GenericSource.cpp revision 96e92b58b7e9647b4c7c2f54b62a1b357ab06b66 
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
40namespace android {
41
42NuPlayer::GenericSource::GenericSource(
43        const sp<AMessage> &notify,
44        bool uidValid,
45        uid_t uid)
46    : Source(notify),
47      mFetchSubtitleDataGeneration(0),
48      mFetchTimedTextDataGeneration(0),
49      mDurationUs(0ll),
50      mAudioIsVorbis(false),
51      mIsWidevine(false),
52      mUIDValid(uidValid),
53      mUID(uid),
54      mDrmManagerClient(NULL),
55      mMetaDataSize(-1ll),
56      mBitrate(-1ll),
57      mPollBufferingGeneration(0),
58      mPendingReadBufferTypes(0) {
59    resetDataSource();
60    DataSource::RegisterDefaultSniffers();
61}
62
63void NuPlayer::GenericSource::resetDataSource() {
64    mAudioTimeUs = 0;
65    mVideoTimeUs = 0;
66    mHTTPService.clear();
67    mUri.clear();
68    mUriHeaders.clear();
69    mFd = -1;
70    mOffset = 0;
71    mLength = 0;
72    setDrmPlaybackStatusIfNeeded(Playback::STOP, 0);
73    mDecryptHandle = NULL;
74    mDrmManagerClient = NULL;
75    mStarted = false;
76}
77
78status_t NuPlayer::GenericSource::setDataSource(
79        const sp<IMediaHTTPService> &httpService,
80        const char *url,
81        const KeyedVector<String8, String8> *headers) {
82    resetDataSource();
83
84    mHTTPService = httpService;
85    mUri = url;
86
87    if (headers) {
88        mUriHeaders = *headers;
89    }
90
91    // delay data source creation to prepareAsync() to avoid blocking
92    // the calling thread in setDataSource for any significant time.
93    return OK;
94}
95
96status_t NuPlayer::GenericSource::setDataSource(
97        int fd, int64_t offset, int64_t length) {
98    resetDataSource();
99
100    mFd = dup(fd);
101    mOffset = offset;
102    mLength = length;
103
104    // delay data source creation to prepareAsync() to avoid blocking
105    // the calling thread in setDataSource for any significant time.
106    return OK;
107}
108
109status_t NuPlayer::GenericSource::initFromDataSource() {
110    sp<MediaExtractor> extractor;
111
112    CHECK(mDataSource != NULL);
113
114    if (mIsWidevine) {
115        String8 mimeType;
116        float confidence;
117        sp<AMessage> dummy;
118        bool success;
119
120        success = SniffWVM(mDataSource, &mimeType, &confidence, &dummy);
121        if (!success
122                || strcasecmp(
123                    mimeType.string(), MEDIA_MIMETYPE_CONTAINER_WVM)) {
124            ALOGE("unsupported widevine mime: %s", mimeType.string());
125            return UNKNOWN_ERROR;
126        }
127
128        mWVMExtractor = new WVMExtractor(mDataSource);
129        mWVMExtractor->setAdaptiveStreamingMode(true);
130        if (mUIDValid) {
131            mWVMExtractor->setUID(mUID);
132        }
133        extractor = mWVMExtractor;
134    } else {
135        extractor = MediaExtractor::Create(mDataSource,
136                mSniffedMIME.empty() ? NULL: mSniffedMIME.c_str());
137    }
138
139    if (extractor == NULL) {
140        return UNKNOWN_ERROR;
141    }
142
143    if (extractor->getDrmFlag()) {
144        checkDrmStatus(mDataSource);
145    }
146
147    sp<MetaData> fileMeta = extractor->getMetaData();
148    if (fileMeta != NULL) {
149        int64_t duration;
150        if (fileMeta->findInt64(kKeyDuration, &duration)) {
151            mDurationUs = duration;
152        }
153    }
154
155    int32_t totalBitrate = 0;
156
157    for (size_t i = 0; i < extractor->countTracks(); ++i) {
158        sp<MediaSource> track = extractor->getTrack(i);
159
160        sp<MetaData> meta = extractor->getTrackMetaData(i);
161
162        const char *mime;
163        CHECK(meta->findCString(kKeyMIMEType, &mime));
164
165        // Do the string compare immediately with "mime",
166        // we can't assume "mime" would stay valid after another
167        // extractor operation, some extractors might modify meta
168        // during getTrack() and make it invalid.
