GenericSource.cpp revision 9935bd490fc3c15693156ca5c10d7d533f71d448 
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/WVMExtractor.h"
39#include "../../libstagefright/include/HTTPBase.h"
40
41namespace android {
42
43static int64_t kLowWaterMarkUs = 2000000ll;  // 2secs
44static int64_t kHighWaterMarkUs = 5000000ll;  // 5secs
45static int64_t kHighWaterMarkRebufferUs = 15000000ll;  // 15secs
46static const ssize_t kLowWaterMarkBytes = 40000;
47static const ssize_t kHighWaterMarkBytes = 200000;
48
49NuPlayer::GenericSource::GenericSource(
50        const sp<AMessage> &notify,
51        bool uidValid,
52        uid_t uid)
53    : Source(notify),
54      mAudioTimeUs(0),
55      mAudioLastDequeueTimeUs(0),
56      mVideoTimeUs(0),
57      mVideoLastDequeueTimeUs(0),
58      mFetchSubtitleDataGeneration(0),
59      mFetchTimedTextDataGeneration(0),
60      mDurationUs(-1ll),
61      mAudioIsVorbis(false),
62      mIsWidevine(false),
63      mIsSecure(false),
64      mIsStreaming(false),
65      mUIDValid(uidValid),
66      mUID(uid),
67      mFd(-1),
68      mDrmManagerClient(NULL),
69      mBitrate(-1ll),
70      mPendingReadBufferTypes(0) {
71    mBufferingMonitor = new BufferingMonitor(notify);
72    resetDataSource();
73    DataSource::RegisterDefaultSniffers();
74}
75
76void NuPlayer::GenericSource::resetDataSource() {
77    mHTTPService.clear();
78    mHttpSource.clear();
79    mUri.clear();
80    mUriHeaders.clear();
81    if (mFd >= 0) {
82        close(mFd);
83        mFd = -1;
84    }
85    mOffset = 0;
86    mLength = 0;
87    setDrmPlaybackStatusIfNeeded(Playback::STOP, 0);
88    mDecryptHandle = NULL;
89    mDrmManagerClient = NULL;
90    mStarted = false;
91    mStopRead = true;
92
93    if (mBufferingMonitorLooper != NULL) {
94        mBufferingMonitorLooper->unregisterHandler(mBufferingMonitor->id());
95        mBufferingMonitorLooper->stop();
96        mBufferingMonitorLooper = NULL;
97    }
98    mBufferingMonitor->stop();
99}
100
101status_t NuPlayer::GenericSource::setDataSource(
102        const sp<IMediaHTTPService> &httpService,
103        const char *url,
104        const KeyedVector<String8, String8> *headers) {
105    resetDataSource();
106
107    mHTTPService = httpService;
108    mUri = url;
109
110    if (headers) {
111        mUriHeaders = *headers;
112    }
113
114    // delay data source creation to prepareAsync() to avoid blocking
115    // the calling thread in setDataSource for any significant time.
116    return OK;
117}
118
119status_t NuPlayer::GenericSource::setDataSource(
120        int fd, int64_t offset, int64_t length) {
121    resetDataSource();
122
123    mFd = dup(fd);
124    mOffset = offset;
125    mLength = length;
126
127    // delay data source creation to prepareAsync() to avoid blocking
128    // the calling thread in setDataSource for any significant time.
129    return OK;
130}
131
132status_t NuPlayer::GenericSource::setDataSource(const sp<DataSource>& source) {
133    resetDataSource();
134    mDataSource = source;
135    return OK;
136}
137
138sp<MetaData> NuPlayer::GenericSource::getFileFormatMeta() const {
139    return mFileMeta;
140}
141
142status_t NuPlayer::GenericSource::initFromDataSource() {
143    sp<IMediaExtractor> extractor;
144    String8 mimeType;
145    float confidence;
146    sp<AMessage> dummy;
147    bool isWidevineStreaming = false;
148
149    CHECK(mDataSource != NULL);
150
151    if (mIsWidevine) {
152        isWidevineStreaming = SniffWVM(
153                mDataSource, &mimeType, &confidence, &dummy);
154        if (!isWidevineStreaming ||
155                strcasecmp(
156                    mimeType.string(), MEDIA_MIMETYPE_CONTAINER_WVM)) {
157            ALOGE("unsupported widevine mime: %s", mimeType.string());
158            return UNKNOWN_ERROR;
159        }
160    } else if (mIsStreaming) {
161        if (!mDataSource->sniff(&mimeType, &confidence, &dummy)) {
162            return UNKNOWN_ERROR;
163        }
164        isWidevineStreaming = !strcasecmp(
165                mimeType.string(), MEDIA_MIMETYPE_CONTAINER_WVM);
166    }
167
168    if (isWidevineStreaming) {
169        // we don't want cached source for widevine streaming.
170        mCachedSource.clear();
171        mDataSource = mHttpSource;
172        mWVMExtractor = new WVMExtractor(mDataSource);
173        mWVMExtractor->setAdaptiveStreamingMode(true);
174        if (mUIDValid) {
175            mWVMExtractor->setUID(mUID);
176        }
177        extractor = mWVMExtractor;
178    } else {
179        extractor = MediaExtractor::Create(mDataSource,
180                mimeType.isEmpty() ? NULL : mimeType.string());
181    }
182
183    if (extractor == NULL) {
184        return UNKNOWN_ERROR;
185    }
186
187    if (extractor->getDrmFlag()) {
188        checkDrmStatus(mDataSource);
189    }
190
191    mFileMeta = extractor->getMetaData();
192    if (mFileMeta != NULL) {
193        int64_t duration;
194        if (mFileMeta->findInt64(kKeyDuration, &duration)) {
195            mDurationUs = duration;
196        }
197
198        if (!mIsWidevine) {
199            // Check mime to see if we actually have a widevine source.
200            // If the data source is not URL-type (eg. file source), we
201            // won't be able to tell until now.
202            const char *fileMime;
203            if (mFileMeta->findCString(kKeyMIMEType, &fileMime)
204                    && !strncasecmp(fileMime, "video/wvm", 9)) {
205                mIsWidevine = true;
206            }
207        }
208    }
209
210    int32_t totalBitrate = 0;
211
212    size_t numtracks = extractor->countTracks();
213    if (numtracks == 0) {
214        return UNKNOWN_ERROR;
215    }
216
217    for (size_t i = 0; i < numtracks; ++i) {
218        sp<IMediaSource> track = extractor->getTrack(i);
219        if (track == NULL) {
220            continue;
221        }
222
223        sp<MetaData> meta = extractor->getTrackMetaData(i);
224        if (meta == NULL) {
225            ALOGE("no metadata for track %zu", i);
226            return UNKNOWN_ERROR;
227        }
228
229        const char *mime;
230        CHECK(meta->findCString(kKeyMIMEType, &mime));
231
232        // Do the string compare immediately with "mime",
233        // we can't assume "mime" would stay valid after another
234        // extractor operation, some extractors might modify meta
235        // during getTrack() and make it invalid.
236        if (!strncasecmp(mime, "audio/", 6)) {
237            if (mAudioTrack.mSource == NULL) {
238                mAudioTrack.mIndex = i;
239                mAudioTrack.mSource = track;
240                mAudioTrack.mPackets =
241                    new AnotherPacketSource(mAudioTrack.mSource->getFormat());
242
243                if (!strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_VORBIS)) {
244                    mAudioIsVorbis = true;
245                } else {
246                    mAudioIsVorbis = false;
247                }
248            }
249        } else if (!strncasecmp(mime, "video/", 6)) {
250            if (mVideoTrack.mSource == NULL) {
251                mVideoTrack.mIndex = i;
252                mVideoTrack.mSource = track;
253                mVideoTrack.mPackets =
254                    new AnotherPacketSource(mVideoTrack.mSource->getFormat());
255
256                // check if the source requires secure buffers
257                int32_t secure;
258                if (meta->findInt32(kKeyRequiresSecureBuffers, &secure)
259                        && secure) {
260                    mIsSecure = true;
261                    if (mUIDValid) {
262                        extractor->setUID(mUID);
263                    }
264                }
265            }
266        }
267
268        mSources.push(track);
269        int64_t durationUs;
270        if (meta->findInt64(kKeyDuration, &durationUs)) {
271            if (durationUs > mDurationUs) {
272                mDurationUs = durationUs;
273            }
274        }
275
276        int32_t bitrate;
277        if (totalBitrate >= 0 && meta->findInt32(kKeyBitRate, &bitrate)) {
278            totalBitrate += bitrate;
279        } else {
280            totalBitrate = -1;
281        }
282    }
283
284    if (mSources.size() == 0) {
285        ALOGE("b/23705695");
286        return UNKNOWN_ERROR;
287    }
288
289    mBitrate = totalBitrate;
290
291    return OK;
292}
293
294status_t NuPlayer::GenericSource::startSources() {
295    // Start the selected A/V tracks now before we start buffering.
