GenericSource.cpp revision c5de09127e9e0d5df7aa587be317e1487d793245 
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, MediaPlayerSeekMode::SEEK_PREVIOUS_SYNC /* mode */,
669                  &actualTimeUs, formatChange);
670          readBuffer(counterpartType, -1, MediaPlayerSeekMode::SEEK_PREVIOUS_SYNC /* mode */,
671                  NULL, !formatChange);
672          ALOGV("timeUs %lld actualTimeUs %lld", (long long)timeUs, (long long)actualTimeUs);
673
674          break;
675      }
676
677      case kWhatStart:
678      case kWhatResume:
679      {
680          mBufferingMonitor->restartPollBuffering();
681          break;
682      }
683
684      case kWhatGetFormat:
685      {
686          onGetFormatMeta(msg);
687          break;
688      }
689
690      case kWhatGetSelectedTrack:
691      {
692          onGetSelectedTrack(msg);
693          break;
694      }
695
696      case kWhatSelectTrack:
697      {
698          onSelectTrack(msg);
699          break;
700      }
701
702      case kWhatSeek:
703      {
704          onSeek(msg);
705          break;
706      }
707
708      case kWhatReadBuffer:
709      {
710          onReadBuffer(msg);
711          break;
712      }
713
714      case kWhatSecureDecodersInstantiated:
715      {
716          int32_t err;
717          CHECK(msg->findInt32("err", &err));
718          onSecureDecodersInstantiated(err);
719          break;
720      }
721
722      case kWhatStopWidevine:
723      {
724          // mStopRead is only used for Widevine to prevent the video source
725          // from being read while the associated video decoder is shutting down.
726          mStopRead = true;
727          if (mVideoTrack.mSource != NULL) {
728              mVideoTrack.mPackets->clear();
729          }
730          sp<AMessage> response = new AMessage;
731          sp<AReplyToken> replyID;
732          CHECK(msg->senderAwaitsResponse(&replyID));
733          response->postReply(replyID);
734          break;
735      }
736      default:
737          Source::onMessageReceived(msg);
738          break;
739    }
740}
741
742void NuPlayer::GenericSource::fetchTextData(
743        uint32_t sendWhat,
744        media_track_type type,
745        int32_t curGen,
746        const sp<AnotherPacketSource>& packets,
747        const sp<AMessage>& msg) {
748    int32_t msgGeneration;
749    CHECK(msg->findInt32("generation", &msgGeneration));
750    if (msgGeneration != curGen) {
751        // stale
752        return;
753    }
754
755    int32_t avail;
756    if (packets->hasBufferAvailable(&avail)) {
757        return;
758    }
759
760    int64_t timeUs;
761    CHECK(msg->findInt64("timeUs", &timeUs));
762
763    int64_t subTimeUs;
764    readBuffer(type, timeUs, MediaPlayerSeekMode::SEEK_PREVIOUS_SYNC /* mode */, &subTimeUs);
765
766    int64_t delayUs = subTimeUs - timeUs;
767    if (msg->what() == kWhatFetchSubtitleData) {
768        const int64_t oneSecUs = 1000000ll;
769        delayUs -= oneSecUs;
770    }
771    sp<AMessage> msg2 = new AMessage(sendWhat, this);
772    msg2->setInt32("generation", msgGeneration);
773    msg2->post(delayUs < 0 ? 0 : delayUs);
774}
775
776void NuPlayer::GenericSource::sendTextData(
777        uint32_t what,
778        media_track_type type,
779        int32_t curGen,
780        const sp<AnotherPacketSource>& packets,
781        const sp<AMessage>& msg) {
782    int32_t msgGeneration;
783    CHECK(msg->findInt32("generation", &msgGeneration));
784    if (msgGeneration != curGen) {
785        // stale
786        return;
787    }
788
789    int64_t subTimeUs;
790    if (packets->nextBufferTime(&subTimeUs) != OK) {
791        return;
792    }
793
794    int64_t nextSubTimeUs;
795    readBuffer(type, -1, MediaPlayerSeekMode::SEEK_PREVIOUS_SYNC /* mode */, &nextSubTimeUs);
796
797    sp<ABuffer> buffer;
798    status_t dequeueStatus = packets->dequeueAccessUnit(&buffer);
799    if (dequeueStatus == OK) {
800        sp<AMessage> notify = dupNotify();
801        notify->setInt32("what", what);
802        notify->setBuffer("buffer", buffer);
803        notify->post();
804
805        const int64_t delayUs = nextSubTimeUs - subTimeUs;
806        msg->post(delayUs < 0 ? 0 : delayUs);
807    }
808}
809
810void NuPlayer::GenericSource::sendGlobalTextData(
811        uint32_t what,
812        int32_t curGen,
813        sp<AMessage> msg) {
814    int32_t msgGeneration;
815    CHECK(msg->findInt32("generation", &msgGeneration));
816    if (msgGeneration != curGen) {
817        // stale
818        return;
819    }
820
821    uint32_t textType;
822    const void *data;
823    size_t size = 0;
824    if (mTimedTextTrack.mSource->getFormat()->findData(
825                    kKeyTextFormatData, &textType, &data, &size)) {
826        mGlobalTimedText = new ABuffer(size);
827        if (mGlobalTimedText->data()) {
828            memcpy(mGlobalTimedText->data(), data, size);
829            sp<AMessage> globalMeta = mGlobalTimedText->meta();
