GenericSource.cpp revision 0a15431888e843c81888760052e7446bbd386030 
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      mMetaDataSize(-1ll),
69      mBitrate(-1ll),
70      mPollBufferingGeneration(0),
71      mPendingReadBufferTypes(0),
72      mBuffering(false),
73      mPrepareBuffering(false) {
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 (mSniffedMIME.empty()) {
151            if (!mDataSource->sniff(&mimeType, &confidence, &dummy)) {
152                return UNKNOWN_ERROR;
153            }
154            mSniffedMIME = mimeType.string();
155        }
156        isWidevineStreaming = !strcasecmp(
157                mSniffedMIME.c_str(), MEDIA_MIMETYPE_CONTAINER_WVM);
158    }
159
160    if (isWidevineStreaming) {
161        // we don't want cached source for widevine streaming.
162        mCachedSource.clear();
163        mDataSource = mHttpSource;
164        mWVMExtractor = new WVMExtractor(mDataSource);
165        mWVMExtractor->setAdaptiveStreamingMode(true);
166        if (mUIDValid) {
167            mWVMExtractor->setUID(mUID);
168        }
169        extractor = mWVMExtractor;
170    } else {
171        extractor = MediaExtractor::Create(mDataSource,
172                mSniffedMIME.empty() ? NULL: mSniffedMIME.c_str());
173    }
174
175    if (extractor == NULL) {
176        return UNKNOWN_ERROR;
177    }
178
179    if (extractor->getDrmFlag()) {
180        checkDrmStatus(mDataSource);
181    }
182
183    mFileMeta = extractor->getMetaData();
184    if (mFileMeta != NULL) {
185        int64_t duration;
186        if (mFileMeta->findInt64(kKeyDuration, &duration)) {
187            mDurationUs = duration;
188        }
189
190        if (!mIsWidevine) {
191            // Check mime to see if we actually have a widevine source.
192            // If the data source is not URL-type (eg. file source), we
193            // won't be able to tell until now.
194            const char *fileMime;
195            if (mFileMeta->findCString(kKeyMIMEType, &fileMime)
196                    && !strncasecmp(fileMime, "video/wvm", 9)) {
197                mIsWidevine = true;
198            }
199        }
200    }
201
202    int32_t totalBitrate = 0;
203
204    size_t numtracks = extractor->countTracks();
205    if (numtracks == 0) {
206        return UNKNOWN_ERROR;
207    }
208
209    for (size_t i = 0; i < numtracks; ++i) {
210        sp<MediaSource> track = extractor->getTrack(i);
211
212        sp<MetaData> meta = extractor->getTrackMetaData(i);
213
214        const char *mime;
215        CHECK(meta->findCString(kKeyMIMEType, &mime));
216
217        // Do the string compare immediately with "mime",
218        // we can't assume "mime" would stay valid after another
219        // extractor operation, some extractors might modify meta
220        // during getTrack() and make it invalid.
221        if (!strncasecmp(mime, "audio/", 6)) {
222            if (mAudioTrack.mSource == NULL) {
223                mAudioTrack.mIndex = i;
224                mAudioTrack.mSource = track;
225                mAudioTrack.mPackets =
226                    new AnotherPacketSource(mAudioTrack.mSource->getFormat());
227
228                if (!strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_VORBIS)) {
229                    mAudioIsVorbis = true;
230                } else {
231                    mAudioIsVorbis = false;
232                }
233            }
234        } else if (!strncasecmp(mime, "video/", 6)) {
235            if (mVideoTrack.mSource == NULL) {
236                mVideoTrack.mIndex = i;
237                mVideoTrack.mSource = track;
238                mVideoTrack.mPackets =
239                    new AnotherPacketSource(mVideoTrack.mSource->getFormat());
240
241                // check if the source requires secure buffers
242                int32_t secure;
243                if (meta->findInt32(kKeyRequiresSecureBuffers, &secure)
244                        && secure) {
245                    mIsSecure = true;
246                    if (mUIDValid) {
247                        extractor->setUID(mUID);
248                    }
249                }
250            }
251        }
252
253        if (track != NULL) {
254            mSources.push(track);
255            int64_t durationUs;
256            if (meta->findInt64(kKeyDuration, &durationUs)) {
257                if (durationUs > mDurationUs) {
258                    mDurationUs = durationUs;
259                }
260            }
261
262            int32_t bitrate;
263            if (totalBitrate >= 0 && meta->findInt32(kKeyBitRate, &bitrate)) {
264                totalBitrate += bitrate;
265            } else {
266                totalBitrate = -1;
267            }
268        }
269    }
270
271    // Start the selected A/V tracks now before we start buffering.
272    // Widevine sources might re-initialize crypto when starting, if we delay
273    // this to start(), all data buffered during prepare would be wasted.
274    // (We don't actually start reading until start().)
275    if (mAudioTrack.mSource != NULL && mAudioTrack.mSource->start() != OK) {
276        ALOGE("failed to start audio track!");
277        return UNKNOWN_ERROR;
278    }
279
280    if (mVideoTrack.mSource != NULL && mVideoTrack.mSource->start() != OK) {
281        ALOGE("failed to start video track!");
282        return UNKNOWN_ERROR;
283    }
284
285    mBitrate = totalBitrate;
286
287    return OK;
288}
289
290void NuPlayer::GenericSource::checkDrmStatus(const sp<DataSource>& dataSource) {
291    dataSource->getDrmInfo(mDecryptHandle, &mDrmManagerClient);
292    if (mDecryptHandle != NULL) {
293        CHECK(mDrmManagerClient);
294        if (RightsStatus::RIGHTS_VALID != mDecryptHandle->status) {
295            sp<AMessage> msg = dupNotify();
296            msg->setInt32("what", kWhatDrmNoLicense);
297            msg->post();
298        }
299    }
300}
301
302int64_t NuPlayer::GenericSource::getLastReadPosition() {
303    if (mAudioTrack.mSource != NULL) {
304        return mAudioTimeUs;
305    } else if (mVideoTrack.mSource != NULL) {
306        return mVideoTimeUs;
307    } else {
308        return 0;
309    }
310}
311
312status_t NuPlayer::GenericSource::setBuffers(
313        bool audio, Vector<MediaBuffer *> &buffers) {
314    if (mIsSecure && !audio) {
315        return mVideoTrack.mSource->setBuffers(buffers);
316    }
317    return INVALID_OPERATION;
318}
319
320NuPlayer::GenericSource::~GenericSource() {
321    if (mLooper != NULL) {
322        mLooper->unregisterHandler(id());
323        mLooper->stop();
324    }
325    resetDataSource();
326}
327
328void NuPlayer::GenericSource::prepareAsync() {
329    if (mLooper == NULL) {
330        mLooper = new ALooper;
331        mLooper->setName("generic");
332        mLooper->start();
333
334        mLooper->registerHandler(this);
335    }
336
337    sp<AMessage> msg = new AMessage(kWhatPrepareAsync, id());
338    msg->post();
339}
340
341void NuPlayer::GenericSource::onPrepareAsync() {
342    // delayed data source creation
343    if (mDataSource == NULL) {
344        // set to false first, if the extractor
345        // comes back as secure, set it to true then.
