NuPlayerRenderer.cpp revision 202bce11a7f66f27e6dbb6d154ddc123aa62513d 
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
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/MediaErrors.h>
28#include <media/stagefright/MetaData.h>
29#include <media/stagefright/Utils.h>
30
31#include <VideoFrameScheduler.h>
32
33#include <inttypes.h>
34
35namespace android {
36
37// Maximum time in paused state when offloading audio decompression. When elapsed, the AudioSink
38// is closed to allow the audio DSP to power down.
39static const int64_t kOffloadPauseMaxUs = 10000000ll;
40
41// static
42const int64_t NuPlayer::Renderer::kMinPositionUpdateDelayUs = 100000ll;
43
44NuPlayer::Renderer::Renderer(
45        const sp<MediaPlayerBase::AudioSink> &sink,
46        const sp<AMessage> &notify,
47        uint32_t flags)
48    : mAudioSink(sink),
49      mNotify(notify),
50      mFlags(flags),
51      mNumFramesWritten(0),
52      mDrainAudioQueuePending(false),
53      mDrainVideoQueuePending(false),
54      mAudioQueueGeneration(0),
55      mVideoQueueGeneration(0),
56      mAudioFirstAnchorTimeMediaUs(-1),
57      mAnchorTimeMediaUs(-1),
58      mAnchorTimeRealUs(-1),
59      mAnchorNumFramesWritten(-1),
60      mAnchorMaxMediaUs(-1),
61      mVideoLateByUs(0ll),
62      mHasAudio(false),
63      mHasVideo(false),
64      mPauseStartedTimeRealUs(-1),
65      mFlushingAudio(false),
66      mFlushingVideo(false),
67      mNotifyCompleteAudio(false),
68      mNotifyCompleteVideo(false),
69      mSyncQueues(false),
70      mPaused(false),
71      mVideoSampleReceived(false),
72      mVideoRenderingStarted(false),
73      mVideoRenderingStartGeneration(0),
74      mAudioRenderingStartGeneration(0),
75      mAudioOffloadPauseTimeoutGeneration(0),
76      mAudioOffloadTornDown(false),
77      mCurrentOffloadInfo(AUDIO_INFO_INITIALIZER),
78      mTotalBuffersQueued(0),
79      mLastAudioBufferDrained(0) {
80}
81
82NuPlayer::Renderer::~Renderer() {
83    if (offloadingAudio()) {
84        mAudioSink->stop();
85        mAudioSink->flush();
86        mAudioSink->close();
87    }
88}
89
90void NuPlayer::Renderer::queueBuffer(
91        bool audio,
92        const sp<ABuffer> &buffer,
93        const sp<AMessage> &notifyConsumed) {
94    sp<AMessage> msg = new AMessage(kWhatQueueBuffer, id());
95    msg->setInt32("audio", static_cast<int32_t>(audio));
96    msg->setBuffer("buffer", buffer);
97    msg->setMessage("notifyConsumed", notifyConsumed);
98    msg->post();
99}
100
101void NuPlayer::Renderer::queueEOS(bool audio, status_t finalResult) {
102    CHECK_NE(finalResult, (status_t)OK);
103
104    sp<AMessage> msg = new AMessage(kWhatQueueEOS, id());
105    msg->setInt32("audio", static_cast<int32_t>(audio));
106    msg->setInt32("finalResult", finalResult);
107    msg->post();
108}
109
110void NuPlayer::Renderer::flush(bool audio, bool notifyComplete) {
111    {
112        Mutex::Autolock autoLock(mFlushLock);
113        if (audio) {
114            mNotifyCompleteAudio |= notifyComplete;
115            if (mFlushingAudio) {
116                return;
117            }
118            mFlushingAudio = true;
119        } else {
120            mNotifyCompleteVideo |= notifyComplete;
121            if (mFlushingVideo) {
122                return;
123            }
124            mFlushingVideo = true;
125        }
126    }
127
128    sp<AMessage> msg = new AMessage(kWhatFlush, id());
129    msg->setInt32("audio", static_cast<int32_t>(audio));
130    msg->post();
131}
132
133void NuPlayer::Renderer::signalTimeDiscontinuity() {
134    Mutex::Autolock autoLock(mLock);
135    // CHECK(mAudioQueue.empty());
136    // CHECK(mVideoQueue.empty());
137    setAudioFirstAnchorTime(-1);
138    setAnchorTime(-1, -1);
139    setVideoLateByUs(0);
140    mSyncQueues = false;
141}
142
143void NuPlayer::Renderer::signalAudioSinkChanged() {
144    (new AMessage(kWhatAudioSinkChanged, id()))->post();
145}
146
147void NuPlayer::Renderer::signalDisableOffloadAudio() {
148    (new AMessage(kWhatDisableOffloadAudio, id()))->post();
149}
150
151void NuPlayer::Renderer::signalEnableOffloadAudio() {
152    (new AMessage(kWhatEnableOffloadAudio, id()))->post();
153}
154
155void NuPlayer::Renderer::pause() {
156    (new AMessage(kWhatPause, id()))->post();
157}
158
159void NuPlayer::Renderer::resume() {
160    (new AMessage(kWhatResume, id()))->post();
161}
162
163void NuPlayer::Renderer::setVideoFrameRate(float fps) {
164    sp<AMessage> msg = new AMessage(kWhatSetVideoFrameRate, id());
165    msg->setFloat("frame-rate", fps);
166    msg->post();
167}
168
169status_t NuPlayer::Renderer::getCurrentPosition(int64_t *mediaUs) {
170    return getCurrentPosition(mediaUs, ALooper::GetNowUs());
171}
172
173status_t NuPlayer::Renderer::getCurrentPosition(
174        int64_t *mediaUs, int64_t nowUs, bool allowPastQueuedVideo) {
175    Mutex::Autolock autoLock(mTimeLock);
176    if (!mHasAudio && !mHasVideo) {
177        return NO_INIT;
178    }
179
180    if (mAnchorTimeMediaUs < 0) {
181        return NO_INIT;
182    }
183
184    int64_t positionUs = (nowUs - mAnchorTimeRealUs) + mAnchorTimeMediaUs;
185
186    if (mPauseStartedTimeRealUs != -1) {
187        positionUs -= (nowUs - mPauseStartedTimeRealUs);
188    }
189
190    // limit position to the last queued media time (for video only stream
191    // position will be discrete as we don't know how long each frame lasts)
192    if (mAnchorMaxMediaUs >= 0 && !allowPastQueuedVideo) {
