AudioPolicyManagerBase.cpp revision 66707435156d8d99d795271a7bd54943065b4c2d 
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 "AudioPolicyManagerBase"
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
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
34#include <utils/Log.h>
35#include <hardware_legacy/AudioPolicyManagerBase.h>
36#include <hardware/audio_effect.h>
37#include <hardware/audio.h>
38#include <math.h>
39#include <hardware_legacy/audio_policy_conf.h>
40
41namespace android_audio_legacy {
42
43// ----------------------------------------------------------------------------
44// AudioPolicyInterface implementation
45// ----------------------------------------------------------------------------
46
47
48status_t AudioPolicyManagerBase::setDeviceConnectionState(audio_devices_t device,
49                                                  AudioSystem::device_connection_state state,
50                                                  const char *device_address)
51{
52    SortedVector <audio_io_handle_t> outputs;
53
54    ALOGV("setDeviceConnectionState() device: %x, state %d, address %s", device, state, device_address);
55
56    // connect/disconnect only 1 device at a time
57    if (!audio_is_output_device(device) && !audio_is_input_device(device)) return BAD_VALUE;
58
59    if (strlen(device_address) >= MAX_DEVICE_ADDRESS_LEN) {
60        ALOGE("setDeviceConnectionState() invalid address: %s", device_address);
61        return BAD_VALUE;
62    }
63
64    // handle output devices
65    if (audio_is_output_device(device)) {
66
67        if (!mHasA2dp && audio_is_a2dp_device(device)) {
68            ALOGE("setDeviceConnectionState() invalid A2DP device: %x", device);
69            return BAD_VALUE;
70        }
71        if (!mHasUsb && audio_is_usb_device(device)) {
72            ALOGE("setDeviceConnectionState() invalid USB audio device: %x", device);
73            return BAD_VALUE;
74        }
75        if (!mHasRemoteSubmix && audio_is_remote_submix_device((audio_devices_t)device)) {
76            ALOGE("setDeviceConnectionState() invalid remote submix audio device: %x", device);
77            return BAD_VALUE;
78        }
79
80        // save a copy of the opened output descriptors before any output is opened or closed
81        // by checkOutputsForDevice(). This will be needed by checkOutputForAllStrategies()
82        mPreviousOutputs = mOutputs;
83        switch (state)
84        {
85        // handle output device connection
86        case AudioSystem::DEVICE_STATE_AVAILABLE:
87            if (mAvailableOutputDevices & device) {
88                ALOGW("setDeviceConnectionState() device already connected: %x", device);
89                return INVALID_OPERATION;
90            }
91            ALOGV("setDeviceConnectionState() connecting device %x", device);
92
93            if (checkOutputsForDevice(device, state, outputs) != NO_ERROR) {
94                return INVALID_OPERATION;
95            }
96            ALOGV("setDeviceConnectionState() checkOutputsForDevice() returned %d outputs",
97                  outputs.size());
98            // register new device as available
99            mAvailableOutputDevices = (audio_devices_t)(mAvailableOutputDevices | device);
100
101            if (!outputs.isEmpty()) {
102                String8 paramStr;
103                if (mHasA2dp && audio_is_a2dp_device(device)) {
104                    // handle A2DP device connection
105                    AudioParameter param;
106                    param.add(String8(AUDIO_PARAMETER_A2DP_SINK_ADDRESS), String8(device_address));
107                    paramStr = param.toString();
108                    mA2dpDeviceAddress = String8(device_address, MAX_DEVICE_ADDRESS_LEN);
109                    mA2dpSuspended = false;
110                } else if (audio_is_bluetooth_sco_device(device)) {
111                    // handle SCO device connection
112                    mScoDeviceAddress = String8(device_address, MAX_DEVICE_ADDRESS_LEN);
113                } else if (mHasUsb && audio_is_usb_device(device)) {
114                    // handle USB device connection
115                    mUsbCardAndDevice = String8(device_address, MAX_DEVICE_ADDRESS_LEN);
116                    paramStr = mUsbCardAndDevice;
117                }
118                // not currently handling multiple simultaneous submixes: ignoring remote submix
119                //   case and address
120                if (!paramStr.isEmpty()) {
121                    for (size_t i = 0; i < outputs.size(); i++) {
122                        mpClientInterface->setParameters(outputs[i], paramStr);
123                    }
124                }
125            }
126            break;
127        // handle output device disconnection
128        case AudioSystem::DEVICE_STATE_UNAVAILABLE: {
129            if (!(mAvailableOutputDevices & device)) {
130                ALOGW("setDeviceConnectionState() device not connected: %x", device);
131                return INVALID_OPERATION;
132            }
133
134            ALOGV("setDeviceConnectionState() disconnecting device %x", device);
135            // remove device from available output devices
136            mAvailableOutputDevices = (audio_devices_t)(mAvailableOutputDevices & ~device);
137
138            checkOutputsForDevice(device, state, outputs);
139            if (mHasA2dp && audio_is_a2dp_device(device)) {
140                // handle A2DP device disconnection
141                mA2dpDeviceAddress = "";
142                mA2dpSuspended = false;
143            } else if (audio_is_bluetooth_sco_device(device)) {
144                // handle SCO device disconnection
145                mScoDeviceAddress = "";
146            } else if (mHasUsb && audio_is_usb_device(device)) {
147                // handle USB device disconnection
148                mUsbCardAndDevice = "";
149            }
150            // not currently handling multiple simultaneous submixes: ignoring remote submix
151            //   case and address
152            } break;
153
154        default:
155            ALOGE("setDeviceConnectionState() invalid state: %x", state);
156            return BAD_VALUE;
157        }
158
159        checkA2dpSuspend();
160        checkOutputForAllStrategies();
161        // outputs must be closed after checkOutputForAllStrategies() is executed
162        if (!outputs.isEmpty()) {
163            for (size_t i = 0; i < outputs.size(); i++) {
164                // close unused outputs after device disconnection or direct outputs that have been
165                // opened by checkOutputsForDevice() to query dynamic parameters
166                if ((state == AudioSystem::DEVICE_STATE_UNAVAILABLE) ||
167                        (mOutputs.valueFor(outputs[i])->mFlags & AUDIO_OUTPUT_FLAG_DIRECT)) {
168                    closeOutput(outputs[i]);
169                }
170            }
171        }
172
173        updateDevicesAndOutputs();
174        for (size_t i = 0; i < mOutputs.size(); i++) {
175            // do not force device change on duplicated output because if device is 0, it will
176            // also force a device 0 for the two outputs it is duplicated to which may override
177            // a valid device selection on those outputs.
178            setOutputDevice(mOutputs.keyAt(i),
179                            getNewDevice(mOutputs.keyAt(i), true /*fromCache*/),
180                            !mOutputs.valueAt(i)->isDuplicated(),
181                            0);
182        }
183
184        if (device == AUDIO_DEVICE_OUT_WIRED_HEADSET) {
185            device = AUDIO_DEVICE_IN_WIRED_HEADSET;
186        } else if (device == AUDIO_DEVICE_OUT_BLUETOOTH_SCO ||
187                   device == AUDIO_DEVICE_OUT_BLUETOOTH_SCO_HEADSET ||
188                   device == AUDIO_DEVICE_OUT_BLUETOOTH_SCO_CARKIT) {
189            device = AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET;
190        } else {
191            return NO_ERROR;
192        }
193    }
194    // handle input devices
195    if (audio_is_input_device(device)) {
196
197        switch (state)
198        {
199        // handle input device connection
200        case AudioSystem::DEVICE_STATE_AVAILABLE: {
201            if (mAvailableInputDevices & device) {
202                ALOGW("setDeviceConnectionState() device already connected: %d", device);
203                return INVALID_OPERATION;
204            }
205            mAvailableInputDevices = mAvailableInputDevices | (device & ~AUDIO_DEVICE_BIT_IN);
206            }
207            break;
208
209        // handle input device disconnection
210        case AudioSystem::DEVICE_STATE_UNAVAILABLE: {
211            if (!(mAvailableInputDevices & device)) {
212                ALOGW("setDeviceConnectionState() device not connected: %d", device);
213                return INVALID_OPERATION;
214            }
215            mAvailableInputDevices = (audio_devices_t) (mAvailableInputDevices & ~device);
216            } break;
217
218        default:
219            ALOGE("setDeviceConnectionState() invalid state: %x", state);
220            return BAD_VALUE;
221        }
222
223        audio_io_handle_t activeInput = getActiveInput();
224        if (activeInput != 0) {
225            AudioInputDescriptor *inputDesc = mInputs.valueFor(activeInput);
226            audio_devices_t newDevice = getDeviceForInputSource(inputDesc->mInputSource);
227            if ((newDevice != AUDIO_DEVICE_NONE) && (newDevice != inputDesc->mDevice)) {
228                ALOGV("setDeviceConnectionState() changing device from %x to %x for input %d",
229                        inputDesc->mDevice, newDevice, activeInput);
230                inputDesc->mDevice = newDevice;
231                AudioParameter param = AudioParameter();
232                param.addInt(String8(AudioParameter::keyRouting), (int)newDevice);
233                mpClientInterface->setParameters(activeInput, param.toString());
234            }
235        }
236
237        return NO_ERROR;
238    }
239
240    ALOGW("setDeviceConnectionState() invalid device: %x", device);
241    return BAD_VALUE;
242}
243
244AudioSystem::device_connection_state AudioPolicyManagerBase::getDeviceConnectionState(audio_devices_t device,
245                                                  const char *device_address)
246{
247    AudioSystem::device_connection_state state = AudioSystem::DEVICE_STATE_UNAVAILABLE;
248    String8 address = String8(device_address);
249    if (audio_is_output_device(device)) {
250        if (device & mAvailableOutputDevices) {
251            if (audio_is_a2dp_device(device) &&
252                (!mHasA2dp || (address != "" && mA2dpDeviceAddress != address))) {
253                return state;
254            }
255            if (audio_is_bluetooth_sco_device(device) &&
256                address != "" && mScoDeviceAddress != address) {
257                return state;
258            }
259            if (audio_is_usb_device(device) &&
260                (!mHasUsb || (address != "" && mUsbCardAndDevice != address))) {
261                ALOGE("getDeviceConnectionState() invalid device: %x", device);
262                return state;
263            }
264            if (audio_is_remote_submix_device((audio_devices_t)device) && !mHasRemoteSubmix) {
265                return state;
266            }
267            state = AudioSystem::DEVICE_STATE_AVAILABLE;
268        }
269    } else if (audio_is_input_device(device)) {
270        if (device & mAvailableInputDevices) {
271            state = AudioSystem::DEVICE_STATE_AVAILABLE;
272        }
273    }
274
275    return state;
276}
277
278void AudioPolicyManagerBase::setPhoneState(int state)
279{
280    ALOGV("setPhoneState() state %d", state);
281    audio_devices_t newDevice = AUDIO_DEVICE_NONE;
282    if (state < 0 || state >= AudioSystem::NUM_MODES) {
283        ALOGW("setPhoneState() invalid state %d", state);
284        return;
285    }
286
287    if (state == mPhoneState ) {
288        ALOGW("setPhoneState() setting same state %d", state);
289        return;
290    }
291
292    // if leaving call state, handle special case of active streams
293    // pertaining to sonification strategy see handleIncallSonification()
294    if (isInCall()) {
295        ALOGV("setPhoneState() in call state management: new state is %d", state);
296        for (int stream = 0; stream < AudioSystem::NUM_STREAM_TYPES; stream++) {
297            handleIncallSonification(stream, false, true);
298        }
299    }
300
301    // store previous phone state for management of sonification strategy below
302    int oldState = mPhoneState;
303    mPhoneState = state;
304    bool force = false;
305
306    // are we entering or starting a call
307    if (!isStateInCall(oldState) && isStateInCall(state)) {
308        ALOGV("  Entering call in setPhoneState()");
309        // force routing command to audio hardware when starting a call
310        // even if no device change is needed
311        force = true;
312    } else if (isStateInCall(oldState) && !isStateInCall(state)) {
313        ALOGV("  Exiting call in setPhoneState()");
314        // force routing command to audio hardware when exiting a call
315        // even if no device change is needed
316        force = true;
317    } else if (isStateInCall(state) && (state != oldState)) {
318        ALOGV("  Switching between telephony and VoIP in setPhoneState()");
319        // force routing command to audio hardware when switching between telephony and VoIP
320        // even if no device change is needed
321        force = true;
322    }
323
324    // check for device and output changes triggered by new phone state
325    newDevice = getNewDevice(mPrimaryOutput, false /*fromCache*/);
326    checkA2dpSuspend();
327    checkOutputForAllStrategies();
328    updateDevicesAndOutputs();
329
330    AudioOutputDescriptor *hwOutputDesc = mOutputs.valueFor(mPrimaryOutput);
331
332    // force routing command to audio hardware when ending call
333    // even if no device change is needed
334    if (isStateInCall(oldState) && newDevice == AUDIO_DEVICE_NONE) {
335        newDevice = hwOutputDesc->device();
336    }
337
338    int delayMs = 0;
339    if (isStateInCall(state)) {
340        nsecs_t sysTime = systemTime();
341        for (size_t i = 0; i < mOutputs.size(); i++) {
342            AudioOutputDescriptor *desc = mOutputs.valueAt(i);
343            // mute media and sonification strategies and delay device switch by the largest
344            // latency of any output where either strategy is active.
345            // This avoid sending the ring tone or music tail into the earpiece or headset.
346            if ((desc->isStrategyActive(STRATEGY_MEDIA,
347                                     SONIFICATION_HEADSET_MUSIC_DELAY,
348                                     sysTime) ||
349                    desc->isStrategyActive(STRATEGY_SONIFICATION,
350                                         SONIFICATION_HEADSET_MUSIC_DELAY,
351                                         sysTime)) &&
352                    (delayMs < (int)desc->mLatency*2)) {
353                delayMs = desc->mLatency*2;
354            }
355            setStrategyMute(STRATEGY_MEDIA, true, mOutputs.keyAt(i));
356            setStrategyMute(STRATEGY_MEDIA, false, mOutputs.keyAt(i), MUTE_TIME_MS,
357                getDeviceForStrategy(STRATEGY_MEDIA, true /*fromCache*/));
358            setStrategyMute(STRATEGY_SONIFICATION, true, mOutputs.keyAt(i));
359            setStrategyMute(STRATEGY_SONIFICATION, false, mOutputs.keyAt(i), MUTE_TIME_MS,
360                getDeviceForStrategy(STRATEGY_SONIFICATION, true /*fromCache*/));
361        }
362    }
363
364    // change routing is necessary
365    setOutputDevice(mPrimaryOutput, newDevice, force, delayMs);
366
367    // if entering in call state, handle special case of active streams
368    // pertaining to sonification strategy see handleIncallSonification()
369    if (isStateInCall(state)) {
370        ALOGV("setPhoneState() in call state management: new state is %d", state);
371        for (int stream = 0; stream < AudioSystem::NUM_STREAM_TYPES; stream++) {
372            handleIncallSonification(stream, true, true);
373        }
374    }
375
376    // Flag that ringtone volume must be limited to music volume until we exit MODE_RINGTONE
377    if (state == AudioSystem::MODE_RINGTONE &&
378        isStreamActive(AudioSystem::MUSIC, SONIFICATION_HEADSET_MUSIC_DELAY)) {
379        mLimitRingtoneVolume = true;
380    } else {
381        mLimitRingtoneVolume = false;
382    }
383}
384
385void AudioPolicyManagerBase::setForceUse(AudioSystem::force_use usage, AudioSystem::forced_config config)
386{
387    ALOGV("setForceUse() usage %d, config %d, mPhoneState %d", usage, config, mPhoneState);
388
389    bool forceVolumeReeval = false;
390    switch(usage) {
391    case AudioSystem::FOR_COMMUNICATION:
392        if (config != AudioSystem::FORCE_SPEAKER && config != AudioSystem::FORCE_BT_SCO &&
393            config != AudioSystem::FORCE_NONE) {
394            ALOGW("setForceUse() invalid config %d for FOR_COMMUNICATION", config);
395            return;
396        }
397        forceVolumeReeval = true;
398        mForceUse[usage] = config;
399        break;
400    case AudioSystem::FOR_MEDIA:
401        if (config != AudioSystem::FORCE_HEADPHONES && config != AudioSystem::FORCE_BT_A2DP &&
402            config != AudioSystem::FORCE_WIRED_ACCESSORY &&
403            config != AudioSystem::FORCE_ANALOG_DOCK &&
404            config != AudioSystem::FORCE_DIGITAL_DOCK && config != AudioSystem::FORCE_NONE &&
405            config != AudioSystem::FORCE_NO_BT_A2DP) {
406            ALOGW("setForceUse() invalid config %d for FOR_MEDIA", config);
407            return;
408        }
409        mForceUse[usage] = config;
410        break;
411    case AudioSystem::FOR_RECORD:
412        if (config != AudioSystem::FORCE_BT_SCO && config != AudioSystem::FORCE_WIRED_ACCESSORY &&
413            config != AudioSystem::FORCE_NONE) {
414            ALOGW("setForceUse() invalid config %d for FOR_RECORD", config);
415            return;
416        }
417        mForceUse[usage] = config;
418        break;
419    case AudioSystem::FOR_DOCK:
420        if (config != AudioSystem::FORCE_NONE && config != AudioSystem::FORCE_BT_CAR_DOCK &&
421            config != AudioSystem::FORCE_BT_DESK_DOCK &&
422            config != AudioSystem::FORCE_WIRED_ACCESSORY &&
423            config != AudioSystem::FORCE_ANALOG_DOCK &&
424            config != AudioSystem::FORCE_DIGITAL_DOCK) {
425            ALOGW("setForceUse() invalid config %d for FOR_DOCK", config);
426        }
427        forceVolumeReeval = true;
428        mForceUse[usage] = config;
429        break;
430    case AudioSystem::FOR_SYSTEM:
431        if (config != AudioSystem::FORCE_NONE &&
432            config != AudioSystem::FORCE_SYSTEM_ENFORCED) {
433            ALOGW("setForceUse() invalid config %d for FOR_SYSTEM", config);
434        }
435        forceVolumeReeval = true;
436        mForceUse[usage] = config;
437        break;
438    default:
439        ALOGW("setForceUse() invalid usage %d", usage);
440        break;
441    }
442
443    // check for device and output changes triggered by new force usage
444    checkA2dpSuspend();
445    checkOutputForAllStrategies();
446    updateDevicesAndOutputs();
447    for (size_t i = 0; i < mOutputs.size(); i++) {
448        audio_io_handle_t output = mOutputs.keyAt(i);
449        audio_devices_t newDevice = getNewDevice(output, true /*fromCache*/);
450        setOutputDevice(output, newDevice, (newDevice != AUDIO_DEVICE_NONE));
451        if (forceVolumeReeval && (newDevice != AUDIO_DEVICE_NONE)) {
452            applyStreamVolumes(output, newDevice, 0, true);
453        }
454    }
455
456    audio_io_handle_t activeInput = getActiveInput();
457    if (activeInput != 0) {
458        AudioInputDescriptor *inputDesc = mInputs.valueFor(activeInput);
459        audio_devices_t newDevice = getDeviceForInputSource(inputDesc->mInputSource);
460        if ((newDevice != AUDIO_DEVICE_NONE) && (newDevice != inputDesc->mDevice)) {
461            ALOGV("setForceUse() changing device from %x to %x for input %d",
462                    inputDesc->mDevice, newDevice, activeInput);
463            inputDesc->mDevice = newDevice;
464            AudioParameter param = AudioParameter();
465            param.addInt(String8(AudioParameter::keyRouting), (int)newDevice);
466            mpClientInterface->setParameters(activeInput, param.toString());
467        }
468    }
469
470}
471
472AudioSystem::forced_config AudioPolicyManagerBase::getForceUse(AudioSystem::force_use usage)
473{
474    return mForceUse[usage];
475}
476
477void AudioPolicyManagerBase::setSystemProperty(const char* property, const char* value)
478{
479    ALOGV("setSystemProperty() property %s, value %s", property, value);
480}
481
482AudioPolicyManagerBase::IOProfile *AudioPolicyManagerBase::getProfileForDirectOutput(
483                                                               audio_devices_t device,
484                                                               uint32_t samplingRate,
485                                                               uint32_t format,
486                                                               uint32_t channelMask,
487                                                               audio_output_flags_t flags)
488{
489    for (size_t i = 0; i < mHwModules.size(); i++) {
490        if (mHwModules[i]->mHandle == 0) {
491            continue;
492        }
493        for (size_t j = 0; j < mHwModules[i]->mOutputProfiles.size(); j++) {
494           IOProfile *profile = mHwModules[i]->mOutputProfiles[j];
495           if (profile->isCompatibleProfile(device, samplingRate, format,
496                                           channelMask,
497                                           AUDIO_OUTPUT_FLAG_DIRECT)) {
498               if (mAvailableOutputDevices & profile->mSupportedDevices) {
499                   return mHwModules[i]->mOutputProfiles[j];
500               }
501           }
502        }
503    }
504    return 0;
505}
506
507audio_io_handle_t AudioPolicyManagerBase::getOutput(AudioSystem::stream_type stream,
508                                    uint32_t samplingRate,
509                                    uint32_t format,
510                                    uint32_t channelMask,
511                                    AudioSystem::output_flags flags)
512{
513    audio_io_handle_t output = 0;
514    uint32_t latency = 0;
515    routing_strategy strategy = getStrategy((AudioSystem::stream_type)stream);
516    audio_devices_t device = getDeviceForStrategy(strategy, false /*fromCache*/);
517    ALOGV("getOutput() stream %d, samplingRate %d, format %d, channelMask %x, flags %x",
518          stream, samplingRate, format, channelMask, flags);
519
520#ifdef AUDIO_POLICY_TEST
521    if (mCurOutput != 0) {
522        ALOGV("getOutput() test output mCurOutput %d, samplingRate %d, format %d, channelMask %x, mDirectOutput %d",
523                mCurOutput, mTestSamplingRate, mTestFormat, mTestChannels, mDirectOutput);
524
525        if (mTestOutputs[mCurOutput] == 0) {
526            ALOGV("getOutput() opening test output");
527            AudioOutputDescriptor *outputDesc = new AudioOutputDescriptor(NULL);
528            outputDesc->mDevice = mTestDevice;
529            outputDesc->mSamplingRate = mTestSamplingRate;
530            outputDesc->mFormat = mTestFormat;
531            outputDesc->mChannelMask = mTestChannels;
532            outputDesc->mLatency = mTestLatencyMs;
533            outputDesc->mFlags = (audio_output_flags_t)(mDirectOutput ? AudioSystem::OUTPUT_FLAG_DIRECT : 0);
534            outputDesc->mRefCount[stream] = 0;
535            mTestOutputs[mCurOutput] = mpClientInterface->openOutput(0, &outputDesc->mDevice,
536                                            &outputDesc->mSamplingRate,
537                                            &outputDesc->mFormat,
538                                            &outputDesc->mChannelMask,
539                                            &outputDesc->mLatency,
540                                            outputDesc->mFlags);
541            if (mTestOutputs[mCurOutput]) {
542                AudioParameter outputCmd = AudioParameter();
543                outputCmd.addInt(String8("set_id"),mCurOutput);
544                mpClientInterface->setParameters(mTestOutputs[mCurOutput],outputCmd.toString());
545                addOutput(mTestOutputs[mCurOutput], outputDesc);
546            }
547        }
548        return mTestOutputs[mCurOutput];
549    }
550#endif //AUDIO_POLICY_TEST
551
552    // open a direct output if required by specified parameters
553    IOProfile *profile = getProfileForDirectOutput(device,
554                                                   samplingRate,
555                                                   format,
556                                                   channelMask,
557                                                   (audio_output_flags_t)flags);
558    if (profile != NULL) {
559        AudioOutputDescriptor *outputDesc = NULL;
560
561        for (size_t i = 0; i < mOutputs.size(); i++) {
562            AudioOutputDescriptor *desc = mOutputs.valueAt(i);
563            if (!desc->isDuplicated() && (profile == desc->mProfile)) {
564                outputDesc = desc;
565                // reuse direct output if currently open and configured with same parameters
566                if ((samplingRate == outputDesc->mSamplingRate) &&
567                        (format == outputDesc->mFormat) &&
568                        (channelMask == outputDesc->mChannelMask)) {
569                    outputDesc->mDirectOpenCount++;
570                    ALOGV("getOutput() reusing direct output %d", output);
571                    return mOutputs.keyAt(i);
572                }
573            }
574        }
575        // close direct output if currently open and configured with different parameters
576        if (outputDesc != NULL) {
577            closeOutput(outputDesc->mId);
578        }
579        outputDesc = new AudioOutputDescriptor(profile);
580        outputDesc->mDevice = device;
581        outputDesc->mSamplingRate = samplingRate;
582        outputDesc->mFormat = (audio_format_t)format;
583        outputDesc->mChannelMask = (audio_channel_mask_t)channelMask;
584        outputDesc->mLatency = 0;
585        outputDesc->mFlags = (audio_output_flags_t)(flags | AUDIO_OUTPUT_FLAG_DIRECT);;
586        outputDesc->mRefCount[stream] = 0;
587        outputDesc->mStopTime[stream] = 0;
588        outputDesc->mDirectOpenCount = 1;
589        output = mpClientInterface->openOutput(profile->mModule->mHandle,
590                                        &outputDesc->mDevice,
591                                        &outputDesc->mSamplingRate,
592                                        &outputDesc->mFormat,
593                                        &outputDesc->mChannelMask,
594                                        &outputDesc->mLatency,
595                                        outputDesc->mFlags);
596
597        // only accept an output with the requested parameters
598        if (output == 0 ||
599            (samplingRate != 0 && samplingRate != outputDesc->mSamplingRate) ||
600            (format != 0 && format != outputDesc->mFormat) ||
601            (channelMask != 0 && channelMask != outputDesc->mChannelMask)) {
602            ALOGV("getOutput() failed opening direct output: output %d samplingRate %d %d,"
603                    "format %d %d, channelMask %04x %04x", output, samplingRate,
604                    outputDesc->mSamplingRate, format, outputDesc->mFormat, channelMask,
605                    outputDesc->mChannelMask);
606            if (output != 0) {
607                mpClientInterface->closeOutput(output);
608            }
609            delete outputDesc;
610            return 0;
611        }
612        addOutput(output, outputDesc);
613        mPreviousOutputs = mOutputs;
614        ALOGV("getOutput() returns new direct output %d", output);
615        return output;
616    }
617
618    // ignoring channel mask due to downmix capability in mixer
619
620    // open a non direct output
621
622    // get which output is suitable for the specified stream. The actual routing change will happen
623    // when startOutput() will be called
624    SortedVector<audio_io_handle_t> outputs = getOutputsForDevice(device, mOutputs);
625
626    output = selectOutput(outputs, flags);
627
628    ALOGW_IF((output ==0), "getOutput() could not find output for stream %d, samplingRate %d,"
629            "format %d, channels %x, flags %x", stream, samplingRate, format, channelMask, flags);
630
631    ALOGV("getOutput() returns output %d", output);
632
633    return output;
634}
635
636audio_io_handle_t AudioPolicyManagerBase::selectOutput(const SortedVector<audio_io_handle_t>& outputs,
637                                                       AudioSystem::output_flags flags)
638{
639    // select one output among several that provide a path to a particular device or set of
640    // devices (the list was previously build by getOutputsForDevice()).
