GenericSource.cpp revision b41fd0d4929f0a89811bafcc4fd944b128f00ce2 
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(-1ll),
60      mAudioIsVorbis(false),
61      mIsWidevine(false),
62      mIsSecure(false),
63      mIsStreaming(false),
64      mUIDValid(uidValid),
65      mUID(uid),
66      mFd(-1),
67      mDrmManagerClient(NULL),
68      mBitrate(-1ll),
69      mPollBufferingGeneration(0),
70      mPendingReadBufferTypes(0),
71      mBuffering(false),
72      mPrepareBuffering(false),
73      mPrevBufferPercentage(-1) {
74    resetDataSource();
75    DataSource::RegisterDefaultSniffers();
76}
77
78void NuPlayer::GenericSource::resetDataSource() {
79    mHTTPService.clear();
80    mHttpSource.clear();
81    mUri.clear();
82    mUriHeaders.clear();
83    if (mFd >= 0) {
84        close(mFd);
85        mFd = -1;
86    }
87    mOffset = 0;
88    mLength = 0;
89    setDrmPlaybackStatusIfNeeded(Playback::STOP, 0);
90    mDecryptHandle = NULL;
91    mDrmManagerClient = NULL;
92    mStarted = false;
93    mStopRead = true;
94}
95
96status_t NuPlayer::GenericSource::setDataSource(
97        const sp<IMediaHTTPService> &httpService,
98        const char *url,
99        const KeyedVector<String8, String8> *headers) {
100    resetDataSource();
101
102    mHTTPService = httpService;
103    mUri = url;
104
105    if (headers) {
106        mUriHeaders = *headers;
107    }
108
109    // delay data source creation to prepareAsync() to avoid blocking
110    // the calling thread in setDataSource for any significant time.
111    return OK;
112}
113
114status_t NuPlayer::GenericSource::setDataSource(
115        int fd, int64_t offset, int64_t length) {
116    resetDataSource();
117
118    mFd = dup(fd);
119    mOffset = offset;
120    mLength = length;
121
122    // delay data source creation to prepareAsync() to avoid blocking
123    // the calling thread in setDataSource for any significant time.
124    return OK;
125}
126
127status_t NuPlayer::GenericSource::setDataSource(const sp<DataSource>& source) {
128    resetDataSource();
129    mDataSource = source;
130    return OK;
131}
132
133sp<MetaData> NuPlayer::GenericSource::getFileFormatMeta() const {
134    return mFileMeta;
135}
136
137status_t NuPlayer::GenericSource::initFromDataSource() {
138    sp<MediaExtractor> extractor;
139    String8 mimeType;
140    float confidence;
141    sp<AMessage> dummy;
142    bool isWidevineStreaming = false;
143
144    CHECK(mDataSource != NULL);
145
146    if (mIsWidevine) {
147        isWidevineStreaming = SniffWVM(
148                mDataSource, &mimeType, &confidence, &dummy);
149        if (!isWidevineStreaming ||
150                strcasecmp(
151                    mimeType.string(), MEDIA_MIMETYPE_CONTAINER_WVM)) {
152            ALOGE("unsupported widevine mime: %s", mimeType.string());
153            return UNKNOWN_ERROR;
154        }
155    } else if (mIsStreaming) {
156        if (!mDataSource->sniff(&mimeType, &confidence, &dummy)) {
157            return UNKNOWN_ERROR;
158        }
159        isWidevineStreaming = !strcasecmp(
160                mimeType.string(), MEDIA_MIMETYPE_CONTAINER_WVM);
161    }
162
163    if (isWidevineStreaming) {
164        // we don't want cached source for widevine streaming.
165        mCachedSource.clear();
166        mDataSource = mHttpSource;
167        mWVMExtractor = new WVMExtractor(mDataSource);
168        mWVMExtractor->setAdaptiveStreamingMode(true);
169        if (mUIDValid) {
170            mWVMExtractor->setUID(mUID);
171        }
172        extractor = mWVMExtractor;
173    } else {
174        extractor = MediaExtractor::Create(mDataSource,
175                mimeType.isEmpty() ? NULL : mimeType.string());
176    }
177
178    if (extractor == NULL) {
179        return UNKNOWN_ERROR;
180    }
181
182    if (extractor->getDrmFlag()) {
183        checkDrmStatus(mDataSource);
184    }
185
186    mFileMeta = extractor->getMetaData();
187    if (mFileMeta != NULL) {
188        int64_t duration;
189        if (mFileMeta->findInt64(kKeyDuration, &duration)) {
190            mDurationUs = duration;
191        }
192
193        if (!mIsWidevine) {
194            // Check mime to see if we actually have a widevine source.
195            // If the data source is not URL-type (eg. file source), we
196            // won't be able to tell until now.
197            const char *fileMime;
198            if (mFileMeta->findCString(kKeyMIMEType, &fileMime)
199                    && !strncasecmp(fileMime, "video/wvm", 9)) {
200                mIsWidevine = true;
201            }
202        }
203    }
204
205    int32_t totalBitrate = 0;
206
207    size_t numtracks = extractor->countTracks();
208    if (numtracks == 0) {
209        return UNKNOWN_ERROR;
210    }
211
212    for (size_t i = 0; i < numtracks; ++i) {
213        sp<MediaSource> track = extractor->getTrack(i);
214
215        sp<MetaData> meta = extractor->getTrackMetaData(i);
216
217        const char *mime;
218        CHECK(meta->findCString(kKeyMIMEType, &mime));
219
220        // Do the string compare immediately with "mime",
221        // we can't assume "mime" would stay valid after another
222        // extractor operation, some extractors might modify meta
223        // during getTrack() and make it invalid.
224        if (!strncasecmp(mime, "audio/", 6)) {
225            if (mAudioTrack.mSource == NULL) {
226                mAudioTrack.mIndex = i;
227                mAudioTrack.mSource = track;
228                mAudioTrack.mPackets =
229                    new AnotherPacketSource(mAudioTrack.mSource->getFormat());
230
231                if (!strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_VORBIS)) {
232                    mAudioIsVorbis = true;
233                } else {
234                    mAudioIsVorbis = false;
235                }
236            }
237        } else if (!strncasecmp(mime, "video/", 6)) {
238            if (mVideoTrack.mSource == NULL) {
239                mVideoTrack.mIndex = i;
240                mVideoTrack.mSource = track;
241                mVideoTrack.mPackets =
242                    new AnotherPacketSource(mVideoTrack.mSource->getFormat());
243
244                // check if the source requires secure buffers
245                int32_t secure;
246                if (meta->findInt32(kKeyRequiresSecureBuffers, &secure)
247                        && secure) {
248                    mIsSecure = true;
249                    if (mUIDValid) {
250                        extractor->setUID(mUID);
251                    }
252                }
253            }
254        }
255
256        if (track != NULL) {
257            mSources.push(track);
258            int64_t durationUs;
259            if (meta->findInt64(kKeyDuration, &durationUs)) {
260                if (durationUs > mDurationUs) {
261                    mDurationUs = durationUs;
262                }
263            }
264
265            int32_t bitrate;
266            if (totalBitrate >= 0 && meta->findInt32(kKeyBitRate, &bitrate)) {
267                totalBitrate += bitrate;
268            } else {
269                totalBitrate = -1;
270            }
271        }
272    }
273
274    mBitrate = totalBitrate;
275
276    return OK;
277}
278
279status_t NuPlayer::GenericSource::startSources() {
280    // Start the selected A/V tracks now before we start buffering.
