AudioFlinger.cpp revision 243f5f91755c01614a8cafe90b0806396e22d553 
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/IServiceManager.h>
28#include <utils/Log.h>
29#include <binder/Parcel.h>
30#include <binder/IPCThreadState.h>
31#include <utils/String16.h>
32#include <utils/threads.h>
33
34#include <cutils/properties.h>
35
36#include <media/AudioTrack.h>
37#include <media/AudioRecord.h>
38
39#include <private/media/AudioTrackShared.h>
40#include <private/media/AudioEffectShared.h>
41#include <hardware_legacy/AudioHardwareInterface.h>
42
43#include "AudioMixer.h"
44#include "AudioFlinger.h"
45
46#ifdef WITH_A2DP
47#include "A2dpAudioInterface.h"
48#endif
49
50#include <media/EffectsFactoryApi.h>
51#include <media/EffectVisualizerApi.h>
52
53// ----------------------------------------------------------------------------
54// the sim build doesn't have gettid
55
56#ifndef HAVE_GETTID
57# define gettid getpid
58#endif
59
60// ----------------------------------------------------------------------------
61
62extern const char * const gEffectLibPath;
63
64namespace android {
65
66static const char* kDeadlockedString = "AudioFlinger may be deadlocked\n";
67static const char* kHardwareLockedString = "Hardware lock is taken\n";
68
69//static const nsecs_t kStandbyTimeInNsecs = seconds(3);
70static const float MAX_GAIN = 4096.0f;
71static const float MAX_GAIN_INT = 0x1000;
72
73// retry counts for buffer fill timeout
74// 50 * ~20msecs = 1 second
75static const int8_t kMaxTrackRetries = 50;
76static const int8_t kMaxTrackStartupRetries = 50;
77// allow less retry attempts on direct output thread.
78// direct outputs can be a scarce resource in audio hardware and should
79// be released as quickly as possible.
80static const int8_t kMaxTrackRetriesDirect = 2;
81
82static const int kDumpLockRetries = 50;
83static const int kDumpLockSleep = 20000;
84
85static const nsecs_t kWarningThrottle = seconds(5);
86
87
88#define AUDIOFLINGER_SECURITY_ENABLED 1
89
90// ----------------------------------------------------------------------------
91
92static bool recordingAllowed() {
93#ifndef HAVE_ANDROID_OS
94    return true;
95#endif
96#if AUDIOFLINGER_SECURITY_ENABLED
97    if (getpid() == IPCThreadState::self()->getCallingPid()) return true;
98    bool ok = checkCallingPermission(String16("android.permission.RECORD_AUDIO"));
99    if (!ok) LOGE("Request requires android.permission.RECORD_AUDIO");
100    return ok;
101#else
102    if (!checkCallingPermission(String16("android.permission.RECORD_AUDIO")))
103        LOGW("WARNING: Need to add android.permission.RECORD_AUDIO to manifest");
104    return true;
105#endif
106}
107
108static bool settingsAllowed() {
109#ifndef HAVE_ANDROID_OS
110    return true;
111#endif
112#if AUDIOFLINGER_SECURITY_ENABLED
113    if (getpid() == IPCThreadState::self()->getCallingPid()) return true;
114    bool ok = checkCallingPermission(String16("android.permission.MODIFY_AUDIO_SETTINGS"));
115    if (!ok) LOGE("Request requires android.permission.MODIFY_AUDIO_SETTINGS");
116    return ok;
117#else
118    if (!checkCallingPermission(String16("android.permission.MODIFY_AUDIO_SETTINGS")))
119        LOGW("WARNING: Need to add android.permission.MODIFY_AUDIO_SETTINGS to manifest");
120    return true;
121#endif
122}
123
124// ----------------------------------------------------------------------------
125
126AudioFlinger::AudioFlinger()
127    : BnAudioFlinger(),
128        mAudioHardware(0), mMasterVolume(1.0f), mMasterMute(false), mNextUniqueId(1)
129{
130    Mutex::Autolock _l(mLock);
131
132    mHardwareStatus = AUDIO_HW_IDLE;
133
134    mAudioHardware = AudioHardwareInterface::create();
135
136    mHardwareStatus = AUDIO_HW_INIT;
137    if (mAudioHardware->initCheck() == NO_ERROR) {
138        AutoMutex lock(mHardwareLock);
139        mMode = AudioSystem::MODE_NORMAL;
140        mHardwareStatus = AUDIO_HW_SET_MODE;
141        mAudioHardware->setMode(mMode);
142        mHardwareStatus = AUDIO_HW_SET_MASTER_VOLUME;
143        mAudioHardware->setMasterVolume(1.0f);
144        mHardwareStatus = AUDIO_HW_IDLE;
145    } else {
146        LOGE("Couldn't even initialize the stubbed audio hardware!");
147    }
148}
149
150AudioFlinger::~AudioFlinger()
151{
152    while (!mRecordThreads.isEmpty()) {
153        // closeInput() will remove first entry from mRecordThreads
154        closeInput(mRecordThreads.keyAt(0));
155    }
156    while (!mPlaybackThreads.isEmpty()) {
157        // closeOutput() will remove first entry from mPlaybackThreads
158        closeOutput(mPlaybackThreads.keyAt(0));
159    }
160    if (mAudioHardware) {
161        delete mAudioHardware;
162    }
163}
164
165
166
167status_t AudioFlinger::dumpClients(int fd, const Vector<String16>& args)
168{
169    const size_t SIZE = 256;
170    char buffer[SIZE];
171    String8 result;
172
173    result.append("Clients:\n");
174    for (size_t i = 0; i < mClients.size(); ++i) {
175        wp<Client> wClient = mClients.valueAt(i);
176        if (wClient != 0) {
177            sp<Client> client = wClient.promote();
178            if (client != 0) {
179                snprintf(buffer, SIZE, "  pid: %d\n", client->pid());
180                result.append(buffer);
181            }
182        }
183    }
184    write(fd, result.string(), result.size());
185    return NO_ERROR;
186}
187
188
189status_t AudioFlinger::dumpInternals(int fd, const Vector<String16>& args)
190{
191    const size_t SIZE = 256;
192    char buffer[SIZE];
193    String8 result;
194    int hardwareStatus = mHardwareStatus;
195
196    snprintf(buffer, SIZE, "Hardware status: %d\n", hardwareStatus);
197    result.append(buffer);
198    write(fd, result.string(), result.size());
199    return NO_ERROR;
200}
201
202status_t AudioFlinger::dumpPermissionDenial(int fd, const Vector<String16>& args)
203{
204    const size_t SIZE = 256;
205    char buffer[SIZE];
206    String8 result;
207    snprintf(buffer, SIZE, "Permission Denial: "
208            "can't dump AudioFlinger from pid=%d, uid=%d\n",
209            IPCThreadState::self()->getCallingPid(),
210            IPCThreadState::self()->getCallingUid());
211    result.append(buffer);
212    write(fd, result.string(), result.size());
213    return NO_ERROR;
214}
215
216static bool tryLock(Mutex& mutex)
217{
218    bool locked = false;
219    for (int i = 0; i < kDumpLockRetries; ++i) {
220        if (mutex.tryLock() == NO_ERROR) {
221            locked = true;
222            break;
223        }
224        usleep(kDumpLockSleep);
225    }
226    return locked;
227}
228
229status_t AudioFlinger::dump(int fd, const Vector<String16>& args)
230{
231    if (checkCallingPermission(String16("android.permission.DUMP")) == false) {
232        dumpPermissionDenial(fd, args);
233    } else {
234        // get state of hardware lock
235        bool hardwareLocked = tryLock(mHardwareLock);
236        if (!hardwareLocked) {
237            String8 result(kHardwareLockedString);
238            write(fd, result.string(), result.size());
239        } else {
240            mHardwareLock.unlock();
241        }
242
243        bool locked = tryLock(mLock);
244
245        // failed to lock - AudioFlinger is probably deadlocked
246        if (!locked) {
247            String8 result(kDeadlockedString);
248            write(fd, result.string(), result.size());
249        }
250
251        dumpClients(fd, args);
252        dumpInternals(fd, args);
253
254        // dump playback threads
255        for (size_t i = 0; i < mPlaybackThreads.size(); i++) {
256            mPlaybackThreads.valueAt(i)->dump(fd, args);
257        }
258
259        // dump record threads
260        for (size_t i = 0; i < mRecordThreads.size(); i++) {
261            mRecordThreads.valueAt(i)->dump(fd, args);
262        }
263
264        if (mAudioHardware) {
265            mAudioHardware->dumpState(fd, args);
266        }
267        if (locked) mLock.unlock();
268    }
269    return NO_ERROR;
270}
271
272
273// IAudioFlinger interface
274
275
276sp<IAudioTrack> AudioFlinger::createTrack(
277        pid_t pid,
278        int streamType,
279        uint32_t sampleRate,
280        int format,
281        int channelCount,
282        int frameCount,
283        uint32_t flags,
284        const sp<IMemory>& sharedBuffer,
285        int output,
286        int *sessionId,
287        status_t *status)
288{
289    sp<PlaybackThread::Track> track;
290    sp<TrackHandle> trackHandle;
291    sp<Client> client;
292    wp<Client> wclient;
293    status_t lStatus;
294    int lSessionId;
295
296    if (streamType >= AudioSystem::NUM_STREAM_TYPES) {
297        LOGE("invalid stream type");
298        lStatus = BAD_VALUE;
299        goto Exit;
300    }
301
302    {
303        Mutex::Autolock _l(mLock);
304        PlaybackThread *thread = checkPlaybackThread_l(output);
305        PlaybackThread *effectThread = NULL;
306        if (thread == NULL) {
307            LOGE("unknown output thread");
308            lStatus = BAD_VALUE;
309            goto Exit;
310        }
311
312        wclient = mClients.valueFor(pid);
313
314        if (wclient != NULL) {
315            client = wclient.promote();
316        } else {
317            client = new Client(this, pid);
318            mClients.add(pid, client);
319        }
320
321        LOGV("createTrack() sessionId: %d", (sessionId == NULL) ? -2 : *sessionId);
322        if (sessionId != NULL && *sessionId != AudioSystem::SESSION_OUTPUT_MIX) {
323            for (size_t i = 0; i < mPlaybackThreads.size(); i++) {
324                sp<PlaybackThread> t = mPlaybackThreads.valueAt(i);
325                if (mPlaybackThreads.keyAt(i) != output) {
326                    // prevent same audio session on different output threads
327                    uint32_t sessions = t->hasAudioSession(*sessionId);
328                    if (sessions & PlaybackThread::TRACK_SESSION) {
329                        lStatus = BAD_VALUE;
330                        goto Exit;
331                    }
332                    // check if an effect with same session ID is waiting for a track to be created
333                    if (sessions & PlaybackThread::EFFECT_SESSION) {
334                        effectThread = t.get();
335                    }
336                }
337            }
338            lSessionId = *sessionId;
339        } else {
340            // if no audio session id is provided, create one here
341            lSessionId = nextUniqueId_l();
342            if (sessionId != NULL) {
343                *sessionId = lSessionId;
344            }
345        }
346        LOGV("createTrack() lSessionId: %d", lSessionId);
347
348        track = thread->createTrack_l(client, streamType, sampleRate, format,
349                channelCount, frameCount, sharedBuffer, lSessionId, &lStatus);
350
351        // move effect chain to this output thread if an effect on same session was waiting
352        // for a track to be created
353        if (lStatus == NO_ERROR && effectThread != NULL) {
354            Mutex::Autolock _dl(thread->mLock);
355            Mutex::Autolock _sl(effectThread->mLock);
356            moveEffectChain_l(lSessionId, effectThread, thread, true);
357        }
358    }
359    if (lStatus == NO_ERROR) {
360        trackHandle = new TrackHandle(track);
361    } else {
362        // remove local strong reference to Client before deleting the Track so that the Client
363        // destructor is called by the TrackBase destructor with mLock held
364        client.clear();
365        track.clear();
366    }
367
368Exit:
369    if(status) {
370        *status = lStatus;
371    }
372    return trackHandle;
373}
374
375uint32_t AudioFlinger::sampleRate(int output) const
376{
377    Mutex::Autolock _l(mLock);
378    PlaybackThread *thread = checkPlaybackThread_l(output);
379    if (thread == NULL) {
380        LOGW("sampleRate() unknown thread %d", output);
381        return 0;
382    }
383    return thread->sampleRate();
384}
385
386int AudioFlinger::channelCount(int output) const
387{
388    Mutex::Autolock _l(mLock);
389    PlaybackThread *thread = checkPlaybackThread_l(output);
390    if (thread == NULL) {
391        LOGW("channelCount() unknown thread %d", output);
392        return 0;
393    }
394    return thread->channelCount();
395}
396
397int AudioFlinger::format(int output) const
398{
399    Mutex::Autolock _l(mLock);
400    PlaybackThread *thread = checkPlaybackThread_l(output);
401    if (thread == NULL) {
402        LOGW("format() unknown thread %d", output);
403        return 0;
404    }
405    return thread->format();
406}
407
408size_t AudioFlinger::frameCount(int output) const
409{
410    Mutex::Autolock _l(mLock);
411    PlaybackThread *thread = checkPlaybackThread_l(output);
412    if (thread == NULL) {
413        LOGW("frameCount() unknown thread %d", output);
414        return 0;
415    }
416    return thread->frameCount();
417}
418
419uint32_t AudioFlinger::latency(int output) const
420{
421    Mutex::Autolock _l(mLock);
422    PlaybackThread *thread = checkPlaybackThread_l(output);
423    if (thread == NULL) {
424        LOGW("latency() unknown thread %d", output);
425        return 0;
426    }
427    return thread->latency();
428}
429
430status_t AudioFlinger::setMasterVolume(float value)
431{
432    // check calling permissions
433    if (!settingsAllowed()) {
434        return PERMISSION_DENIED;
435    }
436
437    // when hw supports master volume, don't scale in sw mixer
438    { // scope for the lock
439        AutoMutex lock(mHardwareLock);
440        mHardwareStatus = AUDIO_HW_SET_MASTER_VOLUME;
441        if (mAudioHardware->setMasterVolume(value) == NO_ERROR) {
442            value = 1.0f;
443        }
444        mHardwareStatus = AUDIO_HW_IDLE;
445    }
446
447    Mutex::Autolock _l(mLock);
448    mMasterVolume = value;
449    for (uint32_t i = 0; i < mPlaybackThreads.size(); i++)
450       mPlaybackThreads.valueAt(i)->setMasterVolume(value);
451
452    return NO_ERROR;
453}
454
455status_t AudioFlinger::setMode(int mode)
456{
457    status_t ret;
458
459    // check calling permissions
460    if (!settingsAllowed()) {
461        return PERMISSION_DENIED;
462    }
463    if ((mode < 0) || (mode >= AudioSystem::NUM_MODES)) {
464        LOGW("Illegal value: setMode(%d)", mode);
465        return BAD_VALUE;
466    }
467
468    { // scope for the lock
469        AutoMutex lock(mHardwareLock);
470        mHardwareStatus = AUDIO_HW_SET_MODE;
471        ret = mAudioHardware->setMode(mode);
472        mHardwareStatus = AUDIO_HW_IDLE;
473    }
474
475    if (NO_ERROR == ret) {
476        Mutex::Autolock _l(mLock);
477        mMode = mode;
478        for (uint32_t i = 0; i < mPlaybackThreads.size(); i++)
479           mPlaybackThreads.valueAt(i)->setMode(mode);
480    }
481
482    return ret;
483}
484
485status_t AudioFlinger::setMicMute(bool state)
486{
487    // check calling permissions
488    if (!settingsAllowed()) {
489        return PERMISSION_DENIED;
490    }
491
492    AutoMutex lock(mHardwareLock);
493    mHardwareStatus = AUDIO_HW_SET_MIC_MUTE;
494    status_t ret = mAudioHardware->setMicMute(state);
495    mHardwareStatus = AUDIO_HW_IDLE;
496    return ret;
497}
498
499bool AudioFlinger::getMicMute() const
500{
501    bool state = AudioSystem::MODE_INVALID;
502    mHardwareStatus = AUDIO_HW_GET_MIC_MUTE;
503    mAudioHardware->getMicMute(&state);
504    mHardwareStatus = AUDIO_HW_IDLE;
505    return state;
506}
507
508status_t AudioFlinger::setMasterMute(bool muted)
509{
510    // check calling permissions
511    if (!settingsAllowed()) {
512        return PERMISSION_DENIED;
513    }
514
515    Mutex::Autolock _l(mLock);
516    mMasterMute = muted;
517    for (uint32_t i = 0; i < mPlaybackThreads.size(); i++)
518       mPlaybackThreads.valueAt(i)->setMasterMute(muted);
519
520    return NO_ERROR;
521}
522
523float AudioFlinger::masterVolume() const
524{
525    return mMasterVolume;
526}
527
528bool AudioFlinger::masterMute() const
529{
530    return mMasterMute;
531}
532
533status_t AudioFlinger::setStreamVolume(int stream, float value, int output)
534{
535    // check calling permissions
536    if (!settingsAllowed()) {
537        return PERMISSION_DENIED;
538    }
539
540    if (stream < 0 || uint32_t(stream) >= AudioSystem::NUM_STREAM_TYPES) {
541        return BAD_VALUE;
542    }
543
544    AutoMutex lock(mLock);
545    PlaybackThread *thread = NULL;
546    if (output) {
547        thread = checkPlaybackThread_l(output);
548        if (thread == NULL) {
549            return BAD_VALUE;
550        }
551    }
552
553    mStreamTypes[stream].volume = value;
554
555    if (thread == NULL) {
556        for (uint32_t i = 0; i < mPlaybackThreads.size(); i++) {
557           mPlaybackThreads.valueAt(i)->setStreamVolume(stream, value);
558        }
559    } else {
560        thread->setStreamVolume(stream, value);
561    }
562
563    return NO_ERROR;
564}
565
566status_t AudioFlinger::setStreamMute(int stream, bool muted)
567{
568    // check calling permissions
569    if (!settingsAllowed()) {
570        return PERMISSION_DENIED;
571    }
572
573    if (stream < 0 || uint32_t(stream) >= AudioSystem::NUM_STREAM_TYPES ||
574        uint32_t(stream) == AudioSystem::ENFORCED_AUDIBLE) {
575        return BAD_VALUE;
576    }
577
578    AutoMutex lock(mLock);
579    mStreamTypes[stream].mute = muted;
580    for (uint32_t i = 0; i < mPlaybackThreads.size(); i++)
581       mPlaybackThreads.valueAt(i)->setStreamMute(stream, muted);
582
583    return NO_ERROR;
584}
585
586float AudioFlinger::streamVolume(int stream, int output) const
587{
588    if (stream < 0 || uint32_t(stream) >= AudioSystem::NUM_STREAM_TYPES) {
589        return 0.0f;
590    }
591
592    AutoMutex lock(mLock);
593    float volume;
594    if (output) {
595        PlaybackThread *thread = checkPlaybackThread_l(output);
596        if (thread == NULL) {
597            return 0.0f;
598        }
599        volume = thread->streamVolume(stream);
600    } else {
601        volume = mStreamTypes[stream].volume;
602    }
603
604    return volume;
605}
606
607bool AudioFlinger::streamMute(int stream) const
608{
609    if (stream < 0 || stream >= (int)AudioSystem::NUM_STREAM_TYPES) {
610        return true;
611    }
612
613    return mStreamTypes[stream].mute;
614}
615
616status_t AudioFlinger::setParameters(int ioHandle, const String8& keyValuePairs)
617{
618    status_t result;
619
620    LOGV("setParameters(): io %d, keyvalue %s, tid %d, calling tid %d",
621            ioHandle, keyValuePairs.string(), gettid(), IPCThreadState::self()->getCallingPid());
622    // check calling permissions
623    if (!settingsAllowed()) {
624        return PERMISSION_DENIED;
625    }
626
627    // ioHandle == 0 means the parameters are global to the audio hardware interface
628    if (ioHandle == 0) {
629        AutoMutex lock(mHardwareLock);
630        mHardwareStatus = AUDIO_SET_PARAMETER;
631        result = mAudioHardware->setParameters(keyValuePairs);
632        mHardwareStatus = AUDIO_HW_IDLE;
633        return result;
634    }
635
636    // hold a strong ref on thread in case closeOutput() or closeInput() is called
637    // and the thread is exited once the lock is released
638    sp<ThreadBase> thread;
639    {
640        Mutex::Autolock _l(mLock);
641        thread = checkPlaybackThread_l(ioHandle);
642        if (thread == NULL) {
643            thread = checkRecordThread_l(ioHandle);
644        }
645    }
646    if (thread != NULL) {
647        result = thread->setParameters(keyValuePairs);
648        return result;
649    }
650    return BAD_VALUE;
651}
652
653String8 AudioFlinger::getParameters(int ioHandle, const String8& keys)
654{
655//    LOGV("getParameters() io %d, keys %s, tid %d, calling tid %d",
656//            ioHandle, keys.string(), gettid(), IPCThreadState::self()->getCallingPid());
657
658    if (ioHandle == 0) {
659        return mAudioHardware->getParameters(keys);
660    }
661
662    Mutex::Autolock _l(mLock);
663
664    PlaybackThread *playbackThread = checkPlaybackThread_l(ioHandle);
665    if (playbackThread != NULL) {
666        return playbackThread->getParameters(keys);
667    }
668    RecordThread *recordThread = checkRecordThread_l(ioHandle);
669    if (recordThread != NULL) {
670        return recordThread->getParameters(keys);
671    }
672    return String8("");
673}
674
675size_t AudioFlinger::getInputBufferSize(uint32_t sampleRate, int format, int channelCount)
676{
677    return mAudioHardware->getInputBufferSize(sampleRate, format, channelCount);
678}
679
680unsigned int AudioFlinger::getInputFramesLost(int ioHandle)
681{
682    if (ioHandle == 0) {
683        return 0;
684    }
685
686    Mutex::Autolock _l(mLock);
687
688    RecordThread *recordThread = checkRecordThread_l(ioHandle);
689    if (recordThread != NULL) {
690        return recordThread->getInputFramesLost();
691    }
692    return 0;
693}
694
695status_t AudioFlinger::setVoiceVolume(float value)
696{
697    // check calling permissions
698    if (!settingsAllowed()) {
699        return PERMISSION_DENIED;
700    }
701
702    AutoMutex lock(mHardwareLock);
703    mHardwareStatus = AUDIO_SET_VOICE_VOLUME;
704    status_t ret = mAudioHardware->setVoiceVolume(value);
705    mHardwareStatus = AUDIO_HW_IDLE;
706
707    return ret;
708}
709
710status_t AudioFlinger::getRenderPosition(uint32_t *halFrames, uint32_t *dspFrames, int output)
711{
712    status_t status;
713
714    Mutex::Autolock _l(mLock);
715
716    PlaybackThread *playbackThread = checkPlaybackThread_l(output);
717    if (playbackThread != NULL) {
718        return playbackThread->getRenderPosition(halFrames, dspFrames);
719    }
720
721    return BAD_VALUE;
722}
723
724void AudioFlinger::registerClient(const sp<IAudioFlingerClient>& client)
725{
726
727    Mutex::Autolock _l(mLock);
728
729    int pid = IPCThreadState::self()->getCallingPid();
730    if (mNotificationClients.indexOfKey(pid) < 0) {
731        sp<NotificationClient> notificationClient = new NotificationClient(this,
732                                                                            client,
733                                                                            pid);
734        LOGV("registerClient() client %p, pid %d", notificationClient.get(), pid);
735
736        mNotificationClients.add(pid, notificationClient);
737
738        sp<IBinder> binder = client->asBinder();
739        binder->linkToDeath(notificationClient);
740
741        // the config change is always sent from playback or record threads to avoid deadlock
742        // with AudioSystem::gLock
743        for (size_t i = 0; i < mPlaybackThreads.size(); i++) {
744            mPlaybackThreads.valueAt(i)->sendConfigEvent(AudioSystem::OUTPUT_OPENED);
745        }
746
747        for (size_t i = 0; i < mRecordThreads.size(); i++) {
748            mRecordThreads.valueAt(i)->sendConfigEvent(AudioSystem::INPUT_OPENED);
749        }
750    }
751}
752
753void AudioFlinger::removeNotificationClient(pid_t pid)
754{
755    Mutex::Autolock _l(mLock);
756
757    int index = mNotificationClients.indexOfKey(pid);
758    if (index >= 0) {
759        sp <NotificationClient> client = mNotificationClients.valueFor(pid);
760        LOGV("removeNotificationClient() %p, pid %d", client.get(), pid);
761        mNotificationClients.removeItem(pid);
762    }
763}
764
765// audioConfigChanged_l() must be called with AudioFlinger::mLock held
766void AudioFlinger::audioConfigChanged_l(int event, int ioHandle, void *param2)
767{
768    size_t size = mNotificationClients.size();
769    for (size_t i = 0; i < size; i++) {
770        mNotificationClients.valueAt(i)->client()->ioConfigChanged(event, ioHandle, param2);
771    }
772}
773
774// removeClient_l() must be called with AudioFlinger::mLock held
775void AudioFlinger::removeClient_l(pid_t pid)
776{
777    LOGV("removeClient_l() pid %d, tid %d, calling tid %d", pid, gettid(), IPCThreadState::self()->getCallingPid());
778    mClients.removeItem(pid);
779}
780
781
782// ----------------------------------------------------------------------------
783
784AudioFlinger::ThreadBase::ThreadBase(const sp<AudioFlinger>& audioFlinger, int id)
785    :   Thread(false),
786        mAudioFlinger(audioFlinger), mSampleRate(0), mFrameCount(0), mChannelCount(0),
787        mFrameSize(1), mFormat(0), mStandby(false), mId(id), mExiting(false)
788{
789}
790
791AudioFlinger::ThreadBase::~ThreadBase()
792{
793    mParamCond.broadcast();
794    mNewParameters.clear();
795}
796
797void AudioFlinger::ThreadBase::exit()
798{
799    // keep a strong ref on ourself so that we wont get
800    // destroyed in the middle of requestExitAndWait()
801    sp <ThreadBase> strongMe = this;
802
803    LOGV("ThreadBase::exit");
804    {
805        AutoMutex lock(&mLock);
806        mExiting = true;
807        requestExit();
808        mWaitWorkCV.signal();
809    }
810    requestExitAndWait();
811}
812
813uint32_t AudioFlinger::ThreadBase::sampleRate() const
814{
815    return mSampleRate;
816}
817
818int AudioFlinger::ThreadBase::channelCount() const
819{
820    return (int)mChannelCount;
821}
822
823int AudioFlinger::ThreadBase::format() const
824{
825    return mFormat;
826}
827
828size_t AudioFlinger::ThreadBase::frameCount() const
829{
830    return mFrameCount;
831}
832
833status_t AudioFlinger::ThreadBase::setParameters(const String8& keyValuePairs)
834{
835    status_t status;
836
837    LOGV("ThreadBase::setParameters() %s", keyValuePairs.string());
838    Mutex::Autolock _l(mLock);
839
840    mNewParameters.add(keyValuePairs);
841    mWaitWorkCV.signal();
842    // wait condition with timeout in case the thread loop has exited
843    // before the request could be processed
844    if (mParamCond.waitRelative(mLock, seconds(2)) == NO_ERROR) {
845        status = mParamStatus;
846        mWaitWorkCV.signal();
847    } else {
848        status = TIMED_OUT;
849    }
850    return status;
851}
852
853void AudioFlinger::ThreadBase::sendConfigEvent(int event, int param)
854{
855    Mutex::Autolock _l(mLock);
856    sendConfigEvent_l(event, param);
857}
858
859// sendConfigEvent_l() must be called with ThreadBase::mLock held
860void AudioFlinger::ThreadBase::sendConfigEvent_l(int event, int param)
861{
862    ConfigEvent *configEvent = new ConfigEvent();
863    configEvent->mEvent = event;
864    configEvent->mParam = param;
865    mConfigEvents.add(configEvent);
866    LOGV("sendConfigEvent() num events %d event %d, param %d", mConfigEvents.size(), event, param);
867    mWaitWorkCV.signal();
868}
869
870void AudioFlinger::ThreadBase::processConfigEvents()
871{
872    mLock.lock();
873    while(!mConfigEvents.isEmpty()) {
874        LOGV("processConfigEvents() remaining events %d", mConfigEvents.size());
875        ConfigEvent *configEvent = mConfigEvents[0];
876        mConfigEvents.removeAt(0);
877        // release mLock before locking AudioFlinger mLock: lock order is always
878        // AudioFlinger then ThreadBase to avoid cross deadlock
879        mLock.unlock();
880        mAudioFlinger->mLock.lock();
881        audioConfigChanged_l(configEvent->mEvent, configEvent->mParam);
882        mAudioFlinger->mLock.unlock();
883        delete configEvent;
884        mLock.lock();
885    }
886    mLock.unlock();
887}
888
889status_t AudioFlinger::ThreadBase::dumpBase(int fd, const Vector<String16>& args)
890{
891    const size_t SIZE = 256;
892    char buffer[SIZE];
893    String8 result;
894
895    bool locked = tryLock(mLock);
896    if (!locked) {
897        snprintf(buffer, SIZE, "thread %p maybe dead locked\n", this);
898        write(fd, buffer, strlen(buffer));
899    }
900
901    snprintf(buffer, SIZE, "standby: %d\n", mStandby);
902    result.append(buffer);
903    snprintf(buffer, SIZE, "Sample rate: %d\n", mSampleRate);
904    result.append(buffer);
905    snprintf(buffer, SIZE, "Frame count: %d\n", mFrameCount);
906    result.append(buffer);
907    snprintf(buffer, SIZE, "Channel Count: %d\n", mChannelCount);
908    result.append(buffer);
909    snprintf(buffer, SIZE, "Format: %d\n", mFormat);
910    result.append(buffer);
911    snprintf(buffer, SIZE, "Frame size: %d\n", mFrameSize);
912    result.append(buffer);
913
914    snprintf(buffer, SIZE, "\nPending setParameters commands: \n");
915    result.append(buffer);
916    result.append(" Index Command");
917    for (size_t i = 0; i < mNewParameters.size(); ++i) {
918        snprintf(buffer, SIZE, "\n %02d    ", i);
919        result.append(buffer);
920        result.append(mNewParameters[i]);
921    }
922
923    snprintf(buffer, SIZE, "\n\nPending config events: \n");
924    result.append(buffer);
925    snprintf(buffer, SIZE, " Index event param\n");
926    result.append(buffer);
927    for (size_t i = 0; i < mConfigEvents.size(); i++) {
928        snprintf(buffer, SIZE, " %02d    %02d    %d\n", i, mConfigEvents[i]->mEvent, mConfigEvents[i]->mParam);
929        result.append(buffer);
930    }
931    result.append("\n");
932
933    write(fd, result.string(), result.size());
934
935    if (locked) {
936        mLock.unlock();
937    }
938    return NO_ERROR;
939}
940
941
942// ----------------------------------------------------------------------------
943
944AudioFlinger::PlaybackThread::PlaybackThread(const sp<AudioFlinger>& audioFlinger, AudioStreamOut* output, int id, uint32_t device)
945    :   ThreadBase(audioFlinger, id),
946        mMixBuffer(0), mSuspended(0), mBytesWritten(0), mOutput(output),
947        mLastWriteTime(0), mNumWrites(0), mNumDelayedWrites(0), mInWrite(false),
948        mDevice(device)
949{
950    readOutputParameters();
951
952    mMasterVolume = mAudioFlinger->masterVolume();
953    mMasterMute = mAudioFlinger->masterMute();
954
955    for (int stream = 0; stream < AudioSystem::NUM_STREAM_TYPES; stream++) {
956        mStreamTypes[stream].volume = mAudioFlinger->streamVolumeInternal(stream);
957        mStreamTypes[stream].mute = mAudioFlinger->streamMute(stream);
958    }
959}
960
961AudioFlinger::PlaybackThread::~PlaybackThread()
962{
963    delete [] mMixBuffer;
964}
965
966status_t AudioFlinger::PlaybackThread::dump(int fd, const Vector<String16>& args)
967{
968    dumpInternals(fd, args);
969    dumpTracks(fd, args);
970    dumpEffectChains(fd, args);
971    return NO_ERROR;
972}
973
974status_t AudioFlinger::PlaybackThread::dumpTracks(int fd, const Vector<String16>& args)
975{
976    const size_t SIZE = 256;
977    char buffer[SIZE];
978    String8 result;
979
980    snprintf(buffer, SIZE, "Output thread %p tracks\n", this);
981    result.append(buffer);
982    result.append("   Name  Clien Typ Fmt Chn Session Buf  S M F SRate LeftV RighV  Serv       User       Main buf   Aux Buf\n");
983    for (size_t i = 0; i < mTracks.size(); ++i) {
984        sp<Track> track = mTracks[i];
985        if (track != 0) {
986            track->dump(buffer, SIZE);
987            result.append(buffer);
988        }
989    }
990
991    snprintf(buffer, SIZE, "Output thread %p active tracks\n", this);
992    result.append(buffer);
993    result.append("   Name  Clien Typ Fmt Chn Session Buf  S M F SRate LeftV RighV  Serv       User       Main buf   Aux Buf\n");
994    for (size_t i = 0; i < mActiveTracks.size(); ++i) {
995        wp<Track> wTrack = mActiveTracks[i];
996        if (wTrack != 0) {
997            sp<Track> track = wTrack.promote();
998            if (track != 0) {
999                track->dump(buffer, SIZE);
1000                result.append(buffer);
1001            }
1002        }
1003    }
1004    write(fd, result.string(), result.size());
1005    return NO_ERROR;
1006}
1007
1008status_t AudioFlinger::PlaybackThread::dumpEffectChains(int fd, const Vector<String16>& args)
1009{
1010    const size_t SIZE = 256;
1011    char buffer[SIZE];
1012    String8 result;
1013
1014    snprintf(buffer, SIZE, "\n- %d Effect Chains:\n", mEffectChains.size());
1015    write(fd, buffer, strlen(buffer));
1016
1017    for (size_t i = 0; i < mEffectChains.size(); ++i) {
1018        sp<EffectChain> chain = mEffectChains[i];
1019        if (chain != 0) {
1020            chain->dump(fd, args);
1021        }
1022    }
1023    return NO_ERROR;
1024}
1025
1026status_t AudioFlinger::PlaybackThread::dumpInternals(int fd, const Vector<String16>& args)
1027{
1028    const size_t SIZE = 256;
1029    char buffer[SIZE];
1030    String8 result;
1031
1032    snprintf(buffer, SIZE, "\nOutput thread %p internals\n", this);
1033    result.append(buffer);
1034    snprintf(buffer, SIZE, "last write occurred (msecs): %llu\n", ns2ms(systemTime() - mLastWriteTime));
1035    result.append(buffer);
1036    snprintf(buffer, SIZE, "total writes: %d\n", mNumWrites);
1037    result.append(buffer);
1038    snprintf(buffer, SIZE, "delayed writes: %d\n", mNumDelayedWrites);
1039    result.append(buffer);
1040    snprintf(buffer, SIZE, "blocked in write: %d\n", mInWrite);
1041    result.append(buffer);
1042    snprintf(buffer, SIZE, "suspend count: %d\n", mSuspended);
1043    result.append(buffer);
1044    snprintf(buffer, SIZE, "mix buffer : %p\n", mMixBuffer);
1045    result.append(buffer);
1046    write(fd, result.string(), result.size());
1047
1048    dumpBase(fd, args);
1049
1050    return NO_ERROR;
1051}
1052
1053// Thread virtuals
1054status_t AudioFlinger::PlaybackThread::readyToRun()
1055{
1056    if (mSampleRate == 0) {
1057        LOGE("No working audio driver found.");
1058        return NO_INIT;
1059    }
1060    LOGI("AudioFlinger's thread %p ready to run", this);
1061    return NO_ERROR;
1062}
1063
1064void AudioFlinger::PlaybackThread::onFirstRef()
1065{
1066    const size_t SIZE = 256;
1067    char buffer[SIZE];
1068
1069    snprintf(buffer, SIZE, "Playback Thread %p", this);
1070
1071    run(buffer, ANDROID_PRIORITY_URGENT_AUDIO);
1072}
1073
1074// PlaybackThread::createTrack_l() must be called with AudioFlinger::mLock held
1075sp<AudioFlinger::PlaybackThread::Track>  AudioFlinger::PlaybackThread::createTrack_l(
1076        const sp<AudioFlinger::Client>& client,
1077        int streamType,
1078        uint32_t sampleRate,
1079        int format,
1080        int channelCount,
1081        int frameCount,
1082        const sp<IMemory>& sharedBuffer,
1083        int sessionId,
1084        status_t *status)
1085{
1086    sp<Track> track;
1087    status_t lStatus;
1088
1089    if (mType == DIRECT) {
1090        if (sampleRate != mSampleRate || format != mFormat || channelCount != (int)mChannelCount) {
1091            LOGE("createTrack_l() Bad parameter:  sampleRate %d format %d, channelCount %d for output %p",
1092                 sampleRate, format, channelCount, mOutput);
1093            lStatus = BAD_VALUE;
1094            goto Exit;
1095        }
1096    } else {
1097        // Resampler implementation limits input sampling rate to 2 x output sampling rate.
