GenericSource.cpp revision f8bd851cc652501239a8e3759b21890dfa2afdea 
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 const ssize_t kLowWaterMarkBytes = 40000;
46static const ssize_t kHighWaterMarkBytes = 200000;
47
48NuPlayer::GenericSource::GenericSource(
49        const sp<AMessage> &notify,
50        bool uidValid,
51        uid_t uid)
52    : Source(notify),
53      mAudioTimeUs(0),
54      mAudioLastDequeueTimeUs(0),
55      mVideoTimeUs(0),
56      mVideoLastDequeueTimeUs(0),
57      mFetchSubtitleDataGeneration(0),
58      mFetchTimedTextDataGeneration(0),
59      mDurationUs(0ll),
60      mAudioIsVorbis(false),
61      mIsWidevine(false),
62      mIsSecure(false),
63      mIsStreaming(false),
64      mUIDValid(uidValid),
65      mUID(uid),
66      mFd(-1),
67      mDrmManagerClient(NULL),
68      mBitrate(-1ll),
69      mPollBufferingGeneration(0),
70      mPendingReadBufferTypes(0),
71      mBuffering(false),
72      mPrepareBuffering(false),
73      mPrevBufferPercentage(-1) {
74    resetDataSource();
75    DataSource::RegisterDefaultSniffers();
76}
77
78void NuPlayer::GenericSource::resetDataSource() {
79    mHTTPService.clear();
80    mHttpSource.clear();
81    mUri.clear();
82    mUriHeaders.clear();
83    if (mFd >= 0) {
84        close(mFd);
85        mFd = -1;
86    }
87    mOffset = 0;
88    mLength = 0;
89    setDrmPlaybackStatusIfNeeded(Playback::STOP, 0);
90    mDecryptHandle = NULL;
91    mDrmManagerClient = NULL;
92    mStarted = false;
93    mStopRead = true;
94}
95
96status_t NuPlayer::GenericSource::setDataSource(
97        const sp<IMediaHTTPService> &httpService,
98        const char *url,
99        const KeyedVector<String8, String8> *headers) {
100    resetDataSource();
101
102    mHTTPService = httpService;
103    mUri = url;
104
105    if (headers) {
106        mUriHeaders = *headers;
107    }
108
109    // delay data source creation to prepareAsync() to avoid blocking
110    // the calling thread in setDataSource for any significant time.
111    return OK;
112}
113
114status_t NuPlayer::GenericSource::setDataSource(
115        int fd, int64_t offset, int64_t length) {
116    resetDataSource();
117
118    mFd = dup(fd);
119    mOffset = offset;
120    mLength = length;
121
122    // delay data source creation to prepareAsync() to avoid blocking
123    // the calling thread in setDataSource for any significant time.
124    return OK;
125}
126
127status_t NuPlayer::GenericSource::setDataSource(const sp<DataSource>& source) {
128    resetDataSource();
129    mDataSource = source;
130    return OK;
131}
132
133sp<MetaData> NuPlayer::GenericSource::getFileFormatMeta() const {
134    return mFileMeta;
135}
136
137status_t NuPlayer::GenericSource::initFromDataSource() {
138    sp<MediaExtractor> extractor;
139    String8 mimeType;
140    float confidence;
141    sp<AMessage> dummy;
142    bool isWidevineStreaming = false;
143
144    CHECK(mDataSource != NULL);
145
146    if (mIsWidevine) {
147        isWidevineStreaming = SniffWVM(
148                mDataSource, &mimeType, &confidence, &dummy);
149        if (!isWidevineStreaming ||
150                strcasecmp(
151                    mimeType.string(), MEDIA_MIMETYPE_CONTAINER_WVM)) {
152            ALOGE("unsupported widevine mime: %s", mimeType.string());
153            return UNKNOWN_ERROR;
154        }
155    } else if (mIsStreaming) {
156        if (!mDataSource->sniff(&mimeType, &confidence, &dummy)) {
157            return UNKNOWN_ERROR;
158        }
159        isWidevineStreaming = !strcasecmp(
160                mimeType.string(), MEDIA_MIMETYPE_CONTAINER_WVM);
161    }
162
163    if (isWidevineStreaming) {
164        // we don't want cached source for widevine streaming.
165        mCachedSource.clear();
166        mDataSource = mHttpSource;
167        mWVMExtractor = new WVMExtractor(mDataSource);
168        mWVMExtractor->setAdaptiveStreamingMode(true);
169        if (mUIDValid) {
170            mWVMExtractor->setUID(mUID);
171        }
172        extractor = mWVMExtractor;
173    } else {
174        extractor = MediaExtractor::Create(mDataSource,
175                mimeType.isEmpty() ? NULL : mimeType.string());
176    }
177
178    if (extractor == NULL) {
179        return UNKNOWN_ERROR;
180    }
181
182    if (extractor->getDrmFlag()) {
183        checkDrmStatus(mDataSource);
184    }
185
186    mFileMeta = extractor->getMetaData();
187    if (mFileMeta != NULL) {
188        int64_t duration;
189        if (mFileMeta->findInt64(kKeyDuration, &duration)) {
190            mDurationUs = duration;
191        }
192
193        if (!mIsWidevine) {
194            // Check mime to see if we actually have a widevine source.
195            // If the data source is not URL-type (eg. file source), we
196            // won't be able to tell until now.
197            const char *fileMime;
198            if (mFileMeta->findCString(kKeyMIMEType, &fileMime)
199                    && !strncasecmp(fileMime, "video/wvm", 9)) {
200                mIsWidevine = true;
201            }
202        }
203    }
204
205    int32_t totalBitrate = 0;
206
207    size_t numtracks = extractor->countTracks();
208    if (numtracks == 0) {
209        return UNKNOWN_ERROR;
210    }
211
212    for (size_t i = 0; i < numtracks; ++i) {
213        sp<MediaSource> track = extractor->getTrack(i);
214
215        sp<MetaData> meta = extractor->getTrackMetaData(i);
216
217        const char *mime;
218        CHECK(meta->findCString(kKeyMIMEType, &mime));
219
220        // Do the string compare immediately with "mime",
221        // we can't assume "mime" would stay valid after another
222        // extractor operation, some extractors might modify meta
223        // during getTrack() and make it invalid.