281    // Widevine sources might re-initialize crypto when starting, if we delay
282    // this to start(), all data buffered during prepare would be wasted.
283    // (We don't actually start reading until start().)
284    if (mAudioTrack.mSource != NULL && mAudioTrack.mSource->start() != OK) {
285        ALOGE("failed to start audio track!");
286        return UNKNOWN_ERROR;
287    }
288
289    if (mVideoTrack.mSource != NULL && mVideoTrack.mSource->start() != OK) {
290        ALOGE("failed to start video track!");
291        return UNKNOWN_ERROR;
292    }
293
294    return OK;
295}
296
297void NuPlayer::GenericSource::checkDrmStatus(const sp<DataSource>& dataSource) {
298    dataSource->getDrmInfo(mDecryptHandle, &mDrmManagerClient);
299    if (mDecryptHandle != NULL) {
300        CHECK(mDrmManagerClient);
301        if (RightsStatus::RIGHTS_VALID != mDecryptHandle->status) {
302            sp<AMessage> msg = dupNotify();
303            msg->setInt32("what", kWhatDrmNoLicense);
304            msg->post();
305        }
306    }
307}
308
309int64_t NuPlayer::GenericSource::getLastReadPosition() {
310    if (mAudioTrack.mSource != NULL) {
311        return mAudioTimeUs;
312    } else if (mVideoTrack.mSource != NULL) {
313        return mVideoTimeUs;
314    } else {
315        return 0;
316    }
317}
318
319status_t NuPlayer::GenericSource::setBuffers(
320        bool audio, Vector<MediaBuffer *> &buffers) {
321    if (mIsSecure && !audio) {
322        return mVideoTrack.mSource->setBuffers(buffers);
323    }
324    return INVALID_OPERATION;
325}
326
327bool NuPlayer::GenericSource::isStreaming() const {
328    return mIsStreaming;
329}
330
331NuPlayer::GenericSource::~GenericSource() {
332    if (mLooper != NULL) {
333        mLooper->unregisterHandler(id());
334        mLooper->stop();
335    }
336    resetDataSource();
337}
338
339void NuPlayer::GenericSource::prepareAsync() {
340    if (mLooper == NULL) {
341        mLooper = new ALooper;
342        mLooper->setName("generic");
343        mLooper->start();
344
345        mLooper->registerHandler(this);
346    }
347
348    sp<AMessage> msg = new AMessage(kWhatPrepareAsync, this);
349    msg->post();
350}
351
352void NuPlayer::GenericSource::onPrepareAsync() {
353    // delayed data source creation
354    if (mDataSource == NULL) {
355        // set to false first, if the extractor
356        // comes back as secure, set it to true then.
357        mIsSecure = false;
358
359        if (!mUri.empty()) {
360            const char* uri = mUri.c_str();
361            String8 contentType;
362            mIsWidevine = !strncasecmp(uri, "widevine://", 11);
363
364            if (!strncasecmp("http://", uri, 7)
365                    || !strncasecmp("https://", uri, 8)
366                    || mIsWidevine) {
367                mHttpSource = DataSource::CreateMediaHTTP(mHTTPService);
368                if (mHttpSource == NULL) {
369                    ALOGE("Failed to create http source!");
370                    notifyPreparedAndCleanup(UNKNOWN_ERROR);
371                    return;
372                }
373            }
374
375            mDataSource = DataSource::CreateFromURI(
376                   mHTTPService, uri, &mUriHeaders, &contentType,
377                   static_cast<HTTPBase *>(mHttpSource.get()));
378        } else {
379            mIsWidevine = false;
380
381            mDataSource = new FileSource(mFd, mOffset, mLength);
382            mFd = -1;
383        }
384
385        if (mDataSource == NULL) {
386            ALOGE("Failed to create data source!");
387            notifyPreparedAndCleanup(UNKNOWN_ERROR);
388            return;
389        }
390    }
391
392    if (mDataSource->flags() & DataSource::kIsCachingDataSource) {
393        mCachedSource = static_cast<NuCachedSource2 *>(mDataSource.get());
394    }
395
396    // For widevine or other cached streaming cases, we need to wait for
397    // enough buffering before reporting prepared.
398    // Note that even when URL doesn't start with widevine://, mIsWidevine
399    // could still be set to true later, if the streaming or file source
400    // is sniffed to be widevine. We don't want to buffer for file source
401    // in that case, so must check the flag now.
402    mIsStreaming = (mIsWidevine || mCachedSource != NULL);
403
404    // init extractor from data source
405    status_t 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 (mIsSecure) {
433        // secure decoders must be instantiated before starting widevine source
434        sp<AMessage> reply = new AMessage(kWhatSecureDecodersInstantiated, this);
435        notifyInstantiateSecureDecoders(reply);
436    } else {
437        finishPrepareAsync();
438    }
439}
440
441void NuPlayer::GenericSource::onSecureDecodersInstantiated(status_t err) {
442    if (err != OK) {
443        ALOGE("Failed to instantiate secure decoders!");
444        notifyPreparedAndCleanup(err);
445        return;
446    }
447    finishPrepareAsync();
448}
449
450void NuPlayer::GenericSource::finishPrepareAsync() {
451    status_t err = startSources();
452    if (err != OK) {
453        ALOGE("Failed to init start data source!");
454        notifyPreparedAndCleanup(err);
455        return;
456    }
457
458    if (mIsStreaming) {
459        mPrepareBuffering = true;
460
461        ensureCacheIsFetching();
462        restartPollBuffering();
463    } else {
464        notifyPrepared();
465    }
466}
467
468void NuPlayer::GenericSource::notifyPreparedAndCleanup(status_t err) {
469    if (err != OK) {
470        {
471            sp<DataSource> dataSource = mDataSource;
472            sp<NuCachedSource2> cachedSource = mCachedSource;
473            sp<DataSource> httpSource = mHttpSource;
474            {
475                Mutex::Autolock _l(mDisconnectLock);
476                mDataSource.clear();
477                mDrmManagerClient = NULL;
478                mCachedSource.clear();
479                mHttpSource.clear();
480            }
481        }
482        mBitrate = -1;
483
484        cancelPollBuffering();
485    }
486    notifyPrepared(err);
487}
488
489void NuPlayer::GenericSource::start() {
490    ALOGI("start");
491
492    mStopRead = false;
493    if (mAudioTrack.mSource != NULL) {
494        postReadBuffer(MEDIA_TRACK_TYPE_AUDIO);
495    }
496
497    if (mVideoTrack.mSource != NULL) {
498        postReadBuffer(MEDIA_TRACK_TYPE_VIDEO);
499    }
500
501    setDrmPlaybackStatusIfNeeded(Playback::START, getLastReadPosition() / 1000);
502    mStarted = true;
503
504    (new AMessage(kWhatStart, this))->post();
505}
506
507void NuPlayer::GenericSource::stop() {
508    // nothing to do, just account for DRM playback status
509    setDrmPlaybackStatusIfNeeded(Playback::STOP, 0);
510    mStarted = false;
511    if (mIsWidevine || mIsSecure) {
512        // For widevine or secure sources we need to prevent any further reads.
