AudioPolicyService.cpp revision a0d68338a88c2ddb4502f95017b546d603ef1ec7 
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 <hardware_legacy/power.h>
35#include <media/AudioEffect.h>
36#include <media/EffectsFactoryApi.h>
37
38#include <hardware/hardware.h>
39#include <system/audio.h>
40#include <system/audio_policy.h>
41#include <hardware/audio_policy.h>
42#include <audio_effects/audio_effects_conf.h>
43
44namespace android {
45
46static const char kDeadlockedString[] = "AudioPolicyService may be deadlocked\n";
47static const char kCmdDeadlockedString[] = "AudioPolicyService command thread may be deadlocked\n";
48
49static const int kDumpLockRetries = 50;
50static const int kDumpLockSleepUs = 20000;
51
52static bool checkPermission() {
53    if (getpid() == IPCThreadState::self()->getCallingPid()) return true;
54    bool ok = checkCallingPermission(String16("android.permission.MODIFY_AUDIO_SETTINGS"));
55    if (!ok) ALOGE("Request requires android.permission.MODIFY_AUDIO_SETTINGS");
56    return ok;
57}
58
59namespace {
60    extern struct audio_policy_service_ops aps_ops;
61};
62
63// ----------------------------------------------------------------------------
64
65AudioPolicyService::AudioPolicyService()
66    : BnAudioPolicyService() , mpAudioPolicyDev(NULL) , mpAudioPolicy(NULL)
67{
68    char value[PROPERTY_VALUE_MAX];
69    const struct hw_module_t *module;
70    int forced_val;
71    int rc;
72
73    Mutex::Autolock _l(mLock);
74
75    // start tone playback thread
76    mTonePlaybackThread = new AudioCommandThread(String8(""));
77    // start audio commands thread
78    mAudioCommandThread = new AudioCommandThread(String8("ApmCommandThread"));
79
80    /* instantiate the audio policy manager */
81    rc = hw_get_module(AUDIO_POLICY_HARDWARE_MODULE_ID, &module);
82    if (rc)
83        return;
84
85    rc = audio_policy_dev_open(module, &mpAudioPolicyDev);
86    ALOGE_IF(rc, "couldn't open audio policy device (%s)", strerror(-rc));
87    if (rc)
88        return;
89
90    rc = mpAudioPolicyDev->create_audio_policy(mpAudioPolicyDev, &aps_ops, this,
91                                               &mpAudioPolicy);
92    ALOGE_IF(rc, "couldn't create audio policy (%s)", strerror(-rc));
93    if (rc)
94        return;
95
96    rc = mpAudioPolicy->init_check(mpAudioPolicy);
97    ALOGE_IF(rc, "couldn't init_check the audio policy (%s)", strerror(-rc));
98    if (rc)
99        return;
100
101    property_get("ro.camera.sound.forced", value, "0");
102    forced_val = strtol(value, NULL, 0);
103    mpAudioPolicy->set_can_mute_enforced_audible(mpAudioPolicy, !forced_val);
104
105    ALOGI("Loaded audio policy from %s (%s)", module->name, module->id);
106
107    // load audio pre processing modules
108    if (access(AUDIO_EFFECT_VENDOR_CONFIG_FILE, R_OK) == 0) {
109        loadPreProcessorConfig(AUDIO_EFFECT_VENDOR_CONFIG_FILE);
110    } else if (access(AUDIO_EFFECT_DEFAULT_CONFIG_FILE, R_OK) == 0) {
111        loadPreProcessorConfig(AUDIO_EFFECT_DEFAULT_CONFIG_FILE);
112    }
113}
114
115AudioPolicyService::~AudioPolicyService()
116{
117    mTonePlaybackThread->exit();
118    mTonePlaybackThread.clear();
119    mAudioCommandThread->exit();
120    mAudioCommandThread.clear();
121
122
123    // release audio pre processing resources
124    for (size_t i = 0; i < mInputSources.size(); i++) {
125        InputSourceDesc *source = mInputSources.valueAt(i);
126        Vector <EffectDesc *> effects = source->mEffects;
127        for (size_t j = 0; j < effects.size(); j++) {
128            delete effects[j]->mName;
129            Vector <effect_param_t *> params = effects[j]->mParams;
130            for (size_t k = 0; k < params.size(); k++) {
131                delete params[k];
132            }
133            params.clear();
134            delete effects[j];
135        }
136        effects.clear();
137        delete source;
138    }
139    mInputSources.clear();
140
141    for (size_t i = 0; i < mInputs.size(); i++) {
142        mInputs.valueAt(i)->mEffects.clear();
143        delete mInputs.valueAt(i);
144    }
145    mInputs.clear();
146
147    if (mpAudioPolicy != NULL && mpAudioPolicyDev != NULL)
148        mpAudioPolicyDev->destroy_audio_policy(mpAudioPolicyDev, mpAudioPolicy);
149    if (mpAudioPolicyDev != NULL)
150        audio_policy_dev_close(mpAudioPolicyDev);
151}
152
153status_t AudioPolicyService::setDeviceConnectionState(audio_devices_t device,
154                                                  audio_policy_dev_state_t state,
155                                                  const char *device_address)
156{
157    if (mpAudioPolicy == NULL) {
158        return NO_INIT;
159    }
160    if (!checkPermission()) {
161        return PERMISSION_DENIED;
162    }
163    if (!audio_is_output_device(device) && !audio_is_input_device(device)) {
164        return BAD_VALUE;
165    }
166    if (state != AUDIO_POLICY_DEVICE_STATE_AVAILABLE &&
167            state != AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE) {
168        return BAD_VALUE;
169    }
170
171    ALOGV("setDeviceConnectionState() tid %d", gettid());
172    Mutex::Autolock _l(mLock);
173    return mpAudioPolicy->set_device_connection_state(mpAudioPolicy, device,
174                                                      state, device_address);
175}
176
177audio_policy_dev_state_t AudioPolicyService::getDeviceConnectionState(
178                                                              audio_devices_t device,
179                                                              const char *device_address)
180{
181    if (mpAudioPolicy == NULL) {
182        return AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE;
183    }
184    return mpAudioPolicy->get_device_connection_state(mpAudioPolicy, device,
185                                                      device_address);
186}
187
188status_t AudioPolicyService::setPhoneState(audio_mode_t state)
189{
190    if (mpAudioPolicy == NULL) {
191        return NO_INIT;
192    }
193    if (!checkPermission()) {
194        return PERMISSION_DENIED;
195    }
196    if (uint32_t(state) >= AUDIO_MODE_CNT) {
197        return BAD_VALUE;
198    }
199
200    ALOGV("setPhoneState() tid %d", gettid());
201
202    // TODO: check if it is more appropriate to do it in platform specific policy manager
203    AudioSystem::setMode(state);
204
205    Mutex::Autolock _l(mLock);
206    mpAudioPolicy->set_phone_state(mpAudioPolicy, state);
207    return NO_ERROR;
208}
209
210status_t AudioPolicyService::setForceUse(audio_policy_force_use_t usage,
211                                         audio_policy_forced_cfg_t config)
212{
213    if (mpAudioPolicy == NULL) {
214        return NO_INIT;
215    }