641    // The priority is as follows:
642    // 1: the output with the highest number of requested policy flags
643    // 2: the primary output
644    // 3: the first output in the list
645
646    if (outputs.size() == 0) {
647        return 0;
648    }
649    if (outputs.size() == 1) {
650        return outputs[0];
651    }
652
653    int maxCommonFlags = 0;
654    audio_io_handle_t outputFlags = 0;
655    audio_io_handle_t outputPrimary = 0;
656
657    for (size_t i = 0; i < outputs.size(); i++) {
658        AudioOutputDescriptor *outputDesc = mOutputs.valueFor(outputs[i]);
659        if (!outputDesc->isDuplicated()) {
660            int commonFlags = (int)AudioSystem::popCount(outputDesc->mProfile->mFlags & flags);
661            if (commonFlags > maxCommonFlags) {
662                outputFlags = outputs[i];
663                maxCommonFlags = commonFlags;
664                ALOGV("selectOutput() commonFlags for output %d, %04x", outputs[i], commonFlags);
665            }
666            if (outputDesc->mProfile->mFlags & AUDIO_OUTPUT_FLAG_PRIMARY) {
667                outputPrimary = outputs[i];
668            }
669        }
670    }
671
672    if (outputFlags != 0) {
673        return outputFlags;
674    }
675    if (outputPrimary != 0) {
676        return outputPrimary;
677    }
678
679    return outputs[0];
680}
681
682status_t AudioPolicyManagerBase::startOutput(audio_io_handle_t output,
683                                             AudioSystem::stream_type stream,
684                                             int session)
685{
686    ALOGV("startOutput() output %d, stream %d, session %d", output, stream, session);
687    ssize_t index = mOutputs.indexOfKey(output);
688    if (index < 0) {
689        ALOGW("startOutput() unknow output %d", output);
690        return BAD_VALUE;
691    }
692
693    AudioOutputDescriptor *outputDesc = mOutputs.valueAt(index);
694
695    // increment usage count for this stream on the requested output:
696    // NOTE that the usage count is the same for duplicated output and hardware output which is
697    // necessary for a correct control of hardware output routing by startOutput() and stopOutput()
698    outputDesc->changeRefCount(stream, 1);
699
700    if (outputDesc->mRefCount[stream] == 1) {
701        audio_devices_t newDevice = getNewDevice(output, false /*fromCache*/);
702        routing_strategy strategy = getStrategy(stream);
703        bool shouldWait = (strategy == STRATEGY_SONIFICATION) ||
704                            (strategy == STRATEGY_SONIFICATION_RESPECTFUL);
705        uint32_t waitMs = 0;
706        bool force = false;
707        for (size_t i = 0; i < mOutputs.size(); i++) {
708            AudioOutputDescriptor *desc = mOutputs.valueAt(i);
709            if (desc != outputDesc) {
710                // force a device change if any other output is managed by the same hw
711                // module and has a current device selection that differs from selected device.
712                // In this case, the audio HAL must receive the new device selection so that it can
713                // change the device currently selected by the other active output.
714                if (outputDesc->sharesHwModuleWith(desc) &&
715                    desc->device() != newDevice) {
716                    force = true;
717                }
718                // wait for audio on other active outputs to be presented when starting
719                // a notification so that audio focus effect can propagate.
720                uint32_t latency = desc->latency();
721                if (shouldWait && desc->isActive(latency * 2) && (waitMs < latency)) {
722                    waitMs = latency;
723                }
724            }
725        }
726        uint32_t muteWaitMs = setOutputDevice(output, newDevice, force);
727
728        // handle special case for sonification while in call
729        if (isInCall()) {
730            handleIncallSonification(stream, true, false);
731        }
732
733        // apply volume rules for current stream and device if necessary
734        checkAndSetVolume(stream,
735                          mStreams[stream].getVolumeIndex(newDevice),
736                          output,
737                          newDevice);
738
739        // update the outputs if starting an output with a stream that can affect notification
740        // routing
741        handleNotificationRoutingForStream(stream);
742        if (waitMs > muteWaitMs) {
743            usleep((waitMs - muteWaitMs) * 2 * 1000);
744        }
745    }
746    return NO_ERROR;
747}
748
749
750status_t AudioPolicyManagerBase::stopOutput(audio_io_handle_t output,
751                                            AudioSystem::stream_type stream,
752                                            int session)
753{
754    ALOGV("stopOutput() output %d, stream %d, session %d", output, stream, session);
755    ssize_t index = mOutputs.indexOfKey(output);
756    if (index < 0) {
757        ALOGW("stopOutput() unknow output %d", output);
758        return BAD_VALUE;
759    }
760
761    AudioOutputDescriptor *outputDesc = mOutputs.valueAt(index);
762
763    // handle special case for sonification while in call
764    if (isInCall()) {
765        handleIncallSonification(stream, false, false);
766    }
767
768    if (outputDesc->mRefCount[stream] > 0) {
769        // decrement usage count of this stream on the output
770        outputDesc->changeRefCount(stream, -1);
771        // store time at which the stream was stopped - see isStreamActive()
772        if (outputDesc->mRefCount[stream] == 0) {
773            outputDesc->mStopTime[stream] = systemTime();
774            audio_devices_t newDevice = getNewDevice(output, false /*fromCache*/);
775            // delay the device switch by twice the latency because stopOutput() is executed when
776            // the track stop() command is received and at that time the audio track buffer can
777            // still contain data that needs to be drained. The latency only covers the audio HAL
778            // and kernel buffers. Also the latency does not always include additional delay in the
779            // audio path (audio DSP, CODEC ...)
780            setOutputDevice(output, newDevice, false, outputDesc->mLatency*2);
781
782            // force restoring the device selection on other active outputs if it differs from the
783            // one being selected for this output
784            for (size_t i = 0; i < mOutputs.size(); i++) {
785                audio_io_handle_t curOutput = mOutputs.keyAt(i);
786                AudioOutputDescriptor *desc = mOutputs.valueAt(i);
787                if (curOutput != output &&
788                        desc->isActive() &&
789                        outputDesc->sharesHwModuleWith(desc) &&
790                        newDevice != desc->device()) {
791                    setOutputDevice(curOutput,
792                                    getNewDevice(curOutput, false /*fromCache*/),
793                                    true,
794                                    outputDesc->mLatency*2);
795                }
796            }
797            // update the outputs if stopping one with a stream that can affect notification routing
798            handleNotificationRoutingForStream(stream);
799        }
800        return NO_ERROR;
801    } else {
802        ALOGW("stopOutput() refcount is already 0 for output %d", output);
803        return INVALID_OPERATION;
804    }
805}
806
807void AudioPolicyManagerBase::releaseOutput(audio_io_handle_t output)
808{
809    ALOGV("releaseOutput() %d", output);
810    ssize_t index = mOutputs.indexOfKey(output);
811    if (index < 0) {
812        ALOGW("releaseOutput() releasing unknown output %d", output);
813        return;
814    }
815
816#ifdef AUDIO_POLICY_TEST
817    int testIndex = testOutputIndex(output);
818    if (testIndex != 0) {
819        AudioOutputDescriptor *outputDesc = mOutputs.valueAt(index);
820        if (outputDesc->isActive()) {
821            mpClientInterface->closeOutput(output);
822            delete mOutputs.valueAt(index);
823            mOutputs.removeItem(output);
824            mTestOutputs[testIndex] = 0;
825        }
826        return;
827    }
828#endif //AUDIO_POLICY_TEST
829
830    AudioOutputDescriptor *desc = mOutputs.valueAt(index);
831    if (desc->mFlags & AudioSystem::OUTPUT_FLAG_DIRECT) {
832        if (desc->mDirectOpenCount <= 0) {
833            ALOGW("releaseOutput() invalid open count %d for output %d",
834                                                              desc->mDirectOpenCount, output);
835            return;
836        }
837        if (--desc->mDirectOpenCount == 0) {
838            closeOutput(output);
839        }
840    }
841
842}
843
844audio_io_handle_t AudioPolicyManagerBase::getInput(int inputSource,
845                                    uint32_t samplingRate,
846                                    uint32_t format,
847                                    uint32_t channelMask,
848                                    AudioSystem::audio_in_acoustics acoustics)
849{
850    audio_io_handle_t input = 0;
851    audio_devices_t device = getDeviceForInputSource(inputSource);
852
853    ALOGV("getInput() inputSource %d, samplingRate %d, format %d, channelMask %x, acoustics %x",
854          inputSource, samplingRate, format, channelMask, acoustics);
855
856    if (device == AUDIO_DEVICE_NONE) {
857        ALOGW("getInput() could not find device for inputSource %d", inputSource);
858        return 0;
859    }
860
861    // adapt channel selection to input source
862    switch(inputSource) {
863    case AUDIO_SOURCE_VOICE_UPLINK:
864        channelMask = AudioSystem::CHANNEL_IN_VOICE_UPLINK;
865        break;
866    case AUDIO_SOURCE_VOICE_DOWNLINK:
867        channelMask = AudioSystem::CHANNEL_IN_VOICE_DNLINK;
868        break;
869    case AUDIO_SOURCE_VOICE_CALL:
870        channelMask = (AudioSystem::CHANNEL_IN_VOICE_UPLINK | AudioSystem::CHANNEL_IN_VOICE_DNLINK);
871        break;
872    default:
873        break;
874    }
875
876    IOProfile *profile = getInputProfile(device,
877                                         samplingRate,
878                                         format,
879                                         channelMask);
880    if (profile == NULL) {
881        ALOGW("getInput() could not find profile for device %04x, samplingRate %d, format %d,"
882                "channelMask %04x",
883                device, samplingRate, format, channelMask);
884        return 0;
885    }
886
887    if (profile->mModule->mHandle == 0) {
888        ALOGE("getInput(): HW module %s not opened", profile->mModule->mName);
889        return 0;
890    }
891
892    AudioInputDescriptor *inputDesc = new AudioInputDescriptor(profile);
893
894    inputDesc->mInputSource = inputSource;
895    inputDesc->mDevice = device;
896    inputDesc->mSamplingRate = samplingRate;
897    inputDesc->mFormat = (audio_format_t)format;
898    inputDesc->mChannelMask = (audio_channel_mask_t)channelMask;
899    inputDesc->mRefCount = 0;
900    input = mpClientInterface->openInput(profile->mModule->mHandle,
901                                    &inputDesc->mDevice,
902                                    &inputDesc->mSamplingRate,
903                                    &inputDesc->mFormat,
904                                    &inputDesc->mChannelMask);
905
906    // only accept input with the exact requested set of parameters
907    if (input == 0 ||
908        (samplingRate != inputDesc->mSamplingRate) ||
909        (format != inputDesc->mFormat) ||
910        (channelMask != inputDesc->mChannelMask)) {
911        ALOGV("getInput() failed opening input: samplingRate %d, format %d, channelMask %d",
912                samplingRate, format, channelMask);
913        if (input != 0) {
914            mpClientInterface->closeInput(input);
915        }
916        delete inputDesc;
917        return 0;
918    }
919    mInputs.add(input, inputDesc);
920    return input;
921}
922
923status_t AudioPolicyManagerBase::startInput(audio_io_handle_t input)
924{
925    ALOGV("startInput() input %d", input);
926    ssize_t index = mInputs.indexOfKey(input);
927    if (index < 0) {
928        ALOGW("startInput() unknow input %d", input);
929        return BAD_VALUE;
930    }
931    AudioInputDescriptor *inputDesc = mInputs.valueAt(index);
932
933#ifdef AUDIO_POLICY_TEST
934    if (mTestInput == 0)
935#endif //AUDIO_POLICY_TEST
936    {
937        // refuse 2 active AudioRecord clients at the same time
938        if (getActiveInput() != 0) {
939            ALOGW("startInput() input %d failed: other input already started", input);
940            return INVALID_OPERATION;
941        }
942    }
943
944    audio_devices_t newDevice = getDeviceForInputSource(inputDesc->mInputSource);
945    if ((newDevice != AUDIO_DEVICE_NONE) && (newDevice != inputDesc->mDevice)) {
946        inputDesc->mDevice = newDevice;
947    }
948    AudioParameter param = AudioParameter();
949    param.addInt(String8(AudioParameter::keyRouting), (int)inputDesc->mDevice);
950
951    param.addInt(String8(AudioParameter::keyInputSource), (int)inputDesc->mInputSource);
952    ALOGV("AudioPolicyManager::startInput() input source = %d", inputDesc->mInputSource);
953
954    mpClientInterface->setParameters(input, param.toString());
955
956    inputDesc->mRefCount = 1;
957    return NO_ERROR;
958}
959
960status_t AudioPolicyManagerBase::stopInput(audio_io_handle_t input)
961{
962    ALOGV("stopInput() input %d", input);
963    ssize_t index = mInputs.indexOfKey(input);
964    if (index < 0) {
965        ALOGW("stopInput() unknow input %d", input);
966        return BAD_VALUE;
967    }
968    AudioInputDescriptor *inputDesc = mInputs.valueAt(index);
969
970    if (inputDesc->mRefCount == 0) {
971        ALOGW("stopInput() input %d already stopped", input);
972        return INVALID_OPERATION;
973    } else {
974        AudioParameter param = AudioParameter();
975        param.addInt(String8(AudioParameter::keyRouting), 0);
976        mpClientInterface->setParameters(input, param.toString());
977        inputDesc->mRefCount = 0;
978        return NO_ERROR;
979    }
980}
981
982void AudioPolicyManagerBase::releaseInput(audio_io_handle_t input)
983{
984    ALOGV("releaseInput() %d", input);
985    ssize_t index = mInputs.indexOfKey(input);
986    if (index < 0) {
987        ALOGW("releaseInput() releasing unknown input %d", input);
988        return;
989    }
990    mpClientInterface->closeInput(input);
991    delete mInputs.valueAt(index);
992    mInputs.removeItem(input);
993    ALOGV("releaseInput() exit");
994}
995
996void AudioPolicyManagerBase::initStreamVolume(AudioSystem::stream_type stream,
997                                            int indexMin,
998                                            int indexMax)
999{
1000    ALOGV("initStreamVolume() stream %d, min %d, max %d", stream , indexMin, indexMax);
1001    if (indexMin < 0 || indexMin >= indexMax) {
1002        ALOGW("initStreamVolume() invalid index limits for stream %d, min %d, max %d", stream , indexMin, indexMax);
1003        return;
1004    }
1005    mStreams[stream].mIndexMin = indexMin;
1006    mStreams[stream].mIndexMax = indexMax;
1007}
1008
1009status_t AudioPolicyManagerBase::setStreamVolumeIndex(AudioSystem::stream_type stream,
1010                                                      int index,
1011                                                      audio_devices_t device)
1012{
1013
1014    if ((index < mStreams[stream].mIndexMin) || (index > mStreams[stream].mIndexMax)) {
1015        return BAD_VALUE;
1016    }
1017    if (!audio_is_output_device(device)) {
1018        return BAD_VALUE;
1019    }
1020
1021    // Force max volume if stream cannot be muted
1022    if (!mStreams[stream].mCanBeMuted) index = mStreams[stream].mIndexMax;
1023
1024    ALOGV("setStreamVolumeIndex() stream %d, device %04x, index %d",
1025          stream, device, index);
1026
1027    // if device is AUDIO_DEVICE_OUT_DEFAULT set default value and
1028    // clear all device specific values
1029    if (device == AUDIO_DEVICE_OUT_DEFAULT) {
1030        mStreams[stream].mIndexCur.clear();
1031    }
1032    mStreams[stream].mIndexCur.add(device, index);
1033
1034    // compute and apply stream volume on all outputs according to connected device
1035    status_t status = NO_ERROR;
1036    for (size_t i = 0; i < mOutputs.size(); i++) {
1037        audio_devices_t curDevice =
1038                getDeviceForVolume(mOutputs.valueAt(i)->device());
1039        if (device == curDevice) {
1040            status_t volStatus = checkAndSetVolume(stream, index, mOutputs.keyAt(i), curDevice);
1041            if (volStatus != NO_ERROR) {
1042                status = volStatus;
1043            }
1044        }
1045    }
1046    return status;
1047}
1048
1049status_t AudioPolicyManagerBase::getStreamVolumeIndex(AudioSystem::stream_type stream,
1050                                                      int *index,
1051                                                      audio_devices_t device)
1052{
1053    if (index == NULL) {
1054        return BAD_VALUE;
1055    }
1056    if (!audio_is_output_device(device)) {
1057        return BAD_VALUE;
1058    }
1059    // if device is AUDIO_DEVICE_OUT_DEFAULT, return volume for device corresponding to
1060    // the strategy the stream belongs to.