513        sp<AMessage> msg = new AMessage(kWhatStopWidevine, this);
514        sp<AMessage> response;
515        (void) msg->postAndAwaitResponse(&response);
516    }
517}
518
519void NuPlayer::GenericSource::pause() {
520    // nothing to do, just account for DRM playback status
521    setDrmPlaybackStatusIfNeeded(Playback::PAUSE, 0);
522    mStarted = false;
523}
524
525void NuPlayer::GenericSource::resume() {
526    // nothing to do, just account for DRM playback status
527    setDrmPlaybackStatusIfNeeded(Playback::START, getLastReadPosition() / 1000);
528    mStarted = true;
529
530    (new AMessage(kWhatResume, this))->post();
531}
532
533void NuPlayer::GenericSource::disconnect() {
534    sp<DataSource> dataSource, httpSource;
535    {
536        Mutex::Autolock _l(mDisconnectLock);
537        dataSource = mDataSource;
538        httpSource = mHttpSource;
539    }
540
541    if (dataSource != NULL) {
542        // disconnect data source
543        if (dataSource->flags() & DataSource::kIsCachingDataSource) {
544            static_cast<NuCachedSource2 *>(dataSource.get())->disconnect();
545        }
546    } else if (httpSource != NULL) {
547        static_cast<HTTPBase *>(httpSource.get())->disconnect();
548    }
549}
550
551void NuPlayer::GenericSource::setDrmPlaybackStatusIfNeeded(int playbackStatus, int64_t position) {
552    if (mDecryptHandle != NULL) {
553        mDrmManagerClient->setPlaybackStatus(mDecryptHandle, playbackStatus, position);
554    }
555    mSubtitleTrack.mPackets = new AnotherPacketSource(NULL);
556    mTimedTextTrack.mPackets = new AnotherPacketSource(NULL);
557}
558
559status_t NuPlayer::GenericSource::feedMoreTSData() {
560    return OK;
561}
562
563void NuPlayer::GenericSource::schedulePollBuffering() {
564    sp<AMessage> msg = new AMessage(kWhatPollBuffering, this);
565    msg->setInt32("generation", mPollBufferingGeneration);
566    msg->post(1000000ll);
567}
568
569void NuPlayer::GenericSource::cancelPollBuffering() {
570    mBuffering = false;
571    ++mPollBufferingGeneration;
572    mPrevBufferPercentage = -1;
573}
574
575void NuPlayer::GenericSource::restartPollBuffering() {
576    if (mIsStreaming) {
577        cancelPollBuffering();
578        onPollBuffering();
579    }
580}
581
582void NuPlayer::GenericSource::notifyBufferingUpdate(int32_t percentage) {
583    // Buffering percent could go backward as it's estimated from remaining
584    // data and last access time. This could cause the buffering position
585    // drawn on media control to jitter slightly. Remember previously reported
586    // percentage and don't allow it to go backward.
587    if (percentage < mPrevBufferPercentage) {
588        percentage = mPrevBufferPercentage;
589    } else if (percentage > 100) {
590        percentage = 100;
591    }
592
593    mPrevBufferPercentage = percentage;
594
595    ALOGV("notifyBufferingUpdate: buffering %d%%", percentage);
596
597    sp<AMessage> msg = dupNotify();
598    msg->setInt32("what", kWhatBufferingUpdate);
599    msg->setInt32("percentage", percentage);
600    msg->post();
601}
602
603void NuPlayer::GenericSource::startBufferingIfNecessary() {
604    ALOGV("startBufferingIfNecessary: mPrepareBuffering=%d, mBuffering=%d",
605            mPrepareBuffering, mBuffering);
606
607    if (mPrepareBuffering) {
608        return;
609    }
610
611    if (!mBuffering) {
612        mBuffering = true;
613
614        ensureCacheIsFetching();
615        sendCacheStats();
616
617        sp<AMessage> notify = dupNotify();
618        notify->setInt32("what", kWhatPauseOnBufferingStart);
619        notify->post();
620    }
621}
622
623void NuPlayer::GenericSource::stopBufferingIfNecessary() {
624    ALOGV("stopBufferingIfNecessary: mPrepareBuffering=%d, mBuffering=%d",
625            mPrepareBuffering, mBuffering);
626
627    if (mPrepareBuffering) {
628        mPrepareBuffering = false;
629        notifyPrepared();
630        return;
631    }
632
633    if (mBuffering) {
634        mBuffering = false;
635
636        sendCacheStats();
637
638        sp<AMessage> notify = dupNotify();
639        notify->setInt32("what", kWhatResumeOnBufferingEnd);
640        notify->post();
641    }
642}
643
644void NuPlayer::GenericSource::sendCacheStats() {
645    int32_t kbps = 0;
646    status_t err = UNKNOWN_ERROR;
647
648    if (mWVMExtractor != NULL) {
649        err = mWVMExtractor->getEstimatedBandwidthKbps(&kbps);
650    } else if (mCachedSource != NULL) {
651        err = mCachedSource->getEstimatedBandwidthKbps(&kbps);
652    }
653
654    if (err == OK) {
655        sp<AMessage> notify = dupNotify();
656        notify->setInt32("what", kWhatCacheStats);
657        notify->setInt32("bandwidth", kbps);
658        notify->post();
659    }
660}
661
662void NuPlayer::GenericSource::ensureCacheIsFetching() {
663    if (mCachedSource != NULL) {
664        mCachedSource->resumeFetchingIfNecessary();
665    }
666}
667
668void NuPlayer::GenericSource::onPollBuffering() {
669    status_t finalStatus = UNKNOWN_ERROR;
670    int64_t cachedDurationUs = -1ll;
671    ssize_t cachedDataRemaining = -1;
672
673    ALOGW_IF(mWVMExtractor != NULL && mCachedSource != NULL,
674            "WVMExtractor and NuCachedSource both present");
675
676    if (mWVMExtractor != NULL) {
677        cachedDurationUs =
678                mWVMExtractor->getCachedDurationUs(&finalStatus);
679    } else if (mCachedSource != NULL) {
680        cachedDataRemaining =
681                mCachedSource->approxDataRemaining(&finalStatus);
682
683        if (finalStatus == OK) {
684            off64_t size;
685            int64_t bitrate = 0ll;
686            if (mDurationUs > 0 && mCachedSource->getSize(&size) == OK) {
687                bitrate = size * 8000000ll / mDurationUs;
688            } else if (mBitrate > 0) {
689                bitrate = mBitrate;
690            }
