AudioPolicyManager.cpp revision 0add0fd07401c507a77b37868f46a2ae587c30df 
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
214
215status_t AudioPolicyManager::setDeviceConnectionState(audio_devices_t device,
216                                                          audio_policy_dev_state_t state,
217                                                  const char *device_address)
218{
219    String8 address = (device_address == NULL) ? String8("") : String8(device_address);
220    // handle legacy remote submix case where the address was not always specified
221    if (deviceDistinguishesOnAddress(device) && (address.length() == 0)) {
222        address = String8("0");
223    }
224
225    ALOGV("setDeviceConnectionState() device: %x, state %d, address %s",
226            device, state, address.string());
227
228    // connect/disconnect only 1 device at a time
229    if (!audio_is_output_device(device) && !audio_is_input_device(device)) return BAD_VALUE;
230
231    // handle output devices
232    if (audio_is_output_device(device)) {
233        SortedVector <audio_io_handle_t> outputs;
234
235        sp<DeviceDescriptor> devDesc = new DeviceDescriptor(String8(""), device);
236        devDesc->mAddress = address;
237        ssize_t index = mAvailableOutputDevices.indexOf(devDesc);
238
239        // save a copy of the opened output descriptors before any output is opened or closed
240        // by checkOutputsForDevice(). This will be needed by checkOutputForAllStrategies()
241        mPreviousOutputs = mOutputs;
242        switch (state)
243        {
244        // handle output device connection
245        case AUDIO_POLICY_DEVICE_STATE_AVAILABLE:
246            if (index >= 0) {
247                ALOGW("setDeviceConnectionState() device already connected: %x", device);
248                return INVALID_OPERATION;
249            }
250            ALOGV("setDeviceConnectionState() connecting device %x", device);
251
252            // register new device as available
253            index = mAvailableOutputDevices.add(devDesc);
254            if (index >= 0) {
255                sp<HwModule> module = getModuleForDevice(device);
256                if (module == 0) {
257                    ALOGD("setDeviceConnectionState() could not find HW module for device %08x",
258                          device);
259                    mAvailableOutputDevices.remove(devDesc);
260                    return INVALID_OPERATION;
261                }
262                mAvailableOutputDevices[index]->mId = nextUniqueId();
263                mAvailableOutputDevices[index]->mModule = module;
264            } else {
265                return NO_MEMORY;
266            }
267
268            if (checkOutputsForDevice(devDesc, state, outputs, address) != NO_ERROR) {
269                mAvailableOutputDevices.remove(devDesc);
270                return INVALID_OPERATION;
271            }
272            // outputs should never be empty here
273            ALOG_ASSERT(outputs.size() != 0, "setDeviceConnectionState():"
274                    "checkOutputsForDevice() returned no outputs but status OK");
275            ALOGV("setDeviceConnectionState() checkOutputsForDevice() returned %zu outputs",
276                  outputs.size());
277            break;
278        // handle output device disconnection
279        case AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE: {
280            if (index < 0) {
281                ALOGW("setDeviceConnectionState() device not connected: %x", device);
282                return INVALID_OPERATION;
283            }
284
285            ALOGV("setDeviceConnectionState() disconnecting output device %x", device);
286
287            // Set Disconnect to HALs
288            AudioParameter param = AudioParameter(address);
289            param.addInt(String8(AUDIO_PARAMETER_DEVICE_DISCONNECT), device);
290            mpClientInterface->setParameters(AUDIO_IO_HANDLE_NONE, param.toString());
291
292            // remove device from available output devices
293            mAvailableOutputDevices.remove(devDesc);
294
295            checkOutputsForDevice(devDesc, state, outputs, address);
296            } break;
297
298        default:
299            ALOGE("setDeviceConnectionState() invalid state: %x", state);
300            return BAD_VALUE;
301        }
302
303        // checkA2dpSuspend must run before checkOutputForAllStrategies so that A2DP
304        // output is suspended before any tracks are moved to it
305        checkA2dpSuspend();
306        checkOutputForAllStrategies();
307        // outputs must be closed after checkOutputForAllStrategies() is executed
308        if (!outputs.isEmpty()) {
309            for (size_t i = 0; i < outputs.size(); i++) {
310                sp<AudioOutputDescriptor> desc = mOutputs.valueFor(outputs[i]);
311                // close unused outputs after device disconnection or direct outputs that have been
312                // opened by checkOutputsForDevice() to query dynamic parameters
313                if ((state == AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE) ||
314                        (((desc->mFlags & AUDIO_OUTPUT_FLAG_DIRECT) != 0) &&
315                         (desc->mDirectOpenCount == 0))) {
316                    closeOutput(outputs[i]);
317                }
318            }
319            // check again after closing A2DP output to reset mA2dpSuspended if needed
320            checkA2dpSuspend();
321        }
322
323        updateDevicesAndOutputs();
324        if (mPhoneState == AUDIO_MODE_IN_CALL) {
325            audio_devices_t newDevice = getNewOutputDevice(mPrimaryOutput, false /*fromCache*/);
326            updateCallRouting(newDevice);
327        }
328        for (size_t i = 0; i < mOutputs.size(); i++) {
329            audio_io_handle_t output = mOutputs.keyAt(i);
330            if ((mPhoneState != AUDIO_MODE_IN_CALL) || (output != mPrimaryOutput)) {
331                audio_devices_t newDevice = getNewOutputDevice(mOutputs.keyAt(i),
332                                                               true /*fromCache*/);
333                // do not force device change on duplicated output because if device is 0, it will
334                // also force a device 0 for the two outputs it is duplicated to which may override
335                // a valid device selection on those outputs.
336                bool force = !mOutputs.valueAt(i)->isDuplicated()
337                        && (!deviceDistinguishesOnAddress(device)
338                                // always force when disconnecting (a non-duplicated device)
339                                || (state == AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE));
340                setOutputDevice(output, newDevice, force, 0);
341            }
342        }
343
344        mpClientInterface->onAudioPortListUpdate();
345        return NO_ERROR;
346    }  // end if is output device
347
348    // handle input devices
349    if (audio_is_input_device(device)) {
350        SortedVector <audio_io_handle_t> inputs;
351
352        sp<DeviceDescriptor> devDesc = new DeviceDescriptor(String8(""), device);
353        devDesc->mAddress = address;
354        ssize_t index = mAvailableInputDevices.indexOf(devDesc);
355        switch (state)
356        {
357        // handle input device connection
358        case AUDIO_POLICY_DEVICE_STATE_AVAILABLE: {
359            if (index >= 0) {
360                ALOGW("setDeviceConnectionState() device already connected: %d", device);
361                return INVALID_OPERATION;
362            }
363            sp<HwModule> module = getModuleForDevice(device);
364            if (module == NULL) {
365                ALOGW("setDeviceConnectionState(): could not find HW module for device %08x",
366                      device);
367                return INVALID_OPERATION;
368            }
369            if (checkInputsForDevice(device, state, inputs, address) != NO_ERROR) {
370                return INVALID_OPERATION;
371            }
372
373            index = mAvailableInputDevices.add(devDesc);
374            if (index >= 0) {
375                mAvailableInputDevices[index]->mId = nextUniqueId();
376                mAvailableInputDevices[index]->mModule = module;
377            } else {
378                return NO_MEMORY;
379            }
380        } break;
381
382        // handle input device disconnection
383        case AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE: {
384            if (index < 0) {
385                ALOGW("setDeviceConnectionState() device not connected: %d", device);
386                return INVALID_OPERATION;
387            }
388
389            ALOGV("setDeviceConnectionState() disconnecting input device %x", device);
390
391            // Set Disconnect to HALs
392            AudioParameter param = AudioParameter(address);
393            param.addInt(String8(AUDIO_PARAMETER_DEVICE_DISCONNECT), device);
394            mpClientInterface->setParameters(AUDIO_IO_HANDLE_NONE, param.toString());
395
396            checkInputsForDevice(device, state, inputs, address);
397            mAvailableInputDevices.remove(devDesc);
398
399        } break;
400
401        default:
402            ALOGE("setDeviceConnectionState() invalid state: %x", state);
403            return BAD_VALUE;
404        }
405
406        closeAllInputs();
407
408        if (mPhoneState == AUDIO_MODE_IN_CALL) {
409            audio_devices_t newDevice = getNewOutputDevice(mPrimaryOutput, false /*fromCache*/);
410            updateCallRouting(newDevice);
411        }
412
413        mpClientInterface->onAudioPortListUpdate();
414        return NO_ERROR;
415    } // end if is input device
416
417    ALOGW("setDeviceConnectionState() invalid device: %x", device);
418    return BAD_VALUE;
419}
420
421audio_policy_dev_state_t AudioPolicyManager::getDeviceConnectionState(audio_devices_t device,
422                                                  const char *device_address)
423{
424    audio_policy_dev_state_t state = AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE;
425    sp<DeviceDescriptor> devDesc = new DeviceDescriptor(String8(""), device);
426    devDesc->mAddress = (device_address == NULL) ? String8("") : String8(device_address);
427    // handle legacy remote submix case where the address was not always specified
428    if (deviceDistinguishesOnAddress(device) && (devDesc->mAddress.length() == 0)) {
429        devDesc->mAddress = String8("0");
430    }
431    ssize_t index;
432    DeviceVector *deviceVector;
433
434    if (audio_is_output_device(device)) {
435        deviceVector = &mAvailableOutputDevices;
436    } else if (audio_is_input_device(device)) {
437        deviceVector = &mAvailableInputDevices;
438    } else {
439        ALOGW("getDeviceConnectionState() invalid device type %08x", device);
440        return AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE;
441    }
442
443    index = deviceVector->indexOf(devDesc);
444    if (index >= 0) {
445        return AUDIO_POLICY_DEVICE_STATE_AVAILABLE;
446    } else {
447        return AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE;
448    }
449}
450
451void AudioPolicyManager::updateCallRouting(audio_devices_t rxDevice, int delayMs)
452{
453    bool createTxPatch = false;
454    struct audio_patch patch;
455    patch.num_sources = 1;
456    patch.num_sinks = 1;
457    status_t status;
458    audio_patch_handle_t afPatchHandle;
459    DeviceVector deviceList;
460
461    audio_devices_t txDevice = getDeviceForInputSource(AUDIO_SOURCE_VOICE_COMMUNICATION);
462    ALOGV("updateCallRouting device rxDevice %08x txDevice %08x", rxDevice, txDevice);
463
464    // release existing RX patch if any
465    if (mCallRxPatch != 0) {
466        mpClientInterface->releaseAudioPatch(mCallRxPatch->mAfPatchHandle, 0);
467        mCallRxPatch.clear();
468    }
469    // release TX patch if any
470    if (mCallTxPatch != 0) {
471        mpClientInterface->releaseAudioPatch(mCallTxPatch->mAfPatchHandle, 0);
472        mCallTxPatch.clear();
473    }
474
475    // If the RX device is on the primary HW module, then use legacy routing method for voice calls
476    // via setOutputDevice() on primary output.
477    // Otherwise, create two audio patches for TX and RX path.
478    if (availablePrimaryOutputDevices() & rxDevice) {
479        setOutputDevice(mPrimaryOutput, rxDevice, true, delayMs);
480        // If the TX device is also on the primary HW module, setOutputDevice() will take care
481        // of it due to legacy implementation. If not, create a patch.
482        if ((availablePrimaryInputDevices() & txDevice & ~AUDIO_DEVICE_BIT_IN)
483                == AUDIO_DEVICE_NONE) {
484            createTxPatch = true;
485        }
486    } else {
487        // create RX path audio patch
488        deviceList = mAvailableOutputDevices.getDevicesFromType(rxDevice);
489        ALOG_ASSERT(!deviceList.isEmpty(),
490                    "updateCallRouting() selected device not in output device list");
491        sp<DeviceDescriptor> rxSinkDeviceDesc = deviceList.itemAt(0);
492        deviceList = mAvailableInputDevices.getDevicesFromType(AUDIO_DEVICE_IN_TELEPHONY_RX);
493        ALOG_ASSERT(!deviceList.isEmpty(),
494                    "updateCallRouting() no telephony RX device");
495        sp<DeviceDescriptor> rxSourceDeviceDesc = deviceList.itemAt(0);
496
497        rxSourceDeviceDesc->toAudioPortConfig(&patch.sources[0]);
498        rxSinkDeviceDesc->toAudioPortConfig(&patch.sinks[0]);
499
500        // request to reuse existing output stream if one is already opened to reach the RX device
501        SortedVector<audio_io_handle_t> outputs =
502                                getOutputsForDevice(rxDevice, mOutputs);
503        audio_io_handle_t output = selectOutput(outputs,
504                                                AUDIO_OUTPUT_FLAG_NONE,
505                                                AUDIO_FORMAT_INVALID);
506        if (output != AUDIO_IO_HANDLE_NONE) {
507            sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
508            ALOG_ASSERT(!outputDesc->isDuplicated(),
509                        "updateCallRouting() RX device output is duplicated");
510            outputDesc->toAudioPortConfig(&patch.sources[1]);
511            patch.num_sources = 2;
512        }
513
514        afPatchHandle = AUDIO_PATCH_HANDLE_NONE;
515        status = mpClientInterface->createAudioPatch(&patch, &afPatchHandle, 0);
516        ALOGW_IF(status != NO_ERROR, "updateCallRouting() error %d creating RX audio patch",
517                                               status);
518        if (status == NO_ERROR) {
519            mCallRxPatch = new AudioPatch((audio_patch_handle_t)nextUniqueId(),
520                                       &patch, mUidCached);
521            mCallRxPatch->mAfPatchHandle = afPatchHandle;
522            mCallRxPatch->mUid = mUidCached;
523        }
524        createTxPatch = true;
525    }
526    if (createTxPatch) {
527
528        struct audio_patch patch;
529        patch.num_sources = 1;
530        patch.num_sinks = 1;
531        deviceList = mAvailableInputDevices.getDevicesFromType(txDevice);
532        ALOG_ASSERT(!deviceList.isEmpty(),
533                    "updateCallRouting() selected device not in input device list");
534        sp<DeviceDescriptor> txSourceDeviceDesc = deviceList.itemAt(0);
535        txSourceDeviceDesc->toAudioPortConfig(&patch.sources[0]);
536        deviceList = mAvailableOutputDevices.getDevicesFromType(AUDIO_DEVICE_OUT_TELEPHONY_TX);
537        ALOG_ASSERT(!deviceList.isEmpty(),
538                    "updateCallRouting() no telephony TX device");
539        sp<DeviceDescriptor> txSinkDeviceDesc = deviceList.itemAt(0);
540        txSinkDeviceDesc->toAudioPortConfig(&patch.sinks[0]);
541
542        SortedVector<audio_io_handle_t> outputs =
543                                getOutputsForDevice(AUDIO_DEVICE_OUT_TELEPHONY_TX, mOutputs);
544        audio_io_handle_t output = selectOutput(outputs,
545                                                AUDIO_OUTPUT_FLAG_NONE,
546                                                AUDIO_FORMAT_INVALID);
547        // request to reuse existing output stream if one is already opened to reach the TX
548        // path output device
549        if (output != AUDIO_IO_HANDLE_NONE) {
550            sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
551            ALOG_ASSERT(!outputDesc->isDuplicated(),
552                        "updateCallRouting() RX device output is duplicated");
553            outputDesc->toAudioPortConfig(&patch.sources[1]);
554            patch.num_sources = 2;
555        }
556
557        afPatchHandle = AUDIO_PATCH_HANDLE_NONE;
558        status = mpClientInterface->createAudioPatch(&patch, &afPatchHandle, 0);
559        ALOGW_IF(status != NO_ERROR, "setPhoneState() error %d creating TX audio patch",
560                                               status);
561        if (status == NO_ERROR) {
562            mCallTxPatch = new AudioPatch((audio_patch_handle_t)nextUniqueId(),
563                                       &patch, mUidCached);
564            mCallTxPatch->mAfPatchHandle = afPatchHandle;
565            mCallTxPatch->mUid = mUidCached;
566        }
567    }
568}
569
570void AudioPolicyManager::setPhoneState(audio_mode_t state)
571{
572    ALOGV("setPhoneState() state %d", state);
573    if (state < 0 || state >= AUDIO_MODE_CNT) {
574        ALOGW("setPhoneState() invalid state %d", state);
575        return;
576    }
577
578    if (state == mPhoneState ) {
579        ALOGW("setPhoneState() setting same state %d", state);
580        return;
581    }
582
583    // if leaving call state, handle special case of active streams
584    // pertaining to sonification strategy see handleIncallSonification()
585    if (isInCall()) {
586        ALOGV("setPhoneState() in call state management: new state is %d", state);
587        for (int stream = 0; stream < AUDIO_STREAM_CNT; stream++) {
588            if (stream == AUDIO_STREAM_PATCH) {
589                continue;
590            }
591            handleIncallSonification((audio_stream_type_t)stream, false, true);
592        }
593    }
594
595    // store previous phone state for management of sonification strategy below
596    int oldState = mPhoneState;
597    mPhoneState = state;
598    bool force = false;
599
600    // are we entering or starting a call
601    if (!isStateInCall(oldState) && isStateInCall(state)) {
602        ALOGV("  Entering call in setPhoneState()");
603        // force routing command to audio hardware when starting a call
604        // even if no device change is needed
605        force = true;
606        for (int j = 0; j < DEVICE_CATEGORY_CNT; j++) {
607            mStreams[AUDIO_STREAM_DTMF].mVolumeCurve[j] =
608                    sVolumeProfiles[AUDIO_STREAM_VOICE_CALL][j];
609        }
610    } else if (isStateInCall(oldState) && !isStateInCall(state)) {
611        ALOGV("  Exiting call in setPhoneState()");
612        // force routing command to audio hardware when exiting a call
613        // even if no device change is needed
614        force = true;
615        for (int j = 0; j < DEVICE_CATEGORY_CNT; j++) {
616            mStreams[AUDIO_STREAM_DTMF].mVolumeCurve[j] =
617                    sVolumeProfiles[AUDIO_STREAM_DTMF][j];
618        }
619    } else if (isStateInCall(state) && (state != oldState)) {
620        ALOGV("  Switching between telephony and VoIP in setPhoneState()");
621        // force routing command to audio hardware when switching between telephony and VoIP
622        // even if no device change is needed
623        force = true;
624    }
625
626    // check for device and output changes triggered by new phone state
627    checkA2dpSuspend();
628    checkOutputForAllStrategies();
629    updateDevicesAndOutputs();
630
631    sp<AudioOutputDescriptor> hwOutputDesc = mOutputs.valueFor(mPrimaryOutput);
632
633    int delayMs = 0;
634    if (isStateInCall(state)) {
635        nsecs_t sysTime = systemTime();
636        for (size_t i = 0; i < mOutputs.size(); i++) {
637            sp<AudioOutputDescriptor> desc = mOutputs.valueAt(i);
638            // mute media and sonification strategies and delay device switch by the largest
639            // latency of any output where either strategy is active.
640            // This avoid sending the ring tone or music tail into the earpiece or headset.
641            if ((desc->isStrategyActive(STRATEGY_MEDIA,
642                                     SONIFICATION_HEADSET_MUSIC_DELAY,
643                                     sysTime) ||
644                    desc->isStrategyActive(STRATEGY_SONIFICATION,
645                                         SONIFICATION_HEADSET_MUSIC_DELAY,
646                                         sysTime)) &&
647                    (delayMs < (int)desc->mLatency*2)) {
648                delayMs = desc->mLatency*2;
649            }
650            setStrategyMute(STRATEGY_MEDIA, true, mOutputs.keyAt(i));
651            setStrategyMute(STRATEGY_MEDIA, false, mOutputs.keyAt(i), MUTE_TIME_MS,
652                getDeviceForStrategy(STRATEGY_MEDIA, true /*fromCache*/));
653            setStrategyMute(STRATEGY_SONIFICATION, true, mOutputs.keyAt(i));
654            setStrategyMute(STRATEGY_SONIFICATION, false, mOutputs.keyAt(i), MUTE_TIME_MS,
655                getDeviceForStrategy(STRATEGY_SONIFICATION, true /*fromCache*/));
656        }
657    }
658
659    // Note that despite the fact that getNewOutputDevice() is called on the primary output,
660    // the device returned is not necessarily reachable via this output
661    audio_devices_t rxDevice = getNewOutputDevice(mPrimaryOutput, false /*fromCache*/);
662    // force routing command to audio hardware when ending call
663    // even if no device change is needed
664    if (isStateInCall(oldState) && rxDevice == AUDIO_DEVICE_NONE) {
665        rxDevice = hwOutputDesc->device();
666    }
667
668    if (state == AUDIO_MODE_IN_CALL) {
669        updateCallRouting(rxDevice, delayMs);
670    } else if (oldState == AUDIO_MODE_IN_CALL) {
671        if (mCallRxPatch != 0) {
672            mpClientInterface->releaseAudioPatch(mCallRxPatch->mAfPatchHandle, 0);
673            mCallRxPatch.clear();
674        }
675        if (mCallTxPatch != 0) {
676            mpClientInterface->releaseAudioPatch(mCallTxPatch->mAfPatchHandle, 0);
677            mCallTxPatch.clear();
678        }
679        setOutputDevice(mPrimaryOutput, rxDevice, force, 0);
680    } else {
681        setOutputDevice(mPrimaryOutput, rxDevice, force, 0);
682    }
683    // if entering in call state, handle special case of active streams
684    // pertaining to sonification strategy see handleIncallSonification()
685    if (isStateInCall(state)) {
686        ALOGV("setPhoneState() in call state management: new state is %d", state);
687        for (int stream = 0; stream < AUDIO_STREAM_CNT; stream++) {
688            if (stream == AUDIO_STREAM_PATCH) {
689                continue;
690            }
691            handleIncallSonification((audio_stream_type_t)stream, true, true);
692        }
693    }
694
695    // Flag that ringtone volume must be limited to music volume until we exit MODE_RINGTONE
696    if (state == AUDIO_MODE_RINGTONE &&
697        isStreamActive(AUDIO_STREAM_MUSIC, SONIFICATION_HEADSET_MUSIC_DELAY)) {
698        mLimitRingtoneVolume = true;
699    } else {
700        mLimitRingtoneVolume = false;
701    }
702}
703
704void AudioPolicyManager::setForceUse(audio_policy_force_use_t usage,
705                                         audio_policy_forced_cfg_t config)
706{
707    ALOGV("setForceUse() usage %d, config %d, mPhoneState %d", usage, config, mPhoneState);
708
709    bool forceVolumeReeval = false;
710    switch(usage) {
711    case AUDIO_POLICY_FORCE_FOR_COMMUNICATION:
712        if (config != AUDIO_POLICY_FORCE_SPEAKER && config != AUDIO_POLICY_FORCE_BT_SCO &&
713            config != AUDIO_POLICY_FORCE_NONE) {
714            ALOGW("setForceUse() invalid config %d for FOR_COMMUNICATION", config);
715            return;
716        }
717        forceVolumeReeval = true;
718        mForceUse[usage] = config;
719        break;
720    case AUDIO_POLICY_FORCE_FOR_MEDIA:
721        if (config != AUDIO_POLICY_FORCE_HEADPHONES && config != AUDIO_POLICY_FORCE_BT_A2DP &&
722            config != AUDIO_POLICY_FORCE_WIRED_ACCESSORY &&
723            config != AUDIO_POLICY_FORCE_ANALOG_DOCK &&
724            config != AUDIO_POLICY_FORCE_DIGITAL_DOCK && config != AUDIO_POLICY_FORCE_NONE &&
725            config != AUDIO_POLICY_FORCE_NO_BT_A2DP && config != AUDIO_POLICY_FORCE_SPEAKER ) {
726            ALOGW("setForceUse() invalid config %d for FOR_MEDIA", config);
727            return;
728        }
729        mForceUse[usage] = config;
730        break;
731    case AUDIO_POLICY_FORCE_FOR_RECORD:
732        if (config != AUDIO_POLICY_FORCE_BT_SCO && config != AUDIO_POLICY_FORCE_WIRED_ACCESSORY &&
733            config != AUDIO_POLICY_FORCE_NONE) {
734            ALOGW("setForceUse() invalid config %d for FOR_RECORD", config);
735            return;
736        }
737        mForceUse[usage] = config;
738        break;
739    case AUDIO_POLICY_FORCE_FOR_DOCK:
740        if (config != AUDIO_POLICY_FORCE_NONE && config != AUDIO_POLICY_FORCE_BT_CAR_DOCK &&
741            config != AUDIO_POLICY_FORCE_BT_DESK_DOCK &&
742            config != AUDIO_POLICY_FORCE_WIRED_ACCESSORY &&
743            config != AUDIO_POLICY_FORCE_ANALOG_DOCK &&
744            config != AUDIO_POLICY_FORCE_DIGITAL_DOCK) {
745            ALOGW("setForceUse() invalid config %d for FOR_DOCK", config);
746        }
747        forceVolumeReeval = true;
748        mForceUse[usage] = config;
749        break;
750    case AUDIO_POLICY_FORCE_FOR_SYSTEM:
751        if (config != AUDIO_POLICY_FORCE_NONE &&
752            config != AUDIO_POLICY_FORCE_SYSTEM_ENFORCED) {
753            ALOGW("setForceUse() invalid config %d for FOR_SYSTEM", config);
754        }
755        forceVolumeReeval = true;
756        mForceUse[usage] = config;
757        break;
758    case AUDIO_POLICY_FORCE_FOR_HDMI_SYSTEM_AUDIO:
759        if (config != AUDIO_POLICY_FORCE_NONE &&
760            config != AUDIO_POLICY_FORCE_HDMI_SYSTEM_AUDIO_ENFORCED) {
761            ALOGW("setForceUse() invalid config %d forHDMI_SYSTEM_AUDIO", config);
762        }
763        mForceUse[usage] = config;
764        break;
765    default:
766        ALOGW("setForceUse() invalid usage %d", usage);
767        break;
768    }
769
770    // check for device and output changes triggered by new force usage
771    checkA2dpSuspend();
772    checkOutputForAllStrategies();
773    updateDevicesAndOutputs();
774    if (mPhoneState == AUDIO_MODE_IN_CALL) {
775        audio_devices_t newDevice = getNewOutputDevice(mPrimaryOutput, true /*fromCache*/);
776        updateCallRouting(newDevice);
777    }
778    for (size_t i = 0; i < mOutputs.size(); i++) {
779        audio_io_handle_t output = mOutputs.keyAt(i);
780        audio_devices_t newDevice = getNewOutputDevice(output, true /*fromCache*/);
781        if ((mPhoneState != AUDIO_MODE_IN_CALL) || (output != mPrimaryOutput)) {
782            setOutputDevice(output, newDevice, (newDevice != AUDIO_DEVICE_NONE));
783        }
784        if (forceVolumeReeval && (newDevice != AUDIO_DEVICE_NONE)) {
785            applyStreamVolumes(output, newDevice, 0, true);
786        }
787    }
788
789    audio_io_handle_t activeInput = getActiveInput();
790    if (activeInput != 0) {
791        setInputDevice(activeInput, getNewInputDevice(activeInput));
792    }
793
794}
795
796audio_policy_forced_cfg_t AudioPolicyManager::getForceUse(audio_policy_force_use_t usage)
797{
798    return mForceUse[usage];
799}
800
801void AudioPolicyManager::setSystemProperty(const char* property, const char* value)
802{
803    ALOGV("setSystemProperty() property %s, value %s", property, value);
804}
805
806// Find a direct output profile compatible with the parameters passed, even if the input flags do
807// not explicitly request a direct output
808sp<AudioPolicyManager::IOProfile> AudioPolicyManager::getProfileForDirectOutput(
809                                                               audio_devices_t device,
810                                                               uint32_t samplingRate,
811                                                               audio_format_t format,
812                                                               audio_channel_mask_t channelMask,
813                                                               audio_output_flags_t flags)
814{
815    for (size_t i = 0; i < mHwModules.size(); i++) {
816        if (mHwModules[i]->mHandle == 0) {
817            continue;
818        }
819        for (size_t j = 0; j < mHwModules[i]->mOutputProfiles.size(); j++) {
820            sp<IOProfile> profile = mHwModules[i]->mOutputProfiles[j];
821            bool found = profile->isCompatibleProfile(device, samplingRate,
822                    NULL /*updatedSamplingRate*/, format, channelMask,
823                    flags & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD ?
824                        AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD : AUDIO_OUTPUT_FLAG_DIRECT);
825            if (found && (mAvailableOutputDevices.types() & profile->mSupportedDevices.types())) {
826                return profile;
827            }
828        }
829    }
830    return 0;
831}
832
833audio_io_handle_t AudioPolicyManager::getOutput(audio_stream_type_t stream,
834                                    uint32_t samplingRate,
835                                    audio_format_t format,
836                                    audio_channel_mask_t channelMask,
837                                    audio_output_flags_t flags,
838                                    const audio_offload_info_t *offloadInfo)
839{
840    routing_strategy strategy = getStrategy(stream);
841    audio_devices_t device = getDeviceForStrategy(strategy, false /*fromCache*/);
842    ALOGV("getOutput() device %d, stream %d, samplingRate %d, format %x, channelMask %x, flags %x",
843          device, stream, samplingRate, format, channelMask, flags);
844
845    return getOutputForDevice(device, AUDIO_SESSION_ALLOCATE,
846                              stream, samplingRate,format, channelMask,
847                              flags, offloadInfo);
848}
849
850status_t AudioPolicyManager::getOutputForAttr(const audio_attributes_t *attr,
851                                              audio_io_handle_t *output,
852                                              audio_session_t session,
853                                              audio_stream_type_t *stream,
854                                              uint32_t samplingRate,
855                                              audio_format_t format,
856                                              audio_channel_mask_t channelMask,
857                                              audio_output_flags_t flags,
858                                              const audio_offload_info_t *offloadInfo)
859{
860    audio_attributes_t attributes;
861    if (attr != NULL) {
862        if (!isValidAttributes(attr)) {
863            ALOGE("getOutputForAttr() invalid attributes: usage=%d content=%d flags=0x%x tags=[%s]",
864                  attr->usage, attr->content_type, attr->flags,
865                  attr->tags);
866            return BAD_VALUE;
867        }
868        attributes = *attr;
869    } else {
870        if (*stream < AUDIO_STREAM_MIN || *stream >= AUDIO_STREAM_PUBLIC_CNT) {
871            ALOGE("getOutputForAttr():  invalid stream type");
872            return BAD_VALUE;
873        }
874        stream_type_to_audio_attributes(*stream, &attributes);
875    }
876
877    ALOGV("getOutputForAttr() usage=%d, content=%d, tag=%s flags=%08x",
878            attributes.usage, attributes.content_type, attributes.tags, attributes.flags);
879
880    // TODO this is where filtering for custom policies (rerouting, dynamic sources) will go
881    routing_strategy strategy = (routing_strategy) getStrategyForAttr(&attributes);
882    audio_devices_t device = getDeviceForStrategy(strategy, false /*fromCache*/);
883
884    if ((attributes.flags & AUDIO_FLAG_HW_AV_SYNC) != 0) {
885        flags = (audio_output_flags_t)(flags | AUDIO_OUTPUT_FLAG_HW_AV_SYNC);
886    }
887
888    ALOGV("getOutputForAttr() device 0x%x, samplingRate %d, format %x, channelMask %x, flags %x",
889          device, samplingRate, format, channelMask, flags);
890
891    *stream = streamTypefromAttributesInt(&attributes);
892    *output = getOutputForDevice(device, session, *stream,
893                                 samplingRate, format, channelMask,
894                                 flags, offloadInfo);
895    if (*output == AUDIO_IO_HANDLE_NONE) {
896        return INVALID_OPERATION;
897    }
898    return NO_ERROR;
899}
900
901audio_io_handle_t AudioPolicyManager::getOutputForDevice(
902        audio_devices_t device,
903        audio_session_t session __unused,
904        audio_stream_type_t stream,
905        uint32_t samplingRate,
906        audio_format_t format,
907        audio_channel_mask_t channelMask,
908        audio_output_flags_t flags,
909        const audio_offload_info_t *offloadInfo)
910{
911    audio_io_handle_t output = AUDIO_IO_HANDLE_NONE;
912    uint32_t latency = 0;
913    status_t status;
914
915#ifdef AUDIO_POLICY_TEST
916    if (mCurOutput != 0) {
917        ALOGV("getOutput() test output mCurOutput %d, samplingRate %d, format %d, channelMask %x, mDirectOutput %d",
918                mCurOutput, mTestSamplingRate, mTestFormat, mTestChannels, mDirectOutput);
919
920        if (mTestOutputs[mCurOutput] == 0) {
921            ALOGV("getOutput() opening test output");
922            sp<AudioOutputDescriptor> outputDesc = new AudioOutputDescriptor(NULL);
923            outputDesc->mDevice = mTestDevice;
924            outputDesc->mLatency = mTestLatencyMs;
925            outputDesc->mFlags =
926                    (audio_output_flags_t)(mDirectOutput ? AUDIO_OUTPUT_FLAG_DIRECT : 0);
927            outputDesc->mRefCount[stream] = 0;
928            audio_config_t config = AUDIO_CONFIG_INITIALIZER;
929            config.sample_rate = mTestSamplingRate;
930            config.channel_mask = mTestChannels;
931            config.format = mTestFormat;
932            if (offloadInfo != NULL) {
933                config.offload_info = *offloadInfo;
934            }
935            status = mpClientInterface->openOutput(0,
936                                                  &mTestOutputs[mCurOutput],
937                                                  &config,
938                                                  &outputDesc->mDevice,
939                                                  String8(""),
940                                                  &outputDesc->mLatency,
941                                                  outputDesc->mFlags);
942            if (status == NO_ERROR) {
943                outputDesc->mSamplingRate = config.sample_rate;
944                outputDesc->mFormat = config.format;
945                outputDesc->mChannelMask = config.channel_mask;
946                AudioParameter outputCmd = AudioParameter();
947                outputCmd.addInt(String8("set_id"),mCurOutput);
948                mpClientInterface->setParameters(mTestOutputs[mCurOutput],outputCmd.toString());
949                addOutput(mTestOutputs[mCurOutput], outputDesc);
950            }
951        }
952        return mTestOutputs[mCurOutput];
953    }
954#endif //AUDIO_POLICY_TEST
955
956    // open a direct output if required by specified parameters
957    //force direct flag if offload flag is set: offloading implies a direct output stream
958    // and all common behaviors are driven by checking only the direct flag
959    // this should normally be set appropriately in the policy configuration file
960    if ((flags & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) != 0) {
961        flags = (audio_output_flags_t)(flags | AUDIO_OUTPUT_FLAG_DIRECT);
962    }
963    if ((flags & AUDIO_OUTPUT_FLAG_HW_AV_SYNC) != 0) {
964        flags = (audio_output_flags_t)(flags | AUDIO_OUTPUT_FLAG_DIRECT);
965    }
966    // only allow deep buffering for music stream type
967    if (stream != AUDIO_STREAM_MUSIC) {
968        flags = (audio_output_flags_t)(flags &~AUDIO_OUTPUT_FLAG_DEEP_BUFFER);
969    }
970
971    sp<IOProfile> profile;
972
973    // skip direct output selection if the request can obviously be attached to a mixed output
974    // and not explicitly requested
975    if (((flags & AUDIO_OUTPUT_FLAG_DIRECT) == 0) &&
976            audio_is_linear_pcm(format) && samplingRate <= MAX_MIXER_SAMPLING_RATE &&
977            audio_channel_count_from_out_mask(channelMask) <= 2) {
978        goto non_direct_output;
979    }
980
981    // Do not allow offloading if one non offloadable effect is enabled. This prevents from
982    // creating an offloaded track and tearing it down immediately after start when audioflinger
983    // detects there is an active non offloadable effect.
984    // FIXME: We should check the audio session here but we do not have it in this context.
985    // This may prevent offloading in rare situations where effects are left active by apps
986    // in the background.
987
988    if (((flags & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) == 0) ||
989            !isNonOffloadableEffectEnabled()) {
990        profile = getProfileForDirectOutput(device,
991                                           samplingRate,
992                                           format,
993                                           channelMask,
994                                           (audio_output_flags_t)flags);
995    }
996
997    if (profile != 0) {
998        sp<AudioOutputDescriptor> outputDesc = NULL;
999
1000        for (size_t i = 0; i < mOutputs.size(); i++) {
1001            sp<AudioOutputDescriptor> desc = mOutputs.valueAt(i);
1002            if (!desc->isDuplicated() && (profile == desc->mProfile)) {
1003                outputDesc = desc;
1004                // reuse direct output if currently open and configured with same parameters
1005                if ((samplingRate == outputDesc->mSamplingRate) &&
1006                        (format == outputDesc->mFormat) &&
1007                        (channelMask == outputDesc->mChannelMask)) {
1008                    outputDesc->mDirectOpenCount++;
1009                    ALOGV("getOutput() reusing direct output %d", mOutputs.keyAt(i));
1010                    return mOutputs.keyAt(i);
1011                }
1012            }
1013        }
1014        // close direct output if currently open and configured with different parameters
1015        if (outputDesc != NULL) {
1016            closeOutput(outputDesc->mIoHandle);
1017        }
1018        outputDesc = new AudioOutputDescriptor(profile);
1019        outputDesc->mDevice = device;
1020        outputDesc->mLatency = 0;
1021        outputDesc->mFlags =(audio_output_flags_t) (outputDesc->mFlags | flags);
1022        audio_config_t config = AUDIO_CONFIG_INITIALIZER;
1023        config.sample_rate = samplingRate;
1024        config.channel_mask = channelMask;
1025        config.format = format;
1026        if (offloadInfo != NULL) {
1027            config.offload_info = *offloadInfo;
1028        }
1029        status = mpClientInterface->openOutput(profile->mModule->mHandle,
1030                                               &output,
1031                                               &config,
1032                                               &outputDesc->mDevice,
1033                                               String8(""),
1034                                               &outputDesc->mLatency,
1035                                               outputDesc->mFlags);
1036
1037        // only accept an output with the requested parameters
1038        if (status != NO_ERROR ||
1039            (samplingRate != 0 && samplingRate != config.sample_rate) ||
1040            (format != AUDIO_FORMAT_DEFAULT && format != config.format) ||
1041            (channelMask != 0 && channelMask != config.channel_mask)) {
1042            ALOGV("getOutput() failed opening direct output: output %d samplingRate %d %d,"
1043                    "format %d %d, channelMask %04x %04x", output, samplingRate,
1044                    outputDesc->mSamplingRate, format, outputDesc->mFormat, channelMask,
1045                    outputDesc->mChannelMask);
1046            if (output != AUDIO_IO_HANDLE_NONE) {
1047                mpClientInterface->closeOutput(output);
1048            }
1049            return AUDIO_IO_HANDLE_NONE;
1050        }
1051        outputDesc->mSamplingRate = config.sample_rate;
1052        outputDesc->mChannelMask = config.channel_mask;
1053        outputDesc->mFormat = config.format;
1054        outputDesc->mRefCount[stream] = 0;
1055        outputDesc->mStopTime[stream] = 0;
1056        outputDesc->mDirectOpenCount = 1;
1057
1058        audio_io_handle_t srcOutput = getOutputForEffect();
1059        addOutput(output, outputDesc);
1060        audio_io_handle_t dstOutput = getOutputForEffect();
1061        if (dstOutput == output) {
1062            mpClientInterface->moveEffects(AUDIO_SESSION_OUTPUT_MIX, srcOutput, dstOutput);
1063        }
1064        mPreviousOutputs = mOutputs;
1065        ALOGV("getOutput() returns new direct output %d", output);
1066        mpClientInterface->onAudioPortListUpdate();
1067        return output;
1068    }
1069
1070non_direct_output:
1071
1072    // ignoring channel mask due to downmix capability in mixer
1073
1074    // open a non direct output
1075
1076    // for non direct outputs, only PCM is supported
1077    if (audio_is_linear_pcm(format)) {
1078        // get which output is suitable for the specified stream. The actual
1079        // routing change will happen when startOutput() will be called
1080        SortedVector<audio_io_handle_t> outputs = getOutputsForDevice(device, mOutputs);
1081
1082        // at this stage we should ignore the DIRECT flag as no direct output could be found earlier
1083        flags = (audio_output_flags_t)(flags & ~AUDIO_OUTPUT_FLAG_DIRECT);
1084        output = selectOutput(outputs, flags, format);
1085    }
1086    ALOGW_IF((output == 0), "getOutput() could not find output for stream %d, samplingRate %d,"
1087            "format %d, channels %x, flags %x", stream, samplingRate, format, channelMask, flags);
1088
1089    ALOGV("getOutput() returns output %d", output);
1090
1091    return output;
1092}
1093
1094audio_io_handle_t AudioPolicyManager::selectOutput(const SortedVector<audio_io_handle_t>& outputs,
1095                                                       audio_output_flags_t flags,
1096                                                       audio_format_t format)
1097{
1098    // select one output among several that provide a path to a particular device or set of
1099    // devices (the list was previously build by getOutputsForDevice()).
