AudioPolicyService.cpp revision 802da7bc462f6f9df6e681cc75c51dc0a056a4a1 
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
397bool AudioPolicyService::isStreamActive(int stream, uint32_t inPastMs) const
398{
399    if (mpPolicyManager == NULL) {
400        return 0;
401    }
402    Mutex::Autolock _l(mLock);
403    return mpPolicyManager->isStreamActive(stream, inPastMs);
404}
405
406void AudioPolicyService::binderDied(const wp<IBinder>& who) {
407    LOGW("binderDied() %p, tid %d, calling tid %d", who.unsafe_get(), gettid(),
408            IPCThreadState::self()->getCallingPid());
409}
410
411static bool tryLock(Mutex& mutex)
412{
413    bool locked = false;
414    for (int i = 0; i < kDumpLockRetries; ++i) {
415        if (mutex.tryLock() == NO_ERROR) {
416            locked = true;
417            break;
418        }
419        usleep(kDumpLockSleep);
420    }
421    return locked;
422}
423
424status_t AudioPolicyService::dumpInternals(int fd)
425{
426    const size_t SIZE = 256;
427    char buffer[SIZE];
428    String8 result;
429
430    snprintf(buffer, SIZE, "PolicyManager Interface: %p\n", mpPolicyManager);
431    result.append(buffer);
432    snprintf(buffer, SIZE, "Command Thread: %p\n", mAudioCommandThread.get());
433    result.append(buffer);
434    snprintf(buffer, SIZE, "Tones Thread: %p\n", mTonePlaybackThread.get());
435    result.append(buffer);
436
437    write(fd, result.string(), result.size());
438    return NO_ERROR;
439}
440
441status_t AudioPolicyService::dump(int fd, const Vector<String16>& args)
442{
443    if (checkCallingPermission(String16("android.permission.DUMP")) == false) {
444        dumpPermissionDenial(fd);
445    } else {
446        bool locked = tryLock(mLock);
447        if (!locked) {
448            String8 result(kDeadlockedString);
449            write(fd, result.string(), result.size());
450        }
451
452        dumpInternals(fd);
453        if (mAudioCommandThread != NULL) {
454            mAudioCommandThread->dump(fd);
455        }
456        if (mTonePlaybackThread != NULL) {
457            mTonePlaybackThread->dump(fd);
458        }
459
460        if (mpPolicyManager) {
461            mpPolicyManager->dump(fd);
462        }
463
464        if (locked) mLock.unlock();
465    }
466    return NO_ERROR;
467}
468
469status_t AudioPolicyService::dumpPermissionDenial(int fd)
470{
471    const size_t SIZE = 256;
472    char buffer[SIZE];
473    String8 result;
474    snprintf(buffer, SIZE, "Permission Denial: "
475            "can't dump AudioPolicyService from pid=%d, uid=%d\n",
476            IPCThreadState::self()->getCallingPid(),
477            IPCThreadState::self()->getCallingUid());
478    result.append(buffer);
479    write(fd, result.string(), result.size());
480    return NO_ERROR;
481}
482
483status_t AudioPolicyService::onTransact(
484        uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
485{
486    return BnAudioPolicyService::onTransact(code, data, reply, flags);
487}
488
489
490// ----------------------------------------------------------------------------
491// AudioPolicyClientInterface implementation
492// ----------------------------------------------------------------------------
493
494
495audio_io_handle_t AudioPolicyService::openOutput(uint32_t *pDevices,
496                                uint32_t *pSamplingRate,
497                                uint32_t *pFormat,
498                                uint32_t *pChannels,
499                                uint32_t *pLatencyMs,
500                                AudioSystem::output_flags flags)
501{
502    sp<IAudioFlinger> af = AudioSystem::get_audio_flinger();
503    if (af == 0) {
504        LOGW("openOutput() could not get AudioFlinger");
505        return 0;
506    }
507
508    return af->openOutput(pDevices,
509                          pSamplingRate,
510                          (uint32_t *)pFormat,
511                          pChannels,
512                          pLatencyMs,
513                          flags);
514}
515
516audio_io_handle_t AudioPolicyService::openDuplicateOutput(audio_io_handle_t output1,
517                                                          audio_io_handle_t output2)
518{
519    sp<IAudioFlinger> af = AudioSystem::get_audio_flinger();
520    if (af == 0) {
521        LOGW("openDuplicateOutput() could not get AudioFlinger");
522        return 0;
523    }
524    return af->openDuplicateOutput(output1, output2);
525}
526
527status_t AudioPolicyService::closeOutput(audio_io_handle_t output)
528{
529    sp<IAudioFlinger> af = AudioSystem::get_audio_flinger();
530    if (af == 0) return PERMISSION_DENIED;
