GenericSource.cpp revision 2abde2c118a94f843a7450818c925d3f0b673cd3 
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    mStopRead = true;
77}
78
79status_t NuPlayer::GenericSource::setDataSource(
80        const sp<IMediaHTTPService> &httpService,
81        const char *url,
82        const KeyedVector<String8, String8> *headers) {
83    resetDataSource();
84
85    mHTTPService = httpService;
86    mUri = url;
87
88    if (headers) {
89        mUriHeaders = *headers;
90    }
91
92    // delay data source creation to prepareAsync() to avoid blocking
93    // the calling thread in setDataSource for any significant time.
94    return OK;
95}
96
97status_t NuPlayer::GenericSource::setDataSource(
98        int fd, int64_t offset, int64_t length) {
99    resetDataSource();
100
101    mFd = dup(fd);
102    mOffset = offset;
103    mLength = length;
104
105    // delay data source creation to prepareAsync() to avoid blocking
106    // the calling thread in setDataSource for any significant time.
107    return OK;
108}
109
110sp<MetaData> NuPlayer::GenericSource::getFileFormatMeta() const {
111    return mFileMeta;
112}
113
114status_t NuPlayer::GenericSource::initFromDataSource() {
115    sp<MediaExtractor> extractor;
116
117    CHECK(mDataSource != NULL);
118
119    if (mIsWidevine) {
120        String8 mimeType;
121        float confidence;
122        sp<AMessage> dummy;
123        bool success;
124
125        success = SniffWVM(mDataSource, &mimeType, &confidence, &dummy);
126        if (!success
127                || strcasecmp(
128                    mimeType.string(), MEDIA_MIMETYPE_CONTAINER_WVM)) {
129            ALOGE("unsupported widevine mime: %s", mimeType.string());
130            return UNKNOWN_ERROR;
131        }
132
133        mWVMExtractor = new WVMExtractor(mDataSource);
134        mWVMExtractor->setAdaptiveStreamingMode(true);
135        if (mUIDValid) {
136            mWVMExtractor->setUID(mUID);
137        }
138        extractor = mWVMExtractor;
139    } else {
140        extractor = MediaExtractor::Create(mDataSource,
141                mSniffedMIME.empty() ? NULL: mSniffedMIME.c_str());
142    }
143
144    if (extractor == NULL) {
145        return UNKNOWN_ERROR;
146    }
147
148    if (extractor->getDrmFlag()) {
149        checkDrmStatus(mDataSource);
150    }
151
152    mFileMeta = extractor->getMetaData();
153    if (mFileMeta != NULL) {
154        int64_t duration;
155        if (mFileMeta->findInt64(kKeyDuration, &duration)) {
156            mDurationUs = duration;
157        }
158    }
159
160    int32_t totalBitrate = 0;
161
162    size_t numtracks = extractor->countTracks();
163    if (numtracks == 0) {
164        return UNKNOWN_ERROR;
165    }
166
167    for (size_t i = 0; i < numtracks; ++i) {
168        sp<MediaSource> track = extractor->getTrack(i);
169
170        sp<MetaData> meta = extractor->getTrackMetaData(i);
171
172        const char *mime;
173        CHECK(meta->findCString(kKeyMIMEType, &mime));
174
175        // Do the string compare immediately with "mime",
176        // we can't assume "mime" would stay valid after another
177        // extractor operation, some extractors might modify meta
178        // during getTrack() and make it invalid.
179        if (!strncasecmp(mime, "audio/", 6)) {
180            if (mAudioTrack.mSource == NULL) {
181                mAudioTrack.mIndex = i;
182                mAudioTrack.mSource = track;
183                mAudioTrack.mPackets =
184                    new AnotherPacketSource(mAudioTrack.mSource->getFormat());
185
186                if (!strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_VORBIS)) {
187                    mAudioIsVorbis = true;
188                } else {
189                    mAudioIsVorbis = false;
190                }
191            }
192        } else if (!strncasecmp(mime, "video/", 6)) {
193            if (mVideoTrack.mSource == NULL) {
194                mVideoTrack.mIndex = i;
195                mVideoTrack.mSource = track;
196                mVideoTrack.mPackets =
197                    new AnotherPacketSource(mVideoTrack.mSource->getFormat());
198
199                // check if the source requires secure buffers
200                int32_t secure;
201                if (meta->findInt32(kKeyRequiresSecureBuffers, &secure)
202                        && secure) {
203                    mIsWidevine = true;
204                    if (mUIDValid) {
205                        extractor->setUID(mUID);
206                    }
207                }
208            }
209        }
210
211        if (track != NULL) {
212            mSources.push(track);
213            int64_t durationUs;
214            if (meta->findInt64(kKeyDuration, &durationUs)) {
215                if (durationUs > mDurationUs) {
216                    mDurationUs = durationUs;
217                }
218            }
219
220            int32_t bitrate;
221            if (totalBitrate >= 0 && meta->findInt32(kKeyBitRate, &bitrate)) {
222                totalBitrate += bitrate;
223            } else {
224                totalBitrate = -1;
225            }
226        }
227    }
228
229    mBitrate = totalBitrate;
230
231    return OK;
232}
233
234void NuPlayer::GenericSource::checkDrmStatus(const sp<DataSource>& dataSource) {
235    dataSource->getDrmInfo(mDecryptHandle, &mDrmManagerClient);
236    if (mDecryptHandle != NULL) {
237        CHECK(mDrmManagerClient);
238        if (RightsStatus::RIGHTS_VALID != mDecryptHandle->status) {
239            sp<AMessage> msg = dupNotify();
240            msg->setInt32("what", kWhatDrmNoLicense);
241            msg->post();
242        }
243    }
244}
245
246int64_t NuPlayer::GenericSource::getLastReadPosition() {
247    if (mAudioTrack.mSource != NULL) {
248        return mAudioTimeUs;
249    } else if (mVideoTrack.mSource != NULL) {
250        return mVideoTimeUs;
251    } else {
252        return 0;
253    }
254}
255
256status_t NuPlayer::GenericSource::setBuffers(
257        bool audio, Vector<MediaBuffer *> &buffers) {
258    if (mIsWidevine && !audio) {
259        return mVideoTrack.mSource->setBuffers(buffers);
260    }
261    return INVALID_OPERATION;
262}
263
264NuPlayer::GenericSource::~GenericSource() {
265    if (mLooper != NULL) {
266        mLooper->unregisterHandler(id());
267        mLooper->stop();
268    }
269}
270
271void NuPlayer::GenericSource::prepareAsync() {
272    if (mLooper == NULL) {
273        mLooper = new ALooper;
274        mLooper->setName("generic");
275        mLooper->start();
276
277        mLooper->registerHandler(this);
278    }
279
280    sp<AMessage> msg = new AMessage(kWhatPrepareAsync, id());
281    msg->post();
282}
283
284void NuPlayer::GenericSource::onPrepareAsync() {
285    // delayed data source creation
286    if (mDataSource == NULL) {
287        if (!mUri.empty()) {
288            mIsWidevine = !strncasecmp(mUri.c_str(), "widevine://", 11);
289
290            mDataSource = DataSource::CreateFromURI(
291                   mHTTPService, mUri.c_str(), &mUriHeaders, &mContentType);
292        } else {
293            // set to false first, if the extractor
294            // comes back as secure, set it to true then.