169        if (!strncasecmp(mime, "audio/", 6)) {
170            if (mAudioTrack.mSource == NULL) {
171                mAudioTrack.mIndex = i;
172                mAudioTrack.mSource = track;
173                mAudioTrack.mPackets =
174                    new AnotherPacketSource(mAudioTrack.mSource->getFormat());
175
176                if (!strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_VORBIS)) {
177                    mAudioIsVorbis = true;
178                } else {
179                    mAudioIsVorbis = false;
180                }
181            }
182        } else if (!strncasecmp(mime, "video/", 6)) {
183            if (mVideoTrack.mSource == NULL) {
184                mVideoTrack.mIndex = i;
185                mVideoTrack.mSource = track;
186                mVideoTrack.mPackets =
187                    new AnotherPacketSource(mVideoTrack.mSource->getFormat());
188
189                // check if the source requires secure buffers
190                int32_t secure;
191                if (meta->findInt32(kKeyRequiresSecureBuffers, &secure)
192                        && secure) {
193                    mIsWidevine = true;
194                    if (mUIDValid) {
195                        extractor->setUID(mUID);
196                    }
197                }
198            }
199        }
200
201        if (track != NULL) {
202            mSources.push(track);
203            int64_t durationUs;
204            if (meta->findInt64(kKeyDuration, &durationUs)) {
205                if (durationUs > mDurationUs) {
206                    mDurationUs = durationUs;
207                }
208            }
209
210            int32_t bitrate;
211            if (totalBitrate >= 0 && meta->findInt32(kKeyBitRate, &bitrate)) {
212                totalBitrate += bitrate;
213            } else {
214                totalBitrate = -1;
215            }
216        }
217    }
218
219    mBitrate = totalBitrate;
220
221    return OK;
222}
223
224void NuPlayer::GenericSource::checkDrmStatus(const sp<DataSource>& dataSource) {
225    dataSource->getDrmInfo(mDecryptHandle, &mDrmManagerClient);
226    if (mDecryptHandle != NULL) {
227        CHECK(mDrmManagerClient);
228        if (RightsStatus::RIGHTS_VALID != mDecryptHandle->status) {
229            sp<AMessage> msg = dupNotify();
230            msg->setInt32("what", kWhatDrmNoLicense);
231            msg->post();
232        }
233    }
234}
235
236int64_t NuPlayer::GenericSource::getLastReadPosition() {
237    if (mAudioTrack.mSource != NULL) {
238        return mAudioTimeUs;
239    } else if (mVideoTrack.mSource != NULL) {
240        return mVideoTimeUs;
241    } else {
242        return 0;
243    }
244}
245
246status_t NuPlayer::GenericSource::setBuffers(
247        bool audio, Vector<MediaBuffer *> &buffers) {
248    if (mIsWidevine && !audio) {
249        return mVideoTrack.mSource->setBuffers(buffers);
250    }
251    return INVALID_OPERATION;
252}
253
254NuPlayer::GenericSource::~GenericSource() {
255    if (mLooper != NULL) {
256        mLooper->unregisterHandler(id());
257        mLooper->stop();
258    }
259}
260
261void NuPlayer::GenericSource::prepareAsync() {
262    if (mLooper == NULL) {
263        mLooper = new ALooper;
264        mLooper->setName("generic");
265        mLooper->start();
266
267        mLooper->registerHandler(this);
268    }
269
270    sp<AMessage> msg = new AMessage(kWhatPrepareAsync, id());
271    msg->post();
272}
273
274void NuPlayer::GenericSource::onPrepareAsync() {
275    // delayed data source creation
276    if (mDataSource == NULL) {
277        if (!mUri.empty()) {
278            mIsWidevine = !strncasecmp(mUri.c_str(), "widevine://", 11);
279
280            mDataSource = DataSource::CreateFromURI(
281                   mHTTPService, mUri.c_str(), &mUriHeaders, &mContentType);
282        } else {
283            // set to false first, if the extractor
284            // comes back as secure, set it to true then.
285            mIsWidevine = false;
286
287            mDataSource = new FileSource(mFd, mOffset, mLength);
288        }
289
290        if (mDataSource == NULL) {
291            ALOGE("Failed to create data source!");
292            notifyPreparedAndCleanup(UNKNOWN_ERROR);
293            return;
294        }
295
296        if (mDataSource->flags() & DataSource::kIsCachingDataSource) {
297            mCachedSource = static_cast<NuCachedSource2 *>(mDataSource.get());
298        }
299
300        if (mIsWidevine || mCachedSource != NULL) {
301            schedulePollBuffering();
302        }
303    }
304
305    // check initial caching status
306    status_t err = prefillCacheIfNecessary();
307    if (err != OK) {
308        if (err == -EAGAIN) {
309            (new AMessage(kWhatPrepareAsync, id()))->post(200000);
310        } else {
311            ALOGE("Failed to prefill data cache!");
312            notifyPreparedAndCleanup(UNKNOWN_ERROR);
313        }
314        return;
315    }
316
317    // init extrator from data source
318    err = initFromDataSource();
319
320    if (err != OK) {
321        ALOGE("Failed to init from data source!");
322        notifyPreparedAndCleanup(err);
323        return;
324    }
325
326    if (mVideoTrack.mSource != NULL) {
327        sp<MetaData> meta = doGetFormatMeta(false /* audio */);
328        sp<AMessage> msg = new AMessage;
329        err = convertMetaDataToMessage(meta, &msg);
330        if(err != OK) {
331            notifyPreparedAndCleanup(err);
332            return;
333        }
334        notifyVideoSizeChanged(msg);
335    }
336
337    notifyFlagsChanged(
338            (mIsWidevine ? FLAG_SECURE : 0)
339            | FLAG_CAN_PAUSE
340            | FLAG_CAN_SEEK_BACKWARD
341            | FLAG_CAN_SEEK_FORWARD
342            | FLAG_CAN_SEEK);
343
344    notifyPrepared();
345}
346
347void NuPlayer::GenericSource::notifyPreparedAndCleanup(status_t err) {
348    if (err != OK) {
349        mMetaDataSize = -1ll;
350        mContentType = "";
351        mSniffedMIME = "";
352        mDataSource.clear();
353        mCachedSource.clear();
354
355        cancelPollBuffering();
356    }
357    notifyPrepared(err);
358}
359
360status_t NuPlayer::GenericSource::prefillCacheIfNecessary() {
361    CHECK(mDataSource != NULL);
362
363    if (mCachedSource == NULL) {
364        // no prefill if the data source is not cached
365        return OK;
366    }
367
368    // We're not doing this for streams that appear to be audio-only
369    // streams to ensure that even low bandwidth streams start
370    // playing back fairly instantly.