1061    if (device == AUDIO_DEVICE_OUT_DEFAULT) {
1062        device = getDeviceForStrategy(getStrategy(stream), true /*fromCache*/);
1063    }
1064    device = getDeviceForVolume(device);
1065
1066    *index =  mStreams[stream].getVolumeIndex(device);
1067    ALOGV("getStreamVolumeIndex() stream %d device %08x index %d", stream, device, *index);
1068    return NO_ERROR;
1069}
1070
1071audio_io_handle_t AudioPolicyManagerBase::getOutputForEffect(const effect_descriptor_t *desc)
1072{
1073    ALOGV("getOutputForEffect()");
1074    // apply simple rule where global effects are attached to the same output as MUSIC streams
1075
1076    routing_strategy strategy = getStrategy(AudioSystem::MUSIC);
1077    audio_devices_t device = getDeviceForStrategy(strategy, false /*fromCache*/);
1078    SortedVector<audio_io_handle_t> dstOutputs = getOutputsForDevice(device, mOutputs);
1079    int outIdx = 0;
1080    for (size_t i = 0; i < dstOutputs.size(); i++) {
1081        AudioOutputDescriptor *desc = mOutputs.valueFor(dstOutputs[i]);
1082        if (desc->mFlags & AUDIO_OUTPUT_FLAG_DEEP_BUFFER) {
1083            outIdx = i;
1084        }
1085    }
1086    return dstOutputs[outIdx];
1087}
1088
1089status_t AudioPolicyManagerBase::registerEffect(const effect_descriptor_t *desc,
1090                                audio_io_handle_t io,
1091                                uint32_t strategy,
1092                                int session,
1093                                int id)
1094{
1095    ssize_t index = mOutputs.indexOfKey(io);
1096    if (index < 0) {
1097        index = mInputs.indexOfKey(io);
1098        if (index < 0) {
1099            ALOGW("registerEffect() unknown io %d", io);
1100            return INVALID_OPERATION;
1101        }
1102    }
1103
1104    if (mTotalEffectsMemory + desc->memoryUsage > getMaxEffectsMemory()) {
1105        ALOGW("registerEffect() memory limit exceeded for Fx %s, Memory %d KB",
1106                desc->name, desc->memoryUsage);
1107        return INVALID_OPERATION;
1108    }
1109    mTotalEffectsMemory += desc->memoryUsage;
1110    ALOGV("registerEffect() effect %s, io %d, strategy %d session %d id %d",
1111            desc->name, io, strategy, session, id);
1112    ALOGV("registerEffect() memory %d, total memory %d", desc->memoryUsage, mTotalEffectsMemory);
1113
1114    EffectDescriptor *pDesc = new EffectDescriptor();
1115    memcpy (&pDesc->mDesc, desc, sizeof(effect_descriptor_t));
1116    pDesc->mIo = io;
1117    pDesc->mStrategy = (routing_strategy)strategy;
1118    pDesc->mSession = session;
1119    pDesc->mEnabled = false;
1120
1121    mEffects.add(id, pDesc);
1122
1123    return NO_ERROR;
1124}
1125
1126status_t AudioPolicyManagerBase::unregisterEffect(int id)
1127{
1128    ssize_t index = mEffects.indexOfKey(id);
1129    if (index < 0) {
1130        ALOGW("unregisterEffect() unknown effect ID %d", id);
1131        return INVALID_OPERATION;
1132    }
1133
1134    EffectDescriptor *pDesc = mEffects.valueAt(index);
1135
1136    setEffectEnabled(pDesc, false);
1137
1138    if (mTotalEffectsMemory < pDesc->mDesc.memoryUsage) {
1139        ALOGW("unregisterEffect() memory %d too big for total %d",
1140                pDesc->mDesc.memoryUsage, mTotalEffectsMemory);
1141        pDesc->mDesc.memoryUsage = mTotalEffectsMemory;
1142    }
1143    mTotalEffectsMemory -= pDesc->mDesc.memoryUsage;
1144    ALOGV("unregisterEffect() effect %s, ID %d, memory %d total memory %d",
1145            pDesc->mDesc.name, id, pDesc->mDesc.memoryUsage, mTotalEffectsMemory);
1146
1147    mEffects.removeItem(id);
1148    delete pDesc;
1149
1150    return NO_ERROR;
1151}
1152
1153status_t AudioPolicyManagerBase::setEffectEnabled(int id, bool enabled)
1154{
1155    ssize_t index = mEffects.indexOfKey(id);
1156    if (index < 0) {
1157        ALOGW("unregisterEffect() unknown effect ID %d", id);
1158        return INVALID_OPERATION;
1159    }
1160
1161    return setEffectEnabled(mEffects.valueAt(index), enabled);
1162}
1163
1164status_t AudioPolicyManagerBase::setEffectEnabled(EffectDescriptor *pDesc, bool enabled)
1165{
1166    if (enabled == pDesc->mEnabled) {
1167        ALOGV("setEffectEnabled(%s) effect already %s",
1168             enabled?"true":"false", enabled?"enabled":"disabled");
1169        return INVALID_OPERATION;
1170    }
1171
1172    if (enabled) {
1173        if (mTotalEffectsCpuLoad + pDesc->mDesc.cpuLoad > getMaxEffectsCpuLoad()) {
1174            ALOGW("setEffectEnabled(true) CPU Load limit exceeded for Fx %s, CPU %f MIPS",
1175                 pDesc->mDesc.name, (float)pDesc->mDesc.cpuLoad/10);
1176            return INVALID_OPERATION;
1177        }
1178        mTotalEffectsCpuLoad += pDesc->mDesc.cpuLoad;
1179        ALOGV("setEffectEnabled(true) total CPU %d", mTotalEffectsCpuLoad);
1180    } else {
1181        if (mTotalEffectsCpuLoad < pDesc->mDesc.cpuLoad) {
1182            ALOGW("setEffectEnabled(false) CPU load %d too high for total %d",
1183                    pDesc->mDesc.cpuLoad, mTotalEffectsCpuLoad);
1184            pDesc->mDesc.cpuLoad = mTotalEffectsCpuLoad;
1185        }
1186        mTotalEffectsCpuLoad -= pDesc->mDesc.cpuLoad;
1187        ALOGV("setEffectEnabled(false) total CPU %d", mTotalEffectsCpuLoad);
1188    }
1189    pDesc->mEnabled = enabled;
1190    return NO_ERROR;
1191}
1192
1193bool AudioPolicyManagerBase::isStreamActive(int stream, uint32_t inPastMs) const
1194{
1195    nsecs_t sysTime = systemTime();
1196    for (size_t i = 0; i < mOutputs.size(); i++) {
1197        const AudioOutputDescriptor *outputDesc = mOutputs.valueAt(i);
1198        if (outputDesc->isStreamActive((AudioSystem::stream_type)stream, inPastMs, sysTime)) {
1199            return true;
1200        }
1201    }
1202    return false;
1203}
1204
1205bool AudioPolicyManagerBase::isStreamActiveRemotely(int stream, uint32_t inPastMs) const
1206{
1207    nsecs_t sysTime = systemTime();
1208    for (size_t i = 0; i < mOutputs.size(); i++) {
1209        const AudioOutputDescriptor *outputDesc = mOutputs.valueAt(i);
1210        if (((outputDesc->device() & APM_AUDIO_OUT_DEVICE_REMOTE_ALL) != 0) &&
1211                outputDesc->isStreamActive((AudioSystem::stream_type)stream, inPastMs, sysTime)) {
1212            return true;
1213        }
1214    }
1215    return false;
1216}
1217
1218bool AudioPolicyManagerBase::isSourceActive(audio_source_t source) const
1219{
1220    for (size_t i = 0; i < mInputs.size(); i++) {
1221        const AudioInputDescriptor * inputDescriptor = mInputs.valueAt(i);
1222        if ((inputDescriptor->mInputSource == (int) source)
1223                && (inputDescriptor->mRefCount > 0)) {
1224            return true;
1225        }
1226    }
1227    return false;
1228}
1229
1230
1231
1232status_t AudioPolicyManagerBase::dump(int fd)
1233{
1234    const size_t SIZE = 256;
1235    char buffer[SIZE];
1236    String8 result;
1237
1238    snprintf(buffer, SIZE, "\nAudioPolicyManager Dump: %p\n", this);
1239    result.append(buffer);
1240
1241    snprintf(buffer, SIZE, " Primary Output: %d\n", mPrimaryOutput);
1242    result.append(buffer);
1243    snprintf(buffer, SIZE, " A2DP device address: %s\n", mA2dpDeviceAddress.string());
1244    result.append(buffer);
1245    snprintf(buffer, SIZE, " SCO device address: %s\n", mScoDeviceAddress.string());
1246    result.append(buffer);
1247    snprintf(buffer, SIZE, " USB audio ALSA %s\n", mUsbCardAndDevice.string());
1248    result.append(buffer);
1249    snprintf(buffer, SIZE, " Output devices: %08x\n", mAvailableOutputDevices);
1250    result.append(buffer);
1251    snprintf(buffer, SIZE, " Input devices: %08x\n", mAvailableInputDevices);
1252    result.append(buffer);
1253    snprintf(buffer, SIZE, " Phone state: %d\n", mPhoneState);
1254    result.append(buffer);
1255    snprintf(buffer, SIZE, " Force use for communications %d\n", mForceUse[AudioSystem::FOR_COMMUNICATION]);
1256    result.append(buffer);
1257    snprintf(buffer, SIZE, " Force use for media %d\n", mForceUse[AudioSystem::FOR_MEDIA]);
1258    result.append(buffer);
1259    snprintf(buffer, SIZE, " Force use for record %d\n", mForceUse[AudioSystem::FOR_RECORD]);
1260    result.append(buffer);
1261    snprintf(buffer, SIZE, " Force use for dock %d\n", mForceUse[AudioSystem::FOR_DOCK]);
1262    result.append(buffer);
1263    snprintf(buffer, SIZE, " Force use for system %d\n", mForceUse[AudioSystem::FOR_SYSTEM]);
1264    result.append(buffer);
1265    write(fd, result.string(), result.size());
1266
1267
1268    snprintf(buffer, SIZE, "\nHW Modules dump:\n");
1269    write(fd, buffer, strlen(buffer));
1270    for (size_t i = 0; i < mHwModules.size(); i++) {
1271        snprintf(buffer, SIZE, "- HW Module %d:\n", i + 1);
1272        write(fd, buffer, strlen(buffer));
1273        mHwModules[i]->dump(fd);
1274    }
1275
1276    snprintf(buffer, SIZE, "\nOutputs dump:\n");
1277    write(fd, buffer, strlen(buffer));
1278    for (size_t i = 0; i < mOutputs.size(); i++) {
1279        snprintf(buffer, SIZE, "- Output %d dump:\n", mOutputs.keyAt(i));
1280        write(fd, buffer, strlen(buffer));
1281        mOutputs.valueAt(i)->dump(fd);
1282    }
1283
1284    snprintf(buffer, SIZE, "\nInputs dump:\n");
1285    write(fd, buffer, strlen(buffer));
1286    for (size_t i = 0; i < mInputs.size(); i++) {
1287        snprintf(buffer, SIZE, "- Input %d dump:\n", mInputs.keyAt(i));
1288        write(fd, buffer, strlen(buffer));
1289        mInputs.valueAt(i)->dump(fd);
1290    }
1291
1292    snprintf(buffer, SIZE, "\nStreams dump:\n");
1293    write(fd, buffer, strlen(buffer));
1294    snprintf(buffer, SIZE,
1295             " Stream  Can be muted  Index Min  Index Max  Index Cur [device : index]...\n");
1296    write(fd, buffer, strlen(buffer));
1297    for (size_t i = 0; i < AudioSystem::NUM_STREAM_TYPES; i++) {
1298        snprintf(buffer, SIZE, " %02d      ", i);
1299        write(fd, buffer, strlen(buffer));
1300        mStreams[i].dump(fd);
1301    }
1302
1303    snprintf(buffer, SIZE, "\nTotal Effects CPU: %f MIPS, Total Effects memory: %d KB\n",
1304            (float)mTotalEffectsCpuLoad/10, mTotalEffectsMemory);
1305    write(fd, buffer, strlen(buffer));
1306
1307    snprintf(buffer, SIZE, "Registered effects:\n");
1308    write(fd, buffer, strlen(buffer));
1309    for (size_t i = 0; i < mEffects.size(); i++) {
1310        snprintf(buffer, SIZE, "- Effect %d dump:\n", mEffects.keyAt(i));
1311        write(fd, buffer, strlen(buffer));
1312        mEffects.valueAt(i)->dump(fd);
1313    }
1314
1315
1316    return NO_ERROR;
1317}
1318
1319// ----------------------------------------------------------------------------
1320// AudioPolicyManagerBase
1321// ----------------------------------------------------------------------------
1322
1323AudioPolicyManagerBase::AudioPolicyManagerBase(AudioPolicyClientInterface *clientInterface)
1324    :
1325#ifdef AUDIO_POLICY_TEST
1326    Thread(false),
1327#endif //AUDIO_POLICY_TEST
1328    mPrimaryOutput((audio_io_handle_t)0),
1329    mAvailableOutputDevices(AUDIO_DEVICE_NONE),
1330    mPhoneState(AudioSystem::MODE_NORMAL),
1331    mLimitRingtoneVolume(false), mLastVoiceVolume(-1.0f),
1332    mTotalEffectsCpuLoad(0), mTotalEffectsMemory(0),
1333    mA2dpSuspended(false), mHasA2dp(false), mHasUsb(false), mHasRemoteSubmix(false)
1334{
1335    mpClientInterface = clientInterface;
1336
1337    for (int i = 0; i < AudioSystem::NUM_FORCE_USE; i++) {
1338        mForceUse[i] = AudioSystem::FORCE_NONE;
1339    }
1340
1341    initializeVolumeCurves();
1342
1343    mA2dpDeviceAddress = String8("");
1344    mScoDeviceAddress = String8("");
1345    mUsbCardAndDevice = String8("");
1346
1347    if (loadAudioPolicyConfig(AUDIO_POLICY_VENDOR_CONFIG_FILE) != NO_ERROR) {
1348        if (loadAudioPolicyConfig(AUDIO_POLICY_CONFIG_FILE) != NO_ERROR) {
1349            ALOGE("could not load audio policy configuration file, setting defaults");
1350            defaultAudioPolicyConfig();
1351        }
1352    }
1353
1354    // open all output streams needed to access attached devices
1355    for (size_t i = 0; i < mHwModules.size(); i++) {
1356        mHwModules[i]->mHandle = mpClientInterface->loadHwModule(mHwModules[i]->mName);
1357        if (mHwModules[i]->mHandle == 0) {
1358            ALOGW("could not open HW module %s", mHwModules[i]->mName);
1359            continue;
1360        }
1361        // open all output streams needed to access attached devices
1362        for (size_t j = 0; j < mHwModules[i]->mOutputProfiles.size(); j++)
1363        {
1364            const IOProfile *outProfile = mHwModules[i]->mOutputProfiles[j];
1365
1366            if (outProfile->mSupportedDevices & mAttachedOutputDevices) {
1367                AudioOutputDescriptor *outputDesc = new AudioOutputDescriptor(outProfile);
1368                outputDesc->mDevice = (audio_devices_t)(mDefaultOutputDevice &
1369                                                            outProfile->mSupportedDevices);
1370                audio_io_handle_t output = mpClientInterface->openOutput(
1371                                                outProfile->mModule->mHandle,
1372                                                &outputDesc->mDevice,
1373                                                &outputDesc->mSamplingRate,
1374                                                &outputDesc->mFormat,
1375                                                &outputDesc->mChannelMask,
1376                                                &outputDesc->mLatency,
1377                                                outputDesc->mFlags);
1378                if (output == 0) {
1379                    delete outputDesc;
1380                } else {
1381                    mAvailableOutputDevices = (audio_devices_t)(mAvailableOutputDevices |
1382                                            (outProfile->mSupportedDevices & mAttachedOutputDevices));
1383                    if (mPrimaryOutput == 0 &&
1384                            outProfile->mFlags & AUDIO_OUTPUT_FLAG_PRIMARY) {
1385                        mPrimaryOutput = output;
1386                    }
1387                    addOutput(output, outputDesc);
1388                    setOutputDevice(output,
1389                                    (audio_devices_t)(mDefaultOutputDevice &
1390                                                        outProfile->mSupportedDevices),
1391                                    true);
1392                }
1393            }
1394        }
1395    }
1396
1397    ALOGE_IF((mAttachedOutputDevices & ~mAvailableOutputDevices),
1398             "Not output found for attached devices %08x",
1399             (mAttachedOutputDevices & ~mAvailableOutputDevices));
1400
1401    ALOGE_IF((mPrimaryOutput == 0), "Failed to open primary output");
1402
1403    updateDevicesAndOutputs();
1404
1405#ifdef AUDIO_POLICY_TEST
1406    if (mPrimaryOutput != 0) {
1407        AudioParameter outputCmd = AudioParameter();
1408        outputCmd.addInt(String8("set_id"), 0);
1409        mpClientInterface->setParameters(mPrimaryOutput, outputCmd.toString());
1410
1411        mTestDevice = AUDIO_DEVICE_OUT_SPEAKER;
1412        mTestSamplingRate = 44100;
1413        mTestFormat = AudioSystem::PCM_16_BIT;
1414        mTestChannels =  AudioSystem::CHANNEL_OUT_STEREO;
1415        mTestLatencyMs = 0;
1416        mCurOutput = 0;
1417        mDirectOutput = false;
1418        for (int i = 0; i < NUM_TEST_OUTPUTS; i++) {
1419            mTestOutputs[i] = 0;
1420        }
1421
1422        const size_t SIZE = 256;
1423        char buffer[SIZE];
1424        snprintf(buffer, SIZE, "AudioPolicyManagerTest");
1425        run(buffer, ANDROID_PRIORITY_AUDIO);
1426    }
1427#endif //AUDIO_POLICY_TEST
1428}
1429
1430AudioPolicyManagerBase::~AudioPolicyManagerBase()
1431{
1432#ifdef AUDIO_POLICY_TEST
1433    exit();
1434#endif //AUDIO_POLICY_TEST
1435   for (size_t i = 0; i < mOutputs.size(); i++) {
1436        mpClientInterface->closeOutput(mOutputs.keyAt(i));
1437        delete mOutputs.valueAt(i);
1438   }
1439   for (size_t i = 0; i < mInputs.size(); i++) {
1440        mpClientInterface->closeInput(mInputs.keyAt(i));
1441        delete mInputs.valueAt(i);
1442   }
1443   for (size_t i = 0; i < mHwModules.size(); i++) {
1444        delete mHwModules[i];
1445   }
1446}
1447
1448status_t AudioPolicyManagerBase::initCheck()
1449{
1450    return (mPrimaryOutput == 0) ? NO_INIT : NO_ERROR;
1451}
1452
1453#ifdef AUDIO_POLICY_TEST
1454bool AudioPolicyManagerBase::threadLoop()
1455{
1456    ALOGV("entering threadLoop()");
1457    while (!exitPending())
1458    {
1459        String8 command;
1460        int valueInt;
1461        String8 value;
1462
1463        Mutex::Autolock _l(mLock);
1464        mWaitWorkCV.waitRelative(mLock, milliseconds(50));
1465
1466        command = mpClientInterface->getParameters(0, String8("test_cmd_policy"));
1467        AudioParameter param = AudioParameter(command);
1468
1469        if (param.getInt(String8("test_cmd_policy"), valueInt) == NO_ERROR &&
1470            valueInt != 0) {
1471            ALOGV("Test command %s received", command.string());
1472            String8 target;
1473            if (param.get(String8("target"), target) != NO_ERROR) {
1474                target = "Manager";
1475            }
1476            if (param.getInt(String8("test_cmd_policy_output"), valueInt) == NO_ERROR) {
1477                param.remove(String8("test_cmd_policy_output"));
1478                mCurOutput = valueInt;
1479            }
1480            if (param.get(String8("test_cmd_policy_direct"), value) == NO_ERROR) {
1481                param.remove(String8("test_cmd_policy_direct"));
1482                if (value == "false") {
1483                    mDirectOutput = false;
1484                } else if (value == "true") {
1485                    mDirectOutput = true;
1486                }
1487            }
1488            if (param.getInt(String8("test_cmd_policy_input"), valueInt) == NO_ERROR) {
1489                param.remove(String8("test_cmd_policy_input"));
1490                mTestInput = valueInt;
1491            }
1492
1493            if (param.get(String8("test_cmd_policy_format"), value) == NO_ERROR) {
1494                param.remove(String8("test_cmd_policy_format"));
1495                int format = AudioSystem::INVALID_FORMAT;
1496                if (value == "PCM 16 bits") {
1497                    format = AudioSystem::PCM_16_BIT;
1498                } else if (value == "PCM 8 bits") {
1499                    format = AudioSystem::PCM_8_BIT;
1500                } else if (value == "Compressed MP3") {
1501                    format = AudioSystem::MP3;
1502                }
1503                if (format != AudioSystem::INVALID_FORMAT) {
1504                    if (target == "Manager") {
1505                        mTestFormat = format;
1506                    } else if (mTestOutputs[mCurOutput] != 0) {
1507                        AudioParameter outputParam = AudioParameter();
1508                        outputParam.addInt(String8("format"), format);
1509                        mpClientInterface->setParameters(mTestOutputs[mCurOutput], outputParam.toString());
1510                    }
1511                }
1512            }
1513            if (param.get(String8("test_cmd_policy_channels"), value) == NO_ERROR) {
1514                param.remove(String8("test_cmd_policy_channels"));
1515                int channels = 0;
1516
1517                if (value == "Channels Stereo") {
1518                    channels =  AudioSystem::CHANNEL_OUT_STEREO;
1519                } else if (value == "Channels Mono") {
1520                    channels =  AudioSystem::CHANNEL_OUT_MONO;
1521                }
1522                if (channels != 0) {
1523                    if (target == "Manager") {
1524                        mTestChannels = channels;
1525                    } else if (mTestOutputs[mCurOutput] != 0) {
1526                        AudioParameter outputParam = AudioParameter();
1527                        outputParam.addInt(String8("channels"), channels);
1528                        mpClientInterface->setParameters(mTestOutputs[mCurOutput], outputParam.toString());
1529                    }
1530                }
1531            }
1532            if (param.getInt(String8("test_cmd_policy_sampleRate"), valueInt) == NO_ERROR) {
1533                param.remove(String8("test_cmd_policy_sampleRate"));
1534                if (valueInt >= 0 && valueInt <= 96000) {
1535                    int samplingRate = valueInt;
1536                    if (target == "Manager") {
1537                        mTestSamplingRate = samplingRate;
1538                    } else if (mTestOutputs[mCurOutput] != 0) {
1539                        AudioParameter outputParam = AudioParameter();
1540                        outputParam.addInt(String8("sampling_rate"), samplingRate);
1541                        mpClientInterface->setParameters(mTestOutputs[mCurOutput], outputParam.toString());
1542                    }
1543                }
1544            }
1545
1546            if (param.get(String8("test_cmd_policy_reopen"), value) == NO_ERROR) {
1547                param.remove(String8("test_cmd_policy_reopen"));
1548
1549                AudioOutputDescriptor *outputDesc = mOutputs.valueFor(mPrimaryOutput);
1550                mpClientInterface->closeOutput(mPrimaryOutput);
1551
1552                audio_module_handle_t moduleHandle = outputDesc->mModule->mHandle;
1553
1554                delete mOutputs.valueFor(mPrimaryOutput);
1555                mOutputs.removeItem(mPrimaryOutput);
1556
1557                AudioOutputDescriptor *outputDesc = new AudioOutputDescriptor(NULL);
1558                outputDesc->mDevice = AUDIO_DEVICE_OUT_SPEAKER;
1559                mPrimaryOutput = mpClientInterface->openOutput(moduleHandle,
1560                                                &outputDesc->mDevice,
1561                                                &outputDesc->mSamplingRate,
1562                                                &outputDesc->mFormat,
1563                                                &outputDesc->mChannelMask,
1564                                                &outputDesc->mLatency,
1565                                                outputDesc->mFlags);
1566                if (mPrimaryOutput == 0) {
1567                    ALOGE("Failed to reopen hardware output stream, samplingRate: %d, format %d, channels %d",
1568                            outputDesc->mSamplingRate, outputDesc->mFormat, outputDesc->mChannelMask);
1569                } else {
1570                    AudioParameter outputCmd = AudioParameter();
1571                    outputCmd.addInt(String8("set_id"), 0);
1572                    mpClientInterface->setParameters(mPrimaryOutput, outputCmd.toString());
1573                    addOutput(mPrimaryOutput, outputDesc);
1574                }
1575            }
1576
1577
1578            mpClientInterface->setParameters(0, String8("test_cmd_policy="));
1579        }
1580    }
1581    return false;
1582}
1583
1584void AudioPolicyManagerBase::exit()
