AudioFlinger.cpp revision 9ee159b79022b2e1a050acb3890ce948e99e9ccb 
1/* //device/include/server/AudioFlinger/AudioFlinger.cpp
2**
3** Copyright 2007, The Android Open Source Project
4**
5** Licensed under the Apache License, Version 2.0 (the "License");
6** you may not use this file except in compliance with the License.
7** You may obtain a copy of the License at
8**
9**     http://www.apache.org/licenses/LICENSE-2.0
10**
11** Unless required by applicable law or agreed to in writing, software
12** distributed under the License is distributed on an "AS IS" BASIS,
13** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14** See the License for the specific language governing permissions and
15** limitations under the License.
16*/
17
18
19#define LOG_TAG "AudioFlinger"
20//#define LOG_NDEBUG 0
21
22#include <math.h>
23#include <signal.h>
24#include <sys/time.h>
25#include <sys/resource.h>
26
27#include <binder/IPCThreadState.h>
28#include <binder/IServiceManager.h>
29#include <utils/Log.h>
30#include <binder/Parcel.h>
31#include <binder/IPCThreadState.h>
32#include <utils/String16.h>
33#include <utils/threads.h>
34
35#include <cutils/properties.h>
36
37#include <media/AudioTrack.h>
38#include <media/AudioRecord.h>
39#include <media/IMediaPlayerService.h>
40
41#include <private/media/AudioTrackShared.h>
42#include <private/media/AudioEffectShared.h>
43#include <hardware_legacy/AudioHardwareInterface.h>
44
45#include "AudioMixer.h"
46#include "AudioFlinger.h"
47
48#ifdef WITH_A2DP
49#include "A2dpAudioInterface.h"
50#endif
51
52#include <media/EffectsFactoryApi.h>
53#include <media/EffectVisualizerApi.h>
54
55// ----------------------------------------------------------------------------
56// the sim build doesn't have gettid
57
58#ifndef HAVE_GETTID
59# define gettid getpid
60#endif
61
62// ----------------------------------------------------------------------------
63
64extern const char * const gEffectLibPath;
65
66namespace android {
67
68static const char* kDeadlockedString = "AudioFlinger may be deadlocked\n";
69static const char* kHardwareLockedString = "Hardware lock is taken\n";
70
71//static const nsecs_t kStandbyTimeInNsecs = seconds(3);
72static const float MAX_GAIN = 4096.0f;
73static const float MAX_GAIN_INT = 0x1000;
74
75// retry counts for buffer fill timeout
76// 50 * ~20msecs = 1 second
77static const int8_t kMaxTrackRetries = 50;
78static const int8_t kMaxTrackStartupRetries = 50;
79// allow less retry attempts on direct output thread.
80// direct outputs can be a scarce resource in audio hardware and should
81// be released as quickly as possible.
82static const int8_t kMaxTrackRetriesDirect = 2;
83
84static const int kDumpLockRetries = 50;
85static const int kDumpLockSleep = 20000;
86
87static const nsecs_t kWarningThrottle = seconds(5);
88
89
90#define AUDIOFLINGER_SECURITY_ENABLED 1
91
92// ----------------------------------------------------------------------------
93
94static bool recordingAllowed() {
95#ifndef HAVE_ANDROID_OS
96    return true;
97#endif
98#if AUDIOFLINGER_SECURITY_ENABLED
99    if (getpid() == IPCThreadState::self()->getCallingPid()) return true;
100    bool ok = checkCallingPermission(String16("android.permission.RECORD_AUDIO"));
101    if (!ok) LOGE("Request requires android.permission.RECORD_AUDIO");
102    return ok;
103#else
104    if (!checkCallingPermission(String16("android.permission.RECORD_AUDIO")))
105        LOGW("WARNING: Need to add android.permission.RECORD_AUDIO to manifest");
106    return true;
107#endif
108}
109
110static bool settingsAllowed() {
111#ifndef HAVE_ANDROID_OS
112    return true;
113#endif
114#if AUDIOFLINGER_SECURITY_ENABLED
115    if (getpid() == IPCThreadState::self()->getCallingPid()) return true;
116    bool ok = checkCallingPermission(String16("android.permission.MODIFY_AUDIO_SETTINGS"));
117    if (!ok) LOGE("Request requires android.permission.MODIFY_AUDIO_SETTINGS");
118    return ok;
119#else
120    if (!checkCallingPermission(String16("android.permission.MODIFY_AUDIO_SETTINGS")))
121        LOGW("WARNING: Need to add android.permission.MODIFY_AUDIO_SETTINGS to manifest");
122    return true;
123#endif
124}
125
126// To collect the amplifier usage
127static void addBatteryData(uint32_t params) {
128    sp<IBinder> binder =
129        defaultServiceManager()->getService(String16("media.player"));
130    sp<IMediaPlayerService> service = interface_cast<IMediaPlayerService>(binder);
131    if (service.get() == NULL) {
132        LOGW("Cannot connect to the MediaPlayerService for battery tracking");
133        return;
134    }
135
136    service->addBatteryData(params);
137}
138
139// ----------------------------------------------------------------------------
140
141AudioFlinger::AudioFlinger()
142    : BnAudioFlinger(),
143        mAudioHardware(0), mMasterVolume(1.0f), mMasterMute(false), mNextUniqueId(1)
144{
145    Mutex::Autolock _l(mLock);
146
147    mHardwareStatus = AUDIO_HW_IDLE;
148
149    mAudioHardware = AudioHardwareInterface::create();
150
151    mHardwareStatus = AUDIO_HW_INIT;
152    if (mAudioHardware->initCheck() == NO_ERROR) {
153        AutoMutex lock(mHardwareLock);
154        mMode = AudioSystem::MODE_NORMAL;
155        mHardwareStatus = AUDIO_HW_SET_MODE;
156        mAudioHardware->setMode(mMode);
157        mHardwareStatus = AUDIO_HW_SET_MASTER_VOLUME;
158        mAudioHardware->setMasterVolume(1.0f);
159        mHardwareStatus = AUDIO_HW_IDLE;
160    } else {
161        LOGE("Couldn't even initialize the stubbed audio hardware!");
162    }
163}
164
165AudioFlinger::~AudioFlinger()
166{
167    while (!mRecordThreads.isEmpty()) {
168        // closeInput() will remove first entry from mRecordThreads
169        closeInput(mRecordThreads.keyAt(0));
170    }
171    while (!mPlaybackThreads.isEmpty()) {
172        // closeOutput() will remove first entry from mPlaybackThreads
173        closeOutput(mPlaybackThreads.keyAt(0));
174    }
175    if (mAudioHardware) {
176        delete mAudioHardware;
177    }
178}
179
180
181
182status_t AudioFlinger::dumpClients(int fd, const Vector<String16>& args)
183{
184    const size_t SIZE = 256;
185    char buffer[SIZE];
186    String8 result;
187
188    result.append("Clients:\n");
189    for (size_t i = 0; i < mClients.size(); ++i) {
190        wp<Client> wClient = mClients.valueAt(i);
191        if (wClient != 0) {
192            sp<Client> client = wClient.promote();
193            if (client != 0) {
194                snprintf(buffer, SIZE, "  pid: %d\n", client->pid());
195                result.append(buffer);
196            }
197        }
198    }
199    write(fd, result.string(), result.size());
200    return NO_ERROR;
201}
202
203
204status_t AudioFlinger::dumpInternals(int fd, const Vector<String16>& args)
205{
206    const size_t SIZE = 256;
207    char buffer[SIZE];
208    String8 result;
209    int hardwareStatus = mHardwareStatus;
210
211    snprintf(buffer, SIZE, "Hardware status: %d\n", hardwareStatus);
212    result.append(buffer);
213    write(fd, result.string(), result.size());
214    return NO_ERROR;
215}
216
217status_t AudioFlinger::dumpPermissionDenial(int fd, const Vector<String16>& args)
218{
219    const size_t SIZE = 256;
220    char buffer[SIZE];
221    String8 result;
222    snprintf(buffer, SIZE, "Permission Denial: "
223            "can't dump AudioFlinger from pid=%d, uid=%d\n",
224            IPCThreadState::self()->getCallingPid(),
225            IPCThreadState::self()->getCallingUid());
226    result.append(buffer);
227    write(fd, result.string(), result.size());
228    return NO_ERROR;
229}
230
231static bool tryLock(Mutex& mutex)
232{
233    bool locked = false;
234    for (int i = 0; i < kDumpLockRetries; ++i) {
235        if (mutex.tryLock() == NO_ERROR) {
236            locked = true;
237            break;
238        }
239        usleep(kDumpLockSleep);
240    }
241    return locked;
242}
243
244status_t AudioFlinger::dump(int fd, const Vector<String16>& args)
245{
246    if (checkCallingPermission(String16("android.permission.DUMP")) == false) {
247        dumpPermissionDenial(fd, args);
248    } else {
249        // get state of hardware lock
250        bool hardwareLocked = tryLock(mHardwareLock);
251        if (!hardwareLocked) {
252            String8 result(kHardwareLockedString);
253            write(fd, result.string(), result.size());
254        } else {
255            mHardwareLock.unlock();
256        }
257
258        bool locked = tryLock(mLock);
259
260        // failed to lock - AudioFlinger is probably deadlocked
261        if (!locked) {
262            String8 result(kDeadlockedString);
263            write(fd, result.string(), result.size());
264        }
265
266        dumpClients(fd, args);
267        dumpInternals(fd, args);
268
269        // dump playback threads
270        for (size_t i = 0; i < mPlaybackThreads.size(); i++) {
271            mPlaybackThreads.valueAt(i)->dump(fd, args);
272        }
273
274        // dump record threads
275        for (size_t i = 0; i < mRecordThreads.size(); i++) {
276            mRecordThreads.valueAt(i)->dump(fd, args);
277        }
278
279        if (mAudioHardware) {
280            mAudioHardware->dumpState(fd, args);
281        }
282        if (locked) mLock.unlock();
283    }
284    return NO_ERROR;
285}
286
287
288// IAudioFlinger interface
289
290
291sp<IAudioTrack> AudioFlinger::createTrack(
292        pid_t pid,
293        int streamType,
294        uint32_t sampleRate,
295        int format,
296        int channelCount,
297        int frameCount,
298        uint32_t flags,
299        const sp<IMemory>& sharedBuffer,
300        int output,
301        int *sessionId,
302        status_t *status)
303{
304    sp<PlaybackThread::Track> track;
305    sp<TrackHandle> trackHandle;
306    sp<Client> client;
307    wp<Client> wclient;
308    status_t lStatus;
309    int lSessionId;
310
311    if (streamType >= AudioSystem::NUM_STREAM_TYPES) {
312        LOGE("invalid stream type");
313        lStatus = BAD_VALUE;
314        goto Exit;
315    }
316
317    {
318        Mutex::Autolock _l(mLock);
319        PlaybackThread *thread = checkPlaybackThread_l(output);
320        PlaybackThread *effectThread = NULL;
321        if (thread == NULL) {
322            LOGE("unknown output thread");
323            lStatus = BAD_VALUE;
324            goto Exit;
325        }
326
327        wclient = mClients.valueFor(pid);
328
329        if (wclient != NULL) {
330            client = wclient.promote();
331        } else {
332            client = new Client(this, pid);
333            mClients.add(pid, client);
334        }
335
336        LOGV("createTrack() sessionId: %d", (sessionId == NULL) ? -2 : *sessionId);
337        if (sessionId != NULL && *sessionId != AudioSystem::SESSION_OUTPUT_MIX) {
338            for (size_t i = 0; i < mPlaybackThreads.size(); i++) {
339                sp<PlaybackThread> t = mPlaybackThreads.valueAt(i);
340                if (mPlaybackThreads.keyAt(i) != output) {
341                    // prevent same audio session on different output threads
342                    uint32_t sessions = t->hasAudioSession(*sessionId);
343                    if (sessions & PlaybackThread::TRACK_SESSION) {
344                        lStatus = BAD_VALUE;
345                        goto Exit;
346                    }
347                    // check if an effect with same session ID is waiting for a track to be created
348                    if (sessions & PlaybackThread::EFFECT_SESSION) {
349                        effectThread = t.get();
350                    }
351                }
352            }
353            lSessionId = *sessionId;
354        } else {
355            // if no audio session id is provided, create one here
356            lSessionId = nextUniqueId_l();
357            if (sessionId != NULL) {
358                *sessionId = lSessionId;
359            }
360        }
361        LOGV("createTrack() lSessionId: %d", lSessionId);
362
363        track = thread->createTrack_l(client, streamType, sampleRate, format,
364                channelCount, frameCount, sharedBuffer, lSessionId, &lStatus);
365
366        // move effect chain to this output thread if an effect on same session was waiting
367        // for a track to be created
368        if (lStatus == NO_ERROR && effectThread != NULL) {
369            Mutex::Autolock _dl(thread->mLock);
370            Mutex::Autolock _sl(effectThread->mLock);
371            moveEffectChain_l(lSessionId, effectThread, thread, true);
372        }
373    }
374    if (lStatus == NO_ERROR) {
375        trackHandle = new TrackHandle(track);
376    } else {
377        // remove local strong reference to Client before deleting the Track so that the Client
378        // destructor is called by the TrackBase destructor with mLock held
379        client.clear();
380        track.clear();
381    }
382
383Exit:
384    if(status) {
385        *status = lStatus;
386    }
387    return trackHandle;
388}
389
390uint32_t AudioFlinger::sampleRate(int output) const
391{
392    Mutex::Autolock _l(mLock);
393    PlaybackThread *thread = checkPlaybackThread_l(output);
394    if (thread == NULL) {
395        LOGW("sampleRate() unknown thread %d", output);
396        return 0;
397    }
398    return thread->sampleRate();
399}
400
401int AudioFlinger::channelCount(int output) const
402{
403    Mutex::Autolock _l(mLock);
404    PlaybackThread *thread = checkPlaybackThread_l(output);
405    if (thread == NULL) {
406        LOGW("channelCount() unknown thread %d", output);
407        return 0;
408    }
409    return thread->channelCount();
410}
411
412int AudioFlinger::format(int output) const
413{
414    Mutex::Autolock _l(mLock);
415    PlaybackThread *thread = checkPlaybackThread_l(output);
416    if (thread == NULL) {
417        LOGW("format() unknown thread %d", output);
418        return 0;
419    }
420    return thread->format();
421}
422
423size_t AudioFlinger::frameCount(int output) const
424{
425    Mutex::Autolock _l(mLock);
426    PlaybackThread *thread = checkPlaybackThread_l(output);
427    if (thread == NULL) {
428        LOGW("frameCount() unknown thread %d", output);
429        return 0;
430    }
431    return thread->frameCount();
432}
433
434uint32_t AudioFlinger::latency(int output) const
435{
436    Mutex::Autolock _l(mLock);
437    PlaybackThread *thread = checkPlaybackThread_l(output);
438    if (thread == NULL) {
439        LOGW("latency() unknown thread %d", output);
440        return 0;
441    }
442    return thread->latency();
443}
444
445status_t AudioFlinger::setMasterVolume(float value)
446{
447    // check calling permissions
448    if (!settingsAllowed()) {
449        return PERMISSION_DENIED;
450    }
451
452    // when hw supports master volume, don't scale in sw mixer
453    { // scope for the lock
454        AutoMutex lock(mHardwareLock);
455        mHardwareStatus = AUDIO_HW_SET_MASTER_VOLUME;
456        if (mAudioHardware->setMasterVolume(value) == NO_ERROR) {
457            value = 1.0f;
458        }
459        mHardwareStatus = AUDIO_HW_IDLE;
460    }
461
462    Mutex::Autolock _l(mLock);
463    mMasterVolume = value;
464    for (uint32_t i = 0; i < mPlaybackThreads.size(); i++)
465       mPlaybackThreads.valueAt(i)->setMasterVolume(value);
466
467    return NO_ERROR;
468}
469
470status_t AudioFlinger::setMode(int mode)
471{
472    status_t ret;
473
474    // check calling permissions
475    if (!settingsAllowed()) {
476        return PERMISSION_DENIED;
477    }
478    if ((mode < 0) || (mode >= AudioSystem::NUM_MODES)) {
479        LOGW("Illegal value: setMode(%d)", mode);
480        return BAD_VALUE;
481    }
482
483    { // scope for the lock
484        AutoMutex lock(mHardwareLock);
485        mHardwareStatus = AUDIO_HW_SET_MODE;
486        ret = mAudioHardware->setMode(mode);
487        mHardwareStatus = AUDIO_HW_IDLE;
488    }
489
490    if (NO_ERROR == ret) {
491        Mutex::Autolock _l(mLock);
492        mMode = mode;
493        for (uint32_t i = 0; i < mPlaybackThreads.size(); i++)
494           mPlaybackThreads.valueAt(i)->setMode(mode);
495    }
496
497    return ret;
498}
499
500status_t AudioFlinger::setMicMute(bool state)
501{
502    // check calling permissions
503    if (!settingsAllowed()) {
504        return PERMISSION_DENIED;
505    }
506
507    AutoMutex lock(mHardwareLock);
508    mHardwareStatus = AUDIO_HW_SET_MIC_MUTE;
509    status_t ret = mAudioHardware->setMicMute(state);
510    mHardwareStatus = AUDIO_HW_IDLE;
511    return ret;
512}
513
514bool AudioFlinger::getMicMute() const
515{
516    bool state = AudioSystem::MODE_INVALID;
517    mHardwareStatus = AUDIO_HW_GET_MIC_MUTE;
518    mAudioHardware->getMicMute(&state);
519    mHardwareStatus = AUDIO_HW_IDLE;
520    return state;
521}
522
523status_t AudioFlinger::setMasterMute(bool muted)
524{
525    // check calling permissions
526    if (!settingsAllowed()) {
527        return PERMISSION_DENIED;
528    }
529
530    Mutex::Autolock _l(mLock);
531    mMasterMute = muted;
532    for (uint32_t i = 0; i < mPlaybackThreads.size(); i++)
533       mPlaybackThreads.valueAt(i)->setMasterMute(muted);
534
535    return NO_ERROR;
536}
537
538float AudioFlinger::masterVolume() const
539{
540    return mMasterVolume;
541}
542
543bool AudioFlinger::masterMute() const
544{
545    return mMasterMute;
546}
547
548status_t AudioFlinger::setStreamVolume(int stream, float value, int output)
549{
550    // check calling permissions
551    if (!settingsAllowed()) {
552        return PERMISSION_DENIED;
553    }
554
555    if (stream < 0 || uint32_t(stream) >= AudioSystem::NUM_STREAM_TYPES) {
556        return BAD_VALUE;
557    }
558
559    AutoMutex lock(mLock);
560    PlaybackThread *thread = NULL;
561    if (output) {
562        thread = checkPlaybackThread_l(output);
563        if (thread == NULL) {
564            return BAD_VALUE;
565        }
566    }
567
568    mStreamTypes[stream].volume = value;
569
570    if (thread == NULL) {
571        for (uint32_t i = 0; i < mPlaybackThreads.size(); i++) {
572           mPlaybackThreads.valueAt(i)->setStreamVolume(stream, value);
573        }
574    } else {
575        thread->setStreamVolume(stream, value);
576    }
577
578    return NO_ERROR;
579}
580
581status_t AudioFlinger::setStreamMute(int stream, bool muted)
582{
583    // check calling permissions
584    if (!settingsAllowed()) {
585        return PERMISSION_DENIED;
586    }
587
588    if (stream < 0 || uint32_t(stream) >= AudioSystem::NUM_STREAM_TYPES ||
589        uint32_t(stream) == AudioSystem::ENFORCED_AUDIBLE) {
590        return BAD_VALUE;
591    }
592
593    AutoMutex lock(mLock);
594    mStreamTypes[stream].mute = muted;
595    for (uint32_t i = 0; i < mPlaybackThreads.size(); i++)
596       mPlaybackThreads.valueAt(i)->setStreamMute(stream, muted);
597
598    return NO_ERROR;
599}
600
601float AudioFlinger::streamVolume(int stream, int output) const
602{
603    if (stream < 0 || uint32_t(stream) >= AudioSystem::NUM_STREAM_TYPES) {
604        return 0.0f;
605    }
606
607    AutoMutex lock(mLock);
608    float volume;
609    if (output) {
610        PlaybackThread *thread = checkPlaybackThread_l(output);
611        if (thread == NULL) {
612            return 0.0f;
613        }
614        volume = thread->streamVolume(stream);
615    } else {
616        volume = mStreamTypes[stream].volume;
617    }
618
619    return volume;
620}
621
622bool AudioFlinger::streamMute(int stream) const
623{
624    if (stream < 0 || stream >= (int)AudioSystem::NUM_STREAM_TYPES) {
625        return true;
626    }
627
628    return mStreamTypes[stream].mute;
629}
630
631status_t AudioFlinger::setParameters(int ioHandle, const String8& keyValuePairs)
632{
633    status_t result;
634
635    LOGV("setParameters(): io %d, keyvalue %s, tid %d, calling tid %d",
636            ioHandle, keyValuePairs.string(), gettid(), IPCThreadState::self()->getCallingPid());
637    // check calling permissions
638    if (!settingsAllowed()) {
639        return PERMISSION_DENIED;
640    }
641
642    // ioHandle == 0 means the parameters are global to the audio hardware interface
643    if (ioHandle == 0) {
644        AutoMutex lock(mHardwareLock);
645        mHardwareStatus = AUDIO_SET_PARAMETER;
646        result = mAudioHardware->setParameters(keyValuePairs);
647        mHardwareStatus = AUDIO_HW_IDLE;
648        return result;
649    }
650
651    // hold a strong ref on thread in case closeOutput() or closeInput() is called
652    // and the thread is exited once the lock is released
653    sp<ThreadBase> thread;
654    {
655        Mutex::Autolock _l(mLock);
656        thread = checkPlaybackThread_l(ioHandle);
657        if (thread == NULL) {
658            thread = checkRecordThread_l(ioHandle);
659        }
660    }
661    if (thread != NULL) {
662        result = thread->setParameters(keyValuePairs);
663        return result;
664    }
665    return BAD_VALUE;
666}
667
668String8 AudioFlinger::getParameters(int ioHandle, const String8& keys)
669{
670//    LOGV("getParameters() io %d, keys %s, tid %d, calling tid %d",
671//            ioHandle, keys.string(), gettid(), IPCThreadState::self()->getCallingPid());
672
673    if (ioHandle == 0) {
674        return mAudioHardware->getParameters(keys);
675    }
676
677    Mutex::Autolock _l(mLock);
678
679    PlaybackThread *playbackThread = checkPlaybackThread_l(ioHandle);
680    if (playbackThread != NULL) {
681        return playbackThread->getParameters(keys);
682    }
683    RecordThread *recordThread = checkRecordThread_l(ioHandle);
684    if (recordThread != NULL) {
685        return recordThread->getParameters(keys);
686    }
687    return String8("");
688}
689
690size_t AudioFlinger::getInputBufferSize(uint32_t sampleRate, int format, int channelCount)
691{
692    return mAudioHardware->getInputBufferSize(sampleRate, format, channelCount);
693}
694
695unsigned int AudioFlinger::getInputFramesLost(int ioHandle)
696{
697    if (ioHandle == 0) {
698        return 0;
699    }
700
701    Mutex::Autolock _l(mLock);
702
703    RecordThread *recordThread = checkRecordThread_l(ioHandle);
704    if (recordThread != NULL) {
705        return recordThread->getInputFramesLost();
706    }
707    return 0;
708}
709
710status_t AudioFlinger::setVoiceVolume(float value)
711{
712    // check calling permissions
713    if (!settingsAllowed()) {
714        return PERMISSION_DENIED;
715    }
716
717    AutoMutex lock(mHardwareLock);
718    mHardwareStatus = AUDIO_SET_VOICE_VOLUME;
719    status_t ret = mAudioHardware->setVoiceVolume(value);
720    mHardwareStatus = AUDIO_HW_IDLE;
721
722    return ret;
723}
724
725status_t AudioFlinger::getRenderPosition(uint32_t *halFrames, uint32_t *dspFrames, int output)
726{
727    status_t status;
728
729    Mutex::Autolock _l(mLock);
730
731    PlaybackThread *playbackThread = checkPlaybackThread_l(output);
732    if (playbackThread != NULL) {
733        return playbackThread->getRenderPosition(halFrames, dspFrames);
734    }
735
736    return BAD_VALUE;
737}
738
739void AudioFlinger::registerClient(const sp<IAudioFlingerClient>& client)
740{
741
742    Mutex::Autolock _l(mLock);
743
744    int pid = IPCThreadState::self()->getCallingPid();
745    if (mNotificationClients.indexOfKey(pid) < 0) {
746        sp<NotificationClient> notificationClient = new NotificationClient(this,
747                                                                            client,
748                                                                            pid);
749        LOGV("registerClient() client %p, pid %d", notificationClient.get(), pid);
750
751        mNotificationClients.add(pid, notificationClient);
752
753        sp<IBinder> binder = client->asBinder();
754        binder->linkToDeath(notificationClient);
755
756        // the config change is always sent from playback or record threads to avoid deadlock
757        // with AudioSystem::gLock
758        for (size_t i = 0; i < mPlaybackThreads.size(); i++) {
759            mPlaybackThreads.valueAt(i)->sendConfigEvent(AudioSystem::OUTPUT_OPENED);
760        }
761
762        for (size_t i = 0; i < mRecordThreads.size(); i++) {
763            mRecordThreads.valueAt(i)->sendConfigEvent(AudioSystem::INPUT_OPENED);
764        }
765    }
766}
767
768void AudioFlinger::removeNotificationClient(pid_t pid)
769{
770    Mutex::Autolock _l(mLock);
771
772    int index = mNotificationClients.indexOfKey(pid);
773    if (index >= 0) {
774        sp <NotificationClient> client = mNotificationClients.valueFor(pid);
775        LOGV("removeNotificationClient() %p, pid %d", client.get(), pid);
776        mNotificationClients.removeItem(pid);
777    }
778}
779
780// audioConfigChanged_l() must be called with AudioFlinger::mLock held
781void AudioFlinger::audioConfigChanged_l(int event, int ioHandle, void *param2)
782{
783    size_t size = mNotificationClients.size();
784    for (size_t i = 0; i < size; i++) {
785        mNotificationClients.valueAt(i)->client()->ioConfigChanged(event, ioHandle, param2);
786    }
787}
788
789// removeClient_l() must be called with AudioFlinger::mLock held
790void AudioFlinger::removeClient_l(pid_t pid)
791{
792    LOGV("removeClient_l() pid %d, tid %d, calling tid %d", pid, gettid(), IPCThreadState::self()->getCallingPid());
793    mClients.removeItem(pid);
794}
795
796
797// ----------------------------------------------------------------------------
798
799AudioFlinger::ThreadBase::ThreadBase(const sp<AudioFlinger>& audioFlinger, int id)
800    :   Thread(false),
801        mAudioFlinger(audioFlinger), mSampleRate(0), mFrameCount(0), mChannelCount(0),
802        mFrameSize(1), mFormat(0), mStandby(false), mId(id), mExiting(false)
803{
804}
805
806AudioFlinger::ThreadBase::~ThreadBase()
807{
808    mParamCond.broadcast();
809    mNewParameters.clear();
810}
811
812void AudioFlinger::ThreadBase::exit()
813{
814    // keep a strong ref on ourself so that we wont get
815    // destroyed in the middle of requestExitAndWait()
816    sp <ThreadBase> strongMe = this;
817
818    LOGV("ThreadBase::exit");
819    {
820        AutoMutex lock(&mLock);
821        mExiting = true;
822        requestExit();
823        mWaitWorkCV.signal();
824    }
825    requestExitAndWait();
826}
827
828uint32_t AudioFlinger::ThreadBase::sampleRate() const
829{
830    return mSampleRate;
831}
832
833int AudioFlinger::ThreadBase::channelCount() const
834{
835    return (int)mChannelCount;
836}
837
838int AudioFlinger::ThreadBase::format() const
839{
840    return mFormat;
841}
842
843size_t AudioFlinger::ThreadBase::frameCount() const
844{
845    return mFrameCount;
846}
847
848status_t AudioFlinger::ThreadBase::setParameters(const String8& keyValuePairs)
849{
850    status_t status;
851
852    LOGV("ThreadBase::setParameters() %s", keyValuePairs.string());
853    Mutex::Autolock _l(mLock);
854
855    mNewParameters.add(keyValuePairs);
856    mWaitWorkCV.signal();
857    // wait condition with timeout in case the thread loop has exited
858    // before the request could be processed
859    if (mParamCond.waitRelative(mLock, seconds(2)) == NO_ERROR) {
860        status = mParamStatus;
861        mWaitWorkCV.signal();
862    } else {
863        status = TIMED_OUT;
864    }
865    return status;
866}
867
868void AudioFlinger::ThreadBase::sendConfigEvent(int event, int param)
869{
870    Mutex::Autolock _l(mLock);
871    sendConfigEvent_l(event, param);
872}
873
874// sendConfigEvent_l() must be called with ThreadBase::mLock held
875void AudioFlinger::ThreadBase::sendConfigEvent_l(int event, int param)
876{
877    ConfigEvent *configEvent = new ConfigEvent();
878    configEvent->mEvent = event;
879    configEvent->mParam = param;
880    mConfigEvents.add(configEvent);
881    LOGV("sendConfigEvent() num events %d event %d, param %d", mConfigEvents.size(), event, param);
882    mWaitWorkCV.signal();
883}
884
885void AudioFlinger::ThreadBase::processConfigEvents()
886{
887    mLock.lock();
888    while(!mConfigEvents.isEmpty()) {
889        LOGV("processConfigEvents() remaining events %d", mConfigEvents.size());
890        ConfigEvent *configEvent = mConfigEvents[0];
891        mConfigEvents.removeAt(0);
892        // release mLock before locking AudioFlinger mLock: lock order is always
893        // AudioFlinger then ThreadBase to avoid cross deadlock
894        mLock.unlock();
895        mAudioFlinger->mLock.lock();
896        audioConfigChanged_l(configEvent->mEvent, configEvent->mParam);
897        mAudioFlinger->mLock.unlock();
898        delete configEvent;
899        mLock.lock();
900    }
901    mLock.unlock();
902}
903
904status_t AudioFlinger::ThreadBase::dumpBase(int fd, const Vector<String16>& args)
905{
906    const size_t SIZE = 256;
907    char buffer[SIZE];
908    String8 result;
909
910    bool locked = tryLock(mLock);
911    if (!locked) {
912        snprintf(buffer, SIZE, "thread %p maybe dead locked\n", this);
913        write(fd, buffer, strlen(buffer));
914    }
915
916    snprintf(buffer, SIZE, "standby: %d\n", mStandby);
917    result.append(buffer);
918    snprintf(buffer, SIZE, "Sample rate: %d\n", mSampleRate);
919    result.append(buffer);
920    snprintf(buffer, SIZE, "Frame count: %d\n", mFrameCount);
921    result.append(buffer);
922    snprintf(buffer, SIZE, "Channel Count: %d\n", mChannelCount);
923    result.append(buffer);
924    snprintf(buffer, SIZE, "Format: %d\n", mFormat);
925    result.append(buffer);
926    snprintf(buffer, SIZE, "Frame size: %d\n", mFrameSize);
927    result.append(buffer);
928
929    snprintf(buffer, SIZE, "\nPending setParameters commands: \n");
930    result.append(buffer);
931    result.append(" Index Command");
932    for (size_t i = 0; i < mNewParameters.size(); ++i) {
933        snprintf(buffer, SIZE, "\n %02d    ", i);
934        result.append(buffer);
935        result.append(mNewParameters[i]);
936    }
937
938    snprintf(buffer, SIZE, "\n\nPending config events: \n");
939    result.append(buffer);
940    snprintf(buffer, SIZE, " Index event param\n");
941    result.append(buffer);
942    for (size_t i = 0; i < mConfigEvents.size(); i++) {
943        snprintf(buffer, SIZE, " %02d    %02d    %d\n", i, mConfigEvents[i]->mEvent, mConfigEvents[i]->mParam);
944        result.append(buffer);
945    }
946    result.append("\n");
947
948    write(fd, result.string(), result.size());
949
950    if (locked) {
951        mLock.unlock();
952    }
953    return NO_ERROR;
954}
955
956
957// ----------------------------------------------------------------------------
958
959AudioFlinger::PlaybackThread::PlaybackThread(const sp<AudioFlinger>& audioFlinger, AudioStreamOut* output, int id, uint32_t device)
960    :   ThreadBase(audioFlinger, id),
961        mMixBuffer(0), mSuspended(0), mBytesWritten(0), mOutput(output),
962        mLastWriteTime(0), mNumWrites(0), mNumDelayedWrites(0), mInWrite(false),
963        mDevice(device)
964{
965    readOutputParameters();
966
967    mMasterVolume = mAudioFlinger->masterVolume();
968    mMasterMute = mAudioFlinger->masterMute();
969
970    for (int stream = 0; stream < AudioSystem::NUM_STREAM_TYPES; stream++) {
971        mStreamTypes[stream].volume = mAudioFlinger->streamVolumeInternal(stream);
972        mStreamTypes[stream].mute = mAudioFlinger->streamMute(stream);
973    }
974}
975
976AudioFlinger::PlaybackThread::~PlaybackThread()
977{
978    delete [] mMixBuffer;
979}
980
981status_t AudioFlinger::PlaybackThread::dump(int fd, const Vector<String16>& args)
982{
983    dumpInternals(fd, args);
984    dumpTracks(fd, args);
985    dumpEffectChains(fd, args);
986    return NO_ERROR;
987}
988
989status_t AudioFlinger::PlaybackThread::dumpTracks(int fd, const Vector<String16>& args)
990{
991    const size_t SIZE = 256;
992    char buffer[SIZE];
993    String8 result;
994
995    snprintf(buffer, SIZE, "Output thread %p tracks\n", this);
996    result.append(buffer);
997    result.append("   Name  Clien Typ Fmt Chn Session Buf  S M F SRate LeftV RighV  Serv       User       Main buf   Aux Buf\n");
998    for (size_t i = 0; i < mTracks.size(); ++i) {
999        sp<Track> track = mTracks[i];
1000        if (track != 0) {
1001            track->dump(buffer, SIZE);
1002            result.append(buffer);
1003        }
1004    }
1005
1006    snprintf(buffer, SIZE, "Output thread %p active tracks\n", this);
1007    result.append(buffer);
1008    result.append("   Name  Clien Typ Fmt Chn Session Buf  S M F SRate LeftV RighV  Serv       User       Main buf   Aux Buf\n");
1009    for (size_t i = 0; i < mActiveTracks.size(); ++i) {
1010        wp<Track> wTrack = mActiveTracks[i];
1011        if (wTrack != 0) {
1012            sp<Track> track = wTrack.promote();
1013            if (track != 0) {
1014                track->dump(buffer, SIZE);
1015                result.append(buffer);
1016            }
1017        }
1018    }
1019    write(fd, result.string(), result.size());
1020    return NO_ERROR;
1021}
1022
1023status_t AudioFlinger::PlaybackThread::dumpEffectChains(int fd, const Vector<String16>& args)
1024{
1025    const size_t SIZE = 256;
1026    char buffer[SIZE];
1027    String8 result;
1028
1029    snprintf(buffer, SIZE, "\n- %d Effect Chains:\n", mEffectChains.size());
1030    write(fd, buffer, strlen(buffer));
1031
1032    for (size_t i = 0; i < mEffectChains.size(); ++i) {
1033        sp<EffectChain> chain = mEffectChains[i];
1034        if (chain != 0) {
1035            chain->dump(fd, args);
1036        }
1037    }
1038    return NO_ERROR;
1039}
1040
1041status_t AudioFlinger::PlaybackThread::dumpInternals(int fd, const Vector<String16>& args)
1042{
1043    const size_t SIZE = 256;
1044    char buffer[SIZE];
1045    String8 result;
1046
1047    snprintf(buffer, SIZE, "\nOutput thread %p internals\n", this);
1048    result.append(buffer);
1049    snprintf(buffer, SIZE, "last write occurred (msecs): %llu\n", ns2ms(systemTime() - mLastWriteTime));
1050    result.append(buffer);
1051    snprintf(buffer, SIZE, "total writes: %d\n", mNumWrites);
1052    result.append(buffer);
1053    snprintf(buffer, SIZE, "delayed writes: %d\n", mNumDelayedWrites);
1054    result.append(buffer);
1055    snprintf(buffer, SIZE, "blocked in write: %d\n", mInWrite);
1056    result.append(buffer);
1057    snprintf(buffer, SIZE, "suspend count: %d\n", mSuspended);
1058    result.append(buffer);
1059    snprintf(buffer, SIZE, "mix buffer : %p\n", mMixBuffer);
1060    result.append(buffer);
1061    write(fd, result.string(), result.size());
1062
1063    dumpBase(fd, args);
1064
1065    return NO_ERROR;
1066}
1067
1068// Thread virtuals
1069status_t AudioFlinger::PlaybackThread::readyToRun()
1070{
1071    if (mSampleRate == 0) {
1072        LOGE("No working audio driver found.");
1073        return NO_INIT;
1074    }
1075    LOGI("AudioFlinger's thread %p ready to run", this);
1076    return NO_ERROR;
1077}
1078
1079void AudioFlinger::PlaybackThread::onFirstRef()
1080{
1081    const size_t SIZE = 256;
1082    char buffer[SIZE];
1083
1084    snprintf(buffer, SIZE, "Playback Thread %p", this);
1085
1086    run(buffer, ANDROID_PRIORITY_URGENT_AUDIO);
1087}
1088
1089// PlaybackThread::createTrack_l() must be called with AudioFlinger::mLock held
1090sp<AudioFlinger::PlaybackThread::Track>  AudioFlinger::PlaybackThread::createTrack_l(
1091        const sp<AudioFlinger::Client>& client,
1092        int streamType,
1093        uint32_t sampleRate,
1094        int format,
1095        int channelCount,
1096        int frameCount,
1097        const sp<IMemory>& sharedBuffer,
1098        int sessionId,
1099        status_t *status)
1100{
1101    sp<Track> track;
1102    status_t lStatus;
1103
1104    if (mType == DIRECT) {
1105        if (sampleRate != mSampleRate || format != mFormat || channelCount != (int)mChannelCount) {
1106            LOGE("createTrack_l() Bad parameter:  sampleRate %d format %d, channelCount %d for output %p",
1107                 sampleRate, format, channelCount, mOutput);
1108            lStatus = BAD_VALUE;
1109            goto Exit;
1110        }
1111    } else {
1112        // Resampler implementation limits input sampling rate to 2 x output sampling rate.