224        if (!strncasecmp(mime, "audio/", 6)) {
225            if (mAudioTrack.mSource == NULL) {
226                mAudioTrack.mIndex = i;
227                mAudioTrack.mSource = track;
228                mAudioTrack.mPackets =
229                    new AnotherPacketSource(mAudioTrack.mSource->getFormat());
230
231                if (!strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_VORBIS)) {
232                    mAudioIsVorbis = true;
233                } else {
234                    mAudioIsVorbis = false;
235                }
236            }
237        } else if (!strncasecmp(mime, "video/", 6)) {
238            if (mVideoTrack.mSource == NULL) {
239                mVideoTrack.mIndex = i;
240                mVideoTrack.mSource = track;
241                mVideoTrack.mPackets =
242                    new AnotherPacketSource(mVideoTrack.mSource->getFormat());
243
244                // check if the source requires secure buffers
245                int32_t secure;
246                if (meta->findInt32(kKeyRequiresSecureBuffers, &secure)
247                        && secure) {
248                    mIsSecure = true;
249                    if (mUIDValid) {
250                        extractor->setUID(mUID);
251                    }
252                }
253            }
254        }
255
256        if (track != NULL) {
257            mSources.push(track);
258            int64_t durationUs;
259            if (meta->findInt64(kKeyDuration, &durationUs)) {
260                if (durationUs > mDurationUs) {
261                    mDurationUs = durationUs;
262                }
263            }
264
265            int32_t bitrate;
266            if (totalBitrate >= 0 && meta->findInt32(kKeyBitRate, &bitrate)) {
267                totalBitrate += bitrate;
268            } else {
269                totalBitrate = -1;
270            }
271        }
272    }
273
274    mBitrate = totalBitrate;
275
276    return OK;
277}
278
279status_t NuPlayer::GenericSource::startSources() {
280    // Start the selected A/V tracks now before we start buffering.
281    // Widevine sources might re-initialize crypto when starting, if we delay
282    // this to start(), all data buffered during prepare would be wasted.
283    // (We don't actually start reading until start().)
284    if (mAudioTrack.mSource != NULL && mAudioTrack.mSource->start() != OK) {
285        ALOGE("failed to start audio track!");
286        return UNKNOWN_ERROR;
287    }
288
289    if (mVideoTrack.mSource != NULL && mVideoTrack.mSource->start() != OK) {
290        ALOGE("failed to start video track!");
291        return UNKNOWN_ERROR;
292    }
293
294    return OK;
295}
296
297void NuPlayer::GenericSource::checkDrmStatus(const sp<DataSource>& dataSource) {
298    dataSource->getDrmInfo(mDecryptHandle, &mDrmManagerClient);
299    if (mDecryptHandle != NULL) {
300        CHECK(mDrmManagerClient);
301        if (RightsStatus::RIGHTS_VALID != mDecryptHandle->status) {
302            sp<AMessage> msg = dupNotify();
303            msg->setInt32("what", kWhatDrmNoLicense);
304            msg->post();
305        }
306    }
307}
308
309int64_t NuPlayer::GenericSource::getLastReadPosition() {
310    if (mAudioTrack.mSource != NULL) {
311        return mAudioTimeUs;
312    } else if (mVideoTrack.mSource != NULL) {
313        return mVideoTimeUs;
314    } else {
315        return 0;
316    }
317}
318
319status_t NuPlayer::GenericSource::setBuffers(
320        bool audio, Vector<MediaBuffer *> &buffers) {
321    if (mIsSecure && !audio) {
322        return mVideoTrack.mSource->setBuffers(buffers);
323    }
324    return INVALID_OPERATION;
325}
326
327NuPlayer::GenericSource::~GenericSource() {
328    if (mLooper != NULL) {
329        mLooper->unregisterHandler(id());
330        mLooper->stop();
331    }
332    resetDataSource();
333}
334
335void NuPlayer::GenericSource::prepareAsync() {
336    if (mLooper == NULL) {
337        mLooper = new ALooper;
338        mLooper->setName("generic");
339        mLooper->start();
340
341        mLooper->registerHandler(this);
342    }
343
344    sp<AMessage> msg = new AMessage(kWhatPrepareAsync, this);
345    msg->post();
346}
347
348void NuPlayer::GenericSource::onPrepareAsync() {
349    // delayed data source creation
350    if (mDataSource == NULL) {
351        // set to false first, if the extractor
352        // comes back as secure, set it to true then.
353        mIsSecure = false;
354
355        if (!mUri.empty()) {
356            const char* uri = mUri.c_str();
357            String8 contentType;
358            mIsWidevine = !strncasecmp(uri, "widevine://", 11);
359
360            if (!strncasecmp("http://", uri, 7)
361                    || !strncasecmp("https://", uri, 8)
362                    || mIsWidevine) {
363                mHttpSource = DataSource::CreateMediaHTTP(mHTTPService);
364                if (mHttpSource == NULL) {
365                    ALOGE("Failed to create http source!");
366                    notifyPreparedAndCleanup(UNKNOWN_ERROR);
367                    return;
368                }
369            }
370
371            mDataSource = DataSource::CreateFromURI(
372                   mHTTPService, uri, &mUriHeaders, &contentType,
373                   static_cast<HTTPBase *>(mHttpSource.get()));
374        } else {
375            mIsWidevine = false;
376
377            mDataSource = new FileSource(mFd, mOffset, mLength);
378            mFd = -1;
379        }
380
381        if (mDataSource == NULL) {
382            ALOGE("Failed to create data source!");
383            notifyPreparedAndCleanup(UNKNOWN_ERROR);
384            return;
385        }
386    }
387
388    if (mDataSource->flags() & DataSource::kIsCachingDataSource) {
389        mCachedSource = static_cast<NuCachedSource2 *>(mDataSource.get());
390    }
391
392    // For widevine or other cached streaming cases, we need to wait for
393    // enough buffering before reporting prepared.
394    // Note that even when URL doesn't start with widevine://, mIsWidevine
395    // could still be set to true later, if the streaming or file source
396    // is sniffed to be widevine. We don't want to buffer for file source
397    // in that case, so must check the flag now.
