GenericSource.cpp revision 92d57f926eb39d72e8fd8f3b3c9e40d25f77ad47 
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/DRMExtractor.h"
37#include "../../libstagefright/include/NuCachedSource2.h"
38#include "../../libstagefright/include/HTTPBase.h"
39
40namespace android {
41
42static int64_t kLowWaterMarkUs = 2000000ll;  // 2secs
43static int64_t kHighWaterMarkUs = 5000000ll;  // 5secs
44static int64_t kHighWaterMarkRebufferUs = 15000000ll;  // 15secs
45static const ssize_t kLowWaterMarkBytes = 40000;
46static const ssize_t kHighWaterMarkBytes = 200000;
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    if (extractor->getDrmFlag()) {
150        checkDrmStatus(mDataSource);
151    }
152
153    mFileMeta = extractor->getMetaData();
154    if (mFileMeta != NULL) {
155        int64_t duration;
156        if (mFileMeta->findInt64(kKeyDuration, &duration)) {
157            mDurationUs = duration;
158        }
159    }
160
161    int32_t totalBitrate = 0;
162
163    size_t numtracks = extractor->countTracks();
164    if (numtracks == 0) {
165        return UNKNOWN_ERROR;
166    }
167
168    for (size_t i = 0; i < numtracks; ++i) {
169        sp<IMediaSource> track = extractor->getTrack(i);
170        if (track == NULL) {
171            continue;
172        }
173
174        sp<MetaData> meta = extractor->getTrackMetaData(i);
175        if (meta == NULL) {
176            ALOGE("no metadata for track %zu", i);
177            return UNKNOWN_ERROR;
178        }
179
180        const char *mime;
181        CHECK(meta->findCString(kKeyMIMEType, &mime));
182
183        // Do the string compare immediately with "mime",
184        // we can't assume "mime" would stay valid after another
185        // extractor operation, some extractors might modify meta
186        // during getTrack() and make it invalid.
187        if (!strncasecmp(mime, "audio/", 6)) {
188            if (mAudioTrack.mSource == NULL) {
189                mAudioTrack.mIndex = i;
190                mAudioTrack.mSource = track;
191                mAudioTrack.mPackets =
192                    new AnotherPacketSource(mAudioTrack.mSource->getFormat());
193
194                if (!strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_VORBIS)) {
195                    mAudioIsVorbis = true;
196                } else {
197                    mAudioIsVorbis = false;
198                }
199            }
200        } else if (!strncasecmp(mime, "video/", 6)) {
201            if (mVideoTrack.mSource == NULL) {
202                mVideoTrack.mIndex = i;
203                mVideoTrack.mSource = track;
204                mVideoTrack.mPackets =
205                    new AnotherPacketSource(mVideoTrack.mSource->getFormat());
206
207                // check if the source requires secure buffers
208                int32_t secure;
209                if (meta->findInt32(kKeyRequiresSecureBuffers, &secure)
210                        && secure) {
211                    mIsSecure = true;
212                    if (mUIDValid) {
213                        extractor->setUID(mUID);
214                    }
215                }
216            }
217        }
218
219        mSources.push(track);
220        int64_t durationUs;
221        if (meta->findInt64(kKeyDuration, &durationUs)) {
222            if (durationUs > mDurationUs) {
223                mDurationUs = durationUs;
224            }
225        }
226
227        int32_t bitrate;
228        if (totalBitrate >= 0 && meta->findInt32(kKeyBitRate, &bitrate)) {
229            totalBitrate += bitrate;
230        } else {
231            totalBitrate = -1;
232        }
233    }
234
235    if (mSources.size() == 0) {
236        ALOGE("b/23705695");
237        return UNKNOWN_ERROR;
238    }
239
240    mBitrate = totalBitrate;
241
242    return OK;
243}
244
245status_t NuPlayer::GenericSource::startSources() {
246    // Start the selected A/V tracks now before we start buffering.
247    // Widevine sources might re-initialize crypto when starting, if we delay
248    // this to start(), all data buffered during prepare would be wasted.
249    // (We don't actually start reading until start().)
250    //
251    // TODO: this logic may no longer be relevant after the removal of widevine
252    // support
253    if (mAudioTrack.mSource != NULL && mAudioTrack.mSource->start() != OK) {
254        ALOGE("failed to start audio track!");
255        return UNKNOWN_ERROR;
256    }
257
258    if (mVideoTrack.mSource != NULL && mVideoTrack.mSource->start() != OK) {
259        ALOGE("failed to start video track!");
260        return UNKNOWN_ERROR;
261    }
262
263    return OK;
264}
265
266void NuPlayer::GenericSource::checkDrmStatus(const sp<DataSource>& dataSource) {
267    dataSource->getDrmInfo(mDecryptHandle, &mDrmManagerClient);
268    if (mDecryptHandle != NULL) {
269        CHECK(mDrmManagerClient);
270        if (RightsStatus::RIGHTS_VALID != mDecryptHandle->status) {
271            sp<AMessage> msg = dupNotify();
272            msg->setInt32("what", kWhatDrmNoLicense);
273            msg->post();
274        }
275    }
276}
277
278int64_t NuPlayer::GenericSource::getLastReadPosition() {
279    if (mAudioTrack.mSource != NULL) {
280        return mAudioTimeUs;
281    } else if (mVideoTrack.mSource != NULL) {
282        return mVideoTimeUs;
283    } else {
284        return 0;
285    }
286}
287
288status_t NuPlayer::GenericSource::setBuffers(
289        bool audio, Vector<MediaBuffer *> &buffers) {
290    if (mIsSecure && !audio && mVideoTrack.mSource != NULL) {
291        return mVideoTrack.mSource->setBuffers(buffers);
292    }
293    return INVALID_OPERATION;
294}
295
296bool NuPlayer::GenericSource::isStreaming() const {
297    return mIsStreaming;
298}
299
300void NuPlayer::GenericSource::setOffloadAudio(bool offload) {
301    mBufferingMonitor->setOffloadAudio(offload);
302}
303
304NuPlayer::GenericSource::~GenericSource() {
305    if (mLooper != NULL) {
306        mLooper->unregisterHandler(id());
307        mLooper->stop();
308    }
309    resetDataSource();
310}
311
312void NuPlayer::GenericSource::prepareAsync() {
313    if (mLooper == NULL) {
314        mLooper = new ALooper;
315        mLooper->setName("generic");
316        mLooper->start();
317
318        mLooper->registerHandler(this);
319    }
320
321    sp<AMessage> msg = new AMessage(kWhatPrepareAsync, this);
322    msg->post();
323}
324
325void NuPlayer::GenericSource::onPrepareAsync() {
326    // delayed data source creation
327    if (mDataSource == NULL) {
328        // set to false first, if the extractor
329        // comes back as secure, set it to true then.
