GenericSource.cpp revision ac6b30acb174dbdf35f845924cd63bdc48c43e8a 
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 int64_t kLowWaterMarkUs = 2000000ll;  // 2secs
42static int64_t kHighWaterMarkUs = 5000000ll;  // 5secs
43static int64_t kHighWaterMarkRebufferUs = 15000000ll;  // 15secs
44static const ssize_t kLowWaterMarkBytes = 40000;
45static const ssize_t kHighWaterMarkBytes = 200000;
46
47NuPlayer::GenericSource::GenericSource(
48        const sp<AMessage> &notify,
49        bool uidValid,
50        uid_t uid)
51    : Source(notify),
52      mAudioTimeUs(0),
53      mAudioLastDequeueTimeUs(0),
54      mVideoTimeUs(0),
55      mVideoLastDequeueTimeUs(0),
56      mFetchSubtitleDataGeneration(0),
57      mFetchTimedTextDataGeneration(0),
58      mDurationUs(-1ll),
59      mAudioIsVorbis(false),
60      mIsSecure(false),
61      mIsStreaming(false),
62      mUIDValid(uidValid),
63      mUID(uid),
64      mFd(-1),
65      mDrmManagerClient(NULL),
66      mBitrate(-1ll),
67      mPendingReadBufferTypes(0) {
68    mBufferingMonitor = new BufferingMonitor(notify);
69    resetDataSource();
70}
71
72void NuPlayer::GenericSource::resetDataSource() {
73    mHTTPService.clear();
74    mHttpSource.clear();
75    mUri.clear();
76    mUriHeaders.clear();
77    if (mFd >= 0) {
78        close(mFd);
79        mFd = -1;
80    }
81    mOffset = 0;
82    mLength = 0;
83    setDrmPlaybackStatusIfNeeded(Playback::STOP, 0);
84    mDecryptHandle = NULL;
85    mDrmManagerClient = NULL;
86    mStarted = false;
87    mStopRead = true;
88
89    if (mBufferingMonitorLooper != NULL) {
90        mBufferingMonitorLooper->unregisterHandler(mBufferingMonitor->id());
91        mBufferingMonitorLooper->stop();
92        mBufferingMonitorLooper = NULL;
93    }
94    mBufferingMonitor->stop();
95}
96
97status_t NuPlayer::GenericSource::setDataSource(
98        const sp<IMediaHTTPService> &httpService,
99        const char *url,
100        const KeyedVector<String8, String8> *headers) {
101    resetDataSource();
102
103    mHTTPService = httpService;
104    mUri = url;
105
106    if (headers) {
107        mUriHeaders = *headers;
108    }
109
110    // delay data source creation to prepareAsync() to avoid blocking
111    // the calling thread in setDataSource for any significant time.
112    return OK;
113}
114
115status_t NuPlayer::GenericSource::setDataSource(
116        int fd, int64_t offset, int64_t length) {
117    resetDataSource();
118
119    mFd = dup(fd);
120    mOffset = offset;
121    mLength = length;
122
123    // delay data source creation to prepareAsync() to avoid blocking
124    // the calling thread in setDataSource for any significant time.
125    return OK;
126}
127
128status_t NuPlayer::GenericSource::setDataSource(const sp<DataSource>& source) {
129    resetDataSource();
130    mDataSource = source;
131    return OK;
132}
133
134sp<MetaData> NuPlayer::GenericSource::getFileFormatMeta() const {
135    return mFileMeta;
136}
137
138status_t NuPlayer::GenericSource::initFromDataSource() {
139    sp<IMediaExtractor> extractor;
140    CHECK(mDataSource != NULL);
141
142    extractor = MediaExtractor::Create(mDataSource, NULL);
143
144    if (extractor == NULL) {
145        return UNKNOWN_ERROR;
146    }
147
148    if (extractor->getDrmFlag()) {
149        checkDrmStatus(mDataSource);
150    }
151
152    mFileMeta = extractor->getMetaData();
153    if (mFileMeta != NULL) {
154        int64_t duration;
155        if (mFileMeta->findInt64(kKeyDuration, &duration)) {
156            mDurationUs = duration;
157        }
158    }
159
160    int32_t totalBitrate = 0;
161
162    size_t numtracks = extractor->countTracks();
163    if (numtracks == 0) {
164        return UNKNOWN_ERROR;
165    }
166
167    for (size_t i = 0; i < numtracks; ++i) {
168        sp<IMediaSource> track = extractor->getTrack(i);
169        if (track == NULL) {
170            continue;
171        }
172
173        sp<MetaData> meta = extractor->getTrackMetaData(i);
174        if (meta == NULL) {
175            ALOGE("no metadata for track %zu", i);
176            return UNKNOWN_ERROR;
177        }
178
179        const char *mime;
180        CHECK(meta->findCString(kKeyMIMEType, &mime));
181
182        // Do the string compare immediately with "mime",
183        // we can't assume "mime" would stay valid after another
184        // extractor operation, some extractors might modify meta
185        // during getTrack() and make it invalid.
186        if (!strncasecmp(mime, "audio/", 6)) {
187            if (mAudioTrack.mSource == NULL) {
188                mAudioTrack.mIndex = i;
189                mAudioTrack.mSource = track;
190                mAudioTrack.mPackets =
191                    new AnotherPacketSource(mAudioTrack.mSource->getFormat());
192
193                if (!strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_VORBIS)) {
194                    mAudioIsVorbis = true;
195                } else {
196                    mAudioIsVorbis = false;
197                }
198            }
199        } else if (!strncasecmp(mime, "video/", 6)) {
200            if (mVideoTrack.mSource == NULL) {
201                mVideoTrack.mIndex = i;
202                mVideoTrack.mSource = track;
203                mVideoTrack.mPackets =
204                    new AnotherPacketSource(mVideoTrack.mSource->getFormat());
205
206                // check if the source requires secure buffers
207                int32_t secure;
208                if (meta->findInt32(kKeyRequiresSecureBuffers, &secure)
209                        && secure) {
210                    mIsSecure = true;
211                    if (mUIDValid) {
212                        extractor->setUID(mUID);
213                    }
214                }
215            }
216        }
217
218        mSources.push(track);
219        int64_t durationUs;
220        if (meta->findInt64(kKeyDuration, &durationUs)) {
221            if (durationUs > mDurationUs) {
222                mDurationUs = durationUs;
223            }
224        }
225
226        int32_t bitrate;
227        if (totalBitrate >= 0 && meta->findInt32(kKeyBitRate, &bitrate)) {
228            totalBitrate += bitrate;
229        } else {
230            totalBitrate = -1;
231        }
232    }
233
234    if (mSources.size() == 0) {
235        ALOGE("b/23705695");
236        return UNKNOWN_ERROR;
237    }
238
239    mBitrate = totalBitrate;
240
241    return OK;
242}
243
244status_t NuPlayer::GenericSource::startSources() {
245    // Start the selected A/V tracks now before we start buffering.
246    // Widevine sources might re-initialize crypto when starting, if we delay
247    // this to start(), all data buffered during prepare would be wasted.
248    // (We don't actually start reading until start().)