193        if (positionUs > mAnchorMaxMediaUs) {
194            positionUs = mAnchorMaxMediaUs;
195        }
196    }
197
198    if (positionUs < mAudioFirstAnchorTimeMediaUs) {
199        positionUs = mAudioFirstAnchorTimeMediaUs;
200    }
201
202    *mediaUs = (positionUs <= 0) ? 0 : positionUs;
203    return OK;
204}
205
206void NuPlayer::Renderer::setHasMedia(bool audio) {
207    Mutex::Autolock autoLock(mTimeLock);
208    if (audio) {
209        mHasAudio = true;
210    } else {
211        mHasVideo = true;
212    }
213}
214
215void NuPlayer::Renderer::setAudioFirstAnchorTime(int64_t mediaUs) {
216    Mutex::Autolock autoLock(mTimeLock);
217    mAudioFirstAnchorTimeMediaUs = mediaUs;
218}
219
220void NuPlayer::Renderer::setAudioFirstAnchorTimeIfNeeded(int64_t mediaUs) {
221    Mutex::Autolock autoLock(mTimeLock);
222    if (mAudioFirstAnchorTimeMediaUs == -1) {
223        mAudioFirstAnchorTimeMediaUs = mediaUs;
224    }
225}
226
227void NuPlayer::Renderer::setAnchorTime(
228        int64_t mediaUs, int64_t realUs, int64_t numFramesWritten, bool resume) {
229    Mutex::Autolock autoLock(mTimeLock);
230    mAnchorTimeMediaUs = mediaUs;
231    mAnchorTimeRealUs = realUs;
232    mAnchorNumFramesWritten = numFramesWritten;
233    if (resume) {
234        mPauseStartedTimeRealUs = -1;
235    }
236}
237
238void NuPlayer::Renderer::setVideoLateByUs(int64_t lateUs) {
239    Mutex::Autolock autoLock(mTimeLock);
240    mVideoLateByUs = lateUs;
241}
242
243int64_t NuPlayer::Renderer::getVideoLateByUs() {
244    Mutex::Autolock autoLock(mTimeLock);
245    return mVideoLateByUs;
246}
247
248void NuPlayer::Renderer::setPauseStartedTimeRealUs(int64_t realUs) {
249    Mutex::Autolock autoLock(mTimeLock);
250    mPauseStartedTimeRealUs = realUs;
251}
252
253status_t NuPlayer::Renderer::openAudioSink(
254        const sp<AMessage> &format,
255        bool offloadOnly,
256        bool hasVideo,
257        uint32_t flags,
258        bool *isOffloaded) {
259    sp<AMessage> msg = new AMessage(kWhatOpenAudioSink, id());
260    msg->setMessage("format", format);
261    msg->setInt32("offload-only", offloadOnly);
262    msg->setInt32("has-video", hasVideo);
263    msg->setInt32("flags", flags);
264
265    sp<AMessage> response;
266    msg->postAndAwaitResponse(&response);
267
268    int32_t err;
269    if (!response->findInt32("err", &err)) {
270        err = INVALID_OPERATION;
271    } else if (err == OK && isOffloaded != NULL) {
272        int32_t offload;
273        CHECK(response->findInt32("offload", &offload));
274        *isOffloaded = (offload != 0);
275    }
276    return err;
277}
278
279void NuPlayer::Renderer::closeAudioSink() {
280    sp<AMessage> msg = new AMessage(kWhatCloseAudioSink, id());
281
282    sp<AMessage> response;
283    msg->postAndAwaitResponse(&response);
284}
285
286void NuPlayer::Renderer::onMessageReceived(const sp<AMessage> &msg) {
287    switch (msg->what()) {
288        case kWhatOpenAudioSink:
289        {
290            sp<AMessage> format;
291            CHECK(msg->findMessage("format", &format));
292
293            int32_t offloadOnly;
294            CHECK(msg->findInt32("offload-only", &offloadOnly));
295
296            int32_t hasVideo;
297            CHECK(msg->findInt32("has-video", &hasVideo));
298
299            uint32_t flags;
300            CHECK(msg->findInt32("flags", (int32_t *)&flags));
301
302            status_t err = onOpenAudioSink(format, offloadOnly, hasVideo, flags);
303
304            sp<AMessage> response = new AMessage;
305            response->setInt32("err", err);
306            response->setInt32("offload", offloadingAudio());
307
308            uint32_t replyID;
309            CHECK(msg->senderAwaitsResponse(&replyID));
310            response->postReply(replyID);
311
312            break;
313        }
314
315        case kWhatCloseAudioSink:
316        {
317            uint32_t replyID;
318            CHECK(msg->senderAwaitsResponse(&replyID));
319
320            onCloseAudioSink();
321
322            sp<AMessage> response = new AMessage;
323            response->postReply(replyID);
324            break;
325        }
326
327        case kWhatStopAudioSink:
328        {
329            mAudioSink->stop();
330            break;
331        }
332
333        case kWhatDrainAudioQueue:
334        {
335            int32_t generation;
336            CHECK(msg->findInt32("generation", &generation));
337            if (generation != mAudioQueueGeneration) {
338                break;
339            }
340
341            mDrainAudioQueuePending = false;
342
343            if (onDrainAudioQueue()) {
344                uint32_t numFramesPlayed;
345                CHECK_EQ(mAudioSink->getPosition(&numFramesPlayed),
346                         (status_t)OK);
347
348                uint32_t numFramesPendingPlayout =
349                    mNumFramesWritten - numFramesPlayed;
350
351                // This is how long the audio sink will have data to
352                // play back.
353                int64_t delayUs =
354                    mAudioSink->msecsPerFrame()
355                        * numFramesPendingPlayout * 1000ll;
356
357                // Let's give it more data after about half that time
358                // has elapsed.
359                // kWhatDrainAudioQueue is used for non-offloading mode,
360                // and mLock is used only for offloading mode. Therefore,
361                // no need to acquire mLock here.
