AudioPolicyManager.cpp revision c722f30eef03e77054395ae122470cf8dba93937 
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    String8 address = (device_address == NULL) ? String8("") : String8(device_address);
219    // handle legacy remote submix case where the address was not always specified
220    if (deviceDistinguishesOnAddress(device) && (address.length() == 0)) {
221        address = String8("0");
222    }
223
224    ALOGV("setDeviceConnectionState() device: %x, state %d, address %s",
225            device, state, address.string());
226
227    // connect/disconnect only 1 device at a time
228    if (!audio_is_output_device(device) && !audio_is_input_device(device)) return BAD_VALUE;
229
230    // handle output devices
231    if (audio_is_output_device(device)) {
232        SortedVector <audio_io_handle_t> outputs;
233
234        sp<DeviceDescriptor> devDesc = new DeviceDescriptor(String8(""), device);
235        devDesc->mAddress = address;
236        ssize_t index = mAvailableOutputDevices.indexOf(devDesc);
237
238        // save a copy of the opened output descriptors before any output is opened or closed
239        // by checkOutputsForDevice(). This will be needed by checkOutputForAllStrategies()
240        mPreviousOutputs = mOutputs;
241        switch (state)
242        {
243        // handle output device connection
244        case AUDIO_POLICY_DEVICE_STATE_AVAILABLE:
245            if (index >= 0) {
246                ALOGW("setDeviceConnectionState() device already connected: %x", device);
247                return INVALID_OPERATION;
248            }
249            ALOGV("setDeviceConnectionState() connecting device %x", device);
250
251            // register new device as available
252            index = mAvailableOutputDevices.add(devDesc);
253            if (index >= 0) {
254                sp<HwModule> module = getModuleForDevice(device);
255                if (module == 0) {
256                    ALOGD("setDeviceConnectionState() could not find HW module for device %08x",
257                          device);
258                    mAvailableOutputDevices.remove(devDesc);
259                    return INVALID_OPERATION;
260                }
261                mAvailableOutputDevices[index]->mId = nextUniqueId();
262                mAvailableOutputDevices[index]->mModule = module;
263            } else {
264                return NO_MEMORY;
265            }
266
267            if (checkOutputsForDevice(devDesc, state, outputs, address) != NO_ERROR) {
268                mAvailableOutputDevices.remove(devDesc);
269                return INVALID_OPERATION;
270            }
271            // outputs should never be empty here
272            ALOG_ASSERT(outputs.size() != 0, "setDeviceConnectionState():"
273                    "checkOutputsForDevice() returned no outputs but status OK");
274            ALOGV("setDeviceConnectionState() checkOutputsForDevice() returned %zu outputs",
275                  outputs.size());
276            break;
277        // handle output device disconnection
278        case AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE: {
279            if (index < 0) {
280                ALOGW("setDeviceConnectionState() device not connected: %x", device);
281                return INVALID_OPERATION;
282            }
283
284            ALOGV("setDeviceConnectionState() disconnecting output device %x", device);
285
286            // Set Disconnect to HALs
287            AudioParameter param = AudioParameter(address);
288            param.addInt(String8(AUDIO_PARAMETER_DEVICE_DISCONNECT), device);
289            mpClientInterface->setParameters(AUDIO_IO_HANDLE_NONE, param.toString());
290
291            // remove device from available output devices
292            mAvailableOutputDevices.remove(devDesc);
293
294            checkOutputsForDevice(devDesc, state, outputs, address);
295            } break;
296
297        default:
298            ALOGE("setDeviceConnectionState() invalid state: %x", state);
299            return BAD_VALUE;
300        }
301
302        // checkA2dpSuspend must run before checkOutputForAllStrategies so that A2DP
303        // output is suspended before any tracks are moved to it
304        checkA2dpSuspend();
305        checkOutputForAllStrategies();
306        // outputs must be closed after checkOutputForAllStrategies() is executed
307        if (!outputs.isEmpty()) {
308            for (size_t i = 0; i < outputs.size(); i++) {
309                sp<AudioOutputDescriptor> desc = mOutputs.valueFor(outputs[i]);
310                // close unused outputs after device disconnection or direct outputs that have been
311                // opened by checkOutputsForDevice() to query dynamic parameters
312                if ((state == AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE) ||
313                        (((desc->mFlags & AUDIO_OUTPUT_FLAG_DIRECT) != 0) &&
314                         (desc->mDirectOpenCount == 0))) {
315                    closeOutput(outputs[i]);
316                }
317            }
318            // check again after closing A2DP output to reset mA2dpSuspended if needed
319            checkA2dpSuspend();
320        }
321
322        updateDevicesAndOutputs();
323        if (mPhoneState == AUDIO_MODE_IN_CALL) {
324            audio_devices_t newDevice = getNewOutputDevice(mPrimaryOutput, false /*fromCache*/);
325            updateCallRouting(newDevice);
326        }
327        for (size_t i = 0; i < mOutputs.size(); i++) {
328            audio_io_handle_t output = mOutputs.keyAt(i);
329            if ((mPhoneState != AUDIO_MODE_IN_CALL) || (output != mPrimaryOutput)) {
330                audio_devices_t newDevice = getNewOutputDevice(mOutputs.keyAt(i),
331                                                               true /*fromCache*/);
332                // do not force device change on duplicated output because if device is 0, it will
333                // also force a device 0 for the two outputs it is duplicated to which may override
334                // a valid device selection on those outputs.
335                bool force = !mOutputs.valueAt(i)->isDuplicated()
336                        && (!deviceDistinguishesOnAddress(device)
337                                // always force when disconnecting (a non-duplicated device)
338                                || (state == AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE));
339                setOutputDevice(output, newDevice, force, 0);
340            }
341        }
342
343        mpClientInterface->onAudioPortListUpdate();
344        return NO_ERROR;
345    }  // end if is output device
346
347    // handle input devices
348    if (audio_is_input_device(device)) {
349        SortedVector <audio_io_handle_t> inputs;
350
351        sp<DeviceDescriptor> devDesc = new DeviceDescriptor(String8(""), device);
352        devDesc->mAddress = address;
353        ssize_t index = mAvailableInputDevices.indexOf(devDesc);
354        switch (state)
355        {
356        // handle input device connection
357        case AUDIO_POLICY_DEVICE_STATE_AVAILABLE: {
358            if (index >= 0) {
359                ALOGW("setDeviceConnectionState() device already connected: %d", device);
360                return INVALID_OPERATION;
361            }
362            sp<HwModule> module = getModuleForDevice(device);
363            if (module == NULL) {
364                ALOGW("setDeviceConnectionState(): could not find HW module for device %08x",
365                      device);
366                return INVALID_OPERATION;
367            }
368            if (checkInputsForDevice(device, state, inputs, address) != NO_ERROR) {
369                return INVALID_OPERATION;
370            }
371
372            index = mAvailableInputDevices.add(devDesc);
373            if (index >= 0) {
374                mAvailableInputDevices[index]->mId = nextUniqueId();
375                mAvailableInputDevices[index]->mModule = module;
376            } else {
377                return NO_MEMORY;
378            }
379        } break;
380
381        // handle input device disconnection
382        case AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE: {
383            if (index < 0) {
384                ALOGW("setDeviceConnectionState() device not connected: %d", device);
385                return INVALID_OPERATION;
386            }
387
388            ALOGV("setDeviceConnectionState() disconnecting input device %x", device);
389
390            // Set Disconnect to HALs
391            AudioParameter param = AudioParameter(address);
392            param.addInt(String8(AUDIO_PARAMETER_DEVICE_DISCONNECT), device);
393            mpClientInterface->setParameters(AUDIO_IO_HANDLE_NONE, param.toString());
394
395            checkInputsForDevice(device, state, inputs, address);
396            mAvailableInputDevices.remove(devDesc);
397
398        } break;
399
400        default:
401            ALOGE("setDeviceConnectionState() invalid state: %x", state);
402            return BAD_VALUE;
403        }
404
405        closeAllInputs();
406
407        if (mPhoneState == AUDIO_MODE_IN_CALL) {
408            audio_devices_t newDevice = getNewOutputDevice(mPrimaryOutput, false /*fromCache*/);
409            updateCallRouting(newDevice);
410        }
411
412        mpClientInterface->onAudioPortListUpdate();
413        return NO_ERROR;
414    } // end if is input device
415
416    ALOGW("setDeviceConnectionState() invalid device: %x", device);
417    return BAD_VALUE;
418}
419
420audio_policy_dev_state_t AudioPolicyManager::getDeviceConnectionState(audio_devices_t device,
421                                                  const char *device_address)
422{
423    audio_policy_dev_state_t state = AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE;
424    sp<DeviceDescriptor> devDesc = new DeviceDescriptor(String8(""), device);
425    devDesc->mAddress = (device_address == NULL) ? String8("") : String8(device_address);
426    // handle legacy remote submix case where the address was not always specified
427    if (deviceDistinguishesOnAddress(device) && (devDesc->mAddress.length() == 0)) {
428        devDesc->mAddress = String8("0");
429    }
430    ssize_t index;
431    DeviceVector *deviceVector;
432
433    if (audio_is_output_device(device)) {
434        deviceVector = &mAvailableOutputDevices;
435    } else if (audio_is_input_device(device)) {
436        deviceVector = &mAvailableInputDevices;
437    } else {
438        ALOGW("getDeviceConnectionState() invalid device type %08x", device);
439        return AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE;
440    }
441
442    index = deviceVector->indexOf(devDesc);
443    if (index >= 0) {
444        return AUDIO_POLICY_DEVICE_STATE_AVAILABLE;
445    } else {
446        return AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE;
447    }
448}
449
450void AudioPolicyManager::updateCallRouting(audio_devices_t rxDevice, int delayMs)
451{
452    bool createTxPatch = false;
453    struct audio_patch patch;
454    patch.num_sources = 1;
455    patch.num_sinks = 1;
456    status_t status;
457    audio_patch_handle_t afPatchHandle;
458    DeviceVector deviceList;
459
460    audio_devices_t txDevice = getDeviceForInputSource(AUDIO_SOURCE_VOICE_COMMUNICATION);
461    ALOGV("updateCallRouting device rxDevice %08x txDevice %08x", rxDevice, txDevice);
462
463    // release existing RX patch if any
464    if (mCallRxPatch != 0) {
465        mpClientInterface->releaseAudioPatch(mCallRxPatch->mAfPatchHandle, 0);
466        mCallRxPatch.clear();
467    }
468    // release TX patch if any
469    if (mCallTxPatch != 0) {
470        mpClientInterface->releaseAudioPatch(mCallTxPatch->mAfPatchHandle, 0);
471        mCallTxPatch.clear();
472    }
473
474    // If the RX device is on the primary HW module, then use legacy routing method for voice calls
475    // via setOutputDevice() on primary output.
476    // Otherwise, create two audio patches for TX and RX path.
477    if (availablePrimaryOutputDevices() & rxDevice) {
478        setOutputDevice(mPrimaryOutput, rxDevice, true, delayMs);
479        // If the TX device is also on the primary HW module, setOutputDevice() will take care
480        // of it due to legacy implementation. If not, create a patch.
481        if ((availablePrimaryInputDevices() & txDevice & ~AUDIO_DEVICE_BIT_IN)
482                == AUDIO_DEVICE_NONE) {
483            createTxPatch = true;
484        }
485    } else {
486        // create RX path audio patch
487        deviceList = mAvailableOutputDevices.getDevicesFromType(rxDevice);
488        ALOG_ASSERT(!deviceList.isEmpty(),
489                    "updateCallRouting() selected device not in output device list");
490        sp<DeviceDescriptor> rxSinkDeviceDesc = deviceList.itemAt(0);
491        deviceList = mAvailableInputDevices.getDevicesFromType(AUDIO_DEVICE_IN_TELEPHONY_RX);
492        ALOG_ASSERT(!deviceList.isEmpty(),
493                    "updateCallRouting() no telephony RX device");
494        sp<DeviceDescriptor> rxSourceDeviceDesc = deviceList.itemAt(0);
495
496        rxSourceDeviceDesc->toAudioPortConfig(&patch.sources[0]);
497        rxSinkDeviceDesc->toAudioPortConfig(&patch.sinks[0]);
498
499        // request to reuse existing output stream if one is already opened to reach the RX device
500        SortedVector<audio_io_handle_t> outputs =
501                                getOutputsForDevice(rxDevice, mOutputs);
502        audio_io_handle_t output = selectOutput(outputs,
503                                                AUDIO_OUTPUT_FLAG_NONE,
504                                                AUDIO_FORMAT_INVALID);
505        if (output != AUDIO_IO_HANDLE_NONE) {
506            sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
507            ALOG_ASSERT(!outputDesc->isDuplicated(),
508                        "updateCallRouting() RX device output is duplicated");
509            outputDesc->toAudioPortConfig(&patch.sources[1]);
510            patch.num_sources = 2;
511        }
512
513        afPatchHandle = AUDIO_PATCH_HANDLE_NONE;
514        status = mpClientInterface->createAudioPatch(&patch, &afPatchHandle, 0);
515        ALOGW_IF(status != NO_ERROR, "updateCallRouting() error %d creating RX audio patch",
516                                               status);
517        if (status == NO_ERROR) {
518            mCallRxPatch = new AudioPatch((audio_patch_handle_t)nextUniqueId(),
519                                       &patch, mUidCached);
520            mCallRxPatch->mAfPatchHandle = afPatchHandle;
521            mCallRxPatch->mUid = mUidCached;
522        }
523        createTxPatch = true;
524    }
525    if (createTxPatch) {
526
527        struct audio_patch patch;
528        patch.num_sources = 1;
529        patch.num_sinks = 1;
530        deviceList = mAvailableInputDevices.getDevicesFromType(txDevice);
531        ALOG_ASSERT(!deviceList.isEmpty(),
532                    "updateCallRouting() selected device not in input device list");
533        sp<DeviceDescriptor> txSourceDeviceDesc = deviceList.itemAt(0);
534        txSourceDeviceDesc->toAudioPortConfig(&patch.sources[0]);
535        deviceList = mAvailableOutputDevices.getDevicesFromType(AUDIO_DEVICE_OUT_TELEPHONY_TX);
536        ALOG_ASSERT(!deviceList.isEmpty(),
537                    "updateCallRouting() no telephony TX device");
538        sp<DeviceDescriptor> txSinkDeviceDesc = deviceList.itemAt(0);
539        txSinkDeviceDesc->toAudioPortConfig(&patch.sinks[0]);
540
541        SortedVector<audio_io_handle_t> outputs =
542                                getOutputsForDevice(AUDIO_DEVICE_OUT_TELEPHONY_TX, mOutputs);
543        audio_io_handle_t output = selectOutput(outputs,
544                                                AUDIO_OUTPUT_FLAG_NONE,
545                                                AUDIO_FORMAT_INVALID);
546        // request to reuse existing output stream if one is already opened to reach the TX
547        // path output device
548        if (output != AUDIO_IO_HANDLE_NONE) {
549            sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
550            ALOG_ASSERT(!outputDesc->isDuplicated(),
551                        "updateCallRouting() RX device output is duplicated");
552            outputDesc->toAudioPortConfig(&patch.sources[1]);
553            patch.num_sources = 2;
554        }
555
556        afPatchHandle = AUDIO_PATCH_HANDLE_NONE;
557        status = mpClientInterface->createAudioPatch(&patch, &afPatchHandle, 0);
558        ALOGW_IF(status != NO_ERROR, "setPhoneState() error %d creating TX audio patch",
559                                               status);
560        if (status == NO_ERROR) {
561            mCallTxPatch = new AudioPatch((audio_patch_handle_t)nextUniqueId(),
562                                       &patch, mUidCached);
563            mCallTxPatch->mAfPatchHandle = afPatchHandle;
564            mCallTxPatch->mUid = mUidCached;
565        }
566    }
567}
568
569void AudioPolicyManager::setPhoneState(audio_mode_t state)
570{
571    ALOGV("setPhoneState() state %d", state);
572    if (state < 0 || state >= AUDIO_MODE_CNT) {
573        ALOGW("setPhoneState() invalid state %d", state);
574        return;
575    }
576
577    if (state == mPhoneState ) {
578        ALOGW("setPhoneState() setting same state %d", state);
579        return;
580    }
581
582    // if leaving call state, handle special case of active streams
583    // pertaining to sonification strategy see handleIncallSonification()
584    if (isInCall()) {
585        ALOGV("setPhoneState() in call state management: new state is %d", state);
586        for (int stream = 0; stream < AUDIO_STREAM_CNT; stream++) {
587            if (stream == AUDIO_STREAM_PATCH) {
588                continue;
589            }
590            handleIncallSonification((audio_stream_type_t)stream, false, true);
591        }
592    }
593
594    // store previous phone state for management of sonification strategy below
595    int oldState = mPhoneState;
596    mPhoneState = state;
597    bool force = false;
598
599    // are we entering or starting a call
600    if (!isStateInCall(oldState) && isStateInCall(state)) {
601        ALOGV("  Entering call in setPhoneState()");
602        // force routing command to audio hardware when starting a call
603        // even if no device change is needed
604        force = true;
605        for (int j = 0; j < DEVICE_CATEGORY_CNT; j++) {
606            mStreams[AUDIO_STREAM_DTMF].mVolumeCurve[j] =
607                    sVolumeProfiles[AUDIO_STREAM_VOICE_CALL][j];
608        }
609    } else if (isStateInCall(oldState) && !isStateInCall(state)) {
610        ALOGV("  Exiting call in setPhoneState()");
611        // force routing command to audio hardware when exiting a call
612        // even if no device change is needed
613        force = true;
614        for (int j = 0; j < DEVICE_CATEGORY_CNT; j++) {
615            mStreams[AUDIO_STREAM_DTMF].mVolumeCurve[j] =
616                    sVolumeProfiles[AUDIO_STREAM_DTMF][j];
617        }
618    } else if (isStateInCall(state) && (state != oldState)) {
619        ALOGV("  Switching between telephony and VoIP in setPhoneState()");
620        // force routing command to audio hardware when switching between telephony and VoIP
621        // even if no device change is needed
622        force = true;
623    }
624
625    // check for device and output changes triggered by new phone state
626    checkA2dpSuspend();
627    checkOutputForAllStrategies();
628    updateDevicesAndOutputs();
629
630    sp<AudioOutputDescriptor> hwOutputDesc = mOutputs.valueFor(mPrimaryOutput);
631
632    int delayMs = 0;
633    if (isStateInCall(state)) {
634        nsecs_t sysTime = systemTime();
635        for (size_t i = 0; i < mOutputs.size(); i++) {
636            sp<AudioOutputDescriptor> desc = mOutputs.valueAt(i);
637            // mute media and sonification strategies and delay device switch by the largest
638            // latency of any output where either strategy is active.
639            // This avoid sending the ring tone or music tail into the earpiece or headset.
640            if ((desc->isStrategyActive(STRATEGY_MEDIA,
641                                     SONIFICATION_HEADSET_MUSIC_DELAY,
642                                     sysTime) ||
643                    desc->isStrategyActive(STRATEGY_SONIFICATION,
644                                         SONIFICATION_HEADSET_MUSIC_DELAY,
645                                         sysTime)) &&
646                    (delayMs < (int)desc->mLatency*2)) {
647                delayMs = desc->mLatency*2;
648            }
649            setStrategyMute(STRATEGY_MEDIA, true, mOutputs.keyAt(i));
650            setStrategyMute(STRATEGY_MEDIA, false, mOutputs.keyAt(i), MUTE_TIME_MS,
651                getDeviceForStrategy(STRATEGY_MEDIA, true /*fromCache*/));
652            setStrategyMute(STRATEGY_SONIFICATION, true, mOutputs.keyAt(i));
653            setStrategyMute(STRATEGY_SONIFICATION, false, mOutputs.keyAt(i), MUTE_TIME_MS,
654                getDeviceForStrategy(STRATEGY_SONIFICATION, true /*fromCache*/));
655        }
656    }
657
658    // Note that despite the fact that getNewOutputDevice() is called on the primary output,
659    // the device returned is not necessarily reachable via this output
660    audio_devices_t rxDevice = getNewOutputDevice(mPrimaryOutput, false /*fromCache*/);
661    // force routing command to audio hardware when ending call
662    // even if no device change is needed
663    if (isStateInCall(oldState) && rxDevice == AUDIO_DEVICE_NONE) {
664        rxDevice = hwOutputDesc->device();
665    }
666
667    if (state == AUDIO_MODE_IN_CALL) {
668        updateCallRouting(rxDevice, delayMs);
669    } else if (oldState == AUDIO_MODE_IN_CALL) {
670        if (mCallRxPatch != 0) {
671            mpClientInterface->releaseAudioPatch(mCallRxPatch->mAfPatchHandle, 0);
672            mCallRxPatch.clear();
673        }
674        if (mCallTxPatch != 0) {
675            mpClientInterface->releaseAudioPatch(mCallTxPatch->mAfPatchHandle, 0);
676            mCallTxPatch.clear();
677        }
678        setOutputDevice(mPrimaryOutput, rxDevice, force, 0);
679    } else {
680        setOutputDevice(mPrimaryOutput, rxDevice, force, 0);
681    }
682    // if entering in call state, handle special case of active streams
683    // pertaining to sonification strategy see handleIncallSonification()
684    if (isStateInCall(state)) {
685        ALOGV("setPhoneState() in call state management: new state is %d", state);
686        for (int stream = 0; stream < AUDIO_STREAM_CNT; stream++) {
687            if (stream == AUDIO_STREAM_PATCH) {
688                continue;
689            }
690            handleIncallSonification((audio_stream_type_t)stream, true, true);
691        }
692    }
693
694    // Flag that ringtone volume must be limited to music volume until we exit MODE_RINGTONE
695    if (state == AUDIO_MODE_RINGTONE &&
696        isStreamActive(AUDIO_STREAM_MUSIC, SONIFICATION_HEADSET_MUSIC_DELAY)) {
697        mLimitRingtoneVolume = true;
698    } else {
699        mLimitRingtoneVolume = false;
700    }
701}
702
703void AudioPolicyManager::setForceUse(audio_policy_force_use_t usage,
704                                         audio_policy_forced_cfg_t config)
705{
706    ALOGV("setForceUse() usage %d, config %d, mPhoneState %d", usage, config, mPhoneState);
707
708    bool forceVolumeReeval = false;
709    switch(usage) {
710    case AUDIO_POLICY_FORCE_FOR_COMMUNICATION:
711        if (config != AUDIO_POLICY_FORCE_SPEAKER && config != AUDIO_POLICY_FORCE_BT_SCO &&
712            config != AUDIO_POLICY_FORCE_NONE) {
713            ALOGW("setForceUse() invalid config %d for FOR_COMMUNICATION", config);
714            return;
715        }
716        forceVolumeReeval = true;
717        mForceUse[usage] = config;
718        break;
719    case AUDIO_POLICY_FORCE_FOR_MEDIA:
720        if (config != AUDIO_POLICY_FORCE_HEADPHONES && config != AUDIO_POLICY_FORCE_BT_A2DP &&
721            config != AUDIO_POLICY_FORCE_WIRED_ACCESSORY &&
722            config != AUDIO_POLICY_FORCE_ANALOG_DOCK &&
723            config != AUDIO_POLICY_FORCE_DIGITAL_DOCK && config != AUDIO_POLICY_FORCE_NONE &&
724            config != AUDIO_POLICY_FORCE_NO_BT_A2DP && config != AUDIO_POLICY_FORCE_SPEAKER ) {
725            ALOGW("setForceUse() invalid config %d for FOR_MEDIA", config);
726            return;
727        }
728        mForceUse[usage] = config;
729        break;
730    case AUDIO_POLICY_FORCE_FOR_RECORD:
731        if (config != AUDIO_POLICY_FORCE_BT_SCO && config != AUDIO_POLICY_FORCE_WIRED_ACCESSORY &&
732            config != AUDIO_POLICY_FORCE_NONE) {
733            ALOGW("setForceUse() invalid config %d for FOR_RECORD", config);
734            return;
735        }
736        mForceUse[usage] = config;
737        break;
738    case AUDIO_POLICY_FORCE_FOR_DOCK:
739        if (config != AUDIO_POLICY_FORCE_NONE && config != AUDIO_POLICY_FORCE_BT_CAR_DOCK &&
740            config != AUDIO_POLICY_FORCE_BT_DESK_DOCK &&
741            config != AUDIO_POLICY_FORCE_WIRED_ACCESSORY &&
742            config != AUDIO_POLICY_FORCE_ANALOG_DOCK &&
743            config != AUDIO_POLICY_FORCE_DIGITAL_DOCK) {
744            ALOGW("setForceUse() invalid config %d for FOR_DOCK", config);
745        }
746        forceVolumeReeval = true;
747        mForceUse[usage] = config;
748        break;
749    case AUDIO_POLICY_FORCE_FOR_SYSTEM:
750        if (config != AUDIO_POLICY_FORCE_NONE &&
751            config != AUDIO_POLICY_FORCE_SYSTEM_ENFORCED) {
752            ALOGW("setForceUse() invalid config %d for FOR_SYSTEM", config);
753        }
754        forceVolumeReeval = true;
755        mForceUse[usage] = config;
756        break;
757    case AUDIO_POLICY_FORCE_FOR_HDMI_SYSTEM_AUDIO:
758        if (config != AUDIO_POLICY_FORCE_NONE &&
759            config != AUDIO_POLICY_FORCE_HDMI_SYSTEM_AUDIO_ENFORCED) {
760            ALOGW("setForceUse() invalid config %d forHDMI_SYSTEM_AUDIO", config);
761        }
762        mForceUse[usage] = config;
763        break;
764    default:
765        ALOGW("setForceUse() invalid usage %d", usage);
766        break;
767    }
768
769    // check for device and output changes triggered by new force usage
770    checkA2dpSuspend();
771    checkOutputForAllStrategies();
772    updateDevicesAndOutputs();
773    if (mPhoneState == AUDIO_MODE_IN_CALL) {
774        audio_devices_t newDevice = getNewOutputDevice(mPrimaryOutput, true /*fromCache*/);
775        updateCallRouting(newDevice);
776    }
777    for (size_t i = 0; i < mOutputs.size(); i++) {
778        audio_io_handle_t output = mOutputs.keyAt(i);
779        audio_devices_t newDevice = getNewOutputDevice(output, true /*fromCache*/);
780        if ((mPhoneState != AUDIO_MODE_IN_CALL) || (output != mPrimaryOutput)) {
781            setOutputDevice(output, newDevice, (newDevice != AUDIO_DEVICE_NONE));
782        }
783        if (forceVolumeReeval && (newDevice != AUDIO_DEVICE_NONE)) {
784            applyStreamVolumes(output, newDevice, 0, true);
785        }
786    }
787
788    audio_io_handle_t activeInput = getActiveInput();
789    if (activeInput != 0) {
790        setInputDevice(activeInput, getNewInputDevice(activeInput));
791    }
792
793}
794
795audio_policy_forced_cfg_t AudioPolicyManager::getForceUse(audio_policy_force_use_t usage)
796{
797    return mForceUse[usage];
798}
799
800void AudioPolicyManager::setSystemProperty(const char* property, const char* value)
801{
802    ALOGV("setSystemProperty() property %s, value %s", property, value);
803}
804
805// Find a direct output profile compatible with the parameters passed, even if the input flags do
806// not explicitly request a direct output
807sp<AudioPolicyManager::IOProfile> AudioPolicyManager::getProfileForDirectOutput(
808                                                               audio_devices_t device,
809                                                               uint32_t samplingRate,
810                                                               audio_format_t format,
811                                                               audio_channel_mask_t channelMask,
812                                                               audio_output_flags_t flags)
813{
814    for (size_t i = 0; i < mHwModules.size(); i++) {
815        if (mHwModules[i]->mHandle == 0) {
816            continue;
817        }
818        for (size_t j = 0; j < mHwModules[i]->mOutputProfiles.size(); j++) {
819            sp<IOProfile> profile = mHwModules[i]->mOutputProfiles[j];
820            bool found = profile->isCompatibleProfile(device, String8(""), samplingRate,
821                    NULL /*updatedSamplingRate*/, format, channelMask,
822                    flags & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD ?
823                        AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD : AUDIO_OUTPUT_FLAG_DIRECT);
824            if (found && (mAvailableOutputDevices.types() & profile->mSupportedDevices.types())) {
825                return profile;
826            }
827        }
828    }
829    return 0;
830}
831
832audio_io_handle_t AudioPolicyManager::getOutput(audio_stream_type_t stream,
833                                    uint32_t samplingRate,
834                                    audio_format_t format,
835                                    audio_channel_mask_t channelMask,
836                                    audio_output_flags_t flags,
837                                    const audio_offload_info_t *offloadInfo)
838{
839    routing_strategy strategy = getStrategy(stream);
840    audio_devices_t device = getDeviceForStrategy(strategy, false /*fromCache*/);
841    ALOGV("getOutput() device %d, stream %d, samplingRate %d, format %x, channelMask %x, flags %x",
842          device, stream, samplingRate, format, channelMask, flags);
843
844    return getOutputForDevice(device, AUDIO_SESSION_ALLOCATE,
845                              stream, samplingRate,format, channelMask,
846                              flags, offloadInfo);
847}
848
849status_t AudioPolicyManager::getOutputForAttr(const audio_attributes_t *attr,
850                                              audio_io_handle_t *output,
851                                              audio_session_t session,
852                                              audio_stream_type_t *stream,
853                                              uint32_t samplingRate,
854                                              audio_format_t format,
855                                              audio_channel_mask_t channelMask,
856                                              audio_output_flags_t flags,
857                                              const audio_offload_info_t *offloadInfo)
858{
859    audio_attributes_t attributes;
860    if (attr != NULL) {
861        if (!isValidAttributes(attr)) {
862            ALOGE("getOutputForAttr() invalid attributes: usage=%d content=%d flags=0x%x tags=[%s]",
863                  attr->usage, attr->content_type, attr->flags,
864                  attr->tags);
865            return BAD_VALUE;
866        }
867        attributes = *attr;
868    } else {
869        if (*stream < AUDIO_STREAM_MIN || *stream >= AUDIO_STREAM_PUBLIC_CNT) {
870            ALOGE("getOutputForAttr():  invalid stream type");
871            return BAD_VALUE;
872        }
873        stream_type_to_audio_attributes(*stream, &attributes);
874    }
875
876    for (size_t i = 0; i < mPolicyMixes.size(); i++) {
877        sp<AudioOutputDescriptor> desc;
878        if (mPolicyMixes[i]->mMix.mMixType == MIX_TYPE_PLAYERS) {
879            for (size_t j = 0; j < mPolicyMixes[i]->mMix.mCriteria.size(); j++) {
880                if ((RULE_MATCH_ATTRIBUTE_USAGE == mPolicyMixes[i]->mMix.mCriteria[j].mRule &&
881                        mPolicyMixes[i]->mMix.mCriteria[j].mAttr.mUsage == attributes.usage) ||
882                    (RULE_EXCLUDE_ATTRIBUTE_USAGE == mPolicyMixes[i]->mMix.mCriteria[j].mRule &&
883                        mPolicyMixes[i]->mMix.mCriteria[j].mAttr.mUsage != attributes.usage)) {
884                    desc = mPolicyMixes[i]->mOutput;
885                    break;
886                }
887                if (strncmp(attributes.tags, "addr=", strlen("addr=")) == 0 &&
888                        strncmp(attributes.tags + strlen("addr="),
889                                mPolicyMixes[i]->mMix.mRegistrationId.string(),
890                                AUDIO_ATTRIBUTES_TAGS_MAX_SIZE - strlen("addr=") - 1) == 0) {
891                    desc = mPolicyMixes[i]->mOutput;
892                    break;
893                }
894            }
895        } else if (mPolicyMixes[i]->mMix.mMixType == MIX_TYPE_RECORDERS) {
896            if (attributes.usage == AUDIO_USAGE_VIRTUAL_SOURCE &&
897                    strncmp(attributes.tags, "addr=", strlen("addr=")) == 0 &&
898                    strncmp(attributes.tags + strlen("addr="),
899                            mPolicyMixes[i]->mMix.mRegistrationId.string(),
900                            AUDIO_ATTRIBUTES_TAGS_MAX_SIZE - strlen("addr=") - 1) == 0) {
901                desc = mPolicyMixes[i]->mOutput;
902            }
903        }
904        if (desc != 0) {
905            if (!audio_is_linear_pcm(format)) {
906                return BAD_VALUE;
907            }
908            desc->mPolicyMix = &mPolicyMixes[i]->mMix;
909            *stream = streamTypefromAttributesInt(&attributes);
910            *output = desc->mIoHandle;
911            ALOGV("getOutputForAttr() returns output %d", *output);
912            return NO_ERROR;
913        }
914    }
915    if (attributes.usage == AUDIO_USAGE_VIRTUAL_SOURCE) {
916        ALOGW("getOutputForAttr() no policy mix found for usage AUDIO_USAGE_VIRTUAL_SOURCE");
917        return BAD_VALUE;
918    }
919
920    ALOGV("getOutputForAttr() usage=%d, content=%d, tag=%s flags=%08x",
921            attributes.usage, attributes.content_type, attributes.tags, attributes.flags);
922
923    routing_strategy strategy = (routing_strategy) getStrategyForAttr(&attributes);
924    audio_devices_t device = getDeviceForStrategy(strategy, false /*fromCache*/);
925
926    if ((attributes.flags & AUDIO_FLAG_HW_AV_SYNC) != 0) {
927        flags = (audio_output_flags_t)(flags | AUDIO_OUTPUT_FLAG_HW_AV_SYNC);
928    }
929
930    ALOGV("getOutputForAttr() device 0x%x, samplingRate %d, format %x, channelMask %x, flags %x",
931          device, samplingRate, format, channelMask, flags);
932
933    *stream = streamTypefromAttributesInt(&attributes);
934    *output = getOutputForDevice(device, session, *stream,
935                                 samplingRate, format, channelMask,
936                                 flags, offloadInfo);
937    if (*output == AUDIO_IO_HANDLE_NONE) {
938        return INVALID_OPERATION;
939    }
940    return NO_ERROR;
941}
942
943audio_io_handle_t AudioPolicyManager::getOutputForDevice(
944        audio_devices_t device,
945        audio_session_t session __unused,
946        audio_stream_type_t stream,
947        uint32_t samplingRate,
948        audio_format_t format,
949        audio_channel_mask_t channelMask,
950        audio_output_flags_t flags,
951        const audio_offload_info_t *offloadInfo)
952{
953    audio_io_handle_t output = AUDIO_IO_HANDLE_NONE;
954    uint32_t latency = 0;
955    status_t status;
956
957#ifdef AUDIO_POLICY_TEST
958    if (mCurOutput != 0) {
959        ALOGV("getOutput() test output mCurOutput %d, samplingRate %d, format %d, channelMask %x, mDirectOutput %d",
960                mCurOutput, mTestSamplingRate, mTestFormat, mTestChannels, mDirectOutput);
961
962        if (mTestOutputs[mCurOutput] == 0) {
963            ALOGV("getOutput() opening test output");
964            sp<AudioOutputDescriptor> outputDesc = new AudioOutputDescriptor(NULL);
965            outputDesc->mDevice = mTestDevice;
966            outputDesc->mLatency = mTestLatencyMs;
967            outputDesc->mFlags =
968                    (audio_output_flags_t)(mDirectOutput ? AUDIO_OUTPUT_FLAG_DIRECT : 0);
969            outputDesc->mRefCount[stream] = 0;
970            audio_config_t config = AUDIO_CONFIG_INITIALIZER;
971            config.sample_rate = mTestSamplingRate;
972            config.channel_mask = mTestChannels;
973            config.format = mTestFormat;
974            if (offloadInfo != NULL) {
975                config.offload_info = *offloadInfo;
976            }
977            status = mpClientInterface->openOutput(0,
978                                                  &mTestOutputs[mCurOutput],
979                                                  &config,
980                                                  &outputDesc->mDevice,
981                                                  String8(""),
982                                                  &outputDesc->mLatency,
983                                                  outputDesc->mFlags);
984            if (status == NO_ERROR) {
985                outputDesc->mSamplingRate = config.sample_rate;
986                outputDesc->mFormat = config.format;
987                outputDesc->mChannelMask = config.channel_mask;
988                AudioParameter outputCmd = AudioParameter();
989                outputCmd.addInt(String8("set_id"),mCurOutput);
990                mpClientInterface->setParameters(mTestOutputs[mCurOutput],outputCmd.toString());
991                addOutput(mTestOutputs[mCurOutput], outputDesc);
992            }
993        }
994        return mTestOutputs[mCurOutput];
995    }
996#endif //AUDIO_POLICY_TEST
997
998    // open a direct output if required by specified parameters
999    //force direct flag if offload flag is set: offloading implies a direct output stream
1000    // and all common behaviors are driven by checking only the direct flag
1001    // this should normally be set appropriately in the policy configuration file
1002    if ((flags & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) != 0) {
1003        flags = (audio_output_flags_t)(flags | AUDIO_OUTPUT_FLAG_DIRECT);
1004    }
1005    if ((flags & AUDIO_OUTPUT_FLAG_HW_AV_SYNC) != 0) {
1006        flags = (audio_output_flags_t)(flags | AUDIO_OUTPUT_FLAG_DIRECT);
1007    }
1008    // only allow deep buffering for music stream type
1009    if (stream != AUDIO_STREAM_MUSIC) {
1010        flags = (audio_output_flags_t)(flags &~AUDIO_OUTPUT_FLAG_DEEP_BUFFER);
1011    }
1012
1013    sp<IOProfile> profile;
1014
1015    // skip direct output selection if the request can obviously be attached to a mixed output
1016    // and not explicitly requested
1017    if (((flags & AUDIO_OUTPUT_FLAG_DIRECT) == 0) &&
1018            audio_is_linear_pcm(format) && samplingRate <= MAX_MIXER_SAMPLING_RATE &&
1019            audio_channel_count_from_out_mask(channelMask) <= 2) {
1020        goto non_direct_output;
1021    }
1022
1023    // Do not allow offloading if one non offloadable effect is enabled. This prevents from
1024    // creating an offloaded track and tearing it down immediately after start when audioflinger
1025    // detects there is an active non offloadable effect.
1026    // FIXME: We should check the audio session here but we do not have it in this context.
1027    // This may prevent offloading in rare situations where effects are left active by apps
1028    // in the background.
1029
1030    if (((flags & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) == 0) ||
1031            !isNonOffloadableEffectEnabled()) {
1032        profile = getProfileForDirectOutput(device,
1033                                           samplingRate,
1034                                           format,
1035                                           channelMask,
1036                                           (audio_output_flags_t)flags);
1037    }
1038
1039    if (profile != 0) {
1040        sp<AudioOutputDescriptor> outputDesc = NULL;
1041
1042        for (size_t i = 0; i < mOutputs.size(); i++) {
1043            sp<AudioOutputDescriptor> desc = mOutputs.valueAt(i);
1044            if (!desc->isDuplicated() && (profile == desc->mProfile)) {
1045                outputDesc = desc;
1046                // reuse direct output if currently open and configured with same parameters
1047                if ((samplingRate == outputDesc->mSamplingRate) &&
1048                        (format == outputDesc->mFormat) &&
1049                        (channelMask == outputDesc->mChannelMask)) {
1050                    outputDesc->mDirectOpenCount++;
1051                    ALOGV("getOutput() reusing direct output %d", mOutputs.keyAt(i));
1052                    return mOutputs.keyAt(i);
1053                }
1054            }
1055        }
1056        // close direct output if currently open and configured with different parameters
1057        if (outputDesc != NULL) {
1058            closeOutput(outputDesc->mIoHandle);
1059        }
1060        outputDesc = new AudioOutputDescriptor(profile);
1061        outputDesc->mDevice = device;
1062        outputDesc->mLatency = 0;
1063        outputDesc->mFlags =(audio_output_flags_t) (outputDesc->mFlags | flags);
1064        audio_config_t config = AUDIO_CONFIG_INITIALIZER;
1065        config.sample_rate = samplingRate;
1066        config.channel_mask = channelMask;
1067        config.format = format;
1068        if (offloadInfo != NULL) {
1069            config.offload_info = *offloadInfo;
1070        }
1071        status = mpClientInterface->openOutput(profile->mModule->mHandle,
1072                                               &output,
1073                                               &config,
1074                                               &outputDesc->mDevice,
1075                                               String8(""),
1076                                               &outputDesc->mLatency,
1077                                               outputDesc->mFlags);
1078
1079        // only accept an output with the requested parameters
1080        if (status != NO_ERROR ||
1081            (samplingRate != 0 && samplingRate != config.sample_rate) ||
1082            (format != AUDIO_FORMAT_DEFAULT && format != config.format) ||
1083            (channelMask != 0 && channelMask != config.channel_mask)) {
1084            ALOGV("getOutput() failed opening direct output: output %d samplingRate %d %d,"
1085                    "format %d %d, channelMask %04x %04x", output, samplingRate,
1086                    outputDesc->mSamplingRate, format, outputDesc->mFormat, channelMask,
1087                    outputDesc->mChannelMask);
1088            if (output != AUDIO_IO_HANDLE_NONE) {
1089                mpClientInterface->closeOutput(output);
1090            }
1091            return AUDIO_IO_HANDLE_NONE;
1092        }
1093        outputDesc->mSamplingRate = config.sample_rate;
1094        outputDesc->mChannelMask = config.channel_mask;
1095        outputDesc->mFormat = config.format;
1096        outputDesc->mRefCount[stream] = 0;
1097        outputDesc->mStopTime[stream] = 0;
1098        outputDesc->mDirectOpenCount = 1;
1099
1100        audio_io_handle_t srcOutput = getOutputForEffect();
1101        addOutput(output, outputDesc);
1102        audio_io_handle_t dstOutput = getOutputForEffect();
1103        if (dstOutput == output) {
1104            mpClientInterface->moveEffects(AUDIO_SESSION_OUTPUT_MIX, srcOutput, dstOutput);
1105        }
1106        mPreviousOutputs = mOutputs;
1107        ALOGV("getOutput() returns new direct output %d", output);
1108        mpClientInterface->onAudioPortListUpdate();
1109        return output;
1110    }
1111
1112non_direct_output:
1113
1114    // ignoring channel mask due to downmix capability in mixer
1115
1116    // open a non direct output
1117
1118    // for non direct outputs, only PCM is supported
1119    if (audio_is_linear_pcm(format)) {
1120        // get which output is suitable for the specified stream. The actual
1121        // routing change will happen when startOutput() will be called
1122        SortedVector<audio_io_handle_t> outputs = getOutputsForDevice(device, mOutputs);
1123
1124        // at this stage we should ignore the DIRECT flag as no direct output could be found earlier
1125        flags = (audio_output_flags_t)(flags & ~AUDIO_OUTPUT_FLAG_DIRECT);
1126        output = selectOutput(outputs, flags, format);
1127    }
1128    ALOGW_IF((output == 0), "getOutput() could not find output for stream %d, samplingRate %d,"
1129            "format %d, channels %x, flags %x", stream, samplingRate, format, channelMask, flags);
1130
1131    ALOGV("getOutput() returns output %d", output);
1132
1133    return output;
1134}
1135
1136audio_io_handle_t AudioPolicyManager::selectOutput(const SortedVector<audio_io_handle_t>& outputs,
1137                                                       audio_output_flags_t flags,
1138                                                       audio_format_t format)
1139{
1140    // select one output among several that provide a path to a particular device or set of
1141    // devices (the list was previously build by getOutputsForDevice()).
