AudioPolicyService.cpp revision 57dae99c9fcd6becd2b5ed0c53f277ba4d7dbcfc 
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 <cutils/properties.h>
34#include <dlfcn.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
45namespace android {
46
47static const char *kDeadlockedString = "AudioPolicyService may be deadlocked\n";
48static const char *kCmdDeadlockedString = "AudioPolicyService command thread may be deadlocked\n";
49
50static const int kDumpLockRetries = 50;
51static const int kDumpLockSleep = 20000;
52
53static bool checkPermission() {
54    if (getpid() == IPCThreadState::self()->getCallingPid()) return true;
55    bool ok = checkCallingPermission(String16("android.permission.MODIFY_AUDIO_SETTINGS"));
56    if (!ok) LOGE("Request requires android.permission.MODIFY_AUDIO_SETTINGS");
57    return ok;
58}
59
60namespace {
61    extern struct audio_policy_service_ops aps_ops;
62};
63
64// ----------------------------------------------------------------------------
65
66AudioPolicyService::AudioPolicyService()
67    : BnAudioPolicyService() , mpAudioPolicyDev(NULL) , mpAudioPolicy(NULL)
68{
69    char value[PROPERTY_VALUE_MAX];
70    const struct hw_module_t *module;
71    int forced_val;
72    int rc;
73
74    Mutex::Autolock _l(mLock);
75
76    // start tone playback thread
77    mTonePlaybackThread = new AudioCommandThread(String8(""));
78    // start audio commands thread
79    mAudioCommandThread = new AudioCommandThread(String8("ApmCommandThread"));
80
81    /* instantiate the audio policy manager */
82    rc = hw_get_module(AUDIO_POLICY_HARDWARE_MODULE_ID, &module);
83    if (rc)
84        return;
85
86    rc = audio_policy_dev_open(module, &mpAudioPolicyDev);
87    LOGE_IF(rc, "couldn't open audio policy device (%s)", strerror(-rc));
88    if (rc)
89        return;
90
91    rc = mpAudioPolicyDev->create_audio_policy(mpAudioPolicyDev, &aps_ops, this,
92                                               &mpAudioPolicy);
93    LOGE_IF(rc, "couldn't create audio policy (%s)", strerror(-rc));
94    if (rc)
95        return;
96
97    rc = mpAudioPolicy->init_check(mpAudioPolicy);
98    LOGE_IF(rc, "couldn't init_check the audio policy (%s)", strerror(-rc));
99    if (rc)
100        return;
101
102    property_get("ro.camera.sound.forced", value, "0");
103    forced_val = strtol(value, NULL, 0);
104    mpAudioPolicy->set_can_mute_enforced_audible(mpAudioPolicy, !forced_val);
105
106    LOGI("Loaded audio policy from %s (%s)", module->name, module->id);
107
108    // load audio pre processing modules
109    if (access(AUDIO_EFFECT_VENDOR_CONFIG_FILE, R_OK) == 0) {
110        loadPreProcessorConfig(AUDIO_EFFECT_VENDOR_CONFIG_FILE);
111    } else if (access(AUDIO_EFFECT_DEFAULT_CONFIG_FILE, R_OK) == 0) {
112        loadPreProcessorConfig(AUDIO_EFFECT_DEFAULT_CONFIG_FILE);
113    }
114}
115
116AudioPolicyService::~AudioPolicyService()
117{
118    mTonePlaybackThread->exit();
119    mTonePlaybackThread.clear();
120    mAudioCommandThread->exit();
121    mAudioCommandThread.clear();
122
123
124    // release audio pre processing resources
125    for (size_t i = 0; i < mInputSources.size(); i++) {
126        InputSourceDesc *source = mInputSources.valueAt(i);
127        Vector <EffectDesc *> effects = source->mEffects;
128        for (size_t j = 0; j < effects.size(); j++) {
129            delete effects[j]->mName;
130            Vector <effect_param_t *> params = effects[j]->mParams;
131            for (size_t k = 0; k < params.size(); k++) {
132                delete params[k];
133            }
134            params.clear();
135            delete effects[j];
136        }
137        effects.clear();
138        delete source;
139    }
140    mInputSources.clear();
141
142    for (size_t i = 0; i < mInputs.size(); i++) {
143        mInputs.valueAt(i)->mEffects.clear();
144        delete mInputs.valueAt(i);
145    }
146    mInputs.clear();
147
148    if (mpAudioPolicy && mpAudioPolicyDev)
149        mpAudioPolicyDev->destroy_audio_policy(mpAudioPolicyDev, mpAudioPolicy);
150    if (mpAudioPolicyDev)
151        audio_policy_dev_close(mpAudioPolicyDev);
152}
153
154status_t AudioPolicyService::setDeviceConnectionState(audio_devices_t device,
155                                                  audio_policy_dev_state_t state,
156                                                  const char *device_address)
157{
158    if (mpAudioPolicy == NULL) {
159        return NO_INIT;
160    }
161    if (!checkPermission()) {
162        return PERMISSION_DENIED;
163    }
164    if (!audio_is_output_device(device) && !audio_is_input_device(device)) {
165        return BAD_VALUE;
166    }
167    if (state != AUDIO_POLICY_DEVICE_STATE_AVAILABLE &&
168            state != AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE) {
169        return BAD_VALUE;
170    }
171
172    LOGV("setDeviceConnectionState() tid %d", gettid());
173    Mutex::Autolock _l(mLock);
174    return mpAudioPolicy->set_device_connection_state(mpAudioPolicy, device,
175                                                      state, device_address);
176}
177
178audio_policy_dev_state_t AudioPolicyService::getDeviceConnectionState(
179                                                              audio_devices_t device,
180                                                              const char *device_address)
181{
182    if (mpAudioPolicy == NULL) {
183        return AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE;
184    }
185    if (!checkPermission()) {
186        return AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE;
187    }
188    return mpAudioPolicy->get_device_connection_state(mpAudioPolicy, device,
189                                                      device_address);
190}
191
192status_t AudioPolicyService::setPhoneState(int state)
193{
194    if (mpAudioPolicy == NULL) {
195        return NO_INIT;
196    }
197    if (!checkPermission()) {
198        return PERMISSION_DENIED;
199    }
200    if (state < 0 || state >= AUDIO_MODE_CNT) {
201        return BAD_VALUE;
202    }
203
204    LOGV("setPhoneState() tid %d", gettid());
205
206    // TODO: check if it is more appropriate to do it in platform specific policy manager
207    AudioSystem::setMode(state);
208
209    Mutex::Autolock _l(mLock);
210    mpAudioPolicy->set_phone_state(mpAudioPolicy, state);
211    return NO_ERROR;
212}
213
214status_t AudioPolicyService::setRingerMode(uint32_t mode, uint32_t mask)
215{
216    if (mpAudioPolicy == NULL) {
217        return NO_INIT;