1113        if (sampleRate > mSampleRate*2) {
1114            LOGE("Sample rate out of range: %d mSampleRate %d", sampleRate, mSampleRate);
1115            lStatus = BAD_VALUE;
1116            goto Exit;
1117        }
1118    }
1119
1120    if (mOutput == 0) {
1121        LOGE("Audio driver not initialized.");
1122        lStatus = NO_INIT;
1123        goto Exit;
1124    }
1125
1126    { // scope for mLock
1127        Mutex::Autolock _l(mLock);
1128
1129        // all tracks in same audio session must share the same routing strategy otherwise
1130        // conflicts will happen when tracks are moved from one output to another by audio policy
1131        // manager
1132        uint32_t strategy =
1133                AudioSystem::getStrategyForStream((AudioSystem::stream_type)streamType);
1134        for (size_t i = 0; i < mTracks.size(); ++i) {
1135            sp<Track> t = mTracks[i];
1136            if (t != 0) {
1137                if (sessionId == t->sessionId() &&
1138                        strategy != AudioSystem::getStrategyForStream((AudioSystem::stream_type)t->type())) {
1139                    lStatus = BAD_VALUE;
1140                    goto Exit;
1141                }
1142            }
1143        }
1144
1145        track = new Track(this, client, streamType, sampleRate, format,
1146                channelCount, frameCount, sharedBuffer, sessionId);
1147        if (track->getCblk() == NULL || track->name() < 0) {
1148            lStatus = NO_MEMORY;
1149            goto Exit;
1150        }
1151        mTracks.add(track);
1152
1153        sp<EffectChain> chain = getEffectChain_l(sessionId);
1154        if (chain != 0) {
1155            LOGV("createTrack_l() setting main buffer %p", chain->inBuffer());
1156            track->setMainBuffer(chain->inBuffer());
1157            chain->setStrategy(AudioSystem::getStrategyForStream((AudioSystem::stream_type)track->type()));
1158        }
1159    }
1160    lStatus = NO_ERROR;
1161
1162Exit:
1163    if(status) {
1164        *status = lStatus;
1165    }
1166    return track;
1167}
1168
1169uint32_t AudioFlinger::PlaybackThread::latency() const
1170{
1171    if (mOutput) {
1172        return mOutput->latency();
1173    }
1174    else {
1175        return 0;
1176    }
1177}
1178
1179status_t AudioFlinger::PlaybackThread::setMasterVolume(float value)
1180{
1181    mMasterVolume = value;
1182    return NO_ERROR;
1183}
1184
1185status_t AudioFlinger::PlaybackThread::setMasterMute(bool muted)
1186{
1187    mMasterMute = muted;
1188    return NO_ERROR;
1189}
1190
1191float AudioFlinger::PlaybackThread::masterVolume() const
1192{
1193    return mMasterVolume;
1194}
1195
1196bool AudioFlinger::PlaybackThread::masterMute() const
1197{
1198    return mMasterMute;
1199}
1200
1201status_t AudioFlinger::PlaybackThread::setStreamVolume(int stream, float value)
1202{
1203    mStreamTypes[stream].volume = value;
1204    return NO_ERROR;
1205}
1206
1207status_t AudioFlinger::PlaybackThread::setStreamMute(int stream, bool muted)
1208{
1209    mStreamTypes[stream].mute = muted;
1210    return NO_ERROR;
1211}
1212
1213float AudioFlinger::PlaybackThread::streamVolume(int stream) const
1214{
1215    return mStreamTypes[stream].volume;
1216}
1217
1218bool AudioFlinger::PlaybackThread::streamMute(int stream) const
1219{
1220    return mStreamTypes[stream].mute;
1221}
1222
1223// addTrack_l() must be called with ThreadBase::mLock held
1224status_t AudioFlinger::PlaybackThread::addTrack_l(const sp<Track>& track)
1225{
1226    status_t status = ALREADY_EXISTS;
1227
1228    // set retry count for buffer fill
1229    track->mRetryCount = kMaxTrackStartupRetries;
1230    if (mActiveTracks.indexOf(track) < 0) {
1231        // the track is newly added, make sure it fills up all its
1232        // buffers before playing. This is to ensure the client will
1233        // effectively get the latency it requested.
1234        track->mFillingUpStatus = Track::FS_FILLING;
1235        track->mResetDone = false;
1236        mActiveTracks.add(track);
1237        if (track->mainBuffer() != mMixBuffer) {
1238            sp<EffectChain> chain = getEffectChain_l(track->sessionId());
1239            if (chain != 0) {
1240                LOGV("addTrack_l() starting track on chain %p for session %d", chain.get(), track->sessionId());
1241                chain->startTrack();
1242            }
1243        }
1244
1245        status = NO_ERROR;
1246    }
1247
1248    LOGV("mWaitWorkCV.broadcast");
1249    mWaitWorkCV.broadcast();
1250
1251    return status;
1252}
1253
1254// destroyTrack_l() must be called with ThreadBase::mLock held
1255void AudioFlinger::PlaybackThread::destroyTrack_l(const sp<Track>& track)
1256{
1257    track->mState = TrackBase::TERMINATED;
1258    if (mActiveTracks.indexOf(track) < 0) {
1259        mTracks.remove(track);
1260        deleteTrackName_l(track->name());
1261    }
1262}
1263
1264String8 AudioFlinger::PlaybackThread::getParameters(const String8& keys)
1265{
1266    return mOutput->getParameters(keys);
1267}
1268
1269// destroyTrack_l() must be called with AudioFlinger::mLock held
1270void AudioFlinger::PlaybackThread::audioConfigChanged_l(int event, int param) {
1271    AudioSystem::OutputDescriptor desc;
1272    void *param2 = 0;
1273
1274    LOGV("PlaybackThread::audioConfigChanged_l, thread %p, event %d, param %d", this, event, param);
1275
1276    switch (event) {
1277    case AudioSystem::OUTPUT_OPENED:
1278    case AudioSystem::OUTPUT_CONFIG_CHANGED:
1279        desc.channels = mChannels;
1280        desc.samplingRate = mSampleRate;
1281        desc.format = mFormat;
1282        desc.frameCount = mFrameCount;
1283        desc.latency = latency();
1284        param2 = &desc;
1285        break;
1286
1287    case AudioSystem::STREAM_CONFIG_CHANGED:
1288        param2 = &param;
1289    case AudioSystem::OUTPUT_CLOSED:
1290    default:
1291        break;
1292    }
1293    mAudioFlinger->audioConfigChanged_l(event, mId, param2);
1294}
1295
1296void AudioFlinger::PlaybackThread::readOutputParameters()
1297{
1298    mSampleRate = mOutput->sampleRate();
1299    mChannels = mOutput->channels();
1300    mChannelCount = (uint16_t)AudioSystem::popCount(mChannels);
1301    mFormat = mOutput->format();
1302    mFrameSize = (uint16_t)mOutput->frameSize();
1303    mFrameCount = mOutput->bufferSize() / mFrameSize;
1304
1305    // FIXME - Current mixer implementation only supports stereo output: Always
1306    // Allocate a stereo buffer even if HW output is mono.
1307    if (mMixBuffer != NULL) delete[] mMixBuffer;
1308    mMixBuffer = new int16_t[mFrameCount * 2];
1309    memset(mMixBuffer, 0, mFrameCount * 2 * sizeof(int16_t));
1310
1311    // force reconfiguration of effect chains and engines to take new buffer size and audio
1312    // parameters into account
1313    // Note that mLock is not held when readOutputParameters() is called from the constructor
1314    // but in this case nothing is done below as no audio sessions have effect yet so it doesn't
1315    // matter.
1316    // create a copy of mEffectChains as calling moveEffectChain_l() can reorder some effect chains
1317    Vector< sp<EffectChain> > effectChains = mEffectChains;
1318    for (size_t i = 0; i < effectChains.size(); i ++) {
1319        mAudioFlinger->moveEffectChain_l(effectChains[i]->sessionId(), this, this, false);
1320    }
1321}
1322
1323status_t AudioFlinger::PlaybackThread::getRenderPosition(uint32_t *halFrames, uint32_t *dspFrames)
1324{
1325    if (halFrames == 0 || dspFrames == 0) {
1326        return BAD_VALUE;
1327    }
1328    if (mOutput == 0) {
1329        return INVALID_OPERATION;
1330    }
1331    *halFrames = mBytesWritten/mOutput->frameSize();
1332
1333    return mOutput->getRenderPosition(dspFrames);
1334}
1335
1336uint32_t AudioFlinger::PlaybackThread::hasAudioSession(int sessionId)
1337{
1338    Mutex::Autolock _l(mLock);
1339    uint32_t result = 0;
1340    if (getEffectChain_l(sessionId) != 0) {
1341        result = EFFECT_SESSION;
1342    }
1343
1344    for (size_t i = 0; i < mTracks.size(); ++i) {
1345        sp<Track> track = mTracks[i];
1346        if (sessionId == track->sessionId() &&
1347                !(track->mCblk->flags & CBLK_INVALID_MSK)) {
1348            result |= TRACK_SESSION;
1349            break;
1350        }
1351    }
1352
1353    return result;
1354}
1355
1356uint32_t AudioFlinger::PlaybackThread::getStrategyForSession_l(int sessionId)
1357{
1358    // session AudioSystem::SESSION_OUTPUT_MIX is placed in same strategy as MUSIC stream so that
1359    // it is moved to correct output by audio policy manager when A2DP is connected or disconnected
1360    if (sessionId == AudioSystem::SESSION_OUTPUT_MIX) {
1361        return AudioSystem::getStrategyForStream(AudioSystem::MUSIC);
1362    }
1363    for (size_t i = 0; i < mTracks.size(); i++) {
1364        sp<Track> track = mTracks[i];
1365        if (sessionId == track->sessionId() &&
1366                !(track->mCblk->flags & CBLK_INVALID_MSK)) {
1367            return AudioSystem::getStrategyForStream((AudioSystem::stream_type) track->type());
1368        }
1369    }
1370    return AudioSystem::getStrategyForStream(AudioSystem::MUSIC);
1371}
1372
1373sp<AudioFlinger::EffectChain> AudioFlinger::PlaybackThread::getEffectChain(int sessionId)
1374{
1375    Mutex::Autolock _l(mLock);
1376    return getEffectChain_l(sessionId);
1377}
1378
1379sp<AudioFlinger::EffectChain> AudioFlinger::PlaybackThread::getEffectChain_l(int sessionId)
1380{
1381    sp<EffectChain> chain;
1382
1383    size_t size = mEffectChains.size();
1384    for (size_t i = 0; i < size; i++) {
1385        if (mEffectChains[i]->sessionId() == sessionId) {
1386            chain = mEffectChains[i];
1387            break;
1388        }
1389    }
1390    return chain;
1391}
1392
1393void AudioFlinger::PlaybackThread::setMode(uint32_t mode)
1394{
1395    Mutex::Autolock _l(mLock);
1396    size_t size = mEffectChains.size();
1397    for (size_t i = 0; i < size; i++) {
1398        mEffectChains[i]->setMode_l(mode);
1399    }
1400}
1401
1402// ----------------------------------------------------------------------------
1403
1404AudioFlinger::MixerThread::MixerThread(const sp<AudioFlinger>& audioFlinger, AudioStreamOut* output, int id, uint32_t device)
1405    :   PlaybackThread(audioFlinger, output, id, device),
1406        mAudioMixer(0)
1407{
1408    mType = PlaybackThread::MIXER;
1409    mAudioMixer = new AudioMixer(mFrameCount, mSampleRate);
1410
1411    // FIXME - Current mixer implementation only supports stereo output
1412    if (mChannelCount == 1) {
1413        LOGE("Invalid audio hardware channel count");
1414    }
1415}
1416
1417AudioFlinger::MixerThread::~MixerThread()
1418{
1419    delete mAudioMixer;
1420}
1421
1422bool AudioFlinger::MixerThread::threadLoop()
1423{
1424    Vector< sp<Track> > tracksToRemove;
1425    uint32_t mixerStatus = MIXER_IDLE;
1426    nsecs_t standbyTime = systemTime();
1427    size_t mixBufferSize = mFrameCount * mFrameSize;
1428    // FIXME: Relaxed timing because of a certain device that can't meet latency
1429    // Should be reduced to 2x after the vendor fixes the driver issue
1430    nsecs_t maxPeriod = seconds(mFrameCount) / mSampleRate * 3;
1431    nsecs_t lastWarning = 0;
1432    bool longStandbyExit = false;
1433    uint32_t activeSleepTime = activeSleepTimeUs();
1434    uint32_t idleSleepTime = idleSleepTimeUs();
1435    uint32_t sleepTime = idleSleepTime;
1436    Vector< sp<EffectChain> > effectChains;
1437
1438    while (!exitPending())
1439    {
1440        processConfigEvents();
1441
1442        mixerStatus = MIXER_IDLE;
1443        { // scope for mLock
1444
1445            Mutex::Autolock _l(mLock);
1446
1447            if (checkForNewParameters_l()) {
1448                mixBufferSize = mFrameCount * mFrameSize;
1449                // FIXME: Relaxed timing because of a certain device that can't meet latency
1450                // Should be reduced to 2x after the vendor fixes the driver issue
1451                maxPeriod = seconds(mFrameCount) / mSampleRate * 3;
1452                activeSleepTime = activeSleepTimeUs();
1453                idleSleepTime = idleSleepTimeUs();
1454            }
1455
1456            const SortedVector< wp<Track> >& activeTracks = mActiveTracks;
1457
1458            // put audio hardware into standby after short delay
1459            if UNLIKELY((!activeTracks.size() && systemTime() > standbyTime) ||
1460                        mSuspended) {
1461                if (!mStandby) {
1462                    LOGV("Audio hardware entering standby, mixer %p, mSuspended %d\n", this, mSuspended);
1463                    mOutput->standby();
1464                    mStandby = true;
1465                    mBytesWritten = 0;
1466                }
1467
1468                if (!activeTracks.size() && mConfigEvents.isEmpty()) {
1469                    // we're about to wait, flush the binder command buffer
1470                    IPCThreadState::self()->flushCommands();
1471
1472                    if (exitPending()) break;
1473
1474                    // wait until we have something to do...
1475                    LOGV("MixerThread %p TID %d going to sleep\n", this, gettid());
1476                    mWaitWorkCV.wait(mLock);
1477                    LOGV("MixerThread %p TID %d waking up\n", this, gettid());
1478
1479                    if (mMasterMute == false) {
1480                        char value[PROPERTY_VALUE_MAX];
1481                        property_get("ro.audio.silent", value, "0");
1482                        if (atoi(value)) {
1483                            LOGD("Silence is golden");
1484                            setMasterMute(true);
1485                        }
1486                    }
1487
1488                    standbyTime = systemTime() + kStandbyTimeInNsecs;
1489                    sleepTime = idleSleepTime;
1490                    continue;
1491                }
1492            }
1493
1494            mixerStatus = prepareTracks_l(activeTracks, &tracksToRemove);
1495
1496            // prevent any changes in effect chain list and in each effect chain
1497            // during mixing and effect process as the audio buffers could be deleted
1498            // or modified if an effect is created or deleted
1499            lockEffectChains_l(effectChains);
1500       }
1501
1502        if (LIKELY(mixerStatus == MIXER_TRACKS_READY)) {
1503            // mix buffers...
1504            mAudioMixer->process();
1505            sleepTime = 0;
1506            standbyTime = systemTime() + kStandbyTimeInNsecs;
1507            //TODO: delay standby when effects have a tail
1508        } else {
1509            // If no tracks are ready, sleep once for the duration of an output
1510            // buffer size, then write 0s to the output
1511            if (sleepTime == 0) {
1512                if (mixerStatus == MIXER_TRACKS_ENABLED) {
1513                    sleepTime = activeSleepTime;
1514                } else {
1515                    sleepTime = idleSleepTime;
1516                }
1517            } else if (mBytesWritten != 0 ||
1518                       (mixerStatus == MIXER_TRACKS_ENABLED && longStandbyExit)) {
1519                memset (mMixBuffer, 0, mixBufferSize);
1520                sleepTime = 0;
1521                LOGV_IF((mBytesWritten == 0 && (mixerStatus == MIXER_TRACKS_ENABLED && longStandbyExit)), "anticipated start");
1522            }
1523            // TODO add standby time extension fct of effect tail
1524        }
1525
1526        if (mSuspended) {
1527            sleepTime = suspendSleepTimeUs();
1528        }
1529        // sleepTime == 0 means we must write to audio hardware
1530        if (sleepTime == 0) {
1531             for (size_t i = 0; i < effectChains.size(); i ++) {
1532                 effectChains[i]->process_l();
1533             }
1534             // enable changes in effect chain
1535             unlockEffectChains(effectChains);
1536            mLastWriteTime = systemTime();
1537            mInWrite = true;
1538            mBytesWritten += mixBufferSize;
1539
1540            int bytesWritten = (int)mOutput->write(mMixBuffer, mixBufferSize);
1541            if (bytesWritten < 0) mBytesWritten -= mixBufferSize;
1542            mNumWrites++;
1543            mInWrite = false;
1544            nsecs_t now = systemTime();
1545            nsecs_t delta = now - mLastWriteTime;
1546            if (delta > maxPeriod) {
1547                mNumDelayedWrites++;
1548                if ((now - lastWarning) > kWarningThrottle) {
1549                    LOGW("write blocked for %llu msecs, %d delayed writes, thread %p",
1550                            ns2ms(delta), mNumDelayedWrites, this);
1551                    lastWarning = now;
1552                }
1553                if (mStandby) {
1554                    longStandbyExit = true;
1555                }
1556            }
1557            mStandby = false;
1558        } else {
1559            // enable changes in effect chain
1560            unlockEffectChains(effectChains);
1561            usleep(sleepTime);
1562        }
1563
1564        // finally let go of all our tracks, without the lock held
1565        // since we can't guarantee the destructors won't acquire that
1566        // same lock.
1567        tracksToRemove.clear();
1568
1569        // Effect chains will be actually deleted here if they were removed from
1570        // mEffectChains list during mixing or effects processing
1571        effectChains.clear();
1572    }
1573
1574    if (!mStandby) {
1575        mOutput->standby();
1576    }
1577
1578    LOGV("MixerThread %p exiting", this);
1579    return false;
1580}
1581
1582// prepareTracks_l() must be called with ThreadBase::mLock held
1583uint32_t AudioFlinger::MixerThread::prepareTracks_l(const SortedVector< wp<Track> >& activeTracks, Vector< sp<Track> > *tracksToRemove)
1584{
1585
1586    uint32_t mixerStatus = MIXER_IDLE;
1587    // find out which tracks need to be processed
1588    size_t count = activeTracks.size();
1589    size_t mixedTracks = 0;
1590    size_t tracksWithEffect = 0;
1591
1592    float masterVolume = mMasterVolume;
1593    bool  masterMute = mMasterMute;
1594
1595    if (masterMute) {
1596        masterVolume = 0;
1597    }
1598    // Delegate master volume control to effect in output mix effect chain if needed
1599    sp<EffectChain> chain = getEffectChain_l(AudioSystem::SESSION_OUTPUT_MIX);
1600    if (chain != 0) {
1601        uint32_t v = (uint32_t)(masterVolume * (1 << 24));
1602        chain->setVolume_l(&v, &v);
1603        masterVolume = (float)((v + (1 << 23)) >> 24);
1604        chain.clear();
1605    }
1606
1607    for (size_t i=0 ; i<count ; i++) {
1608        sp<Track> t = activeTracks[i].promote();
1609        if (t == 0) continue;
1610
1611        Track* const track = t.get();
1612        audio_track_cblk_t* cblk = track->cblk();
1613
1614        // The first time a track is added we wait
1615        // for all its buffers to be filled before processing it
1616        mAudioMixer->setActiveTrack(track->name());
1617        if (cblk->framesReady() && track->isReady() &&
1618                !track->isPaused() && !track->isTerminated())
1619        {
1620            //LOGV("track %d u=%08x, s=%08x [OK] on thread %p", track->name(), cblk->user, cblk->server, this);
1621
1622            mixedTracks++;
1623
1624            // track->mainBuffer() != mMixBuffer means there is an effect chain
1625            // connected to the track
1626            chain.clear();
1627            if (track->mainBuffer() != mMixBuffer) {
1628                chain = getEffectChain_l(track->sessionId());
1629                // Delegate volume control to effect in track effect chain if needed
1630                if (chain != 0) {
1631                    tracksWithEffect++;
1632                } else {
1633                    LOGW("prepareTracks_l(): track %08x attached to effect but no chain found on session %d",
1634                            track->name(), track->sessionId());
1635                }
1636            }
1637
1638
1639            int param = AudioMixer::VOLUME;
1640            if (track->mFillingUpStatus == Track::FS_FILLED) {
1641                // no ramp for the first volume setting
1642                track->mFillingUpStatus = Track::FS_ACTIVE;
1643                if (track->mState == TrackBase::RESUMING) {
1644                    track->mState = TrackBase::ACTIVE;
1645                    param = AudioMixer::RAMP_VOLUME;
1646                }
1647                mAudioMixer->setParameter(AudioMixer::RESAMPLE, AudioMixer::RESET, NULL);
1648            } else if (cblk->server != 0) {
1649                // If the track is stopped before the first frame was mixed,
1650                // do not apply ramp
1651                param = AudioMixer::RAMP_VOLUME;
1652            }
1653
1654            // compute volume for this track
1655            uint32_t vl, vr, va;
1656            if (track->isMuted() || track->isPausing() ||
1657                mStreamTypes[track->type()].mute) {
1658                vl = vr = va = 0;
1659                if (track->isPausing()) {
1660                    track->setPaused();
1661                }
1662            } else {
1663
1664                // read original volumes with volume control
1665                float typeVolume = mStreamTypes[track->type()].volume;
1666                float v = masterVolume * typeVolume;
1667                vl = (uint32_t)(v * cblk->volume[0]) << 12;
1668                vr = (uint32_t)(v * cblk->volume[1]) << 12;
1669
1670                va = (uint32_t)(v * cblk->sendLevel);
1671            }
1672            // Delegate volume control to effect in track effect chain if needed
1673            if (chain != 0 && chain->setVolume_l(&vl, &vr)) {
1674                // Do not ramp volume if volume is controlled by effect
1675                param = AudioMixer::VOLUME;
1676                track->mHasVolumeController = true;
1677            } else {
1678                // force no volume ramp when volume controller was just disabled or removed
1679                // from effect chain to avoid volume spike
1680                if (track->mHasVolumeController) {
1681                    param = AudioMixer::VOLUME;
1682                }
1683                track->mHasVolumeController = false;
1684            }
1685
1686            // Convert volumes from 8.24 to 4.12 format
1687            int16_t left, right, aux;
1688            uint32_t v_clamped = (vl + (1 << 11)) >> 12;
1689            if (v_clamped > MAX_GAIN_INT) v_clamped = MAX_GAIN_INT;
1690            left = int16_t(v_clamped);
1691            v_clamped = (vr + (1 << 11)) >> 12;
1692            if (v_clamped > MAX_GAIN_INT) v_clamped = MAX_GAIN_INT;
1693            right = int16_t(v_clamped);
1694
1695            if (va > MAX_GAIN_INT) va = MAX_GAIN_INT;
1696            aux = int16_t(va);
1697
1698            // XXX: these things DON'T need to be done each time
1699            mAudioMixer->setBufferProvider(track);
1700            mAudioMixer->enable(AudioMixer::MIXING);
1701
1702            mAudioMixer->setParameter(param, AudioMixer::VOLUME0, (void *)left);
1703            mAudioMixer->setParameter(param, AudioMixer::VOLUME1, (void *)right);
1704            mAudioMixer->setParameter(param, AudioMixer::AUXLEVEL, (void *)aux);
1705            mAudioMixer->setParameter(
1706                AudioMixer::TRACK,
1707                AudioMixer::FORMAT, (void *)track->format());
1708            mAudioMixer->setParameter(
1709                AudioMixer::TRACK,
1710                AudioMixer::CHANNEL_COUNT, (void *)track->channelCount());
1711            mAudioMixer->setParameter(
1712                AudioMixer::RESAMPLE,
1713                AudioMixer::SAMPLE_RATE,
1714                (void *)(cblk->sampleRate));
1715            mAudioMixer->setParameter(
1716                AudioMixer::TRACK,
1717                AudioMixer::MAIN_BUFFER, (void *)track->mainBuffer());
1718            mAudioMixer->setParameter(
1719                AudioMixer::TRACK,
1720                AudioMixer::AUX_BUFFER, (void *)track->auxBuffer());
1721
1722            // reset retry count
1723            track->mRetryCount = kMaxTrackRetries;
1724            mixerStatus = MIXER_TRACKS_READY;
1725        } else {
1726            //LOGV("track %d u=%08x, s=%08x [NOT READY] on thread %p", track->name(), cblk->user, cblk->server, this);
1727            if (track->isStopped()) {
1728                track->reset();
1729            }
1730            if (track->isTerminated() || track->isStopped() || track->isPaused()) {
1731                // We have consumed all the buffers of this track.
