NuPlayerRenderer.cpp revision 7d05308b16a688436331de2e94d89e46d05d8d1d 
1/*
2 * Copyright (C) 2010 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17//#define LOG_NDEBUG 0
18#define LOG_TAG "NuPlayerRenderer"
19#include <utils/Log.h>
20
21#include "NuPlayerRenderer.h"
22#include <cutils/properties.h>
23#include <media/stagefright/foundation/ABuffer.h>
24#include <media/stagefright/foundation/ADebug.h>
25#include <media/stagefright/foundation/AMessage.h>
26#include <media/stagefright/foundation/AUtils.h>
27#include <media/stagefright/foundation/AWakeLock.h>
28#include <media/stagefright/MediaClock.h>
29#include <media/stagefright/MediaErrors.h>
30#include <media/stagefright/MetaData.h>
31#include <media/stagefright/Utils.h>
32#include <media/stagefright/VideoFrameScheduler.h>
33
34#include <inttypes.h>
35
36namespace android {
37
38/*
39 * Example of common configuration settings in shell script form
40
41   #Turn offload audio off (use PCM for Play Music) -- AudioPolicyManager
42   adb shell setprop audio.offload.disable 1
43
44   #Allow offload audio with video (requires offloading to be enabled) -- AudioPolicyManager
45   adb shell setprop audio.offload.video 1
46
47   #Use audio callbacks for PCM data
48   adb shell setprop media.stagefright.audio.cbk 1
49
50   #Use deep buffer for PCM data with video (it is generally enabled for audio-only)
51   adb shell setprop media.stagefright.audio.deep 1
52
53   #Set size of buffers for pcm audio sink in msec (example: 1000 msec)
54   adb shell setprop media.stagefright.audio.sink 1000
55
56 * These configurations take effect for the next track played (not the current track).
57 */
58
59static inline bool getUseAudioCallbackSetting() {
60    return property_get_bool("media.stagefright.audio.cbk", false /* default_value */);
61}
62
63static inline int32_t getAudioSinkPcmMsSetting() {
64    return property_get_int32(
65            "media.stagefright.audio.sink", 500 /* default_value */);
66}
67
68// Maximum time in paused state when offloading audio decompression. When elapsed, the AudioSink
69// is closed to allow the audio DSP to power down.
70static const int64_t kOffloadPauseMaxUs = 10000000ll;
71
72// static
73const NuPlayer::Renderer::PcmInfo NuPlayer::Renderer::AUDIO_PCMINFO_INITIALIZER = {
74        AUDIO_CHANNEL_NONE,
75        AUDIO_OUTPUT_FLAG_NONE,
76        AUDIO_FORMAT_INVALID,
77        0, // mNumChannels
78        0 // mSampleRate
79};
80
81// static
82const int64_t NuPlayer::Renderer::kMinPositionUpdateDelayUs = 100000ll;
83
84NuPlayer::Renderer::Renderer(
85        const sp<MediaPlayerBase::AudioSink> &sink,
86        const sp<AMessage> &notify,
87        uint32_t flags)
88    : mAudioSink(sink),
89      mNotify(notify),
90      mFlags(flags),
91      mNumFramesWritten(0),
92      mDrainAudioQueuePending(false),
93      mDrainVideoQueuePending(false),
94      mAudioQueueGeneration(0),
95      mVideoQueueGeneration(0),
96      mAudioDrainGeneration(0),
97      mVideoDrainGeneration(0),
98      mPlaybackSettings(AUDIO_PLAYBACK_RATE_DEFAULT),
99      mAudioFirstAnchorTimeMediaUs(-1),
100      mAnchorTimeMediaUs(-1),
101      mAnchorNumFramesWritten(-1),
102      mVideoLateByUs(0ll),
103      mHasAudio(false),
104      mHasVideo(false),
105      mNotifyCompleteAudio(false),
106      mNotifyCompleteVideo(false),
107      mSyncQueues(false),
108      mPaused(false),
109      mPauseDrainAudioAllowedUs(0),
110      mVideoSampleReceived(false),
111      mVideoRenderingStarted(false),
112      mVideoRenderingStartGeneration(0),
113      mAudioRenderingStartGeneration(0),
114      mAudioOffloadPauseTimeoutGeneration(0),
115      mAudioTornDown(false),
116      mCurrentOffloadInfo(AUDIO_INFO_INITIALIZER),
117      mCurrentPcmInfo(AUDIO_PCMINFO_INITIALIZER),
118      mTotalBuffersQueued(0),
119      mLastAudioBufferDrained(0),
120      mUseAudioCallback(false),
121      mWakeLock(new AWakeLock()) {
122    mMediaClock = new MediaClock;
123    mPlaybackRate = mPlaybackSettings.mSpeed;
124    mMediaClock->setPlaybackRate(mPlaybackRate);
125}
126
127NuPlayer::Renderer::~Renderer() {
128    if (offloadingAudio()) {
129        mAudioSink->stop();
130        mAudioSink->flush();
131        mAudioSink->close();
132    }
133}
134
135void NuPlayer::Renderer::queueBuffer(
136        bool audio,
137        const sp<ABuffer> &buffer,
138        const sp<AMessage> &notifyConsumed) {
139    sp<AMessage> msg = new AMessage(kWhatQueueBuffer, this);
140    msg->setInt32("queueGeneration", getQueueGeneration(audio));
141    msg->setInt32("audio", static_cast<int32_t>(audio));
142    msg->setBuffer("buffer", buffer);
143    msg->setMessage("notifyConsumed", notifyConsumed);
144    msg->post();
145}
146
147void NuPlayer::Renderer::queueEOS(bool audio, status_t finalResult) {
148    CHECK_NE(finalResult, (status_t)OK);
149
150    sp<AMessage> msg = new AMessage(kWhatQueueEOS, this);
151    msg->setInt32("queueGeneration", getQueueGeneration(audio));
152    msg->setInt32("audio", static_cast<int32_t>(audio));
153    msg->setInt32("finalResult", finalResult);
154    msg->post();
155}
156
157status_t NuPlayer::Renderer::setPlaybackSettings(const AudioPlaybackRate &rate) {
158    sp<AMessage> msg = new AMessage(kWhatConfigPlayback, this);
159    writeToAMessage(msg, rate);
160    sp<AMessage> response;
161    status_t err = msg->postAndAwaitResponse(&response);
162    if (err == OK && response != NULL) {
163        CHECK(response->findInt32("err", &err));
164    }
165    return err;
166}
167
168status_t NuPlayer::Renderer::onConfigPlayback(const AudioPlaybackRate &rate /* sanitized */) {
169    if (rate.mSpeed == 0.f) {
170        onPause();
171        // don't call audiosink's setPlaybackRate if pausing, as pitch does not
172        // have to correspond to the any non-0 speed (e.g old speed). Keep
173        // settings nonetheless, using the old speed, in case audiosink changes.
174        AudioPlaybackRate newRate = rate;
175        newRate.mSpeed = mPlaybackSettings.mSpeed;
176        mPlaybackSettings = newRate;
177        return OK;
178    }
179
180    if (mAudioSink != NULL && mAudioSink->ready()) {
181        status_t err = mAudioSink->setPlaybackRate(rate);
182        if (err != OK) {
183            return err;
184        }
185    }
186    mPlaybackSettings = rate;
187    mPlaybackRate = rate.mSpeed;
188    mMediaClock->setPlaybackRate(mPlaybackRate);
189    return OK;
190}
191
192status_t NuPlayer::Renderer::getPlaybackSettings(AudioPlaybackRate *rate /* nonnull */) {
193    sp<AMessage> msg = new AMessage(kWhatGetPlaybackSettings, this);
194    sp<AMessage> response;
195    status_t err = msg->postAndAwaitResponse(&response);
196    if (err == OK && response != NULL) {
197        CHECK(response->findInt32("err", &err));
198        if (err == OK) {
199            readFromAMessage(response, rate);
200        }
201    }
202    return err;
203}
204
205status_t NuPlayer::Renderer::onGetPlaybackSettings(AudioPlaybackRate *rate /* nonnull */) {
206    if (mAudioSink != NULL && mAudioSink->ready()) {
207        status_t err = mAudioSink->getPlaybackRate(rate);
208        if (err == OK) {
209            if (!isAudioPlaybackRateEqual(*rate, mPlaybackSettings)) {
210                ALOGW("correcting mismatch in internal/external playback rate");
211            }
212            // get playback settings used by audiosink, as it may be
213            // slightly off due to audiosink not taking small changes.