296    // Widevine sources might re-initialize crypto when starting, if we delay
297    // this to start(), all data buffered during prepare would be wasted.
298    // (We don't actually start reading until start().)
299    if (mAudioTrack.mSource != NULL && mAudioTrack.mSource->start() != OK) {
300        ALOGE("failed to start audio track!");
301        return UNKNOWN_ERROR;
302    }
303
304    if (mVideoTrack.mSource != NULL && mVideoTrack.mSource->start() != OK) {
305        ALOGE("failed to start video track!");
306        return UNKNOWN_ERROR;
307    }
308
309    return OK;
310}
311
312void NuPlayer::GenericSource::checkDrmStatus(const sp<DataSource>& dataSource) {
313    dataSource->getDrmInfo(mDecryptHandle, &mDrmManagerClient);
314    if (mDecryptHandle != NULL) {
315        CHECK(mDrmManagerClient);
316        if (RightsStatus::RIGHTS_VALID != mDecryptHandle->status) {
317            sp<AMessage> msg = dupNotify();
318            msg->setInt32("what", kWhatDrmNoLicense);
319            msg->post();
320        }
321    }
322}
323
324int64_t NuPlayer::GenericSource::getLastReadPosition() {
325    if (mAudioTrack.mSource != NULL) {
326        return mAudioTimeUs;
327    } else if (mVideoTrack.mSource != NULL) {
328        return mVideoTimeUs;
329    } else {
330        return 0;
331    }
332}
333
334status_t NuPlayer::GenericSource::setBuffers(
335        bool audio, Vector<MediaBuffer *> &buffers) {
336    if (mIsSecure && !audio && mVideoTrack.mSource != NULL) {
337        return mVideoTrack.mSource->setBuffers(buffers);
338    }
339    return INVALID_OPERATION;
340}
341
342bool NuPlayer::GenericSource::isStreaming() const {
343    return mIsStreaming;
344}
345
346void NuPlayer::GenericSource::setOffloadAudio(bool offload) {
347    mBufferingMonitor->setOffloadAudio(offload);
348}
349
350NuPlayer::GenericSource::~GenericSource() {
351    if (mLooper != NULL) {
352        mLooper->unregisterHandler(id());
353        mLooper->stop();
354    }
355    resetDataSource();
356}
357
358void NuPlayer::GenericSource::prepareAsync() {
359    if (mLooper == NULL) {
360        mLooper = new ALooper;
361        mLooper->setName("generic");
362        mLooper->start();
363
364        mLooper->registerHandler(this);
365    }
366
367    sp<AMessage> msg = new AMessage(kWhatPrepareAsync, this);
368    msg->post();
369}
370
371void NuPlayer::GenericSource::onPrepareAsync() {
372    // delayed data source creation
373    if (mDataSource == NULL) {
374        // set to false first, if the extractor
375        // comes back as secure, set it to true then.
376        mIsSecure = false;
377
378        if (!mUri.empty()) {
379            const char* uri = mUri.c_str();
380            String8 contentType;
381            mIsWidevine = !strncasecmp(uri, "widevine://", 11);
382
383            if (!strncasecmp("http://", uri, 7)
384                    || !strncasecmp("https://", uri, 8)
385                    || mIsWidevine) {
386                mHttpSource = DataSource::CreateMediaHTTP(mHTTPService);
387                if (mHttpSource == NULL) {
388                    ALOGE("Failed to create http source!");
389                    notifyPreparedAndCleanup(UNKNOWN_ERROR);
390                    return;
391                }
392            }
393
394            mDataSource = DataSource::CreateFromURI(
395                   mHTTPService, uri, &mUriHeaders, &contentType,
396                   static_cast<HTTPBase *>(mHttpSource.get()));
397        } else {
398            mIsWidevine = false;
399
400            mDataSource = new FileSource(mFd, mOffset, mLength);
401            mFd = -1;
402        }
403
404        if (mDataSource == NULL) {
405            ALOGE("Failed to create data source!");
406            notifyPreparedAndCleanup(UNKNOWN_ERROR);
407            return;
408        }
409    }
410
411    if (mDataSource->flags() & DataSource::kIsCachingDataSource) {
412        mCachedSource = static_cast<NuCachedSource2 *>(mDataSource.get());
413    }
414
415    // For widevine or other cached streaming cases, we need to wait for
416    // enough buffering before reporting prepared.
417    // Note that even when URL doesn't start with widevine://, mIsWidevine
418    // could still be set to true later, if the streaming or file source
419    // is sniffed to be widevine. We don't want to buffer for file source
420    // in that case, so must check the flag now.
421    mIsStreaming = (mIsWidevine || mCachedSource != NULL);
422
423    // init extractor from data source
424    status_t err = initFromDataSource();
425
426    if (err != OK) {
427        ALOGE("Failed to init from data source!");
428        notifyPreparedAndCleanup(err);
429        return;
430    }
431
432    if (mVideoTrack.mSource != NULL) {
433        sp<MetaData> meta = doGetFormatMeta(false /* audio */);
434        sp<AMessage> msg = new AMessage;
435        err = convertMetaDataToMessage(meta, &msg);
436        if(err != OK) {
437            notifyPreparedAndCleanup(err);
438            return;
439        }
440        notifyVideoSizeChanged(msg);
441    }
442
443    notifyFlagsChanged(
444            (mIsSecure ? FLAG_SECURE : 0)
445            | (mDecryptHandle != NULL ? FLAG_PROTECTED : 0)
446            | FLAG_CAN_PAUSE
447            | FLAG_CAN_SEEK_BACKWARD
448            | FLAG_CAN_SEEK_FORWARD
449            | FLAG_CAN_SEEK);
450
451    if (mIsSecure) {
452        // secure decoders must be instantiated before starting widevine source
453        sp<AMessage> reply = new AMessage(kWhatSecureDecodersInstantiated, this);
454        notifyInstantiateSecureDecoders(reply);
455    } else {
456        finishPrepareAsync();
457    }
458}
459
460void NuPlayer::GenericSource::onSecureDecodersInstantiated(status_t err) {
461    if (err != OK) {
462        ALOGE("Failed to instantiate secure decoders!");
463        notifyPreparedAndCleanup(err);
464        return;
465    }
466    finishPrepareAsync();
467}
468
469void NuPlayer::GenericSource::finishPrepareAsync() {
470    status_t err = startSources();
471    if (err != OK) {
472        ALOGE("Failed to init start data source!");
473        notifyPreparedAndCleanup(err);
474        return;
475    }
476
477    if (mIsStreaming) {
478        if (mBufferingMonitorLooper == NULL) {
479            mBufferingMonitor->prepare(mCachedSource, mWVMExtractor, mDurationUs, mBitrate,
480                    mIsStreaming);
481
482            mBufferingMonitorLooper = new ALooper;
483            mBufferingMonitorLooper->setName("GSBMonitor");
484            mBufferingMonitorLooper->start();
485            mBufferingMonitorLooper->registerHandler(mBufferingMonitor);
486        }
487
488        mBufferingMonitor->ensureCacheIsFetching();
489        mBufferingMonitor->restartPollBuffering();
490    } else {
491        notifyPrepared();
492    }
493}
494
495void NuPlayer::GenericSource::notifyPreparedAndCleanup(status_t err) {
496    if (err != OK) {
497        {
498            sp<DataSource> dataSource = mDataSource;
499            sp<NuCachedSource2> cachedSource = mCachedSource;
500            sp<DataSource> httpSource = mHttpSource;
501            {
502                Mutex::Autolock _l(mDisconnectLock);
503                mDataSource.clear();
504                mDecryptHandle = NULL;
505                mDrmManagerClient = NULL;
506                mCachedSource.clear();
507                mHttpSource.clear();
508            }
509        }
510        mBitrate = -1;
511
512        mBufferingMonitor->cancelPollBuffering();
513    }
514    notifyPrepared(err);
515}
516
517void NuPlayer::GenericSource::start() {
518    ALOGI("start");
519
520    mStopRead = false;
521    if (mAudioTrack.mSource != NULL) {
522        postReadBuffer(MEDIA_TRACK_TYPE_AUDIO);
523    }
524
525    if (mVideoTrack.mSource != NULL) {
526        postReadBuffer(MEDIA_TRACK_TYPE_VIDEO);
527    }
528
529    setDrmPlaybackStatusIfNeeded(Playback::START, getLastReadPosition() / 1000);
530    mStarted = true;
531
532    (new AMessage(kWhatStart, this))->post();
533}
534
535void NuPlayer::GenericSource::stop() {
536    // nothing to do, just account for DRM playback status
537    setDrmPlaybackStatusIfNeeded(Playback::STOP, 0);
538    mStarted = false;
539    if (mIsWidevine || mIsSecure) {
540        // For widevine or secure sources we need to prevent any further reads.
