AudioPolicyService.cpp revision 0ede8924b98c2967be2795e8d4f9837d8d3f094c 
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#include "Configuration.h"
21#undef __STRICT_ANSI__
22#define __STDINT_LIMITS
23#define __STDC_LIMIT_MACROS
24#include <stdint.h>
25
26#include <sys/time.h>
27#include <binder/IServiceManager.h>
28#include <utils/Log.h>
29#include <cutils/properties.h>
30#include <binder/IPCThreadState.h>
31#include <utils/String16.h>
32#include <utils/threads.h>
33#include "AudioPolicyService.h"
34#include "ServiceUtilities.h"
35#include <hardware_legacy/power.h>
36#include <media/AudioEffect.h>
37#include <media/EffectsFactoryApi.h>
38
39#include <hardware/hardware.h>
40#include <system/audio.h>
41#include <system/audio_policy.h>
42#include <hardware/audio_policy.h>
43#include <audio_effects/audio_effects_conf.h>
44#include <media/AudioParameter.h>
45
46namespace android {
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 kDumpLockSleepUs = 20000;
53
54static const nsecs_t kAudioCommandTimeoutNs = seconds(3); // 3 seconds
55
56namespace {
57    extern struct audio_policy_service_ops aps_ops;
58};
59
60// ----------------------------------------------------------------------------
61
62AudioPolicyService::AudioPolicyService()
63    : BnAudioPolicyService(), mpAudioPolicyDev(NULL), mpAudioPolicy(NULL),
64      mAudioPolicyManager(NULL), mAudioPolicyClient(NULL)
65{
66    char value[PROPERTY_VALUE_MAX];
67    const struct hw_module_t *module;
68    int forced_val;
69    int rc;
70
71    Mutex::Autolock _l(mLock);
72
73    // start tone playback thread
74    mTonePlaybackThread = new AudioCommandThread(String8("ApmTone"), this);
75    // start audio commands thread
76    mAudioCommandThread = new AudioCommandThread(String8("ApmAudio"), this);
77    // start output activity command thread
78    mOutputCommandThread = new AudioCommandThread(String8("ApmOutput"), this);
79
80#ifdef USE_LEGACY_AUDIO_POLICY
81    ALOGI("AudioPolicyService CSTOR in legacy mode");
82
83    /* instantiate the audio policy manager */
84    rc = hw_get_module(AUDIO_POLICY_HARDWARE_MODULE_ID, &module);
85    if (rc) {
86        return;
87    }
88    rc = audio_policy_dev_open(module, &mpAudioPolicyDev);
89    ALOGE_IF(rc, "couldn't open audio policy device (%s)", strerror(-rc));
90    if (rc) {
91        return;
92    }
93
94    rc = mpAudioPolicyDev->create_audio_policy(mpAudioPolicyDev, &aps_ops, this,
95                                               &mpAudioPolicy);
96    ALOGE_IF(rc, "couldn't create audio policy (%s)", strerror(-rc));
97    if (rc) {
98        return;
99    }
100
101    rc = mpAudioPolicy->init_check(mpAudioPolicy);
102    ALOGE_IF(rc, "couldn't init_check the audio policy (%s)", strerror(-rc));
103    if (rc) {
104        return;
105    }
106    ALOGI("Loaded audio policy from %s (%s)", module->name, module->id);
107#else
108    ALOGI("AudioPolicyService CSTOR in new mode");
109
110    mAudioPolicyClient = new AudioPolicyClient(this);
111    mAudioPolicyManager = new AudioPolicyManager(mAudioPolicyClient);
112#endif
113
114    // load audio pre processing modules
115    if (access(AUDIO_EFFECT_VENDOR_CONFIG_FILE, R_OK) == 0) {
116        loadPreProcessorConfig(AUDIO_EFFECT_VENDOR_CONFIG_FILE);
117    } else if (access(AUDIO_EFFECT_DEFAULT_CONFIG_FILE, R_OK) == 0) {
118        loadPreProcessorConfig(AUDIO_EFFECT_DEFAULT_CONFIG_FILE);
119    }
120}
121
122AudioPolicyService::~AudioPolicyService()
123{
124    mTonePlaybackThread->exit();
125    mAudioCommandThread->exit();
126    mOutputCommandThread->exit();
127
128    // release audio pre processing resources
129    for (size_t i = 0; i < mInputSources.size(); i++) {
130        delete mInputSources.valueAt(i);
131    }
132    mInputSources.clear();
133
134    for (size_t i = 0; i < mInputs.size(); i++) {
135        mInputs.valueAt(i)->mEffects.clear();
136        delete mInputs.valueAt(i);
137    }
138    mInputs.clear();
139
140#ifdef USE_LEGACY_AUDIO_POLICY
141    if (mpAudioPolicy != NULL && mpAudioPolicyDev != NULL) {
142        mpAudioPolicyDev->destroy_audio_policy(mpAudioPolicyDev, mpAudioPolicy);
143    }
144    if (mpAudioPolicyDev != NULL) {
145        audio_policy_dev_close(mpAudioPolicyDev);
146    }
147#else
148    delete mAudioPolicyManager;
149    delete mAudioPolicyClient;
150#endif
151}
152
153
154void AudioPolicyService::binderDied(const wp<IBinder>& who) {
155    ALOGW("binderDied() %p, calling pid %d", who.unsafe_get(),
156            IPCThreadState::self()->getCallingPid());
157}
158
159static bool tryLock(Mutex& mutex)
160{
161    bool locked = false;
162    for (int i = 0; i < kDumpLockRetries; ++i) {
163        if (mutex.tryLock() == NO_ERROR) {
164            locked = true;
165            break;
166        }
167        usleep(kDumpLockSleepUs);
168    }
169    return locked;
170}
171
172status_t AudioPolicyService::dumpInternals(int fd)
173{
174    const size_t SIZE = 256;
175    char buffer[SIZE];
176    String8 result;
177
178#ifdef USE_LEGACY_AUDIO_POLICY
179    snprintf(buffer, SIZE, "PolicyManager Interface: %p\n", mpAudioPolicy);
180#else
181    snprintf(buffer, SIZE, "AudioPolicyManager: %p\n", mAudioPolicyManager);
182#endif
183    result.append(buffer);
184    snprintf(buffer, SIZE, "Command Thread: %p\n", mAudioCommandThread.get());
185    result.append(buffer);