214            mPlaybackSettings = *rate;
215            if (mPaused) {
216                rate->mSpeed = 0.f;
217            }
218        }
219        return err;
220    }
221    *rate = mPlaybackSettings;
222    return OK;
223}
224
225status_t NuPlayer::Renderer::setSyncSettings(const AVSyncSettings &sync, float videoFpsHint) {
226    sp<AMessage> msg = new AMessage(kWhatConfigSync, this);
227    writeToAMessage(msg, sync, videoFpsHint);
228    sp<AMessage> response;
229    status_t err = msg->postAndAwaitResponse(&response);
230    if (err == OK && response != NULL) {
231        CHECK(response->findInt32("err", &err));
232    }
233    return err;
234}
235
236status_t NuPlayer::Renderer::onConfigSync(const AVSyncSettings &sync, float videoFpsHint __unused) {
237    if (sync.mSource != AVSYNC_SOURCE_DEFAULT) {
238        return BAD_VALUE;
239    }
240    // TODO: support sync sources
241    return INVALID_OPERATION;
242}
243
244status_t NuPlayer::Renderer::getSyncSettings(AVSyncSettings *sync, float *videoFps) {
245    sp<AMessage> msg = new AMessage(kWhatGetSyncSettings, this);
246    sp<AMessage> response;
247    status_t err = msg->postAndAwaitResponse(&response);
248    if (err == OK && response != NULL) {
249        CHECK(response->findInt32("err", &err));
250        if (err == OK) {
251            readFromAMessage(response, sync, videoFps);
252        }
253    }
254    return err;
255}
256
257status_t NuPlayer::Renderer::onGetSyncSettings(
258        AVSyncSettings *sync /* nonnull */, float *videoFps /* nonnull */) {
259    *sync = mSyncSettings;
260    *videoFps = -1.f;
261    return OK;
262}
263
264void NuPlayer::Renderer::flush(bool audio, bool notifyComplete) {
265    {
266        Mutex::Autolock autoLock(mLock);
267        if (audio) {
268            mNotifyCompleteAudio |= notifyComplete;
269            clearAudioFirstAnchorTime_l();
270            ++mAudioQueueGeneration;
271            ++mAudioDrainGeneration;
272        } else {
273            mNotifyCompleteVideo |= notifyComplete;
274            ++mVideoQueueGeneration;
275            ++mVideoDrainGeneration;
276        }
277
278        clearAnchorTime_l();
279        mVideoLateByUs = 0;
280        mSyncQueues = false;
281    }
282
283    sp<AMessage> msg = new AMessage(kWhatFlush, this);
284    msg->setInt32("audio", static_cast<int32_t>(audio));
285    msg->post();
286}
287
288void NuPlayer::Renderer::signalTimeDiscontinuity() {
289}
290
291void NuPlayer::Renderer::signalDisableOffloadAudio() {
292    (new AMessage(kWhatDisableOffloadAudio, this))->post();
293}
294
295void NuPlayer::Renderer::signalEnableOffloadAudio() {
296    (new AMessage(kWhatEnableOffloadAudio, this))->post();
297}
298
299void NuPlayer::Renderer::pause() {
300    (new AMessage(kWhatPause, this))->post();
301}
302
303void NuPlayer::Renderer::resume() {
304    (new AMessage(kWhatResume, this))->post();
305}
306
307void NuPlayer::Renderer::setVideoFrameRate(float fps) {
308    sp<AMessage> msg = new AMessage(kWhatSetVideoFrameRate, this);
309    msg->setFloat("frame-rate", fps);
310    msg->post();
311}
312
313// Called on any threads.
314status_t NuPlayer::Renderer::getCurrentPosition(int64_t *mediaUs) {
315    return mMediaClock->getMediaTime(ALooper::GetNowUs(), mediaUs);
316}
317
318void NuPlayer::Renderer::clearAudioFirstAnchorTime_l() {
319    mAudioFirstAnchorTimeMediaUs = -1;
320    mMediaClock->setStartingTimeMedia(-1);
321}
322
323void NuPlayer::Renderer::setAudioFirstAnchorTimeIfNeeded_l(int64_t mediaUs) {
324    if (mAudioFirstAnchorTimeMediaUs == -1) {
325        mAudioFirstAnchorTimeMediaUs = mediaUs;
326        mMediaClock->setStartingTimeMedia(mediaUs);
327    }
328}
329
330void NuPlayer::Renderer::clearAnchorTime_l() {
331    mMediaClock->clearAnchor();
332    mAnchorTimeMediaUs = -1;
333    mAnchorNumFramesWritten = -1;
334}
335
336void NuPlayer::Renderer::setVideoLateByUs(int64_t lateUs) {
337    Mutex::Autolock autoLock(mLock);
338    mVideoLateByUs = lateUs;
339}
340
341int64_t NuPlayer::Renderer::getVideoLateByUs() {
342    Mutex::Autolock autoLock(mLock);
343    return mVideoLateByUs;
344}
345
346status_t NuPlayer::Renderer::openAudioSink(
347        const sp<AMessage> &format,
348        bool offloadOnly,
349        bool hasVideo,
350        uint32_t flags,
351        bool *isOffloaded) {
352    sp<AMessage> msg = new AMessage(kWhatOpenAudioSink, this);
353    msg->setMessage("format", format);
354    msg->setInt32("offload-only", offloadOnly);
355    msg->setInt32("has-video", hasVideo);
356    msg->setInt32("flags", flags);
357
358    sp<AMessage> response;
359    msg->postAndAwaitResponse(&response);
360
361    int32_t err;
362    if (!response->findInt32("err", &err)) {
363        err = INVALID_OPERATION;
364    } else if (err == OK && isOffloaded != NULL) {
365        int32_t offload;
366        CHECK(response->findInt32("offload", &offload));
367        *isOffloaded = (offload != 0);
368    }
369    return err;
370}
371
372void NuPlayer::Renderer::closeAudioSink() {
373    sp<AMessage> msg = new AMessage(kWhatCloseAudioSink, this);
374
375    sp<AMessage> response;
376    msg->postAndAwaitResponse(&response);
377}
378
379void NuPlayer::Renderer::onMessageReceived(const sp<AMessage> &msg) {
380    switch (msg->what()) {
381        case kWhatOpenAudioSink:
382        {
383            sp<AMessage> format;
384            CHECK(msg->findMessage("format", &format));
385
386            int32_t offloadOnly;
387            CHECK(msg->findInt32("offload-only", &offloadOnly));
388
389            int32_t hasVideo;
390            CHECK(msg->findInt32("has-video", &hasVideo));
391
392            uint32_t flags;
393            CHECK(msg->findInt32("flags", (int32_t *)&flags));
394
395            status_t err = onOpenAudioSink(format, offloadOnly, hasVideo, flags);
396
397            sp<AMessage> response = new AMessage;
398            response->setInt32("err", err);
399            response->setInt32("offload", offloadingAudio());
400
401            sp<AReplyToken> replyID;
402            CHECK(msg->senderAwaitsResponse(&replyID));
403            response->postReply(replyID);
404
405            break;
406        }
407
408        case kWhatCloseAudioSink:
409        {
410            sp<AReplyToken> replyID;
411            CHECK(msg->senderAwaitsResponse(&replyID));
412
413            onCloseAudioSink();
414
415            sp<AMessage> response = new AMessage;
416            response->postReply(replyID);
417            break;
418        }
419
420        case kWhatStopAudioSink:
421        {
422            mAudioSink->stop();
423            break;
424        }
425
426        case kWhatDrainAudioQueue:
427        {
428            mDrainAudioQueuePending = false;
429
430            int32_t generation;
431            CHECK(msg->findInt32("drainGeneration", &generation));
432            if (generation != getDrainGeneration(true /* audio */)) {
433                break;
434            }
435
436            if (onDrainAudioQueue()) {
437                uint32_t numFramesPlayed;
438                CHECK_EQ(mAudioSink->getPosition(&numFramesPlayed),
439                         (status_t)OK);
440
441                uint32_t numFramesPendingPlayout =
442                    mNumFramesWritten - numFramesPlayed;
443
444                // This is how long the audio sink will have data to
445                // play back.
446                int64_t delayUs =
447                    mAudioSink->msecsPerFrame()
448                        * numFramesPendingPlayout * 1000ll;
449                if (mPlaybackRate > 1.0f) {
450                    delayUs /= mPlaybackRate;
451                }
452
453                // Let's give it more data after about half that time
454                // has elapsed.
