GenericSource.cpp revision 2a3cc9a64330dd36e466fe5e1b634146f2d641c1 
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 "../../libstagefright/include/NuCachedSource2.h"
36#include "../../libstagefright/include/WVMExtractor.h"
37
38namespace android {
39
40NuPlayer::GenericSource::GenericSource(
41        const sp<AMessage> &notify,
42        bool uidValid,
43        uid_t uid)
44    : Source(notify),
45      mFetchSubtitleDataGeneration(0),
46      mFetchTimedTextDataGeneration(0),
47      mDurationUs(0ll),
48      mAudioIsVorbis(false),
49      mIsWidevine(false),
50      mUIDValid(uidValid),
51      mUID(uid),
52      mMetaDataSize(-1ll),
53      mBitrate(-1ll),
54      mPollBufferingGeneration(0) {
55    resetDataSource();
56    DataSource::RegisterDefaultSniffers();
57}
58
59void NuPlayer::GenericSource::resetDataSource() {
60    mHTTPService.clear();
61    mUri.clear();
62    mUriHeaders.clear();
63    mFd = -1;
64    mOffset = 0;
65    mLength = 0;
66}
67
68status_t NuPlayer::GenericSource::setDataSource(
69        const sp<IMediaHTTPService> &httpService,
70        const char *url,
71        const KeyedVector<String8, String8> *headers) {
72    resetDataSource();
73
74    mHTTPService = httpService;
75    mUri = url;
76
77    if (headers) {
78        mUriHeaders = *headers;
79    }
80
81    // delay data source creation to prepareAsync() to avoid blocking
82    // the calling thread in setDataSource for any significant time.
83    return OK;
84}
85
86status_t NuPlayer::GenericSource::setDataSource(
87        int fd, int64_t offset, int64_t length) {
88    resetDataSource();
89
90    mFd = dup(fd);
91    mOffset = offset;
92    mLength = length;
93
94    // delay data source creation to prepareAsync() to avoid blocking
95    // the calling thread in setDataSource for any significant time.
96    return OK;
97}
98
99status_t NuPlayer::GenericSource::initFromDataSource() {
100    sp<MediaExtractor> extractor;
101
102    CHECK(mDataSource != NULL);
103
104    if (mIsWidevine) {
105        String8 mimeType;
106        float confidence;
107        sp<AMessage> dummy;
108        bool success;
109
110        success = SniffWVM(mDataSource, &mimeType, &confidence, &dummy);
111        if (!success
112                || strcasecmp(
113                    mimeType.string(), MEDIA_MIMETYPE_CONTAINER_WVM)) {
114            ALOGE("unsupported widevine mime: %s", mimeType.string());
115            return UNKNOWN_ERROR;
116        }
117
118        mWVMExtractor = new WVMExtractor(mDataSource);
119        mWVMExtractor->setAdaptiveStreamingMode(true);
120        if (mUIDValid) {
121            mWVMExtractor->setUID(mUID);
122        }
123        extractor = mWVMExtractor;
124    } else {
125        extractor = MediaExtractor::Create(mDataSource,
126                mSniffedMIME.empty() ? NULL: mSniffedMIME.c_str());
127    }
128
129    if (extractor == NULL) {
130        return UNKNOWN_ERROR;
131    }
132
133    sp<MetaData> fileMeta = extractor->getMetaData();
134    if (fileMeta != NULL) {
135        int64_t duration;
136        if (fileMeta->findInt64(kKeyDuration, &duration)) {
137            mDurationUs = duration;
138        }
139    }
140
141    int32_t totalBitrate = 0;
142
143    for (size_t i = 0; i < extractor->countTracks(); ++i) {
144        sp<MetaData> meta = extractor->getTrackMetaData(i);
145
146        const char *mime;
147        CHECK(meta->findCString(kKeyMIMEType, &mime));
148
149        sp<MediaSource> track = extractor->getTrack(i);
150
151        if (!strncasecmp(mime, "audio/", 6)) {
152            if (mAudioTrack.mSource == NULL) {
153                mAudioTrack.mIndex = i;
154                mAudioTrack.mSource = track;
155
156                if (!strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_VORBIS)) {
157                    mAudioIsVorbis = true;
158                } else {
159                    mAudioIsVorbis = false;
160                }
161            }
162        } else if (!strncasecmp(mime, "video/", 6)) {
163            if (mVideoTrack.mSource == NULL) {
164                mVideoTrack.mIndex = i;
165                mVideoTrack.mSource = track;
166
167                // check if the source requires secure buffers
168                int32_t secure;
169                if (meta->findInt32(kKeyRequiresSecureBuffers, &secure)
170                        && secure) {
171                    mIsWidevine = true;
