GenericSource.cpp revision 48fa06d1e80a872c7495804979256e021e566ae0 
1/*
2 * Copyright (C) 2012 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17//#define LOG_NDEBUG 0
18#define LOG_TAG "GenericSource"
19
20#include "GenericSource.h"
21
22#include "AnotherPacketSource.h"
23
24#include <media/IMediaHTTPService.h>
25#include <media/stagefright/foundation/ABuffer.h>
26#include <media/stagefright/foundation/ADebug.h>
27#include <media/stagefright/foundation/AMessage.h>
28#include <media/stagefright/DataSource.h>
29#include <media/stagefright/FileSource.h>
30#include <media/stagefright/MediaBuffer.h>
31#include <media/stagefright/MediaDefs.h>
32#include <media/stagefright/MediaExtractor.h>
33#include <media/stagefright/MediaSource.h>
34#include <media/stagefright/MetaData.h>
35#include <media/stagefright/Utils.h>
36#include "../../libstagefright/include/NuCachedSource2.h"
37#include "../../libstagefright/include/HTTPBase.h"
38
39namespace android {
40
41static const int kLowWaterMarkMs          = 2000;  // 2secs
42static const int kHighWaterMarkMs         = 5000;  // 5secs
43static const int kHighWaterMarkRebufferMs = 15000;  // 15secs
44
45static const int kLowWaterMarkKB  = 40;
46static const int kHighWaterMarkKB = 200;
47
48NuPlayer::GenericSource::GenericSource(
49        const sp<AMessage> &notify,
50        bool uidValid,
51        uid_t uid)
52    : Source(notify),
53      mAudioTimeUs(0),
54      mAudioLastDequeueTimeUs(0),
55      mVideoTimeUs(0),
56      mVideoLastDequeueTimeUs(0),
57      mFetchSubtitleDataGeneration(0),
58      mFetchTimedTextDataGeneration(0),
59      mDurationUs(-1ll),
60      mAudioIsVorbis(false),
61      mIsSecure(false),
62      mIsStreaming(false),
63      mUIDValid(uidValid),
64      mUID(uid),
65      mFd(-1),
66      mDrmManagerClient(NULL),
67      mBitrate(-1ll),
68      mPendingReadBufferTypes(0) {
69    mBufferingMonitor = new BufferingMonitor(notify);
70    resetDataSource();
71}
72
73void NuPlayer::GenericSource::resetDataSource() {
74    mHTTPService.clear();
75    mHttpSource.clear();
76    mUri.clear();
77    mUriHeaders.clear();
78    if (mFd >= 0) {
79        close(mFd);
80        mFd = -1;
81    }
82    mOffset = 0;
83    mLength = 0;
84    setDrmPlaybackStatusIfNeeded(Playback::STOP, 0);
85    mDecryptHandle = NULL;
86    mDrmManagerClient = NULL;
87    mStarted = false;
88    mStopRead = true;
89
90    if (mBufferingMonitorLooper != NULL) {
91        mBufferingMonitorLooper->unregisterHandler(mBufferingMonitor->id());
92        mBufferingMonitorLooper->stop();
93        mBufferingMonitorLooper = NULL;
94    }
95    mBufferingMonitor->stop();
96}
97
98status_t NuPlayer::GenericSource::setDataSource(
99        const sp<IMediaHTTPService> &httpService,
100        const char *url,
101        const KeyedVector<String8, String8> *headers) {
102    resetDataSource();
103
104    mHTTPService = httpService;
105    mUri = url;
106
107    if (headers) {
108        mUriHeaders = *headers;
109    }
110
111    // delay data source creation to prepareAsync() to avoid blocking
112    // the calling thread in setDataSource for any significant time.
113    return OK;
114}
115
116status_t NuPlayer::GenericSource::setDataSource(
117        int fd, int64_t offset, int64_t length) {
118    resetDataSource();
119
120    mFd = dup(fd);
121    mOffset = offset;
122    mLength = length;
123
124    // delay data source creation to prepareAsync() to avoid blocking
125    // the calling thread in setDataSource for any significant time.
126    return OK;
127}
128
129status_t NuPlayer::GenericSource::setDataSource(const sp<DataSource>& source) {
130    resetDataSource();
131    mDataSource = source;
132    return OK;
133}
134
135sp<MetaData> NuPlayer::GenericSource::getFileFormatMeta() const {
136    return mFileMeta;
137}
138
139status_t NuPlayer::GenericSource::initFromDataSource() {
140    sp<IMediaExtractor> extractor;
141    CHECK(mDataSource != NULL);
142
143    extractor = MediaExtractor::Create(mDataSource, NULL);
144
145    if (extractor == NULL) {
146        return UNKNOWN_ERROR;
147    }
148
149    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::getDefaultBufferingSettings(
246        BufferingSettings* buffering /* nonnull */) {
247    mBufferingMonitor->getDefaultBufferingSettings(buffering);
248    return OK;
249}
250
251status_t NuPlayer::GenericSource::setBufferingSettings(const BufferingSettings& buffering) {
252    return mBufferingMonitor->setBufferingSettings(buffering);
253}
254
255status_t NuPlayer::GenericSource::startSources() {
256    // Start the selected A/V tracks now before we start buffering.
257    // Widevine sources might re-initialize crypto when starting, if we delay
258    // this to start(), all data buffered during prepare would be wasted.
259    // (We don't actually start reading until start().)
260    //
261    // TODO: this logic may no longer be relevant after the removal of widevine
262    // support
263    if (mAudioTrack.mSource != NULL && mAudioTrack.mSource->start() != OK) {
264        ALOGE("failed to start audio track!");
265        return UNKNOWN_ERROR;
266    }
267
268    if (mVideoTrack.mSource != NULL && mVideoTrack.mSource->start() != OK) {
269        ALOGE("failed to start video track!");
270        return UNKNOWN_ERROR;
271    }
272
273    return OK;
274}
275
276void NuPlayer::GenericSource::checkDrmStatus(const sp<DataSource>& dataSource) {
277    dataSource->getDrmInfo(mDecryptHandle, &mDrmManagerClient);
278    if (mDecryptHandle != NULL) {
279        CHECK(mDrmManagerClient);
280        if (RightsStatus::RIGHTS_VALID != mDecryptHandle->status) {
281            sp<AMessage> msg = dupNotify();
282            msg->setInt32("what", kWhatDrmNoLicense);
283            msg->post();
284        }
285    }
286}
287
288int64_t NuPlayer::GenericSource::getLastReadPosition() {
289    if (mAudioTrack.mSource != NULL) {
290        return mAudioTimeUs;
291    } else if (mVideoTrack.mSource != NULL) {
292        return mVideoTimeUs;
293    } else {
294        return 0;
295    }
296}
297
298status_t NuPlayer::GenericSource::setBuffers(
299        bool audio, Vector<MediaBuffer *> &buffers) {
300    if (mIsSecure && !audio && mVideoTrack.mSource != NULL) {
301        return mVideoTrack.mSource->setBuffers(buffers);
302    }
303    return INVALID_OPERATION;
304}
305
306bool NuPlayer::GenericSource::isStreaming() const {
307    return mIsStreaming;
308}
309
310void NuPlayer::GenericSource::setOffloadAudio(bool offload) {
311    mBufferingMonitor->setOffloadAudio(offload);
312}
313
314NuPlayer::GenericSource::~GenericSource() {
315    if (mLooper != NULL) {
316        mLooper->unregisterHandler(id());
317        mLooper->stop();
318    }
319    resetDataSource();
320}
321
322void NuPlayer::GenericSource::prepareAsync() {
323    if (mLooper == NULL) {
324        mLooper = new ALooper;
325        mLooper->setName("generic");
326        mLooper->start();
327
328        mLooper->registerHandler(this);
329    }
330
331    sp<AMessage> msg = new AMessage(kWhatPrepareAsync, this);
332    msg->post();
333}
334
335void NuPlayer::GenericSource::onPrepareAsync() {
336    // delayed data source creation
337    if (mDataSource == NULL) {
338        // set to false first, if the extractor
339        // comes back as secure, set it to true then.