362                postDrainAudioQueue_l(delayUs / 2);
363            }
364            break;
365        }
366
367        case kWhatDrainVideoQueue:
368        {
369            int32_t generation;
370            CHECK(msg->findInt32("generation", &generation));
371            if (generation != mVideoQueueGeneration) {
372                break;
373            }
374
375            mDrainVideoQueuePending = false;
376
377            onDrainVideoQueue();
378
379            postDrainVideoQueue();
380            break;
381        }
382
383        case kWhatPostDrainVideoQueue:
384        {
385            int32_t generation;
386            CHECK(msg->findInt32("generation", &generation));
387            if (generation != mVideoQueueGeneration) {
388                break;
389            }
390
391            mDrainVideoQueuePending = false;
392            postDrainVideoQueue();
393            break;
394        }
395
396        case kWhatQueueBuffer:
397        {
398            onQueueBuffer(msg);
399            break;
400        }
401
402        case kWhatQueueEOS:
403        {
404            onQueueEOS(msg);
405            break;
406        }
407
408        case kWhatFlush:
409        {
410            onFlush(msg);
411            break;
412        }
413
414        case kWhatAudioSinkChanged:
415        {
416            onAudioSinkChanged();
417            break;
418        }
419
420        case kWhatDisableOffloadAudio:
421        {
422            onDisableOffloadAudio();
423            break;
424        }
425
426        case kWhatEnableOffloadAudio:
427        {
428            onEnableOffloadAudio();
429            break;
430        }
431
432        case kWhatPause:
433        {
434            onPause();
435            break;
436        }
437
438        case kWhatResume:
439        {
440            onResume();
441            break;
442        }
443
444        case kWhatSetVideoFrameRate:
445        {
446            float fps;
447            CHECK(msg->findFloat("frame-rate", &fps));
448            onSetVideoFrameRate(fps);
449            break;
450        }
451
452        case kWhatAudioOffloadTearDown:
453        {
454            onAudioOffloadTearDown(kDueToError);
455            break;
456        }
457
458        case kWhatAudioOffloadPauseTimeout:
459        {
460            int32_t generation;
461            CHECK(msg->findInt32("generation", &generation));
462            if (generation != mAudioOffloadPauseTimeoutGeneration) {
463                break;
464            }
465            ALOGV("Audio Offload tear down due to pause timeout.");
466            onAudioOffloadTearDown(kDueToTimeout);
467            break;
468        }
469
470        default:
471            TRESPASS();
472            break;
473    }
474}
475
476void NuPlayer::Renderer::postDrainAudioQueue_l(int64_t delayUs) {
477    if (mDrainAudioQueuePending || mSyncQueues || mPaused
478            || offloadingAudio()) {
479        return;
480    }
481
482    if (mAudioQueue.empty()) {
483        return;
484    }
485
486    mDrainAudioQueuePending = true;
487    sp<AMessage> msg = new AMessage(kWhatDrainAudioQueue, id());
488    msg->setInt32("generation", mAudioQueueGeneration);
489    msg->post(delayUs);
490}
491
492void NuPlayer::Renderer::prepareForMediaRenderingStart() {
493    mAudioRenderingStartGeneration = mAudioQueueGeneration;
494    mVideoRenderingStartGeneration = mVideoQueueGeneration;
495}
496
497void NuPlayer::Renderer::notifyIfMediaRenderingStarted() {
498    if (mVideoRenderingStartGeneration == mVideoQueueGeneration &&
499        mAudioRenderingStartGeneration == mAudioQueueGeneration) {
500        mVideoRenderingStartGeneration = -1;
501        mAudioRenderingStartGeneration = -1;
502
503        sp<AMessage> notify = mNotify->dup();
504        notify->setInt32("what", kWhatMediaRenderingStart);
505        notify->post();
506    }
507}
508
509// static
510size_t NuPlayer::Renderer::AudioSinkCallback(
511        MediaPlayerBase::AudioSink * /* audioSink */,
512        void *buffer,
513        size_t size,
514        void *cookie,
515        MediaPlayerBase::AudioSink::cb_event_t event) {
516    NuPlayer::Renderer *me = (NuPlayer::Renderer *)cookie;
517
518    switch (event) {
519        case MediaPlayerBase::AudioSink::CB_EVENT_FILL_BUFFER:
520        {
521            return me->fillAudioBuffer(buffer, size);
522            break;
523        }
524
525        case MediaPlayerBase::AudioSink::CB_EVENT_STREAM_END:
526        {
527            me->notifyEOS(true /* audio */, ERROR_END_OF_STREAM);
528            break;
529        }
530
531        case MediaPlayerBase::AudioSink::CB_EVENT_TEAR_DOWN:
532        {
533            me->notifyAudioOffloadTearDown();
534            break;
535        }
536    }
537
538    return 0;
539}
540
541size_t NuPlayer::Renderer::fillAudioBuffer(void *buffer, size_t size) {
542    Mutex::Autolock autoLock(mLock);
543
544    if (!offloadingAudio() || mPaused) {
545        return 0;
546    }
547
548    bool hasEOS = false;
549
550    size_t sizeCopied = 0;
551    bool firstEntry = true;
552    while (sizeCopied < size && !mAudioQueue.empty()) {
553        QueueEntry *entry = &*mAudioQueue.begin();
554
555        if (entry->mBuffer == NULL) { // EOS
556            hasEOS = true;
557            mAudioQueue.erase(mAudioQueue.begin());
558            entry = NULL;
559            break;
560        }
561
562        if (firstEntry && entry->mOffset == 0) {
563            firstEntry = false;
564            int64_t mediaTimeUs;
565            CHECK(entry->mBuffer->meta()->findInt64("timeUs", &mediaTimeUs));
566            ALOGV("rendering audio at media time %.2f secs", mediaTimeUs / 1E6);
567            setAudioFirstAnchorTimeIfNeeded(mediaTimeUs);
568        }
569
570        size_t copy = entry->mBuffer->size() - entry->mOffset;
571        size_t sizeRemaining = size - sizeCopied;
572        if (copy > sizeRemaining) {
573            copy = sizeRemaining;
574        }
575
576        memcpy((char *)buffer + sizeCopied,
577               entry->mBuffer->data() + entry->mOffset,
578               copy);
579
580        entry->mOffset += copy;
581        if (entry->mOffset == entry->mBuffer->size()) {
582            entry->mNotifyConsumed->post();
583            mAudioQueue.erase(mAudioQueue.begin());
584            entry = NULL;
585        }
586        sizeCopied += copy;
587        notifyIfMediaRenderingStarted();
588    }
589
590    if (mAudioFirstAnchorTimeMediaUs >= 0) {
591        int64_t nowUs = ALooper::GetNowUs();
592        setAnchorTime(mAudioFirstAnchorTimeMediaUs, nowUs - getPlayedOutAudioDurationUs(nowUs));
593    }
594
595    // we don't know how much data we are queueing for offloaded tracks
596    mAnchorMaxMediaUs = -1;
597
598    if (hasEOS) {
599        (new AMessage(kWhatStopAudioSink, id()))->post();
600    }
601
602    return sizeCopied;
603}
604
605bool NuPlayer::Renderer::onDrainAudioQueue() {
606    uint32_t numFramesPlayed;
607    if (mAudioSink->getPosition(&numFramesPlayed) != OK) {
608        return false;
609    }
610
611    ssize_t numFramesAvailableToWrite =
612        mAudioSink->frameCount() - (mNumFramesWritten - numFramesPlayed);
613
614#if 0
615    if (numFramesAvailableToWrite == mAudioSink->frameCount()) {
616        ALOGI("audio sink underrun");
617    } else {
618        ALOGV("audio queue has %d frames left to play",
619             mAudioSink->frameCount() - numFramesAvailableToWrite);
620    }
621#endif
622
623    size_t numBytesAvailableToWrite =
624        numFramesAvailableToWrite * mAudioSink->frameSize();
625
626    while (numBytesAvailableToWrite > 0 && !mAudioQueue.empty()) {
627        QueueEntry *entry = &*mAudioQueue.begin();
628
629        mLastAudioBufferDrained = entry->mBufferOrdinal;
630
631        if (entry->mBuffer == NULL) {
632            // EOS
633            int64_t postEOSDelayUs = 0;
634            if (mAudioSink->needsTrailingPadding()) {
635                postEOSDelayUs = getPendingAudioPlayoutDurationUs(ALooper::GetNowUs());
636            }
637            notifyEOS(true /* audio */, entry->mFinalResult, postEOSDelayUs);
638
639            mAudioQueue.erase(mAudioQueue.begin());
640            entry = NULL;
641            // Need to stop the track here, because that will play out the last
642            // little bit at the end of the file. Otherwise short files won't play.