172                    if (mUIDValid) {
173                        extractor->setUID(mUID);
174                    }
175                }
176            }
177        }
178
179        if (track != NULL) {
180            mSources.push(track);
181            int64_t durationUs;
182            if (meta->findInt64(kKeyDuration, &durationUs)) {
183                if (durationUs > mDurationUs) {
184                    mDurationUs = durationUs;
185                }
186            }
187
188            int32_t bitrate;
189            if (totalBitrate >= 0 && meta->findInt32(kKeyBitRate, &bitrate)) {
190                totalBitrate += bitrate;
191            } else {
192                totalBitrate = -1;
193            }
194        }
195    }
196
197    mBitrate = totalBitrate;
198
199    return OK;
200}
201
202status_t NuPlayer::GenericSource::setBuffers(
203        bool audio, Vector<MediaBuffer *> &buffers) {
204    if (mIsWidevine && !audio) {
205        return mVideoTrack.mSource->setBuffers(buffers);
206    }
207    return INVALID_OPERATION;
208}
209
210NuPlayer::GenericSource::~GenericSource() {
211    if (mLooper != NULL) {
212        mLooper->unregisterHandler(id());
213        mLooper->stop();
214    }
215}
216
217void NuPlayer::GenericSource::prepareAsync() {
218    if (mLooper == NULL) {
219        mLooper = new ALooper;
220        mLooper->setName("generic");
221        mLooper->start();
222
223        mLooper->registerHandler(this);
224    }
225
226    sp<AMessage> msg = new AMessage(kWhatPrepareAsync, id());
227    msg->post();
228}
229
230void NuPlayer::GenericSource::onPrepareAsync() {
231    // delayed data source creation
232    if (mDataSource == NULL) {
233        if (!mUri.empty()) {
234            mIsWidevine = !strncasecmp(mUri.c_str(), "widevine://", 11);
235
236            mDataSource = DataSource::CreateFromURI(
237                   mHTTPService, mUri.c_str(), &mUriHeaders, &mContentType);
238        } else {
239            // set to false first, if the extractor
240            // comes back as secure, set it to true then.
241            mIsWidevine = false;
242
243            mDataSource = new FileSource(mFd, mOffset, mLength);
244        }
245
246        if (mDataSource == NULL) {
247            ALOGE("Failed to create data source!");
248            notifyPreparedAndCleanup(UNKNOWN_ERROR);
249            return;
250        }
251
252        if (mDataSource->flags() & DataSource::kIsCachingDataSource) {
253            mCachedSource = static_cast<NuCachedSource2 *>(mDataSource.get());
254        }
255
256        if (mIsWidevine || mCachedSource != NULL) {
257            schedulePollBuffering();
258        }
259    }
260
261    // check initial caching status
262    status_t err = prefillCacheIfNecessary();
263    if (err != OK) {
264        if (err == -EAGAIN) {
265            (new AMessage(kWhatPrepareAsync, id()))->post(200000);
266        } else {
267            ALOGE("Failed to prefill data cache!");
268            notifyPreparedAndCleanup(UNKNOWN_ERROR);
269        }
270        return;
271    }
272
273    // init extrator from data source
274    err = initFromDataSource();
275
276    if (err != OK) {
277        ALOGE("Failed to init from data source!");
278        notifyPreparedAndCleanup(err);
279        return;
280    }
281
282    if (mVideoTrack.mSource != NULL) {
283        notifyVideoSizeChanged(getFormat(false /* audio */));
284    }
285
286    notifyFlagsChanged(
287            (mIsWidevine ? FLAG_SECURE : 0)
288            | FLAG_CAN_PAUSE
289            | FLAG_CAN_SEEK_BACKWARD
290            | FLAG_CAN_SEEK_FORWARD
291            | FLAG_CAN_SEEK);
292
293    notifyPrepared();
294}
295
296void NuPlayer::GenericSource::notifyPreparedAndCleanup(status_t err) {
297    if (err != OK) {
298        mMetaDataSize = -1ll;
299        mContentType = "";
300        mSniffedMIME = "";
301        mDataSource.clear();
302        mCachedSource.clear();
303
304        cancelPollBuffering();
305    }
306    notifyPrepared(err);
307}
308
309status_t NuPlayer::GenericSource::prefillCacheIfNecessary() {
310    CHECK(mDataSource != NULL);
311
312    if (mCachedSource == NULL) {
313        // no prefill if the data source is not cached
314        return OK;
315    }
316
317    // We're not doing this for streams that appear to be audio-only
318    // streams to ensure that even low bandwidth streams start
319    // playing back fairly instantly.
