GenericSource.cpp revision c367ca1762278277fb7a7d1156ce6e193ab524a3 
1/*
2 * Copyright (C) 2012 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17//#define LOG_NDEBUG 0
18#define LOG_TAG "GenericSource"
19
20#include "GenericSource.h"
21
22#include "AnotherPacketSource.h"
23
24#include <media/IMediaHTTPService.h>
25#include <media/stagefright/foundation/ABuffer.h>
26#include <media/stagefright/foundation/ADebug.h>
27#include <media/stagefright/foundation/AMessage.h>
28#include <media/stagefright/DataSource.h>
29#include <media/stagefright/FileSource.h>
30#include <media/stagefright/MediaBuffer.h>
31#include <media/stagefright/MediaDefs.h>
32#include <media/stagefright/MediaExtractor.h>
33#include <media/stagefright/MediaSource.h>
34#include <media/stagefright/MetaData.h>
35#include <media/stagefright/Utils.h>
36#include "../../libstagefright/include/DRMExtractor.h"
37#include "../../libstagefright/include/NuCachedSource2.h"
38#include "../../libstagefright/include/WVMExtractor.h"
39#include "../../libstagefright/include/HTTPBase.h"
40
41namespace android {
42
43static int64_t kLowWaterMarkUs = 2000000ll;  // 2secs
44static int64_t kHighWaterMarkUs = 5000000ll;  // 5secs
45static const ssize_t kLowWaterMarkBytes = 40000;
46static const ssize_t kHighWaterMarkBytes = 200000;
47
48NuPlayer::GenericSource::GenericSource(
49        const sp<AMessage> &notify,
50        bool uidValid,
51        uid_t uid)
52    : Source(notify),
53      mAudioTimeUs(0),
54      mAudioLastDequeueTimeUs(0),
55      mVideoTimeUs(0),
56      mVideoLastDequeueTimeUs(0),
57      mFetchSubtitleDataGeneration(0),
58      mFetchTimedTextDataGeneration(0),
59      mDurationUs(-1ll),
60      mAudioIsVorbis(false),
61      mIsWidevine(false),
62      mIsSecure(false),
63      mIsStreaming(false),
64      mUIDValid(uidValid),
65      mUID(uid),
66      mFd(-1),
67      mDrmManagerClient(NULL),
68      mBitrate(-1ll),
69      mPollBufferingGeneration(0),
70      mPendingReadBufferTypes(0),
71      mBuffering(false),
72      mPrepareBuffering(false),
73      mPrevBufferPercentage(-1) {
74    resetDataSource();
75    DataSource::RegisterDefaultSniffers();
76}
77
78void NuPlayer::GenericSource::resetDataSource() {
79    mHTTPService.clear();
80    mHttpSource.clear();
81    mUri.clear();
82    mUriHeaders.clear();
83    if (mFd >= 0) {
84        close(mFd);
85        mFd = -1;
86    }
87    mOffset = 0;
88    mLength = 0;
89    setDrmPlaybackStatusIfNeeded(Playback::STOP, 0);
90    mDecryptHandle = NULL;
91    mDrmManagerClient = NULL;
92    mStarted = false;
93    mStopRead = true;
94}
95
96status_t NuPlayer::GenericSource::setDataSource(
97        const sp<IMediaHTTPService> &httpService,
98        const char *url,
99        const KeyedVector<String8, String8> *headers) {
100    resetDataSource();
101
102    mHTTPService = httpService;
103    mUri = url;
104
105    if (headers) {
106        mUriHeaders = *headers;
107    }
108
109    // delay data source creation to prepareAsync() to avoid blocking
110    // the calling thread in setDataSource for any significant time.
111    return OK;
112}
113
114status_t NuPlayer::GenericSource::setDataSource(
115        int fd, int64_t offset, int64_t length) {
116    resetDataSource();
117
118    mFd = dup(fd);
119    mOffset = offset;
120    mLength = length;
121
122    // delay data source creation to prepareAsync() to avoid blocking
123    // the calling thread in setDataSource for any significant time.