295            mIsWidevine = false;
296
297            mDataSource = new FileSource(mFd, mOffset, mLength);
298        }
299
300        if (mDataSource == NULL) {
301            ALOGE("Failed to create data source!");
302            notifyPreparedAndCleanup(UNKNOWN_ERROR);
303            return;
304        }
305
306        if (mDataSource->flags() & DataSource::kIsCachingDataSource) {
307            mCachedSource = static_cast<NuCachedSource2 *>(mDataSource.get());
308        }
309
310        if (mIsWidevine || mCachedSource != NULL) {
311            schedulePollBuffering();
312        }
313    }
314
315    // check initial caching status
316    status_t err = prefillCacheIfNecessary();
317    if (err != OK) {
318        if (err == -EAGAIN) {
319            (new AMessage(kWhatPrepareAsync, id()))->post(200000);
320        } else {
321            ALOGE("Failed to prefill data cache!");
322            notifyPreparedAndCleanup(UNKNOWN_ERROR);
323        }
324        return;
325    }
326
327    // init extrator from data source
328    err = initFromDataSource();
329
330    if (err != OK) {
331        ALOGE("Failed to init from data source!");
332        notifyPreparedAndCleanup(err);
333        return;
334    }
335
336    if (mVideoTrack.mSource != NULL) {
337        sp<MetaData> meta = doGetFormatMeta(false /* audio */);
338        sp<AMessage> msg = new AMessage;
339        err = convertMetaDataToMessage(meta, &msg);
340        if(err != OK) {
341            notifyPreparedAndCleanup(err);
342            return;
343        }
344        notifyVideoSizeChanged(msg);
345    }
346
347    notifyFlagsChanged(
348            (mIsWidevine ? FLAG_SECURE : 0)
349            | FLAG_CAN_PAUSE
350            | FLAG_CAN_SEEK_BACKWARD
351            | FLAG_CAN_SEEK_FORWARD
352            | FLAG_CAN_SEEK);
353
354    notifyPrepared();
355}
356
357void NuPlayer::GenericSource::notifyPreparedAndCleanup(status_t err) {
358    if (err != OK) {
359        mMetaDataSize = -1ll;
360        mContentType = "";
361        mSniffedMIME = "";
362        mDataSource.clear();
363        mCachedSource.clear();
364
365        cancelPollBuffering();
366    }
367    notifyPrepared(err);
368}
369
370status_t NuPlayer::GenericSource::prefillCacheIfNecessary() {
371    CHECK(mDataSource != NULL);
372
373    if (mCachedSource == NULL) {
374        // no prefill if the data source is not cached
375        return OK;
376    }
377
378    // We're not doing this for streams that appear to be audio-only
379    // streams to ensure that even low bandwidth streams start
380    // playing back fairly instantly.
381    if (!strncasecmp(mContentType.string(), "audio/", 6)) {
382        return OK;
383    }
384
385    // We're going to prefill the cache before trying to instantiate
386    // the extractor below, as the latter is an operation that otherwise
387    // could block on the datasource for a significant amount of time.
388    // During that time we'd be unable to abort the preparation phase
389    // without this prefill.
390
391    // Initially make sure we have at least 192 KB for the sniff
392    // to complete without blocking.
