AudioPolicyService.cpp revision d2dcb08808aed82218b258726fa66f8e095a3f9c 
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 "AudioPolicyService"
18//#define LOG_NDEBUG 0
19
20#undef __STRICT_ANSI__
21#define __STDINT_LIMITS
22#define __STDC_LIMIT_MACROS
23#include <stdint.h>
24
25#include <sys/time.h>
26#include <binder/IServiceManager.h>
27#include <utils/Log.h>
28#include <cutils/properties.h>
29#include <binder/IPCThreadState.h>
30#include <utils/String16.h>
31#include <utils/threads.h>
32#include "AudioPolicyService.h"
33#include <hardware_legacy/AudioPolicyManagerBase.h>
34#include <cutils/properties.h>
35#include <dlfcn.h>
36#include <hardware_legacy/power.h>
37
38// ----------------------------------------------------------------------------
39// the sim build doesn't have gettid
40
41#ifndef HAVE_GETTID
42# define gettid getpid
43#endif
44
45namespace android {
46
47
48static const char *kDeadlockedString = "AudioPolicyService may be deadlocked\n";
49static const char *kCmdDeadlockedString = "AudioPolicyService command thread may be deadlocked\n";
50
51static const int kDumpLockRetries = 50;
52static const int kDumpLockSleep = 20000;
53
54static bool checkPermission() {
55#ifndef HAVE_ANDROID_OS
56    return true;
57#endif
58    if (getpid() == IPCThreadState::self()->getCallingPid()) return true;
59    bool ok = checkCallingPermission(String16("android.permission.MODIFY_AUDIO_SETTINGS"));
60    if (!ok) LOGE("Request requires android.permission.MODIFY_AUDIO_SETTINGS");
61    return ok;
62}
63
64// ----------------------------------------------------------------------------
65
66AudioPolicyService::AudioPolicyService()
67    : BnAudioPolicyService() , mpPolicyManager(NULL)
68{
69    char value[PROPERTY_VALUE_MAX];
70
71    Mutex::Autolock _l(mLock);
72
73    // start tone playback thread
74    mTonePlaybackThread = new AudioCommandThread(String8(""));
75    // start audio commands thread
76    mAudioCommandThread = new AudioCommandThread(String8("ApmCommandThread"));
77
78#if (defined GENERIC_AUDIO) || (defined AUDIO_POLICY_TEST)
79    mpPolicyManager = new AudioPolicyManagerBase(this);
80    LOGV("build for GENERIC_AUDIO - using generic audio policy");
81#else
82    // if running in emulation - use the emulator driver
83    if (property_get("ro.kernel.qemu", value, 0)) {
84        LOGV("Running in emulation - using generic audio policy");
85        mpPolicyManager = new AudioPolicyManagerBase(this);
86    }
87    else {
88        LOGV("Using hardware specific audio policy");
89        mpPolicyManager = createAudioPolicyManager(this);
90    }
91#endif
92
93    if ((mpPolicyManager != NULL) && (mpPolicyManager->initCheck() != NO_ERROR)) {
94        delete mpPolicyManager;
95        mpPolicyManager = NULL;
96    }
97
98    if (mpPolicyManager == NULL) {
99        LOGE("Could not create AudioPolicyManager");
100    } else {
101        // load properties
102        property_get("ro.camera.sound.forced", value, "0");
103        mpPolicyManager->setSystemProperty("ro.camera.sound.forced", value);
104    }
105}
106
107AudioPolicyService::~AudioPolicyService()
108{
109    mTonePlaybackThread->exit();
110    mTonePlaybackThread.clear();
111    mAudioCommandThread->exit();
112    mAudioCommandThread.clear();
113
114    if (mpPolicyManager) {
115        delete mpPolicyManager;
116    }
117}
118
119
120status_t AudioPolicyService::setDeviceConnectionState(AudioSystem::audio_devices device,
121                                                  AudioSystem::device_connection_state state,
122                                                  const char *device_address)
123{
124    if (mpPolicyManager == NULL) {
125        return NO_INIT;
126    }
127    if (!checkPermission()) {
128        return PERMISSION_DENIED;
129    }
130    if (!AudioSystem::isOutputDevice(device) && !AudioSystem::isInputDevice(device)) {
131        return BAD_VALUE;
132    }
133    if (state != AudioSystem::DEVICE_STATE_AVAILABLE &&
134            state != AudioSystem::DEVICE_STATE_UNAVAILABLE) {
135        return BAD_VALUE;
136    }
137
138    LOGV("setDeviceConnectionState() tid %d", gettid());
139    Mutex::Autolock _l(mLock);
140    return mpPolicyManager->setDeviceConnectionState(device, state, device_address);
141}
142
143AudioSystem::device_connection_state AudioPolicyService::getDeviceConnectionState(
