AudioPolicyManagerBase.cpp revision 000bb51ca507645f3aa4ccfcbbb8859e8d539629 
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#include <cutils/properties.h>
41
42namespace android_audio_legacy {
43
44// ----------------------------------------------------------------------------
45// AudioPolicyInterface implementation
46// ----------------------------------------------------------------------------
47
48
49status_t AudioPolicyManagerBase::setDeviceConnectionState(audio_devices_t device,
50                                                  AudioSystem::device_connection_state state,
51                                                  const char *device_address)
52{
53    SortedVector <audio_io_handle_t> outputs;
54
55    ALOGV("setDeviceConnectionState() device: %x, state %d, address %s", device, state, device_address);
56
57    // connect/disconnect only 1 device at a time
58    if (!audio_is_output_device(device) && !audio_is_input_device(device)) return BAD_VALUE;
59
60    if (strlen(device_address) >= MAX_DEVICE_ADDRESS_LEN) {
61        ALOGE("setDeviceConnectionState() invalid address: %s", device_address);
62        return BAD_VALUE;
63    }
64
65    // handle output devices
66    if (audio_is_output_device(device)) {
67
68        if (!mHasA2dp && audio_is_a2dp_device(device)) {
69            ALOGE("setDeviceConnectionState() invalid A2DP device: %x", device);
70            return BAD_VALUE;
71        }
72        if (!mHasUsb && audio_is_usb_device(device)) {
73            ALOGE("setDeviceConnectionState() invalid USB audio device: %x", device);
74            return BAD_VALUE;
75        }
76        if (!mHasRemoteSubmix && audio_is_remote_submix_device((audio_devices_t)device)) {
77            ALOGE("setDeviceConnectionState() invalid remote submix audio device: %x", device);
78            return BAD_VALUE;
79        }
80
81        // save a copy of the opened output descriptors before any output is opened or closed
82        // by checkOutputsForDevice(). This will be needed by checkOutputForAllStrategies()
83        mPreviousOutputs = mOutputs;
84        switch (state)
85        {
86        // handle output device connection
87        case AudioSystem::DEVICE_STATE_AVAILABLE:
88            if (mAvailableOutputDevices & device) {
89                ALOGW("setDeviceConnectionState() device already connected: %x", device);
90                return INVALID_OPERATION;
91            }
92            ALOGV("setDeviceConnectionState() connecting device %x", device);
93
94            if (checkOutputsForDevice(device, state, outputs) != NO_ERROR) {
95                return INVALID_OPERATION;
96            }
97            ALOGV("setDeviceConnectionState() checkOutputsForDevice() returned %d outputs",
98                  outputs.size());
99            // register new device as available
100            mAvailableOutputDevices = (audio_devices_t)(mAvailableOutputDevices | device);
101
102            if (!outputs.isEmpty()) {
103                String8 paramStr;
104                if (mHasA2dp && audio_is_a2dp_device(device)) {
105                    // handle A2DP device connection
106                    AudioParameter param;
107                    param.add(String8(AUDIO_PARAMETER_A2DP_SINK_ADDRESS), String8(device_address));
108                    paramStr = param.toString();
109                    mA2dpDeviceAddress = String8(device_address, MAX_DEVICE_ADDRESS_LEN);
110                    mA2dpSuspended = false;
111                } else if (audio_is_bluetooth_sco_device(device)) {
112                    // handle SCO device connection
113                    mScoDeviceAddress = String8(device_address, MAX_DEVICE_ADDRESS_LEN);
114                } else if (mHasUsb && audio_is_usb_device(device)) {
115                    // handle USB device connection
116                    mUsbCardAndDevice = String8(device_address, MAX_DEVICE_ADDRESS_LEN);
117                    paramStr = mUsbCardAndDevice;
118                }
119                // not currently handling multiple simultaneous submixes: ignoring remote submix
120                //   case and address
121                if (!paramStr.isEmpty()) {
122                    for (size_t i = 0; i < outputs.size(); i++) {
123                        mpClientInterface->setParameters(outputs[i], paramStr);
124                    }
125                }
126            }
127            break;
128        // handle output device disconnection
129        case AudioSystem::DEVICE_STATE_UNAVAILABLE: {
130            if (!(mAvailableOutputDevices & device)) {
131                ALOGW("setDeviceConnectionState() device not connected: %x", device);
132                return INVALID_OPERATION;
133            }
134
135            ALOGV("setDeviceConnectionState() disconnecting device %x", device);
136            // remove device from available output devices
137            mAvailableOutputDevices = (audio_devices_t)(mAvailableOutputDevices & ~device);
138
139            checkOutputsForDevice(device, state, outputs);
140            if (mHasA2dp && audio_is_a2dp_device(device)) {
141                // handle A2DP device disconnection
142                mA2dpDeviceAddress = "";
143                mA2dpSuspended = false;
144            } else if (audio_is_bluetooth_sco_device(device)) {
145                // handle SCO device disconnection
146                mScoDeviceAddress = "";
147            } else if (mHasUsb && audio_is_usb_device(device)) {
148                // handle USB device disconnection
149                mUsbCardAndDevice = "";
150            }
151            // not currently handling multiple simultaneous submixes: ignoring remote submix
152            //   case and address
153            } break;
154
155        default:
156            ALOGE("setDeviceConnectionState() invalid state: %x", state);
157            return BAD_VALUE;
158        }
159
160        checkA2dpSuspend();
161        checkOutputForAllStrategies();
162        // outputs must be closed after checkOutputForAllStrategies() is executed
163        if (!outputs.isEmpty()) {
164            for (size_t i = 0; i < outputs.size(); i++) {
165                AudioOutputDescriptor *desc = mOutputs.valueFor(outputs[i]);
166                // close unused outputs after device disconnection or direct outputs that have been
167                // opened by checkOutputsForDevice() to query dynamic parameters
168                if ((state == AudioSystem::DEVICE_STATE_UNAVAILABLE) ||
169                        (((desc->mFlags & AUDIO_OUTPUT_FLAG_DIRECT) != 0) &&
170                         (desc->mDirectOpenCount == 0))) {
171                    closeOutput(outputs[i]);
172                }
173            }
174        }
175
176        updateDevicesAndOutputs();
177        for (size_t i = 0; i < mOutputs.size(); i++) {
178            // do not force device change on duplicated output because if device is 0, it will
179            // also force a device 0 for the two outputs it is duplicated to which may override
180            // a valid device selection on those outputs.
181            setOutputDevice(mOutputs.keyAt(i),
182                            getNewDevice(mOutputs.keyAt(i), true /*fromCache*/),
183                            !mOutputs.valueAt(i)->isDuplicated(),
184                            0);
185        }
186
187        if (device == AUDIO_DEVICE_OUT_WIRED_HEADSET) {
188            device = AUDIO_DEVICE_IN_WIRED_HEADSET;
189        } else if (device == AUDIO_DEVICE_OUT_BLUETOOTH_SCO ||
190                   device == AUDIO_DEVICE_OUT_BLUETOOTH_SCO_HEADSET ||
191                   device == AUDIO_DEVICE_OUT_BLUETOOTH_SCO_CARKIT) {
192            device = AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET;
193        } else {
194            return NO_ERROR;
195        }
196    }
197    // handle input devices
198    if (audio_is_input_device(device)) {
199
200        switch (state)
201        {
202        // handle input device connection
203        case AudioSystem::DEVICE_STATE_AVAILABLE: {
204            if (mAvailableInputDevices & device) {
205                ALOGW("setDeviceConnectionState() device already connected: %d", device);
206                return INVALID_OPERATION;
207            }
208            mAvailableInputDevices = mAvailableInputDevices | (device & ~AUDIO_DEVICE_BIT_IN);
209            }
210            break;
211
212        // handle input device disconnection
213        case AudioSystem::DEVICE_STATE_UNAVAILABLE: {
214            if (!(mAvailableInputDevices & device)) {
215                ALOGW("setDeviceConnectionState() device not connected: %d", device);
216                return INVALID_OPERATION;
217            }
218            mAvailableInputDevices = (audio_devices_t) (mAvailableInputDevices & ~device);
219            } break;
220
221        default:
222            ALOGE("setDeviceConnectionState() invalid state: %x", state);
223            return BAD_VALUE;
224        }
225
226        audio_io_handle_t activeInput = getActiveInput();
227        if (activeInput != 0) {
228            AudioInputDescriptor *inputDesc = mInputs.valueFor(activeInput);
229            audio_devices_t newDevice = getDeviceForInputSource(inputDesc->mInputSource);
230            if ((newDevice != AUDIO_DEVICE_NONE) && (newDevice != inputDesc->mDevice)) {
231                ALOGV("setDeviceConnectionState() changing device from %x to %x for input %d",
232                        inputDesc->mDevice, newDevice, activeInput);
233                inputDesc->mDevice = newDevice;
234                AudioParameter param = AudioParameter();
235                param.addInt(String8(AudioParameter::keyRouting), (int)newDevice);
236                mpClientInterface->setParameters(activeInput, param.toString());
237            }
238        }
239
240        return NO_ERROR;
241    }
242
243    ALOGW("setDeviceConnectionState() invalid device: %x", device);
244    return BAD_VALUE;
245}
246
247AudioSystem::device_connection_state AudioPolicyManagerBase::getDeviceConnectionState(audio_devices_t device,
248                                                  const char *device_address)
249{
250    AudioSystem::device_connection_state state = AudioSystem::DEVICE_STATE_UNAVAILABLE;
251    String8 address = String8(device_address);
252    if (audio_is_output_device(device)) {
253        if (device & mAvailableOutputDevices) {
254            if (audio_is_a2dp_device(device) &&
255                (!mHasA2dp || (address != "" && mA2dpDeviceAddress != address))) {
256                return state;
257            }
258            if (audio_is_bluetooth_sco_device(device) &&
259                address != "" && mScoDeviceAddress != address) {
260                return state;
261            }
262            if (audio_is_usb_device(device) &&
263                (!mHasUsb || (address != "" && mUsbCardAndDevice != address))) {
264                ALOGE("getDeviceConnectionState() invalid device: %x", device);
265                return state;
266            }
267            if (audio_is_remote_submix_device((audio_devices_t)device) && !mHasRemoteSubmix) {
268                return state;
269            }
270            state = AudioSystem::DEVICE_STATE_AVAILABLE;
271        }
272    } else if (audio_is_input_device(device)) {
273        if (device & mAvailableInputDevices) {
274            state = AudioSystem::DEVICE_STATE_AVAILABLE;
275        }
276    }
277
278    return state;
279}
280
281void AudioPolicyManagerBase::setPhoneState(int state)
282{
283    ALOGV("setPhoneState() state %d", state);
284    audio_devices_t newDevice = AUDIO_DEVICE_NONE;
285    if (state < 0 || state >= AudioSystem::NUM_MODES) {
286        ALOGW("setPhoneState() invalid state %d", state);
287        return;
288    }
289
290    if (state == mPhoneState ) {
291        ALOGW("setPhoneState() setting same state %d", state);
292        return;
293    }
294
295    // if leaving call state, handle special case of active streams
296    // pertaining to sonification strategy see handleIncallSonification()
297    if (isInCall()) {
298        ALOGV("setPhoneState() in call state management: new state is %d", state);
299        for (int stream = 0; stream < AudioSystem::NUM_STREAM_TYPES; stream++) {
300            handleIncallSonification(stream, false, true);
301        }
302    }
303
304    // store previous phone state for management of sonification strategy below
305    int oldState = mPhoneState;
306    mPhoneState = state;
307    bool force = false;
308
309    // are we entering or starting a call
310    if (!isStateInCall(oldState) && isStateInCall(state)) {
311        ALOGV("  Entering call in setPhoneState()");
312        // force routing command to audio hardware when starting a call
313        // even if no device change is needed
314        force = true;
315        for (int j = 0; j < DEVICE_CATEGORY_CNT; j++) {
316            mStreams[AUDIO_STREAM_DTMF].mVolumeCurve[j] =
317                    sVolumeProfiles[AUDIO_STREAM_VOICE_CALL][j];
318        }
319    } else if (isStateInCall(oldState) && !isStateInCall(state)) {
320        ALOGV("  Exiting call in setPhoneState()");
321        // force routing command to audio hardware when exiting a call
322        // even if no device change is needed
323        force = true;
324        for (int j = 0; j < DEVICE_CATEGORY_CNT; j++) {
325            mStreams[AUDIO_STREAM_DTMF].mVolumeCurve[j] =
326                    sVolumeProfiles[AUDIO_STREAM_DTMF][j];
327        }
328    } else if (isStateInCall(state) && (state != oldState)) {
329        ALOGV("  Switching between telephony and VoIP in setPhoneState()");
330        // force routing command to audio hardware when switching between telephony and VoIP
331        // even if no device change is needed
332        force = true;
333    }
334
335    // check for device and output changes triggered by new phone state
336    newDevice = getNewDevice(mPrimaryOutput, false /*fromCache*/);
337    checkA2dpSuspend();
338    checkOutputForAllStrategies();
339    updateDevicesAndOutputs();
340
341    AudioOutputDescriptor *hwOutputDesc = mOutputs.valueFor(mPrimaryOutput);
342
343    // force routing command to audio hardware when ending call
344    // even if no device change is needed
345    if (isStateInCall(oldState) && newDevice == AUDIO_DEVICE_NONE) {
346        newDevice = hwOutputDesc->device();
347    }
348
349    int delayMs = 0;
350    if (isStateInCall(state)) {
351        nsecs_t sysTime = systemTime();
352        for (size_t i = 0; i < mOutputs.size(); i++) {
353            AudioOutputDescriptor *desc = mOutputs.valueAt(i);
354            // mute media and sonification strategies and delay device switch by the largest
355            // latency of any output where either strategy is active.
356            // This avoid sending the ring tone or music tail into the earpiece or headset.
357            if ((desc->isStrategyActive(STRATEGY_MEDIA,
358                                     SONIFICATION_HEADSET_MUSIC_DELAY,
359                                     sysTime) ||
360                    desc->isStrategyActive(STRATEGY_SONIFICATION,
361                                         SONIFICATION_HEADSET_MUSIC_DELAY,
362                                         sysTime)) &&
363                    (delayMs < (int)desc->mLatency*2)) {
364                delayMs = desc->mLatency*2;
365            }
366            setStrategyMute(STRATEGY_MEDIA, true, mOutputs.keyAt(i));
367            setStrategyMute(STRATEGY_MEDIA, false, mOutputs.keyAt(i), MUTE_TIME_MS,
368                getDeviceForStrategy(STRATEGY_MEDIA, true /*fromCache*/));
369            setStrategyMute(STRATEGY_SONIFICATION, true, mOutputs.keyAt(i));
370            setStrategyMute(STRATEGY_SONIFICATION, false, mOutputs.keyAt(i), MUTE_TIME_MS,
371                getDeviceForStrategy(STRATEGY_SONIFICATION, true /*fromCache*/));
372        }
373    }
374
375    // change routing is necessary
376    setOutputDevice(mPrimaryOutput, newDevice, force, delayMs);
377
378    // if entering in call state, handle special case of active streams
379    // pertaining to sonification strategy see handleIncallSonification()
380    if (isStateInCall(state)) {
381        ALOGV("setPhoneState() in call state management: new state is %d", state);
382        for (int stream = 0; stream < AudioSystem::NUM_STREAM_TYPES; stream++) {
383            handleIncallSonification(stream, true, true);
384        }
385    }
386
387    // Flag that ringtone volume must be limited to music volume until we exit MODE_RINGTONE
388    if (state == AudioSystem::MODE_RINGTONE &&
389        isStreamActive(AudioSystem::MUSIC, SONIFICATION_HEADSET_MUSIC_DELAY)) {
390        mLimitRingtoneVolume = true;
391    } else {
392        mLimitRingtoneVolume = false;
393    }
394}
395
396void AudioPolicyManagerBase::setForceUse(AudioSystem::force_use usage, AudioSystem::forced_config config)
397{
398    ALOGV("setForceUse() usage %d, config %d, mPhoneState %d", usage, config, mPhoneState);
399
400    bool forceVolumeReeval = false;
401    switch(usage) {
402    case AudioSystem::FOR_COMMUNICATION:
403        if (config != AudioSystem::FORCE_SPEAKER && config != AudioSystem::FORCE_BT_SCO &&
404            config != AudioSystem::FORCE_NONE) {
405            ALOGW("setForceUse() invalid config %d for FOR_COMMUNICATION", config);
406            return;
407        }
408        forceVolumeReeval = true;
409        mForceUse[usage] = config;
410        break;
411    case AudioSystem::FOR_MEDIA:
412        if (config != AudioSystem::FORCE_HEADPHONES && config != AudioSystem::FORCE_BT_A2DP &&
413            config != AudioSystem::FORCE_WIRED_ACCESSORY &&
414            config != AudioSystem::FORCE_ANALOG_DOCK &&
415            config != AudioSystem::FORCE_DIGITAL_DOCK && config != AudioSystem::FORCE_NONE &&
416            config != AudioSystem::FORCE_NO_BT_A2DP) {
417            ALOGW("setForceUse() invalid config %d for FOR_MEDIA", config);
418            return;
419        }
420        mForceUse[usage] = config;
421        break;
422    case AudioSystem::FOR_RECORD:
423        if (config != AudioSystem::FORCE_BT_SCO && config != AudioSystem::FORCE_WIRED_ACCESSORY &&
424            config != AudioSystem::FORCE_NONE) {
425            ALOGW("setForceUse() invalid config %d for FOR_RECORD", config);
426            return;
427        }
428        mForceUse[usage] = config;
429        break;
430    case AudioSystem::FOR_DOCK:
431        if (config != AudioSystem::FORCE_NONE && config != AudioSystem::FORCE_BT_CAR_DOCK &&
432            config != AudioSystem::FORCE_BT_DESK_DOCK &&
433            config != AudioSystem::FORCE_WIRED_ACCESSORY &&
434            config != AudioSystem::FORCE_ANALOG_DOCK &&
435            config != AudioSystem::FORCE_DIGITAL_DOCK) {
436            ALOGW("setForceUse() invalid config %d for FOR_DOCK", config);
437        }
438        forceVolumeReeval = true;
439        mForceUse[usage] = config;
440        break;
441    case AudioSystem::FOR_SYSTEM:
442        if (config != AudioSystem::FORCE_NONE &&
443            config != AudioSystem::FORCE_SYSTEM_ENFORCED) {
444            ALOGW("setForceUse() invalid config %d for FOR_SYSTEM", config);
445        }
446        forceVolumeReeval = true;
447        mForceUse[usage] = config;
448        break;
449    default:
450        ALOGW("setForceUse() invalid usage %d", usage);
451        break;
452    }
453
454    // check for device and output changes triggered by new force usage
455    checkA2dpSuspend();
456    checkOutputForAllStrategies();
457    updateDevicesAndOutputs();
458    for (size_t i = 0; i < mOutputs.size(); i++) {
459        audio_io_handle_t output = mOutputs.keyAt(i);
460        audio_devices_t newDevice = getNewDevice(output, true /*fromCache*/);
461        setOutputDevice(output, newDevice, (newDevice != AUDIO_DEVICE_NONE));
462        if (forceVolumeReeval && (newDevice != AUDIO_DEVICE_NONE)) {
463            applyStreamVolumes(output, newDevice, 0, true);
464        }
465    }
466
467    audio_io_handle_t activeInput = getActiveInput();
468    if (activeInput != 0) {
469        AudioInputDescriptor *inputDesc = mInputs.valueFor(activeInput);
470        audio_devices_t newDevice = getDeviceForInputSource(inputDesc->mInputSource);
471        if ((newDevice != AUDIO_DEVICE_NONE) && (newDevice != inputDesc->mDevice)) {
472            ALOGV("setForceUse() changing device from %x to %x for input %d",
473                    inputDesc->mDevice, newDevice, activeInput);
474            inputDesc->mDevice = newDevice;
475            AudioParameter param = AudioParameter();
476            param.addInt(String8(AudioParameter::keyRouting), (int)newDevice);
477            mpClientInterface->setParameters(activeInput, param.toString());
478        }
479    }
480
481}
482
483AudioSystem::forced_config AudioPolicyManagerBase::getForceUse(AudioSystem::force_use usage)
484{
485    return mForceUse[usage];
486}
487
488void AudioPolicyManagerBase::setSystemProperty(const char* property, const char* value)
489{
490    ALOGV("setSystemProperty() property %s, value %s", property, value);
491}
492
493// Find a direct output profile compatible with the parameters passed, even if the input flags do
494// not explicitly request a direct output
495AudioPolicyManagerBase::IOProfile *AudioPolicyManagerBase::getProfileForDirectOutput(
496                                                               audio_devices_t device,
497                                                               uint32_t samplingRate,
498                                                               uint32_t format,
499                                                               uint32_t channelMask,
500                                                               audio_output_flags_t flags)
501{
502    for (size_t i = 0; i < mHwModules.size(); i++) {
503        if (mHwModules[i]->mHandle == 0) {
504            continue;
505        }
506        for (size_t j = 0; j < mHwModules[i]->mOutputProfiles.size(); j++) {
507            IOProfile *profile = mHwModules[i]->mOutputProfiles[j];
508            if (flags & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) {
509                if (profile->isCompatibleProfile(device, samplingRate, format,
510                                           channelMask,
511                                           AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD)) {
512                    if (mAvailableOutputDevices & profile->mSupportedDevices) {
513                        return mHwModules[i]->mOutputProfiles[j];
514                    }
515                }
516            } else {
517                if (profile->isCompatibleProfile(device, samplingRate, format,
518                                           channelMask,
519                                           AUDIO_OUTPUT_FLAG_DIRECT)) {
520                    if (mAvailableOutputDevices & profile->mSupportedDevices) {
521                        return mHwModules[i]->mOutputProfiles[j];
522                    }
523                }
524            }
525        }
526    }
527    return 0;
528}
529
530audio_io_handle_t AudioPolicyManagerBase::getOutput(AudioSystem::stream_type stream,
531                                    uint32_t samplingRate,
532                                    uint32_t format,
533                                    uint32_t channelMask,
534                                    AudioSystem::output_flags flags,
535                                    const audio_offload_info_t *offloadInfo)
536{
537    audio_io_handle_t output = 0;
538    uint32_t latency = 0;
539    routing_strategy strategy = getStrategy((AudioSystem::stream_type)stream);
540    audio_devices_t device = getDeviceForStrategy(strategy, false /*fromCache*/);
541    ALOGV("getOutput() device %d, stream %d, samplingRate %d, format %x, channelMask %x, flags %x",
542          device, stream, samplingRate, format, channelMask, flags);
543
544#ifdef AUDIO_POLICY_TEST
545    if (mCurOutput != 0) {
546        ALOGV("getOutput() test output mCurOutput %d, samplingRate %d, format %d, channelMask %x, mDirectOutput %d",
547                mCurOutput, mTestSamplingRate, mTestFormat, mTestChannels, mDirectOutput);
548
549        if (mTestOutputs[mCurOutput] == 0) {
550            ALOGV("getOutput() opening test output");
551            AudioOutputDescriptor *outputDesc = new AudioOutputDescriptor(NULL);
552            outputDesc->mDevice = mTestDevice;
553            outputDesc->mSamplingRate = mTestSamplingRate;
554            outputDesc->mFormat = mTestFormat;
555            outputDesc->mChannelMask = mTestChannels;
556            outputDesc->mLatency = mTestLatencyMs;
557            outputDesc->mFlags = (audio_output_flags_t)(mDirectOutput ? AudioSystem::OUTPUT_FLAG_DIRECT : 0);
558            outputDesc->mRefCount[stream] = 0;
559            mTestOutputs[mCurOutput] = mpClientInterface->openOutput(0, &outputDesc->mDevice,
560                                            &outputDesc->mSamplingRate,
561                                            &outputDesc->mFormat,
562                                            &outputDesc->mChannelMask,
563                                            &outputDesc->mLatency,
564                                            outputDesc->mFlags,
565                                            offloadInfo);
566            if (mTestOutputs[mCurOutput]) {
567                AudioParameter outputCmd = AudioParameter();
568                outputCmd.addInt(String8("set_id"),mCurOutput);
569                mpClientInterface->setParameters(mTestOutputs[mCurOutput],outputCmd.toString());
570                addOutput(mTestOutputs[mCurOutput], outputDesc);
571            }
572        }
573        return mTestOutputs[mCurOutput];
574    }
575#endif //AUDIO_POLICY_TEST
576
577    // open a direct output if required by specified parameters
578    //force direct flag if offload flag is set: offloading implies a direct output stream
579    // and all common behaviors are driven by checking only the direct flag
580    // this should normally be set appropriately in the policy configuration file
581    if ((flags & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) != 0) {
582        flags = (AudioSystem::output_flags)(flags | AUDIO_OUTPUT_FLAG_DIRECT);
583    }
584
585    // Do not allow offloading if one non offloadable effect is enabled. This prevents from
586    // creating an offloaded track and tearing it down immediately after start when audioflinger
587    // detects there is an active non offloadable effect.