218    }
219    if (!checkPermission()) {
220        return PERMISSION_DENIED;
221    }
222
223    mpAudioPolicy->set_ringer_mode(mpAudioPolicy, mode, mask);
224    return NO_ERROR;
225}
226
227status_t AudioPolicyService::setForceUse(audio_policy_force_use_t usage,
228                                         audio_policy_forced_cfg_t config)
229{
230    if (mpAudioPolicy == NULL) {
231        return NO_INIT;
232    }
233    if (!checkPermission()) {
234        return PERMISSION_DENIED;
235    }
236    if (usage < 0 || usage >= AUDIO_POLICY_FORCE_USE_CNT) {
237        return BAD_VALUE;
238    }
239    if (config < 0 || config >= AUDIO_POLICY_FORCE_CFG_CNT) {
240        return BAD_VALUE;
241    }
242    LOGV("setForceUse() tid %d", gettid());
243    Mutex::Autolock _l(mLock);
244    mpAudioPolicy->set_force_use(mpAudioPolicy, usage, config);
245    return NO_ERROR;
246}
247
248audio_policy_forced_cfg_t AudioPolicyService::getForceUse(audio_policy_force_use_t usage)
249{
250    if (mpAudioPolicy == NULL) {
251        return AUDIO_POLICY_FORCE_NONE;
252    }
253    if (!checkPermission()) {
254        return AUDIO_POLICY_FORCE_NONE;
255    }
256    if (usage < 0 || usage >= AUDIO_POLICY_FORCE_USE_CNT) {
257        return AUDIO_POLICY_FORCE_NONE;
258    }
259    return mpAudioPolicy->get_force_use(mpAudioPolicy, usage);
260}
261
262audio_io_handle_t AudioPolicyService::getOutput(audio_stream_type_t stream,
263                                    uint32_t samplingRate,
264                                    uint32_t format,
265                                    uint32_t channels,
266                                    audio_policy_output_flags_t flags)
267{
268    if (mpAudioPolicy == NULL) {
269        return 0;
270    }
271    LOGV("getOutput() tid %d", gettid());
272    Mutex::Autolock _l(mLock);
273    return mpAudioPolicy->get_output(mpAudioPolicy, stream, samplingRate, format, channels, flags);
274}
275
276status_t AudioPolicyService::startOutput(audio_io_handle_t output,
277                                         audio_stream_type_t stream,
278                                         int session)
279{
280    if (mpAudioPolicy == NULL) {
281        return NO_INIT;
282    }
283    LOGV("startOutput() tid %d", gettid());
284    Mutex::Autolock _l(mLock);
285    return mpAudioPolicy->start_output(mpAudioPolicy, output, stream, session);
286}
287
288status_t AudioPolicyService::stopOutput(audio_io_handle_t output,
289                                        audio_stream_type_t stream,
290                                        int session)
291{
292    if (mpAudioPolicy == NULL) {
293        return NO_INIT;
294    }
295    LOGV("stopOutput() tid %d", gettid());
296    Mutex::Autolock _l(mLock);
297    return mpAudioPolicy->stop_output(mpAudioPolicy, output, stream, session);
298}
299
300void AudioPolicyService::releaseOutput(audio_io_handle_t output)
301{
302    if (mpAudioPolicy == NULL) {
303        return;
304    }
305    LOGV("releaseOutput() tid %d", gettid());
306    Mutex::Autolock _l(mLock);
307    mpAudioPolicy->release_output(mpAudioPolicy, output);
308}
309
310audio_io_handle_t AudioPolicyService::getInput(int inputSource,
311                                    uint32_t samplingRate,
312                                    uint32_t format,
313                                    uint32_t channels,
314                                    audio_in_acoustics_t acoustics,
315                                    int audioSession)
316{
317    if (mpAudioPolicy == NULL) {
318        return 0;
319    }
320    Mutex::Autolock _l(mLock);
321    audio_io_handle_t input = mpAudioPolicy->get_input(mpAudioPolicy, inputSource, samplingRate,
322                                                       format, channels, acoustics);
323
324    if (input == 0) {
325        return input;
326    }
327    // create audio pre processors according to input source
328    ssize_t index = mInputSources.indexOfKey((audio_source_t)inputSource);
329    if (index < 0) {
330        return input;
331    }
332    ssize_t idx = mInputs.indexOfKey(input);
333    InputDesc *inputDesc;
334    if (idx < 0) {
335        inputDesc = new InputDesc();
336        inputDesc->mSessionId = audioSession;
337        mInputs.add(input, inputDesc);
338    } else {
339        inputDesc = mInputs.valueAt(idx);
340    }
341
342    Vector <EffectDesc *> effects = mInputSources.valueAt(index)->mEffects;
343    for (size_t i = 0; i < effects.size(); i++) {
344        EffectDesc *effect = effects[i];
345        sp<AudioEffect> fx = new AudioEffect(NULL, &effect->mUuid, -1, 0, 0, audioSession, input);
346        status_t status = fx->initCheck();
347        if (status != NO_ERROR && status != ALREADY_EXISTS) {
348            LOGW("Failed to create Fx %s on input %d", effect->mName, input);
349            // fx goes out of scope and strong ref on AudioEffect is released
350            continue;
351        }
352        for (size_t j = 0; j < effect->mParams.size(); j++) {
353            fx->setParameter(effect->mParams[j]);
354        }
355        inputDesc->mEffects.add(fx);
356    }
357    setPreProcessorEnabled(inputDesc, true);
358    return input;
359}
360
361status_t AudioPolicyService::startInput(audio_io_handle_t input)
362{
363    if (mpAudioPolicy == NULL) {
364        return NO_INIT;
365    }
366    Mutex::Autolock _l(mLock);
367
368    return mpAudioPolicy->start_input(mpAudioPolicy, input);
369}
370
371status_t AudioPolicyService::stopInput(audio_io_handle_t input)
372{
373    if (mpAudioPolicy == NULL) {
374        return NO_INIT;
375    }
376    Mutex::Autolock _l(mLock);
377
378    return mpAudioPolicy->stop_input(mpAudioPolicy, input);
379}
380
381void AudioPolicyService::releaseInput(audio_io_handle_t input)
382{
383    if (mpAudioPolicy == NULL) {
384        return;
385    }
386    Mutex::Autolock _l(mLock);
387    mpAudioPolicy->release_input(mpAudioPolicy, input);
388
389    ssize_t index = mInputs.indexOfKey(input);
390    if (index < 0) {
391        return;
392    }
393    InputDesc *inputDesc = mInputs.valueAt(index);
394    setPreProcessorEnabled(inputDesc, false);
395    inputDesc->mEffects.clear();
396    delete inputDesc;
397    mInputs.removeItemsAt(index);
398}
399
400status_t AudioPolicyService::initStreamVolume(audio_stream_type_t stream,
401                                            int indexMin,
402                                            int indexMax)
403{
404    if (mpAudioPolicy == NULL) {
405        return NO_INIT;