531
532    return af->closeOutput(output);
533}
534
535
536status_t AudioPolicyService::suspendOutput(audio_io_handle_t output)
537{
538    sp<IAudioFlinger> af = AudioSystem::get_audio_flinger();
539    if (af == 0) {
540        LOGW("suspendOutput() could not get AudioFlinger");
541        return PERMISSION_DENIED;
542    }
543
544    return af->suspendOutput(output);
545}
546
547status_t AudioPolicyService::restoreOutput(audio_io_handle_t output)
548{
549    sp<IAudioFlinger> af = AudioSystem::get_audio_flinger();
550    if (af == 0) {
551        LOGW("restoreOutput() could not get AudioFlinger");
552        return PERMISSION_DENIED;
553    }
554
555    return af->restoreOutput(output);
556}
557
558audio_io_handle_t AudioPolicyService::openInput(uint32_t *pDevices,
559                                uint32_t *pSamplingRate,
560                                uint32_t *pFormat,
561                                uint32_t *pChannels,
562                                uint32_t acoustics)
563{
564    sp<IAudioFlinger> af = AudioSystem::get_audio_flinger();
565    if (af == 0) {
566        LOGW("openInput() could not get AudioFlinger");
567        return 0;
568    }
569
570    return af->openInput(pDevices, pSamplingRate, (uint32_t *)pFormat, pChannels, acoustics);
571}
572
573status_t AudioPolicyService::closeInput(audio_io_handle_t input)
574{
575    sp<IAudioFlinger> af = AudioSystem::get_audio_flinger();
576    if (af == 0) return PERMISSION_DENIED;
577
578    return af->closeInput(input);
579}
580
581status_t AudioPolicyService::setStreamVolume(AudioSystem::stream_type stream,
582                                             float volume,
583                                             audio_io_handle_t output,
584                                             int delayMs)
585{
586    return mAudioCommandThread->volumeCommand((int)stream, volume, (int)output, delayMs);
587}
588
589status_t AudioPolicyService::setStreamOutput(AudioSystem::stream_type stream,
590                                             audio_io_handle_t output)
591{
592    sp<IAudioFlinger> af = AudioSystem::get_audio_flinger();
593    if (af == 0) return PERMISSION_DENIED;
594
595    return af->setStreamOutput(stream, output);
596}
597
598status_t AudioPolicyService::moveEffects(int session, audio_io_handle_t srcOutput,
599                                               audio_io_handle_t dstOutput)
600{
601    sp<IAudioFlinger> af = AudioSystem::get_audio_flinger();
602    if (af == 0) return PERMISSION_DENIED;
603
604    return af->moveEffects(session, (int)srcOutput, (int)dstOutput);
605}
606
607void AudioPolicyService::setParameters(audio_io_handle_t ioHandle,
608                                       const String8& keyValuePairs,
609                                       int delayMs)
610{
611    mAudioCommandThread->parametersCommand((int)ioHandle, keyValuePairs, delayMs);
612}
613
614String8 AudioPolicyService::getParameters(audio_io_handle_t ioHandle, const String8& keys)
615{
616    String8 result = AudioSystem::getParameters(ioHandle, keys);
617    return result;
618}
619
620status_t AudioPolicyService::startTone(ToneGenerator::tone_type tone,
621                                       AudioSystem::stream_type stream)
622{
623    mTonePlaybackThread->startToneCommand(tone, stream);
624    return NO_ERROR;
625}
626
627status_t AudioPolicyService::stopTone()
628{
629    mTonePlaybackThread->stopToneCommand();
630    return NO_ERROR;
631}
632
633status_t AudioPolicyService::setVoiceVolume(float volume, int delayMs)
634{
635    return mAudioCommandThread->voiceVolumeCommand(volume, delayMs);
636}
637
638// -----------  AudioPolicyService::AudioCommandThread implementation ----------
639
640AudioPolicyService::AudioCommandThread::AudioCommandThread(String8 name)
641    : Thread(false), mName(name)
642{
643    mpToneGenerator = NULL;
644}
645
646
647AudioPolicyService::AudioCommandThread::~AudioCommandThread()
648{
649    if (mName != "" && !mAudioCommands.isEmpty()) {
650        release_wake_lock(mName.string());
651    }
652    mAudioCommands.clear();
653    if (mpToneGenerator != NULL) delete mpToneGenerator;
654}
655
656void AudioPolicyService::AudioCommandThread::onFirstRef()
657{
658    if (mName != "") {
659        run(mName.string(), ANDROID_PRIORITY_AUDIO);
660    } else {
661        run("AudioCommandThread", ANDROID_PRIORITY_AUDIO);
662    }
663}
664
665bool AudioPolicyService::AudioCommandThread::threadLoop()
666{
667    nsecs_t waitTime = INT64_MAX;
668
669    mLock.lock();
670    while (!exitPending())
671    {
672        while(!mAudioCommands.isEmpty()) {