1142    // The priority is as follows:
1143    // 1: the output with the highest number of requested policy flags
1144    // 2: the primary output
1145    // 3: the first output in the list
1146
1147    if (outputs.size() == 0) {
1148        return 0;
1149    }
1150    if (outputs.size() == 1) {
1151        return outputs[0];
1152    }
1153
1154    int maxCommonFlags = 0;
1155    audio_io_handle_t outputFlags = 0;
1156    audio_io_handle_t outputPrimary = 0;
1157
1158    for (size_t i = 0; i < outputs.size(); i++) {
1159        sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(outputs[i]);
1160        if (!outputDesc->isDuplicated()) {
1161            // if a valid format is specified, skip output if not compatible
1162            if (format != AUDIO_FORMAT_INVALID) {
1163                if (outputDesc->mFlags & AUDIO_OUTPUT_FLAG_DIRECT) {
1164                    if (format != outputDesc->mFormat) {
1165                        continue;
1166                    }
1167                } else if (!audio_is_linear_pcm(format)) {
1168                    continue;
1169                }
1170            }
1171
1172            int commonFlags = popcount(outputDesc->mProfile->mFlags & flags);
1173            if (commonFlags > maxCommonFlags) {
1174                outputFlags = outputs[i];
1175                maxCommonFlags = commonFlags;
1176                ALOGV("selectOutput() commonFlags for output %d, %04x", outputs[i], commonFlags);
1177            }
1178            if (outputDesc->mProfile->mFlags & AUDIO_OUTPUT_FLAG_PRIMARY) {
1179                outputPrimary = outputs[i];
1180            }
1181        }
1182    }
1183
1184    if (outputFlags != 0) {
1185        return outputFlags;
1186    }
1187    if (outputPrimary != 0) {
1188        return outputPrimary;
1189    }
1190
1191    return outputs[0];
1192}
1193
1194status_t AudioPolicyManager::startOutput(audio_io_handle_t output,
1195                                             audio_stream_type_t stream,
1196                                             audio_session_t session)
1197{
1198    ALOGV("startOutput() output %d, stream %d, session %d", output, stream, session);
1199    ssize_t index = mOutputs.indexOfKey(output);
1200    if (index < 0) {
1201        ALOGW("startOutput() unknown output %d", output);
1202        return BAD_VALUE;
1203    }
1204
1205    // cannot start playback of STREAM_TTS if any other output is being used
1206    uint32_t beaconMuteLatency = 0;
1207    if (stream == AUDIO_STREAM_TTS) {
1208        ALOGV("\t found BEACON stream");
1209        if (isAnyOutputActive(AUDIO_STREAM_TTS /*streamToIgnore*/)) {
1210            return INVALID_OPERATION;
1211        } else {
1212            beaconMuteLatency = handleEventForBeacon(STARTING_BEACON);
1213        }
1214    } else {
1215        // some playback other than beacon starts
1216        beaconMuteLatency = handleEventForBeacon(STARTING_OUTPUT);
1217    }
1218
1219    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(index);
1220
1221    // increment usage count for this stream on the requested output:
1222    // NOTE that the usage count is the same for duplicated output and hardware output which is
1223    // necessary for a correct control of hardware output routing by startOutput() and stopOutput()
1224    outputDesc->changeRefCount(stream, 1);
1225
1226    if (outputDesc->mRefCount[stream] == 1) {
1227        // starting an output being rerouted?
1228        audio_devices_t newDevice;
1229        if (outputDesc->mPolicyMix != NULL) {
1230            newDevice = AUDIO_DEVICE_OUT_REMOTE_SUBMIX;
1231        } else {
1232            newDevice = getNewOutputDevice(output, false /*fromCache*/);
1233        }
1234        routing_strategy strategy = getStrategy(stream);
1235        bool shouldWait = (strategy == STRATEGY_SONIFICATION) ||
1236                            (strategy == STRATEGY_SONIFICATION_RESPECTFUL) ||
1237                            (beaconMuteLatency > 0);
1238        uint32_t waitMs = beaconMuteLatency;
1239        bool force = false;
1240        for (size_t i = 0; i < mOutputs.size(); i++) {
1241            sp<AudioOutputDescriptor> desc = mOutputs.valueAt(i);
1242            if (desc != outputDesc) {
1243                // force a device change if any other output is managed by the same hw
1244                // module and has a current device selection that differs from selected device.
1245                // In this case, the audio HAL must receive the new device selection so that it can
1246                // change the device currently selected by the other active output.
1247                if (outputDesc->sharesHwModuleWith(desc) &&
1248                    desc->device() != newDevice) {
1249                    force = true;
1250                }
1251                // wait for audio on other active outputs to be presented when starting
1252                // a notification so that audio focus effect can propagate, or that a mute/unmute
1253                // event occurred for beacon
1254                uint32_t latency = desc->latency();
1255                if (shouldWait && desc->isActive(latency * 2) && (waitMs < latency)) {
1256                    waitMs = latency;
1257                }
1258            }
1259        }
1260        uint32_t muteWaitMs = setOutputDevice(output, newDevice, force);
1261
1262        // handle special case for sonification while in call
1263        if (isInCall()) {
1264            handleIncallSonification(stream, true, false);
1265        }
1266
1267        // apply volume rules for current stream and device if necessary
1268        checkAndSetVolume(stream,
1269                          mStreams[stream].getVolumeIndex(newDevice),
1270                          output,
1271                          newDevice);
1272
1273        // update the outputs if starting an output with a stream that can affect notification
1274        // routing
1275        handleNotificationRoutingForStream(stream);
1276
1277        // Automatically enable the remote submix input when output is started on a re routing mix
1278        // of type MIX_TYPE_RECORDERS
1279        if (audio_is_remote_submix_device(newDevice) && outputDesc->mPolicyMix != NULL &&
1280                outputDesc->mPolicyMix->mMixType == MIX_TYPE_RECORDERS) {
1281                setDeviceConnectionState(AUDIO_DEVICE_IN_REMOTE_SUBMIX,
1282                        AUDIO_POLICY_DEVICE_STATE_AVAILABLE,
1283                        outputDesc->mPolicyMix->mRegistrationId);
1284        }
1285
1286        if (waitMs > muteWaitMs) {
1287            usleep((waitMs - muteWaitMs) * 2 * 1000);
1288        }
1289    }
1290    return NO_ERROR;
1291}
1292
1293
1294status_t AudioPolicyManager::stopOutput(audio_io_handle_t output,
1295                                            audio_stream_type_t stream,
1296                                            audio_session_t session)
1297{
1298    ALOGV("stopOutput() output %d, stream %d, session %d", output, stream, session);
1299    ssize_t index = mOutputs.indexOfKey(output);
1300    if (index < 0) {
1301        ALOGW("stopOutput() unknown output %d", output);
1302        return BAD_VALUE;
1303    }
1304
1305    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(index);
1306
1307    // always handle stream stop, check which stream type is stopping
1308    handleEventForBeacon(stream == AUDIO_STREAM_TTS ? STOPPING_BEACON : STOPPING_OUTPUT);
1309
1310    // handle special case for sonification while in call
1311    if (isInCall()) {
1312        handleIncallSonification(stream, false, false);
1313    }
1314
1315    if (outputDesc->mRefCount[stream] > 0) {
1316        // decrement usage count of this stream on the output
1317        outputDesc->changeRefCount(stream, -1);
1318        // store time at which the stream was stopped - see isStreamActive()
1319        if (outputDesc->mRefCount[stream] == 0) {
1320            // Automatically disable the remote submix input when output is stopped on a
1321            // re routing mix of type MIX_TYPE_RECORDERS
1322            if (audio_is_remote_submix_device(outputDesc->mDevice) &&
1323                    outputDesc->mPolicyMix != NULL &&
1324                    outputDesc->mPolicyMix->mMixType == MIX_TYPE_RECORDERS) {
1325                setDeviceConnectionState(AUDIO_DEVICE_IN_REMOTE_SUBMIX,
1326                        AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE,
1327                        outputDesc->mPolicyMix->mRegistrationId);
1328            }
1329
1330            outputDesc->mStopTime[stream] = systemTime();
1331            audio_devices_t newDevice = getNewOutputDevice(output, false /*fromCache*/);
1332            // delay the device switch by twice the latency because stopOutput() is executed when
1333            // the track stop() command is received and at that time the audio track buffer can
1334            // still contain data that needs to be drained. The latency only covers the audio HAL
1335            // and kernel buffers. Also the latency does not always include additional delay in the
1336            // audio path (audio DSP, CODEC ...)
1337            setOutputDevice(output, newDevice, false, outputDesc->mLatency*2);
1338
1339            // force restoring the device selection on other active outputs if it differs from the
1340            // one being selected for this output
1341            for (size_t i = 0; i < mOutputs.size(); i++) {
1342                audio_io_handle_t curOutput = mOutputs.keyAt(i);
1343                sp<AudioOutputDescriptor> desc = mOutputs.valueAt(i);
1344                if (curOutput != output &&
1345                        desc->isActive() &&
1346                        outputDesc->sharesHwModuleWith(desc) &&
1347                        (newDevice != desc->device())) {
1348                    setOutputDevice(curOutput,
1349                                    getNewOutputDevice(curOutput, false /*fromCache*/),
1350                                    true,
1351                                    outputDesc->mLatency*2);
1352                }
1353            }
1354            // update the outputs if stopping one with a stream that can affect notification routing
1355            handleNotificationRoutingForStream(stream);
1356        }
1357        return NO_ERROR;
1358    } else {
1359        ALOGW("stopOutput() refcount is already 0 for output %d", output);
1360        return INVALID_OPERATION;
1361    }
1362}
1363
1364void AudioPolicyManager::releaseOutput(audio_io_handle_t output,
1365                                       audio_stream_type_t stream __unused,
1366                                       audio_session_t session __unused)
1367{
1368    ALOGV("releaseOutput() %d", output);
1369    ssize_t index = mOutputs.indexOfKey(output);
1370    if (index < 0) {
1371        ALOGW("releaseOutput() releasing unknown output %d", output);
1372        return;
1373    }
1374
1375#ifdef AUDIO_POLICY_TEST
1376    int testIndex = testOutputIndex(output);
1377    if (testIndex != 0) {
1378        sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(index);
1379        if (outputDesc->isActive()) {
1380            mpClientInterface->closeOutput(output);
1381            mOutputs.removeItem(output);
1382            mTestOutputs[testIndex] = 0;
1383        }
1384        return;
1385    }
1386#endif //AUDIO_POLICY_TEST
1387
1388    sp<AudioOutputDescriptor> desc = mOutputs.valueAt(index);
1389    if (desc->mFlags & AUDIO_OUTPUT_FLAG_DIRECT) {
1390        if (desc->mDirectOpenCount <= 0) {
1391            ALOGW("releaseOutput() invalid open count %d for output %d",
1392                                                              desc->mDirectOpenCount, output);
1393            return;
1394        }
1395        if (--desc->mDirectOpenCount == 0) {
1396            closeOutput(output);
1397            // If effects where present on the output, audioflinger moved them to the primary
1398            // output by default: move them back to the appropriate output.
1399            audio_io_handle_t dstOutput = getOutputForEffect();
1400            if (dstOutput != mPrimaryOutput) {
1401                mpClientInterface->moveEffects(AUDIO_SESSION_OUTPUT_MIX, mPrimaryOutput, dstOutput);
1402            }
1403            mpClientInterface->onAudioPortListUpdate();
1404        }
1405    }
1406}
1407
1408
1409status_t AudioPolicyManager::getInputForAttr(const audio_attributes_t *attr,
1410                                             audio_io_handle_t *input,
1411                                             audio_session_t session,
1412                                             uint32_t samplingRate,
1413                                             audio_format_t format,
1414                                             audio_channel_mask_t channelMask,
1415                                             audio_input_flags_t flags)
1416{
1417    ALOGV("getInputForAttr() source %d, samplingRate %d, format %d, channelMask %x,"
1418            "session %d, flags %#x",
1419          attr->source, samplingRate, format, channelMask, session, flags);
1420
1421    *input = AUDIO_IO_HANDLE_NONE;
1422    audio_devices_t device;
1423    // handle legacy remote submix case where the address was not always specified
1424    String8 address = String8("");
1425    bool isSoundTrigger = false;
1426    audio_source_t halInputSource = attr->source;
1427    AudioMix *policyMix = NULL;
1428
1429    if (attr->source == AUDIO_SOURCE_REMOTE_SUBMIX &&
1430            strncmp(attr->tags, "addr=", strlen("addr=")) == 0) {
1431        device = AUDIO_DEVICE_IN_REMOTE_SUBMIX;
1432        address = String8(attr->tags + strlen("addr="));
1433        ssize_t index = mPolicyMixes.indexOfKey(address);
1434        if (index < 0) {
1435            ALOGW("getInputForAttr() no policy for address %s", address.string());
1436            return BAD_VALUE;
1437        }
1438        if (mPolicyMixes[index]->mMix.mMixType != MIX_TYPE_PLAYERS) {
1439            ALOGW("getInputForAttr() bad policy mix type for address %s", address.string());
1440            return BAD_VALUE;
1441        }
1442        policyMix = &mPolicyMixes[index]->mMix;
1443    } else {
1444        device = getDeviceForInputSource(attr->source, &policyMix);
1445        if (device == AUDIO_DEVICE_NONE) {
1446            ALOGW("getInputForAttr() could not find device for source %d", attr->source);
1447            return BAD_VALUE;
1448        }
1449        if (policyMix != NULL) {
1450            address = policyMix->mRegistrationId;
1451        } else if (audio_is_remote_submix_device(device)) {
1452            address = String8("0");
1453        }
1454        // adapt channel selection to input source
1455        switch (attr->source) {
1456        case AUDIO_SOURCE_VOICE_UPLINK:
1457            channelMask = AUDIO_CHANNEL_IN_VOICE_UPLINK;
1458            break;
1459        case AUDIO_SOURCE_VOICE_DOWNLINK:
1460            channelMask = AUDIO_CHANNEL_IN_VOICE_DNLINK;
1461            break;
1462        case AUDIO_SOURCE_VOICE_CALL:
1463            channelMask = AUDIO_CHANNEL_IN_VOICE_UPLINK | AUDIO_CHANNEL_IN_VOICE_DNLINK;
1464            break;
1465        default:
1466            break;
1467        }
1468        if (attr->source == AUDIO_SOURCE_HOTWORD) {
1469            ssize_t index = mSoundTriggerSessions.indexOfKey(session);
1470            if (index >= 0) {
1471                *input = mSoundTriggerSessions.valueFor(session);
1472                isSoundTrigger = true;
1473                flags = (audio_input_flags_t)(flags | AUDIO_INPUT_FLAG_HW_HOTWORD);
1474                ALOGV("SoundTrigger capture on session %d input %d", session, *input);
1475            } else {
1476                halInputSource = AUDIO_SOURCE_VOICE_RECOGNITION;
1477            }
1478        }
1479    }
1480
1481    sp<IOProfile> profile = getInputProfile(device, address,
1482                                            samplingRate, format, channelMask,
1483                                            flags);
1484    if (profile == 0) {
1485        //retry without flags
1486        audio_input_flags_t log_flags = flags;
1487        flags = AUDIO_INPUT_FLAG_NONE;
1488        profile = getInputProfile(device, address,
1489                                  samplingRate, format, channelMask,
1490                                  flags);
1491        if (profile == 0) {
1492            ALOGW("getInputForAttr() could not find profile for device 0x%X, samplingRate %u,"
1493                    "format %#x, channelMask 0x%X, flags %#x",
1494                    device, samplingRate, format, channelMask, log_flags);
1495            return BAD_VALUE;
1496        }
1497    }
1498
1499    if (profile->mModule->mHandle == 0) {
1500        ALOGE("getInputForAttr(): HW module %s not opened", profile->mModule->mName);
1501        return NO_INIT;
1502    }
1503
1504    audio_config_t config = AUDIO_CONFIG_INITIALIZER;
1505    config.sample_rate = samplingRate;
1506    config.channel_mask = channelMask;
1507    config.format = format;
1508
1509    status_t status = mpClientInterface->openInput(profile->mModule->mHandle,
1510                                                   input,
1511                                                   &config,
1512                                                   &device,
1513                                                   address,
1514                                                   halInputSource,
1515                                                   flags);
1516
1517    // only accept input with the exact requested set of parameters
1518    if (status != NO_ERROR || *input == AUDIO_IO_HANDLE_NONE ||
1519        (samplingRate != config.sample_rate) ||
1520        (format != config.format) ||
1521        (channelMask != config.channel_mask)) {
1522        ALOGW("getInputForAttr() failed opening input: samplingRate %d, format %d, channelMask %x",
1523                samplingRate, format, channelMask);
1524        if (*input != AUDIO_IO_HANDLE_NONE) {
1525            mpClientInterface->closeInput(*input);
1526        }
1527        return BAD_VALUE;
1528    }
1529
1530    sp<AudioInputDescriptor> inputDesc = new AudioInputDescriptor(profile);
1531    inputDesc->mInputSource = attr->source;
1532    inputDesc->mRefCount = 0;
1533    inputDesc->mOpenRefCount = 1;
1534    inputDesc->mSamplingRate = samplingRate;
1535    inputDesc->mFormat = format;
1536    inputDesc->mChannelMask = channelMask;
1537    inputDesc->mDevice = device;
1538    inputDesc->mSessions.add(session);
1539    inputDesc->mIsSoundTrigger = isSoundTrigger;
1540    inputDesc->mPolicyMix = policyMix;
1541
1542    addInput(*input, inputDesc);
1543    mpClientInterface->onAudioPortListUpdate();
1544    return NO_ERROR;
1545}
1546
1547status_t AudioPolicyManager::startInput(audio_io_handle_t input,
1548                                        audio_session_t session)
1549{
1550    ALOGV("startInput() input %d", input);
1551    ssize_t index = mInputs.indexOfKey(input);
1552    if (index < 0) {
1553        ALOGW("startInput() unknown input %d", input);
1554        return BAD_VALUE;
1555    }
1556    sp<AudioInputDescriptor> inputDesc = mInputs.valueAt(index);
1557
1558    index = inputDesc->mSessions.indexOf(session);
1559    if (index < 0) {
1560        ALOGW("startInput() unknown session %d on input %d", session, input);
1561        return BAD_VALUE;
1562    }
1563
1564    // virtual input devices are compatible with other input devices
1565    if (!isVirtualInputDevice(inputDesc->mDevice)) {
1566
1567        // for a non-virtual input device, check if there is another (non-virtual) active input
1568        audio_io_handle_t activeInput = getActiveInput();
1569        if (activeInput != 0 && activeInput != input) {
1570
1571            // If the already active input uses AUDIO_SOURCE_HOTWORD then it is closed,
1572            // otherwise the active input continues and the new input cannot be started.
1573            sp<AudioInputDescriptor> activeDesc = mInputs.valueFor(activeInput);
1574            if (activeDesc->mInputSource == AUDIO_SOURCE_HOTWORD) {
1575                ALOGW("startInput(%d) preempting low-priority input %d", input, activeInput);
1576                stopInput(activeInput, activeDesc->mSessions.itemAt(0));
1577                releaseInput(activeInput, activeDesc->mSessions.itemAt(0));
1578            } else {
1579                ALOGE("startInput(%d) failed: other input %d already started", input, activeInput);
1580                return INVALID_OPERATION;
1581            }
1582        }
1583    }
1584
1585    if (inputDesc->mRefCount == 0) {
1586        if (activeInputsCount() == 0) {
1587            SoundTrigger::setCaptureState(true);
1588        }
1589        setInputDevice(input, getNewInputDevice(input), true /* force */);
1590
1591        // automatically enable the remote submix output when input is started if not
1592        // used by a policy mix of type MIX_TYPE_RECORDERS
1593        // For remote submix (a virtual device), we open only one input per capture request.
1594        if (audio_is_remote_submix_device(inputDesc->mDevice)) {
1595            String8 address = String8("");
1596            if (inputDesc->mPolicyMix == NULL) {
1597                address = String8("0");
1598            } else if (inputDesc->mPolicyMix->mMixType == MIX_TYPE_PLAYERS) {
1599                address = inputDesc->mPolicyMix->mRegistrationId;
1600            }
1601            if (address != "") {
1602                setDeviceConnectionState(AUDIO_DEVICE_OUT_REMOTE_SUBMIX,
1603                        AUDIO_POLICY_DEVICE_STATE_AVAILABLE,
1604                        address);
1605            }
1606        }
1607    }
1608
1609    ALOGV("AudioPolicyManager::startInput() input source = %d", inputDesc->mInputSource);
1610
1611    inputDesc->mRefCount++;
1612    return NO_ERROR;
1613}
1614
1615status_t AudioPolicyManager::stopInput(audio_io_handle_t input,
1616                                       audio_session_t session)
1617{
1618    ALOGV("stopInput() input %d", input);
1619    ssize_t index = mInputs.indexOfKey(input);
1620    if (index < 0) {
1621        ALOGW("stopInput() unknown input %d", input);
1622        return BAD_VALUE;
1623    }
1624    sp<AudioInputDescriptor> inputDesc = mInputs.valueAt(index);
1625
1626    index = inputDesc->mSessions.indexOf(session);
1627    if (index < 0) {
1628        ALOGW("stopInput() unknown session %d on input %d", session, input);
1629        return BAD_VALUE;
1630    }
1631
1632    if (inputDesc->mRefCount == 0) {
1633        ALOGW("stopInput() input %d already stopped", input);
1634        return INVALID_OPERATION;
1635    }
1636
1637    inputDesc->mRefCount--;
1638    if (inputDesc->mRefCount == 0) {
1639
1640        // automatically disable the remote submix output when input is stopped if not
1641        // used by a policy mix of type MIX_TYPE_RECORDERS
1642        if (audio_is_remote_submix_device(inputDesc->mDevice)) {
1643            String8 address = String8("");
1644            if (inputDesc->mPolicyMix == NULL) {
1645                address = String8("0");
1646            } else if (inputDesc->mPolicyMix->mMixType == MIX_TYPE_PLAYERS) {
1647                address = inputDesc->mPolicyMix->mRegistrationId;
1648            }
1649            if (address != "") {
1650                setDeviceConnectionState(AUDIO_DEVICE_OUT_REMOTE_SUBMIX,
1651                                         AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE,
1652                                         address);
1653            }
1654        }
1655
1656        resetInputDevice(input);
1657
1658        if (activeInputsCount() == 0) {
1659            SoundTrigger::setCaptureState(false);
1660        }
1661    }
1662    return NO_ERROR;
1663}
1664
1665void AudioPolicyManager::releaseInput(audio_io_handle_t input,
1666                                      audio_session_t session)
1667{
1668    ALOGV("releaseInput() %d", input);
1669    ssize_t index = mInputs.indexOfKey(input);
1670    if (index < 0) {
1671        ALOGW("releaseInput() releasing unknown input %d", input);
1672        return;
1673    }
1674    sp<AudioInputDescriptor> inputDesc = mInputs.valueAt(index);
1675    ALOG_ASSERT(inputDesc != 0);
1676
1677    index = inputDesc->mSessions.indexOf(session);
1678    if (index < 0) {
1679        ALOGW("releaseInput() unknown session %d on input %d", session, input);
1680        return;
1681    }
1682    inputDesc->mSessions.remove(session);
1683    if (inputDesc->mOpenRefCount == 0) {
1684        ALOGW("releaseInput() invalid open ref count %d", inputDesc->mOpenRefCount);
1685        return;
1686    }
1687    inputDesc->mOpenRefCount--;
1688    if (inputDesc->mOpenRefCount > 0) {
1689        ALOGV("releaseInput() exit > 0");
1690        return;
1691    }
1692
1693    closeInput(input);
1694    mpClientInterface->onAudioPortListUpdate();
1695    ALOGV("releaseInput() exit");
1696}
1697
1698void AudioPolicyManager::closeAllInputs() {
1699    bool patchRemoved = false;
1700
1701    for(size_t input_index = 0; input_index < mInputs.size(); input_index++) {
1702        sp<AudioInputDescriptor> inputDesc = mInputs.valueAt(input_index);
1703        ssize_t patch_index = mAudioPatches.indexOfKey(inputDesc->mPatchHandle);
1704        if (patch_index >= 0) {
1705            sp<AudioPatch> patchDesc = mAudioPatches.valueAt(patch_index);
1706            status_t status = mpClientInterface->releaseAudioPatch(patchDesc->mAfPatchHandle, 0);
1707            mAudioPatches.removeItemsAt(patch_index);
1708            patchRemoved = true;
1709        }
1710        mpClientInterface->closeInput(mInputs.keyAt(input_index));
1711    }
1712    mInputs.clear();
1713    nextAudioPortGeneration();
1714
1715    if (patchRemoved) {
1716        mpClientInterface->onAudioPatchListUpdate();
1717    }
1718}
1719
1720void AudioPolicyManager::initStreamVolume(audio_stream_type_t stream,
1721                                            int indexMin,
1722                                            int indexMax)
1723{
1724    ALOGV("initStreamVolume() stream %d, min %d, max %d", stream , indexMin, indexMax);
1725    if (indexMin < 0 || indexMin >= indexMax) {
1726        ALOGW("initStreamVolume() invalid index limits for stream %d, min %d, max %d", stream , indexMin, indexMax);
1727        return;
1728    }
1729    mStreams[stream].mIndexMin = indexMin;
1730    mStreams[stream].mIndexMax = indexMax;
1731    //FIXME: AUDIO_STREAM_ACCESSIBILITY volume follows AUDIO_STREAM_MUSIC for now
1732    if (stream == AUDIO_STREAM_MUSIC) {
1733        mStreams[AUDIO_STREAM_ACCESSIBILITY].mIndexMin = indexMin;
1734        mStreams[AUDIO_STREAM_ACCESSIBILITY].mIndexMax = indexMax;
1735    }
1736}
1737
1738status_t AudioPolicyManager::setStreamVolumeIndex(audio_stream_type_t stream,
1739                                                      int index,
1740                                                      audio_devices_t device)
1741{
1742
1743    if ((index < mStreams[stream].mIndexMin) || (index > mStreams[stream].mIndexMax)) {
1744        return BAD_VALUE;
1745    }
1746    if (!audio_is_output_device(device)) {
1747        return BAD_VALUE;
1748    }
1749
1750    // Force max volume if stream cannot be muted
1751    if (!mStreams[stream].mCanBeMuted) index = mStreams[stream].mIndexMax;
1752
1753    ALOGV("setStreamVolumeIndex() stream %d, device %04x, index %d",
1754          stream, device, index);
1755
1756    // if device is AUDIO_DEVICE_OUT_DEFAULT set default value and
1757    // clear all device specific values
1758    if (device == AUDIO_DEVICE_OUT_DEFAULT) {
1759        mStreams[stream].mIndexCur.clear();
1760    }
1761    mStreams[stream].mIndexCur.add(device, index);
1762
1763    // update volume on all outputs whose current device is also selected by the same
1764    // strategy as the device specified by the caller
1765    audio_devices_t strategyDevice = getDeviceForStrategy(getStrategy(stream), true /*fromCache*/);
1766
1767
1768    //FIXME: AUDIO_STREAM_ACCESSIBILITY volume follows AUDIO_STREAM_MUSIC for now
1769    audio_devices_t accessibilityDevice = AUDIO_DEVICE_NONE;
1770    if (stream == AUDIO_STREAM_MUSIC) {
1771        mStreams[AUDIO_STREAM_ACCESSIBILITY].mIndexCur.add(device, index);
1772        accessibilityDevice = getDeviceForStrategy(STRATEGY_ACCESSIBILITY, true /*fromCache*/);
1773    }
1774    if ((device != AUDIO_DEVICE_OUT_DEFAULT) &&
1775            (device & (strategyDevice | accessibilityDevice)) == 0) {
1776        return NO_ERROR;
1777    }
1778    status_t status = NO_ERROR;
1779    for (size_t i = 0; i < mOutputs.size(); i++) {
1780        audio_devices_t curDevice =
1781                getDeviceForVolume(mOutputs.valueAt(i)->device());
1782        if ((device == AUDIO_DEVICE_OUT_DEFAULT) || ((curDevice & strategyDevice) != 0)) {
1783            status_t volStatus = checkAndSetVolume(stream, index, mOutputs.keyAt(i), curDevice);
1784            if (volStatus != NO_ERROR) {
1785                status = volStatus;
1786            }
1787        }
1788        if ((device == AUDIO_DEVICE_OUT_DEFAULT) || ((curDevice & accessibilityDevice) != 0)) {
1789            status_t volStatus = checkAndSetVolume(AUDIO_STREAM_ACCESSIBILITY,
1790                                                   index, mOutputs.keyAt(i), curDevice);
1791        }
1792    }
1793    return status;
1794}
1795
1796status_t AudioPolicyManager::getStreamVolumeIndex(audio_stream_type_t stream,
1797                                                      int *index,
1798                                                      audio_devices_t device)
1799{
1800    if (index == NULL) {
1801        return BAD_VALUE;
1802    }
1803    if (!audio_is_output_device(device)) {
1804        return BAD_VALUE;
1805    }
1806    // if device is AUDIO_DEVICE_OUT_DEFAULT, return volume for device corresponding to
1807    // the strategy the stream belongs to.
1808    if (device == AUDIO_DEVICE_OUT_DEFAULT) {
1809        device = getDeviceForStrategy(getStrategy(stream), true /*fromCache*/);
1810    }
1811    device = getDeviceForVolume(device);
1812
1813    *index =  mStreams[stream].getVolumeIndex(device);
1814    ALOGV("getStreamVolumeIndex() stream %d device %08x index %d", stream, device, *index);
1815    return NO_ERROR;
1816}
1817
1818audio_io_handle_t AudioPolicyManager::selectOutputForEffects(
1819                                            const SortedVector<audio_io_handle_t>& outputs)
1820{
1821    // select one output among several suitable for global effects.
1822    // The priority is as follows:
1823    // 1: An offloaded output. If the effect ends up not being offloadable,
1824    //    AudioFlinger will invalidate the track and the offloaded output
1825    //    will be closed causing the effect to be moved to a PCM output.
1826    // 2: A deep buffer output
1827    // 3: the first output in the list
1828
1829    if (outputs.size() == 0) {
1830        return 0;
1831    }
1832
1833    audio_io_handle_t outputOffloaded = 0;
1834    audio_io_handle_t outputDeepBuffer = 0;
1835
1836    for (size_t i = 0; i < outputs.size(); i++) {
1837        sp<AudioOutputDescriptor> desc = mOutputs.valueFor(outputs[i]);
1838        ALOGV("selectOutputForEffects outputs[%zu] flags %x", i, desc->mFlags);
1839        if ((desc->mFlags & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) != 0) {
1840            outputOffloaded = outputs[i];
1841        }
1842        if ((desc->mFlags & AUDIO_OUTPUT_FLAG_DEEP_BUFFER) != 0) {
1843            outputDeepBuffer = outputs[i];
1844        }
1845    }
1846
1847    ALOGV("selectOutputForEffects outputOffloaded %d outputDeepBuffer %d",
1848          outputOffloaded, outputDeepBuffer);
1849    if (outputOffloaded != 0) {
1850        return outputOffloaded;
1851    }
1852    if (outputDeepBuffer != 0) {
1853        return outputDeepBuffer;
1854    }
1855
1856    return outputs[0];
1857}
1858
1859audio_io_handle_t AudioPolicyManager::getOutputForEffect(const effect_descriptor_t *desc)
1860{
1861    // apply simple rule where global effects are attached to the same output as MUSIC streams
1862
1863    routing_strategy strategy = getStrategy(AUDIO_STREAM_MUSIC);
1864    audio_devices_t device = getDeviceForStrategy(strategy, false /*fromCache*/);
1865    SortedVector<audio_io_handle_t> dstOutputs = getOutputsForDevice(device, mOutputs);
1866
1867    audio_io_handle_t output = selectOutputForEffects(dstOutputs);
1868    ALOGV("getOutputForEffect() got output %d for fx %s flags %x",
1869          output, (desc == NULL) ? "unspecified" : desc->name,  (desc == NULL) ? 0 : desc->flags);
1870
1871    return output;
1872}
1873
1874status_t AudioPolicyManager::registerEffect(const effect_descriptor_t *desc,
1875                                audio_io_handle_t io,
1876                                uint32_t strategy,
1877                                int session,
1878                                int id)
1879{
1880    ssize_t index = mOutputs.indexOfKey(io);
1881    if (index < 0) {
1882        index = mInputs.indexOfKey(io);
1883        if (index < 0) {
1884            ALOGW("registerEffect() unknown io %d", io);
1885            return INVALID_OPERATION;
1886        }
1887    }
1888
1889    if (mTotalEffectsMemory + desc->memoryUsage > getMaxEffectsMemory()) {
1890        ALOGW("registerEffect() memory limit exceeded for Fx %s, Memory %d KB",
1891                desc->name, desc->memoryUsage);
1892        return INVALID_OPERATION;
1893    }
1894    mTotalEffectsMemory += desc->memoryUsage;
1895    ALOGV("registerEffect() effect %s, io %d, strategy %d session %d id %d",
1896            desc->name, io, strategy, session, id);
1897    ALOGV("registerEffect() memory %d, total memory %d", desc->memoryUsage, mTotalEffectsMemory);
1898
1899    sp<EffectDescriptor> effectDesc = new EffectDescriptor();
1900    memcpy (&effectDesc->mDesc, desc, sizeof(effect_descriptor_t));
1901    effectDesc->mIo = io;
1902    effectDesc->mStrategy = (routing_strategy)strategy;
1903    effectDesc->mSession = session;
1904    effectDesc->mEnabled = false;
1905
1906    mEffects.add(id, effectDesc);
1907
1908    return NO_ERROR;
1909}
1910
1911status_t AudioPolicyManager::unregisterEffect(int id)
1912{
1913    ssize_t index = mEffects.indexOfKey(id);
1914    if (index < 0) {
1915        ALOGW("unregisterEffect() unknown effect ID %d", id);
1916        return INVALID_OPERATION;
1917    }
1918
1919    sp<EffectDescriptor> effectDesc = mEffects.valueAt(index);
1920
1921    setEffectEnabled(effectDesc, false);
1922
1923    if (mTotalEffectsMemory < effectDesc->mDesc.memoryUsage) {
1924        ALOGW("unregisterEffect() memory %d too big for total %d",
1925                effectDesc->mDesc.memoryUsage, mTotalEffectsMemory);
1926        effectDesc->mDesc.memoryUsage = mTotalEffectsMemory;
1927    }
1928    mTotalEffectsMemory -= effectDesc->mDesc.memoryUsage;
1929    ALOGV("unregisterEffect() effect %s, ID %d, memory %d total memory %d",
1930            effectDesc->mDesc.name, id, effectDesc->mDesc.memoryUsage, mTotalEffectsMemory);
1931
1932    mEffects.removeItem(id);
1933
1934    return NO_ERROR;
1935}
1936
1937status_t AudioPolicyManager::setEffectEnabled(int id, bool enabled)
1938{
1939    ssize_t index = mEffects.indexOfKey(id);
1940    if (index < 0) {
1941        ALOGW("unregisterEffect() unknown effect ID %d", id);
1942        return INVALID_OPERATION;
1943    }
1944
1945    return setEffectEnabled(mEffects.valueAt(index), enabled);
1946}
1947
1948status_t AudioPolicyManager::setEffectEnabled(const sp<EffectDescriptor>& effectDesc, bool enabled)
1949{
1950    if (enabled == effectDesc->mEnabled) {
1951        ALOGV("setEffectEnabled(%s) effect already %s",
1952             enabled?"true":"false", enabled?"enabled":"disabled");
1953        return INVALID_OPERATION;
1954    }
1955
1956    if (enabled) {
1957        if (mTotalEffectsCpuLoad + effectDesc->mDesc.cpuLoad > getMaxEffectsCpuLoad()) {
1958            ALOGW("setEffectEnabled(true) CPU Load limit exceeded for Fx %s, CPU %f MIPS",
1959                 effectDesc->mDesc.name, (float)effectDesc->mDesc.cpuLoad/10);
1960            return INVALID_OPERATION;
1961        }
1962        mTotalEffectsCpuLoad += effectDesc->mDesc.cpuLoad;
1963        ALOGV("setEffectEnabled(true) total CPU %d", mTotalEffectsCpuLoad);
1964    } else {
1965        if (mTotalEffectsCpuLoad < effectDesc->mDesc.cpuLoad) {
1966            ALOGW("setEffectEnabled(false) CPU load %d too high for total %d",
1967                    effectDesc->mDesc.cpuLoad, mTotalEffectsCpuLoad);
1968            effectDesc->mDesc.cpuLoad = mTotalEffectsCpuLoad;
1969        }
1970        mTotalEffectsCpuLoad -= effectDesc->mDesc.cpuLoad;
1971        ALOGV("setEffectEnabled(false) total CPU %d", mTotalEffectsCpuLoad);
1972    }
1973    effectDesc->mEnabled = enabled;
1974    return NO_ERROR;
1975}
1976
1977bool AudioPolicyManager::isNonOffloadableEffectEnabled()
1978{
1979    for (size_t i = 0; i < mEffects.size(); i++) {
1980        sp<EffectDescriptor> effectDesc = mEffects.valueAt(i);
1981        if (effectDesc->mEnabled && (effectDesc->mStrategy == STRATEGY_MEDIA) &&
1982                ((effectDesc->mDesc.flags & EFFECT_FLAG_OFFLOAD_SUPPORTED) == 0)) {
1983            ALOGV("isNonOffloadableEffectEnabled() non offloadable effect %s enabled on session %d",
1984                  effectDesc->mDesc.name, effectDesc->mSession);
1985            return true;
1986        }
1987    }
1988    return false;
1989}
1990
1991bool AudioPolicyManager::isStreamActive(audio_stream_type_t stream, uint32_t inPastMs) const
1992{
1993    nsecs_t sysTime = systemTime();
1994    for (size_t i = 0; i < mOutputs.size(); i++) {
1995        const sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(i);
1996        if (outputDesc->isStreamActive(stream, inPastMs, sysTime)) {
1997            return true;
1998        }
1999    }
2000    return false;
2001}
2002
2003bool AudioPolicyManager::isStreamActiveRemotely(audio_stream_type_t stream,
2004                                                    uint32_t inPastMs) const
2005{
2006    nsecs_t sysTime = systemTime();
2007    for (size_t i = 0; i < mOutputs.size(); i++) {
2008        const sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(i);
2009        if (((outputDesc->device() & APM_AUDIO_OUT_DEVICE_REMOTE_ALL) != 0) &&
2010                outputDesc->isStreamActive(stream, inPastMs, sysTime)) {
2011            // do not consider re routing (when the output is going to a dynamic policy)
2012            // as "remote playback"
2013            if (outputDesc->mPolicyMix == NULL) {
2014                return true;
2015            }
2016        }
2017    }
2018    return false;
2019}
2020
2021bool AudioPolicyManager::isSourceActive(audio_source_t source) const
2022{
2023    for (size_t i = 0; i < mInputs.size(); i++) {
2024        const sp<AudioInputDescriptor>  inputDescriptor = mInputs.valueAt(i);
2025        if ((inputDescriptor->mInputSource == (int)source ||
2026                (source == AUDIO_SOURCE_VOICE_RECOGNITION &&
2027                 inputDescriptor->mInputSource == AUDIO_SOURCE_HOTWORD))
2028             && (inputDescriptor->mRefCount > 0)) {
2029            return true;
2030        }
2031    }
2032    return false;
2033}
2034
2035// Register a list of custom mixes with their attributes and format.
2036// When a mix is registered, corresponding input and output profiles are
2037// added to the remote submix hw module. The profile contains only the
2038// parameters (sampling rate, format...) specified by the mix.
2039// The corresponding input remote submix device is also connected.
2040//
2041// When a remote submix device is connected, the address is checked to select the
2042// appropriate profile and the corresponding input or output stream is opened.
2043//
2044// When capture starts, getInputForAttr() will:
2045//  - 1 look for a mix matching the address passed in attribtutes tags if any
2046//  - 2 if none found, getDeviceForInputSource() will:
2047//     - 2.1 look for a mix matching the attributes source
2048//     - 2.2 if none found, default to device selection by policy rules
2049// At this time, the corresponding output remote submix device is also connected
2050// and active playback use cases can be transferred to this mix if needed when reconnecting
2051// after AudioTracks are invalidated
2052//
2053// When playback starts, getOutputForAttr() will:
2054//  - 1 look for a mix matching the address passed in attribtutes tags if any
2055//  - 2 if none found, look for a mix matching the attributes usage
2056//  - 3 if none found, default to device and output selection by policy rules.
2057
2058status_t AudioPolicyManager::registerPolicyMixes(Vector<AudioMix> mixes)
2059{
2060    sp<HwModule> module;
2061    for (size_t i = 0; i < mHwModules.size(); i++) {
2062        if (strcmp(AUDIO_HARDWARE_MODULE_ID_REMOTE_SUBMIX, mHwModules[i]->mName) == 0 &&
2063                mHwModules[i]->mHandle != 0) {
2064            module = mHwModules[i];
2065            break;
2066        }
2067    }
2068
2069    if (module == 0) {
2070        return INVALID_OPERATION;
2071    }
2072
2073    ALOGV("registerPolicyMixes() num mixes %d", mixes.size());
2074
2075    for (size_t i = 0; i < mixes.size(); i++) {
2076        String8 address = mixes[i].mRegistrationId;
2077        ssize_t index = mPolicyMixes.indexOfKey(address);
2078        if (index >= 0) {
2079            ALOGE("registerPolicyMixes(): mix for address %s already registered", address.string());
2080            continue;
2081        }
2082        audio_config_t outputConfig = mixes[i].mFormat;
2083        audio_config_t inputConfig = mixes[i].mFormat;
2084        // NOTE: audio flinger mixer does not support mono output: configure remote submix HAL in
2085        // stereo and let audio flinger do the channel conversion if needed.
2086        outputConfig.channel_mask = AUDIO_CHANNEL_OUT_STEREO;
2087        inputConfig.channel_mask = AUDIO_CHANNEL_IN_STEREO;
2088        module->addOutputProfile(address, &outputConfig,
2089                                 AUDIO_DEVICE_OUT_REMOTE_SUBMIX, address);
2090        module->addInputProfile(address, &inputConfig,
2091                                 AUDIO_DEVICE_IN_REMOTE_SUBMIX, address);
2092        sp<AudioPolicyMix> policyMix = new AudioPolicyMix();
2093        policyMix->mMix = mixes[i];
2094        mPolicyMixes.add(address, policyMix);
2095        if (mixes[i].mMixType == MIX_TYPE_PLAYERS) {
2096            setDeviceConnectionState(AUDIO_DEVICE_IN_REMOTE_SUBMIX,
2097                                     AUDIO_POLICY_DEVICE_STATE_AVAILABLE,
2098                                     address.string());
2099        } else {
2100            setDeviceConnectionState(AUDIO_DEVICE_OUT_REMOTE_SUBMIX,
2101                                     AUDIO_POLICY_DEVICE_STATE_AVAILABLE,
2102                                     address.string());
2103        }
2104    }
2105    return NO_ERROR;
2106}
2107
2108status_t AudioPolicyManager::unregisterPolicyMixes(Vector<AudioMix> mixes)
2109{
2110    sp<HwModule> module;
2111    for (size_t i = 0; i < mHwModules.size(); i++) {
2112        if (strcmp(AUDIO_HARDWARE_MODULE_ID_REMOTE_SUBMIX, mHwModules[i]->mName) == 0 &&
2113                mHwModules[i]->mHandle != 0) {
2114            module = mHwModules[i];
2115            break;
2116        }
2117    }
2118
2119    if (module == 0) {
2120        return INVALID_OPERATION;
2121    }
2122
2123    ALOGV("unregisterPolicyMixes() num mixes %d", mixes.size());
2124
2125    for (size_t i = 0; i < mixes.size(); i++) {
2126        String8 address = mixes[i].mRegistrationId;
2127        ssize_t index = mPolicyMixes.indexOfKey(address);
2128        if (index < 0) {
2129            ALOGE("unregisterPolicyMixes(): mix for address %s not registered", address.string());
2130            continue;
2131        }
2132
2133        mPolicyMixes.removeItemsAt(index);
2134
2135        if (getDeviceConnectionState(AUDIO_DEVICE_IN_REMOTE_SUBMIX, address.string()) ==
2136                                             AUDIO_POLICY_DEVICE_STATE_AVAILABLE)
2137        {
2138            setDeviceConnectionState(AUDIO_DEVICE_IN_REMOTE_SUBMIX,
2139                                     AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE,
2140                                     address.string());
2141        }
2142
2143        if (getDeviceConnectionState(AUDIO_DEVICE_OUT_REMOTE_SUBMIX, address.string()) ==
2144                                             AUDIO_POLICY_DEVICE_STATE_AVAILABLE)
2145        {
2146            setDeviceConnectionState(AUDIO_DEVICE_OUT_REMOTE_SUBMIX,
2147                                     AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE,
2148                                     address.string());
2149        }
2150        module->removeOutputProfile(address);
2151        module->removeInputProfile(address);
2152    }
2153    return NO_ERROR;
2154}
2155
2156
2157status_t AudioPolicyManager::dump(int fd)
2158{
2159    const size_t SIZE = 256;
2160    char buffer[SIZE];
2161    String8 result;
2162
2163    snprintf(buffer, SIZE, "\nAudioPolicyManager Dump: %p\n", this);
2164    result.append(buffer);
2165
2166    snprintf(buffer, SIZE, " Primary Output: %d\n", mPrimaryOutput);
2167    result.append(buffer);
2168    snprintf(buffer, SIZE, " Phone state: %d\n", mPhoneState);
2169    result.append(buffer);
2170    snprintf(buffer, SIZE, " Force use for communications %d\n",
2171             mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION]);
2172    result.append(buffer);
2173    snprintf(buffer, SIZE, " Force use for media %d\n", mForceUse[AUDIO_POLICY_FORCE_FOR_MEDIA]);
2174    result.append(buffer);
2175    snprintf(buffer, SIZE, " Force use for record %d\n", mForceUse[AUDIO_POLICY_FORCE_FOR_RECORD]);
2176    result.append(buffer);
2177    snprintf(buffer, SIZE, " Force use for dock %d\n", mForceUse[AUDIO_POLICY_FORCE_FOR_DOCK]);
2178    result.append(buffer);
2179    snprintf(buffer, SIZE, " Force use for system %d\n", mForceUse[AUDIO_POLICY_FORCE_FOR_SYSTEM]);
2180    result.append(buffer);
2181    snprintf(buffer, SIZE, " Force use for hdmi system audio %d\n",
2182            mForceUse[AUDIO_POLICY_FORCE_FOR_HDMI_SYSTEM_AUDIO]);
2183    result.append(buffer);
2184
2185    snprintf(buffer, SIZE, " Available output devices:\n");
2186    result.append(buffer);
2187    write(fd, result.string(), result.size());
2188    for (size_t i = 0; i < mAvailableOutputDevices.size(); i++) {
2189        mAvailableOutputDevices[i]->dump(fd, 2, i);
2190    }
2191    snprintf(buffer, SIZE, "\n Available input devices:\n");
2192    write(fd, buffer, strlen(buffer));
2193    for (size_t i = 0; i < mAvailableInputDevices.size(); i++) {
2194        mAvailableInputDevices[i]->dump(fd, 2, i);
2195    }
2196
2197    snprintf(buffer, SIZE, "\nHW Modules dump:\n");
2198    write(fd, buffer, strlen(buffer));
2199    for (size_t i = 0; i < mHwModules.size(); i++) {
2200        snprintf(buffer, SIZE, "- HW Module %zu:\n", i + 1);
2201        write(fd, buffer, strlen(buffer));
2202        mHwModules[i]->dump(fd);
2203    }
2204
2205    snprintf(buffer, SIZE, "\nOutputs dump:\n");
2206    write(fd, buffer, strlen(buffer));
2207    for (size_t i = 0; i < mOutputs.size(); i++) {
2208        snprintf(buffer, SIZE, "- Output %d dump:\n", mOutputs.keyAt(i));
2209        write(fd, buffer, strlen(buffer));
2210        mOutputs.valueAt(i)->dump(fd);
2211    }
2212
2213    snprintf(buffer, SIZE, "\nInputs dump:\n");
2214    write(fd, buffer, strlen(buffer));
2215    for (size_t i = 0; i < mInputs.size(); i++) {
2216        snprintf(buffer, SIZE, "- Input %d dump:\n", mInputs.keyAt(i));
2217        write(fd, buffer, strlen(buffer));
2218        mInputs.valueAt(i)->dump(fd);
2219    }
2220
2221    snprintf(buffer, SIZE, "\nStreams dump:\n");
2222    write(fd, buffer, strlen(buffer));
2223    snprintf(buffer, SIZE,
2224             " Stream  Can be muted  Index Min  Index Max  Index Cur [device : index]...\n");
2225    write(fd, buffer, strlen(buffer));
2226    for (size_t i = 0; i < AUDIO_STREAM_CNT; i++) {
2227        snprintf(buffer, SIZE, " %02zu      ", i);
2228        write(fd, buffer, strlen(buffer));
2229        mStreams[i].dump(fd);
2230    }
2231
2232    snprintf(buffer, SIZE, "\nTotal Effects CPU: %f MIPS, Total Effects memory: %d KB\n",
2233            (float)mTotalEffectsCpuLoad/10, mTotalEffectsMemory);
2234    write(fd, buffer, strlen(buffer));
2235
2236    snprintf(buffer, SIZE, "Registered effects:\n");
2237    write(fd, buffer, strlen(buffer));
2238    for (size_t i = 0; i < mEffects.size(); i++) {
2239        snprintf(buffer, SIZE, "- Effect %d dump:\n", mEffects.keyAt(i));
2240        write(fd, buffer, strlen(buffer));
2241        mEffects.valueAt(i)->dump(fd);
2242    }
2243
2244    snprintf(buffer, SIZE, "\nAudio Patches:\n");
2245    write(fd, buffer, strlen(buffer));
2246    for (size_t i = 0; i < mAudioPatches.size(); i++) {
2247        mAudioPatches[i]->dump(fd, 2, i);
2248    }
2249
2250    return NO_ERROR;
2251}
2252
2253// This function checks for the parameters which can be offloaded.