406    }
407    if (!checkPermission()) {
408        return PERMISSION_DENIED;
409    }
410    if (stream < 0 || stream >= AUDIO_STREAM_CNT) {
411        return BAD_VALUE;
412    }
413    mpAudioPolicy->init_stream_volume(mpAudioPolicy, stream, indexMin, indexMax);
414    return NO_ERROR;
415}
416
417status_t AudioPolicyService::setStreamVolumeIndex(audio_stream_type_t stream, int index)
418{
419    if (mpAudioPolicy == NULL) {
420        return NO_INIT;
421    }
422    if (!checkPermission()) {
423        return PERMISSION_DENIED;
424    }
425    if (stream < 0 || stream >= AUDIO_STREAM_CNT) {
426        return BAD_VALUE;
427    }
428
429    return mpAudioPolicy->set_stream_volume_index(mpAudioPolicy, stream, index);
430}
431
432status_t AudioPolicyService::getStreamVolumeIndex(audio_stream_type_t stream, int *index)
433{
434    if (mpAudioPolicy == NULL) {
435        return NO_INIT;
436    }
437    if (!checkPermission()) {
438        return PERMISSION_DENIED;
439    }
440    if (stream < 0 || stream >= AUDIO_STREAM_CNT) {
441        return BAD_VALUE;
442    }
443    return mpAudioPolicy->get_stream_volume_index(mpAudioPolicy, stream, index);
444}
445
446uint32_t AudioPolicyService::getStrategyForStream(audio_stream_type_t stream)
447{
448    if (mpAudioPolicy == NULL) {
449        return 0;
450    }
451    return mpAudioPolicy->get_strategy_for_stream(mpAudioPolicy, stream);
452}
453
454uint32_t AudioPolicyService::getDevicesForStream(audio_stream_type_t stream)
455{
456    if (mpAudioPolicy == NULL) {
457        return 0;
458    }
459    return mpAudioPolicy->get_devices_for_stream(mpAudioPolicy, stream);
460}
461
462audio_io_handle_t AudioPolicyService::getOutputForEffect(effect_descriptor_t *desc)
463{
464    if (mpAudioPolicy == NULL) {
465        return NO_INIT;
466    }
467    Mutex::Autolock _l(mLock);
468    return mpAudioPolicy->get_output_for_effect(mpAudioPolicy, desc);
469}
470
471status_t AudioPolicyService::registerEffect(effect_descriptor_t *desc,
472                                audio_io_handle_t io,
473                                uint32_t strategy,
474                                int session,
475                                int id)
476{
477    if (mpAudioPolicy == NULL) {
478        return NO_INIT;
479    }
480    return mpAudioPolicy->register_effect(mpAudioPolicy, desc, io, strategy, session, id);
481}
482
483status_t AudioPolicyService::unregisterEffect(int id)
484{
485    if (mpAudioPolicy == NULL) {
486        return NO_INIT;
487    }
488    return mpAudioPolicy->unregister_effect(mpAudioPolicy, id);
489}
490
491bool AudioPolicyService::isStreamActive(int stream, uint32_t inPastMs) const
492{
493    if (mpAudioPolicy == NULL) {
494        return 0;
495    }
496    Mutex::Autolock _l(mLock);
497    return mpAudioPolicy->is_stream_active(mpAudioPolicy, stream, inPastMs);
498}
499
500status_t AudioPolicyService::queryDefaultPreProcessing(int audioSession,
501                                                       effect_descriptor_t *descriptors,
502                                                       uint32_t *count)
503{
504
505    if (mpAudioPolicy == NULL) {
506        *count = 0;
507        return NO_INIT;
508    }
509    Mutex::Autolock _l(mLock);
510    status_t status = NO_ERROR;
511
512    size_t index;
513    for (index = 0; index < mInputs.size(); index++) {
514        if (mInputs.valueAt(index)->mSessionId == audioSession) {
515            break;
516        }
517    }
518    if (index == mInputs.size()) {
519        *count = 0;
520        return BAD_VALUE;
521    }
522    Vector< sp<AudioEffect> > effects = mInputs.valueAt(index)->mEffects;
523
524    for (size_t i = 0; i < effects.size(); i++) {
525        effect_descriptor_t desc = effects[i]->descriptor();
526        if (i < *count) {
527            memcpy(descriptors + i, &desc, sizeof(effect_descriptor_t));
528        }
529    }
530    if (effects.size() > *count) {
531        status = NO_MEMORY;
532    }
533    *count = effects.size();
534    return status;
535}
536
537void AudioPolicyService::binderDied(const wp<IBinder>& who) {
538    LOGW("binderDied() %p, tid %d, calling tid %d", who.unsafe_get(), gettid(),
539            IPCThreadState::self()->getCallingPid());
540}
541
542static bool tryLock(Mutex& mutex)
543{
544    bool locked = false;
545    for (int i = 0; i < kDumpLockRetries; ++i) {
546        if (mutex.tryLock() == NO_ERROR) {
547            locked = true;
548            break;
549        }
550        usleep(kDumpLockSleep);
551    }
552    return locked;
553}
554
555status_t AudioPolicyService::dumpInternals(int fd)
556{
557    const size_t SIZE = 256;
558    char buffer[SIZE];
559    String8 result;
560
561    snprintf(buffer, SIZE, "PolicyManager Interface: %p\n", mpAudioPolicy);
562    result.append(buffer);
563    snprintf(buffer, SIZE, "Command Thread: %p\n", mAudioCommandThread.get());
564    result.append(buffer);
565    snprintf(buffer, SIZE, "Tones Thread: %p\n", mTonePlaybackThread.get());
566    result.append(buffer);
567
568    write(fd, result.string(), result.size());
569    return NO_ERROR;
570}
571
572status_t AudioPolicyService::dump(int fd, const Vector<String16>& args)
573{
574    if (checkCallingPermission(String16("android.permission.DUMP")) == false) {
575        dumpPermissionDenial(fd);
576    } else {
577        bool locked = tryLock(mLock);
578        if (!locked) {
579            String8 result(kDeadlockedString);
580            write(fd, result.string(), result.size());
581        }
582
583        dumpInternals(fd);
584        if (mAudioCommandThread != NULL) {
585            mAudioCommandThread->dump(fd);
586        }
587        if (mTonePlaybackThread != NULL) {
588            mTonePlaybackThread->dump(fd);
589        }
590
591        if (mpAudioPolicy) {
592            mpAudioPolicy->dump(mpAudioPolicy, fd);
593        }
594
595        if (locked) mLock.unlock();
596    }
597    return NO_ERROR;
598}
599
600status_t AudioPolicyService::dumpPermissionDenial(int fd)
601{
602    const size_t SIZE = 256;
603    char buffer[SIZE];
604    String8 result;
605    snprintf(buffer, SIZE, "Permission Denial: "
606            "can't dump AudioPolicyService from pid=%d, uid=%d\n",
607            IPCThreadState::self()->getCallingPid(),
608            IPCThreadState::self()->getCallingUid());
609    result.append(buffer);
610    write(fd, result.string(), result.size());
611    return NO_ERROR;
612}
613
614void AudioPolicyService::setPreProcessorEnabled(InputDesc *inputDesc, bool enabled)