1732                // Remove it from the list of active tracks.
1733                tracksToRemove->add(track);
1734            } else {
1735                // No buffers for this track. Give it a few chances to
1736                // fill a buffer, then remove it from active list.
1737                if (--(track->mRetryCount) <= 0) {
1738                    LOGV("BUFFER TIMEOUT: remove(%d) from active list on thread %p", track->name(), this);
1739                    tracksToRemove->add(track);
1740                    // indicate to client process that the track was disabled because of underrun
1741                    cblk->flags |= CBLK_DISABLED_ON;
1742                } else if (mixerStatus != MIXER_TRACKS_READY) {
1743                    mixerStatus = MIXER_TRACKS_ENABLED;
1744                }
1745            }
1746            mAudioMixer->disable(AudioMixer::MIXING);
1747        }
1748    }
1749
1750    // remove all the tracks that need to be...
1751    count = tracksToRemove->size();
1752    if (UNLIKELY(count)) {
1753        for (size_t i=0 ; i<count ; i++) {
1754            const sp<Track>& track = tracksToRemove->itemAt(i);
1755            mActiveTracks.remove(track);
1756            if (track->mainBuffer() != mMixBuffer) {
1757                chain = getEffectChain_l(track->sessionId());
1758                if (chain != 0) {
1759                    LOGV("stopping track on chain %p for session Id: %d", chain.get(), track->sessionId());
1760                    chain->stopTrack();
1761                }
1762            }
1763            if (track->isTerminated()) {
1764                mTracks.remove(track);
1765                deleteTrackName_l(track->mName);
1766            }
1767        }
1768    }
1769
1770    // mix buffer must be cleared if all tracks are connected to an
1771    // effect chain as in this case the mixer will not write to
1772    // mix buffer and track effects will accumulate into it
1773    if (mixedTracks != 0 && mixedTracks == tracksWithEffect) {
1774        memset(mMixBuffer, 0, mFrameCount * mChannelCount * sizeof(int16_t));
1775    }
1776
1777    return mixerStatus;
1778}
1779
1780void AudioFlinger::MixerThread::invalidateTracks(int streamType)
1781{
1782    LOGV ("MixerThread::invalidateTracks() mixer %p, streamType %d, mTracks.size %d",
1783            this,  streamType, mTracks.size());
1784    Mutex::Autolock _l(mLock);
1785
1786    size_t size = mTracks.size();
1787    for (size_t i = 0; i < size; i++) {
1788        sp<Track> t = mTracks[i];
1789        if (t->type() == streamType) {
1790            t->mCblk->lock.lock();
1791            t->mCblk->flags |= CBLK_INVALID_ON;
1792            t->mCblk->cv.signal();
1793            t->mCblk->lock.unlock();
1794        }
1795    }
1796}
1797
1798
1799// getTrackName_l() must be called with ThreadBase::mLock held
1800int AudioFlinger::MixerThread::getTrackName_l()
1801{
1802    return mAudioMixer->getTrackName();
1803}
1804
1805// deleteTrackName_l() must be called with ThreadBase::mLock held
1806void AudioFlinger::MixerThread::deleteTrackName_l(int name)
1807{
1808    LOGV("remove track (%d) and delete from mixer", name);
1809    mAudioMixer->deleteTrackName(name);
1810}
1811
1812// checkForNewParameters_l() must be called with ThreadBase::mLock held
1813bool AudioFlinger::MixerThread::checkForNewParameters_l()
1814{
1815    bool reconfig = false;
1816
1817    while (!mNewParameters.isEmpty()) {
1818        status_t status = NO_ERROR;
1819        String8 keyValuePair = mNewParameters[0];
1820        AudioParameter param = AudioParameter(keyValuePair);
1821        int value;
1822
1823        if (param.getInt(String8(AudioParameter::keySamplingRate), value) == NO_ERROR) {
1824            reconfig = true;
1825        }
1826        if (param.getInt(String8(AudioParameter::keyFormat), value) == NO_ERROR) {
1827            if (value != AudioSystem::PCM_16_BIT) {
1828                status = BAD_VALUE;
1829            } else {
1830                reconfig = true;
1831            }
1832        }
1833        if (param.getInt(String8(AudioParameter::keyChannels), value) == NO_ERROR) {
1834            if (value != AudioSystem::CHANNEL_OUT_STEREO) {
1835                status = BAD_VALUE;
1836            } else {
1837                reconfig = true;
1838            }
1839        }
1840        if (param.getInt(String8(AudioParameter::keyFrameCount), value) == NO_ERROR) {
1841            // do not accept frame count changes if tracks are open as the track buffer
1842            // size depends on frame count and correct behavior would not be garantied
1843            // if frame count is changed after track creation
1844            if (!mTracks.isEmpty()) {
1845                status = INVALID_OPERATION;
1846            } else {
1847                reconfig = true;
1848            }
1849        }
1850        if (param.getInt(String8(AudioParameter::keyRouting), value) == NO_ERROR) {
1851            // when changing the audio output device, call addBatteryData to notify
1852            // the change
1853            if (mDevice != value) {
1854                uint32_t params = 0;
1855                // check whether speaker is on
1856                if (value & AudioSystem::DEVICE_OUT_SPEAKER) {
1857                    params |= IMediaPlayerService::kBatteryDataSpeakerOn;
1858                }
1859
1860                int deviceWithoutSpeaker
1861                    = AudioSystem::DEVICE_OUT_ALL & ~AudioSystem::DEVICE_OUT_SPEAKER;
1862                // check if any other device (except speaker) is on
1863                if (value & deviceWithoutSpeaker ) {
1864                    params |= IMediaPlayerService::kBatteryDataOtherAudioDeviceOn;
1865                }
1866
1867                if (params != 0) {
1868                    addBatteryData(params);
1869                }
1870            }
1871
1872            // forward device change to effects that have requested to be
1873            // aware of attached audio device.
1874            mDevice = (uint32_t)value;
1875            for (size_t i = 0; i < mEffectChains.size(); i++) {
1876                mEffectChains[i]->setDevice_l(mDevice);
1877            }
1878        }
1879
1880        if (status == NO_ERROR) {
1881            status = mOutput->setParameters(keyValuePair);
1882            if (!mStandby && status == INVALID_OPERATION) {
1883               mOutput->standby();
1884               mStandby = true;
1885               mBytesWritten = 0;
1886               status = mOutput->setParameters(keyValuePair);
1887            }
1888            if (status == NO_ERROR && reconfig) {
1889                delete mAudioMixer;
1890                readOutputParameters();
1891                mAudioMixer = new AudioMixer(mFrameCount, mSampleRate);
1892                for (size_t i = 0; i < mTracks.size() ; i++) {
1893                    int name = getTrackName_l();
1894                    if (name < 0) break;
1895                    mTracks[i]->mName = name;
1896                    // limit track sample rate to 2 x new output sample rate
1897                    if (mTracks[i]->mCblk->sampleRate > 2 * sampleRate()) {
1898                        mTracks[i]->mCblk->sampleRate = 2 * sampleRate();
1899                    }
1900                }
1901                sendConfigEvent_l(AudioSystem::OUTPUT_CONFIG_CHANGED);
1902            }
1903        }
1904
1905        mNewParameters.removeAt(0);
1906
1907        mParamStatus = status;
1908        mParamCond.signal();
1909        mWaitWorkCV.wait(mLock);
1910    }
1911    return reconfig;
1912}
1913
1914status_t AudioFlinger::MixerThread::dumpInternals(int fd, const Vector<String16>& args)
1915{
1916    const size_t SIZE = 256;
1917    char buffer[SIZE];
1918    String8 result;
1919
1920    PlaybackThread::dumpInternals(fd, args);
1921
1922    snprintf(buffer, SIZE, "AudioMixer tracks: %08x\n", mAudioMixer->trackNames());
1923    result.append(buffer);
1924    write(fd, result.string(), result.size());
1925    return NO_ERROR;
1926}
1927
1928uint32_t AudioFlinger::MixerThread::activeSleepTimeUs()
1929{
1930    return (uint32_t)(mOutput->latency() * 1000) / 2;
1931}
1932
1933uint32_t AudioFlinger::MixerThread::idleSleepTimeUs()
1934{
1935    return (uint32_t)(((mFrameCount * 1000) / mSampleRate) * 1000) / 2;
1936}
1937
1938uint32_t AudioFlinger::MixerThread::suspendSleepTimeUs()
1939{
1940    return (uint32_t)(((mFrameCount * 1000) / mSampleRate) * 1000);
1941}
1942
1943// ----------------------------------------------------------------------------
1944AudioFlinger::DirectOutputThread::DirectOutputThread(const sp<AudioFlinger>& audioFlinger, AudioStreamOut* output, int id, uint32_t device)
1945    :   PlaybackThread(audioFlinger, output, id, device)
1946{
1947    mType = PlaybackThread::DIRECT;
1948}
1949
1950AudioFlinger::DirectOutputThread::~DirectOutputThread()
1951{
1952}
1953
1954
1955static inline int16_t clamp16(int32_t sample)
1956{
1957    if ((sample>>15) ^ (sample>>31))
1958        sample = 0x7FFF ^ (sample>>31);
1959    return sample;
1960}
1961
1962static inline
1963int32_t mul(int16_t in, int16_t v)
1964{
1965#if defined(__arm__) && !defined(__thumb__)
1966    int32_t out;
1967    asm( "smulbb %[out], %[in], %[v] \n"
1968         : [out]"=r"(out)
1969         : [in]"%r"(in), [v]"r"(v)
1970         : );
1971    return out;
1972#else
1973    return in * int32_t(v);
1974#endif
1975}
1976
1977void AudioFlinger::DirectOutputThread::applyVolume(uint16_t leftVol, uint16_t rightVol, bool ramp)
1978{
1979    // Do not apply volume on compressed audio
1980    if (!AudioSystem::isLinearPCM(mFormat)) {
1981        return;
1982    }
1983
1984    // convert to signed 16 bit before volume calculation
1985    if (mFormat == AudioSystem::PCM_8_BIT) {
1986        size_t count = mFrameCount * mChannelCount;
1987        uint8_t *src = (uint8_t *)mMixBuffer + count-1;
1988        int16_t *dst = mMixBuffer + count-1;
1989        while(count--) {
1990            *dst-- = (int16_t)(*src--^0x80) << 8;
1991        }
1992    }
1993
1994    size_t frameCount = mFrameCount;
1995    int16_t *out = mMixBuffer;
1996    if (ramp) {
1997        if (mChannelCount == 1) {
1998            int32_t d = ((int32_t)leftVol - (int32_t)mLeftVolShort) << 16;
1999            int32_t vlInc = d / (int32_t)frameCount;
2000            int32_t vl = ((int32_t)mLeftVolShort << 16);
2001            do {
2002                out[0] = clamp16(mul(out[0], vl >> 16) >> 12);
2003                out++;
2004                vl += vlInc;
2005            } while (--frameCount);
2006
2007        } else {
2008            int32_t d = ((int32_t)leftVol - (int32_t)mLeftVolShort) << 16;
2009            int32_t vlInc = d / (int32_t)frameCount;
2010            d = ((int32_t)rightVol - (int32_t)mRightVolShort) << 16;
2011            int32_t vrInc = d / (int32_t)frameCount;
2012            int32_t vl = ((int32_t)mLeftVolShort << 16);
2013            int32_t vr = ((int32_t)mRightVolShort << 16);
2014            do {
2015                out[0] = clamp16(mul(out[0], vl >> 16) >> 12);
2016                out[1] = clamp16(mul(out[1], vr >> 16) >> 12);
2017                out += 2;
2018                vl += vlInc;
2019                vr += vrInc;
2020            } while (--frameCount);
2021        }
2022    } else {
2023        if (mChannelCount == 1) {
2024            do {
2025                out[0] = clamp16(mul(out[0], leftVol) >> 12);
2026                out++;
2027            } while (--frameCount);
2028        } else {
2029            do {
2030                out[0] = clamp16(mul(out[0], leftVol) >> 12);
2031                out[1] = clamp16(mul(out[1], rightVol) >> 12);
2032                out += 2;
2033            } while (--frameCount);
2034        }
2035    }
2036
2037    // convert back to unsigned 8 bit after volume calculation
2038    if (mFormat == AudioSystem::PCM_8_BIT) {
2039        size_t count = mFrameCount * mChannelCount;
2040        int16_t *src = mMixBuffer;
2041        uint8_t *dst = (uint8_t *)mMixBuffer;
2042        while(count--) {
2043            *dst++ = (uint8_t)(((int32_t)*src++ + (1<<7)) >> 8)^0x80;
2044        }
2045    }
2046
2047    mLeftVolShort = leftVol;
2048    mRightVolShort = rightVol;
2049}
2050
2051bool AudioFlinger::DirectOutputThread::threadLoop()
2052{
2053    uint32_t mixerStatus = MIXER_IDLE;
2054    sp<Track> trackToRemove;
2055    sp<Track> activeTrack;
2056    nsecs_t standbyTime = systemTime();
2057    int8_t *curBuf;
2058    size_t mixBufferSize = mFrameCount*mFrameSize;
2059    uint32_t activeSleepTime = activeSleepTimeUs();
2060    uint32_t idleSleepTime = idleSleepTimeUs();
2061    uint32_t sleepTime = idleSleepTime;
2062    // use shorter standby delay as on normal output to release
2063    // hardware resources as soon as possible
2064    nsecs_t standbyDelay = microseconds(activeSleepTime*2);
2065
2066    while (!exitPending())
2067    {
2068        bool rampVolume;
2069        uint16_t leftVol;
2070        uint16_t rightVol;
2071        Vector< sp<EffectChain> > effectChains;
2072
2073        processConfigEvents();
2074
2075        mixerStatus = MIXER_IDLE;
2076
2077        { // scope for the mLock
2078
2079            Mutex::Autolock _l(mLock);
2080
2081            if (checkForNewParameters_l()) {
2082                mixBufferSize = mFrameCount*mFrameSize;
2083                activeSleepTime = activeSleepTimeUs();
2084                idleSleepTime = idleSleepTimeUs();
2085                standbyDelay = microseconds(activeSleepTime*2);
2086            }
2087
2088            // put audio hardware into standby after short delay
2089            if UNLIKELY((!mActiveTracks.size() && systemTime() > standbyTime) ||
2090                        mSuspended) {
2091                // wait until we have something to do...
2092                if (!mStandby) {
2093                    LOGV("Audio hardware entering standby, mixer %p\n", this);
2094                    mOutput->standby();
2095                    mStandby = true;
2096                    mBytesWritten = 0;
2097                }
2098
2099                if (!mActiveTracks.size() && mConfigEvents.isEmpty()) {
2100                    // we're about to wait, flush the binder command buffer
2101                    IPCThreadState::self()->flushCommands();
2102
2103                    if (exitPending()) break;
2104
2105                    LOGV("DirectOutputThread %p TID %d going to sleep\n", this, gettid());
2106                    mWaitWorkCV.wait(mLock);
2107                    LOGV("DirectOutputThread %p TID %d waking up in active mode\n", this, gettid());
2108
2109                    if (mMasterMute == false) {
2110                        char value[PROPERTY_VALUE_MAX];
2111                        property_get("ro.audio.silent", value, "0");
2112                        if (atoi(value)) {
2113                            LOGD("Silence is golden");
2114                            setMasterMute(true);
2115                        }
2116                    }
2117
2118                    standbyTime = systemTime() + standbyDelay;
2119                    sleepTime = idleSleepTime;
2120                    continue;
2121                }
2122            }
2123
2124            effectChains = mEffectChains;
2125
2126            // find out which tracks need to be processed
2127            if (mActiveTracks.size() != 0) {
2128                sp<Track> t = mActiveTracks[0].promote();
2129                if (t == 0) continue;
2130
2131                Track* const track = t.get();
2132                audio_track_cblk_t* cblk = track->cblk();
2133
2134                // The first time a track is added we wait
2135                // for all its buffers to be filled before processing it
2136                if (cblk->framesReady() && track->isReady() &&
2137                        !track->isPaused() && !track->isTerminated())
2138                {
2139                    //LOGV("track %d u=%08x, s=%08x [OK]", track->name(), cblk->user, cblk->server);
2140
2141                    if (track->mFillingUpStatus == Track::FS_FILLED) {
2142                        track->mFillingUpStatus = Track::FS_ACTIVE;
2143                        mLeftVolFloat = mRightVolFloat = 0;
2144                        mLeftVolShort = mRightVolShort = 0;
2145                        if (track->mState == TrackBase::RESUMING) {
2146                            track->mState = TrackBase::ACTIVE;
2147                            rampVolume = true;
2148                        }
2149                    } else if (cblk->server != 0) {
2150                        // If the track is stopped before the first frame was mixed,
2151                        // do not apply ramp
2152                        rampVolume = true;
2153                    }
2154                    // compute volume for this track
2155                    float left, right;
2156                    if (track->isMuted() || mMasterMute || track->isPausing() ||
2157                        mStreamTypes[track->type()].mute) {
2158                        left = right = 0;
2159                        if (track->isPausing()) {
2160                            track->setPaused();
2161                        }
2162                    } else {
2163                        float typeVolume = mStreamTypes[track->type()].volume;
2164                        float v = mMasterVolume * typeVolume;
2165                        float v_clamped = v * cblk->volume[0];
2166                        if (v_clamped > MAX_GAIN) v_clamped = MAX_GAIN;
2167                        left = v_clamped/MAX_GAIN;
2168                        v_clamped = v * cblk->volume[1];
2169                        if (v_clamped > MAX_GAIN) v_clamped = MAX_GAIN;
2170                        right = v_clamped/MAX_GAIN;
2171                    }
2172
2173                    if (left != mLeftVolFloat || right != mRightVolFloat) {
2174                        mLeftVolFloat = left;
2175                        mRightVolFloat = right;
2176
2177                        // If audio HAL implements volume control,
2178                        // force software volume to nominal value
2179                        if (mOutput->setVolume(left, right) == NO_ERROR) {
2180                            left = 1.0f;
2181                            right = 1.0f;
2182                        }
2183
2184                        // Convert volumes from float to 8.24
2185                        uint32_t vl = (uint32_t)(left * (1 << 24));
2186                        uint32_t vr = (uint32_t)(right * (1 << 24));
2187
2188                        // Delegate volume control to effect in track effect chain if needed
2189                        // only one effect chain can be present on DirectOutputThread, so if
2190                        // there is one, the track is connected to it
2191                        if (!effectChains.isEmpty()) {
2192                            // Do not ramp volume if volume is controlled by effect
2193                            if(effectChains[0]->setVolume_l(&vl, &vr)) {
2194                                rampVolume = false;
2195                            }
2196                        }
2197
2198                        // Convert volumes from 8.24 to 4.12 format
2199                        uint32_t v_clamped = (vl + (1 << 11)) >> 12;
2200                        if (v_clamped > MAX_GAIN_INT) v_clamped = MAX_GAIN_INT;
2201                        leftVol = (uint16_t)v_clamped;
2202                        v_clamped = (vr + (1 << 11)) >> 12;
2203                        if (v_clamped > MAX_GAIN_INT) v_clamped = MAX_GAIN_INT;
2204                        rightVol = (uint16_t)v_clamped;
2205                    } else {
2206                        leftVol = mLeftVolShort;
2207                        rightVol = mRightVolShort;
2208                        rampVolume = false;
2209                    }
2210
2211                    // reset retry count
2212                    track->mRetryCount = kMaxTrackRetriesDirect;
2213                    activeTrack = t;
2214                    mixerStatus = MIXER_TRACKS_READY;
2215                } else {
2216                    //LOGV("track %d u=%08x, s=%08x [NOT READY]", track->name(), cblk->user, cblk->server);
2217                    if (track->isStopped()) {
2218                        track->reset();
2219                    }
2220                    if (track->isTerminated() || track->isStopped() || track->isPaused()) {
2221                        // We have consumed all the buffers of this track.
2222                        // Remove it from the list of active tracks.
2223                        trackToRemove = track;
2224                    } else {
2225                        // No buffers for this track. Give it a few chances to
2226                        // fill a buffer, then remove it from active list.
2227                        if (--(track->mRetryCount) <= 0) {
2228                            LOGV("BUFFER TIMEOUT: remove(%d) from active list", track->name());
2229                            trackToRemove = track;
2230                        } else {
2231                            mixerStatus = MIXER_TRACKS_ENABLED;
2232                        }
2233                    }
2234                }
2235            }
2236
2237            // remove all the tracks that need to be...
2238            if (UNLIKELY(trackToRemove != 0)) {
2239                mActiveTracks.remove(trackToRemove);
2240                if (!effectChains.isEmpty()) {
2241                    LOGV("stopping track on chain %p for session Id: %d", effectChains[0].get(),
2242                            trackToRemove->sessionId());
2243                    effectChains[0]->stopTrack();
2244                }
2245                if (trackToRemove->isTerminated()) {
2246                    mTracks.remove(trackToRemove);
2247                    deleteTrackName_l(trackToRemove->mName);
2248                }
2249            }
2250
2251            lockEffectChains_l(effectChains);
2252       }
2253
2254        if (LIKELY(mixerStatus == MIXER_TRACKS_READY)) {
2255            AudioBufferProvider::Buffer buffer;
2256            size_t frameCount = mFrameCount;
2257            curBuf = (int8_t *)mMixBuffer;
2258            // output audio to hardware
2259            while (frameCount) {
2260                buffer.frameCount = frameCount;
2261                activeTrack->getNextBuffer(&buffer);
2262                if (UNLIKELY(buffer.raw == 0)) {
2263                    memset(curBuf, 0, frameCount * mFrameSize);
2264                    break;
2265                }
2266                memcpy(curBuf, buffer.raw, buffer.frameCount * mFrameSize);
2267                frameCount -= buffer.frameCount;
2268                curBuf += buffer.frameCount * mFrameSize;
2269                activeTrack->releaseBuffer(&buffer);
2270            }
2271            sleepTime = 0;
2272            standbyTime = systemTime() + standbyDelay;
2273        } else {
2274            if (sleepTime == 0) {
2275                if (mixerStatus == MIXER_TRACKS_ENABLED) {
2276                    sleepTime = activeSleepTime;
2277                } else {
2278                    sleepTime = idleSleepTime;
2279                }
2280            } else if (mBytesWritten != 0 && AudioSystem::isLinearPCM(mFormat)) {
2281                memset (mMixBuffer, 0, mFrameCount * mFrameSize);
2282                sleepTime = 0;
2283            }
2284        }
2285
2286        if (mSuspended) {
2287            sleepTime = suspendSleepTimeUs();
2288        }
2289        // sleepTime == 0 means we must write to audio hardware
2290        if (sleepTime == 0) {
2291            if (mixerStatus == MIXER_TRACKS_READY) {
2292                applyVolume(leftVol, rightVol, rampVolume);
2293            }
2294            for (size_t i = 0; i < effectChains.size(); i ++) {
2295                effectChains[i]->process_l();
2296            }
2297            unlockEffectChains(effectChains);
2298
2299            mLastWriteTime = systemTime();
2300            mInWrite = true;
2301            mBytesWritten += mixBufferSize;
2302            int bytesWritten = (int)mOutput->write(mMixBuffer, mixBufferSize);
2303            if (bytesWritten < 0) mBytesWritten -= mixBufferSize;
2304            mNumWrites++;
2305            mInWrite = false;
2306            mStandby = false;
2307        } else {
2308            unlockEffectChains(effectChains);
2309            usleep(sleepTime);
2310        }
2311
2312        // finally let go of removed track, without the lock held
2313        // since we can't guarantee the destructors won't acquire that
2314        // same lock.
2315        trackToRemove.clear();
2316        activeTrack.clear();
2317
2318        // Effect chains will be actually deleted here if they were removed from
2319        // mEffectChains list during mixing or effects processing
2320        effectChains.clear();
2321    }
2322
2323    if (!mStandby) {
2324        mOutput->standby();
2325    }
2326
2327    LOGV("DirectOutputThread %p exiting", this);
2328    return false;
2329}
2330
2331// getTrackName_l() must be called with ThreadBase::mLock held
2332int AudioFlinger::DirectOutputThread::getTrackName_l()
2333{
2334    return 0;
2335}
2336
2337// deleteTrackName_l() must be called with ThreadBase::mLock held
2338void AudioFlinger::DirectOutputThread::deleteTrackName_l(int name)
2339{
2340}
2341
2342// checkForNewParameters_l() must be called with ThreadBase::mLock held
2343bool AudioFlinger::DirectOutputThread::checkForNewParameters_l()
2344{
2345    bool reconfig = false;
2346
2347    while (!mNewParameters.isEmpty()) {
2348        status_t status = NO_ERROR;
2349        String8 keyValuePair = mNewParameters[0];
2350        AudioParameter param = AudioParameter(keyValuePair);
2351        int value;
2352
2353        if (param.getInt(String8(AudioParameter::keyFrameCount), value) == NO_ERROR) {
2354            // do not accept frame count changes if tracks are open as the track buffer
2355            // size depends on frame count and correct behavior would not be garantied
2356            // if frame count is changed after track creation
2357            if (!mTracks.isEmpty()) {
2358                status = INVALID_OPERATION;
2359            } else {
2360                reconfig = true;
2361            }
2362        }
2363        if (status == NO_ERROR) {
2364            status = mOutput->setParameters(keyValuePair);
2365            if (!mStandby && status == INVALID_OPERATION) {
2366               mOutput->standby();
2367               mStandby = true;
2368               mBytesWritten = 0;
2369               status = mOutput->setParameters(keyValuePair);
2370            }
2371            if (status == NO_ERROR && reconfig) {
2372                readOutputParameters();
2373                sendConfigEvent_l(AudioSystem::OUTPUT_CONFIG_CHANGED);
2374            }
2375        }
2376
2377        mNewParameters.removeAt(0);
2378
2379        mParamStatus = status;
2380        mParamCond.signal();
2381        mWaitWorkCV.wait(mLock);
2382    }
2383    return reconfig;
2384}
2385
2386uint32_t AudioFlinger::DirectOutputThread::activeSleepTimeUs()
2387{
2388    uint32_t time;
2389    if (AudioSystem::isLinearPCM(mFormat)) {
2390        time = (uint32_t)(mOutput->latency() * 1000) / 2;
2391    } else {
2392        time = 10000;
2393    }
2394    return time;
2395}
2396
2397uint32_t AudioFlinger::DirectOutputThread::idleSleepTimeUs()
2398{
2399    uint32_t time;
2400    if (AudioSystem::isLinearPCM(mFormat)) {
2401        time = (uint32_t)(((mFrameCount * 1000) / mSampleRate) * 1000) / 2;
2402    } else {
2403        time = 10000;
2404    }
2405    return time;
2406}
2407
2408uint32_t AudioFlinger::DirectOutputThread::suspendSleepTimeUs()
2409{
2410    uint32_t time;
2411    if (AudioSystem::isLinearPCM(mFormat)) {
2412        time = (uint32_t)(((mFrameCount * 1000) / mSampleRate) * 1000);
2413    } else {
2414        time = 10000;
2415    }
2416    return time;
2417}
2418
2419
2420// ----------------------------------------------------------------------------
2421
2422AudioFlinger::DuplicatingThread::DuplicatingThread(const sp<AudioFlinger>& audioFlinger, AudioFlinger::MixerThread* mainThread, int id)
2423    :   MixerThread(audioFlinger, mainThread->getOutput(), id, mainThread->device()), mWaitTimeMs(UINT_MAX)
2424{
2425    mType = PlaybackThread::DUPLICATING;
2426    addOutputTrack(mainThread);
2427}
2428
2429AudioFlinger::DuplicatingThread::~DuplicatingThread()
2430{
2431    for (size_t i = 0; i < mOutputTracks.size(); i++) {
2432        mOutputTracks[i]->destroy();
2433    }
2434    mOutputTracks.clear();
2435}
2436
2437bool AudioFlinger::DuplicatingThread::threadLoop()
2438{
2439    Vector< sp<Track> > tracksToRemove;
2440    uint32_t mixerStatus = MIXER_IDLE;
2441    nsecs_t standbyTime = systemTime();
2442    size_t mixBufferSize = mFrameCount*mFrameSize;
2443    SortedVector< sp<OutputTrack> > outputTracks;
2444    uint32_t writeFrames = 0;
2445    uint32_t activeSleepTime = activeSleepTimeUs();
2446    uint32_t idleSleepTime = idleSleepTimeUs();
2447    uint32_t sleepTime = idleSleepTime;
2448    Vector< sp<EffectChain> > effectChains;
2449
2450    while (!exitPending())
2451    {
2452        processConfigEvents();
2453
2454        mixerStatus = MIXER_IDLE;
2455        { // scope for the mLock
2456
2457            Mutex::Autolock _l(mLock);
2458
2459            if (checkForNewParameters_l()) {
2460                mixBufferSize = mFrameCount*mFrameSize;
2461                updateWaitTime();
2462                activeSleepTime = activeSleepTimeUs();
2463                idleSleepTime = idleSleepTimeUs();
2464            }
2465
2466            const SortedVector< wp<Track> >& activeTracks = mActiveTracks;
2467
2468            for (size_t i = 0; i < mOutputTracks.size(); i++) {
2469                outputTracks.add(mOutputTracks[i]);
2470            }
2471
2472            // put audio hardware into standby after short delay
2473            if UNLIKELY((!activeTracks.size() && systemTime() > standbyTime) ||
2474                         mSuspended) {
2475                if (!mStandby) {
2476                    for (size_t i = 0; i < outputTracks.size(); i++) {
2477                        outputTracks[i]->stop();
2478                    }
2479                    mStandby = true;
2480                    mBytesWritten = 0;
2481                }
2482
2483                if (!activeTracks.size() && mConfigEvents.isEmpty()) {
2484                    // we're about to wait, flush the binder command buffer
2485                    IPCThreadState::self()->flushCommands();
2486                    outputTracks.clear();
2487
2488                    if (exitPending()) break;
2489
2490                    LOGV("DuplicatingThread %p TID %d going to sleep\n", this, gettid());
2491                    mWaitWorkCV.wait(mLock);
2492                    LOGV("DuplicatingThread %p TID %d waking up\n", this, gettid());
2493                    if (mMasterMute == false) {
2494                        char value[PROPERTY_VALUE_MAX];
2495                        property_get("ro.audio.silent", value, "0");
2496                        if (atoi(value)) {
2497                            LOGD("Silence is golden");
2498                            setMasterMute(true);
2499                        }
2500                    }
2501
2502                    standbyTime = systemTime() + kStandbyTimeInNsecs;
2503                    sleepTime = idleSleepTime;
2504                    continue;
2505                }
2506            }
2507
2508            mixerStatus = prepareTracks_l(activeTracks, &tracksToRemove);
2509
2510            // prevent any changes in effect chain list and in each effect chain
2511            // during mixing and effect process as the audio buffers could be deleted
2512            // or modified if an effect is created or deleted
2513            lockEffectChains_l(effectChains);
2514        }
2515
2516        if (LIKELY(mixerStatus == MIXER_TRACKS_READY)) {
2517            // mix buffers...