249    //
250    // TODO: this logic may no longer be relevant after the removal of widevine
251    // support
252    if (mAudioTrack.mSource != NULL && mAudioTrack.mSource->start() != OK) {
253        ALOGE("failed to start audio track!");
254        return UNKNOWN_ERROR;
255    }
256
257    if (mVideoTrack.mSource != NULL && mVideoTrack.mSource->start() != OK) {
258        ALOGE("failed to start video track!");
259        return UNKNOWN_ERROR;
260    }
261
262    return OK;
263}
264
265void NuPlayer::GenericSource::checkDrmStatus(const sp<DataSource>& dataSource) {
266    dataSource->getDrmInfo(mDecryptHandle, &mDrmManagerClient);
267    if (mDecryptHandle != NULL) {
268        CHECK(mDrmManagerClient);
269        if (RightsStatus::RIGHTS_VALID != mDecryptHandle->status) {
270            sp<AMessage> msg = dupNotify();
271            msg->setInt32("what", kWhatDrmNoLicense);
272            msg->post();
273        }
274    }
275}
276
277int64_t NuPlayer::GenericSource::getLastReadPosition() {
278    if (mAudioTrack.mSource != NULL) {
279        return mAudioTimeUs;
280    } else if (mVideoTrack.mSource != NULL) {
281        return mVideoTimeUs;
282    } else {
283        return 0;
284    }
285}
286
287status_t NuPlayer::GenericSource::setBuffers(
288        bool audio, Vector<MediaBuffer *> &buffers) {
289    if (mIsSecure && !audio && mVideoTrack.mSource != NULL) {
290        return mVideoTrack.mSource->setBuffers(buffers);
291    }
292    return INVALID_OPERATION;
293}
294
295bool NuPlayer::GenericSource::isStreaming() const {
296    return mIsStreaming;
297}
298
299void NuPlayer::GenericSource::setOffloadAudio(bool offload) {
300    mBufferingMonitor->setOffloadAudio(offload);
301}
302
303NuPlayer::GenericSource::~GenericSource() {
304    if (mLooper != NULL) {
305        mLooper->unregisterHandler(id());
306        mLooper->stop();
307    }
308    resetDataSource();
309}
310
311void NuPlayer::GenericSource::prepareAsync() {
312    if (mLooper == NULL) {
313        mLooper = new ALooper;
314        mLooper->setName("generic");
315        mLooper->start();
316
317        mLooper->registerHandler(this);
318    }
319
320    sp<AMessage> msg = new AMessage(kWhatPrepareAsync, this);
321    msg->post();
322}
323
324void NuPlayer::GenericSource::onPrepareAsync() {
325    // delayed data source creation
326    if (mDataSource == NULL) {
327        // set to false first, if the extractor
328        // comes back as secure, set it to true then.
329        mIsSecure = false;
330
331        if (!mUri.empty()) {
332            const char* uri = mUri.c_str();
333            String8 contentType;
334
335            if (!strncasecmp("http://", uri, 7) || !strncasecmp("https://", uri, 8)) {
336                mHttpSource = DataSource::CreateMediaHTTP(mHTTPService);
337                if (mHttpSource == NULL) {
338                    ALOGE("Failed to create http source!");
339                    notifyPreparedAndCleanup(UNKNOWN_ERROR);
340                    return;
341                }
342            }
343
344            mDataSource = DataSource::CreateFromURI(
345                   mHTTPService, uri, &mUriHeaders, &contentType,
346                   static_cast<HTTPBase *>(mHttpSource.get()));
347        } else {
348            mDataSource = new FileSource(mFd, mOffset, mLength);
349            mFd = -1;
350        }
351
352        if (mDataSource == NULL) {
353            ALOGE("Failed to create data source!");
354            notifyPreparedAndCleanup(UNKNOWN_ERROR);
355            return;
356        }
357    }
358
359    if (mDataSource->flags() & DataSource::kIsCachingDataSource) {
360        mCachedSource = static_cast<NuCachedSource2 *>(mDataSource.get());
361    }
362
363    // For cached streaming cases, we need to wait for enough
364    // buffering before reporting prepared.
365    mIsStreaming = (mCachedSource != NULL);
366
367    // init extractor from data source
368    status_t err = initFromDataSource();
369
370    if (err != OK) {
371        ALOGE("Failed to init from data source!");
372        notifyPreparedAndCleanup(err);
373        return;
374    }
375
376    if (mVideoTrack.mSource != NULL) {
377        sp<MetaData> meta = doGetFormatMeta(false /* audio */);
378        sp<AMessage> msg = new AMessage;
379        err = convertMetaDataToMessage(meta, &msg);
380        if(err != OK) {
381            notifyPreparedAndCleanup(err);
382            return;
383        }
384        notifyVideoSizeChanged(msg);
385    }
386
387    notifyFlagsChanged(
388            (mIsSecure ? FLAG_SECURE : 0)
389            | (mDecryptHandle != NULL ? FLAG_PROTECTED : 0)
390            | FLAG_CAN_PAUSE
391            | FLAG_CAN_SEEK_BACKWARD
392            | FLAG_CAN_SEEK_FORWARD
393            | FLAG_CAN_SEEK);
394
395    if (mIsSecure) {
396        // secure decoders must be instantiated before starting widevine source
397        //
398        // TODO: mIsSecure and FLAG_SECURE may be obsolete, revisit after
399        // removing widevine
400        sp<AMessage> reply = new AMessage(kWhatSecureDecodersInstantiated, this);
401        notifyInstantiateSecureDecoders(reply);
402    } else {
403        finishPrepareAsync();
404    }
405}
406
407void NuPlayer::GenericSource::onSecureDecodersInstantiated(status_t err) {
408    if (err != OK) {
409        ALOGE("Failed to instantiate secure decoders!");
410        notifyPreparedAndCleanup(err);
411        return;
412    }
413    finishPrepareAsync();
414}
415
416void NuPlayer::GenericSource::finishPrepareAsync() {
417    status_t err = startSources();
418    if (err != OK) {
419        ALOGE("Failed to init start data source!");
420        notifyPreparedAndCleanup(err);
421        return;
422    }
423
424    if (mIsStreaming) {
425        if (mBufferingMonitorLooper == NULL) {
426            mBufferingMonitor->prepare(mCachedSource, mDurationUs, mBitrate,
427                    mIsStreaming);
428
429            mBufferingMonitorLooper = new ALooper;
430            mBufferingMonitorLooper->setName("GSBMonitor");
431            mBufferingMonitorLooper->start();
432            mBufferingMonitorLooper->registerHandler(mBufferingMonitor);
433        }
434
435        mBufferingMonitor->ensureCacheIsFetching();
436        mBufferingMonitor->restartPollBuffering();
437    } else {
438        notifyPrepared();
439    }
440}
441
442void NuPlayer::GenericSource::notifyPreparedAndCleanup(status_t err) {
443    if (err != OK) {
444        {
445            sp<DataSource> dataSource = mDataSource;
446            sp<NuCachedSource2> cachedSource = mCachedSource;
447            sp<DataSource> httpSource = mHttpSource;
448            {
449                Mutex::Autolock _l(mDisconnectLock);
450                mDataSource.clear();
451                mDecryptHandle = NULL;
452                mDrmManagerClient = NULL;
453                mCachedSource.clear();
454                mHttpSource.clear();
455            }
456        }
457        mBitrate = -1;
458
459        mBufferingMonitor->cancelPollBuffering();
460    }
461    notifyPrepared(err);
462}
463
464void NuPlayer::GenericSource::start() {
465    ALOGI("start");
466
467    mStopRead = false;
468    if (mAudioTrack.mSource != NULL) {
469        postReadBuffer(MEDIA_TRACK_TYPE_AUDIO);
470    }
471
472    if (mVideoTrack.mSource != NULL) {
473        postReadBuffer(MEDIA_TRACK_TYPE_VIDEO);
474    }
475
476    setDrmPlaybackStatusIfNeeded(Playback::START, getLastReadPosition() / 1000);
477    mStarted = true;
478
479    (new AMessage(kWhatStart, this))->post();
480}
