AudioPolicyManager.cpp revision 97bb33f58d742539f3382583d7978fca71ffa2d5 
1/*
2 * Copyright (C) 2009 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#define LOG_TAG "AudioPolicyManager"
18//#define LOG_NDEBUG 0
19
20//#define VERY_VERBOSE_LOGGING
21#ifdef VERY_VERBOSE_LOGGING
22#define ALOGVV ALOGV
23#else
24#define ALOGVV(a...) do { } while(0)
25#endif
26
27// A device mask for all audio input devices that are considered "virtual" when evaluating
28// active inputs in getActiveInput()
29#define APM_AUDIO_IN_DEVICE_VIRTUAL_ALL  (AUDIO_DEVICE_IN_REMOTE_SUBMIX|AUDIO_DEVICE_IN_FM_TUNER)
30// A device mask for all audio output devices that are considered "remote" when evaluating
31// active output devices in isStreamActiveRemotely()
32#define APM_AUDIO_OUT_DEVICE_REMOTE_ALL  AUDIO_DEVICE_OUT_REMOTE_SUBMIX
33// A device mask for all audio input and output devices where matching inputs/outputs on device
34// type alone is not enough: the address must match too
35#define APM_AUDIO_DEVICE_MATCH_ADDRESS_ALL (AUDIO_DEVICE_IN_REMOTE_SUBMIX | \
36                                            AUDIO_DEVICE_OUT_REMOTE_SUBMIX)
37
38#include <inttypes.h>
39#include <math.h>
40
41#include <cutils/properties.h>
42#include <utils/Log.h>
43#include <hardware/audio.h>
44#include <hardware/audio_effect.h>
45#include <media/AudioParameter.h>
46#include <media/AudioPolicyHelper.h>
47#include <soundtrigger/SoundTrigger.h>
48#include "AudioPolicyManager.h"
49#include "audio_policy_conf.h"
50
51namespace android {
52
53// ----------------------------------------------------------------------------
54// Definitions for audio_policy.conf file parsing
55// ----------------------------------------------------------------------------
56
57struct StringToEnum {
58    const char *name;
59    uint32_t value;
60};
61
62#define STRING_TO_ENUM(string) { #string, string }
63#define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0]))
64
65const StringToEnum sDeviceNameToEnumTable[] = {
66    STRING_TO_ENUM(AUDIO_DEVICE_OUT_EARPIECE),
67    STRING_TO_ENUM(AUDIO_DEVICE_OUT_SPEAKER),
68    STRING_TO_ENUM(AUDIO_DEVICE_OUT_SPEAKER_SAFE),
69    STRING_TO_ENUM(AUDIO_DEVICE_OUT_WIRED_HEADSET),
70    STRING_TO_ENUM(AUDIO_DEVICE_OUT_WIRED_HEADPHONE),
71    STRING_TO_ENUM(AUDIO_DEVICE_OUT_BLUETOOTH_SCO),
72    STRING_TO_ENUM(AUDIO_DEVICE_OUT_BLUETOOTH_SCO_HEADSET),
73    STRING_TO_ENUM(AUDIO_DEVICE_OUT_BLUETOOTH_SCO_CARKIT),
74    STRING_TO_ENUM(AUDIO_DEVICE_OUT_ALL_SCO),
75    STRING_TO_ENUM(AUDIO_DEVICE_OUT_BLUETOOTH_A2DP),
76    STRING_TO_ENUM(AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES),
77    STRING_TO_ENUM(AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_SPEAKER),
78    STRING_TO_ENUM(AUDIO_DEVICE_OUT_ALL_A2DP),
79    STRING_TO_ENUM(AUDIO_DEVICE_OUT_AUX_DIGITAL),
80    STRING_TO_ENUM(AUDIO_DEVICE_OUT_HDMI),
81    STRING_TO_ENUM(AUDIO_DEVICE_OUT_ANLG_DOCK_HEADSET),
82    STRING_TO_ENUM(AUDIO_DEVICE_OUT_DGTL_DOCK_HEADSET),
83    STRING_TO_ENUM(AUDIO_DEVICE_OUT_USB_ACCESSORY),
84    STRING_TO_ENUM(AUDIO_DEVICE_OUT_USB_DEVICE),
85    STRING_TO_ENUM(AUDIO_DEVICE_OUT_ALL_USB),
86    STRING_TO_ENUM(AUDIO_DEVICE_OUT_REMOTE_SUBMIX),
87    STRING_TO_ENUM(AUDIO_DEVICE_OUT_TELEPHONY_TX),
88    STRING_TO_ENUM(AUDIO_DEVICE_OUT_LINE),
89    STRING_TO_ENUM(AUDIO_DEVICE_OUT_HDMI_ARC),
90    STRING_TO_ENUM(AUDIO_DEVICE_OUT_SPDIF),
91    STRING_TO_ENUM(AUDIO_DEVICE_OUT_FM),
92    STRING_TO_ENUM(AUDIO_DEVICE_OUT_AUX_LINE),
93    STRING_TO_ENUM(AUDIO_DEVICE_IN_AMBIENT),
94    STRING_TO_ENUM(AUDIO_DEVICE_IN_BUILTIN_MIC),
95    STRING_TO_ENUM(AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET),
96    STRING_TO_ENUM(AUDIO_DEVICE_IN_ALL_SCO),
97    STRING_TO_ENUM(AUDIO_DEVICE_IN_WIRED_HEADSET),
98    STRING_TO_ENUM(AUDIO_DEVICE_IN_AUX_DIGITAL),
99    STRING_TO_ENUM(AUDIO_DEVICE_IN_HDMI),
100    STRING_TO_ENUM(AUDIO_DEVICE_IN_TELEPHONY_RX),
101    STRING_TO_ENUM(AUDIO_DEVICE_IN_VOICE_CALL),
102    STRING_TO_ENUM(AUDIO_DEVICE_IN_BACK_MIC),
103    STRING_TO_ENUM(AUDIO_DEVICE_IN_REMOTE_SUBMIX),
104    STRING_TO_ENUM(AUDIO_DEVICE_IN_ANLG_DOCK_HEADSET),
105    STRING_TO_ENUM(AUDIO_DEVICE_IN_DGTL_DOCK_HEADSET),
106    STRING_TO_ENUM(AUDIO_DEVICE_IN_USB_ACCESSORY),
107    STRING_TO_ENUM(AUDIO_DEVICE_IN_USB_DEVICE),
108    STRING_TO_ENUM(AUDIO_DEVICE_IN_FM_TUNER),
109    STRING_TO_ENUM(AUDIO_DEVICE_IN_TV_TUNER),
110    STRING_TO_ENUM(AUDIO_DEVICE_IN_LINE),
111    STRING_TO_ENUM(AUDIO_DEVICE_IN_SPDIF),
112    STRING_TO_ENUM(AUDIO_DEVICE_IN_BLUETOOTH_A2DP),
113    STRING_TO_ENUM(AUDIO_DEVICE_IN_LOOPBACK),
114};
115
116const StringToEnum sOutputFlagNameToEnumTable[] = {
117    STRING_TO_ENUM(AUDIO_OUTPUT_FLAG_DIRECT),
118    STRING_TO_ENUM(AUDIO_OUTPUT_FLAG_PRIMARY),
119    STRING_TO_ENUM(AUDIO_OUTPUT_FLAG_FAST),
120    STRING_TO_ENUM(AUDIO_OUTPUT_FLAG_DEEP_BUFFER),
121    STRING_TO_ENUM(AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD),
122    STRING_TO_ENUM(AUDIO_OUTPUT_FLAG_NON_BLOCKING),
123    STRING_TO_ENUM(AUDIO_OUTPUT_FLAG_HW_AV_SYNC),
124};
125
126const StringToEnum sInputFlagNameToEnumTable[] = {
127    STRING_TO_ENUM(AUDIO_INPUT_FLAG_FAST),
128    STRING_TO_ENUM(AUDIO_INPUT_FLAG_HW_HOTWORD),
129};
130
131const StringToEnum sFormatNameToEnumTable[] = {
132    STRING_TO_ENUM(AUDIO_FORMAT_PCM_16_BIT),
133    STRING_TO_ENUM(AUDIO_FORMAT_PCM_8_BIT),
134    STRING_TO_ENUM(AUDIO_FORMAT_PCM_32_BIT),
135    STRING_TO_ENUM(AUDIO_FORMAT_PCM_8_24_BIT),
136    STRING_TO_ENUM(AUDIO_FORMAT_PCM_FLOAT),
137    STRING_TO_ENUM(AUDIO_FORMAT_PCM_24_BIT_PACKED),
138    STRING_TO_ENUM(AUDIO_FORMAT_MP3),
139    STRING_TO_ENUM(AUDIO_FORMAT_AAC),
140    STRING_TO_ENUM(AUDIO_FORMAT_AAC_MAIN),
141    STRING_TO_ENUM(AUDIO_FORMAT_AAC_LC),
142    STRING_TO_ENUM(AUDIO_FORMAT_AAC_SSR),
143    STRING_TO_ENUM(AUDIO_FORMAT_AAC_LTP),
144    STRING_TO_ENUM(AUDIO_FORMAT_AAC_HE_V1),
145    STRING_TO_ENUM(AUDIO_FORMAT_AAC_SCALABLE),
146    STRING_TO_ENUM(AUDIO_FORMAT_AAC_ERLC),
147    STRING_TO_ENUM(AUDIO_FORMAT_AAC_LD),
148    STRING_TO_ENUM(AUDIO_FORMAT_AAC_HE_V2),
149    STRING_TO_ENUM(AUDIO_FORMAT_AAC_ELD),
150    STRING_TO_ENUM(AUDIO_FORMAT_VORBIS),
151    STRING_TO_ENUM(AUDIO_FORMAT_HE_AAC_V1),
152    STRING_TO_ENUM(AUDIO_FORMAT_HE_AAC_V2),
153    STRING_TO_ENUM(AUDIO_FORMAT_OPUS),
154    STRING_TO_ENUM(AUDIO_FORMAT_AC3),
155    STRING_TO_ENUM(AUDIO_FORMAT_E_AC3),
156};
157
158const StringToEnum sOutChannelsNameToEnumTable[] = {
159    STRING_TO_ENUM(AUDIO_CHANNEL_OUT_MONO),
160    STRING_TO_ENUM(AUDIO_CHANNEL_OUT_STEREO),
161    STRING_TO_ENUM(AUDIO_CHANNEL_OUT_QUAD),
162    STRING_TO_ENUM(AUDIO_CHANNEL_OUT_5POINT1),
163    STRING_TO_ENUM(AUDIO_CHANNEL_OUT_7POINT1),
164};
165
166const StringToEnum sInChannelsNameToEnumTable[] = {
167    STRING_TO_ENUM(AUDIO_CHANNEL_IN_MONO),
168    STRING_TO_ENUM(AUDIO_CHANNEL_IN_STEREO),
169    STRING_TO_ENUM(AUDIO_CHANNEL_IN_FRONT_BACK),
170};
171
172const StringToEnum sGainModeNameToEnumTable[] = {
173    STRING_TO_ENUM(AUDIO_GAIN_MODE_JOINT),
174    STRING_TO_ENUM(AUDIO_GAIN_MODE_CHANNELS),
175    STRING_TO_ENUM(AUDIO_GAIN_MODE_RAMP),
176};
177
178
179uint32_t AudioPolicyManager::stringToEnum(const struct StringToEnum *table,
180                                              size_t size,
181                                              const char *name)
182{
183    for (size_t i = 0; i < size; i++) {
184        if (strcmp(table[i].name, name) == 0) {
185            ALOGV("stringToEnum() found %s", table[i].name);
186            return table[i].value;
187        }
188    }
189    return 0;
190}
191
192const char *AudioPolicyManager::enumToString(const struct StringToEnum *table,
193                                              size_t size,
194                                              uint32_t value)
195{
196    for (size_t i = 0; i < size; i++) {
197        if (table[i].value == value) {
198            return table[i].name;
199        }
200    }
201    return "";
202}
203
204bool AudioPolicyManager::stringToBool(const char *value)
205{
206    return ((strcasecmp("true", value) == 0) || (strcmp("1", value) == 0));
207}
208
209
210// ----------------------------------------------------------------------------
211// AudioPolicyInterface implementation
212// ----------------------------------------------------------------------------
213
214status_t AudioPolicyManager::setDeviceConnectionState(audio_devices_t device,
215                                                          audio_policy_dev_state_t state,
216                                                  const char *device_address)
217{
218    return setDeviceConnectionStateInt(device, state, device_address);
219}
220
221status_t AudioPolicyManager::setDeviceConnectionStateInt(audio_devices_t device,
222                                                          audio_policy_dev_state_t state,
223                                                  const char *device_address)
224{
225    String8 address = (device_address == NULL) ? String8("") : String8(device_address);
226    // handle legacy remote submix case where the address was not always specified
227    if (deviceDistinguishesOnAddress(device) && (address.length() == 0)) {
228        address = String8("0");
229    }
230
231    ALOGV("setDeviceConnectionState() device: %x, state %d, address %s",
232            device, state, address.string());
233
234    // connect/disconnect only 1 device at a time
235    if (!audio_is_output_device(device) && !audio_is_input_device(device)) return BAD_VALUE;
236
237    // handle output devices
238    if (audio_is_output_device(device)) {
239        SortedVector <audio_io_handle_t> outputs;
240
241        sp<DeviceDescriptor> devDesc = new DeviceDescriptor(String8(""), device);
242        devDesc->mAddress = address;
243        ssize_t index = mAvailableOutputDevices.indexOf(devDesc);
244
245        // save a copy of the opened output descriptors before any output is opened or closed
246        // by checkOutputsForDevice(). This will be needed by checkOutputForAllStrategies()
247        mPreviousOutputs = mOutputs;
248        switch (state)
249        {
250        // handle output device connection
251        case AUDIO_POLICY_DEVICE_STATE_AVAILABLE:
252            if (index >= 0) {
253                ALOGW("setDeviceConnectionState() device already connected: %x", device);
254                return INVALID_OPERATION;
255            }
256            ALOGV("setDeviceConnectionState() connecting device %x", device);
257
258            // register new device as available
259            index = mAvailableOutputDevices.add(devDesc);
260            if (index >= 0) {
261                sp<HwModule> module = getModuleForDevice(device);
262                if (module == 0) {
263                    ALOGD("setDeviceConnectionState() could not find HW module for device %08x",
264                          device);
265                    mAvailableOutputDevices.remove(devDesc);
266                    return INVALID_OPERATION;
267                }
268                mAvailableOutputDevices[index]->mId = nextUniqueId();
269                mAvailableOutputDevices[index]->mModule = module;
270            } else {
271                return NO_MEMORY;
272            }
273
274            if (checkOutputsForDevice(devDesc, state, outputs, address) != NO_ERROR) {
275                mAvailableOutputDevices.remove(devDesc);
276                return INVALID_OPERATION;
277            }
278            // outputs should never be empty here
279            ALOG_ASSERT(outputs.size() != 0, "setDeviceConnectionState():"
280                    "checkOutputsForDevice() returned no outputs but status OK");
281            ALOGV("setDeviceConnectionState() checkOutputsForDevice() returned %zu outputs",
282                  outputs.size());
283            break;
284        // handle output device disconnection
285        case AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE: {
286            if (index < 0) {
287                ALOGW("setDeviceConnectionState() device not connected: %x", device);
288                return INVALID_OPERATION;
289            }
290
291            ALOGV("setDeviceConnectionState() disconnecting output device %x", device);
292
293            // Set Disconnect to HALs
294            AudioParameter param = AudioParameter(address);
295            param.addInt(String8(AUDIO_PARAMETER_DEVICE_DISCONNECT), device);
296            mpClientInterface->setParameters(AUDIO_IO_HANDLE_NONE, param.toString());
297
298            // remove device from available output devices
299            mAvailableOutputDevices.remove(devDesc);
300
301            checkOutputsForDevice(devDesc, state, outputs, address);
302            } break;
303
304        default:
305            ALOGE("setDeviceConnectionState() invalid state: %x", state);
306            return BAD_VALUE;
307        }
308
309        // checkA2dpSuspend must run before checkOutputForAllStrategies so that A2DP
310        // output is suspended before any tracks are moved to it
311        checkA2dpSuspend();
312        checkOutputForAllStrategies();
313        // outputs must be closed after checkOutputForAllStrategies() is executed
314        if (!outputs.isEmpty()) {
315            for (size_t i = 0; i < outputs.size(); i++) {
316                sp<AudioOutputDescriptor> desc = mOutputs.valueFor(outputs[i]);
317                // close unused outputs after device disconnection or direct outputs that have been
318                // opened by checkOutputsForDevice() to query dynamic parameters
319                if ((state == AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE) ||
320                        (((desc->mFlags & AUDIO_OUTPUT_FLAG_DIRECT) != 0) &&
321                         (desc->mDirectOpenCount == 0))) {
322                    closeOutput(outputs[i]);
323                }
324            }
325            // check again after closing A2DP output to reset mA2dpSuspended if needed
326            checkA2dpSuspend();
327        }
328
329        updateDevicesAndOutputs();
330        if (mPhoneState == AUDIO_MODE_IN_CALL) {
331            audio_devices_t newDevice = getNewOutputDevice(mPrimaryOutput, false /*fromCache*/);
332            updateCallRouting(newDevice);
333        }
334        for (size_t i = 0; i < mOutputs.size(); i++) {
335            audio_io_handle_t output = mOutputs.keyAt(i);
336            if ((mPhoneState != AUDIO_MODE_IN_CALL) || (output != mPrimaryOutput)) {
337                audio_devices_t newDevice = getNewOutputDevice(mOutputs.keyAt(i),
338                                                               true /*fromCache*/);
339                // do not force device change on duplicated output because if device is 0, it will
340                // also force a device 0 for the two outputs it is duplicated to which may override
341                // a valid device selection on those outputs.
342                bool force = !mOutputs.valueAt(i)->isDuplicated()
343                        && (!deviceDistinguishesOnAddress(device)
344                                // always force when disconnecting (a non-duplicated device)
345                                || (state == AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE));
346                setOutputDevice(output, newDevice, force, 0);
347            }
348        }
349
350        mpClientInterface->onAudioPortListUpdate();
351        return NO_ERROR;
352    }  // end if is output device
353
354    // handle input devices
355    if (audio_is_input_device(device)) {
356        SortedVector <audio_io_handle_t> inputs;
357
358        sp<DeviceDescriptor> devDesc = new DeviceDescriptor(String8(""), device);
359        devDesc->mAddress = address;
360        ssize_t index = mAvailableInputDevices.indexOf(devDesc);
361        switch (state)
362        {
363        // handle input device connection
364        case AUDIO_POLICY_DEVICE_STATE_AVAILABLE: {
365            if (index >= 0) {
366                ALOGW("setDeviceConnectionState() device already connected: %d", device);
367                return INVALID_OPERATION;
368            }
369            sp<HwModule> module = getModuleForDevice(device);
370            if (module == NULL) {
371                ALOGW("setDeviceConnectionState(): could not find HW module for device %08x",
372                      device);
373                return INVALID_OPERATION;
374            }
375            if (checkInputsForDevice(device, state, inputs, address) != NO_ERROR) {
376                return INVALID_OPERATION;
377            }
378
379            index = mAvailableInputDevices.add(devDesc);
380            if (index >= 0) {
381                mAvailableInputDevices[index]->mId = nextUniqueId();
382                mAvailableInputDevices[index]->mModule = module;
383            } else {
384                return NO_MEMORY;
385            }
386        } break;
387
388        // handle input device disconnection
389        case AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE: {
390            if (index < 0) {
391                ALOGW("setDeviceConnectionState() device not connected: %d", device);
392                return INVALID_OPERATION;
393            }
394
395            ALOGV("setDeviceConnectionState() disconnecting input device %x", device);
396
397            // Set Disconnect to HALs
398            AudioParameter param = AudioParameter(address);
399            param.addInt(String8(AUDIO_PARAMETER_DEVICE_DISCONNECT), device);
400            mpClientInterface->setParameters(AUDIO_IO_HANDLE_NONE, param.toString());
401
402            checkInputsForDevice(device, state, inputs, address);
403            mAvailableInputDevices.remove(devDesc);
404
405        } break;
406
407        default:
408            ALOGE("setDeviceConnectionState() invalid state: %x", state);
409            return BAD_VALUE;
410        }
411
412        closeAllInputs();
413
414        if (mPhoneState == AUDIO_MODE_IN_CALL) {
415            audio_devices_t newDevice = getNewOutputDevice(mPrimaryOutput, false /*fromCache*/);
416            updateCallRouting(newDevice);
417        }
418
419        mpClientInterface->onAudioPortListUpdate();
420        return NO_ERROR;
421    } // end if is input device
422
423    ALOGW("setDeviceConnectionState() invalid device: %x", device);
424    return BAD_VALUE;
425}
426
427audio_policy_dev_state_t AudioPolicyManager::getDeviceConnectionState(audio_devices_t device,
428                                                  const char *device_address)
429{
430    audio_policy_dev_state_t state = AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE;
431    sp<DeviceDescriptor> devDesc = new DeviceDescriptor(String8(""), device);
432    devDesc->mAddress = (device_address == NULL) ? String8("") : String8(device_address);
433    // handle legacy remote submix case where the address was not always specified
434    if (deviceDistinguishesOnAddress(device) && (devDesc->mAddress.length() == 0)) {
435        devDesc->mAddress = String8("0");
436    }
437    ssize_t index;
438    DeviceVector *deviceVector;
439
440    if (audio_is_output_device(device)) {
441        deviceVector = &mAvailableOutputDevices;
442    } else if (audio_is_input_device(device)) {
443        deviceVector = &mAvailableInputDevices;
444    } else {
445        ALOGW("getDeviceConnectionState() invalid device type %08x", device);
446        return AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE;
447    }
448
449    index = deviceVector->indexOf(devDesc);
450    if (index >= 0) {
451        return AUDIO_POLICY_DEVICE_STATE_AVAILABLE;
452    } else {
453        return AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE;
454    }
455}
456
457void AudioPolicyManager::updateCallRouting(audio_devices_t rxDevice, int delayMs)
458{
459    bool createTxPatch = false;
460    struct audio_patch patch;
461    patch.num_sources = 1;
462    patch.num_sinks = 1;
463    status_t status;
464    audio_patch_handle_t afPatchHandle;
465    DeviceVector deviceList;
466
467    audio_devices_t txDevice = getDeviceAndMixForInputSource(AUDIO_SOURCE_VOICE_COMMUNICATION);
468    ALOGV("updateCallRouting device rxDevice %08x txDevice %08x", rxDevice, txDevice);
469
470    // release existing RX patch if any
471    if (mCallRxPatch != 0) {
472        mpClientInterface->releaseAudioPatch(mCallRxPatch->mAfPatchHandle, 0);
473        mCallRxPatch.clear();
474    }
475    // release TX patch if any
476    if (mCallTxPatch != 0) {
477        mpClientInterface->releaseAudioPatch(mCallTxPatch->mAfPatchHandle, 0);
478        mCallTxPatch.clear();
479    }
480
481    // If the RX device is on the primary HW module, then use legacy routing method for voice calls
482    // via setOutputDevice() on primary output.
483    // Otherwise, create two audio patches for TX and RX path.
484    if (availablePrimaryOutputDevices() & rxDevice) {
485        setOutputDevice(mPrimaryOutput, rxDevice, true, delayMs);
486        // If the TX device is also on the primary HW module, setOutputDevice() will take care
487        // of it due to legacy implementation. If not, create a patch.
488        if ((availablePrimaryInputDevices() & txDevice & ~AUDIO_DEVICE_BIT_IN)
489                == AUDIO_DEVICE_NONE) {
490            createTxPatch = true;
491        }
492    } else {
493        // create RX path audio patch
494        deviceList = mAvailableOutputDevices.getDevicesFromType(rxDevice);
495        ALOG_ASSERT(!deviceList.isEmpty(),
496                    "updateCallRouting() selected device not in output device list");
497        sp<DeviceDescriptor> rxSinkDeviceDesc = deviceList.itemAt(0);
498        deviceList = mAvailableInputDevices.getDevicesFromType(AUDIO_DEVICE_IN_TELEPHONY_RX);
499        ALOG_ASSERT(!deviceList.isEmpty(),
500                    "updateCallRouting() no telephony RX device");
501        sp<DeviceDescriptor> rxSourceDeviceDesc = deviceList.itemAt(0);
502
503        rxSourceDeviceDesc->toAudioPortConfig(&patch.sources[0]);
504        rxSinkDeviceDesc->toAudioPortConfig(&patch.sinks[0]);
505
506        // request to reuse existing output stream if one is already opened to reach the RX device
507        SortedVector<audio_io_handle_t> outputs =
508                                getOutputsForDevice(rxDevice, mOutputs);
509        audio_io_handle_t output = selectOutput(outputs,
510                                                AUDIO_OUTPUT_FLAG_NONE,
511                                                AUDIO_FORMAT_INVALID);
512        if (output != AUDIO_IO_HANDLE_NONE) {
513            sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
514            ALOG_ASSERT(!outputDesc->isDuplicated(),
515                        "updateCallRouting() RX device output is duplicated");
516            outputDesc->toAudioPortConfig(&patch.sources[1]);
517            patch.num_sources = 2;
518        }
519
520        afPatchHandle = AUDIO_PATCH_HANDLE_NONE;
521        status = mpClientInterface->createAudioPatch(&patch, &afPatchHandle, 0);
522        ALOGW_IF(status != NO_ERROR, "updateCallRouting() error %d creating RX audio patch",
523                                               status);
524        if (status == NO_ERROR) {
525            mCallRxPatch = new AudioPatch((audio_patch_handle_t)nextUniqueId(),
526                                       &patch, mUidCached);
527            mCallRxPatch->mAfPatchHandle = afPatchHandle;
528            mCallRxPatch->mUid = mUidCached;
529        }
530        createTxPatch = true;
531    }
532    if (createTxPatch) {
533
534        struct audio_patch patch;
535        patch.num_sources = 1;
536        patch.num_sinks = 1;
537        deviceList = mAvailableInputDevices.getDevicesFromType(txDevice);
538        ALOG_ASSERT(!deviceList.isEmpty(),
539                    "updateCallRouting() selected device not in input device list");
540        sp<DeviceDescriptor> txSourceDeviceDesc = deviceList.itemAt(0);
541        txSourceDeviceDesc->toAudioPortConfig(&patch.sources[0]);
542        deviceList = mAvailableOutputDevices.getDevicesFromType(AUDIO_DEVICE_OUT_TELEPHONY_TX);
543        ALOG_ASSERT(!deviceList.isEmpty(),
544                    "updateCallRouting() no telephony TX device");
545        sp<DeviceDescriptor> txSinkDeviceDesc = deviceList.itemAt(0);
546        txSinkDeviceDesc->toAudioPortConfig(&patch.sinks[0]);
547
548        SortedVector<audio_io_handle_t> outputs =
549                                getOutputsForDevice(AUDIO_DEVICE_OUT_TELEPHONY_TX, mOutputs);
550        audio_io_handle_t output = selectOutput(outputs,
551                                                AUDIO_OUTPUT_FLAG_NONE,
552                                                AUDIO_FORMAT_INVALID);
553        // request to reuse existing output stream if one is already opened to reach the TX
554        // path output device
555        if (output != AUDIO_IO_HANDLE_NONE) {
556            sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
557            ALOG_ASSERT(!outputDesc->isDuplicated(),
558                        "updateCallRouting() RX device output is duplicated");
559            outputDesc->toAudioPortConfig(&patch.sources[1]);
560            patch.num_sources = 2;
561        }
562
563        afPatchHandle = AUDIO_PATCH_HANDLE_NONE;
564        status = mpClientInterface->createAudioPatch(&patch, &afPatchHandle, 0);
565        ALOGW_IF(status != NO_ERROR, "setPhoneState() error %d creating TX audio patch",
566                                               status);
567        if (status == NO_ERROR) {
568            mCallTxPatch = new AudioPatch((audio_patch_handle_t)nextUniqueId(),
569                                       &patch, mUidCached);
570            mCallTxPatch->mAfPatchHandle = afPatchHandle;
571            mCallTxPatch->mUid = mUidCached;
572        }
573    }
574}
575
576void AudioPolicyManager::setPhoneState(audio_mode_t state)
577{
578    ALOGV("setPhoneState() state %d", state);
579    if (state < 0 || state >= AUDIO_MODE_CNT) {
580        ALOGW("setPhoneState() invalid state %d", state);
581        return;
582    }
583
584    if (state == mPhoneState ) {
585        ALOGW("setPhoneState() setting same state %d", state);
586        return;
587    }
588
589    // if leaving call state, handle special case of active streams
590    // pertaining to sonification strategy see handleIncallSonification()
591    if (isInCall()) {
592        ALOGV("setPhoneState() in call state management: new state is %d", state);
593        for (int stream = 0; stream < AUDIO_STREAM_CNT; stream++) {
594            if (stream == AUDIO_STREAM_PATCH) {
595                continue;
596            }
597            handleIncallSonification((audio_stream_type_t)stream, false, true);
598        }
599    }
600
601    // store previous phone state for management of sonification strategy below
602    int oldState = mPhoneState;
603    mPhoneState = state;
604    bool force = false;
605
606    // are we entering or starting a call
607    if (!isStateInCall(oldState) && isStateInCall(state)) {
608        ALOGV("  Entering call in setPhoneState()");
609        // force routing command to audio hardware when starting a call
610        // even if no device change is needed
611        force = true;
612        for (int j = 0; j < DEVICE_CATEGORY_CNT; j++) {
613            mStreams[AUDIO_STREAM_DTMF].mVolumeCurve[j] =
614                    sVolumeProfiles[AUDIO_STREAM_VOICE_CALL][j];
615        }
616    } else if (isStateInCall(oldState) && !isStateInCall(state)) {
617        ALOGV("  Exiting call in setPhoneState()");
618        // force routing command to audio hardware when exiting a call
619        // even if no device change is needed
620        force = true;
621        for (int j = 0; j < DEVICE_CATEGORY_CNT; j++) {
622            mStreams[AUDIO_STREAM_DTMF].mVolumeCurve[j] =
623                    sVolumeProfiles[AUDIO_STREAM_DTMF][j];
624        }
625    } else if (isStateInCall(state) && (state != oldState)) {
626        ALOGV("  Switching between telephony and VoIP in setPhoneState()");
627        // force routing command to audio hardware when switching between telephony and VoIP
628        // even if no device change is needed
629        force = true;
630    }
631
632    // check for device and output changes triggered by new phone state
633    checkA2dpSuspend();
634    checkOutputForAllStrategies();
635    updateDevicesAndOutputs();
636
637    sp<AudioOutputDescriptor> hwOutputDesc = mOutputs.valueFor(mPrimaryOutput);
638
639    int delayMs = 0;
640    if (isStateInCall(state)) {
641        nsecs_t sysTime = systemTime();
642        for (size_t i = 0; i < mOutputs.size(); i++) {
643            sp<AudioOutputDescriptor> desc = mOutputs.valueAt(i);
644            // mute media and sonification strategies and delay device switch by the largest
645            // latency of any output where either strategy is active.
646            // This avoid sending the ring tone or music tail into the earpiece or headset.
647            if ((desc->isStrategyActive(STRATEGY_MEDIA,
648                                     SONIFICATION_HEADSET_MUSIC_DELAY,
649                                     sysTime) ||
650                    desc->isStrategyActive(STRATEGY_SONIFICATION,
651                                         SONIFICATION_HEADSET_MUSIC_DELAY,
652                                         sysTime)) &&
653                    (delayMs < (int)desc->mLatency*2)) {
654                delayMs = desc->mLatency*2;
655            }
656            setStrategyMute(STRATEGY_MEDIA, true, mOutputs.keyAt(i));
657            setStrategyMute(STRATEGY_MEDIA, false, mOutputs.keyAt(i), MUTE_TIME_MS,
658                getDeviceForStrategy(STRATEGY_MEDIA, true /*fromCache*/));
659            setStrategyMute(STRATEGY_SONIFICATION, true, mOutputs.keyAt(i));
660            setStrategyMute(STRATEGY_SONIFICATION, false, mOutputs.keyAt(i), MUTE_TIME_MS,
661                getDeviceForStrategy(STRATEGY_SONIFICATION, true /*fromCache*/));
662        }
663    }
664
665    // Note that despite the fact that getNewOutputDevice() is called on the primary output,
666    // the device returned is not necessarily reachable via this output
667    audio_devices_t rxDevice = getNewOutputDevice(mPrimaryOutput, false /*fromCache*/);
668    // force routing command to audio hardware when ending call
669    // even if no device change is needed
670    if (isStateInCall(oldState) && rxDevice == AUDIO_DEVICE_NONE) {
671        rxDevice = hwOutputDesc->device();
672    }
673
674    if (state == AUDIO_MODE_IN_CALL) {
675        updateCallRouting(rxDevice, delayMs);
676    } else if (oldState == AUDIO_MODE_IN_CALL) {
677        if (mCallRxPatch != 0) {
678            mpClientInterface->releaseAudioPatch(mCallRxPatch->mAfPatchHandle, 0);
679            mCallRxPatch.clear();
680        }
681        if (mCallTxPatch != 0) {
682            mpClientInterface->releaseAudioPatch(mCallTxPatch->mAfPatchHandle, 0);
683            mCallTxPatch.clear();
684        }
685        setOutputDevice(mPrimaryOutput, rxDevice, force, 0);
686    } else {
687        setOutputDevice(mPrimaryOutput, rxDevice, force, 0);
688    }
689    // if entering in call state, handle special case of active streams
690    // pertaining to sonification strategy see handleIncallSonification()
691    if (isStateInCall(state)) {
692        ALOGV("setPhoneState() in call state management: new state is %d", state);
693        for (int stream = 0; stream < AUDIO_STREAM_CNT; stream++) {
694            if (stream == AUDIO_STREAM_PATCH) {
695                continue;
696            }
697            handleIncallSonification((audio_stream_type_t)stream, true, true);
698        }
699    }
700
701    // Flag that ringtone volume must be limited to music volume until we exit MODE_RINGTONE
702    if (state == AUDIO_MODE_RINGTONE &&
703        isStreamActive(AUDIO_STREAM_MUSIC, SONIFICATION_HEADSET_MUSIC_DELAY)) {
704        mLimitRingtoneVolume = true;
705    } else {
706        mLimitRingtoneVolume = false;
707    }
708}
709
710void AudioPolicyManager::setForceUse(audio_policy_force_use_t usage,
711                                         audio_policy_forced_cfg_t config)
712{
713    ALOGV("setForceUse() usage %d, config %d, mPhoneState %d", usage, config, mPhoneState);
714
715    bool forceVolumeReeval = false;
716    switch(usage) {
717    case AUDIO_POLICY_FORCE_FOR_COMMUNICATION:
718        if (config != AUDIO_POLICY_FORCE_SPEAKER && config != AUDIO_POLICY_FORCE_BT_SCO &&
719            config != AUDIO_POLICY_FORCE_NONE) {
720            ALOGW("setForceUse() invalid config %d for FOR_COMMUNICATION", config);
721            return;
722        }
723        forceVolumeReeval = true;
724        mForceUse[usage] = config;
725        break;
726    case AUDIO_POLICY_FORCE_FOR_MEDIA:
727        if (config != AUDIO_POLICY_FORCE_HEADPHONES && config != AUDIO_POLICY_FORCE_BT_A2DP &&
728            config != AUDIO_POLICY_FORCE_WIRED_ACCESSORY &&
729            config != AUDIO_POLICY_FORCE_ANALOG_DOCK &&
730            config != AUDIO_POLICY_FORCE_DIGITAL_DOCK && config != AUDIO_POLICY_FORCE_NONE &&
731            config != AUDIO_POLICY_FORCE_NO_BT_A2DP && config != AUDIO_POLICY_FORCE_SPEAKER ) {
732            ALOGW("setForceUse() invalid config %d for FOR_MEDIA", config);
733            return;
734        }
735        mForceUse[usage] = config;
736        break;
737    case AUDIO_POLICY_FORCE_FOR_RECORD:
738        if (config != AUDIO_POLICY_FORCE_BT_SCO && config != AUDIO_POLICY_FORCE_WIRED_ACCESSORY &&
739            config != AUDIO_POLICY_FORCE_NONE) {
740            ALOGW("setForceUse() invalid config %d for FOR_RECORD", config);
741            return;
742        }
743        mForceUse[usage] = config;
744        break;
745    case AUDIO_POLICY_FORCE_FOR_DOCK:
746        if (config != AUDIO_POLICY_FORCE_NONE && config != AUDIO_POLICY_FORCE_BT_CAR_DOCK &&
747            config != AUDIO_POLICY_FORCE_BT_DESK_DOCK &&
748            config != AUDIO_POLICY_FORCE_WIRED_ACCESSORY &&
749            config != AUDIO_POLICY_FORCE_ANALOG_DOCK &&
750            config != AUDIO_POLICY_FORCE_DIGITAL_DOCK) {
751            ALOGW("setForceUse() invalid config %d for FOR_DOCK", config);
752        }
753        forceVolumeReeval = true;
754        mForceUse[usage] = config;
755        break;
756    case AUDIO_POLICY_FORCE_FOR_SYSTEM:
757        if (config != AUDIO_POLICY_FORCE_NONE &&
758            config != AUDIO_POLICY_FORCE_SYSTEM_ENFORCED) {
759            ALOGW("setForceUse() invalid config %d for FOR_SYSTEM", config);
760        }
761        forceVolumeReeval = true;
762        mForceUse[usage] = config;
763        break;
764    case AUDIO_POLICY_FORCE_FOR_HDMI_SYSTEM_AUDIO:
765        if (config != AUDIO_POLICY_FORCE_NONE &&
766            config != AUDIO_POLICY_FORCE_HDMI_SYSTEM_AUDIO_ENFORCED) {
767            ALOGW("setForceUse() invalid config %d forHDMI_SYSTEM_AUDIO", config);
768        }
769        mForceUse[usage] = config;
770        break;
771    default:
772        ALOGW("setForceUse() invalid usage %d", usage);
773        break;
774    }
775
776    // check for device and output changes triggered by new force usage
777    checkA2dpSuspend();
778    checkOutputForAllStrategies();
779    updateDevicesAndOutputs();
780    if (mPhoneState == AUDIO_MODE_IN_CALL) {
781        audio_devices_t newDevice = getNewOutputDevice(mPrimaryOutput, true /*fromCache*/);
782        updateCallRouting(newDevice);
783    }
784    for (size_t i = 0; i < mOutputs.size(); i++) {
785        audio_io_handle_t output = mOutputs.keyAt(i);
786        audio_devices_t newDevice = getNewOutputDevice(output, true /*fromCache*/);
787        if ((mPhoneState != AUDIO_MODE_IN_CALL) || (output != mPrimaryOutput)) {
788            setOutputDevice(output, newDevice, (newDevice != AUDIO_DEVICE_NONE));
789        }
790        if (forceVolumeReeval && (newDevice != AUDIO_DEVICE_NONE)) {
791            applyStreamVolumes(output, newDevice, 0, true);
792        }
793    }
794
795    audio_io_handle_t activeInput = getActiveInput();
796    if (activeInput != 0) {
797        setInputDevice(activeInput, getNewInputDevice(activeInput));
798    }
799
800}
801
802audio_policy_forced_cfg_t AudioPolicyManager::getForceUse(audio_policy_force_use_t usage)
803{
804    return mForceUse[usage];
805}
806
807void AudioPolicyManager::setSystemProperty(const char* property, const char* value)
808{
809    ALOGV("setSystemProperty() property %s, value %s", property, value);
810}
811
812// Find a direct output profile compatible with the parameters passed, even if the input flags do
813// not explicitly request a direct output
814sp<AudioPolicyManager::IOProfile> AudioPolicyManager::getProfileForDirectOutput(
815                                                               audio_devices_t device,
816                                                               uint32_t samplingRate,
817                                                               audio_format_t format,
818                                                               audio_channel_mask_t channelMask,
819                                                               audio_output_flags_t flags)
820{
821    for (size_t i = 0; i < mHwModules.size(); i++) {
822        if (mHwModules[i]->mHandle == 0) {
823            continue;
824        }
825        for (size_t j = 0; j < mHwModules[i]->mOutputProfiles.size(); j++) {
826            sp<IOProfile> profile = mHwModules[i]->mOutputProfiles[j];
827            bool found = profile->isCompatibleProfile(device, String8(""), samplingRate,
828                    NULL /*updatedSamplingRate*/, format, channelMask,
829                    flags & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD ?
830                        AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD : AUDIO_OUTPUT_FLAG_DIRECT);
831            if (found && (mAvailableOutputDevices.types() & profile->mSupportedDevices.types())) {
832                return profile;
833            }
834        }
835    }
836    return 0;
837}
838
839audio_io_handle_t AudioPolicyManager::getOutput(audio_stream_type_t stream,
840                                    uint32_t samplingRate,
841                                    audio_format_t format,
842                                    audio_channel_mask_t channelMask,
843                                    audio_output_flags_t flags,
844                                    const audio_offload_info_t *offloadInfo)
845{
846    routing_strategy strategy = getStrategy(stream);
847    audio_devices_t device = getDeviceForStrategy(strategy, false /*fromCache*/);
848    ALOGV("getOutput() device %d, stream %d, samplingRate %d, format %x, channelMask %x, flags %x",
849          device, stream, samplingRate, format, channelMask, flags);
850
851    return getOutputForDevice(device, AUDIO_SESSION_ALLOCATE,
852                              stream, samplingRate,format, channelMask,
853                              flags, offloadInfo);
854}
855
856status_t AudioPolicyManager::getOutputForAttr(const audio_attributes_t *attr,
857                                              audio_io_handle_t *output,
858                                              audio_session_t session,
859                                              audio_stream_type_t *stream,
860                                              uint32_t samplingRate,
861                                              audio_format_t format,
862                                              audio_channel_mask_t channelMask,
863                                              audio_output_flags_t flags,
864                                              const audio_offload_info_t *offloadInfo)
865{
866    audio_attributes_t attributes;
867    if (attr != NULL) {
868        if (!isValidAttributes(attr)) {
869            ALOGE("getOutputForAttr() invalid attributes: usage=%d content=%d flags=0x%x tags=[%s]",
870                  attr->usage, attr->content_type, attr->flags,
871                  attr->tags);
872            return BAD_VALUE;
873        }
874        attributes = *attr;
875    } else {
876        if (*stream < AUDIO_STREAM_MIN || *stream >= AUDIO_STREAM_PUBLIC_CNT) {
877            ALOGE("getOutputForAttr():  invalid stream type");
878            return BAD_VALUE;
879        }
880        stream_type_to_audio_attributes(*stream, &attributes);
881    }
882
883    for (size_t i = 0; i < mPolicyMixes.size(); i++) {
884        sp<AudioOutputDescriptor> desc;
885        if (mPolicyMixes[i]->mMix.mMixType == MIX_TYPE_PLAYERS) {
886            for (size_t j = 0; j < mPolicyMixes[i]->mMix.mCriteria.size(); j++) {
887                if ((RULE_MATCH_ATTRIBUTE_USAGE == mPolicyMixes[i]->mMix.mCriteria[j].mRule &&
888                        mPolicyMixes[i]->mMix.mCriteria[j].mAttr.mUsage == attributes.usage) ||
889                    (RULE_EXCLUDE_ATTRIBUTE_USAGE == mPolicyMixes[i]->mMix.mCriteria[j].mRule &&
890                        mPolicyMixes[i]->mMix.mCriteria[j].mAttr.mUsage != attributes.usage)) {
891                    desc = mPolicyMixes[i]->mOutput;
892                    break;
893                }
894                if (strncmp(attributes.tags, "addr=", strlen("addr=")) == 0 &&
895                        strncmp(attributes.tags + strlen("addr="),
896                                mPolicyMixes[i]->mMix.mRegistrationId.string(),
897                                AUDIO_ATTRIBUTES_TAGS_MAX_SIZE - strlen("addr=") - 1) == 0) {
898                    desc = mPolicyMixes[i]->mOutput;
899                    break;
900                }
901            }
902        } else if (mPolicyMixes[i]->mMix.mMixType == MIX_TYPE_RECORDERS) {
903            if (attributes.usage == AUDIO_USAGE_VIRTUAL_SOURCE &&
904                    strncmp(attributes.tags, "addr=", strlen("addr=")) == 0 &&
905                    strncmp(attributes.tags + strlen("addr="),
906                            mPolicyMixes[i]->mMix.mRegistrationId.string(),
907                            AUDIO_ATTRIBUTES_TAGS_MAX_SIZE - strlen("addr=") - 1) == 0) {
908                desc = mPolicyMixes[i]->mOutput;
909            }
910        }
911        if (desc != 0) {
912            if (!audio_is_linear_pcm(format)) {
913                return BAD_VALUE;
914            }
915            desc->mPolicyMix = &mPolicyMixes[i]->mMix;
916            *stream = streamTypefromAttributesInt(&attributes);
917            *output = desc->mIoHandle;
918            ALOGV("getOutputForAttr() returns output %d", *output);
919            return NO_ERROR;
920        }
921    }
922    if (attributes.usage == AUDIO_USAGE_VIRTUAL_SOURCE) {
923        ALOGW("getOutputForAttr() no policy mix found for usage AUDIO_USAGE_VIRTUAL_SOURCE");
924        return BAD_VALUE;
925    }
926
927    ALOGV("getOutputForAttr() usage=%d, content=%d, tag=%s flags=%08x",
928            attributes.usage, attributes.content_type, attributes.tags, attributes.flags);
929
930    routing_strategy strategy = (routing_strategy) getStrategyForAttr(&attributes);
931    audio_devices_t device = getDeviceForStrategy(strategy, false /*fromCache*/);
932
933    if ((attributes.flags & AUDIO_FLAG_HW_AV_SYNC) != 0) {
934        flags = (audio_output_flags_t)(flags | AUDIO_OUTPUT_FLAG_HW_AV_SYNC);
935    }
936
937    ALOGV("getOutputForAttr() device 0x%x, samplingRate %d, format %x, channelMask %x, flags %x",
938          device, samplingRate, format, channelMask, flags);
939
940    *stream = streamTypefromAttributesInt(&attributes);
941    *output = getOutputForDevice(device, session, *stream,
942                                 samplingRate, format, channelMask,
943                                 flags, offloadInfo);
944    if (*output == AUDIO_IO_HANDLE_NONE) {
945        return INVALID_OPERATION;
946    }
947    return NO_ERROR;
948}
949
950audio_io_handle_t AudioPolicyManager::getOutputForDevice(
951        audio_devices_t device,
952        audio_session_t session __unused,
953        audio_stream_type_t stream,
954        uint32_t samplingRate,
955        audio_format_t format,
956        audio_channel_mask_t channelMask,
957        audio_output_flags_t flags,
958        const audio_offload_info_t *offloadInfo)
959{
960    audio_io_handle_t output = AUDIO_IO_HANDLE_NONE;
961    uint32_t latency = 0;
962    status_t status;
963
964#ifdef AUDIO_POLICY_TEST
965    if (mCurOutput != 0) {
966        ALOGV("getOutput() test output mCurOutput %d, samplingRate %d, format %d, channelMask %x, mDirectOutput %d",
967                mCurOutput, mTestSamplingRate, mTestFormat, mTestChannels, mDirectOutput);
968
969        if (mTestOutputs[mCurOutput] == 0) {
970            ALOGV("getOutput() opening test output");
971            sp<AudioOutputDescriptor> outputDesc = new AudioOutputDescriptor(NULL);
972            outputDesc->mDevice = mTestDevice;
973            outputDesc->mLatency = mTestLatencyMs;
974            outputDesc->mFlags =
975                    (audio_output_flags_t)(mDirectOutput ? AUDIO_OUTPUT_FLAG_DIRECT : 0);
976            outputDesc->mRefCount[stream] = 0;
977            audio_config_t config = AUDIO_CONFIG_INITIALIZER;
978            config.sample_rate = mTestSamplingRate;
979            config.channel_mask = mTestChannels;
980            config.format = mTestFormat;
981            if (offloadInfo != NULL) {
982                config.offload_info = *offloadInfo;
983            }
984            status = mpClientInterface->openOutput(0,
985                                                  &mTestOutputs[mCurOutput],
986                                                  &config,
987                                                  &outputDesc->mDevice,
988                                                  String8(""),
989                                                  &outputDesc->mLatency,
990                                                  outputDesc->mFlags);
991            if (status == NO_ERROR) {
992                outputDesc->mSamplingRate = config.sample_rate;
993                outputDesc->mFormat = config.format;
994                outputDesc->mChannelMask = config.channel_mask;
995                AudioParameter outputCmd = AudioParameter();
996                outputCmd.addInt(String8("set_id"),mCurOutput);
997                mpClientInterface->setParameters(mTestOutputs[mCurOutput],outputCmd.toString());
998                addOutput(mTestOutputs[mCurOutput], outputDesc);
999            }
1000        }
1001        return mTestOutputs[mCurOutput];
1002    }
1003#endif //AUDIO_POLICY_TEST
1004
1005    // open a direct output if required by specified parameters
1006    //force direct flag if offload flag is set: offloading implies a direct output stream
1007    // and all common behaviors are driven by checking only the direct flag
1008    // this should normally be set appropriately in the policy configuration file
1009    if ((flags & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) != 0) {
1010        flags = (audio_output_flags_t)(flags | AUDIO_OUTPUT_FLAG_DIRECT);
1011    }
1012    if ((flags & AUDIO_OUTPUT_FLAG_HW_AV_SYNC) != 0) {
1013        flags = (audio_output_flags_t)(flags | AUDIO_OUTPUT_FLAG_DIRECT);
1014    }
1015    // only allow deep buffering for music stream type
1016    if (stream != AUDIO_STREAM_MUSIC) {
1017        flags = (audio_output_flags_t)(flags &~AUDIO_OUTPUT_FLAG_DEEP_BUFFER);
1018    }
1019
1020    sp<IOProfile> profile;
1021
1022    // skip direct output selection if the request can obviously be attached to a mixed output
1023    // and not explicitly requested
1024    if (((flags & AUDIO_OUTPUT_FLAG_DIRECT) == 0) &&
1025            audio_is_linear_pcm(format) && samplingRate <= MAX_MIXER_SAMPLING_RATE &&
1026            audio_channel_count_from_out_mask(channelMask) <= 2) {
1027        goto non_direct_output;
1028    }
1029
1030    // Do not allow offloading if one non offloadable effect is enabled. This prevents from
1031    // creating an offloaded track and tearing it down immediately after start when audioflinger
1032    // detects there is an active non offloadable effect.
