GenericSource.cpp revision 161dc698c7604cfd73310e96503179581822943b 
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#include "NuPlayerDrm.h"
22
23#include "AnotherPacketSource.h"
24#include <binder/IServiceManager.h>
25#include <cutils/properties.h>
26#include <media/IMediaExtractorService.h>
27#include <media/IMediaHTTPService.h>
28#include <media/stagefright/foundation/ABuffer.h>
29#include <media/stagefright/foundation/ADebug.h>
30#include <media/stagefright/foundation/AMessage.h>
31#include <media/stagefright/DataSource.h>
32#include <media/stagefright/FileSource.h>
33#include <media/stagefright/MediaBuffer.h>
34#include <media/stagefright/MediaDefs.h>
35#include <media/stagefright/MediaExtractor.h>
36#include <media/stagefright/MediaSource.h>
37#include <media/stagefright/MetaData.h>
38#include <media/stagefright/Utils.h>
39#include "../../libstagefright/include/NuCachedSource2.h"
40#include "../../libstagefright/include/HTTPBase.h"
41
42namespace android {
43
44static const int kLowWaterMarkMs          = 2000;  // 2secs
45static const int kHighWaterMarkMs         = 5000;  // 5secs
46static const int kHighWaterMarkRebufferMs = 15000;  // 15secs
47
48static const int kLowWaterMarkKB  = 40;
49static const int kHighWaterMarkKB = 200;
50
51NuPlayer::GenericSource::GenericSource(
52        const sp<AMessage> &notify,
53        bool uidValid,
54        uid_t uid)
55    : Source(notify),
56      mAudioTimeUs(0),
57      mAudioLastDequeueTimeUs(0),
58      mVideoTimeUs(0),
59      mVideoLastDequeueTimeUs(0),
60      mFetchSubtitleDataGeneration(0),
61      mFetchTimedTextDataGeneration(0),
62      mDurationUs(-1ll),
63      mAudioIsVorbis(false),
64      mIsSecure(false),
65      mIsStreaming(false),
66      mUIDValid(uidValid),
67      mUID(uid),
68      mFd(-1),
69      mBitrate(-1ll),
70      mPendingReadBufferTypes(0) {
71    ALOGV("GenericSource");
72
73    mBufferingMonitor = new BufferingMonitor(notify);
74    resetDataSource();
75}
76
77void NuPlayer::GenericSource::resetDataSource() {
78    ALOGV("resetDataSource");
79
80    mHTTPService.clear();
81    mHttpSource.clear();
82    mUri.clear();
83    mUriHeaders.clear();
84    if (mFd >= 0) {
85        close(mFd);
86        mFd = -1;
87    }
88    mOffset = 0;
89    mLength = 0;
90    mStarted = false;
91    mStopRead = true;
92
93    if (mBufferingMonitorLooper != NULL) {
94        mBufferingMonitorLooper->unregisterHandler(mBufferingMonitor->id());
95        mBufferingMonitorLooper->stop();
96        mBufferingMonitorLooper = NULL;
97    }
98    mBufferingMonitor->stop();
99
100    mIsDrmProtected = false;
101    mIsSecure = false;
102    mMimes.clear();
103}
104
105status_t NuPlayer::GenericSource::setDataSource(
106        const sp<IMediaHTTPService> &httpService,
107        const char *url,
108        const KeyedVector<String8, String8> *headers) {
109    ALOGV("setDataSource url: %s", url);
110
111    resetDataSource();
112
113    mHTTPService = httpService;
114    mUri = url;
115
116    if (headers) {
117        mUriHeaders = *headers;
118    }
119
120    // delay data source creation to prepareAsync() to avoid blocking
121    // the calling thread in setDataSource for any significant time.
122    return OK;
123}
124
125status_t NuPlayer::GenericSource::setDataSource(
126        int fd, int64_t offset, int64_t length) {
127    ALOGV("setDataSource %d/%lld/%lld", fd, (long long)offset, (long long)length);
128
129    resetDataSource();
130
131    mFd = dup(fd);
132    mOffset = offset;
133    mLength = length;
134
135    // delay data source creation to prepareAsync() to avoid blocking
136    // the calling thread in setDataSource for any significant time.
137    return OK;
138}
139
140status_t NuPlayer::GenericSource::setDataSource(const sp<DataSource>& source) {
141    ALOGV("setDataSource (source: %p)", source.get());
142
143    resetDataSource();
144    mDataSource = source;
145    return OK;
146}
147
148sp<MetaData> NuPlayer::GenericSource::getFileFormatMeta() const {
149    return mFileMeta;
150}
151
152status_t NuPlayer::GenericSource::initFromDataSource() {
153    sp<IMediaExtractor> extractor;
154    CHECK(mDataSource != NULL);
155
156    extractor = MediaExtractor::Create(mDataSource, NULL);
157
158    if (extractor == NULL) {
159        ALOGE("initFromDataSource, cannot create extractor!");
160        return UNKNOWN_ERROR;
161    }
162
163    mFileMeta = extractor->getMetaData();
164    if (mFileMeta != NULL) {
165        int64_t duration;
166        if (mFileMeta->findInt64(kKeyDuration, &duration)) {
167            mDurationUs = duration;
168        }
169    }
170
171    int32_t totalBitrate = 0;
172
173    size_t numtracks = extractor->countTracks();
174    if (numtracks == 0) {
175        ALOGE("initFromDataSource, source has no track!");
176        return UNKNOWN_ERROR;
177    }
178
179    mMimes.clear();
180
181    for (size_t i = 0; i < numtracks; ++i) {
182        sp<IMediaSource> track = extractor->getTrack(i);
183        if (track == NULL) {
184            continue;
185        }
186
187        sp<MetaData> meta = extractor->getTrackMetaData(i);
188        if (meta == NULL) {
189            ALOGE("no metadata for track %zu", i);
190            return UNKNOWN_ERROR;
191        }
192
193        const char *mime;
194        CHECK(meta->findCString(kKeyMIMEType, &mime));
195
196        ALOGV("initFromDataSource track[%zu]: %s", i, mime);
197
198        // Do the string compare immediately with "mime",
199        // we can't assume "mime" would stay valid after another
200        // extractor operation, some extractors might modify meta
201        // during getTrack() and make it invalid.
202        if (!strncasecmp(mime, "audio/", 6)) {
203            if (mAudioTrack.mSource == NULL) {
204                mAudioTrack.mIndex = i;
205                mAudioTrack.mSource = track;
206                mAudioTrack.mPackets =
207                    new AnotherPacketSource(mAudioTrack.mSource->getFormat());
208
209                if (!strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_VORBIS)) {
210                    mAudioIsVorbis = true;
211                } else {
212                    mAudioIsVorbis = false;
213                }
214
215                mMimes.add(String8(mime));
216            }
217        } else if (!strncasecmp(mime, "video/", 6)) {
218            if (mVideoTrack.mSource == NULL) {
219                mVideoTrack.mIndex = i;
220                mVideoTrack.mSource = track;
221                mVideoTrack.mPackets =
222                    new AnotherPacketSource(mVideoTrack.mSource->getFormat());
223
224                // video always at the beginning
225                mMimes.insertAt(String8(mime), 0);
226            }
227        }
228
229        mSources.push(track);
230        int64_t durationUs;
231        if (meta->findInt64(kKeyDuration, &durationUs)) {
232            if (durationUs > mDurationUs) {
233                mDurationUs = durationUs;
234            }
235        }
236
237        int32_t bitrate;
238        if (totalBitrate >= 0 && meta->findInt32(kKeyBitRate, &bitrate)) {
239            totalBitrate += bitrate;
240        } else {
241            totalBitrate = -1;
242        }
243    }
244
245    ALOGV("initFromDataSource mSources.size(): %zu  mIsSecure: %d  mime[0]: %s", mSources.size(),
246            mIsSecure, (mMimes.isEmpty() ? "NONE" : mMimes[0].string()));
247
248    if (mSources.size() == 0) {
249        ALOGE("b/23705695");
250        return UNKNOWN_ERROR;
251    }
252
253    // Modular DRM: The return value doesn't affect source initialization.
254    (void)checkDrmInfo();
255
256    mBitrate = totalBitrate;
257
258    return OK;
259}
260
261status_t NuPlayer::GenericSource::getDefaultBufferingSettings(
262        BufferingSettings* buffering /* nonnull */) {
263    mBufferingMonitor->getDefaultBufferingSettings(buffering);
264    return OK;
265}
266
267status_t NuPlayer::GenericSource::setBufferingSettings(const BufferingSettings& buffering) {
268    return mBufferingMonitor->setBufferingSettings(buffering);
269}
270
271status_t NuPlayer::GenericSource::startSources() {
272    // Start the selected A/V tracks now before we start buffering.
273    // Widevine sources might re-initialize crypto when starting, if we delay
274    // this to start(), all data buffered during prepare would be wasted.
275    // (We don't actually start reading until start().)
