GenericSource.cpp revision dc6f340e537ce511ea1d2f8ce7dc1c4ed231f6a6 
1/*
2 * Copyright (C) 2012 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 "GenericSource"
19
20#include "GenericSource.h"
21
22#include "AnotherPacketSource.h"
23
24#include <media/IMediaHTTPService.h>
25#include <media/stagefright/foundation/ABuffer.h>
26#include <media/stagefright/foundation/ADebug.h>
27#include <media/stagefright/foundation/AMessage.h>
28#include <media/stagefright/DataSource.h>
29#include <media/stagefright/FileSource.h>
30#include <media/stagefright/MediaBuffer.h>
31#include <media/stagefright/MediaDefs.h>
32#include <media/stagefright/MediaExtractor.h>
33#include <media/stagefright/MediaSource.h>
34#include <media/stagefright/MetaData.h>
35#include <media/stagefright/Utils.h>
36#include "../../libstagefright/include/NuCachedSource2.h"
37#include "../../libstagefright/include/HTTPBase.h"
38
39namespace android {
40
41static const int kLowWaterMarkMs          = 2000;  // 2secs
42static const int kHighWaterMarkMs         = 5000;  // 5secs
43static const int kHighWaterMarkRebufferMs = 15000;  // 15secs
44
45static const int kLowWaterMarkKB  = 40;
46static const int kHighWaterMarkKB = 200;
47
48NuPlayer::GenericSource::GenericSource(
49        const sp<AMessage> &notify,
50        bool uidValid,
51        uid_t uid)
52    : Source(notify),
53      mAudioTimeUs(0),
54      mAudioLastDequeueTimeUs(0),
55      mVideoTimeUs(0),
56      mVideoLastDequeueTimeUs(0),
57      mFetchSubtitleDataGeneration(0),
58      mFetchTimedTextDataGeneration(0),
59      mDurationUs(-1ll),
60      mAudioIsVorbis(false),
61      mIsSecure(false),
62      mIsStreaming(false),
63      mUIDValid(uidValid),
64      mUID(uid),
65      mFd(-1),
66      mDrmManagerClient(NULL),
67      mBitrate(-1ll),
68      mPendingReadBufferTypes(0) {
69    mBufferingMonitor = new BufferingMonitor(notify);
70    resetDataSource();
71}
72
73void NuPlayer::GenericSource::resetDataSource() {
74    mHTTPService.clear();
75    mHttpSource.clear();
76    mUri.clear();
77    mUriHeaders.clear();
78    if (mFd >= 0) {
79        close(mFd);
80        mFd = -1;
81    }
82    mOffset = 0;
83    mLength = 0;
84    setDrmPlaybackStatusIfNeeded(Playback::STOP, 0);
85    mDecryptHandle = NULL;
86    mDrmManagerClient = NULL;
87    mStarted = false;
88    mStopRead = true;
89
90    if (mBufferingMonitorLooper != NULL) {
91        mBufferingMonitorLooper->unregisterHandler(mBufferingMonitor->id());
92        mBufferingMonitorLooper->stop();
93        mBufferingMonitorLooper = NULL;
94    }
95    mBufferingMonitor->stop();
96}
97
98status_t NuPlayer::GenericSource::setDataSource(
99        const sp<IMediaHTTPService> &httpService,
100        const char *url,
101        const KeyedVector<String8, String8> *headers) {
102    resetDataSource();
103
104    mHTTPService = httpService;
105    mUri = url;
106
107    if (headers) {
108        mUriHeaders = *headers;
109    }
110
111    // delay data source creation to prepareAsync() to avoid blocking
112    // the calling thread in setDataSource for any significant time.
113    return OK;
114}
115
116status_t NuPlayer::GenericSource::setDataSource(
117        int fd, int64_t offset, int64_t length) {
118    resetDataSource();
119
120    mFd = dup(fd);
121    mOffset = offset;
122    mLength = length;
123
124    // delay data source creation to prepareAsync() to avoid blocking
125    // the calling thread in setDataSource for any significant time.
126    return OK;
127}
128
129status_t NuPlayer::GenericSource::setDataSource(const sp<DataSource>& source) {
130    resetDataSource();
131    mDataSource = source;
132    return OK;
133}
134
135sp<MetaData> NuPlayer::GenericSource::getFileFormatMeta() const {
136    return mFileMeta;
137}
138
139status_t NuPlayer::GenericSource::initFromDataSource() {
140    sp<IMediaExtractor> extractor;
141    CHECK(mDataSource != NULL);
142
143    extractor = MediaExtractor::Create(mDataSource, NULL);
144
145    if (extractor == NULL) {
146        return UNKNOWN_ERROR;
147    }
148
149    mFileMeta = extractor->getMetaData();
150    if (mFileMeta != NULL) {
151        int64_t duration;
152        if (mFileMeta->findInt64(kKeyDuration, &duration)) {
153            mDurationUs = duration;
154        }
155    }
156
157    int32_t totalBitrate = 0;
158
159    size_t numtracks = extractor->countTracks();
160    if (numtracks == 0) {
161        return UNKNOWN_ERROR;
162    }
163
164    for (size_t i = 0; i < numtracks; ++i) {
165        sp<IMediaSource> track = extractor->getTrack(i);
166        if (track == NULL) {
167            continue;
168        }
169
170        sp<MetaData> meta = extractor->getTrackMetaData(i);
171        if (meta == NULL) {
172            ALOGE("no metadata for track %zu", i);
173            return UNKNOWN_ERROR;
174        }
175
176        const char *mime;
177        CHECK(meta->findCString(kKeyMIMEType, &mime));
178
179        // Do the string compare immediately with "mime",
180        // we can't assume "mime" would stay valid after another
181        // extractor operation, some extractors might modify meta
182        // during getTrack() and make it invalid.
183        if (!strncasecmp(mime, "audio/", 6)) {
184            if (mAudioTrack.mSource == NULL) {
185                mAudioTrack.mIndex = i;
186                mAudioTrack.mSource = track;
187                mAudioTrack.mPackets =
188                    new AnotherPacketSource(mAudioTrack.mSource->getFormat());
189
190                if (!strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_VORBIS)) {
191                    mAudioIsVorbis = true;
192                } else {
193                    mAudioIsVorbis = false;
194                }
195            }
196        } else if (!strncasecmp(mime, "video/", 6)) {
197            if (mVideoTrack.mSource == NULL) {
198                mVideoTrack.mIndex = i;
199                mVideoTrack.mSource = track;
200                mVideoTrack.mPackets =
201                    new AnotherPacketSource(mVideoTrack.mSource->getFormat());
202
203                // check if the source requires secure buffers
204                int32_t secure;
205                if (meta->findInt32(kKeyRequiresSecureBuffers, &secure)
206                        && secure) {
207                    mIsSecure = true;
208                    if (mUIDValid) {
209                        extractor->setUID(mUID);
210                    }
211                }
212            }
213        }
214
215        mSources.push(track);
216        int64_t durationUs;
217        if (meta->findInt64(kKeyDuration, &durationUs)) {
218            if (durationUs > mDurationUs) {
219                mDurationUs = durationUs;
220            }
221        }
222
223        int32_t bitrate;
224        if (totalBitrate >= 0 && meta->findInt32(kKeyBitRate, &bitrate)) {
225            totalBitrate += bitrate;
226        } else {
227            totalBitrate = -1;
228        }
229    }
230
231    if (mSources.size() == 0) {
232        ALOGE("b/23705695");
233        return UNKNOWN_ERROR;
234    }
235
236    mBitrate = totalBitrate;
237
238    return OK;
239}
240
241status_t NuPlayer::GenericSource::getDefaultBufferingSettings(
242        BufferingSettings* buffering /* nonnull */) {
243    mBufferingMonitor->getDefaultBufferingSettings(buffering);
244    return OK;
245}
246
247status_t NuPlayer::GenericSource::setBufferingSettings(const BufferingSettings& buffering) {
248    return mBufferingMonitor->setBufferingSettings(buffering);
249}
250
251status_t NuPlayer::GenericSource::startSources() {
252    // Start the selected A/V tracks now before we start buffering.
253    // Widevine sources might re-initialize crypto when starting, if we delay
254    // this to start(), all data buffered during prepare would be wasted.
255    // (We don't actually start reading until start().)