1100    // The priority is as follows:
1101    // 1: the output with the highest number of requested policy flags
1102    // 2: the primary output
1103    // 3: the first output in the list
1104
1105    if (outputs.size() == 0) {
1106        return 0;
1107    }
1108    if (outputs.size() == 1) {
1109        return outputs[0];
1110    }
1111
1112    int maxCommonFlags = 0;
1113    audio_io_handle_t outputFlags = 0;
1114    audio_io_handle_t outputPrimary = 0;
1115
1116    for (size_t i = 0; i < outputs.size(); i++) {
1117        sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(outputs[i]);
1118        if (!outputDesc->isDuplicated()) {
1119            // if a valid format is specified, skip output if not compatible
1120            if (format != AUDIO_FORMAT_INVALID) {
1121                if (outputDesc->mFlags & AUDIO_OUTPUT_FLAG_DIRECT) {
1122                    if (format != outputDesc->mFormat) {
1123                        continue;
1124                    }
1125                } else if (!audio_is_linear_pcm(format)) {
1126                    continue;
1127                }
1128            }
1129
1130            int commonFlags = popcount(outputDesc->mProfile->mFlags & flags);
1131            if (commonFlags > maxCommonFlags) {
1132                outputFlags = outputs[i];
1133                maxCommonFlags = commonFlags;
1134                ALOGV("selectOutput() commonFlags for output %d, %04x", outputs[i], commonFlags);
1135            }
1136            if (outputDesc->mProfile->mFlags & AUDIO_OUTPUT_FLAG_PRIMARY) {
1137                outputPrimary = outputs[i];
1138            }
1139        }
1140    }
1141
1142    if (outputFlags != 0) {
1143        return outputFlags;
1144    }
1145    if (outputPrimary != 0) {
1146        return outputPrimary;
1147    }
1148
1149    return outputs[0];
1150}
1151
1152status_t AudioPolicyManager::startOutput(audio_io_handle_t output,
1153                                             audio_stream_type_t stream,
1154                                             audio_session_t session)
1155{
1156    ALOGV("startOutput() output %d, stream %d, session %d", output, stream, session);
1157    ssize_t index = mOutputs.indexOfKey(output);
1158    if (index < 0) {
1159        ALOGW("startOutput() unknown output %d", output);
1160        return BAD_VALUE;
1161    }
1162
1163    // cannot start playback of STREAM_TTS if any other output is being used
1164    uint32_t beaconMuteLatency = 0;
1165    if (stream == AUDIO_STREAM_TTS) {
1166        ALOGV("\t found BEACON stream");
1167        if (isAnyOutputActive(AUDIO_STREAM_TTS /*streamToIgnore*/)) {
1168            return INVALID_OPERATION;
1169        } else {
1170            beaconMuteLatency = handleEventForBeacon(STARTING_BEACON);
1171        }
1172    } else {
1173        // some playback other than beacon starts
1174        beaconMuteLatency = handleEventForBeacon(STARTING_OUTPUT);
1175    }
1176
1177    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(index);
1178
1179    // increment usage count for this stream on the requested output:
1180    // NOTE that the usage count is the same for duplicated output and hardware output which is
1181    // necessary for a correct control of hardware output routing by startOutput() and stopOutput()
1182    outputDesc->changeRefCount(stream, 1);
1183
1184    if (outputDesc->mRefCount[stream] == 1) {
1185        audio_devices_t newDevice = getNewOutputDevice(output, false /*fromCache*/);
1186        routing_strategy strategy = getStrategy(stream);
1187        bool shouldWait = (strategy == STRATEGY_SONIFICATION) ||
1188                            (strategy == STRATEGY_SONIFICATION_RESPECTFUL) ||
1189                            (beaconMuteLatency > 0);
1190        uint32_t waitMs = beaconMuteLatency;
1191        bool force = false;
1192        for (size_t i = 0; i < mOutputs.size(); i++) {
1193            sp<AudioOutputDescriptor> desc = mOutputs.valueAt(i);
1194            if (desc != outputDesc) {
1195                // force a device change if any other output is managed by the same hw
1196                // module and has a current device selection that differs from selected device.
1197                // In this case, the audio HAL must receive the new device selection so that it can
1198                // change the device currently selected by the other active output.
1199                if (outputDesc->sharesHwModuleWith(desc) &&
1200                    desc->device() != newDevice) {
1201                    force = true;
1202                }
1203                // wait for audio on other active outputs to be presented when starting
1204                // a notification so that audio focus effect can propagate, or that a mute/unmute
1205                // event occurred for beacon
1206                uint32_t latency = desc->latency();
1207                if (shouldWait && desc->isActive(latency * 2) && (waitMs < latency)) {
1208                    waitMs = latency;
1209                }
1210            }
1211        }
1212        uint32_t muteWaitMs = setOutputDevice(output, newDevice, force);
1213
1214        // handle special case for sonification while in call
1215        if (isInCall()) {
1216            handleIncallSonification(stream, true, false);
1217        }
1218
1219        // apply volume rules for current stream and device if necessary
1220        checkAndSetVolume(stream,
1221                          mStreams[stream].getVolumeIndex(newDevice),
1222                          output,
1223                          newDevice);
1224
1225        // update the outputs if starting an output with a stream that can affect notification
1226        // routing
1227        handleNotificationRoutingForStream(stream);
1228        if (waitMs > muteWaitMs) {
1229            usleep((waitMs - muteWaitMs) * 2 * 1000);
1230        }
1231    }
1232    return NO_ERROR;
1233}
1234
1235
1236status_t AudioPolicyManager::stopOutput(audio_io_handle_t output,
1237                                            audio_stream_type_t stream,
1238                                            audio_session_t session)
1239{
1240    ALOGV("stopOutput() output %d, stream %d, session %d", output, stream, session);
1241    ssize_t index = mOutputs.indexOfKey(output);
1242    if (index < 0) {
1243        ALOGW("stopOutput() unknown output %d", output);
1244        return BAD_VALUE;
1245    }
1246
1247    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(index);
1248
1249    // always handle stream stop, check which stream type is stopping
1250    handleEventForBeacon(stream == AUDIO_STREAM_TTS ? STOPPING_BEACON : STOPPING_OUTPUT);
1251
1252    // handle special case for sonification while in call
1253    if (isInCall()) {
1254        handleIncallSonification(stream, false, false);
1255    }
1256
1257    if (outputDesc->mRefCount[stream] > 0) {
1258        // decrement usage count of this stream on the output
1259        outputDesc->changeRefCount(stream, -1);
1260        // store time at which the stream was stopped - see isStreamActive()
1261        if (outputDesc->mRefCount[stream] == 0) {
1262            outputDesc->mStopTime[stream] = systemTime();
1263            audio_devices_t newDevice = getNewOutputDevice(output, false /*fromCache*/);
1264            // delay the device switch by twice the latency because stopOutput() is executed when
1265            // the track stop() command is received and at that time the audio track buffer can
1266            // still contain data that needs to be drained. The latency only covers the audio HAL
1267            // and kernel buffers. Also the latency does not always include additional delay in the
1268            // audio path (audio DSP, CODEC ...)
1269            setOutputDevice(output, newDevice, false, outputDesc->mLatency*2);
1270
1271            // force restoring the device selection on other active outputs if it differs from the
1272            // one being selected for this output
1273            for (size_t i = 0; i < mOutputs.size(); i++) {
1274                audio_io_handle_t curOutput = mOutputs.keyAt(i);
1275                sp<AudioOutputDescriptor> desc = mOutputs.valueAt(i);
1276                if (curOutput != output &&
1277                        desc->isActive() &&
1278                        outputDesc->sharesHwModuleWith(desc) &&
1279                        (newDevice != desc->device())) {
1280                    setOutputDevice(curOutput,
1281                                    getNewOutputDevice(curOutput, false /*fromCache*/),
1282                                    true,
1283                                    outputDesc->mLatency*2);
1284                }
1285            }
1286            // update the outputs if stopping one with a stream that can affect notification routing
1287            handleNotificationRoutingForStream(stream);
1288        }
1289        return NO_ERROR;
1290    } else {
1291        ALOGW("stopOutput() refcount is already 0 for output %d", output);
1292        return INVALID_OPERATION;
1293    }
1294}
1295
1296void AudioPolicyManager::releaseOutput(audio_io_handle_t output,
1297                                       audio_stream_type_t stream __unused,
1298                                       audio_session_t session __unused)
1299{
1300    ALOGV("releaseOutput() %d", output);
1301    ssize_t index = mOutputs.indexOfKey(output);
1302    if (index < 0) {
1303        ALOGW("releaseOutput() releasing unknown output %d", output);
1304        return;
1305    }
1306
1307#ifdef AUDIO_POLICY_TEST
1308    int testIndex = testOutputIndex(output);
1309    if (testIndex != 0) {
1310        sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(index);
1311        if (outputDesc->isActive()) {
1312            mpClientInterface->closeOutput(output);
1313            mOutputs.removeItem(output);
1314            mTestOutputs[testIndex] = 0;
1315        }
1316        return;
1317    }
1318#endif //AUDIO_POLICY_TEST
1319
1320    sp<AudioOutputDescriptor> desc = mOutputs.valueAt(index);
1321    if (desc->mFlags & AUDIO_OUTPUT_FLAG_DIRECT) {
1322        if (desc->mDirectOpenCount <= 0) {
1323            ALOGW("releaseOutput() invalid open count %d for output %d",
1324                                                              desc->mDirectOpenCount, output);
1325            return;
1326        }
1327        if (--desc->mDirectOpenCount == 0) {
1328            closeOutput(output);
1329            // If effects where present on the output, audioflinger moved them to the primary
1330            // output by default: move them back to the appropriate output.
1331            audio_io_handle_t dstOutput = getOutputForEffect();
1332            if (dstOutput != mPrimaryOutput) {
1333                mpClientInterface->moveEffects(AUDIO_SESSION_OUTPUT_MIX, mPrimaryOutput, dstOutput);
1334            }
1335            mpClientInterface->onAudioPortListUpdate();
1336        }
1337    }
1338}
1339
1340
1341status_t AudioPolicyManager::getInputForAttr(const audio_attributes_t *attr,
1342                                             audio_io_handle_t *input,
1343                                             audio_session_t session,
1344                                             uint32_t samplingRate,
1345                                             audio_format_t format,
1346                                             audio_channel_mask_t channelMask,
1347                                             audio_input_flags_t flags)
1348{
1349    ALOGV("getInputForAttr() source %d, samplingRate %d, format %d, channelMask %x,"
1350            "session %d, flags %#x",
1351          attr->source, samplingRate, format, channelMask, session, flags);
1352
1353    audio_devices_t device = getDeviceForInputSource(attr->source);
1354
1355    if (device == AUDIO_DEVICE_NONE) {
1356        ALOGW("getInputForAttr() could not find device for source %d", attr->source);
1357        return BAD_VALUE;
1358    }
1359
1360    // adapt channel selection to input source
1361    switch (attr->source) {
1362    case AUDIO_SOURCE_VOICE_UPLINK:
1363        channelMask = AUDIO_CHANNEL_IN_VOICE_UPLINK;
1364        break;
1365    case AUDIO_SOURCE_VOICE_DOWNLINK:
1366        channelMask = AUDIO_CHANNEL_IN_VOICE_DNLINK;
1367        break;
1368    case AUDIO_SOURCE_VOICE_CALL:
1369        channelMask = AUDIO_CHANNEL_IN_VOICE_UPLINK | AUDIO_CHANNEL_IN_VOICE_DNLINK;
1370        break;
1371    default:
1372        break;
1373    }
1374
1375    *input = AUDIO_IO_HANDLE_NONE;
1376    bool isSoundTrigger = false;
1377    audio_source_t halInputSource = attr->source;
1378    if (attr->source == AUDIO_SOURCE_HOTWORD) {
1379        ssize_t index = mSoundTriggerSessions.indexOfKey(session);
1380        if (index >= 0) {
1381            *input = mSoundTriggerSessions.valueFor(session);
1382            isSoundTrigger = true;
1383            flags = (audio_input_flags_t)(flags | AUDIO_INPUT_FLAG_HW_HOTWORD);
1384            ALOGV("SoundTrigger capture on session %d input %d", session, *input);
1385        } else {
1386            halInputSource = AUDIO_SOURCE_VOICE_RECOGNITION;
1387        }
1388    }
1389
1390    sp<IOProfile> profile = getInputProfile(device,
1391                                         samplingRate,
1392                                         format,
1393                                         channelMask,
1394                                         flags);
1395    if (profile == 0) {
1396        //retry without flags
1397        audio_input_flags_t log_flags = flags;
1398        flags = AUDIO_INPUT_FLAG_NONE;
1399        profile = getInputProfile(device,
1400                                 samplingRate,
1401                                 format,
1402                                 channelMask,
1403                                 flags);
1404        if (profile == 0) {
1405            ALOGW("getInputForAttr() could not find profile for device 0x%X, samplingRate %u,"
1406                    "format %#x, channelMask 0x%X, flags %#x",
1407                    device, samplingRate, format, channelMask, log_flags);
1408            return BAD_VALUE;
1409        }
1410    }
1411
1412    if (profile->mModule->mHandle == 0) {
1413        ALOGE("getInputForAttr(): HW module %s not opened", profile->mModule->mName);
1414        return NO_INIT;
1415    }
1416
1417    audio_config_t config = AUDIO_CONFIG_INITIALIZER;
1418    config.sample_rate = samplingRate;
1419    config.channel_mask = channelMask;
1420    config.format = format;
1421
1422    // handle legacy remote submix case where the address was not always specified
1423    String8 address = deviceDistinguishesOnAddress(device) ? String8("0") : String8("");
1424
1425    status_t status = mpClientInterface->openInput(profile->mModule->mHandle,
1426                                                   input,
1427                                                   &config,
1428                                                   &device,
1429                                                   address,
1430                                                   halInputSource,
1431                                                   flags);
1432
1433    // only accept input with the exact requested set of parameters
1434    if (status != NO_ERROR || *input == AUDIO_IO_HANDLE_NONE ||
1435        (samplingRate != config.sample_rate) ||
1436        (format != config.format) ||
1437        (channelMask != config.channel_mask)) {
1438        ALOGW("getInputForAttr() failed opening input: samplingRate %d, format %d, channelMask %x",
1439                samplingRate, format, channelMask);
1440        if (*input != AUDIO_IO_HANDLE_NONE) {
1441            mpClientInterface->closeInput(*input);
1442        }
1443        return BAD_VALUE;
1444    }
1445
1446    sp<AudioInputDescriptor> inputDesc = new AudioInputDescriptor(profile);
1447    inputDesc->mInputSource = attr->source;
1448    inputDesc->mRefCount = 0;
1449    inputDesc->mOpenRefCount = 1;
1450    inputDesc->mSamplingRate = samplingRate;
1451    inputDesc->mFormat = format;
1452    inputDesc->mChannelMask = channelMask;
1453    inputDesc->mDevice = device;
1454    inputDesc->mSessions.add(session);
1455    inputDesc->mIsSoundTrigger = isSoundTrigger;
1456
1457    addInput(*input, inputDesc);
1458    mpClientInterface->onAudioPortListUpdate();
1459    return NO_ERROR;
1460}
1461
1462status_t AudioPolicyManager::startInput(audio_io_handle_t input,
1463                                        audio_session_t session)
1464{
1465    ALOGV("startInput() input %d", input);
1466    ssize_t index = mInputs.indexOfKey(input);
1467    if (index < 0) {
1468        ALOGW("startInput() unknown input %d", input);
1469        return BAD_VALUE;
1470    }
1471    sp<AudioInputDescriptor> inputDesc = mInputs.valueAt(index);
1472
1473    index = inputDesc->mSessions.indexOf(session);
1474    if (index < 0) {
1475        ALOGW("startInput() unknown session %d on input %d", session, input);
1476        return BAD_VALUE;
1477    }
1478
1479    // virtual input devices are compatible with other input devices
1480    if (!isVirtualInputDevice(inputDesc->mDevice)) {
1481
1482        // for a non-virtual input device, check if there is another (non-virtual) active input
1483        audio_io_handle_t activeInput = getActiveInput();
1484        if (activeInput != 0 && activeInput != input) {
1485
1486            // If the already active input uses AUDIO_SOURCE_HOTWORD then it is closed,
1487            // otherwise the active input continues and the new input cannot be started.
1488            sp<AudioInputDescriptor> activeDesc = mInputs.valueFor(activeInput);
1489            if (activeDesc->mInputSource == AUDIO_SOURCE_HOTWORD) {
1490                ALOGW("startInput(%d) preempting low-priority input %d", input, activeInput);
1491                stopInput(activeInput, activeDesc->mSessions.itemAt(0));
1492                releaseInput(activeInput, activeDesc->mSessions.itemAt(0));
1493            } else {
1494                ALOGE("startInput(%d) failed: other input %d already started", input, activeInput);
1495                return INVALID_OPERATION;
1496            }
1497        }
1498    }
1499
1500    if (inputDesc->mRefCount == 0) {
1501        if (activeInputsCount() == 0) {
1502            SoundTrigger::setCaptureState(true);
1503        }
1504        setInputDevice(input, getNewInputDevice(input), true /* force */);
1505
1506        // Automatically enable the remote submix output when input is started.
1507        // For remote submix (a virtual device), we open only one input per capture request.
1508        if (audio_is_remote_submix_device(inputDesc->mDevice)) {
1509            setDeviceConnectionState(AUDIO_DEVICE_OUT_REMOTE_SUBMIX,
1510                    AUDIO_POLICY_DEVICE_STATE_AVAILABLE, AUDIO_REMOTE_SUBMIX_DEVICE_ADDRESS);
1511        }
1512    }
1513
1514    ALOGV("AudioPolicyManager::startInput() input source = %d", inputDesc->mInputSource);
1515
1516    inputDesc->mRefCount++;
1517    return NO_ERROR;
1518}
1519
1520status_t AudioPolicyManager::stopInput(audio_io_handle_t input,
1521                                       audio_session_t session)
1522{
1523    ALOGV("stopInput() input %d", input);
1524    ssize_t index = mInputs.indexOfKey(input);
1525    if (index < 0) {
1526        ALOGW("stopInput() unknown input %d", input);
1527        return BAD_VALUE;
1528    }
1529    sp<AudioInputDescriptor> inputDesc = mInputs.valueAt(index);
1530
1531    index = inputDesc->mSessions.indexOf(session);
1532    if (index < 0) {
1533        ALOGW("stopInput() unknown session %d on input %d", session, input);
1534        return BAD_VALUE;
1535    }
1536
1537    if (inputDesc->mRefCount == 0) {
1538        ALOGW("stopInput() input %d already stopped", input);
1539        return INVALID_OPERATION;
1540    }
1541
1542    inputDesc->mRefCount--;
1543    if (inputDesc->mRefCount == 0) {
1544
1545        // automatically disable the remote submix output when input is stopped
1546        if (audio_is_remote_submix_device(inputDesc->mDevice)) {
1547            setDeviceConnectionState(AUDIO_DEVICE_OUT_REMOTE_SUBMIX,
1548                    AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE, AUDIO_REMOTE_SUBMIX_DEVICE_ADDRESS);
1549        }
1550
1551        resetInputDevice(input);
1552
1553        if (activeInputsCount() == 0) {
1554            SoundTrigger::setCaptureState(false);
1555        }
1556    }
1557    return NO_ERROR;
1558}
1559
1560void AudioPolicyManager::releaseInput(audio_io_handle_t input,
1561                                      audio_session_t session)
1562{
1563    ALOGV("releaseInput() %d", input);
1564    ssize_t index = mInputs.indexOfKey(input);
1565    if (index < 0) {
1566        ALOGW("releaseInput() releasing unknown input %d", input);
1567        return;
1568    }
1569    sp<AudioInputDescriptor> inputDesc = mInputs.valueAt(index);
1570    ALOG_ASSERT(inputDesc != 0);
1571
1572    index = inputDesc->mSessions.indexOf(session);
1573    if (index < 0) {
1574        ALOGW("releaseInput() unknown session %d on input %d", session, input);
1575        return;
1576    }
1577    inputDesc->mSessions.remove(session);
1578    if (inputDesc->mOpenRefCount == 0) {
1579        ALOGW("releaseInput() invalid open ref count %d", inputDesc->mOpenRefCount);
1580        return;
1581    }
1582    inputDesc->mOpenRefCount--;
1583    if (inputDesc->mOpenRefCount > 0) {
1584        ALOGV("releaseInput() exit > 0");
1585        return;
1586    }
1587
1588    closeInput(input);
1589    mpClientInterface->onAudioPortListUpdate();
1590    ALOGV("releaseInput() exit");
1591}
1592
1593void AudioPolicyManager::closeAllInputs() {
1594    bool patchRemoved = false;
1595
1596    for(size_t input_index = 0; input_index < mInputs.size(); input_index++) {
1597        sp<AudioInputDescriptor> inputDesc = mInputs.valueAt(input_index);
1598        ssize_t patch_index = mAudioPatches.indexOfKey(inputDesc->mPatchHandle);
1599        if (patch_index >= 0) {
1600            sp<AudioPatch> patchDesc = mAudioPatches.valueAt(patch_index);
1601            status_t status = mpClientInterface->releaseAudioPatch(patchDesc->mAfPatchHandle, 0);
1602            mAudioPatches.removeItemsAt(patch_index);
1603            patchRemoved = true;
1604        }
1605        mpClientInterface->closeInput(mInputs.keyAt(input_index));
1606    }
1607    mInputs.clear();
1608    nextAudioPortGeneration();
1609
1610    if (patchRemoved) {
1611        mpClientInterface->onAudioPatchListUpdate();
1612    }
1613}
1614
1615void AudioPolicyManager::initStreamVolume(audio_stream_type_t stream,
1616                                            int indexMin,
1617                                            int indexMax)
1618{
1619    ALOGV("initStreamVolume() stream %d, min %d, max %d", stream , indexMin, indexMax);
1620    if (indexMin < 0 || indexMin >= indexMax) {
1621        ALOGW("initStreamVolume() invalid index limits for stream %d, min %d, max %d", stream , indexMin, indexMax);
1622        return;
1623    }
1624    mStreams[stream].mIndexMin = indexMin;
1625    mStreams[stream].mIndexMax = indexMax;
1626    //FIXME: AUDIO_STREAM_ACCESSIBILITY volume follows AUDIO_STREAM_MUSIC for now
1627    if (stream == AUDIO_STREAM_MUSIC) {
1628        mStreams[AUDIO_STREAM_ACCESSIBILITY].mIndexMin = indexMin;
1629        mStreams[AUDIO_STREAM_ACCESSIBILITY].mIndexMax = indexMax;
1630    }
1631}
1632
1633status_t AudioPolicyManager::setStreamVolumeIndex(audio_stream_type_t stream,
1634                                                      int index,
1635                                                      audio_devices_t device)
1636{
1637
1638    if ((index < mStreams[stream].mIndexMin) || (index > mStreams[stream].mIndexMax)) {
1639        return BAD_VALUE;
1640    }
1641    if (!audio_is_output_device(device)) {
1642        return BAD_VALUE;
1643    }
1644
1645    // Force max volume if stream cannot be muted
1646    if (!mStreams[stream].mCanBeMuted) index = mStreams[stream].mIndexMax;
1647
1648    ALOGV("setStreamVolumeIndex() stream %d, device %04x, index %d",
1649          stream, device, index);
1650
1651    // if device is AUDIO_DEVICE_OUT_DEFAULT set default value and
1652    // clear all device specific values
1653    if (device == AUDIO_DEVICE_OUT_DEFAULT) {
1654        mStreams[stream].mIndexCur.clear();
1655    }
1656    mStreams[stream].mIndexCur.add(device, index);
1657
1658    // update volume on all outputs whose current device is also selected by the same
1659    // strategy as the device specified by the caller
1660    audio_devices_t strategyDevice = getDeviceForStrategy(getStrategy(stream), true /*fromCache*/);
1661
1662
1663    //FIXME: AUDIO_STREAM_ACCESSIBILITY volume follows AUDIO_STREAM_MUSIC for now
1664    audio_devices_t accessibilityDevice = AUDIO_DEVICE_NONE;
1665    if (stream == AUDIO_STREAM_MUSIC) {
1666        mStreams[AUDIO_STREAM_ACCESSIBILITY].mIndexCur.add(device, index);
1667        accessibilityDevice = getDeviceForStrategy(STRATEGY_ACCESSIBILITY, true /*fromCache*/);
1668    }
1669    if ((device != AUDIO_DEVICE_OUT_DEFAULT) &&
1670            (device & (strategyDevice | accessibilityDevice)) == 0) {
1671        return NO_ERROR;
1672    }
1673    status_t status = NO_ERROR;
1674    for (size_t i = 0; i < mOutputs.size(); i++) {
1675        audio_devices_t curDevice =
1676                getDeviceForVolume(mOutputs.valueAt(i)->device());
1677        if ((device == AUDIO_DEVICE_OUT_DEFAULT) || ((curDevice & strategyDevice) != 0)) {
1678            status_t volStatus = checkAndSetVolume(stream, index, mOutputs.keyAt(i), curDevice);
1679            if (volStatus != NO_ERROR) {
1680                status = volStatus;
1681            }
1682        }
1683        if ((device == AUDIO_DEVICE_OUT_DEFAULT) || ((curDevice & accessibilityDevice) != 0)) {
1684            status_t volStatus = checkAndSetVolume(AUDIO_STREAM_ACCESSIBILITY,
1685                                                   index, mOutputs.keyAt(i), curDevice);
1686        }
1687    }
1688    return status;
1689}
1690
1691status_t AudioPolicyManager::getStreamVolumeIndex(audio_stream_type_t stream,
1692                                                      int *index,
1693                                                      audio_devices_t device)
1694{
1695    if (index == NULL) {
1696        return BAD_VALUE;
1697    }
1698    if (!audio_is_output_device(device)) {
1699        return BAD_VALUE;
1700    }
1701    // if device is AUDIO_DEVICE_OUT_DEFAULT, return volume for device corresponding to
1702    // the strategy the stream belongs to.
1703    if (device == AUDIO_DEVICE_OUT_DEFAULT) {
1704        device = getDeviceForStrategy(getStrategy(stream), true /*fromCache*/);
1705    }
1706    device = getDeviceForVolume(device);
1707
1708    *index =  mStreams[stream].getVolumeIndex(device);
1709    ALOGV("getStreamVolumeIndex() stream %d device %08x index %d", stream, device, *index);
1710    return NO_ERROR;
1711}
1712
1713audio_io_handle_t AudioPolicyManager::selectOutputForEffects(
1714                                            const SortedVector<audio_io_handle_t>& outputs)
1715{
1716    // select one output among several suitable for global effects.
1717    // The priority is as follows:
1718    // 1: An offloaded output. If the effect ends up not being offloadable,
1719    //    AudioFlinger will invalidate the track and the offloaded output
1720    //    will be closed causing the effect to be moved to a PCM output.
1721    // 2: A deep buffer output
1722    // 3: the first output in the list
1723
1724    if (outputs.size() == 0) {
1725        return 0;
1726    }
1727
1728    audio_io_handle_t outputOffloaded = 0;
1729    audio_io_handle_t outputDeepBuffer = 0;
1730
1731    for (size_t i = 0; i < outputs.size(); i++) {
1732        sp<AudioOutputDescriptor> desc = mOutputs.valueFor(outputs[i]);
1733        ALOGV("selectOutputForEffects outputs[%zu] flags %x", i, desc->mFlags);
1734        if ((desc->mFlags & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) != 0) {
1735            outputOffloaded = outputs[i];
1736        }
1737        if ((desc->mFlags & AUDIO_OUTPUT_FLAG_DEEP_BUFFER) != 0) {
1738            outputDeepBuffer = outputs[i];
1739        }
1740    }
1741
1742    ALOGV("selectOutputForEffects outputOffloaded %d outputDeepBuffer %d",
1743          outputOffloaded, outputDeepBuffer);
1744    if (outputOffloaded != 0) {
1745        return outputOffloaded;
1746    }
1747    if (outputDeepBuffer != 0) {
1748        return outputDeepBuffer;
1749    }
1750
1751    return outputs[0];
1752}
1753
1754audio_io_handle_t AudioPolicyManager::getOutputForEffect(const effect_descriptor_t *desc)
1755{
1756    // apply simple rule where global effects are attached to the same output as MUSIC streams
1757
1758    routing_strategy strategy = getStrategy(AUDIO_STREAM_MUSIC);
1759    audio_devices_t device = getDeviceForStrategy(strategy, false /*fromCache*/);
1760    SortedVector<audio_io_handle_t> dstOutputs = getOutputsForDevice(device, mOutputs);
1761
1762    audio_io_handle_t output = selectOutputForEffects(dstOutputs);
1763    ALOGV("getOutputForEffect() got output %d for fx %s flags %x",
1764          output, (desc == NULL) ? "unspecified" : desc->name,  (desc == NULL) ? 0 : desc->flags);
1765
1766    return output;
1767}
1768
1769status_t AudioPolicyManager::registerEffect(const effect_descriptor_t *desc,
1770                                audio_io_handle_t io,
1771                                uint32_t strategy,
1772                                int session,
1773                                int id)
1774{
1775    ssize_t index = mOutputs.indexOfKey(io);
1776    if (index < 0) {
1777        index = mInputs.indexOfKey(io);
1778        if (index < 0) {
1779            ALOGW("registerEffect() unknown io %d", io);
1780            return INVALID_OPERATION;
1781        }
1782    }
1783
1784    if (mTotalEffectsMemory + desc->memoryUsage > getMaxEffectsMemory()) {
1785        ALOGW("registerEffect() memory limit exceeded for Fx %s, Memory %d KB",
1786                desc->name, desc->memoryUsage);
1787        return INVALID_OPERATION;
1788    }
1789    mTotalEffectsMemory += desc->memoryUsage;
1790    ALOGV("registerEffect() effect %s, io %d, strategy %d session %d id %d",
1791            desc->name, io, strategy, session, id);
1792    ALOGV("registerEffect() memory %d, total memory %d", desc->memoryUsage, mTotalEffectsMemory);
1793
1794    sp<EffectDescriptor> effectDesc = new EffectDescriptor();
1795    memcpy (&effectDesc->mDesc, desc, sizeof(effect_descriptor_t));
1796    effectDesc->mIo = io;
1797    effectDesc->mStrategy = (routing_strategy)strategy;
1798    effectDesc->mSession = session;
1799    effectDesc->mEnabled = false;
1800
1801    mEffects.add(id, effectDesc);
1802
1803    return NO_ERROR;
1804}
1805
1806status_t AudioPolicyManager::unregisterEffect(int id)
1807{
1808    ssize_t index = mEffects.indexOfKey(id);
1809    if (index < 0) {
1810        ALOGW("unregisterEffect() unknown effect ID %d", id);
1811        return INVALID_OPERATION;
1812    }
1813
1814    sp<EffectDescriptor> effectDesc = mEffects.valueAt(index);
1815
1816    setEffectEnabled(effectDesc, false);
1817
1818    if (mTotalEffectsMemory < effectDesc->mDesc.memoryUsage) {
1819        ALOGW("unregisterEffect() memory %d too big for total %d",
1820                effectDesc->mDesc.memoryUsage, mTotalEffectsMemory);
1821        effectDesc->mDesc.memoryUsage = mTotalEffectsMemory;
1822    }
1823    mTotalEffectsMemory -= effectDesc->mDesc.memoryUsage;
1824    ALOGV("unregisterEffect() effect %s, ID %d, memory %d total memory %d",
1825            effectDesc->mDesc.name, id, effectDesc->mDesc.memoryUsage, mTotalEffectsMemory);
1826
1827    mEffects.removeItem(id);
1828
1829    return NO_ERROR;
1830}
1831
1832status_t AudioPolicyManager::setEffectEnabled(int id, bool enabled)
1833{
1834    ssize_t index = mEffects.indexOfKey(id);
1835    if (index < 0) {
1836        ALOGW("unregisterEffect() unknown effect ID %d", id);
1837        return INVALID_OPERATION;
1838    }
1839
1840    return setEffectEnabled(mEffects.valueAt(index), enabled);
1841}
1842
1843status_t AudioPolicyManager::setEffectEnabled(const sp<EffectDescriptor>& effectDesc, bool enabled)
1844{
1845    if (enabled == effectDesc->mEnabled) {
1846        ALOGV("setEffectEnabled(%s) effect already %s",
1847             enabled?"true":"false", enabled?"enabled":"disabled");
1848        return INVALID_OPERATION;
1849    }
1850
1851    if (enabled) {
1852        if (mTotalEffectsCpuLoad + effectDesc->mDesc.cpuLoad > getMaxEffectsCpuLoad()) {
1853            ALOGW("setEffectEnabled(true) CPU Load limit exceeded for Fx %s, CPU %f MIPS",
1854                 effectDesc->mDesc.name, (float)effectDesc->mDesc.cpuLoad/10);
1855            return INVALID_OPERATION;
1856        }
1857        mTotalEffectsCpuLoad += effectDesc->mDesc.cpuLoad;
1858        ALOGV("setEffectEnabled(true) total CPU %d", mTotalEffectsCpuLoad);
1859    } else {
1860        if (mTotalEffectsCpuLoad < effectDesc->mDesc.cpuLoad) {
1861            ALOGW("setEffectEnabled(false) CPU load %d too high for total %d",
1862                    effectDesc->mDesc.cpuLoad, mTotalEffectsCpuLoad);
1863            effectDesc->mDesc.cpuLoad = mTotalEffectsCpuLoad;
1864        }
1865        mTotalEffectsCpuLoad -= effectDesc->mDesc.cpuLoad;
1866        ALOGV("setEffectEnabled(false) total CPU %d", mTotalEffectsCpuLoad);
1867    }
1868    effectDesc->mEnabled = enabled;
1869    return NO_ERROR;
1870}
1871
1872bool AudioPolicyManager::isNonOffloadableEffectEnabled()
1873{
1874    for (size_t i = 0; i < mEffects.size(); i++) {
1875        sp<EffectDescriptor> effectDesc = mEffects.valueAt(i);
1876        if (effectDesc->mEnabled && (effectDesc->mStrategy == STRATEGY_MEDIA) &&
1877                ((effectDesc->mDesc.flags & EFFECT_FLAG_OFFLOAD_SUPPORTED) == 0)) {
1878            ALOGV("isNonOffloadableEffectEnabled() non offloadable effect %s enabled on session %d",
1879                  effectDesc->mDesc.name, effectDesc->mSession);
1880            return true;
1881        }
1882    }
1883    return false;
1884}
1885
1886bool AudioPolicyManager::isStreamActive(audio_stream_type_t stream, uint32_t inPastMs) const
1887{
1888    nsecs_t sysTime = systemTime();
1889    for (size_t i = 0; i < mOutputs.size(); i++) {
1890        const sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(i);
1891        if (outputDesc->isStreamActive(stream, inPastMs, sysTime)) {
1892            return true;
1893        }
1894    }
1895    return false;
1896}
1897
1898bool AudioPolicyManager::isStreamActiveRemotely(audio_stream_type_t stream,
1899                                                    uint32_t inPastMs) const
1900{
1901    nsecs_t sysTime = systemTime();
1902    for (size_t i = 0; i < mOutputs.size(); i++) {
1903        const sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(i);
1904        if (((outputDesc->device() & APM_AUDIO_OUT_DEVICE_REMOTE_ALL) != 0) &&
1905                outputDesc->isStreamActive(stream, inPastMs, sysTime)) {
1906            return true;
1907        }
1908    }
1909    return false;
1910}
1911
1912bool AudioPolicyManager::isSourceActive(audio_source_t source) const
1913{
1914    for (size_t i = 0; i < mInputs.size(); i++) {
1915        const sp<AudioInputDescriptor>  inputDescriptor = mInputs.valueAt(i);
1916        if ((inputDescriptor->mInputSource == (int)source ||
1917                (source == AUDIO_SOURCE_VOICE_RECOGNITION &&
1918                 inputDescriptor->mInputSource == AUDIO_SOURCE_HOTWORD))
1919             && (inputDescriptor->mRefCount > 0)) {
1920            return true;
1921        }
1922    }
1923    return false;
1924}
1925
1926
1927status_t AudioPolicyManager::dump(int fd)
1928{
1929    const size_t SIZE = 256;
1930    char buffer[SIZE];
1931    String8 result;
1932
1933    snprintf(buffer, SIZE, "\nAudioPolicyManager Dump: %p\n", this);
1934    result.append(buffer);
1935
1936    snprintf(buffer, SIZE, " Primary Output: %d\n", mPrimaryOutput);
1937    result.append(buffer);
1938    snprintf(buffer, SIZE, " Phone state: %d\n", mPhoneState);
1939    result.append(buffer);
1940    snprintf(buffer, SIZE, " Force use for communications %d\n",
1941             mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION]);
1942    result.append(buffer);
1943    snprintf(buffer, SIZE, " Force use for media %d\n", mForceUse[AUDIO_POLICY_FORCE_FOR_MEDIA]);
1944    result.append(buffer);
1945    snprintf(buffer, SIZE, " Force use for record %d\n", mForceUse[AUDIO_POLICY_FORCE_FOR_RECORD]);
1946    result.append(buffer);
1947    snprintf(buffer, SIZE, " Force use for dock %d\n", mForceUse[AUDIO_POLICY_FORCE_FOR_DOCK]);
1948    result.append(buffer);
1949    snprintf(buffer, SIZE, " Force use for system %d\n", mForceUse[AUDIO_POLICY_FORCE_FOR_SYSTEM]);
1950    result.append(buffer);
1951    snprintf(buffer, SIZE, " Force use for hdmi system audio %d\n",
1952            mForceUse[AUDIO_POLICY_FORCE_FOR_HDMI_SYSTEM_AUDIO]);
1953    result.append(buffer);
1954
1955    snprintf(buffer, SIZE, " Available output devices:\n");
1956    result.append(buffer);
1957    write(fd, result.string(), result.size());
1958    for (size_t i = 0; i < mAvailableOutputDevices.size(); i++) {
1959        mAvailableOutputDevices[i]->dump(fd, 2, i);
1960    }
1961    snprintf(buffer, SIZE, "\n Available input devices:\n");
1962    write(fd, buffer, strlen(buffer));
1963    for (size_t i = 0; i < mAvailableInputDevices.size(); i++) {
1964        mAvailableInputDevices[i]->dump(fd, 2, i);
1965    }
1966
1967    snprintf(buffer, SIZE, "\nHW Modules dump:\n");
1968    write(fd, buffer, strlen(buffer));
1969    for (size_t i = 0; i < mHwModules.size(); i++) {
1970        snprintf(buffer, SIZE, "- HW Module %zu:\n", i + 1);
1971        write(fd, buffer, strlen(buffer));
1972        mHwModules[i]->dump(fd);
1973    }
1974
1975    snprintf(buffer, SIZE, "\nOutputs dump:\n");
1976    write(fd, buffer, strlen(buffer));
1977    for (size_t i = 0; i < mOutputs.size(); i++) {
1978        snprintf(buffer, SIZE, "- Output %d dump:\n", mOutputs.keyAt(i));
1979        write(fd, buffer, strlen(buffer));
1980        mOutputs.valueAt(i)->dump(fd);
1981    }
1982
1983    snprintf(buffer, SIZE, "\nInputs dump:\n");
1984    write(fd, buffer, strlen(buffer));
1985    for (size_t i = 0; i < mInputs.size(); i++) {
1986        snprintf(buffer, SIZE, "- Input %d dump:\n", mInputs.keyAt(i));
1987        write(fd, buffer, strlen(buffer));
1988        mInputs.valueAt(i)->dump(fd);
1989    }
1990
1991    snprintf(buffer, SIZE, "\nStreams dump:\n");
1992    write(fd, buffer, strlen(buffer));
1993    snprintf(buffer, SIZE,
1994             " Stream  Can be muted  Index Min  Index Max  Index Cur [device : index]...\n");
1995    write(fd, buffer, strlen(buffer));
1996    for (size_t i = 0; i < AUDIO_STREAM_CNT; i++) {
1997        snprintf(buffer, SIZE, " %02zu      ", i);
1998        write(fd, buffer, strlen(buffer));
1999        mStreams[i].dump(fd);
2000    }
2001
2002    snprintf(buffer, SIZE, "\nTotal Effects CPU: %f MIPS, Total Effects memory: %d KB\n",
2003            (float)mTotalEffectsCpuLoad/10, mTotalEffectsMemory);
2004    write(fd, buffer, strlen(buffer));
2005
2006    snprintf(buffer, SIZE, "Registered effects:\n");
2007    write(fd, buffer, strlen(buffer));
2008    for (size_t i = 0; i < mEffects.size(); i++) {
2009        snprintf(buffer, SIZE, "- Effect %d dump:\n", mEffects.keyAt(i));
2010        write(fd, buffer, strlen(buffer));
2011        mEffects.valueAt(i)->dump(fd);
2012    }
2013
2014    snprintf(buffer, SIZE, "\nAudio Patches:\n");
2015    write(fd, buffer, strlen(buffer));
2016    for (size_t i = 0; i < mAudioPatches.size(); i++) {
2017        mAudioPatches[i]->dump(fd, 2, i);
2018    }
2019
2020    return NO_ERROR;
2021}
2022
2023// This function checks for the parameters which can be offloaded.
2024// This can be enhanced depending on the capability of the DSP and policy
2025// of the system.
2026bool AudioPolicyManager::isOffloadSupported(const audio_offload_info_t& offloadInfo)
2027{
2028    ALOGV("isOffloadSupported: SR=%u, CM=0x%x, Format=0x%x, StreamType=%d,"
2029     " BitRate=%u, duration=%" PRId64 " us, has_video=%d",
2030     offloadInfo.sample_rate, offloadInfo.channel_mask,
2031     offloadInfo.format,
2032     offloadInfo.stream_type, offloadInfo.bit_rate, offloadInfo.duration_us,
2033     offloadInfo.has_video);
2034
2035    // Check if offload has been disabled
2036    char propValue[PROPERTY_VALUE_MAX];
2037    if (property_get("audio.offload.disable", propValue, "0")) {
2038        if (atoi(propValue) != 0) {
2039            ALOGV("offload disabled by audio.offload.disable=%s", propValue );
2040            return false;
2041        }
2042    }
2043
2044    // Check if stream type is music, then only allow offload as of now.
2045    if (offloadInfo.stream_type != AUDIO_STREAM_MUSIC)
2046    {
2047        ALOGV("isOffloadSupported: stream_type != MUSIC, returning false");
2048        return false;
2049    }
2050
2051    //TODO: enable audio offloading with video when ready
2052    if (offloadInfo.has_video)
2053    {
2054        ALOGV("isOffloadSupported: has_video == true, returning false");
2055        return false;
2056    }
2057
2058    //If duration is less than minimum value defined in property, return false
2059    if (property_get("audio.offload.min.duration.secs", propValue, NULL)) {
2060        if (offloadInfo.duration_us < (atoi(propValue) * 1000000 )) {
2061            ALOGV("Offload denied by duration < audio.offload.min.duration.secs(=%s)", propValue);
2062            return false;
2063        }
2064    } else if (offloadInfo.duration_us < OFFLOAD_DEFAULT_MIN_DURATION_SECS * 1000000) {
2065        ALOGV("Offload denied by duration < default min(=%u)", OFFLOAD_DEFAULT_MIN_DURATION_SECS);
2066        return false;
2067    }
2068
2069    // Do not allow offloading if one non offloadable effect is enabled. This prevents from
2070    // creating an offloaded track and tearing it down immediately after start when audioflinger
2071    // detects there is an active non offloadable effect.
2072    // FIXME: We should check the audio session here but we do not have it in this context.
2073    // This may prevent offloading in rare situations where effects are left active by apps
2074    // in the background.
2075    if (isNonOffloadableEffectEnabled()) {
2076        return false;
2077    }
2078
2079    // See if there is a profile to support this.