398    mIsStreaming = (mIsWidevine || mCachedSource != NULL);
399
400    // init extractor from data source
401    status_t err = initFromDataSource();
402
403    if (err != OK) {
404        ALOGE("Failed to init from data source!");
405        notifyPreparedAndCleanup(err);
406        return;
407    }
408
409    if (mVideoTrack.mSource != NULL) {
410        sp<MetaData> meta = doGetFormatMeta(false /* audio */);
411        sp<AMessage> msg = new AMessage;
412        err = convertMetaDataToMessage(meta, &msg);
413        if(err != OK) {
414            notifyPreparedAndCleanup(err);
415            return;
416        }
417        notifyVideoSizeChanged(msg);
418    }
419
420    notifyFlagsChanged(
421            (mIsSecure ? FLAG_SECURE : 0)
422            | (mDecryptHandle != NULL ? FLAG_PROTECTED : 0)
423            | FLAG_CAN_PAUSE
424            | FLAG_CAN_SEEK_BACKWARD
425            | FLAG_CAN_SEEK_FORWARD
426            | FLAG_CAN_SEEK);
427
428    if (mIsSecure) {
429        // secure decoders must be instantiated before starting widevine source
430        sp<AMessage> reply = new AMessage(kWhatSecureDecodersInstantiated, this);
431        notifyInstantiateSecureDecoders(reply);
432    } else {
433        finishPrepareAsync();
434    }
435}
436
437void NuPlayer::GenericSource::onSecureDecodersInstantiated(status_t err) {
438    if (err != OK) {
439        ALOGE("Failed to instantiate secure decoders!");
440        notifyPreparedAndCleanup(err);
441        return;
442    }
443    finishPrepareAsync();
444}
445
446void NuPlayer::GenericSource::finishPrepareAsync() {
447    status_t err = startSources();
448    if (err != OK) {
449        ALOGE("Failed to init start data source!");
450        notifyPreparedAndCleanup(err);
451        return;
452    }
453
454    if (mIsStreaming) {
455        mPrepareBuffering = true;
456
457        ensureCacheIsFetching();
458        restartPollBuffering();
459    } else {
460        notifyPrepared();
461    }
462}
463
464void NuPlayer::GenericSource::notifyPreparedAndCleanup(status_t err) {
465    if (err != OK) {
466        mDataSource.clear();
467        mCachedSource.clear();
468        mHttpSource.clear();
469        mBitrate = -1;
470
471        cancelPollBuffering();
472    }
473    notifyPrepared(err);
474}
475
476void NuPlayer::GenericSource::start() {
477    ALOGI("start");
478
479    mStopRead = false;
480    if (mAudioTrack.mSource != NULL) {
481        postReadBuffer(MEDIA_TRACK_TYPE_AUDIO);
482    }
483
484    if (mVideoTrack.mSource != NULL) {
485        postReadBuffer(MEDIA_TRACK_TYPE_VIDEO);
486    }
487
488    setDrmPlaybackStatusIfNeeded(Playback::START, getLastReadPosition() / 1000);
489    mStarted = true;
490
491    (new AMessage(kWhatStart, this))->post();
492}
493
494void NuPlayer::GenericSource::stop() {
495    // nothing to do, just account for DRM playback status
496    setDrmPlaybackStatusIfNeeded(Playback::STOP, 0);
497    mStarted = false;
498    if (mIsWidevine || mIsSecure) {
499        // For widevine or secure sources we need to prevent any further reads.
500        sp<AMessage> msg = new AMessage(kWhatStopWidevine, this);
501        sp<AMessage> response;
502        (void) msg->postAndAwaitResponse(&response);
503    }
504}
505
506void NuPlayer::GenericSource::pause() {
507    // nothing to do, just account for DRM playback status
508    setDrmPlaybackStatusIfNeeded(Playback::PAUSE, 0);
509    mStarted = false;
510}
511
512void NuPlayer::GenericSource::resume() {
513    // nothing to do, just account for DRM playback status
514    setDrmPlaybackStatusIfNeeded(Playback::START, getLastReadPosition() / 1000);
515    mStarted = true;
516
517    (new AMessage(kWhatResume, this))->post();
518}
519
520void NuPlayer::GenericSource::disconnect() {
521    if (mDataSource != NULL) {
522        // disconnect data source
523        if (mDataSource->flags() & DataSource::kIsCachingDataSource) {
524            static_cast<NuCachedSource2 *>(mDataSource.get())->disconnect();
525        }
526    } else if (mHttpSource != NULL) {
527        static_cast<HTTPBase *>(mHttpSource.get())->disconnect();
528    }
529}
530
531void NuPlayer::GenericSource::setDrmPlaybackStatusIfNeeded(int playbackStatus, int64_t position) {
532    if (mDecryptHandle != NULL) {
533        mDrmManagerClient->setPlaybackStatus(mDecryptHandle, playbackStatus, position);
534    }
535    mSubtitleTrack.mPackets = new AnotherPacketSource(NULL);
536    mTimedTextTrack.mPackets = new AnotherPacketSource(NULL);
537}
538
539status_t NuPlayer::GenericSource::feedMoreTSData() {
540    return OK;
541}
542
543void NuPlayer::GenericSource::schedulePollBuffering() {
544    sp<AMessage> msg = new AMessage(kWhatPollBuffering, this);
545    msg->setInt32("generation", mPollBufferingGeneration);
546    msg->post(1000000ll);
547}
548
549void NuPlayer::GenericSource::cancelPollBuffering() {
550    mBuffering = false;
551    ++mPollBufferingGeneration;
552    mPrevBufferPercentage = -1;
553}
554
555void NuPlayer::GenericSource::restartPollBuffering() {
556    if (mIsStreaming) {
557        cancelPollBuffering();
558        onPollBuffering();
559    }
560}
561
562void NuPlayer::GenericSource::notifyBufferingUpdate(int32_t percentage) {
563    // Buffering percent could go backward as it's estimated from remaining
564    // data and last access time. This could cause the buffering position
565    // drawn on media control to jitter slightly. Remember previously reported
566    // percentage and don't allow it to go backward.
567    if (percentage < mPrevBufferPercentage) {
568        percentage = mPrevBufferPercentage;
569    } else if (percentage > 100) {
570        percentage = 100;
571    }
572
573    mPrevBufferPercentage = percentage;
574
575    ALOGV("notifyBufferingUpdate: buffering %d%%", percentage);
576
577    sp<AMessage> msg = dupNotify();
578    msg->setInt32("what", kWhatBufferingUpdate);
579    msg->setInt32("percentage", percentage);
580    msg->post();
581}
582
583void NuPlayer::GenericSource::startBufferingIfNecessary() {
584    ALOGV("startBufferingIfNecessary: mPrepareBuffering=%d, mBuffering=%d",
585            mPrepareBuffering, mBuffering);
586
587    if (mPrepareBuffering) {
588        return;
589    }
590
591    if (!mBuffering) {
592        mBuffering = true;
593
594        ensureCacheIsFetching();
595        sendCacheStats();
596
597        sp<AMessage> notify = dupNotify();
598        notify->setInt32("what", kWhatPauseOnBufferingStart);
599        notify->post();
600    }
601}
602
603void NuPlayer::GenericSource::stopBufferingIfNecessary() {
604    ALOGV("stopBufferingIfNecessary: mPrepareBuffering=%d, mBuffering=%d",
605            mPrepareBuffering, mBuffering);
606
607    if (mPrepareBuffering) {
608        mPrepareBuffering = false;
609        notifyPrepared();
610        return;
611    }
612
613    if (mBuffering) {
614        mBuffering = false;
615
616        sendCacheStats();
617
618        sp<AMessage> notify = dupNotify();
619        notify->setInt32("what", kWhatResumeOnBufferingEnd);
620        notify->post();
621    }
622}
623
624void NuPlayer::GenericSource::sendCacheStats() {
625    int32_t kbps = 0;
626    status_t err = UNKNOWN_ERROR;
627
628    if (mWVMExtractor != NULL) {
629        err = mWVMExtractor->getEstimatedBandwidthKbps(&kbps);