340        mIsSecure = false;
341
342        if (!mUri.empty()) {
343            const char* uri = mUri.c_str();
344            String8 contentType;
345
346            if (!strncasecmp("http://", uri, 7) || !strncasecmp("https://", uri, 8)) {
347                mHttpSource = DataSource::CreateMediaHTTP(mHTTPService);
348                if (mHttpSource == NULL) {
349                    ALOGE("Failed to create http source!");
350                    notifyPreparedAndCleanup(UNKNOWN_ERROR);
351                    return;
352                }
353            }
354
355            mDataSource = DataSource::CreateFromURI(
356                   mHTTPService, uri, &mUriHeaders, &contentType,
357                   static_cast<HTTPBase *>(mHttpSource.get()));
358        } else {
359            mDataSource = new FileSource(mFd, mOffset, mLength);
360            mFd = -1;
361        }
362
363        if (mDataSource == NULL) {
364            ALOGE("Failed to create data source!");
365            notifyPreparedAndCleanup(UNKNOWN_ERROR);
366            return;
367        }
368    }
369
370    if (mDataSource->flags() & DataSource::kIsCachingDataSource) {
371        mCachedSource = static_cast<NuCachedSource2 *>(mDataSource.get());
372    }
373
374    // For cached streaming cases, we need to wait for enough
375    // buffering before reporting prepared.
376    mIsStreaming = (mCachedSource != NULL);
377
378    // init extractor from data source
379    status_t err = initFromDataSource();
380
381    if (err != OK) {
382        ALOGE("Failed to init from data source!");
383        notifyPreparedAndCleanup(err);
384        return;
385    }
386
387    if (mVideoTrack.mSource != NULL) {
388        sp<MetaData> meta = doGetFormatMeta(false /* audio */);
389        sp<AMessage> msg = new AMessage;
390        err = convertMetaDataToMessage(meta, &msg);
391        if(err != OK) {
392            notifyPreparedAndCleanup(err);
393            return;
394        }
395        notifyVideoSizeChanged(msg);
396    }
397
398    notifyFlagsChanged(
399            (mIsSecure ? FLAG_SECURE : 0)
400            | (mDecryptHandle != NULL ? FLAG_PROTECTED : 0)
401            | FLAG_CAN_PAUSE
402            | FLAG_CAN_SEEK_BACKWARD
403            | FLAG_CAN_SEEK_FORWARD
404            | FLAG_CAN_SEEK);
405
406    if (mIsSecure) {
407        // secure decoders must be instantiated before starting widevine source
408        //
409        // TODO: mIsSecure and FLAG_SECURE may be obsolete, revisit after
410        // removing widevine
411        sp<AMessage> reply = new AMessage(kWhatSecureDecodersInstantiated, this);
412        notifyInstantiateSecureDecoders(reply);
413    } else {
414        finishPrepareAsync();
415    }
416}
417
418void NuPlayer::GenericSource::onSecureDecodersInstantiated(status_t err) {
419    if (err != OK) {
420        ALOGE("Failed to instantiate secure decoders!");
421        notifyPreparedAndCleanup(err);
422        return;
423    }
424    finishPrepareAsync();
425}
426
427void NuPlayer::GenericSource::finishPrepareAsync() {
428    status_t err = startSources();
429    if (err != OK) {
430        ALOGE("Failed to init start data source!");
431        notifyPreparedAndCleanup(err);
432        return;
433    }
434
435    if (mIsStreaming) {
436        if (mBufferingMonitorLooper == NULL) {
437            mBufferingMonitor->prepare(mCachedSource, mDurationUs, mBitrate,
438                    mIsStreaming);
439
440            mBufferingMonitorLooper = new ALooper;
441            mBufferingMonitorLooper->setName("GSBMonitor");
442            mBufferingMonitorLooper->start();
443            mBufferingMonitorLooper->registerHandler(mBufferingMonitor);
444        }
445
446        mBufferingMonitor->ensureCacheIsFetching();
447        mBufferingMonitor->restartPollBuffering();
448    } else {
449        notifyPrepared();
450    }
451}
452
453void NuPlayer::GenericSource::notifyPreparedAndCleanup(status_t err) {
454    if (err != OK) {
455        {
456            sp<DataSource> dataSource = mDataSource;
457            sp<NuCachedSource2> cachedSource = mCachedSource;
458            sp<DataSource> httpSource = mHttpSource;
459            {
460                Mutex::Autolock _l(mDisconnectLock);
461                mDataSource.clear();
462                mDecryptHandle = NULL;
463                mDrmManagerClient = NULL;
464                mCachedSource.clear();
465                mHttpSource.clear();
466            }
467        }
468        mBitrate = -1;
469
470        mBufferingMonitor->cancelPollBuffering();
471    }
472    notifyPrepared(err);
473}
474
475void NuPlayer::GenericSource::start() {
476    ALOGI("start");
477
478    mStopRead = false;
479    if (mAudioTrack.mSource != NULL) {
480        postReadBuffer(MEDIA_TRACK_TYPE_AUDIO);
481    }
482
483    if (mVideoTrack.mSource != NULL) {
484        postReadBuffer(MEDIA_TRACK_TYPE_VIDEO);
485    }
486
487    setDrmPlaybackStatusIfNeeded(Playback::START, getLastReadPosition() / 1000);
488    mStarted = true;
489
490    (new AMessage(kWhatStart, this))->post();
491}
492
493void NuPlayer::GenericSource::stop() {
494    // nothing to do, just account for DRM playback status
495    setDrmPlaybackStatusIfNeeded(Playback::STOP, 0);
496    mStarted = false;
497}
498
499void NuPlayer::GenericSource::pause() {
500    // nothing to do, just account for DRM playback status
501    setDrmPlaybackStatusIfNeeded(Playback::PAUSE, 0);
502    mStarted = false;
503}
504
505void NuPlayer::GenericSource::resume() {
506    // nothing to do, just account for DRM playback status
507    setDrmPlaybackStatusIfNeeded(Playback::START, getLastReadPosition() / 1000);
508    mStarted = true;
509
510    (new AMessage(kWhatResume, this))->post();
511}
512
513void NuPlayer::GenericSource::disconnect() {
514    sp<DataSource> dataSource, httpSource;
515    {
516        Mutex::Autolock _l(mDisconnectLock);
517        dataSource = mDataSource;
518        httpSource = mHttpSource;
519    }
520
521    if (dataSource != NULL) {
522        // disconnect data source
523        if (dataSource->flags() & DataSource::kIsCachingDataSource) {
524            static_cast<NuCachedSource2 *>(dataSource.get())->disconnect();
525        }
526    } else if (httpSource != NULL) {
527        static_cast<HTTPBase *>(httpSource.get())->disconnect();
528    }
529}
530
531void NuPlayer::GenericSource::setDrmPlaybackStatusIfNeeded(int playbackStatus, int64_t position) {
532    if (mDecryptHandle != NULL) {
533        mDrmManagerClient->setPlaybackStatus(mDecryptHandle, playbackStatus, position);
534    }
535    mSubtitleTrack.mPackets = new AnotherPacketSource(NULL);
536    mTimedTextTrack.mPackets = new AnotherPacketSource(NULL);
537}
538
539status_t NuPlayer::GenericSource::feedMoreTSData() {
540    return OK;
541}
542
543void NuPlayer::GenericSource::onMessageReceived(const sp<AMessage> &msg) {
544    switch (msg->what()) {
545      case kWhatPrepareAsync:
546      {
547          onPrepareAsync();
548          break;
549      }
550      case kWhatFetchSubtitleData:
551      {
552          fetchTextData(kWhatSendSubtitleData, MEDIA_TRACK_TYPE_SUBTITLE,
