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#include <utils/Log.h>
28#include <hardware_legacy/AudioPolicyManagerBase.h>
29#include <hardware/audio_effect.h>
30#include <hardware/audio.h>
31#include <math.h>
32#include <hardware_legacy/audio_policy_conf.h>
33
34namespace android_audio_legacy {
35
36// ----------------------------------------------------------------------------
37// AudioPolicyInterface implementation
38// ----------------------------------------------------------------------------
39
40
41status_t AudioPolicyManagerBase::setDeviceConnectionState(AudioSystem::audio_devices device,
42                                                  AudioSystem::device_connection_state state,
43                                                  const char *device_address)
44{
45    SortedVector <audio_io_handle_t> outputs;
46
47    ALOGV("setDeviceConnectionState() device: %x, state %d, address %s", device, state, device_address);
48
49    // connect/disconnect only 1 device at a time
50    if (AudioSystem::popCount(device) != 1) return BAD_VALUE;
51
52    if (strlen(device_address) >= MAX_DEVICE_ADDRESS_LEN) {
53        ALOGE("setDeviceConnectionState() invalid address: %s", device_address);
54        return BAD_VALUE;
55    }
56
57    // handle output devices
58    if (AudioSystem::isOutputDevice(device)) {
59
60        if (!mHasA2dp && AudioSystem::isA2dpDevice(device)) {
61            ALOGE("setDeviceConnectionState() invalid device: %x", device);
62            return BAD_VALUE;
63        }
64        if (!mHasUsb && audio_is_usb_device((audio_devices_t)device)) {
65            ALOGE("setDeviceConnectionState() invalid device: %x", device);
66            return BAD_VALUE;
67        }
68
69        switch (state)
70        {
71        // handle output device connection
72        case AudioSystem::DEVICE_STATE_AVAILABLE:
73            if (mAvailableOutputDevices & device) {
74                ALOGW("setDeviceConnectionState() device already connected: %x", device);
75                return INVALID_OPERATION;
76            }
77            ALOGV("setDeviceConnectionState() connecting device %x", device);
78
79            if (checkOutputsForDevice((audio_devices_t)device, state, outputs) != NO_ERROR) {
80                return INVALID_OPERATION;
81            }
82            ALOGV("setDeviceConnectionState() checkOutputsForDevice() returned %d outputs",
83                  outputs.size());
84            // register new device as available
85            mAvailableOutputDevices = (audio_devices_t)(mAvailableOutputDevices | device);
86
87            if (!outputs.isEmpty()) {
88                String8 paramStr;
89                if (mHasA2dp && AudioSystem::isA2dpDevice(device)) {
90                    // handle A2DP device connection
91                    AudioParameter param;
92                    param.add(String8(AUDIO_PARAMETER_A2DP_SINK_ADDRESS), String8(device_address));
93                    paramStr = param.toString();
94                    mA2dpDeviceAddress = String8(device_address, MAX_DEVICE_ADDRESS_LEN);
95                    mA2dpSuspended = false;
96                } else if (AudioSystem::isBluetoothScoDevice(device)) {
97                    // handle SCO device connection
98                    mScoDeviceAddress = String8(device_address, MAX_DEVICE_ADDRESS_LEN);
99                } else if (mHasUsb && audio_is_usb_device((audio_devices_t)device)) {
100                    // handle USB device connection
101                    mUsbCardAndDevice = String8(device_address, MAX_DEVICE_ADDRESS_LEN);
102                    paramStr = mUsbCardAndDevice;
103                }
104                if (!paramStr.isEmpty()) {
105                    for (size_t i = 0; i < outputs.size(); i++) {
106                        mpClientInterface->setParameters(outputs[i], paramStr);
107                    }
108                }
109            }
110            break;
111        // handle output device disconnection
112        case AudioSystem::DEVICE_STATE_UNAVAILABLE: {
113            if (!(mAvailableOutputDevices & device)) {
114                ALOGW("setDeviceConnectionState() device not connected: %x", device);
115                return INVALID_OPERATION;
116            }
117
118            ALOGV("setDeviceConnectionState() disconnecting device %x", device);
119            // remove device from available output devices
120            mAvailableOutputDevices = (audio_devices_t)(mAvailableOutputDevices & ~device);
121
122            checkOutputsForDevice((audio_devices_t)device, state, outputs);
123            if (mHasA2dp && AudioSystem::isA2dpDevice(device)) {
124                // handle A2DP device disconnection
125                mA2dpDeviceAddress = "";
126                mA2dpSuspended = false;
127            } else if (AudioSystem::isBluetoothScoDevice(device)) {
128                // handle SCO device disconnection
129                mScoDeviceAddress = "";
130            } else if (mHasUsb && audio_is_usb_device((audio_devices_t)device)) {
131                // handle USB device disconnection
132                mUsbCardAndDevice = "";
133            }
134            } break;
135
136        default:
137            ALOGE("setDeviceConnectionState() invalid state: %x", state);
138            return BAD_VALUE;
139        }
140
141        checkA2dpSuspend();
142        checkOutputForAllStrategies();
143        // outputs must be closed after checkOutputForAllStrategies() is executed
144        if (!outputs.isEmpty()) {
145            for (size_t i = 0; i < outputs.size(); i++) {
146                // close unused outputs after device disconnection or direct outputs that have been
147                // opened by checkOutputsForDevice() to query dynamic parameters
148                if ((state == AudioSystem::DEVICE_STATE_UNAVAILABLE) ||
149                        (mOutputs.valueFor(outputs[i])->mFlags & AUDIO_OUTPUT_FLAG_DIRECT)) {
150                    closeOutput(outputs[i]);
151                }
152            }
153        }
154
155        updateDeviceForStrategy();
156        for (size_t i = 0; i < mOutputs.size(); i++) {
157            setOutputDevice(mOutputs.keyAt(i), getNewDevice(mOutputs.keyAt(i), true /*fromCache*/));
158        }
159
160        if (device == AudioSystem::DEVICE_OUT_WIRED_HEADSET) {
161            device = AudioSystem::DEVICE_IN_WIRED_HEADSET;
162        } else if (device == AudioSystem::DEVICE_OUT_BLUETOOTH_SCO ||
163                   device == AudioSystem::DEVICE_OUT_BLUETOOTH_SCO_HEADSET ||
164                   device == AudioSystem::DEVICE_OUT_BLUETOOTH_SCO_CARKIT) {
165            device = AudioSystem::DEVICE_IN_BLUETOOTH_SCO_HEADSET;
166        } else {
167            return NO_ERROR;
168        }
169    }
170    // handle input devices
171    if (AudioSystem::isInputDevice(device)) {
172
173        switch (state)
174        {
175        // handle input device connection
176        case AudioSystem::DEVICE_STATE_AVAILABLE: {
177            if (mAvailableInputDevices & device) {
178                ALOGW("setDeviceConnectionState() device already connected: %d", device);
179                return INVALID_OPERATION;
180            }
181            mAvailableInputDevices = (audio_devices_t)(mAvailableInputDevices | device);
182            }
183            break;
184
185        // handle input device disconnection
186        case AudioSystem::DEVICE_STATE_UNAVAILABLE: {
187            if (!(mAvailableInputDevices & device)) {
188                ALOGW("setDeviceConnectionState() device not connected: %d", device);
189                return INVALID_OPERATION;
190            }
191            mAvailableInputDevices = (audio_devices_t) (mAvailableInputDevices & ~device);
192            } break;
193
194        default:
195            ALOGE("setDeviceConnectionState() invalid state: %x", state);
196            return BAD_VALUE;
197        }
198
199        audio_io_handle_t activeInput = getActiveInput();
200        if (activeInput != 0) {
201            AudioInputDescriptor *inputDesc = mInputs.valueFor(activeInput);
202            audio_devices_t newDevice = getDeviceForInputSource(inputDesc->mInputSource);
203            if ((newDevice != 0) && (newDevice != inputDesc->mDevice)) {
204                ALOGV("setDeviceConnectionState() changing device from %x to %x for input %d",
205                        inputDesc->mDevice, newDevice, activeInput);
206                inputDesc->mDevice = newDevice;
207                AudioParameter param = AudioParameter();
208                param.addInt(String8(AudioParameter::keyRouting), (int)newDevice);
209                mpClientInterface->setParameters(activeInput, param.toString());
210            }
211        }
212
213        return NO_ERROR;
214    }
215
216    ALOGW("setDeviceConnectionState() invalid device: %x", device);
217    return BAD_VALUE;
218}
219
220AudioSystem::device_connection_state AudioPolicyManagerBase::getDeviceConnectionState(AudioSystem::audio_devices device,
221                                                  const char *device_address)
222{
223    AudioSystem::device_connection_state state = AudioSystem::DEVICE_STATE_UNAVAILABLE;
224    String8 address = String8(device_address);
225    if (AudioSystem::isOutputDevice(device)) {
226        if (device & mAvailableOutputDevices) {
227            if (AudioSystem::isA2dpDevice(device) &&
228                (!mHasA2dp || (address != "" && mA2dpDeviceAddress != address))) {
229                return state;
230            }
231            if (AudioSystem::isBluetoothScoDevice(device) &&
232                address != "" && mScoDeviceAddress != address) {
233                return state;
234            }
235            if (audio_is_usb_device((audio_devices_t)device) &&
236                (!mHasUsb || (address != "" && mUsbCardAndDevice != address))) {
237                ALOGE("setDeviceConnectionState() invalid device: %x", device);
238                return state;
239            }
240            state = AudioSystem::DEVICE_STATE_AVAILABLE;
241        }
242    } else if (AudioSystem::isInputDevice(device)) {
243        if (device & mAvailableInputDevices) {
244            state = AudioSystem::DEVICE_STATE_AVAILABLE;
245        }
246    }
247
248    return state;
249}
250
251void AudioPolicyManagerBase::setPhoneState(int state)
252{
253    ALOGV("setPhoneState() state %d", state);
254    audio_devices_t newDevice = (audio_devices_t)0;
255    if (state < 0 || state >= AudioSystem::NUM_MODES) {
256        ALOGW("setPhoneState() invalid state %d", state);
257        return;
258    }
259
260    if (state == mPhoneState ) {
261        ALOGW("setPhoneState() setting same state %d", state);
262        return;
263    }
264
265    // if leaving call state, handle special case of active streams
266    // pertaining to sonification strategy see handleIncallSonification()
267    if (isInCall()) {
268        ALOGV("setPhoneState() in call state management: new state is %d", state);
269        for (int stream = 0; stream < AudioSystem::NUM_STREAM_TYPES; stream++) {
270            handleIncallSonification(stream, false, true);
271        }
272    }
273
274    // store previous phone state for management of sonification strategy below
275    int oldState = mPhoneState;
276    mPhoneState = state;
277    bool force = false;
278
279    // are we entering or starting a call
280    if (!isStateInCall(oldState) && isStateInCall(state)) {
281        ALOGV("  Entering call in setPhoneState()");
282        // force routing command to audio hardware when starting a call
283        // even if no device change is needed
284        force = true;
285    } else if (isStateInCall(oldState) && !isStateInCall(state)) {
286        ALOGV("  Exiting call in setPhoneState()");
287        // force routing command to audio hardware when exiting a call
288        // even if no device change is needed
289        force = true;
290    } else if (isStateInCall(state) && (state != oldState)) {
291        ALOGV("  Switching between telephony and VoIP in setPhoneState()");
292        // force routing command to audio hardware when switching between telephony and VoIP
293        // even if no device change is needed
294        force = true;
295    }
296
297    // check for device and output changes triggered by new phone state
298    newDevice = getNewDevice(mPrimaryOutput, false /*fromCache*/);
299    checkA2dpSuspend();
300    checkOutputForAllStrategies();
301    updateDeviceForStrategy();
302
303    AudioOutputDescriptor *hwOutputDesc = mOutputs.valueFor(mPrimaryOutput);
304
305    // force routing command to audio hardware when ending call
306    // even if no device change is needed
307    if (isStateInCall(oldState) && newDevice == 0) {
308        newDevice = hwOutputDesc->device();
309    }
310
311    // when changing from ring tone to in call mode, mute the ringing tone
312    // immediately and delay the route change to avoid sending the ring tone
313    // tail into the earpiece or headset.
314    int delayMs = 0;
315    if (isStateInCall(state) && oldState == AudioSystem::MODE_RINGTONE) {
316        // delay the device change command by twice the output latency to have some margin
317        // and be sure that audio buffers not yet affected by the mute are out when
318        // we actually apply the route change
319        delayMs = hwOutputDesc->mLatency*2;
320        setStreamMute(AudioSystem::RING, true, mPrimaryOutput);
321    }
322
323    // change routing is necessary
324    setOutputDevice(mPrimaryOutput, newDevice, force, delayMs);
325
326    // if entering in call state, handle special case of active streams
327    // pertaining to sonification strategy see handleIncallSonification()
328    if (isStateInCall(state)) {
329        ALOGV("setPhoneState() in call state management: new state is %d", state);
330        // unmute the ringing tone after a sufficient delay if it was muted before
331        // setting output device above
332        if (oldState == AudioSystem::MODE_RINGTONE) {
333            setStreamMute(AudioSystem::RING, false, mPrimaryOutput, MUTE_TIME_MS);
334        }
335        for (int stream = 0; stream < AudioSystem::NUM_STREAM_TYPES; stream++) {
336            handleIncallSonification(stream, true, true);
337        }
338    }
339
340    // Flag that ringtone volume must be limited to music volume until we exit MODE_RINGTONE
341    if (state == AudioSystem::MODE_RINGTONE &&
342        isStreamActive(AudioSystem::MUSIC, SONIFICATION_HEADSET_MUSIC_DELAY)) {
343        mLimitRingtoneVolume = true;
344    } else {
345        mLimitRingtoneVolume = false;
346    }
347}
348
349void AudioPolicyManagerBase::setForceUse(AudioSystem::force_use usage, AudioSystem::forced_config config)
350{
351    ALOGV("setForceUse() usage %d, config %d, mPhoneState %d", usage, config, mPhoneState);
352
353    bool forceVolumeReeval = false;
354    switch(usage) {
355    case AudioSystem::FOR_COMMUNICATION:
356        if (config != AudioSystem::FORCE_SPEAKER && config != AudioSystem::FORCE_BT_SCO &&
357            config != AudioSystem::FORCE_NONE) {
358            ALOGW("setForceUse() invalid config %d for FOR_COMMUNICATION", config);
359            return;
360        }
361        forceVolumeReeval = true;
362        mForceUse[usage] = config;
363        break;
364    case AudioSystem::FOR_MEDIA:
365        if (config != AudioSystem::FORCE_HEADPHONES && config != AudioSystem::FORCE_BT_A2DP &&
366            config != AudioSystem::FORCE_WIRED_ACCESSORY &&
367            config != AudioSystem::FORCE_ANALOG_DOCK &&
368            config != AudioSystem::FORCE_DIGITAL_DOCK && config != AudioSystem::FORCE_NONE &&
369            config != AudioSystem::FORCE_NO_BT_A2DP) {
370            ALOGW("setForceUse() invalid config %d for FOR_MEDIA", config);
371            return;
372        }
373        mForceUse[usage] = config;
374        break;
375    case AudioSystem::FOR_RECORD:
376        if (config != AudioSystem::FORCE_BT_SCO && config != AudioSystem::FORCE_WIRED_ACCESSORY &&
377            config != AudioSystem::FORCE_NONE) {
378            ALOGW("setForceUse() invalid config %d for FOR_RECORD", config);
379            return;
380        }
381        mForceUse[usage] = config;
382        break;
383    case AudioSystem::FOR_DOCK:
384        if (config != AudioSystem::FORCE_NONE && config != AudioSystem::FORCE_BT_CAR_DOCK &&
385            config != AudioSystem::FORCE_BT_DESK_DOCK &&
386            config != AudioSystem::FORCE_WIRED_ACCESSORY &&
387            config != AudioSystem::FORCE_ANALOG_DOCK &&
388            config != AudioSystem::FORCE_DIGITAL_DOCK) {
389            ALOGW("setForceUse() invalid config %d for FOR_DOCK", config);
390        }
391        forceVolumeReeval = true;
392        mForceUse[usage] = config;
393        break;
394    default:
395        ALOGW("setForceUse() invalid usage %d", usage);
396        break;
397    }
398
399    // check for device and output changes triggered by new force usage
400    checkA2dpSuspend();
401    checkOutputForAllStrategies();
402    updateDeviceForStrategy();
403    for (size_t i = 0; i < mOutputs.size(); i++) {
404        audio_io_handle_t output = mOutputs.keyAt(i);
405        audio_devices_t newDevice = getNewDevice(output, true /*fromCache*/);
406        setOutputDevice(output, newDevice, (newDevice != 0));
407        if (forceVolumeReeval && (newDevice != 0)) {
408            applyStreamVolumes(output, newDevice, 0, true);
409        }
410    }
411
412    audio_io_handle_t activeInput = getActiveInput();
413    if (activeInput != 0) {
414        AudioInputDescriptor *inputDesc = mInputs.valueFor(activeInput);
415        audio_devices_t newDevice = getDeviceForInputSource(inputDesc->mInputSource);
416        if ((newDevice != 0) && (newDevice != inputDesc->mDevice)) {
417            ALOGV("setForceUse() changing device from %x to %x for input %d",
418                    inputDesc->mDevice, newDevice, activeInput);
419            inputDesc->mDevice = newDevice;
420            AudioParameter param = AudioParameter();
421            param.addInt(String8(AudioParameter::keyRouting), (int)newDevice);
422            mpClientInterface->setParameters(activeInput, param.toString());
423        }
424    }
425
426}
427
428AudioSystem::forced_config AudioPolicyManagerBase::getForceUse(AudioSystem::force_use usage)
429{
430    return mForceUse[usage];
431}
432
433void AudioPolicyManagerBase::setSystemProperty(const char* property, const char* value)
434{
435    ALOGV("setSystemProperty() property %s, value %s", property, value);
436    if (strcmp(property, "ro.camera.sound.forced") == 0) {
437        if (atoi(value)) {
438            ALOGV("ENFORCED_AUDIBLE cannot be muted");
439            mStreams[AudioSystem::ENFORCED_AUDIBLE].mCanBeMuted = false;
440        } else {
441            ALOGV("ENFORCED_AUDIBLE can be muted");
442            mStreams[AudioSystem::ENFORCED_AUDIBLE].mCanBeMuted = true;
443        }
444    }
445}
446
447AudioPolicyManagerBase::IOProfile *AudioPolicyManagerBase::getProfileForDirectOutput(
448                                                               audio_devices_t device,
449                                                               uint32_t samplingRate,
450                                                               uint32_t format,
451                                                               uint32_t channelMask,
452                                                               audio_output_flags_t flags)
453{
454    for (size_t i = 0; i < mHwModules.size(); i++) {
455        if (mHwModules[i]->mHandle == 0) {
456            continue;
457        }
458        for (size_t j = 0; j < mHwModules[i]->mOutputProfiles.size(); j++) {
459           IOProfile *profile = mHwModules[i]->mOutputProfiles[j];
460           if (profile->isCompatibleProfile(device, samplingRate, format,
461                                           channelMask,
462                                           AUDIO_OUTPUT_FLAG_DIRECT)) {
463               if (mAvailableOutputDevices & profile->mSupportedDevices) {
464                   return mHwModules[i]->mOutputProfiles[j];
465               }
466           }
467        }
468    }
469    return 0;
470}
471
472audio_io_handle_t AudioPolicyManagerBase::getOutput(AudioSystem::stream_type stream,
473                                    uint32_t samplingRate,
474                                    uint32_t format,
475                                    uint32_t channelMask,
476                                    AudioSystem::output_flags flags)
477{
478    audio_io_handle_t output = 0;
479    uint32_t latency = 0;
480    routing_strategy strategy = getStrategy((AudioSystem::stream_type)stream);
481    audio_devices_t device = getDeviceForStrategy(strategy, false /*fromCache*/);
482    ALOGV("getOutput() stream %d, samplingRate %d, format %d, channelMask %x, flags %x",
483          stream, samplingRate, format, channelMask, flags);
484
485#ifdef AUDIO_POLICY_TEST
486    if (mCurOutput != 0) {
487        ALOGV("getOutput() test output mCurOutput %d, samplingRate %d, format %d, channelMask %x, mDirectOutput %d",
488                mCurOutput, mTestSamplingRate, mTestFormat, mTestChannels, mDirectOutput);
489
490        if (mTestOutputs[mCurOutput] == 0) {
491            ALOGV("getOutput() opening test output");
492            AudioOutputDescriptor *outputDesc = new AudioOutputDescriptor(NULL);
493            outputDesc->mDevice = mTestDevice;
494            outputDesc->mSamplingRate = mTestSamplingRate;
495            outputDesc->mFormat = mTestFormat;
496            outputDesc->mChannelMask = mTestChannels;
497            outputDesc->mLatency = mTestLatencyMs;
498            outputDesc->mFlags = (audio_output_flags_t)(mDirectOutput ? AudioSystem::OUTPUT_FLAG_DIRECT : 0);
499            outputDesc->mRefCount[stream] = 0;
500            mTestOutputs[mCurOutput] = mpClientInterface->openOutput(0, &outputDesc->mDevice,
501                                            &outputDesc->mSamplingRate,
502                                            &outputDesc->mFormat,
503                                            &outputDesc->mChannelMask,
504                                            &outputDesc->mLatency,
505                                            outputDesc->mFlags);
506            if (mTestOutputs[mCurOutput]) {
507                AudioParameter outputCmd = AudioParameter();
508                outputCmd.addInt(String8("set_id"),mCurOutput);
509                mpClientInterface->setParameters(mTestOutputs[mCurOutput],outputCmd.toString());
510                addOutput(mTestOutputs[mCurOutput], outputDesc);
511            }
512        }
513        return mTestOutputs[mCurOutput];
514    }
515#endif //AUDIO_POLICY_TEST
516
517    // open a direct output if required by specified parameters
518    IOProfile *profile = getProfileForDirectOutput(device,
519                                                   samplingRate,
520                                                   format,
521                                                   channelMask,
522                                                   (audio_output_flags_t)flags);
523    if (profile != NULL) {
524
525        ALOGV("getOutput() opening direct output device %x", device);
526
527        AudioOutputDescriptor *outputDesc = new AudioOutputDescriptor(profile);
528        outputDesc->mDevice = device;
529        outputDesc->mSamplingRate = samplingRate;
530        outputDesc->mFormat = (audio_format_t)format;
531        outputDesc->mChannelMask = (audio_channel_mask_t)channelMask;
532        outputDesc->mLatency = 0;
533        outputDesc->mFlags = (audio_output_flags_t)(flags | AUDIO_OUTPUT_FLAG_DIRECT);;
534        outputDesc->mRefCount[stream] = 0;
535        outputDesc->mStopTime[stream] = 0;
536        output = mpClientInterface->openOutput(profile->mModule->mHandle,
537                                        &outputDesc->mDevice,
538                                        &outputDesc->mSamplingRate,
539                                        &outputDesc->mFormat,
540                                        &outputDesc->mChannelMask,
541                                        &outputDesc->mLatency,
542                                        outputDesc->mFlags);
543
544        // only accept an output with the requested parameters
545        if (output == 0 ||
546            (samplingRate != 0 && samplingRate != outputDesc->mSamplingRate) ||
547            (format != 0 && format != outputDesc->mFormat) ||
548            (channelMask != 0 && channelMask != outputDesc->mChannelMask)) {
549            ALOGV("getOutput() failed opening direct output: output %d samplingRate %d %d,"
550                    "format %d %d, channelMask %04x %04x", output, samplingRate,
551                    outputDesc->mSamplingRate, format, outputDesc->mFormat, channelMask,
552                    outputDesc->mChannelMask);
553            if (output != 0) {
554                mpClientInterface->closeOutput(output);
555            }
556            delete outputDesc;
557            return 0;
558        }
559        addOutput(output, outputDesc);
560        ALOGV("getOutput() returns direct output %d", output);
561        return output;
562    }
563
564    // ignoring channel mask due to downmix capability in mixer
565
566    // open a non direct output
567
568    // get which output is suitable for the specified stream. The actual routing change will happen
569    // when startOutput() will be called
570    SortedVector<audio_io_handle_t> outputs = getOutputsForDevice(device);
571
572    output = selectOutput(outputs, flags);
573
574    ALOGW_IF((output ==0), "getOutput() could not find output for stream %d, samplingRate %d,"
575            "format %d, channels %x, flags %x", stream, samplingRate, format, channelMask, flags);
576
577    ALOGV("getOutput() returns output %d", output);
578
579    return output;
580}
581
582audio_io_handle_t AudioPolicyManagerBase::selectOutput(const SortedVector<audio_io_handle_t>& outputs,
583                                                       AudioSystem::output_flags flags)
584{
585    // select one output among several that provide a path to a particular device or set of
586    // devices (the list was previously build by getOutputsForDevice()).