144                                                              AudioSystem::audio_devices device,
145                                                              const char *device_address)
146{
147    if (mpPolicyManager == NULL) {
148        return AudioSystem::DEVICE_STATE_UNAVAILABLE;
149    }
150    if (!checkPermission()) {
151        return AudioSystem::DEVICE_STATE_UNAVAILABLE;
152    }
153    return mpPolicyManager->getDeviceConnectionState(device, device_address);
154}
155
156status_t AudioPolicyService::setPhoneState(int state)
157{
158    if (mpPolicyManager == NULL) {
159        return NO_INIT;
160    }
161    if (!checkPermission()) {
162        return PERMISSION_DENIED;
163    }
164    if (state < 0 || state >= AudioSystem::NUM_MODES) {
165        return BAD_VALUE;
166    }
167
168    LOGV("setPhoneState() tid %d", gettid());
169
170    // TODO: check if it is more appropriate to do it in platform specific policy manager
171    AudioSystem::setMode(state);
172
173    Mutex::Autolock _l(mLock);
174    mpPolicyManager->setPhoneState(state);
175    return NO_ERROR;
176}
177
178status_t AudioPolicyService::setRingerMode(uint32_t mode, uint32_t mask)
179{
180    if (mpPolicyManager == NULL) {
181        return NO_INIT;
182    }
183    if (!checkPermission()) {
184        return PERMISSION_DENIED;
185    }
186
187    mpPolicyManager->setRingerMode(mode, mask);
188    return NO_ERROR;
189}
190
191status_t AudioPolicyService::setForceUse(AudioSystem::force_use usage,
192                                         AudioSystem::forced_config config)
193{
194    if (mpPolicyManager == NULL) {
195        return NO_INIT;
196    }
197    if (!checkPermission()) {
198        return PERMISSION_DENIED;
199    }
200    if (usage < 0 || usage >= AudioSystem::NUM_FORCE_USE) {
201        return BAD_VALUE;
202    }
203    if (config < 0 || config >= AudioSystem::NUM_FORCE_CONFIG) {
204        return BAD_VALUE;
205    }
206    LOGV("setForceUse() tid %d", gettid());
207    Mutex::Autolock _l(mLock);
208    mpPolicyManager->setForceUse(usage, config);
209    return NO_ERROR;
210}
211
212AudioSystem::forced_config AudioPolicyService::getForceUse(AudioSystem::force_use usage)
213{
214    if (mpPolicyManager == NULL) {
215        return AudioSystem::FORCE_NONE;
216    }
217    if (!checkPermission()) {
218        return AudioSystem::FORCE_NONE;
219    }
220    if (usage < 0 || usage >= AudioSystem::NUM_FORCE_USE) {
221        return AudioSystem::FORCE_NONE;
222    }
223    return mpPolicyManager->getForceUse(usage);
224}
225
226audio_io_handle_t AudioPolicyService::getOutput(AudioSystem::stream_type stream,
227                                    uint32_t samplingRate,
228                                    uint32_t format,
229                                    uint32_t channels,
230                                    AudioSystem::output_flags flags)
231{
232    if (mpPolicyManager == NULL) {
233        return 0;
234    }
235    LOGV("getOutput() tid %d", gettid());
236    Mutex::Autolock _l(mLock);
237    return mpPolicyManager->getOutput(stream, samplingRate, format, channels, flags);
238}
239
240status_t AudioPolicyService::startOutput(audio_io_handle_t output,
241                                         AudioSystem::stream_type stream,
242                                         int session)
243{
244    if (mpPolicyManager == NULL) {
245        return NO_INIT;
246    }
247    LOGV("startOutput() tid %d", gettid());
248    Mutex::Autolock _l(mLock);
249    return mpPolicyManager->startOutput(output, stream, session);
250}
251
252status_t AudioPolicyService::stopOutput(audio_io_handle_t output,
253                                        AudioSystem::stream_type stream,
254                                        int session)
255{
256    if (mpPolicyManager == NULL) {
257        return NO_INIT;
258    }
259    LOGV("stopOutput() tid %d", gettid());
260    Mutex::Autolock _l(mLock);
261    return mpPolicyManager->stopOutput(output, stream, session);
262}
263
264void AudioPolicyService::releaseOutput(audio_io_handle_t output)
265{
266    if (mpPolicyManager == NULL) {
267        return;
268    }
269    LOGV("releaseOutput() tid %d", gettid());
270    Mutex::Autolock _l(mLock);
271    mpPolicyManager->releaseOutput(output);
272}
273
274audio_io_handle_t AudioPolicyService::getInput(int inputSource,
275                                    uint32_t samplingRate,
276                                    uint32_t format,