481
482void NuPlayer::GenericSource::stop() {
483    // nothing to do, just account for DRM playback status
484    setDrmPlaybackStatusIfNeeded(Playback::STOP, 0);
485    mStarted = false;
486}
487
488void NuPlayer::GenericSource::pause() {
489    // nothing to do, just account for DRM playback status
490    setDrmPlaybackStatusIfNeeded(Playback::PAUSE, 0);
491    mStarted = false;
492}
493
494void NuPlayer::GenericSource::resume() {
495    // nothing to do, just account for DRM playback status
496    setDrmPlaybackStatusIfNeeded(Playback::START, getLastReadPosition() / 1000);
497    mStarted = true;
498
499    (new AMessage(kWhatResume, this))->post();
500}
501
502void NuPlayer::GenericSource::disconnect() {
503    sp<DataSource> dataSource, httpSource;
504    {
505        Mutex::Autolock _l(mDisconnectLock);
506        dataSource = mDataSource;
507        httpSource = mHttpSource;
508    }
509
510    if (dataSource != NULL) {
511        // disconnect data source
512        if (dataSource->flags() & DataSource::kIsCachingDataSource) {
513            static_cast<NuCachedSource2 *>(dataSource.get())->disconnect();
514        }
515    } else if (httpSource != NULL) {
516        static_cast<HTTPBase *>(httpSource.get())->disconnect();
517    }
518}
519
520void NuPlayer::GenericSource::setDrmPlaybackStatusIfNeeded(int playbackStatus, int64_t position) {
521    if (mDecryptHandle != NULL) {
522        mDrmManagerClient->setPlaybackStatus(mDecryptHandle, playbackStatus, position);
523    }
524    mSubtitleTrack.mPackets = new AnotherPacketSource(NULL);
525    mTimedTextTrack.mPackets = new AnotherPacketSource(NULL);
526}
527
528status_t NuPlayer::GenericSource::feedMoreTSData() {
529    return OK;
530}
531
532void NuPlayer::GenericSource::onMessageReceived(const sp<AMessage> &msg) {
533    switch (msg->what()) {
534      case kWhatPrepareAsync:
535      {
536          onPrepareAsync();
537          break;
538      }
539      case kWhatFetchSubtitleData:
540      {
541          fetchTextData(kWhatSendSubtitleData, MEDIA_TRACK_TYPE_SUBTITLE,
542                  mFetchSubtitleDataGeneration, mSubtitleTrack.mPackets, msg);
543          break;
544      }
545
546      case kWhatFetchTimedTextData:
547      {
548          fetchTextData(kWhatSendTimedTextData, MEDIA_TRACK_TYPE_TIMEDTEXT,
549                  mFetchTimedTextDataGeneration, mTimedTextTrack.mPackets, msg);
550          break;
551      }
552
553      case kWhatSendSubtitleData:
554      {
555          sendTextData(kWhatSubtitleData, MEDIA_TRACK_TYPE_SUBTITLE,
556                  mFetchSubtitleDataGeneration, mSubtitleTrack.mPackets, msg);
557          break;
558      }
559
560      case kWhatSendGlobalTimedTextData:
561      {
562          sendGlobalTextData(kWhatTimedTextData, mFetchTimedTextDataGeneration, msg);
563          break;
564      }
565      case kWhatSendTimedTextData:
566      {
567          sendTextData(kWhatTimedTextData, MEDIA_TRACK_TYPE_TIMEDTEXT,
568                  mFetchTimedTextDataGeneration, mTimedTextTrack.mPackets, msg);
569          break;
570      }
571
572      case kWhatChangeAVSource:
573      {
574          int32_t trackIndex;
575          CHECK(msg->findInt32("trackIndex", &trackIndex));
576          const sp<IMediaSource> source = mSources.itemAt(trackIndex);
577
578          Track* track;
579          const char *mime;
580          media_track_type trackType, counterpartType;
581          sp<MetaData> meta = source->getFormat();
582          meta->findCString(kKeyMIMEType, &mime);
583          if (!strncasecmp(mime, "audio/", 6)) {
584              track = &mAudioTrack;
585              trackType = MEDIA_TRACK_TYPE_AUDIO;
586              counterpartType = MEDIA_TRACK_TYPE_VIDEO;;
587          } else {
588              CHECK(!strncasecmp(mime, "video/", 6));
589              track = &mVideoTrack;
590              trackType = MEDIA_TRACK_TYPE_VIDEO;
591              counterpartType = MEDIA_TRACK_TYPE_AUDIO;;
592          }
593
594
595          if (track->mSource != NULL) {
596              track->mSource->stop();
597          }
598          track->mSource = source;
599          track->mSource->start();
600          track->mIndex = trackIndex;
601
602          int64_t timeUs, actualTimeUs;
603          const bool formatChange = true;
604          if (trackType == MEDIA_TRACK_TYPE_AUDIO) {
605              timeUs = mAudioLastDequeueTimeUs;
606          } else {
607              timeUs = mVideoLastDequeueTimeUs;
608          }
609          readBuffer(trackType, timeUs, MediaPlayerSeekMode::SEEK_PREVIOUS_SYNC /* mode */,
610                  &actualTimeUs, formatChange);
611          readBuffer(counterpartType, -1, MediaPlayerSeekMode::SEEK_PREVIOUS_SYNC /* mode */,
612                  NULL, !formatChange);
613          ALOGV("timeUs %lld actualTimeUs %lld", (long long)timeUs, (long long)actualTimeUs);
614
615          break;
616      }
617
618      case kWhatStart:
619      case kWhatResume:
620      {
621          mBufferingMonitor->restartPollBuffering();
622          break;
623      }
624
625      case kWhatGetFormat:
626      {
627          onGetFormatMeta(msg);
628          break;
629      }
630
631      case kWhatGetSelectedTrack:
632      {
633          onGetSelectedTrack(msg);
634          break;
635      }
636
637      case kWhatSelectTrack:
638      {
639          onSelectTrack(msg);
640          break;
641      }
642
643      case kWhatSeek:
644      {
645          onSeek(msg);
646          break;
647      }
648
649      case kWhatReadBuffer:
650      {
651          onReadBuffer(msg);
652          break;
653      }
654
655      case kWhatSecureDecodersInstantiated:
656      {
657          int32_t err;
658          CHECK(msg->findInt32("err", &err));
659          onSecureDecodersInstantiated(err);
660          break;
661      }
662
663      default:
664          Source::onMessageReceived(msg);
665          break;
666    }
667}
668
669void NuPlayer::GenericSource::fetchTextData(
670        uint32_t sendWhat,
671        media_track_type type,
672        int32_t curGen,
673        const sp<AnotherPacketSource>& packets,
674        const sp<AMessage>& msg) {
675    int32_t msgGeneration;
676    CHECK(msg->findInt32("generation", &msgGeneration));
677    if (msgGeneration != curGen) {
678        // stale
679        return;
680    }
681
682    int32_t avail;
683    if (packets->hasBufferAvailable(&avail)) {
684        return;
685    }
686
687    int64_t timeUs;
688    CHECK(msg->findInt64("timeUs", &timeUs));
689
690    int64_t subTimeUs;
691    readBuffer(type, timeUs, MediaPlayerSeekMode::SEEK_PREVIOUS_SYNC /* mode */, &subTimeUs);
692
693    int64_t delayUs = subTimeUs - timeUs;
694    if (msg->what() == kWhatFetchSubtitleData) {
695        const int64_t oneSecUs = 1000000ll;
696        delayUs -= oneSecUs;
697    }
698    sp<AMessage> msg2 = new AMessage(sendWhat, this);
699    msg2->setInt32("generation", msgGeneration);
700    msg2->post(delayUs < 0 ? 0 : delayUs);
701}
702
703void NuPlayer::GenericSource::sendTextData(
704        uint32_t what,
705        media_track_type type,
706        int32_t curGen,
707        const sp<AnotherPacketSource>& packets,
708        const sp<AMessage>& msg) {
709    int32_t msgGeneration;
710    CHECK(msg->findInt32("generation", &msgGeneration));
711    if (msgGeneration != curGen) {
712        // stale
713        return;
714    }
715
716    int64_t subTimeUs;
717    if (packets->nextBufferTime(&subTimeUs) != OK) {
718        return;
719    }
720
721    int64_t nextSubTimeUs;