256    //
257    // TODO: this logic may no longer be relevant after the removal of widevine
258    // support
259    if (mAudioTrack.mSource != NULL && mAudioTrack.mSource->start() != OK) {
260        ALOGE("failed to start audio track!");
261        return UNKNOWN_ERROR;
262    }
263
264    if (mVideoTrack.mSource != NULL && mVideoTrack.mSource->start() != OK) {
265        ALOGE("failed to start video track!");
266        return UNKNOWN_ERROR;
267    }
268
269    return OK;
270}
271
272int64_t NuPlayer::GenericSource::getLastReadPosition() {
273    if (mAudioTrack.mSource != NULL) {
274        return mAudioTimeUs;
275    } else if (mVideoTrack.mSource != NULL) {
276        return mVideoTimeUs;
277    } else {
278        return 0;
279    }
280}
281
282status_t NuPlayer::GenericSource::setBuffers(
283        bool audio, Vector<MediaBuffer *> &buffers) {
284    if (mIsSecure && !audio && mVideoTrack.mSource != NULL) {
285        return mVideoTrack.mSource->setBuffers(buffers);
286    }
287    return INVALID_OPERATION;
288}
289
290bool NuPlayer::GenericSource::isStreaming() const {
291    return mIsStreaming;
292}
293
294void NuPlayer::GenericSource::setOffloadAudio(bool offload) {
295    mBufferingMonitor->setOffloadAudio(offload);
296}
297
298NuPlayer::GenericSource::~GenericSource() {
299    if (mLooper != NULL) {
300        mLooper->unregisterHandler(id());
301        mLooper->stop();
302    }
303    resetDataSource();
304}
305
306void NuPlayer::GenericSource::prepareAsync() {
307    if (mLooper == NULL) {
308        mLooper = new ALooper;
309        mLooper->setName("generic");
310        mLooper->start();
311
312        mLooper->registerHandler(this);
313    }
314
315    sp<AMessage> msg = new AMessage(kWhatPrepareAsync, this);
316    msg->post();
317}
318
319void NuPlayer::GenericSource::onPrepareAsync() {
320    // delayed data source creation
321    if (mDataSource == NULL) {
322        // set to false first, if the extractor
323        // comes back as secure, set it to true then.
324        mIsSecure = false;
325
326        if (!mUri.empty()) {
327            const char* uri = mUri.c_str();
328            String8 contentType;
329
330            if (!strncasecmp("http://", uri, 7) || !strncasecmp("https://", uri, 8)) {
331                mHttpSource = DataSource::CreateMediaHTTP(mHTTPService);
332                if (mHttpSource == NULL) {
333                    ALOGE("Failed to create http source!");
334                    notifyPreparedAndCleanup(UNKNOWN_ERROR);
335                    return;
336                }
337            }
338
339            mDataSource = DataSource::CreateFromURI(
340                   mHTTPService, uri, &mUriHeaders, &contentType,
341                   static_cast<HTTPBase *>(mHttpSource.get()));
342        } else {
343            mDataSource = new FileSource(mFd, mOffset, mLength);
344            mFd = -1;
345        }
346
347        if (mDataSource == NULL) {
348            ALOGE("Failed to create data source!");
349            notifyPreparedAndCleanup(UNKNOWN_ERROR);
350            return;
351        }
352    }
353
354    if (mDataSource->flags() & DataSource::kIsCachingDataSource) {
355        mCachedSource = static_cast<NuCachedSource2 *>(mDataSource.get());
356    }
357
358    // For cached streaming cases, we need to wait for enough
359    // buffering before reporting prepared.
360    mIsStreaming = (mCachedSource != NULL);
361
362    // init extractor from data source
363    status_t err = initFromDataSource();
364
365    if (err != OK) {
366        ALOGE("Failed to init from data source!");
367        notifyPreparedAndCleanup(err);
368        return;
369    }
370
371    if (mVideoTrack.mSource != NULL) {
372        sp<MetaData> meta = doGetFormatMeta(false /* audio */);
373        sp<AMessage> msg = new AMessage;
374        err = convertMetaDataToMessage(meta, &msg);
375        if(err != OK) {
376            notifyPreparedAndCleanup(err);
377            return;
378        }
379        notifyVideoSizeChanged(msg);
380    }
381
382    notifyFlagsChanged(
383            (mIsSecure ? FLAG_SECURE : 0)
384            | (mDecryptHandle != NULL ? FLAG_PROTECTED : 0)
385            | FLAG_CAN_PAUSE
386            | FLAG_CAN_SEEK_BACKWARD
387            | FLAG_CAN_SEEK_FORWARD
388            | FLAG_CAN_SEEK);
389
390    if (mIsSecure) {
391        // secure decoders must be instantiated before starting widevine source
392        //
393        // TODO: mIsSecure and FLAG_SECURE may be obsolete, revisit after
394        // removing widevine
395        sp<AMessage> reply = new AMessage(kWhatSecureDecodersInstantiated, this);
396        notifyInstantiateSecureDecoders(reply);
397    } else {
398        finishPrepareAsync();
399    }
400}
401
402void NuPlayer::GenericSource::onSecureDecodersInstantiated(status_t err) {
403    if (err != OK) {
404        ALOGE("Failed to instantiate secure decoders!");
405        notifyPreparedAndCleanup(err);
406        return;
407    }
408    finishPrepareAsync();
409}
410
411void NuPlayer::GenericSource::finishPrepareAsync() {
412    status_t err = startSources();
413    if (err != OK) {
414        ALOGE("Failed to init start data source!");
415        notifyPreparedAndCleanup(err);
416        return;
417    }
418
419    if (mIsStreaming) {
420        if (mBufferingMonitorLooper == NULL) {
421            mBufferingMonitor->prepare(mCachedSource, mDurationUs, mBitrate,
422                    mIsStreaming);
423
424            mBufferingMonitorLooper = new ALooper;
425            mBufferingMonitorLooper->setName("GSBMonitor");
426            mBufferingMonitorLooper->start();
427            mBufferingMonitorLooper->registerHandler(mBufferingMonitor);
428        }
429
430        mBufferingMonitor->ensureCacheIsFetching();
431        mBufferingMonitor->restartPollBuffering();
432    } else {
433        notifyPrepared();
434    }
435}
436
437void NuPlayer::GenericSource::notifyPreparedAndCleanup(status_t err) {
438    if (err != OK) {
439        {
440            sp<DataSource> dataSource = mDataSource;
441            sp<NuCachedSource2> cachedSource = mCachedSource;
442            sp<DataSource> httpSource = mHttpSource;
443            {
444                Mutex::Autolock _l(mDisconnectLock);
445                mDataSource.clear();
446                mDecryptHandle = NULL;
447                mDrmManagerClient = NULL;
448                mCachedSource.clear();
449                mHttpSource.clear();
450            }
451        }
452        mBitrate = -1;
453
454        mBufferingMonitor->cancelPollBuffering();
455    }
456    notifyPrepared(err);
457}
458
459void NuPlayer::GenericSource::start() {
460    ALOGI("start");
461
462    mStopRead = false;
463    if (mAudioTrack.mSource != NULL) {
464        postReadBuffer(MEDIA_TRACK_TYPE_AUDIO);
465    }
466
467    if (mVideoTrack.mSource != NULL) {
468        postReadBuffer(MEDIA_TRACK_TYPE_VIDEO);
469    }
470
471    setDrmPlaybackStatusIfNeeded(Playback::START, getLastReadPosition() / 1000);
472    mStarted = true;
473
474    (new AMessage(kWhatStart, this))->post();
475}
476
477void NuPlayer::GenericSource::stop() {
478    // nothing to do, just account for DRM playback status
479    setDrmPlaybackStatusIfNeeded(Playback::STOP, 0);
480    mStarted = false;
481}
482
483void NuPlayer::GenericSource::pause() {
484    // nothing to do, just account for DRM playback status
485    setDrmPlaybackStatusIfNeeded(Playback::PAUSE, 0);
486    mStarted = false;
487}
488
489void NuPlayer::GenericSource::resume() {
490    // nothing to do, just account for DRM playback status
491    setDrmPlaybackStatusIfNeeded(Playback::START, getLastReadPosition() / 1000);
492    mStarted = true;
493
494    (new AMessage(kWhatResume, this))->post();
495}
496
497void NuPlayer::GenericSource::disconnect() {
498    sp<DataSource> dataSource, httpSource;
499    {
500        Mutex::Autolock _l(mDisconnectLock);
501        dataSource = mDataSource;