320    if (!strncasecmp(mContentType.string(), "audio/", 6)) {
321        return OK;
322    }
323
324    // We're going to prefill the cache before trying to instantiate
325    // the extractor below, as the latter is an operation that otherwise
326    // could block on the datasource for a significant amount of time.
327    // During that time we'd be unable to abort the preparation phase
328    // without this prefill.
329
330    // Initially make sure we have at least 192 KB for the sniff
331    // to complete without blocking.
332    static const size_t kMinBytesForSniffing = 192 * 1024;
333    static const size_t kDefaultMetaSize = 200000;
334
335    status_t finalStatus;
336
337    size_t cachedDataRemaining =
338            mCachedSource->approxDataRemaining(&finalStatus);
339
340    if (finalStatus != OK || (mMetaDataSize >= 0
341            && (off64_t)cachedDataRemaining >= mMetaDataSize)) {
342        ALOGV("stop caching, status %d, "
343                "metaDataSize %lld, cachedDataRemaining %zu",
344                finalStatus, mMetaDataSize, cachedDataRemaining);
345        return OK;
346    }
347
348    ALOGV("now cached %zu bytes of data", cachedDataRemaining);
349
350    if (mMetaDataSize < 0
351            && cachedDataRemaining >= kMinBytesForSniffing) {
352        String8 tmp;
353        float confidence;
354        sp<AMessage> meta;
355        if (!mCachedSource->sniff(&tmp, &confidence, &meta)) {
356            return UNKNOWN_ERROR;
357        }
358
359        // We successfully identified the file's extractor to
360        // be, remember this mime type so we don't have to
361        // sniff it again when we call MediaExtractor::Create()
362        mSniffedMIME = tmp.string();
363
364        if (meta == NULL
365                || !meta->findInt64("meta-data-size",
366                        reinterpret_cast<int64_t*>(&mMetaDataSize))) {
367            mMetaDataSize = kDefaultMetaSize;
368        }
369
370        if (mMetaDataSize < 0ll) {
371            ALOGE("invalid metaDataSize = %lld bytes", mMetaDataSize);
372            return UNKNOWN_ERROR;
373        }
374    }
375
376    return -EAGAIN;
377}
378
379void NuPlayer::GenericSource::start() {
380    ALOGI("start");
381
382    if (mAudioTrack.mSource != NULL) {
383        CHECK_EQ(mAudioTrack.mSource->start(), (status_t)OK);
384        mAudioTrack.mPackets =
385            new AnotherPacketSource(mAudioTrack.mSource->getFormat());
386
387        readBuffer(MEDIA_TRACK_TYPE_AUDIO);
388    }
389
390    if (mVideoTrack.mSource != NULL) {
391        CHECK_EQ(mVideoTrack.mSource->start(), (status_t)OK);
392        mVideoTrack.mPackets =
393            new AnotherPacketSource(mVideoTrack.mSource->getFormat());
394
395        readBuffer(MEDIA_TRACK_TYPE_VIDEO);
396    }
397}
398
399status_t NuPlayer::GenericSource::feedMoreTSData() {
400    return OK;
401}
402
403void NuPlayer::GenericSource::schedulePollBuffering() {
404    sp<AMessage> msg = new AMessage(kWhatPollBuffering, id());
405    msg->setInt32("generation", mPollBufferingGeneration);
406    msg->post(1000000ll);
407}
408
409void NuPlayer::GenericSource::cancelPollBuffering() {
410    ++mPollBufferingGeneration;
411}
412
413void NuPlayer::GenericSource::notifyBufferingUpdate(int percentage) {
414    sp<AMessage> msg = dupNotify();
415    msg->setInt32("what", kWhatBufferingUpdate);
416    msg->setInt32("percentage", percentage);
417    msg->post();
418}
419
420void NuPlayer::GenericSource::onPollBuffering() {
421    status_t finalStatus = UNKNOWN_ERROR;
422    int64_t cachedDurationUs = 0ll;
423
424    if (mCachedSource != NULL) {
425        size_t cachedDataRemaining =
426                mCachedSource->approxDataRemaining(&finalStatus);
427
428        if (finalStatus == OK) {
429            off64_t size;
430            int64_t bitrate = 0ll;
431            if (mDurationUs > 0 && mCachedSource->getSize(&size) == OK) {