722    readBuffer(type, -1, MediaPlayerSeekMode::SEEK_PREVIOUS_SYNC /* mode */, &nextSubTimeUs);
723
724    sp<ABuffer> buffer;
725    status_t dequeueStatus = packets->dequeueAccessUnit(&buffer);
726    if (dequeueStatus == OK) {
727        sp<AMessage> notify = dupNotify();
728        notify->setInt32("what", what);
729        notify->setBuffer("buffer", buffer);
730        notify->post();
731
732        const int64_t delayUs = nextSubTimeUs - subTimeUs;
733        msg->post(delayUs < 0 ? 0 : delayUs);
734    }
735}
736
737void NuPlayer::GenericSource::sendGlobalTextData(
738        uint32_t what,
739        int32_t curGen,
740        sp<AMessage> msg) {
741    int32_t msgGeneration;
742    CHECK(msg->findInt32("generation", &msgGeneration));
743    if (msgGeneration != curGen) {
744        // stale
745        return;
746    }
747
748    uint32_t textType;
749    const void *data;
750    size_t size = 0;
751    if (mTimedTextTrack.mSource->getFormat()->findData(
752                    kKeyTextFormatData, &textType, &data, &size)) {
753        mGlobalTimedText = new ABuffer(size);
754        if (mGlobalTimedText->data()) {
755            memcpy(mGlobalTimedText->data(), data, size);
756            sp<AMessage> globalMeta = mGlobalTimedText->meta();
757            globalMeta->setInt64("timeUs", 0);
758            globalMeta->setString("mime", MEDIA_MIMETYPE_TEXT_3GPP);
759            globalMeta->setInt32("global", 1);
760            sp<AMessage> notify = dupNotify();
761            notify->setInt32("what", what);
762            notify->setBuffer("buffer", mGlobalTimedText);
763            notify->post();
764        }
765    }
766}
767
768sp<MetaData> NuPlayer::GenericSource::getFormatMeta(bool audio) {
769    sp<AMessage> msg = new AMessage(kWhatGetFormat, this);
770    msg->setInt32("audio", audio);
771
772    sp<AMessage> response;
773    sp<RefBase> format;
774    status_t err = msg->postAndAwaitResponse(&response);
775    if (err == OK && response != NULL) {
776        CHECK(response->findObject("format", &format));
777        return static_cast<MetaData*>(format.get());
778    } else {
779        return NULL;
780    }
781}
782
783void NuPlayer::GenericSource::onGetFormatMeta(const sp<AMessage>& msg) const {
784    int32_t audio;
785    CHECK(msg->findInt32("audio", &audio));
786
787    sp<AMessage> response = new AMessage;
788    sp<MetaData> format = doGetFormatMeta(audio);
789    response->setObject("format", format);
790
791    sp<AReplyToken> replyID;
792    CHECK(msg->senderAwaitsResponse(&replyID));
793    response->postReply(replyID);
794}
795
796sp<MetaData> NuPlayer::GenericSource::doGetFormatMeta(bool audio) const {
797    sp<IMediaSource> source = audio ? mAudioTrack.mSource : mVideoTrack.mSource;
798
799    if (source == NULL) {
800        return NULL;
801    }
802
803    return source->getFormat();
804}
805
806status_t NuPlayer::GenericSource::dequeueAccessUnit(
807        bool audio, sp<ABuffer> *accessUnit) {
808    if (audio && !mStarted) {
809        return -EWOULDBLOCK;
810    }
811
812    Track *track = audio ? &mAudioTrack : &mVideoTrack;
813
814    if (track->mSource == NULL) {
815        return -EWOULDBLOCK;
816    }
817
818    status_t finalResult;
819    if (!track->mPackets->hasBufferAvailable(&finalResult)) {
820        if (finalResult == OK) {
821            postReadBuffer(
822                    audio ? MEDIA_TRACK_TYPE_AUDIO : MEDIA_TRACK_TYPE_VIDEO);
823            return -EWOULDBLOCK;
824        }
825        return finalResult;
826    }
827
828    status_t result = track->mPackets->dequeueAccessUnit(accessUnit);
829
830    // start pulling in more buffers if we only have one (or no) buffer left
831    // so that decoder has less chance of being starved
832    if (track->mPackets->getAvailableBufferCount(&finalResult) < 2) {
833        postReadBuffer(audio? MEDIA_TRACK_TYPE_AUDIO : MEDIA_TRACK_TYPE_VIDEO);
834    }
835
836    if (result != OK) {
837        if (mSubtitleTrack.mSource != NULL) {
838            mSubtitleTrack.mPackets->clear();
839            mFetchSubtitleDataGeneration++;
840        }
841        if (mTimedTextTrack.mSource != NULL) {
842            mTimedTextTrack.mPackets->clear();
843            mFetchTimedTextDataGeneration++;
844        }
845        return result;
846    }
847
848    int64_t timeUs;
849    status_t eosResult; // ignored
850    CHECK((*accessUnit)->meta()->findInt64("timeUs", &timeUs));
851    if (audio) {
852        mAudioLastDequeueTimeUs = timeUs;
853        mBufferingMonitor->updateDequeuedBufferTime(timeUs);
854    } else {
855        mVideoLastDequeueTimeUs = timeUs;
856    }
857
858    if (mSubtitleTrack.mSource != NULL
859            && !mSubtitleTrack.mPackets->hasBufferAvailable(&eosResult)) {
860        sp<AMessage> msg = new AMessage(kWhatFetchSubtitleData, this);
861        msg->setInt64("timeUs", timeUs);
862        msg->setInt32("generation", mFetchSubtitleDataGeneration);
863        msg->post();
864    }
865
866    if (mTimedTextTrack.mSource != NULL
867            && !mTimedTextTrack.mPackets->hasBufferAvailable(&eosResult)) {
868        sp<AMessage> msg = new AMessage(kWhatFetchTimedTextData, this);
869        msg->setInt64("timeUs", timeUs);
870        msg->setInt32("generation", mFetchTimedTextDataGeneration);
871        msg->post();
872    }
873
874    return result;
875}
876
877status_t NuPlayer::GenericSource::getDuration(int64_t *durationUs) {
878    *durationUs = mDurationUs;
879    return OK;
880}
881
882size_t NuPlayer::GenericSource::getTrackCount() const {
883    return mSources.size();
884}
885
886sp<AMessage> NuPlayer::GenericSource::getTrackInfo(size_t trackIndex) const {
887    size_t trackCount = mSources.size();
888    if (trackIndex >= trackCount) {
889        return NULL;
890    }
891
892    sp<AMessage> format = new AMessage();
893    sp<MetaData> meta = mSources.itemAt(trackIndex)->getFormat();
894    if (meta == NULL) {
895        ALOGE("no metadata for track %zu", trackIndex);
896        return NULL;
897    }
898
899    const char *mime;
900    CHECK(meta->findCString(kKeyMIMEType, &mime));
901    format->setString("mime", mime);
902
903    int32_t trackType;
904    if (!strncasecmp(mime, "video/", 6)) {
905        trackType = MEDIA_TRACK_TYPE_VIDEO;
906    } else if (!strncasecmp(mime, "audio/", 6)) {
907        trackType = MEDIA_TRACK_TYPE_AUDIO;
908    } else if (!strcasecmp(mime, MEDIA_MIMETYPE_TEXT_3GPP)) {
909        trackType = MEDIA_TRACK_TYPE_TIMEDTEXT;
910    } else {
911        trackType = MEDIA_TRACK_TYPE_UNKNOWN;
912    }
913    format->setInt32("type", trackType);
914
915    const char *lang;
916    if (!meta->findCString(kKeyMediaLanguage, &lang)) {
917        lang = "und";
918    }
919    format->setString("language", lang);
920
921    if (trackType == MEDIA_TRACK_TYPE_SUBTITLE) {
922        int32_t isAutoselect = 1, isDefault = 0, isForced = 0;
923        meta->findInt32(kKeyTrackIsAutoselect, &isAutoselect);
924        meta->findInt32(kKeyTrackIsDefault, &isDefault);
925        meta->findInt32(kKeyTrackIsForced, &isForced);
926
927        format->setInt32("auto", !!isAutoselect);
928        format->setInt32("default", !!isDefault);
929        format->setInt32("forced", !!isForced);
930    }
931
932    return format;
933}
934
935ssize_t NuPlayer::GenericSource::getSelectedTrack(media_track_type type) const {
936    sp<AMessage> msg = new AMessage(kWhatGetSelectedTrack, this);
937    msg->setInt32("type", type);
938
939    sp<AMessage> response;
940    int32_t index;
941    status_t err = msg->postAndAwaitResponse(&response);
