GenericSource.cpp revision fcd3e94c075e964670d946f6ec5d82d059bf9e09 
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
127sp<MetaData> NuPlayer::GenericSource::getFileFormatMeta() const {
128    return mFileMeta;
129}
130
131status_t NuPlayer::GenericSource::initFromDataSource() {
132    sp<MediaExtractor> extractor;
133    String8 mimeType;
134    float confidence;
135    sp<AMessage> dummy;
136    bool isWidevineStreaming = false;
137
138    CHECK(mDataSource != NULL);
139
140    if (mIsWidevine) {
141        isWidevineStreaming = SniffWVM(
142                mDataSource, &mimeType, &confidence, &dummy);
143        if (!isWidevineStreaming ||
144                strcasecmp(
145                    mimeType.string(), MEDIA_MIMETYPE_CONTAINER_WVM)) {
146            ALOGE("unsupported widevine mime: %s", mimeType.string());
147            return UNKNOWN_ERROR;
148        }
149    } else if (mIsStreaming) {
150        if (!mDataSource->sniff(&mimeType, &confidence, &dummy)) {
151            return UNKNOWN_ERROR;
152        }
153        isWidevineStreaming = !strcasecmp(
154                mimeType.string(), MEDIA_MIMETYPE_CONTAINER_WVM);
155    }
156
157    if (isWidevineStreaming) {
158        // we don't want cached source for widevine streaming.
159        mCachedSource.clear();
160        mDataSource = mHttpSource;
161        mWVMExtractor = new WVMExtractor(mDataSource);
162        mWVMExtractor->setAdaptiveStreamingMode(true);
163        if (mUIDValid) {
164            mWVMExtractor->setUID(mUID);
165        }
166        extractor = mWVMExtractor;
167    } else {
168        extractor = MediaExtractor::Create(mDataSource,
169                mimeType.isEmpty() ? NULL : mimeType.string());
170    }
171
172    if (extractor == NULL) {
173        return UNKNOWN_ERROR;
174    }
175
176    if (extractor->getDrmFlag()) {
177        checkDrmStatus(mDataSource);
178    }
179
180    mFileMeta = extractor->getMetaData();
181    if (mFileMeta != NULL) {
182        int64_t duration;
183        if (mFileMeta->findInt64(kKeyDuration, &duration)) {
184            mDurationUs = duration;
185        }
186
187        if (!mIsWidevine) {
188            // Check mime to see if we actually have a widevine source.
189            // If the data source is not URL-type (eg. file source), we
190            // won't be able to tell until now.
191            const char *fileMime;
192            if (mFileMeta->findCString(kKeyMIMEType, &fileMime)
193                    && !strncasecmp(fileMime, "video/wvm", 9)) {
194                mIsWidevine = true;
195            }
196        }
197    }
198
199    int32_t totalBitrate = 0;
200
201    size_t numtracks = extractor->countTracks();
202    if (numtracks == 0) {
203        return UNKNOWN_ERROR;
204    }
205
206    for (size_t i = 0; i < numtracks; ++i) {
207        sp<MediaSource> track = extractor->getTrack(i);
208
209        sp<MetaData> meta = extractor->getTrackMetaData(i);
210
211        const char *mime;
212        CHECK(meta->findCString(kKeyMIMEType, &mime));
213
214        // Do the string compare immediately with "mime",
215        // we can't assume "mime" would stay valid after another
216        // extractor operation, some extractors might modify meta
217        // during getTrack() and make it invalid.
218        if (!strncasecmp(mime, "audio/", 6)) {
219            if (mAudioTrack.mSource == NULL) {
220                mAudioTrack.mIndex = i;
221                mAudioTrack.mSource = track;
222                mAudioTrack.mPackets =
223                    new AnotherPacketSource(mAudioTrack.mSource->getFormat());
224
225                if (!strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_VORBIS)) {
226                    mAudioIsVorbis = true;
227                } else {
228                    mAudioIsVorbis = false;
229                }
230            }
231        } else if (!strncasecmp(mime, "video/", 6)) {
232            if (mVideoTrack.mSource == NULL) {
233                mVideoTrack.mIndex = i;
234                mVideoTrack.mSource = track;
235                mVideoTrack.mPackets =
236                    new AnotherPacketSource(mVideoTrack.mSource->getFormat());
237
238                // check if the source requires secure buffers
239                int32_t secure;
240                if (meta->findInt32(kKeyRequiresSecureBuffers, &secure)
241                        && secure) {
242                    mIsSecure = true;
243                    if (mUIDValid) {
244                        extractor->setUID(mUID);
245                    }
246                }
247            }
248        }
249
250        if (track != NULL) {
251            mSources.push(track);
252            int64_t durationUs;
253            if (meta->findInt64(kKeyDuration, &durationUs)) {
254                if (durationUs > mDurationUs) {
255                    mDurationUs = durationUs;
256                }
257            }
258
259            int32_t bitrate;
260            if (totalBitrate >= 0 && meta->findInt32(kKeyBitRate, &bitrate)) {
261                totalBitrate += bitrate;
262            } else {
263                totalBitrate = -1;
264            }
265        }
266    }
267
268    mBitrate = totalBitrate;
269
270    return OK;
271}
272
273status_t NuPlayer::GenericSource::startSources() {
274    // Start the selected A/V tracks now before we start buffering.
275    // Widevine sources might re-initialize crypto when starting, if we delay
276    // this to start(), all data buffered during prepare would be wasted.
277    // (We don't actually start reading until start().)