1033    // FIXME: We should check the audio session here but we do not have it in this context.
1034    // This may prevent offloading in rare situations where effects are left active by apps
1035    // in the background.
1036
1037    if (((flags & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) == 0) ||
1038            !isNonOffloadableEffectEnabled()) {
1039        profile = getProfileForDirectOutput(device,
1040                                           samplingRate,
1041                                           format,
1042                                           channelMask,
1043                                           (audio_output_flags_t)flags);
1044    }
1045
1046    if (profile != 0) {
1047        sp<AudioOutputDescriptor> outputDesc = NULL;
1048
1049        for (size_t i = 0; i < mOutputs.size(); i++) {
1050            sp<AudioOutputDescriptor> desc = mOutputs.valueAt(i);
1051            if (!desc->isDuplicated() && (profile == desc->mProfile)) {
1052                outputDesc = desc;
1053                // reuse direct output if currently open and configured with same parameters
1054                if ((samplingRate == outputDesc->mSamplingRate) &&
1055                        (format == outputDesc->mFormat) &&
1056                        (channelMask == outputDesc->mChannelMask)) {
1057                    outputDesc->mDirectOpenCount++;
1058                    ALOGV("getOutput() reusing direct output %d", mOutputs.keyAt(i));
1059                    return mOutputs.keyAt(i);
1060                }
1061            }
1062        }
1063        // close direct output if currently open and configured with different parameters
1064        if (outputDesc != NULL) {
1065            closeOutput(outputDesc->mIoHandle);
1066        }
1067        outputDesc = new AudioOutputDescriptor(profile);
1068        outputDesc->mDevice = device;
1069        outputDesc->mLatency = 0;
1070        outputDesc->mFlags =(audio_output_flags_t) (outputDesc->mFlags | flags);
1071        audio_config_t config = AUDIO_CONFIG_INITIALIZER;
1072        config.sample_rate = samplingRate;
1073        config.channel_mask = channelMask;
1074        config.format = format;
1075        if (offloadInfo != NULL) {
1076            config.offload_info = *offloadInfo;
1077        }
1078        status = mpClientInterface->openOutput(profile->mModule->mHandle,
1079                                               &output,
1080                                               &config,
1081                                               &outputDesc->mDevice,
1082                                               String8(""),
1083                                               &outputDesc->mLatency,
1084                                               outputDesc->mFlags);
1085
1086        // only accept an output with the requested parameters
1087        if (status != NO_ERROR ||
1088            (samplingRate != 0 && samplingRate != config.sample_rate) ||
1089            (format != AUDIO_FORMAT_DEFAULT && format != config.format) ||
1090            (channelMask != 0 && channelMask != config.channel_mask)) {
1091            ALOGV("getOutput() failed opening direct output: output %d samplingRate %d %d,"
1092                    "format %d %d, channelMask %04x %04x", output, samplingRate,
1093                    outputDesc->mSamplingRate, format, outputDesc->mFormat, channelMask,
1094                    outputDesc->mChannelMask);
1095            if (output != AUDIO_IO_HANDLE_NONE) {
1096                mpClientInterface->closeOutput(output);
1097            }
1098            return AUDIO_IO_HANDLE_NONE;
1099        }
1100        outputDesc->mSamplingRate = config.sample_rate;
1101        outputDesc->mChannelMask = config.channel_mask;
1102        outputDesc->mFormat = config.format;
1103        outputDesc->mRefCount[stream] = 0;
1104        outputDesc->mStopTime[stream] = 0;
1105        outputDesc->mDirectOpenCount = 1;
1106
1107        audio_io_handle_t srcOutput = getOutputForEffect();
1108        addOutput(output, outputDesc);
1109        audio_io_handle_t dstOutput = getOutputForEffect();
1110        if (dstOutput == output) {
1111            mpClientInterface->moveEffects(AUDIO_SESSION_OUTPUT_MIX, srcOutput, dstOutput);
1112        }
1113        mPreviousOutputs = mOutputs;
1114        ALOGV("getOutput() returns new direct output %d", output);
1115        mpClientInterface->onAudioPortListUpdate();
1116        return output;
1117    }
1118
1119non_direct_output:
1120
1121    // ignoring channel mask due to downmix capability in mixer
1122
1123    // open a non direct output
1124
1125    // for non direct outputs, only PCM is supported
1126    if (audio_is_linear_pcm(format)) {
1127        // get which output is suitable for the specified stream. The actual
1128        // routing change will happen when startOutput() will be called
1129        SortedVector<audio_io_handle_t> outputs = getOutputsForDevice(device, mOutputs);
1130
1131        // at this stage we should ignore the DIRECT flag as no direct output could be found earlier
1132        flags = (audio_output_flags_t)(flags & ~AUDIO_OUTPUT_FLAG_DIRECT);
1133        output = selectOutput(outputs, flags, format);
1134    }
1135    ALOGW_IF((output == 0), "getOutput() could not find output for stream %d, samplingRate %d,"
1136            "format %d, channels %x, flags %x", stream, samplingRate, format, channelMask, flags);
1137
1138    ALOGV("getOutput() returns output %d", output);
1139
1140    return output;
1141}
1142
1143audio_io_handle_t AudioPolicyManager::selectOutput(const SortedVector<audio_io_handle_t>& outputs,
1144                                                       audio_output_flags_t flags,
1145                                                       audio_format_t format)
1146{
1147    // select one output among several that provide a path to a particular device or set of
1148    // devices (the list was previously build by getOutputsForDevice()).
1149    // The priority is as follows:
1150    // 1: the output with the highest number of requested policy flags
1151    // 2: the primary output
1152    // 3: the first output in the list
1153
1154    if (outputs.size() == 0) {
1155        return 0;
1156    }
1157    if (outputs.size() == 1) {
1158        return outputs[0];
1159    }
1160
1161    int maxCommonFlags = 0;
1162    audio_io_handle_t outputFlags = 0;
1163    audio_io_handle_t outputPrimary = 0;
1164
1165    for (size_t i = 0; i < outputs.size(); i++) {
1166        sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(outputs[i]);
1167        if (!outputDesc->isDuplicated()) {
1168            // if a valid format is specified, skip output if not compatible
1169            if (format != AUDIO_FORMAT_INVALID) {
1170                if (outputDesc->mFlags & AUDIO_OUTPUT_FLAG_DIRECT) {
1171                    if (format != outputDesc->mFormat) {
1172                        continue;
1173                    }
1174                } else if (!audio_is_linear_pcm(format)) {
1175                    continue;
1176                }
1177            }
1178
1179            int commonFlags = popcount(outputDesc->mProfile->mFlags & flags);
1180            if (commonFlags > maxCommonFlags) {
1181                outputFlags = outputs[i];
1182                maxCommonFlags = commonFlags;
1183                ALOGV("selectOutput() commonFlags for output %d, %04x", outputs[i], commonFlags);
1184            }
1185            if (outputDesc->mProfile->mFlags & AUDIO_OUTPUT_FLAG_PRIMARY) {
1186                outputPrimary = outputs[i];
1187            }
1188        }
1189    }
1190
1191    if (outputFlags != 0) {
1192        return outputFlags;
1193    }
1194    if (outputPrimary != 0) {
1195        return outputPrimary;
1196    }
1197
1198    return outputs[0];
1199}
1200
1201status_t AudioPolicyManager::startOutput(audio_io_handle_t output,
1202                                             audio_stream_type_t stream,
1203                                             audio_session_t session)
1204{
1205    ALOGV("startOutput() output %d, stream %d, session %d", output, stream, session);
1206    ssize_t index = mOutputs.indexOfKey(output);
1207    if (index < 0) {
1208        ALOGW("startOutput() unknown output %d", output);
1209        return BAD_VALUE;
1210    }
1211
1212    // cannot start playback of STREAM_TTS if any other output is being used
1213    uint32_t beaconMuteLatency = 0;
1214    if (stream == AUDIO_STREAM_TTS) {
1215        ALOGV("\t found BEACON stream");
1216        if (isAnyOutputActive(AUDIO_STREAM_TTS /*streamToIgnore*/)) {
1217            return INVALID_OPERATION;
1218        } else {
1219            beaconMuteLatency = handleEventForBeacon(STARTING_BEACON);
1220        }
1221    } else {
1222        // some playback other than beacon starts
1223        beaconMuteLatency = handleEventForBeacon(STARTING_OUTPUT);
1224    }
1225
1226    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(index);
1227
1228    // increment usage count for this stream on the requested output:
1229    // NOTE that the usage count is the same for duplicated output and hardware output which is
1230    // necessary for a correct control of hardware output routing by startOutput() and stopOutput()
1231    outputDesc->changeRefCount(stream, 1);
1232
1233    if (outputDesc->mRefCount[stream] == 1) {
1234        // starting an output being rerouted?
1235        audio_devices_t newDevice;
1236        if (outputDesc->mPolicyMix != NULL) {
1237            newDevice = AUDIO_DEVICE_OUT_REMOTE_SUBMIX;
1238        } else {
1239            newDevice = getNewOutputDevice(output, false /*fromCache*/);
1240        }
1241        routing_strategy strategy = getStrategy(stream);
1242        bool shouldWait = (strategy == STRATEGY_SONIFICATION) ||
1243                            (strategy == STRATEGY_SONIFICATION_RESPECTFUL) ||
1244                            (beaconMuteLatency > 0);
1245        uint32_t waitMs = beaconMuteLatency;
1246        bool force = false;
1247        for (size_t i = 0; i < mOutputs.size(); i++) {
1248            sp<AudioOutputDescriptor> desc = mOutputs.valueAt(i);
1249            if (desc != outputDesc) {
1250                // force a device change if any other output is managed by the same hw
1251                // module and has a current device selection that differs from selected device.
1252                // In this case, the audio HAL must receive the new device selection so that it can
1253                // change the device currently selected by the other active output.
1254                if (outputDesc->sharesHwModuleWith(desc) &&
1255                    desc->device() != newDevice) {
1256                    force = true;
1257                }
1258                // wait for audio on other active outputs to be presented when starting
1259                // a notification so that audio focus effect can propagate, or that a mute/unmute
1260                // event occurred for beacon
1261                uint32_t latency = desc->latency();
1262                if (shouldWait && desc->isActive(latency * 2) && (waitMs < latency)) {
1263                    waitMs = latency;
1264                }
1265            }
1266        }
1267        uint32_t muteWaitMs = setOutputDevice(output, newDevice, force);
1268
1269        // handle special case for sonification while in call
1270        if (isInCall()) {
1271            handleIncallSonification(stream, true, false);
1272        }
1273
1274        // apply volume rules for current stream and device if necessary
1275        checkAndSetVolume(stream,
1276                          mStreams[stream].getVolumeIndex(newDevice),
1277                          output,
1278                          newDevice);
1279
1280        // update the outputs if starting an output with a stream that can affect notification
1281        // routing
1282        handleNotificationRoutingForStream(stream);
1283
1284        // Automatically enable the remote submix input when output is started on a re routing mix
1285        // of type MIX_TYPE_RECORDERS
1286        if (audio_is_remote_submix_device(newDevice) && outputDesc->mPolicyMix != NULL &&
1287                outputDesc->mPolicyMix->mMixType == MIX_TYPE_RECORDERS) {
1288                setDeviceConnectionStateInt(AUDIO_DEVICE_IN_REMOTE_SUBMIX,
1289                        AUDIO_POLICY_DEVICE_STATE_AVAILABLE,
1290                        outputDesc->mPolicyMix->mRegistrationId);
1291        }
1292
1293        if (waitMs > muteWaitMs) {
1294            usleep((waitMs - muteWaitMs) * 2 * 1000);
1295        }
1296    }
1297    return NO_ERROR;
1298}
1299
1300
1301status_t AudioPolicyManager::stopOutput(audio_io_handle_t output,
1302                                            audio_stream_type_t stream,
1303                                            audio_session_t session)
1304{
1305    ALOGV("stopOutput() output %d, stream %d, session %d", output, stream, session);
1306    ssize_t index = mOutputs.indexOfKey(output);
1307    if (index < 0) {
1308        ALOGW("stopOutput() unknown output %d", output);
1309        return BAD_VALUE;
1310    }
1311
1312    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(index);
1313
1314    // always handle stream stop, check which stream type is stopping
1315    handleEventForBeacon(stream == AUDIO_STREAM_TTS ? STOPPING_BEACON : STOPPING_OUTPUT);
1316
1317    // handle special case for sonification while in call
1318    if (isInCall()) {
1319        handleIncallSonification(stream, false, false);
1320    }
1321
1322    if (outputDesc->mRefCount[stream] > 0) {
1323        // decrement usage count of this stream on the output
1324        outputDesc->changeRefCount(stream, -1);
1325        // store time at which the stream was stopped - see isStreamActive()
1326        if (outputDesc->mRefCount[stream] == 0) {
1327            // Automatically disable the remote submix input when output is stopped on a
1328            // re routing mix of type MIX_TYPE_RECORDERS
1329            if (audio_is_remote_submix_device(outputDesc->mDevice) &&
1330                    outputDesc->mPolicyMix != NULL &&
1331                    outputDesc->mPolicyMix->mMixType == MIX_TYPE_RECORDERS) {
1332                setDeviceConnectionStateInt(AUDIO_DEVICE_IN_REMOTE_SUBMIX,
1333                        AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE,
1334                        outputDesc->mPolicyMix->mRegistrationId);
1335            }
1336
1337            outputDesc->mStopTime[stream] = systemTime();
1338            audio_devices_t newDevice = getNewOutputDevice(output, false /*fromCache*/);
1339            // delay the device switch by twice the latency because stopOutput() is executed when
1340            // the track stop() command is received and at that time the audio track buffer can
1341            // still contain data that needs to be drained. The latency only covers the audio HAL
1342            // and kernel buffers. Also the latency does not always include additional delay in the
1343            // audio path (audio DSP, CODEC ...)
1344            setOutputDevice(output, newDevice, false, outputDesc->mLatency*2);
1345
1346            // force restoring the device selection on other active outputs if it differs from the
1347            // one being selected for this output
1348            for (size_t i = 0; i < mOutputs.size(); i++) {
1349                audio_io_handle_t curOutput = mOutputs.keyAt(i);
1350                sp<AudioOutputDescriptor> desc = mOutputs.valueAt(i);
1351                if (curOutput != output &&
1352                        desc->isActive() &&
1353                        outputDesc->sharesHwModuleWith(desc) &&
1354                        (newDevice != desc->device())) {
1355                    setOutputDevice(curOutput,
1356                                    getNewOutputDevice(curOutput, false /*fromCache*/),
1357                                    true,
1358                                    outputDesc->mLatency*2);
1359                }
1360            }
1361            // update the outputs if stopping one with a stream that can affect notification routing
1362            handleNotificationRoutingForStream(stream);
1363        }
1364        return NO_ERROR;
1365    } else {
1366        ALOGW("stopOutput() refcount is already 0 for output %d", output);
1367        return INVALID_OPERATION;
1368    }
1369}
1370
1371void AudioPolicyManager::releaseOutput(audio_io_handle_t output,
1372                                       audio_stream_type_t stream __unused,
1373                                       audio_session_t session __unused)
1374{
1375    ALOGV("releaseOutput() %d", output);
1376    ssize_t index = mOutputs.indexOfKey(output);
1377    if (index < 0) {
1378        ALOGW("releaseOutput() releasing unknown output %d", output);
1379        return;
1380    }
1381
1382#ifdef AUDIO_POLICY_TEST
1383    int testIndex = testOutputIndex(output);
1384    if (testIndex != 0) {
1385        sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(index);
1386        if (outputDesc->isActive()) {
1387            mpClientInterface->closeOutput(output);
1388            mOutputs.removeItem(output);
1389            mTestOutputs[testIndex] = 0;
1390        }
1391        return;
1392    }
1393#endif //AUDIO_POLICY_TEST
1394
1395    sp<AudioOutputDescriptor> desc = mOutputs.valueAt(index);
1396    if (desc->mFlags & AUDIO_OUTPUT_FLAG_DIRECT) {
1397        if (desc->mDirectOpenCount <= 0) {
1398            ALOGW("releaseOutput() invalid open count %d for output %d",
1399                                                              desc->mDirectOpenCount, output);
1400            return;
1401        }
1402        if (--desc->mDirectOpenCount == 0) {
1403            closeOutput(output);
1404            // If effects where present on the output, audioflinger moved them to the primary
1405            // output by default: move them back to the appropriate output.
1406            audio_io_handle_t dstOutput = getOutputForEffect();
1407            if (dstOutput != mPrimaryOutput) {
1408                mpClientInterface->moveEffects(AUDIO_SESSION_OUTPUT_MIX, mPrimaryOutput, dstOutput);
1409            }
1410            mpClientInterface->onAudioPortListUpdate();
1411        }
1412    }
1413}
1414
1415
1416status_t AudioPolicyManager::getInputForAttr(const audio_attributes_t *attr,
1417                                             audio_io_handle_t *input,
1418                                             audio_session_t session,
1419                                             uint32_t samplingRate,
1420                                             audio_format_t format,
1421                                             audio_channel_mask_t channelMask,
1422                                             audio_input_flags_t flags,
1423                                             input_type_t *inputType)
1424{
1425    ALOGV("getInputForAttr() source %d, samplingRate %d, format %d, channelMask %x,"
1426            "session %d, flags %#x",
1427          attr->source, samplingRate, format, channelMask, session, flags);
1428
1429    *input = AUDIO_IO_HANDLE_NONE;
1430    *inputType = API_INPUT_INVALID;
1431    audio_devices_t device;
1432    // handle legacy remote submix case where the address was not always specified
1433    String8 address = String8("");
1434    bool isSoundTrigger = false;
1435    audio_source_t halInputSource = attr->source;
1436    AudioMix *policyMix = NULL;
1437
1438    if (attr->source == AUDIO_SOURCE_REMOTE_SUBMIX &&
1439            strncmp(attr->tags, "addr=", strlen("addr=")) == 0) {
1440        device = AUDIO_DEVICE_IN_REMOTE_SUBMIX;
1441        address = String8(attr->tags + strlen("addr="));
1442        ssize_t index = mPolicyMixes.indexOfKey(address);
1443        if (index < 0) {
1444            ALOGW("getInputForAttr() no policy for address %s", address.string());
1445            return BAD_VALUE;
1446        }
1447        if (mPolicyMixes[index]->mMix.mMixType != MIX_TYPE_PLAYERS) {
1448            ALOGW("getInputForAttr() bad policy mix type for address %s", address.string());
1449            return BAD_VALUE;
1450        }
1451        policyMix = &mPolicyMixes[index]->mMix;
1452        *inputType = API_INPUT_MIX_EXT_POLICY_REROUTE;
1453    } else {
1454        device = getDeviceAndMixForInputSource(attr->source, &policyMix);
1455        if (device == AUDIO_DEVICE_NONE) {
1456            ALOGW("getInputForAttr() could not find device for source %d", attr->source);
1457            return BAD_VALUE;
1458        }
1459        if (policyMix != NULL) {
1460            address = policyMix->mRegistrationId;
1461            if (policyMix->mMixType == MIX_TYPE_RECORDERS) {
1462                // there is an external policy, but this input is attached to a mix of recorders,
1463                // meaning it receives audio injected into the framework, so the recorder doesn't
1464                // know about it and is therefore considered "legacy"
1465                *inputType = API_INPUT_LEGACY;
1466            } else {
1467                // recording a mix of players defined by an external policy, we're rerouting for
1468                // an external policy
1469                *inputType = API_INPUT_MIX_EXT_POLICY_REROUTE;
1470            }
1471        } else if (audio_is_remote_submix_device(device)) {
1472            address = String8("0");
1473            *inputType = API_INPUT_MIX_CAPTURE;
1474        } else {
1475            *inputType = API_INPUT_LEGACY;
1476        }
1477        // adapt channel selection to input source
1478        switch (attr->source) {
1479        case AUDIO_SOURCE_VOICE_UPLINK:
1480            channelMask = AUDIO_CHANNEL_IN_VOICE_UPLINK;
1481            break;
1482        case AUDIO_SOURCE_VOICE_DOWNLINK:
1483            channelMask = AUDIO_CHANNEL_IN_VOICE_DNLINK;
1484            break;
1485        case AUDIO_SOURCE_VOICE_CALL:
1486            channelMask = AUDIO_CHANNEL_IN_VOICE_UPLINK | AUDIO_CHANNEL_IN_VOICE_DNLINK;
1487            break;
1488        default:
1489            break;
1490        }
1491        if (attr->source == AUDIO_SOURCE_HOTWORD) {
1492            ssize_t index = mSoundTriggerSessions.indexOfKey(session);
1493            if (index >= 0) {
1494                *input = mSoundTriggerSessions.valueFor(session);
1495                isSoundTrigger = true;
1496                flags = (audio_input_flags_t)(flags | AUDIO_INPUT_FLAG_HW_HOTWORD);
1497                ALOGV("SoundTrigger capture on session %d input %d", session, *input);
1498            } else {
1499                halInputSource = AUDIO_SOURCE_VOICE_RECOGNITION;
1500            }
1501        }
1502    }
1503
1504    sp<IOProfile> profile = getInputProfile(device, address,
1505                                            samplingRate, format, channelMask,
1506                                            flags);
1507    if (profile == 0) {
1508        //retry without flags
1509        audio_input_flags_t log_flags = flags;
1510        flags = AUDIO_INPUT_FLAG_NONE;
1511        profile = getInputProfile(device, address,
1512                                  samplingRate, format, channelMask,
1513                                  flags);
1514        if (profile == 0) {
1515            ALOGW("getInputForAttr() could not find profile for device 0x%X, samplingRate %u,"
1516                    "format %#x, channelMask 0x%X, flags %#x",
1517                    device, samplingRate, format, channelMask, log_flags);
1518            return BAD_VALUE;
1519        }
1520    }
1521
1522    if (profile->mModule->mHandle == 0) {
1523        ALOGE("getInputForAttr(): HW module %s not opened", profile->mModule->mName);
1524        return NO_INIT;
1525    }
1526
1527    audio_config_t config = AUDIO_CONFIG_INITIALIZER;
1528    config.sample_rate = samplingRate;
1529    config.channel_mask = channelMask;
1530    config.format = format;
1531
1532    status_t status = mpClientInterface->openInput(profile->mModule->mHandle,
1533                                                   input,
1534                                                   &config,
1535                                                   &device,
1536                                                   address,
1537                                                   halInputSource,
1538                                                   flags);
1539
1540    // only accept input with the exact requested set of parameters
1541    if (status != NO_ERROR || *input == AUDIO_IO_HANDLE_NONE ||
1542        (samplingRate != config.sample_rate) ||
1543        (format != config.format) ||
1544        (channelMask != config.channel_mask)) {
1545        ALOGW("getInputForAttr() failed opening input: samplingRate %d, format %d, channelMask %x",
1546                samplingRate, format, channelMask);
1547        if (*input != AUDIO_IO_HANDLE_NONE) {
1548            mpClientInterface->closeInput(*input);
1549        }
1550        return BAD_VALUE;
1551    }
1552
1553    sp<AudioInputDescriptor> inputDesc = new AudioInputDescriptor(profile);
1554    inputDesc->mInputSource = attr->source;
1555    inputDesc->mRefCount = 0;
1556    inputDesc->mOpenRefCount = 1;
1557    inputDesc->mSamplingRate = samplingRate;
1558    inputDesc->mFormat = format;
1559    inputDesc->mChannelMask = channelMask;
1560    inputDesc->mDevice = device;
1561    inputDesc->mSessions.add(session);
1562    inputDesc->mIsSoundTrigger = isSoundTrigger;
1563    inputDesc->mPolicyMix = policyMix;
1564
1565    ALOGV("getInputForAttr() returns input type = %d", inputType);
1566
1567    addInput(*input, inputDesc);
1568    mpClientInterface->onAudioPortListUpdate();
1569    return NO_ERROR;
1570}
1571
1572status_t AudioPolicyManager::startInput(audio_io_handle_t input,
1573                                        audio_session_t session)
1574{
1575    ALOGV("startInput() input %d", input);
1576    ssize_t index = mInputs.indexOfKey(input);
1577    if (index < 0) {
1578        ALOGW("startInput() unknown input %d", input);
1579        return BAD_VALUE;
1580    }
1581    sp<AudioInputDescriptor> inputDesc = mInputs.valueAt(index);
1582
1583    index = inputDesc->mSessions.indexOf(session);
1584    if (index < 0) {
1585        ALOGW("startInput() unknown session %d on input %d", session, input);
1586        return BAD_VALUE;
1587    }
1588
1589    // virtual input devices are compatible with other input devices
1590    if (!isVirtualInputDevice(inputDesc->mDevice)) {
1591
1592        // for a non-virtual input device, check if there is another (non-virtual) active input
1593        audio_io_handle_t activeInput = getActiveInput();
1594        if (activeInput != 0 && activeInput != input) {
1595
1596            // If the already active input uses AUDIO_SOURCE_HOTWORD then it is closed,
1597            // otherwise the active input continues and the new input cannot be started.
1598            sp<AudioInputDescriptor> activeDesc = mInputs.valueFor(activeInput);
1599            if (activeDesc->mInputSource == AUDIO_SOURCE_HOTWORD) {
1600                ALOGW("startInput(%d) preempting low-priority input %d", input, activeInput);
1601                stopInput(activeInput, activeDesc->mSessions.itemAt(0));
1602                releaseInput(activeInput, activeDesc->mSessions.itemAt(0));
1603            } else {
1604                ALOGE("startInput(%d) failed: other input %d already started", input, activeInput);
1605                return INVALID_OPERATION;
1606            }
1607        }
1608    }
1609
1610    if (inputDesc->mRefCount == 0) {
1611        if (activeInputsCount() == 0) {
1612            SoundTrigger::setCaptureState(true);
1613        }
1614        setInputDevice(input, getNewInputDevice(input), true /* force */);
1615
1616        // automatically enable the remote submix output when input is started if not
1617        // used by a policy mix of type MIX_TYPE_RECORDERS
1618        // For remote submix (a virtual device), we open only one input per capture request.
1619        if (audio_is_remote_submix_device(inputDesc->mDevice)) {
1620            String8 address = String8("");
1621            if (inputDesc->mPolicyMix == NULL) {
1622                address = String8("0");
1623            } else if (inputDesc->mPolicyMix->mMixType == MIX_TYPE_PLAYERS) {
1624                address = inputDesc->mPolicyMix->mRegistrationId;
1625            }
1626            if (address != "") {
1627                setDeviceConnectionStateInt(AUDIO_DEVICE_OUT_REMOTE_SUBMIX,
1628                        AUDIO_POLICY_DEVICE_STATE_AVAILABLE,
1629                        address);
1630            }
1631        }
1632    }
1633
1634    ALOGV("AudioPolicyManager::startInput() input source = %d", inputDesc->mInputSource);
1635
1636    inputDesc->mRefCount++;
1637    return NO_ERROR;
1638}
1639
1640status_t AudioPolicyManager::stopInput(audio_io_handle_t input,
1641                                       audio_session_t session)
1642{
1643    ALOGV("stopInput() input %d", input);
1644    ssize_t index = mInputs.indexOfKey(input);
1645    if (index < 0) {
1646        ALOGW("stopInput() unknown input %d", input);
1647        return BAD_VALUE;
1648    }
1649    sp<AudioInputDescriptor> inputDesc = mInputs.valueAt(index);
1650
1651    index = inputDesc->mSessions.indexOf(session);
1652    if (index < 0) {
1653        ALOGW("stopInput() unknown session %d on input %d", session, input);
1654        return BAD_VALUE;
1655    }
1656
1657    if (inputDesc->mRefCount == 0) {
1658        ALOGW("stopInput() input %d already stopped", input);
1659        return INVALID_OPERATION;
1660    }
1661
1662    inputDesc->mRefCount--;
1663    if (inputDesc->mRefCount == 0) {
1664
1665        // automatically disable the remote submix output when input is stopped if not
1666        // used by a policy mix of type MIX_TYPE_RECORDERS
1667        if (audio_is_remote_submix_device(inputDesc->mDevice)) {
1668            String8 address = String8("");
1669            if (inputDesc->mPolicyMix == NULL) {
1670                address = String8("0");
1671            } else if (inputDesc->mPolicyMix->mMixType == MIX_TYPE_PLAYERS) {
1672                address = inputDesc->mPolicyMix->mRegistrationId;
1673            }
1674            if (address != "") {
1675                setDeviceConnectionStateInt(AUDIO_DEVICE_OUT_REMOTE_SUBMIX,
1676                                         AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE,
1677                                         address);
1678            }
1679        }
1680
1681        resetInputDevice(input);
1682
1683        if (activeInputsCount() == 0) {
1684            SoundTrigger::setCaptureState(false);
1685        }
1686    }
1687    return NO_ERROR;
1688}
1689
1690void AudioPolicyManager::releaseInput(audio_io_handle_t input,
1691                                      audio_session_t session)
1692{
1693    ALOGV("releaseInput() %d", input);
1694    ssize_t index = mInputs.indexOfKey(input);
1695    if (index < 0) {
1696        ALOGW("releaseInput() releasing unknown input %d", input);
1697        return;
1698    }
1699    sp<AudioInputDescriptor> inputDesc = mInputs.valueAt(index);
1700    ALOG_ASSERT(inputDesc != 0);
1701
1702    index = inputDesc->mSessions.indexOf(session);
1703    if (index < 0) {
1704        ALOGW("releaseInput() unknown session %d on input %d", session, input);
1705        return;
1706    }
1707    inputDesc->mSessions.remove(session);
1708    if (inputDesc->mOpenRefCount == 0) {
1709        ALOGW("releaseInput() invalid open ref count %d", inputDesc->mOpenRefCount);
1710        return;
1711    }
1712    inputDesc->mOpenRefCount--;
1713    if (inputDesc->mOpenRefCount > 0) {
1714        ALOGV("releaseInput() exit > 0");
1715        return;
1716    }
1717
1718    closeInput(input);
1719    mpClientInterface->onAudioPortListUpdate();
1720    ALOGV("releaseInput() exit");
1721}
1722
1723void AudioPolicyManager::closeAllInputs() {
1724    bool patchRemoved = false;
1725
1726    for(size_t input_index = 0; input_index < mInputs.size(); input_index++) {
1727        sp<AudioInputDescriptor> inputDesc = mInputs.valueAt(input_index);
1728        ssize_t patch_index = mAudioPatches.indexOfKey(inputDesc->mPatchHandle);
1729        if (patch_index >= 0) {
1730            sp<AudioPatch> patchDesc = mAudioPatches.valueAt(patch_index);
1731            status_t status = mpClientInterface->releaseAudioPatch(patchDesc->mAfPatchHandle, 0);
1732            mAudioPatches.removeItemsAt(patch_index);
1733            patchRemoved = true;
1734        }
1735        mpClientInterface->closeInput(mInputs.keyAt(input_index));
1736    }
1737    mInputs.clear();
1738    nextAudioPortGeneration();
1739
1740    if (patchRemoved) {
1741        mpClientInterface->onAudioPatchListUpdate();
1742    }
1743}
1744
1745void AudioPolicyManager::initStreamVolume(audio_stream_type_t stream,
1746                                            int indexMin,
1747                                            int indexMax)
1748{
1749    ALOGV("initStreamVolume() stream %d, min %d, max %d", stream , indexMin, indexMax);
1750    if (indexMin < 0 || indexMin >= indexMax) {
1751        ALOGW("initStreamVolume() invalid index limits for stream %d, min %d, max %d", stream , indexMin, indexMax);
1752        return;
1753    }
1754    mStreams[stream].mIndexMin = indexMin;
1755    mStreams[stream].mIndexMax = indexMax;
1756    //FIXME: AUDIO_STREAM_ACCESSIBILITY volume follows AUDIO_STREAM_MUSIC for now
1757    if (stream == AUDIO_STREAM_MUSIC) {
1758        mStreams[AUDIO_STREAM_ACCESSIBILITY].mIndexMin = indexMin;
1759        mStreams[AUDIO_STREAM_ACCESSIBILITY].mIndexMax = indexMax;
1760    }
1761}
1762
1763status_t AudioPolicyManager::setStreamVolumeIndex(audio_stream_type_t stream,
1764                                                      int index,
1765                                                      audio_devices_t device)
1766{
1767
1768    if ((index < mStreams[stream].mIndexMin) || (index > mStreams[stream].mIndexMax)) {
1769        return BAD_VALUE;
1770    }
1771    if (!audio_is_output_device(device)) {
1772        return BAD_VALUE;
1773    }
1774
1775    // Force max volume if stream cannot be muted
1776    if (!mStreams[stream].mCanBeMuted) index = mStreams[stream].mIndexMax;
1777
1778    ALOGV("setStreamVolumeIndex() stream %d, device %04x, index %d",
1779          stream, device, index);
1780
1781    // if device is AUDIO_DEVICE_OUT_DEFAULT set default value and
1782    // clear all device specific values
1783    if (device == AUDIO_DEVICE_OUT_DEFAULT) {
1784        mStreams[stream].mIndexCur.clear();
1785    }
1786    mStreams[stream].mIndexCur.add(device, index);
1787
1788    // update volume on all outputs whose current device is also selected by the same
1789    // strategy as the device specified by the caller
1790    audio_devices_t strategyDevice = getDeviceForStrategy(getStrategy(stream), true /*fromCache*/);
1791
1792
1793    //FIXME: AUDIO_STREAM_ACCESSIBILITY volume follows AUDIO_STREAM_MUSIC for now
1794    audio_devices_t accessibilityDevice = AUDIO_DEVICE_NONE;
1795    if (stream == AUDIO_STREAM_MUSIC) {
1796        mStreams[AUDIO_STREAM_ACCESSIBILITY].mIndexCur.add(device, index);
1797        accessibilityDevice = getDeviceForStrategy(STRATEGY_ACCESSIBILITY, true /*fromCache*/);
1798    }
1799    if ((device != AUDIO_DEVICE_OUT_DEFAULT) &&
1800            (device & (strategyDevice | accessibilityDevice)) == 0) {
1801        return NO_ERROR;
1802    }
1803    status_t status = NO_ERROR;
1804    for (size_t i = 0; i < mOutputs.size(); i++) {
1805        audio_devices_t curDevice =
1806                getDeviceForVolume(mOutputs.valueAt(i)->device());
1807        if ((device == AUDIO_DEVICE_OUT_DEFAULT) || ((curDevice & strategyDevice) != 0)) {
1808            status_t volStatus = checkAndSetVolume(stream, index, mOutputs.keyAt(i), curDevice);
1809            if (volStatus != NO_ERROR) {
1810                status = volStatus;
1811            }
1812        }
1813        if ((device == AUDIO_DEVICE_OUT_DEFAULT) || ((curDevice & accessibilityDevice) != 0)) {
1814            status_t volStatus = checkAndSetVolume(AUDIO_STREAM_ACCESSIBILITY,
1815                                                   index, mOutputs.keyAt(i), curDevice);
1816        }
1817    }
1818    return status;
1819}
1820
1821status_t AudioPolicyManager::getStreamVolumeIndex(audio_stream_type_t stream,
1822                                                      int *index,
1823                                                      audio_devices_t device)
1824{
1825    if (index == NULL) {
1826        return BAD_VALUE;
1827    }
1828    if (!audio_is_output_device(device)) {
1829        return BAD_VALUE;
1830    }
1831    // if device is AUDIO_DEVICE_OUT_DEFAULT, return volume for device corresponding to
1832    // the strategy the stream belongs to.
1833    if (device == AUDIO_DEVICE_OUT_DEFAULT) {
1834        device = getDeviceForStrategy(getStrategy(stream), true /*fromCache*/);
1835    }
1836    device = getDeviceForVolume(device);
1837
1838    *index =  mStreams[stream].getVolumeIndex(device);
1839    ALOGV("getStreamVolumeIndex() stream %d device %08x index %d", stream, device, *index);
1840    return NO_ERROR;
1841}
1842
1843audio_io_handle_t AudioPolicyManager::selectOutputForEffects(
1844                                            const SortedVector<audio_io_handle_t>& outputs)
1845{
1846    // select one output among several suitable for global effects.
1847    // The priority is as follows:
1848    // 1: An offloaded output. If the effect ends up not being offloadable,
1849    //    AudioFlinger will invalidate the track and the offloaded output
1850    //    will be closed causing the effect to be moved to a PCM output.
1851    // 2: A deep buffer output
1852    // 3: the first output in the list
1853
1854    if (outputs.size() == 0) {
1855        return 0;
1856    }
1857
1858    audio_io_handle_t outputOffloaded = 0;
1859    audio_io_handle_t outputDeepBuffer = 0;
1860
1861    for (size_t i = 0; i < outputs.size(); i++) {
1862        sp<AudioOutputDescriptor> desc = mOutputs.valueFor(outputs[i]);
1863        ALOGV("selectOutputForEffects outputs[%zu] flags %x", i, desc->mFlags);
1864        if ((desc->mFlags & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) != 0) {
1865            outputOffloaded = outputs[i];
1866        }
1867        if ((desc->mFlags & AUDIO_OUTPUT_FLAG_DEEP_BUFFER) != 0) {
1868            outputDeepBuffer = outputs[i];
1869        }
1870    }
1871
1872    ALOGV("selectOutputForEffects outputOffloaded %d outputDeepBuffer %d",
1873          outputOffloaded, outputDeepBuffer);
1874    if (outputOffloaded != 0) {
1875        return outputOffloaded;
1876    }
1877    if (outputDeepBuffer != 0) {
1878        return outputDeepBuffer;
1879    }
1880
1881    return outputs[0];
1882}
1883
1884audio_io_handle_t AudioPolicyManager::getOutputForEffect(const effect_descriptor_t *desc)
1885{
1886    // apply simple rule where global effects are attached to the same output as MUSIC streams
1887
1888    routing_strategy strategy = getStrategy(AUDIO_STREAM_MUSIC);
1889    audio_devices_t device = getDeviceForStrategy(strategy, false /*fromCache*/);
1890    SortedVector<audio_io_handle_t> dstOutputs = getOutputsForDevice(device, mOutputs);
1891
1892    audio_io_handle_t output = selectOutputForEffects(dstOutputs);
1893    ALOGV("getOutputForEffect() got output %d for fx %s flags %x",
1894          output, (desc == NULL) ? "unspecified" : desc->name,  (desc == NULL) ? 0 : desc->flags);
1895
1896    return output;
1897}
1898
1899status_t AudioPolicyManager::registerEffect(const effect_descriptor_t *desc,
1900                                audio_io_handle_t io,
1901                                uint32_t strategy,
1902                                int session,
1903                                int id)
1904{
1905    ssize_t index = mOutputs.indexOfKey(io);
1906    if (index < 0) {
1907        index = mInputs.indexOfKey(io);
1908        if (index < 0) {
1909            ALOGW("registerEffect() unknown io %d", io);
1910            return INVALID_OPERATION;
1911        }
1912    }
1913
1914    if (mTotalEffectsMemory + desc->memoryUsage > getMaxEffectsMemory()) {
1915        ALOGW("registerEffect() memory limit exceeded for Fx %s, Memory %d KB",
1916                desc->name, desc->memoryUsage);
1917        return INVALID_OPERATION;
1918    }
1919    mTotalEffectsMemory += desc->memoryUsage;
1920    ALOGV("registerEffect() effect %s, io %d, strategy %d session %d id %d",
1921            desc->name, io, strategy, session, id);
1922    ALOGV("registerEffect() memory %d, total memory %d", desc->memoryUsage, mTotalEffectsMemory);
1923
1924    sp<EffectDescriptor> effectDesc = new EffectDescriptor();
1925    memcpy (&effectDesc->mDesc, desc, sizeof(effect_descriptor_t));
1926    effectDesc->mIo = io;
1927    effectDesc->mStrategy = (routing_strategy)strategy;
1928    effectDesc->mSession = session;
1929    effectDesc->mEnabled = false;
1930
1931    mEffects.add(id, effectDesc);
1932
1933    return NO_ERROR;
1934}
1935
1936status_t AudioPolicyManager::unregisterEffect(int id)
1937{
1938    ssize_t index = mEffects.indexOfKey(id);
1939    if (index < 0) {
1940        ALOGW("unregisterEffect() unknown effect ID %d", id);
1941        return INVALID_OPERATION;
1942    }
1943
1944    sp<EffectDescriptor> effectDesc = mEffects.valueAt(index);
1945
1946    setEffectEnabled(effectDesc, false);
1947
1948    if (mTotalEffectsMemory < effectDesc->mDesc.memoryUsage) {
1949        ALOGW("unregisterEffect() memory %d too big for total %d",
1950                effectDesc->mDesc.memoryUsage, mTotalEffectsMemory);
1951        effectDesc->mDesc.memoryUsage = mTotalEffectsMemory;
1952    }
1953    mTotalEffectsMemory -= effectDesc->mDesc.memoryUsage;
1954    ALOGV("unregisterEffect() effect %s, ID %d, memory %d total memory %d",
1955            effectDesc->mDesc.name, id, effectDesc->mDesc.memoryUsage, mTotalEffectsMemory);
1956
1957    mEffects.removeItem(id);
1958
1959    return NO_ERROR;
1960}
1961
1962status_t AudioPolicyManager::setEffectEnabled(int id, bool enabled)
1963{
1964    ssize_t index = mEffects.indexOfKey(id);
1965    if (index < 0) {
1966        ALOGW("unregisterEffect() unknown effect ID %d", id);
1967        return INVALID_OPERATION;
1968    }
1969
1970    return setEffectEnabled(mEffects.valueAt(index), enabled);
1971}
1972
1973status_t AudioPolicyManager::setEffectEnabled(const sp<EffectDescriptor>& effectDesc, bool enabled)
1974{
1975    if (enabled == effectDesc->mEnabled) {
1976        ALOGV("setEffectEnabled(%s) effect already %s",
1977             enabled?"true":"false", enabled?"enabled":"disabled");
1978        return INVALID_OPERATION;
1979    }
1980
1981    if (enabled) {
1982        if (mTotalEffectsCpuLoad + effectDesc->mDesc.cpuLoad > getMaxEffectsCpuLoad()) {
1983            ALOGW("setEffectEnabled(true) CPU Load limit exceeded for Fx %s, CPU %f MIPS",
1984                 effectDesc->mDesc.name, (float)effectDesc->mDesc.cpuLoad/10);
1985            return INVALID_OPERATION;
1986        }
1987        mTotalEffectsCpuLoad += effectDesc->mDesc.cpuLoad;
1988        ALOGV("setEffectEnabled(true) total CPU %d", mTotalEffectsCpuLoad);
1989    } else {
1990        if (mTotalEffectsCpuLoad < effectDesc->mDesc.cpuLoad) {
1991            ALOGW("setEffectEnabled(false) CPU load %d too high for total %d",
1992                    effectDesc->mDesc.cpuLoad, mTotalEffectsCpuLoad);
1993            effectDesc->mDesc.cpuLoad = mTotalEffectsCpuLoad;
1994        }
1995        mTotalEffectsCpuLoad -= effectDesc->mDesc.cpuLoad;
1996        ALOGV("setEffectEnabled(false) total CPU %d", mTotalEffectsCpuLoad);
1997    }
1998    effectDesc->mEnabled = enabled;
1999    return NO_ERROR;
2000}
2001
2002bool AudioPolicyManager::isNonOffloadableEffectEnabled()
2003{
2004    for (size_t i = 0; i < mEffects.size(); i++) {
2005        sp<EffectDescriptor> effectDesc = mEffects.valueAt(i);
2006        if (effectDesc->mEnabled && (effectDesc->mStrategy == STRATEGY_MEDIA) &&
2007                ((effectDesc->mDesc.flags & EFFECT_FLAG_OFFLOAD_SUPPORTED) == 0)) {
2008            ALOGV("isNonOffloadableEffectEnabled() non offloadable effect %s enabled on session %d",
2009                  effectDesc->mDesc.name, effectDesc->mSession);
2010            return true;
2011        }
2012    }
2013    return false;
2014}
2015
2016bool AudioPolicyManager::isStreamActive(audio_stream_type_t stream, uint32_t inPastMs) const
2017{
2018    nsecs_t sysTime = systemTime();
2019    for (size_t i = 0; i < mOutputs.size(); i++) {
2020        const sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(i);
2021        if (outputDesc->isStreamActive(stream, inPastMs, sysTime)) {
2022            return true;
2023        }
2024    }
2025    return false;
2026}
2027
2028bool AudioPolicyManager::isStreamActiveRemotely(audio_stream_type_t stream,
2029                                                    uint32_t inPastMs) const
2030{
2031    nsecs_t sysTime = systemTime();
2032    for (size_t i = 0; i < mOutputs.size(); i++) {
2033        const sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(i);
2034        if (((outputDesc->device() & APM_AUDIO_OUT_DEVICE_REMOTE_ALL) != 0) &&
2035                outputDesc->isStreamActive(stream, inPastMs, sysTime)) {
2036            // do not consider re routing (when the output is going to a dynamic policy)
2037            // as "remote playback"
2038            if (outputDesc->mPolicyMix == NULL) {
2039                return true;
2040            }
2041        }
2042    }
2043    return false;
2044}
2045
2046bool AudioPolicyManager::isSourceActive(audio_source_t source) const
2047{
2048    for (size_t i = 0; i < mInputs.size(); i++) {
2049        const sp<AudioInputDescriptor>  inputDescriptor = mInputs.valueAt(i);
2050        if ((inputDescriptor->mInputSource == (int)source ||
2051                (source == AUDIO_SOURCE_VOICE_RECOGNITION &&
2052                 inputDescriptor->mInputSource == AUDIO_SOURCE_HOTWORD))
2053             && (inputDescriptor->mRefCount > 0)) {
2054            return true;
2055        }
2056    }
2057    return false;
2058}
2059
2060// Register a list of custom mixes with their attributes and format.