330        mIsSecure = false;
331
332        if (!mUri.empty()) {
333            const char* uri = mUri.c_str();
334            String8 contentType;
335
336            if (!strncasecmp("http://", uri, 7) || !strncasecmp("https://", uri, 8)) {
337                mHttpSource = DataSource::CreateMediaHTTP(mHTTPService);
338                if (mHttpSource == NULL) {
339                    ALOGE("Failed to create http source!");
340                    notifyPreparedAndCleanup(UNKNOWN_ERROR);
341                    return;
342                }
343            }
344
345            mDataSource = DataSource::CreateFromURI(
346                   mHTTPService, uri, &mUriHeaders, &contentType,
347                   static_cast<HTTPBase *>(mHttpSource.get()));
348        } else {
349            mDataSource = new FileSource(mFd, mOffset, mLength);
350            mFd = -1;
351        }
352
353        if (mDataSource == NULL) {
354            ALOGE("Failed to create data source!");
355            notifyPreparedAndCleanup(UNKNOWN_ERROR);
356            return;
357        }
358    }
359
360    if (mDataSource->flags() & DataSource::kIsCachingDataSource) {
361        mCachedSource = static_cast<NuCachedSource2 *>(mDataSource.get());
362    }
363
364    // For cached streaming cases, we need to wait for enough
365    // buffering before reporting prepared.
366    mIsStreaming = (mCachedSource != NULL);
367
368    // init extractor from data source
369    status_t err = initFromDataSource();
370
371    if (err != OK) {
372        ALOGE("Failed to init from data source!");
373        notifyPreparedAndCleanup(err);
374        return;
375    }
376
377    if (mVideoTrack.mSource != NULL) {
378        sp<MetaData> meta = doGetFormatMeta(false /* audio */);
379        sp<AMessage> msg = new AMessage;
380        err = convertMetaDataToMessage(meta, &msg);
381        if(err != OK) {
382            notifyPreparedAndCleanup(err);
383            return;
384        }
385        notifyVideoSizeChanged(msg);
386    }
387
388    notifyFlagsChanged(
389            (mIsSecure ? FLAG_SECURE : 0)
390            | (mDecryptHandle != NULL ? FLAG_PROTECTED : 0)
391            | FLAG_CAN_PAUSE
392            | FLAG_CAN_SEEK_BACKWARD
393            | FLAG_CAN_SEEK_FORWARD
394            | FLAG_CAN_SEEK);
395
396    if (mIsSecure) {
397        // secure decoders must be instantiated before starting widevine source
398        //
399        // TODO: mIsSecure and FLAG_SECURE may be obsolete, revisit after
400        // removing widevine
401        sp<AMessage> reply = new AMessage(kWhatSecureDecodersInstantiated, this);
402        notifyInstantiateSecureDecoders(reply);
403    } else {
404        finishPrepareAsync();
405    }
406}
407
408void NuPlayer::GenericSource::onSecureDecodersInstantiated(status_t err) {
409    if (err != OK) {
410        ALOGE("Failed to instantiate secure decoders!");
411        notifyPreparedAndCleanup(err);
412        return;
413    }
414    finishPrepareAsync();
415}
416
417void NuPlayer::GenericSource::finishPrepareAsync() {
418    status_t err = startSources();
419    if (err != OK) {
420        ALOGE("Failed to init start data source!");
421        notifyPreparedAndCleanup(err);
422        return;
423    }
424
425    if (mIsStreaming) {
426        if (mBufferingMonitorLooper == NULL) {
427            mBufferingMonitor->prepare(mCachedSource, mDurationUs, mBitrate,
428                    mIsStreaming);
429
430            mBufferingMonitorLooper = new ALooper;
431            mBufferingMonitorLooper->setName("GSBMonitor");
432            mBufferingMonitorLooper->start();
433            mBufferingMonitorLooper->registerHandler(mBufferingMonitor);
434        }
435
436        mBufferingMonitor->ensureCacheIsFetching();
437        mBufferingMonitor->restartPollBuffering();
438    } else {
439        notifyPrepared();
440    }
441}
442
443void NuPlayer::GenericSource::notifyPreparedAndCleanup(status_t err) {
444    if (err != OK) {
445        {
446            sp<DataSource> dataSource = mDataSource;
447            sp<NuCachedSource2> cachedSource = mCachedSource;
448            sp<DataSource> httpSource = mHttpSource;
449            {
450                Mutex::Autolock _l(mDisconnectLock);
451                mDataSource.clear();
452                mDecryptHandle = NULL;
453                mDrmManagerClient = NULL;
454                mCachedSource.clear();
455                mHttpSource.clear();
456            }
457        }
458        mBitrate = -1;
459
460        mBufferingMonitor->cancelPollBuffering();
461    }
462    notifyPrepared(err);
463}
464
465void NuPlayer::GenericSource::start() {
466    ALOGI("start");
467
468    mStopRead = false;
469    if (mAudioTrack.mSource != NULL) {
470        postReadBuffer(MEDIA_TRACK_TYPE_AUDIO);
471    }
472
473    if (mVideoTrack.mSource != NULL) {
474        postReadBuffer(MEDIA_TRACK_TYPE_VIDEO);
475    }
476
477    setDrmPlaybackStatusIfNeeded(Playback::START, getLastReadPosition() / 1000);
478    mStarted = true;
479
480    (new AMessage(kWhatStart, this))->post();
481}
482
483void NuPlayer::GenericSource::stop() {
484    // nothing to do, just account for DRM playback status
485    setDrmPlaybackStatusIfNeeded(Playback::STOP, 0);
486    mStarted = false;
487}
488
489void NuPlayer::GenericSource::pause() {
490    // nothing to do, just account for DRM playback status
491    setDrmPlaybackStatusIfNeeded(Playback::PAUSE, 0);
492    mStarted = false;
493}
494
495void NuPlayer::GenericSource::resume() {
496    // nothing to do, just account for DRM playback status
497    setDrmPlaybackStatusIfNeeded(Playback::START, getLastReadPosition() / 1000);
498    mStarted = true;
499
500    (new AMessage(kWhatResume, this))->post();
501}
502
503void NuPlayer::GenericSource::disconnect() {
504    sp<DataSource> dataSource, httpSource;
505    {
506        Mutex::Autolock _l(mDisconnectLock);
507        dataSource = mDataSource;
508        httpSource = mHttpSource;
509    }
510
511    if (dataSource != NULL) {
512        // disconnect data source
513        if (dataSource->flags() & DataSource::kIsCachingDataSource) {
514            static_cast<NuCachedSource2 *>(dataSource.get())->disconnect();
515        }
516    } else if (httpSource != NULL) {
517        static_cast<HTTPBase *>(httpSource.get())->disconnect();
518    }
519}
520
521void NuPlayer::GenericSource::setDrmPlaybackStatusIfNeeded(int playbackStatus, int64_t position) {
522    if (mDecryptHandle != NULL) {
523        mDrmManagerClient->setPlaybackStatus(mDecryptHandle, playbackStatus, position);