124    return OK;
125}
126
127status_t NuPlayer::GenericSource::setDataSource(const sp<DataSource>& source) {
128    resetDataSource();
129    mDataSource = source;
130    return OK;
131}
132
133sp<MetaData> NuPlayer::GenericSource::getFileFormatMeta() const {
134    return mFileMeta;
135}
136
137status_t NuPlayer::GenericSource::initFromDataSource() {
138    sp<MediaExtractor> extractor;
139    String8 mimeType;
140    float confidence;
141    sp<AMessage> dummy;
142    bool isWidevineStreaming = false;
143
144    CHECK(mDataSource != NULL);
145
146    if (mIsWidevine) {
147        isWidevineStreaming = SniffWVM(
148                mDataSource, &mimeType, &confidence, &dummy);
149        if (!isWidevineStreaming ||
150                strcasecmp(
151                    mimeType.string(), MEDIA_MIMETYPE_CONTAINER_WVM)) {
152            ALOGE("unsupported widevine mime: %s", mimeType.string());
153            return UNKNOWN_ERROR;
154        }
155    } else if (mIsStreaming) {
156        if (!mDataSource->sniff(&mimeType, &confidence, &dummy)) {
157            return UNKNOWN_ERROR;
158        }
159        isWidevineStreaming = !strcasecmp(
160                mimeType.string(), MEDIA_MIMETYPE_CONTAINER_WVM);
161    }
162
163    if (isWidevineStreaming) {
164        // we don't want cached source for widevine streaming.
165        mCachedSource.clear();
166        mDataSource = mHttpSource;
167        mWVMExtractor = new WVMExtractor(mDataSource);
168        mWVMExtractor->setAdaptiveStreamingMode(true);
169        if (mUIDValid) {
170            mWVMExtractor->setUID(mUID);
171        }
172        extractor = mWVMExtractor;
173    } else {
174        extractor = MediaExtractor::Create(mDataSource,
175                mimeType.isEmpty() ? NULL : mimeType.string());
176    }
177
178    if (extractor == NULL) {
179        return UNKNOWN_ERROR;
180    }
181
182    if (extractor->getDrmFlag()) {
183        checkDrmStatus(mDataSource);
184    }
185
186    mFileMeta = extractor->getMetaData();
187    if (mFileMeta != NULL) {
188        int64_t duration;
189        if (mFileMeta->findInt64(kKeyDuration, &duration)) {
190            mDurationUs = duration;
191        }
192
193        if (!mIsWidevine) {
194            // Check mime to see if we actually have a widevine source.
195            // If the data source is not URL-type (eg. file source), we
196            // won't be able to tell until now.
197            const char *fileMime;
198            if (mFileMeta->findCString(kKeyMIMEType, &fileMime)
199                    && !strncasecmp(fileMime, "video/wvm", 9)) {
200                mIsWidevine = true;
201            }
202        }
203    }
204
205    int32_t totalBitrate = 0;
206
207    size_t numtracks = extractor->countTracks();
208    if (numtracks == 0) {
209        return UNKNOWN_ERROR;
210    }
211
212    for (size_t i = 0; i < numtracks; ++i) {
213        sp<MediaSource> track = extractor->getTrack(i);
214        if (track == NULL) {
215            continue;
216        }
217
218        sp<MetaData> meta = extractor->getTrackMetaData(i);
219        if (meta == NULL) {
220            ALOGE("no metadata for track %zu", i);
221            return UNKNOWN_ERROR;
222        }
223
224        const char *mime;
225        CHECK(meta->findCString(kKeyMIMEType, &mime));
226
227        // Do the string compare immediately with "mime",
228        // we can't assume "mime" would stay valid after another
229        // extractor operation, some extractors might modify meta
230        // during getTrack() and make it invalid.