588    // FIXME: We should check the audio session here but we do not have it in this context.
589    // This may prevent offloading in rare situations where effects are left active by apps
590    // in the background.
591    IOProfile *profile = NULL;
592    if (((flags & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) == 0) ||
593            !isNonOffloadableEffectEnabled()) {
594        profile = getProfileForDirectOutput(device,
595                                           samplingRate,
596                                           format,
597                                           channelMask,
598                                           (audio_output_flags_t)flags);
599    }
600
601    if (profile != NULL) {
602        AudioOutputDescriptor *outputDesc = NULL;
603
604        for (size_t i = 0; i < mOutputs.size(); i++) {
605            AudioOutputDescriptor *desc = mOutputs.valueAt(i);
606            if (!desc->isDuplicated() && (profile == desc->mProfile)) {
607                outputDesc = desc;
608                // reuse direct output if currently open and configured with same parameters
609                if ((samplingRate == outputDesc->mSamplingRate) &&
610                        (format == outputDesc->mFormat) &&
611                        (channelMask == outputDesc->mChannelMask)) {
612                    outputDesc->mDirectOpenCount++;
613                    ALOGV("getOutput() reusing direct output %d", mOutputs.keyAt(i));
614                    return mOutputs.keyAt(i);
615                }
616            }
617        }
618        // close direct output if currently open and configured with different parameters
619        if (outputDesc != NULL) {
620            closeOutput(outputDesc->mId);
621        }
622        outputDesc = new AudioOutputDescriptor(profile);
623        outputDesc->mDevice = device;
624        outputDesc->mSamplingRate = samplingRate;
625        outputDesc->mFormat = (audio_format_t)format;
626        outputDesc->mChannelMask = (audio_channel_mask_t)channelMask;
627        outputDesc->mLatency = 0;
628        outputDesc->mFlags =(audio_output_flags_t) (outputDesc->mFlags | flags);
629        outputDesc->mRefCount[stream] = 0;
630        outputDesc->mStopTime[stream] = 0;
631        outputDesc->mDirectOpenCount = 1;
632        output = mpClientInterface->openOutput(profile->mModule->mHandle,
633                                        &outputDesc->mDevice,
634                                        &outputDesc->mSamplingRate,
635                                        &outputDesc->mFormat,
636                                        &outputDesc->mChannelMask,
637                                        &outputDesc->mLatency,
638                                        outputDesc->mFlags,
639                                        offloadInfo);
640
641        // only accept an output with the requested parameters
642        if (output == 0 ||
643            (samplingRate != 0 && samplingRate != outputDesc->mSamplingRate) ||
644            (format != 0 && format != outputDesc->mFormat) ||
645            (channelMask != 0 && channelMask != outputDesc->mChannelMask)) {
646            ALOGV("getOutput() failed opening direct output: output %d samplingRate %d %d,"
647                    "format %d %d, channelMask %04x %04x", output, samplingRate,
648                    outputDesc->mSamplingRate, format, outputDesc->mFormat, channelMask,
649                    outputDesc->mChannelMask);
650            if (output != 0) {
651                mpClientInterface->closeOutput(output);
652            }
653            delete outputDesc;
654            return 0;
655        }
656        audio_io_handle_t srcOutput = getOutputForEffect();
657        addOutput(output, outputDesc);
658        audio_io_handle_t dstOutput = getOutputForEffect();
659        if (dstOutput == output) {
660            mpClientInterface->moveEffects(AUDIO_SESSION_OUTPUT_MIX, srcOutput, dstOutput);
661        }
662        mPreviousOutputs = mOutputs;
663        ALOGV("getOutput() returns new direct output %d", output);
664        return output;
665    }
666
667    // ignoring channel mask due to downmix capability in mixer
668
669    // open a non direct output
670
671    // for non direct outputs, only PCM is supported
672    if (audio_is_linear_pcm((audio_format_t)format)) {
673        // get which output is suitable for the specified stream. The actual
674        // routing change will happen when startOutput() will be called
675        SortedVector<audio_io_handle_t> outputs = getOutputsForDevice(device, mOutputs);
676
677        output = selectOutput(outputs, flags);
678    }
679    ALOGW_IF((output == 0), "getOutput() could not find output for stream %d, samplingRate %d,"
680            "format %d, channels %x, flags %x", stream, samplingRate, format, channelMask, flags);
681
682    ALOGV("getOutput() returns output %d", output);
683
684    return output;
685}
686
687audio_io_handle_t AudioPolicyManagerBase::selectOutput(const SortedVector<audio_io_handle_t>& outputs,
688                                                       AudioSystem::output_flags flags)
689{
690    // select one output among several that provide a path to a particular device or set of
691    // devices (the list was previously build by getOutputsForDevice()).
692    // The priority is as follows:
693    // 1: the output with the highest number of requested policy flags
694    // 2: the primary output
695    // 3: the first output in the list
696
697    if (outputs.size() == 0) {
698        return 0;
699    }
700    if (outputs.size() == 1) {
701        return outputs[0];
702    }
703
704    int maxCommonFlags = 0;
705    audio_io_handle_t outputFlags = 0;
706    audio_io_handle_t outputPrimary = 0;
707
708    for (size_t i = 0; i < outputs.size(); i++) {
709        AudioOutputDescriptor *outputDesc = mOutputs.valueFor(outputs[i]);
710        if (!outputDesc->isDuplicated()) {
711            int commonFlags = (int)AudioSystem::popCount(outputDesc->mProfile->mFlags & flags);
712            if (commonFlags > maxCommonFlags) {
713                outputFlags = outputs[i];
714                maxCommonFlags = commonFlags;
715                ALOGV("selectOutput() commonFlags for output %d, %04x", outputs[i], commonFlags);
716            }
717            if (outputDesc->mProfile->mFlags & AUDIO_OUTPUT_FLAG_PRIMARY) {
718                outputPrimary = outputs[i];
719            }
720        }
721    }
722
723    if (outputFlags != 0) {
724        return outputFlags;
725    }
726    if (outputPrimary != 0) {
727        return outputPrimary;
728    }
729
730    return outputs[0];
731}
732
733status_t AudioPolicyManagerBase::startOutput(audio_io_handle_t output,
734                                             AudioSystem::stream_type stream,
735                                             int session)
736{
737    ALOGV("startOutput() output %d, stream %d, session %d", output, stream, session);
738    ssize_t index = mOutputs.indexOfKey(output);
739    if (index < 0) {
740        ALOGW("startOutput() unknow output %d", output);
741        return BAD_VALUE;
742    }
743
744    AudioOutputDescriptor *outputDesc = mOutputs.valueAt(index);
745
746    // increment usage count for this stream on the requested output:
747    // NOTE that the usage count is the same for duplicated output and hardware output which is
748    // necessary for a correct control of hardware output routing by startOutput() and stopOutput()
749    outputDesc->changeRefCount(stream, 1);
750
751    if (outputDesc->mRefCount[stream] == 1) {
752        audio_devices_t newDevice = getNewDevice(output, false /*fromCache*/);
753        routing_strategy strategy = getStrategy(stream);
754        bool shouldWait = (strategy == STRATEGY_SONIFICATION) ||
755                            (strategy == STRATEGY_SONIFICATION_RESPECTFUL);
756        uint32_t waitMs = 0;
757        bool force = false;
758        for (size_t i = 0; i < mOutputs.size(); i++) {
759            AudioOutputDescriptor *desc = mOutputs.valueAt(i);
760            if (desc != outputDesc) {
761                // force a device change if any other output is managed by the same hw
762                // module and has a current device selection that differs from selected device.
763                // In this case, the audio HAL must receive the new device selection so that it can
764                // change the device currently selected by the other active output.
765                if (outputDesc->sharesHwModuleWith(desc) &&
766                    desc->device() != newDevice) {
767                    force = true;
768                }
769                // wait for audio on other active outputs to be presented when starting
770                // a notification so that audio focus effect can propagate.
771                uint32_t latency = desc->latency();
772                if (shouldWait && desc->isActive(latency * 2) && (waitMs < latency)) {
773                    waitMs = latency;
774                }
775            }
776        }
777        uint32_t muteWaitMs = setOutputDevice(output, newDevice, force);
778
779        // handle special case for sonification while in call
780        if (isInCall()) {
781            handleIncallSonification(stream, true, false);
782        }
783
784        // apply volume rules for current stream and device if necessary
785        checkAndSetVolume(stream,
786                          mStreams[stream].getVolumeIndex(newDevice),
787                          output,
788                          newDevice);
789
790        // update the outputs if starting an output with a stream that can affect notification
791        // routing
792        handleNotificationRoutingForStream(stream);
793        if (waitMs > muteWaitMs) {
794            usleep((waitMs - muteWaitMs) * 2 * 1000);
795        }
796    }
797    return NO_ERROR;
798}
799
800
801status_t AudioPolicyManagerBase::stopOutput(audio_io_handle_t output,
802                                            AudioSystem::stream_type stream,
803                                            int session)
804{
805    ALOGV("stopOutput() output %d, stream %d, session %d", output, stream, session);
806    ssize_t index = mOutputs.indexOfKey(output);
807    if (index < 0) {
808        ALOGW("stopOutput() unknow output %d", output);
809        return BAD_VALUE;
810    }
811
812    AudioOutputDescriptor *outputDesc = mOutputs.valueAt(index);
813
814    // handle special case for sonification while in call
815    if (isInCall()) {
816        handleIncallSonification(stream, false, false);
817    }
818
819    if (outputDesc->mRefCount[stream] > 0) {
820        // decrement usage count of this stream on the output
821        outputDesc->changeRefCount(stream, -1);
822        // store time at which the stream was stopped - see isStreamActive()
823        if (outputDesc->mRefCount[stream] == 0) {
824            outputDesc->mStopTime[stream] = systemTime();
825            audio_devices_t newDevice = getNewDevice(output, false /*fromCache*/);
826            // delay the device switch by twice the latency because stopOutput() is executed when
827            // the track stop() command is received and at that time the audio track buffer can
828            // still contain data that needs to be drained. The latency only covers the audio HAL
829            // and kernel buffers. Also the latency does not always include additional delay in the
830            // audio path (audio DSP, CODEC ...)
831            setOutputDevice(output, newDevice, false, outputDesc->mLatency*2);
832
833            // force restoring the device selection on other active outputs if it differs from the
834            // one being selected for this output
835            for (size_t i = 0; i < mOutputs.size(); i++) {
836                audio_io_handle_t curOutput = mOutputs.keyAt(i);
837                AudioOutputDescriptor *desc = mOutputs.valueAt(i);
838                if (curOutput != output &&
839                        desc->isActive() &&
840                        outputDesc->sharesHwModuleWith(desc) &&
841                        (newDevice != desc->device())) {
842                    setOutputDevice(curOutput,
843                                    getNewDevice(curOutput, false /*fromCache*/),
844                                    true,
845                                    outputDesc->mLatency*2);
846                }
847            }
848            // update the outputs if stopping one with a stream that can affect notification routing
849            handleNotificationRoutingForStream(stream);
850        }
851        return NO_ERROR;
852    } else {
853        ALOGW("stopOutput() refcount is already 0 for output %d", output);
854        return INVALID_OPERATION;
855    }
856}
857
858void AudioPolicyManagerBase::releaseOutput(audio_io_handle_t output)
859{
860    ALOGV("releaseOutput() %d", output);
861    ssize_t index = mOutputs.indexOfKey(output);
862    if (index < 0) {
863        ALOGW("releaseOutput() releasing unknown output %d", output);
864        return;
865    }
866
867#ifdef AUDIO_POLICY_TEST
868    int testIndex = testOutputIndex(output);
869    if (testIndex != 0) {
870        AudioOutputDescriptor *outputDesc = mOutputs.valueAt(index);
871        if (outputDesc->isActive()) {
872            mpClientInterface->closeOutput(output);
873            delete mOutputs.valueAt(index);
874            mOutputs.removeItem(output);
875            mTestOutputs[testIndex] = 0;
876        }
877        return;
878    }
879#endif //AUDIO_POLICY_TEST
880
881    AudioOutputDescriptor *desc = mOutputs.valueAt(index);
882    if (desc->mFlags & AudioSystem::OUTPUT_FLAG_DIRECT) {
883        if (desc->mDirectOpenCount <= 0) {
884            ALOGW("releaseOutput() invalid open count %d for output %d",
885                                                              desc->mDirectOpenCount, output);
886            return;
887        }
888        if (--desc->mDirectOpenCount == 0) {
889            closeOutput(output);
890            // If effects where present on the output, audioflinger moved them to the primary
891            // output by default: move them back to the appropriate output.
892            audio_io_handle_t dstOutput = getOutputForEffect();
893            if (dstOutput != mPrimaryOutput) {
894                mpClientInterface->moveEffects(AUDIO_SESSION_OUTPUT_MIX, mPrimaryOutput, dstOutput);
895            }
896        }
897    }
898}
899
900
901audio_io_handle_t AudioPolicyManagerBase::getInput(int inputSource,
902                                    uint32_t samplingRate,
903                                    uint32_t format,
904                                    uint32_t channelMask,
905                                    AudioSystem::audio_in_acoustics acoustics)
906{
907    audio_io_handle_t input = 0;
908    audio_devices_t device = getDeviceForInputSource(inputSource);
909
910    ALOGV("getInput() inputSource %d, samplingRate %d, format %d, channelMask %x, acoustics %x",
911          inputSource, samplingRate, format, channelMask, acoustics);
912
913    if (device == AUDIO_DEVICE_NONE) {
914        ALOGW("getInput() could not find device for inputSource %d", inputSource);
915        return 0;
916    }
917
918    // adapt channel selection to input source
919    switch(inputSource) {
920    case AUDIO_SOURCE_VOICE_UPLINK:
921        channelMask = AudioSystem::CHANNEL_IN_VOICE_UPLINK;
922        break;
923    case AUDIO_SOURCE_VOICE_DOWNLINK:
924        channelMask = AudioSystem::CHANNEL_IN_VOICE_DNLINK;
925        break;
926    case AUDIO_SOURCE_VOICE_CALL:
927        channelMask = (AudioSystem::CHANNEL_IN_VOICE_UPLINK | AudioSystem::CHANNEL_IN_VOICE_DNLINK);
928        break;
929    default:
930        break;
931    }
932
933    IOProfile *profile = getInputProfile(device,
934                                         samplingRate,
935                                         format,
936                                         channelMask);
937    if (profile == NULL) {
938        ALOGW("getInput() could not find profile for device %04x, samplingRate %d, format %d,"
939                "channelMask %04x",
940                device, samplingRate, format, channelMask);
941        return 0;
942    }
943
944    if (profile->mModule->mHandle == 0) {
945        ALOGE("getInput(): HW module %s not opened", profile->mModule->mName);
946        return 0;
947    }
948
949    AudioInputDescriptor *inputDesc = new AudioInputDescriptor(profile);
950
951    inputDesc->mInputSource = inputSource;
952    inputDesc->mDevice = device;
953    inputDesc->mSamplingRate = samplingRate;
954    inputDesc->mFormat = (audio_format_t)format;
955    inputDesc->mChannelMask = (audio_channel_mask_t)channelMask;
956    inputDesc->mRefCount = 0;
957    input = mpClientInterface->openInput(profile->mModule->mHandle,
958                                    &inputDesc->mDevice,
959                                    &inputDesc->mSamplingRate,
960                                    &inputDesc->mFormat,
961                                    &inputDesc->mChannelMask);
962
963    // only accept input with the exact requested set of parameters
964    if (input == 0 ||
965        (samplingRate != inputDesc->mSamplingRate) ||
966        (format != inputDesc->mFormat) ||
967        (channelMask != inputDesc->mChannelMask)) {
968        ALOGV("getInput() failed opening input: samplingRate %d, format %d, channelMask %d",
969                samplingRate, format, channelMask);
970        if (input != 0) {
971            mpClientInterface->closeInput(input);
972        }
973        delete inputDesc;
974        return 0;
975    }
976    mInputs.add(input, inputDesc);
977    return input;
978}
979
980status_t AudioPolicyManagerBase::startInput(audio_io_handle_t input)
981{
982    ALOGV("startInput() input %d", input);
983    ssize_t index = mInputs.indexOfKey(input);
984    if (index < 0) {
985        ALOGW("startInput() unknow input %d", input);
986        return BAD_VALUE;
987    }
988    AudioInputDescriptor *inputDesc = mInputs.valueAt(index);
989
990#ifdef AUDIO_POLICY_TEST
991    if (mTestInput == 0)
992#endif //AUDIO_POLICY_TEST
993    {
994        // refuse 2 active AudioRecord clients at the same time except if the active input
995        // uses AUDIO_SOURCE_HOTWORD in which case it is closed.
996        audio_io_handle_t activeInput = getActiveInput();
997        if (!isVirtualInputDevice(inputDesc->mDevice) && activeInput != 0) {
998            AudioInputDescriptor *activeDesc = mInputs.valueFor(activeInput);
999            if (activeDesc->mInputSource == AUDIO_SOURCE_HOTWORD) {
1000                ALOGW("startInput() preempting already started low-priority input %d", activeInput);
1001                stopInput(activeInput);
1002                releaseInput(activeInput);
1003            } else {
1004                ALOGW("startInput() input %d failed: other input already started..", input);
1005                return INVALID_OPERATION;
1006            }
1007        }
1008    }
1009
1010    audio_devices_t newDevice = getDeviceForInputSource(inputDesc->mInputSource);
1011    if ((newDevice != AUDIO_DEVICE_NONE) && (newDevice != inputDesc->mDevice)) {
1012        inputDesc->mDevice = newDevice;
1013    }
1014
1015    // automatically enable the remote submix output when input is started
1016    if (audio_is_remote_submix_device(inputDesc->mDevice)) {
1017        setDeviceConnectionState(AUDIO_DEVICE_OUT_REMOTE_SUBMIX,
1018                AudioSystem::DEVICE_STATE_AVAILABLE, AUDIO_REMOTE_SUBMIX_DEVICE_ADDRESS);
1019    }
1020
1021    AudioParameter param = AudioParameter();
1022    param.addInt(String8(AudioParameter::keyRouting), (int)inputDesc->mDevice);
1023
1024    int aliasSource = (inputDesc->mInputSource == AUDIO_SOURCE_HOTWORD) ?
1025                                        AUDIO_SOURCE_VOICE_RECOGNITION : inputDesc->mInputSource;
1026
1027    param.addInt(String8(AudioParameter::keyInputSource), aliasSource);
1028    ALOGV("AudioPolicyManager::startInput() input source = %d", inputDesc->mInputSource);
1029
1030    mpClientInterface->setParameters(input, param.toString());
1031
1032    inputDesc->mRefCount = 1;
1033    return NO_ERROR;
1034}
1035
1036status_t AudioPolicyManagerBase::stopInput(audio_io_handle_t input)
1037{
1038    ALOGV("stopInput() input %d", input);
1039    ssize_t index = mInputs.indexOfKey(input);
1040    if (index < 0) {
1041        ALOGW("stopInput() unknow input %d", input);
1042        return BAD_VALUE;
1043    }
1044    AudioInputDescriptor *inputDesc = mInputs.valueAt(index);
1045
1046    if (inputDesc->mRefCount == 0) {
1047        ALOGW("stopInput() input %d already stopped", input);
1048        return INVALID_OPERATION;
1049    } else {
1050        // automatically disable the remote submix output when input is stopped
1051        if (audio_is_remote_submix_device(inputDesc->mDevice)) {
1052            setDeviceConnectionState(AUDIO_DEVICE_OUT_REMOTE_SUBMIX,
1053                    AudioSystem::DEVICE_STATE_UNAVAILABLE, AUDIO_REMOTE_SUBMIX_DEVICE_ADDRESS);
1054        }
1055
1056        AudioParameter param = AudioParameter();
1057        param.addInt(String8(AudioParameter::keyRouting), 0);
1058        mpClientInterface->setParameters(input, param.toString());
1059        inputDesc->mRefCount = 0;
1060        return NO_ERROR;
1061    }
1062}
1063
1064void AudioPolicyManagerBase::releaseInput(audio_io_handle_t input)
1065{
1066    ALOGV("releaseInput() %d", input);
1067    ssize_t index = mInputs.indexOfKey(input);
1068    if (index < 0) {
1069        ALOGW("releaseInput() releasing unknown input %d", input);
1070        return;
1071    }
1072    mpClientInterface->closeInput(input);
1073    delete mInputs.valueAt(index);
1074    mInputs.removeItem(input);
1075    ALOGV("releaseInput() exit");
1076}
1077
1078void AudioPolicyManagerBase::initStreamVolume(AudioSystem::stream_type stream,
1079                                            int indexMin,
1080                                            int indexMax)
1081{
1082    ALOGV("initStreamVolume() stream %d, min %d, max %d", stream , indexMin, indexMax);
1083    if (indexMin < 0 || indexMin >= indexMax) {
1084        ALOGW("initStreamVolume() invalid index limits for stream %d, min %d, max %d", stream , indexMin, indexMax);
1085        return;
1086    }
1087    mStreams[stream].mIndexMin = indexMin;
1088    mStreams[stream].mIndexMax = indexMax;
1089}
1090
1091status_t AudioPolicyManagerBase::setStreamVolumeIndex(AudioSystem::stream_type stream,
1092                                                      int index,
1093                                                      audio_devices_t device)
1094{
1095
1096    if ((index < mStreams[stream].mIndexMin) || (index > mStreams[stream].mIndexMax)) {
1097        return BAD_VALUE;
1098    }
1099    if (!audio_is_output_device(device)) {
1100        return BAD_VALUE;
1101    }
1102
1103    // Force max volume if stream cannot be muted
1104    if (!mStreams[stream].mCanBeMuted) index = mStreams[stream].mIndexMax;
1105
1106    ALOGV("setStreamVolumeIndex() stream %d, device %04x, index %d",
1107          stream, device, index);
1108
1109    // if device is AUDIO_DEVICE_OUT_DEFAULT set default value and
1110    // clear all device specific values
1111    if (device == AUDIO_DEVICE_OUT_DEFAULT) {
1112        mStreams[stream].mIndexCur.clear();
1113    }
1114    mStreams[stream].mIndexCur.add(device, index);
1115
1116    // compute and apply stream volume on all outputs according to connected device
1117    status_t status = NO_ERROR;
1118    for (size_t i = 0; i < mOutputs.size(); i++) {
1119        audio_devices_t curDevice =
1120                getDeviceForVolume(mOutputs.valueAt(i)->device());
1121        if ((device == AUDIO_DEVICE_OUT_DEFAULT) || (device == curDevice)) {
1122            status_t volStatus = checkAndSetVolume(stream, index, mOutputs.keyAt(i), curDevice);
1123            if (volStatus != NO_ERROR) {
1124                status = volStatus;
1125            }
1126        }
1127    }
1128    return status;
1129}
1130
1131status_t AudioPolicyManagerBase::getStreamVolumeIndex(AudioSystem::stream_type stream,
1132                                                      int *index,
1133                                                      audio_devices_t device)
1134{
1135    if (index == NULL) {
1136        return BAD_VALUE;
1137    }
1138    if (!audio_is_output_device(device)) {
1139        return BAD_VALUE;
1140    }
1141    // if device is AUDIO_DEVICE_OUT_DEFAULT, return volume for device corresponding to
1142    // the strategy the stream belongs to.