455                Mutex::Autolock autoLock(mLock);
456                postDrainAudioQueue_l(delayUs / 2);
457            }
458            break;
459        }
460
461        case kWhatDrainVideoQueue:
462        {
463            int32_t generation;
464            CHECK(msg->findInt32("drainGeneration", &generation));
465            if (generation != getDrainGeneration(false /* audio */)) {
466                break;
467            }
468
469            mDrainVideoQueuePending = false;
470
471            onDrainVideoQueue();
472
473            postDrainVideoQueue();
474            break;
475        }
476
477        case kWhatPostDrainVideoQueue:
478        {
479            int32_t generation;
480            CHECK(msg->findInt32("drainGeneration", &generation));
481            if (generation != getDrainGeneration(false /* audio */)) {
482                break;
483            }
484
485            mDrainVideoQueuePending = false;
486            postDrainVideoQueue();
487            break;
488        }
489
490        case kWhatQueueBuffer:
491        {
492            onQueueBuffer(msg);
493            break;
494        }
495
496        case kWhatQueueEOS:
497        {
498            onQueueEOS(msg);
499            break;
500        }
501
502        case kWhatConfigPlayback:
503        {
504            sp<AReplyToken> replyID;
505            CHECK(msg->senderAwaitsResponse(&replyID));
506            AudioPlaybackRate rate;
507            readFromAMessage(msg, &rate);
508            status_t err = onConfigPlayback(rate);
509            sp<AMessage> response = new AMessage;
510            response->setInt32("err", err);
511            response->postReply(replyID);
512            break;
513        }
514
515        case kWhatGetPlaybackSettings:
516        {
517            sp<AReplyToken> replyID;
518            CHECK(msg->senderAwaitsResponse(&replyID));
519            AudioPlaybackRate rate = AUDIO_PLAYBACK_RATE_DEFAULT;
520            status_t err = onGetPlaybackSettings(&rate);
521            sp<AMessage> response = new AMessage;
522            if (err == OK) {
523                writeToAMessage(response, rate);
524            }
525            response->setInt32("err", err);
526            response->postReply(replyID);
527            break;
528        }
529
530        case kWhatConfigSync:
531        {
532            sp<AReplyToken> replyID;
533            CHECK(msg->senderAwaitsResponse(&replyID));
534            AVSyncSettings sync;
535            float videoFpsHint;
536            readFromAMessage(msg, &sync, &videoFpsHint);
537            status_t err = onConfigSync(sync, videoFpsHint);
538            sp<AMessage> response = new AMessage;
539            response->setInt32("err", err);
540            response->postReply(replyID);
541            break;
542        }
543
544        case kWhatGetSyncSettings:
545        {
546            sp<AReplyToken> replyID;
547            CHECK(msg->senderAwaitsResponse(&replyID));
548
549            ALOGV("kWhatGetSyncSettings");
550            AVSyncSettings sync;
551            float videoFps = -1.f;
552            status_t err = onGetSyncSettings(&sync, &videoFps);
553            sp<AMessage> response = new AMessage;
554            if (err == OK) {
555                writeToAMessage(response, sync, videoFps);
556            }
557            response->setInt32("err", err);
558            response->postReply(replyID);
559            break;
560        }
561
562        case kWhatFlush:
563        {
564            onFlush(msg);
565            break;
566        }
567
568        case kWhatDisableOffloadAudio:
569        {
570            onDisableOffloadAudio();
571            break;
572        }
573
574        case kWhatEnableOffloadAudio:
575        {
576            onEnableOffloadAudio();
577            break;
578        }
579
580        case kWhatPause:
581        {
582            onPause();
583            break;
584        }
585
586        case kWhatResume:
587        {
588            onResume();
589            break;
590        }
591
592        case kWhatSetVideoFrameRate:
593        {
594            float fps;
595            CHECK(msg->findFloat("frame-rate", &fps));
596            onSetVideoFrameRate(fps);
597            break;
598        }
599
600        case kWhatAudioTearDown:
601        {
602            onAudioTearDown(kDueToError);
603            break;
604        }
605
606        case kWhatAudioOffloadPauseTimeout:
607        {
608            int32_t generation;
609            CHECK(msg->findInt32("drainGeneration", &generation));
610            if (generation != mAudioOffloadPauseTimeoutGeneration) {
611                break;
612            }
613            ALOGV("Audio Offload tear down due to pause timeout.");
614            onAudioTearDown(kDueToTimeout);
615            mWakeLock->release();
616            break;
617        }
618
619        default:
620            TRESPASS();
621            break;
622    }
623}
624
625void NuPlayer::Renderer::postDrainAudioQueue_l(int64_t delayUs) {
626    if (mDrainAudioQueuePending || mSyncQueues || mUseAudioCallback) {
627        return;
628    }
629
630    if (mAudioQueue.empty()) {
631        return;
632    }
633
634    // FIXME: if paused, wait until AudioTrack stop() is complete before delivering data.
635    if (mPaused) {
636        const int64_t diffUs = mPauseDrainAudioAllowedUs - ALooper::GetNowUs();
637        if (diffUs > delayUs) {
638            delayUs = diffUs;
639        }
640    }
641
642    mDrainAudioQueuePending = true;
643    sp<AMessage> msg = new AMessage(kWhatDrainAudioQueue, this);
644    msg->setInt32("drainGeneration", mAudioDrainGeneration);
645    msg->post(delayUs);
646}
647
648void NuPlayer::Renderer::prepareForMediaRenderingStart_l() {
649    mAudioRenderingStartGeneration = mAudioDrainGeneration;
650    mVideoRenderingStartGeneration = mVideoDrainGeneration;
651}
652
653void NuPlayer::Renderer::notifyIfMediaRenderingStarted_l() {
654    if (mVideoRenderingStartGeneration == mVideoDrainGeneration &&
655        mAudioRenderingStartGeneration == mAudioDrainGeneration) {
656        mVideoRenderingStartGeneration = -1;
657        mAudioRenderingStartGeneration = -1;
658
659        sp<AMessage> notify = mNotify->dup();
660        notify->setInt32("what", kWhatMediaRenderingStart);
661        notify->post();
662    }
663}
664
665// static
666size_t NuPlayer::Renderer::AudioSinkCallback(
667        MediaPlayerBase::AudioSink * /* audioSink */,
668        void *buffer,
669        size_t size,
670        void *cookie,
671        MediaPlayerBase::AudioSink::cb_event_t event) {
672    NuPlayer::Renderer *me = (NuPlayer::Renderer *)cookie;
673
674    switch (event) {
675        case MediaPlayerBase::AudioSink::CB_EVENT_FILL_BUFFER:
676        {
677            return me->fillAudioBuffer(buffer, size);
678            break;
679        }
680
681        case MediaPlayerBase::AudioSink::CB_EVENT_STREAM_END:
682        {
683            ALOGV("AudioSink::CB_EVENT_STREAM_END");
684            me->notifyEOS(true /* audio */, ERROR_END_OF_STREAM);
685            break;
686        }
687
688        case MediaPlayerBase::AudioSink::CB_EVENT_TEAR_DOWN:
689        {
690            ALOGV("AudioSink::CB_EVENT_TEAR_DOWN");
691            me->notifyAudioTearDown();
692            break;
693        }
694    }
695
696    return 0;
697}
698
699size_t NuPlayer::Renderer::fillAudioBuffer(void *buffer, size_t size) {
700    Mutex::Autolock autoLock(mLock);
701
702    if (!mUseAudioCallback) {
703        return 0;
704    }
705
706    bool hasEOS = false;
707
708    size_t sizeCopied = 0;
709    bool firstEntry = true;
710    QueueEntry *entry;  // will be valid after while loop if hasEOS is set.
711    while (sizeCopied < size && !mAudioQueue.empty()) {
712        entry = &*mAudioQueue.begin();
713
714        if (entry->mBuffer == NULL) { // EOS
715            hasEOS = true;
716            mAudioQueue.erase(mAudioQueue.begin());
717            break;
718        }
719
720        if (firstEntry && entry->mOffset == 0) {
721            firstEntry = false;
722            int64_t mediaTimeUs;
723            CHECK(entry->mBuffer->meta()->findInt64("timeUs", &mediaTimeUs));
724            ALOGV("fillAudioBuffer: rendering audio at media time %.2f secs", mediaTimeUs / 1E6);
725            setAudioFirstAnchorTimeIfNeeded_l(mediaTimeUs);
726        }
727
728        size_t copy = entry->mBuffer->size() - entry->mOffset;
729        size_t sizeRemaining = size - sizeCopied;
730        if (copy > sizeRemaining) {
731            copy = sizeRemaining;
732        }
733
734        memcpy((char *)buffer + sizeCopied,
735               entry->mBuffer->data() + entry->mOffset,
736               copy);
737
738        entry->mOffset += copy;
739        if (entry->mOffset == entry->mBuffer->size()) {
740            entry->mNotifyConsumed->post();
741            mAudioQueue.erase(mAudioQueue.begin());
742            entry = NULL;
743        }
744        sizeCopied += copy;
745
746        notifyIfMediaRenderingStarted_l();
747    }
748
749    if (mAudioFirstAnchorTimeMediaUs >= 0) {
750        int64_t nowUs = ALooper::GetNowUs();
751        int64_t nowMediaUs =
752            mAudioFirstAnchorTimeMediaUs + getPlayedOutAudioDurationUs(nowUs);
753        // we don't know how much data we are queueing for offloaded tracks.
754        mMediaClock->updateAnchor(nowMediaUs, nowUs, INT64_MAX);
755    }
756
757    // for non-offloaded audio, we need to compute the frames written because
758    // there is no EVENT_STREAM_END notification. The frames written gives
759    // an estimate on the pending played out duration.