2080    // AUDIO_DEVICE_NONE
2081    sp<IOProfile> profile = getProfileForDirectOutput(AUDIO_DEVICE_NONE /*ignore device */,
2082                                            offloadInfo.sample_rate,
2083                                            offloadInfo.format,
2084                                            offloadInfo.channel_mask,
2085                                            AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD);
2086    ALOGV("isOffloadSupported() profile %sfound", profile != 0 ? "" : "NOT ");
2087    return (profile != 0);
2088}
2089
2090status_t AudioPolicyManager::listAudioPorts(audio_port_role_t role,
2091                                            audio_port_type_t type,
2092                                            unsigned int *num_ports,
2093                                            struct audio_port *ports,
2094                                            unsigned int *generation)
2095{
2096    if (num_ports == NULL || (*num_ports != 0 && ports == NULL) ||
2097            generation == NULL) {
2098        return BAD_VALUE;
2099    }
2100    ALOGV("listAudioPorts() role %d type %d num_ports %d ports %p", role, type, *num_ports, ports);
2101    if (ports == NULL) {
2102        *num_ports = 0;
2103    }
2104
2105    size_t portsWritten = 0;
2106    size_t portsMax = *num_ports;
2107    *num_ports = 0;
2108    if (type == AUDIO_PORT_TYPE_NONE || type == AUDIO_PORT_TYPE_DEVICE) {
2109        if (role == AUDIO_PORT_ROLE_SINK || role == AUDIO_PORT_ROLE_NONE) {
2110            for (size_t i = 0;
2111                    i  < mAvailableOutputDevices.size() && portsWritten < portsMax; i++) {
2112                mAvailableOutputDevices[i]->toAudioPort(&ports[portsWritten++]);
2113            }
2114            *num_ports += mAvailableOutputDevices.size();
2115        }
2116        if (role == AUDIO_PORT_ROLE_SOURCE || role == AUDIO_PORT_ROLE_NONE) {
2117            for (size_t i = 0;
2118                    i  < mAvailableInputDevices.size() && portsWritten < portsMax; i++) {
2119                mAvailableInputDevices[i]->toAudioPort(&ports[portsWritten++]);
2120            }
2121            *num_ports += mAvailableInputDevices.size();
2122        }
2123    }
2124    if (type == AUDIO_PORT_TYPE_NONE || type == AUDIO_PORT_TYPE_MIX) {
2125        if (role == AUDIO_PORT_ROLE_SINK || role == AUDIO_PORT_ROLE_NONE) {
2126            for (size_t i = 0; i < mInputs.size() && portsWritten < portsMax; i++) {
2127                mInputs[i]->toAudioPort(&ports[portsWritten++]);
2128            }
2129            *num_ports += mInputs.size();
2130        }
2131        if (role == AUDIO_PORT_ROLE_SOURCE || role == AUDIO_PORT_ROLE_NONE) {
2132            size_t numOutputs = 0;
2133            for (size_t i = 0; i < mOutputs.size(); i++) {
2134                if (!mOutputs[i]->isDuplicated()) {
2135                    numOutputs++;
2136                    if (portsWritten < portsMax) {
2137                        mOutputs[i]->toAudioPort(&ports[portsWritten++]);
2138                    }
2139                }
2140            }
2141            *num_ports += numOutputs;
2142        }
2143    }
2144    *generation = curAudioPortGeneration();
2145    ALOGV("listAudioPorts() got %zu ports needed %d", portsWritten, *num_ports);
2146    return NO_ERROR;
2147}
2148
2149status_t AudioPolicyManager::getAudioPort(struct audio_port *port __unused)
2150{
2151    return NO_ERROR;
2152}
2153
2154sp<AudioPolicyManager::AudioOutputDescriptor> AudioPolicyManager::getOutputFromId(
2155                                                                    audio_port_handle_t id) const
2156{
2157    sp<AudioOutputDescriptor> outputDesc = NULL;
2158    for (size_t i = 0; i < mOutputs.size(); i++) {
2159        outputDesc = mOutputs.valueAt(i);
2160        if (outputDesc->mId == id) {
2161            break;
2162        }
2163    }
2164    return outputDesc;
2165}
2166
2167sp<AudioPolicyManager::AudioInputDescriptor> AudioPolicyManager::getInputFromId(
2168                                                                    audio_port_handle_t id) const
2169{
2170    sp<AudioInputDescriptor> inputDesc = NULL;
2171    for (size_t i = 0; i < mInputs.size(); i++) {
2172        inputDesc = mInputs.valueAt(i);
2173        if (inputDesc->mId == id) {
2174            break;
2175        }
2176    }
2177    return inputDesc;
2178}
2179
2180sp <AudioPolicyManager::HwModule> AudioPolicyManager::getModuleForDevice(
2181                                                                    audio_devices_t device) const
2182{
2183    sp <HwModule> module;
2184
2185    for (size_t i = 0; i < mHwModules.size(); i++) {
2186        if (mHwModules[i]->mHandle == 0) {
2187            continue;
2188        }
2189        if (audio_is_output_device(device)) {
2190            for (size_t j = 0; j < mHwModules[i]->mOutputProfiles.size(); j++)
2191            {
2192                if (mHwModules[i]->mOutputProfiles[j]->mSupportedDevices.types() & device) {
2193                    return mHwModules[i];
2194                }
2195            }
2196        } else {
2197            for (size_t j = 0; j < mHwModules[i]->mInputProfiles.size(); j++) {
2198                if (mHwModules[i]->mInputProfiles[j]->mSupportedDevices.types() &
2199                        device & ~AUDIO_DEVICE_BIT_IN) {
2200                    return mHwModules[i];
2201                }
2202            }
2203        }
2204    }
2205    return module;
2206}
2207
2208sp <AudioPolicyManager::HwModule> AudioPolicyManager::getModuleFromName(const char *name) const
2209{
2210    sp <HwModule> module;
2211
2212    for (size_t i = 0; i < mHwModules.size(); i++)
2213    {
2214        if (strcmp(mHwModules[i]->mName, name) == 0) {
2215            return mHwModules[i];
2216        }
2217    }
2218    return module;
2219}
2220
2221audio_devices_t AudioPolicyManager::availablePrimaryOutputDevices()
2222{
2223    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(mPrimaryOutput);
2224    audio_devices_t devices = outputDesc->mProfile->mSupportedDevices.types();
2225    return devices & mAvailableOutputDevices.types();
2226}
2227
2228audio_devices_t AudioPolicyManager::availablePrimaryInputDevices()
2229{
2230    audio_module_handle_t primaryHandle =
2231                                mOutputs.valueFor(mPrimaryOutput)->mProfile->mModule->mHandle;
2232    audio_devices_t devices = AUDIO_DEVICE_NONE;
2233    for (size_t i = 0; i < mAvailableInputDevices.size(); i++) {
2234        if (mAvailableInputDevices[i]->mModule->mHandle == primaryHandle) {
2235            devices |= mAvailableInputDevices[i]->mDeviceType;
2236        }
2237    }
2238    return devices;
2239}
2240
2241status_t AudioPolicyManager::createAudioPatch(const struct audio_patch *patch,
2242                                               audio_patch_handle_t *handle,
2243                                               uid_t uid)
2244{
2245    ALOGV("createAudioPatch()");
2246
2247    if (handle == NULL || patch == NULL) {
2248        return BAD_VALUE;
2249    }
2250    ALOGV("createAudioPatch() num sources %d num sinks %d", patch->num_sources, patch->num_sinks);
2251
2252    if (patch->num_sources == 0 || patch->num_sources > AUDIO_PATCH_PORTS_MAX ||
2253            patch->num_sinks == 0 || patch->num_sinks > AUDIO_PATCH_PORTS_MAX) {
2254        return BAD_VALUE;
2255    }
2256    // only one source per audio patch supported for now
2257    if (patch->num_sources > 1) {
2258        return INVALID_OPERATION;
2259    }
2260
2261    if (patch->sources[0].role != AUDIO_PORT_ROLE_SOURCE) {
2262        return INVALID_OPERATION;
2263    }
2264    for (size_t i = 0; i < patch->num_sinks; i++) {
2265        if (patch->sinks[i].role != AUDIO_PORT_ROLE_SINK) {
2266            return INVALID_OPERATION;
2267        }
2268    }
2269
2270    sp<AudioPatch> patchDesc;
2271    ssize_t index = mAudioPatches.indexOfKey(*handle);
2272
2273    ALOGV("createAudioPatch source id %d role %d type %d", patch->sources[0].id,
2274                                                           patch->sources[0].role,
2275                                                           patch->sources[0].type);
2276#if LOG_NDEBUG == 0
2277    for (size_t i = 0; i < patch->num_sinks; i++) {
2278        ALOGV("createAudioPatch sink %d: id %d role %d type %d", i, patch->sinks[i].id,
2279                                                             patch->sinks[i].role,
2280                                                             patch->sinks[i].type);
2281    }
2282#endif
2283
2284    if (index >= 0) {
2285        patchDesc = mAudioPatches.valueAt(index);
2286        ALOGV("createAudioPatch() mUidCached %d patchDesc->mUid %d uid %d",
2287                                                                  mUidCached, patchDesc->mUid, uid);
2288        if (patchDesc->mUid != mUidCached && uid != patchDesc->mUid) {
2289            return INVALID_OPERATION;
2290        }
2291    } else {
2292        *handle = 0;
2293    }
2294
2295    if (patch->sources[0].type == AUDIO_PORT_TYPE_MIX) {
2296        sp<AudioOutputDescriptor> outputDesc = getOutputFromId(patch->sources[0].id);
2297        if (outputDesc == NULL) {
2298            ALOGV("createAudioPatch() output not found for id %d", patch->sources[0].id);
2299            return BAD_VALUE;
2300        }
2301        ALOG_ASSERT(!outputDesc->isDuplicated(),"duplicated output %d in source in ports",
2302                                                outputDesc->mIoHandle);
2303        if (patchDesc != 0) {
2304            if (patchDesc->mPatch.sources[0].id != patch->sources[0].id) {
2305                ALOGV("createAudioPatch() source id differs for patch current id %d new id %d",
2306                                          patchDesc->mPatch.sources[0].id, patch->sources[0].id);
2307                return BAD_VALUE;
2308            }
2309        }
2310        DeviceVector devices;
2311        for (size_t i = 0; i < patch->num_sinks; i++) {
2312            // Only support mix to devices connection
2313            // TODO add support for mix to mix connection
2314            if (patch->sinks[i].type != AUDIO_PORT_TYPE_DEVICE) {
2315                ALOGV("createAudioPatch() source mix but sink is not a device");
2316                return INVALID_OPERATION;
2317            }
2318            sp<DeviceDescriptor> devDesc =
2319                    mAvailableOutputDevices.getDeviceFromId(patch->sinks[i].id);
2320            if (devDesc == 0) {
2321                ALOGV("createAudioPatch() out device not found for id %d", patch->sinks[i].id);
2322                return BAD_VALUE;
2323            }
2324
2325            if (!outputDesc->mProfile->isCompatibleProfile(devDesc->mDeviceType,
2326                                                           patch->sources[0].sample_rate,
2327                                                         NULL,  // updatedSamplingRate
2328                                                         patch->sources[0].format,
2329                                                         patch->sources[0].channel_mask,
2330                                                         AUDIO_OUTPUT_FLAG_NONE /*FIXME*/)) {
2331                ALOGV("createAudioPatch() profile not supported for device %08x",
2332                      devDesc->mDeviceType);
2333                return INVALID_OPERATION;
2334            }
2335            devices.add(devDesc);
2336        }
2337        if (devices.size() == 0) {
2338            return INVALID_OPERATION;
2339        }
2340
2341        // TODO: reconfigure output format and channels here
2342        ALOGV("createAudioPatch() setting device %08x on output %d",
2343              devices.types(), outputDesc->mIoHandle);
2344        setOutputDevice(outputDesc->mIoHandle, devices.types(), true, 0, handle);
2345        index = mAudioPatches.indexOfKey(*handle);
2346        if (index >= 0) {
2347            if (patchDesc != 0 && patchDesc != mAudioPatches.valueAt(index)) {
2348                ALOGW("createAudioPatch() setOutputDevice() did not reuse the patch provided");
2349            }
2350            patchDesc = mAudioPatches.valueAt(index);
2351            patchDesc->mUid = uid;
2352            ALOGV("createAudioPatch() success");
2353        } else {
2354            ALOGW("createAudioPatch() setOutputDevice() failed to create a patch");
2355            return INVALID_OPERATION;
2356        }
2357    } else if (patch->sources[0].type == AUDIO_PORT_TYPE_DEVICE) {
2358        if (patch->sinks[0].type == AUDIO_PORT_TYPE_MIX) {
2359            // input device to input mix connection
2360            // only one sink supported when connecting an input device to a mix
2361            if (patch->num_sinks > 1) {
2362                return INVALID_OPERATION;
2363            }
2364            sp<AudioInputDescriptor> inputDesc = getInputFromId(patch->sinks[0].id);
2365            if (inputDesc == NULL) {
2366                return BAD_VALUE;
2367            }
2368            if (patchDesc != 0) {
2369                if (patchDesc->mPatch.sinks[0].id != patch->sinks[0].id) {
2370                    return BAD_VALUE;
2371                }
2372            }
2373            sp<DeviceDescriptor> devDesc =
2374                    mAvailableInputDevices.getDeviceFromId(patch->sources[0].id);
2375            if (devDesc == 0) {
2376                return BAD_VALUE;
2377            }
2378
2379            if (!inputDesc->mProfile->isCompatibleProfile(devDesc->mDeviceType,
2380                                                         patch->sinks[0].sample_rate,
2381                                                         NULL, /*updatedSampleRate*/
2382                                                         patch->sinks[0].format,
2383                                                         patch->sinks[0].channel_mask,
2384                                                         // FIXME for the parameter type,
2385                                                         // and the NONE
2386                                                         (audio_output_flags_t)
2387                                                            AUDIO_INPUT_FLAG_NONE)) {
2388                return INVALID_OPERATION;
2389            }
2390            // TODO: reconfigure output format and channels here
2391            ALOGV("createAudioPatch() setting device %08x on output %d",
2392                                                  devDesc->mDeviceType, inputDesc->mIoHandle);
2393            setInputDevice(inputDesc->mIoHandle, devDesc->mDeviceType, true, handle);
2394            index = mAudioPatches.indexOfKey(*handle);
2395            if (index >= 0) {
2396                if (patchDesc != 0 && patchDesc != mAudioPatches.valueAt(index)) {
2397                    ALOGW("createAudioPatch() setInputDevice() did not reuse the patch provided");
2398                }
2399                patchDesc = mAudioPatches.valueAt(index);
2400                patchDesc->mUid = uid;
2401                ALOGV("createAudioPatch() success");
2402            } else {
2403                ALOGW("createAudioPatch() setInputDevice() failed to create a patch");
2404                return INVALID_OPERATION;
2405            }
2406        } else if (patch->sinks[0].type == AUDIO_PORT_TYPE_DEVICE) {
2407            // device to device connection
2408            if (patchDesc != 0) {
2409                if (patchDesc->mPatch.sources[0].id != patch->sources[0].id) {
2410                    return BAD_VALUE;
2411                }
2412            }
2413            sp<DeviceDescriptor> srcDeviceDesc =
2414                    mAvailableInputDevices.getDeviceFromId(patch->sources[0].id);
2415            if (srcDeviceDesc == 0) {
2416                return BAD_VALUE;
2417            }
2418
2419            //update source and sink with our own data as the data passed in the patch may
2420            // be incomplete.
2421            struct audio_patch newPatch = *patch;
2422            srcDeviceDesc->toAudioPortConfig(&newPatch.sources[0], &patch->sources[0]);
2423
2424            for (size_t i = 0; i < patch->num_sinks; i++) {
2425                if (patch->sinks[i].type != AUDIO_PORT_TYPE_DEVICE) {
2426                    ALOGV("createAudioPatch() source device but one sink is not a device");
2427                    return INVALID_OPERATION;
2428                }
2429
2430                sp<DeviceDescriptor> sinkDeviceDesc =
2431                        mAvailableOutputDevices.getDeviceFromId(patch->sinks[i].id);
2432                if (sinkDeviceDesc == 0) {
2433                    return BAD_VALUE;
2434                }
2435                sinkDeviceDesc->toAudioPortConfig(&newPatch.sinks[i], &patch->sinks[i]);
2436
2437                if (srcDeviceDesc->mModule != sinkDeviceDesc->mModule) {
2438                    // only one sink supported when connected devices across HW modules
2439                    if (patch->num_sinks > 1) {
2440                        return INVALID_OPERATION;
2441                    }
2442                    SortedVector<audio_io_handle_t> outputs =
2443                                            getOutputsForDevice(sinkDeviceDesc->mDeviceType,
2444                                                                mOutputs);
2445                    // if the sink device is reachable via an opened output stream, request to go via
2446                    // this output stream by adding a second source to the patch description
2447                    audio_io_handle_t output = selectOutput(outputs,
2448                                                            AUDIO_OUTPUT_FLAG_NONE,
2449                                                            AUDIO_FORMAT_INVALID);
2450                    if (output != AUDIO_IO_HANDLE_NONE) {
2451                        sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
2452                        if (outputDesc->isDuplicated()) {
2453                            return INVALID_OPERATION;
2454                        }
2455                        outputDesc->toAudioPortConfig(&newPatch.sources[1], &patch->sources[0]);
2456                        newPatch.num_sources = 2;
2457                    }
2458                }
2459            }
2460            // TODO: check from routing capabilities in config file and other conflicting patches
2461
2462            audio_patch_handle_t afPatchHandle = AUDIO_PATCH_HANDLE_NONE;
2463            if (index >= 0) {
2464                afPatchHandle = patchDesc->mAfPatchHandle;
2465            }
2466
2467            status_t status = mpClientInterface->createAudioPatch(&newPatch,
2468                                                                  &afPatchHandle,
2469                                                                  0);
2470            ALOGV("createAudioPatch() patch panel returned %d patchHandle %d",
2471                                                                  status, afPatchHandle);
2472            if (status == NO_ERROR) {
2473                if (index < 0) {
2474                    patchDesc = new AudioPatch((audio_patch_handle_t)nextUniqueId(),
2475                                               &newPatch, uid);
2476                    addAudioPatch(patchDesc->mHandle, patchDesc);
2477                } else {
2478                    patchDesc->mPatch = newPatch;
2479                }
2480                patchDesc->mAfPatchHandle = afPatchHandle;
2481                *handle = patchDesc->mHandle;
2482                nextAudioPortGeneration();
2483                mpClientInterface->onAudioPatchListUpdate();
2484            } else {
2485                ALOGW("createAudioPatch() patch panel could not connect device patch, error %d",
2486                status);
2487                return INVALID_OPERATION;
2488            }
2489        } else {
2490            return BAD_VALUE;
2491        }
2492    } else {
2493        return BAD_VALUE;
2494    }
2495    return NO_ERROR;
2496}
2497
2498status_t AudioPolicyManager::releaseAudioPatch(audio_patch_handle_t handle,
2499                                                  uid_t uid)
2500{
2501    ALOGV("releaseAudioPatch() patch %d", handle);
2502
2503    ssize_t index = mAudioPatches.indexOfKey(handle);
2504
2505    if (index < 0) {
2506        return BAD_VALUE;
2507    }
2508    sp<AudioPatch> patchDesc = mAudioPatches.valueAt(index);
2509    ALOGV("releaseAudioPatch() mUidCached %d patchDesc->mUid %d uid %d",
2510          mUidCached, patchDesc->mUid, uid);
2511    if (patchDesc->mUid != mUidCached && uid != patchDesc->mUid) {
2512        return INVALID_OPERATION;
2513    }
2514
2515    struct audio_patch *patch = &patchDesc->mPatch;
2516    patchDesc->mUid = mUidCached;
2517    if (patch->sources[0].type == AUDIO_PORT_TYPE_MIX) {
2518        sp<AudioOutputDescriptor> outputDesc = getOutputFromId(patch->sources[0].id);
2519        if (outputDesc == NULL) {
2520            ALOGV("releaseAudioPatch() output not found for id %d", patch->sources[0].id);
2521            return BAD_VALUE;
2522        }
2523
2524        setOutputDevice(outputDesc->mIoHandle,
2525                        getNewOutputDevice(outputDesc->mIoHandle, true /*fromCache*/),
2526                       true,
2527                       0,
2528                       NULL);
2529    } else if (patch->sources[0].type == AUDIO_PORT_TYPE_DEVICE) {
2530        if (patch->sinks[0].type == AUDIO_PORT_TYPE_MIX) {
2531            sp<AudioInputDescriptor> inputDesc = getInputFromId(patch->sinks[0].id);
2532            if (inputDesc == NULL) {
2533                ALOGV("releaseAudioPatch() input not found for id %d", patch->sinks[0].id);
2534                return BAD_VALUE;
2535            }
2536            setInputDevice(inputDesc->mIoHandle,
2537                           getNewInputDevice(inputDesc->mIoHandle),
2538                           true,
2539                           NULL);
2540        } else if (patch->sinks[0].type == AUDIO_PORT_TYPE_DEVICE) {
2541            audio_patch_handle_t afPatchHandle = patchDesc->mAfPatchHandle;
2542            status_t status = mpClientInterface->releaseAudioPatch(patchDesc->mAfPatchHandle, 0);
2543            ALOGV("releaseAudioPatch() patch panel returned %d patchHandle %d",
2544                                                              status, patchDesc->mAfPatchHandle);
2545            removeAudioPatch(patchDesc->mHandle);
2546            nextAudioPortGeneration();
2547            mpClientInterface->onAudioPatchListUpdate();
2548        } else {
2549            return BAD_VALUE;
2550        }
2551    } else {
2552        return BAD_VALUE;
2553    }
2554    return NO_ERROR;
2555}
2556
2557status_t AudioPolicyManager::listAudioPatches(unsigned int *num_patches,
2558                                              struct audio_patch *patches,
2559                                              unsigned int *generation)
2560{
2561    if (num_patches == NULL || (*num_patches != 0 && patches == NULL) ||
2562            generation == NULL) {
2563        return BAD_VALUE;
2564    }
2565    ALOGV("listAudioPatches() num_patches %d patches %p available patches %zu",
2566          *num_patches, patches, mAudioPatches.size());
2567    if (patches == NULL) {
2568        *num_patches = 0;
2569    }
2570
2571    size_t patchesWritten = 0;
2572    size_t patchesMax = *num_patches;
2573    for (size_t i = 0;
2574            i  < mAudioPatches.size() && patchesWritten < patchesMax; i++) {
2575        patches[patchesWritten] = mAudioPatches[i]->mPatch;
2576        patches[patchesWritten++].id = mAudioPatches[i]->mHandle;
2577        ALOGV("listAudioPatches() patch %zu num_sources %d num_sinks %d",
2578              i, mAudioPatches[i]->mPatch.num_sources, mAudioPatches[i]->mPatch.num_sinks);
2579    }
2580    *num_patches = mAudioPatches.size();
2581
2582    *generation = curAudioPortGeneration();
2583    ALOGV("listAudioPatches() got %zu patches needed %d", patchesWritten, *num_patches);
2584    return NO_ERROR;
2585}
2586
2587status_t AudioPolicyManager::setAudioPortConfig(const struct audio_port_config *config)
2588{
2589    ALOGV("setAudioPortConfig()");
2590
2591    if (config == NULL) {
2592        return BAD_VALUE;
2593    }
2594    ALOGV("setAudioPortConfig() on port handle %d", config->id);
2595    // Only support gain configuration for now
2596    if (config->config_mask != AUDIO_PORT_CONFIG_GAIN) {
2597        return INVALID_OPERATION;
2598    }
2599
2600    sp<AudioPortConfig> audioPortConfig;
2601    if (config->type == AUDIO_PORT_TYPE_MIX) {
2602        if (config->role == AUDIO_PORT_ROLE_SOURCE) {
2603            sp<AudioOutputDescriptor> outputDesc = getOutputFromId(config->id);
2604            if (outputDesc == NULL) {
2605                return BAD_VALUE;
2606            }
2607            ALOG_ASSERT(!outputDesc->isDuplicated(),
2608                        "setAudioPortConfig() called on duplicated output %d",
2609                        outputDesc->mIoHandle);
2610            audioPortConfig = outputDesc;
2611        } else if (config->role == AUDIO_PORT_ROLE_SINK) {
2612            sp<AudioInputDescriptor> inputDesc = getInputFromId(config->id);
2613            if (inputDesc == NULL) {
2614                return BAD_VALUE;
2615            }
2616            audioPortConfig = inputDesc;
2617        } else {
2618            return BAD_VALUE;
2619        }
2620    } else if (config->type == AUDIO_PORT_TYPE_DEVICE) {
2621        sp<DeviceDescriptor> deviceDesc;
2622        if (config->role == AUDIO_PORT_ROLE_SOURCE) {
2623            deviceDesc = mAvailableInputDevices.getDeviceFromId(config->id);
2624        } else if (config->role == AUDIO_PORT_ROLE_SINK) {
2625            deviceDesc = mAvailableOutputDevices.getDeviceFromId(config->id);
2626        } else {
2627            return BAD_VALUE;
2628        }
2629        if (deviceDesc == NULL) {
2630            return BAD_VALUE;
2631        }
2632        audioPortConfig = deviceDesc;
2633    } else {
2634        return BAD_VALUE;
2635    }
2636
2637    struct audio_port_config backupConfig;
2638    status_t status = audioPortConfig->applyAudioPortConfig(config, &backupConfig);
2639    if (status == NO_ERROR) {
2640        struct audio_port_config newConfig;
2641        audioPortConfig->toAudioPortConfig(&newConfig, config);
2642        status = mpClientInterface->setAudioPortConfig(&newConfig, 0);
2643    }
2644    if (status != NO_ERROR) {
2645        audioPortConfig->applyAudioPortConfig(&backupConfig);
2646    }
2647
2648    return status;
2649}
2650
2651void AudioPolicyManager::clearAudioPatches(uid_t uid)
2652{
2653    for (ssize_t i = (ssize_t)mAudioPatches.size() - 1; i >= 0; i--)  {
2654        sp<AudioPatch> patchDesc = mAudioPatches.valueAt(i);
2655        if (patchDesc->mUid == uid) {
2656            releaseAudioPatch(mAudioPatches.keyAt(i), uid);
2657        }
2658    }
2659}
2660
2661status_t AudioPolicyManager::acquireSoundTriggerSession(audio_session_t *session,
2662                                       audio_io_handle_t *ioHandle,
2663                                       audio_devices_t *device)
2664{
2665    *session = (audio_session_t)mpClientInterface->newAudioUniqueId();
2666    *ioHandle = (audio_io_handle_t)mpClientInterface->newAudioUniqueId();
2667    *device = getDeviceForInputSource(AUDIO_SOURCE_HOTWORD);
2668
2669    mSoundTriggerSessions.add(*session, *ioHandle);
2670
2671    return NO_ERROR;
2672}
2673
2674status_t AudioPolicyManager::releaseSoundTriggerSession(audio_session_t session)
2675{
2676    ssize_t index = mSoundTriggerSessions.indexOfKey(session);
2677    if (index < 0) {
2678        ALOGW("acquireSoundTriggerSession() session %d not registered", session);
2679        return BAD_VALUE;
2680    }
2681
2682    mSoundTriggerSessions.removeItem(session);
2683    return NO_ERROR;
2684}
2685
2686status_t AudioPolicyManager::addAudioPatch(audio_patch_handle_t handle,
2687                                           const sp<AudioPatch>& patch)
2688{
2689    ssize_t index = mAudioPatches.indexOfKey(handle);
2690
2691    if (index >= 0) {
2692        ALOGW("addAudioPatch() patch %d already in", handle);
2693        return ALREADY_EXISTS;
2694    }
2695    mAudioPatches.add(handle, patch);
2696    ALOGV("addAudioPatch() handle %d af handle %d num_sources %d num_sinks %d source handle %d"
2697            "sink handle %d",
2698          handle, patch->mAfPatchHandle, patch->mPatch.num_sources, patch->mPatch.num_sinks,
2699          patch->mPatch.sources[0].id, patch->mPatch.sinks[0].id);
2700    return NO_ERROR;
2701}
2702
2703status_t AudioPolicyManager::removeAudioPatch(audio_patch_handle_t handle)
2704{
2705    ssize_t index = mAudioPatches.indexOfKey(handle);
2706
2707    if (index < 0) {
2708        ALOGW("removeAudioPatch() patch %d not in", handle);
2709        return ALREADY_EXISTS;
2710    }
2711    ALOGV("removeAudioPatch() handle %d af handle %d", handle,
2712                      mAudioPatches.valueAt(index)->mAfPatchHandle);
2713    mAudioPatches.removeItemsAt(index);
2714    return NO_ERROR;
2715}
2716
2717// ----------------------------------------------------------------------------
2718// AudioPolicyManager
2719// ----------------------------------------------------------------------------
2720
2721uint32_t AudioPolicyManager::nextUniqueId()
2722{
2723    return android_atomic_inc(&mNextUniqueId);
2724}
2725
2726uint32_t AudioPolicyManager::nextAudioPortGeneration()
2727{
2728    return android_atomic_inc(&mAudioPortGeneration);
2729}
2730
2731AudioPolicyManager::AudioPolicyManager(AudioPolicyClientInterface *clientInterface)
2732    :
2733#ifdef AUDIO_POLICY_TEST
2734    Thread(false),
2735#endif //AUDIO_POLICY_TEST
2736    mPrimaryOutput((audio_io_handle_t)0),
2737    mPhoneState(AUDIO_MODE_NORMAL),
2738    mLimitRingtoneVolume(false), mLastVoiceVolume(-1.0f),
2739    mTotalEffectsCpuLoad(0), mTotalEffectsMemory(0),
2740    mA2dpSuspended(false),
2741    mSpeakerDrcEnabled(false), mNextUniqueId(1),
2742    mAudioPortGeneration(1),
2743    mBeaconMuteRefCount(0),
2744    mBeaconPlayingRefCount(0),
2745    mBeaconMuted(false)
2746{
2747    mUidCached = getuid();
2748    mpClientInterface = clientInterface;
2749
2750    for (int i = 0; i < AUDIO_POLICY_FORCE_USE_CNT; i++) {
2751        mForceUse[i] = AUDIO_POLICY_FORCE_NONE;
2752    }
2753
2754    mDefaultOutputDevice = new DeviceDescriptor(String8(""), AUDIO_DEVICE_OUT_SPEAKER);
2755    if (loadAudioPolicyConfig(AUDIO_POLICY_VENDOR_CONFIG_FILE) != NO_ERROR) {
2756        if (loadAudioPolicyConfig(AUDIO_POLICY_CONFIG_FILE) != NO_ERROR) {
2757            ALOGE("could not load audio policy configuration file, setting defaults");
2758            defaultAudioPolicyConfig();
2759        }
2760    }
2761    // mAvailableOutputDevices and mAvailableInputDevices now contain all attached devices
2762
2763    // must be done after reading the policy
2764    initializeVolumeCurves();
2765
2766    // open all output streams needed to access attached devices
2767    audio_devices_t outputDeviceTypes = mAvailableOutputDevices.types();
2768    audio_devices_t inputDeviceTypes = mAvailableInputDevices.types() & ~AUDIO_DEVICE_BIT_IN;
2769    for (size_t i = 0; i < mHwModules.size(); i++) {
2770        mHwModules[i]->mHandle = mpClientInterface->loadHwModule(mHwModules[i]->mName);
2771        if (mHwModules[i]->mHandle == 0) {
2772            ALOGW("could not open HW module %s", mHwModules[i]->mName);
2773            continue;
2774        }
2775        // open all output streams needed to access attached devices
2776        // except for direct output streams that are only opened when they are actually
2777        // required by an app.