1143    if (device == AUDIO_DEVICE_OUT_DEFAULT) {
1144        device = getDeviceForStrategy(getStrategy(stream), true /*fromCache*/);
1145    }
1146    device = getDeviceForVolume(device);
1147
1148    *index =  mStreams[stream].getVolumeIndex(device);
1149    ALOGV("getStreamVolumeIndex() stream %d device %08x index %d", stream, device, *index);
1150    return NO_ERROR;
1151}
1152
1153audio_io_handle_t AudioPolicyManagerBase::selectOutputForEffects(
1154                                            const SortedVector<audio_io_handle_t>& outputs)
1155{
1156    // select one output among several suitable for global effects.
1157    // The priority is as follows:
1158    // 1: An offloaded output. If the effect ends up not being offloadable,
1159    //    AudioFlinger will invalidate the track and the offloaded output
1160    //    will be closed causing the effect to be moved to a PCM output.
1161    // 2: A deep buffer output
1162    // 3: the first output in the list
1163
1164    if (outputs.size() == 0) {
1165        return 0;
1166    }
1167
1168    audio_io_handle_t outputOffloaded = 0;
1169    audio_io_handle_t outputDeepBuffer = 0;
1170
1171    for (size_t i = 0; i < outputs.size(); i++) {
1172        AudioOutputDescriptor *desc = mOutputs.valueFor(outputs[i]);
1173        ALOGV("selectOutputForEffects outputs[%d] flags %x", i, desc->mFlags);
1174        if ((desc->mFlags & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) != 0) {
1175            outputOffloaded = outputs[i];
1176        }
1177        if ((desc->mFlags & AUDIO_OUTPUT_FLAG_DEEP_BUFFER) != 0) {
1178            outputDeepBuffer = outputs[i];
1179        }
1180    }
1181
1182    ALOGV("selectOutputForEffects outputOffloaded %d outputDeepBuffer %d",
1183          outputOffloaded, outputDeepBuffer);
1184    if (outputOffloaded != 0) {
1185        return outputOffloaded;
1186    }
1187    if (outputDeepBuffer != 0) {
1188        return outputDeepBuffer;
1189    }
1190
1191    return outputs[0];
1192}
1193
1194audio_io_handle_t AudioPolicyManagerBase::getOutputForEffect(const effect_descriptor_t *desc)
1195{
1196    // apply simple rule where global effects are attached to the same output as MUSIC streams
1197
1198    routing_strategy strategy = getStrategy(AudioSystem::MUSIC);
1199    audio_devices_t device = getDeviceForStrategy(strategy, false /*fromCache*/);
1200    SortedVector<audio_io_handle_t> dstOutputs = getOutputsForDevice(device, mOutputs);
1201
1202    audio_io_handle_t output = selectOutputForEffects(dstOutputs);
1203    ALOGV("getOutputForEffect() got output %d for fx %s flags %x",
1204          output, (desc == NULL) ? "unspecified" : desc->name,  (desc == NULL) ? 0 : desc->flags);
1205
1206    return output;
1207}
1208
1209status_t AudioPolicyManagerBase::registerEffect(const effect_descriptor_t *desc,
1210                                audio_io_handle_t io,
1211                                uint32_t strategy,
1212                                int session,
1213                                int id)
1214{
1215    ssize_t index = mOutputs.indexOfKey(io);
1216    if (index < 0) {
1217        index = mInputs.indexOfKey(io);
1218        if (index < 0) {
1219            ALOGW("registerEffect() unknown io %d", io);
1220            return INVALID_OPERATION;
1221        }
1222    }
1223
1224    if (mTotalEffectsMemory + desc->memoryUsage > getMaxEffectsMemory()) {
1225        ALOGW("registerEffect() memory limit exceeded for Fx %s, Memory %d KB",
1226                desc->name, desc->memoryUsage);
1227        return INVALID_OPERATION;
1228    }
1229    mTotalEffectsMemory += desc->memoryUsage;
1230    ALOGV("registerEffect() effect %s, io %d, strategy %d session %d id %d",
1231            desc->name, io, strategy, session, id);
1232    ALOGV("registerEffect() memory %d, total memory %d", desc->memoryUsage, mTotalEffectsMemory);
1233
1234    EffectDescriptor *pDesc = new EffectDescriptor();
1235    memcpy (&pDesc->mDesc, desc, sizeof(effect_descriptor_t));
1236    pDesc->mIo = io;
1237    pDesc->mStrategy = (routing_strategy)strategy;
1238    pDesc->mSession = session;
1239    pDesc->mEnabled = false;
1240
1241    mEffects.add(id, pDesc);
1242
1243    return NO_ERROR;
1244}
1245
1246status_t AudioPolicyManagerBase::unregisterEffect(int id)
1247{
1248    ssize_t index = mEffects.indexOfKey(id);
1249    if (index < 0) {
1250        ALOGW("unregisterEffect() unknown effect ID %d", id);
1251        return INVALID_OPERATION;
1252    }
1253
1254    EffectDescriptor *pDesc = mEffects.valueAt(index);
1255
1256    setEffectEnabled(pDesc, false);
1257
1258    if (mTotalEffectsMemory < pDesc->mDesc.memoryUsage) {
1259        ALOGW("unregisterEffect() memory %d too big for total %d",
1260                pDesc->mDesc.memoryUsage, mTotalEffectsMemory);
1261        pDesc->mDesc.memoryUsage = mTotalEffectsMemory;
1262    }
1263    mTotalEffectsMemory -= pDesc->mDesc.memoryUsage;
1264    ALOGV("unregisterEffect() effect %s, ID %d, memory %d total memory %d",
1265            pDesc->mDesc.name, id, pDesc->mDesc.memoryUsage, mTotalEffectsMemory);
1266
1267    mEffects.removeItem(id);
1268    delete pDesc;
1269
1270    return NO_ERROR;
1271}
1272
1273status_t AudioPolicyManagerBase::setEffectEnabled(int id, bool enabled)
1274{
1275    ssize_t index = mEffects.indexOfKey(id);
1276    if (index < 0) {
1277        ALOGW("unregisterEffect() unknown effect ID %d", id);
1278        return INVALID_OPERATION;
1279    }
1280
1281    return setEffectEnabled(mEffects.valueAt(index), enabled);
1282}
1283
1284status_t AudioPolicyManagerBase::setEffectEnabled(EffectDescriptor *pDesc, bool enabled)
1285{
1286    if (enabled == pDesc->mEnabled) {
1287        ALOGV("setEffectEnabled(%s) effect already %s",
1288             enabled?"true":"false", enabled?"enabled":"disabled");
1289        return INVALID_OPERATION;
1290    }
1291
1292    if (enabled) {
1293        if (mTotalEffectsCpuLoad + pDesc->mDesc.cpuLoad > getMaxEffectsCpuLoad()) {
1294            ALOGW("setEffectEnabled(true) CPU Load limit exceeded for Fx %s, CPU %f MIPS",
1295                 pDesc->mDesc.name, (float)pDesc->mDesc.cpuLoad/10);
1296            return INVALID_OPERATION;
1297        }
1298        mTotalEffectsCpuLoad += pDesc->mDesc.cpuLoad;
1299        ALOGV("setEffectEnabled(true) total CPU %d", mTotalEffectsCpuLoad);
1300    } else {
1301        if (mTotalEffectsCpuLoad < pDesc->mDesc.cpuLoad) {
1302            ALOGW("setEffectEnabled(false) CPU load %d too high for total %d",
1303                    pDesc->mDesc.cpuLoad, mTotalEffectsCpuLoad);
1304            pDesc->mDesc.cpuLoad = mTotalEffectsCpuLoad;
1305        }
1306        mTotalEffectsCpuLoad -= pDesc->mDesc.cpuLoad;
1307        ALOGV("setEffectEnabled(false) total CPU %d", mTotalEffectsCpuLoad);
1308    }
1309    pDesc->mEnabled = enabled;
1310    return NO_ERROR;
1311}
1312
1313bool AudioPolicyManagerBase::isNonOffloadableEffectEnabled()
1314{
1315    for (size_t i = 0; i < mEffects.size(); i++) {
1316        const EffectDescriptor * const pDesc = mEffects.valueAt(i);
1317        if (pDesc->mEnabled && (pDesc->mStrategy == STRATEGY_MEDIA) &&
1318                ((pDesc->mDesc.flags & EFFECT_FLAG_OFFLOAD_SUPPORTED) == 0)) {
1319            ALOGV("isNonOffloadableEffectEnabled() non offloadable effect %s enabled on session %d",
1320                  pDesc->mDesc.name, pDesc->mSession);
1321            return true;
1322        }
1323    }
1324    return false;
1325}
1326
1327bool AudioPolicyManagerBase::isStreamActive(int stream, uint32_t inPastMs) const
1328{
1329    nsecs_t sysTime = systemTime();
1330    for (size_t i = 0; i < mOutputs.size(); i++) {
1331        const AudioOutputDescriptor *outputDesc = mOutputs.valueAt(i);
1332        if (outputDesc->isStreamActive((AudioSystem::stream_type)stream, inPastMs, sysTime)) {
1333            return true;
1334        }
1335    }
1336    return false;
1337}
1338
1339bool AudioPolicyManagerBase::isStreamActiveRemotely(int stream, uint32_t inPastMs) const
1340{
1341    nsecs_t sysTime = systemTime();
1342    for (size_t i = 0; i < mOutputs.size(); i++) {
1343        const AudioOutputDescriptor *outputDesc = mOutputs.valueAt(i);
1344        if (((outputDesc->device() & APM_AUDIO_OUT_DEVICE_REMOTE_ALL) != 0) &&
1345                outputDesc->isStreamActive((AudioSystem::stream_type)stream, inPastMs, sysTime)) {
1346            return true;
1347        }
1348    }
1349    return false;
1350}
1351
1352bool AudioPolicyManagerBase::isSourceActive(audio_source_t source) const
1353{
1354    for (size_t i = 0; i < mInputs.size(); i++) {
1355        const AudioInputDescriptor * inputDescriptor = mInputs.valueAt(i);
1356        if ((inputDescriptor->mInputSource == (int)source ||
1357                (source == (audio_source_t)AUDIO_SOURCE_VOICE_RECOGNITION &&
1358                 inputDescriptor->mInputSource == AUDIO_SOURCE_HOTWORD))
1359             && (inputDescriptor->mRefCount > 0)) {
1360            return true;
1361        }
1362    }
1363    return false;
1364}
1365
1366
1367status_t AudioPolicyManagerBase::dump(int fd)
1368{
1369    const size_t SIZE = 256;
1370    char buffer[SIZE];
1371    String8 result;
1372
1373    snprintf(buffer, SIZE, "\nAudioPolicyManager Dump: %p\n", this);
1374    result.append(buffer);
1375
1376    snprintf(buffer, SIZE, " Primary Output: %d\n", mPrimaryOutput);
1377    result.append(buffer);
1378    snprintf(buffer, SIZE, " A2DP device address: %s\n", mA2dpDeviceAddress.string());
1379    result.append(buffer);
1380    snprintf(buffer, SIZE, " SCO device address: %s\n", mScoDeviceAddress.string());
1381    result.append(buffer);
1382    snprintf(buffer, SIZE, " USB audio ALSA %s\n", mUsbCardAndDevice.string());
1383    result.append(buffer);
1384    snprintf(buffer, SIZE, " Output devices: %08x\n", mAvailableOutputDevices);
1385    result.append(buffer);
1386    snprintf(buffer, SIZE, " Input devices: %08x\n", mAvailableInputDevices);
1387    result.append(buffer);
1388    snprintf(buffer, SIZE, " Phone state: %d\n", mPhoneState);
1389    result.append(buffer);
1390    snprintf(buffer, SIZE, " Force use for communications %d\n", mForceUse[AudioSystem::FOR_COMMUNICATION]);
1391    result.append(buffer);
1392    snprintf(buffer, SIZE, " Force use for media %d\n", mForceUse[AudioSystem::FOR_MEDIA]);
1393    result.append(buffer);
1394    snprintf(buffer, SIZE, " Force use for record %d\n", mForceUse[AudioSystem::FOR_RECORD]);
1395    result.append(buffer);
1396    snprintf(buffer, SIZE, " Force use for dock %d\n", mForceUse[AudioSystem::FOR_DOCK]);
1397    result.append(buffer);
1398    snprintf(buffer, SIZE, " Force use for system %d\n", mForceUse[AudioSystem::FOR_SYSTEM]);
1399    result.append(buffer);
1400    write(fd, result.string(), result.size());
1401
1402
1403    snprintf(buffer, SIZE, "\nHW Modules dump:\n");
1404    write(fd, buffer, strlen(buffer));
1405    for (size_t i = 0; i < mHwModules.size(); i++) {
1406        snprintf(buffer, SIZE, "- HW Module %d:\n", i + 1);
1407        write(fd, buffer, strlen(buffer));
1408        mHwModules[i]->dump(fd);
1409    }
1410
1411    snprintf(buffer, SIZE, "\nOutputs dump:\n");
1412    write(fd, buffer, strlen(buffer));
1413    for (size_t i = 0; i < mOutputs.size(); i++) {
1414        snprintf(buffer, SIZE, "- Output %d dump:\n", mOutputs.keyAt(i));
1415        write(fd, buffer, strlen(buffer));
1416        mOutputs.valueAt(i)->dump(fd);
1417    }
1418
1419    snprintf(buffer, SIZE, "\nInputs dump:\n");
1420    write(fd, buffer, strlen(buffer));
1421    for (size_t i = 0; i < mInputs.size(); i++) {
1422        snprintf(buffer, SIZE, "- Input %d dump:\n", mInputs.keyAt(i));
1423        write(fd, buffer, strlen(buffer));
1424        mInputs.valueAt(i)->dump(fd);
1425    }
1426
1427    snprintf(buffer, SIZE, "\nStreams dump:\n");
1428    write(fd, buffer, strlen(buffer));
1429    snprintf(buffer, SIZE,
1430             " Stream  Can be muted  Index Min  Index Max  Index Cur [device : index]...\n");
1431    write(fd, buffer, strlen(buffer));
1432    for (size_t i = 0; i < AudioSystem::NUM_STREAM_TYPES; i++) {
1433        snprintf(buffer, SIZE, " %02d      ", i);
1434        write(fd, buffer, strlen(buffer));
1435        mStreams[i].dump(fd);
1436    }
1437
1438    snprintf(buffer, SIZE, "\nTotal Effects CPU: %f MIPS, Total Effects memory: %d KB\n",
1439            (float)mTotalEffectsCpuLoad/10, mTotalEffectsMemory);
1440    write(fd, buffer, strlen(buffer));
1441
1442    snprintf(buffer, SIZE, "Registered effects:\n");
1443    write(fd, buffer, strlen(buffer));
1444    for (size_t i = 0; i < mEffects.size(); i++) {
1445        snprintf(buffer, SIZE, "- Effect %d dump:\n", mEffects.keyAt(i));
1446        write(fd, buffer, strlen(buffer));
1447        mEffects.valueAt(i)->dump(fd);
1448    }
1449
1450
1451    return NO_ERROR;
1452}
1453
1454// This function checks for the parameters which can be offloaded.
1455// This can be enhanced depending on the capability of the DSP and policy
1456// of the system.
1457bool AudioPolicyManagerBase::isOffloadSupported(const audio_offload_info_t& offloadInfo)
1458{
1459    ALOGV("isOffloadSupported: SR=%u, CM=0x%x, Format=0x%x, StreamType=%d,"
1460     " BitRate=%u, duration=%lld us, has_video=%d",
1461     offloadInfo.sample_rate, offloadInfo.channel_mask,
1462     offloadInfo.format,
1463     offloadInfo.stream_type, offloadInfo.bit_rate, offloadInfo.duration_us,
1464     offloadInfo.has_video);
1465
1466    // Check if offload has been disabled
1467    char propValue[PROPERTY_VALUE_MAX];
1468    if (property_get("audio.offload.disable", propValue, "0")) {
1469        if (atoi(propValue) != 0) {
1470            ALOGV("offload disabled by audio.offload.disable=%s", propValue );
1471            return false;
1472        }
1473    }
1474
1475    // Check if stream type is music, then only allow offload as of now.
1476    if (offloadInfo.stream_type != AUDIO_STREAM_MUSIC)
1477    {
1478        ALOGV("isOffloadSupported: stream_type != MUSIC, returning false");
1479        return false;
1480    }
1481
1482    //TODO: enable audio offloading with video when ready
1483    if (offloadInfo.has_video)
1484    {
1485        ALOGV("isOffloadSupported: has_video == true, returning false");
1486        return false;
1487    }
1488
1489    //If duration is less than minimum value defined in property, return false
1490    if (property_get("audio.offload.min.duration.secs", propValue, NULL)) {
1491        if (offloadInfo.duration_us < (atoi(propValue) * 1000000 )) {
1492            ALOGV("Offload denied by duration < audio.offload.min.duration.secs(=%s)", propValue);
1493            return false;
1494        }
1495    } else if (offloadInfo.duration_us < OFFLOAD_DEFAULT_MIN_DURATION_SECS * 1000000) {
1496        ALOGV("Offload denied by duration < default min(=%u)", OFFLOAD_DEFAULT_MIN_DURATION_SECS);
1497        return false;
1498    }
1499
1500    // Do not allow offloading if one non offloadable effect is enabled. This prevents from
1501    // creating an offloaded track and tearing it down immediately after start when audioflinger
1502    // detects there is an active non offloadable effect.
1503    // FIXME: We should check the audio session here but we do not have it in this context.
1504    // This may prevent offloading in rare situations where effects are left active by apps
1505    // in the background.
1506    if (isNonOffloadableEffectEnabled()) {
1507        return false;
1508    }
1509
1510    // See if there is a profile to support this.
1511    // AUDIO_DEVICE_NONE
1512    IOProfile *profile = getProfileForDirectOutput(AUDIO_DEVICE_NONE /*ignore device */,
1513                                            offloadInfo.sample_rate,
1514                                            offloadInfo.format,
1515                                            offloadInfo.channel_mask,
1516                                            AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD);
1517    ALOGV("isOffloadSupported() profile %sfound", profile != NULL ? "" : "NOT ");
1518    return (profile != NULL);
1519}
1520
1521// ----------------------------------------------------------------------------
1522// AudioPolicyManagerBase
1523// ----------------------------------------------------------------------------
1524
1525AudioPolicyManagerBase::AudioPolicyManagerBase(AudioPolicyClientInterface *clientInterface)
1526    :
1527#ifdef AUDIO_POLICY_TEST
1528    Thread(false),
1529#endif //AUDIO_POLICY_TEST
1530    mPrimaryOutput((audio_io_handle_t)0),
1531    mAvailableOutputDevices(AUDIO_DEVICE_NONE),
1532    mPhoneState(AudioSystem::MODE_NORMAL),
1533    mLimitRingtoneVolume(false), mLastVoiceVolume(-1.0f),
1534    mTotalEffectsCpuLoad(0), mTotalEffectsMemory(0),
1535    mA2dpSuspended(false), mHasA2dp(false), mHasUsb(false), mHasRemoteSubmix(false)
1536{
1537    mpClientInterface = clientInterface;
1538
1539    for (int i = 0; i < AudioSystem::NUM_FORCE_USE; i++) {
1540        mForceUse[i] = AudioSystem::FORCE_NONE;
1541    }
1542
1543    initializeVolumeCurves();
1544
1545    mA2dpDeviceAddress = String8("");
1546    mScoDeviceAddress = String8("");
1547    mUsbCardAndDevice = String8("");
1548
1549    if (loadAudioPolicyConfig(AUDIO_POLICY_VENDOR_CONFIG_FILE) != NO_ERROR) {
1550        if (loadAudioPolicyConfig(AUDIO_POLICY_CONFIG_FILE) != NO_ERROR) {
1551            ALOGE("could not load audio policy configuration file, setting defaults");
1552            defaultAudioPolicyConfig();
1553        }
1554    }
1555
1556    // open all output streams needed to access attached devices
1557    for (size_t i = 0; i < mHwModules.size(); i++) {
1558        mHwModules[i]->mHandle = mpClientInterface->loadHwModule(mHwModules[i]->mName);
1559        if (mHwModules[i]->mHandle == 0) {
1560            ALOGW("could not open HW module %s", mHwModules[i]->mName);
1561            continue;
1562        }
1563        // open all output streams needed to access attached devices
1564        // except for direct output streams that are only opened when they are actually
1565        // required by an app.