643            mAudioSink->stop();
644            mNumFramesWritten = 0;
645            return false;
646        }
647
648        if (entry->mOffset == 0) {
649            int64_t mediaTimeUs;
650            CHECK(entry->mBuffer->meta()->findInt64("timeUs", &mediaTimeUs));
651            ALOGV("rendering audio at media time %.2f secs", mediaTimeUs / 1E6);
652            onNewAudioMediaTime(mediaTimeUs);
653        }
654
655        size_t copy = entry->mBuffer->size() - entry->mOffset;
656        if (copy > numBytesAvailableToWrite) {
657            copy = numBytesAvailableToWrite;
658        }
659
660        ssize_t written = mAudioSink->write(entry->mBuffer->data() + entry->mOffset, copy);
661        if (written < 0) {
662            // An error in AudioSink write. Perhaps the AudioSink was not properly opened.
663            ALOGE("AudioSink write error(%zd) when writing %zu bytes", written, copy);
664            break;
665        }
666
667        entry->mOffset += written;
668        if (entry->mOffset == entry->mBuffer->size()) {
669            entry->mNotifyConsumed->post();
670            mAudioQueue.erase(mAudioQueue.begin());
671
672            entry = NULL;
673        }
674
675        numBytesAvailableToWrite -= written;
676        size_t copiedFrames = written / mAudioSink->frameSize();
677        mNumFramesWritten += copiedFrames;
678
679        notifyIfMediaRenderingStarted();
680
681        if (written != (ssize_t)copy) {
682            // A short count was received from AudioSink::write()
683            //
684            // AudioSink write should block until exactly the number of bytes are delivered.
685            // But it may return with a short count (without an error) when:
686            //
687            // 1) Size to be copied is not a multiple of the frame size. We consider this fatal.
688            // 2) AudioSink is an AudioCache for data retrieval, and the AudioCache is exceeded.
689
690            // (Case 1)
691            // Must be a multiple of the frame size.  If it is not a multiple of a frame size, it
692            // needs to fail, as we should not carry over fractional frames between calls.
693            CHECK_EQ(copy % mAudioSink->frameSize(), 0);
694
695            // (Case 2)
696            // Return early to the caller.
697            // Beware of calling immediately again as this may busy-loop if you are not careful.
698            ALOGW("AudioSink write short frame count %zd < %zu", written, copy);
699            break;
700        }
701    }
702    mAnchorMaxMediaUs =
703        mAnchorTimeMediaUs +
704                (int64_t)(max((long long)mNumFramesWritten - mAnchorNumFramesWritten, 0LL)
705                        * 1000LL * mAudioSink->msecsPerFrame());
706
707    return !mAudioQueue.empty();
708}
709
710int64_t NuPlayer::Renderer::getPendingAudioPlayoutDurationUs(int64_t nowUs) {
711    int64_t writtenAudioDurationUs =
712        mNumFramesWritten * 1000LL * mAudioSink->msecsPerFrame();
713    return writtenAudioDurationUs - getPlayedOutAudioDurationUs(nowUs);
714}
715
716int64_t NuPlayer::Renderer::getRealTimeUs(int64_t mediaTimeUs, int64_t nowUs) {
717    int64_t currentPositionUs;
718    if (getCurrentPosition(&currentPositionUs, nowUs, true /* allowPastQueuedVideo */) != OK) {
719        // If failed to get current position, e.g. due to audio clock is not ready, then just
720        // play out video immediately without delay.
721        return nowUs;
722    }
723    return (mediaTimeUs - currentPositionUs) + nowUs;
724}
725
726void NuPlayer::Renderer::onNewAudioMediaTime(int64_t mediaTimeUs) {
727    // TRICKY: vorbis decoder generates multiple frames with the same
728    // timestamp, so only update on the first frame with a given timestamp
729    if (mediaTimeUs == mAnchorTimeMediaUs) {
730        return;
731    }
732    setAudioFirstAnchorTimeIfNeeded(mediaTimeUs);
733    int64_t nowUs = ALooper::GetNowUs();
734    setAnchorTime(
735            mediaTimeUs, nowUs + getPendingAudioPlayoutDurationUs(nowUs), mNumFramesWritten);
736}
737
738void NuPlayer::Renderer::postDrainVideoQueue() {
739    if (mDrainVideoQueuePending
740            || mSyncQueues
741            || (mPaused && mVideoSampleReceived)) {
742        return;
743    }
744
745    if (mVideoQueue.empty()) {
746        return;
747    }
748
749    QueueEntry &entry = *mVideoQueue.begin();
750
751    sp<AMessage> msg = new AMessage(kWhatDrainVideoQueue, id());
752    msg->setInt32("generation", mVideoQueueGeneration);
753
754    if (entry.mBuffer == NULL) {
755        // EOS doesn't carry a timestamp.
756        msg->post();
757        mDrainVideoQueuePending = true;
758        return;
759    }
760
761    int64_t delayUs;
762    int64_t nowUs = ALooper::GetNowUs();
763    int64_t realTimeUs;
764    if (mFlags & FLAG_REAL_TIME) {
765        int64_t mediaTimeUs;
766        CHECK(entry.mBuffer->meta()->findInt64("timeUs", &mediaTimeUs));
767        realTimeUs = mediaTimeUs;
768    } else {
769        int64_t mediaTimeUs;
770        CHECK(entry.mBuffer->meta()->findInt64("timeUs", &mediaTimeUs));
771
772        if (mAnchorTimeMediaUs < 0) {
773            setAnchorTime(mediaTimeUs, nowUs);
774            realTimeUs = nowUs;
775        } else {
776            realTimeUs = getRealTimeUs(mediaTimeUs, nowUs);
777        }
778        if (!mHasAudio) {
779            mAnchorMaxMediaUs = mediaTimeUs + 100000; // smooth out videos >= 10fps
780        }
781
782        // Heuristics to handle situation when media time changed without a
783        // discontinuity. If we have not drained an audio buffer that was
784        // received after this buffer, repost in 10 msec. Otherwise repost
785        // in 500 msec.