587    // The priority is as follows:
588    // 1: the output with the highest number of requested policy flags
589    // 2: the primary output
590    // 3: the first output in the list
591
592    if (outputs.size() == 0) {
593        return 0;
594    }
595    if (outputs.size() == 1) {
596        return outputs[0];
597    }
598
599    int maxCommonFlags = 0;
600    audio_io_handle_t outputFlags = 0;
601    audio_io_handle_t outputPrimary = 0;
602
603    for (size_t i = 0; i < outputs.size(); i++) {
604        AudioOutputDescriptor *outputDesc = mOutputs.valueFor(outputs[i]);
605        if (!outputDesc->isDuplicated()) {
606            int commonFlags = (int)AudioSystem::popCount(outputDesc->mProfile->mFlags & flags);
607            if (commonFlags > maxCommonFlags) {
608                outputFlags = outputs[i];
609                maxCommonFlags = commonFlags;
610                ALOGV("selectOutput() commonFlags for output %d, %04x", outputs[i], commonFlags);
611            }
612            if (outputDesc->mProfile->mFlags & AUDIO_OUTPUT_FLAG_PRIMARY) {
613                outputPrimary = outputs[i];
614            }
615        }
616    }
617
618    if (outputFlags != 0) {
619        return outputFlags;
620    }
621    if (outputPrimary != 0) {
622        return outputPrimary;
623    }
624
625    return outputs[0];
626}
627
628status_t AudioPolicyManagerBase::startOutput(audio_io_handle_t output,
629                                             AudioSystem::stream_type stream,
630                                             int session)
631{
632    ALOGV("startOutput() output %d, stream %d, session %d", output, stream, session);
633    ssize_t index = mOutputs.indexOfKey(output);
634    if (index < 0) {
635        ALOGW("startOutput() unknow output %d", output);
636        return BAD_VALUE;
637    }
638
639    AudioOutputDescriptor *outputDesc = mOutputs.valueAt(index);
640
641    // increment usage count for this stream on the requested output:
642    // NOTE that the usage count is the same for duplicated output and hardware output which is
643    // necessary for a correct control of hardware output routing by startOutput() and stopOutput()
644    outputDesc->changeRefCount(stream, 1);
645
646    if (outputDesc->mRefCount[stream] == 1) {
647        audio_devices_t prevDevice = outputDesc->device();
648        audio_devices_t newDevice = getNewDevice(output, false /*fromCache*/);
649        routing_strategy strategy = getStrategy(stream);
650        bool shouldWait = (strategy == STRATEGY_SONIFICATION) ||
651                            (strategy == STRATEGY_SONIFICATION_RESPECTFUL);
652        uint32_t waitMs = 0;
653        bool force = false;
654        for (size_t i = 0; i < mOutputs.size(); i++) {
655            AudioOutputDescriptor *desc = mOutputs.valueAt(i);
656            if (desc != outputDesc) {
657                // force a device change if any other output is managed by the same hw
658                // module and has a current device selection that differs from selected device.
659                // In this case, the audio HAL must receive the new device selection so that it can
660                // change the device currently selected by the other active output.
661                if (outputDesc->sharesHwModuleWith(desc) &&
662                    desc->device() != newDevice) {
663                    force = true;
664                }
665                // wait for audio on other active outputs to be presented when starting
666                // a notification so that audio focus effect can propagate.
667                if (shouldWait && (desc->refCount() != 0) && (waitMs < desc->latency())) {
668                    waitMs = desc->latency();
669                }
670            }
671        }
672        uint32_t muteWaitMs = setOutputDevice(output, newDevice, force);
673
674        // handle special case for sonification while in call
675        if (isInCall()) {
676            handleIncallSonification(stream, true, false);
677        }
678
679        // apply volume rules for current stream and device if necessary
680        checkAndSetVolume(stream,
681                          mStreams[stream].getVolumeIndex((audio_devices_t)newDevice),
682                          output,
683                          newDevice);
684
685        // update the outputs if starting an output with a stream that can affect notification
686        // routing
687        handleNotificationRoutingForStream(stream);
688        if (waitMs > muteWaitMs) {
689            usleep((waitMs - muteWaitMs) * 2 * 1000);
690        }
691    }
692    return NO_ERROR;
693}
694
695
696status_t AudioPolicyManagerBase::stopOutput(audio_io_handle_t output,
697                                            AudioSystem::stream_type stream,
698                                            int session)
699{
700    ALOGV("stopOutput() output %d, stream %d, session %d", output, stream, session);
701    ssize_t index = mOutputs.indexOfKey(output);
702    if (index < 0) {
703        ALOGW("stopOutput() unknow output %d", output);
704        return BAD_VALUE;
705    }
706
707    AudioOutputDescriptor *outputDesc = mOutputs.valueAt(index);
708
709    // handle special case for sonification while in call
710    if (isInCall()) {
711        handleIncallSonification(stream, false, false);
712    }
713
714    if (outputDesc->mRefCount[stream] > 0) {
715        // decrement usage count of this stream on the output
716        outputDesc->changeRefCount(stream, -1);
717        // store time at which the stream was stopped - see isStreamActive()
718        if (outputDesc->mRefCount[stream] == 0) {
719            outputDesc->mStopTime[stream] = systemTime();
720            audio_devices_t newDevice = getNewDevice(output, false /*fromCache*/);
721            // delay the device switch by twice the latency because stopOutput() is executed when
722            // the track stop() command is received and at that time the audio track buffer can
723            // still contain data that needs to be drained. The latency only covers the audio HAL
724            // and kernel buffers. Also the latency does not always include additional delay in the
725            // audio path (audio DSP, CODEC ...)
726            setOutputDevice(output, newDevice, false, outputDesc->mLatency*2);
727
728            // force restoring the device selection on other active outputs if it differs from the
729            // one being selected for this output
730            for (size_t i = 0; i < mOutputs.size(); i++) {
731                audio_io_handle_t curOutput = mOutputs.keyAt(i);
732                AudioOutputDescriptor *desc = mOutputs.valueAt(i);
733                if (curOutput != output &&
734                        desc->refCount() != 0 &&
735                        outputDesc->sharesHwModuleWith(desc) &&
736                        newDevice != desc->device()) {
737                    setOutputDevice(curOutput,
738                                    getNewDevice(curOutput, false /*fromCache*/),
739                                    true,
740                                    outputDesc->mLatency*2);
741                }
742            }
743            // update the outputs if stopping one with a stream that can affect notification routing
744            handleNotificationRoutingForStream(stream);
745        }
746        return NO_ERROR;
747    } else {
748        ALOGW("stopOutput() refcount is already 0 for output %d", output);
749        return INVALID_OPERATION;
750    }
751}
752
753void AudioPolicyManagerBase::releaseOutput(audio_io_handle_t output)
754{
755    ALOGV("releaseOutput() %d", output);
756    ssize_t index = mOutputs.indexOfKey(output);
757    if (index < 0) {
758        ALOGW("releaseOutput() releasing unknown output %d", output);
759        return;
760    }
761
762#ifdef AUDIO_POLICY_TEST
763    int testIndex = testOutputIndex(output);
764    if (testIndex != 0) {
765        AudioOutputDescriptor *outputDesc = mOutputs.valueAt(index);
766        if (outputDesc->refCount() == 0) {
767            mpClientInterface->closeOutput(output);
768            delete mOutputs.valueAt(index);
769            mOutputs.removeItem(output);
770            mTestOutputs[testIndex] = 0;
771        }
772        return;
773    }
774#endif //AUDIO_POLICY_TEST
775
776    if (mOutputs.valueAt(index)->mFlags & AudioSystem::OUTPUT_FLAG_DIRECT) {
777        mpClientInterface->closeOutput(output);
778        delete mOutputs.valueAt(index);
779        mOutputs.removeItem(output);
780    }
781
782}
783
784audio_io_handle_t AudioPolicyManagerBase::getInput(int inputSource,
785                                    uint32_t samplingRate,
786                                    uint32_t format,
787                                    uint32_t channelMask,
788                                    AudioSystem::audio_in_acoustics acoustics)
789{
790    audio_io_handle_t input = 0;
791    audio_devices_t device = getDeviceForInputSource(inputSource);
792
793    ALOGV("getInput() inputSource %d, samplingRate %d, format %d, channelMask %x, acoustics %x",
794          inputSource, samplingRate, format, channelMask, acoustics);
795
796    if (device == 0) {
797        ALOGW("getInput() could not find device for inputSource %d", inputSource);
798        return 0;
799    }
800
801    // adapt channel selection to input source
802    switch(inputSource) {
803    case AUDIO_SOURCE_VOICE_UPLINK:
804        channelMask = AudioSystem::CHANNEL_IN_VOICE_UPLINK;
805        break;
806    case AUDIO_SOURCE_VOICE_DOWNLINK:
807        channelMask = AudioSystem::CHANNEL_IN_VOICE_DNLINK;
808        break;
809    case AUDIO_SOURCE_VOICE_CALL:
810        channelMask = (AudioSystem::CHANNEL_IN_VOICE_UPLINK | AudioSystem::CHANNEL_IN_VOICE_DNLINK);
811        break;
812    default:
813        break;
814    }
815
816    IOProfile *profile = getInputProfile(device,
817                                         samplingRate,
818                                         format,
819                                         channelMask);
820    if (profile == NULL) {
821        ALOGW("getInput() could not find profile for device %04x, samplingRate %d, format %d,"
822                "channelMask %04x",
823                device, samplingRate, format, channelMask);
824        return 0;
825    }
826
827    if (profile->mModule->mHandle == 0) {
828        ALOGE("getInput(): HW module %s not opened", profile->mModule->mName);
829        return 0;
830    }
831
832    AudioInputDescriptor *inputDesc = new AudioInputDescriptor(profile);
833
834    inputDesc->mInputSource = inputSource;
835    inputDesc->mDevice = device;
836    inputDesc->mSamplingRate = samplingRate;
837    inputDesc->mFormat = (audio_format_t)format;
838    inputDesc->mChannelMask = (audio_channel_mask_t)channelMask;
839    inputDesc->mRefCount = 0;
840    input = mpClientInterface->openInput(profile->mModule->mHandle,
841                                    &inputDesc->mDevice,
842                                    &inputDesc->mSamplingRate,
843                                    &inputDesc->mFormat,
844                                    &inputDesc->mChannelMask);
845
846    // only accept input with the exact requested set of parameters
847    if (input == 0 ||
848        (samplingRate != inputDesc->mSamplingRate) ||
849        (format != inputDesc->mFormat) ||
850        (channelMask != inputDesc->mChannelMask)) {
851        ALOGV("getInput() failed opening input: samplingRate %d, format %d, channelMask %d",
852                samplingRate, format, channelMask);
853        if (input != 0) {
854            mpClientInterface->closeInput(input);
855        }
856        delete inputDesc;
857        return 0;
858    }
859    mInputs.add(input, inputDesc);
860    return input;
861}
862
863status_t AudioPolicyManagerBase::startInput(audio_io_handle_t input)
864{
865    ALOGV("startInput() input %d", input);
866    ssize_t index = mInputs.indexOfKey(input);
867    if (index < 0) {
868        ALOGW("startInput() unknow input %d", input);
869        return BAD_VALUE;
870    }
871    AudioInputDescriptor *inputDesc = mInputs.valueAt(index);
872
873#ifdef AUDIO_POLICY_TEST
874    if (mTestInput == 0)
875#endif //AUDIO_POLICY_TEST
876    {
877        // refuse 2 active AudioRecord clients at the same time
878        if (getActiveInput() != 0) {
879            ALOGW("startInput() input %d failed: other input already started", input);
880            return INVALID_OPERATION;
881        }
882    }
883
884    AudioParameter param = AudioParameter();
885    param.addInt(String8(AudioParameter::keyRouting), (int)inputDesc->mDevice);
886
887    param.addInt(String8(AudioParameter::keyInputSource), (int)inputDesc->mInputSource);
888    ALOGV("AudioPolicyManager::startInput() input source = %d", inputDesc->mInputSource);
889
890    mpClientInterface->setParameters(input, param.toString());
891
892    inputDesc->mRefCount = 1;
893    return NO_ERROR;
894}
895
896status_t AudioPolicyManagerBase::stopInput(audio_io_handle_t input)
897{
898    ALOGV("stopInput() input %d", input);
899    ssize_t index = mInputs.indexOfKey(input);
900    if (index < 0) {
901        ALOGW("stopInput() unknow input %d", input);
902        return BAD_VALUE;
903    }
904    AudioInputDescriptor *inputDesc = mInputs.valueAt(index);
905
906    if (inputDesc->mRefCount == 0) {
907        ALOGW("stopInput() input %d already stopped", input);
908        return INVALID_OPERATION;
909    } else {
910        AudioParameter param = AudioParameter();
911        param.addInt(String8(AudioParameter::keyRouting), 0);
912        mpClientInterface->setParameters(input, param.toString());
913        inputDesc->mRefCount = 0;
914        return NO_ERROR;
915    }
916}
917
918void AudioPolicyManagerBase::releaseInput(audio_io_handle_t input)
919{
920    ALOGV("releaseInput() %d", input);
921    ssize_t index = mInputs.indexOfKey(input);
922    if (index < 0) {
923        ALOGW("releaseInput() releasing unknown input %d", input);
924        return;
925    }
926    mpClientInterface->closeInput(input);
927    delete mInputs.valueAt(index);
928    mInputs.removeItem(input);
929    ALOGV("releaseInput() exit");
930}
931
932void AudioPolicyManagerBase::initStreamVolume(AudioSystem::stream_type stream,
933                                            int indexMin,
934                                            int indexMax)
935{
936    ALOGV("initStreamVolume() stream %d, min %d, max %d", stream , indexMin, indexMax);
937    if (indexMin < 0 || indexMin >= indexMax) {
938        ALOGW("initStreamVolume() invalid index limits for stream %d, min %d, max %d", stream , indexMin, indexMax);
939        return;
940    }
941    mStreams[stream].mIndexMin = indexMin;
942    mStreams[stream].mIndexMax = indexMax;
943}
944
945status_t AudioPolicyManagerBase::setStreamVolumeIndex(AudioSystem::stream_type stream,
946                                                      int index,
947                                                      audio_devices_t device)
948{
949
950    if ((index < mStreams[stream].mIndexMin) || (index > mStreams[stream].mIndexMax)) {
951        return BAD_VALUE;
952    }
953    if (!audio_is_output_device(device)) {
954        return BAD_VALUE;
955    }
956
957    // Force max volume if stream cannot be muted
958    if (!mStreams[stream].mCanBeMuted) index = mStreams[stream].mIndexMax;
959
960    ALOGV("setStreamVolumeIndex() stream %d, device %04x, index %d",
961          stream, device, index);
962
963    // if device is AUDIO_DEVICE_OUT_DEFAULT set default value and
964    // clear all device specific values
965    if (device == AUDIO_DEVICE_OUT_DEFAULT) {
966        mStreams[stream].mIndexCur.clear();
967    }
968    mStreams[stream].mIndexCur.add(device, index);
969
970    // compute and apply stream volume on all outputs according to connected device
971    status_t status = NO_ERROR;
972    for (size_t i = 0; i < mOutputs.size(); i++) {
973        audio_devices_t curDevice =
974                getDeviceForVolume((audio_devices_t)mOutputs.valueAt(i)->device());
975        if (device == curDevice) {
976            status_t volStatus = checkAndSetVolume(stream, index, mOutputs.keyAt(i), curDevice);
977            if (volStatus != NO_ERROR) {
978                status = volStatus;
979            }
980        }
981    }
982    return status;
983}
984
985status_t AudioPolicyManagerBase::getStreamVolumeIndex(AudioSystem::stream_type stream,
986                                                      int *index,
987                                                      audio_devices_t device)
988{
989    if (index == NULL) {
990        return BAD_VALUE;
991    }
992    if (!audio_is_output_device(device)) {
993        return BAD_VALUE;
994    }
995    // if device is AUDIO_DEVICE_OUT_DEFAULT, return volume for device corresponding to
996    // the strategy the stream belongs to.
