GenericSource.cpp revision ebc2712d5e8a66f8d6652e7cc7fb14cdbec7f235 
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                mCachedSource.clear();
478                mHttpSource.clear();
479            }
480        }
481        mBitrate = -1;
482
483        cancelPollBuffering();
484    }
485    notifyPrepared(err);
486}
487
488void NuPlayer::GenericSource::start() {
489    ALOGI("start");
490
491    mStopRead = false;
492    if (mAudioTrack.mSource != NULL) {
493        postReadBuffer(MEDIA_TRACK_TYPE_AUDIO);
494    }
495
496    if (mVideoTrack.mSource != NULL) {
497        postReadBuffer(MEDIA_TRACK_TYPE_VIDEO);
498    }
499
500    setDrmPlaybackStatusIfNeeded(Playback::START, getLastReadPosition() / 1000);
501    mStarted = true;
502
503    (new AMessage(kWhatStart, this))->post();
504}
505
506void NuPlayer::GenericSource::stop() {
507    // nothing to do, just account for DRM playback status
508    setDrmPlaybackStatusIfNeeded(Playback::STOP, 0);
509    mStarted = false;
510    if (mIsWidevine || mIsSecure) {
511        // For widevine or secure sources we need to prevent any further reads.
512        sp<AMessage> msg = new AMessage(kWhatStopWidevine, this);
513        sp<AMessage> response;
514        (void) msg->postAndAwaitResponse(&response);
515    }
516}
517
518void NuPlayer::GenericSource::pause() {
519    // nothing to do, just account for DRM playback status
520    setDrmPlaybackStatusIfNeeded(Playback::PAUSE, 0);
521    mStarted = false;
522}
523
524void NuPlayer::GenericSource::resume() {
525    // nothing to do, just account for DRM playback status
526    setDrmPlaybackStatusIfNeeded(Playback::START, getLastReadPosition() / 1000);
527    mStarted = true;
528
529    (new AMessage(kWhatResume, this))->post();
530}
531
532void NuPlayer::GenericSource::disconnect() {
533    sp<DataSource> dataSource, httpSource;
534    {
535        Mutex::Autolock _l(mDisconnectLock);
536        dataSource = mDataSource;
537        httpSource = mHttpSource;
538    }
539
540    if (dataSource != NULL) {
541        // disconnect data source
542        if (dataSource->flags() & DataSource::kIsCachingDataSource) {
543            static_cast<NuCachedSource2 *>(dataSource.get())->disconnect();
544        }
545    } else if (httpSource != NULL) {
546        static_cast<HTTPBase *>(httpSource.get())->disconnect();
547    }
548}
549
550void NuPlayer::GenericSource::setDrmPlaybackStatusIfNeeded(int playbackStatus, int64_t position) {
551    if (mDecryptHandle != NULL) {
552        mDrmManagerClient->setPlaybackStatus(mDecryptHandle, playbackStatus, position);
553    }
554    mSubtitleTrack.mPackets = new AnotherPacketSource(NULL);
555    mTimedTextTrack.mPackets = new AnotherPacketSource(NULL);
556}
557
558status_t NuPlayer::GenericSource::feedMoreTSData() {
559    return OK;
560}
561
562void NuPlayer::GenericSource::schedulePollBuffering() {
563    sp<AMessage> msg = new AMessage(kWhatPollBuffering, this);
564    msg->setInt32("generation", mPollBufferingGeneration);
565    msg->post(1000000ll);
566}
567
568void NuPlayer::GenericSource::cancelPollBuffering() {
569    mBuffering = false;
570    ++mPollBufferingGeneration;
571    mPrevBufferPercentage = -1;
572}
573
574void NuPlayer::GenericSource::restartPollBuffering() {
575    if (mIsStreaming) {
576        cancelPollBuffering();
577        onPollBuffering();
578    }
579}
580
581void NuPlayer::GenericSource::notifyBufferingUpdate(int32_t percentage) {
582    // Buffering percent could go backward as it's estimated from remaining
583    // data and last access time. This could cause the buffering position
584    // drawn on media control to jitter slightly. Remember previously reported
585    // percentage and don't allow it to go backward.