786        delayUs = realTimeUs - nowUs;
787        if (delayUs > 500000) {
788            int64_t postDelayUs = 500000;
789            if (mHasAudio && (mLastAudioBufferDrained - entry.mBufferOrdinal) <= 0) {
790                postDelayUs = 10000;
791            }
792            msg->setWhat(kWhatPostDrainVideoQueue);
793            msg->post(postDelayUs);
794            mVideoScheduler->restart();
795            ALOGI("possible video time jump of %dms, retrying in %dms",
796                    (int)(delayUs / 1000), (int)(postDelayUs / 1000));
797            mDrainVideoQueuePending = true;
798            return;
799        }
800    }
801
802    realTimeUs = mVideoScheduler->schedule(realTimeUs * 1000) / 1000;
803    int64_t twoVsyncsUs = 2 * (mVideoScheduler->getVsyncPeriod() / 1000);
804
805    delayUs = realTimeUs - nowUs;
806
807    ALOGW_IF(delayUs > 500000, "unusually high delayUs: %" PRId64, delayUs);
808    // post 2 display refreshes before rendering is due
809    msg->post(delayUs > twoVsyncsUs ? delayUs - twoVsyncsUs : 0);
810
811    mDrainVideoQueuePending = true;
812}
813
814void NuPlayer::Renderer::onDrainVideoQueue() {
815    if (mVideoQueue.empty()) {
816        return;
817    }
818
819    QueueEntry *entry = &*mVideoQueue.begin();
820
821    if (entry->mBuffer == NULL) {
822        // EOS
823
824        notifyEOS(false /* audio */, entry->mFinalResult);
825
826        mVideoQueue.erase(mVideoQueue.begin());
827        entry = NULL;
828
829        setVideoLateByUs(0);
830        return;
831    }
832
833    int64_t nowUs = -1;
834    int64_t realTimeUs;
835    if (mFlags & FLAG_REAL_TIME) {
836        CHECK(entry->mBuffer->meta()->findInt64("timeUs", &realTimeUs));
837    } else {
838        int64_t mediaTimeUs;
839        CHECK(entry->mBuffer->meta()->findInt64("timeUs", &mediaTimeUs));
840
841        nowUs = ALooper::GetNowUs();
842        realTimeUs = getRealTimeUs(mediaTimeUs, nowUs);
843    }
844
845    bool tooLate = false;
846
847    if (!mPaused) {
848        if (nowUs == -1) {
849            nowUs = ALooper::GetNowUs();
850        }
851        setVideoLateByUs(nowUs - realTimeUs);
852        tooLate = (mVideoLateByUs > 40000);
853
854        if (tooLate) {
855            ALOGV("video late by %lld us (%.2f secs)",
856                 mVideoLateByUs, mVideoLateByUs / 1E6);
857        } else {
858            ALOGV("rendering video at media time %.2f secs",
859                    (mFlags & FLAG_REAL_TIME ? realTimeUs :
860                    (realTimeUs + mAnchorTimeMediaUs - mAnchorTimeRealUs)) / 1E6);
861        }
862    } else {
863        setVideoLateByUs(0);
864        if (!mVideoSampleReceived && !mHasAudio) {
865            // This will ensure that the first frame after a flush won't be used as anchor
866            // when renderer is in paused state, because resume can happen any time after seek.
867            setAnchorTime(-1, -1);
868        }
869    }
870
871    entry->mNotifyConsumed->setInt64("timestampNs", realTimeUs * 1000ll);
872    entry->mNotifyConsumed->setInt32("render", !tooLate);
873    entry->mNotifyConsumed->post();
874    mVideoQueue.erase(mVideoQueue.begin());
875    entry = NULL;
876
877    mVideoSampleReceived = true;
878
879    if (!mPaused) {
880        if (!mVideoRenderingStarted) {
881            mVideoRenderingStarted = true;
882            notifyVideoRenderingStart();
883        }
884        notifyIfMediaRenderingStarted();
885    }
886}
887
888void NuPlayer::Renderer::notifyVideoRenderingStart() {
889    sp<AMessage> notify = mNotify->dup();
890    notify->setInt32("what", kWhatVideoRenderingStart);
891    notify->post();
892}
893
894void NuPlayer::Renderer::notifyEOS(bool audio, status_t finalResult, int64_t delayUs) {
895    sp<AMessage> notify = mNotify->dup();
896    notify->setInt32("what", kWhatEOS);
897    notify->setInt32("audio", static_cast<int32_t>(audio));
898    notify->setInt32("finalResult", finalResult);
899    notify->post(delayUs);
900}
901
902void NuPlayer::Renderer::notifyAudioOffloadTearDown() {
903    (new AMessage(kWhatAudioOffloadTearDown, id()))->post();
904}
905
906void NuPlayer::Renderer::onQueueBuffer(const sp<AMessage> &msg) {
907    int32_t audio;
908    CHECK(msg->findInt32("audio", &audio));
909
910    setHasMedia(audio);
911
912    if (mHasVideo) {
913        if (mVideoScheduler == NULL) {
914            mVideoScheduler = new VideoFrameScheduler();
915            mVideoScheduler->init();
916        }
917    }
918
919    if (dropBufferWhileFlushing(audio, msg)) {
920        return;
921    }
922
923    sp<ABuffer> buffer;
924    CHECK(msg->findBuffer("buffer", &buffer));
925
926    sp<AMessage> notifyConsumed;
927    CHECK(msg->findMessage("notifyConsumed", &notifyConsumed));
928
929    QueueEntry entry;
930    entry.mBuffer = buffer;
931    entry.mNotifyConsumed = notifyConsumed;
932    entry.mOffset = 0;
933    entry.mFinalResult = OK;
934    entry.mBufferOrdinal = ++mTotalBuffersQueued;
935
936    if (audio) {
937        Mutex::Autolock autoLock(mLock);
938        mAudioQueue.push_back(entry);
939        postDrainAudioQueue_l();
940    } else {
941        mVideoQueue.push_back(entry);
942        postDrainVideoQueue();
943    }
944
945    Mutex::Autolock autoLock(mLock);
946    if (!mSyncQueues || mAudioQueue.empty() || mVideoQueue.empty()) {
947        return;
948    }
949
950    sp<ABuffer> firstAudioBuffer = (*mAudioQueue.begin()).mBuffer;
951    sp<ABuffer> firstVideoBuffer = (*mVideoQueue.begin()).mBuffer;
952
953    if (firstAudioBuffer == NULL || firstVideoBuffer == NULL) {
954        // EOS signalled on either queue.