186    snprintf(buffer, SIZE, "Tones Thread: %p\n", mTonePlaybackThread.get());
187    result.append(buffer);
188
189    write(fd, result.string(), result.size());
190    return NO_ERROR;
191}
192
193status_t AudioPolicyService::dump(int fd, const Vector<String16>& args __unused)
194{
195    if (!dumpAllowed()) {
196        dumpPermissionDenial(fd);
197    } else {
198        bool locked = tryLock(mLock);
199        if (!locked) {
200            String8 result(kDeadlockedString);
201            write(fd, result.string(), result.size());
202        }
203
204        dumpInternals(fd);
205        if (mAudioCommandThread != 0) {
206            mAudioCommandThread->dump(fd);
207        }
208        if (mTonePlaybackThread != 0) {
209            mTonePlaybackThread->dump(fd);
210        }
211
212#ifdef USE_LEGACY_AUDIO_POLICY
213        if (mpAudioPolicy) {
214            mpAudioPolicy->dump(mpAudioPolicy, fd);
215        }
216#else
217        if (mAudioPolicyManager) {
218            mAudioPolicyManager->dump(fd);
219        }
220#endif
221
222        if (locked) mLock.unlock();
223    }
224    return NO_ERROR;
225}
226
227status_t AudioPolicyService::dumpPermissionDenial(int fd)
228{
229    const size_t SIZE = 256;
230    char buffer[SIZE];
231    String8 result;
232    snprintf(buffer, SIZE, "Permission Denial: "
233            "can't dump AudioPolicyService from pid=%d, uid=%d\n",
234            IPCThreadState::self()->getCallingPid(),
235            IPCThreadState::self()->getCallingUid());
236    result.append(buffer);
237    write(fd, result.string(), result.size());
238    return NO_ERROR;
239}
240
241void AudioPolicyService::setPreProcessorEnabled(const InputDesc *inputDesc, bool enabled)
242{
243    const Vector<sp<AudioEffect> > &fxVector = inputDesc->mEffects;
244    for (size_t i = 0; i < fxVector.size(); i++) {
245        fxVector.itemAt(i)->setEnabled(enabled);
246    }
247}
248
249status_t AudioPolicyService::onTransact(
250        uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
251{
252    return BnAudioPolicyService::onTransact(code, data, reply, flags);
253}
254
255
256// -----------  AudioPolicyService::AudioCommandThread implementation ----------
257
258AudioPolicyService::AudioCommandThread::AudioCommandThread(String8 name,
259                                                           const wp<AudioPolicyService>& service)
260    : Thread(false), mName(name), mService(service)
261{
262    mpToneGenerator = NULL;
263}
264
265
266AudioPolicyService::AudioCommandThread::~AudioCommandThread()
267{
268    if (!mAudioCommands.isEmpty()) {
269        release_wake_lock(mName.string());
270    }
271    mAudioCommands.clear();
272    delete mpToneGenerator;
273}
274
275void AudioPolicyService::AudioCommandThread::onFirstRef()
276{
277    run(mName.string(), ANDROID_PRIORITY_AUDIO);
278}
279
280bool AudioPolicyService::AudioCommandThread::threadLoop()
281{
282    nsecs_t waitTime = INT64_MAX;
283
284    mLock.lock();
285    while (!exitPending())
286    {
287        while (!mAudioCommands.isEmpty()) {
288            nsecs_t curTime = systemTime();
289            // commands are sorted by increasing time stamp: execute them from index 0 and up
290            if (mAudioCommands[0]->mTime <= curTime) {
291                sp<AudioCommand> command = mAudioCommands[0];
292                mAudioCommands.removeAt(0);
293                mLastCommand = command;
294
295                switch (command->mCommand) {
296                case START_TONE: {
297                    mLock.unlock();
298                    ToneData *data = (ToneData *)command->mParam.get();
299                    ALOGV("AudioCommandThread() processing start tone %d on stream %d",
300                            data->mType, data->mStream);
301                    delete mpToneGenerator;
302                    mpToneGenerator = new ToneGenerator(data->mStream, 1.0);
303                    mpToneGenerator->startTone(data->mType);
304                    mLock.lock();
305                    }break;
306                case STOP_TONE: {
307                    mLock.unlock();
308                    ALOGV("AudioCommandThread() processing stop tone");
309                    if (mpToneGenerator != NULL) {
310                        mpToneGenerator->stopTone();
311                        delete mpToneGenerator;
312                        mpToneGenerator = NULL;
313                    }
314                    mLock.lock();
315                    }break;
316                case SET_VOLUME: {
317                    VolumeData *data = (VolumeData *)command->mParam.get();
318                    ALOGV("AudioCommandThread() processing set volume stream %d, \
319                            volume %f, output %d", data->mStream, data->mVolume, data->mIO);
320                    command->mStatus = AudioSystem::setStreamVolume(data->mStream,
321                                                                    data->mVolume,
322                                                                    data->mIO);
323                    }break;
324                case SET_PARAMETERS: {
325                    ParametersData *data = (ParametersData *)command->mParam.get();
326                    ALOGV("AudioCommandThread() processing set parameters string %s, io %d",
327                            data->mKeyValuePairs.string(), data->mIO);