541        sp<AMessage> msg = new AMessage(kWhatStopWidevine, this);
542        sp<AMessage> response;
543        (void) msg->postAndAwaitResponse(&response);
544    }
545}
546
547void NuPlayer::GenericSource::pause() {
548    // nothing to do, just account for DRM playback status
549    setDrmPlaybackStatusIfNeeded(Playback::PAUSE, 0);
550    mStarted = false;
551}
552
553void NuPlayer::GenericSource::resume() {
554    // nothing to do, just account for DRM playback status
555    setDrmPlaybackStatusIfNeeded(Playback::START, getLastReadPosition() / 1000);
556    mStarted = true;
557
558    (new AMessage(kWhatResume, this))->post();
559}
560
561void NuPlayer::GenericSource::disconnect() {
562    sp<DataSource> dataSource, httpSource;
563    {
564        Mutex::Autolock _l(mDisconnectLock);
565        dataSource = mDataSource;
566        httpSource = mHttpSource;
567    }
568
569    if (dataSource != NULL) {
570        // disconnect data source
571        if (dataSource->flags() & DataSource::kIsCachingDataSource) {
572            static_cast<NuCachedSource2 *>(dataSource.get())->disconnect();
573        }
574    } else if (httpSource != NULL) {
575        static_cast<HTTPBase *>(httpSource.get())->disconnect();
576    }
577}
578
579void NuPlayer::GenericSource::setDrmPlaybackStatusIfNeeded(int playbackStatus, int64_t position) {
580    if (mDecryptHandle != NULL) {
581        mDrmManagerClient->setPlaybackStatus(mDecryptHandle, playbackStatus, position);
582    }
583    mSubtitleTrack.mPackets = new AnotherPacketSource(NULL);
584    mTimedTextTrack.mPackets = new AnotherPacketSource(NULL);
585}
586
587status_t NuPlayer::GenericSource::feedMoreTSData() {
588    return OK;
589}
590
591void NuPlayer::GenericSource::onMessageReceived(const sp<AMessage> &msg) {
592    switch (msg->what()) {
593      case kWhatPrepareAsync:
594      {
595          onPrepareAsync();
596          break;
597      }
598      case kWhatFetchSubtitleData:
599      {
600          fetchTextData(kWhatSendSubtitleData, MEDIA_TRACK_TYPE_SUBTITLE,
601                  mFetchSubtitleDataGeneration, mSubtitleTrack.mPackets, msg);
602          break;
603      }
604
605      case kWhatFetchTimedTextData:
606      {
607          fetchTextData(kWhatSendTimedTextData, MEDIA_TRACK_TYPE_TIMEDTEXT,
608                  mFetchTimedTextDataGeneration, mTimedTextTrack.mPackets, msg);
609          break;
610      }
611
612      case kWhatSendSubtitleData:
613      {
614          sendTextData(kWhatSubtitleData, MEDIA_TRACK_TYPE_SUBTITLE,
615                  mFetchSubtitleDataGeneration, mSubtitleTrack.mPackets, msg);
616          break;
617      }
618
619      case kWhatSendGlobalTimedTextData:
620      {
621          sendGlobalTextData(kWhatTimedTextData, mFetchTimedTextDataGeneration, msg);
622          break;
623      }
624      case kWhatSendTimedTextData:
625      {
626          sendTextData(kWhatTimedTextData, MEDIA_TRACK_TYPE_TIMEDTEXT,
627                  mFetchTimedTextDataGeneration, mTimedTextTrack.mPackets, msg);
628          break;
629      }
630
631      case kWhatChangeAVSource:
632      {
633          int32_t trackIndex;
634          CHECK(msg->findInt32("trackIndex", &trackIndex));
635          const sp<IMediaSource> source = mSources.itemAt(trackIndex);
636
637          Track* track;
638          const char *mime;
639          media_track_type trackType, counterpartType;
640          sp<MetaData> meta = source->getFormat();
641          meta->findCString(kKeyMIMEType, &mime);
642          if (!strncasecmp(mime, "audio/", 6)) {
643              track = &mAudioTrack;
644              trackType = MEDIA_TRACK_TYPE_AUDIO;
645              counterpartType = MEDIA_TRACK_TYPE_VIDEO;;
646          } else {
647              CHECK(!strncasecmp(mime, "video/", 6));
648              track = &mVideoTrack;
649              trackType = MEDIA_TRACK_TYPE_VIDEO;
650              counterpartType = MEDIA_TRACK_TYPE_AUDIO;;
651          }
652
653
654          if (track->mSource != NULL) {
655              track->mSource->stop();
656          }
657          track->mSource = source;
658          track->mSource->start();
659          track->mIndex = trackIndex;
660
661          int64_t timeUs, actualTimeUs;
662          const bool formatChange = true;
663          if (trackType == MEDIA_TRACK_TYPE_AUDIO) {
664              timeUs = mAudioLastDequeueTimeUs;
665          } else {
666              timeUs = mVideoLastDequeueTimeUs;
667          }
668          readBuffer(trackType, timeUs, &actualTimeUs, formatChange);
669          readBuffer(counterpartType, -1, NULL, formatChange);
670          ALOGV("timeUs %lld actualTimeUs %lld", (long long)timeUs, (long long)actualTimeUs);
671
672          break;
673      }
674
675      case kWhatStart:
676      case kWhatResume:
677      {
678          mBufferingMonitor->restartPollBuffering();
679          break;
680      }
681
682      case kWhatGetFormat:
683      {
684          onGetFormatMeta(msg);
685          break;
686      }
687
688      case kWhatGetSelectedTrack:
689      {
690          onGetSelectedTrack(msg);
691          break;
692      }
693
694      case kWhatGetTrackInfo:
695      {
696          onGetTrackInfo(msg);
697          break;
698      }
699
700      case kWhatSelectTrack:
701      {
702          onSelectTrack(msg);
703          break;
704      }
705
706      case kWhatSeek:
707      {
708          onSeek(msg);
709          break;
710      }
711
712      case kWhatReadBuffer:
713      {
714          onReadBuffer(msg);
715          break;
716      }
717
718      case kWhatSecureDecodersInstantiated:
719      {
720          int32_t err;
721          CHECK(msg->findInt32("err", &err));
722          onSecureDecodersInstantiated(err);
723          break;
724      }
725
726      case kWhatStopWidevine:
727      {
728          // mStopRead is only used for Widevine to prevent the video source
729          // from being read while the associated video decoder is shutting down.