997    if (device == AUDIO_DEVICE_OUT_DEFAULT) {
998        device = (audio_devices_t)getDeviceForStrategy(getStrategy(stream), true /*fromCache*/);
999    }
1000    device = getDeviceForVolume(device);
1001
1002    *index =  mStreams[stream].getVolumeIndex(device);
1003    ALOGV("getStreamVolumeIndex() stream %d device %08x index %d", stream, device, *index);
1004    return NO_ERROR;
1005}
1006
1007audio_io_handle_t AudioPolicyManagerBase::getOutputForEffect(effect_descriptor_t *desc)
1008{
1009    ALOGV("getOutputForEffect()");
1010    // apply simple rule where global effects are attached to the same output as MUSIC streams
1011
1012    routing_strategy strategy = getStrategy(AudioSystem::MUSIC);
1013    audio_devices_t device = getDeviceForStrategy(strategy, false /*fromCache*/);
1014    SortedVector<audio_io_handle_t> dstOutputs = getOutputsForDevice(device);
1015    int outIdx = 0;
1016    for (size_t i = 0; i < dstOutputs.size(); i++) {
1017        AudioOutputDescriptor *desc = mOutputs.valueFor(dstOutputs[i]);
1018        if (desc->mFlags & AUDIO_OUTPUT_FLAG_DEEP_BUFFER) {
1019            outIdx = i;
1020        }
1021    }
1022    return dstOutputs[outIdx];
1023}
1024
1025status_t AudioPolicyManagerBase::registerEffect(effect_descriptor_t *desc,
1026                                audio_io_handle_t io,
1027                                uint32_t strategy,
1028                                int session,
1029                                int id)
1030{
1031    ssize_t index = mOutputs.indexOfKey(io);
1032    if (index < 0) {
1033        index = mInputs.indexOfKey(io);
1034        if (index < 0) {
1035            ALOGW("registerEffect() unknown io %d", io);
1036            return INVALID_OPERATION;
1037        }
1038    }
1039
1040    if (mTotalEffectsMemory + desc->memoryUsage > getMaxEffectsMemory()) {
1041        ALOGW("registerEffect() memory limit exceeded for Fx %s, Memory %d KB",
1042                desc->name, desc->memoryUsage);
1043        return INVALID_OPERATION;
1044    }
1045    mTotalEffectsMemory += desc->memoryUsage;
1046    ALOGV("registerEffect() effect %s, io %d, strategy %d session %d id %d",
1047            desc->name, io, strategy, session, id);
1048    ALOGV("registerEffect() memory %d, total memory %d", desc->memoryUsage, mTotalEffectsMemory);
1049
1050    EffectDescriptor *pDesc = new EffectDescriptor();
1051    memcpy (&pDesc->mDesc, desc, sizeof(effect_descriptor_t));
1052    pDesc->mIo = io;
1053    pDesc->mStrategy = (routing_strategy)strategy;
1054    pDesc->mSession = session;
1055    pDesc->mEnabled = false;
1056
1057    mEffects.add(id, pDesc);
1058
1059    return NO_ERROR;
1060}
1061
1062status_t AudioPolicyManagerBase::unregisterEffect(int id)
1063{
1064    ssize_t index = mEffects.indexOfKey(id);
1065    if (index < 0) {
1066        ALOGW("unregisterEffect() unknown effect ID %d", id);
1067        return INVALID_OPERATION;
1068    }
1069
1070    EffectDescriptor *pDesc = mEffects.valueAt(index);
1071
1072    setEffectEnabled(pDesc, false);
1073
1074    if (mTotalEffectsMemory < pDesc->mDesc.memoryUsage) {
1075        ALOGW("unregisterEffect() memory %d too big for total %d",
1076                pDesc->mDesc.memoryUsage, mTotalEffectsMemory);
1077        pDesc->mDesc.memoryUsage = mTotalEffectsMemory;
1078    }
1079    mTotalEffectsMemory -= pDesc->mDesc.memoryUsage;
1080    ALOGV("unregisterEffect() effect %s, ID %d, memory %d total memory %d",
1081            pDesc->mDesc.name, id, pDesc->mDesc.memoryUsage, mTotalEffectsMemory);
1082
1083    mEffects.removeItem(id);
1084    delete pDesc;
1085
1086    return NO_ERROR;
1087}
1088
1089status_t AudioPolicyManagerBase::setEffectEnabled(int id, bool enabled)
1090{
1091    ssize_t index = mEffects.indexOfKey(id);
1092    if (index < 0) {
1093        ALOGW("unregisterEffect() unknown effect ID %d", id);
1094        return INVALID_OPERATION;
1095    }
1096
1097    return setEffectEnabled(mEffects.valueAt(index), enabled);
1098}
1099
1100status_t AudioPolicyManagerBase::setEffectEnabled(EffectDescriptor *pDesc, bool enabled)
1101{
1102    if (enabled == pDesc->mEnabled) {
1103        ALOGV("setEffectEnabled(%s) effect already %s",
1104             enabled?"true":"false", enabled?"enabled":"disabled");
1105        return INVALID_OPERATION;
1106    }
1107
1108    if (enabled) {
1109        if (mTotalEffectsCpuLoad + pDesc->mDesc.cpuLoad > getMaxEffectsCpuLoad()) {
1110            ALOGW("setEffectEnabled(true) CPU Load limit exceeded for Fx %s, CPU %f MIPS",
1111                 pDesc->mDesc.name, (float)pDesc->mDesc.cpuLoad/10);
1112            return INVALID_OPERATION;
1113        }
1114        mTotalEffectsCpuLoad += pDesc->mDesc.cpuLoad;
1115        ALOGV("setEffectEnabled(true) total CPU %d", mTotalEffectsCpuLoad);
1116    } else {
1117        if (mTotalEffectsCpuLoad < pDesc->mDesc.cpuLoad) {
1118            ALOGW("setEffectEnabled(false) CPU load %d too high for total %d",
1119                    pDesc->mDesc.cpuLoad, mTotalEffectsCpuLoad);
1120            pDesc->mDesc.cpuLoad = mTotalEffectsCpuLoad;
1121        }
1122        mTotalEffectsCpuLoad -= pDesc->mDesc.cpuLoad;
1123        ALOGV("setEffectEnabled(false) total CPU %d", mTotalEffectsCpuLoad);
1124    }
1125    pDesc->mEnabled = enabled;
1126    return NO_ERROR;
1127}
1128
1129bool AudioPolicyManagerBase::isStreamActive(int stream, uint32_t inPastMs) const
1130{
1131    nsecs_t sysTime = systemTime();
1132    for (size_t i = 0; i < mOutputs.size(); i++) {
1133        if (mOutputs.valueAt(i)->mRefCount[stream] != 0 ||
1134            ns2ms(sysTime - mOutputs.valueAt(i)->mStopTime[stream]) < inPastMs) {
1135            return true;
1136        }
1137    }
1138    return false;
1139}
1140
1141
1142status_t AudioPolicyManagerBase::dump(int fd)
1143{
1144    const size_t SIZE = 256;
1145    char buffer[SIZE];
1146    String8 result;
1147
1148    snprintf(buffer, SIZE, "\nAudioPolicyManager Dump: %p\n", this);
1149    result.append(buffer);
1150
1151    snprintf(buffer, SIZE, " Primary Output: %d\n", mPrimaryOutput);
1152    result.append(buffer);
1153    snprintf(buffer, SIZE, " A2DP device address: %s\n", mA2dpDeviceAddress.string());
1154    result.append(buffer);
1155    snprintf(buffer, SIZE, " SCO device address: %s\n", mScoDeviceAddress.string());
1156    result.append(buffer);
1157    snprintf(buffer, SIZE, " USB audio ALSA %s\n", mUsbCardAndDevice.string());
1158    result.append(buffer);
1159    snprintf(buffer, SIZE, " Output devices: %08x\n", mAvailableOutputDevices);
1160    result.append(buffer);
1161    snprintf(buffer, SIZE, " Input devices: %08x\n", mAvailableInputDevices);
1162    result.append(buffer);
1163    snprintf(buffer, SIZE, " Phone state: %d\n", mPhoneState);
1164    result.append(buffer);
1165    snprintf(buffer, SIZE, " Force use for communications %d\n", mForceUse[AudioSystem::FOR_COMMUNICATION]);
1166    result.append(buffer);
1167    snprintf(buffer, SIZE, " Force use for media %d\n", mForceUse[AudioSystem::FOR_MEDIA]);
1168    result.append(buffer);
1169    snprintf(buffer, SIZE, " Force use for record %d\n", mForceUse[AudioSystem::FOR_RECORD]);
1170    result.append(buffer);
1171    snprintf(buffer, SIZE, " Force use for dock %d\n", mForceUse[AudioSystem::FOR_DOCK]);
1172    result.append(buffer);
1173    write(fd, result.string(), result.size());
1174
1175
1176    snprintf(buffer, SIZE, "\nHW Modules dump:\n");
1177    write(fd, buffer, strlen(buffer));
1178    for (size_t i = 0; i < mHwModules.size(); i++) {
1179        snprintf(buffer, SIZE, "- HW Module %d:\n", i + 1);
1180        write(fd, buffer, strlen(buffer));
1181        mHwModules[i]->dump(fd);
1182    }
1183
1184    snprintf(buffer, SIZE, "\nOutputs dump:\n");
1185    write(fd, buffer, strlen(buffer));
1186    for (size_t i = 0; i < mOutputs.size(); i++) {
1187        snprintf(buffer, SIZE, "- Output %d dump:\n", mOutputs.keyAt(i));
1188        write(fd, buffer, strlen(buffer));
1189        mOutputs.valueAt(i)->dump(fd);
1190    }
1191
1192    snprintf(buffer, SIZE, "\nInputs dump:\n");
1193    write(fd, buffer, strlen(buffer));
1194    for (size_t i = 0; i < mInputs.size(); i++) {
1195        snprintf(buffer, SIZE, "- Input %d dump:\n", mInputs.keyAt(i));
1196        write(fd, buffer, strlen(buffer));
1197        mInputs.valueAt(i)->dump(fd);
1198    }
1199
1200    snprintf(buffer, SIZE, "\nStreams dump:\n");
1201    write(fd, buffer, strlen(buffer));
1202    snprintf(buffer, SIZE,
1203             " Stream  Can be muted  Index Min  Index Max  Index Cur [device : index]...\n");
1204    write(fd, buffer, strlen(buffer));
1205    for (size_t i = 0; i < AudioSystem::NUM_STREAM_TYPES; i++) {
1206        snprintf(buffer, SIZE, " %02d      ", i);
1207        write(fd, buffer, strlen(buffer));
1208        mStreams[i].dump(fd);
1209    }
1210
1211    snprintf(buffer, SIZE, "\nTotal Effects CPU: %f MIPS, Total Effects memory: %d KB\n",
1212            (float)mTotalEffectsCpuLoad/10, mTotalEffectsMemory);
1213    write(fd, buffer, strlen(buffer));
1214
1215    snprintf(buffer, SIZE, "Registered effects:\n");
1216    write(fd, buffer, strlen(buffer));
1217    for (size_t i = 0; i < mEffects.size(); i++) {
1218        snprintf(buffer, SIZE, "- Effect %d dump:\n", mEffects.keyAt(i));
1219        write(fd, buffer, strlen(buffer));
1220        mEffects.valueAt(i)->dump(fd);
1221    }
1222
1223
1224    return NO_ERROR;
1225}
1226
1227// ----------------------------------------------------------------------------
1228// AudioPolicyManagerBase
1229// ----------------------------------------------------------------------------
1230
1231AudioPolicyManagerBase::AudioPolicyManagerBase(AudioPolicyClientInterface *clientInterface)
1232    :
1233#ifdef AUDIO_POLICY_TEST
1234    Thread(false),
1235#endif //AUDIO_POLICY_TEST
1236    mPrimaryOutput((audio_io_handle_t)0),
1237    mAvailableOutputDevices((audio_devices_t)0),
1238    mPhoneState(AudioSystem::MODE_NORMAL),
1239    mLimitRingtoneVolume(false), mLastVoiceVolume(-1.0f),
1240    mTotalEffectsCpuLoad(0), mTotalEffectsMemory(0),
1241    mA2dpSuspended(false), mHasA2dp(false), mHasUsb(false)
1242{
1243    mpClientInterface = clientInterface;
1244
1245    for (int i = 0; i < AudioSystem::NUM_FORCE_USE; i++) {
1246        mForceUse[i] = AudioSystem::FORCE_NONE;
1247    }
1248
1249    initializeVolumeCurves();
1250
1251    mA2dpDeviceAddress = String8("");
1252    mScoDeviceAddress = String8("");
1253    mUsbCardAndDevice = String8("");
1254
1255    if (loadAudioPolicyConfig(AUDIO_POLICY_VENDOR_CONFIG_FILE) != NO_ERROR) {
1256        if (loadAudioPolicyConfig(AUDIO_POLICY_CONFIG_FILE) != NO_ERROR) {
1257            ALOGE("could not load audio policy configuration file, setting defaults");
1258            defaultAudioPolicyConfig();
1259        }
1260    }
1261
1262    // open all output streams needed to access attached devices
1263    for (size_t i = 0; i < mHwModules.size(); i++) {
1264        mHwModules[i]->mHandle = mpClientInterface->loadHwModule(mHwModules[i]->mName);
1265        if (mHwModules[i]->mHandle == 0) {
1266            ALOGW("could not open HW module %s", mHwModules[i]->mName);
1267            continue;
1268        }
1269        // open all output streams needed to access attached devices
1270        for (size_t j = 0; j < mHwModules[i]->mOutputProfiles.size(); j++)
1271        {
1272            const IOProfile *outProfile = mHwModules[i]->mOutputProfiles[j];
1273
1274            if (outProfile->mSupportedDevices & mAttachedOutputDevices) {
1275                AudioOutputDescriptor *outputDesc = new AudioOutputDescriptor(outProfile);
1276                outputDesc->mDevice = (audio_devices_t)(mDefaultOutputDevice &
1277                                                            outProfile->mSupportedDevices);
1278                audio_io_handle_t output = mpClientInterface->openOutput(
1279                                                outProfile->mModule->mHandle,
1280                                                &outputDesc->mDevice,
1281                                                &outputDesc->mSamplingRate,
1282                                                &outputDesc->mFormat,
1283                                                &outputDesc->mChannelMask,
1284                                                &outputDesc->mLatency,
1285                                                outputDesc->mFlags);
1286                if (output == 0) {
1287                    delete outputDesc;
1288                } else {
1289                    mAvailableOutputDevices = (audio_devices_t)(mAvailableOutputDevices |
1290                                            (outProfile->mSupportedDevices & mAttachedOutputDevices));
1291                    if (mPrimaryOutput == 0 &&
1292                            outProfile->mFlags & AUDIO_OUTPUT_FLAG_PRIMARY) {
1293                        mPrimaryOutput = output;
1294                    }
1295                    addOutput(output, outputDesc);
1296                    setOutputDevice(output,
1297                                    (audio_devices_t)(mDefaultOutputDevice &
1298                                                        outProfile->mSupportedDevices),
1299                                    true);
1300                }
1301            }
1302        }
1303    }
1304
1305    ALOGE_IF((mAttachedOutputDevices & ~mAvailableOutputDevices),
1306             "Not output found for attached devices %08x",
1307             (mAttachedOutputDevices & ~mAvailableOutputDevices));
1308
1309    ALOGE_IF((mPrimaryOutput == 0), "Failed to open primary output");
1310
1311    updateDeviceForStrategy();
1312
1313#ifdef AUDIO_POLICY_TEST
1314    if (mPrimaryOutput != 0) {
1315        AudioParameter outputCmd = AudioParameter();
1316        outputCmd.addInt(String8("set_id"), 0);
1317        mpClientInterface->setParameters(mPrimaryOutput, outputCmd.toString());
1318
1319        mTestDevice = AudioSystem::DEVICE_OUT_SPEAKER;
1320        mTestSamplingRate = 44100;
1321        mTestFormat = AudioSystem::PCM_16_BIT;
1322        mTestChannels =  AudioSystem::CHANNEL_OUT_STEREO;
1323        mTestLatencyMs = 0;
1324        mCurOutput = 0;
1325        mDirectOutput = false;
1326        for (int i = 0; i < NUM_TEST_OUTPUTS; i++) {
1327            mTestOutputs[i] = 0;
1328        }
1329
1330        const size_t SIZE = 256;
1331        char buffer[SIZE];
1332        snprintf(buffer, SIZE, "AudioPolicyManagerTest");
1333        run(buffer, ANDROID_PRIORITY_AUDIO);
1334    }
1335#endif //AUDIO_POLICY_TEST
1336}
1337
1338AudioPolicyManagerBase::~AudioPolicyManagerBase()
1339{
1340#ifdef AUDIO_POLICY_TEST
1341    exit();
1342#endif //AUDIO_POLICY_TEST
1343   for (size_t i = 0; i < mOutputs.size(); i++) {
1344        mpClientInterface->closeOutput(mOutputs.keyAt(i));
1345        delete mOutputs.valueAt(i);
1346   }
1347   for (size_t i = 0; i < mInputs.size(); i++) {
1348        mpClientInterface->closeInput(mInputs.keyAt(i));
1349        delete mInputs.valueAt(i);
1350   }
1351   for (size_t i = 0; i < mHwModules.size(); i++) {
1352        delete mHwModules[i];
1353   }
1354}
1355
1356status_t AudioPolicyManagerBase::initCheck()
1357{
1358    return (mPrimaryOutput == 0) ? NO_INIT : NO_ERROR;
1359}
1360
1361#ifdef AUDIO_POLICY_TEST
1362bool AudioPolicyManagerBase::threadLoop()
1363{
1364    ALOGV("entering threadLoop()");
1365    while (!exitPending())
1366    {
1367        String8 command;
1368        int valueInt;
1369        String8 value;
1370
1371        Mutex::Autolock _l(mLock);
1372        mWaitWorkCV.waitRelative(mLock, milliseconds(50));
1373
1374        command = mpClientInterface->getParameters(0, String8("test_cmd_policy"));
1375        AudioParameter param = AudioParameter(command);
1376
1377        if (param.getInt(String8("test_cmd_policy"), valueInt) == NO_ERROR &&
1378            valueInt != 0) {
1379            ALOGV("Test command %s received", command.string());
1380            String8 target;
1381            if (param.get(String8("target"), target) != NO_ERROR) {
1382                target = "Manager";
1383            }
1384            if (param.getInt(String8("test_cmd_policy_output"), valueInt) == NO_ERROR) {
1385                param.remove(String8("test_cmd_policy_output"));
1386                mCurOutput = valueInt;
1387            }
1388            if (param.get(String8("test_cmd_policy_direct"), value) == NO_ERROR) {
1389                param.remove(String8("test_cmd_policy_direct"));
1390                if (value == "false") {
1391                    mDirectOutput = false;
1392                } else if (value == "true") {
1393                    mDirectOutput = true;
1394                }
1395            }
1396            if (param.getInt(String8("test_cmd_policy_input"), valueInt) == NO_ERROR) {
1397                param.remove(String8("test_cmd_policy_input"));
1398                mTestInput = valueInt;
1399            }
1400
1401            if (param.get(String8("test_cmd_policy_format"), value) == NO_ERROR) {
1402                param.remove(String8("test_cmd_policy_format"));
1403                int format = AudioSystem::INVALID_FORMAT;
1404                if (value == "PCM 16 bits") {
1405                    format = AudioSystem::PCM_16_BIT;
1406                } else if (value == "PCM 8 bits") {
1407                    format = AudioSystem::PCM_8_BIT;
1408                } else if (value == "Compressed MP3") {
1409                    format = AudioSystem::MP3;
1410                }
1411                if (format != AudioSystem::INVALID_FORMAT) {
1412                    if (target == "Manager") {
1413                        mTestFormat = format;
1414                    } else if (mTestOutputs[mCurOutput] != 0) {
1415                        AudioParameter outputParam = AudioParameter();
1416                        outputParam.addInt(String8("format"), format);
1417                        mpClientInterface->setParameters(mTestOutputs[mCurOutput], outputParam.toString());
1418                    }
1419                }
1420            }
1421            if (param.get(String8("test_cmd_policy_channels"), value) == NO_ERROR) {
1422                param.remove(String8("test_cmd_policy_channels"));
1423                int channels = 0;
1424
1425                if (value == "Channels Stereo") {
1426                    channels =  AudioSystem::CHANNEL_OUT_STEREO;
1427                } else if (value == "Channels Mono") {
1428                    channels =  AudioSystem::CHANNEL_OUT_MONO;
1429                }
1430                if (channels != 0) {
1431                    if (target == "Manager") {
1432                        mTestChannels = channels;
1433                    } else if (mTestOutputs[mCurOutput] != 0) {
1434                        AudioParameter outputParam = AudioParameter();
1435                        outputParam.addInt(String8("channels"), channels);
1436                        mpClientInterface->setParameters(mTestOutputs[mCurOutput], outputParam.toString());
1437                    }
1438                }
1439            }
1440            if (param.getInt(String8("test_cmd_policy_sampleRate"), valueInt) == NO_ERROR) {
1441                param.remove(String8("test_cmd_policy_sampleRate"));
1442                if (valueInt >= 0 && valueInt <= 96000) {
1443                    int samplingRate = valueInt;
1444                    if (target == "Manager") {
1445                        mTestSamplingRate = samplingRate;
1446                    } else if (mTestOutputs[mCurOutput] != 0) {
1447                        AudioParameter outputParam = AudioParameter();
1448                        outputParam.addInt(String8("sampling_rate"), samplingRate);
1449                        mpClientInterface->setParameters(mTestOutputs[mCurOutput], outputParam.toString());
1450                    }
1451                }
1452            }
1453
1454            if (param.get(String8("test_cmd_policy_reopen"), value) == NO_ERROR) {
1455                param.remove(String8("test_cmd_policy_reopen"));
1456
1457                AudioOutputDescriptor *outputDesc = mOutputs.valueFor(mPrimaryOutput);
1458                mpClientInterface->closeOutput(mPrimaryOutput);
1459
1460                audio_module_handle_t moduleHandle = outputDesc->mModule->mHandle;
1461
1462                delete mOutputs.valueFor(mPrimaryOutput);
1463                mOutputs.removeItem(mPrimaryOutput);
1464
1465                AudioOutputDescriptor *outputDesc = new AudioOutputDescriptor(NULL);
1466                outputDesc->mDevice = (uint32_t)AudioSystem::DEVICE_OUT_SPEAKER;
1467                mPrimaryOutput = mpClientInterface->openOutput(moduleHandle,
1468                                                &outputDesc->mDevice,
1469                                                &outputDesc->mSamplingRate,
1470                                                &outputDesc->mFormat,
1471                                                &outputDesc->mChannelMask,
1472                                                &outputDesc->mLatency,
1473                                                outputDesc->mFlags);
1474                if (mPrimaryOutput == 0) {
1475                    ALOGE("Failed to reopen hardware output stream, samplingRate: %d, format %d, channels %d",
1476                            outputDesc->mSamplingRate, outputDesc->mFormat, outputDesc->mChannelMask);
1477                } else {
1478                    AudioParameter outputCmd = AudioParameter();
1479                    outputCmd.addInt(String8("set_id"), 0);
1480                    mpClientInterface->setParameters(mPrimaryOutput, outputCmd.toString());
1481                    addOutput(mPrimaryOutput, outputDesc);
1482                }
1483            }
1484
1485
1486            mpClientInterface->setParameters(0, String8("test_cmd_policy="));
1487        }
1488    }
1489    return false;
1490}
1491
1492void AudioPolicyManagerBase::exit()
1493{
1494    {
1495        AutoMutex _l(mLock);
1496        requestExit();
1497        mWaitWorkCV.signal();
1498    }
1499    requestExitAndWait();
1500}
1501
1502int AudioPolicyManagerBase::testOutputIndex(audio_io_handle_t output)
1503{
1504    for (int i = 0; i < NUM_TEST_OUTPUTS; i++) {
1505        if (output == mTestOutputs[i]) return i;
1506    }
1507    return 0;
1508}
1509#endif //AUDIO_POLICY_TEST
1510
1511// ---
1512