371    if (!strncasecmp(mContentType.string(), "audio/", 6)) {
372        return OK;
373    }
374
375    // We're going to prefill the cache before trying to instantiate
376    // the extractor below, as the latter is an operation that otherwise
377    // could block on the datasource for a significant amount of time.
378    // During that time we'd be unable to abort the preparation phase
379    // without this prefill.
380
381    // Initially make sure we have at least 192 KB for the sniff
382    // to complete without blocking.
383    static const size_t kMinBytesForSniffing = 192 * 1024;
384    static const size_t kDefaultMetaSize = 200000;
385
386    status_t finalStatus;
387
388    size_t cachedDataRemaining =
389            mCachedSource->approxDataRemaining(&finalStatus);
390
391    if (finalStatus != OK || (mMetaDataSize >= 0
392            && (off64_t)cachedDataRemaining >= mMetaDataSize)) {
393        ALOGV("stop caching, status %d, "
394                "metaDataSize %lld, cachedDataRemaining %zu",
395                finalStatus, mMetaDataSize, cachedDataRemaining);
396        return OK;
397    }
398
399    ALOGV("now cached %zu bytes of data", cachedDataRemaining);
400
401    if (mMetaDataSize < 0
402            && cachedDataRemaining >= kMinBytesForSniffing) {
403        String8 tmp;
404        float confidence;
405        sp<AMessage> meta;
406        if (!mCachedSource->sniff(&tmp, &confidence, &meta)) {
407            return UNKNOWN_ERROR;
408        }
409
410        // We successfully identified the file's extractor to
411        // be, remember this mime type so we don't have to
412        // sniff it again when we call MediaExtractor::Create()
413        mSniffedMIME = tmp.string();
414
415        if (meta == NULL
416                || !meta->findInt64("meta-data-size",
417                        reinterpret_cast<int64_t*>(&mMetaDataSize))) {
418            mMetaDataSize = kDefaultMetaSize;
419        }
420
421        if (mMetaDataSize < 0ll) {
422            ALOGE("invalid metaDataSize = %lld bytes", mMetaDataSize);
423            return UNKNOWN_ERROR;
424        }
425    }
426
427    return -EAGAIN;
428}
429
430void NuPlayer::GenericSource::start() {
431    ALOGI("start");
432
433    if (mAudioTrack.mSource != NULL) {
434        CHECK_EQ(mAudioTrack.mSource->start(), (status_t)OK);
435
436        postReadBuffer(MEDIA_TRACK_TYPE_AUDIO);
437    }
438
439    if (mVideoTrack.mSource != NULL) {
440        CHECK_EQ(mVideoTrack.mSource->start(), (status_t)OK);
441
442        postReadBuffer(MEDIA_TRACK_TYPE_VIDEO);
443    }
444
445    setDrmPlaybackStatusIfNeeded(Playback::START, getLastReadPosition() / 1000);
446    mStarted = true;
447}
448
449void NuPlayer::GenericSource::stop() {
450    // nothing to do, just account for DRM playback status
451    setDrmPlaybackStatusIfNeeded(Playback::STOP, 0);
452    mStarted = false;
453}
454
455void NuPlayer::GenericSource::pause() {
456    // nothing to do, just account for DRM playback status
457    setDrmPlaybackStatusIfNeeded(Playback::PAUSE, 0);
458    mStarted = false;
459}
460
461void NuPlayer::GenericSource::resume() {
462    // nothing to do, just account for DRM playback status
463    setDrmPlaybackStatusIfNeeded(Playback::START, getLastReadPosition() / 1000);
464    mStarted = true;
465}
466
467void NuPlayer::GenericSource::setDrmPlaybackStatusIfNeeded(int playbackStatus, int64_t position) {
468    if (mDecryptHandle != NULL) {
469        mDrmManagerClient->setPlaybackStatus(mDecryptHandle, playbackStatus, position);
470    }
471    mSubtitleTrack.mPackets = new AnotherPacketSource(NULL);
472    mTimedTextTrack.mPackets = new AnotherPacketSource(NULL);
473}
474
475status_t NuPlayer::GenericSource::feedMoreTSData() {
476    return OK;
477}
478
479void NuPlayer::GenericSource::schedulePollBuffering() {
480    sp<AMessage> msg = new AMessage(kWhatPollBuffering, id());
481    msg->setInt32("generation", mPollBufferingGeneration);
482    msg->post(1000000ll);
483}
484
485void NuPlayer::GenericSource::cancelPollBuffering() {
486    ++mPollBufferingGeneration;
487}
488
489void NuPlayer::GenericSource::notifyBufferingUpdate(int percentage) {
490    sp<AMessage> msg = dupNotify();
491    msg->setInt32("what", kWhatBufferingUpdate);
492    msg->setInt32("percentage", percentage);
493    msg->post();
494}
495
496void NuPlayer::GenericSource::onPollBuffering() {
497    status_t finalStatus = UNKNOWN_ERROR;
498    int64_t cachedDurationUs = 0ll;
499
500    if (mCachedSource != NULL) {
501        size_t cachedDataRemaining =
502                mCachedSource->approxDataRemaining(&finalStatus);
503
504        if (finalStatus == OK) {
505            off64_t size;
506            int64_t bitrate = 0ll;
507            if (mDurationUs > 0 && mCachedSource->getSize(&size) == OK) {
508                bitrate = size * 8000000ll / mDurationUs;
509            } else if (mBitrate > 0) {
510                bitrate = mBitrate;
511            }