730          mStopRead = true;
731          if (mVideoTrack.mSource != NULL) {
732              mVideoTrack.mPackets->clear();
733          }
734          sp<AMessage> response = new AMessage;
735          sp<AReplyToken> replyID;
736          CHECK(msg->senderAwaitsResponse(&replyID));
737          response->postReply(replyID);
738          break;
739      }
740      default:
741          Source::onMessageReceived(msg);
742          break;
743    }
744}
745
746void NuPlayer::GenericSource::fetchTextData(
747        uint32_t sendWhat,
748        media_track_type type,
749        int32_t curGen,
750        const sp<AnotherPacketSource>& packets,
751        const sp<AMessage>& msg) {
752    int32_t msgGeneration;
753    CHECK(msg->findInt32("generation", &msgGeneration));
754    if (msgGeneration != curGen) {
755        // stale
756        return;
757    }
758
759    int32_t avail;
760    if (packets->hasBufferAvailable(&avail)) {
761        return;
762    }
763
764    int64_t timeUs;
765    CHECK(msg->findInt64("timeUs", &timeUs));
766
767    int64_t subTimeUs;
768    readBuffer(type, timeUs, &subTimeUs);
769
770    int64_t delayUs = subTimeUs - timeUs;
771    if (msg->what() == kWhatFetchSubtitleData) {
772        const int64_t oneSecUs = 1000000ll;
773        delayUs -= oneSecUs;
774    }
775    sp<AMessage> msg2 = new AMessage(sendWhat, this);
776    msg2->setInt32("generation", msgGeneration);
777    msg2->post(delayUs < 0 ? 0 : delayUs);
778}
779
780void NuPlayer::GenericSource::sendTextData(
781        uint32_t what,
782        media_track_type type,
783        int32_t curGen,
784        const sp<AnotherPacketSource>& packets,
785        const sp<AMessage>& msg) {
786    int32_t msgGeneration;
787    CHECK(msg->findInt32("generation", &msgGeneration));
788    if (msgGeneration != curGen) {
789        // stale
790        return;
791    }
792
793    int64_t subTimeUs;
794    if (packets->nextBufferTime(&subTimeUs) != OK) {
795        return;
796    }
797
798    int64_t nextSubTimeUs;
799    readBuffer(type, -1, &nextSubTimeUs);
800
801    sp<ABuffer> buffer;
802    status_t dequeueStatus = packets->dequeueAccessUnit(&buffer);
803    if (dequeueStatus == OK) {
804        sp<AMessage> notify = dupNotify();
805        notify->setInt32("what", what);
806        notify->setBuffer("buffer", buffer);
807        notify->post();
808
809        const int64_t delayUs = nextSubTimeUs - subTimeUs;
810        msg->post(delayUs < 0 ? 0 : delayUs);
811    }
812}
813
814void NuPlayer::GenericSource::sendGlobalTextData(
815        uint32_t what,
816        int32_t curGen,
817        sp<AMessage> msg) {
818    int32_t msgGeneration;
819    CHECK(msg->findInt32("generation", &msgGeneration));
820    if (msgGeneration != curGen) {
821        // stale
822        return;
823    }
824
825    uint32_t textType;
826    const void *data;
827    size_t size = 0;
828    if (mTimedTextTrack.mSource->getFormat()->findData(
829                    kKeyTextFormatData, &textType, &data, &size)) {
830        mGlobalTimedText = new ABuffer(size);
831        if (mGlobalTimedText->data()) {
832            memcpy(mGlobalTimedText->data(), data, size);
833            sp<AMessage> globalMeta = mGlobalTimedText->meta();
834            globalMeta->setInt64("timeUs", 0);
835            globalMeta->setString("mime", MEDIA_MIMETYPE_TEXT_3GPP);
836            globalMeta->setInt32("global", 1);
837            sp<AMessage> notify = dupNotify();
838            notify->setInt32("what", what);
839            notify->setBuffer("buffer", mGlobalTimedText);
840            notify->post();
841        }
842    }
843}
844
845sp<MetaData> NuPlayer::GenericSource::getFormatMeta(bool audio) {
846    sp<AMessage> msg = new AMessage(kWhatGetFormat, this);
847    msg->setInt32("audio", audio);
848
849    sp<AMessage> response;
850    sp<RefBase> format;
851    status_t err = msg->postAndAwaitResponse(&response);
852    if (err == OK && response != NULL) {
853        CHECK(response->findObject("format", &format));
854        return static_cast<MetaData*>(format.get());
855    } else {
856        return NULL;
857    }
858}
859
860void NuPlayer::GenericSource::onGetFormatMeta(const sp<AMessage>& msg) const {
861    int32_t audio;
862    CHECK(msg->findInt32("audio", &audio));
863
864    sp<AMessage> response = new AMessage;
865    sp<MetaData> format = doGetFormatMeta(audio);
866    response->setObject("format", format);
867
868    sp<AReplyToken> replyID;
869    CHECK(msg->senderAwaitsResponse(&replyID));
870    response->postReply(replyID);
871}
872
873sp<MetaData> NuPlayer::GenericSource::doGetFormatMeta(bool audio) const {
874    sp<IMediaSource> source = audio ? mAudioTrack.mSource : mVideoTrack.mSource;
875
876    if (source == NULL) {
877        return NULL;
878    }
879
880    return source->getFormat();
881}
882
883status_t NuPlayer::GenericSource::dequeueAccessUnit(
884        bool audio, sp<ABuffer> *accessUnit) {
885    if (audio && !mStarted) {
886        return -EWOULDBLOCK;
887    }
888
889    Track *track = audio ? &mAudioTrack : &mVideoTrack;
890
891    if (track->mSource == NULL) {
892        return -EWOULDBLOCK;
893    }
894
895    if (mIsWidevine && !audio) {
896        // try to read a buffer as we may not have been able to the last time
897        postReadBuffer(MEDIA_TRACK_TYPE_VIDEO);
898    }
899
900    status_t finalResult;
901    if (!track->mPackets->hasBufferAvailable(&finalResult)) {
902        if (finalResult == OK) {
903            postReadBuffer(
904                    audio ? MEDIA_TRACK_TYPE_AUDIO : MEDIA_TRACK_TYPE_VIDEO);
905            return -EWOULDBLOCK;
906        }
907        return finalResult;
908    }
909
910    status_t result = track->mPackets->dequeueAccessUnit(accessUnit);
911
912    // start pulling in more buffers if we only have one (or no) buffer left
913    // so that decoder has less chance of being starved
914    if (track->mPackets->getAvailableBufferCount(&finalResult) < 2) {
915        postReadBuffer(audio? MEDIA_TRACK_TYPE_AUDIO : MEDIA_TRACK_TYPE_VIDEO);
916    }
917
918    if (result != OK) {
919        if (mSubtitleTrack.mSource != NULL) {
920            mSubtitleTrack.mPackets->clear();
921            mFetchSubtitleDataGeneration++;
922        }
923        if (mTimedTextTrack.mSource != NULL) {
924            mTimedTextTrack.mPackets->clear();
925            mFetchTimedTextDataGeneration++;
926        }
927        return result;
928    }
929
930    int64_t timeUs;
931    status_t eosResult; // ignored
932    CHECK((*accessUnit)->meta()->findInt64("timeUs", &timeUs));
933    if (audio) {
934        mAudioLastDequeueTimeUs = timeUs;
935        mBufferingMonitor->updateDequeuedBufferTime(timeUs);
936    } else {
937        mVideoLastDequeueTimeUs = timeUs;
938    }
939
940    if (mSubtitleTrack.mSource != NULL
941            && !mSubtitleTrack.mPackets->hasBufferAvailable(&eosResult)) {
942        sp<AMessage> msg = new AMessage(kWhatFetchSubtitleData, this);
943        msg->setInt64("timeUs", timeUs);
944        msg->setInt32("generation", mFetchSubtitleDataGeneration);
945        msg->post();
946    }
947
948    if (mTimedTextTrack.mSource != NULL
949            && !mTimedTextTrack.mPackets->hasBufferAvailable(&eosResult)) {
950        sp<AMessage> msg = new AMessage(kWhatFetchTimedTextData, this);
951        msg->setInt64("timeUs", timeUs);
952        msg->setInt32("generation", mFetchTimedTextDataGeneration);
953        msg->post();
954    }
955
956    return result;
957}
958
959status_t NuPlayer::GenericSource::getDuration(int64_t *durationUs) {
960    *durationUs = mDurationUs;
961    return OK;
962}
963
964size_t NuPlayer::GenericSource::getTrackCount() const {
965    return mSources.size();
966}
967
968sp<AMessage> NuPlayer::GenericSource::getTrackInfo(size_t trackIndex) const {
969    sp<AMessage> msg = new AMessage(kWhatGetTrackInfo, this);
970    msg->setSize("trackIndex", trackIndex);
971
972    sp<AMessage> response;
973    sp<RefBase> format;
974    status_t err = msg->postAndAwaitResponse(&response);
975    if (err == OK && response != NULL) {
976        CHECK(response->findObject("format", &format));
977        return static_cast<AMessage*>(format.get());
978    } else {
979        return NULL;
980    }
981}
982
983void NuPlayer::GenericSource::onGetTrackInfo(const sp<AMessage>& msg) const {
984    size_t trackIndex;
985    CHECK(msg->findSize("trackIndex", &trackIndex));
986
987    sp<AMessage> response = new AMessage;
988    sp<AMessage> format = doGetTrackInfo(trackIndex);
989    response->setObject("format", format);
990
991    sp<AReplyToken> replyID;
992    CHECK(msg->senderAwaitsResponse(&replyID));
993    response->postReply(replyID);
994}
995
996sp<AMessage> NuPlayer::GenericSource::doGetTrackInfo(size_t trackIndex) const {
997    size_t trackCount = mSources.size();
998    if (trackIndex >= trackCount) {
999        return NULL;
1000    }
1001
1002    sp<AMessage> format = new AMessage();
1003    sp<MetaData> meta = mSources.itemAt(trackIndex)->getFormat();