328                    command->mStatus = AudioSystem::setParameters(data->mIO, data->mKeyValuePairs);
329                    }break;
330                case SET_VOICE_VOLUME: {
331                    VoiceVolumeData *data = (VoiceVolumeData *)command->mParam.get();
332                    ALOGV("AudioCommandThread() processing set voice volume volume %f",
333                            data->mVolume);
334                    command->mStatus = AudioSystem::setVoiceVolume(data->mVolume);
335                    }break;
336                case STOP_OUTPUT: {
337                    StopOutputData *data = (StopOutputData *)command->mParam.get();
338                    ALOGV("AudioCommandThread() processing stop output %d",
339                            data->mIO);
340                    sp<AudioPolicyService> svc = mService.promote();
341                    if (svc == 0) {
342                        break;
343                    }
344                    mLock.unlock();
345                    svc->doStopOutput(data->mIO, data->mStream, data->mSession);
346                    mLock.lock();
347                    }break;
348                case RELEASE_OUTPUT: {
349                    ReleaseOutputData *data = (ReleaseOutputData *)command->mParam.get();
350                    ALOGV("AudioCommandThread() processing release output %d",
351                            data->mIO);
352                    sp<AudioPolicyService> svc = mService.promote();
353                    if (svc == 0) {
354                        break;
355                    }
356                    mLock.unlock();
357                    svc->doReleaseOutput(data->mIO);
358                    mLock.lock();
359                    }break;
360                default:
361                    ALOGW("AudioCommandThread() unknown command %d", command->mCommand);
362                }
363                {
364                    Mutex::Autolock _l(command->mLock);
365                    if (command->mWaitStatus) {
366                        command->mWaitStatus = false;
367                        command->mCond.signal();
368                    }
369                }
370                waitTime = INT64_MAX;
371            } else {
372                waitTime = mAudioCommands[0]->mTime - curTime;
373                break;
374            }
375        }
376        // release delayed commands wake lock
377        if (mAudioCommands.isEmpty()) {
378            release_wake_lock(mName.string());
379        }
380        ALOGV("AudioCommandThread() going to sleep");
381        mWaitWorkCV.waitRelative(mLock, waitTime);
382        ALOGV("AudioCommandThread() waking up");
383    }
384    mLock.unlock();
385    return false;
386}
387
388status_t AudioPolicyService::AudioCommandThread::dump(int fd)
389{
390    const size_t SIZE = 256;
391    char buffer[SIZE];
392    String8 result;
393
394    snprintf(buffer, SIZE, "AudioCommandThread %p Dump\n", this);
395    result.append(buffer);
396    write(fd, result.string(), result.size());
397
398    bool locked = tryLock(mLock);
399    if (!locked) {
400        String8 result2(kCmdDeadlockedString);
401        write(fd, result2.string(), result2.size());
402    }
403
404    snprintf(buffer, SIZE, "- Commands:\n");
405    result = String8(buffer);
406    result.append("   Command Time        Wait pParam\n");
407    for (size_t i = 0; i < mAudioCommands.size(); i++) {
408        mAudioCommands[i]->dump(buffer, SIZE);
409        result.append(buffer);
410    }
411    result.append("  Last Command\n");
412    if (mLastCommand != 0) {
413        mLastCommand->dump(buffer, SIZE);
414        result.append(buffer);
415    } else {
416        result.append("     none\n");
417    }
418
419    write(fd, result.string(), result.size());
420
421    if (locked) mLock.unlock();
422
423    return NO_ERROR;
424}
425
426void AudioPolicyService::AudioCommandThread::startToneCommand(ToneGenerator::tone_type type,
427        audio_stream_type_t stream)
428{
429    sp<AudioCommand> command = new AudioCommand();
430    command->mCommand = START_TONE;
431    sp<ToneData> data = new ToneData();
432    data->mType = type;
433    data->mStream = stream;
434    command->mParam = data;
435    ALOGV("AudioCommandThread() adding tone start type %d, stream %d", type, stream);
436    sendCommand(command);
437}
438
439void AudioPolicyService::AudioCommandThread::stopToneCommand()
440{
441    sp<AudioCommand> command = new AudioCommand();
442    command->mCommand = STOP_TONE;
443    ALOGV("AudioCommandThread() adding tone stop");
444    sendCommand(command);
445}
446
447status_t AudioPolicyService::AudioCommandThread::volumeCommand(audio_stream_type_t stream,
448                                                               float volume,
449                                                               audio_io_handle_t output,
450                                                               int delayMs)
451{
452    sp<AudioCommand> command = new AudioCommand();
453    command->mCommand = SET_VOLUME;
454    sp<VolumeData> data = new VolumeData();
455    data->mStream = stream;
456    data->mVolume = volume;
457    data->mIO = output;
458    command->mParam = data;
459    command->mWaitStatus = true;
460    ALOGV("AudioCommandThread() adding set volume stream %d, volume %f, output %d",