346        mIsSecure = false;
347
348        if (!mUri.empty()) {
349            const char* uri = mUri.c_str();
350            mIsWidevine = !strncasecmp(uri, "widevine://", 11);
351
352            if (!strncasecmp("http://", uri, 7)
353                    || !strncasecmp("https://", uri, 8)
354                    || mIsWidevine) {
355                mHttpSource = DataSource::CreateMediaHTTP(mHTTPService);
356                if (mHttpSource == NULL) {
357                    ALOGE("Failed to create http source!");
358                    notifyPreparedAndCleanup(UNKNOWN_ERROR);
359                    return;
360                }
361            }
362
363            mDataSource = DataSource::CreateFromURI(
364                   mHTTPService, uri, &mUriHeaders, &mContentType,
365                   static_cast<HTTPBase *>(mHttpSource.get()));
366        } else {
367            mIsWidevine = false;
368
369            mDataSource = new FileSource(mFd, mOffset, mLength);
370            mFd = -1;
371        }
372
373        if (mDataSource == NULL) {
374            ALOGE("Failed to create data source!");
375            notifyPreparedAndCleanup(UNKNOWN_ERROR);
376            return;
377        }
378
379        if (mDataSource->flags() & DataSource::kIsCachingDataSource) {
380            mCachedSource = static_cast<NuCachedSource2 *>(mDataSource.get());
381        }
382
383        // For widevine or other cached streaming cases, we need to wait for
384        // enough buffering before reporting prepared.
385        // Note that even when URL doesn't start with widevine://, mIsWidevine
386        // could still be set to true later, if the streaming or file source
387        // is sniffed to be widevine. We don't want to buffer for file source
388        // in that case, so must check the flag now.
389        mIsStreaming = (mIsWidevine || mCachedSource != NULL);
390    }
391
392    // check initial caching status
393    status_t err = prefillCacheIfNecessary();
394    if (err != OK) {
395        if (err == -EAGAIN) {
396            (new AMessage(kWhatPrepareAsync, id()))->post(200000);
397        } else {
398            ALOGE("Failed to prefill data cache!");
399            notifyPreparedAndCleanup(UNKNOWN_ERROR);
400        }
401        return;
402    }
403
404    // init extrator from data source
405    err = initFromDataSource();
406
407    if (err != OK) {
408        ALOGE("Failed to init from data source!");
409        notifyPreparedAndCleanup(err);
410        return;
411    }
412
413    if (mVideoTrack.mSource != NULL) {
414        sp<MetaData> meta = doGetFormatMeta(false /* audio */);
415        sp<AMessage> msg = new AMessage;
416        err = convertMetaDataToMessage(meta, &msg);
417        if(err != OK) {
418            notifyPreparedAndCleanup(err);
419            return;
420        }
421        notifyVideoSizeChanged(msg);
422    }
423
424    notifyFlagsChanged(
425            (mIsSecure ? FLAG_SECURE : 0)
426            | (mDecryptHandle != NULL ? FLAG_PROTECTED : 0)
427            | FLAG_CAN_PAUSE
428            | FLAG_CAN_SEEK_BACKWARD
429            | FLAG_CAN_SEEK_FORWARD
430            | FLAG_CAN_SEEK);
431
432    if (mIsStreaming) {
433        mPrepareBuffering = true;
434
435        ensureCacheIsFetching();
436        restartPollBuffering();
437    } else {
438        notifyPrepared();
439    }
440}
441
442void NuPlayer::GenericSource::notifyPreparedAndCleanup(status_t err) {
443    if (err != OK) {
444        mMetaDataSize = -1ll;
445        mContentType = "";
446        mSniffedMIME = "";
447        mDataSource.clear();
448        mCachedSource.clear();
449        mHttpSource.clear();
450
451        cancelPollBuffering();
452    }
453    notifyPrepared(err);
454}
455
456status_t NuPlayer::GenericSource::prefillCacheIfNecessary() {
457    CHECK(mDataSource != NULL);
458
459    if (mCachedSource == NULL) {
460        // no prefill if the data source is not cached
461        return OK;
462    }
463
464    // We're not doing this for streams that appear to be audio-only
465    // streams to ensure that even low bandwidth streams start
466    // playing back fairly instantly.
467    if (!strncasecmp(mContentType.string(), "audio/", 6)) {
468        return OK;
469    }
470
471    // We're going to prefill the cache before trying to instantiate
472    // the extractor below, as the latter is an operation that otherwise
473    // could block on the datasource for a significant amount of time.
474    // During that time we'd be unable to abort the preparation phase
475    // without this prefill.
476
477    // Initially make sure we have at least 192 KB for the sniff
478    // to complete without blocking.
479    static const size_t kMinBytesForSniffing = 192 * 1024;
480    static const size_t kDefaultMetaSize = 200000;
481
482    status_t finalStatus;
483
484    size_t cachedDataRemaining =
485            mCachedSource->approxDataRemaining(&finalStatus);
486
487    if (finalStatus != OK || (mMetaDataSize >= 0
488            && (off64_t)cachedDataRemaining >= mMetaDataSize)) {
489        ALOGV("stop caching, status %d, "
490                "metaDataSize %lld, cachedDataRemaining %zu",
491                finalStatus, mMetaDataSize, cachedDataRemaining);
492        return OK;
493    }
494
495    ALOGV("now cached %zu bytes of data", cachedDataRemaining);
496
497    if (mMetaDataSize < 0
498            && cachedDataRemaining >= kMinBytesForSniffing) {
499        String8 tmp;
500        float confidence;
501        sp<AMessage> meta;
502        if (!mCachedSource->sniff(&tmp, &confidence, &meta)) {
503            return UNKNOWN_ERROR;
504        }
505
506        // We successfully identified the file's extractor to
507        // be, remember this mime type so we don't have to
508        // sniff it again when we call MediaExtractor::Create()
509        mSniffedMIME = tmp.string();
510
511        if (meta == NULL
512                || !meta->findInt64("meta-data-size",
513                        reinterpret_cast<int64_t*>(&mMetaDataSize))) {
514            mMetaDataSize = kDefaultMetaSize;
515        }
516
517        if (mMetaDataSize < 0ll) {
518            ALOGE("invalid metaDataSize = %lld bytes", mMetaDataSize);
519            return UNKNOWN_ERROR;
520        }
521    }
522
523    return -EAGAIN;
524}
525
526void NuPlayer::GenericSource::start() {
527    ALOGI("start");
528
529    mStopRead = false;
530    if (mAudioTrack.mSource != NULL) {
531        postReadBuffer(MEDIA_TRACK_TYPE_AUDIO);
532    }
533
534    if (mVideoTrack.mSource != NULL) {
535        postReadBuffer(MEDIA_TRACK_TYPE_VIDEO);
536    }
537
538    setDrmPlaybackStatusIfNeeded(Playback::START, getLastReadPosition() / 1000);
539    mStarted = true;
540
541    (new AMessage(kWhatStart, id()))->post();
542}
543
544void NuPlayer::GenericSource::stop() {
545    // nothing to do, just account for DRM playback status
546    setDrmPlaybackStatusIfNeeded(Playback::STOP, 0);
547    mStarted = false;
548    if (mIsWidevine || mIsSecure) {
549        // For widevine or secure sources we need to prevent any further reads.