2254// This can be enhanced depending on the capability of the DSP and policy
2255// of the system.
2256bool AudioPolicyManager::isOffloadSupported(const audio_offload_info_t& offloadInfo)
2257{
2258    ALOGV("isOffloadSupported: SR=%u, CM=0x%x, Format=0x%x, StreamType=%d,"
2259     " BitRate=%u, duration=%" PRId64 " us, has_video=%d",
2260     offloadInfo.sample_rate, offloadInfo.channel_mask,
2261     offloadInfo.format,
2262     offloadInfo.stream_type, offloadInfo.bit_rate, offloadInfo.duration_us,
2263     offloadInfo.has_video);
2264
2265    // Check if offload has been disabled
2266    char propValue[PROPERTY_VALUE_MAX];
2267    if (property_get("audio.offload.disable", propValue, "0")) {
2268        if (atoi(propValue) != 0) {
2269            ALOGV("offload disabled by audio.offload.disable=%s", propValue );
2270            return false;
2271        }
2272    }
2273
2274    // Check if stream type is music, then only allow offload as of now.
2275    if (offloadInfo.stream_type != AUDIO_STREAM_MUSIC)
2276    {
2277        ALOGV("isOffloadSupported: stream_type != MUSIC, returning false");
2278        return false;
2279    }
2280
2281    //TODO: enable audio offloading with video when ready
2282    if (offloadInfo.has_video)
2283    {
2284        ALOGV("isOffloadSupported: has_video == true, returning false");
2285        return false;
2286    }
2287
2288    //If duration is less than minimum value defined in property, return false
2289    if (property_get("audio.offload.min.duration.secs", propValue, NULL)) {
2290        if (offloadInfo.duration_us < (atoi(propValue) * 1000000 )) {
2291            ALOGV("Offload denied by duration < audio.offload.min.duration.secs(=%s)", propValue);
2292            return false;
2293        }
2294    } else if (offloadInfo.duration_us < OFFLOAD_DEFAULT_MIN_DURATION_SECS * 1000000) {
2295        ALOGV("Offload denied by duration < default min(=%u)", OFFLOAD_DEFAULT_MIN_DURATION_SECS);
2296        return false;
2297    }
2298
2299    // Do not allow offloading if one non offloadable effect is enabled. This prevents from
2300    // creating an offloaded track and tearing it down immediately after start when audioflinger
2301    // detects there is an active non offloadable effect.
2302    // FIXME: We should check the audio session here but we do not have it in this context.
2303    // This may prevent offloading in rare situations where effects are left active by apps
2304    // in the background.
2305    if (isNonOffloadableEffectEnabled()) {
2306        return false;
2307    }
2308
2309    // See if there is a profile to support this.
2310    // AUDIO_DEVICE_NONE
2311    sp<IOProfile> profile = getProfileForDirectOutput(AUDIO_DEVICE_NONE /*ignore device */,
2312                                            offloadInfo.sample_rate,
2313                                            offloadInfo.format,
2314                                            offloadInfo.channel_mask,
2315                                            AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD);
2316    ALOGV("isOffloadSupported() profile %sfound", profile != 0 ? "" : "NOT ");
2317    return (profile != 0);
2318}
2319
2320status_t AudioPolicyManager::listAudioPorts(audio_port_role_t role,
2321                                            audio_port_type_t type,
2322                                            unsigned int *num_ports,
2323                                            struct audio_port *ports,
2324                                            unsigned int *generation)
2325{
2326    if (num_ports == NULL || (*num_ports != 0 && ports == NULL) ||
2327            generation == NULL) {
2328        return BAD_VALUE;
2329    }
2330    ALOGV("listAudioPorts() role %d type %d num_ports %d ports %p", role, type, *num_ports, ports);
2331    if (ports == NULL) {
2332        *num_ports = 0;
2333    }
2334
2335    size_t portsWritten = 0;
2336    size_t portsMax = *num_ports;
2337    *num_ports = 0;
2338    if (type == AUDIO_PORT_TYPE_NONE || type == AUDIO_PORT_TYPE_DEVICE) {
2339        if (role == AUDIO_PORT_ROLE_SINK || role == AUDIO_PORT_ROLE_NONE) {
2340            for (size_t i = 0;
2341                    i  < mAvailableOutputDevices.size() && portsWritten < portsMax; i++) {
2342                mAvailableOutputDevices[i]->toAudioPort(&ports[portsWritten++]);
2343            }
2344            *num_ports += mAvailableOutputDevices.size();
2345        }
2346        if (role == AUDIO_PORT_ROLE_SOURCE || role == AUDIO_PORT_ROLE_NONE) {
2347            for (size_t i = 0;
2348                    i  < mAvailableInputDevices.size() && portsWritten < portsMax; i++) {
2349                mAvailableInputDevices[i]->toAudioPort(&ports[portsWritten++]);
2350            }
2351            *num_ports += mAvailableInputDevices.size();
2352        }
2353    }
2354    if (type == AUDIO_PORT_TYPE_NONE || type == AUDIO_PORT_TYPE_MIX) {
2355        if (role == AUDIO_PORT_ROLE_SINK || role == AUDIO_PORT_ROLE_NONE) {
2356            for (size_t i = 0; i < mInputs.size() && portsWritten < portsMax; i++) {
2357                mInputs[i]->toAudioPort(&ports[portsWritten++]);
2358            }
2359            *num_ports += mInputs.size();
2360        }
2361        if (role == AUDIO_PORT_ROLE_SOURCE || role == AUDIO_PORT_ROLE_NONE) {
2362            size_t numOutputs = 0;
2363            for (size_t i = 0; i < mOutputs.size(); i++) {
2364                if (!mOutputs[i]->isDuplicated()) {
2365                    numOutputs++;
2366                    if (portsWritten < portsMax) {
2367                        mOutputs[i]->toAudioPort(&ports[portsWritten++]);
2368                    }
2369                }
2370            }
2371            *num_ports += numOutputs;
2372        }
2373    }
2374    *generation = curAudioPortGeneration();
2375    ALOGV("listAudioPorts() got %zu ports needed %d", portsWritten, *num_ports);
2376    return NO_ERROR;
2377}
2378
2379status_t AudioPolicyManager::getAudioPort(struct audio_port *port __unused)
2380{
2381    return NO_ERROR;
2382}
2383
2384sp<AudioPolicyManager::AudioOutputDescriptor> AudioPolicyManager::getOutputFromId(
2385                                                                    audio_port_handle_t id) const
2386{
2387    sp<AudioOutputDescriptor> outputDesc = NULL;
2388    for (size_t i = 0; i < mOutputs.size(); i++) {
2389        outputDesc = mOutputs.valueAt(i);
2390        if (outputDesc->mId == id) {
2391            break;
2392        }
2393    }
2394    return outputDesc;
2395}
2396
2397sp<AudioPolicyManager::AudioInputDescriptor> AudioPolicyManager::getInputFromId(
2398                                                                    audio_port_handle_t id) const
2399{
2400    sp<AudioInputDescriptor> inputDesc = NULL;
2401    for (size_t i = 0; i < mInputs.size(); i++) {
2402        inputDesc = mInputs.valueAt(i);
2403        if (inputDesc->mId == id) {
2404            break;
2405        }
2406    }
2407    return inputDesc;
2408}
2409
2410sp <AudioPolicyManager::HwModule> AudioPolicyManager::getModuleForDevice(
2411                                                                    audio_devices_t device) const
2412{
2413    sp <HwModule> module;
2414
2415    for (size_t i = 0; i < mHwModules.size(); i++) {
2416        if (mHwModules[i]->mHandle == 0) {
2417            continue;
2418        }
2419        if (audio_is_output_device(device)) {
2420            for (size_t j = 0; j < mHwModules[i]->mOutputProfiles.size(); j++)
2421            {
2422                if (mHwModules[i]->mOutputProfiles[j]->mSupportedDevices.types() & device) {
2423                    return mHwModules[i];
2424                }
2425            }
2426        } else {
2427            for (size_t j = 0; j < mHwModules[i]->mInputProfiles.size(); j++) {
2428                if (mHwModules[i]->mInputProfiles[j]->mSupportedDevices.types() &
2429                        device & ~AUDIO_DEVICE_BIT_IN) {
2430                    return mHwModules[i];
2431                }
2432            }
2433        }
2434    }
2435    return module;
2436}
2437
2438sp <AudioPolicyManager::HwModule> AudioPolicyManager::getModuleFromName(const char *name) const
2439{
2440    sp <HwModule> module;
2441
2442    for (size_t i = 0; i < mHwModules.size(); i++)
2443    {
2444        if (strcmp(mHwModules[i]->mName, name) == 0) {
2445            return mHwModules[i];
2446        }
2447    }
2448    return module;
2449}
2450
2451audio_devices_t AudioPolicyManager::availablePrimaryOutputDevices()
2452{
2453    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(mPrimaryOutput);
2454    audio_devices_t devices = outputDesc->mProfile->mSupportedDevices.types();
2455    return devices & mAvailableOutputDevices.types();
2456}
2457
2458audio_devices_t AudioPolicyManager::availablePrimaryInputDevices()
2459{
2460    audio_module_handle_t primaryHandle =
2461                                mOutputs.valueFor(mPrimaryOutput)->mProfile->mModule->mHandle;
2462    audio_devices_t devices = AUDIO_DEVICE_NONE;
2463    for (size_t i = 0; i < mAvailableInputDevices.size(); i++) {
2464        if (mAvailableInputDevices[i]->mModule->mHandle == primaryHandle) {
2465            devices |= mAvailableInputDevices[i]->mDeviceType;
2466        }
2467    }
2468    return devices;
2469}
2470
2471status_t AudioPolicyManager::createAudioPatch(const struct audio_patch *patch,
2472                                               audio_patch_handle_t *handle,
2473                                               uid_t uid)
2474{
2475    ALOGV("createAudioPatch()");
2476
2477    if (handle == NULL || patch == NULL) {
2478        return BAD_VALUE;
2479    }
2480    ALOGV("createAudioPatch() num sources %d num sinks %d", patch->num_sources, patch->num_sinks);
2481
2482    if (patch->num_sources == 0 || patch->num_sources > AUDIO_PATCH_PORTS_MAX ||
2483            patch->num_sinks == 0 || patch->num_sinks > AUDIO_PATCH_PORTS_MAX) {
2484        return BAD_VALUE;
2485    }
2486    // only one source per audio patch supported for now
2487    if (patch->num_sources > 1) {
2488        return INVALID_OPERATION;
2489    }
2490
2491    if (patch->sources[0].role != AUDIO_PORT_ROLE_SOURCE) {
2492        return INVALID_OPERATION;
2493    }
2494    for (size_t i = 0; i < patch->num_sinks; i++) {
2495        if (patch->sinks[i].role != AUDIO_PORT_ROLE_SINK) {
2496            return INVALID_OPERATION;
2497        }
2498    }
2499
2500    sp<AudioPatch> patchDesc;
2501    ssize_t index = mAudioPatches.indexOfKey(*handle);
2502
2503    ALOGV("createAudioPatch source id %d role %d type %d", patch->sources[0].id,
2504                                                           patch->sources[0].role,
2505                                                           patch->sources[0].type);
2506#if LOG_NDEBUG == 0
2507    for (size_t i = 0; i < patch->num_sinks; i++) {
2508        ALOGV("createAudioPatch sink %d: id %d role %d type %d", i, patch->sinks[i].id,
2509                                                             patch->sinks[i].role,
2510                                                             patch->sinks[i].type);
2511    }
2512#endif
2513
2514    if (index >= 0) {
2515        patchDesc = mAudioPatches.valueAt(index);
2516        ALOGV("createAudioPatch() mUidCached %d patchDesc->mUid %d uid %d",
2517                                                                  mUidCached, patchDesc->mUid, uid);
2518        if (patchDesc->mUid != mUidCached && uid != patchDesc->mUid) {
2519            return INVALID_OPERATION;
2520        }
2521    } else {
2522        *handle = 0;
2523    }
2524
2525    if (patch->sources[0].type == AUDIO_PORT_TYPE_MIX) {
2526        sp<AudioOutputDescriptor> outputDesc = getOutputFromId(patch->sources[0].id);
2527        if (outputDesc == NULL) {
2528            ALOGV("createAudioPatch() output not found for id %d", patch->sources[0].id);
2529            return BAD_VALUE;
2530        }
2531        ALOG_ASSERT(!outputDesc->isDuplicated(),"duplicated output %d in source in ports",
2532                                                outputDesc->mIoHandle);
2533        if (patchDesc != 0) {
2534            if (patchDesc->mPatch.sources[0].id != patch->sources[0].id) {
2535                ALOGV("createAudioPatch() source id differs for patch current id %d new id %d",
2536                                          patchDesc->mPatch.sources[0].id, patch->sources[0].id);
2537                return BAD_VALUE;
2538            }
2539        }
2540        DeviceVector devices;
2541        for (size_t i = 0; i < patch->num_sinks; i++) {
2542            // Only support mix to devices connection
2543            // TODO add support for mix to mix connection
2544            if (patch->sinks[i].type != AUDIO_PORT_TYPE_DEVICE) {
2545                ALOGV("createAudioPatch() source mix but sink is not a device");
2546                return INVALID_OPERATION;
2547            }
2548            sp<DeviceDescriptor> devDesc =
2549                    mAvailableOutputDevices.getDeviceFromId(patch->sinks[i].id);
2550            if (devDesc == 0) {
2551                ALOGV("createAudioPatch() out device not found for id %d", patch->sinks[i].id);
2552                return BAD_VALUE;
2553            }
2554
2555            if (!outputDesc->mProfile->isCompatibleProfile(devDesc->mDeviceType,
2556                                                           devDesc->mAddress,
2557                                                           patch->sources[0].sample_rate,
2558                                                         NULL,  // updatedSamplingRate
2559                                                         patch->sources[0].format,
2560                                                         patch->sources[0].channel_mask,
2561                                                         AUDIO_OUTPUT_FLAG_NONE /*FIXME*/)) {
2562                ALOGV("createAudioPatch() profile not supported for device %08x",
2563                      devDesc->mDeviceType);
2564                return INVALID_OPERATION;
2565            }
2566            devices.add(devDesc);
2567        }
2568        if (devices.size() == 0) {
2569            return INVALID_OPERATION;
2570        }
2571
2572        // TODO: reconfigure output format and channels here
2573        ALOGV("createAudioPatch() setting device %08x on output %d",
2574              devices.types(), outputDesc->mIoHandle);
2575        setOutputDevice(outputDesc->mIoHandle, devices.types(), true, 0, handle);
2576        index = mAudioPatches.indexOfKey(*handle);
2577        if (index >= 0) {
2578            if (patchDesc != 0 && patchDesc != mAudioPatches.valueAt(index)) {
2579                ALOGW("createAudioPatch() setOutputDevice() did not reuse the patch provided");
2580            }
2581            patchDesc = mAudioPatches.valueAt(index);
2582            patchDesc->mUid = uid;
2583            ALOGV("createAudioPatch() success");
2584        } else {
2585            ALOGW("createAudioPatch() setOutputDevice() failed to create a patch");
2586            return INVALID_OPERATION;
2587        }
2588    } else if (patch->sources[0].type == AUDIO_PORT_TYPE_DEVICE) {
2589        if (patch->sinks[0].type == AUDIO_PORT_TYPE_MIX) {
2590            // input device to input mix connection
2591            // only one sink supported when connecting an input device to a mix
2592            if (patch->num_sinks > 1) {
2593                return INVALID_OPERATION;
2594            }
2595            sp<AudioInputDescriptor> inputDesc = getInputFromId(patch->sinks[0].id);
2596            if (inputDesc == NULL) {
2597                return BAD_VALUE;
2598            }
2599            if (patchDesc != 0) {
2600                if (patchDesc->mPatch.sinks[0].id != patch->sinks[0].id) {
2601                    return BAD_VALUE;
2602                }
2603            }
2604            sp<DeviceDescriptor> devDesc =
2605                    mAvailableInputDevices.getDeviceFromId(patch->sources[0].id);
2606            if (devDesc == 0) {
2607                return BAD_VALUE;
2608            }
2609
2610            if (!inputDesc->mProfile->isCompatibleProfile(devDesc->mDeviceType,
2611                                                          devDesc->mAddress,
2612                                                          patch->sinks[0].sample_rate,
2613                                                          NULL, /*updatedSampleRate*/
2614                                                          patch->sinks[0].format,
2615                                                          patch->sinks[0].channel_mask,
2616                                                          // FIXME for the parameter type,
2617                                                          // and the NONE
2618                                                          (audio_output_flags_t)
2619                                                            AUDIO_INPUT_FLAG_NONE)) {
2620                return INVALID_OPERATION;
2621            }
2622            // TODO: reconfigure output format and channels here
2623            ALOGV("createAudioPatch() setting device %08x on output %d",
2624                                                  devDesc->mDeviceType, inputDesc->mIoHandle);
2625            setInputDevice(inputDesc->mIoHandle, devDesc->mDeviceType, true, handle);
2626            index = mAudioPatches.indexOfKey(*handle);
2627            if (index >= 0) {
2628                if (patchDesc != 0 && patchDesc != mAudioPatches.valueAt(index)) {
2629                    ALOGW("createAudioPatch() setInputDevice() did not reuse the patch provided");
2630                }
2631                patchDesc = mAudioPatches.valueAt(index);
2632                patchDesc->mUid = uid;
2633                ALOGV("createAudioPatch() success");
2634            } else {
2635                ALOGW("createAudioPatch() setInputDevice() failed to create a patch");
2636                return INVALID_OPERATION;
2637            }
2638        } else if (patch->sinks[0].type == AUDIO_PORT_TYPE_DEVICE) {
2639            // device to device connection
2640            if (patchDesc != 0) {
2641                if (patchDesc->mPatch.sources[0].id != patch->sources[0].id) {
2642                    return BAD_VALUE;
2643                }
2644            }
2645            sp<DeviceDescriptor> srcDeviceDesc =
2646                    mAvailableInputDevices.getDeviceFromId(patch->sources[0].id);
2647            if (srcDeviceDesc == 0) {
2648                return BAD_VALUE;
2649            }
2650
2651            //update source and sink with our own data as the data passed in the patch may
2652            // be incomplete.
2653            struct audio_patch newPatch = *patch;
2654            srcDeviceDesc->toAudioPortConfig(&newPatch.sources[0], &patch->sources[0]);
2655
2656            for (size_t i = 0; i < patch->num_sinks; i++) {
2657                if (patch->sinks[i].type != AUDIO_PORT_TYPE_DEVICE) {
2658                    ALOGV("createAudioPatch() source device but one sink is not a device");
2659                    return INVALID_OPERATION;
2660                }
2661
2662                sp<DeviceDescriptor> sinkDeviceDesc =
2663                        mAvailableOutputDevices.getDeviceFromId(patch->sinks[i].id);
2664                if (sinkDeviceDesc == 0) {
2665                    return BAD_VALUE;
2666                }
2667                sinkDeviceDesc->toAudioPortConfig(&newPatch.sinks[i], &patch->sinks[i]);
2668
2669                if (srcDeviceDesc->mModule != sinkDeviceDesc->mModule) {
2670                    // only one sink supported when connected devices across HW modules
2671                    if (patch->num_sinks > 1) {
2672                        return INVALID_OPERATION;
2673                    }
2674                    SortedVector<audio_io_handle_t> outputs =
2675                                            getOutputsForDevice(sinkDeviceDesc->mDeviceType,
2676                                                                mOutputs);
2677                    // if the sink device is reachable via an opened output stream, request to go via
2678                    // this output stream by adding a second source to the patch description
2679                    audio_io_handle_t output = selectOutput(outputs,
2680                                                            AUDIO_OUTPUT_FLAG_NONE,
2681                                                            AUDIO_FORMAT_INVALID);
2682                    if (output != AUDIO_IO_HANDLE_NONE) {
2683                        sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
2684                        if (outputDesc->isDuplicated()) {
2685                            return INVALID_OPERATION;
2686                        }
2687                        outputDesc->toAudioPortConfig(&newPatch.sources[1], &patch->sources[0]);
2688                        newPatch.num_sources = 2;
2689                    }
2690                }
2691            }
2692            // TODO: check from routing capabilities in config file and other conflicting patches
2693
2694            audio_patch_handle_t afPatchHandle = AUDIO_PATCH_HANDLE_NONE;
2695            if (index >= 0) {
2696                afPatchHandle = patchDesc->mAfPatchHandle;
2697            }
2698
2699            status_t status = mpClientInterface->createAudioPatch(&newPatch,
2700                                                                  &afPatchHandle,
2701                                                                  0);
2702            ALOGV("createAudioPatch() patch panel returned %d patchHandle %d",
2703                                                                  status, afPatchHandle);
2704            if (status == NO_ERROR) {
2705                if (index < 0) {
2706                    patchDesc = new AudioPatch((audio_patch_handle_t)nextUniqueId(),
2707                                               &newPatch, uid);
2708                    addAudioPatch(patchDesc->mHandle, patchDesc);
2709                } else {
2710                    patchDesc->mPatch = newPatch;
2711                }
2712                patchDesc->mAfPatchHandle = afPatchHandle;
2713                *handle = patchDesc->mHandle;
2714                nextAudioPortGeneration();
2715                mpClientInterface->onAudioPatchListUpdate();
2716            } else {
2717                ALOGW("createAudioPatch() patch panel could not connect device patch, error %d",
2718                status);
2719                return INVALID_OPERATION;
2720            }
2721        } else {
2722            return BAD_VALUE;
2723        }
2724    } else {
2725        return BAD_VALUE;
2726    }
2727    return NO_ERROR;
2728}
2729
2730status_t AudioPolicyManager::releaseAudioPatch(audio_patch_handle_t handle,
2731                                                  uid_t uid)
2732{
2733    ALOGV("releaseAudioPatch() patch %d", handle);
2734
2735    ssize_t index = mAudioPatches.indexOfKey(handle);
2736
2737    if (index < 0) {
2738        return BAD_VALUE;
2739    }
2740    sp<AudioPatch> patchDesc = mAudioPatches.valueAt(index);
2741    ALOGV("releaseAudioPatch() mUidCached %d patchDesc->mUid %d uid %d",
2742          mUidCached, patchDesc->mUid, uid);
2743    if (patchDesc->mUid != mUidCached && uid != patchDesc->mUid) {
2744        return INVALID_OPERATION;
2745    }
2746
2747    struct audio_patch *patch = &patchDesc->mPatch;
2748    patchDesc->mUid = mUidCached;
2749    if (patch->sources[0].type == AUDIO_PORT_TYPE_MIX) {
2750        sp<AudioOutputDescriptor> outputDesc = getOutputFromId(patch->sources[0].id);
2751        if (outputDesc == NULL) {
2752            ALOGV("releaseAudioPatch() output not found for id %d", patch->sources[0].id);
2753            return BAD_VALUE;
2754        }
2755
2756        setOutputDevice(outputDesc->mIoHandle,
2757                        getNewOutputDevice(outputDesc->mIoHandle, true /*fromCache*/),
2758                       true,
2759                       0,
2760                       NULL);
2761    } else if (patch->sources[0].type == AUDIO_PORT_TYPE_DEVICE) {
2762        if (patch->sinks[0].type == AUDIO_PORT_TYPE_MIX) {
2763            sp<AudioInputDescriptor> inputDesc = getInputFromId(patch->sinks[0].id);
2764            if (inputDesc == NULL) {
2765                ALOGV("releaseAudioPatch() input not found for id %d", patch->sinks[0].id);
2766                return BAD_VALUE;
2767            }
2768            setInputDevice(inputDesc->mIoHandle,
2769                           getNewInputDevice(inputDesc->mIoHandle),
2770                           true,
2771                           NULL);
2772        } else if (patch->sinks[0].type == AUDIO_PORT_TYPE_DEVICE) {
2773            audio_patch_handle_t afPatchHandle = patchDesc->mAfPatchHandle;
2774            status_t status = mpClientInterface->releaseAudioPatch(patchDesc->mAfPatchHandle, 0);
2775            ALOGV("releaseAudioPatch() patch panel returned %d patchHandle %d",
2776                                                              status, patchDesc->mAfPatchHandle);
2777            removeAudioPatch(patchDesc->mHandle);
2778            nextAudioPortGeneration();
2779            mpClientInterface->onAudioPatchListUpdate();
2780        } else {
2781            return BAD_VALUE;
2782        }
2783    } else {
2784        return BAD_VALUE;
2785    }
2786    return NO_ERROR;
2787}
2788
2789status_t AudioPolicyManager::listAudioPatches(unsigned int *num_patches,
2790                                              struct audio_patch *patches,
2791                                              unsigned int *generation)
2792{
2793    if (num_patches == NULL || (*num_patches != 0 && patches == NULL) ||
2794            generation == NULL) {
2795        return BAD_VALUE;
2796    }
2797    ALOGV("listAudioPatches() num_patches %d patches %p available patches %zu",
2798          *num_patches, patches, mAudioPatches.size());
2799    if (patches == NULL) {
2800        *num_patches = 0;
2801    }
2802
2803    size_t patchesWritten = 0;
2804    size_t patchesMax = *num_patches;
2805    for (size_t i = 0;
2806            i  < mAudioPatches.size() && patchesWritten < patchesMax; i++) {
2807        patches[patchesWritten] = mAudioPatches[i]->mPatch;
2808        patches[patchesWritten++].id = mAudioPatches[i]->mHandle;
2809        ALOGV("listAudioPatches() patch %zu num_sources %d num_sinks %d",
2810              i, mAudioPatches[i]->mPatch.num_sources, mAudioPatches[i]->mPatch.num_sinks);
2811    }
2812    *num_patches = mAudioPatches.size();
2813
2814    *generation = curAudioPortGeneration();
2815    ALOGV("listAudioPatches() got %zu patches needed %d", patchesWritten, *num_patches);
2816    return NO_ERROR;
2817}
2818
2819status_t AudioPolicyManager::setAudioPortConfig(const struct audio_port_config *config)
2820{
2821    ALOGV("setAudioPortConfig()");
2822
2823    if (config == NULL) {
2824        return BAD_VALUE;
2825    }
2826    ALOGV("setAudioPortConfig() on port handle %d", config->id);
2827    // Only support gain configuration for now
2828    if (config->config_mask != AUDIO_PORT_CONFIG_GAIN) {
2829        return INVALID_OPERATION;
2830    }
2831
2832    sp<AudioPortConfig> audioPortConfig;
2833    if (config->type == AUDIO_PORT_TYPE_MIX) {
2834        if (config->role == AUDIO_PORT_ROLE_SOURCE) {
2835            sp<AudioOutputDescriptor> outputDesc = getOutputFromId(config->id);
2836            if (outputDesc == NULL) {
2837                return BAD_VALUE;
2838            }
2839            ALOG_ASSERT(!outputDesc->isDuplicated(),
2840                        "setAudioPortConfig() called on duplicated output %d",
2841                        outputDesc->mIoHandle);
2842            audioPortConfig = outputDesc;
2843        } else if (config->role == AUDIO_PORT_ROLE_SINK) {
2844            sp<AudioInputDescriptor> inputDesc = getInputFromId(config->id);
2845            if (inputDesc == NULL) {
2846                return BAD_VALUE;
2847            }
2848            audioPortConfig = inputDesc;
2849        } else {
2850            return BAD_VALUE;
2851        }
2852    } else if (config->type == AUDIO_PORT_TYPE_DEVICE) {
2853        sp<DeviceDescriptor> deviceDesc;
2854        if (config->role == AUDIO_PORT_ROLE_SOURCE) {
2855            deviceDesc = mAvailableInputDevices.getDeviceFromId(config->id);
2856        } else if (config->role == AUDIO_PORT_ROLE_SINK) {
2857            deviceDesc = mAvailableOutputDevices.getDeviceFromId(config->id);
2858        } else {
2859            return BAD_VALUE;
2860        }
2861        if (deviceDesc == NULL) {
2862            return BAD_VALUE;
2863        }
2864        audioPortConfig = deviceDesc;
2865    } else {
2866        return BAD_VALUE;
2867    }
2868
2869    struct audio_port_config backupConfig;
2870    status_t status = audioPortConfig->applyAudioPortConfig(config, &backupConfig);
2871    if (status == NO_ERROR) {
2872        struct audio_port_config newConfig;
2873        audioPortConfig->toAudioPortConfig(&newConfig, config);
2874        status = mpClientInterface->setAudioPortConfig(&newConfig, 0);
2875    }
2876    if (status != NO_ERROR) {
2877        audioPortConfig->applyAudioPortConfig(&backupConfig);
2878    }
2879
2880    return status;
2881}
2882
2883void AudioPolicyManager::clearAudioPatches(uid_t uid)
2884{
2885    for (ssize_t i = (ssize_t)mAudioPatches.size() - 1; i >= 0; i--)  {
2886        sp<AudioPatch> patchDesc = mAudioPatches.valueAt(i);
2887        if (patchDesc->mUid == uid) {
2888            releaseAudioPatch(mAudioPatches.keyAt(i), uid);
2889        }
2890    }
2891}
2892
2893status_t AudioPolicyManager::acquireSoundTriggerSession(audio_session_t *session,
2894                                       audio_io_handle_t *ioHandle,
2895                                       audio_devices_t *device)
2896{
2897    *session = (audio_session_t)mpClientInterface->newAudioUniqueId();
2898    *ioHandle = (audio_io_handle_t)mpClientInterface->newAudioUniqueId();
2899    *device = getDeviceForInputSource(AUDIO_SOURCE_HOTWORD);
2900
2901    mSoundTriggerSessions.add(*session, *ioHandle);
2902
2903    return NO_ERROR;
2904}
2905
2906status_t AudioPolicyManager::releaseSoundTriggerSession(audio_session_t session)
2907{
2908    ssize_t index = mSoundTriggerSessions.indexOfKey(session);
2909    if (index < 0) {
2910        ALOGW("acquireSoundTriggerSession() session %d not registered", session);
2911        return BAD_VALUE;
2912    }
2913
2914    mSoundTriggerSessions.removeItem(session);
2915    return NO_ERROR;
2916}
2917
2918status_t AudioPolicyManager::addAudioPatch(audio_patch_handle_t handle,
2919                                           const sp<AudioPatch>& patch)
2920{
2921    ssize_t index = mAudioPatches.indexOfKey(handle);
2922
2923    if (index >= 0) {
2924        ALOGW("addAudioPatch() patch %d already in", handle);
2925        return ALREADY_EXISTS;
2926    }
2927    mAudioPatches.add(handle, patch);
2928    ALOGV("addAudioPatch() handle %d af handle %d num_sources %d num_sinks %d source handle %d"
2929            "sink handle %d",
2930          handle, patch->mAfPatchHandle, patch->mPatch.num_sources, patch->mPatch.num_sinks,
2931          patch->mPatch.sources[0].id, patch->mPatch.sinks[0].id);
2932    return NO_ERROR;
2933}
2934
2935status_t AudioPolicyManager::removeAudioPatch(audio_patch_handle_t handle)
2936{
2937    ssize_t index = mAudioPatches.indexOfKey(handle);
2938
2939    if (index < 0) {
2940        ALOGW("removeAudioPatch() patch %d not in", handle);
2941        return ALREADY_EXISTS;
2942    }
2943    ALOGV("removeAudioPatch() handle %d af handle %d", handle,
2944                      mAudioPatches.valueAt(index)->mAfPatchHandle);
2945    mAudioPatches.removeItemsAt(index);
2946    return NO_ERROR;
2947}
2948
2949// ----------------------------------------------------------------------------
2950// AudioPolicyManager
2951// ----------------------------------------------------------------------------
2952
2953uint32_t AudioPolicyManager::nextUniqueId()
2954{
2955    return android_atomic_inc(&mNextUniqueId);
2956}
2957
2958uint32_t AudioPolicyManager::nextAudioPortGeneration()
2959{
2960    return android_atomic_inc(&mAudioPortGeneration);
2961}
2962
2963AudioPolicyManager::AudioPolicyManager(AudioPolicyClientInterface *clientInterface)
2964    :
2965#ifdef AUDIO_POLICY_TEST
2966    Thread(false),
2967#endif //AUDIO_POLICY_TEST
2968    mPrimaryOutput((audio_io_handle_t)0),
2969    mPhoneState(AUDIO_MODE_NORMAL),
2970    mLimitRingtoneVolume(false), mLastVoiceVolume(-1.0f),
2971    mTotalEffectsCpuLoad(0), mTotalEffectsMemory(0),
2972    mA2dpSuspended(false),
2973    mSpeakerDrcEnabled(false), mNextUniqueId(1),
2974    mAudioPortGeneration(1),
2975    mBeaconMuteRefCount(0),
2976    mBeaconPlayingRefCount(0),
2977    mBeaconMuted(false)
2978{
2979    mUidCached = getuid();
2980    mpClientInterface = clientInterface;
2981
2982    for (int i = 0; i < AUDIO_POLICY_FORCE_USE_CNT; i++) {
2983        mForceUse[i] = AUDIO_POLICY_FORCE_NONE;
2984    }
2985
2986    mDefaultOutputDevice = new DeviceDescriptor(String8(""), AUDIO_DEVICE_OUT_SPEAKER);
2987    if (loadAudioPolicyConfig(AUDIO_POLICY_VENDOR_CONFIG_FILE) != NO_ERROR) {
2988        if (loadAudioPolicyConfig(AUDIO_POLICY_CONFIG_FILE) != NO_ERROR) {
2989            ALOGE("could not load audio policy configuration file, setting defaults");
2990            defaultAudioPolicyConfig();
2991        }
2992    }
2993    // mAvailableOutputDevices and mAvailableInputDevices now contain all attached devices
2994
2995    // must be done after reading the policy
2996    initializeVolumeCurves();
2997
2998    // open all output streams needed to access attached devices
2999    audio_devices_t outputDeviceTypes = mAvailableOutputDevices.types();
3000    audio_devices_t inputDeviceTypes = mAvailableInputDevices.types() & ~AUDIO_DEVICE_BIT_IN;
3001    for (size_t i = 0; i < mHwModules.size(); i++) {
3002        mHwModules[i]->mHandle = mpClientInterface->loadHwModule(mHwModules[i]->mName);
3003        if (mHwModules[i]->mHandle == 0) {
3004            ALOGW("could not open HW module %s", mHwModules[i]->mName);
3005            continue;
3006        }
3007        // open all output streams needed to access attached devices
3008        // except for direct output streams that are only opened when they are actually
3009        // required by an app.