673            nsecs_t curTime = systemTime();
674            // commands are sorted by increasing time stamp: execute them from index 0 and up
675            if (mAudioCommands[0]->mTime <= curTime) {
676                AudioCommand *command = mAudioCommands[0];
677                mAudioCommands.removeAt(0);
678                mLastCommand = *command;
679
680                switch (command->mCommand) {
681                case START_TONE: {
682                    mLock.unlock();
683                    ToneData *data = (ToneData *)command->mParam;
684                    LOGV("AudioCommandThread() processing start tone %d on stream %d",
685                            data->mType, data->mStream);
686                    if (mpToneGenerator != NULL)
687                        delete mpToneGenerator;
688                    mpToneGenerator = new ToneGenerator(data->mStream, 1.0);
689                    mpToneGenerator->startTone(data->mType);
690                    delete data;
691                    mLock.lock();
692                    }break;
693                case STOP_TONE: {
694                    mLock.unlock();
695                    LOGV("AudioCommandThread() processing stop tone");
696                    if (mpToneGenerator != NULL) {
697                        mpToneGenerator->stopTone();
698                        delete mpToneGenerator;
699                        mpToneGenerator = NULL;
700                    }
701                    mLock.lock();
702                    }break;
703                case SET_VOLUME: {
704                    VolumeData *data = (VolumeData *)command->mParam;
705                    LOGV("AudioCommandThread() processing set volume stream %d, \
706                            volume %f, output %d", data->mStream, data->mVolume, data->mIO);
707                    command->mStatus = AudioSystem::setStreamVolume(data->mStream,
708                                                                    data->mVolume,
709                                                                    data->mIO);
710                    if (command->mWaitStatus) {
711                        command->mCond.signal();
712                        mWaitWorkCV.wait(mLock);
713                    }
714                    delete data;
715                    }break;
716                case SET_PARAMETERS: {
717                     ParametersData *data = (ParametersData *)command->mParam;
718                     LOGV("AudioCommandThread() processing set parameters string %s, io %d",
719                             data->mKeyValuePairs.string(), data->mIO);
720                     command->mStatus = AudioSystem::setParameters(data->mIO, data->mKeyValuePairs);
721                     if (command->mWaitStatus) {
722                         command->mCond.signal();
723                         mWaitWorkCV.wait(mLock);
724                     }
725                     delete data;
726                     }break;
727                case SET_VOICE_VOLUME: {
728                    VoiceVolumeData *data = (VoiceVolumeData *)command->mParam;
729                    LOGV("AudioCommandThread() processing set voice volume volume %f",
730                            data->mVolume);
731                    command->mStatus = AudioSystem::setVoiceVolume(data->mVolume);
732                    if (command->mWaitStatus) {
733                        command->mCond.signal();
734                        mWaitWorkCV.wait(mLock);
735                    }
736                    delete data;
737                    }break;
738                default:
739                    LOGW("AudioCommandThread() unknown command %d", command->mCommand);
740                }
741                delete command;
742                waitTime = INT64_MAX;
743            } else {
744                waitTime = mAudioCommands[0]->mTime - curTime;
745                break;
746            }
747        }
748        // release delayed commands wake lock
749        if (mName != "" && mAudioCommands.isEmpty()) {
750            release_wake_lock(mName.string());
751        }
752        LOGV("AudioCommandThread() going to sleep");
753        mWaitWorkCV.waitRelative(mLock, waitTime);
754        LOGV("AudioCommandThread() waking up");
755    }
756    mLock.unlock();
757    return false;
758}
759
760status_t AudioPolicyService::AudioCommandThread::dump(int fd)
761{
762    const size_t SIZE = 256;
763    char buffer[SIZE];
764    String8 result;
765
766    snprintf(buffer, SIZE, "AudioCommandThread %p Dump\n", this);
767    result.append(buffer);
768    write(fd, result.string(), result.size());
769