1513void AudioPolicyManagerBase::addOutput(audio_io_handle_t id, AudioOutputDescriptor *outputDesc)
1514{
1515    outputDesc->mId = id;
1516    mOutputs.add(id, outputDesc);
1517}
1518
1519
1520status_t AudioPolicyManagerBase::checkOutputsForDevice(audio_devices_t device,
1521                                                       AudioSystem::device_connection_state state,
1522                                                       SortedVector<audio_io_handle_t>& outputs)
1523{
1524    AudioOutputDescriptor *desc;
1525
1526    if (state == AudioSystem::DEVICE_STATE_AVAILABLE) {
1527        // first list already open outputs that can be routed to this device
1528        for (size_t i = 0; i < mOutputs.size(); i++) {
1529            desc = mOutputs.valueAt(i);
1530            if (!desc->isDuplicated() && (desc->mProfile->mSupportedDevices & device)) {
1531                ALOGV("checkOutputsForDevice(): adding opened output %d", mOutputs.keyAt(i));
1532                outputs.add(mOutputs.keyAt(i));
1533            }
1534        }
1535        // then look for output profiles that can be routed to this device
1536        SortedVector<IOProfile *> profiles;
1537        for (size_t i = 0; i < mHwModules.size(); i++)
1538        {
1539            if (mHwModules[i]->mHandle == 0) {
1540                continue;
1541            }
1542            for (size_t j = 0; j < mHwModules[i]->mOutputProfiles.size(); j++)
1543            {
1544                if (mHwModules[i]->mOutputProfiles[j]->mSupportedDevices & device) {
1545                    ALOGV("checkOutputsForDevice(): adding profile %d from module %d", j, i);
1546                    profiles.add(mHwModules[i]->mOutputProfiles[j]);
1547                }
1548            }
1549        }
1550
1551        if (profiles.isEmpty() && outputs.isEmpty()) {
1552            ALOGW("checkOutputsForDevice(): No output available for device %04x", device);
1553            return BAD_VALUE;
1554        }
1555
1556        // open outputs for matching profiles if needed. Direct outputs are also opened to
1557        // query for dynamic parameters and will be closed later by setDeviceConnectionState()
1558        for (ssize_t profile_index = 0; profile_index < (ssize_t)profiles.size(); profile_index++) {
1559            IOProfile *profile = profiles[profile_index];
1560
1561            // nothing to do if one output is already opened for this profile
1562            size_t j;
1563            for (j = 0; j < outputs.size(); j++) {
1564                desc = mOutputs.valueAt(j);
1565                if (!desc->isDuplicated() && desc->mProfile == profile) {
1566                    break;
1567                }
1568            }
1569            if (j != outputs.size()) {
1570                continue;
1571            }
1572
1573            ALOGV("opening output for device %08x", device);
1574            desc = new AudioOutputDescriptor(profile);
1575            desc->mDevice = device;
1576            audio_io_handle_t output = mpClientInterface->openOutput(profile->mModule->mHandle,
1577                                                                       &desc->mDevice,
1578                                                                       &desc->mSamplingRate,
1579                                                                       &desc->mFormat,
1580                                                                       &desc->mChannelMask,
1581                                                                       &desc->mLatency,
1582                                                                       desc->mFlags);
1583            if (output != 0) {
1584                if (desc->mFlags & AUDIO_OUTPUT_FLAG_DIRECT) {
1585                    String8 reply;
1586                    char *value;
1587                    if (profile->mSamplingRates[0] == 0) {
1588                        reply = mpClientInterface->getParameters(output,
1589                                                String8(AUDIO_PARAMETER_STREAM_SUP_SAMPLING_RATES));
1590                        ALOGV("checkOutputsForDevice() direct output sup sampling rates %s",
1591                                  reply.string());
1592                        value = strpbrk((char *)reply.string(), "=");
1593                        if (value != NULL) {
1594                            loadSamplingRates(value, profile);
1595                        }
1596                    }
1597                    if (profile->mFormats[0] == 0) {
1598                        reply = mpClientInterface->getParameters(output,
1599                                                       String8(AUDIO_PARAMETER_STREAM_SUP_FORMATS));
1600                        ALOGV("checkOutputsForDevice() direct output sup formats %s",
1601                                  reply.string());
1602                        value = strpbrk((char *)reply.string(), "=");
1603                        if (value != NULL) {
1604                            loadFormats(value, profile);
1605                        }
1606                    }
1607                    if (profile->mChannelMasks[0] == 0) {
1608                        reply = mpClientInterface->getParameters(output,
1609                                                      String8(AUDIO_PARAMETER_STREAM_SUP_CHANNELS));
1610                        ALOGV("checkOutputsForDevice() direct output sup channel masks %s",
1611                                  reply.string());
1612                        value = strpbrk((char *)reply.string(), "=");
1613                        if (value != NULL) {
1614                            loadOutChannels(value + 1, profile);
1615                        }
1616                    }
1617                    if (((profile->mSamplingRates[0] == 0) &&
1618                             (profile->mSamplingRates.size() < 2)) ||
1619                         ((profile->mFormats[0] == 0) &&
1620                             (profile->mFormats.size() < 2)) ||
1621                         ((profile->mFormats[0] == 0) &&
1622                             (profile->mChannelMasks.size() < 2))) {
1623                        ALOGW("checkOutputsForDevice() direct output missing param");
1624                        output = 0;
1625                    } else {
1626                        addOutput(output, desc);
1627                    }
1628                } else {
1629                    audio_io_handle_t duplicatedOutput = 0;
1630                    // add output descriptor
1631                    addOutput(output, desc);
1632                    // set initial stream volume for device
1633                    applyStreamVolumes(output, device, 0, true);
1634
1635                    //TODO: configure audio effect output stage here
1636
1637                    // open a duplicating output thread for the new output and the primary output
1638                    duplicatedOutput = mpClientInterface->openDuplicateOutput(output,
1639                                                                              mPrimaryOutput);
1640                    if (duplicatedOutput != 0) {
1641                        // add duplicated output descriptor
1642                        AudioOutputDescriptor *dupOutputDesc = new AudioOutputDescriptor(NULL);
1643                        dupOutputDesc->mOutput1 = mOutputs.valueFor(mPrimaryOutput);
1644                        dupOutputDesc->mOutput2 = mOutputs.valueFor(output);
1645                        dupOutputDesc->mSamplingRate = desc->mSamplingRate;
1646                        dupOutputDesc->mFormat = desc->mFormat;
1647                        dupOutputDesc->mChannelMask = desc->mChannelMask;
1648                        dupOutputDesc->mLatency = desc->mLatency;
1649                        addOutput(duplicatedOutput, dupOutputDesc);
1650                        applyStreamVolumes(duplicatedOutput, device, 0, true);
1651                    } else {
1652                        ALOGW("checkOutputsForDevice() could not open dup output for %d and %d",
1653                                mPrimaryOutput, output);
1654                        mpClientInterface->closeOutput(output);
1655                        mOutputs.removeItem(output);
1656                        output = 0;
1657                    }
1658                }
1659            }
1660            if (output == 0) {
1661                ALOGW("checkOutputsForDevice() could not open output for device %x", device);
1662                delete desc;
1663                profiles.removeAt(profile_index);
1664                profile_index--;
1665            } else {
1666                outputs.add(output);
1667                ALOGV("checkOutputsForDevice(): adding output %d", output);
1668            }
1669        }
1670
1671        if (profiles.isEmpty()) {
1672            ALOGW("checkOutputsForDevice(): No output available for device %04x", device);
1673            return BAD_VALUE;
1674        }
1675    } else {
1676        // check if one opened output is not needed any more after disconnecting one device
1677        for (size_t i = 0; i < mOutputs.size(); i++) {
1678            desc = mOutputs.valueAt(i);
1679            if (!desc->isDuplicated() &&
1680                    !(desc->mProfile->mSupportedDevices & mAvailableOutputDevices)) {
1681                ALOGV("checkOutputsForDevice(): disconnecting adding output %d", mOutputs.keyAt(i));
1682                outputs.add(mOutputs.keyAt(i));
1683            }
1684        }
1685        for (size_t i = 0; i < mHwModules.size(); i++)
1686        {
1687            if (mHwModules[i]->mHandle == 0) {
1688                continue;
1689            }
1690            for (size_t j = 0; j < mHwModules[i]->mOutputProfiles.size(); j++)
1691            {
1692                IOProfile *profile = mHwModules[i]->mOutputProfiles[j];
1693                if ((profile->mSupportedDevices & device) &&
1694                        (profile->mFlags & AUDIO_OUTPUT_FLAG_DIRECT)) {
1695                    ALOGV("checkOutputsForDevice(): clearing direct output profile %d on module %d",
1696                          j, i);
1697                    if (profile->mSamplingRates[0] == 0) {
1698                        profile->mSamplingRates.clear();
1699                        profile->mSamplingRates.add(0);
1700                    }
1701                    if (profile->mFormats[0] == 0) {
1702                        profile->mFormats.clear();
1703                        profile->mFormats.add((audio_format_t)0);
1704                    }
1705                    if (profile->mChannelMasks[0] == 0) {
1706                        profile->mChannelMasks.clear();
1707                        profile->mChannelMasks.add((audio_channel_mask_t)0);
1708                    }
1709                }
1710            }
1711        }
1712    }
1713    return NO_ERROR;
1714}
1715
1716void AudioPolicyManagerBase::closeOutput(audio_io_handle_t output)
1717{
1718    ALOGV("closeOutput(%d)", output);
1719
1720    AudioOutputDescriptor *outputDesc = mOutputs.valueFor(output);
1721    if (outputDesc == NULL) {
1722        ALOGW("closeOutput() unknown output %d", output);
1723        return;
1724    }
1725
1726    // look for duplicated outputs connected to the output being removed.
1727    for (size_t i = 0; i < mOutputs.size(); i++) {
1728        AudioOutputDescriptor *dupOutputDesc = mOutputs.valueAt(i);
1729        if (dupOutputDesc->isDuplicated() &&
1730                (dupOutputDesc->mOutput1 == outputDesc ||
1731                dupOutputDesc->mOutput2 == outputDesc)) {
1732            AudioOutputDescriptor *outputDesc2;
1733            if (dupOutputDesc->mOutput1 == outputDesc) {
1734                outputDesc2 = dupOutputDesc->mOutput2;
1735            } else {
1736                outputDesc2 = dupOutputDesc->mOutput1;
1737            }
1738            // As all active tracks on duplicated output will be deleted,
1739            // and as they were also referenced on the other output, the reference
1740            // count for their stream type must be adjusted accordingly on
1741            // the other output.
1742            for (int j = 0; j < (int)AudioSystem::NUM_STREAM_TYPES; j++) {
1743                int refCount = dupOutputDesc->mRefCount[j];
1744                outputDesc2->changeRefCount((AudioSystem::stream_type)j,-refCount);
1745            }
1746            audio_io_handle_t duplicatedOutput = mOutputs.keyAt(i);
1747            ALOGV("closeOutput() closing also duplicated output %d", duplicatedOutput);
1748
1749            mpClientInterface->closeOutput(duplicatedOutput);
1750            delete mOutputs.valueFor(duplicatedOutput);
1751            mOutputs.removeItem(duplicatedOutput);
1752        }
1753    }
1754
1755    AudioParameter param;
1756    param.add(String8("closing"), String8("true"));
1757    mpClientInterface->setParameters(output, param.toString());
1758
1759    mpClientInterface->closeOutput(output);
1760    delete mOutputs.valueFor(output);
1761    mOutputs.removeItem(output);
1762}
1763
1764SortedVector<audio_io_handle_t> AudioPolicyManagerBase::getOutputsForDevice(audio_devices_t device)
1765{
1766    SortedVector<audio_io_handle_t> outputs;
1767
1768    ALOGVV("getOutputsForDevice() device %04x", device);
1769    for (size_t i = 0; i < mOutputs.size(); i++) {
1770        ALOGVV("output %d isDuplicated=%d device=%04x",
1771                i, mOutputs.valueAt(i)->isDuplicated(), mOutputs.valueAt(i)->supportedDevices());
1772        if ((device & mOutputs.valueAt(i)->supportedDevices()) == device) {
1773            ALOGVV("getOutputsForDevice() found output %d", mOutputs.keyAt(i));
1774            outputs.add(mOutputs.keyAt(i));
1775        }
1776    }
1777    return outputs;
1778}
1779
1780bool AudioPolicyManagerBase::vectorsEqual(SortedVector<audio_io_handle_t>& outputs1,
1781                                   SortedVector<audio_io_handle_t>& outputs2)
1782{
1783    if (outputs1.size() != outputs2.size()) {
1784        return false;
1785    }
1786    for (size_t i = 0; i < outputs1.size(); i++) {
1787        if (outputs1[i] != outputs2[i]) {
1788            return false;
1789        }
1790    }
1791    return true;
1792}
1793
1794void AudioPolicyManagerBase::checkOutputForStrategy(routing_strategy strategy)
1795{
1796    audio_devices_t oldDevice = getDeviceForStrategy(strategy, true /*fromCache*/);
1797    audio_devices_t newDevice = getDeviceForStrategy(strategy, false /*fromCache*/);
1798    SortedVector<audio_io_handle_t> srcOutputs = getOutputsForDevice(oldDevice);
1799    SortedVector<audio_io_handle_t> dstOutputs = getOutputsForDevice(newDevice);
1800
1801    if (!vectorsEqual(srcOutputs,dstOutputs)) {
1802        ALOGV("checkOutputForStrategy() strategy %d, moving from output %d to output %d",
1803              strategy, srcOutputs[0], dstOutputs[0]);
1804        // mute strategy while moving tracks from one output to another
1805        for (size_t i = 0; i < srcOutputs.size(); i++) {
1806            AudioOutputDescriptor *desc = mOutputs.valueFor(srcOutputs[i]);
1807            if (desc->strategyRefCount(strategy) != 0) {
1808                setStrategyMute(strategy, true, srcOutputs[i]);
1809                setStrategyMute(strategy, false, srcOutputs[i], MUTE_TIME_MS, newDevice);
1810            }
1811        }
1812
1813        // Move effects associated to this strategy from previous output to new output
1814        if (strategy == STRATEGY_MEDIA) {
1815            int outIdx = 0;
1816            for (size_t i = 0; i < dstOutputs.size(); i++) {
1817                AudioOutputDescriptor *desc = mOutputs.valueFor(dstOutputs[i]);
1818                if (desc->mFlags & AUDIO_OUTPUT_FLAG_DEEP_BUFFER) {
1819                    outIdx = i;
1820                }
1821            }
1822            SortedVector<audio_io_handle_t> moved;
1823            for (size_t i = 0; i < mEffects.size(); i++) {
1824                EffectDescriptor *desc = mEffects.valueAt(i);
1825                if (desc->mSession == AUDIO_SESSION_OUTPUT_MIX &&
1826                        desc->mIo != dstOutputs[outIdx]) {
1827                    if (moved.indexOf(desc->mIo) < 0) {
1828                        ALOGV("checkOutputForStrategy() moving effect %d to output %d",
1829                              mEffects.keyAt(i), dstOutputs[outIdx]);
1830                        mpClientInterface->moveEffects(AUDIO_SESSION_OUTPUT_MIX, desc->mIo,
1831                                                       dstOutputs[outIdx]);
1832                        moved.add(desc->mIo);
1833                    }
1834                    desc->mIo = dstOutputs[outIdx];
1835                }
1836            }
1837        }
1838        // Move tracks associated to this strategy from previous output to new output
1839        for (int i = 0; i < (int)AudioSystem::NUM_STREAM_TYPES; i++) {
1840            if (getStrategy((AudioSystem::stream_type)i) == strategy) {
1841                //FIXME see fixme on name change
1842                mpClientInterface->setStreamOutput((AudioSystem::stream_type)i,
1843                                                   dstOutputs[0] /* ignored */);
1844            }
1845        }
1846    }
1847}
1848
1849void AudioPolicyManagerBase::checkOutputForAllStrategies()
1850{
1851    checkOutputForStrategy(STRATEGY_ENFORCED_AUDIBLE);
1852    checkOutputForStrategy(STRATEGY_PHONE);
1853    checkOutputForStrategy(STRATEGY_SONIFICATION);
1854    checkOutputForStrategy(STRATEGY_SONIFICATION_RESPECTFUL);
1855    checkOutputForStrategy(STRATEGY_MEDIA);
1856    checkOutputForStrategy(STRATEGY_DTMF);
1857}
1858
1859audio_io_handle_t AudioPolicyManagerBase::getA2dpOutput()
1860{
1861    if (!mHasA2dp) {
1862        return 0;
1863    }
1864
1865    for (size_t i = 0; i < mOutputs.size(); i++) {
1866        AudioOutputDescriptor *outputDesc = mOutputs.valueAt(i);
1867        if (!outputDesc->isDuplicated() && outputDesc->device() & AUDIO_DEVICE_OUT_ALL_A2DP) {
1868            return mOutputs.keyAt(i);
1869        }
1870    }
1871
1872    return 0;
1873}
1874
1875void AudioPolicyManagerBase::checkA2dpSuspend()
1876{
1877    if (!mHasA2dp) {
1878        return;
1879    }
1880    audio_io_handle_t a2dpOutput = getA2dpOutput();
1881    if (a2dpOutput == 0) {
1882        return;
1883    }
1884
1885    // suspend A2DP output if:
1886    //      (NOT already suspended) &&
1887    //      ((SCO device is connected &&
1888    //       (forced usage for communication || for record is SCO))) ||
1889    //      (phone state is ringing || in call)
1890    //
1891    // restore A2DP output if:
1892    //      (Already suspended) &&
1893    //      ((SCO device is NOT connected ||
1894    //       (forced usage NOT for communication && NOT for record is SCO))) &&
1895    //      (phone state is NOT ringing && NOT in call)
1896    //
1897    if (mA2dpSuspended) {
1898        if (((mScoDeviceAddress == "") ||
1899             ((mForceUse[AudioSystem::FOR_COMMUNICATION] != AudioSystem::FORCE_BT_SCO) &&
1900              (mForceUse[AudioSystem::FOR_RECORD] != AudioSystem::FORCE_BT_SCO))) &&
1901             ((mPhoneState != AudioSystem::MODE_IN_CALL) &&
1902              (mPhoneState != AudioSystem::MODE_RINGTONE))) {
1903
1904            mpClientInterface->restoreOutput(a2dpOutput);
1905            mA2dpSuspended = false;
1906        }
1907    } else {
1908        if (((mScoDeviceAddress != "") &&
1909             ((mForceUse[AudioSystem::FOR_COMMUNICATION] == AudioSystem::FORCE_BT_SCO) ||
1910              (mForceUse[AudioSystem::FOR_RECORD] == AudioSystem::FORCE_BT_SCO))) ||
1911             ((mPhoneState == AudioSystem::MODE_IN_CALL) ||
1912              (mPhoneState == AudioSystem::MODE_RINGTONE))) {
1913
1914            mpClientInterface->suspendOutput(a2dpOutput);
1915            mA2dpSuspended = true;
1916        }
1917    }
1918}
1919
1920audio_devices_t AudioPolicyManagerBase::getNewDevice(audio_io_handle_t output, bool fromCache)
1921{
1922    audio_devices_t device = (audio_devices_t)0;
1923
1924    AudioOutputDescriptor *outputDesc = mOutputs.valueFor(output);
1925    // check the following by order of priority to request a routing change if necessary:
1926    // 1: the strategy enforced audible is active on the output:
1927    //      use device for strategy enforced audible
1928    // 2: we are in call or the strategy phone is active on the output:
1929    //      use device for strategy phone
1930    // 3: the strategy sonification is active on the output:
1931    //      use device for strategy sonification
1932    // 4: the strategy "respectful" sonification is active on the output:
1933    //      use device for strategy "respectful" sonification
1934    // 5: the strategy media is active on the output:
1935    //      use device for strategy media
1936    // 6: the strategy DTMF is active on the output:
1937    //      use device for strategy DTMF
1938    if (outputDesc->isUsedByStrategy(STRATEGY_ENFORCED_AUDIBLE)) {
1939        device = getDeviceForStrategy(STRATEGY_ENFORCED_AUDIBLE, fromCache);
1940    } else if (isInCall() ||
1941                    outputDesc->isUsedByStrategy(STRATEGY_PHONE)) {
1942        device = getDeviceForStrategy(STRATEGY_PHONE, fromCache);
1943    } else if (outputDesc->isUsedByStrategy(STRATEGY_SONIFICATION)) {
1944        device = getDeviceForStrategy(STRATEGY_SONIFICATION, fromCache);
1945    } else if (outputDesc->isUsedByStrategy(STRATEGY_SONIFICATION_RESPECTFUL)) {
1946        device = getDeviceForStrategy(STRATEGY_SONIFICATION_RESPECTFUL, fromCache);
1947    } else if (outputDesc->isUsedByStrategy(STRATEGY_MEDIA)) {
1948        device = getDeviceForStrategy(STRATEGY_MEDIA, fromCache);
1949    } else if (outputDesc->isUsedByStrategy(STRATEGY_DTMF)) {
1950        device = getDeviceForStrategy(STRATEGY_DTMF, fromCache);
1951    }
1952
1953    ALOGV("getNewDevice() selected device %x", device);
1954    return device;
1955}
1956
1957uint32_t AudioPolicyManagerBase::getStrategyForStream(AudioSystem::stream_type stream) {
1958    return (uint32_t)getStrategy(stream);
1959}
1960
1961audio_devices_t AudioPolicyManagerBase::getDevicesForStream(AudioSystem::stream_type stream) {
1962    audio_devices_t devices;
1963    // By checking the range of stream before calling getStrategy, we avoid
1964    // getStrategy's behavior for invalid streams.  getStrategy would do a ALOGE
1965    // and then return STRATEGY_MEDIA, but we want to return the empty set.