393    static const size_t kMinBytesForSniffing = 192 * 1024;
394    static const size_t kDefaultMetaSize = 200000;
395
396    status_t finalStatus;
397
398    size_t cachedDataRemaining =
399            mCachedSource->approxDataRemaining(&finalStatus);
400
401    if (finalStatus != OK || (mMetaDataSize >= 0
402            && (off64_t)cachedDataRemaining >= mMetaDataSize)) {
403        ALOGV("stop caching, status %d, "
404                "metaDataSize %lld, cachedDataRemaining %zu",
405                finalStatus, mMetaDataSize, cachedDataRemaining);
406        return OK;
407    }
408
409    ALOGV("now cached %zu bytes of data", cachedDataRemaining);
410
411    if (mMetaDataSize < 0
412            && cachedDataRemaining >= kMinBytesForSniffing) {
413        String8 tmp;
414        float confidence;
415        sp<AMessage> meta;
416        if (!mCachedSource->sniff(&tmp, &confidence, &meta)) {
417            return UNKNOWN_ERROR;
418        }
419
420        // We successfully identified the file's extractor to
421        // be, remember this mime type so we don't have to
422        // sniff it again when we call MediaExtractor::Create()
423        mSniffedMIME = tmp.string();
424
425        if (meta == NULL
426                || !meta->findInt64("meta-data-size",
427                        reinterpret_cast<int64_t*>(&mMetaDataSize))) {
428            mMetaDataSize = kDefaultMetaSize;
429        }
430
431        if (mMetaDataSize < 0ll) {
432            ALOGE("invalid metaDataSize = %lld bytes", mMetaDataSize);
433            return UNKNOWN_ERROR;
434        }
435    }
436
437    return -EAGAIN;
438}
439
440void NuPlayer::GenericSource::start() {
441    ALOGI("start");
442
443    mStopRead = false;
444    if (mAudioTrack.mSource != NULL) {
445        CHECK_EQ(mAudioTrack.mSource->start(), (status_t)OK);
446
447        postReadBuffer(MEDIA_TRACK_TYPE_AUDIO);
448    }
449
450    if (mVideoTrack.mSource != NULL) {
451        CHECK_EQ(mVideoTrack.mSource->start(), (status_t)OK);
452
453        postReadBuffer(MEDIA_TRACK_TYPE_VIDEO);
454    }
455
456    setDrmPlaybackStatusIfNeeded(Playback::START, getLastReadPosition() / 1000);
457    mStarted = true;
458}
459
460void NuPlayer::GenericSource::stop() {
461    // nothing to do, just account for DRM playback status
462    setDrmPlaybackStatusIfNeeded(Playback::STOP, 0);
463    mStarted = false;
464    if (mIsWidevine) {
465        // For a widevine source we need to prevent any further reads.
466        sp<AMessage> msg = new AMessage(kWhatStopWidevine, id());
467        sp<AMessage> response;
468        (void) msg->postAndAwaitResponse(&response);
469    }
470}
471
472void NuPlayer::GenericSource::pause() {
473    // nothing to do, just account for DRM playback status
474    setDrmPlaybackStatusIfNeeded(Playback::PAUSE, 0);
475    mStarted = false;
476}
477
478void NuPlayer::GenericSource::resume() {
479    // nothing to do, just account for DRM playback status
480    setDrmPlaybackStatusIfNeeded(Playback::START, getLastReadPosition() / 1000);
481    mStarted = true;
482}
483
484void NuPlayer::GenericSource::disconnect() {
485    if (mDataSource != NULL) {
486        // disconnect data source
487        if (mDataSource->flags() & DataSource::kIsCachingDataSource) {
488            static_cast<NuCachedSource2 *>(mDataSource.get())->disconnect();
489        }
490    }
491}
492
493void NuPlayer::GenericSource::setDrmPlaybackStatusIfNeeded(int playbackStatus, int64_t position) {
494    if (mDecryptHandle != NULL) {
495        mDrmManagerClient->setPlaybackStatus(mDecryptHandle, playbackStatus, position);
496    }
497    mSubtitleTrack.mPackets = new AnotherPacketSource(NULL);
498    mTimedTextTrack.mPackets = new AnotherPacketSource(NULL);
499}
500
501status_t NuPlayer::GenericSource::feedMoreTSData() {
502    return OK;
503}
504
505void NuPlayer::GenericSource::schedulePollBuffering() {
506    sp<AMessage> msg = new AMessage(kWhatPollBuffering, id());
507    msg->setInt32("generation", mPollBufferingGeneration);
508    msg->post(1000000ll);
509}
510
511void NuPlayer::GenericSource::cancelPollBuffering() {
512    ++mPollBufferingGeneration;
513}
514
515void NuPlayer::GenericSource::notifyBufferingUpdate(int percentage) {
516    sp<AMessage> msg = dupNotify();
517    msg->setInt32("what", kWhatBufferingUpdate);
518    msg->setInt32("percentage", percentage);
519    msg->post();
520}
521
522void NuPlayer::GenericSource::onPollBuffering() {
523    status_t finalStatus = UNKNOWN_ERROR;
524    int64_t cachedDurationUs = 0ll;
525
526    if (mCachedSource != NULL) {
527        size_t cachedDataRemaining =
528                mCachedSource->approxDataRemaining(&finalStatus);
529
530        if (finalStatus == OK) {
531            off64_t size;
532            int64_t bitrate = 0ll;
533            if (mDurationUs > 0 && mCachedSource->getSize(&size) == OK) {
534                bitrate = size * 8000000ll / mDurationUs;