830            globalMeta->setInt64("timeUs", 0);
831            globalMeta->setString("mime", MEDIA_MIMETYPE_TEXT_3GPP);
832            globalMeta->setInt32("global", 1);
833            sp<AMessage> notify = dupNotify();
834            notify->setInt32("what", what);
835            notify->setBuffer("buffer", mGlobalTimedText);
836            notify->post();
837        }
838    }
839}
840
841sp<MetaData> NuPlayer::GenericSource::getFormatMeta(bool audio) {
842    sp<AMessage> msg = new AMessage(kWhatGetFormat, this);
843    msg->setInt32("audio", audio);
844
845    sp<AMessage> response;
846    sp<RefBase> format;
847    status_t err = msg->postAndAwaitResponse(&response);
848    if (err == OK && response != NULL) {
849        CHECK(response->findObject("format", &format));
850        return static_cast<MetaData*>(format.get());
851    } else {
852        return NULL;
853    }
854}
855
856void NuPlayer::GenericSource::onGetFormatMeta(const sp<AMessage>& msg) const {
857    int32_t audio;
858    CHECK(msg->findInt32("audio", &audio));
859
860    sp<AMessage> response = new AMessage;
861    sp<MetaData> format = doGetFormatMeta(audio);
862    response->setObject("format", format);
863
864    sp<AReplyToken> replyID;
865    CHECK(msg->senderAwaitsResponse(&replyID));
866    response->postReply(replyID);
867}
868
869sp<MetaData> NuPlayer::GenericSource::doGetFormatMeta(bool audio) const {
870    sp<IMediaSource> source = audio ? mAudioTrack.mSource : mVideoTrack.mSource;
871
872    if (source == NULL) {
873        return NULL;
874    }
875
876    return source->getFormat();
877}
878
879status_t NuPlayer::GenericSource::dequeueAccessUnit(
880        bool audio, sp<ABuffer> *accessUnit) {
881    if (audio && !mStarted) {
882        return -EWOULDBLOCK;
883    }
884
885    Track *track = audio ? &mAudioTrack : &mVideoTrack;
886
887    if (track->mSource == NULL) {
888        return -EWOULDBLOCK;
889    }
890
891    if (mIsWidevine && !audio) {
892        // try to read a buffer as we may not have been able to the last time
893        postReadBuffer(MEDIA_TRACK_TYPE_VIDEO);
894    }
895
896    status_t finalResult;
897    if (!track->mPackets->hasBufferAvailable(&finalResult)) {
898        if (finalResult == OK) {
899            postReadBuffer(
900                    audio ? MEDIA_TRACK_TYPE_AUDIO : MEDIA_TRACK_TYPE_VIDEO);
901            return -EWOULDBLOCK;
902        }
903        return finalResult;
904    }
905
906    status_t result = track->mPackets->dequeueAccessUnit(accessUnit);
907
908    // start pulling in more buffers if we only have one (or no) buffer left
909    // so that decoder has less chance of being starved
910    if (track->mPackets->getAvailableBufferCount(&finalResult) < 2) {
911        postReadBuffer(audio? MEDIA_TRACK_TYPE_AUDIO : MEDIA_TRACK_TYPE_VIDEO);
912    }
913
914    if (result != OK) {
915        if (mSubtitleTrack.mSource != NULL) {
916            mSubtitleTrack.mPackets->clear();
917            mFetchSubtitleDataGeneration++;
918        }
919        if (mTimedTextTrack.mSource != NULL) {
920            mTimedTextTrack.mPackets->clear();
921            mFetchTimedTextDataGeneration++;
922        }
923        return result;
924    }
925
926    int64_t timeUs;
927    status_t eosResult; // ignored
928    CHECK((*accessUnit)->meta()->findInt64("timeUs", &timeUs));
929    if (audio) {
930        mAudioLastDequeueTimeUs = timeUs;
931        mBufferingMonitor->updateDequeuedBufferTime(timeUs);
932    } else {
933        mVideoLastDequeueTimeUs = timeUs;
934    }
935
936    if (mSubtitleTrack.mSource != NULL
937            && !mSubtitleTrack.mPackets->hasBufferAvailable(&eosResult)) {
938        sp<AMessage> msg = new AMessage(kWhatFetchSubtitleData, this);
939        msg->setInt64("timeUs", timeUs);
940        msg->setInt32("generation", mFetchSubtitleDataGeneration);
941        msg->post();
942    }
943
944    if (mTimedTextTrack.mSource != NULL
945            && !mTimedTextTrack.mPackets->hasBufferAvailable(&eosResult)) {
946        sp<AMessage> msg = new AMessage(kWhatFetchTimedTextData, this);
947        msg->setInt64("timeUs", timeUs);
948        msg->setInt32("generation", mFetchTimedTextDataGeneration);
949        msg->post();
950    }
951
952    return result;
953}
954
955status_t NuPlayer::GenericSource::getDuration(int64_t *durationUs) {
956    *durationUs = mDurationUs;
957    return OK;
958}
959
960size_t NuPlayer::GenericSource::getTrackCount() const {
961    return mSources.size();
962}
963
964sp<AMessage> NuPlayer::GenericSource::getTrackInfo(size_t trackIndex) const {
965    size_t trackCount = mSources.size();
966    if (trackIndex >= trackCount) {
967        return NULL;
968    }
969
970    sp<AMessage> format = new AMessage();
971    sp<MetaData> meta = mSources.itemAt(trackIndex)->getFormat();
972    if (meta == NULL) {
973        ALOGE("no metadata for track %zu", trackIndex);
974        return NULL;
975    }
976
977    const char *mime;
978    CHECK(meta->findCString(kKeyMIMEType, &mime));