1566        for (size_t j = 0; j < mHwModules[i]->mOutputProfiles.size(); j++)
1567        {
1568            const IOProfile *outProfile = mHwModules[i]->mOutputProfiles[j];
1569
1570            if ((outProfile->mSupportedDevices & mAttachedOutputDevices) &&
1571                    ((outProfile->mFlags & AUDIO_OUTPUT_FLAG_DIRECT) == 0)) {
1572                AudioOutputDescriptor *outputDesc = new AudioOutputDescriptor(outProfile);
1573                outputDesc->mDevice = (audio_devices_t)(mDefaultOutputDevice &
1574                                                            outProfile->mSupportedDevices);
1575                audio_io_handle_t output = mpClientInterface->openOutput(
1576                                                outProfile->mModule->mHandle,
1577                                                &outputDesc->mDevice,
1578                                                &outputDesc->mSamplingRate,
1579                                                &outputDesc->mFormat,
1580                                                &outputDesc->mChannelMask,
1581                                                &outputDesc->mLatency,
1582                                                outputDesc->mFlags);
1583                if (output == 0) {
1584                    delete outputDesc;
1585                } else {
1586                    mAvailableOutputDevices = (audio_devices_t)(mAvailableOutputDevices |
1587                                            (outProfile->mSupportedDevices & mAttachedOutputDevices));
1588                    if (mPrimaryOutput == 0 &&
1589                            outProfile->mFlags & AUDIO_OUTPUT_FLAG_PRIMARY) {
1590                        mPrimaryOutput = output;
1591                    }
1592                    addOutput(output, outputDesc);
1593                    setOutputDevice(output,
1594                                    (audio_devices_t)(mDefaultOutputDevice &
1595                                                        outProfile->mSupportedDevices),
1596                                    true);
1597                }
1598            }
1599        }
1600    }
1601
1602    ALOGE_IF((mAttachedOutputDevices & ~mAvailableOutputDevices),
1603             "Not output found for attached devices %08x",
1604             (mAttachedOutputDevices & ~mAvailableOutputDevices));
1605
1606    ALOGE_IF((mPrimaryOutput == 0), "Failed to open primary output");
1607
1608    updateDevicesAndOutputs();
1609
1610#ifdef AUDIO_POLICY_TEST
1611    if (mPrimaryOutput != 0) {
1612        AudioParameter outputCmd = AudioParameter();
1613        outputCmd.addInt(String8("set_id"), 0);
1614        mpClientInterface->setParameters(mPrimaryOutput, outputCmd.toString());
1615
1616        mTestDevice = AUDIO_DEVICE_OUT_SPEAKER;
1617        mTestSamplingRate = 44100;
1618        mTestFormat = AudioSystem::PCM_16_BIT;
1619        mTestChannels =  AudioSystem::CHANNEL_OUT_STEREO;
1620        mTestLatencyMs = 0;
1621        mCurOutput = 0;
1622        mDirectOutput = false;
1623        for (int i = 0; i < NUM_TEST_OUTPUTS; i++) {
1624            mTestOutputs[i] = 0;
1625        }
1626
1627        const size_t SIZE = 256;
1628        char buffer[SIZE];
1629        snprintf(buffer, SIZE, "AudioPolicyManagerTest");
1630        run(buffer, ANDROID_PRIORITY_AUDIO);
1631    }
1632#endif //AUDIO_POLICY_TEST
1633}
1634
1635AudioPolicyManagerBase::~AudioPolicyManagerBase()
1636{
1637#ifdef AUDIO_POLICY_TEST
1638    exit();
1639#endif //AUDIO_POLICY_TEST
1640   for (size_t i = 0; i < mOutputs.size(); i++) {
1641        mpClientInterface->closeOutput(mOutputs.keyAt(i));
1642        delete mOutputs.valueAt(i);
1643   }
1644   for (size_t i = 0; i < mInputs.size(); i++) {
1645        mpClientInterface->closeInput(mInputs.keyAt(i));
1646        delete mInputs.valueAt(i);
1647   }
1648   for (size_t i = 0; i < mHwModules.size(); i++) {
1649        delete mHwModules[i];
1650   }
1651}
1652
1653status_t AudioPolicyManagerBase::initCheck()
1654{
1655    return (mPrimaryOutput == 0) ? NO_INIT : NO_ERROR;
1656}
1657
1658#ifdef AUDIO_POLICY_TEST
1659bool AudioPolicyManagerBase::threadLoop()
1660{
1661    ALOGV("entering threadLoop()");
1662    while (!exitPending())
1663    {
1664        String8 command;
1665        int valueInt;
1666        String8 value;
1667
1668        Mutex::Autolock _l(mLock);
1669        mWaitWorkCV.waitRelative(mLock, milliseconds(50));
1670
1671        command = mpClientInterface->getParameters(0, String8("test_cmd_policy"));
1672        AudioParameter param = AudioParameter(command);
1673
1674        if (param.getInt(String8("test_cmd_policy"), valueInt) == NO_ERROR &&
1675            valueInt != 0) {
1676            ALOGV("Test command %s received", command.string());
1677            String8 target;
1678            if (param.get(String8("target"), target) != NO_ERROR) {
1679                target = "Manager";
1680            }
1681            if (param.getInt(String8("test_cmd_policy_output"), valueInt) == NO_ERROR) {
1682                param.remove(String8("test_cmd_policy_output"));
1683                mCurOutput = valueInt;
1684            }
1685            if (param.get(String8("test_cmd_policy_direct"), value) == NO_ERROR) {
1686                param.remove(String8("test_cmd_policy_direct"));
1687                if (value == "false") {
1688                    mDirectOutput = false;
1689                } else if (value == "true") {
1690                    mDirectOutput = true;
1691                }
1692            }
1693            if (param.getInt(String8("test_cmd_policy_input"), valueInt) == NO_ERROR) {
1694                param.remove(String8("test_cmd_policy_input"));
1695                mTestInput = valueInt;
1696            }
1697
1698            if (param.get(String8("test_cmd_policy_format"), value) == NO_ERROR) {
1699                param.remove(String8("test_cmd_policy_format"));
1700                int format = AudioSystem::INVALID_FORMAT;
1701                if (value == "PCM 16 bits") {
1702                    format = AudioSystem::PCM_16_BIT;
1703                } else if (value == "PCM 8 bits") {
1704                    format = AudioSystem::PCM_8_BIT;
1705                } else if (value == "Compressed MP3") {
1706                    format = AudioSystem::MP3;
1707                }
1708                if (format != AudioSystem::INVALID_FORMAT) {
1709                    if (target == "Manager") {
1710                        mTestFormat = format;
1711                    } else if (mTestOutputs[mCurOutput] != 0) {
1712                        AudioParameter outputParam = AudioParameter();
1713                        outputParam.addInt(String8("format"), format);
1714                        mpClientInterface->setParameters(mTestOutputs[mCurOutput], outputParam.toString());
1715                    }
1716                }
1717            }
1718            if (param.get(String8("test_cmd_policy_channels"), value) == NO_ERROR) {
1719                param.remove(String8("test_cmd_policy_channels"));
1720                int channels = 0;
1721
1722                if (value == "Channels Stereo") {
1723                    channels =  AudioSystem::CHANNEL_OUT_STEREO;
1724                } else if (value == "Channels Mono") {
1725                    channels =  AudioSystem::CHANNEL_OUT_MONO;
1726                }
1727                if (channels != 0) {
1728                    if (target == "Manager") {
1729                        mTestChannels = channels;
1730                    } else if (mTestOutputs[mCurOutput] != 0) {
1731                        AudioParameter outputParam = AudioParameter();
1732                        outputParam.addInt(String8("channels"), channels);
1733                        mpClientInterface->setParameters(mTestOutputs[mCurOutput], outputParam.toString());
1734                    }
1735                }
1736            }
1737            if (param.getInt(String8("test_cmd_policy_sampleRate"), valueInt) == NO_ERROR) {
1738                param.remove(String8("test_cmd_policy_sampleRate"));
1739                if (valueInt >= 0 && valueInt <= 96000) {
1740                    int samplingRate = valueInt;
1741                    if (target == "Manager") {
1742                        mTestSamplingRate = samplingRate;
1743                    } else if (mTestOutputs[mCurOutput] != 0) {
1744                        AudioParameter outputParam = AudioParameter();
1745                        outputParam.addInt(String8("sampling_rate"), samplingRate);
1746                        mpClientInterface->setParameters(mTestOutputs[mCurOutput], outputParam.toString());
1747                    }
1748                }
1749            }
1750
1751            if (param.get(String8("test_cmd_policy_reopen"), value) == NO_ERROR) {
1752                param.remove(String8("test_cmd_policy_reopen"));
1753
1754                AudioOutputDescriptor *outputDesc = mOutputs.valueFor(mPrimaryOutput);
1755                mpClientInterface->closeOutput(mPrimaryOutput);
1756
1757                audio_module_handle_t moduleHandle = outputDesc->mModule->mHandle;
1758
1759                delete mOutputs.valueFor(mPrimaryOutput);
1760                mOutputs.removeItem(mPrimaryOutput);
1761
1762                AudioOutputDescriptor *outputDesc = new AudioOutputDescriptor(NULL);
1763                outputDesc->mDevice = AUDIO_DEVICE_OUT_SPEAKER;
1764                mPrimaryOutput = mpClientInterface->openOutput(moduleHandle,
1765                                                &outputDesc->mDevice,
1766                                                &outputDesc->mSamplingRate,
1767                                                &outputDesc->mFormat,
1768                                                &outputDesc->mChannelMask,
1769                                                &outputDesc->mLatency,
1770                                                outputDesc->mFlags);
1771                if (mPrimaryOutput == 0) {
1772                    ALOGE("Failed to reopen hardware output stream, samplingRate: %d, format %d, channels %d",
1773                            outputDesc->mSamplingRate, outputDesc->mFormat, outputDesc->mChannelMask);
1774                } else {
1775                    AudioParameter outputCmd = AudioParameter();
1776                    outputCmd.addInt(String8("set_id"), 0);
1777                    mpClientInterface->setParameters(mPrimaryOutput, outputCmd.toString());
1778                    addOutput(mPrimaryOutput, outputDesc);
1779                }
1780            }
1781
1782
1783            mpClientInterface->setParameters(0, String8("test_cmd_policy="));
1784        }
1785    }
1786    return false;
1787}
1788
1789void AudioPolicyManagerBase::exit()
1790{
1791    {
1792        AutoMutex _l(mLock);
1793        requestExit();
1794        mWaitWorkCV.signal();
1795    }
1796    requestExitAndWait();
1797}
1798
1799int AudioPolicyManagerBase::testOutputIndex(audio_io_handle_t output)
1800{
1801    for (int i = 0; i < NUM_TEST_OUTPUTS; i++) {
1802        if (output == mTestOutputs[i]) return i;
1803    }
1804    return 0;
1805}
1806#endif //AUDIO_POLICY_TEST
1807
1808// ---
1809
1810void AudioPolicyManagerBase::addOutput(audio_io_handle_t id, AudioOutputDescriptor *outputDesc)
1811{
1812    outputDesc->mId = id;
1813    mOutputs.add(id, outputDesc);
1814}
1815
1816
1817status_t AudioPolicyManagerBase::checkOutputsForDevice(audio_devices_t device,
1818                                                       AudioSystem::device_connection_state state,
1819                                                       SortedVector<audio_io_handle_t>& outputs)
1820{
1821    AudioOutputDescriptor *desc;
1822
1823    if (state == AudioSystem::DEVICE_STATE_AVAILABLE) {
1824        // first list already open outputs that can be routed to this device
1825        for (size_t i = 0; i < mOutputs.size(); i++) {
1826            desc = mOutputs.valueAt(i);
1827            if (!desc->isDuplicated() && (desc->mProfile->mSupportedDevices & device)) {
1828                ALOGV("checkOutputsForDevice(): adding opened output %d", mOutputs.keyAt(i));
1829                outputs.add(mOutputs.keyAt(i));
1830            }
1831        }
1832        // then look for output profiles that can be routed to this device
1833        SortedVector<IOProfile *> profiles;
1834        for (size_t i = 0; i < mHwModules.size(); i++)
1835        {
1836            if (mHwModules[i]->mHandle == 0) {
1837                continue;
1838            }
1839            for (size_t j = 0; j < mHwModules[i]->mOutputProfiles.size(); j++)
1840            {
1841                if (mHwModules[i]->mOutputProfiles[j]->mSupportedDevices & device) {
1842                    ALOGV("checkOutputsForDevice(): adding profile %d from module %d", j, i);
1843                    profiles.add(mHwModules[i]->mOutputProfiles[j]);
1844                }
1845            }
1846        }
1847
1848        if (profiles.isEmpty() && outputs.isEmpty()) {
1849            ALOGW("checkOutputsForDevice(): No output available for device %04x", device);
1850            return BAD_VALUE;
1851        }
1852
1853        // open outputs for matching profiles if needed. Direct outputs are also opened to
1854        // query for dynamic parameters and will be closed later by setDeviceConnectionState()
1855        for (ssize_t profile_index = 0; profile_index < (ssize_t)profiles.size(); profile_index++) {
1856            IOProfile *profile = profiles[profile_index];
1857
1858            // nothing to do if one output is already opened for this profile
1859            size_t j;
1860            for (j = 0; j < mOutputs.size(); j++) {
1861                desc = mOutputs.valueAt(j);
1862                if (!desc->isDuplicated() && desc->mProfile == profile) {
1863                    break;
1864                }
1865            }
1866            if (j != mOutputs.size()) {
1867                continue;
1868            }
1869
1870            ALOGV("opening output for device %08x", device);
1871            desc = new AudioOutputDescriptor(profile);
1872            desc->mDevice = device;
1873            audio_offload_info_t offloadInfo = AUDIO_INFO_INITIALIZER;
1874            offloadInfo.sample_rate = desc->mSamplingRate;
1875            offloadInfo.format = desc->mFormat;
1876            offloadInfo.channel_mask = desc->mChannelMask;
1877
1878            audio_io_handle_t output = mpClientInterface->openOutput(profile->mModule->mHandle,
1879                                                                       &desc->mDevice,
1880                                                                       &desc->mSamplingRate,
1881                                                                       &desc->mFormat,
1882                                                                       &desc->mChannelMask,
1883                                                                       &desc->mLatency,
1884                                                                       desc->mFlags,
1885                                                                       &offloadInfo);
1886            if (output != 0) {
1887                if (desc->mFlags & AUDIO_OUTPUT_FLAG_DIRECT) {
1888                    String8 reply;
1889                    char *value;
1890                    if (profile->mSamplingRates[0] == 0) {
1891                        reply = mpClientInterface->getParameters(output,
1892                                                String8(AUDIO_PARAMETER_STREAM_SUP_SAMPLING_RATES));
1893                        ALOGV("checkOutputsForDevice() direct output sup sampling rates %s",
1894                                  reply.string());
1895                        value = strpbrk((char *)reply.string(), "=");
1896                        if (value != NULL) {
1897                            loadSamplingRates(value + 1, profile);
1898                        }
1899                    }
1900                    if (profile->mFormats[0] == 0) {
1901                        reply = mpClientInterface->getParameters(output,
1902                                                       String8(AUDIO_PARAMETER_STREAM_SUP_FORMATS));
1903                        ALOGV("checkOutputsForDevice() direct output sup formats %s",
1904                                  reply.string());
1905                        value = strpbrk((char *)reply.string(), "=");
1906                        if (value != NULL) {
1907                            loadFormats(value + 1, profile);
1908                        }
1909                    }
1910                    if (profile->mChannelMasks[0] == 0) {
1911                        reply = mpClientInterface->getParameters(output,
1912                                                      String8(AUDIO_PARAMETER_STREAM_SUP_CHANNELS));
1913                        ALOGV("checkOutputsForDevice() direct output sup channel masks %s",
1914                                  reply.string());
1915                        value = strpbrk((char *)reply.string(), "=");
1916                        if (value != NULL) {
1917                            loadOutChannels(value + 1, profile);
1918                        }
1919                    }
1920                    if (((profile->mSamplingRates[0] == 0) &&
1921                             (profile->mSamplingRates.size() < 2)) ||
1922                         ((profile->mFormats[0] == 0) &&
1923                             (profile->mFormats.size() < 2)) ||
1924                         ((profile->mFormats[0] == 0) &&
1925                             (profile->mChannelMasks.size() < 2))) {
1926                        ALOGW("checkOutputsForDevice() direct output missing param");
1927                        mpClientInterface->closeOutput(output);
1928                        output = 0;
1929                    } else {
1930                        addOutput(output, desc);
1931                    }
1932                } else {
1933                    audio_io_handle_t duplicatedOutput = 0;
1934                    // add output descriptor
1935                    addOutput(output, desc);
1936                    // set initial stream volume for device
1937                    applyStreamVolumes(output, device, 0, true);
1938
1939                    //TODO: configure audio effect output stage here
1940
1941                    // open a duplicating output thread for the new output and the primary output
1942                    duplicatedOutput = mpClientInterface->openDuplicateOutput(output,
1943                                                                              mPrimaryOutput);
1944                    if (duplicatedOutput != 0) {
1945                        // add duplicated output descriptor
1946                        AudioOutputDescriptor *dupOutputDesc = new AudioOutputDescriptor(NULL);
1947                        dupOutputDesc->mOutput1 = mOutputs.valueFor(mPrimaryOutput);
1948                        dupOutputDesc->mOutput2 = mOutputs.valueFor(output);
1949                        dupOutputDesc->mSamplingRate = desc->mSamplingRate;
1950                        dupOutputDesc->mFormat = desc->mFormat;
1951                        dupOutputDesc->mChannelMask = desc->mChannelMask;
1952                        dupOutputDesc->mLatency = desc->mLatency;
1953                        addOutput(duplicatedOutput, dupOutputDesc);
1954                        applyStreamVolumes(duplicatedOutput, device, 0, true);
1955                    } else {
1956                        ALOGW("checkOutputsForDevice() could not open dup output for %d and %d",
1957                                mPrimaryOutput, output);
1958                        mpClientInterface->closeOutput(output);
1959                        mOutputs.removeItem(output);
1960                        output = 0;
1961                    }
1962                }
1963            }
1964            if (output == 0) {
1965                ALOGW("checkOutputsForDevice() could not open output for device %x", device);
1966                delete desc;
1967                profiles.removeAt(profile_index);
1968                profile_index--;
1969            } else {
1970                outputs.add(output);
1971                ALOGV("checkOutputsForDevice(): adding output %d", output);
1972            }
1973        }
1974
1975        if (profiles.isEmpty()) {
1976            ALOGW("checkOutputsForDevice(): No output available for device %04x", device);
1977            return BAD_VALUE;
1978        }
1979    } else {
1980        // check if one opened output is not needed any more after disconnecting one device
1981        for (size_t i = 0; i < mOutputs.size(); i++) {
1982            desc = mOutputs.valueAt(i);
1983            if (!desc->isDuplicated() &&
1984                    !(desc->mProfile->mSupportedDevices & mAvailableOutputDevices)) {
1985                ALOGV("checkOutputsForDevice(): disconnecting adding output %d", mOutputs.keyAt(i));
1986                outputs.add(mOutputs.keyAt(i));
1987            }
1988        }
1989        for (size_t i = 0; i < mHwModules.size(); i++)
1990        {
1991            if (mHwModules[i]->mHandle == 0) {
1992                continue;
1993            }
1994            for (size_t j = 0; j < mHwModules[i]->mOutputProfiles.size(); j++)
1995            {
1996                IOProfile *profile = mHwModules[i]->mOutputProfiles[j];
1997                if ((profile->mSupportedDevices & device) &&
1998                        (profile->mFlags & AUDIO_OUTPUT_FLAG_DIRECT)) {
1999                    ALOGV("checkOutputsForDevice(): clearing direct output profile %d on module %d",
2000                          j, i);
2001                    if (profile->mSamplingRates[0] == 0) {
2002                        profile->mSamplingRates.clear();
2003                        profile->mSamplingRates.add(0);
2004                    }
2005                    if (profile->mFormats[0] == 0) {
2006                        profile->mFormats.clear();
2007                        profile->mFormats.add((audio_format_t)0);
2008                    }
2009                    if (profile->mChannelMasks[0] == 0) {
2010                        profile->mChannelMasks.clear();
2011                        profile->mChannelMasks.add((audio_channel_mask_t)0);
2012                    }
2013                }
2014            }
2015        }
2016    }
2017    return NO_ERROR;
2018}
2019
2020void AudioPolicyManagerBase::closeOutput(audio_io_handle_t output)
2021{
2022    ALOGV("closeOutput(%d)", output);
2023
2024    AudioOutputDescriptor *outputDesc = mOutputs.valueFor(output);
2025    if (outputDesc == NULL) {
2026        ALOGW("closeOutput() unknown output %d", output);
2027        return;
2028    }
2029
2030    // look for duplicated outputs connected to the output being removed.
2031    for (size_t i = 0; i < mOutputs.size(); i++) {
2032        AudioOutputDescriptor *dupOutputDesc = mOutputs.valueAt(i);
2033        if (dupOutputDesc->isDuplicated() &&
2034                (dupOutputDesc->mOutput1 == outputDesc ||
2035                dupOutputDesc->mOutput2 == outputDesc)) {
2036            AudioOutputDescriptor *outputDesc2;
2037            if (dupOutputDesc->mOutput1 == outputDesc) {
2038                outputDesc2 = dupOutputDesc->mOutput2;
2039            } else {
2040                outputDesc2 = dupOutputDesc->mOutput1;
2041            }
2042            // As all active tracks on duplicated output will be deleted,
2043            // and as they were also referenced on the other output, the reference
2044            // count for their stream type must be adjusted accordingly on
2045            // the other output.