586    if (percentage < mPrevBufferPercentage) {
587        percentage = mPrevBufferPercentage;
588    } else if (percentage > 100) {
589        percentage = 100;
590    }
591
592    mPrevBufferPercentage = percentage;
593
594    ALOGV("notifyBufferingUpdate: buffering %d%%", percentage);
595
596    sp<AMessage> msg = dupNotify();
597    msg->setInt32("what", kWhatBufferingUpdate);
598    msg->setInt32("percentage", percentage);
599    msg->post();
600}
601
602void NuPlayer::GenericSource::startBufferingIfNecessary() {
603    ALOGV("startBufferingIfNecessary: mPrepareBuffering=%d, mBuffering=%d",
604            mPrepareBuffering, mBuffering);
605
606    if (mPrepareBuffering) {
607        return;
608    }
609
610    if (!mBuffering) {
611        mBuffering = true;
612
613        ensureCacheIsFetching();
614        sendCacheStats();
615
616        sp<AMessage> notify = dupNotify();
617        notify->setInt32("what", kWhatPauseOnBufferingStart);
618        notify->post();
619    }
620}
621
622void NuPlayer::GenericSource::stopBufferingIfNecessary() {
623    ALOGV("stopBufferingIfNecessary: mPrepareBuffering=%d, mBuffering=%d",
624            mPrepareBuffering, mBuffering);
625
626    if (mPrepareBuffering) {
627        mPrepareBuffering = false;
628        notifyPrepared();
629        return;
630    }
631
632    if (mBuffering) {
633        mBuffering = false;
634
635        sendCacheStats();
636
637        sp<AMessage> notify = dupNotify();
638        notify->setInt32("what", kWhatResumeOnBufferingEnd);
639        notify->post();
640    }
641}
642
643void NuPlayer::GenericSource::sendCacheStats() {
644    int32_t kbps = 0;
645    status_t err = UNKNOWN_ERROR;
646
647    if (mWVMExtractor != NULL) {
648        err = mWVMExtractor->getEstimatedBandwidthKbps(&kbps);
649    } else if (mCachedSource != NULL) {
650        err = mCachedSource->getEstimatedBandwidthKbps(&kbps);
651    }
652
653    if (err == OK) {
654        sp<AMessage> notify = dupNotify();
655        notify->setInt32("what", kWhatCacheStats);
656        notify->setInt32("bandwidth", kbps);
657        notify->post();
658    }
659}
660
661void NuPlayer::GenericSource::ensureCacheIsFetching() {
662    if (mCachedSource != NULL) {
663        mCachedSource->resumeFetchingIfNecessary();
664    }
665}
666
667void NuPlayer::GenericSource::onPollBuffering() {
668    status_t finalStatus = UNKNOWN_ERROR;
669    int64_t cachedDurationUs = -1ll;
670    ssize_t cachedDataRemaining = -1;
671
672    ALOGW_IF(mWVMExtractor != NULL && mCachedSource != NULL,
673            "WVMExtractor and NuCachedSource both present");
674
675    if (mWVMExtractor != NULL) {
676        cachedDurationUs =
677                mWVMExtractor->getCachedDurationUs(&finalStatus);
678    } else if (mCachedSource != NULL) {
679        cachedDataRemaining =
680                mCachedSource->approxDataRemaining(&finalStatus);
681
682        if (finalStatus == OK) {
683            off64_t size;
684            int64_t bitrate = 0ll;
685            if (mDurationUs > 0 && mCachedSource->getSize(&size) == OK) {
686                bitrate = size * 8000000ll / mDurationUs;
687            } else if (mBitrate > 0) {
688                bitrate = mBitrate;
689            }
690            if (bitrate > 0) {
691                cachedDurationUs = cachedDataRemaining * 8000000ll / bitrate;
692            }
693        }
694    }
695
696    if (finalStatus != OK) {
697        ALOGV("onPollBuffering: EOS (finalStatus = %d)", finalStatus);
698
699        if (finalStatus == ERROR_END_OF_STREAM) {
700            notifyBufferingUpdate(100);
701        }
702
703        stopBufferingIfNecessary();
704        return;
705    } else if (cachedDurationUs >= 0ll) {
706        if (mDurationUs > 0ll) {
707            int64_t cachedPosUs = getLastReadPosition() + cachedDurationUs;
708            int percentage = 100.0 * cachedPosUs / mDurationUs;
709            if (percentage > 100) {
710                percentage = 100;
711            }
712
713            notifyBufferingUpdate(percentage);
714        }
715
716        ALOGV("onPollBuffering: cachedDurationUs %.1f sec",
717                cachedDurationUs / 1000000.0f);
718
719        if (cachedDurationUs < kLowWaterMarkUs) {
720            startBufferingIfNecessary();
721        } else if (cachedDurationUs > kHighWaterMarkUs) {
722            stopBufferingIfNecessary();
723        }
724    } else if (cachedDataRemaining >= 0) {
725        ALOGV("onPollBuffering: cachedDataRemaining %zd bytes",
726                cachedDataRemaining);