955        syncQueuesDone_l();
956        return;
957    }
958
959    int64_t firstAudioTimeUs;
960    int64_t firstVideoTimeUs;
961    CHECK(firstAudioBuffer->meta()
962            ->findInt64("timeUs", &firstAudioTimeUs));
963    CHECK(firstVideoBuffer->meta()
964            ->findInt64("timeUs", &firstVideoTimeUs));
965
966    int64_t diff = firstVideoTimeUs - firstAudioTimeUs;
967
968    ALOGV("queueDiff = %.2f secs", diff / 1E6);
969
970    if (diff > 100000ll) {
971        // Audio data starts More than 0.1 secs before video.
972        // Drop some audio.
973
974        (*mAudioQueue.begin()).mNotifyConsumed->post();
975        mAudioQueue.erase(mAudioQueue.begin());
976        return;
977    }
978
979    syncQueuesDone_l();
980}
981
982void NuPlayer::Renderer::syncQueuesDone_l() {
983    if (!mSyncQueues) {
984        return;
985    }
986
987    mSyncQueues = false;
988
989    if (!mAudioQueue.empty()) {
990        postDrainAudioQueue_l();
991    }
992
993    if (!mVideoQueue.empty()) {
994        postDrainVideoQueue();
995    }
996}
997
998void NuPlayer::Renderer::onQueueEOS(const sp<AMessage> &msg) {
999    int32_t audio;
1000    CHECK(msg->findInt32("audio", &audio));
1001
1002    if (dropBufferWhileFlushing(audio, msg)) {
1003        return;
1004    }
1005
1006    int32_t finalResult;
1007    CHECK(msg->findInt32("finalResult", &finalResult));
1008
1009    QueueEntry entry;
1010    entry.mOffset = 0;
1011    entry.mFinalResult = finalResult;
1012
1013    if (audio) {
1014        Mutex::Autolock autoLock(mLock);
1015        if (mAudioQueue.empty() && mSyncQueues) {
1016            syncQueuesDone_l();
1017        }
1018        mAudioQueue.push_back(entry);
1019        postDrainAudioQueue_l();
1020    } else {
1021        if (mVideoQueue.empty() && mSyncQueues) {
1022            Mutex::Autolock autoLock(mLock);
1023            syncQueuesDone_l();
1024        }
1025        mVideoQueue.push_back(entry);
1026        postDrainVideoQueue();
1027    }
1028}
1029
1030void NuPlayer::Renderer::onFlush(const sp<AMessage> &msg) {
1031    int32_t audio, notifyComplete;
1032    CHECK(msg->findInt32("audio", &audio));
1033
1034    {
1035        Mutex::Autolock autoLock(mFlushLock);
1036        if (audio) {
1037            mFlushingAudio = false;
1038            notifyComplete = mNotifyCompleteAudio;
1039            mNotifyCompleteAudio = false;
1040        } else {
1041            mFlushingVideo = false;
1042            notifyComplete = mNotifyCompleteVideo;
1043            mNotifyCompleteVideo = false;
1044        }
1045    }
1046
1047    // If we're currently syncing the queues, i.e. dropping audio while
1048    // aligning the first audio/video buffer times and only one of the
1049    // two queues has data, we may starve that queue by not requesting
1050    // more buffers from the decoder. If the other source then encounters
1051    // a discontinuity that leads to flushing, we'll never find the
1052    // corresponding discontinuity on the other queue.
1053    // Therefore we'll stop syncing the queues if at least one of them
1054    // is flushed.
1055    {
1056         Mutex::Autolock autoLock(mLock);
1057         syncQueuesDone_l();
1058         setPauseStartedTimeRealUs(-1);
1059         setAnchorTime(-1, -1);
1060    }
1061
1062    ALOGV("flushing %s", audio ? "audio" : "video");
1063    if (audio) {
1064        {
1065            Mutex::Autolock autoLock(mLock);
1066            flushQueue(&mAudioQueue);
1067
1068            ++mAudioQueueGeneration;
1069            prepareForMediaRenderingStart();
1070
1071            if (offloadingAudio()) {
1072                setAudioFirstAnchorTime(-1);
1073            }
1074        }
1075
1076        mDrainAudioQueuePending = false;
1077
1078        if (offloadingAudio()) {
1079            mAudioSink->pause();
1080            mAudioSink->flush();
1081            mAudioSink->start();
1082        }
1083    } else {
1084        flushQueue(&mVideoQueue);
1085
1086        mDrainVideoQueuePending = false;
1087        ++mVideoQueueGeneration;
1088
1089        if (mVideoScheduler != NULL) {
1090            mVideoScheduler->restart();
1091        }
1092
1093        prepareForMediaRenderingStart();
1094    }
1095
1096    mVideoSampleReceived = false;
1097
1098    if (notifyComplete) {
1099        notifyFlushComplete(audio);
1100    }
1101}
1102
1103void NuPlayer::Renderer::flushQueue(List<QueueEntry> *queue) {
1104    while (!queue->empty()) {
1105        QueueEntry *entry = &*queue->begin();
1106
1107        if (entry->mBuffer != NULL) {
1108            entry->mNotifyConsumed->post();
1109        }
1110
1111        queue->erase(queue->begin());
1112        entry = NULL;
1113    }
1114}
1115
1116void NuPlayer::Renderer::notifyFlushComplete(bool audio) {
1117    sp<AMessage> notify = mNotify->dup();
1118    notify->setInt32("what", kWhatFlushComplete);
1119    notify->setInt32("audio", static_cast<int32_t>(audio));
1120    notify->post();
1121}
1122
1123bool NuPlayer::Renderer::dropBufferWhileFlushing(
1124        bool audio, const sp<AMessage> &msg) {
1125    bool flushing = false;
1126
1127    {
1128        Mutex::Autolock autoLock(mFlushLock);
1129        if (audio) {
1130            flushing = mFlushingAudio;
1131        } else {
1132            flushing = mFlushingVideo;
1133        }
1134    }
1135
1136    if (!flushing) {
1137        return false;
1138    }
1139
1140    sp<AMessage> notifyConsumed;
1141    if (msg->findMessage("notifyConsumed", &notifyConsumed)) {
1142        notifyConsumed->post();
1143    }
1144
1145    return true;
1146}
1147
1148void NuPlayer::Renderer::onAudioSinkChanged() {
1149    if (offloadingAudio()) {
1150        return;
1151    }
1152    CHECK(!mDrainAudioQueuePending);