550        sp<AMessage> msg = new AMessage(kWhatStopWidevine, id());
551        sp<AMessage> response;
552        (void) msg->postAndAwaitResponse(&response);
553    }
554}
555
556void NuPlayer::GenericSource::pause() {
557    // nothing to do, just account for DRM playback status
558    setDrmPlaybackStatusIfNeeded(Playback::PAUSE, 0);
559    mStarted = false;
560}
561
562void NuPlayer::GenericSource::resume() {
563    // nothing to do, just account for DRM playback status
564    setDrmPlaybackStatusIfNeeded(Playback::START, getLastReadPosition() / 1000);
565    mStarted = true;
566
567    (new AMessage(kWhatResume, id()))->post();
568}
569
570void NuPlayer::GenericSource::disconnect() {
571    if (mDataSource != NULL) {
572        // disconnect data source
573        if (mDataSource->flags() & DataSource::kIsCachingDataSource) {
574            static_cast<NuCachedSource2 *>(mDataSource.get())->disconnect();
575        }
576    } else if (mHttpSource != NULL) {
577        static_cast<HTTPBase *>(mHttpSource.get())->disconnect();
578    }
579}
580
581void NuPlayer::GenericSource::setDrmPlaybackStatusIfNeeded(int playbackStatus, int64_t position) {
582    if (mDecryptHandle != NULL) {
583        mDrmManagerClient->setPlaybackStatus(mDecryptHandle, playbackStatus, position);
584    }
585    mSubtitleTrack.mPackets = new AnotherPacketSource(NULL);
586    mTimedTextTrack.mPackets = new AnotherPacketSource(NULL);
587}
588
589status_t NuPlayer::GenericSource::feedMoreTSData() {
590    return OK;
591}
592
593void NuPlayer::GenericSource::schedulePollBuffering() {
594    sp<AMessage> msg = new AMessage(kWhatPollBuffering, id());
595    msg->setInt32("generation", mPollBufferingGeneration);
596    msg->post(1000000ll);
597}
598
599void NuPlayer::GenericSource::cancelPollBuffering() {
600    mBuffering = false;
601    ++mPollBufferingGeneration;
602}
603
604void NuPlayer::GenericSource::restartPollBuffering() {
605    if (mIsStreaming) {
606        cancelPollBuffering();
607        onPollBuffering();
608    }
609}
610
611void NuPlayer::GenericSource::notifyBufferingUpdate(int percentage) {
612    ALOGV("notifyBufferingUpdate: buffering %d%%", percentage);
613
614    sp<AMessage> msg = dupNotify();
615    msg->setInt32("what", kWhatBufferingUpdate);
616    msg->setInt32("percentage", percentage);
617    msg->post();
618}
619
620void NuPlayer::GenericSource::startBufferingIfNecessary() {
621    ALOGV("startBufferingIfNecessary: mPrepareBuffering=%d, mBuffering=%d",
622            mPrepareBuffering, mBuffering);
623
624    if (mPrepareBuffering) {
625        return;
626    }
627
628    if (!mBuffering) {
629        mBuffering = true;
630
631        ensureCacheIsFetching();
632        sendCacheStats();
633
634        sp<AMessage> notify = dupNotify();
635        notify->setInt32("what", kWhatPauseOnBufferingStart);
636        notify->post();
637    }
638}
639
640void NuPlayer::GenericSource::stopBufferingIfNecessary() {
641    ALOGV("stopBufferingIfNecessary: mPrepareBuffering=%d, mBuffering=%d",
642            mPrepareBuffering, mBuffering);
643
644    if (mPrepareBuffering) {
645        mPrepareBuffering = false;
646        notifyPrepared();
647        return;
648    }
649
650    if (mBuffering) {
651        mBuffering = false;
652
653        sendCacheStats();
654
655        sp<AMessage> notify = dupNotify();
656        notify->setInt32("what", kWhatResumeOnBufferingEnd);
657        notify->post();
658    }
659}
660
661void NuPlayer::GenericSource::sendCacheStats() {
662    int32_t kbps = 0;
663    status_t err = UNKNOWN_ERROR;
664
665    if (mWVMExtractor != NULL) {
666        err = mWVMExtractor->getEstimatedBandwidthKbps(&kbps);
667    } else if (mCachedSource != NULL) {
668        err = mCachedSource->getEstimatedBandwidthKbps(&kbps);
669    }
670
671    if (err == OK) {
672        sp<AMessage> notify = dupNotify();
673        notify->setInt32("what", kWhatCacheStats);
674        notify->setInt32("bandwidth", kbps);
675        notify->post();
676    }
677}
678
679void NuPlayer::GenericSource::ensureCacheIsFetching() {
680    if (mCachedSource != NULL) {
681        mCachedSource->resumeFetchingIfNecessary();
682    }
683}
684
685void NuPlayer::GenericSource::onPollBuffering() {
686    status_t finalStatus = UNKNOWN_ERROR;
687    int64_t cachedDurationUs = -1ll;
688    ssize_t cachedDataRemaining = -1;
689
690    ALOGW_IF(mWVMExtractor != NULL && mCachedSource != NULL,
691            "WVMExtractor and NuCachedSource both present");
692
693    if (mWVMExtractor != NULL) {
694        cachedDurationUs =
695                mWVMExtractor->getCachedDurationUs(&finalStatus);
696    } else if (mCachedSource != NULL) {
697        cachedDataRemaining =
698                mCachedSource->approxDataRemaining(&finalStatus);
699
700        if (finalStatus == OK) {
701            off64_t size;
702            int64_t bitrate = 0ll;
703            if (mDurationUs > 0 && mCachedSource->getSize(&size) == OK) {
704                bitrate = size * 8000000ll / mDurationUs;
705            } else if (mBitrate > 0) {
706                bitrate = mBitrate;
707            }
708            if (bitrate > 0) {
709                cachedDurationUs = cachedDataRemaining * 8000000ll / bitrate;
710            }
711        }
712    }
713
714    if (finalStatus != OK) {
715        ALOGV("onPollBuffering: EOS (finalStatus = %d)", finalStatus);