277                                    uint32_t channels,
278                                    AudioSystem::audio_in_acoustics acoustics)
279{
280    if (mpPolicyManager == NULL) {
281        return 0;
282    }
283    Mutex::Autolock _l(mLock);
284    return mpPolicyManager->getInput(inputSource, samplingRate, format, channels, acoustics);
285}
286
287status_t AudioPolicyService::startInput(audio_io_handle_t input)
288{
289    if (mpPolicyManager == NULL) {
290        return NO_INIT;
291    }
292    Mutex::Autolock _l(mLock);
293    return mpPolicyManager->startInput(input);
294}
295
296status_t AudioPolicyService::stopInput(audio_io_handle_t input)
297{
298    if (mpPolicyManager == NULL) {
299        return NO_INIT;
300    }
301    Mutex::Autolock _l(mLock);
302    return mpPolicyManager->stopInput(input);
303}
304
305void AudioPolicyService::releaseInput(audio_io_handle_t input)
306{
307    if (mpPolicyManager == NULL) {
308        return;
309    }
310    Mutex::Autolock _l(mLock);
311    mpPolicyManager->releaseInput(input);
312}
313
314status_t AudioPolicyService::initStreamVolume(AudioSystem::stream_type stream,
315                                            int indexMin,
316                                            int indexMax)
317{
318    if (mpPolicyManager == NULL) {
319        return NO_INIT;
320    }
321    if (!checkPermission()) {
322        return PERMISSION_DENIED;
323    }
324    if (stream < 0 || stream >= AudioSystem::NUM_STREAM_TYPES) {
325        return BAD_VALUE;
326    }
327    mpPolicyManager->initStreamVolume(stream, indexMin, indexMax);
328    return NO_ERROR;
329}
330
331status_t AudioPolicyService::setStreamVolumeIndex(AudioSystem::stream_type stream, int index)
332{
333    if (mpPolicyManager == NULL) {
334        return NO_INIT;
335    }
336    if (!checkPermission()) {
337        return PERMISSION_DENIED;
338    }
339    if (stream < 0 || stream >= AudioSystem::NUM_STREAM_TYPES) {
340        return BAD_VALUE;
341    }
342
343    return mpPolicyManager->setStreamVolumeIndex(stream, index);
344}
345
346status_t AudioPolicyService::getStreamVolumeIndex(AudioSystem::stream_type stream, int *index)
347{
348    if (mpPolicyManager == NULL) {
349        return NO_INIT;
350    }
351    if (!checkPermission()) {
352        return PERMISSION_DENIED;
353    }
354    if (stream < 0 || stream >= AudioSystem::NUM_STREAM_TYPES) {
355        return BAD_VALUE;
356    }
357    return mpPolicyManager->getStreamVolumeIndex(stream, index);
358}
359
360uint32_t AudioPolicyService::getStrategyForStream(AudioSystem::stream_type stream)
361{
362    if (mpPolicyManager == NULL) {
363        return 0;
364    }
365    return mpPolicyManager->getStrategyForStream(stream);
366}
367
368audio_io_handle_t AudioPolicyService::getOutputForEffect(effect_descriptor_t *desc)
369{
370    if (mpPolicyManager == NULL) {
371        return NO_INIT;
372    }
373    Mutex::Autolock _l(mLock);
374    return mpPolicyManager->getOutputForEffect(desc);
375}
376
377status_t AudioPolicyService::registerEffect(effect_descriptor_t *desc,
378                                audio_io_handle_t output,
379                                uint32_t strategy,
380                                int session,
381                                int id)
382{
383    if (mpPolicyManager == NULL) {
384        return NO_INIT;
385    }
386    return mpPolicyManager->registerEffect(desc, output, strategy, session, id);
387}
388
389status_t AudioPolicyService::unregisterEffect(int id)
390{
391    if (mpPolicyManager == NULL) {
392        return NO_INIT;
393    }
394    return mpPolicyManager->unregisterEffect(id);
395}
396
397void AudioPolicyService::binderDied(const wp<IBinder>& who) {
398    LOGW("binderDied() %p, tid %d, calling tid %d", who.unsafe_get(), gettid(),
399            IPCThreadState::self()->getCallingPid());
400}
401
402static bool tryLock(Mutex& mutex)
403{
404    bool locked = false;
405    for (int i = 0; i < kDumpLockRetries; ++i) {
406        if (mutex.tryLock() == NO_ERROR) {
407            locked = true;
408            break;
409        }
410        usleep(kDumpLockSleep);
411    }
412    return locked;
413}
414
415status_t AudioPolicyService::dumpInternals(int fd)
416{
417    const size_t SIZE = 256;
418    char buffer[SIZE];
419    String8 result;
420
421    snprintf(buffer, SIZE, "PolicyManager Interface: %p\n", mpPolicyManager);