524    }
525    mSubtitleTrack.mPackets = new AnotherPacketSource(NULL);
526    mTimedTextTrack.mPackets = new AnotherPacketSource(NULL);
527}
528
529status_t NuPlayer::GenericSource::feedMoreTSData() {
530    return OK;
531}
532
533void NuPlayer::GenericSource::onMessageReceived(const sp<AMessage> &msg) {
534    switch (msg->what()) {
535      case kWhatPrepareAsync:
536      {
537          onPrepareAsync();
538          break;
539      }
540      case kWhatFetchSubtitleData:
541      {
542          fetchTextData(kWhatSendSubtitleData, MEDIA_TRACK_TYPE_SUBTITLE,
543                  mFetchSubtitleDataGeneration, mSubtitleTrack.mPackets, msg);
544          break;
545      }
546
547      case kWhatFetchTimedTextData:
548      {
549          fetchTextData(kWhatSendTimedTextData, MEDIA_TRACK_TYPE_TIMEDTEXT,
550                  mFetchTimedTextDataGeneration, mTimedTextTrack.mPackets, msg);
551          break;
552      }
553
554      case kWhatSendSubtitleData:
555      {
556          sendTextData(kWhatSubtitleData, MEDIA_TRACK_TYPE_SUBTITLE,
557                  mFetchSubtitleDataGeneration, mSubtitleTrack.mPackets, msg);
558          break;
559      }
560
561      case kWhatSendGlobalTimedTextData:
562      {
563          sendGlobalTextData(kWhatTimedTextData, mFetchTimedTextDataGeneration, msg);
564          break;
565      }
566      case kWhatSendTimedTextData:
567      {
568          sendTextData(kWhatTimedTextData, MEDIA_TRACK_TYPE_TIMEDTEXT,
569                  mFetchTimedTextDataGeneration, mTimedTextTrack.mPackets, msg);
570          break;
571      }
572
573      case kWhatChangeAVSource:
574      {
575          int32_t trackIndex;
576          CHECK(msg->findInt32("trackIndex", &trackIndex));
577          const sp<IMediaSource> source = mSources.itemAt(trackIndex);
578
579          Track* track;
580          const char *mime;
581          media_track_type trackType, counterpartType;
582          sp<MetaData> meta = source->getFormat();
583          meta->findCString(kKeyMIMEType, &mime);
584          if (!strncasecmp(mime, "audio/", 6)) {
585              track = &mAudioTrack;
586              trackType = MEDIA_TRACK_TYPE_AUDIO;
587              counterpartType = MEDIA_TRACK_TYPE_VIDEO;;
588          } else {
589              CHECK(!strncasecmp(mime, "video/", 6));
590              track = &mVideoTrack;
591              trackType = MEDIA_TRACK_TYPE_VIDEO;
592              counterpartType = MEDIA_TRACK_TYPE_AUDIO;;
593          }
594
595
596          if (track->mSource != NULL) {
597              track->mSource->stop();
598          }
599          track->mSource = source;
600          track->mSource->start();
601          track->mIndex = trackIndex;
602
603          int64_t timeUs, actualTimeUs;
604          const bool formatChange = true;
605          if (trackType == MEDIA_TRACK_TYPE_AUDIO) {
606              timeUs = mAudioLastDequeueTimeUs;
607          } else {
608              timeUs = mVideoLastDequeueTimeUs;
609          }
610          readBuffer(trackType, timeUs, MediaPlayerSeekMode::SEEK_PREVIOUS_SYNC /* mode */,
611                  &actualTimeUs, formatChange);
612          readBuffer(counterpartType, -1, MediaPlayerSeekMode::SEEK_PREVIOUS_SYNC /* mode */,
613                  NULL, !formatChange);
614          ALOGV("timeUs %lld actualTimeUs %lld", (long long)timeUs, (long long)actualTimeUs);
615
616          break;
617      }
618
619      case kWhatStart:
620      case kWhatResume:
621      {
622          mBufferingMonitor->restartPollBuffering();
623          break;
624      }
625
626      case kWhatGetFormat:
627      {
628          onGetFormatMeta(msg);
629          break;
630      }
631
632      case kWhatGetSelectedTrack:
633      {
634          onGetSelectedTrack(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    size_t trackCount = mSources.size();
889    if (trackIndex >= trackCount) {
890        return NULL;
891    }
892
893    sp<AMessage> format = new AMessage();
894    sp<MetaData> meta = mSources.itemAt(trackIndex)->getFormat();
895    if (meta == NULL) {
896        ALOGE("no metadata for track %zu", trackIndex);
897        return NULL;
898    }
899
900    const char *mime;
901    CHECK(meta->findCString(kKeyMIMEType, &mime));
902    format->setString("mime", mime);
903
904    int32_t trackType;
905    if (!strncasecmp(mime, "video/", 6)) {
906        trackType = MEDIA_TRACK_TYPE_VIDEO;
907    } else if (!strncasecmp(mime, "audio/", 6)) {
908        trackType = MEDIA_TRACK_TYPE_AUDIO;
909    } else if (!strcasecmp(mime, MEDIA_MIMETYPE_TEXT_3GPP)) {
910        trackType = MEDIA_TRACK_TYPE_TIMEDTEXT;
911    } else {
912        trackType = MEDIA_TRACK_TYPE_UNKNOWN;
913    }
914    format->setInt32("type", trackType);
915
916    const char *lang;
917    if (!meta->findCString(kKeyMediaLanguage, &lang)) {
918        lang = "und";
919    }
920    format->setString("language", lang);
921
922    if (trackType == MEDIA_TRACK_TYPE_SUBTITLE) {
923        int32_t isAutoselect = 1, isDefault = 0, isForced = 0;
924        meta->findInt32(kKeyTrackIsAutoselect, &isAutoselect);
925        meta->findInt32(kKeyTrackIsDefault, &isDefault);
926        meta->findInt32(kKeyTrackIsForced, &isForced);
927
928        format->setInt32("auto", !!isAutoselect);
929        format->setInt32("default", !!isDefault);
930        format->setInt32("forced", !!isForced);
931    }
932
933    return format;
934}
935
936ssize_t NuPlayer::GenericSource::getSelectedTrack(media_track_type type) const {
937    sp<AMessage> msg = new AMessage(kWhatGetSelectedTrack, this);
938    msg->setInt32("type", type);
939
940    sp<AMessage> response;
941    int32_t index;
942    status_t err = msg->postAndAwaitResponse(&response);
943    if (err == OK && response != NULL) {
944        CHECK(response->findInt32("index", &index));
945        return index;
946    } else {
947        return -1;
948    }
949}
950
951void NuPlayer::GenericSource::onGetSelectedTrack(const sp<AMessage>& msg) const {
952    int32_t tmpType;
953    CHECK(msg->findInt32("type", &tmpType));
954    media_track_type type = (media_track_type)tmpType;
955
956    sp<AMessage> response = new AMessage;
957    ssize_t index = doGetSelectedTrack(type);
958    response->setInt32("index", index);
959
960    sp<AReplyToken> replyID;
961    CHECK(msg->senderAwaitsResponse(&replyID));
962    response->postReply(replyID);
963}
964
965ssize_t NuPlayer::GenericSource::doGetSelectedTrack(media_track_type type) const {
966    const Track *track = NULL;
967    switch (type) {
968    case MEDIA_TRACK_TYPE_VIDEO:
969        track = &mVideoTrack;
970        break;
971    case MEDIA_TRACK_TYPE_AUDIO:
972        track = &mAudioTrack;
973        break;
974    case MEDIA_TRACK_TYPE_TIMEDTEXT:
975        track = &mTimedTextTrack;
976        break;
977    case MEDIA_TRACK_TYPE_SUBTITLE:
978        track = &mSubtitleTrack;
979        break;
980    default:
981        break;
982    }
983
984    if (track != NULL && track->mSource != NULL) {
985        return track->mIndex;
986    }
987
988    return -1;
989}
990
991status_t NuPlayer::GenericSource::selectTrack(size_t trackIndex, bool select, int64_t timeUs) {
992    ALOGV("%s track: %zu", select ? "select" : "deselect", trackIndex);
993    sp<AMessage> msg = new AMessage(kWhatSelectTrack, this);
994    msg->setInt32("trackIndex", trackIndex);
995    msg->setInt32("select", select);
996    msg->setInt64("timeUs", timeUs);
997
998    sp<AMessage> response;
999    status_t err = msg->postAndAwaitResponse(&response);
1000    if (err == OK && response != NULL) {
1001        CHECK(response->findInt32("err", &err));
1002    }
1003
1004    return err;
1005}
1006
1007void NuPlayer::GenericSource::onSelectTrack(const sp<AMessage>& msg) {
1008    int32_t trackIndex, select;
1009    int64_t timeUs;
1010    CHECK(msg->findInt32("trackIndex", &trackIndex));
1011    CHECK(msg->findInt32("select", &select));
1012    CHECK(msg->findInt64("timeUs", &timeUs));
1013
1014    sp<AMessage> response = new AMessage;
1015    status_t err = doSelectTrack(trackIndex, select, timeUs);
1016    response->setInt32("err", err);
1017
1018    sp<AReplyToken> replyID;
1019    CHECK(msg->senderAwaitsResponse(&replyID));
1020    response->postReply(replyID);
1021}
1022
1023status_t NuPlayer::GenericSource::doSelectTrack(size_t trackIndex, bool select, int64_t timeUs) {
1024    if (trackIndex >= mSources.size()) {
1025        return BAD_INDEX;
1026    }
1027
1028    if (!select) {
1029        Track* track = NULL;
1030        if (mSubtitleTrack.mSource != NULL && trackIndex == mSubtitleTrack.mIndex) {
1031            track = &mSubtitleTrack;
1032            mFetchSubtitleDataGeneration++;
1033        } else if (mTimedTextTrack.mSource != NULL && trackIndex == mTimedTextTrack.mIndex) {
1034            track = &mTimedTextTrack;
1035            mFetchTimedTextDataGeneration++;
1036        }
1037        if (track == NULL) {
1038            return INVALID_OPERATION;
1039        }
1040        track->mSource->stop();
1041        track->mSource = NULL;
1042        track->mPackets->clear();
1043        return OK;
1044    }
1045
1046    const sp<IMediaSource> source = mSources.itemAt(trackIndex);
1047    sp<MetaData> meta = source->getFormat();
1048    const char *mime;
1049    CHECK(meta->findCString(kKeyMIMEType, &mime));
1050    if (!strncasecmp(mime, "text/", 5)) {
1051        bool isSubtitle = strcasecmp(mime, MEDIA_MIMETYPE_TEXT_3GPP);
1052        Track *track = isSubtitle ? &mSubtitleTrack : &mTimedTextTrack;
1053        if (track->mSource != NULL && track->mIndex == trackIndex) {
1054            return OK;
1055        }
1056        track->mIndex = trackIndex;
1057        if (track->mSource != NULL) {
1058            track->mSource->stop();
1059        }
1060        track->mSource = mSources.itemAt(trackIndex);
1061        track->mSource->start();
1062        if (track->mPackets == NULL) {
1063            track->mPackets = new AnotherPacketSource(track->mSource->getFormat());
1064        } else {
1065            track->mPackets->clear();
1066            track->mPackets->setFormat(track->mSource->getFormat());
1067
1068        }
1069
1070        if (isSubtitle) {
1071            mFetchSubtitleDataGeneration++;
1072        } else {
1073            mFetchTimedTextDataGeneration++;
1074        }
1075
1076        status_t eosResult; // ignored
1077        if (mSubtitleTrack.mSource != NULL
1078                && !mSubtitleTrack.mPackets->hasBufferAvailable(&eosResult)) {
1079            sp<AMessage> msg = new AMessage(kWhatFetchSubtitleData, this);
1080            msg->setInt64("timeUs", timeUs);
1081            msg->setInt32("generation", mFetchSubtitleDataGeneration);
1082            msg->post();
1083        }
1084
1085        sp<AMessage> msg2 = new AMessage(kWhatSendGlobalTimedTextData, this);
1086        msg2->setInt32("generation", mFetchTimedTextDataGeneration);
1087        msg2->post();
1088
1089        if (mTimedTextTrack.mSource != NULL
1090                && !mTimedTextTrack.mPackets->hasBufferAvailable(&eosResult)) {
1091            sp<AMessage> msg = new AMessage(kWhatFetchTimedTextData, this);
1092            msg->setInt64("timeUs", timeUs);
1093            msg->setInt32("generation", mFetchTimedTextDataGeneration);
1094            msg->post();
1095        }
1096
1097        return OK;
1098    } else if (!strncasecmp(mime, "audio/", 6) || !strncasecmp(mime, "video/", 6)) {
1099        bool audio = !strncasecmp(mime, "audio/", 6);
1100        Track *track = audio ? &mAudioTrack : &mVideoTrack;
1101        if (track->mSource != NULL && track->mIndex == trackIndex) {
1102            return OK;
1103        }
1104
1105        sp<AMessage> msg = new AMessage(kWhatChangeAVSource, this);
1106        msg->setInt32("trackIndex", trackIndex);
1107        msg->post();
1108        return OK;
1109    }
1110
1111    return INVALID_OPERATION;
1112}
1113
1114status_t NuPlayer::GenericSource::seekTo(int64_t seekTimeUs, MediaPlayerSeekMode mode) {
1115    sp<AMessage> msg = new AMessage(kWhatSeek, this);
1116    msg->setInt64("seekTimeUs", seekTimeUs);
1117    msg->setInt32("mode", mode);
1118
1119    sp<AMessage> response;
1120    status_t err = msg->postAndAwaitResponse(&response);
1121    if (err == OK && response != NULL) {
1122        CHECK(response->findInt32("err", &err));
1123    }
1124
1125    return err;
1126}
1127
1128void NuPlayer::GenericSource::onSeek(const sp<AMessage>& msg) {
1129    int64_t seekTimeUs;
1130    int32_t mode;
1131    CHECK(msg->findInt64("seekTimeUs", &seekTimeUs));
1132    CHECK(msg->findInt32("mode", &mode));
1133
1134    sp<AMessage> response = new AMessage;
1135    status_t err = doSeek(seekTimeUs, (MediaPlayerSeekMode)mode);
1136    response->setInt32("err", err);
1137
1138    sp<AReplyToken> replyID;
1139    CHECK(msg->senderAwaitsResponse(&replyID));
1140    response->postReply(replyID);
1141}
1142
1143status_t NuPlayer::GenericSource::doSeek(int64_t seekTimeUs, MediaPlayerSeekMode mode) {
1144    mBufferingMonitor->updateDequeuedBufferTime(-1ll);
1145
1146    // If the Widevine source is stopped, do not attempt to read any
1147    // more buffers.