615{
616    Vector<sp<AudioEffect> > fxVector = inputDesc->mEffects;
617    for (size_t i = 0; i < fxVector.size(); i++) {
618        sp<AudioEffect> fx = fxVector.itemAt(i);
619        fx->setEnabled(enabled);
620    }
621}
622
623status_t AudioPolicyService::onTransact(
624        uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
625{
626    return BnAudioPolicyService::onTransact(code, data, reply, flags);
627}
628
629
630// -----------  AudioPolicyService::AudioCommandThread implementation ----------
631
632AudioPolicyService::AudioCommandThread::AudioCommandThread(String8 name)
633    : Thread(false), mName(name)
634{
635    mpToneGenerator = NULL;
636}
637
638
639AudioPolicyService::AudioCommandThread::~AudioCommandThread()
640{
641    if (mName != "" && !mAudioCommands.isEmpty()) {
642        release_wake_lock(mName.string());
643    }
644    mAudioCommands.clear();
645    if (mpToneGenerator != NULL) delete mpToneGenerator;
646}
647
648void AudioPolicyService::AudioCommandThread::onFirstRef()
649{
650    if (mName != "") {
651        run(mName.string(), ANDROID_PRIORITY_AUDIO);
652    } else {
653        run("AudioCommandThread", ANDROID_PRIORITY_AUDIO);
654    }
655}
656
657bool AudioPolicyService::AudioCommandThread::threadLoop()
658{
659    nsecs_t waitTime = INT64_MAX;
660
661    mLock.lock();
662    while (!exitPending())
663    {
664        while(!mAudioCommands.isEmpty()) {
665            nsecs_t curTime = systemTime();
666            // commands are sorted by increasing time stamp: execute them from index 0 and up
667            if (mAudioCommands[0]->mTime <= curTime) {
668                AudioCommand *command = mAudioCommands[0];
669                mAudioCommands.removeAt(0);
670                mLastCommand = *command;
671
672                switch (command->mCommand) {
673                case START_TONE: {
674                    mLock.unlock();
675                    ToneData *data = (ToneData *)command->mParam;
676                    LOGV("AudioCommandThread() processing start tone %d on stream %d",
677                            data->mType, data->mStream);
678                    if (mpToneGenerator != NULL)
679                        delete mpToneGenerator;
680                    mpToneGenerator = new ToneGenerator(data->mStream, 1.0);
681                    mpToneGenerator->startTone(data->mType);
682                    delete data;
683                    mLock.lock();
684                    }break;
685                case STOP_TONE: {
686                    mLock.unlock();
687                    LOGV("AudioCommandThread() processing stop tone");
688                    if (mpToneGenerator != NULL) {
689                        mpToneGenerator->stopTone();
690                        delete mpToneGenerator;
691                        mpToneGenerator = NULL;
692                    }
693                    mLock.lock();
694                    }break;
695                case SET_VOLUME: {
696                    VolumeData *data = (VolumeData *)command->mParam;
697                    LOGV("AudioCommandThread() processing set volume stream %d, \
698                            volume %f, output %d", data->mStream, data->mVolume, data->mIO);
699                    command->mStatus = AudioSystem::setStreamVolume(data->mStream,
700                                                                    data->mVolume,
701                                                                    data->mIO);
702                    if (command->mWaitStatus) {
703                        command->mCond.signal();
704                        mWaitWorkCV.wait(mLock);
705                    }
706                    delete data;
707                    }break;
708                case SET_PARAMETERS: {
709                     ParametersData *data = (ParametersData *)command->mParam;
710                     LOGV("AudioCommandThread() processing set parameters string %s, io %d",
711                             data->mKeyValuePairs.string(), data->mIO);
712                     command->mStatus = AudioSystem::setParameters(data->mIO, data->mKeyValuePairs);
713                     if (command->mWaitStatus) {
714                         command->mCond.signal();
715                         mWaitWorkCV.wait(mLock);
716                     }
717                     delete data;
718                     }break;
719                case SET_VOICE_VOLUME: {
720                    VoiceVolumeData *data = (VoiceVolumeData *)command->mParam;
721                    LOGV("AudioCommandThread() processing set voice volume volume %f",
722                            data->mVolume);
723                    command->mStatus = AudioSystem::setVoiceVolume(data->mVolume);
724                    if (command->mWaitStatus) {
725                        command->mCond.signal();
726                        mWaitWorkCV.wait(mLock);
727                    }
728                    delete data;
729                    }break;
730                default:
731                    LOGW("AudioCommandThread() unknown command %d", command->mCommand);
732                }
733                delete command;
734                waitTime = INT64_MAX;
735            } else {
736                waitTime = mAudioCommands[0]->mTime - curTime;
737                break;
738            }
739        }
740        // release delayed commands wake lock
741        if (mName != "" && mAudioCommands.isEmpty()) {
742            release_wake_lock(mName.string());
743        }
744        LOGV("AudioCommandThread() going to sleep");
745        mWaitWorkCV.waitRelative(mLock, waitTime);
746        LOGV("AudioCommandThread() waking up");
747    }
748    mLock.unlock();
749    return false;
750}
751
752status_t AudioPolicyService::AudioCommandThread::dump(int fd)
753{
754    const size_t SIZE = 256;
755    char buffer[SIZE];
756    String8 result;
757
758    snprintf(buffer, SIZE, "AudioCommandThread %p Dump\n", this);
759    result.append(buffer);
760    write(fd, result.string(), result.size());
761
762    bool locked = tryLock(mLock);
763    if (!locked) {
764        String8 result2(kCmdDeadlockedString);
765        write(fd, result2.string(), result2.size());
766    }
767
768    snprintf(buffer, SIZE, "- Commands:\n");
769    result = String8(buffer);
770    result.append("   Command Time        Wait pParam\n");
771    for (int i = 0; i < (int)mAudioCommands.size(); i++) {
772        mAudioCommands[i]->dump(buffer, SIZE);
773        result.append(buffer);