553                  mFetchSubtitleDataGeneration, mSubtitleTrack.mPackets, msg);
554          break;
555      }
556
557      case kWhatFetchTimedTextData:
558      {
559          fetchTextData(kWhatSendTimedTextData, MEDIA_TRACK_TYPE_TIMEDTEXT,
560                  mFetchTimedTextDataGeneration, mTimedTextTrack.mPackets, msg);
561          break;
562      }
563
564      case kWhatSendSubtitleData:
565      {
566          sendTextData(kWhatSubtitleData, MEDIA_TRACK_TYPE_SUBTITLE,
567                  mFetchSubtitleDataGeneration, mSubtitleTrack.mPackets, msg);
568          break;
569      }
570
571      case kWhatSendGlobalTimedTextData:
572      {
573          sendGlobalTextData(kWhatTimedTextData, mFetchTimedTextDataGeneration, msg);
574          break;
575      }
576      case kWhatSendTimedTextData:
577      {
578          sendTextData(kWhatTimedTextData, MEDIA_TRACK_TYPE_TIMEDTEXT,
579                  mFetchTimedTextDataGeneration, mTimedTextTrack.mPackets, msg);
580          break;
581      }
582
583      case kWhatChangeAVSource:
584      {
585          int32_t trackIndex;
586          CHECK(msg->findInt32("trackIndex", &trackIndex));
587          const sp<IMediaSource> source = mSources.itemAt(trackIndex);
588
589          Track* track;
590          const char *mime;
591          media_track_type trackType, counterpartType;
592          sp<MetaData> meta = source->getFormat();
593          meta->findCString(kKeyMIMEType, &mime);
594          if (!strncasecmp(mime, "audio/", 6)) {
595              track = &mAudioTrack;
596              trackType = MEDIA_TRACK_TYPE_AUDIO;
597              counterpartType = MEDIA_TRACK_TYPE_VIDEO;;
598          } else {
599              CHECK(!strncasecmp(mime, "video/", 6));
600              track = &mVideoTrack;
601              trackType = MEDIA_TRACK_TYPE_VIDEO;
602              counterpartType = MEDIA_TRACK_TYPE_AUDIO;;
603          }
604
605
606          if (track->mSource != NULL) {
607              track->mSource->stop();
608          }
609          track->mSource = source;
610          track->mSource->start();
611          track->mIndex = trackIndex;
612
613          int64_t timeUs, actualTimeUs;
614          const bool formatChange = true;
615          if (trackType == MEDIA_TRACK_TYPE_AUDIO) {
616              timeUs = mAudioLastDequeueTimeUs;
617          } else {
618              timeUs = mVideoLastDequeueTimeUs;
619          }
620          readBuffer(trackType, timeUs, MediaPlayerSeekMode::SEEK_PREVIOUS_SYNC /* mode */,
621                  &actualTimeUs, formatChange);
622          readBuffer(counterpartType, -1, MediaPlayerSeekMode::SEEK_PREVIOUS_SYNC /* mode */,
623                  NULL, !formatChange);
624          ALOGV("timeUs %lld actualTimeUs %lld", (long long)timeUs, (long long)actualTimeUs);
625
626          break;
627      }
628
629      case kWhatStart:
630      case kWhatResume:
631      {
632          mBufferingMonitor->restartPollBuffering();
633          break;
634      }
635
636      case kWhatGetFormat:
637      {
638          onGetFormatMeta(msg);
639          break;
640      }
641
642      case kWhatGetSelectedTrack:
643      {
644          onGetSelectedTrack(msg);
645          break;
646      }
647
648      case kWhatSelectTrack:
649      {
650          onSelectTrack(msg);
651          break;
652      }
653
654      case kWhatSeek:
655      {
656          onSeek(msg);
657          break;
658      }
659
660      case kWhatReadBuffer:
661      {
662          onReadBuffer(msg);
663          break;
664      }
665
666      case kWhatSecureDecodersInstantiated:
667      {
668          int32_t err;
669          CHECK(msg->findInt32("err", &err));
670          onSecureDecodersInstantiated(err);
671          break;
672      }
673
674      default:
675          Source::onMessageReceived(msg);
676          break;
677    }
678}
679
680void NuPlayer::GenericSource::fetchTextData(
681        uint32_t sendWhat,
682        media_track_type type,
683        int32_t curGen,
684        const sp<AnotherPacketSource>& packets,
685        const sp<AMessage>& msg) {
686    int32_t msgGeneration;
687    CHECK(msg->findInt32("generation", &msgGeneration));
688    if (msgGeneration != curGen) {
689        // stale
690        return;
691    }
692
693    int32_t avail;
694    if (packets->hasBufferAvailable(&avail)) {
695        return;
696    }
697
698    int64_t timeUs;
699    CHECK(msg->findInt64("timeUs", &timeUs));
700
701    int64_t subTimeUs;
702    readBuffer(type, timeUs, MediaPlayerSeekMode::SEEK_PREVIOUS_SYNC /* mode */, &subTimeUs);
703
704    int64_t delayUs = subTimeUs - timeUs;
705    if (msg->what() == kWhatFetchSubtitleData) {
706        const int64_t oneSecUs = 1000000ll;
707        delayUs -= oneSecUs;
708    }
709    sp<AMessage> msg2 = new AMessage(sendWhat, this);
710    msg2->setInt32("generation", msgGeneration);
711    msg2->post(delayUs < 0 ? 0 : delayUs);
712}
713
714void NuPlayer::GenericSource::sendTextData(
715        uint32_t what,
716        media_track_type type,
717        int32_t curGen,
718        const sp<AnotherPacketSource>& packets,
719        const sp<AMessage>& msg) {
720    int32_t msgGeneration;
721    CHECK(msg->findInt32("generation", &msgGeneration));
722    if (msgGeneration != curGen) {
723        // stale
724        return;
725    }
726
727    int64_t subTimeUs;
728    if (packets->nextBufferTime(&subTimeUs) != OK) {
729        return;
730    }
731
732    int64_t nextSubTimeUs;
733    readBuffer(type, -1, MediaPlayerSeekMode::SEEK_PREVIOUS_SYNC /* mode */, &nextSubTimeUs);
734
735    sp<ABuffer> buffer;
736    status_t dequeueStatus = packets->dequeueAccessUnit(&buffer);
737    if (dequeueStatus == OK) {
738        sp<AMessage> notify = dupNotify();
739        notify->setInt32("what", what);
740        notify->setBuffer("buffer", buffer);
741        notify->post();
742
743        const int64_t delayUs = nextSubTimeUs - subTimeUs;
744        msg->post(delayUs < 0 ? 0 : delayUs);
745    }
746}
747
748void NuPlayer::GenericSource::sendGlobalTextData(
749        uint32_t what,
750        int32_t curGen,
751        sp<AMessage> msg) {
752    int32_t msgGeneration;
753    CHECK(msg->findInt32("generation", &msgGeneration));
754    if (msgGeneration != curGen) {
755        // stale
756        return;
757    }
758
759    uint32_t textType;
760    const void *data;
761    size_t size = 0;
762    if (mTimedTextTrack.mSource->getFormat()->findData(
763                    kKeyTextFormatData, &textType, &data, &size)) {
764        mGlobalTimedText = new ABuffer(size);
765        if (mGlobalTimedText->data()) {
766            memcpy(mGlobalTimedText->data(), data, size);
767            sp<AMessage> globalMeta = mGlobalTimedText->meta();
768            globalMeta->setInt64("timeUs", 0);
769            globalMeta->setString("mime", MEDIA_MIMETYPE_TEXT_3GPP);
770            globalMeta->setInt32("global", 1);
771            sp<AMessage> notify = dupNotify();
772            notify->setInt32("what", what);
773            notify->setBuffer("buffer", mGlobalTimedText);
774            notify->post();
775        }
776    }
777}
778
779sp<MetaData> NuPlayer::GenericSource::getFormatMeta(bool audio) {