2061// When a mix is registered, corresponding input and output profiles are
2062// added to the remote submix hw module. The profile contains only the
2063// parameters (sampling rate, format...) specified by the mix.
2064// The corresponding input remote submix device is also connected.
2065//
2066// When a remote submix device is connected, the address is checked to select the
2067// appropriate profile and the corresponding input or output stream is opened.
2068//
2069// When capture starts, getInputForAttr() will:
2070//  - 1 look for a mix matching the address passed in attribtutes tags if any
2071//  - 2 if none found, getDeviceForInputSource() will:
2072//     - 2.1 look for a mix matching the attributes source
2073//     - 2.2 if none found, default to device selection by policy rules
2074// At this time, the corresponding output remote submix device is also connected
2075// and active playback use cases can be transferred to this mix if needed when reconnecting
2076// after AudioTracks are invalidated
2077//
2078// When playback starts, getOutputForAttr() will:
2079//  - 1 look for a mix matching the address passed in attribtutes tags if any
2080//  - 2 if none found, look for a mix matching the attributes usage
2081//  - 3 if none found, default to device and output selection by policy rules.
2082
2083status_t AudioPolicyManager::registerPolicyMixes(Vector<AudioMix> mixes)
2084{
2085    sp<HwModule> module;
2086    for (size_t i = 0; i < mHwModules.size(); i++) {
2087        if (strcmp(AUDIO_HARDWARE_MODULE_ID_REMOTE_SUBMIX, mHwModules[i]->mName) == 0 &&
2088                mHwModules[i]->mHandle != 0) {
2089            module = mHwModules[i];
2090            break;
2091        }
2092    }
2093
2094    if (module == 0) {
2095        return INVALID_OPERATION;
2096    }
2097
2098    ALOGV("registerPolicyMixes() num mixes %d", mixes.size());
2099
2100    for (size_t i = 0; i < mixes.size(); i++) {
2101        String8 address = mixes[i].mRegistrationId;
2102        ssize_t index = mPolicyMixes.indexOfKey(address);
2103        if (index >= 0) {
2104            ALOGE("registerPolicyMixes(): mix for address %s already registered", address.string());
2105            continue;
2106        }
2107        audio_config_t outputConfig = mixes[i].mFormat;
2108        audio_config_t inputConfig = mixes[i].mFormat;
2109        // NOTE: audio flinger mixer does not support mono output: configure remote submix HAL in
2110        // stereo and let audio flinger do the channel conversion if needed.
2111        outputConfig.channel_mask = AUDIO_CHANNEL_OUT_STEREO;
2112        inputConfig.channel_mask = AUDIO_CHANNEL_IN_STEREO;
2113        module->addOutputProfile(address, &outputConfig,
2114                                 AUDIO_DEVICE_OUT_REMOTE_SUBMIX, address);
2115        module->addInputProfile(address, &inputConfig,
2116                                 AUDIO_DEVICE_IN_REMOTE_SUBMIX, address);
2117        sp<AudioPolicyMix> policyMix = new AudioPolicyMix();
2118        policyMix->mMix = mixes[i];
2119        mPolicyMixes.add(address, policyMix);
2120        if (mixes[i].mMixType == MIX_TYPE_PLAYERS) {
2121            setDeviceConnectionStateInt(AUDIO_DEVICE_IN_REMOTE_SUBMIX,
2122                                     AUDIO_POLICY_DEVICE_STATE_AVAILABLE,
2123                                     address.string());
2124        } else {
2125            setDeviceConnectionStateInt(AUDIO_DEVICE_OUT_REMOTE_SUBMIX,
2126                                     AUDIO_POLICY_DEVICE_STATE_AVAILABLE,
2127                                     address.string());
2128        }
2129    }
2130    return NO_ERROR;
2131}
2132
2133status_t AudioPolicyManager::unregisterPolicyMixes(Vector<AudioMix> mixes)
2134{
2135    sp<HwModule> module;
2136    for (size_t i = 0; i < mHwModules.size(); i++) {
2137        if (strcmp(AUDIO_HARDWARE_MODULE_ID_REMOTE_SUBMIX, mHwModules[i]->mName) == 0 &&
2138                mHwModules[i]->mHandle != 0) {
2139            module = mHwModules[i];
2140            break;
2141        }
2142    }
2143
2144    if (module == 0) {
2145        return INVALID_OPERATION;
2146    }
2147
2148    ALOGV("unregisterPolicyMixes() num mixes %d", mixes.size());
2149
2150    for (size_t i = 0; i < mixes.size(); i++) {
2151        String8 address = mixes[i].mRegistrationId;
2152        ssize_t index = mPolicyMixes.indexOfKey(address);
2153        if (index < 0) {
2154            ALOGE("unregisterPolicyMixes(): mix for address %s not registered", address.string());
2155            continue;
2156        }
2157
2158        mPolicyMixes.removeItemsAt(index);
2159
2160        if (getDeviceConnectionState(AUDIO_DEVICE_IN_REMOTE_SUBMIX, address.string()) ==
2161                                             AUDIO_POLICY_DEVICE_STATE_AVAILABLE)
2162        {
2163            setDeviceConnectionStateInt(AUDIO_DEVICE_IN_REMOTE_SUBMIX,
2164                                     AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE,
2165                                     address.string());
2166        }
2167
2168        if (getDeviceConnectionState(AUDIO_DEVICE_OUT_REMOTE_SUBMIX, address.string()) ==
2169                                             AUDIO_POLICY_DEVICE_STATE_AVAILABLE)
2170        {
2171            setDeviceConnectionStateInt(AUDIO_DEVICE_OUT_REMOTE_SUBMIX,
2172                                     AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE,
2173                                     address.string());
2174        }
2175        module->removeOutputProfile(address);
2176        module->removeInputProfile(address);
2177    }
2178    return NO_ERROR;
2179}
2180
2181
2182status_t AudioPolicyManager::dump(int fd)
2183{
2184    const size_t SIZE = 256;
2185    char buffer[SIZE];
2186    String8 result;
2187
2188    snprintf(buffer, SIZE, "\nAudioPolicyManager Dump: %p\n", this);
2189    result.append(buffer);
2190
2191    snprintf(buffer, SIZE, " Primary Output: %d\n", mPrimaryOutput);
2192    result.append(buffer);
2193    snprintf(buffer, SIZE, " Phone state: %d\n", mPhoneState);
2194    result.append(buffer);
2195    snprintf(buffer, SIZE, " Force use for communications %d\n",
2196             mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION]);
2197    result.append(buffer);
2198    snprintf(buffer, SIZE, " Force use for media %d\n", mForceUse[AUDIO_POLICY_FORCE_FOR_MEDIA]);
2199    result.append(buffer);
2200    snprintf(buffer, SIZE, " Force use for record %d\n", mForceUse[AUDIO_POLICY_FORCE_FOR_RECORD]);
2201    result.append(buffer);
2202    snprintf(buffer, SIZE, " Force use for dock %d\n", mForceUse[AUDIO_POLICY_FORCE_FOR_DOCK]);
2203    result.append(buffer);
2204    snprintf(buffer, SIZE, " Force use for system %d\n", mForceUse[AUDIO_POLICY_FORCE_FOR_SYSTEM]);
2205    result.append(buffer);
2206    snprintf(buffer, SIZE, " Force use for hdmi system audio %d\n",
2207            mForceUse[AUDIO_POLICY_FORCE_FOR_HDMI_SYSTEM_AUDIO]);
2208    result.append(buffer);
2209
2210    snprintf(buffer, SIZE, " Available output devices:\n");
2211    result.append(buffer);
2212    write(fd, result.string(), result.size());
2213    for (size_t i = 0; i < mAvailableOutputDevices.size(); i++) {
2214        mAvailableOutputDevices[i]->dump(fd, 2, i);
2215    }
2216    snprintf(buffer, SIZE, "\n Available input devices:\n");
2217    write(fd, buffer, strlen(buffer));
2218    for (size_t i = 0; i < mAvailableInputDevices.size(); i++) {
2219        mAvailableInputDevices[i]->dump(fd, 2, i);
2220    }
2221
2222    snprintf(buffer, SIZE, "\nHW Modules dump:\n");
2223    write(fd, buffer, strlen(buffer));
2224    for (size_t i = 0; i < mHwModules.size(); i++) {
2225        snprintf(buffer, SIZE, "- HW Module %zu:\n", i + 1);
2226        write(fd, buffer, strlen(buffer));
2227        mHwModules[i]->dump(fd);
2228    }
2229
2230    snprintf(buffer, SIZE, "\nOutputs dump:\n");
2231    write(fd, buffer, strlen(buffer));
2232    for (size_t i = 0; i < mOutputs.size(); i++) {
2233        snprintf(buffer, SIZE, "- Output %d dump:\n", mOutputs.keyAt(i));
2234        write(fd, buffer, strlen(buffer));
2235        mOutputs.valueAt(i)->dump(fd);
2236    }
2237
2238    snprintf(buffer, SIZE, "\nInputs dump:\n");
2239    write(fd, buffer, strlen(buffer));
2240    for (size_t i = 0; i < mInputs.size(); i++) {
2241        snprintf(buffer, SIZE, "- Input %d dump:\n", mInputs.keyAt(i));
2242        write(fd, buffer, strlen(buffer));
2243        mInputs.valueAt(i)->dump(fd);
2244    }
2245
2246    snprintf(buffer, SIZE, "\nStreams dump:\n");
2247    write(fd, buffer, strlen(buffer));
2248    snprintf(buffer, SIZE,
2249             " Stream  Can be muted  Index Min  Index Max  Index Cur [device : index]...\n");
2250    write(fd, buffer, strlen(buffer));
2251    for (size_t i = 0; i < AUDIO_STREAM_CNT; i++) {
2252        snprintf(buffer, SIZE, " %02zu      ", i);
2253        write(fd, buffer, strlen(buffer));
2254        mStreams[i].dump(fd);
2255    }
2256
2257    snprintf(buffer, SIZE, "\nTotal Effects CPU: %f MIPS, Total Effects memory: %d KB\n",
2258            (float)mTotalEffectsCpuLoad/10, mTotalEffectsMemory);
2259    write(fd, buffer, strlen(buffer));
2260
2261    snprintf(buffer, SIZE, "Registered effects:\n");
2262    write(fd, buffer, strlen(buffer));
2263    for (size_t i = 0; i < mEffects.size(); i++) {
2264        snprintf(buffer, SIZE, "- Effect %d dump:\n", mEffects.keyAt(i));
2265        write(fd, buffer, strlen(buffer));
2266        mEffects.valueAt(i)->dump(fd);
2267    }
2268
2269    snprintf(buffer, SIZE, "\nAudio Patches:\n");
2270    write(fd, buffer, strlen(buffer));
2271    for (size_t i = 0; i < mAudioPatches.size(); i++) {
2272        mAudioPatches[i]->dump(fd, 2, i);
2273    }
2274
2275    return NO_ERROR;
2276}
2277
2278// This function checks for the parameters which can be offloaded.
2279// This can be enhanced depending on the capability of the DSP and policy
2280// of the system.
2281bool AudioPolicyManager::isOffloadSupported(const audio_offload_info_t& offloadInfo)
2282{
2283    ALOGV("isOffloadSupported: SR=%u, CM=0x%x, Format=0x%x, StreamType=%d,"
2284     " BitRate=%u, duration=%" PRId64 " us, has_video=%d",
2285     offloadInfo.sample_rate, offloadInfo.channel_mask,
2286     offloadInfo.format,
2287     offloadInfo.stream_type, offloadInfo.bit_rate, offloadInfo.duration_us,
2288     offloadInfo.has_video);
2289
2290    // Check if offload has been disabled
2291    char propValue[PROPERTY_VALUE_MAX];
2292    if (property_get("audio.offload.disable", propValue, "0")) {
2293        if (atoi(propValue) != 0) {
2294            ALOGV("offload disabled by audio.offload.disable=%s", propValue );
2295            return false;
2296        }
2297    }
2298
2299    // Check if stream type is music, then only allow offload as of now.
2300    if (offloadInfo.stream_type != AUDIO_STREAM_MUSIC)
2301    {
2302        ALOGV("isOffloadSupported: stream_type != MUSIC, returning false");
2303        return false;
2304    }
2305
2306    //TODO: enable audio offloading with video when ready
2307    if (offloadInfo.has_video)
2308    {
2309        ALOGV("isOffloadSupported: has_video == true, returning false");
2310        return false;
2311    }
2312
2313    //If duration is less than minimum value defined in property, return false
2314    if (property_get("audio.offload.min.duration.secs", propValue, NULL)) {
2315        if (offloadInfo.duration_us < (atoi(propValue) * 1000000 )) {
2316            ALOGV("Offload denied by duration < audio.offload.min.duration.secs(=%s)", propValue);
2317            return false;
2318        }
2319    } else if (offloadInfo.duration_us < OFFLOAD_DEFAULT_MIN_DURATION_SECS * 1000000) {
2320        ALOGV("Offload denied by duration < default min(=%u)", OFFLOAD_DEFAULT_MIN_DURATION_SECS);
2321        return false;
2322    }
2323
2324    // Do not allow offloading if one non offloadable effect is enabled. This prevents from
2325    // creating an offloaded track and tearing it down immediately after start when audioflinger
2326    // detects there is an active non offloadable effect.
2327    // FIXME: We should check the audio session here but we do not have it in this context.
2328    // This may prevent offloading in rare situations where effects are left active by apps
2329    // in the background.
2330    if (isNonOffloadableEffectEnabled()) {
2331        return false;
2332    }
2333
2334    // See if there is a profile to support this.
2335    // AUDIO_DEVICE_NONE
2336    sp<IOProfile> profile = getProfileForDirectOutput(AUDIO_DEVICE_NONE /*ignore device */,
2337                                            offloadInfo.sample_rate,
2338                                            offloadInfo.format,
2339                                            offloadInfo.channel_mask,
2340                                            AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD);
2341    ALOGV("isOffloadSupported() profile %sfound", profile != 0 ? "" : "NOT ");
2342    return (profile != 0);
2343}
2344
2345status_t AudioPolicyManager::listAudioPorts(audio_port_role_t role,
2346                                            audio_port_type_t type,
2347                                            unsigned int *num_ports,
2348                                            struct audio_port *ports,
2349                                            unsigned int *generation)
2350{
2351    if (num_ports == NULL || (*num_ports != 0 && ports == NULL) ||
2352            generation == NULL) {
2353        return BAD_VALUE;
2354    }
2355    ALOGV("listAudioPorts() role %d type %d num_ports %d ports %p", role, type, *num_ports, ports);
2356    if (ports == NULL) {
2357        *num_ports = 0;
2358    }
2359
2360    size_t portsWritten = 0;
2361    size_t portsMax = *num_ports;
2362    *num_ports = 0;
2363    if (type == AUDIO_PORT_TYPE_NONE || type == AUDIO_PORT_TYPE_DEVICE) {
2364        if (role == AUDIO_PORT_ROLE_SINK || role == AUDIO_PORT_ROLE_NONE) {
2365            for (size_t i = 0;
2366                    i  < mAvailableOutputDevices.size() && portsWritten < portsMax; i++) {
2367                mAvailableOutputDevices[i]->toAudioPort(&ports[portsWritten++]);
2368            }
2369            *num_ports += mAvailableOutputDevices.size();
2370        }
2371        if (role == AUDIO_PORT_ROLE_SOURCE || role == AUDIO_PORT_ROLE_NONE) {
2372            for (size_t i = 0;
2373                    i  < mAvailableInputDevices.size() && portsWritten < portsMax; i++) {
2374                mAvailableInputDevices[i]->toAudioPort(&ports[portsWritten++]);
2375            }
2376            *num_ports += mAvailableInputDevices.size();
2377        }
2378    }
2379    if (type == AUDIO_PORT_TYPE_NONE || type == AUDIO_PORT_TYPE_MIX) {
2380        if (role == AUDIO_PORT_ROLE_SINK || role == AUDIO_PORT_ROLE_NONE) {
2381            for (size_t i = 0; i < mInputs.size() && portsWritten < portsMax; i++) {
2382                mInputs[i]->toAudioPort(&ports[portsWritten++]);
2383            }
2384            *num_ports += mInputs.size();
2385        }
2386        if (role == AUDIO_PORT_ROLE_SOURCE || role == AUDIO_PORT_ROLE_NONE) {
2387            size_t numOutputs = 0;
2388            for (size_t i = 0; i < mOutputs.size(); i++) {
2389                if (!mOutputs[i]->isDuplicated()) {
2390                    numOutputs++;
2391                    if (portsWritten < portsMax) {
2392                        mOutputs[i]->toAudioPort(&ports[portsWritten++]);
2393                    }
2394                }
2395            }
2396            *num_ports += numOutputs;
2397        }
2398    }
2399    *generation = curAudioPortGeneration();
2400    ALOGV("listAudioPorts() got %zu ports needed %d", portsWritten, *num_ports);
2401    return NO_ERROR;
2402}
2403
2404status_t AudioPolicyManager::getAudioPort(struct audio_port *port __unused)
2405{
2406    return NO_ERROR;
2407}
2408
2409sp<AudioPolicyManager::AudioOutputDescriptor> AudioPolicyManager::getOutputFromId(
2410                                                                    audio_port_handle_t id) const
2411{
2412    sp<AudioOutputDescriptor> outputDesc = NULL;
2413    for (size_t i = 0; i < mOutputs.size(); i++) {
2414        outputDesc = mOutputs.valueAt(i);
2415        if (outputDesc->mId == id) {
2416            break;
2417        }
2418    }
2419    return outputDesc;
2420}
2421
2422sp<AudioPolicyManager::AudioInputDescriptor> AudioPolicyManager::getInputFromId(
2423                                                                    audio_port_handle_t id) const
2424{
2425    sp<AudioInputDescriptor> inputDesc = NULL;
2426    for (size_t i = 0; i < mInputs.size(); i++) {
2427        inputDesc = mInputs.valueAt(i);
2428        if (inputDesc->mId == id) {
2429            break;
2430        }
2431    }
2432    return inputDesc;
2433}
2434
2435sp <AudioPolicyManager::HwModule> AudioPolicyManager::getModuleForDevice(
2436                                                                    audio_devices_t device) const
2437{
2438    sp <HwModule> module;
2439
2440    for (size_t i = 0; i < mHwModules.size(); i++) {
2441        if (mHwModules[i]->mHandle == 0) {
2442            continue;
2443        }
2444        if (audio_is_output_device(device)) {
2445            for (size_t j = 0; j < mHwModules[i]->mOutputProfiles.size(); j++)
2446            {
2447                if (mHwModules[i]->mOutputProfiles[j]->mSupportedDevices.types() & device) {
2448                    return mHwModules[i];
2449                }
2450            }
2451        } else {
2452            for (size_t j = 0; j < mHwModules[i]->mInputProfiles.size(); j++) {
2453                if (mHwModules[i]->mInputProfiles[j]->mSupportedDevices.types() &
2454                        device & ~AUDIO_DEVICE_BIT_IN) {
2455                    return mHwModules[i];
2456                }
2457            }
2458        }
2459    }
2460    return module;
2461}
2462
2463sp <AudioPolicyManager::HwModule> AudioPolicyManager::getModuleFromName(const char *name) const
2464{
2465    sp <HwModule> module;
2466
2467    for (size_t i = 0; i < mHwModules.size(); i++)
2468    {
2469        if (strcmp(mHwModules[i]->mName, name) == 0) {
2470            return mHwModules[i];
2471        }
2472    }
2473    return module;
2474}
2475
2476audio_devices_t AudioPolicyManager::availablePrimaryOutputDevices()
2477{
2478    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(mPrimaryOutput);
2479    audio_devices_t devices = outputDesc->mProfile->mSupportedDevices.types();
2480    return devices & mAvailableOutputDevices.types();
2481}
2482
2483audio_devices_t AudioPolicyManager::availablePrimaryInputDevices()
2484{
2485    audio_module_handle_t primaryHandle =
2486                                mOutputs.valueFor(mPrimaryOutput)->mProfile->mModule->mHandle;
2487    audio_devices_t devices = AUDIO_DEVICE_NONE;
2488    for (size_t i = 0; i < mAvailableInputDevices.size(); i++) {
2489        if (mAvailableInputDevices[i]->mModule->mHandle == primaryHandle) {
2490            devices |= mAvailableInputDevices[i]->mDeviceType;
2491        }
2492    }
2493    return devices;
2494}
2495
2496status_t AudioPolicyManager::createAudioPatch(const struct audio_patch *patch,
2497                                               audio_patch_handle_t *handle,
2498                                               uid_t uid)
2499{
2500    ALOGV("createAudioPatch()");
2501
2502    if (handle == NULL || patch == NULL) {
2503        return BAD_VALUE;
2504    }
2505    ALOGV("createAudioPatch() num sources %d num sinks %d", patch->num_sources, patch->num_sinks);
2506
2507    if (patch->num_sources == 0 || patch->num_sources > AUDIO_PATCH_PORTS_MAX ||
2508            patch->num_sinks == 0 || patch->num_sinks > AUDIO_PATCH_PORTS_MAX) {
2509        return BAD_VALUE;
2510    }
2511    // only one source per audio patch supported for now
2512    if (patch->num_sources > 1) {
2513        return INVALID_OPERATION;
2514    }
2515
2516    if (patch->sources[0].role != AUDIO_PORT_ROLE_SOURCE) {
2517        return INVALID_OPERATION;
2518    }
2519    for (size_t i = 0; i < patch->num_sinks; i++) {
2520        if (patch->sinks[i].role != AUDIO_PORT_ROLE_SINK) {
2521            return INVALID_OPERATION;
2522        }
2523    }
2524
2525    sp<AudioPatch> patchDesc;
2526    ssize_t index = mAudioPatches.indexOfKey(*handle);
2527
2528    ALOGV("createAudioPatch source id %d role %d type %d", patch->sources[0].id,
2529                                                           patch->sources[0].role,
2530                                                           patch->sources[0].type);
2531#if LOG_NDEBUG == 0
2532    for (size_t i = 0; i < patch->num_sinks; i++) {
2533        ALOGV("createAudioPatch sink %d: id %d role %d type %d", i, patch->sinks[i].id,
2534                                                             patch->sinks[i].role,
2535                                                             patch->sinks[i].type);
2536    }
2537#endif
2538
2539    if (index >= 0) {
2540        patchDesc = mAudioPatches.valueAt(index);
2541        ALOGV("createAudioPatch() mUidCached %d patchDesc->mUid %d uid %d",
2542                                                                  mUidCached, patchDesc->mUid, uid);
2543        if (patchDesc->mUid != mUidCached && uid != patchDesc->mUid) {
2544            return INVALID_OPERATION;
2545        }
2546    } else {
2547        *handle = 0;
2548    }
2549
2550    if (patch->sources[0].type == AUDIO_PORT_TYPE_MIX) {
2551        sp<AudioOutputDescriptor> outputDesc = getOutputFromId(patch->sources[0].id);
2552        if (outputDesc == NULL) {
2553            ALOGV("createAudioPatch() output not found for id %d", patch->sources[0].id);
2554            return BAD_VALUE;
2555        }
2556        ALOG_ASSERT(!outputDesc->isDuplicated(),"duplicated output %d in source in ports",
2557                                                outputDesc->mIoHandle);
2558        if (patchDesc != 0) {
2559            if (patchDesc->mPatch.sources[0].id != patch->sources[0].id) {
2560                ALOGV("createAudioPatch() source id differs for patch current id %d new id %d",
2561                                          patchDesc->mPatch.sources[0].id, patch->sources[0].id);
2562                return BAD_VALUE;
2563            }
2564        }
2565        DeviceVector devices;
2566        for (size_t i = 0; i < patch->num_sinks; i++) {
2567            // Only support mix to devices connection
2568            // TODO add support for mix to mix connection
2569            if (patch->sinks[i].type != AUDIO_PORT_TYPE_DEVICE) {
2570                ALOGV("createAudioPatch() source mix but sink is not a device");
2571                return INVALID_OPERATION;
2572            }
2573            sp<DeviceDescriptor> devDesc =
2574                    mAvailableOutputDevices.getDeviceFromId(patch->sinks[i].id);
2575            if (devDesc == 0) {
2576                ALOGV("createAudioPatch() out device not found for id %d", patch->sinks[i].id);
2577                return BAD_VALUE;
2578            }
2579
2580            if (!outputDesc->mProfile->isCompatibleProfile(devDesc->mDeviceType,
2581                                                           devDesc->mAddress,
2582                                                           patch->sources[0].sample_rate,
2583                                                         NULL,  // updatedSamplingRate
2584                                                         patch->sources[0].format,
2585                                                         patch->sources[0].channel_mask,
2586                                                         AUDIO_OUTPUT_FLAG_NONE /*FIXME*/)) {
2587                ALOGV("createAudioPatch() profile not supported for device %08x",
2588                      devDesc->mDeviceType);
2589                return INVALID_OPERATION;
2590            }
2591            devices.add(devDesc);
2592        }
2593        if (devices.size() == 0) {
2594            return INVALID_OPERATION;
2595        }
2596
2597        // TODO: reconfigure output format and channels here
2598        ALOGV("createAudioPatch() setting device %08x on output %d",
2599              devices.types(), outputDesc->mIoHandle);
2600        setOutputDevice(outputDesc->mIoHandle, devices.types(), true, 0, handle);
2601        index = mAudioPatches.indexOfKey(*handle);
2602        if (index >= 0) {
2603            if (patchDesc != 0 && patchDesc != mAudioPatches.valueAt(index)) {
2604                ALOGW("createAudioPatch() setOutputDevice() did not reuse the patch provided");
2605            }
2606            patchDesc = mAudioPatches.valueAt(index);
2607            patchDesc->mUid = uid;
2608            ALOGV("createAudioPatch() success");
2609        } else {
2610            ALOGW("createAudioPatch() setOutputDevice() failed to create a patch");
2611            return INVALID_OPERATION;
2612        }
2613    } else if (patch->sources[0].type == AUDIO_PORT_TYPE_DEVICE) {
2614        if (patch->sinks[0].type == AUDIO_PORT_TYPE_MIX) {
2615            // input device to input mix connection
2616            // only one sink supported when connecting an input device to a mix
2617            if (patch->num_sinks > 1) {
2618                return INVALID_OPERATION;
2619            }
2620            sp<AudioInputDescriptor> inputDesc = getInputFromId(patch->sinks[0].id);
2621            if (inputDesc == NULL) {
2622                return BAD_VALUE;
2623            }
2624            if (patchDesc != 0) {
2625                if (patchDesc->mPatch.sinks[0].id != patch->sinks[0].id) {
2626                    return BAD_VALUE;
2627                }
2628            }
2629            sp<DeviceDescriptor> devDesc =
2630                    mAvailableInputDevices.getDeviceFromId(patch->sources[0].id);
2631            if (devDesc == 0) {
2632                return BAD_VALUE;
2633            }
2634
2635            if (!inputDesc->mProfile->isCompatibleProfile(devDesc->mDeviceType,
2636                                                          devDesc->mAddress,
2637                                                          patch->sinks[0].sample_rate,
2638                                                          NULL, /*updatedSampleRate*/
2639                                                          patch->sinks[0].format,
2640                                                          patch->sinks[0].channel_mask,
2641                                                          // FIXME for the parameter type,
2642                                                          // and the NONE
2643                                                          (audio_output_flags_t)
2644                                                            AUDIO_INPUT_FLAG_NONE)) {
2645                return INVALID_OPERATION;
2646            }
2647            // TODO: reconfigure output format and channels here
2648            ALOGV("createAudioPatch() setting device %08x on output %d",
2649                                                  devDesc->mDeviceType, inputDesc->mIoHandle);
2650            setInputDevice(inputDesc->mIoHandle, devDesc->mDeviceType, true, handle);
2651            index = mAudioPatches.indexOfKey(*handle);
2652            if (index >= 0) {
2653                if (patchDesc != 0 && patchDesc != mAudioPatches.valueAt(index)) {
2654                    ALOGW("createAudioPatch() setInputDevice() did not reuse the patch provided");
2655                }
2656                patchDesc = mAudioPatches.valueAt(index);
2657                patchDesc->mUid = uid;
2658                ALOGV("createAudioPatch() success");
2659            } else {
2660                ALOGW("createAudioPatch() setInputDevice() failed to create a patch");
2661                return INVALID_OPERATION;
2662            }
2663        } else if (patch->sinks[0].type == AUDIO_PORT_TYPE_DEVICE) {
2664            // device to device connection
2665            if (patchDesc != 0) {
2666                if (patchDesc->mPatch.sources[0].id != patch->sources[0].id) {
2667                    return BAD_VALUE;
2668                }
2669            }
2670            sp<DeviceDescriptor> srcDeviceDesc =
2671                    mAvailableInputDevices.getDeviceFromId(patch->sources[0].id);
2672            if (srcDeviceDesc == 0) {
2673                return BAD_VALUE;
2674            }
2675
2676            //update source and sink with our own data as the data passed in the patch may
2677            // be incomplete.
2678            struct audio_patch newPatch = *patch;
2679            srcDeviceDesc->toAudioPortConfig(&newPatch.sources[0], &patch->sources[0]);
2680
2681            for (size_t i = 0; i < patch->num_sinks; i++) {
2682                if (patch->sinks[i].type != AUDIO_PORT_TYPE_DEVICE) {
2683                    ALOGV("createAudioPatch() source device but one sink is not a device");
2684                    return INVALID_OPERATION;
2685                }
2686
2687                sp<DeviceDescriptor> sinkDeviceDesc =
2688                        mAvailableOutputDevices.getDeviceFromId(patch->sinks[i].id);
2689                if (sinkDeviceDesc == 0) {
2690                    return BAD_VALUE;
2691                }
2692                sinkDeviceDesc->toAudioPortConfig(&newPatch.sinks[i], &patch->sinks[i]);
2693
2694                if (srcDeviceDesc->mModule != sinkDeviceDesc->mModule) {
2695                    // only one sink supported when connected devices across HW modules
2696                    if (patch->num_sinks > 1) {
2697                        return INVALID_OPERATION;
2698                    }
2699                    SortedVector<audio_io_handle_t> outputs =
2700                                            getOutputsForDevice(sinkDeviceDesc->mDeviceType,
2701                                                                mOutputs);
2702                    // if the sink device is reachable via an opened output stream, request to go via
2703                    // this output stream by adding a second source to the patch description
2704                    audio_io_handle_t output = selectOutput(outputs,
2705                                                            AUDIO_OUTPUT_FLAG_NONE,
2706                                                            AUDIO_FORMAT_INVALID);
2707                    if (output != AUDIO_IO_HANDLE_NONE) {
2708                        sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
2709                        if (outputDesc->isDuplicated()) {
2710                            return INVALID_OPERATION;
2711                        }
2712                        outputDesc->toAudioPortConfig(&newPatch.sources[1], &patch->sources[0]);
2713                        newPatch.num_sources = 2;
2714                    }
2715                }
2716            }
2717            // TODO: check from routing capabilities in config file and other conflicting patches
2718
2719            audio_patch_handle_t afPatchHandle = AUDIO_PATCH_HANDLE_NONE;
2720            if (index >= 0) {
2721                afPatchHandle = patchDesc->mAfPatchHandle;
2722            }
2723
2724            status_t status = mpClientInterface->createAudioPatch(&newPatch,
2725                                                                  &afPatchHandle,
2726                                                                  0);
2727            ALOGV("createAudioPatch() patch panel returned %d patchHandle %d",
2728                                                                  status, afPatchHandle);
2729            if (status == NO_ERROR) {
2730                if (index < 0) {
2731                    patchDesc = new AudioPatch((audio_patch_handle_t)nextUniqueId(),
2732                                               &newPatch, uid);
2733                    addAudioPatch(patchDesc->mHandle, patchDesc);
2734                } else {
2735                    patchDesc->mPatch = newPatch;
2736                }
2737                patchDesc->mAfPatchHandle = afPatchHandle;
2738                *handle = patchDesc->mHandle;
2739                nextAudioPortGeneration();
2740                mpClientInterface->onAudioPatchListUpdate();
2741            } else {
2742                ALOGW("createAudioPatch() patch panel could not connect device patch, error %d",
2743                status);
2744                return INVALID_OPERATION;
2745            }
2746        } else {
2747            return BAD_VALUE;
2748        }
2749    } else {
2750        return BAD_VALUE;
2751    }
2752    return NO_ERROR;
2753}
2754
2755status_t AudioPolicyManager::releaseAudioPatch(audio_patch_handle_t handle,
2756                                                  uid_t uid)
2757{
2758    ALOGV("releaseAudioPatch() patch %d", handle);
2759
2760    ssize_t index = mAudioPatches.indexOfKey(handle);
2761
2762    if (index < 0) {
2763        return BAD_VALUE;
2764    }
2765    sp<AudioPatch> patchDesc = mAudioPatches.valueAt(index);
2766    ALOGV("releaseAudioPatch() mUidCached %d patchDesc->mUid %d uid %d",
2767          mUidCached, patchDesc->mUid, uid);
2768    if (patchDesc->mUid != mUidCached && uid != patchDesc->mUid) {
2769        return INVALID_OPERATION;
2770    }
2771
2772    struct audio_patch *patch = &patchDesc->mPatch;
2773    patchDesc->mUid = mUidCached;
2774    if (patch->sources[0].type == AUDIO_PORT_TYPE_MIX) {
2775        sp<AudioOutputDescriptor> outputDesc = getOutputFromId(patch->sources[0].id);
2776        if (outputDesc == NULL) {
2777            ALOGV("releaseAudioPatch() output not found for id %d", patch->sources[0].id);
2778            return BAD_VALUE;
2779        }
2780
2781        setOutputDevice(outputDesc->mIoHandle,
2782                        getNewOutputDevice(outputDesc->mIoHandle, true /*fromCache*/),
2783                       true,
2784                       0,
2785                       NULL);
2786    } else if (patch->sources[0].type == AUDIO_PORT_TYPE_DEVICE) {
2787        if (patch->sinks[0].type == AUDIO_PORT_TYPE_MIX) {
2788            sp<AudioInputDescriptor> inputDesc = getInputFromId(patch->sinks[0].id);
2789            if (inputDesc == NULL) {
2790                ALOGV("releaseAudioPatch() input not found for id %d", patch->sinks[0].id);
2791                return BAD_VALUE;
2792            }
2793            setInputDevice(inputDesc->mIoHandle,
2794                           getNewInputDevice(inputDesc->mIoHandle),
2795                           true,
2796                           NULL);
2797        } else if (patch->sinks[0].type == AUDIO_PORT_TYPE_DEVICE) {
2798            audio_patch_handle_t afPatchHandle = patchDesc->mAfPatchHandle;
2799            status_t status = mpClientInterface->releaseAudioPatch(patchDesc->mAfPatchHandle, 0);
2800            ALOGV("releaseAudioPatch() patch panel returned %d patchHandle %d",
2801                                                              status, patchDesc->mAfPatchHandle);
2802            removeAudioPatch(patchDesc->mHandle);
2803            nextAudioPortGeneration();
2804            mpClientInterface->onAudioPatchListUpdate();
2805        } else {
2806            return BAD_VALUE;
2807        }
2808    } else {
2809        return BAD_VALUE;
2810    }
2811    return NO_ERROR;
2812}
2813
2814status_t AudioPolicyManager::listAudioPatches(unsigned int *num_patches,
2815                                              struct audio_patch *patches,
2816                                              unsigned int *generation)
2817{
2818    if (num_patches == NULL || (*num_patches != 0 && patches == NULL) ||
2819            generation == NULL) {
2820        return BAD_VALUE;
2821    }
2822    ALOGV("listAudioPatches() num_patches %d patches %p available patches %zu",
2823          *num_patches, patches, mAudioPatches.size());
2824    if (patches == NULL) {
2825        *num_patches = 0;
2826    }
2827
2828    size_t patchesWritten = 0;
2829    size_t patchesMax = *num_patches;
2830    for (size_t i = 0;
2831            i  < mAudioPatches.size() && patchesWritten < patchesMax; i++) {
2832        patches[patchesWritten] = mAudioPatches[i]->mPatch;
2833        patches[patchesWritten++].id = mAudioPatches[i]->mHandle;
2834        ALOGV("listAudioPatches() patch %zu num_sources %d num_sinks %d",
2835              i, mAudioPatches[i]->mPatch.num_sources, mAudioPatches[i]->mPatch.num_sinks);
2836    }
2837    *num_patches = mAudioPatches.size();
2838
2839    *generation = curAudioPortGeneration();
2840    ALOGV("listAudioPatches() got %zu patches needed %d", patchesWritten, *num_patches);
2841    return NO_ERROR;
2842}
2843
2844status_t AudioPolicyManager::setAudioPortConfig(const struct audio_port_config *config)
2845{
2846    ALOGV("setAudioPortConfig()");
2847
2848    if (config == NULL) {
2849        return BAD_VALUE;
2850    }
2851    ALOGV("setAudioPortConfig() on port handle %d", config->id);
2852    // Only support gain configuration for now
2853    if (config->config_mask != AUDIO_PORT_CONFIG_GAIN) {
2854        return INVALID_OPERATION;
2855    }
2856
2857    sp<AudioPortConfig> audioPortConfig;
2858    if (config->type == AUDIO_PORT_TYPE_MIX) {
2859        if (config->role == AUDIO_PORT_ROLE_SOURCE) {
2860            sp<AudioOutputDescriptor> outputDesc = getOutputFromId(config->id);
2861            if (outputDesc == NULL) {
2862                return BAD_VALUE;
2863            }
2864            ALOG_ASSERT(!outputDesc->isDuplicated(),
2865                        "setAudioPortConfig() called on duplicated output %d",
2866                        outputDesc->mIoHandle);
2867            audioPortConfig = outputDesc;
2868        } else if (config->role == AUDIO_PORT_ROLE_SINK) {
2869            sp<AudioInputDescriptor> inputDesc = getInputFromId(config->id);
2870            if (inputDesc == NULL) {
2871                return BAD_VALUE;
2872            }
2873            audioPortConfig = inputDesc;
2874        } else {
2875            return BAD_VALUE;
2876        }
2877    } else if (config->type == AUDIO_PORT_TYPE_DEVICE) {
2878        sp<DeviceDescriptor> deviceDesc;
2879        if (config->role == AUDIO_PORT_ROLE_SOURCE) {
2880            deviceDesc = mAvailableInputDevices.getDeviceFromId(config->id);
2881        } else if (config->role == AUDIO_PORT_ROLE_SINK) {
2882            deviceDesc = mAvailableOutputDevices.getDeviceFromId(config->id);
2883        } else {
2884            return BAD_VALUE;
2885        }
2886        if (deviceDesc == NULL) {
2887            return BAD_VALUE;
2888        }
2889        audioPortConfig = deviceDesc;
2890    } else {
2891        return BAD_VALUE;
2892    }
2893
2894    struct audio_port_config backupConfig;
2895    status_t status = audioPortConfig->applyAudioPortConfig(config, &backupConfig);
2896    if (status == NO_ERROR) {
2897        struct audio_port_config newConfig;
2898        audioPortConfig->toAudioPortConfig(&newConfig, config);
2899        status = mpClientInterface->setAudioPortConfig(&newConfig, 0);
2900    }
2901    if (status != NO_ERROR) {
2902        audioPortConfig->applyAudioPortConfig(&backupConfig);
2903    }
2904
2905    return status;
2906}
2907
2908void AudioPolicyManager::clearAudioPatches(uid_t uid)
2909{
2910    for (ssize_t i = (ssize_t)mAudioPatches.size() - 1; i >= 0; i--)  {
2911        sp<AudioPatch> patchDesc = mAudioPatches.valueAt(i);
2912        if (patchDesc->mUid == uid) {
2913            releaseAudioPatch(mAudioPatches.keyAt(i), uid);
2914        }
2915    }
2916}
2917
2918status_t AudioPolicyManager::acquireSoundTriggerSession(audio_session_t *session,
2919                                       audio_io_handle_t *ioHandle,
2920                                       audio_devices_t *device)
2921{
2922    *session = (audio_session_t)mpClientInterface->newAudioUniqueId();
2923    *ioHandle = (audio_io_handle_t)mpClientInterface->newAudioUniqueId();
2924    *device = getDeviceAndMixForInputSource(AUDIO_SOURCE_HOTWORD);
2925
2926    mSoundTriggerSessions.add(*session, *ioHandle);
2927
2928    return NO_ERROR;
2929}
2930
2931status_t AudioPolicyManager::releaseSoundTriggerSession(audio_session_t session)
2932{
2933    ssize_t index = mSoundTriggerSessions.indexOfKey(session);
2934    if (index < 0) {
2935        ALOGW("acquireSoundTriggerSession() session %d not registered", session);
2936        return BAD_VALUE;
2937    }
2938
2939    mSoundTriggerSessions.removeItem(session);
2940    return NO_ERROR;
2941}
2942
2943status_t AudioPolicyManager::addAudioPatch(audio_patch_handle_t handle,
2944                                           const sp<AudioPatch>& patch)
2945{
2946    ssize_t index = mAudioPatches.indexOfKey(handle);
2947
2948    if (index >= 0) {
2949        ALOGW("addAudioPatch() patch %d already in", handle);
2950        return ALREADY_EXISTS;
2951    }
2952    mAudioPatches.add(handle, patch);
2953    ALOGV("addAudioPatch() handle %d af handle %d num_sources %d num_sinks %d source handle %d"
2954            "sink handle %d",
2955          handle, patch->mAfPatchHandle, patch->mPatch.num_sources, patch->mPatch.num_sinks,
2956          patch->mPatch.sources[0].id, patch->mPatch.sinks[0].id);
2957    return NO_ERROR;
2958}
2959
2960status_t AudioPolicyManager::removeAudioPatch(audio_patch_handle_t handle)
2961{
2962    ssize_t index = mAudioPatches.indexOfKey(handle);
2963
2964    if (index < 0) {
2965        ALOGW("removeAudioPatch() patch %d not in", handle);
2966        return ALREADY_EXISTS;
2967    }
2968    ALOGV("removeAudioPatch() handle %d af handle %d", handle,
2969                      mAudioPatches.valueAt(index)->mAfPatchHandle);
2970    mAudioPatches.removeItemsAt(index);
2971    return NO_ERROR;
2972}
2973
2974// ----------------------------------------------------------------------------
2975// AudioPolicyManager
2976// ----------------------------------------------------------------------------
2977
2978uint32_t AudioPolicyManager::nextUniqueId()
2979{
2980    return android_atomic_inc(&mNextUniqueId);
2981}
2982
2983uint32_t AudioPolicyManager::nextAudioPortGeneration()
2984{
2985    return android_atomic_inc(&mAudioPortGeneration);
2986}
2987
2988AudioPolicyManager::AudioPolicyManager(AudioPolicyClientInterface *clientInterface)
2989    :
2990#ifdef AUDIO_POLICY_TEST
2991    Thread(false),
2992#endif //AUDIO_POLICY_TEST
2993    mPrimaryOutput((audio_io_handle_t)0),
2994    mPhoneState(AUDIO_MODE_NORMAL),
2995    mLimitRingtoneVolume(false), mLastVoiceVolume(-1.0f),
2996    mTotalEffectsCpuLoad(0), mTotalEffectsMemory(0),
2997    mA2dpSuspended(false),
2998    mSpeakerDrcEnabled(false), mNextUniqueId(1),
2999    mAudioPortGeneration(1),
3000    mBeaconMuteRefCount(0),
3001    mBeaconPlayingRefCount(0),
3002    mBeaconMuted(false)
3003{
3004    mUidCached = getuid();
3005    mpClientInterface = clientInterface;
3006
3007    for (int i = 0; i < AUDIO_POLICY_FORCE_USE_CNT; i++) {
3008        mForceUse[i] = AUDIO_POLICY_FORCE_NONE;
3009    }
3010
3011    mDefaultOutputDevice = new DeviceDescriptor(String8(""), AUDIO_DEVICE_OUT_SPEAKER);
3012    if (loadAudioPolicyConfig(AUDIO_POLICY_VENDOR_CONFIG_FILE) != NO_ERROR) {
3013        if (loadAudioPolicyConfig(AUDIO_POLICY_CONFIG_FILE) != NO_ERROR) {
3014            ALOGE("could not load audio policy configuration file, setting defaults");
3015            defaultAudioPolicyConfig();
3016        }
3017    }
3018    // mAvailableOutputDevices and mAvailableInputDevices now contain all attached devices
3019
3020    // must be done after reading the policy
3021    initializeVolumeCurves();
3022
3023    // open all output streams needed to access attached devices
3024    audio_devices_t outputDeviceTypes = mAvailableOutputDevices.types();
3025    audio_devices_t inputDeviceTypes = mAvailableInputDevices.types() & ~AUDIO_DEVICE_BIT_IN;
3026    for (size_t i = 0; i < mHwModules.size(); i++) {
3027        mHwModules[i]->mHandle = mpClientInterface->loadHwModule(mHwModules[i]->mName);
3028        if (mHwModules[i]->mHandle == 0) {
3029            ALOGW("could not open HW module %s", mHwModules[i]->mName);
3030            continue;
3031        }
3032        // open all output streams needed to access attached devices
3033        // except for direct output streams that are only opened when they are actually
3034        // required by an app.