461            stream, volume, output);
462    return sendCommand(command, delayMs);
463}
464
465status_t AudioPolicyService::AudioCommandThread::parametersCommand(audio_io_handle_t ioHandle,
466                                                                   const char *keyValuePairs,
467                                                                   int delayMs)
468{
469    sp<AudioCommand> command = new AudioCommand();
470    command->mCommand = SET_PARAMETERS;
471    sp<ParametersData> data = new ParametersData();
472    data->mIO = ioHandle;
473    data->mKeyValuePairs = String8(keyValuePairs);
474    command->mParam = data;
475    command->mWaitStatus = true;
476    ALOGV("AudioCommandThread() adding set parameter string %s, io %d ,delay %d",
477            keyValuePairs, ioHandle, delayMs);
478    return sendCommand(command, delayMs);
479}
480
481status_t AudioPolicyService::AudioCommandThread::voiceVolumeCommand(float volume, int delayMs)
482{
483    sp<AudioCommand> command = new AudioCommand();
484    command->mCommand = SET_VOICE_VOLUME;
485    sp<VoiceVolumeData> data = new VoiceVolumeData();
486    data->mVolume = volume;
487    command->mParam = data;
488    command->mWaitStatus = true;
489    ALOGV("AudioCommandThread() adding set voice volume volume %f", volume);
490    return sendCommand(command, delayMs);
491}
492
493void AudioPolicyService::AudioCommandThread::stopOutputCommand(audio_io_handle_t output,
494                                                               audio_stream_type_t stream,
495                                                               int session)
496{
497    sp<AudioCommand> command = new AudioCommand();
498    command->mCommand = STOP_OUTPUT;
499    sp<StopOutputData> data = new StopOutputData();
500    data->mIO = output;
501    data->mStream = stream;
502    data->mSession = session;
503    command->mParam = data;
504    ALOGV("AudioCommandThread() adding stop output %d", output);
505    sendCommand(command);
506}
507
508void AudioPolicyService::AudioCommandThread::releaseOutputCommand(audio_io_handle_t output)
509{
510    sp<AudioCommand> command = new AudioCommand();
511    command->mCommand = RELEASE_OUTPUT;
512    sp<ReleaseOutputData> data = new ReleaseOutputData();
513    data->mIO = output;
514    command->mParam = data;
515    ALOGV("AudioCommandThread() adding release output %d", output);
516    sendCommand(command);
517}
518
519status_t AudioPolicyService::AudioCommandThread::sendCommand(sp<AudioCommand>& command, int delayMs)
520{
521    {
522        Mutex::Autolock _l(mLock);
523        insertCommand_l(command, delayMs);
524        mWaitWorkCV.signal();
525    }
526    Mutex::Autolock _l(command->mLock);
527    while (command->mWaitStatus) {
528        nsecs_t timeOutNs = kAudioCommandTimeoutNs + milliseconds(delayMs);
529        if (command->mCond.waitRelative(command->mLock, timeOutNs) != NO_ERROR) {
530            command->mStatus = TIMED_OUT;
531            command->mWaitStatus = false;
532        }
533    }
534    return command->mStatus;
535}
536
537// insertCommand_l() must be called with mLock held
538void AudioPolicyService::AudioCommandThread::insertCommand_l(sp<AudioCommand>& command, int delayMs)
539{
540    ssize_t i;  // not size_t because i will count down to -1
541    Vector < sp<AudioCommand> > removedCommands;
542    command->mTime = systemTime() + milliseconds(delayMs);
543
544    // acquire wake lock to make sure delayed commands are processed
545    if (mAudioCommands.isEmpty()) {
546        acquire_wake_lock(PARTIAL_WAKE_LOCK, mName.string());
547    }
548
549    // check same pending commands with later time stamps and eliminate them
550    for (i = mAudioCommands.size()-1; i >= 0; i--) {
551        sp<AudioCommand> command2 = mAudioCommands[i];
552        // commands are sorted by increasing time stamp: no need to scan the rest of mAudioCommands
553        if (command2->mTime <= command->mTime) break;
554        if (command2->mCommand != command->mCommand) continue;
555
556        switch (command->mCommand) {
557        case SET_PARAMETERS: {
558            ParametersData *data = (ParametersData *)command->mParam.get();
559            ParametersData *data2 = (ParametersData *)command2->mParam.get();
560            if (data->mIO != data2->mIO) break;
561            ALOGV("Comparing parameter command %s to new command %s",
562                    data2->mKeyValuePairs.string(), data->mKeyValuePairs.string());
563            AudioParameter param = AudioParameter(data->mKeyValuePairs);
564            AudioParameter param2 = AudioParameter(data2->mKeyValuePairs);
565            for (size_t j = 0; j < param.size(); j++) {
566                String8 key;
567                String8 value;
568                param.getAt(j, key, value);
569                for (size_t k = 0; k < param2.size(); k++) {
570                    String8 key2;
571                    String8 value2;
572                    param2.getAt(k, key2, value2);
573                    if (key2 == key) {
574                        param2.remove(key2);
575                        ALOGV("Filtering out parameter %s", key2.string());
576                        break;
577                    }
578                }
579            }
580            // if all keys have been filtered out, remove the command.