780    sp<AMessage> msg = new AMessage(kWhatGetFormat, this);
781    msg->setInt32("audio", audio);
782
783    sp<AMessage> response;
784    sp<RefBase> format;
785    status_t err = msg->postAndAwaitResponse(&response);
786    if (err == OK && response != NULL) {
787        CHECK(response->findObject("format", &format));
788        return static_cast<MetaData*>(format.get());
789    } else {
790        return NULL;
791    }
792}
793
794void NuPlayer::GenericSource::onGetFormatMeta(const sp<AMessage>& msg) const {
795    int32_t audio;
796    CHECK(msg->findInt32("audio", &audio));
797
798    sp<AMessage> response = new AMessage;
799    sp<MetaData> format = doGetFormatMeta(audio);
800    response->setObject("format", format);
801
802    sp<AReplyToken> replyID;
803    CHECK(msg->senderAwaitsResponse(&replyID));
804    response->postReply(replyID);
805}
806
807sp<MetaData> NuPlayer::GenericSource::doGetFormatMeta(bool audio) const {
808    sp<IMediaSource> source = audio ? mAudioTrack.mSource : mVideoTrack.mSource;
809
810    if (source == NULL) {
811        return NULL;
812    }
813
814    return source->getFormat();
815}
816
817status_t NuPlayer::GenericSource::dequeueAccessUnit(
818        bool audio, sp<ABuffer> *accessUnit) {
819    if (audio && !mStarted) {
820        return -EWOULDBLOCK;
821    }
822
823    Track *track = audio ? &mAudioTrack : &mVideoTrack;
824
825    if (track->mSource == NULL) {
826        return -EWOULDBLOCK;
827    }
828
829    status_t finalResult;
830    if (!track->mPackets->hasBufferAvailable(&finalResult)) {
831        if (finalResult == OK) {
832            postReadBuffer(
833                    audio ? MEDIA_TRACK_TYPE_AUDIO : MEDIA_TRACK_TYPE_VIDEO);
834            return -EWOULDBLOCK;
835        }
836        return finalResult;
837    }
838
839    status_t result = track->mPackets->dequeueAccessUnit(accessUnit);
840
841    // start pulling in more buffers if we only have one (or no) buffer left
842    // so that decoder has less chance of being starved
843    if (track->mPackets->getAvailableBufferCount(&finalResult) < 2) {
844        postReadBuffer(audio? MEDIA_TRACK_TYPE_AUDIO : MEDIA_TRACK_TYPE_VIDEO);
845    }
846
847    if (result != OK) {
848        if (mSubtitleTrack.mSource != NULL) {
849            mSubtitleTrack.mPackets->clear();
850            mFetchSubtitleDataGeneration++;
851        }
852        if (mTimedTextTrack.mSource != NULL) {
853            mTimedTextTrack.mPackets->clear();
854            mFetchTimedTextDataGeneration++;
855        }
856        return result;
857    }
858
859    int64_t timeUs;
860    status_t eosResult; // ignored
861    CHECK((*accessUnit)->meta()->findInt64("timeUs", &timeUs));
862    if (audio) {
863        mAudioLastDequeueTimeUs = timeUs;
864        mBufferingMonitor->updateDequeuedBufferTime(timeUs);
865    } else {
866        mVideoLastDequeueTimeUs = timeUs;
867    }
868
869    if (mSubtitleTrack.mSource != NULL
870            && !mSubtitleTrack.mPackets->hasBufferAvailable(&eosResult)) {
871        sp<AMessage> msg = new AMessage(kWhatFetchSubtitleData, this);
872        msg->setInt64("timeUs", timeUs);
873        msg->setInt32("generation", mFetchSubtitleDataGeneration);
874        msg->post();
875    }
876
877    if (mTimedTextTrack.mSource != NULL
878            && !mTimedTextTrack.mPackets->hasBufferAvailable(&eosResult)) {
879        sp<AMessage> msg = new AMessage(kWhatFetchTimedTextData, this);
880        msg->setInt64("timeUs", timeUs);
881        msg->setInt32("generation", mFetchTimedTextDataGeneration);
882        msg->post();
883    }
884
885    return result;
886}
887
888status_t NuPlayer::GenericSource::getDuration(int64_t *durationUs) {
889    *durationUs = mDurationUs;
890    return OK;
891}
892
893size_t NuPlayer::GenericSource::getTrackCount() const {
894    return mSources.size();
895}
896
897sp<AMessage> NuPlayer::GenericSource::getTrackInfo(size_t trackIndex) const {
898    size_t trackCount = mSources.size();
899    if (trackIndex >= trackCount) {
900        return NULL;
901    }
902
903    sp<AMessage> format = new AMessage();
904    sp<MetaData> meta = mSources.itemAt(trackIndex)->getFormat();
905    if (meta == NULL) {
906        ALOGE("no metadata for track %zu", trackIndex);
907        return NULL;
908    }
909
910    const char *mime;
911    CHECK(meta->findCString(kKeyMIMEType, &mime));
912    format->setString("mime", mime);
913
914    int32_t trackType;
915    if (!strncasecmp(mime, "video/", 6)) {
916        trackType = MEDIA_TRACK_TYPE_VIDEO;
917    } else if (!strncasecmp(mime, "audio/", 6)) {
918        trackType = MEDIA_TRACK_TYPE_AUDIO;
919    } else if (!strcasecmp(mime, MEDIA_MIMETYPE_TEXT_3GPP)) {
920        trackType = MEDIA_TRACK_TYPE_TIMEDTEXT;
921    } else {
922        trackType = MEDIA_TRACK_TYPE_UNKNOWN;
923    }
924    format->setInt32("type", trackType);
925
926    const char *lang;
927    if (!meta->findCString(kKeyMediaLanguage, &lang)) {
928        lang = "und";
929    }
930    format->setString("language", lang);
931
932    if (trackType == MEDIA_TRACK_TYPE_SUBTITLE) {
933        int32_t isAutoselect = 1, isDefault = 0, isForced = 0;
934        meta->findInt32(kKeyTrackIsAutoselect, &isAutoselect);
935        meta->findInt32(kKeyTrackIsDefault, &isDefault);
936        meta->findInt32(kKeyTrackIsForced, &isForced);
937
938        format->setInt32("auto", !!isAutoselect);
939        format->setInt32("default", !!isDefault);
940        format->setInt32("forced", !!isForced);
941    }
942
943    return format;
944}
945
946ssize_t NuPlayer::GenericSource::getSelectedTrack(media_track_type type) const {
947    sp<AMessage> msg = new AMessage(kWhatGetSelectedTrack, this);
948    msg->setInt32("type", type);
949
950    sp<AMessage> response;
951    int32_t index;
952    status_t err = msg->postAndAwaitResponse(&response);
953    if (err == OK && response != NULL) {
954        CHECK(response->findInt32("index", &index));
955        return index;
956    } else {
957        return -1;
958    }
959}
960
961void NuPlayer::GenericSource::onGetSelectedTrack(const sp<AMessage>& msg) const {
962    int32_t tmpType;
963    CHECK(msg->findInt32("type", &tmpType));
964    media_track_type type = (media_track_type)tmpType;
965
966    sp<AMessage> response = new AMessage;
967    ssize_t index = doGetSelectedTrack(type);
968    response->setInt32("index", index);
969
970    sp<AReplyToken> replyID;
971    CHECK(msg->senderAwaitsResponse(&replyID));
972    response->postReply(replyID);
973}
974
975ssize_t NuPlayer::GenericSource::doGetSelectedTrack(media_track_type type) const {
976    const Track *track = NULL;
977    switch (type) {
978    case MEDIA_TRACK_TYPE_VIDEO:
979        track = &mVideoTrack;
980        break;
981    case MEDIA_TRACK_TYPE_AUDIO:
982        track = &mAudioTrack;
983        break;
984    case MEDIA_TRACK_TYPE_TIMEDTEXT:
985        track = &mTimedTextTrack;
986        break;
987    case MEDIA_TRACK_TYPE_SUBTITLE:
988        track = &mSubtitleTrack;
989        break;
990    default:
991        break;
992    }
993
994    if (track != NULL && track->mSource != NULL) {
995        return track->mIndex;
996    }
997
998    return -1;
999}
1000