231        if (!strncasecmp(mime, "audio/", 6)) {
232            if (mAudioTrack.mSource == NULL) {
233                mAudioTrack.mIndex = i;
234                mAudioTrack.mSource = track;
235                mAudioTrack.mPackets =
236                    new AnotherPacketSource(mAudioTrack.mSource->getFormat());
237
238                if (!strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_VORBIS)) {
239                    mAudioIsVorbis = true;
240                } else {
241                    mAudioIsVorbis = false;
242                }
243            }
244        } else if (!strncasecmp(mime, "video/", 6)) {
245            if (mVideoTrack.mSource == NULL) {
246                mVideoTrack.mIndex = i;
247                mVideoTrack.mSource = track;
248                mVideoTrack.mPackets =
249                    new AnotherPacketSource(mVideoTrack.mSource->getFormat());
250
251                // check if the source requires secure buffers
252                int32_t secure;
253                if (meta->findInt32(kKeyRequiresSecureBuffers, &secure)
254                        && secure) {
255                    mIsSecure = true;
256                    if (mUIDValid) {
257                        extractor->setUID(mUID);
258                    }
259                }
260            }
261        }
262
263        mSources.push(track);
264        int64_t durationUs;
265        if (meta->findInt64(kKeyDuration, &durationUs)) {
266            if (durationUs > mDurationUs) {
267                mDurationUs = durationUs;
268            }
269        }
270
271        int32_t bitrate;
272        if (totalBitrate >= 0 && meta->findInt32(kKeyBitRate, &bitrate)) {
273            totalBitrate += bitrate;
274        } else {
275            totalBitrate = -1;
276        }
277    }
278
279    if (mSources.size() == 0) {
280        ALOGE("b/23705695");
281        return UNKNOWN_ERROR;
282    }
283
284    mBitrate = totalBitrate;
285
286    return OK;
287}
288
289status_t NuPlayer::GenericSource::startSources() {
290    // Start the selected A/V tracks now before we start buffering.
291    // Widevine sources might re-initialize crypto when starting, if we delay
292    // this to start(), all data buffered during prepare would be wasted.
293    // (We don't actually start reading until start().)
294    if (mAudioTrack.mSource != NULL && mAudioTrack.mSource->start() != OK) {
295        ALOGE("failed to start audio track!");
296        return UNKNOWN_ERROR;
297    }
298
299    if (mVideoTrack.mSource != NULL && mVideoTrack.mSource->start() != OK) {
300        ALOGE("failed to start video track!");
301        return UNKNOWN_ERROR;
302    }
303
304    return OK;
305}
306
307void NuPlayer::GenericSource::checkDrmStatus(const sp<DataSource>& dataSource) {
308    dataSource->getDrmInfo(mDecryptHandle, &mDrmManagerClient);
309    if (mDecryptHandle != NULL) {
310        CHECK(mDrmManagerClient);
311        if (RightsStatus::RIGHTS_VALID != mDecryptHandle->status) {
312            sp<AMessage> msg = dupNotify();
313            msg->setInt32("what", kWhatDrmNoLicense);
314            msg->post();
315        }
316    }
317}
318
319int64_t NuPlayer::GenericSource::getLastReadPosition() {
320    if (mAudioTrack.mSource != NULL) {
321        return mAudioTimeUs;
322    } else if (mVideoTrack.mSource != NULL) {
323        return mVideoTimeUs;
324    } else {
325        return 0;
326    }
327}
328
329status_t NuPlayer::GenericSource::setBuffers(
330        bool audio, Vector<MediaBuffer *> &buffers) {
331    if (mIsSecure && !audio && mVideoTrack.mSource != NULL) {
332        return mVideoTrack.mSource->setBuffers(buffers);
333    }
334    return INVALID_OPERATION;
335}
336
337bool NuPlayer::GenericSource::isStreaming() const {
338    return mIsStreaming;
339}
340
341NuPlayer::GenericSource::~GenericSource() {
342    if (mLooper != NULL) {
343        mLooper->unregisterHandler(id());
344        mLooper->stop();
345    }
346    resetDataSource();
347}
348
349void NuPlayer::GenericSource::prepareAsync() {
350    if (mLooper == NULL) {
351        mLooper = new ALooper;
352        mLooper->setName("generic");
353        mLooper->start();
354
355        mLooper->registerHandler(this);
356    }
357
358    sp<AMessage> msg = new AMessage(kWhatPrepareAsync, this);
359    msg->post();
360}
361
362void NuPlayer::GenericSource::onPrepareAsync() {
363    // delayed data source creation
364    if (mDataSource == NULL) {
365        // set to false first, if the extractor
366        // comes back as secure, set it to true then.