3035        // This also validates mAvailableOutputDevices list
3036        for (size_t j = 0; j < mHwModules[i]->mOutputProfiles.size(); j++)
3037        {
3038            const sp<IOProfile> outProfile = mHwModules[i]->mOutputProfiles[j];
3039
3040            if (outProfile->mSupportedDevices.isEmpty()) {
3041                ALOGW("Output profile contains no device on module %s", mHwModules[i]->mName);
3042                continue;
3043            }
3044
3045            if ((outProfile->mFlags & AUDIO_OUTPUT_FLAG_DIRECT) != 0) {
3046                continue;
3047            }
3048            audio_devices_t profileType = outProfile->mSupportedDevices.types();
3049            if ((profileType & mDefaultOutputDevice->mDeviceType) != AUDIO_DEVICE_NONE) {
3050                profileType = mDefaultOutputDevice->mDeviceType;
3051            } else {
3052                // chose first device present in mSupportedDevices also part of
3053                // outputDeviceTypes
3054                for (size_t k = 0; k  < outProfile->mSupportedDevices.size(); k++) {
3055                    profileType = outProfile->mSupportedDevices[k]->mDeviceType;
3056                    if ((profileType & outputDeviceTypes) != 0) {
3057                        break;
3058                    }
3059                }
3060            }
3061            if ((profileType & outputDeviceTypes) == 0) {
3062                continue;
3063            }
3064            sp<AudioOutputDescriptor> outputDesc = new AudioOutputDescriptor(outProfile);
3065
3066            outputDesc->mDevice = profileType;
3067            audio_config_t config = AUDIO_CONFIG_INITIALIZER;
3068            config.sample_rate = outputDesc->mSamplingRate;
3069            config.channel_mask = outputDesc->mChannelMask;
3070            config.format = outputDesc->mFormat;
3071            audio_io_handle_t output = AUDIO_IO_HANDLE_NONE;
3072            status_t status = mpClientInterface->openOutput(outProfile->mModule->mHandle,
3073                                                            &output,
3074                                                            &config,
3075                                                            &outputDesc->mDevice,
3076                                                            String8(""),
3077                                                            &outputDesc->mLatency,
3078                                                            outputDesc->mFlags);
3079
3080            if (status != NO_ERROR) {
3081                ALOGW("Cannot open output stream for device %08x on hw module %s",
3082                      outputDesc->mDevice,
3083                      mHwModules[i]->mName);
3084            } else {
3085                outputDesc->mSamplingRate = config.sample_rate;
3086                outputDesc->mChannelMask = config.channel_mask;
3087                outputDesc->mFormat = config.format;
3088
3089                for (size_t k = 0; k  < outProfile->mSupportedDevices.size(); k++) {
3090                    audio_devices_t type = outProfile->mSupportedDevices[k]->mDeviceType;
3091                    ssize_t index =
3092                            mAvailableOutputDevices.indexOf(outProfile->mSupportedDevices[k]);
3093                    // give a valid ID to an attached device once confirmed it is reachable
3094                    if ((index >= 0) && (mAvailableOutputDevices[index]->mId == 0)) {
3095                        mAvailableOutputDevices[index]->mId = nextUniqueId();
3096                        mAvailableOutputDevices[index]->mModule = mHwModules[i];
3097                    }
3098                }
3099                if (mPrimaryOutput == 0 &&
3100                        outProfile->mFlags & AUDIO_OUTPUT_FLAG_PRIMARY) {
3101                    mPrimaryOutput = output;
3102                }
3103                addOutput(output, outputDesc);
3104                setOutputDevice(output,
3105                                outputDesc->mDevice,
3106                                true);
3107            }
3108        }
3109        // open input streams needed to access attached devices to validate
3110        // mAvailableInputDevices list
3111        for (size_t j = 0; j < mHwModules[i]->mInputProfiles.size(); j++)
3112        {
3113            const sp<IOProfile> inProfile = mHwModules[i]->mInputProfiles[j];
3114
3115            if (inProfile->mSupportedDevices.isEmpty()) {
3116                ALOGW("Input profile contains no device on module %s", mHwModules[i]->mName);
3117                continue;
3118            }
3119            // chose first device present in mSupportedDevices also part of
3120            // inputDeviceTypes
3121            audio_devices_t profileType = AUDIO_DEVICE_NONE;
3122            for (size_t k = 0; k  < inProfile->mSupportedDevices.size(); k++) {
3123                profileType = inProfile->mSupportedDevices[k]->mDeviceType;
3124                if (profileType & inputDeviceTypes) {
3125                    break;
3126                }
3127            }
3128            if ((profileType & inputDeviceTypes) == 0) {
3129                continue;
3130            }
3131            sp<AudioInputDescriptor> inputDesc = new AudioInputDescriptor(inProfile);
3132
3133            inputDesc->mInputSource = AUDIO_SOURCE_MIC;
3134            inputDesc->mDevice = profileType;
3135
3136            // find the address
3137            DeviceVector inputDevices = mAvailableInputDevices.getDevicesFromType(profileType);
3138            //   the inputs vector must be of size 1, but we don't want to crash here
3139            String8 address = inputDevices.size() > 0 ? inputDevices.itemAt(0)->mAddress
3140                    : String8("");
3141            ALOGV("  for input device 0x%x using address %s", profileType, address.string());
3142            ALOGE_IF(inputDevices.size() == 0, "Input device list is empty!");
3143
3144            audio_config_t config = AUDIO_CONFIG_INITIALIZER;
3145            config.sample_rate = inputDesc->mSamplingRate;
3146            config.channel_mask = inputDesc->mChannelMask;
3147            config.format = inputDesc->mFormat;
3148            audio_io_handle_t input = AUDIO_IO_HANDLE_NONE;
3149            status_t status = mpClientInterface->openInput(inProfile->mModule->mHandle,
3150                                                           &input,
3151                                                           &config,
3152                                                           &inputDesc->mDevice,
3153                                                           address,
3154                                                           AUDIO_SOURCE_MIC,
3155                                                           AUDIO_INPUT_FLAG_NONE);
3156
3157            if (status == NO_ERROR) {
3158                for (size_t k = 0; k  < inProfile->mSupportedDevices.size(); k++) {
3159                    audio_devices_t type = inProfile->mSupportedDevices[k]->mDeviceType;
3160                    ssize_t index =
3161                            mAvailableInputDevices.indexOf(inProfile->mSupportedDevices[k]);
3162                    // give a valid ID to an attached device once confirmed it is reachable
3163                    if ((index >= 0) && (mAvailableInputDevices[index]->mId == 0)) {
3164                        mAvailableInputDevices[index]->mId = nextUniqueId();
3165                        mAvailableInputDevices[index]->mModule = mHwModules[i];
3166                    }
3167                }
3168                mpClientInterface->closeInput(input);
3169            } else {
3170                ALOGW("Cannot open input stream for device %08x on hw module %s",
3171                      inputDesc->mDevice,
3172                      mHwModules[i]->mName);
3173            }
3174        }
3175    }
3176    // make sure all attached devices have been allocated a unique ID
3177    for (size_t i = 0; i  < mAvailableOutputDevices.size();) {
3178        if (mAvailableOutputDevices[i]->mId == 0) {
3179            ALOGW("Input device %08x unreachable", mAvailableOutputDevices[i]->mDeviceType);
3180            mAvailableOutputDevices.remove(mAvailableOutputDevices[i]);
3181            continue;
3182        }
3183        i++;
3184    }
3185    for (size_t i = 0; i  < mAvailableInputDevices.size();) {
3186        if (mAvailableInputDevices[i]->mId == 0) {
3187            ALOGW("Input device %08x unreachable", mAvailableInputDevices[i]->mDeviceType);
3188            mAvailableInputDevices.remove(mAvailableInputDevices[i]);
3189            continue;
3190        }
3191        i++;
3192    }
3193    // make sure default device is reachable
3194    if (mAvailableOutputDevices.indexOf(mDefaultOutputDevice) < 0) {
3195        ALOGE("Default device %08x is unreachable", mDefaultOutputDevice->mDeviceType);
3196    }
3197
3198    ALOGE_IF((mPrimaryOutput == 0), "Failed to open primary output");
3199
3200    updateDevicesAndOutputs();
3201
3202#ifdef AUDIO_POLICY_TEST
3203    if (mPrimaryOutput != 0) {
3204        AudioParameter outputCmd = AudioParameter();
3205        outputCmd.addInt(String8("set_id"), 0);
3206        mpClientInterface->setParameters(mPrimaryOutput, outputCmd.toString());
3207
3208        mTestDevice = AUDIO_DEVICE_OUT_SPEAKER;
3209        mTestSamplingRate = 44100;
3210        mTestFormat = AUDIO_FORMAT_PCM_16_BIT;
3211        mTestChannels =  AUDIO_CHANNEL_OUT_STEREO;
3212        mTestLatencyMs = 0;
3213        mCurOutput = 0;
3214        mDirectOutput = false;
3215        for (int i = 0; i < NUM_TEST_OUTPUTS; i++) {
3216            mTestOutputs[i] = 0;
3217        }
3218
3219        const size_t SIZE = 256;
3220        char buffer[SIZE];
3221        snprintf(buffer, SIZE, "AudioPolicyManagerTest");
3222        run(buffer, ANDROID_PRIORITY_AUDIO);
3223    }
3224#endif //AUDIO_POLICY_TEST
3225}
3226
3227AudioPolicyManager::~AudioPolicyManager()
3228{
3229#ifdef AUDIO_POLICY_TEST
3230    exit();
3231#endif //AUDIO_POLICY_TEST
3232   for (size_t i = 0; i < mOutputs.size(); i++) {
3233        mpClientInterface->closeOutput(mOutputs.keyAt(i));
3234   }
3235   for (size_t i = 0; i < mInputs.size(); i++) {
3236        mpClientInterface->closeInput(mInputs.keyAt(i));
3237   }
3238   mAvailableOutputDevices.clear();
3239   mAvailableInputDevices.clear();
3240   mOutputs.clear();
3241   mInputs.clear();
3242   mHwModules.clear();
3243}
3244
3245status_t AudioPolicyManager::initCheck()
3246{
3247    return (mPrimaryOutput == 0) ? NO_INIT : NO_ERROR;
3248}
3249
3250#ifdef AUDIO_POLICY_TEST
3251bool AudioPolicyManager::threadLoop()
3252{
3253    ALOGV("entering threadLoop()");
3254    while (!exitPending())
3255    {
3256        String8 command;
3257        int valueInt;
3258        String8 value;
3259
3260        Mutex::Autolock _l(mLock);
3261        mWaitWorkCV.waitRelative(mLock, milliseconds(50));
3262
3263        command = mpClientInterface->getParameters(0, String8("test_cmd_policy"));
3264        AudioParameter param = AudioParameter(command);
3265
3266        if (param.getInt(String8("test_cmd_policy"), valueInt) == NO_ERROR &&
3267            valueInt != 0) {
3268            ALOGV("Test command %s received", command.string());
3269            String8 target;
3270            if (param.get(String8("target"), target) != NO_ERROR) {
3271                target = "Manager";
3272            }
3273            if (param.getInt(String8("test_cmd_policy_output"), valueInt) == NO_ERROR) {
3274                param.remove(String8("test_cmd_policy_output"));
3275                mCurOutput = valueInt;
3276            }
3277            if (param.get(String8("test_cmd_policy_direct"), value) == NO_ERROR) {
3278                param.remove(String8("test_cmd_policy_direct"));
3279                if (value == "false") {
3280                    mDirectOutput = false;
3281                } else if (value == "true") {
3282                    mDirectOutput = true;
3283                }
3284            }
3285            if (param.getInt(String8("test_cmd_policy_input"), valueInt) == NO_ERROR) {
3286                param.remove(String8("test_cmd_policy_input"));
3287                mTestInput = valueInt;
3288            }
3289
3290            if (param.get(String8("test_cmd_policy_format"), value) == NO_ERROR) {
3291                param.remove(String8("test_cmd_policy_format"));
3292                int format = AUDIO_FORMAT_INVALID;
3293                if (value == "PCM 16 bits") {
3294                    format = AUDIO_FORMAT_PCM_16_BIT;
3295                } else if (value == "PCM 8 bits") {
3296                    format = AUDIO_FORMAT_PCM_8_BIT;
3297                } else if (value == "Compressed MP3") {
3298                    format = AUDIO_FORMAT_MP3;
3299                }
3300                if (format != AUDIO_FORMAT_INVALID) {
3301                    if (target == "Manager") {
3302                        mTestFormat = format;
3303                    } else if (mTestOutputs[mCurOutput] != 0) {
3304                        AudioParameter outputParam = AudioParameter();
3305                        outputParam.addInt(String8("format"), format);
3306                        mpClientInterface->setParameters(mTestOutputs[mCurOutput], outputParam.toString());
3307                    }
3308                }
3309            }
3310            if (param.get(String8("test_cmd_policy_channels"), value) == NO_ERROR) {
3311                param.remove(String8("test_cmd_policy_channels"));
3312                int channels = 0;
3313
3314                if (value == "Channels Stereo") {
3315                    channels =  AUDIO_CHANNEL_OUT_STEREO;
3316                } else if (value == "Channels Mono") {
3317                    channels =  AUDIO_CHANNEL_OUT_MONO;
3318                }
3319                if (channels != 0) {
3320                    if (target == "Manager") {
3321                        mTestChannels = channels;
3322                    } else if (mTestOutputs[mCurOutput] != 0) {
3323                        AudioParameter outputParam = AudioParameter();
3324                        outputParam.addInt(String8("channels"), channels);
3325                        mpClientInterface->setParameters(mTestOutputs[mCurOutput], outputParam.toString());
3326                    }
3327                }
3328            }
3329            if (param.getInt(String8("test_cmd_policy_sampleRate"), valueInt) == NO_ERROR) {
3330                param.remove(String8("test_cmd_policy_sampleRate"));
3331                if (valueInt >= 0 && valueInt <= 96000) {
3332                    int samplingRate = valueInt;
3333                    if (target == "Manager") {
3334                        mTestSamplingRate = samplingRate;
3335                    } else if (mTestOutputs[mCurOutput] != 0) {
3336                        AudioParameter outputParam = AudioParameter();
3337                        outputParam.addInt(String8("sampling_rate"), samplingRate);
3338                        mpClientInterface->setParameters(mTestOutputs[mCurOutput], outputParam.toString());
3339                    }
3340                }
3341            }
3342
3343            if (param.get(String8("test_cmd_policy_reopen"), value) == NO_ERROR) {
3344                param.remove(String8("test_cmd_policy_reopen"));
3345
3346                sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(mPrimaryOutput);
3347                mpClientInterface->closeOutput(mPrimaryOutput);
3348
3349                audio_module_handle_t moduleHandle = outputDesc->mModule->mHandle;
3350
3351                mOutputs.removeItem(mPrimaryOutput);
3352
3353                sp<AudioOutputDescriptor> outputDesc = new AudioOutputDescriptor(NULL);
3354                outputDesc->mDevice = AUDIO_DEVICE_OUT_SPEAKER;
3355                audio_config_t config = AUDIO_CONFIG_INITIALIZER;
3356                config.sample_rate = outputDesc->mSamplingRate;
3357                config.channel_mask = outputDesc->mChannelMask;
3358                config.format = outputDesc->mFormat;
3359                status_t status = mpClientInterface->openOutput(moduleHandle,
3360                                                                &mPrimaryOutput,
3361                                                                &config,
3362                                                                &outputDesc->mDevice,
3363                                                                String8(""),
3364                                                                &outputDesc->mLatency,
3365                                                                outputDesc->mFlags);
3366                if (status != NO_ERROR) {
3367                    ALOGE("Failed to reopen hardware output stream, "
3368                        "samplingRate: %d, format %d, channels %d",
3369                        outputDesc->mSamplingRate, outputDesc->mFormat, outputDesc->mChannelMask);
3370                } else {
3371                    outputDesc->mSamplingRate = config.sample_rate;
3372                    outputDesc->mChannelMask = config.channel_mask;
3373                    outputDesc->mFormat = config.format;
3374                    AudioParameter outputCmd = AudioParameter();
3375                    outputCmd.addInt(String8("set_id"), 0);
3376                    mpClientInterface->setParameters(mPrimaryOutput, outputCmd.toString());
3377                    addOutput(mPrimaryOutput, outputDesc);
3378                }
3379            }
3380
3381
3382            mpClientInterface->setParameters(0, String8("test_cmd_policy="));
3383        }
3384    }
3385    return false;
3386}
3387
3388void AudioPolicyManager::exit()
3389{
3390    {
3391        AutoMutex _l(mLock);
3392        requestExit();
3393        mWaitWorkCV.signal();
3394    }
3395    requestExitAndWait();
3396}
3397
3398int AudioPolicyManager::testOutputIndex(audio_io_handle_t output)
3399{
3400    for (int i = 0; i < NUM_TEST_OUTPUTS; i++) {
3401        if (output == mTestOutputs[i]) return i;
3402    }
3403    return 0;
3404}
3405#endif //AUDIO_POLICY_TEST
3406
3407// ---
3408
3409void AudioPolicyManager::addOutput(audio_io_handle_t output, sp<AudioOutputDescriptor> outputDesc)
3410{
3411    outputDesc->mIoHandle = output;
3412    outputDesc->mId = nextUniqueId();
3413    mOutputs.add(output, outputDesc);
3414    nextAudioPortGeneration();
3415}
3416
3417void AudioPolicyManager::addInput(audio_io_handle_t input, sp<AudioInputDescriptor> inputDesc)
3418{
3419    inputDesc->mIoHandle = input;
3420    inputDesc->mId = nextUniqueId();
3421    mInputs.add(input, inputDesc);
3422    nextAudioPortGeneration();
3423}
3424
3425void AudioPolicyManager::findIoHandlesByAddress(sp<AudioOutputDescriptor> desc /*in*/,
3426        const String8 address /*in*/,
3427        SortedVector<audio_io_handle_t>& outputs /*out*/) {
3428    // look for a match on the given address on the addresses of the outputs:
3429    // find the address by finding the patch that maps to this output
3430    ssize_t patchIdx = mAudioPatches.indexOfKey(desc->mPatchHandle);
3431    //ALOGV("    inspecting output %d (patch %d) for supported device=0x%x",
3432    //        outputIdx, patchIdx,  desc->mProfile->mSupportedDevices.types());
3433    if (patchIdx >= 0) {
3434        const sp<AudioPatch> patchDesc = mAudioPatches.valueAt(patchIdx);
3435        const int numSinks = patchDesc->mPatch.num_sinks;
3436        for (ssize_t j=0; j < numSinks; j++) {
3437            if (patchDesc->mPatch.sinks[j].type == AUDIO_PORT_TYPE_DEVICE) {
3438                const char* patchAddr =
3439                        patchDesc->mPatch.sinks[j].ext.device.address;
3440                if (strncmp(patchAddr,
3441                        address.string(), AUDIO_DEVICE_MAX_ADDRESS_LEN) == 0) {
3442                    ALOGV("findIoHandlesByAddress(): adding opened output %d on same address %s",
3443                            desc->mIoHandle,  patchDesc->mPatch.sinks[j].ext.device.address);
3444                    outputs.add(desc->mIoHandle);
3445                    break;
3446                }
3447            }
3448        }
3449    }
3450}
3451
3452status_t AudioPolicyManager::checkOutputsForDevice(const sp<DeviceDescriptor> devDesc,
3453                                                       audio_policy_dev_state_t state,
3454                                                       SortedVector<audio_io_handle_t>& outputs,
3455                                                       const String8 address)
3456{
3457    audio_devices_t device = devDesc->mDeviceType;
3458    sp<AudioOutputDescriptor> desc;
3459    // erase all current sample rates, formats and channel masks
3460    devDesc->clearCapabilities();
3461
3462    if (state == AUDIO_POLICY_DEVICE_STATE_AVAILABLE) {
3463        // first list already open outputs that can be routed to this device
3464        for (size_t i = 0; i < mOutputs.size(); i++) {
3465            desc = mOutputs.valueAt(i);
3466            if (!desc->isDuplicated() && (desc->mProfile->mSupportedDevices.types() & device)) {
3467                if (!deviceDistinguishesOnAddress(device)) {
3468                    ALOGV("checkOutputsForDevice(): adding opened output %d", mOutputs.keyAt(i));
3469                    outputs.add(mOutputs.keyAt(i));
3470                } else {
3471                    ALOGV("  checking address match due to device 0x%x", device);
3472                    findIoHandlesByAddress(desc, address, outputs);
3473                }
3474            }
3475        }
3476        // then look for output profiles that can be routed to this device
3477        SortedVector< sp<IOProfile> > profiles;
3478        for (size_t i = 0; i < mHwModules.size(); i++)
3479        {
3480            if (mHwModules[i]->mHandle == 0) {
3481                continue;
3482            }
3483            for (size_t j = 0; j < mHwModules[i]->mOutputProfiles.size(); j++)
3484            {
3485                sp<IOProfile> profile = mHwModules[i]->mOutputProfiles[j];
3486                if (profile->mSupportedDevices.types() & device) {
3487                    if (!deviceDistinguishesOnAddress(device) ||
3488                            address == profile->mSupportedDevices[0]->mAddress) {
3489                        profiles.add(profile);
3490                        ALOGV("checkOutputsForDevice(): adding profile %zu from module %zu", j, i);
3491                    }
3492                }
3493            }
3494        }
3495
3496        ALOGV("  found %d profiles, %d outputs", profiles.size(), outputs.size());
3497
3498        if (profiles.isEmpty() && outputs.isEmpty()) {
3499            ALOGW("checkOutputsForDevice(): No output available for device %04x", device);
3500            return BAD_VALUE;
3501        }
3502
3503        // open outputs for matching profiles if needed. Direct outputs are also opened to
3504        // query for dynamic parameters and will be closed later by setDeviceConnectionState()
3505        for (ssize_t profile_index = 0; profile_index < (ssize_t)profiles.size(); profile_index++) {
3506            sp<IOProfile> profile = profiles[profile_index];
3507
3508            // nothing to do if one output is already opened for this profile
3509            size_t j;
3510            for (j = 0; j < outputs.size(); j++) {
3511                desc = mOutputs.valueFor(outputs.itemAt(j));
3512                if (!desc->isDuplicated() && desc->mProfile == profile) {
3513                    // matching profile: save the sample rates, format and channel masks supported
3514                    // by the profile in our device descriptor
3515                    devDesc->importAudioPort(profile);
3516                    break;
3517                }
3518            }
3519            if (j != outputs.size()) {
3520                continue;
3521            }
3522
3523            ALOGV("opening output for device %08x with params %s profile %p",
3524                                                      device, address.string(), profile.get());
3525            desc = new AudioOutputDescriptor(profile);
3526            desc->mDevice = device;
3527            audio_config_t config = AUDIO_CONFIG_INITIALIZER;
3528            config.sample_rate = desc->mSamplingRate;
3529            config.channel_mask = desc->mChannelMask;
3530            config.format = desc->mFormat;
3531            config.offload_info.sample_rate = desc->mSamplingRate;
3532            config.offload_info.channel_mask = desc->mChannelMask;
3533            config.offload_info.format = desc->mFormat;
3534            audio_io_handle_t output = AUDIO_IO_HANDLE_NONE;
3535            status_t status = mpClientInterface->openOutput(profile->mModule->mHandle,
3536                                                            &output,
3537                                                            &config,
3538                                                            &desc->mDevice,
3539                                                            address,
3540                                                            &desc->mLatency,
3541                                                            desc->mFlags);
3542            if (status == NO_ERROR) {
3543                desc->mSamplingRate = config.sample_rate;
3544                desc->mChannelMask = config.channel_mask;
3545                desc->mFormat = config.format;
3546
3547                // Here is where the out_set_parameters() for card & device gets called
3548                if (!address.isEmpty()) {
3549                    char *param = audio_device_address_to_parameter(device, address);
3550                    mpClientInterface->setParameters(output, String8(param));
3551                    free(param);
3552                }
3553
3554                // Here is where we step through and resolve any "dynamic" fields
3555                String8 reply;
3556                char *value;
3557                if (profile->mSamplingRates[0] == 0) {
3558                    reply = mpClientInterface->getParameters(output,
3559                                            String8(AUDIO_PARAMETER_STREAM_SUP_SAMPLING_RATES));
3560                    ALOGV("checkOutputsForDevice() supported sampling rates %s",
3561                              reply.string());
3562                    value = strpbrk((char *)reply.string(), "=");
3563                    if (value != NULL) {
3564                        profile->loadSamplingRates(value + 1);
3565                    }
3566                }
3567                if (profile->mFormats[0] == AUDIO_FORMAT_DEFAULT) {
3568                    reply = mpClientInterface->getParameters(output,
3569                                                   String8(AUDIO_PARAMETER_STREAM_SUP_FORMATS));
3570                    ALOGV("checkOutputsForDevice() supported formats %s",
3571                              reply.string());
3572                    value = strpbrk((char *)reply.string(), "=");
3573                    if (value != NULL) {
3574                        profile->loadFormats(value + 1);
3575                    }
3576                }
3577                if (profile->mChannelMasks[0] == 0) {
3578                    reply = mpClientInterface->getParameters(output,
3579                                                  String8(AUDIO_PARAMETER_STREAM_SUP_CHANNELS));
3580                    ALOGV("checkOutputsForDevice() supported channel masks %s",
3581                              reply.string());
3582                    value = strpbrk((char *)reply.string(), "=");
3583                    if (value != NULL) {
3584                        profile->loadOutChannels(value + 1);
3585                    }
3586                }
3587                if (((profile->mSamplingRates[0] == 0) &&
3588                         (profile->mSamplingRates.size() < 2)) ||
3589                     ((profile->mFormats[0] == AUDIO_FORMAT_DEFAULT) &&
3590                         (profile->mFormats.size() < 2)) ||
3591                     ((profile->mChannelMasks[0] == 0) &&
3592                         (profile->mChannelMasks.size() < 2))) {
3593                    ALOGW("checkOutputsForDevice() missing param");
3594                    mpClientInterface->closeOutput(output);
3595                    output = AUDIO_IO_HANDLE_NONE;
3596                } else if (profile->mSamplingRates[0] == 0 || profile->mFormats[0] == 0 ||
3597                            profile->mChannelMasks[0] == 0) {
3598                    mpClientInterface->closeOutput(output);
3599                    config.sample_rate = profile->pickSamplingRate();
3600                    config.channel_mask = profile->pickChannelMask();
3601                    config.format = profile->pickFormat();
3602                    config.offload_info.sample_rate = config.sample_rate;
3603                    config.offload_info.channel_mask = config.channel_mask;
3604                    config.offload_info.format = config.format;
3605                    status = mpClientInterface->openOutput(profile->mModule->mHandle,
3606                                                           &output,
3607                                                           &config,
3608                                                           &desc->mDevice,
3609                                                           address,
3610                                                           &desc->mLatency,
3611                                                           desc->mFlags);
3612                    if (status == NO_ERROR) {
3613                        desc->mSamplingRate = config.sample_rate;
3614                        desc->mChannelMask = config.channel_mask;
3615                        desc->mFormat = config.format;
3616                    } else {
3617                        output = AUDIO_IO_HANDLE_NONE;
3618                    }
3619                }
3620
3621                if (output != AUDIO_IO_HANDLE_NONE) {
3622                    addOutput(output, desc);
3623                    if (deviceDistinguishesOnAddress(device) && address != "0") {
3624                        ssize_t index = mPolicyMixes.indexOfKey(address);
3625                        if (index >= 0) {
3626                            mPolicyMixes[index]->mOutput = desc;
3627                            desc->mPolicyMix = &mPolicyMixes[index]->mMix;
3628                        } else {
3629                            ALOGE("checkOutputsForDevice() cannot find policy for address %s",
3630                                  address.string());
3631                        }
3632                    } else if ((desc->mFlags & AUDIO_OUTPUT_FLAG_DIRECT) == 0) {
3633                        // no duplicated output for direct outputs and
3634                        // outputs used by dynamic policy mixes
3635                        audio_io_handle_t duplicatedOutput = AUDIO_IO_HANDLE_NONE;
3636
3637                        // set initial stream volume for device
3638                        applyStreamVolumes(output, device, 0, true);
3639
3640                        //TODO: configure audio effect output stage here
3641
3642                        // open a duplicating output thread for the new output and the primary output
3643                        duplicatedOutput = mpClientInterface->openDuplicateOutput(output,
3644                                                                                  mPrimaryOutput);
3645                        if (duplicatedOutput != AUDIO_IO_HANDLE_NONE) {
3646                            // add duplicated output descriptor
3647                            sp<AudioOutputDescriptor> dupOutputDesc =
3648                                    new AudioOutputDescriptor(NULL);
3649                            dupOutputDesc->mOutput1 = mOutputs.valueFor(mPrimaryOutput);
3650                            dupOutputDesc->mOutput2 = mOutputs.valueFor(output);
3651                            dupOutputDesc->mSamplingRate = desc->mSamplingRate;
3652                            dupOutputDesc->mFormat = desc->mFormat;
3653                            dupOutputDesc->mChannelMask = desc->mChannelMask;
3654                            dupOutputDesc->mLatency = desc->mLatency;
3655                            addOutput(duplicatedOutput, dupOutputDesc);
3656                            applyStreamVolumes(duplicatedOutput, device, 0, true);
3657                        } else {
3658                            ALOGW("checkOutputsForDevice() could not open dup output for %d and %d",
3659                                    mPrimaryOutput, output);
3660                            mpClientInterface->closeOutput(output);
3661                            mOutputs.removeItem(output);
3662                            nextAudioPortGeneration();
3663                            output = AUDIO_IO_HANDLE_NONE;
3664                        }
3665                    }
3666                }
3667            } else {
3668                output = AUDIO_IO_HANDLE_NONE;
3669            }
3670            if (output == AUDIO_IO_HANDLE_NONE) {
3671                ALOGW("checkOutputsForDevice() could not open output for device %x", device);
3672                profiles.removeAt(profile_index);
3673                profile_index--;
3674            } else {
3675                outputs.add(output);
3676                devDesc->importAudioPort(profile);
3677
3678                if (deviceDistinguishesOnAddress(device)) {
3679                    ALOGV("checkOutputsForDevice(): setOutputDevice(dev=0x%x, addr=%s)",
3680                            device, address.string());
3681                    setOutputDevice(output, device, true/*force*/, 0/*delay*/,
3682                            NULL/*patch handle*/, address.string());
3683                }
3684                ALOGV("checkOutputsForDevice(): adding output %d", output);
3685            }
3686        }
3687
3688        if (profiles.isEmpty()) {
3689            ALOGW("checkOutputsForDevice(): No output available for device %04x", device);
3690            return BAD_VALUE;
3691        }
3692    } else { // Disconnect
3693        // check if one opened output is not needed any more after disconnecting one device
3694        for (size_t i = 0; i < mOutputs.size(); i++) {
3695            desc = mOutputs.valueAt(i);
3696            if (!desc->isDuplicated()) {
3697                // exact match on device
3698                if (deviceDistinguishesOnAddress(device) &&
3699                        (desc->mProfile->mSupportedDevices.types() == device)) {
3700                    findIoHandlesByAddress(desc, address, outputs);
3701                } else if (!(desc->mProfile->mSupportedDevices.types()
3702                        & mAvailableOutputDevices.types())) {
3703                    ALOGV("checkOutputsForDevice(): disconnecting adding output %d",
3704                            mOutputs.keyAt(i));
3705                    outputs.add(mOutputs.keyAt(i));
3706                }
3707            }
3708        }
3709        // Clear any profiles associated with the disconnected device.
3710        for (size_t i = 0; i < mHwModules.size(); i++)
3711        {
3712            if (mHwModules[i]->mHandle == 0) {
3713                continue;
3714            }
3715            for (size_t j = 0; j < mHwModules[i]->mOutputProfiles.size(); j++)
3716            {
3717                sp<IOProfile> profile = mHwModules[i]->mOutputProfiles[j];
3718                if (profile->mSupportedDevices.types() & device) {
3719                    ALOGV("checkOutputsForDevice(): "
3720                            "clearing direct output profile %zu on module %zu", j, i);
3721                    if (profile->mSamplingRates[0] == 0) {
3722                        profile->mSamplingRates.clear();
3723                        profile->mSamplingRates.add(0);
3724                    }
3725                    if (profile->mFormats[0] == AUDIO_FORMAT_DEFAULT) {
3726                        profile->mFormats.clear();
3727                        profile->mFormats.add(AUDIO_FORMAT_DEFAULT);
3728                    }
3729                    if (profile->mChannelMasks[0] == 0) {
3730                        profile->mChannelMasks.clear();
3731                        profile->mChannelMasks.add(0);
3732                    }
3733                }
3734            }
3735        }
3736    }
3737    return NO_ERROR;
3738}
3739
3740status_t AudioPolicyManager::checkInputsForDevice(audio_devices_t device,
3741                                                      audio_policy_dev_state_t state,
3742                                                      SortedVector<audio_io_handle_t>& inputs,
3743                                                      const String8 address)
3744{
3745    sp<AudioInputDescriptor> desc;
3746    if (state == AUDIO_POLICY_DEVICE_STATE_AVAILABLE) {
3747        // first list already open inputs that can be routed to this device
3748        for (size_t input_index = 0; input_index < mInputs.size(); input_index++) {
3749            desc = mInputs.valueAt(input_index);
3750            if (desc->mProfile->mSupportedDevices.types() & (device & ~AUDIO_DEVICE_BIT_IN)) {
3751                ALOGV("checkInputsForDevice(): adding opened input %d", mInputs.keyAt(input_index));
3752               inputs.add(mInputs.keyAt(input_index));
3753            }
3754        }
3755
3756        // then look for input profiles that can be routed to this device
3757        SortedVector< sp<IOProfile> > profiles;
3758        for (size_t module_idx = 0; module_idx < mHwModules.size(); module_idx++)
3759        {
3760            if (mHwModules[module_idx]->mHandle == 0) {
3761                continue;
3762            }
3763            for (size_t profile_index = 0;
3764                 profile_index < mHwModules[module_idx]->mInputProfiles.size();
3765                 profile_index++)
3766            {
3767                sp<IOProfile> profile = mHwModules[module_idx]->mInputProfiles[profile_index];
3768
3769                if (profile->mSupportedDevices.types() & (device & ~AUDIO_DEVICE_BIT_IN)) {
3770                    if (!deviceDistinguishesOnAddress(device) ||
3771                            address == profile->mSupportedDevices[0]->mAddress) {
3772                        profiles.add(profile);
3773                        ALOGV("checkInputsForDevice(): adding profile %zu from module %zu",
3774                              profile_index, module_idx);
3775                    }
3776                }
3777            }
3778        }
3779
3780        if (profiles.isEmpty() && inputs.isEmpty()) {
3781            ALOGW("checkInputsForDevice(): No input available for device 0x%X", device);
3782            return BAD_VALUE;
3783        }
3784
3785        // open inputs for matching profiles if needed. Direct inputs are also opened to
3786        // query for dynamic parameters and will be closed later by setDeviceConnectionState()
3787        for (ssize_t profile_index = 0; profile_index < (ssize_t)profiles.size(); profile_index++) {
3788
3789            sp<IOProfile> profile = profiles[profile_index];
3790            // nothing to do if one input is already opened for this profile
3791            size_t input_index;
3792            for (input_index = 0; input_index < mInputs.size(); input_index++) {
3793                desc = mInputs.valueAt(input_index);
3794                if (desc->mProfile == profile) {
3795                    break;
3796                }
3797            }
3798            if (input_index != mInputs.size()) {
3799                continue;
3800            }
3801
3802            ALOGV("opening input for device 0x%X with params %s", device, address.string());
3803            desc = new AudioInputDescriptor(profile);
3804            desc->mDevice = device;
3805            audio_config_t config = AUDIO_CONFIG_INITIALIZER;
3806            config.sample_rate = desc->mSamplingRate;
3807            config.channel_mask = desc->mChannelMask;
3808            config.format = desc->mFormat;
3809            audio_io_handle_t input = AUDIO_IO_HANDLE_NONE;
3810            status_t status = mpClientInterface->openInput(profile->mModule->mHandle,
3811                                                           &input,
3812                                                           &config,
3813                                                           &desc->mDevice,
3814                                                           address,
3815                                                           AUDIO_SOURCE_MIC,
3816                                                           AUDIO_INPUT_FLAG_NONE /*FIXME*/);
3817
3818            if (status == NO_ERROR) {
3819                desc->mSamplingRate = config.sample_rate;
3820                desc->mChannelMask = config.channel_mask;
3821                desc->mFormat = config.format;
3822
3823                if (!address.isEmpty()) {
3824                    char *param = audio_device_address_to_parameter(device, address);
3825                    mpClientInterface->setParameters(input, String8(param));
3826                    free(param);
3827                }
3828
3829                // Here is where we step through and resolve any "dynamic" fields
3830                String8 reply;
3831                char *value;
3832                if (profile->mSamplingRates[0] == 0) {
3833                    reply = mpClientInterface->getParameters(input,
3834                                            String8(AUDIO_PARAMETER_STREAM_SUP_SAMPLING_RATES));
3835                    ALOGV("checkInputsForDevice() direct input sup sampling rates %s",
3836                              reply.string());
3837                    value = strpbrk((char *)reply.string(), "=");
3838                    if (value != NULL) {
3839                        profile->loadSamplingRates(value + 1);
3840                    }
3841                }
3842                if (profile->mFormats[0] == AUDIO_FORMAT_DEFAULT) {
3843                    reply = mpClientInterface->getParameters(input,
3844                                                   String8(AUDIO_PARAMETER_STREAM_SUP_FORMATS));
3845                    ALOGV("checkInputsForDevice() direct input sup formats %s", reply.string());
3846                    value = strpbrk((char *)reply.string(), "=");
3847                    if (value != NULL) {
3848                        profile->loadFormats(value + 1);
3849                    }
3850                }
3851                if (profile->mChannelMasks[0] == 0) {
3852                    reply = mpClientInterface->getParameters(input,
3853                                                  String8(AUDIO_PARAMETER_STREAM_SUP_CHANNELS));
3854                    ALOGV("checkInputsForDevice() direct input sup channel masks %s",
3855                              reply.string());
3856                    value = strpbrk((char *)reply.string(), "=");
3857                    if (value != NULL) {
3858                        profile->loadInChannels(value + 1);
3859                    }
3860                }
3861                if (((profile->mSamplingRates[0] == 0) && (profile->mSamplingRates.size() < 2)) ||
3862                     ((profile->mFormats[0] == 0) && (profile->mFormats.size() < 2)) ||
3863                     ((profile->mChannelMasks[0] == 0) && (profile->mChannelMasks.size() < 2))) {
3864                    ALOGW("checkInputsForDevice() direct input missing param");
3865                    mpClientInterface->closeInput(input);
3866                    input = AUDIO_IO_HANDLE_NONE;
3867                }
3868
3869                if (input != 0) {
3870                    addInput(input, desc);
3871                }
3872            } // endif input != 0
3873
3874            if (input == AUDIO_IO_HANDLE_NONE) {
3875                ALOGW("checkInputsForDevice() could not open input for device 0x%X", device);
3876                profiles.removeAt(profile_index);
3877                profile_index--;
3878            } else {
3879                inputs.add(input);
3880                ALOGV("checkInputsForDevice(): adding input %d", input);
3881            }
3882        } // end scan profiles
3883
3884        if (profiles.isEmpty()) {
3885            ALOGW("checkInputsForDevice(): No input available for device 0x%X", device);
3886            return BAD_VALUE;
3887        }
3888    } else {
3889        // Disconnect
3890        // check if one opened input is not needed any more after disconnecting one device
3891        for (size_t input_index = 0; input_index < mInputs.size(); input_index++) {
3892            desc = mInputs.valueAt(input_index);
3893            if (!(desc->mProfile->mSupportedDevices.types() & mAvailableInputDevices.types() &
3894                    ~AUDIO_DEVICE_BIT_IN)) {
3895                ALOGV("checkInputsForDevice(): disconnecting adding input %d",
3896                      mInputs.keyAt(input_index));
3897                inputs.add(mInputs.keyAt(input_index));
3898            }
3899        }
3900        // Clear any profiles associated with the disconnected device.
3901        for (size_t module_index = 0; module_index < mHwModules.size(); module_index++) {
3902            if (mHwModules[module_index]->mHandle == 0) {
3903                continue;
3904            }
3905            for (size_t profile_index = 0;
3906                 profile_index < mHwModules[module_index]->mInputProfiles.size();
3907                 profile_index++) {
3908                sp<IOProfile> profile = mHwModules[module_index]->mInputProfiles[profile_index];
3909                if (profile->mSupportedDevices.types() & device & ~AUDIO_DEVICE_BIT_IN) {
3910                    ALOGV("checkInputsForDevice(): clearing direct input profile %zu on module %zu",
3911                          profile_index, module_index);
3912                    if (profile->mSamplingRates[0] == 0) {
3913                        profile->mSamplingRates.clear();
3914                        profile->mSamplingRates.add(0);
3915                    }
3916                    if (profile->mFormats[0] == AUDIO_FORMAT_DEFAULT) {
3917                        profile->mFormats.clear();
3918                        profile->mFormats.add(AUDIO_FORMAT_DEFAULT);
3919                    }
3920                    if (profile->mChannelMasks[0] == 0) {
3921                        profile->mChannelMasks.clear();
3922                        profile->mChannelMasks.add(0);
3923                    }
3924                }
3925            }
3926        }
3927    } // end disconnect
3928
3929    return NO_ERROR;
3930}
3931
3932
3933void AudioPolicyManager::closeOutput(audio_io_handle_t output)
3934{
3935    ALOGV("closeOutput(%d)", output);
3936
3937    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
3938    if (outputDesc == NULL) {
3939        ALOGW("closeOutput() unknown output %d", output);
3940        return;
3941    }
3942
3943    for (size_t i = 0; i < mPolicyMixes.size(); i++) {
3944        if (mPolicyMixes[i]->mOutput == outputDesc) {
3945            mPolicyMixes[i]->mOutput.clear();
3946        }
3947    }
3948
3949    // look for duplicated outputs connected to the output being removed.
3950    for (size_t i = 0; i < mOutputs.size(); i++) {
3951        sp<AudioOutputDescriptor> dupOutputDesc = mOutputs.valueAt(i);
3952        if (dupOutputDesc->isDuplicated() &&
3953                (dupOutputDesc->mOutput1 == outputDesc ||
3954                dupOutputDesc->mOutput2 == outputDesc)) {
3955            sp<AudioOutputDescriptor> outputDesc2;
3956            if (dupOutputDesc->mOutput1 == outputDesc) {
3957                outputDesc2 = dupOutputDesc->mOutput2;
3958            } else {
3959                outputDesc2 = dupOutputDesc->mOutput1;
3960            }
3961            // As all active tracks on duplicated output will be deleted,
3962            // and as they were also referenced on the other output, the reference
3963            // count for their stream type must be adjusted accordingly on
3964            // the other output.