581            // otherwise, update the key value pairs
582            if (param2.size() == 0) {
583                removedCommands.add(command2);
584            } else {
585                data2->mKeyValuePairs = param2.toString();
586            }
587            command->mTime = command2->mTime;
588            // force delayMs to non 0 so that code below does not request to wait for
589            // command status as the command is now delayed
590            delayMs = 1;
591        } break;
592
593        case SET_VOLUME: {
594            VolumeData *data = (VolumeData *)command->mParam.get();
595            VolumeData *data2 = (VolumeData *)command2->mParam.get();
596            if (data->mIO != data2->mIO) break;
597            if (data->mStream != data2->mStream) break;
598            ALOGV("Filtering out volume command on output %d for stream %d",
599                    data->mIO, data->mStream);
600            removedCommands.add(command2);
601            command->mTime = command2->mTime;
602            // force delayMs to non 0 so that code below does not request to wait for
603            // command status as the command is now delayed
604            delayMs = 1;
605        } break;
606        case START_TONE:
607        case STOP_TONE:
608        default:
609            break;
610        }
611    }
612
613    // remove filtered commands
614    for (size_t j = 0; j < removedCommands.size(); j++) {
615        // removed commands always have time stamps greater than current command
616        for (size_t k = i + 1; k < mAudioCommands.size(); k++) {
617            if (mAudioCommands[k].get() == removedCommands[j].get()) {
618                ALOGV("suppressing command: %d", mAudioCommands[k]->mCommand);
619                mAudioCommands.removeAt(k);
620                break;
621            }
622        }
623    }
624    removedCommands.clear();
625
626    // Disable wait for status if delay is not 0
627    if (delayMs != 0) {
628        command->mWaitStatus = false;
629    }
630
631    // insert command at the right place according to its time stamp
632    ALOGV("inserting command: %d at index %d, num commands %d",
633            command->mCommand, (int)i+1, mAudioCommands.size());
634    mAudioCommands.insertAt(command, i + 1);
635}
636
637void AudioPolicyService::AudioCommandThread::exit()
638{
639    ALOGV("AudioCommandThread::exit");
640    {
641        AutoMutex _l(mLock);
642        requestExit();
643        mWaitWorkCV.signal();
644    }
645    requestExitAndWait();
646}
647
648void AudioPolicyService::AudioCommandThread::AudioCommand::dump(char* buffer, size_t size)
649{
650    snprintf(buffer, size, "   %02d      %06d.%03d  %01u    %p\n",
651            mCommand,
652            (int)ns2s(mTime),
653            (int)ns2ms(mTime)%1000,
654            mWaitStatus,
655            mParam.get());
656}
657
658/******* helpers for the service_ops callbacks defined below *********/
659void AudioPolicyService::setParameters(audio_io_handle_t ioHandle,
660                                       const char *keyValuePairs,
661                                       int delayMs)
662{
663    mAudioCommandThread->parametersCommand(ioHandle, keyValuePairs,
664                                           delayMs);
665}
666
667int AudioPolicyService::setStreamVolume(audio_stream_type_t stream,
668                                        float volume,
669                                        audio_io_handle_t output,
670                                        int delayMs)
671{
672    return (int)mAudioCommandThread->volumeCommand(stream, volume,
673                                                   output, delayMs);
674}
675
676int AudioPolicyService::startTone(audio_policy_tone_t tone,
677                                  audio_stream_type_t stream)
678{
679    if (tone != AUDIO_POLICY_TONE_IN_CALL_NOTIFICATION) {
680        ALOGE("startTone: illegal tone requested (%d)", tone);
681    }
682    if (stream != AUDIO_STREAM_VOICE_CALL) {
683        ALOGE("startTone: illegal stream (%d) requested for tone %d", stream,
684            tone);
685    }
686    mTonePlaybackThread->startToneCommand(ToneGenerator::TONE_SUP_CALL_WAITING,
687                                          AUDIO_STREAM_VOICE_CALL);
688    return 0;
689}
690
691int AudioPolicyService::stopTone()
692{
693    mTonePlaybackThread->stopToneCommand();
694    return 0;
695}
696
697int AudioPolicyService::setVoiceVolume(float volume, int delayMs)
698{
699    return (int)mAudioCommandThread->voiceVolumeCommand(volume, delayMs);
700}
701
702// ----------------------------------------------------------------------------
703// Audio pre-processing configuration
704// ----------------------------------------------------------------------------
705
706/*static*/ const char * const AudioPolicyService::kInputSourceNames[AUDIO_SOURCE_CNT -1] = {
707    MIC_SRC_TAG,
708    VOICE_UL_SRC_TAG,
709    VOICE_DL_SRC_TAG,
710    VOICE_CALL_SRC_TAG,
711    CAMCORDER_SRC_TAG,
712    VOICE_REC_SRC_TAG,
713    VOICE_COMM_SRC_TAG
714};
715
716// returns the audio_source_t enum corresponding to the input source name or