979    format->setString("mime", mime);
980
981    int32_t trackType;
982    if (!strncasecmp(mime, "video/", 6)) {
983        trackType = MEDIA_TRACK_TYPE_VIDEO;
984    } else if (!strncasecmp(mime, "audio/", 6)) {
985        trackType = MEDIA_TRACK_TYPE_AUDIO;
986    } else if (!strcasecmp(mime, MEDIA_MIMETYPE_TEXT_3GPP)) {
987        trackType = MEDIA_TRACK_TYPE_TIMEDTEXT;
988    } else {
989        trackType = MEDIA_TRACK_TYPE_UNKNOWN;
990    }
991    format->setInt32("type", trackType);
992
993    const char *lang;
994    if (!meta->findCString(kKeyMediaLanguage, &lang)) {
995        lang = "und";
996    }
997    format->setString("language", lang);
998
999    if (trackType == MEDIA_TRACK_TYPE_SUBTITLE) {
1000        int32_t isAutoselect = 1, isDefault = 0, isForced = 0;
1001        meta->findInt32(kKeyTrackIsAutoselect, &isAutoselect);
1002        meta->findInt32(kKeyTrackIsDefault, &isDefault);
1003        meta->findInt32(kKeyTrackIsForced, &isForced);
1004
1005        format->setInt32("auto", !!isAutoselect);
1006        format->setInt32("default", !!isDefault);
1007        format->setInt32("forced", !!isForced);
1008    }
1009
1010    return format;
1011}
1012
1013ssize_t NuPlayer::GenericSource::getSelectedTrack(media_track_type type) const {
1014    sp<AMessage> msg = new AMessage(kWhatGetSelectedTrack, this);
1015    msg->setInt32("type", type);
1016
1017    sp<AMessage> response;
1018    int32_t index;
1019    status_t err = msg->postAndAwaitResponse(&response);
1020    if (err == OK && response != NULL) {
1021        CHECK(response->findInt32("index", &index));
1022        return index;
1023    } else {
1024        return -1;
1025    }
1026}
1027
1028void NuPlayer::GenericSource::onGetSelectedTrack(const sp<AMessage>& msg) const {
1029    int32_t tmpType;
1030    CHECK(msg->findInt32("type", &tmpType));
1031    media_track_type type = (media_track_type)tmpType;
1032
1033    sp<AMessage> response = new AMessage;
1034    ssize_t index = doGetSelectedTrack(type);
1035    response->setInt32("index", index);
1036
1037    sp<AReplyToken> replyID;
1038    CHECK(msg->senderAwaitsResponse(&replyID));
1039    response->postReply(replyID);
1040}
1041
1042ssize_t NuPlayer::GenericSource::doGetSelectedTrack(media_track_type type) const {
1043    const Track *track = NULL;
1044    switch (type) {
1045    case MEDIA_TRACK_TYPE_VIDEO:
1046        track = &mVideoTrack;
1047        break;
1048    case MEDIA_TRACK_TYPE_AUDIO:
1049        track = &mAudioTrack;
1050        break;
1051    case MEDIA_TRACK_TYPE_TIMEDTEXT:
1052        track = &mTimedTextTrack;
1053        break;
1054    case MEDIA_TRACK_TYPE_SUBTITLE:
1055        track = &mSubtitleTrack;
1056        break;
1057    default:
1058        break;
1059    }
1060
1061    if (track != NULL && track->mSource != NULL) {
1062        return track->mIndex;
1063    }
1064
1065    return -1;
1066}
1067
1068status_t NuPlayer::GenericSource::selectTrack(size_t trackIndex, bool select, int64_t timeUs) {
1069    ALOGV("%s track: %zu", select ? "select" : "deselect", trackIndex);
1070    sp<AMessage> msg = new AMessage(kWhatSelectTrack, this);
1071    msg->setInt32("trackIndex", trackIndex);
1072    msg->setInt32("select", select);
1073    msg->setInt64("timeUs", timeUs);
1074
1075    sp<AMessage> response;
1076    status_t err = msg->postAndAwaitResponse(&response);
1077    if (err == OK && response != NULL) {
1078        CHECK(response->findInt32("err", &err));
1079    }
1080
1081    return err;
1082}
1083
1084void NuPlayer::GenericSource::onSelectTrack(const sp<AMessage>& msg) {
1085    int32_t trackIndex, select;
1086    int64_t timeUs;
1087    CHECK(msg->findInt32("trackIndex", &trackIndex));
1088    CHECK(msg->findInt32("select", &select));
1089    CHECK(msg->findInt64("timeUs", &timeUs));
1090
1091    sp<AMessage> response = new AMessage;
1092    status_t err = doSelectTrack(trackIndex, select, timeUs);
1093    response->setInt32("err", err);
1094
1095    sp<AReplyToken> replyID;
1096    CHECK(msg->senderAwaitsResponse(&replyID));
1097    response->postReply(replyID);
1098}
1099
1100status_t NuPlayer::GenericSource::doSelectTrack(size_t trackIndex, bool select, int64_t timeUs) {
1101    if (trackIndex >= mSources.size()) {
1102        return BAD_INDEX;
1103    }
1104
1105    if (!select) {
1106        Track* track = NULL;
1107        if (mSubtitleTrack.mSource != NULL && trackIndex == mSubtitleTrack.mIndex) {
1108            track = &mSubtitleTrack;
1109            mFetchSubtitleDataGeneration++;
1110        } else if (mTimedTextTrack.mSource != NULL && trackIndex == mTimedTextTrack.mIndex) {
1111            track = &mTimedTextTrack;
1112            mFetchTimedTextDataGeneration++;
1113        }
1114        if (track == NULL) {
1115            return INVALID_OPERATION;
1116        }
1117        track->mSource->stop();
1118        track->mSource = NULL;
1119        track->mPackets->clear();
1120        return OK;
1121    }
1122
