GenericSource.cpp revision 29b7dcf6d3cdb97103467dc8106151c6260c239a 
1/*
2 * Copyright (C) 2012 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17//#define LOG_NDEBUG 0
18#define LOG_TAG "GenericSource"
19
20#include "GenericSource.h"
21
22#include "AnotherPacketSource.h"
23
24#include <media/IMediaHTTPService.h>
25#include <media/stagefright/foundation/ABuffer.h>
26#include <media/stagefright/foundation/ADebug.h>
27#include <media/stagefright/foundation/AMessage.h>
28#include <media/stagefright/DataSource.h>
29#include <media/stagefright/FileSource.h>
30#include <media/stagefright/MediaBuffer.h>
31#include <media/stagefright/MediaDefs.h>
32#include <media/stagefright/MediaExtractor.h>
33#include <media/stagefright/MediaSource.h>
34#include <media/stagefright/MetaData.h>
35#include <media/stagefright/Utils.h>
36#include "../../libstagefright/include/DRMExtractor.h"
37#include "../../libstagefright/include/NuCachedSource2.h"
38#include "../../libstagefright/include/HTTPBase.h"
39
40namespace android {
41
42static int64_t kLowWaterMarkUs = 2000000ll;  // 2secs
43static int64_t kHighWaterMarkUs = 5000000ll;  // 5secs
44static int64_t kHighWaterMarkRebufferUs = 15000000ll;  // 15secs
45static const ssize_t kLowWaterMarkBytes = 40000;
46static const ssize_t kHighWaterMarkBytes = 200000;
47
48NuPlayer::GenericSource::GenericSource(
49        const sp<AMessage> &notify,
50        bool uidValid,
51        uid_t uid)
52    : Source(notify),
53      mAudioTimeUs(0),
54      mAudioLastDequeueTimeUs(0),
55      mVideoTimeUs(0),
56      mVideoLastDequeueTimeUs(0),
57      mFetchSubtitleDataGeneration(0),
58      mFetchTimedTextDataGeneration(0),
59      mDurationUs(-1ll),
60      mAudioIsVorbis(false),
61      mIsSecure(false),
62      mIsStreaming(false),
63      mUIDValid(uidValid),
64      mUID(uid),
65      mFd(-1),
66      mDrmManagerClient(NULL),
67      mBitrate(-1ll),
68      mPendingReadBufferTypes(0) {
69    mBufferingMonitor = new BufferingMonitor(notify);
70    resetDataSource();
71    DataSource::RegisterDefaultSniffers();
72}
73
74void NuPlayer::GenericSource::resetDataSource() {
75    mHTTPService.clear();
76    mHttpSource.clear();
77    mUri.clear();
78    mUriHeaders.clear();
79    if (mFd >= 0) {
80        close(mFd);
81        mFd = -1;
82    }
83    mOffset = 0;
84    mLength = 0;
85    setDrmPlaybackStatusIfNeeded(Playback::STOP, 0);
86    mDecryptHandle = NULL;
87    mDrmManagerClient = NULL;
88    mStarted = false;
89    mStopRead = true;
90
91    if (mBufferingMonitorLooper != NULL) {
92        mBufferingMonitorLooper->unregisterHandler(mBufferingMonitor->id());
93        mBufferingMonitorLooper->stop();
94        mBufferingMonitorLooper = NULL;
95    }
96    mBufferingMonitor->stop();
97}
98
99status_t NuPlayer::GenericSource::setDataSource(
100        const sp<IMediaHTTPService> &httpService,
101        const char *url,
102        const KeyedVector<String8, String8> *headers) {
103    resetDataSource();
104
105    mHTTPService = httpService;
106    mUri = url;
107
108    if (headers) {
109        mUriHeaders = *headers;
110    }
111
112    // delay data source creation to prepareAsync() to avoid blocking
113    // the calling thread in setDataSource for any significant time.
114    return OK;
115}
116
117status_t NuPlayer::GenericSource::setDataSource(
118        int fd, int64_t offset, int64_t length) {
119    resetDataSource();
120
121    mFd = dup(fd);
122    mOffset = offset;
123    mLength = length;
124
125    // delay data source creation to prepareAsync() to avoid blocking
126    // the calling thread in setDataSource for any significant time.