422    result.append(buffer);
423    snprintf(buffer, SIZE, "Command Thread: %p\n", mAudioCommandThread.get());
424    result.append(buffer);
425    snprintf(buffer, SIZE, "Tones Thread: %p\n", mTonePlaybackThread.get());
426    result.append(buffer);
427
428    write(fd, result.string(), result.size());
429    return NO_ERROR;
430}
431
432status_t AudioPolicyService::dump(int fd, const Vector<String16>& args)
433{
434    if (checkCallingPermission(String16("android.permission.DUMP")) == false) {
435        dumpPermissionDenial(fd);
436    } else {
437        bool locked = tryLock(mLock);
438        if (!locked) {
439            String8 result(kDeadlockedString);
440            write(fd, result.string(), result.size());
441        }
442
443        dumpInternals(fd);
444        if (mAudioCommandThread != NULL) {
445            mAudioCommandThread->dump(fd);
446        }
447        if (mTonePlaybackThread != NULL) {
448            mTonePlaybackThread->dump(fd);
449        }
450
451        if (mpPolicyManager) {
452            mpPolicyManager->dump(fd);
453        }
454
455        if (locked) mLock.unlock();
456    }
457    return NO_ERROR;
458}
459
460status_t AudioPolicyService::dumpPermissionDenial(int fd)
461{
462    const size_t SIZE = 256;
463    char buffer[SIZE];
464    String8 result;
465    snprintf(buffer, SIZE, "Permission Denial: "
466            "can't dump AudioPolicyService from pid=%d, uid=%d\n",
467            IPCThreadState::self()->getCallingPid(),
468            IPCThreadState::self()->getCallingUid());
469    result.append(buffer);
470    write(fd, result.string(), result.size());
471    return NO_ERROR;
472}
473
474status_t AudioPolicyService::onTransact(
475        uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
476{
477    return BnAudioPolicyService::onTransact(code, data, reply, flags);
478}
479
480
481// ----------------------------------------------------------------------------
482// AudioPolicyClientInterface implementation
483// ----------------------------------------------------------------------------
484
485
486audio_io_handle_t AudioPolicyService::openOutput(uint32_t *pDevices,
487                                uint32_t *pSamplingRate,
488                                uint32_t *pFormat,
489                                uint32_t *pChannels,
490                                uint32_t *pLatencyMs,
491                                AudioSystem::output_flags flags)
492{
493    sp<IAudioFlinger> af = AudioSystem::get_audio_flinger();
494    if (af == 0) {
495        LOGW("openOutput() could not get AudioFlinger");
496        return 0;
497    }
498
499    return af->openOutput(pDevices,
500                          pSamplingRate,
501                          (uint32_t *)pFormat,
502                          pChannels,
503                          pLatencyMs,
504                          flags);
505}
506
507audio_io_handle_t AudioPolicyService::openDuplicateOutput(audio_io_handle_t output1,
508                                                          audio_io_handle_t output2)
509{
510    sp<IAudioFlinger> af = AudioSystem::get_audio_flinger();
511    if (af == 0) {
512        LOGW("openDuplicateOutput() could not get AudioFlinger");
513        return 0;
514    }
515    return af->openDuplicateOutput(output1, output2);
516}
517
518status_t AudioPolicyService::closeOutput(audio_io_handle_t output)
519{
520    sp<IAudioFlinger> af = AudioSystem::get_audio_flinger();
521    if (af == 0) return PERMISSION_DENIED;
522
523    return af->closeOutput(output);
524}
525
526
527status_t AudioPolicyService::suspendOutput(audio_io_handle_t output)
528{
529    sp<IAudioFlinger> af = AudioSystem::get_audio_flinger();
530    if (af == 0) {
531        LOGW("suspendOutput() could not get AudioFlinger");
532        return PERMISSION_DENIED;
533    }
534
535    return af->suspendOutput(output);
536}
537
538status_t AudioPolicyService::restoreOutput(audio_io_handle_t output)
539{
540    sp<IAudioFlinger> af = AudioSystem::get_audio_flinger();
541    if (af == 0) {
542        LOGW("restoreOutput() could not get AudioFlinger");
543        return PERMISSION_DENIED;
544    }
545
546    return af->restoreOutput(output);
547}
548
549audio_io_handle_t AudioPolicyService::openInput(uint32_t *pDevices,
550                                uint32_t *pSamplingRate,
551                                uint32_t *pFormat,