2778        // This also validates mAvailableOutputDevices list
2779        for (size_t j = 0; j < mHwModules[i]->mOutputProfiles.size(); j++)
2780        {
2781            const sp<IOProfile> outProfile = mHwModules[i]->mOutputProfiles[j];
2782
2783            if (outProfile->mSupportedDevices.isEmpty()) {
2784                ALOGW("Output profile contains no device on module %s", mHwModules[i]->mName);
2785                continue;
2786            }
2787
2788            if ((outProfile->mFlags & AUDIO_OUTPUT_FLAG_DIRECT) != 0) {
2789                continue;
2790            }
2791            audio_devices_t profileType = outProfile->mSupportedDevices.types();
2792            if ((profileType & mDefaultOutputDevice->mDeviceType) != AUDIO_DEVICE_NONE) {
2793                profileType = mDefaultOutputDevice->mDeviceType;
2794            } else {
2795                // chose first device present in mSupportedDevices also part of
2796                // outputDeviceTypes
2797                for (size_t k = 0; k  < outProfile->mSupportedDevices.size(); k++) {
2798                    profileType = outProfile->mSupportedDevices[k]->mDeviceType;
2799                    if ((profileType & outputDeviceTypes) != 0) {
2800                        break;
2801                    }
2802                }
2803            }
2804            if ((profileType & outputDeviceTypes) == 0) {
2805                continue;
2806            }
2807            sp<AudioOutputDescriptor> outputDesc = new AudioOutputDescriptor(outProfile);
2808
2809            outputDesc->mDevice = profileType;
2810            audio_config_t config = AUDIO_CONFIG_INITIALIZER;
2811            config.sample_rate = outputDesc->mSamplingRate;
2812            config.channel_mask = outputDesc->mChannelMask;
2813            config.format = outputDesc->mFormat;
2814            audio_io_handle_t output = AUDIO_IO_HANDLE_NONE;
2815            status_t status = mpClientInterface->openOutput(outProfile->mModule->mHandle,
2816                                                            &output,
2817                                                            &config,
2818                                                            &outputDesc->mDevice,
2819                                                            String8(""),
2820                                                            &outputDesc->mLatency,
2821                                                            outputDesc->mFlags);
2822
2823            if (status != NO_ERROR) {
2824                ALOGW("Cannot open output stream for device %08x on hw module %s",
2825                      outputDesc->mDevice,
2826                      mHwModules[i]->mName);
2827            } else {
2828                outputDesc->mSamplingRate = config.sample_rate;
2829                outputDesc->mChannelMask = config.channel_mask;
2830                outputDesc->mFormat = config.format;
2831
2832                for (size_t k = 0; k  < outProfile->mSupportedDevices.size(); k++) {
2833                    audio_devices_t type = outProfile->mSupportedDevices[k]->mDeviceType;
2834                    ssize_t index =
2835                            mAvailableOutputDevices.indexOf(outProfile->mSupportedDevices[k]);
2836                    // give a valid ID to an attached device once confirmed it is reachable
2837                    if ((index >= 0) && (mAvailableOutputDevices[index]->mId == 0)) {
2838                        mAvailableOutputDevices[index]->mId = nextUniqueId();
2839                        mAvailableOutputDevices[index]->mModule = mHwModules[i];
2840                    }
2841                }
2842                if (mPrimaryOutput == 0 &&
2843                        outProfile->mFlags & AUDIO_OUTPUT_FLAG_PRIMARY) {
2844                    mPrimaryOutput = output;
2845                }
2846                addOutput(output, outputDesc);
2847                setOutputDevice(output,
2848                                outputDesc->mDevice,
2849                                true);
2850            }
2851        }
2852        // open input streams needed to access attached devices to validate
2853        // mAvailableInputDevices list
2854        for (size_t j = 0; j < mHwModules[i]->mInputProfiles.size(); j++)
2855        {
2856            const sp<IOProfile> inProfile = mHwModules[i]->mInputProfiles[j];
2857
2858            if (inProfile->mSupportedDevices.isEmpty()) {
2859                ALOGW("Input profile contains no device on module %s", mHwModules[i]->mName);
2860                continue;
2861            }
2862            // chose first device present in mSupportedDevices also part of
2863            // inputDeviceTypes
2864            audio_devices_t profileType = AUDIO_DEVICE_NONE;
2865            for (size_t k = 0; k  < inProfile->mSupportedDevices.size(); k++) {
2866                profileType = inProfile->mSupportedDevices[k]->mDeviceType;
2867                if (profileType & inputDeviceTypes) {
2868                    break;
2869                }
2870            }
2871            if ((profileType & inputDeviceTypes) == 0) {
2872                continue;
2873            }
2874            sp<AudioInputDescriptor> inputDesc = new AudioInputDescriptor(inProfile);
2875
2876            inputDesc->mInputSource = AUDIO_SOURCE_MIC;
2877            inputDesc->mDevice = profileType;
2878
2879            // find the address
2880            DeviceVector inputDevices = mAvailableInputDevices.getDevicesFromType(profileType);
2881            //   the inputs vector must be of size 1, but we don't want to crash here
2882            String8 address = inputDevices.size() > 0 ? inputDevices.itemAt(0)->mAddress
2883                    : String8("");
2884            ALOGV("  for input device 0x%x using address %s", profileType, address.string());
2885            ALOGE_IF(inputDevices.size() == 0, "Input device list is empty!");
2886
2887            audio_config_t config = AUDIO_CONFIG_INITIALIZER;
2888            config.sample_rate = inputDesc->mSamplingRate;
2889            config.channel_mask = inputDesc->mChannelMask;
2890            config.format = inputDesc->mFormat;
2891            audio_io_handle_t input = AUDIO_IO_HANDLE_NONE;
2892            status_t status = mpClientInterface->openInput(inProfile->mModule->mHandle,
2893                                                           &input,
2894                                                           &config,
2895                                                           &inputDesc->mDevice,
2896                                                           address,
2897                                                           AUDIO_SOURCE_MIC,
2898                                                           AUDIO_INPUT_FLAG_NONE);
2899
2900            if (status == NO_ERROR) {
2901                for (size_t k = 0; k  < inProfile->mSupportedDevices.size(); k++) {
2902                    audio_devices_t type = inProfile->mSupportedDevices[k]->mDeviceType;
2903                    ssize_t index =
2904                            mAvailableInputDevices.indexOf(inProfile->mSupportedDevices[k]);
2905                    // give a valid ID to an attached device once confirmed it is reachable
2906                    if ((index >= 0) && (mAvailableInputDevices[index]->mId == 0)) {
2907                        mAvailableInputDevices[index]->mId = nextUniqueId();
2908                        mAvailableInputDevices[index]->mModule = mHwModules[i];
2909                    }
2910                }
2911                mpClientInterface->closeInput(input);
2912            } else {
2913                ALOGW("Cannot open input stream for device %08x on hw module %s",
2914                      inputDesc->mDevice,
2915                      mHwModules[i]->mName);
2916            }
2917        }
2918    }
2919    // make sure all attached devices have been allocated a unique ID
2920    for (size_t i = 0; i  < mAvailableOutputDevices.size();) {
2921        if (mAvailableOutputDevices[i]->mId == 0) {
2922            ALOGW("Input device %08x unreachable", mAvailableOutputDevices[i]->mDeviceType);
2923            mAvailableOutputDevices.remove(mAvailableOutputDevices[i]);
2924            continue;
2925        }
2926        i++;
2927    }
2928    for (size_t i = 0; i  < mAvailableInputDevices.size();) {
2929        if (mAvailableInputDevices[i]->mId == 0) {
2930            ALOGW("Input device %08x unreachable", mAvailableInputDevices[i]->mDeviceType);
2931            mAvailableInputDevices.remove(mAvailableInputDevices[i]);
2932            continue;
2933        }
2934        i++;
2935    }
2936    // make sure default device is reachable
2937    if (mAvailableOutputDevices.indexOf(mDefaultOutputDevice) < 0) {
2938        ALOGE("Default device %08x is unreachable", mDefaultOutputDevice->mDeviceType);
2939    }
2940
2941    ALOGE_IF((mPrimaryOutput == 0), "Failed to open primary output");
2942
2943    updateDevicesAndOutputs();
2944
2945#ifdef AUDIO_POLICY_TEST
2946    if (mPrimaryOutput != 0) {
2947        AudioParameter outputCmd = AudioParameter();
2948        outputCmd.addInt(String8("set_id"), 0);
2949        mpClientInterface->setParameters(mPrimaryOutput, outputCmd.toString());
2950
2951        mTestDevice = AUDIO_DEVICE_OUT_SPEAKER;
2952        mTestSamplingRate = 44100;
2953        mTestFormat = AUDIO_FORMAT_PCM_16_BIT;
2954        mTestChannels =  AUDIO_CHANNEL_OUT_STEREO;
2955        mTestLatencyMs = 0;
2956        mCurOutput = 0;
2957        mDirectOutput = false;
2958        for (int i = 0; i < NUM_TEST_OUTPUTS; i++) {
2959            mTestOutputs[i] = 0;
2960        }
2961
2962        const size_t SIZE = 256;
2963        char buffer[SIZE];
2964        snprintf(buffer, SIZE, "AudioPolicyManagerTest");
2965        run(buffer, ANDROID_PRIORITY_AUDIO);
2966    }
2967#endif //AUDIO_POLICY_TEST
2968}
2969
2970AudioPolicyManager::~AudioPolicyManager()
2971{
2972#ifdef AUDIO_POLICY_TEST
2973    exit();
2974#endif //AUDIO_POLICY_TEST
2975   for (size_t i = 0; i < mOutputs.size(); i++) {
2976        mpClientInterface->closeOutput(mOutputs.keyAt(i));
2977   }
2978   for (size_t i = 0; i < mInputs.size(); i++) {
2979        mpClientInterface->closeInput(mInputs.keyAt(i));
2980   }
2981   mAvailableOutputDevices.clear();
2982   mAvailableInputDevices.clear();
2983   mOutputs.clear();
2984   mInputs.clear();
2985   mHwModules.clear();
2986}
2987
2988status_t AudioPolicyManager::initCheck()
2989{
2990    return (mPrimaryOutput == 0) ? NO_INIT : NO_ERROR;
2991}
2992
2993#ifdef AUDIO_POLICY_TEST
2994bool AudioPolicyManager::threadLoop()
2995{
2996    ALOGV("entering threadLoop()");
2997    while (!exitPending())
2998    {
2999        String8 command;
3000        int valueInt;
3001        String8 value;
3002
3003        Mutex::Autolock _l(mLock);
3004        mWaitWorkCV.waitRelative(mLock, milliseconds(50));
3005
3006        command = mpClientInterface->getParameters(0, String8("test_cmd_policy"));
3007        AudioParameter param = AudioParameter(command);
3008
3009        if (param.getInt(String8("test_cmd_policy"), valueInt) == NO_ERROR &&
3010            valueInt != 0) {
3011            ALOGV("Test command %s received", command.string());
3012            String8 target;
3013            if (param.get(String8("target"), target) != NO_ERROR) {
3014                target = "Manager";
3015            }
3016            if (param.getInt(String8("test_cmd_policy_output"), valueInt) == NO_ERROR) {
3017                param.remove(String8("test_cmd_policy_output"));
3018                mCurOutput = valueInt;
3019            }
3020            if (param.get(String8("test_cmd_policy_direct"), value) == NO_ERROR) {
3021                param.remove(String8("test_cmd_policy_direct"));
3022                if (value == "false") {
3023                    mDirectOutput = false;
3024                } else if (value == "true") {
3025                    mDirectOutput = true;
3026                }
3027            }
3028            if (param.getInt(String8("test_cmd_policy_input"), valueInt) == NO_ERROR) {
3029                param.remove(String8("test_cmd_policy_input"));
3030                mTestInput = valueInt;
3031            }
3032
3033            if (param.get(String8("test_cmd_policy_format"), value) == NO_ERROR) {
3034                param.remove(String8("test_cmd_policy_format"));
3035                int format = AUDIO_FORMAT_INVALID;
3036                if (value == "PCM 16 bits") {
3037                    format = AUDIO_FORMAT_PCM_16_BIT;
3038                } else if (value == "PCM 8 bits") {
3039                    format = AUDIO_FORMAT_PCM_8_BIT;
3040                } else if (value == "Compressed MP3") {
3041                    format = AUDIO_FORMAT_MP3;
3042                }
3043                if (format != AUDIO_FORMAT_INVALID) {
3044                    if (target == "Manager") {
3045                        mTestFormat = format;
3046                    } else if (mTestOutputs[mCurOutput] != 0) {
3047                        AudioParameter outputParam = AudioParameter();
3048                        outputParam.addInt(String8("format"), format);
3049                        mpClientInterface->setParameters(mTestOutputs[mCurOutput], outputParam.toString());
3050                    }
3051                }
3052            }
3053            if (param.get(String8("test_cmd_policy_channels"), value) == NO_ERROR) {
3054                param.remove(String8("test_cmd_policy_channels"));
3055                int channels = 0;
3056
3057                if (value == "Channels Stereo") {
3058                    channels =  AUDIO_CHANNEL_OUT_STEREO;
3059                } else if (value == "Channels Mono") {
3060                    channels =  AUDIO_CHANNEL_OUT_MONO;
3061                }
3062                if (channels != 0) {
3063                    if (target == "Manager") {
3064                        mTestChannels = channels;
3065                    } else if (mTestOutputs[mCurOutput] != 0) {
3066                        AudioParameter outputParam = AudioParameter();
3067                        outputParam.addInt(String8("channels"), channels);
3068                        mpClientInterface->setParameters(mTestOutputs[mCurOutput], outputParam.toString());
3069                    }
3070                }
3071            }
3072            if (param.getInt(String8("test_cmd_policy_sampleRate"), valueInt) == NO_ERROR) {
3073                param.remove(String8("test_cmd_policy_sampleRate"));
3074                if (valueInt >= 0 && valueInt <= 96000) {
3075                    int samplingRate = valueInt;
3076                    if (target == "Manager") {
3077                        mTestSamplingRate = samplingRate;
3078                    } else if (mTestOutputs[mCurOutput] != 0) {
3079                        AudioParameter outputParam = AudioParameter();
3080                        outputParam.addInt(String8("sampling_rate"), samplingRate);
3081                        mpClientInterface->setParameters(mTestOutputs[mCurOutput], outputParam.toString());
3082                    }
3083                }
3084            }
3085
3086            if (param.get(String8("test_cmd_policy_reopen"), value) == NO_ERROR) {
3087                param.remove(String8("test_cmd_policy_reopen"));
3088
3089                sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(mPrimaryOutput);
3090                mpClientInterface->closeOutput(mPrimaryOutput);
3091
3092                audio_module_handle_t moduleHandle = outputDesc->mModule->mHandle;
3093
3094                mOutputs.removeItem(mPrimaryOutput);
3095
3096                sp<AudioOutputDescriptor> outputDesc = new AudioOutputDescriptor(NULL);
3097                outputDesc->mDevice = AUDIO_DEVICE_OUT_SPEAKER;
3098                audio_config_t config = AUDIO_CONFIG_INITIALIZER;
3099                config.sample_rate = outputDesc->mSamplingRate;
3100                config.channel_mask = outputDesc->mChannelMask;
3101                config.format = outputDesc->mFormat;
3102                status_t status = mpClientInterface->openOutput(moduleHandle,
3103                                                                &mPrimaryOutput,
3104                                                                &config,
3105                                                                &outputDesc->mDevice,
3106                                                                String8(""),
3107                                                                &outputDesc->mLatency,
3108                                                                outputDesc->mFlags);
3109                if (status != NO_ERROR) {
3110                    ALOGE("Failed to reopen hardware output stream, "
3111                        "samplingRate: %d, format %d, channels %d",
3112                        outputDesc->mSamplingRate, outputDesc->mFormat, outputDesc->mChannelMask);
3113                } else {
3114                    outputDesc->mSamplingRate = config.sample_rate;
3115                    outputDesc->mChannelMask = config.channel_mask;
3116                    outputDesc->mFormat = config.format;
3117                    AudioParameter outputCmd = AudioParameter();
3118                    outputCmd.addInt(String8("set_id"), 0);
3119                    mpClientInterface->setParameters(mPrimaryOutput, outputCmd.toString());
3120                    addOutput(mPrimaryOutput, outputDesc);
3121                }
3122            }
3123
3124
3125            mpClientInterface->setParameters(0, String8("test_cmd_policy="));
3126        }
3127    }
3128    return false;
3129}
3130
3131void AudioPolicyManager::exit()
3132{
3133    {
3134        AutoMutex _l(mLock);
3135        requestExit();
3136        mWaitWorkCV.signal();
3137    }
3138    requestExitAndWait();
3139}
3140
3141int AudioPolicyManager::testOutputIndex(audio_io_handle_t output)
3142{
3143    for (int i = 0; i < NUM_TEST_OUTPUTS; i++) {
3144        if (output == mTestOutputs[i]) return i;
3145    }
3146    return 0;
3147}
3148#endif //AUDIO_POLICY_TEST
3149
3150// ---
3151
3152void AudioPolicyManager::addOutput(audio_io_handle_t output, sp<AudioOutputDescriptor> outputDesc)
3153{
3154    outputDesc->mIoHandle = output;
3155    outputDesc->mId = nextUniqueId();
3156    mOutputs.add(output, outputDesc);
3157    nextAudioPortGeneration();
3158}
3159
3160void AudioPolicyManager::addInput(audio_io_handle_t input, sp<AudioInputDescriptor> inputDesc)
3161{
3162    inputDesc->mIoHandle = input;
3163    inputDesc->mId = nextUniqueId();
3164    mInputs.add(input, inputDesc);
3165    nextAudioPortGeneration();
3166}
3167
3168void AudioPolicyManager::findIoHandlesByAddress(sp<AudioOutputDescriptor> desc /*in*/,
3169        const String8 address /*in*/,
3170        SortedVector<audio_io_handle_t>& outputs /*out*/) {
3171    // look for a match on the given address on the addresses of the outputs:
3172    // find the address by finding the patch that maps to this output
3173    ssize_t patchIdx = mAudioPatches.indexOfKey(desc->mPatchHandle);
3174    //ALOGV("    inspecting output %d (patch %d) for supported device=0x%x",
3175    //        outputIdx, patchIdx,  desc->mProfile->mSupportedDevices.types());
3176    if (patchIdx >= 0) {
3177        const sp<AudioPatch> patchDesc = mAudioPatches.valueAt(patchIdx);
3178        const int numSinks = patchDesc->mPatch.num_sinks;
3179        for (ssize_t j=0; j < numSinks; j++) {
3180            if (patchDesc->mPatch.sinks[j].type == AUDIO_PORT_TYPE_DEVICE) {
3181                const char* patchAddr =
3182                        patchDesc->mPatch.sinks[j].ext.device.address;
3183                if (strncmp(patchAddr,
3184                        address.string(), AUDIO_DEVICE_MAX_ADDRESS_LEN) == 0) {
3185                    ALOGV("findIoHandlesByAddress(): adding opened output %d on same address %s",
3186                            desc->mIoHandle,  patchDesc->mPatch.sinks[j].ext.device.address);
3187                    outputs.add(desc->mIoHandle);
3188                    break;
3189                }
3190            }
3191        }
3192    }
3193}
3194
3195status_t AudioPolicyManager::checkOutputsForDevice(const sp<DeviceDescriptor> devDesc,
3196                                                       audio_policy_dev_state_t state,
3197                                                       SortedVector<audio_io_handle_t>& outputs,
3198                                                       const String8 address)
3199{
3200    audio_devices_t device = devDesc->mDeviceType;
3201    sp<AudioOutputDescriptor> desc;
3202    // erase all current sample rates, formats and channel masks
3203    devDesc->clearCapabilities();
3204
3205    if (state == AUDIO_POLICY_DEVICE_STATE_AVAILABLE) {
3206        // first list already open outputs that can be routed to this device
3207        for (size_t i = 0; i < mOutputs.size(); i++) {
3208            desc = mOutputs.valueAt(i);
3209            if (!desc->isDuplicated() && (desc->mProfile->mSupportedDevices.types() & device)) {
3210                if (!deviceDistinguishesOnAddress(device)) {
3211                    ALOGV("checkOutputsForDevice(): adding opened output %d", mOutputs.keyAt(i));
3212                    outputs.add(mOutputs.keyAt(i));
3213                } else {
3214                    ALOGV("  checking address match due to device 0x%x", device);
3215                    findIoHandlesByAddress(desc, address, outputs);
3216                }
3217            }
3218        }
3219        // then look for output profiles that can be routed to this device
3220        SortedVector< sp<IOProfile> > profiles;
3221        for (size_t i = 0; i < mHwModules.size(); i++)
3222        {
3223            if (mHwModules[i]->mHandle == 0) {
3224                continue;
3225            }
3226            for (size_t j = 0; j < mHwModules[i]->mOutputProfiles.size(); j++)
3227            {
3228                if (mHwModules[i]->mOutputProfiles[j]->mSupportedDevices.types() & device) {
3229                    ALOGV("checkOutputsForDevice(): adding profile %zu from module %zu", j, i);
3230                    profiles.add(mHwModules[i]->mOutputProfiles[j]);
3231                }
3232            }
3233        }
3234
3235        ALOGV("  found %d profiles, %d outputs", profiles.size(), outputs.size());
3236
3237        if (profiles.isEmpty() && outputs.isEmpty()) {
3238            ALOGW("checkOutputsForDevice(): No output available for device %04x", device);
3239            return BAD_VALUE;
3240        }
3241
3242        // open outputs for matching profiles if needed. Direct outputs are also opened to
3243        // query for dynamic parameters and will be closed later by setDeviceConnectionState()
3244        for (ssize_t profile_index = 0; profile_index < (ssize_t)profiles.size(); profile_index++) {
3245            sp<IOProfile> profile = profiles[profile_index];
3246
3247            // nothing to do if one output is already opened for this profile
3248            size_t j;
3249            for (j = 0; j < outputs.size(); j++) {
3250                desc = mOutputs.valueFor(outputs.itemAt(j));
3251                if (!desc->isDuplicated() && desc->mProfile == profile) {
3252                    // matching profile: save the sample rates, format and channel masks supported
3253                    // by the profile in our device descriptor
3254                    devDesc->importAudioPort(profile);
3255                    break;
3256                }
3257            }
3258            if (j != outputs.size()) {
3259                continue;
3260            }
3261
3262            ALOGV("opening output for device %08x with params %s profile %p",
3263                                                      device, address.string(), profile.get());
3264            desc = new AudioOutputDescriptor(profile);
3265            desc->mDevice = device;
3266            audio_config_t config = AUDIO_CONFIG_INITIALIZER;
3267            config.sample_rate = desc->mSamplingRate;
3268            config.channel_mask = desc->mChannelMask;
3269            config.format = desc->mFormat;
3270            config.offload_info.sample_rate = desc->mSamplingRate;
3271            config.offload_info.channel_mask = desc->mChannelMask;
3272            config.offload_info.format = desc->mFormat;
3273            audio_io_handle_t output = AUDIO_IO_HANDLE_NONE;
3274            status_t status = mpClientInterface->openOutput(profile->mModule->mHandle,
3275                                                            &output,
3276                                                            &config,
3277                                                            &desc->mDevice,
3278                                                            address,
3279                                                            &desc->mLatency,
3280                                                            desc->mFlags);
3281            if (status == NO_ERROR) {
3282                desc->mSamplingRate = config.sample_rate;
3283                desc->mChannelMask = config.channel_mask;
3284                desc->mFormat = config.format;
3285
3286                // Here is where the out_set_parameters() for card & device gets called
3287                if (!address.isEmpty()) {
3288                    char *param = audio_device_address_to_parameter(device, address);
3289                    mpClientInterface->setParameters(output, String8(param));
3290                    free(param);
3291                }
3292
3293                // Here is where we step through and resolve any "dynamic" fields
3294                String8 reply;
3295                char *value;
3296                if (profile->mSamplingRates[0] == 0) {
3297                    reply = mpClientInterface->getParameters(output,
3298                                            String8(AUDIO_PARAMETER_STREAM_SUP_SAMPLING_RATES));
3299                    ALOGV("checkOutputsForDevice() supported sampling rates %s",
3300                              reply.string());
3301                    value = strpbrk((char *)reply.string(), "=");
3302                    if (value != NULL) {
3303                        profile->loadSamplingRates(value + 1);
3304                    }
3305                }
3306                if (profile->mFormats[0] == AUDIO_FORMAT_DEFAULT) {
3307                    reply = mpClientInterface->getParameters(output,
3308                                                   String8(AUDIO_PARAMETER_STREAM_SUP_FORMATS));
3309                    ALOGV("checkOutputsForDevice() supported formats %s",
3310                              reply.string());
3311                    value = strpbrk((char *)reply.string(), "=");
3312                    if (value != NULL) {
3313                        profile->loadFormats(value + 1);
3314                    }
3315                }
3316                if (profile->mChannelMasks[0] == 0) {
3317                    reply = mpClientInterface->getParameters(output,
3318                                                  String8(AUDIO_PARAMETER_STREAM_SUP_CHANNELS));
3319                    ALOGV("checkOutputsForDevice() supported channel masks %s",
3320                              reply.string());
3321                    value = strpbrk((char *)reply.string(), "=");
3322                    if (value != NULL) {
3323                        profile->loadOutChannels(value + 1);
3324                    }
3325                }
3326                if (((profile->mSamplingRates[0] == 0) &&
3327                         (profile->mSamplingRates.size() < 2)) ||
3328                     ((profile->mFormats[0] == AUDIO_FORMAT_DEFAULT) &&
3329                         (profile->mFormats.size() < 2)) ||
3330                     ((profile->mChannelMasks[0] == 0) &&
3331                         (profile->mChannelMasks.size() < 2))) {
3332                    ALOGW("checkOutputsForDevice() missing param");
3333                    mpClientInterface->closeOutput(output);
3334                    output = AUDIO_IO_HANDLE_NONE;
3335                } else if (profile->mSamplingRates[0] == 0 || profile->mFormats[0] == 0 ||
3336                            profile->mChannelMasks[0] == 0) {
3337                    mpClientInterface->closeOutput(output);
3338                    config.sample_rate = profile->pickSamplingRate();
3339                    config.channel_mask = profile->pickChannelMask();
3340                    config.format = profile->pickFormat();
3341                    config.offload_info.sample_rate = config.sample_rate;
3342                    config.offload_info.channel_mask = config.channel_mask;
3343                    config.offload_info.format = config.format;
3344                    status = mpClientInterface->openOutput(profile->mModule->mHandle,
3345                                                           &output,
3346                                                           &config,
3347                                                           &desc->mDevice,
3348                                                           address,
3349                                                           &desc->mLatency,
3350                                                           desc->mFlags);
3351                    if (status == NO_ERROR) {
3352                        desc->mSamplingRate = config.sample_rate;
3353                        desc->mChannelMask = config.channel_mask;
3354                        desc->mFormat = config.format;
3355                    } else {
3356                        output = AUDIO_IO_HANDLE_NONE;
3357                    }
3358                }
3359
3360                if (output != AUDIO_IO_HANDLE_NONE) {
3361                    addOutput(output, desc);
3362                    if ((desc->mFlags & AUDIO_OUTPUT_FLAG_DIRECT) == 0) {
3363                        audio_io_handle_t duplicatedOutput = AUDIO_IO_HANDLE_NONE;
3364
3365                        // set initial stream volume for device
3366                        applyStreamVolumes(output, device, 0, true);
3367
3368                        //TODO: configure audio effect output stage here
3369
3370                        // open a duplicating output thread for the new output and the primary output
3371                        duplicatedOutput = mpClientInterface->openDuplicateOutput(output,
3372                                                                                  mPrimaryOutput);
3373                        if (duplicatedOutput != AUDIO_IO_HANDLE_NONE) {
3374                            // add duplicated output descriptor
3375                            sp<AudioOutputDescriptor> dupOutputDesc =
3376                                    new AudioOutputDescriptor(NULL);
3377                            dupOutputDesc->mOutput1 = mOutputs.valueFor(mPrimaryOutput);
3378                            dupOutputDesc->mOutput2 = mOutputs.valueFor(output);
3379                            dupOutputDesc->mSamplingRate = desc->mSamplingRate;
3380                            dupOutputDesc->mFormat = desc->mFormat;
3381                            dupOutputDesc->mChannelMask = desc->mChannelMask;
3382                            dupOutputDesc->mLatency = desc->mLatency;
3383                            addOutput(duplicatedOutput, dupOutputDesc);
3384                            applyStreamVolumes(duplicatedOutput, device, 0, true);
3385                        } else {
3386                            ALOGW("checkOutputsForDevice() could not open dup output for %d and %d",
3387                                    mPrimaryOutput, output);
3388                            mpClientInterface->closeOutput(output);
3389                            mOutputs.removeItem(output);
3390                            nextAudioPortGeneration();
3391                            output = AUDIO_IO_HANDLE_NONE;
3392                        }
3393                    }
3394                }
3395            } else {
3396                output = AUDIO_IO_HANDLE_NONE;
3397            }
3398            if (output == AUDIO_IO_HANDLE_NONE) {
3399                ALOGW("checkOutputsForDevice() could not open output for device %x", device);
3400                profiles.removeAt(profile_index);
3401                profile_index--;
3402            } else {
3403                outputs.add(output);
3404                devDesc->importAudioPort(profile);
3405
3406                if (deviceDistinguishesOnAddress(device)) {
3407                    ALOGV("checkOutputsForDevice(): setOutputDevice(dev=0x%x, addr=%s)",
3408                            device, address.string());
3409                    setOutputDevice(output, device, true/*force*/, 0/*delay*/,
3410                            NULL/*patch handle*/, address.string());
3411                }
3412                ALOGV("checkOutputsForDevice(): adding output %d", output);
3413            }
3414        }
3415
3416        if (profiles.isEmpty()) {
3417            ALOGW("checkOutputsForDevice(): No output available for device %04x", device);
3418            return BAD_VALUE;
3419        }
3420    } else { // Disconnect
3421        // check if one opened output is not needed any more after disconnecting one device
3422        for (size_t i = 0; i < mOutputs.size(); i++) {
3423            desc = mOutputs.valueAt(i);
3424            if (!desc->isDuplicated()) {
3425                if  (!(desc->mProfile->mSupportedDevices.types()
3426                        & mAvailableOutputDevices.types())) {
3427                    ALOGV("checkOutputsForDevice(): disconnecting adding output %d",
3428                            mOutputs.keyAt(i));
3429                    outputs.add(mOutputs.keyAt(i));
3430                } else if (deviceDistinguishesOnAddress(device) &&
3431                        // exact match on device
3432                        (desc->mProfile->mSupportedDevices.types() == device)) {
3433                    findIoHandlesByAddress(desc, address, outputs);
3434                }
3435            }
3436        }
3437        // Clear any profiles associated with the disconnected device.
3438        for (size_t i = 0; i < mHwModules.size(); i++)
3439        {
3440            if (mHwModules[i]->mHandle == 0) {
3441                continue;
3442            }
3443            for (size_t j = 0; j < mHwModules[i]->mOutputProfiles.size(); j++)
3444            {
3445                sp<IOProfile> profile = mHwModules[i]->mOutputProfiles[j];
3446                if (profile->mSupportedDevices.types() & device) {
3447                    ALOGV("checkOutputsForDevice(): "
3448                            "clearing direct output profile %zu on module %zu", j, i);
3449                    if (profile->mSamplingRates[0] == 0) {
3450                        profile->mSamplingRates.clear();
3451                        profile->mSamplingRates.add(0);
3452                    }
3453                    if (profile->mFormats[0] == AUDIO_FORMAT_DEFAULT) {
3454                        profile->mFormats.clear();
3455                        profile->mFormats.add(AUDIO_FORMAT_DEFAULT);
3456                    }
3457                    if (profile->mChannelMasks[0] == 0) {
3458                        profile->mChannelMasks.clear();
3459                        profile->mChannelMasks.add(0);
3460                    }
3461                }
3462            }
3463        }
3464    }
3465    return NO_ERROR;
3466}
3467
3468status_t AudioPolicyManager::checkInputsForDevice(audio_devices_t device,
3469                                                      audio_policy_dev_state_t state,
3470                                                      SortedVector<audio_io_handle_t>& inputs,
3471                                                      const String8 address)
3472{
3473    sp<AudioInputDescriptor> desc;
3474    if (state == AUDIO_POLICY_DEVICE_STATE_AVAILABLE) {
3475        // first list already open inputs that can be routed to this device
3476        for (size_t input_index = 0; input_index < mInputs.size(); input_index++) {
3477            desc = mInputs.valueAt(input_index);
3478            if (desc->mProfile->mSupportedDevices.types() & (device & ~AUDIO_DEVICE_BIT_IN)) {
3479                ALOGV("checkInputsForDevice(): adding opened input %d", mInputs.keyAt(input_index));
3480               inputs.add(mInputs.keyAt(input_index));
3481            }
3482        }
3483
3484        // then look for input profiles that can be routed to this device
3485        SortedVector< sp<IOProfile> > profiles;
3486        for (size_t module_idx = 0; module_idx < mHwModules.size(); module_idx++)
3487        {
3488            if (mHwModules[module_idx]->mHandle == 0) {
3489                continue;
3490            }
3491            for (size_t profile_index = 0;
3492                 profile_index < mHwModules[module_idx]->mInputProfiles.size();
3493                 profile_index++)
3494            {
3495                if (mHwModules[module_idx]->mInputProfiles[profile_index]->mSupportedDevices.types()
3496                        & (device & ~AUDIO_DEVICE_BIT_IN)) {
3497                    ALOGV("checkInputsForDevice(): adding profile %zu from module %zu",
3498                          profile_index, module_idx);
3499                    profiles.add(mHwModules[module_idx]->mInputProfiles[profile_index]);
3500                }
3501            }
3502        }
3503
3504        if (profiles.isEmpty() && inputs.isEmpty()) {
3505            ALOGW("checkInputsForDevice(): No input available for device 0x%X", device);
3506            return BAD_VALUE;
3507        }
3508
3509        // open inputs for matching profiles if needed. Direct inputs are also opened to
3510        // query for dynamic parameters and will be closed later by setDeviceConnectionState()
3511        for (ssize_t profile_index = 0; profile_index < (ssize_t)profiles.size(); profile_index++) {
3512
3513            sp<IOProfile> profile = profiles[profile_index];
3514            // nothing to do if one input is already opened for this profile
3515            size_t input_index;
3516            for (input_index = 0; input_index < mInputs.size(); input_index++) {
3517                desc = mInputs.valueAt(input_index);
3518                if (desc->mProfile == profile) {
3519                    break;
3520                }
3521            }
3522            if (input_index != mInputs.size()) {
3523                continue;
3524            }
3525
3526            ALOGV("opening input for device 0x%X with params %s", device, address.string());
3527            desc = new AudioInputDescriptor(profile);
3528            desc->mDevice = device;
3529            audio_config_t config = AUDIO_CONFIG_INITIALIZER;
3530            config.sample_rate = desc->mSamplingRate;
3531            config.channel_mask = desc->mChannelMask;
3532            config.format = desc->mFormat;
3533            audio_io_handle_t input = AUDIO_IO_HANDLE_NONE;
3534            status_t status = mpClientInterface->openInput(profile->mModule->mHandle,
3535                                                           &input,
3536                                                           &config,
3537                                                           &desc->mDevice,
3538                                                           address,
3539                                                           AUDIO_SOURCE_MIC,
3540                                                           AUDIO_INPUT_FLAG_NONE /*FIXME*/);
3541
3542            if (status == NO_ERROR) {
3543                desc->mSamplingRate = config.sample_rate;
3544                desc->mChannelMask = config.channel_mask;
3545                desc->mFormat = config.format;
3546
3547                if (!address.isEmpty()) {
3548                    char *param = audio_device_address_to_parameter(device, address);
3549                    mpClientInterface->setParameters(input, String8(param));
3550                    free(param);
3551                }
3552
3553                // Here is where we step through and resolve any "dynamic" fields
3554                String8 reply;
3555                char *value;
3556                if (profile->mSamplingRates[0] == 0) {
3557                    reply = mpClientInterface->getParameters(input,
3558                                            String8(AUDIO_PARAMETER_STREAM_SUP_SAMPLING_RATES));
3559                    ALOGV("checkInputsForDevice() direct input sup sampling rates %s",
3560                              reply.string());
3561                    value = strpbrk((char *)reply.string(), "=");
3562                    if (value != NULL) {
3563                        profile->loadSamplingRates(value + 1);
3564                    }
3565                }
3566                if (profile->mFormats[0] == AUDIO_FORMAT_DEFAULT) {
3567                    reply = mpClientInterface->getParameters(input,
3568                                                   String8(AUDIO_PARAMETER_STREAM_SUP_FORMATS));
3569                    ALOGV("checkInputsForDevice() direct input sup formats %s", reply.string());
3570                    value = strpbrk((char *)reply.string(), "=");
3571                    if (value != NULL) {
3572                        profile->loadFormats(value + 1);
3573                    }
3574                }
3575                if (profile->mChannelMasks[0] == 0) {
3576                    reply = mpClientInterface->getParameters(input,
3577                                                  String8(AUDIO_PARAMETER_STREAM_SUP_CHANNELS));
3578                    ALOGV("checkInputsForDevice() direct input sup channel masks %s",
3579                              reply.string());
3580                    value = strpbrk((char *)reply.string(), "=");
3581                    if (value != NULL) {
3582                        profile->loadInChannels(value + 1);
3583                    }
3584                }
3585                if (((profile->mSamplingRates[0] == 0) && (profile->mSamplingRates.size() < 2)) ||
3586                     ((profile->mFormats[0] == 0) && (profile->mFormats.size() < 2)) ||
3587                     ((profile->mChannelMasks[0] == 0) && (profile->mChannelMasks.size() < 2))) {
3588                    ALOGW("checkInputsForDevice() direct input missing param");
3589                    mpClientInterface->closeInput(input);
3590                    input = AUDIO_IO_HANDLE_NONE;
3591                }
3592
3593                if (input != 0) {
3594                    addInput(input, desc);
3595                }
3596            } // endif input != 0
3597
3598            if (input == AUDIO_IO_HANDLE_NONE) {
3599                ALOGW("checkInputsForDevice() could not open input for device 0x%X", device);
3600                profiles.removeAt(profile_index);
3601                profile_index--;
3602            } else {
3603                inputs.add(input);
3604                ALOGV("checkInputsForDevice(): adding input %d", input);
3605            }
3606        } // end scan profiles
3607
3608        if (profiles.isEmpty()) {
3609            ALOGW("checkInputsForDevice(): No input available for device 0x%X", device);
3610            return BAD_VALUE;
3611        }
3612    } else {
3613        // Disconnect
3614        // check if one opened input is not needed any more after disconnecting one device
3615        for (size_t input_index = 0; input_index < mInputs.size(); input_index++) {
3616            desc = mInputs.valueAt(input_index);
3617            if (!(desc->mProfile->mSupportedDevices.types() & mAvailableInputDevices.types() &
3618                    ~AUDIO_DEVICE_BIT_IN)) {
3619                ALOGV("checkInputsForDevice(): disconnecting adding input %d",
3620                      mInputs.keyAt(input_index));
3621                inputs.add(mInputs.keyAt(input_index));
3622            }
3623        }
3624        // Clear any profiles associated with the disconnected device.
3625        for (size_t module_index = 0; module_index < mHwModules.size(); module_index++) {
3626            if (mHwModules[module_index]->mHandle == 0) {
3627                continue;
3628            }
3629            for (size_t profile_index = 0;
3630                 profile_index < mHwModules[module_index]->mInputProfiles.size();
3631                 profile_index++) {
3632                sp<IOProfile> profile = mHwModules[module_index]->mInputProfiles[profile_index];
3633                if (profile->mSupportedDevices.types() & device & ~AUDIO_DEVICE_BIT_IN) {
3634                    ALOGV("checkInputsForDevice(): clearing direct input profile %zu on module %zu",
3635                          profile_index, module_index);
3636                    if (profile->mSamplingRates[0] == 0) {
3637                        profile->mSamplingRates.clear();
3638                        profile->mSamplingRates.add(0);
3639                    }
3640                    if (profile->mFormats[0] == AUDIO_FORMAT_DEFAULT) {
3641                        profile->mFormats.clear();
3642                        profile->mFormats.add(AUDIO_FORMAT_DEFAULT);
3643                    }
3644                    if (profile->mChannelMasks[0] == 0) {
3645                        profile->mChannelMasks.clear();
3646                        profile->mChannelMasks.add(0);
3647                    }
3648                }
3649            }
3650        }
3651    } // end disconnect
3652
3653    return NO_ERROR;
3654}
3655
3656
3657void AudioPolicyManager::closeOutput(audio_io_handle_t output)
3658{
3659    ALOGV("closeOutput(%d)", output);
3660
3661    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
3662    if (outputDesc == NULL) {
3663        ALOGW("closeOutput() unknown output %d", output);
3664        return;
3665    }
3666
3667    // look for duplicated outputs connected to the output being removed.
3668    for (size_t i = 0; i < mOutputs.size(); i++) {
3669        sp<AudioOutputDescriptor> dupOutputDesc = mOutputs.valueAt(i);
3670        if (dupOutputDesc->isDuplicated() &&
3671                (dupOutputDesc->mOutput1 == outputDesc ||
3672                dupOutputDesc->mOutput2 == outputDesc)) {
3673            sp<AudioOutputDescriptor> outputDesc2;
3674            if (dupOutputDesc->mOutput1 == outputDesc) {
3675                outputDesc2 = dupOutputDesc->mOutput2;
3676            } else {
3677                outputDesc2 = dupOutputDesc->mOutput1;
3678            }
3679            // As all active tracks on duplicated output will be deleted,
3680            // and as they were also referenced on the other output, the reference
3681            // count for their stream type must be adjusted accordingly on
3682            // the other output.
3683            for (int j = 0; j < AUDIO_STREAM_CNT; j++) {
3684                int refCount = dupOutputDesc->mRefCount[j];
3685                outputDesc2->changeRefCount((audio_stream_type_t)j,-refCount);
3686            }
3687            audio_io_handle_t duplicatedOutput = mOutputs.keyAt(i);
3688            ALOGV("closeOutput() closing also duplicated output %d", duplicatedOutput);
3689
3690            mpClientInterface->closeOutput(duplicatedOutput);
3691            mOutputs.removeItem(duplicatedOutput);
3692        }
3693    }
3694
3695    nextAudioPortGeneration();
3696
3697    ssize_t index = mAudioPatches.indexOfKey(outputDesc->mPatchHandle);
3698    if (index >= 0) {
3699        sp<AudioPatch> patchDesc = mAudioPatches.valueAt(index);
3700        status_t status = mpClientInterface->releaseAudioPatch(patchDesc->mAfPatchHandle, 0);
3701        mAudioPatches.removeItemsAt(index);
3702        mpClientInterface->onAudioPatchListUpdate();
3703    }
3704
3705    AudioParameter param;
3706    param.add(String8("closing"), String8("true"));
3707    mpClientInterface->setParameters(output, param.toString());
3708
3709    mpClientInterface->closeOutput(output);
3710    mOutputs.removeItem(output);
3711    mPreviousOutputs = mOutputs;
3712}
3713
3714void AudioPolicyManager::closeInput(audio_io_handle_t input)
3715{
3716    ALOGV("closeInput(%d)", input);
3717
3718    sp<AudioInputDescriptor> inputDesc = mInputs.valueFor(input);
3719    if (inputDesc == NULL) {
3720        ALOGW("closeInput() unknown input %d", input);
3721        return;
3722    }
3723
3724    nextAudioPortGeneration();
3725
3726    ssize_t index = mAudioPatches.indexOfKey(inputDesc->mPatchHandle);
3727    if (index >= 0) {
3728        sp<AudioPatch> patchDesc = mAudioPatches.valueAt(index);
3729        status_t status = mpClientInterface->releaseAudioPatch(patchDesc->mAfPatchHandle, 0);
3730        mAudioPatches.removeItemsAt(index);
3731        mpClientInterface->onAudioPatchListUpdate();
3732    }
3733
3734    mpClientInterface->closeInput(input);
3735    mInputs.removeItem(input);
3736}
3737
3738SortedVector<audio_io_handle_t> AudioPolicyManager::getOutputsForDevice(audio_devices_t device,
3739                        DefaultKeyedVector<audio_io_handle_t, sp<AudioOutputDescriptor> > openOutputs)
3740{
3741    SortedVector<audio_io_handle_t> outputs;
3742
3743    ALOGVV("getOutputsForDevice() device %04x", device);
3744    for (size_t i = 0; i < openOutputs.size(); i++) {
3745        ALOGVV("output %d isDuplicated=%d device=%04x",
3746                i, openOutputs.valueAt(i)->isDuplicated(), openOutputs.valueAt(i)->supportedDevices());
3747        if ((device & openOutputs.valueAt(i)->supportedDevices()) == device) {
3748            ALOGVV("getOutputsForDevice() found output %d", openOutputs.keyAt(i));
3749            outputs.add(openOutputs.keyAt(i));
3750        }
3751    }
3752    return outputs;
3753}
3754
3755bool AudioPolicyManager::vectorsEqual(SortedVector<audio_io_handle_t>& outputs1,
3756                                   SortedVector<audio_io_handle_t>& outputs2)
3757{
3758    if (outputs1.size() != outputs2.size()) {
3759        return false;
3760    }
3761    for (size_t i = 0; i < outputs1.size(); i++) {
3762        if (outputs1[i] != outputs2[i]) {
3763            return false;
3764        }
3765    }
3766    return true;
3767}
3768
3769void AudioPolicyManager::checkOutputForStrategy(routing_strategy strategy)
3770{
3771    audio_devices_t oldDevice = getDeviceForStrategy(strategy, true /*fromCache*/);
3772    audio_devices_t newDevice = getDeviceForStrategy(strategy, false /*fromCache*/);
3773    SortedVector<audio_io_handle_t> srcOutputs = getOutputsForDevice(oldDevice, mPreviousOutputs);
3774    SortedVector<audio_io_handle_t> dstOutputs = getOutputsForDevice(newDevice, mOutputs);
3775
3776    if (!vectorsEqual(srcOutputs,dstOutputs)) {
3777        ALOGV("checkOutputForStrategy() strategy %d, moving from output %d to output %d",
3778              strategy, srcOutputs[0], dstOutputs[0]);
3779        // mute strategy while moving tracks from one output to another
3780        for (size_t i = 0; i < srcOutputs.size(); i++) {
3781            sp<AudioOutputDescriptor> desc = mOutputs.valueFor(srcOutputs[i]);
3782            if (desc->isStrategyActive(strategy)) {
3783                setStrategyMute(strategy, true, srcOutputs[i]);
3784                setStrategyMute(strategy, false, srcOutputs[i], MUTE_TIME_MS, newDevice);
3785            }
3786        }
3787
3788        // Move effects associated to this strategy from previous output to new output
3789        if (strategy == STRATEGY_MEDIA) {
3790            audio_io_handle_t fxOutput = selectOutputForEffects(dstOutputs);
3791            SortedVector<audio_io_handle_t> moved;
3792            for (size_t i = 0; i < mEffects.size(); i++) {
3793                sp<EffectDescriptor> effectDesc = mEffects.valueAt(i);
3794                if (effectDesc->mSession == AUDIO_SESSION_OUTPUT_MIX &&
3795                        effectDesc->mIo != fxOutput) {
3796                    if (moved.indexOf(effectDesc->mIo) < 0) {
3797                        ALOGV("checkOutputForStrategy() moving effect %d to output %d",
3798                              mEffects.keyAt(i), fxOutput);
3799                        mpClientInterface->moveEffects(AUDIO_SESSION_OUTPUT_MIX, effectDesc->mIo,
3800                                                       fxOutput);
3801                        moved.add(effectDesc->mIo);
3802                    }
3803                    effectDesc->mIo = fxOutput;
3804                }
3805            }
3806        }
3807        // Move tracks associated to this strategy from previous output to new output
3808        for (int i = 0; i < AUDIO_STREAM_CNT; i++) {
3809            if (i == AUDIO_STREAM_PATCH) {
3810                continue;
3811            }
3812            if (getStrategy((audio_stream_type_t)i) == strategy) {
3813                mpClientInterface->invalidateStream((audio_stream_type_t)i);
3814            }
3815        }
3816    }
3817}
3818
3819void AudioPolicyManager::checkOutputForAllStrategies()
3820{
3821    if (mForceUse[AUDIO_POLICY_FORCE_FOR_SYSTEM] == AUDIO_POLICY_FORCE_SYSTEM_ENFORCED)
3822        checkOutputForStrategy(STRATEGY_ENFORCED_AUDIBLE);
3823    checkOutputForStrategy(STRATEGY_PHONE);
3824    if (mForceUse[AUDIO_POLICY_FORCE_FOR_SYSTEM] != AUDIO_POLICY_FORCE_SYSTEM_ENFORCED)
3825        checkOutputForStrategy(STRATEGY_ENFORCED_AUDIBLE);
3826    checkOutputForStrategy(STRATEGY_SONIFICATION);
3827    checkOutputForStrategy(STRATEGY_SONIFICATION_RESPECTFUL);
3828    checkOutputForStrategy(STRATEGY_ACCESSIBILITY);
3829    checkOutputForStrategy(STRATEGY_MEDIA);
3830    checkOutputForStrategy(STRATEGY_DTMF);
3831    checkOutputForStrategy(STRATEGY_REROUTING);
3832}
3833
3834audio_io_handle_t AudioPolicyManager::getA2dpOutput()
3835{
3836    for (size_t i = 0; i < mOutputs.size(); i++) {
3837        sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(i);
3838        if (!outputDesc->isDuplicated() && outputDesc->device() & AUDIO_DEVICE_OUT_ALL_A2DP) {
3839            return mOutputs.keyAt(i);
3840        }
3841    }
3842
3843    return 0;
3844}
3845
3846void AudioPolicyManager::checkA2dpSuspend()
3847{
3848    audio_io_handle_t a2dpOutput = getA2dpOutput();
3849    if (a2dpOutput == 0) {
3850        mA2dpSuspended = false;
3851        return;
3852    }
3853
3854    bool isScoConnected =
3855            ((mAvailableInputDevices.types() & AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET &
3856                    ~AUDIO_DEVICE_BIT_IN) != 0) ||
3857            ((mAvailableOutputDevices.types() & AUDIO_DEVICE_OUT_ALL_SCO) != 0);
3858    // suspend A2DP output if:
3859    //      (NOT already suspended) &&
3860    //      ((SCO device is connected &&
3861    //       (forced usage for communication || for record is SCO))) ||
3862    //      (phone state is ringing || in call)
3863    //
3864    // restore A2DP output if:
3865    //      (Already suspended) &&
3866    //      ((SCO device is NOT connected ||
3867    //       (forced usage NOT for communication && NOT for record is SCO))) &&
3868    //      (phone state is NOT ringing && NOT in call)
3869    //
3870    if (mA2dpSuspended) {
3871        if ((!isScoConnected ||
3872             ((mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION] != AUDIO_POLICY_FORCE_BT_SCO) &&
3873              (mForceUse[AUDIO_POLICY_FORCE_FOR_RECORD] != AUDIO_POLICY_FORCE_BT_SCO))) &&
3874             ((mPhoneState != AUDIO_MODE_IN_CALL) &&
3875              (mPhoneState != AUDIO_MODE_RINGTONE))) {
3876
3877            mpClientInterface->restoreOutput(a2dpOutput);
3878            mA2dpSuspended = false;
3879        }
3880    } else {
3881        if ((isScoConnected &&
3882             ((mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION] == AUDIO_POLICY_FORCE_BT_SCO) ||
3883              (mForceUse[AUDIO_POLICY_FORCE_FOR_RECORD] == AUDIO_POLICY_FORCE_BT_SCO))) ||
3884             ((mPhoneState == AUDIO_MODE_IN_CALL) ||
3885              (mPhoneState == AUDIO_MODE_RINGTONE))) {
3886
3887            mpClientInterface->suspendOutput(a2dpOutput);
3888            mA2dpSuspended = true;
3889        }
3890    }
3891}
3892
3893audio_devices_t AudioPolicyManager::getNewOutputDevice(audio_io_handle_t output, bool fromCache)
3894{
3895    audio_devices_t device = AUDIO_DEVICE_NONE;
3896
3897    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
3898
3899    ssize_t index = mAudioPatches.indexOfKey(outputDesc->mPatchHandle);
3900    if (index >= 0) {
3901        sp<AudioPatch> patchDesc = mAudioPatches.valueAt(index);
3902        if (patchDesc->mUid != mUidCached) {
3903            ALOGV("getNewOutputDevice() device %08x forced by patch %d",
3904                  outputDesc->device(), outputDesc->mPatchHandle);
3905            return outputDesc->device();
3906        }
3907    }
3908
3909    // check the following by order of priority to request a routing change if necessary:
3910    // 1: the strategy enforced audible is active and enforced on the output:
3911    //      use device for strategy enforced audible
3912    // 2: we are in call or the strategy phone is active on the output:
3913    //      use device for strategy phone
3914    // 3: the strategy for enforced audible is active but not enforced on the output:
3915    //      use the device for strategy enforced audible
3916    // 4: the strategy sonification is active on the output:
3917    //      use device for strategy sonification
3918    // 5: the strategy "respectful" sonification is active on the output:
3919    //      use device for strategy "respectful" sonification
3920    // 6: the strategy accessibility is active on the output:
3921    //      use device for strategy accessibility
3922    // 7: the strategy media is active on the output:
3923    //      use device for strategy media
3924    // 8: the strategy DTMF is active on the output:
3925    //      use device for strategy DTMF
3926    // 9: the strategy for beacon, a.k.a. "transmitted through speaker" is active on the output:
3927    //      use device for strategy t-t-s
3928    if (outputDesc->isStrategyActive(STRATEGY_ENFORCED_AUDIBLE) &&
3929        mForceUse[AUDIO_POLICY_FORCE_FOR_SYSTEM] == AUDIO_POLICY_FORCE_SYSTEM_ENFORCED) {
3930        device = getDeviceForStrategy(STRATEGY_ENFORCED_AUDIBLE, fromCache);
3931    } else if (isInCall() ||
3932                    outputDesc->isStrategyActive(STRATEGY_PHONE)) {
3933        device = getDeviceForStrategy(STRATEGY_PHONE, fromCache);
3934    } else if (outputDesc->isStrategyActive(STRATEGY_ENFORCED_AUDIBLE)) {
3935        device = getDeviceForStrategy(STRATEGY_ENFORCED_AUDIBLE, fromCache);
3936    } else if (outputDesc->isStrategyActive(STRATEGY_SONIFICATION)) {
3937        device = getDeviceForStrategy(STRATEGY_SONIFICATION, fromCache);
3938    } else if (outputDesc->isStrategyActive(STRATEGY_SONIFICATION_RESPECTFUL)) {
3939        device = getDeviceForStrategy(STRATEGY_SONIFICATION_RESPECTFUL, fromCache);
3940    } else if (outputDesc->isStrategyActive(STRATEGY_ACCESSIBILITY)) {
3941        device = getDeviceForStrategy(STRATEGY_ACCESSIBILITY, fromCache);
3942    } else if (outputDesc->isStrategyActive(STRATEGY_MEDIA)) {
3943        device = getDeviceForStrategy(STRATEGY_MEDIA, fromCache);
3944    } else if (outputDesc->isStrategyActive(STRATEGY_DTMF)) {
3945        device = getDeviceForStrategy(STRATEGY_DTMF, fromCache);
3946    } else if (outputDesc->isStrategyActive(STRATEGY_TRANSMITTED_THROUGH_SPEAKER)) {
3947        device = getDeviceForStrategy(STRATEGY_TRANSMITTED_THROUGH_SPEAKER, fromCache);
3948    } else if (outputDesc->isStrategyActive(STRATEGY_REROUTING)) {
3949        device = getDeviceForStrategy(STRATEGY_REROUTING, fromCache);
3950    }
3951
3952    ALOGV("getNewOutputDevice() selected device %x", device);
3953    return device;
3954}
3955
3956audio_devices_t AudioPolicyManager::getNewInputDevice(audio_io_handle_t input)
3957{
3958    sp<AudioInputDescriptor> inputDesc = mInputs.valueFor(input);
3959
3960    ssize_t index = mAudioPatches.indexOfKey(inputDesc->mPatchHandle);
3961    if (index >= 0) {
3962        sp<AudioPatch> patchDesc = mAudioPatches.valueAt(index);
3963        if (patchDesc->mUid != mUidCached) {
3964            ALOGV("getNewInputDevice() device %08x forced by patch %d",
3965                  inputDesc->mDevice, inputDesc->mPatchHandle);
3966            return inputDesc->mDevice;
3967        }
3968    }
3969
3970    audio_devices_t device = getDeviceForInputSource(inputDesc->mInputSource);
3971
3972    ALOGV("getNewInputDevice() selected device %x", device);
3973    return device;
3974}
3975
3976uint32_t AudioPolicyManager::getStrategyForStream(audio_stream_type_t stream) {
3977    return (uint32_t)getStrategy(stream);
3978}
3979
3980audio_devices_t AudioPolicyManager::getDevicesForStream(audio_stream_type_t stream) {
3981    // By checking the range of stream before calling getStrategy, we avoid
3982    // getStrategy's behavior for invalid streams.  getStrategy would do a ALOGE
3983    // and then return STRATEGY_MEDIA, but we want to return the empty set.