216    if (!checkPermission()) {
217        return PERMISSION_DENIED;
218    }
219    if (usage < 0 || usage >= AUDIO_POLICY_FORCE_USE_CNT) {
220        return BAD_VALUE;
221    }
222    if (config < 0 || config >= AUDIO_POLICY_FORCE_CFG_CNT) {
223        return BAD_VALUE;
224    }
225    ALOGV("setForceUse() tid %d", gettid());
226    Mutex::Autolock _l(mLock);
227    mpAudioPolicy->set_force_use(mpAudioPolicy, usage, config);
228    return NO_ERROR;
229}
230
231audio_policy_forced_cfg_t AudioPolicyService::getForceUse(audio_policy_force_use_t usage)
232{
233    if (mpAudioPolicy == NULL) {
234        return AUDIO_POLICY_FORCE_NONE;
235    }
236    if (usage < 0 || usage >= AUDIO_POLICY_FORCE_USE_CNT) {
237        return AUDIO_POLICY_FORCE_NONE;
238    }
239    return mpAudioPolicy->get_force_use(mpAudioPolicy, usage);
240}
241
242audio_io_handle_t AudioPolicyService::getOutput(audio_stream_type_t stream,
243                                    uint32_t samplingRate,
244                                    audio_format_t format,
245                                    uint32_t channels,
246                                    audio_policy_output_flags_t flags)
247{
248    if (mpAudioPolicy == NULL) {
249        return 0;
250    }
251    ALOGV("getOutput() tid %d", gettid());
252    Mutex::Autolock _l(mLock);
253    return mpAudioPolicy->get_output(mpAudioPolicy, stream, samplingRate, format, channels, flags);
254}
255
256status_t AudioPolicyService::startOutput(audio_io_handle_t output,
257                                         audio_stream_type_t stream,
258                                         int session)
259{
260    if (mpAudioPolicy == NULL) {
261        return NO_INIT;
262    }
263    ALOGV("startOutput() tid %d", gettid());
264    Mutex::Autolock _l(mLock);
265    return mpAudioPolicy->start_output(mpAudioPolicy, output, stream, session);
266}
267
268status_t AudioPolicyService::stopOutput(audio_io_handle_t output,
269                                        audio_stream_type_t stream,
270                                        int session)
271{
272    if (mpAudioPolicy == NULL) {
273        return NO_INIT;
274    }
275    ALOGV("stopOutput() tid %d", gettid());
276    Mutex::Autolock _l(mLock);
277    return mpAudioPolicy->stop_output(mpAudioPolicy, output, stream, session);
278}
279
280void AudioPolicyService::releaseOutput(audio_io_handle_t output)
281{
282    if (mpAudioPolicy == NULL) {
283        return;
284    }
285    ALOGV("releaseOutput() tid %d", gettid());
286    Mutex::Autolock _l(mLock);
287    mpAudioPolicy->release_output(mpAudioPolicy, output);
288}
289
290audio_io_handle_t AudioPolicyService::getInput(audio_source_t inputSource,
291                                    uint32_t samplingRate,
292                                    audio_format_t format,
293                                    uint32_t channels,
294                                    audio_in_acoustics_t acoustics,
295                                    int audioSession)
296{
297    if (mpAudioPolicy == NULL) {
298        return 0;
299    }
300    // already checked by client, but double-check in case the client wrapper is bypassed
301    if (uint32_t(inputSource) >= AUDIO_SOURCE_CNT) {
302        return 0;
303    }
304    Mutex::Autolock _l(mLock);
305    audio_io_handle_t input = mpAudioPolicy->get_input(mpAudioPolicy, inputSource, samplingRate,
306                                                       format, channels, acoustics);
307
308    if (input == 0) {
309        return input;
310    }
311    // create audio pre processors according to input source
312    ssize_t index = mInputSources.indexOfKey(inputSource);
313    if (index < 0) {
314        return input;
315    }
316    ssize_t idx = mInputs.indexOfKey(input);
317    InputDesc *inputDesc;
318    if (idx < 0) {
319        inputDesc = new InputDesc();
320        inputDesc->mSessionId = audioSession;
321        mInputs.add(input, inputDesc);
322    } else {
323        inputDesc = mInputs.valueAt(idx);
324    }
325
326    Vector <EffectDesc *> effects = mInputSources.valueAt(index)->mEffects;
327    for (size_t i = 0; i < effects.size(); i++) {
328        EffectDesc *effect = effects[i];
329        sp<AudioEffect> fx = new AudioEffect(NULL, &effect->mUuid, -1, 0, 0, audioSession, input);
330        status_t status = fx->initCheck();
331        if (status != NO_ERROR && status != ALREADY_EXISTS) {
332            ALOGW("Failed to create Fx %s on input %d", effect->mName, input);
333            // fx goes out of scope and strong ref on AudioEffect is released
334            continue;
335        }
336        for (size_t j = 0; j < effect->mParams.size(); j++) {
337            fx->setParameter(effect->mParams[j]);
338        }
339        inputDesc->mEffects.add(fx);
340    }
341    setPreProcessorEnabled(inputDesc, true);
342    return input;
343}
344
345status_t AudioPolicyService::startInput(audio_io_handle_t input)
346{
347    if (mpAudioPolicy == NULL) {
348        return NO_INIT;
349    }
350    Mutex::Autolock _l(mLock);
351
352    return mpAudioPolicy->start_input(mpAudioPolicy, input);
353}
354
355status_t AudioPolicyService::stopInput(audio_io_handle_t input)
356{
357    if (mpAudioPolicy == NULL) {
358        return NO_INIT;
359    }
360    Mutex::Autolock _l(mLock);
361
362    return mpAudioPolicy->stop_input(mpAudioPolicy, input);
363}
364
365void AudioPolicyService::releaseInput(audio_io_handle_t input)
366{
367    if (mpAudioPolicy == NULL) {
368        return;
369    }
370    Mutex::Autolock _l(mLock);
371    mpAudioPolicy->release_input(mpAudioPolicy, input);
372
373    ssize_t index = mInputs.indexOfKey(input);
374    if (index < 0) {
375        return;
376    }
377    InputDesc *inputDesc = mInputs.valueAt(index);
378    setPreProcessorEnabled(inputDesc, false);
379    inputDesc->mEffects.clear();
380    delete inputDesc;
381    mInputs.removeItemsAt(index);
382}
383
384status_t AudioPolicyService::initStreamVolume(audio_stream_type_t stream,
385                                            int indexMin,
386                                            int indexMax)
387{
388    if (mpAudioPolicy == NULL) {
389        return NO_INIT;
390    }
391    if (!checkPermission()) {
392        return PERMISSION_DENIED;
393    }
394    if (uint32_t(stream) >= AUDIO_STREAM_CNT) {
395        return BAD_VALUE;
396    }
397    mpAudioPolicy->init_stream_volume(mpAudioPolicy, stream, indexMin, indexMax);
398    return NO_ERROR;
399}
400
401status_t AudioPolicyService::setStreamVolumeIndex(audio_stream_type_t stream,
402                                                  int index,
403                                                  audio_devices_t device)
404{