774    }
775    result.append("  Last Command\n");
776    mLastCommand.dump(buffer, SIZE);
777    result.append(buffer);
778
779    write(fd, result.string(), result.size());
780
781    if (locked) mLock.unlock();
782
783    return NO_ERROR;
784}
785
786void AudioPolicyService::AudioCommandThread::startToneCommand(int type, int stream)
787{
788    AudioCommand *command = new AudioCommand();
789    command->mCommand = START_TONE;
790    ToneData *data = new ToneData();
791    data->mType = type;
792    data->mStream = stream;
793    command->mParam = (void *)data;
794    command->mWaitStatus = false;
795    Mutex::Autolock _l(mLock);
796    insertCommand_l(command);
797    LOGV("AudioCommandThread() adding tone start type %d, stream %d", type, stream);
798    mWaitWorkCV.signal();
799}
800
801void AudioPolicyService::AudioCommandThread::stopToneCommand()
802{
803    AudioCommand *command = new AudioCommand();
804    command->mCommand = STOP_TONE;
805    command->mParam = NULL;
806    command->mWaitStatus = false;
807    Mutex::Autolock _l(mLock);
808    insertCommand_l(command);
809    LOGV("AudioCommandThread() adding tone stop");
810    mWaitWorkCV.signal();
811}
812
813status_t AudioPolicyService::AudioCommandThread::volumeCommand(int stream,
814                                                               float volume,
815                                                               int output,
816                                                               int delayMs)
817{
818    status_t status = NO_ERROR;
819
820    AudioCommand *command = new AudioCommand();
821    command->mCommand = SET_VOLUME;
822    VolumeData *data = new VolumeData();
823    data->mStream = stream;
824    data->mVolume = volume;
825    data->mIO = output;
826    command->mParam = data;
827    if (delayMs == 0) {
828        command->mWaitStatus = true;
829    } else {
830        command->mWaitStatus = false;
831    }
832    Mutex::Autolock _l(mLock);
833    insertCommand_l(command, delayMs);
834    LOGV("AudioCommandThread() adding set volume stream %d, volume %f, output %d",
835            stream, volume, output);
836    mWaitWorkCV.signal();
837    if (command->mWaitStatus) {
838        command->mCond.wait(mLock);
839        status =  command->mStatus;
840        mWaitWorkCV.signal();
841    }
842    return status;
843}
844
845status_t AudioPolicyService::AudioCommandThread::parametersCommand(int ioHandle,
846                                                                   const char *keyValuePairs,
847                                                                   int delayMs)
848{
849    status_t status = NO_ERROR;
850
851    AudioCommand *command = new AudioCommand();
852    command->mCommand = SET_PARAMETERS;
853    ParametersData *data = new ParametersData();
854    data->mIO = ioHandle;
855    data->mKeyValuePairs = String8(keyValuePairs);
856    command->mParam = data;
857    if (delayMs == 0) {
858        command->mWaitStatus = true;
859    } else {
860        command->mWaitStatus = false;
861    }
862    Mutex::Autolock _l(mLock);
863    insertCommand_l(command, delayMs);
864    LOGV("AudioCommandThread() adding set parameter string %s, io %d ,delay %d",
865            keyValuePairs, ioHandle, delayMs);
866    mWaitWorkCV.signal();
867    if (command->mWaitStatus) {
868        command->mCond.wait(mLock);
869        status =  command->mStatus;
870        mWaitWorkCV.signal();
871    }
872    return status;
873}
874
875status_t AudioPolicyService::AudioCommandThread::voiceVolumeCommand(float volume, int delayMs)
876{
877    status_t status = NO_ERROR;
878
879    AudioCommand *command = new AudioCommand();
880    command->mCommand = SET_VOICE_VOLUME;
881    VoiceVolumeData *data = new VoiceVolumeData();
882    data->mVolume = volume;
883    command->mParam = data;
884    if (delayMs == 0) {
885        command->mWaitStatus = true;
886    } else {
887        command->mWaitStatus = false;
888    }
889    Mutex::Autolock _l(mLock);
890    insertCommand_l(command, delayMs);
891    LOGV("AudioCommandThread() adding set voice volume volume %f", volume);
892    mWaitWorkCV.signal();
893    if (command->mWaitStatus) {
894        command->mCond.wait(mLock);
895        status =  command->mStatus;
896        mWaitWorkCV.signal();
897    }
898    return status;
899}
900
901// insertCommand_l() must be called with mLock held
902void AudioPolicyService::AudioCommandThread::insertCommand_l(AudioCommand *command, int delayMs)
903{
904    ssize_t i;
905    Vector <AudioCommand *> removedCommands;
906
907    command->mTime = systemTime() + milliseconds(delayMs);
908
909    // acquire wake lock to make sure delayed commands are processed
910    if (mName != "" && mAudioCommands.isEmpty()) {
911        acquire_wake_lock(PARTIAL_WAKE_LOCK, mName.string());
912    }
913
914    // check same pending commands with later time stamps and eliminate them
915    for (i = mAudioCommands.size()-1; i >= 0; i--) {
916        AudioCommand *command2 = mAudioCommands[i];
917        // commands are sorted by increasing time stamp: no need to scan the rest of mAudioCommands
918        if (command2->mTime <= command->mTime) break;
919        if (command2->mCommand != command->mCommand) continue;
920
921        switch (command->mCommand) {
922        case SET_PARAMETERS: {
923            ParametersData *data = (ParametersData *)command->mParam;
924            ParametersData *data2 = (ParametersData *)command2->mParam;
925            if (data->mIO != data2->mIO) break;
926            LOGV("Comparing parameter command %s to new command %s",
927                    data2->mKeyValuePairs.string(), data->mKeyValuePairs.string());
928            AudioParameter param = AudioParameter(data->mKeyValuePairs);
929            AudioParameter param2 = AudioParameter(data2->mKeyValuePairs);
930            for (size_t j = 0; j < param.size(); j++) {
931               String8 key;
932               String8 value;
933               param.getAt(j, key, value);
934               for (size_t k = 0; k < param2.size(); k++) {
935                  String8 key2;
936                  String8 value2;
937                  param2.getAt(k, key2, value2);
938                  if (key2 == key) {
939                      param2.remove(key2);
940                      LOGV("Filtering out parameter %s", key2.string());
941                      break;
942                  }
943               }
944            }
945            // if all keys have been filtered out, remove the command.