278    if (mAudioTrack.mSource != NULL && mAudioTrack.mSource->start() != OK) {
279        ALOGE("failed to start audio track!");
280        return UNKNOWN_ERROR;
281    }
282
283    if (mVideoTrack.mSource != NULL && mVideoTrack.mSource->start() != OK) {
284        ALOGE("failed to start video track!");
285        return UNKNOWN_ERROR;
286    }
287
288    return OK;
289}
290
291void NuPlayer::GenericSource::checkDrmStatus(const sp<DataSource>& dataSource) {
292    dataSource->getDrmInfo(mDecryptHandle, &mDrmManagerClient);
293    if (mDecryptHandle != NULL) {
294        CHECK(mDrmManagerClient);
295        if (RightsStatus::RIGHTS_VALID != mDecryptHandle->status) {
296            sp<AMessage> msg = dupNotify();
297            msg->setInt32("what", kWhatDrmNoLicense);
298            msg->post();
299        }
300    }
301}
302
303int64_t NuPlayer::GenericSource::getLastReadPosition() {
304    if (mAudioTrack.mSource != NULL) {
305        return mAudioTimeUs;
306    } else if (mVideoTrack.mSource != NULL) {
307        return mVideoTimeUs;
308    } else {
309        return 0;
310    }
311}
312
313status_t NuPlayer::GenericSource::setBuffers(
314        bool audio, Vector<MediaBuffer *> &buffers) {
315    if (mIsSecure && !audio) {
316        return mVideoTrack.mSource->setBuffers(buffers);
317    }
318    return INVALID_OPERATION;
319}
320
321NuPlayer::GenericSource::~GenericSource() {
322    if (mLooper != NULL) {
323        mLooper->unregisterHandler(id());
324        mLooper->stop();
325    }
326    resetDataSource();
327}
328
329void NuPlayer::GenericSource::prepareAsync() {
330    if (mLooper == NULL) {
331        mLooper = new ALooper;
332        mLooper->setName("generic");
333        mLooper->start();
334
335        mLooper->registerHandler(this);
336    }
337
338    sp<AMessage> msg = new AMessage(kWhatPrepareAsync, this);
339    msg->post();
340}
341
342void NuPlayer::GenericSource::onPrepareAsync() {
343    // delayed data source creation
344    if (mDataSource == NULL) {
345        // set to false first, if the extractor
346        // comes back as secure, set it to true then.
347        mIsSecure = false;
348
349        if (!mUri.empty()) {
350            const char* uri = mUri.c_str();
351            String8 contentType;
352            mIsWidevine = !strncasecmp(uri, "widevine://", 11);
353
354            if (!strncasecmp("http://", uri, 7)
355                    || !strncasecmp("https://", uri, 8)
356                    || mIsWidevine) {
357                mHttpSource = DataSource::CreateMediaHTTP(mHTTPService);
358                if (mHttpSource == NULL) {
359                    ALOGE("Failed to create http source!");
360                    notifyPreparedAndCleanup(UNKNOWN_ERROR);
361                    return;
362                }
363            }
364
365            mDataSource = DataSource::CreateFromURI(
366                   mHTTPService, uri, &mUriHeaders, &contentType,
367                   static_cast<HTTPBase *>(mHttpSource.get()));
368        } else {
369            mIsWidevine = false;
370
371            mDataSource = new FileSource(mFd, mOffset, mLength);
372            mFd = -1;
373        }
374
375        if (mDataSource == NULL) {
376            ALOGE("Failed to create data source!");
377            notifyPreparedAndCleanup(UNKNOWN_ERROR);
378            return;
379        }
380
381        if (mDataSource->flags() & DataSource::kIsCachingDataSource) {
382            mCachedSource = static_cast<NuCachedSource2 *>(mDataSource.get());
383        }
384
385        // For widevine or other cached streaming cases, we need to wait for
386        // enough buffering before reporting prepared.
387        // Note that even when URL doesn't start with widevine://, mIsWidevine
388        // could still be set to true later, if the streaming or file source
389        // is sniffed to be widevine. We don't want to buffer for file source
390        // in that case, so must check the flag now.
391        mIsStreaming = (mIsWidevine || mCachedSource != NULL);
392    }
393
394    // init extractor from data source
395    status_t err = initFromDataSource();
396
397    if (err != OK) {
398        ALOGE("Failed to init from data source!");
399        notifyPreparedAndCleanup(err);
400        return;
401    }
402
403    if (mVideoTrack.mSource != NULL) {
404        sp<MetaData> meta = doGetFormatMeta(false /* audio */);
405        sp<AMessage> msg = new AMessage;
406        err = convertMetaDataToMessage(meta, &msg);
407        if(err != OK) {
408            notifyPreparedAndCleanup(err);
409            return;
410        }
411        notifyVideoSizeChanged(msg);
412    }
413
414    notifyFlagsChanged(
415            (mIsSecure ? FLAG_SECURE : 0)
416            | (mDecryptHandle != NULL ? FLAG_PROTECTED : 0)
417            | FLAG_CAN_PAUSE
418            | FLAG_CAN_SEEK_BACKWARD
419            | FLAG_CAN_SEEK_FORWARD
420            | FLAG_CAN_SEEK);
421
422    if (mIsSecure) {
423        // secure decoders must be instantiated before starting widevine source
424        sp<AMessage> reply = new AMessage(kWhatSecureDecodersInstantiated, this);
425        notifyInstantiateSecureDecoders(reply);
426    } else {
427        finishPrepareAsync();
428    }
429}
430
431void NuPlayer::GenericSource::onSecureDecodersInstantiated(status_t err) {
432    if (err != OK) {
433        ALOGE("Failed to instantiate secure decoders!");
434        notifyPreparedAndCleanup(err);
435        return;
436    }
437    finishPrepareAsync();
438}
439
440void NuPlayer::GenericSource::finishPrepareAsync() {
441    status_t err = startSources();
442    if (err != OK) {
443        ALOGE("Failed to init start data source!");
444        notifyPreparedAndCleanup(err);
445        return;
446    }
447
448    if (mIsStreaming) {
449        mPrepareBuffering = true;
450
451        ensureCacheIsFetching();
452        restartPollBuffering();
453    } else {
454        notifyPrepared();
455    }
456}
457
458void NuPlayer::GenericSource::notifyPreparedAndCleanup(status_t err) {
459    if (err != OK) {
460        mDataSource.clear();
461        mCachedSource.clear();
462        mHttpSource.clear();
463        mBitrate = -1;
464
465        cancelPollBuffering();
466    }
467    notifyPrepared(err);
468}
469
470void NuPlayer::GenericSource::start() {
471    ALOGI("start");
472
473    mStopRead = false;
474    if (mAudioTrack.mSource != NULL) {
475        postReadBuffer(MEDIA_TRACK_TYPE_AUDIO);
476    }
477
478    if (mVideoTrack.mSource != NULL) {
479        postReadBuffer(MEDIA_TRACK_TYPE_VIDEO);
480    }
481
482    setDrmPlaybackStatusIfNeeded(Playback::START, getLastReadPosition() / 1000);
483    mStarted = true;
484
485    (new AMessage(kWhatStart, this))->post();
486}
487
488void NuPlayer::GenericSource::stop() {
489    // nothing to do, just account for DRM playback status
490    setDrmPlaybackStatusIfNeeded(Playback::STOP, 0);
491    mStarted = false;
492    if (mIsWidevine || mIsSecure) {
493        // For widevine or secure sources we need to prevent any further reads.