2518            if (outputsReady(outputTracks)) {
2519                mAudioMixer->process();
2520            } else {
2521                memset(mMixBuffer, 0, mixBufferSize);
2522            }
2523            sleepTime = 0;
2524            writeFrames = mFrameCount;
2525        } else {
2526            if (sleepTime == 0) {
2527                if (mixerStatus == MIXER_TRACKS_ENABLED) {
2528                    sleepTime = activeSleepTime;
2529                } else {
2530                    sleepTime = idleSleepTime;
2531                }
2532            } else if (mBytesWritten != 0) {
2533                // flush remaining overflow buffers in output tracks
2534                for (size_t i = 0; i < outputTracks.size(); i++) {
2535                    if (outputTracks[i]->isActive()) {
2536                        sleepTime = 0;
2537                        writeFrames = 0;
2538                        memset(mMixBuffer, 0, mixBufferSize);
2539                        break;
2540                    }
2541                }
2542            }
2543        }
2544
2545        if (mSuspended) {
2546            sleepTime = suspendSleepTimeUs();
2547        }
2548        // sleepTime == 0 means we must write to audio hardware
2549        if (sleepTime == 0) {
2550            for (size_t i = 0; i < effectChains.size(); i ++) {
2551                effectChains[i]->process_l();
2552            }
2553            // enable changes in effect chain
2554            unlockEffectChains(effectChains);
2555
2556            standbyTime = systemTime() + kStandbyTimeInNsecs;
2557            for (size_t i = 0; i < outputTracks.size(); i++) {
2558                outputTracks[i]->write(mMixBuffer, writeFrames);
2559            }
2560            mStandby = false;
2561            mBytesWritten += mixBufferSize;
2562        } else {
2563            // enable changes in effect chain
2564            unlockEffectChains(effectChains);
2565            usleep(sleepTime);
2566        }
2567
2568        // finally let go of all our tracks, without the lock held
2569        // since we can't guarantee the destructors won't acquire that
2570        // same lock.
2571        tracksToRemove.clear();
2572        outputTracks.clear();
2573
2574        // Effect chains will be actually deleted here if they were removed from
2575        // mEffectChains list during mixing or effects processing
2576        effectChains.clear();
2577    }
2578
2579    return false;
2580}
2581
2582void AudioFlinger::DuplicatingThread::addOutputTrack(MixerThread *thread)
2583{
2584    int frameCount = (3 * mFrameCount * mSampleRate) / thread->sampleRate();
2585    OutputTrack *outputTrack = new OutputTrack((ThreadBase *)thread,
2586                                            this,
2587                                            mSampleRate,
2588                                            mFormat,
2589                                            mChannelCount,
2590                                            frameCount);
2591    if (outputTrack->cblk() != NULL) {
2592        thread->setStreamVolume(AudioSystem::NUM_STREAM_TYPES, 1.0f);
2593        mOutputTracks.add(outputTrack);
2594        LOGV("addOutputTrack() track %p, on thread %p", outputTrack, thread);
2595        updateWaitTime();
2596    }
2597}
2598
2599void AudioFlinger::DuplicatingThread::removeOutputTrack(MixerThread *thread)
2600{
2601    Mutex::Autolock _l(mLock);
2602    for (size_t i = 0; i < mOutputTracks.size(); i++) {
2603        if (mOutputTracks[i]->thread() == (ThreadBase *)thread) {
2604            mOutputTracks[i]->destroy();
2605            mOutputTracks.removeAt(i);
2606            updateWaitTime();
2607            return;
2608        }
2609    }
2610    LOGV("removeOutputTrack(): unkonwn thread: %p", thread);
2611}
2612
2613void AudioFlinger::DuplicatingThread::updateWaitTime()
2614{
2615    mWaitTimeMs = UINT_MAX;
2616    for (size_t i = 0; i < mOutputTracks.size(); i++) {
2617        sp<ThreadBase> strong = mOutputTracks[i]->thread().promote();
2618        if (strong != NULL) {
2619            uint32_t waitTimeMs = (strong->frameCount() * 2 * 1000) / strong->sampleRate();
2620            if (waitTimeMs < mWaitTimeMs) {
2621                mWaitTimeMs = waitTimeMs;
2622            }
2623        }
2624    }
2625}
2626
2627
2628bool AudioFlinger::DuplicatingThread::outputsReady(SortedVector< sp<OutputTrack> > &outputTracks)
2629{
2630    for (size_t i = 0; i < outputTracks.size(); i++) {
2631        sp <ThreadBase> thread = outputTracks[i]->thread().promote();
2632        if (thread == 0) {
2633            LOGW("DuplicatingThread::outputsReady() could not promote thread on output track %p", outputTracks[i].get());
2634            return false;
2635        }
2636        PlaybackThread *playbackThread = (PlaybackThread *)thread.get();
2637        if (playbackThread->standby() && !playbackThread->isSuspended()) {
2638            LOGV("DuplicatingThread output track %p on thread %p Not Ready", outputTracks[i].get(), thread.get());
2639            return false;
2640        }
2641    }
2642    return true;
2643}
2644
2645uint32_t AudioFlinger::DuplicatingThread::activeSleepTimeUs()
2646{
2647    return (mWaitTimeMs * 1000) / 2;
2648}
2649
2650// ----------------------------------------------------------------------------
2651
2652// TrackBase constructor must be called with AudioFlinger::mLock held
2653AudioFlinger::ThreadBase::TrackBase::TrackBase(
2654            const wp<ThreadBase>& thread,
2655            const sp<Client>& client,
2656            uint32_t sampleRate,
2657            int format,
2658            int channelCount,
2659            int frameCount,
2660            uint32_t flags,
2661            const sp<IMemory>& sharedBuffer,
2662            int sessionId)
2663    :   RefBase(),
2664        mThread(thread),
2665        mClient(client),
2666        mCblk(0),
2667        mFrameCount(0),
2668        mState(IDLE),
2669        mClientTid(-1),
2670        mFormat(format),
2671        mFlags(flags & ~SYSTEM_FLAGS_MASK),
2672        mSessionId(sessionId)
2673{
2674    LOGV_IF(sharedBuffer != 0, "sharedBuffer: %p, size: %d", sharedBuffer->pointer(), sharedBuffer->size());
2675
2676    // LOGD("Creating track with %d buffers @ %d bytes", bufferCount, bufferSize);
2677   size_t size = sizeof(audio_track_cblk_t);
2678   size_t bufferSize = frameCount*channelCount*sizeof(int16_t);
2679   if (sharedBuffer == 0) {
2680       size += bufferSize;
2681   }
2682
2683   if (client != NULL) {
2684        mCblkMemory = client->heap()->allocate(size);
2685        if (mCblkMemory != 0) {
2686            mCblk = static_cast<audio_track_cblk_t *>(mCblkMemory->pointer());
2687            if (mCblk) { // construct the shared structure in-place.
2688                new(mCblk) audio_track_cblk_t();
2689                // clear all buffers
2690                mCblk->frameCount = frameCount;
2691                mCblk->sampleRate = sampleRate;
2692                mCblk->channelCount = (uint8_t)channelCount;
2693                if (sharedBuffer == 0) {
2694                    mBuffer = (char*)mCblk + sizeof(audio_track_cblk_t);
2695                    memset(mBuffer, 0, frameCount*channelCount*sizeof(int16_t));
2696                    // Force underrun condition to avoid false underrun callback until first data is
2697                    // written to buffer (other flags are cleared)
2698                    mCblk->flags = CBLK_UNDERRUN_ON;
2699                } else {
2700                    mBuffer = sharedBuffer->pointer();
2701                }
2702                mBufferEnd = (uint8_t *)mBuffer + bufferSize;
2703            }
2704        } else {
2705            LOGE("not enough memory for AudioTrack size=%u", size);
2706            client->heap()->dump("AudioTrack");
2707            return;
2708        }
2709   } else {
2710       mCblk = (audio_track_cblk_t *)(new uint8_t[size]);
2711       if (mCblk) { // construct the shared structure in-place.
2712           new(mCblk) audio_track_cblk_t();
2713           // clear all buffers
2714           mCblk->frameCount = frameCount;
2715           mCblk->sampleRate = sampleRate;
2716           mCblk->channelCount = (uint8_t)channelCount;
2717           mBuffer = (char*)mCblk + sizeof(audio_track_cblk_t);
2718           memset(mBuffer, 0, frameCount*channelCount*sizeof(int16_t));
2719           // Force underrun condition to avoid false underrun callback until first data is
2720           // written to buffer (other flags are cleared)
2721           mCblk->flags = CBLK_UNDERRUN_ON;
2722           mBufferEnd = (uint8_t *)mBuffer + bufferSize;
2723       }
2724   }
2725}
2726
2727AudioFlinger::ThreadBase::TrackBase::~TrackBase()
2728{
2729    if (mCblk) {
2730        mCblk->~audio_track_cblk_t();   // destroy our shared-structure.
2731        if (mClient == NULL) {
2732            delete mCblk;
2733        }
2734    }
2735    mCblkMemory.clear();            // and free the shared memory
2736    if (mClient != NULL) {
2737        Mutex::Autolock _l(mClient->audioFlinger()->mLock);
2738        mClient.clear();
2739    }
2740}
2741
2742void AudioFlinger::ThreadBase::TrackBase::releaseBuffer(AudioBufferProvider::Buffer* buffer)
2743{
2744    buffer->raw = 0;
2745    mFrameCount = buffer->frameCount;
2746    step();
2747    buffer->frameCount = 0;
2748}
2749
2750bool AudioFlinger::ThreadBase::TrackBase::step() {
2751    bool result;
2752    audio_track_cblk_t* cblk = this->cblk();
2753
2754    result = cblk->stepServer(mFrameCount);
2755    if (!result) {
2756        LOGV("stepServer failed acquiring cblk mutex");
2757        mFlags |= STEPSERVER_FAILED;
2758    }
2759    return result;
2760}
2761
2762void AudioFlinger::ThreadBase::TrackBase::reset() {
2763    audio_track_cblk_t* cblk = this->cblk();
2764
2765    cblk->user = 0;
2766    cblk->server = 0;
2767    cblk->userBase = 0;
2768    cblk->serverBase = 0;
2769    mFlags &= (uint32_t)(~SYSTEM_FLAGS_MASK);
2770    LOGV("TrackBase::reset");
2771}
2772
2773sp<IMemory> AudioFlinger::ThreadBase::TrackBase::getCblk() const
2774{
2775    return mCblkMemory;
2776}
2777
2778int AudioFlinger::ThreadBase::TrackBase::sampleRate() const {
2779    return (int)mCblk->sampleRate;
2780}
2781
2782int AudioFlinger::ThreadBase::TrackBase::channelCount() const {
2783    return (int)mCblk->channelCount;
2784}
2785
2786void* AudioFlinger::ThreadBase::TrackBase::getBuffer(uint32_t offset, uint32_t frames) const {
2787    audio_track_cblk_t* cblk = this->cblk();
2788    int8_t *bufferStart = (int8_t *)mBuffer + (offset-cblk->serverBase)*cblk->frameSize;
2789    int8_t *bufferEnd = bufferStart + frames * cblk->frameSize;
2790
2791    // Check validity of returned pointer in case the track control block would have been corrupted.
2792    if (bufferStart < mBuffer || bufferStart > bufferEnd || bufferEnd > mBufferEnd ||
2793        ((unsigned long)bufferStart & (unsigned long)(cblk->frameSize - 1))) {
2794        LOGE("TrackBase::getBuffer buffer out of range:\n    start: %p, end %p , mBuffer %p mBufferEnd %p\n    \
2795                server %d, serverBase %d, user %d, userBase %d, channelCount %d",
2796                bufferStart, bufferEnd, mBuffer, mBufferEnd,
2797                cblk->server, cblk->serverBase, cblk->user, cblk->userBase, cblk->channelCount);
2798        return 0;
2799    }
2800
2801    return bufferStart;
2802}
2803
2804// ----------------------------------------------------------------------------
2805
2806// Track constructor must be called with AudioFlinger::mLock and ThreadBase::mLock held
2807AudioFlinger::PlaybackThread::Track::Track(
2808            const wp<ThreadBase>& thread,
2809            const sp<Client>& client,
2810            int streamType,
2811            uint32_t sampleRate,
2812            int format,
2813            int channelCount,
2814            int frameCount,
2815            const sp<IMemory>& sharedBuffer,
2816            int sessionId)
2817    :   TrackBase(thread, client, sampleRate, format, channelCount, frameCount, 0, sharedBuffer, sessionId),
2818    mMute(false), mSharedBuffer(sharedBuffer), mName(-1), mMainBuffer(NULL), mAuxBuffer(NULL),
2819    mAuxEffectId(0), mHasVolumeController(false)
2820{
2821    if (mCblk != NULL) {
2822        sp<ThreadBase> baseThread = thread.promote();
2823        if (baseThread != 0) {
2824            PlaybackThread *playbackThread = (PlaybackThread *)baseThread.get();
2825            mName = playbackThread->getTrackName_l();
2826            mMainBuffer = playbackThread->mixBuffer();
2827        }
2828        LOGV("Track constructor name %d, calling thread %d", mName, IPCThreadState::self()->getCallingPid());
2829        if (mName < 0) {
2830            LOGE("no more track names available");
2831        }
2832        mVolume[0] = 1.0f;
2833        mVolume[1] = 1.0f;
2834        mStreamType = streamType;
2835        // NOTE: audio_track_cblk_t::frameSize for 8 bit PCM data is based on a sample size of
2836        // 16 bit because data is converted to 16 bit before being stored in buffer by AudioTrack
2837        mCblk->frameSize = AudioSystem::isLinearPCM(format) ? channelCount * sizeof(int16_t) : sizeof(int8_t);
2838    }
2839}
2840
2841AudioFlinger::PlaybackThread::Track::~Track()
2842{
2843    LOGV("PlaybackThread::Track destructor");
2844    sp<ThreadBase> thread = mThread.promote();
2845    if (thread != 0) {
2846        Mutex::Autolock _l(thread->mLock);
2847        mState = TERMINATED;
2848    }
2849}
2850
2851void AudioFlinger::PlaybackThread::Track::destroy()
2852{
2853    // NOTE: destroyTrack_l() can remove a strong reference to this Track
2854    // by removing it from mTracks vector, so there is a risk that this Tracks's
2855    // desctructor is called. As the destructor needs to lock mLock,
2856    // we must acquire a strong reference on this Track before locking mLock
2857    // here so that the destructor is called only when exiting this function.
2858    // On the other hand, as long as Track::destroy() is only called by
2859    // TrackHandle destructor, the TrackHandle still holds a strong ref on
2860    // this Track with its member mTrack.
2861    sp<Track> keep(this);
2862    { // scope for mLock
2863        sp<ThreadBase> thread = mThread.promote();
2864        if (thread != 0) {
2865            if (!isOutputTrack()) {
2866                if (mState == ACTIVE || mState == RESUMING) {
2867                    AudioSystem::stopOutput(thread->id(),
2868                                            (AudioSystem::stream_type)mStreamType,
2869                                            mSessionId);
2870
2871                    // to track the speaker usage
2872                    addBatteryData(IMediaPlayerService::kBatteryDataAudioFlingerStop);
2873                }
2874                AudioSystem::releaseOutput(thread->id());
2875            }
2876            Mutex::Autolock _l(thread->mLock);
2877            PlaybackThread *playbackThread = (PlaybackThread *)thread.get();
2878            playbackThread->destroyTrack_l(this);
2879        }
2880    }
2881}
2882
2883void AudioFlinger::PlaybackThread::Track::dump(char* buffer, size_t size)
2884{
2885    snprintf(buffer, size, "   %05d %05d %03u %03u %03u %05u   %04u %1d %1d %1d %05u %05u %05u  0x%08x 0x%08x 0x%08x 0x%08x\n",
2886            mName - AudioMixer::TRACK0,
2887            (mClient == NULL) ? getpid() : mClient->pid(),
2888            mStreamType,
2889            mFormat,
2890            mCblk->channelCount,
2891            mSessionId,
2892            mFrameCount,
2893            mState,
2894            mMute,
2895            mFillingUpStatus,
2896            mCblk->sampleRate,
2897            mCblk->volume[0],
2898            mCblk->volume[1],
2899            mCblk->server,
2900            mCblk->user,
2901            (int)mMainBuffer,
2902            (int)mAuxBuffer);
2903}
2904
2905status_t AudioFlinger::PlaybackThread::Track::getNextBuffer(AudioBufferProvider::Buffer* buffer)
2906{
2907     audio_track_cblk_t* cblk = this->cblk();
2908     uint32_t framesReady;
2909     uint32_t framesReq = buffer->frameCount;
2910
2911     // Check if last stepServer failed, try to step now
2912     if (mFlags & TrackBase::STEPSERVER_FAILED) {
2913         if (!step())  goto getNextBuffer_exit;
2914         LOGV("stepServer recovered");
2915         mFlags &= ~TrackBase::STEPSERVER_FAILED;
2916     }
2917
2918     framesReady = cblk->framesReady();
2919
2920     if (LIKELY(framesReady)) {
2921        uint32_t s = cblk->server;
2922        uint32_t bufferEnd = cblk->serverBase + cblk->frameCount;
2923
2924        bufferEnd = (cblk->loopEnd < bufferEnd) ? cblk->loopEnd : bufferEnd;
2925        if (framesReq > framesReady) {
2926            framesReq = framesReady;
2927        }
2928        if (s + framesReq > bufferEnd) {
2929            framesReq = bufferEnd - s;
2930        }
2931
2932         buffer->raw = getBuffer(s, framesReq);
2933         if (buffer->raw == 0) goto getNextBuffer_exit;
2934
2935         buffer->frameCount = framesReq;
2936        return NO_ERROR;
2937     }
2938
2939getNextBuffer_exit:
2940     buffer->raw = 0;
2941     buffer->frameCount = 0;
2942     LOGV("getNextBuffer() no more data for track %d on thread %p", mName, mThread.unsafe_get());
2943     return NOT_ENOUGH_DATA;
2944}
2945
2946bool AudioFlinger::PlaybackThread::Track::isReady() const {
2947    if (mFillingUpStatus != FS_FILLING || isStopped() || isPausing()) return true;
2948
2949    if (mCblk->framesReady() >= mCblk->frameCount ||
2950            (mCblk->flags & CBLK_FORCEREADY_MSK)) {
2951        mFillingUpStatus = FS_FILLED;
2952        mCblk->flags &= ~CBLK_FORCEREADY_MSK;
2953        return true;
2954    }
2955    return false;
2956}
2957
2958status_t AudioFlinger::PlaybackThread::Track::start()
2959{
2960    status_t status = NO_ERROR;
2961    LOGV("start(%d), calling thread %d session %d",
2962            mName, IPCThreadState::self()->getCallingPid(), mSessionId);
2963    sp<ThreadBase> thread = mThread.promote();
2964    if (thread != 0) {
2965        Mutex::Autolock _l(thread->mLock);
2966        int state = mState;
2967        // here the track could be either new, or restarted
2968        // in both cases "unstop" the track
2969        if (mState == PAUSED) {
2970            mState = TrackBase::RESUMING;
2971            LOGV("PAUSED => RESUMING (%d) on thread %p", mName, this);
2972        } else {
2973            mState = TrackBase::ACTIVE;
2974            LOGV("? => ACTIVE (%d) on thread %p", mName, this);
2975        }
2976
2977        if (!isOutputTrack() && state != ACTIVE && state != RESUMING) {
2978            thread->mLock.unlock();
2979            status = AudioSystem::startOutput(thread->id(),
2980                                              (AudioSystem::stream_type)mStreamType,
2981                                              mSessionId);
2982            thread->mLock.lock();
2983
2984            // to track the speaker usage
2985            if (status == NO_ERROR) {
2986                addBatteryData(IMediaPlayerService::kBatteryDataAudioFlingerStart);
2987            }
2988        }
2989        if (status == NO_ERROR) {
2990            PlaybackThread *playbackThread = (PlaybackThread *)thread.get();
2991            playbackThread->addTrack_l(this);
2992        } else {
2993            mState = state;
2994        }
2995    } else {
2996        status = BAD_VALUE;
2997    }
2998    return status;
2999}
3000
3001void AudioFlinger::PlaybackThread::Track::stop()
3002{
3003    LOGV("stop(%d), calling thread %d", mName, IPCThreadState::self()->getCallingPid());
3004    sp<ThreadBase> thread = mThread.promote();
3005    if (thread != 0) {
3006        Mutex::Autolock _l(thread->mLock);
3007        int state = mState;
3008        if (mState > STOPPED) {
3009            mState = STOPPED;
3010            // If the track is not active (PAUSED and buffers full), flush buffers
3011            PlaybackThread *playbackThread = (PlaybackThread *)thread.get();
3012            if (playbackThread->mActiveTracks.indexOf(this) < 0) {
3013                reset();
3014            }
3015            LOGV("(> STOPPED) => STOPPED (%d) on thread %p", mName, playbackThread);
3016        }
3017        if (!isOutputTrack() && (state == ACTIVE || state == RESUMING)) {
3018            thread->mLock.unlock();
3019            AudioSystem::stopOutput(thread->id(),
3020                                    (AudioSystem::stream_type)mStreamType,
3021                                    mSessionId);
3022            thread->mLock.lock();
3023
3024            // to track the speaker usage
3025            addBatteryData(IMediaPlayerService::kBatteryDataAudioFlingerStop);
3026        }
3027    }
3028}
3029
3030void AudioFlinger::PlaybackThread::Track::pause()
3031{
3032    LOGV("pause(%d), calling thread %d", mName, IPCThreadState::self()->getCallingPid());
3033    sp<ThreadBase> thread = mThread.promote();
3034    if (thread != 0) {
3035        Mutex::Autolock _l(thread->mLock);
3036        if (mState == ACTIVE || mState == RESUMING) {
3037            mState = PAUSING;
3038            LOGV("ACTIVE/RESUMING => PAUSING (%d) on thread %p", mName, thread.get());
3039            if (!isOutputTrack()) {
3040                thread->mLock.unlock();
3041                AudioSystem::stopOutput(thread->id(),
3042                                        (AudioSystem::stream_type)mStreamType,
3043                                        mSessionId);
3044                thread->mLock.lock();
3045
3046                // to track the speaker usage
3047                addBatteryData(IMediaPlayerService::kBatteryDataAudioFlingerStop);
3048            }
3049        }
3050    }
3051}
3052
3053void AudioFlinger::PlaybackThread::Track::flush()
3054{
3055    LOGV("flush(%d)", mName);
3056    sp<ThreadBase> thread = mThread.promote();
3057    if (thread != 0) {
3058        Mutex::Autolock _l(thread->mLock);
3059        if (mState != STOPPED && mState != PAUSED && mState != PAUSING) {
3060            return;
3061        }
3062        // No point remaining in PAUSED state after a flush => go to
3063        // STOPPED state
3064        mState = STOPPED;
3065
3066        mCblk->lock.lock();
3067        // NOTE: reset() will reset cblk->user and cblk->server with
3068        // the risk that at the same time, the AudioMixer is trying to read
3069        // data. In this case, getNextBuffer() would return a NULL pointer
3070        // as audio buffer => the AudioMixer code MUST always test that pointer
3071        // returned by getNextBuffer() is not NULL!
3072        reset();
3073        mCblk->lock.unlock();
3074    }
3075}
3076
3077void AudioFlinger::PlaybackThread::Track::reset()
3078{
3079    // Do not reset twice to avoid discarding data written just after a flush and before
3080    // the audioflinger thread detects the track is stopped.
3081    if (!mResetDone) {
3082        TrackBase::reset();
3083        // Force underrun condition to avoid false underrun callback until first data is
3084        // written to buffer
3085        mCblk->flags |= CBLK_UNDERRUN_ON;
3086        mCblk->flags &= ~CBLK_FORCEREADY_MSK;
3087        mFillingUpStatus = FS_FILLING;
3088        mResetDone = true;
3089    }
3090}
3091
3092void AudioFlinger::PlaybackThread::Track::mute(bool muted)
3093{
3094    mMute = muted;
3095}
3096
3097void AudioFlinger::PlaybackThread::Track::setVolume(float left, float right)
3098{
3099    mVolume[0] = left;
3100    mVolume[1] = right;
3101}
3102
3103status_t AudioFlinger::PlaybackThread::Track::attachAuxEffect(int EffectId)
3104{
3105    status_t status = DEAD_OBJECT;
3106    sp<ThreadBase> thread = mThread.promote();
3107    if (thread != 0) {
3108       PlaybackThread *playbackThread = (PlaybackThread *)thread.get();
3109       status = playbackThread->attachAuxEffect(this, EffectId);
3110    }
3111    return status;
3112}
3113
3114void AudioFlinger::PlaybackThread::Track::setAuxBuffer(int EffectId, int32_t *buffer)
3115{
3116    mAuxEffectId = EffectId;
3117    mAuxBuffer = buffer;
3118}
3119
3120// ----------------------------------------------------------------------------
3121
3122// RecordTrack constructor must be called with AudioFlinger::mLock held
3123AudioFlinger::RecordThread::RecordTrack::RecordTrack(
3124            const wp<ThreadBase>& thread,
3125            const sp<Client>& client,
3126            uint32_t sampleRate,
3127            int format,
3128            int channelCount,
3129            int frameCount,
3130            uint32_t flags,
3131            int sessionId)
3132    :   TrackBase(thread, client, sampleRate, format,
3133                  channelCount, frameCount, flags, 0, sessionId),
3134        mOverflow(false)
3135{
3136    if (mCblk != NULL) {
3137       LOGV("RecordTrack constructor, size %d", (int)mBufferEnd - (int)mBuffer);
3138       if (format == AudioSystem::PCM_16_BIT) {
3139           mCblk->frameSize = channelCount * sizeof(int16_t);
3140       } else if (format == AudioSystem::PCM_8_BIT) {
3141           mCblk->frameSize = channelCount * sizeof(int8_t);
3142       } else {
3143           mCblk->frameSize = sizeof(int8_t);
3144       }
3145    }
3146}
3147
3148AudioFlinger::RecordThread::RecordTrack::~RecordTrack()
3149{
3150    sp<ThreadBase> thread = mThread.promote();
3151    if (thread != 0) {
3152        AudioSystem::releaseInput(thread->id());
3153    }
3154}
3155
3156status_t AudioFlinger::RecordThread::RecordTrack::getNextBuffer(AudioBufferProvider::Buffer* buffer)
3157{
3158    audio_track_cblk_t* cblk = this->cblk();
3159    uint32_t framesAvail;
3160    uint32_t framesReq = buffer->frameCount;
3161
3162     // Check if last stepServer failed, try to step now
3163    if (mFlags & TrackBase::STEPSERVER_FAILED) {
3164        if (!step()) goto getNextBuffer_exit;
3165        LOGV("stepServer recovered");
3166        mFlags &= ~TrackBase::STEPSERVER_FAILED;
3167    }
3168
3169    framesAvail = cblk->framesAvailable_l();
3170
3171    if (LIKELY(framesAvail)) {
3172        uint32_t s = cblk->server;
3173        uint32_t bufferEnd = cblk->serverBase + cblk->frameCount;
3174
3175        if (framesReq > framesAvail) {
3176            framesReq = framesAvail;
3177        }
3178        if (s + framesReq > bufferEnd) {
3179            framesReq = bufferEnd - s;
3180        }
3181
3182        buffer->raw = getBuffer(s, framesReq);
3183        if (buffer->raw == 0) goto getNextBuffer_exit;
3184
3185        buffer->frameCount = framesReq;
3186        return NO_ERROR;
3187    }
3188
3189getNextBuffer_exit:
3190    buffer->raw = 0;
3191    buffer->frameCount = 0;
3192    return NOT_ENOUGH_DATA;
3193}
3194
3195status_t AudioFlinger::RecordThread::RecordTrack::start()
3196{
3197    sp<ThreadBase> thread = mThread.promote();
3198    if (thread != 0) {
3199        RecordThread *recordThread = (RecordThread *)thread.get();
3200        return recordThread->start(this);
3201    } else {
3202        return BAD_VALUE;
3203    }
3204}
3205
3206void AudioFlinger::RecordThread::RecordTrack::stop()
3207{
3208    sp<ThreadBase> thread = mThread.promote();
3209    if (thread != 0) {
3210        RecordThread *recordThread = (RecordThread *)thread.get();
3211        recordThread->stop(this);
3212        TrackBase::reset();
3213        // Force overerrun condition to avoid false overrun callback until first data is
3214        // read from buffer
3215        mCblk->flags |= CBLK_UNDERRUN_ON;
3216    }
3217}
3218
3219void AudioFlinger::RecordThread::RecordTrack::dump(char* buffer, size_t size)
3220{
3221    snprintf(buffer, size, "   %05d %03u %03u %05d   %04u %01d %05u  %08x %08x\n",
3222            (mClient == NULL) ? getpid() : mClient->pid(),
3223            mFormat,
3224            mCblk->channelCount,
3225            mSessionId,
3226            mFrameCount,
3227            mState,
3228            mCblk->sampleRate,
3229            mCblk->server,
3230            mCblk->user);
3231}
3232
3233
3234// ----------------------------------------------------------------------------
3235
3236AudioFlinger::PlaybackThread::OutputTrack::OutputTrack(
3237            const wp<ThreadBase>& thread,
3238            DuplicatingThread *sourceThread,
3239            uint32_t sampleRate,
3240            int format,
3241            int channelCount,
3242            int frameCount)
3243    :   Track(thread, NULL, AudioSystem::NUM_STREAM_TYPES, sampleRate, format, channelCount, frameCount, NULL, 0),
3244    mActive(false), mSourceThread(sourceThread)
3245{
3246
3247    PlaybackThread *playbackThread = (PlaybackThread *)thread.unsafe_get();
3248    if (mCblk != NULL) {
3249        mCblk->flags |= CBLK_DIRECTION_OUT;
3250        mCblk->buffers = (char*)mCblk + sizeof(audio_track_cblk_t);
3251        mCblk->volume[0] = mCblk->volume[1] = 0x1000;
3252        mOutBuffer.frameCount = 0;
3253        playbackThread->mTracks.add(this);
3254        LOGV("OutputTrack constructor mCblk %p, mBuffer %p, mCblk->buffers %p, mCblk->frameCount %d, mCblk->sampleRate %d, mCblk->channelCount %d mBufferEnd %p",
3255                mCblk, mBuffer, mCblk->buffers, mCblk->frameCount, mCblk->sampleRate, mCblk->channelCount, mBufferEnd);
3256    } else {
3257        LOGW("Error creating output track on thread %p", playbackThread);
3258    }
3259}
3260
3261AudioFlinger::PlaybackThread::OutputTrack::~OutputTrack()
3262{
3263    clearBufferQueue();
3264}
3265
3266status_t AudioFlinger::PlaybackThread::OutputTrack::start()
3267{
3268    status_t status = Track::start();
3269    if (status != NO_ERROR) {
3270        return status;
3271    }
3272
3273    mActive = true;
3274    mRetryCount = 127;
3275    return status;
3276}
3277
3278void AudioFlinger::PlaybackThread::OutputTrack::stop()
3279{
3280    Track::stop();
3281    clearBufferQueue();
3282    mOutBuffer.frameCount = 0;
3283    mActive = false;
3284}
3285
3286bool AudioFlinger::PlaybackThread::OutputTrack::write(int16_t* data, uint32_t frames)
3287{
3288    Buffer *pInBuffer;
3289    Buffer inBuffer;
3290    uint32_t channelCount = mCblk->channelCount;
3291    bool outputBufferFull = false;
3292    inBuffer.frameCount = frames;
3293    inBuffer.i16 = data;
3294
3295    uint32_t waitTimeLeftMs = mSourceThread->waitTimeMs();
3296
3297    if (!mActive && frames != 0) {
3298        start();
3299        sp<ThreadBase> thread = mThread.promote();
3300        if (thread != 0) {
3301            MixerThread *mixerThread = (MixerThread *)thread.get();
3302            if (mCblk->frameCount > frames){
3303                if (mBufferQueue.size() < kMaxOverFlowBuffers) {
3304                    uint32_t startFrames = (mCblk->frameCount - frames);
3305                    pInBuffer = new Buffer;
3306                    pInBuffer->mBuffer = new int16_t[startFrames * channelCount];
3307                    pInBuffer->frameCount = startFrames;
3308                    pInBuffer->i16 = pInBuffer->mBuffer;
3309                    memset(pInBuffer->raw, 0, startFrames * channelCount * sizeof(int16_t));
3310                    mBufferQueue.add(pInBuffer);
3311                } else {
3312                    LOGW ("OutputTrack::write() %p no more buffers in queue", this);
3313                }
3314            }
3315        }
3316    }
3317
3318    while (waitTimeLeftMs) {
3319        // First write pending buffers, then new data
3320        if (mBufferQueue.size()) {
3321            pInBuffer = mBufferQueue.itemAt(0);
3322        } else {
3323            pInBuffer = &inBuffer;
3324        }
3325
3326        if (pInBuffer->frameCount == 0) {
3327            break;
3328        }
3329
3330        if (mOutBuffer.frameCount == 0) {
3331            mOutBuffer.frameCount = pInBuffer->frameCount;
3332            nsecs_t startTime = systemTime();
3333            if (obtainBuffer(&mOutBuffer, waitTimeLeftMs) == (status_t)AudioTrack::NO_MORE_BUFFERS) {
3334                LOGV ("OutputTrack::write() %p thread %p no more output buffers", this, mThread.unsafe_get());
3335                outputBufferFull = true;
3336                break;
3337            }
3338            uint32_t waitTimeMs = (uint32_t)ns2ms(systemTime() - startTime);
3339            if (waitTimeLeftMs >= waitTimeMs) {
3340                waitTimeLeftMs -= waitTimeMs;
3341            } else {
3342                waitTimeLeftMs = 0;
3343            }
3344        }
3345
3346        uint32_t outFrames = pInBuffer->frameCount > mOutBuffer.frameCount ? mOutBuffer.frameCount : pInBuffer->frameCount;
3347        memcpy(mOutBuffer.raw, pInBuffer->raw, outFrames * channelCount * sizeof(int16_t));
3348        mCblk->stepUser(outFrames);
3349        pInBuffer->frameCount -= outFrames;
3350        pInBuffer->i16 += outFrames * channelCount;
3351        mOutBuffer.frameCount -= outFrames;
3352        mOutBuffer.i16 += outFrames * channelCount;
3353
3354        if (pInBuffer->frameCount == 0) {
3355            if (mBufferQueue.size()) {
3356                mBufferQueue.removeAt(0);
3357                delete [] pInBuffer->mBuffer;
3358                delete pInBuffer;
3359                LOGV("OutputTrack::write() %p thread %p released overflow buffer %d", this, mThread.unsafe_get(), mBufferQueue.size());
3360            } else {
3361                break;
3362            }
3363        }
3364    }
3365
3366    // If we could not write all frames, allocate a buffer and queue it for next time.