1148    //
1149    // TODO: revisit after widevine is removed.  May be able to
1150    // combine mStopRead with mStarted.
1151    if (mStopRead) {
1152        return INVALID_OPERATION;
1153    }
1154    if (mVideoTrack.mSource != NULL) {
1155        int64_t actualTimeUs;
1156        readBuffer(MEDIA_TRACK_TYPE_VIDEO, seekTimeUs, mode, &actualTimeUs);
1157
1158        if (mode != MediaPlayerSeekMode::SEEK_CLOSEST) {
1159            seekTimeUs = actualTimeUs;
1160        }
1161        mVideoLastDequeueTimeUs = actualTimeUs;
1162    }
1163
1164    if (mAudioTrack.mSource != NULL) {
1165        readBuffer(MEDIA_TRACK_TYPE_AUDIO, seekTimeUs);
1166        mAudioLastDequeueTimeUs = seekTimeUs;
1167    }
1168
1169    setDrmPlaybackStatusIfNeeded(Playback::START, seekTimeUs / 1000);
1170    if (!mStarted) {
1171        setDrmPlaybackStatusIfNeeded(Playback::PAUSE, 0);
1172    }
1173
1174    // If currently buffering, post kWhatBufferingEnd first, so that
1175    // NuPlayer resumes. Otherwise, if cache hits high watermark
1176    // before new polling happens, no one will resume the playback.
1177    mBufferingMonitor->stopBufferingIfNecessary();
1178    mBufferingMonitor->restartPollBuffering();
1179
1180    return OK;
1181}
1182
1183sp<ABuffer> NuPlayer::GenericSource::mediaBufferToABuffer(
1184        MediaBuffer* mb,
1185        media_track_type trackType) {
1186    bool audio = trackType == MEDIA_TRACK_TYPE_AUDIO;
1187    size_t outLength = mb->range_length();
1188
1189    if (audio && mAudioIsVorbis) {
1190        outLength += sizeof(int32_t);
1191    }
1192
1193    sp<ABuffer> ab;
1194    if (mIsSecure && !audio) {
1195        // data is already provided in the buffer
1196        ab = new ABuffer(NULL, mb->range_length());
1197        mb->add_ref();
1198        ab->setMediaBufferBase(mb);
1199    } else {
1200        ab = new ABuffer(outLength);
1201        memcpy(ab->data(),
1202               (const uint8_t *)mb->data() + mb->range_offset(),
1203               mb->range_length());
1204    }
1205
1206    if (audio && mAudioIsVorbis) {
1207        int32_t numPageSamples;
1208        if (!mb->meta_data()->findInt32(kKeyValidSamples, &numPageSamples)) {
1209            numPageSamples = -1;
1210        }
1211
1212        uint8_t* abEnd = ab->data() + mb->range_length();
1213        memcpy(abEnd, &numPageSamples, sizeof(numPageSamples));
1214    }
1215
1216    sp<AMessage> meta = ab->meta();
1217
1218    int64_t timeUs;
1219    CHECK(mb->meta_data()->findInt64(kKeyTime, &timeUs));
1220    meta->setInt64("timeUs", timeUs);
1221
1222    if (trackType == MEDIA_TRACK_TYPE_VIDEO) {
1223        int32_t layerId;
1224        if (mb->meta_data()->findInt32(kKeyTemporalLayerId, &layerId)) {
1225            meta->setInt32("temporal-layer-id", layerId);
1226        }
1227    }
1228
1229    if (trackType == MEDIA_TRACK_TYPE_TIMEDTEXT) {
1230        const char *mime;
1231        CHECK(mTimedTextTrack.mSource != NULL
1232                && mTimedTextTrack.mSource->getFormat()->findCString(kKeyMIMEType, &mime));
1233        meta->setString("mime", mime);
1234    }
1235
1236    int64_t durationUs;
1237    if (mb->meta_data()->findInt64(kKeyDuration, &durationUs)) {
1238        meta->setInt64("durationUs", durationUs);
1239    }
1240
1241    if (trackType == MEDIA_TRACK_TYPE_SUBTITLE) {
1242        meta->setInt32("trackIndex", mSubtitleTrack.mIndex);
1243    }
1244
1245    uint32_t dataType; // unused
1246    const void *seiData;
1247    size_t seiLength;
1248    if (mb->meta_data()->findData(kKeySEI, &dataType, &seiData, &seiLength)) {
1249        sp<ABuffer> sei = ABuffer::CreateAsCopy(seiData, seiLength);;
1250        meta->setBuffer("sei", sei);
1251    }
1252
1253    const void *mpegUserDataPointer;
1254    size_t mpegUserDataLength;
1255    if (mb->meta_data()->findData(
1256            kKeyMpegUserData, &dataType, &mpegUserDataPointer, &mpegUserDataLength)) {
1257        sp<ABuffer> mpegUserData = ABuffer::CreateAsCopy(mpegUserDataPointer, mpegUserDataLength);
1258        meta->setBuffer("mpegUserData", mpegUserData);
1259    }
1260
1261    mb->release();
1262    mb = NULL;
1263
1264    return ab;
1265}
1266
1267void NuPlayer::GenericSource::postReadBuffer(media_track_type trackType) {
1268    Mutex::Autolock _l(mReadBufferLock);
1269
1270    if ((mPendingReadBufferTypes & (1 << trackType)) == 0) {
1271        mPendingReadBufferTypes |= (1 << trackType);
1272        sp<AMessage> msg = new AMessage(kWhatReadBuffer, this);
1273        msg->setInt32("trackType", trackType);
1274        msg->post();
1275    }
1276}
1277
1278void NuPlayer::GenericSource::onReadBuffer(const sp<AMessage>& msg) {
1279    int32_t tmpType;
1280    CHECK(msg->findInt32("trackType", &tmpType));
1281    media_track_type trackType = (media_track_type)tmpType;
1282    readBuffer(trackType);
1283    {
1284        // only protect the variable change, as readBuffer may
1285        // take considerable time.