127    return OK;
128}
129
130status_t NuPlayer::GenericSource::setDataSource(const sp<DataSource>& source) {
131    resetDataSource();
132    mDataSource = source;
133    return OK;
134}
135
136sp<MetaData> NuPlayer::GenericSource::getFileFormatMeta() const {
137    return mFileMeta;
138}
139
140status_t NuPlayer::GenericSource::initFromDataSource() {
141    sp<IMediaExtractor> extractor;
142    CHECK(mDataSource != NULL);
143
144    extractor = MediaExtractor::Create(mDataSource, NULL);
145
146    if (extractor == NULL) {
147        return UNKNOWN_ERROR;
148    }
149
150    if (extractor->getDrmFlag()) {
151        checkDrmStatus(mDataSource);
152    }
153
154    mFileMeta = extractor->getMetaData();
155    if (mFileMeta != NULL) {
156        int64_t duration;
157        if (mFileMeta->findInt64(kKeyDuration, &duration)) {
158            mDurationUs = duration;
159        }
160    }
161
162    int32_t totalBitrate = 0;
163
164    size_t numtracks = extractor->countTracks();
165    if (numtracks == 0) {
166        return UNKNOWN_ERROR;
167    }
168
169    for (size_t i = 0; i < numtracks; ++i) {
170        sp<IMediaSource> track = extractor->getTrack(i);
171        if (track == NULL) {
172            continue;
173        }
174
175        sp<MetaData> meta = extractor->getTrackMetaData(i);
176        if (meta == NULL) {
177            ALOGE("no metadata for track %zu", i);
178            return UNKNOWN_ERROR;
179        }
180
181        const char *mime;
182        CHECK(meta->findCString(kKeyMIMEType, &mime));
183
184        // Do the string compare immediately with "mime",
185        // we can't assume "mime" would stay valid after another
186        // extractor operation, some extractors might modify meta
187        // during getTrack() and make it invalid.
188        if (!strncasecmp(mime, "audio/", 6)) {
189            if (mAudioTrack.mSource == NULL) {
190                mAudioTrack.mIndex = i;
191                mAudioTrack.mSource = track;
192                mAudioTrack.mPackets =
193                    new AnotherPacketSource(mAudioTrack.mSource->getFormat());
194
195                if (!strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_VORBIS)) {
196                    mAudioIsVorbis = true;
197                } else {
198                    mAudioIsVorbis = false;
199                }
200            }
201        } else if (!strncasecmp(mime, "video/", 6)) {
202            if (mVideoTrack.mSource == NULL) {
203                mVideoTrack.mIndex = i;
204                mVideoTrack.mSource = track;
205                mVideoTrack.mPackets =
206                    new AnotherPacketSource(mVideoTrack.mSource->getFormat());
207
208                // check if the source requires secure buffers
209                int32_t secure;
210                if (meta->findInt32(kKeyRequiresSecureBuffers, &secure)
211                        && secure) {
212                    mIsSecure = true;
213                    if (mUIDValid) {
214                        extractor->setUID(mUID);
215                    }
216                }
217            }
218        }
219
220        mSources.push(track);
221        int64_t durationUs;
222        if (meta->findInt64(kKeyDuration, &durationUs)) {
223            if (durationUs > mDurationUs) {
224                mDurationUs = durationUs;
225            }
226        }
227
228        int32_t bitrate;
229        if (totalBitrate >= 0 && meta->findInt32(kKeyBitRate, &bitrate)) {
230            totalBitrate += bitrate;
231        } else {
232            totalBitrate = -1;
233        }
234    }
235
236    if (mSources.size() == 0) {
237        ALOGE("b/23705695");
238        return UNKNOWN_ERROR;
239    }
240
241    mBitrate = totalBitrate;
242
243    return OK;
244}
245
246status_t NuPlayer::GenericSource::startSources() {
247    // Start the selected A/V tracks now before we start buffering.
248    // Widevine sources might re-initialize crypto when starting, if we delay
249    // this to start(), all data buffered during prepare would be wasted.
250    // (We don't actually start reading until start().)