502        httpSource = mHttpSource;
503    }
504
505    if (dataSource != NULL) {
506        // disconnect data source
507        if (dataSource->flags() & DataSource::kIsCachingDataSource) {
508            static_cast<NuCachedSource2 *>(dataSource.get())->disconnect();
509        }
510    } else if (httpSource != NULL) {
511        static_cast<HTTPBase *>(httpSource.get())->disconnect();
512    }
513}
514
515void NuPlayer::GenericSource::setDrmPlaybackStatusIfNeeded(int playbackStatus, int64_t position) {
516    if (mDecryptHandle != NULL) {
517        mDrmManagerClient->setPlaybackStatus(mDecryptHandle, playbackStatus, position);
518    }
519    mSubtitleTrack.mPackets = new AnotherPacketSource(NULL);
520    mTimedTextTrack.mPackets = new AnotherPacketSource(NULL);
521}
522
523status_t NuPlayer::GenericSource::feedMoreTSData() {
524    return OK;
525}
526
527void NuPlayer::GenericSource::onMessageReceived(const sp<AMessage> &msg) {
528    switch (msg->what()) {
529      case kWhatPrepareAsync:
530      {
531          onPrepareAsync();
532          break;
533      }
534      case kWhatFetchSubtitleData:
535      {
536          fetchTextData(kWhatSendSubtitleData, MEDIA_TRACK_TYPE_SUBTITLE,
537                  mFetchSubtitleDataGeneration, mSubtitleTrack.mPackets, msg);
538          break;
539      }
540
541      case kWhatFetchTimedTextData:
542      {
543          fetchTextData(kWhatSendTimedTextData, MEDIA_TRACK_TYPE_TIMEDTEXT,
544                  mFetchTimedTextDataGeneration, mTimedTextTrack.mPackets, msg);
545          break;
546      }
547
548      case kWhatSendSubtitleData:
549      {
550          sendTextData(kWhatSubtitleData, MEDIA_TRACK_TYPE_SUBTITLE,
551                  mFetchSubtitleDataGeneration, mSubtitleTrack.mPackets, msg);
552          break;
553      }
554
555      case kWhatSendGlobalTimedTextData:
556      {
557          sendGlobalTextData(kWhatTimedTextData, mFetchTimedTextDataGeneration, msg);
558          break;
559      }
560      case kWhatSendTimedTextData:
561      {
562          sendTextData(kWhatTimedTextData, MEDIA_TRACK_TYPE_TIMEDTEXT,
563                  mFetchTimedTextDataGeneration, mTimedTextTrack.mPackets, msg);
564          break;
565      }
566
567      case kWhatChangeAVSource:
568      {
569          int32_t trackIndex;
570          CHECK(msg->findInt32("trackIndex", &trackIndex));
571          const sp<IMediaSource> source = mSources.itemAt(trackIndex);
572
573          Track* track;
574          const char *mime;
575          media_track_type trackType, counterpartType;
576          sp<MetaData> meta = source->getFormat();
577          meta->findCString(kKeyMIMEType, &mime);
578          if (!strncasecmp(mime, "audio/", 6)) {
579              track = &mAudioTrack;
580              trackType = MEDIA_TRACK_TYPE_AUDIO;
581              counterpartType = MEDIA_TRACK_TYPE_VIDEO;;
582          } else {
583              CHECK(!strncasecmp(mime, "video/", 6));
584              track = &mVideoTrack;
585              trackType = MEDIA_TRACK_TYPE_VIDEO;
586              counterpartType = MEDIA_TRACK_TYPE_AUDIO;;
587          }
588
589
590          if (track->mSource != NULL) {
591              track->mSource->stop();
592          }
593          track->mSource = source;
594          track->mSource->start();
595          track->mIndex = trackIndex;
596
597          int64_t timeUs, actualTimeUs;
598          const bool formatChange = true;
599          if (trackType == MEDIA_TRACK_TYPE_AUDIO) {
600              timeUs = mAudioLastDequeueTimeUs;
601          } else {
602              timeUs = mVideoLastDequeueTimeUs;
603          }
604          readBuffer(trackType, timeUs, MediaPlayerSeekMode::SEEK_PREVIOUS_SYNC /* mode */,
605                  &actualTimeUs, formatChange);
606          readBuffer(counterpartType, -1, MediaPlayerSeekMode::SEEK_PREVIOUS_SYNC /* mode */,
607                  NULL, !formatChange);
608          ALOGV("timeUs %lld actualTimeUs %lld", (long long)timeUs, (long long)actualTimeUs);
609
610          break;
611      }
612
613      case kWhatStart:
614      case kWhatResume:
615      {
616          mBufferingMonitor->restartPollBuffering();
617          break;
618      }
619
620      case kWhatGetFormat:
621      {
622          onGetFormatMeta(msg);
623          break;
624      }
625
626      case kWhatGetSelectedTrack:
627      {
628          onGetSelectedTrack(msg);
629          break;
630      }
631
632      case kWhatGetTrackInfo:
633      {
634          onGetTrackInfo(msg);
635          break;
636      }
637
638      case kWhatSelectTrack:
639      {
640          onSelectTrack(msg);
641          break;
642      }
643
644      case kWhatSeek:
645      {
646          onSeek(msg);
647          break;
648      }
649
650      case kWhatReadBuffer:
651      {
652          onReadBuffer(msg);
653          break;
654      }
655
656      case kWhatSecureDecodersInstantiated:
657      {
658          int32_t err;
659          CHECK(msg->findInt32("err", &err));
660          onSecureDecodersInstantiated(err);
661          break;
662      }
663
664      default:
665          Source::onMessageReceived(msg);
666          break;
667    }
668}
669
670void NuPlayer::GenericSource::fetchTextData(
671        uint32_t sendWhat,
672        media_track_type type,
673        int32_t curGen,
674        const sp<AnotherPacketSource>& packets,
675        const sp<AMessage>& msg) {
676    int32_t msgGeneration;
677    CHECK(msg->findInt32("generation", &msgGeneration));
678    if (msgGeneration != curGen) {
679        // stale
680        return;
681    }
682
683    int32_t avail;
684    if (packets->hasBufferAvailable(&avail)) {
685        return;
686    }
687
688    int64_t timeUs;
689    CHECK(msg->findInt64("timeUs", &timeUs));
690
691    int64_t subTimeUs;
692    readBuffer(type, timeUs, MediaPlayerSeekMode::SEEK_PREVIOUS_SYNC /* mode */, &subTimeUs);
693
694    int64_t delayUs = subTimeUs - timeUs;
695    if (msg->what() == kWhatFetchSubtitleData) {
696        const int64_t oneSecUs = 1000000ll;
697        delayUs -= oneSecUs;
698    }
699    sp<AMessage> msg2 = new AMessage(sendWhat, this);
700    msg2->setInt32("generation", msgGeneration);
701    msg2->post(delayUs < 0 ? 0 : delayUs);
702}
703
704void NuPlayer::GenericSource::sendTextData(
705        uint32_t what,
706        media_track_type type,
707        int32_t curGen,
708        const sp<AnotherPacketSource>& packets,
709        const sp<AMessage>& msg) {
710    int32_t msgGeneration;
711    CHECK(msg->findInt32("generation", &msgGeneration));
712    if (msgGeneration != curGen) {
713        // stale
714        return;
715    }
716
717    int64_t subTimeUs;
718    if (packets->nextBufferTime(&subTimeUs) != OK) {
719        return;
720    }
721
722    int64_t nextSubTimeUs;
723    readBuffer(type, -1, MediaPlayerSeekMode::SEEK_PREVIOUS_SYNC /* mode */, &nextSubTimeUs);
724
725    sp<ABuffer> buffer;
726    status_t dequeueStatus = packets->dequeueAccessUnit(&buffer);
727    if (dequeueStatus == OK) {
728        sp<AMessage> notify = dupNotify();
729        notify->setInt32("what", what);
730        notify->setBuffer("buffer", buffer);
731        notify->post();
732
733        const int64_t delayUs = nextSubTimeUs - subTimeUs;
734        msg->post(delayUs < 0 ? 0 : delayUs);
735    }
736}
737
738void NuPlayer::GenericSource::sendGlobalTextData(
739        uint32_t what,
740        int32_t curGen,
741        sp<AMessage> msg) {
742    int32_t msgGeneration;
743    CHECK(msg->findInt32("generation", &msgGeneration));
744    if (msgGeneration != curGen) {
745        // stale
746        return;
747    }
748
749    uint32_t textType;
750    const void *data;
751    size_t size = 0;
752    if (mTimedTextTrack.mSource->getFormat()->findData(
753                    kKeyTextFormatData, &textType, &data, &size)) {
754        mGlobalTimedText = new ABuffer(size);
755        if (mGlobalTimedText->data()) {
756            memcpy(mGlobalTimedText->data(), data, size);