3984    if (stream < (audio_stream_type_t) 0 || stream >= AUDIO_STREAM_PUBLIC_CNT) {
3985        return AUDIO_DEVICE_NONE;
3986    }
3987    audio_devices_t devices;
3988    AudioPolicyManager::routing_strategy strategy = getStrategy(stream);
3989    devices = getDeviceForStrategy(strategy, true /*fromCache*/);
3990    SortedVector<audio_io_handle_t> outputs = getOutputsForDevice(devices, mOutputs);
3991    for (size_t i = 0; i < outputs.size(); i++) {
3992        sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(outputs[i]);
3993        if (outputDesc->isStrategyActive(strategy)) {
3994            devices = outputDesc->device();
3995            break;
3996        }
3997    }
3998
3999    /*Filter SPEAKER_SAFE out of results, as AudioService doesn't know about it
4000      and doesn't really need to.*/
4001    if (devices & AUDIO_DEVICE_OUT_SPEAKER_SAFE) {
4002        devices |= AUDIO_DEVICE_OUT_SPEAKER;
4003        devices &= ~AUDIO_DEVICE_OUT_SPEAKER_SAFE;
4004    }
4005
4006    return devices;
4007}
4008
4009AudioPolicyManager::routing_strategy AudioPolicyManager::getStrategy(
4010        audio_stream_type_t stream) {
4011
4012    ALOG_ASSERT(stream != AUDIO_STREAM_PATCH,"getStrategy() called for AUDIO_STREAM_PATCH");
4013
4014    // stream to strategy mapping
4015    switch (stream) {
4016    case AUDIO_STREAM_VOICE_CALL:
4017    case AUDIO_STREAM_BLUETOOTH_SCO:
4018        return STRATEGY_PHONE;
4019    case AUDIO_STREAM_RING:
4020    case AUDIO_STREAM_ALARM:
4021        return STRATEGY_SONIFICATION;
4022    case AUDIO_STREAM_NOTIFICATION:
4023        return STRATEGY_SONIFICATION_RESPECTFUL;
4024    case AUDIO_STREAM_DTMF:
4025        return STRATEGY_DTMF;
4026    default:
4027        ALOGE("unknown stream type %d", stream);
4028    case AUDIO_STREAM_SYSTEM:
4029        // NOTE: SYSTEM stream uses MEDIA strategy because muting music and switching outputs
4030        // while key clicks are played produces a poor result
4031    case AUDIO_STREAM_MUSIC:
4032        return STRATEGY_MEDIA;
4033    case AUDIO_STREAM_ENFORCED_AUDIBLE:
4034        return STRATEGY_ENFORCED_AUDIBLE;
4035    case AUDIO_STREAM_TTS:
4036        return STRATEGY_TRANSMITTED_THROUGH_SPEAKER;
4037    case AUDIO_STREAM_ACCESSIBILITY:
4038        return STRATEGY_ACCESSIBILITY;
4039    case AUDIO_STREAM_REROUTING:
4040        return STRATEGY_REROUTING;
4041    }
4042}
4043
4044uint32_t AudioPolicyManager::getStrategyForAttr(const audio_attributes_t *attr) {
4045    // flags to strategy mapping
4046    if ((attr->flags & AUDIO_FLAG_BEACON) == AUDIO_FLAG_BEACON) {
4047        return (uint32_t) STRATEGY_TRANSMITTED_THROUGH_SPEAKER;
4048    }
4049    if ((attr->flags & AUDIO_FLAG_AUDIBILITY_ENFORCED) == AUDIO_FLAG_AUDIBILITY_ENFORCED) {
4050        return (uint32_t) STRATEGY_ENFORCED_AUDIBLE;
4051    }
4052
4053    // usage to strategy mapping
4054    switch (attr->usage) {
4055    case AUDIO_USAGE_ASSISTANCE_ACCESSIBILITY:
4056        if (isStreamActive(AUDIO_STREAM_RING) || isStreamActive(AUDIO_STREAM_ALARM)) {
4057            return (uint32_t) STRATEGY_SONIFICATION;
4058        }
4059        if (isInCall()) {
4060            return (uint32_t) STRATEGY_PHONE;
4061        }
4062        return (uint32_t) STRATEGY_ACCESSIBILITY;
4063
4064    case AUDIO_USAGE_MEDIA:
4065    case AUDIO_USAGE_GAME:
4066    case AUDIO_USAGE_ASSISTANCE_NAVIGATION_GUIDANCE:
4067    case AUDIO_USAGE_ASSISTANCE_SONIFICATION:
4068        return (uint32_t) STRATEGY_MEDIA;
4069
4070    case AUDIO_USAGE_VOICE_COMMUNICATION:
4071        return (uint32_t) STRATEGY_PHONE;
4072
4073    case AUDIO_USAGE_VOICE_COMMUNICATION_SIGNALLING:
4074        return (uint32_t) STRATEGY_DTMF;
4075
4076    case AUDIO_USAGE_ALARM:
4077    case AUDIO_USAGE_NOTIFICATION_TELEPHONY_RINGTONE:
4078        return (uint32_t) STRATEGY_SONIFICATION;
4079
4080    case AUDIO_USAGE_NOTIFICATION:
4081    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_REQUEST:
4082    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_INSTANT:
4083    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_DELAYED:
4084    case AUDIO_USAGE_NOTIFICATION_EVENT:
4085        return (uint32_t) STRATEGY_SONIFICATION_RESPECTFUL;
4086
4087    case AUDIO_USAGE_UNKNOWN:
4088    default:
4089        return (uint32_t) STRATEGY_MEDIA;
4090    }
4091}
4092
4093void AudioPolicyManager::handleNotificationRoutingForStream(audio_stream_type_t stream) {
4094    switch(stream) {
4095    case AUDIO_STREAM_MUSIC:
4096        checkOutputForStrategy(STRATEGY_SONIFICATION_RESPECTFUL);
4097        updateDevicesAndOutputs();
4098        break;
4099    default:
4100        break;
4101    }
4102}
4103
4104bool AudioPolicyManager::isAnyOutputActive(audio_stream_type_t streamToIgnore) {
4105    for (size_t s = 0 ; s < AUDIO_STREAM_CNT ; s++) {
4106        if (s == (size_t) streamToIgnore) {
4107            continue;
4108        }
4109        for (size_t i = 0; i < mOutputs.size(); i++) {
4110            const sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(i);
4111            if (outputDesc->mRefCount[s] != 0) {
4112                return true;
4113            }
4114        }
4115    }
4116    return false;
4117}
4118
4119uint32_t AudioPolicyManager::handleEventForBeacon(int event) {
4120    switch(event) {
4121    case STARTING_OUTPUT:
4122        mBeaconMuteRefCount++;
4123        break;
4124    case STOPPING_OUTPUT:
4125        if (mBeaconMuteRefCount > 0) {
4126            mBeaconMuteRefCount--;
4127        }
4128        break;
4129    case STARTING_BEACON:
4130        mBeaconPlayingRefCount++;
4131        break;
4132    case STOPPING_BEACON:
4133        if (mBeaconPlayingRefCount > 0) {
4134            mBeaconPlayingRefCount--;
4135        }
4136        break;
4137    }
4138
4139    if (mBeaconMuteRefCount > 0) {
4140        // any playback causes beacon to be muted
4141        return setBeaconMute(true);
4142    } else {
4143        // no other playback: unmute when beacon starts playing, mute when it stops
4144        return setBeaconMute(mBeaconPlayingRefCount == 0);
4145    }
4146}
4147
4148uint32_t AudioPolicyManager::setBeaconMute(bool mute) {
4149    ALOGV("setBeaconMute(%d) mBeaconMuteRefCount=%d mBeaconPlayingRefCount=%d",
4150            mute, mBeaconMuteRefCount, mBeaconPlayingRefCount);
4151    // keep track of muted state to avoid repeating mute/unmute operations
4152    if (mBeaconMuted != mute) {
4153        // mute/unmute AUDIO_STREAM_TTS on all outputs
4154        ALOGV("\t muting %d", mute);
4155        uint32_t maxLatency = 0;
4156        for (size_t i = 0; i < mOutputs.size(); i++) {
4157            sp<AudioOutputDescriptor> desc = mOutputs.valueAt(i);
4158            setStreamMute(AUDIO_STREAM_TTS, mute/*on*/,
4159                    desc->mIoHandle,
4160                    0 /*delay*/, AUDIO_DEVICE_NONE);
4161            const uint32_t latency = desc->latency() * 2;
4162            if (latency > maxLatency) {
4163                maxLatency = latency;
4164            }
4165        }
4166        mBeaconMuted = mute;
4167        return maxLatency;
4168    }
4169    return 0;
4170}
4171
4172audio_devices_t AudioPolicyManager::getDeviceForStrategy(routing_strategy strategy,
4173                                                             bool fromCache)
4174{
4175    uint32_t device = AUDIO_DEVICE_NONE;
4176
4177    if (fromCache) {
4178        ALOGVV("getDeviceForStrategy() from cache strategy %d, device %x",
4179              strategy, mDeviceForStrategy[strategy]);
4180        return mDeviceForStrategy[strategy];
4181    }
4182    audio_devices_t availableOutputDeviceTypes = mAvailableOutputDevices.types();
4183    switch (strategy) {
4184
4185    case STRATEGY_TRANSMITTED_THROUGH_SPEAKER:
4186        device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPEAKER;
4187        if (!device) {
4188            ALOGE("getDeviceForStrategy() no device found for "\
4189                    "STRATEGY_TRANSMITTED_THROUGH_SPEAKER");
4190        }
4191        break;
4192
4193    case STRATEGY_SONIFICATION_RESPECTFUL:
4194        if (isInCall()) {
4195            device = getDeviceForStrategy(STRATEGY_SONIFICATION, false /*fromCache*/);
4196        } else if (isStreamActiveRemotely(AUDIO_STREAM_MUSIC,
4197                SONIFICATION_RESPECTFUL_AFTER_MUSIC_DELAY)) {
4198            // while media is playing on a remote device, use the the sonification behavior.
4199            // Note that we test this usecase before testing if media is playing because
4200            //   the isStreamActive() method only informs about the activity of a stream, not
4201            //   if it's for local playback. Note also that we use the same delay between both tests
4202            device = getDeviceForStrategy(STRATEGY_SONIFICATION, false /*fromCache*/);
4203            //user "safe" speaker if available instead of normal speaker to avoid triggering
4204            //other acoustic safety mechanisms for notification
4205            if (device == AUDIO_DEVICE_OUT_SPEAKER && (availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPEAKER_SAFE))
4206                device = AUDIO_DEVICE_OUT_SPEAKER_SAFE;
4207        } else if (isStreamActive(AUDIO_STREAM_MUSIC, SONIFICATION_RESPECTFUL_AFTER_MUSIC_DELAY)) {
4208            // while media is playing (or has recently played), use the same device
4209            device = getDeviceForStrategy(STRATEGY_MEDIA, false /*fromCache*/);
4210        } else {
4211            // when media is not playing anymore, fall back on the sonification behavior
4212            device = getDeviceForStrategy(STRATEGY_SONIFICATION, false /*fromCache*/);
4213            //user "safe" speaker if available instead of normal speaker to avoid triggering
4214            //other acoustic safety mechanisms for notification
4215            if (device == AUDIO_DEVICE_OUT_SPEAKER && (availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPEAKER_SAFE))
4216                device = AUDIO_DEVICE_OUT_SPEAKER_SAFE;
4217        }
4218
4219        break;
4220
4221    case STRATEGY_DTMF:
4222        if (!isInCall()) {
4223            // when off call, DTMF strategy follows the same rules as MEDIA strategy
4224            device = getDeviceForStrategy(STRATEGY_MEDIA, false /*fromCache*/);
4225            break;
4226        }
4227        // when in call, DTMF and PHONE strategies follow the same rules
4228        // FALL THROUGH
4229
4230    case STRATEGY_PHONE:
4231        // Force use of only devices on primary output if:
4232        // - in call AND
4233        //   - cannot route from voice call RX OR
4234        //   - audio HAL version is < 3.0 and TX device is on the primary HW module
4235        if (mPhoneState == AUDIO_MODE_IN_CALL) {
4236            audio_devices_t txDevice = getDeviceForInputSource(AUDIO_SOURCE_VOICE_COMMUNICATION);
4237            sp<AudioOutputDescriptor> hwOutputDesc = mOutputs.valueFor(mPrimaryOutput);
4238            if (((mAvailableInputDevices.types() &
4239                    AUDIO_DEVICE_IN_TELEPHONY_RX & ~AUDIO_DEVICE_BIT_IN) == 0) ||
4240                    (((txDevice & availablePrimaryInputDevices() & ~AUDIO_DEVICE_BIT_IN) != 0) &&
4241                         (hwOutputDesc->getAudioPort()->mModule->mHalVersion <
4242                             AUDIO_DEVICE_API_VERSION_3_0))) {
4243                availableOutputDeviceTypes = availablePrimaryOutputDevices();
4244            }
4245        }
4246        // for phone strategy, we first consider the forced use and then the available devices by order
4247        // of priority
4248        switch (mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION]) {
4249        case AUDIO_POLICY_FORCE_BT_SCO:
4250            if (!isInCall() || strategy != STRATEGY_DTMF) {
4251                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_SCO_CARKIT;
4252                if (device) break;
4253            }
4254            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_SCO_HEADSET;
4255            if (device) break;
4256            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_SCO;
4257            if (device) break;
4258            // if SCO device is requested but no SCO device is available, fall back to default case
4259            // FALL THROUGH
4260
4261        default:    // FORCE_NONE
4262            // when not in a phone call, phone strategy should route STREAM_VOICE_CALL to A2DP
4263            if (!isInCall() &&
4264                    (mForceUse[AUDIO_POLICY_FORCE_FOR_MEDIA] != AUDIO_POLICY_FORCE_NO_BT_A2DP) &&
4265                    (getA2dpOutput() != 0)) {
4266                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP;
4267                if (device) break;
4268                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES;
4269                if (device) break;
4270            }
4271            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_WIRED_HEADPHONE;
4272            if (device) break;
4273            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_WIRED_HEADSET;
4274            if (device) break;
4275            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_DEVICE;
4276            if (device) break;
4277            if (mPhoneState != AUDIO_MODE_IN_CALL) {
4278                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_ACCESSORY;
4279                if (device) break;
4280                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_DGTL_DOCK_HEADSET;
4281                if (device) break;
4282                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_AUX_DIGITAL;
4283                if (device) break;
4284                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_ANLG_DOCK_HEADSET;
4285                if (device) break;
4286            }
4287            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_EARPIECE;
4288            if (device) break;
4289            device = mDefaultOutputDevice->mDeviceType;
4290            if (device == AUDIO_DEVICE_NONE) {
4291                ALOGE("getDeviceForStrategy() no device found for STRATEGY_PHONE");
4292            }
4293            break;
4294
4295        case AUDIO_POLICY_FORCE_SPEAKER:
4296            // when not in a phone call, phone strategy should route STREAM_VOICE_CALL to
4297            // A2DP speaker when forcing to speaker output
4298            if (!isInCall() &&
4299                    (mForceUse[AUDIO_POLICY_FORCE_FOR_MEDIA] != AUDIO_POLICY_FORCE_NO_BT_A2DP) &&
4300                    (getA2dpOutput() != 0)) {
4301                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_SPEAKER;
4302                if (device) break;
4303            }
4304            if (mPhoneState != AUDIO_MODE_IN_CALL) {
4305                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_ACCESSORY;
4306                if (device) break;
4307                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_DEVICE;
4308                if (device) break;
4309                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_DGTL_DOCK_HEADSET;
4310                if (device) break;
4311                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_AUX_DIGITAL;
4312                if (device) break;
4313                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_ANLG_DOCK_HEADSET;
4314                if (device) break;
4315            }
4316            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_LINE;
4317            if (device) break;
4318            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPEAKER;
4319            if (device) break;
4320            device = mDefaultOutputDevice->mDeviceType;
4321            if (device == AUDIO_DEVICE_NONE) {
4322                ALOGE("getDeviceForStrategy() no device found for STRATEGY_PHONE, FORCE_SPEAKER");
4323            }
4324            break;
4325        }
4326    break;
4327
4328    case STRATEGY_SONIFICATION:
4329
4330        // If incall, just select the STRATEGY_PHONE device: The rest of the behavior is handled by
4331        // handleIncallSonification().
4332        if (isInCall()) {
4333            device = getDeviceForStrategy(STRATEGY_PHONE, false /*fromCache*/);
4334            break;
4335        }
4336        // FALL THROUGH
4337
4338    case STRATEGY_ENFORCED_AUDIBLE:
4339        // strategy STRATEGY_ENFORCED_AUDIBLE uses same routing policy as STRATEGY_SONIFICATION
4340        // except:
4341        //   - when in call where it doesn't default to STRATEGY_PHONE behavior
4342        //   - in countries where not enforced in which case it follows STRATEGY_MEDIA
4343
4344        if ((strategy == STRATEGY_SONIFICATION) ||
4345                (mForceUse[AUDIO_POLICY_FORCE_FOR_SYSTEM] == AUDIO_POLICY_FORCE_SYSTEM_ENFORCED)) {
4346            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPEAKER;
4347            if (device == AUDIO_DEVICE_NONE) {
4348                ALOGE("getDeviceForStrategy() speaker device not found for STRATEGY_SONIFICATION");
4349            }
4350        }
4351        // The second device used for sonification is the same as the device used by media strategy
4352        // FALL THROUGH
4353
4354    // FIXME: STRATEGY_ACCESSIBILITY and STRATEGY_REROUTING follow STRATEGY_MEDIA for now
4355    case STRATEGY_ACCESSIBILITY:
4356        if (strategy == STRATEGY_ACCESSIBILITY) {
4357            // do not route accessibility prompts to a digital output currently configured with a
4358            // compressed format as they would likely not be mixed and dropped.
4359            for (size_t i = 0; i < mOutputs.size(); i++) {
4360                sp<AudioOutputDescriptor> desc = mOutputs.valueAt(i);
4361                audio_devices_t devices = desc->device() &
4362                    (AUDIO_DEVICE_OUT_HDMI | AUDIO_DEVICE_OUT_SPDIF | AUDIO_DEVICE_OUT_HDMI_ARC);
4363                if (desc->isActive() && !audio_is_linear_pcm(desc->mFormat) &&
4364                        devices != AUDIO_DEVICE_NONE) {
4365                    availableOutputDeviceTypes = availableOutputDeviceTypes & ~devices;
4366                }
4367            }
4368        }
4369        // FALL THROUGH
4370
4371    case STRATEGY_REROUTING:
4372    case STRATEGY_MEDIA: {
4373        uint32_t device2 = AUDIO_DEVICE_NONE;
4374        if (strategy != STRATEGY_SONIFICATION) {
4375            // no sonification on remote submix (e.g. WFD)
4376            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_REMOTE_SUBMIX;
4377        }
4378        if ((device2 == AUDIO_DEVICE_NONE) &&
4379                (mForceUse[AUDIO_POLICY_FORCE_FOR_MEDIA] != AUDIO_POLICY_FORCE_NO_BT_A2DP) &&
4380                (getA2dpOutput() != 0)) {
4381            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP;
4382            if (device2 == AUDIO_DEVICE_NONE) {
4383                device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES;
4384            }
4385            if (device2 == AUDIO_DEVICE_NONE) {
4386                device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_SPEAKER;
4387            }
4388        }
4389        if ((device2 == AUDIO_DEVICE_NONE) &&
4390            (mForceUse[AUDIO_POLICY_FORCE_FOR_MEDIA] == AUDIO_POLICY_FORCE_SPEAKER)) {
4391            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPEAKER;
4392        }
4393        if (device2 == AUDIO_DEVICE_NONE) {
4394            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_WIRED_HEADPHONE;
4395        }
4396        if ((device2 == AUDIO_DEVICE_NONE)) {
4397            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_LINE;
4398        }
4399        if (device2 == AUDIO_DEVICE_NONE) {
4400            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_WIRED_HEADSET;
4401        }
4402        if (device2 == AUDIO_DEVICE_NONE) {
4403            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_ACCESSORY;
4404        }
4405        if (device2 == AUDIO_DEVICE_NONE) {
4406            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_DEVICE;
4407        }
4408        if (device2 == AUDIO_DEVICE_NONE) {
4409            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_DGTL_DOCK_HEADSET;
4410        }
4411        if ((device2 == AUDIO_DEVICE_NONE) && (strategy != STRATEGY_SONIFICATION)) {
4412            // no sonification on aux digital (e.g. HDMI)
4413            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_AUX_DIGITAL;
4414        }
4415        if ((device2 == AUDIO_DEVICE_NONE) &&
4416                (mForceUse[AUDIO_POLICY_FORCE_FOR_DOCK] == AUDIO_POLICY_FORCE_ANALOG_DOCK)) {
4417            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_ANLG_DOCK_HEADSET;
4418        }
4419        if (device2 == AUDIO_DEVICE_NONE) {
4420            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPEAKER;
4421        }
4422        int device3 = AUDIO_DEVICE_NONE;
4423        if (strategy == STRATEGY_MEDIA) {
4424            // ARC, SPDIF and AUX_LINE can co-exist with others.
4425            device3 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_HDMI_ARC;
4426            device3 |= (availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPDIF);
4427            device3 |= (availableOutputDeviceTypes & AUDIO_DEVICE_OUT_AUX_LINE);
4428        }
4429
4430        device2 |= device3;
4431        // device is DEVICE_OUT_SPEAKER if we come from case STRATEGY_SONIFICATION or
4432        // STRATEGY_ENFORCED_AUDIBLE, AUDIO_DEVICE_NONE otherwise
4433        device |= device2;
4434
4435        // If hdmi system audio mode is on, remove speaker out of output list.
4436        if ((strategy == STRATEGY_MEDIA) &&
4437            (mForceUse[AUDIO_POLICY_FORCE_FOR_HDMI_SYSTEM_AUDIO] ==
4438                AUDIO_POLICY_FORCE_HDMI_SYSTEM_AUDIO_ENFORCED)) {
4439            device &= ~AUDIO_DEVICE_OUT_SPEAKER;
4440        }
4441
4442        if (device) break;
4443        device = mDefaultOutputDevice->mDeviceType;
4444        if (device == AUDIO_DEVICE_NONE) {
4445            ALOGE("getDeviceForStrategy() no device found for STRATEGY_MEDIA");
4446        }
4447        } break;
4448
4449    default:
4450        ALOGW("getDeviceForStrategy() unknown strategy: %d", strategy);
4451        break;
4452    }
4453
4454    ALOGVV("getDeviceForStrategy() strategy %d, device %x", strategy, device);
4455    return device;
4456}
4457
4458void AudioPolicyManager::updateDevicesAndOutputs()
4459{
4460    for (int i = 0; i < NUM_STRATEGIES; i++) {
4461        mDeviceForStrategy[i] = getDeviceForStrategy((routing_strategy)i, false /*fromCache*/);
4462    }
4463    mPreviousOutputs = mOutputs;
4464}
4465
4466uint32_t AudioPolicyManager::checkDeviceMuteStrategies(sp<AudioOutputDescriptor> outputDesc,
4467                                                       audio_devices_t prevDevice,
4468                                                       uint32_t delayMs)
4469{
4470    // mute/unmute strategies using an incompatible device combination
4471    // if muting, wait for the audio in pcm buffer to be drained before proceeding
4472    // if unmuting, unmute only after the specified delay
4473    if (outputDesc->isDuplicated()) {
4474        return 0;
4475    }
4476
4477    uint32_t muteWaitMs = 0;
4478    audio_devices_t device = outputDesc->device();
4479    bool shouldMute = outputDesc->isActive() && (popcount(device) >= 2);
4480
4481    for (size_t i = 0; i < NUM_STRATEGIES; i++) {
4482        audio_devices_t curDevice = getDeviceForStrategy((routing_strategy)i, false /*fromCache*/);
4483        curDevice = curDevice & outputDesc->mProfile->mSupportedDevices.types();
4484        bool mute = shouldMute && (curDevice & device) && (curDevice != device);
4485        bool doMute = false;
4486
4487        if (mute && !outputDesc->mStrategyMutedByDevice[i]) {
4488            doMute = true;
4489            outputDesc->mStrategyMutedByDevice[i] = true;
4490        } else if (!mute && outputDesc->mStrategyMutedByDevice[i]){
4491            doMute = true;
4492            outputDesc->mStrategyMutedByDevice[i] = false;
4493        }
4494        if (doMute) {
4495            for (size_t j = 0; j < mOutputs.size(); j++) {
4496                sp<AudioOutputDescriptor> desc = mOutputs.valueAt(j);
4497                // skip output if it does not share any device with current output
4498                if ((desc->supportedDevices() & outputDesc->supportedDevices())
4499                        == AUDIO_DEVICE_NONE) {
4500                    continue;
4501                }
4502                audio_io_handle_t curOutput = mOutputs.keyAt(j);
4503                ALOGVV("checkDeviceMuteStrategies() %s strategy %d (curDevice %04x) on output %d",
4504                      mute ? "muting" : "unmuting", i, curDevice, curOutput);
4505                setStrategyMute((routing_strategy)i, mute, curOutput, mute ? 0 : delayMs);
4506                if (desc->isStrategyActive((routing_strategy)i)) {
4507                    if (mute) {
4508                        // FIXME: should not need to double latency if volume could be applied
4509                        // immediately by the audioflinger mixer. We must account for the delay
4510                        // between now and the next time the audioflinger thread for this output
4511                        // will process a buffer (which corresponds to one buffer size,
4512                        // usually 1/2 or 1/4 of the latency).
4513                        if (muteWaitMs < desc->latency() * 2) {
4514                            muteWaitMs = desc->latency() * 2;
4515                        }
4516                    }
4517                }
4518            }
4519        }
4520    }
4521
4522    // temporary mute output if device selection changes to avoid volume bursts due to
4523    // different per device volumes
4524    if (outputDesc->isActive() && (device != prevDevice)) {
4525        if (muteWaitMs < outputDesc->latency() * 2) {
4526            muteWaitMs = outputDesc->latency() * 2;
4527        }
4528        for (size_t i = 0; i < NUM_STRATEGIES; i++) {
4529            if (outputDesc->isStrategyActive((routing_strategy)i)) {
4530                setStrategyMute((routing_strategy)i, true, outputDesc->mIoHandle);
4531                // do tempMute unmute after twice the mute wait time
4532                setStrategyMute((routing_strategy)i, false, outputDesc->mIoHandle,
4533                                muteWaitMs *2, device);
4534            }
4535        }
4536    }
4537
4538    // wait for the PCM output buffers to empty before proceeding with the rest of the command
4539    if (muteWaitMs > delayMs) {
4540        muteWaitMs -= delayMs;
4541        usleep(muteWaitMs * 1000);
4542        return muteWaitMs;
4543    }
4544    return 0;
4545}
4546
4547uint32_t AudioPolicyManager::setOutputDevice(audio_io_handle_t output,
4548                                             audio_devices_t device,
4549                                             bool force,
4550                                             int delayMs,
4551                                             audio_patch_handle_t *patchHandle,
4552                                             const char* address)
4553{
4554    ALOGV("setOutputDevice() output %d device %04x delayMs %d", output, device, delayMs);
4555    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
4556    AudioParameter param;
4557    uint32_t muteWaitMs;
4558
4559    if (outputDesc->isDuplicated()) {
4560        muteWaitMs = setOutputDevice(outputDesc->mOutput1->mIoHandle, device, force, delayMs);
4561        muteWaitMs += setOutputDevice(outputDesc->mOutput2->mIoHandle, device, force, delayMs);
4562        return muteWaitMs;
4563    }
4564    // no need to proceed if new device is not AUDIO_DEVICE_NONE and not supported by current
4565    // output profile
4566    if ((device != AUDIO_DEVICE_NONE) &&
4567            ((device & outputDesc->mProfile->mSupportedDevices.types()) == 0)) {
4568        return 0;
4569    }
4570
4571    // filter devices according to output selected
4572    device = (audio_devices_t)(device & outputDesc->mProfile->mSupportedDevices.types());
4573
4574    audio_devices_t prevDevice = outputDesc->mDevice;
4575
4576    ALOGV("setOutputDevice() prevDevice %04x", prevDevice);
4577
4578    if (device != AUDIO_DEVICE_NONE) {
4579        outputDesc->mDevice = device;
4580    }
4581    muteWaitMs = checkDeviceMuteStrategies(outputDesc, prevDevice, delayMs);
4582
4583    // Do not change the routing if:
4584    //      the requested device is AUDIO_DEVICE_NONE
4585    //      OR the requested device is the same as current device
4586    //  AND force is not specified
4587    //  AND the output is connected by a valid audio patch.
4588    // Doing this check here allows the caller to call setOutputDevice() without conditions
4589    if ((device == AUDIO_DEVICE_NONE || device == prevDevice) && !force &&
4590            outputDesc->mPatchHandle != 0) {
4591        ALOGV("setOutputDevice() setting same device %04x or null device for output %d",
4592              device, output);
4593        return muteWaitMs;
4594    }
4595
4596    ALOGV("setOutputDevice() changing device");
4597
4598    // do the routing
4599    if (device == AUDIO_DEVICE_NONE) {
4600        resetOutputDevice(output, delayMs, NULL);
4601    } else {
4602        DeviceVector deviceList = (address == NULL) ?
4603                mAvailableOutputDevices.getDevicesFromType(device)
4604                : mAvailableOutputDevices.getDevicesFromTypeAddr(device, String8(address));
4605        if (!deviceList.isEmpty()) {
4606            struct audio_patch patch;
4607            outputDesc->toAudioPortConfig(&patch.sources[0]);
4608            patch.num_sources = 1;
4609            patch.num_sinks = 0;
4610            for (size_t i = 0; i < deviceList.size() && i < AUDIO_PATCH_PORTS_MAX; i++) {
4611                deviceList.itemAt(i)->toAudioPortConfig(&patch.sinks[i]);
4612                patch.num_sinks++;
4613            }
4614            ssize_t index;
4615            if (patchHandle && *patchHandle != AUDIO_PATCH_HANDLE_NONE) {
4616                index = mAudioPatches.indexOfKey(*patchHandle);
4617            } else {
4618                index = mAudioPatches.indexOfKey(outputDesc->mPatchHandle);
4619            }
4620            sp< AudioPatch> patchDesc;
4621            audio_patch_handle_t afPatchHandle = AUDIO_PATCH_HANDLE_NONE;
4622            if (index >= 0) {
4623                patchDesc = mAudioPatches.valueAt(index);
4624                afPatchHandle = patchDesc->mAfPatchHandle;
4625            }
4626
4627            status_t status = mpClientInterface->createAudioPatch(&patch,
4628                                                                   &afPatchHandle,
4629                                                                   delayMs);
4630            ALOGV("setOutputDevice() createAudioPatch returned %d patchHandle %d"
4631                    "num_sources %d num_sinks %d",
4632                                       status, afPatchHandle, patch.num_sources, patch.num_sinks);
4633            if (status == NO_ERROR) {
4634                if (index < 0) {
4635                    patchDesc = new AudioPatch((audio_patch_handle_t)nextUniqueId(),
4636                                               &patch, mUidCached);
4637                    addAudioPatch(patchDesc->mHandle, patchDesc);
4638                } else {
4639                    patchDesc->mPatch = patch;
4640                }
4641                patchDesc->mAfPatchHandle = afPatchHandle;
4642                patchDesc->mUid = mUidCached;
4643                if (patchHandle) {
4644                    *patchHandle = patchDesc->mHandle;
4645                }
4646                outputDesc->mPatchHandle = patchDesc->mHandle;
4647                nextAudioPortGeneration();
4648                mpClientInterface->onAudioPatchListUpdate();
4649            }
4650        }
4651
4652        // inform all input as well
4653        for (size_t i = 0; i < mInputs.size(); i++) {
4654            const sp<AudioInputDescriptor>  inputDescriptor = mInputs.valueAt(i);
4655            if (!isVirtualInputDevice(inputDescriptor->mDevice)) {
4656                AudioParameter inputCmd = AudioParameter();
4657                ALOGV("%s: inform input %d of device:%d", __func__,
4658                      inputDescriptor->mIoHandle, device);
4659                inputCmd.addInt(String8(AudioParameter::keyRouting),device);
4660                mpClientInterface->setParameters(inputDescriptor->mIoHandle,
4661                                                 inputCmd.toString(),
4662                                                 delayMs);
4663            }
4664        }
4665    }
4666
4667    // update stream volumes according to new device
4668    applyStreamVolumes(output, device, delayMs);
4669
4670    return muteWaitMs;
4671}
4672
4673status_t AudioPolicyManager::resetOutputDevice(audio_io_handle_t output,
4674                                               int delayMs,
4675                                               audio_patch_handle_t *patchHandle)
4676{
4677    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
4678    ssize_t index;
4679    if (patchHandle) {
4680        index = mAudioPatches.indexOfKey(*patchHandle);
4681    } else {
4682        index = mAudioPatches.indexOfKey(outputDesc->mPatchHandle);
4683    }
4684    if (index < 0) {
4685        return INVALID_OPERATION;
4686    }
4687    sp< AudioPatch> patchDesc = mAudioPatches.valueAt(index);
4688    status_t status = mpClientInterface->releaseAudioPatch(patchDesc->mAfPatchHandle, delayMs);
4689    ALOGV("resetOutputDevice() releaseAudioPatch returned %d", status);
4690    outputDesc->mPatchHandle = 0;
4691    removeAudioPatch(patchDesc->mHandle);
4692    nextAudioPortGeneration();
4693    mpClientInterface->onAudioPatchListUpdate();
4694    return status;
4695}
4696
4697status_t AudioPolicyManager::setInputDevice(audio_io_handle_t input,
4698                                            audio_devices_t device,
4699                                            bool force,
4700                                            audio_patch_handle_t *patchHandle)
4701{
4702    status_t status = NO_ERROR;
4703
4704    sp<AudioInputDescriptor> inputDesc = mInputs.valueFor(input);
4705    if ((device != AUDIO_DEVICE_NONE) && ((device != inputDesc->mDevice) || force)) {
4706        inputDesc->mDevice = device;
4707
4708        DeviceVector deviceList = mAvailableInputDevices.getDevicesFromType(device);
4709        if (!deviceList.isEmpty()) {
4710            struct audio_patch patch;
4711            inputDesc->toAudioPortConfig(&patch.sinks[0]);
4712            // AUDIO_SOURCE_HOTWORD is for internal use only:
4713            // handled as AUDIO_SOURCE_VOICE_RECOGNITION by the audio HAL
4714            if (patch.sinks[0].ext.mix.usecase.source == AUDIO_SOURCE_HOTWORD &&
4715                    !inputDesc->mIsSoundTrigger) {
4716                patch.sinks[0].ext.mix.usecase.source = AUDIO_SOURCE_VOICE_RECOGNITION;
4717            }
4718            patch.num_sinks = 1;
4719            //only one input device for now
4720            deviceList.itemAt(0)->toAudioPortConfig(&patch.sources[0]);
4721            patch.num_sources = 1;
4722            ssize_t index;
4723            if (patchHandle && *patchHandle != AUDIO_PATCH_HANDLE_NONE) {
4724                index = mAudioPatches.indexOfKey(*patchHandle);
4725            } else {
4726                index = mAudioPatches.indexOfKey(inputDesc->mPatchHandle);
4727            }
4728            sp< AudioPatch> patchDesc;
4729            audio_patch_handle_t afPatchHandle = AUDIO_PATCH_HANDLE_NONE;
4730            if (index >= 0) {
4731                patchDesc = mAudioPatches.valueAt(index);
4732                afPatchHandle = patchDesc->mAfPatchHandle;
4733            }
4734
4735            status_t status = mpClientInterface->createAudioPatch(&patch,
4736                                                                  &afPatchHandle,
4737                                                                  0);
4738            ALOGV("setInputDevice() createAudioPatch returned %d patchHandle %d",
4739                                                                          status, afPatchHandle);
4740            if (status == NO_ERROR) {
4741                if (index < 0) {
4742                    patchDesc = new AudioPatch((audio_patch_handle_t)nextUniqueId(),
4743                                               &patch, mUidCached);
4744                    addAudioPatch(patchDesc->mHandle, patchDesc);
4745                } else {
4746                    patchDesc->mPatch = patch;
4747                }
4748                patchDesc->mAfPatchHandle = afPatchHandle;
4749                patchDesc->mUid = mUidCached;
4750                if (patchHandle) {
4751                    *patchHandle = patchDesc->mHandle;
4752                }
4753                inputDesc->mPatchHandle = patchDesc->mHandle;
4754                nextAudioPortGeneration();
4755                mpClientInterface->onAudioPatchListUpdate();
4756            }
4757        }
4758    }
4759    return status;
4760}
4761
4762status_t AudioPolicyManager::resetInputDevice(audio_io_handle_t input,
4763                                              audio_patch_handle_t *patchHandle)
4764{
4765    sp<AudioInputDescriptor> inputDesc = mInputs.valueFor(input);
4766    ssize_t index;
4767    if (patchHandle) {
4768        index = mAudioPatches.indexOfKey(*patchHandle);
4769    } else {
4770        index = mAudioPatches.indexOfKey(inputDesc->mPatchHandle);
4771    }
4772    if (index < 0) {
4773        return INVALID_OPERATION;
4774    }
4775    sp< AudioPatch> patchDesc = mAudioPatches.valueAt(index);
4776    status_t status = mpClientInterface->releaseAudioPatch(patchDesc->mAfPatchHandle, 0);
4777    ALOGV("resetInputDevice() releaseAudioPatch returned %d", status);
4778    inputDesc->mPatchHandle = 0;
4779    removeAudioPatch(patchDesc->mHandle);
4780    nextAudioPortGeneration();
4781    mpClientInterface->onAudioPatchListUpdate();
4782    return status;
4783}
4784
4785sp<AudioPolicyManager::IOProfile> AudioPolicyManager::getInputProfile(audio_devices_t device,
4786                                                   uint32_t& samplingRate,
4787                                                   audio_format_t format,
4788                                                   audio_channel_mask_t channelMask,
4789                                                   audio_input_flags_t flags)
4790{
4791    // Choose an input profile based on the requested capture parameters: select the first available
4792    // profile supporting all requested parameters.