367        mIsSecure = false;
368
369        if (!mUri.empty()) {
370            const char* uri = mUri.c_str();
371            String8 contentType;
372            mIsWidevine = !strncasecmp(uri, "widevine://", 11);
373
374            if (!strncasecmp("http://", uri, 7)
375                    || !strncasecmp("https://", uri, 8)
376                    || mIsWidevine) {
377                mHttpSource = DataSource::CreateMediaHTTP(mHTTPService);
378                if (mHttpSource == NULL) {
379                    ALOGE("Failed to create http source!");
380                    notifyPreparedAndCleanup(UNKNOWN_ERROR);
381                    return;
382                }
383            }
384
385            mDataSource = DataSource::CreateFromURI(
386                   mHTTPService, uri, &mUriHeaders, &contentType,
387                   static_cast<HTTPBase *>(mHttpSource.get()));
388        } else {
389            mIsWidevine = false;
390
391            mDataSource = new FileSource(mFd, mOffset, mLength);
392            mFd = -1;
393        }
394
395        if (mDataSource == NULL) {
396            ALOGE("Failed to create data source!");
397            notifyPreparedAndCleanup(UNKNOWN_ERROR);
398            return;
399        }
400    }
401
402    if (mDataSource->flags() & DataSource::kIsCachingDataSource) {
403        mCachedSource = static_cast<NuCachedSource2 *>(mDataSource.get());
404    }
405
406    // For widevine or other cached streaming cases, we need to wait for
407    // enough buffering before reporting prepared.
408    // Note that even when URL doesn't start with widevine://, mIsWidevine
409    // could still be set to true later, if the streaming or file source
410    // is sniffed to be widevine. We don't want to buffer for file source
411    // in that case, so must check the flag now.
412    mIsStreaming = (mIsWidevine || mCachedSource != NULL);
413
414    // init extractor from data source
415    status_t err = initFromDataSource();
416
417    if (err != OK) {
418        ALOGE("Failed to init from data source!");
419        notifyPreparedAndCleanup(err);
420        return;
421    }
422
423    if (mVideoTrack.mSource != NULL) {
424        sp<MetaData> meta = doGetFormatMeta(false /* audio */);
425        sp<AMessage> msg = new AMessage;
426        err = convertMetaDataToMessage(meta, &msg);
427        if(err != OK) {
428            notifyPreparedAndCleanup(err);
429            return;
430        }
431        notifyVideoSizeChanged(msg);
432    }
433
434    notifyFlagsChanged(
435            (mIsSecure ? FLAG_SECURE : 0)
436            | (mDecryptHandle != NULL ? FLAG_PROTECTED : 0)
437            | FLAG_CAN_PAUSE
438            | FLAG_CAN_SEEK_BACKWARD
439            | FLAG_CAN_SEEK_FORWARD
440            | FLAG_CAN_SEEK);
441
442    if (mIsSecure) {
443        // secure decoders must be instantiated before starting widevine source
444        sp<AMessage> reply = new AMessage(kWhatSecureDecodersInstantiated, this);
445        notifyInstantiateSecureDecoders(reply);
446    } else {
447        finishPrepareAsync();
448    }
449}
450
451void NuPlayer::GenericSource::onSecureDecodersInstantiated(status_t err) {
452    if (err != OK) {
453        ALOGE("Failed to instantiate secure decoders!");
454        notifyPreparedAndCleanup(err);
455        return;
456    }
457    finishPrepareAsync();
458}
459
460void NuPlayer::GenericSource::finishPrepareAsync() {
461    status_t err = startSources();
462    if (err != OK) {
463        ALOGE("Failed to init start data source!");
464        notifyPreparedAndCleanup(err);
465        return;
466    }
467
468    if (mIsStreaming) {
469        mPrepareBuffering = true;
470
471        ensureCacheIsFetching();
472        restartPollBuffering();
473    } else {
474        notifyPrepared();
475    }
476}
477
478void NuPlayer::GenericSource::notifyPreparedAndCleanup(status_t err) {
479    if (err != OK) {
480        {
481            sp<DataSource> dataSource = mDataSource;
482            sp<NuCachedSource2> cachedSource = mCachedSource;
483            sp<DataSource> httpSource = mHttpSource;
484            {
485                Mutex::Autolock _l(mDisconnectLock);
486                mDataSource.clear();
487                mCachedSource.clear();
488                mHttpSource.clear();
489            }
490        }
491        mBitrate = -1;
492
493        cancelPollBuffering();
494    }
495    notifyPrepared(err);
496}
497
498void NuPlayer::GenericSource::start() {
499    ALOGI("start");
500
501    mStopRead = false;
502    if (mAudioTrack.mSource != NULL) {
503        postReadBuffer(MEDIA_TRACK_TYPE_AUDIO);
504    }
505
506    if (mVideoTrack.mSource != NULL) {
507        postReadBuffer(MEDIA_TRACK_TYPE_VIDEO);
508    }
509
510    setDrmPlaybackStatusIfNeeded(Playback::START, getLastReadPosition() / 1000);
511    mStarted = true;
512
513    (new AMessage(kWhatStart, this))->post();
514}
515
516void NuPlayer::GenericSource::stop() {
517    // nothing to do, just account for DRM playback status
518    setDrmPlaybackStatusIfNeeded(Playback::STOP, 0);
519    mStarted = false;
520    if (mIsWidevine || mIsSecure) {
521        // For widevine or secure sources we need to prevent any further reads.