630    } else if (mCachedSource != NULL) {
631        err = mCachedSource->getEstimatedBandwidthKbps(&kbps);
632    }
633
634    if (err == OK) {
635        sp<AMessage> notify = dupNotify();
636        notify->setInt32("what", kWhatCacheStats);
637        notify->setInt32("bandwidth", kbps);
638        notify->post();
639    }
640}
641
642void NuPlayer::GenericSource::ensureCacheIsFetching() {
643    if (mCachedSource != NULL) {
644        mCachedSource->resumeFetchingIfNecessary();
645    }
646}
647
648void NuPlayer::GenericSource::onPollBuffering() {
649    status_t finalStatus = UNKNOWN_ERROR;
650    int64_t cachedDurationUs = -1ll;
651    ssize_t cachedDataRemaining = -1;
652
653    ALOGW_IF(mWVMExtractor != NULL && mCachedSource != NULL,
654            "WVMExtractor and NuCachedSource both present");
655
656    if (mWVMExtractor != NULL) {
657        cachedDurationUs =
658                mWVMExtractor->getCachedDurationUs(&finalStatus);
659    } else if (mCachedSource != NULL) {
660        cachedDataRemaining =
661                mCachedSource->approxDataRemaining(&finalStatus);
662
663        if (finalStatus == OK) {
664            off64_t size;
665            int64_t bitrate = 0ll;
666            if (mDurationUs > 0 && mCachedSource->getSize(&size) == OK) {
667                bitrate = size * 8000000ll / mDurationUs;
668            } else if (mBitrate > 0) {
669                bitrate = mBitrate;
670            }
671            if (bitrate > 0) {
672                cachedDurationUs = cachedDataRemaining * 8000000ll / bitrate;
673            }
674        }
675    }
676
677    if (finalStatus != OK) {
678        ALOGV("onPollBuffering: EOS (finalStatus = %d)", finalStatus);
679
680        if (finalStatus == ERROR_END_OF_STREAM) {
681            notifyBufferingUpdate(100);
682        }
683
684        stopBufferingIfNecessary();
685        return;
686    } else if (cachedDurationUs >= 0ll) {
687        if (mDurationUs > 0ll) {
688            int64_t cachedPosUs = getLastReadPosition() + cachedDurationUs;
689            int percentage = 100.0 * cachedPosUs / mDurationUs;
690            if (percentage > 100) {
691                percentage = 100;
692            }
693
694            notifyBufferingUpdate(percentage);
695        }
696
697        ALOGV("onPollBuffering: cachedDurationUs %.1f sec",
698                cachedDurationUs / 1000000.0f);
699
700        if (cachedDurationUs < kLowWaterMarkUs) {
701            startBufferingIfNecessary();
702        } else if (cachedDurationUs > kHighWaterMarkUs) {
703            stopBufferingIfNecessary();
704        }
705    } else if (cachedDataRemaining >= 0) {
706        ALOGV("onPollBuffering: cachedDataRemaining %zd bytes",
707                cachedDataRemaining);
708
709        if (cachedDataRemaining < kLowWaterMarkBytes) {
710            startBufferingIfNecessary();
711        } else if (cachedDataRemaining > kHighWaterMarkBytes) {
712            stopBufferingIfNecessary();
713        }
714    }
715
716    schedulePollBuffering();
717}
718
719void NuPlayer::GenericSource::onMessageReceived(const sp<AMessage> &msg) {
720    switch (msg->what()) {
721      case kWhatPrepareAsync:
722      {
723          onPrepareAsync();
724          break;
725      }
726      case kWhatFetchSubtitleData:
727      {
728          fetchTextData(kWhatSendSubtitleData, MEDIA_TRACK_TYPE_SUBTITLE,
729                  mFetchSubtitleDataGeneration, mSubtitleTrack.mPackets, msg);
730          break;
731      }
732
733      case kWhatFetchTimedTextData:
734      {
735          fetchTextData(kWhatSendTimedTextData, MEDIA_TRACK_TYPE_TIMEDTEXT,
736                  mFetchTimedTextDataGeneration, mTimedTextTrack.mPackets, msg);
737          break;
738      }
739
740      case kWhatSendSubtitleData:
741      {
742          sendTextData(kWhatSubtitleData, MEDIA_TRACK_TYPE_SUBTITLE,
743                  mFetchSubtitleDataGeneration, mSubtitleTrack.mPackets, msg);
744          break;
745      }
746
747      case kWhatSendTimedTextData:
748      {
749          sendTextData(kWhatTimedTextData, MEDIA_TRACK_TYPE_TIMEDTEXT,
750                  mFetchTimedTextDataGeneration, mTimedTextTrack.mPackets, msg);
751          break;
752      }
753
754      case kWhatChangeAVSource:
755      {
756          int32_t trackIndex;
757          CHECK(msg->findInt32("trackIndex", &trackIndex));
758          const sp<MediaSource> source = mSources.itemAt(trackIndex);
759
760          Track* track;
761          const char *mime;
762          media_track_type trackType, counterpartType;
763          sp<MetaData> meta = source->getFormat();
764          meta->findCString(kKeyMIMEType, &mime);
765          if (!strncasecmp(mime, "audio/", 6)) {
766              track = &mAudioTrack;
767              trackType = MEDIA_TRACK_TYPE_AUDIO;
768              counterpartType = MEDIA_TRACK_TYPE_VIDEO;;
769          } else {
770              CHECK(!strncasecmp(mime, "video/", 6));
771              track = &mVideoTrack;
772              trackType = MEDIA_TRACK_TYPE_VIDEO;
773              counterpartType = MEDIA_TRACK_TYPE_AUDIO;;
774          }
775
776
777          if (track->mSource != NULL) {
778              track->mSource->stop();
779          }
780          track->mSource = source;
781          track->mSource->start();
782          track->mIndex = trackIndex;
783
784          int64_t timeUs, actualTimeUs;
785          const bool formatChange = true;
786          if (trackType == MEDIA_TRACK_TYPE_AUDIO) {
787              timeUs = mAudioLastDequeueTimeUs;
788          } else {
789              timeUs = mVideoLastDequeueTimeUs;
790          }
791          readBuffer(trackType, timeUs, &actualTimeUs, formatChange);
792          readBuffer(counterpartType, -1, NULL, formatChange);
793          ALOGV("timeUs %lld actualTimeUs %lld", (long long)timeUs, (long long)actualTimeUs);
794
795          break;
796      }
797
798      case kWhatStart:
799      case kWhatResume:
800      {
801          restartPollBuffering();
802          break;
803      }
804
805      case kWhatPollBuffering:
806      {
807          int32_t generation;
808          CHECK(msg->findInt32("generation", &generation));
809          if (generation == mPollBufferingGeneration) {
810              onPollBuffering();
811          }
812          break;
813      }
814
815      case kWhatGetFormat:
816      {
817          onGetFormatMeta(msg);
818          break;
819      }
820
821      case kWhatGetSelectedTrack:
822      {
823          onGetSelectedTrack(msg);
824          break;
825      }
826
827      case kWhatSelectTrack:
828      {
829          onSelectTrack(msg);
830          break;
831      }
832
833      case kWhatSeek:
834      {
835          onSeek(msg);
836          break;
837      }
838
839      case kWhatReadBuffer:
840      {
841          onReadBuffer(msg);
842          break;
843      }
844
845      case kWhatSecureDecodersInstantiated:
846      {
847          int32_t err;
848          CHECK(msg->findInt32("err", &err));
849          onSecureDecodersInstantiated(err);
850          break;
851      }
852
853      case kWhatStopWidevine:
854      {
855          // mStopRead is only used for Widevine to prevent the video source
856          // from being read while the associated video decoder is shutting down.