432                bitrate = size * 8000000ll / mDurationUs;
433            } else if (mBitrate > 0) {
434                bitrate = mBitrate;
435            }
436            if (bitrate > 0) {
437                cachedDurationUs = cachedDataRemaining * 8000000ll / bitrate;
438            }
439        }
440    } else if (mWVMExtractor != NULL) {
441        cachedDurationUs
442            = mWVMExtractor->getCachedDurationUs(&finalStatus);
443    }
444
445    if (finalStatus == ERROR_END_OF_STREAM) {
446        notifyBufferingUpdate(100);
447        cancelPollBuffering();
448        return;
449    } else if (cachedDurationUs > 0ll && mDurationUs > 0ll) {
450        int percentage = 100.0 * cachedDurationUs / mDurationUs;
451        if (percentage > 100) {
452            percentage = 100;
453        }
454
455        notifyBufferingUpdate(percentage);
456    }
457
458    schedulePollBuffering();
459}
460
461
462void NuPlayer::GenericSource::onMessageReceived(const sp<AMessage> &msg) {
463    switch (msg->what()) {
464      case kWhatPrepareAsync:
465      {
466          onPrepareAsync();
467          break;
468      }
469      case kWhatFetchSubtitleData:
470      {
471          fetchTextData(kWhatSendSubtitleData, MEDIA_TRACK_TYPE_SUBTITLE,
472                  mFetchSubtitleDataGeneration, mSubtitleTrack.mPackets, msg);
473          break;
474      }
475
476      case kWhatFetchTimedTextData:
477      {
478          fetchTextData(kWhatSendTimedTextData, MEDIA_TRACK_TYPE_TIMEDTEXT,
479                  mFetchTimedTextDataGeneration, mTimedTextTrack.mPackets, msg);
480          break;
481      }
482
483      case kWhatSendSubtitleData:
484      {
485          sendTextData(kWhatSubtitleData, MEDIA_TRACK_TYPE_SUBTITLE,
486                  mFetchSubtitleDataGeneration, mSubtitleTrack.mPackets, msg);
487          break;
488      }
489
490      case kWhatSendTimedTextData:
491      {
492          sendTextData(kWhatTimedTextData, MEDIA_TRACK_TYPE_TIMEDTEXT,
493                  mFetchTimedTextDataGeneration, mTimedTextTrack.mPackets, msg);
494          break;
495      }
496
497      case kWhatChangeAVSource:
498      {
499          int32_t trackIndex;
500          CHECK(msg->findInt32("trackIndex", &trackIndex));
501          const sp<MediaSource> source = mSources.itemAt(trackIndex);
502
503          Track* track;
504          const char *mime;
505          media_track_type trackType, counterpartType;
506          sp<MetaData> meta = source->getFormat();
507          meta->findCString(kKeyMIMEType, &mime);
508          if (!strncasecmp(mime, "audio/", 6)) {
509              track = &mAudioTrack;
510              trackType = MEDIA_TRACK_TYPE_AUDIO;
511              counterpartType = MEDIA_TRACK_TYPE_VIDEO;;
512          } else {
513              CHECK(!strncasecmp(mime, "video/", 6));
514              track = &mVideoTrack;
515              trackType = MEDIA_TRACK_TYPE_VIDEO;
516              counterpartType = MEDIA_TRACK_TYPE_AUDIO;;
517          }
518
519
520          if (track->mSource != NULL) {
521              track->mSource->stop();
522          }
523          track->mSource = source;
524          track->mSource->start();
525          track->mIndex = trackIndex;
526
527          status_t avail;
528          if (!track->mPackets->hasBufferAvailable(&avail)) {
529              // sync from other source
530              TRESPASS();
531              break;
532          }
533
534          int64_t timeUs, actualTimeUs;
535          const bool formatChange = true;
536          sp<AMessage> latestMeta = track->mPackets->getLatestEnqueuedMeta();
537          CHECK(latestMeta != NULL && latestMeta->findInt64("timeUs", &timeUs));
538          readBuffer(trackType, timeUs, &actualTimeUs, formatChange);
539          readBuffer(counterpartType, -1, NULL, formatChange);
540          ALOGV("timeUs %lld actualTimeUs %lld", timeUs, actualTimeUs);