494        sp<AMessage> msg = new AMessage(kWhatStopWidevine, this);
495        sp<AMessage> response;
496        (void) msg->postAndAwaitResponse(&response);
497    }
498}
499
500void NuPlayer::GenericSource::pause() {
501    // nothing to do, just account for DRM playback status
502    setDrmPlaybackStatusIfNeeded(Playback::PAUSE, 0);
503    mStarted = false;
504}
505
506void NuPlayer::GenericSource::resume() {
507    // nothing to do, just account for DRM playback status
508    setDrmPlaybackStatusIfNeeded(Playback::START, getLastReadPosition() / 1000);
509    mStarted = true;
510
511    (new AMessage(kWhatResume, this))->post();
512}
513
514void NuPlayer::GenericSource::disconnect() {
515    if (mDataSource != NULL) {
516        // disconnect data source
517        if (mDataSource->flags() & DataSource::kIsCachingDataSource) {
518            static_cast<NuCachedSource2 *>(mDataSource.get())->disconnect();
519        }
520    } else if (mHttpSource != NULL) {
521        static_cast<HTTPBase *>(mHttpSource.get())->disconnect();
522    }
523}
524
525void NuPlayer::GenericSource::setDrmPlaybackStatusIfNeeded(int playbackStatus, int64_t position) {
526    if (mDecryptHandle != NULL) {
527        mDrmManagerClient->setPlaybackStatus(mDecryptHandle, playbackStatus, position);
528    }
529    mSubtitleTrack.mPackets = new AnotherPacketSource(NULL);
530    mTimedTextTrack.mPackets = new AnotherPacketSource(NULL);
531}
532
533status_t NuPlayer::GenericSource::feedMoreTSData() {
534    return OK;
535}
536
537void NuPlayer::GenericSource::schedulePollBuffering() {
538    sp<AMessage> msg = new AMessage(kWhatPollBuffering, this);
539    msg->setInt32("generation", mPollBufferingGeneration);
540    msg->post(1000000ll);
541}
542
543void NuPlayer::GenericSource::cancelPollBuffering() {
544    mBuffering = false;
545    ++mPollBufferingGeneration;
546    mPrevBufferPercentage = -1;
547}
548
549void NuPlayer::GenericSource::restartPollBuffering() {
550    if (mIsStreaming) {
551        cancelPollBuffering();
552        onPollBuffering();
553    }
554}
555
556void NuPlayer::GenericSource::notifyBufferingUpdate(int32_t percentage) {
557    // Buffering percent could go backward as it's estimated from remaining
558    // data and last access time. This could cause the buffering position
559    // drawn on media control to jitter slightly. Remember previously reported
560    // percentage and don't allow it to go backward.
561    if (percentage < mPrevBufferPercentage) {
562        percentage = mPrevBufferPercentage;
563    } else if (percentage > 100) {
564        percentage = 100;
565    }
566
567    mPrevBufferPercentage = percentage;
568
569    ALOGV("notifyBufferingUpdate: buffering %d%%", percentage);
570
571    sp<AMessage> msg = dupNotify();
572    msg->setInt32("what", kWhatBufferingUpdate);
573    msg->setInt32("percentage", percentage);
574    msg->post();
575}
576
577void NuPlayer::GenericSource::startBufferingIfNecessary() {
578    ALOGV("startBufferingIfNecessary: mPrepareBuffering=%d, mBuffering=%d",
579            mPrepareBuffering, mBuffering);
580
581    if (mPrepareBuffering) {
582        return;
583    }
584
585    if (!mBuffering) {
586        mBuffering = true;
587
588        ensureCacheIsFetching();
589        sendCacheStats();
590
591        sp<AMessage> notify = dupNotify();
592        notify->setInt32("what", kWhatPauseOnBufferingStart);
593        notify->post();
594    }
595}
596
597void NuPlayer::GenericSource::stopBufferingIfNecessary() {
598    ALOGV("stopBufferingIfNecessary: mPrepareBuffering=%d, mBuffering=%d",
599            mPrepareBuffering, mBuffering);
600
601    if (mPrepareBuffering) {
602        mPrepareBuffering = false;
603        notifyPrepared();
604        return;
605    }
606
607    if (mBuffering) {
608        mBuffering = false;
609
610        sendCacheStats();
611
612        sp<AMessage> notify = dupNotify();
613        notify->setInt32("what", kWhatResumeOnBufferingEnd);
614        notify->post();
615    }
616}
617
618void NuPlayer::GenericSource::sendCacheStats() {
619    int32_t kbps = 0;
620    status_t err = UNKNOWN_ERROR;
621
622    if (mWVMExtractor != NULL) {
623        err = mWVMExtractor->getEstimatedBandwidthKbps(&kbps);
624    } else if (mCachedSource != NULL) {
625        err = mCachedSource->getEstimatedBandwidthKbps(&kbps);
626    }
627
628    if (err == OK) {
629        sp<AMessage> notify = dupNotify();
630        notify->setInt32("what", kWhatCacheStats);
631        notify->setInt32("bandwidth", kbps);
632        notify->post();
633    }
634}
635
636void NuPlayer::GenericSource::ensureCacheIsFetching() {
637    if (mCachedSource != NULL) {
638        mCachedSource->resumeFetchingIfNecessary();
639    }
640}
641
642void NuPlayer::GenericSource::onPollBuffering() {
643    status_t finalStatus = UNKNOWN_ERROR;
644    int64_t cachedDurationUs = -1ll;
645    ssize_t cachedDataRemaining = -1;
646
647    ALOGW_IF(mWVMExtractor != NULL && mCachedSource != NULL,
648            "WVMExtractor and NuCachedSource both present");
649
650    if (mWVMExtractor != NULL) {
651        cachedDurationUs =
652                mWVMExtractor->getCachedDurationUs(&finalStatus);
653    } else if (mCachedSource != NULL) {
654        cachedDataRemaining =
655                mCachedSource->approxDataRemaining(&finalStatus);
656
657        if (finalStatus == OK) {
658            off64_t size;
659            int64_t bitrate = 0ll;
660            if (mDurationUs > 0 && mCachedSource->getSize(&size) == OK) {
661                bitrate = size * 8000000ll / mDurationUs;
662            } else if (mBitrate > 0) {
663                bitrate = mBitrate;
664            }
665            if (bitrate > 0) {