535            } else if (mBitrate > 0) {
536                bitrate = mBitrate;
537            }
538            if (bitrate > 0) {
539                cachedDurationUs = cachedDataRemaining * 8000000ll / bitrate;
540            }
541        }
542    } else if (mWVMExtractor != NULL) {
543        cachedDurationUs
544            = mWVMExtractor->getCachedDurationUs(&finalStatus);
545    }
546
547    if (finalStatus == ERROR_END_OF_STREAM) {
548        notifyBufferingUpdate(100);
549        cancelPollBuffering();
550        return;
551    } else if (cachedDurationUs > 0ll && mDurationUs > 0ll) {
552        int percentage = 100.0 * cachedDurationUs / mDurationUs;
553        if (percentage > 100) {
554            percentage = 100;
555        }
556
557        notifyBufferingUpdate(percentage);
558    }
559
560    schedulePollBuffering();
561}
562
563
564void NuPlayer::GenericSource::onMessageReceived(const sp<AMessage> &msg) {
565    switch (msg->what()) {
566      case kWhatPrepareAsync:
567      {
568          onPrepareAsync();
569          break;
570      }
571      case kWhatFetchSubtitleData:
572      {
573          fetchTextData(kWhatSendSubtitleData, MEDIA_TRACK_TYPE_SUBTITLE,
574                  mFetchSubtitleDataGeneration, mSubtitleTrack.mPackets, msg);
575          break;
576      }
577
578      case kWhatFetchTimedTextData:
579      {
580          fetchTextData(kWhatSendTimedTextData, MEDIA_TRACK_TYPE_TIMEDTEXT,
581                  mFetchTimedTextDataGeneration, mTimedTextTrack.mPackets, msg);
582          break;
583      }
584
585      case kWhatSendSubtitleData:
586      {
587          sendTextData(kWhatSubtitleData, MEDIA_TRACK_TYPE_SUBTITLE,
588                  mFetchSubtitleDataGeneration, mSubtitleTrack.mPackets, msg);
589          break;
590      }
591
592      case kWhatSendTimedTextData:
593      {
594          sendTextData(kWhatTimedTextData, MEDIA_TRACK_TYPE_TIMEDTEXT,
595                  mFetchTimedTextDataGeneration, mTimedTextTrack.mPackets, msg);
596          break;
597      }
598
599      case kWhatChangeAVSource:
600      {
601          int32_t trackIndex;
602          CHECK(msg->findInt32("trackIndex", &trackIndex));
603          const sp<MediaSource> source = mSources.itemAt(trackIndex);
604
605          Track* track;
606          const char *mime;
607          media_track_type trackType, counterpartType;
608          sp<MetaData> meta = source->getFormat();
609          meta->findCString(kKeyMIMEType, &mime);
610          if (!strncasecmp(mime, "audio/", 6)) {
611              track = &mAudioTrack;
612              trackType = MEDIA_TRACK_TYPE_AUDIO;
613              counterpartType = MEDIA_TRACK_TYPE_VIDEO;;
614          } else {
615              CHECK(!strncasecmp(mime, "video/", 6));
616              track = &mVideoTrack;
617              trackType = MEDIA_TRACK_TYPE_VIDEO;
618              counterpartType = MEDIA_TRACK_TYPE_AUDIO;;
619          }
620
621
622          if (track->mSource != NULL) {
623              track->mSource->stop();
624          }
625          track->mSource = source;
626          track->mSource->start();
627          track->mIndex = trackIndex;
628
629          status_t avail;
630          if (!track->mPackets->hasBufferAvailable(&avail)) {
631              // sync from other source
632              TRESPASS();
633              break;
634          }
635
636          int64_t timeUs, actualTimeUs;
637          const bool formatChange = true;
638          sp<AMessage> latestMeta = track->mPackets->getLatestEnqueuedMeta();
639          CHECK(latestMeta != NULL && latestMeta->findInt64("timeUs", &timeUs));
640          readBuffer(trackType, timeUs, &actualTimeUs, formatChange);
641          readBuffer(counterpartType, -1, NULL, formatChange);
642          ALOGV("timeUs %lld actualTimeUs %lld", timeUs, actualTimeUs);
643
644          break;
645      }
646      case kWhatPollBuffering:
647      {
648          int32_t generation;
649          CHECK(msg->findInt32("generation", &generation));
650          if (generation == mPollBufferingGeneration) {
651              onPollBuffering();
652          }
653          break;
654      }
655
656      case kWhatGetFormat:
657      {
658          onGetFormatMeta(msg);
659          break;
660      }
661
662      case kWhatGetSelectedTrack:
663      {
664          onGetSelectedTrack(msg);
665          break;
666      }
667
668      case kWhatSelectTrack:
669      {
670          onSelectTrack(msg);
671          break;
672      }
673
674      case kWhatSeek:
675      {
676          onSeek(msg);
677          break;
678      }
679
680      case kWhatReadBuffer:
681      {
682          onReadBuffer(msg);
683          break;
684      }
685
686      case kWhatStopWidevine:
687      {
688          // mStopRead is only used for Widevine to prevent the video source
689          // from being read while the associated video decoder is shutting down.