541
542          break;
543      }
544      case kWhatPollBuffering:
545      {
546          int32_t generation;
547          CHECK(msg->findInt32("generation", &generation));
548          if (generation == mPollBufferingGeneration) {
549              onPollBuffering();
550          }
551          break;
552      }
553      default:
554          Source::onMessageReceived(msg);
555          break;
556    }
557}
558
559void NuPlayer::GenericSource::fetchTextData(
560        uint32_t sendWhat,
561        media_track_type type,
562        int32_t curGen,
563        sp<AnotherPacketSource> packets,
564        sp<AMessage> msg) {
565    int32_t msgGeneration;
566    CHECK(msg->findInt32("generation", &msgGeneration));
567    if (msgGeneration != curGen) {
568        // stale
569        return;
570    }
571
572    int32_t avail;
573    if (packets->hasBufferAvailable(&avail)) {
574        return;
575    }
576
577    int64_t timeUs;
578    CHECK(msg->findInt64("timeUs", &timeUs));
579
580    int64_t subTimeUs;
581    readBuffer(type, timeUs, &subTimeUs);
582
583    int64_t delayUs = subTimeUs - timeUs;
584    if (msg->what() == kWhatFetchSubtitleData) {
585        const int64_t oneSecUs = 1000000ll;
586        delayUs -= oneSecUs;
587    }
588    sp<AMessage> msg2 = new AMessage(sendWhat, id());
589    msg2->setInt32("generation", msgGeneration);
590    msg2->post(delayUs < 0 ? 0 : delayUs);
591}
592
593void NuPlayer::GenericSource::sendTextData(
594        uint32_t what,
595        media_track_type type,
596        int32_t curGen,
597        sp<AnotherPacketSource> packets,
598        sp<AMessage> msg) {
599    int32_t msgGeneration;
600    CHECK(msg->findInt32("generation", &msgGeneration));
601    if (msgGeneration != curGen) {
602        // stale
603        return;
604    }
605
606    int64_t subTimeUs;
607    if (packets->nextBufferTime(&subTimeUs) != OK) {
608        return;
609    }
610
611    int64_t nextSubTimeUs;
612    readBuffer(type, -1, &nextSubTimeUs);
613
614    sp<ABuffer> buffer;
615    status_t dequeueStatus = packets->dequeueAccessUnit(&buffer);
616    if (dequeueStatus == OK) {
617        sp<AMessage> notify = dupNotify();
618        notify->setInt32("what", what);
619        notify->setBuffer("buffer", buffer);
620        notify->post();
621
622        const int64_t delayUs = nextSubTimeUs - subTimeUs;
623        msg->post(delayUs < 0 ? 0 : delayUs);
624    }
625}
626
627sp<MetaData> NuPlayer::GenericSource::getFormatMeta(bool audio) {
628    sp<MediaSource> source = audio ? mAudioTrack.mSource : mVideoTrack.mSource;
629
630    if (source == NULL) {
631        return NULL;
632    }
633
634    return source->getFormat();
635}
636
637status_t NuPlayer::GenericSource::dequeueAccessUnit(
638        bool audio, sp<ABuffer> *accessUnit) {
639    Track *track = audio ? &mAudioTrack : &mVideoTrack;
640
641    if (track->mSource == NULL) {
642        return -EWOULDBLOCK;
643    }
644
645    if (mIsWidevine && !audio) {
646        // try to read a buffer as we may not have been able to the last time
647        readBuffer(MEDIA_TRACK_TYPE_VIDEO, -1ll);
648    }
649
650    status_t finalResult;
651    if (!track->mPackets->hasBufferAvailable(&finalResult)) {
652        return (finalResult == OK ? -EWOULDBLOCK : finalResult);
653    }
654
655    status_t result = track->mPackets->dequeueAccessUnit(accessUnit);
656
657    if (!track->mPackets->hasBufferAvailable(&finalResult)) {
658        readBuffer(audio? MEDIA_TRACK_TYPE_AUDIO : MEDIA_TRACK_TYPE_VIDEO, -1ll);
659    }
660
661    if (mSubtitleTrack.mSource == NULL && mTimedTextTrack.mSource == NULL) {
662        return result;
663    }
664
665    if (mSubtitleTrack.mSource != NULL) {
666        CHECK(mSubtitleTrack.mPackets != NULL);
667    }
668    if (mTimedTextTrack.mSource != NULL) {
669        CHECK(mTimedTextTrack.mPackets != NULL);