251    //
252    // TODO: this logic may no longer be relevant after the removal of widevine
253    // support
254    if (mAudioTrack.mSource != NULL && mAudioTrack.mSource->start() != OK) {
255        ALOGE("failed to start audio track!");
256        return UNKNOWN_ERROR;
257    }
258
259    if (mVideoTrack.mSource != NULL && mVideoTrack.mSource->start() != OK) {
260        ALOGE("failed to start video track!");
261        return UNKNOWN_ERROR;
262    }
263
264    return OK;
265}
266
267void NuPlayer::GenericSource::checkDrmStatus(const sp<DataSource>& dataSource) {
268    dataSource->getDrmInfo(mDecryptHandle, &mDrmManagerClient);
269    if (mDecryptHandle != NULL) {
270        CHECK(mDrmManagerClient);
271        if (RightsStatus::RIGHTS_VALID != mDecryptHandle->status) {
272            sp<AMessage> msg = dupNotify();
273            msg->setInt32("what", kWhatDrmNoLicense);
274            msg->post();
275        }
276    }
277}
278
279int64_t NuPlayer::GenericSource::getLastReadPosition() {
280    if (mAudioTrack.mSource != NULL) {
281        return mAudioTimeUs;
282    } else if (mVideoTrack.mSource != NULL) {
283        return mVideoTimeUs;
284    } else {
285        return 0;
286    }
287}
288
289status_t NuPlayer::GenericSource::setBuffers(
290        bool audio, Vector<MediaBuffer *> &buffers) {
291    if (mIsSecure && !audio && mVideoTrack.mSource != NULL) {
292        return mVideoTrack.mSource->setBuffers(buffers);
293    }
294    return INVALID_OPERATION;
295}
296
297bool NuPlayer::GenericSource::isStreaming() const {
298    return mIsStreaming;
299}
300
301void NuPlayer::GenericSource::setOffloadAudio(bool offload) {
302    mBufferingMonitor->setOffloadAudio(offload);
303}
304
305NuPlayer::GenericSource::~GenericSource() {
306    if (mLooper != NULL) {
307        mLooper->unregisterHandler(id());
308        mLooper->stop();
309    }
310    resetDataSource();
311}
312
313void NuPlayer::GenericSource::prepareAsync() {
314    if (mLooper == NULL) {
315        mLooper = new ALooper;
316        mLooper->setName("generic");
317        mLooper->start();
318
319        mLooper->registerHandler(this);
320    }
321
322    sp<AMessage> msg = new AMessage(kWhatPrepareAsync, this);
323    msg->post();
324}
325
326void NuPlayer::GenericSource::onPrepareAsync() {
327    // delayed data source creation
328    if (mDataSource == NULL) {
329        // set to false first, if the extractor
330        // comes back as secure, set it to true then.
331        mIsSecure = false;
332
333        if (!mUri.empty()) {
334            const char* uri = mUri.c_str();
335            String8 contentType;
336
337            if (!strncasecmp("http://", uri, 7) || !strncasecmp("https://", uri, 8)) {
338                mHttpSource = DataSource::CreateMediaHTTP(mHTTPService);
339                if (mHttpSource == NULL) {
340                    ALOGE("Failed to create http source!");
341                    notifyPreparedAndCleanup(UNKNOWN_ERROR);
342                    return;
343                }
344            }
345
346            mDataSource = DataSource::CreateFromURI(
347                   mHTTPService, uri, &mUriHeaders, &contentType,
348                   static_cast<HTTPBase *>(mHttpSource.get()));
349        } else {
350            mDataSource = new FileSource(mFd, mOffset, mLength);
351            mFd = -1;
352        }
353
354        if (mDataSource == NULL) {
355            ALOGE("Failed to create data source!");
356            notifyPreparedAndCleanup(UNKNOWN_ERROR);
357            return;
358        }
359    }
360
361    if (mDataSource->flags() & DataSource::kIsCachingDataSource) {
362        mCachedSource = static_cast<NuCachedSource2 *>(mDataSource.get());
363    }
364
365    // For cached streaming cases, we need to wait for enough
366    // buffering before reporting prepared.
367    mIsStreaming = (mCachedSource != NULL);
368
369    // init extractor from data source
370    status_t err = initFromDataSource();
371
372    if (err != OK) {
373        ALOGE("Failed to init from data source!");
374        notifyPreparedAndCleanup(err);
375        return;
376    }
377
378    if (mVideoTrack.mSource != NULL) {
379        sp<MetaData> meta = doGetFormatMeta(false /* audio */);
380        sp<AMessage> msg = new AMessage;
381        err = convertMetaDataToMessage(meta, &msg);
382        if(err != OK) {
383            notifyPreparedAndCleanup(err);
384            return;
385        }
386        notifyVideoSizeChanged(msg);
387    }
388
389    notifyFlagsChanged(
390            (mIsSecure ? FLAG_SECURE : 0)
391            | (mDecryptHandle != NULL ? FLAG_PROTECTED : 0)