276    //
277    // TODO: this logic may no longer be relevant after the removal of widevine
278    // support
279    if (mAudioTrack.mSource != NULL && mAudioTrack.mSource->start() != OK) {
280        ALOGE("failed to start audio track!");
281        return UNKNOWN_ERROR;
282    }
283
284    if (mVideoTrack.mSource != NULL && mVideoTrack.mSource->start() != OK) {
285        ALOGE("failed to start video track!");
286        return UNKNOWN_ERROR;
287    }
288
289    return OK;
290}
291
292int64_t NuPlayer::GenericSource::getLastReadPosition() {
293    if (mAudioTrack.mSource != NULL) {
294        return mAudioTimeUs;
295    } else if (mVideoTrack.mSource != NULL) {
296        return mVideoTimeUs;
297    } else {
298        return 0;
299    }
300}
301
302status_t NuPlayer::GenericSource::setBuffers(
303        bool audio, Vector<MediaBuffer *> &buffers) {
304    if (mIsSecure && !audio && mVideoTrack.mSource != NULL) {
305        return mVideoTrack.mSource->setBuffers(buffers);
306    }
307    return INVALID_OPERATION;
308}
309
310bool NuPlayer::GenericSource::isStreaming() const {
311    return mIsStreaming;
312}
313
314void NuPlayer::GenericSource::setOffloadAudio(bool offload) {
315    mBufferingMonitor->setOffloadAudio(offload);
316}
317
318NuPlayer::GenericSource::~GenericSource() {
319    ALOGV("~GenericSource");
320    if (mLooper != NULL) {
321        mLooper->unregisterHandler(id());
322        mLooper->stop();
323    }
324    resetDataSource();
325}
326
327void NuPlayer::GenericSource::prepareAsync() {
328    ALOGV("prepareAsync: (looper: %d)", (mLooper != NULL));
329
330    if (mLooper == NULL) {
331        mLooper = new ALooper;
332        mLooper->setName("generic");
333        mLooper->start();
334
335        mLooper->registerHandler(this);
336    }
337
338    sp<AMessage> msg = new AMessage(kWhatPrepareAsync, this);
339    msg->post();
340}
341
342void NuPlayer::GenericSource::onPrepareAsync() {
343    ALOGV("onPrepareAsync: mDataSource: %d", (mDataSource != NULL));
344
345    // delayed data source creation
346    if (mDataSource == NULL) {
347        // set to false first, if the extractor
348        // comes back as secure, set it to true then.
349        mIsSecure = false;
350
351        if (!mUri.empty()) {
352            const char* uri = mUri.c_str();
353            String8 contentType;
354
355            if (!strncasecmp("http://", uri, 7) || !strncasecmp("https://", uri, 8)) {
356                mHttpSource = DataSource::CreateMediaHTTP(mHTTPService);
357                if (mHttpSource == NULL) {
358                    ALOGE("Failed to create http source!");
359                    notifyPreparedAndCleanup(UNKNOWN_ERROR);
360                    return;
361                }
362            }
363
364            mDataSource = DataSource::CreateFromURI(
365                   mHTTPService, uri, &mUriHeaders, &contentType,
366                   static_cast<HTTPBase *>(mHttpSource.get()));
367        } else {
368            if (property_get_bool("media.stagefright.extractremote", true) &&
369                    !FileSource::requiresDrm(mFd, mOffset, mLength, nullptr /* mime */)) {
370                sp<IBinder> binder =
371                        defaultServiceManager()->getService(String16("media.extractor"));
372                if (binder != nullptr) {
373                    ALOGD("FileSource remote");
374                    sp<IMediaExtractorService> mediaExService(
375                            interface_cast<IMediaExtractorService>(binder));
376                    sp<IDataSource> source =
377                            mediaExService->makeIDataSource(mFd, mOffset, mLength);
378                    ALOGV("IDataSource(FileSource): %p %d %lld %lld",
379                            source.get(), mFd, (long long)mOffset, (long long)mLength);
380                    if (source.get() != nullptr) {
381                        mDataSource = DataSource::CreateFromIDataSource(source);
382                    } else {
383                        ALOGW("extractor service cannot make data source");
384                    }
385                } else {
386                    ALOGW("extractor service not running");
387                }
388            }
389            if (mDataSource == nullptr) {
390                ALOGD("FileSource local");
391                mDataSource = new FileSource(mFd, mOffset, mLength);
392            }
393
394            mFd = -1;
395        }
396
397        if (mDataSource == NULL) {
398            ALOGE("Failed to create data source!");
399            notifyPreparedAndCleanup(UNKNOWN_ERROR);
400            return;
401        }
402    }
403
404    if (mDataSource->flags() & DataSource::kIsCachingDataSource) {
405        mCachedSource = static_cast<NuCachedSource2 *>(mDataSource.get());
406    }
407
408    // For cached streaming cases, we need to wait for enough
409    // buffering before reporting prepared.
410    mIsStreaming = (mCachedSource != NULL);
411
412    // init extractor from data source
413    status_t err = initFromDataSource();
414
415    if (err != OK) {
416        ALOGE("Failed to init from data source!");
417        notifyPreparedAndCleanup(err);
418        return;
419    }
420
421    if (mVideoTrack.mSource != NULL) {
422        sp<MetaData> meta = doGetFormatMeta(false /* audio */);
423        sp<AMessage> msg = new AMessage;
424        err = convertMetaDataToMessage(meta, &msg);
425        if(err != OK) {
426            notifyPreparedAndCleanup(err);
427            return;
428        }
429        notifyVideoSizeChanged(msg);
430    }
431
432    notifyFlagsChanged(
433            // FLAG_SECURE will be known if/when prepareDrm is called by the app
434            // FLAG_PROTECTED will be known if/when prepareDrm is called by the app
435            FLAG_CAN_PAUSE |
436            FLAG_CAN_SEEK_BACKWARD |
437            FLAG_CAN_SEEK_FORWARD |
438            FLAG_CAN_SEEK);
439
440    finishPrepareAsync();
441
442    ALOGV("onPrepareAsync: Done");
443}
444
445void NuPlayer::GenericSource::finishPrepareAsync() {
446    ALOGV("finishPrepareAsync");
447
448    status_t err = startSources();
449    if (err != OK) {
450        ALOGE("Failed to init start data source!");
451        notifyPreparedAndCleanup(err);
452        return;
453    }
454
455    if (mIsStreaming) {
456        if (mBufferingMonitorLooper == NULL) {
457            mBufferingMonitor->prepare(mCachedSource, mDurationUs, mBitrate,
458                    mIsStreaming);
459
460            mBufferingMonitorLooper = new ALooper;
461            mBufferingMonitorLooper->setName("GSBMonitor");
462            mBufferingMonitorLooper->start();
463            mBufferingMonitorLooper->registerHandler(mBufferingMonitor);
464        }
465
466        mBufferingMonitor->ensureCacheIsFetching();
467        mBufferingMonitor->restartPollBuffering();
468    } else {
469        notifyPrepared();
470    }
471}
472
473void NuPlayer::GenericSource::notifyPreparedAndCleanup(status_t err) {
474    if (err != OK) {
475        {
476            sp<DataSource> dataSource = mDataSource;
477            sp<NuCachedSource2> cachedSource = mCachedSource;
478            sp<DataSource> httpSource = mHttpSource;
479            {
480                Mutex::Autolock _l(mDisconnectLock);
481                mDataSource.clear();
482                mCachedSource.clear();
483                mHttpSource.clear();
484            }
485        }
486        mBitrate = -1;
487
488        mBufferingMonitor->cancelPollBuffering();
489    }
490    notifyPrepared(err);
491}
492
493void NuPlayer::GenericSource::start() {
494    ALOGI("start");
495
496    mStopRead = false;
497    if (mAudioTrack.mSource != NULL) {
498        postReadBuffer(MEDIA_TRACK_TYPE_AUDIO);
499    }
500
501    if (mVideoTrack.mSource != NULL) {
502        postReadBuffer(MEDIA_TRACK_TYPE_VIDEO);
503    }
504
505    mStarted = true;
506
507    (new AMessage(kWhatStart, this))->post();
508}
509
510void NuPlayer::GenericSource::stop() {
511    mStarted = false;
512}
513
514void NuPlayer::GenericSource::pause() {
515    mStarted = false;
516}
517
518void NuPlayer::GenericSource::resume() {
519    mStarted = true;
520
521    (new AMessage(kWhatResume, this))->post();
522}
523
524void NuPlayer::GenericSource::disconnect() {
525    sp<DataSource> dataSource, httpSource;
526    {
527        Mutex::Autolock _l(mDisconnectLock);
528        dataSource = mDataSource;
529        httpSource = mHttpSource;
530    }
531
532    if (dataSource != NULL) {
533        // disconnect data source
534        if (dataSource->flags() & DataSource::kIsCachingDataSource) {
535            static_cast<NuCachedSource2 *>(dataSource.get())->disconnect();
536        }
537    } else if (httpSource != NULL) {
538        static_cast<HTTPBase *>(httpSource.get())->disconnect();
539    }
540}
541
542status_t NuPlayer::GenericSource::feedMoreTSData() {
543    return OK;
544}
545
546void NuPlayer::GenericSource::onMessageReceived(const sp<AMessage> &msg) {
547    switch (msg->what()) {
548      case kWhatPrepareAsync:
549      {
550          onPrepareAsync();
551          break;
552      }
553      case kWhatFetchSubtitleData:
554      {
555          fetchTextData(kWhatSendSubtitleData, MEDIA_TRACK_TYPE_SUBTITLE,
556                  mFetchSubtitleDataGeneration, mSubtitleTrack.mPackets, msg);
557          break;
558      }
559
560      case kWhatFetchTimedTextData:
561      {
562          fetchTextData(kWhatSendTimedTextData, MEDIA_TRACK_TYPE_TIMEDTEXT,
563                  mFetchTimedTextDataGeneration, mTimedTextTrack.mPackets, msg);
564          break;
565      }
566
567      case kWhatSendSubtitleData:
568      {
569          sendTextData(kWhatSubtitleData, MEDIA_TRACK_TYPE_SUBTITLE,
570                  mFetchSubtitleDataGeneration, mSubtitleTrack.mPackets, msg);
571          break;
572      }
573
574      case kWhatSendGlobalTimedTextData:
575      {
576          sendGlobalTextData(kWhatTimedTextData, mFetchTimedTextDataGeneration, msg);
577          break;
578      }
579      case kWhatSendTimedTextData:
580      {
581          sendTextData(kWhatTimedTextData, MEDIA_TRACK_TYPE_TIMEDTEXT,
582                  mFetchTimedTextDataGeneration, mTimedTextTrack.mPackets, msg);
583          break;
584      }
585
586      case kWhatChangeAVSource:
587      {
588          int32_t trackIndex;
589          CHECK(msg->findInt32("trackIndex", &trackIndex));
590          const sp<IMediaSource> source = mSources.itemAt(trackIndex);
591
592          Track* track;
593          const char *mime;
594          media_track_type trackType, counterpartType;
595          sp<MetaData> meta = source->getFormat();
596          meta->findCString(kKeyMIMEType, &mime);
597          if (!strncasecmp(mime, "audio/", 6)) {
598              track = &mAudioTrack;
599              trackType = MEDIA_TRACK_TYPE_AUDIO;
600              counterpartType = MEDIA_TRACK_TYPE_VIDEO;;
601          } else {
602              CHECK(!strncasecmp(mime, "video/", 6));
603              track = &mVideoTrack;
604              trackType = MEDIA_TRACK_TYPE_VIDEO;
605              counterpartType = MEDIA_TRACK_TYPE_AUDIO;;
606          }
607
608
609          if (track->mSource != NULL) {
610              track->mSource->stop();
611          }
612          track->mSource = source;
613          track->mSource->start();
614          track->mIndex = trackIndex;
615
616          int64_t timeUs, actualTimeUs;
617          const bool formatChange = true;
618          if (trackType == MEDIA_TRACK_TYPE_AUDIO) {
619              timeUs = mAudioLastDequeueTimeUs;
620          } else {
621              timeUs = mVideoLastDequeueTimeUs;
622          }
623          readBuffer(trackType, timeUs, MediaPlayerSeekMode::SEEK_PREVIOUS_SYNC /* mode */,
624                  &actualTimeUs, formatChange);
625          readBuffer(counterpartType, -1, MediaPlayerSeekMode::SEEK_PREVIOUS_SYNC /* mode */,
626                  NULL, !formatChange);
627          ALOGV("timeUs %lld actualTimeUs %lld", (long long)timeUs, (long long)actualTimeUs);
628
629          break;
630      }
631
632      case kWhatStart:
633      case kWhatResume:
634      {
635          mBufferingMonitor->restartPollBuffering();
636          break;
637      }
638
639      case kWhatGetFormat:
640      {
641          onGetFormatMeta(msg);
642          break;
643      }
644
645      case kWhatGetSelectedTrack:
646      {
647          onGetSelectedTrack(msg);
648          break;
649      }
650
651      case kWhatGetTrackInfo:
652      {
653          onGetTrackInfo(msg);
654          break;
655      }
656
657      case kWhatSelectTrack:
658      {
659          onSelectTrack(msg);
660          break;
661      }
662
663      case kWhatSeek:
664      {
665          onSeek(msg);
666          break;
667      }
668
669      case kWhatReadBuffer:
670      {
671          onReadBuffer(msg);
672          break;
673      }
674
675      case kWhatPrepareDrm:
676      {
677          status_t status = onPrepareDrm(msg);
678          sp<AMessage> response = new AMessage;
679          response->setInt32("status", status);
680          sp<AReplyToken> replyID;
681          CHECK(msg->senderAwaitsResponse(&replyID));
682          response->postReply(replyID);
683          break;
684      }
685
686      default:
687          Source::onMessageReceived(msg);
688          break;
689    }
690}
691
692void NuPlayer::GenericSource::fetchTextData(
693        uint32_t sendWhat,
694        media_track_type type,
695        int32_t curGen,
696        const sp<AnotherPacketSource>& packets,
697        const sp<AMessage>& msg) {
698    int32_t msgGeneration;
699    CHECK(msg->findInt32("generation", &msgGeneration));
700    if (msgGeneration != curGen) {
701        // stale
702        return;
703    }
704
705    int32_t avail;
706    if (packets->hasBufferAvailable(&avail)) {
707        return;
708    }
709
710    int64_t timeUs;
711    CHECK(msg->findInt64("timeUs", &timeUs));
712
713    int64_t subTimeUs;
714    readBuffer(type, timeUs, MediaPlayerSeekMode::SEEK_PREVIOUS_SYNC /* mode */, &subTimeUs);
715
716    int64_t delayUs = subTimeUs - timeUs;
717    if (msg->what() == kWhatFetchSubtitleData) {
718        const int64_t oneSecUs = 1000000ll;
719        delayUs -= oneSecUs;
720    }
721    sp<AMessage> msg2 = new AMessage(sendWhat, this);
722    msg2->setInt32("generation", msgGeneration);
723    msg2->post(delayUs < 0 ? 0 : delayUs);
724}
725
726void NuPlayer::GenericSource::sendTextData(
727        uint32_t what,
728        media_track_type type,
729        int32_t curGen,
730        const sp<AnotherPacketSource>& packets,
731        const sp<AMessage>& msg) {
732    int32_t msgGeneration;
733    CHECK(msg->findInt32("generation", &msgGeneration));
734    if (msgGeneration != curGen) {
735        // stale
736        return;
737    }
738
739    int64_t subTimeUs;
740    if (packets->nextBufferTime(&subTimeUs) != OK) {
741        return;
742    }
743
744    int64_t nextSubTimeUs;
745    readBuffer(type, -1, MediaPlayerSeekMode::SEEK_PREVIOUS_SYNC /* mode */, &nextSubTimeUs);
746
747    sp<ABuffer> buffer;
748    status_t dequeueStatus = packets->dequeueAccessUnit(&buffer);
749    if (dequeueStatus == OK) {
750        sp<AMessage> notify = dupNotify();
751        notify->setInt32("what", what);
752        notify->setBuffer("buffer", buffer);
753        notify->post();
754
755        const int64_t delayUs = nextSubTimeUs - subTimeUs;
756        msg->post(delayUs < 0 ? 0 : delayUs);
757    }
758}
759
760void NuPlayer::GenericSource::sendGlobalTextData(
761        uint32_t what,
762        int32_t curGen,
763        sp<AMessage> msg) {
764    int32_t msgGeneration;
765    CHECK(msg->findInt32("generation", &msgGeneration));
766    if (msgGeneration != curGen) {
767        // stale
768        return;
769    }
770
771    uint32_t textType;
772    const void *data;
773    size_t size = 0;
774    if (mTimedTextTrack.mSource->getFormat()->findData(
775                    kKeyTextFormatData, &textType, &data, &size)) {
776        mGlobalTimedText = new ABuffer(size);
777        if (mGlobalTimedText->data()) {
778            memcpy(mGlobalTimedText->data(), data, size);
779            sp<AMessage> globalMeta = mGlobalTimedText->meta();
780            globalMeta->setInt64("timeUs", 0);
781            globalMeta->setString("mime", MEDIA_MIMETYPE_TEXT_3GPP);
782            globalMeta->setInt32("global", 1);
783            sp<AMessage> notify = dupNotify();
784            notify->setInt32("what", what);
785            notify->setBuffer("buffer", mGlobalTimedText);
786            notify->post();
787        }
788    }
789}
790
791sp<MetaData> NuPlayer::GenericSource::getFormatMeta(bool audio) {
792    sp<AMessage> msg = new AMessage(kWhatGetFormat, this);
793    msg->setInt32("audio", audio);
794
795    sp<AMessage> response;
796    sp<RefBase> format;
797    status_t err = msg->postAndAwaitResponse(&response);
798    if (err == OK && response != NULL) {
799        CHECK(response->findObject("format", &format));
800        return static_cast<MetaData*>(format.get());
801    } else {
802        return NULL;
803    }
804}
805
806void NuPlayer::GenericSource::onGetFormatMeta(const sp<AMessage>& msg) const {
807    int32_t audio;
808    CHECK(msg->findInt32("audio", &audio));
809
810    sp<AMessage> response = new AMessage;
811    sp<MetaData> format = doGetFormatMeta(audio);
812    response->setObject("format", format);
813
814    sp<AReplyToken> replyID;
815    CHECK(msg->senderAwaitsResponse(&replyID));
816    response->postReply(replyID);
817}
818
819sp<MetaData> NuPlayer::GenericSource::doGetFormatMeta(bool audio) const {
820    sp<IMediaSource> source = audio ? mAudioTrack.mSource : mVideoTrack.mSource;
821
822    if (source == NULL) {
823        return NULL;
824    }
825
826    return source->getFormat();
827}
828
829status_t NuPlayer::GenericSource::dequeueAccessUnit(
830        bool audio, sp<ABuffer> *accessUnit) {
831    if (audio && !mStarted) {
832        return -EWOULDBLOCK;
833    }
834
835    Track *track = audio ? &mAudioTrack : &mVideoTrack;
836
837    if (track->mSource == NULL) {
838        return -EWOULDBLOCK;
839    }
840
841    status_t finalResult;
842    if (!track->mPackets->hasBufferAvailable(&finalResult)) {
843        if (finalResult == OK) {