690          mStopRead = true;
691          if (mVideoTrack.mSource != NULL) {
692              mVideoTrack.mPackets->clear();
693          }
694          sp<AMessage> response = new AMessage;
695          uint32_t replyID;
696          CHECK(msg->senderAwaitsResponse(&replyID));
697          response->postReply(replyID);
698          break;
699      }
700      default:
701          Source::onMessageReceived(msg);
702          break;
703    }
704}
705
706void NuPlayer::GenericSource::fetchTextData(
707        uint32_t sendWhat,
708        media_track_type type,
709        int32_t curGen,
710        sp<AnotherPacketSource> packets,
711        sp<AMessage> msg) {
712    int32_t msgGeneration;
713    CHECK(msg->findInt32("generation", &msgGeneration));
714    if (msgGeneration != curGen) {
715        // stale
716        return;
717    }
718
719    int32_t avail;
720    if (packets->hasBufferAvailable(&avail)) {
721        return;
722    }
723
724    int64_t timeUs;
725    CHECK(msg->findInt64("timeUs", &timeUs));
726
727    int64_t subTimeUs;
728    readBuffer(type, timeUs, &subTimeUs);
729
730    int64_t delayUs = subTimeUs - timeUs;
731    if (msg->what() == kWhatFetchSubtitleData) {
732        const int64_t oneSecUs = 1000000ll;
733        delayUs -= oneSecUs;
734    }
735    sp<AMessage> msg2 = new AMessage(sendWhat, id());
736    msg2->setInt32("generation", msgGeneration);
737    msg2->post(delayUs < 0 ? 0 : delayUs);
738}
739
740void NuPlayer::GenericSource::sendTextData(
741        uint32_t what,
742        media_track_type type,
743        int32_t curGen,
744        sp<AnotherPacketSource> packets,
745        sp<AMessage> msg) {
746    int32_t msgGeneration;
747    CHECK(msg->findInt32("generation", &msgGeneration));
748    if (msgGeneration != curGen) {
749        // stale
750        return;
751    }
752
753    int64_t subTimeUs;
754    if (packets->nextBufferTime(&subTimeUs) != OK) {
755        return;
756    }
757
758    int64_t nextSubTimeUs;
759    readBuffer(type, -1, &nextSubTimeUs);
760
761    sp<ABuffer> buffer;
762    status_t dequeueStatus = packets->dequeueAccessUnit(&buffer);
763    if (dequeueStatus == OK) {
764        sp<AMessage> notify = dupNotify();
765        notify->setInt32("what", what);
766        notify->setBuffer("buffer", buffer);
767        notify->post();
768
769        const int64_t delayUs = nextSubTimeUs - subTimeUs;
770        msg->post(delayUs < 0 ? 0 : delayUs);
771    }
772}
773
774sp<MetaData> NuPlayer::GenericSource::getFormatMeta(bool audio) {
775    sp<AMessage> msg = new AMessage(kWhatGetFormat, id());
776    msg->setInt32("audio", audio);
777
778    sp<AMessage> response;
779    void *format;
780    status_t err = msg->postAndAwaitResponse(&response);
781    if (err == OK && response != NULL) {
782        CHECK(response->findPointer("format", &format));
783        return (MetaData *)format;
784    } else {
785        return NULL;
786    }
787}
788
789void NuPlayer::GenericSource::onGetFormatMeta(sp<AMessage> msg) const {
790    int32_t audio;
791    CHECK(msg->findInt32("audio", &audio));
792
793    sp<AMessage> response = new AMessage;
794    sp<MetaData> format = doGetFormatMeta(audio);
795    response->setPointer("format", format.get());
796
797    uint32_t replyID;
798    CHECK(msg->senderAwaitsResponse(&replyID));
799    response->postReply(replyID);
800}
801
802sp<MetaData> NuPlayer::GenericSource::doGetFormatMeta(bool audio) const {
803    sp<MediaSource> source = audio ? mAudioTrack.mSource : mVideoTrack.mSource;
804
805    if (source == NULL) {
806        return NULL;
807    }
808
809    return source->getFormat();
810}
811
812status_t NuPlayer::GenericSource::dequeueAccessUnit(
813        bool audio, sp<ABuffer> *accessUnit) {
814    Track *track = audio ? &mAudioTrack : &mVideoTrack;
815
816    if (track->mSource == NULL) {
817        return -EWOULDBLOCK;
818    }
819
820    if (mIsWidevine && !audio) {
821        // try to read a buffer as we may not have been able to the last time
822        postReadBuffer(MEDIA_TRACK_TYPE_VIDEO);
823    }
824
825    status_t finalResult;
826    if (!track->mPackets->hasBufferAvailable(&finalResult)) {
827        return (finalResult == OK ? -EWOULDBLOCK : finalResult);
828    }
829
830    status_t result = track->mPackets->dequeueAccessUnit(accessUnit);
831
832    if (!track->mPackets->hasBufferAvailable(&finalResult)) {
833        postReadBuffer(audio? MEDIA_TRACK_TYPE_AUDIO : MEDIA_TRACK_TYPE_VIDEO);
834    }
835
836    if (result != OK) {
837        if (mSubtitleTrack.mSource != NULL) {
838            mSubtitleTrack.mPackets->clear();
839            mFetchSubtitleDataGeneration++;
840        }
841        if (mTimedTextTrack.mSource != NULL) {
842            mTimedTextTrack.mPackets->clear();
843            mFetchTimedTextDataGeneration++;
844        }
845        return result;
846    }
847
848    int64_t timeUs;
849    status_t eosResult; // ignored
850    CHECK((*accessUnit)->meta()->findInt64("timeUs", &timeUs));
851
852    if (mSubtitleTrack.mSource != NULL
853            && !mSubtitleTrack.mPackets->hasBufferAvailable(&eosResult)) {
854        sp<AMessage> msg = new AMessage(kWhatFetchSubtitleData, id());
855        msg->setInt64("timeUs", timeUs);
856        msg->setInt32("generation", mFetchSubtitleDataGeneration);
857        msg->post();
858    }
859
860    if (mTimedTextTrack.mSource != NULL
861            && !mTimedTextTrack.mPackets->hasBufferAvailable(&eosResult)) {
862        sp<AMessage> msg = new AMessage(kWhatFetchTimedTextData, id());
863        msg->setInt64("timeUs", timeUs);
864        msg->setInt32("generation", mFetchTimedTextDataGeneration);
865        msg->post();
866    }
867
868    return result;
869}
870
871status_t NuPlayer::GenericSource::getDuration(int64_t *durationUs) {