1001status_t NuPlayer::GenericSource::selectTrack(size_t trackIndex, bool select, int64_t timeUs) {
1002    ALOGV("%s track: %zu", select ? "select" : "deselect", trackIndex);
1003    sp<AMessage> msg = new AMessage(kWhatSelectTrack, this);
1004    msg->setInt32("trackIndex", trackIndex);
1005    msg->setInt32("select", select);
1006    msg->setInt64("timeUs", timeUs);
1007
1008    sp<AMessage> response;
1009    status_t err = msg->postAndAwaitResponse(&response);
1010    if (err == OK && response != NULL) {
1011        CHECK(response->findInt32("err", &err));
1012    }
1013
1014    return err;
1015}
1016
1017void NuPlayer::GenericSource::onSelectTrack(const sp<AMessage>& msg) {
1018    int32_t trackIndex, select;
1019    int64_t timeUs;
1020    CHECK(msg->findInt32("trackIndex", &trackIndex));
1021    CHECK(msg->findInt32("select", &select));
1022    CHECK(msg->findInt64("timeUs", &timeUs));
1023
1024    sp<AMessage> response = new AMessage;
1025    status_t err = doSelectTrack(trackIndex, select, timeUs);
1026    response->setInt32("err", err);
1027
1028    sp<AReplyToken> replyID;
1029    CHECK(msg->senderAwaitsResponse(&replyID));
1030    response->postReply(replyID);
1031}
1032
1033status_t NuPlayer::GenericSource::doSelectTrack(size_t trackIndex, bool select, int64_t timeUs) {
1034    if (trackIndex >= mSources.size()) {
1035        return BAD_INDEX;
1036    }
1037
1038    if (!select) {
1039        Track* track = NULL;
1040        if (mSubtitleTrack.mSource != NULL && trackIndex == mSubtitleTrack.mIndex) {
1041            track = &mSubtitleTrack;
1042            mFetchSubtitleDataGeneration++;
1043        } else if (mTimedTextTrack.mSource != NULL && trackIndex == mTimedTextTrack.mIndex) {
1044            track = &mTimedTextTrack;
1045            mFetchTimedTextDataGeneration++;
1046        }
1047        if (track == NULL) {
1048            return INVALID_OPERATION;
1049        }
1050        track->mSource->stop();
1051        track->mSource = NULL;
1052        track->mPackets->clear();
1053        return OK;
1054    }
1055
1056    const sp<IMediaSource> source = mSources.itemAt(trackIndex);
1057    sp<MetaData> meta = source->getFormat();
1058    const char *mime;
1059    CHECK(meta->findCString(kKeyMIMEType, &mime));
1060    if (!strncasecmp(mime, "text/", 5)) {
1061        bool isSubtitle = strcasecmp(mime, MEDIA_MIMETYPE_TEXT_3GPP);
1062        Track *track = isSubtitle ? &mSubtitleTrack : &mTimedTextTrack;
1063        if (track->mSource != NULL && track->mIndex == trackIndex) {
1064            return OK;
1065        }
1066        track->mIndex = trackIndex;
1067        if (track->mSource != NULL) {
1068            track->mSource->stop();
1069        }
1070        track->mSource = mSources.itemAt(trackIndex);
1071        track->mSource->start();
1072        if (track->mPackets == NULL) {
1073            track->mPackets = new AnotherPacketSource(track->mSource->getFormat());
1074        } else {
1075            track->mPackets->clear();
1076            track->mPackets->setFormat(track->mSource->getFormat());
1077
1078        }
1079
1080        if (isSubtitle) {
1081            mFetchSubtitleDataGeneration++;
1082        } else {
1083            mFetchTimedTextDataGeneration++;
1084        }
1085
1086        status_t eosResult; // ignored
1087        if (mSubtitleTrack.mSource != NULL
1088                && !mSubtitleTrack.mPackets->hasBufferAvailable(&eosResult)) {
1089            sp<AMessage> msg = new AMessage(kWhatFetchSubtitleData, this);
1090            msg->setInt64("timeUs", timeUs);
1091            msg->setInt32("generation", mFetchSubtitleDataGeneration);
1092            msg->post();
1093        }
1094
1095        sp<AMessage> msg2 = new AMessage(kWhatSendGlobalTimedTextData, this);
1096        msg2->setInt32("generation", mFetchTimedTextDataGeneration);
1097        msg2->post();
1098
1099        if (mTimedTextTrack.mSource != NULL
1100                && !mTimedTextTrack.mPackets->hasBufferAvailable(&eosResult)) {
1101            sp<AMessage> msg = new AMessage(kWhatFetchTimedTextData, this);
1102            msg->setInt64("timeUs", timeUs);
1103            msg->setInt32("generation", mFetchTimedTextDataGeneration);
1104            msg->post();
1105        }
1106
1107        return OK;
1108    } else if (!strncasecmp(mime, "audio/", 6) || !strncasecmp(mime, "video/", 6)) {
1109        bool audio = !strncasecmp(mime, "audio/", 6);
1110        Track *track = audio ? &mAudioTrack : &mVideoTrack;
1111        if (track->mSource != NULL && track->mIndex == trackIndex) {
1112            return OK;
1113        }
1114
1115        sp<AMessage> msg = new AMessage(kWhatChangeAVSource, this);
1116        msg->setInt32("trackIndex", trackIndex);
1117        msg->post();
1118        return OK;
1119    }
1120
1121    return INVALID_OPERATION;
1122}
1123
1124status_t NuPlayer::GenericSource::seekTo(int64_t seekTimeUs, MediaPlayerSeekMode mode) {
1125    sp<AMessage> msg = new AMessage(kWhatSeek, this);
1126    msg->setInt64("seekTimeUs", seekTimeUs);
1127    msg->setInt32("mode", mode);
1128
1129    sp<AMessage> response;
1130    status_t err = msg->postAndAwaitResponse(&response);
1131    if (err == OK && response != NULL) {
1132        CHECK(response->findInt32("err", &err));
1133    }
1134
1135    return err;
1136}
1137
1138void NuPlayer::GenericSource::onSeek(const sp<AMessage>& msg) {
1139    int64_t seekTimeUs;
1140    int32_t mode;
1141    CHECK(msg->findInt64("seekTimeUs", &seekTimeUs));
1142    CHECK(msg->findInt32("mode", &mode));
1143
1144    sp<AMessage> response = new AMessage;
1145    status_t err = doSeek(seekTimeUs, (MediaPlayerSeekMode)mode);
1146    response->setInt32("err", err);
1147
1148    sp<AReplyToken> replyID;
1149    CHECK(msg->senderAwaitsResponse(&replyID));
1150    response->postReply(replyID);
1151}
1152
1153status_t NuPlayer::GenericSource::doSeek(int64_t seekTimeUs, MediaPlayerSeekMode mode) {
1154    mBufferingMonitor->updateDequeuedBufferTime(-1ll);
1155
1156    // If the Widevine source is stopped, do not attempt to read any
1157    // more buffers.
1158    //
1159    // TODO: revisit after widevine is removed.  May be able to
1160    // combine mStopRead with mStarted.
1161    if (mStopRead) {
1162        return INVALID_OPERATION;
1163    }
1164    if (mVideoTrack.mSource != NULL) {
1165        int64_t actualTimeUs;
1166        readBuffer(MEDIA_TRACK_TYPE_VIDEO, seekTimeUs, mode, &actualTimeUs);
1167
1168        if (mode != MediaPlayerSeekMode::SEEK_CLOSEST) {
1169            seekTimeUs = actualTimeUs;
1170        }
1171        mVideoLastDequeueTimeUs = actualTimeUs;
1172    }
1173
1174    if (mAudioTrack.mSource != NULL) {
1175        readBuffer(MEDIA_TRACK_TYPE_AUDIO, seekTimeUs);
1176        mAudioLastDequeueTimeUs = seekTimeUs;
1177    }
1178
1179    setDrmPlaybackStatusIfNeeded(Playback::START, seekTimeUs / 1000);
1180    if (!mStarted) {
1181        setDrmPlaybackStatusIfNeeded(Playback::PAUSE, 0);
1182    }
1183
1184    // If currently buffering, post kWhatBufferingEnd first, so that
1185    // NuPlayer resumes. Otherwise, if cache hits high watermark
1186    // before new polling happens, no one will resume the playback.