946            // otherwise, update the key value pairs
947            if (param2.size() == 0) {
948                removedCommands.add(command2);
949            } else {
950                data2->mKeyValuePairs = param2.toString();
951            }
952        } break;
953
954        case SET_VOLUME: {
955            VolumeData *data = (VolumeData *)command->mParam;
956            VolumeData *data2 = (VolumeData *)command2->mParam;
957            if (data->mIO != data2->mIO) break;
958            if (data->mStream != data2->mStream) break;
959            LOGV("Filtering out volume command on output %d for stream %d",
960                    data->mIO, data->mStream);
961            removedCommands.add(command2);
962        } break;
963        case START_TONE:
964        case STOP_TONE:
965        default:
966            break;
967        }
968    }
969
970    // remove filtered commands
971    for (size_t j = 0; j < removedCommands.size(); j++) {
972        // removed commands always have time stamps greater than current command
973        for (size_t k = i + 1; k < mAudioCommands.size(); k++) {
974            if (mAudioCommands[k] == removedCommands[j]) {
975                LOGV("suppressing command: %d", mAudioCommands[k]->mCommand);
976                mAudioCommands.removeAt(k);
977                break;
978            }
979        }
980    }
981    removedCommands.clear();
982
983    // insert command at the right place according to its time stamp
984    LOGV("inserting command: %d at index %d, num commands %d",
985            command->mCommand, (int)i+1, mAudioCommands.size());
986    mAudioCommands.insertAt(command, i + 1);
987}
988
989void AudioPolicyService::AudioCommandThread::exit()
990{
991    LOGV("AudioCommandThread::exit");
992    {
993        AutoMutex _l(mLock);
994        requestExit();
995        mWaitWorkCV.signal();
996    }
997    requestExitAndWait();
998}
999
1000void AudioPolicyService::AudioCommandThread::AudioCommand::dump(char* buffer, size_t size)
1001{
1002    snprintf(buffer, size, "   %02d      %06d.%03d  %01u    %p\n",
1003            mCommand,
1004            (int)ns2s(mTime),
1005            (int)ns2ms(mTime)%1000,
1006            mWaitStatus,
1007            mParam);
1008}
1009
1010/******* helpers for the service_ops callbacks defined below *********/
1011void AudioPolicyService::setParameters(audio_io_handle_t ioHandle,
1012                                       const char *keyValuePairs,
1013                                       int delayMs)
1014{
1015    mAudioCommandThread->parametersCommand((int)ioHandle, keyValuePairs,
1016                                           delayMs);
1017}
1018
1019int AudioPolicyService::setStreamVolume(audio_stream_type_t stream,
1020                                        float volume,
1021                                        audio_io_handle_t output,
1022                                        int delayMs)
1023{
1024    return (int)mAudioCommandThread->volumeCommand((int)stream, volume,
1025                                                   (int)output, delayMs);
1026}
1027
1028int AudioPolicyService::startTone(audio_policy_tone_t tone,
1029                                  audio_stream_type_t stream)
1030{
1031    if (tone != AUDIO_POLICY_TONE_IN_CALL_NOTIFICATION)
1032        LOGE("startTone: illegal tone requested (%d)", tone);
1033    if (stream != AUDIO_STREAM_VOICE_CALL)
1034        LOGE("startTone: illegal stream (%d) requested for tone %d", stream,
1035             tone);
1036    mTonePlaybackThread->startToneCommand(ToneGenerator::TONE_SUP_CALL_WAITING,
1037                                          AUDIO_STREAM_VOICE_CALL);
1038    return 0;
1039}
1040
1041int AudioPolicyService::stopTone()
1042{
1043    mTonePlaybackThread->stopToneCommand();
1044    return 0;
1045}
1046
1047int AudioPolicyService::setVoiceVolume(float volume, int delayMs)
1048{
1049    return (int)mAudioCommandThread->voiceVolumeCommand(volume, delayMs);
1050}
1051
1052// ----------------------------------------------------------------------------
1053// Audio pre-processing configuration
1054// ----------------------------------------------------------------------------
1055
1056const char *AudioPolicyService::kInputSourceNames[AUDIO_SOURCE_CNT -1] = {
1057    MIC_SRC_TAG,
1058    VOICE_UL_SRC_TAG,
1059    VOICE_DL_SRC_TAG,
1060    VOICE_CALL_SRC_TAG,
1061    CAMCORDER_SRC_TAG,
1062    VOICE_REC_SRC_TAG,
1063    VOICE_COMM_SRC_TAG
1064};
1065
1066// returns the audio_source_t enum corresponding to the input source name or
1067// AUDIO_SOURCE_CNT is no match found
1068audio_source_t AudioPolicyService::inputSourceNameToEnum(const char *name)
1069{
1070    int i;
1071    for (i = AUDIO_SOURCE_MIC; i < AUDIO_SOURCE_CNT; i++) {
1072        if (strcmp(name, kInputSourceNames[i - AUDIO_SOURCE_MIC]) == 0) {
1073            LOGV("inputSourceNameToEnum found source %s %d", name, i);
1074            break;
1075        }
1076    }
1077    return (audio_source_t)i;
1078}
1079
1080size_t AudioPolicyService::growParamSize(char *param,
1081                                         size_t size,
1082                                         size_t *curSize,
1083                                         size_t *totSize)
1084{
1085    // *curSize is at least sizeof(effect_param_t) + 2 * sizeof(int)
1086    size_t pos = ((*curSize - 1 ) / size + 1) * size;
1087
1088    if (pos + size > *totSize) {
1089        while (pos + size > *totSize) {
1090            *totSize += ((*totSize + 7) / 8) * 4;
1091        }
1092        param = (char *)realloc(param, *totSize);
1093    }
1094    *curSize = pos + size;
1095    return pos;
1096}
1097
1098size_t AudioPolicyService::readParamValue(cnode *node,
1099                                          char *param,
1100                                          size_t *curSize,
1101                                          size_t *totSize)
1102{
1103    if (strncmp(node->name, SHORT_TAG, sizeof(SHORT_TAG) + 1) == 0) {
1104        size_t pos = growParamSize(param, sizeof(short), curSize, totSize);
1105        *(short *)((char *)param + pos) = (short)atoi(node->value);
1106        LOGV("readParamValue() reading short %d", *(short *)((char *)param + pos));
1107        return sizeof(short);
1108    } else if (strncmp(node->name, INT_TAG, sizeof(INT_TAG) + 1) == 0) {
1109        size_t pos = growParamSize(param, sizeof(int), curSize, totSize);
1110        *(int *)((char *)param + pos) = atoi(node->value);
1111        LOGV("readParamValue() reading int %d", *(int *)((char *)param + pos));
1112        return sizeof(int);
1113    } else if (strncmp(node->name, FLOAT_TAG, sizeof(FLOAT_TAG) + 1) == 0) {
1114        size_t pos = growParamSize(param, sizeof(float), curSize, totSize);
1115        *(float *)((char *)param + pos) = (float)atof(node->value);
1116        LOGV("readParamValue() reading float %f",*(float *)((char *)param + pos));
1117        return sizeof(float);
1118    } else if (strncmp(node->name, BOOL_TAG, sizeof(BOOL_TAG) + 1) == 0) {
1119        size_t pos = growParamSize(param, sizeof(bool), curSize, totSize);
1120        if (strncmp(node->value, "false", strlen("false") + 1) == 0) {
1121            *(bool *)((char *)param + pos) = false;
1122        } else {
1123            *(bool *)((char *)param + pos) = true;
1124        }