1966    if (stream < (AudioSystem::stream_type) 0 || stream >= AudioSystem::NUM_STREAM_TYPES) {
1967        devices = (audio_devices_t)0;
1968    } else {
1969        AudioPolicyManagerBase::routing_strategy strategy = getStrategy(stream);
1970        devices = getDeviceForStrategy(strategy, true /*fromCache*/);
1971    }
1972    return devices;
1973}
1974
1975AudioPolicyManagerBase::routing_strategy AudioPolicyManagerBase::getStrategy(
1976        AudioSystem::stream_type stream) {
1977    // stream to strategy mapping
1978    switch (stream) {
1979    case AudioSystem::VOICE_CALL:
1980    case AudioSystem::BLUETOOTH_SCO:
1981        return STRATEGY_PHONE;
1982    case AudioSystem::RING:
1983    case AudioSystem::ALARM:
1984        return STRATEGY_SONIFICATION;
1985    case AudioSystem::NOTIFICATION:
1986        return STRATEGY_SONIFICATION_RESPECTFUL;
1987    case AudioSystem::DTMF:
1988        return STRATEGY_DTMF;
1989    default:
1990        ALOGE("unknown stream type");
1991    case AudioSystem::SYSTEM:
1992        // NOTE: SYSTEM stream uses MEDIA strategy because muting music and switching outputs
1993        // while key clicks are played produces a poor result
1994    case AudioSystem::TTS:
1995    case AudioSystem::MUSIC:
1996        return STRATEGY_MEDIA;
1997    case AudioSystem::ENFORCED_AUDIBLE:
1998        return STRATEGY_ENFORCED_AUDIBLE;
1999    }
2000}
2001
2002void AudioPolicyManagerBase::handleNotificationRoutingForStream(AudioSystem::stream_type stream) {
2003    switch(stream) {
2004    case AudioSystem::MUSIC:
2005        checkOutputForStrategy(STRATEGY_SONIFICATION_RESPECTFUL);
2006        updateDeviceForStrategy();
2007        break;
2008    default:
2009        break;
2010    }
2011}
2012
2013audio_devices_t AudioPolicyManagerBase::getDeviceForStrategy(routing_strategy strategy,
2014                                                             bool fromCache)
2015{
2016    uint32_t device = 0;
2017
2018    if (fromCache) {
2019        ALOGVV("getDeviceForStrategy() from cache strategy %d, device %x",
2020              strategy, mDeviceForStrategy[strategy]);
2021        return mDeviceForStrategy[strategy];
2022    }
2023
2024    switch (strategy) {
2025
2026    case STRATEGY_SONIFICATION_RESPECTFUL:
2027        if (isInCall()) {
2028            device = getDeviceForStrategy(STRATEGY_SONIFICATION, false /*fromCache*/);
2029        } else if (isStreamActive(AudioSystem::MUSIC, SONIFICATION_RESPECTFUL_AFTER_MUSIC_DELAY)) {
2030            // while media is playing (or has recently played), use the same device
2031            device = getDeviceForStrategy(STRATEGY_MEDIA, false /*fromCache*/);
2032        } else {
2033            // when media is not playing anymore, fall back on the sonification behavior
2034            device = getDeviceForStrategy(STRATEGY_SONIFICATION, false /*fromCache*/);
2035        }
2036
2037        break;
2038
2039    case STRATEGY_DTMF:
2040        if (!isInCall()) {
2041            // when off call, DTMF strategy follows the same rules as MEDIA strategy
2042            device = getDeviceForStrategy(STRATEGY_MEDIA, false /*fromCache*/);
2043            break;
2044        }
2045        // when in call, DTMF and PHONE strategies follow the same rules
2046        // FALL THROUGH
2047
2048    case STRATEGY_PHONE:
2049        // for phone strategy, we first consider the forced use and then the available devices by order
2050        // of priority
2051        switch (mForceUse[AudioSystem::FOR_COMMUNICATION]) {
2052        case AudioSystem::FORCE_BT_SCO:
2053            if (!isInCall() || strategy != STRATEGY_DTMF) {
2054                device = mAvailableOutputDevices & AudioSystem::DEVICE_OUT_BLUETOOTH_SCO_CARKIT;
2055                if (device) break;
2056            }
2057            device = mAvailableOutputDevices & AudioSystem::DEVICE_OUT_BLUETOOTH_SCO_HEADSET;
2058            if (device) break;
2059            device = mAvailableOutputDevices & AudioSystem::DEVICE_OUT_BLUETOOTH_SCO;
2060            if (device) break;
2061            // if SCO device is requested but no SCO device is available, fall back to default case
2062            // FALL THROUGH
2063
2064        default:    // FORCE_NONE
2065            // when not in a phone call, phone strategy should route STREAM_VOICE_CALL to A2DP
2066            if (mHasA2dp && !isInCall() &&
2067                    (mForceUse[AudioSystem::FOR_MEDIA] != AudioSystem::FORCE_NO_BT_A2DP) &&
2068                    (getA2dpOutput() != 0) && !mA2dpSuspended) {
2069                device = mAvailableOutputDevices & AudioSystem::DEVICE_OUT_BLUETOOTH_A2DP;
2070                if (device) break;
2071                device = mAvailableOutputDevices & AudioSystem::DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES;
2072                if (device) break;
2073            }
2074            device = mAvailableOutputDevices & AudioSystem::DEVICE_OUT_WIRED_HEADPHONE;
2075            if (device) break;
2076            device = mAvailableOutputDevices & AudioSystem::DEVICE_OUT_WIRED_HEADSET;
2077            if (device) break;
2078            device = mAvailableOutputDevices & AUDIO_DEVICE_OUT_USB_ACCESSORY;
2079            if (device) break;
2080            device = mAvailableOutputDevices & AUDIO_DEVICE_OUT_USB_DEVICE;
2081            if (device) break;
2082            device = mAvailableOutputDevices & AudioSystem::DEVICE_OUT_DGTL_DOCK_HEADSET;
2083            if (device) break;
2084            device = mAvailableOutputDevices & AudioSystem::DEVICE_OUT_AUX_DIGITAL;
2085            if (device) break;
2086            device = mAvailableOutputDevices & AudioSystem::DEVICE_OUT_ANLG_DOCK_HEADSET;
2087            if (device) break;
2088            device = mAvailableOutputDevices & AudioSystem::DEVICE_OUT_EARPIECE;
2089            if (device) break;
2090            device = mDefaultOutputDevice;
2091            if (device == 0) {
2092                ALOGE("getDeviceForStrategy() no device found for STRATEGY_PHONE");
2093            }
2094            break;
2095
2096        case AudioSystem::FORCE_SPEAKER:
2097            // when not in a phone call, phone strategy should route STREAM_VOICE_CALL to
2098            // A2DP speaker when forcing to speaker output
2099            if (mHasA2dp && !isInCall() &&
2100                    (mForceUse[AudioSystem::FOR_MEDIA] != AudioSystem::FORCE_NO_BT_A2DP) &&
2101                    (getA2dpOutput() != 0) && !mA2dpSuspended) {
2102                device = mAvailableOutputDevices & AudioSystem::DEVICE_OUT_BLUETOOTH_A2DP_SPEAKER;
2103                if (device) break;
2104            }
2105            device = mAvailableOutputDevices & AUDIO_DEVICE_OUT_USB_ACCESSORY;
2106            if (device) break;
2107            device = mAvailableOutputDevices & AUDIO_DEVICE_OUT_USB_DEVICE;
2108            if (device) break;
2109            device = mAvailableOutputDevices & AudioSystem::DEVICE_OUT_DGTL_DOCK_HEADSET;
2110            if (device) break;
2111            device = mAvailableOutputDevices & AudioSystem::DEVICE_OUT_AUX_DIGITAL;
2112            if (device) break;
2113            device = mAvailableOutputDevices & AudioSystem::DEVICE_OUT_ANLG_DOCK_HEADSET;
2114            if (device) break;
2115            device = mAvailableOutputDevices & AudioSystem::DEVICE_OUT_SPEAKER;
2116            if (device) break;
2117            device = mDefaultOutputDevice;
2118            if (device == 0) {
2119                ALOGE("getDeviceForStrategy() no device found for STRATEGY_PHONE, FORCE_SPEAKER");
2120            }
2121            break;
2122        }
2123    break;
2124
2125    case STRATEGY_SONIFICATION:
2126
2127        // If incall, just select the STRATEGY_PHONE device: The rest of the behavior is handled by
2128        // handleIncallSonification().
2129        if (isInCall()) {
2130            device = getDeviceForStrategy(STRATEGY_PHONE, false /*fromCache*/);
2131            break;
2132        }
2133        // FALL THROUGH
2134
2135    case STRATEGY_ENFORCED_AUDIBLE:
2136        // strategy STRATEGY_ENFORCED_AUDIBLE uses same routing policy as STRATEGY_SONIFICATION
2137        // except:
2138        //   - when in call where it doesn't default to STRATEGY_PHONE behavior
2139        //   - in countries where not enforced in which case it follows STRATEGY_MEDIA
2140
2141        if (strategy == STRATEGY_SONIFICATION ||
2142                !mStreams[AUDIO_STREAM_ENFORCED_AUDIBLE].mCanBeMuted) {
2143            device = mAvailableOutputDevices & AudioSystem::DEVICE_OUT_SPEAKER;
2144            if (device == 0) {
2145                ALOGE("getDeviceForStrategy() speaker device not found for STRATEGY_SONIFICATION");
2146            }
2147        }
2148        // The second device used for sonification is the same as the device used by media strategy
2149        // FALL THROUGH
2150
2151    case STRATEGY_MEDIA: {
2152        uint32_t device2 = 0;
2153        if (mHasA2dp && (mForceUse[AudioSystem::FOR_MEDIA] != AudioSystem::FORCE_NO_BT_A2DP) &&
2154                (getA2dpOutput() != 0) && !mA2dpSuspended) {
2155            device2 = mAvailableOutputDevices & AudioSystem::DEVICE_OUT_BLUETOOTH_A2DP;
2156            if (device2 == 0) {
2157                device2 = mAvailableOutputDevices & AudioSystem::DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES;
2158            }
2159            if (device2 == 0) {
2160                device2 = mAvailableOutputDevices & AudioSystem::DEVICE_OUT_BLUETOOTH_A2DP_SPEAKER;
2161            }
2162        }
2163        if (device2 == 0) {
2164            device2 = mAvailableOutputDevices & AudioSystem::DEVICE_OUT_WIRED_HEADPHONE;
2165        }
2166        if (device2 == 0) {
2167            device2 = mAvailableOutputDevices & AudioSystem::DEVICE_OUT_WIRED_HEADSET;
2168        }
2169        if (device2 == 0) {
2170            device2 = mAvailableOutputDevices & AUDIO_DEVICE_OUT_USB_ACCESSORY;
2171        }
2172        if (device2 == 0) {
2173            device2 = mAvailableOutputDevices & AUDIO_DEVICE_OUT_USB_DEVICE;
2174        }
2175        if (device2 == 0) {
2176            device2 = mAvailableOutputDevices & AudioSystem::DEVICE_OUT_DGTL_DOCK_HEADSET;
2177        }
2178        if (device2 == 0) {
2179            device2 = mAvailableOutputDevices & AudioSystem::DEVICE_OUT_AUX_DIGITAL;
2180        }
2181        if (device2 == 0) {
2182            device2 = mAvailableOutputDevices & AudioSystem::DEVICE_OUT_ANLG_DOCK_HEADSET;
2183        }
2184        if (device2 == 0) {
2185            device2 = mAvailableOutputDevices & AudioSystem::DEVICE_OUT_SPEAKER;
2186        }
2187
2188        // device is DEVICE_OUT_SPEAKER if we come from case STRATEGY_SONIFICATION or
2189        // STRATEGY_ENFORCED_AUDIBLE, 0 otherwise
2190        device |= device2;
2191        if (device) break;
2192        device = mDefaultOutputDevice;
2193        if (device == 0) {
2194            ALOGE("getDeviceForStrategy() no device found for STRATEGY_MEDIA");
2195        }
2196        } break;
2197
2198    default:
2199        ALOGW("getDeviceForStrategy() unknown strategy: %d", strategy);
2200        break;
2201    }
2202
2203    ALOGVV("getDeviceForStrategy() strategy %d, device %x", strategy, device);
2204    return (audio_devices_t)device;
2205}
2206
2207void AudioPolicyManagerBase::updateDeviceForStrategy()
2208{
2209    for (int i = 0; i < NUM_STRATEGIES; i++) {
2210        mDeviceForStrategy[i] = getDeviceForStrategy((routing_strategy)i, false /*fromCache*/);
2211    }
2212}
2213
2214uint32_t AudioPolicyManagerBase::checkDeviceMuteStrategies(AudioOutputDescriptor *outputDesc,
2215                                                       audio_devices_t prevDevice,
2216                                                       uint32_t delayMs)
2217{
2218    // mute/unmute strategies using an incompatible device combination
2219    // if muting, wait for the audio in pcm buffer to be drained before proceeding
2220    // if unmuting, unmute only after the specified delay
2221    if (outputDesc->isDuplicated()) {
2222        return 0;
2223    }
2224
2225    uint32_t muteWaitMs = 0;
2226    audio_devices_t device = outputDesc->device();
2227    bool shouldMute = (outputDesc->refCount() != 0) &&
2228                    (AudioSystem::popCount(device) >= 2);
2229    // temporary mute output if device selection changes to avoid volume bursts due to
2230    // different per device volumes
2231    bool tempMute = (outputDesc->refCount() != 0) && (device != prevDevice);
2232
2233    for (size_t i = 0; i < NUM_STRATEGIES; i++) {
2234        audio_devices_t curDevice = getDeviceForStrategy((routing_strategy)i, false /*fromCache*/);
2235        bool mute = shouldMute && (curDevice & device) && (curDevice != device);
2236        bool doMute = false;
2237
2238        if (mute && !outputDesc->mStrategyMutedByDevice[i]) {
2239            doMute = true;
2240            outputDesc->mStrategyMutedByDevice[i] = true;
2241        } else if (!mute && outputDesc->mStrategyMutedByDevice[i]){
2242            doMute = true;
2243            outputDesc->mStrategyMutedByDevice[i] = false;
2244        }
2245        if (doMute || tempMute) {
2246            for (size_t j = 0; j < mOutputs.size(); j++) {
2247                AudioOutputDescriptor *desc = mOutputs.valueAt(j);
2248                if ((desc->supportedDevices() & outputDesc->supportedDevices()) == 0) {
2249                    continue;
2250                }
2251                audio_io_handle_t curOutput = mOutputs.keyAt(j);
2252                ALOGVV("checkDeviceMuteStrategies() %s strategy %d (curDevice %04x) on output %d",
2253                      mute ? "muting" : "unmuting", i, curDevice, curOutput);
2254                setStrategyMute((routing_strategy)i, mute, curOutput, mute ? 0 : delayMs);
2255                if (desc->strategyRefCount((routing_strategy)i) != 0) {
2256                    if (tempMute) {
2257                        setStrategyMute((routing_strategy)i, true, curOutput);
2258                        setStrategyMute((routing_strategy)i, false, curOutput,
2259                                            desc->latency() * 2, device);
2260                    }
2261                    if (tempMute || mute) {
2262                        if (muteWaitMs < desc->latency()) {
2263                            muteWaitMs = desc->latency();
2264                        }
2265                    }
2266                }
2267            }
2268        }
2269    }
2270
2271    // FIXME: should not need to double latency if volume could be applied immediately by the
2272    // audioflinger mixer. We must account for the delay between now and the next time
2273    // the audioflinger thread for this output will process a buffer (which corresponds to
2274    // one buffer size, usually 1/2 or 1/4 of the latency).
2275    muteWaitMs *= 2;
2276    // wait for the PCM output buffers to empty before proceeding with the rest of the command
2277    if (muteWaitMs > delayMs) {
2278        muteWaitMs -= delayMs;
2279        usleep(muteWaitMs * 1000);
2280        return muteWaitMs;
2281    }
2282    return 0;
2283}
2284
2285uint32_t AudioPolicyManagerBase::setOutputDevice(audio_io_handle_t output,
2286                                             audio_devices_t device,
2287                                             bool force,
2288                                             int delayMs)
2289{
2290    ALOGV("setOutputDevice() output %d device %04x delayMs %d", output, device, delayMs);
2291    AudioOutputDescriptor *outputDesc = mOutputs.valueFor(output);
2292    AudioParameter param;
2293    uint32_t muteWaitMs = 0;
2294
2295    if (outputDesc->isDuplicated()) {
2296        muteWaitMs = setOutputDevice(outputDesc->mOutput1->mId, device, force, delayMs);
2297        muteWaitMs += setOutputDevice(outputDesc->mOutput2->mId, device, force, delayMs);
2298        return muteWaitMs;
2299    }
2300    // filter devices according to output selected
2301    device = (audio_devices_t)(device & outputDesc->mProfile->mSupportedDevices);
2302
2303    audio_devices_t prevDevice = outputDesc->mDevice;
2304
2305    ALOGV("setOutputDevice() prevDevice %04x", prevDevice);
2306
2307    if (device != 0) {
2308        outputDesc->mDevice = device;
2309    }
2310    muteWaitMs = checkDeviceMuteStrategies(outputDesc, prevDevice, delayMs);
2311
2312    // Do not change the routing if:
2313    //  - the requested device is 0
2314    //  - the requested device is the same as current device and force is not specified.