872    *durationUs = mDurationUs;
873    return OK;
874}
875
876size_t NuPlayer::GenericSource::getTrackCount() const {
877    return mSources.size();
878}
879
880sp<AMessage> NuPlayer::GenericSource::getTrackInfo(size_t trackIndex) const {
881    size_t trackCount = mSources.size();
882    if (trackIndex >= trackCount) {
883        return NULL;
884    }
885
886    sp<AMessage> format = new AMessage();
887    sp<MetaData> meta = mSources.itemAt(trackIndex)->getFormat();
888
889    const char *mime;
890    CHECK(meta->findCString(kKeyMIMEType, &mime));
891
892    int32_t trackType;
893    if (!strncasecmp(mime, "video/", 6)) {
894        trackType = MEDIA_TRACK_TYPE_VIDEO;
895    } else if (!strncasecmp(mime, "audio/", 6)) {
896        trackType = MEDIA_TRACK_TYPE_AUDIO;
897    } else if (!strcasecmp(mime, MEDIA_MIMETYPE_TEXT_3GPP)) {
898        trackType = MEDIA_TRACK_TYPE_TIMEDTEXT;
899    } else {
900        trackType = MEDIA_TRACK_TYPE_UNKNOWN;
901    }
902    format->setInt32("type", trackType);
903
904    const char *lang;
905    if (!meta->findCString(kKeyMediaLanguage, &lang)) {
906        lang = "und";
907    }
908    format->setString("language", lang);
909
910    if (trackType == MEDIA_TRACK_TYPE_SUBTITLE) {
911        format->setString("mime", mime);
912
913        int32_t isAutoselect = 1, isDefault = 0, isForced = 0;
914        meta->findInt32(kKeyTrackIsAutoselect, &isAutoselect);
915        meta->findInt32(kKeyTrackIsDefault, &isDefault);
916        meta->findInt32(kKeyTrackIsForced, &isForced);
917
918        format->setInt32("auto", !!isAutoselect);
919        format->setInt32("default", !!isDefault);
920        format->setInt32("forced", !!isForced);
921    }
922
923    return format;
924}
925
926ssize_t NuPlayer::GenericSource::getSelectedTrack(media_track_type type) const {
927    sp<AMessage> msg = new AMessage(kWhatGetSelectedTrack, id());
928    msg->setInt32("type", type);
929
930    sp<AMessage> response;
931    int32_t index;
932    status_t err = msg->postAndAwaitResponse(&response);
933    if (err == OK && response != NULL) {
934        CHECK(response->findInt32("index", &index));
935        return index;
936    } else {
937        return -1;
938    }
939}
940
941void NuPlayer::GenericSource::onGetSelectedTrack(sp<AMessage> msg) const {
942    int32_t tmpType;
943    CHECK(msg->findInt32("type", &tmpType));
944    media_track_type type = (media_track_type)tmpType;
945
946    sp<AMessage> response = new AMessage;
947    ssize_t index = doGetSelectedTrack(type);
948    response->setInt32("index", index);
949
950    uint32_t replyID;
951    CHECK(msg->senderAwaitsResponse(&replyID));
952    response->postReply(replyID);
953}
954
955ssize_t NuPlayer::GenericSource::doGetSelectedTrack(media_track_type type) const {
956    const Track *track = NULL;
957    switch (type) {
958    case MEDIA_TRACK_TYPE_VIDEO:
959        track = &mVideoTrack;
960        break;
961    case MEDIA_TRACK_TYPE_AUDIO:
962        track = &mAudioTrack;
963        break;
964    case MEDIA_TRACK_TYPE_TIMEDTEXT:
965        track = &mTimedTextTrack;
966        break;
967    case MEDIA_TRACK_TYPE_SUBTITLE:
968        track = &mSubtitleTrack;
969        break;
970    default:
971        break;
972    }
973
974    if (track != NULL && track->mSource != NULL) {
975        return track->mIndex;
976    }
977
978    return -1;
979}
980
981status_t NuPlayer::GenericSource::selectTrack(size_t trackIndex, bool select) {
982    ALOGV("%s track: %zu", select ? "select" : "deselect", trackIndex);
983    sp<AMessage> msg = new AMessage(kWhatSelectTrack, id());
984    msg->setInt32("trackIndex", trackIndex);
985    msg->setInt32("select", select);
986
987    sp<AMessage> response;
988    status_t err = msg->postAndAwaitResponse(&response);
989    if (err == OK && response != NULL) {
990        CHECK(response->findInt32("err", &err));
991    }
992
993    return err;
994}
995
996void NuPlayer::GenericSource::onSelectTrack(sp<AMessage> msg) {
997    int32_t trackIndex, select;
998    CHECK(msg->findInt32("trackIndex", &trackIndex));
999    CHECK(msg->findInt32("select", &select));
1000
1001    sp<AMessage> response = new AMessage;
1002    status_t err = doSelectTrack(trackIndex, select);
1003    response->setInt32("err", err);
1004
1005    uint32_t replyID;
1006    CHECK(msg->senderAwaitsResponse(&replyID));
1007    response->postReply(replyID);
1008}
1009
1010status_t NuPlayer::GenericSource::doSelectTrack(size_t trackIndex, bool select) {
1011    if (trackIndex >= mSources.size()) {
1012        return BAD_INDEX;
1013    }
1014
1015    if (!select) {
1016        Track* track = NULL;
1017        if (mSubtitleTrack.mSource != NULL && trackIndex == mSubtitleTrack.mIndex) {
1018            track = &mSubtitleTrack;
1019            mFetchSubtitleDataGeneration++;
1020        } else if (mTimedTextTrack.mSource != NULL && trackIndex == mTimedTextTrack.mIndex) {
1021            track = &mTimedTextTrack;
1022            mFetchTimedTextDataGeneration++;
1023        }
1024        if (track == NULL) {
1025            return INVALID_OPERATION;
1026        }
1027        track->mSource->stop();
1028        track->mSource = NULL;
1029        track->mPackets->clear();
1030        return OK;
1031    }
1032
1033    const sp<MediaSource> source = mSources.itemAt(trackIndex);
1034    sp<MetaData> meta = source->getFormat();
1035    const char *mime;
1036    CHECK(meta->findCString(kKeyMIMEType, &mime));
1037    if (!strncasecmp(mime, "text/", 5)) {
1038        bool isSubtitle = strcasecmp(mime, MEDIA_MIMETYPE_TEXT_3GPP);
1039        Track *track = isSubtitle ? &mSubtitleTrack : &mTimedTextTrack;
1040        if (track->mSource != NULL && track->mIndex == trackIndex) {
1041            return OK;
1042        }