717// AUDIO_SOURCE_CNT is no match found
718audio_source_t AudioPolicyService::inputSourceNameToEnum(const char *name)
719{
720    int i;
721    for (i = AUDIO_SOURCE_MIC; i < AUDIO_SOURCE_CNT; i++) {
722        if (strcmp(name, kInputSourceNames[i - AUDIO_SOURCE_MIC]) == 0) {
723            ALOGV("inputSourceNameToEnum found source %s %d", name, i);
724            break;
725        }
726    }
727    return (audio_source_t)i;
728}
729
730size_t AudioPolicyService::growParamSize(char *param,
731                                         size_t size,
732                                         size_t *curSize,
733                                         size_t *totSize)
734{
735    // *curSize is at least sizeof(effect_param_t) + 2 * sizeof(int)
736    size_t pos = ((*curSize - 1 ) / size + 1) * size;
737
738    if (pos + size > *totSize) {
739        while (pos + size > *totSize) {
740            *totSize += ((*totSize + 7) / 8) * 4;
741        }
742        param = (char *)realloc(param, *totSize);
743    }
744    *curSize = pos + size;
745    return pos;
746}
747
748size_t AudioPolicyService::readParamValue(cnode *node,
749                                          char *param,
750                                          size_t *curSize,
751                                          size_t *totSize)
752{
753    if (strncmp(node->name, SHORT_TAG, sizeof(SHORT_TAG) + 1) == 0) {
754        size_t pos = growParamSize(param, sizeof(short), curSize, totSize);
755        *(short *)((char *)param + pos) = (short)atoi(node->value);
756        ALOGV("readParamValue() reading short %d", *(short *)((char *)param + pos));
757        return sizeof(short);
758    } else if (strncmp(node->name, INT_TAG, sizeof(INT_TAG) + 1) == 0) {
759        size_t pos = growParamSize(param, sizeof(int), curSize, totSize);
760        *(int *)((char *)param + pos) = atoi(node->value);
761        ALOGV("readParamValue() reading int %d", *(int *)((char *)param + pos));
762        return sizeof(int);
763    } else if (strncmp(node->name, FLOAT_TAG, sizeof(FLOAT_TAG) + 1) == 0) {
764        size_t pos = growParamSize(param, sizeof(float), curSize, totSize);
765        *(float *)((char *)param + pos) = (float)atof(node->value);
766        ALOGV("readParamValue() reading float %f",*(float *)((char *)param + pos));
767        return sizeof(float);
768    } else if (strncmp(node->name, BOOL_TAG, sizeof(BOOL_TAG) + 1) == 0) {
769        size_t pos = growParamSize(param, sizeof(bool), curSize, totSize);
770        if (strncmp(node->value, "false", strlen("false") + 1) == 0) {
771            *(bool *)((char *)param + pos) = false;
772        } else {
773            *(bool *)((char *)param + pos) = true;
774        }
775        ALOGV("readParamValue() reading bool %s",*(bool *)((char *)param + pos) ? "true" : "false");
776        return sizeof(bool);
777    } else if (strncmp(node->name, STRING_TAG, sizeof(STRING_TAG) + 1) == 0) {
778        size_t len = strnlen(node->value, EFFECT_STRING_LEN_MAX);
779        if (*curSize + len + 1 > *totSize) {
780            *totSize = *curSize + len + 1;
781            param = (char *)realloc(param, *totSize);
782        }
783        strncpy(param + *curSize, node->value, len);
784        *curSize += len;
785        param[*curSize] = '\0';
786        ALOGV("readParamValue() reading string %s", param + *curSize - len);
787        return len;
788    }
789    ALOGW("readParamValue() unknown param type %s", node->name);
790    return 0;
791}
792
793effect_param_t *AudioPolicyService::loadEffectParameter(cnode *root)
794{
795    cnode *param;
796    cnode *value;
797    size_t curSize = sizeof(effect_param_t);
798    size_t totSize = sizeof(effect_param_t) + 2 * sizeof(int);
799    effect_param_t *fx_param = (effect_param_t *)malloc(totSize);
800
801    param = config_find(root, PARAM_TAG);
802    value = config_find(root, VALUE_TAG);
803    if (param == NULL && value == NULL) {
804        // try to parse simple parameter form {int int}
805        param = root->first_child;
806        if (param != NULL) {
807            // Note: that a pair of random strings is read as 0 0
808            int *ptr = (int *)fx_param->data;
809            int *ptr2 = (int *)((char *)param + sizeof(effect_param_t));
810            ALOGW("loadEffectParameter() ptr %p ptr2 %p", ptr, ptr2);
811            *ptr++ = atoi(param->name);
812            *ptr = atoi(param->value);
813            fx_param->psize = sizeof(int);
814            fx_param->vsize = sizeof(int);
815            return fx_param;
816        }
817    }
818    if (param == NULL || value == NULL) {
819        ALOGW("loadEffectParameter() invalid parameter description %s", root->name);
820        goto error;
821    }
822
823    fx_param->psize = 0;
824    param = param->first_child;
825    while (param) {
826        ALOGV("loadEffectParameter() reading param of type %s", param->name);
827        size_t size = readParamValue(param, (char *)fx_param, &curSize, &totSize);
828        if (size == 0) {
829            goto error;
830        }