844            postReadBuffer(
845                    audio ? MEDIA_TRACK_TYPE_AUDIO : MEDIA_TRACK_TYPE_VIDEO);
846            return -EWOULDBLOCK;
847        }
848        return finalResult;
849    }
850
851    status_t result = track->mPackets->dequeueAccessUnit(accessUnit);
852
853    // start pulling in more buffers if we only have one (or no) buffer left
854    // so that decoder has less chance of being starved
855    if (track->mPackets->getAvailableBufferCount(&finalResult) < 2) {
856        postReadBuffer(audio? MEDIA_TRACK_TYPE_AUDIO : MEDIA_TRACK_TYPE_VIDEO);
857    }
858
859    if (result != OK) {
860        if (mSubtitleTrack.mSource != NULL) {
861            mSubtitleTrack.mPackets->clear();
862            mFetchSubtitleDataGeneration++;
863        }
864        if (mTimedTextTrack.mSource != NULL) {
865            mTimedTextTrack.mPackets->clear();
866            mFetchTimedTextDataGeneration++;
867        }
868        return result;
869    }
870
871    int64_t timeUs;
872    status_t eosResult; // ignored
873    CHECK((*accessUnit)->meta()->findInt64("timeUs", &timeUs));
874    if (audio) {
875        mAudioLastDequeueTimeUs = timeUs;
876        mBufferingMonitor->updateDequeuedBufferTime(timeUs);
877    } else {
878        mVideoLastDequeueTimeUs = timeUs;
879    }
880
881    if (mSubtitleTrack.mSource != NULL
882            && !mSubtitleTrack.mPackets->hasBufferAvailable(&eosResult)) {
883        sp<AMessage> msg = new AMessage(kWhatFetchSubtitleData, this);
884        msg->setInt64("timeUs", timeUs);
885        msg->setInt32("generation", mFetchSubtitleDataGeneration);
886        msg->post();
887    }
888
889    if (mTimedTextTrack.mSource != NULL
890            && !mTimedTextTrack.mPackets->hasBufferAvailable(&eosResult)) {
891        sp<AMessage> msg = new AMessage(kWhatFetchTimedTextData, this);
892        msg->setInt64("timeUs", timeUs);
893        msg->setInt32("generation", mFetchTimedTextDataGeneration);
894        msg->post();
895    }
896
897    return result;
898}
899
900status_t NuPlayer::GenericSource::getDuration(int64_t *durationUs) {
901    *durationUs = mDurationUs;
902    return OK;
903}
904
905size_t NuPlayer::GenericSource::getTrackCount() const {
906    return mSources.size();
907}
908
909sp<AMessage> NuPlayer::GenericSource::getTrackInfo(size_t trackIndex) const {
910    sp<AMessage> msg = new AMessage(kWhatGetTrackInfo, this);
911    msg->setSize("trackIndex", trackIndex);
912
913    sp<AMessage> response;
914    sp<RefBase> format;
915    status_t err = msg->postAndAwaitResponse(&response);
916    if (err == OK && response != NULL) {
917        CHECK(response->findObject("format", &format));
918        return static_cast<AMessage*>(format.get());
919    } else {
920        return NULL;
921    }
922}
923
924void NuPlayer::GenericSource::onGetTrackInfo(const sp<AMessage>& msg) const {
925    size_t trackIndex;
926    CHECK(msg->findSize("trackIndex", &trackIndex));
927
928    sp<AMessage> response = new AMessage;
929    sp<AMessage> format = doGetTrackInfo(trackIndex);
930    response->setObject("format", format);
931
932    sp<AReplyToken> replyID;
933    CHECK(msg->senderAwaitsResponse(&replyID));
934    response->postReply(replyID);
935}
936
937sp<AMessage> NuPlayer::GenericSource::doGetTrackInfo(size_t trackIndex) const {
938    size_t trackCount = mSources.size();
939    if (trackIndex >= trackCount) {
940        return NULL;
941    }
942
943    sp<AMessage> format = new AMessage();
944    sp<MetaData> meta = mSources.itemAt(trackIndex)->getFormat();
945    if (meta == NULL) {
946        ALOGE("no metadata for track %zu", trackIndex);
947        return NULL;
948    }
949
950    const char *mime;
951    CHECK(meta->findCString(kKeyMIMEType, &mime));
952    format->setString("mime", mime);
953
954    int32_t trackType;
955    if (!strncasecmp(mime, "video/", 6)) {
956        trackType = MEDIA_TRACK_TYPE_VIDEO;
957    } else if (!strncasecmp(mime, "audio/", 6)) {
958        trackType = MEDIA_TRACK_TYPE_AUDIO;
959    } else if (!strcasecmp(mime, MEDIA_MIMETYPE_TEXT_3GPP)) {
960        trackType = MEDIA_TRACK_TYPE_TIMEDTEXT;
961    } else {
962        trackType = MEDIA_TRACK_TYPE_UNKNOWN;
963    }
964    format->setInt32("type", trackType);
965
966    const char *lang;
967    if (!meta->findCString(kKeyMediaLanguage, &lang)) {
968        lang = "und";
969    }
970    format->setString("language", lang);
971
972    if (trackType == MEDIA_TRACK_TYPE_SUBTITLE) {
973        int32_t isAutoselect = 1, isDefault = 0, isForced = 0;
974        meta->findInt32(kKeyTrackIsAutoselect, &isAutoselect);
975        meta->findInt32(kKeyTrackIsDefault, &isDefault);
976        meta->findInt32(kKeyTrackIsForced, &isForced);
977
978        format->setInt32("auto", !!isAutoselect);
979        format->setInt32("default", !!isDefault);
980        format->setInt32("forced", !!isForced);
981    }
982
983    return format;
984}
985
986ssize_t NuPlayer::GenericSource::getSelectedTrack(media_track_type type) const {
987    sp<AMessage> msg = new AMessage(kWhatGetSelectedTrack, this);
988    msg->setInt32("type", type);
989
990    sp<AMessage> response;
991    int32_t index;
992    status_t err = msg->postAndAwaitResponse(&response);
993    if (err == OK && response != NULL) {
994        CHECK(response->findInt32("index", &index));
995        return index;
996    } else {
997        return -1;
998    }
999}
1000
1001void NuPlayer::GenericSource::onGetSelectedTrack(const sp<AMessage>& msg) const {
1002    int32_t tmpType;
1003    CHECK(msg->findInt32("type", &tmpType));
1004    media_track_type type = (media_track_type)tmpType;
1005
1006    sp<AMessage> response = new AMessage;
1007    ssize_t index = doGetSelectedTrack(type);
1008    response->setInt32("index", index);
1009
1010    sp<AReplyToken> replyID;
1011    CHECK(msg->senderAwaitsResponse(&replyID));
1012    response->postReply(replyID);
1013}
1014
1015ssize_t NuPlayer::GenericSource::doGetSelectedTrack(media_track_type type) const {
1016    const Track *track = NULL;
1017    switch (type) {
1018    case MEDIA_TRACK_TYPE_VIDEO:
1019        track = &mVideoTrack;
1020        break;
1021    case MEDIA_TRACK_TYPE_AUDIO:
1022        track = &mAudioTrack;
1023        break;
1024    case MEDIA_TRACK_TYPE_TIMEDTEXT:
1025        track = &mTimedTextTrack;
1026        break;
1027    case MEDIA_TRACK_TYPE_SUBTITLE:
1028        track = &mSubtitleTrack;
1029        break;
1030    default:
1031        break;
1032    }
1033
1034    if (track != NULL && track->mSource != NULL) {
1035        return track->mIndex;
1036    }
1037
1038    return -1;
1039}
1040
1041status_t NuPlayer::GenericSource::selectTrack(size_t trackIndex, bool select, int64_t timeUs) {
1042    ALOGV("%s track: %zu", select ? "select" : "deselect", trackIndex);
1043    sp<AMessage> msg = new AMessage(kWhatSelectTrack, this);
1044    msg->setInt32("trackIndex", trackIndex);
1045    msg->setInt32("select", select);
1046    msg->setInt64("timeUs", timeUs);
1047
1048    sp<AMessage> response;
1049    status_t err = msg->postAndAwaitResponse(&response);
1050    if (err == OK && response != NULL) {
1051        CHECK(response->findInt32("err", &err));
1052    }
1053
1054    return err;
1055}
1056
1057void NuPlayer::GenericSource::onSelectTrack(const sp<AMessage>& msg) {
1058    int32_t trackIndex, select;
1059    int64_t timeUs;
1060    CHECK(msg->findInt32("trackIndex", &trackIndex));
1061    CHECK(msg->findInt32("select", &select));
1062    CHECK(msg->findInt64("timeUs", &timeUs));
1063
1064    sp<AMessage> response = new AMessage;
1065    status_t err = doSelectTrack(trackIndex, select, timeUs);
1066    response->setInt32("err", err);
1067
1068    sp<AReplyToken> replyID;
1069    CHECK(msg->senderAwaitsResponse(&replyID));
1070    response->postReply(replyID);
1071}
1072
1073status_t NuPlayer::GenericSource::doSelectTrack(size_t trackIndex, bool select, int64_t timeUs) {
1074    if (trackIndex >= mSources.size()) {
1075        return BAD_INDEX;
1076    }
1077
1078    if (!select) {
1079        Track* track = NULL;
1080        if (mSubtitleTrack.mSource != NULL && trackIndex == mSubtitleTrack.mIndex) {
1081            track = &mSubtitleTrack;
1082            mFetchSubtitleDataGeneration++;
1083        } else if (mTimedTextTrack.mSource != NULL && trackIndex == mTimedTextTrack.mIndex) {
1084            track = &mTimedTextTrack;
1085            mFetchTimedTextDataGeneration++;
1086        }
1087        if (track == NULL) {
1088            return INVALID_OPERATION;
1089        }
1090        track->mSource->stop();
1091        track->mSource = NULL;
1092        track->mPackets->clear();
1093        return OK;
1094    }
1095
1096    const sp<IMediaSource> source = mSources.itemAt(trackIndex);
1097    sp<MetaData> meta = source->getFormat();
1098    const char *mime;
1099    CHECK(meta->findCString(kKeyMIMEType, &mime));
1100    if (!strncasecmp(mime, "text/", 5)) {
1101        bool isSubtitle = strcasecmp(mime, MEDIA_MIMETYPE_TEXT_3GPP);
1102        Track *track = isSubtitle ? &mSubtitleTrack : &mTimedTextTrack;
1103        if (track->mSource != NULL && track->mIndex == trackIndex) {