760    if (!offloadingAudio()) {
761        mNumFramesWritten += sizeCopied / mAudioSink->frameSize();
762    }
763
764    if (hasEOS) {
765        (new AMessage(kWhatStopAudioSink, this))->post();
766        // As there is currently no EVENT_STREAM_END callback notification for
767        // non-offloaded audio tracks, we need to post the EOS ourselves.
768        if (!offloadingAudio()) {
769            int64_t postEOSDelayUs = 0;
770            if (mAudioSink->needsTrailingPadding()) {
771                postEOSDelayUs = getPendingAudioPlayoutDurationUs(ALooper::GetNowUs());
772            }
773            ALOGV("fillAudioBuffer: notifyEOS "
774                    "mNumFramesWritten:%u  finalResult:%d  postEOSDelay:%lld",
775                    mNumFramesWritten, entry->mFinalResult, (long long)postEOSDelayUs);
776            notifyEOS(true /* audio */, entry->mFinalResult, postEOSDelayUs);
777        }
778    }
779    return sizeCopied;
780}
781
782void NuPlayer::Renderer::drainAudioQueueUntilLastEOS() {
783    List<QueueEntry>::iterator it = mAudioQueue.begin(), itEOS = it;
784    bool foundEOS = false;
785    while (it != mAudioQueue.end()) {
786        int32_t eos;
787        QueueEntry *entry = &*it++;
788        if (entry->mBuffer == NULL
789                || (entry->mNotifyConsumed->findInt32("eos", &eos) && eos != 0)) {
790            itEOS = it;
791            foundEOS = true;
792        }
793    }
794
795    if (foundEOS) {
796        // post all replies before EOS and drop the samples
797        for (it = mAudioQueue.begin(); it != itEOS; it++) {
798            if (it->mBuffer == NULL) {
799                // delay doesn't matter as we don't even have an AudioTrack
800                notifyEOS(true /* audio */, it->mFinalResult);
801            } else {
802                it->mNotifyConsumed->post();
803            }
804        }
805        mAudioQueue.erase(mAudioQueue.begin(), itEOS);
806    }
807}
808
809bool NuPlayer::Renderer::onDrainAudioQueue() {
810    // TODO: This call to getPosition checks if AudioTrack has been created
811    // in AudioSink before draining audio. If AudioTrack doesn't exist, then
812    // CHECKs on getPosition will fail.
813    // We still need to figure out why AudioTrack is not created when
814    // this function is called. One possible reason could be leftover
815    // audio. Another possible place is to check whether decoder
816    // has received INFO_FORMAT_CHANGED as the first buffer since
817    // AudioSink is opened there, and possible interactions with flush
818    // immediately after start. Investigate error message
819    // "vorbis_dsp_synthesis returned -135", along with RTSP.
820    uint32_t numFramesPlayed;
821    if (mAudioSink->getPosition(&numFramesPlayed) != OK) {
822        // When getPosition fails, renderer will not reschedule the draining
823        // unless new samples are queued.
824        // If we have pending EOS (or "eos" marker for discontinuities), we need
825        // to post these now as NuPlayerDecoder might be waiting for it.
826        drainAudioQueueUntilLastEOS();
827
828        ALOGW("onDrainAudioQueue(): audio sink is not ready");
829        return false;
830    }
831
832#if 0
833    ssize_t numFramesAvailableToWrite =
834        mAudioSink->frameCount() - (mNumFramesWritten - numFramesPlayed);
835
836    if (numFramesAvailableToWrite == mAudioSink->frameCount()) {
837        ALOGI("audio sink underrun");
838    } else {
839        ALOGV("audio queue has %d frames left to play",
840             mAudioSink->frameCount() - numFramesAvailableToWrite);
841    }
842#endif
843
844    uint32_t prevFramesWritten = mNumFramesWritten;
845    while (!mAudioQueue.empty()) {
846        QueueEntry *entry = &*mAudioQueue.begin();
847
848        mLastAudioBufferDrained = entry->mBufferOrdinal;
849
850        if (entry->mBuffer == NULL) {
851            // EOS
852            int64_t postEOSDelayUs = 0;
853            if (mAudioSink->needsTrailingPadding()) {
854                postEOSDelayUs = getPendingAudioPlayoutDurationUs(ALooper::GetNowUs());
855            }
856            notifyEOS(true /* audio */, entry->mFinalResult, postEOSDelayUs);
857
858            mAudioQueue.erase(mAudioQueue.begin());
859            entry = NULL;
860            if (mAudioSink->needsTrailingPadding()) {
861                // If we're not in gapless playback (i.e. through setNextPlayer), we
862                // need to stop the track here, because that will play out the last
863                // little bit at the end of the file. Otherwise short files won't play.
864                mAudioSink->stop();
865                mNumFramesWritten = 0;
866            }
867            return false;
868        }
869
870        // ignore 0-sized buffer which could be EOS marker with no data
871        if (entry->mOffset == 0 && entry->mBuffer->size() > 0) {
872            int64_t mediaTimeUs;
873            CHECK(entry->mBuffer->meta()->findInt64("timeUs", &mediaTimeUs));
874            ALOGV("onDrainAudioQueue: rendering audio at media time %.2f secs",
875                    mediaTimeUs / 1E6);
876            onNewAudioMediaTime(mediaTimeUs);
877        }
878
879        size_t copy = entry->mBuffer->size() - entry->mOffset;
880
881        ssize_t written = mAudioSink->write(entry->mBuffer->data() + entry->mOffset,
882                                            copy, false /* blocking */);
883        if (written < 0) {
884            // An error in AudioSink write. Perhaps the AudioSink was not properly opened.
885            if (written == WOULD_BLOCK) {
886                ALOGV("AudioSink write would block when writing %zu bytes", copy);
887            } else {
888                ALOGE("AudioSink write error(%zd) when writing %zu bytes", written, copy);
889                notifyAudioTearDown();
890            }
891            break;
892        }
893
894        entry->mOffset += written;
895        if (entry->mOffset == entry->mBuffer->size()) {
896            entry->mNotifyConsumed->post();
897            mAudioQueue.erase(mAudioQueue.begin());
898
899            entry = NULL;
900        }
901
902        size_t copiedFrames = written / mAudioSink->frameSize();
903        mNumFramesWritten += copiedFrames;
904
905        {
906            Mutex::Autolock autoLock(mLock);
907            notifyIfMediaRenderingStarted_l();
908        }
909
910        if (written != (ssize_t)copy) {
911            // A short count was received from AudioSink::write()
912            //
913            // AudioSink write is called in non-blocking mode.
914            // It may return with a short count when:
915            //
916            // 1) Size to be copied is not a multiple of the frame size. We consider this fatal.
917            // 2) The data to be copied exceeds the available buffer in AudioSink.
918            // 3) An error occurs and data has been partially copied to the buffer in AudioSink.
919            // 4) AudioSink is an AudioCache for data retrieval, and the AudioCache is exceeded.
920
921            // (Case 1)
922            // Must be a multiple of the frame size.  If it is not a multiple of a frame size, it
923            // needs to fail, as we should not carry over fractional frames between calls.
924            CHECK_EQ(copy % mAudioSink->frameSize(), 0);
925
926            // (Case 2, 3, 4)
927            // Return early to the caller.
928            // Beware of calling immediately again as this may busy-loop if you are not careful.
929            ALOGV("AudioSink write short frame count %zd < %zu", written, copy);
930            break;
931        }
932    }
933    int64_t maxTimeMedia;
934    {
935        Mutex::Autolock autoLock(mLock);
936        maxTimeMedia =
937            mAnchorTimeMediaUs +
938                    (int64_t)(max((long long)mNumFramesWritten - mAnchorNumFramesWritten, 0LL)
939                            * 1000LL * mAudioSink->msecsPerFrame());
940    }
941    mMediaClock->updateMaxTimeMedia(maxTimeMedia);
942
943    // calculate whether we need to reschedule another write.
944    bool reschedule = !mAudioQueue.empty()
945            && (!mPaused
946                || prevFramesWritten != mNumFramesWritten); // permit pause to fill buffers
947    //ALOGD("reschedule:%d  empty:%d  mPaused:%d  prevFramesWritten:%u  mNumFramesWritten:%u",
948    //        reschedule, mAudioQueue.empty(), mPaused, prevFramesWritten, mNumFramesWritten);
949    return reschedule;
950}
951
952int64_t NuPlayer::Renderer::getDurationUsIfPlayedAtSampleRate(uint32_t numFrames) {
953    int32_t sampleRate = offloadingAudio() ?
954            mCurrentOffloadInfo.sample_rate : mCurrentPcmInfo.mSampleRate;
955    // TODO: remove the (int32_t) casting below as it may overflow at 12.4 hours.
956    return (int64_t)((int32_t)numFrames * 1000000LL / sampleRate);
957}
958
959// Calculate duration of pending samples if played at normal rate (i.e., 1.0).