727
728        if (cachedDataRemaining < kLowWaterMarkBytes) {
729            startBufferingIfNecessary();
730        } else if (cachedDataRemaining > kHighWaterMarkBytes) {
731            stopBufferingIfNecessary();
732        }
733    }
734
735    schedulePollBuffering();
736}
737
738void NuPlayer::GenericSource::onMessageReceived(const sp<AMessage> &msg) {
739    switch (msg->what()) {
740      case kWhatPrepareAsync:
741      {
742          onPrepareAsync();
743          break;
744      }
745      case kWhatFetchSubtitleData:
746      {
747          fetchTextData(kWhatSendSubtitleData, MEDIA_TRACK_TYPE_SUBTITLE,
748                  mFetchSubtitleDataGeneration, mSubtitleTrack.mPackets, msg);
749          break;
750      }
751
752      case kWhatFetchTimedTextData:
753      {
754          fetchTextData(kWhatSendTimedTextData, MEDIA_TRACK_TYPE_TIMEDTEXT,
755                  mFetchTimedTextDataGeneration, mTimedTextTrack.mPackets, msg);
756          break;
757      }
758
759      case kWhatSendSubtitleData:
760      {
761          sendTextData(kWhatSubtitleData, MEDIA_TRACK_TYPE_SUBTITLE,
762                  mFetchSubtitleDataGeneration, mSubtitleTrack.mPackets, msg);
763          break;
764      }
765
766      case kWhatSendTimedTextData:
767      {
768          sendTextData(kWhatTimedTextData, MEDIA_TRACK_TYPE_TIMEDTEXT,
769                  mFetchTimedTextDataGeneration, mTimedTextTrack.mPackets, msg);
770          break;
771      }
772
773      case kWhatChangeAVSource:
774      {
775          int32_t trackIndex;
776          CHECK(msg->findInt32("trackIndex", &trackIndex));
777          const sp<MediaSource> source = mSources.itemAt(trackIndex);
778
779          Track* track;
780          const char *mime;
781          media_track_type trackType, counterpartType;
782          sp<MetaData> meta = source->getFormat();
783          meta->findCString(kKeyMIMEType, &mime);
784          if (!strncasecmp(mime, "audio/", 6)) {
785              track = &mAudioTrack;
786              trackType = MEDIA_TRACK_TYPE_AUDIO;
787              counterpartType = MEDIA_TRACK_TYPE_VIDEO;;
788          } else {
789              CHECK(!strncasecmp(mime, "video/", 6));
790              track = &mVideoTrack;
791              trackType = MEDIA_TRACK_TYPE_VIDEO;
792              counterpartType = MEDIA_TRACK_TYPE_AUDIO;;
793          }
794
795
796          if (track->mSource != NULL) {
797              track->mSource->stop();
798          }
799          track->mSource = source;
800          track->mSource->start();
801          track->mIndex = trackIndex;
802
803          int64_t timeUs, actualTimeUs;
804          const bool formatChange = true;
805          if (trackType == MEDIA_TRACK_TYPE_AUDIO) {
806              timeUs = mAudioLastDequeueTimeUs;
807          } else {
808              timeUs = mVideoLastDequeueTimeUs;
809          }
810          readBuffer(trackType, timeUs, &actualTimeUs, formatChange);
811          readBuffer(counterpartType, -1, NULL, formatChange);
812          ALOGV("timeUs %lld actualTimeUs %lld", (long long)timeUs, (long long)actualTimeUs);
813
814          break;
815      }
816
817      case kWhatStart:
818      case kWhatResume:
819      {
820          restartPollBuffering();
821          break;
822      }
823
824      case kWhatPollBuffering:
825      {
826          int32_t generation;
827          CHECK(msg->findInt32("generation", &generation));
828          if (generation == mPollBufferingGeneration) {
829              onPollBuffering();
830          }
831          break;
832      }
833
834      case kWhatGetFormat:
835      {
836          onGetFormatMeta(msg);
837          break;
838      }
839
840      case kWhatGetSelectedTrack:
841      {
842          onGetSelectedTrack(msg);
843          break;
844      }
845
846      case kWhatSelectTrack:
847      {
848          onSelectTrack(msg);
849          break;
850      }
851
852      case kWhatSeek:
853      {
854          onSeek(msg);
855          break;
856      }
857
858      case kWhatReadBuffer:
859      {
860          onReadBuffer(msg);
861          break;
862      }
863
864      case kWhatSecureDecodersInstantiated:
865      {
866          int32_t err;
867          CHECK(msg->findInt32("err", &err));
868          onSecureDecodersInstantiated(err);
869          break;
870      }
871
872      case kWhatStopWidevine:
873      {
874          // mStopRead is only used for Widevine to prevent the video source
875          // from being read while the associated video decoder is shutting down.