1153    mNumFramesWritten = 0;
1154    mAnchorNumFramesWritten = -1;
1155    uint32_t written;
1156    if (mAudioSink->getFramesWritten(&written) == OK) {
1157        mNumFramesWritten = written;
1158    }
1159}
1160
1161void NuPlayer::Renderer::onDisableOffloadAudio() {
1162    Mutex::Autolock autoLock(mLock);
1163    mFlags &= ~FLAG_OFFLOAD_AUDIO;
1164    ++mAudioQueueGeneration;
1165}
1166
1167void NuPlayer::Renderer::onEnableOffloadAudio() {
1168    Mutex::Autolock autoLock(mLock);
1169    mFlags |= FLAG_OFFLOAD_AUDIO;
1170    ++mAudioQueueGeneration;
1171}
1172
1173void NuPlayer::Renderer::onPause() {
1174    if (mPaused) {
1175        ALOGW("Renderer::onPause() called while already paused!");
1176        return;
1177    }
1178    {
1179        Mutex::Autolock autoLock(mLock);
1180        ++mAudioQueueGeneration;
1181        ++mVideoQueueGeneration;
1182        prepareForMediaRenderingStart();
1183        mPaused = true;
1184        setPauseStartedTimeRealUs(ALooper::GetNowUs());
1185    }
1186
1187    mDrainAudioQueuePending = false;
1188    mDrainVideoQueuePending = false;
1189
1190    if (mHasAudio) {
1191        mAudioSink->pause();
1192        startAudioOffloadPauseTimeout();
1193    }
1194
1195    ALOGV("now paused audio queue has %d entries, video has %d entries",
1196          mAudioQueue.size(), mVideoQueue.size());
1197}
1198
1199void NuPlayer::Renderer::onResume() {
1200    if (!mPaused) {
1201        return;
1202    }
1203
1204    if (mHasAudio) {
1205        cancelAudioOffloadPauseTimeout();
1206        mAudioSink->start();
1207    }
1208
1209    Mutex::Autolock autoLock(mLock);
1210    mPaused = false;
1211    if (mPauseStartedTimeRealUs != -1) {
1212        int64_t newAnchorRealUs =
1213            mAnchorTimeRealUs + ALooper::GetNowUs() - mPauseStartedTimeRealUs;
1214        setAnchorTime(
1215                mAnchorTimeMediaUs, newAnchorRealUs, mAnchorNumFramesWritten, true /* resume */);
1216    }
1217
1218    if (!mAudioQueue.empty()) {
1219        postDrainAudioQueue_l();
1220    }
1221
1222    if (!mVideoQueue.empty()) {
1223        postDrainVideoQueue();
1224    }
1225}
1226
1227void NuPlayer::Renderer::onSetVideoFrameRate(float fps) {
1228    if (mVideoScheduler == NULL) {
1229        mVideoScheduler = new VideoFrameScheduler();
1230    }
1231    mVideoScheduler->init(fps);
1232}
1233
1234// TODO: Remove unnecessary calls to getPlayedOutAudioDurationUs()
1235// as it acquires locks and may query the audio driver.
1236//
1237// Some calls could conceivably retrieve extrapolated data instead of
1238// accessing getTimestamp() or getPosition() every time a data buffer with
1239// a media time is received.
1240//
1241int64_t NuPlayer::Renderer::getPlayedOutAudioDurationUs(int64_t nowUs) {
1242    uint32_t numFramesPlayed;
1243    int64_t numFramesPlayedAt;
1244    AudioTimestamp ts;
1245    static const int64_t kStaleTimestamp100ms = 100000;
1246
1247    status_t res = mAudioSink->getTimestamp(ts);
1248    if (res == OK) {                 // case 1: mixing audio tracks and offloaded tracks.
1249        numFramesPlayed = ts.mPosition;
1250        numFramesPlayedAt =
1251            ts.mTime.tv_sec * 1000000LL + ts.mTime.tv_nsec / 1000;
1252        const int64_t timestampAge = nowUs - numFramesPlayedAt;
1253        if (timestampAge > kStaleTimestamp100ms) {
1254            // This is an audio FIXME.
1255            // getTimestamp returns a timestamp which may come from audio mixing threads.
1256            // After pausing, the MixerThread may go idle, thus the mTime estimate may
1257            // become stale. Assuming that the MixerThread runs 20ms, with FastMixer at 5ms,
1258            // the max latency should be about 25ms with an average around 12ms (to be verified).
1259            // For safety we use 100ms.
1260            ALOGV("getTimestamp: returned stale timestamp nowUs(%lld) numFramesPlayedAt(%lld)",
1261                    (long long)nowUs, (long long)numFramesPlayedAt);
1262            numFramesPlayedAt = nowUs - kStaleTimestamp100ms;
1263        }
1264        //ALOGD("getTimestamp: OK %d %lld", numFramesPlayed, (long long)numFramesPlayedAt);
1265    } else if (res == WOULD_BLOCK) { // case 2: transitory state on start of a new track
1266        numFramesPlayed = 0;
1267        numFramesPlayedAt = nowUs;
1268        //ALOGD("getTimestamp: WOULD_BLOCK %d %lld",
1269        //        numFramesPlayed, (long long)numFramesPlayedAt);
1270    } else {                         // case 3: transitory at new track or audio fast tracks.
1271        res = mAudioSink->getPosition(&numFramesPlayed);
1272        CHECK_EQ(res, (status_t)OK);
1273        numFramesPlayedAt = nowUs;
1274        numFramesPlayedAt += 1000LL * mAudioSink->latency() / 2; /* XXX */
1275        //ALOGD("getPosition: %d %lld", numFramesPlayed, numFramesPlayedAt);
1276    }
1277
1278    // TODO: remove the (int32_t) casting below as it may overflow at 12.4 hours.
1279    //CHECK_EQ(numFramesPlayed & (1 << 31), 0);  // can't be negative until 12.4 hrs, test
1280    int64_t durationUs = (int64_t)((int32_t)numFramesPlayed * 1000LL * mAudioSink->msecsPerFrame())
1281            + nowUs - numFramesPlayedAt;
1282    if (durationUs < 0) {
1283        // Occurs when numFramesPlayed position is very small and the following:
1284        // (1) In case 1, the time nowUs is computed before getTimestamp() is called and
1285        //     numFramesPlayedAt is greater than nowUs by time more than numFramesPlayed.
1286        // (2) In case 3, using getPosition and adding mAudioSink->latency() to
1287        //     numFramesPlayedAt, by a time amount greater than numFramesPlayed.
1288        //
1289        // Both of these are transitory conditions.