392            | FLAG_CAN_PAUSE
393            | FLAG_CAN_SEEK_BACKWARD
394            | FLAG_CAN_SEEK_FORWARD
395            | FLAG_CAN_SEEK);
396
397    if (mIsSecure) {
398        // secure decoders must be instantiated before starting widevine source
399        //
400        // TODO: mIsSecure and FLAG_SECURE may be obsolete, revisit after
401        // removing widevine
402        sp<AMessage> reply = new AMessage(kWhatSecureDecodersInstantiated, this);
403        notifyInstantiateSecureDecoders(reply);
404    } else {
405        finishPrepareAsync();
406    }
407}
408
409void NuPlayer::GenericSource::onSecureDecodersInstantiated(status_t err) {
410    if (err != OK) {
411        ALOGE("Failed to instantiate secure decoders!");
412        notifyPreparedAndCleanup(err);
413        return;
414    }
415    finishPrepareAsync();
416}
417
418void NuPlayer::GenericSource::finishPrepareAsync() {
419    status_t err = startSources();
420    if (err != OK) {
421        ALOGE("Failed to init start data source!");
422        notifyPreparedAndCleanup(err);
423        return;
424    }
425
426    if (mIsStreaming) {
427        if (mBufferingMonitorLooper == NULL) {
428            mBufferingMonitor->prepare(mCachedSource, mDurationUs, mBitrate,
429                    mIsStreaming);
430
431            mBufferingMonitorLooper = new ALooper;
432            mBufferingMonitorLooper->setName("GSBMonitor");
433            mBufferingMonitorLooper->start();
434            mBufferingMonitorLooper->registerHandler(mBufferingMonitor);
435        }
436
437        mBufferingMonitor->ensureCacheIsFetching();
438        mBufferingMonitor->restartPollBuffering();
439    } else {
440        notifyPrepared();
441    }
442}
443
444void NuPlayer::GenericSource::notifyPreparedAndCleanup(status_t err) {
445    if (err != OK) {
446        {
447            sp<DataSource> dataSource = mDataSource;
448            sp<NuCachedSource2> cachedSource = mCachedSource;
449            sp<DataSource> httpSource = mHttpSource;
450            {
451                Mutex::Autolock _l(mDisconnectLock);
452                mDataSource.clear();
453                mDecryptHandle = NULL;
454                mDrmManagerClient = NULL;
455                mCachedSource.clear();
456                mHttpSource.clear();
457            }
458        }
459        mBitrate = -1;
460
461        mBufferingMonitor->cancelPollBuffering();
462    }
463    notifyPrepared(err);
464}
465
466void NuPlayer::GenericSource::start() {
467    ALOGI("start");
468
469    mStopRead = false;
470    if (mAudioTrack.mSource != NULL) {
471        postReadBuffer(MEDIA_TRACK_TYPE_AUDIO);
472    }
473
474    if (mVideoTrack.mSource != NULL) {
475        postReadBuffer(MEDIA_TRACK_TYPE_VIDEO);
476    }
477
478    setDrmPlaybackStatusIfNeeded(Playback::START, getLastReadPosition() / 1000);
479    mStarted = true;
480
481    (new AMessage(kWhatStart, this))->post();
482}
483
484void NuPlayer::GenericSource::stop() {
485    // nothing to do, just account for DRM playback status
486    setDrmPlaybackStatusIfNeeded(Playback::STOP, 0);
487    mStarted = false;
488}
489
490void NuPlayer::GenericSource::pause() {
491    // nothing to do, just account for DRM playback status
492    setDrmPlaybackStatusIfNeeded(Playback::PAUSE, 0);
493    mStarted = false;
494}
495
496void NuPlayer::GenericSource::resume() {
497    // nothing to do, just account for DRM playback status
498    setDrmPlaybackStatusIfNeeded(Playback::START, getLastReadPosition() / 1000);
499    mStarted = true;
500
501    (new AMessage(kWhatResume, this))->post();
502}
503
504void NuPlayer::GenericSource::disconnect() {
505    sp<DataSource> dataSource, httpSource;
506    {
507        Mutex::Autolock _l(mDisconnectLock);
508        dataSource = mDataSource;
509        httpSource = mHttpSource;
510    }
511
512    if (dataSource != NULL) {
513        // disconnect data source
514        if (dataSource->flags() & DataSource::kIsCachingDataSource) {
515            static_cast<NuCachedSource2 *>(dataSource.get())->disconnect();
516        }
517    } else if (httpSource != NULL) {
518        static_cast<HTTPBase *>(httpSource.get())->disconnect();
519    }
520}
521
522void NuPlayer::GenericSource::setDrmPlaybackStatusIfNeeded(int playbackStatus, int64_t position) {
523    if (mDecryptHandle != NULL) {
524        mDrmManagerClient->setPlaybackStatus(mDecryptHandle, playbackStatus, position);
525    }
526    mSubtitleTrack.mPackets = new AnotherPacketSource(NULL);
527    mTimedTextTrack.mPackets = new AnotherPacketSource(NULL);
528}
529