552                                uint32_t *pChannels,
553                                uint32_t acoustics)
554{
555    sp<IAudioFlinger> af = AudioSystem::get_audio_flinger();
556    if (af == 0) {
557        LOGW("openInput() could not get AudioFlinger");
558        return 0;
559    }
560
561    return af->openInput(pDevices, pSamplingRate, (uint32_t *)pFormat, pChannels, acoustics);
562}
563
564status_t AudioPolicyService::closeInput(audio_io_handle_t input)
565{
566    sp<IAudioFlinger> af = AudioSystem::get_audio_flinger();
567    if (af == 0) return PERMISSION_DENIED;
568
569    return af->closeInput(input);
570}
571
572status_t AudioPolicyService::setStreamVolume(AudioSystem::stream_type stream,
573                                             float volume,
574                                             audio_io_handle_t output,
575                                             int delayMs)
576{
577    return mAudioCommandThread->volumeCommand((int)stream, volume, (int)output, delayMs);
578}
579
580status_t AudioPolicyService::setStreamOutput(AudioSystem::stream_type stream,
581                                             audio_io_handle_t output)
582{
583    sp<IAudioFlinger> af = AudioSystem::get_audio_flinger();
584    if (af == 0) return PERMISSION_DENIED;
585
586    return af->setStreamOutput(stream, output);
587}
588
589status_t AudioPolicyService::moveEffects(int session, audio_io_handle_t srcOutput,
590                                               audio_io_handle_t dstOutput)
591{
592    sp<IAudioFlinger> af = AudioSystem::get_audio_flinger();
593    if (af == 0) return PERMISSION_DENIED;
594
595    return af->moveEffects(session, (int)srcOutput, (int)dstOutput);
596}
597
598void AudioPolicyService::setParameters(audio_io_handle_t ioHandle,
599                                       const String8& keyValuePairs,
600                                       int delayMs)
601{
602    mAudioCommandThread->parametersCommand((int)ioHandle, keyValuePairs, delayMs);
603}
604
605String8 AudioPolicyService::getParameters(audio_io_handle_t ioHandle, const String8& keys)
606{
607    String8 result = AudioSystem::getParameters(ioHandle, keys);
608    return result;
609}
610
611status_t AudioPolicyService::startTone(ToneGenerator::tone_type tone,
612                                       AudioSystem::stream_type stream)
613{
614    mTonePlaybackThread->startToneCommand(tone, stream);
615    return NO_ERROR;
616}
617
618status_t AudioPolicyService::stopTone()
619{
620    mTonePlaybackThread->stopToneCommand();
621    return NO_ERROR;
622}
623
624status_t AudioPolicyService::setVoiceVolume(float volume, int delayMs)
625{
626    return mAudioCommandThread->voiceVolumeCommand(volume, delayMs);
627}
628
629// -----------  AudioPolicyService::AudioCommandThread implementation ----------
630
631AudioPolicyService::AudioCommandThread::AudioCommandThread(String8 name)
632    : Thread(false), mName(name)
633{
634    mpToneGenerator = NULL;
635}
636
637
638AudioPolicyService::AudioCommandThread::~AudioCommandThread()
639{
640    if (mName != "" && !mAudioCommands.isEmpty()) {
641        release_wake_lock(mName.string());
642    }
643    mAudioCommands.clear();
644    if (mpToneGenerator != NULL) delete mpToneGenerator;
645}
646
647void AudioPolicyService::AudioCommandThread::onFirstRef()
648{
649    if (mName != "") {
650        run(mName.string(), ANDROID_PRIORITY_AUDIO);
651    } else {
652        run("AudioCommandThread", ANDROID_PRIORITY_AUDIO);
653    }
654}
655
656bool AudioPolicyService::AudioCommandThread::threadLoop()
657{
658    nsecs_t waitTime = INT64_MAX;
659
660    mLock.lock();
661    while (!exitPending())
662    {
663        while(!mAudioCommands.isEmpty()) {
664            nsecs_t curTime = systemTime();
665            // commands are sorted by increasing time stamp: execute them from index 0 and up
666            if (mAudioCommands[0]->mTime <= curTime) {
667                AudioCommand *command = mAudioCommands[0];
668                mAudioCommands.removeAt(0);
669                mLastCommand = *command;
670
671                switch (command->mCommand) {
672                case START_TONE: {
673                    mLock.unlock();
674                    ToneData *data = (ToneData *)command->mParam;
675                    LOGV("AudioCommandThread() processing start tone %d on stream %d",