1098        if (sampleRate > mSampleRate*2) {
1099            LOGE("Sample rate out of range: %d mSampleRate %d", sampleRate, mSampleRate);
1100            lStatus = BAD_VALUE;
1101            goto Exit;
1102        }
1103    }
1104
1105    if (mOutput == 0) {
1106        LOGE("Audio driver not initialized.");
1107        lStatus = NO_INIT;
1108        goto Exit;
1109    }
1110
1111    { // scope for mLock
1112        Mutex::Autolock _l(mLock);
1113
1114        // all tracks in same audio session must share the same routing strategy otherwise
1115        // conflicts will happen when tracks are moved from one output to another by audio policy
1116        // manager
1117        uint32_t strategy =
1118                AudioSystem::getStrategyForStream((AudioSystem::stream_type)streamType);
1119        for (size_t i = 0; i < mTracks.size(); ++i) {
1120            sp<Track> t = mTracks[i];
1121            if (t != 0) {
1122                if (sessionId == t->sessionId() &&
1123                        strategy != AudioSystem::getStrategyForStream((AudioSystem::stream_type)t->type())) {
1124                    lStatus = BAD_VALUE;
1125                    goto Exit;
1126                }
1127            }
1128        }
1129
1130        track = new Track(this, client, streamType, sampleRate, format,
1131                channelCount, frameCount, sharedBuffer, sessionId);
1132        if (track->getCblk() == NULL || track->name() < 0) {
1133            lStatus = NO_MEMORY;
1134            goto Exit;
1135        }
1136        mTracks.add(track);
1137
1138        sp<EffectChain> chain = getEffectChain_l(sessionId);
1139        if (chain != 0) {
1140            LOGV("createTrack_l() setting main buffer %p", chain->inBuffer());
1141            track->setMainBuffer(chain->inBuffer());
1142            chain->setStrategy(AudioSystem::getStrategyForStream((AudioSystem::stream_type)track->type()));
1143        }
1144    }
1145    lStatus = NO_ERROR;
1146
1147Exit:
1148    if(status) {
1149        *status = lStatus;
1150    }
1151    return track;
1152}
1153
1154uint32_t AudioFlinger::PlaybackThread::latency() const
1155{
1156    if (mOutput) {
1157        return mOutput->latency();
1158    }
1159    else {
1160        return 0;
1161    }
1162}
1163
1164status_t AudioFlinger::PlaybackThread::setMasterVolume(float value)
1165{
1166    mMasterVolume = value;
1167    return NO_ERROR;
1168}
1169
1170status_t AudioFlinger::PlaybackThread::setMasterMute(bool muted)
1171{
1172    mMasterMute = muted;
1173    return NO_ERROR;
1174}
1175
1176float AudioFlinger::PlaybackThread::masterVolume() const
1177{
1178    return mMasterVolume;
1179}
1180
1181bool AudioFlinger::PlaybackThread::masterMute() const
1182{
1183    return mMasterMute;
1184}
1185
1186status_t AudioFlinger::PlaybackThread::setStreamVolume(int stream, float value)
1187{
1188    mStreamTypes[stream].volume = value;
1189    return NO_ERROR;
1190}
1191
1192status_t AudioFlinger::PlaybackThread::setStreamMute(int stream, bool muted)
1193{
1194    mStreamTypes[stream].mute = muted;
1195    return NO_ERROR;
1196}
1197
1198float AudioFlinger::PlaybackThread::streamVolume(int stream) const
1199{
1200    return mStreamTypes[stream].volume;
1201}
1202
1203bool AudioFlinger::PlaybackThread::streamMute(int stream) const
1204{
1205    return mStreamTypes[stream].mute;
1206}
1207
1208// addTrack_l() must be called with ThreadBase::mLock held
1209status_t AudioFlinger::PlaybackThread::addTrack_l(const sp<Track>& track)
1210{
1211    status_t status = ALREADY_EXISTS;
1212
1213    // set retry count for buffer fill
1214    track->mRetryCount = kMaxTrackStartupRetries;
1215    if (mActiveTracks.indexOf(track) < 0) {
1216        // the track is newly added, make sure it fills up all its
1217        // buffers before playing. This is to ensure the client will
1218        // effectively get the latency it requested.
1219        track->mFillingUpStatus = Track::FS_FILLING;
1220        track->mResetDone = false;
1221        mActiveTracks.add(track);
1222        if (track->mainBuffer() != mMixBuffer) {
1223            sp<EffectChain> chain = getEffectChain_l(track->sessionId());
1224            if (chain != 0) {
1225                LOGV("addTrack_l() starting track on chain %p for session %d", chain.get(), track->sessionId());
1226                chain->startTrack();
1227            }
1228        }
1229
1230        status = NO_ERROR;
1231    }
1232
1233    LOGV("mWaitWorkCV.broadcast");
1234    mWaitWorkCV.broadcast();
1235
1236    return status;
1237}
1238
1239// destroyTrack_l() must be called with ThreadBase::mLock held
1240void AudioFlinger::PlaybackThread::destroyTrack_l(const sp<Track>& track)
1241{
1242    track->mState = TrackBase::TERMINATED;
1243    if (mActiveTracks.indexOf(track) < 0) {
1244        mTracks.remove(track);
1245        deleteTrackName_l(track->name());
1246    }
1247}
1248
1249String8 AudioFlinger::PlaybackThread::getParameters(const String8& keys)
1250{
1251    return mOutput->getParameters(keys);
1252}
1253
1254// destroyTrack_l() must be called with AudioFlinger::mLock held
1255void AudioFlinger::PlaybackThread::audioConfigChanged_l(int event, int param) {
1256    AudioSystem::OutputDescriptor desc;
1257    void *param2 = 0;
1258
1259    LOGV("PlaybackThread::audioConfigChanged_l, thread %p, event %d, param %d", this, event, param);
1260
1261    switch (event) {
1262    case AudioSystem::OUTPUT_OPENED:
1263    case AudioSystem::OUTPUT_CONFIG_CHANGED:
1264        desc.channels = mChannels;
1265        desc.samplingRate = mSampleRate;
1266        desc.format = mFormat;
1267        desc.frameCount = mFrameCount;
1268        desc.latency = latency();
1269        param2 = &desc;
1270        break;
1271
1272    case AudioSystem::STREAM_CONFIG_CHANGED:
1273        param2 = &param;
1274    case AudioSystem::OUTPUT_CLOSED:
1275    default:
1276        break;
1277    }
1278    mAudioFlinger->audioConfigChanged_l(event, mId, param2);
1279}
1280
1281void AudioFlinger::PlaybackThread::readOutputParameters()
1282{
1283    mSampleRate = mOutput->sampleRate();
1284    mChannels = mOutput->channels();
1285    mChannelCount = (uint16_t)AudioSystem::popCount(mChannels);
1286    mFormat = mOutput->format();
1287    mFrameSize = (uint16_t)mOutput->frameSize();
1288    mFrameCount = mOutput->bufferSize() / mFrameSize;
1289
1290    // FIXME - Current mixer implementation only supports stereo output: Always
1291    // Allocate a stereo buffer even if HW output is mono.
1292    if (mMixBuffer != NULL) delete[] mMixBuffer;
1293    mMixBuffer = new int16_t[mFrameCount * 2];
1294    memset(mMixBuffer, 0, mFrameCount * 2 * sizeof(int16_t));
1295
1296    // force reconfiguration of effect chains and engines to take new buffer size and audio
1297    // parameters into account
1298    // Note that mLock is not held when readOutputParameters() is called from the constructor
1299    // but in this case nothing is done below as no audio sessions have effect yet so it doesn't
1300    // matter.
1301    // create a copy of mEffectChains as calling moveEffectChain_l() can reorder some effect chains
1302    Vector< sp<EffectChain> > effectChains = mEffectChains;
1303    for (size_t i = 0; i < effectChains.size(); i ++) {
1304        mAudioFlinger->moveEffectChain_l(effectChains[i]->sessionId(), this, this, false);
1305    }
1306}
1307
1308status_t AudioFlinger::PlaybackThread::getRenderPosition(uint32_t *halFrames, uint32_t *dspFrames)
1309{
1310    if (halFrames == 0 || dspFrames == 0) {
1311        return BAD_VALUE;
1312    }
1313    if (mOutput == 0) {
1314        return INVALID_OPERATION;
1315    }
1316    *halFrames = mBytesWritten/mOutput->frameSize();
1317
1318    return mOutput->getRenderPosition(dspFrames);
1319}
1320
1321uint32_t AudioFlinger::PlaybackThread::hasAudioSession(int sessionId)
1322{
1323    Mutex::Autolock _l(mLock);
1324    uint32_t result = 0;
1325    if (getEffectChain_l(sessionId) != 0) {
1326        result = EFFECT_SESSION;
1327    }
1328
1329    for (size_t i = 0; i < mTracks.size(); ++i) {
1330        sp<Track> track = mTracks[i];
1331        if (sessionId == track->sessionId() &&
1332                !(track->mCblk->flags & CBLK_INVALID_MSK)) {
1333            result |= TRACK_SESSION;
1334            break;
1335        }
1336    }
1337
1338    return result;
1339}
1340
1341uint32_t AudioFlinger::PlaybackThread::getStrategyForSession_l(int sessionId)
1342{
1343    // session AudioSystem::SESSION_OUTPUT_MIX is placed in same strategy as MUSIC stream so that
1344    // it is moved to correct output by audio policy manager when A2DP is connected or disconnected
1345    if (sessionId == AudioSystem::SESSION_OUTPUT_MIX) {
1346        return AudioSystem::getStrategyForStream(AudioSystem::MUSIC);
1347    }
1348    for (size_t i = 0; i < mTracks.size(); i++) {
1349        sp<Track> track = mTracks[i];
1350        if (sessionId == track->sessionId() &&
1351                !(track->mCblk->flags & CBLK_INVALID_MSK)) {
1352            return AudioSystem::getStrategyForStream((AudioSystem::stream_type) track->type());
1353        }
1354    }
1355    return AudioSystem::getStrategyForStream(AudioSystem::MUSIC);
1356}
1357
1358sp<AudioFlinger::EffectChain> AudioFlinger::PlaybackThread::getEffectChain(int sessionId)
1359{
1360    Mutex::Autolock _l(mLock);
1361    return getEffectChain_l(sessionId);
1362}
1363
1364sp<AudioFlinger::EffectChain> AudioFlinger::PlaybackThread::getEffectChain_l(int sessionId)
1365{
1366    sp<EffectChain> chain;
1367
1368    size_t size = mEffectChains.size();
1369    for (size_t i = 0; i < size; i++) {
1370        if (mEffectChains[i]->sessionId() == sessionId) {
1371            chain = mEffectChains[i];
1372            break;
1373        }
1374    }
1375    return chain;
1376}
1377
1378void AudioFlinger::PlaybackThread::setMode(uint32_t mode)
1379{
1380    Mutex::Autolock _l(mLock);
1381    size_t size = mEffectChains.size();
1382    for (size_t i = 0; i < size; i++) {
1383        mEffectChains[i]->setMode_l(mode);
1384    }
1385}
1386
1387// ----------------------------------------------------------------------------
1388
1389AudioFlinger::MixerThread::MixerThread(const sp<AudioFlinger>& audioFlinger, AudioStreamOut* output, int id, uint32_t device)
1390    :   PlaybackThread(audioFlinger, output, id, device),
1391        mAudioMixer(0)
1392{
1393    mType = PlaybackThread::MIXER;
1394    mAudioMixer = new AudioMixer(mFrameCount, mSampleRate);
1395
1396    // FIXME - Current mixer implementation only supports stereo output
1397    if (mChannelCount == 1) {
1398        LOGE("Invalid audio hardware channel count");
1399    }
1400}
1401
1402AudioFlinger::MixerThread::~MixerThread()
1403{
1404    delete mAudioMixer;
1405}
1406
1407bool AudioFlinger::MixerThread::threadLoop()
1408{
1409    Vector< sp<Track> > tracksToRemove;
1410    uint32_t mixerStatus = MIXER_IDLE;
1411    nsecs_t standbyTime = systemTime();
1412    size_t mixBufferSize = mFrameCount * mFrameSize;
1413    // FIXME: Relaxed timing because of a certain device that can't meet latency
1414    // Should be reduced to 2x after the vendor fixes the driver issue
1415    nsecs_t maxPeriod = seconds(mFrameCount) / mSampleRate * 3;
1416    nsecs_t lastWarning = 0;
1417    bool longStandbyExit = false;
1418    uint32_t activeSleepTime = activeSleepTimeUs();
1419    uint32_t idleSleepTime = idleSleepTimeUs();
1420    uint32_t sleepTime = idleSleepTime;
1421    Vector< sp<EffectChain> > effectChains;
1422
1423    while (!exitPending())
1424    {
1425        processConfigEvents();
1426
1427        mixerStatus = MIXER_IDLE;
1428        { // scope for mLock
1429
1430            Mutex::Autolock _l(mLock);
1431
1432            if (checkForNewParameters_l()) {
1433                mixBufferSize = mFrameCount * mFrameSize;
1434                // FIXME: Relaxed timing because of a certain device that can't meet latency
1435                // Should be reduced to 2x after the vendor fixes the driver issue
1436                maxPeriod = seconds(mFrameCount) / mSampleRate * 3;
1437                activeSleepTime = activeSleepTimeUs();
1438                idleSleepTime = idleSleepTimeUs();
1439            }
1440
1441            const SortedVector< wp<Track> >& activeTracks = mActiveTracks;
1442
1443            // put audio hardware into standby after short delay
1444            if UNLIKELY((!activeTracks.size() && systemTime() > standbyTime) ||
1445                        mSuspended) {
1446                if (!mStandby) {
1447                    LOGV("Audio hardware entering standby, mixer %p, mSuspended %d\n", this, mSuspended);
1448                    mOutput->standby();
1449                    mStandby = true;
1450                    mBytesWritten = 0;
1451                }
1452
1453                if (!activeTracks.size() && mConfigEvents.isEmpty()) {
1454                    // we're about to wait, flush the binder command buffer
1455                    IPCThreadState::self()->flushCommands();
1456
1457                    if (exitPending()) break;
1458
1459                    // wait until we have something to do...
1460                    LOGV("MixerThread %p TID %d going to sleep\n", this, gettid());
1461                    mWaitWorkCV.wait(mLock);
1462                    LOGV("MixerThread %p TID %d waking up\n", this, gettid());
1463
1464                    if (mMasterMute == false) {
1465                        char value[PROPERTY_VALUE_MAX];
1466                        property_get("ro.audio.silent", value, "0");
1467                        if (atoi(value)) {
1468                            LOGD("Silence is golden");
1469                            setMasterMute(true);
1470                        }
1471                    }
1472
1473                    standbyTime = systemTime() + kStandbyTimeInNsecs;
1474                    sleepTime = idleSleepTime;
1475                    continue;
1476                }
1477            }
1478
1479            mixerStatus = prepareTracks_l(activeTracks, &tracksToRemove);
1480
1481            // prevent any changes in effect chain list and in each effect chain
1482            // during mixing and effect process as the audio buffers could be deleted
1483            // or modified if an effect is created or deleted
1484            lockEffectChains_l(effectChains);
1485       }
1486
1487        if (LIKELY(mixerStatus == MIXER_TRACKS_READY)) {
1488            // mix buffers...
1489            mAudioMixer->process();
1490            sleepTime = 0;
1491            standbyTime = systemTime() + kStandbyTimeInNsecs;
1492            //TODO: delay standby when effects have a tail
1493        } else {
1494            // If no tracks are ready, sleep once for the duration of an output
1495            // buffer size, then write 0s to the output
1496            if (sleepTime == 0) {
1497                if (mixerStatus == MIXER_TRACKS_ENABLED) {
1498                    sleepTime = activeSleepTime;
1499                } else {
1500                    sleepTime = idleSleepTime;
1501                }
1502            } else if (mBytesWritten != 0 ||
1503                       (mixerStatus == MIXER_TRACKS_ENABLED && longStandbyExit)) {
1504                memset (mMixBuffer, 0, mixBufferSize);
1505                sleepTime = 0;
1506                LOGV_IF((mBytesWritten == 0 && (mixerStatus == MIXER_TRACKS_ENABLED && longStandbyExit)), "anticipated start");
1507            }
1508            // TODO add standby time extension fct of effect tail
1509        }
1510
1511        if (mSuspended) {
1512            sleepTime = suspendSleepTimeUs();
1513        }
1514        // sleepTime == 0 means we must write to audio hardware
1515        if (sleepTime == 0) {
1516             for (size_t i = 0; i < effectChains.size(); i ++) {
1517                 effectChains[i]->process_l();
1518             }
1519             // enable changes in effect chain
1520             unlockEffectChains(effectChains);
1521            mLastWriteTime = systemTime();
1522            mInWrite = true;
1523            mBytesWritten += mixBufferSize;
1524
1525            int bytesWritten = (int)mOutput->write(mMixBuffer, mixBufferSize);
1526            if (bytesWritten < 0) mBytesWritten -= mixBufferSize;
1527            mNumWrites++;
1528            mInWrite = false;
1529            nsecs_t now = systemTime();
1530            nsecs_t delta = now - mLastWriteTime;
1531            if (delta > maxPeriod) {
1532                mNumDelayedWrites++;
1533                if ((now - lastWarning) > kWarningThrottle) {
1534                    LOGW("write blocked for %llu msecs, %d delayed writes, thread %p",
1535                            ns2ms(delta), mNumDelayedWrites, this);
1536                    lastWarning = now;
1537                }
1538                if (mStandby) {
1539                    longStandbyExit = true;
1540                }
1541            }
1542            mStandby = false;
1543        } else {
1544            // enable changes in effect chain
1545            unlockEffectChains(effectChains);
1546            usleep(sleepTime);
1547        }
1548
1549        // finally let go of all our tracks, without the lock held
1550        // since we can't guarantee the destructors won't acquire that
1551        // same lock.
1552        tracksToRemove.clear();
1553
1554        // Effect chains will be actually deleted here if they were removed from
1555        // mEffectChains list during mixing or effects processing
1556        effectChains.clear();
1557    }
1558
1559    if (!mStandby) {
1560        mOutput->standby();
1561    }
1562
1563    LOGV("MixerThread %p exiting", this);
1564    return false;
1565}
1566
1567// prepareTracks_l() must be called with ThreadBase::mLock held
1568uint32_t AudioFlinger::MixerThread::prepareTracks_l(const SortedVector< wp<Track> >& activeTracks, Vector< sp<Track> > *tracksToRemove)
1569{
1570
1571    uint32_t mixerStatus = MIXER_IDLE;
1572    // find out which tracks need to be processed
1573    size_t count = activeTracks.size();
1574    size_t mixedTracks = 0;
1575    size_t tracksWithEffect = 0;
1576
1577    float masterVolume = mMasterVolume;
1578    bool  masterMute = mMasterMute;
1579
1580    if (masterMute) {
1581        masterVolume = 0;
1582    }
1583    // Delegate master volume control to effect in output mix effect chain if needed
1584    sp<EffectChain> chain = getEffectChain_l(AudioSystem::SESSION_OUTPUT_MIX);
1585    if (chain != 0) {
1586        uint32_t v = (uint32_t)(masterVolume * (1 << 24));
1587        chain->setVolume_l(&v, &v);
1588        masterVolume = (float)((v + (1 << 23)) >> 24);
1589        chain.clear();
1590    }
1591
1592    for (size_t i=0 ; i<count ; i++) {
1593        sp<Track> t = activeTracks[i].promote();
1594        if (t == 0) continue;
1595
1596        Track* const track = t.get();
1597        audio_track_cblk_t* cblk = track->cblk();
1598
1599        // The first time a track is added we wait
1600        // for all its buffers to be filled before processing it
1601        mAudioMixer->setActiveTrack(track->name());
1602        if (cblk->framesReady() && track->isReady() &&
1603                !track->isPaused() && !track->isTerminated())
1604        {
1605            //LOGV("track %d u=%08x, s=%08x [OK] on thread %p", track->name(), cblk->user, cblk->server, this);
1606
1607            mixedTracks++;
1608
1609            // track->mainBuffer() != mMixBuffer means there is an effect chain
1610            // connected to the track
1611            chain.clear();
1612            if (track->mainBuffer() != mMixBuffer) {
1613                chain = getEffectChain_l(track->sessionId());
1614                // Delegate volume control to effect in track effect chain if needed
1615                if (chain != 0) {
1616                    tracksWithEffect++;
1617                } else {
1618                    LOGW("prepareTracks_l(): track %08x attached to effect but no chain found on session %d",
1619                            track->name(), track->sessionId());
1620                }
1621            }
1622
1623
1624            int param = AudioMixer::VOLUME;
1625            if (track->mFillingUpStatus == Track::FS_FILLED) {
1626                // no ramp for the first volume setting
1627                track->mFillingUpStatus = Track::FS_ACTIVE;
1628                if (track->mState == TrackBase::RESUMING) {
1629                    track->mState = TrackBase::ACTIVE;
1630                    param = AudioMixer::RAMP_VOLUME;
1631                }
1632                mAudioMixer->setParameter(AudioMixer::RESAMPLE, AudioMixer::RESET, NULL);
1633            } else if (cblk->server != 0) {
1634                // If the track is stopped before the first frame was mixed,
1635                // do not apply ramp
1636                param = AudioMixer::RAMP_VOLUME;
1637            }
1638
1639            // compute volume for this track
1640            uint32_t vl, vr, va;
1641            if (track->isMuted() || track->isPausing() ||
1642                mStreamTypes[track->type()].mute) {
1643                vl = vr = va = 0;
1644                if (track->isPausing()) {
1645                    track->setPaused();
1646                }
1647            } else {
1648
1649                // read original volumes with volume control
1650                float typeVolume = mStreamTypes[track->type()].volume;
1651                float v = masterVolume * typeVolume;
1652                vl = (uint32_t)(v * cblk->volume[0]) << 12;
1653                vr = (uint32_t)(v * cblk->volume[1]) << 12;
1654
1655                va = (uint32_t)(v * cblk->sendLevel);
1656            }
1657            // Delegate volume control to effect in track effect chain if needed
1658            if (chain != 0 && chain->setVolume_l(&vl, &vr)) {
1659                // Do not ramp volume if volume is controlled by effect
1660                param = AudioMixer::VOLUME;
1661                track->mHasVolumeController = true;
1662            } else {
1663                // force no volume ramp when volume controller was just disabled or removed
1664                // from effect chain to avoid volume spike
1665                if (track->mHasVolumeController) {
1666                    param = AudioMixer::VOLUME;
1667                }
1668                track->mHasVolumeController = false;
1669            }
1670
1671            // Convert volumes from 8.24 to 4.12 format
1672            int16_t left, right, aux;
1673            uint32_t v_clamped = (vl + (1 << 11)) >> 12;
1674            if (v_clamped > MAX_GAIN_INT) v_clamped = MAX_GAIN_INT;
1675            left = int16_t(v_clamped);
1676            v_clamped = (vr + (1 << 11)) >> 12;
1677            if (v_clamped > MAX_GAIN_INT) v_clamped = MAX_GAIN_INT;
1678            right = int16_t(v_clamped);
1679
1680            if (va > MAX_GAIN_INT) va = MAX_GAIN_INT;
1681            aux = int16_t(va);
1682
1683            // XXX: these things DON'T need to be done each time
1684            mAudioMixer->setBufferProvider(track);
1685            mAudioMixer->enable(AudioMixer::MIXING);
1686
1687            mAudioMixer->setParameter(param, AudioMixer::VOLUME0, (void *)left);
1688            mAudioMixer->setParameter(param, AudioMixer::VOLUME1, (void *)right);
1689            mAudioMixer->setParameter(param, AudioMixer::AUXLEVEL, (void *)aux);
1690            mAudioMixer->setParameter(
1691                AudioMixer::TRACK,
1692                AudioMixer::FORMAT, (void *)track->format());
1693            mAudioMixer->setParameter(
1694                AudioMixer::TRACK,
1695                AudioMixer::CHANNEL_COUNT, (void *)track->channelCount());
1696            mAudioMixer->setParameter(
1697                AudioMixer::RESAMPLE,
1698                AudioMixer::SAMPLE_RATE,
1699                (void *)(cblk->sampleRate));
1700            mAudioMixer->setParameter(
1701                AudioMixer::TRACK,
1702                AudioMixer::MAIN_BUFFER, (void *)track->mainBuffer());
1703            mAudioMixer->setParameter(
1704                AudioMixer::TRACK,
1705                AudioMixer::AUX_BUFFER, (void *)track->auxBuffer());
1706
1707            // reset retry count
1708            track->mRetryCount = kMaxTrackRetries;
1709            mixerStatus = MIXER_TRACKS_READY;
1710        } else {
1711            //LOGV("track %d u=%08x, s=%08x [NOT READY] on thread %p", track->name(), cblk->user, cblk->server, this);
1712            if (track->isStopped()) {
1713                track->reset();
1714            }
1715            if (track->isTerminated() || track->isStopped() || track->isPaused()) {
1716                // We have consumed all the buffers of this track.