716
717        if (finalStatus == ERROR_END_OF_STREAM) {
718            notifyBufferingUpdate(100);
719        }
720
721        stopBufferingIfNecessary();
722        return;
723    } else if (cachedDurationUs >= 0ll) {
724        if (mDurationUs > 0ll) {
725            int64_t cachedPosUs = getLastReadPosition() + cachedDurationUs;
726            int percentage = 100.0 * cachedPosUs / mDurationUs;
727            if (percentage > 100) {
728                percentage = 100;
729            }
730
731            notifyBufferingUpdate(percentage);
732        }
733
734        ALOGV("onPollBuffering: cachedDurationUs %.1f sec",
735                cachedDurationUs / 1000000.0f);
736
737        if (cachedDurationUs < kLowWaterMarkUs) {
738            startBufferingIfNecessary();
739        } else if (cachedDurationUs > kHighWaterMarkUs) {
740            stopBufferingIfNecessary();
741        }
742    } else if (cachedDataRemaining >= 0) {
743        ALOGV("onPollBuffering: cachedDataRemaining %d bytes",
744                cachedDataRemaining);
745
746        if (cachedDataRemaining < kLowWaterMarkBytes) {
747            startBufferingIfNecessary();
748        } else if (cachedDataRemaining > kHighWaterMarkBytes) {
749            stopBufferingIfNecessary();
750        }
751    }
752
753    schedulePollBuffering();
754}
755
756void NuPlayer::GenericSource::onMessageReceived(const sp<AMessage> &msg) {
757    switch (msg->what()) {
758      case kWhatPrepareAsync:
759      {
760          onPrepareAsync();
761          break;
762      }
763      case kWhatFetchSubtitleData:
764      {
765          fetchTextData(kWhatSendSubtitleData, MEDIA_TRACK_TYPE_SUBTITLE,
766                  mFetchSubtitleDataGeneration, mSubtitleTrack.mPackets, msg);
767          break;
768      }
769
770      case kWhatFetchTimedTextData:
771      {
772          fetchTextData(kWhatSendTimedTextData, MEDIA_TRACK_TYPE_TIMEDTEXT,
773                  mFetchTimedTextDataGeneration, mTimedTextTrack.mPackets, msg);
774          break;
775      }
776
777      case kWhatSendSubtitleData:
778      {
779          sendTextData(kWhatSubtitleData, MEDIA_TRACK_TYPE_SUBTITLE,
780                  mFetchSubtitleDataGeneration, mSubtitleTrack.mPackets, msg);
781          break;
782      }
783
784      case kWhatSendTimedTextData:
785      {
786          sendTextData(kWhatTimedTextData, MEDIA_TRACK_TYPE_TIMEDTEXT,
787                  mFetchTimedTextDataGeneration, mTimedTextTrack.mPackets, msg);
788          break;
789      }
790
791      case kWhatChangeAVSource:
792      {
793          int32_t trackIndex;
794          CHECK(msg->findInt32("trackIndex", &trackIndex));
795          const sp<MediaSource> source = mSources.itemAt(trackIndex);
796
797          Track* track;
798          const char *mime;
799          media_track_type trackType, counterpartType;
800          sp<MetaData> meta = source->getFormat();
801          meta->findCString(kKeyMIMEType, &mime);
802          if (!strncasecmp(mime, "audio/", 6)) {
803              track = &mAudioTrack;
804              trackType = MEDIA_TRACK_TYPE_AUDIO;
805              counterpartType = MEDIA_TRACK_TYPE_VIDEO;;
806          } else {
807              CHECK(!strncasecmp(mime, "video/", 6));
808              track = &mVideoTrack;
809              trackType = MEDIA_TRACK_TYPE_VIDEO;
810              counterpartType = MEDIA_TRACK_TYPE_AUDIO;;
811          }
812
813
814          if (track->mSource != NULL) {
815              track->mSource->stop();
816          }
817          track->mSource = source;
818          track->mSource->start();
819          track->mIndex = trackIndex;
820
821          int64_t timeUs, actualTimeUs;
822          const bool formatChange = true;
823          if (trackType == MEDIA_TRACK_TYPE_AUDIO) {
824              timeUs = mAudioLastDequeueTimeUs;
825          } else {
826              timeUs = mVideoLastDequeueTimeUs;
827          }
828          readBuffer(trackType, timeUs, &actualTimeUs, formatChange);
829          readBuffer(counterpartType, -1, NULL, formatChange);
830          ALOGV("timeUs %lld actualTimeUs %lld", timeUs, actualTimeUs);
831
832          break;
833      }
834
835      case kWhatStart:
836      case kWhatResume:
837      {
838          restartPollBuffering();
839          break;
840      }
841
842      case kWhatPollBuffering:
843      {
844          int32_t generation;
845          CHECK(msg->findInt32("generation", &generation));
846          if (generation == mPollBufferingGeneration) {
847              onPollBuffering();
848          }
849          break;
850      }
851
852      case kWhatGetFormat:
853      {
854          onGetFormatMeta(msg);
855          break;
856      }
857
858      case kWhatGetSelectedTrack:
859      {
860          onGetSelectedTrack(msg);
861          break;
862      }
863
864      case kWhatSelectTrack:
865      {
866          onSelectTrack(msg);
867          break;
868      }
869
870      case kWhatSeek:
871      {
872          onSeek(msg);
873          break;
874      }
875
876      case kWhatReadBuffer:
877      {
878          onReadBuffer(msg);
879          break;
880      }
881
882      case kWhatStopWidevine:
883      {
884          // mStopRead is only used for Widevine to prevent the video source
885          // from being read while the associated video decoder is shutting down.