2315    // Doing this check here allows the caller to call setOutputDevice() without conditions
2316    if ((device == 0 || device == prevDevice) && !force) {
2317        ALOGV("setOutputDevice() setting same device %04x or null device for output %d", device, output);
2318        return muteWaitMs;
2319    }
2320
2321    ALOGV("setOutputDevice() changing device");
2322    // do the routing
2323    param.addInt(String8(AudioParameter::keyRouting), (int)device);
2324    mpClientInterface->setParameters(output, param.toString(), delayMs);
2325
2326    // update stream volumes according to new device
2327    applyStreamVolumes(output, device, delayMs);
2328
2329    return muteWaitMs;
2330}
2331
2332AudioPolicyManagerBase::IOProfile *AudioPolicyManagerBase::getInputProfile(audio_devices_t device,
2333                                                   uint32_t samplingRate,
2334                                                   uint32_t format,
2335                                                   uint32_t channelMask)
2336{
2337    // Choose an input profile based on the requested capture parameters: select the first available
2338    // profile supporting all requested parameters.
2339
2340    for (size_t i = 0; i < mHwModules.size(); i++)
2341    {
2342        if (mHwModules[i]->mHandle == 0) {
2343            continue;
2344        }
2345        for (size_t j = 0; j < mHwModules[i]->mInputProfiles.size(); j++)
2346        {
2347            IOProfile *profile = mHwModules[i]->mInputProfiles[j];
2348            if (profile->isCompatibleProfile(device, samplingRate, format,
2349                                             channelMask,(audio_output_flags_t)0)) {
2350                return profile;
2351            }
2352        }
2353    }
2354    return NULL;
2355}
2356
2357audio_devices_t AudioPolicyManagerBase::getDeviceForInputSource(int inputSource)
2358{
2359    uint32_t device = 0;
2360
2361    switch(inputSource) {
2362    case AUDIO_SOURCE_DEFAULT:
2363    case AUDIO_SOURCE_MIC:
2364    case AUDIO_SOURCE_VOICE_RECOGNITION:
2365    case AUDIO_SOURCE_VOICE_COMMUNICATION:
2366        if (mForceUse[AudioSystem::FOR_RECORD] == AudioSystem::FORCE_BT_SCO &&
2367            mAvailableInputDevices & AudioSystem::DEVICE_IN_BLUETOOTH_SCO_HEADSET) {
2368            device = AudioSystem::DEVICE_IN_BLUETOOTH_SCO_HEADSET;
2369        } else if (mAvailableInputDevices & AudioSystem::DEVICE_IN_WIRED_HEADSET) {
2370            device = AudioSystem::DEVICE_IN_WIRED_HEADSET;
2371        } else if (mAvailableInputDevices & AudioSystem::DEVICE_IN_BUILTIN_MIC) {
2372            device = AudioSystem::DEVICE_IN_BUILTIN_MIC;
2373        }
2374        break;
2375    case AUDIO_SOURCE_CAMCORDER:
2376        if (mAvailableInputDevices & AudioSystem::DEVICE_IN_BACK_MIC) {
2377            device = AudioSystem::DEVICE_IN_BACK_MIC;
2378        } else if (mAvailableInputDevices & AudioSystem::DEVICE_IN_BUILTIN_MIC) {
2379            device = AudioSystem::DEVICE_IN_BUILTIN_MIC;
2380        }
2381        break;
2382    case AUDIO_SOURCE_VOICE_UPLINK:
2383    case AUDIO_SOURCE_VOICE_DOWNLINK:
2384    case AUDIO_SOURCE_VOICE_CALL:
2385        if (mAvailableInputDevices & AudioSystem::DEVICE_IN_VOICE_CALL) {
2386            device = AudioSystem::DEVICE_IN_VOICE_CALL;
2387        }
2388        break;
2389    default:
2390        ALOGW("getDeviceForInputSource() invalid input source %d", inputSource);
2391        break;
2392    }
2393    ALOGV("getDeviceForInputSource()input source %d, device %08x", inputSource, device);
2394    return (audio_devices_t)device;
2395}
2396
2397audio_io_handle_t AudioPolicyManagerBase::getActiveInput()
2398{
2399    for (size_t i = 0; i < mInputs.size(); i++) {
2400        if (mInputs.valueAt(i)->mRefCount > 0) {
2401            return mInputs.keyAt(i);
2402        }
2403    }
2404    return 0;
2405}
2406
2407
2408audio_devices_t AudioPolicyManagerBase::getDeviceForVolume(audio_devices_t device)
2409{
2410    if (device == 0) {
2411        // this happens when forcing a route update and no track is active on an output.
2412        // In this case the returned category is not important.
2413        device =  AUDIO_DEVICE_OUT_SPEAKER;
2414    } else if (AudioSystem::popCount(device) > 1) {
2415        // Multiple device selection is either:
2416        //  - speaker + one other device: give priority to speaker in this case.
2417        //  - one A2DP device + another device: happens with duplicated output. In this case
2418        // retain the device on the A2DP output as the other must not correspond to an active
2419        // selection if not the speaker.
2420        if (device & AUDIO_DEVICE_OUT_SPEAKER) {
2421            device = AUDIO_DEVICE_OUT_SPEAKER;
2422        } else {
2423            device = (audio_devices_t)(device & AUDIO_DEVICE_OUT_ALL_A2DP);
2424        }
2425    }
2426
2427    ALOGW_IF(AudioSystem::popCount(device) != 1,
2428            "getDeviceForVolume() invalid device combination: %08x",
2429            device);
2430
2431    return device;
2432}
2433
2434AudioPolicyManagerBase::device_category AudioPolicyManagerBase::getDeviceCategory(audio_devices_t device)
2435{
2436    switch(getDeviceForVolume(device)) {
2437        case AUDIO_DEVICE_OUT_EARPIECE:
2438            return DEVICE_CATEGORY_EARPIECE;
2439        case AUDIO_DEVICE_OUT_WIRED_HEADSET:
2440        case AUDIO_DEVICE_OUT_WIRED_HEADPHONE:
2441        case AUDIO_DEVICE_OUT_BLUETOOTH_SCO:
2442        case AUDIO_DEVICE_OUT_BLUETOOTH_SCO_HEADSET:
2443        case AUDIO_DEVICE_OUT_BLUETOOTH_A2DP:
2444        case AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES:
2445            return DEVICE_CATEGORY_HEADSET;
2446        case AUDIO_DEVICE_OUT_SPEAKER:
2447        case AUDIO_DEVICE_OUT_BLUETOOTH_SCO_CARKIT:
2448        case AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_SPEAKER:
2449        case AUDIO_DEVICE_OUT_AUX_DIGITAL:
2450        case AUDIO_DEVICE_OUT_USB_ACCESSORY:
2451        case AUDIO_DEVICE_OUT_USB_DEVICE:
2452        default:
2453            return DEVICE_CATEGORY_SPEAKER;
2454    }
2455}
2456
2457float AudioPolicyManagerBase::volIndexToAmpl(audio_devices_t device, const StreamDescriptor& streamDesc,
2458        int indexInUi)
2459{
2460    device_category deviceCategory = getDeviceCategory(device);
2461    const VolumeCurvePoint *curve = streamDesc.mVolumeCurve[deviceCategory];
2462
2463    // the volume index in the UI is relative to the min and max volume indices for this stream type
2464    int nbSteps = 1 + curve[VOLMAX].mIndex -
2465            curve[VOLMIN].mIndex;
2466    int volIdx = (nbSteps * (indexInUi - streamDesc.mIndexMin)) /
2467            (streamDesc.mIndexMax - streamDesc.mIndexMin);
2468
2469    // find what part of the curve this index volume belongs to, or if it's out of bounds
2470    int segment = 0;
2471    if (volIdx < curve[VOLMIN].mIndex) {         // out of bounds
2472        return 0.0f;
2473    } else if (volIdx < curve[VOLKNEE1].mIndex) {
2474        segment = 0;
2475    } else if (volIdx < curve[VOLKNEE2].mIndex) {
2476        segment = 1;
2477    } else if (volIdx <= curve[VOLMAX].mIndex) {
2478        segment = 2;
2479    } else {                                                               // out of bounds
2480        return 1.0f;
2481    }
2482
2483    // linear interpolation in the attenuation table in dB
2484    float decibels = curve[segment].mDBAttenuation +
2485            ((float)(volIdx - curve[segment].mIndex)) *
2486                ( (curve[segment+1].mDBAttenuation -
2487                        curve[segment].mDBAttenuation) /
2488                    ((float)(curve[segment+1].mIndex -
2489                            curve[segment].mIndex)) );
2490
2491    float amplification = exp( decibels * 0.115129f); // exp( dB * ln(10) / 20 )
2492
2493    ALOGVV("VOLUME vol index=[%d %d %d], dB=[%.1f %.1f %.1f] ampl=%.5f",
2494            curve[segment].mIndex, volIdx,
2495            curve[segment+1].mIndex,
2496            curve[segment].mDBAttenuation,
2497            decibels,
2498            curve[segment+1].mDBAttenuation,
2499            amplification);
2500
2501    return amplification;
2502}
2503
2504const AudioPolicyManagerBase::VolumeCurvePoint
2505    AudioPolicyManagerBase::sDefaultVolumeCurve[AudioPolicyManagerBase::VOLCNT] = {
2506    {1, -49.5f}, {33, -33.5f}, {66, -17.0f}, {100, 0.0f}
2507};
2508
2509const AudioPolicyManagerBase::VolumeCurvePoint
2510    AudioPolicyManagerBase::sDefaultMediaVolumeCurve[AudioPolicyManagerBase::VOLCNT] = {
2511    {1, -58.0f}, {20, -40.0f}, {60, -17.0f}, {100, 0.0f}
2512};
2513
2514const AudioPolicyManagerBase::VolumeCurvePoint
2515    AudioPolicyManagerBase::sSpeakerMediaVolumeCurve[AudioPolicyManagerBase::VOLCNT] = {
2516    {1, -56.0f}, {20, -34.0f}, {60, -11.0f}, {100, 0.0f}
2517};
2518
2519const AudioPolicyManagerBase::VolumeCurvePoint
2520    AudioPolicyManagerBase::sSpeakerSonificationVolumeCurve[AudioPolicyManagerBase::VOLCNT] = {
2521    {1, -29.7f}, {33, -20.1f}, {66, -10.2f}, {100, 0.0f}
2522};
2523
2524// AUDIO_STREAM_SYSTEM, AUDIO_STREAM_ENFORCED_AUDIBLE and AUDIO_STREAM_DTMF volume tracks
2525// AUDIO_STREAM_RING on phones and AUDIO_STREAM_MUSIC on tablets (See AudioService.java).
2526// The range is constrained between -24dB and -6dB over speaker and -30dB and -18dB over headset.
2527const AudioPolicyManagerBase::VolumeCurvePoint
2528    AudioPolicyManagerBase::sDefaultSystemVolumeCurve[AudioPolicyManagerBase::VOLCNT] = {
2529    {1, -24.0f}, {33, -18.0f}, {66, -12.0f}, {100, -6.0f}
2530};
2531
2532const AudioPolicyManagerBase::VolumeCurvePoint
2533    AudioPolicyManagerBase::sHeadsetSystemVolumeCurve[AudioPolicyManagerBase::VOLCNT] = {
2534    {1, -30.0f}, {33, -26.0f}, {66, -22.0f}, {100, -18.0f}
2535};
2536
2537const AudioPolicyManagerBase::VolumeCurvePoint
2538            *AudioPolicyManagerBase::sVolumeProfiles[AUDIO_STREAM_CNT]
2539                                                   [AudioPolicyManagerBase::DEVICE_CATEGORY_CNT] = {
2540    { // AUDIO_STREAM_VOICE_CALL
2541        sDefaultVolumeCurve, // DEVICE_CATEGORY_HEADSET
2542        sDefaultVolumeCurve, // DEVICE_CATEGORY_SPEAKER
2543        sDefaultVolumeCurve  // DEVICE_CATEGORY_EARPIECE
2544    },
2545    { // AUDIO_STREAM_SYSTEM
2546        sHeadsetSystemVolumeCurve, // DEVICE_CATEGORY_HEADSET
2547        sDefaultSystemVolumeCurve, // DEVICE_CATEGORY_SPEAKER
2548        sDefaultSystemVolumeCurve  // DEVICE_CATEGORY_EARPIECE
2549    },
2550    { // AUDIO_STREAM_RING
2551        sDefaultVolumeCurve, // DEVICE_CATEGORY_HEADSET
2552        sSpeakerSonificationVolumeCurve, // DEVICE_CATEGORY_SPEAKER
2553        sDefaultVolumeCurve  // DEVICE_CATEGORY_EARPIECE
2554    },
2555    { // AUDIO_STREAM_MUSIC
2556        sDefaultMediaVolumeCurve, // DEVICE_CATEGORY_HEADSET
2557        sSpeakerMediaVolumeCurve, // DEVICE_CATEGORY_SPEAKER
2558        sDefaultMediaVolumeCurve  // DEVICE_CATEGORY_EARPIECE
2559    },
2560    { // AUDIO_STREAM_ALARM
2561        sDefaultVolumeCurve, // DEVICE_CATEGORY_HEADSET
2562        sSpeakerSonificationVolumeCurve, // DEVICE_CATEGORY_SPEAKER
2563        sDefaultVolumeCurve  // DEVICE_CATEGORY_EARPIECE
2564    },
2565    { // AUDIO_STREAM_NOTIFICATION
2566        sDefaultVolumeCurve, // DEVICE_CATEGORY_HEADSET
2567        sSpeakerSonificationVolumeCurve, // DEVICE_CATEGORY_SPEAKER
2568        sDefaultVolumeCurve  // DEVICE_CATEGORY_EARPIECE
2569    },
2570    { // AUDIO_STREAM_BLUETOOTH_SCO
2571        sDefaultVolumeCurve, // DEVICE_CATEGORY_HEADSET
2572        sDefaultVolumeCurve, // DEVICE_CATEGORY_SPEAKER
2573        sDefaultVolumeCurve  // DEVICE_CATEGORY_EARPIECE
2574    },
2575    { // AUDIO_STREAM_ENFORCED_AUDIBLE
2576        sHeadsetSystemVolumeCurve, // DEVICE_CATEGORY_HEADSET
2577        sDefaultSystemVolumeCurve, // DEVICE_CATEGORY_SPEAKER
2578        sDefaultSystemVolumeCurve  // DEVICE_CATEGORY_EARPIECE
2579    },
2580    {  // AUDIO_STREAM_DTMF
2581        sHeadsetSystemVolumeCurve, // DEVICE_CATEGORY_HEADSET
2582        sDefaultSystemVolumeCurve, // DEVICE_CATEGORY_SPEAKER
2583        sDefaultSystemVolumeCurve  // DEVICE_CATEGORY_EARPIECE
2584    },
2585    { // AUDIO_STREAM_TTS
2586        sDefaultMediaVolumeCurve, // DEVICE_CATEGORY_HEADSET
2587        sSpeakerMediaVolumeCurve, // DEVICE_CATEGORY_SPEAKER
2588        sDefaultMediaVolumeCurve  // DEVICE_CATEGORY_EARPIECE
2589    },
2590};
2591
2592void AudioPolicyManagerBase::initializeVolumeCurves()
2593{
2594    for (int i = 0; i < AUDIO_STREAM_CNT; i++) {
2595        for (int j = 0; j < DEVICE_CATEGORY_CNT; j++) {
2596            mStreams[i].mVolumeCurve[j] =
2597                    sVolumeProfiles[i][j];
2598        }
2599    }
2600}
2601
2602float AudioPolicyManagerBase::computeVolume(int stream,
2603                                            int index,
2604                                            audio_io_handle_t output,
2605                                            audio_devices_t device)
2606{
2607    float volume = 1.0;
2608    AudioOutputDescriptor *outputDesc = mOutputs.valueFor(output);
2609    StreamDescriptor &streamDesc = mStreams[stream];
2610
2611    if (device == 0) {
2612        device = outputDesc->device();
2613    }
2614
2615    // if volume is not 0 (not muted), force media volume to max on digital output
2616    if (stream == AudioSystem::MUSIC &&
2617        index != mStreams[stream].mIndexMin &&
2618        (device == AUDIO_DEVICE_OUT_AUX_DIGITAL ||
2619         device == AUDIO_DEVICE_OUT_DGTL_DOCK_HEADSET ||
2620         device == AUDIO_DEVICE_OUT_USB_ACCESSORY ||
2621         device == AUDIO_DEVICE_OUT_USB_DEVICE)) {
2622        return 1.0;
2623    }
2624
2625    volume = volIndexToAmpl(device, streamDesc, index);
2626
2627    // if a headset is connected, apply the following rules to ring tones and notifications
2628    // to avoid sound level bursts in user's ears:
2629    // - always attenuate ring tones and notifications volume by 6dB
2630    // - if music is playing, always limit the volume to current music volume,
2631    // with a minimum threshold at -36dB so that notification is always perceived.
2632    const routing_strategy stream_strategy = getStrategy((AudioSystem::stream_type)stream);
2633    if ((device & (AudioSystem::DEVICE_OUT_BLUETOOTH_A2DP |
2634            AudioSystem::DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES |
2635            AudioSystem::DEVICE_OUT_WIRED_HEADSET |
2636            AudioSystem::DEVICE_OUT_WIRED_HEADPHONE)) &&
2637        ((stream_strategy == STRATEGY_SONIFICATION)
2638                || (stream_strategy == STRATEGY_SONIFICATION_RESPECTFUL)
2639                || (stream == AudioSystem::SYSTEM)) &&
2640        streamDesc.mCanBeMuted) {
2641        volume *= SONIFICATION_HEADSET_VOLUME_FACTOR;
2642        // when the phone is ringing we must consider that music could have been paused just before
2643        // by the music application and behave as if music was active if the last music track was
2644        // just stopped
2645        if (isStreamActive(AudioSystem::MUSIC, SONIFICATION_HEADSET_MUSIC_DELAY) ||
2646                mLimitRingtoneVolume) {
2647            float musicVol = computeVolume(AudioSystem::MUSIC,
2648                               mStreams[AudioSystem::MUSIC].getVolumeIndex(device),
2649                               output,
2650                               device);
2651            float minVol = (musicVol > SONIFICATION_HEADSET_VOLUME_MIN) ?