942    if (err == OK && response != NULL) {
943        CHECK(response->findInt32("index", &index));
944        return index;
945    } else {
946        return -1;
947    }
948}
949
950void NuPlayer::GenericSource::onGetSelectedTrack(const sp<AMessage>& msg) const {
951    int32_t tmpType;
952    CHECK(msg->findInt32("type", &tmpType));
953    media_track_type type = (media_track_type)tmpType;
954
955    sp<AMessage> response = new AMessage;
956    ssize_t index = doGetSelectedTrack(type);
957    response->setInt32("index", index);
958
959    sp<AReplyToken> replyID;
960    CHECK(msg->senderAwaitsResponse(&replyID));
961    response->postReply(replyID);
962}
963
964ssize_t NuPlayer::GenericSource::doGetSelectedTrack(media_track_type type) const {
965    const Track *track = NULL;
966    switch (type) {
967    case MEDIA_TRACK_TYPE_VIDEO:
968        track = &mVideoTrack;
969        break;
970    case MEDIA_TRACK_TYPE_AUDIO:
971        track = &mAudioTrack;
972        break;
973    case MEDIA_TRACK_TYPE_TIMEDTEXT:
974        track = &mTimedTextTrack;
975        break;
976    case MEDIA_TRACK_TYPE_SUBTITLE:
977        track = &mSubtitleTrack;
978        break;
979    default:
980        break;
981    }
982
983    if (track != NULL && track->mSource != NULL) {
984        return track->mIndex;
985    }
986
987    return -1;
988}
989
990status_t NuPlayer::GenericSource::selectTrack(size_t trackIndex, bool select, int64_t timeUs) {
991    ALOGV("%s track: %zu", select ? "select" : "deselect", trackIndex);
992    sp<AMessage> msg = new AMessage(kWhatSelectTrack, this);
993    msg->setInt32("trackIndex", trackIndex);
994    msg->setInt32("select", select);
995    msg->setInt64("timeUs", timeUs);
996
997    sp<AMessage> response;
998    status_t err = msg->postAndAwaitResponse(&response);
999    if (err == OK && response != NULL) {
1000        CHECK(response->findInt32("err", &err));
1001    }
1002
1003    return err;
1004}
1005
1006void NuPlayer::GenericSource::onSelectTrack(const sp<AMessage>& msg) {
1007    int32_t trackIndex, select;
1008    int64_t timeUs;
1009    CHECK(msg->findInt32("trackIndex", &trackIndex));
1010    CHECK(msg->findInt32("select", &select));
1011    CHECK(msg->findInt64("timeUs", &timeUs));
1012
1013    sp<AMessage> response = new AMessage;
1014    status_t err = doSelectTrack(trackIndex, select, timeUs);
1015    response->setInt32("err", err);
1016
1017    sp<AReplyToken> replyID;
1018    CHECK(msg->senderAwaitsResponse(&replyID));
1019    response->postReply(replyID);
1020}
1021
1022status_t NuPlayer::GenericSource::doSelectTrack(size_t trackIndex, bool select, int64_t timeUs) {
1023    if (trackIndex >= mSources.size()) {
1024        return BAD_INDEX;
1025    }
1026
1027    if (!select) {
1028        Track* track = NULL;
1029        if (mSubtitleTrack.mSource != NULL && trackIndex == mSubtitleTrack.mIndex) {
1030            track = &mSubtitleTrack;
1031            mFetchSubtitleDataGeneration++;
1032        } else if (mTimedTextTrack.mSource != NULL && trackIndex == mTimedTextTrack.mIndex) {
1033            track = &mTimedTextTrack;
1034            mFetchTimedTextDataGeneration++;
1035        }
1036        if (track == NULL) {
1037            return INVALID_OPERATION;
1038        }
1039        track->mSource->stop();
1040        track->mSource = NULL;
1041        track->mPackets->clear();
1042        return OK;
1043    }
1044
1045    const sp<IMediaSource> source = mSources.itemAt(trackIndex);
1046    sp<MetaData> meta = source->getFormat();
1047    const char *mime;
1048    CHECK(meta->findCString(kKeyMIMEType, &mime));
1049    if (!strncasecmp(mime, "text/", 5)) {
1050        bool isSubtitle = strcasecmp(mime, MEDIA_MIMETYPE_TEXT_3GPP);
1051        Track *track = isSubtitle ? &mSubtitleTrack : &mTimedTextTrack;
1052        if (track->mSource != NULL && track->mIndex == trackIndex) {
1053            return OK;
1054        }
1055        track->mIndex = trackIndex;
1056        if (track->mSource != NULL) {
1057            track->mSource->stop();
1058        }
1059        track->mSource = mSources.itemAt(trackIndex);
1060        track->mSource->start();
1061        if (track->mPackets == NULL) {
1062            track->mPackets = new AnotherPacketSource(track->mSource->getFormat());
1063        } else {
1064            track->mPackets->clear();
1065            track->mPackets->setFormat(track->mSource->getFormat());
1066
1067        }
1068
1069        if (isSubtitle) {
1070            mFetchSubtitleDataGeneration++;
1071        } else {
1072            mFetchTimedTextDataGeneration++;
1073        }
1074
1075        status_t eosResult; // ignored
1076        if (mSubtitleTrack.mSource != NULL
1077                && !mSubtitleTrack.mPackets->hasBufferAvailable(&eosResult)) {
1078            sp<AMessage> msg = new AMessage(kWhatFetchSubtitleData, this);
1079            msg->setInt64("timeUs", timeUs);
1080            msg->setInt32("generation", mFetchSubtitleDataGeneration);
1081            msg->post();
1082        }
1083
1084        sp<AMessage> msg2 = new AMessage(kWhatSendGlobalTimedTextData, this);
1085        msg2->setInt32("generation", mFetchTimedTextDataGeneration);
1086        msg2->post();
1087
1088        if (mTimedTextTrack.mSource != NULL
1089                && !mTimedTextTrack.mPackets->hasBufferAvailable(&eosResult)) {
1090            sp<AMessage> msg = new AMessage(kWhatFetchTimedTextData, this);
1091            msg->setInt64("timeUs", timeUs);
1092            msg->setInt32("generation", mFetchTimedTextDataGeneration);
1093            msg->post();
1094        }
1095
1096        return OK;
1097    } else if (!strncasecmp(mime, "audio/", 6) || !strncasecmp(mime, "video/", 6)) {
1098        bool audio = !strncasecmp(mime, "audio/", 6);
1099        Track *track = audio ? &mAudioTrack : &mVideoTrack;
1100        if (track->mSource != NULL && track->mIndex == trackIndex) {
1101            return OK;
1102        }
1103
1104        sp<AMessage> msg = new AMessage(kWhatChangeAVSource, this);
1105        msg->setInt32("trackIndex", trackIndex);
1106        msg->post();
1107        return OK;
1108    }
1109
1110    return INVALID_OPERATION;
1111}
1112
1113status_t NuPlayer::GenericSource::seekTo(int64_t seekTimeUs, MediaPlayerSeekMode mode) {
1114    sp<AMessage> msg = new AMessage(kWhatSeek, this);
1115    msg->setInt64("seekTimeUs", seekTimeUs);
1116    msg->setInt32("mode", mode);
1117
1118    sp<AMessage> response;
1119    status_t err = msg->postAndAwaitResponse(&response);
1120    if (err == OK && response != NULL) {
1121        CHECK(response->findInt32("err", &err));
1122    }
1123
1124    return err;
1125}
1126
1127void NuPlayer::GenericSource::onSeek(const sp<AMessage>& msg) {
1128    int64_t seekTimeUs;
1129    int32_t mode;
1130    CHECK(msg->findInt64("seekTimeUs", &seekTimeUs));
1131    CHECK(msg->findInt32("mode", &mode));
1132
1133    sp<AMessage> response = new AMessage;
1134    status_t err = doSeek(seekTimeUs, (MediaPlayerSeekMode)mode);
1135    response->setInt32("err", err);
1136
1137    sp<AReplyToken> replyID;
1138    CHECK(msg->senderAwaitsResponse(&replyID));
1139    response->postReply(replyID);
1140}
1141
1142status_t NuPlayer::GenericSource::doSeek(int64_t seekTimeUs, MediaPlayerSeekMode mode) {
1143    mBufferingMonitor->updateDequeuedBufferTime(-1ll);
1144
1145    // If the Widevine source is stopped, do not attempt to read any
1146    // more buffers.
1147    //
1148    // TODO: revisit after widevine is removed.  May be able to
1149    // combine mStopRead with mStarted.