1717                // Remove it from the list of active tracks.
1718                tracksToRemove->add(track);
1719            } else {
1720                // No buffers for this track. Give it a few chances to
1721                // fill a buffer, then remove it from active list.
1722                if (--(track->mRetryCount) <= 0) {
1723                    LOGV("BUFFER TIMEOUT: remove(%d) from active list on thread %p", track->name(), this);
1724                    tracksToRemove->add(track);
1725                    // indicate to client process that the track was disabled because of underrun
1726                    cblk->flags |= CBLK_DISABLED_ON;
1727                } else if (mixerStatus != MIXER_TRACKS_READY) {
1728                    mixerStatus = MIXER_TRACKS_ENABLED;
1729                }
1730            }
1731            mAudioMixer->disable(AudioMixer::MIXING);
1732        }
1733    }
1734
1735    // remove all the tracks that need to be...
1736    count = tracksToRemove->size();
1737    if (UNLIKELY(count)) {
1738        for (size_t i=0 ; i<count ; i++) {
1739            const sp<Track>& track = tracksToRemove->itemAt(i);
1740            mActiveTracks.remove(track);
1741            if (track->mainBuffer() != mMixBuffer) {
1742                chain = getEffectChain_l(track->sessionId());
1743                if (chain != 0) {
1744                    LOGV("stopping track on chain %p for session Id: %d", chain.get(), track->sessionId());
1745                    chain->stopTrack();
1746                }
1747            }
1748            if (track->isTerminated()) {
1749                mTracks.remove(track);
1750                deleteTrackName_l(track->mName);
1751            }
1752        }
1753    }
1754
1755    // mix buffer must be cleared if all tracks are connected to an
1756    // effect chain as in this case the mixer will not write to
1757    // mix buffer and track effects will accumulate into it
1758    if (mixedTracks != 0 && mixedTracks == tracksWithEffect) {
1759        memset(mMixBuffer, 0, mFrameCount * mChannelCount * sizeof(int16_t));
1760    }
1761
1762    return mixerStatus;
1763}
1764
1765void AudioFlinger::MixerThread::invalidateTracks(int streamType)
1766{
1767    LOGV ("MixerThread::invalidateTracks() mixer %p, streamType %d, mTracks.size %d",
1768            this,  streamType, mTracks.size());
1769    Mutex::Autolock _l(mLock);
1770
1771    size_t size = mTracks.size();
1772    for (size_t i = 0; i < size; i++) {
1773        sp<Track> t = mTracks[i];
1774        if (t->type() == streamType) {
1775            t->mCblk->lock.lock();
1776            t->mCblk->flags |= CBLK_INVALID_ON;
1777            t->mCblk->cv.signal();
1778            t->mCblk->lock.unlock();
1779        }
1780    }
1781}
1782
1783
1784// getTrackName_l() must be called with ThreadBase::mLock held
1785int AudioFlinger::MixerThread::getTrackName_l()
1786{
1787    return mAudioMixer->getTrackName();
1788}
1789
1790// deleteTrackName_l() must be called with ThreadBase::mLock held
1791void AudioFlinger::MixerThread::deleteTrackName_l(int name)
1792{
1793    LOGV("remove track (%d) and delete from mixer", name);
1794    mAudioMixer->deleteTrackName(name);
1795}
1796
1797// checkForNewParameters_l() must be called with ThreadBase::mLock held
1798bool AudioFlinger::MixerThread::checkForNewParameters_l()
1799{
1800    bool reconfig = false;
1801
1802    while (!mNewParameters.isEmpty()) {
1803        status_t status = NO_ERROR;
1804        String8 keyValuePair = mNewParameters[0];
1805        AudioParameter param = AudioParameter(keyValuePair);
1806        int value;
1807
1808        if (param.getInt(String8(AudioParameter::keySamplingRate), value) == NO_ERROR) {
1809            reconfig = true;
1810        }
1811        if (param.getInt(String8(AudioParameter::keyFormat), value) == NO_ERROR) {
1812            if (value != AudioSystem::PCM_16_BIT) {
1813                status = BAD_VALUE;
1814            } else {
1815                reconfig = true;
1816            }
1817        }
1818        if (param.getInt(String8(AudioParameter::keyChannels), value) == NO_ERROR) {
1819            if (value != AudioSystem::CHANNEL_OUT_STEREO) {
1820                status = BAD_VALUE;
1821            } else {
1822                reconfig = true;
1823            }
1824        }
1825        if (param.getInt(String8(AudioParameter::keyFrameCount), value) == NO_ERROR) {
1826            // do not accept frame count changes if tracks are open as the track buffer
1827            // size depends on frame count and correct behavior would not be garantied
1828            // if frame count is changed after track creation
1829            if (!mTracks.isEmpty()) {
1830                status = INVALID_OPERATION;
1831            } else {
1832                reconfig = true;
1833            }
1834        }
1835        if (param.getInt(String8(AudioParameter::keyRouting), value) == NO_ERROR) {
1836            // forward device change to effects that have requested to be
1837            // aware of attached audio device.
1838            mDevice = (uint32_t)value;
1839            for (size_t i = 0; i < mEffectChains.size(); i++) {
1840                mEffectChains[i]->setDevice_l(mDevice);
1841            }
1842        }
1843
1844        if (status == NO_ERROR) {
1845            status = mOutput->setParameters(keyValuePair);
1846            if (!mStandby && status == INVALID_OPERATION) {
1847               mOutput->standby();
1848               mStandby = true;
1849               mBytesWritten = 0;
1850               status = mOutput->setParameters(keyValuePair);
1851            }
1852            if (status == NO_ERROR && reconfig) {
1853                delete mAudioMixer;
1854                readOutputParameters();
1855                mAudioMixer = new AudioMixer(mFrameCount, mSampleRate);
1856                for (size_t i = 0; i < mTracks.size() ; i++) {
1857                    int name = getTrackName_l();
1858                    if (name < 0) break;
1859                    mTracks[i]->mName = name;
1860                    // limit track sample rate to 2 x new output sample rate
1861                    if (mTracks[i]->mCblk->sampleRate > 2 * sampleRate()) {
1862                        mTracks[i]->mCblk->sampleRate = 2 * sampleRate();
1863                    }
1864                }
1865                sendConfigEvent_l(AudioSystem::OUTPUT_CONFIG_CHANGED);
1866            }
1867        }
1868
1869        mNewParameters.removeAt(0);
1870
1871        mParamStatus = status;
1872        mParamCond.signal();
1873        mWaitWorkCV.wait(mLock);
1874    }
1875    return reconfig;
1876}
1877
1878status_t AudioFlinger::MixerThread::dumpInternals(int fd, const Vector<String16>& args)
1879{
1880    const size_t SIZE = 256;
1881    char buffer[SIZE];
1882    String8 result;
1883
1884    PlaybackThread::dumpInternals(fd, args);
1885
1886    snprintf(buffer, SIZE, "AudioMixer tracks: %08x\n", mAudioMixer->trackNames());
1887    result.append(buffer);
1888    write(fd, result.string(), result.size());
1889    return NO_ERROR;
1890}
1891
1892uint32_t AudioFlinger::MixerThread::activeSleepTimeUs()
1893{
1894    return (uint32_t)(mOutput->latency() * 1000) / 2;
1895}
1896
1897uint32_t AudioFlinger::MixerThread::idleSleepTimeUs()
1898{
1899    return (uint32_t)(((mFrameCount * 1000) / mSampleRate) * 1000) / 2;
1900}
1901
1902uint32_t AudioFlinger::MixerThread::suspendSleepTimeUs()
1903{
1904    return (uint32_t)(((mFrameCount * 1000) / mSampleRate) * 1000);
1905}
1906
1907// ----------------------------------------------------------------------------
1908AudioFlinger::DirectOutputThread::DirectOutputThread(const sp<AudioFlinger>& audioFlinger, AudioStreamOut* output, int id, uint32_t device)
1909    :   PlaybackThread(audioFlinger, output, id, device)
1910{
1911    mType = PlaybackThread::DIRECT;
1912}
1913
1914AudioFlinger::DirectOutputThread::~DirectOutputThread()
1915{
1916}
1917
1918
1919static inline int16_t clamp16(int32_t sample)
1920{
1921    if ((sample>>15) ^ (sample>>31))
1922        sample = 0x7FFF ^ (sample>>31);
1923    return sample;
1924}
1925
1926static inline
1927int32_t mul(int16_t in, int16_t v)
1928{
1929#if defined(__arm__) && !defined(__thumb__)
1930    int32_t out;
1931    asm( "smulbb %[out], %[in], %[v] \n"
1932         : [out]"=r"(out)
1933         : [in]"%r"(in), [v]"r"(v)
1934         : );
1935    return out;
1936#else
1937    return in * int32_t(v);
1938#endif
1939}
1940
1941void AudioFlinger::DirectOutputThread::applyVolume(uint16_t leftVol, uint16_t rightVol, bool ramp)
1942{
1943    // Do not apply volume on compressed audio
1944    if (!AudioSystem::isLinearPCM(mFormat)) {
1945        return;
1946    }
1947
1948    // convert to signed 16 bit before volume calculation
1949    if (mFormat == AudioSystem::PCM_8_BIT) {
1950        size_t count = mFrameCount * mChannelCount;
1951        uint8_t *src = (uint8_t *)mMixBuffer + count-1;
1952        int16_t *dst = mMixBuffer + count-1;
1953        while(count--) {
1954            *dst-- = (int16_t)(*src--^0x80) << 8;
1955        }
1956    }
1957
1958    size_t frameCount = mFrameCount;
1959    int16_t *out = mMixBuffer;
1960    if (ramp) {
1961        if (mChannelCount == 1) {
1962            int32_t d = ((int32_t)leftVol - (int32_t)mLeftVolShort) << 16;
1963            int32_t vlInc = d / (int32_t)frameCount;
1964            int32_t vl = ((int32_t)mLeftVolShort << 16);
1965            do {
1966                out[0] = clamp16(mul(out[0], vl >> 16) >> 12);
1967                out++;
1968                vl += vlInc;
1969            } while (--frameCount);
1970
1971        } else {
1972            int32_t d = ((int32_t)leftVol - (int32_t)mLeftVolShort) << 16;
1973            int32_t vlInc = d / (int32_t)frameCount;
1974            d = ((int32_t)rightVol - (int32_t)mRightVolShort) << 16;
1975            int32_t vrInc = d / (int32_t)frameCount;
1976            int32_t vl = ((int32_t)mLeftVolShort << 16);
1977            int32_t vr = ((int32_t)mRightVolShort << 16);
1978            do {
1979                out[0] = clamp16(mul(out[0], vl >> 16) >> 12);
1980                out[1] = clamp16(mul(out[1], vr >> 16) >> 12);
1981                out += 2;
1982                vl += vlInc;
1983                vr += vrInc;
1984            } while (--frameCount);
1985        }
1986    } else {
1987        if (mChannelCount == 1) {
1988            do {
1989                out[0] = clamp16(mul(out[0], leftVol) >> 12);
1990                out++;
1991            } while (--frameCount);
1992        } else {
1993            do {
1994                out[0] = clamp16(mul(out[0], leftVol) >> 12);
1995                out[1] = clamp16(mul(out[1], rightVol) >> 12);
1996                out += 2;
1997            } while (--frameCount);
1998        }
1999    }
2000
2001    // convert back to unsigned 8 bit after volume calculation
2002    if (mFormat == AudioSystem::PCM_8_BIT) {
2003        size_t count = mFrameCount * mChannelCount;
2004        int16_t *src = mMixBuffer;
2005        uint8_t *dst = (uint8_t *)mMixBuffer;
2006        while(count--) {
2007            *dst++ = (uint8_t)(((int32_t)*src++ + (1<<7)) >> 8)^0x80;
2008        }
2009    }
2010
2011    mLeftVolShort = leftVol;
2012    mRightVolShort = rightVol;
2013}
2014
2015bool AudioFlinger::DirectOutputThread::threadLoop()
2016{
2017    uint32_t mixerStatus = MIXER_IDLE;
2018    sp<Track> trackToRemove;
2019    sp<Track> activeTrack;
2020    nsecs_t standbyTime = systemTime();
2021    int8_t *curBuf;
2022    size_t mixBufferSize = mFrameCount*mFrameSize;
2023    uint32_t activeSleepTime = activeSleepTimeUs();
2024    uint32_t idleSleepTime = idleSleepTimeUs();
2025    uint32_t sleepTime = idleSleepTime;
2026    // use shorter standby delay as on normal output to release
2027    // hardware resources as soon as possible
2028    nsecs_t standbyDelay = microseconds(activeSleepTime*2);
2029
2030    while (!exitPending())
2031    {
2032        bool rampVolume;
2033        uint16_t leftVol;
2034        uint16_t rightVol;
2035        Vector< sp<EffectChain> > effectChains;
2036
2037        processConfigEvents();
2038
2039        mixerStatus = MIXER_IDLE;
2040
2041        { // scope for the mLock
2042
2043            Mutex::Autolock _l(mLock);
2044
2045            if (checkForNewParameters_l()) {
2046                mixBufferSize = mFrameCount*mFrameSize;
2047                activeSleepTime = activeSleepTimeUs();
2048                idleSleepTime = idleSleepTimeUs();
2049                standbyDelay = microseconds(activeSleepTime*2);
2050            }
2051
2052            // put audio hardware into standby after short delay
2053            if UNLIKELY((!mActiveTracks.size() && systemTime() > standbyTime) ||
2054                        mSuspended) {
2055                // wait until we have something to do...
2056                if (!mStandby) {
2057                    LOGV("Audio hardware entering standby, mixer %p\n", this);
2058                    mOutput->standby();
2059                    mStandby = true;
2060                    mBytesWritten = 0;
2061                }
2062
2063                if (!mActiveTracks.size() && mConfigEvents.isEmpty()) {
2064                    // we're about to wait, flush the binder command buffer
2065                    IPCThreadState::self()->flushCommands();
2066
2067                    if (exitPending()) break;
2068
2069                    LOGV("DirectOutputThread %p TID %d going to sleep\n", this, gettid());
2070                    mWaitWorkCV.wait(mLock);
2071                    LOGV("DirectOutputThread %p TID %d waking up in active mode\n", this, gettid());
2072
2073                    if (mMasterMute == false) {
2074                        char value[PROPERTY_VALUE_MAX];
2075                        property_get("ro.audio.silent", value, "0");
2076                        if (atoi(value)) {
2077                            LOGD("Silence is golden");
2078                            setMasterMute(true);
2079                        }
2080                    }
2081
2082                    standbyTime = systemTime() + standbyDelay;
2083                    sleepTime = idleSleepTime;
2084                    continue;
2085                }
2086            }
2087
2088            effectChains = mEffectChains;
2089
2090            // find out which tracks need to be processed
2091            if (mActiveTracks.size() != 0) {
2092                sp<Track> t = mActiveTracks[0].promote();
2093                if (t == 0) continue;
2094
2095                Track* const track = t.get();
2096                audio_track_cblk_t* cblk = track->cblk();
2097
2098                // The first time a track is added we wait
2099                // for all its buffers to be filled before processing it
2100                if (cblk->framesReady() && track->isReady() &&
2101                        !track->isPaused() && !track->isTerminated())
2102                {
2103                    //LOGV("track %d u=%08x, s=%08x [OK]", track->name(), cblk->user, cblk->server);
2104
2105                    if (track->mFillingUpStatus == Track::FS_FILLED) {
2106                        track->mFillingUpStatus = Track::FS_ACTIVE;
2107                        mLeftVolFloat = mRightVolFloat = 0;
2108                        mLeftVolShort = mRightVolShort = 0;
2109                        if (track->mState == TrackBase::RESUMING) {
2110                            track->mState = TrackBase::ACTIVE;
2111                            rampVolume = true;
2112                        }
2113                    } else if (cblk->server != 0) {
2114                        // If the track is stopped before the first frame was mixed,
2115                        // do not apply ramp
2116                        rampVolume = true;
2117                    }
2118                    // compute volume for this track
2119                    float left, right;
2120                    if (track->isMuted() || mMasterMute || track->isPausing() ||
2121                        mStreamTypes[track->type()].mute) {
2122                        left = right = 0;
2123                        if (track->isPausing()) {
2124                            track->setPaused();
2125                        }
2126                    } else {
2127                        float typeVolume = mStreamTypes[track->type()].volume;
2128                        float v = mMasterVolume * typeVolume;
2129                        float v_clamped = v * cblk->volume[0];
2130                        if (v_clamped > MAX_GAIN) v_clamped = MAX_GAIN;
2131                        left = v_clamped/MAX_GAIN;
2132                        v_clamped = v * cblk->volume[1];
2133                        if (v_clamped > MAX_GAIN) v_clamped = MAX_GAIN;
2134                        right = v_clamped/MAX_GAIN;
2135                    }
2136
2137                    if (left != mLeftVolFloat || right != mRightVolFloat) {
2138                        mLeftVolFloat = left;
2139                        mRightVolFloat = right;
2140
2141                        // If audio HAL implements volume control,
2142                        // force software volume to nominal value
2143                        if (mOutput->setVolume(left, right) == NO_ERROR) {
2144                            left = 1.0f;
2145                            right = 1.0f;
2146                        }
2147
2148                        // Convert volumes from float to 8.24
2149                        uint32_t vl = (uint32_t)(left * (1 << 24));
2150                        uint32_t vr = (uint32_t)(right * (1 << 24));
2151
2152                        // Delegate volume control to effect in track effect chain if needed
2153                        // only one effect chain can be present on DirectOutputThread, so if
2154                        // there is one, the track is connected to it
2155                        if (!effectChains.isEmpty()) {
2156                            // Do not ramp volume if volume is controlled by effect
2157                            if(effectChains[0]->setVolume_l(&vl, &vr)) {
2158                                rampVolume = false;
2159                            }
2160                        }
2161
2162                        // Convert volumes from 8.24 to 4.12 format
2163                        uint32_t v_clamped = (vl + (1 << 11)) >> 12;
2164                        if (v_clamped > MAX_GAIN_INT) v_clamped = MAX_GAIN_INT;
2165                        leftVol = (uint16_t)v_clamped;
2166                        v_clamped = (vr + (1 << 11)) >> 12;
2167                        if (v_clamped > MAX_GAIN_INT) v_clamped = MAX_GAIN_INT;
2168                        rightVol = (uint16_t)v_clamped;
2169                    } else {
2170                        leftVol = mLeftVolShort;
2171                        rightVol = mRightVolShort;
2172                        rampVolume = false;
2173                    }
2174
2175                    // reset retry count
2176                    track->mRetryCount = kMaxTrackRetriesDirect;
2177                    activeTrack = t;
2178                    mixerStatus = MIXER_TRACKS_READY;
2179                } else {
2180                    //LOGV("track %d u=%08x, s=%08x [NOT READY]", track->name(), cblk->user, cblk->server);
2181                    if (track->isStopped()) {
2182                        track->reset();
2183                    }
2184                    if (track->isTerminated() || track->isStopped() || track->isPaused()) {
2185                        // We have consumed all the buffers of this track.
2186                        // Remove it from the list of active tracks.
2187                        trackToRemove = track;
2188                    } else {
2189                        // No buffers for this track. Give it a few chances to
2190                        // fill a buffer, then remove it from active list.
2191                        if (--(track->mRetryCount) <= 0) {
2192                            LOGV("BUFFER TIMEOUT: remove(%d) from active list", track->name());
2193                            trackToRemove = track;
2194                        } else {
2195                            mixerStatus = MIXER_TRACKS_ENABLED;
2196                        }
2197                    }
2198                }
2199            }
2200
2201            // remove all the tracks that need to be...
2202            if (UNLIKELY(trackToRemove != 0)) {
2203                mActiveTracks.remove(trackToRemove);
2204                if (!effectChains.isEmpty()) {
2205                    LOGV("stopping track on chain %p for session Id: %d", effectChains[0].get(),
2206                            trackToRemove->sessionId());
2207                    effectChains[0]->stopTrack();
2208                }
2209                if (trackToRemove->isTerminated()) {
2210                    mTracks.remove(trackToRemove);
2211                    deleteTrackName_l(trackToRemove->mName);
2212                }
2213            }
2214
2215            lockEffectChains_l(effectChains);
2216       }
2217
2218        if (LIKELY(mixerStatus == MIXER_TRACKS_READY)) {
2219            AudioBufferProvider::Buffer buffer;
2220            size_t frameCount = mFrameCount;
2221            curBuf = (int8_t *)mMixBuffer;
2222            // output audio to hardware
2223            while (frameCount) {
2224                buffer.frameCount = frameCount;
2225                activeTrack->getNextBuffer(&buffer);
2226                if (UNLIKELY(buffer.raw == 0)) {
2227                    memset(curBuf, 0, frameCount * mFrameSize);
2228                    break;
2229                }
2230                memcpy(curBuf, buffer.raw, buffer.frameCount * mFrameSize);
2231                frameCount -= buffer.frameCount;
2232                curBuf += buffer.frameCount * mFrameSize;
2233                activeTrack->releaseBuffer(&buffer);
2234            }
2235            sleepTime = 0;
2236            standbyTime = systemTime() + standbyDelay;
2237        } else {
2238            if (sleepTime == 0) {
2239                if (mixerStatus == MIXER_TRACKS_ENABLED) {
2240                    sleepTime = activeSleepTime;
2241                } else {
2242                    sleepTime = idleSleepTime;
2243                }
2244            } else if (mBytesWritten != 0 && AudioSystem::isLinearPCM(mFormat)) {
2245                memset (mMixBuffer, 0, mFrameCount * mFrameSize);
2246                sleepTime = 0;
2247            }
2248        }
2249
2250        if (mSuspended) {
2251            sleepTime = suspendSleepTimeUs();
2252        }
2253        // sleepTime == 0 means we must write to audio hardware
2254        if (sleepTime == 0) {
2255            if (mixerStatus == MIXER_TRACKS_READY) {
2256                applyVolume(leftVol, rightVol, rampVolume);
2257            }
2258            for (size_t i = 0; i < effectChains.size(); i ++) {
2259                effectChains[i]->process_l();
2260            }
2261            unlockEffectChains(effectChains);
2262
2263            mLastWriteTime = systemTime();
2264            mInWrite = true;
2265            mBytesWritten += mixBufferSize;
2266            int bytesWritten = (int)mOutput->write(mMixBuffer, mixBufferSize);
2267            if (bytesWritten < 0) mBytesWritten -= mixBufferSize;
2268            mNumWrites++;
2269            mInWrite = false;
2270            mStandby = false;
2271        } else {
2272            unlockEffectChains(effectChains);
2273            usleep(sleepTime);
2274        }
2275
2276        // finally let go of removed track, without the lock held
2277        // since we can't guarantee the destructors won't acquire that
2278        // same lock.
2279        trackToRemove.clear();
2280        activeTrack.clear();
2281
2282        // Effect chains will be actually deleted here if they were removed from
2283        // mEffectChains list during mixing or effects processing
2284        effectChains.clear();
2285    }
2286
2287    if (!mStandby) {
2288        mOutput->standby();
2289    }
2290
2291    LOGV("DirectOutputThread %p exiting", this);
2292    return false;
2293}
2294
2295// getTrackName_l() must be called with ThreadBase::mLock held
2296int AudioFlinger::DirectOutputThread::getTrackName_l()
2297{
2298    return 0;
2299}
2300
2301// deleteTrackName_l() must be called with ThreadBase::mLock held
2302void AudioFlinger::DirectOutputThread::deleteTrackName_l(int name)
2303{
2304}
2305
2306// checkForNewParameters_l() must be called with ThreadBase::mLock held
2307bool AudioFlinger::DirectOutputThread::checkForNewParameters_l()
2308{
2309    bool reconfig = false;
2310
2311    while (!mNewParameters.isEmpty()) {
2312        status_t status = NO_ERROR;
2313        String8 keyValuePair = mNewParameters[0];
2314        AudioParameter param = AudioParameter(keyValuePair);
2315        int value;
2316
2317        if (param.getInt(String8(AudioParameter::keyFrameCount), value) == NO_ERROR) {
2318            // do not accept frame count changes if tracks are open as the track buffer
2319            // size depends on frame count and correct behavior would not be garantied
2320            // if frame count is changed after track creation
2321            if (!mTracks.isEmpty()) {
2322                status = INVALID_OPERATION;
2323            } else {
2324                reconfig = true;
2325            }
2326        }
2327        if (status == NO_ERROR) {
2328            status = mOutput->setParameters(keyValuePair);
2329            if (!mStandby && status == INVALID_OPERATION) {
2330               mOutput->standby();
2331               mStandby = true;
2332               mBytesWritten = 0;
2333               status = mOutput->setParameters(keyValuePair);
2334            }
2335            if (status == NO_ERROR && reconfig) {
2336                readOutputParameters();
2337                sendConfigEvent_l(AudioSystem::OUTPUT_CONFIG_CHANGED);
2338            }
2339        }
2340
2341        mNewParameters.removeAt(0);
2342
2343        mParamStatus = status;
2344        mParamCond.signal();
2345        mWaitWorkCV.wait(mLock);
2346    }
2347    return reconfig;
2348}
2349
2350uint32_t AudioFlinger::DirectOutputThread::activeSleepTimeUs()
2351{
2352    uint32_t time;
2353    if (AudioSystem::isLinearPCM(mFormat)) {
2354        time = (uint32_t)(mOutput->latency() * 1000) / 2;
2355    } else {
2356        time = 10000;
2357    }
2358    return time;
2359}
2360
2361uint32_t AudioFlinger::DirectOutputThread::idleSleepTimeUs()
2362{
2363    uint32_t time;
2364    if (AudioSystem::isLinearPCM(mFormat)) {
2365        time = (uint32_t)(((mFrameCount * 1000) / mSampleRate) * 1000) / 2;
2366    } else {
2367        time = 10000;
2368    }
2369    return time;
2370}
2371
2372uint32_t AudioFlinger::DirectOutputThread::suspendSleepTimeUs()
2373{
2374    uint32_t time;
2375    if (AudioSystem::isLinearPCM(mFormat)) {
2376        time = (uint32_t)(((mFrameCount * 1000) / mSampleRate) * 1000);
2377    } else {
2378        time = 10000;
2379    }
2380    return time;
2381}
2382
2383
2384// ----------------------------------------------------------------------------
2385
2386AudioFlinger::DuplicatingThread::DuplicatingThread(const sp<AudioFlinger>& audioFlinger, AudioFlinger::MixerThread* mainThread, int id)
2387    :   MixerThread(audioFlinger, mainThread->getOutput(), id, mainThread->device()), mWaitTimeMs(UINT_MAX)
2388{
2389    mType = PlaybackThread::DUPLICATING;
2390    addOutputTrack(mainThread);
2391}
2392
2393AudioFlinger::DuplicatingThread::~DuplicatingThread()
2394{
2395    for (size_t i = 0; i < mOutputTracks.size(); i++) {
2396        mOutputTracks[i]->destroy();
2397    }
2398    mOutputTracks.clear();
2399}
2400
2401bool AudioFlinger::DuplicatingThread::threadLoop()
2402{
2403    Vector< sp<Track> > tracksToRemove;
2404    uint32_t mixerStatus = MIXER_IDLE;
2405    nsecs_t standbyTime = systemTime();
2406    size_t mixBufferSize = mFrameCount*mFrameSize;
2407    SortedVector< sp<OutputTrack> > outputTracks;
2408    uint32_t writeFrames = 0;
2409    uint32_t activeSleepTime = activeSleepTimeUs();
2410    uint32_t idleSleepTime = idleSleepTimeUs();
2411    uint32_t sleepTime = idleSleepTime;
2412    Vector< sp<EffectChain> > effectChains;
2413
2414    while (!exitPending())
2415    {
2416        processConfigEvents();
2417
2418        mixerStatus = MIXER_IDLE;
2419        { // scope for the mLock
2420
2421            Mutex::Autolock _l(mLock);
2422
2423            if (checkForNewParameters_l()) {
2424                mixBufferSize = mFrameCount*mFrameSize;
2425                updateWaitTime();
2426                activeSleepTime = activeSleepTimeUs();
2427                idleSleepTime = idleSleepTimeUs();
2428            }
2429
2430            const SortedVector< wp<Track> >& activeTracks = mActiveTracks;
2431
2432            for (size_t i = 0; i < mOutputTracks.size(); i++) {
2433                outputTracks.add(mOutputTracks[i]);
2434            }
2435
2436            // put audio hardware into standby after short delay
2437            if UNLIKELY((!activeTracks.size() && systemTime() > standbyTime) ||
2438                         mSuspended) {
2439                if (!mStandby) {
2440                    for (size_t i = 0; i < outputTracks.size(); i++) {
2441                        outputTracks[i]->stop();
2442                    }
2443                    mStandby = true;
2444                    mBytesWritten = 0;
2445                }
2446
2447                if (!activeTracks.size() && mConfigEvents.isEmpty()) {
2448                    // we're about to wait, flush the binder command buffer
2449                    IPCThreadState::self()->flushCommands();
2450                    outputTracks.clear();
2451
2452                    if (exitPending()) break;
2453
2454                    LOGV("DuplicatingThread %p TID %d going to sleep\n", this, gettid());
2455                    mWaitWorkCV.wait(mLock);
2456                    LOGV("DuplicatingThread %p TID %d waking up\n", this, gettid());
2457                    if (mMasterMute == false) {
2458                        char value[PROPERTY_VALUE_MAX];
2459                        property_get("ro.audio.silent", value, "0");
2460                        if (atoi(value)) {
2461                            LOGD("Silence is golden");
2462                            setMasterMute(true);
2463                        }
2464                    }
2465
2466                    standbyTime = systemTime() + kStandbyTimeInNsecs;
2467                    sleepTime = idleSleepTime;
2468                    continue;
2469                }
2470            }
2471
2472            mixerStatus = prepareTracks_l(activeTracks, &tracksToRemove);
2473
2474            // prevent any changes in effect chain list and in each effect chain
2475            // during mixing and effect process as the audio buffers could be deleted
2476            // or modified if an effect is created or deleted
2477            lockEffectChains_l(effectChains);
2478        }
2479
2480        if (LIKELY(mixerStatus == MIXER_TRACKS_READY)) {
2481            // mix buffers...