1585{
1586    {
1587        AutoMutex _l(mLock);
1588        requestExit();
1589        mWaitWorkCV.signal();
1590    }
1591    requestExitAndWait();
1592}
1593
1594int AudioPolicyManagerBase::testOutputIndex(audio_io_handle_t output)
1595{
1596    for (int i = 0; i < NUM_TEST_OUTPUTS; i++) {
1597        if (output == mTestOutputs[i]) return i;
1598    }
1599    return 0;
1600}
1601#endif //AUDIO_POLICY_TEST
1602
1603// ---
1604
1605void AudioPolicyManagerBase::addOutput(audio_io_handle_t id, AudioOutputDescriptor *outputDesc)
1606{
1607    outputDesc->mId = id;
1608    mOutputs.add(id, outputDesc);
1609}
1610
1611
1612status_t AudioPolicyManagerBase::checkOutputsForDevice(audio_devices_t device,
1613                                                       AudioSystem::device_connection_state state,
1614                                                       SortedVector<audio_io_handle_t>& outputs)
1615{
1616    AudioOutputDescriptor *desc;
1617
1618    if (state == AudioSystem::DEVICE_STATE_AVAILABLE) {
1619        // first list already open outputs that can be routed to this device
1620        for (size_t i = 0; i < mOutputs.size(); i++) {
1621            desc = mOutputs.valueAt(i);
1622            if (!desc->isDuplicated() && (desc->mProfile->mSupportedDevices & device)) {
1623                ALOGV("checkOutputsForDevice(): adding opened output %d", mOutputs.keyAt(i));
1624                outputs.add(mOutputs.keyAt(i));
1625            }
1626        }
1627        // then look for output profiles that can be routed to this device
1628        SortedVector<IOProfile *> profiles;
1629        for (size_t i = 0; i < mHwModules.size(); i++)
1630        {
1631            if (mHwModules[i]->mHandle == 0) {
1632                continue;
1633            }
1634            for (size_t j = 0; j < mHwModules[i]->mOutputProfiles.size(); j++)
1635            {
1636                if (mHwModules[i]->mOutputProfiles[j]->mSupportedDevices & device) {
1637                    ALOGV("checkOutputsForDevice(): adding profile %d from module %d", j, i);
1638                    profiles.add(mHwModules[i]->mOutputProfiles[j]);
1639                }
1640            }
1641        }
1642
1643        if (profiles.isEmpty() && outputs.isEmpty()) {
1644            ALOGW("checkOutputsForDevice(): No output available for device %04x", device);
1645            return BAD_VALUE;
1646        }
1647
1648        // open outputs for matching profiles if needed. Direct outputs are also opened to
1649        // query for dynamic parameters and will be closed later by setDeviceConnectionState()
1650        for (ssize_t profile_index = 0; profile_index < (ssize_t)profiles.size(); profile_index++) {
1651            IOProfile *profile = profiles[profile_index];
1652
1653            // nothing to do if one output is already opened for this profile
1654            size_t j;
1655            for (j = 0; j < mOutputs.size(); j++) {
1656                desc = mOutputs.valueAt(j);
1657                if (!desc->isDuplicated() && desc->mProfile == profile) {
1658                    break;
1659                }
1660            }
1661            if (j != mOutputs.size()) {
1662                continue;
1663            }
1664
1665            ALOGV("opening output for device %08x", device);
1666            desc = new AudioOutputDescriptor(profile);
1667            desc->mDevice = device;
1668            audio_io_handle_t output = mpClientInterface->openOutput(profile->mModule->mHandle,
1669                                                                       &desc->mDevice,
1670                                                                       &desc->mSamplingRate,
1671                                                                       &desc->mFormat,
1672                                                                       &desc->mChannelMask,
1673                                                                       &desc->mLatency,
1674                                                                       desc->mFlags);
1675            if (output != 0) {
1676                if (desc->mFlags & AUDIO_OUTPUT_FLAG_DIRECT) {
1677                    String8 reply;
1678                    char *value;
1679                    if (profile->mSamplingRates[0] == 0) {
1680                        reply = mpClientInterface->getParameters(output,
1681                                                String8(AUDIO_PARAMETER_STREAM_SUP_SAMPLING_RATES));
1682                        ALOGV("checkOutputsForDevice() direct output sup sampling rates %s",
1683                                  reply.string());
1684                        value = strpbrk((char *)reply.string(), "=");
1685                        if (value != NULL) {
1686                            loadSamplingRates(value + 1, profile);
1687                        }
1688                    }
1689                    if (profile->mFormats[0] == 0) {
1690                        reply = mpClientInterface->getParameters(output,
1691                                                       String8(AUDIO_PARAMETER_STREAM_SUP_FORMATS));
1692                        ALOGV("checkOutputsForDevice() direct output sup formats %s",
1693                                  reply.string());
1694                        value = strpbrk((char *)reply.string(), "=");
1695                        if (value != NULL) {
1696                            loadFormats(value + 1, profile);
1697                        }
1698                    }
1699                    if (profile->mChannelMasks[0] == 0) {
1700                        reply = mpClientInterface->getParameters(output,
1701                                                      String8(AUDIO_PARAMETER_STREAM_SUP_CHANNELS));
1702                        ALOGV("checkOutputsForDevice() direct output sup channel masks %s",
1703                                  reply.string());
1704                        value = strpbrk((char *)reply.string(), "=");
1705                        if (value != NULL) {
1706                            loadOutChannels(value + 1, profile);
1707                        }
1708                    }
1709                    if (((profile->mSamplingRates[0] == 0) &&
1710                             (profile->mSamplingRates.size() < 2)) ||
1711                         ((profile->mFormats[0] == 0) &&
1712                             (profile->mFormats.size() < 2)) ||
1713                         ((profile->mFormats[0] == 0) &&
1714                             (profile->mChannelMasks.size() < 2))) {
1715                        ALOGW("checkOutputsForDevice() direct output missing param");
1716                        mpClientInterface->closeOutput(output);
1717                        output = 0;
1718                    } else {
1719                        addOutput(output, desc);
1720                    }
1721                } else {
1722                    audio_io_handle_t duplicatedOutput = 0;
1723                    // add output descriptor
1724                    addOutput(output, desc);
1725                    // set initial stream volume for device
1726                    applyStreamVolumes(output, device, 0, true);
1727
1728                    //TODO: configure audio effect output stage here
1729
1730                    // open a duplicating output thread for the new output and the primary output
1731                    duplicatedOutput = mpClientInterface->openDuplicateOutput(output,
1732                                                                              mPrimaryOutput);
1733                    if (duplicatedOutput != 0) {
1734                        // add duplicated output descriptor
1735                        AudioOutputDescriptor *dupOutputDesc = new AudioOutputDescriptor(NULL);
1736                        dupOutputDesc->mOutput1 = mOutputs.valueFor(mPrimaryOutput);
1737                        dupOutputDesc->mOutput2 = mOutputs.valueFor(output);
1738                        dupOutputDesc->mSamplingRate = desc->mSamplingRate;
1739                        dupOutputDesc->mFormat = desc->mFormat;
1740                        dupOutputDesc->mChannelMask = desc->mChannelMask;
1741                        dupOutputDesc->mLatency = desc->mLatency;
1742                        addOutput(duplicatedOutput, dupOutputDesc);
1743                        applyStreamVolumes(duplicatedOutput, device, 0, true);
1744                    } else {
1745                        ALOGW("checkOutputsForDevice() could not open dup output for %d and %d",
1746                                mPrimaryOutput, output);
1747                        mpClientInterface->closeOutput(output);
1748                        mOutputs.removeItem(output);
1749                        output = 0;
1750                    }
1751                }
1752            }
1753            if (output == 0) {
1754                ALOGW("checkOutputsForDevice() could not open output for device %x", device);
1755                delete desc;
1756                profiles.removeAt(profile_index);
1757                profile_index--;
1758            } else {
1759                outputs.add(output);
1760                ALOGV("checkOutputsForDevice(): adding output %d", output);
1761            }
1762        }
1763
1764        if (profiles.isEmpty()) {
1765            ALOGW("checkOutputsForDevice(): No output available for device %04x", device);
1766            return BAD_VALUE;
1767        }
1768    } else {
1769        // check if one opened output is not needed any more after disconnecting one device
1770        for (size_t i = 0; i < mOutputs.size(); i++) {
1771            desc = mOutputs.valueAt(i);
1772            if (!desc->isDuplicated() &&
1773                    !(desc->mProfile->mSupportedDevices & mAvailableOutputDevices)) {
1774                ALOGV("checkOutputsForDevice(): disconnecting adding output %d", mOutputs.keyAt(i));
1775                outputs.add(mOutputs.keyAt(i));
1776            }
1777        }
1778        for (size_t i = 0; i < mHwModules.size(); i++)
1779        {
1780            if (mHwModules[i]->mHandle == 0) {
1781                continue;
1782            }
1783            for (size_t j = 0; j < mHwModules[i]->mOutputProfiles.size(); j++)
1784            {
1785                IOProfile *profile = mHwModules[i]->mOutputProfiles[j];
1786                if ((profile->mSupportedDevices & device) &&
1787                        (profile->mFlags & AUDIO_OUTPUT_FLAG_DIRECT)) {
1788                    ALOGV("checkOutputsForDevice(): clearing direct output profile %d on module %d",
1789                          j, i);
1790                    if (profile->mSamplingRates[0] == 0) {
1791                        profile->mSamplingRates.clear();
1792                        profile->mSamplingRates.add(0);
1793                    }
1794                    if (profile->mFormats[0] == 0) {
1795                        profile->mFormats.clear();
1796                        profile->mFormats.add((audio_format_t)0);
1797                    }
1798                    if (profile->mChannelMasks[0] == 0) {
1799                        profile->mChannelMasks.clear();
1800                        profile->mChannelMasks.add((audio_channel_mask_t)0);
1801                    }
1802                }
1803            }
1804        }
1805    }
1806    return NO_ERROR;
1807}
1808
1809void AudioPolicyManagerBase::closeOutput(audio_io_handle_t output)
1810{
1811    ALOGV("closeOutput(%d)", output);
1812
1813    AudioOutputDescriptor *outputDesc = mOutputs.valueFor(output);
1814    if (outputDesc == NULL) {
1815        ALOGW("closeOutput() unknown output %d", output);
1816        return;
1817    }
1818
1819    // look for duplicated outputs connected to the output being removed.
1820    for (size_t i = 0; i < mOutputs.size(); i++) {
1821        AudioOutputDescriptor *dupOutputDesc = mOutputs.valueAt(i);
1822        if (dupOutputDesc->isDuplicated() &&
1823                (dupOutputDesc->mOutput1 == outputDesc ||
1824                dupOutputDesc->mOutput2 == outputDesc)) {
1825            AudioOutputDescriptor *outputDesc2;
1826            if (dupOutputDesc->mOutput1 == outputDesc) {
1827                outputDesc2 = dupOutputDesc->mOutput2;
1828            } else {
1829                outputDesc2 = dupOutputDesc->mOutput1;
1830            }
1831            // As all active tracks on duplicated output will be deleted,
1832            // and as they were also referenced on the other output, the reference
1833            // count for their stream type must be adjusted accordingly on
1834            // the other output.
1835            for (int j = 0; j < (int)AudioSystem::NUM_STREAM_TYPES; j++) {
1836                int refCount = dupOutputDesc->mRefCount[j];
1837                outputDesc2->changeRefCount((AudioSystem::stream_type)j,-refCount);
1838            }
1839            audio_io_handle_t duplicatedOutput = mOutputs.keyAt(i);
1840            ALOGV("closeOutput() closing also duplicated output %d", duplicatedOutput);
1841
1842            mpClientInterface->closeOutput(duplicatedOutput);
1843            delete mOutputs.valueFor(duplicatedOutput);
1844            mOutputs.removeItem(duplicatedOutput);
1845        }
1846    }
1847
1848    AudioParameter param;
1849    param.add(String8("closing"), String8("true"));
1850    mpClientInterface->setParameters(output, param.toString());
1851
1852    mpClientInterface->closeOutput(output);
1853    delete outputDesc;
1854    mOutputs.removeItem(output);
1855    mPreviousOutputs = mOutputs;
1856}
1857
1858SortedVector<audio_io_handle_t> AudioPolicyManagerBase::getOutputsForDevice(audio_devices_t device,
1859                        DefaultKeyedVector<audio_io_handle_t, AudioOutputDescriptor *> openOutputs)
1860{
1861    SortedVector<audio_io_handle_t> outputs;
1862
1863    ALOGVV("getOutputsForDevice() device %04x", device);
1864    for (size_t i = 0; i < openOutputs.size(); i++) {
1865        ALOGVV("output %d isDuplicated=%d device=%04x",
1866                i, openOutputs.valueAt(i)->isDuplicated(), openOutputs.valueAt(i)->supportedDevices());
1867        if ((device & openOutputs.valueAt(i)->supportedDevices()) == device) {
1868            ALOGVV("getOutputsForDevice() found output %d", openOutputs.keyAt(i));
1869            outputs.add(openOutputs.keyAt(i));
1870        }
1871    }
1872    return outputs;
1873}
1874
1875bool AudioPolicyManagerBase::vectorsEqual(SortedVector<audio_io_handle_t>& outputs1,
1876                                   SortedVector<audio_io_handle_t>& outputs2)
1877{
1878    if (outputs1.size() != outputs2.size()) {
1879        return false;
1880    }
1881    for (size_t i = 0; i < outputs1.size(); i++) {
1882        if (outputs1[i] != outputs2[i]) {
1883            return false;
1884        }
1885    }
1886    return true;
1887}
1888
1889void AudioPolicyManagerBase::checkOutputForStrategy(routing_strategy strategy)
1890{
1891    audio_devices_t oldDevice = getDeviceForStrategy(strategy, true /*fromCache*/);
1892    audio_devices_t newDevice = getDeviceForStrategy(strategy, false /*fromCache*/);
1893    SortedVector<audio_io_handle_t> srcOutputs = getOutputsForDevice(oldDevice, mPreviousOutputs);
1894    SortedVector<audio_io_handle_t> dstOutputs = getOutputsForDevice(newDevice, mOutputs);
1895
1896    if (!vectorsEqual(srcOutputs,dstOutputs)) {
1897        ALOGV("checkOutputForStrategy() strategy %d, moving from output %d to output %d",
1898              strategy, srcOutputs[0], dstOutputs[0]);
1899        // mute strategy while moving tracks from one output to another
1900        for (size_t i = 0; i < srcOutputs.size(); i++) {
1901            AudioOutputDescriptor *desc = mOutputs.valueFor(srcOutputs[i]);
1902            if (desc->isStrategyActive(strategy)) {
1903                setStrategyMute(strategy, true, srcOutputs[i]);
1904                setStrategyMute(strategy, false, srcOutputs[i], MUTE_TIME_MS, newDevice);
1905            }
1906        }
1907
1908        // Move effects associated to this strategy from previous output to new output
1909        if (strategy == STRATEGY_MEDIA) {
1910            int outIdx = 0;
1911            for (size_t i = 0; i < dstOutputs.size(); i++) {
1912                AudioOutputDescriptor *desc = mOutputs.valueFor(dstOutputs[i]);
1913                if (desc->mFlags & AUDIO_OUTPUT_FLAG_DEEP_BUFFER) {
1914                    outIdx = i;
1915                }
1916            }
1917            SortedVector<audio_io_handle_t> moved;
1918            for (size_t i = 0; i < mEffects.size(); i++) {
1919                EffectDescriptor *desc = mEffects.valueAt(i);
1920                if (desc->mSession == AUDIO_SESSION_OUTPUT_MIX &&
1921                        desc->mIo != dstOutputs[outIdx]) {
1922                    if (moved.indexOf(desc->mIo) < 0) {
1923                        ALOGV("checkOutputForStrategy() moving effect %d to output %d",
1924                              mEffects.keyAt(i), dstOutputs[outIdx]);
1925                        mpClientInterface->moveEffects(AUDIO_SESSION_OUTPUT_MIX, desc->mIo,
1926                                                       dstOutputs[outIdx]);
1927                        moved.add(desc->mIo);
1928                    }
1929                    desc->mIo = dstOutputs[outIdx];
1930                }
1931            }
1932        }
1933        // Move tracks associated to this strategy from previous output to new output
1934        for (int i = 0; i < (int)AudioSystem::NUM_STREAM_TYPES; i++) {
1935            if (getStrategy((AudioSystem::stream_type)i) == strategy) {
1936                //FIXME see fixme on name change
1937                mpClientInterface->setStreamOutput((AudioSystem::stream_type)i,
1938                                                   dstOutputs[0] /* ignored */);
1939            }
1940        }
1941    }
1942}
1943
1944void AudioPolicyManagerBase::checkOutputForAllStrategies()
1945{
1946    checkOutputForStrategy(STRATEGY_ENFORCED_AUDIBLE);
1947    checkOutputForStrategy(STRATEGY_PHONE);
1948    checkOutputForStrategy(STRATEGY_SONIFICATION);
1949    checkOutputForStrategy(STRATEGY_SONIFICATION_RESPECTFUL);
1950    checkOutputForStrategy(STRATEGY_MEDIA);
1951    checkOutputForStrategy(STRATEGY_DTMF);
1952}
1953
1954audio_io_handle_t AudioPolicyManagerBase::getA2dpOutput()
1955{
1956    if (!mHasA2dp) {
1957        return 0;
1958    }
1959
1960    for (size_t i = 0; i < mOutputs.size(); i++) {
1961        AudioOutputDescriptor *outputDesc = mOutputs.valueAt(i);
1962        if (!outputDesc->isDuplicated() && outputDesc->device() & AUDIO_DEVICE_OUT_ALL_A2DP) {
1963            return mOutputs.keyAt(i);
1964        }
1965    }
1966
1967    return 0;
1968}
1969
1970void AudioPolicyManagerBase::checkA2dpSuspend()
1971{
1972    if (!mHasA2dp) {
1973        return;
1974    }
1975    audio_io_handle_t a2dpOutput = getA2dpOutput();
1976    if (a2dpOutput == 0) {
1977        return;
1978    }
1979
1980    // suspend A2DP output if:
1981    //      (NOT already suspended) &&
1982    //      ((SCO device is connected &&
1983    //       (forced usage for communication || for record is SCO))) ||
1984    //      (phone state is ringing || in call)
1985    //
1986    // restore A2DP output if:
1987    //      (Already suspended) &&
1988    //      ((SCO device is NOT connected ||
1989    //       (forced usage NOT for communication && NOT for record is SCO))) &&
1990    //      (phone state is NOT ringing && NOT in call)
1991    //
1992    if (mA2dpSuspended) {
1993        if (((mScoDeviceAddress == "") ||
1994             ((mForceUse[AudioSystem::FOR_COMMUNICATION] != AudioSystem::FORCE_BT_SCO) &&
1995              (mForceUse[AudioSystem::FOR_RECORD] != AudioSystem::FORCE_BT_SCO))) &&
1996             ((mPhoneState != AudioSystem::MODE_IN_CALL) &&
1997              (mPhoneState != AudioSystem::MODE_RINGTONE))) {
1998
1999            mpClientInterface->restoreOutput(a2dpOutput);
2000            mA2dpSuspended = false;
2001        }
2002    } else {
2003        if (((mScoDeviceAddress != "") &&
2004             ((mForceUse[AudioSystem::FOR_COMMUNICATION] == AudioSystem::FORCE_BT_SCO) ||
2005              (mForceUse[AudioSystem::FOR_RECORD] == AudioSystem::FORCE_BT_SCO))) ||
2006             ((mPhoneState == AudioSystem::MODE_IN_CALL) ||
2007              (mPhoneState == AudioSystem::MODE_RINGTONE))) {
2008
2009            mpClientInterface->suspendOutput(a2dpOutput);
2010            mA2dpSuspended = true;
2011        }
2012    }
2013}
2014
2015audio_devices_t AudioPolicyManagerBase::getNewDevice(audio_io_handle_t output, bool fromCache)
2016{
2017    audio_devices_t device = AUDIO_DEVICE_NONE;
2018
2019    AudioOutputDescriptor *outputDesc = mOutputs.valueFor(output);
2020    // check the following by order of priority to request a routing change if necessary:
2021    // 1: the strategy enforced audible is active on the output:
2022    //      use device for strategy enforced audible
2023    // 2: we are in call or the strategy phone is active on the output:
2024    //      use device for strategy phone
2025    // 3: the strategy sonification is active on the output:
2026    //      use device for strategy sonification
2027    // 4: the strategy "respectful" sonification is active on the output:
2028    //      use device for strategy "respectful" sonification
2029    // 5: the strategy media is active on the output:
2030    //      use device for strategy media
2031    // 6: the strategy DTMF is active on the output:
2032    //      use device for strategy DTMF
2033    if (outputDesc->isStrategyActive(STRATEGY_ENFORCED_AUDIBLE)) {
2034        device = getDeviceForStrategy(STRATEGY_ENFORCED_AUDIBLE, fromCache);
2035    } else if (isInCall() ||
2036                    outputDesc->isStrategyActive(STRATEGY_PHONE)) {
2037        device = getDeviceForStrategy(STRATEGY_PHONE, fromCache);
2038    } else if (outputDesc->isStrategyActive(STRATEGY_SONIFICATION)) {
2039        device = getDeviceForStrategy(STRATEGY_SONIFICATION, fromCache);
2040    } else if (outputDesc->isStrategyActive(STRATEGY_SONIFICATION_RESPECTFUL)) {
2041        device = getDeviceForStrategy(STRATEGY_SONIFICATION_RESPECTFUL, fromCache);
2042    } else if (outputDesc->isStrategyActive(STRATEGY_MEDIA)) {
2043        device = getDeviceForStrategy(STRATEGY_MEDIA, fromCache);
2044    } else if (outputDesc->isStrategyActive(STRATEGY_DTMF)) {
2045        device = getDeviceForStrategy(STRATEGY_DTMF, fromCache);
2046    }
2047
2048    ALOGV("getNewDevice() selected device %x", device);
2049    return device;
2050}
2051
2052uint32_t AudioPolicyManagerBase::getStrategyForStream(AudioSystem::stream_type stream) {
2053    return (uint32_t)getStrategy(stream);
2054}
2055
2056audio_devices_t AudioPolicyManagerBase::getDevicesForStream(AudioSystem::stream_type stream) {
2057    audio_devices_t devices;
2058    // By checking the range of stream before calling getStrategy, we avoid
2059    // getStrategy's behavior for invalid streams.  getStrategy would do a ALOGE
2060    // and then return STRATEGY_MEDIA, but we want to return the empty set.