530status_t NuPlayer::GenericSource::feedMoreTSData() {
531    return OK;
532}
533
534void NuPlayer::GenericSource::onMessageReceived(const sp<AMessage> &msg) {
535    switch (msg->what()) {
536      case kWhatPrepareAsync:
537      {
538          onPrepareAsync();
539          break;
540      }
541      case kWhatFetchSubtitleData:
542      {
543          fetchTextData(kWhatSendSubtitleData, MEDIA_TRACK_TYPE_SUBTITLE,
544                  mFetchSubtitleDataGeneration, mSubtitleTrack.mPackets, msg);
545          break;
546      }
547
548      case kWhatFetchTimedTextData:
549      {
550          fetchTextData(kWhatSendTimedTextData, MEDIA_TRACK_TYPE_TIMEDTEXT,
551                  mFetchTimedTextDataGeneration, mTimedTextTrack.mPackets, msg);
552          break;
553      }
554
555      case kWhatSendSubtitleData:
556      {
557          sendTextData(kWhatSubtitleData, MEDIA_TRACK_TYPE_SUBTITLE,
558                  mFetchSubtitleDataGeneration, mSubtitleTrack.mPackets, msg);
559          break;
560      }
561
562      case kWhatSendGlobalTimedTextData:
563      {
564          sendGlobalTextData(kWhatTimedTextData, mFetchTimedTextDataGeneration, msg);
565          break;
566      }
567      case kWhatSendTimedTextData:
568      {
569          sendTextData(kWhatTimedTextData, MEDIA_TRACK_TYPE_TIMEDTEXT,
570                  mFetchTimedTextDataGeneration, mTimedTextTrack.mPackets, msg);
571          break;
572      }
573
574      case kWhatChangeAVSource:
575      {
576          int32_t trackIndex;
577          CHECK(msg->findInt32("trackIndex", &trackIndex));
578          const sp<IMediaSource> source = mSources.itemAt(trackIndex);
579
580          Track* track;
581          const char *mime;
582          media_track_type trackType, counterpartType;
583          sp<MetaData> meta = source->getFormat();
584          meta->findCString(kKeyMIMEType, &mime);
585          if (!strncasecmp(mime, "audio/", 6)) {
586              track = &mAudioTrack;
587              trackType = MEDIA_TRACK_TYPE_AUDIO;
588              counterpartType = MEDIA_TRACK_TYPE_VIDEO;;
589          } else {
590              CHECK(!strncasecmp(mime, "video/", 6));
591              track = &mVideoTrack;
592              trackType = MEDIA_TRACK_TYPE_VIDEO;
593              counterpartType = MEDIA_TRACK_TYPE_AUDIO;;
594          }
595
596
597          if (track->mSource != NULL) {
598              track->mSource->stop();
599          }
600          track->mSource = source;
601          track->mSource->start();
602          track->mIndex = trackIndex;
603
604          int64_t timeUs, actualTimeUs;
605          const bool formatChange = true;
606          if (trackType == MEDIA_TRACK_TYPE_AUDIO) {
607              timeUs = mAudioLastDequeueTimeUs;
608          } else {
609              timeUs = mVideoLastDequeueTimeUs;
610          }
611          readBuffer(trackType, timeUs, false /* precise */, &actualTimeUs, formatChange);
612          readBuffer(counterpartType, -1, false /* precise */, 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, false /* precise */, &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, false /* precise */, &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, bool precise) {
1114    sp<AMessage> msg = new AMessage(kWhatSeek, this);
1115    msg->setInt64("seekTimeUs", seekTimeUs);
1116    msg->setInt32("precise", precise);
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 precise;
1130    CHECK(msg->findInt64("seekTimeUs", &seekTimeUs));
1131    CHECK(msg->findInt32("precise", &precise));
1132
1133    sp<AMessage> response = new AMessage;
1134    status_t err = doSeek(seekTimeUs, precise);
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, bool precise) {
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, precise, &actualTimeUs);
1156
1157        if (!precise) {
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, bool precise,
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, MediaSource::ReadOptions::SEEK_PREVIOUS_SYNC);
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 && precise && seekTimeUs > timeUs) {
1387                    sp<AMessage> extra = new AMessage;
1388                    extra->setInt64("resume-at-mediaTimeUs", seekTimeUs);
1389                    meta->setMessage("extra", extra);
1390                }
1391            }
1392
1393            track->mPackets->queueAccessUnit(buffer);
1394            formatChange = false;
1395            seeking = false;
1396            ++numBuffers;
1397        }
1398        if (id < count) {
1399            // Error, some mediaBuffer doesn't have kKeyTime.