1123    const sp<IMediaSource> source = mSources.itemAt(trackIndex);
1124    sp<MetaData> meta = source->getFormat();
1125    const char *mime;
1126    CHECK(meta->findCString(kKeyMIMEType, &mime));
1127    if (!strncasecmp(mime, "text/", 5)) {
1128        bool isSubtitle = strcasecmp(mime, MEDIA_MIMETYPE_TEXT_3GPP);
1129        Track *track = isSubtitle ? &mSubtitleTrack : &mTimedTextTrack;
1130        if (track->mSource != NULL && track->mIndex == trackIndex) {
1131            return OK;
1132        }
1133        track->mIndex = trackIndex;
1134        if (track->mSource != NULL) {
1135            track->mSource->stop();
1136        }
1137        track->mSource = mSources.itemAt(trackIndex);
1138        track->mSource->start();
1139        if (track->mPackets == NULL) {
1140            track->mPackets = new AnotherPacketSource(track->mSource->getFormat());
1141        } else {
1142            track->mPackets->clear();
1143            track->mPackets->setFormat(track->mSource->getFormat());
1144
1145        }
1146
1147        if (isSubtitle) {
1148            mFetchSubtitleDataGeneration++;
1149        } else {
1150            mFetchTimedTextDataGeneration++;
1151        }
1152
1153        status_t eosResult; // ignored
1154        if (mSubtitleTrack.mSource != NULL
1155                && !mSubtitleTrack.mPackets->hasBufferAvailable(&eosResult)) {
1156            sp<AMessage> msg = new AMessage(kWhatFetchSubtitleData, this);
1157            msg->setInt64("timeUs", timeUs);
1158            msg->setInt32("generation", mFetchSubtitleDataGeneration);
1159            msg->post();
1160        }
1161
1162        sp<AMessage> msg2 = new AMessage(kWhatSendGlobalTimedTextData, this);
1163        msg2->setInt32("generation", mFetchTimedTextDataGeneration);
1164        msg2->post();
1165
1166        if (mTimedTextTrack.mSource != NULL
1167                && !mTimedTextTrack.mPackets->hasBufferAvailable(&eosResult)) {
1168            sp<AMessage> msg = new AMessage(kWhatFetchTimedTextData, this);
1169            msg->setInt64("timeUs", timeUs);
1170            msg->setInt32("generation", mFetchTimedTextDataGeneration);
1171            msg->post();
1172        }
1173
1174        return OK;
1175    } else if (!strncasecmp(mime, "audio/", 6) || !strncasecmp(mime, "video/", 6)) {
1176        bool audio = !strncasecmp(mime, "audio/", 6);
1177        Track *track = audio ? &mAudioTrack : &mVideoTrack;
1178        if (track->mSource != NULL && track->mIndex == trackIndex) {
1179            return OK;
1180        }
1181
1182        sp<AMessage> msg = new AMessage(kWhatChangeAVSource, this);
1183        msg->setInt32("trackIndex", trackIndex);
1184        msg->post();
1185        return OK;
1186    }
1187
1188    return INVALID_OPERATION;
1189}
1190
1191status_t NuPlayer::GenericSource::seekTo(int64_t seekTimeUs, MediaPlayerSeekMode mode) {
1192    sp<AMessage> msg = new AMessage(kWhatSeek, this);
1193    msg->setInt64("seekTimeUs", seekTimeUs);
1194    msg->setInt32("mode", mode);
1195
1196    sp<AMessage> response;
1197    status_t err = msg->postAndAwaitResponse(&response);
1198    if (err == OK && response != NULL) {
1199        CHECK(response->findInt32("err", &err));
1200    }
1201
1202    return err;
1203}
1204
1205void NuPlayer::GenericSource::onSeek(const sp<AMessage>& msg) {
1206    int64_t seekTimeUs;
1207    int32_t mode;
1208    CHECK(msg->findInt64("seekTimeUs", &seekTimeUs));
1209    CHECK(msg->findInt32("mode", &mode));
1210
1211    sp<AMessage> response = new AMessage;
1212    status_t err = doSeek(seekTimeUs, (MediaPlayerSeekMode)mode);
1213    response->setInt32("err", err);
1214
1215    sp<AReplyToken> replyID;
1216    CHECK(msg->senderAwaitsResponse(&replyID));
1217    response->postReply(replyID);
1218}
1219
1220status_t NuPlayer::GenericSource::doSeek(int64_t seekTimeUs, MediaPlayerSeekMode mode) {
1221    mBufferingMonitor->updateDequeuedBufferTime(-1ll);
1222
1223    // If the Widevine source is stopped, do not attempt to read any
1224    // more buffers.
1225    if (mStopRead) {
1226        return INVALID_OPERATION;
1227    }
1228    if (mVideoTrack.mSource != NULL) {
1229        int64_t actualTimeUs;
1230        readBuffer(MEDIA_TRACK_TYPE_VIDEO, seekTimeUs, mode, &actualTimeUs);
1231
1232        if (mode != MediaPlayerSeekMode::SEEK_CLOSEST) {
1233            seekTimeUs = actualTimeUs;
1234        }
1235        mVideoLastDequeueTimeUs = actualTimeUs;
1236    }
1237
1238    if (mAudioTrack.mSource != NULL) {
1239        readBuffer(MEDIA_TRACK_TYPE_AUDIO, seekTimeUs);
1240        mAudioLastDequeueTimeUs = seekTimeUs;
1241    }
1242
1243    setDrmPlaybackStatusIfNeeded(Playback::START, seekTimeUs / 1000);
1244    if (!mStarted) {
1245        setDrmPlaybackStatusIfNeeded(Playback::PAUSE, 0);
1246    }
1247
1248    // If currently buffering, post kWhatBufferingEnd first, so that
1249    // NuPlayer resumes. Otherwise, if cache hits high watermark
1250    // before new polling happens, no one will resume the playback.