1004    if (meta == NULL) {
1005        ALOGE("no metadata for track %zu", trackIndex);
1006        return NULL;
1007    }
1008
1009    const char *mime;
1010    CHECK(meta->findCString(kKeyMIMEType, &mime));
1011    format->setString("mime", mime);
1012
1013    int32_t trackType;
1014    if (!strncasecmp(mime, "video/", 6)) {
1015        trackType = MEDIA_TRACK_TYPE_VIDEO;
1016    } else if (!strncasecmp(mime, "audio/", 6)) {
1017        trackType = MEDIA_TRACK_TYPE_AUDIO;
1018    } else if (!strcasecmp(mime, MEDIA_MIMETYPE_TEXT_3GPP)) {
1019        trackType = MEDIA_TRACK_TYPE_TIMEDTEXT;
1020    } else {
1021        trackType = MEDIA_TRACK_TYPE_UNKNOWN;
1022    }
1023    format->setInt32("type", trackType);
1024
1025    const char *lang;
1026    if (!meta->findCString(kKeyMediaLanguage, &lang)) {
1027        lang = "und";
1028    }
1029    format->setString("language", lang);
1030
1031    if (trackType == MEDIA_TRACK_TYPE_SUBTITLE) {
1032        int32_t isAutoselect = 1, isDefault = 0, isForced = 0;
1033        meta->findInt32(kKeyTrackIsAutoselect, &isAutoselect);
1034        meta->findInt32(kKeyTrackIsDefault, &isDefault);
1035        meta->findInt32(kKeyTrackIsForced, &isForced);
1036
1037        format->setInt32("auto", !!isAutoselect);
1038        format->setInt32("default", !!isDefault);
1039        format->setInt32("forced", !!isForced);
1040    }
1041
1042    return format;
1043}
1044
1045ssize_t NuPlayer::GenericSource::getSelectedTrack(media_track_type type) const {
1046    sp<AMessage> msg = new AMessage(kWhatGetSelectedTrack, this);
1047    msg->setInt32("type", type);
1048
1049    sp<AMessage> response;
1050    int32_t index;
1051    status_t err = msg->postAndAwaitResponse(&response);
1052    if (err == OK && response != NULL) {
1053        CHECK(response->findInt32("index", &index));
1054        return index;
1055    } else {
1056        return -1;
1057    }
1058}
1059
1060void NuPlayer::GenericSource::onGetSelectedTrack(const sp<AMessage>& msg) const {
1061    int32_t tmpType;
1062    CHECK(msg->findInt32("type", &tmpType));
1063    media_track_type type = (media_track_type)tmpType;
1064
1065    sp<AMessage> response = new AMessage;
1066    ssize_t index = doGetSelectedTrack(type);
1067    response->setInt32("index", index);
1068
1069    sp<AReplyToken> replyID;
1070    CHECK(msg->senderAwaitsResponse(&replyID));
1071    response->postReply(replyID);
1072}
1073
1074ssize_t NuPlayer::GenericSource::doGetSelectedTrack(media_track_type type) const {
1075    const Track *track = NULL;
1076    switch (type) {
1077    case MEDIA_TRACK_TYPE_VIDEO:
1078        track = &mVideoTrack;
1079        break;
1080    case MEDIA_TRACK_TYPE_AUDIO:
1081        track = &mAudioTrack;
1082        break;
1083    case MEDIA_TRACK_TYPE_TIMEDTEXT:
1084        track = &mTimedTextTrack;
1085        break;
1086    case MEDIA_TRACK_TYPE_SUBTITLE:
1087        track = &mSubtitleTrack;
1088        break;
1089    default:
1090        break;
1091    }
1092
1093    if (track != NULL && track->mSource != NULL) {
1094        return track->mIndex;
1095    }
1096
1097    return -1;
1098}
1099
1100status_t NuPlayer::GenericSource::selectTrack(size_t trackIndex, bool select, int64_t timeUs) {
1101    ALOGV("%s track: %zu", select ? "select" : "deselect", trackIndex);
1102    sp<AMessage> msg = new AMessage(kWhatSelectTrack, this);
1103    msg->setInt32("trackIndex", trackIndex);
1104    msg->setInt32("select", select);
1105    msg->setInt64("timeUs", timeUs);
1106
1107    sp<AMessage> response;
1108    status_t err = msg->postAndAwaitResponse(&response);
1109    if (err == OK && response != NULL) {
1110        CHECK(response->findInt32("err", &err));
1111    }
1112
1113    return err;
1114}
1115
1116void NuPlayer::GenericSource::onSelectTrack(const sp<AMessage>& msg) {
1117    int32_t trackIndex, select;
1118    int64_t timeUs;
1119    CHECK(msg->findInt32("trackIndex", &trackIndex));
1120    CHECK(msg->findInt32("select", &select));
1121    CHECK(msg->findInt64("timeUs", &timeUs));
1122
1123    sp<AMessage> response = new AMessage;
1124    status_t err = doSelectTrack(trackIndex, select, timeUs);
1125    response->setInt32("err", err);
1126
1127    sp<AReplyToken> replyID;
1128    CHECK(msg->senderAwaitsResponse(&replyID));
1129    response->postReply(replyID);
1130}
1131
1132status_t NuPlayer::GenericSource::doSelectTrack(size_t trackIndex, bool select, int64_t timeUs) {
1133    if (trackIndex >= mSources.size()) {
1134        return BAD_INDEX;
1135    }
1136
1137    if (!select) {
1138        Track* track = NULL;
1139        if (mSubtitleTrack.mSource != NULL && trackIndex == mSubtitleTrack.mIndex) {
1140            track = &mSubtitleTrack;
1141            mFetchSubtitleDataGeneration++;
1142        } else if (mTimedTextTrack.mSource != NULL && trackIndex == mTimedTextTrack.mIndex) {
1143            track = &mTimedTextTrack;
1144            mFetchTimedTextDataGeneration++;
1145        }
1146        if (track == NULL) {
1147            return INVALID_OPERATION;
1148        }
1149        track->mSource->stop();
1150        track->mSource = NULL;
1151        track->mPackets->clear();
1152        return OK;
1153    }
1154
1155    const sp<IMediaSource> source = mSources.itemAt(trackIndex);
1156    sp<MetaData> meta = source->getFormat();
1157    const char *mime;
1158    CHECK(meta->findCString(kKeyMIMEType, &mime));
1159    if (!strncasecmp(mime, "text/", 5)) {
1160        bool isSubtitle = strcasecmp(mime, MEDIA_MIMETYPE_TEXT_3GPP);
1161        Track *track = isSubtitle ? &mSubtitleTrack : &mTimedTextTrack;
1162        if (track->mSource != NULL && track->mIndex == trackIndex) {
1163            return OK;
1164        }
1165        track->mIndex = trackIndex;
1166        if (track->mSource != NULL) {
1167            track->mSource->stop();
1168        }
1169        track->mSource = mSources.itemAt(trackIndex);
1170        track->mSource->start();
1171        if (track->mPackets == NULL) {
1172            track->mPackets = new AnotherPacketSource(track->mSource->getFormat());
1173        } else {
1174            track->mPackets->clear();
1175            track->mPackets->setFormat(track->mSource->getFormat());
1176
1177        }
1178
1179        if (isSubtitle) {
1180            mFetchSubtitleDataGeneration++;
1181        } else {
1182            mFetchTimedTextDataGeneration++;
1183        }
1184
1185        status_t eosResult; // ignored
1186        if (mSubtitleTrack.mSource != NULL
1187                && !mSubtitleTrack.mPackets->hasBufferAvailable(&eosResult)) {
1188            sp<AMessage> msg = new AMessage(kWhatFetchSubtitleData, this);
1189            msg->setInt64("timeUs", timeUs);
1190            msg->setInt32("generation", mFetchSubtitleDataGeneration);
1191            msg->post();
1192        }
1193
1194        sp<AMessage> msg2 = new AMessage(kWhatSendGlobalTimedTextData, this);
1195        msg2->setInt32("generation", mFetchTimedTextDataGeneration);
1196        msg2->post();
1197
1198        if (mTimedTextTrack.mSource != NULL
1199                && !mTimedTextTrack.mPackets->hasBufferAvailable(&eosResult)) {
1200            sp<AMessage> msg = new AMessage(kWhatFetchTimedTextData, this);
1201            msg->setInt64("timeUs", timeUs);
1202            msg->setInt32("generation", mFetchTimedTextDataGeneration);
1203            msg->post();
1204        }
1205
1206        return OK;
1207    } else if (!strncasecmp(mime, "audio/", 6) || !strncasecmp(mime, "video/", 6)) {
1208        bool audio = !strncasecmp(mime, "audio/", 6);
1209        Track *track = audio ? &mAudioTrack : &mVideoTrack;
1210        if (track->mSource != NULL && track->mIndex == trackIndex) {
1211            return OK;
1212        }
1213
1214        sp<AMessage> msg = new AMessage(kWhatChangeAVSource, this);
1215        msg->setInt32("trackIndex", trackIndex);
1216        msg->post();
1217        return OK;
1218    }
1219
1220    return INVALID_OPERATION;
1221}
1222
1223status_t NuPlayer::GenericSource::seekTo(int64_t seekTimeUs) {
1224    sp<AMessage> msg = new AMessage(kWhatSeek, this);
1225    msg->setInt64("seekTimeUs", seekTimeUs);
1226
1227    sp<AMessage> response;
1228    status_t err = msg->postAndAwaitResponse(&response);
1229    if (err == OK && response != NULL) {
1230        CHECK(response->findInt32("err", &err));
1231    }
1232
1233    return err;
1234}
1235
1236void NuPlayer::GenericSource::onSeek(const sp<AMessage>& msg) {
1237    int64_t seekTimeUs;
1238    CHECK(msg->findInt64("seekTimeUs", &seekTimeUs));
1239
1240    sp<AMessage> response = new AMessage;
1241    status_t err = doSeek(seekTimeUs);
1242    response->setInt32("err", err);
1243
1244    sp<AReplyToken> replyID;
1245    CHECK(msg->senderAwaitsResponse(&replyID));
1246    response->postReply(replyID);
1247}
1248
1249status_t NuPlayer::GenericSource::doSeek(int64_t seekTimeUs) {
1250    mBufferingMonitor->updateDequeuedBufferTime(-1ll);
1251
1252    // If the Widevine source is stopped, do not attempt to read any
1253    // more buffers.