405    if (mpAudioPolicy == NULL) {
406        return NO_INIT;
407    }
408    if (!checkPermission()) {
409        return PERMISSION_DENIED;
410    }
411    if (uint32_t(stream) >= AUDIO_STREAM_CNT) {
412        return BAD_VALUE;
413    }
414
415    if (mpAudioPolicy->set_stream_volume_index_for_device) {
416        return mpAudioPolicy->set_stream_volume_index_for_device(mpAudioPolicy,
417                                                                stream,
418                                                                index,
419                                                                device);
420    } else {
421        return mpAudioPolicy->set_stream_volume_index(mpAudioPolicy, stream, index);
422    }
423}
424
425status_t AudioPolicyService::getStreamVolumeIndex(audio_stream_type_t stream,
426                                                  int *index,
427                                                  audio_devices_t device)
428{
429    if (mpAudioPolicy == NULL) {
430        return NO_INIT;
431    }
432    if (uint32_t(stream) >= AUDIO_STREAM_CNT) {
433        return BAD_VALUE;
434    }
435    if (mpAudioPolicy->get_stream_volume_index_for_device) {
436        return mpAudioPolicy->get_stream_volume_index_for_device(mpAudioPolicy,
437                                                                stream,
438                                                                index,
439                                                                device);
440    } else {
441        return mpAudioPolicy->get_stream_volume_index(mpAudioPolicy, stream, index);
442    }
443}
444
445uint32_t AudioPolicyService::getStrategyForStream(audio_stream_type_t stream)
446{
447    if (mpAudioPolicy == NULL) {
448        return 0;
449    }
450    return mpAudioPolicy->get_strategy_for_stream(mpAudioPolicy, stream);
451}
452
453uint32_t AudioPolicyService::getDevicesForStream(audio_stream_type_t stream)
454{
455    if (mpAudioPolicy == NULL) {
456        return 0;
457    }
458    return mpAudioPolicy->get_devices_for_stream(mpAudioPolicy, stream);
459}
460
461audio_io_handle_t AudioPolicyService::getOutputForEffect(effect_descriptor_t *desc)
462{
463    if (mpAudioPolicy == NULL) {
464        return NO_INIT;
465    }
466    Mutex::Autolock _l(mLock);
467    return mpAudioPolicy->get_output_for_effect(mpAudioPolicy, desc);
468}
469
470status_t AudioPolicyService::registerEffect(effect_descriptor_t *desc,
471                                audio_io_handle_t io,
472                                uint32_t strategy,
473                                int session,
474                                int id)
475{
476    if (mpAudioPolicy == NULL) {
477        return NO_INIT;
478    }
479    return mpAudioPolicy->register_effect(mpAudioPolicy, desc, io, strategy, session, id);
480}
481
482status_t AudioPolicyService::unregisterEffect(int id)
483{
484    if (mpAudioPolicy == NULL) {
485        return NO_INIT;
486    }
487    return mpAudioPolicy->unregister_effect(mpAudioPolicy, id);
488}
489
490status_t AudioPolicyService::setEffectEnabled(int id, bool enabled)
491{
492    if (mpAudioPolicy == NULL) {
493        return NO_INIT;
494    }
495    return mpAudioPolicy->set_effect_enabled(mpAudioPolicy, id, enabled);
496}
497
498bool AudioPolicyService::isStreamActive(audio_stream_type_t stream, uint32_t inPastMs) const
499{
500    if (mpAudioPolicy == NULL) {
501        return 0;
502    }
503    Mutex::Autolock _l(mLock);
504    return mpAudioPolicy->is_stream_active(mpAudioPolicy, stream, inPastMs);
505}
506
507status_t AudioPolicyService::queryDefaultPreProcessing(int audioSession,
508                                                       effect_descriptor_t *descriptors,
509                                                       uint32_t *count)
510{
511
512    if (mpAudioPolicy == NULL) {
513        *count = 0;
514        return NO_INIT;
515    }
516    Mutex::Autolock _l(mLock);
517    status_t status = NO_ERROR;
518
519    size_t index;
520    for (index = 0; index < mInputs.size(); index++) {
521        if (mInputs.valueAt(index)->mSessionId == audioSession) {
522            break;
523        }
524    }
525    if (index == mInputs.size()) {
526        *count = 0;
527        return BAD_VALUE;
528    }
529    Vector< sp<AudioEffect> > effects = mInputs.valueAt(index)->mEffects;
530
531    for (size_t i = 0; i < effects.size(); i++) {
532        effect_descriptor_t desc = effects[i]->descriptor();
533        if (i < *count) {
534            memcpy(descriptors + i, &desc, sizeof(effect_descriptor_t));
535        }
536    }
537    if (effects.size() > *count) {
538        status = NO_MEMORY;
539    }
540    *count = effects.size();
541    return status;
542}
543
544void AudioPolicyService::binderDied(const wp<IBinder>& who) {
545    ALOGW("binderDied() %p, tid %d, calling tid %d", who.unsafe_get(), gettid(),
546            IPCThreadState::self()->getCallingPid());
547}
548
549static bool tryLock(Mutex& mutex)
550{
551    bool locked = false;
552    for (int i = 0; i < kDumpLockRetries; ++i) {
553        if (mutex.tryLock() == NO_ERROR) {
554            locked = true;
555            break;
556        }
557        usleep(kDumpLockSleepUs);
558    }
559    return locked;
560}
561
562status_t AudioPolicyService::dumpInternals(int fd)
563{
564    const size_t SIZE = 256;
565    char buffer[SIZE];
566    String8 result;
567
568    snprintf(buffer, SIZE, "PolicyManager Interface: %p\n", mpAudioPolicy);
569    result.append(buffer);
570    snprintf(buffer, SIZE, "Command Thread: %p\n", mAudioCommandThread.get());
571    result.append(buffer);
572    snprintf(buffer, SIZE, "Tones Thread: %p\n", mTonePlaybackThread.get());
573    result.append(buffer);
574
575    write(fd, result.string(), result.size());
576    return NO_ERROR;
577}
578
579status_t AudioPolicyService::dump(int fd, const Vector<String16>& args)
580{
581    if (!checkCallingPermission(String16("android.permission.DUMP"))) {
582        dumpPermissionDenial(fd);
583    } else {
584        bool locked = tryLock(mLock);
585        if (!locked) {
586            String8 result(kDeadlockedString);
587            write(fd, result.string(), result.size());
588        }
589
590        dumpInternals(fd);
591        if (mAudioCommandThread != NULL) {
592            mAudioCommandThread->dump(fd);
593        }
594        if (mTonePlaybackThread != NULL) {
595            mTonePlaybackThread->dump(fd);
596        }
597
598        if (mpAudioPolicy) {
599            mpAudioPolicy->dump(mpAudioPolicy, fd);
600        }
601
602        if (locked) mLock.unlock();
603    }
604    return NO_ERROR;
605}
606
607status_t AudioPolicyService::dumpPermissionDenial(int fd)
608{
609    const size_t SIZE = 256;