1150    if (mStopRead) {
1151        return INVALID_OPERATION;
1152    }
1153    if (mVideoTrack.mSource != NULL) {
1154        int64_t actualTimeUs;
1155        readBuffer(MEDIA_TRACK_TYPE_VIDEO, seekTimeUs, mode, &actualTimeUs);
1156
1157        if (mode != MediaPlayerSeekMode::SEEK_CLOSEST) {
1158            seekTimeUs = actualTimeUs;
1159        }
1160        mVideoLastDequeueTimeUs = actualTimeUs;
1161    }
1162
1163    if (mAudioTrack.mSource != NULL) {
1164        readBuffer(MEDIA_TRACK_TYPE_AUDIO, seekTimeUs);
1165        mAudioLastDequeueTimeUs = seekTimeUs;
1166    }
1167
1168    setDrmPlaybackStatusIfNeeded(Playback::START, seekTimeUs / 1000);
1169    if (!mStarted) {
1170        setDrmPlaybackStatusIfNeeded(Playback::PAUSE, 0);
1171    }
1172
1173    // If currently buffering, post kWhatBufferingEnd first, so that
1174    // NuPlayer resumes. Otherwise, if cache hits high watermark
1175    // before new polling happens, no one will resume the playback.
1176    mBufferingMonitor->stopBufferingIfNecessary();
1177    mBufferingMonitor->restartPollBuffering();
1178
1179    return OK;
1180}
1181
1182sp<ABuffer> NuPlayer::GenericSource::mediaBufferToABuffer(
1183        MediaBuffer* mb,
1184        media_track_type trackType) {
1185    bool audio = trackType == MEDIA_TRACK_TYPE_AUDIO;
1186    size_t outLength = mb->range_length();
1187
1188    if (audio && mAudioIsVorbis) {
1189        outLength += sizeof(int32_t);
1190    }
1191
1192    sp<ABuffer> ab;
1193    if (mIsSecure && !audio) {
1194        // data is already provided in the buffer
1195        ab = new ABuffer(NULL, mb->range_length());
1196        mb->add_ref();
1197        ab->setMediaBufferBase(mb);
1198    } else {
1199        ab = new ABuffer(outLength);
1200        memcpy(ab->data(),
1201               (const uint8_t *)mb->data() + mb->range_offset(),
1202               mb->range_length());
1203    }
1204
1205    if (audio && mAudioIsVorbis) {
1206        int32_t numPageSamples;
1207        if (!mb->meta_data()->findInt32(kKeyValidSamples, &numPageSamples)) {
1208            numPageSamples = -1;
1209        }
1210
1211        uint8_t* abEnd = ab->data() + mb->range_length();
1212        memcpy(abEnd, &numPageSamples, sizeof(numPageSamples));
1213    }
1214
1215    sp<AMessage> meta = ab->meta();
1216
1217    int64_t timeUs;
1218    CHECK(mb->meta_data()->findInt64(kKeyTime, &timeUs));
1219    meta->setInt64("timeUs", timeUs);
1220
1221    if (trackType == MEDIA_TRACK_TYPE_VIDEO) {
1222        int32_t layerId;
1223        if (mb->meta_data()->findInt32(kKeyTemporalLayerId, &layerId)) {
1224            meta->setInt32("temporal-layer-id", layerId);
1225        }
1226    }
1227
1228    if (trackType == MEDIA_TRACK_TYPE_TIMEDTEXT) {
1229        const char *mime;
1230        CHECK(mTimedTextTrack.mSource != NULL
1231                && mTimedTextTrack.mSource->getFormat()->findCString(kKeyMIMEType, &mime));
1232        meta->setString("mime", mime);
1233    }
1234
1235    int64_t durationUs;
1236    if (mb->meta_data()->findInt64(kKeyDuration, &durationUs)) {
1237        meta->setInt64("durationUs", durationUs);
1238    }
1239
1240    if (trackType == MEDIA_TRACK_TYPE_SUBTITLE) {
1241        meta->setInt32("trackIndex", mSubtitleTrack.mIndex);
1242    }
1243
1244    uint32_t dataType; // unused
1245    const void *seiData;
1246    size_t seiLength;
1247    if (mb->meta_data()->findData(kKeySEI, &dataType, &seiData, &seiLength)) {
1248        sp<ABuffer> sei = ABuffer::CreateAsCopy(seiData, seiLength);;
1249        meta->setBuffer("sei", sei);
1250    }
1251
1252    const void *mpegUserDataPointer;
1253    size_t mpegUserDataLength;
1254    if (mb->meta_data()->findData(
1255            kKeyMpegUserData, &dataType, &mpegUserDataPointer, &mpegUserDataLength)) {
1256        sp<ABuffer> mpegUserData = ABuffer::CreateAsCopy(mpegUserDataPointer, mpegUserDataLength);
1257        meta->setBuffer("mpegUserData", mpegUserData);
1258    }
1259
1260    mb->release();
1261    mb = NULL;
1262
1263    return ab;
1264}
1265
1266void NuPlayer::GenericSource::postReadBuffer(media_track_type trackType) {
1267    Mutex::Autolock _l(mReadBufferLock);
1268
1269    if ((mPendingReadBufferTypes & (1 << trackType)) == 0) {
1270        mPendingReadBufferTypes |= (1 << trackType);
1271        sp<AMessage> msg = new AMessage(kWhatReadBuffer, this);
1272        msg->setInt32("trackType", trackType);
1273        msg->post();
1274    }
1275}
1276
1277void NuPlayer::GenericSource::onReadBuffer(const sp<AMessage>& msg) {
1278    int32_t tmpType;
1279    CHECK(msg->findInt32("trackType", &tmpType));
1280    media_track_type trackType = (media_track_type)tmpType;
1281    readBuffer(trackType);
1282    {
1283        // only protect the variable change, as readBuffer may
1284        // take considerable time.
1285        Mutex::Autolock _l(mReadBufferLock);
1286        mPendingReadBufferTypes &= ~(1 << trackType);
1287    }
1288}
1289
1290void NuPlayer::GenericSource::readBuffer(
1291        media_track_type trackType, int64_t seekTimeUs, MediaPlayerSeekMode mode,
1292        int64_t *actualTimeUs, bool formatChange) {
1293    // Do not read data if Widevine source is stopped
1294    //
1295    // TODO: revisit after widevine is removed.  May be able to
1296    // combine mStopRead with mStarted.