1043        track->mIndex = trackIndex;
1044        if (track->mSource != NULL) {
1045            track->mSource->stop();
1046        }
1047        track->mSource = mSources.itemAt(trackIndex);
1048        track->mSource->start();
1049        if (track->mPackets == NULL) {
1050            track->mPackets = new AnotherPacketSource(track->mSource->getFormat());
1051        } else {
1052            track->mPackets->clear();
1053            track->mPackets->setFormat(track->mSource->getFormat());
1054
1055        }
1056
1057        if (isSubtitle) {
1058            mFetchSubtitleDataGeneration++;
1059        } else {
1060            mFetchTimedTextDataGeneration++;
1061        }
1062
1063        return OK;
1064    } else if (!strncasecmp(mime, "audio/", 6) || !strncasecmp(mime, "video/", 6)) {
1065        bool audio = !strncasecmp(mime, "audio/", 6);
1066        Track *track = audio ? &mAudioTrack : &mVideoTrack;
1067        if (track->mSource != NULL && track->mIndex == trackIndex) {
1068            return OK;
1069        }
1070
1071        sp<AMessage> msg = new AMessage(kWhatChangeAVSource, id());
1072        msg->setInt32("trackIndex", trackIndex);
1073        msg->post();
1074        return OK;
1075    }
1076
1077    return INVALID_OPERATION;
1078}
1079
1080status_t NuPlayer::GenericSource::seekTo(int64_t seekTimeUs) {
1081    sp<AMessage> msg = new AMessage(kWhatSeek, id());
1082    msg->setInt64("seekTimeUs", seekTimeUs);
1083
1084    sp<AMessage> response;
1085    status_t err = msg->postAndAwaitResponse(&response);
1086    if (err == OK && response != NULL) {
1087        CHECK(response->findInt32("err", &err));
1088    }
1089
1090    return err;
1091}
1092
1093void NuPlayer::GenericSource::onSeek(sp<AMessage> msg) {
1094    int64_t seekTimeUs;
1095    CHECK(msg->findInt64("seekTimeUs", &seekTimeUs));
1096
1097    sp<AMessage> response = new AMessage;
1098    status_t err = doSeek(seekTimeUs);
1099    response->setInt32("err", err);
1100
1101    uint32_t replyID;
1102    CHECK(msg->senderAwaitsResponse(&replyID));
1103    response->postReply(replyID);
1104}
1105
1106status_t NuPlayer::GenericSource::doSeek(int64_t seekTimeUs) {
1107    // If the Widevine source is stopped, do not attempt to read any
1108    // more buffers.
1109    if (mStopRead) {
1110        return INVALID_OPERATION;
1111    }
1112    if (mVideoTrack.mSource != NULL) {
1113        int64_t actualTimeUs;
1114        readBuffer(MEDIA_TRACK_TYPE_VIDEO, seekTimeUs, &actualTimeUs);
1115
1116        seekTimeUs = actualTimeUs;
1117    }
1118
1119    if (mAudioTrack.mSource != NULL) {
1120        readBuffer(MEDIA_TRACK_TYPE_AUDIO, seekTimeUs);
1121    }
1122
1123    setDrmPlaybackStatusIfNeeded(Playback::START, seekTimeUs / 1000);
1124    if (!mStarted) {
1125        setDrmPlaybackStatusIfNeeded(Playback::PAUSE, 0);
1126    }
1127    return OK;
1128}
1129
1130sp<ABuffer> NuPlayer::GenericSource::mediaBufferToABuffer(
1131        MediaBuffer* mb,
1132        media_track_type trackType,
1133        int64_t *actualTimeUs) {
1134    bool audio = trackType == MEDIA_TRACK_TYPE_AUDIO;
1135    size_t outLength = mb->range_length();
1136
1137    if (audio && mAudioIsVorbis) {
1138        outLength += sizeof(int32_t);
1139    }
1140
1141    sp<ABuffer> ab;
1142    if (mIsWidevine && !audio) {
1143        // data is already provided in the buffer
1144        ab = new ABuffer(NULL, mb->range_length());
1145        mb->add_ref();
1146        ab->setMediaBufferBase(mb);
1147    } else {
1148        ab = new ABuffer(outLength);
1149        memcpy(ab->data(),
1150               (const uint8_t *)mb->data() + mb->range_offset(),
1151               mb->range_length());
1152    }
1153
1154    if (audio && mAudioIsVorbis) {
1155        int32_t numPageSamples;
1156        if (!mb->meta_data()->findInt32(kKeyValidSamples, &numPageSamples)) {
1157            numPageSamples = -1;
1158        }
1159
1160        uint8_t* abEnd = ab->data() + mb->range_length();
1161        memcpy(abEnd, &numPageSamples, sizeof(numPageSamples));
1162    }
1163
1164    sp<AMessage> meta = ab->meta();
1165
1166    int64_t timeUs;
1167    CHECK(mb->meta_data()->findInt64(kKeyTime, &timeUs));
1168    meta->setInt64("timeUs", timeUs);
1169
1170    if (trackType == MEDIA_TRACK_TYPE_TIMEDTEXT) {
1171        const char *mime;
1172        CHECK(mTimedTextTrack.mSource != NULL
1173                && mTimedTextTrack.mSource->getFormat()->findCString(kKeyMIMEType, &mime));
1174        meta->setString("mime", mime);
1175    }
1176
1177    int64_t durationUs;
1178    if (mb->meta_data()->findInt64(kKeyDuration, &durationUs)) {
1179        meta->setInt64("durationUs", durationUs);
1180    }
1181
1182    if (trackType == MEDIA_TRACK_TYPE_SUBTITLE) {
1183        meta->setInt32("trackIndex", mSubtitleTrack.mIndex);
1184    }
1185
1186    if (actualTimeUs) {
1187        *actualTimeUs = timeUs;
1188    }
1189
1190    mb->release();
1191    mb = NULL;
1192
1193    return ab;
1194}
1195
1196void NuPlayer::GenericSource::postReadBuffer(media_track_type trackType) {
1197    Mutex::Autolock _l(mReadBufferLock);
1198
1199    if ((mPendingReadBufferTypes & (1 << trackType)) == 0) {
1200        mPendingReadBufferTypes |= (1 << trackType);
1201        sp<AMessage> msg = new AMessage(kWhatReadBuffer, id());
1202        msg->setInt32("trackType", trackType);
1203        msg->post();
1204    }
1205}
1206
1207void NuPlayer::GenericSource::onReadBuffer(sp<AMessage> msg) {
1208    int32_t tmpType;
1209    CHECK(msg->findInt32("trackType", &tmpType));
1210    media_track_type trackType = (media_track_type)tmpType;
1211    {
1212        // only protect the variable change, as readBuffer may
1213        // take considerable time.  This may result in one extra
1214        // read being processed, but that is benign.