1254    if (mStopRead) {
1255        return INVALID_OPERATION;
1256    }
1257    if (mVideoTrack.mSource != NULL) {
1258        int64_t actualTimeUs;
1259        readBuffer(MEDIA_TRACK_TYPE_VIDEO, seekTimeUs, &actualTimeUs);
1260
1261        seekTimeUs = actualTimeUs;
1262        mVideoLastDequeueTimeUs = seekTimeUs;
1263    }
1264
1265    if (mAudioTrack.mSource != NULL) {
1266        readBuffer(MEDIA_TRACK_TYPE_AUDIO, seekTimeUs);
1267        mAudioLastDequeueTimeUs = seekTimeUs;
1268    }
1269
1270    setDrmPlaybackStatusIfNeeded(Playback::START, seekTimeUs / 1000);
1271    if (!mStarted) {
1272        setDrmPlaybackStatusIfNeeded(Playback::PAUSE, 0);
1273    }
1274
1275    // If currently buffering, post kWhatBufferingEnd first, so that
1276    // NuPlayer resumes. Otherwise, if cache hits high watermark
1277    // before new polling happens, no one will resume the playback.
1278    mBufferingMonitor->stopBufferingIfNecessary();
1279    mBufferingMonitor->restartPollBuffering();
1280
1281    return OK;
1282}
1283
1284sp<ABuffer> NuPlayer::GenericSource::mediaBufferToABuffer(
1285        MediaBuffer* mb,
1286        media_track_type trackType,
1287        int64_t /* seekTimeUs */,
1288        int64_t *actualTimeUs) {
1289    bool audio = trackType == MEDIA_TRACK_TYPE_AUDIO;
1290    size_t outLength = mb->range_length();
1291
1292    if (audio && mAudioIsVorbis) {
1293        outLength += sizeof(int32_t);
1294    }
1295
1296    sp<ABuffer> ab;
1297    if (mIsSecure && !audio) {
1298        // data is already provided in the buffer
1299        ab = new ABuffer(NULL, mb->range_length());
1300        mb->add_ref();
1301        ab->setMediaBufferBase(mb);
1302    } else {
1303        ab = new ABuffer(outLength);
1304        memcpy(ab->data(),
1305               (const uint8_t *)mb->data() + mb->range_offset(),
1306               mb->range_length());
1307    }
1308
1309    if (audio && mAudioIsVorbis) {
1310        int32_t numPageSamples;
1311        if (!mb->meta_data()->findInt32(kKeyValidSamples, &numPageSamples)) {
1312            numPageSamples = -1;
1313        }
1314
1315        uint8_t* abEnd = ab->data() + mb->range_length();
1316        memcpy(abEnd, &numPageSamples, sizeof(numPageSamples));
1317    }
1318
1319    sp<AMessage> meta = ab->meta();
1320
1321    int64_t timeUs;
1322    CHECK(mb->meta_data()->findInt64(kKeyTime, &timeUs));
1323    meta->setInt64("timeUs", timeUs);
1324
1325#if 0
1326    // Temporarily disable pre-roll till we have a full solution to handle
1327    // both single seek and continous seek gracefully.
1328    if (seekTimeUs > timeUs) {
1329        sp<AMessage> extra = new AMessage;
1330        extra->setInt64("resume-at-mediaTimeUs", seekTimeUs);
1331        meta->setMessage("extra", extra);
1332    }
1333#endif
1334
1335    if (trackType == MEDIA_TRACK_TYPE_VIDEO) {
1336        int32_t layerId;
1337        if (mb->meta_data()->findInt32(kKeyTemporalLayerId, &layerId)) {
1338            meta->setInt32("temporal-layer-id", layerId);
1339        }
1340    }
1341
1342    if (trackType == MEDIA_TRACK_TYPE_TIMEDTEXT) {
1343        const char *mime;
1344        CHECK(mTimedTextTrack.mSource != NULL
1345                && mTimedTextTrack.mSource->getFormat()->findCString(kKeyMIMEType, &mime));
1346        meta->setString("mime", mime);
1347    }
1348
1349    int64_t durationUs;
1350    if (mb->meta_data()->findInt64(kKeyDuration, &durationUs)) {
1351        meta->setInt64("durationUs", durationUs);
1352    }
1353
1354    if (trackType == MEDIA_TRACK_TYPE_SUBTITLE) {
1355        meta->setInt32("trackIndex", mSubtitleTrack.mIndex);
1356    }
1357
1358    uint32_t dataType; // unused
1359    const void *seiData;
1360    size_t seiLength;
1361    if (mb->meta_data()->findData(kKeySEI, &dataType, &seiData, &seiLength)) {
1362        sp<ABuffer> sei = ABuffer::CreateAsCopy(seiData, seiLength);;
1363        meta->setBuffer("sei", sei);
1364    }
1365
1366    const void *mpegUserDataPointer;
1367    size_t mpegUserDataLength;
1368    if (mb->meta_data()->findData(
1369            kKeyMpegUserData, &dataType, &mpegUserDataPointer, &mpegUserDataLength)) {
1370        sp<ABuffer> mpegUserData = ABuffer::CreateAsCopy(mpegUserDataPointer, mpegUserDataLength);
1371        meta->setBuffer("mpegUserData", mpegUserData);
1372    }
1373
1374    if (actualTimeUs) {
1375        *actualTimeUs = timeUs;
1376    }
1377
1378    mb->release();
1379    mb = NULL;
1380
1381    return ab;
1382}
1383
1384void NuPlayer::GenericSource::postReadBuffer(media_track_type trackType) {
1385    Mutex::Autolock _l(mReadBufferLock);
1386
1387    if ((mPendingReadBufferTypes & (1 << trackType)) == 0) {
1388        mPendingReadBufferTypes |= (1 << trackType);
1389        sp<AMessage> msg = new AMessage(kWhatReadBuffer, this);
1390        msg->setInt32("trackType", trackType);
1391        msg->post();
1392    }
1393}
1394
1395void NuPlayer::GenericSource::onReadBuffer(const sp<AMessage>& msg) {
1396    int32_t tmpType;
1397    CHECK(msg->findInt32("trackType", &tmpType));
1398    media_track_type trackType = (media_track_type)tmpType;
1399    readBuffer(trackType);
1400    {
1401        // only protect the variable change, as readBuffer may
1402        // take considerable time.