960int64_t NuPlayer::Renderer::getPendingAudioPlayoutDurationUs(int64_t nowUs) {
961    int64_t writtenAudioDurationUs = getDurationUsIfPlayedAtSampleRate(mNumFramesWritten);
962    return writtenAudioDurationUs - getPlayedOutAudioDurationUs(nowUs);
963}
964
965int64_t NuPlayer::Renderer::getRealTimeUs(int64_t mediaTimeUs, int64_t nowUs) {
966    int64_t realUs;
967    if (mMediaClock->getRealTimeFor(mediaTimeUs, &realUs) != OK) {
968        // If failed to get current position, e.g. due to audio clock is
969        // not ready, then just play out video immediately without delay.
970        return nowUs;
971    }
972    return realUs;
973}
974
975void NuPlayer::Renderer::onNewAudioMediaTime(int64_t mediaTimeUs) {
976    Mutex::Autolock autoLock(mLock);
977    // TRICKY: vorbis decoder generates multiple frames with the same
978    // timestamp, so only update on the first frame with a given timestamp
979    if (mediaTimeUs == mAnchorTimeMediaUs) {
980        return;
981    }
982    setAudioFirstAnchorTimeIfNeeded_l(mediaTimeUs);
983    int64_t nowUs = ALooper::GetNowUs();
984    int64_t nowMediaUs = mediaTimeUs - getPendingAudioPlayoutDurationUs(nowUs);
985    mMediaClock->updateAnchor(nowMediaUs, nowUs, mediaTimeUs);
986    mAnchorNumFramesWritten = mNumFramesWritten;
987    mAnchorTimeMediaUs = mediaTimeUs;
988}
989
990// Called without mLock acquired.
991void NuPlayer::Renderer::postDrainVideoQueue() {
992    if (mDrainVideoQueuePending
993            || getSyncQueues()
994            || (mPaused && mVideoSampleReceived)) {
995        return;
996    }
997
998    if (mVideoQueue.empty()) {
999        return;
1000    }
1001
1002    QueueEntry &entry = *mVideoQueue.begin();
1003
1004    sp<AMessage> msg = new AMessage(kWhatDrainVideoQueue, this);
1005    msg->setInt32("drainGeneration", getDrainGeneration(false /* audio */));
1006
1007    if (entry.mBuffer == NULL) {
1008        // EOS doesn't carry a timestamp.
1009        msg->post();
1010        mDrainVideoQueuePending = true;
1011        return;
1012    }
1013
1014    int64_t delayUs;
1015    int64_t nowUs = ALooper::GetNowUs();
1016    int64_t realTimeUs;
1017    if (mFlags & FLAG_REAL_TIME) {
1018        int64_t mediaTimeUs;
1019        CHECK(entry.mBuffer->meta()->findInt64("timeUs", &mediaTimeUs));
1020        realTimeUs = mediaTimeUs;
1021    } else {
1022        int64_t mediaTimeUs;
1023        CHECK(entry.mBuffer->meta()->findInt64("timeUs", &mediaTimeUs));
1024
1025        {
1026            Mutex::Autolock autoLock(mLock);
1027            if (mAnchorTimeMediaUs < 0) {
1028                mMediaClock->updateAnchor(mediaTimeUs, nowUs, mediaTimeUs);
1029                mAnchorTimeMediaUs = mediaTimeUs;
1030                realTimeUs = nowUs;
1031            } else {
1032                realTimeUs = getRealTimeUs(mediaTimeUs, nowUs);
1033            }
1034        }
1035        if (!mHasAudio) {
1036            // smooth out videos >= 10fps
1037            mMediaClock->updateMaxTimeMedia(mediaTimeUs + 100000);
1038        }
1039
1040        // Heuristics to handle situation when media time changed without a
1041        // discontinuity. If we have not drained an audio buffer that was
1042        // received after this buffer, repost in 10 msec. Otherwise repost
1043        // in 500 msec.
1044        delayUs = realTimeUs - nowUs;
1045        if (delayUs > 500000) {
1046            int64_t postDelayUs = 500000;
1047            if (mHasAudio && (mLastAudioBufferDrained - entry.mBufferOrdinal) <= 0) {
1048                postDelayUs = 10000;
1049            }
1050            msg->setWhat(kWhatPostDrainVideoQueue);
1051            msg->post(postDelayUs);
1052            mVideoScheduler->restart();
1053            ALOGI("possible video time jump of %dms, retrying in %dms",
1054                    (int)(delayUs / 1000), (int)(postDelayUs / 1000));
1055            mDrainVideoQueuePending = true;
1056            return;
1057        }
1058    }
1059
1060    realTimeUs = mVideoScheduler->schedule(realTimeUs * 1000) / 1000;
1061    int64_t twoVsyncsUs = 2 * (mVideoScheduler->getVsyncPeriod() / 1000);
1062
1063    delayUs = realTimeUs - nowUs;
1064
1065    ALOGW_IF(delayUs > 500000, "unusually high delayUs: %" PRId64, delayUs);
1066    // post 2 display refreshes before rendering is due
1067    msg->post(delayUs > twoVsyncsUs ? delayUs - twoVsyncsUs : 0);
1068
1069    mDrainVideoQueuePending = true;
1070}
1071
1072void NuPlayer::Renderer::onDrainVideoQueue() {
1073    if (mVideoQueue.empty()) {
1074        return;
1075    }
1076
1077    QueueEntry *entry = &*mVideoQueue.begin();
1078
1079    if (entry->mBuffer == NULL) {
1080        // EOS
1081
1082        notifyEOS(false /* audio */, entry->mFinalResult);
1083
1084        mVideoQueue.erase(mVideoQueue.begin());
1085        entry = NULL;
1086
1087        setVideoLateByUs(0);
1088        return;
1089    }
1090
1091    int64_t nowUs = -1;
1092    int64_t realTimeUs;
1093    if (mFlags & FLAG_REAL_TIME) {
1094        CHECK(entry->mBuffer->meta()->findInt64("timeUs", &realTimeUs));
1095    } else {
1096        int64_t mediaTimeUs;
1097        CHECK(entry->mBuffer->meta()->findInt64("timeUs", &mediaTimeUs));
1098
1099        nowUs = ALooper::GetNowUs();
1100        realTimeUs = getRealTimeUs(mediaTimeUs, nowUs);
1101    }
1102
1103    bool tooLate = false;
1104
1105    if (!mPaused) {
1106        if (nowUs == -1) {
1107            nowUs = ALooper::GetNowUs();
1108        }
1109        setVideoLateByUs(nowUs - realTimeUs);
1110        tooLate = (mVideoLateByUs > 40000);
1111
1112        if (tooLate) {
1113            ALOGV("video late by %lld us (%.2f secs)",
1114                 (long long)mVideoLateByUs, mVideoLateByUs / 1E6);
1115        } else {
1116            int64_t mediaUs = 0;
1117            mMediaClock->getMediaTime(realTimeUs, &mediaUs);
1118            ALOGV("rendering video at media time %.2f secs",
1119                    (mFlags & FLAG_REAL_TIME ? realTimeUs :
1120                    mediaUs) / 1E6);
1121        }
1122    } else {
1123        setVideoLateByUs(0);
1124        if (!mVideoSampleReceived && !mHasAudio) {
1125            // This will ensure that the first frame after a flush won't be used as anchor
1126            // when renderer is in paused state, because resume can happen any time after seek.