2482            if (outputsReady(outputTracks)) {
2483                mAudioMixer->process();
2484            } else {
2485                memset(mMixBuffer, 0, mixBufferSize);
2486            }
2487            sleepTime = 0;
2488            writeFrames = mFrameCount;
2489        } else {
2490            if (sleepTime == 0) {
2491                if (mixerStatus == MIXER_TRACKS_ENABLED) {
2492                    sleepTime = activeSleepTime;
2493                } else {
2494                    sleepTime = idleSleepTime;
2495                }
2496            } else if (mBytesWritten != 0) {
2497                // flush remaining overflow buffers in output tracks
2498                for (size_t i = 0; i < outputTracks.size(); i++) {
2499                    if (outputTracks[i]->isActive()) {
2500                        sleepTime = 0;
2501                        writeFrames = 0;
2502                        memset(mMixBuffer, 0, mixBufferSize);
2503                        break;
2504                    }
2505                }
2506            }
2507        }
2508
2509        if (mSuspended) {
2510            sleepTime = suspendSleepTimeUs();
2511        }
2512        // sleepTime == 0 means we must write to audio hardware
2513        if (sleepTime == 0) {
2514            for (size_t i = 0; i < effectChains.size(); i ++) {
2515                effectChains[i]->process_l();
2516            }
2517            // enable changes in effect chain
2518            unlockEffectChains(effectChains);
2519
2520            standbyTime = systemTime() + kStandbyTimeInNsecs;
2521            for (size_t i = 0; i < outputTracks.size(); i++) {
2522                outputTracks[i]->write(mMixBuffer, writeFrames);
2523            }
2524            mStandby = false;
2525            mBytesWritten += mixBufferSize;
2526        } else {
2527            // enable changes in effect chain
2528            unlockEffectChains(effectChains);
2529            usleep(sleepTime);
2530        }
2531
2532        // finally let go of all our tracks, without the lock held
2533        // since we can't guarantee the destructors won't acquire that
2534        // same lock.
2535        tracksToRemove.clear();
2536        outputTracks.clear();
2537
2538        // Effect chains will be actually deleted here if they were removed from
2539        // mEffectChains list during mixing or effects processing
2540        effectChains.clear();
2541    }
2542
2543    return false;
2544}
2545
2546void AudioFlinger::DuplicatingThread::addOutputTrack(MixerThread *thread)
2547{
2548    int frameCount = (3 * mFrameCount * mSampleRate) / thread->sampleRate();
2549    OutputTrack *outputTrack = new OutputTrack((ThreadBase *)thread,
2550                                            this,
2551                                            mSampleRate,
2552                                            mFormat,
2553                                            mChannelCount,
2554                                            frameCount);
2555    if (outputTrack->cblk() != NULL) {
2556        thread->setStreamVolume(AudioSystem::NUM_STREAM_TYPES, 1.0f);
2557        mOutputTracks.add(outputTrack);
2558        LOGV("addOutputTrack() track %p, on thread %p", outputTrack, thread);
2559        updateWaitTime();
2560    }
2561}
2562
2563void AudioFlinger::DuplicatingThread::removeOutputTrack(MixerThread *thread)
2564{
2565    Mutex::Autolock _l(mLock);
2566    for (size_t i = 0; i < mOutputTracks.size(); i++) {
2567        if (mOutputTracks[i]->thread() == (ThreadBase *)thread) {
2568            mOutputTracks[i]->destroy();
2569            mOutputTracks.removeAt(i);
2570            updateWaitTime();
2571            return;
2572        }
2573    }
2574    LOGV("removeOutputTrack(): unkonwn thread: %p", thread);
2575}
2576
2577void AudioFlinger::DuplicatingThread::updateWaitTime()
2578{
2579    mWaitTimeMs = UINT_MAX;
2580    for (size_t i = 0; i < mOutputTracks.size(); i++) {
2581        sp<ThreadBase> strong = mOutputTracks[i]->thread().promote();
2582        if (strong != NULL) {
2583            uint32_t waitTimeMs = (strong->frameCount() * 2 * 1000) / strong->sampleRate();
2584            if (waitTimeMs < mWaitTimeMs) {
2585                mWaitTimeMs = waitTimeMs;
2586            }
2587        }
2588    }
2589}
2590
2591
2592bool AudioFlinger::DuplicatingThread::outputsReady(SortedVector< sp<OutputTrack> > &outputTracks)
2593{
2594    for (size_t i = 0; i < outputTracks.size(); i++) {
2595        sp <ThreadBase> thread = outputTracks[i]->thread().promote();
2596        if (thread == 0) {
2597            LOGW("DuplicatingThread::outputsReady() could not promote thread on output track %p", outputTracks[i].get());
2598            return false;
2599        }
2600        PlaybackThread *playbackThread = (PlaybackThread *)thread.get();
2601        if (playbackThread->standby() && !playbackThread->isSuspended()) {
2602            LOGV("DuplicatingThread output track %p on thread %p Not Ready", outputTracks[i].get(), thread.get());
2603            return false;
2604        }
2605    }
2606    return true;
2607}
2608
2609uint32_t AudioFlinger::DuplicatingThread::activeSleepTimeUs()
2610{
2611    return (mWaitTimeMs * 1000) / 2;
2612}
2613
2614// ----------------------------------------------------------------------------
2615
2616// TrackBase constructor must be called with AudioFlinger::mLock held
2617AudioFlinger::ThreadBase::TrackBase::TrackBase(
2618            const wp<ThreadBase>& thread,
2619            const sp<Client>& client,
2620            uint32_t sampleRate,
2621            int format,
2622            int channelCount,
2623            int frameCount,
2624            uint32_t flags,
2625            const sp<IMemory>& sharedBuffer,
2626            int sessionId)
2627    :   RefBase(),
2628        mThread(thread),
2629        mClient(client),
2630        mCblk(0),
2631        mFrameCount(0),
2632        mState(IDLE),
2633        mClientTid(-1),
2634        mFormat(format),
2635        mFlags(flags & ~SYSTEM_FLAGS_MASK),
2636        mSessionId(sessionId)
2637{
2638    LOGV_IF(sharedBuffer != 0, "sharedBuffer: %p, size: %d", sharedBuffer->pointer(), sharedBuffer->size());
2639
2640    // LOGD("Creating track with %d buffers @ %d bytes", bufferCount, bufferSize);
2641   size_t size = sizeof(audio_track_cblk_t);
2642   size_t bufferSize = frameCount*channelCount*sizeof(int16_t);
2643   if (sharedBuffer == 0) {
2644       size += bufferSize;
2645   }
2646
2647   if (client != NULL) {
2648        mCblkMemory = client->heap()->allocate(size);
2649        if (mCblkMemory != 0) {
2650            mCblk = static_cast<audio_track_cblk_t *>(mCblkMemory->pointer());
2651            if (mCblk) { // construct the shared structure in-place.
2652                new(mCblk) audio_track_cblk_t();
2653                // clear all buffers
2654                mCblk->frameCount = frameCount;
2655                mCblk->sampleRate = sampleRate;
2656                mCblk->channelCount = (uint8_t)channelCount;
2657                if (sharedBuffer == 0) {
2658                    mBuffer = (char*)mCblk + sizeof(audio_track_cblk_t);
2659                    memset(mBuffer, 0, frameCount*channelCount*sizeof(int16_t));
2660                    // Force underrun condition to avoid false underrun callback until first data is
2661                    // written to buffer (other flags are cleared)
2662                    mCblk->flags = CBLK_UNDERRUN_ON;
2663                } else {
2664                    mBuffer = sharedBuffer->pointer();
2665                }
2666                mBufferEnd = (uint8_t *)mBuffer + bufferSize;
2667            }
2668        } else {
2669            LOGE("not enough memory for AudioTrack size=%u", size);
2670            client->heap()->dump("AudioTrack");
2671            return;
2672        }
2673   } else {
2674       mCblk = (audio_track_cblk_t *)(new uint8_t[size]);
2675       if (mCblk) { // construct the shared structure in-place.
2676           new(mCblk) audio_track_cblk_t();
2677           // clear all buffers
2678           mCblk->frameCount = frameCount;
2679           mCblk->sampleRate = sampleRate;
2680           mCblk->channelCount = (uint8_t)channelCount;
2681           mBuffer = (char*)mCblk + sizeof(audio_track_cblk_t);
2682           memset(mBuffer, 0, frameCount*channelCount*sizeof(int16_t));
2683           // Force underrun condition to avoid false underrun callback until first data is
2684           // written to buffer (other flags are cleared)
2685           mCblk->flags = CBLK_UNDERRUN_ON;
2686           mBufferEnd = (uint8_t *)mBuffer + bufferSize;
2687       }
2688   }
2689}
2690
2691AudioFlinger::ThreadBase::TrackBase::~TrackBase()
2692{
2693    if (mCblk) {
2694        mCblk->~audio_track_cblk_t();   // destroy our shared-structure.
2695        if (mClient == NULL) {
2696            delete mCblk;
2697        }
2698    }
2699    mCblkMemory.clear();            // and free the shared memory
2700    if (mClient != NULL) {
2701        Mutex::Autolock _l(mClient->audioFlinger()->mLock);
2702        mClient.clear();
2703    }
2704}
2705
2706void AudioFlinger::ThreadBase::TrackBase::releaseBuffer(AudioBufferProvider::Buffer* buffer)
2707{
2708    buffer->raw = 0;
2709    mFrameCount = buffer->frameCount;
2710    step();
2711    buffer->frameCount = 0;
2712}
2713
2714bool AudioFlinger::ThreadBase::TrackBase::step() {
2715    bool result;
2716    audio_track_cblk_t* cblk = this->cblk();
2717
2718    result = cblk->stepServer(mFrameCount);
2719    if (!result) {
2720        LOGV("stepServer failed acquiring cblk mutex");
2721        mFlags |= STEPSERVER_FAILED;
2722    }
2723    return result;
2724}
2725
2726void AudioFlinger::ThreadBase::TrackBase::reset() {
2727    audio_track_cblk_t* cblk = this->cblk();
2728
2729    cblk->user = 0;
2730    cblk->server = 0;
2731    cblk->userBase = 0;
2732    cblk->serverBase = 0;
2733    mFlags &= (uint32_t)(~SYSTEM_FLAGS_MASK);
2734    LOGV("TrackBase::reset");
2735}
2736
2737sp<IMemory> AudioFlinger::ThreadBase::TrackBase::getCblk() const
2738{
2739    return mCblkMemory;
2740}
2741
2742int AudioFlinger::ThreadBase::TrackBase::sampleRate() const {
2743    return (int)mCblk->sampleRate;
2744}
2745
2746int AudioFlinger::ThreadBase::TrackBase::channelCount() const {
2747    return (int)mCblk->channelCount;
2748}
2749
2750void* AudioFlinger::ThreadBase::TrackBase::getBuffer(uint32_t offset, uint32_t frames) const {
2751    audio_track_cblk_t* cblk = this->cblk();
2752    int8_t *bufferStart = (int8_t *)mBuffer + (offset-cblk->serverBase)*cblk->frameSize;
2753    int8_t *bufferEnd = bufferStart + frames * cblk->frameSize;
2754
2755    // Check validity of returned pointer in case the track control block would have been corrupted.
2756    if (bufferStart < mBuffer || bufferStart > bufferEnd || bufferEnd > mBufferEnd ||
2757        ((unsigned long)bufferStart & (unsigned long)(cblk->frameSize - 1))) {
2758        LOGE("TrackBase::getBuffer buffer out of range:\n    start: %p, end %p , mBuffer %p mBufferEnd %p\n    \
2759                server %d, serverBase %d, user %d, userBase %d, channelCount %d",
2760                bufferStart, bufferEnd, mBuffer, mBufferEnd,
2761                cblk->server, cblk->serverBase, cblk->user, cblk->userBase, cblk->channelCount);
2762        return 0;
2763    }
2764
2765    return bufferStart;
2766}
2767
2768// ----------------------------------------------------------------------------
2769
2770// Track constructor must be called with AudioFlinger::mLock and ThreadBase::mLock held
2771AudioFlinger::PlaybackThread::Track::Track(
2772            const wp<ThreadBase>& thread,
2773            const sp<Client>& client,
2774            int streamType,
2775            uint32_t sampleRate,
2776            int format,
2777            int channelCount,
2778            int frameCount,
2779            const sp<IMemory>& sharedBuffer,
2780            int sessionId)
2781    :   TrackBase(thread, client, sampleRate, format, channelCount, frameCount, 0, sharedBuffer, sessionId),
2782    mMute(false), mSharedBuffer(sharedBuffer), mName(-1), mMainBuffer(NULL), mAuxBuffer(NULL),
2783    mAuxEffectId(0), mHasVolumeController(false)
2784{
2785    if (mCblk != NULL) {
2786        sp<ThreadBase> baseThread = thread.promote();
2787        if (baseThread != 0) {
2788            PlaybackThread *playbackThread = (PlaybackThread *)baseThread.get();
2789            mName = playbackThread->getTrackName_l();
2790            mMainBuffer = playbackThread->mixBuffer();
2791        }
2792        LOGV("Track constructor name %d, calling thread %d", mName, IPCThreadState::self()->getCallingPid());
2793        if (mName < 0) {
2794            LOGE("no more track names available");
2795        }
2796        mVolume[0] = 1.0f;
2797        mVolume[1] = 1.0f;
2798        mStreamType = streamType;
2799        // NOTE: audio_track_cblk_t::frameSize for 8 bit PCM data is based on a sample size of
2800        // 16 bit because data is converted to 16 bit before being stored in buffer by AudioTrack
2801        mCblk->frameSize = AudioSystem::isLinearPCM(format) ? channelCount * sizeof(int16_t) : sizeof(int8_t);
2802    }
2803}
2804
2805AudioFlinger::PlaybackThread::Track::~Track()
2806{
2807    LOGV("PlaybackThread::Track destructor");
2808    sp<ThreadBase> thread = mThread.promote();
2809    if (thread != 0) {
2810        Mutex::Autolock _l(thread->mLock);
2811        mState = TERMINATED;
2812    }
2813}
2814
2815void AudioFlinger::PlaybackThread::Track::destroy()
2816{
2817    // NOTE: destroyTrack_l() can remove a strong reference to this Track
2818    // by removing it from mTracks vector, so there is a risk that this Tracks's
2819    // desctructor is called. As the destructor needs to lock mLock,
2820    // we must acquire a strong reference on this Track before locking mLock
2821    // here so that the destructor is called only when exiting this function.
2822    // On the other hand, as long as Track::destroy() is only called by
2823    // TrackHandle destructor, the TrackHandle still holds a strong ref on
2824    // this Track with its member mTrack.
2825    sp<Track> keep(this);
2826    { // scope for mLock
2827        sp<ThreadBase> thread = mThread.promote();
2828        if (thread != 0) {
2829            if (!isOutputTrack()) {
2830                if (mState == ACTIVE || mState == RESUMING) {
2831                    AudioSystem::stopOutput(thread->id(),
2832                                            (AudioSystem::stream_type)mStreamType,
2833                                            mSessionId);
2834                }
2835                AudioSystem::releaseOutput(thread->id());
2836            }
2837            Mutex::Autolock _l(thread->mLock);
2838            PlaybackThread *playbackThread = (PlaybackThread *)thread.get();
2839            playbackThread->destroyTrack_l(this);
2840        }
2841    }
2842}
2843
2844void AudioFlinger::PlaybackThread::Track::dump(char* buffer, size_t size)
2845{
2846    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",
2847            mName - AudioMixer::TRACK0,
2848            (mClient == NULL) ? getpid() : mClient->pid(),
2849            mStreamType,
2850            mFormat,
2851            mCblk->channelCount,
2852            mSessionId,
2853            mFrameCount,
2854            mState,
2855            mMute,
2856            mFillingUpStatus,
2857            mCblk->sampleRate,
2858            mCblk->volume[0],
2859            mCblk->volume[1],
2860            mCblk->server,
2861            mCblk->user,
2862            (int)mMainBuffer,
2863            (int)mAuxBuffer);
2864}
2865
2866status_t AudioFlinger::PlaybackThread::Track::getNextBuffer(AudioBufferProvider::Buffer* buffer)
2867{
2868     audio_track_cblk_t* cblk = this->cblk();
2869     uint32_t framesReady;
2870     uint32_t framesReq = buffer->frameCount;
2871
2872     // Check if last stepServer failed, try to step now
2873     if (mFlags & TrackBase::STEPSERVER_FAILED) {
2874         if (!step())  goto getNextBuffer_exit;
2875         LOGV("stepServer recovered");
2876         mFlags &= ~TrackBase::STEPSERVER_FAILED;
2877     }
2878
2879     framesReady = cblk->framesReady();
2880
2881     if (LIKELY(framesReady)) {
2882        uint32_t s = cblk->server;
2883        uint32_t bufferEnd = cblk->serverBase + cblk->frameCount;
2884
2885        bufferEnd = (cblk->loopEnd < bufferEnd) ? cblk->loopEnd : bufferEnd;
2886        if (framesReq > framesReady) {
2887            framesReq = framesReady;
2888        }
2889        if (s + framesReq > bufferEnd) {
2890            framesReq = bufferEnd - s;
2891        }
2892
2893         buffer->raw = getBuffer(s, framesReq);
2894         if (buffer->raw == 0) goto getNextBuffer_exit;
2895
2896         buffer->frameCount = framesReq;
2897        return NO_ERROR;
2898     }
2899
2900getNextBuffer_exit:
2901     buffer->raw = 0;
2902     buffer->frameCount = 0;
2903     LOGV("getNextBuffer() no more data for track %d on thread %p", mName, mThread.unsafe_get());
2904     return NOT_ENOUGH_DATA;
2905}
2906
2907bool AudioFlinger::PlaybackThread::Track::isReady() const {
2908    if (mFillingUpStatus != FS_FILLING || isStopped() || isPausing()) return true;
2909
2910    if (mCblk->framesReady() >= mCblk->frameCount ||
2911            (mCblk->flags & CBLK_FORCEREADY_MSK)) {
2912        mFillingUpStatus = FS_FILLED;
2913        mCblk->flags &= ~CBLK_FORCEREADY_MSK;
2914        return true;
2915    }
2916    return false;
2917}
2918
2919status_t AudioFlinger::PlaybackThread::Track::start()
2920{
2921    status_t status = NO_ERROR;
2922    LOGV("start(%d), calling thread %d session %d",
2923            mName, IPCThreadState::self()->getCallingPid(), mSessionId);
2924    sp<ThreadBase> thread = mThread.promote();
2925    if (thread != 0) {
2926        Mutex::Autolock _l(thread->mLock);
2927        int state = mState;
2928        // here the track could be either new, or restarted
2929        // in both cases "unstop" the track
2930        if (mState == PAUSED) {
2931            mState = TrackBase::RESUMING;
2932            LOGV("PAUSED => RESUMING (%d) on thread %p", mName, this);
2933        } else {
2934            mState = TrackBase::ACTIVE;
2935            LOGV("? => ACTIVE (%d) on thread %p", mName, this);
2936        }
2937
2938        if (!isOutputTrack() && state != ACTIVE && state != RESUMING) {
2939            thread->mLock.unlock();
2940            status = AudioSystem::startOutput(thread->id(),
2941                                              (AudioSystem::stream_type)mStreamType,
2942                                              mSessionId);
2943            thread->mLock.lock();
2944        }
2945        if (status == NO_ERROR) {
2946            PlaybackThread *playbackThread = (PlaybackThread *)thread.get();
2947            playbackThread->addTrack_l(this);
2948        } else {
2949            mState = state;
2950        }
2951    } else {
2952        status = BAD_VALUE;
2953    }
2954    return status;
2955}
2956
2957void AudioFlinger::PlaybackThread::Track::stop()
2958{
2959    LOGV("stop(%d), calling thread %d", mName, IPCThreadState::self()->getCallingPid());
2960    sp<ThreadBase> thread = mThread.promote();
2961    if (thread != 0) {
2962        Mutex::Autolock _l(thread->mLock);
2963        int state = mState;
2964        if (mState > STOPPED) {
2965            mState = STOPPED;
2966            // If the track is not active (PAUSED and buffers full), flush buffers
2967            PlaybackThread *playbackThread = (PlaybackThread *)thread.get();
2968            if (playbackThread->mActiveTracks.indexOf(this) < 0) {
2969                reset();
2970            }
2971            LOGV("(> STOPPED) => STOPPED (%d) on thread %p", mName, playbackThread);
2972        }
2973        if (!isOutputTrack() && (state == ACTIVE || state == RESUMING)) {
2974            thread->mLock.unlock();
2975            AudioSystem::stopOutput(thread->id(),
2976                                    (AudioSystem::stream_type)mStreamType,
2977                                    mSessionId);
2978            thread->mLock.lock();
2979        }
2980    }
2981}
2982
2983void AudioFlinger::PlaybackThread::Track::pause()
2984{
2985    LOGV("pause(%d), calling thread %d", mName, IPCThreadState::self()->getCallingPid());
2986    sp<ThreadBase> thread = mThread.promote();
2987    if (thread != 0) {
2988        Mutex::Autolock _l(thread->mLock);
2989        if (mState == ACTIVE || mState == RESUMING) {
2990            mState = PAUSING;
2991            LOGV("ACTIVE/RESUMING => PAUSING (%d) on thread %p", mName, thread.get());
2992            if (!isOutputTrack()) {
2993                thread->mLock.unlock();
2994                AudioSystem::stopOutput(thread->id(),
2995                                        (AudioSystem::stream_type)mStreamType,
2996                                        mSessionId);
2997                thread->mLock.lock();
2998            }
2999        }
3000    }
3001}
3002
3003void AudioFlinger::PlaybackThread::Track::flush()
3004{
3005    LOGV("flush(%d)", mName);
3006    sp<ThreadBase> thread = mThread.promote();
3007    if (thread != 0) {
3008        Mutex::Autolock _l(thread->mLock);
3009        if (mState != STOPPED && mState != PAUSED && mState != PAUSING) {
3010            return;
3011        }
3012        // No point remaining in PAUSED state after a flush => go to
3013        // STOPPED state
3014        mState = STOPPED;
3015
3016        mCblk->lock.lock();
3017        // NOTE: reset() will reset cblk->user and cblk->server with
3018        // the risk that at the same time, the AudioMixer is trying to read
3019        // data. In this case, getNextBuffer() would return a NULL pointer
3020        // as audio buffer => the AudioMixer code MUST always test that pointer
3021        // returned by getNextBuffer() is not NULL!
3022        reset();
3023        mCblk->lock.unlock();
3024    }
3025}
3026
3027void AudioFlinger::PlaybackThread::Track::reset()
3028{
3029    // Do not reset twice to avoid discarding data written just after a flush and before
3030    // the audioflinger thread detects the track is stopped.
3031    if (!mResetDone) {
3032        TrackBase::reset();
3033        // Force underrun condition to avoid false underrun callback until first data is
3034        // written to buffer
3035        mCblk->flags |= CBLK_UNDERRUN_ON;
3036        mCblk->flags &= ~CBLK_FORCEREADY_MSK;
3037        mFillingUpStatus = FS_FILLING;
3038        mResetDone = true;
3039    }
3040}
3041
3042void AudioFlinger::PlaybackThread::Track::mute(bool muted)
3043{
3044    mMute = muted;
3045}
3046
3047void AudioFlinger::PlaybackThread::Track::setVolume(float left, float right)
3048{
3049    mVolume[0] = left;
3050    mVolume[1] = right;
3051}
3052
3053status_t AudioFlinger::PlaybackThread::Track::attachAuxEffect(int EffectId)
3054{
3055    status_t status = DEAD_OBJECT;
3056    sp<ThreadBase> thread = mThread.promote();
3057    if (thread != 0) {
3058       PlaybackThread *playbackThread = (PlaybackThread *)thread.get();
3059       status = playbackThread->attachAuxEffect(this, EffectId);
3060    }
3061    return status;
3062}
3063
3064void AudioFlinger::PlaybackThread::Track::setAuxBuffer(int EffectId, int32_t *buffer)
3065{
3066    mAuxEffectId = EffectId;
3067    mAuxBuffer = buffer;
3068}
3069
3070// ----------------------------------------------------------------------------
3071
3072// RecordTrack constructor must be called with AudioFlinger::mLock held
3073AudioFlinger::RecordThread::RecordTrack::RecordTrack(
3074            const wp<ThreadBase>& thread,
3075            const sp<Client>& client,
3076            uint32_t sampleRate,
3077            int format,
3078            int channelCount,
3079            int frameCount,
3080            uint32_t flags,
3081            int sessionId)
3082    :   TrackBase(thread, client, sampleRate, format,
3083                  channelCount, frameCount, flags, 0, sessionId),
3084        mOverflow(false)
3085{
3086    if (mCblk != NULL) {
3087       LOGV("RecordTrack constructor, size %d", (int)mBufferEnd - (int)mBuffer);
3088       if (format == AudioSystem::PCM_16_BIT) {
3089           mCblk->frameSize = channelCount * sizeof(int16_t);
3090       } else if (format == AudioSystem::PCM_8_BIT) {
3091           mCblk->frameSize = channelCount * sizeof(int8_t);
3092       } else {
3093           mCblk->frameSize = sizeof(int8_t);
3094       }
3095    }
3096}
3097
3098AudioFlinger::RecordThread::RecordTrack::~RecordTrack()
3099{
3100    sp<ThreadBase> thread = mThread.promote();
3101    if (thread != 0) {
3102        AudioSystem::releaseInput(thread->id());
3103    }
3104}
3105
3106status_t AudioFlinger::RecordThread::RecordTrack::getNextBuffer(AudioBufferProvider::Buffer* buffer)
3107{
3108    audio_track_cblk_t* cblk = this->cblk();
3109    uint32_t framesAvail;
3110    uint32_t framesReq = buffer->frameCount;
3111
3112     // Check if last stepServer failed, try to step now
3113    if (mFlags & TrackBase::STEPSERVER_FAILED) {
3114        if (!step()) goto getNextBuffer_exit;
3115        LOGV("stepServer recovered");
3116        mFlags &= ~TrackBase::STEPSERVER_FAILED;
3117    }
3118
3119    framesAvail = cblk->framesAvailable_l();
3120
3121    if (LIKELY(framesAvail)) {
3122        uint32_t s = cblk->server;
3123        uint32_t bufferEnd = cblk->serverBase + cblk->frameCount;
3124
3125        if (framesReq > framesAvail) {
3126            framesReq = framesAvail;
3127        }
3128        if (s + framesReq > bufferEnd) {
3129            framesReq = bufferEnd - s;
3130        }
3131
3132        buffer->raw = getBuffer(s, framesReq);
3133        if (buffer->raw == 0) goto getNextBuffer_exit;
3134
3135        buffer->frameCount = framesReq;
3136        return NO_ERROR;
3137    }
3138
3139getNextBuffer_exit:
3140    buffer->raw = 0;
3141    buffer->frameCount = 0;
3142    return NOT_ENOUGH_DATA;
3143}
3144
3145status_t AudioFlinger::RecordThread::RecordTrack::start()
3146{
3147    sp<ThreadBase> thread = mThread.promote();
3148    if (thread != 0) {
3149        RecordThread *recordThread = (RecordThread *)thread.get();
3150        return recordThread->start(this);
3151    } else {
3152        return BAD_VALUE;
3153    }
3154}
3155
3156void AudioFlinger::RecordThread::RecordTrack::stop()
3157{
3158    sp<ThreadBase> thread = mThread.promote();
3159    if (thread != 0) {
3160        RecordThread *recordThread = (RecordThread *)thread.get();
3161        recordThread->stop(this);
3162        TrackBase::reset();
3163        // Force overerrun condition to avoid false overrun callback until first data is
3164        // read from buffer
3165        mCblk->flags |= CBLK_UNDERRUN_ON;
3166    }
3167}
3168
3169void AudioFlinger::RecordThread::RecordTrack::dump(char* buffer, size_t size)
3170{
3171    snprintf(buffer, size, "   %05d %03u %03u %05d   %04u %01d %05u  %08x %08x\n",
3172            (mClient == NULL) ? getpid() : mClient->pid(),
3173            mFormat,
3174            mCblk->channelCount,
3175            mSessionId,
3176            mFrameCount,
3177            mState,
3178            mCblk->sampleRate,
3179            mCblk->server,
3180            mCblk->user);
3181}
3182
3183
3184// ----------------------------------------------------------------------------
3185
3186AudioFlinger::PlaybackThread::OutputTrack::OutputTrack(
3187            const wp<ThreadBase>& thread,
3188            DuplicatingThread *sourceThread,
3189            uint32_t sampleRate,
3190            int format,
3191            int channelCount,
3192            int frameCount)
3193    :   Track(thread, NULL, AudioSystem::NUM_STREAM_TYPES, sampleRate, format, channelCount, frameCount, NULL, 0),
3194    mActive(false), mSourceThread(sourceThread)
3195{
3196
3197    PlaybackThread *playbackThread = (PlaybackThread *)thread.unsafe_get();
3198    if (mCblk != NULL) {
3199        mCblk->flags |= CBLK_DIRECTION_OUT;
3200        mCblk->buffers = (char*)mCblk + sizeof(audio_track_cblk_t);
3201        mCblk->volume[0] = mCblk->volume[1] = 0x1000;
3202        mOutBuffer.frameCount = 0;
3203        playbackThread->mTracks.add(this);
3204        LOGV("OutputTrack constructor mCblk %p, mBuffer %p, mCblk->buffers %p, mCblk->frameCount %d, mCblk->sampleRate %d, mCblk->channelCount %d mBufferEnd %p",
3205                mCblk, mBuffer, mCblk->buffers, mCblk->frameCount, mCblk->sampleRate, mCblk->channelCount, mBufferEnd);
3206    } else {
3207        LOGW("Error creating output track on thread %p", playbackThread);
3208    }
3209}
3210
3211AudioFlinger::PlaybackThread::OutputTrack::~OutputTrack()
3212{
3213    clearBufferQueue();
3214}
3215
3216status_t AudioFlinger::PlaybackThread::OutputTrack::start()
3217{
3218    status_t status = Track::start();
3219    if (status != NO_ERROR) {
3220        return status;
3221    }
3222
3223    mActive = true;
3224    mRetryCount = 127;
3225    return status;
3226}
3227
3228void AudioFlinger::PlaybackThread::OutputTrack::stop()
3229{
3230    Track::stop();
3231    clearBufferQueue();
3232    mOutBuffer.frameCount = 0;
3233    mActive = false;
3234}
3235
3236bool AudioFlinger::PlaybackThread::OutputTrack::write(int16_t* data, uint32_t frames)
3237{
3238    Buffer *pInBuffer;
3239    Buffer inBuffer;
3240    uint32_t channelCount = mCblk->channelCount;
3241    bool outputBufferFull = false;
3242    inBuffer.frameCount = frames;
3243    inBuffer.i16 = data;
3244
3245    uint32_t waitTimeLeftMs = mSourceThread->waitTimeMs();
3246
3247    if (!mActive && frames != 0) {
3248        start();
3249        sp<ThreadBase> thread = mThread.promote();
3250        if (thread != 0) {
3251            MixerThread *mixerThread = (MixerThread *)thread.get();
3252            if (mCblk->frameCount > frames){
3253                if (mBufferQueue.size() < kMaxOverFlowBuffers) {
3254                    uint32_t startFrames = (mCblk->frameCount - frames);
3255                    pInBuffer = new Buffer;
3256                    pInBuffer->mBuffer = new int16_t[startFrames * channelCount];
3257                    pInBuffer->frameCount = startFrames;
3258                    pInBuffer->i16 = pInBuffer->mBuffer;
3259                    memset(pInBuffer->raw, 0, startFrames * channelCount * sizeof(int16_t));
3260                    mBufferQueue.add(pInBuffer);
3261                } else {
3262                    LOGW ("OutputTrack::write() %p no more buffers in queue", this);
3263                }
3264            }
3265        }
3266    }
3267
3268    while (waitTimeLeftMs) {
3269        // First write pending buffers, then new data
3270        if (mBufferQueue.size()) {
3271            pInBuffer = mBufferQueue.itemAt(0);
3272        } else {
3273            pInBuffer = &inBuffer;
3274        }
3275
3276        if (pInBuffer->frameCount == 0) {
3277            break;
3278        }
3279
3280        if (mOutBuffer.frameCount == 0) {
3281            mOutBuffer.frameCount = pInBuffer->frameCount;
3282            nsecs_t startTime = systemTime();
3283            if (obtainBuffer(&mOutBuffer, waitTimeLeftMs) == (status_t)AudioTrack::NO_MORE_BUFFERS) {
3284                LOGV ("OutputTrack::write() %p thread %p no more output buffers", this, mThread.unsafe_get());
3285                outputBufferFull = true;
3286                break;
3287            }
3288            uint32_t waitTimeMs = (uint32_t)ns2ms(systemTime() - startTime);
3289            if (waitTimeLeftMs >= waitTimeMs) {
3290                waitTimeLeftMs -= waitTimeMs;
3291            } else {
3292                waitTimeLeftMs = 0;
3293            }
3294        }
3295
3296        uint32_t outFrames = pInBuffer->frameCount > mOutBuffer.frameCount ? mOutBuffer.frameCount : pInBuffer->frameCount;
3297        memcpy(mOutBuffer.raw, pInBuffer->raw, outFrames * channelCount * sizeof(int16_t));
3298        mCblk->stepUser(outFrames);
3299        pInBuffer->frameCount -= outFrames;
3300        pInBuffer->i16 += outFrames * channelCount;
3301        mOutBuffer.frameCount -= outFrames;
3302        mOutBuffer.i16 += outFrames * channelCount;
3303
3304        if (pInBuffer->frameCount == 0) {
3305            if (mBufferQueue.size()) {
3306                mBufferQueue.removeAt(0);
3307                delete [] pInBuffer->mBuffer;
3308                delete pInBuffer;
3309                LOGV("OutputTrack::write() %p thread %p released overflow buffer %d", this, mThread.unsafe_get(), mBufferQueue.size());
3310            } else {
3311                break;
3312            }
3313        }
3314    }
3315
3316    // If we could not write all frames, allocate a buffer and queue it for next time.