1403        Mutex::Autolock _l(mReadBufferLock);
1404        mPendingReadBufferTypes &= ~(1 << trackType);
1405    }
1406}
1407
1408void NuPlayer::GenericSource::readBuffer(
1409        media_track_type trackType, int64_t seekTimeUs, int64_t *actualTimeUs, bool formatChange) {
1410    // Do not read data if Widevine source is stopped
1411    if (mStopRead) {
1412        return;
1413    }
1414    Track *track;
1415    size_t maxBuffers = 1;
1416    switch (trackType) {
1417        case MEDIA_TRACK_TYPE_VIDEO:
1418            track = &mVideoTrack;
1419            if (mIsWidevine) {
1420                maxBuffers = 2;
1421            } else {
1422                maxBuffers = 8;  // too large of a number may influence seeks
1423            }
1424            break;
1425        case MEDIA_TRACK_TYPE_AUDIO:
1426            track = &mAudioTrack;
1427            if (mIsWidevine) {
1428                maxBuffers = 8;
1429            } else {
1430                maxBuffers = 64;
1431            }
1432            break;
1433        case MEDIA_TRACK_TYPE_SUBTITLE:
1434            track = &mSubtitleTrack;
1435            break;
1436        case MEDIA_TRACK_TYPE_TIMEDTEXT:
1437            track = &mTimedTextTrack;
1438            break;
1439        default:
1440            TRESPASS();
1441    }
1442
1443    if (track->mSource == NULL) {
1444        return;
1445    }
1446
1447    if (actualTimeUs) {
1448        *actualTimeUs = seekTimeUs;
1449    }
1450
1451    MediaSource::ReadOptions options;
1452
1453    bool seeking = false;
1454    if (seekTimeUs >= 0) {
1455        options.setSeekTo(seekTimeUs, MediaSource::ReadOptions::SEEK_PREVIOUS_SYNC);
1456        seeking = true;
1457    }
1458
1459    const bool couldReadMultiple = (!mIsWidevine && track->mSource->supportReadMultiple());
1460
1461    if (mIsWidevine || couldReadMultiple) {
1462        options.setNonBlocking();
1463    }
1464
1465    for (size_t numBuffers = 0; numBuffers < maxBuffers; ) {
1466        Vector<MediaBuffer *> mediaBuffers;
1467        status_t err = NO_ERROR;
1468
1469        if (couldReadMultiple) {
1470            err = track->mSource->readMultiple(
1471                    &mediaBuffers, maxBuffers - numBuffers, &options);
1472        } else {
1473            MediaBuffer *mbuf = NULL;
1474            err = track->mSource->read(&mbuf, &options);
1475            if (err == OK && mbuf != NULL) {
1476                mediaBuffers.push_back(mbuf);
1477            }
1478        }
1479
1480        options.clearNonPersistent();
1481
1482        size_t id = 0;
1483        size_t count = mediaBuffers.size();
1484        for (; id < count; ++id) {
1485            int64_t timeUs;
1486            MediaBuffer *mbuf = mediaBuffers[id];
1487            if (!mbuf->meta_data()->findInt64(kKeyTime, &timeUs)) {
1488                mbuf->meta_data()->dumpToLog();
1489                track->mPackets->signalEOS(ERROR_MALFORMED);
1490                break;
1491            }
1492            if (trackType == MEDIA_TRACK_TYPE_AUDIO) {
1493                mAudioTimeUs = timeUs;
1494                mBufferingMonitor->updateQueuedTime(true /* isAudio */, timeUs);
1495            } else if (trackType == MEDIA_TRACK_TYPE_VIDEO) {
1496                mVideoTimeUs = timeUs;
1497                mBufferingMonitor->updateQueuedTime(false /* isAudio */, timeUs);
1498            }
1499
1500            queueDiscontinuityIfNeeded(seeking, formatChange, trackType, track);
1501
1502            sp<ABuffer> buffer = mediaBufferToABuffer(
1503                    mbuf, trackType, seekTimeUs,
1504                    numBuffers == 0 ? actualTimeUs : NULL);
1505            track->mPackets->queueAccessUnit(buffer);
1506            formatChange = false;
1507            seeking = false;
1508            ++numBuffers;
1509        }
1510        if (id < count) {
1511            // Error, some mediaBuffer doesn't have kKeyTime.
1512            for (; id < count; ++id) {
1513                mediaBuffers[id]->release();
1514            }
1515            break;
1516        }
1517
1518        if (err == WOULD_BLOCK) {
1519            break;
1520        } else if (err == INFO_FORMAT_CHANGED) {
1521#if 0
1522            track->mPackets->queueDiscontinuity(
1523                    ATSParser::DISCONTINUITY_FORMATCHANGE,
1524                    NULL,
1525                    false /* discard */);
1526#endif
1527        } else if (err != OK) {
1528            queueDiscontinuityIfNeeded(seeking, formatChange, trackType, track);
1529            track->mPackets->signalEOS(err);
1530            break;
1531        }
1532    }
1533}
1534
1535void NuPlayer::GenericSource::queueDiscontinuityIfNeeded(
1536        bool seeking, bool formatChange, media_track_type trackType, Track *track) {
1537    // formatChange && seeking: track whose source is changed during selection
1538    // formatChange && !seeking: track whose source is not changed during selection
1539    // !formatChange: normal seek
1540    if ((seeking || formatChange)
1541            && (trackType == MEDIA_TRACK_TYPE_AUDIO
1542            || trackType == MEDIA_TRACK_TYPE_VIDEO)) {
1543        ATSParser::DiscontinuityType type = (formatChange && seeking)
1544                ? ATSParser::DISCONTINUITY_FORMATCHANGE
1545                : ATSParser::DISCONTINUITY_NONE;
1546        track->mPackets->queueDiscontinuity(type, NULL /* extra */, true /* discard */);
1547    }
1548}
1549
1550NuPlayer::GenericSource::BufferingMonitor::BufferingMonitor(const sp<AMessage> &notify)
1551    : mNotify(notify),
1552      mDurationUs(-1ll),
1553      mBitrate(-1ll),
1554      mIsStreaming(false),
1555      mAudioTimeUs(0),
1556      mVideoTimeUs(0),
1557      mPollBufferingGeneration(0),
1558      mPrepareBuffering(false),
1559      mBuffering(false),
1560      mPrevBufferPercentage(-1),
1561      mOffloadAudio(false),
1562      mFirstDequeuedBufferRealUs(-1ll),
1563      mFirstDequeuedBufferMediaUs(-1ll),
1564      mlastDequeuedBufferMediaUs(-1ll) {
1565}
1566
1567NuPlayer::GenericSource::BufferingMonitor::~BufferingMonitor() {
1568}
1569
1570void NuPlayer::GenericSource::BufferingMonitor::prepare(
1571        const sp<NuCachedSource2> &cachedSource,
1572        const sp<WVMExtractor> &wvmExtractor,
1573        int64_t durationUs,
1574        int64_t bitrate,
1575        bool isStreaming) {
1576    Mutex::Autolock _l(mLock);
1577    prepare_l(cachedSource, wvmExtractor, durationUs, bitrate, isStreaming);
1578}
1579
1580void NuPlayer::GenericSource::BufferingMonitor::stop() {
1581    Mutex::Autolock _l(mLock);
1582    prepare_l(NULL /* cachedSource */, NULL /* wvmExtractor */, -1 /* durationUs */,
1583            -1 /* bitrate */, false /* isStreaming */);
1584}
1585
1586void NuPlayer::GenericSource::BufferingMonitor::cancelPollBuffering() {
1587    Mutex::Autolock _l(mLock);
1588    cancelPollBuffering_l();
1589}
1590
1591void NuPlayer::GenericSource::BufferingMonitor::restartPollBuffering() {
1592    Mutex::Autolock _l(mLock);
1593    if (mIsStreaming) {
1594        cancelPollBuffering_l();
1595        onPollBuffering_l();
1596    }
1597}
1598
1599void NuPlayer::GenericSource::BufferingMonitor::stopBufferingIfNecessary() {
1600    Mutex::Autolock _l(mLock);
1601    stopBufferingIfNecessary_l();
1602}
1603
1604void NuPlayer::GenericSource::BufferingMonitor::ensureCacheIsFetching() {
1605    Mutex::Autolock _l(mLock);
1606    ensureCacheIsFetching_l();
1607}
1608
1609void NuPlayer::GenericSource::BufferingMonitor::updateQueuedTime(bool isAudio, int64_t timeUs) {
1610    Mutex::Autolock _l(mLock);
1611    if (isAudio) {
1612        mAudioTimeUs = timeUs;
1613    } else {
1614        mVideoTimeUs = timeUs;
1615    }
1616}
1617
1618void NuPlayer::GenericSource::BufferingMonitor::setOffloadAudio(bool offload) {
1619    Mutex::Autolock _l(mLock);
1620    mOffloadAudio = offload;
1621}
1622
1623void NuPlayer::GenericSource::BufferingMonitor::updateDequeuedBufferTime(int64_t mediaUs) {
1624    Mutex::Autolock _l(mLock);
1625    if (mediaUs < 0) {
1626        mFirstDequeuedBufferRealUs = -1ll;
1627        mFirstDequeuedBufferMediaUs = -1ll;
1628    } else if (mFirstDequeuedBufferRealUs < 0) {
1629        mFirstDequeuedBufferRealUs = ALooper::GetNowUs();
1630        mFirstDequeuedBufferMediaUs = mediaUs;
1631    }
1632    mlastDequeuedBufferMediaUs = mediaUs;
1633}
1634
1635void NuPlayer::GenericSource::BufferingMonitor::prepare_l(
1636        const sp<NuCachedSource2> &cachedSource,
1637        const sp<WVMExtractor> &wvmExtractor,
1638        int64_t durationUs,
1639        int64_t bitrate,
1640        bool isStreaming) {
1641    ALOGW_IF(wvmExtractor != NULL && cachedSource != NULL,
1642            "WVMExtractor and NuCachedSource are both present when "
1643            "BufferingMonitor::prepare_l is called, ignore NuCachedSource");
1644
1645    mCachedSource = cachedSource;
1646    mWVMExtractor = wvmExtractor;
1647    mDurationUs = durationUs;
1648    mBitrate = bitrate;
1649    mIsStreaming = isStreaming;
1650    mAudioTimeUs = 0;
1651    mVideoTimeUs = 0;
1652    mPrepareBuffering = (cachedSource != NULL || wvmExtractor != NULL);
1653    cancelPollBuffering_l();
1654    mOffloadAudio = false;
1655    mFirstDequeuedBufferRealUs = -1ll;
1656    mFirstDequeuedBufferMediaUs = -1ll;
1657    mlastDequeuedBufferMediaUs = -1ll;
1658}
1659
1660void NuPlayer::GenericSource::BufferingMonitor::cancelPollBuffering_l() {
1661    mBuffering = false;
1662    ++mPollBufferingGeneration;
1663    mPrevBufferPercentage = -1;
1664}
1665
1666void NuPlayer::GenericSource::BufferingMonitor::notifyBufferingUpdate_l(int32_t percentage) {
1667    // Buffering percent could go backward as it's estimated from remaining
1668    // data and last access time. This could cause the buffering position
1669    // drawn on media control to jitter slightly. Remember previously reported
1670    // percentage and don't allow it to go backward.