2652                                musicVol : SONIFICATION_HEADSET_VOLUME_MIN;
2653            if (volume > minVol) {
2654                volume = minVol;
2655                ALOGV("computeVolume limiting volume to %f musicVol %f", minVol, musicVol);
2656            }
2657        }
2658    }
2659
2660    return volume;
2661}
2662
2663status_t AudioPolicyManagerBase::checkAndSetVolume(int stream,
2664                                                   int index,
2665                                                   audio_io_handle_t output,
2666                                                   audio_devices_t device,
2667                                                   int delayMs,
2668                                                   bool force)
2669{
2670
2671    // do not change actual stream volume if the stream is muted
2672    if (mOutputs.valueFor(output)->mMuteCount[stream] != 0) {
2673        ALOGVV("checkAndSetVolume() stream %d muted count %d",
2674              stream, mOutputs.valueFor(output)->mMuteCount[stream]);
2675        return NO_ERROR;
2676    }
2677
2678    // do not change in call volume if bluetooth is connected and vice versa
2679    if ((stream == AudioSystem::VOICE_CALL && mForceUse[AudioSystem::FOR_COMMUNICATION] == AudioSystem::FORCE_BT_SCO) ||
2680        (stream == AudioSystem::BLUETOOTH_SCO && mForceUse[AudioSystem::FOR_COMMUNICATION] != AudioSystem::FORCE_BT_SCO)) {
2681        ALOGV("checkAndSetVolume() cannot set stream %d volume with force use = %d for comm",
2682             stream, mForceUse[AudioSystem::FOR_COMMUNICATION]);
2683        return INVALID_OPERATION;
2684    }
2685
2686    float volume = computeVolume(stream, index, output, device);
2687    // We actually change the volume if:
2688    // - the float value returned by computeVolume() changed
2689    // - the force flag is set
2690    if (volume != mOutputs.valueFor(output)->mCurVolume[stream] ||
2691            force) {
2692        mOutputs.valueFor(output)->mCurVolume[stream] = volume;
2693        ALOGVV("checkAndSetVolume() for output %d stream %d, volume %f, delay %d", output, stream, volume, delayMs);
2694        if (stream == AudioSystem::VOICE_CALL ||
2695            stream == AudioSystem::DTMF ||
2696            stream == AudioSystem::BLUETOOTH_SCO) {
2697            // offset value to reflect actual hardware volume that never reaches 0
2698            // 1% corresponds roughly to first step in VOICE_CALL stream volume setting (see AudioService.java)
2699            volume = 0.01 + 0.99 * volume;
2700            // Force VOICE_CALL to track BLUETOOTH_SCO stream volume when bluetooth audio is
2701            // enabled
2702            if (stream == AudioSystem::BLUETOOTH_SCO) {
2703                mpClientInterface->setStreamVolume(AudioSystem::VOICE_CALL, volume, output, delayMs);
2704            }
2705        }
2706
2707        mpClientInterface->setStreamVolume((AudioSystem::stream_type)stream, volume, output, delayMs);
2708    }
2709
2710    if (stream == AudioSystem::VOICE_CALL ||
2711        stream == AudioSystem::BLUETOOTH_SCO) {
2712        float voiceVolume;
2713        // Force voice volume to max for bluetooth SCO as volume is managed by the headset
2714        if (stream == AudioSystem::VOICE_CALL) {
2715            voiceVolume = (float)index/(float)mStreams[stream].mIndexMax;
2716        } else {
2717            voiceVolume = 1.0;
2718        }
2719
2720        if (voiceVolume != mLastVoiceVolume && output == mPrimaryOutput) {
2721            mpClientInterface->setVoiceVolume(voiceVolume, delayMs);
2722            mLastVoiceVolume = voiceVolume;
2723        }
2724    }
2725
2726    return NO_ERROR;
2727}
2728
2729void AudioPolicyManagerBase::applyStreamVolumes(audio_io_handle_t output,
2730                                                audio_devices_t device,
2731                                                int delayMs,
2732                                                bool force)
2733{
2734    ALOGVV("applyStreamVolumes() for output %d and device %x", output, device);
2735
2736    for (int stream = 0; stream < AudioSystem::NUM_STREAM_TYPES; stream++) {
2737        checkAndSetVolume(stream,
2738                          mStreams[stream].getVolumeIndex(device),
2739                          output,
2740                          device,
2741                          delayMs,
2742                          force);
2743    }
2744}
2745
2746void AudioPolicyManagerBase::setStrategyMute(routing_strategy strategy,
2747                                             bool on,
2748                                             audio_io_handle_t output,
2749                                             int delayMs,
2750                                             audio_devices_t device)
2751{
2752    ALOGVV("setStrategyMute() strategy %d, mute %d, output %d", strategy, on, output);
2753    for (int stream = 0; stream < AudioSystem::NUM_STREAM_TYPES; stream++) {
2754        if (getStrategy((AudioSystem::stream_type)stream) == strategy) {
2755            setStreamMute(stream, on, output, delayMs, device);
2756        }
2757    }
2758}
2759
2760void AudioPolicyManagerBase::setStreamMute(int stream,
2761                                           bool on,
2762                                           audio_io_handle_t output,
2763                                           int delayMs,
2764                                           audio_devices_t device)
2765{
2766    StreamDescriptor &streamDesc = mStreams[stream];
2767    AudioOutputDescriptor *outputDesc = mOutputs.valueFor(output);
2768    if (device == 0) {
2769        device = outputDesc->device();
2770    }
2771
2772    ALOGVV("setStreamMute() stream %d, mute %d, output %d, mMuteCount %d device %04x",
2773          stream, on, output, outputDesc->mMuteCount[stream], device);
2774
2775    if (on) {
2776        if (outputDesc->mMuteCount[stream] == 0) {
2777            if (streamDesc.mCanBeMuted) {
2778                checkAndSetVolume(stream, 0, output, device, delayMs);
2779            }
2780        }
2781        // increment mMuteCount after calling checkAndSetVolume() so that volume change is not ignored
2782        outputDesc->mMuteCount[stream]++;
2783    } else {
2784        if (outputDesc->mMuteCount[stream] == 0) {
2785            ALOGV("setStreamMute() unmuting non muted stream!");
2786            return;
2787        }
2788        if (--outputDesc->mMuteCount[stream] == 0) {
2789            checkAndSetVolume(stream,
2790                              streamDesc.getVolumeIndex((audio_devices_t)device),
2791                              output,
2792                              device,
2793                              delayMs);
2794        }
2795    }
2796}
2797
2798void AudioPolicyManagerBase::handleIncallSonification(int stream, bool starting, bool stateChange)
2799{
2800    // if the stream pertains to sonification strategy and we are in call we must
2801    // mute the stream if it is low visibility. If it is high visibility, we must play a tone
2802    // in the device used for phone strategy and play the tone if the selected device does not
2803    // interfere with the device used for phone strategy
2804    // if stateChange is true, we are called from setPhoneState() and we must mute or unmute as
2805    // many times as there are active tracks on the output
2806    const routing_strategy stream_strategy = getStrategy((AudioSystem::stream_type)stream);
2807    if ((stream_strategy == STRATEGY_SONIFICATION) ||
2808            ((stream_strategy == STRATEGY_SONIFICATION_RESPECTFUL))) {
2809        AudioOutputDescriptor *outputDesc = mOutputs.valueFor(mPrimaryOutput);
2810        ALOGV("handleIncallSonification() stream %d starting %d device %x stateChange %d",
2811                stream, starting, outputDesc->mDevice, stateChange);
2812        if (outputDesc->mRefCount[stream]) {
2813            int muteCount = 1;
2814            if (stateChange) {
2815                muteCount = outputDesc->mRefCount[stream];
2816            }
2817            if (AudioSystem::isLowVisibility((AudioSystem::stream_type)stream)) {
2818                ALOGV("handleIncallSonification() low visibility, muteCount %d", muteCount);
2819                for (int i = 0; i < muteCount; i++) {
2820                    setStreamMute(stream, starting, mPrimaryOutput);
2821                }
2822            } else {
2823                ALOGV("handleIncallSonification() high visibility");
2824                if (outputDesc->device() &
2825                        getDeviceForStrategy(STRATEGY_PHONE, true /*fromCache*/)) {
2826                    ALOGV("handleIncallSonification() high visibility muted, muteCount %d", muteCount);
2827                    for (int i = 0; i < muteCount; i++) {
2828                        setStreamMute(stream, starting, mPrimaryOutput);
2829                    }
2830                }
2831                if (starting) {
2832                    mpClientInterface->startTone(ToneGenerator::TONE_SUP_CALL_WAITING, AudioSystem::VOICE_CALL);
2833                } else {
2834                    mpClientInterface->stopTone();
2835                }
2836            }
2837        }
2838    }
2839}
2840
2841bool AudioPolicyManagerBase::isInCall()
2842{
2843    return isStateInCall(mPhoneState);
2844}
2845
2846bool AudioPolicyManagerBase::isStateInCall(int state) {
2847    return ((state == AudioSystem::MODE_IN_CALL) ||
2848            (state == AudioSystem::MODE_IN_COMMUNICATION));
2849}
2850
2851bool AudioPolicyManagerBase::needsDirectOuput(audio_stream_type_t stream,
2852                                              uint32_t samplingRate,
2853                                              audio_format_t format,
2854                                              audio_channel_mask_t channelMask,
2855                                              audio_output_flags_t flags,
2856                                              audio_devices_t device)
2857{
2858   return ((flags & AudioSystem::OUTPUT_FLAG_DIRECT) ||
2859          (format != 0 && !AudioSystem::isLinearPCM(format)));
2860}
2861
2862uint32_t AudioPolicyManagerBase::getMaxEffectsCpuLoad()
2863{
2864    return MAX_EFFECTS_CPU_LOAD;
2865}
2866
2867uint32_t AudioPolicyManagerBase::getMaxEffectsMemory()
2868{
2869    return MAX_EFFECTS_MEMORY;
2870}
2871
2872// --- AudioOutputDescriptor class implementation
2873
2874AudioPolicyManagerBase::AudioOutputDescriptor::AudioOutputDescriptor(
2875        const IOProfile *profile)
2876    : mId(0), mSamplingRate(0), mFormat((audio_format_t)0),
2877      mChannelMask((audio_channel_mask_t)0), mLatency(0),
2878    mFlags((audio_output_flags_t)0), mDevice((audio_devices_t)0),
2879    mOutput1(0), mOutput2(0), mProfile(profile)
2880{
2881    // clear usage count for all stream types
2882    for (int i = 0; i < AudioSystem::NUM_STREAM_TYPES; i++) {
2883        mRefCount[i] = 0;
2884        mCurVolume[i] = -1.0;
2885        mMuteCount[i] = 0;
2886        mStopTime[i] = 0;
2887    }
2888    if (profile != NULL) {
2889        mSamplingRate = profile->mSamplingRates[0];
2890        mFormat = profile->mFormats[0];
2891        mChannelMask = profile->mChannelMasks[0];
2892        mFlags = profile->mFlags;
2893    }
2894}
2895
2896audio_devices_t AudioPolicyManagerBase::AudioOutputDescriptor::device()
2897{
2898    if (isDuplicated()) {
2899        return (audio_devices_t)(mOutput1->mDevice | mOutput2->mDevice);
2900    } else {
2901        return mDevice;
2902    }
2903}
2904
2905uint32_t AudioPolicyManagerBase::AudioOutputDescriptor::latency()
2906{
2907    if (isDuplicated()) {
2908        return (mOutput1->mLatency > mOutput2->mLatency) ? mOutput1->mLatency : mOutput2->mLatency;
2909    } else {
2910        return mLatency;
2911    }
2912}
2913
2914bool AudioPolicyManagerBase::AudioOutputDescriptor::sharesHwModuleWith(
2915        const AudioOutputDescriptor *outputDesc)
2916{
2917    if (isDuplicated()) {
2918        return mOutput1->sharesHwModuleWith(outputDesc) || mOutput2->sharesHwModuleWith(outputDesc);
2919    } else if (outputDesc->isDuplicated()){
2920        return sharesHwModuleWith(outputDesc->mOutput1) || sharesHwModuleWith(outputDesc->mOutput2);
2921    } else {
2922        return (mProfile->mModule == outputDesc->mProfile->mModule);
2923    }
2924}
2925
2926void AudioPolicyManagerBase::AudioOutputDescriptor::changeRefCount(AudioSystem::stream_type stream, int delta)
2927{
2928    // forward usage count change to attached outputs
2929    if (isDuplicated()) {
2930        mOutput1->changeRefCount(stream, delta);
2931        mOutput2->changeRefCount(stream, delta);
2932    }
2933    if ((delta + (int)mRefCount[stream]) < 0) {
2934        ALOGW("changeRefCount() invalid delta %d for stream %d, refCount %d", delta, stream, mRefCount[stream]);
2935        mRefCount[stream] = 0;
2936        return;
2937    }
2938    mRefCount[stream] += delta;
2939    ALOGV("changeRefCount() stream %d, count %d", stream, mRefCount[stream]);
2940}
2941
2942uint32_t AudioPolicyManagerBase::AudioOutputDescriptor::refCount()
2943{
2944    uint32_t refcount = 0;
2945    for (int i = 0; i < (int)AudioSystem::NUM_STREAM_TYPES; i++) {
2946        refcount += mRefCount[i];
2947    }
2948    return refcount;
2949}
2950
2951uint32_t AudioPolicyManagerBase::AudioOutputDescriptor::strategyRefCount(routing_strategy strategy)
2952{
2953    uint32_t refCount = 0;
2954    for (int i = 0; i < (int)AudioSystem::NUM_STREAM_TYPES; i++) {
2955        if (getStrategy((AudioSystem::stream_type)i) == strategy) {
2956            refCount += mRefCount[i];
2957        }
2958    }
2959    return refCount;
2960}
2961
2962audio_devices_t AudioPolicyManagerBase::AudioOutputDescriptor::supportedDevices()
2963{
2964    if (isDuplicated()) {
2965        return (audio_devices_t)(mOutput1->supportedDevices() | mOutput2->supportedDevices());
2966    } else {
2967        return mProfile->mSupportedDevices ;
2968    }
2969}
2970
2971status_t AudioPolicyManagerBase::AudioOutputDescriptor::dump(int fd)
2972{
2973    const size_t SIZE = 256;
2974    char buffer[SIZE];
2975    String8 result;
2976
2977    snprintf(buffer, SIZE, " Sampling rate: %d\n", mSamplingRate);
2978    result.append(buffer);
2979    snprintf(buffer, SIZE, " Format: %d\n", mFormat);
2980    result.append(buffer);
2981    snprintf(buffer, SIZE, " Channels: %08x\n", mChannelMask);
2982    result.append(buffer);
2983    snprintf(buffer, SIZE, " Latency: %d\n", mLatency);
2984    result.append(buffer);
2985    snprintf(buffer, SIZE, " Flags %08x\n", mFlags);
2986    result.append(buffer);
2987    snprintf(buffer, SIZE, " Devices %08x\n", device());
2988    result.append(buffer);
2989    snprintf(buffer, SIZE, " Stream volume refCount muteCount\n");
2990    result.append(buffer);
2991    for (int i = 0; i < AudioSystem::NUM_STREAM_TYPES; i++) {
2992        snprintf(buffer, SIZE, " %02d     %.03f     %02d       %02d\n", i, mCurVolume[i], mRefCount[i], mMuteCount[i]);
2993        result.append(buffer);
2994    }
2995    write(fd, result.string(), result.size());
2996
2997    return NO_ERROR;
2998}
2999
3000// --- AudioInputDescriptor class implementation
3001
3002AudioPolicyManagerBase::AudioInputDescriptor::AudioInputDescriptor(const IOProfile *profile)
3003    : mSamplingRate(0), mFormat((audio_format_t)0), mChannelMask((audio_channel_mask_t)0),
3004      mDevice((audio_devices_t)0), mRefCount(0),
3005      mInputSource(0), mProfile(profile)
3006{
3007}
3008
3009status_t AudioPolicyManagerBase::AudioInputDescriptor::dump(int fd)
3010{
3011    const size_t SIZE = 256;
3012    char buffer[SIZE];
3013    String8 result;
3014
3015    snprintf(buffer, SIZE, " Sampling rate: %d\n", mSamplingRate);
3016    result.append(buffer);
3017    snprintf(buffer, SIZE, " Format: %d\n", mFormat);
3018    result.append(buffer);
3019    snprintf(buffer, SIZE, " Channels: %08x\n", mChannelMask);
3020    result.append(buffer);
3021    snprintf(buffer, SIZE, " Devices %08x\n", mDevice);
3022    result.append(buffer);
3023    snprintf(buffer, SIZE, " Ref Count %d\n", mRefCount);
3024    result.append(buffer);
3025    write(fd, result.string(), result.size());
3026
3027    return NO_ERROR;
3028}
3029
3030// --- StreamDescriptor class implementation
3031
3032AudioPolicyManagerBase::StreamDescriptor::StreamDescriptor()
3033    :   mIndexMin(0), mIndexMax(1), mCanBeMuted(true)
3034{
3035    mIndexCur.add(AUDIO_DEVICE_OUT_DEFAULT, 0);
3036}
3037
3038int AudioPolicyManagerBase::StreamDescriptor::getVolumeIndex(audio_devices_t device)
3039{
3040    device = AudioPolicyManagerBase::getDeviceForVolume(device);
3041    // there is always a valid entry for AUDIO_DEVICE_OUT_DEFAULT
3042    if (mIndexCur.indexOfKey(device) < 0) {
3043        device = AUDIO_DEVICE_OUT_DEFAULT;
3044    }
3045    return mIndexCur.valueFor(device);
3046}
3047
3048void AudioPolicyManagerBase::StreamDescriptor::dump(int fd)
3049{
3050    const size_t SIZE = 256;
3051    char buffer[SIZE];
3052    String8 result;
3053
3054    snprintf(buffer, SIZE, "%s         %02d         %02d         ",
3055             mCanBeMuted ? "true " : "false", mIndexMin, mIndexMax);
3056    result.append(buffer);
3057    for (size_t i = 0; i < mIndexCur.size(); i++) {
3058        snprintf(buffer, SIZE, "%04x : %02d, ",
3059                 mIndexCur.keyAt(i),
3060                 mIndexCur.valueAt(i));
3061        result.append(buffer);
3062    }
3063    result.append("\n");
3064
3065    write(fd, result.string(), result.size());
3066}
3067
3068// --- EffectDescriptor class implementation
3069
3070status_t AudioPolicyManagerBase::EffectDescriptor::dump(int fd)
3071{
3072    const size_t SIZE = 256;
3073    char buffer[SIZE];
3074    String8 result;
3075
3076    snprintf(buffer, SIZE, " I/O: %d\n", mIo);
3077    result.append(buffer);
3078    snprintf(buffer, SIZE, " Strategy: %d\n", mStrategy);
3079    result.append(buffer);
3080    snprintf(buffer, SIZE, " Session: %d\n", mSession);
3081    result.append(buffer);
3082    snprintf(buffer, SIZE, " Name: %s\n",  mDesc.name);
3083    result.append(buffer);
3084    snprintf(buffer, SIZE, " %s\n",  mEnabled ? "Enabled" : "Disabled");
3085    result.append(buffer);
3086    write(fd, result.string(), result.size());
3087
3088    return NO_ERROR;
3089}
3090
3091// --- IOProfile class implementation
3092
3093AudioPolicyManagerBase::HwModule::HwModule(const char *name)
3094    : mName(strndup(name, AUDIO_HARDWARE_MODULE_ID_MAX_LEN)), mHandle(0)
3095{
3096}
3097
3098AudioPolicyManagerBase::HwModule::~HwModule()
3099{
3100    for (size_t i = 0; i < mOutputProfiles.size(); i++) {
3101         delete mOutputProfiles[i];
3102    }
3103    for (size_t i = 0; i < mInputProfiles.size(); i++) {
3104         delete mInputProfiles[i];
3105    }
3106    free((void *)mName);
3107}
3108
3109void AudioPolicyManagerBase::HwModule::dump(int fd)
3110{
3111    const size_t SIZE = 256;
3112    char buffer[SIZE];
3113    String8 result;
3114
3115    snprintf(buffer, SIZE, "  - name: %s\n", mName);
3116    result.append(buffer);
3117    snprintf(buffer, SIZE, "  - handle: %d\n", mHandle);
3118    result.append(buffer);
3119    write(fd, result.string(), result.size());
3120    if (mOutputProfiles.size()) {
3121        write(fd, "  - outputs:\n", sizeof("  - outputs:\n"));
3122        for (size_t i = 0; i < mOutputProfiles.size(); i++) {
3123            snprintf(buffer, SIZE, "    output %d:\n", i);
3124            write(fd, buffer, strlen(buffer));
3125            mOutputProfiles[i]->dump(fd);
3126        }
3127    }
3128    if (mInputProfiles.size()) {
3129        write(fd, "  - inputs:\n", sizeof("  - inputs:\n"));
3130        for (size_t i = 0; i < mInputProfiles.size(); i++) {
3131            snprintf(buffer, SIZE, "    input %d:\n", i);
3132            write(fd, buffer, strlen(buffer));