512            if (bitrate > 0) {
513                cachedDurationUs = cachedDataRemaining * 8000000ll / bitrate;
514            }
515        }
516    } else if (mWVMExtractor != NULL) {
517        cachedDurationUs
518            = mWVMExtractor->getCachedDurationUs(&finalStatus);
519    }
520
521    if (finalStatus == ERROR_END_OF_STREAM) {
522        notifyBufferingUpdate(100);
523        cancelPollBuffering();
524        return;
525    } else if (cachedDurationUs > 0ll && mDurationUs > 0ll) {
526        int percentage = 100.0 * cachedDurationUs / mDurationUs;
527        if (percentage > 100) {
528            percentage = 100;
529        }
530
531        notifyBufferingUpdate(percentage);
532    }
533
534    schedulePollBuffering();
535}
536
537
538void NuPlayer::GenericSource::onMessageReceived(const sp<AMessage> &msg) {
539    switch (msg->what()) {
540      case kWhatPrepareAsync:
541      {
542          onPrepareAsync();
543          break;
544      }
545      case kWhatFetchSubtitleData:
546      {
547          fetchTextData(kWhatSendSubtitleData, MEDIA_TRACK_TYPE_SUBTITLE,
548                  mFetchSubtitleDataGeneration, mSubtitleTrack.mPackets, msg);
549          break;
550      }
551
552      case kWhatFetchTimedTextData:
553      {
554          fetchTextData(kWhatSendTimedTextData, MEDIA_TRACK_TYPE_TIMEDTEXT,
555                  mFetchTimedTextDataGeneration, mTimedTextTrack.mPackets, msg);
556          break;
557      }
558
559      case kWhatSendSubtitleData:
560      {
561          sendTextData(kWhatSubtitleData, MEDIA_TRACK_TYPE_SUBTITLE,
562                  mFetchSubtitleDataGeneration, mSubtitleTrack.mPackets, msg);
563          break;
564      }
565
566      case kWhatSendTimedTextData:
567      {
568          sendTextData(kWhatTimedTextData, MEDIA_TRACK_TYPE_TIMEDTEXT,
569                  mFetchTimedTextDataGeneration, mTimedTextTrack.mPackets, msg);
570          break;
571      }
572
573      case kWhatChangeAVSource:
574      {
575          int32_t trackIndex;
576          CHECK(msg->findInt32("trackIndex", &trackIndex));
577          const sp<MediaSource> source = mSources.itemAt(trackIndex);
578
579          Track* track;
580          const char *mime;
581          media_track_type trackType, counterpartType;
582          sp<MetaData> meta = source->getFormat();
583          meta->findCString(kKeyMIMEType, &mime);
584          if (!strncasecmp(mime, "audio/", 6)) {
585              track = &mAudioTrack;
586              trackType = MEDIA_TRACK_TYPE_AUDIO;
587              counterpartType = MEDIA_TRACK_TYPE_VIDEO;;
588          } else {
589              CHECK(!strncasecmp(mime, "video/", 6));
590              track = &mVideoTrack;
591              trackType = MEDIA_TRACK_TYPE_VIDEO;
592              counterpartType = MEDIA_TRACK_TYPE_AUDIO;;
593          }
594
595
596          if (track->mSource != NULL) {
597              track->mSource->stop();
598          }
599          track->mSource = source;
600          track->mSource->start();
601          track->mIndex = trackIndex;
602
603          status_t avail;
604          if (!track->mPackets->hasBufferAvailable(&avail)) {
605              // sync from other source
606              TRESPASS();
607              break;
608          }
609
610          int64_t timeUs, actualTimeUs;
611          const bool formatChange = true;
612          sp<AMessage> latestMeta = track->mPackets->getLatestEnqueuedMeta();
613          CHECK(latestMeta != NULL && latestMeta->findInt64("timeUs", &timeUs));
614          readBuffer(trackType, timeUs, &actualTimeUs, formatChange);
615          readBuffer(counterpartType, -1, NULL, formatChange);
616          ALOGV("timeUs %lld actualTimeUs %lld", timeUs, actualTimeUs);
617
618          break;
619      }
620      case kWhatPollBuffering:
621      {
622          int32_t generation;
623          CHECK(msg->findInt32("generation", &generation));
624          if (generation == mPollBufferingGeneration) {
625              onPollBuffering();
626          }
627          break;
628      }
629
630      case kWhatGetFormat:
631      {
632          onGetFormatMeta(msg);
633          break;
634      }
635
636      case kWhatGetSelectedTrack:
637      {
638          onGetSelectedTrack(msg);
639          break;
640      }
641
642      case kWhatSelectTrack:
643      {
644          onSelectTrack(msg);
645          break;
646      }
647
648      case kWhatSeek:
649      {
650          onSeek(msg);
651          break;
652      }
653
654      case kWhatReadBuffer:
655      {
656          onReadBuffer(msg);
657          break;
658      }
659
660      default:
661          Source::onMessageReceived(msg);
662          break;
663    }
664}
665
666void NuPlayer::GenericSource::fetchTextData(
667        uint32_t sendWhat,
668        media_track_type type,
669        int32_t curGen,
670        sp<AnotherPacketSource> packets,
671        sp<AMessage> msg) {
672    int32_t msgGeneration;
673    CHECK(msg->findInt32("generation", &msgGeneration));