666                cachedDurationUs = cachedDataRemaining * 8000000ll / bitrate;
667            }
668        }
669    }
670
671    if (finalStatus != OK) {
672        ALOGV("onPollBuffering: EOS (finalStatus = %d)", finalStatus);
673
674        if (finalStatus == ERROR_END_OF_STREAM) {
675            notifyBufferingUpdate(100);
676        }
677
678        stopBufferingIfNecessary();
679        return;
680    } else if (cachedDurationUs >= 0ll) {
681        if (mDurationUs > 0ll) {
682            int64_t cachedPosUs = getLastReadPosition() + cachedDurationUs;
683            int percentage = 100.0 * cachedPosUs / mDurationUs;
684            if (percentage > 100) {
685                percentage = 100;
686            }
687
688            notifyBufferingUpdate(percentage);
689        }
690
691        ALOGV("onPollBuffering: cachedDurationUs %.1f sec",
692                cachedDurationUs / 1000000.0f);
693
694        if (cachedDurationUs < kLowWaterMarkUs) {
695            startBufferingIfNecessary();
696        } else if (cachedDurationUs > kHighWaterMarkUs) {
697            stopBufferingIfNecessary();
698        }
699    } else if (cachedDataRemaining >= 0) {
700        ALOGV("onPollBuffering: cachedDataRemaining %d bytes",
701                cachedDataRemaining);
702
703        if (cachedDataRemaining < kLowWaterMarkBytes) {
704            startBufferingIfNecessary();
705        } else if (cachedDataRemaining > kHighWaterMarkBytes) {
706            stopBufferingIfNecessary();
707        }
708    }
709
710    schedulePollBuffering();
711}
712
713void NuPlayer::GenericSource::onMessageReceived(const sp<AMessage> &msg) {
714    switch (msg->what()) {
715      case kWhatPrepareAsync:
716      {
717          onPrepareAsync();
718          break;
719      }
720      case kWhatFetchSubtitleData:
721      {
722          fetchTextData(kWhatSendSubtitleData, MEDIA_TRACK_TYPE_SUBTITLE,
723                  mFetchSubtitleDataGeneration, mSubtitleTrack.mPackets, msg);
724          break;
725      }
726
727      case kWhatFetchTimedTextData:
728      {
729          fetchTextData(kWhatSendTimedTextData, MEDIA_TRACK_TYPE_TIMEDTEXT,
730                  mFetchTimedTextDataGeneration, mTimedTextTrack.mPackets, msg);
731          break;
732      }
733
734      case kWhatSendSubtitleData:
735      {
736          sendTextData(kWhatSubtitleData, MEDIA_TRACK_TYPE_SUBTITLE,
737                  mFetchSubtitleDataGeneration, mSubtitleTrack.mPackets, msg);
738          break;
739      }
740
741      case kWhatSendTimedTextData:
742      {
743          sendTextData(kWhatTimedTextData, MEDIA_TRACK_TYPE_TIMEDTEXT,
744                  mFetchTimedTextDataGeneration, mTimedTextTrack.mPackets, msg);
745          break;
746      }
747
748      case kWhatChangeAVSource:
749      {
750          int32_t trackIndex;
751          CHECK(msg->findInt32("trackIndex", &trackIndex));
752          const sp<MediaSource> source = mSources.itemAt(trackIndex);
753
754          Track* track;
755          const char *mime;
756          media_track_type trackType, counterpartType;
757          sp<MetaData> meta = source->getFormat();
758          meta->findCString(kKeyMIMEType, &mime);
759          if (!strncasecmp(mime, "audio/", 6)) {
760              track = &mAudioTrack;
761              trackType = MEDIA_TRACK_TYPE_AUDIO;
762              counterpartType = MEDIA_TRACK_TYPE_VIDEO;;
763          } else {
764              CHECK(!strncasecmp(mime, "video/", 6));
765              track = &mVideoTrack;
766              trackType = MEDIA_TRACK_TYPE_VIDEO;
767              counterpartType = MEDIA_TRACK_TYPE_AUDIO;;
768          }
769
770
771          if (track->mSource != NULL) {
772              track->mSource->stop();
773          }
774          track->mSource = source;
775          track->mSource->start();
776          track->mIndex = trackIndex;
777
778          int64_t timeUs, actualTimeUs;
779          const bool formatChange = true;
780          if (trackType == MEDIA_TRACK_TYPE_AUDIO) {
781              timeUs = mAudioLastDequeueTimeUs;
782          } else {
783              timeUs = mVideoLastDequeueTimeUs;
784          }
785          readBuffer(trackType, timeUs, &actualTimeUs, formatChange);
786          readBuffer(counterpartType, -1, NULL, formatChange);
787          ALOGV("timeUs %lld actualTimeUs %lld", timeUs, actualTimeUs);
788
789          break;
790      }
791
792      case kWhatStart:
793      case kWhatResume:
794      {
795          restartPollBuffering();
796          break;
797      }
798
799      case kWhatPollBuffering:
800      {
801          int32_t generation;
802          CHECK(msg->findInt32("generation", &generation));
803          if (generation == mPollBufferingGeneration) {
804              onPollBuffering();
805          }
806          break;
807      }
808
809      case kWhatGetFormat:
810      {
811          onGetFormatMeta(msg);
812          break;
813      }
814
815      case kWhatGetSelectedTrack:
816      {
817          onGetSelectedTrack(msg);
818          break;
819      }
820
821      case kWhatSelectTrack:
822      {
823          onSelectTrack(msg);
824          break;
825      }
826
827      case kWhatSeek:
828      {
829          onSeek(msg);
830          break;
831      }
832
833      case kWhatReadBuffer:
834      {
835          onReadBuffer(msg);
836          break;
837      }
838
839      case kWhatSecureDecodersInstantiated:
840      {
841          int32_t err;
842          CHECK(msg->findInt32("err", &err));
843          onSecureDecodersInstantiated(err);
844          break;
845      }
846
847      case kWhatStopWidevine:
848      {
849          // mStopRead is only used for Widevine to prevent the video source
850          // from being read while the associated video decoder is shutting down.