876          mStopRead = true;
877          if (mVideoTrack.mSource != NULL) {
878              mVideoTrack.mPackets->clear();
879          }
880          sp<AMessage> response = new AMessage;
881          sp<AReplyToken> replyID;
882          CHECK(msg->senderAwaitsResponse(&replyID));
883          response->postReply(replyID);
884          break;
885      }
886      default:
887          Source::onMessageReceived(msg);
888          break;
889    }
890}
891
892void NuPlayer::GenericSource::fetchTextData(
893        uint32_t sendWhat,
894        media_track_type type,
895        int32_t curGen,
896        sp<AnotherPacketSource> packets,
897        sp<AMessage> msg) {
898    int32_t msgGeneration;
899    CHECK(msg->findInt32("generation", &msgGeneration));
900    if (msgGeneration != curGen) {
901        // stale
902        return;
903    }
904
905    int32_t avail;
906    if (packets->hasBufferAvailable(&avail)) {
907        return;
908    }
909
910    int64_t timeUs;
911    CHECK(msg->findInt64("timeUs", &timeUs));
912
913    int64_t subTimeUs;
914    readBuffer(type, timeUs, &subTimeUs);
915
916    int64_t delayUs = subTimeUs - timeUs;
917    if (msg->what() == kWhatFetchSubtitleData) {
918        const int64_t oneSecUs = 1000000ll;
919        delayUs -= oneSecUs;
920    }
921    sp<AMessage> msg2 = new AMessage(sendWhat, this);
922    msg2->setInt32("generation", msgGeneration);
923    msg2->post(delayUs < 0 ? 0 : delayUs);
924}
925
926void NuPlayer::GenericSource::sendTextData(
927        uint32_t what,
928        media_track_type type,
929        int32_t curGen,
930        sp<AnotherPacketSource> packets,
931        sp<AMessage> msg) {
932    int32_t msgGeneration;
933    CHECK(msg->findInt32("generation", &msgGeneration));
934    if (msgGeneration != curGen) {
935        // stale
936        return;
937    }
938
939    int64_t subTimeUs;
940    if (packets->nextBufferTime(&subTimeUs) != OK) {
941        return;
942    }
943
944    int64_t nextSubTimeUs;
945    readBuffer(type, -1, &nextSubTimeUs);
946
947    sp<ABuffer> buffer;
948    status_t dequeueStatus = packets->dequeueAccessUnit(&buffer);
949    if (dequeueStatus == OK) {
950        sp<AMessage> notify = dupNotify();
951        notify->setInt32("what", what);
952        notify->setBuffer("buffer", buffer);
953        notify->post();
954
955        const int64_t delayUs = nextSubTimeUs - subTimeUs;
956        msg->post(delayUs < 0 ? 0 : delayUs);
957    }
958}
959
960sp<MetaData> NuPlayer::GenericSource::getFormatMeta(bool audio) {
961    sp<AMessage> msg = new AMessage(kWhatGetFormat, this);
962    msg->setInt32("audio", audio);
963
964    sp<AMessage> response;
965    void *format;
966    status_t err = msg->postAndAwaitResponse(&response);
967    if (err == OK && response != NULL) {
968        CHECK(response->findPointer("format", &format));
969        return (MetaData *)format;
970    } else {
971        return NULL;
972    }
973}
974
975void NuPlayer::GenericSource::onGetFormatMeta(sp<AMessage> msg) const {
976    int32_t audio;
977    CHECK(msg->findInt32("audio", &audio));
978
979    sp<AMessage> response = new AMessage;
980    sp<MetaData> format = doGetFormatMeta(audio);
981    response->setPointer("format", format.get());
982
983    sp<AReplyToken> replyID;
984    CHECK(msg->senderAwaitsResponse(&replyID));
985    response->postReply(replyID);
986}
987
988sp<MetaData> NuPlayer::GenericSource::doGetFormatMeta(bool audio) const {
989    sp<MediaSource> source = audio ? mAudioTrack.mSource : mVideoTrack.mSource;
990
991    if (source == NULL) {
992        return NULL;
993    }
994
995    return source->getFormat();
996}
997
998status_t NuPlayer::GenericSource::dequeueAccessUnit(
999        bool audio, sp<ABuffer> *accessUnit) {
1000    Track *track = audio ? &mAudioTrack : &mVideoTrack;
1001
1002    if (track->mSource == NULL) {
1003        return -EWOULDBLOCK;
1004    }
1005
1006    if (mIsWidevine && !audio) {
1007        // try to read a buffer as we may not have been able to the last time
1008        postReadBuffer(MEDIA_TRACK_TYPE_VIDEO);
1009    }
1010
1011    status_t finalResult;
1012    if (!track->mPackets->hasBufferAvailable(&finalResult)) {
1013        if (finalResult == OK) {
1014            postReadBuffer(
1015                    audio ? MEDIA_TRACK_TYPE_AUDIO : MEDIA_TRACK_TYPE_VIDEO);
1016            return -EWOULDBLOCK;
1017        }
1018        return finalResult;
1019    }
1020
1021    status_t result = track->mPackets->dequeueAccessUnit(accessUnit);