1104            return OK;
1105        }
1106        track->mIndex = trackIndex;
1107        if (track->mSource != NULL) {
1108            track->mSource->stop();
1109        }
1110        track->mSource = mSources.itemAt(trackIndex);
1111        track->mSource->start();
1112        if (track->mPackets == NULL) {
1113            track->mPackets = new AnotherPacketSource(track->mSource->getFormat());
1114        } else {
1115            track->mPackets->clear();
1116            track->mPackets->setFormat(track->mSource->getFormat());
1117
1118        }
1119
1120        if (isSubtitle) {
1121            mFetchSubtitleDataGeneration++;
1122        } else {
1123            mFetchTimedTextDataGeneration++;
1124        }
1125
1126        status_t eosResult; // ignored
1127        if (mSubtitleTrack.mSource != NULL
1128                && !mSubtitleTrack.mPackets->hasBufferAvailable(&eosResult)) {
1129            sp<AMessage> msg = new AMessage(kWhatFetchSubtitleData, this);
1130            msg->setInt64("timeUs", timeUs);
1131            msg->setInt32("generation", mFetchSubtitleDataGeneration);
1132            msg->post();
1133        }
1134
1135        sp<AMessage> msg2 = new AMessage(kWhatSendGlobalTimedTextData, this);
1136        msg2->setInt32("generation", mFetchTimedTextDataGeneration);
1137        msg2->post();
1138
1139        if (mTimedTextTrack.mSource != NULL
1140                && !mTimedTextTrack.mPackets->hasBufferAvailable(&eosResult)) {
1141            sp<AMessage> msg = new AMessage(kWhatFetchTimedTextData, this);
1142            msg->setInt64("timeUs", timeUs);
1143            msg->setInt32("generation", mFetchTimedTextDataGeneration);
1144            msg->post();
1145        }
1146
1147        return OK;
1148    } else if (!strncasecmp(mime, "audio/", 6) || !strncasecmp(mime, "video/", 6)) {
1149        bool audio = !strncasecmp(mime, "audio/", 6);
1150        Track *track = audio ? &mAudioTrack : &mVideoTrack;
1151        if (track->mSource != NULL && track->mIndex == trackIndex) {
1152            return OK;
1153        }
1154
1155        sp<AMessage> msg = new AMessage(kWhatChangeAVSource, this);
1156        msg->setInt32("trackIndex", trackIndex);
1157        msg->post();
1158        return OK;
1159    }
1160
1161    return INVALID_OPERATION;
1162}
1163
1164status_t NuPlayer::GenericSource::seekTo(int64_t seekTimeUs, MediaPlayerSeekMode mode) {
1165    sp<AMessage> msg = new AMessage(kWhatSeek, this);
1166    msg->setInt64("seekTimeUs", seekTimeUs);
1167    msg->setInt32("mode", mode);
1168
1169    sp<AMessage> response;
1170    status_t err = msg->postAndAwaitResponse(&response);
1171    if (err == OK && response != NULL) {
1172        CHECK(response->findInt32("err", &err));
1173    }
1174
1175    return err;
1176}
1177
1178void NuPlayer::GenericSource::onSeek(const sp<AMessage>& msg) {
1179    int64_t seekTimeUs;
1180    int32_t mode;
1181    CHECK(msg->findInt64("seekTimeUs", &seekTimeUs));
1182    CHECK(msg->findInt32("mode", &mode));
1183
1184    sp<AMessage> response = new AMessage;
1185    status_t err = doSeek(seekTimeUs, (MediaPlayerSeekMode)mode);
1186    response->setInt32("err", err);
1187
1188    sp<AReplyToken> replyID;
1189    CHECK(msg->senderAwaitsResponse(&replyID));
1190    response->postReply(replyID);
1191}
1192
1193status_t NuPlayer::GenericSource::doSeek(int64_t seekTimeUs, MediaPlayerSeekMode mode) {
1194    mBufferingMonitor->updateDequeuedBufferTime(-1ll);
1195
1196    // If the Widevine source is stopped, do not attempt to read any
1197    // more buffers.
1198    //
1199    // TODO: revisit after widevine is removed.  May be able to
1200    // combine mStopRead with mStarted.
1201    if (mStopRead) {
1202        return INVALID_OPERATION;
1203    }
1204    if (mVideoTrack.mSource != NULL) {
1205        int64_t actualTimeUs;
1206        readBuffer(MEDIA_TRACK_TYPE_VIDEO, seekTimeUs, mode, &actualTimeUs);
1207
1208        if (mode != MediaPlayerSeekMode::SEEK_CLOSEST) {
1209            seekTimeUs = actualTimeUs;
1210        }
1211        mVideoLastDequeueTimeUs = actualTimeUs;
1212    }
1213
1214    if (mAudioTrack.mSource != NULL) {
1215        readBuffer(MEDIA_TRACK_TYPE_AUDIO, seekTimeUs);
1216        mAudioLastDequeueTimeUs = seekTimeUs;
1217    }
1218
1219    // If currently buffering, post kWhatBufferingEnd first, so that
1220    // NuPlayer resumes. Otherwise, if cache hits high watermark
1221    // before new polling happens, no one will resume the playback.
1222    mBufferingMonitor->stopBufferingIfNecessary();
1223    mBufferingMonitor->restartPollBuffering();
1224
1225    return OK;
1226}
1227
1228sp<ABuffer> NuPlayer::GenericSource::mediaBufferToABuffer(
1229        MediaBuffer* mb,
1230        media_track_type trackType) {
1231    bool audio = trackType == MEDIA_TRACK_TYPE_AUDIO;
1232    size_t outLength = mb->range_length();
1233
1234    if (audio && mAudioIsVorbis) {
1235        outLength += sizeof(int32_t);
1236    }
1237
1238    sp<ABuffer> ab;
1239
1240    if (mIsDrmProtected)   {
1241        // Modular DRM
1242        // Enabled for both video/audio so 1) media buffer is reused without extra copying
1243        // 2) meta data can be retrieved in onInputBufferFetched for calling queueSecureInputBuffer.
1244
1245        // data is already provided in the buffer
1246        ab = new ABuffer(NULL, mb->range_length());
1247        mb->add_ref();
1248        ab->setMediaBufferBase(mb);
1249
1250        // Modular DRM: Required b/c of the above add_ref.
1251        // If ref>0, there must be an observer, or it'll crash at release().
1252        // TODO: MediaBuffer might need to be revised to ease such need.
1253        mb->setObserver(this);
1254        // setMediaBufferBase() interestingly doesn't increment the ref count on its own.
1255        // Extra increment (since we want to keep mb alive and attached to ab beyond this function
1256        // call. This is to counter the effect of mb->release() towards the end.
1257        mb->add_ref();
1258
1259    } else {
1260        ab = new ABuffer(outLength);
1261        memcpy(ab->data(),
1262               (const uint8_t *)mb->data() + mb->range_offset(),
1263               mb->range_length());
1264    }
1265
1266    if (audio && mAudioIsVorbis) {
1267        int32_t numPageSamples;
1268        if (!mb->meta_data()->findInt32(kKeyValidSamples, &numPageSamples)) {
1269            numPageSamples = -1;
1270        }
1271
1272        uint8_t* abEnd = ab->data() + mb->range_length();
1273        memcpy(abEnd, &numPageSamples, sizeof(numPageSamples));
1274    }
1275
1276    sp<AMessage> meta = ab->meta();
1277
1278    int64_t timeUs;
1279    CHECK(mb->meta_data()->findInt64(kKeyTime, &timeUs));
1280    meta->setInt64("timeUs", timeUs);
1281
1282    if (trackType == MEDIA_TRACK_TYPE_VIDEO) {
1283        int32_t layerId;
1284        if (mb->meta_data()->findInt32(kKeyTemporalLayerId, &layerId)) {
1285            meta->setInt32("temporal-layer-id", layerId);
1286        }
1287    }
1288
1289    if (trackType == MEDIA_TRACK_TYPE_TIMEDTEXT) {
1290        const char *mime;
1291        CHECK(mTimedTextTrack.mSource != NULL
1292                && mTimedTextTrack.mSource->getFormat()->findCString(kKeyMIMEType, &mime));
1293        meta->setString("mime", mime);
1294    }
1295
1296    int64_t durationUs;
1297    if (mb->meta_data()->findInt64(kKeyDuration, &durationUs)) {
1298        meta->setInt64("durationUs", durationUs);
1299    }
1300
1301    if (trackType == MEDIA_TRACK_TYPE_SUBTITLE) {
1302        meta->setInt32("trackIndex", mSubtitleTrack.mIndex);
1303    }
1304
1305    uint32_t dataType; // unused
1306    const void *seiData;
1307    size_t seiLength;
1308    if (mb->meta_data()->findData(kKeySEI, &dataType, &seiData, &seiLength)) {
1309        sp<ABuffer> sei = ABuffer::CreateAsCopy(seiData, seiLength);;
1310        meta->setBuffer("sei", sei);
1311    }
1312
1313    const void *mpegUserDataPointer;
1314    size_t mpegUserDataLength;
1315    if (mb->meta_data()->findData(
1316            kKeyMpegUserData, &dataType, &mpegUserDataPointer, &mpegUserDataLength)) {
1317        sp<ABuffer> mpegUserData = ABuffer::CreateAsCopy(mpegUserDataPointer, mpegUserDataLength);
1318        meta->setBuffer("mpegUserData", mpegUserData);
1319    }
1320
1321    mb->release();
1322    mb = NULL;
1323
1324    return ab;
1325}
1326
1327void NuPlayer::GenericSource::postReadBuffer(media_track_type trackType) {
1328    Mutex::Autolock _l(mReadBufferLock);
1329
1330    if ((mPendingReadBufferTypes & (1 << trackType)) == 0) {
1331        mPendingReadBufferTypes |= (1 << trackType);
1332        sp<AMessage> msg = new AMessage(kWhatReadBuffer, this);
1333        msg->setInt32("trackType", trackType);
1334        msg->post();
1335    }
1336}
1337
1338void NuPlayer::GenericSource::onReadBuffer(const sp<AMessage>& msg) {
1339    int32_t tmpType;
1340    CHECK(msg->findInt32("trackType", &tmpType));
1341    media_track_type trackType = (media_track_type)tmpType;
1342    readBuffer(trackType);
1343    {
1344        // only protect the variable change, as readBuffer may
1345        // take considerable time.