851          mStopRead = true;
852          if (mVideoTrack.mSource != NULL) {
853              mVideoTrack.mPackets->clear();
854          }
855          sp<AMessage> response = new AMessage;
856          sp<AReplyToken> replyID;
857          CHECK(msg->senderAwaitsResponse(&replyID));
858          response->postReply(replyID);
859          break;
860      }
861      default:
862          Source::onMessageReceived(msg);
863          break;
864    }
865}
866
867void NuPlayer::GenericSource::fetchTextData(
868        uint32_t sendWhat,
869        media_track_type type,
870        int32_t curGen,
871        sp<AnotherPacketSource> packets,
872        sp<AMessage> msg) {
873    int32_t msgGeneration;
874    CHECK(msg->findInt32("generation", &msgGeneration));
875    if (msgGeneration != curGen) {
876        // stale
877        return;
878    }
879
880    int32_t avail;
881    if (packets->hasBufferAvailable(&avail)) {
882        return;
883    }
884
885    int64_t timeUs;
886    CHECK(msg->findInt64("timeUs", &timeUs));
887
888    int64_t subTimeUs;
889    readBuffer(type, timeUs, &subTimeUs);
890
891    int64_t delayUs = subTimeUs - timeUs;
892    if (msg->what() == kWhatFetchSubtitleData) {
893        const int64_t oneSecUs = 1000000ll;
894        delayUs -= oneSecUs;
895    }
896    sp<AMessage> msg2 = new AMessage(sendWhat, this);
897    msg2->setInt32("generation", msgGeneration);
898    msg2->post(delayUs < 0 ? 0 : delayUs);
899}
900
901void NuPlayer::GenericSource::sendTextData(
902        uint32_t what,
903        media_track_type type,
904        int32_t curGen,
905        sp<AnotherPacketSource> packets,
906        sp<AMessage> msg) {
907    int32_t msgGeneration;
908    CHECK(msg->findInt32("generation", &msgGeneration));
909    if (msgGeneration != curGen) {
910        // stale
911        return;
912    }
913
914    int64_t subTimeUs;
915    if (packets->nextBufferTime(&subTimeUs) != OK) {
916        return;
917    }
918
919    int64_t nextSubTimeUs;
920    readBuffer(type, -1, &nextSubTimeUs);
921
922    sp<ABuffer> buffer;
923    status_t dequeueStatus = packets->dequeueAccessUnit(&buffer);
924    if (dequeueStatus == OK) {
925        sp<AMessage> notify = dupNotify();
926        notify->setInt32("what", what);
927        notify->setBuffer("buffer", buffer);
928        notify->post();
929
930        const int64_t delayUs = nextSubTimeUs - subTimeUs;
931        msg->post(delayUs < 0 ? 0 : delayUs);
932    }
933}
934
935sp<MetaData> NuPlayer::GenericSource::getFormatMeta(bool audio) {
936    sp<AMessage> msg = new AMessage(kWhatGetFormat, this);
937    msg->setInt32("audio", audio);
938
939    sp<AMessage> response;
940    void *format;
941    status_t err = msg->postAndAwaitResponse(&response);
942    if (err == OK && response != NULL) {
943        CHECK(response->findPointer("format", &format));
944        return (MetaData *)format;
945    } else {
946        return NULL;
947    }
948}
949
950void NuPlayer::GenericSource::onGetFormatMeta(sp<AMessage> msg) const {
951    int32_t audio;
952    CHECK(msg->findInt32("audio", &audio));
953
954    sp<AMessage> response = new AMessage;
955    sp<MetaData> format = doGetFormatMeta(audio);
956    response->setPointer("format", format.get());
957
958    sp<AReplyToken> replyID;
959    CHECK(msg->senderAwaitsResponse(&replyID));
960    response->postReply(replyID);
961}
962
963sp<MetaData> NuPlayer::GenericSource::doGetFormatMeta(bool audio) const {
964    sp<MediaSource> source = audio ? mAudioTrack.mSource : mVideoTrack.mSource;
965
966    if (source == NULL) {
967        return NULL;
968    }
969
970    return source->getFormat();
971}
972
973status_t NuPlayer::GenericSource::dequeueAccessUnit(
974        bool audio, sp<ABuffer> *accessUnit) {
975    Track *track = audio ? &mAudioTrack : &mVideoTrack;
976
977    if (track->mSource == NULL) {
978        return -EWOULDBLOCK;
979    }
980
981    if (mIsWidevine && !audio) {
982        // try to read a buffer as we may not have been able to the last time
983        postReadBuffer(MEDIA_TRACK_TYPE_VIDEO);
984    }
985
986    status_t finalResult;
987    if (!track->mPackets->hasBufferAvailable(&finalResult)) {
988        if (finalResult == OK) {
989            postReadBuffer(
990                    audio ? MEDIA_TRACK_TYPE_AUDIO : MEDIA_TRACK_TYPE_VIDEO);
991            return -EWOULDBLOCK;
992        }
993        return finalResult;
994    }
995
996    status_t result = track->mPackets->dequeueAccessUnit(accessUnit);
997
998    if (!track->mPackets->hasBufferAvailable(&finalResult)) {
999        postReadBuffer(audio? MEDIA_TRACK_TYPE_AUDIO : MEDIA_TRACK_TYPE_VIDEO);
1000    }
1001
1002    if (result != OK) {
1003        if (mSubtitleTrack.mSource != NULL) {
1004            mSubtitleTrack.mPackets->clear();
1005            mFetchSubtitleDataGeneration++;
1006        }
1007        if (mTimedTextTrack.mSource != NULL) {
1008            mTimedTextTrack.mPackets->clear();
1009            mFetchTimedTextDataGeneration++;
1010        }
1011        return result;
1012    }
1013
1014    int64_t timeUs;
1015    status_t eosResult; // ignored
1016    CHECK((*accessUnit)->meta()->findInt64("timeUs", &timeUs));
1017    if (audio) {
1018        mAudioLastDequeueTimeUs = timeUs;
1019    } else {
1020        mVideoLastDequeueTimeUs = timeUs;
1021    }
1022
1023    if (mSubtitleTrack.mSource != NULL
1024            && !mSubtitleTrack.mPackets->hasBufferAvailable(&eosResult)) {
1025        sp<AMessage> msg = new AMessage(kWhatFetchSubtitleData, this);
1026        msg->setInt64("timeUs", timeUs);
1027        msg->setInt32("generation", mFetchSubtitleDataGeneration);
1028        msg->post();
1029    }
1030
1031    if (mTimedTextTrack.mSource != NULL
1032            && !mTimedTextTrack.mPackets->hasBufferAvailable(&eosResult)) {
1033        sp<AMessage> msg = new AMessage(kWhatFetchTimedTextData, this);
1034        msg->setInt64("timeUs", timeUs);