1187    mBufferingMonitor->stopBufferingIfNecessary();
1188    mBufferingMonitor->restartPollBuffering();
1189
1190    return OK;
1191}
1192
1193sp<ABuffer> NuPlayer::GenericSource::mediaBufferToABuffer(
1194        MediaBuffer* mb,
1195        media_track_type trackType) {
1196    bool audio = trackType == MEDIA_TRACK_TYPE_AUDIO;
1197    size_t outLength = mb->range_length();
1198
1199    if (audio && mAudioIsVorbis) {
1200        outLength += sizeof(int32_t);
1201    }
1202
1203    sp<ABuffer> ab;
1204    if (mIsSecure && !audio) {
1205        // data is already provided in the buffer
1206        ab = new ABuffer(NULL, mb->range_length());
1207        mb->add_ref();
1208        ab->setMediaBufferBase(mb);
1209    } else {
1210        ab = new ABuffer(outLength);
1211        memcpy(ab->data(),
1212               (const uint8_t *)mb->data() + mb->range_offset(),
1213               mb->range_length());
1214    }
1215
1216    if (audio && mAudioIsVorbis) {
1217        int32_t numPageSamples;
1218        if (!mb->meta_data()->findInt32(kKeyValidSamples, &numPageSamples)) {
1219            numPageSamples = -1;
1220        }
1221
1222        uint8_t* abEnd = ab->data() + mb->range_length();
1223        memcpy(abEnd, &numPageSamples, sizeof(numPageSamples));
1224    }
1225
1226    sp<AMessage> meta = ab->meta();
1227
1228    int64_t timeUs;
1229    CHECK(mb->meta_data()->findInt64(kKeyTime, &timeUs));
1230    meta->setInt64("timeUs", timeUs);
1231
1232    if (trackType == MEDIA_TRACK_TYPE_VIDEO) {
1233        int32_t layerId;
1234        if (mb->meta_data()->findInt32(kKeyTemporalLayerId, &layerId)) {
1235            meta->setInt32("temporal-layer-id", layerId);
1236        }
1237    }
1238
1239    if (trackType == MEDIA_TRACK_TYPE_TIMEDTEXT) {
1240        const char *mime;
1241        CHECK(mTimedTextTrack.mSource != NULL
1242                && mTimedTextTrack.mSource->getFormat()->findCString(kKeyMIMEType, &mime));
1243        meta->setString("mime", mime);
1244    }
1245
1246    int64_t durationUs;
1247    if (mb->meta_data()->findInt64(kKeyDuration, &durationUs)) {
1248        meta->setInt64("durationUs", durationUs);
1249    }
1250
1251    if (trackType == MEDIA_TRACK_TYPE_SUBTITLE) {
1252        meta->setInt32("trackIndex", mSubtitleTrack.mIndex);
1253    }
1254
1255    uint32_t dataType; // unused
1256    const void *seiData;
1257    size_t seiLength;
1258    if (mb->meta_data()->findData(kKeySEI, &dataType, &seiData, &seiLength)) {
1259        sp<ABuffer> sei = ABuffer::CreateAsCopy(seiData, seiLength);;
1260        meta->setBuffer("sei", sei);
1261    }
1262
1263    const void *mpegUserDataPointer;
1264    size_t mpegUserDataLength;
1265    if (mb->meta_data()->findData(
1266            kKeyMpegUserData, &dataType, &mpegUserDataPointer, &mpegUserDataLength)) {
1267        sp<ABuffer> mpegUserData = ABuffer::CreateAsCopy(mpegUserDataPointer, mpegUserDataLength);
1268        meta->setBuffer("mpegUserData", mpegUserData);
1269    }
1270
1271    mb->release();
1272    mb = NULL;
1273
1274    return ab;
1275}
1276
1277void NuPlayer::GenericSource::postReadBuffer(media_track_type trackType) {
1278    Mutex::Autolock _l(mReadBufferLock);
1279
1280    if ((mPendingReadBufferTypes & (1 << trackType)) == 0) {
1281        mPendingReadBufferTypes |= (1 << trackType);
1282        sp<AMessage> msg = new AMessage(kWhatReadBuffer, this);
1283        msg->setInt32("trackType", trackType);
1284        msg->post();
1285    }
1286}
1287
1288void NuPlayer::GenericSource::onReadBuffer(const sp<AMessage>& msg) {
1289    int32_t tmpType;
1290    CHECK(msg->findInt32("trackType", &tmpType));
1291    media_track_type trackType = (media_track_type)tmpType;
1292    readBuffer(trackType);
1293    {
1294        // only protect the variable change, as readBuffer may
1295        // take considerable time.
1296        Mutex::Autolock _l(mReadBufferLock);
1297        mPendingReadBufferTypes &= ~(1 << trackType);
1298    }
1299}
1300
1301void NuPlayer::GenericSource::readBuffer(
1302        media_track_type trackType, int64_t seekTimeUs, MediaPlayerSeekMode mode,
1303        int64_t *actualTimeUs, bool formatChange) {
1304    // Do not read data if Widevine source is stopped
1305    //
1306    // TODO: revisit after widevine is removed.  May be able to
1307    // combine mStopRead with mStarted.
1308    if (mStopRead) {
1309        return;
1310    }
1311    Track *track;
1312    size_t maxBuffers = 1;
1313    switch (trackType) {
1314        case MEDIA_TRACK_TYPE_VIDEO:
1315            track = &mVideoTrack;
1316            maxBuffers = 8;  // too large of a number may influence seeks
1317            break;
1318        case MEDIA_TRACK_TYPE_AUDIO:
1319            track = &mAudioTrack;
1320            maxBuffers = 64;
1321            break;
1322        case MEDIA_TRACK_TYPE_SUBTITLE:
1323            track = &mSubtitleTrack;
1324            break;
1325        case MEDIA_TRACK_TYPE_TIMEDTEXT:
1326            track = &mTimedTextTrack;
1327            break;
1328        default:
1329            TRESPASS();
1330    }
1331
1332    if (track->mSource == NULL) {
1333        return;
1334    }
1335
1336    if (actualTimeUs) {
1337        *actualTimeUs = seekTimeUs;
1338    }
1339
1340    MediaSource::ReadOptions options;
1341
1342    bool seeking = false;
1343    if (seekTimeUs >= 0) {
1344        options.setSeekTo(seekTimeUs, mode);
1345        seeking = true;
1346    }
1347
1348    const bool couldReadMultiple = (track->mSource->supportReadMultiple());
1349
1350    if (couldReadMultiple) {
1351        options.setNonBlocking();
1352    }
1353
1354    for (size_t numBuffers = 0; numBuffers < maxBuffers; ) {
1355        Vector<MediaBuffer *> mediaBuffers;
1356        status_t err = NO_ERROR;
1357
1358        if (couldReadMultiple) {
1359            err = track->mSource->readMultiple(
1360                    &mediaBuffers, maxBuffers - numBuffers, &options);
1361        } else {
1362            MediaBuffer *mbuf = NULL;
1363            err = track->mSource->read(&mbuf, &options);
1364            if (err == OK && mbuf != NULL) {
1365                mediaBuffers.push_back(mbuf);
1366            }
1367        }
1368
1369        options.clearNonPersistent();
1370
1371        size_t id = 0;
1372        size_t count = mediaBuffers.size();
1373        for (; id < count; ++id) {
1374            int64_t timeUs;
1375            MediaBuffer *mbuf = mediaBuffers[id];
1376            if (!mbuf->meta_data()->findInt64(kKeyTime, &timeUs)) {
1377                mbuf->meta_data()->dumpToLog();
1378                track->mPackets->signalEOS(ERROR_MALFORMED);
1379                break;
1380            }
1381            if (trackType == MEDIA_TRACK_TYPE_AUDIO) {
1382                mAudioTimeUs = timeUs;
1383                mBufferingMonitor->updateQueuedTime(true /* isAudio */, timeUs);
1384            } else if (trackType == MEDIA_TRACK_TYPE_VIDEO) {
1385                mVideoTimeUs = timeUs;
1386                mBufferingMonitor->updateQueuedTime(false /* isAudio */, timeUs);
1387            }
1388
1389            queueDiscontinuityIfNeeded(seeking, formatChange, trackType, track);
1390
1391            sp<ABuffer> buffer = mediaBufferToABuffer(mbuf, trackType);
1392            if (numBuffers == 0 && actualTimeUs != nullptr) {
1393                *actualTimeUs = timeUs;
1394            }
1395            if (seeking && buffer != nullptr) {
1396                sp<AMessage> meta = buffer->meta();
1397                if (meta != nullptr && mode == MediaPlayerSeekMode::SEEK_CLOSEST
1398                        && seekTimeUs > timeUs) {
1399                    sp<AMessage> extra = new AMessage;
1400                    extra->setInt64("resume-at-mediaTimeUs", seekTimeUs);
1401                    meta->setMessage("extra", extra);
1402                }
1403            }
1404
1405            track->mPackets->queueAccessUnit(buffer);
1406            formatChange = false;
1407            seeking = false;
1408            ++numBuffers;
1409        }
1410        if (id < count) {
1411            // Error, some mediaBuffer doesn't have kKeyTime.