2061    if (stream < (AudioSystem::stream_type) 0 || stream >= AudioSystem::NUM_STREAM_TYPES) {
2062        devices = AUDIO_DEVICE_NONE;
2063    } else {
2064        AudioPolicyManagerBase::routing_strategy strategy = getStrategy(stream);
2065        devices = getDeviceForStrategy(strategy, true /*fromCache*/);
2066    }
2067    return devices;
2068}
2069
2070AudioPolicyManagerBase::routing_strategy AudioPolicyManagerBase::getStrategy(
2071        AudioSystem::stream_type stream) {
2072    // stream to strategy mapping
2073    switch (stream) {
2074    case AudioSystem::VOICE_CALL:
2075    case AudioSystem::BLUETOOTH_SCO:
2076        return STRATEGY_PHONE;
2077    case AudioSystem::RING:
2078    case AudioSystem::ALARM:
2079        return STRATEGY_SONIFICATION;
2080    case AudioSystem::NOTIFICATION:
2081        return STRATEGY_SONIFICATION_RESPECTFUL;
2082    case AudioSystem::DTMF:
2083        return STRATEGY_DTMF;
2084    default:
2085        ALOGE("unknown stream type");
2086    case AudioSystem::SYSTEM:
2087        // NOTE: SYSTEM stream uses MEDIA strategy because muting music and switching outputs
2088        // while key clicks are played produces a poor result
2089    case AudioSystem::TTS:
2090    case AudioSystem::MUSIC:
2091        return STRATEGY_MEDIA;
2092    case AudioSystem::ENFORCED_AUDIBLE:
2093        return STRATEGY_ENFORCED_AUDIBLE;
2094    }
2095}
2096
2097void AudioPolicyManagerBase::handleNotificationRoutingForStream(AudioSystem::stream_type stream) {
2098    switch(stream) {
2099    case AudioSystem::MUSIC:
2100        checkOutputForStrategy(STRATEGY_SONIFICATION_RESPECTFUL);
2101        updateDevicesAndOutputs();
2102        break;
2103    default:
2104        break;
2105    }
2106}
2107
2108audio_devices_t AudioPolicyManagerBase::getDeviceForStrategy(routing_strategy strategy,
2109                                                             bool fromCache)
2110{
2111    uint32_t device = AUDIO_DEVICE_NONE;
2112
2113    if (fromCache) {
2114        ALOGVV("getDeviceForStrategy() from cache strategy %d, device %x",
2115              strategy, mDeviceForStrategy[strategy]);
2116        return mDeviceForStrategy[strategy];
2117    }
2118
2119    switch (strategy) {
2120
2121    case STRATEGY_SONIFICATION_RESPECTFUL:
2122        if (isInCall()) {
2123            device = getDeviceForStrategy(STRATEGY_SONIFICATION, false /*fromCache*/);
2124        } else if (isStreamActiveRemotely(AudioSystem::MUSIC,
2125                SONIFICATION_RESPECTFUL_AFTER_MUSIC_DELAY)) {
2126            // while media is playing on a remote device, use the the sonification behavior.
2127            // Note that we test this usecase before testing if media is playing because
2128            //   the isStreamActive() method only informs about the activity of a stream, not
2129            //   if it's for local playback. Note also that we use the same delay between both tests
2130            device = getDeviceForStrategy(STRATEGY_SONIFICATION, false /*fromCache*/);
2131        } else if (isStreamActive(AudioSystem::MUSIC, SONIFICATION_RESPECTFUL_AFTER_MUSIC_DELAY)) {
2132            // while media is playing (or has recently played), use the same device
2133            device = getDeviceForStrategy(STRATEGY_MEDIA, false /*fromCache*/);
2134        } else {
2135            // when media is not playing anymore, fall back on the sonification behavior
2136            device = getDeviceForStrategy(STRATEGY_SONIFICATION, false /*fromCache*/);
2137        }
2138
2139        break;
2140
2141    case STRATEGY_DTMF:
2142        if (!isInCall()) {
2143            // when off call, DTMF strategy follows the same rules as MEDIA strategy
2144            device = getDeviceForStrategy(STRATEGY_MEDIA, false /*fromCache*/);
2145            break;
2146        }
2147        // when in call, DTMF and PHONE strategies follow the same rules
2148        // FALL THROUGH
2149
2150    case STRATEGY_PHONE:
2151        // for phone strategy, we first consider the forced use and then the available devices by order
2152        // of priority
2153        switch (mForceUse[AudioSystem::FOR_COMMUNICATION]) {
2154        case AudioSystem::FORCE_BT_SCO:
2155            if (!isInCall() || strategy != STRATEGY_DTMF) {
2156                device = mAvailableOutputDevices & AUDIO_DEVICE_OUT_BLUETOOTH_SCO_CARKIT;
2157                if (device) break;
2158            }
2159            device = mAvailableOutputDevices & AUDIO_DEVICE_OUT_BLUETOOTH_SCO_HEADSET;
2160            if (device) break;
2161            device = mAvailableOutputDevices & AUDIO_DEVICE_OUT_BLUETOOTH_SCO;
2162            if (device) break;
2163            // if SCO device is requested but no SCO device is available, fall back to default case
2164            // FALL THROUGH
2165
2166        default:    // FORCE_NONE
2167            // when not in a phone call, phone strategy should route STREAM_VOICE_CALL to A2DP
2168            if (mHasA2dp && !isInCall() &&
2169                    (mForceUse[AudioSystem::FOR_MEDIA] != AudioSystem::FORCE_NO_BT_A2DP) &&
2170                    (getA2dpOutput() != 0) && !mA2dpSuspended) {
2171                device = mAvailableOutputDevices & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP;
2172                if (device) break;
2173                device = mAvailableOutputDevices & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES;
2174                if (device) break;
2175            }
2176            device = mAvailableOutputDevices & AUDIO_DEVICE_OUT_WIRED_HEADPHONE;
2177            if (device) break;
2178            device = mAvailableOutputDevices & AUDIO_DEVICE_OUT_WIRED_HEADSET;
2179            if (device) break;
2180            if (mPhoneState != AudioSystem::MODE_IN_CALL) {
2181                device = mAvailableOutputDevices & AUDIO_DEVICE_OUT_USB_ACCESSORY;
2182                if (device) break;
2183                device = mAvailableOutputDevices & AUDIO_DEVICE_OUT_USB_DEVICE;
2184                if (device) break;
2185                device = mAvailableOutputDevices & AUDIO_DEVICE_OUT_DGTL_DOCK_HEADSET;
2186                if (device) break;
2187                device = mAvailableOutputDevices & AUDIO_DEVICE_OUT_AUX_DIGITAL;
2188                if (device) break;
2189                device = mAvailableOutputDevices & AUDIO_DEVICE_OUT_ANLG_DOCK_HEADSET;
2190                if (device) break;
2191            }
2192            device = mAvailableOutputDevices & AUDIO_DEVICE_OUT_EARPIECE;
2193            if (device) break;
2194            device = mDefaultOutputDevice;
2195            if (device == AUDIO_DEVICE_NONE) {
2196                ALOGE("getDeviceForStrategy() no device found for STRATEGY_PHONE");
2197            }
2198            break;
2199
2200        case AudioSystem::FORCE_SPEAKER:
2201            // when not in a phone call, phone strategy should route STREAM_VOICE_CALL to
2202            // A2DP speaker when forcing to speaker output
2203            if (mHasA2dp && !isInCall() &&
2204                    (mForceUse[AudioSystem::FOR_MEDIA] != AudioSystem::FORCE_NO_BT_A2DP) &&
2205                    (getA2dpOutput() != 0) && !mA2dpSuspended) {
2206                device = mAvailableOutputDevices & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_SPEAKER;
2207                if (device) break;
2208            }
2209            if (mPhoneState != AudioSystem::MODE_IN_CALL) {
2210                device = mAvailableOutputDevices & AUDIO_DEVICE_OUT_USB_ACCESSORY;
2211                if (device) break;
2212                device = mAvailableOutputDevices & AUDIO_DEVICE_OUT_USB_DEVICE;
2213                if (device) break;
2214                device = mAvailableOutputDevices & AUDIO_DEVICE_OUT_DGTL_DOCK_HEADSET;
2215                if (device) break;
2216                device = mAvailableOutputDevices & AUDIO_DEVICE_OUT_AUX_DIGITAL;
2217                if (device) break;
2218                device = mAvailableOutputDevices & AUDIO_DEVICE_OUT_ANLG_DOCK_HEADSET;
2219                if (device) break;
2220            }
2221            device = mAvailableOutputDevices & AUDIO_DEVICE_OUT_SPEAKER;
2222            if (device) break;
2223            device = mDefaultOutputDevice;
2224            if (device == AUDIO_DEVICE_NONE) {
2225                ALOGE("getDeviceForStrategy() no device found for STRATEGY_PHONE, FORCE_SPEAKER");
2226            }
2227            break;
2228        }
2229    break;
2230
2231    case STRATEGY_SONIFICATION:
2232
2233        // If incall, just select the STRATEGY_PHONE device: The rest of the behavior is handled by
2234        // handleIncallSonification().
2235        if (isInCall()) {
2236            device = getDeviceForStrategy(STRATEGY_PHONE, false /*fromCache*/);
2237            break;
2238        }
2239        // FALL THROUGH
2240
2241    case STRATEGY_ENFORCED_AUDIBLE:
2242        // strategy STRATEGY_ENFORCED_AUDIBLE uses same routing policy as STRATEGY_SONIFICATION
2243        // except:
2244        //   - when in call where it doesn't default to STRATEGY_PHONE behavior
2245        //   - in countries where not enforced in which case it follows STRATEGY_MEDIA
2246
2247        if ((strategy == STRATEGY_SONIFICATION) ||
2248                (mForceUse[AudioSystem::FOR_SYSTEM] == AudioSystem::FORCE_SYSTEM_ENFORCED)) {
2249            device = mAvailableOutputDevices & AUDIO_DEVICE_OUT_SPEAKER;
2250            if (device == AUDIO_DEVICE_NONE) {
2251                ALOGE("getDeviceForStrategy() speaker device not found for STRATEGY_SONIFICATION");
2252            }
2253        }
2254        // The second device used for sonification is the same as the device used by media strategy
2255        // FALL THROUGH
2256
2257    case STRATEGY_MEDIA: {
2258        uint32_t device2 = AUDIO_DEVICE_NONE;
2259        if (strategy != STRATEGY_SONIFICATION) {
2260            // no sonification on remote submix (e.g. WFD)
2261            device2 = mAvailableOutputDevices & AUDIO_DEVICE_OUT_REMOTE_SUBMIX;
2262        }
2263        if ((device2 == AUDIO_DEVICE_NONE) &&
2264                mHasA2dp && (mForceUse[AudioSystem::FOR_MEDIA] != AudioSystem::FORCE_NO_BT_A2DP) &&
2265                (getA2dpOutput() != 0) && !mA2dpSuspended) {
2266            device2 = mAvailableOutputDevices & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP;
2267            if (device2 == AUDIO_DEVICE_NONE) {
2268                device2 = mAvailableOutputDevices & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES;
2269            }
2270            if (device2 == AUDIO_DEVICE_NONE) {
2271                device2 = mAvailableOutputDevices & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_SPEAKER;
2272            }
2273        }
2274        if (device2 == AUDIO_DEVICE_NONE) {
2275            device2 = mAvailableOutputDevices & AUDIO_DEVICE_OUT_WIRED_HEADPHONE;
2276        }
2277        if (device2 == AUDIO_DEVICE_NONE) {
2278            device2 = mAvailableOutputDevices & AUDIO_DEVICE_OUT_WIRED_HEADSET;
2279        }
2280        if (device2 == AUDIO_DEVICE_NONE) {
2281            device2 = mAvailableOutputDevices & AUDIO_DEVICE_OUT_USB_ACCESSORY;
2282        }
2283        if (device2 == AUDIO_DEVICE_NONE) {
2284            device2 = mAvailableOutputDevices & AUDIO_DEVICE_OUT_USB_DEVICE;
2285        }
2286        if (device2 == AUDIO_DEVICE_NONE) {
2287            device2 = mAvailableOutputDevices & AUDIO_DEVICE_OUT_DGTL_DOCK_HEADSET;
2288        }
2289        if ((device2 == AUDIO_DEVICE_NONE) && (strategy != STRATEGY_SONIFICATION)) {
2290            // no sonification on aux digital (e.g. HDMI)
2291            device2 = mAvailableOutputDevices & AUDIO_DEVICE_OUT_AUX_DIGITAL;
2292        }
2293        if ((device2 == AUDIO_DEVICE_NONE) &&
2294                (mForceUse[AudioSystem::FOR_DOCK] == AudioSystem::FORCE_ANALOG_DOCK)) {
2295            device2 = mAvailableOutputDevices & AUDIO_DEVICE_OUT_ANLG_DOCK_HEADSET;
2296        }
2297        if (device2 == AUDIO_DEVICE_NONE) {
2298            device2 = mAvailableOutputDevices & AUDIO_DEVICE_OUT_SPEAKER;
2299        }
2300
2301        // device is DEVICE_OUT_SPEAKER if we come from case STRATEGY_SONIFICATION or
2302        // STRATEGY_ENFORCED_AUDIBLE, AUDIO_DEVICE_NONE otherwise
2303        device |= device2;
2304        if (device) break;
2305        device = mDefaultOutputDevice;
2306        if (device == AUDIO_DEVICE_NONE) {
2307            ALOGE("getDeviceForStrategy() no device found for STRATEGY_MEDIA");
2308        }
2309        } break;
2310
2311    default:
2312        ALOGW("getDeviceForStrategy() unknown strategy: %d", strategy);
2313        break;
2314    }
2315
2316    ALOGVV("getDeviceForStrategy() strategy %d, device %x", strategy, device);
2317    return device;
2318}
2319
2320void AudioPolicyManagerBase::updateDevicesAndOutputs()
2321{
2322    for (int i = 0; i < NUM_STRATEGIES; i++) {
2323        mDeviceForStrategy[i] = getDeviceForStrategy((routing_strategy)i, false /*fromCache*/);
2324    }
2325    mPreviousOutputs = mOutputs;
2326}
2327
2328uint32_t AudioPolicyManagerBase::checkDeviceMuteStrategies(AudioOutputDescriptor *outputDesc,
2329                                                       audio_devices_t prevDevice,
2330                                                       uint32_t delayMs)
2331{
2332    // mute/unmute strategies using an incompatible device combination
2333    // if muting, wait for the audio in pcm buffer to be drained before proceeding
2334    // if unmuting, unmute only after the specified delay
2335    if (outputDesc->isDuplicated()) {
2336        return 0;
2337    }
2338
2339    uint32_t muteWaitMs = 0;
2340    audio_devices_t device = outputDesc->device();
2341    bool shouldMute = outputDesc->isActive() && (AudioSystem::popCount(device) >= 2);
2342    // temporary mute output if device selection changes to avoid volume bursts due to
2343    // different per device volumes
2344    bool tempMute = outputDesc->isActive() && (device != prevDevice);
2345
2346    for (size_t i = 0; i < NUM_STRATEGIES; i++) {
2347        audio_devices_t curDevice = getDeviceForStrategy((routing_strategy)i, false /*fromCache*/);
2348        bool mute = shouldMute && (curDevice & device) && (curDevice != device);
2349        bool doMute = false;
2350
2351        if (mute && !outputDesc->mStrategyMutedByDevice[i]) {
2352            doMute = true;
2353            outputDesc->mStrategyMutedByDevice[i] = true;
2354        } else if (!mute && outputDesc->mStrategyMutedByDevice[i]){
2355            doMute = true;
2356            outputDesc->mStrategyMutedByDevice[i] = false;
2357        }
2358        if (doMute || tempMute) {
2359            for (size_t j = 0; j < mOutputs.size(); j++) {
2360                AudioOutputDescriptor *desc = mOutputs.valueAt(j);
2361                // skip output if it does not share any device with current output
2362                if ((desc->supportedDevices() & outputDesc->supportedDevices())
2363                        == AUDIO_DEVICE_NONE) {
2364                    continue;
2365                }
2366                audio_io_handle_t curOutput = mOutputs.keyAt(j);
2367                ALOGVV("checkDeviceMuteStrategies() %s strategy %d (curDevice %04x) on output %d",
2368                      mute ? "muting" : "unmuting", i, curDevice, curOutput);
2369                setStrategyMute((routing_strategy)i, mute, curOutput, mute ? 0 : delayMs);
2370                if (desc->isStrategyActive((routing_strategy)i)) {
2371                    // do tempMute only for current output
2372                    if (tempMute && (desc == outputDesc)) {
2373                        setStrategyMute((routing_strategy)i, true, curOutput);
2374                        setStrategyMute((routing_strategy)i, false, curOutput,
2375                                            desc->latency() * 2, device);
2376                    }
2377                    if ((tempMute && (desc == outputDesc)) || mute) {
2378                        if (muteWaitMs < desc->latency()) {
2379                            muteWaitMs = desc->latency();
2380                        }
2381                    }
2382                }
2383            }
2384        }
2385    }
2386
2387    // FIXME: should not need to double latency if volume could be applied immediately by the
2388    // audioflinger mixer. We must account for the delay between now and the next time
2389    // the audioflinger thread for this output will process a buffer (which corresponds to
2390    // one buffer size, usually 1/2 or 1/4 of the latency).
2391    muteWaitMs *= 2;
2392    // wait for the PCM output buffers to empty before proceeding with the rest of the command
2393    if (muteWaitMs > delayMs) {
2394        muteWaitMs -= delayMs;
2395        usleep(muteWaitMs * 1000);
2396        return muteWaitMs;
2397    }
2398    return 0;
2399}
2400
2401uint32_t AudioPolicyManagerBase::setOutputDevice(audio_io_handle_t output,
2402                                             audio_devices_t device,
2403                                             bool force,
2404                                             int delayMs)
2405{
2406    ALOGV("setOutputDevice() output %d device %04x delayMs %d", output, device, delayMs);
2407    AudioOutputDescriptor *outputDesc = mOutputs.valueFor(output);
2408    AudioParameter param;
2409    uint32_t muteWaitMs;
2410
2411    if (outputDesc->isDuplicated()) {
2412        muteWaitMs = setOutputDevice(outputDesc->mOutput1->mId, device, force, delayMs);
2413        muteWaitMs += setOutputDevice(outputDesc->mOutput2->mId, device, force, delayMs);
2414        return muteWaitMs;
2415    }
2416    // no need to proceed if new device is not AUDIO_DEVICE_NONE and not supported by current
2417    // output profile
2418    if ((device != AUDIO_DEVICE_NONE) &&
2419            ((device & outputDesc->mProfile->mSupportedDevices) == 0)) {
2420        return 0;
2421    }
2422
2423    // filter devices according to output selected
2424    device = (audio_devices_t)(device & outputDesc->mProfile->mSupportedDevices);
2425
2426    audio_devices_t prevDevice = outputDesc->mDevice;
2427
2428    ALOGV("setOutputDevice() prevDevice %04x", prevDevice);
2429
2430    if (device != AUDIO_DEVICE_NONE) {
2431        outputDesc->mDevice = device;
2432    }
2433    muteWaitMs = checkDeviceMuteStrategies(outputDesc, prevDevice, delayMs);
2434
2435    // Do not change the routing if:
2436    //  - the requested device is AUDIO_DEVICE_NONE
2437    //  - the requested device is the same as current device and force is not specified.