1671    if (percentage < mPrevBufferPercentage) {
1672        percentage = mPrevBufferPercentage;
1673    } else if (percentage > 100) {
1674        percentage = 100;
1675    }
1676
1677    mPrevBufferPercentage = percentage;
1678
1679    ALOGV("notifyBufferingUpdate_l: buffering %d%%", percentage);
1680
1681    sp<AMessage> msg = mNotify->dup();
1682    msg->setInt32("what", kWhatBufferingUpdate);
1683    msg->setInt32("percentage", percentage);
1684    msg->post();
1685}
1686
1687void NuPlayer::GenericSource::BufferingMonitor::startBufferingIfNecessary_l() {
1688    if (mPrepareBuffering) {
1689        return;
1690    }
1691
1692    if (!mBuffering) {
1693        ALOGD("startBufferingIfNecessary_l");
1694
1695        mBuffering = true;
1696
1697        ensureCacheIsFetching_l();
1698        sendCacheStats_l();
1699
1700        sp<AMessage> notify = mNotify->dup();
1701        notify->setInt32("what", kWhatPauseOnBufferingStart);
1702        notify->post();
1703    }
1704}
1705
1706void NuPlayer::GenericSource::BufferingMonitor::stopBufferingIfNecessary_l() {
1707    if (mPrepareBuffering) {
1708        ALOGD("stopBufferingIfNecessary_l, mBuffering=%d", mBuffering);
1709
1710        mPrepareBuffering = false;
1711
1712        sp<AMessage> notify = mNotify->dup();
1713        notify->setInt32("what", kWhatPrepared);
1714        notify->setInt32("err", OK);
1715        notify->post();
1716
1717        return;
1718    }
1719
1720    if (mBuffering) {
1721        ALOGD("stopBufferingIfNecessary_l");
1722        mBuffering = false;
1723
1724        sendCacheStats_l();
1725
1726        sp<AMessage> notify = mNotify->dup();
1727        notify->setInt32("what", kWhatResumeOnBufferingEnd);
1728        notify->post();
1729    }
1730}
1731
1732void NuPlayer::GenericSource::BufferingMonitor::sendCacheStats_l() {
1733    int32_t kbps = 0;
1734    status_t err = UNKNOWN_ERROR;
1735
1736    if (mWVMExtractor != NULL) {
1737        err = mWVMExtractor->getEstimatedBandwidthKbps(&kbps);
1738    } else if (mCachedSource != NULL) {
1739        err = mCachedSource->getEstimatedBandwidthKbps(&kbps);
1740    }
1741
1742    if (err == OK) {
1743        sp<AMessage> notify = mNotify->dup();
1744        notify->setInt32("what", kWhatCacheStats);
1745        notify->setInt32("bandwidth", kbps);
1746        notify->post();
1747    }
1748}
1749
1750void NuPlayer::GenericSource::BufferingMonitor::ensureCacheIsFetching_l() {
1751    if (mCachedSource != NULL) {
1752        mCachedSource->resumeFetchingIfNecessary();
1753    }
1754}
1755
1756void NuPlayer::GenericSource::BufferingMonitor::schedulePollBuffering_l() {
1757    sp<AMessage> msg = new AMessage(kWhatPollBuffering, this);
1758    msg->setInt32("generation", mPollBufferingGeneration);
1759    // Enquires buffering status every second.
1760    msg->post(1000000ll);
1761}
1762
1763int64_t NuPlayer::GenericSource::BufferingMonitor::getLastReadPosition_l() {
1764    if (mAudioTimeUs > 0) {
1765        return mAudioTimeUs;
1766    } else if (mVideoTimeUs > 0) {
1767        return mVideoTimeUs;
1768    } else {
1769        return 0;
1770    }
1771}
1772
1773void NuPlayer::GenericSource::BufferingMonitor::onPollBuffering_l() {
1774    status_t finalStatus = UNKNOWN_ERROR;
1775    int64_t cachedDurationUs = -1ll;
1776    ssize_t cachedDataRemaining = -1;
1777
1778    if (mWVMExtractor != NULL) {
1779        cachedDurationUs =
1780                mWVMExtractor->getCachedDurationUs(&finalStatus);
1781    } else if (mCachedSource != NULL) {
1782        cachedDataRemaining =
1783                mCachedSource->approxDataRemaining(&finalStatus);
1784
1785        if (finalStatus == OK) {
1786            off64_t size;
1787            int64_t bitrate = 0ll;
1788            if (mDurationUs > 0 && mCachedSource->getSize(&size) == OK) {
1789                // |bitrate| uses bits/second unit, while size is number of bytes.
1790                bitrate = size * 8000000ll / mDurationUs;
1791            } else if (mBitrate > 0) {
1792                bitrate = mBitrate;
1793            }
1794            if (bitrate > 0) {
1795                cachedDurationUs = cachedDataRemaining * 8000000ll / bitrate;
1796            }
1797        }
1798    }
1799
1800    if (finalStatus != OK) {
1801        ALOGV("onPollBuffering_l: EOS (finalStatus = %d)", finalStatus);
1802
1803        if (finalStatus == ERROR_END_OF_STREAM) {
1804            notifyBufferingUpdate_l(100);
1805        }
1806
1807        stopBufferingIfNecessary_l();
1808        return;
1809    } else if (cachedDurationUs >= 0ll) {
1810        if (mDurationUs > 0ll) {
1811            int64_t cachedPosUs = getLastReadPosition_l() + cachedDurationUs;
1812            int percentage = 100.0 * cachedPosUs / mDurationUs;
1813            if (percentage > 100) {
1814                percentage = 100;
1815            }
1816
1817            notifyBufferingUpdate_l(percentage);
1818        }
1819
1820        ALOGV("onPollBuffering_l: cachedDurationUs %.1f sec",
1821                cachedDurationUs / 1000000.0f);
1822
1823        if (cachedDurationUs < kLowWaterMarkUs) {
1824            // Take into account the data cached in downstream components to try to avoid
1825            // unnecessary pause.
1826            if (mOffloadAudio && mFirstDequeuedBufferRealUs >= 0) {
1827                int64_t downStreamCacheUs = mlastDequeuedBufferMediaUs - mFirstDequeuedBufferMediaUs
1828                        - (ALooper::GetNowUs() - mFirstDequeuedBufferRealUs);
1829                if (downStreamCacheUs > 0) {
1830                    cachedDurationUs += downStreamCacheUs;
1831                }
1832            }
1833
1834            if (cachedDurationUs < kLowWaterMarkUs) {
1835                startBufferingIfNecessary_l();
1836            }
1837        } else {
1838            int64_t highWaterMark = mPrepareBuffering ? kHighWaterMarkUs : kHighWaterMarkRebufferUs;
1839            if (cachedDurationUs > highWaterMark) {
1840                stopBufferingIfNecessary_l();
1841            }
1842        }
1843    } else if (cachedDataRemaining >= 0) {
1844        ALOGV("onPollBuffering_l: cachedDataRemaining %zd bytes",
1845                cachedDataRemaining);
1846
1847        if (cachedDataRemaining < kLowWaterMarkBytes) {
1848            startBufferingIfNecessary_l();
1849        } else if (cachedDataRemaining > kHighWaterMarkBytes) {
1850            stopBufferingIfNecessary_l();
1851        }
1852    }
1853
1854    schedulePollBuffering_l();
1855}
1856
1857void NuPlayer::GenericSource::BufferingMonitor::onMessageReceived(const sp<AMessage> &msg) {
1858    switch (msg->what()) {
1859      case kWhatPollBuffering:
1860      {
1861          int32_t generation;
1862          CHECK(msg->findInt32("generation", &generation));
1863          Mutex::Autolock _l(mLock);
1864          if (generation == mPollBufferingGeneration) {
1865              onPollBuffering_l();
1866          }
1867          break;
1868      }
1869      default:
1870          TRESPASS();
1871          break;
1872    }
1873}
1874
1875}  // namespace android
1876