770    bool locked = tryLock(mLock);
771    if (!locked) {
772        String8 result2(kCmdDeadlockedString);
773        write(fd, result2.string(), result2.size());
774    }
775
776    snprintf(buffer, SIZE, "- Commands:\n");
777    result = String8(buffer);
778    result.append("   Command Time        Wait pParam\n");
779    for (int i = 0; i < (int)mAudioCommands.size(); i++) {
780        mAudioCommands[i]->dump(buffer, SIZE);
781        result.append(buffer);
782    }
783    result.append("  Last Command\n");
784    mLastCommand.dump(buffer, SIZE);
785    result.append(buffer);
786
787    write(fd, result.string(), result.size());
788
789    if (locked) mLock.unlock();
790
791    return NO_ERROR;
792}
793
794void AudioPolicyService::AudioCommandThread::startToneCommand(int type, int stream)
795{
796    AudioCommand *command = new AudioCommand();
797    command->mCommand = START_TONE;
798    ToneData *data = new ToneData();
799    data->mType = type;
800    data->mStream = stream;
801    command->mParam = (void *)data;
802    command->mWaitStatus = false;
803    Mutex::Autolock _l(mLock);
804    insertCommand_l(command);
805    LOGV("AudioCommandThread() adding tone start type %d, stream %d", type, stream);
806    mWaitWorkCV.signal();
807}
808
809void AudioPolicyService::AudioCommandThread::stopToneCommand()
810{
811    AudioCommand *command = new AudioCommand();
812    command->mCommand = STOP_TONE;
813    command->mParam = NULL;
814    command->mWaitStatus = false;
815    Mutex::Autolock _l(mLock);
816    insertCommand_l(command);
817    LOGV("AudioCommandThread() adding tone stop");
818    mWaitWorkCV.signal();
819}
820
821status_t AudioPolicyService::AudioCommandThread::volumeCommand(int stream,
822                                                               float volume,
823                                                               int output,
824                                                               int delayMs)
825{
826    status_t status = NO_ERROR;
827
828    AudioCommand *command = new AudioCommand();
829    command->mCommand = SET_VOLUME;
830    VolumeData *data = new VolumeData();
831    data->mStream = stream;
832    data->mVolume = volume;
833    data->mIO = output;
834    command->mParam = data;
835    if (delayMs == 0) {
836        command->mWaitStatus = true;
837    } else {
838        command->mWaitStatus = false;
839    }
840    Mutex::Autolock _l(mLock);
841    insertCommand_l(command, delayMs);
842    LOGV("AudioCommandThread() adding set volume stream %d, volume %f, output %d",
843            stream, volume, output);
844    mWaitWorkCV.signal();
845    if (command->mWaitStatus) {
846        command->mCond.wait(mLock);
847        status =  command->mStatus;
848        mWaitWorkCV.signal();
849    }
850    return status;
851}
852
853status_t AudioPolicyService::AudioCommandThread::parametersCommand(int ioHandle,
854                                                                   const String8& keyValuePairs,
855                                                                   int delayMs)
856{
857    status_t status = NO_ERROR;
858
859    AudioCommand *command = new AudioCommand();
860    command->mCommand = SET_PARAMETERS;
861    ParametersData *data = new ParametersData();
862    data->mIO = ioHandle;
863    data->mKeyValuePairs = keyValuePairs;
864    command->mParam = data;
865    if (delayMs == 0) {
866        command->mWaitStatus = true;
867    } else {
868        command->mWaitStatus = false;
869    }
870    Mutex::Autolock _l(mLock);
871    insertCommand_l(command, delayMs);
872    LOGV("AudioCommandThread() adding set parameter string %s, io %d ,delay %d",
873            keyValuePairs.string(), ioHandle, delayMs);
874    mWaitWorkCV.signal();
875    if (command->mWaitStatus) {
876        command->mCond.wait(mLock);
877        status =  command->mStatus;
878        mWaitWorkCV.signal();
879    }
880    return status;
881}
882
883status_t AudioPolicyService::AudioCommandThread::voiceVolumeCommand(float volume, int delayMs)
884{
885    status_t status = NO_ERROR;
886
887    AudioCommand *command = new AudioCommand();
888    command->mCommand = SET_VOICE_VOLUME;
889    VoiceVolumeData *data = new VoiceVolumeData();
890    data->mVolume = volume;
891    command->mParam = data;
892    if (delayMs == 0) {
893        command->mWaitStatus = true;
894    } else {
895        command->mWaitStatus = false;
896    }
897    Mutex::Autolock _l(mLock);
898    insertCommand_l(command, delayMs);
899    LOGV("AudioCommandThread() adding set voice volume volume %f", volume);
900    mWaitWorkCV.signal();
901    if (command->mWaitStatus) {