857          mStopRead = true;
858          if (mVideoTrack.mSource != NULL) {
859              mVideoTrack.mPackets->clear();
860          }
861          sp<AMessage> response = new AMessage;
862          sp<AReplyToken> replyID;
863          CHECK(msg->senderAwaitsResponse(&replyID));
864          response->postReply(replyID);
865          break;
866      }
867      default:
868          Source::onMessageReceived(msg);
869          break;
870    }
871}
872
873void NuPlayer::GenericSource::fetchTextData(
874        uint32_t sendWhat,
875        media_track_type type,
876        int32_t curGen,
877        sp<AnotherPacketSource> packets,
878        sp<AMessage> msg) {
879    int32_t msgGeneration;
880    CHECK(msg->findInt32("generation", &msgGeneration));
881    if (msgGeneration != curGen) {
882        // stale
883        return;
884    }
885
886    int32_t avail;
887    if (packets->hasBufferAvailable(&avail)) {
888        return;
889    }
890
891    int64_t timeUs;
892    CHECK(msg->findInt64("timeUs", &timeUs));
893
894    int64_t subTimeUs;
895    readBuffer(type, timeUs, &subTimeUs);
896
897    int64_t delayUs = subTimeUs - timeUs;
898    if (msg->what() == kWhatFetchSubtitleData) {
899        const int64_t oneSecUs = 1000000ll;
900        delayUs -= oneSecUs;
901    }
902    sp<AMessage> msg2 = new AMessage(sendWhat, this);
903    msg2->setInt32("generation", msgGeneration);
904    msg2->post(delayUs < 0 ? 0 : delayUs);
905}
906
907void NuPlayer::GenericSource::sendTextData(
908        uint32_t what,
909        media_track_type type,
910        int32_t curGen,
911        sp<AnotherPacketSource> packets,
912        sp<AMessage> msg) {
913    int32_t msgGeneration;
914    CHECK(msg->findInt32("generation", &msgGeneration));
915    if (msgGeneration != curGen) {
916        // stale
917        return;
918    }
919
920    int64_t subTimeUs;
921    if (packets->nextBufferTime(&subTimeUs) != OK) {
922        return;
923    }
924
925    int64_t nextSubTimeUs;
926    readBuffer(type, -1, &nextSubTimeUs);
927
928    sp<ABuffer> buffer;
929    status_t dequeueStatus = packets->dequeueAccessUnit(&buffer);
930    if (dequeueStatus == OK) {
931        sp<AMessage> notify = dupNotify();
932        notify->setInt32("what", what);
933        notify->setBuffer("buffer", buffer);
934        notify->post();
935
936        const int64_t delayUs = nextSubTimeUs - subTimeUs;
937        msg->post(delayUs < 0 ? 0 : delayUs);
938    }
939}
940
941sp<MetaData> NuPlayer::GenericSource::getFormatMeta(bool audio) {
942    sp<AMessage> msg = new AMessage(kWhatGetFormat, this);
943    msg->setInt32("audio", audio);
944
945    sp<AMessage> response;
946    void *format;
947    status_t err = msg->postAndAwaitResponse(&response);
948    if (err == OK && response != NULL) {
949        CHECK(response->findPointer("format", &format));
950        return (MetaData *)format;
951    } else {
952        return NULL;
953    }
954}
955
956void NuPlayer::GenericSource::onGetFormatMeta(sp<AMessage> msg) const {
957    int32_t audio;
958    CHECK(msg->findInt32("audio", &audio));
959
960    sp<AMessage> response = new AMessage;
961    sp<MetaData> format = doGetFormatMeta(audio);
962    response->setPointer("format", format.get());
963
964    sp<AReplyToken> replyID;
965    CHECK(msg->senderAwaitsResponse(&replyID));
966    response->postReply(replyID);
967}
968
969sp<MetaData> NuPlayer::GenericSource::doGetFormatMeta(bool audio) const {
970    sp<MediaSource> source = audio ? mAudioTrack.mSource : mVideoTrack.mSource;
971
972    if (source == NULL) {
973        return NULL;
974    }
975
976    return source->getFormat();
977}
978
979status_t NuPlayer::GenericSource::dequeueAccessUnit(
980        bool audio, sp<ABuffer> *accessUnit) {
981    Track *track = audio ? &mAudioTrack : &mVideoTrack;
982
983    if (track->mSource == NULL) {
984        return -EWOULDBLOCK;
985    }
986
987    if (mIsWidevine && !audio) {
988        // try to read a buffer as we may not have been able to the last time
989        postReadBuffer(MEDIA_TRACK_TYPE_VIDEO);
990    }
991
992    status_t finalResult;
993    if (!track->mPackets->hasBufferAvailable(&finalResult)) {
994        if (finalResult == OK) {
995            postReadBuffer(
996                    audio ? MEDIA_TRACK_TYPE_AUDIO : MEDIA_TRACK_TYPE_VIDEO);
997            return -EWOULDBLOCK;
998        }
999        return finalResult;
1000    }
1001
1002    status_t result = track->mPackets->dequeueAccessUnit(accessUnit);
1003
1004    if (!track->mPackets->hasBufferAvailable(&finalResult)) {
1005        postReadBuffer(audio? MEDIA_TRACK_TYPE_AUDIO : MEDIA_TRACK_TYPE_VIDEO);
1006    }
1007
1008    if (result != OK) {
1009        if (mSubtitleTrack.mSource != NULL) {
1010            mSubtitleTrack.mPackets->clear();
1011            mFetchSubtitleDataGeneration++;
1012        }
1013        if (mTimedTextTrack.mSource != NULL) {
1014            mTimedTextTrack.mPackets->clear();
1015            mFetchTimedTextDataGeneration++;
1016        }
1017        return result;
1018    }
1019
1020    int64_t timeUs;
1021    status_t eosResult; // ignored
1022    CHECK((*accessUnit)->meta()->findInt64("timeUs", &timeUs));
1023    if (audio) {
1024        mAudioLastDequeueTimeUs = timeUs;
1025    } else {
1026        mVideoLastDequeueTimeUs = timeUs;
1027    }
1028
1029    if (mSubtitleTrack.mSource != NULL
1030            && !mSubtitleTrack.mPackets->hasBufferAvailable(&eosResult)) {
1031        sp<AMessage> msg = new AMessage(kWhatFetchSubtitleData, this);
1032        msg->setInt64("timeUs", timeUs);
1033        msg->setInt32("generation", mFetchSubtitleDataGeneration);
1034        msg->post();
1035    }
1036
1037    if (mTimedTextTrack.mSource != NULL
1038            && !mTimedTextTrack.mPackets->hasBufferAvailable(&eosResult)) {
1039        sp<AMessage> msg = new AMessage(kWhatFetchTimedTextData, this);
1040        msg->setInt64("timeUs", timeUs);