1251    mBufferingMonitor->stopBufferingIfNecessary();
1252    mBufferingMonitor->restartPollBuffering();
1253
1254    return OK;
1255}
1256
1257sp<ABuffer> NuPlayer::GenericSource::mediaBufferToABuffer(
1258        MediaBuffer* mb,
1259        media_track_type trackType) {
1260    bool audio = trackType == MEDIA_TRACK_TYPE_AUDIO;
1261    size_t outLength = mb->range_length();
1262
1263    if (audio && mAudioIsVorbis) {
1264        outLength += sizeof(int32_t);
1265    }
1266
1267    sp<ABuffer> ab;
1268    if (mIsSecure && !audio) {
1269        // data is already provided in the buffer
1270        ab = new ABuffer(NULL, mb->range_length());
1271        mb->add_ref();
1272        ab->setMediaBufferBase(mb);
1273    } else {
1274        ab = new ABuffer(outLength);
1275        memcpy(ab->data(),
1276               (const uint8_t *)mb->data() + mb->range_offset(),
1277               mb->range_length());
1278    }
1279
1280    if (audio && mAudioIsVorbis) {
1281        int32_t numPageSamples;
1282        if (!mb->meta_data()->findInt32(kKeyValidSamples, &numPageSamples)) {
1283            numPageSamples = -1;
1284        }
1285
1286        uint8_t* abEnd = ab->data() + mb->range_length();
1287        memcpy(abEnd, &numPageSamples, sizeof(numPageSamples));
1288    }
1289
1290    sp<AMessage> meta = ab->meta();
1291
1292    int64_t timeUs;
1293    CHECK(mb->meta_data()->findInt64(kKeyTime, &timeUs));
1294    meta->setInt64("timeUs", timeUs);
1295
1296    if (trackType == MEDIA_TRACK_TYPE_VIDEO) {
1297        int32_t layerId;
1298        if (mb->meta_data()->findInt32(kKeyTemporalLayerId, &layerId)) {
1299            meta->setInt32("temporal-layer-id", layerId);
1300        }
1301    }
1302
1303    if (trackType == MEDIA_TRACK_TYPE_TIMEDTEXT) {
1304        const char *mime;
1305        CHECK(mTimedTextTrack.mSource != NULL
1306                && mTimedTextTrack.mSource->getFormat()->findCString(kKeyMIMEType, &mime));
1307        meta->setString("mime", mime);
1308    }
1309
1310    int64_t durationUs;
1311    if (mb->meta_data()->findInt64(kKeyDuration, &durationUs)) {
1312        meta->setInt64("durationUs", durationUs);
1313    }
1314
1315    if (trackType == MEDIA_TRACK_TYPE_SUBTITLE) {
1316        meta->setInt32("trackIndex", mSubtitleTrack.mIndex);
1317    }
1318
1319    uint32_t dataType; // unused
1320    const void *seiData;
1321    size_t seiLength;
1322    if (mb->meta_data()->findData(kKeySEI, &dataType, &seiData, &seiLength)) {
1323        sp<ABuffer> sei = ABuffer::CreateAsCopy(seiData, seiLength);;
1324        meta->setBuffer("sei", sei);
1325    }
1326
1327    const void *mpegUserDataPointer;
1328    size_t mpegUserDataLength;
1329    if (mb->meta_data()->findData(
1330            kKeyMpegUserData, &dataType, &mpegUserDataPointer, &mpegUserDataLength)) {
1331        sp<ABuffer> mpegUserData = ABuffer::CreateAsCopy(mpegUserDataPointer, mpegUserDataLength);
1332        meta->setBuffer("mpegUserData", mpegUserData);
1333    }
1334
1335    mb->release();
1336    mb = NULL;
1337
1338    return ab;
1339}
1340
1341void NuPlayer::GenericSource::postReadBuffer(media_track_type trackType) {
1342    Mutex::Autolock _l(mReadBufferLock);
1343
1344    if ((mPendingReadBufferTypes & (1 << trackType)) == 0) {
1345        mPendingReadBufferTypes |= (1 << trackType);
1346        sp<AMessage> msg = new AMessage(kWhatReadBuffer, this);
1347        msg->setInt32("trackType", trackType);
1348        msg->post();
1349    }
1350}
1351
1352void NuPlayer::GenericSource::onReadBuffer(const sp<AMessage>& msg) {
1353    int32_t tmpType;
1354    CHECK(msg->findInt32("trackType", &tmpType));
1355    media_track_type trackType = (media_track_type)tmpType;
1356    readBuffer(trackType);
1357    {
1358        // only protect the variable change, as readBuffer may
1359        // take considerable time.
1360        Mutex::Autolock _l(mReadBufferLock);
1361        mPendingReadBufferTypes &= ~(1 << trackType);
1362    }
1363}
1364
1365void NuPlayer::GenericSource::readBuffer(
1366        media_track_type trackType, int64_t seekTimeUs, MediaPlayerSeekMode mode,
1367        int64_t *actualTimeUs, bool formatChange) {
1368    // Do not read data if Widevine source is stopped
1369    if (mStopRead) {
1370        return;
1371    }
1372    Track *track;
1373    size_t maxBuffers = 1;
1374    switch (trackType) {
1375        case MEDIA_TRACK_TYPE_VIDEO:
1376            track = &mVideoTrack;
1377            if (mIsWidevine) {
1378                maxBuffers = 2;
1379            } else {
1380                maxBuffers = 8;  // too large of a number may influence seeks
1381            }
1382            break;
1383        case MEDIA_TRACK_TYPE_AUDIO:
1384            track = &mAudioTrack;
1385            if (mIsWidevine) {
1386                maxBuffers = 8;
1387            } else {
1388                maxBuffers = 64;
1389            }
1390            break;
1391        case MEDIA_TRACK_TYPE_SUBTITLE:
1392            track = &mSubtitleTrack;
1393            break;
1394        case MEDIA_TRACK_TYPE_TIMEDTEXT:
1395            track = &mTimedTextTrack;
1396            break;
1397        default:
1398            TRESPASS();
1399    }
1400
1401    if (track->mSource == NULL) {
1402        return;
1403    }
1404
1405    if (actualTimeUs) {
1406        *actualTimeUs = seekTimeUs;
1407    }
1408
1409    MediaSource::ReadOptions options;
1410
1411    bool seeking = false;
1412    if (seekTimeUs >= 0) {
1413        options.setSeekTo(seekTimeUs, mode);
1414        seeking = true;
1415    }
1416
1417    const bool couldReadMultiple = (!mIsWidevine && track->mSource->supportReadMultiple());
1418
1419    if (mIsWidevine || couldReadMultiple) {