3965            for (int j = 0; j < AUDIO_STREAM_CNT; j++) {
3966                int refCount = dupOutputDesc->mRefCount[j];
3967                outputDesc2->changeRefCount((audio_stream_type_t)j,-refCount);
3968            }
3969            audio_io_handle_t duplicatedOutput = mOutputs.keyAt(i);
3970            ALOGV("closeOutput() closing also duplicated output %d", duplicatedOutput);
3971
3972            mpClientInterface->closeOutput(duplicatedOutput);
3973            mOutputs.removeItem(duplicatedOutput);
3974        }
3975    }
3976
3977    nextAudioPortGeneration();
3978
3979    ssize_t index = mAudioPatches.indexOfKey(outputDesc->mPatchHandle);
3980    if (index >= 0) {
3981        sp<AudioPatch> patchDesc = mAudioPatches.valueAt(index);
3982        status_t status = mpClientInterface->releaseAudioPatch(patchDesc->mAfPatchHandle, 0);
3983        mAudioPatches.removeItemsAt(index);
3984        mpClientInterface->onAudioPatchListUpdate();
3985    }
3986
3987    AudioParameter param;
3988    param.add(String8("closing"), String8("true"));
3989    mpClientInterface->setParameters(output, param.toString());
3990
3991    mpClientInterface->closeOutput(output);
3992    mOutputs.removeItem(output);
3993    mPreviousOutputs = mOutputs;
3994}
3995
3996void AudioPolicyManager::closeInput(audio_io_handle_t input)
3997{
3998    ALOGV("closeInput(%d)", input);
3999
4000    sp<AudioInputDescriptor> inputDesc = mInputs.valueFor(input);
4001    if (inputDesc == NULL) {
4002        ALOGW("closeInput() unknown input %d", input);
4003        return;
4004    }
4005
4006    nextAudioPortGeneration();
4007
4008    ssize_t index = mAudioPatches.indexOfKey(inputDesc->mPatchHandle);
4009    if (index >= 0) {
4010        sp<AudioPatch> patchDesc = mAudioPatches.valueAt(index);
4011        status_t status = mpClientInterface->releaseAudioPatch(patchDesc->mAfPatchHandle, 0);
4012        mAudioPatches.removeItemsAt(index);
4013        mpClientInterface->onAudioPatchListUpdate();
4014    }
4015
4016    mpClientInterface->closeInput(input);
4017    mInputs.removeItem(input);
4018}
4019
4020SortedVector<audio_io_handle_t> AudioPolicyManager::getOutputsForDevice(audio_devices_t device,
4021                        DefaultKeyedVector<audio_io_handle_t, sp<AudioOutputDescriptor> > openOutputs)
4022{
4023    SortedVector<audio_io_handle_t> outputs;
4024
4025    ALOGVV("getOutputsForDevice() device %04x", device);
4026    for (size_t i = 0; i < openOutputs.size(); i++) {
4027        ALOGVV("output %d isDuplicated=%d device=%04x",
4028                i, openOutputs.valueAt(i)->isDuplicated(), openOutputs.valueAt(i)->supportedDevices());
4029        if ((device & openOutputs.valueAt(i)->supportedDevices()) == device) {
4030            ALOGVV("getOutputsForDevice() found output %d", openOutputs.keyAt(i));
4031            outputs.add(openOutputs.keyAt(i));
4032        }
4033    }
4034    return outputs;
4035}
4036
4037bool AudioPolicyManager::vectorsEqual(SortedVector<audio_io_handle_t>& outputs1,
4038                                   SortedVector<audio_io_handle_t>& outputs2)
4039{
4040    if (outputs1.size() != outputs2.size()) {
4041        return false;
4042    }
4043    for (size_t i = 0; i < outputs1.size(); i++) {
4044        if (outputs1[i] != outputs2[i]) {
4045            return false;
4046        }
4047    }
4048    return true;
4049}
4050
4051void AudioPolicyManager::checkOutputForStrategy(routing_strategy strategy)
4052{
4053    audio_devices_t oldDevice = getDeviceForStrategy(strategy, true /*fromCache*/);
4054    audio_devices_t newDevice = getDeviceForStrategy(strategy, false /*fromCache*/);
4055    SortedVector<audio_io_handle_t> srcOutputs = getOutputsForDevice(oldDevice, mPreviousOutputs);
4056    SortedVector<audio_io_handle_t> dstOutputs = getOutputsForDevice(newDevice, mOutputs);
4057
4058    if (!vectorsEqual(srcOutputs,dstOutputs)) {
4059        ALOGV("checkOutputForStrategy() strategy %d, moving from output %d to output %d",
4060              strategy, srcOutputs[0], dstOutputs[0]);
4061        // mute strategy while moving tracks from one output to another
4062        for (size_t i = 0; i < srcOutputs.size(); i++) {
4063            sp<AudioOutputDescriptor> desc = mOutputs.valueFor(srcOutputs[i]);
4064            if (desc->isStrategyActive(strategy)) {
4065                setStrategyMute(strategy, true, srcOutputs[i]);
4066                setStrategyMute(strategy, false, srcOutputs[i], MUTE_TIME_MS, newDevice);
4067            }
4068        }
4069
4070        // Move effects associated to this strategy from previous output to new output
4071        if (strategy == STRATEGY_MEDIA) {
4072            audio_io_handle_t fxOutput = selectOutputForEffects(dstOutputs);
4073            SortedVector<audio_io_handle_t> moved;
4074            for (size_t i = 0; i < mEffects.size(); i++) {
4075                sp<EffectDescriptor> effectDesc = mEffects.valueAt(i);
4076                if (effectDesc->mSession == AUDIO_SESSION_OUTPUT_MIX &&
4077                        effectDesc->mIo != fxOutput) {
4078                    if (moved.indexOf(effectDesc->mIo) < 0) {
4079                        ALOGV("checkOutputForStrategy() moving effect %d to output %d",
4080                              mEffects.keyAt(i), fxOutput);
4081                        mpClientInterface->moveEffects(AUDIO_SESSION_OUTPUT_MIX, effectDesc->mIo,
4082                                                       fxOutput);
4083                        moved.add(effectDesc->mIo);
4084                    }
4085                    effectDesc->mIo = fxOutput;
4086                }
4087            }
4088        }
4089        // Move tracks associated to this strategy from previous output to new output
4090        for (int i = 0; i < AUDIO_STREAM_CNT; i++) {
4091            if (i == AUDIO_STREAM_PATCH) {
4092                continue;
4093            }
4094            if (getStrategy((audio_stream_type_t)i) == strategy) {
4095                mpClientInterface->invalidateStream((audio_stream_type_t)i);
4096            }
4097        }
4098    }
4099}
4100
4101void AudioPolicyManager::checkOutputForAllStrategies()
4102{
4103    if (mForceUse[AUDIO_POLICY_FORCE_FOR_SYSTEM] == AUDIO_POLICY_FORCE_SYSTEM_ENFORCED)
4104        checkOutputForStrategy(STRATEGY_ENFORCED_AUDIBLE);
4105    checkOutputForStrategy(STRATEGY_PHONE);
4106    if (mForceUse[AUDIO_POLICY_FORCE_FOR_SYSTEM] != AUDIO_POLICY_FORCE_SYSTEM_ENFORCED)
4107        checkOutputForStrategy(STRATEGY_ENFORCED_AUDIBLE);
4108    checkOutputForStrategy(STRATEGY_SONIFICATION);
4109    checkOutputForStrategy(STRATEGY_SONIFICATION_RESPECTFUL);
4110    checkOutputForStrategy(STRATEGY_ACCESSIBILITY);
4111    checkOutputForStrategy(STRATEGY_MEDIA);
4112    checkOutputForStrategy(STRATEGY_DTMF);
4113    checkOutputForStrategy(STRATEGY_REROUTING);
4114}
4115
4116audio_io_handle_t AudioPolicyManager::getA2dpOutput()
4117{
4118    for (size_t i = 0; i < mOutputs.size(); i++) {
4119        sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(i);
4120        if (!outputDesc->isDuplicated() && outputDesc->device() & AUDIO_DEVICE_OUT_ALL_A2DP) {
4121            return mOutputs.keyAt(i);
4122        }
4123    }
4124
4125    return 0;
4126}
4127
4128void AudioPolicyManager::checkA2dpSuspend()
4129{
4130    audio_io_handle_t a2dpOutput = getA2dpOutput();
4131    if (a2dpOutput == 0) {
4132        mA2dpSuspended = false;
4133        return;
4134    }
4135
4136    bool isScoConnected =
4137            ((mAvailableInputDevices.types() & AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET &
4138                    ~AUDIO_DEVICE_BIT_IN) != 0) ||
4139            ((mAvailableOutputDevices.types() & AUDIO_DEVICE_OUT_ALL_SCO) != 0);
4140    // suspend A2DP output if:
4141    //      (NOT already suspended) &&
4142    //      ((SCO device is connected &&
4143    //       (forced usage for communication || for record is SCO))) ||
4144    //      (phone state is ringing || in call)
4145    //
4146    // restore A2DP output if:
4147    //      (Already suspended) &&
4148    //      ((SCO device is NOT connected ||
4149    //       (forced usage NOT for communication && NOT for record is SCO))) &&
4150    //      (phone state is NOT ringing && NOT in call)
4151    //
4152    if (mA2dpSuspended) {
4153        if ((!isScoConnected ||
4154             ((mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION] != AUDIO_POLICY_FORCE_BT_SCO) &&
4155              (mForceUse[AUDIO_POLICY_FORCE_FOR_RECORD] != AUDIO_POLICY_FORCE_BT_SCO))) &&
4156             ((mPhoneState != AUDIO_MODE_IN_CALL) &&
4157              (mPhoneState != AUDIO_MODE_RINGTONE))) {
4158
4159            mpClientInterface->restoreOutput(a2dpOutput);
4160            mA2dpSuspended = false;
4161        }
4162    } else {
4163        if ((isScoConnected &&
4164             ((mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION] == AUDIO_POLICY_FORCE_BT_SCO) ||
4165              (mForceUse[AUDIO_POLICY_FORCE_FOR_RECORD] == AUDIO_POLICY_FORCE_BT_SCO))) ||
4166             ((mPhoneState == AUDIO_MODE_IN_CALL) ||
4167              (mPhoneState == AUDIO_MODE_RINGTONE))) {
4168
4169            mpClientInterface->suspendOutput(a2dpOutput);
4170            mA2dpSuspended = true;
4171        }
4172    }
4173}
4174
4175audio_devices_t AudioPolicyManager::getNewOutputDevice(audio_io_handle_t output, bool fromCache)
4176{
4177    audio_devices_t device = AUDIO_DEVICE_NONE;
4178
4179    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
4180
4181    ssize_t index = mAudioPatches.indexOfKey(outputDesc->mPatchHandle);
4182    if (index >= 0) {
4183        sp<AudioPatch> patchDesc = mAudioPatches.valueAt(index);
4184        if (patchDesc->mUid != mUidCached) {
4185            ALOGV("getNewOutputDevice() device %08x forced by patch %d",
4186                  outputDesc->device(), outputDesc->mPatchHandle);
4187            return outputDesc->device();
4188        }
4189    }
4190
4191    // check the following by order of priority to request a routing change if necessary:
4192    // 1: the strategy enforced audible is active and enforced on the output:
4193    //      use device for strategy enforced audible
4194    // 2: we are in call or the strategy phone is active on the output:
4195    //      use device for strategy phone
4196    // 3: the strategy for enforced audible is active but not enforced on the output:
4197    //      use the device for strategy enforced audible
4198    // 4: the strategy sonification is active on the output:
4199    //      use device for strategy sonification
4200    // 5: the strategy "respectful" sonification is active on the output:
4201    //      use device for strategy "respectful" sonification
4202    // 6: the strategy accessibility is active on the output:
4203    //      use device for strategy accessibility
4204    // 7: the strategy media is active on the output:
4205    //      use device for strategy media
4206    // 8: the strategy DTMF is active on the output:
4207    //      use device for strategy DTMF
4208    // 9: the strategy for beacon, a.k.a. "transmitted through speaker" is active on the output:
4209    //      use device for strategy t-t-s
4210    if (outputDesc->isStrategyActive(STRATEGY_ENFORCED_AUDIBLE) &&
4211        mForceUse[AUDIO_POLICY_FORCE_FOR_SYSTEM] == AUDIO_POLICY_FORCE_SYSTEM_ENFORCED) {
4212        device = getDeviceForStrategy(STRATEGY_ENFORCED_AUDIBLE, fromCache);
4213    } else if (isInCall() ||
4214                    outputDesc->isStrategyActive(STRATEGY_PHONE)) {
4215        device = getDeviceForStrategy(STRATEGY_PHONE, fromCache);
4216    } else if (outputDesc->isStrategyActive(STRATEGY_ENFORCED_AUDIBLE)) {
4217        device = getDeviceForStrategy(STRATEGY_ENFORCED_AUDIBLE, fromCache);
4218    } else if (outputDesc->isStrategyActive(STRATEGY_SONIFICATION)) {
4219        device = getDeviceForStrategy(STRATEGY_SONIFICATION, fromCache);
4220    } else if (outputDesc->isStrategyActive(STRATEGY_SONIFICATION_RESPECTFUL)) {
4221        device = getDeviceForStrategy(STRATEGY_SONIFICATION_RESPECTFUL, fromCache);
4222    } else if (outputDesc->isStrategyActive(STRATEGY_ACCESSIBILITY)) {
4223        device = getDeviceForStrategy(STRATEGY_ACCESSIBILITY, fromCache);
4224    } else if (outputDesc->isStrategyActive(STRATEGY_MEDIA)) {
4225        device = getDeviceForStrategy(STRATEGY_MEDIA, fromCache);
4226    } else if (outputDesc->isStrategyActive(STRATEGY_DTMF)) {
4227        device = getDeviceForStrategy(STRATEGY_DTMF, fromCache);
4228    } else if (outputDesc->isStrategyActive(STRATEGY_TRANSMITTED_THROUGH_SPEAKER)) {
4229        device = getDeviceForStrategy(STRATEGY_TRANSMITTED_THROUGH_SPEAKER, fromCache);
4230    } else if (outputDesc->isStrategyActive(STRATEGY_REROUTING)) {
4231        device = getDeviceForStrategy(STRATEGY_REROUTING, fromCache);
4232    }
4233
4234    ALOGV("getNewOutputDevice() selected device %x", device);
4235    return device;
4236}
4237
4238audio_devices_t AudioPolicyManager::getNewInputDevice(audio_io_handle_t input)
4239{
4240    sp<AudioInputDescriptor> inputDesc = mInputs.valueFor(input);
4241
4242    ssize_t index = mAudioPatches.indexOfKey(inputDesc->mPatchHandle);
4243    if (index >= 0) {
4244        sp<AudioPatch> patchDesc = mAudioPatches.valueAt(index);
4245        if (patchDesc->mUid != mUidCached) {
4246            ALOGV("getNewInputDevice() device %08x forced by patch %d",
4247                  inputDesc->mDevice, inputDesc->mPatchHandle);
4248            return inputDesc->mDevice;
4249        }
4250    }
4251
4252    audio_devices_t device = getDeviceAndMixForInputSource(inputDesc->mInputSource);
4253
4254    ALOGV("getNewInputDevice() selected device %x", device);
4255    return device;
4256}
4257
4258uint32_t AudioPolicyManager::getStrategyForStream(audio_stream_type_t stream) {
4259    return (uint32_t)getStrategy(stream);
4260}
4261
4262audio_devices_t AudioPolicyManager::getDevicesForStream(audio_stream_type_t stream) {
4263    // By checking the range of stream before calling getStrategy, we avoid
4264    // getStrategy's behavior for invalid streams.  getStrategy would do a ALOGE
4265    // and then return STRATEGY_MEDIA, but we want to return the empty set.
4266    if (stream < (audio_stream_type_t) 0 || stream >= AUDIO_STREAM_PUBLIC_CNT) {
4267        return AUDIO_DEVICE_NONE;
4268    }
4269    audio_devices_t devices;
4270    AudioPolicyManager::routing_strategy strategy = getStrategy(stream);
4271    devices = getDeviceForStrategy(strategy, true /*fromCache*/);
4272    SortedVector<audio_io_handle_t> outputs = getOutputsForDevice(devices, mOutputs);
4273    for (size_t i = 0; i < outputs.size(); i++) {
4274        sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(outputs[i]);
4275        if (outputDesc->isStrategyActive(strategy)) {
4276            devices = outputDesc->device();
4277            break;
4278        }
4279    }
4280
4281    /*Filter SPEAKER_SAFE out of results, as AudioService doesn't know about it
4282      and doesn't really need to.*/
4283    if (devices & AUDIO_DEVICE_OUT_SPEAKER_SAFE) {
4284        devices |= AUDIO_DEVICE_OUT_SPEAKER;
4285        devices &= ~AUDIO_DEVICE_OUT_SPEAKER_SAFE;
4286    }
4287
4288    return devices;
4289}
4290
4291AudioPolicyManager::routing_strategy AudioPolicyManager::getStrategy(
4292        audio_stream_type_t stream) {
4293
4294    ALOG_ASSERT(stream != AUDIO_STREAM_PATCH,"getStrategy() called for AUDIO_STREAM_PATCH");
4295
4296    // stream to strategy mapping
4297    switch (stream) {
4298    case AUDIO_STREAM_VOICE_CALL:
4299    case AUDIO_STREAM_BLUETOOTH_SCO:
4300        return STRATEGY_PHONE;
4301    case AUDIO_STREAM_RING:
4302    case AUDIO_STREAM_ALARM:
4303        return STRATEGY_SONIFICATION;
4304    case AUDIO_STREAM_NOTIFICATION:
4305        return STRATEGY_SONIFICATION_RESPECTFUL;
4306    case AUDIO_STREAM_DTMF:
4307        return STRATEGY_DTMF;
4308    default:
4309        ALOGE("unknown stream type %d", stream);
4310    case AUDIO_STREAM_SYSTEM:
4311        // NOTE: SYSTEM stream uses MEDIA strategy because muting music and switching outputs
4312        // while key clicks are played produces a poor result
4313    case AUDIO_STREAM_MUSIC:
4314        return STRATEGY_MEDIA;
4315    case AUDIO_STREAM_ENFORCED_AUDIBLE:
4316        return STRATEGY_ENFORCED_AUDIBLE;
4317    case AUDIO_STREAM_TTS:
4318        return STRATEGY_TRANSMITTED_THROUGH_SPEAKER;
4319    case AUDIO_STREAM_ACCESSIBILITY:
4320        return STRATEGY_ACCESSIBILITY;
4321    case AUDIO_STREAM_REROUTING:
4322        return STRATEGY_REROUTING;
4323    }
4324}
4325
4326uint32_t AudioPolicyManager::getStrategyForAttr(const audio_attributes_t *attr) {
4327    // flags to strategy mapping
4328    if ((attr->flags & AUDIO_FLAG_BEACON) == AUDIO_FLAG_BEACON) {
4329        return (uint32_t) STRATEGY_TRANSMITTED_THROUGH_SPEAKER;
4330    }
4331    if ((attr->flags & AUDIO_FLAG_AUDIBILITY_ENFORCED) == AUDIO_FLAG_AUDIBILITY_ENFORCED) {
4332        return (uint32_t) STRATEGY_ENFORCED_AUDIBLE;
4333    }
4334
4335    // usage to strategy mapping
4336    switch (attr->usage) {
4337    case AUDIO_USAGE_ASSISTANCE_ACCESSIBILITY:
4338        if (isStreamActive(AUDIO_STREAM_RING) || isStreamActive(AUDIO_STREAM_ALARM)) {
4339            return (uint32_t) STRATEGY_SONIFICATION;
4340        }
4341        if (isInCall()) {
4342            return (uint32_t) STRATEGY_PHONE;
4343        }
4344        return (uint32_t) STRATEGY_ACCESSIBILITY;
4345
4346    case AUDIO_USAGE_MEDIA:
4347    case AUDIO_USAGE_GAME:
4348    case AUDIO_USAGE_ASSISTANCE_NAVIGATION_GUIDANCE:
4349    case AUDIO_USAGE_ASSISTANCE_SONIFICATION:
4350        return (uint32_t) STRATEGY_MEDIA;
4351
4352    case AUDIO_USAGE_VOICE_COMMUNICATION:
4353        return (uint32_t) STRATEGY_PHONE;
4354
4355    case AUDIO_USAGE_VOICE_COMMUNICATION_SIGNALLING:
4356        return (uint32_t) STRATEGY_DTMF;
4357
4358    case AUDIO_USAGE_ALARM:
4359    case AUDIO_USAGE_NOTIFICATION_TELEPHONY_RINGTONE:
4360        return (uint32_t) STRATEGY_SONIFICATION;
4361
4362    case AUDIO_USAGE_NOTIFICATION:
4363    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_REQUEST:
4364    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_INSTANT:
4365    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_DELAYED:
4366    case AUDIO_USAGE_NOTIFICATION_EVENT:
4367        return (uint32_t) STRATEGY_SONIFICATION_RESPECTFUL;
4368
4369    case AUDIO_USAGE_UNKNOWN:
4370    default:
4371        return (uint32_t) STRATEGY_MEDIA;
4372    }
4373}
4374
4375void AudioPolicyManager::handleNotificationRoutingForStream(audio_stream_type_t stream) {
4376    switch(stream) {
4377    case AUDIO_STREAM_MUSIC:
4378        checkOutputForStrategy(STRATEGY_SONIFICATION_RESPECTFUL);
4379        updateDevicesAndOutputs();
4380        break;
4381    default:
4382        break;
4383    }
4384}
4385
4386bool AudioPolicyManager::isAnyOutputActive(audio_stream_type_t streamToIgnore) {
4387    for (size_t s = 0 ; s < AUDIO_STREAM_CNT ; s++) {
4388        if (s == (size_t) streamToIgnore) {
4389            continue;
4390        }
4391        for (size_t i = 0; i < mOutputs.size(); i++) {
4392            const sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(i);
4393            if (outputDesc->mRefCount[s] != 0) {
4394                return true;
4395            }
4396        }
4397    }
4398    return false;
4399}
4400
4401uint32_t AudioPolicyManager::handleEventForBeacon(int event) {
4402    switch(event) {
4403    case STARTING_OUTPUT:
4404        mBeaconMuteRefCount++;
4405        break;
4406    case STOPPING_OUTPUT:
4407        if (mBeaconMuteRefCount > 0) {
4408            mBeaconMuteRefCount--;
4409        }
4410        break;
4411    case STARTING_BEACON:
4412        mBeaconPlayingRefCount++;
4413        break;
4414    case STOPPING_BEACON:
4415        if (mBeaconPlayingRefCount > 0) {
4416            mBeaconPlayingRefCount--;
4417        }
4418        break;
4419    }
4420
4421    if (mBeaconMuteRefCount > 0) {
4422        // any playback causes beacon to be muted
4423        return setBeaconMute(true);
4424    } else {
4425        // no other playback: unmute when beacon starts playing, mute when it stops
4426        return setBeaconMute(mBeaconPlayingRefCount == 0);
4427    }
4428}
4429
4430uint32_t AudioPolicyManager::setBeaconMute(bool mute) {
4431    ALOGV("setBeaconMute(%d) mBeaconMuteRefCount=%d mBeaconPlayingRefCount=%d",
4432            mute, mBeaconMuteRefCount, mBeaconPlayingRefCount);
4433    // keep track of muted state to avoid repeating mute/unmute operations
4434    if (mBeaconMuted != mute) {
4435        // mute/unmute AUDIO_STREAM_TTS on all outputs
4436        ALOGV("\t muting %d", mute);
4437        uint32_t maxLatency = 0;
4438        for (size_t i = 0; i < mOutputs.size(); i++) {
4439            sp<AudioOutputDescriptor> desc = mOutputs.valueAt(i);
4440            setStreamMute(AUDIO_STREAM_TTS, mute/*on*/,
4441                    desc->mIoHandle,
4442                    0 /*delay*/, AUDIO_DEVICE_NONE);
4443            const uint32_t latency = desc->latency() * 2;
4444            if (latency > maxLatency) {
4445                maxLatency = latency;
4446            }
4447        }
4448        mBeaconMuted = mute;
4449        return maxLatency;
4450    }
4451    return 0;
4452}
4453
4454audio_devices_t AudioPolicyManager::getDeviceForStrategy(routing_strategy strategy,
4455                                                             bool fromCache)
4456{
4457    uint32_t device = AUDIO_DEVICE_NONE;
4458
4459    if (fromCache) {
4460        ALOGVV("getDeviceForStrategy() from cache strategy %d, device %x",
4461              strategy, mDeviceForStrategy[strategy]);
4462        return mDeviceForStrategy[strategy];
4463    }
4464    audio_devices_t availableOutputDeviceTypes = mAvailableOutputDevices.types();
4465    switch (strategy) {
4466
4467    case STRATEGY_TRANSMITTED_THROUGH_SPEAKER:
4468        device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPEAKER;
4469        if (!device) {
4470            ALOGE("getDeviceForStrategy() no device found for "\
4471                    "STRATEGY_TRANSMITTED_THROUGH_SPEAKER");
4472        }
4473        break;
4474
4475    case STRATEGY_SONIFICATION_RESPECTFUL:
4476        if (isInCall()) {
4477            device = getDeviceForStrategy(STRATEGY_SONIFICATION, false /*fromCache*/);
4478        } else if (isStreamActiveRemotely(AUDIO_STREAM_MUSIC,
4479                SONIFICATION_RESPECTFUL_AFTER_MUSIC_DELAY)) {
4480            // while media is playing on a remote device, use the the sonification behavior.
4481            // Note that we test this usecase before testing if media is playing because
4482            //   the isStreamActive() method only informs about the activity of a stream, not
4483            //   if it's for local playback. Note also that we use the same delay between both tests
4484            device = getDeviceForStrategy(STRATEGY_SONIFICATION, false /*fromCache*/);
4485            //user "safe" speaker if available instead of normal speaker to avoid triggering
4486            //other acoustic safety mechanisms for notification
4487            if (device == AUDIO_DEVICE_OUT_SPEAKER && (availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPEAKER_SAFE))
4488                device = AUDIO_DEVICE_OUT_SPEAKER_SAFE;
4489        } else if (isStreamActive(AUDIO_STREAM_MUSIC, SONIFICATION_RESPECTFUL_AFTER_MUSIC_DELAY)) {
4490            // while media is playing (or has recently played), use the same device
4491            device = getDeviceForStrategy(STRATEGY_MEDIA, false /*fromCache*/);
4492        } else {
4493            // when media is not playing anymore, fall back on the sonification behavior
4494            device = getDeviceForStrategy(STRATEGY_SONIFICATION, false /*fromCache*/);
4495            //user "safe" speaker if available instead of normal speaker to avoid triggering
4496            //other acoustic safety mechanisms for notification
4497            if (device == AUDIO_DEVICE_OUT_SPEAKER && (availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPEAKER_SAFE))
4498                device = AUDIO_DEVICE_OUT_SPEAKER_SAFE;
4499        }
4500
4501        break;
4502
4503    case STRATEGY_DTMF:
4504        if (!isInCall()) {
4505            // when off call, DTMF strategy follows the same rules as MEDIA strategy
4506            device = getDeviceForStrategy(STRATEGY_MEDIA, false /*fromCache*/);
4507            break;
4508        }
4509        // when in call, DTMF and PHONE strategies follow the same rules
4510        // FALL THROUGH
4511
4512    case STRATEGY_PHONE:
4513        // Force use of only devices on primary output if:
4514        // - in call AND
4515        //   - cannot route from voice call RX OR
4516        //   - audio HAL version is < 3.0 and TX device is on the primary HW module
4517        if (mPhoneState == AUDIO_MODE_IN_CALL) {
4518            audio_devices_t txDevice =
4519                    getDeviceAndMixForInputSource(AUDIO_SOURCE_VOICE_COMMUNICATION);
4520            sp<AudioOutputDescriptor> hwOutputDesc = mOutputs.valueFor(mPrimaryOutput);
4521            if (((mAvailableInputDevices.types() &
4522                    AUDIO_DEVICE_IN_TELEPHONY_RX & ~AUDIO_DEVICE_BIT_IN) == 0) ||
4523                    (((txDevice & availablePrimaryInputDevices() & ~AUDIO_DEVICE_BIT_IN) != 0) &&
4524                         (hwOutputDesc->getAudioPort()->mModule->mHalVersion <
4525                             AUDIO_DEVICE_API_VERSION_3_0))) {
4526                availableOutputDeviceTypes = availablePrimaryOutputDevices();
4527            }
4528        }
4529        // for phone strategy, we first consider the forced use and then the available devices by order
4530        // of priority
4531        switch (mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION]) {
4532        case AUDIO_POLICY_FORCE_BT_SCO:
4533            if (!isInCall() || strategy != STRATEGY_DTMF) {
4534                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_SCO_CARKIT;
4535                if (device) break;
4536            }
4537            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_SCO_HEADSET;
4538            if (device) break;
4539            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_SCO;
4540            if (device) break;
4541            // if SCO device is requested but no SCO device is available, fall back to default case
4542            // FALL THROUGH
4543
4544        default:    // FORCE_NONE
4545            // when not in a phone call, phone strategy should route STREAM_VOICE_CALL to A2DP
4546            if (!isInCall() &&
4547                    (mForceUse[AUDIO_POLICY_FORCE_FOR_MEDIA] != AUDIO_POLICY_FORCE_NO_BT_A2DP) &&
4548                    (getA2dpOutput() != 0)) {
4549                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP;
4550                if (device) break;
4551                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES;
4552                if (device) break;
4553            }
4554            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_WIRED_HEADPHONE;
4555            if (device) break;
4556            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_WIRED_HEADSET;
4557            if (device) break;
4558            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_DEVICE;
4559            if (device) break;
4560            if (mPhoneState != AUDIO_MODE_IN_CALL) {
4561                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_ACCESSORY;
4562                if (device) break;
4563                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_DGTL_DOCK_HEADSET;
4564                if (device) break;
4565                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_AUX_DIGITAL;
4566                if (device) break;
4567                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_ANLG_DOCK_HEADSET;
4568                if (device) break;
4569            }
4570            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_EARPIECE;
4571            if (device) break;
4572            device = mDefaultOutputDevice->mDeviceType;
4573            if (device == AUDIO_DEVICE_NONE) {
4574                ALOGE("getDeviceForStrategy() no device found for STRATEGY_PHONE");
4575            }
4576            break;
4577
4578        case AUDIO_POLICY_FORCE_SPEAKER:
4579            // when not in a phone call, phone strategy should route STREAM_VOICE_CALL to
4580            // A2DP speaker when forcing to speaker output
4581            if (!isInCall() &&
4582                    (mForceUse[AUDIO_POLICY_FORCE_FOR_MEDIA] != AUDIO_POLICY_FORCE_NO_BT_A2DP) &&
4583                    (getA2dpOutput() != 0)) {
4584                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_SPEAKER;
4585                if (device) break;
4586            }
4587            if (mPhoneState != AUDIO_MODE_IN_CALL) {
4588                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_ACCESSORY;
4589                if (device) break;
4590                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_DEVICE;
4591                if (device) break;
4592                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_DGTL_DOCK_HEADSET;
4593                if (device) break;
4594                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_AUX_DIGITAL;
4595                if (device) break;
4596                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_ANLG_DOCK_HEADSET;
4597                if (device) break;
4598            }
4599            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_LINE;
4600            if (device) break;
4601            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPEAKER;
4602            if (device) break;
4603            device = mDefaultOutputDevice->mDeviceType;
4604            if (device == AUDIO_DEVICE_NONE) {
4605                ALOGE("getDeviceForStrategy() no device found for STRATEGY_PHONE, FORCE_SPEAKER");
4606            }
4607            break;
4608        }
4609    break;
4610
4611    case STRATEGY_SONIFICATION:
4612
4613        // If incall, just select the STRATEGY_PHONE device: The rest of the behavior is handled by
4614        // handleIncallSonification().
4615        if (isInCall()) {
4616            device = getDeviceForStrategy(STRATEGY_PHONE, false /*fromCache*/);
4617            break;
4618        }
4619        // FALL THROUGH
4620
4621    case STRATEGY_ENFORCED_AUDIBLE:
4622        // strategy STRATEGY_ENFORCED_AUDIBLE uses same routing policy as STRATEGY_SONIFICATION
4623        // except:
4624        //   - when in call where it doesn't default to STRATEGY_PHONE behavior
4625        //   - in countries where not enforced in which case it follows STRATEGY_MEDIA
4626
4627        if ((strategy == STRATEGY_SONIFICATION) ||
4628                (mForceUse[AUDIO_POLICY_FORCE_FOR_SYSTEM] == AUDIO_POLICY_FORCE_SYSTEM_ENFORCED)) {
4629            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPEAKER;
4630            if (device == AUDIO_DEVICE_NONE) {
4631                ALOGE("getDeviceForStrategy() speaker device not found for STRATEGY_SONIFICATION");
4632            }
4633        }
4634        // The second device used for sonification is the same as the device used by media strategy
4635        // FALL THROUGH
4636
4637    // FIXME: STRATEGY_ACCESSIBILITY and STRATEGY_REROUTING follow STRATEGY_MEDIA for now
4638    case STRATEGY_ACCESSIBILITY:
4639        if (strategy == STRATEGY_ACCESSIBILITY) {
4640            // do not route accessibility prompts to a digital output currently configured with a
4641            // compressed format as they would likely not be mixed and dropped.
4642            for (size_t i = 0; i < mOutputs.size(); i++) {
4643                sp<AudioOutputDescriptor> desc = mOutputs.valueAt(i);
4644                audio_devices_t devices = desc->device() &
4645                    (AUDIO_DEVICE_OUT_HDMI | AUDIO_DEVICE_OUT_SPDIF | AUDIO_DEVICE_OUT_HDMI_ARC);
4646                if (desc->isActive() && !audio_is_linear_pcm(desc->mFormat) &&
4647                        devices != AUDIO_DEVICE_NONE) {
4648                    availableOutputDeviceTypes = availableOutputDeviceTypes & ~devices;
4649                }
4650            }
4651        }
4652        // FALL THROUGH
4653
4654    case STRATEGY_REROUTING:
4655    case STRATEGY_MEDIA: {
4656        uint32_t device2 = AUDIO_DEVICE_NONE;
4657        if (strategy != STRATEGY_SONIFICATION) {
4658            // no sonification on remote submix (e.g. WFD)
4659            if (mAvailableOutputDevices.getDevice(AUDIO_DEVICE_OUT_REMOTE_SUBMIX, String8("0")) != 0) {
4660                device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_REMOTE_SUBMIX;
4661            }
4662        }
4663        if ((device2 == AUDIO_DEVICE_NONE) &&
4664                (mForceUse[AUDIO_POLICY_FORCE_FOR_MEDIA] != AUDIO_POLICY_FORCE_NO_BT_A2DP) &&
4665                (getA2dpOutput() != 0)) {
4666            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP;
4667            if (device2 == AUDIO_DEVICE_NONE) {
4668                device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES;
4669            }
4670            if (device2 == AUDIO_DEVICE_NONE) {
4671                device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_SPEAKER;
4672            }
4673        }
4674        if ((device2 == AUDIO_DEVICE_NONE) &&
4675            (mForceUse[AUDIO_POLICY_FORCE_FOR_MEDIA] == AUDIO_POLICY_FORCE_SPEAKER)) {
4676            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPEAKER;
4677        }
4678        if (device2 == AUDIO_DEVICE_NONE) {
4679            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_WIRED_HEADPHONE;
4680        }
4681        if ((device2 == AUDIO_DEVICE_NONE)) {
4682            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_LINE;
4683        }
4684        if (device2 == AUDIO_DEVICE_NONE) {
4685            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_WIRED_HEADSET;
4686        }
4687        if (device2 == AUDIO_DEVICE_NONE) {
4688            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_ACCESSORY;
4689        }
4690        if (device2 == AUDIO_DEVICE_NONE) {
4691            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_DEVICE;
4692        }
4693        if (device2 == AUDIO_DEVICE_NONE) {
4694            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_DGTL_DOCK_HEADSET;
4695        }
4696        if ((device2 == AUDIO_DEVICE_NONE) && (strategy != STRATEGY_SONIFICATION)) {
4697            // no sonification on aux digital (e.g. HDMI)
4698            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_AUX_DIGITAL;
4699        }
4700        if ((device2 == AUDIO_DEVICE_NONE) &&
4701                (mForceUse[AUDIO_POLICY_FORCE_FOR_DOCK] == AUDIO_POLICY_FORCE_ANALOG_DOCK)) {
4702            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_ANLG_DOCK_HEADSET;
4703        }
4704        if (device2 == AUDIO_DEVICE_NONE) {
4705            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPEAKER;
4706        }
4707        int device3 = AUDIO_DEVICE_NONE;
4708        if (strategy == STRATEGY_MEDIA) {
4709            // ARC, SPDIF and AUX_LINE can co-exist with others.
4710            device3 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_HDMI_ARC;
4711            device3 |= (availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPDIF);
4712            device3 |= (availableOutputDeviceTypes & AUDIO_DEVICE_OUT_AUX_LINE);
4713        }
4714
4715        device2 |= device3;
4716        // device is DEVICE_OUT_SPEAKER if we come from case STRATEGY_SONIFICATION or
4717        // STRATEGY_ENFORCED_AUDIBLE, AUDIO_DEVICE_NONE otherwise
4718        device |= device2;
4719
4720        // If hdmi system audio mode is on, remove speaker out of output list.
4721        if ((strategy == STRATEGY_MEDIA) &&
4722            (mForceUse[AUDIO_POLICY_FORCE_FOR_HDMI_SYSTEM_AUDIO] ==
4723                AUDIO_POLICY_FORCE_HDMI_SYSTEM_AUDIO_ENFORCED)) {
4724            device &= ~AUDIO_DEVICE_OUT_SPEAKER;
4725        }
4726
4727        if (device) break;
4728        device = mDefaultOutputDevice->mDeviceType;
4729        if (device == AUDIO_DEVICE_NONE) {
4730            ALOGE("getDeviceForStrategy() no device found for STRATEGY_MEDIA");
4731        }
4732        } break;
4733
4734    default:
4735        ALOGW("getDeviceForStrategy() unknown strategy: %d", strategy);
4736        break;
4737    }
4738
4739    ALOGVV("getDeviceForStrategy() strategy %d, device %x", strategy, device);
4740    return device;
4741}
4742
4743void AudioPolicyManager::updateDevicesAndOutputs()
4744{
4745    for (int i = 0; i < NUM_STRATEGIES; i++) {
4746        mDeviceForStrategy[i] = getDeviceForStrategy((routing_strategy)i, false /*fromCache*/);
4747    }
4748    mPreviousOutputs = mOutputs;
4749}
4750
4751uint32_t AudioPolicyManager::checkDeviceMuteStrategies(sp<AudioOutputDescriptor> outputDesc,
4752                                                       audio_devices_t prevDevice,
4753                                                       uint32_t delayMs)
4754{
4755    // mute/unmute strategies using an incompatible device combination
4756    // if muting, wait for the audio in pcm buffer to be drained before proceeding
4757    // if unmuting, unmute only after the specified delay
4758    if (outputDesc->isDuplicated()) {
4759        return 0;
4760    }
4761
4762    uint32_t muteWaitMs = 0;
4763    audio_devices_t device = outputDesc->device();
4764    bool shouldMute = outputDesc->isActive() && (popcount(device) >= 2);
4765
4766    for (size_t i = 0; i < NUM_STRATEGIES; i++) {
4767        audio_devices_t curDevice = getDeviceForStrategy((routing_strategy)i, false /*fromCache*/);
4768        curDevice = curDevice & outputDesc->mProfile->mSupportedDevices.types();
4769        bool mute = shouldMute && (curDevice & device) && (curDevice != device);
4770        bool doMute = false;
4771
4772        if (mute && !outputDesc->mStrategyMutedByDevice[i]) {
4773            doMute = true;
4774            outputDesc->mStrategyMutedByDevice[i] = true;
4775        } else if (!mute && outputDesc->mStrategyMutedByDevice[i]){
4776            doMute = true;
4777            outputDesc->mStrategyMutedByDevice[i] = false;
4778        }
4779        if (doMute) {
4780            for (size_t j = 0; j < mOutputs.size(); j++) {
4781                sp<AudioOutputDescriptor> desc = mOutputs.valueAt(j);
4782                // skip output if it does not share any device with current output
4783                if ((desc->supportedDevices() & outputDesc->supportedDevices())
4784                        == AUDIO_DEVICE_NONE) {
4785                    continue;
4786                }
4787                audio_io_handle_t curOutput = mOutputs.keyAt(j);
4788                ALOGVV("checkDeviceMuteStrategies() %s strategy %d (curDevice %04x) on output %d",
4789                      mute ? "muting" : "unmuting", i, curDevice, curOutput);
4790                setStrategyMute((routing_strategy)i, mute, curOutput, mute ? 0 : delayMs);
4791                if (desc->isStrategyActive((routing_strategy)i)) {
4792                    if (mute) {
4793                        // FIXME: should not need to double latency if volume could be applied
4794                        // immediately by the audioflinger mixer. We must account for the delay
4795                        // between now and the next time the audioflinger thread for this output
4796                        // will process a buffer (which corresponds to one buffer size,
4797                        // usually 1/2 or 1/4 of the latency).
4798                        if (muteWaitMs < desc->latency() * 2) {
4799                            muteWaitMs = desc->latency() * 2;
4800                        }
4801                    }
4802                }
4803            }
4804        }
4805    }
4806
4807    // temporary mute output if device selection changes to avoid volume bursts due to
4808    // different per device volumes
4809    if (outputDesc->isActive() && (device != prevDevice)) {
4810        if (muteWaitMs < outputDesc->latency() * 2) {
4811            muteWaitMs = outputDesc->latency() * 2;
4812        }
4813        for (size_t i = 0; i < NUM_STRATEGIES; i++) {
4814            if (outputDesc->isStrategyActive((routing_strategy)i)) {
4815                setStrategyMute((routing_strategy)i, true, outputDesc->mIoHandle);
4816                // do tempMute unmute after twice the mute wait time
4817                setStrategyMute((routing_strategy)i, false, outputDesc->mIoHandle,
4818                                muteWaitMs *2, device);
4819            }
4820        }
4821    }
4822
4823    // wait for the PCM output buffers to empty before proceeding with the rest of the command
4824    if (muteWaitMs > delayMs) {
4825        muteWaitMs -= delayMs;
4826        usleep(muteWaitMs * 1000);
4827        return muteWaitMs;
4828    }
4829    return 0;
4830}
4831
4832uint32_t AudioPolicyManager::setOutputDevice(audio_io_handle_t output,
4833                                             audio_devices_t device,
4834                                             bool force,
4835                                             int delayMs,
4836                                             audio_patch_handle_t *patchHandle,
4837                                             const char* address)
4838{
4839    ALOGV("setOutputDevice() output %d device %04x delayMs %d", output, device, delayMs);
4840    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
4841    AudioParameter param;
4842    uint32_t muteWaitMs;
4843
4844    if (outputDesc->isDuplicated()) {
4845        muteWaitMs = setOutputDevice(outputDesc->mOutput1->mIoHandle, device, force, delayMs);
4846        muteWaitMs += setOutputDevice(outputDesc->mOutput2->mIoHandle, device, force, delayMs);
4847        return muteWaitMs;
4848    }
4849    // no need to proceed if new device is not AUDIO_DEVICE_NONE and not supported by current
4850    // output profile
4851    if ((device != AUDIO_DEVICE_NONE) &&
4852            ((device & outputDesc->mProfile->mSupportedDevices.types()) == 0)) {
4853        return 0;
4854    }
4855
4856    // filter devices according to output selected
4857    device = (audio_devices_t)(device & outputDesc->mProfile->mSupportedDevices.types());
4858
4859    audio_devices_t prevDevice = outputDesc->mDevice;
4860
4861    ALOGV("setOutputDevice() prevDevice %04x", prevDevice);
4862
4863    if (device != AUDIO_DEVICE_NONE) {
4864        outputDesc->mDevice = device;
4865    }
4866    muteWaitMs = checkDeviceMuteStrategies(outputDesc, prevDevice, delayMs);
4867
4868    // Do not change the routing if:
4869    //      the requested device is AUDIO_DEVICE_NONE
4870    //      OR the requested device is the same as current device
4871    //  AND force is not specified
4872    //  AND the output is connected by a valid audio patch.