1041        msg->setInt32("generation", mFetchTimedTextDataGeneration);
1042        msg->post();
1043    }
1044
1045    return result;
1046}
1047
1048status_t NuPlayer::GenericSource::getDuration(int64_t *durationUs) {
1049    *durationUs = mDurationUs;
1050    return OK;
1051}
1052
1053size_t NuPlayer::GenericSource::getTrackCount() const {
1054    return mSources.size();
1055}
1056
1057sp<AMessage> NuPlayer::GenericSource::getTrackInfo(size_t trackIndex) const {
1058    size_t trackCount = mSources.size();
1059    if (trackIndex >= trackCount) {
1060        return NULL;
1061    }
1062
1063    sp<AMessage> format = new AMessage();
1064    sp<MetaData> meta = mSources.itemAt(trackIndex)->getFormat();
1065
1066    const char *mime;
1067    CHECK(meta->findCString(kKeyMIMEType, &mime));
1068
1069    int32_t trackType;
1070    if (!strncasecmp(mime, "video/", 6)) {
1071        trackType = MEDIA_TRACK_TYPE_VIDEO;
1072    } else if (!strncasecmp(mime, "audio/", 6)) {
1073        trackType = MEDIA_TRACK_TYPE_AUDIO;
1074    } else if (!strcasecmp(mime, MEDIA_MIMETYPE_TEXT_3GPP)) {
1075        trackType = MEDIA_TRACK_TYPE_TIMEDTEXT;
1076    } else {
1077        trackType = MEDIA_TRACK_TYPE_UNKNOWN;
1078    }
1079    format->setInt32("type", trackType);
1080
1081    const char *lang;
1082    if (!meta->findCString(kKeyMediaLanguage, &lang)) {
1083        lang = "und";
1084    }
1085    format->setString("language", lang);
1086
1087    if (trackType == MEDIA_TRACK_TYPE_SUBTITLE) {
1088        format->setString("mime", mime);
1089
1090        int32_t isAutoselect = 1, isDefault = 0, isForced = 0;
1091        meta->findInt32(kKeyTrackIsAutoselect, &isAutoselect);
1092        meta->findInt32(kKeyTrackIsDefault, &isDefault);
1093        meta->findInt32(kKeyTrackIsForced, &isForced);
1094
1095        format->setInt32("auto", !!isAutoselect);
1096        format->setInt32("default", !!isDefault);
1097        format->setInt32("forced", !!isForced);
1098    }
1099
1100    return format;
1101}
1102
1103ssize_t NuPlayer::GenericSource::getSelectedTrack(media_track_type type) const {
1104    sp<AMessage> msg = new AMessage(kWhatGetSelectedTrack, this);
1105    msg->setInt32("type", type);
1106
1107    sp<AMessage> response;
1108    int32_t index;
1109    status_t err = msg->postAndAwaitResponse(&response);
1110    if (err == OK && response != NULL) {
1111        CHECK(response->findInt32("index", &index));
1112        return index;
1113    } else {
1114        return -1;
1115    }
1116}
1117
1118void NuPlayer::GenericSource::onGetSelectedTrack(sp<AMessage> msg) const {
1119    int32_t tmpType;
1120    CHECK(msg->findInt32("type", &tmpType));
1121    media_track_type type = (media_track_type)tmpType;
1122
1123    sp<AMessage> response = new AMessage;
1124    ssize_t index = doGetSelectedTrack(type);
1125    response->setInt32("index", index);
1126
1127    sp<AReplyToken> replyID;
1128    CHECK(msg->senderAwaitsResponse(&replyID));
1129    response->postReply(replyID);
1130}
1131
1132ssize_t NuPlayer::GenericSource::doGetSelectedTrack(media_track_type type) const {
1133    const Track *track = NULL;
1134    switch (type) {
1135    case MEDIA_TRACK_TYPE_VIDEO:
1136        track = &mVideoTrack;
1137        break;
1138    case MEDIA_TRACK_TYPE_AUDIO:
1139        track = &mAudioTrack;
1140        break;
1141    case MEDIA_TRACK_TYPE_TIMEDTEXT:
1142        track = &mTimedTextTrack;
1143        break;
1144    case MEDIA_TRACK_TYPE_SUBTITLE:
1145        track = &mSubtitleTrack;
1146        break;
1147    default:
1148        break;
1149    }
1150
1151    if (track != NULL && track->mSource != NULL) {
1152        return track->mIndex;
1153    }
1154
1155    return -1;
1156}
1157
1158status_t NuPlayer::GenericSource::selectTrack(size_t trackIndex, bool select, int64_t timeUs) {
1159    ALOGV("%s track: %zu", select ? "select" : "deselect", trackIndex);
1160    sp<AMessage> msg = new AMessage(kWhatSelectTrack, this);
1161    msg->setInt32("trackIndex", trackIndex);
1162    msg->setInt32("select", select);
1163    msg->setInt64("timeUs", timeUs);
1164
1165    sp<AMessage> response;
1166    status_t err = msg->postAndAwaitResponse(&response);
1167    if (err == OK && response != NULL) {
1168        CHECK(response->findInt32("err", &err));
1169    }
1170
1171    return err;
1172}
1173
1174void NuPlayer::GenericSource::onSelectTrack(sp<AMessage> msg) {
1175    int32_t trackIndex, select;
1176    int64_t timeUs;
1177    CHECK(msg->findInt32("trackIndex", &trackIndex));
1178    CHECK(msg->findInt32("select", &select));
1179    CHECK(msg->findInt64("timeUs", &timeUs));
1180
1181    sp<AMessage> response = new AMessage;
1182    status_t err = doSelectTrack(trackIndex, select, timeUs);
1183    response->setInt32("err", err);
1184
1185    sp<AReplyToken> replyID;
1186    CHECK(msg->senderAwaitsResponse(&replyID));
1187    response->postReply(replyID);
1188}
1189
1190status_t NuPlayer::GenericSource::doSelectTrack(size_t trackIndex, bool select, int64_t timeUs) {
1191    if (trackIndex >= mSources.size()) {
1192        return BAD_INDEX;
1193    }
1194
1195    if (!select) {
1196        Track* track = NULL;
1197        if (mSubtitleTrack.mSource != NULL && trackIndex == mSubtitleTrack.mIndex) {
1198            track = &mSubtitleTrack;
1199            mFetchSubtitleDataGeneration++;
1200        } else if (mTimedTextTrack.mSource != NULL && trackIndex == mTimedTextTrack.mIndex) {
1201            track = &mTimedTextTrack;
1202            mFetchTimedTextDataGeneration++;
1203        }
1204        if (track == NULL) {
1205            return INVALID_OPERATION;
1206        }
1207        track->mSource->stop();
1208        track->mSource = NULL;
1209        track->mPackets->clear();
1210        return OK;
1211    }
1212
1213    const sp<MediaSource> source = mSources.itemAt(trackIndex);
1214    sp<MetaData> meta = source->getFormat();
1215    const char *mime;
1216    CHECK(meta->findCString(kKeyMIMEType, &mime));