757            sp<AMessage> globalMeta = mGlobalTimedText->meta();
758            globalMeta->setInt64("timeUs", 0);
759            globalMeta->setString("mime", MEDIA_MIMETYPE_TEXT_3GPP);
760            globalMeta->setInt32("global", 1);
761            sp<AMessage> notify = dupNotify();
762            notify->setInt32("what", what);
763            notify->setBuffer("buffer", mGlobalTimedText);
764            notify->post();
765        }
766    }
767}
768
769sp<MetaData> NuPlayer::GenericSource::getFormatMeta(bool audio) {
770    sp<AMessage> msg = new AMessage(kWhatGetFormat, this);
771    msg->setInt32("audio", audio);
772
773    sp<AMessage> response;
774    sp<RefBase> format;
775    status_t err = msg->postAndAwaitResponse(&response);
776    if (err == OK && response != NULL) {
777        CHECK(response->findObject("format", &format));
778        return static_cast<MetaData*>(format.get());
779    } else {
780        return NULL;
781    }
782}
783
784void NuPlayer::GenericSource::onGetFormatMeta(const sp<AMessage>& msg) const {
785    int32_t audio;
786    CHECK(msg->findInt32("audio", &audio));
787
788    sp<AMessage> response = new AMessage;
789    sp<MetaData> format = doGetFormatMeta(audio);
790    response->setObject("format", format);
791
792    sp<AReplyToken> replyID;
793    CHECK(msg->senderAwaitsResponse(&replyID));
794    response->postReply(replyID);
795}
796
797sp<MetaData> NuPlayer::GenericSource::doGetFormatMeta(bool audio) const {
798    sp<IMediaSource> source = audio ? mAudioTrack.mSource : mVideoTrack.mSource;
799
800    if (source == NULL) {
801        return NULL;
802    }
803
804    return source->getFormat();
805}
806
807status_t NuPlayer::GenericSource::dequeueAccessUnit(
808        bool audio, sp<ABuffer> *accessUnit) {
809    if (audio && !mStarted) {
810        return -EWOULDBLOCK;
811    }
812
813    Track *track = audio ? &mAudioTrack : &mVideoTrack;
814
815    if (track->mSource == NULL) {
816        return -EWOULDBLOCK;
817    }
818
819    status_t finalResult;
820    if (!track->mPackets->hasBufferAvailable(&finalResult)) {
821        if (finalResult == OK) {
822            postReadBuffer(
823                    audio ? MEDIA_TRACK_TYPE_AUDIO : MEDIA_TRACK_TYPE_VIDEO);
824            return -EWOULDBLOCK;
825        }
826        return finalResult;
827    }
828
829    status_t result = track->mPackets->dequeueAccessUnit(accessUnit);
830
831    // start pulling in more buffers if we only have one (or no) buffer left
832    // so that decoder has less chance of being starved
833    if (track->mPackets->getAvailableBufferCount(&finalResult) < 2) {
834        postReadBuffer(audio? MEDIA_TRACK_TYPE_AUDIO : MEDIA_TRACK_TYPE_VIDEO);
835    }
836
837    if (result != OK) {
838        if (mSubtitleTrack.mSource != NULL) {
839            mSubtitleTrack.mPackets->clear();
840            mFetchSubtitleDataGeneration++;
841        }
842        if (mTimedTextTrack.mSource != NULL) {
843            mTimedTextTrack.mPackets->clear();
844            mFetchTimedTextDataGeneration++;
845        }
846        return result;
847    }
848
849    int64_t timeUs;
850    status_t eosResult; // ignored
851    CHECK((*accessUnit)->meta()->findInt64("timeUs", &timeUs));
852    if (audio) {
853        mAudioLastDequeueTimeUs = timeUs;
854        mBufferingMonitor->updateDequeuedBufferTime(timeUs);
855    } else {
856        mVideoLastDequeueTimeUs = timeUs;
857    }
858
859    if (mSubtitleTrack.mSource != NULL
860            && !mSubtitleTrack.mPackets->hasBufferAvailable(&eosResult)) {
861        sp<AMessage> msg = new AMessage(kWhatFetchSubtitleData, this);
862        msg->setInt64("timeUs", timeUs);
863        msg->setInt32("generation", mFetchSubtitleDataGeneration);
864        msg->post();
865    }
866
867    if (mTimedTextTrack.mSource != NULL
868            && !mTimedTextTrack.mPackets->hasBufferAvailable(&eosResult)) {
869        sp<AMessage> msg = new AMessage(kWhatFetchTimedTextData, this);
870        msg->setInt64("timeUs", timeUs);
871        msg->setInt32("generation", mFetchTimedTextDataGeneration);
872        msg->post();
873    }
874
875    return result;
876}
877
878status_t NuPlayer::GenericSource::getDuration(int64_t *durationUs) {
879    *durationUs = mDurationUs;
880    return OK;
881}
882
883size_t NuPlayer::GenericSource::getTrackCount() const {
884    return mSources.size();
885}
886
887sp<AMessage> NuPlayer::GenericSource::getTrackInfo(size_t trackIndex) const {
888    sp<AMessage> msg = new AMessage(kWhatGetTrackInfo, this);
889    msg->setSize("trackIndex", trackIndex);
890
891    sp<AMessage> response;
892    sp<RefBase> format;
893    status_t err = msg->postAndAwaitResponse(&response);
894    if (err == OK && response != NULL) {
895        CHECK(response->findObject("format", &format));
896        return static_cast<AMessage*>(format.get());
897    } else {
898        return NULL;
899    }
900}
901
902void NuPlayer::GenericSource::onGetTrackInfo(const sp<AMessage>& msg) const {
903    size_t trackIndex;
904    CHECK(msg->findSize("trackIndex", &trackIndex));
905
906    sp<AMessage> response = new AMessage;
907    sp<AMessage> format = doGetTrackInfo(trackIndex);
908    response->setObject("format", format);
909
910    sp<AReplyToken> replyID;
911    CHECK(msg->senderAwaitsResponse(&replyID));
912    response->postReply(replyID);
913}
914
915sp<AMessage> NuPlayer::GenericSource::doGetTrackInfo(size_t trackIndex) const {
916    size_t trackCount = mSources.size();
917    if (trackIndex >= trackCount) {
918        return NULL;
919    }
920
921    sp<AMessage> format = new AMessage();
922    sp<MetaData> meta = mSources.itemAt(trackIndex)->getFormat();
923    if (meta == NULL) {
924        ALOGE("no metadata for track %zu", trackIndex);
925        return NULL;
926    }
927
928    const char *mime;
929    CHECK(meta->findCString(kKeyMIMEType, &mime));
930    format->setString("mime", mime);
931
932    int32_t trackType;
933    if (!strncasecmp(mime, "video/", 6)) {
934        trackType = MEDIA_TRACK_TYPE_VIDEO;
935    } else if (!strncasecmp(mime, "audio/", 6)) {
936        trackType = MEDIA_TRACK_TYPE_AUDIO;
937    } else if (!strcasecmp(mime, MEDIA_MIMETYPE_TEXT_3GPP)) {
938        trackType = MEDIA_TRACK_TYPE_TIMEDTEXT;
939    } else {
940        trackType = MEDIA_TRACK_TYPE_UNKNOWN;
941    }
942    format->setInt32("type", trackType);
943
944    const char *lang;
945    if (!meta->findCString(kKeyMediaLanguage, &lang)) {
946        lang = "und";
947    }
948    format->setString("language", lang);
949
950    if (trackType == MEDIA_TRACK_TYPE_SUBTITLE) {
951        int32_t isAutoselect = 1, isDefault = 0, isForced = 0;
952        meta->findInt32(kKeyTrackIsAutoselect, &isAutoselect);
953        meta->findInt32(kKeyTrackIsDefault, &isDefault);
954        meta->findInt32(kKeyTrackIsForced, &isForced);
955
956        format->setInt32("auto", !!isAutoselect);
957        format->setInt32("default", !!isDefault);
958        format->setInt32("forced", !!isForced);
959    }
960
961    return format;
962}
963
964ssize_t NuPlayer::GenericSource::getSelectedTrack(media_track_type type) const {
965    sp<AMessage> msg = new AMessage(kWhatGetSelectedTrack, this);
966    msg->setInt32("type", type);
967
968    sp<AMessage> response;
969    int32_t index;
970    status_t err = msg->postAndAwaitResponse(&response);
971    if (err == OK && response != NULL) {
972        CHECK(response->findInt32("index", &index));
973        return index;
974    } else {
975        return -1;
976    }
977}
978
979void NuPlayer::GenericSource::onGetSelectedTrack(const sp<AMessage>& msg) const {
980    int32_t tmpType;
981    CHECK(msg->findInt32("type", &tmpType));
982    media_track_type type = (media_track_type)tmpType;
983
984    sp<AMessage> response = new AMessage;
985    ssize_t index = doGetSelectedTrack(type);
986    response->setInt32("index", index);
987
988    sp<AReplyToken> replyID;