1022
1023    // start pulling in more buffers if we only have one (or no) buffer left
1024    // so that decoder has less chance of being starved
1025    if (track->mPackets->getAvailableBufferCount(&finalResult) < 2) {
1026        postReadBuffer(audio? MEDIA_TRACK_TYPE_AUDIO : MEDIA_TRACK_TYPE_VIDEO);
1027    }
1028
1029    if (result != OK) {
1030        if (mSubtitleTrack.mSource != NULL) {
1031            mSubtitleTrack.mPackets->clear();
1032            mFetchSubtitleDataGeneration++;
1033        }
1034        if (mTimedTextTrack.mSource != NULL) {
1035            mTimedTextTrack.mPackets->clear();
1036            mFetchTimedTextDataGeneration++;
1037        }
1038        return result;
1039    }
1040
1041    int64_t timeUs;
1042    status_t eosResult; // ignored
1043    CHECK((*accessUnit)->meta()->findInt64("timeUs", &timeUs));
1044    if (audio) {
1045        mAudioLastDequeueTimeUs = timeUs;
1046    } else {
1047        mVideoLastDequeueTimeUs = timeUs;
1048    }
1049
1050    if (mSubtitleTrack.mSource != NULL
1051            && !mSubtitleTrack.mPackets->hasBufferAvailable(&eosResult)) {
1052        sp<AMessage> msg = new AMessage(kWhatFetchSubtitleData, this);
1053        msg->setInt64("timeUs", timeUs);
1054        msg->setInt32("generation", mFetchSubtitleDataGeneration);
1055        msg->post();
1056    }
1057
1058    if (mTimedTextTrack.mSource != NULL
1059            && !mTimedTextTrack.mPackets->hasBufferAvailable(&eosResult)) {
1060        sp<AMessage> msg = new AMessage(kWhatFetchTimedTextData, this);
1061        msg->setInt64("timeUs", timeUs);
1062        msg->setInt32("generation", mFetchTimedTextDataGeneration);
1063        msg->post();
1064    }
1065
1066    return result;
1067}
1068
1069status_t NuPlayer::GenericSource::getDuration(int64_t *durationUs) {
1070    *durationUs = mDurationUs;
1071    return OK;
1072}
1073
1074size_t NuPlayer::GenericSource::getTrackCount() const {
1075    return mSources.size();
1076}
1077
1078sp<AMessage> NuPlayer::GenericSource::getTrackInfo(size_t trackIndex) const {
1079    size_t trackCount = mSources.size();
1080    if (trackIndex >= trackCount) {
1081        return NULL;
1082    }
1083
1084    sp<AMessage> format = new AMessage();
1085    sp<MetaData> meta = mSources.itemAt(trackIndex)->getFormat();
1086
1087    const char *mime;
1088    CHECK(meta->findCString(kKeyMIMEType, &mime));
1089    format->setString("mime", mime);
1090
1091    int32_t trackType;
1092    if (!strncasecmp(mime, "video/", 6)) {
1093        trackType = MEDIA_TRACK_TYPE_VIDEO;
1094    } else if (!strncasecmp(mime, "audio/", 6)) {
1095        trackType = MEDIA_TRACK_TYPE_AUDIO;
1096    } else if (!strcasecmp(mime, MEDIA_MIMETYPE_TEXT_3GPP)) {
1097        trackType = MEDIA_TRACK_TYPE_TIMEDTEXT;
1098    } else {
1099        trackType = MEDIA_TRACK_TYPE_UNKNOWN;
1100    }
1101    format->setInt32("type", trackType);
1102
1103    const char *lang;
1104    if (!meta->findCString(kKeyMediaLanguage, &lang)) {
1105        lang = "und";
1106    }
1107    format->setString("language", lang);
1108
1109    if (trackType == MEDIA_TRACK_TYPE_SUBTITLE) {
1110        int32_t isAutoselect = 1, isDefault = 0, isForced = 0;
1111        meta->findInt32(kKeyTrackIsAutoselect, &isAutoselect);
1112        meta->findInt32(kKeyTrackIsDefault, &isDefault);
1113        meta->findInt32(kKeyTrackIsForced, &isForced);
1114
1115        format->setInt32("auto", !!isAutoselect);
1116        format->setInt32("default", !!isDefault);
1117        format->setInt32("forced", !!isForced);
1118    }
1119
1120    return format;
1121}
1122
1123ssize_t NuPlayer::GenericSource::getSelectedTrack(media_track_type type) const {
1124    sp<AMessage> msg = new AMessage(kWhatGetSelectedTrack, this);
1125    msg->setInt32("type", type);
1126
1127    sp<AMessage> response;
1128    int32_t index;
1129    status_t err = msg->postAndAwaitResponse(&response);
1130    if (err == OK && response != NULL) {
1131        CHECK(response->findInt32("index", &index));
1132        return index;
1133    } else {
1134        return -1;
1135    }
1136}
1137
1138void NuPlayer::GenericSource::onGetSelectedTrack(sp<AMessage> msg) const {
1139    int32_t tmpType;
1140    CHECK(msg->findInt32("type", &tmpType));
1141    media_track_type type = (media_track_type)tmpType;
1142
1143    sp<AMessage> response = new AMessage;
1144    ssize_t index = doGetSelectedTrack(type);
1145    response->setInt32("index", index);
1146
1147    sp<AReplyToken> replyID;