1286        Mutex::Autolock _l(mReadBufferLock);
1287        mPendingReadBufferTypes &= ~(1 << trackType);
1288    }
1289}
1290
1291void NuPlayer::GenericSource::readBuffer(
1292        media_track_type trackType, int64_t seekTimeUs, MediaPlayerSeekMode mode,
1293        int64_t *actualTimeUs, bool formatChange) {
1294    // Do not read data if Widevine source is stopped
1295    //
1296    // TODO: revisit after widevine is removed.  May be able to
1297    // combine mStopRead with mStarted.
1298    if (mStopRead) {
1299        return;
1300    }
1301    Track *track;
1302    size_t maxBuffers = 1;
1303    switch (trackType) {
1304        case MEDIA_TRACK_TYPE_VIDEO:
1305            track = &mVideoTrack;
1306            maxBuffers = 8;  // too large of a number may influence seeks
1307            break;
1308        case MEDIA_TRACK_TYPE_AUDIO:
1309            track = &mAudioTrack;
1310            maxBuffers = 64;
1311            break;
1312        case MEDIA_TRACK_TYPE_SUBTITLE:
1313            track = &mSubtitleTrack;
1314            break;
1315        case MEDIA_TRACK_TYPE_TIMEDTEXT:
1316            track = &mTimedTextTrack;
1317            break;
1318        default:
1319            TRESPASS();
1320    }
1321
1322    if (track->mSource == NULL) {
1323        return;
1324    }
1325
1326    if (actualTimeUs) {
1327        *actualTimeUs = seekTimeUs;
1328    }
1329
1330    MediaSource::ReadOptions options;
1331
1332    bool seeking = false;
1333    if (seekTimeUs >= 0) {
1334        options.setSeekTo(seekTimeUs, mode);
1335        seeking = true;
1336    }
1337
1338    const bool couldReadMultiple = (track->mSource->supportReadMultiple());
1339
1340    if (couldReadMultiple) {
1341        options.setNonBlocking();
1342    }
1343
1344    for (size_t numBuffers = 0; numBuffers < maxBuffers; ) {
1345        Vector<MediaBuffer *> mediaBuffers;
1346        status_t err = NO_ERROR;
1347
1348        if (couldReadMultiple) {
1349            err = track->mSource->readMultiple(
1350                    &mediaBuffers, maxBuffers - numBuffers, &options);
1351        } else {
1352            MediaBuffer *mbuf = NULL;
1353            err = track->mSource->read(&mbuf, &options);
1354            if (err == OK && mbuf != NULL) {
1355                mediaBuffers.push_back(mbuf);
1356            }
1357        }
1358
1359        options.clearNonPersistent();
1360
1361        size_t id = 0;
1362        size_t count = mediaBuffers.size();
1363        for (; id < count; ++id) {
1364            int64_t timeUs;
1365            MediaBuffer *mbuf = mediaBuffers[id];
1366            if (!mbuf->meta_data()->findInt64(kKeyTime, &timeUs)) {
1367                mbuf->meta_data()->dumpToLog();
1368                track->mPackets->signalEOS(ERROR_MALFORMED);
1369                break;
1370            }
1371            if (trackType == MEDIA_TRACK_TYPE_AUDIO) {
1372                mAudioTimeUs = timeUs;
1373                mBufferingMonitor->updateQueuedTime(true /* isAudio */, timeUs);
1374            } else if (trackType == MEDIA_TRACK_TYPE_VIDEO) {
1375                mVideoTimeUs = timeUs;
1376                mBufferingMonitor->updateQueuedTime(false /* isAudio */, timeUs);
1377            }
1378
1379            queueDiscontinuityIfNeeded(seeking, formatChange, trackType, track);
1380
1381            sp<ABuffer> buffer = mediaBufferToABuffer(mbuf, trackType);
1382            if (numBuffers == 0 && actualTimeUs != nullptr) {
1383                *actualTimeUs = timeUs;
1384            }
1385            if (seeking && buffer != nullptr) {
1386                sp<AMessage> meta = buffer->meta();
1387                if (meta != nullptr && mode == MediaPlayerSeekMode::SEEK_CLOSEST
1388                        && seekTimeUs > timeUs) {
1389                    sp<AMessage> extra = new AMessage;
1390                    extra->setInt64("resume-at-mediaTimeUs", seekTimeUs);
1391                    meta->setMessage("extra", extra);
1392                }
1393            }
1394
1395            track->mPackets->queueAccessUnit(buffer);
1396            formatChange = false;
1397            seeking = false;
1398            ++numBuffers;
1399        }
1400        if (id < count) {
1401            // Error, some mediaBuffer doesn't have kKeyTime.