1127            Mutex::Autolock autoLock(mLock);
1128            clearAnchorTime_l();
1129        }
1130    }
1131
1132    entry->mNotifyConsumed->setInt64("timestampNs", realTimeUs * 1000ll);
1133    entry->mNotifyConsumed->setInt32("render", !tooLate);
1134    entry->mNotifyConsumed->post();
1135    mVideoQueue.erase(mVideoQueue.begin());
1136    entry = NULL;
1137
1138    mVideoSampleReceived = true;
1139
1140    if (!mPaused) {
1141        if (!mVideoRenderingStarted) {
1142            mVideoRenderingStarted = true;
1143            notifyVideoRenderingStart();
1144        }
1145        Mutex::Autolock autoLock(mLock);
1146        notifyIfMediaRenderingStarted_l();
1147    }
1148}
1149
1150void NuPlayer::Renderer::notifyVideoRenderingStart() {
1151    sp<AMessage> notify = mNotify->dup();
1152    notify->setInt32("what", kWhatVideoRenderingStart);
1153    notify->post();
1154}
1155
1156void NuPlayer::Renderer::notifyEOS(bool audio, status_t finalResult, int64_t delayUs) {
1157    sp<AMessage> notify = mNotify->dup();
1158    notify->setInt32("what", kWhatEOS);
1159    notify->setInt32("audio", static_cast<int32_t>(audio));
1160    notify->setInt32("finalResult", finalResult);
1161    notify->post(delayUs);
1162}
1163
1164void NuPlayer::Renderer::notifyAudioTearDown() {
1165    (new AMessage(kWhatAudioTearDown, this))->post();
1166}
1167
1168void NuPlayer::Renderer::onQueueBuffer(const sp<AMessage> &msg) {
1169    int32_t audio;
1170    CHECK(msg->findInt32("audio", &audio));
1171
1172    if (dropBufferIfStale(audio, msg)) {
1173        return;
1174    }
1175
1176    if (audio) {
1177        mHasAudio = true;
1178    } else {
1179        mHasVideo = true;
1180    }
1181
1182    if (mHasVideo) {
1183        if (mVideoScheduler == NULL) {
1184            mVideoScheduler = new VideoFrameScheduler();
1185            mVideoScheduler->init();
1186        }
1187    }
1188
1189    sp<ABuffer> buffer;
1190    CHECK(msg->findBuffer("buffer", &buffer));
1191
1192    sp<AMessage> notifyConsumed;
1193    CHECK(msg->findMessage("notifyConsumed", &notifyConsumed));
1194
1195    QueueEntry entry;
1196    entry.mBuffer = buffer;
1197    entry.mNotifyConsumed = notifyConsumed;
1198    entry.mOffset = 0;
1199    entry.mFinalResult = OK;
1200    entry.mBufferOrdinal = ++mTotalBuffersQueued;
1201
1202    if (audio) {
1203        Mutex::Autolock autoLock(mLock);
1204        mAudioQueue.push_back(entry);
1205        postDrainAudioQueue_l();
1206    } else {
1207        mVideoQueue.push_back(entry);
1208        postDrainVideoQueue();
1209    }
1210
1211    Mutex::Autolock autoLock(mLock);
1212    if (!mSyncQueues || mAudioQueue.empty() || mVideoQueue.empty()) {
1213        return;
1214    }
1215
1216    sp<ABuffer> firstAudioBuffer = (*mAudioQueue.begin()).mBuffer;
1217    sp<ABuffer> firstVideoBuffer = (*mVideoQueue.begin()).mBuffer;
1218
1219    if (firstAudioBuffer == NULL || firstVideoBuffer == NULL) {
1220        // EOS signalled on either queue.
1221        syncQueuesDone_l();
1222        return;
1223    }
1224
1225    int64_t firstAudioTimeUs;
1226    int64_t firstVideoTimeUs;
1227    CHECK(firstAudioBuffer->meta()
1228            ->findInt64("timeUs", &firstAudioTimeUs));
1229    CHECK(firstVideoBuffer->meta()
1230            ->findInt64("timeUs", &firstVideoTimeUs));
1231
1232    int64_t diff = firstVideoTimeUs - firstAudioTimeUs;
1233
1234    ALOGV("queueDiff = %.2f secs", diff / 1E6);
1235
1236    if (diff > 100000ll) {
1237        // Audio data starts More than 0.1 secs before video.
1238        // Drop some audio.
1239
1240        (*mAudioQueue.begin()).mNotifyConsumed->post();
1241        mAudioQueue.erase(mAudioQueue.begin());
1242        return;
1243    }
1244
1245    syncQueuesDone_l();
1246}
1247
1248void NuPlayer::Renderer::syncQueuesDone_l() {
1249    if (!mSyncQueues) {
1250        return;
1251    }
1252
1253    mSyncQueues = false;
1254
1255    if (!mAudioQueue.empty()) {
1256        postDrainAudioQueue_l();
1257    }
1258
1259    if (!mVideoQueue.empty()) {
1260        mLock.unlock();
1261        postDrainVideoQueue();
1262        mLock.lock();
1263    }
1264}
1265
1266void NuPlayer::Renderer::onQueueEOS(const sp<AMessage> &msg) {
1267    int32_t audio;
1268    CHECK(msg->findInt32("audio", &audio));
1269
1270    if (dropBufferIfStale(audio, msg)) {
1271        return;
1272    }
1273
1274    int32_t finalResult;
1275    CHECK(msg->findInt32("finalResult", &finalResult));
1276
1277    QueueEntry entry;
1278    entry.mOffset = 0;
1279    entry.mFinalResult = finalResult;
1280
1281    if (audio) {
1282        Mutex::Autolock autoLock(mLock);
1283        if (mAudioQueue.empty() && mSyncQueues) {
1284            syncQueuesDone_l();
1285        }
1286        mAudioQueue.push_back(entry);
1287        postDrainAudioQueue_l();
1288    } else {
1289        if (mVideoQueue.empty() && getSyncQueues()) {
1290            Mutex::Autolock autoLock(mLock);
1291            syncQueuesDone_l();
1292        }
1293        mVideoQueue.push_back(entry);
1294        postDrainVideoQueue();
1295    }
1296}
1297
1298void NuPlayer::Renderer::onFlush(const sp<AMessage> &msg) {
1299    int32_t audio, notifyComplete;
1300    CHECK(msg->findInt32("audio", &audio));
1301
1302    {
1303        Mutex::Autolock autoLock(mLock);
1304        if (audio) {
1305            notifyComplete = mNotifyCompleteAudio;
1306            mNotifyCompleteAudio = false;
1307        } else {
1308            notifyComplete = mNotifyCompleteVideo;
1309            mNotifyCompleteVideo = false;
1310        }
1311
1312        // If we're currently syncing the queues, i.e. dropping audio while
1313        // aligning the first audio/video buffer times and only one of the
1314        // two queues has data, we may starve that queue by not requesting
1315        // more buffers from the decoder. If the other source then encounters
1316        // a discontinuity that leads to flushing, we'll never find the
1317        // corresponding discontinuity on the other queue.
1318        // Therefore we'll stop syncing the queues if at least one of them
1319        // is flushed.
1320        syncQueuesDone_l();
1321        clearAnchorTime_l();
1322    }
1323
1324    ALOGV("flushing %s", audio ? "audio" : "video");
1325    if (audio) {
1326        {
1327            Mutex::Autolock autoLock(mLock);
1328            flushQueue(&mAudioQueue);
1329
1330            ++mAudioDrainGeneration;
1331            prepareForMediaRenderingStart_l();
1332
1333            // the frame count will be reset after flush.
1334            clearAudioFirstAnchorTime_l();
1335        }
1336
1337        mDrainAudioQueuePending = false;
1338
1339        if (offloadingAudio()) {
1340            mAudioSink->pause();
1341            mAudioSink->flush();
1342            if (!mPaused) {
1343                mAudioSink->start();
1344            }
1345        } else {
1346            mAudioSink->pause();
1347            mAudioSink->flush();
1348            // Call stop() to signal to the AudioSink to completely fill the
1349            // internal buffer before resuming playback.
1350            // FIXME: this is ignored after flush().
1351            mAudioSink->stop();
1352            if (mPaused) {
1353                // Race condition: if renderer is paused and audio sink is stopped,
1354                // we need to make sure that the audio track buffer fully drains
1355                // before delivering data.
1356                // FIXME: remove this if we can detect if stop() is complete.
1357                const int delayUs = 2 * 50 * 1000; // (2 full mixer thread cycles at 50ms)
1358                mPauseDrainAudioAllowedUs = ALooper::GetNowUs() + delayUs;
1359            } else {
1360                mAudioSink->start();
1361            }
1362            mNumFramesWritten = 0;
1363        }
1364    } else {
1365        flushQueue(&mVideoQueue);
1366
1367        mDrainVideoQueuePending = false;
1368
1369        if (mVideoScheduler != NULL) {
1370            mVideoScheduler->restart();
1371        }
1372
1373        Mutex::Autolock autoLock(mLock);
1374        ++mVideoDrainGeneration;
1375        prepareForMediaRenderingStart_l();
1376    }
1377
1378    mVideoSampleReceived = false;
1379
1380    if (notifyComplete) {
1381        notifyFlushComplete(audio);
1382    }
1383}
1384
1385void NuPlayer::Renderer::flushQueue(List<QueueEntry> *queue) {
1386    while (!queue->empty()) {
1387        QueueEntry *entry = &*queue->begin();
1388
1389        if (entry->mBuffer != NULL) {
1390            entry->mNotifyConsumed->post();
1391        }
1392
1393        queue->erase(queue->begin());
1394        entry = NULL;
1395    }
1396}
1397
1398void NuPlayer::Renderer::notifyFlushComplete(bool audio) {
1399    sp<AMessage> notify = mNotify->dup();
1400    notify->setInt32("what", kWhatFlushComplete);
1401    notify->setInt32("audio", static_cast<int32_t>(audio));
1402    notify->post();
1403}
1404
1405bool NuPlayer::Renderer::dropBufferIfStale(
1406        bool audio, const sp<AMessage> &msg) {
1407    int32_t queueGeneration;
1408    CHECK(msg->findInt32("queueGeneration", &queueGeneration));
1409
1410    if (queueGeneration == getQueueGeneration(audio)) {
1411        return false;
1412    }
1413
1414    sp<AMessage> notifyConsumed;
1415    if (msg->findMessage("notifyConsumed", &notifyConsumed)) {
1416        notifyConsumed->post();
1417    }
1418
1419    return true;
1420}
1421
1422void NuPlayer::Renderer::onAudioSinkChanged() {
1423    if (offloadingAudio()) {
1424        return;
1425    }
1426    CHECK(!mDrainAudioQueuePending);
1427    mNumFramesWritten = 0;
1428    {
1429        Mutex::Autolock autoLock(mLock);
1430        mAnchorNumFramesWritten = -1;
1431    }
1432    uint32_t written;
1433    if (mAudioSink->getFramesWritten(&written) == OK) {
1434        mNumFramesWritten = written;
1435    }
1436}
1437
1438void NuPlayer::Renderer::onDisableOffloadAudio() {
1439    Mutex::Autolock autoLock(mLock);
1440    mFlags &= ~FLAG_OFFLOAD_AUDIO;
1441    ++mAudioDrainGeneration;
1442    if (mAudioRenderingStartGeneration != -1) {
1443        prepareForMediaRenderingStart_l();
1444    }
1445}
1446
1447void NuPlayer::Renderer::onEnableOffloadAudio() {
1448    Mutex::Autolock autoLock(mLock);
1449    mFlags |= FLAG_OFFLOAD_AUDIO;
1450    ++mAudioDrainGeneration;
1451    if (mAudioRenderingStartGeneration != -1) {
1452        prepareForMediaRenderingStart_l();
1453    }
1454}
1455
1456void NuPlayer::Renderer::onPause() {
1457    if (mPaused) {
1458        return;
1459    }
1460
1461    {
1462        Mutex::Autolock autoLock(mLock);
1463        // we do not increment audio drain generation so that we fill audio buffer during pause.