3367    if (inBuffer.frameCount) {
3368        sp<ThreadBase> thread = mThread.promote();
3369        if (thread != 0 && !thread->standby()) {
3370            if (mBufferQueue.size() < kMaxOverFlowBuffers) {
3371                pInBuffer = new Buffer;
3372                pInBuffer->mBuffer = new int16_t[inBuffer.frameCount * channelCount];
3373                pInBuffer->frameCount = inBuffer.frameCount;
3374                pInBuffer->i16 = pInBuffer->mBuffer;
3375                memcpy(pInBuffer->raw, inBuffer.raw, inBuffer.frameCount * channelCount * sizeof(int16_t));
3376                mBufferQueue.add(pInBuffer);
3377                LOGV("OutputTrack::write() %p thread %p adding overflow buffer %d", this, mThread.unsafe_get(), mBufferQueue.size());
3378            } else {
3379                LOGW("OutputTrack::write() %p thread %p no more overflow buffers", mThread.unsafe_get(), this);
3380            }
3381        }
3382    }
3383
3384    // Calling write() with a 0 length buffer, means that no more data will be written:
3385    // If no more buffers are pending, fill output track buffer to make sure it is started
3386    // by output mixer.
3387    if (frames == 0 && mBufferQueue.size() == 0) {
3388        if (mCblk->user < mCblk->frameCount) {
3389            frames = mCblk->frameCount - mCblk->user;
3390            pInBuffer = new Buffer;
3391            pInBuffer->mBuffer = new int16_t[frames * channelCount];
3392            pInBuffer->frameCount = frames;
3393            pInBuffer->i16 = pInBuffer->mBuffer;
3394            memset(pInBuffer->raw, 0, frames * channelCount * sizeof(int16_t));
3395            mBufferQueue.add(pInBuffer);
3396        } else if (mActive) {
3397            stop();
3398        }
3399    }
3400
3401    return outputBufferFull;
3402}
3403
3404status_t AudioFlinger::PlaybackThread::OutputTrack::obtainBuffer(AudioBufferProvider::Buffer* buffer, uint32_t waitTimeMs)
3405{
3406    int active;
3407    status_t result;
3408    audio_track_cblk_t* cblk = mCblk;
3409    uint32_t framesReq = buffer->frameCount;
3410
3411//    LOGV("OutputTrack::obtainBuffer user %d, server %d", cblk->user, cblk->server);
3412    buffer->frameCount  = 0;
3413
3414    uint32_t framesAvail = cblk->framesAvailable();
3415
3416
3417    if (framesAvail == 0) {
3418        Mutex::Autolock _l(cblk->lock);
3419        goto start_loop_here;
3420        while (framesAvail == 0) {
3421            active = mActive;
3422            if (UNLIKELY(!active)) {
3423                LOGV("Not active and NO_MORE_BUFFERS");
3424                return AudioTrack::NO_MORE_BUFFERS;
3425            }
3426            result = cblk->cv.waitRelative(cblk->lock, milliseconds(waitTimeMs));
3427            if (result != NO_ERROR) {
3428                return AudioTrack::NO_MORE_BUFFERS;
3429            }
3430            // read the server count again
3431        start_loop_here:
3432            framesAvail = cblk->framesAvailable_l();
3433        }
3434    }
3435
3436//    if (framesAvail < framesReq) {
3437//        return AudioTrack::NO_MORE_BUFFERS;
3438//    }
3439
3440    if (framesReq > framesAvail) {
3441        framesReq = framesAvail;
3442    }
3443
3444    uint32_t u = cblk->user;
3445    uint32_t bufferEnd = cblk->userBase + cblk->frameCount;
3446
3447    if (u + framesReq > bufferEnd) {
3448        framesReq = bufferEnd - u;
3449    }
3450
3451    buffer->frameCount  = framesReq;
3452    buffer->raw         = (void *)cblk->buffer(u);
3453    return NO_ERROR;
3454}
3455
3456
3457void AudioFlinger::PlaybackThread::OutputTrack::clearBufferQueue()
3458{
3459    size_t size = mBufferQueue.size();
3460    Buffer *pBuffer;
3461
3462    for (size_t i = 0; i < size; i++) {
3463        pBuffer = mBufferQueue.itemAt(i);
3464        delete [] pBuffer->mBuffer;
3465        delete pBuffer;
3466    }
3467    mBufferQueue.clear();
3468}
3469
3470// ----------------------------------------------------------------------------
3471
3472AudioFlinger::Client::Client(const sp<AudioFlinger>& audioFlinger, pid_t pid)
3473    :   RefBase(),
3474        mAudioFlinger(audioFlinger),
3475        mMemoryDealer(new MemoryDealer(1024*1024, "AudioFlinger::Client")),
3476        mPid(pid)
3477{
3478    // 1 MB of address space is good for 32 tracks, 8 buffers each, 4 KB/buffer
3479}
3480
3481// Client destructor must be called with AudioFlinger::mLock held
3482AudioFlinger::Client::~Client()
3483{
3484    mAudioFlinger->removeClient_l(mPid);
3485}
3486
3487const sp<MemoryDealer>& AudioFlinger::Client::heap() const
3488{
3489    return mMemoryDealer;
3490}
3491
3492// ----------------------------------------------------------------------------
3493
3494AudioFlinger::NotificationClient::NotificationClient(const sp<AudioFlinger>& audioFlinger,
3495                                                     const sp<IAudioFlingerClient>& client,
3496                                                     pid_t pid)
3497    : mAudioFlinger(audioFlinger), mPid(pid), mClient(client)
3498{
3499}
3500
3501AudioFlinger::NotificationClient::~NotificationClient()
3502{
3503    mClient.clear();
3504}
3505
3506void AudioFlinger::NotificationClient::binderDied(const wp<IBinder>& who)
3507{
3508    sp<NotificationClient> keep(this);
3509    {
3510        mAudioFlinger->removeNotificationClient(mPid);
3511    }
3512}
3513
3514// ----------------------------------------------------------------------------
3515
3516AudioFlinger::TrackHandle::TrackHandle(const sp<AudioFlinger::PlaybackThread::Track>& track)
3517    : BnAudioTrack(),
3518      mTrack(track)
3519{
3520}
3521
3522AudioFlinger::TrackHandle::~TrackHandle() {
3523    // just stop the track on deletion, associated resources
3524    // will be freed from the main thread once all pending buffers have
3525    // been played. Unless it's not in the active track list, in which
3526    // case we free everything now...
3527    mTrack->destroy();
3528}
3529
3530status_t AudioFlinger::TrackHandle::start() {
3531    return mTrack->start();
3532}
3533
3534void AudioFlinger::TrackHandle::stop() {
3535    mTrack->stop();
3536}
3537
3538void AudioFlinger::TrackHandle::flush() {
3539    mTrack->flush();
3540}
3541
3542void AudioFlinger::TrackHandle::mute(bool e) {
3543    mTrack->mute(e);
3544}
3545
3546void AudioFlinger::TrackHandle::pause() {
3547    mTrack->pause();
3548}
3549
3550void AudioFlinger::TrackHandle::setVolume(float left, float right) {
3551    mTrack->setVolume(left, right);
3552}
3553
3554sp<IMemory> AudioFlinger::TrackHandle::getCblk() const {
3555    return mTrack->getCblk();
3556}
3557
3558status_t AudioFlinger::TrackHandle::attachAuxEffect(int EffectId)
3559{
3560    return mTrack->attachAuxEffect(EffectId);
3561}
3562
3563status_t AudioFlinger::TrackHandle::onTransact(
3564    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
3565{
3566    return BnAudioTrack::onTransact(code, data, reply, flags);
3567}
3568
3569// ----------------------------------------------------------------------------
3570
3571sp<IAudioRecord> AudioFlinger::openRecord(
3572        pid_t pid,
3573        int input,
3574        uint32_t sampleRate,
3575        int format,
3576        int channelCount,
3577        int frameCount,
3578        uint32_t flags,
3579        int *sessionId,
3580        status_t *status)
3581{
3582    sp<RecordThread::RecordTrack> recordTrack;
3583    sp<RecordHandle> recordHandle;
3584    sp<Client> client;
3585    wp<Client> wclient;
3586    status_t lStatus;
3587    RecordThread *thread;
3588    size_t inFrameCount;
3589    int lSessionId;
3590
3591    // check calling permissions
3592    if (!recordingAllowed()) {
3593        lStatus = PERMISSION_DENIED;
3594        goto Exit;
3595    }
3596
3597    // add client to list
3598    { // scope for mLock
3599        Mutex::Autolock _l(mLock);
3600        thread = checkRecordThread_l(input);
3601        if (thread == NULL) {
3602            lStatus = BAD_VALUE;
3603            goto Exit;
3604        }
3605
3606        wclient = mClients.valueFor(pid);
3607        if (wclient != NULL) {
3608            client = wclient.promote();
3609        } else {
3610            client = new Client(this, pid);
3611            mClients.add(pid, client);
3612        }
3613
3614        // If no audio session id is provided, create one here
3615        if (sessionId != NULL && *sessionId != AudioSystem::SESSION_OUTPUT_MIX) {
3616            lSessionId = *sessionId;
3617        } else {
3618            lSessionId = nextUniqueId_l();
3619            if (sessionId != NULL) {
3620                *sessionId = lSessionId;
3621            }
3622        }
3623        // create new record track. The record track uses one track in mHardwareMixerThread by convention.
3624        recordTrack = new RecordThread::RecordTrack(thread, client, sampleRate,
3625                                                   format, channelCount, frameCount, flags, lSessionId);
3626    }
3627    if (recordTrack->getCblk() == NULL) {
3628        // remove local strong reference to Client before deleting the RecordTrack so that the Client
3629        // destructor is called by the TrackBase destructor with mLock held
3630        client.clear();
3631        recordTrack.clear();
3632        lStatus = NO_MEMORY;
3633        goto Exit;
3634    }
3635
3636    // return to handle to client
3637    recordHandle = new RecordHandle(recordTrack);
3638    lStatus = NO_ERROR;
3639
3640Exit:
3641    if (status) {
3642        *status = lStatus;
3643    }
3644    return recordHandle;
3645}
3646
3647// ----------------------------------------------------------------------------
3648
3649AudioFlinger::RecordHandle::RecordHandle(const sp<AudioFlinger::RecordThread::RecordTrack>& recordTrack)
3650    : BnAudioRecord(),
3651    mRecordTrack(recordTrack)
3652{
3653}
3654
3655AudioFlinger::RecordHandle::~RecordHandle() {
3656    stop();
3657}
3658
3659status_t AudioFlinger::RecordHandle::start() {
3660    LOGV("RecordHandle::start()");
3661    return mRecordTrack->start();
3662}
3663
3664void AudioFlinger::RecordHandle::stop() {
3665    LOGV("RecordHandle::stop()");
3666    mRecordTrack->stop();
3667}
3668
3669sp<IMemory> AudioFlinger::RecordHandle::getCblk() const {
3670    return mRecordTrack->getCblk();
3671}
3672
3673status_t AudioFlinger::RecordHandle::onTransact(
3674    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
3675{
3676    return BnAudioRecord::onTransact(code, data, reply, flags);
3677}
3678
3679// ----------------------------------------------------------------------------
3680
3681AudioFlinger::RecordThread::RecordThread(const sp<AudioFlinger>& audioFlinger, AudioStreamIn *input, uint32_t sampleRate, uint32_t channels, int id) :
3682    ThreadBase(audioFlinger, id),
3683    mInput(input), mResampler(0), mRsmpOutBuffer(0), mRsmpInBuffer(0)
3684{
3685    mReqChannelCount = AudioSystem::popCount(channels);
3686    mReqSampleRate = sampleRate;
3687    readInputParameters();
3688}
3689
3690
3691AudioFlinger::RecordThread::~RecordThread()
3692{
3693    delete[] mRsmpInBuffer;
3694    if (mResampler != 0) {
3695        delete mResampler;
3696        delete[] mRsmpOutBuffer;
3697    }
3698}
3699
3700void AudioFlinger::RecordThread::onFirstRef()
3701{
3702    const size_t SIZE = 256;
3703    char buffer[SIZE];
3704
3705    snprintf(buffer, SIZE, "Record Thread %p", this);
3706
3707    run(buffer, PRIORITY_URGENT_AUDIO);
3708}
3709
3710bool AudioFlinger::RecordThread::threadLoop()
3711{
3712    AudioBufferProvider::Buffer buffer;
3713    sp<RecordTrack> activeTrack;
3714
3715    nsecs_t lastWarning = 0;
3716
3717    // start recording
3718    while (!exitPending()) {
3719
3720        processConfigEvents();
3721
3722        { // scope for mLock
3723            Mutex::Autolock _l(mLock);
3724            checkForNewParameters_l();
3725            if (mActiveTrack == 0 && mConfigEvents.isEmpty()) {
3726                if (!mStandby) {
3727                    mInput->standby();
3728                    mStandby = true;
3729                }
3730
3731                if (exitPending()) break;
3732
3733                LOGV("RecordThread: loop stopping");
3734                // go to sleep
3735                mWaitWorkCV.wait(mLock);
3736                LOGV("RecordThread: loop starting");
3737                continue;
3738            }
3739            if (mActiveTrack != 0) {
3740                if (mActiveTrack->mState == TrackBase::PAUSING) {
3741                    if (!mStandby) {
3742                        mInput->standby();
3743                        mStandby = true;
3744                    }
3745                    mActiveTrack.clear();
3746                    mStartStopCond.broadcast();
3747                } else if (mActiveTrack->mState == TrackBase::RESUMING) {
3748                    if (mReqChannelCount != mActiveTrack->channelCount()) {
3749                        mActiveTrack.clear();
3750                        mStartStopCond.broadcast();
3751                    } else if (mBytesRead != 0) {
3752                        // record start succeeds only if first read from audio input
3753                        // succeeds
3754                        if (mBytesRead > 0) {
3755                            mActiveTrack->mState = TrackBase::ACTIVE;
3756                        } else {
3757                            mActiveTrack.clear();
3758                        }
3759                        mStartStopCond.broadcast();
3760                    }
3761                    mStandby = false;
3762                }
3763            }
3764        }
3765
3766        if (mActiveTrack != 0) {
3767            if (mActiveTrack->mState != TrackBase::ACTIVE &&
3768                mActiveTrack->mState != TrackBase::RESUMING) {
3769                usleep(5000);
3770                continue;
3771            }
3772            buffer.frameCount = mFrameCount;
3773            if (LIKELY(mActiveTrack->getNextBuffer(&buffer) == NO_ERROR)) {
3774                size_t framesOut = buffer.frameCount;
3775                if (mResampler == 0) {
3776                    // no resampling
3777                    while (framesOut) {
3778                        size_t framesIn = mFrameCount - mRsmpInIndex;
3779                        if (framesIn) {
3780                            int8_t *src = (int8_t *)mRsmpInBuffer + mRsmpInIndex * mFrameSize;
3781                            int8_t *dst = buffer.i8 + (buffer.frameCount - framesOut) * mActiveTrack->mCblk->frameSize;
3782                            if (framesIn > framesOut)
3783                                framesIn = framesOut;
3784                            mRsmpInIndex += framesIn;
3785                            framesOut -= framesIn;
3786                            if ((int)mChannelCount == mReqChannelCount ||
3787                                mFormat != AudioSystem::PCM_16_BIT) {
3788                                memcpy(dst, src, framesIn * mFrameSize);
3789                            } else {
3790                                int16_t *src16 = (int16_t *)src;
3791                                int16_t *dst16 = (int16_t *)dst;
3792                                if (mChannelCount == 1) {
3793                                    while (framesIn--) {
3794                                        *dst16++ = *src16;
3795                                        *dst16++ = *src16++;
3796                                    }
3797                                } else {
3798                                    while (framesIn--) {
3799                                        *dst16++ = (int16_t)(((int32_t)*src16 + (int32_t)*(src16 + 1)) >> 1);
3800                                        src16 += 2;
3801                                    }
3802                                }
3803                            }
3804                        }
3805                        if (framesOut && mFrameCount == mRsmpInIndex) {
3806                            if (framesOut == mFrameCount &&
3807                                ((int)mChannelCount == mReqChannelCount || mFormat != AudioSystem::PCM_16_BIT)) {
3808                                mBytesRead = mInput->read(buffer.raw, mInputBytes);
3809                                framesOut = 0;
3810                            } else {
3811                                mBytesRead = mInput->read(mRsmpInBuffer, mInputBytes);
3812                                mRsmpInIndex = 0;
3813                            }
3814                            if (mBytesRead < 0) {
3815                                LOGE("Error reading audio input");
3816                                if (mActiveTrack->mState == TrackBase::ACTIVE) {
3817                                    // Force input into standby so that it tries to
3818                                    // recover at next read attempt
3819                                    mInput->standby();
3820                                    usleep(5000);
3821                                }
3822                                mRsmpInIndex = mFrameCount;
3823                                framesOut = 0;
3824                                buffer.frameCount = 0;
3825                            }
3826                        }
3827                    }
3828                } else {
3829                    // resampling
3830
3831                    memset(mRsmpOutBuffer, 0, framesOut * 2 * sizeof(int32_t));
3832                    // alter output frame count as if we were expecting stereo samples
3833                    if (mChannelCount == 1 && mReqChannelCount == 1) {
3834                        framesOut >>= 1;
3835                    }
3836                    mResampler->resample(mRsmpOutBuffer, framesOut, this);
3837                    // ditherAndClamp() works as long as all buffers returned by mActiveTrack->getNextBuffer()
3838                    // are 32 bit aligned which should be always true.
3839                    if (mChannelCount == 2 && mReqChannelCount == 1) {
3840                        AudioMixer::ditherAndClamp(mRsmpOutBuffer, mRsmpOutBuffer, framesOut);
3841                        // the resampler always outputs stereo samples: do post stereo to mono conversion
3842                        int16_t *src = (int16_t *)mRsmpOutBuffer;
3843                        int16_t *dst = buffer.i16;
3844                        while (framesOut--) {
3845                            *dst++ = (int16_t)(((int32_t)*src + (int32_t)*(src + 1)) >> 1);
3846                            src += 2;
3847                        }
3848                    } else {
3849                        AudioMixer::ditherAndClamp((int32_t *)buffer.raw, mRsmpOutBuffer, framesOut);
3850                    }
3851
3852                }
3853                mActiveTrack->releaseBuffer(&buffer);
3854                mActiveTrack->overflow();
3855            }
3856            // client isn't retrieving buffers fast enough
3857            else {
3858                if (!mActiveTrack->setOverflow()) {
3859                    nsecs_t now = systemTime();
3860                    if ((now - lastWarning) > kWarningThrottle) {
3861                        LOGW("RecordThread: buffer overflow");
3862                        lastWarning = now;
3863                    }
3864                }
3865                // Release the processor for a while before asking for a new buffer.
3866                // This will give the application more chance to read from the buffer and
3867                // clear the overflow.
3868                usleep(5000);
3869            }
3870        }
3871    }
3872
3873    if (!mStandby) {
3874        mInput->standby();
3875    }
3876    mActiveTrack.clear();
3877
3878    mStartStopCond.broadcast();
3879
3880    LOGV("RecordThread %p exiting", this);
3881    return false;
3882}
3883
3884status_t AudioFlinger::RecordThread::start(RecordThread::RecordTrack* recordTrack)
3885{
3886    LOGV("RecordThread::start");
3887    sp <ThreadBase> strongMe = this;
3888    status_t status = NO_ERROR;
3889    {
3890        AutoMutex lock(&mLock);
3891        if (mActiveTrack != 0) {
3892            if (recordTrack != mActiveTrack.get()) {
3893                status = -EBUSY;
3894            } else if (mActiveTrack->mState == TrackBase::PAUSING) {
3895                mActiveTrack->mState = TrackBase::ACTIVE;
3896            }
3897            return status;
3898        }
3899
3900        recordTrack->mState = TrackBase::IDLE;
3901        mActiveTrack = recordTrack;
3902        mLock.unlock();
3903        status_t status = AudioSystem::startInput(mId);
3904        mLock.lock();
3905        if (status != NO_ERROR) {
3906            mActiveTrack.clear();
3907            return status;
3908        }
3909        mRsmpInIndex = mFrameCount;
3910        mBytesRead = 0;
3911        if (mResampler != NULL) {
3912            mResampler->reset();
3913        }
3914        mActiveTrack->mState = TrackBase::RESUMING;
3915        // signal thread to start
3916        LOGV("Signal record thread");
3917        mWaitWorkCV.signal();
3918        // do not wait for mStartStopCond if exiting
3919        if (mExiting) {
3920            mActiveTrack.clear();
3921            status = INVALID_OPERATION;
3922            goto startError;
3923        }
3924        mStartStopCond.wait(mLock);
3925        if (mActiveTrack == 0) {
3926            LOGV("Record failed to start");
3927            status = BAD_VALUE;
3928            goto startError;
3929        }
3930        LOGV("Record started OK");
3931        return status;
3932    }
3933startError:
3934    AudioSystem::stopInput(mId);
3935    return status;
3936}
3937
3938void AudioFlinger::RecordThread::stop(RecordThread::RecordTrack* recordTrack) {
3939    LOGV("RecordThread::stop");
3940    sp <ThreadBase> strongMe = this;
3941    {
3942        AutoMutex lock(&mLock);
3943        if (mActiveTrack != 0 && recordTrack == mActiveTrack.get()) {
3944            mActiveTrack->mState = TrackBase::PAUSING;
3945            // do not wait for mStartStopCond if exiting
3946            if (mExiting) {
3947                return;
3948            }
3949            mStartStopCond.wait(mLock);
3950            // if we have been restarted, recordTrack == mActiveTrack.get() here
3951            if (mActiveTrack == 0 || recordTrack != mActiveTrack.get()) {
3952                mLock.unlock();
3953                AudioSystem::stopInput(mId);
3954                mLock.lock();
3955                LOGV("Record stopped OK");
3956            }
3957        }
3958    }
3959}
3960
3961status_t AudioFlinger::RecordThread::dump(int fd, const Vector<String16>& args)
3962{
3963    const size_t SIZE = 256;
3964    char buffer[SIZE];
3965    String8 result;
3966    pid_t pid = 0;
3967
3968    snprintf(buffer, SIZE, "\nInput thread %p internals\n", this);
3969    result.append(buffer);
3970
3971    if (mActiveTrack != 0) {
3972        result.append("Active Track:\n");
3973        result.append("   Clien Fmt Chn Session Buf  S SRate  Serv     User\n");
3974        mActiveTrack->dump(buffer, SIZE);
3975        result.append(buffer);
3976
3977        snprintf(buffer, SIZE, "In index: %d\n", mRsmpInIndex);
3978        result.append(buffer);
3979        snprintf(buffer, SIZE, "In size: %d\n", mInputBytes);
3980        result.append(buffer);
3981        snprintf(buffer, SIZE, "Resampling: %d\n", (mResampler != 0));
3982        result.append(buffer);
3983        snprintf(buffer, SIZE, "Out channel count: %d\n", mReqChannelCount);
3984        result.append(buffer);
3985        snprintf(buffer, SIZE, "Out sample rate: %d\n", mReqSampleRate);
3986        result.append(buffer);
3987
3988
3989    } else {
3990        result.append("No record client\n");
3991    }
3992    write(fd, result.string(), result.size());
3993
3994    dumpBase(fd, args);
3995
3996    return NO_ERROR;
3997}
3998
3999status_t AudioFlinger::RecordThread::getNextBuffer(AudioBufferProvider::Buffer* buffer)
4000{
4001    size_t framesReq = buffer->frameCount;
4002    size_t framesReady = mFrameCount - mRsmpInIndex;
4003    int channelCount;
4004
4005    if (framesReady == 0) {
4006        mBytesRead = mInput->read(mRsmpInBuffer, mInputBytes);
4007        if (mBytesRead < 0) {
4008            LOGE("RecordThread::getNextBuffer() Error reading audio input");
4009            if (mActiveTrack->mState == TrackBase::ACTIVE) {
4010                // Force input into standby so that it tries to
4011                // recover at next read attempt
4012                mInput->standby();
4013                usleep(5000);
4014            }
4015            buffer->raw = 0;
4016            buffer->frameCount = 0;
4017            return NOT_ENOUGH_DATA;
4018        }
4019        mRsmpInIndex = 0;
4020        framesReady = mFrameCount;
4021    }
4022
4023    if (framesReq > framesReady) {
4024        framesReq = framesReady;
4025    }
4026
4027    if (mChannelCount == 1 && mReqChannelCount == 2) {
4028        channelCount = 1;
4029    } else {
4030        channelCount = 2;
4031    }
4032    buffer->raw = mRsmpInBuffer + mRsmpInIndex * channelCount;
4033    buffer->frameCount = framesReq;
4034    return NO_ERROR;
4035}
4036
4037void AudioFlinger::RecordThread::releaseBuffer(AudioBufferProvider::Buffer* buffer)
4038{
4039    mRsmpInIndex += buffer->frameCount;
4040    buffer->frameCount = 0;
4041}
4042
4043bool AudioFlinger::RecordThread::checkForNewParameters_l()
4044{
4045    bool reconfig = false;
4046
4047    while (!mNewParameters.isEmpty()) {
4048        status_t status = NO_ERROR;
4049        String8 keyValuePair = mNewParameters[0];
4050        AudioParameter param = AudioParameter(keyValuePair);
4051        int value;
4052        int reqFormat = mFormat;
4053        int reqSamplingRate = mReqSampleRate;
4054        int reqChannelCount = mReqChannelCount;
4055
4056        if (param.getInt(String8(AudioParameter::keySamplingRate), value) == NO_ERROR) {
4057            reqSamplingRate = value;
4058            reconfig = true;
4059        }
4060        if (param.getInt(String8(AudioParameter::keyFormat), value) == NO_ERROR) {
4061            reqFormat = value;
4062            reconfig = true;
4063        }
4064        if (param.getInt(String8(AudioParameter::keyChannels), value) == NO_ERROR) {
4065            reqChannelCount = AudioSystem::popCount(value);
4066            reconfig = true;
4067        }
4068        if (param.getInt(String8(AudioParameter::keyFrameCount), value) == NO_ERROR) {
4069            // do not accept frame count changes if tracks are open as the track buffer
4070            // size depends on frame count and correct behavior would not be garantied
4071            // if frame count is changed after track creation
4072            if (mActiveTrack != 0) {
4073                status = INVALID_OPERATION;
4074            } else {
4075                reconfig = true;
4076            }
4077        }
4078        if (status == NO_ERROR) {
4079            status = mInput->setParameters(keyValuePair);
4080            if (status == INVALID_OPERATION) {
4081               mInput->standby();
4082               status = mInput->setParameters(keyValuePair);
4083            }
4084            if (reconfig) {
4085                if (status == BAD_VALUE &&
4086                    reqFormat == mInput->format() && reqFormat == AudioSystem::PCM_16_BIT &&
4087                    ((int)mInput->sampleRate() <= 2 * reqSamplingRate) &&
4088                    (AudioSystem::popCount(mInput->channels()) < 3) && (reqChannelCount < 3)) {
4089                    status = NO_ERROR;
4090                }
4091                if (status == NO_ERROR) {
4092                    readInputParameters();
4093                    sendConfigEvent_l(AudioSystem::INPUT_CONFIG_CHANGED);
4094                }
4095            }
4096        }
4097
4098        mNewParameters.removeAt(0);
4099
4100        mParamStatus = status;
4101        mParamCond.signal();
4102        mWaitWorkCV.wait(mLock);
4103    }
4104    return reconfig;
4105}
4106
4107String8 AudioFlinger::RecordThread::getParameters(const String8& keys)
4108{
4109    return mInput->getParameters(keys);
4110}
4111
4112void AudioFlinger::RecordThread::audioConfigChanged_l(int event, int param) {
4113    AudioSystem::OutputDescriptor desc;
4114    void *param2 = 0;
4115
4116    switch (event) {
4117    case AudioSystem::INPUT_OPENED:
4118    case AudioSystem::INPUT_CONFIG_CHANGED:
4119        desc.channels = mChannels;
4120        desc.samplingRate = mSampleRate;
4121        desc.format = mFormat;
4122        desc.frameCount = mFrameCount;
4123        desc.latency = 0;
4124        param2 = &desc;
4125        break;
4126
4127    case AudioSystem::INPUT_CLOSED:
4128    default:
4129        break;
4130    }
4131    mAudioFlinger->audioConfigChanged_l(event, mId, param2);
4132}
4133
4134void AudioFlinger::RecordThread::readInputParameters()
4135{
4136    if (mRsmpInBuffer) delete mRsmpInBuffer;
4137    if (mRsmpOutBuffer) delete mRsmpOutBuffer;
4138    if (mResampler) delete mResampler;
4139    mResampler = 0;
4140
4141    mSampleRate = mInput->sampleRate();
4142    mChannels = mInput->channels();
4143    mChannelCount = (uint16_t)AudioSystem::popCount(mChannels);
4144    mFormat = mInput->format();
4145    mFrameSize = (uint16_t)mInput->frameSize();
4146    mInputBytes = mInput->bufferSize();
4147    mFrameCount = mInputBytes / mFrameSize;
4148    mRsmpInBuffer = new int16_t[mFrameCount * mChannelCount];
4149
4150    if (mSampleRate != mReqSampleRate && mChannelCount < 3 && mReqChannelCount < 3)
4151    {
4152        int channelCount;
4153         // optmization: if mono to mono, use the resampler in stereo to stereo mode to avoid
4154         // stereo to mono post process as the resampler always outputs stereo.