610    char buffer[SIZE];
611    String8 result;
612    snprintf(buffer, SIZE, "Permission Denial: "
613            "can't dump AudioPolicyService from pid=%d, uid=%d\n",
614            IPCThreadState::self()->getCallingPid(),
615            IPCThreadState::self()->getCallingUid());
616    result.append(buffer);
617    write(fd, result.string(), result.size());
618    return NO_ERROR;
619}
620
621void AudioPolicyService::setPreProcessorEnabled(InputDesc *inputDesc, bool enabled)
622{
623    Vector<sp<AudioEffect> > fxVector = inputDesc->mEffects;
624    for (size_t i = 0; i < fxVector.size(); i++) {
625        sp<AudioEffect> fx = fxVector.itemAt(i);
626        fx->setEnabled(enabled);
627    }
628}
629
630status_t AudioPolicyService::onTransact(
631        uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
632{
633    return BnAudioPolicyService::onTransact(code, data, reply, flags);
634}
635
636
637// -----------  AudioPolicyService::AudioCommandThread implementation ----------
638
639AudioPolicyService::AudioCommandThread::AudioCommandThread(String8 name)
640    : Thread(false), mName(name)
641{
642    mpToneGenerator = NULL;
643}
644
645
646AudioPolicyService::AudioCommandThread::~AudioCommandThread()
647{
648    if (mName != "" && !mAudioCommands.isEmpty()) {
649        release_wake_lock(mName.string());
650    }
651    mAudioCommands.clear();
652    delete mpToneGenerator;
653}
654
655void AudioPolicyService::AudioCommandThread::onFirstRef()
656{
657    if (mName != "") {
658        run(mName.string(), ANDROID_PRIORITY_AUDIO);
659    } else {
660        run("AudioCommandThread", ANDROID_PRIORITY_AUDIO);
661    }
662}
663
664bool AudioPolicyService::AudioCommandThread::threadLoop()
665{
666    nsecs_t waitTime = INT64_MAX;
667
668    mLock.lock();
669    while (!exitPending())
670    {
671        while(!mAudioCommands.isEmpty()) {
672            nsecs_t curTime = systemTime();
673            // commands are sorted by increasing time stamp: execute them from index 0 and up
674            if (mAudioCommands[0]->mTime <= curTime) {
675                AudioCommand *command = mAudioCommands[0];
676                mAudioCommands.removeAt(0);
677                mLastCommand = *command;
678
679                switch (command->mCommand) {
680                case START_TONE: {
681                    mLock.unlock();
682                    ToneData *data = (ToneData *)command->mParam;
683                    ALOGV("AudioCommandThread() processing start tone %d on stream %d",
684                            data->mType, data->mStream);
685                    delete mpToneGenerator;
686                    mpToneGenerator = new ToneGenerator(data->mStream, 1.0);
687                    mpToneGenerator->startTone(data->mType);
688                    delete data;
689                    mLock.lock();
690                    }break;
691                case STOP_TONE: {
692                    mLock.unlock();
693                    ALOGV("AudioCommandThread() processing stop tone");
694                    if (mpToneGenerator != NULL) {
695                        mpToneGenerator->stopTone();
696                        delete mpToneGenerator;
697                        mpToneGenerator = NULL;
698                    }
699                    mLock.lock();
700                    }break;
701                case SET_VOLUME: {
702                    VolumeData *data = (VolumeData *)command->mParam;
703                    ALOGV("AudioCommandThread() processing set volume stream %d, \
704                            volume %f, output %d", data->mStream, data->mVolume, data->mIO);
705                    command->mStatus = AudioSystem::setStreamVolume(data->mStream,
706                                                                    data->mVolume,
707                                                                    data->mIO);
708                    if (command->mWaitStatus) {
709                        command->mCond.signal();
710                        mWaitWorkCV.wait(mLock);
711                    }
712                    delete data;
713                    }break;
714                case SET_PARAMETERS: {
715                     ParametersData *data = (ParametersData *)command->mParam;
716                     ALOGV("AudioCommandThread() processing set parameters string %s, io %d",
717                             data->mKeyValuePairs.string(), data->mIO);
718                     command->mStatus = AudioSystem::setParameters(data->mIO, data->mKeyValuePairs);
719                     if (command->mWaitStatus) {
720                         command->mCond.signal();
721                         mWaitWorkCV.wait(mLock);
722                     }
723                     delete data;
724                     }break;
725                case SET_VOICE_VOLUME: {
726                    VoiceVolumeData *data = (VoiceVolumeData *)command->mParam;
727                    ALOGV("AudioCommandThread() processing set voice volume volume %f",
728                            data->mVolume);
729                    command->mStatus = AudioSystem::setVoiceVolume(data->mVolume);
730                    if (command->mWaitStatus) {
731                        command->mCond.signal();
732                        mWaitWorkCV.wait(mLock);
733                    }
734                    delete data;
735                    }break;
736                default:
737                    ALOGW("AudioCommandThread() unknown command %d", command->mCommand);
738                }
739                delete command;
740                waitTime = INT64_MAX;
741            } else {
742                waitTime = mAudioCommands[0]->mTime - curTime;
743                break;
744            }
745        }
746        // release delayed commands wake lock
747        if (mName != "" && mAudioCommands.isEmpty()) {
748            release_wake_lock(mName.string());
749        }
750        ALOGV("AudioCommandThread() going to sleep");
751        mWaitWorkCV.waitRelative(mLock, waitTime);
752        ALOGV("AudioCommandThread() waking up");
753    }
754    mLock.unlock();
755    return false;
756}
757
758status_t AudioPolicyService::AudioCommandThread::dump(int fd)
759{
760    const size_t SIZE = 256;
761    char buffer[SIZE];
762    String8 result;
763
764    snprintf(buffer, SIZE, "AudioCommandThread %p Dump\n", this);
765    result.append(buffer);
766    write(fd, result.string(), result.size());
767
768    bool locked = tryLock(mLock);
769    if (!locked) {
770        String8 result2(kCmdDeadlockedString);
771        write(fd, result2.string(), result2.size());
772    }
773
774    snprintf(buffer, SIZE, "- Commands:\n");
775    result = String8(buffer);
776    result.append("   Command Time        Wait pParam\n");