1420        options.setNonBlocking();
1421    }
1422
1423    for (size_t numBuffers = 0; numBuffers < maxBuffers; ) {
1424        Vector<MediaBuffer *> mediaBuffers;
1425        status_t err = NO_ERROR;
1426
1427        if (couldReadMultiple) {
1428            err = track->mSource->readMultiple(
1429                    &mediaBuffers, maxBuffers - numBuffers, &options);
1430        } else {
1431            MediaBuffer *mbuf = NULL;
1432            err = track->mSource->read(&mbuf, &options);
1433            if (err == OK && mbuf != NULL) {
1434                mediaBuffers.push_back(mbuf);
1435            }
1436        }
1437
1438        options.clearNonPersistent();
1439
1440        size_t id = 0;
1441        size_t count = mediaBuffers.size();
1442        for (; id < count; ++id) {
1443            int64_t timeUs;
1444            MediaBuffer *mbuf = mediaBuffers[id];
1445            if (!mbuf->meta_data()->findInt64(kKeyTime, &timeUs)) {
1446                mbuf->meta_data()->dumpToLog();
1447                track->mPackets->signalEOS(ERROR_MALFORMED);
1448                break;
1449            }
1450            if (trackType == MEDIA_TRACK_TYPE_AUDIO) {
1451                mAudioTimeUs = timeUs;
1452                mBufferingMonitor->updateQueuedTime(true /* isAudio */, timeUs);
1453            } else if (trackType == MEDIA_TRACK_TYPE_VIDEO) {
1454                mVideoTimeUs = timeUs;
1455                mBufferingMonitor->updateQueuedTime(false /* isAudio */, timeUs);
1456            }
1457
1458            queueDiscontinuityIfNeeded(seeking, formatChange, trackType, track);
1459
1460            sp<ABuffer> buffer = mediaBufferToABuffer(mbuf, trackType);
1461            if (numBuffers == 0 && actualTimeUs != nullptr) {
1462                *actualTimeUs = timeUs;
1463            }
1464            if (seeking && buffer != nullptr) {
1465                sp<AMessage> meta = buffer->meta();
1466                if (meta != nullptr && mode == MediaPlayerSeekMode::SEEK_CLOSEST
1467                        && seekTimeUs > timeUs) {
1468                    sp<AMessage> extra = new AMessage;
1469                    extra->setInt64("resume-at-mediaTimeUs", seekTimeUs);
1470                    meta->setMessage("extra", extra);
1471                }
1472            }
1473
1474            track->mPackets->queueAccessUnit(buffer);
1475            formatChange = false;
1476            seeking = false;
1477            ++numBuffers;
1478        }
1479        if (id < count) {
1480            // Error, some mediaBuffer doesn't have kKeyTime.
1481            for (; id < count; ++id) {
1482                mediaBuffers[id]->release();
1483            }
1484            break;
1485        }
1486
1487        if (err == WOULD_BLOCK) {
1488            break;
1489        } else if (err == INFO_FORMAT_CHANGED) {
1490#if 0
1491            track->mPackets->queueDiscontinuity(
1492                    ATSParser::DISCONTINUITY_FORMATCHANGE,
1493                    NULL,
1494                    false /* discard */);
1495#endif
1496        } else if (err != OK) {
1497            queueDiscontinuityIfNeeded(seeking, formatChange, trackType, track);
1498            track->mPackets->signalEOS(err);
1499            break;
1500        }
1501    }
1502}
1503
1504void NuPlayer::GenericSource::queueDiscontinuityIfNeeded(
1505        bool seeking, bool formatChange, media_track_type trackType, Track *track) {
1506    // formatChange && seeking: track whose source is changed during selection
1507    // formatChange && !seeking: track whose source is not changed during selection
1508    // !formatChange: normal seek
1509    if ((seeking || formatChange)
1510            && (trackType == MEDIA_TRACK_TYPE_AUDIO
1511            || trackType == MEDIA_TRACK_TYPE_VIDEO)) {
1512        ATSParser::DiscontinuityType type = (formatChange && seeking)
1513                ? ATSParser::DISCONTINUITY_FORMATCHANGE
1514                : ATSParser::DISCONTINUITY_NONE;
1515        track->mPackets->queueDiscontinuity(type, NULL /* extra */, true /* discard */);
1516    }
1517}
1518
1519NuPlayer::GenericSource::BufferingMonitor::BufferingMonitor(const sp<AMessage> &notify)
1520    : mNotify(notify),
1521      mDurationUs(-1ll),
1522      mBitrate(-1ll),
1523      mIsStreaming(false),
1524      mAudioTimeUs(0),
1525      mVideoTimeUs(0),
1526      mPollBufferingGeneration(0),
1527      mPrepareBuffering(false),
1528      mBuffering(false),
1529      mPrevBufferPercentage(-1),
1530      mOffloadAudio(false),
1531      mFirstDequeuedBufferRealUs(-1ll),
1532      mFirstDequeuedBufferMediaUs(-1ll),
1533      mlastDequeuedBufferMediaUs(-1ll) {
1534}
1535
1536NuPlayer::GenericSource::BufferingMonitor::~BufferingMonitor() {
1537}
1538
1539void NuPlayer::GenericSource::BufferingMonitor::prepare(
1540        const sp<NuCachedSource2> &cachedSource,
1541        const sp<WVMExtractor> &wvmExtractor,
1542        int64_t durationUs,
1543        int64_t bitrate,
1544        bool isStreaming) {
1545    Mutex::Autolock _l(mLock);
1546    prepare_l(cachedSource, wvmExtractor, durationUs, bitrate, isStreaming);
1547}
1548
1549void NuPlayer::GenericSource::BufferingMonitor::stop() {
1550    Mutex::Autolock _l(mLock);
1551    prepare_l(NULL /* cachedSource */, NULL /* wvmExtractor */, -1 /* durationUs */,
1552            -1 /* bitrate */, false /* isStreaming */);
1553}
1554
1555void NuPlayer::GenericSource::BufferingMonitor::cancelPollBuffering() {
1556    Mutex::Autolock _l(mLock);
1557    cancelPollBuffering_l();
1558}
1559
1560void NuPlayer::GenericSource::BufferingMonitor::restartPollBuffering() {
1561    Mutex::Autolock _l(mLock);
1562    if (mIsStreaming) {
1563        cancelPollBuffering_l();