1217    if (!strncasecmp(mime, "text/", 5)) {
1218        bool isSubtitle = strcasecmp(mime, MEDIA_MIMETYPE_TEXT_3GPP);
1219        Track *track = isSubtitle ? &mSubtitleTrack : &mTimedTextTrack;
1220        if (track->mSource != NULL && track->mIndex == trackIndex) {
1221            return OK;
1222        }
1223        track->mIndex = trackIndex;
1224        if (track->mSource != NULL) {
1225            track->mSource->stop();
1226        }
1227        track->mSource = mSources.itemAt(trackIndex);
1228        track->mSource->start();
1229        if (track->mPackets == NULL) {
1230            track->mPackets = new AnotherPacketSource(track->mSource->getFormat());
1231        } else {
1232            track->mPackets->clear();
1233            track->mPackets->setFormat(track->mSource->getFormat());
1234
1235        }
1236
1237        if (isSubtitle) {
1238            mFetchSubtitleDataGeneration++;
1239        } else {
1240            mFetchTimedTextDataGeneration++;
1241        }
1242
1243        status_t eosResult; // ignored
1244        if (mSubtitleTrack.mSource != NULL
1245                && !mSubtitleTrack.mPackets->hasBufferAvailable(&eosResult)) {
1246            sp<AMessage> msg = new AMessage(kWhatFetchSubtitleData, this);
1247            msg->setInt64("timeUs", timeUs);
1248            msg->setInt32("generation", mFetchSubtitleDataGeneration);
1249            msg->post();
1250        }
1251
1252        if (mTimedTextTrack.mSource != NULL
1253                && !mTimedTextTrack.mPackets->hasBufferAvailable(&eosResult)) {
1254            sp<AMessage> msg = new AMessage(kWhatFetchTimedTextData, this);
1255            msg->setInt64("timeUs", timeUs);
1256            msg->setInt32("generation", mFetchTimedTextDataGeneration);
1257            msg->post();
1258        }
1259
1260        return OK;
1261    } else if (!strncasecmp(mime, "audio/", 6) || !strncasecmp(mime, "video/", 6)) {
1262        bool audio = !strncasecmp(mime, "audio/", 6);
1263        Track *track = audio ? &mAudioTrack : &mVideoTrack;
1264        if (track->mSource != NULL && track->mIndex == trackIndex) {
1265            return OK;
1266        }
1267
1268        sp<AMessage> msg = new AMessage(kWhatChangeAVSource, this);
1269        msg->setInt32("trackIndex", trackIndex);
1270        msg->post();
1271        return OK;
1272    }
1273
1274    return INVALID_OPERATION;
1275}
1276
1277status_t NuPlayer::GenericSource::seekTo(int64_t seekTimeUs) {
1278    sp<AMessage> msg = new AMessage(kWhatSeek, this);
1279    msg->setInt64("seekTimeUs", seekTimeUs);
1280
1281    sp<AMessage> response;
1282    status_t err = msg->postAndAwaitResponse(&response);
1283    if (err == OK && response != NULL) {
1284        CHECK(response->findInt32("err", &err));
1285    }
1286
1287    return err;
1288}
1289
1290void NuPlayer::GenericSource::onSeek(sp<AMessage> msg) {
1291    int64_t seekTimeUs;
1292    CHECK(msg->findInt64("seekTimeUs", &seekTimeUs));
1293
1294    sp<AMessage> response = new AMessage;
1295    status_t err = doSeek(seekTimeUs);
1296    response->setInt32("err", err);
1297
1298    sp<AReplyToken> replyID;
1299    CHECK(msg->senderAwaitsResponse(&replyID));
1300    response->postReply(replyID);
1301}
1302
1303status_t NuPlayer::GenericSource::doSeek(int64_t seekTimeUs) {
1304    // If the Widevine source is stopped, do not attempt to read any
1305    // more buffers.
1306    if (mStopRead) {
1307        return INVALID_OPERATION;
1308    }
1309    if (mVideoTrack.mSource != NULL) {
1310        int64_t actualTimeUs;
1311        readBuffer(MEDIA_TRACK_TYPE_VIDEO, seekTimeUs, &actualTimeUs);
1312
1313        seekTimeUs = actualTimeUs;
1314        mVideoLastDequeueTimeUs = seekTimeUs;
1315    }
1316
1317    if (mAudioTrack.mSource != NULL) {
1318        readBuffer(MEDIA_TRACK_TYPE_AUDIO, seekTimeUs);
1319        mAudioLastDequeueTimeUs = seekTimeUs;
1320    }
1321
1322    setDrmPlaybackStatusIfNeeded(Playback::START, seekTimeUs / 1000);
1323    if (!mStarted) {
1324        setDrmPlaybackStatusIfNeeded(Playback::PAUSE, 0);
1325    }
1326
1327    // If currently buffering, post kWhatBufferingEnd first, so that
1328    // NuPlayer resumes. Otherwise, if cache hits high watermark
1329    // before new polling happens, no one will resume the playback.
1330    stopBufferingIfNecessary();
1331    restartPollBuffering();
1332
1333    return OK;
1334}
1335
1336sp<ABuffer> NuPlayer::GenericSource::mediaBufferToABuffer(
1337        MediaBuffer* mb,
1338        media_track_type trackType,
1339        int64_t /* seekTimeUs */,
1340        int64_t *actualTimeUs) {
1341    bool audio = trackType == MEDIA_TRACK_TYPE_AUDIO;
1342    size_t outLength = mb->range_length();
1343
1344    if (audio && mAudioIsVorbis) {
1345        outLength += sizeof(int32_t);
1346    }
1347
1348    sp<ABuffer> ab;
1349    if (mIsSecure && !audio) {
1350        // data is already provided in the buffer
1351        ab = new ABuffer(NULL, mb->range_length());
1352        mb->add_ref();
1353        ab->setMediaBufferBase(mb);
1354    } else {
1355        ab = new ABuffer(outLength);
1356        memcpy(ab->data(),
1357               (const uint8_t *)mb->data() + mb->range_offset(),
1358               mb->range_length());
1359    }
1360
1361    if (audio && mAudioIsVorbis) {
1362        int32_t numPageSamples;
1363        if (!mb->meta_data()->findInt32(kKeyValidSamples, &numPageSamples)) {
1364            numPageSamples = -1;
1365        }
1366
1367        uint8_t* abEnd = ab->data() + mb->range_length();
1368        memcpy(abEnd, &numPageSamples, sizeof(numPageSamples));
1369    }
1370
1371    sp<AMessage> meta = ab->meta();
1372
1373    int64_t timeUs;
1374    CHECK(mb->meta_data()->findInt64(kKeyTime, &timeUs));
1375    meta->setInt64("timeUs", timeUs);
1376
1377#if 0
1378    // Temporarily disable pre-roll till we have a full solution to handle
1379    // both single seek and continous seek gracefully.