2438    // Doing this check here allows the caller to call setOutputDevice() without conditions
2439    if ((device == AUDIO_DEVICE_NONE || device == prevDevice) && !force) {
2440        ALOGV("setOutputDevice() setting same device %04x or null device for output %d", device, output);
2441        return muteWaitMs;
2442    }
2443
2444    ALOGV("setOutputDevice() changing device");
2445    // do the routing
2446    param.addInt(String8(AudioParameter::keyRouting), (int)device);
2447    mpClientInterface->setParameters(output, param.toString(), delayMs);
2448
2449    // update stream volumes according to new device
2450    applyStreamVolumes(output, device, delayMs);
2451
2452    return muteWaitMs;
2453}
2454
2455AudioPolicyManagerBase::IOProfile *AudioPolicyManagerBase::getInputProfile(audio_devices_t device,
2456                                                   uint32_t samplingRate,
2457                                                   uint32_t format,
2458                                                   uint32_t channelMask)
2459{
2460    // Choose an input profile based on the requested capture parameters: select the first available
2461    // profile supporting all requested parameters.
2462
2463    for (size_t i = 0; i < mHwModules.size(); i++)
2464    {
2465        if (mHwModules[i]->mHandle == 0) {
2466            continue;
2467        }
2468        for (size_t j = 0; j < mHwModules[i]->mInputProfiles.size(); j++)
2469        {
2470            IOProfile *profile = mHwModules[i]->mInputProfiles[j];
2471            if (profile->isCompatibleProfile(device, samplingRate, format,
2472                                             channelMask,(audio_output_flags_t)0)) {
2473                return profile;
2474            }
2475        }
2476    }
2477    return NULL;
2478}
2479
2480audio_devices_t AudioPolicyManagerBase::getDeviceForInputSource(int inputSource)
2481{
2482    uint32_t device = AUDIO_DEVICE_NONE;
2483
2484    switch (inputSource) {
2485    case AUDIO_SOURCE_VOICE_UPLINK:
2486      if (mAvailableInputDevices & AUDIO_DEVICE_IN_VOICE_CALL) {
2487          device = AUDIO_DEVICE_IN_VOICE_CALL;
2488          break;
2489      }
2490      // FALL THROUGH
2491
2492    case AUDIO_SOURCE_DEFAULT:
2493    case AUDIO_SOURCE_MIC:
2494    case AUDIO_SOURCE_VOICE_RECOGNITION:
2495    case AUDIO_SOURCE_VOICE_COMMUNICATION:
2496        if (mForceUse[AudioSystem::FOR_RECORD] == AudioSystem::FORCE_BT_SCO &&
2497            mAvailableInputDevices & AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET) {
2498            device = AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET;
2499        } else if (mAvailableInputDevices & AUDIO_DEVICE_IN_WIRED_HEADSET) {
2500            device = AUDIO_DEVICE_IN_WIRED_HEADSET;
2501        } else if (mAvailableInputDevices & AUDIO_DEVICE_IN_BUILTIN_MIC) {
2502            device = AUDIO_DEVICE_IN_BUILTIN_MIC;
2503        }
2504        break;
2505    case AUDIO_SOURCE_CAMCORDER:
2506        if (mAvailableInputDevices & AUDIO_DEVICE_IN_BACK_MIC) {
2507            device = AUDIO_DEVICE_IN_BACK_MIC;
2508        } else if (mAvailableInputDevices & AUDIO_DEVICE_IN_BUILTIN_MIC) {
2509            device = AUDIO_DEVICE_IN_BUILTIN_MIC;
2510        }
2511        break;
2512    case AUDIO_SOURCE_VOICE_DOWNLINK:
2513    case AUDIO_SOURCE_VOICE_CALL:
2514        if (mAvailableInputDevices & AUDIO_DEVICE_IN_VOICE_CALL) {
2515            device = AUDIO_DEVICE_IN_VOICE_CALL;
2516        }
2517        break;
2518    case AUDIO_SOURCE_REMOTE_SUBMIX:
2519        if (mAvailableInputDevices & AUDIO_DEVICE_IN_REMOTE_SUBMIX) {
2520            device = AUDIO_DEVICE_IN_REMOTE_SUBMIX;
2521        }
2522        break;
2523    default:
2524        ALOGW("getDeviceForInputSource() invalid input source %d", inputSource);
2525        break;
2526    }
2527    ALOGV("getDeviceForInputSource()input source %d, device %08x", inputSource, device);
2528    return device;
2529}
2530
2531bool AudioPolicyManagerBase::isVirtualInputDevice(audio_devices_t device)
2532{
2533    if ((device & AUDIO_DEVICE_BIT_IN) != 0) {
2534        device &= ~AUDIO_DEVICE_BIT_IN;
2535        if ((popcount(device) == 1) && ((device & ~APM_AUDIO_IN_DEVICE_VIRTUAL_ALL) == 0))
2536            return true;
2537    }
2538    return false;
2539}
2540
2541audio_io_handle_t AudioPolicyManagerBase::getActiveInput(bool ignoreVirtualInputs)
2542{
2543    for (size_t i = 0; i < mInputs.size(); i++) {
2544        const AudioInputDescriptor * input_descriptor = mInputs.valueAt(i);
2545        if ((input_descriptor->mRefCount > 0)
2546                && (!ignoreVirtualInputs || !isVirtualInputDevice(input_descriptor->mDevice))) {
2547            return mInputs.keyAt(i);
2548        }
2549    }
2550    return 0;
2551}
2552
2553
2554audio_devices_t AudioPolicyManagerBase::getDeviceForVolume(audio_devices_t device)
2555{
2556    if (device == AUDIO_DEVICE_NONE) {
2557        // this happens when forcing a route update and no track is active on an output.
2558        // In this case the returned category is not important.
2559        device =  AUDIO_DEVICE_OUT_SPEAKER;
2560    } else if (AudioSystem::popCount(device) > 1) {
2561        // Multiple device selection is either:
2562        //  - speaker + one other device: give priority to speaker in this case.
2563        //  - one A2DP device + another device: happens with duplicated output. In this case
2564        // retain the device on the A2DP output as the other must not correspond to an active
2565        // selection if not the speaker.
2566        if (device & AUDIO_DEVICE_OUT_SPEAKER) {
2567            device = AUDIO_DEVICE_OUT_SPEAKER;
2568        } else {
2569            device = (audio_devices_t)(device & AUDIO_DEVICE_OUT_ALL_A2DP);
2570        }
2571    }
2572
2573    ALOGW_IF(AudioSystem::popCount(device) != 1,
2574            "getDeviceForVolume() invalid device combination: %08x",
2575            device);
2576
2577    return device;
2578}
2579
2580AudioPolicyManagerBase::device_category AudioPolicyManagerBase::getDeviceCategory(audio_devices_t device)
2581{
2582    switch(getDeviceForVolume(device)) {
2583        case AUDIO_DEVICE_OUT_EARPIECE:
2584            return DEVICE_CATEGORY_EARPIECE;
2585        case AUDIO_DEVICE_OUT_WIRED_HEADSET:
2586        case AUDIO_DEVICE_OUT_WIRED_HEADPHONE:
2587        case AUDIO_DEVICE_OUT_BLUETOOTH_SCO:
2588        case AUDIO_DEVICE_OUT_BLUETOOTH_SCO_HEADSET:
2589        case AUDIO_DEVICE_OUT_BLUETOOTH_A2DP:
2590        case AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES:
2591            return DEVICE_CATEGORY_HEADSET;
2592        case AUDIO_DEVICE_OUT_SPEAKER:
2593        case AUDIO_DEVICE_OUT_BLUETOOTH_SCO_CARKIT:
2594        case AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_SPEAKER:
2595        case AUDIO_DEVICE_OUT_AUX_DIGITAL:
2596        case AUDIO_DEVICE_OUT_USB_ACCESSORY:
2597        case AUDIO_DEVICE_OUT_USB_DEVICE:
2598        case AUDIO_DEVICE_OUT_REMOTE_SUBMIX:
2599        default:
2600            return DEVICE_CATEGORY_SPEAKER;
2601    }
2602}
2603
2604float AudioPolicyManagerBase::volIndexToAmpl(audio_devices_t device, const StreamDescriptor& streamDesc,
2605        int indexInUi)
2606{
2607    device_category deviceCategory = getDeviceCategory(device);
2608    const VolumeCurvePoint *curve = streamDesc.mVolumeCurve[deviceCategory];
2609
2610    // the volume index in the UI is relative to the min and max volume indices for this stream type
2611    int nbSteps = 1 + curve[VOLMAX].mIndex -
2612            curve[VOLMIN].mIndex;
2613    int volIdx = (nbSteps * (indexInUi - streamDesc.mIndexMin)) /
2614            (streamDesc.mIndexMax - streamDesc.mIndexMin);
2615
2616    // find what part of the curve this index volume belongs to, or if it's out of bounds
2617    int segment = 0;
2618    if (volIdx < curve[VOLMIN].mIndex) {         // out of bounds
2619        return 0.0f;
2620    } else if (volIdx < curve[VOLKNEE1].mIndex) {
2621        segment = 0;
2622    } else if (volIdx < curve[VOLKNEE2].mIndex) {
2623        segment = 1;
2624    } else if (volIdx <= curve[VOLMAX].mIndex) {
2625        segment = 2;
2626    } else {                                                               // out of bounds
2627        return 1.0f;
2628    }
2629
2630    // linear interpolation in the attenuation table in dB
2631    float decibels = curve[segment].mDBAttenuation +
2632            ((float)(volIdx - curve[segment].mIndex)) *
2633                ( (curve[segment+1].mDBAttenuation -
2634                        curve[segment].mDBAttenuation) /
2635                    ((float)(curve[segment+1].mIndex -
2636                            curve[segment].mIndex)) );
2637
2638    float amplification = exp( decibels * 0.115129f); // exp( dB * ln(10) / 20 )
2639
2640    ALOGVV("VOLUME vol index=[%d %d %d], dB=[%.1f %.1f %.1f] ampl=%.5f",
2641            curve[segment].mIndex, volIdx,
2642            curve[segment+1].mIndex,
2643            curve[segment].mDBAttenuation,
2644            decibels,
2645            curve[segment+1].mDBAttenuation,
2646            amplification);
2647
2648    return amplification;
2649}
2650
2651const AudioPolicyManagerBase::VolumeCurvePoint
2652    AudioPolicyManagerBase::sDefaultVolumeCurve[AudioPolicyManagerBase::VOLCNT] = {
2653    {1, -49.5f}, {33, -33.5f}, {66, -17.0f}, {100, 0.0f}
2654};
2655
2656const AudioPolicyManagerBase::VolumeCurvePoint
2657    AudioPolicyManagerBase::sDefaultMediaVolumeCurve[AudioPolicyManagerBase::VOLCNT] = {
2658    {1, -58.0f}, {20, -40.0f}, {60, -17.0f}, {100, 0.0f}
2659};
2660
2661const AudioPolicyManagerBase::VolumeCurvePoint
2662    AudioPolicyManagerBase::sSpeakerMediaVolumeCurve[AudioPolicyManagerBase::VOLCNT] = {
2663    {1, -56.0f}, {20, -34.0f}, {60, -11.0f}, {100, 0.0f}
2664};
2665
2666const AudioPolicyManagerBase::VolumeCurvePoint
2667    AudioPolicyManagerBase::sSpeakerSonificationVolumeCurve[AudioPolicyManagerBase::VOLCNT] = {
2668    {1, -29.7f}, {33, -20.1f}, {66, -10.2f}, {100, 0.0f}
2669};
2670
2671// AUDIO_STREAM_SYSTEM, AUDIO_STREAM_ENFORCED_AUDIBLE and AUDIO_STREAM_DTMF volume tracks
2672// AUDIO_STREAM_RING on phones and AUDIO_STREAM_MUSIC on tablets (See AudioService.java).
2673// The range is constrained between -24dB and -6dB over speaker and -30dB and -18dB over headset.
2674const AudioPolicyManagerBase::VolumeCurvePoint
2675    AudioPolicyManagerBase::sDefaultSystemVolumeCurve[AudioPolicyManagerBase::VOLCNT] = {
2676    {1, -24.0f}, {33, -18.0f}, {66, -12.0f}, {100, -6.0f}
2677};
2678
2679const AudioPolicyManagerBase::VolumeCurvePoint
2680    AudioPolicyManagerBase::sHeadsetSystemVolumeCurve[AudioPolicyManagerBase::VOLCNT] = {
2681    {1, -30.0f}, {33, -26.0f}, {66, -22.0f}, {100, -18.0f}
2682};
2683
2684const AudioPolicyManagerBase::VolumeCurvePoint
2685    AudioPolicyManagerBase::sDefaultVoiceVolumeCurve[AudioPolicyManagerBase::VOLCNT] = {
2686    {0, -42.0f}, {33, -28.0f}, {66, -14.0f}, {100, 0.0f}
2687};
2688
2689const AudioPolicyManagerBase::VolumeCurvePoint
2690    AudioPolicyManagerBase::sSpeakerVoiceVolumeCurve[AudioPolicyManagerBase::VOLCNT] = {
2691    {0, -24.0f}, {33, -16.0f}, {66, -8.0f}, {100, 0.0f}
2692};
2693
2694const AudioPolicyManagerBase::VolumeCurvePoint
2695            *AudioPolicyManagerBase::sVolumeProfiles[AUDIO_STREAM_CNT]
2696                                                   [AudioPolicyManagerBase::DEVICE_CATEGORY_CNT] = {
2697    { // AUDIO_STREAM_VOICE_CALL
2698        sDefaultVoiceVolumeCurve, // DEVICE_CATEGORY_HEADSET
2699        sSpeakerVoiceVolumeCurve, // DEVICE_CATEGORY_SPEAKER
2700        sDefaultVoiceVolumeCurve  // DEVICE_CATEGORY_EARPIECE
2701    },
2702    { // AUDIO_STREAM_SYSTEM
2703        sHeadsetSystemVolumeCurve, // DEVICE_CATEGORY_HEADSET
2704        sDefaultSystemVolumeCurve, // DEVICE_CATEGORY_SPEAKER
2705        sDefaultSystemVolumeCurve  // DEVICE_CATEGORY_EARPIECE
2706    },
2707    { // AUDIO_STREAM_RING
2708        sDefaultVolumeCurve, // DEVICE_CATEGORY_HEADSET
2709        sSpeakerSonificationVolumeCurve, // DEVICE_CATEGORY_SPEAKER
2710        sDefaultVolumeCurve  // DEVICE_CATEGORY_EARPIECE
2711    },
2712    { // AUDIO_STREAM_MUSIC
2713        sDefaultMediaVolumeCurve, // DEVICE_CATEGORY_HEADSET
2714        sSpeakerMediaVolumeCurve, // DEVICE_CATEGORY_SPEAKER
2715        sDefaultMediaVolumeCurve  // DEVICE_CATEGORY_EARPIECE
2716    },
2717    { // AUDIO_STREAM_ALARM
2718        sDefaultVolumeCurve, // DEVICE_CATEGORY_HEADSET
2719        sSpeakerSonificationVolumeCurve, // DEVICE_CATEGORY_SPEAKER
2720        sDefaultVolumeCurve  // DEVICE_CATEGORY_EARPIECE
2721    },
2722    { // AUDIO_STREAM_NOTIFICATION
2723        sDefaultVolumeCurve, // DEVICE_CATEGORY_HEADSET
2724        sSpeakerSonificationVolumeCurve, // DEVICE_CATEGORY_SPEAKER
2725        sDefaultVolumeCurve  // DEVICE_CATEGORY_EARPIECE
2726    },
2727    { // AUDIO_STREAM_BLUETOOTH_SCO
2728        sDefaultVoiceVolumeCurve, // DEVICE_CATEGORY_HEADSET
2729        sSpeakerVoiceVolumeCurve, // DEVICE_CATEGORY_SPEAKER
2730        sDefaultVoiceVolumeCurve  // DEVICE_CATEGORY_EARPIECE
2731    },
2732    { // AUDIO_STREAM_ENFORCED_AUDIBLE
2733        sHeadsetSystemVolumeCurve, // DEVICE_CATEGORY_HEADSET
2734        sDefaultSystemVolumeCurve, // DEVICE_CATEGORY_SPEAKER
2735        sDefaultSystemVolumeCurve  // DEVICE_CATEGORY_EARPIECE
2736    },
2737    {  // AUDIO_STREAM_DTMF
2738        sHeadsetSystemVolumeCurve, // DEVICE_CATEGORY_HEADSET
2739        sDefaultSystemVolumeCurve, // DEVICE_CATEGORY_SPEAKER
2740        sDefaultSystemVolumeCurve  // DEVICE_CATEGORY_EARPIECE
2741    },
2742    { // AUDIO_STREAM_TTS
2743        sDefaultMediaVolumeCurve, // DEVICE_CATEGORY_HEADSET
2744        sSpeakerMediaVolumeCurve, // DEVICE_CATEGORY_SPEAKER
2745        sDefaultMediaVolumeCurve  // DEVICE_CATEGORY_EARPIECE
2746    },
2747};
2748
2749void AudioPolicyManagerBase::initializeVolumeCurves()
2750{
2751    for (int i = 0; i < AUDIO_STREAM_CNT; i++) {
2752        for (int j = 0; j < DEVICE_CATEGORY_CNT; j++) {
2753            mStreams[i].mVolumeCurve[j] =
2754                    sVolumeProfiles[i][j];
2755        }
2756    }
2757}
2758
2759float AudioPolicyManagerBase::computeVolume(int stream,
2760                                            int index,
2761                                            audio_io_handle_t output,
2762                                            audio_devices_t device)
2763{
2764    float volume = 1.0;
2765    AudioOutputDescriptor *outputDesc = mOutputs.valueFor(output);
2766    StreamDescriptor &streamDesc = mStreams[stream];
2767
2768    if (device == AUDIO_DEVICE_NONE) {
2769        device = outputDesc->device();
2770    }
2771
2772    // if volume is not 0 (not muted), force media volume to max on digital output
2773    if (stream == AudioSystem::MUSIC &&
2774        index != mStreams[stream].mIndexMin &&
2775        (device == AUDIO_DEVICE_OUT_AUX_DIGITAL ||
2776         device == AUDIO_DEVICE_OUT_DGTL_DOCK_HEADSET ||
2777         device == AUDIO_DEVICE_OUT_USB_ACCESSORY ||
2778         device == AUDIO_DEVICE_OUT_USB_DEVICE)) {
2779        return 1.0;
2780    }
2781
2782    volume = volIndexToAmpl(device, streamDesc, index);
2783
2784    // if a headset is connected, apply the following rules to ring tones and notifications
2785    // to avoid sound level bursts in user's ears:
2786    // - always attenuate ring tones and notifications volume by 6dB
2787    // - if music is playing, always limit the volume to current music volume,
2788    // with a minimum threshold at -36dB so that notification is always perceived.
2789    const routing_strategy stream_strategy = getStrategy((AudioSystem::stream_type)stream);
2790    if ((device & (AUDIO_DEVICE_OUT_BLUETOOTH_A2DP |
2791            AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES |
2792            AUDIO_DEVICE_OUT_WIRED_HEADSET |
2793            AUDIO_DEVICE_OUT_WIRED_HEADPHONE)) &&
2794        ((stream_strategy == STRATEGY_SONIFICATION)
2795                || (stream_strategy == STRATEGY_SONIFICATION_RESPECTFUL)
2796                || (stream == AudioSystem::SYSTEM)
2797                || ((stream_strategy == STRATEGY_ENFORCED_AUDIBLE) &&
2798                    (mForceUse[AudioSystem::FOR_SYSTEM] == AudioSystem::FORCE_NONE))) &&
2799        streamDesc.mCanBeMuted) {
2800        volume *= SONIFICATION_HEADSET_VOLUME_FACTOR;
2801        // when the phone is ringing we must consider that music could have been paused just before
2802        // by the music application and behave as if music was active if the last music track was
2803        // just stopped
2804        if (isStreamActive(AudioSystem::MUSIC, SONIFICATION_HEADSET_MUSIC_DELAY) ||
2805                mLimitRingtoneVolume) {
2806            audio_devices_t musicDevice = getDeviceForStrategy(STRATEGY_MEDIA, true /*fromCache*/);
2807            float musicVol = computeVolume(AudioSystem::MUSIC,
2808                               mStreams[AudioSystem::MUSIC].getVolumeIndex(musicDevice),
2809                               output,
2810                               musicDevice);
2811            float minVol = (musicVol > SONIFICATION_HEADSET_VOLUME_MIN) ?