831        fx_param->psize += size;
832        param = param->next;
833    }
834
835    // align start of value field on 32 bit boundary
836    curSize = ((curSize - 1 ) / sizeof(int) + 1) * sizeof(int);
837
838    fx_param->vsize = 0;
839    value = value->first_child;
840    while (value) {
841        ALOGV("loadEffectParameter() reading value of type %s", value->name);
842        size_t size = readParamValue(value, (char *)fx_param, &curSize, &totSize);
843        if (size == 0) {
844            goto error;
845        }
846        fx_param->vsize += size;
847        value = value->next;
848    }
849
850    return fx_param;
851
852error:
853    free(fx_param);
854    return NULL;
855}
856
857void AudioPolicyService::loadEffectParameters(cnode *root, Vector <effect_param_t *>& params)
858{
859    cnode *node = root->first_child;
860    while (node) {
861        ALOGV("loadEffectParameters() loading param %s", node->name);
862        effect_param_t *param = loadEffectParameter(node);
863        if (param == NULL) {
864            node = node->next;
865            continue;
866        }
867        params.add(param);
868        node = node->next;
869    }
870}
871
872AudioPolicyService::InputSourceDesc *AudioPolicyService::loadInputSource(
873                                                            cnode *root,
874                                                            const Vector <EffectDesc *>& effects)
875{
876    cnode *node = root->first_child;
877    if (node == NULL) {
878        ALOGW("loadInputSource() empty element %s", root->name);
879        return NULL;
880    }
881    InputSourceDesc *source = new InputSourceDesc();
882    while (node) {
883        size_t i;
884        for (i = 0; i < effects.size(); i++) {
885            if (strncmp(effects[i]->mName, node->name, EFFECT_STRING_LEN_MAX) == 0) {
886                ALOGV("loadInputSource() found effect %s in list", node->name);
887                break;
888            }
889        }
890        if (i == effects.size()) {
891            ALOGV("loadInputSource() effect %s not in list", node->name);
892            node = node->next;
893            continue;
894        }
895        EffectDesc *effect = new EffectDesc(*effects[i]);   // deep copy
896        loadEffectParameters(node, effect->mParams);
897        ALOGV("loadInputSource() adding effect %s uuid %08x", effect->mName, effect->mUuid.timeLow);
898        source->mEffects.add(effect);
899        node = node->next;
900    }
901    if (source->mEffects.size() == 0) {
902        ALOGW("loadInputSource() no valid effects found in source %s", root->name);
903        delete source;
904        return NULL;
905    }
906    return source;
907}
908
909status_t AudioPolicyService::loadInputSources(cnode *root, const Vector <EffectDesc *>& effects)
910{
911    cnode *node = config_find(root, PREPROCESSING_TAG);
912    if (node == NULL) {
913        return -ENOENT;
914    }
915    node = node->first_child;
916    while (node) {
917        audio_source_t source = inputSourceNameToEnum(node->name);
918        if (source == AUDIO_SOURCE_CNT) {
919            ALOGW("loadInputSources() invalid input source %s", node->name);
920            node = node->next;
921            continue;
922        }
923        ALOGV("loadInputSources() loading input source %s", node->name);
924        InputSourceDesc *desc = loadInputSource(node, effects);
925        if (desc == NULL) {
926            node = node->next;
927            continue;
928        }
929        mInputSources.add(source, desc);
930        node = node->next;
931    }
932    return NO_ERROR;
933}
934
935AudioPolicyService::EffectDesc *AudioPolicyService::loadEffect(cnode *root)
936{
937    cnode *node = config_find(root, UUID_TAG);
938    if (node == NULL) {
939        return NULL;
940    }
941    effect_uuid_t uuid;
942    if (AudioEffect::stringToGuid(node->value, &uuid) != NO_ERROR) {
943        ALOGW("loadEffect() invalid uuid %s", node->value);
944        return NULL;
945    }
946    return new EffectDesc(root->name, uuid);
947}
948
949status_t AudioPolicyService::loadEffects(cnode *root, Vector <EffectDesc *>& effects)
950{
951    cnode *node = config_find(root, EFFECTS_TAG);
952    if (node == NULL) {
953        return -ENOENT;
954    }
955    node = node->first_child;
956    while (node) {
957        ALOGV("loadEffects() loading effect %s", node->name);
958        EffectDesc *effect = loadEffect(node);
959        if (effect == NULL) {
960            node = node->next;
961            continue;
962        }
963        effects.add(effect);
964        node = node->next;
965    }
966    return NO_ERROR;
967}
968
969status_t AudioPolicyService::loadPreProcessorConfig(const char *path)
970{
971    cnode *root;
972    char *data;
973
974    data = (char *)load_file(path, NULL);
975    if (data == NULL) {
976        return -ENODEV;
977    }
978    root = config_node("", "");
979    config_load(root, data);
980
981    Vector <EffectDesc *> effects;
982    loadEffects(root, effects);
983    loadInputSources(root, effects);
984
985    // delete effects to fix memory leak.