1035        msg->setInt32("generation", mFetchTimedTextDataGeneration);
1036        msg->post();
1037    }
1038
1039    return result;
1040}
1041
1042status_t NuPlayer::GenericSource::getDuration(int64_t *durationUs) {
1043    *durationUs = mDurationUs;
1044    return OK;
1045}
1046
1047size_t NuPlayer::GenericSource::getTrackCount() const {
1048    return mSources.size();
1049}
1050
1051sp<AMessage> NuPlayer::GenericSource::getTrackInfo(size_t trackIndex) const {
1052    size_t trackCount = mSources.size();
1053    if (trackIndex >= trackCount) {
1054        return NULL;
1055    }
1056
1057    sp<AMessage> format = new AMessage();
1058    sp<MetaData> meta = mSources.itemAt(trackIndex)->getFormat();
1059
1060    const char *mime;
1061    CHECK(meta->findCString(kKeyMIMEType, &mime));
1062
1063    int32_t trackType;
1064    if (!strncasecmp(mime, "video/", 6)) {
1065        trackType = MEDIA_TRACK_TYPE_VIDEO;
1066    } else if (!strncasecmp(mime, "audio/", 6)) {
1067        trackType = MEDIA_TRACK_TYPE_AUDIO;
1068    } else if (!strcasecmp(mime, MEDIA_MIMETYPE_TEXT_3GPP)) {
1069        trackType = MEDIA_TRACK_TYPE_TIMEDTEXT;
1070    } else {
1071        trackType = MEDIA_TRACK_TYPE_UNKNOWN;
1072    }
1073    format->setInt32("type", trackType);
1074
1075    const char *lang;
1076    if (!meta->findCString(kKeyMediaLanguage, &lang)) {
1077        lang = "und";
1078    }
1079    format->setString("language", lang);
1080
1081    if (trackType == MEDIA_TRACK_TYPE_SUBTITLE) {
1082        format->setString("mime", mime);
1083
1084        int32_t isAutoselect = 1, isDefault = 0, isForced = 0;
1085        meta->findInt32(kKeyTrackIsAutoselect, &isAutoselect);
1086        meta->findInt32(kKeyTrackIsDefault, &isDefault);
1087        meta->findInt32(kKeyTrackIsForced, &isForced);
1088
1089        format->setInt32("auto", !!isAutoselect);
1090        format->setInt32("default", !!isDefault);
1091        format->setInt32("forced", !!isForced);
1092    }
1093
1094    return format;
1095}
1096
1097ssize_t NuPlayer::GenericSource::getSelectedTrack(media_track_type type) const {
1098    sp<AMessage> msg = new AMessage(kWhatGetSelectedTrack, this);
1099    msg->setInt32("type", type);
1100
1101    sp<AMessage> response;
1102    int32_t index;
1103    status_t err = msg->postAndAwaitResponse(&response);
1104    if (err == OK && response != NULL) {
1105        CHECK(response->findInt32("index", &index));
1106        return index;
1107    } else {
1108        return -1;
1109    }
1110}
1111
1112void NuPlayer::GenericSource::onGetSelectedTrack(sp<AMessage> msg) const {
1113    int32_t tmpType;
1114    CHECK(msg->findInt32("type", &tmpType));
1115    media_track_type type = (media_track_type)tmpType;
1116
1117    sp<AMessage> response = new AMessage;
1118    ssize_t index = doGetSelectedTrack(type);
1119    response->setInt32("index", index);
1120
1121    sp<AReplyToken> replyID;
1122    CHECK(msg->senderAwaitsResponse(&replyID));
1123    response->postReply(replyID);
1124}
1125
1126ssize_t NuPlayer::GenericSource::doGetSelectedTrack(media_track_type type) const {
1127    const Track *track = NULL;
1128    switch (type) {
1129    case MEDIA_TRACK_TYPE_VIDEO:
1130        track = &mVideoTrack;
1131        break;
1132    case MEDIA_TRACK_TYPE_AUDIO:
1133        track = &mAudioTrack;
1134        break;
1135    case MEDIA_TRACK_TYPE_TIMEDTEXT:
1136        track = &mTimedTextTrack;
1137        break;
1138    case MEDIA_TRACK_TYPE_SUBTITLE:
1139        track = &mSubtitleTrack;
1140        break;
1141    default:
1142        break;
1143    }
1144
1145    if (track != NULL && track->mSource != NULL) {
1146        return track->mIndex;
1147    }
1148
1149    return -1;
1150}
1151
1152status_t NuPlayer::GenericSource::selectTrack(size_t trackIndex, bool select, int64_t timeUs) {
1153    ALOGV("%s track: %zu", select ? "select" : "deselect", trackIndex);
1154    sp<AMessage> msg = new AMessage(kWhatSelectTrack, this);
1155    msg->setInt32("trackIndex", trackIndex);
1156    msg->setInt32("select", select);
1157    msg->setInt64("timeUs", timeUs);
1158
1159    sp<AMessage> response;
1160    status_t err = msg->postAndAwaitResponse(&response);
1161    if (err == OK && response != NULL) {
1162        CHECK(response->findInt32("err", &err));
1163    }
1164
1165    return err;
1166}
1167
1168void NuPlayer::GenericSource::onSelectTrack(sp<AMessage> msg) {
1169    int32_t trackIndex, select;
1170    int64_t timeUs;
1171    CHECK(msg->findInt32("trackIndex", &trackIndex));
1172    CHECK(msg->findInt32("select", &select));
1173    CHECK(msg->findInt64("timeUs", &timeUs));
1174
1175    sp<AMessage> response = new AMessage;
1176    status_t err = doSelectTrack(trackIndex, select, timeUs);
1177    response->setInt32("err", err);
1178
1179    sp<AReplyToken> replyID;
1180    CHECK(msg->senderAwaitsResponse(&replyID));
1181    response->postReply(replyID);
1182}
1183
1184status_t NuPlayer::GenericSource::doSelectTrack(size_t trackIndex, bool select, int64_t timeUs) {
1185    if (trackIndex >= mSources.size()) {
1186        return BAD_INDEX;
1187    }
1188
1189    if (!select) {
1190        Track* track = NULL;
1191        if (mSubtitleTrack.mSource != NULL && trackIndex == mSubtitleTrack.mIndex) {
1192            track = &mSubtitleTrack;
1193            mFetchSubtitleDataGeneration++;
1194        } else if (mTimedTextTrack.mSource != NULL && trackIndex == mTimedTextTrack.mIndex) {
1195            track = &mTimedTextTrack;
1196            mFetchTimedTextDataGeneration++;
1197        }
1198        if (track == NULL) {
1199            return INVALID_OPERATION;
1200        }
1201        track->mSource->stop();
1202        track->mSource = NULL;
1203        track->mPackets->clear();
1204        return OK;
1205    }
1206
1207    const sp<MediaSource> source = mSources.itemAt(trackIndex);
1208    sp<MetaData> meta = source->getFormat();
1209    const char *mime;
1210    CHECK(meta->findCString(kKeyMIMEType, &mime));