1380    if (seekTimeUs > timeUs) {
1381        sp<AMessage> extra = new AMessage;
1382        extra->setInt64("resume-at-mediaTimeUs", seekTimeUs);
1383        meta->setMessage("extra", extra);
1384    }
1385#endif
1386
1387    if (trackType == MEDIA_TRACK_TYPE_TIMEDTEXT) {
1388        const char *mime;
1389        CHECK(mTimedTextTrack.mSource != NULL
1390                && mTimedTextTrack.mSource->getFormat()->findCString(kKeyMIMEType, &mime));
1391        meta->setString("mime", mime);
1392    }
1393
1394    int64_t durationUs;
1395    if (mb->meta_data()->findInt64(kKeyDuration, &durationUs)) {
1396        meta->setInt64("durationUs", durationUs);
1397    }
1398
1399    if (trackType == MEDIA_TRACK_TYPE_SUBTITLE) {
1400        meta->setInt32("trackIndex", mSubtitleTrack.mIndex);
1401    }
1402
1403    uint32_t dataType; // unused
1404    const void *seiData;
1405    size_t seiLength;
1406    if (mb->meta_data()->findData(kKeySEI, &dataType, &seiData, &seiLength)) {
1407        sp<ABuffer> sei = ABuffer::CreateAsCopy(seiData, seiLength);;
1408        meta->setBuffer("sei", sei);
1409    }
1410
1411    if (actualTimeUs) {
1412        *actualTimeUs = timeUs;
1413    }
1414
1415    mb->release();
1416    mb = NULL;
1417
1418    return ab;
1419}
1420
1421void NuPlayer::GenericSource::postReadBuffer(media_track_type trackType) {
1422    Mutex::Autolock _l(mReadBufferLock);
1423
1424    if ((mPendingReadBufferTypes & (1 << trackType)) == 0) {
1425        mPendingReadBufferTypes |= (1 << trackType);
1426        sp<AMessage> msg = new AMessage(kWhatReadBuffer, this);
1427        msg->setInt32("trackType", trackType);
1428        msg->post();
1429    }
1430}
1431
1432void NuPlayer::GenericSource::onReadBuffer(sp<AMessage> msg) {
1433    int32_t tmpType;
1434    CHECK(msg->findInt32("trackType", &tmpType));
1435    media_track_type trackType = (media_track_type)tmpType;
1436    readBuffer(trackType);
1437    {
1438        // only protect the variable change, as readBuffer may
1439        // take considerable time.
1440        Mutex::Autolock _l(mReadBufferLock);
1441        mPendingReadBufferTypes &= ~(1 << trackType);
1442    }
1443}
1444
1445void NuPlayer::GenericSource::readBuffer(
1446        media_track_type trackType, int64_t seekTimeUs, int64_t *actualTimeUs, bool formatChange) {
1447    // Do not read data if Widevine source is stopped
1448    if (mStopRead) {
1449        return;
1450    }
1451    Track *track;
1452    size_t maxBuffers = 1;
1453    switch (trackType) {
1454        case MEDIA_TRACK_TYPE_VIDEO:
1455            track = &mVideoTrack;
1456            if (mIsWidevine) {
1457                maxBuffers = 2;
1458            }
1459            break;
1460        case MEDIA_TRACK_TYPE_AUDIO:
1461            track = &mAudioTrack;
1462            if (mIsWidevine) {
1463                maxBuffers = 8;
1464            } else {
1465                maxBuffers = 64;
1466            }
1467            break;
1468        case MEDIA_TRACK_TYPE_SUBTITLE:
1469            track = &mSubtitleTrack;
1470            break;
1471        case MEDIA_TRACK_TYPE_TIMEDTEXT:
1472            track = &mTimedTextTrack;
1473            break;
1474        default:
1475            TRESPASS();
1476    }
1477
1478    if (track->mSource == NULL) {
1479        return;
1480    }
1481
1482    if (actualTimeUs) {
1483        *actualTimeUs = seekTimeUs;
1484    }
1485
1486    MediaSource::ReadOptions options;
1487
1488    bool seeking = false;
1489
1490    if (seekTimeUs >= 0) {
1491        options.setSeekTo(seekTimeUs, MediaSource::ReadOptions::SEEK_PREVIOUS_SYNC);
1492        seeking = true;
1493    }
1494
1495    if (mIsWidevine) {
1496        options.setNonBlocking();
1497    }
1498
1499    for (size_t numBuffers = 0; numBuffers < maxBuffers; ) {
1500        MediaBuffer *mbuf;
1501        status_t err = track->mSource->read(&mbuf, &options);
1502
1503        options.clearSeekTo();
1504
1505        if (err == OK) {
1506            int64_t timeUs;
1507            CHECK(mbuf->meta_data()->findInt64(kKeyTime, &timeUs));
1508            if (trackType == MEDIA_TRACK_TYPE_AUDIO) {
1509                mAudioTimeUs = timeUs;
1510            } else if (trackType == MEDIA_TRACK_TYPE_VIDEO) {
1511                mVideoTimeUs = timeUs;
1512            }
1513
1514            // formatChange && seeking: track whose source is changed during selection
1515            // formatChange && !seeking: track whose source is not changed during selection
1516            // !formatChange: normal seek
1517            if ((seeking || formatChange)
1518                    && (trackType == MEDIA_TRACK_TYPE_AUDIO
1519                    || trackType == MEDIA_TRACK_TYPE_VIDEO)) {
1520                ATSParser::DiscontinuityType type = (formatChange && seeking)
1521                        ? ATSParser::DISCONTINUITY_FORMATCHANGE
1522                        : ATSParser::DISCONTINUITY_NONE;
1523                track->mPackets->queueDiscontinuity( type, NULL, true /* discard */);
1524            }
1525
1526            sp<ABuffer> buffer = mediaBufferToABuffer(
1527                    mbuf, trackType, seekTimeUs, actualTimeUs);
1528            track->mPackets->queueAccessUnit(buffer);
1529            formatChange = false;
1530            seeking = false;
1531            ++numBuffers;
1532        } else if (err == WOULD_BLOCK) {
1533            break;
1534        } else if (err == INFO_FORMAT_CHANGED) {
1535#if 0
1536            track->mPackets->queueDiscontinuity(
1537                    ATSParser::DISCONTINUITY_FORMATCHANGE,
1538                    NULL,
1539                    false /* discard */);
1540#endif
1541        } else {
1542            track->mPackets->signalEOS(err);
1543            break;
1544        }
1545    }
1546}
1547
1548}  // namespace android
1549