1148    CHECK(msg->senderAwaitsResponse(&replyID));
1149    response->postReply(replyID);
1150}
1151
1152ssize_t NuPlayer::GenericSource::doGetSelectedTrack(media_track_type type) const {
1153    const Track *track = NULL;
1154    switch (type) {
1155    case MEDIA_TRACK_TYPE_VIDEO:
1156        track = &mVideoTrack;
1157        break;
1158    case MEDIA_TRACK_TYPE_AUDIO:
1159        track = &mAudioTrack;
1160        break;
1161    case MEDIA_TRACK_TYPE_TIMEDTEXT:
1162        track = &mTimedTextTrack;
1163        break;
1164    case MEDIA_TRACK_TYPE_SUBTITLE:
1165        track = &mSubtitleTrack;
1166        break;
1167    default:
1168        break;
1169    }
1170
1171    if (track != NULL && track->mSource != NULL) {
1172        return track->mIndex;
1173    }
1174
1175    return -1;
1176}
1177
1178status_t NuPlayer::GenericSource::selectTrack(size_t trackIndex, bool select, int64_t timeUs) {
1179    ALOGV("%s track: %zu", select ? "select" : "deselect", trackIndex);
1180    sp<AMessage> msg = new AMessage(kWhatSelectTrack, this);
1181    msg->setInt32("trackIndex", trackIndex);
1182    msg->setInt32("select", select);
1183    msg->setInt64("timeUs", timeUs);
1184
1185    sp<AMessage> response;
1186    status_t err = msg->postAndAwaitResponse(&response);
1187    if (err == OK && response != NULL) {
1188        CHECK(response->findInt32("err", &err));
1189    }
1190
1191    return err;
1192}
1193
1194void NuPlayer::GenericSource::onSelectTrack(sp<AMessage> msg) {
1195    int32_t trackIndex, select;
1196    int64_t timeUs;
1197    CHECK(msg->findInt32("trackIndex", &trackIndex));
1198    CHECK(msg->findInt32("select", &select));
1199    CHECK(msg->findInt64("timeUs", &timeUs));
1200
1201    sp<AMessage> response = new AMessage;
1202    status_t err = doSelectTrack(trackIndex, select, timeUs);
1203    response->setInt32("err", err);
1204
1205    sp<AReplyToken> replyID;
1206    CHECK(msg->senderAwaitsResponse(&replyID));
1207    response->postReply(replyID);
1208}
1209
1210status_t NuPlayer::GenericSource::doSelectTrack(size_t trackIndex, bool select, int64_t timeUs) {
1211    if (trackIndex >= mSources.size()) {
1212        return BAD_INDEX;
1213    }
1214
1215    if (!select) {
1216        Track* track = NULL;
1217        if (mSubtitleTrack.mSource != NULL && trackIndex == mSubtitleTrack.mIndex) {
1218            track = &mSubtitleTrack;
1219            mFetchSubtitleDataGeneration++;
1220        } else if (mTimedTextTrack.mSource != NULL && trackIndex == mTimedTextTrack.mIndex) {
1221            track = &mTimedTextTrack;
1222            mFetchTimedTextDataGeneration++;
1223        }
1224        if (track == NULL) {
1225            return INVALID_OPERATION;
1226        }
1227        track->mSource->stop();
1228        track->mSource = NULL;
1229        track->mPackets->clear();
1230        return OK;
1231    }
1232
1233    const sp<MediaSource> source = mSources.itemAt(trackIndex);
1234    sp<MetaData> meta = source->getFormat();
1235    const char *mime;
1236    CHECK(meta->findCString(kKeyMIMEType, &mime));
1237    if (!strncasecmp(mime, "text/", 5)) {
1238        bool isSubtitle = strcasecmp(mime, MEDIA_MIMETYPE_TEXT_3GPP);
1239        Track *track = isSubtitle ? &mSubtitleTrack : &mTimedTextTrack;
1240        if (track->mSource != NULL && track->mIndex == trackIndex) {
1241            return OK;
1242        }
1243        track->mIndex = trackIndex;
1244        if (track->mSource != NULL) {
1245            track->mSource->stop();
1246        }
1247        track->mSource = mSources.itemAt(trackIndex);
1248        track->mSource->start();
1249        if (track->mPackets == NULL) {
1250            track->mPackets = new AnotherPacketSource(track->mSource->getFormat());
1251        } else {
1252            track->mPackets->clear();
1253            track->mPackets->setFormat(track->mSource->getFormat());
1254
1255        }
1256
1257        if (isSubtitle) {
1258            mFetchSubtitleDataGeneration++;
1259        } else {
1260            mFetchTimedTextDataGeneration++;
1261        }
1262
1263        status_t eosResult; // ignored
1264        if (mSubtitleTrack.mSource != NULL
1265                && !mSubtitleTrack.mPackets->hasBufferAvailable(&eosResult)) {
1266            sp<AMessage> msg = new AMessage(kWhatFetchSubtitleData, this);
1267            msg->setInt64("timeUs", timeUs);
1268            msg->setInt32("generation", mFetchSubtitleDataGeneration);
1269            msg->post();
1270        }
1271