691            if (bitrate > 0) {
692                cachedDurationUs = cachedDataRemaining * 8000000ll / bitrate;
693            }
694        }
695    }
696
697    if (finalStatus != OK) {
698        ALOGV("onPollBuffering: EOS (finalStatus = %d)", finalStatus);
699
700        if (finalStatus == ERROR_END_OF_STREAM) {
701            notifyBufferingUpdate(100);
702        }
703
704        stopBufferingIfNecessary();
705        return;
706    } else if (cachedDurationUs >= 0ll) {
707        if (mDurationUs > 0ll) {
708            int64_t cachedPosUs = getLastReadPosition() + cachedDurationUs;
709            int percentage = 100.0 * cachedPosUs / mDurationUs;
710            if (percentage > 100) {
711                percentage = 100;
712            }
713
714            notifyBufferingUpdate(percentage);
715        }
716
717        ALOGV("onPollBuffering: cachedDurationUs %.1f sec",
718                cachedDurationUs / 1000000.0f);
719
720        if (cachedDurationUs < kLowWaterMarkUs) {
721            startBufferingIfNecessary();
722        } else if (cachedDurationUs > kHighWaterMarkUs) {
723            stopBufferingIfNecessary();
724        }
725    } else if (cachedDataRemaining >= 0) {
726        ALOGV("onPollBuffering: cachedDataRemaining %zd bytes",
727                cachedDataRemaining);
728
729        if (cachedDataRemaining < kLowWaterMarkBytes) {
730            startBufferingIfNecessary();
731        } else if (cachedDataRemaining > kHighWaterMarkBytes) {
732            stopBufferingIfNecessary();
733        }
734    }
735
736    schedulePollBuffering();
737}
738
739void NuPlayer::GenericSource::onMessageReceived(const sp<AMessage> &msg) {
740    switch (msg->what()) {
741      case kWhatPrepareAsync:
742      {
743          onPrepareAsync();
744          break;
745      }
746      case kWhatFetchSubtitleData:
747      {
748          fetchTextData(kWhatSendSubtitleData, MEDIA_TRACK_TYPE_SUBTITLE,
749                  mFetchSubtitleDataGeneration, mSubtitleTrack.mPackets, msg);
750          break;
751      }
752
753      case kWhatFetchTimedTextData:
754      {
755          fetchTextData(kWhatSendTimedTextData, MEDIA_TRACK_TYPE_TIMEDTEXT,
756                  mFetchTimedTextDataGeneration, mTimedTextTrack.mPackets, msg);
757          break;
758      }
759
760      case kWhatSendSubtitleData:
761      {
762          sendTextData(kWhatSubtitleData, MEDIA_TRACK_TYPE_SUBTITLE,
763                  mFetchSubtitleDataGeneration, mSubtitleTrack.mPackets, msg);
764          break;
765      }
766
767      case kWhatSendTimedTextData:
768      {
769          sendTextData(kWhatTimedTextData, MEDIA_TRACK_TYPE_TIMEDTEXT,
770                  mFetchTimedTextDataGeneration, mTimedTextTrack.mPackets, msg);
771          break;
772      }
773
774      case kWhatChangeAVSource:
775      {
776          int32_t trackIndex;
777          CHECK(msg->findInt32("trackIndex", &trackIndex));
778          const sp<MediaSource> source = mSources.itemAt(trackIndex);
779
780          Track* track;
781          const char *mime;
782          media_track_type trackType, counterpartType;
783          sp<MetaData> meta = source->getFormat();
784          meta->findCString(kKeyMIMEType, &mime);
785          if (!strncasecmp(mime, "audio/", 6)) {
786              track = &mAudioTrack;
787              trackType = MEDIA_TRACK_TYPE_AUDIO;
788              counterpartType = MEDIA_TRACK_TYPE_VIDEO;;
789          } else {
790              CHECK(!strncasecmp(mime, "video/", 6));
791              track = &mVideoTrack;
792              trackType = MEDIA_TRACK_TYPE_VIDEO;
793              counterpartType = MEDIA_TRACK_TYPE_AUDIO;;
794          }
795
796
797          if (track->mSource != NULL) {
798              track->mSource->stop();
799          }
800          track->mSource = source;
801          track->mSource->start();
802          track->mIndex = trackIndex;
803
804          int64_t timeUs, actualTimeUs;
805          const bool formatChange = true;
806          if (trackType == MEDIA_TRACK_TYPE_AUDIO) {
807              timeUs = mAudioLastDequeueTimeUs;
808          } else {
809              timeUs = mVideoLastDequeueTimeUs;
810          }
811          readBuffer(trackType, timeUs, &actualTimeUs, formatChange);
812          readBuffer(counterpartType, -1, NULL, formatChange);
813          ALOGV("timeUs %lld actualTimeUs %lld", (long long)timeUs, (long long)actualTimeUs);
814
815          break;
816      }
817
818      case kWhatStart:
819      case kWhatResume:
820      {
821          restartPollBuffering();
822          break;
823      }
824
825      case kWhatPollBuffering:
826      {
827          int32_t generation;
828          CHECK(msg->findInt32("generation", &generation));
829          if (generation == mPollBufferingGeneration) {
830              onPollBuffering();
831          }
832          break;
833      }
834
835      case kWhatGetFormat:
836      {
837          onGetFormatMeta(msg);
838          break;
839      }
840
841      case kWhatGetSelectedTrack:
842      {
843          onGetSelectedTrack(msg);
844          break;
845      }
846
847      case kWhatSelectTrack:
848      {
849          onSelectTrack(msg);
850          break;
851      }
852
853      case kWhatSeek:
854      {
855          onSeek(msg);
856          break;
857      }
858
859      case kWhatReadBuffer:
860      {
861          onReadBuffer(msg);
862          break;
863      }
864
865      case kWhatSecureDecodersInstantiated:
866      {
867          int32_t err;
868          CHECK(msg->findInt32("err", &err));
869          onSecureDecodersInstantiated(err);
870          break;
871      }
872
873      case kWhatStopWidevine:
874      {
875          // mStopRead is only used for Widevine to prevent the video source
876          // from being read while the associated video decoder is shutting down.