902        command->mCond.wait(mLock);
903        status =  command->mStatus;
904        mWaitWorkCV.signal();
905    }
906    return status;
907}
908
909// insertCommand_l() must be called with mLock held
910void AudioPolicyService::AudioCommandThread::insertCommand_l(AudioCommand *command, int delayMs)
911{
912    ssize_t i;
913    Vector <AudioCommand *> removedCommands;
914
915    command->mTime = systemTime() + milliseconds(delayMs);
916
917    // acquire wake lock to make sure delayed commands are processed
918    if (mName != "" && mAudioCommands.isEmpty()) {
919        acquire_wake_lock(PARTIAL_WAKE_LOCK, mName.string());
920    }
921
922    // check same pending commands with later time stamps and eliminate them
923    for (i = mAudioCommands.size()-1; i >= 0; i--) {
924        AudioCommand *command2 = mAudioCommands[i];
925        // commands are sorted by increasing time stamp: no need to scan the rest of mAudioCommands
926        if (command2->mTime <= command->mTime) break;
927        if (command2->mCommand != command->mCommand) continue;
928
929        switch (command->mCommand) {
930        case SET_PARAMETERS: {
931            ParametersData *data = (ParametersData *)command->mParam;
932            ParametersData *data2 = (ParametersData *)command2->mParam;
933            if (data->mIO != data2->mIO) break;
934            LOGV("Comparing parameter command %s to new command %s",
935                    data2->mKeyValuePairs.string(), data->mKeyValuePairs.string());
936            AudioParameter param = AudioParameter(data->mKeyValuePairs);
937            AudioParameter param2 = AudioParameter(data2->mKeyValuePairs);
938            for (size_t j = 0; j < param.size(); j++) {
939               String8 key;
940               String8 value;
941               param.getAt(j, key, value);
942               for (size_t k = 0; k < param2.size(); k++) {
943                  String8 key2;
944                  String8 value2;
945                  param2.getAt(k, key2, value2);
946                  if (key2 == key) {
947                      param2.remove(key2);
948                      LOGV("Filtering out parameter %s", key2.string());
949                      break;
950                  }
951               }
952            }
953            // if all keys have been filtered out, remove the command.
954            // otherwise, update the key value pairs
955            if (param2.size() == 0) {
956                removedCommands.add(command2);
957            } else {
958                data2->mKeyValuePairs = param2.toString();
959            }
960        } break;
961
962        case SET_VOLUME: {
963            VolumeData *data = (VolumeData *)command->mParam;
964            VolumeData *data2 = (VolumeData *)command2->mParam;
965            if (data->mIO != data2->mIO) break;
966            if (data->mStream != data2->mStream) break;
967            LOGV("Filtering out volume command on output %d for stream %d",
968                    data->mIO, data->mStream);
969            removedCommands.add(command2);
970        } break;
971        case START_TONE:
972        case STOP_TONE:
973        default:
974            break;
975        }
976    }
977
978    // remove filtered commands
979    for (size_t j = 0; j < removedCommands.size(); j++) {
980        // removed commands always have time stamps greater than current command
981        for (size_t k = i + 1; k < mAudioCommands.size(); k++) {
982            if (mAudioCommands[k] == removedCommands[j]) {
983                LOGV("suppressing command: %d", mAudioCommands[k]->mCommand);
984                mAudioCommands.removeAt(k);
985                break;
986            }
987        }
988    }
989    removedCommands.clear();
990
991    // insert command at the right place according to its time stamp
992    LOGV("inserting command: %d at index %d, num commands %d",
993            command->mCommand, (int)i+1, mAudioCommands.size());
994    mAudioCommands.insertAt(command, i + 1);
995}
996
997void AudioPolicyService::AudioCommandThread::exit()
998{
999    LOGV("AudioCommandThread::exit");
1000    {
1001        AutoMutex _l(mLock);
1002        requestExit();
1003        mWaitWorkCV.signal();
1004    }
1005    requestExitAndWait();
1006}
1007
1008void AudioPolicyService::AudioCommandThread::AudioCommand::dump(char* buffer, size_t size)
1009{
1010    snprintf(buffer, size, "   %02d      %06d.%03d  %01u    %p\n",
1011            mCommand,
1012            (int)ns2s(mTime),
1013            (int)ns2ms(mTime)%1000,
1014            mWaitStatus,
1015            mParam);
1016}
1017
1018}; // namespace android
1019