1215        Mutex::Autolock _l(mReadBufferLock);
1216        mPendingReadBufferTypes &= ~(1 << trackType);
1217    }
1218    readBuffer(trackType);
1219}
1220
1221void NuPlayer::GenericSource::readBuffer(
1222        media_track_type trackType, int64_t seekTimeUs, int64_t *actualTimeUs, bool formatChange) {
1223    // Do not read data if Widevine source is stopped
1224    if (mStopRead) {
1225        return;
1226    }
1227    Track *track;
1228    size_t maxBuffers = 1;
1229    switch (trackType) {
1230        case MEDIA_TRACK_TYPE_VIDEO:
1231            track = &mVideoTrack;
1232            if (mIsWidevine) {
1233                maxBuffers = 2;
1234            }
1235            break;
1236        case MEDIA_TRACK_TYPE_AUDIO:
1237            track = &mAudioTrack;
1238            if (mIsWidevine) {
1239                maxBuffers = 8;
1240            } else {
1241                maxBuffers = 64;
1242            }
1243            break;
1244        case MEDIA_TRACK_TYPE_SUBTITLE:
1245            track = &mSubtitleTrack;
1246            break;
1247        case MEDIA_TRACK_TYPE_TIMEDTEXT:
1248            track = &mTimedTextTrack;
1249            break;
1250        default:
1251            TRESPASS();
1252    }
1253
1254    if (track->mSource == NULL) {
1255        return;
1256    }
1257
1258    if (actualTimeUs) {
1259        *actualTimeUs = seekTimeUs;
1260    }
1261
1262    MediaSource::ReadOptions options;
1263
1264    bool seeking = false;
1265
1266    if (seekTimeUs >= 0) {
1267        options.setSeekTo(seekTimeUs, MediaSource::ReadOptions::SEEK_PREVIOUS_SYNC);
1268        seeking = true;
1269    }
1270
1271    if (mIsWidevine && trackType != MEDIA_TRACK_TYPE_AUDIO) {
1272        options.setNonBlocking();
1273    }
1274
1275    for (size_t numBuffers = 0; numBuffers < maxBuffers; ) {
1276        MediaBuffer *mbuf;
1277        status_t err = track->mSource->read(&mbuf, &options);
1278
1279        options.clearSeekTo();
1280
1281        if (err == OK) {
1282            int64_t timeUs;
1283            CHECK(mbuf->meta_data()->findInt64(kKeyTime, &timeUs));
1284            if (trackType == MEDIA_TRACK_TYPE_AUDIO) {
1285                mAudioTimeUs = timeUs;
1286            } else if (trackType == MEDIA_TRACK_TYPE_VIDEO) {
1287                mVideoTimeUs = timeUs;
1288            }
1289
1290            // formatChange && seeking: track whose source is changed during selection
1291            // formatChange && !seeking: track whose source is not changed during selection
1292            // !formatChange: normal seek
1293            if ((seeking || formatChange)
1294                    && (trackType == MEDIA_TRACK_TYPE_AUDIO
1295                    || trackType == MEDIA_TRACK_TYPE_VIDEO)) {
1296                ATSParser::DiscontinuityType type = formatChange
1297                        ? (seeking
1298                                ? ATSParser::DISCONTINUITY_FORMATCHANGE
1299                                : ATSParser::DISCONTINUITY_NONE)
1300                        : ATSParser::DISCONTINUITY_SEEK;
1301                track->mPackets->queueDiscontinuity( type, NULL, true /* discard */);
1302            }
1303
1304            sp<ABuffer> buffer = mediaBufferToABuffer(mbuf, trackType, actualTimeUs);
1305            track->mPackets->queueAccessUnit(buffer);
1306            formatChange = false;
1307            seeking = false;
1308            ++numBuffers;
1309        } else if (err == WOULD_BLOCK) {
1310            break;
1311        } else if (err == INFO_FORMAT_CHANGED) {
1312#if 0
1313            track->mPackets->queueDiscontinuity(
1314                    ATSParser::DISCONTINUITY_FORMATCHANGE,
1315                    NULL,
1316                    false /* discard */);
1317#endif
1318        } else {
1319            track->mPackets->signalEOS(err);
1320            break;
1321        }
1322    }
1323}
1324
1325}  // namespace android
1326