777    for (int i = 0; i < (int)mAudioCommands.size(); i++) {
778        mAudioCommands[i]->dump(buffer, SIZE);
779        result.append(buffer);
780    }
781    result.append("  Last Command\n");
782    mLastCommand.dump(buffer, SIZE);
783    result.append(buffer);
784
785    write(fd, result.string(), result.size());
786
787    if (locked) mLock.unlock();
788
789    return NO_ERROR;
790}
791
792void AudioPolicyService::AudioCommandThread::startToneCommand(int type, audio_stream_type_t stream)
793{
794    AudioCommand *command = new AudioCommand();
795    command->mCommand = START_TONE;
796    ToneData *data = new ToneData();
797    data->mType = type;
798    data->mStream = stream;
799    command->mParam = (void *)data;
800    command->mWaitStatus = false;
801    Mutex::Autolock _l(mLock);
802    insertCommand_l(command);
803    ALOGV("AudioCommandThread() adding tone start type %d, stream %d", type, stream);
804    mWaitWorkCV.signal();
805}
806
807void AudioPolicyService::AudioCommandThread::stopToneCommand()
808{
809    AudioCommand *command = new AudioCommand();
810    command->mCommand = STOP_TONE;
811    command->mParam = NULL;
812    command->mWaitStatus = false;
813    Mutex::Autolock _l(mLock);
814    insertCommand_l(command);
815    ALOGV("AudioCommandThread() adding tone stop");
816    mWaitWorkCV.signal();
817}
818
819status_t AudioPolicyService::AudioCommandThread::volumeCommand(audio_stream_type_t stream,
820                                                               float volume,
821                                                               int output,
822                                                               int delayMs)
823{
824    status_t status = NO_ERROR;
825
826    AudioCommand *command = new AudioCommand();
827    command->mCommand = SET_VOLUME;
828    VolumeData *data = new VolumeData();
829    data->mStream = stream;
830    data->mVolume = volume;
831    data->mIO = output;
832    command->mParam = data;
833    if (delayMs == 0) {
834        command->mWaitStatus = true;
835    } else {
836        command->mWaitStatus = false;
837    }
838    Mutex::Autolock _l(mLock);
839    insertCommand_l(command, delayMs);
840    ALOGV("AudioCommandThread() adding set volume stream %d, volume %f, output %d",
841            stream, volume, output);
842    mWaitWorkCV.signal();
843    if (command->mWaitStatus) {
844        command->mCond.wait(mLock);
845        status =  command->mStatus;
846        mWaitWorkCV.signal();
847    }
848    return status;
849}
850
851status_t AudioPolicyService::AudioCommandThread::parametersCommand(int ioHandle,
852                                                                   const char *keyValuePairs,
853                                                                   int delayMs)
854{
855    status_t status = NO_ERROR;
856
857    AudioCommand *command = new AudioCommand();
858    command->mCommand = SET_PARAMETERS;
859    ParametersData *data = new ParametersData();
860    data->mIO = ioHandle;
861    data->mKeyValuePairs = String8(keyValuePairs);
862    command->mParam = data;
863    if (delayMs == 0) {
864        command->mWaitStatus = true;
865    } else {
866        command->mWaitStatus = false;
867    }
868    Mutex::Autolock _l(mLock);
869    insertCommand_l(command, delayMs);
870    ALOGV("AudioCommandThread() adding set parameter string %s, io %d ,delay %d",
871            keyValuePairs, ioHandle, delayMs);
872    mWaitWorkCV.signal();
873    if (command->mWaitStatus) {
874        command->mCond.wait(mLock);
875        status =  command->mStatus;
876        mWaitWorkCV.signal();
877    }
878    return status;
879}
880
881status_t AudioPolicyService::AudioCommandThread::voiceVolumeCommand(float volume, int delayMs)
882{
883    status_t status = NO_ERROR;
884
885    AudioCommand *command = new AudioCommand();
886    command->mCommand = SET_VOICE_VOLUME;
887    VoiceVolumeData *data = new VoiceVolumeData();
888    data->mVolume = volume;
889    command->mParam = data;
890    if (delayMs == 0) {
891        command->mWaitStatus = true;
892    } else {
893        command->mWaitStatus = false;
894    }
895    Mutex::Autolock _l(mLock);
896    insertCommand_l(command, delayMs);
897    ALOGV("AudioCommandThread() adding set voice volume volume %f", volume);
898    mWaitWorkCV.signal();
899    if (command->mWaitStatus) {
900        command->mCond.wait(mLock);
901        status =  command->mStatus;
902        mWaitWorkCV.signal();
903    }
904    return status;
905}
906
907// insertCommand_l() must be called with mLock held
908void AudioPolicyService::AudioCommandThread::insertCommand_l(AudioCommand *command, int delayMs)
909{
910    ssize_t i;
911    Vector <AudioCommand *> removedCommands;
912
913    command->mTime = systemTime() + milliseconds(delayMs);
914
915    // acquire wake lock to make sure delayed commands are processed
916    if (mName != "" && mAudioCommands.isEmpty()) {
917        acquire_wake_lock(PARTIAL_WAKE_LOCK, mName.string());
918    }
919
920    // check same pending commands with later time stamps and eliminate them
921    for (i = mAudioCommands.size()-1; i >= 0; i--) {
922        AudioCommand *command2 = mAudioCommands[i];
923        // commands are sorted by increasing time stamp: no need to scan the rest of mAudioCommands
924        if (command2->mTime <= command->mTime) break;
925        if (command2->mCommand != command->mCommand) continue;
926
927        switch (command->mCommand) {
928        case SET_PARAMETERS: {
929            ParametersData *data = (ParametersData *)command->mParam;
930            ParametersData *data2 = (ParametersData *)command2->mParam;
931            if (data->mIO != data2->mIO) break;
932            ALOGV("Comparing parameter command %s to new command %s",
933                    data2->mKeyValuePairs.string(), data->mKeyValuePairs.string());
934            AudioParameter param = AudioParameter(data->mKeyValuePairs);
935            AudioParameter param2 = AudioParameter(data2->mKeyValuePairs);
936            for (size_t j = 0; j < param.size(); j++) {
937               String8 key;
938               String8 value;
939               param.getAt(j, key, value);
940               for (size_t k = 0; k < param2.size(); k++) {
941                  String8 key2;
942                  String8 value2;
943                  param2.getAt(k, key2, value2);
944                  if (key2 == key) {
945                      param2.remove(key2);
946                      ALOGV("Filtering out parameter %s", key2.string());
947                      break;
948                  }
949               }
950            }
951            // if all keys have been filtered out, remove the command.