1402            for (; id < count; ++id) {
1403                mediaBuffers[id]->release();
1404            }
1405            break;
1406        }
1407
1408        if (err == WOULD_BLOCK) {
1409            break;
1410        } else if (err == INFO_FORMAT_CHANGED) {
1411#if 0
1412            track->mPackets->queueDiscontinuity(
1413                    ATSParser::DISCONTINUITY_FORMATCHANGE,
1414                    NULL,
1415                    false /* discard */);
1416#endif
1417        } else if (err != OK) {
1418            queueDiscontinuityIfNeeded(seeking, formatChange, trackType, track);
1419            track->mPackets->signalEOS(err);
1420            break;
1421        }
1422    }
1423}
1424
1425void NuPlayer::GenericSource::queueDiscontinuityIfNeeded(
1426        bool seeking, bool formatChange, media_track_type trackType, Track *track) {
1427    // formatChange && seeking: track whose source is changed during selection
1428    // formatChange && !seeking: track whose source is not changed during selection
1429    // !formatChange: normal seek
1430    if ((seeking || formatChange)
1431            && (trackType == MEDIA_TRACK_TYPE_AUDIO
1432            || trackType == MEDIA_TRACK_TYPE_VIDEO)) {
1433        ATSParser::DiscontinuityType type = (formatChange && seeking)
1434                ? ATSParser::DISCONTINUITY_FORMATCHANGE
1435                : ATSParser::DISCONTINUITY_NONE;
1436        track->mPackets->queueDiscontinuity(type, NULL /* extra */, true /* discard */);
1437    }
1438}
1439
1440NuPlayer::GenericSource::BufferingMonitor::BufferingMonitor(const sp<AMessage> &notify)
1441    : mNotify(notify),
1442      mDurationUs(-1ll),
1443      mBitrate(-1ll),
1444      mIsStreaming(false),
1445      mAudioTimeUs(0),
1446      mVideoTimeUs(0),
1447      mPollBufferingGeneration(0),
1448      mPrepareBuffering(false),
1449      mBuffering(false),
1450      mPrevBufferPercentage(-1),
1451      mOffloadAudio(false),
1452      mFirstDequeuedBufferRealUs(-1ll),
1453      mFirstDequeuedBufferMediaUs(-1ll),
1454      mlastDequeuedBufferMediaUs(-1ll) {
1455}
1456
1457NuPlayer::GenericSource::BufferingMonitor::~BufferingMonitor() {
1458}
1459
1460void NuPlayer::GenericSource::BufferingMonitor::prepare(
1461        const sp<NuCachedSource2> &cachedSource,
1462        int64_t durationUs,
1463        int64_t bitrate,
1464        bool isStreaming) {
1465    Mutex::Autolock _l(mLock);
1466    prepare_l(cachedSource, durationUs, bitrate, isStreaming);
1467}
1468
1469void NuPlayer::GenericSource::BufferingMonitor::stop() {
1470    Mutex::Autolock _l(mLock);
1471    prepare_l(NULL /* cachedSource */, -1 /* durationUs */,
1472            -1 /* bitrate */, false /* isStreaming */);
1473}
1474
1475void NuPlayer::GenericSource::BufferingMonitor::cancelPollBuffering() {
1476    Mutex::Autolock _l(mLock);
1477    cancelPollBuffering_l();
1478}
1479
1480void NuPlayer::GenericSource::BufferingMonitor::restartPollBuffering() {
1481    Mutex::Autolock _l(mLock);
1482    if (mIsStreaming) {
1483        cancelPollBuffering_l();
1484        onPollBuffering_l();
1485    }
1486}
1487
1488void NuPlayer::GenericSource::BufferingMonitor::stopBufferingIfNecessary() {
1489    Mutex::Autolock _l(mLock);
1490    stopBufferingIfNecessary_l();
1491}
1492
1493void NuPlayer::GenericSource::BufferingMonitor::ensureCacheIsFetching() {
1494    Mutex::Autolock _l(mLock);
1495    ensureCacheIsFetching_l();
1496}
1497
1498void NuPlayer::GenericSource::BufferingMonitor::updateQueuedTime(bool isAudio, int64_t timeUs) {
1499    Mutex::Autolock _l(mLock);
1500    if (isAudio) {
1501        mAudioTimeUs = timeUs;
1502    } else {
1503        mVideoTimeUs = timeUs;
1504    }
1505}
1506
1507void NuPlayer::GenericSource::BufferingMonitor::setOffloadAudio(bool offload) {
1508    Mutex::Autolock _l(mLock);
1509    mOffloadAudio = offload;
1510}
1511
1512void NuPlayer::GenericSource::BufferingMonitor::updateDequeuedBufferTime(int64_t mediaUs) {
1513    Mutex::Autolock _l(mLock);
1514    if (mediaUs < 0) {
1515        mFirstDequeuedBufferRealUs = -1ll;
1516        mFirstDequeuedBufferMediaUs = -1ll;
1517    } else if (mFirstDequeuedBufferRealUs < 0) {
1518        mFirstDequeuedBufferRealUs = ALooper::GetNowUs();
1519        mFirstDequeuedBufferMediaUs = mediaUs;
1520    }
1521    mlastDequeuedBufferMediaUs = mediaUs;
1522}
1523
1524void NuPlayer::GenericSource::BufferingMonitor::prepare_l(
1525        const sp<NuCachedSource2> &cachedSource,
1526        int64_t durationUs,
1527        int64_t bitrate,
1528        bool isStreaming) {
1529
1530    mCachedSource = cachedSource;
1531    mDurationUs = durationUs;
1532    mBitrate = bitrate;
1533    mIsStreaming = isStreaming;
1534    mAudioTimeUs = 0;
1535    mVideoTimeUs = 0;
1536    mPrepareBuffering = (cachedSource != NULL);
1537    cancelPollBuffering_l();
1538    mOffloadAudio = false;
1539    mFirstDequeuedBufferRealUs = -1ll;
1540    mFirstDequeuedBufferMediaUs = -1ll;
1541    mlastDequeuedBufferMediaUs = -1ll;
1542}
1543
1544void NuPlayer::GenericSource::BufferingMonitor::cancelPollBuffering_l() {
1545    mBuffering = false;
1546    ++mPollBufferingGeneration;
1547    mPrevBufferPercentage = -1;
1548}
1549
1550void NuPlayer::GenericSource::BufferingMonitor::notifyBufferingUpdate_l(int32_t percentage) {
1551    // Buffering percent could go backward as it's estimated from remaining
1552    // data and last access time. This could cause the buffering position
1553    // drawn on media control to jitter slightly. Remember previously reported
1554    // percentage and don't allow it to go backward.