1346        Mutex::Autolock _l(mReadBufferLock);
1347        mPendingReadBufferTypes &= ~(1 << trackType);
1348    }
1349}
1350
1351void NuPlayer::GenericSource::readBuffer(
1352        media_track_type trackType, int64_t seekTimeUs, MediaPlayerSeekMode mode,
1353        int64_t *actualTimeUs, bool formatChange) {
1354    // Do not read data if Widevine source is stopped
1355    //
1356    // TODO: revisit after widevine is removed.  May be able to
1357    // combine mStopRead with mStarted.
1358    if (mStopRead) {
1359        return;
1360    }
1361    Track *track;
1362    size_t maxBuffers = 1;
1363    switch (trackType) {
1364        case MEDIA_TRACK_TYPE_VIDEO:
1365            track = &mVideoTrack;
1366            maxBuffers = 8;  // too large of a number may influence seeks
1367            break;
1368        case MEDIA_TRACK_TYPE_AUDIO:
1369            track = &mAudioTrack;
1370            maxBuffers = 64;
1371            break;
1372        case MEDIA_TRACK_TYPE_SUBTITLE:
1373            track = &mSubtitleTrack;
1374            break;
1375        case MEDIA_TRACK_TYPE_TIMEDTEXT:
1376            track = &mTimedTextTrack;
1377            break;
1378        default:
1379            TRESPASS();
1380    }
1381
1382    if (track->mSource == NULL) {
1383        return;
1384    }
1385
1386    if (actualTimeUs) {
1387        *actualTimeUs = seekTimeUs;
1388    }
1389
1390    MediaSource::ReadOptions options;
1391
1392    bool seeking = false;
1393    if (seekTimeUs >= 0) {
1394        options.setSeekTo(seekTimeUs, mode);
1395        seeking = true;
1396    }
1397
1398    const bool couldReadMultiple = (track->mSource->supportReadMultiple());
1399
1400    if (couldReadMultiple) {
1401        options.setNonBlocking();
1402    }
1403
1404    for (size_t numBuffers = 0; numBuffers < maxBuffers; ) {
1405        Vector<MediaBuffer *> mediaBuffers;
1406        status_t err = NO_ERROR;
1407
1408        if (couldReadMultiple) {
1409            err = track->mSource->readMultiple(
1410                    &mediaBuffers, maxBuffers - numBuffers, &options);
1411        } else {
1412            MediaBuffer *mbuf = NULL;
1413            err = track->mSource->read(&mbuf, &options);
1414            if (err == OK && mbuf != NULL) {
1415                mediaBuffers.push_back(mbuf);
1416            }
1417        }
1418
1419        options.clearNonPersistent();
1420
1421        size_t id = 0;
1422        size_t count = mediaBuffers.size();
1423        for (; id < count; ++id) {
1424            int64_t timeUs;
1425            MediaBuffer *mbuf = mediaBuffers[id];
1426            if (!mbuf->meta_data()->findInt64(kKeyTime, &timeUs)) {
1427                mbuf->meta_data()->dumpToLog();
1428                track->mPackets->signalEOS(ERROR_MALFORMED);
1429                break;
1430            }
1431            if (trackType == MEDIA_TRACK_TYPE_AUDIO) {
1432                mAudioTimeUs = timeUs;
1433                mBufferingMonitor->updateQueuedTime(true /* isAudio */, timeUs);
1434            } else if (trackType == MEDIA_TRACK_TYPE_VIDEO) {
1435                mVideoTimeUs = timeUs;
1436                mBufferingMonitor->updateQueuedTime(false /* isAudio */, timeUs);
1437            }
1438
1439            queueDiscontinuityIfNeeded(seeking, formatChange, trackType, track);
1440
1441            sp<ABuffer> buffer = mediaBufferToABuffer(mbuf, trackType);
1442            if (numBuffers == 0 && actualTimeUs != nullptr) {
1443                *actualTimeUs = timeUs;
1444            }
1445            if (seeking && buffer != nullptr) {
1446                sp<AMessage> meta = buffer->meta();
1447                if (meta != nullptr && mode == MediaPlayerSeekMode::SEEK_CLOSEST
1448                        && seekTimeUs > timeUs) {
1449                    sp<AMessage> extra = new AMessage;
1450                    extra->setInt64("resume-at-mediaTimeUs", seekTimeUs);
1451                    meta->setMessage("extra", extra);
1452                }
1453            }
1454
1455            track->mPackets->queueAccessUnit(buffer);
1456            formatChange = false;
1457            seeking = false;
1458            ++numBuffers;
1459        }
1460        if (id < count) {
1461            // Error, some mediaBuffer doesn't have kKeyTime.
1462            for (; id < count; ++id) {
1463                mediaBuffers[id]->release();
1464            }
1465            break;
1466        }
1467
1468        if (err == WOULD_BLOCK) {
1469            break;
1470        } else if (err == INFO_FORMAT_CHANGED) {
1471#if 0
1472            track->mPackets->queueDiscontinuity(
1473                    ATSParser::DISCONTINUITY_FORMATCHANGE,
1474                    NULL,
1475                    false /* discard */);
1476#endif
1477        } else if (err != OK) {
1478            queueDiscontinuityIfNeeded(seeking, formatChange, trackType, track);
1479            track->mPackets->signalEOS(err);
1480            break;
1481        }
1482    }
1483}
1484
1485void NuPlayer::GenericSource::queueDiscontinuityIfNeeded(
1486        bool seeking, bool formatChange, media_track_type trackType, Track *track) {
1487    // formatChange && seeking: track whose source is changed during selection
1488    // formatChange && !seeking: track whose source is not changed during selection
1489    // !formatChange: normal seek
1490    if ((seeking || formatChange)
1491            && (trackType == MEDIA_TRACK_TYPE_AUDIO
1492            || trackType == MEDIA_TRACK_TYPE_VIDEO)) {
1493        ATSParser::DiscontinuityType type = (formatChange && seeking)
1494                ? ATSParser::DISCONTINUITY_FORMATCHANGE
1495                : ATSParser::DISCONTINUITY_NONE;
1496        track->mPackets->queueDiscontinuity(type, NULL /* extra */, true /* discard */);
1497    }
1498}
1499
1500NuPlayer::GenericSource::BufferingMonitor::BufferingMonitor(const sp<AMessage> &notify)
1501    : mNotify(notify),
1502      mDurationUs(-1ll),
1503      mBitrate(-1ll),
1504      mIsStreaming(false),
1505      mAudioTimeUs(0),
1506      mVideoTimeUs(0),
1507      mPollBufferingGeneration(0),
1508      mPrepareBuffering(false),
1509      mBuffering(false),
1510      mPrevBufferPercentage(-1),
1511      mOffloadAudio(false),
1512      mFirstDequeuedBufferRealUs(-1ll),
1513      mFirstDequeuedBufferMediaUs(-1ll),
1514      mlastDequeuedBufferMediaUs(-1ll) {
1515      getDefaultBufferingSettings(&mSettings);
1516}
1517
1518NuPlayer::GenericSource::BufferingMonitor::~BufferingMonitor() {
1519}
1520
1521void NuPlayer::GenericSource::BufferingMonitor::getDefaultBufferingSettings(
1522        BufferingSettings *buffering /* nonnull */) {
1523    buffering->mInitialBufferingMode = BUFFERING_MODE_TIME_ONLY;
1524    buffering->mRebufferingMode = BUFFERING_MODE_TIME_THEN_SIZE;
1525    buffering->mInitialWatermarkMs = kHighWaterMarkMs;
1526    buffering->mRebufferingWatermarkLowMs = kLowWaterMarkMs;
1527    buffering->mRebufferingWatermarkHighMs = kHighWaterMarkRebufferMs;
1528    buffering->mRebufferingWatermarkLowKB = kLowWaterMarkKB;
1529    buffering->mRebufferingWatermarkHighKB = kHighWaterMarkKB;
1530
1531    ALOGV("BufferingMonitor::getDefaultBufferingSettings{%s}",
1532            buffering->toString().string());
1533}
1534
1535status_t NuPlayer::GenericSource::BufferingMonitor::setBufferingSettings(
1536        const BufferingSettings &buffering) {
1537    ALOGV("BufferingMonitor::setBufferingSettings{%s}",
1538            buffering.toString().string());
1539
1540    Mutex::Autolock _l(mLock);
1541    if (buffering.IsSizeBasedBufferingMode(buffering.mInitialBufferingMode)
1542            || (buffering.IsTimeBasedBufferingMode(buffering.mRebufferingMode)
1543                && buffering.mRebufferingWatermarkLowMs > buffering.mRebufferingWatermarkHighMs)
1544            || (buffering.IsSizeBasedBufferingMode(buffering.mRebufferingMode)