989    CHECK(msg->senderAwaitsResponse(&replyID));
990    response->postReply(replyID);
991}
992
993ssize_t NuPlayer::GenericSource::doGetSelectedTrack(media_track_type type) const {
994    const Track *track = NULL;
995    switch (type) {
996    case MEDIA_TRACK_TYPE_VIDEO:
997        track = &mVideoTrack;
998        break;
999    case MEDIA_TRACK_TYPE_AUDIO:
1000        track = &mAudioTrack;
1001        break;
1002    case MEDIA_TRACK_TYPE_TIMEDTEXT:
1003        track = &mTimedTextTrack;
1004        break;
1005    case MEDIA_TRACK_TYPE_SUBTITLE:
1006        track = &mSubtitleTrack;
1007        break;
1008    default:
1009        break;
1010    }
1011
1012    if (track != NULL && track->mSource != NULL) {
1013        return track->mIndex;
1014    }
1015
1016    return -1;
1017}
1018
1019status_t NuPlayer::GenericSource::selectTrack(size_t trackIndex, bool select, int64_t timeUs) {
1020    ALOGV("%s track: %zu", select ? "select" : "deselect", trackIndex);
1021    sp<AMessage> msg = new AMessage(kWhatSelectTrack, this);
1022    msg->setInt32("trackIndex", trackIndex);
1023    msg->setInt32("select", select);
1024    msg->setInt64("timeUs", timeUs);
1025
1026    sp<AMessage> response;
1027    status_t err = msg->postAndAwaitResponse(&response);
1028    if (err == OK && response != NULL) {
1029        CHECK(response->findInt32("err", &err));
1030    }
1031
1032    return err;
1033}
1034
1035void NuPlayer::GenericSource::onSelectTrack(const sp<AMessage>& msg) {
1036    int32_t trackIndex, select;
1037    int64_t timeUs;
1038    CHECK(msg->findInt32("trackIndex", &trackIndex));
1039    CHECK(msg->findInt32("select", &select));
1040    CHECK(msg->findInt64("timeUs", &timeUs));
1041
1042    sp<AMessage> response = new AMessage;
1043    status_t err = doSelectTrack(trackIndex, select, timeUs);
1044    response->setInt32("err", err);
1045
1046    sp<AReplyToken> replyID;
1047    CHECK(msg->senderAwaitsResponse(&replyID));
1048    response->postReply(replyID);
1049}
1050
1051status_t NuPlayer::GenericSource::doSelectTrack(size_t trackIndex, bool select, int64_t timeUs) {
1052    if (trackIndex >= mSources.size()) {
1053        return BAD_INDEX;
1054    }
1055
1056    if (!select) {
1057        Track* track = NULL;
1058        if (mSubtitleTrack.mSource != NULL && trackIndex == mSubtitleTrack.mIndex) {
1059            track = &mSubtitleTrack;
1060            mFetchSubtitleDataGeneration++;
1061        } else if (mTimedTextTrack.mSource != NULL && trackIndex == mTimedTextTrack.mIndex) {
1062            track = &mTimedTextTrack;
1063            mFetchTimedTextDataGeneration++;
1064        }
1065        if (track == NULL) {
1066            return INVALID_OPERATION;
1067        }
1068        track->mSource->stop();
1069        track->mSource = NULL;
1070        track->mPackets->clear();
1071        return OK;
1072    }
1073
1074    const sp<IMediaSource> source = mSources.itemAt(trackIndex);
1075    sp<MetaData> meta = source->getFormat();
1076    const char *mime;
1077    CHECK(meta->findCString(kKeyMIMEType, &mime));
1078    if (!strncasecmp(mime, "text/", 5)) {
1079        bool isSubtitle = strcasecmp(mime, MEDIA_MIMETYPE_TEXT_3GPP);
1080        Track *track = isSubtitle ? &mSubtitleTrack : &mTimedTextTrack;
1081        if (track->mSource != NULL && track->mIndex == trackIndex) {
1082            return OK;
1083        }
1084        track->mIndex = trackIndex;
1085        if (track->mSource != NULL) {
1086            track->mSource->stop();
1087        }
1088        track->mSource = mSources.itemAt(trackIndex);
1089        track->mSource->start();
1090        if (track->mPackets == NULL) {
1091            track->mPackets = new AnotherPacketSource(track->mSource->getFormat());
1092        } else {
1093            track->mPackets->clear();
1094            track->mPackets->setFormat(track->mSource->getFormat());
1095
1096        }
1097
1098        if (isSubtitle) {
1099            mFetchSubtitleDataGeneration++;
1100        } else {
1101            mFetchTimedTextDataGeneration++;
1102        }
1103
1104        status_t eosResult; // ignored
1105        if (mSubtitleTrack.mSource != NULL
1106                && !mSubtitleTrack.mPackets->hasBufferAvailable(&eosResult)) {
1107            sp<AMessage> msg = new AMessage(kWhatFetchSubtitleData, this);
1108            msg->setInt64("timeUs", timeUs);
1109            msg->setInt32("generation", mFetchSubtitleDataGeneration);
1110            msg->post();
1111        }
1112
1113        sp<AMessage> msg2 = new AMessage(kWhatSendGlobalTimedTextData, this);
1114        msg2->setInt32("generation", mFetchTimedTextDataGeneration);
1115        msg2->post();
1116
1117        if (mTimedTextTrack.mSource != NULL
1118                && !mTimedTextTrack.mPackets->hasBufferAvailable(&eosResult)) {
1119            sp<AMessage> msg = new AMessage(kWhatFetchTimedTextData, this);
1120            msg->setInt64("timeUs", timeUs);
1121            msg->setInt32("generation", mFetchTimedTextDataGeneration);
1122            msg->post();
1123        }
1124
1125        return OK;
1126    } else if (!strncasecmp(mime, "audio/", 6) || !strncasecmp(mime, "video/", 6)) {
1127        bool audio = !strncasecmp(mime, "audio/", 6);
1128        Track *track = audio ? &mAudioTrack : &mVideoTrack;
1129        if (track->mSource != NULL && track->mIndex == trackIndex) {
1130            return OK;
1131        }
1132
1133        sp<AMessage> msg = new AMessage(kWhatChangeAVSource, this);
1134        msg->setInt32("trackIndex", trackIndex);
1135        msg->post();
1136        return OK;
1137    }
1138
1139    return INVALID_OPERATION;
1140}
1141
1142status_t NuPlayer::GenericSource::seekTo(int64_t seekTimeUs, MediaPlayerSeekMode mode) {
1143    sp<AMessage> msg = new AMessage(kWhatSeek, this);
1144    msg->setInt64("seekTimeUs", seekTimeUs);
1145    msg->setInt32("mode", mode);
1146
1147    sp<AMessage> response;
1148    status_t err = msg->postAndAwaitResponse(&response);
1149    if (err == OK && response != NULL) {
1150        CHECK(response->findInt32("err", &err));
1151    }
1152
1153    return err;
1154}
1155
1156void NuPlayer::GenericSource::onSeek(const sp<AMessage>& msg) {
1157    int64_t seekTimeUs;
1158    int32_t mode;
1159    CHECK(msg->findInt64("seekTimeUs", &seekTimeUs));
1160    CHECK(msg->findInt32("mode", &mode));
1161
1162    sp<AMessage> response = new AMessage;
1163    status_t err = doSeek(seekTimeUs, (MediaPlayerSeekMode)mode);
1164    response->setInt32("err", err);
1165
1166    sp<AReplyToken> replyID;
1167    CHECK(msg->senderAwaitsResponse(&replyID));
1168    response->postReply(replyID);
1169}
1170
1171status_t NuPlayer::GenericSource::doSeek(int64_t seekTimeUs, MediaPlayerSeekMode mode) {
1172    mBufferingMonitor->updateDequeuedBufferTime(-1ll);
1173
1174    // If the Widevine source is stopped, do not attempt to read any
1175    // more buffers.
1176    //
1177    // TODO: revisit after widevine is removed.  May be able to
1178    // combine mStopRead with mStarted.
1179    if (mStopRead) {
1180        return INVALID_OPERATION;
1181    }
1182    if (mVideoTrack.mSource != NULL) {
1183        int64_t actualTimeUs;
1184        readBuffer(MEDIA_TRACK_TYPE_VIDEO, seekTimeUs, mode, &actualTimeUs);
1185
1186        if (mode != MediaPlayerSeekMode::SEEK_CLOSEST) {
1187            seekTimeUs = actualTimeUs;
1188        }
1189        mVideoLastDequeueTimeUs = actualTimeUs;
1190    }
1191
1192    if (mAudioTrack.mSource != NULL) {
1193        readBuffer(MEDIA_TRACK_TYPE_AUDIO, seekTimeUs);
1194        mAudioLastDequeueTimeUs = seekTimeUs;
1195    }
1196
1197    setDrmPlaybackStatusIfNeeded(Playback::START, seekTimeUs / 1000);
1198    if (!mStarted) {
1199        setDrmPlaybackStatusIfNeeded(Playback::PAUSE, 0);
1200    }
1201
1202    // If currently buffering, post kWhatBufferingEnd first, so that
1203    // NuPlayer resumes. Otherwise, if cache hits high watermark
1204    // before new polling happens, no one will resume the playback.