3317    if (inBuffer.frameCount) {
3318        sp<ThreadBase> thread = mThread.promote();
3319        if (thread != 0 && !thread->standby()) {
3320            if (mBufferQueue.size() < kMaxOverFlowBuffers) {
3321                pInBuffer = new Buffer;
3322                pInBuffer->mBuffer = new int16_t[inBuffer.frameCount * channelCount];
3323                pInBuffer->frameCount = inBuffer.frameCount;
3324                pInBuffer->i16 = pInBuffer->mBuffer;
3325                memcpy(pInBuffer->raw, inBuffer.raw, inBuffer.frameCount * channelCount * sizeof(int16_t));
3326                mBufferQueue.add(pInBuffer);
3327                LOGV("OutputTrack::write() %p thread %p adding overflow buffer %d", this, mThread.unsafe_get(), mBufferQueue.size());
3328            } else {
3329                LOGW("OutputTrack::write() %p thread %p no more overflow buffers", mThread.unsafe_get(), this);
3330            }
3331        }
3332    }
3333
3334    // Calling write() with a 0 length buffer, means that no more data will be written:
3335    // If no more buffers are pending, fill output track buffer to make sure it is started
3336    // by output mixer.
3337    if (frames == 0 && mBufferQueue.size() == 0) {
3338        if (mCblk->user < mCblk->frameCount) {
3339            frames = mCblk->frameCount - mCblk->user;
3340            pInBuffer = new Buffer;
3341            pInBuffer->mBuffer = new int16_t[frames * channelCount];
3342            pInBuffer->frameCount = frames;
3343            pInBuffer->i16 = pInBuffer->mBuffer;
3344            memset(pInBuffer->raw, 0, frames * channelCount * sizeof(int16_t));
3345            mBufferQueue.add(pInBuffer);
3346        } else if (mActive) {
3347            stop();
3348        }
3349    }
3350
3351    return outputBufferFull;
3352}
3353
3354status_t AudioFlinger::PlaybackThread::OutputTrack::obtainBuffer(AudioBufferProvider::Buffer* buffer, uint32_t waitTimeMs)
3355{
3356    int active;
3357    status_t result;
3358    audio_track_cblk_t* cblk = mCblk;
3359    uint32_t framesReq = buffer->frameCount;
3360
3361//    LOGV("OutputTrack::obtainBuffer user %d, server %d", cblk->user, cblk->server);
3362    buffer->frameCount  = 0;
3363
3364    uint32_t framesAvail = cblk->framesAvailable();
3365
3366
3367    if (framesAvail == 0) {
3368        Mutex::Autolock _l(cblk->lock);
3369        goto start_loop_here;
3370        while (framesAvail == 0) {
3371            active = mActive;
3372            if (UNLIKELY(!active)) {
3373                LOGV("Not active and NO_MORE_BUFFERS");
3374                return AudioTrack::NO_MORE_BUFFERS;
3375            }
3376            result = cblk->cv.waitRelative(cblk->lock, milliseconds(waitTimeMs));
3377            if (result != NO_ERROR) {
3378                return AudioTrack::NO_MORE_BUFFERS;
3379            }
3380            // read the server count again
3381        start_loop_here:
3382            framesAvail = cblk->framesAvailable_l();
3383        }
3384    }
3385
3386//    if (framesAvail < framesReq) {
3387//        return AudioTrack::NO_MORE_BUFFERS;
3388//    }
3389
3390    if (framesReq > framesAvail) {
3391        framesReq = framesAvail;
3392    }
3393
3394    uint32_t u = cblk->user;
3395    uint32_t bufferEnd = cblk->userBase + cblk->frameCount;
3396
3397    if (u + framesReq > bufferEnd) {
3398        framesReq = bufferEnd - u;
3399    }
3400
3401    buffer->frameCount  = framesReq;
3402    buffer->raw         = (void *)cblk->buffer(u);
3403    return NO_ERROR;
3404}
3405
3406
3407void AudioFlinger::PlaybackThread::OutputTrack::clearBufferQueue()
3408{
3409    size_t size = mBufferQueue.size();
3410    Buffer *pBuffer;
3411
3412    for (size_t i = 0; i < size; i++) {
3413        pBuffer = mBufferQueue.itemAt(i);
3414        delete [] pBuffer->mBuffer;
3415        delete pBuffer;
3416    }
3417    mBufferQueue.clear();
3418}
3419
3420// ----------------------------------------------------------------------------
3421
3422AudioFlinger::Client::Client(const sp<AudioFlinger>& audioFlinger, pid_t pid)
3423    :   RefBase(),
3424        mAudioFlinger(audioFlinger),
3425        mMemoryDealer(new MemoryDealer(1024*1024, "AudioFlinger::Client")),
3426        mPid(pid)
3427{
3428    // 1 MB of address space is good for 32 tracks, 8 buffers each, 4 KB/buffer
3429}
3430
3431// Client destructor must be called with AudioFlinger::mLock held
3432AudioFlinger::Client::~Client()
3433{
3434    mAudioFlinger->removeClient_l(mPid);
3435}
3436
3437const sp<MemoryDealer>& AudioFlinger::Client::heap() const
3438{
3439    return mMemoryDealer;
3440}
3441
3442// ----------------------------------------------------------------------------
3443
3444AudioFlinger::NotificationClient::NotificationClient(const sp<AudioFlinger>& audioFlinger,
3445                                                     const sp<IAudioFlingerClient>& client,
3446                                                     pid_t pid)
3447    : mAudioFlinger(audioFlinger), mPid(pid), mClient(client)
3448{
3449}
3450
3451AudioFlinger::NotificationClient::~NotificationClient()
3452{
3453    mClient.clear();
3454}
3455
3456void AudioFlinger::NotificationClient::binderDied(const wp<IBinder>& who)
3457{
3458    sp<NotificationClient> keep(this);
3459    {
3460        mAudioFlinger->removeNotificationClient(mPid);
3461    }
3462}
3463
3464// ----------------------------------------------------------------------------
3465
3466AudioFlinger::TrackHandle::TrackHandle(const sp<AudioFlinger::PlaybackThread::Track>& track)
3467    : BnAudioTrack(),
3468      mTrack(track)
3469{
3470}
3471
3472AudioFlinger::TrackHandle::~TrackHandle() {
3473    // just stop the track on deletion, associated resources
3474    // will be freed from the main thread once all pending buffers have
3475    // been played. Unless it's not in the active track list, in which
3476    // case we free everything now...
3477    mTrack->destroy();
3478}
3479
3480status_t AudioFlinger::TrackHandle::start() {
3481    return mTrack->start();
3482}
3483
3484void AudioFlinger::TrackHandle::stop() {
3485    mTrack->stop();
3486}
3487
3488void AudioFlinger::TrackHandle::flush() {
3489    mTrack->flush();
3490}
3491
3492void AudioFlinger::TrackHandle::mute(bool e) {
3493    mTrack->mute(e);
3494}
3495
3496void AudioFlinger::TrackHandle::pause() {
3497    mTrack->pause();
3498}
3499
3500void AudioFlinger::TrackHandle::setVolume(float left, float right) {
3501    mTrack->setVolume(left, right);
3502}
3503
3504sp<IMemory> AudioFlinger::TrackHandle::getCblk() const {
3505    return mTrack->getCblk();
3506}
3507
3508status_t AudioFlinger::TrackHandle::attachAuxEffect(int EffectId)
3509{
3510    return mTrack->attachAuxEffect(EffectId);
3511}
3512
3513status_t AudioFlinger::TrackHandle::onTransact(
3514    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
3515{
3516    return BnAudioTrack::onTransact(code, data, reply, flags);
3517}
3518
3519// ----------------------------------------------------------------------------
3520
3521sp<IAudioRecord> AudioFlinger::openRecord(
3522        pid_t pid,
3523        int input,
3524        uint32_t sampleRate,
3525        int format,
3526        int channelCount,
3527        int frameCount,
3528        uint32_t flags,
3529        int *sessionId,
3530        status_t *status)
3531{
3532    sp<RecordThread::RecordTrack> recordTrack;
3533    sp<RecordHandle> recordHandle;
3534    sp<Client> client;
3535    wp<Client> wclient;
3536    status_t lStatus;
3537    RecordThread *thread;
3538    size_t inFrameCount;
3539    int lSessionId;
3540
3541    // check calling permissions
3542    if (!recordingAllowed()) {
3543        lStatus = PERMISSION_DENIED;
3544        goto Exit;
3545    }
3546
3547    // add client to list
3548    { // scope for mLock
3549        Mutex::Autolock _l(mLock);
3550        thread = checkRecordThread_l(input);
3551        if (thread == NULL) {
3552            lStatus = BAD_VALUE;
3553            goto Exit;
3554        }
3555
3556        wclient = mClients.valueFor(pid);
3557        if (wclient != NULL) {
3558            client = wclient.promote();
3559        } else {
3560            client = new Client(this, pid);
3561            mClients.add(pid, client);
3562        }
3563
3564        // If no audio session id is provided, create one here
3565        if (sessionId != NULL && *sessionId != AudioSystem::SESSION_OUTPUT_MIX) {
3566            lSessionId = *sessionId;
3567        } else {
3568            lSessionId = nextUniqueId_l();
3569            if (sessionId != NULL) {
3570                *sessionId = lSessionId;
3571            }
3572        }
3573        // create new record track. The record track uses one track in mHardwareMixerThread by convention.
3574        recordTrack = new RecordThread::RecordTrack(thread, client, sampleRate,
3575                                                   format, channelCount, frameCount, flags, lSessionId);
3576    }
3577    if (recordTrack->getCblk() == NULL) {
3578        // remove local strong reference to Client before deleting the RecordTrack so that the Client
3579        // destructor is called by the TrackBase destructor with mLock held
3580        client.clear();
3581        recordTrack.clear();
3582        lStatus = NO_MEMORY;
3583        goto Exit;
3584    }
3585
3586    // return to handle to client
3587    recordHandle = new RecordHandle(recordTrack);
3588    lStatus = NO_ERROR;
3589
3590Exit:
3591    if (status) {
3592        *status = lStatus;
3593    }
3594    return recordHandle;
3595}
3596
3597// ----------------------------------------------------------------------------
3598
3599AudioFlinger::RecordHandle::RecordHandle(const sp<AudioFlinger::RecordThread::RecordTrack>& recordTrack)
3600    : BnAudioRecord(),
3601    mRecordTrack(recordTrack)
3602{
3603}
3604
3605AudioFlinger::RecordHandle::~RecordHandle() {
3606    stop();
3607}
3608
3609status_t AudioFlinger::RecordHandle::start() {
3610    LOGV("RecordHandle::start()");
3611    return mRecordTrack->start();
3612}
3613
3614void AudioFlinger::RecordHandle::stop() {
3615    LOGV("RecordHandle::stop()");
3616    mRecordTrack->stop();
3617}
3618
3619sp<IMemory> AudioFlinger::RecordHandle::getCblk() const {
3620    return mRecordTrack->getCblk();
3621}
3622
3623status_t AudioFlinger::RecordHandle::onTransact(
3624    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
3625{
3626    return BnAudioRecord::onTransact(code, data, reply, flags);
3627}
3628
3629// ----------------------------------------------------------------------------
3630
3631AudioFlinger::RecordThread::RecordThread(const sp<AudioFlinger>& audioFlinger, AudioStreamIn *input, uint32_t sampleRate, uint32_t channels, int id) :
3632    ThreadBase(audioFlinger, id),
3633    mInput(input), mResampler(0), mRsmpOutBuffer(0), mRsmpInBuffer(0)
3634{
3635    mReqChannelCount = AudioSystem::popCount(channels);
3636    mReqSampleRate = sampleRate;
3637    readInputParameters();
3638}
3639
3640
3641AudioFlinger::RecordThread::~RecordThread()
3642{
3643    delete[] mRsmpInBuffer;
3644    if (mResampler != 0) {
3645        delete mResampler;
3646        delete[] mRsmpOutBuffer;
3647    }
3648}
3649
3650void AudioFlinger::RecordThread::onFirstRef()
3651{
3652    const size_t SIZE = 256;
3653    char buffer[SIZE];
3654
3655    snprintf(buffer, SIZE, "Record Thread %p", this);
3656
3657    run(buffer, PRIORITY_URGENT_AUDIO);
3658}
3659
3660bool AudioFlinger::RecordThread::threadLoop()
3661{
3662    AudioBufferProvider::Buffer buffer;
3663    sp<RecordTrack> activeTrack;
3664
3665    nsecs_t lastWarning = 0;
3666
3667    // start recording
3668    while (!exitPending()) {
3669
3670        processConfigEvents();
3671
3672        { // scope for mLock
3673            Mutex::Autolock _l(mLock);
3674            checkForNewParameters_l();
3675            if (mActiveTrack == 0 && mConfigEvents.isEmpty()) {
3676                if (!mStandby) {
3677                    mInput->standby();
3678                    mStandby = true;
3679                }
3680
3681                if (exitPending()) break;
3682
3683                LOGV("RecordThread: loop stopping");
3684                // go to sleep
3685                mWaitWorkCV.wait(mLock);
3686                LOGV("RecordThread: loop starting");
3687                continue;
3688            }
3689            if (mActiveTrack != 0) {
3690                if (mActiveTrack->mState == TrackBase::PAUSING) {
3691                    if (!mStandby) {
3692                        mInput->standby();
3693                        mStandby = true;
3694                    }
3695                    mActiveTrack.clear();
3696                    mStartStopCond.broadcast();
3697                } else if (mActiveTrack->mState == TrackBase::RESUMING) {
3698                    if (mReqChannelCount != mActiveTrack->channelCount()) {
3699                        mActiveTrack.clear();
3700                        mStartStopCond.broadcast();
3701                    } else if (mBytesRead != 0) {
3702                        // record start succeeds only if first read from audio input
3703                        // succeeds
3704                        if (mBytesRead > 0) {
3705                            mActiveTrack->mState = TrackBase::ACTIVE;
3706                        } else {
3707                            mActiveTrack.clear();
3708                        }
3709                        mStartStopCond.broadcast();
3710                    }
3711                    mStandby = false;
3712                }
3713            }
3714        }
3715
3716        if (mActiveTrack != 0) {
3717            if (mActiveTrack->mState != TrackBase::ACTIVE &&
3718                mActiveTrack->mState != TrackBase::RESUMING) {
3719                usleep(5000);
3720                continue;
3721            }
3722            buffer.frameCount = mFrameCount;
3723            if (LIKELY(mActiveTrack->getNextBuffer(&buffer) == NO_ERROR)) {
3724                size_t framesOut = buffer.frameCount;
3725                if (mResampler == 0) {
3726                    // no resampling
3727                    while (framesOut) {
3728                        size_t framesIn = mFrameCount - mRsmpInIndex;
3729                        if (framesIn) {
3730                            int8_t *src = (int8_t *)mRsmpInBuffer + mRsmpInIndex * mFrameSize;
3731                            int8_t *dst = buffer.i8 + (buffer.frameCount - framesOut) * mActiveTrack->mCblk->frameSize;
3732                            if (framesIn > framesOut)
3733                                framesIn = framesOut;
3734                            mRsmpInIndex += framesIn;
3735                            framesOut -= framesIn;
3736                            if ((int)mChannelCount == mReqChannelCount ||
3737                                mFormat != AudioSystem::PCM_16_BIT) {
3738                                memcpy(dst, src, framesIn * mFrameSize);
3739                            } else {
3740                                int16_t *src16 = (int16_t *)src;
3741                                int16_t *dst16 = (int16_t *)dst;
3742                                if (mChannelCount == 1) {
3743                                    while (framesIn--) {
3744                                        *dst16++ = *src16;
3745                                        *dst16++ = *src16++;
3746                                    }
3747                                } else {
3748                                    while (framesIn--) {
3749                                        *dst16++ = (int16_t)(((int32_t)*src16 + (int32_t)*(src16 + 1)) >> 1);
3750                                        src16 += 2;
3751                                    }
3752                                }
3753                            }
3754                        }
3755                        if (framesOut && mFrameCount == mRsmpInIndex) {
3756                            if (framesOut == mFrameCount &&
3757                                ((int)mChannelCount == mReqChannelCount || mFormat != AudioSystem::PCM_16_BIT)) {
3758                                mBytesRead = mInput->read(buffer.raw, mInputBytes);
3759                                framesOut = 0;
3760                            } else {
3761                                mBytesRead = mInput->read(mRsmpInBuffer, mInputBytes);
3762                                mRsmpInIndex = 0;
3763                            }
3764                            if (mBytesRead < 0) {
3765                                LOGE("Error reading audio input");
3766                                if (mActiveTrack->mState == TrackBase::ACTIVE) {
3767                                    // Force input into standby so that it tries to
3768                                    // recover at next read attempt
3769                                    mInput->standby();
3770                                    usleep(5000);
3771                                }
3772                                mRsmpInIndex = mFrameCount;
3773                                framesOut = 0;
3774                                buffer.frameCount = 0;
3775                            }
3776                        }
3777                    }
3778                } else {
3779                    // resampling
3780
3781                    memset(mRsmpOutBuffer, 0, framesOut * 2 * sizeof(int32_t));
3782                    // alter output frame count as if we were expecting stereo samples
3783                    if (mChannelCount == 1 && mReqChannelCount == 1) {
3784                        framesOut >>= 1;
3785                    }
3786                    mResampler->resample(mRsmpOutBuffer, framesOut, this);
3787                    // ditherAndClamp() works as long as all buffers returned by mActiveTrack->getNextBuffer()
3788                    // are 32 bit aligned which should be always true.
3789                    if (mChannelCount == 2 && mReqChannelCount == 1) {
3790                        AudioMixer::ditherAndClamp(mRsmpOutBuffer, mRsmpOutBuffer, framesOut);
3791                        // the resampler always outputs stereo samples: do post stereo to mono conversion
3792                        int16_t *src = (int16_t *)mRsmpOutBuffer;
3793                        int16_t *dst = buffer.i16;
3794                        while (framesOut--) {
3795                            *dst++ = (int16_t)(((int32_t)*src + (int32_t)*(src + 1)) >> 1);
3796                            src += 2;
3797                        }
3798                    } else {
3799                        AudioMixer::ditherAndClamp((int32_t *)buffer.raw, mRsmpOutBuffer, framesOut);
3800                    }
3801
3802                }
3803                mActiveTrack->releaseBuffer(&buffer);
3804                mActiveTrack->overflow();
3805            }
3806            // client isn't retrieving buffers fast enough
3807            else {
3808                if (!mActiveTrack->setOverflow()) {
3809                    nsecs_t now = systemTime();
3810                    if ((now - lastWarning) > kWarningThrottle) {
3811                        LOGW("RecordThread: buffer overflow");
3812                        lastWarning = now;
3813                    }
3814                }
3815                // Release the processor for a while before asking for a new buffer.
3816                // This will give the application more chance to read from the buffer and
3817                // clear the overflow.
3818                usleep(5000);
3819            }
3820        }
3821    }
3822
3823    if (!mStandby) {
3824        mInput->standby();
3825    }
3826    mActiveTrack.clear();
3827
3828    mStartStopCond.broadcast();
3829
3830    LOGV("RecordThread %p exiting", this);
3831    return false;
3832}
3833
3834status_t AudioFlinger::RecordThread::start(RecordThread::RecordTrack* recordTrack)
3835{
3836    LOGV("RecordThread::start");
3837    sp <ThreadBase> strongMe = this;
3838    status_t status = NO_ERROR;
3839    {
3840        AutoMutex lock(&mLock);
3841        if (mActiveTrack != 0) {
3842            if (recordTrack != mActiveTrack.get()) {
3843                status = -EBUSY;
3844            } else if (mActiveTrack->mState == TrackBase::PAUSING) {
3845                mActiveTrack->mState = TrackBase::ACTIVE;
3846            }
3847            return status;
3848        }
3849
3850        recordTrack->mState = TrackBase::IDLE;
3851        mActiveTrack = recordTrack;
3852        mLock.unlock();
3853        status_t status = AudioSystem::startInput(mId);
3854        mLock.lock();
3855        if (status != NO_ERROR) {
3856            mActiveTrack.clear();
3857            return status;
3858        }
3859        mRsmpInIndex = mFrameCount;
3860        mBytesRead = 0;
3861        if (mResampler != NULL) {
3862            mResampler->reset();
3863        }
3864        mActiveTrack->mState = TrackBase::RESUMING;
3865        // signal thread to start
3866        LOGV("Signal record thread");
3867        mWaitWorkCV.signal();
3868        // do not wait for mStartStopCond if exiting
3869        if (mExiting) {
3870            mActiveTrack.clear();
3871            status = INVALID_OPERATION;
3872            goto startError;
3873        }
3874        mStartStopCond.wait(mLock);
3875        if (mActiveTrack == 0) {
3876            LOGV("Record failed to start");
3877            status = BAD_VALUE;
3878            goto startError;
3879        }
3880        LOGV("Record started OK");
3881        return status;
3882    }
3883startError:
3884    AudioSystem::stopInput(mId);
3885    return status;
3886}
3887
3888void AudioFlinger::RecordThread::stop(RecordThread::RecordTrack* recordTrack) {
3889    LOGV("RecordThread::stop");
3890    sp <ThreadBase> strongMe = this;
3891    {
3892        AutoMutex lock(&mLock);
3893        if (mActiveTrack != 0 && recordTrack == mActiveTrack.get()) {
3894            mActiveTrack->mState = TrackBase::PAUSING;
3895            // do not wait for mStartStopCond if exiting
3896            if (mExiting) {
3897                return;
3898            }
3899            mStartStopCond.wait(mLock);
3900            // if we have been restarted, recordTrack == mActiveTrack.get() here
3901            if (mActiveTrack == 0 || recordTrack != mActiveTrack.get()) {
3902                mLock.unlock();
3903                AudioSystem::stopInput(mId);
3904                mLock.lock();
3905                LOGV("Record stopped OK");
3906            }
3907        }
3908    }
3909}
3910
3911status_t AudioFlinger::RecordThread::dump(int fd, const Vector<String16>& args)
3912{
3913    const size_t SIZE = 256;
3914    char buffer[SIZE];
3915    String8 result;
3916    pid_t pid = 0;
3917
3918    snprintf(buffer, SIZE, "\nInput thread %p internals\n", this);
3919    result.append(buffer);
3920
3921    if (mActiveTrack != 0) {
3922        result.append("Active Track:\n");
3923        result.append("   Clien Fmt Chn Session Buf  S SRate  Serv     User\n");
3924        mActiveTrack->dump(buffer, SIZE);
3925        result.append(buffer);
3926
3927        snprintf(buffer, SIZE, "In index: %d\n", mRsmpInIndex);
3928        result.append(buffer);
3929        snprintf(buffer, SIZE, "In size: %d\n", mInputBytes);
3930        result.append(buffer);
3931        snprintf(buffer, SIZE, "Resampling: %d\n", (mResampler != 0));
3932        result.append(buffer);
3933        snprintf(buffer, SIZE, "Out channel count: %d\n", mReqChannelCount);
3934        result.append(buffer);
3935        snprintf(buffer, SIZE, "Out sample rate: %d\n", mReqSampleRate);
3936        result.append(buffer);
3937
3938
3939    } else {
3940        result.append("No record client\n");
3941    }
3942    write(fd, result.string(), result.size());
3943
3944    dumpBase(fd, args);
3945
3946    return NO_ERROR;
3947}
3948
3949status_t AudioFlinger::RecordThread::getNextBuffer(AudioBufferProvider::Buffer* buffer)
3950{
3951    size_t framesReq = buffer->frameCount;
3952    size_t framesReady = mFrameCount - mRsmpInIndex;
3953    int channelCount;
3954
3955    if (framesReady == 0) {
3956        mBytesRead = mInput->read(mRsmpInBuffer, mInputBytes);
3957        if (mBytesRead < 0) {
3958            LOGE("RecordThread::getNextBuffer() Error reading audio input");
3959            if (mActiveTrack->mState == TrackBase::ACTIVE) {
3960                // Force input into standby so that it tries to
3961                // recover at next read attempt
3962                mInput->standby();
3963                usleep(5000);
3964            }
3965            buffer->raw = 0;
3966            buffer->frameCount = 0;
3967            return NOT_ENOUGH_DATA;
3968        }
3969        mRsmpInIndex = 0;
3970        framesReady = mFrameCount;
3971    }
3972
3973    if (framesReq > framesReady) {
3974        framesReq = framesReady;
3975    }
3976
3977    if (mChannelCount == 1 && mReqChannelCount == 2) {
3978        channelCount = 1;
3979    } else {
3980        channelCount = 2;
3981    }
3982    buffer->raw = mRsmpInBuffer + mRsmpInIndex * channelCount;
3983    buffer->frameCount = framesReq;
3984    return NO_ERROR;
3985}
3986
3987void AudioFlinger::RecordThread::releaseBuffer(AudioBufferProvider::Buffer* buffer)
3988{
3989    mRsmpInIndex += buffer->frameCount;
3990    buffer->frameCount = 0;
3991}
3992
3993bool AudioFlinger::RecordThread::checkForNewParameters_l()
3994{
3995    bool reconfig = false;
3996
3997    while (!mNewParameters.isEmpty()) {
3998        status_t status = NO_ERROR;
3999        String8 keyValuePair = mNewParameters[0];
4000        AudioParameter param = AudioParameter(keyValuePair);
4001        int value;
4002        int reqFormat = mFormat;
4003        int reqSamplingRate = mReqSampleRate;
4004        int reqChannelCount = mReqChannelCount;
4005
4006        if (param.getInt(String8(AudioParameter::keySamplingRate), value) == NO_ERROR) {
4007            reqSamplingRate = value;
4008            reconfig = true;
4009        }
4010        if (param.getInt(String8(AudioParameter::keyFormat), value) == NO_ERROR) {
4011            reqFormat = value;
4012            reconfig = true;
4013        }
4014        if (param.getInt(String8(AudioParameter::keyChannels), value) == NO_ERROR) {
4015            reqChannelCount = AudioSystem::popCount(value);
4016            reconfig = true;
4017        }
4018        if (param.getInt(String8(AudioParameter::keyFrameCount), value) == NO_ERROR) {
4019            // do not accept frame count changes if tracks are open as the track buffer
4020            // size depends on frame count and correct behavior would not be garantied
4021            // if frame count is changed after track creation
4022            if (mActiveTrack != 0) {
4023                status = INVALID_OPERATION;
4024            } else {
4025                reconfig = true;
4026            }
4027        }
4028        if (status == NO_ERROR) {
4029            status = mInput->setParameters(keyValuePair);
4030            if (status == INVALID_OPERATION) {
4031               mInput->standby();
4032               status = mInput->setParameters(keyValuePair);
4033            }
4034            if (reconfig) {
4035                if (status == BAD_VALUE &&
4036                    reqFormat == mInput->format() && reqFormat == AudioSystem::PCM_16_BIT &&
4037                    ((int)mInput->sampleRate() <= 2 * reqSamplingRate) &&
4038                    (AudioSystem::popCount(mInput->channels()) < 3) && (reqChannelCount < 3)) {
4039                    status = NO_ERROR;
4040                }
4041                if (status == NO_ERROR) {
4042                    readInputParameters();
4043                    sendConfigEvent_l(AudioSystem::INPUT_CONFIG_CHANGED);
4044                }
4045            }
4046        }
4047
4048        mNewParameters.removeAt(0);
4049
4050        mParamStatus = status;
4051        mParamCond.signal();
4052        mWaitWorkCV.wait(mLock);
4053    }
4054    return reconfig;
4055}
4056
4057String8 AudioFlinger::RecordThread::getParameters(const String8& keys)
4058{
4059    return mInput->getParameters(keys);
4060}
4061
4062void AudioFlinger::RecordThread::audioConfigChanged_l(int event, int param) {
4063    AudioSystem::OutputDescriptor desc;
4064    void *param2 = 0;
4065
4066    switch (event) {
4067    case AudioSystem::INPUT_OPENED:
4068    case AudioSystem::INPUT_CONFIG_CHANGED:
4069        desc.channels = mChannels;
4070        desc.samplingRate = mSampleRate;
4071        desc.format = mFormat;
4072        desc.frameCount = mFrameCount;
4073        desc.latency = 0;
4074        param2 = &desc;
4075        break;
4076
4077    case AudioSystem::INPUT_CLOSED:
4078    default:
4079        break;
4080    }
4081    mAudioFlinger->audioConfigChanged_l(event, mId, param2);
4082}
4083
4084void AudioFlinger::RecordThread::readInputParameters()
4085{
4086    if (mRsmpInBuffer) delete mRsmpInBuffer;
4087    if (mRsmpOutBuffer) delete mRsmpOutBuffer;
4088    if (mResampler) delete mResampler;
4089    mResampler = 0;
4090
4091    mSampleRate = mInput->sampleRate();
4092    mChannels = mInput->channels();
4093    mChannelCount = (uint16_t)AudioSystem::popCount(mChannels);
4094    mFormat = mInput->format();
4095    mFrameSize = (uint16_t)mInput->frameSize();
4096    mInputBytes = mInput->bufferSize();
4097    mFrameCount = mInputBytes / mFrameSize;
4098    mRsmpInBuffer = new int16_t[mFrameCount * mChannelCount];
4099
4100    if (mSampleRate != mReqSampleRate && mChannelCount < 3 && mReqChannelCount < 3)
4101    {
4102        int channelCount;
4103         // optmization: if mono to mono, use the resampler in stereo to stereo mode to avoid
4104         // stereo to mono post process as the resampler always outputs stereo.