1464        ++mVideoDrainGeneration;
1465        prepareForMediaRenderingStart_l();
1466        mPaused = true;
1467        mMediaClock->setPlaybackRate(0.0);
1468    }
1469
1470    mDrainAudioQueuePending = false;
1471    mDrainVideoQueuePending = false;
1472
1473    if (mHasAudio) {
1474        mAudioSink->pause();
1475        startAudioOffloadPauseTimeout();
1476    }
1477
1478    ALOGV("now paused audio queue has %zu entries, video has %zu entries",
1479          mAudioQueue.size(), mVideoQueue.size());
1480}
1481
1482void NuPlayer::Renderer::onResume() {
1483    if (!mPaused) {
1484        return;
1485    }
1486
1487    if (mHasAudio) {
1488        cancelAudioOffloadPauseTimeout();
1489        status_t err = mAudioSink->start();
1490        if (err != OK) {
1491            notifyAudioTearDown();
1492        }
1493    }
1494
1495    {
1496        Mutex::Autolock autoLock(mLock);
1497        mPaused = false;
1498
1499        // configure audiosink as we did not do it when pausing
1500        if (mAudioSink != NULL && mAudioSink->ready()) {
1501            mAudioSink->setPlaybackRate(mPlaybackSettings);
1502        }
1503
1504        mMediaClock->setPlaybackRate(mPlaybackRate);
1505
1506        if (!mAudioQueue.empty()) {
1507            postDrainAudioQueue_l();
1508        }
1509    }
1510
1511    if (!mVideoQueue.empty()) {
1512        postDrainVideoQueue();
1513    }
1514}
1515
1516void NuPlayer::Renderer::onSetVideoFrameRate(float fps) {
1517    if (mVideoScheduler == NULL) {
1518        mVideoScheduler = new VideoFrameScheduler();
1519    }
1520    mVideoScheduler->init(fps);
1521}
1522
1523int32_t NuPlayer::Renderer::getQueueGeneration(bool audio) {
1524    Mutex::Autolock autoLock(mLock);
1525    return (audio ? mAudioQueueGeneration : mVideoQueueGeneration);
1526}
1527
1528int32_t NuPlayer::Renderer::getDrainGeneration(bool audio) {
1529    Mutex::Autolock autoLock(mLock);
1530    return (audio ? mAudioDrainGeneration : mVideoDrainGeneration);
1531}
1532
1533bool NuPlayer::Renderer::getSyncQueues() {
1534    Mutex::Autolock autoLock(mLock);
1535    return mSyncQueues;
1536}
1537
1538// TODO: Remove unnecessary calls to getPlayedOutAudioDurationUs()
1539// as it acquires locks and may query the audio driver.
1540//
1541// Some calls could conceivably retrieve extrapolated data instead of
1542// accessing getTimestamp() or getPosition() every time a data buffer with
1543// a media time is received.
1544//
1545// Calculate duration of played samples if played at normal rate (i.e., 1.0).
1546int64_t NuPlayer::Renderer::getPlayedOutAudioDurationUs(int64_t nowUs) {
1547    uint32_t numFramesPlayed;
1548    int64_t numFramesPlayedAt;
1549    AudioTimestamp ts;
1550    static const int64_t kStaleTimestamp100ms = 100000;
1551
1552    status_t res = mAudioSink->getTimestamp(ts);
1553    if (res == OK) {                 // case 1: mixing audio tracks and offloaded tracks.
1554        numFramesPlayed = ts.mPosition;
1555        numFramesPlayedAt =
1556            ts.mTime.tv_sec * 1000000LL + ts.mTime.tv_nsec / 1000;
1557        const int64_t timestampAge = nowUs - numFramesPlayedAt;
1558        if (timestampAge > kStaleTimestamp100ms) {
1559            // This is an audio FIXME.
1560            // getTimestamp returns a timestamp which may come from audio mixing threads.
1561            // After pausing, the MixerThread may go idle, thus the mTime estimate may
1562            // become stale. Assuming that the MixerThread runs 20ms, with FastMixer at 5ms,
1563            // the max latency should be about 25ms with an average around 12ms (to be verified).
1564            // For safety we use 100ms.
1565            ALOGV("getTimestamp: returned stale timestamp nowUs(%lld) numFramesPlayedAt(%lld)",
1566                    (long long)nowUs, (long long)numFramesPlayedAt);
1567            numFramesPlayedAt = nowUs - kStaleTimestamp100ms;
1568        }
1569        //ALOGD("getTimestamp: OK %d %lld", numFramesPlayed, (long long)numFramesPlayedAt);
1570    } else if (res == WOULD_BLOCK) { // case 2: transitory state on start of a new track
1571        numFramesPlayed = 0;
1572        numFramesPlayedAt = nowUs;
1573        //ALOGD("getTimestamp: WOULD_BLOCK %d %lld",
1574        //        numFramesPlayed, (long long)numFramesPlayedAt);
1575    } else {                         // case 3: transitory at new track or audio fast tracks.
1576        res = mAudioSink->getPosition(&numFramesPlayed);
1577        CHECK_EQ(res, (status_t)OK);
1578        numFramesPlayedAt = nowUs;
1579        numFramesPlayedAt += 1000LL * mAudioSink->latency() / 2; /* XXX */
1580        //ALOGD("getPosition: %u %lld", numFramesPlayed, (long long)numFramesPlayedAt);
1581    }
1582
1583    //CHECK_EQ(numFramesPlayed & (1 << 31), 0);  // can't be negative until 12.4 hrs, test
1584    int64_t durationUs = getDurationUsIfPlayedAtSampleRate(numFramesPlayed)
1585            + nowUs - numFramesPlayedAt;
1586    if (durationUs < 0) {
1587        // Occurs when numFramesPlayed position is very small and the following:
1588        // (1) In case 1, the time nowUs is computed before getTimestamp() is called and
1589        //     numFramesPlayedAt is greater than nowUs by time more than numFramesPlayed.
1590        // (2) In case 3, using getPosition and adding mAudioSink->latency() to
1591        //     numFramesPlayedAt, by a time amount greater than numFramesPlayed.
1592        //
1593        // Both of these are transitory conditions.