1205    mBufferingMonitor->stopBufferingIfNecessary();
1206    mBufferingMonitor->restartPollBuffering();
1207
1208    return OK;
1209}
1210
1211sp<ABuffer> NuPlayer::GenericSource::mediaBufferToABuffer(
1212        MediaBuffer* mb,
1213        media_track_type trackType) {
1214    bool audio = trackType == MEDIA_TRACK_TYPE_AUDIO;
1215    size_t outLength = mb->range_length();
1216
1217    if (audio && mAudioIsVorbis) {
1218        outLength += sizeof(int32_t);
1219    }
1220
1221    sp<ABuffer> ab;
1222    if (mIsSecure && !audio) {
1223        // data is already provided in the buffer
1224        ab = new ABuffer(NULL, mb->range_length());
1225        mb->add_ref();
1226        ab->setMediaBufferBase(mb);
1227    } else {
1228        ab = new ABuffer(outLength);
1229        memcpy(ab->data(),
1230               (const uint8_t *)mb->data() + mb->range_offset(),
1231               mb->range_length());
1232    }
1233
1234    if (audio && mAudioIsVorbis) {
1235        int32_t numPageSamples;
1236        if (!mb->meta_data()->findInt32(kKeyValidSamples, &numPageSamples)) {
1237            numPageSamples = -1;
1238        }
1239
1240        uint8_t* abEnd = ab->data() + mb->range_length();
1241        memcpy(abEnd, &numPageSamples, sizeof(numPageSamples));
1242    }
1243
1244    sp<AMessage> meta = ab->meta();
1245
1246    int64_t timeUs;
1247    CHECK(mb->meta_data()->findInt64(kKeyTime, &timeUs));
1248    meta->setInt64("timeUs", timeUs);
1249
1250    if (trackType == MEDIA_TRACK_TYPE_VIDEO) {
1251        int32_t layerId;
1252        if (mb->meta_data()->findInt32(kKeyTemporalLayerId, &layerId)) {
1253            meta->setInt32("temporal-layer-id", layerId);
1254        }
1255    }
1256
1257    if (trackType == MEDIA_TRACK_TYPE_TIMEDTEXT) {
1258        const char *mime;
1259        CHECK(mTimedTextTrack.mSource != NULL
1260                && mTimedTextTrack.mSource->getFormat()->findCString(kKeyMIMEType, &mime));
1261        meta->setString("mime", mime);
1262    }
1263
1264    int64_t durationUs;
1265    if (mb->meta_data()->findInt64(kKeyDuration, &durationUs)) {
1266        meta->setInt64("durationUs", durationUs);
1267    }
1268
1269    if (trackType == MEDIA_TRACK_TYPE_SUBTITLE) {
1270        meta->setInt32("trackIndex", mSubtitleTrack.mIndex);
1271    }
1272
1273    uint32_t dataType; // unused
1274    const void *seiData;
1275    size_t seiLength;
1276    if (mb->meta_data()->findData(kKeySEI, &dataType, &seiData, &seiLength)) {
1277        sp<ABuffer> sei = ABuffer::CreateAsCopy(seiData, seiLength);;
1278        meta->setBuffer("sei", sei);
1279    }
1280
1281    const void *mpegUserDataPointer;
1282    size_t mpegUserDataLength;
1283    if (mb->meta_data()->findData(
1284            kKeyMpegUserData, &dataType, &mpegUserDataPointer, &mpegUserDataLength)) {
1285        sp<ABuffer> mpegUserData = ABuffer::CreateAsCopy(mpegUserDataPointer, mpegUserDataLength);
1286        meta->setBuffer("mpegUserData", mpegUserData);
1287    }
1288
1289    mb->release();
1290    mb = NULL;
1291
1292    return ab;
1293}
1294
1295void NuPlayer::GenericSource::postReadBuffer(media_track_type trackType) {
1296    Mutex::Autolock _l(mReadBufferLock);
1297
1298    if ((mPendingReadBufferTypes & (1 << trackType)) == 0) {
1299        mPendingReadBufferTypes |= (1 << trackType);
1300        sp<AMessage> msg = new AMessage(kWhatReadBuffer, this);
1301        msg->setInt32("trackType", trackType);
1302        msg->post();
1303    }
1304}
1305
1306void NuPlayer::GenericSource::onReadBuffer(const sp<AMessage>& msg) {
1307    int32_t tmpType;
1308    CHECK(msg->findInt32("trackType", &tmpType));
1309    media_track_type trackType = (media_track_type)tmpType;
1310    readBuffer(trackType);
1311    {
1312        // only protect the variable change, as readBuffer may
1313        // take considerable time.
1314        Mutex::Autolock _l(mReadBufferLock);
1315        mPendingReadBufferTypes &= ~(1 << trackType);
1316    }
1317}
1318
1319void NuPlayer::GenericSource::readBuffer(
1320        media_track_type trackType, int64_t seekTimeUs, MediaPlayerSeekMode mode,
1321        int64_t *actualTimeUs, bool formatChange) {
1322    // Do not read data if Widevine source is stopped
1323    //
1324    // TODO: revisit after widevine is removed.  May be able to
1325    // combine mStopRead with mStarted.
1326    if (mStopRead) {
1327        return;
1328    }
1329    Track *track;
1330    size_t maxBuffers = 1;
1331    switch (trackType) {
1332        case MEDIA_TRACK_TYPE_VIDEO:
1333            track = &mVideoTrack;
1334            maxBuffers = 8;  // too large of a number may influence seeks
1335            break;
1336        case MEDIA_TRACK_TYPE_AUDIO:
1337            track = &mAudioTrack;
1338            maxBuffers = 64;
1339            break;
1340        case MEDIA_TRACK_TYPE_SUBTITLE:
1341            track = &mSubtitleTrack;
1342            break;
1343        case MEDIA_TRACK_TYPE_TIMEDTEXT:
1344            track = &mTimedTextTrack;
1345            break;
1346        default:
1347            TRESPASS();
1348    }
1349
1350    if (track->mSource == NULL) {
1351        return;
1352    }
1353
1354    if (actualTimeUs) {
1355        *actualTimeUs = seekTimeUs;
1356    }
1357
1358    MediaSource::ReadOptions options;
1359
1360    bool seeking = false;
1361    if (seekTimeUs >= 0) {
1362        options.setSeekTo(seekTimeUs, mode);
1363        seeking = true;
1364    }
1365
1366    const bool couldReadMultiple = (track->mSource->supportReadMultiple());
1367
1368    if (couldReadMultiple) {
1369        options.setNonBlocking();
1370    }
1371
1372    for (size_t numBuffers = 0; numBuffers < maxBuffers; ) {
1373        Vector<MediaBuffer *> mediaBuffers;
1374        status_t err = NO_ERROR;
1375
1376        if (couldReadMultiple) {
1377            err = track->mSource->readMultiple(
1378                    &mediaBuffers, maxBuffers - numBuffers, &options);
1379        } else {
1380            MediaBuffer *mbuf = NULL;
1381            err = track->mSource->read(&mbuf, &options);
1382            if (err == OK && mbuf != NULL) {
1383                mediaBuffers.push_back(mbuf);
1384            }
1385        }
1386
1387        options.clearNonPersistent();
1388
1389        size_t id = 0;
1390        size_t count = mediaBuffers.size();
1391        for (; id < count; ++id) {
1392            int64_t timeUs;
1393            MediaBuffer *mbuf = mediaBuffers[id];
1394            if (!mbuf->meta_data()->findInt64(kKeyTime, &timeUs)) {
1395                mbuf->meta_data()->dumpToLog();
1396                track->mPackets->signalEOS(ERROR_MALFORMED);
1397                break;
1398            }
1399            if (trackType == MEDIA_TRACK_TYPE_AUDIO) {
1400                mAudioTimeUs = timeUs;
1401                mBufferingMonitor->updateQueuedTime(true /* isAudio */, timeUs);
1402            } else if (trackType == MEDIA_TRACK_TYPE_VIDEO) {
1403                mVideoTimeUs = timeUs;
1404                mBufferingMonitor->updateQueuedTime(false /* isAudio */, timeUs);
1405            }
1406
1407            queueDiscontinuityIfNeeded(seeking, formatChange, trackType, track);
1408
1409            sp<ABuffer> buffer = mediaBufferToABuffer(mbuf, trackType);
1410            if (numBuffers == 0 && actualTimeUs != nullptr) {
1411                *actualTimeUs = timeUs;
1412            }
1413            if (seeking && buffer != nullptr) {
1414                sp<AMessage> meta = buffer->meta();
1415                if (meta != nullptr && mode == MediaPlayerSeekMode::SEEK_CLOSEST
1416                        && seekTimeUs > timeUs) {
1417                    sp<AMessage> extra = new AMessage;
1418                    extra->setInt64("resume-at-mediaTimeUs", seekTimeUs);
1419                    meta->setMessage("extra", extra);
1420                }
1421            }
1422
1423            track->mPackets->queueAccessUnit(buffer);
1424            formatChange = false;
1425            seeking = false;
1426            ++numBuffers;
1427        }
1428        if (id < count) {
1429            // Error, some mediaBuffer doesn't have kKeyTime.