4873    // Doing this check here allows the caller to call setOutputDevice() without conditions
4874    if ((device == AUDIO_DEVICE_NONE || device == prevDevice) && !force &&
4875            outputDesc->mPatchHandle != 0) {
4876        ALOGV("setOutputDevice() setting same device %04x or null device for output %d",
4877              device, output);
4878        return muteWaitMs;
4879    }
4880
4881    ALOGV("setOutputDevice() changing device");
4882
4883    // do the routing
4884    if (device == AUDIO_DEVICE_NONE) {
4885        resetOutputDevice(output, delayMs, NULL);
4886    } else {
4887        DeviceVector deviceList = (address == NULL) ?
4888                mAvailableOutputDevices.getDevicesFromType(device)
4889                : mAvailableOutputDevices.getDevicesFromTypeAddr(device, String8(address));
4890        if (!deviceList.isEmpty()) {
4891            struct audio_patch patch;
4892            outputDesc->toAudioPortConfig(&patch.sources[0]);
4893            patch.num_sources = 1;
4894            patch.num_sinks = 0;
4895            for (size_t i = 0; i < deviceList.size() && i < AUDIO_PATCH_PORTS_MAX; i++) {
4896                deviceList.itemAt(i)->toAudioPortConfig(&patch.sinks[i]);
4897                patch.num_sinks++;
4898            }
4899            ssize_t index;
4900            if (patchHandle && *patchHandle != AUDIO_PATCH_HANDLE_NONE) {
4901                index = mAudioPatches.indexOfKey(*patchHandle);
4902            } else {
4903                index = mAudioPatches.indexOfKey(outputDesc->mPatchHandle);
4904            }
4905            sp< AudioPatch> patchDesc;
4906            audio_patch_handle_t afPatchHandle = AUDIO_PATCH_HANDLE_NONE;
4907            if (index >= 0) {
4908                patchDesc = mAudioPatches.valueAt(index);
4909                afPatchHandle = patchDesc->mAfPatchHandle;
4910            }
4911
4912            status_t status = mpClientInterface->createAudioPatch(&patch,
4913                                                                   &afPatchHandle,
4914                                                                   delayMs);
4915            ALOGV("setOutputDevice() createAudioPatch returned %d patchHandle %d"
4916                    "num_sources %d num_sinks %d",
4917                                       status, afPatchHandle, patch.num_sources, patch.num_sinks);
4918            if (status == NO_ERROR) {
4919                if (index < 0) {
4920                    patchDesc = new AudioPatch((audio_patch_handle_t)nextUniqueId(),
4921                                               &patch, mUidCached);
4922                    addAudioPatch(patchDesc->mHandle, patchDesc);
4923                } else {
4924                    patchDesc->mPatch = patch;
4925                }
4926                patchDesc->mAfPatchHandle = afPatchHandle;
4927                patchDesc->mUid = mUidCached;
4928                if (patchHandle) {
4929                    *patchHandle = patchDesc->mHandle;
4930                }
4931                outputDesc->mPatchHandle = patchDesc->mHandle;
4932                nextAudioPortGeneration();
4933                mpClientInterface->onAudioPatchListUpdate();
4934            }
4935        }
4936
4937        // inform all input as well
4938        for (size_t i = 0; i < mInputs.size(); i++) {
4939            const sp<AudioInputDescriptor>  inputDescriptor = mInputs.valueAt(i);
4940            if (!isVirtualInputDevice(inputDescriptor->mDevice)) {
4941                AudioParameter inputCmd = AudioParameter();
4942                ALOGV("%s: inform input %d of device:%d", __func__,
4943                      inputDescriptor->mIoHandle, device);
4944                inputCmd.addInt(String8(AudioParameter::keyRouting),device);
4945                mpClientInterface->setParameters(inputDescriptor->mIoHandle,
4946                                                 inputCmd.toString(),
4947                                                 delayMs);
4948            }
4949        }
4950    }
4951
4952    // update stream volumes according to new device
4953    applyStreamVolumes(output, device, delayMs);
4954
4955    return muteWaitMs;
4956}
4957
4958status_t AudioPolicyManager::resetOutputDevice(audio_io_handle_t output,
4959                                               int delayMs,
4960                                               audio_patch_handle_t *patchHandle)
4961{
4962    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
4963    ssize_t index;
4964    if (patchHandle) {
4965        index = mAudioPatches.indexOfKey(*patchHandle);
4966    } else {
4967        index = mAudioPatches.indexOfKey(outputDesc->mPatchHandle);
4968    }
4969    if (index < 0) {
4970        return INVALID_OPERATION;
4971    }
4972    sp< AudioPatch> patchDesc = mAudioPatches.valueAt(index);
4973    status_t status = mpClientInterface->releaseAudioPatch(patchDesc->mAfPatchHandle, delayMs);
4974    ALOGV("resetOutputDevice() releaseAudioPatch returned %d", status);
4975    outputDesc->mPatchHandle = 0;
4976    removeAudioPatch(patchDesc->mHandle);
4977    nextAudioPortGeneration();
4978    mpClientInterface->onAudioPatchListUpdate();
4979    return status;
4980}
4981
4982status_t AudioPolicyManager::setInputDevice(audio_io_handle_t input,
4983                                            audio_devices_t device,
4984                                            bool force,
4985                                            audio_patch_handle_t *patchHandle)
4986{
4987    status_t status = NO_ERROR;
4988
4989    sp<AudioInputDescriptor> inputDesc = mInputs.valueFor(input);
4990    if ((device != AUDIO_DEVICE_NONE) && ((device != inputDesc->mDevice) || force)) {
4991        inputDesc->mDevice = device;
4992
4993        DeviceVector deviceList = mAvailableInputDevices.getDevicesFromType(device);
4994        if (!deviceList.isEmpty()) {
4995            struct audio_patch patch;
4996            inputDesc->toAudioPortConfig(&patch.sinks[0]);
4997            // AUDIO_SOURCE_HOTWORD is for internal use only:
4998            // handled as AUDIO_SOURCE_VOICE_RECOGNITION by the audio HAL
4999            if (patch.sinks[0].ext.mix.usecase.source == AUDIO_SOURCE_HOTWORD &&
5000                    !inputDesc->mIsSoundTrigger) {
5001                patch.sinks[0].ext.mix.usecase.source = AUDIO_SOURCE_VOICE_RECOGNITION;
5002            }
5003            patch.num_sinks = 1;
5004            //only one input device for now
5005            deviceList.itemAt(0)->toAudioPortConfig(&patch.sources[0]);
5006            patch.num_sources = 1;
5007            ssize_t index;
5008            if (patchHandle && *patchHandle != AUDIO_PATCH_HANDLE_NONE) {
5009                index = mAudioPatches.indexOfKey(*patchHandle);
5010            } else {
5011                index = mAudioPatches.indexOfKey(inputDesc->mPatchHandle);
5012            }
5013            sp< AudioPatch> patchDesc;
5014            audio_patch_handle_t afPatchHandle = AUDIO_PATCH_HANDLE_NONE;
5015            if (index >= 0) {
5016                patchDesc = mAudioPatches.valueAt(index);
5017                afPatchHandle = patchDesc->mAfPatchHandle;
5018            }
5019
5020            status_t status = mpClientInterface->createAudioPatch(&patch,
5021                                                                  &afPatchHandle,
5022                                                                  0);
5023            ALOGV("setInputDevice() createAudioPatch returned %d patchHandle %d",
5024                                                                          status, afPatchHandle);
5025            if (status == NO_ERROR) {
5026                if (index < 0) {
5027                    patchDesc = new AudioPatch((audio_patch_handle_t)nextUniqueId(),
5028                                               &patch, mUidCached);
5029                    addAudioPatch(patchDesc->mHandle, patchDesc);
5030                } else {
5031                    patchDesc->mPatch = patch;
5032                }
5033                patchDesc->mAfPatchHandle = afPatchHandle;
5034                patchDesc->mUid = mUidCached;
5035                if (patchHandle) {
5036                    *patchHandle = patchDesc->mHandle;
5037                }
5038                inputDesc->mPatchHandle = patchDesc->mHandle;
5039                nextAudioPortGeneration();
5040                mpClientInterface->onAudioPatchListUpdate();
5041            }
5042        }
5043    }
5044    return status;
5045}
5046
5047status_t AudioPolicyManager::resetInputDevice(audio_io_handle_t input,
5048                                              audio_patch_handle_t *patchHandle)
5049{
5050    sp<AudioInputDescriptor> inputDesc = mInputs.valueFor(input);
5051    ssize_t index;
5052    if (patchHandle) {
5053        index = mAudioPatches.indexOfKey(*patchHandle);
5054    } else {
5055        index = mAudioPatches.indexOfKey(inputDesc->mPatchHandle);
5056    }
5057    if (index < 0) {
5058        return INVALID_OPERATION;
5059    }
5060    sp< AudioPatch> patchDesc = mAudioPatches.valueAt(index);
5061    status_t status = mpClientInterface->releaseAudioPatch(patchDesc->mAfPatchHandle, 0);
5062    ALOGV("resetInputDevice() releaseAudioPatch returned %d", status);
5063    inputDesc->mPatchHandle = 0;
5064    removeAudioPatch(patchDesc->mHandle);
5065    nextAudioPortGeneration();
5066    mpClientInterface->onAudioPatchListUpdate();
5067    return status;
5068}
5069
5070sp<AudioPolicyManager::IOProfile> AudioPolicyManager::getInputProfile(audio_devices_t device,
5071                                                   String8 address,
5072                                                   uint32_t& samplingRate,
5073                                                   audio_format_t format,
5074                                                   audio_channel_mask_t channelMask,
5075                                                   audio_input_flags_t flags)
5076{
5077    // Choose an input profile based on the requested capture parameters: select the first available
5078    // profile supporting all requested parameters.
5079
5080    for (size_t i = 0; i < mHwModules.size(); i++)
5081    {
5082        if (mHwModules[i]->mHandle == 0) {
5083            continue;
5084        }
5085        for (size_t j = 0; j < mHwModules[i]->mInputProfiles.size(); j++)
5086        {
5087            sp<IOProfile> profile = mHwModules[i]->mInputProfiles[j];
5088            // profile->log();
5089            if (profile->isCompatibleProfile(device, address, samplingRate,
5090                                             &samplingRate /*updatedSamplingRate*/,
5091                                             format, channelMask, (audio_output_flags_t) flags)) {
5092
5093                return profile;
5094            }
5095        }
5096    }
5097    return NULL;
5098}
5099
5100
5101audio_devices_t AudioPolicyManager::getDeviceAndMixForInputSource(audio_source_t inputSource,
5102                                                            AudioMix **policyMix)
5103{
5104    audio_devices_t availableDeviceTypes = mAvailableInputDevices.types() &
5105                                            ~AUDIO_DEVICE_BIT_IN;
5106
5107    for (size_t i = 0; i < mPolicyMixes.size(); i++) {
5108        if (mPolicyMixes[i]->mMix.mMixType != MIX_TYPE_RECORDERS) {
5109            continue;
5110        }
5111        for (size_t j = 0; j < mPolicyMixes[i]->mMix.mCriteria.size(); j++) {
5112            if ((RULE_MATCH_ATTRIBUTE_CAPTURE_PRESET == mPolicyMixes[i]->mMix.mCriteria[j].mRule &&
5113                    mPolicyMixes[i]->mMix.mCriteria[j].mAttr.mSource == inputSource) ||
5114               (RULE_EXCLUDE_ATTRIBUTE_CAPTURE_PRESET == mPolicyMixes[i]->mMix.mCriteria[j].mRule &&
5115                    mPolicyMixes[i]->mMix.mCriteria[j].mAttr.mSource != inputSource)) {
5116                if (availableDeviceTypes & AUDIO_DEVICE_IN_REMOTE_SUBMIX) {
5117                    if (policyMix != NULL) {
5118                        *policyMix = &mPolicyMixes[i]->mMix;
5119                    }
5120                    return AUDIO_DEVICE_IN_REMOTE_SUBMIX;
5121                }
5122                break;
5123            }
5124        }
5125    }
5126
5127    return getDeviceForInputSource(inputSource);
5128}
5129
5130audio_devices_t AudioPolicyManager::getDeviceForInputSource(audio_source_t inputSource)
5131{
5132    uint32_t device = AUDIO_DEVICE_NONE;
5133    audio_devices_t availableDeviceTypes = mAvailableInputDevices.types() &
5134                                            ~AUDIO_DEVICE_BIT_IN;
5135
5136    switch (inputSource) {
5137    case AUDIO_SOURCE_VOICE_UPLINK:
5138      if (availableDeviceTypes & AUDIO_DEVICE_IN_VOICE_CALL) {
5139          device = AUDIO_DEVICE_IN_VOICE_CALL;
5140          break;
5141      }
5142      break;
5143
5144    case AUDIO_SOURCE_DEFAULT:
5145    case AUDIO_SOURCE_MIC:
5146    if (availableDeviceTypes & AUDIO_DEVICE_IN_BLUETOOTH_A2DP) {
5147        device = AUDIO_DEVICE_IN_BLUETOOTH_A2DP;
5148    } else if (availableDeviceTypes & AUDIO_DEVICE_IN_WIRED_HEADSET) {
5149        device = AUDIO_DEVICE_IN_WIRED_HEADSET;
5150    } else if (availableDeviceTypes & AUDIO_DEVICE_IN_USB_DEVICE) {
5151        device = AUDIO_DEVICE_IN_USB_DEVICE;
5152    } else if (availableDeviceTypes & AUDIO_DEVICE_IN_BUILTIN_MIC) {
5153        device = AUDIO_DEVICE_IN_BUILTIN_MIC;
5154    }
5155    break;
5156
5157    case AUDIO_SOURCE_VOICE_COMMUNICATION:
5158        // Allow only use of devices on primary input if in call and HAL does not support routing
5159        // to voice call path.
5160        if ((mPhoneState == AUDIO_MODE_IN_CALL) &&
5161                (mAvailableOutputDevices.types() & AUDIO_DEVICE_OUT_TELEPHONY_TX) == 0) {
5162            availableDeviceTypes = availablePrimaryInputDevices() & ~AUDIO_DEVICE_BIT_IN;
5163        }
5164
5165        switch (mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION]) {
5166        case AUDIO_POLICY_FORCE_BT_SCO:
5167            // if SCO device is requested but no SCO device is available, fall back to default case
5168            if (availableDeviceTypes & AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET) {
5169                device = AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET;
5170                break;
5171            }
5172            // FALL THROUGH
5173
5174        default:    // FORCE_NONE
5175            if (availableDeviceTypes & AUDIO_DEVICE_IN_WIRED_HEADSET) {
5176                device = AUDIO_DEVICE_IN_WIRED_HEADSET;
5177            } else if (availableDeviceTypes & AUDIO_DEVICE_IN_USB_DEVICE) {
5178                device = AUDIO_DEVICE_IN_USB_DEVICE;
5179            } else if (availableDeviceTypes & AUDIO_DEVICE_IN_BUILTIN_MIC) {
5180                device = AUDIO_DEVICE_IN_BUILTIN_MIC;
5181            }
5182            break;
5183
5184        case AUDIO_POLICY_FORCE_SPEAKER:
5185            if (availableDeviceTypes & AUDIO_DEVICE_IN_BACK_MIC) {
5186                device = AUDIO_DEVICE_IN_BACK_MIC;
5187            } else if (availableDeviceTypes & AUDIO_DEVICE_IN_BUILTIN_MIC) {
5188                device = AUDIO_DEVICE_IN_BUILTIN_MIC;
5189            }
5190            break;
5191        }
5192        break;
5193
5194    case AUDIO_SOURCE_VOICE_RECOGNITION:
5195    case AUDIO_SOURCE_HOTWORD:
5196        if (mForceUse[AUDIO_POLICY_FORCE_FOR_RECORD] == AUDIO_POLICY_FORCE_BT_SCO &&
5197                availableDeviceTypes & AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET) {
5198            device = AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET;
5199        } else if (availableDeviceTypes & AUDIO_DEVICE_IN_WIRED_HEADSET) {
5200            device = AUDIO_DEVICE_IN_WIRED_HEADSET;
5201        } else if (availableDeviceTypes & AUDIO_DEVICE_IN_USB_DEVICE) {
5202            device = AUDIO_DEVICE_IN_USB_DEVICE;
5203        } else if (availableDeviceTypes & AUDIO_DEVICE_IN_BUILTIN_MIC) {
5204            device = AUDIO_DEVICE_IN_BUILTIN_MIC;
5205        }
5206        break;
5207    case AUDIO_SOURCE_CAMCORDER:
5208        if (availableDeviceTypes & AUDIO_DEVICE_IN_BACK_MIC) {
5209            device = AUDIO_DEVICE_IN_BACK_MIC;
5210        } else if (availableDeviceTypes & AUDIO_DEVICE_IN_BUILTIN_MIC) {
5211            device = AUDIO_DEVICE_IN_BUILTIN_MIC;
5212        }
5213        break;
5214    case AUDIO_SOURCE_VOICE_DOWNLINK:
5215    case AUDIO_SOURCE_VOICE_CALL:
5216        if (availableDeviceTypes & AUDIO_DEVICE_IN_VOICE_CALL) {
5217            device = AUDIO_DEVICE_IN_VOICE_CALL;
5218        }
5219        break;
5220    case AUDIO_SOURCE_REMOTE_SUBMIX:
5221        if (availableDeviceTypes & AUDIO_DEVICE_IN_REMOTE_SUBMIX) {
5222            device = AUDIO_DEVICE_IN_REMOTE_SUBMIX;
5223        }
5224        break;
5225     case AUDIO_SOURCE_FM_TUNER:
5226        if (availableDeviceTypes & AUDIO_DEVICE_IN_FM_TUNER) {
5227            device = AUDIO_DEVICE_IN_FM_TUNER;
5228        }
5229        break;
5230    default:
5231        ALOGW("getDeviceForInputSource() invalid input source %d", inputSource);
5232        break;
5233    }
5234    ALOGV("getDeviceForInputSource()input source %d, device %08x", inputSource, device);
5235    return device;
5236}
5237
5238bool AudioPolicyManager::isVirtualInputDevice(audio_devices_t device)
5239{
5240    if ((device & AUDIO_DEVICE_BIT_IN) != 0) {
5241        device &= ~AUDIO_DEVICE_BIT_IN;
5242        if ((popcount(device) == 1) && ((device & ~APM_AUDIO_IN_DEVICE_VIRTUAL_ALL) == 0))
5243            return true;
5244    }
5245    return false;
5246}
5247
5248bool AudioPolicyManager::deviceDistinguishesOnAddress(audio_devices_t device) {
5249    return ((device & APM_AUDIO_DEVICE_MATCH_ADDRESS_ALL & ~AUDIO_DEVICE_BIT_IN) != 0);
5250}
5251
5252audio_io_handle_t AudioPolicyManager::getActiveInput(bool ignoreVirtualInputs)
5253{
5254    for (size_t i = 0; i < mInputs.size(); i++) {
5255        const sp<AudioInputDescriptor>  input_descriptor = mInputs.valueAt(i);
5256        if ((input_descriptor->mRefCount > 0)
5257                && (!ignoreVirtualInputs || !isVirtualInputDevice(input_descriptor->mDevice))) {
5258            return mInputs.keyAt(i);
5259        }
5260    }
5261    return 0;
5262}
5263
5264uint32_t AudioPolicyManager::activeInputsCount() const
5265{
5266    uint32_t count = 0;
5267    for (size_t i = 0; i < mInputs.size(); i++) {
5268        const sp<AudioInputDescriptor>  desc = mInputs.valueAt(i);
5269        if (desc->mRefCount > 0) {
5270            return count++;
5271        }
5272    }
5273    return count;
5274}
5275
5276
5277audio_devices_t AudioPolicyManager::getDeviceForVolume(audio_devices_t device)
5278{
5279    if (device == AUDIO_DEVICE_NONE) {
5280        // this happens when forcing a route update and no track is active on an output.
5281        // In this case the returned category is not important.
5282        device =  AUDIO_DEVICE_OUT_SPEAKER;
5283    } else if (popcount(device) > 1) {
5284        // Multiple device selection is either:
5285        //  - speaker + one other device: give priority to speaker in this case.
5286        //  - one A2DP device + another device: happens with duplicated output. In this case
5287        // retain the device on the A2DP output as the other must not correspond to an active
5288        // selection if not the speaker.
5289        //  - HDMI-CEC system audio mode only output: give priority to available item in order.
5290        if (device & AUDIO_DEVICE_OUT_SPEAKER) {
5291            device = AUDIO_DEVICE_OUT_SPEAKER;
5292        } else if (device & AUDIO_DEVICE_OUT_HDMI_ARC) {
5293            device = AUDIO_DEVICE_OUT_HDMI_ARC;
5294        } else if (device & AUDIO_DEVICE_OUT_AUX_LINE) {
5295            device = AUDIO_DEVICE_OUT_AUX_LINE;
5296        } else if (device & AUDIO_DEVICE_OUT_SPDIF) {
5297            device = AUDIO_DEVICE_OUT_SPDIF;
5298        } else {
5299            device = (audio_devices_t)(device & AUDIO_DEVICE_OUT_ALL_A2DP);
5300        }
5301    }
5302
5303    /*SPEAKER_SAFE is an alias of SPEAKER for purposes of volume control*/
5304    if (device == AUDIO_DEVICE_OUT_SPEAKER_SAFE)
5305        device = AUDIO_DEVICE_OUT_SPEAKER;
5306
5307    ALOGW_IF(popcount(device) != 1,
5308            "getDeviceForVolume() invalid device combination: %08x",
5309            device);
5310
5311    return device;
5312}
5313
5314AudioPolicyManager::device_category AudioPolicyManager::getDeviceCategory(audio_devices_t device)
5315{
5316    switch(getDeviceForVolume(device)) {
5317        case AUDIO_DEVICE_OUT_EARPIECE:
5318            return DEVICE_CATEGORY_EARPIECE;
5319        case AUDIO_DEVICE_OUT_WIRED_HEADSET:
5320        case AUDIO_DEVICE_OUT_WIRED_HEADPHONE:
5321        case AUDIO_DEVICE_OUT_BLUETOOTH_SCO:
5322        case AUDIO_DEVICE_OUT_BLUETOOTH_SCO_HEADSET:
5323        case AUDIO_DEVICE_OUT_BLUETOOTH_A2DP:
5324        case AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES:
5325            return DEVICE_CATEGORY_HEADSET;
5326        case AUDIO_DEVICE_OUT_LINE:
5327        case AUDIO_DEVICE_OUT_AUX_DIGITAL:
5328        /*USB?  Remote submix?*/
5329            return DEVICE_CATEGORY_EXT_MEDIA;
5330        case AUDIO_DEVICE_OUT_SPEAKER:
5331        case AUDIO_DEVICE_OUT_BLUETOOTH_SCO_CARKIT:
5332        case AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_SPEAKER:
5333        case AUDIO_DEVICE_OUT_USB_ACCESSORY:
5334        case AUDIO_DEVICE_OUT_USB_DEVICE:
5335        case AUDIO_DEVICE_OUT_REMOTE_SUBMIX:
5336        default:
5337            return DEVICE_CATEGORY_SPEAKER;
5338    }
5339}
5340
5341/* static */
5342float AudioPolicyManager::volIndexToAmpl(audio_devices_t device, const StreamDescriptor& streamDesc,
5343        int indexInUi)
5344{
5345    device_category deviceCategory = getDeviceCategory(device);
5346    const VolumeCurvePoint *curve = streamDesc.mVolumeCurve[deviceCategory];
5347
5348    // the volume index in the UI is relative to the min and max volume indices for this stream type
5349    int nbSteps = 1 + curve[VOLMAX].mIndex -
5350            curve[VOLMIN].mIndex;
5351    int volIdx = (nbSteps * (indexInUi - streamDesc.mIndexMin)) /
5352            (streamDesc.mIndexMax - streamDesc.mIndexMin);
5353
5354    // find what part of the curve this index volume belongs to, or if it's out of bounds
5355    int segment = 0;
5356    if (volIdx < curve[VOLMIN].mIndex) {         // out of bounds
5357        return 0.0f;
5358    } else if (volIdx < curve[VOLKNEE1].mIndex) {
5359        segment = 0;
5360    } else if (volIdx < curve[VOLKNEE2].mIndex) {
5361        segment = 1;
5362    } else if (volIdx <= curve[VOLMAX].mIndex) {
5363        segment = 2;
5364    } else {                                                               // out of bounds
5365        return 1.0f;
5366    }
5367
5368    // linear interpolation in the attenuation table in dB
5369    float decibels = curve[segment].mDBAttenuation +
5370            ((float)(volIdx - curve[segment].mIndex)) *
5371                ( (curve[segment+1].mDBAttenuation -
5372                        curve[segment].mDBAttenuation) /
5373                    ((float)(curve[segment+1].mIndex -
5374                            curve[segment].mIndex)) );
5375
5376    float amplification = exp( decibels * 0.115129f); // exp( dB * ln(10) / 20 )
5377
5378    ALOGVV("VOLUME vol index=[%d %d %d], dB=[%.1f %.1f %.1f] ampl=%.5f",
5379            curve[segment].mIndex, volIdx,
5380            curve[segment+1].mIndex,
5381            curve[segment].mDBAttenuation,
5382            decibels,
5383            curve[segment+1].mDBAttenuation,
5384            amplification);
5385
5386    return amplification;
5387}
5388
5389const AudioPolicyManager::VolumeCurvePoint
5390    AudioPolicyManager::sDefaultVolumeCurve[AudioPolicyManager::VOLCNT] = {
5391    {1, -49.5f}, {33, -33.5f}, {66, -17.0f}, {100, 0.0f}
5392};
5393
5394const AudioPolicyManager::VolumeCurvePoint
5395    AudioPolicyManager::sDefaultMediaVolumeCurve[AudioPolicyManager::VOLCNT] = {
5396    {1, -58.0f}, {20, -40.0f}, {60, -17.0f}, {100, 0.0f}
5397};
5398
5399const AudioPolicyManager::VolumeCurvePoint
5400    AudioPolicyManager::sExtMediaSystemVolumeCurve[AudioPolicyManager::VOLCNT] = {
5401    {1, -58.0f}, {20, -40.0f}, {60, -21.0f}, {100, -10.0f}
5402};
5403
5404const AudioPolicyManager::VolumeCurvePoint
5405    AudioPolicyManager::sSpeakerMediaVolumeCurve[AudioPolicyManager::VOLCNT] = {
5406    {1, -56.0f}, {20, -34.0f}, {60, -11.0f}, {100, 0.0f}
5407};
5408
5409const AudioPolicyManager::VolumeCurvePoint
5410    AudioPolicyManager::sSpeakerMediaVolumeCurveDrc[AudioPolicyManager::VOLCNT] = {
5411    {1, -55.0f}, {20, -43.0f}, {86, -12.0f}, {100, 0.0f}
5412};
5413
5414const AudioPolicyManager::VolumeCurvePoint
5415    AudioPolicyManager::sSpeakerSonificationVolumeCurve[AudioPolicyManager::VOLCNT] = {
5416    {1, -29.7f}, {33, -20.1f}, {66, -10.2f}, {100, 0.0f}
5417};
5418
5419const AudioPolicyManager::VolumeCurvePoint
5420    AudioPolicyManager::sSpeakerSonificationVolumeCurveDrc[AudioPolicyManager::VOLCNT] = {
5421    {1, -35.7f}, {33, -26.1f}, {66, -13.2f}, {100, 0.0f}
5422};
5423
5424// AUDIO_STREAM_SYSTEM, AUDIO_STREAM_ENFORCED_AUDIBLE and AUDIO_STREAM_DTMF volume tracks
5425// AUDIO_STREAM_RING on phones and AUDIO_STREAM_MUSIC on tablets.
5426// AUDIO_STREAM_DTMF tracks AUDIO_STREAM_VOICE_CALL while in call (See AudioService.java).
5427// The range is constrained between -24dB and -6dB over speaker and -30dB and -18dB over headset.
5428
5429const AudioPolicyManager::VolumeCurvePoint
5430    AudioPolicyManager::sDefaultSystemVolumeCurve[AudioPolicyManager::VOLCNT] = {
5431    {1, -24.0f}, {33, -18.0f}, {66, -12.0f}, {100, -6.0f}
5432};
5433
5434const AudioPolicyManager::VolumeCurvePoint
5435    AudioPolicyManager::sDefaultSystemVolumeCurveDrc[AudioPolicyManager::VOLCNT] = {
5436    {1, -34.0f}, {33, -24.0f}, {66, -15.0f}, {100, -6.0f}
5437};
5438
5439const AudioPolicyManager::VolumeCurvePoint
5440    AudioPolicyManager::sHeadsetSystemVolumeCurve[AudioPolicyManager::VOLCNT] = {
5441    {1, -30.0f}, {33, -26.0f}, {66, -22.0f}, {100, -18.0f}
5442};
5443
5444const AudioPolicyManager::VolumeCurvePoint
5445    AudioPolicyManager::sDefaultVoiceVolumeCurve[AudioPolicyManager::VOLCNT] = {
5446    {0, -42.0f}, {33, -28.0f}, {66, -14.0f}, {100, 0.0f}
5447};
5448
5449const AudioPolicyManager::VolumeCurvePoint
5450    AudioPolicyManager::sSpeakerVoiceVolumeCurve[AudioPolicyManager::VOLCNT] = {
5451    {0, -24.0f}, {33, -16.0f}, {66, -8.0f}, {100, 0.0f}
5452};
5453
5454const AudioPolicyManager::VolumeCurvePoint
5455    AudioPolicyManager::sLinearVolumeCurve[AudioPolicyManager::VOLCNT] = {
5456    {0, -96.0f}, {33, -68.0f}, {66, -34.0f}, {100, 0.0f}
5457};
5458
5459const AudioPolicyManager::VolumeCurvePoint
5460    AudioPolicyManager::sSilentVolumeCurve[AudioPolicyManager::VOLCNT] = {
5461    {0, -96.0f}, {1, -96.0f}, {2, -96.0f}, {100, -96.0f}
5462};
5463
5464const AudioPolicyManager::VolumeCurvePoint
5465    AudioPolicyManager::sFullScaleVolumeCurve[AudioPolicyManager::VOLCNT] = {
5466    {0, 0.0f}, {1, 0.0f}, {2, 0.0f}, {100, 0.0f}
5467};
5468
5469const AudioPolicyManager::VolumeCurvePoint
5470            *AudioPolicyManager::sVolumeProfiles[AUDIO_STREAM_CNT]
5471                                                   [AudioPolicyManager::DEVICE_CATEGORY_CNT] = {
5472    { // AUDIO_STREAM_VOICE_CALL
5473        sDefaultVoiceVolumeCurve, // DEVICE_CATEGORY_HEADSET
5474        sSpeakerVoiceVolumeCurve, // DEVICE_CATEGORY_SPEAKER
5475        sDefaultVoiceVolumeCurve, // DEVICE_CATEGORY_EARPIECE
5476        sDefaultMediaVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
5477    },
5478    { // AUDIO_STREAM_SYSTEM
5479        sHeadsetSystemVolumeCurve, // DEVICE_CATEGORY_HEADSET
5480        sDefaultSystemVolumeCurve, // DEVICE_CATEGORY_SPEAKER
5481        sDefaultSystemVolumeCurve,  // DEVICE_CATEGORY_EARPIECE
5482        sExtMediaSystemVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
5483    },
5484    { // AUDIO_STREAM_RING
5485        sDefaultVolumeCurve, // DEVICE_CATEGORY_HEADSET
5486        sSpeakerSonificationVolumeCurve, // DEVICE_CATEGORY_SPEAKER
5487        sDefaultVolumeCurve,  // DEVICE_CATEGORY_EARPIECE
5488        sExtMediaSystemVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
5489    },
5490    { // AUDIO_STREAM_MUSIC
5491        sDefaultMediaVolumeCurve, // DEVICE_CATEGORY_HEADSET
5492        sSpeakerMediaVolumeCurve, // DEVICE_CATEGORY_SPEAKER
5493        sDefaultMediaVolumeCurve, // DEVICE_CATEGORY_EARPIECE
5494        sDefaultMediaVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
5495    },
5496    { // AUDIO_STREAM_ALARM
5497        sDefaultVolumeCurve, // DEVICE_CATEGORY_HEADSET
5498        sSpeakerSonificationVolumeCurve, // DEVICE_CATEGORY_SPEAKER
5499        sDefaultVolumeCurve,  // DEVICE_CATEGORY_EARPIECE
5500        sExtMediaSystemVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
5501    },
5502    { // AUDIO_STREAM_NOTIFICATION
5503        sDefaultVolumeCurve, // DEVICE_CATEGORY_HEADSET
5504        sSpeakerSonificationVolumeCurve, // DEVICE_CATEGORY_SPEAKER
5505        sDefaultVolumeCurve,  // DEVICE_CATEGORY_EARPIECE
5506        sExtMediaSystemVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
5507    },
5508    { // AUDIO_STREAM_BLUETOOTH_SCO
5509        sDefaultVoiceVolumeCurve, // DEVICE_CATEGORY_HEADSET
5510        sSpeakerVoiceVolumeCurve, // DEVICE_CATEGORY_SPEAKER
5511        sDefaultVoiceVolumeCurve, // DEVICE_CATEGORY_EARPIECE
5512        sDefaultMediaVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
5513    },
5514    { // AUDIO_STREAM_ENFORCED_AUDIBLE
5515        sHeadsetSystemVolumeCurve, // DEVICE_CATEGORY_HEADSET
5516        sDefaultSystemVolumeCurve, // DEVICE_CATEGORY_SPEAKER
5517        sDefaultSystemVolumeCurve, // DEVICE_CATEGORY_EARPIECE
5518        sExtMediaSystemVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
5519    },
5520    {  // AUDIO_STREAM_DTMF
5521        sHeadsetSystemVolumeCurve, // DEVICE_CATEGORY_HEADSET
5522        sDefaultSystemVolumeCurve, // DEVICE_CATEGORY_SPEAKER
5523        sDefaultSystemVolumeCurve, // DEVICE_CATEGORY_EARPIECE
5524        sExtMediaSystemVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
5525    },
5526    { // AUDIO_STREAM_TTS
5527      // "Transmitted Through Speaker": always silent except on DEVICE_CATEGORY_SPEAKER
5528        sSilentVolumeCurve, // DEVICE_CATEGORY_HEADSET
5529        sLinearVolumeCurve, // DEVICE_CATEGORY_SPEAKER
5530        sSilentVolumeCurve, // DEVICE_CATEGORY_EARPIECE
5531        sSilentVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
5532    },
5533    { // AUDIO_STREAM_ACCESSIBILITY
5534        sDefaultMediaVolumeCurve, // DEVICE_CATEGORY_HEADSET
5535        sSpeakerMediaVolumeCurve, // DEVICE_CATEGORY_SPEAKER
5536        sDefaultMediaVolumeCurve, // DEVICE_CATEGORY_EARPIECE
5537        sDefaultMediaVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
5538    },
5539    { // AUDIO_STREAM_REROUTING
5540        sFullScaleVolumeCurve, // DEVICE_CATEGORY_HEADSET
5541        sFullScaleVolumeCurve, // DEVICE_CATEGORY_SPEAKER
5542        sFullScaleVolumeCurve, // DEVICE_CATEGORY_EARPIECE
5543        sFullScaleVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
5544    },
5545    { // AUDIO_STREAM_PATCH
5546        sFullScaleVolumeCurve, // DEVICE_CATEGORY_HEADSET
5547        sFullScaleVolumeCurve, // DEVICE_CATEGORY_SPEAKER
5548        sFullScaleVolumeCurve, // DEVICE_CATEGORY_EARPIECE
5549        sFullScaleVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
5550    },
5551};
5552
5553void AudioPolicyManager::initializeVolumeCurves()
5554{
5555    for (int i = 0; i < AUDIO_STREAM_CNT; i++) {
5556        for (int j = 0; j < DEVICE_CATEGORY_CNT; j++) {
5557            mStreams[i].mVolumeCurve[j] =
5558                    sVolumeProfiles[i][j];
5559        }
5560    }
5561
5562    // Check availability of DRC on speaker path: if available, override some of the speaker curves
5563    if (mSpeakerDrcEnabled) {
5564        mStreams[AUDIO_STREAM_SYSTEM].mVolumeCurve[DEVICE_CATEGORY_SPEAKER] =
5565                sDefaultSystemVolumeCurveDrc;
5566        mStreams[AUDIO_STREAM_RING].mVolumeCurve[DEVICE_CATEGORY_SPEAKER] =
5567                sSpeakerSonificationVolumeCurveDrc;
5568        mStreams[AUDIO_STREAM_ALARM].mVolumeCurve[DEVICE_CATEGORY_SPEAKER] =
5569                sSpeakerSonificationVolumeCurveDrc;
5570        mStreams[AUDIO_STREAM_NOTIFICATION].mVolumeCurve[DEVICE_CATEGORY_SPEAKER] =
5571                sSpeakerSonificationVolumeCurveDrc;
5572        mStreams[AUDIO_STREAM_MUSIC].mVolumeCurve[DEVICE_CATEGORY_SPEAKER] =
5573                sSpeakerMediaVolumeCurveDrc;
5574        mStreams[AUDIO_STREAM_ACCESSIBILITY].mVolumeCurve[DEVICE_CATEGORY_SPEAKER] =
5575                sSpeakerMediaVolumeCurveDrc;
5576    }
5577}
5578
5579float AudioPolicyManager::computeVolume(audio_stream_type_t stream,
5580                                            int index,
5581                                            audio_io_handle_t output,
5582                                            audio_devices_t device)
5583{
5584    float volume = 1.0;
5585    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
5586    StreamDescriptor &streamDesc = mStreams[stream];
5587
5588    if (device == AUDIO_DEVICE_NONE) {
5589        device = outputDesc->device();
5590    }
5591
5592    volume = volIndexToAmpl(device, streamDesc, index);
5593
5594    // if a headset is connected, apply the following rules to ring tones and notifications
5595    // to avoid sound level bursts in user's ears:
5596    // - always attenuate ring tones and notifications volume by 6dB
5597    // - if music is playing, always limit the volume to current music volume,
5598    // with a minimum threshold at -36dB so that notification is always perceived.
5599    const routing_strategy stream_strategy = getStrategy(stream);
5600    if ((device & (AUDIO_DEVICE_OUT_BLUETOOTH_A2DP |
5601            AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES |
5602            AUDIO_DEVICE_OUT_WIRED_HEADSET |
5603            AUDIO_DEVICE_OUT_WIRED_HEADPHONE)) &&
5604        ((stream_strategy == STRATEGY_SONIFICATION)
5605                || (stream_strategy == STRATEGY_SONIFICATION_RESPECTFUL)
5606                || (stream == AUDIO_STREAM_SYSTEM)
5607                || ((stream_strategy == STRATEGY_ENFORCED_AUDIBLE) &&
5608                    (mForceUse[AUDIO_POLICY_FORCE_FOR_SYSTEM] == AUDIO_POLICY_FORCE_NONE))) &&
5609        streamDesc.mCanBeMuted) {
5610        volume *= SONIFICATION_HEADSET_VOLUME_FACTOR;
5611        // when the phone is ringing we must consider that music could have been paused just before
5612        // by the music application and behave as if music was active if the last music track was
5613        // just stopped
5614        if (isStreamActive(AUDIO_STREAM_MUSIC, SONIFICATION_HEADSET_MUSIC_DELAY) ||
5615                mLimitRingtoneVolume) {
5616            audio_devices_t musicDevice = getDeviceForStrategy(STRATEGY_MEDIA, true /*fromCache*/);
5617            float musicVol = computeVolume(AUDIO_STREAM_MUSIC,
5618                               mStreams[AUDIO_STREAM_MUSIC].getVolumeIndex(musicDevice),
5619                               output,
5620                               musicDevice);
5621            float minVol = (musicVol > SONIFICATION_HEADSET_VOLUME_MIN) ?