877          mStopRead = true;
878          if (mVideoTrack.mSource != NULL) {
879              mVideoTrack.mPackets->clear();
880          }
881          sp<AMessage> response = new AMessage;
882          sp<AReplyToken> replyID;
883          CHECK(msg->senderAwaitsResponse(&replyID));
884          response->postReply(replyID);
885          break;
886      }
887      default:
888          Source::onMessageReceived(msg);
889          break;
890    }
891}
892
893void NuPlayer::GenericSource::fetchTextData(
894        uint32_t sendWhat,
895        media_track_type type,
896        int32_t curGen,
897        sp<AnotherPacketSource> packets,
898        sp<AMessage> msg) {
899    int32_t msgGeneration;
900    CHECK(msg->findInt32("generation", &msgGeneration));
901    if (msgGeneration != curGen) {
902        // stale
903        return;
904    }
905
906    int32_t avail;
907    if (packets->hasBufferAvailable(&avail)) {
908        return;
909    }
910
911    int64_t timeUs;
912    CHECK(msg->findInt64("timeUs", &timeUs));
913
914    int64_t subTimeUs;
915    readBuffer(type, timeUs, &subTimeUs);
916
917    int64_t delayUs = subTimeUs - timeUs;
918    if (msg->what() == kWhatFetchSubtitleData) {
919        const int64_t oneSecUs = 1000000ll;
920        delayUs -= oneSecUs;
921    }
922    sp<AMessage> msg2 = new AMessage(sendWhat, this);
923    msg2->setInt32("generation", msgGeneration);
924    msg2->post(delayUs < 0 ? 0 : delayUs);
925}
926
927void NuPlayer::GenericSource::sendTextData(
928        uint32_t what,
929        media_track_type type,
930        int32_t curGen,
931        sp<AnotherPacketSource> packets,
932        sp<AMessage> msg) {
933    int32_t msgGeneration;
934    CHECK(msg->findInt32("generation", &msgGeneration));
935    if (msgGeneration != curGen) {
936        // stale
937        return;
938    }
939
940    int64_t subTimeUs;
941    if (packets->nextBufferTime(&subTimeUs) != OK) {
942        return;
943    }
944
945    int64_t nextSubTimeUs;
946    readBuffer(type, -1, &nextSubTimeUs);
947
948    sp<ABuffer> buffer;
949    status_t dequeueStatus = packets->dequeueAccessUnit(&buffer);
950    if (dequeueStatus == OK) {
951        sp<AMessage> notify = dupNotify();
952        notify->setInt32("what", what);
953        notify->setBuffer("buffer", buffer);
954        notify->post();
955
956        const int64_t delayUs = nextSubTimeUs - subTimeUs;
957        msg->post(delayUs < 0 ? 0 : delayUs);
958    }
959}
960
961sp<MetaData> NuPlayer::GenericSource::getFormatMeta(bool audio) {
962    sp<AMessage> msg = new AMessage(kWhatGetFormat, this);
963    msg->setInt32("audio", audio);
964
965    sp<AMessage> response;
966    void *format;
967    status_t err = msg->postAndAwaitResponse(&response);
968    if (err == OK && response != NULL) {
969        CHECK(response->findPointer("format", &format));
970        return (MetaData *)format;
971    } else {
972        return NULL;
973    }
974}
975
976void NuPlayer::GenericSource::onGetFormatMeta(sp<AMessage> msg) const {
977    int32_t audio;
978    CHECK(msg->findInt32("audio", &audio));
979
980    sp<AMessage> response = new AMessage;
981    sp<MetaData> format = doGetFormatMeta(audio);
982    response->setPointer("format", format.get());
983
984    sp<AReplyToken> replyID;
985    CHECK(msg->senderAwaitsResponse(&replyID));
986    response->postReply(replyID);
987}
988
989sp<MetaData> NuPlayer::GenericSource::doGetFormatMeta(bool audio) const {
990    sp<MediaSource> source = audio ? mAudioTrack.mSource : mVideoTrack.mSource;
991
992    if (source == NULL) {
993        return NULL;
994    }
995
996    return source->getFormat();
997}
998
999status_t NuPlayer::GenericSource::dequeueAccessUnit(
1000        bool audio, sp<ABuffer> *accessUnit) {
1001    Track *track = audio ? &mAudioTrack : &mVideoTrack;
1002
1003    if (track->mSource == NULL) {
1004        return -EWOULDBLOCK;
1005    }
1006
1007    if (mIsWidevine && !audio) {
1008        // try to read a buffer as we may not have been able to the last time
1009        postReadBuffer(MEDIA_TRACK_TYPE_VIDEO);
1010    }
1011
1012    status_t finalResult;
1013    if (!track->mPackets->hasBufferAvailable(&finalResult)) {
1014        if (finalResult == OK) {
1015            postReadBuffer(
1016                    audio ? MEDIA_TRACK_TYPE_AUDIO : MEDIA_TRACK_TYPE_VIDEO);
1017            return -EWOULDBLOCK;
1018        }
1019        return finalResult;
1020    }
1021
1022    status_t result = track->mPackets->dequeueAccessUnit(accessUnit);
1023
1024    // start pulling in more buffers if we only have one (or no) buffer left
1025    // so that decoder has less chance of being starved
1026    if (track->mPackets->getAvailableBufferCount(&finalResult) < 2) {
1027        postReadBuffer(audio? MEDIA_TRACK_TYPE_AUDIO : MEDIA_TRACK_TYPE_VIDEO);
1028    }
1029
1030    if (result != OK) {
1031        if (mSubtitleTrack.mSource != NULL) {
1032            mSubtitleTrack.mPackets->clear();
1033            mFetchSubtitleDataGeneration++;
1034        }
1035        if (mTimedTextTrack.mSource != NULL) {
1036            mTimedTextTrack.mPackets->clear();
1037            mFetchTimedTextDataGeneration++;
1038        }
1039        return result;
1040    }
1041
1042    int64_t timeUs;
1043    status_t eosResult; // ignored
1044    CHECK((*accessUnit)->meta()->findInt64("timeUs", &timeUs));
1045    if (audio) {
1046        mAudioLastDequeueTimeUs = timeUs;
1047    } else {