3010        // This also validates mAvailableOutputDevices list
3011        for (size_t j = 0; j < mHwModules[i]->mOutputProfiles.size(); j++)
3012        {
3013            const sp<IOProfile> outProfile = mHwModules[i]->mOutputProfiles[j];
3014
3015            if (outProfile->mSupportedDevices.isEmpty()) {
3016                ALOGW("Output profile contains no device on module %s", mHwModules[i]->mName);
3017                continue;
3018            }
3019
3020            if ((outProfile->mFlags & AUDIO_OUTPUT_FLAG_DIRECT) != 0) {
3021                continue;
3022            }
3023            audio_devices_t profileType = outProfile->mSupportedDevices.types();
3024            if ((profileType & mDefaultOutputDevice->mDeviceType) != AUDIO_DEVICE_NONE) {
3025                profileType = mDefaultOutputDevice->mDeviceType;
3026            } else {
3027                // chose first device present in mSupportedDevices also part of
3028                // outputDeviceTypes
3029                for (size_t k = 0; k  < outProfile->mSupportedDevices.size(); k++) {
3030                    profileType = outProfile->mSupportedDevices[k]->mDeviceType;
3031                    if ((profileType & outputDeviceTypes) != 0) {
3032                        break;
3033                    }
3034                }
3035            }
3036            if ((profileType & outputDeviceTypes) == 0) {
3037                continue;
3038            }
3039            sp<AudioOutputDescriptor> outputDesc = new AudioOutputDescriptor(outProfile);
3040
3041            outputDesc->mDevice = profileType;
3042            audio_config_t config = AUDIO_CONFIG_INITIALIZER;
3043            config.sample_rate = outputDesc->mSamplingRate;
3044            config.channel_mask = outputDesc->mChannelMask;
3045            config.format = outputDesc->mFormat;
3046            audio_io_handle_t output = AUDIO_IO_HANDLE_NONE;
3047            status_t status = mpClientInterface->openOutput(outProfile->mModule->mHandle,
3048                                                            &output,
3049                                                            &config,
3050                                                            &outputDesc->mDevice,
3051                                                            String8(""),
3052                                                            &outputDesc->mLatency,
3053                                                            outputDesc->mFlags);
3054
3055            if (status != NO_ERROR) {
3056                ALOGW("Cannot open output stream for device %08x on hw module %s",
3057                      outputDesc->mDevice,
3058                      mHwModules[i]->mName);
3059            } else {
3060                outputDesc->mSamplingRate = config.sample_rate;
3061                outputDesc->mChannelMask = config.channel_mask;
3062                outputDesc->mFormat = config.format;
3063
3064                for (size_t k = 0; k  < outProfile->mSupportedDevices.size(); k++) {
3065                    audio_devices_t type = outProfile->mSupportedDevices[k]->mDeviceType;
3066                    ssize_t index =
3067                            mAvailableOutputDevices.indexOf(outProfile->mSupportedDevices[k]);
3068                    // give a valid ID to an attached device once confirmed it is reachable
3069                    if ((index >= 0) && (mAvailableOutputDevices[index]->mId == 0)) {
3070                        mAvailableOutputDevices[index]->mId = nextUniqueId();
3071                        mAvailableOutputDevices[index]->mModule = mHwModules[i];
3072                    }
3073                }
3074                if (mPrimaryOutput == 0 &&
3075                        outProfile->mFlags & AUDIO_OUTPUT_FLAG_PRIMARY) {
3076                    mPrimaryOutput = output;
3077                }
3078                addOutput(output, outputDesc);
3079                setOutputDevice(output,
3080                                outputDesc->mDevice,
3081                                true);
3082            }
3083        }
3084        // open input streams needed to access attached devices to validate
3085        // mAvailableInputDevices list
3086        for (size_t j = 0; j < mHwModules[i]->mInputProfiles.size(); j++)
3087        {
3088            const sp<IOProfile> inProfile = mHwModules[i]->mInputProfiles[j];
3089
3090            if (inProfile->mSupportedDevices.isEmpty()) {
3091                ALOGW("Input profile contains no device on module %s", mHwModules[i]->mName);
3092                continue;
3093            }
3094            // chose first device present in mSupportedDevices also part of
3095            // inputDeviceTypes
3096            audio_devices_t profileType = AUDIO_DEVICE_NONE;
3097            for (size_t k = 0; k  < inProfile->mSupportedDevices.size(); k++) {
3098                profileType = inProfile->mSupportedDevices[k]->mDeviceType;
3099                if (profileType & inputDeviceTypes) {
3100                    break;
3101                }
3102            }
3103            if ((profileType & inputDeviceTypes) == 0) {
3104                continue;
3105            }
3106            sp<AudioInputDescriptor> inputDesc = new AudioInputDescriptor(inProfile);
3107
3108            inputDesc->mInputSource = AUDIO_SOURCE_MIC;
3109            inputDesc->mDevice = profileType;
3110
3111            // find the address
3112            DeviceVector inputDevices = mAvailableInputDevices.getDevicesFromType(profileType);
3113            //   the inputs vector must be of size 1, but we don't want to crash here
3114            String8 address = inputDevices.size() > 0 ? inputDevices.itemAt(0)->mAddress
3115                    : String8("");
3116            ALOGV("  for input device 0x%x using address %s", profileType, address.string());
3117            ALOGE_IF(inputDevices.size() == 0, "Input device list is empty!");
3118
3119            audio_config_t config = AUDIO_CONFIG_INITIALIZER;
3120            config.sample_rate = inputDesc->mSamplingRate;
3121            config.channel_mask = inputDesc->mChannelMask;
3122            config.format = inputDesc->mFormat;
3123            audio_io_handle_t input = AUDIO_IO_HANDLE_NONE;
3124            status_t status = mpClientInterface->openInput(inProfile->mModule->mHandle,
3125                                                           &input,
3126                                                           &config,
3127                                                           &inputDesc->mDevice,
3128                                                           address,
3129                                                           AUDIO_SOURCE_MIC,
3130                                                           AUDIO_INPUT_FLAG_NONE);
3131
3132            if (status == NO_ERROR) {
3133                for (size_t k = 0; k  < inProfile->mSupportedDevices.size(); k++) {
3134                    audio_devices_t type = inProfile->mSupportedDevices[k]->mDeviceType;
3135                    ssize_t index =
3136                            mAvailableInputDevices.indexOf(inProfile->mSupportedDevices[k]);
3137                    // give a valid ID to an attached device once confirmed it is reachable
3138                    if ((index >= 0) && (mAvailableInputDevices[index]->mId == 0)) {
3139                        mAvailableInputDevices[index]->mId = nextUniqueId();
3140                        mAvailableInputDevices[index]->mModule = mHwModules[i];
3141                    }
3142                }
3143                mpClientInterface->closeInput(input);
3144            } else {
3145                ALOGW("Cannot open input stream for device %08x on hw module %s",
3146                      inputDesc->mDevice,
3147                      mHwModules[i]->mName);
3148            }
3149        }
3150    }
3151    // make sure all attached devices have been allocated a unique ID
3152    for (size_t i = 0; i  < mAvailableOutputDevices.size();) {
3153        if (mAvailableOutputDevices[i]->mId == 0) {
3154            ALOGW("Input device %08x unreachable", mAvailableOutputDevices[i]->mDeviceType);
3155            mAvailableOutputDevices.remove(mAvailableOutputDevices[i]);
3156            continue;
3157        }
3158        i++;
3159    }
3160    for (size_t i = 0; i  < mAvailableInputDevices.size();) {
3161        if (mAvailableInputDevices[i]->mId == 0) {
3162            ALOGW("Input device %08x unreachable", mAvailableInputDevices[i]->mDeviceType);
3163            mAvailableInputDevices.remove(mAvailableInputDevices[i]);
3164            continue;
3165        }
3166        i++;
3167    }
3168    // make sure default device is reachable
3169    if (mAvailableOutputDevices.indexOf(mDefaultOutputDevice) < 0) {
3170        ALOGE("Default device %08x is unreachable", mDefaultOutputDevice->mDeviceType);
3171    }
3172
3173    ALOGE_IF((mPrimaryOutput == 0), "Failed to open primary output");
3174
3175    updateDevicesAndOutputs();
3176
3177#ifdef AUDIO_POLICY_TEST
3178    if (mPrimaryOutput != 0) {
3179        AudioParameter outputCmd = AudioParameter();
3180        outputCmd.addInt(String8("set_id"), 0);
3181        mpClientInterface->setParameters(mPrimaryOutput, outputCmd.toString());
3182
3183        mTestDevice = AUDIO_DEVICE_OUT_SPEAKER;
3184        mTestSamplingRate = 44100;
3185        mTestFormat = AUDIO_FORMAT_PCM_16_BIT;
3186        mTestChannels =  AUDIO_CHANNEL_OUT_STEREO;
3187        mTestLatencyMs = 0;
3188        mCurOutput = 0;
3189        mDirectOutput = false;
3190        for (int i = 0; i < NUM_TEST_OUTPUTS; i++) {
3191            mTestOutputs[i] = 0;
3192        }
3193
3194        const size_t SIZE = 256;
3195        char buffer[SIZE];
3196        snprintf(buffer, SIZE, "AudioPolicyManagerTest");
3197        run(buffer, ANDROID_PRIORITY_AUDIO);
3198    }
3199#endif //AUDIO_POLICY_TEST
3200}
3201
3202AudioPolicyManager::~AudioPolicyManager()
3203{
3204#ifdef AUDIO_POLICY_TEST
3205    exit();
3206#endif //AUDIO_POLICY_TEST
3207   for (size_t i = 0; i < mOutputs.size(); i++) {
3208        mpClientInterface->closeOutput(mOutputs.keyAt(i));
3209   }
3210   for (size_t i = 0; i < mInputs.size(); i++) {
3211        mpClientInterface->closeInput(mInputs.keyAt(i));
3212   }
3213   mAvailableOutputDevices.clear();
3214   mAvailableInputDevices.clear();
3215   mOutputs.clear();
3216   mInputs.clear();
3217   mHwModules.clear();
3218}
3219
3220status_t AudioPolicyManager::initCheck()
3221{
3222    return (mPrimaryOutput == 0) ? NO_INIT : NO_ERROR;
3223}
3224
3225#ifdef AUDIO_POLICY_TEST
3226bool AudioPolicyManager::threadLoop()
3227{
3228    ALOGV("entering threadLoop()");
3229    while (!exitPending())
3230    {
3231        String8 command;
3232        int valueInt;
3233        String8 value;
3234
3235        Mutex::Autolock _l(mLock);
3236        mWaitWorkCV.waitRelative(mLock, milliseconds(50));
3237
3238        command = mpClientInterface->getParameters(0, String8("test_cmd_policy"));
3239        AudioParameter param = AudioParameter(command);
3240
3241        if (param.getInt(String8("test_cmd_policy"), valueInt) == NO_ERROR &&
3242            valueInt != 0) {
3243            ALOGV("Test command %s received", command.string());
3244            String8 target;
3245            if (param.get(String8("target"), target) != NO_ERROR) {
3246                target = "Manager";
3247            }
3248            if (param.getInt(String8("test_cmd_policy_output"), valueInt) == NO_ERROR) {
3249                param.remove(String8("test_cmd_policy_output"));
3250                mCurOutput = valueInt;
3251            }
3252            if (param.get(String8("test_cmd_policy_direct"), value) == NO_ERROR) {
3253                param.remove(String8("test_cmd_policy_direct"));
3254                if (value == "false") {
3255                    mDirectOutput = false;
3256                } else if (value == "true") {
3257                    mDirectOutput = true;
3258                }
3259            }
3260            if (param.getInt(String8("test_cmd_policy_input"), valueInt) == NO_ERROR) {
3261                param.remove(String8("test_cmd_policy_input"));
3262                mTestInput = valueInt;
3263            }
3264
3265            if (param.get(String8("test_cmd_policy_format"), value) == NO_ERROR) {
3266                param.remove(String8("test_cmd_policy_format"));
3267                int format = AUDIO_FORMAT_INVALID;
3268                if (value == "PCM 16 bits") {
3269                    format = AUDIO_FORMAT_PCM_16_BIT;
3270                } else if (value == "PCM 8 bits") {
3271                    format = AUDIO_FORMAT_PCM_8_BIT;
3272                } else if (value == "Compressed MP3") {
3273                    format = AUDIO_FORMAT_MP3;
3274                }
3275                if (format != AUDIO_FORMAT_INVALID) {
3276                    if (target == "Manager") {
3277                        mTestFormat = format;
3278                    } else if (mTestOutputs[mCurOutput] != 0) {
3279                        AudioParameter outputParam = AudioParameter();
3280                        outputParam.addInt(String8("format"), format);
3281                        mpClientInterface->setParameters(mTestOutputs[mCurOutput], outputParam.toString());
3282                    }
3283                }
3284            }
3285            if (param.get(String8("test_cmd_policy_channels"), value) == NO_ERROR) {
3286                param.remove(String8("test_cmd_policy_channels"));
3287                int channels = 0;
3288
3289                if (value == "Channels Stereo") {
3290                    channels =  AUDIO_CHANNEL_OUT_STEREO;
3291                } else if (value == "Channels Mono") {
3292                    channels =  AUDIO_CHANNEL_OUT_MONO;
3293                }
3294                if (channels != 0) {
3295                    if (target == "Manager") {
3296                        mTestChannels = channels;
3297                    } else if (mTestOutputs[mCurOutput] != 0) {
3298                        AudioParameter outputParam = AudioParameter();
3299                        outputParam.addInt(String8("channels"), channels);
3300                        mpClientInterface->setParameters(mTestOutputs[mCurOutput], outputParam.toString());
3301                    }
3302                }
3303            }
3304            if (param.getInt(String8("test_cmd_policy_sampleRate"), valueInt) == NO_ERROR) {
3305                param.remove(String8("test_cmd_policy_sampleRate"));
3306                if (valueInt >= 0 && valueInt <= 96000) {
3307                    int samplingRate = valueInt;
3308                    if (target == "Manager") {
3309                        mTestSamplingRate = samplingRate;
3310                    } else if (mTestOutputs[mCurOutput] != 0) {
3311                        AudioParameter outputParam = AudioParameter();
3312                        outputParam.addInt(String8("sampling_rate"), samplingRate);
3313                        mpClientInterface->setParameters(mTestOutputs[mCurOutput], outputParam.toString());
3314                    }
3315                }
3316            }
3317
3318            if (param.get(String8("test_cmd_policy_reopen"), value) == NO_ERROR) {
3319                param.remove(String8("test_cmd_policy_reopen"));
3320
3321                sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(mPrimaryOutput);
3322                mpClientInterface->closeOutput(mPrimaryOutput);
3323
3324                audio_module_handle_t moduleHandle = outputDesc->mModule->mHandle;
3325
3326                mOutputs.removeItem(mPrimaryOutput);
3327
3328                sp<AudioOutputDescriptor> outputDesc = new AudioOutputDescriptor(NULL);
3329                outputDesc->mDevice = AUDIO_DEVICE_OUT_SPEAKER;
3330                audio_config_t config = AUDIO_CONFIG_INITIALIZER;
3331                config.sample_rate = outputDesc->mSamplingRate;
3332                config.channel_mask = outputDesc->mChannelMask;
3333                config.format = outputDesc->mFormat;
3334                status_t status = mpClientInterface->openOutput(moduleHandle,
3335                                                                &mPrimaryOutput,
3336                                                                &config,
3337                                                                &outputDesc->mDevice,
3338                                                                String8(""),
3339                                                                &outputDesc->mLatency,
3340                                                                outputDesc->mFlags);
3341                if (status != NO_ERROR) {
3342                    ALOGE("Failed to reopen hardware output stream, "
3343                        "samplingRate: %d, format %d, channels %d",
3344                        outputDesc->mSamplingRate, outputDesc->mFormat, outputDesc->mChannelMask);
3345                } else {
3346                    outputDesc->mSamplingRate = config.sample_rate;
3347                    outputDesc->mChannelMask = config.channel_mask;
3348                    outputDesc->mFormat = config.format;
3349                    AudioParameter outputCmd = AudioParameter();
3350                    outputCmd.addInt(String8("set_id"), 0);
3351                    mpClientInterface->setParameters(mPrimaryOutput, outputCmd.toString());
3352                    addOutput(mPrimaryOutput, outputDesc);
3353                }
3354            }
3355
3356
3357            mpClientInterface->setParameters(0, String8("test_cmd_policy="));
3358        }
3359    }
3360    return false;
3361}
3362
3363void AudioPolicyManager::exit()
3364{
3365    {
3366        AutoMutex _l(mLock);
3367        requestExit();
3368        mWaitWorkCV.signal();
3369    }
3370    requestExitAndWait();
3371}
3372
3373int AudioPolicyManager::testOutputIndex(audio_io_handle_t output)
3374{
3375    for (int i = 0; i < NUM_TEST_OUTPUTS; i++) {
3376        if (output == mTestOutputs[i]) return i;
3377    }
3378    return 0;
3379}
3380#endif //AUDIO_POLICY_TEST
3381
3382// ---
3383
3384void AudioPolicyManager::addOutput(audio_io_handle_t output, sp<AudioOutputDescriptor> outputDesc)
3385{
3386    outputDesc->mIoHandle = output;
3387    outputDesc->mId = nextUniqueId();
3388    mOutputs.add(output, outputDesc);
3389    nextAudioPortGeneration();
3390}
3391
3392void AudioPolicyManager::addInput(audio_io_handle_t input, sp<AudioInputDescriptor> inputDesc)
3393{
3394    inputDesc->mIoHandle = input;
3395    inputDesc->mId = nextUniqueId();
3396    mInputs.add(input, inputDesc);
3397    nextAudioPortGeneration();
3398}
3399
3400void AudioPolicyManager::findIoHandlesByAddress(sp<AudioOutputDescriptor> desc /*in*/,
3401        const String8 address /*in*/,
3402        SortedVector<audio_io_handle_t>& outputs /*out*/) {
3403    // look for a match on the given address on the addresses of the outputs:
3404    // find the address by finding the patch that maps to this output
3405    ssize_t patchIdx = mAudioPatches.indexOfKey(desc->mPatchHandle);
3406    //ALOGV("    inspecting output %d (patch %d) for supported device=0x%x",
3407    //        outputIdx, patchIdx,  desc->mProfile->mSupportedDevices.types());
3408    if (patchIdx >= 0) {
3409        const sp<AudioPatch> patchDesc = mAudioPatches.valueAt(patchIdx);
3410        const int numSinks = patchDesc->mPatch.num_sinks;
3411        for (ssize_t j=0; j < numSinks; j++) {
3412            if (patchDesc->mPatch.sinks[j].type == AUDIO_PORT_TYPE_DEVICE) {
3413                const char* patchAddr =
3414                        patchDesc->mPatch.sinks[j].ext.device.address;
3415                if (strncmp(patchAddr,
3416                        address.string(), AUDIO_DEVICE_MAX_ADDRESS_LEN) == 0) {
3417                    ALOGV("findIoHandlesByAddress(): adding opened output %d on same address %s",
3418                            desc->mIoHandle,  patchDesc->mPatch.sinks[j].ext.device.address);
3419                    outputs.add(desc->mIoHandle);
3420                    break;
3421                }
3422            }
3423        }
3424    }
3425}
3426
3427status_t AudioPolicyManager::checkOutputsForDevice(const sp<DeviceDescriptor> devDesc,
3428                                                       audio_policy_dev_state_t state,
3429                                                       SortedVector<audio_io_handle_t>& outputs,
3430                                                       const String8 address)
3431{
3432    audio_devices_t device = devDesc->mDeviceType;
3433    sp<AudioOutputDescriptor> desc;
3434    // erase all current sample rates, formats and channel masks
3435    devDesc->clearCapabilities();
3436
3437    if (state == AUDIO_POLICY_DEVICE_STATE_AVAILABLE) {
3438        // first list already open outputs that can be routed to this device
3439        for (size_t i = 0; i < mOutputs.size(); i++) {
3440            desc = mOutputs.valueAt(i);
3441            if (!desc->isDuplicated() && (desc->mProfile->mSupportedDevices.types() & device)) {
3442                if (!deviceDistinguishesOnAddress(device)) {
3443                    ALOGV("checkOutputsForDevice(): adding opened output %d", mOutputs.keyAt(i));
3444                    outputs.add(mOutputs.keyAt(i));
3445                } else {
3446                    ALOGV("  checking address match due to device 0x%x", device);
3447                    findIoHandlesByAddress(desc, address, outputs);
3448                }
3449            }
3450        }
3451        // then look for output profiles that can be routed to this device
3452        SortedVector< sp<IOProfile> > profiles;
3453        for (size_t i = 0; i < mHwModules.size(); i++)
3454        {
3455            if (mHwModules[i]->mHandle == 0) {
3456                continue;
3457            }
3458            for (size_t j = 0; j < mHwModules[i]->mOutputProfiles.size(); j++)
3459            {
3460                sp<IOProfile> profile = mHwModules[i]->mOutputProfiles[j];
3461                if (profile->mSupportedDevices.types() & device) {
3462                    if (!deviceDistinguishesOnAddress(device) ||
3463                            address == profile->mSupportedDevices[0]->mAddress) {
3464                        profiles.add(profile);
3465                        ALOGV("checkOutputsForDevice(): adding profile %zu from module %zu", j, i);
3466                    }
3467                }
3468            }
3469        }
3470
3471        ALOGV("  found %d profiles, %d outputs", profiles.size(), outputs.size());
3472
3473        if (profiles.isEmpty() && outputs.isEmpty()) {
3474            ALOGW("checkOutputsForDevice(): No output available for device %04x", device);
3475            return BAD_VALUE;
3476        }
3477
3478        // open outputs for matching profiles if needed. Direct outputs are also opened to
3479        // query for dynamic parameters and will be closed later by setDeviceConnectionState()
3480        for (ssize_t profile_index = 0; profile_index < (ssize_t)profiles.size(); profile_index++) {
3481            sp<IOProfile> profile = profiles[profile_index];
3482
3483            // nothing to do if one output is already opened for this profile
3484            size_t j;
3485            for (j = 0; j < outputs.size(); j++) {
3486                desc = mOutputs.valueFor(outputs.itemAt(j));
3487                if (!desc->isDuplicated() && desc->mProfile == profile) {
3488                    // matching profile: save the sample rates, format and channel masks supported
3489                    // by the profile in our device descriptor
3490                    devDesc->importAudioPort(profile);
3491                    break;
3492                }
3493            }
3494            if (j != outputs.size()) {
3495                continue;
3496            }
3497
3498            ALOGV("opening output for device %08x with params %s profile %p",
3499                                                      device, address.string(), profile.get());
3500            desc = new AudioOutputDescriptor(profile);
3501            desc->mDevice = device;
3502            audio_config_t config = AUDIO_CONFIG_INITIALIZER;
3503            config.sample_rate = desc->mSamplingRate;
3504            config.channel_mask = desc->mChannelMask;
3505            config.format = desc->mFormat;
3506            config.offload_info.sample_rate = desc->mSamplingRate;
3507            config.offload_info.channel_mask = desc->mChannelMask;
3508            config.offload_info.format = desc->mFormat;
3509            audio_io_handle_t output = AUDIO_IO_HANDLE_NONE;
3510            status_t status = mpClientInterface->openOutput(profile->mModule->mHandle,
3511                                                            &output,
3512                                                            &config,
3513                                                            &desc->mDevice,
3514                                                            address,
3515                                                            &desc->mLatency,
3516                                                            desc->mFlags);
3517            if (status == NO_ERROR) {
3518                desc->mSamplingRate = config.sample_rate;
3519                desc->mChannelMask = config.channel_mask;
3520                desc->mFormat = config.format;
3521
3522                // Here is where the out_set_parameters() for card & device gets called
3523                if (!address.isEmpty()) {
3524                    char *param = audio_device_address_to_parameter(device, address);
3525                    mpClientInterface->setParameters(output, String8(param));
3526                    free(param);
3527                }
3528
3529                // Here is where we step through and resolve any "dynamic" fields
3530                String8 reply;
3531                char *value;
3532                if (profile->mSamplingRates[0] == 0) {
3533                    reply = mpClientInterface->getParameters(output,
3534                                            String8(AUDIO_PARAMETER_STREAM_SUP_SAMPLING_RATES));
3535                    ALOGV("checkOutputsForDevice() supported sampling rates %s",
3536                              reply.string());
3537                    value = strpbrk((char *)reply.string(), "=");
3538                    if (value != NULL) {
3539                        profile->loadSamplingRates(value + 1);
3540                    }
3541                }
3542                if (profile->mFormats[0] == AUDIO_FORMAT_DEFAULT) {
3543                    reply = mpClientInterface->getParameters(output,
3544                                                   String8(AUDIO_PARAMETER_STREAM_SUP_FORMATS));
3545                    ALOGV("checkOutputsForDevice() supported formats %s",
3546                              reply.string());
3547                    value = strpbrk((char *)reply.string(), "=");
3548                    if (value != NULL) {
3549                        profile->loadFormats(value + 1);
3550                    }
3551                }
3552                if (profile->mChannelMasks[0] == 0) {
3553                    reply = mpClientInterface->getParameters(output,
3554                                                  String8(AUDIO_PARAMETER_STREAM_SUP_CHANNELS));
3555                    ALOGV("checkOutputsForDevice() supported channel masks %s",
3556                              reply.string());
3557                    value = strpbrk((char *)reply.string(), "=");
3558                    if (value != NULL) {
3559                        profile->loadOutChannels(value + 1);
3560                    }
3561                }
3562                if (((profile->mSamplingRates[0] == 0) &&
3563                         (profile->mSamplingRates.size() < 2)) ||
3564                     ((profile->mFormats[0] == AUDIO_FORMAT_DEFAULT) &&
3565                         (profile->mFormats.size() < 2)) ||
3566                     ((profile->mChannelMasks[0] == 0) &&
3567                         (profile->mChannelMasks.size() < 2))) {
3568                    ALOGW("checkOutputsForDevice() missing param");
3569                    mpClientInterface->closeOutput(output);
3570                    output = AUDIO_IO_HANDLE_NONE;
3571                } else if (profile->mSamplingRates[0] == 0 || profile->mFormats[0] == 0 ||
3572                            profile->mChannelMasks[0] == 0) {
3573                    mpClientInterface->closeOutput(output);
3574                    config.sample_rate = profile->pickSamplingRate();
3575                    config.channel_mask = profile->pickChannelMask();
3576                    config.format = profile->pickFormat();
3577                    config.offload_info.sample_rate = config.sample_rate;
3578                    config.offload_info.channel_mask = config.channel_mask;
3579                    config.offload_info.format = config.format;
3580                    status = mpClientInterface->openOutput(profile->mModule->mHandle,
3581                                                           &output,
3582                                                           &config,
3583                                                           &desc->mDevice,
3584                                                           address,
3585                                                           &desc->mLatency,
3586                                                           desc->mFlags);
3587                    if (status == NO_ERROR) {
3588                        desc->mSamplingRate = config.sample_rate;
3589                        desc->mChannelMask = config.channel_mask;
3590                        desc->mFormat = config.format;
3591                    } else {
3592                        output = AUDIO_IO_HANDLE_NONE;
3593                    }
3594                }
3595
3596                if (output != AUDIO_IO_HANDLE_NONE) {
3597                    addOutput(output, desc);
3598                    if (deviceDistinguishesOnAddress(device) && address != "0") {
3599                        ssize_t index = mPolicyMixes.indexOfKey(address);
3600                        if (index >= 0) {
3601                            mPolicyMixes[index]->mOutput = desc;
3602                            desc->mPolicyMix = &mPolicyMixes[index]->mMix;
3603                        } else {
3604                            ALOGE("checkOutputsForDevice() cannot find policy for address %s",
3605                                  address.string());
3606                        }
3607                    } else if ((desc->mFlags & AUDIO_OUTPUT_FLAG_DIRECT) == 0) {
3608                        // no duplicated output for direct outputs and
3609                        // outputs used by dynamic policy mixes
3610                        audio_io_handle_t duplicatedOutput = AUDIO_IO_HANDLE_NONE;
3611
3612                        // set initial stream volume for device
3613                        applyStreamVolumes(output, device, 0, true);
3614
3615                        //TODO: configure audio effect output stage here
3616
3617                        // open a duplicating output thread for the new output and the primary output
3618                        duplicatedOutput = mpClientInterface->openDuplicateOutput(output,
3619                                                                                  mPrimaryOutput);
3620                        if (duplicatedOutput != AUDIO_IO_HANDLE_NONE) {
3621                            // add duplicated output descriptor
3622                            sp<AudioOutputDescriptor> dupOutputDesc =
3623                                    new AudioOutputDescriptor(NULL);
3624                            dupOutputDesc->mOutput1 = mOutputs.valueFor(mPrimaryOutput);
3625                            dupOutputDesc->mOutput2 = mOutputs.valueFor(output);
3626                            dupOutputDesc->mSamplingRate = desc->mSamplingRate;
3627                            dupOutputDesc->mFormat = desc->mFormat;
3628                            dupOutputDesc->mChannelMask = desc->mChannelMask;
3629                            dupOutputDesc->mLatency = desc->mLatency;
3630                            addOutput(duplicatedOutput, dupOutputDesc);
3631                            applyStreamVolumes(duplicatedOutput, device, 0, true);
3632                        } else {
3633                            ALOGW("checkOutputsForDevice() could not open dup output for %d and %d",
3634                                    mPrimaryOutput, output);
3635                            mpClientInterface->closeOutput(output);
3636                            mOutputs.removeItem(output);
3637                            nextAudioPortGeneration();
3638                            output = AUDIO_IO_HANDLE_NONE;
3639                        }
3640                    }
3641                }
3642            } else {
3643                output = AUDIO_IO_HANDLE_NONE;
3644            }
3645            if (output == AUDIO_IO_HANDLE_NONE) {
3646                ALOGW("checkOutputsForDevice() could not open output for device %x", device);
3647                profiles.removeAt(profile_index);
3648                profile_index--;
3649            } else {
3650                outputs.add(output);
3651                devDesc->importAudioPort(profile);
3652
3653                if (deviceDistinguishesOnAddress(device)) {
3654                    ALOGV("checkOutputsForDevice(): setOutputDevice(dev=0x%x, addr=%s)",
3655                            device, address.string());
3656                    setOutputDevice(output, device, true/*force*/, 0/*delay*/,
3657                            NULL/*patch handle*/, address.string());
3658                }
3659                ALOGV("checkOutputsForDevice(): adding output %d", output);
3660            }
3661        }
3662
3663        if (profiles.isEmpty()) {
3664            ALOGW("checkOutputsForDevice(): No output available for device %04x", device);
3665            return BAD_VALUE;
3666        }
3667    } else { // Disconnect
3668        // check if one opened output is not needed any more after disconnecting one device
3669        for (size_t i = 0; i < mOutputs.size(); i++) {
3670            desc = mOutputs.valueAt(i);
3671            if (!desc->isDuplicated()) {
3672                // exact match on device
3673                if (deviceDistinguishesOnAddress(device) &&
3674                        (desc->mProfile->mSupportedDevices.types() == device)) {
3675                    findIoHandlesByAddress(desc, address, outputs);
3676                } else if (!(desc->mProfile->mSupportedDevices.types()
3677                        & mAvailableOutputDevices.types())) {
3678                    ALOGV("checkOutputsForDevice(): disconnecting adding output %d",
3679                            mOutputs.keyAt(i));
3680                    outputs.add(mOutputs.keyAt(i));
3681                }
3682            }
3683        }
3684        // Clear any profiles associated with the disconnected device.
3685        for (size_t i = 0; i < mHwModules.size(); i++)
3686        {
3687            if (mHwModules[i]->mHandle == 0) {
3688                continue;
3689            }
3690            for (size_t j = 0; j < mHwModules[i]->mOutputProfiles.size(); j++)
3691            {
3692                sp<IOProfile> profile = mHwModules[i]->mOutputProfiles[j];
3693                if (profile->mSupportedDevices.types() & device) {
3694                    ALOGV("checkOutputsForDevice(): "
3695                            "clearing direct output profile %zu on module %zu", j, i);
3696                    if (profile->mSamplingRates[0] == 0) {
3697                        profile->mSamplingRates.clear();
3698                        profile->mSamplingRates.add(0);
3699                    }
3700                    if (profile->mFormats[0] == AUDIO_FORMAT_DEFAULT) {
3701                        profile->mFormats.clear();
3702                        profile->mFormats.add(AUDIO_FORMAT_DEFAULT);
3703                    }
3704                    if (profile->mChannelMasks[0] == 0) {
3705                        profile->mChannelMasks.clear();
3706                        profile->mChannelMasks.add(0);
3707                    }
3708                }
3709            }
3710        }
3711    }
3712    return NO_ERROR;
3713}
3714
3715status_t AudioPolicyManager::checkInputsForDevice(audio_devices_t device,
3716                                                      audio_policy_dev_state_t state,
3717                                                      SortedVector<audio_io_handle_t>& inputs,
3718                                                      const String8 address)
3719{
3720    sp<AudioInputDescriptor> desc;
3721    if (state == AUDIO_POLICY_DEVICE_STATE_AVAILABLE) {
3722        // first list already open inputs that can be routed to this device
3723        for (size_t input_index = 0; input_index < mInputs.size(); input_index++) {
3724            desc = mInputs.valueAt(input_index);
3725            if (desc->mProfile->mSupportedDevices.types() & (device & ~AUDIO_DEVICE_BIT_IN)) {
3726                ALOGV("checkInputsForDevice(): adding opened input %d", mInputs.keyAt(input_index));
3727               inputs.add(mInputs.keyAt(input_index));
3728            }
3729        }
3730
3731        // then look for input profiles that can be routed to this device
3732        SortedVector< sp<IOProfile> > profiles;
3733        for (size_t module_idx = 0; module_idx < mHwModules.size(); module_idx++)
3734        {
3735            if (mHwModules[module_idx]->mHandle == 0) {
3736                continue;
3737            }
3738            for (size_t profile_index = 0;
3739                 profile_index < mHwModules[module_idx]->mInputProfiles.size();
3740                 profile_index++)
3741            {
3742                sp<IOProfile> profile = mHwModules[module_idx]->mInputProfiles[profile_index];
3743
3744                if (profile->mSupportedDevices.types() & (device & ~AUDIO_DEVICE_BIT_IN)) {
3745                    if (!deviceDistinguishesOnAddress(device) ||
3746                            address == profile->mSupportedDevices[0]->mAddress) {
3747                        profiles.add(profile);
3748                        ALOGV("checkInputsForDevice(): adding profile %zu from module %zu",
3749                              profile_index, module_idx);
3750                    }
3751                }
3752            }
3753        }
3754
3755        if (profiles.isEmpty() && inputs.isEmpty()) {
3756            ALOGW("checkInputsForDevice(): No input available for device 0x%X", device);
3757            return BAD_VALUE;
3758        }
3759
3760        // open inputs for matching profiles if needed. Direct inputs are also opened to
3761        // query for dynamic parameters and will be closed later by setDeviceConnectionState()
3762        for (ssize_t profile_index = 0; profile_index < (ssize_t)profiles.size(); profile_index++) {
3763
3764            sp<IOProfile> profile = profiles[profile_index];
3765            // nothing to do if one input is already opened for this profile
3766            size_t input_index;
3767            for (input_index = 0; input_index < mInputs.size(); input_index++) {
3768                desc = mInputs.valueAt(input_index);
3769                if (desc->mProfile == profile) {
3770                    break;
3771                }
3772            }
3773            if (input_index != mInputs.size()) {
3774                continue;
3775            }
3776
3777            ALOGV("opening input for device 0x%X with params %s", device, address.string());
3778            desc = new AudioInputDescriptor(profile);
3779            desc->mDevice = device;
3780            audio_config_t config = AUDIO_CONFIG_INITIALIZER;
3781            config.sample_rate = desc->mSamplingRate;
3782            config.channel_mask = desc->mChannelMask;
3783            config.format = desc->mFormat;
3784            audio_io_handle_t input = AUDIO_IO_HANDLE_NONE;
3785            status_t status = mpClientInterface->openInput(profile->mModule->mHandle,
3786                                                           &input,
3787                                                           &config,
3788                                                           &desc->mDevice,
3789                                                           address,
3790                                                           AUDIO_SOURCE_MIC,
3791                                                           AUDIO_INPUT_FLAG_NONE /*FIXME*/);
3792
3793            if (status == NO_ERROR) {
3794                desc->mSamplingRate = config.sample_rate;
3795                desc->mChannelMask = config.channel_mask;
3796                desc->mFormat = config.format;
3797
3798                if (!address.isEmpty()) {
3799                    char *param = audio_device_address_to_parameter(device, address);
3800                    mpClientInterface->setParameters(input, String8(param));
3801                    free(param);
3802                }
3803
3804                // Here is where we step through and resolve any "dynamic" fields
3805                String8 reply;
3806                char *value;
3807                if (profile->mSamplingRates[0] == 0) {
3808                    reply = mpClientInterface->getParameters(input,
3809                                            String8(AUDIO_PARAMETER_STREAM_SUP_SAMPLING_RATES));
3810                    ALOGV("checkInputsForDevice() direct input sup sampling rates %s",
3811                              reply.string());
3812                    value = strpbrk((char *)reply.string(), "=");
3813                    if (value != NULL) {
3814                        profile->loadSamplingRates(value + 1);
3815                    }
3816                }
3817                if (profile->mFormats[0] == AUDIO_FORMAT_DEFAULT) {
3818                    reply = mpClientInterface->getParameters(input,
3819                                                   String8(AUDIO_PARAMETER_STREAM_SUP_FORMATS));
3820                    ALOGV("checkInputsForDevice() direct input sup formats %s", reply.string());
3821                    value = strpbrk((char *)reply.string(), "=");
3822                    if (value != NULL) {
3823                        profile->loadFormats(value + 1);
3824                    }
3825                }
3826                if (profile->mChannelMasks[0] == 0) {
3827                    reply = mpClientInterface->getParameters(input,
3828                                                  String8(AUDIO_PARAMETER_STREAM_SUP_CHANNELS));
3829                    ALOGV("checkInputsForDevice() direct input sup channel masks %s",
3830                              reply.string());
3831                    value = strpbrk((char *)reply.string(), "=");
3832                    if (value != NULL) {
3833                        profile->loadInChannels(value + 1);
3834                    }
3835                }
3836                if (((profile->mSamplingRates[0] == 0) && (profile->mSamplingRates.size() < 2)) ||
3837                     ((profile->mFormats[0] == 0) && (profile->mFormats.size() < 2)) ||
3838                     ((profile->mChannelMasks[0] == 0) && (profile->mChannelMasks.size() < 2))) {
3839                    ALOGW("checkInputsForDevice() direct input missing param");
3840                    mpClientInterface->closeInput(input);
3841                    input = AUDIO_IO_HANDLE_NONE;
3842                }
3843
3844                if (input != 0) {
3845                    addInput(input, desc);
3846                }
3847            } // endif input != 0
3848
3849            if (input == AUDIO_IO_HANDLE_NONE) {
3850                ALOGW("checkInputsForDevice() could not open input for device 0x%X", device);
3851                profiles.removeAt(profile_index);
3852                profile_index--;
3853            } else {
3854                inputs.add(input);
3855                ALOGV("checkInputsForDevice(): adding input %d", input);
3856            }
3857        } // end scan profiles
3858
3859        if (profiles.isEmpty()) {
3860            ALOGW("checkInputsForDevice(): No input available for device 0x%X", device);
3861            return BAD_VALUE;
3862        }
3863    } else {
3864        // Disconnect
3865        // check if one opened input is not needed any more after disconnecting one device
3866        for (size_t input_index = 0; input_index < mInputs.size(); input_index++) {
3867            desc = mInputs.valueAt(input_index);
3868            if (!(desc->mProfile->mSupportedDevices.types() & mAvailableInputDevices.types() &
3869                    ~AUDIO_DEVICE_BIT_IN)) {
3870                ALOGV("checkInputsForDevice(): disconnecting adding input %d",
3871                      mInputs.keyAt(input_index));
3872                inputs.add(mInputs.keyAt(input_index));
3873            }
3874        }
3875        // Clear any profiles associated with the disconnected device.
3876        for (size_t module_index = 0; module_index < mHwModules.size(); module_index++) {
3877            if (mHwModules[module_index]->mHandle == 0) {
3878                continue;
3879            }
3880            for (size_t profile_index = 0;
3881                 profile_index < mHwModules[module_index]->mInputProfiles.size();
3882                 profile_index++) {
3883                sp<IOProfile> profile = mHwModules[module_index]->mInputProfiles[profile_index];
3884                if (profile->mSupportedDevices.types() & device & ~AUDIO_DEVICE_BIT_IN) {
3885                    ALOGV("checkInputsForDevice(): clearing direct input profile %zu on module %zu",
3886                          profile_index, module_index);
3887                    if (profile->mSamplingRates[0] == 0) {
3888                        profile->mSamplingRates.clear();
3889                        profile->mSamplingRates.add(0);
3890                    }
3891                    if (profile->mFormats[0] == AUDIO_FORMAT_DEFAULT) {
3892                        profile->mFormats.clear();
3893                        profile->mFormats.add(AUDIO_FORMAT_DEFAULT);
3894                    }
3895                    if (profile->mChannelMasks[0] == 0) {
3896                        profile->mChannelMasks.clear();
3897                        profile->mChannelMasks.add(0);
3898                    }
3899                }
3900            }
3901        }
3902    } // end disconnect
3903
3904    return NO_ERROR;
3905}
3906
3907
3908void AudioPolicyManager::closeOutput(audio_io_handle_t output)
3909{
3910    ALOGV("closeOutput(%d)", output);
3911
3912    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
3913    if (outputDesc == NULL) {
3914        ALOGW("closeOutput() unknown output %d", output);
3915        return;
3916    }
3917
3918    for (size_t i = 0; i < mPolicyMixes.size(); i++) {
3919        if (mPolicyMixes[i]->mOutput == outputDesc) {
3920            mPolicyMixes[i]->mOutput.clear();
3921        }
3922    }
3923
3924    // look for duplicated outputs connected to the output being removed.
3925    for (size_t i = 0; i < mOutputs.size(); i++) {
3926        sp<AudioOutputDescriptor> dupOutputDesc = mOutputs.valueAt(i);
3927        if (dupOutputDesc->isDuplicated() &&
3928                (dupOutputDesc->mOutput1 == outputDesc ||
3929                dupOutputDesc->mOutput2 == outputDesc)) {
3930            sp<AudioOutputDescriptor> outputDesc2;
3931            if (dupOutputDesc->mOutput1 == outputDesc) {
3932                outputDesc2 = dupOutputDesc->mOutput2;
3933            } else {
3934                outputDesc2 = dupOutputDesc->mOutput1;
3935            }
3936            // As all active tracks on duplicated output will be deleted,
3937            // and as they were also referenced on the other output, the reference
3938            // count for their stream type must be adjusted accordingly on
3939            // the other output.
3940            for (int j = 0; j < AUDIO_STREAM_CNT; j++) {
3941                int refCount = dupOutputDesc->mRefCount[j];
3942                outputDesc2->changeRefCount((audio_stream_type_t)j,-refCount);
3943            }
3944            audio_io_handle_t duplicatedOutput = mOutputs.keyAt(i);
3945            ALOGV("closeOutput() closing also duplicated output %d", duplicatedOutput);
3946
3947            mpClientInterface->closeOutput(duplicatedOutput);
3948            mOutputs.removeItem(duplicatedOutput);
3949        }
3950    }
3951
3952    nextAudioPortGeneration();
3953
3954    ssize_t index = mAudioPatches.indexOfKey(outputDesc->mPatchHandle);
3955    if (index >= 0) {
3956        sp<AudioPatch> patchDesc = mAudioPatches.valueAt(index);
3957        status_t status = mpClientInterface->releaseAudioPatch(patchDesc->mAfPatchHandle, 0);
3958        mAudioPatches.removeItemsAt(index);
3959        mpClientInterface->onAudioPatchListUpdate();
3960    }
3961
3962    AudioParameter param;
3963    param.add(String8("closing"), String8("true"));
3964    mpClientInterface->setParameters(output, param.toString());
3965
3966    mpClientInterface->closeOutput(output);
3967    mOutputs.removeItem(output);
3968    mPreviousOutputs = mOutputs;
3969}
3970
3971void AudioPolicyManager::closeInput(audio_io_handle_t input)
3972{
3973    ALOGV("closeInput(%d)", input);
3974
3975    sp<AudioInputDescriptor> inputDesc = mInputs.valueFor(input);
3976    if (inputDesc == NULL) {
3977        ALOGW("closeInput() unknown input %d", input);
3978        return;
3979    }
3980
3981    nextAudioPortGeneration();
3982
3983    ssize_t index = mAudioPatches.indexOfKey(inputDesc->mPatchHandle);
3984    if (index >= 0) {
3985        sp<AudioPatch> patchDesc = mAudioPatches.valueAt(index);
3986        status_t status = mpClientInterface->releaseAudioPatch(patchDesc->mAfPatchHandle, 0);
3987        mAudioPatches.removeItemsAt(index);
3988        mpClientInterface->onAudioPatchListUpdate();
3989    }
3990
3991    mpClientInterface->closeInput(input);
3992    mInputs.removeItem(input);
3993}
3994
3995SortedVector<audio_io_handle_t> AudioPolicyManager::getOutputsForDevice(audio_devices_t device,
3996                        DefaultKeyedVector<audio_io_handle_t, sp<AudioOutputDescriptor> > openOutputs)
3997{
3998    SortedVector<audio_io_handle_t> outputs;
3999
4000    ALOGVV("getOutputsForDevice() device %04x", device);
4001    for (size_t i = 0; i < openOutputs.size(); i++) {
4002        ALOGVV("output %d isDuplicated=%d device=%04x",
4003                i, openOutputs.valueAt(i)->isDuplicated(), openOutputs.valueAt(i)->supportedDevices());
4004        if ((device & openOutputs.valueAt(i)->supportedDevices()) == device) {
4005            ALOGVV("getOutputsForDevice() found output %d", openOutputs.keyAt(i));
4006            outputs.add(openOutputs.keyAt(i));
4007        }
4008    }
4009    return outputs;
4010}
4011
4012bool AudioPolicyManager::vectorsEqual(SortedVector<audio_io_handle_t>& outputs1,
4013                                   SortedVector<audio_io_handle_t>& outputs2)
4014{
4015    if (outputs1.size() != outputs2.size()) {
4016        return false;
4017    }
4018    for (size_t i = 0; i < outputs1.size(); i++) {
4019        if (outputs1[i] != outputs2[i]) {
4020            return false;
4021        }
4022    }
4023    return true;
4024}
4025
4026void AudioPolicyManager::checkOutputForStrategy(routing_strategy strategy)
4027{
4028    audio_devices_t oldDevice = getDeviceForStrategy(strategy, true /*fromCache*/);
4029    audio_devices_t newDevice = getDeviceForStrategy(strategy, false /*fromCache*/);
4030    SortedVector<audio_io_handle_t> srcOutputs = getOutputsForDevice(oldDevice, mPreviousOutputs);
4031    SortedVector<audio_io_handle_t> dstOutputs = getOutputsForDevice(newDevice, mOutputs);
4032
4033    if (!vectorsEqual(srcOutputs,dstOutputs)) {
4034        ALOGV("checkOutputForStrategy() strategy %d, moving from output %d to output %d",
4035              strategy, srcOutputs[0], dstOutputs[0]);
4036        // mute strategy while moving tracks from one output to another
4037        for (size_t i = 0; i < srcOutputs.size(); i++) {
4038            sp<AudioOutputDescriptor> desc = mOutputs.valueFor(srcOutputs[i]);
4039            if (desc->isStrategyActive(strategy)) {
4040                setStrategyMute(strategy, true, srcOutputs[i]);
4041                setStrategyMute(strategy, false, srcOutputs[i], MUTE_TIME_MS, newDevice);
4042            }
4043        }
4044
4045        // Move effects associated to this strategy from previous output to new output
4046        if (strategy == STRATEGY_MEDIA) {
4047            audio_io_handle_t fxOutput = selectOutputForEffects(dstOutputs);
4048            SortedVector<audio_io_handle_t> moved;
4049            for (size_t i = 0; i < mEffects.size(); i++) {
4050                sp<EffectDescriptor> effectDesc = mEffects.valueAt(i);
4051                if (effectDesc->mSession == AUDIO_SESSION_OUTPUT_MIX &&
4052                        effectDesc->mIo != fxOutput) {
4053                    if (moved.indexOf(effectDesc->mIo) < 0) {
4054                        ALOGV("checkOutputForStrategy() moving effect %d to output %d",
4055                              mEffects.keyAt(i), fxOutput);
4056                        mpClientInterface->moveEffects(AUDIO_SESSION_OUTPUT_MIX, effectDesc->mIo,
4057                                                       fxOutput);
4058                        moved.add(effectDesc->mIo);
4059                    }
4060                    effectDesc->mIo = fxOutput;
4061                }
4062            }
4063        }
4064        // Move tracks associated to this strategy from previous output to new output
4065        for (int i = 0; i < AUDIO_STREAM_CNT; i++) {
4066            if (i == AUDIO_STREAM_PATCH) {
4067                continue;
4068            }
4069            if (getStrategy((audio_stream_type_t)i) == strategy) {
4070                mpClientInterface->invalidateStream((audio_stream_type_t)i);
4071            }
4072        }
4073    }
4074}
4075
4076void AudioPolicyManager::checkOutputForAllStrategies()
4077{
4078    if (mForceUse[AUDIO_POLICY_FORCE_FOR_SYSTEM] == AUDIO_POLICY_FORCE_SYSTEM_ENFORCED)
4079        checkOutputForStrategy(STRATEGY_ENFORCED_AUDIBLE);
4080    checkOutputForStrategy(STRATEGY_PHONE);
4081    if (mForceUse[AUDIO_POLICY_FORCE_FOR_SYSTEM] != AUDIO_POLICY_FORCE_SYSTEM_ENFORCED)
4082        checkOutputForStrategy(STRATEGY_ENFORCED_AUDIBLE);
4083    checkOutputForStrategy(STRATEGY_SONIFICATION);
4084    checkOutputForStrategy(STRATEGY_SONIFICATION_RESPECTFUL);
4085    checkOutputForStrategy(STRATEGY_ACCESSIBILITY);
4086    checkOutputForStrategy(STRATEGY_MEDIA);
4087    checkOutputForStrategy(STRATEGY_DTMF);
4088    checkOutputForStrategy(STRATEGY_REROUTING);
4089}
4090
4091audio_io_handle_t AudioPolicyManager::getA2dpOutput()
4092{
4093    for (size_t i = 0; i < mOutputs.size(); i++) {
4094        sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(i);
4095        if (!outputDesc->isDuplicated() && outputDesc->device() & AUDIO_DEVICE_OUT_ALL_A2DP) {
4096            return mOutputs.keyAt(i);
4097        }
4098    }
4099
4100    return 0;
4101}
4102
4103void AudioPolicyManager::checkA2dpSuspend()
4104{
4105    audio_io_handle_t a2dpOutput = getA2dpOutput();
4106    if (a2dpOutput == 0) {
4107        mA2dpSuspended = false;
4108        return;
4109    }
4110
4111    bool isScoConnected =
4112            ((mAvailableInputDevices.types() & AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET &
4113                    ~AUDIO_DEVICE_BIT_IN) != 0) ||
4114            ((mAvailableOutputDevices.types() & AUDIO_DEVICE_OUT_ALL_SCO) != 0);
4115    // suspend A2DP output if:
4116    //      (NOT already suspended) &&
4117    //      ((SCO device is connected &&
4118    //       (forced usage for communication || for record is SCO))) ||
4119    //      (phone state is ringing || in call)
4120    //
4121    // restore A2DP output if:
4122    //      (Already suspended) &&
4123    //      ((SCO device is NOT connected ||
4124    //       (forced usage NOT for communication && NOT for record is SCO))) &&
4125    //      (phone state is NOT ringing && NOT in call)
4126    //
4127    if (mA2dpSuspended) {
4128        if ((!isScoConnected ||
4129             ((mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION] != AUDIO_POLICY_FORCE_BT_SCO) &&
4130              (mForceUse[AUDIO_POLICY_FORCE_FOR_RECORD] != AUDIO_POLICY_FORCE_BT_SCO))) &&
4131             ((mPhoneState != AUDIO_MODE_IN_CALL) &&
4132              (mPhoneState != AUDIO_MODE_RINGTONE))) {
4133
4134            mpClientInterface->restoreOutput(a2dpOutput);
4135            mA2dpSuspended = false;
4136        }
4137    } else {
4138        if ((isScoConnected &&
4139             ((mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION] == AUDIO_POLICY_FORCE_BT_SCO) ||
4140              (mForceUse[AUDIO_POLICY_FORCE_FOR_RECORD] == AUDIO_POLICY_FORCE_BT_SCO))) ||
4141             ((mPhoneState == AUDIO_MODE_IN_CALL) ||
4142              (mPhoneState == AUDIO_MODE_RINGTONE))) {
4143
4144            mpClientInterface->suspendOutput(a2dpOutput);
4145            mA2dpSuspended = true;
4146        }
4147    }
4148}
4149
4150audio_devices_t AudioPolicyManager::getNewOutputDevice(audio_io_handle_t output, bool fromCache)
4151{
4152    audio_devices_t device = AUDIO_DEVICE_NONE;
4153
4154    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
4155
4156    ssize_t index = mAudioPatches.indexOfKey(outputDesc->mPatchHandle);
4157    if (index >= 0) {
4158        sp<AudioPatch> patchDesc = mAudioPatches.valueAt(index);
4159        if (patchDesc->mUid != mUidCached) {
4160            ALOGV("getNewOutputDevice() device %08x forced by patch %d",
4161                  outputDesc->device(), outputDesc->mPatchHandle);
4162            return outputDesc->device();
4163        }
4164    }
4165
4166    // check the following by order of priority to request a routing change if necessary:
4167    // 1: the strategy enforced audible is active and enforced on the output:
4168    //      use device for strategy enforced audible
4169    // 2: we are in call or the strategy phone is active on the output:
4170    //      use device for strategy phone
4171    // 3: the strategy for enforced audible is active but not enforced on the output:
4172    //      use the device for strategy enforced audible
4173    // 4: the strategy sonification is active on the output:
4174    //      use device for strategy sonification
4175    // 5: the strategy "respectful" sonification is active on the output:
4176    //      use device for strategy "respectful" sonification
4177    // 6: the strategy accessibility is active on the output:
4178    //      use device for strategy accessibility
4179    // 7: the strategy media is active on the output:
4180    //      use device for strategy media
4181    // 8: the strategy DTMF is active on the output:
4182    //      use device for strategy DTMF
4183    // 9: the strategy for beacon, a.k.a. "transmitted through speaker" is active on the output:
4184    //      use device for strategy t-t-s
4185    if (outputDesc->isStrategyActive(STRATEGY_ENFORCED_AUDIBLE) &&
4186        mForceUse[AUDIO_POLICY_FORCE_FOR_SYSTEM] == AUDIO_POLICY_FORCE_SYSTEM_ENFORCED) {
4187        device = getDeviceForStrategy(STRATEGY_ENFORCED_AUDIBLE, fromCache);
4188    } else if (isInCall() ||
4189                    outputDesc->isStrategyActive(STRATEGY_PHONE)) {
4190        device = getDeviceForStrategy(STRATEGY_PHONE, fromCache);
4191    } else if (outputDesc->isStrategyActive(STRATEGY_ENFORCED_AUDIBLE)) {
4192        device = getDeviceForStrategy(STRATEGY_ENFORCED_AUDIBLE, fromCache);
4193    } else if (outputDesc->isStrategyActive(STRATEGY_SONIFICATION)) {
4194        device = getDeviceForStrategy(STRATEGY_SONIFICATION, fromCache);
4195    } else if (outputDesc->isStrategyActive(STRATEGY_SONIFICATION_RESPECTFUL)) {
4196        device = getDeviceForStrategy(STRATEGY_SONIFICATION_RESPECTFUL, fromCache);
4197    } else if (outputDesc->isStrategyActive(STRATEGY_ACCESSIBILITY)) {
4198        device = getDeviceForStrategy(STRATEGY_ACCESSIBILITY, fromCache);
4199    } else if (outputDesc->isStrategyActive(STRATEGY_MEDIA)) {
4200        device = getDeviceForStrategy(STRATEGY_MEDIA, fromCache);
4201    } else if (outputDesc->isStrategyActive(STRATEGY_DTMF)) {
4202        device = getDeviceForStrategy(STRATEGY_DTMF, fromCache);
4203    } else if (outputDesc->isStrategyActive(STRATEGY_TRANSMITTED_THROUGH_SPEAKER)) {
4204        device = getDeviceForStrategy(STRATEGY_TRANSMITTED_THROUGH_SPEAKER, fromCache);
4205    } else if (outputDesc->isStrategyActive(STRATEGY_REROUTING)) {
4206        device = getDeviceForStrategy(STRATEGY_REROUTING, fromCache);
4207    }
4208
4209    ALOGV("getNewOutputDevice() selected device %x", device);
4210    return device;
4211}
4212
4213audio_devices_t AudioPolicyManager::getNewInputDevice(audio_io_handle_t input)
4214{
4215    sp<AudioInputDescriptor> inputDesc = mInputs.valueFor(input);
4216
4217    ssize_t index = mAudioPatches.indexOfKey(inputDesc->mPatchHandle);
4218    if (index >= 0) {
4219        sp<AudioPatch> patchDesc = mAudioPatches.valueAt(index);
4220        if (patchDesc->mUid != mUidCached) {
4221            ALOGV("getNewInputDevice() device %08x forced by patch %d",
4222                  inputDesc->mDevice, inputDesc->mPatchHandle);
4223            return inputDesc->mDevice;
4224        }
4225    }
4226
4227    audio_devices_t device = getDeviceForInputSource(inputDesc->mInputSource);
4228
4229    ALOGV("getNewInputDevice() selected device %x", device);
4230    return device;
4231}
4232
4233uint32_t AudioPolicyManager::getStrategyForStream(audio_stream_type_t stream) {
4234    return (uint32_t)getStrategy(stream);
4235}
4236
4237audio_devices_t AudioPolicyManager::getDevicesForStream(audio_stream_type_t stream) {
4238    // By checking the range of stream before calling getStrategy, we avoid
4239    // getStrategy's behavior for invalid streams.  getStrategy would do a ALOGE
4240    // and then return STRATEGY_MEDIA, but we want to return the empty set.