986    // as effects is local var and valgrind would treat this as memory leak
987    // and although it only did in mediaserver init, but free it in case mediaserver reboot
988    size_t i;
989    for (i = 0; i < effects.size(); i++) {
990      delete effects[i];
991    }
992
993    config_free(root);
994    free(root);
995    free(data);
996
997    return NO_ERROR;
998}
999
1000extern "C" {
1001audio_module_handle_t aps_load_hw_module(void *service __unused,
1002                                             const char *name);
1003audio_io_handle_t aps_open_output(void *service __unused,
1004                                         audio_devices_t *pDevices,
1005                                         uint32_t *pSamplingRate,
1006                                         audio_format_t *pFormat,
1007                                         audio_channel_mask_t *pChannelMask,
1008                                         uint32_t *pLatencyMs,
1009                                         audio_output_flags_t flags);
1010
1011audio_io_handle_t aps_open_output_on_module(void *service __unused,
1012                                                   audio_module_handle_t module,
1013                                                   audio_devices_t *pDevices,
1014                                                   uint32_t *pSamplingRate,
1015                                                   audio_format_t *pFormat,
1016                                                   audio_channel_mask_t *pChannelMask,
1017                                                   uint32_t *pLatencyMs,
1018                                                   audio_output_flags_t flags,
1019                                                   const audio_offload_info_t *offloadInfo);
1020audio_io_handle_t aps_open_dup_output(void *service __unused,
1021                                                 audio_io_handle_t output1,
1022                                                 audio_io_handle_t output2);
1023int aps_close_output(void *service __unused, audio_io_handle_t output);
1024int aps_suspend_output(void *service __unused, audio_io_handle_t output);
1025int aps_restore_output(void *service __unused, audio_io_handle_t output);
1026audio_io_handle_t aps_open_input(void *service __unused,
1027                                        audio_devices_t *pDevices,
1028                                        uint32_t *pSamplingRate,
1029                                        audio_format_t *pFormat,
1030                                        audio_channel_mask_t *pChannelMask,
1031                                        audio_in_acoustics_t acoustics __unused);
1032audio_io_handle_t aps_open_input_on_module(void *service __unused,
1033                                                  audio_module_handle_t module,
1034                                                  audio_devices_t *pDevices,
1035                                                  uint32_t *pSamplingRate,
1036                                                  audio_format_t *pFormat,
1037                                                  audio_channel_mask_t *pChannelMask);
1038int aps_close_input(void *service __unused, audio_io_handle_t input);
1039int aps_invalidate_stream(void *service __unused, audio_stream_type_t stream);
1040int aps_move_effects(void *service __unused, int session,
1041                                audio_io_handle_t src_output,
1042                                audio_io_handle_t dst_output);
1043char * aps_get_parameters(void *service __unused, audio_io_handle_t io_handle,
1044                                     const char *keys);
1045void aps_set_parameters(void *service, audio_io_handle_t io_handle,
1046                                   const char *kv_pairs, int delay_ms);
1047int aps_set_stream_volume(void *service, audio_stream_type_t stream,
1048                                     float volume, audio_io_handle_t output,
1049                                     int delay_ms);
1050int aps_start_tone(void *service, audio_policy_tone_t tone,
1051                              audio_stream_type_t stream);
1052int aps_stop_tone(void *service);
1053int aps_set_voice_volume(void *service, float volume, int delay_ms);
1054};
1055
1056namespace {
1057    struct audio_policy_service_ops aps_ops = {
1058        .open_output           = aps_open_output,
1059        .open_duplicate_output = aps_open_dup_output,
1060        .close_output          = aps_close_output,
1061        .suspend_output        = aps_suspend_output,
1062        .restore_output        = aps_restore_output,
1063        .open_input            = aps_open_input,
1064        .close_input           = aps_close_input,
1065        .set_stream_volume     = aps_set_stream_volume,
1066        .invalidate_stream     = aps_invalidate_stream,
1067        .set_parameters        = aps_set_parameters,
1068        .get_parameters        = aps_get_parameters,
1069        .start_tone            = aps_start_tone,
1070        .stop_tone             = aps_stop_tone,
1071        .set_voice_volume      = aps_set_voice_volume,
1072        .move_effects          = aps_move_effects,
1073        .load_hw_module        = aps_load_hw_module,
1074        .open_output_on_module = aps_open_output_on_module,
1075        .open_input_on_module  = aps_open_input_on_module,
1076    };
1077}; // namespace <unnamed>
1078
1079}; // namespace android
1080