1297    if (mStopRead) {
1298        return;
1299    }
1300    Track *track;
1301    size_t maxBuffers = 1;
1302    switch (trackType) {
1303        case MEDIA_TRACK_TYPE_VIDEO:
1304            track = &mVideoTrack;
1305            maxBuffers = 8;  // too large of a number may influence seeks
1306            break;
1307        case MEDIA_TRACK_TYPE_AUDIO:
1308            track = &mAudioTrack;
1309            maxBuffers = 64;
1310            break;
1311        case MEDIA_TRACK_TYPE_SUBTITLE:
1312            track = &mSubtitleTrack;
1313            break;
1314        case MEDIA_TRACK_TYPE_TIMEDTEXT:
1315            track = &mTimedTextTrack;
1316            break;
1317        default:
1318            TRESPASS();
1319    }
1320
1321    if (track->mSource == NULL) {
1322        return;
1323    }
1324
1325    if (actualTimeUs) {
1326        *actualTimeUs = seekTimeUs;
1327    }
1328
1329    MediaSource::ReadOptions options;
1330
1331    bool seeking = false;
1332    if (seekTimeUs >= 0) {
1333        options.setSeekTo(seekTimeUs, mode);
1334        seeking = true;
1335    }
1336
1337    const bool couldReadMultiple = (track->mSource->supportReadMultiple());
1338
1339    if (couldReadMultiple) {
1340        options.setNonBlocking();
1341    }
1342
1343    for (size_t numBuffers = 0; numBuffers < maxBuffers; ) {
1344        Vector<MediaBuffer *> mediaBuffers;
1345        status_t err = NO_ERROR;
1346
1347        if (couldReadMultiple) {
1348            err = track->mSource->readMultiple(
1349                    &mediaBuffers, maxBuffers - numBuffers, &options);
1350        } else {
1351            MediaBuffer *mbuf = NULL;
1352            err = track->mSource->read(&mbuf, &options);
1353            if (err == OK && mbuf != NULL) {
1354                mediaBuffers.push_back(mbuf);
1355            }
1356        }
1357
1358        options.clearNonPersistent();
1359
1360        size_t id = 0;
1361        size_t count = mediaBuffers.size();
1362        for (; id < count; ++id) {
1363            int64_t timeUs;
1364            MediaBuffer *mbuf = mediaBuffers[id];
1365            if (!mbuf->meta_data()->findInt64(kKeyTime, &timeUs)) {
1366                mbuf->meta_data()->dumpToLog();
1367                track->mPackets->signalEOS(ERROR_MALFORMED);
1368                break;
1369            }
1370            if (trackType == MEDIA_TRACK_TYPE_AUDIO) {
1371                mAudioTimeUs = timeUs;
1372                mBufferingMonitor->updateQueuedTime(true /* isAudio */, timeUs);
1373            } else if (trackType == MEDIA_TRACK_TYPE_VIDEO) {
1374                mVideoTimeUs = timeUs;
1375                mBufferingMonitor->updateQueuedTime(false /* isAudio */, timeUs);
1376            }
1377
1378            queueDiscontinuityIfNeeded(seeking, formatChange, trackType, track);
1379
1380            sp<ABuffer> buffer = mediaBufferToABuffer(mbuf, trackType);
1381            if (numBuffers == 0 && actualTimeUs != nullptr) {
1382                *actualTimeUs = timeUs;
1383            }
1384            if (seeking && buffer != nullptr) {
1385                sp<AMessage> meta = buffer->meta();
1386                if (meta != nullptr && mode == MediaPlayerSeekMode::SEEK_CLOSEST
1387                        && seekTimeUs > timeUs) {
1388                    sp<AMessage> extra = new AMessage;
1389                    extra->setInt64("resume-at-mediaTimeUs", seekTimeUs);
1390                    meta->setMessage("extra", extra);
1391                }
1392            }
1393
1394            track->mPackets->queueAccessUnit(buffer);
1395            formatChange = false;
1396            seeking = false;
1397            ++numBuffers;
1398        }
1399        if (id < count) {
1400            // Error, some mediaBuffer doesn't have kKeyTime.
1401            for (; id < count; ++id) {
1402                mediaBuffers[id]->release();
1403            }
1404            break;
1405        }
1406
1407        if (err == WOULD_BLOCK) {
1408            break;
1409        } else if (err == INFO_FORMAT_CHANGED) {
1410#if 0
1411            track->mPackets->queueDiscontinuity(
1412                    ATSParser::DISCONTINUITY_FORMATCHANGE,
1413                    NULL,
1414                    false /* discard */);
1415#endif
1416        } else if (err != OK) {
1417            queueDiscontinuityIfNeeded(seeking, formatChange, trackType, track);
1418            track->mPackets->signalEOS(err);
1419            break;
1420        }
1421    }
1422}
1423
1424void NuPlayer::GenericSource::queueDiscontinuityIfNeeded(
1425        bool seeking, bool formatChange, media_track_type trackType, Track *track) {
1426    // formatChange && seeking: track whose source is changed during selection
1427    // formatChange && !seeking: track whose source is not changed during selection
1428    // !formatChange: normal seek
1429    if ((seeking || formatChange)
1430            && (trackType == MEDIA_TRACK_TYPE_AUDIO
1431            || trackType == MEDIA_TRACK_TYPE_VIDEO)) {
1432        ATSParser::DiscontinuityType type = (formatChange && seeking)
1433                ? ATSParser::DISCONTINUITY_FORMATCHANGE
1434                : ATSParser::DISCONTINUITY_NONE;
1435        track->mPackets->queueDiscontinuity(type, NULL /* extra */, true /* discard */);
1436    }
1437}
1438
1439NuPlayer::GenericSource::BufferingMonitor::BufferingMonitor(const sp<AMessage> &notify)
1440    : mNotify(notify),
1441      mDurationUs(-1ll),
1442      mBitrate(-1ll),
1443      mIsStreaming(false),
1444      mAudioTimeUs(0),
1445      mVideoTimeUs(0),
1446      mPollBufferingGeneration(0),
1447      mPrepareBuffering(false),
1448      mBuffering(false),
1449      mPrevBufferPercentage(-1),
1450      mOffloadAudio(false),
1451      mFirstDequeuedBufferRealUs(-1ll),
1452      mFirstDequeuedBufferMediaUs(-1ll),
1453      mlastDequeuedBufferMediaUs(-1ll) {
1454}
1455
1456NuPlayer::GenericSource::BufferingMonitor::~BufferingMonitor() {
1457}
1458
1459void NuPlayer::GenericSource::BufferingMonitor::prepare(
1460        const sp<NuCachedSource2> &cachedSource,
1461        int64_t durationUs,
1462        int64_t bitrate,
1463        bool isStreaming) {
1464    Mutex::Autolock _l(mLock);
1465    prepare_l(cachedSource, durationUs, bitrate, isStreaming);
1466}
1467
1468void NuPlayer::GenericSource::BufferingMonitor::stop() {
1469    Mutex::Autolock _l(mLock);
1470    prepare_l(NULL /* cachedSource */, -1 /* durationUs */,
1471            -1 /* bitrate */, false /* isStreaming */);
1472}
1473
1474void NuPlayer::GenericSource::BufferingMonitor::cancelPollBuffering() {
1475    Mutex::Autolock _l(mLock);
1476    cancelPollBuffering_l();
1477}
1478
1479void NuPlayer::GenericSource::BufferingMonitor::restartPollBuffering() {
1480    Mutex::Autolock _l(mLock);
1481    if (mIsStreaming) {
1482        cancelPollBuffering_l();
1483        onPollBuffering_l();
1484    }
1485}
1486
1487void NuPlayer::GenericSource::BufferingMonitor::stopBufferingIfNecessary() {
1488    Mutex::Autolock _l(mLock);
1489    stopBufferingIfNecessary_l();
1490}
1491
1492void NuPlayer::GenericSource::BufferingMonitor::ensureCacheIsFetching() {
1493    Mutex::Autolock _l(mLock);
1494    ensureCacheIsFetching_l();
1495}
1496
1497void NuPlayer::GenericSource::BufferingMonitor::updateQueuedTime(bool isAudio, int64_t timeUs) {
1498    Mutex::Autolock _l(mLock);
1499    if (isAudio) {
1500        mAudioTimeUs = timeUs;
1501    } else {
1502        mVideoTimeUs = timeUs;
1503    }
1504}
1505
1506void NuPlayer::GenericSource::BufferingMonitor::setOffloadAudio(bool offload) {
1507    Mutex::Autolock _l(mLock);
1508    mOffloadAudio = offload;
1509}
1510
1511void NuPlayer::GenericSource::BufferingMonitor::updateDequeuedBufferTime(int64_t mediaUs) {
1512    Mutex::Autolock _l(mLock);
1513    if (mediaUs < 0) {
1514        mFirstDequeuedBufferRealUs = -1ll;
1515        mFirstDequeuedBufferMediaUs = -1ll;
1516    } else if (mFirstDequeuedBufferRealUs < 0) {
1517        mFirstDequeuedBufferRealUs = ALooper::GetNowUs();
1518        mFirstDequeuedBufferMediaUs = mediaUs;
1519    }
1520    mlastDequeuedBufferMediaUs = mediaUs;
1521}
1522
1523void NuPlayer::GenericSource::BufferingMonitor::prepare_l(
1524        const sp<NuCachedSource2> &cachedSource,
1525        int64_t durationUs,
1526        int64_t bitrate,
1527        bool isStreaming) {
1528
1529    mCachedSource = cachedSource;
1530    mDurationUs = durationUs;
1531    mBitrate = bitrate;
1532    mIsStreaming = isStreaming;
1533    mAudioTimeUs = 0;
1534    mVideoTimeUs = 0;
1535    mPrepareBuffering = (cachedSource != NULL);
1536    cancelPollBuffering_l();
1537    mOffloadAudio = false;
1538    mFirstDequeuedBufferRealUs = -1ll;
1539    mFirstDequeuedBufferMediaUs = -1ll;
1540    mlastDequeuedBufferMediaUs = -1ll;
1541}
1542
1543void NuPlayer::GenericSource::BufferingMonitor::cancelPollBuffering_l() {
1544    mBuffering = false;
1545    ++mPollBufferingGeneration;
1546    mPrevBufferPercentage = -1;
1547}
1548
1549void NuPlayer::GenericSource::BufferingMonitor::notifyBufferingUpdate_l(int32_t percentage) {
1550    // Buffering percent could go backward as it's estimated from remaining
1551    // data and last access time. This could cause the buffering position
1552    // drawn on media control to jitter slightly. Remember previously reported
1553    // percentage and don't allow it to go backward.