1048        mVideoLastDequeueTimeUs = timeUs;
1049    }
1050
1051    if (mSubtitleTrack.mSource != NULL
1052            && !mSubtitleTrack.mPackets->hasBufferAvailable(&eosResult)) {
1053        sp<AMessage> msg = new AMessage(kWhatFetchSubtitleData, this);
1054        msg->setInt64("timeUs", timeUs);
1055        msg->setInt32("generation", mFetchSubtitleDataGeneration);
1056        msg->post();
1057    }
1058
1059    if (mTimedTextTrack.mSource != NULL
1060            && !mTimedTextTrack.mPackets->hasBufferAvailable(&eosResult)) {
1061        sp<AMessage> msg = new AMessage(kWhatFetchTimedTextData, this);
1062        msg->setInt64("timeUs", timeUs);
1063        msg->setInt32("generation", mFetchTimedTextDataGeneration);
1064        msg->post();
1065    }
1066
1067    return result;
1068}
1069
1070status_t NuPlayer::GenericSource::getDuration(int64_t *durationUs) {
1071    *durationUs = mDurationUs;
1072    return OK;
1073}
1074
1075size_t NuPlayer::GenericSource::getTrackCount() const {
1076    return mSources.size();
1077}
1078
1079sp<AMessage> NuPlayer::GenericSource::getTrackInfo(size_t trackIndex) const {
1080    size_t trackCount = mSources.size();
1081    if (trackIndex >= trackCount) {
1082        return NULL;
1083    }
1084
1085    sp<AMessage> format = new AMessage();
1086    sp<MetaData> meta = mSources.itemAt(trackIndex)->getFormat();
1087
1088    const char *mime;
1089    CHECK(meta->findCString(kKeyMIMEType, &mime));
1090    format->setString("mime", mime);
1091
1092    int32_t trackType;
1093    if (!strncasecmp(mime, "video/", 6)) {
1094        trackType = MEDIA_TRACK_TYPE_VIDEO;
1095    } else if (!strncasecmp(mime, "audio/", 6)) {
1096        trackType = MEDIA_TRACK_TYPE_AUDIO;
1097    } else if (!strcasecmp(mime, MEDIA_MIMETYPE_TEXT_3GPP)) {
1098        trackType = MEDIA_TRACK_TYPE_TIMEDTEXT;
1099    } else {
1100        trackType = MEDIA_TRACK_TYPE_UNKNOWN;
1101    }
1102    format->setInt32("type", trackType);
1103
1104    const char *lang;
1105    if (!meta->findCString(kKeyMediaLanguage, &lang)) {
1106        lang = "und";
1107    }
1108    format->setString("language", lang);
1109
1110    if (trackType == MEDIA_TRACK_TYPE_SUBTITLE) {
1111        int32_t isAutoselect = 1, isDefault = 0, isForced = 0;
1112        meta->findInt32(kKeyTrackIsAutoselect, &isAutoselect);
1113        meta->findInt32(kKeyTrackIsDefault, &isDefault);
1114        meta->findInt32(kKeyTrackIsForced, &isForced);
1115
1116        format->setInt32("auto", !!isAutoselect);
1117        format->setInt32("default", !!isDefault);
1118        format->setInt32("forced", !!isForced);
1119    }
1120
1121    return format;
1122}
1123
1124ssize_t NuPlayer::GenericSource::getSelectedTrack(media_track_type type) const {
1125    sp<AMessage> msg = new AMessage(kWhatGetSelectedTrack, this);
1126    msg->setInt32("type", type);
1127
1128    sp<AMessage> response;
1129    int32_t index;
1130    status_t err = msg->postAndAwaitResponse(&response);
1131    if (err == OK && response != NULL) {
1132        CHECK(response->findInt32("index", &index));
1133        return index;
1134    } else {
1135        return -1;
1136    }
1137}
1138
1139void NuPlayer::GenericSource::onGetSelectedTrack(sp<AMessage> msg) const {
1140    int32_t tmpType;
1141    CHECK(msg->findInt32("type", &tmpType));
1142    media_track_type type = (media_track_type)tmpType;
1143
1144    sp<AMessage> response = new AMessage;
1145    ssize_t index = doGetSelectedTrack(type);
1146    response->setInt32("index", index);
1147
1148    sp<AReplyToken> replyID;
1149    CHECK(msg->senderAwaitsResponse(&replyID));
1150    response->postReply(replyID);
1151}
1152
1153ssize_t NuPlayer::GenericSource::doGetSelectedTrack(media_track_type type) const {
1154    const Track *track = NULL;
1155    switch (type) {
1156    case MEDIA_TRACK_TYPE_VIDEO:
1157        track = &mVideoTrack;
1158        break;
1159    case MEDIA_TRACK_TYPE_AUDIO:
1160        track = &mAudioTrack;
1161        break;
1162    case MEDIA_TRACK_TYPE_TIMEDTEXT:
1163        track = &mTimedTextTrack;
1164        break;
1165    case MEDIA_TRACK_TYPE_SUBTITLE:
1166        track = &mSubtitleTrack;
1167        break;
1168    default:
1169        break;
1170    }
1171
1172    if (track != NULL && track->mSource != NULL) {
1173        return track->mIndex;
1174    }
1175
1176    return -1;
1177}
1178
1179status_t NuPlayer::GenericSource::selectTrack(size_t trackIndex, bool select, int64_t timeUs) {
1180    ALOGV("%s track: %zu", select ? "select" : "deselect", trackIndex);
1181    sp<AMessage> msg = new AMessage(kWhatSelectTrack, this);
1182    msg->setInt32("trackIndex", trackIndex);
1183    msg->setInt32("select", select);
1184    msg->setInt64("timeUs", timeUs);
1185
1186    sp<AMessage> response;
1187    status_t err = msg->postAndAwaitResponse(&response);
1188    if (err == OK && response != NULL) {
1189        CHECK(response->findInt32("err", &err));
1190    }
1191
1192    return err;
1193}
1194
1195void NuPlayer::GenericSource::onSelectTrack(sp<AMessage> msg) {
1196    int32_t trackIndex, select;
1197    int64_t timeUs;
1198    CHECK(msg->findInt32("trackIndex", &trackIndex));
1199    CHECK(msg->findInt32("select", &select));
1200    CHECK(msg->findInt64("timeUs", &timeUs));
1201
1202    sp<AMessage> response = new AMessage;
1203    status_t err = doSelectTrack(trackIndex, select, timeUs);
1204    response->setInt32("err", err);
1205
1206    sp<AReplyToken> replyID;