1272        if (mTimedTextTrack.mSource != NULL
1273                && !mTimedTextTrack.mPackets->hasBufferAvailable(&eosResult)) {
1274            sp<AMessage> msg = new AMessage(kWhatFetchTimedTextData, this);
1275            msg->setInt64("timeUs", timeUs);
1276            msg->setInt32("generation", mFetchTimedTextDataGeneration);
1277            msg->post();
1278        }
1279
1280        return OK;
1281    } else if (!strncasecmp(mime, "audio/", 6) || !strncasecmp(mime, "video/", 6)) {
1282        bool audio = !strncasecmp(mime, "audio/", 6);
1283        Track *track = audio ? &mAudioTrack : &mVideoTrack;
1284        if (track->mSource != NULL && track->mIndex == trackIndex) {
1285            return OK;
1286        }
1287
1288        sp<AMessage> msg = new AMessage(kWhatChangeAVSource, this);
1289        msg->setInt32("trackIndex", trackIndex);
1290        msg->post();
1291        return OK;
1292    }
1293
1294    return INVALID_OPERATION;
1295}
1296
1297status_t NuPlayer::GenericSource::seekTo(int64_t seekTimeUs) {
1298    sp<AMessage> msg = new AMessage(kWhatSeek, this);
1299    msg->setInt64("seekTimeUs", seekTimeUs);
1300
1301    sp<AMessage> response;
1302    status_t err = msg->postAndAwaitResponse(&response);
1303    if (err == OK && response != NULL) {
1304        CHECK(response->findInt32("err", &err));
1305    }
1306
1307    return err;
1308}
1309
1310void NuPlayer::GenericSource::onSeek(sp<AMessage> msg) {
1311    int64_t seekTimeUs;
1312    CHECK(msg->findInt64("seekTimeUs", &seekTimeUs));
1313
1314    sp<AMessage> response = new AMessage;
1315    status_t err = doSeek(seekTimeUs);
1316    response->setInt32("err", err);
1317
1318    sp<AReplyToken> replyID;
1319    CHECK(msg->senderAwaitsResponse(&replyID));
1320    response->postReply(replyID);
1321}
1322
1323status_t NuPlayer::GenericSource::doSeek(int64_t seekTimeUs) {
1324    // If the Widevine source is stopped, do not attempt to read any
1325    // more buffers.
1326    if (mStopRead) {
1327        return INVALID_OPERATION;
1328    }
1329    if (mVideoTrack.mSource != NULL) {
1330        int64_t actualTimeUs;
1331        readBuffer(MEDIA_TRACK_TYPE_VIDEO, seekTimeUs, &actualTimeUs);
1332
1333        seekTimeUs = actualTimeUs;
1334        mVideoLastDequeueTimeUs = seekTimeUs;
1335    }
1336
1337    if (mAudioTrack.mSource != NULL) {
1338        readBuffer(MEDIA_TRACK_TYPE_AUDIO, seekTimeUs);
1339        mAudioLastDequeueTimeUs = seekTimeUs;
1340    }
1341
1342    setDrmPlaybackStatusIfNeeded(Playback::START, seekTimeUs / 1000);
1343    if (!mStarted) {
1344        setDrmPlaybackStatusIfNeeded(Playback::PAUSE, 0);
1345    }
1346
1347    // If currently buffering, post kWhatBufferingEnd first, so that
1348    // NuPlayer resumes. Otherwise, if cache hits high watermark
1349    // before new polling happens, no one will resume the playback.
1350    stopBufferingIfNecessary();
1351    restartPollBuffering();
1352
1353    return OK;
1354}
1355
1356sp<ABuffer> NuPlayer::GenericSource::mediaBufferToABuffer(
1357        MediaBuffer* mb,
1358        media_track_type trackType,
1359        int64_t /* seekTimeUs */,
1360        int64_t *actualTimeUs) {
1361    bool audio = trackType == MEDIA_TRACK_TYPE_AUDIO;
1362    size_t outLength = mb->range_length();
1363
1364    if (audio && mAudioIsVorbis) {
1365        outLength += sizeof(int32_t);
1366    }
1367
1368    sp<ABuffer> ab;
1369    if (mIsSecure && !audio) {
1370        // data is already provided in the buffer
1371        ab = new ABuffer(NULL, mb->range_length());
1372        mb->add_ref();
1373        ab->setMediaBufferBase(mb);
1374    } else {
1375        ab = new ABuffer(outLength);
1376        memcpy(ab->data(),
1377               (const uint8_t *)mb->data() + mb->range_offset(),
1378               mb->range_length());
1379    }
1380
1381    if (audio && mAudioIsVorbis) {
1382        int32_t numPageSamples;
1383        if (!mb->meta_data()->findInt32(kKeyValidSamples, &numPageSamples)) {
1384            numPageSamples = -1;
1385        }
1386
1387        uint8_t* abEnd = ab->data() + mb->range_length();
1388        memcpy(abEnd, &numPageSamples, sizeof(numPageSamples));
1389    }
1390
1391    sp<AMessage> meta = ab->meta();
1392
1393    int64_t timeUs;
1394    CHECK(mb->meta_data()->findInt64(kKeyTime, &timeUs));
1395    meta->setInt64("timeUs", timeUs);
1396
1397#if 0
1398    // Temporarily disable pre-roll till we have a full solution to handle
1399    // both single seek and continous seek gracefully.