3133            mInputProfiles[i]->dump(fd);
3134        }
3135    }
3136}
3137
3138AudioPolicyManagerBase::IOProfile::IOProfile(HwModule *module)
3139    : mFlags((audio_output_flags_t)0), mModule(module)
3140{
3141}
3142
3143AudioPolicyManagerBase::IOProfile::~IOProfile()
3144{
3145}
3146
3147// checks if the IO profile is compatible with specified parameters. By convention a value of 0
3148// means a parameter is don't care
3149bool AudioPolicyManagerBase::IOProfile::isCompatibleProfile(audio_devices_t device,
3150                                                            uint32_t samplingRate,
3151                                                            uint32_t format,
3152                                                            uint32_t channelMask,
3153                                                            audio_output_flags_t flags) const
3154{
3155    if ((mSupportedDevices & device) != device) {
3156        return false;
3157    }
3158    if ((mFlags & flags) != flags) {
3159        return false;
3160    }
3161    if (samplingRate != 0) {
3162        size_t i;
3163        for (i = 0; i < mSamplingRates.size(); i++)
3164        {
3165            if (mSamplingRates[i] == samplingRate) {
3166                break;
3167            }
3168        }
3169        if (i == mSamplingRates.size()) {
3170            return false;
3171        }
3172    }
3173    if (format != 0) {
3174        size_t i;
3175        for (i = 0; i < mFormats.size(); i++)
3176        {
3177            if (mFormats[i] == format) {
3178                break;
3179            }
3180        }
3181        if (i == mFormats.size()) {
3182            return false;
3183        }
3184    }
3185    if (channelMask != 0) {
3186        size_t i;
3187        for (i = 0; i < mChannelMasks.size(); i++)
3188        {
3189            if (mChannelMasks[i] == channelMask) {
3190                break;
3191            }
3192        }
3193        if (i == mChannelMasks.size()) {
3194            return false;
3195        }
3196    }
3197    return true;
3198}
3199
3200void AudioPolicyManagerBase::IOProfile::dump(int fd)
3201{
3202    const size_t SIZE = 256;
3203    char buffer[SIZE];
3204    String8 result;
3205
3206    snprintf(buffer, SIZE, "    - sampling rates: ");
3207    result.append(buffer);
3208    for (size_t i = 0; i < mSamplingRates.size(); i++) {
3209        snprintf(buffer, SIZE, "%d", mSamplingRates[i]);
3210        result.append(buffer);
3211        result.append(i == (mSamplingRates.size() - 1) ? "\n" : ", ");
3212    }
3213
3214    snprintf(buffer, SIZE, "    - channel masks: ");
3215    result.append(buffer);
3216    for (size_t i = 0; i < mChannelMasks.size(); i++) {
3217        snprintf(buffer, SIZE, "%04x", mChannelMasks[i]);
3218        result.append(buffer);
3219        result.append(i == (mChannelMasks.size() - 1) ? "\n" : ", ");
3220    }
3221
3222    snprintf(buffer, SIZE, "    - formats: ");
3223    result.append(buffer);
3224    for (size_t i = 0; i < mFormats.size(); i++) {
3225        snprintf(buffer, SIZE, "%d", mFormats[i]);
3226        result.append(buffer);
3227        result.append(i == (mFormats.size() - 1) ? "\n" : ", ");
3228    }
3229
3230    snprintf(buffer, SIZE, "    - devices: %04x\n", mSupportedDevices);
3231    result.append(buffer);
3232    snprintf(buffer, SIZE, "    - flags: %04x\n", mFlags);
3233    result.append(buffer);
3234
3235    write(fd, result.string(), result.size());
3236}
3237
3238// --- audio_policy.conf file parsing
3239
3240struct StringToEnum {
3241    const char *name;
3242    uint32_t value;
3243};
3244
3245#define STRING_TO_ENUM(string) { #string, string }
3246#define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0]))
3247
3248const struct StringToEnum sDeviceNameToEnumTable[] = {
3249    STRING_TO_ENUM(AUDIO_DEVICE_OUT_EARPIECE),
3250    STRING_TO_ENUM(AUDIO_DEVICE_OUT_SPEAKER),
3251    STRING_TO_ENUM(AUDIO_DEVICE_OUT_WIRED_HEADSET),
3252    STRING_TO_ENUM(AUDIO_DEVICE_OUT_WIRED_HEADPHONE),
3253    STRING_TO_ENUM(AUDIO_DEVICE_OUT_ALL_SCO),
3254    STRING_TO_ENUM(AUDIO_DEVICE_OUT_ALL_A2DP),
3255    STRING_TO_ENUM(AUDIO_DEVICE_OUT_AUX_DIGITAL),
3256    STRING_TO_ENUM(AUDIO_DEVICE_OUT_DGTL_DOCK_HEADSET),
3257    STRING_TO_ENUM(AUDIO_DEVICE_OUT_ANLG_DOCK_HEADSET),
3258    STRING_TO_ENUM(AUDIO_DEVICE_OUT_USB_DEVICE),
3259    STRING_TO_ENUM(AUDIO_DEVICE_OUT_USB_ACCESSORY),
3260    STRING_TO_ENUM(AUDIO_DEVICE_OUT_ALL_USB),
3261    STRING_TO_ENUM(AUDIO_DEVICE_IN_BUILTIN_MIC),
3262    STRING_TO_ENUM(AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET),
3263    STRING_TO_ENUM(AUDIO_DEVICE_IN_WIRED_HEADSET),
3264    STRING_TO_ENUM(AUDIO_DEVICE_IN_AUX_DIGITAL),
3265    STRING_TO_ENUM(AUDIO_DEVICE_IN_VOICE_CALL),
3266    STRING_TO_ENUM(AUDIO_DEVICE_IN_BACK_MIC),
3267};
3268
3269const struct StringToEnum sFlagNameToEnumTable[] = {
3270    STRING_TO_ENUM(AUDIO_OUTPUT_FLAG_DIRECT),
3271    STRING_TO_ENUM(AUDIO_OUTPUT_FLAG_PRIMARY),
3272    STRING_TO_ENUM(AUDIO_OUTPUT_FLAG_FAST),
3273    STRING_TO_ENUM(AUDIO_OUTPUT_FLAG_DEEP_BUFFER),
3274};
3275
3276const struct StringToEnum sFormatNameToEnumTable[] = {
3277    STRING_TO_ENUM(AUDIO_FORMAT_PCM_16_BIT),
3278    STRING_TO_ENUM(AUDIO_FORMAT_PCM_8_BIT),
3279    STRING_TO_ENUM(AUDIO_FORMAT_MP3),
3280    STRING_TO_ENUM(AUDIO_FORMAT_AAC),
3281    STRING_TO_ENUM(AUDIO_FORMAT_VORBIS),
3282};
3283
3284const struct StringToEnum sOutChannelsNameToEnumTable[] = {
3285    STRING_TO_ENUM(AUDIO_CHANNEL_OUT_MONO),
3286    STRING_TO_ENUM(AUDIO_CHANNEL_OUT_STEREO),
3287    STRING_TO_ENUM(AUDIO_CHANNEL_OUT_5POINT1),
3288    STRING_TO_ENUM(AUDIO_CHANNEL_OUT_7POINT1),
3289};
3290
3291const struct StringToEnum sInChannelsNameToEnumTable[] = {
3292    STRING_TO_ENUM(AUDIO_CHANNEL_IN_MONO),
3293    STRING_TO_ENUM(AUDIO_CHANNEL_IN_STEREO),
3294};
3295
3296
3297uint32_t AudioPolicyManagerBase::stringToEnum(const struct StringToEnum *table,
3298                                              size_t size,
3299                                              const char *name)
3300{
3301    for (size_t i = 0; i < size; i++) {
3302        if (strcmp(table[i].name, name) == 0) {
3303            ALOGV("stringToEnum() found %s", table[i].name);
3304            return table[i].value;
3305        }
3306    }
3307    return 0;
3308}
3309
3310audio_output_flags_t AudioPolicyManagerBase::parseFlagNames(char *name)
3311{
3312    uint32_t flag = 0;
3313
3314    // it is OK to cast name to non const here as we are not going to use it after
3315    // strtok() modifies it
3316    char *flagName = strtok(name, "|");
3317    while (flagName != NULL) {
3318        if (strlen(flagName) != 0) {
3319            flag |= stringToEnum(sFlagNameToEnumTable,
3320                               ARRAY_SIZE(sFlagNameToEnumTable),
3321                               flagName);
3322        }
3323        flagName = strtok(NULL, "|");
3324    }
3325    return (audio_output_flags_t)flag;
3326}
3327
3328audio_devices_t AudioPolicyManagerBase::parseDeviceNames(char *name)
3329{
3330    uint32_t device = 0;
3331
3332    char *devName = strtok(name, "|");
3333    while (devName != NULL) {
3334        if (strlen(devName) != 0) {
3335            device |= stringToEnum(sDeviceNameToEnumTable,
3336                                 ARRAY_SIZE(sDeviceNameToEnumTable),
3337                                 devName);
3338        }
3339        devName = strtok(NULL, "|");
3340    }
3341    return (audio_devices_t)device;
3342}
3343
3344void AudioPolicyManagerBase::loadSamplingRates(char *name, IOProfile *profile)
3345{
3346    char *str = strtok(name, "|");
3347
3348    // by convention, "0' in the first entry in mSamplingRates indicates the supported sampling
3349    // rates should be read from the output stream after it is opened for the first time
3350    if (str != NULL && strcmp(str, DYNAMIC_VALUE_TAG) == 0) {
3351        profile->mSamplingRates.add(0);
3352        return;
3353    }
3354
3355    while (str != NULL) {
3356        uint32_t rate = atoi(str);
3357        if (rate != 0) {
3358            ALOGV("loadSamplingRates() adding rate %d", rate);
3359            profile->mSamplingRates.add(rate);
3360        }
3361        str = strtok(NULL, "|");
3362    }
3363    return;
3364}
3365
3366void AudioPolicyManagerBase::loadFormats(char *name, IOProfile *profile)
3367{
3368    char *str = strtok(name, "|");
3369
3370    // by convention, "0' in the first entry in mFormats indicates the supported formats
3371    // should be read from the output stream after it is opened for the first time
3372    if (str != NULL && strcmp(str, DYNAMIC_VALUE_TAG) == 0) {
3373        profile->mFormats.add((audio_format_t)0);
3374        return;
3375    }
3376
3377    while (str != NULL) {
3378        audio_format_t format = (audio_format_t)stringToEnum(sFormatNameToEnumTable,
3379                                                             ARRAY_SIZE(sFormatNameToEnumTable),
3380                                                             str);
3381        if (format != 0) {
3382            profile->mFormats.add(format);
3383        }
3384        str = strtok(NULL, "|");
3385    }
3386    return;
3387}
3388
3389void AudioPolicyManagerBase::loadInChannels(char *name, IOProfile *profile)
3390{
3391    const char *str = strtok(name, "|");
3392
3393    ALOGV("loadInChannels() %s", name);
3394
3395    if (str != NULL && strcmp(str, DYNAMIC_VALUE_TAG) == 0) {
3396        profile->mChannelMasks.add((audio_channel_mask_t)0);
3397        return;
3398    }
3399
3400    while (str != NULL) {
3401        audio_channel_mask_t channelMask =
3402                (audio_channel_mask_t)stringToEnum(sInChannelsNameToEnumTable,
3403                                                   ARRAY_SIZE(sInChannelsNameToEnumTable),
3404                                                   str);
3405        if (channelMask != 0) {
3406            ALOGV("loadInChannels() adding channelMask %04x", channelMask);
3407            profile->mChannelMasks.add(channelMask);
3408        }
3409        str = strtok(NULL, "|");
3410    }
3411    return;
3412}
3413
3414void AudioPolicyManagerBase::loadOutChannels(char *name, IOProfile *profile)
3415{
3416    const char *str = strtok(name, "|");
3417
3418    ALOGV("loadOutChannels() %s", name);
3419
3420    // by convention, "0' in the first entry in mChannelMasks indicates the supported channel
3421    // masks should be read from the output stream after it is opened for the first time
3422    if (str != NULL && strcmp(str, DYNAMIC_VALUE_TAG) == 0) {
3423        profile->mChannelMasks.add((audio_channel_mask_t)0);
3424        return;
3425    }
3426
3427    while (str != NULL) {
3428        audio_channel_mask_t channelMask =
3429                (audio_channel_mask_t)stringToEnum(sOutChannelsNameToEnumTable,
3430                                                   ARRAY_SIZE(sOutChannelsNameToEnumTable),
3431                                                   str);
3432        if (channelMask != 0) {
3433            profile->mChannelMasks.add(channelMask);
3434        }
3435        str = strtok(NULL, "|");
3436    }
3437    return;
3438}
3439
3440status_t AudioPolicyManagerBase::loadInput(cnode *root, HwModule *module)
3441{
3442    cnode *node = root->first_child;
3443
3444    IOProfile *profile = new IOProfile(module);
3445
3446    while (node) {
3447        if (strcmp(node->name, SAMPLING_RATES_TAG) == 0) {
3448            loadSamplingRates((char *)node->value, profile);
3449        } else if (strcmp(node->name, FORMATS_TAG) == 0) {
3450            loadFormats((char *)node->value, profile);
3451        } else if (strcmp(node->name, CHANNELS_TAG) == 0) {
3452            loadInChannels((char *)node->value, profile);
3453        } else if (strcmp(node->name, DEVICES_TAG) == 0) {
3454            profile->mSupportedDevices = parseDeviceNames((char *)node->value);
3455        }
3456        node = node->next;
3457    }
3458    ALOGW_IF(profile->mSupportedDevices == (audio_devices_t)0,
3459            "loadInput() invalid supported devices");
3460    ALOGW_IF(profile->mChannelMasks.size() == 0,
3461            "loadInput() invalid supported channel masks");
3462    ALOGW_IF(profile->mSamplingRates.size() == 0,
3463            "loadInput() invalid supported sampling rates");
3464    ALOGW_IF(profile->mFormats.size() == 0,
3465            "loadInput() invalid supported formats");
3466    if ((profile->mSupportedDevices != (audio_devices_t)0) &&
3467            (profile->mChannelMasks.size() != 0) &&
3468            (profile->mSamplingRates.size() != 0) &&
3469            (profile->mFormats.size() != 0)) {
3470
3471        ALOGV("loadInput() adding input mSupportedDevices %04x", profile->mSupportedDevices);
3472
3473        module->mInputProfiles.add(profile);
3474        return NO_ERROR;
3475    } else {
3476        delete profile;
3477        return BAD_VALUE;
3478    }
3479}
3480
3481status_t AudioPolicyManagerBase::loadOutput(cnode *root, HwModule *module)
3482{
3483    cnode *node = root->first_child;
3484
3485    IOProfile *profile = new IOProfile(module);
3486
3487    while (node) {
3488        if (strcmp(node->name, SAMPLING_RATES_TAG) == 0) {
3489            loadSamplingRates((char *)node->value, profile);
3490        } else if (strcmp(node->name, FORMATS_TAG) == 0) {
3491            loadFormats((char *)node->value, profile);
3492        } else if (strcmp(node->name, CHANNELS_TAG) == 0) {
3493            loadOutChannels((char *)node->value, profile);
3494        } else if (strcmp(node->name, DEVICES_TAG) == 0) {
3495            profile->mSupportedDevices = parseDeviceNames((char *)node->value);
3496        } else if (strcmp(node->name, FLAGS_TAG) == 0) {
3497            profile->mFlags = parseFlagNames((char *)node->value);
3498        }
3499        node = node->next;
3500    }
3501    ALOGW_IF(profile->mSupportedDevices == (audio_devices_t)0,
3502            "loadOutput() invalid supported devices");
3503    ALOGW_IF(profile->mChannelMasks.size() == 0,
3504            "loadOutput() invalid supported channel masks");
3505    ALOGW_IF(profile->mSamplingRates.size() == 0,
3506            "loadOutput() invalid supported sampling rates");
3507    ALOGW_IF(profile->mFormats.size() == 0,
3508            "loadOutput() invalid supported formats");
3509    if ((profile->mSupportedDevices != (audio_devices_t)0) &&
3510            (profile->mChannelMasks.size() != 0) &&
3511            (profile->mSamplingRates.size() != 0) &&
3512            (profile->mFormats.size() != 0)) {
3513
3514        ALOGV("loadOutput() adding output mSupportedDevices %04x, mFlags %04x",
3515              profile->mSupportedDevices, profile->mFlags);
3516
3517        module->mOutputProfiles.add(profile);
3518        return NO_ERROR;
3519    } else {
3520        delete profile;
3521        return BAD_VALUE;
3522    }
3523}
3524
3525void AudioPolicyManagerBase::loadHwModule(cnode *root)
3526{
3527    cnode *node = config_find(root, OUTPUTS_TAG);
3528    status_t status = NAME_NOT_FOUND;
3529
3530    HwModule *module = new HwModule(root->name);
3531
3532    if (node != NULL) {
3533        if (strcmp(root->name, AUDIO_HARDWARE_MODULE_ID_A2DP) == 0) {
3534            mHasA2dp = true;
3535        } else if (strcmp(root->name, AUDIO_HARDWARE_MODULE_ID_USB) == 0) {
3536            mHasUsb = true;
3537        }
3538
3539        node = node->first_child;
3540        while (node) {
3541            ALOGV("loadHwModule() loading output %s", node->name);
3542            status_t tmpStatus = loadOutput(node, module);
3543            if (status == NAME_NOT_FOUND || status == NO_ERROR) {
3544                status = tmpStatus;
3545            }
3546            node = node->next;
3547        }
3548    }
3549    node = config_find(root, INPUTS_TAG);
3550    if (node != NULL) {
3551        node = node->first_child;
3552        while (node) {
3553            ALOGV("loadHwModule() loading input %s", node->name);
3554            status_t tmpStatus = loadInput(node, module);
3555            if (status == NAME_NOT_FOUND || status == NO_ERROR) {
3556                status = tmpStatus;
3557            }
3558            node = node->next;
3559        }
3560    }
3561    if (status == NO_ERROR) {
3562        mHwModules.add(module);
3563    } else {
3564        delete module;
3565    }
3566}
3567
3568void AudioPolicyManagerBase::loadHwModules(cnode *root)
3569{
3570    cnode *node = config_find(root, AUDIO_HW_MODULE_TAG);
3571    if (node == NULL) {
3572        return;
3573    }
3574
3575    node = node->first_child;
3576    while (node) {
3577        ALOGV("loadHwModules() loading module %s", node->name);
3578        loadHwModule(node);
3579        node = node->next;
3580    }
3581}
3582
3583void AudioPolicyManagerBase::loadGlobalConfig(cnode *root)
3584{
3585    cnode *node = config_find(root, GLOBAL_CONFIG_TAG);
3586    if (node == NULL) {
3587        return;
3588    }
3589    node = node->first_child;
3590    while (node) {
3591        if (strcmp(ATTACHED_OUTPUT_DEVICES_TAG, node->name) == 0) {
3592            mAttachedOutputDevices = parseDeviceNames((char *)node->value);
3593            ALOGW_IF(mAttachedOutputDevices == 0, "loadGlobalConfig() no attached output devices");
3594            ALOGV("loadGlobalConfig() mAttachedOutputDevices %04x", mAttachedOutputDevices);
3595        } else if (strcmp(DEFAULT_OUTPUT_DEVICE_TAG, node->name) == 0) {
3596            mDefaultOutputDevice = (audio_devices_t)stringToEnum(sDeviceNameToEnumTable,
3597                                              ARRAY_SIZE(sDeviceNameToEnumTable),
3598                                              (char *)node->value);
3599            ALOGW_IF(mDefaultOutputDevice == 0, "loadGlobalConfig() default device not specified");
3600            ALOGV("loadGlobalConfig() mDefaultOutputDevice %04x", mDefaultOutputDevice);
3601        } else if (strcmp(ATTACHED_INPUT_DEVICES_TAG, node->name) == 0) {
3602            mAvailableInputDevices = parseDeviceNames((char *)node->value);
3603            ALOGV("loadGlobalConfig() mAvailableInputDevices %04x", mAvailableInputDevices);
3604        }
3605        node = node->next;
3606    }
3607}
3608
3609status_t AudioPolicyManagerBase::loadAudioPolicyConfig(const char *path)
3610{
3611    cnode *root;
3612    char *data;
3613
3614    data = (char *)load_file(path, NULL);
3615    if (data == NULL) {
3616        return -ENODEV;
3617    }
3618    root = config_node("", "");
3619    config_load(root, data);
3620
3621    loadGlobalConfig(root);
3622    loadHwModules(root);
3623
3624    config_free(root);
3625    free(root);
3626    free(data);
3627
3628    ALOGI("loadAudioPolicyConfig() loaded %s\n", path);
3629
3630    return NO_ERROR;
3631}
3632
3633void AudioPolicyManagerBase::defaultAudioPolicyConfig(void)
3634{
3635    HwModule *module;
3636    IOProfile *profile;
3637
3638    mDefaultOutputDevice = AUDIO_DEVICE_OUT_SPEAKER;
3639    mAttachedOutputDevices = AUDIO_DEVICE_OUT_SPEAKER;
3640    mAvailableInputDevices = AUDIO_DEVICE_IN_BUILTIN_MIC;
3641
3642    module = new HwModule("primary");
3643
3644    profile = new IOProfile(module);
3645    profile->mSamplingRates.add(44100);
3646    profile->mFormats.add(AUDIO_FORMAT_PCM_16_BIT);
3647    profile->mChannelMasks.add(AUDIO_CHANNEL_OUT_STEREO);
3648    profile->mSupportedDevices = AUDIO_DEVICE_OUT_SPEAKER;
3649    profile->mFlags = AUDIO_OUTPUT_FLAG_PRIMARY;
3650    module->mOutputProfiles.add(profile);
3651
3652    profile = new IOProfile(module);
3653    profile->mSamplingRates.add(8000);
3654    profile->mFormats.add(AUDIO_FORMAT_PCM_16_BIT);
3655    profile->mChannelMasks.add(AUDIO_CHANNEL_IN_MONO);
3656    profile->mSupportedDevices = AUDIO_DEVICE_IN_BUILTIN_MIC;
3657    module->mInputProfiles.add(profile);
3658
3659    mHwModules.add(module);
3660}
3661
3662}; // namespace android
3663