4793
4794    for (size_t i = 0; i < mHwModules.size(); i++)
4795    {
4796        if (mHwModules[i]->mHandle == 0) {
4797            continue;
4798        }
4799        for (size_t j = 0; j < mHwModules[i]->mInputProfiles.size(); j++)
4800        {
4801            sp<IOProfile> profile = mHwModules[i]->mInputProfiles[j];
4802            // profile->log();
4803            if (profile->isCompatibleProfile(device, samplingRate,
4804                                             &samplingRate /*updatedSamplingRate*/,
4805                                             format, channelMask, (audio_output_flags_t) flags)) {
4806                return profile;
4807            }
4808        }
4809    }
4810    return NULL;
4811}
4812
4813audio_devices_t AudioPolicyManager::getDeviceForInputSource(audio_source_t inputSource)
4814{
4815    uint32_t device = AUDIO_DEVICE_NONE;
4816    audio_devices_t availableDeviceTypes = mAvailableInputDevices.types() &
4817                                            ~AUDIO_DEVICE_BIT_IN;
4818    switch (inputSource) {
4819    case AUDIO_SOURCE_VOICE_UPLINK:
4820      if (availableDeviceTypes & AUDIO_DEVICE_IN_VOICE_CALL) {
4821          device = AUDIO_DEVICE_IN_VOICE_CALL;
4822          break;
4823      }
4824      break;
4825
4826    case AUDIO_SOURCE_DEFAULT:
4827    case AUDIO_SOURCE_MIC:
4828    if (availableDeviceTypes & AUDIO_DEVICE_IN_BLUETOOTH_A2DP) {
4829        device = AUDIO_DEVICE_IN_BLUETOOTH_A2DP;
4830    } else if (availableDeviceTypes & AUDIO_DEVICE_IN_WIRED_HEADSET) {
4831        device = AUDIO_DEVICE_IN_WIRED_HEADSET;
4832    } else if (availableDeviceTypes & AUDIO_DEVICE_IN_USB_DEVICE) {
4833        device = AUDIO_DEVICE_IN_USB_DEVICE;
4834    } else if (availableDeviceTypes & AUDIO_DEVICE_IN_BUILTIN_MIC) {
4835        device = AUDIO_DEVICE_IN_BUILTIN_MIC;
4836    }
4837    break;
4838
4839    case AUDIO_SOURCE_VOICE_COMMUNICATION:
4840        // Allow only use of devices on primary input if in call and HAL does not support routing
4841        // to voice call path.
4842        if ((mPhoneState == AUDIO_MODE_IN_CALL) &&
4843                (mAvailableOutputDevices.types() & AUDIO_DEVICE_OUT_TELEPHONY_TX) == 0) {
4844            availableDeviceTypes = availablePrimaryInputDevices() & ~AUDIO_DEVICE_BIT_IN;
4845        }
4846
4847        switch (mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION]) {
4848        case AUDIO_POLICY_FORCE_BT_SCO:
4849            // if SCO device is requested but no SCO device is available, fall back to default case
4850            if (availableDeviceTypes & AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET) {
4851                device = AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET;
4852                break;
4853            }
4854            // FALL THROUGH
4855
4856        default:    // FORCE_NONE
4857            if (availableDeviceTypes & AUDIO_DEVICE_IN_WIRED_HEADSET) {
4858                device = AUDIO_DEVICE_IN_WIRED_HEADSET;
4859            } else if (availableDeviceTypes & AUDIO_DEVICE_IN_USB_DEVICE) {
4860                device = AUDIO_DEVICE_IN_USB_DEVICE;
4861            } else if (availableDeviceTypes & AUDIO_DEVICE_IN_BUILTIN_MIC) {
4862                device = AUDIO_DEVICE_IN_BUILTIN_MIC;
4863            }
4864            break;
4865
4866        case AUDIO_POLICY_FORCE_SPEAKER:
4867            if (availableDeviceTypes & AUDIO_DEVICE_IN_BACK_MIC) {
4868                device = AUDIO_DEVICE_IN_BACK_MIC;
4869            } else if (availableDeviceTypes & AUDIO_DEVICE_IN_BUILTIN_MIC) {
4870                device = AUDIO_DEVICE_IN_BUILTIN_MIC;
4871            }
4872            break;
4873        }
4874        break;
4875
4876    case AUDIO_SOURCE_VOICE_RECOGNITION:
4877    case AUDIO_SOURCE_HOTWORD:
4878        if (mForceUse[AUDIO_POLICY_FORCE_FOR_RECORD] == AUDIO_POLICY_FORCE_BT_SCO &&
4879                availableDeviceTypes & AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET) {
4880            device = AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET;
4881        } else if (availableDeviceTypes & AUDIO_DEVICE_IN_WIRED_HEADSET) {
4882            device = AUDIO_DEVICE_IN_WIRED_HEADSET;
4883        } else if (availableDeviceTypes & AUDIO_DEVICE_IN_USB_DEVICE) {
4884            device = AUDIO_DEVICE_IN_USB_DEVICE;
4885        } else if (availableDeviceTypes & AUDIO_DEVICE_IN_BUILTIN_MIC) {
4886            device = AUDIO_DEVICE_IN_BUILTIN_MIC;
4887        }
4888        break;
4889    case AUDIO_SOURCE_CAMCORDER:
4890        if (availableDeviceTypes & AUDIO_DEVICE_IN_BACK_MIC) {
4891            device = AUDIO_DEVICE_IN_BACK_MIC;
4892        } else if (availableDeviceTypes & AUDIO_DEVICE_IN_BUILTIN_MIC) {
4893            device = AUDIO_DEVICE_IN_BUILTIN_MIC;
4894        }
4895        break;
4896    case AUDIO_SOURCE_VOICE_DOWNLINK:
4897    case AUDIO_SOURCE_VOICE_CALL:
4898        if (availableDeviceTypes & AUDIO_DEVICE_IN_VOICE_CALL) {
4899            device = AUDIO_DEVICE_IN_VOICE_CALL;
4900        }
4901        break;
4902    case AUDIO_SOURCE_REMOTE_SUBMIX:
4903        if (availableDeviceTypes & AUDIO_DEVICE_IN_REMOTE_SUBMIX) {
4904            device = AUDIO_DEVICE_IN_REMOTE_SUBMIX;
4905        }
4906        break;
4907     case AUDIO_SOURCE_FM_TUNER:
4908        if (availableDeviceTypes & AUDIO_DEVICE_IN_FM_TUNER) {
4909            device = AUDIO_DEVICE_IN_FM_TUNER;
4910        }
4911        break;
4912    default:
4913        ALOGW("getDeviceForInputSource() invalid input source %d", inputSource);
4914        break;
4915    }
4916    ALOGV("getDeviceForInputSource()input source %d, device %08x", inputSource, device);
4917    return device;
4918}
4919
4920bool AudioPolicyManager::isVirtualInputDevice(audio_devices_t device)
4921{
4922    if ((device & AUDIO_DEVICE_BIT_IN) != 0) {
4923        device &= ~AUDIO_DEVICE_BIT_IN;
4924        if ((popcount(device) == 1) && ((device & ~APM_AUDIO_IN_DEVICE_VIRTUAL_ALL) == 0))
4925            return true;
4926    }
4927    return false;
4928}
4929
4930bool AudioPolicyManager::deviceDistinguishesOnAddress(audio_devices_t device) {
4931    return ((device & APM_AUDIO_DEVICE_MATCH_ADDRESS_ALL) != 0);
4932}
4933
4934audio_io_handle_t AudioPolicyManager::getActiveInput(bool ignoreVirtualInputs)
4935{
4936    for (size_t i = 0; i < mInputs.size(); i++) {
4937        const sp<AudioInputDescriptor>  input_descriptor = mInputs.valueAt(i);
4938        if ((input_descriptor->mRefCount > 0)
4939                && (!ignoreVirtualInputs || !isVirtualInputDevice(input_descriptor->mDevice))) {
4940            return mInputs.keyAt(i);
4941        }
4942    }
4943    return 0;
4944}
4945
4946uint32_t AudioPolicyManager::activeInputsCount() const
4947{
4948    uint32_t count = 0;
4949    for (size_t i = 0; i < mInputs.size(); i++) {
4950        const sp<AudioInputDescriptor>  desc = mInputs.valueAt(i);
4951        if (desc->mRefCount > 0) {
4952            return count++;
4953        }
4954    }
4955    return count;
4956}
4957
4958
4959audio_devices_t AudioPolicyManager::getDeviceForVolume(audio_devices_t device)
4960{
4961    if (device == AUDIO_DEVICE_NONE) {
4962        // this happens when forcing a route update and no track is active on an output.
4963        // In this case the returned category is not important.
4964        device =  AUDIO_DEVICE_OUT_SPEAKER;
4965    } else if (popcount(device) > 1) {
4966        // Multiple device selection is either:
4967        //  - speaker + one other device: give priority to speaker in this case.
4968        //  - one A2DP device + another device: happens with duplicated output. In this case
4969        // retain the device on the A2DP output as the other must not correspond to an active
4970        // selection if not the speaker.
4971        //  - HDMI-CEC system audio mode only output: give priority to available item in order.
4972        if (device & AUDIO_DEVICE_OUT_SPEAKER) {
4973            device = AUDIO_DEVICE_OUT_SPEAKER;
4974        } else if (device & AUDIO_DEVICE_OUT_HDMI_ARC) {
4975            device = AUDIO_DEVICE_OUT_HDMI_ARC;
4976        } else if (device & AUDIO_DEVICE_OUT_AUX_LINE) {
4977            device = AUDIO_DEVICE_OUT_AUX_LINE;
4978        } else if (device & AUDIO_DEVICE_OUT_SPDIF) {
4979            device = AUDIO_DEVICE_OUT_SPDIF;
4980        } else {
4981            device = (audio_devices_t)(device & AUDIO_DEVICE_OUT_ALL_A2DP);
4982        }
4983    }
4984
4985    /*SPEAKER_SAFE is an alias of SPEAKER for purposes of volume control*/
4986    if (device == AUDIO_DEVICE_OUT_SPEAKER_SAFE)
4987        device = AUDIO_DEVICE_OUT_SPEAKER;
4988
4989    ALOGW_IF(popcount(device) != 1,
4990            "getDeviceForVolume() invalid device combination: %08x",
4991            device);
4992
4993    return device;
4994}
4995
4996AudioPolicyManager::device_category AudioPolicyManager::getDeviceCategory(audio_devices_t device)
4997{
4998    switch(getDeviceForVolume(device)) {
4999        case AUDIO_DEVICE_OUT_EARPIECE:
5000            return DEVICE_CATEGORY_EARPIECE;
5001        case AUDIO_DEVICE_OUT_WIRED_HEADSET:
5002        case AUDIO_DEVICE_OUT_WIRED_HEADPHONE:
5003        case AUDIO_DEVICE_OUT_BLUETOOTH_SCO:
5004        case AUDIO_DEVICE_OUT_BLUETOOTH_SCO_HEADSET:
5005        case AUDIO_DEVICE_OUT_BLUETOOTH_A2DP:
5006        case AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES:
5007            return DEVICE_CATEGORY_HEADSET;
5008        case AUDIO_DEVICE_OUT_LINE:
5009        case AUDIO_DEVICE_OUT_AUX_DIGITAL:
5010        /*USB?  Remote submix?*/
5011            return DEVICE_CATEGORY_EXT_MEDIA;
5012        case AUDIO_DEVICE_OUT_SPEAKER:
5013        case AUDIO_DEVICE_OUT_BLUETOOTH_SCO_CARKIT:
5014        case AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_SPEAKER:
5015        case AUDIO_DEVICE_OUT_USB_ACCESSORY:
5016        case AUDIO_DEVICE_OUT_USB_DEVICE:
5017        case AUDIO_DEVICE_OUT_REMOTE_SUBMIX:
5018        default:
5019            return DEVICE_CATEGORY_SPEAKER;
5020    }
5021}
5022
5023/* static */
5024float AudioPolicyManager::volIndexToAmpl(audio_devices_t device, const StreamDescriptor& streamDesc,
5025        int indexInUi)
5026{
5027    device_category deviceCategory = getDeviceCategory(device);
5028    const VolumeCurvePoint *curve = streamDesc.mVolumeCurve[deviceCategory];
5029
5030    // the volume index in the UI is relative to the min and max volume indices for this stream type
5031    int nbSteps = 1 + curve[VOLMAX].mIndex -
5032            curve[VOLMIN].mIndex;
5033    int volIdx = (nbSteps * (indexInUi - streamDesc.mIndexMin)) /
5034            (streamDesc.mIndexMax - streamDesc.mIndexMin);
5035
5036    // find what part of the curve this index volume belongs to, or if it's out of bounds
5037    int segment = 0;
5038    if (volIdx < curve[VOLMIN].mIndex) {         // out of bounds
5039        return 0.0f;
5040    } else if (volIdx < curve[VOLKNEE1].mIndex) {
5041        segment = 0;
5042    } else if (volIdx < curve[VOLKNEE2].mIndex) {
5043        segment = 1;
5044    } else if (volIdx <= curve[VOLMAX].mIndex) {
5045        segment = 2;
5046    } else {                                                               // out of bounds
5047        return 1.0f;
5048    }
5049
5050    // linear interpolation in the attenuation table in dB
5051    float decibels = curve[segment].mDBAttenuation +
5052            ((float)(volIdx - curve[segment].mIndex)) *
5053                ( (curve[segment+1].mDBAttenuation -
5054                        curve[segment].mDBAttenuation) /
5055                    ((float)(curve[segment+1].mIndex -
5056                            curve[segment].mIndex)) );
5057
5058    float amplification = exp( decibels * 0.115129f); // exp( dB * ln(10) / 20 )
5059
5060    ALOGVV("VOLUME vol index=[%d %d %d], dB=[%.1f %.1f %.1f] ampl=%.5f",
5061            curve[segment].mIndex, volIdx,
5062            curve[segment+1].mIndex,
5063            curve[segment].mDBAttenuation,
5064            decibels,
5065            curve[segment+1].mDBAttenuation,
5066            amplification);
5067
5068    return amplification;
5069}
5070
5071const AudioPolicyManager::VolumeCurvePoint
5072    AudioPolicyManager::sDefaultVolumeCurve[AudioPolicyManager::VOLCNT] = {
5073    {1, -49.5f}, {33, -33.5f}, {66, -17.0f}, {100, 0.0f}
5074};
5075
5076const AudioPolicyManager::VolumeCurvePoint
5077    AudioPolicyManager::sDefaultMediaVolumeCurve[AudioPolicyManager::VOLCNT] = {
5078    {1, -58.0f}, {20, -40.0f}, {60, -17.0f}, {100, 0.0f}
5079};
5080
5081const AudioPolicyManager::VolumeCurvePoint
5082    AudioPolicyManager::sExtMediaSystemVolumeCurve[AudioPolicyManager::VOLCNT] = {
5083    {1, -58.0f}, {20, -40.0f}, {60, -21.0f}, {100, -10.0f}
5084};
5085
5086const AudioPolicyManager::VolumeCurvePoint
5087    AudioPolicyManager::sSpeakerMediaVolumeCurve[AudioPolicyManager::VOLCNT] = {
5088    {1, -56.0f}, {20, -34.0f}, {60, -11.0f}, {100, 0.0f}
5089};
5090
5091const AudioPolicyManager::VolumeCurvePoint
5092    AudioPolicyManager::sSpeakerMediaVolumeCurveDrc[AudioPolicyManager::VOLCNT] = {
5093    {1, -55.0f}, {20, -43.0f}, {86, -12.0f}, {100, 0.0f}
5094};
5095
5096const AudioPolicyManager::VolumeCurvePoint
5097    AudioPolicyManager::sSpeakerSonificationVolumeCurve[AudioPolicyManager::VOLCNT] = {
5098    {1, -29.7f}, {33, -20.1f}, {66, -10.2f}, {100, 0.0f}
5099};
5100
5101const AudioPolicyManager::VolumeCurvePoint
5102    AudioPolicyManager::sSpeakerSonificationVolumeCurveDrc[AudioPolicyManager::VOLCNT] = {
5103    {1, -35.7f}, {33, -26.1f}, {66, -13.2f}, {100, 0.0f}
5104};
5105
5106// AUDIO_STREAM_SYSTEM, AUDIO_STREAM_ENFORCED_AUDIBLE and AUDIO_STREAM_DTMF volume tracks
5107// AUDIO_STREAM_RING on phones and AUDIO_STREAM_MUSIC on tablets.
5108// AUDIO_STREAM_DTMF tracks AUDIO_STREAM_VOICE_CALL while in call (See AudioService.java).
5109// The range is constrained between -24dB and -6dB over speaker and -30dB and -18dB over headset.
5110
5111const AudioPolicyManager::VolumeCurvePoint
5112    AudioPolicyManager::sDefaultSystemVolumeCurve[AudioPolicyManager::VOLCNT] = {
5113    {1, -24.0f}, {33, -18.0f}, {66, -12.0f}, {100, -6.0f}
5114};
5115
5116const AudioPolicyManager::VolumeCurvePoint
5117    AudioPolicyManager::sDefaultSystemVolumeCurveDrc[AudioPolicyManager::VOLCNT] = {
5118    {1, -34.0f}, {33, -24.0f}, {66, -15.0f}, {100, -6.0f}
5119};
5120
5121const AudioPolicyManager::VolumeCurvePoint
5122    AudioPolicyManager::sHeadsetSystemVolumeCurve[AudioPolicyManager::VOLCNT] = {
5123    {1, -30.0f}, {33, -26.0f}, {66, -22.0f}, {100, -18.0f}
5124};
5125
5126const AudioPolicyManager::VolumeCurvePoint
5127    AudioPolicyManager::sDefaultVoiceVolumeCurve[AudioPolicyManager::VOLCNT] = {
5128    {0, -42.0f}, {33, -28.0f}, {66, -14.0f}, {100, 0.0f}
5129};
5130
5131const AudioPolicyManager::VolumeCurvePoint
5132    AudioPolicyManager::sSpeakerVoiceVolumeCurve[AudioPolicyManager::VOLCNT] = {
5133    {0, -24.0f}, {33, -16.0f}, {66, -8.0f}, {100, 0.0f}
5134};
5135
5136const AudioPolicyManager::VolumeCurvePoint
5137    AudioPolicyManager::sLinearVolumeCurve[AudioPolicyManager::VOLCNT] = {
5138    {0, -96.0f}, {33, -68.0f}, {66, -34.0f}, {100, 0.0f}
5139};
5140
5141const AudioPolicyManager::VolumeCurvePoint
5142    AudioPolicyManager::sSilentVolumeCurve[AudioPolicyManager::VOLCNT] = {
5143    {0, -96.0f}, {1, -96.0f}, {2, -96.0f}, {100, -96.0f}
5144};
5145
5146const AudioPolicyManager::VolumeCurvePoint
5147    AudioPolicyManager::sFullScaleVolumeCurve[AudioPolicyManager::VOLCNT] = {
5148    {0, 0.0f}, {1, 0.0f}, {2, 0.0f}, {100, 0.0f}
5149};
5150
5151const AudioPolicyManager::VolumeCurvePoint
5152            *AudioPolicyManager::sVolumeProfiles[AUDIO_STREAM_CNT]
5153                                                   [AudioPolicyManager::DEVICE_CATEGORY_CNT] = {
5154    { // AUDIO_STREAM_VOICE_CALL
5155        sDefaultVoiceVolumeCurve, // DEVICE_CATEGORY_HEADSET
5156        sSpeakerVoiceVolumeCurve, // DEVICE_CATEGORY_SPEAKER
5157        sDefaultVoiceVolumeCurve, // DEVICE_CATEGORY_EARPIECE
5158        sDefaultMediaVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
5159    },
5160    { // AUDIO_STREAM_SYSTEM
5161        sHeadsetSystemVolumeCurve, // DEVICE_CATEGORY_HEADSET
5162        sDefaultSystemVolumeCurve, // DEVICE_CATEGORY_SPEAKER
5163        sDefaultSystemVolumeCurve,  // DEVICE_CATEGORY_EARPIECE
5164        sExtMediaSystemVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
5165    },
5166    { // AUDIO_STREAM_RING
5167        sDefaultVolumeCurve, // DEVICE_CATEGORY_HEADSET
5168        sSpeakerSonificationVolumeCurve, // DEVICE_CATEGORY_SPEAKER
5169        sDefaultVolumeCurve,  // DEVICE_CATEGORY_EARPIECE
5170        sExtMediaSystemVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
5171    },
5172    { // AUDIO_STREAM_MUSIC
5173        sDefaultMediaVolumeCurve, // DEVICE_CATEGORY_HEADSET
5174        sSpeakerMediaVolumeCurve, // DEVICE_CATEGORY_SPEAKER
5175        sDefaultMediaVolumeCurve, // DEVICE_CATEGORY_EARPIECE
5176        sDefaultMediaVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
5177    },
5178    { // AUDIO_STREAM_ALARM
5179        sDefaultVolumeCurve, // DEVICE_CATEGORY_HEADSET
5180        sSpeakerSonificationVolumeCurve, // DEVICE_CATEGORY_SPEAKER
5181        sDefaultVolumeCurve,  // DEVICE_CATEGORY_EARPIECE
5182        sExtMediaSystemVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
5183    },
5184    { // AUDIO_STREAM_NOTIFICATION
5185        sDefaultVolumeCurve, // DEVICE_CATEGORY_HEADSET
5186        sSpeakerSonificationVolumeCurve, // DEVICE_CATEGORY_SPEAKER
5187        sDefaultVolumeCurve,  // DEVICE_CATEGORY_EARPIECE
5188        sExtMediaSystemVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
5189    },
5190    { // AUDIO_STREAM_BLUETOOTH_SCO
5191        sDefaultVoiceVolumeCurve, // DEVICE_CATEGORY_HEADSET
5192        sSpeakerVoiceVolumeCurve, // DEVICE_CATEGORY_SPEAKER
5193        sDefaultVoiceVolumeCurve, // DEVICE_CATEGORY_EARPIECE
5194        sDefaultMediaVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
5195    },
5196    { // AUDIO_STREAM_ENFORCED_AUDIBLE
5197        sHeadsetSystemVolumeCurve, // DEVICE_CATEGORY_HEADSET
5198        sDefaultSystemVolumeCurve, // DEVICE_CATEGORY_SPEAKER
5199        sDefaultSystemVolumeCurve, // DEVICE_CATEGORY_EARPIECE
5200        sExtMediaSystemVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
5201    },
5202    {  // AUDIO_STREAM_DTMF
5203        sHeadsetSystemVolumeCurve, // DEVICE_CATEGORY_HEADSET
5204        sDefaultSystemVolumeCurve, // DEVICE_CATEGORY_SPEAKER
5205        sDefaultSystemVolumeCurve, // DEVICE_CATEGORY_EARPIECE
5206        sExtMediaSystemVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
5207    },
5208    { // AUDIO_STREAM_TTS
5209      // "Transmitted Through Speaker": always silent except on DEVICE_CATEGORY_SPEAKER
5210        sSilentVolumeCurve, // DEVICE_CATEGORY_HEADSET
5211        sLinearVolumeCurve, // DEVICE_CATEGORY_SPEAKER
5212        sSilentVolumeCurve, // DEVICE_CATEGORY_EARPIECE
5213        sSilentVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
5214    },
5215    { // AUDIO_STREAM_ACCESSIBILITY
5216        sDefaultMediaVolumeCurve, // DEVICE_CATEGORY_HEADSET
5217        sSpeakerMediaVolumeCurve, // DEVICE_CATEGORY_SPEAKER
5218        sDefaultMediaVolumeCurve, // DEVICE_CATEGORY_EARPIECE
5219        sDefaultMediaVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
5220    },
5221    { // AUDIO_STREAM_REROUTING
5222        sFullScaleVolumeCurve, // DEVICE_CATEGORY_HEADSET
5223        sFullScaleVolumeCurve, // DEVICE_CATEGORY_SPEAKER
5224        sFullScaleVolumeCurve, // DEVICE_CATEGORY_EARPIECE
5225        sFullScaleVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
5226    },
5227    { // AUDIO_STREAM_PATCH
5228        sFullScaleVolumeCurve, // DEVICE_CATEGORY_HEADSET
5229        sFullScaleVolumeCurve, // DEVICE_CATEGORY_SPEAKER
5230        sFullScaleVolumeCurve, // DEVICE_CATEGORY_EARPIECE
5231        sFullScaleVolumeCurve  // DEVICE_CATEGORY_EXT_MEDIA
5232    },
5233};
5234
5235void AudioPolicyManager::initializeVolumeCurves()
5236{
5237    for (int i = 0; i < AUDIO_STREAM_CNT; i++) {
5238        for (int j = 0; j < DEVICE_CATEGORY_CNT; j++) {
5239            mStreams[i].mVolumeCurve[j] =
5240                    sVolumeProfiles[i][j];
5241        }
5242    }
5243
5244    // Check availability of DRC on speaker path: if available, override some of the speaker curves
5245    if (mSpeakerDrcEnabled) {
5246        mStreams[AUDIO_STREAM_SYSTEM].mVolumeCurve[DEVICE_CATEGORY_SPEAKER] =
5247                sDefaultSystemVolumeCurveDrc;
5248        mStreams[AUDIO_STREAM_RING].mVolumeCurve[DEVICE_CATEGORY_SPEAKER] =
5249                sSpeakerSonificationVolumeCurveDrc;
5250        mStreams[AUDIO_STREAM_ALARM].mVolumeCurve[DEVICE_CATEGORY_SPEAKER] =
5251                sSpeakerSonificationVolumeCurveDrc;
5252        mStreams[AUDIO_STREAM_NOTIFICATION].mVolumeCurve[DEVICE_CATEGORY_SPEAKER] =
5253                sSpeakerSonificationVolumeCurveDrc;
5254        mStreams[AUDIO_STREAM_MUSIC].mVolumeCurve[DEVICE_CATEGORY_SPEAKER] =
5255                sSpeakerMediaVolumeCurveDrc;
5256        mStreams[AUDIO_STREAM_ACCESSIBILITY].mVolumeCurve[DEVICE_CATEGORY_SPEAKER] =
5257                sSpeakerMediaVolumeCurveDrc;
5258    }
5259}
5260
5261float AudioPolicyManager::computeVolume(audio_stream_type_t stream,
5262                                            int index,
5263                                            audio_io_handle_t output,
5264                                            audio_devices_t device)
5265{
5266    float volume = 1.0;
5267    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
5268    StreamDescriptor &streamDesc = mStreams[stream];
5269
5270    if (device == AUDIO_DEVICE_NONE) {
5271        device = outputDesc->device();
5272    }
5273
5274    volume = volIndexToAmpl(device, streamDesc, index);
5275
5276    // if a headset is connected, apply the following rules to ring tones and notifications
5277    // to avoid sound level bursts in user's ears:
5278    // - always attenuate ring tones and notifications volume by 6dB
5279    // - if music is playing, always limit the volume to current music volume,
5280    // with a minimum threshold at -36dB so that notification is always perceived.
5281    const routing_strategy stream_strategy = getStrategy(stream);
5282    if ((device & (AUDIO_DEVICE_OUT_BLUETOOTH_A2DP |
5283            AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES |
5284            AUDIO_DEVICE_OUT_WIRED_HEADSET |
5285            AUDIO_DEVICE_OUT_WIRED_HEADPHONE)) &&
5286        ((stream_strategy == STRATEGY_SONIFICATION)
5287                || (stream_strategy == STRATEGY_SONIFICATION_RESPECTFUL)
5288                || (stream == AUDIO_STREAM_SYSTEM)
5289                || ((stream_strategy == STRATEGY_ENFORCED_AUDIBLE) &&
5290                    (mForceUse[AUDIO_POLICY_FORCE_FOR_SYSTEM] == AUDIO_POLICY_FORCE_NONE))) &&
5291        streamDesc.mCanBeMuted) {
5292        volume *= SONIFICATION_HEADSET_VOLUME_FACTOR;
5293        // when the phone is ringing we must consider that music could have been paused just before
5294        // by the music application and behave as if music was active if the last music track was
5295        // just stopped
5296        if (isStreamActive(AUDIO_STREAM_MUSIC, SONIFICATION_HEADSET_MUSIC_DELAY) ||
5297                mLimitRingtoneVolume) {
5298            audio_devices_t musicDevice = getDeviceForStrategy(STRATEGY_MEDIA, true /*fromCache*/);
5299            float musicVol = computeVolume(AUDIO_STREAM_MUSIC,
5300                               mStreams[AUDIO_STREAM_MUSIC].getVolumeIndex(musicDevice),
5301                               output,
5302                               musicDevice);
5303            float minVol = (musicVol > SONIFICATION_HEADSET_VOLUME_MIN) ?
5304                                musicVol : SONIFICATION_HEADSET_VOLUME_MIN;
5305            if (volume > minVol) {
5306                volume = minVol;
5307                ALOGV("computeVolume limiting volume to %f musicVol %f", minVol, musicVol);
5308            }
5309        }
5310    }
5311
5312    return volume;
5313}
5314
5315status_t AudioPolicyManager::checkAndSetVolume(audio_stream_type_t stream,
5316                                                   int index,
5317                                                   audio_io_handle_t output,
5318                                                   audio_devices_t device,
5319                                                   int delayMs,
5320                                                   bool force)
5321{
5322
5323    // do not change actual stream volume if the stream is muted
5324    if (mOutputs.valueFor(output)->mMuteCount[stream] != 0) {
5325        ALOGVV("checkAndSetVolume() stream %d muted count %d",
5326              stream, mOutputs.valueFor(output)->mMuteCount[stream]);
5327        return NO_ERROR;
5328    }
5329
5330    // do not change in call volume if bluetooth is connected and vice versa
5331    if ((stream == AUDIO_STREAM_VOICE_CALL &&
5332            mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION] == AUDIO_POLICY_FORCE_BT_SCO) ||
5333        (stream == AUDIO_STREAM_BLUETOOTH_SCO &&
5334                mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION] != AUDIO_POLICY_FORCE_BT_SCO)) {
5335        ALOGV("checkAndSetVolume() cannot set stream %d volume with force use = %d for comm",
5336             stream, mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION]);
5337        return INVALID_OPERATION;
5338    }
5339
5340    float volume = computeVolume(stream, index, output, device);
5341    // We actually change the volume if:
5342    // - the float value returned by computeVolume() changed
5343    // - the force flag is set
5344    if (volume != mOutputs.valueFor(output)->mCurVolume[stream] ||
5345            force) {
5346        mOutputs.valueFor(output)->mCurVolume[stream] = volume;
5347        ALOGVV("checkAndSetVolume() for output %d stream %d, volume %f, delay %d", output, stream, volume, delayMs);
5348        // Force VOICE_CALL to track BLUETOOTH_SCO stream volume when bluetooth audio is
5349        // enabled
5350        if (stream == AUDIO_STREAM_BLUETOOTH_SCO) {
5351            mpClientInterface->setStreamVolume(AUDIO_STREAM_VOICE_CALL, volume, output, delayMs);
5352        }
5353        mpClientInterface->setStreamVolume(stream, volume, output, delayMs);
5354    }
5355
5356    if (stream == AUDIO_STREAM_VOICE_CALL ||
5357        stream == AUDIO_STREAM_BLUETOOTH_SCO) {
5358        float voiceVolume;
5359        // Force voice volume to max for bluetooth SCO as volume is managed by the headset
5360        if (stream == AUDIO_STREAM_VOICE_CALL) {
5361            voiceVolume = (float)index/(float)mStreams[stream].mIndexMax;
5362        } else {
5363            voiceVolume = 1.0;
5364        }
5365
5366        if (voiceVolume != mLastVoiceVolume && output == mPrimaryOutput) {
5367            mpClientInterface->setVoiceVolume(voiceVolume, delayMs);
5368            mLastVoiceVolume = voiceVolume;
5369        }
5370    }
5371
5372    return NO_ERROR;
5373}
5374
5375void AudioPolicyManager::applyStreamVolumes(audio_io_handle_t output,
5376                                                audio_devices_t device,
5377                                                int delayMs,
5378                                                bool force)
5379{
5380    ALOGVV("applyStreamVolumes() for output %d and device %x", output, device);
5381
5382    for (int stream = 0; stream < AUDIO_STREAM_CNT; stream++) {
5383        if (stream == AUDIO_STREAM_PATCH) {
5384            continue;
5385        }
5386        checkAndSetVolume((audio_stream_type_t)stream,
5387                          mStreams[stream].getVolumeIndex(device),
5388                          output,
5389                          device,
5390                          delayMs,
5391                          force);
5392    }
5393}
5394
5395void AudioPolicyManager::setStrategyMute(routing_strategy strategy,
5396                                             bool on,
5397                                             audio_io_handle_t output,
5398                                             int delayMs,
5399                                             audio_devices_t device)
5400{
5401    ALOGVV("setStrategyMute() strategy %d, mute %d, output %d", strategy, on, output);
5402    for (int stream = 0; stream < AUDIO_STREAM_CNT; stream++) {
5403        if (stream == AUDIO_STREAM_PATCH) {
5404            continue;
5405        }
5406        if (getStrategy((audio_stream_type_t)stream) == strategy) {
5407            setStreamMute((audio_stream_type_t)stream, on, output, delayMs, device);
5408        }
5409    }
5410}
5411
5412void AudioPolicyManager::setStreamMute(audio_stream_type_t stream,
5413                                           bool on,
5414                                           audio_io_handle_t output,
5415                                           int delayMs,
5416                                           audio_devices_t device)
5417{
5418    StreamDescriptor &streamDesc = mStreams[stream];
5419    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
5420    if (device == AUDIO_DEVICE_NONE) {
5421        device = outputDesc->device();
5422    }
5423
5424    ALOGVV("setStreamMute() stream %d, mute %d, output %d, mMuteCount %d device %04x",
5425          stream, on, output, outputDesc->mMuteCount[stream], device);
5426
5427    if (on) {
5428        if (outputDesc->mMuteCount[stream] == 0) {
5429            if (streamDesc.mCanBeMuted &&
5430                    ((stream != AUDIO_STREAM_ENFORCED_AUDIBLE) ||
5431                     (mForceUse[AUDIO_POLICY_FORCE_FOR_SYSTEM] == AUDIO_POLICY_FORCE_NONE))) {
5432                checkAndSetVolume(stream, 0, output, device, delayMs);
5433            }
5434        }
5435        // increment mMuteCount after calling checkAndSetVolume() so that volume change is not ignored
5436        outputDesc->mMuteCount[stream]++;
5437    } else {
5438        if (outputDesc->mMuteCount[stream] == 0) {
5439            ALOGV("setStreamMute() unmuting non muted stream!");
5440            return;
5441        }
5442        if (--outputDesc->mMuteCount[stream] == 0) {
5443            checkAndSetVolume(stream,
5444                              streamDesc.getVolumeIndex(device),
5445                              output,
5446                              device,
5447                              delayMs);
5448        }
5449    }
5450}
5451
5452void AudioPolicyManager::handleIncallSonification(audio_stream_type_t stream,
5453                                                      bool starting, bool stateChange)
5454{
5455    // if the stream pertains to sonification strategy and we are in call we must
5456    // mute the stream if it is low visibility. If it is high visibility, we must play a tone
5457    // in the device used for phone strategy and play the tone if the selected device does not
5458    // interfere with the device used for phone strategy
5459    // if stateChange is true, we are called from setPhoneState() and we must mute or unmute as
5460    // many times as there are active tracks on the output
5461    const routing_strategy stream_strategy = getStrategy(stream);
5462    if ((stream_strategy == STRATEGY_SONIFICATION) ||
5463            ((stream_strategy == STRATEGY_SONIFICATION_RESPECTFUL))) {
5464        sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(mPrimaryOutput);
5465        ALOGV("handleIncallSonification() stream %d starting %d device %x stateChange %d",
5466                stream, starting, outputDesc->mDevice, stateChange);
5467        if (outputDesc->mRefCount[stream]) {
5468            int muteCount = 1;
5469            if (stateChange) {
5470                muteCount = outputDesc->mRefCount[stream];
5471            }
5472            if (audio_is_low_visibility(stream)) {
5473                ALOGV("handleIncallSonification() low visibility, muteCount %d", muteCount);
5474                for (int i = 0; i < muteCount; i++) {
5475                    setStreamMute(stream, starting, mPrimaryOutput);
5476                }
5477            } else {
5478                ALOGV("handleIncallSonification() high visibility");
5479                if (outputDesc->device() &
5480                        getDeviceForStrategy(STRATEGY_PHONE, true /*fromCache*/)) {
5481                    ALOGV("handleIncallSonification() high visibility muted, muteCount %d", muteCount);
5482                    for (int i = 0; i < muteCount; i++) {
5483                        setStreamMute(stream, starting, mPrimaryOutput);
5484                    }
5485                }
5486                if (starting) {
5487                    mpClientInterface->startTone(AUDIO_POLICY_TONE_IN_CALL_NOTIFICATION,
5488                                                 AUDIO_STREAM_VOICE_CALL);
5489                } else {
5490                    mpClientInterface->stopTone();
5491                }
5492            }
5493        }
5494    }
5495}
5496
5497bool AudioPolicyManager::isInCall()
5498{
5499    return isStateInCall(mPhoneState);
5500}
5501
5502bool AudioPolicyManager::isStateInCall(int state) {
5503    return ((state == AUDIO_MODE_IN_CALL) ||
5504            (state == AUDIO_MODE_IN_COMMUNICATION));
5505}
5506
5507uint32_t AudioPolicyManager::getMaxEffectsCpuLoad()
5508{
5509    return MAX_EFFECTS_CPU_LOAD;
5510}
5511
5512uint32_t AudioPolicyManager::getMaxEffectsMemory()
5513{
5514    return MAX_EFFECTS_MEMORY;
5515}
5516
5517
5518// --- AudioOutputDescriptor class implementation
5519
5520AudioPolicyManager::AudioOutputDescriptor::AudioOutputDescriptor(
5521        const sp<IOProfile>& profile)
5522    : mId(0), mIoHandle(0), mLatency(0),
5523    mFlags((audio_output_flags_t)0), mDevice(AUDIO_DEVICE_NONE), mPatchHandle(0),
5524    mOutput1(0), mOutput2(0), mProfile(profile), mDirectOpenCount(0)
5525{
5526    // clear usage count for all stream types
5527    for (int i = 0; i < AUDIO_STREAM_CNT; i++) {
5528        mRefCount[i] = 0;
5529        mCurVolume[i] = -1.0;
5530        mMuteCount[i] = 0;
5531        mStopTime[i] = 0;
5532    }
5533    for (int i = 0; i < NUM_STRATEGIES; i++) {
5534        mStrategyMutedByDevice[i] = false;
5535    }
5536    if (profile != NULL) {
5537        mFlags = (audio_output_flags_t)profile->mFlags;
5538        mSamplingRate = profile->pickSamplingRate();
5539        mFormat = profile->pickFormat();
5540        mChannelMask = profile->pickChannelMask();
5541        if (profile->mGains.size() > 0) {
5542            profile->mGains[0]->getDefaultConfig(&mGain);
5543        }
5544    }
5545}
5546
5547audio_devices_t AudioPolicyManager::AudioOutputDescriptor::device() const