1430            for (; id < count; ++id) {
1431                mediaBuffers[id]->release();
1432            }
1433            break;
1434        }
1435
1436        if (err == WOULD_BLOCK) {
1437            break;
1438        } else if (err == INFO_FORMAT_CHANGED) {
1439#if 0
1440            track->mPackets->queueDiscontinuity(
1441                    ATSParser::DISCONTINUITY_FORMATCHANGE,
1442                    NULL,
1443                    false /* discard */);
1444#endif
1445        } else if (err != OK) {
1446            queueDiscontinuityIfNeeded(seeking, formatChange, trackType, track);
1447            track->mPackets->signalEOS(err);
1448            break;
1449        }
1450    }
1451}
1452
1453void NuPlayer::GenericSource::queueDiscontinuityIfNeeded(
1454        bool seeking, bool formatChange, media_track_type trackType, Track *track) {
1455    // formatChange && seeking: track whose source is changed during selection
1456    // formatChange && !seeking: track whose source is not changed during selection
1457    // !formatChange: normal seek
1458    if ((seeking || formatChange)
1459            && (trackType == MEDIA_TRACK_TYPE_AUDIO
1460            || trackType == MEDIA_TRACK_TYPE_VIDEO)) {
1461        ATSParser::DiscontinuityType type = (formatChange && seeking)
1462                ? ATSParser::DISCONTINUITY_FORMATCHANGE
1463                : ATSParser::DISCONTINUITY_NONE;
1464        track->mPackets->queueDiscontinuity(type, NULL /* extra */, true /* discard */);
1465    }
1466}
1467
1468NuPlayer::GenericSource::BufferingMonitor::BufferingMonitor(const sp<AMessage> &notify)
1469    : mNotify(notify),
1470      mDurationUs(-1ll),
1471      mBitrate(-1ll),
1472      mIsStreaming(false),
1473      mAudioTimeUs(0),
1474      mVideoTimeUs(0),
1475      mPollBufferingGeneration(0),
1476      mPrepareBuffering(false),
1477      mBuffering(false),
1478      mPrevBufferPercentage(-1),
1479      mOffloadAudio(false),
1480      mFirstDequeuedBufferRealUs(-1ll),
1481      mFirstDequeuedBufferMediaUs(-1ll),
1482      mlastDequeuedBufferMediaUs(-1ll) {
1483      getDefaultBufferingSettings(&mSettings);
1484}
1485
1486NuPlayer::GenericSource::BufferingMonitor::~BufferingMonitor() {
1487}
1488
1489void NuPlayer::GenericSource::BufferingMonitor::getDefaultBufferingSettings(
1490        BufferingSettings *buffering /* nonnull */) {
1491    buffering->mInitialBufferingMode = BUFFERING_MODE_TIME_ONLY;
1492    buffering->mRebufferingMode = BUFFERING_MODE_TIME_THEN_SIZE;
1493    buffering->mInitialWatermarkMs = kHighWaterMarkMs;
1494    buffering->mRebufferingWatermarkLowMs = kLowWaterMarkMs;
1495    buffering->mRebufferingWatermarkHighMs = kHighWaterMarkRebufferMs;
1496    buffering->mRebufferingWatermarkLowKB = kLowWaterMarkKB;
1497    buffering->mRebufferingWatermarkHighKB = kHighWaterMarkKB;
1498
1499    ALOGV("BufferingMonitor::getDefaultBufferingSettings{%s}",
1500            buffering->toString().string());
1501}
1502
1503status_t NuPlayer::GenericSource::BufferingMonitor::setBufferingSettings(
1504        const BufferingSettings &buffering) {
1505    ALOGV("BufferingMonitor::setBufferingSettings{%s}",
1506            buffering.toString().string());
1507
1508    Mutex::Autolock _l(mLock);
1509    if (buffering.IsSizeBasedBufferingMode(buffering.mInitialBufferingMode)
1510            || (buffering.IsTimeBasedBufferingMode(buffering.mRebufferingMode)
1511                && buffering.mRebufferingWatermarkLowMs > buffering.mRebufferingWatermarkHighMs)
1512            || (buffering.IsSizeBasedBufferingMode(buffering.mRebufferingMode)
1513                && buffering.mRebufferingWatermarkLowKB > buffering.mRebufferingWatermarkHighKB)) {
1514        return BAD_VALUE;
1515    }
1516    mSettings = buffering;
1517    if (mSettings.mInitialBufferingMode == BUFFERING_MODE_NONE) {
1518        mSettings.mInitialWatermarkMs = BufferingSettings::kNoWatermark;
1519    }
1520    if (!mSettings.IsTimeBasedBufferingMode(mSettings.mRebufferingMode)) {
1521        mSettings.mRebufferingWatermarkLowMs = BufferingSettings::kNoWatermark;
1522        mSettings.mRebufferingWatermarkHighMs = INT32_MAX;
1523    }
1524    if (!mSettings.IsSizeBasedBufferingMode(mSettings.mRebufferingMode)) {
1525        mSettings.mRebufferingWatermarkLowKB = BufferingSettings::kNoWatermark;
1526        mSettings.mRebufferingWatermarkHighKB = INT32_MAX;
1527    }
1528    return OK;
1529}
1530
1531void NuPlayer::GenericSource::BufferingMonitor::prepare(
1532        const sp<NuCachedSource2> &cachedSource,
1533        int64_t durationUs,
1534        int64_t bitrate,
1535        bool isStreaming) {
1536    Mutex::Autolock _l(mLock);
1537    prepare_l(cachedSource, durationUs, bitrate, isStreaming);
1538}
1539
1540void NuPlayer::GenericSource::BufferingMonitor::stop() {
1541    Mutex::Autolock _l(mLock);
1542    prepare_l(NULL /* cachedSource */, -1 /* durationUs */,
1543            -1 /* bitrate */, false /* isStreaming */);
1544}
1545
1546void NuPlayer::GenericSource::BufferingMonitor::cancelPollBuffering() {
1547    Mutex::Autolock _l(mLock);
1548    cancelPollBuffering_l();
1549}
1550
1551void NuPlayer::GenericSource::BufferingMonitor::restartPollBuffering() {
1552    Mutex::Autolock _l(mLock);
1553    if (mIsStreaming) {
1554        cancelPollBuffering_l();
1555        onPollBuffering_l();
1556    }
1557}
1558
1559void NuPlayer::GenericSource::BufferingMonitor::stopBufferingIfNecessary() {
1560    Mutex::Autolock _l(mLock);
1561    stopBufferingIfNecessary_l();
1562}
1563
1564void NuPlayer::GenericSource::BufferingMonitor::ensureCacheIsFetching() {
1565    Mutex::Autolock _l(mLock);
1566    ensureCacheIsFetching_l();
1567}
1568
1569void NuPlayer::GenericSource::BufferingMonitor::updateQueuedTime(bool isAudio, int64_t timeUs) {
1570    Mutex::Autolock _l(mLock);
1571    if (isAudio) {
1572        mAudioTimeUs = timeUs;
1573    } else {
1574        mVideoTimeUs = timeUs;
1575    }
1576}
1577
1578void NuPlayer::GenericSource::BufferingMonitor::setOffloadAudio(bool offload) {
1579    Mutex::Autolock _l(mLock);
1580    mOffloadAudio = offload;
1581}
1582
1583void NuPlayer::GenericSource::BufferingMonitor::updateDequeuedBufferTime(int64_t mediaUs) {
1584    Mutex::Autolock _l(mLock);
1585    if (mediaUs < 0) {
1586        mFirstDequeuedBufferRealUs = -1ll;
1587        mFirstDequeuedBufferMediaUs = -1ll;
1588    } else if (mFirstDequeuedBufferRealUs < 0) {
1589        mFirstDequeuedBufferRealUs = ALooper::GetNowUs();
1590        mFirstDequeuedBufferMediaUs = mediaUs;
1591    }
1592    mlastDequeuedBufferMediaUs = mediaUs;
1593}
1594
1595void NuPlayer::GenericSource::BufferingMonitor::prepare_l(
1596        const sp<NuCachedSource2> &cachedSource,
1597        int64_t durationUs,
1598        int64_t bitrate,
1599        bool isStreaming) {
1600
1601    mCachedSource = cachedSource;
1602    mDurationUs = durationUs;
1603    mBitrate = bitrate;
1604    mIsStreaming = isStreaming;
1605    mAudioTimeUs = 0;
1606    mVideoTimeUs = 0;
1607    mPrepareBuffering = (cachedSource != NULL);
1608    cancelPollBuffering_l();
1609    mOffloadAudio = false;
1610    mFirstDequeuedBufferRealUs = -1ll;
1611    mFirstDequeuedBufferMediaUs = -1ll;
1612    mlastDequeuedBufferMediaUs = -1ll;
1613}
1614
1615void NuPlayer::GenericSource::BufferingMonitor::cancelPollBuffering_l() {
1616    mBuffering = false;
1617    ++mPollBufferingGeneration;
1618    mPrevBufferPercentage = -1;
1619}
1620
1621void NuPlayer::GenericSource::BufferingMonitor::notifyBufferingUpdate_l(int32_t percentage) {
1622    // Buffering percent could go backward as it's estimated from remaining
1623    // data and last access time. This could cause the buffering position
1624    // drawn on media control to jitter slightly. Remember previously reported
1625    // percentage and don't allow it to go backward.