2046            for (int j = 0; j < (int)AudioSystem::NUM_STREAM_TYPES; j++) {
2047                int refCount = dupOutputDesc->mRefCount[j];
2048                outputDesc2->changeRefCount((AudioSystem::stream_type)j,-refCount);
2049            }
2050            audio_io_handle_t duplicatedOutput = mOutputs.keyAt(i);
2051            ALOGV("closeOutput() closing also duplicated output %d", duplicatedOutput);
2052
2053            mpClientInterface->closeOutput(duplicatedOutput);
2054            delete mOutputs.valueFor(duplicatedOutput);
2055            mOutputs.removeItem(duplicatedOutput);
2056        }
2057    }
2058
2059    AudioParameter param;
2060    param.add(String8("closing"), String8("true"));
2061    mpClientInterface->setParameters(output, param.toString());
2062
2063    mpClientInterface->closeOutput(output);
2064    delete outputDesc;
2065    mOutputs.removeItem(output);
2066    mPreviousOutputs = mOutputs;
2067}
2068
2069SortedVector<audio_io_handle_t> AudioPolicyManagerBase::getOutputsForDevice(audio_devices_t device,
2070                        DefaultKeyedVector<audio_io_handle_t, AudioOutputDescriptor *> openOutputs)
2071{
2072    SortedVector<audio_io_handle_t> outputs;
2073
2074    ALOGVV("getOutputsForDevice() device %04x", device);
2075    for (size_t i = 0; i < openOutputs.size(); i++) {
2076        ALOGVV("output %d isDuplicated=%d device=%04x",
2077                i, openOutputs.valueAt(i)->isDuplicated(), openOutputs.valueAt(i)->supportedDevices());
2078        if ((device & openOutputs.valueAt(i)->supportedDevices()) == device) {
2079            ALOGVV("getOutputsForDevice() found output %d", openOutputs.keyAt(i));
2080            outputs.add(openOutputs.keyAt(i));
2081        }
2082    }
2083    return outputs;
2084}
2085
2086bool AudioPolicyManagerBase::vectorsEqual(SortedVector<audio_io_handle_t>& outputs1,
2087                                   SortedVector<audio_io_handle_t>& outputs2)
2088{
2089    if (outputs1.size() != outputs2.size()) {
2090        return false;
2091    }
2092    for (size_t i = 0; i < outputs1.size(); i++) {
2093        if (outputs1[i] != outputs2[i]) {
2094            return false;
2095        }
2096    }
2097    return true;
2098}
2099
2100void AudioPolicyManagerBase::checkOutputForStrategy(routing_strategy strategy)
2101{
2102    audio_devices_t oldDevice = getDeviceForStrategy(strategy, true /*fromCache*/);
2103    audio_devices_t newDevice = getDeviceForStrategy(strategy, false /*fromCache*/);
2104    SortedVector<audio_io_handle_t> srcOutputs = getOutputsForDevice(oldDevice, mPreviousOutputs);
2105    SortedVector<audio_io_handle_t> dstOutputs = getOutputsForDevice(newDevice, mOutputs);
2106
2107    if (!vectorsEqual(srcOutputs,dstOutputs)) {
2108        ALOGV("checkOutputForStrategy() strategy %d, moving from output %d to output %d",
2109              strategy, srcOutputs[0], dstOutputs[0]);
2110        // mute strategy while moving tracks from one output to another
2111        for (size_t i = 0; i < srcOutputs.size(); i++) {
2112            AudioOutputDescriptor *desc = mOutputs.valueFor(srcOutputs[i]);
2113            if (desc->isStrategyActive(strategy)) {
2114                setStrategyMute(strategy, true, srcOutputs[i]);
2115                setStrategyMute(strategy, false, srcOutputs[i], MUTE_TIME_MS, newDevice);
2116            }
2117        }
2118
2119        // Move effects associated to this strategy from previous output to new output
2120        if (strategy == STRATEGY_MEDIA) {
2121            audio_io_handle_t fxOutput = selectOutputForEffects(dstOutputs);
2122            SortedVector<audio_io_handle_t> moved;
2123            for (size_t i = 0; i < mEffects.size(); i++) {
2124                EffectDescriptor *desc = mEffects.valueAt(i);
2125                if (desc->mSession == AUDIO_SESSION_OUTPUT_MIX &&
2126                        desc->mIo != fxOutput) {
2127                    if (moved.indexOf(desc->mIo) < 0) {
2128                        ALOGV("checkOutputForStrategy() moving effect %d to output %d",
2129                              mEffects.keyAt(i), fxOutput);
2130                        mpClientInterface->moveEffects(AUDIO_SESSION_OUTPUT_MIX, desc->mIo,
2131                                                       fxOutput);
2132                        moved.add(desc->mIo);
2133                    }
2134                    desc->mIo = fxOutput;
2135                }
2136            }
2137        }
2138        // Move tracks associated to this strategy from previous output to new output
2139        for (int i = 0; i < (int)AudioSystem::NUM_STREAM_TYPES; i++) {
2140            if (getStrategy((AudioSystem::stream_type)i) == strategy) {
2141                //FIXME see fixme on name change
2142                mpClientInterface->setStreamOutput((AudioSystem::stream_type)i,
2143                                                   dstOutputs[0] /* ignored */);
2144            }
2145        }
2146    }
2147}
2148
2149void AudioPolicyManagerBase::checkOutputForAllStrategies()
2150{
2151    checkOutputForStrategy(STRATEGY_ENFORCED_AUDIBLE);
2152    checkOutputForStrategy(STRATEGY_PHONE);
2153    checkOutputForStrategy(STRATEGY_SONIFICATION);
2154    checkOutputForStrategy(STRATEGY_SONIFICATION_RESPECTFUL);
2155    checkOutputForStrategy(STRATEGY_MEDIA);
2156    checkOutputForStrategy(STRATEGY_DTMF);
2157}
2158
2159audio_io_handle_t AudioPolicyManagerBase::getA2dpOutput()
2160{
2161    if (!mHasA2dp) {
2162        return 0;
2163    }
2164
2165    for (size_t i = 0; i < mOutputs.size(); i++) {
2166        AudioOutputDescriptor *outputDesc = mOutputs.valueAt(i);
2167        if (!outputDesc->isDuplicated() && outputDesc->device() & AUDIO_DEVICE_OUT_ALL_A2DP) {
2168            return mOutputs.keyAt(i);
2169        }
2170    }
2171
2172    return 0;
2173}
2174
2175void AudioPolicyManagerBase::checkA2dpSuspend()
2176{
2177    if (!mHasA2dp) {
2178        return;
2179    }
2180    audio_io_handle_t a2dpOutput = getA2dpOutput();
2181    if (a2dpOutput == 0) {
2182        return;
2183    }
2184
2185    // suspend A2DP output if:
2186    //      (NOT already suspended) &&
2187    //      ((SCO device is connected &&
2188    //       (forced usage for communication || for record is SCO))) ||
2189    //      (phone state is ringing || in call)
2190    //
2191    // restore A2DP output if:
2192    //      (Already suspended) &&
2193    //      ((SCO device is NOT connected ||
2194    //       (forced usage NOT for communication && NOT for record is SCO))) &&
2195    //      (phone state is NOT ringing && NOT in call)
2196    //
2197    if (mA2dpSuspended) {
2198        if (((mScoDeviceAddress == "") ||
2199             ((mForceUse[AudioSystem::FOR_COMMUNICATION] != AudioSystem::FORCE_BT_SCO) &&
2200              (mForceUse[AudioSystem::FOR_RECORD] != AudioSystem::FORCE_BT_SCO))) &&
2201             ((mPhoneState != AudioSystem::MODE_IN_CALL) &&
2202              (mPhoneState != AudioSystem::MODE_RINGTONE))) {
2203
2204            mpClientInterface->restoreOutput(a2dpOutput);
2205            mA2dpSuspended = false;
2206        }
2207    } else {
2208        if (((mScoDeviceAddress != "") &&
2209             ((mForceUse[AudioSystem::FOR_COMMUNICATION] == AudioSystem::FORCE_BT_SCO) ||
2210              (mForceUse[AudioSystem::FOR_RECORD] == AudioSystem::FORCE_BT_SCO))) ||
2211             ((mPhoneState == AudioSystem::MODE_IN_CALL) ||
2212              (mPhoneState == AudioSystem::MODE_RINGTONE))) {
2213
2214            mpClientInterface->suspendOutput(a2dpOutput);
2215            mA2dpSuspended = true;
2216        }
2217    }
2218}
2219
2220audio_devices_t AudioPolicyManagerBase::getNewDevice(audio_io_handle_t output, bool fromCache)
2221{
2222    audio_devices_t device = AUDIO_DEVICE_NONE;
2223
2224    AudioOutputDescriptor *outputDesc = mOutputs.valueFor(output);
2225    // check the following by order of priority to request a routing change if necessary:
2226    // 1: the strategy enforced audible is active on the output:
2227    //      use device for strategy enforced audible
2228    // 2: we are in call or the strategy phone is active on the output:
2229    //      use device for strategy phone
2230    // 3: the strategy sonification is active on the output:
2231    //      use device for strategy sonification
2232    // 4: the strategy "respectful" sonification is active on the output:
2233    //      use device for strategy "respectful" sonification
2234    // 5: the strategy media is active on the output:
2235    //      use device for strategy media
2236    // 6: the strategy DTMF is active on the output:
2237    //      use device for strategy DTMF
2238    if (outputDesc->isStrategyActive(STRATEGY_ENFORCED_AUDIBLE)) {
2239        device = getDeviceForStrategy(STRATEGY_ENFORCED_AUDIBLE, fromCache);
2240    } else if (isInCall() ||
2241                    outputDesc->isStrategyActive(STRATEGY_PHONE)) {
2242        device = getDeviceForStrategy(STRATEGY_PHONE, fromCache);
2243    } else if (outputDesc->isStrategyActive(STRATEGY_SONIFICATION)) {
2244        device = getDeviceForStrategy(STRATEGY_SONIFICATION, fromCache);
2245    } else if (outputDesc->isStrategyActive(STRATEGY_SONIFICATION_RESPECTFUL)) {
2246        device = getDeviceForStrategy(STRATEGY_SONIFICATION_RESPECTFUL, fromCache);
2247    } else if (outputDesc->isStrategyActive(STRATEGY_MEDIA)) {
2248        device = getDeviceForStrategy(STRATEGY_MEDIA, fromCache);
2249    } else if (outputDesc->isStrategyActive(STRATEGY_DTMF)) {
2250        device = getDeviceForStrategy(STRATEGY_DTMF, fromCache);
2251    }
2252
2253    ALOGV("getNewDevice() selected device %x", device);
2254    return device;
2255}
2256
2257uint32_t AudioPolicyManagerBase::getStrategyForStream(AudioSystem::stream_type stream) {
2258    return (uint32_t)getStrategy(stream);
2259}
2260
2261audio_devices_t AudioPolicyManagerBase::getDevicesForStream(AudioSystem::stream_type stream) {
2262    audio_devices_t devices;
2263    // By checking the range of stream before calling getStrategy, we avoid
2264    // getStrategy's behavior for invalid streams.  getStrategy would do a ALOGE
2265    // and then return STRATEGY_MEDIA, but we want to return the empty set.
2266    if (stream < (AudioSystem::stream_type) 0 || stream >= AudioSystem::NUM_STREAM_TYPES) {
2267        devices = AUDIO_DEVICE_NONE;
2268    } else {
2269        AudioPolicyManagerBase::routing_strategy strategy = getStrategy(stream);
2270        devices = getDeviceForStrategy(strategy, true /*fromCache*/);
2271    }
2272    return devices;
2273}
2274
2275AudioPolicyManagerBase::routing_strategy AudioPolicyManagerBase::getStrategy(
2276        AudioSystem::stream_type stream) {
2277    // stream to strategy mapping
2278    switch (stream) {
2279    case AudioSystem::VOICE_CALL:
2280    case AudioSystem::BLUETOOTH_SCO:
2281        return STRATEGY_PHONE;
2282    case AudioSystem::RING:
2283    case AudioSystem::ALARM:
2284        return STRATEGY_SONIFICATION;
2285    case AudioSystem::NOTIFICATION:
2286        return STRATEGY_SONIFICATION_RESPECTFUL;
2287    case AudioSystem::DTMF:
2288        return STRATEGY_DTMF;
2289    default:
2290        ALOGE("unknown stream type");
2291    case AudioSystem::SYSTEM:
2292        // NOTE: SYSTEM stream uses MEDIA strategy because muting music and switching outputs
2293        // while key clicks are played produces a poor result
2294    case AudioSystem::TTS:
2295    case AudioSystem::MUSIC:
2296        return STRATEGY_MEDIA;
2297    case AudioSystem::ENFORCED_AUDIBLE:
2298        return STRATEGY_ENFORCED_AUDIBLE;
2299    }
2300}
2301
2302void AudioPolicyManagerBase::handleNotificationRoutingForStream(AudioSystem::stream_type stream) {
2303    switch(stream) {
2304    case AudioSystem::MUSIC:
2305        checkOutputForStrategy(STRATEGY_SONIFICATION_RESPECTFUL);
2306        updateDevicesAndOutputs();
2307        break;
2308    default:
2309        break;
2310    }
2311}
2312
2313audio_devices_t AudioPolicyManagerBase::getDeviceForStrategy(routing_strategy strategy,
2314                                                             bool fromCache)
2315{
2316    uint32_t device = AUDIO_DEVICE_NONE;
2317
2318    if (fromCache) {
2319        ALOGVV("getDeviceForStrategy() from cache strategy %d, device %x",
2320              strategy, mDeviceForStrategy[strategy]);
2321        return mDeviceForStrategy[strategy];
2322    }
2323
2324    switch (strategy) {
2325
2326    case STRATEGY_SONIFICATION_RESPECTFUL:
2327        if (isInCall()) {
2328            device = getDeviceForStrategy(STRATEGY_SONIFICATION, false /*fromCache*/);
2329        } else if (isStreamActiveRemotely(AudioSystem::MUSIC,
2330                SONIFICATION_RESPECTFUL_AFTER_MUSIC_DELAY)) {
2331            // while media is playing on a remote device, use the the sonification behavior.
2332            // Note that we test this usecase before testing if media is playing because
2333            //   the isStreamActive() method only informs about the activity of a stream, not
2334            //   if it's for local playback. Note also that we use the same delay between both tests
2335            device = getDeviceForStrategy(STRATEGY_SONIFICATION, false /*fromCache*/);
2336        } else if (isStreamActive(AudioSystem::MUSIC, SONIFICATION_RESPECTFUL_AFTER_MUSIC_DELAY)) {
2337            // while media is playing (or has recently played), use the same device
2338            device = getDeviceForStrategy(STRATEGY_MEDIA, false /*fromCache*/);
2339        } else {
2340            // when media is not playing anymore, fall back on the sonification behavior
2341            device = getDeviceForStrategy(STRATEGY_SONIFICATION, false /*fromCache*/);
2342        }
2343
2344        break;
2345
2346    case STRATEGY_DTMF:
2347        if (!isInCall()) {
2348            // when off call, DTMF strategy follows the same rules as MEDIA strategy
2349            device = getDeviceForStrategy(STRATEGY_MEDIA, false /*fromCache*/);
2350            break;
2351        }
2352        // when in call, DTMF and PHONE strategies follow the same rules
2353        // FALL THROUGH
2354
2355    case STRATEGY_PHONE:
2356        // for phone strategy, we first consider the forced use and then the available devices by order
2357        // of priority
2358        switch (mForceUse[AudioSystem::FOR_COMMUNICATION]) {
2359        case AudioSystem::FORCE_BT_SCO:
2360            if (!isInCall() || strategy != STRATEGY_DTMF) {
2361                device = mAvailableOutputDevices & AUDIO_DEVICE_OUT_BLUETOOTH_SCO_CARKIT;
2362                if (device) break;
2363            }
2364            device = mAvailableOutputDevices & AUDIO_DEVICE_OUT_BLUETOOTH_SCO_HEADSET;
2365            if (device) break;
2366            device = mAvailableOutputDevices & AUDIO_DEVICE_OUT_BLUETOOTH_SCO;
2367            if (device) break;
2368            // if SCO device is requested but no SCO device is available, fall back to default case
2369            // FALL THROUGH
2370
2371        default:    // FORCE_NONE
2372            // when not in a phone call, phone strategy should route STREAM_VOICE_CALL to A2DP
2373            if (mHasA2dp && !isInCall() &&
2374                    (mForceUse[AudioSystem::FOR_MEDIA] != AudioSystem::FORCE_NO_BT_A2DP) &&
2375                    (getA2dpOutput() != 0) && !mA2dpSuspended) {
2376                device = mAvailableOutputDevices & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP;
2377                if (device) break;
2378                device = mAvailableOutputDevices & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES;
2379                if (device) break;
2380            }
2381            device = mAvailableOutputDevices & AUDIO_DEVICE_OUT_WIRED_HEADPHONE;
2382            if (device) break;
2383            device = mAvailableOutputDevices & AUDIO_DEVICE_OUT_WIRED_HEADSET;
2384            if (device) break;
2385            if (mPhoneState != AudioSystem::MODE_IN_CALL) {
2386                device = mAvailableOutputDevices & AUDIO_DEVICE_OUT_USB_ACCESSORY;
2387                if (device) break;
2388                device = mAvailableOutputDevices & AUDIO_DEVICE_OUT_USB_DEVICE;
2389                if (device) break;
2390                device = mAvailableOutputDevices & AUDIO_DEVICE_OUT_DGTL_DOCK_HEADSET;
2391                if (device) break;
2392                device = mAvailableOutputDevices & AUDIO_DEVICE_OUT_AUX_DIGITAL;
2393                if (device) break;
2394                device = mAvailableOutputDevices & AUDIO_DEVICE_OUT_ANLG_DOCK_HEADSET;
2395                if (device) break;
2396            }
2397            device = mAvailableOutputDevices & AUDIO_DEVICE_OUT_EARPIECE;
2398            if (device) break;
2399            device = mDefaultOutputDevice;
2400            if (device == AUDIO_DEVICE_NONE) {
2401                ALOGE("getDeviceForStrategy() no device found for STRATEGY_PHONE");
2402            }
2403            break;
2404
2405        case AudioSystem::FORCE_SPEAKER:
2406            // when not in a phone call, phone strategy should route STREAM_VOICE_CALL to
2407            // A2DP speaker when forcing to speaker output
2408            if (mHasA2dp && !isInCall() &&
2409                    (mForceUse[AudioSystem::FOR_MEDIA] != AudioSystem::FORCE_NO_BT_A2DP) &&
2410                    (getA2dpOutput() != 0) && !mA2dpSuspended) {
2411                device = mAvailableOutputDevices & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_SPEAKER;
2412                if (device) break;
2413            }
2414            if (mPhoneState != AudioSystem::MODE_IN_CALL) {
2415                device = mAvailableOutputDevices & AUDIO_DEVICE_OUT_USB_ACCESSORY;
2416                if (device) break;
2417                device = mAvailableOutputDevices & AUDIO_DEVICE_OUT_USB_DEVICE;
2418                if (device) break;
2419                device = mAvailableOutputDevices & AUDIO_DEVICE_OUT_DGTL_DOCK_HEADSET;
2420                if (device) break;
2421                device = mAvailableOutputDevices & AUDIO_DEVICE_OUT_AUX_DIGITAL;
2422                if (device) break;
2423                device = mAvailableOutputDevices & AUDIO_DEVICE_OUT_ANLG_DOCK_HEADSET;
2424                if (device) break;
2425            }
2426            device = mAvailableOutputDevices & AUDIO_DEVICE_OUT_SPEAKER;
2427            if (device) break;
2428            device = mDefaultOutputDevice;
2429            if (device == AUDIO_DEVICE_NONE) {
2430                ALOGE("getDeviceForStrategy() no device found for STRATEGY_PHONE, FORCE_SPEAKER");
2431            }
2432            break;
2433        }
2434    break;
2435
2436    case STRATEGY_SONIFICATION:
2437
2438        // If incall, just select the STRATEGY_PHONE device: The rest of the behavior is handled by
2439        // handleIncallSonification().
2440        if (isInCall()) {
2441            device = getDeviceForStrategy(STRATEGY_PHONE, false /*fromCache*/);
2442            break;
2443        }
2444        // FALL THROUGH
2445
2446    case STRATEGY_ENFORCED_AUDIBLE:
2447        // strategy STRATEGY_ENFORCED_AUDIBLE uses same routing policy as STRATEGY_SONIFICATION
2448        // except:
2449        //   - when in call where it doesn't default to STRATEGY_PHONE behavior
2450        //   - in countries where not enforced in which case it follows STRATEGY_MEDIA
2451
2452        if ((strategy == STRATEGY_SONIFICATION) ||
2453                (mForceUse[AudioSystem::FOR_SYSTEM] == AudioSystem::FORCE_SYSTEM_ENFORCED)) {
2454            device = mAvailableOutputDevices & AUDIO_DEVICE_OUT_SPEAKER;
2455            if (device == AUDIO_DEVICE_NONE) {
2456                ALOGE("getDeviceForStrategy() speaker device not found for STRATEGY_SONIFICATION");
2457            }
2458        }
2459        // The second device used for sonification is the same as the device used by media strategy
2460        // FALL THROUGH
2461
2462    case STRATEGY_MEDIA: {
2463        uint32_t device2 = AUDIO_DEVICE_NONE;
2464        if (strategy != STRATEGY_SONIFICATION) {
2465            // no sonification on remote submix (e.g. WFD)
2466            device2 = mAvailableOutputDevices & AUDIO_DEVICE_OUT_REMOTE_SUBMIX;
2467        }
2468        if ((device2 == AUDIO_DEVICE_NONE) &&
2469                mHasA2dp && (mForceUse[AudioSystem::FOR_MEDIA] != AudioSystem::FORCE_NO_BT_A2DP) &&
2470                (getA2dpOutput() != 0) && !mA2dpSuspended) {
2471            device2 = mAvailableOutputDevices & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP;
2472            if (device2 == AUDIO_DEVICE_NONE) {
2473                device2 = mAvailableOutputDevices & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES;
2474            }
2475            if (device2 == AUDIO_DEVICE_NONE) {
2476                device2 = mAvailableOutputDevices & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_SPEAKER;
2477            }
2478        }
2479        if (device2 == AUDIO_DEVICE_NONE) {
2480            device2 = mAvailableOutputDevices & AUDIO_DEVICE_OUT_WIRED_HEADPHONE;
2481        }
2482        if (device2 == AUDIO_DEVICE_NONE) {
2483            device2 = mAvailableOutputDevices & AUDIO_DEVICE_OUT_WIRED_HEADSET;
2484        }
2485        if (device2 == AUDIO_DEVICE_NONE) {
2486            device2 = mAvailableOutputDevices & AUDIO_DEVICE_OUT_USB_ACCESSORY;
2487        }
2488        if (device2 == AUDIO_DEVICE_NONE) {
2489            device2 = mAvailableOutputDevices & AUDIO_DEVICE_OUT_USB_DEVICE;
2490        }
2491        if (device2 == AUDIO_DEVICE_NONE) {
2492            device2 = mAvailableOutputDevices & AUDIO_DEVICE_OUT_DGTL_DOCK_HEADSET;
2493        }
2494        if ((device2 == AUDIO_DEVICE_NONE) && (strategy != STRATEGY_SONIFICATION)) {
2495            // no sonification on aux digital (e.g. HDMI)
2496            device2 = mAvailableOutputDevices & AUDIO_DEVICE_OUT_AUX_DIGITAL;
2497        }
2498        if ((device2 == AUDIO_DEVICE_NONE) &&
2499                (mForceUse[AudioSystem::FOR_DOCK] == AudioSystem::FORCE_ANALOG_DOCK)) {
2500            device2 = mAvailableOutputDevices & AUDIO_DEVICE_OUT_ANLG_DOCK_HEADSET;
2501        }
2502        if (device2 == AUDIO_DEVICE_NONE) {
2503            device2 = mAvailableOutputDevices & AUDIO_DEVICE_OUT_SPEAKER;
2504        }
2505
2506        // device is DEVICE_OUT_SPEAKER if we come from case STRATEGY_SONIFICATION or
2507        // STRATEGY_ENFORCED_AUDIBLE, AUDIO_DEVICE_NONE otherwise
2508        device |= device2;
2509        if (device) break;
2510        device = mDefaultOutputDevice;
2511        if (device == AUDIO_DEVICE_NONE) {
2512            ALOGE("getDeviceForStrategy() no device found for STRATEGY_MEDIA");
2513        }
2514        } break;
2515
2516    default:
2517        ALOGW("getDeviceForStrategy() unknown strategy: %d", strategy);
2518        break;
2519    }
2520
2521    ALOGVV("getDeviceForStrategy() strategy %d, device %x", strategy, device);
2522    return device;
2523}
2524
2525void AudioPolicyManagerBase::updateDevicesAndOutputs()
2526{
2527    for (int i = 0; i < NUM_STRATEGIES; i++) {
2528        mDeviceForStrategy[i] = getDeviceForStrategy((routing_strategy)i, false /*fromCache*/);
2529    }
2530    mPreviousOutputs = mOutputs;
2531}
2532
2533uint32_t AudioPolicyManagerBase::checkDeviceMuteStrategies(AudioOutputDescriptor *outputDesc,
2534                                                       audio_devices_t prevDevice,
2535                                                       uint32_t delayMs)
2536{
2537    // mute/unmute strategies using an incompatible device combination
2538    // if muting, wait for the audio in pcm buffer to be drained before proceeding
2539    // if unmuting, unmute only after the specified delay
2540    if (outputDesc->isDuplicated()) {
2541        return 0;
2542    }
2543
2544    uint32_t muteWaitMs = 0;
2545    audio_devices_t device = outputDesc->device();
2546    bool shouldMute = outputDesc->isActive() && (AudioSystem::popCount(device) >= 2);
2547    // temporary mute output if device selection changes to avoid volume bursts due to
2548    // different per device volumes
2549    bool tempMute = outputDesc->isActive() && (device != prevDevice);
2550
2551    for (size_t i = 0; i < NUM_STRATEGIES; i++) {
2552        audio_devices_t curDevice = getDeviceForStrategy((routing_strategy)i, false /*fromCache*/);
2553        bool mute = shouldMute && (curDevice & device) && (curDevice != device);
2554        bool doMute = false;
2555
2556        if (mute && !outputDesc->mStrategyMutedByDevice[i]) {
2557            doMute = true;
2558            outputDesc->mStrategyMutedByDevice[i] = true;
2559        } else if (!mute && outputDesc->mStrategyMutedByDevice[i]){
2560            doMute = true;
2561            outputDesc->mStrategyMutedByDevice[i] = false;
2562        }
2563        if (doMute || tempMute) {
2564            for (size_t j = 0; j < mOutputs.size(); j++) {
2565                AudioOutputDescriptor *desc = mOutputs.valueAt(j);
2566                // skip output if it does not share any device with current output
2567                if ((desc->supportedDevices() & outputDesc->supportedDevices())
2568                        == AUDIO_DEVICE_NONE) {
2569                    continue;
2570                }
2571                audio_io_handle_t curOutput = mOutputs.keyAt(j);
2572                ALOGVV("checkDeviceMuteStrategies() %s strategy %d (curDevice %04x) on output %d",
2573                      mute ? "muting" : "unmuting", i, curDevice, curOutput);
2574                setStrategyMute((routing_strategy)i, mute, curOutput, mute ? 0 : delayMs);
2575                if (desc->isStrategyActive((routing_strategy)i)) {
2576                    // do tempMute only for current output
2577                    if (tempMute && (desc == outputDesc)) {
2578                        setStrategyMute((routing_strategy)i, true, curOutput);
2579                        setStrategyMute((routing_strategy)i, false, curOutput,
2580                                            desc->latency() * 2, device);
2581                    }
2582                    if ((tempMute && (desc == outputDesc)) || mute) {
2583                        if (muteWaitMs < desc->latency()) {
2584                            muteWaitMs = desc->latency();
2585                        }
2586                    }
2587                }
2588            }
2589        }
2590    }
2591
2592    // FIXME: should not need to double latency if volume could be applied immediately by the
2593    // audioflinger mixer. We must account for the delay between now and the next time
2594    // the audioflinger thread for this output will process a buffer (which corresponds to
2595    // one buffer size, usually 1/2 or 1/4 of the latency).