4155        if (mChannelCount == 1 && mReqChannelCount == 2) {
4156            channelCount = 1;
4157        } else {
4158            channelCount = 2;
4159        }
4160        mResampler = AudioResampler::create(16, channelCount, mReqSampleRate);
4161        mResampler->setSampleRate(mSampleRate);
4162        mResampler->setVolume(AudioMixer::UNITY_GAIN, AudioMixer::UNITY_GAIN);
4163        mRsmpOutBuffer = new int32_t[mFrameCount * 2];
4164
4165        // optmization: if mono to mono, alter input frame count as if we were inputing stereo samples
4166        if (mChannelCount == 1 && mReqChannelCount == 1) {
4167            mFrameCount >>= 1;
4168        }
4169
4170    }
4171    mRsmpInIndex = mFrameCount;
4172}
4173
4174unsigned int AudioFlinger::RecordThread::getInputFramesLost()
4175{
4176    return mInput->getInputFramesLost();
4177}
4178
4179// ----------------------------------------------------------------------------
4180
4181int AudioFlinger::openOutput(uint32_t *pDevices,
4182                                uint32_t *pSamplingRate,
4183                                uint32_t *pFormat,
4184                                uint32_t *pChannels,
4185                                uint32_t *pLatencyMs,
4186                                uint32_t flags)
4187{
4188    status_t status;
4189    PlaybackThread *thread = NULL;
4190    mHardwareStatus = AUDIO_HW_OUTPUT_OPEN;
4191    uint32_t samplingRate = pSamplingRate ? *pSamplingRate : 0;
4192    uint32_t format = pFormat ? *pFormat : 0;
4193    uint32_t channels = pChannels ? *pChannels : 0;
4194    uint32_t latency = pLatencyMs ? *pLatencyMs : 0;
4195
4196    LOGV("openOutput(), Device %x, SamplingRate %d, Format %d, Channels %x, flags %x",
4197            pDevices ? *pDevices : 0,
4198            samplingRate,
4199            format,
4200            channels,
4201            flags);
4202
4203    if (pDevices == NULL || *pDevices == 0) {
4204        return 0;
4205    }
4206    Mutex::Autolock _l(mLock);
4207
4208    AudioStreamOut *output = mAudioHardware->openOutputStream(*pDevices,
4209                                                             (int *)&format,
4210                                                             &channels,
4211                                                             &samplingRate,
4212                                                             &status);
4213    LOGV("openOutput() openOutputStream returned output %p, SamplingRate %d, Format %d, Channels %x, status %d",
4214            output,
4215            samplingRate,
4216            format,
4217            channels,
4218            status);
4219
4220    mHardwareStatus = AUDIO_HW_IDLE;
4221    if (output != 0) {
4222        int id = nextUniqueId_l();
4223        if ((flags & AudioSystem::OUTPUT_FLAG_DIRECT) ||
4224            (format != AudioSystem::PCM_16_BIT) ||
4225            (channels != AudioSystem::CHANNEL_OUT_STEREO)) {
4226            thread = new DirectOutputThread(this, output, id, *pDevices);
4227            LOGV("openOutput() created direct output: ID %d thread %p", id, thread);
4228        } else {
4229            thread = new MixerThread(this, output, id, *pDevices);
4230            LOGV("openOutput() created mixer output: ID %d thread %p", id, thread);
4231        }
4232        mPlaybackThreads.add(id, thread);
4233
4234        if (pSamplingRate) *pSamplingRate = samplingRate;
4235        if (pFormat) *pFormat = format;
4236        if (pChannels) *pChannels = channels;
4237        if (pLatencyMs) *pLatencyMs = thread->latency();
4238
4239        // notify client processes of the new output creation
4240        thread->audioConfigChanged_l(AudioSystem::OUTPUT_OPENED);
4241        return id;
4242    }
4243
4244    return 0;
4245}
4246
4247int AudioFlinger::openDuplicateOutput(int output1, int output2)
4248{
4249    Mutex::Autolock _l(mLock);
4250    MixerThread *thread1 = checkMixerThread_l(output1);
4251    MixerThread *thread2 = checkMixerThread_l(output2);
4252
4253    if (thread1 == NULL || thread2 == NULL) {
4254        LOGW("openDuplicateOutput() wrong output mixer type for output %d or %d", output1, output2);
4255        return 0;
4256    }
4257
4258    int id = nextUniqueId_l();
4259    DuplicatingThread *thread = new DuplicatingThread(this, thread1, id);
4260    thread->addOutputTrack(thread2);
4261    mPlaybackThreads.add(id, thread);
4262    // notify client processes of the new output creation
4263    thread->audioConfigChanged_l(AudioSystem::OUTPUT_OPENED);
4264    return id;
4265}
4266
4267status_t AudioFlinger::closeOutput(int output)
4268{
4269    // keep strong reference on the playback thread so that
4270    // it is not destroyed while exit() is executed
4271    sp <PlaybackThread> thread;
4272    {
4273        Mutex::Autolock _l(mLock);
4274        thread = checkPlaybackThread_l(output);
4275        if (thread == NULL) {
4276            return BAD_VALUE;
4277        }
4278
4279        LOGV("closeOutput() %d", output);
4280
4281        if (thread->type() == PlaybackThread::MIXER) {
4282            for (size_t i = 0; i < mPlaybackThreads.size(); i++) {
4283                if (mPlaybackThreads.valueAt(i)->type() == PlaybackThread::DUPLICATING) {
4284                    DuplicatingThread *dupThread = (DuplicatingThread *)mPlaybackThreads.valueAt(i).get();
4285                    dupThread->removeOutputTrack((MixerThread *)thread.get());
4286                }
4287            }
4288        }
4289        void *param2 = 0;
4290        audioConfigChanged_l(AudioSystem::OUTPUT_CLOSED, output, param2);
4291        mPlaybackThreads.removeItem(output);
4292    }
4293    thread->exit();
4294
4295    if (thread->type() != PlaybackThread::DUPLICATING) {
4296        mAudioHardware->closeOutputStream(thread->getOutput());
4297    }
4298    return NO_ERROR;
4299}
4300
4301status_t AudioFlinger::suspendOutput(int output)
4302{
4303    Mutex::Autolock _l(mLock);
4304    PlaybackThread *thread = checkPlaybackThread_l(output);
4305
4306    if (thread == NULL) {
4307        return BAD_VALUE;
4308    }
4309
4310    LOGV("suspendOutput() %d", output);
4311    thread->suspend();
4312
4313    return NO_ERROR;
4314}
4315
4316status_t AudioFlinger::restoreOutput(int output)
4317{
4318    Mutex::Autolock _l(mLock);
4319    PlaybackThread *thread = checkPlaybackThread_l(output);
4320
4321    if (thread == NULL) {
4322        return BAD_VALUE;
4323    }
4324
4325    LOGV("restoreOutput() %d", output);
4326
4327    thread->restore();
4328
4329    return NO_ERROR;
4330}
4331
4332int AudioFlinger::openInput(uint32_t *pDevices,
4333                                uint32_t *pSamplingRate,
4334                                uint32_t *pFormat,
4335                                uint32_t *pChannels,
4336                                uint32_t acoustics)
4337{
4338    status_t status;
4339    RecordThread *thread = NULL;
4340    uint32_t samplingRate = pSamplingRate ? *pSamplingRate : 0;
4341    uint32_t format = pFormat ? *pFormat : 0;
4342    uint32_t channels = pChannels ? *pChannels : 0;
4343    uint32_t reqSamplingRate = samplingRate;
4344    uint32_t reqFormat = format;
4345    uint32_t reqChannels = channels;
4346
4347    if (pDevices == NULL || *pDevices == 0) {
4348        return 0;
4349    }
4350    Mutex::Autolock _l(mLock);
4351
4352    AudioStreamIn *input = mAudioHardware->openInputStream(*pDevices,
4353                                                             (int *)&format,
4354                                                             &channels,
4355                                                             &samplingRate,
4356                                                             &status,
4357                                                             (AudioSystem::audio_in_acoustics)acoustics);
4358    LOGV("openInput() openInputStream returned input %p, SamplingRate %d, Format %d, Channels %x, acoustics %x, status %d",
4359            input,
4360            samplingRate,
4361            format,
4362            channels,
4363            acoustics,
4364            status);
4365
4366    // If the input could not be opened with the requested parameters and we can handle the conversion internally,
4367    // try to open again with the proposed parameters. The AudioFlinger can resample the input and do mono to stereo
4368    // or stereo to mono conversions on 16 bit PCM inputs.
4369    if (input == 0 && status == BAD_VALUE &&
4370        reqFormat == format && format == AudioSystem::PCM_16_BIT &&
4371        (samplingRate <= 2 * reqSamplingRate) &&
4372        (AudioSystem::popCount(channels) < 3) && (AudioSystem::popCount(reqChannels) < 3)) {
4373        LOGV("openInput() reopening with proposed sampling rate and channels");
4374        input = mAudioHardware->openInputStream(*pDevices,
4375                                                 (int *)&format,
4376                                                 &channels,
4377                                                 &samplingRate,
4378                                                 &status,
4379                                                 (AudioSystem::audio_in_acoustics)acoustics);
4380    }
4381
4382    if (input != 0) {
4383        int id = nextUniqueId_l();
4384         // Start record thread
4385        thread = new RecordThread(this, input, reqSamplingRate, reqChannels, id);
4386        mRecordThreads.add(id, thread);
4387        LOGV("openInput() created record thread: ID %d thread %p", id, thread);
4388        if (pSamplingRate) *pSamplingRate = reqSamplingRate;
4389        if (pFormat) *pFormat = format;
4390        if (pChannels) *pChannels = reqChannels;
4391
4392        input->standby();
4393
4394        // notify client processes of the new input creation
4395        thread->audioConfigChanged_l(AudioSystem::INPUT_OPENED);
4396        return id;
4397    }
4398
4399    return 0;
4400}
4401
4402status_t AudioFlinger::closeInput(int input)
4403{
4404    // keep strong reference on the record thread so that
4405    // it is not destroyed while exit() is executed
4406    sp <RecordThread> thread;
4407    {
4408        Mutex::Autolock _l(mLock);
4409        thread = checkRecordThread_l(input);
4410        if (thread == NULL) {
4411            return BAD_VALUE;
4412        }
4413
4414        LOGV("closeInput() %d", input);
4415        void *param2 = 0;
4416        audioConfigChanged_l(AudioSystem::INPUT_CLOSED, input, param2);
4417        mRecordThreads.removeItem(input);
4418    }
4419    thread->exit();
4420
4421    mAudioHardware->closeInputStream(thread->getInput());
4422
4423    return NO_ERROR;
4424}
4425
4426status_t AudioFlinger::setStreamOutput(uint32_t stream, int output)
4427{
4428    Mutex::Autolock _l(mLock);
4429    MixerThread *dstThread = checkMixerThread_l(output);
4430    if (dstThread == NULL) {
4431        LOGW("setStreamOutput() bad output id %d", output);
4432        return BAD_VALUE;
4433    }
4434
4435    LOGV("setStreamOutput() stream %d to output %d", stream, output);
4436    audioConfigChanged_l(AudioSystem::STREAM_CONFIG_CHANGED, output, &stream);
4437
4438    for (size_t i = 0; i < mPlaybackThreads.size(); i++) {
4439        PlaybackThread *thread = mPlaybackThreads.valueAt(i).get();
4440        if (thread != dstThread &&
4441            thread->type() != PlaybackThread::DIRECT) {
4442            MixerThread *srcThread = (MixerThread *)thread;
4443            srcThread->invalidateTracks(stream);
4444        }
4445    }
4446
4447    return NO_ERROR;
4448}
4449
4450
4451int AudioFlinger::newAudioSessionId()
4452{
4453    AutoMutex _l(mLock);
4454    return nextUniqueId_l();
4455}
4456
4457// checkPlaybackThread_l() must be called with AudioFlinger::mLock held
4458AudioFlinger::PlaybackThread *AudioFlinger::checkPlaybackThread_l(int output) const
4459{
4460    PlaybackThread *thread = NULL;
4461    if (mPlaybackThreads.indexOfKey(output) >= 0) {
4462        thread = (PlaybackThread *)mPlaybackThreads.valueFor(output).get();
4463    }
4464    return thread;
4465}
4466
4467// checkMixerThread_l() must be called with AudioFlinger::mLock held
4468AudioFlinger::MixerThread *AudioFlinger::checkMixerThread_l(int output) const
4469{
4470    PlaybackThread *thread = checkPlaybackThread_l(output);
4471    if (thread != NULL) {
4472        if (thread->type() == PlaybackThread::DIRECT) {
4473            thread = NULL;
4474        }
4475    }
4476    return (MixerThread *)thread;
4477}
4478
4479// checkRecordThread_l() must be called with AudioFlinger::mLock held
4480AudioFlinger::RecordThread *AudioFlinger::checkRecordThread_l(int input) const
4481{
4482    RecordThread *thread = NULL;
4483    if (mRecordThreads.indexOfKey(input) >= 0) {
4484        thread = (RecordThread *)mRecordThreads.valueFor(input).get();
4485    }
4486    return thread;
4487}
4488
4489// nextUniqueId_l() must be called with AudioFlinger::mLock held
4490int AudioFlinger::nextUniqueId_l()
4491{
4492    return mNextUniqueId++;
4493}
4494
4495// ----------------------------------------------------------------------------
4496//  Effect management
4497// ----------------------------------------------------------------------------
4498
4499
4500status_t AudioFlinger::loadEffectLibrary(const char *libPath, int *handle)
4501{
4502    // check calling permissions
4503    if (!settingsAllowed()) {
4504        return PERMISSION_DENIED;
4505    }
4506    // only allow libraries loaded from /system/lib/soundfx for now
4507    if (strncmp(gEffectLibPath, libPath, strlen(gEffectLibPath)) != 0) {
4508        return PERMISSION_DENIED;
4509    }
4510
4511    Mutex::Autolock _l(mLock);
4512    return EffectLoadLibrary(libPath, handle);
4513}
4514
4515status_t AudioFlinger::unloadEffectLibrary(int handle)
4516{
4517    // check calling permissions
4518    if (!settingsAllowed()) {
4519        return PERMISSION_DENIED;
4520    }
4521
4522    Mutex::Autolock _l(mLock);
4523    return EffectUnloadLibrary(handle);
4524}
4525
4526status_t AudioFlinger::queryNumberEffects(uint32_t *numEffects)
4527{
4528    Mutex::Autolock _l(mLock);
4529    return EffectQueryNumberEffects(numEffects);
4530}
4531
4532status_t AudioFlinger::queryEffect(uint32_t index, effect_descriptor_t *descriptor)
4533{
4534    Mutex::Autolock _l(mLock);
4535    return EffectQueryEffect(index, descriptor);
4536}
4537
4538status_t AudioFlinger::getEffectDescriptor(effect_uuid_t *pUuid, effect_descriptor_t *descriptor)
4539{
4540    Mutex::Autolock _l(mLock);
4541    return EffectGetDescriptor(pUuid, descriptor);
4542}
4543
4544
4545// this UUID must match the one defined in media/libeffects/EffectVisualizer.cpp
4546static const effect_uuid_t VISUALIZATION_UUID_ =
4547    {0xd069d9e0, 0x8329, 0x11df, 0x9168, {0x00, 0x02, 0xa5, 0xd5, 0xc5, 0x1b}};
4548
4549sp<IEffect> AudioFlinger::createEffect(pid_t pid,
4550        effect_descriptor_t *pDesc,
4551        const sp<IEffectClient>& effectClient,
4552        int32_t priority,
4553        int output,
4554        int sessionId,
4555        status_t *status,
4556        int *id,
4557        int *enabled)
4558{
4559    status_t lStatus = NO_ERROR;
4560    sp<EffectHandle> handle;
4561    effect_interface_t itfe;
4562    effect_descriptor_t desc;
4563    sp<Client> client;
4564    wp<Client> wclient;
4565
4566    LOGV("createEffect pid %d, client %p, priority %d, sessionId %d, output %d",
4567            pid, effectClient.get(), priority, sessionId, output);
4568
4569    if (pDesc == NULL) {
4570        lStatus = BAD_VALUE;
4571        goto Exit;
4572    }
4573
4574    // check audio settings permission for global effects
4575    if (sessionId == AudioSystem::SESSION_OUTPUT_MIX && !settingsAllowed()) {
4576        lStatus = PERMISSION_DENIED;
4577        goto Exit;
4578    }
4579
4580    // Session AudioSystem::SESSION_OUTPUT_STAGE is reserved for output stage effects
4581    // that can only be created by audio policy manager (running in same process)
4582    if (sessionId == AudioSystem::SESSION_OUTPUT_STAGE && getpid() != pid) {
4583        lStatus = PERMISSION_DENIED;
4584        goto Exit;
4585    }
4586
4587    // check recording permission for visualizer
4588    if ((memcmp(&pDesc->type, SL_IID_VISUALIZATION, sizeof(effect_uuid_t)) == 0 ||
4589         memcmp(&pDesc->uuid, &VISUALIZATION_UUID_, sizeof(effect_uuid_t)) == 0) &&
4590        !recordingAllowed()) {
4591        lStatus = PERMISSION_DENIED;
4592        goto Exit;
4593    }
4594
4595    if (output == 0) {
4596        if (sessionId == AudioSystem::SESSION_OUTPUT_STAGE) {
4597            // output must be specified by AudioPolicyManager when using session
4598            // AudioSystem::SESSION_OUTPUT_STAGE
4599            lStatus = BAD_VALUE;
4600            goto Exit;
4601        } else if (sessionId == AudioSystem::SESSION_OUTPUT_MIX) {
4602            // if the output returned by getOutputForEffect() is removed before we lock the
4603            // mutex below, the call to checkPlaybackThread_l(output) below will detect it
4604            // and we will exit safely
4605            output = AudioSystem::getOutputForEffect(&desc);
4606        }
4607    }
4608
4609    {
4610        Mutex::Autolock _l(mLock);
4611
4612
4613        if (!EffectIsNullUuid(&pDesc->uuid)) {
4614            // if uuid is specified, request effect descriptor
4615            lStatus = EffectGetDescriptor(&pDesc->uuid, &desc);
4616            if (lStatus < 0) {
4617                LOGW("createEffect() error %d from EffectGetDescriptor", lStatus);
4618                goto Exit;
4619            }
4620        } else {
4621            // if uuid is not specified, look for an available implementation
4622            // of the required type in effect factory
4623            if (EffectIsNullUuid(&pDesc->type)) {
4624                LOGW("createEffect() no effect type");
4625                lStatus = BAD_VALUE;
4626                goto Exit;
4627            }
4628            uint32_t numEffects = 0;
4629            effect_descriptor_t d;
4630            bool found = false;
4631
4632            lStatus = EffectQueryNumberEffects(&numEffects);
4633            if (lStatus < 0) {
4634                LOGW("createEffect() error %d from EffectQueryNumberEffects", lStatus);
4635                goto Exit;
4636            }
4637            for (uint32_t i = 0; i < numEffects; i++) {
4638                lStatus = EffectQueryEffect(i, &desc);
4639                if (lStatus < 0) {
4640                    LOGW("createEffect() error %d from EffectQueryEffect", lStatus);
4641                    continue;
4642                }
4643                if (memcmp(&desc.type, &pDesc->type, sizeof(effect_uuid_t)) == 0) {
4644                    // If matching type found save effect descriptor. If the session is
4645                    // 0 and the effect is not auxiliary, continue enumeration in case
4646                    // an auxiliary version of this effect type is available
4647                    found = true;
4648                    memcpy(&d, &desc, sizeof(effect_descriptor_t));
4649                    if (sessionId != AudioSystem::SESSION_OUTPUT_MIX ||
4650                            (desc.flags & EFFECT_FLAG_TYPE_MASK) == EFFECT_FLAG_TYPE_AUXILIARY) {
4651                        break;
4652                    }
4653                }
4654            }
4655            if (!found) {
4656                lStatus = BAD_VALUE;
4657                LOGW("createEffect() effect not found");
4658                goto Exit;
4659            }
4660            // For same effect type, chose auxiliary version over insert version if
4661            // connect to output mix (Compliance to OpenSL ES)
4662            if (sessionId == AudioSystem::SESSION_OUTPUT_MIX &&
4663                    (d.flags & EFFECT_FLAG_TYPE_MASK) != EFFECT_FLAG_TYPE_AUXILIARY) {
4664                memcpy(&desc, &d, sizeof(effect_descriptor_t));
4665            }
4666        }
4667
4668        // Do not allow auxiliary effects on a session different from 0 (output mix)
4669        if (sessionId != AudioSystem::SESSION_OUTPUT_MIX &&
4670             (desc.flags & EFFECT_FLAG_TYPE_MASK) == EFFECT_FLAG_TYPE_AUXILIARY) {
4671            lStatus = INVALID_OPERATION;
4672            goto Exit;
4673        }
4674
4675        // return effect descriptor
4676        memcpy(pDesc, &desc, sizeof(effect_descriptor_t));
4677
4678        // If output is not specified try to find a matching audio session ID in one of the
4679        // output threads.
4680        // If output is 0 here, sessionId is neither SESSION_OUTPUT_STAGE nor SESSION_OUTPUT_MIX
4681        // because of code checking output when entering the function.
4682        if (output == 0) {
4683             // look for the thread where the specified audio session is present
4684            for (size_t i = 0; i < mPlaybackThreads.size(); i++) {
4685                if (mPlaybackThreads.valueAt(i)->hasAudioSession(sessionId) != 0) {
4686                    output = mPlaybackThreads.keyAt(i);
4687                    break;
4688                }
4689            }
4690            // If no output thread contains the requested session ID, default to
4691            // first output. The effect chain will be moved to the correct output
4692            // thread when a track with the same session ID is created
4693            if (output == 0 && mPlaybackThreads.size()) {
4694                output = mPlaybackThreads.keyAt(0);
4695            }
4696        }
4697        LOGV("createEffect() got output %d for effect %s", output, desc.name);
4698        PlaybackThread *thread = checkPlaybackThread_l(output);
4699        if (thread == NULL) {
4700            LOGE("createEffect() unknown output thread");
4701            lStatus = BAD_VALUE;
4702            goto Exit;
4703        }
4704
4705        // TODO: allow attachment of effect to inputs
4706
4707        wclient = mClients.valueFor(pid);
4708
4709        if (wclient != NULL) {
4710            client = wclient.promote();
4711        } else {
4712            client = new Client(this, pid);
4713            mClients.add(pid, client);
4714        }
4715
4716        // create effect on selected output trhead
4717        handle = thread->createEffect_l(client, effectClient, priority, sessionId,
4718                &desc, enabled, &lStatus);
4719        if (handle != 0 && id != NULL) {
4720            *id = handle->id();
4721        }
4722    }
4723
4724Exit:
4725    if(status) {
4726        *status = lStatus;
4727    }
4728    return handle;
4729}
4730
4731status_t AudioFlinger::moveEffects(int session, int srcOutput, int dstOutput)
4732{
4733    LOGV("moveEffects() session %d, srcOutput %d, dstOutput %d",
4734            session, srcOutput, dstOutput);
4735    Mutex::Autolock _l(mLock);
4736    if (srcOutput == dstOutput) {
4737        LOGW("moveEffects() same dst and src outputs %d", dstOutput);
4738        return NO_ERROR;
4739    }
4740    PlaybackThread *srcThread = checkPlaybackThread_l(srcOutput);
4741    if (srcThread == NULL) {
4742        LOGW("moveEffects() bad srcOutput %d", srcOutput);
4743        return BAD_VALUE;
4744    }
4745    PlaybackThread *dstThread = checkPlaybackThread_l(dstOutput);
4746    if (dstThread == NULL) {
4747        LOGW("moveEffects() bad dstOutput %d", dstOutput);
4748        return BAD_VALUE;
4749    }
4750
4751    Mutex::Autolock _dl(dstThread->mLock);
4752    Mutex::Autolock _sl(srcThread->mLock);
4753    moveEffectChain_l(session, srcThread, dstThread, false);
4754
4755    return NO_ERROR;
4756}
4757
4758// moveEffectChain_l mustbe called with both srcThread and dstThread mLocks held
4759status_t AudioFlinger::moveEffectChain_l(int session,
4760                                   AudioFlinger::PlaybackThread *srcThread,
4761                                   AudioFlinger::PlaybackThread *dstThread,
4762                                   bool reRegister)
4763{
4764    LOGV("moveEffectChain_l() session %d from thread %p to thread %p",
4765            session, srcThread, dstThread);
4766
4767    sp<EffectChain> chain = srcThread->getEffectChain_l(session);
4768    if (chain == 0) {
4769        LOGW("moveEffectChain_l() effect chain for session %d not on source thread %p",
4770                session, srcThread);
4771        return INVALID_OPERATION;
4772    }
4773
4774    // remove chain first. This is useful only if reconfiguring effect chain on same output thread,
4775    // so that a new chain is created with correct parameters when first effect is added. This is
4776    // otherwise unecessary as removeEffect_l() will remove the chain when last effect is
4777    // removed.