1207    CHECK(msg->senderAwaitsResponse(&replyID));
1208    response->postReply(replyID);
1209}
1210
1211status_t NuPlayer::GenericSource::doSelectTrack(size_t trackIndex, bool select, int64_t timeUs) {
1212    if (trackIndex >= mSources.size()) {
1213        return BAD_INDEX;
1214    }
1215
1216    if (!select) {
1217        Track* track = NULL;
1218        if (mSubtitleTrack.mSource != NULL && trackIndex == mSubtitleTrack.mIndex) {
1219            track = &mSubtitleTrack;
1220            mFetchSubtitleDataGeneration++;
1221        } else if (mTimedTextTrack.mSource != NULL && trackIndex == mTimedTextTrack.mIndex) {
1222            track = &mTimedTextTrack;
1223            mFetchTimedTextDataGeneration++;
1224        }
1225        if (track == NULL) {
1226            return INVALID_OPERATION;
1227        }
1228        track->mSource->stop();
1229        track->mSource = NULL;
1230        track->mPackets->clear();
1231        return OK;
1232    }
1233
1234    const sp<MediaSource> source = mSources.itemAt(trackIndex);
1235    sp<MetaData> meta = source->getFormat();
1236    const char *mime;
1237    CHECK(meta->findCString(kKeyMIMEType, &mime));
1238    if (!strncasecmp(mime, "text/", 5)) {
1239        bool isSubtitle = strcasecmp(mime, MEDIA_MIMETYPE_TEXT_3GPP);
1240        Track *track = isSubtitle ? &mSubtitleTrack : &mTimedTextTrack;
1241        if (track->mSource != NULL && track->mIndex == trackIndex) {
1242            return OK;
1243        }
1244        track->mIndex = trackIndex;
1245        if (track->mSource != NULL) {
1246            track->mSource->stop();
1247        }
1248        track->mSource = mSources.itemAt(trackIndex);
1249        track->mSource->start();
1250        if (track->mPackets == NULL) {
1251            track->mPackets = new AnotherPacketSource(track->mSource->getFormat());
1252        } else {
1253            track->mPackets->clear();
1254            track->mPackets->setFormat(track->mSource->getFormat());
1255
1256        }
1257
1258        if (isSubtitle) {
1259            mFetchSubtitleDataGeneration++;
1260        } else {
1261            mFetchTimedTextDataGeneration++;
1262        }
1263
1264        status_t eosResult; // ignored
1265        if (mSubtitleTrack.mSource != NULL
1266                && !mSubtitleTrack.mPackets->hasBufferAvailable(&eosResult)) {
1267            sp<AMessage> msg = new AMessage(kWhatFetchSubtitleData, this);
1268            msg->setInt64("timeUs", timeUs);
1269            msg->setInt32("generation", mFetchSubtitleDataGeneration);
1270            msg->post();
1271        }
1272
1273        if (mTimedTextTrack.mSource != NULL
1274                && !mTimedTextTrack.mPackets->hasBufferAvailable(&eosResult)) {
1275            sp<AMessage> msg = new AMessage(kWhatFetchTimedTextData, this);
1276            msg->setInt64("timeUs", timeUs);
1277            msg->setInt32("generation", mFetchTimedTextDataGeneration);
1278            msg->post();
1279        }
1280
1281        return OK;
1282    } else if (!strncasecmp(mime, "audio/", 6) || !strncasecmp(mime, "video/", 6)) {
1283        bool audio = !strncasecmp(mime, "audio/", 6);
1284        Track *track = audio ? &mAudioTrack : &mVideoTrack;
1285        if (track->mSource != NULL && track->mIndex == trackIndex) {
1286            return OK;
1287        }
1288
1289        sp<AMessage> msg = new AMessage(kWhatChangeAVSource, this);
1290        msg->setInt32("trackIndex", trackIndex);
1291        msg->post();
1292        return OK;
1293    }
1294
1295    return INVALID_OPERATION;
1296}
1297
1298status_t NuPlayer::GenericSource::seekTo(int64_t seekTimeUs) {
1299    sp<AMessage> msg = new AMessage(kWhatSeek, this);
1300    msg->setInt64("seekTimeUs", seekTimeUs);
1301
1302    sp<AMessage> response;
1303    status_t err = msg->postAndAwaitResponse(&response);
1304    if (err == OK && response != NULL) {
1305        CHECK(response->findInt32("err", &err));
1306    }
1307
1308    return err;
1309}
1310
1311void NuPlayer::GenericSource::onSeek(sp<AMessage> msg) {
1312    int64_t seekTimeUs;
1313    CHECK(msg->findInt64("seekTimeUs", &seekTimeUs));
1314
1315    sp<AMessage> response = new AMessage;
1316    status_t err = doSeek(seekTimeUs);
1317    response->setInt32("err", err);
1318
1319    sp<AReplyToken> replyID;
1320    CHECK(msg->senderAwaitsResponse(&replyID));
1321    response->postReply(replyID);
1322}
1323
1324status_t NuPlayer::GenericSource::doSeek(int64_t seekTimeUs) {
1325    // If the Widevine source is stopped, do not attempt to read any
1326    // more buffers.
1327    if (mStopRead) {
1328        return INVALID_OPERATION;
1329    }
1330    if (mVideoTrack.mSource != NULL) {
1331        int64_t actualTimeUs;
1332        readBuffer(MEDIA_TRACK_TYPE_VIDEO, seekTimeUs, &actualTimeUs);
1333
1334        seekTimeUs = actualTimeUs;
1335        mVideoLastDequeueTimeUs = seekTimeUs;
1336    }
1337
1338    if (mAudioTrack.mSource != NULL) {
1339        readBuffer(MEDIA_TRACK_TYPE_AUDIO, seekTimeUs);
1340        mAudioLastDequeueTimeUs = seekTimeUs;
1341    }
1342
1343    setDrmPlaybackStatusIfNeeded(Playback::START, seekTimeUs / 1000);
1344    if (!mStarted) {
1345        setDrmPlaybackStatusIfNeeded(Playback::PAUSE, 0);
1346    }
1347
1348    // If currently buffering, post kWhatBufferingEnd first, so that
1349    // NuPlayer resumes. Otherwise, if cache hits high watermark
1350    // before new polling happens, no one will resume the playback.