1400    if (seekTimeUs > timeUs) {
1401        sp<AMessage> extra = new AMessage;
1402        extra->setInt64("resume-at-mediaTimeUs", seekTimeUs);
1403        meta->setMessage("extra", extra);
1404    }
1405#endif
1406
1407    if (trackType == MEDIA_TRACK_TYPE_TIMEDTEXT) {
1408        const char *mime;
1409        CHECK(mTimedTextTrack.mSource != NULL
1410                && mTimedTextTrack.mSource->getFormat()->findCString(kKeyMIMEType, &mime));
1411        meta->setString("mime", mime);
1412    }
1413
1414    int64_t durationUs;
1415    if (mb->meta_data()->findInt64(kKeyDuration, &durationUs)) {
1416        meta->setInt64("durationUs", durationUs);
1417    }
1418
1419    if (trackType == MEDIA_TRACK_TYPE_SUBTITLE) {
1420        meta->setInt32("trackIndex", mSubtitleTrack.mIndex);
1421    }
1422
1423    uint32_t dataType; // unused
1424    const void *seiData;
1425    size_t seiLength;
1426    if (mb->meta_data()->findData(kKeySEI, &dataType, &seiData, &seiLength)) {
1427        sp<ABuffer> sei = ABuffer::CreateAsCopy(seiData, seiLength);;
1428        meta->setBuffer("sei", sei);
1429    }
1430
1431    if (actualTimeUs) {
1432        *actualTimeUs = timeUs;
1433    }
1434
1435    mb->release();
1436    mb = NULL;
1437
1438    return ab;
1439}
1440
1441void NuPlayer::GenericSource::postReadBuffer(media_track_type trackType) {
1442    Mutex::Autolock _l(mReadBufferLock);
1443
1444    if ((mPendingReadBufferTypes & (1 << trackType)) == 0) {
1445        mPendingReadBufferTypes |= (1 << trackType);
1446        sp<AMessage> msg = new AMessage(kWhatReadBuffer, this);
1447        msg->setInt32("trackType", trackType);
1448        msg->post();
1449    }
1450}
1451
1452void NuPlayer::GenericSource::onReadBuffer(sp<AMessage> msg) {
1453    int32_t tmpType;
1454    CHECK(msg->findInt32("trackType", &tmpType));
1455    media_track_type trackType = (media_track_type)tmpType;
1456    readBuffer(trackType);
1457    {
1458        // only protect the variable change, as readBuffer may
1459        // take considerable time.
1460        Mutex::Autolock _l(mReadBufferLock);
1461        mPendingReadBufferTypes &= ~(1 << trackType);
1462    }
1463}
1464
1465void NuPlayer::GenericSource::readBuffer(
1466        media_track_type trackType, int64_t seekTimeUs, int64_t *actualTimeUs, bool formatChange) {
1467    // Do not read data if Widevine source is stopped
1468    if (mStopRead) {
1469        return;
1470    }
1471    Track *track;
1472    size_t maxBuffers = 1;
1473    switch (trackType) {
1474        case MEDIA_TRACK_TYPE_VIDEO:
1475            track = &mVideoTrack;
1476            if (mIsWidevine) {
1477                maxBuffers = 2;
1478            } else {
1479                maxBuffers = 4;
1480            }
1481            break;
1482        case MEDIA_TRACK_TYPE_AUDIO:
1483            track = &mAudioTrack;
1484            if (mIsWidevine) {
1485                maxBuffers = 8;
1486            } else {
1487                maxBuffers = 64;
1488            }
1489            break;
1490        case MEDIA_TRACK_TYPE_SUBTITLE:
1491            track = &mSubtitleTrack;
1492            break;
1493        case MEDIA_TRACK_TYPE_TIMEDTEXT:
1494            track = &mTimedTextTrack;
1495            break;
1496        default:
1497            TRESPASS();
1498    }
1499
1500    if (track->mSource == NULL) {
1501        return;
1502    }
1503
1504    if (actualTimeUs) {
1505        *actualTimeUs = seekTimeUs;
1506    }
1507
1508    MediaSource::ReadOptions options;
1509
1510    bool seeking = false;
1511
1512    if (seekTimeUs >= 0) {
1513        options.setSeekTo(seekTimeUs, MediaSource::ReadOptions::SEEK_PREVIOUS_SYNC);
1514        seeking = true;
1515    }
1516
1517    if (mIsWidevine) {
1518        options.setNonBlocking();
1519    }
1520
1521    for (size_t numBuffers = 0; numBuffers < maxBuffers; ) {
1522        MediaBuffer *mbuf;
1523        status_t err = track->mSource->read(&mbuf, &options);
1524
1525        options.clearSeekTo();
1526
1527        if (err == OK) {
1528            int64_t timeUs;
1529            CHECK(mbuf->meta_data()->findInt64(kKeyTime, &timeUs));
1530            if (trackType == MEDIA_TRACK_TYPE_AUDIO) {
1531                mAudioTimeUs = timeUs;
1532            } else if (trackType == MEDIA_TRACK_TYPE_VIDEO) {
1533                mVideoTimeUs = timeUs;
1534            }
1535
1536            queueDiscontinuityIfNeeded(seeking, formatChange, trackType, track);
1537
1538            sp<ABuffer> buffer = mediaBufferToABuffer(
1539                    mbuf, trackType, seekTimeUs,
1540                    numBuffers == 0 ? actualTimeUs : NULL);
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