1564        onPollBuffering_l();
1565    }
1566}
1567
1568void NuPlayer::GenericSource::BufferingMonitor::stopBufferingIfNecessary() {
1569    Mutex::Autolock _l(mLock);
1570    stopBufferingIfNecessary_l();
1571}
1572
1573void NuPlayer::GenericSource::BufferingMonitor::ensureCacheIsFetching() {
1574    Mutex::Autolock _l(mLock);
1575    ensureCacheIsFetching_l();
1576}
1577
1578void NuPlayer::GenericSource::BufferingMonitor::updateQueuedTime(bool isAudio, int64_t timeUs) {
1579    Mutex::Autolock _l(mLock);
1580    if (isAudio) {
1581        mAudioTimeUs = timeUs;
1582    } else {
1583        mVideoTimeUs = timeUs;
1584    }
1585}
1586
1587void NuPlayer::GenericSource::BufferingMonitor::setOffloadAudio(bool offload) {
1588    Mutex::Autolock _l(mLock);
1589    mOffloadAudio = offload;
1590}
1591
1592void NuPlayer::GenericSource::BufferingMonitor::updateDequeuedBufferTime(int64_t mediaUs) {
1593    Mutex::Autolock _l(mLock);
1594    if (mediaUs < 0) {
1595        mFirstDequeuedBufferRealUs = -1ll;
1596        mFirstDequeuedBufferMediaUs = -1ll;
1597    } else if (mFirstDequeuedBufferRealUs < 0) {
1598        mFirstDequeuedBufferRealUs = ALooper::GetNowUs();
1599        mFirstDequeuedBufferMediaUs = mediaUs;
1600    }
1601    mlastDequeuedBufferMediaUs = mediaUs;
1602}
1603
1604void NuPlayer::GenericSource::BufferingMonitor::prepare_l(
1605        const sp<NuCachedSource2> &cachedSource,
1606        const sp<WVMExtractor> &wvmExtractor,
1607        int64_t durationUs,
1608        int64_t bitrate,
1609        bool isStreaming) {
1610    ALOGW_IF(wvmExtractor != NULL && cachedSource != NULL,
1611            "WVMExtractor and NuCachedSource are both present when "
1612            "BufferingMonitor::prepare_l is called, ignore NuCachedSource");
1613
1614    mCachedSource = cachedSource;
1615    mWVMExtractor = wvmExtractor;
1616    mDurationUs = durationUs;
1617    mBitrate = bitrate;
1618    mIsStreaming = isStreaming;
1619    mAudioTimeUs = 0;
1620    mVideoTimeUs = 0;
1621    mPrepareBuffering = (cachedSource != NULL || wvmExtractor != NULL);
1622    cancelPollBuffering_l();
1623    mOffloadAudio = false;
1624    mFirstDequeuedBufferRealUs = -1ll;
1625    mFirstDequeuedBufferMediaUs = -1ll;
1626    mlastDequeuedBufferMediaUs = -1ll;
1627}
1628
1629void NuPlayer::GenericSource::BufferingMonitor::cancelPollBuffering_l() {
1630    mBuffering = false;
1631    ++mPollBufferingGeneration;
1632    mPrevBufferPercentage = -1;
1633}
1634
1635void NuPlayer::GenericSource::BufferingMonitor::notifyBufferingUpdate_l(int32_t percentage) {
1636    // Buffering percent could go backward as it's estimated from remaining
1637    // data and last access time. This could cause the buffering position
1638    // drawn on media control to jitter slightly. Remember previously reported
1639    // percentage and don't allow it to go backward.
1640    if (percentage < mPrevBufferPercentage) {
1641        percentage = mPrevBufferPercentage;
1642    } else if (percentage > 100) {
1643        percentage = 100;
1644    }
1645
1646    mPrevBufferPercentage = percentage;
1647
1648    ALOGV("notifyBufferingUpdate_l: buffering %d%%", percentage);
1649
1650    sp<AMessage> msg = mNotify->dup();
1651    msg->setInt32("what", kWhatBufferingUpdate);
1652    msg->setInt32("percentage", percentage);
1653    msg->post();
1654}
1655
1656void NuPlayer::GenericSource::BufferingMonitor::startBufferingIfNecessary_l() {
1657    if (mPrepareBuffering) {
1658        return;
1659    }
1660
1661    if (!mBuffering) {
1662        ALOGD("startBufferingIfNecessary_l");
1663
1664        mBuffering = true;
1665
1666        ensureCacheIsFetching_l();
1667        sendCacheStats_l();
1668
1669        sp<AMessage> notify = mNotify->dup();
1670        notify->setInt32("what", kWhatPauseOnBufferingStart);
1671        notify->post();
1672    }
1673}
1674
1675void NuPlayer::GenericSource::BufferingMonitor::stopBufferingIfNecessary_l() {
1676    if (mPrepareBuffering) {
1677        ALOGD("stopBufferingIfNecessary_l, mBuffering=%d", mBuffering);
1678
1679        mPrepareBuffering = false;
1680
1681        sp<AMessage> notify = mNotify->dup();
1682        notify->setInt32("what", kWhatPrepared);
1683        notify->setInt32("err", OK);
1684        notify->post();
1685
1686        return;
1687    }
1688
1689    if (mBuffering) {
1690        ALOGD("stopBufferingIfNecessary_l");
1691        mBuffering = false;
1692
1693        sendCacheStats_l();
1694
1695        sp<AMessage> notify = mNotify->dup();
1696        notify->setInt32("what", kWhatResumeOnBufferingEnd);
1697        notify->post();
1698    }
1699}
1700
1701void NuPlayer::GenericSource::BufferingMonitor::sendCacheStats_l() {
1702    int32_t kbps = 0;
1703    status_t err = UNKNOWN_ERROR;
1704
1705    if (mWVMExtractor != NULL) {
1706        err = mWVMExtractor->getEstimatedBandwidthKbps(&kbps);
1707    } else if (mCachedSource != NULL) {
1708        err = mCachedSource->getEstimatedBandwidthKbps(&kbps);
1709    }
1710
1711    if (err == OK) {
1712        sp<AMessage> notify = mNotify->dup();
1713        notify->setInt32("what", kWhatCacheStats);
1714        notify->setInt32("bandwidth", kbps);
1715        notify->post();
1716    }
1717}
1718
1719void NuPlayer::GenericSource::BufferingMonitor::ensureCacheIsFetching_l() {
1720    if (mCachedSource != NULL) {
1721        mCachedSource->resumeFetchingIfNecessary();
1722    }
1723}
1724
1725void NuPlayer::GenericSource::BufferingMonitor::schedulePollBuffering_l() {
1726    sp<AMessage> msg = new AMessage(kWhatPollBuffering, this);
1727    msg->setInt32("generation", mPollBufferingGeneration);
1728    // Enquires buffering status every second.