1211    if (!strncasecmp(mime, "text/", 5)) {
1212        bool isSubtitle = strcasecmp(mime, MEDIA_MIMETYPE_TEXT_3GPP);
1213        Track *track = isSubtitle ? &mSubtitleTrack : &mTimedTextTrack;
1214        if (track->mSource != NULL && track->mIndex == trackIndex) {
1215            return OK;
1216        }
1217        track->mIndex = trackIndex;
1218        if (track->mSource != NULL) {
1219            track->mSource->stop();
1220        }
1221        track->mSource = mSources.itemAt(trackIndex);
1222        track->mSource->start();
1223        if (track->mPackets == NULL) {
1224            track->mPackets = new AnotherPacketSource(track->mSource->getFormat());
1225        } else {
1226            track->mPackets->clear();
1227            track->mPackets->setFormat(track->mSource->getFormat());
1228
1229        }
1230
1231        if (isSubtitle) {
1232            mFetchSubtitleDataGeneration++;
1233        } else {
1234            mFetchTimedTextDataGeneration++;
1235        }
1236
1237        status_t eosResult; // ignored
1238        if (mSubtitleTrack.mSource != NULL
1239                && !mSubtitleTrack.mPackets->hasBufferAvailable(&eosResult)) {
1240            sp<AMessage> msg = new AMessage(kWhatFetchSubtitleData, this);
1241            msg->setInt64("timeUs", timeUs);
1242            msg->setInt32("generation", mFetchSubtitleDataGeneration);
1243            msg->post();
1244        }
1245
1246        if (mTimedTextTrack.mSource != NULL
1247                && !mTimedTextTrack.mPackets->hasBufferAvailable(&eosResult)) {
1248            sp<AMessage> msg = new AMessage(kWhatFetchTimedTextData, this);
1249            msg->setInt64("timeUs", timeUs);
1250            msg->setInt32("generation", mFetchTimedTextDataGeneration);
1251            msg->post();
1252        }
1253
1254        return OK;
1255    } else if (!strncasecmp(mime, "audio/", 6) || !strncasecmp(mime, "video/", 6)) {
1256        bool audio = !strncasecmp(mime, "audio/", 6);
1257        Track *track = audio ? &mAudioTrack : &mVideoTrack;
1258        if (track->mSource != NULL && track->mIndex == trackIndex) {
1259            return OK;
1260        }
1261
1262        sp<AMessage> msg = new AMessage(kWhatChangeAVSource, this);
1263        msg->setInt32("trackIndex", trackIndex);
1264        msg->post();
1265        return OK;
1266    }
1267
1268    return INVALID_OPERATION;
1269}
1270
1271status_t NuPlayer::GenericSource::seekTo(int64_t seekTimeUs) {
1272    sp<AMessage> msg = new AMessage(kWhatSeek, this);
1273    msg->setInt64("seekTimeUs", seekTimeUs);
1274
1275    sp<AMessage> response;
1276    status_t err = msg->postAndAwaitResponse(&response);
1277    if (err == OK && response != NULL) {
1278        CHECK(response->findInt32("err", &err));
1279    }
1280
1281    return err;
1282}
1283
1284void NuPlayer::GenericSource::onSeek(sp<AMessage> msg) {
1285    int64_t seekTimeUs;
1286    CHECK(msg->findInt64("seekTimeUs", &seekTimeUs));
1287
1288    sp<AMessage> response = new AMessage;
1289    status_t err = doSeek(seekTimeUs);
1290    response->setInt32("err", err);
1291
1292    sp<AReplyToken> replyID;
1293    CHECK(msg->senderAwaitsResponse(&replyID));
1294    response->postReply(replyID);
1295}
1296
1297status_t NuPlayer::GenericSource::doSeek(int64_t seekTimeUs) {
1298    // If the Widevine source is stopped, do not attempt to read any
1299    // more buffers.
1300    if (mStopRead) {
1301        return INVALID_OPERATION;
1302    }
1303    if (mVideoTrack.mSource != NULL) {
1304        int64_t actualTimeUs;
1305        readBuffer(MEDIA_TRACK_TYPE_VIDEO, seekTimeUs, &actualTimeUs);
1306
1307        seekTimeUs = actualTimeUs;
1308        mVideoLastDequeueTimeUs = seekTimeUs;
1309    }
1310
1311    if (mAudioTrack.mSource != NULL) {
1312        readBuffer(MEDIA_TRACK_TYPE_AUDIO, seekTimeUs);
1313        mAudioLastDequeueTimeUs = seekTimeUs;
1314    }
1315
1316    setDrmPlaybackStatusIfNeeded(Playback::START, seekTimeUs / 1000);
1317    if (!mStarted) {
1318        setDrmPlaybackStatusIfNeeded(Playback::PAUSE, 0);
1319    }
1320
1321    // If currently buffering, post kWhatBufferingEnd first, so that
1322    // NuPlayer resumes. Otherwise, if cache hits high watermark
1323    // before new polling happens, no one will resume the playback.
1324    stopBufferingIfNecessary();
1325    restartPollBuffering();
1326
1327    return OK;
1328}
1329
1330sp<ABuffer> NuPlayer::GenericSource::mediaBufferToABuffer(
1331        MediaBuffer* mb,
1332        media_track_type trackType,
1333        int64_t /* seekTimeUs */,
1334        int64_t *actualTimeUs) {
1335    bool audio = trackType == MEDIA_TRACK_TYPE_AUDIO;
1336    size_t outLength = mb->range_length();
1337
1338    if (audio && mAudioIsVorbis) {
1339        outLength += sizeof(int32_t);
1340    }
1341
1342    sp<ABuffer> ab;
1343    if (mIsSecure && !audio) {
1344        // data is already provided in the buffer
1345        ab = new ABuffer(NULL, mb->range_length());
1346        mb->add_ref();
1347        ab->setMediaBufferBase(mb);
1348    } else {
1349        ab = new ABuffer(outLength);
1350        memcpy(ab->data(),
1351               (const uint8_t *)mb->data() + mb->range_offset(),
1352               mb->range_length());
1353    }
1354
1355    if (audio && mAudioIsVorbis) {
1356        int32_t numPageSamples;
1357        if (!mb->meta_data()->findInt32(kKeyValidSamples, &numPageSamples)) {
1358            numPageSamples = -1;
1359        }
1360
1361        uint8_t* abEnd = ab->data() + mb->range_length();
1362        memcpy(abEnd, &numPageSamples, sizeof(numPageSamples));
1363    }
1364
1365    sp<AMessage> meta = ab->meta();
1366
1367    int64_t timeUs;
1368    CHECK(mb->meta_data()->findInt64(kKeyTime, &timeUs));
1369    meta->setInt64("timeUs", timeUs);
1370
1371#if 0
1372    // Temporarily disable pre-roll till we have a full solution to handle
1373    // both single seek and continous seek gracefully.