2596    muteWaitMs *= 2;
2597    // wait for the PCM output buffers to empty before proceeding with the rest of the command
2598    if (muteWaitMs > delayMs) {
2599        muteWaitMs -= delayMs;
2600        usleep(muteWaitMs * 1000);
2601        return muteWaitMs;
2602    }
2603    return 0;
2604}
2605
2606uint32_t AudioPolicyManagerBase::setOutputDevice(audio_io_handle_t output,
2607                                             audio_devices_t device,
2608                                             bool force,
2609                                             int delayMs)
2610{
2611    ALOGV("setOutputDevice() output %d device %04x delayMs %d", output, device, delayMs);
2612    AudioOutputDescriptor *outputDesc = mOutputs.valueFor(output);
2613    AudioParameter param;
2614    uint32_t muteWaitMs;
2615
2616    if (outputDesc->isDuplicated()) {
2617        muteWaitMs = setOutputDevice(outputDesc->mOutput1->mId, device, force, delayMs);
2618        muteWaitMs += setOutputDevice(outputDesc->mOutput2->mId, device, force, delayMs);
2619        return muteWaitMs;
2620    }
2621    // no need to proceed if new device is not AUDIO_DEVICE_NONE and not supported by current
2622    // output profile
2623    if ((device != AUDIO_DEVICE_NONE) &&
2624            ((device & outputDesc->mProfile->mSupportedDevices) == 0)) {
2625        return 0;
2626    }
2627
2628    // filter devices according to output selected
2629    device = (audio_devices_t)(device & outputDesc->mProfile->mSupportedDevices);
2630
2631    audio_devices_t prevDevice = outputDesc->mDevice;
2632
2633    ALOGV("setOutputDevice() prevDevice %04x", prevDevice);
2634
2635    if (device != AUDIO_DEVICE_NONE) {
2636        outputDesc->mDevice = device;
2637    }
2638    muteWaitMs = checkDeviceMuteStrategies(outputDesc, prevDevice, delayMs);
2639
2640    // Do not change the routing if:
2641    //  - the requested device is AUDIO_DEVICE_NONE
2642    //  - the requested device is the same as current device and force is not specified.
2643    // Doing this check here allows the caller to call setOutputDevice() without conditions
2644    if ((device == AUDIO_DEVICE_NONE || device == prevDevice) && !force) {
2645        ALOGV("setOutputDevice() setting same device %04x or null device for output %d", device, output);
2646        return muteWaitMs;
2647    }
2648
2649    ALOGV("setOutputDevice() changing device");
2650    // do the routing
2651    param.addInt(String8(AudioParameter::keyRouting), (int)device);
2652    mpClientInterface->setParameters(output, param.toString(), delayMs);
2653
2654    // update stream volumes according to new device
2655    applyStreamVolumes(output, device, delayMs);
2656
2657    return muteWaitMs;
2658}
2659
2660AudioPolicyManagerBase::IOProfile *AudioPolicyManagerBase::getInputProfile(audio_devices_t device,
2661                                                   uint32_t samplingRate,
2662                                                   uint32_t format,
2663                                                   uint32_t channelMask)
2664{
2665    // Choose an input profile based on the requested capture parameters: select the first available
2666    // profile supporting all requested parameters.
2667
2668    for (size_t i = 0; i < mHwModules.size(); i++)
2669    {
2670        if (mHwModules[i]->mHandle == 0) {
2671            continue;
2672        }
2673        for (size_t j = 0; j < mHwModules[i]->mInputProfiles.size(); j++)
2674        {
2675            IOProfile *profile = mHwModules[i]->mInputProfiles[j];
2676            if (profile->isCompatibleProfile(device, samplingRate, format,
2677                                             channelMask,(audio_output_flags_t)0)) {
2678                return profile;
2679            }
2680        }
2681    }
2682    return NULL;
2683}
2684
2685audio_devices_t AudioPolicyManagerBase::getDeviceForInputSource(int inputSource)
2686{
2687    uint32_t device = AUDIO_DEVICE_NONE;
2688
2689    switch (inputSource) {
2690    case AUDIO_SOURCE_VOICE_UPLINK:
2691      if (mAvailableInputDevices & AUDIO_DEVICE_IN_VOICE_CALL) {
2692          device = AUDIO_DEVICE_IN_VOICE_CALL;
2693          break;
2694      }
2695      // FALL THROUGH
2696
2697    case AUDIO_SOURCE_DEFAULT:
2698    case AUDIO_SOURCE_MIC:
2699    case AUDIO_SOURCE_VOICE_RECOGNITION:
2700    case AUDIO_SOURCE_HOTWORD:
2701    case AUDIO_SOURCE_VOICE_COMMUNICATION:
2702        if (mForceUse[AudioSystem::FOR_RECORD] == AudioSystem::FORCE_BT_SCO &&
2703            mAvailableInputDevices & AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET) {
2704            device = AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET;
2705        } else if (mAvailableInputDevices & AUDIO_DEVICE_IN_WIRED_HEADSET) {
2706            device = AUDIO_DEVICE_IN_WIRED_HEADSET;
2707        } else if (mAvailableInputDevices & AUDIO_DEVICE_IN_BUILTIN_MIC) {
2708            device = AUDIO_DEVICE_IN_BUILTIN_MIC;
2709        }
2710        break;
2711    case AUDIO_SOURCE_CAMCORDER:
2712        if (mAvailableInputDevices & AUDIO_DEVICE_IN_BACK_MIC) {
2713            device = AUDIO_DEVICE_IN_BACK_MIC;
2714        } else if (mAvailableInputDevices & AUDIO_DEVICE_IN_BUILTIN_MIC) {
2715            device = AUDIO_DEVICE_IN_BUILTIN_MIC;
2716        }
2717        break;
2718    case AUDIO_SOURCE_VOICE_DOWNLINK:
2719    case AUDIO_SOURCE_VOICE_CALL:
2720        if (mAvailableInputDevices & AUDIO_DEVICE_IN_VOICE_CALL) {
2721            device = AUDIO_DEVICE_IN_VOICE_CALL;
2722        }
2723        break;
2724    case AUDIO_SOURCE_REMOTE_SUBMIX:
2725        if (mAvailableInputDevices & AUDIO_DEVICE_IN_REMOTE_SUBMIX) {
2726            device = AUDIO_DEVICE_IN_REMOTE_SUBMIX;
2727        }
2728        break;
2729    default:
2730        ALOGW("getDeviceForInputSource() invalid input source %d", inputSource);
2731        break;
2732    }
2733    ALOGV("getDeviceForInputSource()input source %d, device %08x", inputSource, device);
2734    return device;
2735}
2736
2737bool AudioPolicyManagerBase::isVirtualInputDevice(audio_devices_t device)
2738{
2739    if ((device & AUDIO_DEVICE_BIT_IN) != 0) {
2740        device &= ~AUDIO_DEVICE_BIT_IN;
2741        if ((popcount(device) == 1) && ((device & ~APM_AUDIO_IN_DEVICE_VIRTUAL_ALL) == 0))
2742            return true;
2743    }
2744    return false;
2745}
2746
2747audio_io_handle_t AudioPolicyManagerBase::getActiveInput(bool ignoreVirtualInputs)
2748{
2749    for (size_t i = 0; i < mInputs.size(); i++) {
2750        const AudioInputDescriptor * input_descriptor = mInputs.valueAt(i);
2751        if ((input_descriptor->mRefCount > 0)
2752                && (!ignoreVirtualInputs || !isVirtualInputDevice(input_descriptor->mDevice))) {
2753            return mInputs.keyAt(i);
2754        }
2755    }
2756    return 0;
2757}
2758
2759
2760audio_devices_t AudioPolicyManagerBase::getDeviceForVolume(audio_devices_t device)
2761{
2762    if (device == AUDIO_DEVICE_NONE) {
2763        // this happens when forcing a route update and no track is active on an output.
2764        // In this case the returned category is not important.
2765        device =  AUDIO_DEVICE_OUT_SPEAKER;
2766    } else if (AudioSystem::popCount(device) > 1) {
2767        // Multiple device selection is either:
2768        //  - speaker + one other device: give priority to speaker in this case.
2769        //  - one A2DP device + another device: happens with duplicated output. In this case
2770        // retain the device on the A2DP output as the other must not correspond to an active
2771        // selection if not the speaker.
2772        if (device & AUDIO_DEVICE_OUT_SPEAKER) {
2773            device = AUDIO_DEVICE_OUT_SPEAKER;
2774        } else {
2775            device = (audio_devices_t)(device & AUDIO_DEVICE_OUT_ALL_A2DP);
2776        }
2777    }
2778
2779    ALOGW_IF(AudioSystem::popCount(device) != 1,
2780            "getDeviceForVolume() invalid device combination: %08x",
2781            device);
2782
2783    return device;
2784}
2785
2786AudioPolicyManagerBase::device_category AudioPolicyManagerBase::getDeviceCategory(audio_devices_t device)
2787{
2788    switch(getDeviceForVolume(device)) {
2789        case AUDIO_DEVICE_OUT_EARPIECE:
2790            return DEVICE_CATEGORY_EARPIECE;
2791        case AUDIO_DEVICE_OUT_WIRED_HEADSET:
2792        case AUDIO_DEVICE_OUT_WIRED_HEADPHONE:
2793        case AUDIO_DEVICE_OUT_BLUETOOTH_SCO:
2794        case AUDIO_DEVICE_OUT_BLUETOOTH_SCO_HEADSET:
2795        case AUDIO_DEVICE_OUT_BLUETOOTH_A2DP:
2796        case AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES:
2797            return DEVICE_CATEGORY_HEADSET;
2798        case AUDIO_DEVICE_OUT_SPEAKER:
2799        case AUDIO_DEVICE_OUT_BLUETOOTH_SCO_CARKIT:
2800        case AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_SPEAKER:
2801        case AUDIO_DEVICE_OUT_AUX_DIGITAL:
2802        case AUDIO_DEVICE_OUT_USB_ACCESSORY:
2803        case AUDIO_DEVICE_OUT_USB_DEVICE:
2804        case AUDIO_DEVICE_OUT_REMOTE_SUBMIX:
2805        default:
2806            return DEVICE_CATEGORY_SPEAKER;
2807    }
2808}
2809
2810float AudioPolicyManagerBase::volIndexToAmpl(audio_devices_t device, const StreamDescriptor& streamDesc,
2811        int indexInUi)
2812{
2813    device_category deviceCategory = getDeviceCategory(device);
2814    const VolumeCurvePoint *curve = streamDesc.mVolumeCurve[deviceCategory];
2815
2816    // the volume index in the UI is relative to the min and max volume indices for this stream type
2817    int nbSteps = 1 + curve[VOLMAX].mIndex -
2818            curve[VOLMIN].mIndex;
2819    int volIdx = (nbSteps * (indexInUi - streamDesc.mIndexMin)) /
2820            (streamDesc.mIndexMax - streamDesc.mIndexMin);
2821
2822    // find what part of the curve this index volume belongs to, or if it's out of bounds
2823    int segment = 0;
2824    if (volIdx < curve[VOLMIN].mIndex) {         // out of bounds
2825        return 0.0f;
2826    } else if (volIdx < curve[VOLKNEE1].mIndex) {
2827        segment = 0;
2828    } else if (volIdx < curve[VOLKNEE2].mIndex) {
2829        segment = 1;
2830    } else if (volIdx <= curve[VOLMAX].mIndex) {
2831        segment = 2;
2832    } else {                                                               // out of bounds
2833        return 1.0f;
2834    }
2835
2836    // linear interpolation in the attenuation table in dB
2837    float decibels = curve[segment].mDBAttenuation +
2838            ((float)(volIdx - curve[segment].mIndex)) *
2839                ( (curve[segment+1].mDBAttenuation -
2840                        curve[segment].mDBAttenuation) /
2841                    ((float)(curve[segment+1].mIndex -
2842                            curve[segment].mIndex)) );
2843
2844    float amplification = exp( decibels * 0.115129f); // exp( dB * ln(10) / 20 )
2845
2846    ALOGVV("VOLUME vol index=[%d %d %d], dB=[%.1f %.1f %.1f] ampl=%.5f",
2847            curve[segment].mIndex, volIdx,
2848            curve[segment+1].mIndex,
2849            curve[segment].mDBAttenuation,
2850            decibels,
2851            curve[segment+1].mDBAttenuation,
2852            amplification);
2853
2854    return amplification;
2855}
2856
2857const AudioPolicyManagerBase::VolumeCurvePoint
2858    AudioPolicyManagerBase::sDefaultVolumeCurve[AudioPolicyManagerBase::VOLCNT] = {
2859    {1, -49.5f}, {33, -33.5f}, {66, -17.0f}, {100, 0.0f}
2860};
2861
2862const AudioPolicyManagerBase::VolumeCurvePoint
2863    AudioPolicyManagerBase::sDefaultMediaVolumeCurve[AudioPolicyManagerBase::VOLCNT] = {
2864    {1, -58.0f}, {20, -40.0f}, {60, -17.0f}, {100, 0.0f}
2865};
2866
2867const AudioPolicyManagerBase::VolumeCurvePoint
2868    AudioPolicyManagerBase::sSpeakerMediaVolumeCurve[AudioPolicyManagerBase::VOLCNT] = {
2869    {1, -56.0f}, {20, -34.0f}, {60, -11.0f}, {100, 0.0f}
2870};
2871
2872const AudioPolicyManagerBase::VolumeCurvePoint
2873    AudioPolicyManagerBase::sSpeakerSonificationVolumeCurve[AudioPolicyManagerBase::VOLCNT] = {
2874    {1, -29.7f}, {33, -20.1f}, {66, -10.2f}, {100, 0.0f}
2875};
2876
2877// AUDIO_STREAM_SYSTEM, AUDIO_STREAM_ENFORCED_AUDIBLE and AUDIO_STREAM_DTMF volume tracks
2878// AUDIO_STREAM_RING on phones and AUDIO_STREAM_MUSIC on tablets.
2879// AUDIO_STREAM_DTMF tracks AUDIO_STREAM_VOICE_CALL while in call (See AudioService.java).
2880// The range is constrained between -24dB and -6dB over speaker and -30dB and -18dB over headset.
2881
2882const AudioPolicyManagerBase::VolumeCurvePoint
2883    AudioPolicyManagerBase::sDefaultSystemVolumeCurve[AudioPolicyManagerBase::VOLCNT] = {
2884    {1, -24.0f}, {33, -18.0f}, {66, -12.0f}, {100, -6.0f}
2885};
2886
2887const AudioPolicyManagerBase::VolumeCurvePoint
2888    AudioPolicyManagerBase::sHeadsetSystemVolumeCurve[AudioPolicyManagerBase::VOLCNT] = {
2889    {1, -30.0f}, {33, -26.0f}, {66, -22.0f}, {100, -18.0f}
2890};
2891
2892const AudioPolicyManagerBase::VolumeCurvePoint
2893    AudioPolicyManagerBase::sDefaultVoiceVolumeCurve[AudioPolicyManagerBase::VOLCNT] = {
2894    {0, -42.0f}, {33, -28.0f}, {66, -14.0f}, {100, 0.0f}
2895};
2896
2897const AudioPolicyManagerBase::VolumeCurvePoint
2898    AudioPolicyManagerBase::sSpeakerVoiceVolumeCurve[AudioPolicyManagerBase::VOLCNT] = {
2899    {0, -24.0f}, {33, -16.0f}, {66, -8.0f}, {100, 0.0f}
2900};
2901
2902const AudioPolicyManagerBase::VolumeCurvePoint
2903            *AudioPolicyManagerBase::sVolumeProfiles[AUDIO_STREAM_CNT]
2904                                                   [AudioPolicyManagerBase::DEVICE_CATEGORY_CNT] = {
2905    { // AUDIO_STREAM_VOICE_CALL
2906        sDefaultVoiceVolumeCurve, // DEVICE_CATEGORY_HEADSET
2907        sSpeakerVoiceVolumeCurve, // DEVICE_CATEGORY_SPEAKER
2908        sDefaultVoiceVolumeCurve  // DEVICE_CATEGORY_EARPIECE
2909    },
2910    { // AUDIO_STREAM_SYSTEM
2911        sHeadsetSystemVolumeCurve, // DEVICE_CATEGORY_HEADSET
2912        sDefaultSystemVolumeCurve, // DEVICE_CATEGORY_SPEAKER
2913        sDefaultSystemVolumeCurve  // DEVICE_CATEGORY_EARPIECE
2914    },
2915    { // AUDIO_STREAM_RING
2916        sDefaultVolumeCurve, // DEVICE_CATEGORY_HEADSET
2917        sSpeakerSonificationVolumeCurve, // DEVICE_CATEGORY_SPEAKER
2918        sDefaultVolumeCurve  // DEVICE_CATEGORY_EARPIECE
2919    },
2920    { // AUDIO_STREAM_MUSIC
2921        sDefaultMediaVolumeCurve, // DEVICE_CATEGORY_HEADSET
2922        sSpeakerMediaVolumeCurve, // DEVICE_CATEGORY_SPEAKER
2923        sDefaultMediaVolumeCurve  // DEVICE_CATEGORY_EARPIECE
2924    },
2925    { // AUDIO_STREAM_ALARM
2926        sDefaultVolumeCurve, // DEVICE_CATEGORY_HEADSET
2927        sSpeakerSonificationVolumeCurve, // DEVICE_CATEGORY_SPEAKER
2928        sDefaultVolumeCurve  // DEVICE_CATEGORY_EARPIECE
2929    },
2930    { // AUDIO_STREAM_NOTIFICATION
2931        sDefaultVolumeCurve, // DEVICE_CATEGORY_HEADSET
2932        sSpeakerSonificationVolumeCurve, // DEVICE_CATEGORY_SPEAKER
2933        sDefaultVolumeCurve  // DEVICE_CATEGORY_EARPIECE
2934    },
2935    { // AUDIO_STREAM_BLUETOOTH_SCO
2936        sDefaultVoiceVolumeCurve, // DEVICE_CATEGORY_HEADSET
2937        sSpeakerVoiceVolumeCurve, // DEVICE_CATEGORY_SPEAKER
2938        sDefaultVoiceVolumeCurve  // DEVICE_CATEGORY_EARPIECE
2939    },
2940    { // AUDIO_STREAM_ENFORCED_AUDIBLE
2941        sHeadsetSystemVolumeCurve, // DEVICE_CATEGORY_HEADSET
2942        sDefaultSystemVolumeCurve, // DEVICE_CATEGORY_SPEAKER
2943        sDefaultSystemVolumeCurve  // DEVICE_CATEGORY_EARPIECE
2944    },
2945    {  // AUDIO_STREAM_DTMF
2946        sHeadsetSystemVolumeCurve, // DEVICE_CATEGORY_HEADSET
2947        sDefaultSystemVolumeCurve, // DEVICE_CATEGORY_SPEAKER
2948        sDefaultSystemVolumeCurve  // DEVICE_CATEGORY_EARPIECE
2949    },
2950    { // AUDIO_STREAM_TTS
2951        sDefaultMediaVolumeCurve, // DEVICE_CATEGORY_HEADSET
2952        sSpeakerMediaVolumeCurve, // DEVICE_CATEGORY_SPEAKER
2953        sDefaultMediaVolumeCurve  // DEVICE_CATEGORY_EARPIECE
2954    },
2955};
2956
2957void AudioPolicyManagerBase::initializeVolumeCurves()
2958{
2959    for (int i = 0; i < AUDIO_STREAM_CNT; i++) {
2960        for (int j = 0; j < DEVICE_CATEGORY_CNT; j++) {
2961            mStreams[i].mVolumeCurve[j] =
2962                    sVolumeProfiles[i][j];
2963        }
2964    }
2965}
2966
2967float AudioPolicyManagerBase::computeVolume(int stream,
2968                                            int index,
2969                                            audio_io_handle_t output,
2970                                            audio_devices_t device)
2971{
2972    float volume = 1.0;
2973    AudioOutputDescriptor *outputDesc = mOutputs.valueFor(output);
2974    StreamDescriptor &streamDesc = mStreams[stream];
2975
2976    if (device == AUDIO_DEVICE_NONE) {
2977        device = outputDesc->device();
2978    }
2979
2980    // if volume is not 0 (not muted), force media volume to max on digital output
2981    if (stream == AudioSystem::MUSIC &&
2982        index != mStreams[stream].mIndexMin &&
2983        (device == AUDIO_DEVICE_OUT_AUX_DIGITAL ||
2984         device == AUDIO_DEVICE_OUT_DGTL_DOCK_HEADSET ||
2985         device == AUDIO_DEVICE_OUT_USB_ACCESSORY ||
2986         device == AUDIO_DEVICE_OUT_USB_DEVICE)) {
2987        return 1.0;
2988    }
2989
2990    volume = volIndexToAmpl(device, streamDesc, index);
2991
2992    // if a headset is connected, apply the following rules to ring tones and notifications
2993    // to avoid sound level bursts in user's ears:
2994    // - always attenuate ring tones and notifications volume by 6dB
2995    // - if music is playing, always limit the volume to current music volume,
2996    // with a minimum threshold at -36dB so that notification is always perceived.