1351    stopBufferingIfNecessary();
1352    restartPollBuffering();
1353
1354    return OK;
1355}
1356
1357sp<ABuffer> NuPlayer::GenericSource::mediaBufferToABuffer(
1358        MediaBuffer* mb,
1359        media_track_type trackType,
1360        int64_t /* seekTimeUs */,
1361        int64_t *actualTimeUs) {
1362    bool audio = trackType == MEDIA_TRACK_TYPE_AUDIO;
1363    size_t outLength = mb->range_length();
1364
1365    if (audio && mAudioIsVorbis) {
1366        outLength += sizeof(int32_t);
1367    }
1368
1369    sp<ABuffer> ab;
1370    if (mIsSecure && !audio) {
1371        // data is already provided in the buffer
1372        ab = new ABuffer(NULL, mb->range_length());
1373        mb->add_ref();
1374        ab->setMediaBufferBase(mb);
1375    } else {
1376        ab = new ABuffer(outLength);
1377        memcpy(ab->data(),
1378               (const uint8_t *)mb->data() + mb->range_offset(),
1379               mb->range_length());
1380    }
1381
1382    if (audio && mAudioIsVorbis) {
1383        int32_t numPageSamples;
1384        if (!mb->meta_data()->findInt32(kKeyValidSamples, &numPageSamples)) {
1385            numPageSamples = -1;
1386        }
1387
1388        uint8_t* abEnd = ab->data() + mb->range_length();
1389        memcpy(abEnd, &numPageSamples, sizeof(numPageSamples));
1390    }
1391
1392    sp<AMessage> meta = ab->meta();
1393
1394    int64_t timeUs;
1395    CHECK(mb->meta_data()->findInt64(kKeyTime, &timeUs));
1396    meta->setInt64("timeUs", timeUs);
1397
1398#if 0
1399    // Temporarily disable pre-roll till we have a full solution to handle
1400    // both single seek and continous seek gracefully.
1401    if (seekTimeUs > timeUs) {
1402        sp<AMessage> extra = new AMessage;
1403        extra->setInt64("resume-at-mediaTimeUs", seekTimeUs);
1404        meta->setMessage("extra", extra);
1405    }
1406#endif
1407
1408    if (trackType == MEDIA_TRACK_TYPE_TIMEDTEXT) {
1409        const char *mime;
1410        CHECK(mTimedTextTrack.mSource != NULL
1411                && mTimedTextTrack.mSource->getFormat()->findCString(kKeyMIMEType, &mime));
1412        meta->setString("mime", mime);
1413    }
1414
1415    int64_t durationUs;
1416    if (mb->meta_data()->findInt64(kKeyDuration, &durationUs)) {
1417        meta->setInt64("durationUs", durationUs);
1418    }
1419
1420    if (trackType == MEDIA_TRACK_TYPE_SUBTITLE) {
1421        meta->setInt32("trackIndex", mSubtitleTrack.mIndex);
1422    }
1423
1424    uint32_t dataType; // unused
1425    const void *seiData;
1426    size_t seiLength;
1427    if (mb->meta_data()->findData(kKeySEI, &dataType, &seiData, &seiLength)) {
1428        sp<ABuffer> sei = ABuffer::CreateAsCopy(seiData, seiLength);;
1429        meta->setBuffer("sei", sei);
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, this);
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            } else {
1480                maxBuffers = 4;
1481            }
1482            break;
1483        case MEDIA_TRACK_TYPE_AUDIO:
1484            track = &mAudioTrack;
1485            if (mIsWidevine) {
1486                maxBuffers = 8;
1487            } else {
1488                maxBuffers = 64;
1489            }
1490            break;
1491        case MEDIA_TRACK_TYPE_SUBTITLE:
1492            track = &mSubtitleTrack;
1493            break;
1494        case MEDIA_TRACK_TYPE_TIMEDTEXT:
1495            track = &mTimedTextTrack;
1496            break;
1497        default:
1498            TRESPASS();
1499    }
1500
1501    if (track->mSource == NULL) {
1502        return;
1503    }
1504
1505    if (actualTimeUs) {
1506        *actualTimeUs = seekTimeUs;
1507    }
1508
1509    MediaSource::ReadOptions options;
1510
1511    bool seeking = false;
1512
1513    if (seekTimeUs >= 0) {
1514        options.setSeekTo(seekTimeUs, MediaSource::ReadOptions::SEEK_PREVIOUS_SYNC);
1515        seeking = true;
1516    }
1517
1518    if (mIsWidevine) {
1519        options.setNonBlocking();
1520    }
1521
1522    for (size_t numBuffers = 0; numBuffers < maxBuffers; ) {
1523        MediaBuffer *mbuf;
1524        status_t err = track->mSource->read(&mbuf, &options);
1525
1526        options.clearSeekTo();
1527
1528        if (err == OK) {
1529            int64_t timeUs;
1530            CHECK(mbuf->meta_data()->findInt64(kKeyTime, &timeUs));
1531            if (trackType == MEDIA_TRACK_TYPE_AUDIO) {
1532                mAudioTimeUs = timeUs;
1533            } else if (trackType == MEDIA_TRACK_TYPE_VIDEO) {
1534                mVideoTimeUs = timeUs;
1535            }
1536
1537            queueDiscontinuityIfNeeded(seeking, formatChange, trackType, track);
1538
1539            sp<ABuffer> buffer = mediaBufferToABuffer(
1540                    mbuf, trackType, seekTimeUs, actualTimeUs);
1541            track->mPackets->queueAccessUnit(buffer);
1542            formatChange = false;
1543            seeking = false;
1544            ++numBuffers;
1545        } else if (err == WOULD_BLOCK) {
1546            break;
1547        } else if (err == INFO_FORMAT_CHANGED) {
1548#if 0
1549            track->mPackets->queueDiscontinuity(
1550                    ATSParser::DISCONTINUITY_FORMATCHANGE,
1551                    NULL,
1552                    false /* discard */);
1553#endif
1554        } else {
1555            queueDiscontinuityIfNeeded(seeking, formatChange, trackType, track);
1556            track->mPackets->signalEOS(err);
1557            break;
1558        }
1559    }
1560}
1561
1562void NuPlayer::GenericSource::queueDiscontinuityIfNeeded(
1563        bool seeking, bool formatChange, media_track_type trackType, Track *track) {
1564    // formatChange && seeking: track whose source is changed during selection
1565    // formatChange && !seeking: track whose source is not changed during selection
1566    // !formatChange: normal seek
1567    if ((seeking || formatChange)
1568            && (trackType == MEDIA_TRACK_TYPE_AUDIO
1569            || trackType == MEDIA_TRACK_TYPE_VIDEO)) {
1570        ATSParser::DiscontinuityType type = (formatChange && seeking)
1571                ? ATSParser::DISCONTINUITY_FORMATCHANGE
1572                : ATSParser::DISCONTINUITY_NONE;
1573        track->mPackets->queueDiscontinuity(type, NULL /* extra */, true /* discard */);
1574    }
1575}
1576
1577}  // namespace android
1578