5548{
5549    if (isDuplicated()) {
5550        return (audio_devices_t)(mOutput1->mDevice | mOutput2->mDevice);
5551    } else {
5552        return mDevice;
5553    }
5554}
5555
5556uint32_t AudioPolicyManager::AudioOutputDescriptor::latency()
5557{
5558    if (isDuplicated()) {
5559        return (mOutput1->mLatency > mOutput2->mLatency) ? mOutput1->mLatency : mOutput2->mLatency;
5560    } else {
5561        return mLatency;
5562    }
5563}
5564
5565bool AudioPolicyManager::AudioOutputDescriptor::sharesHwModuleWith(
5566        const sp<AudioOutputDescriptor> outputDesc)
5567{
5568    if (isDuplicated()) {
5569        return mOutput1->sharesHwModuleWith(outputDesc) || mOutput2->sharesHwModuleWith(outputDesc);
5570    } else if (outputDesc->isDuplicated()){
5571        return sharesHwModuleWith(outputDesc->mOutput1) || sharesHwModuleWith(outputDesc->mOutput2);
5572    } else {
5573        return (mProfile->mModule == outputDesc->mProfile->mModule);
5574    }
5575}
5576
5577void AudioPolicyManager::AudioOutputDescriptor::changeRefCount(audio_stream_type_t stream,
5578                                                                   int delta)
5579{
5580    // forward usage count change to attached outputs
5581    if (isDuplicated()) {
5582        mOutput1->changeRefCount(stream, delta);
5583        mOutput2->changeRefCount(stream, delta);
5584    }
5585    if ((delta + (int)mRefCount[stream]) < 0) {
5586        ALOGW("changeRefCount() invalid delta %d for stream %d, refCount %d",
5587              delta, stream, mRefCount[stream]);
5588        mRefCount[stream] = 0;
5589        return;
5590    }
5591    mRefCount[stream] += delta;
5592    ALOGV("changeRefCount() stream %d, count %d", stream, mRefCount[stream]);
5593}
5594
5595audio_devices_t AudioPolicyManager::AudioOutputDescriptor::supportedDevices()
5596{
5597    if (isDuplicated()) {
5598        return (audio_devices_t)(mOutput1->supportedDevices() | mOutput2->supportedDevices());
5599    } else {
5600        return mProfile->mSupportedDevices.types() ;
5601    }
5602}
5603
5604bool AudioPolicyManager::AudioOutputDescriptor::isActive(uint32_t inPastMs) const
5605{
5606    return isStrategyActive(NUM_STRATEGIES, inPastMs);
5607}
5608
5609bool AudioPolicyManager::AudioOutputDescriptor::isStrategyActive(routing_strategy strategy,
5610                                                                       uint32_t inPastMs,
5611                                                                       nsecs_t sysTime) const
5612{
5613    if ((sysTime == 0) && (inPastMs != 0)) {
5614        sysTime = systemTime();
5615    }
5616    for (int i = 0; i < (int)AUDIO_STREAM_CNT; i++) {
5617        if (i == AUDIO_STREAM_PATCH) {
5618            continue;
5619        }
5620        if (((getStrategy((audio_stream_type_t)i) == strategy) ||
5621                (NUM_STRATEGIES == strategy)) &&
5622                isStreamActive((audio_stream_type_t)i, inPastMs, sysTime)) {
5623            return true;
5624        }
5625    }
5626    return false;
5627}
5628
5629bool AudioPolicyManager::AudioOutputDescriptor::isStreamActive(audio_stream_type_t stream,
5630                                                                       uint32_t inPastMs,
5631                                                                       nsecs_t sysTime) const
5632{
5633    if (mRefCount[stream] != 0) {
5634        return true;
5635    }
5636    if (inPastMs == 0) {
5637        return false;
5638    }
5639    if (sysTime == 0) {
5640        sysTime = systemTime();
5641    }
5642    if (ns2ms(sysTime - mStopTime[stream]) < inPastMs) {
5643        return true;
5644    }
5645    return false;
5646}
5647
5648void AudioPolicyManager::AudioOutputDescriptor::toAudioPortConfig(
5649                                                 struct audio_port_config *dstConfig,
5650                                                 const struct audio_port_config *srcConfig) const
5651{
5652    ALOG_ASSERT(!isDuplicated(), "toAudioPortConfig() called on duplicated output %d", mIoHandle);
5653
5654    dstConfig->config_mask = AUDIO_PORT_CONFIG_SAMPLE_RATE|AUDIO_PORT_CONFIG_CHANNEL_MASK|
5655                            AUDIO_PORT_CONFIG_FORMAT|AUDIO_PORT_CONFIG_GAIN;
5656    if (srcConfig != NULL) {
5657        dstConfig->config_mask |= srcConfig->config_mask;
5658    }
5659    AudioPortConfig::toAudioPortConfig(dstConfig, srcConfig);
5660
5661    dstConfig->id = mId;
5662    dstConfig->role = AUDIO_PORT_ROLE_SOURCE;
5663    dstConfig->type = AUDIO_PORT_TYPE_MIX;
5664    dstConfig->ext.mix.hw_module = mProfile->mModule->mHandle;
5665    dstConfig->ext.mix.handle = mIoHandle;
5666    dstConfig->ext.mix.usecase.stream = AUDIO_STREAM_DEFAULT;
5667}
5668
5669void AudioPolicyManager::AudioOutputDescriptor::toAudioPort(
5670                                                    struct audio_port *port) const
5671{
5672    ALOG_ASSERT(!isDuplicated(), "toAudioPort() called on duplicated output %d", mIoHandle);
5673    mProfile->toAudioPort(port);
5674    port->id = mId;
5675    toAudioPortConfig(&port->active_config);
5676    port->ext.mix.hw_module = mProfile->mModule->mHandle;
5677    port->ext.mix.handle = mIoHandle;
5678    port->ext.mix.latency_class =
5679            mFlags & AUDIO_OUTPUT_FLAG_FAST ? AUDIO_LATENCY_LOW : AUDIO_LATENCY_NORMAL;
5680}
5681
5682status_t AudioPolicyManager::AudioOutputDescriptor::dump(int fd)
5683{
5684    const size_t SIZE = 256;
5685    char buffer[SIZE];
5686    String8 result;
5687
5688    snprintf(buffer, SIZE, " ID: %d\n", mId);
5689    result.append(buffer);
5690    snprintf(buffer, SIZE, " Sampling rate: %d\n", mSamplingRate);
5691    result.append(buffer);
5692    snprintf(buffer, SIZE, " Format: %08x\n", mFormat);
5693    result.append(buffer);
5694    snprintf(buffer, SIZE, " Channels: %08x\n", mChannelMask);
5695    result.append(buffer);
5696    snprintf(buffer, SIZE, " Latency: %d\n", mLatency);
5697    result.append(buffer);
5698    snprintf(buffer, SIZE, " Flags %08x\n", mFlags);
5699    result.append(buffer);
5700    snprintf(buffer, SIZE, " Devices %08x\n", device());
5701    result.append(buffer);
5702    snprintf(buffer, SIZE, " Stream volume refCount muteCount\n");
5703    result.append(buffer);
5704    for (int i = 0; i < (int)AUDIO_STREAM_CNT; i++) {
5705        snprintf(buffer, SIZE, " %02d     %.03f     %02d       %02d\n",
5706                 i, mCurVolume[i], mRefCount[i], mMuteCount[i]);
5707        result.append(buffer);
5708    }
5709    write(fd, result.string(), result.size());
5710
5711    return NO_ERROR;
5712}
5713
5714// --- AudioInputDescriptor class implementation
5715
5716AudioPolicyManager::AudioInputDescriptor::AudioInputDescriptor(const sp<IOProfile>& profile)
5717    : mId(0), mIoHandle(0),
5718      mDevice(AUDIO_DEVICE_NONE), mPatchHandle(0), mRefCount(0),
5719      mInputSource(AUDIO_SOURCE_DEFAULT), mProfile(profile), mIsSoundTrigger(false)
5720{
5721    if (profile != NULL) {
5722        mSamplingRate = profile->pickSamplingRate();
5723        mFormat = profile->pickFormat();
5724        mChannelMask = profile->pickChannelMask();
5725        if (profile->mGains.size() > 0) {
5726            profile->mGains[0]->getDefaultConfig(&mGain);
5727        }
5728    }
5729}
5730
5731void AudioPolicyManager::AudioInputDescriptor::toAudioPortConfig(
5732                                                   struct audio_port_config *dstConfig,
5733                                                   const struct audio_port_config *srcConfig) const
5734{
5735    ALOG_ASSERT(mProfile != 0,
5736                "toAudioPortConfig() called on input with null profile %d", mIoHandle);
5737    dstConfig->config_mask = AUDIO_PORT_CONFIG_SAMPLE_RATE|AUDIO_PORT_CONFIG_CHANNEL_MASK|
5738                            AUDIO_PORT_CONFIG_FORMAT|AUDIO_PORT_CONFIG_GAIN;
5739    if (srcConfig != NULL) {
5740        dstConfig->config_mask |= srcConfig->config_mask;
5741    }
5742
5743    AudioPortConfig::toAudioPortConfig(dstConfig, srcConfig);
5744
5745    dstConfig->id = mId;
5746    dstConfig->role = AUDIO_PORT_ROLE_SINK;
5747    dstConfig->type = AUDIO_PORT_TYPE_MIX;
5748    dstConfig->ext.mix.hw_module = mProfile->mModule->mHandle;
5749    dstConfig->ext.mix.handle = mIoHandle;
5750    dstConfig->ext.mix.usecase.source = mInputSource;
5751}
5752
5753void AudioPolicyManager::AudioInputDescriptor::toAudioPort(
5754                                                    struct audio_port *port) const
5755{
5756    ALOG_ASSERT(mProfile != 0, "toAudioPort() called on input with null profile %d", mIoHandle);
5757
5758    mProfile->toAudioPort(port);
5759    port->id = mId;
5760    toAudioPortConfig(&port->active_config);
5761    port->ext.mix.hw_module = mProfile->mModule->mHandle;
5762    port->ext.mix.handle = mIoHandle;
5763    port->ext.mix.latency_class = AUDIO_LATENCY_NORMAL;
5764}
5765
5766status_t AudioPolicyManager::AudioInputDescriptor::dump(int fd)
5767{
5768    const size_t SIZE = 256;
5769    char buffer[SIZE];
5770    String8 result;
5771
5772    snprintf(buffer, SIZE, " ID: %d\n", mId);
5773    result.append(buffer);
5774    snprintf(buffer, SIZE, " Sampling rate: %d\n", mSamplingRate);
5775    result.append(buffer);
5776    snprintf(buffer, SIZE, " Format: %d\n", mFormat);
5777    result.append(buffer);
5778    snprintf(buffer, SIZE, " Channels: %08x\n", mChannelMask);
5779    result.append(buffer);
5780    snprintf(buffer, SIZE, " Devices %08x\n", mDevice);
5781    result.append(buffer);
5782    snprintf(buffer, SIZE, " Ref Count %d\n", mRefCount);
5783    result.append(buffer);
5784    snprintf(buffer, SIZE, " Open Ref Count %d\n", mOpenRefCount);
5785    result.append(buffer);
5786
5787    write(fd, result.string(), result.size());
5788
5789    return NO_ERROR;
5790}
5791
5792// --- StreamDescriptor class implementation
5793
5794AudioPolicyManager::StreamDescriptor::StreamDescriptor()
5795    :   mIndexMin(0), mIndexMax(1), mCanBeMuted(true)
5796{
5797    mIndexCur.add(AUDIO_DEVICE_OUT_DEFAULT, 0);
5798}
5799
5800int AudioPolicyManager::StreamDescriptor::getVolumeIndex(audio_devices_t device)
5801{
5802    device = AudioPolicyManager::getDeviceForVolume(device);
5803    // there is always a valid entry for AUDIO_DEVICE_OUT_DEFAULT
5804    if (mIndexCur.indexOfKey(device) < 0) {
5805        device = AUDIO_DEVICE_OUT_DEFAULT;
5806    }
5807    return mIndexCur.valueFor(device);
5808}
5809
5810void AudioPolicyManager::StreamDescriptor::dump(int fd)
5811{
5812    const size_t SIZE = 256;
5813    char buffer[SIZE];
5814    String8 result;
5815
5816    snprintf(buffer, SIZE, "%s         %02d         %02d         ",
5817             mCanBeMuted ? "true " : "false", mIndexMin, mIndexMax);
5818    result.append(buffer);
5819    for (size_t i = 0; i < mIndexCur.size(); i++) {
5820        snprintf(buffer, SIZE, "%04x : %02d, ",
5821                 mIndexCur.keyAt(i),
5822                 mIndexCur.valueAt(i));
5823        result.append(buffer);
5824    }
5825    result.append("\n");
5826
5827    write(fd, result.string(), result.size());
5828}
5829
5830// --- EffectDescriptor class implementation
5831
5832status_t AudioPolicyManager::EffectDescriptor::dump(int fd)
5833{
5834    const size_t SIZE = 256;
5835    char buffer[SIZE];
5836    String8 result;
5837
5838    snprintf(buffer, SIZE, " I/O: %d\n", mIo);
5839    result.append(buffer);
5840    snprintf(buffer, SIZE, " Strategy: %d\n", mStrategy);
5841    result.append(buffer);
5842    snprintf(buffer, SIZE, " Session: %d\n", mSession);
5843    result.append(buffer);
5844    snprintf(buffer, SIZE, " Name: %s\n",  mDesc.name);
5845    result.append(buffer);
5846    snprintf(buffer, SIZE, " %s\n",  mEnabled ? "Enabled" : "Disabled");
5847    result.append(buffer);
5848    write(fd, result.string(), result.size());
5849
5850    return NO_ERROR;
5851}
5852
5853// --- HwModule class implementation
5854
5855AudioPolicyManager::HwModule::HwModule(const char *name)
5856    : mName(strndup(name, AUDIO_HARDWARE_MODULE_ID_MAX_LEN)),
5857      mHalVersion(AUDIO_DEVICE_API_VERSION_MIN), mHandle(0)
5858{
5859}
5860
5861AudioPolicyManager::HwModule::~HwModule()
5862{
5863    for (size_t i = 0; i < mOutputProfiles.size(); i++) {
5864        mOutputProfiles[i]->mSupportedDevices.clear();
5865    }
5866    for (size_t i = 0; i < mInputProfiles.size(); i++) {
5867        mInputProfiles[i]->mSupportedDevices.clear();
5868    }
5869    free((void *)mName);
5870}
5871
5872status_t AudioPolicyManager::HwModule::loadInput(cnode *root)
5873{
5874    cnode *node = root->first_child;
5875
5876    sp<IOProfile> profile = new IOProfile(String8(root->name), AUDIO_PORT_ROLE_SINK, this);
5877
5878    while (node) {
5879        if (strcmp(node->name, SAMPLING_RATES_TAG) == 0) {
5880            profile->loadSamplingRates((char *)node->value);
5881        } else if (strcmp(node->name, FORMATS_TAG) == 0) {
5882            profile->loadFormats((char *)node->value);
5883        } else if (strcmp(node->name, CHANNELS_TAG) == 0) {
5884            profile->loadInChannels((char *)node->value);
5885        } else if (strcmp(node->name, DEVICES_TAG) == 0) {
5886            profile->mSupportedDevices.loadDevicesFromName((char *)node->value,
5887                                                           mDeclaredDevices);
5888        } else if (strcmp(node->name, FLAGS_TAG) == 0) {
5889            profile->mFlags = parseInputFlagNames((char *)node->value);
5890        } else if (strcmp(node->name, GAINS_TAG) == 0) {
5891            profile->loadGains(node);
5892        }
5893        node = node->next;
5894    }
5895    ALOGW_IF(profile->mSupportedDevices.isEmpty(),
5896            "loadInput() invalid supported devices");
5897    ALOGW_IF(profile->mChannelMasks.size() == 0,
5898            "loadInput() invalid supported channel masks");
5899    ALOGW_IF(profile->mSamplingRates.size() == 0,
5900            "loadInput() invalid supported sampling rates");
5901    ALOGW_IF(profile->mFormats.size() == 0,
5902            "loadInput() invalid supported formats");
5903    if (!profile->mSupportedDevices.isEmpty() &&
5904            (profile->mChannelMasks.size() != 0) &&
5905            (profile->mSamplingRates.size() != 0) &&
5906            (profile->mFormats.size() != 0)) {
5907
5908        ALOGV("loadInput() adding input Supported Devices %04x",
5909              profile->mSupportedDevices.types());
5910
5911        mInputProfiles.add(profile);
5912        return NO_ERROR;
5913    } else {
5914        return BAD_VALUE;
5915    }
5916}
5917
5918status_t AudioPolicyManager::HwModule::loadOutput(cnode *root)
5919{
5920    cnode *node = root->first_child;
5921
5922    sp<IOProfile> profile = new IOProfile(String8(root->name), AUDIO_PORT_ROLE_SOURCE, this);
5923
5924    while (node) {
5925        if (strcmp(node->name, SAMPLING_RATES_TAG) == 0) {
5926            profile->loadSamplingRates((char *)node->value);
5927        } else if (strcmp(node->name, FORMATS_TAG) == 0) {
5928            profile->loadFormats((char *)node->value);
5929        } else if (strcmp(node->name, CHANNELS_TAG) == 0) {
5930            profile->loadOutChannels((char *)node->value);
5931        } else if (strcmp(node->name, DEVICES_TAG) == 0) {
5932            profile->mSupportedDevices.loadDevicesFromName((char *)node->value,
5933                                                           mDeclaredDevices);
5934        } else if (strcmp(node->name, FLAGS_TAG) == 0) {
5935            profile->mFlags = parseOutputFlagNames((char *)node->value);
5936        } else if (strcmp(node->name, GAINS_TAG) == 0) {
5937            profile->loadGains(node);
5938        }
5939        node = node->next;
5940    }
5941    ALOGW_IF(profile->mSupportedDevices.isEmpty(),
5942            "loadOutput() invalid supported devices");
5943    ALOGW_IF(profile->mChannelMasks.size() == 0,
5944            "loadOutput() invalid supported channel masks");
5945    ALOGW_IF(profile->mSamplingRates.size() == 0,
5946            "loadOutput() invalid supported sampling rates");
5947    ALOGW_IF(profile->mFormats.size() == 0,
5948            "loadOutput() invalid supported formats");
5949    if (!profile->mSupportedDevices.isEmpty() &&
5950            (profile->mChannelMasks.size() != 0) &&
5951            (profile->mSamplingRates.size() != 0) &&
5952            (profile->mFormats.size() != 0)) {
5953
5954        ALOGV("loadOutput() adding output Supported Devices %04x, mFlags %04x",
5955              profile->mSupportedDevices.types(), profile->mFlags);
5956
5957        mOutputProfiles.add(profile);
5958        return NO_ERROR;
5959    } else {
5960        return BAD_VALUE;
5961    }
5962}
5963
5964status_t AudioPolicyManager::HwModule::loadDevice(cnode *root)
5965{
5966    cnode *node = root->first_child;
5967
5968    audio_devices_t type = AUDIO_DEVICE_NONE;
5969    while (node) {
5970        if (strcmp(node->name, DEVICE_TYPE) == 0) {
5971            type = parseDeviceNames((char *)node->value);
5972            break;
5973        }
5974        node = node->next;
5975    }
5976    if (type == AUDIO_DEVICE_NONE ||
5977            (!audio_is_input_device(type) && !audio_is_output_device(type))) {
5978        ALOGW("loadDevice() bad type %08x", type);
5979        return BAD_VALUE;
5980    }
5981    sp<DeviceDescriptor> deviceDesc = new DeviceDescriptor(String8(root->name), type);
5982    deviceDesc->mModule = this;
5983
5984    node = root->first_child;
5985    while (node) {
5986        if (strcmp(node->name, DEVICE_ADDRESS) == 0) {
5987            deviceDesc->mAddress = String8((char *)node->value);
5988        } else if (strcmp(node->name, CHANNELS_TAG) == 0) {
5989            if (audio_is_input_device(type)) {
5990                deviceDesc->loadInChannels((char *)node->value);
5991            } else {
5992                deviceDesc->loadOutChannels((char *)node->value);
5993            }
5994        } else if (strcmp(node->name, GAINS_TAG) == 0) {
5995            deviceDesc->loadGains(node);
5996        }
5997        node = node->next;
5998    }
5999
6000    ALOGV("loadDevice() adding device name %s type %08x address %s",
6001          deviceDesc->mName.string(), type, deviceDesc->mAddress.string());
6002
6003    mDeclaredDevices.add(deviceDesc);
6004
6005    return NO_ERROR;
6006}
6007
6008void AudioPolicyManager::HwModule::dump(int fd)
6009{
6010    const size_t SIZE = 256;
6011    char buffer[SIZE];
6012    String8 result;
6013
6014    snprintf(buffer, SIZE, "  - name: %s\n", mName);
6015    result.append(buffer);
6016    snprintf(buffer, SIZE, "  - handle: %d\n", mHandle);
6017    result.append(buffer);
6018    snprintf(buffer, SIZE, "  - version: %u.%u\n", mHalVersion >> 8, mHalVersion & 0xFF);
6019    result.append(buffer);
6020    write(fd, result.string(), result.size());
6021    if (mOutputProfiles.size()) {
6022        write(fd, "  - outputs:\n", strlen("  - outputs:\n"));
6023        for (size_t i = 0; i < mOutputProfiles.size(); i++) {
6024            snprintf(buffer, SIZE, "    output %zu:\n", i);
6025            write(fd, buffer, strlen(buffer));
6026            mOutputProfiles[i]->dump(fd);
6027        }
6028    }
6029    if (mInputProfiles.size()) {
6030        write(fd, "  - inputs:\n", strlen("  - inputs:\n"));
6031        for (size_t i = 0; i < mInputProfiles.size(); i++) {
6032            snprintf(buffer, SIZE, "    input %zu:\n", i);
6033            write(fd, buffer, strlen(buffer));
6034            mInputProfiles[i]->dump(fd);
6035        }
6036    }
6037    if (mDeclaredDevices.size()) {
6038        write(fd, "  - devices:\n", strlen("  - devices:\n"));
6039        for (size_t i = 0; i < mDeclaredDevices.size(); i++) {
6040            mDeclaredDevices[i]->dump(fd, 4, i);
6041        }
6042    }
6043}
6044
6045// --- AudioPort class implementation
6046
6047
6048AudioPolicyManager::AudioPort::AudioPort(const String8& name, audio_port_type_t type,
6049          audio_port_role_t role, const sp<HwModule>& module) :
6050    mName(name), mType(type), mRole(role), mModule(module), mFlags(0)
6051{
6052    mUseInChannelMask = ((type == AUDIO_PORT_TYPE_DEVICE) && (role == AUDIO_PORT_ROLE_SOURCE)) ||
6053                    ((type == AUDIO_PORT_TYPE_MIX) && (role == AUDIO_PORT_ROLE_SINK));
6054}
6055
6056void AudioPolicyManager::AudioPort::toAudioPort(struct audio_port *port) const
6057{
6058    port->role = mRole;
6059    port->type = mType;
6060    unsigned int i;
6061    for (i = 0; i < mSamplingRates.size() && i < AUDIO_PORT_MAX_SAMPLING_RATES; i++) {
6062        if (mSamplingRates[i] != 0) {
6063            port->sample_rates[i] = mSamplingRates[i];
6064        }
6065    }
6066    port->num_sample_rates = i;
6067    for (i = 0; i < mChannelMasks.size() && i < AUDIO_PORT_MAX_CHANNEL_MASKS; i++) {
6068        if (mChannelMasks[i] != 0) {
6069            port->channel_masks[i] = mChannelMasks[i];
6070        }
6071    }
6072    port->num_channel_masks = i;
6073    for (i = 0; i < mFormats.size() && i < AUDIO_PORT_MAX_FORMATS; i++) {
6074        if (mFormats[i] != 0) {
6075            port->formats[i] = mFormats[i];
6076        }
6077    }
6078    port->num_formats = i;
6079
6080    ALOGV("AudioPort::toAudioPort() num gains %zu", mGains.size());
6081
6082    for (i = 0; i < mGains.size() && i < AUDIO_PORT_MAX_GAINS; i++) {
6083        port->gains[i] = mGains[i]->mGain;
6084    }
6085    port->num_gains = i;
6086}
6087
6088void AudioPolicyManager::AudioPort::importAudioPort(const sp<AudioPort> port) {
6089    for (size_t k = 0 ; k < port->mSamplingRates.size() ; k++) {
6090        const uint32_t rate = port->mSamplingRates.itemAt(k);
6091        if (rate != 0) { // skip "dynamic" rates
6092            bool hasRate = false;
6093            for (size_t l = 0 ; l < mSamplingRates.size() ; l++) {
6094                if (rate == mSamplingRates.itemAt(l)) {
6095                    hasRate = true;
6096                    break;
6097                }
6098            }
6099            if (!hasRate) { // never import a sampling rate twice
6100                mSamplingRates.add(rate);
6101            }
6102        }
6103    }
6104    for (size_t k = 0 ; k < port->mChannelMasks.size() ; k++) {
6105        const audio_channel_mask_t mask = port->mChannelMasks.itemAt(k);
6106        if (mask != 0) { // skip "dynamic" masks
6107            bool hasMask = false;
6108            for (size_t l = 0 ; l < mChannelMasks.size() ; l++) {
6109                if (mask == mChannelMasks.itemAt(l)) {
6110                    hasMask = true;
6111                    break;
6112                }
6113            }
6114            if (!hasMask) { // never import a channel mask twice
6115                mChannelMasks.add(mask);
6116            }
6117        }
6118    }
6119    for (size_t k = 0 ; k < port->mFormats.size() ; k++) {
6120        const audio_format_t format = port->mFormats.itemAt(k);
6121        if (format != 0) { // skip "dynamic" formats
6122            bool hasFormat = false;
6123            for (size_t l = 0 ; l < mFormats.size() ; l++) {
6124                if (format == mFormats.itemAt(l)) {
6125                    hasFormat = true;
6126                    break;
6127                }
6128            }
6129            if (!hasFormat) { // never import a channel mask twice
6130                mFormats.add(format);
6131            }
6132        }
6133    }
6134    for (size_t k = 0 ; k < port->mGains.size() ; k++) {
6135        sp<AudioGain> gain = port->mGains.itemAt(k);
6136        if (gain != 0) {
6137            bool hasGain = false;
6138            for (size_t l = 0 ; l < mGains.size() ; l++) {
6139                if (gain == mGains.itemAt(l)) {
6140                    hasGain = true;
6141                    break;
6142                }
6143            }
6144            if (!hasGain) { // never import a gain twice
6145                mGains.add(gain);
6146            }
6147        }
6148    }
6149}
6150
6151void AudioPolicyManager::AudioPort::clearCapabilities() {
6152    mChannelMasks.clear();
6153    mFormats.clear();
6154    mSamplingRates.clear();
6155    mGains.clear();
6156}
6157
6158void AudioPolicyManager::AudioPort::loadSamplingRates(char *name)
6159{
6160    char *str = strtok(name, "|");
6161
6162    // by convention, "0' in the first entry in mSamplingRates indicates the supported sampling
6163    // rates should be read from the output stream after it is opened for the first time
6164    if (str != NULL && strcmp(str, DYNAMIC_VALUE_TAG) == 0) {
6165        mSamplingRates.add(0);
6166        return;
6167    }
6168
6169    while (str != NULL) {
6170        uint32_t rate = atoi(str);
6171        if (rate != 0) {
6172            ALOGV("loadSamplingRates() adding rate %d", rate);
6173            mSamplingRates.add(rate);
6174        }
6175        str = strtok(NULL, "|");
6176    }
6177}
6178
6179void AudioPolicyManager::AudioPort::loadFormats(char *name)
6180{
6181    char *str = strtok(name, "|");
6182
6183    // by convention, "0' in the first entry in mFormats indicates the supported formats
6184    // should be read from the output stream after it is opened for the first time
6185    if (str != NULL && strcmp(str, DYNAMIC_VALUE_TAG) == 0) {
6186        mFormats.add(AUDIO_FORMAT_DEFAULT);
6187        return;
6188    }
6189
6190    while (str != NULL) {
6191        audio_format_t format = (audio_format_t)stringToEnum(sFormatNameToEnumTable,
6192                                                             ARRAY_SIZE(sFormatNameToEnumTable),
6193                                                             str);
6194        if (format != AUDIO_FORMAT_DEFAULT) {
6195            mFormats.add(format);
6196        }
6197        str = strtok(NULL, "|");
6198    }
6199}
6200
6201void AudioPolicyManager::AudioPort::loadInChannels(char *name)
6202{
6203    const char *str = strtok(name, "|");
6204
6205    ALOGV("loadInChannels() %s", name);
6206
6207    if (str != NULL && strcmp(str, DYNAMIC_VALUE_TAG) == 0) {
6208        mChannelMasks.add(0);
6209        return;
6210    }
6211
6212    while (str != NULL) {
6213        audio_channel_mask_t channelMask =
6214                (audio_channel_mask_t)stringToEnum(sInChannelsNameToEnumTable,
6215                                                   ARRAY_SIZE(sInChannelsNameToEnumTable),
6216                                                   str);
6217        if (channelMask != 0) {
6218            ALOGV("loadInChannels() adding channelMask %04x", channelMask);
6219            mChannelMasks.add(channelMask);
6220        }
6221        str = strtok(NULL, "|");
6222    }
6223}
6224
6225void AudioPolicyManager::AudioPort::loadOutChannels(char *name)
6226{
6227    const char *str = strtok(name, "|");
6228
6229    ALOGV("loadOutChannels() %s", name);
6230
6231    // by convention, "0' in the first entry in mChannelMasks indicates the supported channel
6232    // masks should be read from the output stream after it is opened for the first time
6233    if (str != NULL && strcmp(str, DYNAMIC_VALUE_TAG) == 0) {
6234        mChannelMasks.add(0);
6235        return;
6236    }
6237
6238    while (str != NULL) {
6239        audio_channel_mask_t channelMask =
6240                (audio_channel_mask_t)stringToEnum(sOutChannelsNameToEnumTable,
6241                                                   ARRAY_SIZE(sOutChannelsNameToEnumTable),
6242                                                   str);
6243        if (channelMask != 0) {
6244            mChannelMasks.add(channelMask);
6245        }
6246        str = strtok(NULL, "|");
6247    }
6248    return;
6249}
6250
6251audio_gain_mode_t AudioPolicyManager::AudioPort::loadGainMode(char *name)
6252{
6253    const char *str = strtok(name, "|");
6254
6255    ALOGV("loadGainMode() %s", name);
6256    audio_gain_mode_t mode = 0;
6257    while (str != NULL) {
6258        mode |= (audio_gain_mode_t)stringToEnum(sGainModeNameToEnumTable,
6259                                                ARRAY_SIZE(sGainModeNameToEnumTable),
6260                                                str);
6261        str = strtok(NULL, "|");
6262    }
6263    return mode;
6264}
6265
6266void AudioPolicyManager::AudioPort::loadGain(cnode *root, int index)
6267{
6268    cnode *node = root->first_child;
6269
6270    sp<AudioGain> gain = new AudioGain(index, mUseInChannelMask);
6271
6272    while (node) {
6273        if (strcmp(node->name, GAIN_MODE) == 0) {
6274            gain->mGain.mode = loadGainMode((char *)node->value);
6275        } else if (strcmp(node->name, GAIN_CHANNELS) == 0) {
6276            if (mUseInChannelMask) {
6277                gain->mGain.channel_mask =
6278                        (audio_channel_mask_t)stringToEnum(sInChannelsNameToEnumTable,
6279                                                           ARRAY_SIZE(sInChannelsNameToEnumTable),
6280                                                           (char *)node->value);
6281            } else {
6282                gain->mGain.channel_mask =
6283                        (audio_channel_mask_t)stringToEnum(sOutChannelsNameToEnumTable,
6284                                                           ARRAY_SIZE(sOutChannelsNameToEnumTable),
6285                                                           (char *)node->value);
6286            }
6287        } else if (strcmp(node->name, GAIN_MIN_VALUE) == 0) {
6288            gain->mGain.min_value = atoi((char *)node->value);
6289        } else if (strcmp(node->name, GAIN_MAX_VALUE) == 0) {
6290            gain->mGain.max_value = atoi((char *)node->value);
6291        } else if (strcmp(node->name, GAIN_DEFAULT_VALUE) == 0) {
6292            gain->mGain.default_value = atoi((char *)node->value);
6293        } else if (strcmp(node->name, GAIN_STEP_VALUE) == 0) {
6294            gain->mGain.step_value = atoi((char *)node->value);
6295        } else if (strcmp(node->name, GAIN_MIN_RAMP_MS) == 0) {
6296            gain->mGain.min_ramp_ms = atoi((char *)node->value);
6297        } else if (strcmp(node->name, GAIN_MAX_RAMP_MS) == 0) {
6298            gain->mGain.max_ramp_ms = atoi((char *)node->value);
6299        }
6300        node = node->next;
6301    }
6302
6303    ALOGV("loadGain() adding new gain mode %08x channel mask %08x min mB %d max mB %d",
6304          gain->mGain.mode, gain->mGain.channel_mask, gain->mGain.min_value, gain->mGain.max_value);
6305
6306    if (gain->mGain.mode == 0) {
6307        return;
6308    }
6309    mGains.add(gain);
6310}
6311
6312void AudioPolicyManager::AudioPort::loadGains(cnode *root)
6313{
6314    cnode *node = root->first_child;
6315    int index = 0;
6316    while (node) {
6317        ALOGV("loadGains() loading gain %s", node->name);
6318        loadGain(node, index++);
6319        node = node->next;
6320    }
6321}
6322
6323status_t AudioPolicyManager::AudioPort::checkExactSamplingRate(uint32_t samplingRate) const
6324{
6325    for (size_t i = 0; i < mSamplingRates.size(); i ++) {
6326        if (mSamplingRates[i] == samplingRate) {
6327            return NO_ERROR;
6328        }
6329    }
6330    return BAD_VALUE;
6331}
6332
6333status_t AudioPolicyManager::AudioPort::checkCompatibleSamplingRate(uint32_t samplingRate,
6334        uint32_t *updatedSamplingRate) const
6335{
6336    // Search for the closest supported sampling rate that is above (preferred)
6337    // or below (acceptable) the desired sampling rate, within a permitted ratio.
6338    // The sampling rates do not need to be sorted in ascending order.
6339    ssize_t maxBelow = -1;
6340    ssize_t minAbove = -1;
6341    uint32_t candidate;
6342    for (size_t i = 0; i < mSamplingRates.size(); i++) {
6343        candidate = mSamplingRates[i];
6344        if (candidate == samplingRate) {
6345            if (updatedSamplingRate != NULL) {
6346                *updatedSamplingRate = candidate;
6347            }
6348            return NO_ERROR;
6349        }
6350        // candidate < desired
6351        if (candidate < samplingRate) {
6352            if (maxBelow < 0 || candidate > mSamplingRates[maxBelow]) {
6353                maxBelow = i;
6354            }
6355        // candidate > desired
6356        } else {
6357            if (minAbove < 0 || candidate < mSamplingRates[minAbove]) {
6358                minAbove = i;
6359            }
6360        }
6361    }
6362    // This uses hard-coded knowledge about AudioFlinger resampling ratios.
6363    // TODO Move these assumptions out.
6364    static const uint32_t kMaxDownSampleRatio = 6;  // beyond this aliasing occurs
6365    static const uint32_t kMaxUpSampleRatio = 256;  // beyond this sample rate inaccuracies occur
6366                                                    // due to approximation by an int32_t of the
6367                                                    // phase increments
6368    // Prefer to down-sample from a higher sampling rate, as we get the desired frequency spectrum.
6369    if (minAbove >= 0) {
6370        candidate = mSamplingRates[minAbove];
6371        if (candidate / kMaxDownSampleRatio <= samplingRate) {
6372            if (updatedSamplingRate != NULL) {
6373                *updatedSamplingRate = candidate;
6374            }
6375            return NO_ERROR;
6376        }
6377    }
6378    // But if we have to up-sample from a lower sampling rate, that's OK.
6379    if (maxBelow >= 0) {
6380        candidate = mSamplingRates[maxBelow];
6381        if (candidate * kMaxUpSampleRatio >= samplingRate) {
6382            if (updatedSamplingRate != NULL) {
6383                *updatedSamplingRate = candidate;
6384            }
6385            return NO_ERROR;
6386        }
6387    }
6388    // leave updatedSamplingRate unmodified
6389    return BAD_VALUE;
6390}
6391
6392status_t AudioPolicyManager::AudioPort::checkExactChannelMask(audio_channel_mask_t channelMask) const
6393{
6394    for (size_t i = 0; i < mChannelMasks.size(); i++) {
6395        if (mChannelMasks[i] == channelMask) {
6396            return NO_ERROR;
6397        }
6398    }
6399    return BAD_VALUE;
6400}
6401
6402status_t AudioPolicyManager::AudioPort::checkCompatibleChannelMask(audio_channel_mask_t channelMask)
6403        const
6404{
6405    const bool isRecordThread = mType == AUDIO_PORT_TYPE_MIX && mRole == AUDIO_PORT_ROLE_SINK;
6406    for (size_t i = 0; i < mChannelMasks.size(); i ++) {
6407        // FIXME Does not handle multi-channel automatic conversions yet
6408        audio_channel_mask_t supported = mChannelMasks[i];
6409        if (supported == channelMask) {
6410            return NO_ERROR;
6411        }
6412        if (isRecordThread) {
6413            // This uses hard-coded knowledge that AudioFlinger can silently down-mix and up-mix.
6414            // FIXME Abstract this out to a table.