1125        LOGV("readParamValue() reading bool %s",*(bool *)((char *)param + pos) ? "true" : "false");
1126        return sizeof(bool);
1127    } else if (strncmp(node->name, STRING_TAG, sizeof(STRING_TAG) + 1) == 0) {
1128        size_t len = strnlen(node->value, EFFECT_STRING_LEN_MAX);
1129        if (*curSize + len + 1 > *totSize) {
1130            *totSize = *curSize + len + 1;
1131            param = (char *)realloc(param, *totSize);
1132        }
1133        strncpy(param + *curSize, node->value, len);
1134        *curSize += len;
1135        param[*curSize] = '\0';
1136        LOGV("readParamValue() reading string %s", param + *curSize - len);
1137        return len;
1138    }
1139    LOGW("readParamValue() unknown param type %s", node->name);
1140    return 0;
1141}
1142
1143effect_param_t *AudioPolicyService::loadEffectParameter(cnode *root)
1144{
1145    cnode *param;
1146    cnode *value;
1147    size_t curSize = sizeof(effect_param_t);
1148    size_t totSize = sizeof(effect_param_t) + 2 * sizeof(int);
1149    effect_param_t *fx_param = (effect_param_t *)malloc(totSize);
1150
1151    param = config_find(root, PARAM_TAG);
1152    value = config_find(root, VALUE_TAG);
1153    if (param == NULL && value == NULL) {
1154        // try to parse simple parameter form {int int}
1155        param = root->first_child;
1156        if (param) {
1157            // Note: that a pair of random strings is read as 0 0
1158            int *ptr = (int *)fx_param->data;
1159            int *ptr2 = (int *)((char *)param + sizeof(effect_param_t));
1160            LOGW("loadEffectParameter() ptr %p ptr2 %p", ptr, ptr2);
1161            *ptr++ = atoi(param->name);
1162            *ptr = atoi(param->value);
1163            fx_param->psize = sizeof(int);
1164            fx_param->vsize = sizeof(int);
1165            return fx_param;
1166        }
1167    }
1168    if (param == NULL || value == NULL) {
1169        LOGW("loadEffectParameter() invalid parameter description %s", root->name);
1170        goto error;
1171    }
1172
1173    fx_param->psize = 0;
1174    param = param->first_child;
1175    while (param) {
1176        LOGV("loadEffectParameter() reading param of type %s", param->name);
1177        size_t size = readParamValue(param, (char *)fx_param, &curSize, &totSize);
1178        if (size == 0) {
1179            goto error;
1180        }
1181        fx_param->psize += size;
1182        param = param->next;
1183    }
1184
1185    // align start of value field on 32 bit boundary
1186    curSize = ((curSize - 1 ) / sizeof(int) + 1) * sizeof(int);
1187
1188    fx_param->vsize = 0;
1189    value = value->first_child;
1190    while (value) {
1191        LOGV("loadEffectParameter() reading value of type %s", value->name);
1192        size_t size = readParamValue(value, (char *)fx_param, &curSize, &totSize);
1193        if (size == 0) {
1194            goto error;
1195        }
1196        fx_param->vsize += size;
1197        value = value->next;
1198    }
1199
1200    return fx_param;
1201
1202error:
1203    delete fx_param;
1204    return NULL;
1205}
1206
1207void AudioPolicyService::loadEffectParameters(cnode *root, Vector <effect_param_t *>& params)
1208{
1209    cnode *node = root->first_child;
1210    while (node) {
1211        LOGV("loadEffectParameters() loading param %s", node->name);
1212        effect_param_t *param = loadEffectParameter(node);
1213        if (param == NULL) {
1214            node = node->next;
1215            continue;
1216        }
1217        params.add(param);
1218        node = node->next;
1219    }
1220}
1221
1222AudioPolicyService::InputSourceDesc *AudioPolicyService::loadInputSource(
1223                                                            cnode *root,
1224                                                            const Vector <EffectDesc *>& effects)
1225{
1226    cnode *node = root->first_child;
1227    if (node == NULL) {
1228        LOGW("loadInputSource() empty element %s", root->name);
1229        return NULL;
1230    }
1231    InputSourceDesc *source = new InputSourceDesc();
1232    while (node) {
1233        size_t i;
1234        for (i = 0; i < effects.size(); i++) {
1235            if (strncmp(effects[i]->mName, node->name, EFFECT_STRING_LEN_MAX) == 0) {
1236                LOGV("loadInputSource() found effect %s in list", node->name);
1237                break;
1238            }
1239        }
1240        if (i == effects.size()) {
1241            LOGV("loadInputSource() effect %s not in list", node->name);
1242            node = node->next;
1243            continue;
1244        }
1245        EffectDesc *effect = new EffectDesc(*effects[i]);
1246        loadEffectParameters(node, effect->mParams);
1247        LOGV("loadInputSource() adding effect %s uuid %08x", effect->mName, effect->mUuid.timeLow);
1248        source->mEffects.add(effect);
1249        node = node->next;
1250    }
1251    if (source->mEffects.size() == 0) {
1252        LOGW("loadInputSource() no valid effects found in source %s", root->name);
1253        delete source;
1254        return NULL;
1255    }
1256    return source;
1257}
1258
1259status_t AudioPolicyService::loadInputSources(cnode *root, const Vector <EffectDesc *>& effects)
1260{
1261    cnode *node = config_find(root, PREPROCESSING_TAG);
1262    if (node == NULL) {
1263        return -ENOENT;
1264    }
1265    node = node->first_child;
1266    while (node) {
1267        audio_source_t source = inputSourceNameToEnum(node->name);
1268        if (source == AUDIO_SOURCE_CNT) {
1269            LOGW("loadInputSources() invalid input source %s", node->name);
1270            node = node->next;
1271            continue;
1272        }
1273        LOGV("loadInputSources() loading input source %s", node->name);
1274        InputSourceDesc *desc = loadInputSource(node, effects);
1275        if (desc == NULL) {
1276            node = node->next;
1277            continue;
1278        }
1279        mInputSources.add(source, desc);
1280        node = node->next;
1281    }
1282    return NO_ERROR;
1283}
1284
1285AudioPolicyService::EffectDesc *AudioPolicyService::loadEffect(cnode *root)
1286{
1287    cnode *node = config_find(root, UUID_TAG);
1288    if (node == NULL) {
1289        return NULL;
1290    }
1291    effect_uuid_t uuid;
1292    if (AudioEffect::stringToGuid(node->value, &uuid) != NO_ERROR) {
1293        LOGW("loadEffect() invalid uuid %s", node->value);
1294        return NULL;
1295    }
1296    EffectDesc *effect = new EffectDesc();
1297    effect->mName = strdup(root->name);
1298    memcpy(&effect->mUuid, &uuid, sizeof(effect_uuid_t));
1299
1300    return effect;
1301}
1302
1303status_t AudioPolicyService::loadEffects(cnode *root, Vector <EffectDesc *>& effects)
1304{
1305    cnode *node = config_find(root, EFFECTS_TAG);
1306    if (node == NULL) {
1307        return -ENOENT;
1308    }
1309    node = node->first_child;
1310    while (node) {
1311        LOGV("loadEffects() loading effect %s", node->name);
1312        EffectDesc *effect = loadEffect(node);
1313        if (effect == NULL) {
1314            node = node->next;
1315            continue;
1316        }
1317        effects.add(effect);
1318        node = node->next;
1319    }
1320    return NO_ERROR;
1321}
1322
1323status_t AudioPolicyService::loadPreProcessorConfig(const char *path)
1324{