4105        if (mChannelCount == 1 && mReqChannelCount == 2) {
4106            channelCount = 1;
4107        } else {
4108            channelCount = 2;
4109        }
4110        mResampler = AudioResampler::create(16, channelCount, mReqSampleRate);
4111        mResampler->setSampleRate(mSampleRate);
4112        mResampler->setVolume(AudioMixer::UNITY_GAIN, AudioMixer::UNITY_GAIN);
4113        mRsmpOutBuffer = new int32_t[mFrameCount * 2];
4114
4115        // optmization: if mono to mono, alter input frame count as if we were inputing stereo samples
4116        if (mChannelCount == 1 && mReqChannelCount == 1) {
4117            mFrameCount >>= 1;
4118        }
4119
4120    }
4121    mRsmpInIndex = mFrameCount;
4122}
4123
4124unsigned int AudioFlinger::RecordThread::getInputFramesLost()
4125{
4126    return mInput->getInputFramesLost();
4127}
4128
4129// ----------------------------------------------------------------------------
4130
4131int AudioFlinger::openOutput(uint32_t *pDevices,
4132                                uint32_t *pSamplingRate,
4133                                uint32_t *pFormat,
4134                                uint32_t *pChannels,
4135                                uint32_t *pLatencyMs,
4136                                uint32_t flags)
4137{
4138    status_t status;
4139    PlaybackThread *thread = NULL;
4140    mHardwareStatus = AUDIO_HW_OUTPUT_OPEN;
4141    uint32_t samplingRate = pSamplingRate ? *pSamplingRate : 0;
4142    uint32_t format = pFormat ? *pFormat : 0;
4143    uint32_t channels = pChannels ? *pChannels : 0;
4144    uint32_t latency = pLatencyMs ? *pLatencyMs : 0;
4145
4146    LOGV("openOutput(), Device %x, SamplingRate %d, Format %d, Channels %x, flags %x",
4147            pDevices ? *pDevices : 0,
4148            samplingRate,
4149            format,
4150            channels,
4151            flags);
4152
4153    if (pDevices == NULL || *pDevices == 0) {
4154        return 0;
4155    }
4156    Mutex::Autolock _l(mLock);
4157
4158    AudioStreamOut *output = mAudioHardware->openOutputStream(*pDevices,
4159                                                             (int *)&format,
4160                                                             &channels,
4161                                                             &samplingRate,
4162                                                             &status);
4163    LOGV("openOutput() openOutputStream returned output %p, SamplingRate %d, Format %d, Channels %x, status %d",
4164            output,
4165            samplingRate,
4166            format,
4167            channels,
4168            status);
4169
4170    mHardwareStatus = AUDIO_HW_IDLE;
4171    if (output != 0) {
4172        int id = nextUniqueId_l();
4173        if ((flags & AudioSystem::OUTPUT_FLAG_DIRECT) ||
4174            (format != AudioSystem::PCM_16_BIT) ||
4175            (channels != AudioSystem::CHANNEL_OUT_STEREO)) {
4176            thread = new DirectOutputThread(this, output, id, *pDevices);
4177            LOGV("openOutput() created direct output: ID %d thread %p", id, thread);
4178        } else {
4179            thread = new MixerThread(this, output, id, *pDevices);
4180            LOGV("openOutput() created mixer output: ID %d thread %p", id, thread);
4181        }
4182        mPlaybackThreads.add(id, thread);
4183
4184        if (pSamplingRate) *pSamplingRate = samplingRate;
4185        if (pFormat) *pFormat = format;
4186        if (pChannels) *pChannels = channels;
4187        if (pLatencyMs) *pLatencyMs = thread->latency();
4188
4189        // notify client processes of the new output creation
4190        thread->audioConfigChanged_l(AudioSystem::OUTPUT_OPENED);
4191        return id;
4192    }
4193
4194    return 0;
4195}
4196
4197int AudioFlinger::openDuplicateOutput(int output1, int output2)
4198{
4199    Mutex::Autolock _l(mLock);
4200    MixerThread *thread1 = checkMixerThread_l(output1);
4201    MixerThread *thread2 = checkMixerThread_l(output2);
4202
4203    if (thread1 == NULL || thread2 == NULL) {
4204        LOGW("openDuplicateOutput() wrong output mixer type for output %d or %d", output1, output2);
4205        return 0;
4206    }
4207
4208    int id = nextUniqueId_l();
4209    DuplicatingThread *thread = new DuplicatingThread(this, thread1, id);
4210    thread->addOutputTrack(thread2);
4211    mPlaybackThreads.add(id, thread);
4212    // notify client processes of the new output creation
4213    thread->audioConfigChanged_l(AudioSystem::OUTPUT_OPENED);
4214    return id;
4215}
4216
4217status_t AudioFlinger::closeOutput(int output)
4218{
4219    // keep strong reference on the playback thread so that
4220    // it is not destroyed while exit() is executed
4221    sp <PlaybackThread> thread;
4222    {
4223        Mutex::Autolock _l(mLock);
4224        thread = checkPlaybackThread_l(output);
4225        if (thread == NULL) {
4226            return BAD_VALUE;
4227        }
4228
4229        LOGV("closeOutput() %d", output);
4230
4231        if (thread->type() == PlaybackThread::MIXER) {
4232            for (size_t i = 0; i < mPlaybackThreads.size(); i++) {
4233                if (mPlaybackThreads.valueAt(i)->type() == PlaybackThread::DUPLICATING) {
4234                    DuplicatingThread *dupThread = (DuplicatingThread *)mPlaybackThreads.valueAt(i).get();
4235                    dupThread->removeOutputTrack((MixerThread *)thread.get());
4236                }
4237            }
4238        }
4239        void *param2 = 0;
4240        audioConfigChanged_l(AudioSystem::OUTPUT_CLOSED, output, param2);
4241        mPlaybackThreads.removeItem(output);
4242    }
4243    thread->exit();
4244
4245    if (thread->type() != PlaybackThread::DUPLICATING) {
4246        mAudioHardware->closeOutputStream(thread->getOutput());
4247    }
4248    return NO_ERROR;
4249}
4250
4251status_t AudioFlinger::suspendOutput(int output)
4252{
4253    Mutex::Autolock _l(mLock);
4254    PlaybackThread *thread = checkPlaybackThread_l(output);
4255
4256    if (thread == NULL) {
4257        return BAD_VALUE;
4258    }
4259
4260    LOGV("suspendOutput() %d", output);
4261    thread->suspend();
4262
4263    return NO_ERROR;
4264}
4265
4266status_t AudioFlinger::restoreOutput(int output)
4267{
4268    Mutex::Autolock _l(mLock);
4269    PlaybackThread *thread = checkPlaybackThread_l(output);
4270
4271    if (thread == NULL) {
4272        return BAD_VALUE;
4273    }
4274
4275    LOGV("restoreOutput() %d", output);
4276
4277    thread->restore();
4278
4279    return NO_ERROR;
4280}
4281
4282int AudioFlinger::openInput(uint32_t *pDevices,
4283                                uint32_t *pSamplingRate,
4284                                uint32_t *pFormat,
4285                                uint32_t *pChannels,
4286                                uint32_t acoustics)
4287{
4288    status_t status;
4289    RecordThread *thread = NULL;
4290    uint32_t samplingRate = pSamplingRate ? *pSamplingRate : 0;
4291    uint32_t format = pFormat ? *pFormat : 0;
4292    uint32_t channels = pChannels ? *pChannels : 0;
4293    uint32_t reqSamplingRate = samplingRate;
4294    uint32_t reqFormat = format;
4295    uint32_t reqChannels = channels;
4296
4297    if (pDevices == NULL || *pDevices == 0) {
4298        return 0;
4299    }
4300    Mutex::Autolock _l(mLock);
4301
4302    AudioStreamIn *input = mAudioHardware->openInputStream(*pDevices,
4303                                                             (int *)&format,
4304                                                             &channels,
4305                                                             &samplingRate,
4306                                                             &status,
4307                                                             (AudioSystem::audio_in_acoustics)acoustics);
4308    LOGV("openInput() openInputStream returned input %p, SamplingRate %d, Format %d, Channels %x, acoustics %x, status %d",
4309            input,
4310            samplingRate,
4311            format,
4312            channels,
4313            acoustics,
4314            status);
4315
4316    // If the input could not be opened with the requested parameters and we can handle the conversion internally,
4317    // try to open again with the proposed parameters. The AudioFlinger can resample the input and do mono to stereo
4318    // or stereo to mono conversions on 16 bit PCM inputs.
4319    if (input == 0 && status == BAD_VALUE &&
4320        reqFormat == format && format == AudioSystem::PCM_16_BIT &&
4321        (samplingRate <= 2 * reqSamplingRate) &&
4322        (AudioSystem::popCount(channels) < 3) && (AudioSystem::popCount(reqChannels) < 3)) {
4323        LOGV("openInput() reopening with proposed sampling rate and channels");
4324        input = mAudioHardware->openInputStream(*pDevices,
4325                                                 (int *)&format,
4326                                                 &channels,
4327                                                 &samplingRate,
4328                                                 &status,
4329                                                 (AudioSystem::audio_in_acoustics)acoustics);
4330    }
4331
4332    if (input != 0) {
4333        int id = nextUniqueId_l();
4334         // Start record thread
4335        thread = new RecordThread(this, input, reqSamplingRate, reqChannels, id);
4336        mRecordThreads.add(id, thread);
4337        LOGV("openInput() created record thread: ID %d thread %p", id, thread);
4338        if (pSamplingRate) *pSamplingRate = reqSamplingRate;
4339        if (pFormat) *pFormat = format;
4340        if (pChannels) *pChannels = reqChannels;
4341
4342        input->standby();
4343
4344        // notify client processes of the new input creation
4345        thread->audioConfigChanged_l(AudioSystem::INPUT_OPENED);
4346        return id;
4347    }
4348
4349    return 0;
4350}
4351
4352status_t AudioFlinger::closeInput(int input)
4353{
4354    // keep strong reference on the record thread so that
4355    // it is not destroyed while exit() is executed
4356    sp <RecordThread> thread;
4357    {
4358        Mutex::Autolock _l(mLock);
4359        thread = checkRecordThread_l(input);
4360        if (thread == NULL) {
4361            return BAD_VALUE;
4362        }
4363
4364        LOGV("closeInput() %d", input);
4365        void *param2 = 0;
4366        audioConfigChanged_l(AudioSystem::INPUT_CLOSED, input, param2);
4367        mRecordThreads.removeItem(input);
4368    }
4369    thread->exit();
4370
4371    mAudioHardware->closeInputStream(thread->getInput());
4372
4373    return NO_ERROR;
4374}
4375
4376status_t AudioFlinger::setStreamOutput(uint32_t stream, int output)
4377{
4378    Mutex::Autolock _l(mLock);
4379    MixerThread *dstThread = checkMixerThread_l(output);
4380    if (dstThread == NULL) {
4381        LOGW("setStreamOutput() bad output id %d", output);
4382        return BAD_VALUE;
4383    }
4384
4385    LOGV("setStreamOutput() stream %d to output %d", stream, output);
4386    audioConfigChanged_l(AudioSystem::STREAM_CONFIG_CHANGED, output, &stream);
4387
4388    for (size_t i = 0; i < mPlaybackThreads.size(); i++) {
4389        PlaybackThread *thread = mPlaybackThreads.valueAt(i).get();
4390        if (thread != dstThread &&
4391            thread->type() != PlaybackThread::DIRECT) {
4392            MixerThread *srcThread = (MixerThread *)thread;
4393            srcThread->invalidateTracks(stream);
4394        }
4395    }
4396
4397    return NO_ERROR;
4398}
4399
4400
4401int AudioFlinger::newAudioSessionId()
4402{
4403    AutoMutex _l(mLock);
4404    return nextUniqueId_l();
4405}
4406
4407// checkPlaybackThread_l() must be called with AudioFlinger::mLock held
4408AudioFlinger::PlaybackThread *AudioFlinger::checkPlaybackThread_l(int output) const
4409{
4410    PlaybackThread *thread = NULL;
4411    if (mPlaybackThreads.indexOfKey(output) >= 0) {
4412        thread = (PlaybackThread *)mPlaybackThreads.valueFor(output).get();
4413    }
4414    return thread;
4415}
4416
4417// checkMixerThread_l() must be called with AudioFlinger::mLock held
4418AudioFlinger::MixerThread *AudioFlinger::checkMixerThread_l(int output) const
4419{
4420    PlaybackThread *thread = checkPlaybackThread_l(output);
4421    if (thread != NULL) {
4422        if (thread->type() == PlaybackThread::DIRECT) {
4423            thread = NULL;
4424        }
4425    }
4426    return (MixerThread *)thread;
4427}
4428
4429// checkRecordThread_l() must be called with AudioFlinger::mLock held
4430AudioFlinger::RecordThread *AudioFlinger::checkRecordThread_l(int input) const
4431{
4432    RecordThread *thread = NULL;
4433    if (mRecordThreads.indexOfKey(input) >= 0) {
4434        thread = (RecordThread *)mRecordThreads.valueFor(input).get();
4435    }
4436    return thread;
4437}
4438
4439// nextUniqueId_l() must be called with AudioFlinger::mLock held
4440int AudioFlinger::nextUniqueId_l()
4441{
4442    return mNextUniqueId++;
4443}
4444
4445// ----------------------------------------------------------------------------
4446//  Effect management
4447// ----------------------------------------------------------------------------
4448
4449
4450status_t AudioFlinger::loadEffectLibrary(const char *libPath, int *handle)
4451{
4452    // check calling permissions
4453    if (!settingsAllowed()) {
4454        return PERMISSION_DENIED;
4455    }
4456    // only allow libraries loaded from /system/lib/soundfx for now
4457    if (strncmp(gEffectLibPath, libPath, strlen(gEffectLibPath)) != 0) {
4458        return PERMISSION_DENIED;
4459    }
4460
4461    Mutex::Autolock _l(mLock);
4462    return EffectLoadLibrary(libPath, handle);
4463}
4464
4465status_t AudioFlinger::unloadEffectLibrary(int handle)
4466{
4467    // check calling permissions
4468    if (!settingsAllowed()) {
4469        return PERMISSION_DENIED;
4470    }
4471
4472    Mutex::Autolock _l(mLock);
4473    return EffectUnloadLibrary(handle);
4474}
4475
4476status_t AudioFlinger::queryNumberEffects(uint32_t *numEffects)
4477{
4478    Mutex::Autolock _l(mLock);
4479    return EffectQueryNumberEffects(numEffects);
4480}
4481
4482status_t AudioFlinger::queryEffect(uint32_t index, effect_descriptor_t *descriptor)
4483{
4484    Mutex::Autolock _l(mLock);
4485    return EffectQueryEffect(index, descriptor);
4486}
4487
4488status_t AudioFlinger::getEffectDescriptor(effect_uuid_t *pUuid, effect_descriptor_t *descriptor)
4489{
4490    Mutex::Autolock _l(mLock);
4491    return EffectGetDescriptor(pUuid, descriptor);
4492}
4493
4494
4495// this UUID must match the one defined in media/libeffects/EffectVisualizer.cpp
4496static const effect_uuid_t VISUALIZATION_UUID_ =
4497    {0xd069d9e0, 0x8329, 0x11df, 0x9168, {0x00, 0x02, 0xa5, 0xd5, 0xc5, 0x1b}};
4498
4499sp<IEffect> AudioFlinger::createEffect(pid_t pid,
4500        effect_descriptor_t *pDesc,
4501        const sp<IEffectClient>& effectClient,
4502        int32_t priority,
4503        int output,
4504        int sessionId,
4505        status_t *status,
4506        int *id,
4507        int *enabled)
4508{
4509    status_t lStatus = NO_ERROR;
4510    sp<EffectHandle> handle;
4511    effect_interface_t itfe;
4512    effect_descriptor_t desc;
4513    sp<Client> client;
4514    wp<Client> wclient;
4515
4516    LOGV("createEffect pid %d, client %p, priority %d, sessionId %d, output %d",
4517            pid, effectClient.get(), priority, sessionId, output);
4518
4519    if (pDesc == NULL) {
4520        lStatus = BAD_VALUE;
4521        goto Exit;
4522    }
4523
4524    // check audio settings permission for global effects
4525    if (sessionId == AudioSystem::SESSION_OUTPUT_MIX && !settingsAllowed()) {
4526        lStatus = PERMISSION_DENIED;
4527        goto Exit;
4528    }
4529
4530    // Session AudioSystem::SESSION_OUTPUT_STAGE is reserved for output stage effects
4531    // that can only be created by audio policy manager (running in same process)
4532    if (sessionId == AudioSystem::SESSION_OUTPUT_STAGE && getpid() != pid) {
4533        lStatus = PERMISSION_DENIED;
4534        goto Exit;
4535    }
4536
4537    // check recording permission for visualizer
4538    if ((memcmp(&pDesc->type, SL_IID_VISUALIZATION, sizeof(effect_uuid_t)) == 0 ||
4539         memcmp(&pDesc->uuid, &VISUALIZATION_UUID_, sizeof(effect_uuid_t)) == 0) &&
4540        !recordingAllowed()) {
4541        lStatus = PERMISSION_DENIED;
4542        goto Exit;
4543    }
4544
4545    if (output == 0) {
4546        if (sessionId == AudioSystem::SESSION_OUTPUT_STAGE) {
4547            // output must be specified by AudioPolicyManager when using session
4548            // AudioSystem::SESSION_OUTPUT_STAGE
4549            lStatus = BAD_VALUE;
4550            goto Exit;
4551        } else if (sessionId == AudioSystem::SESSION_OUTPUT_MIX) {
4552            // if the output returned by getOutputForEffect() is removed before we lock the
4553            // mutex below, the call to checkPlaybackThread_l(output) below will detect it
4554            // and we will exit safely
4555            output = AudioSystem::getOutputForEffect(&desc);
4556        }
4557    }
4558
4559    {
4560        Mutex::Autolock _l(mLock);
4561
4562
4563        if (!EffectIsNullUuid(&pDesc->uuid)) {
4564            // if uuid is specified, request effect descriptor
4565            lStatus = EffectGetDescriptor(&pDesc->uuid, &desc);
4566            if (lStatus < 0) {
4567                LOGW("createEffect() error %d from EffectGetDescriptor", lStatus);
4568                goto Exit;
4569            }
4570        } else {
4571            // if uuid is not specified, look for an available implementation
4572            // of the required type in effect factory
4573            if (EffectIsNullUuid(&pDesc->type)) {
4574                LOGW("createEffect() no effect type");
4575                lStatus = BAD_VALUE;
4576                goto Exit;
4577            }
4578            uint32_t numEffects = 0;
4579            effect_descriptor_t d;
4580            bool found = false;
4581
4582            lStatus = EffectQueryNumberEffects(&numEffects);
4583            if (lStatus < 0) {
4584                LOGW("createEffect() error %d from EffectQueryNumberEffects", lStatus);
4585                goto Exit;
4586            }
4587            for (uint32_t i = 0; i < numEffects; i++) {
4588                lStatus = EffectQueryEffect(i, &desc);
4589                if (lStatus < 0) {
4590                    LOGW("createEffect() error %d from EffectQueryEffect", lStatus);
4591                    continue;
4592                }
4593                if (memcmp(&desc.type, &pDesc->type, sizeof(effect_uuid_t)) == 0) {
4594                    // If matching type found save effect descriptor. If the session is
4595                    // 0 and the effect is not auxiliary, continue enumeration in case
4596                    // an auxiliary version of this effect type is available
4597                    found = true;
4598                    memcpy(&d, &desc, sizeof(effect_descriptor_t));
4599                    if (sessionId != AudioSystem::SESSION_OUTPUT_MIX ||
4600                            (desc.flags & EFFECT_FLAG_TYPE_MASK) == EFFECT_FLAG_TYPE_AUXILIARY) {
4601                        break;
4602                    }
4603                }
4604            }
4605            if (!found) {
4606                lStatus = BAD_VALUE;
4607                LOGW("createEffect() effect not found");
4608                goto Exit;
4609            }
4610            // For same effect type, chose auxiliary version over insert version if
4611            // connect to output mix (Compliance to OpenSL ES)
4612            if (sessionId == AudioSystem::SESSION_OUTPUT_MIX &&
4613                    (d.flags & EFFECT_FLAG_TYPE_MASK) != EFFECT_FLAG_TYPE_AUXILIARY) {
4614                memcpy(&desc, &d, sizeof(effect_descriptor_t));
4615            }
4616        }
4617
4618        // Do not allow auxiliary effects on a session different from 0 (output mix)
4619        if (sessionId != AudioSystem::SESSION_OUTPUT_MIX &&
4620             (desc.flags & EFFECT_FLAG_TYPE_MASK) == EFFECT_FLAG_TYPE_AUXILIARY) {
4621            lStatus = INVALID_OPERATION;
4622            goto Exit;
4623        }
4624
4625        // return effect descriptor
4626        memcpy(pDesc, &desc, sizeof(effect_descriptor_t));
4627
4628        // If output is not specified try to find a matching audio session ID in one of the
4629        // output threads.
4630        // If output is 0 here, sessionId is neither SESSION_OUTPUT_STAGE nor SESSION_OUTPUT_MIX
4631        // because of code checking output when entering the function.
4632        if (output == 0) {
4633             // look for the thread where the specified audio session is present
4634            for (size_t i = 0; i < mPlaybackThreads.size(); i++) {
4635                if (mPlaybackThreads.valueAt(i)->hasAudioSession(sessionId) != 0) {
4636                    output = mPlaybackThreads.keyAt(i);
4637                    break;
4638                }
4639            }
4640            // If no output thread contains the requested session ID, default to
4641            // first output. The effect chain will be moved to the correct output
4642            // thread when a track with the same session ID is created
4643            if (output == 0 && mPlaybackThreads.size()) {
4644                output = mPlaybackThreads.keyAt(0);
4645            }
4646        }
4647        LOGV("createEffect() got output %d for effect %s", output, desc.name);
4648        PlaybackThread *thread = checkPlaybackThread_l(output);
4649        if (thread == NULL) {
4650            LOGE("createEffect() unknown output thread");
4651            lStatus = BAD_VALUE;
4652            goto Exit;
4653        }
4654
4655        // TODO: allow attachment of effect to inputs
4656
4657        wclient = mClients.valueFor(pid);
4658
4659        if (wclient != NULL) {
4660            client = wclient.promote();
4661        } else {
4662            client = new Client(this, pid);
4663            mClients.add(pid, client);
4664        }
4665
4666        // create effect on selected output trhead
4667        handle = thread->createEffect_l(client, effectClient, priority, sessionId,
4668                &desc, enabled, &lStatus);
4669        if (handle != 0 && id != NULL) {
4670            *id = handle->id();
4671        }
4672    }
4673
4674Exit:
4675    if(status) {
4676        *status = lStatus;
4677    }
4678    return handle;
4679}
4680
4681status_t AudioFlinger::moveEffects(int session, int srcOutput, int dstOutput)
4682{
4683    LOGV("moveEffects() session %d, srcOutput %d, dstOutput %d",
4684            session, srcOutput, dstOutput);
4685    Mutex::Autolock _l(mLock);
4686    if (srcOutput == dstOutput) {
4687        LOGW("moveEffects() same dst and src outputs %d", dstOutput);
4688        return NO_ERROR;
4689    }
4690    PlaybackThread *srcThread = checkPlaybackThread_l(srcOutput);
4691    if (srcThread == NULL) {
4692        LOGW("moveEffects() bad srcOutput %d", srcOutput);
4693        return BAD_VALUE;
4694    }
4695    PlaybackThread *dstThread = checkPlaybackThread_l(dstOutput);
4696    if (dstThread == NULL) {
4697        LOGW("moveEffects() bad dstOutput %d", dstOutput);
4698        return BAD_VALUE;
4699    }
4700
4701    Mutex::Autolock _dl(dstThread->mLock);
4702    Mutex::Autolock _sl(srcThread->mLock);
4703    moveEffectChain_l(session, srcThread, dstThread, false);
4704
4705    return NO_ERROR;
4706}
4707
4708// moveEffectChain_l mustbe called with both srcThread and dstThread mLocks held
4709status_t AudioFlinger::moveEffectChain_l(int session,
4710                                   AudioFlinger::PlaybackThread *srcThread,
4711                                   AudioFlinger::PlaybackThread *dstThread,
4712                                   bool reRegister)
4713{
4714    LOGV("moveEffectChain_l() session %d from thread %p to thread %p",
4715            session, srcThread, dstThread);
4716
4717    sp<EffectChain> chain = srcThread->getEffectChain_l(session);
4718    if (chain == 0) {
4719        LOGW("moveEffectChain_l() effect chain for session %d not on source thread %p",
4720                session, srcThread);
4721        return INVALID_OPERATION;
4722    }
4723
4724    // remove chain first. This is useful only if reconfiguring effect chain on same output thread,
4725    // so that a new chain is created with correct parameters when first effect is added. This is
4726    // otherwise unecessary as removeEffect_l() will remove the chain when last effect is
4727    // removed.