1412            for (; id < count; ++id) {
1413                mediaBuffers[id]->release();
1414            }
1415            break;
1416        }
1417
1418        if (err == WOULD_BLOCK) {
1419            break;
1420        } else if (err == INFO_FORMAT_CHANGED) {
1421#if 0
1422            track->mPackets->queueDiscontinuity(
1423                    ATSParser::DISCONTINUITY_FORMATCHANGE,
1424                    NULL,
1425                    false /* discard */);
1426#endif
1427        } else if (err != OK) {
1428            queueDiscontinuityIfNeeded(seeking, formatChange, trackType, track);
1429            track->mPackets->signalEOS(err);
1430            break;
1431        }
1432    }
1433}
1434
1435void NuPlayer::GenericSource::queueDiscontinuityIfNeeded(
1436        bool seeking, bool formatChange, media_track_type trackType, Track *track) {
1437    // formatChange && seeking: track whose source is changed during selection
1438    // formatChange && !seeking: track whose source is not changed during selection
1439    // !formatChange: normal seek
1440    if ((seeking || formatChange)
1441            && (trackType == MEDIA_TRACK_TYPE_AUDIO
1442            || trackType == MEDIA_TRACK_TYPE_VIDEO)) {
1443        ATSParser::DiscontinuityType type = (formatChange && seeking)
1444                ? ATSParser::DISCONTINUITY_FORMATCHANGE
1445                : ATSParser::DISCONTINUITY_NONE;
1446        track->mPackets->queueDiscontinuity(type, NULL /* extra */, true /* discard */);
1447    }
1448}
1449
1450NuPlayer::GenericSource::BufferingMonitor::BufferingMonitor(const sp<AMessage> &notify)
1451    : mNotify(notify),
1452      mDurationUs(-1ll),
1453      mBitrate(-1ll),
1454      mIsStreaming(false),
1455      mAudioTimeUs(0),
1456      mVideoTimeUs(0),
1457      mPollBufferingGeneration(0),
1458      mPrepareBuffering(false),
1459      mBuffering(false),
1460      mPrevBufferPercentage(-1),
1461      mOffloadAudio(false),
1462      mFirstDequeuedBufferRealUs(-1ll),
1463      mFirstDequeuedBufferMediaUs(-1ll),
1464      mlastDequeuedBufferMediaUs(-1ll) {
1465      getDefaultBufferingSettings(&mSettings);
1466}
1467
1468NuPlayer::GenericSource::BufferingMonitor::~BufferingMonitor() {
1469}
1470
1471void NuPlayer::GenericSource::BufferingMonitor::getDefaultBufferingSettings(
1472        BufferingSettings *buffering /* nonnull */) {
1473    buffering->mInitialBufferingMode = BUFFERING_MODE_TIME_ONLY;
1474    buffering->mRebufferingMode = BUFFERING_MODE_TIME_THEN_SIZE;
1475    buffering->mInitialWatermarkMs = kHighWaterMarkMs;
1476    buffering->mRebufferingWatermarkLowMs = kLowWaterMarkMs;
1477    buffering->mRebufferingWatermarkHighMs = kHighWaterMarkRebufferMs;
1478    buffering->mRebufferingWatermarkLowKB = kLowWaterMarkKB;
1479    buffering->mRebufferingWatermarkHighKB = kHighWaterMarkKB;
1480}
1481
1482status_t NuPlayer::GenericSource::BufferingMonitor::setBufferingSettings(
1483        const BufferingSettings &buffering) {
1484    Mutex::Autolock _l(mLock);
1485    if (buffering.IsSizeBasedBufferingMode(buffering.mInitialBufferingMode)
1486            || (buffering.IsTimeBasedBufferingMode(buffering.mRebufferingMode)
1487                && buffering.mRebufferingWatermarkLowMs > buffering.mRebufferingWatermarkHighMs)
1488            || (buffering.IsSizeBasedBufferingMode(buffering.mRebufferingMode)
1489                && buffering.mRebufferingWatermarkLowKB > buffering.mRebufferingWatermarkHighKB)) {
1490        return BAD_VALUE;
1491    }
1492    mSettings = buffering;
1493    if (mSettings.mInitialBufferingMode == BUFFERING_MODE_NONE) {
1494        mSettings.mInitialWatermarkMs = BufferingSettings::kNoWatermark;
1495    }
1496    if (!mSettings.IsTimeBasedBufferingMode(mSettings.mRebufferingMode)) {
1497        mSettings.mRebufferingWatermarkLowMs = BufferingSettings::kNoWatermark;
1498        mSettings.mRebufferingWatermarkHighMs = INT32_MAX;
1499    }
1500    if (!mSettings.IsSizeBasedBufferingMode(mSettings.mRebufferingMode)) {
1501        mSettings.mRebufferingWatermarkLowKB = BufferingSettings::kNoWatermark;
1502        mSettings.mRebufferingWatermarkHighKB = INT32_MAX;
1503    }
1504    return OK;
1505}
1506
1507void NuPlayer::GenericSource::BufferingMonitor::prepare(
1508        const sp<NuCachedSource2> &cachedSource,
1509        int64_t durationUs,
1510        int64_t bitrate,
1511        bool isStreaming) {
1512    Mutex::Autolock _l(mLock);
1513    prepare_l(cachedSource, durationUs, bitrate, isStreaming);
1514}
1515
1516void NuPlayer::GenericSource::BufferingMonitor::stop() {
1517    Mutex::Autolock _l(mLock);
1518    prepare_l(NULL /* cachedSource */, -1 /* durationUs */,
1519            -1 /* bitrate */, false /* isStreaming */);
1520}
1521
1522void NuPlayer::GenericSource::BufferingMonitor::cancelPollBuffering() {
1523    Mutex::Autolock _l(mLock);
1524    cancelPollBuffering_l();
1525}
1526
1527void NuPlayer::GenericSource::BufferingMonitor::restartPollBuffering() {
1528    Mutex::Autolock _l(mLock);
1529    if (mIsStreaming) {
1530        cancelPollBuffering_l();
1531        onPollBuffering_l();
1532    }
1533}
1534
1535void NuPlayer::GenericSource::BufferingMonitor::stopBufferingIfNecessary() {
1536    Mutex::Autolock _l(mLock);
1537    stopBufferingIfNecessary_l();
1538}
1539
1540void NuPlayer::GenericSource::BufferingMonitor::ensureCacheIsFetching() {
1541    Mutex::Autolock _l(mLock);
1542    ensureCacheIsFetching_l();
1543}
1544
1545void NuPlayer::GenericSource::BufferingMonitor::updateQueuedTime(bool isAudio, int64_t timeUs) {
1546    Mutex::Autolock _l(mLock);
1547    if (isAudio) {
1548        mAudioTimeUs = timeUs;
1549    } else {
1550        mVideoTimeUs = timeUs;
1551    }
1552}
1553
1554void NuPlayer::GenericSource::BufferingMonitor::setOffloadAudio(bool offload) {
1555    Mutex::Autolock _l(mLock);
1556    mOffloadAudio = offload;
1557}
1558
1559void NuPlayer::GenericSource::BufferingMonitor::updateDequeuedBufferTime(int64_t mediaUs) {
1560    Mutex::Autolock _l(mLock);
1561    if (mediaUs < 0) {
1562        mFirstDequeuedBufferRealUs = -1ll;
1563        mFirstDequeuedBufferMediaUs = -1ll;
1564    } else if (mFirstDequeuedBufferRealUs < 0) {
1565        mFirstDequeuedBufferRealUs = ALooper::GetNowUs();
1566        mFirstDequeuedBufferMediaUs = mediaUs;
1567    }
1568    mlastDequeuedBufferMediaUs = mediaUs;
1569}
1570
1571void NuPlayer::GenericSource::BufferingMonitor::prepare_l(
1572        const sp<NuCachedSource2> &cachedSource,
1573        int64_t durationUs,
1574        int64_t bitrate,
1575        bool isStreaming) {
1576
1577    mCachedSource = cachedSource;
1578    mDurationUs = durationUs;
1579    mBitrate = bitrate;
1580    mIsStreaming = isStreaming;
1581    mAudioTimeUs = 0;
1582    mVideoTimeUs = 0;
1583    mPrepareBuffering = (cachedSource != NULL);
1584    cancelPollBuffering_l();
1585    mOffloadAudio = false;
1586    mFirstDequeuedBufferRealUs = -1ll;
1587    mFirstDequeuedBufferMediaUs = -1ll;
1588    mlastDequeuedBufferMediaUs = -1ll;
1589}
1590
1591void NuPlayer::GenericSource::BufferingMonitor::cancelPollBuffering_l() {
1592    mBuffering = false;
1593    ++mPollBufferingGeneration;
1594    mPrevBufferPercentage = -1;
1595}
1596
1597void NuPlayer::GenericSource::BufferingMonitor::notifyBufferingUpdate_l(int32_t percentage) {
1598    // Buffering percent could go backward as it's estimated from remaining
1599    // data and last access time. This could cause the buffering position
1600    // drawn on media control to jitter slightly. Remember previously reported
1601    // percentage and don't allow it to go backward.