4778    srcThread->removeEffectChain_l(chain);
4779
4780    // transfer all effects one by one so that new effect chain is created on new thread with
4781    // correct buffer sizes and audio parameters and effect engines reconfigured accordingly
4782    int dstOutput = dstThread->id();
4783    sp<EffectChain> dstChain;
4784    uint32_t strategy;
4785    sp<EffectModule> effect = chain->getEffectFromId_l(0);
4786    while (effect != 0) {
4787        srcThread->removeEffect_l(effect);
4788        dstThread->addEffect_l(effect);
4789        // if the move request is not received from audio policy manager, the effect must be
4790        // re-registered with the new strategy and output
4791        if (dstChain == 0) {
4792            dstChain = effect->chain().promote();
4793            if (dstChain == 0) {
4794                LOGW("moveEffectChain_l() cannot get chain from effect %p", effect.get());
4795                srcThread->addEffect_l(effect);
4796                return NO_INIT;
4797            }
4798            strategy = dstChain->strategy();
4799        }
4800        if (reRegister) {
4801            AudioSystem::unregisterEffect(effect->id());
4802            AudioSystem::registerEffect(&effect->desc(),
4803                                        dstOutput,
4804                                        strategy,
4805                                        session,
4806                                        effect->id());
4807        }
4808        effect = chain->getEffectFromId_l(0);
4809    }
4810
4811    return NO_ERROR;
4812}
4813
4814// PlaybackThread::createEffect_l() must be called with AudioFlinger::mLock held
4815sp<AudioFlinger::EffectHandle> AudioFlinger::PlaybackThread::createEffect_l(
4816        const sp<AudioFlinger::Client>& client,
4817        const sp<IEffectClient>& effectClient,
4818        int32_t priority,
4819        int sessionId,
4820        effect_descriptor_t *desc,
4821        int *enabled,
4822        status_t *status
4823        )
4824{
4825    sp<EffectModule> effect;
4826    sp<EffectHandle> handle;
4827    status_t lStatus;
4828    sp<Track> track;
4829    sp<EffectChain> chain;
4830    bool chainCreated = false;
4831    bool effectCreated = false;
4832    bool effectRegistered = false;
4833
4834    if (mOutput == 0) {
4835        LOGW("createEffect_l() Audio driver not initialized.");
4836        lStatus = NO_INIT;
4837        goto Exit;
4838    }
4839
4840    // Do not allow auxiliary effect on session other than 0
4841    if ((desc->flags & EFFECT_FLAG_TYPE_MASK) == EFFECT_FLAG_TYPE_AUXILIARY &&
4842        sessionId != AudioSystem::SESSION_OUTPUT_MIX) {
4843        LOGW("createEffect_l() Cannot add auxiliary effect %s to session %d",
4844                desc->name, sessionId);
4845        lStatus = BAD_VALUE;
4846        goto Exit;
4847    }
4848
4849    // Do not allow effects with session ID 0 on direct output or duplicating threads
4850    // TODO: add rule for hw accelerated effects on direct outputs with non PCM format
4851    if (sessionId == AudioSystem::SESSION_OUTPUT_MIX && mType != MIXER) {
4852        LOGW("createEffect_l() Cannot add auxiliary effect %s to session %d",
4853                desc->name, sessionId);
4854        lStatus = BAD_VALUE;
4855        goto Exit;
4856    }
4857
4858    LOGV("createEffect_l() thread %p effect %s on session %d", this, desc->name, sessionId);
4859
4860    { // scope for mLock
4861        Mutex::Autolock _l(mLock);
4862
4863        // check for existing effect chain with the requested audio session
4864        chain = getEffectChain_l(sessionId);
4865        if (chain == 0) {
4866            // create a new chain for this session
4867            LOGV("createEffect_l() new effect chain for session %d", sessionId);
4868            chain = new EffectChain(this, sessionId);
4869            addEffectChain_l(chain);
4870            chain->setStrategy(getStrategyForSession_l(sessionId));
4871            chainCreated = true;
4872        } else {
4873            effect = chain->getEffectFromDesc_l(desc);
4874        }
4875
4876        LOGV("createEffect_l() got effect %p on chain %p", effect == 0 ? 0 : effect.get(), chain.get());
4877
4878        if (effect == 0) {
4879            int id = mAudioFlinger->nextUniqueId_l();
4880            // Check CPU and memory usage
4881            lStatus = AudioSystem::registerEffect(desc, mId, chain->strategy(), sessionId, id);
4882            if (lStatus != NO_ERROR) {
4883                goto Exit;
4884            }
4885            effectRegistered = true;
4886            // create a new effect module if none present in the chain
4887            effect = new EffectModule(this, chain, desc, id, sessionId);
4888            lStatus = effect->status();
4889            if (lStatus != NO_ERROR) {
4890                goto Exit;
4891            }
4892            lStatus = chain->addEffect_l(effect);
4893            if (lStatus != NO_ERROR) {
4894                goto Exit;
4895            }
4896            effectCreated = true;
4897
4898            effect->setDevice(mDevice);
4899            effect->setMode(mAudioFlinger->getMode());
4900        }
4901        // create effect handle and connect it to effect module
4902        handle = new EffectHandle(effect, client, effectClient, priority);
4903        lStatus = effect->addHandle(handle);
4904        if (enabled) {
4905            *enabled = (int)effect->isEnabled();
4906        }
4907    }
4908
4909Exit:
4910    if (lStatus != NO_ERROR && lStatus != ALREADY_EXISTS) {
4911        Mutex::Autolock _l(mLock);
4912        if (effectCreated) {
4913            chain->removeEffect_l(effect);
4914        }
4915        if (effectRegistered) {
4916            AudioSystem::unregisterEffect(effect->id());
4917        }
4918        if (chainCreated) {
4919            removeEffectChain_l(chain);
4920        }
4921        handle.clear();
4922    }
4923
4924    if(status) {
4925        *status = lStatus;
4926    }
4927    return handle;
4928}
4929
4930// PlaybackThread::addEffect_l() must be called with AudioFlinger::mLock and
4931// PlaybackThread::mLock held
4932status_t AudioFlinger::PlaybackThread::addEffect_l(const sp<EffectModule>& effect)
4933{
4934    // check for existing effect chain with the requested audio session
4935    int sessionId = effect->sessionId();
4936    sp<EffectChain> chain = getEffectChain_l(sessionId);
4937    bool chainCreated = false;
4938
4939    if (chain == 0) {
4940        // create a new chain for this session
4941        LOGV("addEffect_l() new effect chain for session %d", sessionId);
4942        chain = new EffectChain(this, sessionId);
4943        addEffectChain_l(chain);
4944        chain->setStrategy(getStrategyForSession_l(sessionId));
4945        chainCreated = true;
4946    }
4947    LOGV("addEffect_l() %p chain %p effect %p", this, chain.get(), effect.get());
4948
4949    if (chain->getEffectFromId_l(effect->id()) != 0) {
4950        LOGW("addEffect_l() %p effect %s already present in chain %p",
4951                this, effect->desc().name, chain.get());
4952        return BAD_VALUE;
4953    }
4954
4955    status_t status = chain->addEffect_l(effect);
4956    if (status != NO_ERROR) {
4957        if (chainCreated) {
4958            removeEffectChain_l(chain);
4959        }
4960        return status;
4961    }
4962
4963    effect->setDevice(mDevice);
4964    effect->setMode(mAudioFlinger->getMode());
4965    return NO_ERROR;
4966}
4967
4968void AudioFlinger::PlaybackThread::removeEffect_l(const sp<EffectModule>& effect) {
4969
4970    LOGV("removeEffect_l() %p effect %p", this, effect.get());
4971    effect_descriptor_t desc = effect->desc();
4972    if ((desc.flags & EFFECT_FLAG_TYPE_MASK) == EFFECT_FLAG_TYPE_AUXILIARY) {
4973        detachAuxEffect_l(effect->id());
4974    }
4975
4976    sp<EffectChain> chain = effect->chain().promote();
4977    if (chain != 0) {
4978        // remove effect chain if removing last effect
4979        if (chain->removeEffect_l(effect) == 0) {
4980            removeEffectChain_l(chain);
4981        }
4982    } else {
4983        LOGW("removeEffect_l() %p cannot promote chain for effect %p", this, effect.get());
4984    }
4985}
4986
4987void AudioFlinger::PlaybackThread::disconnectEffect(const sp<EffectModule>& effect,
4988                                                    const wp<EffectHandle>& handle) {
4989    Mutex::Autolock _l(mLock);
4990    LOGV("disconnectEffect() %p effect %p", this, effect.get());
4991    // delete the effect module if removing last handle on it
4992    if (effect->removeHandle(handle) == 0) {
4993        removeEffect_l(effect);
4994        AudioSystem::unregisterEffect(effect->id());
4995    }
4996}
4997
4998status_t AudioFlinger::PlaybackThread::addEffectChain_l(const sp<EffectChain>& chain)
4999{
5000    int session = chain->sessionId();
5001    int16_t *buffer = mMixBuffer;
5002    bool ownsBuffer = false;
5003
5004    LOGV("addEffectChain_l() %p on thread %p for session %d", chain.get(), this, session);
5005    if (session > 0) {
5006        // Only one effect chain can be present in direct output thread and it uses
5007        // the mix buffer as input
5008        if (mType != DIRECT) {
5009            size_t numSamples = mFrameCount * mChannelCount;
5010            buffer = new int16_t[numSamples];
5011            memset(buffer, 0, numSamples * sizeof(int16_t));
5012            LOGV("addEffectChain_l() creating new input buffer %p session %d", buffer, session);
5013            ownsBuffer = true;
5014        }
5015
5016        // Attach all tracks with same session ID to this chain.
5017        for (size_t i = 0; i < mTracks.size(); ++i) {
5018            sp<Track> track = mTracks[i];
5019            if (session == track->sessionId()) {
5020                LOGV("addEffectChain_l() track->setMainBuffer track %p buffer %p", track.get(), buffer);
5021                track->setMainBuffer(buffer);
5022            }
5023        }
5024
5025        // indicate all active tracks in the chain
5026        for (size_t i = 0 ; i < mActiveTracks.size() ; ++i) {
5027            sp<Track> track = mActiveTracks[i].promote();
5028            if (track == 0) continue;
5029            if (session == track->sessionId()) {
5030                LOGV("addEffectChain_l() activating track %p on session %d", track.get(), session);
5031                chain->startTrack();
5032            }
5033        }
5034    }
5035
5036    chain->setInBuffer(buffer, ownsBuffer);
5037    chain->setOutBuffer(mMixBuffer);
5038    // Effect chain for session AudioSystem::SESSION_OUTPUT_STAGE is inserted at end of effect
5039    // chains list in order to be processed last as it contains output stage effects
5040    // Effect chain for session AudioSystem::SESSION_OUTPUT_MIX is inserted before
5041    // session AudioSystem::SESSION_OUTPUT_STAGE to be processed
5042    // after track specific effects and before output stage
5043    // It is therefore mandatory that AudioSystem::SESSION_OUTPUT_MIX == 0 and
5044    // that AudioSystem::SESSION_OUTPUT_STAGE < AudioSystem::SESSION_OUTPUT_MIX
5045    // Effect chain for other sessions are inserted at beginning of effect
5046    // chains list to be processed before output mix effects. Relative order between other
5047    // sessions is not important
5048    size_t size = mEffectChains.size();
5049    size_t i = 0;
5050    for (i = 0; i < size; i++) {
5051        if (mEffectChains[i]->sessionId() < session) break;
5052    }
5053    mEffectChains.insertAt(chain, i);
5054
5055    return NO_ERROR;
5056}
5057
5058size_t AudioFlinger::PlaybackThread::removeEffectChain_l(const sp<EffectChain>& chain)
5059{
5060    int session = chain->sessionId();
5061
5062    LOGV("removeEffectChain_l() %p from thread %p for session %d", chain.get(), this, session);
5063
5064    for (size_t i = 0; i < mEffectChains.size(); i++) {
5065        if (chain == mEffectChains[i]) {
5066            mEffectChains.removeAt(i);
5067            // detach all tracks with same session ID from this chain
5068            for (size_t i = 0; i < mTracks.size(); ++i) {
5069                sp<Track> track = mTracks[i];
5070                if (session == track->sessionId()) {
5071                    track->setMainBuffer(mMixBuffer);
5072                }
5073            }
5074            break;
5075        }
5076    }
5077    return mEffectChains.size();
5078}
5079
5080void AudioFlinger::PlaybackThread::lockEffectChains_l(
5081        Vector<sp <AudioFlinger::EffectChain> >& effectChains)
5082{
5083    effectChains = mEffectChains;
5084    for (size_t i = 0; i < mEffectChains.size(); i++) {
5085        mEffectChains[i]->lock();
5086    }
5087}
5088
5089void AudioFlinger::PlaybackThread::unlockEffectChains(
5090        Vector<sp <AudioFlinger::EffectChain> >& effectChains)
5091{
5092    for (size_t i = 0; i < effectChains.size(); i++) {
5093        effectChains[i]->unlock();
5094    }
5095}
5096
5097
5098sp<AudioFlinger::EffectModule> AudioFlinger::PlaybackThread::getEffect_l(int sessionId, int effectId)
5099{
5100    sp<EffectModule> effect;
5101
5102    sp<EffectChain> chain = getEffectChain_l(sessionId);
5103    if (chain != 0) {
5104        effect = chain->getEffectFromId_l(effectId);
5105    }
5106    return effect;
5107}
5108
5109status_t AudioFlinger::PlaybackThread::attachAuxEffect(
5110        const sp<AudioFlinger::PlaybackThread::Track> track, int EffectId)
5111{
5112    Mutex::Autolock _l(mLock);
5113    return attachAuxEffect_l(track, EffectId);
5114}
5115
5116status_t AudioFlinger::PlaybackThread::attachAuxEffect_l(
5117        const sp<AudioFlinger::PlaybackThread::Track> track, int EffectId)
5118{
5119    status_t status = NO_ERROR;
5120
5121    if (EffectId == 0) {
5122        track->setAuxBuffer(0, NULL);
5123    } else {
5124        // Auxiliary effects are always in audio session AudioSystem::SESSION_OUTPUT_MIX
5125        sp<EffectModule> effect = getEffect_l(AudioSystem::SESSION_OUTPUT_MIX, EffectId);
5126        if (effect != 0) {
5127            if ((effect->desc().flags & EFFECT_FLAG_TYPE_MASK) == EFFECT_FLAG_TYPE_AUXILIARY) {
5128                track->setAuxBuffer(EffectId, (int32_t *)effect->inBuffer());
5129            } else {
5130                status = INVALID_OPERATION;
5131            }
5132        } else {
5133            status = BAD_VALUE;
5134        }
5135    }
5136    return status;
5137}
5138
5139void AudioFlinger::PlaybackThread::detachAuxEffect_l(int effectId)
5140{
5141     for (size_t i = 0; i < mTracks.size(); ++i) {
5142        sp<Track> track = mTracks[i];
5143        if (track->auxEffectId() == effectId) {
5144            attachAuxEffect_l(track, 0);
5145        }
5146    }
5147}
5148
5149// ----------------------------------------------------------------------------
5150//  EffectModule implementation
5151// ----------------------------------------------------------------------------
5152
5153#undef LOG_TAG
5154#define LOG_TAG "AudioFlinger::EffectModule"
5155
5156AudioFlinger::EffectModule::EffectModule(const wp<ThreadBase>& wThread,
5157                                        const wp<AudioFlinger::EffectChain>& chain,
5158                                        effect_descriptor_t *desc,
5159                                        int id,
5160                                        int sessionId)
5161    : mThread(wThread), mChain(chain), mId(id), mSessionId(sessionId), mEffectInterface(NULL),
5162      mStatus(NO_INIT), mState(IDLE)
5163{
5164    LOGV("Constructor %p", this);
5165    int lStatus;
5166    sp<ThreadBase> thread = mThread.promote();
5167    if (thread == 0) {
5168        return;
5169    }
5170    PlaybackThread *p = (PlaybackThread *)thread.get();
5171
5172    memcpy(&mDescriptor, desc, sizeof(effect_descriptor_t));
5173
5174    // create effect engine from effect factory
5175    mStatus = EffectCreate(&desc->uuid, sessionId, p->id(), &mEffectInterface);
5176
5177    if (mStatus != NO_ERROR) {
5178        return;
5179    }
5180    lStatus = init();
5181    if (lStatus < 0) {
5182        mStatus = lStatus;
5183        goto Error;
5184    }
5185
5186    LOGV("Constructor success name %s, Interface %p", mDescriptor.name, mEffectInterface);
5187    return;
5188Error:
5189    EffectRelease(mEffectInterface);
5190    mEffectInterface = NULL;
5191    LOGV("Constructor Error %d", mStatus);
5192}
5193
5194AudioFlinger::EffectModule::~EffectModule()
5195{
5196    LOGV("Destructor %p", this);
5197    if (mEffectInterface != NULL) {
5198        // release effect engine
5199        EffectRelease(mEffectInterface);
5200    }
5201}
5202
5203status_t AudioFlinger::EffectModule::addHandle(sp<EffectHandle>& handle)
5204{
5205    status_t status;
5206
5207    Mutex::Autolock _l(mLock);
5208    // First handle in mHandles has highest priority and controls the effect module
5209    int priority = handle->priority();
5210    size_t size = mHandles.size();
5211    sp<EffectHandle> h;
5212    size_t i;
5213    for (i = 0; i < size; i++) {
5214        h = mHandles[i].promote();
5215        if (h == 0) continue;
5216        if (h->priority() <= priority) break;
5217    }
5218    // if inserted in first place, move effect control from previous owner to this handle
5219    if (i == 0) {
5220        if (h != 0) {
5221            h->setControl(false, true);
5222        }
5223        handle->setControl(true, false);
5224        status = NO_ERROR;
5225    } else {
5226        status = ALREADY_EXISTS;
5227    }
5228    mHandles.insertAt(handle, i);
5229    return status;
5230}
5231
5232size_t AudioFlinger::EffectModule::removeHandle(const wp<EffectHandle>& handle)
5233{
5234    Mutex::Autolock _l(mLock);
5235    size_t size = mHandles.size();
5236    size_t i;
5237    for (i = 0; i < size; i++) {
5238        if (mHandles[i] == handle) break;
5239    }
5240    if (i == size) {
5241        return size;
5242    }
5243    mHandles.removeAt(i);
5244    size = mHandles.size();
5245    // if removed from first place, move effect control from this handle to next in line
5246    if (i == 0 && size != 0) {
5247        sp<EffectHandle> h = mHandles[0].promote();
5248        if (h != 0) {
5249            h->setControl(true, true);
5250        }
5251    }
5252
5253    // Release effect engine here so that it is done immediately. Otherwise it will be released
5254    // by the destructor when the last strong reference on the this object is released which can
5255    // happen after next process is called on this effect.
5256    if (size == 0 && mEffectInterface != NULL) {
5257        // release effect engine
5258        EffectRelease(mEffectInterface);
5259        mEffectInterface = NULL;
5260    }
5261
5262    return size;
5263}
5264
5265void AudioFlinger::EffectModule::disconnect(const wp<EffectHandle>& handle)
5266{
5267    // keep a strong reference on this EffectModule to avoid calling the
5268    // destructor before we exit
5269    sp<EffectModule> keep(this);
5270    {
5271        sp<ThreadBase> thread = mThread.promote();
5272        if (thread != 0) {
5273            PlaybackThread *playbackThread = (PlaybackThread *)thread.get();
5274            playbackThread->disconnectEffect(keep, handle);
5275        }
5276    }
5277}
5278
5279void AudioFlinger::EffectModule::updateState() {
5280    Mutex::Autolock _l(mLock);
5281
5282    switch (mState) {
5283    case RESTART:
5284        reset_l();
5285        // FALL THROUGH
5286
5287    case STARTING:
5288        // clear auxiliary effect input buffer for next accumulation
5289        if ((mDescriptor.flags & EFFECT_FLAG_TYPE_MASK) == EFFECT_FLAG_TYPE_AUXILIARY) {
5290            memset(mConfig.inputCfg.buffer.raw,
5291                   0,
5292                   mConfig.inputCfg.buffer.frameCount*sizeof(int32_t));
5293        }
5294        start_l();
5295        mState = ACTIVE;
5296        break;
5297    case STOPPING:
5298        stop_l();
5299        mDisableWaitCnt = mMaxDisableWaitCnt;
5300        mState = STOPPED;
5301        break;
5302    case STOPPED:
5303        // mDisableWaitCnt is forced to 1 by process() when the engine indicates the end of the
5304        // turn off sequence.
5305        if (--mDisableWaitCnt == 0) {
5306            reset_l();
5307            mState = IDLE;
5308        }
5309        break;
5310    default: //IDLE , ACTIVE
5311        break;
5312    }
5313}
5314
5315void AudioFlinger::EffectModule::process()
5316{
5317    Mutex::Autolock _l(mLock);
5318
5319    if (mEffectInterface == NULL ||
5320            mConfig.inputCfg.buffer.raw == NULL ||
5321            mConfig.outputCfg.buffer.raw == NULL) {
5322        return;
5323    }
5324
5325    if (isProcessEnabled()) {
5326        // do 32 bit to 16 bit conversion for auxiliary effect input buffer
5327        if ((mDescriptor.flags & EFFECT_FLAG_TYPE_MASK) == EFFECT_FLAG_TYPE_AUXILIARY) {
5328            AudioMixer::ditherAndClamp(mConfig.inputCfg.buffer.s32,
5329                                        mConfig.inputCfg.buffer.s32,
5330                                        mConfig.inputCfg.buffer.frameCount/2);
5331        }
5332
5333        // do the actual processing in the effect engine
5334        int ret = (*mEffectInterface)->process(mEffectInterface,
5335                                               &mConfig.inputCfg.buffer,
5336                                               &mConfig.outputCfg.buffer);
5337
5338        // force transition to IDLE state when engine is ready
5339        if (mState == STOPPED && ret == -ENODATA) {
5340            mDisableWaitCnt = 1;
5341        }
5342
5343        // clear auxiliary effect input buffer for next accumulation
5344        if ((mDescriptor.flags & EFFECT_FLAG_TYPE_MASK) == EFFECT_FLAG_TYPE_AUXILIARY) {
5345            memset(mConfig.inputCfg.buffer.raw, 0,
5346                   mConfig.inputCfg.buffer.frameCount*sizeof(int32_t));
5347        }
5348    } else if ((mDescriptor.flags & EFFECT_FLAG_TYPE_MASK) == EFFECT_FLAG_TYPE_INSERT &&
5349                mConfig.inputCfg.buffer.raw != mConfig.outputCfg.buffer.raw) {
5350        // If an insert effect is idle and input buffer is different from output buffer,
5351        // accumulate input onto output
5352        sp<EffectChain> chain = mChain.promote();
5353        if (chain != 0 && chain->activeTracks() != 0) {
5354            size_t frameCnt = mConfig.inputCfg.buffer.frameCount * 2;  //always stereo here
5355            int16_t *in = mConfig.inputCfg.buffer.s16;
5356            int16_t *out = mConfig.outputCfg.buffer.s16;
5357            for (size_t i = 0; i < frameCnt; i++) {
5358                out[i] = clamp16((int32_t)out[i] + (int32_t)in[i]);
5359            }
5360        }
5361    }
5362}
5363
5364void AudioFlinger::EffectModule::reset_l()
5365{
5366    if (mEffectInterface == NULL) {
5367        return;
5368    }
5369    (*mEffectInterface)->command(mEffectInterface, EFFECT_CMD_RESET, 0, NULL, 0, NULL);
5370}
5371
5372status_t AudioFlinger::EffectModule::configure()
5373{
5374    uint32_t channels;
5375    if (mEffectInterface == NULL) {
5376        return NO_INIT;
5377    }
5378
5379    sp<ThreadBase> thread = mThread.promote();
5380    if (thread == 0) {
5381        return DEAD_OBJECT;
5382    }
5383
5384    // TODO: handle configuration of effects replacing track process
5385    if (thread->channelCount() == 1) {
5386        channels = CHANNEL_MONO;
5387    } else {
5388        channels = CHANNEL_STEREO;
5389    }
5390
5391    if ((mDescriptor.flags & EFFECT_FLAG_TYPE_MASK) == EFFECT_FLAG_TYPE_AUXILIARY) {
5392        mConfig.inputCfg.channels = CHANNEL_MONO;
5393    } else {
5394        mConfig.inputCfg.channels = channels;
5395    }
5396    mConfig.outputCfg.channels = channels;
5397    mConfig.inputCfg.format = SAMPLE_FORMAT_PCM_S15;
5398    mConfig.outputCfg.format = SAMPLE_FORMAT_PCM_S15;
5399    mConfig.inputCfg.samplingRate = thread->sampleRate();
5400    mConfig.outputCfg.samplingRate = mConfig.inputCfg.samplingRate;
5401    mConfig.inputCfg.bufferProvider.cookie = NULL;
5402    mConfig.inputCfg.bufferProvider.getBuffer = NULL;
5403    mConfig.inputCfg.bufferProvider.releaseBuffer = NULL;
5404    mConfig.outputCfg.bufferProvider.cookie = NULL;
5405    mConfig.outputCfg.bufferProvider.getBuffer = NULL;
5406    mConfig.outputCfg.bufferProvider.releaseBuffer = NULL;
5407    mConfig.inputCfg.accessMode = EFFECT_BUFFER_ACCESS_READ;
5408    // Insert effect:
5409    // - in session AudioSystem::SESSION_OUTPUT_MIX or AudioSystem::SESSION_OUTPUT_STAGE,
5410    // always overwrites output buffer: input buffer == output buffer
5411    // - in other sessions:
5412    //      last effect in the chain accumulates in output buffer: input buffer != output buffer
5413    //      other effect: overwrites output buffer: input buffer == output buffer
5414    // Auxiliary effect:
5415    //      accumulates in output buffer: input buffer != output buffer
5416    // Therefore: accumulate <=> input buffer != output buffer
5417    if (mConfig.inputCfg.buffer.raw != mConfig.outputCfg.buffer.raw) {
5418        mConfig.outputCfg.accessMode = EFFECT_BUFFER_ACCESS_ACCUMULATE;
5419    } else {
5420        mConfig.outputCfg.accessMode = EFFECT_BUFFER_ACCESS_WRITE;
5421    }
5422    mConfig.inputCfg.mask = EFFECT_CONFIG_ALL;
5423    mConfig.outputCfg.mask = EFFECT_CONFIG_ALL;
5424    mConfig.inputCfg.buffer.frameCount = thread->frameCount();
5425    mConfig.outputCfg.buffer.frameCount = mConfig.inputCfg.buffer.frameCount;
5426
5427    LOGV("configure() %p thread %p buffer %p framecount %d",
5428            this, thread.get(), mConfig.inputCfg.buffer.raw, mConfig.inputCfg.buffer.frameCount);
5429
5430    status_t cmdStatus;
5431    uint32_t size = sizeof(int);
5432    status_t status = (*mEffectInterface)->command(mEffectInterface,
5433                                                   EFFECT_CMD_CONFIGURE,
5434                                                   sizeof(effect_config_t),
5435                                                   &mConfig,
5436                                                   &size,
5437                                                   &cmdStatus);
5438    if (status == 0) {
5439        status = cmdStatus;
5440    }
5441
5442    mMaxDisableWaitCnt = (MAX_DISABLE_TIME_MS * mConfig.outputCfg.samplingRate) /
5443            (1000 * mConfig.outputCfg.buffer.frameCount);
5444
5445    return status;
5446}
5447
5448status_t AudioFlinger::EffectModule::init()
5449{
5450    Mutex::Autolock _l(mLock);
5451    if (mEffectInterface == NULL) {
5452        return NO_INIT;
5453    }
5454    status_t cmdStatus;
5455    uint32_t size = sizeof(status_t);
5456    status_t status = (*mEffectInterface)->command(mEffectInterface,
5457                                                   EFFECT_CMD_INIT,
5458                                                   0,
5459                                                   NULL,
5460                                                   &size,
5461                                                   &cmdStatus);
5462    if (status == 0) {
5463        status = cmdStatus;
5464    }
5465    return status;
5466}
5467
5468status_t AudioFlinger::EffectModule::start_l()
5469{
5470    if (mEffectInterface == NULL) {
5471        return NO_INIT;
5472    }
5473    status_t cmdStatus;
5474    uint32_t size = sizeof(status_t);
5475    status_t status = (*mEffectInterface)->command(mEffectInterface,
5476                                                   EFFECT_CMD_ENABLE,
5477                                                   0,
5478                                                   NULL,
5479                                                   &size,
5480                                                   &cmdStatus);
5481    if (status == 0) {
5482        status = cmdStatus;
5483    }
5484    return status;
5485}
5486
5487status_t AudioFlinger::EffectModule::stop_l()
5488{
5489    if (mEffectInterface == NULL) {
5490        return NO_INIT;
5491    }
5492    status_t cmdStatus;
5493    uint32_t size = sizeof(status_t);
5494    status_t status = (*mEffectInterface)->command(mEffectInterface,
5495                                                   EFFECT_CMD_DISABLE,
5496                                                   0,
5497                                                   NULL,
5498                                                   &size,
5499                                                   &cmdStatus);
5500    if (status == 0) {
5501        status = cmdStatus;
5502    }
5503    return status;
5504}
5505
5506status_t AudioFlinger::EffectModule::command(uint32_t cmdCode,
5507                                             uint32_t cmdSize,
5508                                             void *pCmdData,
5509                                             uint32_t *replySize,
5510                                             void *pReplyData)
5511{
5512    Mutex::Autolock _l(mLock);
5513//    LOGV("command(), cmdCode: %d, mEffectInterface: %p", cmdCode, mEffectInterface);
5514
5515    if (mEffectInterface == NULL) {
5516        return NO_INIT;
5517    }
5518    status_t status = (*mEffectInterface)->command(mEffectInterface,
5519                                                   cmdCode,
5520                                                   cmdSize,
5521                                                   pCmdData,
5522                                                   replySize,
5523                                                   pReplyData);
5524    if (cmdCode != EFFECT_CMD_GET_PARAM && status == NO_ERROR) {
5525        uint32_t size = (replySize == NULL) ? 0 : *replySize;
5526        for (size_t i = 1; i < mHandles.size(); i++) {
5527            sp<EffectHandle> h = mHandles[i].promote();
5528            if (h != 0) {
5529                h->commandExecuted(cmdCode, cmdSize, pCmdData, size, pReplyData);
5530            }
5531        }
5532    }
5533    return status;
5534}
5535
5536status_t AudioFlinger::EffectModule::setEnabled(bool enabled)
5537{
5538    Mutex::Autolock _l(mLock);
5539    LOGV("setEnabled %p enabled %d", this, enabled);
5540
5541    if (enabled != isEnabled()) {
5542        switch (mState) {
5543        // going from disabled to enabled
5544        case IDLE:
5545            mState = STARTING;
5546            break;
5547        case STOPPED:
5548            mState = RESTART;
5549            break;
5550        case STOPPING:
5551            mState = ACTIVE;
5552            break;
5553
5554        // going from enabled to disabled
5555        case RESTART:
5556            mState = STOPPED;
5557            break;
5558        case STARTING:
5559            mState = IDLE;
5560            break;
5561        case ACTIVE:
5562            mState = STOPPING;
5563            break;
5564        }
5565        for (size_t i = 1; i < mHandles.size(); i++) {
5566            sp<EffectHandle> h = mHandles[i].promote();
5567            if (h != 0) {
5568                h->setEnabled(enabled);
5569            }
5570        }
5571    }
5572    return NO_ERROR;
5573}
5574
5575bool AudioFlinger::EffectModule::isEnabled()
5576{
5577    switch (mState) {
5578    case RESTART:
5579    case STARTING:
5580    case ACTIVE:
5581        return true;
5582    case IDLE:
5583    case STOPPING:
5584    case STOPPED:
5585    default:
5586        return false;
5587    }
5588}
5589
5590bool AudioFlinger::EffectModule::isProcessEnabled()
5591{
5592    switch (mState) {
5593    case RESTART:
5594    case ACTIVE:
5595    case STOPPING:
5596    case STOPPED:
5597        return true;
5598    case IDLE:
5599    case STARTING:
5600    default:
5601        return false;
5602    }
5603}
5604
5605status_t AudioFlinger::EffectModule::setVolume(uint32_t *left, uint32_t *right, bool controller)
5606{
5607    Mutex::Autolock _l(mLock);
5608    status_t status = NO_ERROR;
5609
5610    // Send volume indication if EFFECT_FLAG_VOLUME_IND is set and read back altered volume
5611    // if controller flag is set (Note that controller == TRUE => EFFECT_FLAG_VOLUME_CTRL set)
5612    if (isProcessEnabled() &&
5613            ((mDescriptor.flags & EFFECT_FLAG_VOLUME_MASK) == EFFECT_FLAG_VOLUME_CTRL ||
5614            (mDescriptor.flags & EFFECT_FLAG_VOLUME_MASK) == EFFECT_FLAG_VOLUME_IND)) {
5615        status_t cmdStatus;
5616        uint32_t volume[2];
5617        uint32_t *pVolume = NULL;
5618        uint32_t size = sizeof(volume);
5619        volume[0] = *left;
5620        volume[1] = *right;
5621        if (controller) {
5622            pVolume = volume;
5623        }
5624        status = (*mEffectInterface)->command(mEffectInterface,
5625                                              EFFECT_CMD_SET_VOLUME,
5626                                              size,
5627                                              volume,
5628                                              &size,
5629                                              pVolume);
5630        if (controller && status == NO_ERROR && size == sizeof(volume)) {
5631            *left = volume[0];
5632            *right = volume[1];
5633        }
5634    }
5635    return status;
5636}
5637
5638status_t AudioFlinger::EffectModule::setDevice(uint32_t device)
5639{
5640    Mutex::Autolock _l(mLock);
5641    status_t status = NO_ERROR;
5642    if ((mDescriptor.flags & EFFECT_FLAG_DEVICE_MASK) == EFFECT_FLAG_DEVICE_IND) {
5643        // convert device bit field from AudioSystem to EffectApi format.