886          mStopRead = true;
887          if (mVideoTrack.mSource != NULL) {
888              mVideoTrack.mPackets->clear();
889          }
890          sp<AMessage> response = new AMessage;
891          uint32_t replyID;
892          CHECK(msg->senderAwaitsResponse(&replyID));
893          response->postReply(replyID);
894          break;
895      }
896      default:
897          Source::onMessageReceived(msg);
898          break;
899    }
900}
901
902void NuPlayer::GenericSource::fetchTextData(
903        uint32_t sendWhat,
904        media_track_type type,
905        int32_t curGen,
906        sp<AnotherPacketSource> packets,
907        sp<AMessage> msg) {
908    int32_t msgGeneration;
909    CHECK(msg->findInt32("generation", &msgGeneration));
910    if (msgGeneration != curGen) {
911        // stale
912        return;
913    }
914
915    int32_t avail;
916    if (packets->hasBufferAvailable(&avail)) {
917        return;
918    }
919
920    int64_t timeUs;
921    CHECK(msg->findInt64("timeUs", &timeUs));
922
923    int64_t subTimeUs;
924    readBuffer(type, timeUs, &subTimeUs);
925
926    int64_t delayUs = subTimeUs - timeUs;
927    if (msg->what() == kWhatFetchSubtitleData) {
928        const int64_t oneSecUs = 1000000ll;
929        delayUs -= oneSecUs;
930    }
931    sp<AMessage> msg2 = new AMessage(sendWhat, id());
932    msg2->setInt32("generation", msgGeneration);
933    msg2->post(delayUs < 0 ? 0 : delayUs);
934}
935
936void NuPlayer::GenericSource::sendTextData(
937        uint32_t what,
938        media_track_type type,
939        int32_t curGen,
940        sp<AnotherPacketSource> packets,
941        sp<AMessage> msg) {
942    int32_t msgGeneration;
943    CHECK(msg->findInt32("generation", &msgGeneration));
944    if (msgGeneration != curGen) {
945        // stale
946        return;
947    }
948
949    int64_t subTimeUs;
950    if (packets->nextBufferTime(&subTimeUs) != OK) {
951        return;
952    }
953
954    int64_t nextSubTimeUs;
955    readBuffer(type, -1, &nextSubTimeUs);
956
957    sp<ABuffer> buffer;
958    status_t dequeueStatus = packets->dequeueAccessUnit(&buffer);
959    if (dequeueStatus == OK) {
960        sp<AMessage> notify = dupNotify();
961        notify->setInt32("what", what);
962        notify->setBuffer("buffer", buffer);
963        notify->post();
964
965        const int64_t delayUs = nextSubTimeUs - subTimeUs;
966        msg->post(delayUs < 0 ? 0 : delayUs);
967    }
968}
969
970sp<MetaData> NuPlayer::GenericSource::getFormatMeta(bool audio) {
971    sp<AMessage> msg = new AMessage(kWhatGetFormat, id());
972    msg->setInt32("audio", audio);
973
974    sp<AMessage> response;
975    void *format;
976    status_t err = msg->postAndAwaitResponse(&response);
977    if (err == OK && response != NULL) {
978        CHECK(response->findPointer("format", &format));
979        return (MetaData *)format;
980    } else {
981        return NULL;
982    }
983}
984
985void NuPlayer::GenericSource::onGetFormatMeta(sp<AMessage> msg) const {
986    int32_t audio;
987    CHECK(msg->findInt32("audio", &audio));
988
989    sp<AMessage> response = new AMessage;
990    sp<MetaData> format = doGetFormatMeta(audio);
991    response->setPointer("format", format.get());
992
993    uint32_t replyID;
994    CHECK(msg->senderAwaitsResponse(&replyID));
995    response->postReply(replyID);
996}
997
998sp<MetaData> NuPlayer::GenericSource::doGetFormatMeta(bool audio) const {
999    sp<MediaSource> source = audio ? mAudioTrack.mSource : mVideoTrack.mSource;
1000
1001    if (source == NULL) {
1002        return NULL;
1003    }
1004
1005    return source->getFormat();
1006}
1007
1008status_t NuPlayer::GenericSource::dequeueAccessUnit(
1009        bool audio, sp<ABuffer> *accessUnit) {
1010    Track *track = audio ? &mAudioTrack : &mVideoTrack;
1011
1012    if (track->mSource == NULL) {
1013        return -EWOULDBLOCK;
1014    }
1015
1016    if (mIsWidevine && !audio) {
1017        // try to read a buffer as we may not have been able to the last time
1018        postReadBuffer(MEDIA_TRACK_TYPE_VIDEO);
1019    }
1020
1021    status_t finalResult;
1022    if (!track->mPackets->hasBufferAvailable(&finalResult)) {
1023        if (finalResult == OK) {
1024            postReadBuffer(
1025                    audio ? MEDIA_TRACK_TYPE_AUDIO : MEDIA_TRACK_TYPE_VIDEO);
1026            return -EWOULDBLOCK;
1027        }
1028        return finalResult;
1029    }
1030
1031    status_t result = track->mPackets->dequeueAccessUnit(accessUnit);
1032
1033    if (!track->mPackets->hasBufferAvailable(&finalResult)) {
1034        postReadBuffer(audio? MEDIA_TRACK_TYPE_AUDIO : MEDIA_TRACK_TYPE_VIDEO);
1035    }
1036
1037    if (result != OK) {
1038        if (mSubtitleTrack.mSource != NULL) {
1039            mSubtitleTrack.mPackets->clear();
1040            mFetchSubtitleDataGeneration++;
1041        }
1042        if (mTimedTextTrack.mSource != NULL) {
1043            mTimedTextTrack.mPackets->clear();
1044            mFetchTimedTextDataGeneration++;
1045        }
1046        return result;
1047    }
1048
1049    int64_t timeUs;
1050    status_t eosResult; // ignored
1051    CHECK((*accessUnit)->meta()->findInt64("timeUs", &timeUs));
1052    if (audio) {
1053        mAudioLastDequeueTimeUs = timeUs;
1054    } else {
1055        mVideoLastDequeueTimeUs = timeUs;
1056    }
1057
1058    if (mSubtitleTrack.mSource != NULL
1059            && !mSubtitleTrack.mPackets->hasBufferAvailable(&eosResult)) {
1060        sp<AMessage> msg = new AMessage(kWhatFetchSubtitleData, id());
1061        msg->setInt64("timeUs", timeUs);
1062        msg->setInt32("generation", mFetchSubtitleDataGeneration);
1063        msg->post();
1064    }
1065
1066    if (mTimedTextTrack.mSource != NULL
1067            && !mTimedTextTrack.mPackets->hasBufferAvailable(&eosResult)) {
1068        sp<AMessage> msg = new AMessage(kWhatFetchTimedTextData, id());
1069        msg->setInt64("timeUs", timeUs);