1290        ALOGV("getPlayedOutAudioDurationUs: negative duration %lld set to zero", (long long)durationUs);
1291        durationUs = 0;
1292    }
1293    ALOGV("getPlayedOutAudioDurationUs(%lld) nowUs(%lld) frames(%u) framesAt(%lld)",
1294            (long long)durationUs, (long long)nowUs, numFramesPlayed, (long long)numFramesPlayedAt);
1295    return durationUs;
1296}
1297
1298void NuPlayer::Renderer::onAudioOffloadTearDown(AudioOffloadTearDownReason reason) {
1299    if (mAudioOffloadTornDown) {
1300        return;
1301    }
1302    mAudioOffloadTornDown = true;
1303
1304    int64_t currentPositionUs;
1305    if (getCurrentPosition(&currentPositionUs) != OK) {
1306        currentPositionUs = 0;
1307    }
1308
1309    mAudioSink->stop();
1310    mAudioSink->flush();
1311
1312    sp<AMessage> notify = mNotify->dup();
1313    notify->setInt32("what", kWhatAudioOffloadTearDown);
1314    notify->setInt64("positionUs", currentPositionUs);
1315    notify->setInt32("reason", reason);
1316    notify->post();
1317}
1318
1319void NuPlayer::Renderer::startAudioOffloadPauseTimeout() {
1320    if (offloadingAudio()) {
1321        sp<AMessage> msg = new AMessage(kWhatAudioOffloadPauseTimeout, id());
1322        msg->setInt32("generation", mAudioOffloadPauseTimeoutGeneration);
1323        msg->post(kOffloadPauseMaxUs);
1324    }
1325}
1326
1327void NuPlayer::Renderer::cancelAudioOffloadPauseTimeout() {
1328    if (offloadingAudio()) {
1329        ++mAudioOffloadPauseTimeoutGeneration;
1330    }
1331}
1332
1333status_t NuPlayer::Renderer::onOpenAudioSink(
1334        const sp<AMessage> &format,
1335        bool offloadOnly,
1336        bool hasVideo,
1337        uint32_t flags) {
1338    ALOGV("openAudioSink: offloadOnly(%d) offloadingAudio(%d)",
1339            offloadOnly, offloadingAudio());
1340    bool audioSinkChanged = false;
1341
1342    int32_t numChannels;
1343    CHECK(format->findInt32("channel-count", &numChannels));
1344
1345    int32_t channelMask;
1346    if (!format->findInt32("channel-mask", &channelMask)) {
1347        // signal to the AudioSink to derive the mask from count.
1348        channelMask = CHANNEL_MASK_USE_CHANNEL_ORDER;
1349    }
1350
1351    int32_t sampleRate;
1352    CHECK(format->findInt32("sample-rate", &sampleRate));
1353
1354    if (offloadingAudio()) {
1355        audio_format_t audioFormat = AUDIO_FORMAT_PCM_16_BIT;
1356        AString mime;
1357        CHECK(format->findString("mime", &mime));
1358        status_t err = mapMimeToAudioFormat(audioFormat, mime.c_str());
1359
1360        if (err != OK) {
1361            ALOGE("Couldn't map mime \"%s\" to a valid "
1362                    "audio_format", mime.c_str());
1363            onDisableOffloadAudio();
1364        } else {
1365            ALOGV("Mime \"%s\" mapped to audio_format 0x%x",
1366                    mime.c_str(), audioFormat);
1367
1368            int avgBitRate = -1;
1369            format->findInt32("bit-rate", &avgBitRate);
1370
1371            int32_t aacProfile = -1;
1372            if (audioFormat == AUDIO_FORMAT_AAC
1373                    && format->findInt32("aac-profile", &aacProfile)) {
1374                // Redefine AAC format as per aac profile
1375                mapAACProfileToAudioFormat(
1376                        audioFormat,
1377                        aacProfile);
1378            }
1379
1380            audio_offload_info_t offloadInfo = AUDIO_INFO_INITIALIZER;
1381            offloadInfo.duration_us = -1;
1382            format->findInt64(
1383                    "durationUs", &offloadInfo.duration_us);
1384            offloadInfo.sample_rate = sampleRate;
1385            offloadInfo.channel_mask = channelMask;
1386            offloadInfo.format = audioFormat;
1387            offloadInfo.stream_type = AUDIO_STREAM_MUSIC;
1388            offloadInfo.bit_rate = avgBitRate;
1389            offloadInfo.has_video = hasVideo;
1390            offloadInfo.is_streaming = true;
1391
1392            if (memcmp(&mCurrentOffloadInfo, &offloadInfo, sizeof(offloadInfo)) == 0) {
1393                ALOGV("openAudioSink: no change in offload mode");
1394                // no change from previous configuration, everything ok.
1395                return OK;
1396            }
1397            ALOGV("openAudioSink: try to open AudioSink in offload mode");
1398            uint32_t offloadFlags = flags;
1399            offloadFlags |= AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD;
1400            offloadFlags &= ~AUDIO_OUTPUT_FLAG_DEEP_BUFFER;
1401            audioSinkChanged = true;
1402            mAudioSink->close();
1403            err = mAudioSink->open(
1404                    sampleRate,
1405                    numChannels,
1406                    (audio_channel_mask_t)channelMask,
1407                    audioFormat,
1408                    8 /* bufferCount */,
1409                    &NuPlayer::Renderer::AudioSinkCallback,
1410                    this,
1411                    (audio_output_flags_t)offloadFlags,
1412                    &offloadInfo);
1413
1414            if (err == OK) {
1415                // If the playback is offloaded to h/w, we pass
1416                // the HAL some metadata information.
1417                // We don't want to do this for PCM because it
1418                // will be going through the AudioFlinger mixer
1419                // before reaching the hardware.
1420                // TODO
1421                mCurrentOffloadInfo = offloadInfo;
1422                err = mAudioSink->start();
1423                ALOGV_IF(err == OK, "openAudioSink: offload succeeded");
1424            }
1425            if (err != OK) {
1426                // Clean up, fall back to non offload mode.
1427                mAudioSink->close();
1428                onDisableOffloadAudio();
1429                mCurrentOffloadInfo = AUDIO_INFO_INITIALIZER;
1430                ALOGV("openAudioSink: offload failed");
1431            }
1432        }
1433    }
1434    if (!offloadOnly && !offloadingAudio()) {
1435        ALOGV("openAudioSink: open AudioSink in NON-offload mode");
1436        uint32_t pcmFlags = flags;
1437        pcmFlags &= ~AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD;
1438        audioSinkChanged = true;
1439        mAudioSink->close();
1440        mCurrentOffloadInfo = AUDIO_INFO_INITIALIZER;
1441        status_t err = mAudioSink->open(
1442                    sampleRate,
1443                    numChannels,
1444                    (audio_channel_mask_t)channelMask,
1445                    AUDIO_FORMAT_PCM_16_BIT,
1446                    8 /* bufferCount */,
1447                    NULL,
1448                    NULL,
1449                    (audio_output_flags_t)pcmFlags);
1450        if (err != OK) {
1451            ALOGW("openAudioSink: non offloaded open failed status: %d", err);
1452            return err;
1453        }
1454        mAudioSink->start();
1455    }
1456    if (audioSinkChanged) {
1457        onAudioSinkChanged();
1458    }
1459    if (offloadingAudio()) {
1460        mAudioOffloadTornDown = false;
1461    }
1462    return OK;
1463}
1464
1465void NuPlayer::Renderer::onCloseAudioSink() {
1466    mAudioSink->close();
1467    mCurrentOffloadInfo = AUDIO_INFO_INITIALIZER;
1468}
1469
1470}  // namespace android
1471
1472