6415            if (((supported == AUDIO_CHANNEL_IN_FRONT_BACK || supported == AUDIO_CHANNEL_IN_STEREO)
6416                    && channelMask == AUDIO_CHANNEL_IN_MONO) ||
6417                (supported == AUDIO_CHANNEL_IN_MONO && (channelMask == AUDIO_CHANNEL_IN_FRONT_BACK
6418                    || channelMask == AUDIO_CHANNEL_IN_STEREO))) {
6419                return NO_ERROR;
6420            }
6421        }
6422    }
6423    return BAD_VALUE;
6424}
6425
6426status_t AudioPolicyManager::AudioPort::checkFormat(audio_format_t format) const
6427{
6428    for (size_t i = 0; i < mFormats.size(); i ++) {
6429        if (mFormats[i] == format) {
6430            return NO_ERROR;
6431        }
6432    }
6433    return BAD_VALUE;
6434}
6435
6436
6437uint32_t AudioPolicyManager::AudioPort::pickSamplingRate() const
6438{
6439    // special case for uninitialized dynamic profile
6440    if (mSamplingRates.size() == 1 && mSamplingRates[0] == 0) {
6441        return 0;
6442    }
6443
6444    // For direct outputs, pick minimum sampling rate: this helps ensuring that the
6445    // channel count / sampling rate combination chosen will be supported by the connected
6446    // sink
6447    if ((mType == AUDIO_PORT_TYPE_MIX) && (mRole == AUDIO_PORT_ROLE_SOURCE) &&
6448            (mFlags & (AUDIO_OUTPUT_FLAG_DIRECT | AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD))) {
6449        uint32_t samplingRate = UINT_MAX;
6450        for (size_t i = 0; i < mSamplingRates.size(); i ++) {
6451            if ((mSamplingRates[i] < samplingRate) && (mSamplingRates[i] > 0)) {
6452                samplingRate = mSamplingRates[i];
6453            }
6454        }
6455        return (samplingRate == UINT_MAX) ? 0 : samplingRate;
6456    }
6457
6458    uint32_t samplingRate = 0;
6459    uint32_t maxRate = MAX_MIXER_SAMPLING_RATE;
6460
6461    // For mixed output and inputs, use max mixer sampling rates. Do not
6462    // limit sampling rate otherwise
6463    if (mType != AUDIO_PORT_TYPE_MIX) {
6464        maxRate = UINT_MAX;
6465    }
6466    for (size_t i = 0; i < mSamplingRates.size(); i ++) {
6467        if ((mSamplingRates[i] > samplingRate) && (mSamplingRates[i] <= maxRate)) {
6468            samplingRate = mSamplingRates[i];
6469        }
6470    }
6471    return samplingRate;
6472}
6473
6474audio_channel_mask_t AudioPolicyManager::AudioPort::pickChannelMask() const
6475{
6476    // special case for uninitialized dynamic profile
6477    if (mChannelMasks.size() == 1 && mChannelMasks[0] == 0) {
6478        return AUDIO_CHANNEL_NONE;
6479    }
6480    audio_channel_mask_t channelMask = AUDIO_CHANNEL_NONE;
6481
6482    // For direct outputs, pick minimum channel count: this helps ensuring that the
6483    // channel count / sampling rate combination chosen will be supported by the connected
6484    // sink
6485    if ((mType == AUDIO_PORT_TYPE_MIX) && (mRole == AUDIO_PORT_ROLE_SOURCE) &&
6486            (mFlags & (AUDIO_OUTPUT_FLAG_DIRECT | AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD))) {
6487        uint32_t channelCount = UINT_MAX;
6488        for (size_t i = 0; i < mChannelMasks.size(); i ++) {
6489            uint32_t cnlCount;
6490            if (mUseInChannelMask) {
6491                cnlCount = audio_channel_count_from_in_mask(mChannelMasks[i]);
6492            } else {
6493                cnlCount = audio_channel_count_from_out_mask(mChannelMasks[i]);
6494            }
6495            if ((cnlCount < channelCount) && (cnlCount > 0)) {
6496                channelMask = mChannelMasks[i];
6497                channelCount = cnlCount;
6498            }
6499        }
6500        return channelMask;
6501    }
6502
6503    uint32_t channelCount = 0;
6504    uint32_t maxCount = MAX_MIXER_CHANNEL_COUNT;
6505
6506    // For mixed output and inputs, use max mixer channel count. Do not
6507    // limit channel count otherwise
6508    if (mType != AUDIO_PORT_TYPE_MIX) {
6509        maxCount = UINT_MAX;
6510    }
6511    for (size_t i = 0; i < mChannelMasks.size(); i ++) {
6512        uint32_t cnlCount;
6513        if (mUseInChannelMask) {
6514            cnlCount = audio_channel_count_from_in_mask(mChannelMasks[i]);
6515        } else {
6516            cnlCount = audio_channel_count_from_out_mask(mChannelMasks[i]);
6517        }
6518        if ((cnlCount > channelCount) && (cnlCount <= maxCount)) {
6519            channelMask = mChannelMasks[i];
6520            channelCount = cnlCount;
6521        }
6522    }
6523    return channelMask;
6524}
6525
6526/* format in order of increasing preference */
6527const audio_format_t AudioPolicyManager::AudioPort::sPcmFormatCompareTable[] = {
6528        AUDIO_FORMAT_DEFAULT,
6529        AUDIO_FORMAT_PCM_16_BIT,
6530        AUDIO_FORMAT_PCM_8_24_BIT,
6531        AUDIO_FORMAT_PCM_24_BIT_PACKED,
6532        AUDIO_FORMAT_PCM_32_BIT,
6533        AUDIO_FORMAT_PCM_FLOAT,
6534};
6535
6536int AudioPolicyManager::AudioPort::compareFormats(audio_format_t format1,
6537                                                  audio_format_t format2)
6538{
6539    // NOTE: AUDIO_FORMAT_INVALID is also considered not PCM and will be compared equal to any
6540    // compressed format and better than any PCM format. This is by design of pickFormat()
6541    if (!audio_is_linear_pcm(format1)) {
6542        if (!audio_is_linear_pcm(format2)) {
6543            return 0;
6544        }
6545        return 1;
6546    }
6547    if (!audio_is_linear_pcm(format2)) {
6548        return -1;
6549    }
6550
6551    int index1 = -1, index2 = -1;
6552    for (size_t i = 0;
6553            (i < ARRAY_SIZE(sPcmFormatCompareTable)) && ((index1 == -1) || (index2 == -1));
6554            i ++) {
6555        if (sPcmFormatCompareTable[i] == format1) {
6556            index1 = i;
6557        }
6558        if (sPcmFormatCompareTable[i] == format2) {
6559            index2 = i;
6560        }
6561    }
6562    // format1 not found => index1 < 0 => format2 > format1
6563    // format2 not found => index2 < 0 => format2 < format1
6564    return index1 - index2;
6565}
6566
6567audio_format_t AudioPolicyManager::AudioPort::pickFormat() const
6568{
6569    // special case for uninitialized dynamic profile
6570    if (mFormats.size() == 1 && mFormats[0] == 0) {
6571        return AUDIO_FORMAT_DEFAULT;
6572    }
6573
6574    audio_format_t format = AUDIO_FORMAT_DEFAULT;
6575    audio_format_t bestFormat =
6576            AudioPolicyManager::AudioPort::sPcmFormatCompareTable[
6577                ARRAY_SIZE(AudioPolicyManager::AudioPort::sPcmFormatCompareTable) - 1];
6578    // For mixed output and inputs, use best mixer output format. Do not
6579    // limit format otherwise
6580    if ((mType != AUDIO_PORT_TYPE_MIX) ||
6581            ((mRole == AUDIO_PORT_ROLE_SOURCE) &&
6582             (((mFlags & (AUDIO_OUTPUT_FLAG_DIRECT | AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD)) != 0)))) {
6583        bestFormat = AUDIO_FORMAT_INVALID;
6584    }
6585
6586    for (size_t i = 0; i < mFormats.size(); i ++) {
6587        if ((compareFormats(mFormats[i], format) > 0) &&
6588                (compareFormats(mFormats[i], bestFormat) <= 0)) {
6589            format = mFormats[i];
6590        }
6591    }
6592    return format;
6593}
6594
6595status_t AudioPolicyManager::AudioPort::checkGain(const struct audio_gain_config *gainConfig,
6596                                                  int index) const
6597{
6598    if (index < 0 || (size_t)index >= mGains.size()) {
6599        return BAD_VALUE;
6600    }
6601    return mGains[index]->checkConfig(gainConfig);
6602}
6603
6604void AudioPolicyManager::AudioPort::dump(int fd, int spaces) const
6605{
6606    const size_t SIZE = 256;
6607    char buffer[SIZE];
6608    String8 result;
6609
6610    if (mName.size() != 0) {
6611        snprintf(buffer, SIZE, "%*s- name: %s\n", spaces, "", mName.string());
6612        result.append(buffer);
6613    }
6614
6615    if (mSamplingRates.size() != 0) {
6616        snprintf(buffer, SIZE, "%*s- sampling rates: ", spaces, "");
6617        result.append(buffer);
6618        for (size_t i = 0; i < mSamplingRates.size(); i++) {
6619            if (i == 0 && mSamplingRates[i] == 0) {
6620                snprintf(buffer, SIZE, "Dynamic");
6621            } else {
6622                snprintf(buffer, SIZE, "%d", mSamplingRates[i]);
6623            }
6624            result.append(buffer);
6625            result.append(i == (mSamplingRates.size() - 1) ? "" : ", ");
6626        }
6627        result.append("\n");
6628    }
6629
6630    if (mChannelMasks.size() != 0) {
6631        snprintf(buffer, SIZE, "%*s- channel masks: ", spaces, "");
6632        result.append(buffer);
6633        for (size_t i = 0; i < mChannelMasks.size(); i++) {
6634            ALOGV("AudioPort::dump mChannelMasks %zu %08x", i, mChannelMasks[i]);
6635
6636            if (i == 0 && mChannelMasks[i] == 0) {
6637                snprintf(buffer, SIZE, "Dynamic");
6638            } else {
6639                snprintf(buffer, SIZE, "0x%04x", mChannelMasks[i]);
6640            }
6641            result.append(buffer);
6642            result.append(i == (mChannelMasks.size() - 1) ? "" : ", ");
6643        }
6644        result.append("\n");
6645    }
6646
6647    if (mFormats.size() != 0) {
6648        snprintf(buffer, SIZE, "%*s- formats: ", spaces, "");
6649        result.append(buffer);
6650        for (size_t i = 0; i < mFormats.size(); i++) {
6651            const char *formatStr = enumToString(sFormatNameToEnumTable,
6652                                                 ARRAY_SIZE(sFormatNameToEnumTable),
6653                                                 mFormats[i]);
6654            if (i == 0 && strcmp(formatStr, "") == 0) {
6655                snprintf(buffer, SIZE, "Dynamic");
6656            } else {
6657                snprintf(buffer, SIZE, "%s", formatStr);
6658            }
6659            result.append(buffer);
6660            result.append(i == (mFormats.size() - 1) ? "" : ", ");
6661        }
6662        result.append("\n");
6663    }
6664    write(fd, result.string(), result.size());
6665    if (mGains.size() != 0) {
6666        snprintf(buffer, SIZE, "%*s- gains:\n", spaces, "");
6667        write(fd, buffer, strlen(buffer) + 1);
6668        result.append(buffer);
6669        for (size_t i = 0; i < mGains.size(); i++) {
6670            mGains[i]->dump(fd, spaces + 2, i);
6671        }
6672    }
6673}
6674
6675// --- AudioGain class implementation
6676
6677AudioPolicyManager::AudioGain::AudioGain(int index, bool useInChannelMask)
6678{
6679    mIndex = index;
6680    mUseInChannelMask = useInChannelMask;
6681    memset(&mGain, 0, sizeof(struct audio_gain));
6682}
6683
6684void AudioPolicyManager::AudioGain::getDefaultConfig(struct audio_gain_config *config)
6685{
6686    config->index = mIndex;
6687    config->mode = mGain.mode;
6688    config->channel_mask = mGain.channel_mask;
6689    if ((mGain.mode & AUDIO_GAIN_MODE_JOINT) == AUDIO_GAIN_MODE_JOINT) {
6690        config->values[0] = mGain.default_value;
6691    } else {
6692        uint32_t numValues;
6693        if (mUseInChannelMask) {
6694            numValues = audio_channel_count_from_in_mask(mGain.channel_mask);
6695        } else {
6696            numValues = audio_channel_count_from_out_mask(mGain.channel_mask);
6697        }
6698        for (size_t i = 0; i < numValues; i++) {
6699            config->values[i] = mGain.default_value;
6700        }
6701    }
6702    if ((mGain.mode & AUDIO_GAIN_MODE_RAMP) == AUDIO_GAIN_MODE_RAMP) {
6703        config->ramp_duration_ms = mGain.min_ramp_ms;
6704    }
6705}
6706
6707status_t AudioPolicyManager::AudioGain::checkConfig(const struct audio_gain_config *config)
6708{
6709    if ((config->mode & ~mGain.mode) != 0) {
6710        return BAD_VALUE;
6711    }
6712    if ((config->mode & AUDIO_GAIN_MODE_JOINT) == AUDIO_GAIN_MODE_JOINT) {
6713        if ((config->values[0] < mGain.min_value) ||
6714                    (config->values[0] > mGain.max_value)) {
6715            return BAD_VALUE;
6716        }
6717    } else {
6718        if ((config->channel_mask & ~mGain.channel_mask) != 0) {
6719            return BAD_VALUE;
6720        }
6721        uint32_t numValues;
6722        if (mUseInChannelMask) {
6723            numValues = audio_channel_count_from_in_mask(config->channel_mask);
6724        } else {
6725            numValues = audio_channel_count_from_out_mask(config->channel_mask);
6726        }
6727        for (size_t i = 0; i < numValues; i++) {
6728            if ((config->values[i] < mGain.min_value) ||
6729                    (config->values[i] > mGain.max_value)) {
6730                return BAD_VALUE;
6731            }
6732        }
6733    }
6734    if ((config->mode & AUDIO_GAIN_MODE_RAMP) == AUDIO_GAIN_MODE_RAMP) {
6735        if ((config->ramp_duration_ms < mGain.min_ramp_ms) ||
6736                    (config->ramp_duration_ms > mGain.max_ramp_ms)) {
6737            return BAD_VALUE;
6738        }
6739    }
6740    return NO_ERROR;
6741}
6742
6743void AudioPolicyManager::AudioGain::dump(int fd, int spaces, int index) const
6744{
6745    const size_t SIZE = 256;
6746    char buffer[SIZE];
6747    String8 result;
6748
6749    snprintf(buffer, SIZE, "%*sGain %d:\n", spaces, "", index+1);
6750    result.append(buffer);
6751    snprintf(buffer, SIZE, "%*s- mode: %08x\n", spaces, "", mGain.mode);
6752    result.append(buffer);
6753    snprintf(buffer, SIZE, "%*s- channel_mask: %08x\n", spaces, "", mGain.channel_mask);
6754    result.append(buffer);
6755    snprintf(buffer, SIZE, "%*s- min_value: %d mB\n", spaces, "", mGain.min_value);
6756    result.append(buffer);
6757    snprintf(buffer, SIZE, "%*s- max_value: %d mB\n", spaces, "", mGain.max_value);
6758    result.append(buffer);
6759    snprintf(buffer, SIZE, "%*s- default_value: %d mB\n", spaces, "", mGain.default_value);
6760    result.append(buffer);
6761    snprintf(buffer, SIZE, "%*s- step_value: %d mB\n", spaces, "", mGain.step_value);
6762    result.append(buffer);
6763    snprintf(buffer, SIZE, "%*s- min_ramp_ms: %d ms\n", spaces, "", mGain.min_ramp_ms);
6764    result.append(buffer);
6765    snprintf(buffer, SIZE, "%*s- max_ramp_ms: %d ms\n", spaces, "", mGain.max_ramp_ms);
6766    result.append(buffer);
6767
6768    write(fd, result.string(), result.size());
6769}
6770
6771// --- AudioPortConfig class implementation
6772
6773AudioPolicyManager::AudioPortConfig::AudioPortConfig()
6774{
6775    mSamplingRate = 0;
6776    mChannelMask = AUDIO_CHANNEL_NONE;
6777    mFormat = AUDIO_FORMAT_INVALID;
6778    mGain.index = -1;
6779}
6780
6781status_t AudioPolicyManager::AudioPortConfig::applyAudioPortConfig(
6782                                                        const struct audio_port_config *config,
6783                                                        struct audio_port_config *backupConfig)
6784{
6785    struct audio_port_config localBackupConfig;
6786    status_t status = NO_ERROR;
6787
6788    localBackupConfig.config_mask = config->config_mask;
6789    toAudioPortConfig(&localBackupConfig);
6790
6791    sp<AudioPort> audioport = getAudioPort();
6792    if (audioport == 0) {
6793        status = NO_INIT;
6794        goto exit;
6795    }
6796    if (config->config_mask & AUDIO_PORT_CONFIG_SAMPLE_RATE) {
6797        status = audioport->checkExactSamplingRate(config->sample_rate);
6798        if (status != NO_ERROR) {
6799            goto exit;
6800        }
6801        mSamplingRate = config->sample_rate;
6802    }
6803    if (config->config_mask & AUDIO_PORT_CONFIG_CHANNEL_MASK) {
6804        status = audioport->checkExactChannelMask(config->channel_mask);
6805        if (status != NO_ERROR) {
6806            goto exit;
6807        }
6808        mChannelMask = config->channel_mask;
6809    }
6810    if (config->config_mask & AUDIO_PORT_CONFIG_FORMAT) {
6811        status = audioport->checkFormat(config->format);
6812        if (status != NO_ERROR) {
6813            goto exit;
6814        }
6815        mFormat = config->format;
6816    }
6817    if (config->config_mask & AUDIO_PORT_CONFIG_GAIN) {
6818        status = audioport->checkGain(&config->gain, config->gain.index);
6819        if (status != NO_ERROR) {
6820            goto exit;
6821        }
6822        mGain = config->gain;
6823    }
6824
6825exit:
6826    if (status != NO_ERROR) {
6827        applyAudioPortConfig(&localBackupConfig);
6828    }
6829    if (backupConfig != NULL) {
6830        *backupConfig = localBackupConfig;
6831    }
6832    return status;
6833}
6834
6835void AudioPolicyManager::AudioPortConfig::toAudioPortConfig(
6836                                                    struct audio_port_config *dstConfig,
6837                                                    const struct audio_port_config *srcConfig) const
6838{
6839    if (dstConfig->config_mask & AUDIO_PORT_CONFIG_SAMPLE_RATE) {
6840        dstConfig->sample_rate = mSamplingRate;
6841        if ((srcConfig != NULL) && (srcConfig->config_mask & AUDIO_PORT_CONFIG_SAMPLE_RATE)) {
6842            dstConfig->sample_rate = srcConfig->sample_rate;
6843        }
6844    } else {
6845        dstConfig->sample_rate = 0;
6846    }
6847    if (dstConfig->config_mask & AUDIO_PORT_CONFIG_CHANNEL_MASK) {
6848        dstConfig->channel_mask = mChannelMask;
6849        if ((srcConfig != NULL) && (srcConfig->config_mask & AUDIO_PORT_CONFIG_CHANNEL_MASK)) {
6850            dstConfig->channel_mask = srcConfig->channel_mask;
6851        }
6852    } else {
6853        dstConfig->channel_mask = AUDIO_CHANNEL_NONE;
6854    }
6855    if (dstConfig->config_mask & AUDIO_PORT_CONFIG_FORMAT) {
6856        dstConfig->format = mFormat;
6857        if ((srcConfig != NULL) && (srcConfig->config_mask & AUDIO_PORT_CONFIG_FORMAT)) {
6858            dstConfig->format = srcConfig->format;
6859        }
6860    } else {
6861        dstConfig->format = AUDIO_FORMAT_INVALID;
6862    }
6863    if (dstConfig->config_mask & AUDIO_PORT_CONFIG_GAIN) {
6864        dstConfig->gain = mGain;
6865        if ((srcConfig != NULL) && (srcConfig->config_mask & AUDIO_PORT_CONFIG_GAIN)) {
6866            dstConfig->gain = srcConfig->gain;
6867        }
6868    } else {
6869        dstConfig->gain.index = -1;
6870    }
6871    if (dstConfig->gain.index != -1) {
6872        dstConfig->config_mask |= AUDIO_PORT_CONFIG_GAIN;
6873    } else {
6874        dstConfig->config_mask &= ~AUDIO_PORT_CONFIG_GAIN;
6875    }
6876}
6877
6878// --- IOProfile class implementation
6879
6880AudioPolicyManager::IOProfile::IOProfile(const String8& name, audio_port_role_t role,
6881                                         const sp<HwModule>& module)
6882    : AudioPort(name, AUDIO_PORT_TYPE_MIX, role, module)
6883{
6884}
6885
6886AudioPolicyManager::IOProfile::~IOProfile()
6887{
6888}
6889
6890// checks if the IO profile is compatible with specified parameters.
6891// Sampling rate, format and channel mask must be specified in order to
6892// get a valid a match
6893bool AudioPolicyManager::IOProfile::isCompatibleProfile(audio_devices_t device,
6894                                                            uint32_t samplingRate,
6895                                                            uint32_t *updatedSamplingRate,
6896                                                            audio_format_t format,
6897                                                            audio_channel_mask_t channelMask,
6898                                                            uint32_t flags) const
6899{
6900    const bool isPlaybackThread = mType == AUDIO_PORT_TYPE_MIX && mRole == AUDIO_PORT_ROLE_SOURCE;
6901    const bool isRecordThread = mType == AUDIO_PORT_TYPE_MIX && mRole == AUDIO_PORT_ROLE_SINK;
6902    ALOG_ASSERT(isPlaybackThread != isRecordThread);
6903
6904    if ((mSupportedDevices.types() & device) != device) {
6905        return false;
6906    }
6907
6908    if (samplingRate == 0) {
6909         return false;
6910    }
6911    uint32_t myUpdatedSamplingRate = samplingRate;
6912    if (isPlaybackThread && checkExactSamplingRate(samplingRate) != NO_ERROR) {
6913         return false;
6914    }
6915    if (isRecordThread && checkCompatibleSamplingRate(samplingRate, &myUpdatedSamplingRate) !=
6916            NO_ERROR) {
6917         return false;
6918    }
6919
6920    if (!audio_is_valid_format(format) || checkFormat(format) != NO_ERROR) {
6921        return false;
6922    }
6923
6924    if (isPlaybackThread && (!audio_is_output_channel(channelMask) ||
6925            checkExactChannelMask(channelMask) != NO_ERROR)) {
6926        return false;
6927    }
6928    if (isRecordThread && (!audio_is_input_channel(channelMask) ||
6929            checkCompatibleChannelMask(channelMask) != NO_ERROR)) {
6930        return false;
6931    }
6932
6933    if (isPlaybackThread && (mFlags & flags) != flags) {
6934        return false;
6935    }
6936    // The only input flag that is allowed to be different is the fast flag.
6937    // An existing fast stream is compatible with a normal track request.
6938    // An existing normal stream is compatible with a fast track request,
6939    // but the fast request will be denied by AudioFlinger and converted to normal track.
6940    if (isRecordThread && ((mFlags ^ flags) &
6941            ~AUDIO_INPUT_FLAG_FAST)) {
6942        return false;
6943    }
6944
6945    if (updatedSamplingRate != NULL) {
6946        *updatedSamplingRate = myUpdatedSamplingRate;
6947    }
6948    return true;
6949}
6950
6951void AudioPolicyManager::IOProfile::dump(int fd)
6952{
6953    const size_t SIZE = 256;
6954    char buffer[SIZE];
6955    String8 result;
6956
6957    AudioPort::dump(fd, 4);
6958
6959    snprintf(buffer, SIZE, "    - flags: 0x%04x\n", mFlags);
6960    result.append(buffer);
6961    snprintf(buffer, SIZE, "    - devices:\n");
6962    result.append(buffer);
6963    write(fd, result.string(), result.size());
6964    for (size_t i = 0; i < mSupportedDevices.size(); i++) {
6965        mSupportedDevices[i]->dump(fd, 6, i);
6966    }
6967}
6968
6969void AudioPolicyManager::IOProfile::log()
6970{
6971    const size_t SIZE = 256;
6972    char buffer[SIZE];
6973    String8 result;
6974
6975    ALOGV("    - sampling rates: ");
6976    for (size_t i = 0; i < mSamplingRates.size(); i++) {
6977        ALOGV("  %d", mSamplingRates[i]);
6978    }
6979
6980    ALOGV("    - channel masks: ");
6981    for (size_t i = 0; i < mChannelMasks.size(); i++) {
6982        ALOGV("  0x%04x", mChannelMasks[i]);
6983    }
6984
6985    ALOGV("    - formats: ");
6986    for (size_t i = 0; i < mFormats.size(); i++) {
6987        ALOGV("  0x%08x", mFormats[i]);
6988    }
6989
6990    ALOGV("    - devices: 0x%04x\n", mSupportedDevices.types());
6991    ALOGV("    - flags: 0x%04x\n", mFlags);
6992}
6993
6994
6995// --- DeviceDescriptor implementation
6996
6997
6998AudioPolicyManager::DeviceDescriptor::DeviceDescriptor(const String8& name, audio_devices_t type) :
6999                     AudioPort(name, AUDIO_PORT_TYPE_DEVICE,
7000                               audio_is_output_device(type) ? AUDIO_PORT_ROLE_SINK :
7001                                                              AUDIO_PORT_ROLE_SOURCE,
7002                             NULL),
7003                     mDeviceType(type), mAddress(""), mId(0)
7004{
7005    if (mGains.size() > 0) {
7006        mGains[0]->getDefaultConfig(&mGain);
7007    }
7008}
7009
7010bool AudioPolicyManager::DeviceDescriptor::equals(const sp<DeviceDescriptor>& other) const
7011{
7012    // Devices are considered equal if they:
7013    // - are of the same type (a device type cannot be AUDIO_DEVICE_NONE)
7014    // - have the same address or one device does not specify the address
7015    // - have the same channel mask or one device does not specify the channel mask
7016    return (mDeviceType == other->mDeviceType) &&
7017           (mAddress == "" || other->mAddress == "" || mAddress == other->mAddress) &&
7018           (mChannelMask == 0 || other->mChannelMask == 0 ||
7019                mChannelMask == other->mChannelMask);
7020}
7021
7022void AudioPolicyManager::DeviceVector::refreshTypes()
7023{
7024    mDeviceTypes = AUDIO_DEVICE_NONE;
7025    for(size_t i = 0; i < size(); i++) {
7026        mDeviceTypes |= itemAt(i)->mDeviceType;
7027    }
7028    ALOGV("DeviceVector::refreshTypes() mDeviceTypes %08x", mDeviceTypes);
7029}
7030
7031ssize_t AudioPolicyManager::DeviceVector::indexOf(const sp<DeviceDescriptor>& item) const
7032{
7033    for(size_t i = 0; i < size(); i++) {
7034        if (item->equals(itemAt(i))) {
7035            return i;
7036        }
7037    }
7038    return -1;
7039}
7040
7041ssize_t AudioPolicyManager::DeviceVector::add(const sp<DeviceDescriptor>& item)
7042{
7043    ssize_t ret = indexOf(item);
7044
7045    if (ret < 0) {
7046        ret = SortedVector::add(item);
7047        if (ret >= 0) {
7048            refreshTypes();
7049        }
7050    } else {
7051        ALOGW("DeviceVector::add device %08x already in", item->mDeviceType);
7052        ret = -1;
7053    }
7054    return ret;
7055}
7056
7057ssize_t AudioPolicyManager::DeviceVector::remove(const sp<DeviceDescriptor>& item)
7058{
7059    size_t i;
7060    ssize_t ret = indexOf(item);
7061
7062    if (ret < 0) {
7063        ALOGW("DeviceVector::remove device %08x not in", item->mDeviceType);
7064    } else {
7065        ret = SortedVector::removeAt(ret);
7066        if (ret >= 0) {
7067            refreshTypes();
7068        }
7069    }
7070    return ret;
7071}
7072
7073void AudioPolicyManager::DeviceVector::loadDevicesFromType(audio_devices_t types)
7074{
7075    DeviceVector deviceList;
7076
7077    uint32_t role_bit = AUDIO_DEVICE_BIT_IN & types;
7078    types &= ~role_bit;
7079
7080    while (types) {
7081        uint32_t i = 31 - __builtin_clz(types);
7082        uint32_t type = 1 << i;
7083        types &= ~type;
7084        add(new DeviceDescriptor(String8(""), type | role_bit));
7085    }
7086}
7087
7088void AudioPolicyManager::DeviceVector::loadDevicesFromName(char *name,
7089                                                           const DeviceVector& declaredDevices)
7090{
7091    char *devName = strtok(name, "|");
7092    while (devName != NULL) {
7093        if (strlen(devName) != 0) {
7094            audio_devices_t type = stringToEnum(sDeviceNameToEnumTable,
7095                                 ARRAY_SIZE(sDeviceNameToEnumTable),
7096                                 devName);
7097            if (type != AUDIO_DEVICE_NONE) {
7098                sp<DeviceDescriptor> dev = new DeviceDescriptor(String8(""), type);
7099                if (type == AUDIO_DEVICE_IN_REMOTE_SUBMIX) {
7100                    dev->mAddress = String8("0");
7101                }
7102                add(dev);
7103            } else {
7104                sp<DeviceDescriptor> deviceDesc =
7105                        declaredDevices.getDeviceFromName(String8(devName));
7106                if (deviceDesc != 0) {
7107                    add(deviceDesc);
7108                }
7109            }
7110         }
7111        devName = strtok(NULL, "|");
7112     }
7113}
7114
7115sp<AudioPolicyManager::DeviceDescriptor> AudioPolicyManager::DeviceVector::getDevice(
7116                                                        audio_devices_t type, String8 address) const
7117{
7118    sp<DeviceDescriptor> device;
7119    for (size_t i = 0; i < size(); i++) {
7120        if (itemAt(i)->mDeviceType == type) {
7121            device = itemAt(i);
7122            if (itemAt(i)->mAddress = address) {
7123                break;
7124            }
7125        }
7126    }
7127    ALOGV("DeviceVector::getDevice() for type %d address %s found %p",
7128          type, address.string(), device.get());
7129    return device;
7130}
7131
7132sp<AudioPolicyManager::DeviceDescriptor> AudioPolicyManager::DeviceVector::getDeviceFromId(
7133                                                                    audio_port_handle_t id) const
7134{
7135    sp<DeviceDescriptor> device;
7136    for (size_t i = 0; i < size(); i++) {
7137        ALOGV("DeviceVector::getDeviceFromId(%d) itemAt(%zu)->mId %d", id, i, itemAt(i)->mId);
7138        if (itemAt(i)->mId == id) {
7139            device = itemAt(i);
7140            break;
7141        }
7142    }
7143    return device;
7144}
7145
7146AudioPolicyManager::DeviceVector AudioPolicyManager::DeviceVector::getDevicesFromType(
7147                                                                        audio_devices_t type) const
7148{
7149    DeviceVector devices;
7150    for (size_t i = 0; (i < size()) && (type != AUDIO_DEVICE_NONE); i++) {
7151        if (itemAt(i)->mDeviceType & type & ~AUDIO_DEVICE_BIT_IN) {
7152            devices.add(itemAt(i));
7153            type &= ~itemAt(i)->mDeviceType;
7154            ALOGV("DeviceVector::getDevicesFromType() for type %x found %p",
7155                  itemAt(i)->mDeviceType, itemAt(i).get());
7156        }
7157    }
7158    return devices;
7159}
7160
7161AudioPolicyManager::DeviceVector AudioPolicyManager::DeviceVector::getDevicesFromTypeAddr(
7162        audio_devices_t type, String8 address) const
7163{
7164    DeviceVector devices;
7165    //ALOGV("   looking for device=%x, addr=%s", type, address.string());
7166    for (size_t i = 0; i < size(); i++) {
7167        //ALOGV("     at i=%d: device=%x, addr=%s",
7168        //        i, itemAt(i)->mDeviceType, itemAt(i)->mAddress.string());
7169        if (itemAt(i)->mDeviceType == type) {
7170            if (itemAt(i)->mAddress == address) {
7171                //ALOGV("      found matching address %s", address.string());
7172                devices.add(itemAt(i));
7173            }
7174        }
7175    }
7176    return devices;
7177}
7178
7179sp<AudioPolicyManager::DeviceDescriptor> AudioPolicyManager::DeviceVector::getDeviceFromName(
7180        const String8& name) const
7181{
7182    sp<DeviceDescriptor> device;
7183    for (size_t i = 0; i < size(); i++) {
7184        if (itemAt(i)->mName == name) {
7185            device = itemAt(i);
7186            break;
7187        }
7188    }
7189    return device;
7190}
7191
7192void AudioPolicyManager::DeviceDescriptor::toAudioPortConfig(
7193                                                    struct audio_port_config *dstConfig,
7194                                                    const struct audio_port_config *srcConfig) const
7195{
7196    dstConfig->config_mask = AUDIO_PORT_CONFIG_CHANNEL_MASK|AUDIO_PORT_CONFIG_GAIN;
7197    if (srcConfig != NULL) {
7198        dstConfig->config_mask |= srcConfig->config_mask;
7199    }
7200
7201    AudioPortConfig::toAudioPortConfig(dstConfig, srcConfig);
7202
7203    dstConfig->id = mId;
7204    dstConfig->role = audio_is_output_device(mDeviceType) ?
7205                        AUDIO_PORT_ROLE_SINK : AUDIO_PORT_ROLE_SOURCE;
7206    dstConfig->type = AUDIO_PORT_TYPE_DEVICE;
7207    dstConfig->ext.device.type = mDeviceType;
7208    dstConfig->ext.device.hw_module = mModule->mHandle;
7209    strncpy(dstConfig->ext.device.address, mAddress.string(), AUDIO_DEVICE_MAX_ADDRESS_LEN);
7210}
7211
7212void AudioPolicyManager::DeviceDescriptor::toAudioPort(struct audio_port *port) const
7213{
7214    ALOGV("DeviceDescriptor::toAudioPort() handle %d type %x", mId, mDeviceType);
7215    AudioPort::toAudioPort(port);
7216    port->id = mId;
7217    toAudioPortConfig(&port->active_config);
7218    port->ext.device.type = mDeviceType;
7219    port->ext.device.hw_module = mModule->mHandle;
7220    strncpy(port->ext.device.address, mAddress.string(), AUDIO_DEVICE_MAX_ADDRESS_LEN);
7221}
7222
7223status_t AudioPolicyManager::DeviceDescriptor::dump(int fd, int spaces, int index) const
7224{
7225    const size_t SIZE = 256;
7226    char buffer[SIZE];
7227    String8 result;
7228
7229    snprintf(buffer, SIZE, "%*sDevice %d:\n", spaces, "", index+1);
7230    result.append(buffer);
7231    if (mId != 0) {
7232        snprintf(buffer, SIZE, "%*s- id: %2d\n", spaces, "", mId);
7233        result.append(buffer);
7234    }
7235    snprintf(buffer, SIZE, "%*s- type: %-48s\n", spaces, "",
7236                                              enumToString(sDeviceNameToEnumTable,
7237                                                           ARRAY_SIZE(sDeviceNameToEnumTable),
7238                                                           mDeviceType));
7239    result.append(buffer);
7240    if (mAddress.size() != 0) {
7241        snprintf(buffer, SIZE, "%*s- address: %-32s\n", spaces, "", mAddress.string());
7242        result.append(buffer);
7243    }
7244    write(fd, result.string(), result.size());
7245    AudioPort::dump(fd, spaces);
7246
7247    return NO_ERROR;
7248}
7249
7250status_t AudioPolicyManager::AudioPatch::dump(int fd, int spaces, int index) const
7251{
7252    const size_t SIZE = 256;
7253    char buffer[SIZE];
7254    String8 result;
7255
7256
7257    snprintf(buffer, SIZE, "%*sAudio patch %d:\n", spaces, "", index+1);
7258    result.append(buffer);
7259    snprintf(buffer, SIZE, "%*s- handle: %2d\n", spaces, "", mHandle);
7260    result.append(buffer);
7261    snprintf(buffer, SIZE, "%*s- audio flinger handle: %2d\n", spaces, "", mAfPatchHandle);
7262    result.append(buffer);
7263    snprintf(buffer, SIZE, "%*s- owner uid: %2d\n", spaces, "", mUid);
7264    result.append(buffer);
7265    snprintf(buffer, SIZE, "%*s- %d sources:\n", spaces, "", mPatch.num_sources);
7266    result.append(buffer);
7267    for (size_t i = 0; i < mPatch.num_sources; i++) {
7268        if (mPatch.sources[i].type == AUDIO_PORT_TYPE_DEVICE) {
7269            snprintf(buffer, SIZE, "%*s- Device ID %d %s\n", spaces + 2, "",
7270                     mPatch.sources[i].id, enumToString(sDeviceNameToEnumTable,
7271                                                        ARRAY_SIZE(sDeviceNameToEnumTable),
7272                                                        mPatch.sources[i].ext.device.type));
7273        } else {
7274            snprintf(buffer, SIZE, "%*s- Mix ID %d I/O handle %d\n", spaces + 2, "",
7275                     mPatch.sources[i].id, mPatch.sources[i].ext.mix.handle);
7276        }
7277        result.append(buffer);
7278    }
7279    snprintf(buffer, SIZE, "%*s- %d sinks:\n", spaces, "", mPatch.num_sinks);
7280    result.append(buffer);
7281    for (size_t i = 0; i < mPatch.num_sinks; i++) {
7282        if (mPatch.sinks[i].type == AUDIO_PORT_TYPE_DEVICE) {
7283            snprintf(buffer, SIZE, "%*s- Device ID %d %s\n", spaces + 2, "",
7284                     mPatch.sinks[i].id, enumToString(sDeviceNameToEnumTable,
7285                                                        ARRAY_SIZE(sDeviceNameToEnumTable),
7286                                                        mPatch.sinks[i].ext.device.type));
7287        } else {
7288            snprintf(buffer, SIZE, "%*s- Mix ID %d I/O handle %d\n", spaces + 2, "",
7289                     mPatch.sinks[i].id, mPatch.sinks[i].ext.mix.handle);
7290        }
7291        result.append(buffer);
7292    }
7293
7294    write(fd, result.string(), result.size());
7295    return NO_ERROR;
7296}
7297
7298// --- audio_policy.conf file parsing
7299
7300uint32_t AudioPolicyManager::parseOutputFlagNames(char *name)
7301{
7302    uint32_t flag = 0;
7303
7304    // it is OK to cast name to non const here as we are not going to use it after
7305    // strtok() modifies it
7306    char *flagName = strtok(name, "|");
7307    while (flagName != NULL) {
7308        if (strlen(flagName) != 0) {
7309            flag |= stringToEnum(sOutputFlagNameToEnumTable,
7310                               ARRAY_SIZE(sOutputFlagNameToEnumTable),
7311                               flagName);
7312        }
7313        flagName = strtok(NULL, "|");
7314    }
7315    //force direct flag if offload flag is set: offloading implies a direct output stream
7316    // and all common behaviors are driven by checking only the direct flag
7317    // this should normally be set appropriately in the policy configuration file
7318    if ((flag & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) != 0) {
7319        flag |= AUDIO_OUTPUT_FLAG_DIRECT;
7320    }
7321
7322    return flag;
7323}
7324
7325uint32_t AudioPolicyManager::parseInputFlagNames(char *name)
7326{
7327    uint32_t flag = 0;
7328
7329    // it is OK to cast name to non const here as we are not going to use it after
7330    // strtok() modifies it
7331    char *flagName = strtok(name, "|");
7332    while (flagName != NULL) {
7333        if (strlen(flagName) != 0) {
7334            flag |= stringToEnum(sInputFlagNameToEnumTable,
7335                               ARRAY_SIZE(sInputFlagNameToEnumTable),
7336                               flagName);
7337        }
7338        flagName = strtok(NULL, "|");
7339    }
7340    return flag;
7341}
7342
7343audio_devices_t AudioPolicyManager::parseDeviceNames(char *name)
7344{
7345    uint32_t device = 0;
7346
7347    char *devName = strtok(name, "|");
7348    while (devName != NULL) {
7349        if (strlen(devName) != 0) {
7350            device |= stringToEnum(sDeviceNameToEnumTable,
7351                                 ARRAY_SIZE(sDeviceNameToEnumTable),
7352                                 devName);
7353         }
7354        devName = strtok(NULL, "|");
7355     }
7356    return device;
7357}
7358
7359void AudioPolicyManager::loadHwModule(cnode *root)
7360{
7361    status_t status = NAME_NOT_FOUND;
7362    cnode *node;
7363    sp<HwModule> module = new HwModule(root->name);
7364
7365    node = config_find(root, DEVICES_TAG);
7366    if (node != NULL) {
7367        node = node->first_child;
7368        while (node) {
7369            ALOGV("loadHwModule() loading device %s", node->name);
7370            status_t tmpStatus = module->loadDevice(node);
7371            if (status == NAME_NOT_FOUND || status == NO_ERROR) {
7372                status = tmpStatus;
7373            }
7374            node = node->next;
7375        }
7376    }
7377    node = config_find(root, OUTPUTS_TAG);
7378    if (node != NULL) {
7379        node = node->first_child;
7380        while (node) {
7381            ALOGV("loadHwModule() loading output %s", node->name);
7382            status_t tmpStatus = module->loadOutput(node);
7383            if (status == NAME_NOT_FOUND || status == NO_ERROR) {
7384                status = tmpStatus;
7385            }
7386            node = node->next;
7387        }
7388    }
7389    node = config_find(root, INPUTS_TAG);
7390    if (node != NULL) {
7391        node = node->first_child;
7392        while (node) {
7393            ALOGV("loadHwModule() loading input %s", node->name);
7394            status_t tmpStatus = module->loadInput(node);
7395            if (status == NAME_NOT_FOUND || status == NO_ERROR) {
7396                status = tmpStatus;
7397            }
7398            node = node->next;
7399        }
7400    }
7401    loadGlobalConfig(root, module);
7402
7403    if (status == NO_ERROR) {
7404        mHwModules.add(module);
7405    }
7406}
7407
7408void AudioPolicyManager::loadHwModules(cnode *root)
7409{
7410    cnode *node = config_find(root, AUDIO_HW_MODULE_TAG);
7411    if (node == NULL) {
7412        return;
7413    }
7414
7415    node = node->first_child;
7416    while (node) {
7417        ALOGV("loadHwModules() loading module %s", node->name);
7418        loadHwModule(node);
7419        node = node->next;
7420    }
7421}
7422
7423void AudioPolicyManager::loadGlobalConfig(cnode *root, const sp<HwModule>& module)
7424{
7425    cnode *node = config_find(root, GLOBAL_CONFIG_TAG);
7426
7427    if (node == NULL) {
7428        return;
7429    }
7430    DeviceVector declaredDevices;
7431    if (module != NULL) {
7432        declaredDevices = module->mDeclaredDevices;
7433    }
7434
7435    node = node->first_child;
7436    while (node) {
7437        if (strcmp(ATTACHED_OUTPUT_DEVICES_TAG, node->name) == 0) {
7438            mAvailableOutputDevices.loadDevicesFromName((char *)node->value,
7439                                                        declaredDevices);
7440            ALOGV("loadGlobalConfig() Attached Output Devices %08x",
7441                  mAvailableOutputDevices.types());
7442        } else if (strcmp(DEFAULT_OUTPUT_DEVICE_TAG, node->name) == 0) {
7443            audio_devices_t device = (audio_devices_t)stringToEnum(sDeviceNameToEnumTable,
7444                                              ARRAY_SIZE(sDeviceNameToEnumTable),
7445                                              (char *)node->value);
7446            if (device != AUDIO_DEVICE_NONE) {
7447                mDefaultOutputDevice = new DeviceDescriptor(String8(""), device);
7448            } else {
7449                ALOGW("loadGlobalConfig() default device not specified");
7450            }
7451            ALOGV("loadGlobalConfig() mDefaultOutputDevice %08x", mDefaultOutputDevice->mDeviceType);
7452        } else if (strcmp(ATTACHED_INPUT_DEVICES_TAG, node->name) == 0) {
7453            mAvailableInputDevices.loadDevicesFromName((char *)node->value,
7454                                                       declaredDevices);
7455            ALOGV("loadGlobalConfig() Available InputDevices %08x", mAvailableInputDevices.types());
7456        } else if (strcmp(SPEAKER_DRC_ENABLED_TAG, node->name) == 0) {
7457            mSpeakerDrcEnabled = stringToBool((char *)node->value);
7458            ALOGV("loadGlobalConfig() mSpeakerDrcEnabled = %d", mSpeakerDrcEnabled);
7459        } else if (strcmp(AUDIO_HAL_VERSION_TAG, node->name) == 0) {
7460            uint32_t major, minor;
7461            sscanf((char *)node->value, "%u.%u", &major, &minor);
7462            module->mHalVersion = HARDWARE_DEVICE_API_VERSION(major, minor);
7463            ALOGV("loadGlobalConfig() mHalVersion = %04x major %u minor %u",
7464                  module->mHalVersion, major, minor);
7465        }
7466        node = node->next;
7467    }
7468}
7469
7470status_t AudioPolicyManager::loadAudioPolicyConfig(const char *path)
7471{
7472    cnode *root;
7473    char *data;
7474
7475    data = (char *)load_file(path, NULL);
7476    if (data == NULL) {
7477        return -ENODEV;
7478    }
7479    root = config_node("", "");
7480    config_load(root, data);
7481
7482    loadHwModules(root);
7483    // legacy audio_policy.conf files have one global_configuration section
7484    loadGlobalConfig(root, getModuleFromName(AUDIO_HARDWARE_MODULE_ID_PRIMARY));
7485    config_free(root);
7486    free(root);
7487    free(data);
7488
7489    ALOGI("loadAudioPolicyConfig() loaded %s\n", path);
7490
7491    return NO_ERROR;
7492}
7493
7494void AudioPolicyManager::defaultAudioPolicyConfig(void)
7495{
7496    sp<HwModule> module;
7497    sp<IOProfile> profile;
7498    sp<DeviceDescriptor> defaultInputDevice = new DeviceDescriptor(String8(""),
7499                                                                   AUDIO_DEVICE_IN_BUILTIN_MIC);
7500    mAvailableOutputDevices.add(mDefaultOutputDevice);
7501    mAvailableInputDevices.add(defaultInputDevice);
7502
7503    module = new HwModule("primary");
7504
7505    profile = new IOProfile(String8("primary"), AUDIO_PORT_ROLE_SOURCE, module);
7506    profile->mSamplingRates.add(44100);
7507    profile->mFormats.add(AUDIO_FORMAT_PCM_16_BIT);
7508    profile->mChannelMasks.add(AUDIO_CHANNEL_OUT_STEREO);
7509    profile->mSupportedDevices.add(mDefaultOutputDevice);
7510    profile->mFlags = AUDIO_OUTPUT_FLAG_PRIMARY;
7511    module->mOutputProfiles.add(profile);
7512
7513    profile = new IOProfile(String8("primary"), AUDIO_PORT_ROLE_SINK, module);
7514    profile->mSamplingRates.add(8000);
7515    profile->mFormats.add(AUDIO_FORMAT_PCM_16_BIT);
7516    profile->mChannelMasks.add(AUDIO_CHANNEL_IN_MONO);
7517    profile->mSupportedDevices.add(defaultInputDevice);
7518    module->mInputProfiles.add(profile);
7519
7520    mHwModules.add(module);
7521}
7522
7523audio_stream_type_t AudioPolicyManager::streamTypefromAttributesInt(const audio_attributes_t *attr)
7524{
7525    // flags to stream type mapping
7526    if ((attr->flags & AUDIO_FLAG_AUDIBILITY_ENFORCED) == AUDIO_FLAG_AUDIBILITY_ENFORCED) {
7527        return AUDIO_STREAM_ENFORCED_AUDIBLE;
7528    }
7529    if ((attr->flags & AUDIO_FLAG_SCO) == AUDIO_FLAG_SCO) {
7530        return AUDIO_STREAM_BLUETOOTH_SCO;
7531    }
7532
7533    // usage to stream type mapping
7534    switch (attr->usage) {
7535    case AUDIO_USAGE_MEDIA:
7536    case AUDIO_USAGE_GAME:
7537    case AUDIO_USAGE_ASSISTANCE_NAVIGATION_GUIDANCE:
7538        return AUDIO_STREAM_MUSIC;
7539    case AUDIO_USAGE_ASSISTANCE_ACCESSIBILITY:
7540        if (isStreamActive(AUDIO_STREAM_ALARM)) {
7541            return AUDIO_STREAM_ALARM;
7542        }
7543        if (isStreamActive(AUDIO_STREAM_RING)) {
7544            return AUDIO_STREAM_RING;
7545        }
7546        if (isInCall()) {
7547            return AUDIO_STREAM_VOICE_CALL;
7548        }
7549        return AUDIO_STREAM_ACCESSIBILITY;
7550    case AUDIO_USAGE_ASSISTANCE_SONIFICATION:
7551        return AUDIO_STREAM_SYSTEM;
7552    case AUDIO_USAGE_VOICE_COMMUNICATION:
7553        return AUDIO_STREAM_VOICE_CALL;
7554
7555    case AUDIO_USAGE_VOICE_COMMUNICATION_SIGNALLING:
7556        return AUDIO_STREAM_DTMF;
7557
7558    case AUDIO_USAGE_ALARM:
7559        return AUDIO_STREAM_ALARM;
7560    case AUDIO_USAGE_NOTIFICATION_TELEPHONY_RINGTONE:
7561        return AUDIO_STREAM_RING;
7562
7563    case AUDIO_USAGE_NOTIFICATION:
7564    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_REQUEST:
7565    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_INSTANT:
7566    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_DELAYED:
7567    case AUDIO_USAGE_NOTIFICATION_EVENT:
7568        return AUDIO_STREAM_NOTIFICATION;
7569
7570    case AUDIO_USAGE_UNKNOWN:
7571    default:
7572        return AUDIO_STREAM_MUSIC;
7573    }
7574}
7575
7576bool AudioPolicyManager::isValidAttributes(const audio_attributes_t *paa) {
7577    // has flags that map to a strategy?
7578    if ((paa->flags & (AUDIO_FLAG_AUDIBILITY_ENFORCED | AUDIO_FLAG_SCO | AUDIO_FLAG_BEACON)) != 0) {
7579        return true;
7580    }
7581
7582    // has known usage?
7583    switch (paa->usage) {
7584    case AUDIO_USAGE_UNKNOWN:
7585    case AUDIO_USAGE_MEDIA:
7586    case AUDIO_USAGE_VOICE_COMMUNICATION:
7587    case AUDIO_USAGE_VOICE_COMMUNICATION_SIGNALLING:
7588    case AUDIO_USAGE_ALARM:
7589    case AUDIO_USAGE_NOTIFICATION:
7590    case AUDIO_USAGE_NOTIFICATION_TELEPHONY_RINGTONE:
7591    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_REQUEST:
7592    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_INSTANT:
7593    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_DELAYED:
7594    case AUDIO_USAGE_NOTIFICATION_EVENT:
7595    case AUDIO_USAGE_ASSISTANCE_ACCESSIBILITY:
7596    case AUDIO_USAGE_ASSISTANCE_NAVIGATION_GUIDANCE:
7597    case AUDIO_USAGE_ASSISTANCE_SONIFICATION:
7598    case AUDIO_USAGE_GAME:
7599        break;
7600    default:
7601        return false;
7602    }
7603    return true;
7604}
7605
7606}; // namespace android
7607