1070        msg->setInt32("generation", mFetchTimedTextDataGeneration);
1071        msg->post();
1072    }
1073
1074    return result;
1075}
1076
1077status_t NuPlayer::GenericSource::getDuration(int64_t *durationUs) {
1078    *durationUs = mDurationUs;
1079    return OK;
1080}
1081
1082size_t NuPlayer::GenericSource::getTrackCount() const {
1083    return mSources.size();
1084}
1085
1086sp<AMessage> NuPlayer::GenericSource::getTrackInfo(size_t trackIndex) const {
1087    size_t trackCount = mSources.size();
1088    if (trackIndex >= trackCount) {
1089        return NULL;
1090    }
1091
1092    sp<AMessage> format = new AMessage();
1093    sp<MetaData> meta = mSources.itemAt(trackIndex)->getFormat();
1094
1095    const char *mime;
1096    CHECK(meta->findCString(kKeyMIMEType, &mime));
1097
1098    int32_t trackType;
1099    if (!strncasecmp(mime, "video/", 6)) {
1100        trackType = MEDIA_TRACK_TYPE_VIDEO;
1101    } else if (!strncasecmp(mime, "audio/", 6)) {
1102        trackType = MEDIA_TRACK_TYPE_AUDIO;
1103    } else if (!strcasecmp(mime, MEDIA_MIMETYPE_TEXT_3GPP)) {
1104        trackType = MEDIA_TRACK_TYPE_TIMEDTEXT;
1105    } else {
1106        trackType = MEDIA_TRACK_TYPE_UNKNOWN;
1107    }
1108    format->setInt32("type", trackType);
1109
1110    const char *lang;
1111    if (!meta->findCString(kKeyMediaLanguage, &lang)) {
1112        lang = "und";
1113    }
1114    format->setString("language", lang);
1115
1116    if (trackType == MEDIA_TRACK_TYPE_SUBTITLE) {
1117        format->setString("mime", mime);
1118
1119        int32_t isAutoselect = 1, isDefault = 0, isForced = 0;
1120        meta->findInt32(kKeyTrackIsAutoselect, &isAutoselect);
1121        meta->findInt32(kKeyTrackIsDefault, &isDefault);
1122        meta->findInt32(kKeyTrackIsForced, &isForced);
1123
1124        format->setInt32("auto", !!isAutoselect);
1125        format->setInt32("default", !!isDefault);
1126        format->setInt32("forced", !!isForced);
1127    }
1128
1129    return format;
1130}
1131
1132ssize_t NuPlayer::GenericSource::getSelectedTrack(media_track_type type) const {
1133    sp<AMessage> msg = new AMessage(kWhatGetSelectedTrack, id());
1134    msg->setInt32("type", type);
1135
1136    sp<AMessage> response;
1137    int32_t index;
1138    status_t err = msg->postAndAwaitResponse(&response);
1139    if (err == OK && response != NULL) {
1140        CHECK(response->findInt32("index", &index));
1141        return index;
1142    } else {
1143        return -1;
1144    }
1145}
1146
1147void NuPlayer::GenericSource::onGetSelectedTrack(sp<AMessage> msg) const {
1148    int32_t tmpType;
1149    CHECK(msg->findInt32("type", &tmpType));
1150    media_track_type type = (media_track_type)tmpType;
1151
1152    sp<AMessage> response = new AMessage;
1153    ssize_t index = doGetSelectedTrack(type);
1154    response->setInt32("index", index);
1155
1156    uint32_t replyID;
1157    CHECK(msg->senderAwaitsResponse(&replyID));
1158    response->postReply(replyID);
1159}
1160
1161ssize_t NuPlayer::GenericSource::doGetSelectedTrack(media_track_type type) const {
1162    const Track *track = NULL;
1163    switch (type) {
1164    case MEDIA_TRACK_TYPE_VIDEO:
1165        track = &mVideoTrack;
1166        break;
1167    case MEDIA_TRACK_TYPE_AUDIO:
1168        track = &mAudioTrack;
1169        break;
1170    case MEDIA_TRACK_TYPE_TIMEDTEXT:
1171        track = &mTimedTextTrack;
1172        break;
1173    case MEDIA_TRACK_TYPE_SUBTITLE:
1174        track = &mSubtitleTrack;
1175        break;
1176    default:
1177        break;
1178    }
1179
1180    if (track != NULL && track->mSource != NULL) {
1181        return track->mIndex;
1182    }
1183
1184    return -1;
1185}
1186
1187status_t NuPlayer::GenericSource::selectTrack(size_t trackIndex, bool select, int64_t timeUs) {
1188    ALOGV("%s track: %zu", select ? "select" : "deselect", trackIndex);
1189    sp<AMessage> msg = new AMessage(kWhatSelectTrack, id());
1190    msg->setInt32("trackIndex", trackIndex);
1191    msg->setInt32("select", select);
1192    msg->setInt64("timeUs", timeUs);
1193
1194    sp<AMessage> response;
1195    status_t err = msg->postAndAwaitResponse(&response);
1196    if (err == OK && response != NULL) {
1197        CHECK(response->findInt32("err", &err));
1198    }
1199
1200    return err;
1201}
1202
1203void NuPlayer::GenericSource::onSelectTrack(sp<AMessage> msg) {
1204    int32_t trackIndex, select;
1205    int64_t timeUs;
1206    CHECK(msg->findInt32("trackIndex", &trackIndex));
1207    CHECK(msg->findInt32("select", &select));
1208    CHECK(msg->findInt64("timeUs", &timeUs));
1209
1210    sp<AMessage> response = new AMessage;
1211    status_t err = doSelectTrack(trackIndex, select, timeUs);
1212    response->setInt32("err", err);
1213
1214    uint32_t replyID;
1215    CHECK(msg->senderAwaitsResponse(&replyID));
1216    response->postReply(replyID);
1217}
1218
1219status_t NuPlayer::GenericSource::doSelectTrack(size_t trackIndex, bool select, int64_t timeUs) {
1220    if (trackIndex >= mSources.size()) {
1221        return BAD_INDEX;
1222    }
1223
1224    if (!select) {
1225        Track* track = NULL;
1226        if (mSubtitleTrack.mSource != NULL && trackIndex == mSubtitleTrack.mIndex) {
1227            track = &mSubtitleTrack;
1228            mFetchSubtitleDataGeneration++;
1229        } else if (mTimedTextTrack.mSource != NULL && trackIndex == mTimedTextTrack.mIndex) {
1230            track = &mTimedTextTrack;
1231            mFetchTimedTextDataGeneration++;
1232        }
1233        if (track == NULL) {
1234            return INVALID_OPERATION;
1235        }
1236        track->mSource->stop();
1237        track->mSource = NULL;
1238        track->mPackets->clear();
1239        return OK;
1240    }
1241
1242    const sp<MediaSource> source = mSources.itemAt(trackIndex);
1243    sp<MetaData> meta = source->getFormat();
1244    const char *mime;
1245    CHECK(meta->findCString(kKeyMIMEType, &mime));