4241    if (stream < (audio_stream_type_t) 0 || stream >= AUDIO_STREAM_PUBLIC_CNT) {
4242        return AUDIO_DEVICE_NONE;
4243    }
4244    audio_devices_t devices;
4245    AudioPolicyManager::routing_strategy strategy = getStrategy(stream);
4246    devices = getDeviceForStrategy(strategy, true /*fromCache*/);
4247    SortedVector<audio_io_handle_t> outputs = getOutputsForDevice(devices, mOutputs);
4248    for (size_t i = 0; i < outputs.size(); i++) {
4249        sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(outputs[i]);
4250        if (outputDesc->isStrategyActive(strategy)) {
4251            devices = outputDesc->device();
4252            break;
4253        }
4254    }
4255
4256    /*Filter SPEAKER_SAFE out of results, as AudioService doesn't know about it
4257      and doesn't really need to.*/
4258    if (devices & AUDIO_DEVICE_OUT_SPEAKER_SAFE) {
4259        devices |= AUDIO_DEVICE_OUT_SPEAKER;
4260        devices &= ~AUDIO_DEVICE_OUT_SPEAKER_SAFE;
4261    }
4262
4263    return devices;
4264}
4265
4266AudioPolicyManager::routing_strategy AudioPolicyManager::getStrategy(
4267        audio_stream_type_t stream) {
4268
4269    ALOG_ASSERT(stream != AUDIO_STREAM_PATCH,"getStrategy() called for AUDIO_STREAM_PATCH");
4270
4271    // stream to strategy mapping
4272    switch (stream) {
4273    case AUDIO_STREAM_VOICE_CALL:
4274    case AUDIO_STREAM_BLUETOOTH_SCO:
4275        return STRATEGY_PHONE;
4276    case AUDIO_STREAM_RING:
4277    case AUDIO_STREAM_ALARM:
4278        return STRATEGY_SONIFICATION;
4279    case AUDIO_STREAM_NOTIFICATION:
4280        return STRATEGY_SONIFICATION_RESPECTFUL;
4281    case AUDIO_STREAM_DTMF:
4282        return STRATEGY_DTMF;
4283    default:
4284        ALOGE("unknown stream type %d", stream);
4285    case AUDIO_STREAM_SYSTEM:
4286        // NOTE: SYSTEM stream uses MEDIA strategy because muting music and switching outputs
4287        // while key clicks are played produces a poor result
4288    case AUDIO_STREAM_MUSIC:
4289        return STRATEGY_MEDIA;
4290    case AUDIO_STREAM_ENFORCED_AUDIBLE:
4291        return STRATEGY_ENFORCED_AUDIBLE;
4292    case AUDIO_STREAM_TTS:
4293        return STRATEGY_TRANSMITTED_THROUGH_SPEAKER;
4294    case AUDIO_STREAM_ACCESSIBILITY:
4295        return STRATEGY_ACCESSIBILITY;
4296    case AUDIO_STREAM_REROUTING:
4297        return STRATEGY_REROUTING;
4298    }
4299}
4300
4301uint32_t AudioPolicyManager::getStrategyForAttr(const audio_attributes_t *attr) {
4302    // flags to strategy mapping
4303    if ((attr->flags & AUDIO_FLAG_BEACON) == AUDIO_FLAG_BEACON) {
4304        return (uint32_t) STRATEGY_TRANSMITTED_THROUGH_SPEAKER;
4305    }
4306    if ((attr->flags & AUDIO_FLAG_AUDIBILITY_ENFORCED) == AUDIO_FLAG_AUDIBILITY_ENFORCED) {
4307        return (uint32_t) STRATEGY_ENFORCED_AUDIBLE;
4308    }
4309
4310    // usage to strategy mapping
4311    switch (attr->usage) {
4312    case AUDIO_USAGE_ASSISTANCE_ACCESSIBILITY:
4313        if (isStreamActive(AUDIO_STREAM_RING) || isStreamActive(AUDIO_STREAM_ALARM)) {
4314            return (uint32_t) STRATEGY_SONIFICATION;
4315        }
4316        if (isInCall()) {
4317            return (uint32_t) STRATEGY_PHONE;
4318        }
4319        return (uint32_t) STRATEGY_ACCESSIBILITY;
4320
4321    case AUDIO_USAGE_MEDIA:
4322    case AUDIO_USAGE_GAME:
4323    case AUDIO_USAGE_ASSISTANCE_NAVIGATION_GUIDANCE:
4324    case AUDIO_USAGE_ASSISTANCE_SONIFICATION:
4325        return (uint32_t) STRATEGY_MEDIA;
4326
4327    case AUDIO_USAGE_VOICE_COMMUNICATION:
4328        return (uint32_t) STRATEGY_PHONE;
4329
4330    case AUDIO_USAGE_VOICE_COMMUNICATION_SIGNALLING:
4331        return (uint32_t) STRATEGY_DTMF;
4332
4333    case AUDIO_USAGE_ALARM:
4334    case AUDIO_USAGE_NOTIFICATION_TELEPHONY_RINGTONE:
4335        return (uint32_t) STRATEGY_SONIFICATION;
4336
4337    case AUDIO_USAGE_NOTIFICATION:
4338    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_REQUEST:
4339    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_INSTANT:
4340    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_DELAYED:
4341    case AUDIO_USAGE_NOTIFICATION_EVENT:
4342        return (uint32_t) STRATEGY_SONIFICATION_RESPECTFUL;
4343
4344    case AUDIO_USAGE_UNKNOWN:
4345    default:
4346        return (uint32_t) STRATEGY_MEDIA;
4347    }
4348}
4349
4350void AudioPolicyManager::handleNotificationRoutingForStream(audio_stream_type_t stream) {
4351    switch(stream) {
4352    case AUDIO_STREAM_MUSIC:
4353        checkOutputForStrategy(STRATEGY_SONIFICATION_RESPECTFUL);
4354        updateDevicesAndOutputs();
4355        break;
4356    default:
4357        break;
4358    }
4359}
4360
4361bool AudioPolicyManager::isAnyOutputActive(audio_stream_type_t streamToIgnore) {
4362    for (size_t s = 0 ; s < AUDIO_STREAM_CNT ; s++) {
4363        if (s == (size_t) streamToIgnore) {
4364            continue;
4365        }
4366        for (size_t i = 0; i < mOutputs.size(); i++) {
4367            const sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(i);
4368            if (outputDesc->mRefCount[s] != 0) {
4369                return true;
4370            }
4371        }
4372    }
4373    return false;
4374}
4375
4376uint32_t AudioPolicyManager::handleEventForBeacon(int event) {
4377    switch(event) {
4378    case STARTING_OUTPUT:
4379        mBeaconMuteRefCount++;
4380        break;
4381    case STOPPING_OUTPUT:
4382        if (mBeaconMuteRefCount > 0) {
4383            mBeaconMuteRefCount--;
4384        }
4385        break;
4386    case STARTING_BEACON:
4387        mBeaconPlayingRefCount++;
4388        break;
4389    case STOPPING_BEACON:
4390        if (mBeaconPlayingRefCount > 0) {
4391            mBeaconPlayingRefCount--;
4392        }
4393        break;
4394    }
4395
4396    if (mBeaconMuteRefCount > 0) {
4397        // any playback causes beacon to be muted
4398        return setBeaconMute(true);
4399    } else {
4400        // no other playback: unmute when beacon starts playing, mute when it stops
4401        return setBeaconMute(mBeaconPlayingRefCount == 0);
4402    }
4403}
4404
4405uint32_t AudioPolicyManager::setBeaconMute(bool mute) {
4406    ALOGV("setBeaconMute(%d) mBeaconMuteRefCount=%d mBeaconPlayingRefCount=%d",
4407            mute, mBeaconMuteRefCount, mBeaconPlayingRefCount);
4408    // keep track of muted state to avoid repeating mute/unmute operations
4409    if (mBeaconMuted != mute) {
4410        // mute/unmute AUDIO_STREAM_TTS on all outputs
4411        ALOGV("\t muting %d", mute);
4412        uint32_t maxLatency = 0;
4413        for (size_t i = 0; i < mOutputs.size(); i++) {
4414            sp<AudioOutputDescriptor> desc = mOutputs.valueAt(i);
4415            setStreamMute(AUDIO_STREAM_TTS, mute/*on*/,
4416                    desc->mIoHandle,
4417                    0 /*delay*/, AUDIO_DEVICE_NONE);
4418            const uint32_t latency = desc->latency() * 2;
4419            if (latency > maxLatency) {
4420                maxLatency = latency;
4421            }
4422        }
4423        mBeaconMuted = mute;
4424        return maxLatency;
4425    }
4426    return 0;
4427}
4428
4429audio_devices_t AudioPolicyManager::getDeviceForStrategy(routing_strategy strategy,
4430                                                             bool fromCache)
4431{
4432    uint32_t device = AUDIO_DEVICE_NONE;
4433
4434    if (fromCache) {
4435        ALOGVV("getDeviceForStrategy() from cache strategy %d, device %x",
4436              strategy, mDeviceForStrategy[strategy]);
4437        return mDeviceForStrategy[strategy];
4438    }
4439    audio_devices_t availableOutputDeviceTypes = mAvailableOutputDevices.types();
4440    switch (strategy) {
4441
4442    case STRATEGY_TRANSMITTED_THROUGH_SPEAKER:
4443        device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPEAKER;
4444        if (!device) {
4445            ALOGE("getDeviceForStrategy() no device found for "\
4446                    "STRATEGY_TRANSMITTED_THROUGH_SPEAKER");
4447        }
4448        break;
4449
4450    case STRATEGY_SONIFICATION_RESPECTFUL:
4451        if (isInCall()) {
4452            device = getDeviceForStrategy(STRATEGY_SONIFICATION, false /*fromCache*/);
4453        } else if (isStreamActiveRemotely(AUDIO_STREAM_MUSIC,
4454                SONIFICATION_RESPECTFUL_AFTER_MUSIC_DELAY)) {
4455            // while media is playing on a remote device, use the the sonification behavior.
4456            // Note that we test this usecase before testing if media is playing because
4457            //   the isStreamActive() method only informs about the activity of a stream, not
4458            //   if it's for local playback. Note also that we use the same delay between both tests
4459            device = getDeviceForStrategy(STRATEGY_SONIFICATION, false /*fromCache*/);
4460            //user "safe" speaker if available instead of normal speaker to avoid triggering
4461            //other acoustic safety mechanisms for notification
4462            if (device == AUDIO_DEVICE_OUT_SPEAKER && (availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPEAKER_SAFE))
4463                device = AUDIO_DEVICE_OUT_SPEAKER_SAFE;
4464        } else if (isStreamActive(AUDIO_STREAM_MUSIC, SONIFICATION_RESPECTFUL_AFTER_MUSIC_DELAY)) {
4465            // while media is playing (or has recently played), use the same device
4466            device = getDeviceForStrategy(STRATEGY_MEDIA, false /*fromCache*/);
4467        } else {
4468            // when media is not playing anymore, fall back on the sonification behavior
4469            device = getDeviceForStrategy(STRATEGY_SONIFICATION, false /*fromCache*/);
4470            //user "safe" speaker if available instead of normal speaker to avoid triggering
4471            //other acoustic safety mechanisms for notification
4472            if (device == AUDIO_DEVICE_OUT_SPEAKER && (availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPEAKER_SAFE))
4473                device = AUDIO_DEVICE_OUT_SPEAKER_SAFE;
4474        }
4475
4476        break;
4477
4478    case STRATEGY_DTMF:
4479        if (!isInCall()) {
4480            // when off call, DTMF strategy follows the same rules as MEDIA strategy
4481            device = getDeviceForStrategy(STRATEGY_MEDIA, false /*fromCache*/);
4482            break;
4483        }
4484        // when in call, DTMF and PHONE strategies follow the same rules
4485        // FALL THROUGH
4486
4487    case STRATEGY_PHONE:
4488        // Force use of only devices on primary output if:
4489        // - in call AND
4490        //   - cannot route from voice call RX OR
4491        //   - audio HAL version is < 3.0 and TX device is on the primary HW module
4492        if (mPhoneState == AUDIO_MODE_IN_CALL) {
4493            audio_devices_t txDevice = getDeviceForInputSource(AUDIO_SOURCE_VOICE_COMMUNICATION);
4494            sp<AudioOutputDescriptor> hwOutputDesc = mOutputs.valueFor(mPrimaryOutput);
4495            if (((mAvailableInputDevices.types() &
4496                    AUDIO_DEVICE_IN_TELEPHONY_RX & ~AUDIO_DEVICE_BIT_IN) == 0) ||
4497                    (((txDevice & availablePrimaryInputDevices() & ~AUDIO_DEVICE_BIT_IN) != 0) &&
4498                         (hwOutputDesc->getAudioPort()->mModule->mHalVersion <
4499                             AUDIO_DEVICE_API_VERSION_3_0))) {
4500                availableOutputDeviceTypes = availablePrimaryOutputDevices();
4501            }
4502        }
4503        // for phone strategy, we first consider the forced use and then the available devices by order
4504        // of priority
4505        switch (mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION]) {
4506        case AUDIO_POLICY_FORCE_BT_SCO:
4507            if (!isInCall() || strategy != STRATEGY_DTMF) {
4508                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_SCO_CARKIT;
4509                if (device) break;
4510            }
4511            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_SCO_HEADSET;
4512            if (device) break;
4513            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_SCO;
4514            if (device) break;
4515            // if SCO device is requested but no SCO device is available, fall back to default case
4516            // FALL THROUGH
4517
4518        default:    // FORCE_NONE
4519            // when not in a phone call, phone strategy should route STREAM_VOICE_CALL to A2DP
4520            if (!isInCall() &&
4521                    (mForceUse[AUDIO_POLICY_FORCE_FOR_MEDIA] != AUDIO_POLICY_FORCE_NO_BT_A2DP) &&
4522                    (getA2dpOutput() != 0)) {
4523                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP;
4524                if (device) break;
4525                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES;
4526                if (device) break;
4527            }
4528            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_WIRED_HEADPHONE;
4529            if (device) break;
4530            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_WIRED_HEADSET;
4531            if (device) break;
4532            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_DEVICE;
4533            if (device) break;
4534            if (mPhoneState != AUDIO_MODE_IN_CALL) {
4535                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_ACCESSORY;
4536                if (device) break;
4537                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_DGTL_DOCK_HEADSET;
4538                if (device) break;
4539                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_AUX_DIGITAL;
4540                if (device) break;
4541                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_ANLG_DOCK_HEADSET;
4542                if (device) break;
4543            }
4544            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_EARPIECE;
4545            if (device) break;
4546            device = mDefaultOutputDevice->mDeviceType;
4547            if (device == AUDIO_DEVICE_NONE) {
4548                ALOGE("getDeviceForStrategy() no device found for STRATEGY_PHONE");
4549            }
4550            break;
4551
4552        case AUDIO_POLICY_FORCE_SPEAKER:
4553            // when not in a phone call, phone strategy should route STREAM_VOICE_CALL to
4554            // A2DP speaker when forcing to speaker output
4555            if (!isInCall() &&
4556                    (mForceUse[AUDIO_POLICY_FORCE_FOR_MEDIA] != AUDIO_POLICY_FORCE_NO_BT_A2DP) &&
4557                    (getA2dpOutput() != 0)) {
4558                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_SPEAKER;
4559                if (device) break;
4560            }
4561            if (mPhoneState != AUDIO_MODE_IN_CALL) {
4562                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_ACCESSORY;
4563                if (device) break;
4564                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_DEVICE;
4565                if (device) break;
4566                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_DGTL_DOCK_HEADSET;
4567                if (device) break;
4568                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_AUX_DIGITAL;
4569                if (device) break;
4570                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_ANLG_DOCK_HEADSET;
4571                if (device) break;
4572            }
4573            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_LINE;
4574            if (device) break;
4575            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPEAKER;
4576            if (device) break;
4577            device = mDefaultOutputDevice->mDeviceType;
4578            if (device == AUDIO_DEVICE_NONE) {
4579                ALOGE("getDeviceForStrategy() no device found for STRATEGY_PHONE, FORCE_SPEAKER");
4580            }
4581            break;
4582        }
4583    break;
4584
4585    case STRATEGY_SONIFICATION:
4586
4587        // If incall, just select the STRATEGY_PHONE device: The rest of the behavior is handled by
4588        // handleIncallSonification().
4589        if (isInCall()) {
4590            device = getDeviceForStrategy(STRATEGY_PHONE, false /*fromCache*/);
4591            break;
4592        }
4593        // FALL THROUGH
4594
4595    case STRATEGY_ENFORCED_AUDIBLE:
4596        // strategy STRATEGY_ENFORCED_AUDIBLE uses same routing policy as STRATEGY_SONIFICATION
4597        // except:
4598        //   - when in call where it doesn't default to STRATEGY_PHONE behavior
4599        //   - in countries where not enforced in which case it follows STRATEGY_MEDIA
4600
4601        if ((strategy == STRATEGY_SONIFICATION) ||
4602                (mForceUse[AUDIO_POLICY_FORCE_FOR_SYSTEM] == AUDIO_POLICY_FORCE_SYSTEM_ENFORCED)) {
4603            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPEAKER;
4604            if (device == AUDIO_DEVICE_NONE) {
4605                ALOGE("getDeviceForStrategy() speaker device not found for STRATEGY_SONIFICATION");
4606            }
4607        }
4608        // The second device used for sonification is the same as the device used by media strategy
4609        // FALL THROUGH
4610
4611    // FIXME: STRATEGY_ACCESSIBILITY and STRATEGY_REROUTING follow STRATEGY_MEDIA for now
4612    case STRATEGY_ACCESSIBILITY:
4613        if (strategy == STRATEGY_ACCESSIBILITY) {
4614            // do not route accessibility prompts to a digital output currently configured with a
4615            // compressed format as they would likely not be mixed and dropped.
4616            for (size_t i = 0; i < mOutputs.size(); i++) {
4617                sp<AudioOutputDescriptor> desc = mOutputs.valueAt(i);
4618                audio_devices_t devices = desc->device() &
4619                    (AUDIO_DEVICE_OUT_HDMI | AUDIO_DEVICE_OUT_SPDIF | AUDIO_DEVICE_OUT_HDMI_ARC);
4620                if (desc->isActive() && !audio_is_linear_pcm(desc->mFormat) &&
4621                        devices != AUDIO_DEVICE_NONE) {
4622                    availableOutputDeviceTypes = availableOutputDeviceTypes & ~devices;
4623                }
4624            }
4625        }
4626        // FALL THROUGH
4627
4628    case STRATEGY_REROUTING:
4629    case STRATEGY_MEDIA: {
4630        uint32_t device2 = AUDIO_DEVICE_NONE;
4631        if (strategy != STRATEGY_SONIFICATION) {
4632            // no sonification on remote submix (e.g. WFD)
4633            if (mAvailableOutputDevices.getDevice(AUDIO_DEVICE_OUT_REMOTE_SUBMIX, String8("0")) != 0) {
4634                device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_REMOTE_SUBMIX;
4635            }
4636        }
4637        if ((device2 == AUDIO_DEVICE_NONE) &&
4638                (mForceUse[AUDIO_POLICY_FORCE_FOR_MEDIA] != AUDIO_POLICY_FORCE_NO_BT_A2DP) &&
4639                (getA2dpOutput() != 0)) {
4640            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP;
4641            if (device2 == AUDIO_DEVICE_NONE) {
4642                device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES;
4643            }
4644            if (device2 == AUDIO_DEVICE_NONE) {
4645                device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_SPEAKER;
4646            }
4647        }
4648        if ((device2 == AUDIO_DEVICE_NONE) &&
4649            (mForceUse[AUDIO_POLICY_FORCE_FOR_MEDIA] == AUDIO_POLICY_FORCE_SPEAKER)) {
4650            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPEAKER;
4651        }
4652        if (device2 == AUDIO_DEVICE_NONE) {
4653            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_WIRED_HEADPHONE;
4654        }
4655        if ((device2 == AUDIO_DEVICE_NONE)) {
4656            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_LINE;
4657        }
4658        if (device2 == AUDIO_DEVICE_NONE) {
4659            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_WIRED_HEADSET;
4660        }
4661        if (device2 == AUDIO_DEVICE_NONE) {
4662            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_ACCESSORY;
4663        }
4664        if (device2 == AUDIO_DEVICE_NONE) {
4665            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_DEVICE;
4666        }
4667        if (device2 == AUDIO_DEVICE_NONE) {
4668            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_DGTL_DOCK_HEADSET;
4669        }
4670        if ((device2 == AUDIO_DEVICE_NONE) && (strategy != STRATEGY_SONIFICATION)) {
4671            // no sonification on aux digital (e.g. HDMI)
4672            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_AUX_DIGITAL;
4673        }
4674        if ((device2 == AUDIO_DEVICE_NONE) &&
4675                (mForceUse[AUDIO_POLICY_FORCE_FOR_DOCK] == AUDIO_POLICY_FORCE_ANALOG_DOCK)) {
4676            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_ANLG_DOCK_HEADSET;
4677        }
4678        if (device2 == AUDIO_DEVICE_NONE) {
4679            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPEAKER;
4680        }
4681        int device3 = AUDIO_DEVICE_NONE;
4682        if (strategy == STRATEGY_MEDIA) {
4683            // ARC, SPDIF and AUX_LINE can co-exist with others.
4684            device3 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_HDMI_ARC;
4685            device3 |= (availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPDIF);
4686            device3 |= (availableOutputDeviceTypes & AUDIO_DEVICE_OUT_AUX_LINE);
4687        }
4688
4689        device2 |= device3;
4690        // device is DEVICE_OUT_SPEAKER if we come from case STRATEGY_SONIFICATION or
4691        // STRATEGY_ENFORCED_AUDIBLE, AUDIO_DEVICE_NONE otherwise
4692        device |= device2;
4693
4694        // If hdmi system audio mode is on, remove speaker out of output list.
4695        if ((strategy == STRATEGY_MEDIA) &&
4696            (mForceUse[AUDIO_POLICY_FORCE_FOR_HDMI_SYSTEM_AUDIO] ==
4697                AUDIO_POLICY_FORCE_HDMI_SYSTEM_AUDIO_ENFORCED)) {
4698            device &= ~AUDIO_DEVICE_OUT_SPEAKER;
4699        }
4700
4701        if (device) break;
4702        device = mDefaultOutputDevice->mDeviceType;
4703        if (device == AUDIO_DEVICE_NONE) {
4704            ALOGE("getDeviceForStrategy() no device found for STRATEGY_MEDIA");
4705        }
4706        } break;
4707
4708    default:
4709        ALOGW("getDeviceForStrategy() unknown strategy: %d", strategy);
4710        break;
4711    }
4712
4713    ALOGVV("getDeviceForStrategy() strategy %d, device %x", strategy, device);
4714    return device;
4715}
4716
4717void AudioPolicyManager::updateDevicesAndOutputs()
4718{
4719    for (int i = 0; i < NUM_STRATEGIES; i++) {
4720        mDeviceForStrategy[i] = getDeviceForStrategy((routing_strategy)i, false /*fromCache*/);
4721    }
4722    mPreviousOutputs = mOutputs;
4723}
4724
4725uint32_t AudioPolicyManager::checkDeviceMuteStrategies(sp<AudioOutputDescriptor> outputDesc,
4726                                                       audio_devices_t prevDevice,
4727                                                       uint32_t delayMs)
4728{
4729    // mute/unmute strategies using an incompatible device combination
4730    // if muting, wait for the audio in pcm buffer to be drained before proceeding
4731    // if unmuting, unmute only after the specified delay
4732    if (outputDesc->isDuplicated()) {
4733        return 0;
4734    }
4735
4736    uint32_t muteWaitMs = 0;
4737    audio_devices_t device = outputDesc->device();
4738    bool shouldMute = outputDesc->isActive() && (popcount(device) >= 2);
4739
4740    for (size_t i = 0; i < NUM_STRATEGIES; i++) {
4741        audio_devices_t curDevice = getDeviceForStrategy((routing_strategy)i, false /*fromCache*/);
4742        curDevice = curDevice & outputDesc->mProfile->mSupportedDevices.types();
4743        bool mute = shouldMute && (curDevice & device) && (curDevice != device);
4744        bool doMute = false;
4745
4746        if (mute && !outputDesc->mStrategyMutedByDevice[i]) {
4747            doMute = true;
4748            outputDesc->mStrategyMutedByDevice[i] = true;
4749        } else if (!mute && outputDesc->mStrategyMutedByDevice[i]){
4750            doMute = true;
4751            outputDesc->mStrategyMutedByDevice[i] = false;
4752        }
4753        if (doMute) {
4754            for (size_t j = 0; j < mOutputs.size(); j++) {
4755                sp<AudioOutputDescriptor> desc = mOutputs.valueAt(j);
4756                // skip output if it does not share any device with current output
4757                if ((desc->supportedDevices() & outputDesc->supportedDevices())
4758                        == AUDIO_DEVICE_NONE) {
4759                    continue;
4760                }
4761                audio_io_handle_t curOutput = mOutputs.keyAt(j);
4762                ALOGVV("checkDeviceMuteStrategies() %s strategy %d (curDevice %04x) on output %d",
4763                      mute ? "muting" : "unmuting", i, curDevice, curOutput);
4764                setStrategyMute((routing_strategy)i, mute, curOutput, mute ? 0 : delayMs);
4765                if (desc->isStrategyActive((routing_strategy)i)) {
4766                    if (mute) {
4767                        // FIXME: should not need to double latency if volume could be applied
4768                        // immediately by the audioflinger mixer. We must account for the delay
4769                        // between now and the next time the audioflinger thread for this output
4770                        // will process a buffer (which corresponds to one buffer size,
4771                        // usually 1/2 or 1/4 of the latency).
4772                        if (muteWaitMs < desc->latency() * 2) {
4773                            muteWaitMs = desc->latency() * 2;
4774                        }
4775                    }
4776                }
4777            }
4778        }
4779    }
4780
4781    // temporary mute output if device selection changes to avoid volume bursts due to
4782    // different per device volumes
4783    if (outputDesc->isActive() && (device != prevDevice)) {
4784        if (muteWaitMs < outputDesc->latency() * 2) {
4785            muteWaitMs = outputDesc->latency() * 2;
4786        }
4787        for (size_t i = 0; i < NUM_STRATEGIES; i++) {
4788            if (outputDesc->isStrategyActive((routing_strategy)i)) {
4789                setStrategyMute((routing_strategy)i, true, outputDesc->mIoHandle);
4790                // do tempMute unmute after twice the mute wait time
4791                setStrategyMute((routing_strategy)i, false, outputDesc->mIoHandle,
4792                                muteWaitMs *2, device);
4793            }
4794        }
4795    }
4796
4797    // wait for the PCM output buffers to empty before proceeding with the rest of the command
4798    if (muteWaitMs > delayMs) {
4799        muteWaitMs -= delayMs;
4800        usleep(muteWaitMs * 1000);
4801        return muteWaitMs;
4802    }
4803    return 0;
4804}
4805
4806uint32_t AudioPolicyManager::setOutputDevice(audio_io_handle_t output,
4807                                             audio_devices_t device,
4808                                             bool force,
4809                                             int delayMs,
4810                                             audio_patch_handle_t *patchHandle,
4811                                             const char* address)
4812{
4813    ALOGV("setOutputDevice() output %d device %04x delayMs %d", output, device, delayMs);
4814    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
4815    AudioParameter param;
4816    uint32_t muteWaitMs;
4817
4818    if (outputDesc->isDuplicated()) {
4819        muteWaitMs = setOutputDevice(outputDesc->mOutput1->mIoHandle, device, force, delayMs);
4820        muteWaitMs += setOutputDevice(outputDesc->mOutput2->mIoHandle, device, force, delayMs);
4821        return muteWaitMs;
4822    }
4823    // no need to proceed if new device is not AUDIO_DEVICE_NONE and not supported by current
4824    // output profile
4825    if ((device != AUDIO_DEVICE_NONE) &&
4826            ((device & outputDesc->mProfile->mSupportedDevices.types()) == 0)) {
4827        return 0;
4828    }
4829
4830    // filter devices according to output selected
4831    device = (audio_devices_t)(device & outputDesc->mProfile->mSupportedDevices.types());
4832
4833    audio_devices_t prevDevice = outputDesc->mDevice;
4834
4835    ALOGV("setOutputDevice() prevDevice %04x", prevDevice);
4836
4837    if (device != AUDIO_DEVICE_NONE) {
4838        outputDesc->mDevice = device;
4839    }
4840    muteWaitMs = checkDeviceMuteStrategies(outputDesc, prevDevice, delayMs);
4841
4842    // Do not change the routing if:
4843    //      the requested device is AUDIO_DEVICE_NONE
4844    //      OR the requested device is the same as current device
4845    //  AND force is not specified
4846    //  AND the output is connected by a valid audio patch.
4847    // Doing this check here allows the caller to call setOutputDevice() without conditions
4848    if ((device == AUDIO_DEVICE_NONE || device == prevDevice) && !force &&
4849            outputDesc->mPatchHandle != 0) {
4850        ALOGV("setOutputDevice() setting same device %04x or null device for output %d",
4851              device, output);
4852        return muteWaitMs;
4853    }
4854
4855    ALOGV("setOutputDevice() changing device");
4856
4857    // do the routing
4858    if (device == AUDIO_DEVICE_NONE) {
4859        resetOutputDevice(output, delayMs, NULL);
4860    } else {
4861        DeviceVector deviceList = (address == NULL) ?
4862                mAvailableOutputDevices.getDevicesFromType(device)
4863                : mAvailableOutputDevices.getDevicesFromTypeAddr(device, String8(address));
4864        if (!deviceList.isEmpty()) {
4865            struct audio_patch patch;
4866            outputDesc->toAudioPortConfig(&patch.sources[0]);
4867            patch.num_sources = 1;
4868            patch.num_sinks = 0;
4869            for (size_t i = 0; i < deviceList.size() && i < AUDIO_PATCH_PORTS_MAX; i++) {
4870                deviceList.itemAt(i)->toAudioPortConfig(&patch.sinks[i]);
4871                patch.num_sinks++;
4872            }
4873            ssize_t index;
4874            if (patchHandle && *patchHandle != AUDIO_PATCH_HANDLE_NONE) {
4875                index = mAudioPatches.indexOfKey(*patchHandle);
4876            } else {
4877                index = mAudioPatches.indexOfKey(outputDesc->mPatchHandle);
4878            }
4879            sp< AudioPatch> patchDesc;
4880            audio_patch_handle_t afPatchHandle = AUDIO_PATCH_HANDLE_NONE;
4881            if (index >= 0) {
4882                patchDesc = mAudioPatches.valueAt(index);
4883                afPatchHandle = patchDesc->mAfPatchHandle;
4884            }
4885
4886            status_t status = mpClientInterface->createAudioPatch(&patch,
4887                                                                   &afPatchHandle,
4888                                                                   delayMs);
4889            ALOGV("setOutputDevice() createAudioPatch returned %d patchHandle %d"
4890                    "num_sources %d num_sinks %d",
4891                                       status, afPatchHandle, patch.num_sources, patch.num_sinks);
4892            if (status == NO_ERROR) {
4893                if (index < 0) {
4894                    patchDesc = new AudioPatch((audio_patch_handle_t)nextUniqueId(),
4895                                               &patch, mUidCached);
4896                    addAudioPatch(patchDesc->mHandle, patchDesc);
4897                } else {
4898                    patchDesc->mPatch = patch;
4899                }
4900                patchDesc->mAfPatchHandle = afPatchHandle;
4901                patchDesc->mUid = mUidCached;
4902                if (patchHandle) {
4903                    *patchHandle = patchDesc->mHandle;
4904                }
4905                outputDesc->mPatchHandle = patchDesc->mHandle;
4906                nextAudioPortGeneration();
4907                mpClientInterface->onAudioPatchListUpdate();
4908            }
4909        }
4910
4911        // inform all input as well
4912        for (size_t i = 0; i < mInputs.size(); i++) {
4913            const sp<AudioInputDescriptor>  inputDescriptor = mInputs.valueAt(i);
4914            if (!isVirtualInputDevice(inputDescriptor->mDevice)) {
4915                AudioParameter inputCmd = AudioParameter();
4916                ALOGV("%s: inform input %d of device:%d", __func__,
4917                      inputDescriptor->mIoHandle, device);
4918                inputCmd.addInt(String8(AudioParameter::keyRouting),device);
4919                mpClientInterface->setParameters(inputDescriptor->mIoHandle,
4920                                                 inputCmd.toString(),
4921                                                 delayMs);
4922            }
4923        }
4924    }
4925
4926    // update stream volumes according to new device
4927    applyStreamVolumes(output, device, delayMs);
4928
4929    return muteWaitMs;
4930}
4931
4932status_t AudioPolicyManager::resetOutputDevice(audio_io_handle_t output,
4933                                               int delayMs,
4934                                               audio_patch_handle_t *patchHandle)
4935{
4936    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
4937    ssize_t index;
4938    if (patchHandle) {
4939        index = mAudioPatches.indexOfKey(*patchHandle);
4940    } else {
4941        index = mAudioPatches.indexOfKey(outputDesc->mPatchHandle);
4942    }
4943    if (index < 0) {
4944        return INVALID_OPERATION;
4945    }
4946    sp< AudioPatch> patchDesc = mAudioPatches.valueAt(index);
4947    status_t status = mpClientInterface->releaseAudioPatch(patchDesc->mAfPatchHandle, delayMs);
4948    ALOGV("resetOutputDevice() releaseAudioPatch returned %d", status);
4949    outputDesc->mPatchHandle = 0;
4950    removeAudioPatch(patchDesc->mHandle);
4951    nextAudioPortGeneration();
4952    mpClientInterface->onAudioPatchListUpdate();
4953    return status;
4954}
4955
4956status_t AudioPolicyManager::setInputDevice(audio_io_handle_t input,
4957                                            audio_devices_t device,
4958                                            bool force,
4959                                            audio_patch_handle_t *patchHandle)
4960{
4961    status_t status = NO_ERROR;
4962
4963    sp<AudioInputDescriptor> inputDesc = mInputs.valueFor(input);
4964    if ((device != AUDIO_DEVICE_NONE) && ((device != inputDesc->mDevice) || force)) {
4965        inputDesc->mDevice = device;
4966
4967        DeviceVector deviceList = mAvailableInputDevices.getDevicesFromType(device);
4968        if (!deviceList.isEmpty()) {
4969            struct audio_patch patch;
4970            inputDesc->toAudioPortConfig(&patch.sinks[0]);
4971            // AUDIO_SOURCE_HOTWORD is for internal use only:
4972            // handled as AUDIO_SOURCE_VOICE_RECOGNITION by the audio HAL
4973            if (patch.sinks[0].ext.mix.usecase.source == AUDIO_SOURCE_HOTWORD &&
4974                    !inputDesc->mIsSoundTrigger) {
4975                patch.sinks[0].ext.mix.usecase.source = AUDIO_SOURCE_VOICE_RECOGNITION;
4976            }
4977            patch.num_sinks = 1;
4978            //only one input device for now
4979            deviceList.itemAt(0)->toAudioPortConfig(&patch.sources[0]);
4980            patch.num_sources = 1;
4981            ssize_t index;
4982            if (patchHandle && *patchHandle != AUDIO_PATCH_HANDLE_NONE) {
4983                index = mAudioPatches.indexOfKey(*patchHandle);
4984            } else {
4985                index = mAudioPatches.indexOfKey(inputDesc->mPatchHandle);
4986            }
4987            sp< AudioPatch> patchDesc;
4988            audio_patch_handle_t afPatchHandle = AUDIO_PATCH_HANDLE_NONE;
4989            if (index >= 0) {
4990                patchDesc = mAudioPatches.valueAt(index);
4991                afPatchHandle = patchDesc->mAfPatchHandle;
4992            }
4993
4994            status_t status = mpClientInterface->createAudioPatch(&patch,
4995                                                                  &afPatchHandle,
4996                                                                  0);
4997            ALOGV("setInputDevice() createAudioPatch returned %d patchHandle %d",
4998                                                                          status, afPatchHandle);
4999            if (status == NO_ERROR) {
5000                if (index < 0) {
5001                    patchDesc = new AudioPatch((audio_patch_handle_t)nextUniqueId(),
5002                                               &patch, mUidCached);
5003                    addAudioPatch(patchDesc->mHandle, patchDesc);
5004                } else {
5005                    patchDesc->mPatch = patch;
5006                }
5007                patchDesc->mAfPatchHandle = afPatchHandle;
5008                patchDesc->mUid = mUidCached;
5009                if (patchHandle) {
5010                    *patchHandle = patchDesc->mHandle;
5011                }
5012                inputDesc->mPatchHandle = patchDesc->mHandle;
5013                nextAudioPortGeneration();
5014                mpClientInterface->onAudioPatchListUpdate();
5015            }
5016        }
5017    }
5018    return status;
5019}
5020
5021status_t AudioPolicyManager::resetInputDevice(audio_io_handle_t input,
5022                                              audio_patch_handle_t *patchHandle)
5023{
5024    sp<AudioInputDescriptor> inputDesc = mInputs.valueFor(input);
5025    ssize_t index;
5026    if (patchHandle) {
5027        index = mAudioPatches.indexOfKey(*patchHandle);
5028    } else {
5029        index = mAudioPatches.indexOfKey(inputDesc->mPatchHandle);
5030    }
5031    if (index < 0) {
5032        return INVALID_OPERATION;
5033    }
5034    sp< AudioPatch> patchDesc = mAudioPatches.valueAt(index);
5035    status_t status = mpClientInterface->releaseAudioPatch(patchDesc->mAfPatchHandle, 0);
5036    ALOGV("resetInputDevice() releaseAudioPatch returned %d", status);
5037    inputDesc->mPatchHandle = 0;
5038    removeAudioPatch(patchDesc->mHandle);
5039    nextAudioPortGeneration();
5040    mpClientInterface->onAudioPatchListUpdate();
5041    return status;
5042}
5043
5044sp<AudioPolicyManager::IOProfile> AudioPolicyManager::getInputProfile(audio_devices_t device,
5045                                                   String8 address,
5046                                                   uint32_t& samplingRate,
5047                                                   audio_format_t format,
5048                                                   audio_channel_mask_t channelMask,
5049                                                   audio_input_flags_t flags)
5050{
5051    // Choose an input profile based on the requested capture parameters: select the first available
5052    // profile supporting all requested parameters.