676                            data->mType, data->mStream);
677                    if (mpToneGenerator != NULL)
678                        delete mpToneGenerator;
679                    mpToneGenerator = new ToneGenerator(data->mStream, 1.0);
680                    mpToneGenerator->startTone(data->mType);
681                    delete data;
682                    mLock.lock();
683                    }break;
684                case STOP_TONE: {
685                    mLock.unlock();
686                    LOGV("AudioCommandThread() processing stop tone");
687                    if (mpToneGenerator != NULL) {
688                        mpToneGenerator->stopTone();
689                        delete mpToneGenerator;
690                        mpToneGenerator = NULL;
691                    }
692                    mLock.lock();
693                    }break;
694                case SET_VOLUME: {
695                    VolumeData *data = (VolumeData *)command->mParam;
696                    LOGV("AudioCommandThread() processing set volume stream %d, \
697                            volume %f, output %d", data->mStream, data->mVolume, data->mIO);
698                    command->mStatus = AudioSystem::setStreamVolume(data->mStream,
699                                                                    data->mVolume,
700                                                                    data->mIO);
701                    if (command->mWaitStatus) {
702                        command->mCond.signal();
703                        mWaitWorkCV.wait(mLock);
704                    }
705                    delete data;
706                    }break;
707                case SET_PARAMETERS: {
708                     ParametersData *data = (ParametersData *)command->mParam;
709                     LOGV("AudioCommandThread() processing set parameters string %s, io %d",
710                             data->mKeyValuePairs.string(), data->mIO);
711                     command->mStatus = AudioSystem::setParameters(data->mIO, data->mKeyValuePairs);
712                     if (command->mWaitStatus) {
713                         command->mCond.signal();
714                         mWaitWorkCV.wait(mLock);
715                     }
716                     delete data;
717                     }break;
718                case SET_VOICE_VOLUME: {
719                    VoiceVolumeData *data = (VoiceVolumeData *)command->mParam;
720                    LOGV("AudioCommandThread() processing set voice volume volume %f",
721                            data->mVolume);
722                    command->mStatus = AudioSystem::setVoiceVolume(data->mVolume);
723                    if (command->mWaitStatus) {
724                        command->mCond.signal();
725                        mWaitWorkCV.wait(mLock);
726                    }
727                    delete data;
728                    }break;
729                default:
730                    LOGW("AudioCommandThread() unknown command %d", command->mCommand);
731                }
732                delete command;
733                waitTime = INT64_MAX;
734            } else {
735                waitTime = mAudioCommands[0]->mTime - curTime;
736                break;
737            }
738        }
739        // release delayed commands wake lock
740        if (mName != "" && mAudioCommands.isEmpty()) {
741            release_wake_lock(mName.string());
742        }
743        LOGV("AudioCommandThread() going to sleep");
744        mWaitWorkCV.waitRelative(mLock, waitTime);
745        LOGV("AudioCommandThread() waking up");
746    }
747    mLock.unlock();
748    return false;
749}
750
751status_t AudioPolicyService::AudioCommandThread::dump(int fd)
752{
753    const size_t SIZE = 256;
754    char buffer[SIZE];
755    String8 result;
756
757    snprintf(buffer, SIZE, "AudioCommandThread %p Dump\n", this);
758    result.append(buffer);
759    write(fd, result.string(), result.size());
760
761    bool locked = tryLock(mLock);
762    if (!locked) {
763        String8 result2(kCmdDeadlockedString);
764        write(fd, result2.string(), result2.size());
765    }
766
767    snprintf(buffer, SIZE, "- Commands:\n");
768    result = String8(buffer);
769    result.append("   Command Time        Wait pParam\n");
770    for (int i = 0; i < (int)mAudioCommands.size(); i++) {
771        mAudioCommands[i]->dump(buffer, SIZE);
772        result.append(buffer);