2812                                musicVol : SONIFICATION_HEADSET_VOLUME_MIN;
2813            if (volume > minVol) {
2814                volume = minVol;
2815                ALOGV("computeVolume limiting volume to %f musicVol %f", minVol, musicVol);
2816            }
2817        }
2818    }
2819
2820    return volume;
2821}
2822
2823status_t AudioPolicyManagerBase::checkAndSetVolume(int stream,
2824                                                   int index,
2825                                                   audio_io_handle_t output,
2826                                                   audio_devices_t device,
2827                                                   int delayMs,
2828                                                   bool force)
2829{
2830
2831    // do not change actual stream volume if the stream is muted
2832    if (mOutputs.valueFor(output)->mMuteCount[stream] != 0) {
2833        ALOGVV("checkAndSetVolume() stream %d muted count %d",
2834              stream, mOutputs.valueFor(output)->mMuteCount[stream]);
2835        return NO_ERROR;
2836    }
2837
2838    // do not change in call volume if bluetooth is connected and vice versa
2839    if ((stream == AudioSystem::VOICE_CALL && mForceUse[AudioSystem::FOR_COMMUNICATION] == AudioSystem::FORCE_BT_SCO) ||
2840        (stream == AudioSystem::BLUETOOTH_SCO && mForceUse[AudioSystem::FOR_COMMUNICATION] != AudioSystem::FORCE_BT_SCO)) {
2841        ALOGV("checkAndSetVolume() cannot set stream %d volume with force use = %d for comm",
2842             stream, mForceUse[AudioSystem::FOR_COMMUNICATION]);
2843        return INVALID_OPERATION;
2844    }
2845
2846    float volume = computeVolume(stream, index, output, device);
2847    // We actually change the volume if:
2848    // - the float value returned by computeVolume() changed
2849    // - the force flag is set
2850    if (volume != mOutputs.valueFor(output)->mCurVolume[stream] ||
2851            force) {
2852        mOutputs.valueFor(output)->mCurVolume[stream] = volume;
2853        ALOGVV("checkAndSetVolume() for output %d stream %d, volume %f, delay %d", output, stream, volume, delayMs);
2854        // Force VOICE_CALL to track BLUETOOTH_SCO stream volume when bluetooth audio is
2855        // enabled
2856        if (stream == AudioSystem::BLUETOOTH_SCO) {
2857            mpClientInterface->setStreamVolume(AudioSystem::VOICE_CALL, volume, output, delayMs);
2858        }
2859        mpClientInterface->setStreamVolume((AudioSystem::stream_type)stream, volume, output, delayMs);
2860    }
2861
2862    if (stream == AudioSystem::VOICE_CALL ||
2863        stream == AudioSystem::BLUETOOTH_SCO) {
2864        float voiceVolume;
2865        // Force voice volume to max for bluetooth SCO as volume is managed by the headset
2866        if (stream == AudioSystem::VOICE_CALL) {
2867            voiceVolume = (float)index/(float)mStreams[stream].mIndexMax;
2868        } else {
2869            voiceVolume = 1.0;
2870        }
2871
2872        if (voiceVolume != mLastVoiceVolume && output == mPrimaryOutput) {
2873            mpClientInterface->setVoiceVolume(voiceVolume, delayMs);
2874            mLastVoiceVolume = voiceVolume;
2875        }
2876    }
2877
2878    return NO_ERROR;
2879}
2880
2881void AudioPolicyManagerBase::applyStreamVolumes(audio_io_handle_t output,
2882                                                audio_devices_t device,
2883                                                int delayMs,
2884                                                bool force)
2885{
2886    ALOGVV("applyStreamVolumes() for output %d and device %x", output, device);
2887
2888    for (int stream = 0; stream < AudioSystem::NUM_STREAM_TYPES; stream++) {
2889        checkAndSetVolume(stream,
2890                          mStreams[stream].getVolumeIndex(device),
2891                          output,
2892                          device,
2893                          delayMs,
2894                          force);
2895    }
2896}
2897
2898void AudioPolicyManagerBase::setStrategyMute(routing_strategy strategy,
2899                                             bool on,
2900                                             audio_io_handle_t output,
2901                                             int delayMs,
2902                                             audio_devices_t device)
2903{
2904    ALOGVV("setStrategyMute() strategy %d, mute %d, output %d", strategy, on, output);
2905    for (int stream = 0; stream < AudioSystem::NUM_STREAM_TYPES; stream++) {
2906        if (getStrategy((AudioSystem::stream_type)stream) == strategy) {
2907            setStreamMute(stream, on, output, delayMs, device);
2908        }
2909    }
2910}
2911
2912void AudioPolicyManagerBase::setStreamMute(int stream,
2913                                           bool on,
2914                                           audio_io_handle_t output,
2915                                           int delayMs,
2916                                           audio_devices_t device)
2917{
2918    StreamDescriptor &streamDesc = mStreams[stream];
2919    AudioOutputDescriptor *outputDesc = mOutputs.valueFor(output);
2920    if (device == AUDIO_DEVICE_NONE) {
2921        device = outputDesc->device();
2922    }
2923
2924    ALOGVV("setStreamMute() stream %d, mute %d, output %d, mMuteCount %d device %04x",
2925          stream, on, output, outputDesc->mMuteCount[stream], device);
2926
2927    if (on) {
2928        if (outputDesc->mMuteCount[stream] == 0) {
2929            if (streamDesc.mCanBeMuted &&
2930                    ((stream != AudioSystem::ENFORCED_AUDIBLE) ||
2931                     (mForceUse[AudioSystem::FOR_SYSTEM] == AudioSystem::FORCE_NONE))) {
2932                checkAndSetVolume(stream, 0, output, device, delayMs);
2933            }
2934        }
2935        // increment mMuteCount after calling checkAndSetVolume() so that volume change is not ignored
2936        outputDesc->mMuteCount[stream]++;
2937    } else {
2938        if (outputDesc->mMuteCount[stream] == 0) {
2939            ALOGV("setStreamMute() unmuting non muted stream!");
2940            return;
2941        }
2942        if (--outputDesc->mMuteCount[stream] == 0) {
2943            checkAndSetVolume(stream,
2944                              streamDesc.getVolumeIndex(device),
2945                              output,
2946                              device,
2947                              delayMs);
2948        }
2949    }
2950}
2951
2952void AudioPolicyManagerBase::handleIncallSonification(int stream, bool starting, bool stateChange)
2953{
2954    // if the stream pertains to sonification strategy and we are in call we must
2955    // mute the stream if it is low visibility. If it is high visibility, we must play a tone
2956    // in the device used for phone strategy and play the tone if the selected device does not
2957    // interfere with the device used for phone strategy
2958    // if stateChange is true, we are called from setPhoneState() and we must mute or unmute as
2959    // many times as there are active tracks on the output
2960    const routing_strategy stream_strategy = getStrategy((AudioSystem::stream_type)stream);
2961    if ((stream_strategy == STRATEGY_SONIFICATION) ||
2962            ((stream_strategy == STRATEGY_SONIFICATION_RESPECTFUL))) {
2963        AudioOutputDescriptor *outputDesc = mOutputs.valueFor(mPrimaryOutput);
2964        ALOGV("handleIncallSonification() stream %d starting %d device %x stateChange %d",
2965                stream, starting, outputDesc->mDevice, stateChange);
2966        if (outputDesc->mRefCount[stream]) {
2967            int muteCount = 1;
2968            if (stateChange) {
2969                muteCount = outputDesc->mRefCount[stream];
2970            }
2971            if (AudioSystem::isLowVisibility((AudioSystem::stream_type)stream)) {
2972                ALOGV("handleIncallSonification() low visibility, muteCount %d", muteCount);
2973                for (int i = 0; i < muteCount; i++) {
2974                    setStreamMute(stream, starting, mPrimaryOutput);
2975                }
2976            } else {
2977                ALOGV("handleIncallSonification() high visibility");
2978                if (outputDesc->device() &
2979                        getDeviceForStrategy(STRATEGY_PHONE, true /*fromCache*/)) {
2980                    ALOGV("handleIncallSonification() high visibility muted, muteCount %d", muteCount);
2981                    for (int i = 0; i < muteCount; i++) {
2982                        setStreamMute(stream, starting, mPrimaryOutput);
2983                    }
2984                }
2985                if (starting) {
2986                    mpClientInterface->startTone(ToneGenerator::TONE_SUP_CALL_WAITING, AudioSystem::VOICE_CALL);
2987                } else {
2988                    mpClientInterface->stopTone();
2989                }
2990            }
2991        }
2992    }
2993}
2994
2995bool AudioPolicyManagerBase::isInCall()
2996{
2997    return isStateInCall(mPhoneState);
2998}
2999
3000bool AudioPolicyManagerBase::isStateInCall(int state) {
3001    return ((state == AudioSystem::MODE_IN_CALL) ||
3002            (state == AudioSystem::MODE_IN_COMMUNICATION));
3003}
3004
3005bool AudioPolicyManagerBase::needsDirectOuput(audio_stream_type_t stream,
3006                                              uint32_t samplingRate,
3007                                              audio_format_t format,
3008                                              audio_channel_mask_t channelMask,
3009                                              audio_output_flags_t flags,
3010                                              audio_devices_t device)
3011{
3012   return ((flags & AudioSystem::OUTPUT_FLAG_DIRECT) ||
3013          (format != 0 && !AudioSystem::isLinearPCM(format)));
3014}
3015
3016uint32_t AudioPolicyManagerBase::getMaxEffectsCpuLoad()
3017{
3018    return MAX_EFFECTS_CPU_LOAD;
3019}
3020
3021uint32_t AudioPolicyManagerBase::getMaxEffectsMemory()
3022{
3023    return MAX_EFFECTS_MEMORY;
3024}
3025
3026// --- AudioOutputDescriptor class implementation
3027
3028AudioPolicyManagerBase::AudioOutputDescriptor::AudioOutputDescriptor(
3029        const IOProfile *profile)
3030    : mId(0), mSamplingRate(0), mFormat((audio_format_t)0),
3031      mChannelMask((audio_channel_mask_t)0), mLatency(0),
3032    mFlags((audio_output_flags_t)0), mDevice(AUDIO_DEVICE_NONE),
3033    mOutput1(0), mOutput2(0), mProfile(profile), mDirectOpenCount(0)
3034{
3035    // clear usage count for all stream types
3036    for (int i = 0; i < AudioSystem::NUM_STREAM_TYPES; i++) {
3037        mRefCount[i] = 0;
3038        mCurVolume[i] = -1.0;
3039        mMuteCount[i] = 0;
3040        mStopTime[i] = 0;
3041    }
3042    for (int i = 0; i < NUM_STRATEGIES; i++) {
3043        mStrategyMutedByDevice[i] = false;
3044    }
3045    if (profile != NULL) {
3046        mSamplingRate = profile->mSamplingRates[0];
3047        mFormat = profile->mFormats[0];
3048        mChannelMask = profile->mChannelMasks[0];
3049        mFlags = profile->mFlags;
3050    }
3051}
3052
3053audio_devices_t AudioPolicyManagerBase::AudioOutputDescriptor::device() const
3054{
3055    if (isDuplicated()) {
3056        return (audio_devices_t)(mOutput1->mDevice | mOutput2->mDevice);
3057    } else {
3058        return mDevice;
3059    }
3060}
3061
3062uint32_t AudioPolicyManagerBase::AudioOutputDescriptor::latency()
3063{
3064    if (isDuplicated()) {
3065        return (mOutput1->mLatency > mOutput2->mLatency) ? mOutput1->mLatency : mOutput2->mLatency;
3066    } else {
3067        return mLatency;
3068    }
3069}
3070
3071bool AudioPolicyManagerBase::AudioOutputDescriptor::sharesHwModuleWith(
3072        const AudioOutputDescriptor *outputDesc)
3073{
3074    if (isDuplicated()) {
3075        return mOutput1->sharesHwModuleWith(outputDesc) || mOutput2->sharesHwModuleWith(outputDesc);
3076    } else if (outputDesc->isDuplicated()){
3077        return sharesHwModuleWith(outputDesc->mOutput1) || sharesHwModuleWith(outputDesc->mOutput2);
3078    } else {
3079        return (mProfile->mModule == outputDesc->mProfile->mModule);
3080    }
3081}
3082
3083void AudioPolicyManagerBase::AudioOutputDescriptor::changeRefCount(AudioSystem::stream_type stream, int delta)
3084{
3085    // forward usage count change to attached outputs
3086    if (isDuplicated()) {
3087        mOutput1->changeRefCount(stream, delta);
3088        mOutput2->changeRefCount(stream, delta);
3089    }
3090    if ((delta + (int)mRefCount[stream]) < 0) {
3091        ALOGW("changeRefCount() invalid delta %d for stream %d, refCount %d", delta, stream, mRefCount[stream]);
3092        mRefCount[stream] = 0;
3093        return;
3094    }
3095    mRefCount[stream] += delta;
3096    ALOGV("changeRefCount() stream %d, count %d", stream, mRefCount[stream]);
3097}
3098
3099audio_devices_t AudioPolicyManagerBase::AudioOutputDescriptor::supportedDevices()
3100{
3101    if (isDuplicated()) {
3102        return (audio_devices_t)(mOutput1->supportedDevices() | mOutput2->supportedDevices());
3103    } else {
3104        return mProfile->mSupportedDevices ;
3105    }
3106}
3107
3108bool AudioPolicyManagerBase::AudioOutputDescriptor::isActive(uint32_t inPastMs) const
3109{
3110    return isStrategyActive(NUM_STRATEGIES, inPastMs);
3111}
3112
3113bool AudioPolicyManagerBase::AudioOutputDescriptor::isStrategyActive(routing_strategy strategy,
3114                                                                       uint32_t inPastMs,
3115                                                                       nsecs_t sysTime) const
3116{
3117    if ((sysTime == 0) && (inPastMs != 0)) {
3118        sysTime = systemTime();
3119    }
3120    for (int i = 0; i < AudioSystem::NUM_STREAM_TYPES; i++) {
3121        if (((getStrategy((AudioSystem::stream_type)i) == strategy) ||
3122                (NUM_STRATEGIES == strategy)) &&
3123                isStreamActive((AudioSystem::stream_type)i, inPastMs, sysTime)) {
3124            return true;
3125        }
3126    }
3127    return false;
3128}
3129
3130bool AudioPolicyManagerBase::AudioOutputDescriptor::isStreamActive(AudioSystem::stream_type stream,
3131                                                                       uint32_t inPastMs,
3132                                                                       nsecs_t sysTime) const
3133{
3134    if (mRefCount[stream] != 0) {
3135        return true;
3136    }
3137    if (inPastMs == 0) {
3138        return false;
3139    }
3140    if (sysTime == 0) {
3141        sysTime = systemTime();
3142    }
3143    if (ns2ms(sysTime - mStopTime[stream]) < inPastMs) {
3144        return true;
3145    }
3146    return false;
3147}
3148
3149
3150status_t AudioPolicyManagerBase::AudioOutputDescriptor::dump(int fd)
3151{
3152    const size_t SIZE = 256;
3153    char buffer[SIZE];
3154    String8 result;
3155
3156    snprintf(buffer, SIZE, " Sampling rate: %d\n", mSamplingRate);
3157    result.append(buffer);
3158    snprintf(buffer, SIZE, " Format: %d\n", mFormat);
3159    result.append(buffer);
3160    snprintf(buffer, SIZE, " Channels: %08x\n", mChannelMask);
3161    result.append(buffer);
3162    snprintf(buffer, SIZE, " Latency: %d\n", mLatency);
3163    result.append(buffer);
3164    snprintf(buffer, SIZE, " Flags %08x\n", mFlags);
3165    result.append(buffer);
3166    snprintf(buffer, SIZE, " Devices %08x\n", device());
3167    result.append(buffer);
3168    snprintf(buffer, SIZE, " Stream volume refCount muteCount\n");
3169    result.append(buffer);
3170    for (int i = 0; i < AudioSystem::NUM_STREAM_TYPES; i++) {
3171        snprintf(buffer, SIZE, " %02d     %.03f     %02d       %02d\n", i, mCurVolume[i], mRefCount[i], mMuteCount[i]);
3172        result.append(buffer);
3173    }
3174    write(fd, result.string(), result.size());
3175
3176    return NO_ERROR;
3177}
3178
3179// --- AudioInputDescriptor class implementation
3180
3181AudioPolicyManagerBase::AudioInputDescriptor::AudioInputDescriptor(const IOProfile *profile)
3182    : mSamplingRate(0), mFormat((audio_format_t)0), mChannelMask((audio_channel_mask_t)0),
3183      mDevice(AUDIO_DEVICE_NONE), mRefCount(0),
3184      mInputSource(0), mProfile(profile)
3185{
3186}
3187
3188status_t AudioPolicyManagerBase::AudioInputDescriptor::dump(int fd)
3189{
3190    const size_t SIZE = 256;
3191    char buffer[SIZE];
3192    String8 result;
3193
3194    snprintf(buffer, SIZE, " Sampling rate: %d\n", mSamplingRate);
3195    result.append(buffer);
3196    snprintf(buffer, SIZE, " Format: %d\n", mFormat);
3197    result.append(buffer);
3198    snprintf(buffer, SIZE, " Channels: %08x\n", mChannelMask);
3199    result.append(buffer);
3200    snprintf(buffer, SIZE, " Devices %08x\n", mDevice);
3201    result.append(buffer);
3202    snprintf(buffer, SIZE, " Ref Count %d\n", mRefCount);
3203    result.append(buffer);
3204    write(fd, result.string(), result.size());
3205
3206    return NO_ERROR;
3207}
3208
3209// --- StreamDescriptor class implementation
3210
3211AudioPolicyManagerBase::StreamDescriptor::StreamDescriptor()
3212    :   mIndexMin(0), mIndexMax(1), mCanBeMuted(true)
3213{
3214    mIndexCur.add(AUDIO_DEVICE_OUT_DEFAULT, 0);
3215}
3216
3217int AudioPolicyManagerBase::StreamDescriptor::getVolumeIndex(audio_devices_t device)
3218{
3219    device = AudioPolicyManagerBase::getDeviceForVolume(device);
3220    // there is always a valid entry for AUDIO_DEVICE_OUT_DEFAULT
3221    if (mIndexCur.indexOfKey(device) < 0) {
3222        device = AUDIO_DEVICE_OUT_DEFAULT;
3223    }
3224    return mIndexCur.valueFor(device);
3225}
3226
3227void AudioPolicyManagerBase::StreamDescriptor::dump(int fd)
3228{
3229    const size_t SIZE = 256;
3230    char buffer[SIZE];
3231    String8 result;
3232
3233    snprintf(buffer, SIZE, "%s         %02d         %02d         ",
3234             mCanBeMuted ? "true " : "false", mIndexMin, mIndexMax);
3235    result.append(buffer);
3236    for (size_t i = 0; i < mIndexCur.size(); i++) {
3237        snprintf(buffer, SIZE, "%04x : %02d, ",
3238                 mIndexCur.keyAt(i),
3239                 mIndexCur.valueAt(i));
3240        result.append(buffer);
3241    }
3242    result.append("\n");
3243
3244    write(fd, result.string(), result.size());
3245}
3246
3247// --- EffectDescriptor class implementation
3248
3249status_t AudioPolicyManagerBase::EffectDescriptor::dump(int fd)
3250{
3251    const size_t SIZE = 256;
3252    char buffer[SIZE];
3253    String8 result;
3254
3255    snprintf(buffer, SIZE, " I/O: %d\n", mIo);
3256    result.append(buffer);
3257    snprintf(buffer, SIZE, " Strategy: %d\n", mStrategy);
3258    result.append(buffer);
3259    snprintf(buffer, SIZE, " Session: %d\n", mSession);
3260    result.append(buffer);
3261    snprintf(buffer, SIZE, " Name: %s\n",  mDesc.name);
3262    result.append(buffer);
3263    snprintf(buffer, SIZE, " %s\n",  mEnabled ? "Enabled" : "Disabled");
3264    result.append(buffer);
3265    write(fd, result.string(), result.size());
3266
3267    return NO_ERROR;
3268}
3269
3270// --- IOProfile class implementation
3271
3272AudioPolicyManagerBase::HwModule::HwModule(const char *name)
3273    : mName(strndup(name, AUDIO_HARDWARE_MODULE_ID_MAX_LEN)), mHandle(0)
3274{
3275}
3276
3277AudioPolicyManagerBase::HwModule::~HwModule()
3278{
3279    for (size_t i = 0; i < mOutputProfiles.size(); i++) {
3280         delete mOutputProfiles[i];
3281    }
3282    for (size_t i = 0; i < mInputProfiles.size(); i++) {
3283         delete mInputProfiles[i];
3284    }
3285    free((void *)mName);
3286}
3287
3288void AudioPolicyManagerBase::HwModule::dump(int fd)
3289{
3290    const size_t SIZE = 256;
3291    char buffer[SIZE];
3292    String8 result;
3293
3294    snprintf(buffer, SIZE, "  - name: %s\n", mName);
3295    result.append(buffer);
3296    snprintf(buffer, SIZE, "  - handle: %d\n", mHandle);
3297    result.append(buffer);
3298    write(fd, result.string(), result.size());
3299    if (mOutputProfiles.size()) {
3300        write(fd, "  - outputs:\n", sizeof("  - outputs:\n"));
3301        for (size_t i = 0; i < mOutputProfiles.size(); i++) {
3302            snprintf(buffer, SIZE, "    output %d:\n", i);
3303            write(fd, buffer, strlen(buffer));
3304            mOutputProfiles[i]->dump(fd);
3305        }
3306    }
3307    if (mInputProfiles.size()) {
3308        write(fd, "  - inputs:\n", sizeof("  - inputs:\n"));
3309        for (size_t i = 0; i < mInputProfiles.size(); i++) {