5644        device = deviceAudioSystemToEffectApi(device);
5645        if (device == 0) {
5646            return BAD_VALUE;
5647        }
5648        status_t cmdStatus;
5649        uint32_t size = sizeof(status_t);
5650        status = (*mEffectInterface)->command(mEffectInterface,
5651                                              EFFECT_CMD_SET_DEVICE,
5652                                              sizeof(uint32_t),
5653                                              &device,
5654                                              &size,
5655                                              &cmdStatus);
5656        if (status == NO_ERROR) {
5657            status = cmdStatus;
5658        }
5659    }
5660    return status;
5661}
5662
5663status_t AudioFlinger::EffectModule::setMode(uint32_t mode)
5664{
5665    Mutex::Autolock _l(mLock);
5666    status_t status = NO_ERROR;
5667    if ((mDescriptor.flags & EFFECT_FLAG_AUDIO_MODE_MASK) == EFFECT_FLAG_AUDIO_MODE_IND) {
5668        // convert audio mode from AudioSystem to EffectApi format.
5669        int effectMode = modeAudioSystemToEffectApi(mode);
5670        if (effectMode < 0) {
5671            return BAD_VALUE;
5672        }
5673        status_t cmdStatus;
5674        uint32_t size = sizeof(status_t);
5675        status = (*mEffectInterface)->command(mEffectInterface,
5676                                              EFFECT_CMD_SET_AUDIO_MODE,
5677                                              sizeof(int),
5678                                              &effectMode,
5679                                              &size,
5680                                              &cmdStatus);
5681        if (status == NO_ERROR) {
5682            status = cmdStatus;
5683        }
5684    }
5685    return status;
5686}
5687
5688// update this table when AudioSystem::audio_devices or audio_device_e (in EffectApi.h) are modified
5689const uint32_t AudioFlinger::EffectModule::sDeviceConvTable[] = {
5690    DEVICE_EARPIECE, // AudioSystem::DEVICE_OUT_EARPIECE
5691    DEVICE_SPEAKER, // AudioSystem::DEVICE_OUT_SPEAKER
5692    DEVICE_WIRED_HEADSET, // case AudioSystem::DEVICE_OUT_WIRED_HEADSET
5693    DEVICE_WIRED_HEADPHONE, // AudioSystem::DEVICE_OUT_WIRED_HEADPHONE
5694    DEVICE_BLUETOOTH_SCO, // AudioSystem::DEVICE_OUT_BLUETOOTH_SCO
5695    DEVICE_BLUETOOTH_SCO_HEADSET, // AudioSystem::DEVICE_OUT_BLUETOOTH_SCO_HEADSET
5696    DEVICE_BLUETOOTH_SCO_CARKIT, //  AudioSystem::DEVICE_OUT_BLUETOOTH_SCO_CARKIT
5697    DEVICE_BLUETOOTH_A2DP, //  AudioSystem::DEVICE_OUT_BLUETOOTH_A2DP
5698    DEVICE_BLUETOOTH_A2DP_HEADPHONES, // AudioSystem::DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES
5699    DEVICE_BLUETOOTH_A2DP_SPEAKER, // AudioSystem::DEVICE_OUT_BLUETOOTH_A2DP_SPEAKER
5700    DEVICE_AUX_DIGITAL // AudioSystem::DEVICE_OUT_AUX_DIGITAL
5701};
5702
5703uint32_t AudioFlinger::EffectModule::deviceAudioSystemToEffectApi(uint32_t device)
5704{
5705    uint32_t deviceOut = 0;
5706    while (device) {
5707        const uint32_t i = 31 - __builtin_clz(device);
5708        device &= ~(1 << i);
5709        if (i >= sizeof(sDeviceConvTable)/sizeof(uint32_t)) {
5710            LOGE("device convertion error for AudioSystem device 0x%08x", device);
5711            return 0;
5712        }
5713        deviceOut |= (uint32_t)sDeviceConvTable[i];
5714    }
5715    return deviceOut;
5716}
5717
5718// update this table when AudioSystem::audio_mode or audio_mode_e (in EffectApi.h) are modified
5719const uint32_t AudioFlinger::EffectModule::sModeConvTable[] = {
5720    AUDIO_MODE_NORMAL,   // AudioSystem::MODE_NORMAL
5721    AUDIO_MODE_RINGTONE, // AudioSystem::MODE_RINGTONE
5722    AUDIO_MODE_IN_CALL,  // AudioSystem::MODE_IN_CALL
5723    AUDIO_MODE_IN_CALL   // AudioSystem::MODE_IN_COMMUNICATION, same conversion as for MODE_IN_CALL
5724};
5725
5726int AudioFlinger::EffectModule::modeAudioSystemToEffectApi(uint32_t mode)
5727{
5728    int modeOut = -1;
5729    if (mode < sizeof(sModeConvTable) / sizeof(uint32_t)) {
5730        modeOut = (int)sModeConvTable[mode];
5731    }
5732    return modeOut;
5733}
5734
5735status_t AudioFlinger::EffectModule::dump(int fd, const Vector<String16>& args)
5736{
5737    const size_t SIZE = 256;
5738    char buffer[SIZE];
5739    String8 result;
5740
5741    snprintf(buffer, SIZE, "\tEffect ID %d:\n", mId);
5742    result.append(buffer);
5743
5744    bool locked = tryLock(mLock);
5745    // failed to lock - AudioFlinger is probably deadlocked
5746    if (!locked) {
5747        result.append("\t\tCould not lock Fx mutex:\n");
5748    }
5749
5750    result.append("\t\tSession Status State Engine:\n");
5751    snprintf(buffer, SIZE, "\t\t%05d   %03d    %03d   0x%08x\n",
5752            mSessionId, mStatus, mState, (uint32_t)mEffectInterface);
5753    result.append(buffer);
5754
5755    result.append("\t\tDescriptor:\n");
5756    snprintf(buffer, SIZE, "\t\t- UUID: %08X-%04X-%04X-%04X-%02X%02X%02X%02X%02X%02X\n",
5757            mDescriptor.uuid.timeLow, mDescriptor.uuid.timeMid, mDescriptor.uuid.timeHiAndVersion,
5758            mDescriptor.uuid.clockSeq, mDescriptor.uuid.node[0], mDescriptor.uuid.node[1],mDescriptor.uuid.node[2],
5759            mDescriptor.uuid.node[3],mDescriptor.uuid.node[4],mDescriptor.uuid.node[5]);
5760    result.append(buffer);
5761    snprintf(buffer, SIZE, "\t\t- TYPE: %08X-%04X-%04X-%04X-%02X%02X%02X%02X%02X%02X\n",
5762                mDescriptor.type.timeLow, mDescriptor.type.timeMid, mDescriptor.type.timeHiAndVersion,
5763                mDescriptor.type.clockSeq, mDescriptor.type.node[0], mDescriptor.type.node[1],mDescriptor.type.node[2],
5764                mDescriptor.type.node[3],mDescriptor.type.node[4],mDescriptor.type.node[5]);
5765    result.append(buffer);
5766    snprintf(buffer, SIZE, "\t\t- apiVersion: %04X\n\t\t- flags: %08X\n",
5767            mDescriptor.apiVersion,
5768            mDescriptor.flags);
5769    result.append(buffer);
5770    snprintf(buffer, SIZE, "\t\t- name: %s\n",
5771            mDescriptor.name);
5772    result.append(buffer);
5773    snprintf(buffer, SIZE, "\t\t- implementor: %s\n",
5774            mDescriptor.implementor);
5775    result.append(buffer);
5776
5777    result.append("\t\t- Input configuration:\n");
5778    result.append("\t\t\tBuffer     Frames  Smp rate Channels Format\n");
5779    snprintf(buffer, SIZE, "\t\t\t0x%08x %05d   %05d    %08x %d\n",
5780            (uint32_t)mConfig.inputCfg.buffer.raw,
5781            mConfig.inputCfg.buffer.frameCount,
5782            mConfig.inputCfg.samplingRate,
5783            mConfig.inputCfg.channels,
5784            mConfig.inputCfg.format);
5785    result.append(buffer);
5786
5787    result.append("\t\t- Output configuration:\n");
5788    result.append("\t\t\tBuffer     Frames  Smp rate Channels Format\n");
5789    snprintf(buffer, SIZE, "\t\t\t0x%08x %05d   %05d    %08x %d\n",
5790            (uint32_t)mConfig.outputCfg.buffer.raw,
5791            mConfig.outputCfg.buffer.frameCount,
5792            mConfig.outputCfg.samplingRate,
5793            mConfig.outputCfg.channels,
5794            mConfig.outputCfg.format);
5795    result.append(buffer);
5796
5797    snprintf(buffer, SIZE, "\t\t%d Clients:\n", mHandles.size());
5798    result.append(buffer);
5799    result.append("\t\t\tPid   Priority Ctrl Locked client server\n");
5800    for (size_t i = 0; i < mHandles.size(); ++i) {
5801        sp<EffectHandle> handle = mHandles[i].promote();
5802        if (handle != 0) {
5803            handle->dump(buffer, SIZE);
5804            result.append(buffer);
5805        }
5806    }
5807
5808    result.append("\n");
5809
5810    write(fd, result.string(), result.length());
5811
5812    if (locked) {
5813        mLock.unlock();
5814    }
5815
5816    return NO_ERROR;
5817}
5818
5819// ----------------------------------------------------------------------------
5820//  EffectHandle implementation
5821// ----------------------------------------------------------------------------
5822
5823#undef LOG_TAG
5824#define LOG_TAG "AudioFlinger::EffectHandle"
5825
5826AudioFlinger::EffectHandle::EffectHandle(const sp<EffectModule>& effect,
5827                                        const sp<AudioFlinger::Client>& client,
5828                                        const sp<IEffectClient>& effectClient,
5829                                        int32_t priority)
5830    : BnEffect(),
5831    mEffect(effect), mEffectClient(effectClient), mClient(client), mPriority(priority), mHasControl(false)
5832{
5833    LOGV("constructor %p", this);
5834
5835    int bufOffset = ((sizeof(effect_param_cblk_t) - 1) / sizeof(int) + 1) * sizeof(int);
5836    mCblkMemory = client->heap()->allocate(EFFECT_PARAM_BUFFER_SIZE + bufOffset);
5837    if (mCblkMemory != 0) {
5838        mCblk = static_cast<effect_param_cblk_t *>(mCblkMemory->pointer());
5839
5840        if (mCblk) {
5841            new(mCblk) effect_param_cblk_t();
5842            mBuffer = (uint8_t *)mCblk + bufOffset;
5843         }
5844    } else {
5845        LOGE("not enough memory for Effect size=%u", EFFECT_PARAM_BUFFER_SIZE + sizeof(effect_param_cblk_t));
5846        return;
5847    }
5848}
5849
5850AudioFlinger::EffectHandle::~EffectHandle()
5851{
5852    LOGV("Destructor %p", this);
5853    disconnect();
5854}
5855
5856status_t AudioFlinger::EffectHandle::enable()
5857{
5858    if (!mHasControl) return INVALID_OPERATION;
5859    if (mEffect == 0) return DEAD_OBJECT;
5860
5861    return mEffect->setEnabled(true);
5862}
5863
5864status_t AudioFlinger::EffectHandle::disable()
5865{
5866    if (!mHasControl) return INVALID_OPERATION;
5867    if (mEffect == NULL) return DEAD_OBJECT;
5868
5869    return mEffect->setEnabled(false);
5870}
5871
5872void AudioFlinger::EffectHandle::disconnect()
5873{
5874    if (mEffect == 0) {
5875        return;
5876    }
5877    mEffect->disconnect(this);
5878    // release sp on module => module destructor can be called now
5879    mEffect.clear();
5880    if (mCblk) {
5881        mCblk->~effect_param_cblk_t();   // destroy our shared-structure.
5882    }
5883    mCblkMemory.clear();            // and free the shared memory
5884    if (mClient != 0) {
5885        Mutex::Autolock _l(mClient->audioFlinger()->mLock);
5886        mClient.clear();
5887    }
5888}
5889
5890status_t AudioFlinger::EffectHandle::command(uint32_t cmdCode,
5891                                             uint32_t cmdSize,
5892                                             void *pCmdData,
5893                                             uint32_t *replySize,
5894                                             void *pReplyData)
5895{
5896//    LOGV("command(), cmdCode: %d, mHasControl: %d, mEffect: %p",
5897//              cmdCode, mHasControl, (mEffect == 0) ? 0 : mEffect.get());
5898
5899    // only get parameter command is permitted for applications not controlling the effect
5900    if (!mHasControl && cmdCode != EFFECT_CMD_GET_PARAM) {
5901        return INVALID_OPERATION;
5902    }
5903    if (mEffect == 0) return DEAD_OBJECT;
5904
5905    // handle commands that are not forwarded transparently to effect engine
5906    if (cmdCode == EFFECT_CMD_SET_PARAM_COMMIT) {
5907        // No need to trylock() here as this function is executed in the binder thread serving a particular client process:
5908        // no risk to block the whole media server process or mixer threads is we are stuck here
5909        Mutex::Autolock _l(mCblk->lock);
5910        if (mCblk->clientIndex > EFFECT_PARAM_BUFFER_SIZE ||
5911            mCblk->serverIndex > EFFECT_PARAM_BUFFER_SIZE) {
5912            mCblk->serverIndex = 0;
5913            mCblk->clientIndex = 0;
5914            return BAD_VALUE;
5915        }
5916        status_t status = NO_ERROR;
5917        while (mCblk->serverIndex < mCblk->clientIndex) {
5918            int reply;
5919            uint32_t rsize = sizeof(int);
5920            int *p = (int *)(mBuffer + mCblk->serverIndex);
5921            int size = *p++;
5922            if (((uint8_t *)p + size) > mBuffer + mCblk->clientIndex) {
5923                LOGW("command(): invalid parameter block size");
5924                break;
5925            }
5926            effect_param_t *param = (effect_param_t *)p;
5927            if (param->psize == 0 || param->vsize == 0) {
5928                LOGW("command(): null parameter or value size");
5929                mCblk->serverIndex += size;
5930                continue;
5931            }
5932            uint32_t psize = sizeof(effect_param_t) +
5933                             ((param->psize - 1) / sizeof(int) + 1) * sizeof(int) +
5934                             param->vsize;
5935            status_t ret = mEffect->command(EFFECT_CMD_SET_PARAM,
5936                                            psize,
5937                                            p,
5938                                            &rsize,
5939                                            &reply);
5940            // stop at first error encountered
5941            if (ret != NO_ERROR) {
5942                status = ret;
5943                *(int *)pReplyData = reply;
5944                break;
5945            } else if (reply != NO_ERROR) {
5946                *(int *)pReplyData = reply;
5947                break;
5948            }
5949            mCblk->serverIndex += size;
5950        }
5951        mCblk->serverIndex = 0;
5952        mCblk->clientIndex = 0;
5953        return status;
5954    } else if (cmdCode == EFFECT_CMD_ENABLE) {
5955        *(int *)pReplyData = NO_ERROR;
5956        return enable();
5957    } else if (cmdCode == EFFECT_CMD_DISABLE) {
5958        *(int *)pReplyData = NO_ERROR;
5959        return disable();
5960    }
5961
5962    return mEffect->command(cmdCode, cmdSize, pCmdData, replySize, pReplyData);
5963}
5964
5965sp<IMemory> AudioFlinger::EffectHandle::getCblk() const {
5966    return mCblkMemory;
5967}
5968
5969void AudioFlinger::EffectHandle::setControl(bool hasControl, bool signal)
5970{
5971    LOGV("setControl %p control %d", this, hasControl);
5972
5973    mHasControl = hasControl;
5974    if (signal && mEffectClient != 0) {
5975        mEffectClient->controlStatusChanged(hasControl);
5976    }
5977}
5978
5979void AudioFlinger::EffectHandle::commandExecuted(uint32_t cmdCode,
5980                                                 uint32_t cmdSize,
5981                                                 void *pCmdData,
5982                                                 uint32_t replySize,
5983                                                 void *pReplyData)
5984{
5985    if (mEffectClient != 0) {
5986        mEffectClient->commandExecuted(cmdCode, cmdSize, pCmdData, replySize, pReplyData);
5987    }
5988}
5989
5990
5991
5992void AudioFlinger::EffectHandle::setEnabled(bool enabled)
5993{
5994    if (mEffectClient != 0) {
5995        mEffectClient->enableStatusChanged(enabled);
5996    }
5997}
5998
5999status_t AudioFlinger::EffectHandle::onTransact(
6000    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
6001{
6002    return BnEffect::onTransact(code, data, reply, flags);
6003}
6004
6005
6006void AudioFlinger::EffectHandle::dump(char* buffer, size_t size)
6007{
6008    bool locked = tryLock(mCblk->lock);
6009
6010    snprintf(buffer, size, "\t\t\t%05d %05d    %01u    %01u      %05u  %05u\n",
6011            (mClient == NULL) ? getpid() : mClient->pid(),
6012            mPriority,
6013            mHasControl,
6014            !locked,
6015            mCblk->clientIndex,
6016            mCblk->serverIndex
6017            );
6018
6019    if (locked) {
6020        mCblk->lock.unlock();
6021    }
6022}
6023
6024#undef LOG_TAG
6025#define LOG_TAG "AudioFlinger::EffectChain"
6026
6027AudioFlinger::EffectChain::EffectChain(const wp<ThreadBase>& wThread,
6028                                        int sessionId)
6029    : mThread(wThread), mSessionId(sessionId), mActiveTrackCnt(0), mOwnInBuffer(false),
6030            mVolumeCtrlIdx(-1), mLeftVolume(UINT_MAX), mRightVolume(UINT_MAX),
6031            mNewLeftVolume(UINT_MAX), mNewRightVolume(UINT_MAX)
6032{
6033    mStrategy = AudioSystem::getStrategyForStream(AudioSystem::MUSIC);
6034}
6035
6036AudioFlinger::EffectChain::~EffectChain()
6037{
6038    if (mOwnInBuffer) {
6039        delete mInBuffer;
6040    }
6041
6042}
6043
6044// getEffectFromDesc_l() must be called with PlaybackThread::mLock held
6045sp<AudioFlinger::EffectModule> AudioFlinger::EffectChain::getEffectFromDesc_l(effect_descriptor_t *descriptor)
6046{
6047    sp<EffectModule> effect;
6048    size_t size = mEffects.size();
6049
6050    for (size_t i = 0; i < size; i++) {
6051        if (memcmp(&mEffects[i]->desc().uuid, &descriptor->uuid, sizeof(effect_uuid_t)) == 0) {
6052            effect = mEffects[i];
6053            break;
6054        }
6055    }
6056    return effect;
6057}
6058
6059// getEffectFromId_l() must be called with PlaybackThread::mLock held
6060sp<AudioFlinger::EffectModule> AudioFlinger::EffectChain::getEffectFromId_l(int id)
6061{
6062    sp<EffectModule> effect;
6063    size_t size = mEffects.size();
6064
6065    for (size_t i = 0; i < size; i++) {
6066        // by convention, return first effect if id provided is 0 (0 is never a valid id)
6067        if (id == 0 || mEffects[i]->id() == id) {
6068            effect = mEffects[i];
6069            break;
6070        }
6071    }
6072    return effect;
6073}
6074
6075// Must be called with EffectChain::mLock locked
6076void AudioFlinger::EffectChain::process_l()
6077{
6078    sp<ThreadBase> thread = mThread.promote();
6079    if (thread == 0) {
6080        LOGW("process_l(): cannot promote mixer thread");
6081        return;
6082    }
6083    PlaybackThread *playbackThread = (PlaybackThread *)thread.get();
6084    bool isGlobalSession = (mSessionId == AudioSystem::SESSION_OUTPUT_MIX) ||
6085            (mSessionId == AudioSystem::SESSION_OUTPUT_STAGE);
6086    bool tracksOnSession = false;
6087    if (!isGlobalSession) {
6088        tracksOnSession =
6089                playbackThread->hasAudioSession(mSessionId) & PlaybackThread::TRACK_SESSION;
6090    }
6091
6092    size_t size = mEffects.size();
6093    // do not process effect if no track is present in same audio session
6094    if (isGlobalSession || tracksOnSession) {
6095        for (size_t i = 0; i < size; i++) {
6096            mEffects[i]->process();
6097        }
6098    }
6099    for (size_t i = 0; i < size; i++) {
6100        mEffects[i]->updateState();
6101    }
6102    // if no track is active, input buffer must be cleared here as the mixer process
6103    // will not do it
6104    if (tracksOnSession &&
6105        activeTracks() == 0) {
6106        size_t numSamples = playbackThread->frameCount() * playbackThread->channelCount();
6107        memset(mInBuffer, 0, numSamples * sizeof(int16_t));
6108    }
6109}
6110
6111// addEffect_l() must be called with PlaybackThread::mLock held
6112status_t AudioFlinger::EffectChain::addEffect_l(const sp<EffectModule>& effect)
6113{
6114    effect_descriptor_t desc = effect->desc();
6115    uint32_t insertPref = desc.flags & EFFECT_FLAG_INSERT_MASK;
6116
6117    Mutex::Autolock _l(mLock);
6118    effect->setChain(this);
6119    sp<ThreadBase> thread = mThread.promote();
6120    if (thread == 0) {
6121        return NO_INIT;
6122    }
6123    effect->setThread(thread);
6124
6125    if ((desc.flags & EFFECT_FLAG_TYPE_MASK) == EFFECT_FLAG_TYPE_AUXILIARY) {
6126        // Auxiliary effects are inserted at the beginning of mEffects vector as
6127        // they are processed first and accumulated in chain input buffer
6128        mEffects.insertAt(effect, 0);
6129
6130        // the input buffer for auxiliary effect contains mono samples in
6131        // 32 bit format. This is to avoid saturation in AudoMixer
6132        // accumulation stage. Saturation is done in EffectModule::process() before
6133        // calling the process in effect engine
6134        size_t numSamples = thread->frameCount();
6135        int32_t *buffer = new int32_t[numSamples];
6136        memset(buffer, 0, numSamples * sizeof(int32_t));
6137        effect->setInBuffer((int16_t *)buffer);
6138        // auxiliary effects output samples to chain input buffer for further processing
6139        // by insert effects
6140        effect->setOutBuffer(mInBuffer);
6141    } else {
6142        // Insert effects are inserted at the end of mEffects vector as they are processed
6143        //  after track and auxiliary effects.
6144        // Insert effect order as a function of indicated preference:
6145        //  if EFFECT_FLAG_INSERT_EXCLUSIVE, insert in first position or reject if
6146        //  another effect is present
6147        //  else if EFFECT_FLAG_INSERT_FIRST, insert in first position or after the
6148        //  last effect claiming first position
6149        //  else if EFFECT_FLAG_INSERT_LAST, insert in last position or before the
6150        //  first effect claiming last position
6151        //  else if EFFECT_FLAG_INSERT_ANY insert after first or before last
6152        // Reject insertion if an effect with EFFECT_FLAG_INSERT_EXCLUSIVE is
6153        // already present
6154
6155        int size = (int)mEffects.size();
6156        int idx_insert = size;
6157        int idx_insert_first = -1;
6158        int idx_insert_last = -1;
6159
6160        for (int i = 0; i < size; i++) {
6161            effect_descriptor_t d = mEffects[i]->desc();
6162            uint32_t iMode = d.flags & EFFECT_FLAG_TYPE_MASK;
6163            uint32_t iPref = d.flags & EFFECT_FLAG_INSERT_MASK;
6164            if (iMode == EFFECT_FLAG_TYPE_INSERT) {
6165                // check invalid effect chaining combinations
6166                if (insertPref == EFFECT_FLAG_INSERT_EXCLUSIVE ||
6167                    iPref == EFFECT_FLAG_INSERT_EXCLUSIVE) {
6168                    LOGW("addEffect_l() could not insert effect %s: exclusive conflict with %s", desc.name, d.name);
6169                    return INVALID_OPERATION;
6170                }
6171                // remember position of first insert effect and by default
6172                // select this as insert position for new effect
6173                if (idx_insert == size) {
6174                    idx_insert = i;
6175                }
6176                // remember position of last insert effect claiming
6177                // first position
6178                if (iPref == EFFECT_FLAG_INSERT_FIRST) {
6179                    idx_insert_first = i;
6180                }
6181                // remember position of first insert effect claiming
6182                // last position
6183                if (iPref == EFFECT_FLAG_INSERT_LAST &&
6184                    idx_insert_last == -1) {
6185                    idx_insert_last = i;
6186                }
6187            }
6188        }
6189
6190        // modify idx_insert from first position if needed
6191        if (insertPref == EFFECT_FLAG_INSERT_LAST) {
6192            if (idx_insert_last != -1) {
6193                idx_insert = idx_insert_last;
6194            } else {
6195                idx_insert = size;
6196            }
6197        } else {
6198            if (idx_insert_first != -1) {
6199                idx_insert = idx_insert_first + 1;
6200            }
6201        }
6202
6203        // always read samples from chain input buffer
6204        effect->setInBuffer(mInBuffer);
6205
6206        // if last effect in the chain, output samples to chain
6207        // output buffer, otherwise to chain input buffer
6208        if (idx_insert == size) {
6209            if (idx_insert != 0) {
6210                mEffects[idx_insert-1]->setOutBuffer(mInBuffer);
6211                mEffects[idx_insert-1]->configure();
6212            }
6213            effect->setOutBuffer(mOutBuffer);
6214        } else {
6215            effect->setOutBuffer(mInBuffer);
6216        }
6217        mEffects.insertAt(effect, idx_insert);
6218
6219        LOGV("addEffect_l() effect %p, added in chain %p at rank %d", effect.get(), this, idx_insert);
6220    }
6221    effect->configure();
6222    return NO_ERROR;
6223}
6224
6225// removeEffect_l() must be called with PlaybackThread::mLock held
6226size_t AudioFlinger::EffectChain::removeEffect_l(const sp<EffectModule>& effect)
6227{
6228    Mutex::Autolock _l(mLock);
6229    int size = (int)mEffects.size();
6230    int i;
6231    uint32_t type = effect->desc().flags & EFFECT_FLAG_TYPE_MASK;
6232
6233    for (i = 0; i < size; i++) {
6234        if (effect == mEffects[i]) {
6235            if (type == EFFECT_FLAG_TYPE_AUXILIARY) {
6236                delete[] effect->inBuffer();
6237            } else {
6238                if (i == size - 1 && i != 0) {
6239                    mEffects[i - 1]->setOutBuffer(mOutBuffer);
6240                    mEffects[i - 1]->configure();
6241                }
6242            }
6243            mEffects.removeAt(i);
6244            LOGV("removeEffect_l() effect %p, removed from chain %p at rank %d", effect.get(), this, i);
6245            break;
6246        }
6247    }
6248
6249    return mEffects.size();
6250}
6251
6252// setDevice_l() must be called with PlaybackThread::mLock held
6253void AudioFlinger::EffectChain::setDevice_l(uint32_t device)
6254{
6255    size_t size = mEffects.size();
6256    for (size_t i = 0; i < size; i++) {
6257        mEffects[i]->setDevice(device);
6258    }
6259}
6260
6261// setMode_l() must be called with PlaybackThread::mLock held
6262void AudioFlinger::EffectChain::setMode_l(uint32_t mode)
6263{
6264    size_t size = mEffects.size();
6265    for (size_t i = 0; i < size; i++) {
6266        mEffects[i]->setMode(mode);
6267    }
6268}
6269
6270// setVolume_l() must be called with PlaybackThread::mLock held
6271bool AudioFlinger::EffectChain::setVolume_l(uint32_t *left, uint32_t *right)
6272{
6273    uint32_t newLeft = *left;
6274    uint32_t newRight = *right;
6275    bool hasControl = false;
6276    int ctrlIdx = -1;
6277    size_t size = mEffects.size();
6278
6279    // first update volume controller
6280    for (size_t i = size; i > 0; i--) {
6281        if (mEffects[i - 1]->isProcessEnabled() &&
6282            (mEffects[i - 1]->desc().flags & EFFECT_FLAG_VOLUME_MASK) == EFFECT_FLAG_VOLUME_CTRL) {
6283            ctrlIdx = i - 1;
6284            hasControl = true;
6285            break;
6286        }
6287    }
6288
6289    if (ctrlIdx == mVolumeCtrlIdx && *left == mLeftVolume && *right == mRightVolume) {
6290        if (hasControl) {
6291            *left = mNewLeftVolume;
6292            *right = mNewRightVolume;
6293        }
6294        return hasControl;
6295    }
6296
6297    mVolumeCtrlIdx = ctrlIdx;
6298    mLeftVolume = newLeft;
6299    mRightVolume = newRight;
6300
6301    // second get volume update from volume controller
6302    if (ctrlIdx >= 0) {
6303        mEffects[ctrlIdx]->setVolume(&newLeft, &newRight, true);
6304        mNewLeftVolume = newLeft;
6305        mNewRightVolume = newRight;
6306    }
6307    // then indicate volume to all other effects in chain.
6308    // Pass altered volume to effects before volume controller
6309    // and requested volume to effects after controller
6310    uint32_t lVol = newLeft;
6311    uint32_t rVol = newRight;
6312
6313    for (size_t i = 0; i < size; i++) {
6314        if ((int)i == ctrlIdx) continue;
6315        // this also works for ctrlIdx == -1 when there is no volume controller
6316        if ((int)i > ctrlIdx) {
6317            lVol = *left;
6318            rVol = *right;
6319        }
6320        mEffects[i]->setVolume(&lVol, &rVol, false);
6321    }
6322    *left = newLeft;
6323    *right = newRight;
6324
6325    return hasControl;
6326}
6327
6328status_t AudioFlinger::EffectChain::dump(int fd, const Vector<String16>& args)
6329{
6330    const size_t SIZE = 256;
6331    char buffer[SIZE];
6332    String8 result;
6333
6334    snprintf(buffer, SIZE, "Effects for session %d:\n", mSessionId);
6335    result.append(buffer);
6336
6337    bool locked = tryLock(mLock);
6338    // failed to lock - AudioFlinger is probably deadlocked
6339    if (!locked) {
6340        result.append("\tCould not lock mutex:\n");
6341    }
6342
6343    result.append("\tNum fx In buffer   Out buffer   Active tracks:\n");
6344    snprintf(buffer, SIZE, "\t%02d     0x%08x  0x%08x   %d\n",
6345            mEffects.size(),
6346            (uint32_t)mInBuffer,
6347            (uint32_t)mOutBuffer,
6348            mActiveTrackCnt);
6349    result.append(buffer);
6350    write(fd, result.string(), result.size());
6351
6352    for (size_t i = 0; i < mEffects.size(); ++i) {
6353        sp<EffectModule> effect = mEffects[i];
6354        if (effect != 0) {
6355            effect->dump(fd, args);
6356        }
6357    }
6358
6359    if (locked) {
6360        mLock.unlock();
6361    }
6362
6363    return NO_ERROR;
6364}
6365
6366#undef LOG_TAG
6367#define LOG_TAG "AudioFlinger"
6368
6369// ----------------------------------------------------------------------------
6370
6371status_t AudioFlinger::onTransact(
6372        uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
6373{
6374    return BnAudioFlinger::onTransact(code, data, reply, flags);
6375}
6376
6377}; // namespace android
6378