1325    cnode *root;
1326    char *data;
1327
1328    data = (char *)load_file(path, NULL);
1329    if (data == NULL) {
1330        return -ENODEV;
1331    }
1332    root = config_node("", "");
1333    config_load(root, data);
1334
1335    Vector <EffectDesc *> effects;
1336    loadEffects(root, effects);
1337    loadInputSources(root, effects);
1338
1339    config_free(root);
1340    free(root);
1341    free(data);
1342
1343    return NO_ERROR;
1344}
1345
1346/* implementation of the interface to the policy manager */
1347extern "C" {
1348
1349static audio_io_handle_t aps_open_output(void *service,
1350                                             uint32_t *pDevices,
1351                                             uint32_t *pSamplingRate,
1352                                             uint32_t *pFormat,
1353                                             uint32_t *pChannels,
1354                                             uint32_t *pLatencyMs,
1355                                             audio_policy_output_flags_t flags)
1356{
1357    sp<IAudioFlinger> af = AudioSystem::get_audio_flinger();
1358    if (af == NULL) {
1359        LOGW("%s: could not get AudioFlinger", __func__);
1360        return 0;
1361    }
1362
1363    return af->openOutput(pDevices, pSamplingRate, pFormat, pChannels,
1364                          pLatencyMs, flags);
1365}
1366
1367static audio_io_handle_t aps_open_dup_output(void *service,
1368                                                 audio_io_handle_t output1,
1369                                                 audio_io_handle_t output2)
1370{
1371    sp<IAudioFlinger> af = AudioSystem::get_audio_flinger();
1372    if (af == NULL) {
1373        LOGW("%s: could not get AudioFlinger", __func__);
1374        return 0;
1375    }
1376    return af->openDuplicateOutput(output1, output2);
1377}
1378
1379static int aps_close_output(void *service, audio_io_handle_t output)
1380{
1381    sp<IAudioFlinger> af = AudioSystem::get_audio_flinger();
1382    if (af == NULL)
1383        return PERMISSION_DENIED;
1384
1385    return af->closeOutput(output);
1386}
1387
1388static int aps_suspend_output(void *service, audio_io_handle_t output)
1389{
1390    sp<IAudioFlinger> af = AudioSystem::get_audio_flinger();
1391    if (af == NULL) {
1392        LOGW("%s: could not get AudioFlinger", __func__);
1393        return PERMISSION_DENIED;
1394    }
1395
1396    return af->suspendOutput(output);
1397}
1398
1399static int aps_restore_output(void *service, audio_io_handle_t output)
1400{
1401    sp<IAudioFlinger> af = AudioSystem::get_audio_flinger();
1402    if (af == NULL) {
1403        LOGW("%s: could not get AudioFlinger", __func__);
1404        return PERMISSION_DENIED;
1405    }
1406
1407    return af->restoreOutput(output);
1408}
1409
1410static audio_io_handle_t aps_open_input(void *service,
1411                                            uint32_t *pDevices,
1412                                            uint32_t *pSamplingRate,
1413                                            uint32_t *pFormat,
1414                                            uint32_t *pChannels,
1415                                            uint32_t acoustics)
1416{
1417    sp<IAudioFlinger> af = AudioSystem::get_audio_flinger();
1418    if (af == NULL) {
1419        LOGW("%s: could not get AudioFlinger", __func__);
1420        return 0;
1421    }
1422
1423    return af->openInput(pDevices, pSamplingRate, pFormat, pChannels,
1424                         acoustics);
1425}
1426
1427static int aps_close_input(void *service, audio_io_handle_t input)
1428{
1429    sp<IAudioFlinger> af = AudioSystem::get_audio_flinger();
1430    if (af == NULL)
1431        return PERMISSION_DENIED;
1432
1433    return af->closeInput(input);
1434}
1435
1436static int aps_set_stream_output(void *service, audio_stream_type_t stream,
1437                                     audio_io_handle_t output)
1438{
1439    sp<IAudioFlinger> af = AudioSystem::get_audio_flinger();
1440    if (af == NULL)
1441        return PERMISSION_DENIED;
1442
1443    return af->setStreamOutput(stream, output);
1444}
1445
1446static int aps_move_effects(void *service, int session,
1447                                audio_io_handle_t src_output,
1448                                audio_io_handle_t dst_output)
1449{
1450    sp<IAudioFlinger> af = AudioSystem::get_audio_flinger();
1451    if (af == NULL)
1452        return PERMISSION_DENIED;
1453
1454    return af->moveEffects(session, (int)src_output, (int)dst_output);
1455}
1456
1457static char * aps_get_parameters(void *service, audio_io_handle_t io_handle,
1458                                     const char *keys)
1459{
1460    String8 result = AudioSystem::getParameters(io_handle, String8(keys));
1461    return strdup(result.string());
1462}
1463
1464static void aps_set_parameters(void *service, audio_io_handle_t io_handle,
1465                                   const char *kv_pairs, int delay_ms)
1466{
1467    AudioPolicyService *audioPolicyService = (AudioPolicyService *)service;
1468
1469    audioPolicyService->setParameters(io_handle, kv_pairs, delay_ms);
1470}
1471
1472static int aps_set_stream_volume(void *service, audio_stream_type_t stream,
1473                                     float volume, audio_io_handle_t output,
1474                                     int delay_ms)
1475{
1476    AudioPolicyService *audioPolicyService = (AudioPolicyService *)service;
1477
1478    return audioPolicyService->setStreamVolume(stream, volume, output,
1479                                               delay_ms);
1480}
1481
1482static int aps_start_tone(void *service, audio_policy_tone_t tone,
1483                              audio_stream_type_t stream)
1484{
1485    AudioPolicyService *audioPolicyService = (AudioPolicyService *)service;
1486
1487    return audioPolicyService->startTone(tone, stream);
1488}
1489
1490static int aps_stop_tone(void *service)
1491{
1492    AudioPolicyService *audioPolicyService = (AudioPolicyService *)service;
1493
1494    return audioPolicyService->stopTone();
1495}
1496
1497static int aps_set_voice_volume(void *service, float volume, int delay_ms)
1498{
1499    AudioPolicyService *audioPolicyService = (AudioPolicyService *)service;
1500
1501    return audioPolicyService->setVoiceVolume(volume, delay_ms);
1502}
1503
1504}; // extern "C"
1505
1506namespace {
1507    struct audio_policy_service_ops aps_ops = {
1508        open_output           : aps_open_output,
1509        open_duplicate_output : aps_open_dup_output,
1510        close_output          : aps_close_output,
1511        suspend_output        : aps_suspend_output,
1512        restore_output        : aps_restore_output,
1513        open_input            : aps_open_input,
1514        close_input           : aps_close_input,
1515        set_stream_volume     : aps_set_stream_volume,
1516        set_stream_output     : aps_set_stream_output,
1517        set_parameters        : aps_set_parameters,
1518        get_parameters        : aps_get_parameters,
1519        start_tone            : aps_start_tone,
1520        stop_tone             : aps_stop_tone,
1521        set_voice_volume      : aps_set_voice_volume,
1522        move_effects          : aps_move_effects,
1523    };
1524}; // namespace <unnamed>
1525
1526}; // namespace android
1527