1554    if (percentage < mPrevBufferPercentage) {
1555        percentage = mPrevBufferPercentage;
1556    } else if (percentage > 100) {
1557        percentage = 100;
1558    }
1559
1560    mPrevBufferPercentage = percentage;
1561
1562    ALOGV("notifyBufferingUpdate_l: buffering %d%%", percentage);
1563
1564    sp<AMessage> msg = mNotify->dup();
1565    msg->setInt32("what", kWhatBufferingUpdate);
1566    msg->setInt32("percentage", percentage);
1567    msg->post();
1568}
1569
1570void NuPlayer::GenericSource::BufferingMonitor::startBufferingIfNecessary_l() {
1571    if (mPrepareBuffering) {
1572        return;
1573    }
1574
1575    if (!mBuffering) {
1576        ALOGD("startBufferingIfNecessary_l");
1577
1578        mBuffering = true;
1579
1580        ensureCacheIsFetching_l();
1581        sendCacheStats_l();
1582
1583        sp<AMessage> notify = mNotify->dup();
1584        notify->setInt32("what", kWhatPauseOnBufferingStart);
1585        notify->post();
1586    }
1587}
1588
1589void NuPlayer::GenericSource::BufferingMonitor::stopBufferingIfNecessary_l() {
1590    if (mPrepareBuffering) {
1591        ALOGD("stopBufferingIfNecessary_l, mBuffering=%d", mBuffering);
1592
1593        mPrepareBuffering = false;
1594
1595        sp<AMessage> notify = mNotify->dup();
1596        notify->setInt32("what", kWhatPrepared);
1597        notify->setInt32("err", OK);
1598        notify->post();
1599
1600        return;
1601    }
1602
1603    if (mBuffering) {
1604        ALOGD("stopBufferingIfNecessary_l");
1605        mBuffering = false;
1606
1607        sendCacheStats_l();
1608
1609        sp<AMessage> notify = mNotify->dup();
1610        notify->setInt32("what", kWhatResumeOnBufferingEnd);
1611        notify->post();
1612    }
1613}
1614
1615void NuPlayer::GenericSource::BufferingMonitor::sendCacheStats_l() {
1616    int32_t kbps = 0;
1617    status_t err = UNKNOWN_ERROR;
1618
1619    if (mCachedSource != NULL) {
1620        err = mCachedSource->getEstimatedBandwidthKbps(&kbps);
1621    }
1622
1623    if (err == OK) {
1624        sp<AMessage> notify = mNotify->dup();
1625        notify->setInt32("what", kWhatCacheStats);
1626        notify->setInt32("bandwidth", kbps);
1627        notify->post();
1628    }
1629}
1630
1631void NuPlayer::GenericSource::BufferingMonitor::ensureCacheIsFetching_l() {
1632    if (mCachedSource != NULL) {
1633        mCachedSource->resumeFetchingIfNecessary();
1634    }
1635}
1636
1637void NuPlayer::GenericSource::BufferingMonitor::schedulePollBuffering_l() {
1638    sp<AMessage> msg = new AMessage(kWhatPollBuffering, this);
1639    msg->setInt32("generation", mPollBufferingGeneration);
1640    // Enquires buffering status every second.
1641    msg->post(1000000ll);
1642}
1643
1644int64_t NuPlayer::GenericSource::BufferingMonitor::getLastReadPosition_l() {
1645    if (mAudioTimeUs > 0) {
1646        return mAudioTimeUs;
1647    } else if (mVideoTimeUs > 0) {
1648        return mVideoTimeUs;
1649    } else {
1650        return 0;
1651    }
1652}
1653
1654void NuPlayer::GenericSource::BufferingMonitor::onPollBuffering_l() {
1655    status_t finalStatus = UNKNOWN_ERROR;
1656    int64_t cachedDurationUs = -1ll;
1657    ssize_t cachedDataRemaining = -1;
1658
1659    if (mCachedSource != NULL) {
1660        cachedDataRemaining =
1661                mCachedSource->approxDataRemaining(&finalStatus);
1662
1663        if (finalStatus == OK) {
1664            off64_t size;
1665            int64_t bitrate = 0ll;
1666            if (mDurationUs > 0 && mCachedSource->getSize(&size) == OK) {
1667                // |bitrate| uses bits/second unit, while size is number of bytes.
1668                bitrate = size * 8000000ll / mDurationUs;
1669            } else if (mBitrate > 0) {
1670                bitrate = mBitrate;
1671            }
1672            if (bitrate > 0) {
1673                cachedDurationUs = cachedDataRemaining * 8000000ll / bitrate;
1674            }
1675        }
1676    }
1677
1678    if (finalStatus != OK) {
1679        ALOGV("onPollBuffering_l: EOS (finalStatus = %d)", finalStatus);
1680
1681        if (finalStatus == ERROR_END_OF_STREAM) {
1682            notifyBufferingUpdate_l(100);
1683        }
1684
1685        stopBufferingIfNecessary_l();
1686        return;
1687    } else if (cachedDurationUs >= 0ll) {
1688        if (mDurationUs > 0ll) {
1689            int64_t cachedPosUs = getLastReadPosition_l() + cachedDurationUs;
1690            int percentage = 100.0 * cachedPosUs / mDurationUs;
1691            if (percentage > 100) {
1692                percentage = 100;
1693            }
1694
1695            notifyBufferingUpdate_l(percentage);
1696        }
1697
1698        ALOGV("onPollBuffering_l: cachedDurationUs %.1f sec",
1699                cachedDurationUs / 1000000.0f);
1700
1701        if (cachedDurationUs < kLowWaterMarkUs) {
1702            // Take into account the data cached in downstream components to try to avoid
1703            // unnecessary pause.
1704            if (mOffloadAudio && mFirstDequeuedBufferRealUs >= 0) {
1705                int64_t downStreamCacheUs = mlastDequeuedBufferMediaUs - mFirstDequeuedBufferMediaUs
1706                        - (ALooper::GetNowUs() - mFirstDequeuedBufferRealUs);
1707                if (downStreamCacheUs > 0) {
1708                    cachedDurationUs += downStreamCacheUs;
1709                }
1710            }
1711
1712            if (cachedDurationUs < kLowWaterMarkUs) {
1713                startBufferingIfNecessary_l();
1714            }
1715        } else {
1716            int64_t highWaterMark = mPrepareBuffering ? kHighWaterMarkUs : kHighWaterMarkRebufferUs;
1717            if (cachedDurationUs > highWaterMark) {
1718                stopBufferingIfNecessary_l();
1719            }
1720        }
1721    } else if (cachedDataRemaining >= 0) {
1722        ALOGV("onPollBuffering_l: cachedDataRemaining %zd bytes",
1723                cachedDataRemaining);
1724
1725        if (cachedDataRemaining < kLowWaterMarkBytes) {
1726            startBufferingIfNecessary_l();
1727        } else if (cachedDataRemaining > kHighWaterMarkBytes) {
1728            stopBufferingIfNecessary_l();
1729        }
1730    }
1731
1732    schedulePollBuffering_l();
1733}
1734
1735void NuPlayer::GenericSource::BufferingMonitor::onMessageReceived(const sp<AMessage> &msg) {
1736    switch (msg->what()) {
1737      case kWhatPollBuffering:
1738      {
1739          int32_t generation;
1740          CHECK(msg->findInt32("generation", &generation));
1741          Mutex::Autolock _l(mLock);
1742          if (generation == mPollBufferingGeneration) {
1743              onPollBuffering_l();
1744          }
1745          break;
1746      }
1747      default:
1748          TRESPASS();
1749          break;
1750    }
1751}
1752
1753}  // namespace android
1754