773    }
774    result.append("  Last Command\n");
775    mLastCommand.dump(buffer, SIZE);
776    result.append(buffer);
777
778    write(fd, result.string(), result.size());
779
780    if (locked) mLock.unlock();
781
782    return NO_ERROR;
783}
784
785void AudioPolicyService::AudioCommandThread::startToneCommand(int type, int stream)
786{
787    AudioCommand *command = new AudioCommand();
788    command->mCommand = START_TONE;
789    ToneData *data = new ToneData();
790    data->mType = type;
791    data->mStream = stream;
792    command->mParam = (void *)data;
793    command->mWaitStatus = false;
794    Mutex::Autolock _l(mLock);
795    insertCommand_l(command);
796    LOGV("AudioCommandThread() adding tone start type %d, stream %d", type, stream);
797    mWaitWorkCV.signal();
798}
799
800void AudioPolicyService::AudioCommandThread::stopToneCommand()
801{
802    AudioCommand *command = new AudioCommand();
803    command->mCommand = STOP_TONE;
804    command->mParam = NULL;
805    command->mWaitStatus = false;
806    Mutex::Autolock _l(mLock);
807    insertCommand_l(command);
808    LOGV("AudioCommandThread() adding tone stop");
809    mWaitWorkCV.signal();
810}
811
812status_t AudioPolicyService::AudioCommandThread::volumeCommand(int stream,
813                                                               float volume,
814                                                               int output,
815                                                               int delayMs)
816{
817    status_t status = NO_ERROR;
818
819    AudioCommand *command = new AudioCommand();
820    command->mCommand = SET_VOLUME;
821    VolumeData *data = new VolumeData();
822    data->mStream = stream;
823    data->mVolume = volume;
824    data->mIO = output;
825    command->mParam = data;
826    if (delayMs == 0) {
827        command->mWaitStatus = true;
828    } else {
829        command->mWaitStatus = false;
830    }
831    Mutex::Autolock _l(mLock);
832    insertCommand_l(command, delayMs);
833    LOGV("AudioCommandThread() adding set volume stream %d, volume %f, output %d",
834            stream, volume, output);
835    mWaitWorkCV.signal();
836    if (command->mWaitStatus) {
837        command->mCond.wait(mLock);
838        status =  command->mStatus;
839        mWaitWorkCV.signal();
840    }
841    return status;
842}
843
844status_t AudioPolicyService::AudioCommandThread::parametersCommand(int ioHandle,
845                                                                   const String8& keyValuePairs,
846                                                                   int delayMs)
847{
848    status_t status = NO_ERROR;
849
850    AudioCommand *command = new AudioCommand();
851    command->mCommand = SET_PARAMETERS;
852    ParametersData *data = new ParametersData();
853    data->mIO = ioHandle;
854    data->mKeyValuePairs = keyValuePairs;
855    command->mParam = data;
856    if (delayMs == 0) {
857        command->mWaitStatus = true;
858    } else {
859        command->mWaitStatus = false;
860    }
861    Mutex::Autolock _l(mLock);
862    insertCommand_l(command, delayMs);
863    LOGV("AudioCommandThread() adding set parameter string %s, io %d ,delay %d",
864            keyValuePairs.string(), ioHandle, delayMs);
865    mWaitWorkCV.signal();
866    if (command->mWaitStatus) {
867        command->mCond.wait(mLock);
868        status =  command->mStatus;
869        mWaitWorkCV.signal();
870    }
871    return status;
872}
873
874status_t AudioPolicyService::AudioCommandThread::voiceVolumeCommand(float volume, int delayMs)
875{
876    status_t status = NO_ERROR;
877
878    AudioCommand *command = new AudioCommand();
879    command->mCommand = SET_VOICE_VOLUME;
880    VoiceVolumeData *data = new VoiceVolumeData();
881    data->mVolume = volume;
882    command->mParam = data;
883    if (delayMs == 0) {
884        command->mWaitStatus = true;
885    } else {
886        command->mWaitStatus = false;
887    }
888    Mutex::Autolock _l(mLock);
889    insertCommand_l(command, delayMs);
890    LOGV("AudioCommandThread() adding set voice volume volume %f", volume);
891    mWaitWorkCV.signal();
892    if (command->mWaitStatus) {
893        command->mCond.wait(mLock);
894        status =  command->mStatus;
895        mWaitWorkCV.signal();
896    }
897    return status;
898}
899
900// insertCommand_l() must be called with mLock held