674    if (msgGeneration != curGen) {
675        // stale
676        return;
677    }
678
679    int32_t avail;
680    if (packets->hasBufferAvailable(&avail)) {
681        return;
682    }
683
684    int64_t timeUs;
685    CHECK(msg->findInt64("timeUs", &timeUs));
686
687    int64_t subTimeUs;
688    readBuffer(type, timeUs, &subTimeUs);
689
690    int64_t delayUs = subTimeUs - timeUs;
691    if (msg->what() == kWhatFetchSubtitleData) {
692        const int64_t oneSecUs = 1000000ll;
693        delayUs -= oneSecUs;
694    }
695    sp<AMessage> msg2 = new AMessage(sendWhat, id());
696    msg2->setInt32("generation", msgGeneration);
697    msg2->post(delayUs < 0 ? 0 : delayUs);
698}
699
700void NuPlayer::GenericSource::sendTextData(
701        uint32_t what,
702        media_track_type type,
703        int32_t curGen,
704        sp<AnotherPacketSource> packets,
705        sp<AMessage> msg) {
706    int32_t msgGeneration;
707    CHECK(msg->findInt32("generation", &msgGeneration));
708    if (msgGeneration != curGen) {
709        // stale
710        return;
711    }
712
713    int64_t subTimeUs;
714    if (packets->nextBufferTime(&subTimeUs) != OK) {
715        return;
716    }
717
718    int64_t nextSubTimeUs;
719    readBuffer(type, -1, &nextSubTimeUs);
720
721    sp<ABuffer> buffer;
722    status_t dequeueStatus = packets->dequeueAccessUnit(&buffer);
723    if (dequeueStatus == OK) {
724        sp<AMessage> notify = dupNotify();
725        notify->setInt32("what", what);
726        notify->setBuffer("buffer", buffer);
727        notify->post();
728
729        const int64_t delayUs = nextSubTimeUs - subTimeUs;
730        msg->post(delayUs < 0 ? 0 : delayUs);
731    }
732}
733
734sp<MetaData> NuPlayer::GenericSource::getFormatMeta(bool audio) {
735    sp<AMessage> msg = new AMessage(kWhatGetFormat, id());
736    msg->setInt32("audio", audio);
737
738    sp<AMessage> response;
739    void *format;
740    status_t err = msg->postAndAwaitResponse(&response);
741    if (err == OK && response != NULL) {
742        CHECK(response->findPointer("format", &format));
743        return (MetaData *)format;
744    } else {
745        return NULL;
746    }
747}
748
749void NuPlayer::GenericSource::onGetFormatMeta(sp<AMessage> msg) const {
750    int32_t audio;
751    CHECK(msg->findInt32("audio", &audio));
752
753    sp<AMessage> response = new AMessage;
754    sp<MetaData> format = doGetFormatMeta(audio);
755    response->setPointer("format", format.get());
756
757    uint32_t replyID;
758    CHECK(msg->senderAwaitsResponse(&replyID));
759    response->postReply(replyID);
760}
761
762sp<MetaData> NuPlayer::GenericSource::doGetFormatMeta(bool audio) const {
763    sp<MediaSource> source = audio ? mAudioTrack.mSource : mVideoTrack.mSource;
764
765    if (source == NULL) {
766        return NULL;
767    }
768
769    return source->getFormat();
770}
771
772status_t NuPlayer::GenericSource::dequeueAccessUnit(
773        bool audio, sp<ABuffer> *accessUnit) {
774    Track *track = audio ? &mAudioTrack : &mVideoTrack;
775
776    if (track->mSource == NULL) {
777        return -EWOULDBLOCK;
778    }
779
780    if (mIsWidevine && !audio) {
781        // try to read a buffer as we may not have been able to the last time
782        postReadBuffer(MEDIA_TRACK_TYPE_VIDEO);
783    }
784
785    status_t finalResult;
786    if (!track->mPackets->hasBufferAvailable(&finalResult)) {
787        return (finalResult == OK ? -EWOULDBLOCK : finalResult);
788    }
789
790    status_t result = track->mPackets->dequeueAccessUnit(accessUnit);
791
792    if (!track->mPackets->hasBufferAvailable(&finalResult)) {
793        postReadBuffer(audio? MEDIA_TRACK_TYPE_AUDIO : MEDIA_TRACK_TYPE_VIDEO);
794    }
795
796    if (result != OK) {
797        if (mSubtitleTrack.mSource != NULL) {
798            mSubtitleTrack.mPackets->clear();
799            mFetchSubtitleDataGeneration++;
800        }
801        if (mTimedTextTrack.mSource != NULL) {
802            mTimedTextTrack.mPackets->clear();
803            mFetchTimedTextDataGeneration++;
804        }
805        return result;
806    }
807
808    int64_t timeUs;
809    status_t eosResult; // ignored
810    CHECK((*accessUnit)->meta()->findInt64("timeUs", &timeUs));
811
812    if (mSubtitleTrack.mSource != NULL
813            && !mSubtitleTrack.mPackets->hasBufferAvailable(&eosResult)) {
814        sp<AMessage> msg = new AMessage(kWhatFetchSubtitleData, id());
815        msg->setInt64("timeUs", timeUs);
816        msg->setInt32("generation", mFetchSubtitleDataGeneration);
817        msg->post();
818    }
819
820    if (mTimedTextTrack.mSource != NULL
821            && !mTimedTextTrack.mPackets->hasBufferAvailable(&eosResult)) {
822        sp<AMessage> msg = new AMessage(kWhatFetchTimedTextData, id());
823        msg->setInt64("timeUs", timeUs);
824        msg->setInt32("generation", mFetchTimedTextDataGeneration);
825        msg->post();
826    }
827
828    return result;
829}