5622                                musicVol : SONIFICATION_HEADSET_VOLUME_MIN;
5623            if (volume > minVol) {
5624                volume = minVol;
5625                ALOGV("computeVolume limiting volume to %f musicVol %f", minVol, musicVol);
5626            }
5627        }
5628    }
5629
5630    return volume;
5631}
5632
5633status_t AudioPolicyManager::checkAndSetVolume(audio_stream_type_t stream,
5634                                                   int index,
5635                                                   audio_io_handle_t output,
5636                                                   audio_devices_t device,
5637                                                   int delayMs,
5638                                                   bool force)
5639{
5640
5641    // do not change actual stream volume if the stream is muted
5642    if (mOutputs.valueFor(output)->mMuteCount[stream] != 0) {
5643        ALOGVV("checkAndSetVolume() stream %d muted count %d",
5644              stream, mOutputs.valueFor(output)->mMuteCount[stream]);
5645        return NO_ERROR;
5646    }
5647
5648    // do not change in call volume if bluetooth is connected and vice versa
5649    if ((stream == AUDIO_STREAM_VOICE_CALL &&
5650            mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION] == AUDIO_POLICY_FORCE_BT_SCO) ||
5651        (stream == AUDIO_STREAM_BLUETOOTH_SCO &&
5652                mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION] != AUDIO_POLICY_FORCE_BT_SCO)) {
5653        ALOGV("checkAndSetVolume() cannot set stream %d volume with force use = %d for comm",
5654             stream, mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION]);
5655        return INVALID_OPERATION;
5656    }
5657
5658    float volume = computeVolume(stream, index, output, device);
5659    // unit gain if rerouting to external policy
5660    if (device == AUDIO_DEVICE_OUT_REMOTE_SUBMIX) {
5661        ssize_t index = mOutputs.indexOfKey(output);
5662        if (index >= 0) {
5663            sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(index);
5664            if (outputDesc->mPolicyMix != NULL) {
5665                ALOGV("max gain when rerouting for output=%d", output);
5666                volume = 1.0f;
5667            }
5668        }
5669
5670    }
5671    // We actually change the volume if:
5672    // - the float value returned by computeVolume() changed
5673    // - the force flag is set
5674    if (volume != mOutputs.valueFor(output)->mCurVolume[stream] ||
5675            force) {
5676        mOutputs.valueFor(output)->mCurVolume[stream] = volume;
5677        ALOGVV("checkAndSetVolume() for output %d stream %d, volume %f, delay %d", output, stream, volume, delayMs);
5678        // Force VOICE_CALL to track BLUETOOTH_SCO stream volume when bluetooth audio is
5679        // enabled
5680        if (stream == AUDIO_STREAM_BLUETOOTH_SCO) {
5681            mpClientInterface->setStreamVolume(AUDIO_STREAM_VOICE_CALL, volume, output, delayMs);
5682        }
5683        mpClientInterface->setStreamVolume(stream, volume, output, delayMs);
5684    }
5685
5686    if (stream == AUDIO_STREAM_VOICE_CALL ||
5687        stream == AUDIO_STREAM_BLUETOOTH_SCO) {
5688        float voiceVolume;
5689        // Force voice volume to max for bluetooth SCO as volume is managed by the headset
5690        if (stream == AUDIO_STREAM_VOICE_CALL) {
5691            voiceVolume = (float)index/(float)mStreams[stream].mIndexMax;
5692        } else {
5693            voiceVolume = 1.0;
5694        }
5695
5696        if (voiceVolume != mLastVoiceVolume && output == mPrimaryOutput) {
5697            mpClientInterface->setVoiceVolume(voiceVolume, delayMs);
5698            mLastVoiceVolume = voiceVolume;
5699        }
5700    }
5701
5702    return NO_ERROR;
5703}
5704
5705void AudioPolicyManager::applyStreamVolumes(audio_io_handle_t output,
5706                                                audio_devices_t device,
5707                                                int delayMs,
5708                                                bool force)
5709{
5710    ALOGVV("applyStreamVolumes() for output %d and device %x", output, device);
5711
5712    for (int stream = 0; stream < AUDIO_STREAM_CNT; stream++) {
5713        if (stream == AUDIO_STREAM_PATCH) {
5714            continue;
5715        }
5716        checkAndSetVolume((audio_stream_type_t)stream,
5717                          mStreams[stream].getVolumeIndex(device),
5718                          output,
5719                          device,
5720                          delayMs,
5721                          force);
5722    }
5723}
5724
5725void AudioPolicyManager::setStrategyMute(routing_strategy strategy,
5726                                             bool on,
5727                                             audio_io_handle_t output,
5728                                             int delayMs,
5729                                             audio_devices_t device)
5730{
5731    ALOGVV("setStrategyMute() strategy %d, mute %d, output %d", strategy, on, output);
5732    for (int stream = 0; stream < AUDIO_STREAM_CNT; stream++) {
5733        if (stream == AUDIO_STREAM_PATCH) {
5734            continue;
5735        }
5736        if (getStrategy((audio_stream_type_t)stream) == strategy) {
5737            setStreamMute((audio_stream_type_t)stream, on, output, delayMs, device);
5738        }
5739    }
5740}
5741
5742void AudioPolicyManager::setStreamMute(audio_stream_type_t stream,
5743                                           bool on,
5744                                           audio_io_handle_t output,
5745                                           int delayMs,
5746                                           audio_devices_t device)
5747{
5748    StreamDescriptor &streamDesc = mStreams[stream];
5749    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
5750    if (device == AUDIO_DEVICE_NONE) {
5751        device = outputDesc->device();
5752    }
5753
5754    ALOGVV("setStreamMute() stream %d, mute %d, output %d, mMuteCount %d device %04x",
5755          stream, on, output, outputDesc->mMuteCount[stream], device);
5756
5757    if (on) {
5758        if (outputDesc->mMuteCount[stream] == 0) {
5759            if (streamDesc.mCanBeMuted &&
5760                    ((stream != AUDIO_STREAM_ENFORCED_AUDIBLE) ||
5761                     (mForceUse[AUDIO_POLICY_FORCE_FOR_SYSTEM] == AUDIO_POLICY_FORCE_NONE))) {
5762                checkAndSetVolume(stream, 0, output, device, delayMs);
5763            }
5764        }
5765        // increment mMuteCount after calling checkAndSetVolume() so that volume change is not ignored
5766        outputDesc->mMuteCount[stream]++;
5767    } else {
5768        if (outputDesc->mMuteCount[stream] == 0) {
5769            ALOGV("setStreamMute() unmuting non muted stream!");
5770            return;
5771        }
5772        if (--outputDesc->mMuteCount[stream] == 0) {
5773            checkAndSetVolume(stream,
5774                              streamDesc.getVolumeIndex(device),
5775                              output,
5776                              device,
5777                              delayMs);
5778        }
5779    }
5780}
5781
5782void AudioPolicyManager::handleIncallSonification(audio_stream_type_t stream,
5783                                                      bool starting, bool stateChange)
5784{
5785    // if the stream pertains to sonification strategy and we are in call we must
5786    // mute the stream if it is low visibility. If it is high visibility, we must play a tone
5787    // in the device used for phone strategy and play the tone if the selected device does not
5788    // interfere with the device used for phone strategy
5789    // if stateChange is true, we are called from setPhoneState() and we must mute or unmute as
5790    // many times as there are active tracks on the output
5791    const routing_strategy stream_strategy = getStrategy(stream);
5792    if ((stream_strategy == STRATEGY_SONIFICATION) ||
5793            ((stream_strategy == STRATEGY_SONIFICATION_RESPECTFUL))) {
5794        sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(mPrimaryOutput);
5795        ALOGV("handleIncallSonification() stream %d starting %d device %x stateChange %d",
5796                stream, starting, outputDesc->mDevice, stateChange);
5797        if (outputDesc->mRefCount[stream]) {
5798            int muteCount = 1;
5799            if (stateChange) {
5800                muteCount = outputDesc->mRefCount[stream];
5801            }
5802            if (audio_is_low_visibility(stream)) {
5803                ALOGV("handleIncallSonification() low visibility, muteCount %d", muteCount);
5804                for (int i = 0; i < muteCount; i++) {
5805                    setStreamMute(stream, starting, mPrimaryOutput);
5806                }
5807            } else {
5808                ALOGV("handleIncallSonification() high visibility");
5809                if (outputDesc->device() &
5810                        getDeviceForStrategy(STRATEGY_PHONE, true /*fromCache*/)) {
5811                    ALOGV("handleIncallSonification() high visibility muted, muteCount %d", muteCount);
5812                    for (int i = 0; i < muteCount; i++) {
5813                        setStreamMute(stream, starting, mPrimaryOutput);
5814                    }
5815                }
5816                if (starting) {
5817                    mpClientInterface->startTone(AUDIO_POLICY_TONE_IN_CALL_NOTIFICATION,
5818                                                 AUDIO_STREAM_VOICE_CALL);
5819                } else {
5820                    mpClientInterface->stopTone();
5821                }
5822            }
5823        }
5824    }
5825}
5826
5827bool AudioPolicyManager::isInCall()
5828{
5829    return isStateInCall(mPhoneState);
5830}
5831
5832bool AudioPolicyManager::isStateInCall(int state) {
5833    return ((state == AUDIO_MODE_IN_CALL) ||
5834            (state == AUDIO_MODE_IN_COMMUNICATION));
5835}
5836
5837uint32_t AudioPolicyManager::getMaxEffectsCpuLoad()
5838{
5839    return MAX_EFFECTS_CPU_LOAD;
5840}
5841
5842uint32_t AudioPolicyManager::getMaxEffectsMemory()
5843{
5844    return MAX_EFFECTS_MEMORY;
5845}
5846
5847
5848// --- AudioOutputDescriptor class implementation
5849
5850AudioPolicyManager::AudioOutputDescriptor::AudioOutputDescriptor(
5851        const sp<IOProfile>& profile)
5852    : mId(0), mIoHandle(0), mLatency(0),
5853    mFlags((audio_output_flags_t)0), mDevice(AUDIO_DEVICE_NONE), mPolicyMix(NULL),
5854    mPatchHandle(0),
5855    mOutput1(0), mOutput2(0), mProfile(profile), mDirectOpenCount(0)
5856{
5857    // clear usage count for all stream types
5858    for (int i = 0; i < AUDIO_STREAM_CNT; i++) {
5859        mRefCount[i] = 0;
5860        mCurVolume[i] = -1.0;
5861        mMuteCount[i] = 0;
5862        mStopTime[i] = 0;
5863    }
5864    for (int i = 0; i < NUM_STRATEGIES; i++) {
5865        mStrategyMutedByDevice[i] = false;
5866    }
5867    if (profile != NULL) {
5868        mFlags = (audio_output_flags_t)profile->mFlags;
5869        mSamplingRate = profile->pickSamplingRate();
5870        mFormat = profile->pickFormat();
5871        mChannelMask = profile->pickChannelMask();
5872        if (profile->mGains.size() > 0) {
5873            profile->mGains[0]->getDefaultConfig(&mGain);
5874        }
5875    }
5876}
5877
5878audio_devices_t AudioPolicyManager::AudioOutputDescriptor::device() const
5879{
5880    if (isDuplicated()) {
5881        return (audio_devices_t)(mOutput1->mDevice | mOutput2->mDevice);
5882    } else {
5883        return mDevice;
5884    }
5885}
5886
5887uint32_t AudioPolicyManager::AudioOutputDescriptor::latency()
5888{
5889    if (isDuplicated()) {
5890        return (mOutput1->mLatency > mOutput2->mLatency) ? mOutput1->mLatency : mOutput2->mLatency;
5891    } else {
5892        return mLatency;
5893    }
5894}
5895
5896bool AudioPolicyManager::AudioOutputDescriptor::sharesHwModuleWith(
5897        const sp<AudioOutputDescriptor> outputDesc)
5898{
5899    if (isDuplicated()) {
5900        return mOutput1->sharesHwModuleWith(outputDesc) || mOutput2->sharesHwModuleWith(outputDesc);
5901    } else if (outputDesc->isDuplicated()){
5902        return sharesHwModuleWith(outputDesc->mOutput1) || sharesHwModuleWith(outputDesc->mOutput2);
5903    } else {
5904        return (mProfile->mModule == outputDesc->mProfile->mModule);
5905    }
5906}
5907
5908void AudioPolicyManager::AudioOutputDescriptor::changeRefCount(audio_stream_type_t stream,
5909                                                                   int delta)
5910{
5911    // forward usage count change to attached outputs
5912    if (isDuplicated()) {
5913        mOutput1->changeRefCount(stream, delta);
5914        mOutput2->changeRefCount(stream, delta);
5915    }
5916    if ((delta + (int)mRefCount[stream]) < 0) {
5917        ALOGW("changeRefCount() invalid delta %d for stream %d, refCount %d",
5918              delta, stream, mRefCount[stream]);
5919        mRefCount[stream] = 0;
5920        return;
5921    }
5922    mRefCount[stream] += delta;
5923    ALOGV("changeRefCount() stream %d, count %d", stream, mRefCount[stream]);
5924}
5925
5926audio_devices_t AudioPolicyManager::AudioOutputDescriptor::supportedDevices()
5927{
5928    if (isDuplicated()) {
5929        return (audio_devices_t)(mOutput1->supportedDevices() | mOutput2->supportedDevices());
5930    } else {
5931        return mProfile->mSupportedDevices.types() ;
5932    }
5933}
5934
5935bool AudioPolicyManager::AudioOutputDescriptor::isActive(uint32_t inPastMs) const
5936{
5937    return isStrategyActive(NUM_STRATEGIES, inPastMs);
5938}
5939
5940bool AudioPolicyManager::AudioOutputDescriptor::isStrategyActive(routing_strategy strategy,
5941                                                                       uint32_t inPastMs,
5942                                                                       nsecs_t sysTime) const
5943{
5944    if ((sysTime == 0) && (inPastMs != 0)) {
5945        sysTime = systemTime();
5946    }
5947    for (int i = 0; i < (int)AUDIO_STREAM_CNT; i++) {
5948        if (i == AUDIO_STREAM_PATCH) {
5949            continue;
5950        }
5951        if (((getStrategy((audio_stream_type_t)i) == strategy) ||
5952                (NUM_STRATEGIES == strategy)) &&
5953                isStreamActive((audio_stream_type_t)i, inPastMs, sysTime)) {
5954            return true;
5955        }
5956    }
5957    return false;
5958}
5959
5960bool AudioPolicyManager::AudioOutputDescriptor::isStreamActive(audio_stream_type_t stream,
5961                                                                       uint32_t inPastMs,
5962                                                                       nsecs_t sysTime) const
5963{
5964    if (mRefCount[stream] != 0) {
5965        return true;
5966    }
5967    if (inPastMs == 0) {
5968        return false;
5969    }
5970    if (sysTime == 0) {
5971        sysTime = systemTime();
5972    }
5973    if (ns2ms(sysTime - mStopTime[stream]) < inPastMs) {
5974        return true;
5975    }
5976    return false;
5977}
5978
5979void AudioPolicyManager::AudioOutputDescriptor::toAudioPortConfig(
5980                                                 struct audio_port_config *dstConfig,
5981                                                 const struct audio_port_config *srcConfig) const
5982{
5983    ALOG_ASSERT(!isDuplicated(), "toAudioPortConfig() called on duplicated output %d", mIoHandle);
5984
5985    dstConfig->config_mask = AUDIO_PORT_CONFIG_SAMPLE_RATE|AUDIO_PORT_CONFIG_CHANNEL_MASK|
5986                            AUDIO_PORT_CONFIG_FORMAT|AUDIO_PORT_CONFIG_GAIN;
5987    if (srcConfig != NULL) {
5988        dstConfig->config_mask |= srcConfig->config_mask;
5989    }
5990    AudioPortConfig::toAudioPortConfig(dstConfig, srcConfig);
5991
5992    dstConfig->id = mId;
5993    dstConfig->role = AUDIO_PORT_ROLE_SOURCE;
5994    dstConfig->type = AUDIO_PORT_TYPE_MIX;
5995    dstConfig->ext.mix.hw_module = mProfile->mModule->mHandle;
5996    dstConfig->ext.mix.handle = mIoHandle;
5997    dstConfig->ext.mix.usecase.stream = AUDIO_STREAM_DEFAULT;
5998}
5999
6000void AudioPolicyManager::AudioOutputDescriptor::toAudioPort(
6001                                                    struct audio_port *port) const
6002{
6003    ALOG_ASSERT(!isDuplicated(), "toAudioPort() called on duplicated output %d", mIoHandle);
6004    mProfile->toAudioPort(port);
6005    port->id = mId;
6006    toAudioPortConfig(&port->active_config);
6007    port->ext.mix.hw_module = mProfile->mModule->mHandle;
6008    port->ext.mix.handle = mIoHandle;
6009    port->ext.mix.latency_class =
6010            mFlags & AUDIO_OUTPUT_FLAG_FAST ? AUDIO_LATENCY_LOW : AUDIO_LATENCY_NORMAL;
6011}
6012
6013status_t AudioPolicyManager::AudioOutputDescriptor::dump(int fd)
6014{
6015    const size_t SIZE = 256;
6016    char buffer[SIZE];
6017    String8 result;
6018
6019    snprintf(buffer, SIZE, " ID: %d\n", mId);
6020    result.append(buffer);
6021    snprintf(buffer, SIZE, " Sampling rate: %d\n", mSamplingRate);
6022    result.append(buffer);
6023    snprintf(buffer, SIZE, " Format: %08x\n", mFormat);
6024    result.append(buffer);
6025    snprintf(buffer, SIZE, " Channels: %08x\n", mChannelMask);
6026    result.append(buffer);
6027    snprintf(buffer, SIZE, " Latency: %d\n", mLatency);
6028    result.append(buffer);
6029    snprintf(buffer, SIZE, " Flags %08x\n", mFlags);
6030    result.append(buffer);
6031    snprintf(buffer, SIZE, " Devices %08x\n", device());
6032    result.append(buffer);
6033    snprintf(buffer, SIZE, " Stream volume refCount muteCount\n");
6034    result.append(buffer);
6035    for (int i = 0; i < (int)AUDIO_STREAM_CNT; i++) {
6036        snprintf(buffer, SIZE, " %02d     %.03f     %02d       %02d\n",
6037                 i, mCurVolume[i], mRefCount[i], mMuteCount[i]);
6038        result.append(buffer);
6039    }
6040    write(fd, result.string(), result.size());
6041
6042    return NO_ERROR;
6043}
6044
6045// --- AudioInputDescriptor class implementation
6046
6047AudioPolicyManager::AudioInputDescriptor::AudioInputDescriptor(const sp<IOProfile>& profile)
6048    : mId(0), mIoHandle(0),
6049      mDevice(AUDIO_DEVICE_NONE), mPolicyMix(NULL), mPatchHandle(0), mRefCount(0),
6050      mInputSource(AUDIO_SOURCE_DEFAULT), mProfile(profile), mIsSoundTrigger(false)
6051{
6052    if (profile != NULL) {
6053        mSamplingRate = profile->pickSamplingRate();
6054        mFormat = profile->pickFormat();
6055        mChannelMask = profile->pickChannelMask();
6056        if (profile->mGains.size() > 0) {
6057            profile->mGains[0]->getDefaultConfig(&mGain);
6058        }
6059    }
6060}
6061
6062void AudioPolicyManager::AudioInputDescriptor::toAudioPortConfig(
6063                                                   struct audio_port_config *dstConfig,
6064                                                   const struct audio_port_config *srcConfig) const
6065{
6066    ALOG_ASSERT(mProfile != 0,
6067                "toAudioPortConfig() called on input with null profile %d", mIoHandle);
6068    dstConfig->config_mask = AUDIO_PORT_CONFIG_SAMPLE_RATE|AUDIO_PORT_CONFIG_CHANNEL_MASK|
6069                            AUDIO_PORT_CONFIG_FORMAT|AUDIO_PORT_CONFIG_GAIN;
6070    if (srcConfig != NULL) {
6071        dstConfig->config_mask |= srcConfig->config_mask;
6072    }
6073
6074    AudioPortConfig::toAudioPortConfig(dstConfig, srcConfig);
6075
6076    dstConfig->id = mId;
6077    dstConfig->role = AUDIO_PORT_ROLE_SINK;
6078    dstConfig->type = AUDIO_PORT_TYPE_MIX;
6079    dstConfig->ext.mix.hw_module = mProfile->mModule->mHandle;
6080    dstConfig->ext.mix.handle = mIoHandle;
6081    dstConfig->ext.mix.usecase.source = mInputSource;
6082}
6083
6084void AudioPolicyManager::AudioInputDescriptor::toAudioPort(
6085                                                    struct audio_port *port) const
6086{
6087    ALOG_ASSERT(mProfile != 0, "toAudioPort() called on input with null profile %d", mIoHandle);
6088
6089    mProfile->toAudioPort(port);
6090    port->id = mId;
6091    toAudioPortConfig(&port->active_config);
6092    port->ext.mix.hw_module = mProfile->mModule->mHandle;
6093    port->ext.mix.handle = mIoHandle;
6094    port->ext.mix.latency_class = AUDIO_LATENCY_NORMAL;
6095}
6096
6097status_t AudioPolicyManager::AudioInputDescriptor::dump(int fd)
6098{
6099    const size_t SIZE = 256;
6100    char buffer[SIZE];
6101    String8 result;
6102
6103    snprintf(buffer, SIZE, " ID: %d\n", mId);
6104    result.append(buffer);
6105    snprintf(buffer, SIZE, " Sampling rate: %d\n", mSamplingRate);
6106    result.append(buffer);
6107    snprintf(buffer, SIZE, " Format: %d\n", mFormat);
6108    result.append(buffer);
6109    snprintf(buffer, SIZE, " Channels: %08x\n", mChannelMask);
6110    result.append(buffer);
6111    snprintf(buffer, SIZE, " Devices %08x\n", mDevice);
6112    result.append(buffer);
6113    snprintf(buffer, SIZE, " Ref Count %d\n", mRefCount);
6114    result.append(buffer);
6115    snprintf(buffer, SIZE, " Open Ref Count %d\n", mOpenRefCount);
6116    result.append(buffer);
6117
6118    write(fd, result.string(), result.size());
6119
6120    return NO_ERROR;
6121}
6122
6123// --- StreamDescriptor class implementation
6124
6125AudioPolicyManager::StreamDescriptor::StreamDescriptor()
6126    :   mIndexMin(0), mIndexMax(1), mCanBeMuted(true)
6127{
6128    mIndexCur.add(AUDIO_DEVICE_OUT_DEFAULT, 0);
6129}
6130
6131int AudioPolicyManager::StreamDescriptor::getVolumeIndex(audio_devices_t device)
6132{
6133    device = AudioPolicyManager::getDeviceForVolume(device);
6134    // there is always a valid entry for AUDIO_DEVICE_OUT_DEFAULT
6135    if (mIndexCur.indexOfKey(device) < 0) {
6136        device = AUDIO_DEVICE_OUT_DEFAULT;
6137    }
6138    return mIndexCur.valueFor(device);
6139}
6140
6141void AudioPolicyManager::StreamDescriptor::dump(int fd)
6142{
6143    const size_t SIZE = 256;
6144    char buffer[SIZE];
6145    String8 result;
6146
6147    snprintf(buffer, SIZE, "%s         %02d         %02d         ",
6148             mCanBeMuted ? "true " : "false", mIndexMin, mIndexMax);
6149    result.append(buffer);
6150    for (size_t i = 0; i < mIndexCur.size(); i++) {
6151        snprintf(buffer, SIZE, "%04x : %02d, ",
6152                 mIndexCur.keyAt(i),
6153                 mIndexCur.valueAt(i));
6154        result.append(buffer);
6155    }
6156    result.append("\n");
6157
6158    write(fd, result.string(), result.size());
6159}
6160
6161// --- EffectDescriptor class implementation
6162
6163status_t AudioPolicyManager::EffectDescriptor::dump(int fd)
6164{
6165    const size_t SIZE = 256;
6166    char buffer[SIZE];
6167    String8 result;
6168
6169    snprintf(buffer, SIZE, " I/O: %d\n", mIo);
6170    result.append(buffer);
6171    snprintf(buffer, SIZE, " Strategy: %d\n", mStrategy);
6172    result.append(buffer);
6173    snprintf(buffer, SIZE, " Session: %d\n", mSession);
6174    result.append(buffer);
6175    snprintf(buffer, SIZE, " Name: %s\n",  mDesc.name);
6176    result.append(buffer);
6177    snprintf(buffer, SIZE, " %s\n",  mEnabled ? "Enabled" : "Disabled");
6178    result.append(buffer);
6179    write(fd, result.string(), result.size());
6180
6181    return NO_ERROR;
6182}
6183
6184// --- HwModule class implementation
6185
6186AudioPolicyManager::HwModule::HwModule(const char *name)
6187    : mName(strndup(name, AUDIO_HARDWARE_MODULE_ID_MAX_LEN)),
6188      mHalVersion(AUDIO_DEVICE_API_VERSION_MIN), mHandle(0)
6189{
6190}
6191
6192AudioPolicyManager::HwModule::~HwModule()
6193{
6194    for (size_t i = 0; i < mOutputProfiles.size(); i++) {
6195        mOutputProfiles[i]->mSupportedDevices.clear();
6196    }
6197    for (size_t i = 0; i < mInputProfiles.size(); i++) {
6198        mInputProfiles[i]->mSupportedDevices.clear();
6199    }
6200    free((void *)mName);
6201}
6202
6203status_t AudioPolicyManager::HwModule::loadInput(cnode *root)
6204{
6205    cnode *node = root->first_child;
6206
6207    sp<IOProfile> profile = new IOProfile(String8(root->name), AUDIO_PORT_ROLE_SINK, this);
6208
6209    while (node) {
6210        if (strcmp(node->name, SAMPLING_RATES_TAG) == 0) {
6211            profile->loadSamplingRates((char *)node->value);
6212        } else if (strcmp(node->name, FORMATS_TAG) == 0) {
6213            profile->loadFormats((char *)node->value);
6214        } else if (strcmp(node->name, CHANNELS_TAG) == 0) {
6215            profile->loadInChannels((char *)node->value);
6216        } else if (strcmp(node->name, DEVICES_TAG) == 0) {
6217            profile->mSupportedDevices.loadDevicesFromName((char *)node->value,
6218                                                           mDeclaredDevices);
6219        } else if (strcmp(node->name, FLAGS_TAG) == 0) {
6220            profile->mFlags = parseInputFlagNames((char *)node->value);
6221        } else if (strcmp(node->name, GAINS_TAG) == 0) {
6222            profile->loadGains(node);
6223        }
6224        node = node->next;
6225    }
6226    ALOGW_IF(profile->mSupportedDevices.isEmpty(),
6227            "loadInput() invalid supported devices");
6228    ALOGW_IF(profile->mChannelMasks.size() == 0,
6229            "loadInput() invalid supported channel masks");
6230    ALOGW_IF(profile->mSamplingRates.size() == 0,
6231            "loadInput() invalid supported sampling rates");
6232    ALOGW_IF(profile->mFormats.size() == 0,
6233            "loadInput() invalid supported formats");
6234    if (!profile->mSupportedDevices.isEmpty() &&
6235            (profile->mChannelMasks.size() != 0) &&
6236            (profile->mSamplingRates.size() != 0) &&
6237            (profile->mFormats.size() != 0)) {
6238
6239        ALOGV("loadInput() adding input Supported Devices %04x",
6240              profile->mSupportedDevices.types());
6241
6242        mInputProfiles.add(profile);
6243        return NO_ERROR;
6244    } else {
6245        return BAD_VALUE;
6246    }
6247}
6248
6249status_t AudioPolicyManager::HwModule::loadOutput(cnode *root)
6250{
6251    cnode *node = root->first_child;
6252
6253    sp<IOProfile> profile = new IOProfile(String8(root->name), AUDIO_PORT_ROLE_SOURCE, this);
6254
6255    while (node) {
6256        if (strcmp(node->name, SAMPLING_RATES_TAG) == 0) {
6257            profile->loadSamplingRates((char *)node->value);
6258        } else if (strcmp(node->name, FORMATS_TAG) == 0) {
6259            profile->loadFormats((char *)node->value);
6260        } else if (strcmp(node->name, CHANNELS_TAG) == 0) {
6261            profile->loadOutChannels((char *)node->value);
6262        } else if (strcmp(node->name, DEVICES_TAG) == 0) {
6263            profile->mSupportedDevices.loadDevicesFromName((char *)node->value,
6264                                                           mDeclaredDevices);
6265        } else if (strcmp(node->name, FLAGS_TAG) == 0) {
6266            profile->mFlags = parseOutputFlagNames((char *)node->value);
6267        } else if (strcmp(node->name, GAINS_TAG) == 0) {
6268            profile->loadGains(node);
6269        }
6270        node = node->next;
6271    }
6272    ALOGW_IF(profile->mSupportedDevices.isEmpty(),
6273            "loadOutput() invalid supported devices");
6274    ALOGW_IF(profile->mChannelMasks.size() == 0,
6275            "loadOutput() invalid supported channel masks");
6276    ALOGW_IF(profile->mSamplingRates.size() == 0,
6277            "loadOutput() invalid supported sampling rates");
6278    ALOGW_IF(profile->mFormats.size() == 0,
6279            "loadOutput() invalid supported formats");
6280    if (!profile->mSupportedDevices.isEmpty() &&
6281            (profile->mChannelMasks.size() != 0) &&
6282            (profile->mSamplingRates.size() != 0) &&
6283            (profile->mFormats.size() != 0)) {
6284
6285        ALOGV("loadOutput() adding output Supported Devices %04x, mFlags %04x",
6286              profile->mSupportedDevices.types(), profile->mFlags);
6287
6288        mOutputProfiles.add(profile);
6289        return NO_ERROR;
6290    } else {
6291        return BAD_VALUE;
6292    }
6293}
6294
6295status_t AudioPolicyManager::HwModule::loadDevice(cnode *root)
6296{
6297    cnode *node = root->first_child;
6298
6299    audio_devices_t type = AUDIO_DEVICE_NONE;
6300    while (node) {
6301        if (strcmp(node->name, DEVICE_TYPE) == 0) {
6302            type = parseDeviceNames((char *)node->value);
6303            break;
6304        }
6305        node = node->next;
6306    }
6307    if (type == AUDIO_DEVICE_NONE ||
6308            (!audio_is_input_device(type) && !audio_is_output_device(type))) {
6309        ALOGW("loadDevice() bad type %08x", type);
6310        return BAD_VALUE;
6311    }
6312    sp<DeviceDescriptor> deviceDesc = new DeviceDescriptor(String8(root->name), type);
6313    deviceDesc->mModule = this;
6314
6315    node = root->first_child;
6316    while (node) {
6317        if (strcmp(node->name, DEVICE_ADDRESS) == 0) {
6318            deviceDesc->mAddress = String8((char *)node->value);
6319        } else if (strcmp(node->name, CHANNELS_TAG) == 0) {
6320            if (audio_is_input_device(type)) {
6321                deviceDesc->loadInChannels((char *)node->value);
6322            } else {
6323                deviceDesc->loadOutChannels((char *)node->value);
6324            }
6325        } else if (strcmp(node->name, GAINS_TAG) == 0) {
6326            deviceDesc->loadGains(node);
6327        }
6328        node = node->next;
6329    }
6330
6331    ALOGV("loadDevice() adding device name %s type %08x address %s",
6332          deviceDesc->mName.string(), type, deviceDesc->mAddress.string());
6333
6334    mDeclaredDevices.add(deviceDesc);
6335
6336    return NO_ERROR;
6337}
6338
6339status_t AudioPolicyManager::HwModule::addOutputProfile(String8 name, const audio_config_t *config,
6340                                                  audio_devices_t device, String8 address)
6341{
6342    sp<IOProfile> profile = new IOProfile(name, AUDIO_PORT_ROLE_SOURCE, this);
6343
6344    profile->mSamplingRates.add(config->sample_rate);
6345    profile->mChannelMasks.add(config->channel_mask);
6346    profile->mFormats.add(config->format);
6347
6348    sp<DeviceDescriptor> devDesc = new DeviceDescriptor(String8(""), device);
6349    devDesc->mAddress = address;
6350    profile->mSupportedDevices.add(devDesc);
6351
6352    mOutputProfiles.add(profile);
6353
6354    return NO_ERROR;
6355}
6356
6357status_t AudioPolicyManager::HwModule::removeOutputProfile(String8 name)
6358{
6359    for (size_t i = 0; i < mOutputProfiles.size(); i++) {
6360        if (mOutputProfiles[i]->mName == name) {
6361            mOutputProfiles.removeAt(i);
6362            break;
6363        }
6364    }
6365
6366    return NO_ERROR;
6367}
6368
6369status_t AudioPolicyManager::HwModule::addInputProfile(String8 name, const audio_config_t *config,
6370                                                  audio_devices_t device, String8 address)
6371{
6372    sp<IOProfile> profile = new IOProfile(name, AUDIO_PORT_ROLE_SINK, this);
6373
6374    profile->mSamplingRates.add(config->sample_rate);
6375    profile->mChannelMasks.add(config->channel_mask);
6376    profile->mFormats.add(config->format);
6377
6378    sp<DeviceDescriptor> devDesc = new DeviceDescriptor(String8(""), device);
6379    devDesc->mAddress = address;
6380    profile->mSupportedDevices.add(devDesc);
6381
6382    ALOGV("addInputProfile() name %s rate %d mask 0x08", name.string(), config->sample_rate, config->channel_mask);
6383
6384    mInputProfiles.add(profile);
6385
6386    return NO_ERROR;
6387}
6388
6389status_t AudioPolicyManager::HwModule::removeInputProfile(String8 name)
6390{
6391    for (size_t i = 0; i < mInputProfiles.size(); i++) {
6392        if (mInputProfiles[i]->mName == name) {
6393            mInputProfiles.removeAt(i);
6394            break;
6395        }
6396    }
6397
6398    return NO_ERROR;
6399}
6400
6401
6402void AudioPolicyManager::HwModule::dump(int fd)
6403{
6404    const size_t SIZE = 256;
6405    char buffer[SIZE];
6406    String8 result;
6407
6408    snprintf(buffer, SIZE, "  - name: %s\n", mName);
6409    result.append(buffer);
6410    snprintf(buffer, SIZE, "  - handle: %d\n", mHandle);
6411    result.append(buffer);
6412    snprintf(buffer, SIZE, "  - version: %u.%u\n", mHalVersion >> 8, mHalVersion & 0xFF);
6413    result.append(buffer);
6414    write(fd, result.string(), result.size());
6415    if (mOutputProfiles.size()) {
6416        write(fd, "  - outputs:\n", strlen("  - outputs:\n"));
6417        for (size_t i = 0; i < mOutputProfiles.size(); i++) {
6418            snprintf(buffer, SIZE, "    output %zu:\n", i);
6419            write(fd, buffer, strlen(buffer));
6420            mOutputProfiles[i]->dump(fd);
6421        }
6422    }
6423    if (mInputProfiles.size()) {
6424        write(fd, "  - inputs:\n", strlen("  - inputs:\n"));
6425        for (size_t i = 0; i < mInputProfiles.size(); i++) {
6426            snprintf(buffer, SIZE, "    input %zu:\n", i);
6427            write(fd, buffer, strlen(buffer));
6428            mInputProfiles[i]->dump(fd);
6429        }
6430    }
6431    if (mDeclaredDevices.size()) {
6432        write(fd, "  - devices:\n", strlen("  - devices:\n"));
6433        for (size_t i = 0; i < mDeclaredDevices.size(); i++) {
6434            mDeclaredDevices[i]->dump(fd, 4, i);
6435        }
6436    }
6437}
6438
6439// --- AudioPort class implementation
6440
6441
6442AudioPolicyManager::AudioPort::AudioPort(const String8& name, audio_port_type_t type,
6443          audio_port_role_t role, const sp<HwModule>& module) :
6444    mName(name), mType(type), mRole(role), mModule(module), mFlags(0)
6445{
6446    mUseInChannelMask = ((type == AUDIO_PORT_TYPE_DEVICE) && (role == AUDIO_PORT_ROLE_SOURCE)) ||
6447                    ((type == AUDIO_PORT_TYPE_MIX) && (role == AUDIO_PORT_ROLE_SINK));
6448}
6449
6450void AudioPolicyManager::AudioPort::toAudioPort(struct audio_port *port) const
6451{
6452    port->role = mRole;
6453    port->type = mType;
6454    unsigned int i;
6455    for (i = 0; i < mSamplingRates.size() && i < AUDIO_PORT_MAX_SAMPLING_RATES; i++) {
6456        if (mSamplingRates[i] != 0) {
6457            port->sample_rates[i] = mSamplingRates[i];
6458        }
6459    }
6460    port->num_sample_rates = i;
6461    for (i = 0; i < mChannelMasks.size() && i < AUDIO_PORT_MAX_CHANNEL_MASKS; i++) {
6462        if (mChannelMasks[i] != 0) {
6463            port->channel_masks[i] = mChannelMasks[i];
6464        }
6465    }
6466    port->num_channel_masks = i;
6467    for (i = 0; i < mFormats.size() && i < AUDIO_PORT_MAX_FORMATS; i++) {
6468        if (mFormats[i] != 0) {
6469            port->formats[i] = mFormats[i];
6470        }
6471    }
6472    port->num_formats = i;
6473
6474    ALOGV("AudioPort::toAudioPort() num gains %zu", mGains.size());
6475
6476    for (i = 0; i < mGains.size() && i < AUDIO_PORT_MAX_GAINS; i++) {
6477        port->gains[i] = mGains[i]->mGain;
6478    }
6479    port->num_gains = i;
6480}
6481
6482void AudioPolicyManager::AudioPort::importAudioPort(const sp<AudioPort> port) {
6483    for (size_t k = 0 ; k < port->mSamplingRates.size() ; k++) {
6484        const uint32_t rate = port->mSamplingRates.itemAt(k);
6485        if (rate != 0) { // skip "dynamic" rates
6486            bool hasRate = false;
6487            for (size_t l = 0 ; l < mSamplingRates.size() ; l++) {
6488                if (rate == mSamplingRates.itemAt(l)) {
6489                    hasRate = true;
6490                    break;
6491                }
6492            }
6493            if (!hasRate) { // never import a sampling rate twice
6494                mSamplingRates.add(rate);
6495            }
6496        }
6497    }
6498    for (size_t k = 0 ; k < port->mChannelMasks.size() ; k++) {
6499        const audio_channel_mask_t mask = port->mChannelMasks.itemAt(k);
6500        if (mask != 0) { // skip "dynamic" masks
6501            bool hasMask = false;
6502            for (size_t l = 0 ; l < mChannelMasks.size() ; l++) {
6503                if (mask == mChannelMasks.itemAt(l)) {
6504                    hasMask = true;
6505                    break;
6506                }
6507            }
6508            if (!hasMask) { // never import a channel mask twice
6509                mChannelMasks.add(mask);
6510            }
6511        }
6512    }
6513    for (size_t k = 0 ; k < port->mFormats.size() ; k++) {
6514        const audio_format_t format = port->mFormats.itemAt(k);
6515        if (format != 0) { // skip "dynamic" formats
6516            bool hasFormat = false;
6517            for (size_t l = 0 ; l < mFormats.size() ; l++) {
6518                if (format == mFormats.itemAt(l)) {
6519                    hasFormat = true;
6520                    break;
6521                }
6522            }
6523            if (!hasFormat) { // never import a channel mask twice
6524                mFormats.add(format);
6525            }
6526        }
6527    }
6528    for (size_t k = 0 ; k < port->mGains.size() ; k++) {
6529        sp<AudioGain> gain = port->mGains.itemAt(k);
6530        if (gain != 0) {
6531            bool hasGain = false;
6532            for (size_t l = 0 ; l < mGains.size() ; l++) {
6533                if (gain == mGains.itemAt(l)) {
6534                    hasGain = true;
6535                    break;
6536                }
6537            }
6538            if (!hasGain) { // never import a gain twice
6539                mGains.add(gain);
6540            }
6541        }
6542    }
6543}
6544
6545void AudioPolicyManager::AudioPort::clearCapabilities() {
6546    mChannelMasks.clear();
6547    mFormats.clear();
6548    mSamplingRates.clear();
6549    mGains.clear();
6550}
6551
6552void AudioPolicyManager::AudioPort::loadSamplingRates(char *name)
6553{
6554    char *str = strtok(name, "|");
6555
6556    // by convention, "0' in the first entry in mSamplingRates indicates the supported sampling
6557    // rates should be read from the output stream after it is opened for the first time
6558    if (str != NULL && strcmp(str, DYNAMIC_VALUE_TAG) == 0) {
6559        mSamplingRates.add(0);
6560        return;
6561    }
6562
6563    while (str != NULL) {
6564        uint32_t rate = atoi(str);
6565        if (rate != 0) {
6566            ALOGV("loadSamplingRates() adding rate %d", rate);
6567            mSamplingRates.add(rate);
6568        }
6569        str = strtok(NULL, "|");
6570    }
6571}
6572
6573void AudioPolicyManager::AudioPort::loadFormats(char *name)
6574{
6575    char *str = strtok(name, "|");
6576
6577    // by convention, "0' in the first entry in mFormats indicates the supported formats
6578    // should be read from the output stream after it is opened for the first time
6579    if (str != NULL && strcmp(str, DYNAMIC_VALUE_TAG) == 0) {
6580        mFormats.add(AUDIO_FORMAT_DEFAULT);
6581        return;
6582    }
6583
6584    while (str != NULL) {
6585        audio_format_t format = (audio_format_t)stringToEnum(sFormatNameToEnumTable,
6586                                                             ARRAY_SIZE(sFormatNameToEnumTable),
6587                                                             str);
6588        if (format != AUDIO_FORMAT_DEFAULT) {
6589            mFormats.add(format);
6590        }
6591        str = strtok(NULL, "|");
6592    }
6593}
6594
6595void AudioPolicyManager::AudioPort::loadInChannels(char *name)
6596{
6597    const char *str = strtok(name, "|");
6598
6599    ALOGV("loadInChannels() %s", name);
6600
6601    if (str != NULL && strcmp(str, DYNAMIC_VALUE_TAG) == 0) {
6602        mChannelMasks.add(0);
6603        return;
6604    }
6605
6606    while (str != NULL) {
6607        audio_channel_mask_t channelMask =
6608                (audio_channel_mask_t)stringToEnum(sInChannelsNameToEnumTable,
6609                                                   ARRAY_SIZE(sInChannelsNameToEnumTable),
6610                                                   str);
6611        if (channelMask != 0) {
6612            ALOGV("loadInChannels() adding channelMask %04x", channelMask);
6613            mChannelMasks.add(channelMask);
6614        }
6615        str = strtok(NULL, "|");
6616    }
6617}
6618
6619void AudioPolicyManager::AudioPort::loadOutChannels(char *name)
6620{
6621    const char *str = strtok(name, "|");
6622
6623    ALOGV("loadOutChannels() %s", name);
6624
6625    // by convention, "0' in the first entry in mChannelMasks indicates the supported channel
6626    // masks should be read from the output stream after it is opened for the first time
6627    if (str != NULL && strcmp(str, DYNAMIC_VALUE_TAG) == 0) {
6628        mChannelMasks.add(0);
6629        return;
6630    }
6631
6632    while (str != NULL) {
6633        audio_channel_mask_t channelMask =
6634                (audio_channel_mask_t)stringToEnum(sOutChannelsNameToEnumTable,
6635                                                   ARRAY_SIZE(sOutChannelsNameToEnumTable),
6636                                                   str);
6637        if (channelMask != 0) {
6638            mChannelMasks.add(channelMask);
6639        }
6640        str = strtok(NULL, "|");
6641    }
6642    return;
6643}
6644
6645audio_gain_mode_t AudioPolicyManager::AudioPort::loadGainMode(char *name)
6646{
6647    const char *str = strtok(name, "|");
6648
6649    ALOGV("loadGainMode() %s", name);
6650    audio_gain_mode_t mode = 0;
6651    while (str != NULL) {
6652        mode |= (audio_gain_mode_t)stringToEnum(sGainModeNameToEnumTable,
6653                                                ARRAY_SIZE(sGainModeNameToEnumTable),
6654                                                str);
6655        str = strtok(NULL, "|");
6656    }
6657    return mode;
6658}
6659
6660void AudioPolicyManager::AudioPort::loadGain(cnode *root, int index)
6661{
6662    cnode *node = root->first_child;
6663
6664    sp<AudioGain> gain = new AudioGain(index, mUseInChannelMask);
6665
6666    while (node) {
6667        if (strcmp(node->name, GAIN_MODE) == 0) {
6668            gain->mGain.mode = loadGainMode((char *)node->value);
6669        } else if (strcmp(node->name, GAIN_CHANNELS) == 0) {
6670            if (mUseInChannelMask) {
6671                gain->mGain.channel_mask =
6672                        (audio_channel_mask_t)stringToEnum(sInChannelsNameToEnumTable,
6673                                                           ARRAY_SIZE(sInChannelsNameToEnumTable),
6674                                                           (char *)node->value);
6675            } else {
6676                gain->mGain.channel_mask =
6677                        (audio_channel_mask_t)stringToEnum(sOutChannelsNameToEnumTable,
6678                                                           ARRAY_SIZE(sOutChannelsNameToEnumTable),
6679                                                           (char *)node->value);
6680            }
6681        } else if (strcmp(node->name, GAIN_MIN_VALUE) == 0) {
6682            gain->mGain.min_value = atoi((char *)node->value);
6683        } else if (strcmp(node->name, GAIN_MAX_VALUE) == 0) {
6684            gain->mGain.max_value = atoi((char *)node->value);
6685        } else if (strcmp(node->name, GAIN_DEFAULT_VALUE) == 0) {
6686            gain->mGain.default_value = atoi((char *)node->value);
6687        } else if (strcmp(node->name, GAIN_STEP_VALUE) == 0) {
6688            gain->mGain.step_value = atoi((char *)node->value);
6689        } else if (strcmp(node->name, GAIN_MIN_RAMP_MS) == 0) {
6690            gain->mGain.min_ramp_ms = atoi((char *)node->value);
6691        } else if (strcmp(node->name, GAIN_MAX_RAMP_MS) == 0) {
6692            gain->mGain.max_ramp_ms = atoi((char *)node->value);
6693        }
6694        node = node->next;
6695    }
6696
6697    ALOGV("loadGain() adding new gain mode %08x channel mask %08x min mB %d max mB %d",
6698          gain->mGain.mode, gain->mGain.channel_mask, gain->mGain.min_value, gain->mGain.max_value);
6699
6700    if (gain->mGain.mode == 0) {
6701        return;
6702    }
6703    mGains.add(gain);
6704}
6705
6706void AudioPolicyManager::AudioPort::loadGains(cnode *root)
6707{
6708    cnode *node = root->first_child;
6709    int index = 0;
6710    while (node) {
6711        ALOGV("loadGains() loading gain %s", node->name);
6712        loadGain(node, index++);
6713        node = node->next;
6714    }
6715}
6716
6717status_t AudioPolicyManager::AudioPort::checkExactSamplingRate(uint32_t samplingRate) const
6718{
6719    if (mSamplingRates.isEmpty()) {
6720        return NO_ERROR;
6721    }
6722
6723    for (size_t i = 0; i < mSamplingRates.size(); i ++) {
6724        if (mSamplingRates[i] == samplingRate) {
6725            return NO_ERROR;
6726        }
6727    }
6728    return BAD_VALUE;
6729}
6730
6731status_t AudioPolicyManager::AudioPort::checkCompatibleSamplingRate(uint32_t samplingRate,
6732        uint32_t *updatedSamplingRate) const
6733{
6734    if (mSamplingRates.isEmpty()) {
6735        return NO_ERROR;
6736    }
6737
6738    // Search for the closest supported sampling rate that is above (preferred)
6739    // or below (acceptable) the desired sampling rate, within a permitted ratio.
6740    // The sampling rates do not need to be sorted in ascending order.
6741    ssize_t maxBelow = -1;
6742    ssize_t minAbove = -1;
6743    uint32_t candidate;
6744    for (size_t i = 0; i < mSamplingRates.size(); i++) {
6745        candidate = mSamplingRates[i];
6746        if (candidate == samplingRate) {
6747            if (updatedSamplingRate != NULL) {
6748                *updatedSamplingRate = candidate;
6749            }
6750            return NO_ERROR;
6751        }
6752        // candidate < desired
6753        if (candidate < samplingRate) {
6754            if (maxBelow < 0 || candidate > mSamplingRates[maxBelow]) {
6755                maxBelow = i;
6756            }
6757        // candidate > desired
6758        } else {
6759            if (minAbove < 0 || candidate < mSamplingRates[minAbove]) {
6760                minAbove = i;
6761            }
6762        }
6763    }
6764    // This uses hard-coded knowledge about AudioFlinger resampling ratios.
6765    // TODO Move these assumptions out.
6766    static const uint32_t kMaxDownSampleRatio = 6;  // beyond this aliasing occurs
6767    static const uint32_t kMaxUpSampleRatio = 256;  // beyond this sample rate inaccuracies occur
6768                                                    // due to approximation by an int32_t of the
6769                                                    // phase increments
6770    // Prefer to down-sample from a higher sampling rate, as we get the desired frequency spectrum.
6771    if (minAbove >= 0) {
6772        candidate = mSamplingRates[minAbove];
6773        if (candidate / kMaxDownSampleRatio <= samplingRate) {
6774            if (updatedSamplingRate != NULL) {
6775                *updatedSamplingRate = candidate;
6776            }
6777            return NO_ERROR;
6778        }
6779    }
6780    // But if we have to up-sample from a lower sampling rate, that's OK.
6781    if (maxBelow >= 0) {
6782        candidate = mSamplingRates[maxBelow];
6783        if (candidate * kMaxUpSampleRatio >= samplingRate) {
6784            if (updatedSamplingRate != NULL) {
6785                *updatedSamplingRate = candidate;
6786            }
6787            return NO_ERROR;
6788        }
6789    }
6790    // leave updatedSamplingRate unmodified
6791    return BAD_VALUE;
6792}
6793
6794status_t AudioPolicyManager::AudioPort::checkExactChannelMask(audio_channel_mask_t channelMask) const
6795{
6796    if (mChannelMasks.isEmpty()) {
6797        return NO_ERROR;
6798    }
6799
6800    for (size_t i = 0; i < mChannelMasks.size(); i++) {
6801        if (mChannelMasks[i] == channelMask) {
6802            return NO_ERROR;
6803        }
6804    }
6805    return BAD_VALUE;
6806}
6807
6808status_t AudioPolicyManager::AudioPort::checkCompatibleChannelMask(audio_channel_mask_t channelMask)
6809        const
6810{
6811    if (mChannelMasks.isEmpty()) {
6812        return NO_ERROR;
6813    }
6814
6815    const bool isRecordThread = mType == AUDIO_PORT_TYPE_MIX && mRole == AUDIO_PORT_ROLE_SINK;
6816    for (size_t i = 0; i < mChannelMasks.size(); i ++) {
6817        // FIXME Does not handle multi-channel automatic conversions yet
6818        audio_channel_mask_t supported = mChannelMasks[i];
6819        if (supported == channelMask) {
6820            return NO_ERROR;
6821        }
6822        if (isRecordThread) {
6823            // This uses hard-coded knowledge that AudioFlinger can silently down-mix and up-mix.
6824            // FIXME Abstract this out to a table.