5053
5054    for (size_t i = 0; i < mHwModules.size(); i++)
5055    {
5056        if (mHwModules[i]->mHandle == 0) {
5057            continue;
5058        }
5059        for (size_t j = 0; j < mHwModules[i]->mInputProfiles.size(); j++)
5060        {
5061            sp<IOProfile> profile = mHwModules[i]->mInputProfiles[j];
5062            // profile->log();
5063            if (profile->isCompatibleProfile(device, address, samplingRate,
5064                                             &samplingRate /*updatedSamplingRate*/,
5065                                             format, channelMask, (audio_output_flags_t) flags)) {
5066
5067                return profile;
5068            }
5069        }
5070    }
5071    return NULL;
5072}
5073
5074audio_devices_t AudioPolicyManager::getDeviceForInputSource(audio_source_t inputSource,
5075                                                            AudioMix **policyMix)
5076{
5077    uint32_t device = AUDIO_DEVICE_NONE;
5078    audio_devices_t availableDeviceTypes = mAvailableInputDevices.types() &
5079                                            ~AUDIO_DEVICE_BIT_IN;
5080
5081    for (size_t i = 0; i < mPolicyMixes.size(); i++) {
5082        if (mPolicyMixes[i]->mMix.mMixType != MIX_TYPE_RECORDERS) {
5083            continue;
5084        }
5085        for (size_t j = 0; j < mPolicyMixes[i]->mMix.mCriteria.size(); j++) {
5086            if ((RULE_MATCH_ATTRIBUTE_CAPTURE_PRESET == mPolicyMixes[i]->mMix.mCriteria[j].mRule &&
5087                    mPolicyMixes[i]->mMix.mCriteria[j].mAttr.mSource == inputSource) ||
5088               (RULE_EXCLUDE_ATTRIBUTE_CAPTURE_PRESET == mPolicyMixes[i]->mMix.mCriteria[j].mRule &&
5089                    mPolicyMixes[i]->mMix.mCriteria[j].mAttr.mSource != inputSource)) {
5090                if (availableDeviceTypes & AUDIO_DEVICE_IN_REMOTE_SUBMIX) {
5091                    if (policyMix != NULL) {
5092                        *policyMix = &mPolicyMixes[i]->mMix;
5093                    }
5094                    return AUDIO_DEVICE_IN_REMOTE_SUBMIX;
5095                }
5096                break;
5097            }
5098        }
5099    }
5100
5101    switch (inputSource) {
5102    case AUDIO_SOURCE_VOICE_UPLINK:
5103      if (availableDeviceTypes & AUDIO_DEVICE_IN_VOICE_CALL) {
5104          device = AUDIO_DEVICE_IN_VOICE_CALL;
5105          break;
5106      }
5107      break;
5108
5109    case AUDIO_SOURCE_DEFAULT:
5110    case AUDIO_SOURCE_MIC:
5111    if (availableDeviceTypes & AUDIO_DEVICE_IN_BLUETOOTH_A2DP) {
5112        device = AUDIO_DEVICE_IN_BLUETOOTH_A2DP;
5113    } else if (availableDeviceTypes & AUDIO_DEVICE_IN_WIRED_HEADSET) {
5114        device = AUDIO_DEVICE_IN_WIRED_HEADSET;
5115    } else if (availableDeviceTypes & AUDIO_DEVICE_IN_USB_DEVICE) {
5116        device = AUDIO_DEVICE_IN_USB_DEVICE;
5117    } else if (availableDeviceTypes & AUDIO_DEVICE_IN_BUILTIN_MIC) {
5118        device = AUDIO_DEVICE_IN_BUILTIN_MIC;
5119    }
5120    break;
5121
5122    case AUDIO_SOURCE_VOICE_COMMUNICATION:
5123        // Allow only use of devices on primary input if in call and HAL does not support routing
5124        // to voice call path.
5125        if ((mPhoneState == AUDIO_MODE_IN_CALL) &&
5126                (mAvailableOutputDevices.types() & AUDIO_DEVICE_OUT_TELEPHONY_TX) == 0) {
5127            availableDeviceTypes = availablePrimaryInputDevices() & ~AUDIO_DEVICE_BIT_IN;
5128        }
5129
5130        switch (mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION]) {
5131        case AUDIO_POLICY_FORCE_BT_SCO:
5132            // if SCO device is requested but no SCO device is available, fall back to default case
5133            if (availableDeviceTypes & AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET) {
5134                device = AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET;
5135                break;
5136            }
5137            // FALL THROUGH
5138
5139        default:    // FORCE_NONE
5140            if (availableDeviceTypes & AUDIO_DEVICE_IN_WIRED_HEADSET) {
5141                device = AUDIO_DEVICE_IN_WIRED_HEADSET;
5142            } else if (availableDeviceTypes & AUDIO_DEVICE_IN_USB_DEVICE) {
5143                device = AUDIO_DEVICE_IN_USB_DEVICE;
5144            } else if (availableDeviceTypes & AUDIO_DEVICE_IN_BUILTIN_MIC) {
5145                device = AUDIO_DEVICE_IN_BUILTIN_MIC;
5146            }
5147            break;
5148
5149        case AUDIO_POLICY_FORCE_SPEAKER:
5150            if (availableDeviceTypes & AUDIO_DEVICE_IN_BACK_MIC) {
5151                device = AUDIO_DEVICE_IN_BACK_MIC;
5152            } else if (availableDeviceTypes & AUDIO_DEVICE_IN_BUILTIN_MIC) {
5153                device = AUDIO_DEVICE_IN_BUILTIN_MIC;
5154            }
5155            break;
5156        }
5157        break;
5158
5159    case AUDIO_SOURCE_VOICE_RECOGNITION:
5160    case AUDIO_SOURCE_HOTWORD:
5161        if (mForceUse[AUDIO_POLICY_FORCE_FOR_RECORD] == AUDIO_POLICY_FORCE_BT_SCO &&
5162                availableDeviceTypes & AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET) {
5163            device = AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET;
5164        } else if (availableDeviceTypes & AUDIO_DEVICE_IN_WIRED_HEADSET) {
5165            device = AUDIO_DEVICE_IN_WIRED_HEADSET;
5166        } else if (availableDeviceTypes & AUDIO_DEVICE_IN_USB_DEVICE) {
5167            device = AUDIO_DEVICE_IN_USB_DEVICE;
5168        } else if (availableDeviceTypes & AUDIO_DEVICE_IN_BUILTIN_MIC) {
5169            device = AUDIO_DEVICE_IN_BUILTIN_MIC;
5170        }
5171        break;
5172    case AUDIO_SOURCE_CAMCORDER:
5173        if (availableDeviceTypes & AUDIO_DEVICE_IN_BACK_MIC) {
5174            device = AUDIO_DEVICE_IN_BACK_MIC;
5175        } else if (availableDeviceTypes & AUDIO_DEVICE_IN_BUILTIN_MIC) {
5176            device = AUDIO_DEVICE_IN_BUILTIN_MIC;
5177        }
5178        break;
5179    case AUDIO_SOURCE_VOICE_DOWNLINK:
5180    case AUDIO_SOURCE_VOICE_CALL:
5181        if (availableDeviceTypes & AUDIO_DEVICE_IN_VOICE_CALL) {
5182            device = AUDIO_DEVICE_IN_VOICE_CALL;
5183        }
5184        break;
5185    case AUDIO_SOURCE_REMOTE_SUBMIX:
5186        if (availableDeviceTypes & AUDIO_DEVICE_IN_REMOTE_SUBMIX) {
5187            device = AUDIO_DEVICE_IN_REMOTE_SUBMIX;
5188        }
5189        break;
5190     case AUDIO_SOURCE_FM_TUNER:
5191        if (availableDeviceTypes & AUDIO_DEVICE_IN_FM_TUNER) {
5192            device = AUDIO_DEVICE_IN_FM_TUNER;
5193        }
5194        break;
5195    default:
5196        ALOGW("getDeviceForInputSource() invalid input source %d", inputSource);
5197        break;
5198    }
5199    ALOGV("getDeviceForInputSource()input source %d, device %08x", inputSource, device);
5200    return device;
5201}
5202
5203bool AudioPolicyManager::isVirtualInputDevice(audio_devices_t device)
5204{
5205    if ((device & AUDIO_DEVICE_BIT_IN) != 0) {
5206        device &= ~AUDIO_DEVICE_BIT_IN;
5207        if ((popcount(device) == 1) && ((device & ~APM_AUDIO_IN_DEVICE_VIRTUAL_ALL) == 0))
5208            return true;
5209    }
5210    return false;
5211}
5212
5213bool AudioPolicyManager::deviceDistinguishesOnAddress(audio_devices_t device) {
5214    return ((device & APM_AUDIO_DEVICE_MATCH_ADDRESS_ALL & ~AUDIO_DEVICE_BIT_IN) != 0);
5215}
5216
5217audio_io_handle_t AudioPolicyManager::getActiveInput(bool ignoreVirtualInputs)
5218{
5219    for (size_t i = 0; i < mInputs.size(); i++) {
5220        const sp<AudioInputDescriptor>  input_descriptor = mInputs.valueAt(i);
5221        if ((input_descriptor->mRefCount > 0)
5222                && (!ignoreVirtualInputs || !isVirtualInputDevice(input_descriptor->mDevice))) {
5223            return mInputs.keyAt(i);
5224        }
5225    }
5226    return 0;
5227}
5228
5229uint32_t AudioPolicyManager::activeInputsCount() const
5230{
5231    uint32_t count = 0;
5232    for (size_t i = 0; i < mInputs.size(); i++) {
5233        const sp<AudioInputDescriptor>  desc = mInputs.valueAt(i);
5234        if (desc->mRefCount > 0) {
5235            return count++;
5236        }
5237    }
5238    return count;
5239}
5240
5241
5242audio_devices_t AudioPolicyManager::getDeviceForVolume(audio_devices_t device)
5243{
5244    if (device == AUDIO_DEVICE_NONE) {
5245        // this happens when forcing a route update and no track is active on an output.
5246        // In this case the returned category is not important.
5247        device =  AUDIO_DEVICE_OUT_SPEAKER;
5248    } else if (popcount(device) > 1) {
5249        // Multiple device selection is either:
5250        //  - speaker + one other device: give priority to speaker in this case.
5251        //  - one A2DP device + another device: happens with duplicated output. In this case
5252        // retain the device on the A2DP output as the other must not correspond to an active
5253        // selection if not the speaker.
5254        //  - HDMI-CEC system audio mode only output: give priority to available item in order.
5255        if (device & AUDIO_DEVICE_OUT_SPEAKER) {
5256            device = AUDIO_DEVICE_OUT_SPEAKER;
5257        } else if (device & AUDIO_DEVICE_OUT_HDMI_ARC) {
5258            device = AUDIO_DEVICE_OUT_HDMI_ARC;
5259        } else if (device & AUDIO_DEVICE_OUT_AUX_LINE) {
5260            device = AUDIO_DEVICE_OUT_AUX_LINE;
5261        } else if (device & AUDIO_DEVICE_OUT_SPDIF) {
5262            device = AUDIO_DEVICE_OUT_SPDIF;
5263        } else {
5264            device = (audio_devices_t)(device & AUDIO_DEVICE_OUT_ALL_A2DP);
5265        }
5266    }
5267
5268    /*SPEAKER_SAFE is an alias of SPEAKER for purposes of volume control*/
5269    if (device == AUDIO_DEVICE_OUT_SPEAKER_SAFE)
5270        device = AUDIO_DEVICE_OUT_SPEAKER;
5271
5272    ALOGW_IF(popcount(device) != 1,
5273            "getDeviceForVolume() invalid device combination: %08x",
5274            device);
5275
5276    return device;
5277}
5278
5279AudioPolicyManager::device_category AudioPolicyManager::getDeviceCategory(audio_devices_t device)
5280{
5281    switch(getDeviceForVolume(device)) {
5282        case AUDIO_DEVICE_OUT_EARPIECE:
5283            return DEVICE_CATEGORY_EARPIECE;
5284        case AUDIO_DEVICE_OUT_WIRED_HEADSET:
5285        case AUDIO_DEVICE_OUT_WIRED_HEADPHONE:
5286        case AUDIO_DEVICE_OUT_BLUETOOTH_SCO:
5287        case AUDIO_DEVICE_OUT_BLUETOOTH_SCO_HEADSET:
5288        case AUDIO_DEVICE_OUT_BLUETOOTH_A2DP:
5289        case AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES:
5290            return DEVICE_CATEGORY_HEADSET;
5291        case AUDIO_DEVICE_OUT_LINE:
5292        case AUDIO_DEVICE_OUT_AUX_DIGITAL:
5293        /*USB?  Remote submix?*/
5294            return DEVICE_CATEGORY_EXT_MEDIA;
5295        case AUDIO_DEVICE_OUT_SPEAKER:
5296        case AUDIO_DEVICE_OUT_BLUETOOTH_SCO_CARKIT:
5297        case AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_SPEAKER:
5298        case AUDIO_DEVICE_OUT_USB_ACCESSORY:
5299        case AUDIO_DEVICE_OUT_USB_DEVICE:
5300        case AUDIO_DEVICE_OUT_REMOTE_SUBMIX:
5301        default:
5302            return DEVICE_CATEGORY_SPEAKER;
5303    }
5304}
5305
5306/* static */
5307float AudioPolicyManager::volIndexToAmpl(audio_devices_t device, const StreamDescriptor& streamDesc,
5308        int indexInUi)
5309{
5310    device_category deviceCategory = getDeviceCategory(device);
5311    const VolumeCurvePoint *curve = streamDesc.mVolumeCurve[deviceCategory];
5312
5313    // the volume index in the UI is relative to the min and max volume indices for this stream type
5314    int nbSteps = 1 + curve[VOLMAX].mIndex -
5315            curve[VOLMIN].mIndex;
5316    int volIdx = (nbSteps * (indexInUi - streamDesc.mIndexMin)) /
5317            (streamDesc.mIndexMax - streamDesc.mIndexMin);
5318
5319    // find what part of the curve this index volume belongs to, or if it's out of bounds
5320    int segment = 0;
5321    if (volIdx < curve[VOLMIN].mIndex) {         // out of bounds
5322        return 0.0f;
5323    } else if (volIdx < curve[VOLKNEE1].mIndex) {
5324        segment = 0;
5325    } else if (volIdx < curve[VOLKNEE2].mIndex) {
5326        segment = 1;
5327    } else if (volIdx <= curve[VOLMAX].mIndex) {
5328        segment = 2;
5329    } else {                                                               // out of bounds
5330        return 1.0f;
5331    }
5332
5333    // linear interpolation in the attenuation table in dB
5334    float decibels = curve[segment].mDBAttenuation +
5335            ((float)(volIdx - curve[segment].mIndex)) *
5336                ( (curve[segment+1].mDBAttenuation -
5337                        curve[segment].mDBAttenuation) /
5338                    ((float)(curve[segment+1].mIndex -
5339                            curve[segment].mIndex)) );
5340
5341    float amplification = exp( decibels * 0.115129f); // exp( dB * ln(10) / 20 )
5342
5343    ALOGVV("VOLUME vol index=[%d %d %d], dB=[%.1f %.1f %.1f] ampl=%.5f",
5344            curve[segment].mIndex, volIdx,
5345            curve[segment+1].mIndex,
5346            curve[segment].mDBAttenuation,
5347            decibels,
5348            curve[segment+1].mDBAttenuation,
5349            amplification);
5350
5351    return amplification;
5352}
5353
5354const AudioPolicyManager::VolumeCurvePoint
5355    AudioPolicyManager::sDefaultVolumeCurve[AudioPolicyManager::VOLCNT] = {
5356    {1, -49.5f}, {33, -33.5f}, {66, -17.0f}, {100, 0.0f}
5357};
5358
5359const AudioPolicyManager::VolumeCurvePoint
5360    AudioPolicyManager::sDefaultMediaVolumeCurve[AudioPolicyManager::VOLCNT] = {
5361    {1, -58.0f}, {20, -40.0f}, {60, -17.0f}, {100, 0.0f}
5362};
5363
5364const AudioPolicyManager::VolumeCurvePoint
5365    AudioPolicyManager::sExtMediaSystemVolumeCurve[AudioPolicyManager::VOLCNT] = {
5366    {1, -58.0f}, {20, -40.0f}, {60, -21.0f}, {100, -10.0f}
5367};
5368
5369const AudioPolicyManager::VolumeCurvePoint
5370    AudioPolicyManager::sSpeakerMediaVolumeCurve[AudioPolicyManager::VOLCNT] = {
5371    {1, -56.0f}, {20, -34.0f}, {60, -11.0f}, {100, 0.0f}
5372};
5373
5374const AudioPolicyManager::VolumeCurvePoint
5375    AudioPolicyManager::sSpeakerMediaVolumeCurveDrc[AudioPolicyManager::VOLCNT] = {
5376    {1, -55.0f}, {20, -43.0f}, {86, -12.0f}, {100, 0.0f}
5377};
5378
5379const AudioPolicyManager::VolumeCurvePoint
5380    AudioPolicyManager::sSpeakerSonificationVolumeCurve[AudioPolicyManager::VOLCNT] = {
5381    {1, -29.7f}, {33, -20.1f}, {66, -10.2f}, {100, 0.0f}
5382};
5383
5384const AudioPolicyManager::VolumeCurvePoint
5385    AudioPolicyManager::sSpeakerSonificationVolumeCurveDrc[AudioPolicyManager::VOLCNT] = {
5386    {1, -35.7f}, {33, -26.1f}, {66, -13.2f}, {100, 0.0f}
5387};
5388
5389// AUDIO_STREAM_SYSTEM, AUDIO_STREAM_ENFORCED_AUDIBLE and AUDIO_STREAM_DTMF volume tracks
5390// AUDIO_STREAM_RING on phones and AUDIO_STREAM_MUSIC on tablets.
5391// AUDIO_STREAM_DTMF tracks AUDIO_STREAM_VOICE_CALL while in call (See AudioService.java).
5392// The range is constrained between -24dB and -6dB over speaker and -30dB and -18dB over headset.
5393
5394const AudioPolicyManager::VolumeCurvePoint
5395    AudioPolicyManager::sDefaultSystemVolumeCurve[AudioPolicyManager::VOLCNT] = {
5396    {1, -24.0f}, {33, -18.0f}, {66, -12.0f}, {100, -6.0f}
5397};
5398
5399const AudioPolicyManager::VolumeCurvePoint
5400    AudioPolicyManager::sDefaultSystemVolumeCurveDrc[AudioPolicyManager::VOLCNT] = {
5401    {1, -34.0f}, {33, -24.0f}, {66, -15.0f}, {100, -6.0f}
5402};
5403
5404const AudioPolicyManager::VolumeCurvePoint
5405    AudioPolicyManager::sHeadsetSystemVolumeCurve[AudioPolicyManager::VOLCNT] = {
5406    {1, -30.0f}, {33, -26.0f}, {66, -22.0f}, {100, -18.0f}
5407};
5408
5409const AudioPolicyManager::VolumeCurvePoint
5410    AudioPolicyManager::sDefaultVoiceVolumeCurve[AudioPolicyManager::VOLCNT] = {
5411    {0, -42.0f}, {33, -28.0f}, {66, -14.0f}, {100, 0.0f}
5412};
5413
5414const AudioPolicyManager::VolumeCurvePoint
5415    AudioPolicyManager::sSpeakerVoiceVolumeCurve[AudioPolicyManager::VOLCNT] = {
5416    {0, -24.0f}, {33, -16.0f}, {66, -8.0f}, {100, 0.0f}
5417};
5418
5419const AudioPolicyManager::VolumeCurvePoint
5420    AudioPolicyManager::sLinearVolumeCurve[AudioPolicyManager::VOLCNT] = {
5421    {0, -96.0f}, {33, -68.0f}, {66, -34.0f}, {100, 0.0f}
5422};
5423
5424const AudioPolicyManager::VolumeCurvePoint
5425    AudioPolicyManager::sSilentVolumeCurve[AudioPolicyManager::VOLCNT] = {
5426    {0, -96.0f}, {1, -96.0f}, {2, -96.0f}, {100, -96.0f}
5427};
5428
5429const AudioPolicyManager::VolumeCurvePoint
5430    AudioPolicyManager::sFullScaleVolumeCurve[AudioPolicyManager::VOLCNT] = {
5431    {0, 0.0f}, {1, 0.0f}, {2, 0.0f}, {100, 0.0f}
5432};
5433
5434const AudioPolicyManager::VolumeCurvePoint
5435            *AudioPolicyManager::sVolumeProfiles[AUDIO_STREAM_CNT]
5436                                                   [AudioPolicyManager::DEVICE_CATEGORY_CNT] = {
5437    { // AUDIO_STREAM_VOICE_CALL
5438        sDefaultVoiceVolumeCurve, // DEVICE_CATEGORY_HEADSET
5439        sSpeakerVoiceVolumeCurve, // DEVICE_CATEGORY_SPEAKER
5440        sDefaultVoiceVolumeCurve, // DEVICE_CATEGORY_EARPIECE
5441        sDefaultMediaVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
5442    },
5443    { // AUDIO_STREAM_SYSTEM
5444        sHeadsetSystemVolumeCurve, // DEVICE_CATEGORY_HEADSET
5445        sDefaultSystemVolumeCurve, // DEVICE_CATEGORY_SPEAKER
5446        sDefaultSystemVolumeCurve,  // DEVICE_CATEGORY_EARPIECE
5447        sExtMediaSystemVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
5448    },
5449    { // AUDIO_STREAM_RING
5450        sDefaultVolumeCurve, // DEVICE_CATEGORY_HEADSET
5451        sSpeakerSonificationVolumeCurve, // DEVICE_CATEGORY_SPEAKER
5452        sDefaultVolumeCurve,  // DEVICE_CATEGORY_EARPIECE
5453        sExtMediaSystemVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
5454    },
5455    { // AUDIO_STREAM_MUSIC
5456        sDefaultMediaVolumeCurve, // DEVICE_CATEGORY_HEADSET
5457        sSpeakerMediaVolumeCurve, // DEVICE_CATEGORY_SPEAKER
5458        sDefaultMediaVolumeCurve, // DEVICE_CATEGORY_EARPIECE
5459        sDefaultMediaVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
5460    },
5461    { // AUDIO_STREAM_ALARM
5462        sDefaultVolumeCurve, // DEVICE_CATEGORY_HEADSET
5463        sSpeakerSonificationVolumeCurve, // DEVICE_CATEGORY_SPEAKER
5464        sDefaultVolumeCurve,  // DEVICE_CATEGORY_EARPIECE
5465        sExtMediaSystemVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
5466    },
5467    { // AUDIO_STREAM_NOTIFICATION
5468        sDefaultVolumeCurve, // DEVICE_CATEGORY_HEADSET
5469        sSpeakerSonificationVolumeCurve, // DEVICE_CATEGORY_SPEAKER
5470        sDefaultVolumeCurve,  // DEVICE_CATEGORY_EARPIECE
5471        sExtMediaSystemVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
5472    },
5473    { // AUDIO_STREAM_BLUETOOTH_SCO
5474        sDefaultVoiceVolumeCurve, // DEVICE_CATEGORY_HEADSET
5475        sSpeakerVoiceVolumeCurve, // DEVICE_CATEGORY_SPEAKER
5476        sDefaultVoiceVolumeCurve, // DEVICE_CATEGORY_EARPIECE
5477        sDefaultMediaVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
5478    },
5479    { // AUDIO_STREAM_ENFORCED_AUDIBLE
5480        sHeadsetSystemVolumeCurve, // DEVICE_CATEGORY_HEADSET
5481        sDefaultSystemVolumeCurve, // DEVICE_CATEGORY_SPEAKER
5482        sDefaultSystemVolumeCurve, // DEVICE_CATEGORY_EARPIECE
5483        sExtMediaSystemVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
5484    },
5485    {  // AUDIO_STREAM_DTMF
5486        sHeadsetSystemVolumeCurve, // DEVICE_CATEGORY_HEADSET
5487        sDefaultSystemVolumeCurve, // DEVICE_CATEGORY_SPEAKER
5488        sDefaultSystemVolumeCurve, // DEVICE_CATEGORY_EARPIECE
5489        sExtMediaSystemVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
5490    },
5491    { // AUDIO_STREAM_TTS
5492      // "Transmitted Through Speaker": always silent except on DEVICE_CATEGORY_SPEAKER
5493        sSilentVolumeCurve, // DEVICE_CATEGORY_HEADSET
5494        sLinearVolumeCurve, // DEVICE_CATEGORY_SPEAKER
5495        sSilentVolumeCurve, // DEVICE_CATEGORY_EARPIECE
5496        sSilentVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
5497    },
5498    { // AUDIO_STREAM_ACCESSIBILITY
5499        sDefaultMediaVolumeCurve, // DEVICE_CATEGORY_HEADSET
5500        sSpeakerMediaVolumeCurve, // DEVICE_CATEGORY_SPEAKER
5501        sDefaultMediaVolumeCurve, // DEVICE_CATEGORY_EARPIECE
5502        sDefaultMediaVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
5503    },
5504    { // AUDIO_STREAM_REROUTING
5505        sFullScaleVolumeCurve, // DEVICE_CATEGORY_HEADSET
5506        sFullScaleVolumeCurve, // DEVICE_CATEGORY_SPEAKER
5507        sFullScaleVolumeCurve, // DEVICE_CATEGORY_EARPIECE
5508        sFullScaleVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
5509    },
5510    { // AUDIO_STREAM_PATCH
5511        sFullScaleVolumeCurve, // DEVICE_CATEGORY_HEADSET
5512        sFullScaleVolumeCurve, // DEVICE_CATEGORY_SPEAKER
5513        sFullScaleVolumeCurve, // DEVICE_CATEGORY_EARPIECE
5514        sFullScaleVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
5515    },
5516};
5517
5518void AudioPolicyManager::initializeVolumeCurves()
5519{
5520    for (int i = 0; i < AUDIO_STREAM_CNT; i++) {
5521        for (int j = 0; j < DEVICE_CATEGORY_CNT; j++) {
5522            mStreams[i].mVolumeCurve[j] =
5523                    sVolumeProfiles[i][j];
5524        }
5525    }
5526
5527    // Check availability of DRC on speaker path: if available, override some of the speaker curves
5528    if (mSpeakerDrcEnabled) {
5529        mStreams[AUDIO_STREAM_SYSTEM].mVolumeCurve[DEVICE_CATEGORY_SPEAKER] =
5530                sDefaultSystemVolumeCurveDrc;
5531        mStreams[AUDIO_STREAM_RING].mVolumeCurve[DEVICE_CATEGORY_SPEAKER] =
5532                sSpeakerSonificationVolumeCurveDrc;
5533        mStreams[AUDIO_STREAM_ALARM].mVolumeCurve[DEVICE_CATEGORY_SPEAKER] =
5534                sSpeakerSonificationVolumeCurveDrc;
5535        mStreams[AUDIO_STREAM_NOTIFICATION].mVolumeCurve[DEVICE_CATEGORY_SPEAKER] =
5536                sSpeakerSonificationVolumeCurveDrc;
5537        mStreams[AUDIO_STREAM_MUSIC].mVolumeCurve[DEVICE_CATEGORY_SPEAKER] =
5538                sSpeakerMediaVolumeCurveDrc;
5539        mStreams[AUDIO_STREAM_ACCESSIBILITY].mVolumeCurve[DEVICE_CATEGORY_SPEAKER] =
5540                sSpeakerMediaVolumeCurveDrc;
5541    }
5542}
5543
5544float AudioPolicyManager::computeVolume(audio_stream_type_t stream,
5545                                            int index,
5546                                            audio_io_handle_t output,
5547                                            audio_devices_t device)
5548{
5549    float volume = 1.0;
5550    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
5551    StreamDescriptor &streamDesc = mStreams[stream];
5552
5553    if (device == AUDIO_DEVICE_NONE) {
5554        device = outputDesc->device();
5555    }
5556
5557    volume = volIndexToAmpl(device, streamDesc, index);
5558
5559    // if a headset is connected, apply the following rules to ring tones and notifications
5560    // to avoid sound level bursts in user's ears:
5561    // - always attenuate ring tones and notifications volume by 6dB
5562    // - if music is playing, always limit the volume to current music volume,
5563    // with a minimum threshold at -36dB so that notification is always perceived.
5564    const routing_strategy stream_strategy = getStrategy(stream);
5565    if ((device & (AUDIO_DEVICE_OUT_BLUETOOTH_A2DP |
5566            AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES |
5567            AUDIO_DEVICE_OUT_WIRED_HEADSET |
5568            AUDIO_DEVICE_OUT_WIRED_HEADPHONE)) &&
5569        ((stream_strategy == STRATEGY_SONIFICATION)
5570                || (stream_strategy == STRATEGY_SONIFICATION_RESPECTFUL)
5571                || (stream == AUDIO_STREAM_SYSTEM)
5572                || ((stream_strategy == STRATEGY_ENFORCED_AUDIBLE) &&
5573                    (mForceUse[AUDIO_POLICY_FORCE_FOR_SYSTEM] == AUDIO_POLICY_FORCE_NONE))) &&
5574        streamDesc.mCanBeMuted) {
5575        volume *= SONIFICATION_HEADSET_VOLUME_FACTOR;
5576        // when the phone is ringing we must consider that music could have been paused just before
5577        // by the music application and behave as if music was active if the last music track was
5578        // just stopped
5579        if (isStreamActive(AUDIO_STREAM_MUSIC, SONIFICATION_HEADSET_MUSIC_DELAY) ||
5580                mLimitRingtoneVolume) {
5581            audio_devices_t musicDevice = getDeviceForStrategy(STRATEGY_MEDIA, true /*fromCache*/);
5582            float musicVol = computeVolume(AUDIO_STREAM_MUSIC,
5583                               mStreams[AUDIO_STREAM_MUSIC].getVolumeIndex(musicDevice),
5584                               output,
5585                               musicDevice);
5586            float minVol = (musicVol > SONIFICATION_HEADSET_VOLUME_MIN) ?
5587                                musicVol : SONIFICATION_HEADSET_VOLUME_MIN;
5588            if (volume > minVol) {
5589                volume = minVol;
5590                ALOGV("computeVolume limiting volume to %f musicVol %f", minVol, musicVol);
5591            }
5592        }
5593    }
5594
5595    return volume;
5596}
5597
5598status_t AudioPolicyManager::checkAndSetVolume(audio_stream_type_t stream,
5599                                                   int index,
5600                                                   audio_io_handle_t output,
5601                                                   audio_devices_t device,
5602                                                   int delayMs,
5603                                                   bool force)
5604{
5605
5606    // do not change actual stream volume if the stream is muted
5607    if (mOutputs.valueFor(output)->mMuteCount[stream] != 0) {
5608        ALOGVV("checkAndSetVolume() stream %d muted count %d",
5609              stream, mOutputs.valueFor(output)->mMuteCount[stream]);
5610        return NO_ERROR;
5611    }
5612
5613    // do not change in call volume if bluetooth is connected and vice versa
5614    if ((stream == AUDIO_STREAM_VOICE_CALL &&
5615            mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION] == AUDIO_POLICY_FORCE_BT_SCO) ||
5616        (stream == AUDIO_STREAM_BLUETOOTH_SCO &&
5617                mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION] != AUDIO_POLICY_FORCE_BT_SCO)) {
5618        ALOGV("checkAndSetVolume() cannot set stream %d volume with force use = %d for comm",
5619             stream, mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION]);
5620        return INVALID_OPERATION;
5621    }
5622
5623    float volume = computeVolume(stream, index, output, device);
5624    // unit gain if rerouting to external policy
5625    if (device == AUDIO_DEVICE_OUT_REMOTE_SUBMIX) {
5626        ssize_t index = mOutputs.indexOfKey(output);
5627        if (index >= 0) {
5628            sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(index);
5629            if (outputDesc->mPolicyMix != NULL) {
5630                ALOGV("max gain when rerouting for output=%d", output);
5631                volume = 1.0f;
5632            }
5633        }
5634
5635    }
5636    // We actually change the volume if:
5637    // - the float value returned by computeVolume() changed
5638    // - the force flag is set
5639    if (volume != mOutputs.valueFor(output)->mCurVolume[stream] ||
5640            force) {
5641        mOutputs.valueFor(output)->mCurVolume[stream] = volume;
5642        ALOGVV("checkAndSetVolume() for output %d stream %d, volume %f, delay %d", output, stream, volume, delayMs);
5643        // Force VOICE_CALL to track BLUETOOTH_SCO stream volume when bluetooth audio is
5644        // enabled
5645        if (stream == AUDIO_STREAM_BLUETOOTH_SCO) {
5646            mpClientInterface->setStreamVolume(AUDIO_STREAM_VOICE_CALL, volume, output, delayMs);
5647        }
5648        mpClientInterface->setStreamVolume(stream, volume, output, delayMs);
5649    }
5650
5651    if (stream == AUDIO_STREAM_VOICE_CALL ||
5652        stream == AUDIO_STREAM_BLUETOOTH_SCO) {
5653        float voiceVolume;
5654        // Force voice volume to max for bluetooth SCO as volume is managed by the headset
5655        if (stream == AUDIO_STREAM_VOICE_CALL) {
5656            voiceVolume = (float)index/(float)mStreams[stream].mIndexMax;
5657        } else {
5658            voiceVolume = 1.0;
5659        }
5660
5661        if (voiceVolume != mLastVoiceVolume && output == mPrimaryOutput) {
5662            mpClientInterface->setVoiceVolume(voiceVolume, delayMs);
5663            mLastVoiceVolume = voiceVolume;
5664        }
5665    }
5666
5667    return NO_ERROR;
5668}
5669
5670void AudioPolicyManager::applyStreamVolumes(audio_io_handle_t output,
5671                                                audio_devices_t device,
5672                                                int delayMs,
5673                                                bool force)
5674{
5675    ALOGVV("applyStreamVolumes() for output %d and device %x", output, device);
5676
5677    for (int stream = 0; stream < AUDIO_STREAM_CNT; stream++) {
5678        if (stream == AUDIO_STREAM_PATCH) {
5679            continue;
5680        }
5681        checkAndSetVolume((audio_stream_type_t)stream,
5682                          mStreams[stream].getVolumeIndex(device),
5683                          output,
5684                          device,
5685                          delayMs,
5686                          force);
5687    }
5688}
5689
5690void AudioPolicyManager::setStrategyMute(routing_strategy strategy,
5691                                             bool on,
5692                                             audio_io_handle_t output,
5693                                             int delayMs,
5694                                             audio_devices_t device)
5695{
5696    ALOGVV("setStrategyMute() strategy %d, mute %d, output %d", strategy, on, output);
5697    for (int stream = 0; stream < AUDIO_STREAM_CNT; stream++) {
5698        if (stream == AUDIO_STREAM_PATCH) {
5699            continue;
5700        }
5701        if (getStrategy((audio_stream_type_t)stream) == strategy) {
5702            setStreamMute((audio_stream_type_t)stream, on, output, delayMs, device);
5703        }
5704    }
5705}
5706
5707void AudioPolicyManager::setStreamMute(audio_stream_type_t stream,
5708                                           bool on,
5709                                           audio_io_handle_t output,
5710                                           int delayMs,
5711                                           audio_devices_t device)
5712{
5713    StreamDescriptor &streamDesc = mStreams[stream];
5714    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
5715    if (device == AUDIO_DEVICE_NONE) {
5716        device = outputDesc->device();
5717    }
5718
5719    ALOGVV("setStreamMute() stream %d, mute %d, output %d, mMuteCount %d device %04x",
5720          stream, on, output, outputDesc->mMuteCount[stream], device);
5721
5722    if (on) {
5723        if (outputDesc->mMuteCount[stream] == 0) {
5724            if (streamDesc.mCanBeMuted &&
5725                    ((stream != AUDIO_STREAM_ENFORCED_AUDIBLE) ||
5726                     (mForceUse[AUDIO_POLICY_FORCE_FOR_SYSTEM] == AUDIO_POLICY_FORCE_NONE))) {
5727                checkAndSetVolume(stream, 0, output, device, delayMs);
5728            }
5729        }
5730        // increment mMuteCount after calling checkAndSetVolume() so that volume change is not ignored
5731        outputDesc->mMuteCount[stream]++;
5732    } else {
5733        if (outputDesc->mMuteCount[stream] == 0) {
5734            ALOGV("setStreamMute() unmuting non muted stream!");
5735            return;
5736        }
5737        if (--outputDesc->mMuteCount[stream] == 0) {
5738            checkAndSetVolume(stream,
5739                              streamDesc.getVolumeIndex(device),
5740                              output,
5741                              device,
5742                              delayMs);
5743        }
5744    }
5745}
5746
5747void AudioPolicyManager::handleIncallSonification(audio_stream_type_t stream,
5748                                                      bool starting, bool stateChange)
5749{
5750    // if the stream pertains to sonification strategy and we are in call we must
5751    // mute the stream if it is low visibility. If it is high visibility, we must play a tone
5752    // in the device used for phone strategy and play the tone if the selected device does not
5753    // interfere with the device used for phone strategy
5754    // if stateChange is true, we are called from setPhoneState() and we must mute or unmute as
5755    // many times as there are active tracks on the output
5756    const routing_strategy stream_strategy = getStrategy(stream);
5757    if ((stream_strategy == STRATEGY_SONIFICATION) ||
5758            ((stream_strategy == STRATEGY_SONIFICATION_RESPECTFUL))) {
5759        sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(mPrimaryOutput);
5760        ALOGV("handleIncallSonification() stream %d starting %d device %x stateChange %d",
5761                stream, starting, outputDesc->mDevice, stateChange);
5762        if (outputDesc->mRefCount[stream]) {
5763            int muteCount = 1;
5764            if (stateChange) {
5765                muteCount = outputDesc->mRefCount[stream];
5766            }
5767            if (audio_is_low_visibility(stream)) {
5768                ALOGV("handleIncallSonification() low visibility, muteCount %d", muteCount);
5769                for (int i = 0; i < muteCount; i++) {
5770                    setStreamMute(stream, starting, mPrimaryOutput);
5771                }
5772            } else {
5773                ALOGV("handleIncallSonification() high visibility");
5774                if (outputDesc->device() &
5775                        getDeviceForStrategy(STRATEGY_PHONE, true /*fromCache*/)) {
5776                    ALOGV("handleIncallSonification() high visibility muted, muteCount %d", muteCount);
5777                    for (int i = 0; i < muteCount; i++) {
5778                        setStreamMute(stream, starting, mPrimaryOutput);
5779                    }
5780                }
5781                if (starting) {
5782                    mpClientInterface->startTone(AUDIO_POLICY_TONE_IN_CALL_NOTIFICATION,
5783                                                 AUDIO_STREAM_VOICE_CALL);
5784                } else {
5785                    mpClientInterface->stopTone();
5786                }
5787            }
5788        }
5789    }
5790}
5791
5792bool AudioPolicyManager::isInCall()
5793{
5794    return isStateInCall(mPhoneState);
5795}
5796
5797bool AudioPolicyManager::isStateInCall(int state) {
5798    return ((state == AUDIO_MODE_IN_CALL) ||
5799            (state == AUDIO_MODE_IN_COMMUNICATION));
5800}
5801
5802uint32_t AudioPolicyManager::getMaxEffectsCpuLoad()
5803{
5804    return MAX_EFFECTS_CPU_LOAD;
5805}
5806
5807uint32_t AudioPolicyManager::getMaxEffectsMemory()
5808{
5809    return MAX_EFFECTS_MEMORY;
5810}
5811
5812
5813// --- AudioOutputDescriptor class implementation
5814
5815AudioPolicyManager::AudioOutputDescriptor::AudioOutputDescriptor(
5816        const sp<IOProfile>& profile)
5817    : mId(0), mIoHandle(0), mLatency(0),
5818    mFlags((audio_output_flags_t)0), mDevice(AUDIO_DEVICE_NONE), mPolicyMix(NULL),
5819    mPatchHandle(0),
5820    mOutput1(0), mOutput2(0), mProfile(profile), mDirectOpenCount(0)
5821{
5822    // clear usage count for all stream types
5823    for (int i = 0; i < AUDIO_STREAM_CNT; i++) {
5824        mRefCount[i] = 0;
5825        mCurVolume[i] = -1.0;
5826        mMuteCount[i] = 0;
5827        mStopTime[i] = 0;
5828    }
5829    for (int i = 0; i < NUM_STRATEGIES; i++) {
5830        mStrategyMutedByDevice[i] = false;
5831    }
5832    if (profile != NULL) {
5833        mFlags = (audio_output_flags_t)profile->mFlags;
5834        mSamplingRate = profile->pickSamplingRate();
5835        mFormat = profile->pickFormat();
5836        mChannelMask = profile->pickChannelMask();
5837        if (profile->mGains.size() > 0) {
5838            profile->mGains[0]->getDefaultConfig(&mGain);
5839        }
5840    }
5841}
5842
5843audio_devices_t AudioPolicyManager::AudioOutputDescriptor::device() const
5844{
5845    if (isDuplicated()) {
5846        return (audio_devices_t)(mOutput1->mDevice | mOutput2->mDevice);
5847    } else {
5848        return mDevice;
5849    }
5850}
5851
5852uint32_t AudioPolicyManager::AudioOutputDescriptor::latency()
5853{
5854    if (isDuplicated()) {
5855        return (mOutput1->mLatency > mOutput2->mLatency) ? mOutput1->mLatency : mOutput2->mLatency;
5856    } else {