830
831status_t NuPlayer::GenericSource::getDuration(int64_t *durationUs) {
832    *durationUs = mDurationUs;
833    return OK;
834}
835
836size_t NuPlayer::GenericSource::getTrackCount() const {
837    return mSources.size();
838}
839
840sp<AMessage> NuPlayer::GenericSource::getTrackInfo(size_t trackIndex) const {
841    size_t trackCount = mSources.size();
842    if (trackIndex >= trackCount) {
843        return NULL;
844    }
845
846    sp<AMessage> format = new AMessage();
847    sp<MetaData> meta = mSources.itemAt(trackIndex)->getFormat();
848
849    const char *mime;
850    CHECK(meta->findCString(kKeyMIMEType, &mime));
851
852    int32_t trackType;
853    if (!strncasecmp(mime, "video/", 6)) {
854        trackType = MEDIA_TRACK_TYPE_VIDEO;
855    } else if (!strncasecmp(mime, "audio/", 6)) {
856        trackType = MEDIA_TRACK_TYPE_AUDIO;
857    } else if (!strcasecmp(mime, MEDIA_MIMETYPE_TEXT_3GPP)) {
858        trackType = MEDIA_TRACK_TYPE_TIMEDTEXT;
859    } else {
860        trackType = MEDIA_TRACK_TYPE_UNKNOWN;
861    }
862    format->setInt32("type", trackType);
863
864    const char *lang;
865    if (!meta->findCString(kKeyMediaLanguage, &lang)) {
866        lang = "und";
867    }
868    format->setString("language", lang);
869
870    if (trackType == MEDIA_TRACK_TYPE_SUBTITLE) {
871        format->setString("mime", mime);
872
873        int32_t isAutoselect = 1, isDefault = 0, isForced = 0;
874        meta->findInt32(kKeyTrackIsAutoselect, &isAutoselect);
875        meta->findInt32(kKeyTrackIsDefault, &isDefault);
876        meta->findInt32(kKeyTrackIsForced, &isForced);
877
878        format->setInt32("auto", !!isAutoselect);
879        format->setInt32("default", !!isDefault);
880        format->setInt32("forced", !!isForced);
881    }
882
883    return format;
884}
885
886ssize_t NuPlayer::GenericSource::getSelectedTrack(media_track_type type) const {
887    sp<AMessage> msg = new AMessage(kWhatGetSelectedTrack, id());
888    msg->setInt32("type", type);
889
890    sp<AMessage> response;
891    int32_t index;
892    status_t err = msg->postAndAwaitResponse(&response);
893    if (err == OK && response != NULL) {
894        CHECK(response->findInt32("index", &index));
895        return index;
896    } else {
897        return -1;
898    }
899}
900
901void NuPlayer::GenericSource::onGetSelectedTrack(sp<AMessage> msg) const {
902    int32_t tmpType;
903    CHECK(msg->findInt32("type", &tmpType));
904    media_track_type type = (media_track_type)tmpType;
905
906    sp<AMessage> response = new AMessage;
907    ssize_t index = doGetSelectedTrack(type);
908    response->setInt32("index", index);
909
910    uint32_t replyID;
911    CHECK(msg->senderAwaitsResponse(&replyID));
912    response->postReply(replyID);
913}
914
915ssize_t NuPlayer::GenericSource::doGetSelectedTrack(media_track_type type) const {
916    const Track *track = NULL;
917    switch (type) {
918    case MEDIA_TRACK_TYPE_VIDEO:
919        track = &mVideoTrack;
920        break;
921    case MEDIA_TRACK_TYPE_AUDIO:
922        track = &mAudioTrack;
923        break;
924    case MEDIA_TRACK_TYPE_TIMEDTEXT:
925        track = &mTimedTextTrack;
926        break;
927    case MEDIA_TRACK_TYPE_SUBTITLE:
928        track = &mSubtitleTrack;
929        break;
930    default:
931        break;
932    }
933
934    if (track != NULL && track->mSource != NULL) {
935        return track->mIndex;
936    }
937
938    return -1;
939}
940
941status_t NuPlayer::GenericSource::selectTrack(size_t trackIndex, bool select) {
942    ALOGV("%s track: %zu", select ? "select" : "deselect", trackIndex);
943    sp<AMessage> msg = new AMessage(kWhatSelectTrack, id());
944    msg->setInt32("trackIndex", trackIndex);
945    msg->setInt32("select", trackIndex);
946
947    sp<AMessage> response;
948    status_t err = msg->postAndAwaitResponse(&response);
949    if (err == OK && response != NULL) {
950        CHECK(response->findInt32("err", &err));
951    }
952
953    return err;
954}
955
956void NuPlayer::GenericSource::onSelectTrack(sp<AMessage> msg) {
957    int32_t trackIndex, select;
958    CHECK(msg->findInt32("trackIndex", &trackIndex));
959    CHECK(msg->findInt32("select", &select));
960
961    sp<AMessage> response = new AMessage;
962    status_t err = doSelectTrack(trackIndex, select);
963    response->setInt32("err", err);
964
965    uint32_t replyID;
966    CHECK(msg->senderAwaitsResponse(&replyID));
967    response->postReply(replyID);
968}
969
970status_t NuPlayer::GenericSource::doSelectTrack(size_t trackIndex, bool select) {
971    if (trackIndex >= mSources.size()) {
972        return BAD_INDEX;
973    }
974
975    if (!select) {
976        Track* track = NULL;
977        if (mSubtitleTrack.mSource != NULL && trackIndex == mSubtitleTrack.mIndex) {
978            track = &mSubtitleTrack;
979            mFetchSubtitleDataGeneration++;
980        } else if (mTimedTextTrack.mSource != NULL && trackIndex == mTimedTextTrack.mIndex) {