670    }
671
672    if (result != OK) {
673        if (mSubtitleTrack.mSource != NULL) {
674            mSubtitleTrack.mPackets->clear();
675            mFetchSubtitleDataGeneration++;
676        }
677        if (mTimedTextTrack.mSource != NULL) {
678            mTimedTextTrack.mPackets->clear();
679            mFetchTimedTextDataGeneration++;
680        }
681        return result;
682    }
683
684    int64_t timeUs;
685    status_t eosResult; // ignored
686    CHECK((*accessUnit)->meta()->findInt64("timeUs", &timeUs));
687
688    if (mSubtitleTrack.mSource != NULL
689            && !mSubtitleTrack.mPackets->hasBufferAvailable(&eosResult)) {
690        sp<AMessage> msg = new AMessage(kWhatFetchSubtitleData, id());
691        msg->setInt64("timeUs", timeUs);
692        msg->setInt32("generation", mFetchSubtitleDataGeneration);
693        msg->post();
694    }
695
696    if (mTimedTextTrack.mSource != NULL
697            && !mTimedTextTrack.mPackets->hasBufferAvailable(&eosResult)) {
698        sp<AMessage> msg = new AMessage(kWhatFetchTimedTextData, id());
699        msg->setInt64("timeUs", timeUs);
700        msg->setInt32("generation", mFetchTimedTextDataGeneration);
701        msg->post();
702    }
703
704    return result;
705}
706
707status_t NuPlayer::GenericSource::getDuration(int64_t *durationUs) {
708    *durationUs = mDurationUs;
709    return OK;
710}
711
712size_t NuPlayer::GenericSource::getTrackCount() const {
713    return mSources.size();
714}
715
716sp<AMessage> NuPlayer::GenericSource::getTrackInfo(size_t trackIndex) const {
717    size_t trackCount = mSources.size();
718    if (trackIndex >= trackCount) {
719        return NULL;
720    }
721
722    sp<AMessage> format = new AMessage();
723    sp<MetaData> meta = mSources.itemAt(trackIndex)->getFormat();
724
725    const char *mime;
726    CHECK(meta->findCString(kKeyMIMEType, &mime));
727
728    int32_t trackType;
729    if (!strncasecmp(mime, "video/", 6)) {
730        trackType = MEDIA_TRACK_TYPE_VIDEO;
731    } else if (!strncasecmp(mime, "audio/", 6)) {
732        trackType = MEDIA_TRACK_TYPE_AUDIO;
733    } else if (!strcasecmp(mime, MEDIA_MIMETYPE_TEXT_3GPP)) {
734        trackType = MEDIA_TRACK_TYPE_TIMEDTEXT;
735    } else {
736        trackType = MEDIA_TRACK_TYPE_UNKNOWN;
737    }
738    format->setInt32("type", trackType);
739
740    const char *lang;
741    if (!meta->findCString(kKeyMediaLanguage, &lang)) {
742        lang = "und";
743    }
744    format->setString("language", lang);
745
746    if (trackType == MEDIA_TRACK_TYPE_SUBTITLE) {
747        format->setString("mime", mime);
748
749        int32_t isAutoselect = 1, isDefault = 0, isForced = 0;
750        meta->findInt32(kKeyTrackIsAutoselect, &isAutoselect);
751        meta->findInt32(kKeyTrackIsDefault, &isDefault);
752        meta->findInt32(kKeyTrackIsForced, &isForced);
753
754        format->setInt32("auto", !!isAutoselect);
755        format->setInt32("default", !!isDefault);
756        format->setInt32("forced", !!isForced);
757    }
758
759    return format;
760}
761
762ssize_t NuPlayer::GenericSource::getSelectedTrack(media_track_type type) const {
763    const Track *track = NULL;
764    switch (type) {
765    case MEDIA_TRACK_TYPE_VIDEO:
766        track = &mVideoTrack;
767        break;
768    case MEDIA_TRACK_TYPE_AUDIO:
769        track = &mAudioTrack;
770        break;
771    case MEDIA_TRACK_TYPE_TIMEDTEXT:
772        track = &mTimedTextTrack;
773        break;
774    case MEDIA_TRACK_TYPE_SUBTITLE:
775        track = &mSubtitleTrack;
776        break;
777    default:
778        break;
779    }
780
781    if (track != NULL && track->mSource != NULL) {
782        return track->mIndex;
783    }
784
785    return -1;
786}
787
788status_t NuPlayer::GenericSource::selectTrack(size_t trackIndex, bool select) {
789    ALOGV("%s track: %zu", select ? "select" : "deselect", trackIndex);