1400            for (; id < count; ++id) {
1401                mediaBuffers[id]->release();
1402            }
1403            break;
1404        }
1405
1406        if (err == WOULD_BLOCK) {
1407            break;
1408        } else if (err == INFO_FORMAT_CHANGED) {
1409#if 0
1410            track->mPackets->queueDiscontinuity(
1411                    ATSParser::DISCONTINUITY_FORMATCHANGE,
1412                    NULL,
1413                    false /* discard */);
1414#endif
1415        } else if (err != OK) {
1416            queueDiscontinuityIfNeeded(seeking, formatChange, trackType, track);
1417            track->mPackets->signalEOS(err);
1418            break;
1419        }
1420    }
1421}
1422
1423void NuPlayer::GenericSource::queueDiscontinuityIfNeeded(
1424        bool seeking, bool formatChange, media_track_type trackType, Track *track) {
1425    // formatChange && seeking: track whose source is changed during selection
1426    // formatChange && !seeking: track whose source is not changed during selection
1427    // !formatChange: normal seek
1428    if ((seeking || formatChange)
1429            && (trackType == MEDIA_TRACK_TYPE_AUDIO
1430            || trackType == MEDIA_TRACK_TYPE_VIDEO)) {
1431        ATSParser::DiscontinuityType type = (formatChange && seeking)
1432                ? ATSParser::DISCONTINUITY_FORMATCHANGE
1433                : ATSParser::DISCONTINUITY_NONE;
1434        track->mPackets->queueDiscontinuity(type, NULL /* extra */, true /* discard */);
1435    }
1436}
1437
1438NuPlayer::GenericSource::BufferingMonitor::BufferingMonitor(const sp<AMessage> &notify)
1439    : mNotify(notify),
1440      mDurationUs(-1ll),
1441      mBitrate(-1ll),
1442      mIsStreaming(false),
1443      mAudioTimeUs(0),
1444      mVideoTimeUs(0),
1445      mPollBufferingGeneration(0),
1446      mPrepareBuffering(false),
1447      mBuffering(false),
1448      mPrevBufferPercentage(-1),
1449      mOffloadAudio(false),
1450      mFirstDequeuedBufferRealUs(-1ll),
1451      mFirstDequeuedBufferMediaUs(-1ll),
1452      mlastDequeuedBufferMediaUs(-1ll) {
1453}
1454
1455NuPlayer::GenericSource::BufferingMonitor::~BufferingMonitor() {
1456}
1457
1458void NuPlayer::GenericSource::BufferingMonitor::prepare(
1459        const sp<NuCachedSource2> &cachedSource,
1460        int64_t durationUs,
1461        int64_t bitrate,
1462        bool isStreaming) {
1463    Mutex::Autolock _l(mLock);
1464    prepare_l(cachedSource, durationUs, bitrate, isStreaming);
1465}
1466
1467void NuPlayer::GenericSource::BufferingMonitor::stop() {
1468    Mutex::Autolock _l(mLock);
1469    prepare_l(NULL /* cachedSource */, -1 /* durationUs */,
1470            -1 /* bitrate */, false /* isStreaming */);
1471}
1472
1473void NuPlayer::GenericSource::BufferingMonitor::cancelPollBuffering() {
1474    Mutex::Autolock _l(mLock);
1475    cancelPollBuffering_l();
1476}
1477
1478void NuPlayer::GenericSource::BufferingMonitor::restartPollBuffering() {
1479    Mutex::Autolock _l(mLock);
1480    if (mIsStreaming) {
1481        cancelPollBuffering_l();
1482        onPollBuffering_l();
1483    }
1484}
1485
1486void NuPlayer::GenericSource::BufferingMonitor::stopBufferingIfNecessary() {
1487    Mutex::Autolock _l(mLock);
1488    stopBufferingIfNecessary_l();
1489}
1490
1491void NuPlayer::GenericSource::BufferingMonitor::ensureCacheIsFetching() {
1492    Mutex::Autolock _l(mLock);
1493    ensureCacheIsFetching_l();
1494}
1495
1496void NuPlayer::GenericSource::BufferingMonitor::updateQueuedTime(bool isAudio, int64_t timeUs) {
1497    Mutex::Autolock _l(mLock);
1498    if (isAudio) {
1499        mAudioTimeUs = timeUs;
1500    } else {
1501        mVideoTimeUs = timeUs;
1502    }
1503}
1504
1505void NuPlayer::GenericSource::BufferingMonitor::setOffloadAudio(bool offload) {
1506    Mutex::Autolock _l(mLock);
1507    mOffloadAudio = offload;
1508}
1509
1510void NuPlayer::GenericSource::BufferingMonitor::updateDequeuedBufferTime(int64_t mediaUs) {
1511    Mutex::Autolock _l(mLock);
1512    if (mediaUs < 0) {
1513        mFirstDequeuedBufferRealUs = -1ll;
1514        mFirstDequeuedBufferMediaUs = -1ll;
1515    } else if (mFirstDequeuedBufferRealUs < 0) {