2997    const routing_strategy stream_strategy = getStrategy((AudioSystem::stream_type)stream);
2998    if ((device & (AUDIO_DEVICE_OUT_BLUETOOTH_A2DP |
2999            AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES |
3000            AUDIO_DEVICE_OUT_WIRED_HEADSET |
3001            AUDIO_DEVICE_OUT_WIRED_HEADPHONE)) &&
3002        ((stream_strategy == STRATEGY_SONIFICATION)
3003                || (stream_strategy == STRATEGY_SONIFICATION_RESPECTFUL)
3004                || (stream == AudioSystem::SYSTEM)
3005                || ((stream_strategy == STRATEGY_ENFORCED_AUDIBLE) &&
3006                    (mForceUse[AudioSystem::FOR_SYSTEM] == AudioSystem::FORCE_NONE))) &&
3007        streamDesc.mCanBeMuted) {
3008        volume *= SONIFICATION_HEADSET_VOLUME_FACTOR;
3009        // when the phone is ringing we must consider that music could have been paused just before
3010        // by the music application and behave as if music was active if the last music track was
3011        // just stopped
3012        if (isStreamActive(AudioSystem::MUSIC, SONIFICATION_HEADSET_MUSIC_DELAY) ||
3013                mLimitRingtoneVolume) {
3014            audio_devices_t musicDevice = getDeviceForStrategy(STRATEGY_MEDIA, true /*fromCache*/);
3015            float musicVol = computeVolume(AudioSystem::MUSIC,
3016                               mStreams[AudioSystem::MUSIC].getVolumeIndex(musicDevice),
3017                               output,
3018                               musicDevice);
3019            float minVol = (musicVol > SONIFICATION_HEADSET_VOLUME_MIN) ?
3020                                musicVol : SONIFICATION_HEADSET_VOLUME_MIN;
3021            if (volume > minVol) {
3022                volume = minVol;
3023                ALOGV("computeVolume limiting volume to %f musicVol %f", minVol, musicVol);
3024            }
3025        }
3026    }
3027
3028    return volume;
3029}
3030
3031status_t AudioPolicyManagerBase::checkAndSetVolume(int stream,
3032                                                   int index,
3033                                                   audio_io_handle_t output,
3034                                                   audio_devices_t device,
3035                                                   int delayMs,
3036                                                   bool force)
3037{
3038
3039    // do not change actual stream volume if the stream is muted
3040    if (mOutputs.valueFor(output)->mMuteCount[stream] != 0) {
3041        ALOGVV("checkAndSetVolume() stream %d muted count %d",
3042              stream, mOutputs.valueFor(output)->mMuteCount[stream]);
3043        return NO_ERROR;
3044    }
3045
3046    // do not change in call volume if bluetooth is connected and vice versa
3047    if ((stream == AudioSystem::VOICE_CALL && mForceUse[AudioSystem::FOR_COMMUNICATION] == AudioSystem::FORCE_BT_SCO) ||
3048        (stream == AudioSystem::BLUETOOTH_SCO && mForceUse[AudioSystem::FOR_COMMUNICATION] != AudioSystem::FORCE_BT_SCO)) {
3049        ALOGV("checkAndSetVolume() cannot set stream %d volume with force use = %d for comm",
3050             stream, mForceUse[AudioSystem::FOR_COMMUNICATION]);
3051        return INVALID_OPERATION;
3052    }
3053
3054    float volume = computeVolume(stream, index, output, device);
3055    // We actually change the volume if:
3056    // - the float value returned by computeVolume() changed
3057    // - the force flag is set
3058    if (volume != mOutputs.valueFor(output)->mCurVolume[stream] ||
3059            force) {
3060        mOutputs.valueFor(output)->mCurVolume[stream] = volume;
3061        ALOGVV("checkAndSetVolume() for output %d stream %d, volume %f, delay %d", output, stream, volume, delayMs);
3062        // Force VOICE_CALL to track BLUETOOTH_SCO stream volume when bluetooth audio is
3063        // enabled
3064        if (stream == AudioSystem::BLUETOOTH_SCO) {
3065            mpClientInterface->setStreamVolume(AudioSystem::VOICE_CALL, volume, output, delayMs);
3066        }
3067        mpClientInterface->setStreamVolume((AudioSystem::stream_type)stream, volume, output, delayMs);
3068    }
3069
3070    if (stream == AudioSystem::VOICE_CALL ||
3071        stream == AudioSystem::BLUETOOTH_SCO) {
3072        float voiceVolume;
3073        // Force voice volume to max for bluetooth SCO as volume is managed by the headset
3074        if (stream == AudioSystem::VOICE_CALL) {
3075            voiceVolume = (float)index/(float)mStreams[stream].mIndexMax;
3076        } else {
3077            voiceVolume = 1.0;
3078        }
3079
3080        if (voiceVolume != mLastVoiceVolume && output == mPrimaryOutput) {
3081            mpClientInterface->setVoiceVolume(voiceVolume, delayMs);
3082            mLastVoiceVolume = voiceVolume;
3083        }
3084    }
3085
3086    return NO_ERROR;
3087}
3088
3089void AudioPolicyManagerBase::applyStreamVolumes(audio_io_handle_t output,
3090                                                audio_devices_t device,
3091                                                int delayMs,
3092                                                bool force)
3093{
3094    ALOGVV("applyStreamVolumes() for output %d and device %x", output, device);
3095
3096    for (int stream = 0; stream < AudioSystem::NUM_STREAM_TYPES; stream++) {
3097        checkAndSetVolume(stream,
3098                          mStreams[stream].getVolumeIndex(device),
3099                          output,
3100                          device,
3101                          delayMs,
3102                          force);
3103    }
3104}
3105
3106void AudioPolicyManagerBase::setStrategyMute(routing_strategy strategy,
3107                                             bool on,
3108                                             audio_io_handle_t output,
3109                                             int delayMs,
3110                                             audio_devices_t device)
3111{
3112    ALOGVV("setStrategyMute() strategy %d, mute %d, output %d", strategy, on, output);
3113    for (int stream = 0; stream < AudioSystem::NUM_STREAM_TYPES; stream++) {
3114        if (getStrategy((AudioSystem::stream_type)stream) == strategy) {
3115            setStreamMute(stream, on, output, delayMs, device);
3116        }
3117    }
3118}
3119
3120void AudioPolicyManagerBase::setStreamMute(int stream,
3121                                           bool on,
3122                                           audio_io_handle_t output,
3123                                           int delayMs,
3124                                           audio_devices_t device)
3125{
3126    StreamDescriptor &streamDesc = mStreams[stream];
3127    AudioOutputDescriptor *outputDesc = mOutputs.valueFor(output);
3128    if (device == AUDIO_DEVICE_NONE) {
3129        device = outputDesc->device();
3130    }
3131
3132    ALOGVV("setStreamMute() stream %d, mute %d, output %d, mMuteCount %d device %04x",
3133          stream, on, output, outputDesc->mMuteCount[stream], device);
3134
3135    if (on) {
3136        if (outputDesc->mMuteCount[stream] == 0) {
3137            if (streamDesc.mCanBeMuted &&
3138                    ((stream != AudioSystem::ENFORCED_AUDIBLE) ||
3139                     (mForceUse[AudioSystem::FOR_SYSTEM] == AudioSystem::FORCE_NONE))) {
3140                checkAndSetVolume(stream, 0, output, device, delayMs);
3141            }
3142        }
3143        // increment mMuteCount after calling checkAndSetVolume() so that volume change is not ignored
3144        outputDesc->mMuteCount[stream]++;
3145    } else {
3146        if (outputDesc->mMuteCount[stream] == 0) {
3147            ALOGV("setStreamMute() unmuting non muted stream!");
3148            return;
3149        }
3150        if (--outputDesc->mMuteCount[stream] == 0) {
3151            checkAndSetVolume(stream,
3152                              streamDesc.getVolumeIndex(device),
3153                              output,
3154                              device,
3155                              delayMs);
3156        }
3157    }
3158}
3159
3160void AudioPolicyManagerBase::handleIncallSonification(int stream, bool starting, bool stateChange)
3161{
3162    // if the stream pertains to sonification strategy and we are in call we must
3163    // mute the stream if it is low visibility. If it is high visibility, we must play a tone
3164    // in the device used for phone strategy and play the tone if the selected device does not
3165    // interfere with the device used for phone strategy
3166    // if stateChange is true, we are called from setPhoneState() and we must mute or unmute as
3167    // many times as there are active tracks on the output
3168    const routing_strategy stream_strategy = getStrategy((AudioSystem::stream_type)stream);
3169    if ((stream_strategy == STRATEGY_SONIFICATION) ||
3170            ((stream_strategy == STRATEGY_SONIFICATION_RESPECTFUL))) {
3171        AudioOutputDescriptor *outputDesc = mOutputs.valueFor(mPrimaryOutput);
3172        ALOGV("handleIncallSonification() stream %d starting %d device %x stateChange %d",
3173                stream, starting, outputDesc->mDevice, stateChange);
3174        if (outputDesc->mRefCount[stream]) {
3175            int muteCount = 1;
3176            if (stateChange) {
3177                muteCount = outputDesc->mRefCount[stream];
3178            }
3179            if (AudioSystem::isLowVisibility((AudioSystem::stream_type)stream)) {
3180                ALOGV("handleIncallSonification() low visibility, muteCount %d", muteCount);
3181                for (int i = 0; i < muteCount; i++) {
3182                    setStreamMute(stream, starting, mPrimaryOutput);
3183                }
3184            } else {
3185                ALOGV("handleIncallSonification() high visibility");
3186                if (outputDesc->device() &
3187                        getDeviceForStrategy(STRATEGY_PHONE, true /*fromCache*/)) {
3188                    ALOGV("handleIncallSonification() high visibility muted, muteCount %d", muteCount);
3189                    for (int i = 0; i < muteCount; i++) {
3190                        setStreamMute(stream, starting, mPrimaryOutput);
3191                    }
3192                }
3193                if (starting) {
3194                    mpClientInterface->startTone(ToneGenerator::TONE_SUP_CALL_WAITING, AudioSystem::VOICE_CALL);
3195                } else {
3196                    mpClientInterface->stopTone();
3197                }
3198            }
3199        }
3200    }
3201}
3202
3203bool AudioPolicyManagerBase::isInCall()
3204{
3205    return isStateInCall(mPhoneState);
3206}
3207
3208bool AudioPolicyManagerBase::isStateInCall(int state) {
3209    return ((state == AudioSystem::MODE_IN_CALL) ||
3210            (state == AudioSystem::MODE_IN_COMMUNICATION));
3211}
3212
3213uint32_t AudioPolicyManagerBase::getMaxEffectsCpuLoad()
3214{
3215    return MAX_EFFECTS_CPU_LOAD;
3216}
3217
3218uint32_t AudioPolicyManagerBase::getMaxEffectsMemory()
3219{
3220    return MAX_EFFECTS_MEMORY;
3221}
3222
3223// --- AudioOutputDescriptor class implementation
3224
3225AudioPolicyManagerBase::AudioOutputDescriptor::AudioOutputDescriptor(
3226        const IOProfile *profile)
3227    : mId(0), mSamplingRate(0), mFormat((audio_format_t)0),
3228      mChannelMask((audio_channel_mask_t)0), mLatency(0),
3229    mFlags((audio_output_flags_t)0), mDevice(AUDIO_DEVICE_NONE),
3230    mOutput1(0), mOutput2(0), mProfile(profile), mDirectOpenCount(0)
3231{
3232    // clear usage count for all stream types
3233    for (int i = 0; i < AudioSystem::NUM_STREAM_TYPES; i++) {
3234        mRefCount[i] = 0;
3235        mCurVolume[i] = -1.0;
3236        mMuteCount[i] = 0;
3237        mStopTime[i] = 0;
3238    }
3239    for (int i = 0; i < NUM_STRATEGIES; i++) {
3240        mStrategyMutedByDevice[i] = false;
3241    }
3242    if (profile != NULL) {
3243        mSamplingRate = profile->mSamplingRates[0];
3244        mFormat = profile->mFormats[0];
3245        mChannelMask = profile->mChannelMasks[0];
3246        mFlags = profile->mFlags;
3247    }
3248}
3249
3250audio_devices_t AudioPolicyManagerBase::AudioOutputDescriptor::device() const
3251{
3252    if (isDuplicated()) {
3253        return (audio_devices_t)(mOutput1->mDevice | mOutput2->mDevice);
3254    } else {
3255        return mDevice;
3256    }
3257}
3258
3259uint32_t AudioPolicyManagerBase::AudioOutputDescriptor::latency()
3260{
3261    if (isDuplicated()) {
3262        return (mOutput1->mLatency > mOutput2->mLatency) ? mOutput1->mLatency : mOutput2->mLatency;
3263    } else {
3264        return mLatency;
3265    }
3266}
3267
3268bool AudioPolicyManagerBase::AudioOutputDescriptor::sharesHwModuleWith(
3269        const AudioOutputDescriptor *outputDesc)
3270{
3271    if (isDuplicated()) {
3272        return mOutput1->sharesHwModuleWith(outputDesc) || mOutput2->sharesHwModuleWith(outputDesc);
3273    } else if (outputDesc->isDuplicated()){
3274        return sharesHwModuleWith(outputDesc->mOutput1) || sharesHwModuleWith(outputDesc->mOutput2);
3275    } else {
3276        return (mProfile->mModule == outputDesc->mProfile->mModule);
3277    }
3278}
3279
3280void AudioPolicyManagerBase::AudioOutputDescriptor::changeRefCount(AudioSystem::stream_type stream, int delta)
3281{
3282    // forward usage count change to attached outputs
3283    if (isDuplicated()) {
3284        mOutput1->changeRefCount(stream, delta);
3285        mOutput2->changeRefCount(stream, delta);
3286    }
3287    if ((delta + (int)mRefCount[stream]) < 0) {
3288        ALOGW("changeRefCount() invalid delta %d for stream %d, refCount %d", delta, stream, mRefCount[stream]);
3289        mRefCount[stream] = 0;
3290        return;
3291    }
3292    mRefCount[stream] += delta;
3293    ALOGV("changeRefCount() stream %d, count %d", stream, mRefCount[stream]);
3294}
3295
3296audio_devices_t AudioPolicyManagerBase::AudioOutputDescriptor::supportedDevices()
3297{
3298    if (isDuplicated()) {
3299        return (audio_devices_t)(mOutput1->supportedDevices() | mOutput2->supportedDevices());
3300    } else {
3301        return mProfile->mSupportedDevices ;
3302    }
3303}
3304
3305bool AudioPolicyManagerBase::AudioOutputDescriptor::isActive(uint32_t inPastMs) const
3306{
3307    return isStrategyActive(NUM_STRATEGIES, inPastMs);
3308}
3309
3310bool AudioPolicyManagerBase::AudioOutputDescriptor::isStrategyActive(routing_strategy strategy,
3311                                                                       uint32_t inPastMs,
3312                                                                       nsecs_t sysTime) const
3313{
3314    if ((sysTime == 0) && (inPastMs != 0)) {
3315        sysTime = systemTime();
3316    }
3317    for (int i = 0; i < AudioSystem::NUM_STREAM_TYPES; i++) {
3318        if (((getStrategy((AudioSystem::stream_type)i) == strategy) ||
3319                (NUM_STRATEGIES == strategy)) &&
3320                isStreamActive((AudioSystem::stream_type)i, inPastMs, sysTime)) {
3321            return true;
3322        }
3323    }
3324    return false;
3325}
3326
3327bool AudioPolicyManagerBase::AudioOutputDescriptor::isStreamActive(AudioSystem::stream_type stream,
3328                                                                       uint32_t inPastMs,
3329                                                                       nsecs_t sysTime) const
3330{
3331    if (mRefCount[stream] != 0) {
3332        return true;
3333    }
3334    if (inPastMs == 0) {
3335        return false;
3336    }
3337    if (sysTime == 0) {
3338        sysTime = systemTime();
3339    }
3340    if (ns2ms(sysTime - mStopTime[stream]) < inPastMs) {
3341        return true;
3342    }
3343    return false;
3344}
3345
3346
3347status_t AudioPolicyManagerBase::AudioOutputDescriptor::dump(int fd)
3348{
3349    const size_t SIZE = 256;
3350    char buffer[SIZE];
3351    String8 result;
3352
3353    snprintf(buffer, SIZE, " Sampling rate: %d\n", mSamplingRate);
3354    result.append(buffer);
3355    snprintf(buffer, SIZE, " Format: %08x\n", mFormat);
3356    result.append(buffer);
3357    snprintf(buffer, SIZE, " Channels: %08x\n", mChannelMask);
3358    result.append(buffer);
3359    snprintf(buffer, SIZE, " Latency: %d\n", mLatency);
3360    result.append(buffer);
3361    snprintf(buffer, SIZE, " Flags %08x\n", mFlags);
3362    result.append(buffer);
3363    snprintf(buffer, SIZE, " Devices %08x\n", device());
3364    result.append(buffer);
3365    snprintf(buffer, SIZE, " Stream volume refCount muteCount\n");
3366    result.append(buffer);
3367    for (int i = 0; i < AudioSystem::NUM_STREAM_TYPES; i++) {
3368        snprintf(buffer, SIZE, " %02d     %.03f     %02d       %02d\n", i, mCurVolume[i], mRefCount[i], mMuteCount[i]);
3369        result.append(buffer);
3370    }
3371    write(fd, result.string(), result.size());
3372
3373    return NO_ERROR;
3374}
3375
3376// --- AudioInputDescriptor class implementation
3377
3378AudioPolicyManagerBase::AudioInputDescriptor::AudioInputDescriptor(const IOProfile *profile)
3379    : mSamplingRate(0), mFormat((audio_format_t)0), mChannelMask((audio_channel_mask_t)0),
3380      mDevice(AUDIO_DEVICE_NONE), mRefCount(0),
3381      mInputSource(0), mProfile(profile)
3382{
3383}
3384
3385status_t AudioPolicyManagerBase::AudioInputDescriptor::dump(int fd)
3386{
3387    const size_t SIZE = 256;
3388    char buffer[SIZE];
3389    String8 result;
3390
3391    snprintf(buffer, SIZE, " Sampling rate: %d\n", mSamplingRate);
3392    result.append(buffer);
3393    snprintf(buffer, SIZE, " Format: %d\n", mFormat);
3394    result.append(buffer);
3395    snprintf(buffer, SIZE, " Channels: %08x\n", mChannelMask);
3396    result.append(buffer);
3397    snprintf(buffer, SIZE, " Devices %08x\n", mDevice);
3398    result.append(buffer);
3399    snprintf(buffer, SIZE, " Ref Count %d\n", mRefCount);
3400    result.append(buffer);
3401    write(fd, result.string(), result.size());
3402
3403    return NO_ERROR;
3404}
3405
3406// --- StreamDescriptor class implementation
3407
3408AudioPolicyManagerBase::StreamDescriptor::StreamDescriptor()
3409    :   mIndexMin(0), mIndexMax(1), mCanBeMuted(true)
3410{
3411    mIndexCur.add(AUDIO_DEVICE_OUT_DEFAULT, 0);
3412}
3413
3414int AudioPolicyManagerBase::StreamDescriptor::getVolumeIndex(audio_devices_t device)
3415{
3416    device = AudioPolicyManagerBase::getDeviceForVolume(device);
3417    // there is always a valid entry for AUDIO_DEVICE_OUT_DEFAULT
3418    if (mIndexCur.indexOfKey(device) < 0) {
3419        device = AUDIO_DEVICE_OUT_DEFAULT;
3420    }
3421    return mIndexCur.valueFor(device);
3422}
3423
3424void AudioPolicyManagerBase::StreamDescriptor::dump(int fd)
3425{
3426    const size_t SIZE = 256;
3427    char buffer[SIZE];
3428    String8 result;
3429
3430    snprintf(buffer, SIZE, "%s         %02d         %02d         ",
3431             mCanBeMuted ? "true " : "false", mIndexMin, mIndexMax);
3432    result.append(buffer);
3433    for (size_t i = 0; i < mIndexCur.size(); i++) {
3434        snprintf(buffer, SIZE, "%04x : %02d, ",
3435                 mIndexCur.keyAt(i),
3436                 mIndexCur.valueAt(i));
3437        result.append(buffer);
3438    }
3439    result.append("\n");
3440
3441    write(fd, result.string(), result.size());
3442}
3443
3444// --- EffectDescriptor class implementation
3445
3446status_t AudioPolicyManagerBase::EffectDescriptor::dump(int fd)
3447{
3448    const size_t SIZE = 256;
3449    char buffer[SIZE];
3450    String8 result;
3451
3452    snprintf(buffer, SIZE, " I/O: %d\n", mIo);
3453    result.append(buffer);
3454    snprintf(buffer, SIZE, " Strategy: %d\n", mStrategy);
3455    result.append(buffer);
3456    snprintf(buffer, SIZE, " Session: %d\n", mSession);
3457    result.append(buffer);
3458    snprintf(buffer, SIZE, " Name: %s\n",  mDesc.name);
3459    result.append(buffer);
3460    snprintf(buffer, SIZE, " %s\n",  mEnabled ? "Enabled" : "Disabled");
3461    result.append(buffer);
3462    write(fd, result.string(), result.size());
3463
3464    return NO_ERROR;
3465}
3466
3467// --- IOProfile class implementation
3468
3469AudioPolicyManagerBase::HwModule::HwModule(const char *name)
3470    : mName(strndup(name, AUDIO_HARDWARE_MODULE_ID_MAX_LEN)), mHandle(0)
3471{
3472}
3473
3474AudioPolicyManagerBase::HwModule::~HwModule()
3475{
3476    for (size_t i = 0; i < mOutputProfiles.size(); i++) {
3477         delete mOutputProfiles[i];
3478    }
3479    for (size_t i = 0; i < mInputProfiles.size(); i++) {
3480         delete mInputProfiles[i];
3481    }
3482    free((void *)mName);
3483}
3484
3485void AudioPolicyManagerBase::HwModule::dump(int fd)
3486{
3487    const size_t SIZE = 256;
3488    char buffer[SIZE];
3489    String8 result;
3490
3491    snprintf(buffer, SIZE, "  - name: %s\n", mName);
3492    result.append(buffer);
3493    snprintf(buffer, SIZE, "  - handle: %d\n", mHandle);
3494    result.append(buffer);
3495    write(fd, result.string(), result.size());
3496    if (mOutputProfiles.size()) {
3497        write(fd, "  - outputs:\n", sizeof("  - outputs:\n"));
3498        for (size_t i = 0; i < mOutputProfiles.size(); i++) {
3499            snprintf(buffer, SIZE, "    output %d:\n", i);
3500            write(fd, buffer, strlen(buffer));
3501            mOutputProfiles[i]->dump(fd);
3502        }
3503    }
3504    if (mInputProfiles.size()) {
3505        write(fd, "  - inputs:\n", sizeof("  - inputs:\n"));
3506        for (size_t i = 0; i < mInputProfiles.size(); i++) {
3507            snprintf(buffer, SIZE, "    input %d:\n", i);
3508            write(fd, buffer, strlen(buffer));
3509            mInputProfiles[i]->dump(fd);
3510        }
3511    }
3512}
3513
3514AudioPolicyManagerBase::IOProfile::IOProfile(HwModule *module)
3515    : mFlags((audio_output_flags_t)0), mModule(module)
3516{
3517}
3518
3519AudioPolicyManagerBase::IOProfile::~IOProfile()
3520{
3521}
3522
3523// checks if the IO profile is compatible with specified parameters.