981            track = &mTimedTextTrack;
982            mFetchTimedTextDataGeneration++;
983        }
984        if (track == NULL) {
985            return INVALID_OPERATION;
986        }
987        track->mSource->stop();
988        track->mSource = NULL;
989        track->mPackets->clear();
990        return OK;
991    }
992
993    const sp<MediaSource> source = mSources.itemAt(trackIndex);
994    sp<MetaData> meta = source->getFormat();
995    const char *mime;
996    CHECK(meta->findCString(kKeyMIMEType, &mime));
997    if (!strncasecmp(mime, "text/", 5)) {
998        bool isSubtitle = strcasecmp(mime, MEDIA_MIMETYPE_TEXT_3GPP);
999        Track *track = isSubtitle ? &mSubtitleTrack : &mTimedTextTrack;
1000        if (track->mSource != NULL && track->mIndex == trackIndex) {
1001            return OK;
1002        }
1003        track->mIndex = trackIndex;
1004        if (track->mSource != NULL) {
1005            track->mSource->stop();
1006        }
1007        track->mSource = mSources.itemAt(trackIndex);
1008        track->mSource->start();
1009        if (track->mPackets == NULL) {
1010            track->mPackets = new AnotherPacketSource(track->mSource->getFormat());
1011        } else {
1012            track->mPackets->clear();
1013            track->mPackets->setFormat(track->mSource->getFormat());
1014
1015        }
1016
1017        if (isSubtitle) {
1018            mFetchSubtitleDataGeneration++;
1019        } else {
1020            mFetchTimedTextDataGeneration++;
1021        }
1022
1023        return OK;
1024    } else if (!strncasecmp(mime, "audio/", 6) || !strncasecmp(mime, "video/", 6)) {
1025        bool audio = !strncasecmp(mime, "audio/", 6);
1026        Track *track = audio ? &mAudioTrack : &mVideoTrack;
1027        if (track->mSource != NULL && track->mIndex == trackIndex) {
1028            return OK;
1029        }
1030
1031        sp<AMessage> msg = new AMessage(kWhatChangeAVSource, id());
1032        msg->setInt32("trackIndex", trackIndex);
1033        msg->post();
1034        return OK;
1035    }
1036
1037    return INVALID_OPERATION;
1038}
1039
1040status_t NuPlayer::GenericSource::seekTo(int64_t seekTimeUs) {
1041    sp<AMessage> msg = new AMessage(kWhatSeek, id());
1042    msg->setInt64("seekTimeUs", seekTimeUs);
1043
1044    sp<AMessage> response;
1045    status_t err = msg->postAndAwaitResponse(&response);
1046    if (err == OK && response != NULL) {
1047        CHECK(response->findInt32("err", &err));
1048    }
1049
1050    return err;
1051}
1052
1053void NuPlayer::GenericSource::onSeek(sp<AMessage> msg) {
1054    int64_t seekTimeUs;
1055    CHECK(msg->findInt64("seekTimeUs", &seekTimeUs));
1056
1057    sp<AMessage> response = new AMessage;
1058    status_t err = doSeek(seekTimeUs);
1059    response->setInt32("err", err);
1060
1061    uint32_t replyID;
1062    CHECK(msg->senderAwaitsResponse(&replyID));
1063    response->postReply(replyID);
1064}
1065
1066status_t NuPlayer::GenericSource::doSeek(int64_t seekTimeUs) {
1067    if (mVideoTrack.mSource != NULL) {
1068        int64_t actualTimeUs;
1069        readBuffer(MEDIA_TRACK_TYPE_VIDEO, seekTimeUs, &actualTimeUs);
1070
1071        seekTimeUs = actualTimeUs;
1072    }
1073
1074    if (mAudioTrack.mSource != NULL) {
1075        readBuffer(MEDIA_TRACK_TYPE_AUDIO, seekTimeUs);
1076    }
1077
1078    setDrmPlaybackStatusIfNeeded(Playback::START, seekTimeUs / 1000);
1079    if (!mStarted) {
1080        setDrmPlaybackStatusIfNeeded(Playback::PAUSE, 0);
1081    }
1082    return OK;
1083}
1084
1085sp<ABuffer> NuPlayer::GenericSource::mediaBufferToABuffer(
1086        MediaBuffer* mb,
1087        media_track_type trackType,
1088        int64_t *actualTimeUs) {
1089    bool audio = trackType == MEDIA_TRACK_TYPE_AUDIO;
1090    size_t outLength = mb->range_length();
1091
1092    if (audio && mAudioIsVorbis) {
1093        outLength += sizeof(int32_t);
1094    }
1095
1096    sp<ABuffer> ab;
1097    if (mIsWidevine && !audio) {
1098        // data is already provided in the buffer
1099        ab = new ABuffer(NULL, mb->range_length());
1100        mb->add_ref();
1101        ab->setMediaBufferBase(mb);
1102    } else {
1103        ab = new ABuffer(outLength);
1104        memcpy(ab->data(),
1105               (const uint8_t *)mb->data() + mb->range_offset(),
1106               mb->range_length());
1107    }
1108
1109    if (audio && mAudioIsVorbis) {
1110        int32_t numPageSamples;
1111        if (!mb->meta_data()->findInt32(kKeyValidSamples, &numPageSamples)) {
1112            numPageSamples = -1;
1113        }
1114
1115        uint8_t* abEnd = ab->data() + mb->range_length();
1116        memcpy(abEnd, &numPageSamples, sizeof(numPageSamples));
1117    }
1118
1119    sp<AMessage> meta = ab->meta();
1120
1121    int64_t timeUs;
1122    CHECK(mb->meta_data()->findInt64(kKeyTime, &timeUs));
1123    meta->setInt64("timeUs", timeUs);
1124
1125    if (trackType == MEDIA_TRACK_TYPE_TIMEDTEXT) {
1126        const char *mime;