6825            if (((supported == AUDIO_CHANNEL_IN_FRONT_BACK || supported == AUDIO_CHANNEL_IN_STEREO)
6826                    && channelMask == AUDIO_CHANNEL_IN_MONO) ||
6827                (supported == AUDIO_CHANNEL_IN_MONO && (channelMask == AUDIO_CHANNEL_IN_FRONT_BACK
6828                    || channelMask == AUDIO_CHANNEL_IN_STEREO))) {
6829                return NO_ERROR;
6830            }
6831        }
6832    }
6833    return BAD_VALUE;
6834}
6835
6836status_t AudioPolicyManager::AudioPort::checkFormat(audio_format_t format) const
6837{
6838    if (mFormats.isEmpty()) {
6839        return NO_ERROR;
6840    }
6841
6842    for (size_t i = 0; i < mFormats.size(); i ++) {
6843        if (mFormats[i] == format) {
6844            return NO_ERROR;
6845        }
6846    }
6847    return BAD_VALUE;
6848}
6849
6850
6851uint32_t AudioPolicyManager::AudioPort::pickSamplingRate() const
6852{
6853    // special case for uninitialized dynamic profile
6854    if (mSamplingRates.size() == 1 && mSamplingRates[0] == 0) {
6855        return 0;
6856    }
6857
6858    // For direct outputs, pick minimum sampling rate: this helps ensuring that the
6859    // channel count / sampling rate combination chosen will be supported by the connected
6860    // sink
6861    if ((mType == AUDIO_PORT_TYPE_MIX) && (mRole == AUDIO_PORT_ROLE_SOURCE) &&
6862            (mFlags & (AUDIO_OUTPUT_FLAG_DIRECT | AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD))) {
6863        uint32_t samplingRate = UINT_MAX;
6864        for (size_t i = 0; i < mSamplingRates.size(); i ++) {
6865            if ((mSamplingRates[i] < samplingRate) && (mSamplingRates[i] > 0)) {
6866                samplingRate = mSamplingRates[i];
6867            }
6868        }
6869        return (samplingRate == UINT_MAX) ? 0 : samplingRate;
6870    }
6871
6872    uint32_t samplingRate = 0;
6873    uint32_t maxRate = MAX_MIXER_SAMPLING_RATE;
6874
6875    // For mixed output and inputs, use max mixer sampling rates. Do not
6876    // limit sampling rate otherwise
6877    if (mType != AUDIO_PORT_TYPE_MIX) {
6878        maxRate = UINT_MAX;
6879    }
6880    for (size_t i = 0; i < mSamplingRates.size(); i ++) {
6881        if ((mSamplingRates[i] > samplingRate) && (mSamplingRates[i] <= maxRate)) {
6882            samplingRate = mSamplingRates[i];
6883        }
6884    }
6885    return samplingRate;
6886}
6887
6888audio_channel_mask_t AudioPolicyManager::AudioPort::pickChannelMask() const
6889{
6890    // special case for uninitialized dynamic profile
6891    if (mChannelMasks.size() == 1 && mChannelMasks[0] == 0) {
6892        return AUDIO_CHANNEL_NONE;
6893    }
6894    audio_channel_mask_t channelMask = AUDIO_CHANNEL_NONE;
6895
6896    // For direct outputs, pick minimum channel count: this helps ensuring that the
6897    // channel count / sampling rate combination chosen will be supported by the connected
6898    // sink
6899    if ((mType == AUDIO_PORT_TYPE_MIX) && (mRole == AUDIO_PORT_ROLE_SOURCE) &&
6900            (mFlags & (AUDIO_OUTPUT_FLAG_DIRECT | AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD))) {
6901        uint32_t channelCount = UINT_MAX;
6902        for (size_t i = 0; i < mChannelMasks.size(); i ++) {
6903            uint32_t cnlCount;
6904            if (mUseInChannelMask) {
6905                cnlCount = audio_channel_count_from_in_mask(mChannelMasks[i]);
6906            } else {
6907                cnlCount = audio_channel_count_from_out_mask(mChannelMasks[i]);
6908            }
6909            if ((cnlCount < channelCount) && (cnlCount > 0)) {
6910                channelMask = mChannelMasks[i];
6911                channelCount = cnlCount;
6912            }
6913        }
6914        return channelMask;
6915    }
6916
6917    uint32_t channelCount = 0;
6918    uint32_t maxCount = MAX_MIXER_CHANNEL_COUNT;
6919
6920    // For mixed output and inputs, use max mixer channel count. Do not
6921    // limit channel count otherwise
6922    if (mType != AUDIO_PORT_TYPE_MIX) {
6923        maxCount = UINT_MAX;
6924    }
6925    for (size_t i = 0; i < mChannelMasks.size(); i ++) {
6926        uint32_t cnlCount;
6927        if (mUseInChannelMask) {
6928            cnlCount = audio_channel_count_from_in_mask(mChannelMasks[i]);
6929        } else {
6930            cnlCount = audio_channel_count_from_out_mask(mChannelMasks[i]);
6931        }
6932        if ((cnlCount > channelCount) && (cnlCount <= maxCount)) {
6933            channelMask = mChannelMasks[i];
6934            channelCount = cnlCount;
6935        }
6936    }
6937    return channelMask;
6938}
6939
6940/* format in order of increasing preference */
6941const audio_format_t AudioPolicyManager::AudioPort::sPcmFormatCompareTable[] = {
6942        AUDIO_FORMAT_DEFAULT,
6943        AUDIO_FORMAT_PCM_16_BIT,
6944        AUDIO_FORMAT_PCM_8_24_BIT,
6945        AUDIO_FORMAT_PCM_24_BIT_PACKED,
6946        AUDIO_FORMAT_PCM_32_BIT,
6947        AUDIO_FORMAT_PCM_FLOAT,
6948};
6949
6950int AudioPolicyManager::AudioPort::compareFormats(audio_format_t format1,
6951                                                  audio_format_t format2)
6952{
6953    // NOTE: AUDIO_FORMAT_INVALID is also considered not PCM and will be compared equal to any
6954    // compressed format and better than any PCM format. This is by design of pickFormat()
6955    if (!audio_is_linear_pcm(format1)) {
6956        if (!audio_is_linear_pcm(format2)) {
6957            return 0;
6958        }
6959        return 1;
6960    }
6961    if (!audio_is_linear_pcm(format2)) {
6962        return -1;
6963    }
6964
6965    int index1 = -1, index2 = -1;
6966    for (size_t i = 0;
6967            (i < ARRAY_SIZE(sPcmFormatCompareTable)) && ((index1 == -1) || (index2 == -1));
6968            i ++) {
6969        if (sPcmFormatCompareTable[i] == format1) {
6970            index1 = i;
6971        }
6972        if (sPcmFormatCompareTable[i] == format2) {
6973            index2 = i;
6974        }
6975    }
6976    // format1 not found => index1 < 0 => format2 > format1
6977    // format2 not found => index2 < 0 => format2 < format1
6978    return index1 - index2;
6979}
6980
6981audio_format_t AudioPolicyManager::AudioPort::pickFormat() const
6982{
6983    // special case for uninitialized dynamic profile
6984    if (mFormats.size() == 1 && mFormats[0] == 0) {
6985        return AUDIO_FORMAT_DEFAULT;
6986    }
6987
6988    audio_format_t format = AUDIO_FORMAT_DEFAULT;
6989    audio_format_t bestFormat =
6990            AudioPolicyManager::AudioPort::sPcmFormatCompareTable[
6991                ARRAY_SIZE(AudioPolicyManager::AudioPort::sPcmFormatCompareTable) - 1];
6992    // For mixed output and inputs, use best mixer output format. Do not
6993    // limit format otherwise
6994    if ((mType != AUDIO_PORT_TYPE_MIX) ||
6995            ((mRole == AUDIO_PORT_ROLE_SOURCE) &&
6996             (((mFlags & (AUDIO_OUTPUT_FLAG_DIRECT | AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD)) != 0)))) {
6997        bestFormat = AUDIO_FORMAT_INVALID;
6998    }
6999
7000    for (size_t i = 0; i < mFormats.size(); i ++) {
7001        if ((compareFormats(mFormats[i], format) > 0) &&
7002                (compareFormats(mFormats[i], bestFormat) <= 0)) {
7003            format = mFormats[i];
7004        }
7005    }
7006    return format;
7007}
7008
7009status_t AudioPolicyManager::AudioPort::checkGain(const struct audio_gain_config *gainConfig,
7010                                                  int index) const
7011{
7012    if (index < 0 || (size_t)index >= mGains.size()) {
7013        return BAD_VALUE;
7014    }
7015    return mGains[index]->checkConfig(gainConfig);
7016}
7017
7018void AudioPolicyManager::AudioPort::dump(int fd, int spaces) const
7019{
7020    const size_t SIZE = 256;
7021    char buffer[SIZE];
7022    String8 result;
7023
7024    if (mName.size() != 0) {
7025        snprintf(buffer, SIZE, "%*s- name: %s\n", spaces, "", mName.string());
7026        result.append(buffer);
7027    }
7028
7029    if (mSamplingRates.size() != 0) {
7030        snprintf(buffer, SIZE, "%*s- sampling rates: ", spaces, "");
7031        result.append(buffer);
7032        for (size_t i = 0; i < mSamplingRates.size(); i++) {
7033            if (i == 0 && mSamplingRates[i] == 0) {
7034                snprintf(buffer, SIZE, "Dynamic");
7035            } else {
7036                snprintf(buffer, SIZE, "%d", mSamplingRates[i]);
7037            }
7038            result.append(buffer);
7039            result.append(i == (mSamplingRates.size() - 1) ? "" : ", ");
7040        }
7041        result.append("\n");
7042    }
7043
7044    if (mChannelMasks.size() != 0) {
7045        snprintf(buffer, SIZE, "%*s- channel masks: ", spaces, "");
7046        result.append(buffer);
7047        for (size_t i = 0; i < mChannelMasks.size(); i++) {
7048            ALOGV("AudioPort::dump mChannelMasks %zu %08x", i, mChannelMasks[i]);
7049
7050            if (i == 0 && mChannelMasks[i] == 0) {
7051                snprintf(buffer, SIZE, "Dynamic");
7052            } else {
7053                snprintf(buffer, SIZE, "0x%04x", mChannelMasks[i]);
7054            }
7055            result.append(buffer);
7056            result.append(i == (mChannelMasks.size() - 1) ? "" : ", ");
7057        }
7058        result.append("\n");
7059    }
7060
7061    if (mFormats.size() != 0) {
7062        snprintf(buffer, SIZE, "%*s- formats: ", spaces, "");
7063        result.append(buffer);
7064        for (size_t i = 0; i < mFormats.size(); i++) {
7065            const char *formatStr = enumToString(sFormatNameToEnumTable,
7066                                                 ARRAY_SIZE(sFormatNameToEnumTable),
7067                                                 mFormats[i]);
7068            if (i == 0 && strcmp(formatStr, "") == 0) {
7069                snprintf(buffer, SIZE, "Dynamic");
7070            } else {
7071                snprintf(buffer, SIZE, "%s", formatStr);
7072            }
7073            result.append(buffer);
7074            result.append(i == (mFormats.size() - 1) ? "" : ", ");
7075        }
7076        result.append("\n");
7077    }
7078    write(fd, result.string(), result.size());
7079    if (mGains.size() != 0) {
7080        snprintf(buffer, SIZE, "%*s- gains:\n", spaces, "");
7081        write(fd, buffer, strlen(buffer) + 1);
7082        result.append(buffer);
7083        for (size_t i = 0; i < mGains.size(); i++) {
7084            mGains[i]->dump(fd, spaces + 2, i);
7085        }
7086    }
7087}
7088
7089// --- AudioGain class implementation
7090
7091AudioPolicyManager::AudioGain::AudioGain(int index, bool useInChannelMask)
7092{
7093    mIndex = index;
7094    mUseInChannelMask = useInChannelMask;
7095    memset(&mGain, 0, sizeof(struct audio_gain));
7096}
7097
7098void AudioPolicyManager::AudioGain::getDefaultConfig(struct audio_gain_config *config)
7099{
7100    config->index = mIndex;
7101    config->mode = mGain.mode;
7102    config->channel_mask = mGain.channel_mask;
7103    if ((mGain.mode & AUDIO_GAIN_MODE_JOINT) == AUDIO_GAIN_MODE_JOINT) {
7104        config->values[0] = mGain.default_value;
7105    } else {
7106        uint32_t numValues;
7107        if (mUseInChannelMask) {
7108            numValues = audio_channel_count_from_in_mask(mGain.channel_mask);
7109        } else {
7110            numValues = audio_channel_count_from_out_mask(mGain.channel_mask);
7111        }
7112        for (size_t i = 0; i < numValues; i++) {
7113            config->values[i] = mGain.default_value;
7114        }
7115    }
7116    if ((mGain.mode & AUDIO_GAIN_MODE_RAMP) == AUDIO_GAIN_MODE_RAMP) {
7117        config->ramp_duration_ms = mGain.min_ramp_ms;
7118    }
7119}
7120
7121status_t AudioPolicyManager::AudioGain::checkConfig(const struct audio_gain_config *config)
7122{
7123    if ((config->mode & ~mGain.mode) != 0) {
7124        return BAD_VALUE;
7125    }
7126    if ((config->mode & AUDIO_GAIN_MODE_JOINT) == AUDIO_GAIN_MODE_JOINT) {
7127        if ((config->values[0] < mGain.min_value) ||
7128                    (config->values[0] > mGain.max_value)) {
7129            return BAD_VALUE;
7130        }
7131    } else {
7132        if ((config->channel_mask & ~mGain.channel_mask) != 0) {
7133            return BAD_VALUE;
7134        }
7135        uint32_t numValues;
7136        if (mUseInChannelMask) {
7137            numValues = audio_channel_count_from_in_mask(config->channel_mask);
7138        } else {
7139            numValues = audio_channel_count_from_out_mask(config->channel_mask);
7140        }
7141        for (size_t i = 0; i < numValues; i++) {
7142            if ((config->values[i] < mGain.min_value) ||
7143                    (config->values[i] > mGain.max_value)) {
7144                return BAD_VALUE;
7145            }
7146        }
7147    }
7148    if ((config->mode & AUDIO_GAIN_MODE_RAMP) == AUDIO_GAIN_MODE_RAMP) {
7149        if ((config->ramp_duration_ms < mGain.min_ramp_ms) ||
7150                    (config->ramp_duration_ms > mGain.max_ramp_ms)) {
7151            return BAD_VALUE;
7152        }
7153    }
7154    return NO_ERROR;
7155}
7156
7157void AudioPolicyManager::AudioGain::dump(int fd, int spaces, int index) const
7158{
7159    const size_t SIZE = 256;
7160    char buffer[SIZE];
7161    String8 result;
7162
7163    snprintf(buffer, SIZE, "%*sGain %d:\n", spaces, "", index+1);
7164    result.append(buffer);
7165    snprintf(buffer, SIZE, "%*s- mode: %08x\n", spaces, "", mGain.mode);
7166    result.append(buffer);
7167    snprintf(buffer, SIZE, "%*s- channel_mask: %08x\n", spaces, "", mGain.channel_mask);
7168    result.append(buffer);
7169    snprintf(buffer, SIZE, "%*s- min_value: %d mB\n", spaces, "", mGain.min_value);
7170    result.append(buffer);
7171    snprintf(buffer, SIZE, "%*s- max_value: %d mB\n", spaces, "", mGain.max_value);
7172    result.append(buffer);
7173    snprintf(buffer, SIZE, "%*s- default_value: %d mB\n", spaces, "", mGain.default_value);
7174    result.append(buffer);
7175    snprintf(buffer, SIZE, "%*s- step_value: %d mB\n", spaces, "", mGain.step_value);
7176    result.append(buffer);
7177    snprintf(buffer, SIZE, "%*s- min_ramp_ms: %d ms\n", spaces, "", mGain.min_ramp_ms);
7178    result.append(buffer);
7179    snprintf(buffer, SIZE, "%*s- max_ramp_ms: %d ms\n", spaces, "", mGain.max_ramp_ms);
7180    result.append(buffer);
7181
7182    write(fd, result.string(), result.size());
7183}
7184
7185// --- AudioPortConfig class implementation
7186
7187AudioPolicyManager::AudioPortConfig::AudioPortConfig()
7188{
7189    mSamplingRate = 0;
7190    mChannelMask = AUDIO_CHANNEL_NONE;
7191    mFormat = AUDIO_FORMAT_INVALID;
7192    mGain.index = -1;
7193}
7194
7195status_t AudioPolicyManager::AudioPortConfig::applyAudioPortConfig(
7196                                                        const struct audio_port_config *config,
7197                                                        struct audio_port_config *backupConfig)
7198{
7199    struct audio_port_config localBackupConfig;
7200    status_t status = NO_ERROR;
7201
7202    localBackupConfig.config_mask = config->config_mask;
7203    toAudioPortConfig(&localBackupConfig);
7204
7205    sp<AudioPort> audioport = getAudioPort();
7206    if (audioport == 0) {
7207        status = NO_INIT;
7208        goto exit;
7209    }
7210    if (config->config_mask & AUDIO_PORT_CONFIG_SAMPLE_RATE) {
7211        status = audioport->checkExactSamplingRate(config->sample_rate);
7212        if (status != NO_ERROR) {
7213            goto exit;
7214        }
7215        mSamplingRate = config->sample_rate;
7216    }
7217    if (config->config_mask & AUDIO_PORT_CONFIG_CHANNEL_MASK) {
7218        status = audioport->checkExactChannelMask(config->channel_mask);
7219        if (status != NO_ERROR) {
7220            goto exit;
7221        }
7222        mChannelMask = config->channel_mask;
7223    }
7224    if (config->config_mask & AUDIO_PORT_CONFIG_FORMAT) {
7225        status = audioport->checkFormat(config->format);
7226        if (status != NO_ERROR) {
7227            goto exit;
7228        }
7229        mFormat = config->format;
7230    }
7231    if (config->config_mask & AUDIO_PORT_CONFIG_GAIN) {
7232        status = audioport->checkGain(&config->gain, config->gain.index);
7233        if (status != NO_ERROR) {
7234            goto exit;
7235        }
7236        mGain = config->gain;
7237    }
7238
7239exit:
7240    if (status != NO_ERROR) {
7241        applyAudioPortConfig(&localBackupConfig);
7242    }
7243    if (backupConfig != NULL) {
7244        *backupConfig = localBackupConfig;
7245    }
7246    return status;
7247}
7248
7249void AudioPolicyManager::AudioPortConfig::toAudioPortConfig(
7250                                                    struct audio_port_config *dstConfig,
7251                                                    const struct audio_port_config *srcConfig) const
7252{
7253    if (dstConfig->config_mask & AUDIO_PORT_CONFIG_SAMPLE_RATE) {
7254        dstConfig->sample_rate = mSamplingRate;
7255        if ((srcConfig != NULL) && (srcConfig->config_mask & AUDIO_PORT_CONFIG_SAMPLE_RATE)) {
7256            dstConfig->sample_rate = srcConfig->sample_rate;
7257        }
7258    } else {
7259        dstConfig->sample_rate = 0;
7260    }
7261    if (dstConfig->config_mask & AUDIO_PORT_CONFIG_CHANNEL_MASK) {
7262        dstConfig->channel_mask = mChannelMask;
7263        if ((srcConfig != NULL) && (srcConfig->config_mask & AUDIO_PORT_CONFIG_CHANNEL_MASK)) {
7264            dstConfig->channel_mask = srcConfig->channel_mask;
7265        }
7266    } else {
7267        dstConfig->channel_mask = AUDIO_CHANNEL_NONE;
7268    }
7269    if (dstConfig->config_mask & AUDIO_PORT_CONFIG_FORMAT) {
7270        dstConfig->format = mFormat;
7271        if ((srcConfig != NULL) && (srcConfig->config_mask & AUDIO_PORT_CONFIG_FORMAT)) {
7272            dstConfig->format = srcConfig->format;
7273        }
7274    } else {
7275        dstConfig->format = AUDIO_FORMAT_INVALID;
7276    }
7277    if (dstConfig->config_mask & AUDIO_PORT_CONFIG_GAIN) {
7278        dstConfig->gain = mGain;
7279        if ((srcConfig != NULL) && (srcConfig->config_mask & AUDIO_PORT_CONFIG_GAIN)) {
7280            dstConfig->gain = srcConfig->gain;
7281        }
7282    } else {
7283        dstConfig->gain.index = -1;
7284    }
7285    if (dstConfig->gain.index != -1) {
7286        dstConfig->config_mask |= AUDIO_PORT_CONFIG_GAIN;
7287    } else {
7288        dstConfig->config_mask &= ~AUDIO_PORT_CONFIG_GAIN;
7289    }
7290}
7291
7292// --- IOProfile class implementation
7293
7294AudioPolicyManager::IOProfile::IOProfile(const String8& name, audio_port_role_t role,
7295                                         const sp<HwModule>& module)
7296    : AudioPort(name, AUDIO_PORT_TYPE_MIX, role, module)
7297{
7298}
7299
7300AudioPolicyManager::IOProfile::~IOProfile()
7301{
7302}
7303
7304// checks if the IO profile is compatible with specified parameters.
7305// Sampling rate, format and channel mask must be specified in order to
7306// get a valid a match
7307bool AudioPolicyManager::IOProfile::isCompatibleProfile(audio_devices_t device,
7308                                                        String8 address,
7309                                                        uint32_t samplingRate,
7310                                                        uint32_t *updatedSamplingRate,
7311                                                        audio_format_t format,
7312                                                        audio_channel_mask_t channelMask,
7313                                                        uint32_t flags) const
7314{
7315    const bool isPlaybackThread = mType == AUDIO_PORT_TYPE_MIX && mRole == AUDIO_PORT_ROLE_SOURCE;
7316    const bool isRecordThread = mType == AUDIO_PORT_TYPE_MIX && mRole == AUDIO_PORT_ROLE_SINK;
7317    ALOG_ASSERT(isPlaybackThread != isRecordThread);
7318
7319    if (device != AUDIO_DEVICE_NONE && mSupportedDevices.getDevice(device, address) == 0) {
7320        return false;
7321    }
7322
7323    if (samplingRate == 0) {
7324         return false;
7325    }
7326    uint32_t myUpdatedSamplingRate = samplingRate;
7327    if (isPlaybackThread && checkExactSamplingRate(samplingRate) != NO_ERROR) {
7328         return false;
7329    }
7330    if (isRecordThread && checkCompatibleSamplingRate(samplingRate, &myUpdatedSamplingRate) !=
7331            NO_ERROR) {
7332         return false;
7333    }
7334
7335    if (!audio_is_valid_format(format) || checkFormat(format) != NO_ERROR) {
7336        return false;
7337    }
7338
7339    if (isPlaybackThread && (!audio_is_output_channel(channelMask) ||
7340            checkExactChannelMask(channelMask) != NO_ERROR)) {
7341        return false;
7342    }
7343    if (isRecordThread && (!audio_is_input_channel(channelMask) ||
7344            checkCompatibleChannelMask(channelMask) != NO_ERROR)) {
7345        return false;
7346    }
7347
7348    if (isPlaybackThread && (mFlags & flags) != flags) {
7349        return false;
7350    }
7351    // The only input flag that is allowed to be different is the fast flag.
7352    // An existing fast stream is compatible with a normal track request.
7353    // An existing normal stream is compatible with a fast track request,
7354    // but the fast request will be denied by AudioFlinger and converted to normal track.
7355    if (isRecordThread && ((mFlags ^ flags) &
7356            ~AUDIO_INPUT_FLAG_FAST)) {
7357        return false;
7358    }
7359
7360    if (updatedSamplingRate != NULL) {
7361        *updatedSamplingRate = myUpdatedSamplingRate;
7362    }
7363    return true;
7364}
7365
7366void AudioPolicyManager::IOProfile::dump(int fd)
7367{
7368    const size_t SIZE = 256;
7369    char buffer[SIZE];
7370    String8 result;
7371
7372    AudioPort::dump(fd, 4);
7373
7374    snprintf(buffer, SIZE, "    - flags: 0x%04x\n", mFlags);
7375    result.append(buffer);
7376    snprintf(buffer, SIZE, "    - devices:\n");
7377    result.append(buffer);
7378    write(fd, result.string(), result.size());
7379    for (size_t i = 0; i < mSupportedDevices.size(); i++) {
7380        mSupportedDevices[i]->dump(fd, 6, i);
7381    }
7382}
7383
7384void AudioPolicyManager::IOProfile::log()
7385{
7386    const size_t SIZE = 256;
7387    char buffer[SIZE];
7388    String8 result;
7389
7390    ALOGV("    - sampling rates: ");
7391    for (size_t i = 0; i < mSamplingRates.size(); i++) {
7392        ALOGV("  %d", mSamplingRates[i]);
7393    }
7394
7395    ALOGV("    - channel masks: ");
7396    for (size_t i = 0; i < mChannelMasks.size(); i++) {
7397        ALOGV("  0x%04x", mChannelMasks[i]);
7398    }
7399
7400    ALOGV("    - formats: ");
7401    for (size_t i = 0; i < mFormats.size(); i++) {
7402        ALOGV("  0x%08x", mFormats[i]);
7403    }
7404
7405    ALOGV("    - devices: 0x%04x\n", mSupportedDevices.types());
7406    ALOGV("    - flags: 0x%04x\n", mFlags);
7407}
7408
7409
7410// --- DeviceDescriptor implementation
7411
7412
7413AudioPolicyManager::DeviceDescriptor::DeviceDescriptor(const String8& name, audio_devices_t type) :
7414                     AudioPort(name, AUDIO_PORT_TYPE_DEVICE,
7415                               audio_is_output_device(type) ? AUDIO_PORT_ROLE_SINK :
7416                                                              AUDIO_PORT_ROLE_SOURCE,
7417                             NULL),
7418                     mDeviceType(type), mAddress(""), mId(0)
7419{
7420    if (mGains.size() > 0) {
7421        mGains[0]->getDefaultConfig(&mGain);
7422    }
7423}
7424
7425bool AudioPolicyManager::DeviceDescriptor::equals(const sp<DeviceDescriptor>& other) const
7426{
7427    // Devices are considered equal if they:
7428    // - are of the same type (a device type cannot be AUDIO_DEVICE_NONE)
7429    // - have the same address or one device does not specify the address
7430    // - have the same channel mask or one device does not specify the channel mask
7431    return (mDeviceType == other->mDeviceType) &&
7432           (mAddress == "" || other->mAddress == "" || mAddress == other->mAddress) &&
7433           (mChannelMask == 0 || other->mChannelMask == 0 ||
7434                mChannelMask == other->mChannelMask);
7435}
7436
7437void AudioPolicyManager::DeviceVector::refreshTypes()
7438{
7439    mDeviceTypes = AUDIO_DEVICE_NONE;
7440    for(size_t i = 0; i < size(); i++) {
7441        mDeviceTypes |= itemAt(i)->mDeviceType;
7442    }
7443    ALOGV("DeviceVector::refreshTypes() mDeviceTypes %08x", mDeviceTypes);
7444}
7445
7446ssize_t AudioPolicyManager::DeviceVector::indexOf(const sp<DeviceDescriptor>& item) const
7447{
7448    for(size_t i = 0; i < size(); i++) {
7449        if (item->equals(itemAt(i))) {
7450            return i;
7451        }
7452    }
7453    return -1;
7454}
7455
7456ssize_t AudioPolicyManager::DeviceVector::add(const sp<DeviceDescriptor>& item)
7457{
7458    ssize_t ret = indexOf(item);
7459
7460    if (ret < 0) {
7461        ret = SortedVector::add(item);
7462        if (ret >= 0) {
7463            refreshTypes();
7464        }
7465    } else {
7466        ALOGW("DeviceVector::add device %08x already in", item->mDeviceType);
7467        ret = -1;
7468    }
7469    return ret;
7470}
7471
7472ssize_t AudioPolicyManager::DeviceVector::remove(const sp<DeviceDescriptor>& item)
7473{
7474    size_t i;
7475    ssize_t ret = indexOf(item);
7476
7477    if (ret < 0) {
7478        ALOGW("DeviceVector::remove device %08x not in", item->mDeviceType);
7479    } else {
7480        ret = SortedVector::removeAt(ret);
7481        if (ret >= 0) {
7482            refreshTypes();
7483        }
7484    }
7485    return ret;
7486}
7487
7488void AudioPolicyManager::DeviceVector::loadDevicesFromType(audio_devices_t types)
7489{
7490    DeviceVector deviceList;
7491
7492    uint32_t role_bit = AUDIO_DEVICE_BIT_IN & types;
7493    types &= ~role_bit;
7494
7495    while (types) {
7496        uint32_t i = 31 - __builtin_clz(types);
7497        uint32_t type = 1 << i;
7498        types &= ~type;
7499        add(new DeviceDescriptor(String8(""), type | role_bit));
7500    }
7501}
7502
7503void AudioPolicyManager::DeviceVector::loadDevicesFromName(char *name,
7504                                                           const DeviceVector& declaredDevices)
7505{
7506    char *devName = strtok(name, "|");
7507    while (devName != NULL) {
7508        if (strlen(devName) != 0) {
7509            audio_devices_t type = stringToEnum(sDeviceNameToEnumTable,
7510                                 ARRAY_SIZE(sDeviceNameToEnumTable),
7511                                 devName);
7512            if (type != AUDIO_DEVICE_NONE) {
7513                sp<DeviceDescriptor> dev = new DeviceDescriptor(String8(""), type);
7514                if (type == AUDIO_DEVICE_IN_REMOTE_SUBMIX ||
7515                        type == AUDIO_DEVICE_OUT_REMOTE_SUBMIX ) {
7516                    dev->mAddress = String8("0");
7517                }
7518                add(dev);
7519            } else {
7520                sp<DeviceDescriptor> deviceDesc =
7521                        declaredDevices.getDeviceFromName(String8(devName));
7522                if (deviceDesc != 0) {
7523                    add(deviceDesc);
7524                }
7525            }
7526         }
7527         devName = strtok(NULL, "|");
7528     }
7529}
7530
7531sp<AudioPolicyManager::DeviceDescriptor> AudioPolicyManager::DeviceVector::getDevice(
7532                                                        audio_devices_t type, String8 address) const
7533{
7534    sp<DeviceDescriptor> device;
7535    for (size_t i = 0; i < size(); i++) {
7536        if (itemAt(i)->mDeviceType == type) {
7537            if (address == "" || itemAt(i)->mAddress == address) {
7538                device = itemAt(i);
7539                if (itemAt(i)->mAddress == address) {
7540                    break;
7541                }
7542            }
7543        }
7544    }
7545    ALOGV("DeviceVector::getDevice() for type %08x address %s found %p",
7546          type, address.string(), device.get());
7547    return device;
7548}
7549
7550sp<AudioPolicyManager::DeviceDescriptor> AudioPolicyManager::DeviceVector::getDeviceFromId(
7551                                                                    audio_port_handle_t id) const
7552{
7553    sp<DeviceDescriptor> device;
7554    for (size_t i = 0; i < size(); i++) {
7555        ALOGV("DeviceVector::getDeviceFromId(%d) itemAt(%zu)->mId %d", id, i, itemAt(i)->mId);
7556        if (itemAt(i)->mId == id) {
7557            device = itemAt(i);
7558            break;
7559        }
7560    }
7561    return device;
7562}
7563
7564AudioPolicyManager::DeviceVector AudioPolicyManager::DeviceVector::getDevicesFromType(
7565                                                                        audio_devices_t type) const
7566{
7567    DeviceVector devices;
7568    for (size_t i = 0; (i < size()) && (type != AUDIO_DEVICE_NONE); i++) {
7569        if (itemAt(i)->mDeviceType & type & ~AUDIO_DEVICE_BIT_IN) {
7570            devices.add(itemAt(i));
7571            type &= ~itemAt(i)->mDeviceType;
7572            ALOGV("DeviceVector::getDevicesFromType() for type %x found %p",
7573                  itemAt(i)->mDeviceType, itemAt(i).get());
7574        }
7575    }
7576    return devices;
7577}
7578
7579AudioPolicyManager::DeviceVector AudioPolicyManager::DeviceVector::getDevicesFromTypeAddr(
7580        audio_devices_t type, String8 address) const
7581{
7582    DeviceVector devices;
7583    for (size_t i = 0; i < size(); i++) {
7584        if (itemAt(i)->mDeviceType == type) {
7585            if (itemAt(i)->mAddress == address) {
7586                devices.add(itemAt(i));
7587            }
7588        }
7589    }
7590    return devices;
7591}
7592
7593sp<AudioPolicyManager::DeviceDescriptor> AudioPolicyManager::DeviceVector::getDeviceFromName(
7594        const String8& name) const
7595{
7596    sp<DeviceDescriptor> device;
7597    for (size_t i = 0; i < size(); i++) {
7598        if (itemAt(i)->mName == name) {
7599            device = itemAt(i);
7600            break;
7601        }
7602    }
7603    return device;
7604}
7605
7606void AudioPolicyManager::DeviceDescriptor::toAudioPortConfig(
7607                                                    struct audio_port_config *dstConfig,
7608                                                    const struct audio_port_config *srcConfig) const
7609{
7610    dstConfig->config_mask = AUDIO_PORT_CONFIG_CHANNEL_MASK|AUDIO_PORT_CONFIG_GAIN;
7611    if (srcConfig != NULL) {
7612        dstConfig->config_mask |= srcConfig->config_mask;
7613    }
7614
7615    AudioPortConfig::toAudioPortConfig(dstConfig, srcConfig);
7616
7617    dstConfig->id = mId;
7618    dstConfig->role = audio_is_output_device(mDeviceType) ?
7619                        AUDIO_PORT_ROLE_SINK : AUDIO_PORT_ROLE_SOURCE;
7620    dstConfig->type = AUDIO_PORT_TYPE_DEVICE;
7621    dstConfig->ext.device.type = mDeviceType;
7622    dstConfig->ext.device.hw_module = mModule->mHandle;
7623    strncpy(dstConfig->ext.device.address, mAddress.string(), AUDIO_DEVICE_MAX_ADDRESS_LEN);
7624}
7625
7626void AudioPolicyManager::DeviceDescriptor::toAudioPort(struct audio_port *port) const
7627{
7628    ALOGV("DeviceDescriptor::toAudioPort() handle %d type %x", mId, mDeviceType);
7629    AudioPort::toAudioPort(port);
7630    port->id = mId;
7631    toAudioPortConfig(&port->active_config);
7632    port->ext.device.type = mDeviceType;
7633    port->ext.device.hw_module = mModule->mHandle;
7634    strncpy(port->ext.device.address, mAddress.string(), AUDIO_DEVICE_MAX_ADDRESS_LEN);
7635}
7636
7637status_t AudioPolicyManager::DeviceDescriptor::dump(int fd, int spaces, int index) const
7638{
7639    const size_t SIZE = 256;
7640    char buffer[SIZE];
7641    String8 result;
7642
7643    snprintf(buffer, SIZE, "%*sDevice %d:\n", spaces, "", index+1);
7644    result.append(buffer);
7645    if (mId != 0) {
7646        snprintf(buffer, SIZE, "%*s- id: %2d\n", spaces, "", mId);
7647        result.append(buffer);
7648    }
7649    snprintf(buffer, SIZE, "%*s- type: %-48s\n", spaces, "",
7650                                              enumToString(sDeviceNameToEnumTable,
7651                                                           ARRAY_SIZE(sDeviceNameToEnumTable),
7652                                                           mDeviceType));
7653    result.append(buffer);
7654    if (mAddress.size() != 0) {
7655        snprintf(buffer, SIZE, "%*s- address: %-32s\n", spaces, "", mAddress.string());
7656        result.append(buffer);
7657    }
7658    write(fd, result.string(), result.size());
7659    AudioPort::dump(fd, spaces);
7660
7661    return NO_ERROR;
7662}
7663
7664status_t AudioPolicyManager::AudioPatch::dump(int fd, int spaces, int index) const
7665{
7666    const size_t SIZE = 256;
7667    char buffer[SIZE];
7668    String8 result;
7669
7670
7671    snprintf(buffer, SIZE, "%*sAudio patch %d:\n", spaces, "", index+1);
7672    result.append(buffer);
7673    snprintf(buffer, SIZE, "%*s- handle: %2d\n", spaces, "", mHandle);
7674    result.append(buffer);
7675    snprintf(buffer, SIZE, "%*s- audio flinger handle: %2d\n", spaces, "", mAfPatchHandle);
7676    result.append(buffer);
7677    snprintf(buffer, SIZE, "%*s- owner uid: %2d\n", spaces, "", mUid);
7678    result.append(buffer);
7679    snprintf(buffer, SIZE, "%*s- %d sources:\n", spaces, "", mPatch.num_sources);
7680    result.append(buffer);
7681    for (size_t i = 0; i < mPatch.num_sources; i++) {
7682        if (mPatch.sources[i].type == AUDIO_PORT_TYPE_DEVICE) {
7683            snprintf(buffer, SIZE, "%*s- Device ID %d %s\n", spaces + 2, "",
7684                     mPatch.sources[i].id, enumToString(sDeviceNameToEnumTable,
7685                                                        ARRAY_SIZE(sDeviceNameToEnumTable),
7686                                                        mPatch.sources[i].ext.device.type));
7687        } else {
7688            snprintf(buffer, SIZE, "%*s- Mix ID %d I/O handle %d\n", spaces + 2, "",
7689                     mPatch.sources[i].id, mPatch.sources[i].ext.mix.handle);
7690        }
7691        result.append(buffer);
7692    }
7693    snprintf(buffer, SIZE, "%*s- %d sinks:\n", spaces, "", mPatch.num_sinks);
7694    result.append(buffer);
7695    for (size_t i = 0; i < mPatch.num_sinks; i++) {
7696        if (mPatch.sinks[i].type == AUDIO_PORT_TYPE_DEVICE) {
7697            snprintf(buffer, SIZE, "%*s- Device ID %d %s\n", spaces + 2, "",
7698                     mPatch.sinks[i].id, enumToString(sDeviceNameToEnumTable,
7699                                                        ARRAY_SIZE(sDeviceNameToEnumTable),
7700                                                        mPatch.sinks[i].ext.device.type));
7701        } else {
7702            snprintf(buffer, SIZE, "%*s- Mix ID %d I/O handle %d\n", spaces + 2, "",
7703                     mPatch.sinks[i].id, mPatch.sinks[i].ext.mix.handle);
7704        }
7705        result.append(buffer);
7706    }
7707
7708    write(fd, result.string(), result.size());
7709    return NO_ERROR;
7710}
7711
7712// --- audio_policy.conf file parsing
7713
7714uint32_t AudioPolicyManager::parseOutputFlagNames(char *name)
7715{
7716    uint32_t flag = 0;
7717
7718    // it is OK to cast name to non const here as we are not going to use it after
7719    // strtok() modifies it
7720    char *flagName = strtok(name, "|");
7721    while (flagName != NULL) {
7722        if (strlen(flagName) != 0) {
7723            flag |= stringToEnum(sOutputFlagNameToEnumTable,
7724                               ARRAY_SIZE(sOutputFlagNameToEnumTable),
7725                               flagName);
7726        }
7727        flagName = strtok(NULL, "|");
7728    }
7729    //force direct flag if offload flag is set: offloading implies a direct output stream
7730    // and all common behaviors are driven by checking only the direct flag
7731    // this should normally be set appropriately in the policy configuration file
7732    if ((flag & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) != 0) {
7733        flag |= AUDIO_OUTPUT_FLAG_DIRECT;
7734    }
7735
7736    return flag;
7737}
7738
7739uint32_t AudioPolicyManager::parseInputFlagNames(char *name)
7740{
7741    uint32_t flag = 0;
7742
7743    // it is OK to cast name to non const here as we are not going to use it after
7744    // strtok() modifies it
7745    char *flagName = strtok(name, "|");
7746    while (flagName != NULL) {
7747        if (strlen(flagName) != 0) {
7748            flag |= stringToEnum(sInputFlagNameToEnumTable,
7749                               ARRAY_SIZE(sInputFlagNameToEnumTable),
7750                               flagName);
7751        }
7752        flagName = strtok(NULL, "|");
7753    }
7754    return flag;
7755}
7756
7757audio_devices_t AudioPolicyManager::parseDeviceNames(char *name)
7758{
7759    uint32_t device = 0;
7760
7761    char *devName = strtok(name, "|");
7762    while (devName != NULL) {
7763        if (strlen(devName) != 0) {
7764            device |= stringToEnum(sDeviceNameToEnumTable,
7765                                 ARRAY_SIZE(sDeviceNameToEnumTable),
7766                                 devName);
7767         }
7768        devName = strtok(NULL, "|");
7769     }
7770    return device;
7771}
7772
7773void AudioPolicyManager::loadHwModule(cnode *root)
7774{
7775    status_t status = NAME_NOT_FOUND;
7776    cnode *node;
7777    sp<HwModule> module = new HwModule(root->name);
7778
7779    node = config_find(root, DEVICES_TAG);
7780    if (node != NULL) {
7781        node = node->first_child;
7782        while (node) {
7783            ALOGV("loadHwModule() loading device %s", node->name);
7784            status_t tmpStatus = module->loadDevice(node);
7785            if (status == NAME_NOT_FOUND || status == NO_ERROR) {
7786                status = tmpStatus;
7787            }
7788            node = node->next;
7789        }
7790    }
7791    node = config_find(root, OUTPUTS_TAG);
7792    if (node != NULL) {
7793        node = node->first_child;
7794        while (node) {
7795            ALOGV("loadHwModule() loading output %s", node->name);
7796            status_t tmpStatus = module->loadOutput(node);
7797            if (status == NAME_NOT_FOUND || status == NO_ERROR) {
7798                status = tmpStatus;
7799            }
7800            node = node->next;
7801        }
7802    }
7803    node = config_find(root, INPUTS_TAG);
7804    if (node != NULL) {
7805        node = node->first_child;
7806        while (node) {
7807            ALOGV("loadHwModule() loading input %s", node->name);
7808            status_t tmpStatus = module->loadInput(node);
7809            if (status == NAME_NOT_FOUND || status == NO_ERROR) {
7810                status = tmpStatus;
7811            }
7812            node = node->next;
7813        }
7814    }
7815    loadGlobalConfig(root, module);
7816
7817    if (status == NO_ERROR) {
7818        mHwModules.add(module);
7819    }
7820}
7821
7822void AudioPolicyManager::loadHwModules(cnode *root)
7823{
7824    cnode *node = config_find(root, AUDIO_HW_MODULE_TAG);
7825    if (node == NULL) {
7826        return;
7827    }
7828
7829    node = node->first_child;
7830    while (node) {
7831        ALOGV("loadHwModules() loading module %s", node->name);
7832        loadHwModule(node);
7833        node = node->next;
7834    }
7835}
7836
7837void AudioPolicyManager::loadGlobalConfig(cnode *root, const sp<HwModule>& module)
7838{
7839    cnode *node = config_find(root, GLOBAL_CONFIG_TAG);
7840
7841    if (node == NULL) {
7842        return;
7843    }
7844    DeviceVector declaredDevices;
7845    if (module != NULL) {
7846        declaredDevices = module->mDeclaredDevices;
7847    }
7848
7849    node = node->first_child;
7850    while (node) {
7851        if (strcmp(ATTACHED_OUTPUT_DEVICES_TAG, node->name) == 0) {
7852            mAvailableOutputDevices.loadDevicesFromName((char *)node->value,
7853                                                        declaredDevices);
7854            ALOGV("loadGlobalConfig() Attached Output Devices %08x",
7855                  mAvailableOutputDevices.types());
7856        } else if (strcmp(DEFAULT_OUTPUT_DEVICE_TAG, node->name) == 0) {
7857            audio_devices_t device = (audio_devices_t)stringToEnum(sDeviceNameToEnumTable,
7858                                              ARRAY_SIZE(sDeviceNameToEnumTable),
7859                                              (char *)node->value);
7860            if (device != AUDIO_DEVICE_NONE) {
7861                mDefaultOutputDevice = new DeviceDescriptor(String8(""), device);
7862            } else {
7863                ALOGW("loadGlobalConfig() default device not specified");
7864            }
7865            ALOGV("loadGlobalConfig() mDefaultOutputDevice %08x", mDefaultOutputDevice->mDeviceType);
7866        } else if (strcmp(ATTACHED_INPUT_DEVICES_TAG, node->name) == 0) {
7867            mAvailableInputDevices.loadDevicesFromName((char *)node->value,
7868                                                       declaredDevices);
7869            ALOGV("loadGlobalConfig() Available InputDevices %08x", mAvailableInputDevices.types());
7870        } else if (strcmp(SPEAKER_DRC_ENABLED_TAG, node->name) == 0) {
7871            mSpeakerDrcEnabled = stringToBool((char *)node->value);
7872            ALOGV("loadGlobalConfig() mSpeakerDrcEnabled = %d", mSpeakerDrcEnabled);
7873        } else if (strcmp(AUDIO_HAL_VERSION_TAG, node->name) == 0) {
7874            uint32_t major, minor;
7875            sscanf((char *)node->value, "%u.%u", &major, &minor);
7876            module->mHalVersion = HARDWARE_DEVICE_API_VERSION(major, minor);
7877            ALOGV("loadGlobalConfig() mHalVersion = %04x major %u minor %u",
7878                  module->mHalVersion, major, minor);
7879        }
7880        node = node->next;
7881    }
7882}
7883
7884status_t AudioPolicyManager::loadAudioPolicyConfig(const char *path)
7885{
7886    cnode *root;
7887    char *data;
7888
7889    data = (char *)load_file(path, NULL);
7890    if (data == NULL) {
7891        return -ENODEV;
7892    }
7893    root = config_node("", "");
7894    config_load(root, data);
7895
7896    loadHwModules(root);
7897    // legacy audio_policy.conf files have one global_configuration section
7898    loadGlobalConfig(root, getModuleFromName(AUDIO_HARDWARE_MODULE_ID_PRIMARY));
7899    config_free(root);
7900    free(root);
7901    free(data);
7902
7903    ALOGI("loadAudioPolicyConfig() loaded %s\n", path);
7904
7905    return NO_ERROR;
7906}
7907
7908void AudioPolicyManager::defaultAudioPolicyConfig(void)
7909{
7910    sp<HwModule> module;
7911    sp<IOProfile> profile;
7912    sp<DeviceDescriptor> defaultInputDevice = new DeviceDescriptor(String8(""),
7913                                                                   AUDIO_DEVICE_IN_BUILTIN_MIC);
7914    mAvailableOutputDevices.add(mDefaultOutputDevice);
7915    mAvailableInputDevices.add(defaultInputDevice);
7916
7917    module = new HwModule("primary");
7918
7919    profile = new IOProfile(String8("primary"), AUDIO_PORT_ROLE_SOURCE, module);
7920    profile->mSamplingRates.add(44100);
7921    profile->mFormats.add(AUDIO_FORMAT_PCM_16_BIT);
7922    profile->mChannelMasks.add(AUDIO_CHANNEL_OUT_STEREO);
7923    profile->mSupportedDevices.add(mDefaultOutputDevice);
7924    profile->mFlags = AUDIO_OUTPUT_FLAG_PRIMARY;
7925    module->mOutputProfiles.add(profile);
7926
7927    profile = new IOProfile(String8("primary"), AUDIO_PORT_ROLE_SINK, module);
7928    profile->mSamplingRates.add(8000);
7929    profile->mFormats.add(AUDIO_FORMAT_PCM_16_BIT);
7930    profile->mChannelMasks.add(AUDIO_CHANNEL_IN_MONO);
7931    profile->mSupportedDevices.add(defaultInputDevice);
7932    module->mInputProfiles.add(profile);
7933
7934    mHwModules.add(module);
7935}
7936
7937audio_stream_type_t AudioPolicyManager::streamTypefromAttributesInt(const audio_attributes_t *attr)
7938{
7939    // flags to stream type mapping
7940    if ((attr->flags & AUDIO_FLAG_AUDIBILITY_ENFORCED) == AUDIO_FLAG_AUDIBILITY_ENFORCED) {
7941        return AUDIO_STREAM_ENFORCED_AUDIBLE;
7942    }
7943    if ((attr->flags & AUDIO_FLAG_SCO) == AUDIO_FLAG_SCO) {
7944        return AUDIO_STREAM_BLUETOOTH_SCO;
7945    }
7946
7947    // usage to stream type mapping
7948    switch (attr->usage) {
7949    case AUDIO_USAGE_MEDIA:
7950    case AUDIO_USAGE_GAME:
7951    case AUDIO_USAGE_ASSISTANCE_NAVIGATION_GUIDANCE:
7952        return AUDIO_STREAM_MUSIC;
7953    case AUDIO_USAGE_ASSISTANCE_ACCESSIBILITY:
7954        if (isStreamActive(AUDIO_STREAM_ALARM)) {
7955            return AUDIO_STREAM_ALARM;
7956        }
7957        if (isStreamActive(AUDIO_STREAM_RING)) {
7958            return AUDIO_STREAM_RING;
7959        }
7960        if (isInCall()) {
7961            return AUDIO_STREAM_VOICE_CALL;
7962        }
7963        return AUDIO_STREAM_ACCESSIBILITY;
7964    case AUDIO_USAGE_ASSISTANCE_SONIFICATION:
7965        return AUDIO_STREAM_SYSTEM;
7966    case AUDIO_USAGE_VOICE_COMMUNICATION:
7967        return AUDIO_STREAM_VOICE_CALL;
7968
7969    case AUDIO_USAGE_VOICE_COMMUNICATION_SIGNALLING:
7970        return AUDIO_STREAM_DTMF;
7971
7972    case AUDIO_USAGE_ALARM:
7973        return AUDIO_STREAM_ALARM;
7974    case AUDIO_USAGE_NOTIFICATION_TELEPHONY_RINGTONE:
7975        return AUDIO_STREAM_RING;
7976
7977    case AUDIO_USAGE_NOTIFICATION:
7978    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_REQUEST:
7979    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_INSTANT:
7980    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_DELAYED:
7981    case AUDIO_USAGE_NOTIFICATION_EVENT:
7982        return AUDIO_STREAM_NOTIFICATION;
7983
7984    case AUDIO_USAGE_UNKNOWN:
7985    default:
7986        return AUDIO_STREAM_MUSIC;
7987    }
7988}
7989
7990bool AudioPolicyManager::isValidAttributes(const audio_attributes_t *paa) {
7991    // has flags that map to a strategy?
7992    if ((paa->flags & (AUDIO_FLAG_AUDIBILITY_ENFORCED | AUDIO_FLAG_SCO | AUDIO_FLAG_BEACON)) != 0) {
7993        return true;
7994    }
7995
7996    // has known usage?
7997    switch (paa->usage) {
7998    case AUDIO_USAGE_UNKNOWN:
7999    case AUDIO_USAGE_MEDIA:
8000    case AUDIO_USAGE_VOICE_COMMUNICATION:
8001    case AUDIO_USAGE_VOICE_COMMUNICATION_SIGNALLING:
8002    case AUDIO_USAGE_ALARM:
8003    case AUDIO_USAGE_NOTIFICATION:
8004    case AUDIO_USAGE_NOTIFICATION_TELEPHONY_RINGTONE:
8005    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_REQUEST:
8006    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_INSTANT:
8007    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_DELAYED:
8008    case AUDIO_USAGE_NOTIFICATION_EVENT:
8009    case AUDIO_USAGE_ASSISTANCE_ACCESSIBILITY:
8010    case AUDIO_USAGE_ASSISTANCE_NAVIGATION_GUIDANCE:
8011    case AUDIO_USAGE_ASSISTANCE_SONIFICATION:
8012    case AUDIO_USAGE_GAME:
8013    case AUDIO_USAGE_VIRTUAL_SOURCE:
8014        break;
8015    default:
8016        return false;
8017    }
8018    return true;
8019}
8020
8021}; // namespace android
8022