952            // otherwise, update the key value pairs
953            if (param2.size() == 0) {
954                removedCommands.add(command2);
955            } else {
956                data2->mKeyValuePairs = param2.toString();
957            }
958        } break;
959
960        case SET_VOLUME: {
961            VolumeData *data = (VolumeData *)command->mParam;
962            VolumeData *data2 = (VolumeData *)command2->mParam;
963            if (data->mIO != data2->mIO) break;
964            if (data->mStream != data2->mStream) break;
965            ALOGV("Filtering out volume command on output %d for stream %d",
966                    data->mIO, data->mStream);
967            removedCommands.add(command2);
968        } break;
969        case START_TONE:
970        case STOP_TONE:
971        default:
972            break;
973        }
974    }
975
976    // remove filtered commands
977    for (size_t j = 0; j < removedCommands.size(); j++) {
978        // removed commands always have time stamps greater than current command
979        for (size_t k = i + 1; k < mAudioCommands.size(); k++) {
980            if (mAudioCommands[k] == removedCommands[j]) {
981                ALOGV("suppressing command: %d", mAudioCommands[k]->mCommand);
982                mAudioCommands.removeAt(k);
983                break;
984            }
985        }
986    }
987    removedCommands.clear();
988
989    // insert command at the right place according to its time stamp
990    ALOGV("inserting command: %d at index %d, num commands %d",
991            command->mCommand, (int)i+1, mAudioCommands.size());
992    mAudioCommands.insertAt(command, i + 1);
993}
994
995void AudioPolicyService::AudioCommandThread::exit()
996{
997    ALOGV("AudioCommandThread::exit");
998    {
999        AutoMutex _l(mLock);
1000        requestExit();
1001        mWaitWorkCV.signal();
1002    }
1003    requestExitAndWait();
1004}
1005
1006void AudioPolicyService::AudioCommandThread::AudioCommand::dump(char* buffer, size_t size)
1007{
1008    snprintf(buffer, size, "   %02d      %06d.%03d  %01u    %p\n",
1009            mCommand,
1010            (int)ns2s(mTime),
1011            (int)ns2ms(mTime)%1000,
1012            mWaitStatus,
1013            mParam);
1014}
1015
1016/******* helpers for the service_ops callbacks defined below *********/
1017void AudioPolicyService::setParameters(audio_io_handle_t ioHandle,
1018                                       const char *keyValuePairs,
1019                                       int delayMs)
1020{
1021    mAudioCommandThread->parametersCommand((int)ioHandle, keyValuePairs,
1022                                           delayMs);
1023}
1024
1025int AudioPolicyService::setStreamVolume(audio_stream_type_t stream,
1026                                        float volume,
1027                                        audio_io_handle_t output,
1028                                        int delayMs)
1029{
1030    return (int)mAudioCommandThread->volumeCommand(stream, volume,
1031                                                   (int)output, delayMs);
1032}
1033
1034int AudioPolicyService::startTone(audio_policy_tone_t tone,
1035                                  audio_stream_type_t stream)
1036{
1037    if (tone != AUDIO_POLICY_TONE_IN_CALL_NOTIFICATION)
1038        ALOGE("startTone: illegal tone requested (%d)", tone);
1039    if (stream != AUDIO_STREAM_VOICE_CALL)
1040        ALOGE("startTone: illegal stream (%d) requested for tone %d", stream,
1041             tone);
1042    mTonePlaybackThread->startToneCommand(ToneGenerator::TONE_SUP_CALL_WAITING,
1043                                          AUDIO_STREAM_VOICE_CALL);
1044    return 0;
1045}
1046
1047int AudioPolicyService::stopTone()
1048{
1049    mTonePlaybackThread->stopToneCommand();
1050    return 0;
1051}
1052
1053int AudioPolicyService::setVoiceVolume(float volume, int delayMs)
1054{
1055    return (int)mAudioCommandThread->voiceVolumeCommand(volume, delayMs);
1056}
1057
1058// ----------------------------------------------------------------------------
1059// Audio pre-processing configuration
1060// ----------------------------------------------------------------------------
1061
1062/*static*/ const char * const AudioPolicyService::kInputSourceNames[AUDIO_SOURCE_CNT -1] = {
1063    MIC_SRC_TAG,
1064    VOICE_UL_SRC_TAG,
1065    VOICE_DL_SRC_TAG,
1066    VOICE_CALL_SRC_TAG,
1067    CAMCORDER_SRC_TAG,
1068    VOICE_REC_SRC_TAG,
1069    VOICE_COMM_SRC_TAG
1070};
1071
1072// returns the audio_source_t enum corresponding to the input source name or
1073// AUDIO_SOURCE_CNT is no match found
1074audio_source_t AudioPolicyService::inputSourceNameToEnum(const char *name)
1075{
1076    int i;
1077    for (i = AUDIO_SOURCE_MIC; i < AUDIO_SOURCE_CNT; i++) {
1078        if (strcmp(name, kInputSourceNames[i - AUDIO_SOURCE_MIC]) == 0) {
1079            ALOGV("inputSourceNameToEnum found source %s %d", name, i);
1080            break;
1081        }
1082    }
1083    return (audio_source_t)i;
1084}
1085
1086size_t AudioPolicyService::growParamSize(char *param,
1087                                         size_t size,
1088                                         size_t *curSize,
1089                                         size_t *totSize)
1090{
1091    // *curSize is at least sizeof(effect_param_t) + 2 * sizeof(int)
1092    size_t pos = ((*curSize - 1 ) / size + 1) * size;
1093
1094    if (pos + size > *totSize) {
1095        while (pos + size > *totSize) {
1096            *totSize += ((*totSize + 7) / 8) * 4;
1097        }
1098        param = (char *)realloc(param, *totSize);
1099    }
1100    *curSize = pos + size;
1101    return pos;
1102}
1103
1104size_t AudioPolicyService::readParamValue(cnode *node,
1105                                          char *param,
1106                                          size_t *curSize,
1107                                          size_t *totSize)
1108{
1109    if (strncmp(node->name, SHORT_TAG, sizeof(SHORT_TAG) + 1) == 0) {
1110        size_t pos = growParamSize(param, sizeof(short), curSize, totSize);
1111        *(short *)((char *)param + pos) = (short)atoi(node->value);
1112        ALOGV("readParamValue() reading short %d", *(short *)((char *)param + pos));
1113        return sizeof(short);
1114    } else if (strncmp(node->name, INT_TAG, sizeof(INT_TAG) + 1) == 0) {
1115        size_t pos = growParamSize(param, sizeof(int), curSize, totSize);
1116        *(int *)((char *)param + pos) = atoi(node->value);
1117        ALOGV("readParamValue() reading int %d", *(int *)((char *)param + pos));
1118        return sizeof(int);
1119    } else if (strncmp(node->name, FLOAT_TAG, sizeof(FLOAT_TAG) + 1) == 0) {
1120        size_t pos = growParamSize(param, sizeof(float), curSize, totSize);
1121        *(float *)((char *)param + pos) = (float)atof(node->value);
1122        ALOGV("readParamValue() reading float %f",*(float *)((char *)param + pos));
1123        return sizeof(float);
1124    } else if (strncmp(node->name, BOOL_TAG, sizeof(BOOL_TAG) + 1) == 0) {
1125        size_t pos = growParamSize(param, sizeof(bool), curSize, totSize);
1126        if (strncmp(node->value, "false", strlen("false") + 1) == 0) {
1127            *(bool *)((char *)param + pos) = false;
1128        } else {
1129            *(bool *)((char *)param + pos) = true;
1130        }