1729    msg->post(1000000ll);
1730}
1731
1732int64_t NuPlayer::GenericSource::BufferingMonitor::getLastReadPosition_l() {
1733    if (mAudioTimeUs > 0) {
1734        return mAudioTimeUs;
1735    } else if (mVideoTimeUs > 0) {
1736        return mVideoTimeUs;
1737    } else {
1738        return 0;
1739    }
1740}
1741
1742void NuPlayer::GenericSource::BufferingMonitor::onPollBuffering_l() {
1743    status_t finalStatus = UNKNOWN_ERROR;
1744    int64_t cachedDurationUs = -1ll;
1745    ssize_t cachedDataRemaining = -1;
1746
1747    if (mWVMExtractor != NULL) {
1748        cachedDurationUs =
1749                mWVMExtractor->getCachedDurationUs(&finalStatus);
1750    } else if (mCachedSource != NULL) {
1751        cachedDataRemaining =
1752                mCachedSource->approxDataRemaining(&finalStatus);
1753
1754        if (finalStatus == OK) {
1755            off64_t size;
1756            int64_t bitrate = 0ll;
1757            if (mDurationUs > 0 && mCachedSource->getSize(&size) == OK) {
1758                // |bitrate| uses bits/second unit, while size is number of bytes.
1759                bitrate = size * 8000000ll / mDurationUs;
1760            } else if (mBitrate > 0) {
1761                bitrate = mBitrate;
1762            }
1763            if (bitrate > 0) {
1764                cachedDurationUs = cachedDataRemaining * 8000000ll / bitrate;
1765            }
1766        }
1767    }
1768
1769    if (finalStatus != OK) {
1770        ALOGV("onPollBuffering_l: EOS (finalStatus = %d)", finalStatus);
1771
1772        if (finalStatus == ERROR_END_OF_STREAM) {
1773            notifyBufferingUpdate_l(100);
1774        }
1775
1776        stopBufferingIfNecessary_l();
1777        return;
1778    } else if (cachedDurationUs >= 0ll) {
1779        if (mDurationUs > 0ll) {
1780            int64_t cachedPosUs = getLastReadPosition_l() + cachedDurationUs;
1781            int percentage = 100.0 * cachedPosUs / mDurationUs;
1782            if (percentage > 100) {
1783                percentage = 100;
1784            }
1785
1786            notifyBufferingUpdate_l(percentage);
1787        }
1788
1789        ALOGV("onPollBuffering_l: cachedDurationUs %.1f sec",
1790                cachedDurationUs / 1000000.0f);
1791
1792        if (cachedDurationUs < kLowWaterMarkUs) {
1793            // Take into account the data cached in downstream components to try to avoid
1794            // unnecessary pause.
1795            if (mOffloadAudio && mFirstDequeuedBufferRealUs >= 0) {
1796                int64_t downStreamCacheUs = mlastDequeuedBufferMediaUs - mFirstDequeuedBufferMediaUs
1797                        - (ALooper::GetNowUs() - mFirstDequeuedBufferRealUs);
1798                if (downStreamCacheUs > 0) {
1799                    cachedDurationUs += downStreamCacheUs;
1800                }
1801            }
1802
1803            if (cachedDurationUs < kLowWaterMarkUs) {
1804                startBufferingIfNecessary_l();
1805            }
1806        } else {
1807            int64_t highWaterMark = mPrepareBuffering ? kHighWaterMarkUs : kHighWaterMarkRebufferUs;
1808            if (cachedDurationUs > highWaterMark) {
1809                stopBufferingIfNecessary_l();
1810            }
1811        }
1812    } else if (cachedDataRemaining >= 0) {
1813        ALOGV("onPollBuffering_l: cachedDataRemaining %zd bytes",
1814                cachedDataRemaining);
1815
1816        if (cachedDataRemaining < kLowWaterMarkBytes) {
1817            startBufferingIfNecessary_l();
1818        } else if (cachedDataRemaining > kHighWaterMarkBytes) {
1819            stopBufferingIfNecessary_l();
1820        }
1821    }
1822
1823    schedulePollBuffering_l();
1824}
1825
1826void NuPlayer::GenericSource::BufferingMonitor::onMessageReceived(const sp<AMessage> &msg) {
1827    switch (msg->what()) {
1828      case kWhatPollBuffering:
1829      {
1830          int32_t generation;
1831          CHECK(msg->findInt32("generation", &generation));
1832          Mutex::Autolock _l(mLock);
1833          if (generation == mPollBufferingGeneration) {
1834              onPollBuffering_l();
1835          }
1836          break;
1837      }
1838      default:
1839          TRESPASS();
1840          break;
1841    }
1842}
1843
1844}  // namespace android
1845