1374    if (seekTimeUs > timeUs) {
1375        sp<AMessage> extra = new AMessage;
1376        extra->setInt64("resume-at-mediaTimeUs", seekTimeUs);
1377        meta->setMessage("extra", extra);
1378    }
1379#endif
1380
1381    if (trackType == MEDIA_TRACK_TYPE_TIMEDTEXT) {
1382        const char *mime;
1383        CHECK(mTimedTextTrack.mSource != NULL
1384                && mTimedTextTrack.mSource->getFormat()->findCString(kKeyMIMEType, &mime));
1385        meta->setString("mime", mime);
1386    }
1387
1388    int64_t durationUs;
1389    if (mb->meta_data()->findInt64(kKeyDuration, &durationUs)) {
1390        meta->setInt64("durationUs", durationUs);
1391    }
1392
1393    if (trackType == MEDIA_TRACK_TYPE_SUBTITLE) {
1394        meta->setInt32("trackIndex", mSubtitleTrack.mIndex);
1395    }
1396
1397    if (actualTimeUs) {
1398        *actualTimeUs = timeUs;
1399    }
1400
1401    mb->release();
1402    mb = NULL;
1403
1404    return ab;
1405}
1406
1407void NuPlayer::GenericSource::postReadBuffer(media_track_type trackType) {
1408    Mutex::Autolock _l(mReadBufferLock);
1409
1410    if ((mPendingReadBufferTypes & (1 << trackType)) == 0) {
1411        mPendingReadBufferTypes |= (1 << trackType);
1412        sp<AMessage> msg = new AMessage(kWhatReadBuffer, this);
1413        msg->setInt32("trackType", trackType);
1414        msg->post();
1415    }
1416}
1417
1418void NuPlayer::GenericSource::onReadBuffer(sp<AMessage> msg) {
1419    int32_t tmpType;
1420    CHECK(msg->findInt32("trackType", &tmpType));
1421    media_track_type trackType = (media_track_type)tmpType;
1422    readBuffer(trackType);
1423    {
1424        // only protect the variable change, as readBuffer may
1425        // take considerable time.
1426        Mutex::Autolock _l(mReadBufferLock);
1427        mPendingReadBufferTypes &= ~(1 << trackType);
1428    }
1429}
1430
1431void NuPlayer::GenericSource::readBuffer(
1432        media_track_type trackType, int64_t seekTimeUs, int64_t *actualTimeUs, bool formatChange) {
1433    // Do not read data if Widevine source is stopped
1434    if (mStopRead) {
1435        return;
1436    }
1437    Track *track;
1438    size_t maxBuffers = 1;
1439    switch (trackType) {
1440        case MEDIA_TRACK_TYPE_VIDEO:
1441            track = &mVideoTrack;
1442            if (mIsWidevine) {
1443                maxBuffers = 2;
1444            }
1445            break;
1446        case MEDIA_TRACK_TYPE_AUDIO:
1447            track = &mAudioTrack;
1448            if (mIsWidevine) {
1449                maxBuffers = 8;
1450            } else {
1451                maxBuffers = 64;
1452            }
1453            break;
1454        case MEDIA_TRACK_TYPE_SUBTITLE:
1455            track = &mSubtitleTrack;
1456            break;
1457        case MEDIA_TRACK_TYPE_TIMEDTEXT:
1458            track = &mTimedTextTrack;
1459            break;
1460        default:
1461            TRESPASS();
1462    }
1463
1464    if (track->mSource == NULL) {
1465        return;
1466    }
1467
1468    if (actualTimeUs) {
1469        *actualTimeUs = seekTimeUs;
1470    }
1471
1472    MediaSource::ReadOptions options;
1473
1474    bool seeking = false;
1475
1476    if (seekTimeUs >= 0) {
1477        options.setSeekTo(seekTimeUs, MediaSource::ReadOptions::SEEK_PREVIOUS_SYNC);
1478        seeking = true;
1479    }
1480
1481    if (mIsWidevine) {
1482        options.setNonBlocking();
1483    }
1484
1485    for (size_t numBuffers = 0; numBuffers < maxBuffers; ) {
1486        MediaBuffer *mbuf;
1487        status_t err = track->mSource->read(&mbuf, &options);
1488
1489        options.clearSeekTo();
1490
1491        if (err == OK) {
1492            int64_t timeUs;
1493            CHECK(mbuf->meta_data()->findInt64(kKeyTime, &timeUs));
1494            if (trackType == MEDIA_TRACK_TYPE_AUDIO) {
1495                mAudioTimeUs = timeUs;
1496            } else if (trackType == MEDIA_TRACK_TYPE_VIDEO) {
1497                mVideoTimeUs = timeUs;
1498            }
1499
1500            // formatChange && seeking: track whose source is changed during selection
1501            // formatChange && !seeking: track whose source is not changed during selection
1502            // !formatChange: normal seek
1503            if ((seeking || formatChange)
1504                    && (trackType == MEDIA_TRACK_TYPE_AUDIO
1505                    || trackType == MEDIA_TRACK_TYPE_VIDEO)) {
1506                ATSParser::DiscontinuityType type = (formatChange && seeking)
1507                        ? ATSParser::DISCONTINUITY_FORMATCHANGE
1508                        : ATSParser::DISCONTINUITY_NONE;
1509                track->mPackets->queueDiscontinuity( type, NULL, true /* discard */);
1510            }
1511
1512            sp<ABuffer> buffer = mediaBufferToABuffer(
1513                    mbuf, trackType, seekTimeUs, actualTimeUs);
1514            track->mPackets->queueAccessUnit(buffer);
1515            formatChange = false;
1516            seeking = false;
1517            ++numBuffers;
1518        } else if (err == WOULD_BLOCK) {
1519            break;
1520        } else if (err == INFO_FORMAT_CHANGED) {
1521#if 0
1522            track->mPackets->queueDiscontinuity(
1523                    ATSParser::DISCONTINUITY_FORMATCHANGE,
1524                    NULL,
1525                    false /* discard */);
1526#endif
1527        } else {
1528            track->mPackets->signalEOS(err);
1529            break;
1530        }
1531    }
1532}
1533
1534}  // namespace android
1535