1545                && buffering.mRebufferingWatermarkLowKB > buffering.mRebufferingWatermarkHighKB)) {
1546        return BAD_VALUE;
1547    }
1548    mSettings = buffering;
1549    if (mSettings.mInitialBufferingMode == BUFFERING_MODE_NONE) {
1550        mSettings.mInitialWatermarkMs = BufferingSettings::kNoWatermark;
1551    }
1552    if (!mSettings.IsTimeBasedBufferingMode(mSettings.mRebufferingMode)) {
1553        mSettings.mRebufferingWatermarkLowMs = BufferingSettings::kNoWatermark;
1554        mSettings.mRebufferingWatermarkHighMs = INT32_MAX;
1555    }
1556    if (!mSettings.IsSizeBasedBufferingMode(mSettings.mRebufferingMode)) {
1557        mSettings.mRebufferingWatermarkLowKB = BufferingSettings::kNoWatermark;
1558        mSettings.mRebufferingWatermarkHighKB = INT32_MAX;
1559    }
1560    return OK;
1561}
1562
1563void NuPlayer::GenericSource::BufferingMonitor::prepare(
1564        const sp<NuCachedSource2> &cachedSource,
1565        int64_t durationUs,
1566        int64_t bitrate,
1567        bool isStreaming) {
1568    Mutex::Autolock _l(mLock);
1569    prepare_l(cachedSource, durationUs, bitrate, isStreaming);
1570}
1571
1572void NuPlayer::GenericSource::BufferingMonitor::stop() {
1573    Mutex::Autolock _l(mLock);
1574    prepare_l(NULL /* cachedSource */, -1 /* durationUs */,
1575            -1 /* bitrate */, false /* isStreaming */);
1576}
1577
1578void NuPlayer::GenericSource::BufferingMonitor::cancelPollBuffering() {
1579    Mutex::Autolock _l(mLock);
1580    cancelPollBuffering_l();
1581}
1582
1583void NuPlayer::GenericSource::BufferingMonitor::restartPollBuffering() {
1584    Mutex::Autolock _l(mLock);
1585    if (mIsStreaming) {
1586        cancelPollBuffering_l();
1587        onPollBuffering_l();
1588    }
1589}
1590
1591void NuPlayer::GenericSource::BufferingMonitor::stopBufferingIfNecessary() {
1592    Mutex::Autolock _l(mLock);
1593    stopBufferingIfNecessary_l();
1594}
1595
1596void NuPlayer::GenericSource::BufferingMonitor::ensureCacheIsFetching() {
1597    Mutex::Autolock _l(mLock);
1598    ensureCacheIsFetching_l();
1599}
1600
1601void NuPlayer::GenericSource::BufferingMonitor::updateQueuedTime(bool isAudio, int64_t timeUs) {
1602    Mutex::Autolock _l(mLock);
1603    if (isAudio) {
1604        mAudioTimeUs = timeUs;
1605    } else {
1606        mVideoTimeUs = timeUs;
1607    }
1608}
1609
1610void NuPlayer::GenericSource::BufferingMonitor::setOffloadAudio(bool offload) {
1611    Mutex::Autolock _l(mLock);
1612    mOffloadAudio = offload;
1613}
1614
1615void NuPlayer::GenericSource::BufferingMonitor::updateDequeuedBufferTime(int64_t mediaUs) {
1616    Mutex::Autolock _l(mLock);
1617    if (mediaUs < 0) {
1618        mFirstDequeuedBufferRealUs = -1ll;
1619        mFirstDequeuedBufferMediaUs = -1ll;
1620    } else if (mFirstDequeuedBufferRealUs < 0) {
1621        mFirstDequeuedBufferRealUs = ALooper::GetNowUs();
1622        mFirstDequeuedBufferMediaUs = mediaUs;
1623    }
1624    mlastDequeuedBufferMediaUs = mediaUs;
1625}
1626
1627void NuPlayer::GenericSource::BufferingMonitor::prepare_l(
1628        const sp<NuCachedSource2> &cachedSource,
1629        int64_t durationUs,
1630        int64_t bitrate,
1631        bool isStreaming) {
1632
1633    mCachedSource = cachedSource;
1634    mDurationUs = durationUs;
1635    mBitrate = bitrate;
1636    mIsStreaming = isStreaming;
1637    mAudioTimeUs = 0;
1638    mVideoTimeUs = 0;
1639    mPrepareBuffering = (cachedSource != NULL);
1640    cancelPollBuffering_l();
1641    mOffloadAudio = false;
1642    mFirstDequeuedBufferRealUs = -1ll;
1643    mFirstDequeuedBufferMediaUs = -1ll;
1644    mlastDequeuedBufferMediaUs = -1ll;
1645}
1646
1647void NuPlayer::GenericSource::BufferingMonitor::cancelPollBuffering_l() {
1648    mBuffering = false;
1649    ++mPollBufferingGeneration;
1650    mPrevBufferPercentage = -1;
1651}
1652
1653void NuPlayer::GenericSource::BufferingMonitor::notifyBufferingUpdate_l(int32_t percentage) {
1654    // Buffering percent could go backward as it's estimated from remaining
1655    // data and last access time. This could cause the buffering position
1656    // drawn on media control to jitter slightly. Remember previously reported
1657    // percentage and don't allow it to go backward.
1658    if (percentage < mPrevBufferPercentage) {
1659        percentage = mPrevBufferPercentage;
1660    } else if (percentage > 100) {
1661        percentage = 100;
1662    }
1663
1664    mPrevBufferPercentage = percentage;
1665
1666    ALOGV("notifyBufferingUpdate_l: buffering %d%%", percentage);
1667
1668    sp<AMessage> msg = mNotify->dup();
1669    msg->setInt32("what", kWhatBufferingUpdate);
1670    msg->setInt32("percentage", percentage);
1671    msg->post();
1672}
1673
1674void NuPlayer::GenericSource::BufferingMonitor::startBufferingIfNecessary_l() {
1675    if (mPrepareBuffering) {
1676        return;
1677    }
1678
1679    if (!mBuffering) {
1680        ALOGD("startBufferingIfNecessary_l");
1681
1682        mBuffering = true;
1683
1684        ensureCacheIsFetching_l();
1685        sendCacheStats_l();
1686
1687        sp<AMessage> notify = mNotify->dup();
1688        notify->setInt32("what", kWhatPauseOnBufferingStart);
1689        notify->post();
1690    }
1691}
1692
1693void NuPlayer::GenericSource::BufferingMonitor::stopBufferingIfNecessary_l() {
1694    if (mPrepareBuffering) {
1695        ALOGD("stopBufferingIfNecessary_l, mBuffering=%d", mBuffering);
1696
1697        mPrepareBuffering = false;
1698
1699        sp<AMessage> notify = mNotify->dup();
1700        notify->setInt32("what", kWhatPrepared);
1701        notify->setInt32("err", OK);
1702        notify->post();
1703
1704        return;
1705    }
1706
1707    if (mBuffering) {
1708        ALOGD("stopBufferingIfNecessary_l");
1709        mBuffering = false;
1710
1711        sendCacheStats_l();
1712
1713        sp<AMessage> notify = mNotify->dup();
1714        notify->setInt32("what", kWhatResumeOnBufferingEnd);
1715        notify->post();
1716    }
1717}
1718
1719void NuPlayer::GenericSource::BufferingMonitor::sendCacheStats_l() {
1720    int32_t kbps = 0;
1721    status_t err = UNKNOWN_ERROR;
1722
1723    if (mCachedSource != NULL) {
1724        err = mCachedSource->getEstimatedBandwidthKbps(&kbps);
1725    }
1726
1727    if (err == OK) {
1728        sp<AMessage> notify = mNotify->dup();
1729        notify->setInt32("what", kWhatCacheStats);
1730        notify->setInt32("bandwidth", kbps);
1731        notify->post();
1732    }
1733}
1734
1735void NuPlayer::GenericSource::BufferingMonitor::ensureCacheIsFetching_l() {
1736    if (mCachedSource != NULL) {
1737        mCachedSource->resumeFetchingIfNecessary();
1738    }
1739}
1740
1741void NuPlayer::GenericSource::BufferingMonitor::schedulePollBuffering_l() {
1742    sp<AMessage> msg = new AMessage(kWhatPollBuffering, this);
1743    msg->setInt32("generation", mPollBufferingGeneration);
1744    // Enquires buffering status every second.
1745    msg->post(1000000ll);
1746}
1747
1748int64_t NuPlayer::GenericSource::BufferingMonitor::getLastReadPosition_l() {
1749    if (mAudioTimeUs > 0) {
1750        return mAudioTimeUs;
1751    } else if (mVideoTimeUs > 0) {
1752        return mVideoTimeUs;
1753    } else {
1754        return 0;
1755    }
1756}
1757
1758void NuPlayer::GenericSource::BufferingMonitor::onPollBuffering_l() {
1759    status_t finalStatus = UNKNOWN_ERROR;
1760    int64_t cachedDurationUs = -1ll;
1761    ssize_t cachedDataRemaining = -1;
1762
1763    if (mCachedSource != NULL) {
1764        cachedDataRemaining =
1765                mCachedSource->approxDataRemaining(&finalStatus);
1766
1767        if (finalStatus == OK) {
1768            off64_t size;
1769            int64_t bitrate = 0ll;
1770            if (mDurationUs > 0 && mCachedSource->getSize(&size) == OK) {
1771                // |bitrate| uses bits/second unit, while size is number of bytes.