901void AudioPolicyService::AudioCommandThread::insertCommand_l(AudioCommand *command, int delayMs)
902{
903    ssize_t i;
904    Vector <AudioCommand *> removedCommands;
905
906    command->mTime = systemTime() + milliseconds(delayMs);
907
908    // acquire wake lock to make sure delayed commands are processed
909    if (mName != "" && mAudioCommands.isEmpty()) {
910        acquire_wake_lock(PARTIAL_WAKE_LOCK, mName.string());
911    }
912
913    // check same pending commands with later time stamps and eliminate them
914    for (i = mAudioCommands.size()-1; i >= 0; i--) {
915        AudioCommand *command2 = mAudioCommands[i];
916        // commands are sorted by increasing time stamp: no need to scan the rest of mAudioCommands
917        if (command2->mTime <= command->mTime) break;
918        if (command2->mCommand != command->mCommand) continue;
919
920        switch (command->mCommand) {
921        case SET_PARAMETERS: {
922            ParametersData *data = (ParametersData *)command->mParam;
923            ParametersData *data2 = (ParametersData *)command2->mParam;
924            if (data->mIO != data2->mIO) break;
925            LOGV("Comparing parameter command %s to new command %s",
926                    data2->mKeyValuePairs.string(), data->mKeyValuePairs.string());
927            AudioParameter param = AudioParameter(data->mKeyValuePairs);
928            AudioParameter param2 = AudioParameter(data2->mKeyValuePairs);
929            for (size_t j = 0; j < param.size(); j++) {
930               String8 key;
931               String8 value;
932               param.getAt(j, key, value);
933               for (size_t k = 0; k < param2.size(); k++) {
934                  String8 key2;
935                  String8 value2;
936                  param2.getAt(k, key2, value2);
937                  if (key2 == key) {
938                      param2.remove(key2);
939                      LOGV("Filtering out parameter %s", key2.string());
940                      break;
941                  }
942               }
943            }
944            // if all keys have been filtered out, remove the command.
945            // otherwise, update the key value pairs
946            if (param2.size() == 0) {
947                removedCommands.add(command2);
948            } else {
949                data2->mKeyValuePairs = param2.toString();
950            }
951        } break;
952
953        case SET_VOLUME: {
954            VolumeData *data = (VolumeData *)command->mParam;
955            VolumeData *data2 = (VolumeData *)command2->mParam;
956            if (data->mIO != data2->mIO) break;
957            if (data->mStream != data2->mStream) break;
958            LOGV("Filtering out volume command on output %d for stream %d",
959                    data->mIO, data->mStream);
960            removedCommands.add(command2);
961        } break;
962        case START_TONE:
963        case STOP_TONE:
964        default:
965            break;
966        }
967    }
968
969    // remove filtered commands
970    for (size_t j = 0; j < removedCommands.size(); j++) {
971        // removed commands always have time stamps greater than current command
972        for (size_t k = i + 1; k < mAudioCommands.size(); k++) {
973            if (mAudioCommands[k] == removedCommands[j]) {
974                LOGV("suppressing command: %d", mAudioCommands[k]->mCommand);
975                mAudioCommands.removeAt(k);
976                break;
977            }
978        }
979    }
980    removedCommands.clear();
981
982    // insert command at the right place according to its time stamp
983    LOGV("inserting command: %d at index %d, num commands %d",
984            command->mCommand, (int)i+1, mAudioCommands.size());
985    mAudioCommands.insertAt(command, i + 1);
986}
987
988void AudioPolicyService::AudioCommandThread::exit()
989{
990    LOGV("AudioCommandThread::exit");
991    {
992        AutoMutex _l(mLock);
993        requestExit();
994        mWaitWorkCV.signal();
995    }
996    requestExitAndWait();
997}
998
999void AudioPolicyService::AudioCommandThread::AudioCommand::dump(char* buffer, size_t size)
1000{
1001    snprintf(buffer, size, "   %02d      %06d.%03d  %01u    %p\n",
1002            mCommand,
1003            (int)ns2s(mTime),
1004            (int)ns2ms(mTime)%1000,
1005            mWaitStatus,
1006            mParam);
1007}
1008
1009}; // namespace android
1010