1594        ALOGV("getPlayedOutAudioDurationUs: negative duration %lld set to zero", (long long)durationUs);
1595        durationUs = 0;
1596    }
1597    ALOGV("getPlayedOutAudioDurationUs(%lld) nowUs(%lld) frames(%u) framesAt(%lld)",
1598            (long long)durationUs, (long long)nowUs, numFramesPlayed, (long long)numFramesPlayedAt);
1599    return durationUs;
1600}
1601
1602void NuPlayer::Renderer::onAudioTearDown(AudioTearDownReason reason) {
1603    if (mAudioTornDown) {
1604        return;
1605    }
1606    mAudioTornDown = true;
1607
1608    int64_t currentPositionUs;
1609    sp<AMessage> notify = mNotify->dup();
1610    if (getCurrentPosition(&currentPositionUs) == OK) {
1611        notify->setInt64("positionUs", currentPositionUs);
1612    }
1613
1614    mAudioSink->stop();
1615    mAudioSink->flush();
1616
1617    notify->setInt32("what", kWhatAudioTearDown);
1618    notify->setInt32("reason", reason);
1619    notify->post();
1620}
1621
1622void NuPlayer::Renderer::startAudioOffloadPauseTimeout() {
1623    if (offloadingAudio()) {
1624        mWakeLock->acquire();
1625        sp<AMessage> msg = new AMessage(kWhatAudioOffloadPauseTimeout, this);
1626        msg->setInt32("drainGeneration", mAudioOffloadPauseTimeoutGeneration);
1627        msg->post(kOffloadPauseMaxUs);
1628    }
1629}
1630
1631void NuPlayer::Renderer::cancelAudioOffloadPauseTimeout() {
1632    if (offloadingAudio()) {
1633        mWakeLock->release(true);
1634        ++mAudioOffloadPauseTimeoutGeneration;
1635    }
1636}
1637
1638status_t NuPlayer::Renderer::onOpenAudioSink(
1639        const sp<AMessage> &format,
1640        bool offloadOnly,
1641        bool hasVideo,
1642        uint32_t flags) {
1643    ALOGV("openAudioSink: offloadOnly(%d) offloadingAudio(%d)",
1644            offloadOnly, offloadingAudio());
1645    bool audioSinkChanged = false;
1646
1647    int32_t numChannels;
1648    CHECK(format->findInt32("channel-count", &numChannels));
1649
1650    int32_t channelMask;
1651    if (!format->findInt32("channel-mask", &channelMask)) {
1652        // signal to the AudioSink to derive the mask from count.
1653        channelMask = CHANNEL_MASK_USE_CHANNEL_ORDER;
1654    }
1655
1656    int32_t sampleRate;
1657    CHECK(format->findInt32("sample-rate", &sampleRate));
1658
1659    if (offloadingAudio()) {
1660        audio_format_t audioFormat = AUDIO_FORMAT_PCM_16_BIT;
1661        AString mime;
1662        CHECK(format->findString("mime", &mime));
1663        status_t err = mapMimeToAudioFormat(audioFormat, mime.c_str());
1664
1665        if (err != OK) {
1666            ALOGE("Couldn't map mime \"%s\" to a valid "
1667                    "audio_format", mime.c_str());
1668            onDisableOffloadAudio();
1669        } else {
1670            ALOGV("Mime \"%s\" mapped to audio_format 0x%x",
1671                    mime.c_str(), audioFormat);
1672
1673            int avgBitRate = -1;
1674            format->findInt32("bit-rate", &avgBitRate);
1675
1676            int32_t aacProfile = -1;
1677            if (audioFormat == AUDIO_FORMAT_AAC
1678                    && format->findInt32("aac-profile", &aacProfile)) {
1679                // Redefine AAC format as per aac profile
1680                mapAACProfileToAudioFormat(
1681                        audioFormat,
1682                        aacProfile);
1683            }
1684
1685            audio_offload_info_t offloadInfo = AUDIO_INFO_INITIALIZER;
1686            offloadInfo.duration_us = -1;
1687            format->findInt64(
1688                    "durationUs", &offloadInfo.duration_us);
1689            offloadInfo.sample_rate = sampleRate;
1690            offloadInfo.channel_mask = channelMask;
1691            offloadInfo.format = audioFormat;
1692            offloadInfo.stream_type = AUDIO_STREAM_MUSIC;
1693            offloadInfo.bit_rate = avgBitRate;
1694            offloadInfo.has_video = hasVideo;
1695            offloadInfo.is_streaming = true;
1696
1697            if (memcmp(&mCurrentOffloadInfo, &offloadInfo, sizeof(offloadInfo)) == 0) {
1698                ALOGV("openAudioSink: no change in offload mode");
1699                // no change from previous configuration, everything ok.
1700                return OK;
1701            }
1702            mCurrentPcmInfo = AUDIO_PCMINFO_INITIALIZER;
1703
1704            ALOGV("openAudioSink: try to open AudioSink in offload mode");
1705            uint32_t offloadFlags = flags;
1706            offloadFlags |= AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD;
1707            offloadFlags &= ~AUDIO_OUTPUT_FLAG_DEEP_BUFFER;
1708            audioSinkChanged = true;
1709            mAudioSink->close();
1710
1711            err = mAudioSink->open(
1712                    sampleRate,
1713                    numChannels,
1714                    (audio_channel_mask_t)channelMask,
1715                    audioFormat,
1716                    0 /* bufferCount - unused */,
1717                    &NuPlayer::Renderer::AudioSinkCallback,
1718                    this,
1719                    (audio_output_flags_t)offloadFlags,
1720                    &offloadInfo);
1721
1722            if (err == OK) {
1723                err = mAudioSink->setPlaybackRate(mPlaybackSettings);
1724            }
1725
1726            if (err == OK) {
1727                // If the playback is offloaded to h/w, we pass
1728                // the HAL some metadata information.
1729                // We don't want to do this for PCM because it
1730                // will be going through the AudioFlinger mixer
1731                // before reaching the hardware.
1732                // TODO
1733                mCurrentOffloadInfo = offloadInfo;
1734                if (!mPaused) { // for preview mode, don't start if paused
1735                    err = mAudioSink->start();
1736                }
1737                ALOGV_IF(err == OK, "openAudioSink: offload succeeded");
1738            }
1739            if (err != OK) {
1740                // Clean up, fall back to non offload mode.
1741                mAudioSink->close();
1742                onDisableOffloadAudio();
1743                mCurrentOffloadInfo = AUDIO_INFO_INITIALIZER;
1744                ALOGV("openAudioSink: offload failed");
1745            } else {
1746                mUseAudioCallback = true;  // offload mode transfers data through callback
1747                ++mAudioDrainGeneration;  // discard pending kWhatDrainAudioQueue message.
1748            }
1749        }
1750    }
1751    if (!offloadOnly && !offloadingAudio()) {
1752        ALOGV("openAudioSink: open AudioSink in NON-offload mode");
1753        uint32_t pcmFlags = flags;
1754        pcmFlags &= ~AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD;
1755
1756        const PcmInfo info = {
1757                (audio_channel_mask_t)channelMask,
1758                (audio_output_flags_t)pcmFlags,
1759                AUDIO_FORMAT_PCM_16_BIT, // TODO: change to audioFormat
1760                numChannels,
1761                sampleRate
1762        };
1763        if (memcmp(&mCurrentPcmInfo, &info, sizeof(info)) == 0) {
1764            ALOGV("openAudioSink: no change in pcm mode");
1765            // no change from previous configuration, everything ok.
1766            return OK;
1767        }
1768
1769        audioSinkChanged = true;
1770        mAudioSink->close();
1771        mCurrentOffloadInfo = AUDIO_INFO_INITIALIZER;
1772        // Note: It is possible to set up the callback, but not use it to send audio data.
1773        // This requires a fix in AudioSink to explicitly specify the transfer mode.
1774        mUseAudioCallback = getUseAudioCallbackSetting();
1775        if (mUseAudioCallback) {
1776            ++mAudioDrainGeneration;  // discard pending kWhatDrainAudioQueue message.
1777        }
1778
1779        // Compute the desired buffer size.
1780        // For callback mode, the amount of time before wakeup is about half the buffer size.
1781        const uint32_t frameCount =
1782                (unsigned long long)sampleRate * getAudioSinkPcmMsSetting() / 1000;
1783
1784        status_t err = mAudioSink->open(
1785                    sampleRate,
1786                    numChannels,
1787                    (audio_channel_mask_t)channelMask,
1788                    AUDIO_FORMAT_PCM_16_BIT,
1789                    0 /* bufferCount - unused */,
1790                    mUseAudioCallback ? &NuPlayer::Renderer::AudioSinkCallback : NULL,
1791                    mUseAudioCallback ? this : NULL,
1792                    (audio_output_flags_t)pcmFlags,
1793                    NULL,
1794                    true /* doNotReconnect */,
1795                    frameCount);
1796        if (err == OK) {
1797            err = mAudioSink->setPlaybackRate(mPlaybackSettings);
1798        }
1799        if (err != OK) {
1800            ALOGW("openAudioSink: non offloaded open failed status: %d", err);
1801            mCurrentPcmInfo = AUDIO_PCMINFO_INITIALIZER;
1802            return err;
1803        }
1804        mCurrentPcmInfo = info;
1805        if (!mPaused) { // for preview mode, don't start if paused
1806            mAudioSink->start();
1807        }
1808    }
1809    if (audioSinkChanged) {
1810        onAudioSinkChanged();
1811    }
1812    mAudioTornDown = false;
1813    return OK;
1814}
1815
1816void NuPlayer::Renderer::onCloseAudioSink() {
1817    mAudioSink->close();
1818    mCurrentOffloadInfo = AUDIO_INFO_INITIALIZER;
1819    mCurrentPcmInfo = AUDIO_PCMINFO_INITIALIZER;
1820}
1821
1822}  // namespace android
1823
1824