790    if (trackIndex >= mSources.size()) {
791        return BAD_INDEX;
792    }
793
794    if (!select) {
795        Track* track = NULL;
796        if (mSubtitleTrack.mSource != NULL && trackIndex == mSubtitleTrack.mIndex) {
797            track = &mSubtitleTrack;
798            mFetchSubtitleDataGeneration++;
799        } else if (mTimedTextTrack.mSource != NULL && trackIndex == mTimedTextTrack.mIndex) {
800            track = &mTimedTextTrack;
801            mFetchTimedTextDataGeneration++;
802        }
803        if (track == NULL) {
804            return INVALID_OPERATION;
805        }
806        track->mSource->stop();
807        track->mSource = NULL;
808        track->mPackets->clear();
809        return OK;
810    }
811
812    const sp<MediaSource> source = mSources.itemAt(trackIndex);
813    sp<MetaData> meta = source->getFormat();
814    const char *mime;
815    CHECK(meta->findCString(kKeyMIMEType, &mime));
816    if (!strncasecmp(mime, "text/", 5)) {
817        bool isSubtitle = strcasecmp(mime, MEDIA_MIMETYPE_TEXT_3GPP);
818        Track *track = isSubtitle ? &mSubtitleTrack : &mTimedTextTrack;
819        if (track->mSource != NULL && track->mIndex == trackIndex) {
820            return OK;
821        }
822        track->mIndex = trackIndex;
823        if (track->mSource != NULL) {
824            track->mSource->stop();
825        }
826        track->mSource = mSources.itemAt(trackIndex);
827        track->mSource->start();
828        if (track->mPackets == NULL) {
829            track->mPackets = new AnotherPacketSource(track->mSource->getFormat());
830        } else {
831            track->mPackets->clear();
832            track->mPackets->setFormat(track->mSource->getFormat());
833
834        }
835
836        if (isSubtitle) {
837            mFetchSubtitleDataGeneration++;
838        } else {
839            mFetchTimedTextDataGeneration++;
840        }
841
842        return OK;
843    } else if (!strncasecmp(mime, "audio/", 6) || !strncasecmp(mime, "video/", 6)) {
844        bool audio = !strncasecmp(mime, "audio/", 6);
845        Track *track = audio ? &mAudioTrack : &mVideoTrack;
846        if (track->mSource != NULL && track->mIndex == trackIndex) {
847            return OK;
848        }
849
850        sp<AMessage> msg = new AMessage(kWhatChangeAVSource, id());
851        msg->setInt32("trackIndex", trackIndex);
852        msg->post();
853        return OK;
854    }
855
856    return INVALID_OPERATION;
857}
858
859status_t NuPlayer::GenericSource::seekTo(int64_t seekTimeUs) {
860    if (mVideoTrack.mSource != NULL) {
861        int64_t actualTimeUs;
862        readBuffer(MEDIA_TRACK_TYPE_VIDEO, seekTimeUs, &actualTimeUs);
863
864        seekTimeUs = actualTimeUs;
865    }
866
867    if (mAudioTrack.mSource != NULL) {
868        readBuffer(MEDIA_TRACK_TYPE_AUDIO, seekTimeUs);
869    }
870
871    return OK;
872}
873
874sp<ABuffer> NuPlayer::GenericSource::mediaBufferToABuffer(
875        MediaBuffer* mb,
876        media_track_type trackType,
877        int64_t *actualTimeUs) {
878    bool audio = trackType == MEDIA_TRACK_TYPE_AUDIO;
879    size_t outLength = mb->range_length();
880
881    if (audio && mAudioIsVorbis) {
882        outLength += sizeof(int32_t);
883    }
884
885    sp<ABuffer> ab;
886    if (mIsWidevine && !audio) {
887        // data is already provided in the buffer
888        ab = new ABuffer(NULL, mb->range_length());
889        ab->meta()->setPointer("mediaBuffer", mb);
890        mb->add_ref();
891    } else {
892        ab = new ABuffer(outLength);
893        memcpy(ab->data(),
894               (const uint8_t *)mb->data() + mb->range_offset(),
895               mb->range_length());
896    }
897
898    if (audio && mAudioIsVorbis) {
899        int32_t numPageSamples;
900        if (!mb->meta_data()->findInt32(kKeyValidSamples, &numPageSamples)) {
901            numPageSamples = -1;