1246    if (!strncasecmp(mime, "text/", 5)) {
1247        bool isSubtitle = strcasecmp(mime, MEDIA_MIMETYPE_TEXT_3GPP);
1248        Track *track = isSubtitle ? &mSubtitleTrack : &mTimedTextTrack;
1249        if (track->mSource != NULL && track->mIndex == trackIndex) {
1250            return OK;
1251        }
1252        track->mIndex = trackIndex;
1253        if (track->mSource != NULL) {
1254            track->mSource->stop();
1255        }
1256        track->mSource = mSources.itemAt(trackIndex);
1257        track->mSource->start();
1258        if (track->mPackets == NULL) {
1259            track->mPackets = new AnotherPacketSource(track->mSource->getFormat());
1260        } else {
1261            track->mPackets->clear();
1262            track->mPackets->setFormat(track->mSource->getFormat());
1263
1264        }
1265
1266        if (isSubtitle) {
1267            mFetchSubtitleDataGeneration++;
1268        } else {
1269            mFetchTimedTextDataGeneration++;
1270        }
1271
1272        status_t eosResult; // ignored
1273        if (mSubtitleTrack.mSource != NULL
1274                && !mSubtitleTrack.mPackets->hasBufferAvailable(&eosResult)) {
1275            sp<AMessage> msg = new AMessage(kWhatFetchSubtitleData, id());
1276            msg->setInt64("timeUs", timeUs);
1277            msg->setInt32("generation", mFetchSubtitleDataGeneration);
1278            msg->post();
1279        }
1280
1281        if (mTimedTextTrack.mSource != NULL
1282                && !mTimedTextTrack.mPackets->hasBufferAvailable(&eosResult)) {
1283            sp<AMessage> msg = new AMessage(kWhatFetchTimedTextData, id());
1284            msg->setInt64("timeUs", timeUs);
1285            msg->setInt32("generation", mFetchTimedTextDataGeneration);
1286            msg->post();
1287        }
1288
1289        return OK;
1290    } else if (!strncasecmp(mime, "audio/", 6) || !strncasecmp(mime, "video/", 6)) {
1291        bool audio = !strncasecmp(mime, "audio/", 6);
1292        Track *track = audio ? &mAudioTrack : &mVideoTrack;
1293        if (track->mSource != NULL && track->mIndex == trackIndex) {
1294            return OK;
1295        }
1296
1297        sp<AMessage> msg = new AMessage(kWhatChangeAVSource, id());
1298        msg->setInt32("trackIndex", trackIndex);
1299        msg->post();
1300        return OK;
1301    }
1302
1303    return INVALID_OPERATION;
1304}
1305
1306status_t NuPlayer::GenericSource::seekTo(int64_t seekTimeUs) {
1307    sp<AMessage> msg = new AMessage(kWhatSeek, id());
1308    msg->setInt64("seekTimeUs", seekTimeUs);
1309
1310    sp<AMessage> response;
1311    status_t err = msg->postAndAwaitResponse(&response);
1312    if (err == OK && response != NULL) {
1313        CHECK(response->findInt32("err", &err));
1314    }
1315
1316    return err;
1317}
1318
1319void NuPlayer::GenericSource::onSeek(sp<AMessage> msg) {
1320    int64_t seekTimeUs;
1321    CHECK(msg->findInt64("seekTimeUs", &seekTimeUs));
1322
1323    sp<AMessage> response = new AMessage;
1324    status_t err = doSeek(seekTimeUs);
1325    response->setInt32("err", err);
1326
1327    uint32_t replyID;
1328    CHECK(msg->senderAwaitsResponse(&replyID));
1329    response->postReply(replyID);
1330}
1331
1332status_t NuPlayer::GenericSource::doSeek(int64_t seekTimeUs) {
1333    // If the Widevine source is stopped, do not attempt to read any
1334    // more buffers.
1335    if (mStopRead) {
1336        return INVALID_OPERATION;
1337    }
1338    if (mVideoTrack.mSource != NULL) {
1339        int64_t actualTimeUs;
1340        readBuffer(MEDIA_TRACK_TYPE_VIDEO, seekTimeUs, &actualTimeUs);
1341
1342        seekTimeUs = actualTimeUs;
1343        mVideoLastDequeueTimeUs = seekTimeUs;
1344    }
1345
1346    if (mAudioTrack.mSource != NULL) {
1347        readBuffer(MEDIA_TRACK_TYPE_AUDIO, seekTimeUs);
1348        mAudioLastDequeueTimeUs = seekTimeUs;
1349    }
1350
1351    setDrmPlaybackStatusIfNeeded(Playback::START, seekTimeUs / 1000);
1352    if (!mStarted) {
1353        setDrmPlaybackStatusIfNeeded(Playback::PAUSE, 0);
1354    }
1355
1356    // If currently buffering, post kWhatBufferingEnd first, so that
1357    // NuPlayer resumes. Otherwise, if cache hits high watermark
1358    // before new polling happens, no one will resume the playback.
1359    stopBufferingIfNecessary();
1360    restartPollBuffering();
1361
1362    return OK;
1363}
1364
1365sp<ABuffer> NuPlayer::GenericSource::mediaBufferToABuffer(
1366        MediaBuffer* mb,
1367        media_track_type trackType,
1368        int64_t /* seekTimeUs */,
1369        int64_t *actualTimeUs) {
1370    bool audio = trackType == MEDIA_TRACK_TYPE_AUDIO;
1371    size_t outLength = mb->range_length();
1372
1373    if (audio && mAudioIsVorbis) {
1374        outLength += sizeof(int32_t);
1375    }
1376
1377    sp<ABuffer> ab;
1378    if (mIsSecure && !audio) {
1379        // data is already provided in the buffer
1380        ab = new ABuffer(NULL, mb->range_length());
1381        mb->add_ref();
1382        ab->setMediaBufferBase(mb);
1383    } else {
1384        ab = new ABuffer(outLength);
1385        memcpy(ab->data(),
1386               (const uint8_t *)mb->data() + mb->range_offset(),
1387               mb->range_length());
1388    }
1389
1390    if (audio && mAudioIsVorbis) {
1391        int32_t numPageSamples;
1392        if (!mb->meta_data()->findInt32(kKeyValidSamples, &numPageSamples)) {
1393            numPageSamples = -1;
1394        }
1395
1396        uint8_t* abEnd = ab->data() + mb->range_length();
1397        memcpy(abEnd, &numPageSamples, sizeof(numPageSamples));
1398    }
1399
1400    sp<AMessage> meta = ab->meta();
1401
1402    int64_t timeUs;
1403    CHECK(mb->meta_data()->findInt64(kKeyTime, &timeUs));
1404    meta->setInt64("timeUs", timeUs);
1405
1406#if 0
1407    // Temporarily disable pre-roll till we have a full solution to handle
1408    // both single seek and continous seek gracefully.