1626    if (percentage < mPrevBufferPercentage) {
1627        percentage = mPrevBufferPercentage;
1628    } else if (percentage > 100) {
1629        percentage = 100;
1630    }
1631
1632    mPrevBufferPercentage = percentage;
1633
1634    ALOGV("notifyBufferingUpdate_l: buffering %d%%", percentage);
1635
1636    sp<AMessage> msg = mNotify->dup();
1637    msg->setInt32("what", kWhatBufferingUpdate);
1638    msg->setInt32("percentage", percentage);
1639    msg->post();
1640}
1641
1642void NuPlayer::GenericSource::BufferingMonitor::startBufferingIfNecessary_l() {
1643    if (mPrepareBuffering) {
1644        return;
1645    }
1646
1647    if (!mBuffering) {
1648        ALOGD("startBufferingIfNecessary_l");
1649
1650        mBuffering = true;
1651
1652        ensureCacheIsFetching_l();
1653        sendCacheStats_l();
1654
1655        sp<AMessage> notify = mNotify->dup();
1656        notify->setInt32("what", kWhatPauseOnBufferingStart);
1657        notify->post();
1658    }
1659}
1660
1661void NuPlayer::GenericSource::BufferingMonitor::stopBufferingIfNecessary_l() {
1662    if (mPrepareBuffering) {
1663        ALOGD("stopBufferingIfNecessary_l, mBuffering=%d", mBuffering);
1664
1665        mPrepareBuffering = false;
1666
1667        sp<AMessage> notify = mNotify->dup();
1668        notify->setInt32("what", kWhatPrepared);
1669        notify->setInt32("err", OK);
1670        notify->post();
1671
1672        return;
1673    }
1674
1675    if (mBuffering) {
1676        ALOGD("stopBufferingIfNecessary_l");
1677        mBuffering = false;
1678
1679        sendCacheStats_l();
1680
1681        sp<AMessage> notify = mNotify->dup();
1682        notify->setInt32("what", kWhatResumeOnBufferingEnd);
1683        notify->post();
1684    }
1685}
1686
1687void NuPlayer::GenericSource::BufferingMonitor::sendCacheStats_l() {
1688    int32_t kbps = 0;
1689    status_t err = UNKNOWN_ERROR;
1690
1691    if (mCachedSource != NULL) {
1692        err = mCachedSource->getEstimatedBandwidthKbps(&kbps);
1693    }
1694
1695    if (err == OK) {
1696        sp<AMessage> notify = mNotify->dup();
1697        notify->setInt32("what", kWhatCacheStats);
1698        notify->setInt32("bandwidth", kbps);
1699        notify->post();
1700    }
1701}
1702
1703void NuPlayer::GenericSource::BufferingMonitor::ensureCacheIsFetching_l() {
1704    if (mCachedSource != NULL) {
1705        mCachedSource->resumeFetchingIfNecessary();
1706    }
1707}
1708
1709void NuPlayer::GenericSource::BufferingMonitor::schedulePollBuffering_l() {
1710    sp<AMessage> msg = new AMessage(kWhatPollBuffering, this);
1711    msg->setInt32("generation", mPollBufferingGeneration);
1712    // Enquires buffering status every second.
1713    msg->post(1000000ll);
1714}
1715
1716int64_t NuPlayer::GenericSource::BufferingMonitor::getLastReadPosition_l() {
1717    if (mAudioTimeUs > 0) {
1718        return mAudioTimeUs;
1719    } else if (mVideoTimeUs > 0) {
1720        return mVideoTimeUs;
1721    } else {
1722        return 0;
1723    }
1724}
1725
1726void NuPlayer::GenericSource::BufferingMonitor::onPollBuffering_l() {
1727    status_t finalStatus = UNKNOWN_ERROR;
1728    int64_t cachedDurationUs = -1ll;
1729    ssize_t cachedDataRemaining = -1;
1730
1731    if (mCachedSource != NULL) {
1732        cachedDataRemaining =
1733                mCachedSource->approxDataRemaining(&finalStatus);
1734
1735        if (finalStatus == OK) {
1736            off64_t size;
1737            int64_t bitrate = 0ll;
1738            if (mDurationUs > 0 && mCachedSource->getSize(&size) == OK) {
1739                // |bitrate| uses bits/second unit, while size is number of bytes.
1740                bitrate = size * 8000000ll / mDurationUs;
1741            } else if (mBitrate > 0) {
1742                bitrate = mBitrate;
1743            }
1744            if (bitrate > 0) {
1745                cachedDurationUs = cachedDataRemaining * 8000000ll / bitrate;
1746            }
1747        }
1748    }
1749
1750    if (finalStatus != OK) {
1751        ALOGV("onPollBuffering_l: EOS (finalStatus = %d)", finalStatus);
1752
1753        if (finalStatus == ERROR_END_OF_STREAM) {
1754            notifyBufferingUpdate_l(100);
1755        }
1756
1757        stopBufferingIfNecessary_l();
1758        return;
1759    }
1760
1761    if (cachedDurationUs >= 0ll) {
1762        if (mDurationUs > 0ll) {
1763            int64_t cachedPosUs = getLastReadPosition_l() + cachedDurationUs;
1764            int percentage = 100.0 * cachedPosUs / mDurationUs;
1765            if (percentage > 100) {
1766                percentage = 100;
1767            }
1768
1769            notifyBufferingUpdate_l(percentage);
1770        }
1771
1772        ALOGV("onPollBuffering_l: cachedDurationUs %.1f sec", cachedDurationUs / 1000000.0f);
1773
1774        if (mPrepareBuffering) {
1775            if (cachedDurationUs > mSettings.mInitialWatermarkMs * 1000) {
1776                stopBufferingIfNecessary_l();
1777            }
1778        } else if (mSettings.IsTimeBasedBufferingMode(mSettings.mRebufferingMode)) {
1779            if (cachedDurationUs < mSettings.mRebufferingWatermarkLowMs * 1000) {
1780                // Take into account the data cached in downstream components to try to avoid
1781                // unnecessary pause.
1782                if (mOffloadAudio && mFirstDequeuedBufferRealUs >= 0) {
1783                    int64_t downStreamCacheUs =
1784                        mlastDequeuedBufferMediaUs - mFirstDequeuedBufferMediaUs
1785                            - (ALooper::GetNowUs() - mFirstDequeuedBufferRealUs);
1786                    if (downStreamCacheUs > 0) {
1787                        cachedDurationUs += downStreamCacheUs;
1788                    }
1789                }
1790
1791                if (cachedDurationUs < mSettings.mRebufferingWatermarkLowMs * 1000) {
1792                    startBufferingIfNecessary_l();
1793                }
1794            } else if (cachedDurationUs > mSettings.mRebufferingWatermarkHighMs * 1000) {
1795                stopBufferingIfNecessary_l();
1796            }
1797        }
1798    } else if (cachedDataRemaining >= 0
1799            && mSettings.IsSizeBasedBufferingMode(mSettings.mRebufferingMode)) {
1800        ALOGV("onPollBuffering_l: cachedDataRemaining %zd bytes",
1801                cachedDataRemaining);
1802
1803        if (cachedDataRemaining < (mSettings.mRebufferingWatermarkLowKB << 10)) {
1804            startBufferingIfNecessary_l();
1805        } else if (cachedDataRemaining > (mSettings.mRebufferingWatermarkHighKB << 10)) {
1806            stopBufferingIfNecessary_l();
1807        }
1808    }
1809
1810    schedulePollBuffering_l();
1811}
1812
1813void NuPlayer::GenericSource::BufferingMonitor::onMessageReceived(const sp<AMessage> &msg) {
1814    switch (msg->what()) {
1815      case kWhatPollBuffering:
1816      {
1817          int32_t generation;
1818          CHECK(msg->findInt32("generation", &generation));
1819          Mutex::Autolock _l(mLock);
1820          if (generation == mPollBufferingGeneration) {
1821              onPollBuffering_l();
1822          }
1823          break;
1824      }
1825      default:
1826          TRESPASS();
1827          break;
1828    }
1829}
1830
1831}  // namespace android
1832