3310            snprintf(buffer, SIZE, "    input %d:\n", i);
3311            write(fd, buffer, strlen(buffer));
3312            mInputProfiles[i]->dump(fd);
3313        }
3314    }
3315}
3316
3317AudioPolicyManagerBase::IOProfile::IOProfile(HwModule *module)
3318    : mFlags((audio_output_flags_t)0), mModule(module)
3319{
3320}
3321
3322AudioPolicyManagerBase::IOProfile::~IOProfile()
3323{
3324}
3325
3326// checks if the IO profile is compatible with specified parameters. By convention a value of 0
3327// means a parameter is don't care
3328bool AudioPolicyManagerBase::IOProfile::isCompatibleProfile(audio_devices_t device,
3329                                                            uint32_t samplingRate,
3330                                                            uint32_t format,
3331                                                            uint32_t channelMask,
3332                                                            audio_output_flags_t flags) const
3333{
3334    if ((mSupportedDevices & device) != device) {
3335        return false;
3336    }
3337    if ((mFlags & flags) != flags) {
3338        return false;
3339    }
3340    if (samplingRate != 0) {
3341        size_t i;
3342        for (i = 0; i < mSamplingRates.size(); i++)
3343        {
3344            if (mSamplingRates[i] == samplingRate) {
3345                break;
3346            }
3347        }
3348        if (i == mSamplingRates.size()) {
3349            return false;
3350        }
3351    }
3352    if (format != 0) {
3353        size_t i;
3354        for (i = 0; i < mFormats.size(); i++)
3355        {
3356            if (mFormats[i] == format) {
3357                break;
3358            }
3359        }
3360        if (i == mFormats.size()) {
3361            return false;
3362        }
3363    }
3364    if (channelMask != 0) {
3365        size_t i;
3366        for (i = 0; i < mChannelMasks.size(); i++)
3367        {
3368            if (mChannelMasks[i] == channelMask) {
3369                break;
3370            }
3371        }
3372        if (i == mChannelMasks.size()) {
3373            return false;
3374        }
3375    }
3376    return true;
3377}
3378
3379void AudioPolicyManagerBase::IOProfile::dump(int fd)
3380{
3381    const size_t SIZE = 256;
3382    char buffer[SIZE];
3383    String8 result;
3384
3385    snprintf(buffer, SIZE, "    - sampling rates: ");
3386    result.append(buffer);
3387    for (size_t i = 0; i < mSamplingRates.size(); i++) {
3388        snprintf(buffer, SIZE, "%d", mSamplingRates[i]);
3389        result.append(buffer);
3390        result.append(i == (mSamplingRates.size() - 1) ? "\n" : ", ");
3391    }
3392
3393    snprintf(buffer, SIZE, "    - channel masks: ");
3394    result.append(buffer);
3395    for (size_t i = 0; i < mChannelMasks.size(); i++) {
3396        snprintf(buffer, SIZE, "%04x", mChannelMasks[i]);
3397        result.append(buffer);
3398        result.append(i == (mChannelMasks.size() - 1) ? "\n" : ", ");
3399    }
3400
3401    snprintf(buffer, SIZE, "    - formats: ");
3402    result.append(buffer);
3403    for (size_t i = 0; i < mFormats.size(); i++) {
3404        snprintf(buffer, SIZE, "%d", mFormats[i]);
3405        result.append(buffer);
3406        result.append(i == (mFormats.size() - 1) ? "\n" : ", ");
3407    }
3408
3409    snprintf(buffer, SIZE, "    - devices: %04x\n", mSupportedDevices);
3410    result.append(buffer);
3411    snprintf(buffer, SIZE, "    - flags: %04x\n", mFlags);
3412    result.append(buffer);
3413
3414    write(fd, result.string(), result.size());
3415}
3416
3417// --- audio_policy.conf file parsing
3418
3419struct StringToEnum {
3420    const char *name;
3421    uint32_t value;
3422};
3423
3424#define STRING_TO_ENUM(string) { #string, string }
3425#define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0]))
3426
3427const struct StringToEnum sDeviceNameToEnumTable[] = {
3428    STRING_TO_ENUM(AUDIO_DEVICE_OUT_EARPIECE),
3429    STRING_TO_ENUM(AUDIO_DEVICE_OUT_SPEAKER),
3430    STRING_TO_ENUM(AUDIO_DEVICE_OUT_WIRED_HEADSET),
3431    STRING_TO_ENUM(AUDIO_DEVICE_OUT_WIRED_HEADPHONE),
3432    STRING_TO_ENUM(AUDIO_DEVICE_OUT_ALL_SCO),
3433    STRING_TO_ENUM(AUDIO_DEVICE_OUT_ALL_A2DP),
3434    STRING_TO_ENUM(AUDIO_DEVICE_OUT_AUX_DIGITAL),
3435    STRING_TO_ENUM(AUDIO_DEVICE_OUT_DGTL_DOCK_HEADSET),
3436    STRING_TO_ENUM(AUDIO_DEVICE_OUT_ANLG_DOCK_HEADSET),
3437    STRING_TO_ENUM(AUDIO_DEVICE_OUT_USB_DEVICE),
3438    STRING_TO_ENUM(AUDIO_DEVICE_OUT_USB_ACCESSORY),
3439    STRING_TO_ENUM(AUDIO_DEVICE_OUT_ALL_USB),
3440    STRING_TO_ENUM(AUDIO_DEVICE_OUT_REMOTE_SUBMIX),
3441    STRING_TO_ENUM(AUDIO_DEVICE_IN_BUILTIN_MIC),
3442    STRING_TO_ENUM(AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET),
3443    STRING_TO_ENUM(AUDIO_DEVICE_IN_WIRED_HEADSET),
3444    STRING_TO_ENUM(AUDIO_DEVICE_IN_AUX_DIGITAL),
3445    STRING_TO_ENUM(AUDIO_DEVICE_IN_VOICE_CALL),
3446    STRING_TO_ENUM(AUDIO_DEVICE_IN_BACK_MIC),
3447    STRING_TO_ENUM(AUDIO_DEVICE_IN_REMOTE_SUBMIX),
3448    STRING_TO_ENUM(AUDIO_DEVICE_IN_ANLG_DOCK_HEADSET),
3449    STRING_TO_ENUM(AUDIO_DEVICE_IN_DGTL_DOCK_HEADSET),
3450    STRING_TO_ENUM(AUDIO_DEVICE_IN_USB_ACCESSORY),
3451};
3452
3453const struct StringToEnum sFlagNameToEnumTable[] = {
3454    STRING_TO_ENUM(AUDIO_OUTPUT_FLAG_DIRECT),
3455    STRING_TO_ENUM(AUDIO_OUTPUT_FLAG_PRIMARY),
3456    STRING_TO_ENUM(AUDIO_OUTPUT_FLAG_FAST),
3457    STRING_TO_ENUM(AUDIO_OUTPUT_FLAG_DEEP_BUFFER),
3458};
3459
3460const struct StringToEnum sFormatNameToEnumTable[] = {
3461    STRING_TO_ENUM(AUDIO_FORMAT_PCM_16_BIT),
3462    STRING_TO_ENUM(AUDIO_FORMAT_PCM_8_BIT),
3463    STRING_TO_ENUM(AUDIO_FORMAT_MP3),
3464    STRING_TO_ENUM(AUDIO_FORMAT_AAC),
3465    STRING_TO_ENUM(AUDIO_FORMAT_VORBIS),
3466};
3467
3468const struct StringToEnum sOutChannelsNameToEnumTable[] = {
3469    STRING_TO_ENUM(AUDIO_CHANNEL_OUT_MONO),
3470    STRING_TO_ENUM(AUDIO_CHANNEL_OUT_STEREO),
3471    STRING_TO_ENUM(AUDIO_CHANNEL_OUT_5POINT1),
3472    STRING_TO_ENUM(AUDIO_CHANNEL_OUT_7POINT1),
3473};
3474
3475const struct StringToEnum sInChannelsNameToEnumTable[] = {
3476    STRING_TO_ENUM(AUDIO_CHANNEL_IN_MONO),
3477    STRING_TO_ENUM(AUDIO_CHANNEL_IN_STEREO),
3478    STRING_TO_ENUM(AUDIO_CHANNEL_IN_FRONT_BACK),
3479};
3480
3481
3482uint32_t AudioPolicyManagerBase::stringToEnum(const struct StringToEnum *table,
3483                                              size_t size,
3484                                              const char *name)
3485{
3486    for (size_t i = 0; i < size; i++) {
3487        if (strcmp(table[i].name, name) == 0) {
3488            ALOGV("stringToEnum() found %s", table[i].name);
3489            return table[i].value;
3490        }
3491    }
3492    return 0;
3493}
3494
3495audio_output_flags_t AudioPolicyManagerBase::parseFlagNames(char *name)
3496{
3497    uint32_t flag = 0;
3498
3499    // it is OK to cast name to non const here as we are not going to use it after
3500    // strtok() modifies it
3501    char *flagName = strtok(name, "|");
3502    while (flagName != NULL) {
3503        if (strlen(flagName) != 0) {
3504            flag |= stringToEnum(sFlagNameToEnumTable,
3505                               ARRAY_SIZE(sFlagNameToEnumTable),
3506                               flagName);
3507        }
3508        flagName = strtok(NULL, "|");
3509    }
3510    return (audio_output_flags_t)flag;
3511}
3512
3513audio_devices_t AudioPolicyManagerBase::parseDeviceNames(char *name)
3514{
3515    uint32_t device = 0;
3516
3517    char *devName = strtok(name, "|");
3518    while (devName != NULL) {
3519        if (strlen(devName) != 0) {
3520            device |= stringToEnum(sDeviceNameToEnumTable,
3521                                 ARRAY_SIZE(sDeviceNameToEnumTable),
3522                                 devName);
3523        }
3524        devName = strtok(NULL, "|");
3525    }
3526    return device;
3527}
3528
3529void AudioPolicyManagerBase::loadSamplingRates(char *name, IOProfile *profile)
3530{
3531    char *str = strtok(name, "|");
3532
3533    // by convention, "0' in the first entry in mSamplingRates indicates the supported sampling
3534    // rates should be read from the output stream after it is opened for the first time
3535    if (str != NULL && strcmp(str, DYNAMIC_VALUE_TAG) == 0) {
3536        profile->mSamplingRates.add(0);
3537        return;
3538    }
3539
3540    while (str != NULL) {
3541        uint32_t rate = atoi(str);
3542        if (rate != 0) {
3543            ALOGV("loadSamplingRates() adding rate %d", rate);
3544            profile->mSamplingRates.add(rate);
3545        }
3546        str = strtok(NULL, "|");
3547    }
3548    return;
3549}
3550
3551void AudioPolicyManagerBase::loadFormats(char *name, IOProfile *profile)
3552{
3553    char *str = strtok(name, "|");
3554
3555    // by convention, "0' in the first entry in mFormats indicates the supported formats
3556    // should be read from the output stream after it is opened for the first time
3557    if (str != NULL && strcmp(str, DYNAMIC_VALUE_TAG) == 0) {
3558        profile->mFormats.add((audio_format_t)0);
3559        return;
3560    }
3561
3562    while (str != NULL) {
3563        audio_format_t format = (audio_format_t)stringToEnum(sFormatNameToEnumTable,
3564                                                             ARRAY_SIZE(sFormatNameToEnumTable),
3565                                                             str);
3566        if (format != 0) {
3567            profile->mFormats.add(format);
3568        }
3569        str = strtok(NULL, "|");
3570    }
3571    return;
3572}
3573
3574void AudioPolicyManagerBase::loadInChannels(char *name, IOProfile *profile)
3575{
3576    const char *str = strtok(name, "|");
3577
3578    ALOGV("loadInChannels() %s", name);
3579
3580    if (str != NULL && strcmp(str, DYNAMIC_VALUE_TAG) == 0) {
3581        profile->mChannelMasks.add((audio_channel_mask_t)0);
3582        return;
3583    }
3584
3585    while (str != NULL) {
3586        audio_channel_mask_t channelMask =
3587                (audio_channel_mask_t)stringToEnum(sInChannelsNameToEnumTable,
3588                                                   ARRAY_SIZE(sInChannelsNameToEnumTable),
3589                                                   str);
3590        if (channelMask != 0) {
3591            ALOGV("loadInChannels() adding channelMask %04x", channelMask);
3592            profile->mChannelMasks.add(channelMask);
3593        }
3594        str = strtok(NULL, "|");
3595    }
3596    return;
3597}
3598
3599void AudioPolicyManagerBase::loadOutChannels(char *name, IOProfile *profile)
3600{
3601    const char *str = strtok(name, "|");
3602
3603    ALOGV("loadOutChannels() %s", name);
3604
3605    // by convention, "0' in the first entry in mChannelMasks indicates the supported channel
3606    // masks should be read from the output stream after it is opened for the first time
3607    if (str != NULL && strcmp(str, DYNAMIC_VALUE_TAG) == 0) {
3608        profile->mChannelMasks.add((audio_channel_mask_t)0);
3609        return;
3610    }
3611
3612    while (str != NULL) {
3613        audio_channel_mask_t channelMask =
3614                (audio_channel_mask_t)stringToEnum(sOutChannelsNameToEnumTable,
3615                                                   ARRAY_SIZE(sOutChannelsNameToEnumTable),
3616                                                   str);
3617        if (channelMask != 0) {
3618            profile->mChannelMasks.add(channelMask);
3619        }
3620        str = strtok(NULL, "|");
3621    }
3622    return;
3623}
3624
3625status_t AudioPolicyManagerBase::loadInput(cnode *root, HwModule *module)
3626{
3627    cnode *node = root->first_child;
3628
3629    IOProfile *profile = new IOProfile(module);
3630
3631    while (node) {
3632        if (strcmp(node->name, SAMPLING_RATES_TAG) == 0) {
3633            loadSamplingRates((char *)node->value, profile);
3634        } else if (strcmp(node->name, FORMATS_TAG) == 0) {
3635            loadFormats((char *)node->value, profile);
3636        } else if (strcmp(node->name, CHANNELS_TAG) == 0) {
3637            loadInChannels((char *)node->value, profile);
3638        } else if (strcmp(node->name, DEVICES_TAG) == 0) {
3639            profile->mSupportedDevices = parseDeviceNames((char *)node->value);
3640        }
3641        node = node->next;
3642    }
3643    ALOGW_IF(profile->mSupportedDevices == AUDIO_DEVICE_NONE,
3644            "loadInput() invalid supported devices");
3645    ALOGW_IF(profile->mChannelMasks.size() == 0,
3646            "loadInput() invalid supported channel masks");
3647    ALOGW_IF(profile->mSamplingRates.size() == 0,
3648            "loadInput() invalid supported sampling rates");
3649    ALOGW_IF(profile->mFormats.size() == 0,
3650            "loadInput() invalid supported formats");
3651    if ((profile->mSupportedDevices != AUDIO_DEVICE_NONE) &&
3652            (profile->mChannelMasks.size() != 0) &&
3653            (profile->mSamplingRates.size() != 0) &&
3654            (profile->mFormats.size() != 0)) {
3655
3656        ALOGV("loadInput() adding input mSupportedDevices %04x", profile->mSupportedDevices);
3657
3658        module->mInputProfiles.add(profile);
3659        return NO_ERROR;
3660    } else {
3661        delete profile;
3662        return BAD_VALUE;
3663    }
3664}
3665
3666status_t AudioPolicyManagerBase::loadOutput(cnode *root, HwModule *module)
3667{
3668    cnode *node = root->first_child;
3669
3670    IOProfile *profile = new IOProfile(module);
3671
3672    while (node) {
3673        if (strcmp(node->name, SAMPLING_RATES_TAG) == 0) {
3674            loadSamplingRates((char *)node->value, profile);
3675        } else if (strcmp(node->name, FORMATS_TAG) == 0) {
3676            loadFormats((char *)node->value, profile);
3677        } else if (strcmp(node->name, CHANNELS_TAG) == 0) {
3678            loadOutChannels((char *)node->value, profile);
3679        } else if (strcmp(node->name, DEVICES_TAG) == 0) {
3680            profile->mSupportedDevices = parseDeviceNames((char *)node->value);
3681        } else if (strcmp(node->name, FLAGS_TAG) == 0) {
3682            profile->mFlags = parseFlagNames((char *)node->value);
3683        }
3684        node = node->next;
3685    }
3686    ALOGW_IF(profile->mSupportedDevices == AUDIO_DEVICE_NONE,
3687            "loadOutput() invalid supported devices");
3688    ALOGW_IF(profile->mChannelMasks.size() == 0,
3689            "loadOutput() invalid supported channel masks");
3690    ALOGW_IF(profile->mSamplingRates.size() == 0,
3691            "loadOutput() invalid supported sampling rates");
3692    ALOGW_IF(profile->mFormats.size() == 0,
3693            "loadOutput() invalid supported formats");
3694    if ((profile->mSupportedDevices != AUDIO_DEVICE_NONE) &&
3695            (profile->mChannelMasks.size() != 0) &&
3696            (profile->mSamplingRates.size() != 0) &&
3697            (profile->mFormats.size() != 0)) {
3698
3699        ALOGV("loadOutput() adding output mSupportedDevices %04x, mFlags %04x",
3700              profile->mSupportedDevices, profile->mFlags);
3701
3702        module->mOutputProfiles.add(profile);
3703        return NO_ERROR;
3704    } else {
3705        delete profile;
3706        return BAD_VALUE;
3707    }
3708}
3709
3710void AudioPolicyManagerBase::loadHwModule(cnode *root)
3711{
3712    cnode *node = config_find(root, OUTPUTS_TAG);
3713    status_t status = NAME_NOT_FOUND;
3714
3715    HwModule *module = new HwModule(root->name);
3716
3717    if (node != NULL) {
3718        if (strcmp(root->name, AUDIO_HARDWARE_MODULE_ID_A2DP) == 0) {
3719            mHasA2dp = true;
3720        } else if (strcmp(root->name, AUDIO_HARDWARE_MODULE_ID_USB) == 0) {
3721            mHasUsb = true;
3722        } else if (strcmp(root->name, AUDIO_HARDWARE_MODULE_ID_REMOTE_SUBMIX) == 0) {
3723            mHasRemoteSubmix = true;
3724        }
3725
3726        node = node->first_child;
3727        while (node) {
3728            ALOGV("loadHwModule() loading output %s", node->name);
3729            status_t tmpStatus = loadOutput(node, module);
3730            if (status == NAME_NOT_FOUND || status == NO_ERROR) {
3731                status = tmpStatus;
3732            }
3733            node = node->next;
3734        }
3735    }
3736    node = config_find(root, INPUTS_TAG);
3737    if (node != NULL) {
3738        node = node->first_child;
3739        while (node) {
3740            ALOGV("loadHwModule() loading input %s", node->name);
3741            status_t tmpStatus = loadInput(node, module);
3742            if (status == NAME_NOT_FOUND || status == NO_ERROR) {
3743                status = tmpStatus;
3744            }
3745            node = node->next;
3746        }
3747    }
3748    if (status == NO_ERROR) {
3749        mHwModules.add(module);
3750    } else {
3751        delete module;
3752    }
3753}
3754
3755void AudioPolicyManagerBase::loadHwModules(cnode *root)
3756{
3757    cnode *node = config_find(root, AUDIO_HW_MODULE_TAG);
3758    if (node == NULL) {
3759        return;
3760    }
3761
3762    node = node->first_child;
3763    while (node) {
3764        ALOGV("loadHwModules() loading module %s", node->name);
3765        loadHwModule(node);
3766        node = node->next;
3767    }
3768}
3769
3770void AudioPolicyManagerBase::loadGlobalConfig(cnode *root)
3771{
3772    cnode *node = config_find(root, GLOBAL_CONFIG_TAG);
3773    if (node == NULL) {
3774        return;
3775    }
3776    node = node->first_child;
3777    while (node) {
3778        if (strcmp(ATTACHED_OUTPUT_DEVICES_TAG, node->name) == 0) {
3779            mAttachedOutputDevices = parseDeviceNames((char *)node->value);
3780            ALOGW_IF(mAttachedOutputDevices == AUDIO_DEVICE_NONE,
3781                    "loadGlobalConfig() no attached output devices");
3782            ALOGV("loadGlobalConfig() mAttachedOutputDevices %04x", mAttachedOutputDevices);
3783        } else if (strcmp(DEFAULT_OUTPUT_DEVICE_TAG, node->name) == 0) {
3784            mDefaultOutputDevice = (audio_devices_t)stringToEnum(sDeviceNameToEnumTable,
3785                                              ARRAY_SIZE(sDeviceNameToEnumTable),
3786                                              (char *)node->value);
3787            ALOGW_IF(mDefaultOutputDevice == AUDIO_DEVICE_NONE,
3788                    "loadGlobalConfig() default device not specified");
3789            ALOGV("loadGlobalConfig() mDefaultOutputDevice %04x", mDefaultOutputDevice);
3790        } else if (strcmp(ATTACHED_INPUT_DEVICES_TAG, node->name) == 0) {
3791            mAvailableInputDevices = parseDeviceNames((char *)node->value) & ~AUDIO_DEVICE_BIT_IN;
3792            ALOGV("loadGlobalConfig() mAvailableInputDevices %04x", mAvailableInputDevices);
3793        }
3794        node = node->next;
3795    }
3796}
3797
3798status_t AudioPolicyManagerBase::loadAudioPolicyConfig(const char *path)
3799{
3800    cnode *root;
3801    char *data;
3802
3803    data = (char *)load_file(path, NULL);
3804    if (data == NULL) {
3805        return -ENODEV;
3806    }
3807    root = config_node("", "");
3808    config_load(root, data);
3809
3810    loadGlobalConfig(root);
3811    loadHwModules(root);
3812
3813    config_free(root);
3814    free(root);
3815    free(data);
3816
3817    ALOGI("loadAudioPolicyConfig() loaded %s\n", path);
3818
3819    return NO_ERROR;
3820}
3821
3822void AudioPolicyManagerBase::defaultAudioPolicyConfig(void)
3823{
3824    HwModule *module;
3825    IOProfile *profile;
3826
3827    mDefaultOutputDevice = AUDIO_DEVICE_OUT_SPEAKER;
3828    mAttachedOutputDevices = AUDIO_DEVICE_OUT_SPEAKER;
3829    mAvailableInputDevices = AUDIO_DEVICE_IN_BUILTIN_MIC & ~AUDIO_DEVICE_BIT_IN;
3830
3831    module = new HwModule("primary");
3832
3833    profile = new IOProfile(module);
3834    profile->mSamplingRates.add(44100);
3835    profile->mFormats.add(AUDIO_FORMAT_PCM_16_BIT);
3836    profile->mChannelMasks.add(AUDIO_CHANNEL_OUT_STEREO);
3837    profile->mSupportedDevices = AUDIO_DEVICE_OUT_SPEAKER;
3838    profile->mFlags = AUDIO_OUTPUT_FLAG_PRIMARY;
3839    module->mOutputProfiles.add(profile);
3840
3841    profile = new IOProfile(module);
3842    profile->mSamplingRates.add(8000);
3843    profile->mFormats.add(AUDIO_FORMAT_PCM_16_BIT);
3844    profile->mChannelMasks.add(AUDIO_CHANNEL_IN_MONO);
3845    profile->mSupportedDevices = AUDIO_DEVICE_IN_BUILTIN_MIC;
3846    module->mInputProfiles.add(profile);
3847
3848    mHwModules.add(module);
3849}
3850
3851}; // namespace android
3852