1131        ALOGV("readParamValue() reading bool %s",*(bool *)((char *)param + pos) ? "true" : "false");
1132        return sizeof(bool);
1133    } else if (strncmp(node->name, STRING_TAG, sizeof(STRING_TAG) + 1) == 0) {
1134        size_t len = strnlen(node->value, EFFECT_STRING_LEN_MAX);
1135        if (*curSize + len + 1 > *totSize) {
1136            *totSize = *curSize + len + 1;
1137            param = (char *)realloc(param, *totSize);
1138        }
1139        strncpy(param + *curSize, node->value, len);
1140        *curSize += len;
1141        param[*curSize] = '\0';
1142        ALOGV("readParamValue() reading string %s", param + *curSize - len);
1143        return len;
1144    }
1145    ALOGW("readParamValue() unknown param type %s", node->name);
1146    return 0;
1147}
1148
1149effect_param_t *AudioPolicyService::loadEffectParameter(cnode *root)
1150{
1151    cnode *param;
1152    cnode *value;
1153    size_t curSize = sizeof(effect_param_t);
1154    size_t totSize = sizeof(effect_param_t) + 2 * sizeof(int);
1155    effect_param_t *fx_param = (effect_param_t *)malloc(totSize);
1156
1157    param = config_find(root, PARAM_TAG);
1158    value = config_find(root, VALUE_TAG);
1159    if (param == NULL && value == NULL) {
1160        // try to parse simple parameter form {int int}
1161        param = root->first_child;
1162        if (param != NULL) {
1163            // Note: that a pair of random strings is read as 0 0
1164            int *ptr = (int *)fx_param->data;
1165            int *ptr2 = (int *)((char *)param + sizeof(effect_param_t));
1166            ALOGW("loadEffectParameter() ptr %p ptr2 %p", ptr, ptr2);
1167            *ptr++ = atoi(param->name);
1168            *ptr = atoi(param->value);
1169            fx_param->psize = sizeof(int);
1170            fx_param->vsize = sizeof(int);
1171            return fx_param;
1172        }
1173    }
1174    if (param == NULL || value == NULL) {
1175        ALOGW("loadEffectParameter() invalid parameter description %s", root->name);
1176        goto error;
1177    }
1178
1179    fx_param->psize = 0;
1180    param = param->first_child;
1181    while (param) {
1182        ALOGV("loadEffectParameter() reading param of type %s", param->name);
1183        size_t size = readParamValue(param, (char *)fx_param, &curSize, &totSize);
1184        if (size == 0) {
1185            goto error;
1186        }
1187        fx_param->psize += size;
1188        param = param->next;
1189    }
1190
1191    // align start of value field on 32 bit boundary
1192    curSize = ((curSize - 1 ) / sizeof(int) + 1) * sizeof(int);
1193
1194    fx_param->vsize = 0;
1195    value = value->first_child;
1196    while (value) {
1197        ALOGV("loadEffectParameter() reading value of type %s", value->name);
1198        size_t size = readParamValue(value, (char *)fx_param, &curSize, &totSize);
1199        if (size == 0) {
1200            goto error;
1201        }
1202        fx_param->vsize += size;
1203        value = value->next;
1204    }
1205
1206    return fx_param;
1207
1208error:
1209    delete fx_param;
1210    return NULL;
1211}
1212
1213void AudioPolicyService::loadEffectParameters(cnode *root, Vector <effect_param_t *>& params)
1214{
1215    cnode *node = root->first_child;
1216    while (node) {
1217        ALOGV("loadEffectParameters() loading param %s", node->name);
1218        effect_param_t *param = loadEffectParameter(node);
1219        if (param == NULL) {
1220            node = node->next;
1221            continue;
1222        }
1223        params.add(param);
1224        node = node->next;
1225    }
1226}
1227
1228AudioPolicyService::InputSourceDesc *AudioPolicyService::loadInputSource(
1229                                                            cnode *root,
1230                                                            const Vector <EffectDesc *>& effects)
1231{
1232    cnode *node = root->first_child;
1233    if (node == NULL) {
1234        ALOGW("loadInputSource() empty element %s", root->name);
1235        return NULL;
1236    }
1237    InputSourceDesc *source = new InputSourceDesc();
1238    while (node) {
1239        size_t i;
1240        for (i = 0; i < effects.size(); i++) {
1241            if (strncmp(effects[i]->mName, node->name, EFFECT_STRING_LEN_MAX) == 0) {
1242                ALOGV("loadInputSource() found effect %s in list", node->name);
1243                break;
1244            }
1245        }
1246        if (i == effects.size()) {
1247            ALOGV("loadInputSource() effect %s not in list", node->name);
1248            node = node->next;
1249            continue;
1250        }
1251        EffectDesc *effect = new EffectDesc(*effects[i]);
1252        loadEffectParameters(node, effect->mParams);
1253        ALOGV("loadInputSource() adding effect %s uuid %08x", effect->mName, effect->mUuid.timeLow);
1254        source->mEffects.add(effect);
1255        node = node->next;
1256    }
1257    if (source->mEffects.size() == 0) {
1258        ALOGW("loadInputSource() no valid effects found in source %s", root->name);
1259        delete source;
1260        return NULL;
1261    }
1262    return source;
1263}
1264
1265status_t AudioPolicyService::loadInputSources(cnode *root, const Vector <EffectDesc *>& effects)
1266{
1267    cnode *node = config_find(root, PREPROCESSING_TAG);
1268    if (node == NULL) {
1269        return -ENOENT;
1270    }
1271    node = node->first_child;
1272    while (node) {
1273        audio_source_t source = inputSourceNameToEnum(node->name);
1274        if (source == AUDIO_SOURCE_CNT) {
1275            ALOGW("loadInputSources() invalid input source %s", node->name);
1276            node = node->next;
1277            continue;
1278        }
1279        ALOGV("loadInputSources() loading input source %s", node->name);
1280        InputSourceDesc *desc = loadInputSource(node, effects);
1281        if (desc == NULL) {
1282            node = node->next;
1283            continue;
1284        }
1285        mInputSources.add(source, desc);
1286        node = node->next;
1287    }
1288    return NO_ERROR;
1289}
1290
1291AudioPolicyService::EffectDesc *AudioPolicyService::loadEffect(cnode *root)
1292{
1293    cnode *node = config_find(root, UUID_TAG);
1294    if (node == NULL) {
1295        return NULL;
1296    }
1297    effect_uuid_t uuid;
1298    if (AudioEffect::stringToGuid(node->value, &uuid) != NO_ERROR) {
1299        ALOGW("loadEffect() invalid uuid %s", node->value);
1300        return NULL;
1301    }
1302    EffectDesc *effect = new EffectDesc();
1303    effect->mName = strdup(root->name);
1304    memcpy(&effect->mUuid, &uuid, sizeof(effect_uuid_t));
1305
1306    return effect;
1307}
1308
1309status_t AudioPolicyService::loadEffects(cnode *root, Vector <EffectDesc *>& effects)
1310{
1311    cnode *node = config_find(root, EFFECTS_TAG);
1312    if (node == NULL) {
1313        return -ENOENT;
1314    }
1315    node = node->first_child;
1316    while (node) {
1317        ALOGV("loadEffects() loading effect %s", node->name);
1318        EffectDesc *effect = loadEffect(node);
1319        if (effect == NULL) {
1320            node = node->next;
1321            continue;
1322        }
1323        effects.add(effect);
1324        node = node->next;
1325    }
1326    return NO_ERROR;
1327}
1328
1329status_t AudioPolicyService::loadPreProcessorConfig(const char *path)