1772                bitrate = size * 8000000ll / mDurationUs;
1773            } else if (mBitrate > 0) {
1774                bitrate = mBitrate;
1775            }
1776            if (bitrate > 0) {
1777                cachedDurationUs = cachedDataRemaining * 8000000ll / bitrate;
1778            }
1779        }
1780    }
1781
1782    if (finalStatus != OK) {
1783        ALOGV("onPollBuffering_l: EOS (finalStatus = %d)", finalStatus);
1784
1785        if (finalStatus == ERROR_END_OF_STREAM) {
1786            notifyBufferingUpdate_l(100);
1787        }
1788
1789        stopBufferingIfNecessary_l();
1790        return;
1791    }
1792
1793    if (cachedDurationUs >= 0ll) {
1794        if (mDurationUs > 0ll) {
1795            int64_t cachedPosUs = getLastReadPosition_l() + cachedDurationUs;
1796            int percentage = 100.0 * cachedPosUs / mDurationUs;
1797            if (percentage > 100) {
1798                percentage = 100;
1799            }
1800
1801            notifyBufferingUpdate_l(percentage);
1802        }
1803
1804        ALOGV("onPollBuffering_l: cachedDurationUs %.1f sec", cachedDurationUs / 1000000.0f);
1805
1806        if (mPrepareBuffering) {
1807            if (cachedDurationUs > mSettings.mInitialWatermarkMs * 1000) {
1808                stopBufferingIfNecessary_l();
1809            }
1810        } else if (mSettings.IsTimeBasedBufferingMode(mSettings.mRebufferingMode)) {
1811            if (cachedDurationUs < mSettings.mRebufferingWatermarkLowMs * 1000) {
1812                // Take into account the data cached in downstream components to try to avoid
1813                // unnecessary pause.
1814                if (mOffloadAudio && mFirstDequeuedBufferRealUs >= 0) {
1815                    int64_t downStreamCacheUs =
1816                        mlastDequeuedBufferMediaUs - mFirstDequeuedBufferMediaUs
1817                            - (ALooper::GetNowUs() - mFirstDequeuedBufferRealUs);
1818                    if (downStreamCacheUs > 0) {
1819                        cachedDurationUs += downStreamCacheUs;
1820                    }
1821                }
1822
1823                if (cachedDurationUs < mSettings.mRebufferingWatermarkLowMs * 1000) {
1824                    startBufferingIfNecessary_l();
1825                }
1826            } else if (cachedDurationUs > mSettings.mRebufferingWatermarkHighMs * 1000) {
1827                stopBufferingIfNecessary_l();
1828            }
1829        }
1830    } else if (cachedDataRemaining >= 0
1831            && mSettings.IsSizeBasedBufferingMode(mSettings.mRebufferingMode)) {
1832        ALOGV("onPollBuffering_l: cachedDataRemaining %zd bytes",
1833                cachedDataRemaining);
1834
1835        if (cachedDataRemaining < (mSettings.mRebufferingWatermarkLowKB << 10)) {
1836            startBufferingIfNecessary_l();
1837        } else if (cachedDataRemaining > (mSettings.mRebufferingWatermarkHighKB << 10)) {
1838            stopBufferingIfNecessary_l();
1839        }
1840    }
1841
1842    schedulePollBuffering_l();
1843}
1844
1845void NuPlayer::GenericSource::BufferingMonitor::onMessageReceived(const sp<AMessage> &msg) {
1846    switch (msg->what()) {
1847      case kWhatPollBuffering:
1848      {
1849          int32_t generation;
1850          CHECK(msg->findInt32("generation", &generation));
1851          Mutex::Autolock _l(mLock);
1852          if (generation == mPollBufferingGeneration) {
1853              onPollBuffering_l();
1854          }
1855          break;
1856      }
1857      default:
1858          TRESPASS();
1859          break;
1860    }
1861}
1862
1863// Modular DRM
1864status_t NuPlayer::GenericSource::prepareDrm(
1865        const uint8_t uuid[16], const Vector<uint8_t> &drmSessionId, sp<ICrypto> *crypto)
1866{
1867    ALOGV("prepareDrm");
1868
1869    sp<AMessage> msg = new AMessage(kWhatPrepareDrm, this);
1870    // synchronous call so just passing the address but with local copies of "const" args
1871    uint8_t UUID[16];
1872    memcpy(UUID, uuid, sizeof(UUID));
1873    Vector<uint8_t> sessionId = drmSessionId;
1874    msg->setPointer("uuid", (void*)UUID);
1875    msg->setPointer("drmSessionId", (void*)&sessionId);
1876    msg->setPointer("crypto", (void*)crypto);
1877
1878    sp<AMessage> response;
1879    status_t status = msg->postAndAwaitResponse(&response);
1880
1881    if (status == OK && response != NULL) {
1882        CHECK(response->findInt32("status", &status));
1883        ALOGV_IF(status == OK, "prepareDrm: mCrypto: %p (%d)", crypto->get(),
1884                (*crypto != NULL ? (*crypto)->getStrongCount() : 0));
1885        ALOGD("prepareDrm ret: %d ", status);
1886    } else {
1887        ALOGE("prepareDrm err: %d", status);
1888    }
1889
1890    return status;
1891}
1892
1893status_t NuPlayer::GenericSource::onPrepareDrm(const sp<AMessage> &msg)
1894{
1895    ALOGV("onPrepareDrm ");
1896
1897    mIsDrmProtected = false;
1898    mIsSecure = false;
1899
1900    uint8_t *uuid;
1901    Vector<uint8_t> *drmSessionId;
1902    sp<ICrypto> *outCrypto;
1903    CHECK(msg->findPointer("uuid", (void**)&uuid));
1904    CHECK(msg->findPointer("drmSessionId", (void**)&drmSessionId));
1905    CHECK(msg->findPointer("crypto", (void**)&outCrypto));
1906
1907    status_t status = OK;
1908    sp<ICrypto> crypto = NuPlayerDrm::createCryptoAndPlugin(uuid, *drmSessionId, status);
1909    if (crypto == NULL) {
1910        ALOGE("onPrepareDrm: createCrypto failed. status: %d", status);
1911        return status;
1912    }
1913    ALOGV("onPrepareDrm: createCryptoAndPlugin succeeded for uuid: %s",
1914            DrmUUID::toHexString(uuid).string());
1915
1916    *outCrypto = crypto;
1917    // as long a there is an active crypto
1918    mIsDrmProtected = true;
1919
1920    if (mMimes.size() == 0) {
1921        status = UNKNOWN_ERROR;
1922        ALOGE("onPrepareDrm: Unexpected. Must have at least one track. status: %d", status);
1923        return status;
1924    }
1925
1926    // first mime in this list is either the video track, or the first audio track
1927    const char *mime = mMimes[0].string();
1928    mIsSecure = crypto->requiresSecureDecoderComponent(mime);
1929    ALOGV("onPrepareDrm: requiresSecureDecoderComponent mime: %s  isSecure: %d",
1930            mime, mIsSecure);
1931
1932    // Checking the member flags while in the looper to send out the notification.
1933    // The legacy mDecryptHandle!=NULL check (for FLAG_PROTECTED) is equivalent to mIsDrmProtected.
1934    notifyFlagsChanged(
1935            (mIsSecure ? FLAG_SECURE : 0) |
1936            (mIsDrmProtected ? FLAG_PROTECTED : 0) |
1937            FLAG_CAN_PAUSE |
1938            FLAG_CAN_SEEK_BACKWARD |
1939            FLAG_CAN_SEEK_FORWARD |
1940            FLAG_CAN_SEEK);
1941
1942    return status;
1943}
1944
1945status_t NuPlayer::GenericSource::checkDrmInfo()
1946{
1947    if (mFileMeta == NULL) {
1948        ALOGI("checkDrmInfo: No metadata");
1949        return OK; // letting the caller responds accordingly
1950    }
1951
1952    uint32_t type;
1953    const void *pssh;
1954    size_t psshsize;
1955
1956    if (!mFileMeta->findData(kKeyPssh, &type, &pssh, &psshsize)) {
1957        ALOGE("checkDrmInfo: No PSSH");
1958        return OK; // source without DRM info
1959    }
1960
1961    Parcel parcel;
1962    NuPlayerDrm::retrieveDrmInfo(pssh, psshsize, mMimes, &parcel);
1963    ALOGV("checkDrmInfo: MEDIA_DRM_INFO PSSH size: %d  Parcel size: %d  objects#: %d",
1964          (int)psshsize, (int)parcel.dataSize(), (int)parcel.objectsCount());
1965
1966    if (parcel.dataSize() == 0) {
1967        ALOGE("checkDrmInfo: Unexpected parcel size: 0");
1968        return UNKNOWN_ERROR;
1969    }
1970
1971    // Can't pass parcel as a message to the player. Converting Parcel->ABuffer to pass it
1972    // to the Player's onSourceNotify then back to Parcel for calling driver's notifyListener.
1973    sp<ABuffer> drmInfoBuffer = ABuffer::CreateAsCopy(parcel.data(), parcel.dataSize());
1974    notifyDrmInfo(drmInfoBuffer);
1975
1976    return OK;
1977}
1978
1979void NuPlayer::GenericSource::signalBufferReturned(MediaBuffer *buffer)
1980{
1981    //ALOGV("signalBufferReturned %p  refCount: %d", buffer, buffer->localRefcount());
1982
1983    buffer->setObserver(NULL);
1984    buffer->release(); // this leads to delete since that there is no observor
1985}
1986
1987}  // namespace android
1988