3524// Sampling rate, format and channel mask must be specified in order to
3525// get a valid a match
3526bool AudioPolicyManagerBase::IOProfile::isCompatibleProfile(audio_devices_t device,
3527                                                            uint32_t samplingRate,
3528                                                            uint32_t format,
3529                                                            uint32_t channelMask,
3530                                                            audio_output_flags_t flags) const
3531{
3532    if (samplingRate == 0 || format == 0 || channelMask == 0) {
3533         return false;
3534     }
3535
3536     if ((mSupportedDevices & device) != device) {
3537         return false;
3538     }
3539     if ((mFlags & flags) != flags) {
3540         return false;
3541     }
3542     size_t i;
3543     for (i = 0; i < mSamplingRates.size(); i++)
3544     {
3545         if (mSamplingRates[i] == samplingRate) {
3546             break;
3547         }
3548     }
3549     if (i == mSamplingRates.size()) {
3550         return false;
3551     }
3552     for (i = 0; i < mFormats.size(); i++)
3553     {
3554         if (mFormats[i] == format) {
3555             break;
3556         }
3557     }
3558     if (i == mFormats.size()) {
3559         return false;
3560     }
3561     for (i = 0; i < mChannelMasks.size(); i++)
3562     {
3563         if (mChannelMasks[i] == channelMask) {
3564             break;
3565         }
3566     }
3567     if (i == mChannelMasks.size()) {
3568         return false;
3569     }
3570     return true;
3571}
3572
3573void AudioPolicyManagerBase::IOProfile::dump(int fd)
3574{
3575    const size_t SIZE = 256;
3576    char buffer[SIZE];
3577    String8 result;
3578
3579    snprintf(buffer, SIZE, "    - sampling rates: ");
3580    result.append(buffer);
3581    for (size_t i = 0; i < mSamplingRates.size(); i++) {
3582        snprintf(buffer, SIZE, "%d", mSamplingRates[i]);
3583        result.append(buffer);
3584        result.append(i == (mSamplingRates.size() - 1) ? "\n" : ", ");
3585    }
3586
3587    snprintf(buffer, SIZE, "    - channel masks: ");
3588    result.append(buffer);
3589    for (size_t i = 0; i < mChannelMasks.size(); i++) {
3590        snprintf(buffer, SIZE, "0x%04x", mChannelMasks[i]);
3591        result.append(buffer);
3592        result.append(i == (mChannelMasks.size() - 1) ? "\n" : ", ");
3593    }
3594
3595    snprintf(buffer, SIZE, "    - formats: ");
3596    result.append(buffer);
3597    for (size_t i = 0; i < mFormats.size(); i++) {
3598        snprintf(buffer, SIZE, "0x%08x", mFormats[i]);
3599        result.append(buffer);
3600        result.append(i == (mFormats.size() - 1) ? "\n" : ", ");
3601    }
3602
3603    snprintf(buffer, SIZE, "    - devices: 0x%04x\n", mSupportedDevices);
3604    result.append(buffer);
3605    snprintf(buffer, SIZE, "    - flags: 0x%04x\n", mFlags);
3606    result.append(buffer);
3607
3608    write(fd, result.string(), result.size());
3609}
3610
3611// --- audio_policy.conf file parsing
3612
3613struct StringToEnum {
3614    const char *name;
3615    uint32_t value;
3616};
3617
3618#define STRING_TO_ENUM(string) { #string, string }
3619#define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0]))
3620
3621const struct StringToEnum sDeviceNameToEnumTable[] = {
3622    STRING_TO_ENUM(AUDIO_DEVICE_OUT_EARPIECE),
3623    STRING_TO_ENUM(AUDIO_DEVICE_OUT_SPEAKER),
3624    STRING_TO_ENUM(AUDIO_DEVICE_OUT_WIRED_HEADSET),
3625    STRING_TO_ENUM(AUDIO_DEVICE_OUT_WIRED_HEADPHONE),
3626    STRING_TO_ENUM(AUDIO_DEVICE_OUT_ALL_SCO),
3627    STRING_TO_ENUM(AUDIO_DEVICE_OUT_ALL_A2DP),
3628    STRING_TO_ENUM(AUDIO_DEVICE_OUT_AUX_DIGITAL),
3629    STRING_TO_ENUM(AUDIO_DEVICE_OUT_DGTL_DOCK_HEADSET),
3630    STRING_TO_ENUM(AUDIO_DEVICE_OUT_ANLG_DOCK_HEADSET),
3631    STRING_TO_ENUM(AUDIO_DEVICE_OUT_USB_DEVICE),
3632    STRING_TO_ENUM(AUDIO_DEVICE_OUT_USB_ACCESSORY),
3633    STRING_TO_ENUM(AUDIO_DEVICE_OUT_ALL_USB),
3634    STRING_TO_ENUM(AUDIO_DEVICE_OUT_REMOTE_SUBMIX),
3635    STRING_TO_ENUM(AUDIO_DEVICE_IN_BUILTIN_MIC),
3636    STRING_TO_ENUM(AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET),
3637    STRING_TO_ENUM(AUDIO_DEVICE_IN_WIRED_HEADSET),
3638    STRING_TO_ENUM(AUDIO_DEVICE_IN_AUX_DIGITAL),
3639    STRING_TO_ENUM(AUDIO_DEVICE_IN_VOICE_CALL),
3640    STRING_TO_ENUM(AUDIO_DEVICE_IN_BACK_MIC),
3641    STRING_TO_ENUM(AUDIO_DEVICE_IN_REMOTE_SUBMIX),
3642    STRING_TO_ENUM(AUDIO_DEVICE_IN_ANLG_DOCK_HEADSET),
3643    STRING_TO_ENUM(AUDIO_DEVICE_IN_DGTL_DOCK_HEADSET),
3644    STRING_TO_ENUM(AUDIO_DEVICE_IN_USB_ACCESSORY),
3645};
3646
3647const struct StringToEnum sFlagNameToEnumTable[] = {
3648    STRING_TO_ENUM(AUDIO_OUTPUT_FLAG_DIRECT),
3649    STRING_TO_ENUM(AUDIO_OUTPUT_FLAG_PRIMARY),
3650    STRING_TO_ENUM(AUDIO_OUTPUT_FLAG_FAST),
3651    STRING_TO_ENUM(AUDIO_OUTPUT_FLAG_DEEP_BUFFER),
3652    STRING_TO_ENUM(AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD),
3653    STRING_TO_ENUM(AUDIO_OUTPUT_FLAG_NON_BLOCKING),
3654};
3655
3656const struct StringToEnum sFormatNameToEnumTable[] = {
3657    STRING_TO_ENUM(AUDIO_FORMAT_PCM_16_BIT),
3658    STRING_TO_ENUM(AUDIO_FORMAT_PCM_8_BIT),
3659    STRING_TO_ENUM(AUDIO_FORMAT_MP3),
3660    STRING_TO_ENUM(AUDIO_FORMAT_AAC),
3661    STRING_TO_ENUM(AUDIO_FORMAT_VORBIS),
3662};
3663
3664const struct StringToEnum sOutChannelsNameToEnumTable[] = {
3665    STRING_TO_ENUM(AUDIO_CHANNEL_OUT_MONO),
3666    STRING_TO_ENUM(AUDIO_CHANNEL_OUT_STEREO),
3667    STRING_TO_ENUM(AUDIO_CHANNEL_OUT_5POINT1),
3668    STRING_TO_ENUM(AUDIO_CHANNEL_OUT_7POINT1),
3669};
3670
3671const struct StringToEnum sInChannelsNameToEnumTable[] = {
3672    STRING_TO_ENUM(AUDIO_CHANNEL_IN_MONO),
3673    STRING_TO_ENUM(AUDIO_CHANNEL_IN_STEREO),
3674    STRING_TO_ENUM(AUDIO_CHANNEL_IN_FRONT_BACK),
3675};
3676
3677
3678uint32_t AudioPolicyManagerBase::stringToEnum(const struct StringToEnum *table,
3679                                              size_t size,
3680                                              const char *name)
3681{
3682    for (size_t i = 0; i < size; i++) {
3683        if (strcmp(table[i].name, name) == 0) {
3684            ALOGV("stringToEnum() found %s", table[i].name);
3685            return table[i].value;
3686        }
3687    }
3688    return 0;
3689}
3690
3691audio_output_flags_t AudioPolicyManagerBase::parseFlagNames(char *name)
3692{
3693    uint32_t flag = 0;
3694
3695    // it is OK to cast name to non const here as we are not going to use it after
3696    // strtok() modifies it
3697    char *flagName = strtok(name, "|");
3698    while (flagName != NULL) {
3699        if (strlen(flagName) != 0) {
3700            flag |= stringToEnum(sFlagNameToEnumTable,
3701                               ARRAY_SIZE(sFlagNameToEnumTable),
3702                               flagName);
3703        }
3704        flagName = strtok(NULL, "|");
3705    }
3706    //force direct flag if offload flag is set: offloading implies a direct output stream
3707    // and all common behaviors are driven by checking only the direct flag
3708    // this should normally be set appropriately in the policy configuration file
3709    if ((flag & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) != 0) {
3710        flag |= AUDIO_OUTPUT_FLAG_DIRECT;
3711    }
3712
3713    return (audio_output_flags_t)flag;
3714}
3715
3716audio_devices_t AudioPolicyManagerBase::parseDeviceNames(char *name)
3717{
3718    uint32_t device = 0;
3719
3720    char *devName = strtok(name, "|");
3721    while (devName != NULL) {
3722        if (strlen(devName) != 0) {
3723            device |= stringToEnum(sDeviceNameToEnumTable,
3724                                 ARRAY_SIZE(sDeviceNameToEnumTable),
3725                                 devName);
3726        }
3727        devName = strtok(NULL, "|");
3728    }
3729    return device;
3730}
3731
3732void AudioPolicyManagerBase::loadSamplingRates(char *name, IOProfile *profile)
3733{
3734    char *str = strtok(name, "|");
3735
3736    // by convention, "0' in the first entry in mSamplingRates indicates the supported sampling
3737    // rates should be read from the output stream after it is opened for the first time
3738    if (str != NULL && strcmp(str, DYNAMIC_VALUE_TAG) == 0) {
3739        profile->mSamplingRates.add(0);
3740        return;
3741    }
3742
3743    while (str != NULL) {
3744        uint32_t rate = atoi(str);
3745        if (rate != 0) {
3746            ALOGV("loadSamplingRates() adding rate %d", rate);
3747            profile->mSamplingRates.add(rate);
3748        }
3749        str = strtok(NULL, "|");
3750    }
3751    return;
3752}
3753
3754void AudioPolicyManagerBase::loadFormats(char *name, IOProfile *profile)
3755{
3756    char *str = strtok(name, "|");
3757
3758    // by convention, "0' in the first entry in mFormats indicates the supported formats
3759    // should be read from the output stream after it is opened for the first time
3760    if (str != NULL && strcmp(str, DYNAMIC_VALUE_TAG) == 0) {
3761        profile->mFormats.add((audio_format_t)0);
3762        return;
3763    }
3764
3765    while (str != NULL) {
3766        audio_format_t format = (audio_format_t)stringToEnum(sFormatNameToEnumTable,
3767                                                             ARRAY_SIZE(sFormatNameToEnumTable),
3768                                                             str);
3769        if (format != 0) {
3770            profile->mFormats.add(format);
3771        }
3772        str = strtok(NULL, "|");
3773    }
3774    return;
3775}
3776
3777void AudioPolicyManagerBase::loadInChannels(char *name, IOProfile *profile)
3778{
3779    const char *str = strtok(name, "|");
3780
3781    ALOGV("loadInChannels() %s", name);
3782
3783    if (str != NULL && strcmp(str, DYNAMIC_VALUE_TAG) == 0) {
3784        profile->mChannelMasks.add((audio_channel_mask_t)0);
3785        return;
3786    }
3787
3788    while (str != NULL) {
3789        audio_channel_mask_t channelMask =
3790                (audio_channel_mask_t)stringToEnum(sInChannelsNameToEnumTable,
3791                                                   ARRAY_SIZE(sInChannelsNameToEnumTable),
3792                                                   str);
3793        if (channelMask != 0) {
3794            ALOGV("loadInChannels() adding channelMask %04x", channelMask);
3795            profile->mChannelMasks.add(channelMask);
3796        }
3797        str = strtok(NULL, "|");
3798    }
3799    return;
3800}
3801
3802void AudioPolicyManagerBase::loadOutChannels(char *name, IOProfile *profile)
3803{
3804    const char *str = strtok(name, "|");
3805
3806    ALOGV("loadOutChannels() %s", name);
3807
3808    // by convention, "0' in the first entry in mChannelMasks indicates the supported channel
3809    // masks should be read from the output stream after it is opened for the first time
3810    if (str != NULL && strcmp(str, DYNAMIC_VALUE_TAG) == 0) {
3811        profile->mChannelMasks.add((audio_channel_mask_t)0);
3812        return;
3813    }
3814
3815    while (str != NULL) {
3816        audio_channel_mask_t channelMask =
3817                (audio_channel_mask_t)stringToEnum(sOutChannelsNameToEnumTable,
3818                                                   ARRAY_SIZE(sOutChannelsNameToEnumTable),
3819                                                   str);
3820        if (channelMask != 0) {
3821            profile->mChannelMasks.add(channelMask);
3822        }
3823        str = strtok(NULL, "|");
3824    }
3825    return;
3826}
3827
3828status_t AudioPolicyManagerBase::loadInput(cnode *root, HwModule *module)
3829{
3830    cnode *node = root->first_child;
3831
3832    IOProfile *profile = new IOProfile(module);
3833
3834    while (node) {
3835        if (strcmp(node->name, SAMPLING_RATES_TAG) == 0) {
3836            loadSamplingRates((char *)node->value, profile);
3837        } else if (strcmp(node->name, FORMATS_TAG) == 0) {
3838            loadFormats((char *)node->value, profile);
3839        } else if (strcmp(node->name, CHANNELS_TAG) == 0) {
3840            loadInChannels((char *)node->value, profile);
3841        } else if (strcmp(node->name, DEVICES_TAG) == 0) {
3842            profile->mSupportedDevices = parseDeviceNames((char *)node->value);
3843        }
3844        node = node->next;
3845    }
3846    ALOGW_IF(profile->mSupportedDevices == AUDIO_DEVICE_NONE,
3847            "loadInput() invalid supported devices");
3848    ALOGW_IF(profile->mChannelMasks.size() == 0,
3849            "loadInput() invalid supported channel masks");
3850    ALOGW_IF(profile->mSamplingRates.size() == 0,
3851            "loadInput() invalid supported sampling rates");
3852    ALOGW_IF(profile->mFormats.size() == 0,
3853            "loadInput() invalid supported formats");
3854    if ((profile->mSupportedDevices != AUDIO_DEVICE_NONE) &&
3855            (profile->mChannelMasks.size() != 0) &&
3856            (profile->mSamplingRates.size() != 0) &&
3857            (profile->mFormats.size() != 0)) {
3858
3859        ALOGV("loadInput() adding input mSupportedDevices %04x", profile->mSupportedDevices);
3860
3861        module->mInputProfiles.add(profile);
3862        return NO_ERROR;
3863    } else {
3864        delete profile;
3865        return BAD_VALUE;
3866    }
3867}
3868
3869status_t AudioPolicyManagerBase::loadOutput(cnode *root, HwModule *module)
3870{
3871    cnode *node = root->first_child;
3872
3873    IOProfile *profile = new IOProfile(module);
3874
3875    while (node) {
3876        if (strcmp(node->name, SAMPLING_RATES_TAG) == 0) {
3877            loadSamplingRates((char *)node->value, profile);
3878        } else if (strcmp(node->name, FORMATS_TAG) == 0) {
3879            loadFormats((char *)node->value, profile);
3880        } else if (strcmp(node->name, CHANNELS_TAG) == 0) {
3881            loadOutChannels((char *)node->value, profile);
3882        } else if (strcmp(node->name, DEVICES_TAG) == 0) {
3883            profile->mSupportedDevices = parseDeviceNames((char *)node->value);
3884        } else if (strcmp(node->name, FLAGS_TAG) == 0) {
3885            profile->mFlags = parseFlagNames((char *)node->value);
3886        }
3887        node = node->next;
3888    }
3889    ALOGW_IF(profile->mSupportedDevices == AUDIO_DEVICE_NONE,
3890            "loadOutput() invalid supported devices");
3891    ALOGW_IF(profile->mChannelMasks.size() == 0,
3892            "loadOutput() invalid supported channel masks");
3893    ALOGW_IF(profile->mSamplingRates.size() == 0,
3894            "loadOutput() invalid supported sampling rates");
3895    ALOGW_IF(profile->mFormats.size() == 0,
3896            "loadOutput() invalid supported formats");
3897    if ((profile->mSupportedDevices != AUDIO_DEVICE_NONE) &&
3898            (profile->mChannelMasks.size() != 0) &&
3899            (profile->mSamplingRates.size() != 0) &&
3900            (profile->mFormats.size() != 0)) {
3901
3902        ALOGV("loadOutput() adding output mSupportedDevices %04x, mFlags %04x",
3903              profile->mSupportedDevices, profile->mFlags);
3904
3905        module->mOutputProfiles.add(profile);
3906        return NO_ERROR;
3907    } else {
3908        delete profile;
3909        return BAD_VALUE;
3910    }
3911}
3912
3913void AudioPolicyManagerBase::loadHwModule(cnode *root)
3914{
3915    cnode *node = config_find(root, OUTPUTS_TAG);
3916    status_t status = NAME_NOT_FOUND;
3917
3918    HwModule *module = new HwModule(root->name);
3919
3920    if (node != NULL) {
3921        if (strcmp(root->name, AUDIO_HARDWARE_MODULE_ID_A2DP) == 0) {
3922            mHasA2dp = true;
3923        } else if (strcmp(root->name, AUDIO_HARDWARE_MODULE_ID_USB) == 0) {
3924            mHasUsb = true;
3925        } else if (strcmp(root->name, AUDIO_HARDWARE_MODULE_ID_REMOTE_SUBMIX) == 0) {
3926            mHasRemoteSubmix = true;
3927        }
3928
3929        node = node->first_child;
3930        while (node) {
3931            ALOGV("loadHwModule() loading output %s", node->name);
3932            status_t tmpStatus = loadOutput(node, module);
3933            if (status == NAME_NOT_FOUND || status == NO_ERROR) {
3934                status = tmpStatus;
3935            }
3936            node = node->next;
3937        }
3938    }
3939    node = config_find(root, INPUTS_TAG);
3940    if (node != NULL) {
3941        node = node->first_child;
3942        while (node) {
3943            ALOGV("loadHwModule() loading input %s", node->name);
3944            status_t tmpStatus = loadInput(node, module);
3945            if (status == NAME_NOT_FOUND || status == NO_ERROR) {
3946                status = tmpStatus;
3947            }
3948            node = node->next;
3949        }
3950    }
3951    if (status == NO_ERROR) {
3952        mHwModules.add(module);
3953    } else {
3954        delete module;
3955    }
3956}
3957
3958void AudioPolicyManagerBase::loadHwModules(cnode *root)
3959{
3960    cnode *node = config_find(root, AUDIO_HW_MODULE_TAG);
3961    if (node == NULL) {
3962        return;
3963    }
3964
3965    node = node->first_child;
3966    while (node) {
3967        ALOGV("loadHwModules() loading module %s", node->name);
3968        loadHwModule(node);
3969        node = node->next;
3970    }
3971}
3972
3973void AudioPolicyManagerBase::loadGlobalConfig(cnode *root)
3974{
3975    cnode *node = config_find(root, GLOBAL_CONFIG_TAG);
3976    if (node == NULL) {
3977        return;
3978    }
3979    node = node->first_child;
3980    while (node) {
3981        if (strcmp(ATTACHED_OUTPUT_DEVICES_TAG, node->name) == 0) {
3982            mAttachedOutputDevices = parseDeviceNames((char *)node->value);
3983            ALOGW_IF(mAttachedOutputDevices == AUDIO_DEVICE_NONE,
3984                    "loadGlobalConfig() no attached output devices");
3985            ALOGV("loadGlobalConfig() mAttachedOutputDevices %04x", mAttachedOutputDevices);
3986        } else if (strcmp(DEFAULT_OUTPUT_DEVICE_TAG, node->name) == 0) {
3987            mDefaultOutputDevice = (audio_devices_t)stringToEnum(sDeviceNameToEnumTable,
3988                                              ARRAY_SIZE(sDeviceNameToEnumTable),
3989                                              (char *)node->value);
3990            ALOGW_IF(mDefaultOutputDevice == AUDIO_DEVICE_NONE,
3991                    "loadGlobalConfig() default device not specified");
3992            ALOGV("loadGlobalConfig() mDefaultOutputDevice %04x", mDefaultOutputDevice);
3993        } else if (strcmp(ATTACHED_INPUT_DEVICES_TAG, node->name) == 0) {
3994            mAvailableInputDevices = parseDeviceNames((char *)node->value) & ~AUDIO_DEVICE_BIT_IN;
3995            ALOGV("loadGlobalConfig() mAvailableInputDevices %04x", mAvailableInputDevices);
3996        }
3997        node = node->next;
3998    }
3999}
4000
4001status_t AudioPolicyManagerBase::loadAudioPolicyConfig(const char *path)
4002{
4003    cnode *root;
4004    char *data;
4005
4006    data = (char *)load_file(path, NULL);
4007    if (data == NULL) {
4008        return -ENODEV;
4009    }
4010    root = config_node("", "");
4011    config_load(root, data);
4012
4013    loadGlobalConfig(root);
4014    loadHwModules(root);
4015
4016    config_free(root);
4017    free(root);
4018    free(data);
4019
4020    ALOGI("loadAudioPolicyConfig() loaded %s\n", path);
4021
4022    return NO_ERROR;
4023}
4024
4025void AudioPolicyManagerBase::defaultAudioPolicyConfig(void)
4026{
4027    HwModule *module;
4028    IOProfile *profile;
4029
4030    mDefaultOutputDevice = AUDIO_DEVICE_OUT_SPEAKER;
4031    mAttachedOutputDevices = AUDIO_DEVICE_OUT_SPEAKER;
4032    mAvailableInputDevices = AUDIO_DEVICE_IN_BUILTIN_MIC & ~AUDIO_DEVICE_BIT_IN;
4033
4034    module = new HwModule("primary");
4035
4036    profile = new IOProfile(module);
4037    profile->mSamplingRates.add(44100);
4038    profile->mFormats.add(AUDIO_FORMAT_PCM_16_BIT);
4039    profile->mChannelMasks.add(AUDIO_CHANNEL_OUT_STEREO);
4040    profile->mSupportedDevices = AUDIO_DEVICE_OUT_SPEAKER;
4041    profile->mFlags = AUDIO_OUTPUT_FLAG_PRIMARY;
4042    module->mOutputProfiles.add(profile);
4043
4044    profile = new IOProfile(module);
4045    profile->mSamplingRates.add(8000);
4046    profile->mFormats.add(AUDIO_FORMAT_PCM_16_BIT);
4047    profile->mChannelMasks.add(AUDIO_CHANNEL_IN_MONO);
4048    profile->mSupportedDevices = AUDIO_DEVICE_IN_BUILTIN_MIC;
4049    module->mInputProfiles.add(profile);
4050
4051    mHwModules.add(module);
4052}
4053
4054}; // namespace android
4055