5857        return mLatency;
5858    }
5859}
5860
5861bool AudioPolicyManager::AudioOutputDescriptor::sharesHwModuleWith(
5862        const sp<AudioOutputDescriptor> outputDesc)
5863{
5864    if (isDuplicated()) {
5865        return mOutput1->sharesHwModuleWith(outputDesc) || mOutput2->sharesHwModuleWith(outputDesc);
5866    } else if (outputDesc->isDuplicated()){
5867        return sharesHwModuleWith(outputDesc->mOutput1) || sharesHwModuleWith(outputDesc->mOutput2);
5868    } else {
5869        return (mProfile->mModule == outputDesc->mProfile->mModule);
5870    }
5871}
5872
5873void AudioPolicyManager::AudioOutputDescriptor::changeRefCount(audio_stream_type_t stream,
5874                                                                   int delta)
5875{
5876    // forward usage count change to attached outputs
5877    if (isDuplicated()) {
5878        mOutput1->changeRefCount(stream, delta);
5879        mOutput2->changeRefCount(stream, delta);
5880    }
5881    if ((delta + (int)mRefCount[stream]) < 0) {
5882        ALOGW("changeRefCount() invalid delta %d for stream %d, refCount %d",
5883              delta, stream, mRefCount[stream]);
5884        mRefCount[stream] = 0;
5885        return;
5886    }
5887    mRefCount[stream] += delta;
5888    ALOGV("changeRefCount() stream %d, count %d", stream, mRefCount[stream]);
5889}
5890
5891audio_devices_t AudioPolicyManager::AudioOutputDescriptor::supportedDevices()
5892{
5893    if (isDuplicated()) {
5894        return (audio_devices_t)(mOutput1->supportedDevices() | mOutput2->supportedDevices());
5895    } else {
5896        return mProfile->mSupportedDevices.types() ;
5897    }
5898}
5899
5900bool AudioPolicyManager::AudioOutputDescriptor::isActive(uint32_t inPastMs) const
5901{
5902    return isStrategyActive(NUM_STRATEGIES, inPastMs);
5903}
5904
5905bool AudioPolicyManager::AudioOutputDescriptor::isStrategyActive(routing_strategy strategy,
5906                                                                       uint32_t inPastMs,
5907                                                                       nsecs_t sysTime) const
5908{
5909    if ((sysTime == 0) && (inPastMs != 0)) {
5910        sysTime = systemTime();
5911    }
5912    for (int i = 0; i < (int)AUDIO_STREAM_CNT; i++) {
5913        if (i == AUDIO_STREAM_PATCH) {
5914            continue;
5915        }
5916        if (((getStrategy((audio_stream_type_t)i) == strategy) ||
5917                (NUM_STRATEGIES == strategy)) &&
5918                isStreamActive((audio_stream_type_t)i, inPastMs, sysTime)) {
5919            return true;
5920        }
5921    }
5922    return false;
5923}
5924
5925bool AudioPolicyManager::AudioOutputDescriptor::isStreamActive(audio_stream_type_t stream,
5926                                                                       uint32_t inPastMs,
5927                                                                       nsecs_t sysTime) const
5928{
5929    if (mRefCount[stream] != 0) {
5930        return true;
5931    }
5932    if (inPastMs == 0) {
5933        return false;
5934    }
5935    if (sysTime == 0) {
5936        sysTime = systemTime();
5937    }
5938    if (ns2ms(sysTime - mStopTime[stream]) < inPastMs) {
5939        return true;
5940    }
5941    return false;
5942}
5943
5944void AudioPolicyManager::AudioOutputDescriptor::toAudioPortConfig(
5945                                                 struct audio_port_config *dstConfig,
5946                                                 const struct audio_port_config *srcConfig) const
5947{
5948    ALOG_ASSERT(!isDuplicated(), "toAudioPortConfig() called on duplicated output %d", mIoHandle);
5949
5950    dstConfig->config_mask = AUDIO_PORT_CONFIG_SAMPLE_RATE|AUDIO_PORT_CONFIG_CHANNEL_MASK|
5951                            AUDIO_PORT_CONFIG_FORMAT|AUDIO_PORT_CONFIG_GAIN;
5952    if (srcConfig != NULL) {
5953        dstConfig->config_mask |= srcConfig->config_mask;
5954    }
5955    AudioPortConfig::toAudioPortConfig(dstConfig, srcConfig);
5956
5957    dstConfig->id = mId;
5958    dstConfig->role = AUDIO_PORT_ROLE_SOURCE;
5959    dstConfig->type = AUDIO_PORT_TYPE_MIX;
5960    dstConfig->ext.mix.hw_module = mProfile->mModule->mHandle;
5961    dstConfig->ext.mix.handle = mIoHandle;
5962    dstConfig->ext.mix.usecase.stream = AUDIO_STREAM_DEFAULT;
5963}
5964
5965void AudioPolicyManager::AudioOutputDescriptor::toAudioPort(
5966                                                    struct audio_port *port) const
5967{
5968    ALOG_ASSERT(!isDuplicated(), "toAudioPort() called on duplicated output %d", mIoHandle);
5969    mProfile->toAudioPort(port);
5970    port->id = mId;
5971    toAudioPortConfig(&port->active_config);
5972    port->ext.mix.hw_module = mProfile->mModule->mHandle;
5973    port->ext.mix.handle = mIoHandle;
5974    port->ext.mix.latency_class =
5975            mFlags & AUDIO_OUTPUT_FLAG_FAST ? AUDIO_LATENCY_LOW : AUDIO_LATENCY_NORMAL;
5976}
5977
5978status_t AudioPolicyManager::AudioOutputDescriptor::dump(int fd)
5979{
5980    const size_t SIZE = 256;
5981    char buffer[SIZE];
5982    String8 result;
5983
5984    snprintf(buffer, SIZE, " ID: %d\n", mId);
5985    result.append(buffer);
5986    snprintf(buffer, SIZE, " Sampling rate: %d\n", mSamplingRate);
5987    result.append(buffer);
5988    snprintf(buffer, SIZE, " Format: %08x\n", mFormat);
5989    result.append(buffer);
5990    snprintf(buffer, SIZE, " Channels: %08x\n", mChannelMask);
5991    result.append(buffer);
5992    snprintf(buffer, SIZE, " Latency: %d\n", mLatency);
5993    result.append(buffer);
5994    snprintf(buffer, SIZE, " Flags %08x\n", mFlags);
5995    result.append(buffer);
5996    snprintf(buffer, SIZE, " Devices %08x\n", device());
5997    result.append(buffer);
5998    snprintf(buffer, SIZE, " Stream volume refCount muteCount\n");
5999    result.append(buffer);
6000    for (int i = 0; i < (int)AUDIO_STREAM_CNT; i++) {
6001        snprintf(buffer, SIZE, " %02d     %.03f     %02d       %02d\n",
6002                 i, mCurVolume[i], mRefCount[i], mMuteCount[i]);
6003        result.append(buffer);
6004    }
6005    write(fd, result.string(), result.size());
6006
6007    return NO_ERROR;
6008}
6009
6010// --- AudioInputDescriptor class implementation
6011
6012AudioPolicyManager::AudioInputDescriptor::AudioInputDescriptor(const sp<IOProfile>& profile)
6013    : mId(0), mIoHandle(0),
6014      mDevice(AUDIO_DEVICE_NONE), mPolicyMix(NULL), mPatchHandle(0), mRefCount(0),
6015      mInputSource(AUDIO_SOURCE_DEFAULT), mProfile(profile), mIsSoundTrigger(false)
6016{
6017    if (profile != NULL) {
6018        mSamplingRate = profile->pickSamplingRate();
6019        mFormat = profile->pickFormat();
6020        mChannelMask = profile->pickChannelMask();
6021        if (profile->mGains.size() > 0) {
6022            profile->mGains[0]->getDefaultConfig(&mGain);
6023        }
6024    }
6025}
6026
6027void AudioPolicyManager::AudioInputDescriptor::toAudioPortConfig(
6028                                                   struct audio_port_config *dstConfig,
6029                                                   const struct audio_port_config *srcConfig) const
6030{
6031    ALOG_ASSERT(mProfile != 0,
6032                "toAudioPortConfig() called on input with null profile %d", mIoHandle);
6033    dstConfig->config_mask = AUDIO_PORT_CONFIG_SAMPLE_RATE|AUDIO_PORT_CONFIG_CHANNEL_MASK|
6034                            AUDIO_PORT_CONFIG_FORMAT|AUDIO_PORT_CONFIG_GAIN;
6035    if (srcConfig != NULL) {
6036        dstConfig->config_mask |= srcConfig->config_mask;
6037    }
6038
6039    AudioPortConfig::toAudioPortConfig(dstConfig, srcConfig);
6040
6041    dstConfig->id = mId;
6042    dstConfig->role = AUDIO_PORT_ROLE_SINK;
6043    dstConfig->type = AUDIO_PORT_TYPE_MIX;
6044    dstConfig->ext.mix.hw_module = mProfile->mModule->mHandle;
6045    dstConfig->ext.mix.handle = mIoHandle;
6046    dstConfig->ext.mix.usecase.source = mInputSource;
6047}
6048
6049void AudioPolicyManager::AudioInputDescriptor::toAudioPort(
6050                                                    struct audio_port *port) const
6051{
6052    ALOG_ASSERT(mProfile != 0, "toAudioPort() called on input with null profile %d", mIoHandle);
6053
6054    mProfile->toAudioPort(port);
6055    port->id = mId;
6056    toAudioPortConfig(&port->active_config);
6057    port->ext.mix.hw_module = mProfile->mModule->mHandle;
6058    port->ext.mix.handle = mIoHandle;
6059    port->ext.mix.latency_class = AUDIO_LATENCY_NORMAL;
6060}
6061
6062status_t AudioPolicyManager::AudioInputDescriptor::dump(int fd)
6063{
6064    const size_t SIZE = 256;
6065    char buffer[SIZE];
6066    String8 result;
6067
6068    snprintf(buffer, SIZE, " ID: %d\n", mId);
6069    result.append(buffer);
6070    snprintf(buffer, SIZE, " Sampling rate: %d\n", mSamplingRate);
6071    result.append(buffer);
6072    snprintf(buffer, SIZE, " Format: %d\n", mFormat);
6073    result.append(buffer);
6074    snprintf(buffer, SIZE, " Channels: %08x\n", mChannelMask);
6075    result.append(buffer);
6076    snprintf(buffer, SIZE, " Devices %08x\n", mDevice);
6077    result.append(buffer);
6078    snprintf(buffer, SIZE, " Ref Count %d\n", mRefCount);
6079    result.append(buffer);
6080    snprintf(buffer, SIZE, " Open Ref Count %d\n", mOpenRefCount);
6081    result.append(buffer);
6082
6083    write(fd, result.string(), result.size());
6084
6085    return NO_ERROR;
6086}
6087
6088// --- StreamDescriptor class implementation
6089
6090AudioPolicyManager::StreamDescriptor::StreamDescriptor()
6091    :   mIndexMin(0), mIndexMax(1), mCanBeMuted(true)
6092{
6093    mIndexCur.add(AUDIO_DEVICE_OUT_DEFAULT, 0);
6094}
6095
6096int AudioPolicyManager::StreamDescriptor::getVolumeIndex(audio_devices_t device)
6097{
6098    device = AudioPolicyManager::getDeviceForVolume(device);
6099    // there is always a valid entry for AUDIO_DEVICE_OUT_DEFAULT
6100    if (mIndexCur.indexOfKey(device) < 0) {
6101        device = AUDIO_DEVICE_OUT_DEFAULT;
6102    }
6103    return mIndexCur.valueFor(device);
6104}
6105
6106void AudioPolicyManager::StreamDescriptor::dump(int fd)
6107{
6108    const size_t SIZE = 256;
6109    char buffer[SIZE];
6110    String8 result;
6111
6112    snprintf(buffer, SIZE, "%s         %02d         %02d         ",
6113             mCanBeMuted ? "true " : "false", mIndexMin, mIndexMax);
6114    result.append(buffer);
6115    for (size_t i = 0; i < mIndexCur.size(); i++) {
6116        snprintf(buffer, SIZE, "%04x : %02d, ",
6117                 mIndexCur.keyAt(i),
6118                 mIndexCur.valueAt(i));
6119        result.append(buffer);
6120    }
6121    result.append("\n");
6122
6123    write(fd, result.string(), result.size());
6124}
6125
6126// --- EffectDescriptor class implementation
6127
6128status_t AudioPolicyManager::EffectDescriptor::dump(int fd)
6129{
6130    const size_t SIZE = 256;
6131    char buffer[SIZE];
6132    String8 result;
6133
6134    snprintf(buffer, SIZE, " I/O: %d\n", mIo);
6135    result.append(buffer);
6136    snprintf(buffer, SIZE, " Strategy: %d\n", mStrategy);
6137    result.append(buffer);
6138    snprintf(buffer, SIZE, " Session: %d\n", mSession);
6139    result.append(buffer);
6140    snprintf(buffer, SIZE, " Name: %s\n",  mDesc.name);
6141    result.append(buffer);
6142    snprintf(buffer, SIZE, " %s\n",  mEnabled ? "Enabled" : "Disabled");
6143    result.append(buffer);
6144    write(fd, result.string(), result.size());
6145
6146    return NO_ERROR;
6147}
6148
6149// --- HwModule class implementation
6150
6151AudioPolicyManager::HwModule::HwModule(const char *name)
6152    : mName(strndup(name, AUDIO_HARDWARE_MODULE_ID_MAX_LEN)),
6153      mHalVersion(AUDIO_DEVICE_API_VERSION_MIN), mHandle(0)
6154{
6155}
6156
6157AudioPolicyManager::HwModule::~HwModule()
6158{
6159    for (size_t i = 0; i < mOutputProfiles.size(); i++) {
6160        mOutputProfiles[i]->mSupportedDevices.clear();
6161    }
6162    for (size_t i = 0; i < mInputProfiles.size(); i++) {
6163        mInputProfiles[i]->mSupportedDevices.clear();
6164    }
6165    free((void *)mName);
6166}
6167
6168status_t AudioPolicyManager::HwModule::loadInput(cnode *root)
6169{
6170    cnode *node = root->first_child;
6171
6172    sp<IOProfile> profile = new IOProfile(String8(root->name), AUDIO_PORT_ROLE_SINK, this);
6173
6174    while (node) {
6175        if (strcmp(node->name, SAMPLING_RATES_TAG) == 0) {
6176            profile->loadSamplingRates((char *)node->value);
6177        } else if (strcmp(node->name, FORMATS_TAG) == 0) {
6178            profile->loadFormats((char *)node->value);
6179        } else if (strcmp(node->name, CHANNELS_TAG) == 0) {
6180            profile->loadInChannels((char *)node->value);
6181        } else if (strcmp(node->name, DEVICES_TAG) == 0) {
6182            profile->mSupportedDevices.loadDevicesFromName((char *)node->value,
6183                                                           mDeclaredDevices);
6184        } else if (strcmp(node->name, FLAGS_TAG) == 0) {
6185            profile->mFlags = parseInputFlagNames((char *)node->value);
6186        } else if (strcmp(node->name, GAINS_TAG) == 0) {
6187            profile->loadGains(node);
6188        }
6189        node = node->next;
6190    }
6191    ALOGW_IF(profile->mSupportedDevices.isEmpty(),
6192            "loadInput() invalid supported devices");
6193    ALOGW_IF(profile->mChannelMasks.size() == 0,
6194            "loadInput() invalid supported channel masks");
6195    ALOGW_IF(profile->mSamplingRates.size() == 0,
6196            "loadInput() invalid supported sampling rates");
6197    ALOGW_IF(profile->mFormats.size() == 0,
6198            "loadInput() invalid supported formats");
6199    if (!profile->mSupportedDevices.isEmpty() &&
6200            (profile->mChannelMasks.size() != 0) &&
6201            (profile->mSamplingRates.size() != 0) &&
6202            (profile->mFormats.size() != 0)) {
6203
6204        ALOGV("loadInput() adding input Supported Devices %04x",
6205              profile->mSupportedDevices.types());
6206
6207        mInputProfiles.add(profile);
6208        return NO_ERROR;
6209    } else {
6210        return BAD_VALUE;
6211    }
6212}
6213
6214status_t AudioPolicyManager::HwModule::loadOutput(cnode *root)
6215{
6216    cnode *node = root->first_child;
6217
6218    sp<IOProfile> profile = new IOProfile(String8(root->name), AUDIO_PORT_ROLE_SOURCE, this);
6219
6220    while (node) {
6221        if (strcmp(node->name, SAMPLING_RATES_TAG) == 0) {
6222            profile->loadSamplingRates((char *)node->value);
6223        } else if (strcmp(node->name, FORMATS_TAG) == 0) {
6224            profile->loadFormats((char *)node->value);
6225        } else if (strcmp(node->name, CHANNELS_TAG) == 0) {
6226            profile->loadOutChannels((char *)node->value);
6227        } else if (strcmp(node->name, DEVICES_TAG) == 0) {
6228            profile->mSupportedDevices.loadDevicesFromName((char *)node->value,
6229                                                           mDeclaredDevices);
6230        } else if (strcmp(node->name, FLAGS_TAG) == 0) {
6231            profile->mFlags = parseOutputFlagNames((char *)node->value);
6232        } else if (strcmp(node->name, GAINS_TAG) == 0) {
6233            profile->loadGains(node);
6234        }
6235        node = node->next;
6236    }
6237    ALOGW_IF(profile->mSupportedDevices.isEmpty(),
6238            "loadOutput() invalid supported devices");
6239    ALOGW_IF(profile->mChannelMasks.size() == 0,
6240            "loadOutput() invalid supported channel masks");
6241    ALOGW_IF(profile->mSamplingRates.size() == 0,
6242            "loadOutput() invalid supported sampling rates");
6243    ALOGW_IF(profile->mFormats.size() == 0,
6244            "loadOutput() invalid supported formats");
6245    if (!profile->mSupportedDevices.isEmpty() &&
6246            (profile->mChannelMasks.size() != 0) &&
6247            (profile->mSamplingRates.size() != 0) &&
6248            (profile->mFormats.size() != 0)) {
6249
6250        ALOGV("loadOutput() adding output Supported Devices %04x, mFlags %04x",
6251              profile->mSupportedDevices.types(), profile->mFlags);
6252
6253        mOutputProfiles.add(profile);
6254        return NO_ERROR;
6255    } else {
6256        return BAD_VALUE;
6257    }
6258}
6259
6260status_t AudioPolicyManager::HwModule::loadDevice(cnode *root)
6261{
6262    cnode *node = root->first_child;
6263
6264    audio_devices_t type = AUDIO_DEVICE_NONE;
6265    while (node) {
6266        if (strcmp(node->name, DEVICE_TYPE) == 0) {
6267            type = parseDeviceNames((char *)node->value);
6268            break;
6269        }
6270        node = node->next;
6271    }
6272    if (type == AUDIO_DEVICE_NONE ||
6273            (!audio_is_input_device(type) && !audio_is_output_device(type))) {
6274        ALOGW("loadDevice() bad type %08x", type);
6275        return BAD_VALUE;
6276    }
6277    sp<DeviceDescriptor> deviceDesc = new DeviceDescriptor(String8(root->name), type);
6278    deviceDesc->mModule = this;
6279
6280    node = root->first_child;
6281    while (node) {
6282        if (strcmp(node->name, DEVICE_ADDRESS) == 0) {
6283            deviceDesc->mAddress = String8((char *)node->value);
6284        } else if (strcmp(node->name, CHANNELS_TAG) == 0) {
6285            if (audio_is_input_device(type)) {
6286                deviceDesc->loadInChannels((char *)node->value);
6287            } else {
6288                deviceDesc->loadOutChannels((char *)node->value);
6289            }
6290        } else if (strcmp(node->name, GAINS_TAG) == 0) {
6291            deviceDesc->loadGains(node);
6292        }
6293        node = node->next;
6294    }
6295
6296    ALOGV("loadDevice() adding device name %s type %08x address %s",
6297          deviceDesc->mName.string(), type, deviceDesc->mAddress.string());
6298
6299    mDeclaredDevices.add(deviceDesc);
6300
6301    return NO_ERROR;
6302}
6303
6304status_t AudioPolicyManager::HwModule::addOutputProfile(String8 name, const audio_config_t *config,
6305                                                  audio_devices_t device, String8 address)
6306{
6307    sp<IOProfile> profile = new IOProfile(name, AUDIO_PORT_ROLE_SOURCE, this);
6308
6309    profile->mSamplingRates.add(config->sample_rate);
6310    profile->mChannelMasks.add(config->channel_mask);
6311    profile->mFormats.add(config->format);
6312
6313    sp<DeviceDescriptor> devDesc = new DeviceDescriptor(String8(""), device);
6314    devDesc->mAddress = address;
6315    profile->mSupportedDevices.add(devDesc);
6316
6317    mOutputProfiles.add(profile);
6318
6319    return NO_ERROR;
6320}
6321
6322status_t AudioPolicyManager::HwModule::removeOutputProfile(String8 name)
6323{
6324    for (size_t i = 0; i < mOutputProfiles.size(); i++) {
6325        if (mOutputProfiles[i]->mName == name) {
6326            mOutputProfiles.removeAt(i);
6327            break;
6328        }
6329    }
6330
6331    return NO_ERROR;
6332}
6333
6334status_t AudioPolicyManager::HwModule::addInputProfile(String8 name, const audio_config_t *config,
6335                                                  audio_devices_t device, String8 address)
6336{
6337    sp<IOProfile> profile = new IOProfile(name, AUDIO_PORT_ROLE_SINK, this);
6338
6339    profile->mSamplingRates.add(config->sample_rate);
6340    profile->mChannelMasks.add(config->channel_mask);
6341    profile->mFormats.add(config->format);
6342
6343    sp<DeviceDescriptor> devDesc = new DeviceDescriptor(String8(""), device);
6344    devDesc->mAddress = address;
6345    profile->mSupportedDevices.add(devDesc);
6346
6347    ALOGV("addInputProfile() name %s rate %d mask 0x08", name.string(), config->sample_rate, config->channel_mask);
6348
6349    mInputProfiles.add(profile);
6350
6351    return NO_ERROR;
6352}
6353
6354status_t AudioPolicyManager::HwModule::removeInputProfile(String8 name)
6355{
6356    for (size_t i = 0; i < mInputProfiles.size(); i++) {
6357        if (mInputProfiles[i]->mName == name) {
6358            mInputProfiles.removeAt(i);
6359            break;
6360        }
6361    }
6362
6363    return NO_ERROR;
6364}
6365
6366
6367void AudioPolicyManager::HwModule::dump(int fd)
6368{
6369    const size_t SIZE = 256;
6370    char buffer[SIZE];
6371    String8 result;
6372
6373    snprintf(buffer, SIZE, "  - name: %s\n", mName);
6374    result.append(buffer);
6375    snprintf(buffer, SIZE, "  - handle: %d\n", mHandle);
6376    result.append(buffer);
6377    snprintf(buffer, SIZE, "  - version: %u.%u\n", mHalVersion >> 8, mHalVersion & 0xFF);
6378    result.append(buffer);
6379    write(fd, result.string(), result.size());
6380    if (mOutputProfiles.size()) {
6381        write(fd, "  - outputs:\n", strlen("  - outputs:\n"));
6382        for (size_t i = 0; i < mOutputProfiles.size(); i++) {
6383            snprintf(buffer, SIZE, "    output %zu:\n", i);
6384            write(fd, buffer, strlen(buffer));
6385            mOutputProfiles[i]->dump(fd);
6386        }
6387    }
6388    if (mInputProfiles.size()) {
6389        write(fd, "  - inputs:\n", strlen("  - inputs:\n"));
6390        for (size_t i = 0; i < mInputProfiles.size(); i++) {
6391            snprintf(buffer, SIZE, "    input %zu:\n", i);
6392            write(fd, buffer, strlen(buffer));
6393            mInputProfiles[i]->dump(fd);
6394        }
6395    }
6396    if (mDeclaredDevices.size()) {
6397        write(fd, "  - devices:\n", strlen("  - devices:\n"));
6398        for (size_t i = 0; i < mDeclaredDevices.size(); i++) {
6399            mDeclaredDevices[i]->dump(fd, 4, i);
6400        }
6401    }
6402}
6403
6404// --- AudioPort class implementation
6405
6406
6407AudioPolicyManager::AudioPort::AudioPort(const String8& name, audio_port_type_t type,
6408          audio_port_role_t role, const sp<HwModule>& module) :
6409    mName(name), mType(type), mRole(role), mModule(module), mFlags(0)
6410{
6411    mUseInChannelMask = ((type == AUDIO_PORT_TYPE_DEVICE) && (role == AUDIO_PORT_ROLE_SOURCE)) ||
6412                    ((type == AUDIO_PORT_TYPE_MIX) && (role == AUDIO_PORT_ROLE_SINK));
6413}
6414
6415void AudioPolicyManager::AudioPort::toAudioPort(struct audio_port *port) const
6416{
6417    port->role = mRole;
6418    port->type = mType;
6419    unsigned int i;
6420    for (i = 0; i < mSamplingRates.size() && i < AUDIO_PORT_MAX_SAMPLING_RATES; i++) {
6421        if (mSamplingRates[i] != 0) {
6422            port->sample_rates[i] = mSamplingRates[i];
6423        }
6424    }
6425    port->num_sample_rates = i;
6426    for (i = 0; i < mChannelMasks.size() && i < AUDIO_PORT_MAX_CHANNEL_MASKS; i++) {
6427        if (mChannelMasks[i] != 0) {
6428            port->channel_masks[i] = mChannelMasks[i];
6429        }
6430    }
6431    port->num_channel_masks = i;
6432    for (i = 0; i < mFormats.size() && i < AUDIO_PORT_MAX_FORMATS; i++) {
6433        if (mFormats[i] != 0) {
6434            port->formats[i] = mFormats[i];
6435        }
6436    }
6437    port->num_formats = i;
6438
6439    ALOGV("AudioPort::toAudioPort() num gains %zu", mGains.size());
6440
6441    for (i = 0; i < mGains.size() && i < AUDIO_PORT_MAX_GAINS; i++) {
6442        port->gains[i] = mGains[i]->mGain;
6443    }
6444    port->num_gains = i;
6445}
6446
6447void AudioPolicyManager::AudioPort::importAudioPort(const sp<AudioPort> port) {
6448    for (size_t k = 0 ; k < port->mSamplingRates.size() ; k++) {
6449        const uint32_t rate = port->mSamplingRates.itemAt(k);
6450        if (rate != 0) { // skip "dynamic" rates
6451            bool hasRate = false;
6452            for (size_t l = 0 ; l < mSamplingRates.size() ; l++) {
6453                if (rate == mSamplingRates.itemAt(l)) {
6454                    hasRate = true;
6455                    break;
6456                }
6457            }
6458            if (!hasRate) { // never import a sampling rate twice
6459                mSamplingRates.add(rate);
6460            }
6461        }
6462    }
6463    for (size_t k = 0 ; k < port->mChannelMasks.size() ; k++) {
6464        const audio_channel_mask_t mask = port->mChannelMasks.itemAt(k);
6465        if (mask != 0) { // skip "dynamic" masks
6466            bool hasMask = false;
6467            for (size_t l = 0 ; l < mChannelMasks.size() ; l++) {
6468                if (mask == mChannelMasks.itemAt(l)) {
6469                    hasMask = true;
6470                    break;
6471                }
6472            }
6473            if (!hasMask) { // never import a channel mask twice
6474                mChannelMasks.add(mask);
6475            }
6476        }
6477    }
6478    for (size_t k = 0 ; k < port->mFormats.size() ; k++) {
6479        const audio_format_t format = port->mFormats.itemAt(k);
6480        if (format != 0) { // skip "dynamic" formats
6481            bool hasFormat = false;
6482            for (size_t l = 0 ; l < mFormats.size() ; l++) {
6483                if (format == mFormats.itemAt(l)) {
6484                    hasFormat = true;
6485                    break;
6486                }
6487            }
6488            if (!hasFormat) { // never import a channel mask twice
6489                mFormats.add(format);
6490            }
6491        }
6492    }
6493    for (size_t k = 0 ; k < port->mGains.size() ; k++) {
6494        sp<AudioGain> gain = port->mGains.itemAt(k);
6495        if (gain != 0) {
6496            bool hasGain = false;
6497            for (size_t l = 0 ; l < mGains.size() ; l++) {
6498                if (gain == mGains.itemAt(l)) {
6499                    hasGain = true;
6500                    break;
6501                }
6502            }
6503            if (!hasGain) { // never import a gain twice
6504                mGains.add(gain);
6505            }
6506        }
6507    }
6508}
6509
6510void AudioPolicyManager::AudioPort::clearCapabilities() {
6511    mChannelMasks.clear();
6512    mFormats.clear();
6513    mSamplingRates.clear();
6514    mGains.clear();
6515}
6516
6517void AudioPolicyManager::AudioPort::loadSamplingRates(char *name)
6518{
6519    char *str = strtok(name, "|");
6520
6521    // by convention, "0' in the first entry in mSamplingRates indicates the supported sampling
6522    // rates should be read from the output stream after it is opened for the first time
6523    if (str != NULL && strcmp(str, DYNAMIC_VALUE_TAG) == 0) {
6524        mSamplingRates.add(0);
6525        return;
6526    }
6527
6528    while (str != NULL) {
6529        uint32_t rate = atoi(str);
6530        if (rate != 0) {
6531            ALOGV("loadSamplingRates() adding rate %d", rate);
6532            mSamplingRates.add(rate);
6533        }
6534        str = strtok(NULL, "|");
6535    }
6536}
6537
6538void AudioPolicyManager::AudioPort::loadFormats(char *name)
6539{
6540    char *str = strtok(name, "|");
6541
6542    // by convention, "0' in the first entry in mFormats indicates the supported formats
6543    // should be read from the output stream after it is opened for the first time
6544    if (str != NULL && strcmp(str, DYNAMIC_VALUE_TAG) == 0) {
6545        mFormats.add(AUDIO_FORMAT_DEFAULT);
6546        return;
6547    }
6548
6549    while (str != NULL) {
6550        audio_format_t format = (audio_format_t)stringToEnum(sFormatNameToEnumTable,
6551                                                             ARRAY_SIZE(sFormatNameToEnumTable),
6552                                                             str);
6553        if (format != AUDIO_FORMAT_DEFAULT) {
6554            mFormats.add(format);
6555        }
6556        str = strtok(NULL, "|");
6557    }
6558}
6559
6560void AudioPolicyManager::AudioPort::loadInChannels(char *name)
6561{
6562    const char *str = strtok(name, "|");
6563
6564    ALOGV("loadInChannels() %s", name);
6565
6566    if (str != NULL && strcmp(str, DYNAMIC_VALUE_TAG) == 0) {
6567        mChannelMasks.add(0);
6568        return;
6569    }
6570
6571    while (str != NULL) {
6572        audio_channel_mask_t channelMask =
6573                (audio_channel_mask_t)stringToEnum(sInChannelsNameToEnumTable,
6574                                                   ARRAY_SIZE(sInChannelsNameToEnumTable),
6575                                                   str);
6576        if (channelMask != 0) {
6577            ALOGV("loadInChannels() adding channelMask %04x", channelMask);
6578            mChannelMasks.add(channelMask);
6579        }
6580        str = strtok(NULL, "|");
6581    }
6582}
6583
6584void AudioPolicyManager::AudioPort::loadOutChannels(char *name)
6585{
6586    const char *str = strtok(name, "|");
6587
6588    ALOGV("loadOutChannels() %s", name);
6589
6590    // by convention, "0' in the first entry in mChannelMasks indicates the supported channel
6591    // masks should be read from the output stream after it is opened for the first time
6592    if (str != NULL && strcmp(str, DYNAMIC_VALUE_TAG) == 0) {
6593        mChannelMasks.add(0);
6594        return;
6595    }
6596
6597    while (str != NULL) {
6598        audio_channel_mask_t channelMask =
6599                (audio_channel_mask_t)stringToEnum(sOutChannelsNameToEnumTable,
6600                                                   ARRAY_SIZE(sOutChannelsNameToEnumTable),
6601                                                   str);
6602        if (channelMask != 0) {
6603            mChannelMasks.add(channelMask);
6604        }
6605        str = strtok(NULL, "|");
6606    }
6607    return;
6608}
6609
6610audio_gain_mode_t AudioPolicyManager::AudioPort::loadGainMode(char *name)
6611{
6612    const char *str = strtok(name, "|");
6613
6614    ALOGV("loadGainMode() %s", name);
6615    audio_gain_mode_t mode = 0;
6616    while (str != NULL) {
6617        mode |= (audio_gain_mode_t)stringToEnum(sGainModeNameToEnumTable,
6618                                                ARRAY_SIZE(sGainModeNameToEnumTable),
6619                                                str);
6620        str = strtok(NULL, "|");
6621    }
6622    return mode;
6623}
6624
6625void AudioPolicyManager::AudioPort::loadGain(cnode *root, int index)
6626{
6627    cnode *node = root->first_child;
6628
6629    sp<AudioGain> gain = new AudioGain(index, mUseInChannelMask);
6630
6631    while (node) {
6632        if (strcmp(node->name, GAIN_MODE) == 0) {
6633            gain->mGain.mode = loadGainMode((char *)node->value);
6634        } else if (strcmp(node->name, GAIN_CHANNELS) == 0) {
6635            if (mUseInChannelMask) {
6636                gain->mGain.channel_mask =
6637                        (audio_channel_mask_t)stringToEnum(sInChannelsNameToEnumTable,
6638                                                           ARRAY_SIZE(sInChannelsNameToEnumTable),
6639                                                           (char *)node->value);
6640            } else {
6641                gain->mGain.channel_mask =
6642                        (audio_channel_mask_t)stringToEnum(sOutChannelsNameToEnumTable,
6643                                                           ARRAY_SIZE(sOutChannelsNameToEnumTable),
6644                                                           (char *)node->value);
6645            }
6646        } else if (strcmp(node->name, GAIN_MIN_VALUE) == 0) {
6647            gain->mGain.min_value = atoi((char *)node->value);
6648        } else if (strcmp(node->name, GAIN_MAX_VALUE) == 0) {
6649            gain->mGain.max_value = atoi((char *)node->value);
6650        } else if (strcmp(node->name, GAIN_DEFAULT_VALUE) == 0) {
6651            gain->mGain.default_value = atoi((char *)node->value);
6652        } else if (strcmp(node->name, GAIN_STEP_VALUE) == 0) {
6653            gain->mGain.step_value = atoi((char *)node->value);
6654        } else if (strcmp(node->name, GAIN_MIN_RAMP_MS) == 0) {
6655            gain->mGain.min_ramp_ms = atoi((char *)node->value);
6656        } else if (strcmp(node->name, GAIN_MAX_RAMP_MS) == 0) {
6657            gain->mGain.max_ramp_ms = atoi((char *)node->value);
6658        }
6659        node = node->next;
6660    }
6661
6662    ALOGV("loadGain() adding new gain mode %08x channel mask %08x min mB %d max mB %d",
6663          gain->mGain.mode, gain->mGain.channel_mask, gain->mGain.min_value, gain->mGain.max_value);
6664
6665    if (gain->mGain.mode == 0) {
6666        return;
6667    }
6668    mGains.add(gain);
6669}
6670
6671void AudioPolicyManager::AudioPort::loadGains(cnode *root)
6672{
6673    cnode *node = root->first_child;
6674    int index = 0;
6675    while (node) {
6676        ALOGV("loadGains() loading gain %s", node->name);
6677        loadGain(node, index++);
6678        node = node->next;
6679    }
6680}
6681
6682status_t AudioPolicyManager::AudioPort::checkExactSamplingRate(uint32_t samplingRate) const
6683{
6684    if (mSamplingRates.isEmpty()) {
6685        return NO_ERROR;
6686    }
6687
6688    for (size_t i = 0; i < mSamplingRates.size(); i ++) {
6689        if (mSamplingRates[i] == samplingRate) {
6690            return NO_ERROR;
6691        }
6692    }
6693    return BAD_VALUE;
6694}
6695
6696status_t AudioPolicyManager::AudioPort::checkCompatibleSamplingRate(uint32_t samplingRate,
6697        uint32_t *updatedSamplingRate) const
6698{
6699    if (mSamplingRates.isEmpty()) {
6700        return NO_ERROR;
6701    }
6702
6703    // Search for the closest supported sampling rate that is above (preferred)
6704    // or below (acceptable) the desired sampling rate, within a permitted ratio.
6705    // The sampling rates do not need to be sorted in ascending order.
6706    ssize_t maxBelow = -1;
6707    ssize_t minAbove = -1;
6708    uint32_t candidate;
6709    for (size_t i = 0; i < mSamplingRates.size(); i++) {
6710        candidate = mSamplingRates[i];
6711        if (candidate == samplingRate) {
6712            if (updatedSamplingRate != NULL) {
6713                *updatedSamplingRate = candidate;
6714            }
6715            return NO_ERROR;
6716        }
6717        // candidate < desired
6718        if (candidate < samplingRate) {
6719            if (maxBelow < 0 || candidate > mSamplingRates[maxBelow]) {
6720                maxBelow = i;
6721            }
6722        // candidate > desired
6723        } else {
6724            if (minAbove < 0 || candidate < mSamplingRates[minAbove]) {
6725                minAbove = i;
6726            }
6727        }
6728    }
6729    // This uses hard-coded knowledge about AudioFlinger resampling ratios.
6730    // TODO Move these assumptions out.
6731    static const uint32_t kMaxDownSampleRatio = 6;  // beyond this aliasing occurs
6732    static const uint32_t kMaxUpSampleRatio = 256;  // beyond this sample rate inaccuracies occur
6733                                                    // due to approximation by an int32_t of the
6734                                                    // phase increments
6735    // Prefer to down-sample from a higher sampling rate, as we get the desired frequency spectrum.
6736    if (minAbove >= 0) {
6737        candidate = mSamplingRates[minAbove];
6738        if (candidate / kMaxDownSampleRatio <= samplingRate) {
6739            if (updatedSamplingRate != NULL) {
6740                *updatedSamplingRate = candidate;
6741            }
6742            return NO_ERROR;
6743        }
6744    }
6745    // But if we have to up-sample from a lower sampling rate, that's OK.
6746    if (maxBelow >= 0) {
6747        candidate = mSamplingRates[maxBelow];
6748        if (candidate * kMaxUpSampleRatio >= samplingRate) {
6749            if (updatedSamplingRate != NULL) {
6750                *updatedSamplingRate = candidate;
6751            }
6752            return NO_ERROR;
6753        }
6754    }
6755    // leave updatedSamplingRate unmodified
6756    return BAD_VALUE;
6757}
6758
6759status_t AudioPolicyManager::AudioPort::checkExactChannelMask(audio_channel_mask_t channelMask) const
6760{
6761    if (mChannelMasks.isEmpty()) {
6762        return NO_ERROR;
6763    }
6764
6765    for (size_t i = 0; i < mChannelMasks.size(); i++) {
6766        if (mChannelMasks[i] == channelMask) {
6767            return NO_ERROR;
6768        }
6769    }
6770    return BAD_VALUE;
6771}
6772
6773status_t AudioPolicyManager::AudioPort::checkCompatibleChannelMask(audio_channel_mask_t channelMask)
6774        const
6775{
6776    if (mChannelMasks.isEmpty()) {
6777        return NO_ERROR;
6778    }
6779
6780    const bool isRecordThread = mType == AUDIO_PORT_TYPE_MIX && mRole == AUDIO_PORT_ROLE_SINK;
6781    for (size_t i = 0; i < mChannelMasks.size(); i ++) {
6782        // FIXME Does not handle multi-channel automatic conversions yet
6783        audio_channel_mask_t supported = mChannelMasks[i];
6784        if (supported == channelMask) {
6785            return NO_ERROR;
6786        }
6787        if (isRecordThread) {
6788            // This uses hard-coded knowledge that AudioFlinger can silently down-mix and up-mix.
6789            // FIXME Abstract this out to a table.