1516        mFirstDequeuedBufferRealUs = ALooper::GetNowUs();
1517        mFirstDequeuedBufferMediaUs = mediaUs;
1518    }
1519    mlastDequeuedBufferMediaUs = mediaUs;
1520}
1521
1522void NuPlayer::GenericSource::BufferingMonitor::prepare_l(
1523        const sp<NuCachedSource2> &cachedSource,
1524        int64_t durationUs,
1525        int64_t bitrate,
1526        bool isStreaming) {
1527
1528    mCachedSource = cachedSource;
1529    mDurationUs = durationUs;
1530    mBitrate = bitrate;
1531    mIsStreaming = isStreaming;
1532    mAudioTimeUs = 0;
1533    mVideoTimeUs = 0;
1534    mPrepareBuffering = (cachedSource != NULL);
1535    cancelPollBuffering_l();
1536    mOffloadAudio = false;
1537    mFirstDequeuedBufferRealUs = -1ll;
1538    mFirstDequeuedBufferMediaUs = -1ll;
1539    mlastDequeuedBufferMediaUs = -1ll;
1540}
1541
1542void NuPlayer::GenericSource::BufferingMonitor::cancelPollBuffering_l() {
1543    mBuffering = false;
1544    ++mPollBufferingGeneration;
1545    mPrevBufferPercentage = -1;
1546}
1547
1548void NuPlayer::GenericSource::BufferingMonitor::notifyBufferingUpdate_l(int32_t percentage) {
1549    // Buffering percent could go backward as it's estimated from remaining
1550    // data and last access time. This could cause the buffering position
1551    // drawn on media control to jitter slightly. Remember previously reported
1552    // percentage and don't allow it to go backward.
1553    if (percentage < mPrevBufferPercentage) {
1554        percentage = mPrevBufferPercentage;
1555    } else if (percentage > 100) {
1556        percentage = 100;
1557    }
1558
1559    mPrevBufferPercentage = percentage;
1560
1561    ALOGV("notifyBufferingUpdate_l: buffering %d%%", percentage);
1562
1563    sp<AMessage> msg = mNotify->dup();
1564    msg->setInt32("what", kWhatBufferingUpdate);
1565    msg->setInt32("percentage", percentage);
1566    msg->post();
1567}
1568
1569void NuPlayer::GenericSource::BufferingMonitor::startBufferingIfNecessary_l() {
1570    if (mPrepareBuffering) {
1571        return;
1572    }
1573
1574    if (!mBuffering) {
1575        ALOGD("startBufferingIfNecessary_l");
1576
1577        mBuffering = true;
1578
1579        ensureCacheIsFetching_l();
1580        sendCacheStats_l();
1581
1582        sp<AMessage> notify = mNotify->dup();
1583        notify->setInt32("what", kWhatPauseOnBufferingStart);
1584        notify->post();
1585    }
1586}
1587
1588void NuPlayer::GenericSource::BufferingMonitor::stopBufferingIfNecessary_l() {
1589    if (mPrepareBuffering) {
1590        ALOGD("stopBufferingIfNecessary_l, mBuffering=%d", mBuffering);
1591
1592        mPrepareBuffering = false;
1593
1594        sp<AMessage> notify = mNotify->dup();
1595        notify->setInt32("what", kWhatPrepared);
1596        notify->setInt32("err", OK);
1597        notify->post();
1598
1599        return;
1600    }
1601
1602    if (mBuffering) {
1603        ALOGD("stopBufferingIfNecessary_l");
1604        mBuffering = false;
1605
1606        sendCacheStats_l();
1607
1608        sp<AMessage> notify = mNotify->dup();
1609        notify->setInt32("what", kWhatResumeOnBufferingEnd);
1610        notify->post();
1611    }
1612}
1613
1614void NuPlayer::GenericSource::BufferingMonitor::sendCacheStats_l() {
1615    int32_t kbps = 0;
1616    status_t err = UNKNOWN_ERROR;
1617
1618    if (mCachedSource != NULL) {
1619        err = mCachedSource->getEstimatedBandwidthKbps(&kbps);
1620    }
1621
1622    if (err == OK) {
1623        sp<AMessage> notify = mNotify->dup();
1624        notify->setInt32("what", kWhatCacheStats);
1625        notify->setInt32("bandwidth", kbps);
1626        notify->post();
1627    }
1628}
1629
1630void NuPlayer::GenericSource::BufferingMonitor::ensureCacheIsFetching_l() {
1631    if (mCachedSource != NULL) {
1632        mCachedSource->resumeFetchingIfNecessary();
1633    }
1634}
1635
1636void NuPlayer::GenericSource::BufferingMonitor::schedulePollBuffering_l() {
1637    sp<AMessage> msg = new AMessage(kWhatPollBuffering, this);
1638    msg->setInt32("generation", mPollBufferingGeneration);
1639    // Enquires buffering status every second.