1602    if (percentage < mPrevBufferPercentage) {
1603        percentage = mPrevBufferPercentage;
1604    } else if (percentage > 100) {
1605        percentage = 100;
1606    }
1607
1608    mPrevBufferPercentage = percentage;
1609
1610    ALOGV("notifyBufferingUpdate_l: buffering %d%%", percentage);
1611
1612    sp<AMessage> msg = mNotify->dup();
1613    msg->setInt32("what", kWhatBufferingUpdate);
1614    msg->setInt32("percentage", percentage);
1615    msg->post();
1616}
1617
1618void NuPlayer::GenericSource::BufferingMonitor::startBufferingIfNecessary_l() {
1619    if (mPrepareBuffering) {
1620        return;
1621    }
1622
1623    if (!mBuffering) {
1624        ALOGD("startBufferingIfNecessary_l");
1625
1626        mBuffering = true;
1627
1628        ensureCacheIsFetching_l();
1629        sendCacheStats_l();
1630
1631        sp<AMessage> notify = mNotify->dup();
1632        notify->setInt32("what", kWhatPauseOnBufferingStart);
1633        notify->post();
1634    }
1635}
1636
1637void NuPlayer::GenericSource::BufferingMonitor::stopBufferingIfNecessary_l() {
1638    if (mPrepareBuffering) {
1639        ALOGD("stopBufferingIfNecessary_l, mBuffering=%d", mBuffering);
1640
1641        mPrepareBuffering = false;
1642
1643        sp<AMessage> notify = mNotify->dup();
1644        notify->setInt32("what", kWhatPrepared);
1645        notify->setInt32("err", OK);
1646        notify->post();
1647
1648        return;
1649    }
1650
1651    if (mBuffering) {
1652        ALOGD("stopBufferingIfNecessary_l");
1653        mBuffering = false;
1654
1655        sendCacheStats_l();
1656
1657        sp<AMessage> notify = mNotify->dup();
1658        notify->setInt32("what", kWhatResumeOnBufferingEnd);
1659        notify->post();
1660    }
1661}
1662
1663void NuPlayer::GenericSource::BufferingMonitor::sendCacheStats_l() {
1664    int32_t kbps = 0;
1665    status_t err = UNKNOWN_ERROR;
1666
1667    if (mCachedSource != NULL) {
1668        err = mCachedSource->getEstimatedBandwidthKbps(&kbps);
1669    }
1670
1671    if (err == OK) {
1672        sp<AMessage> notify = mNotify->dup();
1673        notify->setInt32("what", kWhatCacheStats);
1674        notify->setInt32("bandwidth", kbps);
1675        notify->post();
1676    }
1677}
1678
1679void NuPlayer::GenericSource::BufferingMonitor::ensureCacheIsFetching_l() {
1680    if (mCachedSource != NULL) {
1681        mCachedSource->resumeFetchingIfNecessary();
1682    }
1683}
1684
1685void NuPlayer::GenericSource::BufferingMonitor::schedulePollBuffering_l() {
1686    sp<AMessage> msg = new AMessage(kWhatPollBuffering, this);
1687    msg->setInt32("generation", mPollBufferingGeneration);
1688    // Enquires buffering status every second.
1689    msg->post(1000000ll);
1690}
1691
1692int64_t NuPlayer::GenericSource::BufferingMonitor::getLastReadPosition_l() {
1693    if (mAudioTimeUs > 0) {
1694        return mAudioTimeUs;
1695    } else if (mVideoTimeUs > 0) {
1696        return mVideoTimeUs;
1697    } else {
1698        return 0;
1699    }
1700}
1701
1702void NuPlayer::GenericSource::BufferingMonitor::onPollBuffering_l() {
1703    status_t finalStatus = UNKNOWN_ERROR;
1704    int64_t cachedDurationUs = -1ll;
1705    ssize_t cachedDataRemaining = -1;
1706
1707    if (mCachedSource != NULL) {
1708        cachedDataRemaining =
1709                mCachedSource->approxDataRemaining(&finalStatus);
1710
1711        if (finalStatus == OK) {
1712            off64_t size;
1713            int64_t bitrate = 0ll;
1714            if (mDurationUs > 0 && mCachedSource->getSize(&size) == OK) {
1715                // |bitrate| uses bits/second unit, while size is number of bytes.
1716                bitrate = size * 8000000ll / mDurationUs;
1717            } else if (mBitrate > 0) {
1718                bitrate = mBitrate;
1719            }
1720            if (bitrate > 0) {
1721                cachedDurationUs = cachedDataRemaining * 8000000ll / bitrate;
1722            }
1723        }
1724    }
1725
1726    if (finalStatus != OK) {
1727        ALOGV("onPollBuffering_l: EOS (finalStatus = %d)", finalStatus);
1728
1729        if (finalStatus == ERROR_END_OF_STREAM) {
1730            notifyBufferingUpdate_l(100);
1731        }
1732
1733        stopBufferingIfNecessary_l();
1734        return;
1735    }
1736
1737    if (cachedDurationUs >= 0ll) {
1738        if (mDurationUs > 0ll) {
1739            int64_t cachedPosUs = getLastReadPosition_l() + cachedDurationUs;
1740            int percentage = 100.0 * cachedPosUs / mDurationUs;
1741            if (percentage > 100) {
1742                percentage = 100;
1743            }
1744
1745            notifyBufferingUpdate_l(percentage);
1746        }
1747
1748        ALOGV("onPollBuffering_l: cachedDurationUs %.1f sec", cachedDurationUs / 1000000.0f);
1749
1750        if (mPrepareBuffering) {
1751            if (cachedDurationUs > mSettings.mInitialWatermarkMs * 1000) {
1752                stopBufferingIfNecessary_l();
1753            }
1754        } else if (mSettings.IsTimeBasedBufferingMode(mSettings.mRebufferingMode)) {
1755            if (cachedDurationUs < mSettings.mRebufferingWatermarkLowMs * 1000) {
1756                // Take into account the data cached in downstream components to try to avoid
1757                // unnecessary pause.
1758                if (mOffloadAudio && mFirstDequeuedBufferRealUs >= 0) {
1759                    int64_t downStreamCacheUs =
1760                        mlastDequeuedBufferMediaUs - mFirstDequeuedBufferMediaUs
1761                            - (ALooper::GetNowUs() - mFirstDequeuedBufferRealUs);
1762                    if (downStreamCacheUs > 0) {
1763                        cachedDurationUs += downStreamCacheUs;
1764                    }
1765                }
1766
1767                if (cachedDurationUs < mSettings.mRebufferingWatermarkLowMs * 1000) {
1768                    startBufferingIfNecessary_l();
1769                }
1770            } else if (cachedDurationUs > mSettings.mRebufferingWatermarkHighMs * 1000) {
1771                stopBufferingIfNecessary_l();
1772            }
1773        }
1774    } else if (cachedDataRemaining >= 0
1775            && mSettings.IsSizeBasedBufferingMode(mSettings.mRebufferingMode)) {
1776        ALOGV("onPollBuffering_l: cachedDataRemaining %zd bytes",
1777                cachedDataRemaining);
1778
1779        if (cachedDataRemaining < (mSettings.mRebufferingWatermarkLowKB << 10)) {
1780            startBufferingIfNecessary_l();
1781        } else if (cachedDataRemaining > (mSettings.mRebufferingWatermarkHighKB << 10)) {
1782            stopBufferingIfNecessary_l();
1783        }
1784    }
1785
1786    schedulePollBuffering_l();
1787}
1788
1789void NuPlayer::GenericSource::BufferingMonitor::onMessageReceived(const sp<AMessage> &msg) {
1790    switch (msg->what()) {
1791      case kWhatPollBuffering:
1792      {
1793          int32_t generation;
1794          CHECK(msg->findInt32("generation", &generation));
1795          Mutex::Autolock _l(mLock);
1796          if (generation == mPollBufferingGeneration) {
1797              onPollBuffering_l();
1798          }
1799          break;
1800      }
1801      default:
1802          TRESPASS();
1803          break;
1804    }
1805}
1806
1807}  // namespace android
1808