6790            if (((supported == AUDIO_CHANNEL_IN_FRONT_BACK || supported == AUDIO_CHANNEL_IN_STEREO)
6791                    && channelMask == AUDIO_CHANNEL_IN_MONO) ||
6792                (supported == AUDIO_CHANNEL_IN_MONO && (channelMask == AUDIO_CHANNEL_IN_FRONT_BACK
6793                    || channelMask == AUDIO_CHANNEL_IN_STEREO))) {
6794                return NO_ERROR;
6795            }
6796        }
6797    }
6798    return BAD_VALUE;
6799}
6800
6801status_t AudioPolicyManager::AudioPort::checkFormat(audio_format_t format) const
6802{
6803    if (mFormats.isEmpty()) {
6804        return NO_ERROR;
6805    }
6806
6807    for (size_t i = 0; i < mFormats.size(); i ++) {
6808        if (mFormats[i] == format) {
6809            return NO_ERROR;
6810        }
6811    }
6812    return BAD_VALUE;
6813}
6814
6815
6816uint32_t AudioPolicyManager::AudioPort::pickSamplingRate() const
6817{
6818    // special case for uninitialized dynamic profile
6819    if (mSamplingRates.size() == 1 && mSamplingRates[0] == 0) {
6820        return 0;
6821    }
6822
6823    // For direct outputs, pick minimum sampling rate: this helps ensuring that the
6824    // channel count / sampling rate combination chosen will be supported by the connected
6825    // sink
6826    if ((mType == AUDIO_PORT_TYPE_MIX) && (mRole == AUDIO_PORT_ROLE_SOURCE) &&
6827            (mFlags & (AUDIO_OUTPUT_FLAG_DIRECT | AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD))) {
6828        uint32_t samplingRate = UINT_MAX;
6829        for (size_t i = 0; i < mSamplingRates.size(); i ++) {
6830            if ((mSamplingRates[i] < samplingRate) && (mSamplingRates[i] > 0)) {
6831                samplingRate = mSamplingRates[i];
6832            }
6833        }
6834        return (samplingRate == UINT_MAX) ? 0 : samplingRate;
6835    }
6836
6837    uint32_t samplingRate = 0;
6838    uint32_t maxRate = MAX_MIXER_SAMPLING_RATE;
6839
6840    // For mixed output and inputs, use max mixer sampling rates. Do not
6841    // limit sampling rate otherwise
6842    if (mType != AUDIO_PORT_TYPE_MIX) {
6843        maxRate = UINT_MAX;
6844    }
6845    for (size_t i = 0; i < mSamplingRates.size(); i ++) {
6846        if ((mSamplingRates[i] > samplingRate) && (mSamplingRates[i] <= maxRate)) {
6847            samplingRate = mSamplingRates[i];
6848        }
6849    }
6850    return samplingRate;
6851}
6852
6853audio_channel_mask_t AudioPolicyManager::AudioPort::pickChannelMask() const
6854{
6855    // special case for uninitialized dynamic profile
6856    if (mChannelMasks.size() == 1 && mChannelMasks[0] == 0) {
6857        return AUDIO_CHANNEL_NONE;
6858    }
6859    audio_channel_mask_t channelMask = AUDIO_CHANNEL_NONE;
6860
6861    // For direct outputs, pick minimum channel count: this helps ensuring that the
6862    // channel count / sampling rate combination chosen will be supported by the connected
6863    // sink
6864    if ((mType == AUDIO_PORT_TYPE_MIX) && (mRole == AUDIO_PORT_ROLE_SOURCE) &&
6865            (mFlags & (AUDIO_OUTPUT_FLAG_DIRECT | AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD))) {
6866        uint32_t channelCount = UINT_MAX;
6867        for (size_t i = 0; i < mChannelMasks.size(); i ++) {
6868            uint32_t cnlCount;
6869            if (mUseInChannelMask) {
6870                cnlCount = audio_channel_count_from_in_mask(mChannelMasks[i]);
6871            } else {
6872                cnlCount = audio_channel_count_from_out_mask(mChannelMasks[i]);
6873            }
6874            if ((cnlCount < channelCount) && (cnlCount > 0)) {
6875                channelMask = mChannelMasks[i];
6876                channelCount = cnlCount;
6877            }
6878        }
6879        return channelMask;
6880    }
6881
6882    uint32_t channelCount = 0;
6883    uint32_t maxCount = MAX_MIXER_CHANNEL_COUNT;
6884
6885    // For mixed output and inputs, use max mixer channel count. Do not
6886    // limit channel count otherwise
6887    if (mType != AUDIO_PORT_TYPE_MIX) {
6888        maxCount = UINT_MAX;
6889    }
6890    for (size_t i = 0; i < mChannelMasks.size(); i ++) {
6891        uint32_t cnlCount;
6892        if (mUseInChannelMask) {
6893            cnlCount = audio_channel_count_from_in_mask(mChannelMasks[i]);
6894        } else {
6895            cnlCount = audio_channel_count_from_out_mask(mChannelMasks[i]);
6896        }
6897        if ((cnlCount > channelCount) && (cnlCount <= maxCount)) {
6898            channelMask = mChannelMasks[i];
6899            channelCount = cnlCount;
6900        }
6901    }
6902    return channelMask;
6903}
6904
6905/* format in order of increasing preference */
6906const audio_format_t AudioPolicyManager::AudioPort::sPcmFormatCompareTable[] = {
6907        AUDIO_FORMAT_DEFAULT,
6908        AUDIO_FORMAT_PCM_16_BIT,
6909        AUDIO_FORMAT_PCM_8_24_BIT,
6910        AUDIO_FORMAT_PCM_24_BIT_PACKED,
6911        AUDIO_FORMAT_PCM_32_BIT,
6912        AUDIO_FORMAT_PCM_FLOAT,
6913};
6914
6915int AudioPolicyManager::AudioPort::compareFormats(audio_format_t format1,
6916                                                  audio_format_t format2)
6917{
6918    // NOTE: AUDIO_FORMAT_INVALID is also considered not PCM and will be compared equal to any
6919    // compressed format and better than any PCM format. This is by design of pickFormat()
6920    if (!audio_is_linear_pcm(format1)) {
6921        if (!audio_is_linear_pcm(format2)) {
6922            return 0;
6923        }
6924        return 1;
6925    }
6926    if (!audio_is_linear_pcm(format2)) {
6927        return -1;
6928    }
6929
6930    int index1 = -1, index2 = -1;
6931    for (size_t i = 0;
6932            (i < ARRAY_SIZE(sPcmFormatCompareTable)) && ((index1 == -1) || (index2 == -1));
6933            i ++) {
6934        if (sPcmFormatCompareTable[i] == format1) {
6935            index1 = i;
6936        }
6937        if (sPcmFormatCompareTable[i] == format2) {
6938            index2 = i;
6939        }
6940    }
6941    // format1 not found => index1 < 0 => format2 > format1
6942    // format2 not found => index2 < 0 => format2 < format1
6943    return index1 - index2;
6944}
6945
6946audio_format_t AudioPolicyManager::AudioPort::pickFormat() const
6947{
6948    // special case for uninitialized dynamic profile
6949    if (mFormats.size() == 1 && mFormats[0] == 0) {
6950        return AUDIO_FORMAT_DEFAULT;
6951    }
6952
6953    audio_format_t format = AUDIO_FORMAT_DEFAULT;
6954    audio_format_t bestFormat =
6955            AudioPolicyManager::AudioPort::sPcmFormatCompareTable[
6956                ARRAY_SIZE(AudioPolicyManager::AudioPort::sPcmFormatCompareTable) - 1];
6957    // For mixed output and inputs, use best mixer output format. Do not
6958    // limit format otherwise
6959    if ((mType != AUDIO_PORT_TYPE_MIX) ||
6960            ((mRole == AUDIO_PORT_ROLE_SOURCE) &&
6961             (((mFlags & (AUDIO_OUTPUT_FLAG_DIRECT | AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD)) != 0)))) {
6962        bestFormat = AUDIO_FORMAT_INVALID;
6963    }
6964
6965    for (size_t i = 0; i < mFormats.size(); i ++) {
6966        if ((compareFormats(mFormats[i], format) > 0) &&
6967                (compareFormats(mFormats[i], bestFormat) <= 0)) {
6968            format = mFormats[i];
6969        }
6970    }
6971    return format;
6972}
6973
6974status_t AudioPolicyManager::AudioPort::checkGain(const struct audio_gain_config *gainConfig,
6975                                                  int index) const
6976{
6977    if (index < 0 || (size_t)index >= mGains.size()) {
6978        return BAD_VALUE;
6979    }
6980    return mGains[index]->checkConfig(gainConfig);
6981}
6982
6983void AudioPolicyManager::AudioPort::dump(int fd, int spaces) const
6984{
6985    const size_t SIZE = 256;
6986    char buffer[SIZE];
6987    String8 result;
6988
6989    if (mName.size() != 0) {
6990        snprintf(buffer, SIZE, "%*s- name: %s\n", spaces, "", mName.string());
6991        result.append(buffer);
6992    }
6993
6994    if (mSamplingRates.size() != 0) {
6995        snprintf(buffer, SIZE, "%*s- sampling rates: ", spaces, "");
6996        result.append(buffer);
6997        for (size_t i = 0; i < mSamplingRates.size(); i++) {
6998            if (i == 0 && mSamplingRates[i] == 0) {
6999                snprintf(buffer, SIZE, "Dynamic");
7000            } else {
7001                snprintf(buffer, SIZE, "%d", mSamplingRates[i]);
7002            }
7003            result.append(buffer);
7004            result.append(i == (mSamplingRates.size() - 1) ? "" : ", ");
7005        }
7006        result.append("\n");
7007    }
7008
7009    if (mChannelMasks.size() != 0) {
7010        snprintf(buffer, SIZE, "%*s- channel masks: ", spaces, "");
7011        result.append(buffer);
7012        for (size_t i = 0; i < mChannelMasks.size(); i++) {
7013            ALOGV("AudioPort::dump mChannelMasks %zu %08x", i, mChannelMasks[i]);
7014
7015            if (i == 0 && mChannelMasks[i] == 0) {
7016                snprintf(buffer, SIZE, "Dynamic");
7017            } else {
7018                snprintf(buffer, SIZE, "0x%04x", mChannelMasks[i]);
7019            }
7020            result.append(buffer);
7021            result.append(i == (mChannelMasks.size() - 1) ? "" : ", ");
7022        }
7023        result.append("\n");
7024    }
7025
7026    if (mFormats.size() != 0) {
7027        snprintf(buffer, SIZE, "%*s- formats: ", spaces, "");
7028        result.append(buffer);
7029        for (size_t i = 0; i < mFormats.size(); i++) {
7030            const char *formatStr = enumToString(sFormatNameToEnumTable,
7031                                                 ARRAY_SIZE(sFormatNameToEnumTable),
7032                                                 mFormats[i]);
7033            if (i == 0 && strcmp(formatStr, "") == 0) {
7034                snprintf(buffer, SIZE, "Dynamic");
7035            } else {
7036                snprintf(buffer, SIZE, "%s", formatStr);
7037            }
7038            result.append(buffer);
7039            result.append(i == (mFormats.size() - 1) ? "" : ", ");
7040        }
7041        result.append("\n");
7042    }
7043    write(fd, result.string(), result.size());
7044    if (mGains.size() != 0) {
7045        snprintf(buffer, SIZE, "%*s- gains:\n", spaces, "");
7046        write(fd, buffer, strlen(buffer) + 1);
7047        result.append(buffer);
7048        for (size_t i = 0; i < mGains.size(); i++) {
7049            mGains[i]->dump(fd, spaces + 2, i);
7050        }
7051    }
7052}
7053
7054// --- AudioGain class implementation
7055
7056AudioPolicyManager::AudioGain::AudioGain(int index, bool useInChannelMask)
7057{
7058    mIndex = index;
7059    mUseInChannelMask = useInChannelMask;
7060    memset(&mGain, 0, sizeof(struct audio_gain));
7061}
7062
7063void AudioPolicyManager::AudioGain::getDefaultConfig(struct audio_gain_config *config)
7064{
7065    config->index = mIndex;
7066    config->mode = mGain.mode;
7067    config->channel_mask = mGain.channel_mask;
7068    if ((mGain.mode & AUDIO_GAIN_MODE_JOINT) == AUDIO_GAIN_MODE_JOINT) {
7069        config->values[0] = mGain.default_value;
7070    } else {
7071        uint32_t numValues;
7072        if (mUseInChannelMask) {
7073            numValues = audio_channel_count_from_in_mask(mGain.channel_mask);
7074        } else {
7075            numValues = audio_channel_count_from_out_mask(mGain.channel_mask);
7076        }
7077        for (size_t i = 0; i < numValues; i++) {
7078            config->values[i] = mGain.default_value;
7079        }
7080    }
7081    if ((mGain.mode & AUDIO_GAIN_MODE_RAMP) == AUDIO_GAIN_MODE_RAMP) {
7082        config->ramp_duration_ms = mGain.min_ramp_ms;
7083    }
7084}
7085
7086status_t AudioPolicyManager::AudioGain::checkConfig(const struct audio_gain_config *config)
7087{
7088    if ((config->mode & ~mGain.mode) != 0) {
7089        return BAD_VALUE;
7090    }
7091    if ((config->mode & AUDIO_GAIN_MODE_JOINT) == AUDIO_GAIN_MODE_JOINT) {
7092        if ((config->values[0] < mGain.min_value) ||
7093                    (config->values[0] > mGain.max_value)) {
7094            return BAD_VALUE;
7095        }
7096    } else {
7097        if ((config->channel_mask & ~mGain.channel_mask) != 0) {
7098            return BAD_VALUE;
7099        }
7100        uint32_t numValues;
7101        if (mUseInChannelMask) {
7102            numValues = audio_channel_count_from_in_mask(config->channel_mask);
7103        } else {
7104            numValues = audio_channel_count_from_out_mask(config->channel_mask);
7105        }
7106        for (size_t i = 0; i < numValues; i++) {
7107            if ((config->values[i] < mGain.min_value) ||
7108                    (config->values[i] > mGain.max_value)) {
7109                return BAD_VALUE;
7110            }
7111        }
7112    }
7113    if ((config->mode & AUDIO_GAIN_MODE_RAMP) == AUDIO_GAIN_MODE_RAMP) {
7114        if ((config->ramp_duration_ms < mGain.min_ramp_ms) ||
7115                    (config->ramp_duration_ms > mGain.max_ramp_ms)) {
7116            return BAD_VALUE;
7117        }
7118    }
7119    return NO_ERROR;
7120}
7121
7122void AudioPolicyManager::AudioGain::dump(int fd, int spaces, int index) const
7123{
7124    const size_t SIZE = 256;
7125    char buffer[SIZE];
7126    String8 result;
7127
7128    snprintf(buffer, SIZE, "%*sGain %d:\n", spaces, "", index+1);
7129    result.append(buffer);
7130    snprintf(buffer, SIZE, "%*s- mode: %08x\n", spaces, "", mGain.mode);
7131    result.append(buffer);
7132    snprintf(buffer, SIZE, "%*s- channel_mask: %08x\n", spaces, "", mGain.channel_mask);
7133    result.append(buffer);
7134    snprintf(buffer, SIZE, "%*s- min_value: %d mB\n", spaces, "", mGain.min_value);
7135    result.append(buffer);
7136    snprintf(buffer, SIZE, "%*s- max_value: %d mB\n", spaces, "", mGain.max_value);
7137    result.append(buffer);
7138    snprintf(buffer, SIZE, "%*s- default_value: %d mB\n", spaces, "", mGain.default_value);
7139    result.append(buffer);
7140    snprintf(buffer, SIZE, "%*s- step_value: %d mB\n", spaces, "", mGain.step_value);
7141    result.append(buffer);
7142    snprintf(buffer, SIZE, "%*s- min_ramp_ms: %d ms\n", spaces, "", mGain.min_ramp_ms);
7143    result.append(buffer);
7144    snprintf(buffer, SIZE, "%*s- max_ramp_ms: %d ms\n", spaces, "", mGain.max_ramp_ms);
7145    result.append(buffer);
7146
7147    write(fd, result.string(), result.size());
7148}
7149
7150// --- AudioPortConfig class implementation
7151
7152AudioPolicyManager::AudioPortConfig::AudioPortConfig()
7153{
7154    mSamplingRate = 0;
7155    mChannelMask = AUDIO_CHANNEL_NONE;
7156    mFormat = AUDIO_FORMAT_INVALID;
7157    mGain.index = -1;
7158}
7159
7160status_t AudioPolicyManager::AudioPortConfig::applyAudioPortConfig(
7161                                                        const struct audio_port_config *config,
7162                                                        struct audio_port_config *backupConfig)
7163{
7164    struct audio_port_config localBackupConfig;
7165    status_t status = NO_ERROR;
7166
7167    localBackupConfig.config_mask = config->config_mask;
7168    toAudioPortConfig(&localBackupConfig);
7169
7170    sp<AudioPort> audioport = getAudioPort();
7171    if (audioport == 0) {
7172        status = NO_INIT;
7173        goto exit;
7174    }
7175    if (config->config_mask & AUDIO_PORT_CONFIG_SAMPLE_RATE) {
7176        status = audioport->checkExactSamplingRate(config->sample_rate);
7177        if (status != NO_ERROR) {
7178            goto exit;
7179        }
7180        mSamplingRate = config->sample_rate;
7181    }
7182    if (config->config_mask & AUDIO_PORT_CONFIG_CHANNEL_MASK) {
7183        status = audioport->checkExactChannelMask(config->channel_mask);
7184        if (status != NO_ERROR) {
7185            goto exit;
7186        }
7187        mChannelMask = config->channel_mask;
7188    }
7189    if (config->config_mask & AUDIO_PORT_CONFIG_FORMAT) {
7190        status = audioport->checkFormat(config->format);
7191        if (status != NO_ERROR) {
7192            goto exit;
7193        }
7194        mFormat = config->format;
7195    }
7196    if (config->config_mask & AUDIO_PORT_CONFIG_GAIN) {
7197        status = audioport->checkGain(&config->gain, config->gain.index);
7198        if (status != NO_ERROR) {
7199            goto exit;
7200        }
7201        mGain = config->gain;
7202    }
7203
7204exit:
7205    if (status != NO_ERROR) {
7206        applyAudioPortConfig(&localBackupConfig);
7207    }
7208    if (backupConfig != NULL) {
7209        *backupConfig = localBackupConfig;
7210    }
7211    return status;
7212}
7213
7214void AudioPolicyManager::AudioPortConfig::toAudioPortConfig(
7215                                                    struct audio_port_config *dstConfig,
7216                                                    const struct audio_port_config *srcConfig) const
7217{
7218    if (dstConfig->config_mask & AUDIO_PORT_CONFIG_SAMPLE_RATE) {
7219        dstConfig->sample_rate = mSamplingRate;
7220        if ((srcConfig != NULL) && (srcConfig->config_mask & AUDIO_PORT_CONFIG_SAMPLE_RATE)) {
7221            dstConfig->sample_rate = srcConfig->sample_rate;
7222        }
7223    } else {
7224        dstConfig->sample_rate = 0;
7225    }
7226    if (dstConfig->config_mask & AUDIO_PORT_CONFIG_CHANNEL_MASK) {
7227        dstConfig->channel_mask = mChannelMask;
7228        if ((srcConfig != NULL) && (srcConfig->config_mask & AUDIO_PORT_CONFIG_CHANNEL_MASK)) {
7229            dstConfig->channel_mask = srcConfig->channel_mask;
7230        }
7231    } else {
7232        dstConfig->channel_mask = AUDIO_CHANNEL_NONE;
7233    }
7234    if (dstConfig->config_mask & AUDIO_PORT_CONFIG_FORMAT) {
7235        dstConfig->format = mFormat;
7236        if ((srcConfig != NULL) && (srcConfig->config_mask & AUDIO_PORT_CONFIG_FORMAT)) {
7237            dstConfig->format = srcConfig->format;
7238        }
7239    } else {
7240        dstConfig->format = AUDIO_FORMAT_INVALID;
7241    }
7242    if (dstConfig->config_mask & AUDIO_PORT_CONFIG_GAIN) {
7243        dstConfig->gain = mGain;
7244        if ((srcConfig != NULL) && (srcConfig->config_mask & AUDIO_PORT_CONFIG_GAIN)) {
7245            dstConfig->gain = srcConfig->gain;
7246        }
7247    } else {
7248        dstConfig->gain.index = -1;
7249    }
7250    if (dstConfig->gain.index != -1) {
7251        dstConfig->config_mask |= AUDIO_PORT_CONFIG_GAIN;
7252    } else {
7253        dstConfig->config_mask &= ~AUDIO_PORT_CONFIG_GAIN;
7254    }
7255}
7256
7257// --- IOProfile class implementation
7258
7259AudioPolicyManager::IOProfile::IOProfile(const String8& name, audio_port_role_t role,
7260                                         const sp<HwModule>& module)
7261    : AudioPort(name, AUDIO_PORT_TYPE_MIX, role, module)
7262{
7263}
7264
7265AudioPolicyManager::IOProfile::~IOProfile()
7266{
7267}
7268
7269// checks if the IO profile is compatible with specified parameters.
7270// Sampling rate, format and channel mask must be specified in order to
7271// get a valid a match
7272bool AudioPolicyManager::IOProfile::isCompatibleProfile(audio_devices_t device,
7273                                                        String8 address,
7274                                                        uint32_t samplingRate,
7275                                                        uint32_t *updatedSamplingRate,
7276                                                        audio_format_t format,
7277                                                        audio_channel_mask_t channelMask,
7278                                                        uint32_t flags) const
7279{
7280    const bool isPlaybackThread = mType == AUDIO_PORT_TYPE_MIX && mRole == AUDIO_PORT_ROLE_SOURCE;
7281    const bool isRecordThread = mType == AUDIO_PORT_TYPE_MIX && mRole == AUDIO_PORT_ROLE_SINK;
7282    ALOG_ASSERT(isPlaybackThread != isRecordThread);
7283
7284    if (device != AUDIO_DEVICE_NONE && mSupportedDevices.getDevice(device, address) == 0) {
7285        return false;
7286    }
7287
7288    if (samplingRate == 0) {
7289         return false;
7290    }
7291    uint32_t myUpdatedSamplingRate = samplingRate;
7292    if (isPlaybackThread && checkExactSamplingRate(samplingRate) != NO_ERROR) {
7293         return false;
7294    }
7295    if (isRecordThread && checkCompatibleSamplingRate(samplingRate, &myUpdatedSamplingRate) !=
7296            NO_ERROR) {
7297         return false;
7298    }
7299
7300    if (!audio_is_valid_format(format) || checkFormat(format) != NO_ERROR) {
7301        return false;
7302    }
7303
7304    if (isPlaybackThread && (!audio_is_output_channel(channelMask) ||
7305            checkExactChannelMask(channelMask) != NO_ERROR)) {
7306        return false;
7307    }
7308    if (isRecordThread && (!audio_is_input_channel(channelMask) ||
7309            checkCompatibleChannelMask(channelMask) != NO_ERROR)) {
7310        return false;
7311    }
7312
7313    if (isPlaybackThread && (mFlags & flags) != flags) {
7314        return false;
7315    }
7316    // The only input flag that is allowed to be different is the fast flag.
7317    // An existing fast stream is compatible with a normal track request.
7318    // An existing normal stream is compatible with a fast track request,
7319    // but the fast request will be denied by AudioFlinger and converted to normal track.
7320    if (isRecordThread && ((mFlags ^ flags) &
7321            ~AUDIO_INPUT_FLAG_FAST)) {
7322        return false;
7323    }
7324
7325    if (updatedSamplingRate != NULL) {
7326        *updatedSamplingRate = myUpdatedSamplingRate;
7327    }
7328    return true;
7329}
7330
7331void AudioPolicyManager::IOProfile::dump(int fd)
7332{
7333    const size_t SIZE = 256;
7334    char buffer[SIZE];
7335    String8 result;
7336
7337    AudioPort::dump(fd, 4);
7338
7339    snprintf(buffer, SIZE, "    - flags: 0x%04x\n", mFlags);
7340    result.append(buffer);
7341    snprintf(buffer, SIZE, "    - devices:\n");
7342    result.append(buffer);
7343    write(fd, result.string(), result.size());
7344    for (size_t i = 0; i < mSupportedDevices.size(); i++) {
7345        mSupportedDevices[i]->dump(fd, 6, i);
7346    }
7347}
7348
7349void AudioPolicyManager::IOProfile::log()
7350{
7351    const size_t SIZE = 256;
7352    char buffer[SIZE];
7353    String8 result;
7354
7355    ALOGV("    - sampling rates: ");
7356    for (size_t i = 0; i < mSamplingRates.size(); i++) {
7357        ALOGV("  %d", mSamplingRates[i]);
7358    }
7359
7360    ALOGV("    - channel masks: ");
7361    for (size_t i = 0; i < mChannelMasks.size(); i++) {
7362        ALOGV("  0x%04x", mChannelMasks[i]);
7363    }
7364
7365    ALOGV("    - formats: ");
7366    for (size_t i = 0; i < mFormats.size(); i++) {
7367        ALOGV("  0x%08x", mFormats[i]);
7368    }
7369
7370    ALOGV("    - devices: 0x%04x\n", mSupportedDevices.types());
7371    ALOGV("    - flags: 0x%04x\n", mFlags);
7372}
7373
7374
7375// --- DeviceDescriptor implementation
7376
7377
7378AudioPolicyManager::DeviceDescriptor::DeviceDescriptor(const String8& name, audio_devices_t type) :
7379                     AudioPort(name, AUDIO_PORT_TYPE_DEVICE,
7380                               audio_is_output_device(type) ? AUDIO_PORT_ROLE_SINK :
7381                                                              AUDIO_PORT_ROLE_SOURCE,
7382                             NULL),
7383                     mDeviceType(type), mAddress(""), mId(0)
7384{
7385    if (mGains.size() > 0) {
7386        mGains[0]->getDefaultConfig(&mGain);
7387    }
7388}
7389
7390bool AudioPolicyManager::DeviceDescriptor::equals(const sp<DeviceDescriptor>& other) const
7391{
7392    // Devices are considered equal if they:
7393    // - are of the same type (a device type cannot be AUDIO_DEVICE_NONE)
7394    // - have the same address or one device does not specify the address
7395    // - have the same channel mask or one device does not specify the channel mask
7396    return (mDeviceType == other->mDeviceType) &&
7397           (mAddress == "" || other->mAddress == "" || mAddress == other->mAddress) &&
7398           (mChannelMask == 0 || other->mChannelMask == 0 ||
7399                mChannelMask == other->mChannelMask);
7400}
7401
7402void AudioPolicyManager::DeviceVector::refreshTypes()
7403{
7404    mDeviceTypes = AUDIO_DEVICE_NONE;
7405    for(size_t i = 0; i < size(); i++) {
7406        mDeviceTypes |= itemAt(i)->mDeviceType;
7407    }
7408    ALOGV("DeviceVector::refreshTypes() mDeviceTypes %08x", mDeviceTypes);
7409}
7410
7411ssize_t AudioPolicyManager::DeviceVector::indexOf(const sp<DeviceDescriptor>& item) const
7412{
7413    for(size_t i = 0; i < size(); i++) {
7414        if (item->equals(itemAt(i))) {
7415            return i;
7416        }
7417    }
7418    return -1;
7419}
7420
7421ssize_t AudioPolicyManager::DeviceVector::add(const sp<DeviceDescriptor>& item)
7422{
7423    ssize_t ret = indexOf(item);
7424
7425    if (ret < 0) {
7426        ret = SortedVector::add(item);
7427        if (ret >= 0) {
7428            refreshTypes();
7429        }
7430    } else {
7431        ALOGW("DeviceVector::add device %08x already in", item->mDeviceType);
7432        ret = -1;
7433    }
7434    return ret;
7435}
7436
7437ssize_t AudioPolicyManager::DeviceVector::remove(const sp<DeviceDescriptor>& item)
7438{
7439    size_t i;
7440    ssize_t ret = indexOf(item);
7441
7442    if (ret < 0) {
7443        ALOGW("DeviceVector::remove device %08x not in", item->mDeviceType);
7444    } else {
7445        ret = SortedVector::removeAt(ret);
7446        if (ret >= 0) {
7447            refreshTypes();
7448        }
7449    }
7450    return ret;
7451}
7452
7453void AudioPolicyManager::DeviceVector::loadDevicesFromType(audio_devices_t types)
7454{
7455    DeviceVector deviceList;
7456
7457    uint32_t role_bit = AUDIO_DEVICE_BIT_IN & types;
7458    types &= ~role_bit;
7459
7460    while (types) {
7461        uint32_t i = 31 - __builtin_clz(types);
7462        uint32_t type = 1 << i;
7463        types &= ~type;
7464        add(new DeviceDescriptor(String8(""), type | role_bit));
7465    }
7466}
7467
7468void AudioPolicyManager::DeviceVector::loadDevicesFromName(char *name,
7469                                                           const DeviceVector& declaredDevices)
7470{
7471    char *devName = strtok(name, "|");
7472    while (devName != NULL) {
7473        if (strlen(devName) != 0) {
7474            audio_devices_t type = stringToEnum(sDeviceNameToEnumTable,
7475                                 ARRAY_SIZE(sDeviceNameToEnumTable),
7476                                 devName);
7477            if (type != AUDIO_DEVICE_NONE) {
7478                sp<DeviceDescriptor> dev = new DeviceDescriptor(String8(""), type);
7479                if (type == AUDIO_DEVICE_IN_REMOTE_SUBMIX ||
7480                        type == AUDIO_DEVICE_OUT_REMOTE_SUBMIX ) {
7481                    dev->mAddress = String8("0");
7482                }
7483                add(dev);
7484            } else {
7485                sp<DeviceDescriptor> deviceDesc =
7486                        declaredDevices.getDeviceFromName(String8(devName));
7487                if (deviceDesc != 0) {
7488                    add(deviceDesc);
7489                }
7490            }
7491         }
7492         devName = strtok(NULL, "|");
7493     }
7494}
7495
7496sp<AudioPolicyManager::DeviceDescriptor> AudioPolicyManager::DeviceVector::getDevice(
7497                                                        audio_devices_t type, String8 address) const
7498{
7499    sp<DeviceDescriptor> device;
7500    for (size_t i = 0; i < size(); i++) {
7501        if (itemAt(i)->mDeviceType == type) {
7502            if (address == "" || itemAt(i)->mAddress == address) {
7503                device = itemAt(i);
7504                if (itemAt(i)->mAddress == address) {
7505                    break;
7506                }
7507            }
7508        }
7509    }
7510    ALOGV("DeviceVector::getDevice() for type %08x address %s found %p",
7511          type, address.string(), device.get());
7512    return device;
7513}
7514
7515sp<AudioPolicyManager::DeviceDescriptor> AudioPolicyManager::DeviceVector::getDeviceFromId(
7516                                                                    audio_port_handle_t id) const
7517{
7518    sp<DeviceDescriptor> device;
7519    for (size_t i = 0; i < size(); i++) {
7520        ALOGV("DeviceVector::getDeviceFromId(%d) itemAt(%zu)->mId %d", id, i, itemAt(i)->mId);
7521        if (itemAt(i)->mId == id) {
7522            device = itemAt(i);
7523            break;
7524        }
7525    }
7526    return device;
7527}
7528
7529AudioPolicyManager::DeviceVector AudioPolicyManager::DeviceVector::getDevicesFromType(
7530                                                                        audio_devices_t type) const
7531{
7532    DeviceVector devices;
7533    for (size_t i = 0; (i < size()) && (type != AUDIO_DEVICE_NONE); i++) {
7534        if (itemAt(i)->mDeviceType & type & ~AUDIO_DEVICE_BIT_IN) {
7535            devices.add(itemAt(i));
7536            type &= ~itemAt(i)->mDeviceType;
7537            ALOGV("DeviceVector::getDevicesFromType() for type %x found %p",
7538                  itemAt(i)->mDeviceType, itemAt(i).get());
7539        }
7540    }
7541    return devices;
7542}
7543
7544AudioPolicyManager::DeviceVector AudioPolicyManager::DeviceVector::getDevicesFromTypeAddr(
7545        audio_devices_t type, String8 address) const
7546{
7547    DeviceVector devices;
7548    for (size_t i = 0; i < size(); i++) {
7549        if (itemAt(i)->mDeviceType == type) {
7550            if (itemAt(i)->mAddress == address) {
7551                devices.add(itemAt(i));
7552            }
7553        }
7554    }
7555    return devices;
7556}
7557
7558sp<AudioPolicyManager::DeviceDescriptor> AudioPolicyManager::DeviceVector::getDeviceFromName(
7559        const String8& name) const
7560{
7561    sp<DeviceDescriptor> device;
7562    for (size_t i = 0; i < size(); i++) {
7563        if (itemAt(i)->mName == name) {
7564            device = itemAt(i);
7565            break;
7566        }
7567    }
7568    return device;
7569}
7570
7571void AudioPolicyManager::DeviceDescriptor::toAudioPortConfig(
7572                                                    struct audio_port_config *dstConfig,
7573                                                    const struct audio_port_config *srcConfig) const
7574{
7575    dstConfig->config_mask = AUDIO_PORT_CONFIG_CHANNEL_MASK|AUDIO_PORT_CONFIG_GAIN;
7576    if (srcConfig != NULL) {
7577        dstConfig->config_mask |= srcConfig->config_mask;
7578    }
7579
7580    AudioPortConfig::toAudioPortConfig(dstConfig, srcConfig);
7581
7582    dstConfig->id = mId;
7583    dstConfig->role = audio_is_output_device(mDeviceType) ?
7584                        AUDIO_PORT_ROLE_SINK : AUDIO_PORT_ROLE_SOURCE;
7585    dstConfig->type = AUDIO_PORT_TYPE_DEVICE;
7586    dstConfig->ext.device.type = mDeviceType;
7587    dstConfig->ext.device.hw_module = mModule->mHandle;
7588    strncpy(dstConfig->ext.device.address, mAddress.string(), AUDIO_DEVICE_MAX_ADDRESS_LEN);
7589}
7590
7591void AudioPolicyManager::DeviceDescriptor::toAudioPort(struct audio_port *port) const
7592{
7593    ALOGV("DeviceDescriptor::toAudioPort() handle %d type %x", mId, mDeviceType);
7594    AudioPort::toAudioPort(port);
7595    port->id = mId;
7596    toAudioPortConfig(&port->active_config);
7597    port->ext.device.type = mDeviceType;
7598    port->ext.device.hw_module = mModule->mHandle;
7599    strncpy(port->ext.device.address, mAddress.string(), AUDIO_DEVICE_MAX_ADDRESS_LEN);
7600}
7601
7602status_t AudioPolicyManager::DeviceDescriptor::dump(int fd, int spaces, int index) const
7603{
7604    const size_t SIZE = 256;
7605    char buffer[SIZE];
7606    String8 result;
7607
7608    snprintf(buffer, SIZE, "%*sDevice %d:\n", spaces, "", index+1);
7609    result.append(buffer);
7610    if (mId != 0) {
7611        snprintf(buffer, SIZE, "%*s- id: %2d\n", spaces, "", mId);
7612        result.append(buffer);
7613    }
7614    snprintf(buffer, SIZE, "%*s- type: %-48s\n", spaces, "",
7615                                              enumToString(sDeviceNameToEnumTable,
7616                                                           ARRAY_SIZE(sDeviceNameToEnumTable),
7617                                                           mDeviceType));
7618    result.append(buffer);
7619    if (mAddress.size() != 0) {
7620        snprintf(buffer, SIZE, "%*s- address: %-32s\n", spaces, "", mAddress.string());
7621        result.append(buffer);
7622    }
7623    write(fd, result.string(), result.size());
7624    AudioPort::dump(fd, spaces);
7625
7626    return NO_ERROR;
7627}
7628
7629status_t AudioPolicyManager::AudioPatch::dump(int fd, int spaces, int index) const
7630{
7631    const size_t SIZE = 256;
7632    char buffer[SIZE];
7633    String8 result;
7634
7635
7636    snprintf(buffer, SIZE, "%*sAudio patch %d:\n", spaces, "", index+1);
7637    result.append(buffer);
7638    snprintf(buffer, SIZE, "%*s- handle: %2d\n", spaces, "", mHandle);
7639    result.append(buffer);
7640    snprintf(buffer, SIZE, "%*s- audio flinger handle: %2d\n", spaces, "", mAfPatchHandle);
7641    result.append(buffer);
7642    snprintf(buffer, SIZE, "%*s- owner uid: %2d\n", spaces, "", mUid);
7643    result.append(buffer);
7644    snprintf(buffer, SIZE, "%*s- %d sources:\n", spaces, "", mPatch.num_sources);
7645    result.append(buffer);
7646    for (size_t i = 0; i < mPatch.num_sources; i++) {
7647        if (mPatch.sources[i].type == AUDIO_PORT_TYPE_DEVICE) {
7648            snprintf(buffer, SIZE, "%*s- Device ID %d %s\n", spaces + 2, "",
7649                     mPatch.sources[i].id, enumToString(sDeviceNameToEnumTable,
7650                                                        ARRAY_SIZE(sDeviceNameToEnumTable),
7651                                                        mPatch.sources[i].ext.device.type));
7652        } else {
7653            snprintf(buffer, SIZE, "%*s- Mix ID %d I/O handle %d\n", spaces + 2, "",
7654                     mPatch.sources[i].id, mPatch.sources[i].ext.mix.handle);
7655        }
7656        result.append(buffer);
7657    }
7658    snprintf(buffer, SIZE, "%*s- %d sinks:\n", spaces, "", mPatch.num_sinks);
7659    result.append(buffer);
7660    for (size_t i = 0; i < mPatch.num_sinks; i++) {
7661        if (mPatch.sinks[i].type == AUDIO_PORT_TYPE_DEVICE) {
7662            snprintf(buffer, SIZE, "%*s- Device ID %d %s\n", spaces + 2, "",
7663                     mPatch.sinks[i].id, enumToString(sDeviceNameToEnumTable,
7664                                                        ARRAY_SIZE(sDeviceNameToEnumTable),
7665                                                        mPatch.sinks[i].ext.device.type));
7666        } else {
7667            snprintf(buffer, SIZE, "%*s- Mix ID %d I/O handle %d\n", spaces + 2, "",
7668                     mPatch.sinks[i].id, mPatch.sinks[i].ext.mix.handle);
7669        }
7670        result.append(buffer);
7671    }
7672
7673    write(fd, result.string(), result.size());
7674    return NO_ERROR;
7675}
7676
7677// --- audio_policy.conf file parsing
7678
7679uint32_t AudioPolicyManager::parseOutputFlagNames(char *name)
7680{
7681    uint32_t flag = 0;
7682
7683    // it is OK to cast name to non const here as we are not going to use it after
7684    // strtok() modifies it
7685    char *flagName = strtok(name, "|");
7686    while (flagName != NULL) {
7687        if (strlen(flagName) != 0) {
7688            flag |= stringToEnum(sOutputFlagNameToEnumTable,
7689                               ARRAY_SIZE(sOutputFlagNameToEnumTable),
7690                               flagName);
7691        }
7692        flagName = strtok(NULL, "|");
7693    }
7694    //force direct flag if offload flag is set: offloading implies a direct output stream
7695    // and all common behaviors are driven by checking only the direct flag
7696    // this should normally be set appropriately in the policy configuration file
7697    if ((flag & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) != 0) {
7698        flag |= AUDIO_OUTPUT_FLAG_DIRECT;
7699    }
7700
7701    return flag;
7702}
7703
7704uint32_t AudioPolicyManager::parseInputFlagNames(char *name)
7705{
7706    uint32_t flag = 0;
7707
7708    // it is OK to cast name to non const here as we are not going to use it after
7709    // strtok() modifies it
7710    char *flagName = strtok(name, "|");
7711    while (flagName != NULL) {
7712        if (strlen(flagName) != 0) {
7713            flag |= stringToEnum(sInputFlagNameToEnumTable,
7714                               ARRAY_SIZE(sInputFlagNameToEnumTable),
7715                               flagName);
7716        }
7717        flagName = strtok(NULL, "|");
7718    }
7719    return flag;
7720}
7721
7722audio_devices_t AudioPolicyManager::parseDeviceNames(char *name)
7723{
7724    uint32_t device = 0;
7725
7726    char *devName = strtok(name, "|");
7727    while (devName != NULL) {
7728        if (strlen(devName) != 0) {
7729            device |= stringToEnum(sDeviceNameToEnumTable,
7730                                 ARRAY_SIZE(sDeviceNameToEnumTable),
7731                                 devName);
7732         }
7733        devName = strtok(NULL, "|");
7734     }
7735    return device;
7736}
7737
7738void AudioPolicyManager::loadHwModule(cnode *root)
7739{
7740    status_t status = NAME_NOT_FOUND;
7741    cnode *node;
7742    sp<HwModule> module = new HwModule(root->name);
7743
7744    node = config_find(root, DEVICES_TAG);
7745    if (node != NULL) {
7746        node = node->first_child;
7747        while (node) {
7748            ALOGV("loadHwModule() loading device %s", node->name);
7749            status_t tmpStatus = module->loadDevice(node);
7750            if (status == NAME_NOT_FOUND || status == NO_ERROR) {
7751                status = tmpStatus;
7752            }
7753            node = node->next;
7754        }
7755    }
7756    node = config_find(root, OUTPUTS_TAG);
7757    if (node != NULL) {
7758        node = node->first_child;
7759        while (node) {
7760            ALOGV("loadHwModule() loading output %s", node->name);
7761            status_t tmpStatus = module->loadOutput(node);
7762            if (status == NAME_NOT_FOUND || status == NO_ERROR) {
7763                status = tmpStatus;
7764            }
7765            node = node->next;
7766        }
7767    }
7768    node = config_find(root, INPUTS_TAG);
7769    if (node != NULL) {
7770        node = node->first_child;
7771        while (node) {
7772            ALOGV("loadHwModule() loading input %s", node->name);
7773            status_t tmpStatus = module->loadInput(node);
7774            if (status == NAME_NOT_FOUND || status == NO_ERROR) {
7775                status = tmpStatus;
7776            }
7777            node = node->next;
7778        }
7779    }
7780    loadGlobalConfig(root, module);
7781
7782    if (status == NO_ERROR) {
7783        mHwModules.add(module);
7784    }
7785}
7786
7787void AudioPolicyManager::loadHwModules(cnode *root)
7788{
7789    cnode *node = config_find(root, AUDIO_HW_MODULE_TAG);
7790    if (node == NULL) {
7791        return;
7792    }
7793
7794    node = node->first_child;
7795    while (node) {
7796        ALOGV("loadHwModules() loading module %s", node->name);
7797        loadHwModule(node);
7798        node = node->next;
7799    }
7800}
7801
7802void AudioPolicyManager::loadGlobalConfig(cnode *root, const sp<HwModule>& module)
7803{
7804    cnode *node = config_find(root, GLOBAL_CONFIG_TAG);
7805
7806    if (node == NULL) {
7807        return;
7808    }
7809    DeviceVector declaredDevices;
7810    if (module != NULL) {
7811        declaredDevices = module->mDeclaredDevices;
7812    }
7813
7814    node = node->first_child;
7815    while (node) {
7816        if (strcmp(ATTACHED_OUTPUT_DEVICES_TAG, node->name) == 0) {
7817            mAvailableOutputDevices.loadDevicesFromName((char *)node->value,
7818                                                        declaredDevices);
7819            ALOGV("loadGlobalConfig() Attached Output Devices %08x",
7820                  mAvailableOutputDevices.types());
7821        } else if (strcmp(DEFAULT_OUTPUT_DEVICE_TAG, node->name) == 0) {
7822            audio_devices_t device = (audio_devices_t)stringToEnum(sDeviceNameToEnumTable,
7823                                              ARRAY_SIZE(sDeviceNameToEnumTable),
7824                                              (char *)node->value);
7825            if (device != AUDIO_DEVICE_NONE) {
7826                mDefaultOutputDevice = new DeviceDescriptor(String8(""), device);
7827            } else {
7828                ALOGW("loadGlobalConfig() default device not specified");
7829            }
7830            ALOGV("loadGlobalConfig() mDefaultOutputDevice %08x", mDefaultOutputDevice->mDeviceType);
7831        } else if (strcmp(ATTACHED_INPUT_DEVICES_TAG, node->name) == 0) {
7832            mAvailableInputDevices.loadDevicesFromName((char *)node->value,
7833                                                       declaredDevices);
7834            ALOGV("loadGlobalConfig() Available InputDevices %08x", mAvailableInputDevices.types());
7835        } else if (strcmp(SPEAKER_DRC_ENABLED_TAG, node->name) == 0) {
7836            mSpeakerDrcEnabled = stringToBool((char *)node->value);
7837            ALOGV("loadGlobalConfig() mSpeakerDrcEnabled = %d", mSpeakerDrcEnabled);
7838        } else if (strcmp(AUDIO_HAL_VERSION_TAG, node->name) == 0) {
7839            uint32_t major, minor;
7840            sscanf((char *)node->value, "%u.%u", &major, &minor);
7841            module->mHalVersion = HARDWARE_DEVICE_API_VERSION(major, minor);
7842            ALOGV("loadGlobalConfig() mHalVersion = %04x major %u minor %u",
7843                  module->mHalVersion, major, minor);
7844        }
7845        node = node->next;
7846    }
7847}
7848
7849status_t AudioPolicyManager::loadAudioPolicyConfig(const char *path)
7850{
7851    cnode *root;
7852    char *data;
7853
7854    data = (char *)load_file(path, NULL);
7855    if (data == NULL) {
7856        return -ENODEV;
7857    }
7858    root = config_node("", "");
7859    config_load(root, data);
7860
7861    loadHwModules(root);
7862    // legacy audio_policy.conf files have one global_configuration section
7863    loadGlobalConfig(root, getModuleFromName(AUDIO_HARDWARE_MODULE_ID_PRIMARY));
7864    config_free(root);
7865    free(root);
7866    free(data);
7867
7868    ALOGI("loadAudioPolicyConfig() loaded %s\n", path);
7869
7870    return NO_ERROR;
7871}
7872
7873void AudioPolicyManager::defaultAudioPolicyConfig(void)
7874{
7875    sp<HwModule> module;
7876    sp<IOProfile> profile;
7877    sp<DeviceDescriptor> defaultInputDevice = new DeviceDescriptor(String8(""),
7878                                                                   AUDIO_DEVICE_IN_BUILTIN_MIC);
7879    mAvailableOutputDevices.add(mDefaultOutputDevice);
7880    mAvailableInputDevices.add(defaultInputDevice);
7881
7882    module = new HwModule("primary");
7883
7884    profile = new IOProfile(String8("primary"), AUDIO_PORT_ROLE_SOURCE, module);
7885    profile->mSamplingRates.add(44100);
7886    profile->mFormats.add(AUDIO_FORMAT_PCM_16_BIT);
7887    profile->mChannelMasks.add(AUDIO_CHANNEL_OUT_STEREO);
7888    profile->mSupportedDevices.add(mDefaultOutputDevice);
7889    profile->mFlags = AUDIO_OUTPUT_FLAG_PRIMARY;
7890    module->mOutputProfiles.add(profile);
7891
7892    profile = new IOProfile(String8("primary"), AUDIO_PORT_ROLE_SINK, module);
7893    profile->mSamplingRates.add(8000);
7894    profile->mFormats.add(AUDIO_FORMAT_PCM_16_BIT);
7895    profile->mChannelMasks.add(AUDIO_CHANNEL_IN_MONO);
7896    profile->mSupportedDevices.add(defaultInputDevice);
7897    module->mInputProfiles.add(profile);
7898
7899    mHwModules.add(module);
7900}
7901
7902audio_stream_type_t AudioPolicyManager::streamTypefromAttributesInt(const audio_attributes_t *attr)
7903{
7904    // flags to stream type mapping
7905    if ((attr->flags & AUDIO_FLAG_AUDIBILITY_ENFORCED) == AUDIO_FLAG_AUDIBILITY_ENFORCED) {
7906        return AUDIO_STREAM_ENFORCED_AUDIBLE;
7907    }
7908    if ((attr->flags & AUDIO_FLAG_SCO) == AUDIO_FLAG_SCO) {
7909        return AUDIO_STREAM_BLUETOOTH_SCO;
7910    }
7911
7912    // usage to stream type mapping
7913    switch (attr->usage) {
7914    case AUDIO_USAGE_MEDIA:
7915    case AUDIO_USAGE_GAME:
7916    case AUDIO_USAGE_ASSISTANCE_NAVIGATION_GUIDANCE:
7917        return AUDIO_STREAM_MUSIC;
7918    case AUDIO_USAGE_ASSISTANCE_ACCESSIBILITY:
7919        if (isStreamActive(AUDIO_STREAM_ALARM)) {
7920            return AUDIO_STREAM_ALARM;
7921        }
7922        if (isStreamActive(AUDIO_STREAM_RING)) {
7923            return AUDIO_STREAM_RING;
7924        }
7925        if (isInCall()) {
7926            return AUDIO_STREAM_VOICE_CALL;
7927        }
7928        return AUDIO_STREAM_ACCESSIBILITY;
7929    case AUDIO_USAGE_ASSISTANCE_SONIFICATION:
7930        return AUDIO_STREAM_SYSTEM;
7931    case AUDIO_USAGE_VOICE_COMMUNICATION:
7932        return AUDIO_STREAM_VOICE_CALL;
7933
7934    case AUDIO_USAGE_VOICE_COMMUNICATION_SIGNALLING:
7935        return AUDIO_STREAM_DTMF;
7936
7937    case AUDIO_USAGE_ALARM:
7938        return AUDIO_STREAM_ALARM;
7939    case AUDIO_USAGE_NOTIFICATION_TELEPHONY_RINGTONE:
7940        return AUDIO_STREAM_RING;
7941
7942    case AUDIO_USAGE_NOTIFICATION:
7943    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_REQUEST:
7944    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_INSTANT:
7945    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_DELAYED:
7946    case AUDIO_USAGE_NOTIFICATION_EVENT:
7947        return AUDIO_STREAM_NOTIFICATION;
7948
7949    case AUDIO_USAGE_UNKNOWN:
7950    default:
7951        return AUDIO_STREAM_MUSIC;
7952    }
7953}
7954
7955bool AudioPolicyManager::isValidAttributes(const audio_attributes_t *paa) {
7956    // has flags that map to a strategy?
7957    if ((paa->flags & (AUDIO_FLAG_AUDIBILITY_ENFORCED | AUDIO_FLAG_SCO | AUDIO_FLAG_BEACON)) != 0) {
7958        return true;
7959    }
7960
7961    // has known usage?
7962    switch (paa->usage) {
7963    case AUDIO_USAGE_UNKNOWN:
7964    case AUDIO_USAGE_MEDIA:
7965    case AUDIO_USAGE_VOICE_COMMUNICATION:
7966    case AUDIO_USAGE_VOICE_COMMUNICATION_SIGNALLING:
7967    case AUDIO_USAGE_ALARM:
7968    case AUDIO_USAGE_NOTIFICATION:
7969    case AUDIO_USAGE_NOTIFICATION_TELEPHONY_RINGTONE:
7970    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_REQUEST:
7971    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_INSTANT:
7972    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_DELAYED:
7973    case AUDIO_USAGE_NOTIFICATION_EVENT:
7974    case AUDIO_USAGE_ASSISTANCE_ACCESSIBILITY:
7975    case AUDIO_USAGE_ASSISTANCE_NAVIGATION_GUIDANCE:
7976    case AUDIO_USAGE_ASSISTANCE_SONIFICATION:
7977    case AUDIO_USAGE_GAME:
7978    case AUDIO_USAGE_VIRTUAL_SOURCE:
7979        break;
7980    default:
7981        return false;
7982    }
7983    return true;
7984}
7985
7986}; // namespace android
7987