1555    if (percentage < mPrevBufferPercentage) {
1556        percentage = mPrevBufferPercentage;
1557    } else if (percentage > 100) {
1558        percentage = 100;
1559    }
1560
1561    mPrevBufferPercentage = percentage;
1562
1563    ALOGV("notifyBufferingUpdate_l: buffering %d%%", percentage);
1564
1565    sp<AMessage> msg = mNotify->dup();
1566    msg->setInt32("what", kWhatBufferingUpdate);
1567    msg->setInt32("percentage", percentage);
1568    msg->post();
1569}
1570
1571void NuPlayer::GenericSource::BufferingMonitor::startBufferingIfNecessary_l() {
1572    if (mPrepareBuffering) {
1573        return;
1574    }
1575
1576    if (!mBuffering) {
1577        ALOGD("startBufferingIfNecessary_l");
1578
1579        mBuffering = true;
1580
1581        ensureCacheIsFetching_l();
1582        sendCacheStats_l();
1583
1584        sp<AMessage> notify = mNotify->dup();
1585        notify->setInt32("what", kWhatPauseOnBufferingStart);
1586        notify->post();
1587    }
1588}
1589
1590void NuPlayer::GenericSource::BufferingMonitor::stopBufferingIfNecessary_l() {
1591    if (mPrepareBuffering) {
1592        ALOGD("stopBufferingIfNecessary_l, mBuffering=%d", mBuffering);
1593
1594        mPrepareBuffering = false;
1595
1596        sp<AMessage> notify = mNotify->dup();
1597        notify->setInt32("what", kWhatPrepared);
1598        notify->setInt32("err", OK);
1599        notify->post();
1600
1601        return;
1602    }
1603
1604    if (mBuffering) {
1605        ALOGD("stopBufferingIfNecessary_l");
1606        mBuffering = false;
1607
1608        sendCacheStats_l();
1609
1610        sp<AMessage> notify = mNotify->dup();
1611        notify->setInt32("what", kWhatResumeOnBufferingEnd);
1612        notify->post();
1613    }
1614}
1615
1616void NuPlayer::GenericSource::BufferingMonitor::sendCacheStats_l() {
1617    int32_t kbps = 0;
1618    status_t err = UNKNOWN_ERROR;
1619
1620    if (mCachedSource != NULL) {
1621        err = mCachedSource->getEstimatedBandwidthKbps(&kbps);
1622    }
1623
1624    if (err == OK) {
1625        sp<AMessage> notify = mNotify->dup();
1626        notify->setInt32("what", kWhatCacheStats);
1627        notify->setInt32("bandwidth", kbps);
1628        notify->post();
1629    }
1630}
1631
1632void NuPlayer::GenericSource::BufferingMonitor::ensureCacheIsFetching_l() {
1633    if (mCachedSource != NULL) {
1634        mCachedSource->resumeFetchingIfNecessary();
1635    }
1636}
1637
1638void NuPlayer::GenericSource::BufferingMonitor::schedulePollBuffering_l() {
1639    sp<AMessage> msg = new AMessage(kWhatPollBuffering, this);
1640    msg->setInt32("generation", mPollBufferingGeneration);
1641    // Enquires buffering status every second.
1642    msg->post(1000000ll);
1643}
1644
1645int64_t NuPlayer::GenericSource::BufferingMonitor::getLastReadPosition_l() {
1646    if (mAudioTimeUs > 0) {
1647        return mAudioTimeUs;
1648    } else if (mVideoTimeUs > 0) {
1649        return mVideoTimeUs;
1650    } else {
1651        return 0;
1652    }
1653}
1654
1655void NuPlayer::GenericSource::BufferingMonitor::onPollBuffering_l() {
1656    status_t finalStatus = UNKNOWN_ERROR;
1657    int64_t cachedDurationUs = -1ll;
1658    ssize_t cachedDataRemaining = -1;
1659
1660    if (mCachedSource != NULL) {
1661        cachedDataRemaining =
1662                mCachedSource->approxDataRemaining(&finalStatus);
1663
1664        if (finalStatus == OK) {
1665            off64_t size;
1666            int64_t bitrate = 0ll;
1667            if (mDurationUs > 0 && mCachedSource->getSize(&size) == OK) {
1668                // |bitrate| uses bits/second unit, while size is number of bytes.
1669                bitrate = size * 8000000ll / mDurationUs;
1670            } else if (mBitrate > 0) {
1671                bitrate = mBitrate;
1672            }
1673            if (bitrate > 0) {
1674                cachedDurationUs = cachedDataRemaining * 8000000ll / bitrate;
1675            }
1676        }
1677    }
1678
1679    if (finalStatus != OK) {
1680        ALOGV("onPollBuffering_l: EOS (finalStatus = %d)", finalStatus);
1681
1682        if (finalStatus == ERROR_END_OF_STREAM) {
1683            notifyBufferingUpdate_l(100);
1684        }
1685
1686        stopBufferingIfNecessary_l();
1687        return;
1688    } else if (cachedDurationUs >= 0ll) {
1689        if (mDurationUs > 0ll) {
1690            int64_t cachedPosUs = getLastReadPosition_l() + cachedDurationUs;
1691            int percentage = 100.0 * cachedPosUs / mDurationUs;
1692            if (percentage > 100) {
1693                percentage = 100;
1694            }
1695
1696            notifyBufferingUpdate_l(percentage);
1697        }
1698
1699        ALOGV("onPollBuffering_l: cachedDurationUs %.1f sec",
1700                cachedDurationUs / 1000000.0f);
1701
1702        if (cachedDurationUs < kLowWaterMarkUs) {
1703            // Take into account the data cached in downstream components to try to avoid
1704            // unnecessary pause.
1705            if (mOffloadAudio && mFirstDequeuedBufferRealUs >= 0) {
1706                int64_t downStreamCacheUs = mlastDequeuedBufferMediaUs - mFirstDequeuedBufferMediaUs
1707                        - (ALooper::GetNowUs() - mFirstDequeuedBufferRealUs);
1708                if (downStreamCacheUs > 0) {
1709                    cachedDurationUs += downStreamCacheUs;
1710                }
1711            }
1712
1713            if (cachedDurationUs < kLowWaterMarkUs) {
1714                startBufferingIfNecessary_l();
1715            }
1716        } else {
1717            int64_t highWaterMark = mPrepareBuffering ? kHighWaterMarkUs : kHighWaterMarkRebufferUs;
1718            if (cachedDurationUs > highWaterMark) {
1719                stopBufferingIfNecessary_l();
1720            }
1721        }
1722    } else if (cachedDataRemaining >= 0) {
1723        ALOGV("onPollBuffering_l: cachedDataRemaining %zd bytes",
1724                cachedDataRemaining);
1725
1726        if (cachedDataRemaining < kLowWaterMarkBytes) {
1727            startBufferingIfNecessary_l();
1728        } else if (cachedDataRemaining > kHighWaterMarkBytes) {
1729            stopBufferingIfNecessary_l();
1730        }
1731    }
1732
1733    schedulePollBuffering_l();
1734}
1735
1736void NuPlayer::GenericSource::BufferingMonitor::onMessageReceived(const sp<AMessage> &msg) {
1737    switch (msg->what()) {
1738      case kWhatPollBuffering:
1739      {
1740          int32_t generation;
1741          CHECK(msg->findInt32("generation", &generation));
1742          Mutex::Autolock _l(mLock);
1743          if (generation == mPollBufferingGeneration) {
1744              onPollBuffering_l();
1745          }
1746          break;
1747      }
1748      default:
1749          TRESPASS();
1750          break;
1751    }
1752}
1753
1754}  // namespace android
1755