1330{
1331    cnode *root;
1332    char *data;
1333
1334    data = (char *)load_file(path, NULL);
1335    if (data == NULL) {
1336        return -ENODEV;
1337    }
1338    root = config_node("", "");
1339    config_load(root, data);
1340
1341    Vector <EffectDesc *> effects;
1342    loadEffects(root, effects);
1343    loadInputSources(root, effects);
1344
1345    config_free(root);
1346    free(root);
1347    free(data);
1348
1349    return NO_ERROR;
1350}
1351
1352/* implementation of the interface to the policy manager */
1353extern "C" {
1354
1355static audio_io_handle_t aps_open_output(void *service,
1356                                             uint32_t *pDevices,
1357                                             uint32_t *pSamplingRate,
1358                                             audio_format_t *pFormat,
1359                                             uint32_t *pChannels,
1360                                             uint32_t *pLatencyMs,
1361                                             audio_policy_output_flags_t flags)
1362{
1363    sp<IAudioFlinger> af = AudioSystem::get_audio_flinger();
1364    if (af == NULL) {
1365        ALOGW("%s: could not get AudioFlinger", __func__);
1366        return 0;
1367    }
1368
1369    return af->openOutput(pDevices, pSamplingRate, pFormat, pChannels,
1370                          pLatencyMs, flags);
1371}
1372
1373static audio_io_handle_t aps_open_dup_output(void *service,
1374                                                 audio_io_handle_t output1,
1375                                                 audio_io_handle_t output2)
1376{
1377    sp<IAudioFlinger> af = AudioSystem::get_audio_flinger();
1378    if (af == NULL) {
1379        ALOGW("%s: could not get AudioFlinger", __func__);
1380        return 0;
1381    }
1382    return af->openDuplicateOutput(output1, output2);
1383}
1384
1385static int aps_close_output(void *service, audio_io_handle_t output)
1386{
1387    sp<IAudioFlinger> af = AudioSystem::get_audio_flinger();
1388    if (af == NULL)
1389        return PERMISSION_DENIED;
1390
1391    return af->closeOutput(output);
1392}
1393
1394static int aps_suspend_output(void *service, audio_io_handle_t output)
1395{
1396    sp<IAudioFlinger> af = AudioSystem::get_audio_flinger();
1397    if (af == NULL) {
1398        ALOGW("%s: could not get AudioFlinger", __func__);
1399        return PERMISSION_DENIED;
1400    }
1401
1402    return af->suspendOutput(output);
1403}
1404
1405static int aps_restore_output(void *service, audio_io_handle_t output)
1406{
1407    sp<IAudioFlinger> af = AudioSystem::get_audio_flinger();
1408    if (af == NULL) {
1409        ALOGW("%s: could not get AudioFlinger", __func__);
1410        return PERMISSION_DENIED;
1411    }
1412
1413    return af->restoreOutput(output);
1414}
1415
1416static audio_io_handle_t aps_open_input(void *service,
1417                                            uint32_t *pDevices,
1418                                            uint32_t *pSamplingRate,
1419                                            audio_format_t *pFormat,
1420                                            uint32_t *pChannels,
1421                                            uint32_t acoustics)
1422{
1423    sp<IAudioFlinger> af = AudioSystem::get_audio_flinger();
1424    if (af == NULL) {
1425        ALOGW("%s: could not get AudioFlinger", __func__);
1426        return 0;
1427    }
1428
1429    return af->openInput(pDevices, pSamplingRate, pFormat, pChannels,
1430                         acoustics);
1431}
1432
1433static int aps_close_input(void *service, audio_io_handle_t input)
1434{
1435    sp<IAudioFlinger> af = AudioSystem::get_audio_flinger();
1436    if (af == NULL)
1437        return PERMISSION_DENIED;
1438
1439    return af->closeInput(input);
1440}
1441
1442static int aps_set_stream_output(void *service, audio_stream_type_t stream,
1443                                     audio_io_handle_t output)
1444{
1445    sp<IAudioFlinger> af = AudioSystem::get_audio_flinger();
1446    if (af == NULL)
1447        return PERMISSION_DENIED;
1448
1449    return af->setStreamOutput(stream, output);
1450}
1451
1452static int aps_move_effects(void *service, int session,
1453                                audio_io_handle_t src_output,
1454                                audio_io_handle_t dst_output)
1455{
1456    sp<IAudioFlinger> af = AudioSystem::get_audio_flinger();
1457    if (af == NULL)
1458        return PERMISSION_DENIED;
1459
1460    return af->moveEffects(session, (int)src_output, (int)dst_output);
1461}
1462
1463static char * aps_get_parameters(void *service, audio_io_handle_t io_handle,
1464                                     const char *keys)
1465{
1466    String8 result = AudioSystem::getParameters(io_handle, String8(keys));
1467    return strdup(result.string());
1468}
1469
1470static void aps_set_parameters(void *service, audio_io_handle_t io_handle,
1471                                   const char *kv_pairs, int delay_ms)
1472{
1473    AudioPolicyService *audioPolicyService = (AudioPolicyService *)service;
1474
1475    audioPolicyService->setParameters(io_handle, kv_pairs, delay_ms);
1476}
1477
1478static int aps_set_stream_volume(void *service, audio_stream_type_t stream,
1479                                     float volume, audio_io_handle_t output,
1480                                     int delay_ms)
1481{
1482    AudioPolicyService *audioPolicyService = (AudioPolicyService *)service;
1483
1484    return audioPolicyService->setStreamVolume(stream, volume, output,
1485                                               delay_ms);
1486}
1487
1488static int aps_start_tone(void *service, audio_policy_tone_t tone,
1489                              audio_stream_type_t stream)
1490{
1491    AudioPolicyService *audioPolicyService = (AudioPolicyService *)service;
1492
1493    return audioPolicyService->startTone(tone, stream);
1494}
1495
1496static int aps_stop_tone(void *service)
1497{
1498    AudioPolicyService *audioPolicyService = (AudioPolicyService *)service;
1499
1500    return audioPolicyService->stopTone();
1501}
1502
1503static int aps_set_voice_volume(void *service, float volume, int delay_ms)
1504{
1505    AudioPolicyService *audioPolicyService = (AudioPolicyService *)service;
1506
1507    return audioPolicyService->setVoiceVolume(volume, delay_ms);
1508}
1509
1510}; // extern "C"
1511
1512namespace {
1513    struct audio_policy_service_ops aps_ops = {
1514        open_output           : aps_open_output,
1515        open_duplicate_output : aps_open_dup_output,
1516        close_output          : aps_close_output,
1517        suspend_output        : aps_suspend_output,
1518        restore_output        : aps_restore_output,
1519        open_input            : aps_open_input,
1520        close_input           : aps_close_input,
1521        set_stream_volume     : aps_set_stream_volume,
1522        set_stream_output     : aps_set_stream_output,
1523        set_parameters        : aps_set_parameters,
1524        get_parameters        : aps_get_parameters,
1525        start_tone            : aps_start_tone,
1526        stop_tone             : aps_stop_tone,
1527        set_voice_volume      : aps_set_voice_volume,
1528        move_effects          : aps_move_effects,
1529    };
1530}; // namespace <unnamed>
1531
1532}; // namespace android
1533