902        }
903
904        uint8_t* abEnd = ab->data() + mb->range_length();
905        memcpy(abEnd, &numPageSamples, sizeof(numPageSamples));
906    }
907
908    sp<AMessage> meta = ab->meta();
909
910    int64_t timeUs;
911    CHECK(mb->meta_data()->findInt64(kKeyTime, &timeUs));
912    meta->setInt64("timeUs", timeUs);
913
914    if (trackType == MEDIA_TRACK_TYPE_TIMEDTEXT) {
915        const char *mime;
916        CHECK(mTimedTextTrack.mSource != NULL
917                && mTimedTextTrack.mSource->getFormat()->findCString(kKeyMIMEType, &mime));
918        meta->setString("mime", mime);
919    }
920
921    int64_t durationUs;
922    if (mb->meta_data()->findInt64(kKeyDuration, &durationUs)) {
923        meta->setInt64("durationUs", durationUs);
924    }
925
926    if (trackType == MEDIA_TRACK_TYPE_SUBTITLE) {
927        meta->setInt32("trackIndex", mSubtitleTrack.mIndex);
928    }
929
930    if (actualTimeUs) {
931        *actualTimeUs = timeUs;
932    }
933
934    mb->release();
935    mb = NULL;
936
937    return ab;
938}
939
940void NuPlayer::GenericSource::readBuffer(
941        media_track_type trackType, int64_t seekTimeUs, int64_t *actualTimeUs, bool formatChange) {
942    Track *track;
943    switch (trackType) {
944        case MEDIA_TRACK_TYPE_VIDEO:
945            track = &mVideoTrack;
946            break;
947        case MEDIA_TRACK_TYPE_AUDIO:
948            track = &mAudioTrack;
949            break;
950        case MEDIA_TRACK_TYPE_SUBTITLE:
951            track = &mSubtitleTrack;
952            break;
953        case MEDIA_TRACK_TYPE_TIMEDTEXT:
954            track = &mTimedTextTrack;
955            break;
956        default:
957            TRESPASS();
958    }
959
960    if (track->mSource == NULL) {
961        return;
962    }
963
964    if (actualTimeUs) {
965        *actualTimeUs = seekTimeUs;
966    }
967
968    MediaSource::ReadOptions options;
969
970    bool seeking = false;
971
972    if (seekTimeUs >= 0) {
973        options.setSeekTo(seekTimeUs, MediaSource::ReadOptions::SEEK_PREVIOUS_SYNC);
974        seeking = true;
975    }
976
977    if (mIsWidevine && trackType != MEDIA_TRACK_TYPE_AUDIO) {
978        options.setNonBlocking();
979    }
980
981    for (;;) {
982        MediaBuffer *mbuf;
983        status_t err = track->mSource->read(&mbuf, &options);
984
985        options.clearSeekTo();
986
987        if (err == OK) {
988            // formatChange && seeking: track whose source is changed during selection
989            // formatChange && !seeking: track whose source is not changed during selection
990            // !formatChange: normal seek
991            if ((seeking || formatChange)
992                    && (trackType == MEDIA_TRACK_TYPE_AUDIO
993                    || trackType == MEDIA_TRACK_TYPE_VIDEO)) {
994                ATSParser::DiscontinuityType type = formatChange
995                        ? (seeking
996                                ? ATSParser::DISCONTINUITY_FORMATCHANGE
997                                : ATSParser::DISCONTINUITY_NONE)
998                        : ATSParser::DISCONTINUITY_SEEK;
999                track->mPackets->queueDiscontinuity( type, NULL, true /* discard */);
1000            }
1001
1002            sp<ABuffer> buffer = mediaBufferToABuffer(mbuf, trackType, actualTimeUs);
1003            track->mPackets->queueAccessUnit(buffer);
1004            break;
1005        } else if (err == WOULD_BLOCK) {
1006            break;
1007        } else if (err == INFO_FORMAT_CHANGED) {
1008#if 0
1009            track->mPackets->queueDiscontinuity(
1010                    ATSParser::DISCONTINUITY_FORMATCHANGE,
1011                    NULL,
1012                    false /* discard */);
1013#endif
1014        } else {
1015            track->mPackets->signalEOS(err);
1016            break;
1017        }
1018    }
1019}
1020
1021}  // namespace android
1022