1409    if (seekTimeUs > timeUs) {
1410        sp<AMessage> extra = new AMessage;
1411        extra->setInt64("resume-at-mediaTimeUs", seekTimeUs);
1412        meta->setMessage("extra", extra);
1413    }
1414#endif
1415
1416    if (trackType == MEDIA_TRACK_TYPE_TIMEDTEXT) {
1417        const char *mime;
1418        CHECK(mTimedTextTrack.mSource != NULL
1419                && mTimedTextTrack.mSource->getFormat()->findCString(kKeyMIMEType, &mime));
1420        meta->setString("mime", mime);
1421    }
1422
1423    int64_t durationUs;
1424    if (mb->meta_data()->findInt64(kKeyDuration, &durationUs)) {
1425        meta->setInt64("durationUs", durationUs);
1426    }
1427
1428    if (trackType == MEDIA_TRACK_TYPE_SUBTITLE) {
1429        meta->setInt32("trackIndex", mSubtitleTrack.mIndex);
1430    }
1431
1432    if (actualTimeUs) {
1433        *actualTimeUs = timeUs;
1434    }
1435
1436    mb->release();
1437    mb = NULL;
1438
1439    return ab;
1440}
1441
1442void NuPlayer::GenericSource::postReadBuffer(media_track_type trackType) {
1443    Mutex::Autolock _l(mReadBufferLock);
1444
1445    if ((mPendingReadBufferTypes & (1 << trackType)) == 0) {
1446        mPendingReadBufferTypes |= (1 << trackType);
1447        sp<AMessage> msg = new AMessage(kWhatReadBuffer, id());
1448        msg->setInt32("trackType", trackType);
1449        msg->post();
1450    }
1451}
1452
1453void NuPlayer::GenericSource::onReadBuffer(sp<AMessage> msg) {
1454    int32_t tmpType;
1455    CHECK(msg->findInt32("trackType", &tmpType));
1456    media_track_type trackType = (media_track_type)tmpType;
1457    readBuffer(trackType);
1458    {
1459        // only protect the variable change, as readBuffer may
1460        // take considerable time.
1461        Mutex::Autolock _l(mReadBufferLock);
1462        mPendingReadBufferTypes &= ~(1 << trackType);
1463    }
1464}
1465
1466void NuPlayer::GenericSource::readBuffer(
1467        media_track_type trackType, int64_t seekTimeUs, int64_t *actualTimeUs, bool formatChange) {
1468    // Do not read data if Widevine source is stopped
1469    if (mStopRead) {
1470        return;
1471    }
1472    Track *track;
1473    size_t maxBuffers = 1;
1474    switch (trackType) {
1475        case MEDIA_TRACK_TYPE_VIDEO:
1476            track = &mVideoTrack;
1477            if (mIsWidevine) {
1478                maxBuffers = 2;
1479            }
1480            break;
1481        case MEDIA_TRACK_TYPE_AUDIO:
1482            track = &mAudioTrack;
1483            if (mIsWidevine) {
1484                maxBuffers = 8;
1485            } else {
1486                maxBuffers = 64;
1487            }
1488            break;
1489        case MEDIA_TRACK_TYPE_SUBTITLE:
1490            track = &mSubtitleTrack;
1491            break;
1492        case MEDIA_TRACK_TYPE_TIMEDTEXT:
1493            track = &mTimedTextTrack;
1494            break;
1495        default:
1496            TRESPASS();
1497    }
1498
1499    if (track->mSource == NULL) {
1500        return;
1501    }
1502
1503    if (actualTimeUs) {
1504        *actualTimeUs = seekTimeUs;
1505    }
1506
1507    MediaSource::ReadOptions options;
1508
1509    bool seeking = false;
1510
1511    if (seekTimeUs >= 0) {
1512        options.setSeekTo(seekTimeUs, MediaSource::ReadOptions::SEEK_PREVIOUS_SYNC);
1513        seeking = true;
1514    }
1515
1516    if (mIsWidevine) {
1517        options.setNonBlocking();
1518    }
1519
1520    for (size_t numBuffers = 0; numBuffers < maxBuffers; ) {
1521        MediaBuffer *mbuf;
1522        status_t err = track->mSource->read(&mbuf, &options);
1523
1524        options.clearSeekTo();
1525
1526        if (err == OK) {
1527            int64_t timeUs;
1528            CHECK(mbuf->meta_data()->findInt64(kKeyTime, &timeUs));
1529            if (trackType == MEDIA_TRACK_TYPE_AUDIO) {
1530                mAudioTimeUs = timeUs;
1531            } else if (trackType == MEDIA_TRACK_TYPE_VIDEO) {
1532                mVideoTimeUs = timeUs;
1533            }
1534
1535            // formatChange && seeking: track whose source is changed during selection
1536            // formatChange && !seeking: track whose source is not changed during selection
1537            // !formatChange: normal seek
1538            if ((seeking || formatChange)
1539                    && (trackType == MEDIA_TRACK_TYPE_AUDIO
1540                    || trackType == MEDIA_TRACK_TYPE_VIDEO)) {
1541                ATSParser::DiscontinuityType type = (formatChange && seeking)
1542                        ? ATSParser::DISCONTINUITY_FORMATCHANGE
1543                        : ATSParser::DISCONTINUITY_NONE;
1544                track->mPackets->queueDiscontinuity( type, NULL, true /* discard */);
1545            }
1546
1547            sp<ABuffer> buffer = mediaBufferToABuffer(
1548                    mbuf, trackType, seekTimeUs, actualTimeUs);
1549            track->mPackets->queueAccessUnit(buffer);
1550            formatChange = false;
1551            seeking = false;
1552            ++numBuffers;
1553        } else if (err == WOULD_BLOCK) {
1554            break;
1555        } else if (err == INFO_FORMAT_CHANGED) {
1556#if 0
1557            track->mPackets->queueDiscontinuity(
1558                    ATSParser::DISCONTINUITY_FORMATCHANGE,
1559                    NULL,
1560                    false /* discard */);
1561#endif
1562        } else {
1563            track->mPackets->signalEOS(err);
1564            break;
1565        }
1566    }
1567}
1568
1569}  // namespace android
1570