4728    srcThread->removeEffectChain_l(chain);
4729
4730    // transfer all effects one by one so that new effect chain is created on new thread with
4731    // correct buffer sizes and audio parameters and effect engines reconfigured accordingly
4732    int dstOutput = dstThread->id();
4733    sp<EffectChain> dstChain;
4734    uint32_t strategy;
4735    sp<EffectModule> effect = chain->getEffectFromId_l(0);
4736    while (effect != 0) {
4737        srcThread->removeEffect_l(effect);
4738        dstThread->addEffect_l(effect);
4739        // if the move request is not received from audio policy manager, the effect must be
4740        // re-registered with the new strategy and output
4741        if (dstChain == 0) {
4742            dstChain = effect->chain().promote();
4743            if (dstChain == 0) {
4744                LOGW("moveEffectChain_l() cannot get chain from effect %p", effect.get());
4745                srcThread->addEffect_l(effect);
4746                return NO_INIT;
4747            }
4748            strategy = dstChain->strategy();
4749        }
4750        if (reRegister) {
4751            AudioSystem::unregisterEffect(effect->id());
4752            AudioSystem::registerEffect(&effect->desc(),
4753                                        dstOutput,
4754                                        strategy,
4755                                        session,
4756                                        effect->id());
4757        }
4758        effect = chain->getEffectFromId_l(0);
4759    }
4760
4761    return NO_ERROR;
4762}
4763
4764// PlaybackThread::createEffect_l() must be called with AudioFlinger::mLock held
4765sp<AudioFlinger::EffectHandle> AudioFlinger::PlaybackThread::createEffect_l(
4766        const sp<AudioFlinger::Client>& client,
4767        const sp<IEffectClient>& effectClient,
4768        int32_t priority,
4769        int sessionId,
4770        effect_descriptor_t *desc,
4771        int *enabled,
4772        status_t *status
4773        )
4774{
4775    sp<EffectModule> effect;
4776    sp<EffectHandle> handle;
4777    status_t lStatus;
4778    sp<Track> track;
4779    sp<EffectChain> chain;
4780    bool chainCreated = false;
4781    bool effectCreated = false;
4782    bool effectRegistered = false;
4783
4784    if (mOutput == 0) {
4785        LOGW("createEffect_l() Audio driver not initialized.");
4786        lStatus = NO_INIT;
4787        goto Exit;
4788    }
4789
4790    // Do not allow auxiliary effect on session other than 0
4791    if ((desc->flags & EFFECT_FLAG_TYPE_MASK) == EFFECT_FLAG_TYPE_AUXILIARY &&
4792        sessionId != AudioSystem::SESSION_OUTPUT_MIX) {
4793        LOGW("createEffect_l() Cannot add auxiliary effect %s to session %d",
4794                desc->name, sessionId);
4795        lStatus = BAD_VALUE;
4796        goto Exit;
4797    }
4798
4799    // Do not allow effects with session ID 0 on direct output or duplicating threads
4800    // TODO: add rule for hw accelerated effects on direct outputs with non PCM format
4801    if (sessionId == AudioSystem::SESSION_OUTPUT_MIX && mType != MIXER) {
4802        LOGW("createEffect_l() Cannot add auxiliary effect %s to session %d",
4803                desc->name, sessionId);
4804        lStatus = BAD_VALUE;
4805        goto Exit;
4806    }
4807
4808    LOGV("createEffect_l() thread %p effect %s on session %d", this, desc->name, sessionId);
4809
4810    { // scope for mLock
4811        Mutex::Autolock _l(mLock);
4812
4813        // check for existing effect chain with the requested audio session
4814        chain = getEffectChain_l(sessionId);
4815        if (chain == 0) {
4816            // create a new chain for this session
4817            LOGV("createEffect_l() new effect chain for session %d", sessionId);
4818            chain = new EffectChain(this, sessionId);
4819            addEffectChain_l(chain);
4820            chain->setStrategy(getStrategyForSession_l(sessionId));
4821            chainCreated = true;
4822        } else {
4823            effect = chain->getEffectFromDesc_l(desc);
4824        }
4825
4826        LOGV("createEffect_l() got effect %p on chain %p", effect == 0 ? 0 : effect.get(), chain.get());
4827
4828        if (effect == 0) {
4829            int id = mAudioFlinger->nextUniqueId_l();
4830            // Check CPU and memory usage
4831            lStatus = AudioSystem::registerEffect(desc, mId, chain->strategy(), sessionId, id);
4832            if (lStatus != NO_ERROR) {
4833                goto Exit;
4834            }
4835            effectRegistered = true;
4836            // create a new effect module if none present in the chain
4837            effect = new EffectModule(this, chain, desc, id, sessionId);
4838            lStatus = effect->status();
4839            if (lStatus != NO_ERROR) {
4840                goto Exit;
4841            }
4842            lStatus = chain->addEffect_l(effect);
4843            if (lStatus != NO_ERROR) {
4844                goto Exit;
4845            }
4846            effectCreated = true;
4847
4848            effect->setDevice(mDevice);
4849            effect->setMode(mAudioFlinger->getMode());
4850        }
4851        // create effect handle and connect it to effect module
4852        handle = new EffectHandle(effect, client, effectClient, priority);
4853        lStatus = effect->addHandle(handle);
4854        if (enabled) {
4855            *enabled = (int)effect->isEnabled();
4856        }
4857    }
4858
4859Exit:
4860    if (lStatus != NO_ERROR && lStatus != ALREADY_EXISTS) {
4861        Mutex::Autolock _l(mLock);
4862        if (effectCreated) {
4863            chain->removeEffect_l(effect);
4864        }
4865        if (effectRegistered) {
4866            AudioSystem::unregisterEffect(effect->id());
4867        }
4868        if (chainCreated) {
4869            removeEffectChain_l(chain);
4870        }
4871        handle.clear();
4872    }
4873
4874    if(status) {
4875        *status = lStatus;
4876    }
4877    return handle;
4878}
4879
4880// PlaybackThread::addEffect_l() must be called with AudioFlinger::mLock and
4881// PlaybackThread::mLock held
4882status_t AudioFlinger::PlaybackThread::addEffect_l(const sp<EffectModule>& effect)
4883{
4884    // check for existing effect chain with the requested audio session
4885    int sessionId = effect->sessionId();
4886    sp<EffectChain> chain = getEffectChain_l(sessionId);
4887    bool chainCreated = false;
4888
4889    if (chain == 0) {
4890        // create a new chain for this session
4891        LOGV("addEffect_l() new effect chain for session %d", sessionId);
4892        chain = new EffectChain(this, sessionId);
4893        addEffectChain_l(chain);
4894        chain->setStrategy(getStrategyForSession_l(sessionId));
4895        chainCreated = true;
4896    }
4897    LOGV("addEffect_l() %p chain %p effect %p", this, chain.get(), effect.get());
4898
4899    if (chain->getEffectFromId_l(effect->id()) != 0) {
4900        LOGW("addEffect_l() %p effect %s already present in chain %p",
4901                this, effect->desc().name, chain.get());
4902        return BAD_VALUE;
4903    }
4904
4905    status_t status = chain->addEffect_l(effect);
4906    if (status != NO_ERROR) {
4907        if (chainCreated) {
4908            removeEffectChain_l(chain);
4909        }
4910        return status;
4911    }
4912
4913    effect->setDevice(mDevice);
4914    effect->setMode(mAudioFlinger->getMode());
4915    return NO_ERROR;
4916}
4917
4918void AudioFlinger::PlaybackThread::removeEffect_l(const sp<EffectModule>& effect) {
4919
4920    LOGV("removeEffect_l() %p effect %p", this, effect.get());
4921    effect_descriptor_t desc = effect->desc();
4922    if ((desc.flags & EFFECT_FLAG_TYPE_MASK) == EFFECT_FLAG_TYPE_AUXILIARY) {
4923        detachAuxEffect_l(effect->id());
4924    }
4925
4926    sp<EffectChain> chain = effect->chain().promote();
4927    if (chain != 0) {
4928        // remove effect chain if removing last effect
4929        if (chain->removeEffect_l(effect) == 0) {
4930            removeEffectChain_l(chain);
4931        }
4932    } else {
4933        LOGW("removeEffect_l() %p cannot promote chain for effect %p", this, effect.get());
4934    }
4935}
4936
4937void AudioFlinger::PlaybackThread::disconnectEffect(const sp<EffectModule>& effect,
4938                                                    const wp<EffectHandle>& handle) {
4939    Mutex::Autolock _l(mLock);
4940    LOGV("disconnectEffect() %p effect %p", this, effect.get());
4941    // delete the effect module if removing last handle on it
4942    if (effect->removeHandle(handle) == 0) {
4943        removeEffect_l(effect);
4944        AudioSystem::unregisterEffect(effect->id());
4945    }
4946}
4947
4948status_t AudioFlinger::PlaybackThread::addEffectChain_l(const sp<EffectChain>& chain)
4949{
4950    int session = chain->sessionId();
4951    int16_t *buffer = mMixBuffer;
4952    bool ownsBuffer = false;
4953
4954    LOGV("addEffectChain_l() %p on thread %p for session %d", chain.get(), this, session);
4955    if (session > 0) {
4956        // Only one effect chain can be present in direct output thread and it uses
4957        // the mix buffer as input
4958        if (mType != DIRECT) {
4959            size_t numSamples = mFrameCount * mChannelCount;
4960            buffer = new int16_t[numSamples];
4961            memset(buffer, 0, numSamples * sizeof(int16_t));
4962            LOGV("addEffectChain_l() creating new input buffer %p session %d", buffer, session);
4963            ownsBuffer = true;
4964        }
4965
4966        // Attach all tracks with same session ID to this chain.
4967        for (size_t i = 0; i < mTracks.size(); ++i) {
4968            sp<Track> track = mTracks[i];
4969            if (session == track->sessionId()) {
4970                LOGV("addEffectChain_l() track->setMainBuffer track %p buffer %p", track.get(), buffer);
4971                track->setMainBuffer(buffer);
4972            }
4973        }
4974
4975        // indicate all active tracks in the chain
4976        for (size_t i = 0 ; i < mActiveTracks.size() ; ++i) {
4977            sp<Track> track = mActiveTracks[i].promote();
4978            if (track == 0) continue;
4979            if (session == track->sessionId()) {
4980                LOGV("addEffectChain_l() activating track %p on session %d", track.get(), session);
4981                chain->startTrack();
4982            }
4983        }
4984    }
4985
4986    chain->setInBuffer(buffer, ownsBuffer);
4987    chain->setOutBuffer(mMixBuffer);
4988    // Effect chain for session AudioSystem::SESSION_OUTPUT_STAGE is inserted at end of effect
4989    // chains list in order to be processed last as it contains output stage effects
4990    // Effect chain for session AudioSystem::SESSION_OUTPUT_MIX is inserted before
4991    // session AudioSystem::SESSION_OUTPUT_STAGE to be processed
4992    // after track specific effects and before output stage
4993    // It is therefore mandatory that AudioSystem::SESSION_OUTPUT_MIX == 0 and
4994    // that AudioSystem::SESSION_OUTPUT_STAGE < AudioSystem::SESSION_OUTPUT_MIX
4995    // Effect chain for other sessions are inserted at beginning of effect
4996    // chains list to be processed before output mix effects. Relative order between other
4997    // sessions is not important
4998    size_t size = mEffectChains.size();
4999    size_t i = 0;
5000    for (i = 0; i < size; i++) {
5001        if (mEffectChains[i]->sessionId() < session) break;
5002    }
5003    mEffectChains.insertAt(chain, i);
5004
5005    return NO_ERROR;
5006}
5007
5008size_t AudioFlinger::PlaybackThread::removeEffectChain_l(const sp<EffectChain>& chain)
5009{
5010    int session = chain->sessionId();
5011
5012    LOGV("removeEffectChain_l() %p from thread %p for session %d", chain.get(), this, session);
5013
5014    for (size_t i = 0; i < mEffectChains.size(); i++) {
5015        if (chain == mEffectChains[i]) {
5016            mEffectChains.removeAt(i);
5017            // detach all tracks with same session ID from this chain
5018            for (size_t i = 0; i < mTracks.size(); ++i) {
5019                sp<Track> track = mTracks[i];
5020                if (session == track->sessionId()) {
5021                    track->setMainBuffer(mMixBuffer);
5022                }
5023            }
5024            break;
5025        }
5026    }
5027    return mEffectChains.size();
5028}
5029
5030void AudioFlinger::PlaybackThread::lockEffectChains_l(
5031        Vector<sp <AudioFlinger::EffectChain> >& effectChains)
5032{
5033    effectChains = mEffectChains;
5034    for (size_t i = 0; i < mEffectChains.size(); i++) {
5035        mEffectChains[i]->lock();
5036    }
5037}
5038
5039void AudioFlinger::PlaybackThread::unlockEffectChains(
5040        Vector<sp <AudioFlinger::EffectChain> >& effectChains)
5041{
5042    for (size_t i = 0; i < effectChains.size(); i++) {
5043        effectChains[i]->unlock();
5044    }
5045}
5046
5047
5048sp<AudioFlinger::EffectModule> AudioFlinger::PlaybackThread::getEffect_l(int sessionId, int effectId)
5049{
5050    sp<EffectModule> effect;
5051
5052    sp<EffectChain> chain = getEffectChain_l(sessionId);
5053    if (chain != 0) {
5054        effect = chain->getEffectFromId_l(effectId);
5055    }
5056    return effect;
5057}
5058
5059status_t AudioFlinger::PlaybackThread::attachAuxEffect(
5060        const sp<AudioFlinger::PlaybackThread::Track> track, int EffectId)
5061{
5062    Mutex::Autolock _l(mLock);
5063    return attachAuxEffect_l(track, EffectId);
5064}
5065
5066status_t AudioFlinger::PlaybackThread::attachAuxEffect_l(
5067        const sp<AudioFlinger::PlaybackThread::Track> track, int EffectId)
5068{
5069    status_t status = NO_ERROR;
5070
5071    if (EffectId == 0) {
5072        track->setAuxBuffer(0, NULL);
5073    } else {
5074        // Auxiliary effects are always in audio session AudioSystem::SESSION_OUTPUT_MIX
5075        sp<EffectModule> effect = getEffect_l(AudioSystem::SESSION_OUTPUT_MIX, EffectId);
5076        if (effect != 0) {
5077            if ((effect->desc().flags & EFFECT_FLAG_TYPE_MASK) == EFFECT_FLAG_TYPE_AUXILIARY) {
5078                track->setAuxBuffer(EffectId, (int32_t *)effect->inBuffer());
5079            } else {
5080                status = INVALID_OPERATION;
5081            }
5082        } else {
5083            status = BAD_VALUE;
5084        }
5085    }
5086    return status;
5087}
5088
5089void AudioFlinger::PlaybackThread::detachAuxEffect_l(int effectId)
5090{
5091     for (size_t i = 0; i < mTracks.size(); ++i) {
5092        sp<Track> track = mTracks[i];
5093        if (track->auxEffectId() == effectId) {
5094            attachAuxEffect_l(track, 0);
5095        }
5096    }
5097}
5098
5099// ----------------------------------------------------------------------------
5100//  EffectModule implementation
5101// ----------------------------------------------------------------------------
5102
5103#undef LOG_TAG
5104#define LOG_TAG "AudioFlinger::EffectModule"
5105
5106AudioFlinger::EffectModule::EffectModule(const wp<ThreadBase>& wThread,
5107                                        const wp<AudioFlinger::EffectChain>& chain,
5108                                        effect_descriptor_t *desc,
5109                                        int id,
5110                                        int sessionId)
5111    : mThread(wThread), mChain(chain), mId(id), mSessionId(sessionId), mEffectInterface(NULL),
5112      mStatus(NO_INIT), mState(IDLE)
5113{
5114    LOGV("Constructor %p", this);
5115    int lStatus;
5116    sp<ThreadBase> thread = mThread.promote();
5117    if (thread == 0) {
5118        return;
5119    }
5120    PlaybackThread *p = (PlaybackThread *)thread.get();
5121
5122    memcpy(&mDescriptor, desc, sizeof(effect_descriptor_t));
5123
5124    // create effect engine from effect factory
5125    mStatus = EffectCreate(&desc->uuid, sessionId, p->id(), &mEffectInterface);
5126
5127    if (mStatus != NO_ERROR) {
5128        return;
5129    }
5130    lStatus = init();
5131    if (lStatus < 0) {
5132        mStatus = lStatus;
5133        goto Error;
5134    }
5135
5136    LOGV("Constructor success name %s, Interface %p", mDescriptor.name, mEffectInterface);
5137    return;
5138Error:
5139    EffectRelease(mEffectInterface);
5140    mEffectInterface = NULL;
5141    LOGV("Constructor Error %d", mStatus);
5142}
5143
5144AudioFlinger::EffectModule::~EffectModule()
5145{
5146    LOGV("Destructor %p", this);
5147    if (mEffectInterface != NULL) {
5148        // release effect engine
5149        EffectRelease(mEffectInterface);
5150    }
5151}
5152
5153status_t AudioFlinger::EffectModule::addHandle(sp<EffectHandle>& handle)
5154{
5155    status_t status;
5156
5157    Mutex::Autolock _l(mLock);
5158    // First handle in mHandles has highest priority and controls the effect module
5159    int priority = handle->priority();
5160    size_t size = mHandles.size();
5161    sp<EffectHandle> h;
5162    size_t i;
5163    for (i = 0; i < size; i++) {
5164        h = mHandles[i].promote();
5165        if (h == 0) continue;
5166        if (h->priority() <= priority) break;
5167    }
5168    // if inserted in first place, move effect control from previous owner to this handle
5169    if (i == 0) {
5170        if (h != 0) {
5171            h->setControl(false, true);
5172        }
5173        handle->setControl(true, false);
5174        status = NO_ERROR;
5175    } else {
5176        status = ALREADY_EXISTS;
5177    }
5178    mHandles.insertAt(handle, i);
5179    return status;
5180}
5181
5182size_t AudioFlinger::EffectModule::removeHandle(const wp<EffectHandle>& handle)
5183{
5184    Mutex::Autolock _l(mLock);
5185    size_t size = mHandles.size();
5186    size_t i;
5187    for (i = 0; i < size; i++) {
5188        if (mHandles[i] == handle) break;
5189    }
5190    if (i == size) {
5191        return size;
5192    }
5193    mHandles.removeAt(i);
5194    size = mHandles.size();
5195    // if removed from first place, move effect control from this handle to next in line
5196    if (i == 0 && size != 0) {
5197        sp<EffectHandle> h = mHandles[0].promote();
5198        if (h != 0) {
5199            h->setControl(true, true);
5200        }
5201    }
5202
5203    // Release effect engine here so that it is done immediately. Otherwise it will be released
5204    // by the destructor when the last strong reference on the this object is released which can
5205    // happen after next process is called on this effect.
5206    if (size == 0 && mEffectInterface != NULL) {
5207        // release effect engine
5208        EffectRelease(mEffectInterface);
5209        mEffectInterface = NULL;
5210    }
5211
5212    return size;
5213}
5214
5215void AudioFlinger::EffectModule::disconnect(const wp<EffectHandle>& handle)
5216{
5217    // keep a strong reference on this EffectModule to avoid calling the
5218    // destructor before we exit
5219    sp<EffectModule> keep(this);
5220    {
5221        sp<ThreadBase> thread = mThread.promote();
5222        if (thread != 0) {
5223            PlaybackThread *playbackThread = (PlaybackThread *)thread.get();
5224            playbackThread->disconnectEffect(keep, handle);
5225        }
5226    }
5227}
5228
5229void AudioFlinger::EffectModule::updateState() {
5230    Mutex::Autolock _l(mLock);
5231
5232    switch (mState) {
5233    case RESTART:
5234        reset_l();
5235        // FALL THROUGH
5236
5237    case STARTING:
5238        // clear auxiliary effect input buffer for next accumulation
5239        if ((mDescriptor.flags & EFFECT_FLAG_TYPE_MASK) == EFFECT_FLAG_TYPE_AUXILIARY) {
5240            memset(mConfig.inputCfg.buffer.raw,
5241                   0,
5242                   mConfig.inputCfg.buffer.frameCount*sizeof(int32_t));
5243        }
5244        start_l();
5245        mState = ACTIVE;
5246        break;
5247    case STOPPING:
5248        stop_l();
5249        mDisableWaitCnt = mMaxDisableWaitCnt;
5250        mState = STOPPED;
5251        break;
5252    case STOPPED:
5253        // mDisableWaitCnt is forced to 1 by process() when the engine indicates the end of the
5254        // turn off sequence.
5255        if (--mDisableWaitCnt == 0) {
5256            reset_l();
5257            mState = IDLE;
5258        }
5259        break;
5260    default: //IDLE , ACTIVE
5261        break;
5262    }
5263}
5264
5265void AudioFlinger::EffectModule::process()
5266{
5267    Mutex::Autolock _l(mLock);
5268
5269    if (mEffectInterface == NULL ||
5270            mConfig.inputCfg.buffer.raw == NULL ||
5271            mConfig.outputCfg.buffer.raw == NULL) {
5272        return;
5273    }
5274
5275    if (isProcessEnabled()) {
5276        // do 32 bit to 16 bit conversion for auxiliary effect input buffer
5277        if ((mDescriptor.flags & EFFECT_FLAG_TYPE_MASK) == EFFECT_FLAG_TYPE_AUXILIARY) {
5278            AudioMixer::ditherAndClamp(mConfig.inputCfg.buffer.s32,
5279                                        mConfig.inputCfg.buffer.s32,
5280                                        mConfig.inputCfg.buffer.frameCount/2);
5281        }
5282
5283        // do the actual processing in the effect engine
5284        int ret = (*mEffectInterface)->process(mEffectInterface,
5285                                               &mConfig.inputCfg.buffer,
5286                                               &mConfig.outputCfg.buffer);
5287
5288        // force transition to IDLE state when engine is ready
5289        if (mState == STOPPED && ret == -ENODATA) {
5290            mDisableWaitCnt = 1;
5291        }
5292
5293        // clear auxiliary effect input buffer for next accumulation
5294        if ((mDescriptor.flags & EFFECT_FLAG_TYPE_MASK) == EFFECT_FLAG_TYPE_AUXILIARY) {
5295            memset(mConfig.inputCfg.buffer.raw, 0,
5296                   mConfig.inputCfg.buffer.frameCount*sizeof(int32_t));
5297        }
5298    } else if ((mDescriptor.flags & EFFECT_FLAG_TYPE_MASK) == EFFECT_FLAG_TYPE_INSERT &&
5299                mConfig.inputCfg.buffer.raw != mConfig.outputCfg.buffer.raw) {
5300        // If an insert effect is idle and input buffer is different from output buffer,
5301        // accumulate input onto output
5302        sp<EffectChain> chain = mChain.promote();
5303        if (chain != 0 && chain->activeTracks() != 0) {
5304            size_t frameCnt = mConfig.inputCfg.buffer.frameCount * 2;  //always stereo here
5305            int16_t *in = mConfig.inputCfg.buffer.s16;
5306            int16_t *out = mConfig.outputCfg.buffer.s16;
5307            for (size_t i = 0; i < frameCnt; i++) {
5308                out[i] = clamp16((int32_t)out[i] + (int32_t)in[i]);
5309            }
5310        }
5311    }
5312}
5313
5314void AudioFlinger::EffectModule::reset_l()
5315{
5316    if (mEffectInterface == NULL) {
5317        return;
5318    }
5319    (*mEffectInterface)->command(mEffectInterface, EFFECT_CMD_RESET, 0, NULL, 0, NULL);
5320}
5321
5322status_t AudioFlinger::EffectModule::configure()
5323{
5324    uint32_t channels;
5325    if (mEffectInterface == NULL) {
5326        return NO_INIT;
5327    }
5328
5329    sp<ThreadBase> thread = mThread.promote();
5330    if (thread == 0) {
5331        return DEAD_OBJECT;
5332    }
5333
5334    // TODO: handle configuration of effects replacing track process
5335    if (thread->channelCount() == 1) {
5336        channels = CHANNEL_MONO;
5337    } else {
5338        channels = CHANNEL_STEREO;
5339    }
5340
5341    if ((mDescriptor.flags & EFFECT_FLAG_TYPE_MASK) == EFFECT_FLAG_TYPE_AUXILIARY) {
5342        mConfig.inputCfg.channels = CHANNEL_MONO;
5343    } else {
5344        mConfig.inputCfg.channels = channels;
5345    }
5346    mConfig.outputCfg.channels = channels;
5347    mConfig.inputCfg.format = SAMPLE_FORMAT_PCM_S15;
5348    mConfig.outputCfg.format = SAMPLE_FORMAT_PCM_S15;
5349    mConfig.inputCfg.samplingRate = thread->sampleRate();
5350    mConfig.outputCfg.samplingRate = mConfig.inputCfg.samplingRate;
5351    mConfig.inputCfg.bufferProvider.cookie = NULL;
5352    mConfig.inputCfg.bufferProvider.getBuffer = NULL;
5353    mConfig.inputCfg.bufferProvider.releaseBuffer = NULL;
5354    mConfig.outputCfg.bufferProvider.cookie = NULL;
5355    mConfig.outputCfg.bufferProvider.getBuffer = NULL;
5356    mConfig.outputCfg.bufferProvider.releaseBuffer = NULL;
5357    mConfig.inputCfg.accessMode = EFFECT_BUFFER_ACCESS_READ;
5358    // Insert effect:
5359    // - in session AudioSystem::SESSION_OUTPUT_MIX or AudioSystem::SESSION_OUTPUT_STAGE,
5360    // always overwrites output buffer: input buffer == output buffer
5361    // - in other sessions:
5362    //      last effect in the chain accumulates in output buffer: input buffer != output buffer
5363    //      other effect: overwrites output buffer: input buffer == output buffer
5364    // Auxiliary effect:
5365    //      accumulates in output buffer: input buffer != output buffer
5366    // Therefore: accumulate <=> input buffer != output buffer
5367    if (mConfig.inputCfg.buffer.raw != mConfig.outputCfg.buffer.raw) {
5368        mConfig.outputCfg.accessMode = EFFECT_BUFFER_ACCESS_ACCUMULATE;
5369    } else {
5370        mConfig.outputCfg.accessMode = EFFECT_BUFFER_ACCESS_WRITE;
5371    }
5372    mConfig.inputCfg.mask = EFFECT_CONFIG_ALL;
5373    mConfig.outputCfg.mask = EFFECT_CONFIG_ALL;
5374    mConfig.inputCfg.buffer.frameCount = thread->frameCount();
5375    mConfig.outputCfg.buffer.frameCount = mConfig.inputCfg.buffer.frameCount;
5376
5377    LOGV("configure() %p thread %p buffer %p framecount %d",
5378            this, thread.get(), mConfig.inputCfg.buffer.raw, mConfig.inputCfg.buffer.frameCount);
5379
5380    status_t cmdStatus;
5381    uint32_t size = sizeof(int);
5382    status_t status = (*mEffectInterface)->command(mEffectInterface,
5383                                                   EFFECT_CMD_CONFIGURE,
5384                                                   sizeof(effect_config_t),
5385                                                   &mConfig,
5386                                                   &size,
5387                                                   &cmdStatus);
5388    if (status == 0) {
5389        status = cmdStatus;
5390    }
5391
5392    mMaxDisableWaitCnt = (MAX_DISABLE_TIME_MS * mConfig.outputCfg.samplingRate) /
5393            (1000 * mConfig.outputCfg.buffer.frameCount);
5394
5395    return status;
5396}
5397
5398status_t AudioFlinger::EffectModule::init()
5399{
5400    Mutex::Autolock _l(mLock);
5401    if (mEffectInterface == NULL) {
5402        return NO_INIT;
5403    }
5404    status_t cmdStatus;
5405    uint32_t size = sizeof(status_t);
5406    status_t status = (*mEffectInterface)->command(mEffectInterface,
5407                                                   EFFECT_CMD_INIT,
5408                                                   0,
5409                                                   NULL,
5410                                                   &size,
5411                                                   &cmdStatus);
5412    if (status == 0) {
5413        status = cmdStatus;
5414    }
5415    return status;
5416}
5417
5418status_t AudioFlinger::EffectModule::start_l()
5419{
5420    if (mEffectInterface == NULL) {
5421        return NO_INIT;
5422    }
5423    status_t cmdStatus;
5424    uint32_t size = sizeof(status_t);
5425    status_t status = (*mEffectInterface)->command(mEffectInterface,
5426                                                   EFFECT_CMD_ENABLE,
5427                                                   0,
5428                                                   NULL,
5429                                                   &size,
5430                                                   &cmdStatus);
5431    if (status == 0) {
5432        status = cmdStatus;
5433    }
5434    return status;
5435}
5436
5437status_t AudioFlinger::EffectModule::stop_l()
5438{
5439    if (mEffectInterface == NULL) {
5440        return NO_INIT;
5441    }
5442    status_t cmdStatus;
5443    uint32_t size = sizeof(status_t);
5444    status_t status = (*mEffectInterface)->command(mEffectInterface,
5445                                                   EFFECT_CMD_DISABLE,
5446                                                   0,
5447                                                   NULL,
5448                                                   &size,
5449                                                   &cmdStatus);
5450    if (status == 0) {
5451        status = cmdStatus;
5452    }
5453    return status;
5454}
5455
5456status_t AudioFlinger::EffectModule::command(uint32_t cmdCode,
5457                                             uint32_t cmdSize,
5458                                             void *pCmdData,
5459                                             uint32_t *replySize,
5460                                             void *pReplyData)
5461{
5462    Mutex::Autolock _l(mLock);
5463//    LOGV("command(), cmdCode: %d, mEffectInterface: %p", cmdCode, mEffectInterface);
5464
5465    if (mEffectInterface == NULL) {
5466        return NO_INIT;
5467    }
5468    status_t status = (*mEffectInterface)->command(mEffectInterface,
5469                                                   cmdCode,
5470                                                   cmdSize,
5471                                                   pCmdData,
5472                                                   replySize,
5473                                                   pReplyData);
5474    if (cmdCode != EFFECT_CMD_GET_PARAM && status == NO_ERROR) {
5475        uint32_t size = (replySize == NULL) ? 0 : *replySize;
5476        for (size_t i = 1; i < mHandles.size(); i++) {
5477            sp<EffectHandle> h = mHandles[i].promote();
5478            if (h != 0) {
5479                h->commandExecuted(cmdCode, cmdSize, pCmdData, size, pReplyData);
5480            }
5481        }
5482    }
5483    return status;
5484}
5485
5486status_t AudioFlinger::EffectModule::setEnabled(bool enabled)
5487{
5488    Mutex::Autolock _l(mLock);
5489    LOGV("setEnabled %p enabled %d", this, enabled);
5490
5491    if (enabled != isEnabled()) {
5492        switch (mState) {
5493        // going from disabled to enabled
5494        case IDLE:
5495            mState = STARTING;
5496            break;
5497        case STOPPED:
5498            mState = RESTART;
5499            break;
5500        case STOPPING:
5501            mState = ACTIVE;
5502            break;
5503
5504        // going from enabled to disabled
5505        case RESTART:
5506            mState = STOPPED;
5507            break;
5508        case STARTING:
5509            mState = IDLE;
5510            break;
5511        case ACTIVE:
5512            mState = STOPPING;
5513            break;
5514        }
5515        for (size_t i = 1; i < mHandles.size(); i++) {
5516            sp<EffectHandle> h = mHandles[i].promote();
5517            if (h != 0) {
5518                h->setEnabled(enabled);
5519            }
5520        }
5521    }
5522    return NO_ERROR;
5523}
5524
5525bool AudioFlinger::EffectModule::isEnabled()
5526{
5527    switch (mState) {
5528    case RESTART:
5529    case STARTING:
5530    case ACTIVE:
5531        return true;
5532    case IDLE:
5533    case STOPPING:
5534    case STOPPED:
5535    default:
5536        return false;
5537    }
5538}
5539
5540bool AudioFlinger::EffectModule::isProcessEnabled()
5541{
5542    switch (mState) {
5543    case RESTART:
5544    case ACTIVE:
5545    case STOPPING:
5546    case STOPPED:
5547        return true;
5548    case IDLE:
5549    case STARTING:
5550    default:
5551        return false;
5552    }
5553}
5554
5555status_t AudioFlinger::EffectModule::setVolume(uint32_t *left, uint32_t *right, bool controller)
5556{
5557    Mutex::Autolock _l(mLock);
5558    status_t status = NO_ERROR;
5559
5560    // Send volume indication if EFFECT_FLAG_VOLUME_IND is set and read back altered volume
5561    // if controller flag is set (Note that controller == TRUE => EFFECT_FLAG_VOLUME_CTRL set)
5562    if (isProcessEnabled() &&
5563            ((mDescriptor.flags & EFFECT_FLAG_VOLUME_MASK) == EFFECT_FLAG_VOLUME_CTRL ||
5564            (mDescriptor.flags & EFFECT_FLAG_VOLUME_MASK) == EFFECT_FLAG_VOLUME_IND)) {
5565        status_t cmdStatus;
5566        uint32_t volume[2];
5567        uint32_t *pVolume = NULL;
5568        uint32_t size = sizeof(volume);
5569        volume[0] = *left;
5570        volume[1] = *right;
5571        if (controller) {
5572            pVolume = volume;
5573        }
5574        status = (*mEffectInterface)->command(mEffectInterface,
5575                                              EFFECT_CMD_SET_VOLUME,
5576                                              size,
5577                                              volume,
5578                                              &size,
5579                                              pVolume);
5580        if (controller && status == NO_ERROR && size == sizeof(volume)) {
5581            *left = volume[0];
5582            *right = volume[1];
5583        }
5584    }
5585    return status;
5586}
5587
5588status_t AudioFlinger::EffectModule::setDevice(uint32_t device)
5589{
5590    Mutex::Autolock _l(mLock);
5591    status_t status = NO_ERROR;
5592    if ((mDescriptor.flags & EFFECT_FLAG_DEVICE_MASK) == EFFECT_FLAG_DEVICE_IND) {
5593        // convert device bit field from AudioSystem to EffectApi format.