1640    msg->post(1000000ll);
1641}
1642
1643int64_t NuPlayer::GenericSource::BufferingMonitor::getLastReadPosition_l() {
1644    if (mAudioTimeUs > 0) {
1645        return mAudioTimeUs;
1646    } else if (mVideoTimeUs > 0) {
1647        return mVideoTimeUs;
1648    } else {
1649        return 0;
1650    }
1651}
1652
1653void NuPlayer::GenericSource::BufferingMonitor::onPollBuffering_l() {
1654    status_t finalStatus = UNKNOWN_ERROR;
1655    int64_t cachedDurationUs = -1ll;
1656    ssize_t cachedDataRemaining = -1;
1657
1658    if (mCachedSource != NULL) {
1659        cachedDataRemaining =
1660                mCachedSource->approxDataRemaining(&finalStatus);
1661
1662        if (finalStatus == OK) {
1663            off64_t size;
1664            int64_t bitrate = 0ll;
1665            if (mDurationUs > 0 && mCachedSource->getSize(&size) == OK) {
1666                // |bitrate| uses bits/second unit, while size is number of bytes.
1667                bitrate = size * 8000000ll / mDurationUs;
1668            } else if (mBitrate > 0) {
1669                bitrate = mBitrate;
1670            }
1671            if (bitrate > 0) {
1672                cachedDurationUs = cachedDataRemaining * 8000000ll / bitrate;
1673            }
1674        }
1675    }
1676
1677    if (finalStatus != OK) {
1678        ALOGV("onPollBuffering_l: EOS (finalStatus = %d)", finalStatus);
1679
1680        if (finalStatus == ERROR_END_OF_STREAM) {
1681            notifyBufferingUpdate_l(100);
1682        }
1683
1684        stopBufferingIfNecessary_l();
1685        return;
1686    } else if (cachedDurationUs >= 0ll) {
1687        if (mDurationUs > 0ll) {
1688            int64_t cachedPosUs = getLastReadPosition_l() + cachedDurationUs;
1689            int percentage = 100.0 * cachedPosUs / mDurationUs;
1690            if (percentage > 100) {
1691                percentage = 100;
1692            }
1693
1694            notifyBufferingUpdate_l(percentage);
1695        }
1696
1697        ALOGV("onPollBuffering_l: cachedDurationUs %.1f sec",
1698                cachedDurationUs / 1000000.0f);
1699
1700        if (cachedDurationUs < kLowWaterMarkUs) {
1701            // Take into account the data cached in downstream components to try to avoid
1702            // unnecessary pause.
1703            if (mOffloadAudio && mFirstDequeuedBufferRealUs >= 0) {
1704                int64_t downStreamCacheUs = mlastDequeuedBufferMediaUs - mFirstDequeuedBufferMediaUs
1705                        - (ALooper::GetNowUs() - mFirstDequeuedBufferRealUs);
1706                if (downStreamCacheUs > 0) {
1707                    cachedDurationUs += downStreamCacheUs;
1708                }
1709            }
1710
1711            if (cachedDurationUs < kLowWaterMarkUs) {
1712                startBufferingIfNecessary_l();
1713            }
1714        } else {
1715            int64_t highWaterMark = mPrepareBuffering ? kHighWaterMarkUs : kHighWaterMarkRebufferUs;
1716            if (cachedDurationUs > highWaterMark) {
1717                stopBufferingIfNecessary_l();
1718            }
1719        }
1720    } else if (cachedDataRemaining >= 0) {
1721        ALOGV("onPollBuffering_l: cachedDataRemaining %zd bytes",
1722                cachedDataRemaining);
1723
1724        if (cachedDataRemaining < kLowWaterMarkBytes) {
1725            startBufferingIfNecessary_l();
1726        } else if (cachedDataRemaining > kHighWaterMarkBytes) {
1727            stopBufferingIfNecessary_l();
1728        }
1729    }
1730
1731    schedulePollBuffering_l();
1732}
1733
1734void NuPlayer::GenericSource::BufferingMonitor::onMessageReceived(const sp<AMessage> &msg) {
1735    switch (msg->what()) {
1736      case kWhatPollBuffering:
1737      {
1738          int32_t generation;
1739          CHECK(msg->findInt32("generation", &generation));
1740          Mutex::Autolock _l(mLock);
1741          if (generation == mPollBufferingGeneration) {
1742              onPollBuffering_l();
1743          }
1744          break;
1745      }
1746      default:
1747          TRESPASS();
1748          break;
1749    }
1750}
1751
1752}  // namespace android
1753