1127        CHECK(mTimedTextTrack.mSource != NULL
1128                && mTimedTextTrack.mSource->getFormat()->findCString(kKeyMIMEType, &mime));
1129        meta->setString("mime", mime);
1130    }
1131
1132    int64_t durationUs;
1133    if (mb->meta_data()->findInt64(kKeyDuration, &durationUs)) {
1134        meta->setInt64("durationUs", durationUs);
1135    }
1136
1137    if (trackType == MEDIA_TRACK_TYPE_SUBTITLE) {
1138        meta->setInt32("trackIndex", mSubtitleTrack.mIndex);
1139    }
1140
1141    if (actualTimeUs) {
1142        *actualTimeUs = timeUs;
1143    }
1144
1145    mb->release();
1146    mb = NULL;
1147
1148    return ab;
1149}
1150
1151void NuPlayer::GenericSource::postReadBuffer(media_track_type trackType) {
1152    Mutex::Autolock _l(mReadBufferLock);
1153
1154    if ((mPendingReadBufferTypes & (1 << trackType)) == 0) {
1155        mPendingReadBufferTypes |= (1 << trackType);
1156        sp<AMessage> msg = new AMessage(kWhatReadBuffer, id());
1157        msg->setInt32("trackType", trackType);
1158        msg->post();
1159    }
1160}
1161
1162void NuPlayer::GenericSource::onReadBuffer(sp<AMessage> msg) {
1163    int32_t tmpType;
1164    CHECK(msg->findInt32("trackType", &tmpType));
1165    media_track_type trackType = (media_track_type)tmpType;
1166    {
1167        // only protect the variable change, as readBuffer may
1168        // take considerable time.  This may result in one extra
1169        // read being processed, but that is benign.
1170        Mutex::Autolock _l(mReadBufferLock);
1171        mPendingReadBufferTypes &= ~(1 << trackType);
1172    }
1173    readBuffer(trackType);
1174}
1175
1176void NuPlayer::GenericSource::readBuffer(
1177        media_track_type trackType, int64_t seekTimeUs, int64_t *actualTimeUs, bool formatChange) {
1178    Track *track;
1179    size_t maxBuffers = 1;
1180    switch (trackType) {
1181        case MEDIA_TRACK_TYPE_VIDEO:
1182            track = &mVideoTrack;
1183            break;
1184        case MEDIA_TRACK_TYPE_AUDIO:
1185            track = &mAudioTrack;
1186            maxBuffers = 64;
1187            break;
1188        case MEDIA_TRACK_TYPE_SUBTITLE:
1189            track = &mSubtitleTrack;
1190            break;
1191        case MEDIA_TRACK_TYPE_TIMEDTEXT:
1192            track = &mTimedTextTrack;
1193            break;
1194        default:
1195            TRESPASS();
1196    }
1197
1198    if (track->mSource == NULL) {
1199        return;
1200    }
1201
1202    if (actualTimeUs) {
1203        *actualTimeUs = seekTimeUs;
1204    }
1205
1206    MediaSource::ReadOptions options;
1207
1208    bool seeking = false;
1209
1210    if (seekTimeUs >= 0) {
1211        options.setSeekTo(seekTimeUs, MediaSource::ReadOptions::SEEK_PREVIOUS_SYNC);
1212        seeking = true;
1213    }
1214
1215    if (mIsWidevine && trackType != MEDIA_TRACK_TYPE_AUDIO) {
1216        options.setNonBlocking();
1217    }
1218
1219    for (size_t numBuffers = 0; numBuffers < maxBuffers; ) {
1220        MediaBuffer *mbuf;
1221        status_t err = track->mSource->read(&mbuf, &options);
1222
1223        options.clearSeekTo();
1224
1225        if (err == OK) {
1226            int64_t timeUs;
1227            CHECK(mbuf->meta_data()->findInt64(kKeyTime, &timeUs));
1228            if (trackType == MEDIA_TRACK_TYPE_AUDIO) {
1229                mAudioTimeUs = timeUs;
1230            } else if (trackType == MEDIA_TRACK_TYPE_VIDEO) {
1231                mVideoTimeUs = timeUs;
1232            }
1233
1234            // formatChange && seeking: track whose source is changed during selection
1235            // formatChange && !seeking: track whose source is not changed during selection
1236            // !formatChange: normal seek
1237            if ((seeking || formatChange)
1238                    && (trackType == MEDIA_TRACK_TYPE_AUDIO
1239                    || trackType == MEDIA_TRACK_TYPE_VIDEO)) {
1240                ATSParser::DiscontinuityType type = formatChange
1241                        ? (seeking
1242                                ? ATSParser::DISCONTINUITY_FORMATCHANGE
1243                                : ATSParser::DISCONTINUITY_NONE)
1244                        : ATSParser::DISCONTINUITY_SEEK;
1245                track->mPackets->queueDiscontinuity( type, NULL, true /* discard */);
1246            }
1247
1248            sp<ABuffer> buffer = mediaBufferToABuffer(mbuf, trackType, actualTimeUs);
1249            track->mPackets->queueAccessUnit(buffer);
1250            ++numBuffers;
1251        } else if (err == WOULD_BLOCK) {
1252            break;
1253        } else if (err == INFO_FORMAT_CHANGED) {
1254#if 0
1255            track->mPackets->queueDiscontinuity(
1256                    ATSParser::DISCONTINUITY_FORMATCHANGE,
1257                    NULL,
1258                    false /* discard */);
1259#endif
1260        } else {
1261            track->mPackets->signalEOS(err);
1262            break;
1263        }
1264    }
1265}
1266
1267}  // namespace android
1268