5594        device = deviceAudioSystemToEffectApi(device);
5595        if (device == 0) {
5596            return BAD_VALUE;
5597        }
5598        status_t cmdStatus;
5599        uint32_t size = sizeof(status_t);
5600        status = (*mEffectInterface)->command(mEffectInterface,
5601                                              EFFECT_CMD_SET_DEVICE,
5602                                              sizeof(uint32_t),
5603                                              &device,
5604                                              &size,
5605                                              &cmdStatus);
5606        if (status == NO_ERROR) {
5607            status = cmdStatus;
5608        }
5609    }
5610    return status;
5611}
5612
5613status_t AudioFlinger::EffectModule::setMode(uint32_t mode)
5614{
5615    Mutex::Autolock _l(mLock);
5616    status_t status = NO_ERROR;
5617    if ((mDescriptor.flags & EFFECT_FLAG_AUDIO_MODE_MASK) == EFFECT_FLAG_AUDIO_MODE_IND) {
5618        // convert audio mode from AudioSystem to EffectApi format.
5619        int effectMode = modeAudioSystemToEffectApi(mode);
5620        if (effectMode < 0) {
5621            return BAD_VALUE;
5622        }
5623        status_t cmdStatus;
5624        uint32_t size = sizeof(status_t);
5625        status = (*mEffectInterface)->command(mEffectInterface,
5626                                              EFFECT_CMD_SET_AUDIO_MODE,
5627                                              sizeof(int),
5628                                              &effectMode,
5629                                              &size,
5630                                              &cmdStatus);
5631        if (status == NO_ERROR) {
5632            status = cmdStatus;
5633        }
5634    }
5635    return status;
5636}
5637
5638// update this table when AudioSystem::audio_devices or audio_device_e (in EffectApi.h) are modified
5639const uint32_t AudioFlinger::EffectModule::sDeviceConvTable[] = {
5640    DEVICE_EARPIECE, // AudioSystem::DEVICE_OUT_EARPIECE
5641    DEVICE_SPEAKER, // AudioSystem::DEVICE_OUT_SPEAKER
5642    DEVICE_WIRED_HEADSET, // case AudioSystem::DEVICE_OUT_WIRED_HEADSET
5643    DEVICE_WIRED_HEADPHONE, // AudioSystem::DEVICE_OUT_WIRED_HEADPHONE
5644    DEVICE_BLUETOOTH_SCO, // AudioSystem::DEVICE_OUT_BLUETOOTH_SCO
5645    DEVICE_BLUETOOTH_SCO_HEADSET, // AudioSystem::DEVICE_OUT_BLUETOOTH_SCO_HEADSET
5646    DEVICE_BLUETOOTH_SCO_CARKIT, //  AudioSystem::DEVICE_OUT_BLUETOOTH_SCO_CARKIT
5647    DEVICE_BLUETOOTH_A2DP, //  AudioSystem::DEVICE_OUT_BLUETOOTH_A2DP
5648    DEVICE_BLUETOOTH_A2DP_HEADPHONES, // AudioSystem::DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES
5649    DEVICE_BLUETOOTH_A2DP_SPEAKER, // AudioSystem::DEVICE_OUT_BLUETOOTH_A2DP_SPEAKER
5650    DEVICE_AUX_DIGITAL // AudioSystem::DEVICE_OUT_AUX_DIGITAL
5651};
5652
5653uint32_t AudioFlinger::EffectModule::deviceAudioSystemToEffectApi(uint32_t device)
5654{
5655    uint32_t deviceOut = 0;
5656    while (device) {
5657        const uint32_t i = 31 - __builtin_clz(device);
5658        device &= ~(1 << i);
5659        if (i >= sizeof(sDeviceConvTable)/sizeof(uint32_t)) {
5660            LOGE("device convertion error for AudioSystem device 0x%08x", device);
5661            return 0;
5662        }
5663        deviceOut |= (uint32_t)sDeviceConvTable[i];
5664    }
5665    return deviceOut;
5666}
5667
5668// update this table when AudioSystem::audio_mode or audio_mode_e (in EffectApi.h) are modified
5669const uint32_t AudioFlinger::EffectModule::sModeConvTable[] = {
5670    AUDIO_MODE_NORMAL,   // AudioSystem::MODE_NORMAL
5671    AUDIO_MODE_RINGTONE, // AudioSystem::MODE_RINGTONE
5672    AUDIO_MODE_IN_CALL,  // AudioSystem::MODE_IN_CALL
5673    AUDIO_MODE_IN_CALL   // AudioSystem::MODE_IN_COMMUNICATION, same conversion as for MODE_IN_CALL
5674};
5675
5676int AudioFlinger::EffectModule::modeAudioSystemToEffectApi(uint32_t mode)
5677{
5678    int modeOut = -1;
5679    if (mode < sizeof(sModeConvTable) / sizeof(uint32_t)) {
5680        modeOut = (int)sModeConvTable[mode];
5681    }
5682    return modeOut;
5683}
5684
5685status_t AudioFlinger::EffectModule::dump(int fd, const Vector<String16>& args)
5686{
5687    const size_t SIZE = 256;
5688    char buffer[SIZE];
5689    String8 result;
5690
5691    snprintf(buffer, SIZE, "\tEffect ID %d:\n", mId);
5692    result.append(buffer);
5693
5694    bool locked = tryLock(mLock);
5695    // failed to lock - AudioFlinger is probably deadlocked
5696    if (!locked) {
5697        result.append("\t\tCould not lock Fx mutex:\n");
5698    }
5699
5700    result.append("\t\tSession Status State Engine:\n");
5701    snprintf(buffer, SIZE, "\t\t%05d   %03d    %03d   0x%08x\n",
5702            mSessionId, mStatus, mState, (uint32_t)mEffectInterface);
5703    result.append(buffer);
5704
5705    result.append("\t\tDescriptor:\n");
5706    snprintf(buffer, SIZE, "\t\t- UUID: %08X-%04X-%04X-%04X-%02X%02X%02X%02X%02X%02X\n",
5707            mDescriptor.uuid.timeLow, mDescriptor.uuid.timeMid, mDescriptor.uuid.timeHiAndVersion,
5708            mDescriptor.uuid.clockSeq, mDescriptor.uuid.node[0], mDescriptor.uuid.node[1],mDescriptor.uuid.node[2],
5709            mDescriptor.uuid.node[3],mDescriptor.uuid.node[4],mDescriptor.uuid.node[5]);
5710    result.append(buffer);
5711    snprintf(buffer, SIZE, "\t\t- TYPE: %08X-%04X-%04X-%04X-%02X%02X%02X%02X%02X%02X\n",
5712                mDescriptor.type.timeLow, mDescriptor.type.timeMid, mDescriptor.type.timeHiAndVersion,
5713                mDescriptor.type.clockSeq, mDescriptor.type.node[0], mDescriptor.type.node[1],mDescriptor.type.node[2],
5714                mDescriptor.type.node[3],mDescriptor.type.node[4],mDescriptor.type.node[5]);
5715    result.append(buffer);
5716    snprintf(buffer, SIZE, "\t\t- apiVersion: %04X\n\t\t- flags: %08X\n",
5717            mDescriptor.apiVersion,
5718            mDescriptor.flags);
5719    result.append(buffer);
5720    snprintf(buffer, SIZE, "\t\t- name: %s\n",
5721            mDescriptor.name);
5722    result.append(buffer);
5723    snprintf(buffer, SIZE, "\t\t- implementor: %s\n",
5724            mDescriptor.implementor);
5725    result.append(buffer);
5726
5727    result.append("\t\t- Input configuration:\n");
5728    result.append("\t\t\tBuffer     Frames  Smp rate Channels Format\n");
5729    snprintf(buffer, SIZE, "\t\t\t0x%08x %05d   %05d    %08x %d\n",
5730            (uint32_t)mConfig.inputCfg.buffer.raw,
5731            mConfig.inputCfg.buffer.frameCount,
5732            mConfig.inputCfg.samplingRate,
5733            mConfig.inputCfg.channels,
5734            mConfig.inputCfg.format);
5735    result.append(buffer);
5736
5737    result.append("\t\t- Output configuration:\n");
5738    result.append("\t\t\tBuffer     Frames  Smp rate Channels Format\n");
5739    snprintf(buffer, SIZE, "\t\t\t0x%08x %05d   %05d    %08x %d\n",
5740            (uint32_t)mConfig.outputCfg.buffer.raw,
5741            mConfig.outputCfg.buffer.frameCount,
5742            mConfig.outputCfg.samplingRate,
5743            mConfig.outputCfg.channels,
5744            mConfig.outputCfg.format);
5745    result.append(buffer);
5746
5747    snprintf(buffer, SIZE, "\t\t%d Clients:\n", mHandles.size());
5748    result.append(buffer);
5749    result.append("\t\t\tPid   Priority Ctrl Locked client server\n");
5750    for (size_t i = 0; i < mHandles.size(); ++i) {
5751        sp<EffectHandle> handle = mHandles[i].promote();
5752        if (handle != 0) {
5753            handle->dump(buffer, SIZE);
5754            result.append(buffer);
5755        }
5756    }
5757
5758    result.append("\n");
5759
5760    write(fd, result.string(), result.length());
5761
5762    if (locked) {
5763        mLock.unlock();
5764    }
5765
5766    return NO_ERROR;
5767}
5768
5769// ----------------------------------------------------------------------------
5770//  EffectHandle implementation
5771// ----------------------------------------------------------------------------
5772
5773#undef LOG_TAG
5774#define LOG_TAG "AudioFlinger::EffectHandle"
5775
5776AudioFlinger::EffectHandle::EffectHandle(const sp<EffectModule>& effect,
5777                                        const sp<AudioFlinger::Client>& client,
5778                                        const sp<IEffectClient>& effectClient,
5779                                        int32_t priority)
5780    : BnEffect(),
5781    mEffect(effect), mEffectClient(effectClient), mClient(client), mPriority(priority), mHasControl(false)
5782{
5783    LOGV("constructor %p", this);
5784
5785    int bufOffset = ((sizeof(effect_param_cblk_t) - 1) / sizeof(int) + 1) * sizeof(int);
5786    mCblkMemory = client->heap()->allocate(EFFECT_PARAM_BUFFER_SIZE + bufOffset);
5787    if (mCblkMemory != 0) {
5788        mCblk = static_cast<effect_param_cblk_t *>(mCblkMemory->pointer());
5789
5790        if (mCblk) {
5791            new(mCblk) effect_param_cblk_t();
5792            mBuffer = (uint8_t *)mCblk + bufOffset;
5793         }
5794    } else {
5795        LOGE("not enough memory for Effect size=%u", EFFECT_PARAM_BUFFER_SIZE + sizeof(effect_param_cblk_t));
5796        return;
5797    }
5798}
5799
5800AudioFlinger::EffectHandle::~EffectHandle()
5801{
5802    LOGV("Destructor %p", this);
5803    disconnect();
5804}
5805
5806status_t AudioFlinger::EffectHandle::enable()
5807{
5808    if (!mHasControl) return INVALID_OPERATION;
5809    if (mEffect == 0) return DEAD_OBJECT;
5810
5811    return mEffect->setEnabled(true);
5812}
5813
5814status_t AudioFlinger::EffectHandle::disable()
5815{
5816    if (!mHasControl) return INVALID_OPERATION;
5817    if (mEffect == NULL) return DEAD_OBJECT;
5818
5819    return mEffect->setEnabled(false);
5820}
5821
5822void AudioFlinger::EffectHandle::disconnect()
5823{
5824    if (mEffect == 0) {
5825        return;
5826    }
5827    mEffect->disconnect(this);
5828    // release sp on module => module destructor can be called now
5829    mEffect.clear();
5830    if (mCblk) {
5831        mCblk->~effect_param_cblk_t();   // destroy our shared-structure.
5832    }
5833    mCblkMemory.clear();            // and free the shared memory
5834    if (mClient != 0) {
5835        Mutex::Autolock _l(mClient->audioFlinger()->mLock);
5836        mClient.clear();
5837    }
5838}
5839
5840status_t AudioFlinger::EffectHandle::command(uint32_t cmdCode,
5841                                             uint32_t cmdSize,
5842                                             void *pCmdData,
5843                                             uint32_t *replySize,
5844                                             void *pReplyData)
5845{
5846//    LOGV("command(), cmdCode: %d, mHasControl: %d, mEffect: %p",
5847//              cmdCode, mHasControl, (mEffect == 0) ? 0 : mEffect.get());
5848
5849    // only get parameter command is permitted for applications not controlling the effect
5850    if (!mHasControl && cmdCode != EFFECT_CMD_GET_PARAM) {
5851        return INVALID_OPERATION;
5852    }
5853    if (mEffect == 0) return DEAD_OBJECT;
5854
5855    // handle commands that are not forwarded transparently to effect engine
5856    if (cmdCode == EFFECT_CMD_SET_PARAM_COMMIT) {
5857        // No need to trylock() here as this function is executed in the binder thread serving a particular client process:
5858        // no risk to block the whole media server process or mixer threads is we are stuck here
5859        Mutex::Autolock _l(mCblk->lock);
5860        if (mCblk->clientIndex > EFFECT_PARAM_BUFFER_SIZE ||
5861            mCblk->serverIndex > EFFECT_PARAM_BUFFER_SIZE) {
5862            mCblk->serverIndex = 0;
5863            mCblk->clientIndex = 0;
5864            return BAD_VALUE;
5865        }
5866        status_t status = NO_ERROR;
5867        while (mCblk->serverIndex < mCblk->clientIndex) {
5868            int reply;
5869            uint32_t rsize = sizeof(int);
5870            int *p = (int *)(mBuffer + mCblk->serverIndex);
5871            int size = *p++;
5872            if (((uint8_t *)p + size) > mBuffer + mCblk->clientIndex) {
5873                LOGW("command(): invalid parameter block size");
5874                break;
5875            }
5876            effect_param_t *param = (effect_param_t *)p;
5877            if (param->psize == 0 || param->vsize == 0) {
5878                LOGW("command(): null parameter or value size");
5879                mCblk->serverIndex += size;
5880                continue;
5881            }
5882            uint32_t psize = sizeof(effect_param_t) +
5883                             ((param->psize - 1) / sizeof(int) + 1) * sizeof(int) +
5884                             param->vsize;
5885            status_t ret = mEffect->command(EFFECT_CMD_SET_PARAM,
5886                                            psize,
5887                                            p,
5888                                            &rsize,
5889                                            &reply);
5890            // stop at first error encountered
5891            if (ret != NO_ERROR) {
5892                status = ret;
5893                *(int *)pReplyData = reply;
5894                break;
5895            } else if (reply != NO_ERROR) {
5896                *(int *)pReplyData = reply;
5897                break;
5898            }
5899            mCblk->serverIndex += size;
5900        }
5901        mCblk->serverIndex = 0;
5902        mCblk->clientIndex = 0;
5903        return status;
5904    } else if (cmdCode == EFFECT_CMD_ENABLE) {
5905        *(int *)pReplyData = NO_ERROR;
5906        return enable();
5907    } else if (cmdCode == EFFECT_CMD_DISABLE) {
5908        *(int *)pReplyData = NO_ERROR;
5909        return disable();
5910    }
5911
5912    return mEffect->command(cmdCode, cmdSize, pCmdData, replySize, pReplyData);
5913}
5914
5915sp<IMemory> AudioFlinger::EffectHandle::getCblk() const {
5916    return mCblkMemory;
5917}
5918
5919void AudioFlinger::EffectHandle::setControl(bool hasControl, bool signal)
5920{
5921    LOGV("setControl %p control %d", this, hasControl);
5922
5923    mHasControl = hasControl;
5924    if (signal && mEffectClient != 0) {
5925        mEffectClient->controlStatusChanged(hasControl);
5926    }
5927}
5928
5929void AudioFlinger::EffectHandle::commandExecuted(uint32_t cmdCode,
5930                                                 uint32_t cmdSize,
5931                                                 void *pCmdData,
5932                                                 uint32_t replySize,
5933                                                 void *pReplyData)
5934{
5935    if (mEffectClient != 0) {
5936        mEffectClient->commandExecuted(cmdCode, cmdSize, pCmdData, replySize, pReplyData);
5937    }
5938}
5939
5940
5941
5942void AudioFlinger::EffectHandle::setEnabled(bool enabled)
5943{
5944    if (mEffectClient != 0) {
5945        mEffectClient->enableStatusChanged(enabled);
5946    }
5947}
5948
5949status_t AudioFlinger::EffectHandle::onTransact(
5950    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
5951{
5952    return BnEffect::onTransact(code, data, reply, flags);
5953}
5954
5955
5956void AudioFlinger::EffectHandle::dump(char* buffer, size_t size)
5957{
5958    bool locked = tryLock(mCblk->lock);
5959
5960    snprintf(buffer, size, "\t\t\t%05d %05d    %01u    %01u      %05u  %05u\n",
5961            (mClient == NULL) ? getpid() : mClient->pid(),
5962            mPriority,
5963            mHasControl,
5964            !locked,
5965            mCblk->clientIndex,
5966            mCblk->serverIndex
5967            );
5968
5969    if (locked) {
5970        mCblk->lock.unlock();
5971    }
5972}
5973
5974#undef LOG_TAG
5975#define LOG_TAG "AudioFlinger::EffectChain"
5976
5977AudioFlinger::EffectChain::EffectChain(const wp<ThreadBase>& wThread,
5978                                        int sessionId)
5979    : mThread(wThread), mSessionId(sessionId), mActiveTrackCnt(0), mOwnInBuffer(false),
5980            mVolumeCtrlIdx(-1), mLeftVolume(UINT_MAX), mRightVolume(UINT_MAX),
5981            mNewLeftVolume(UINT_MAX), mNewRightVolume(UINT_MAX)
5982{
5983    mStrategy = AudioSystem::getStrategyForStream(AudioSystem::MUSIC);
5984}
5985
5986AudioFlinger::EffectChain::~EffectChain()
5987{
5988    if (mOwnInBuffer) {
5989        delete mInBuffer;
5990    }
5991
5992}
5993
5994// getEffectFromDesc_l() must be called with PlaybackThread::mLock held
5995sp<AudioFlinger::EffectModule> AudioFlinger::EffectChain::getEffectFromDesc_l(effect_descriptor_t *descriptor)
5996{
5997    sp<EffectModule> effect;
5998    size_t size = mEffects.size();
5999
6000    for (size_t i = 0; i < size; i++) {
6001        if (memcmp(&mEffects[i]->desc().uuid, &descriptor->uuid, sizeof(effect_uuid_t)) == 0) {
6002            effect = mEffects[i];
6003            break;
6004        }
6005    }
6006    return effect;
6007}
6008
6009// getEffectFromId_l() must be called with PlaybackThread::mLock held
6010sp<AudioFlinger::EffectModule> AudioFlinger::EffectChain::getEffectFromId_l(int id)
6011{
6012    sp<EffectModule> effect;
6013    size_t size = mEffects.size();
6014
6015    for (size_t i = 0; i < size; i++) {
6016        // by convention, return first effect if id provided is 0 (0 is never a valid id)
6017        if (id == 0 || mEffects[i]->id() == id) {
6018            effect = mEffects[i];
6019            break;
6020        }
6021    }
6022    return effect;
6023}
6024
6025// Must be called with EffectChain::mLock locked
6026void AudioFlinger::EffectChain::process_l()
6027{
6028    sp<ThreadBase> thread = mThread.promote();
6029    if (thread == 0) {
6030        LOGW("process_l(): cannot promote mixer thread");
6031        return;
6032    }
6033    PlaybackThread *playbackThread = (PlaybackThread *)thread.get();
6034    bool isGlobalSession = (mSessionId == AudioSystem::SESSION_OUTPUT_MIX) ||
6035            (mSessionId == AudioSystem::SESSION_OUTPUT_STAGE);
6036    bool tracksOnSession = false;
6037    if (!isGlobalSession) {
6038        tracksOnSession =
6039                playbackThread->hasAudioSession(mSessionId) & PlaybackThread::TRACK_SESSION;
6040    }
6041
6042    size_t size = mEffects.size();
6043    // do not process effect if no track is present in same audio session
6044    if (isGlobalSession || tracksOnSession) {
6045        for (size_t i = 0; i < size; i++) {
6046            mEffects[i]->process();
6047        }
6048    }
6049    for (size_t i = 0; i < size; i++) {
6050        mEffects[i]->updateState();
6051    }
6052    // if no track is active, input buffer must be cleared here as the mixer process
6053    // will not do it
6054    if (tracksOnSession &&
6055        activeTracks() == 0) {
6056        size_t numSamples = playbackThread->frameCount() * playbackThread->channelCount();
6057        memset(mInBuffer, 0, numSamples * sizeof(int16_t));
6058    }
6059}
6060
6061// addEffect_l() must be called with PlaybackThread::mLock held
6062status_t AudioFlinger::EffectChain::addEffect_l(const sp<EffectModule>& effect)
6063{
6064    effect_descriptor_t desc = effect->desc();
6065    uint32_t insertPref = desc.flags & EFFECT_FLAG_INSERT_MASK;
6066
6067    Mutex::Autolock _l(mLock);
6068    effect->setChain(this);
6069    sp<ThreadBase> thread = mThread.promote();
6070    if (thread == 0) {
6071        return NO_INIT;
6072    }
6073    effect->setThread(thread);
6074
6075    if ((desc.flags & EFFECT_FLAG_TYPE_MASK) == EFFECT_FLAG_TYPE_AUXILIARY) {
6076        // Auxiliary effects are inserted at the beginning of mEffects vector as
6077        // they are processed first and accumulated in chain input buffer
6078        mEffects.insertAt(effect, 0);
6079
6080        // the input buffer for auxiliary effect contains mono samples in
6081        // 32 bit format. This is to avoid saturation in AudoMixer
6082        // accumulation stage. Saturation is done in EffectModule::process() before
6083        // calling the process in effect engine
6084        size_t numSamples = thread->frameCount();
6085        int32_t *buffer = new int32_t[numSamples];
6086        memset(buffer, 0, numSamples * sizeof(int32_t));
6087        effect->setInBuffer((int16_t *)buffer);
6088        // auxiliary effects output samples to chain input buffer for further processing
6089        // by insert effects
6090        effect->setOutBuffer(mInBuffer);
6091    } else {
6092        // Insert effects are inserted at the end of mEffects vector as they are processed
6093        //  after track and auxiliary effects.
6094        // Insert effect order as a function of indicated preference:
6095        //  if EFFECT_FLAG_INSERT_EXCLUSIVE, insert in first position or reject if
6096        //  another effect is present
6097        //  else if EFFECT_FLAG_INSERT_FIRST, insert in first position or after the
6098        //  last effect claiming first position
6099        //  else if EFFECT_FLAG_INSERT_LAST, insert in last position or before the
6100        //  first effect claiming last position
6101        //  else if EFFECT_FLAG_INSERT_ANY insert after first or before last
6102        // Reject insertion if an effect with EFFECT_FLAG_INSERT_EXCLUSIVE is
6103        // already present
6104
6105        int size = (int)mEffects.size();
6106        int idx_insert = size;
6107        int idx_insert_first = -1;
6108        int idx_insert_last = -1;
6109
6110        for (int i = 0; i < size; i++) {
6111            effect_descriptor_t d = mEffects[i]->desc();
6112            uint32_t iMode = d.flags & EFFECT_FLAG_TYPE_MASK;
6113            uint32_t iPref = d.flags & EFFECT_FLAG_INSERT_MASK;
6114            if (iMode == EFFECT_FLAG_TYPE_INSERT) {
6115                // check invalid effect chaining combinations
6116                if (insertPref == EFFECT_FLAG_INSERT_EXCLUSIVE ||
6117                    iPref == EFFECT_FLAG_INSERT_EXCLUSIVE) {
6118                    LOGW("addEffect_l() could not insert effect %s: exclusive conflict with %s", desc.name, d.name);
6119                    return INVALID_OPERATION;
6120                }
6121                // remember position of first insert effect and by default
6122                // select this as insert position for new effect
6123                if (idx_insert == size) {
6124                    idx_insert = i;
6125                }
6126                // remember position of last insert effect claiming
6127                // first position
6128                if (iPref == EFFECT_FLAG_INSERT_FIRST) {
6129                    idx_insert_first = i;
6130                }
6131                // remember position of first insert effect claiming
6132                // last position
6133                if (iPref == EFFECT_FLAG_INSERT_LAST &&
6134                    idx_insert_last == -1) {
6135                    idx_insert_last = i;
6136                }
6137            }
6138        }
6139
6140        // modify idx_insert from first position if needed
6141        if (insertPref == EFFECT_FLAG_INSERT_LAST) {
6142            if (idx_insert_last != -1) {
6143                idx_insert = idx_insert_last;
6144            } else {
6145                idx_insert = size;
6146            }
6147        } else {
6148            if (idx_insert_first != -1) {
6149                idx_insert = idx_insert_first + 1;
6150            }
6151        }
6152
6153        // always read samples from chain input buffer
6154        effect->setInBuffer(mInBuffer);
6155
6156        // if last effect in the chain, output samples to chain
6157        // output buffer, otherwise to chain input buffer
6158        if (idx_insert == size) {
6159            if (idx_insert != 0) {
6160                mEffects[idx_insert-1]->setOutBuffer(mInBuffer);
6161                mEffects[idx_insert-1]->configure();
6162            }
6163            effect->setOutBuffer(mOutBuffer);
6164        } else {
6165            effect->setOutBuffer(mInBuffer);
6166        }
6167        mEffects.insertAt(effect, idx_insert);
6168
6169        LOGV("addEffect_l() effect %p, added in chain %p at rank %d", effect.get(), this, idx_insert);
6170    }
6171    effect->configure();
6172    return NO_ERROR;
6173}
6174
6175// removeEffect_l() must be called with PlaybackThread::mLock held
6176size_t AudioFlinger::EffectChain::removeEffect_l(const sp<EffectModule>& effect)
6177{
6178    Mutex::Autolock _l(mLock);
6179    int size = (int)mEffects.size();
6180    int i;
6181    uint32_t type = effect->desc().flags & EFFECT_FLAG_TYPE_MASK;
6182
6183    for (i = 0; i < size; i++) {
6184        if (effect == mEffects[i]) {
6185            if (type == EFFECT_FLAG_TYPE_AUXILIARY) {
6186                delete[] effect->inBuffer();
6187            } else {
6188                if (i == size - 1 && i != 0) {
6189                    mEffects[i - 1]->setOutBuffer(mOutBuffer);
6190                    mEffects[i - 1]->configure();
6191                }
6192            }
6193            mEffects.removeAt(i);
6194            LOGV("removeEffect_l() effect %p, removed from chain %p at rank %d", effect.get(), this, i);
6195            break;
6196        }
6197    }
6198
6199    return mEffects.size();
6200}
6201
6202// setDevice_l() must be called with PlaybackThread::mLock held
6203void AudioFlinger::EffectChain::setDevice_l(uint32_t device)
6204{
6205    size_t size = mEffects.size();
6206    for (size_t i = 0; i < size; i++) {
6207        mEffects[i]->setDevice(device);
6208    }
6209}
6210
6211// setMode_l() must be called with PlaybackThread::mLock held
6212void AudioFlinger::EffectChain::setMode_l(uint32_t mode)
6213{
6214    size_t size = mEffects.size();
6215    for (size_t i = 0; i < size; i++) {
6216        mEffects[i]->setMode(mode);
6217    }
6218}
6219
6220// setVolume_l() must be called with PlaybackThread::mLock held
6221bool AudioFlinger::EffectChain::setVolume_l(uint32_t *left, uint32_t *right)
6222{
6223    uint32_t newLeft = *left;
6224    uint32_t newRight = *right;
6225    bool hasControl = false;
6226    int ctrlIdx = -1;
6227    size_t size = mEffects.size();
6228
6229    // first update volume controller
6230    for (size_t i = size; i > 0; i--) {
6231        if (mEffects[i - 1]->isProcessEnabled() &&
6232            (mEffects[i - 1]->desc().flags & EFFECT_FLAG_VOLUME_MASK) == EFFECT_FLAG_VOLUME_CTRL) {
6233            ctrlIdx = i - 1;
6234            hasControl = true;
6235            break;
6236        }
6237    }
6238
6239    if (ctrlIdx == mVolumeCtrlIdx && *left == mLeftVolume && *right == mRightVolume) {
6240        if (hasControl) {
6241            *left = mNewLeftVolume;
6242            *right = mNewRightVolume;
6243        }
6244        return hasControl;
6245    }
6246
6247    mVolumeCtrlIdx = ctrlIdx;
6248    mLeftVolume = newLeft;
6249    mRightVolume = newRight;
6250
6251    // second get volume update from volume controller
6252    if (ctrlIdx >= 0) {
6253        mEffects[ctrlIdx]->setVolume(&newLeft, &newRight, true);
6254        mNewLeftVolume = newLeft;
6255        mNewRightVolume = newRight;
6256    }
6257    // then indicate volume to all other effects in chain.
6258    // Pass altered volume to effects before volume controller
6259    // and requested volume to effects after controller
6260    uint32_t lVol = newLeft;
6261    uint32_t rVol = newRight;
6262
6263    for (size_t i = 0; i < size; i++) {
6264        if ((int)i == ctrlIdx) continue;
6265        // this also works for ctrlIdx == -1 when there is no volume controller
6266        if ((int)i > ctrlIdx) {
6267            lVol = *left;
6268            rVol = *right;
6269        }
6270        mEffects[i]->setVolume(&lVol, &rVol, false);
6271    }
6272    *left = newLeft;
6273    *right = newRight;
6274
6275    return hasControl;
6276}
6277
6278status_t AudioFlinger::EffectChain::dump(int fd, const Vector<String16>& args)
6279{
6280    const size_t SIZE = 256;
6281    char buffer[SIZE];
6282    String8 result;
6283
6284    snprintf(buffer, SIZE, "Effects for session %d:\n", mSessionId);
6285    result.append(buffer);
6286
6287    bool locked = tryLock(mLock);
6288    // failed to lock - AudioFlinger is probably deadlocked
6289    if (!locked) {
6290        result.append("\tCould not lock mutex:\n");
6291    }
6292
6293    result.append("\tNum fx In buffer   Out buffer   Active tracks:\n");
6294    snprintf(buffer, SIZE, "\t%02d     0x%08x  0x%08x   %d\n",
6295            mEffects.size(),
6296            (uint32_t)mInBuffer,
6297            (uint32_t)mOutBuffer,
6298            mActiveTrackCnt);
6299    result.append(buffer);
6300    write(fd, result.string(), result.size());
6301
6302    for (size_t i = 0; i < mEffects.size(); ++i) {
6303        sp<EffectModule> effect = mEffects[i];
6304        if (effect != 0) {
6305            effect->dump(fd, args);
6306        }
6307    }
6308
6309    if (locked) {
6310        mLock.unlock();
6311    }
6312
6313    return NO_ERROR;
6314}
6315
6316#undef LOG_TAG
6317#define LOG_TAG "AudioFlinger"
6318
6319// ----------------------------------------------------------------------------
6320
6321status_t AudioFlinger::onTransact(
6322        uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
6323{
6324    return BnAudioFlinger::onTransact(code, data, reply, flags);
6325}
6326
6327}; // namespace android
6328