522        sp<AMessage> msg = new AMessage(kWhatStopWidevine, this);
523        sp<AMessage> response;
524        (void) msg->postAndAwaitResponse(&response);
525    }
526}
527
528void NuPlayer::GenericSource::pause() {
529    // nothing to do, just account for DRM playback status
530    setDrmPlaybackStatusIfNeeded(Playback::PAUSE, 0);
531    mStarted = false;
532}
533
534void NuPlayer::GenericSource::resume() {
535    // nothing to do, just account for DRM playback status
536    setDrmPlaybackStatusIfNeeded(Playback::START, getLastReadPosition() / 1000);
537    mStarted = true;
538
539    (new AMessage(kWhatResume, this))->post();
540}
541
542void NuPlayer::GenericSource::disconnect() {
543    sp<DataSource> dataSource, httpSource;
544    {
545        Mutex::Autolock _l(mDisconnectLock);
546        dataSource = mDataSource;
547        httpSource = mHttpSource;
548    }
549
550    if (dataSource != NULL) {
551        // disconnect data source
552        if (dataSource->flags() & DataSource::kIsCachingDataSource) {
553            static_cast<NuCachedSource2 *>(dataSource.get())->disconnect();
554        }
555    } else if (httpSource != NULL) {
556        static_cast<HTTPBase *>(httpSource.get())->disconnect();
557    }
558}
559
560void NuPlayer::GenericSource::setDrmPlaybackStatusIfNeeded(int playbackStatus, int64_t position) {
561    if (mDecryptHandle != NULL) {
562        mDrmManagerClient->setPlaybackStatus(mDecryptHandle, playbackStatus, position);
563    }
564    mSubtitleTrack.mPackets = new AnotherPacketSource(NULL);
565    mTimedTextTrack.mPackets = new AnotherPacketSource(NULL);
566}
567
568status_t NuPlayer::GenericSource::feedMoreTSData() {
569    return OK;
570}
571
572void NuPlayer::GenericSource::schedulePollBuffering() {
573    sp<AMessage> msg = new AMessage(kWhatPollBuffering, this);
574    msg->setInt32("generation", mPollBufferingGeneration);
575    msg->post(1000000ll);
576}
577
578void NuPlayer::GenericSource::cancelPollBuffering() {
579    mBuffering = false;
580    ++mPollBufferingGeneration;
581    mPrevBufferPercentage = -1;
582}
583
584void NuPlayer::GenericSource::restartPollBuffering() {
585    if (mIsStreaming) {
586        cancelPollBuffering();
587        onPollBuffering();
588    }
589}
590
591void NuPlayer::GenericSource::notifyBufferingUpdate(int32_t percentage) {
592    // Buffering percent could go backward as it's estimated from remaining
593    // data and last access time. This could cause the buffering position
594    // drawn on media control to jitter slightly. Remember previously reported
595    // percentage and don't allow it to go backward.
596    if (percentage < mPrevBufferPercentage) {
597        percentage = mPrevBufferPercentage;
598    } else if (percentage > 100) {
599        percentage = 100;
600    }
601
602    mPrevBufferPercentage = percentage;
603
604    ALOGV("notifyBufferingUpdate: buffering %d%%", percentage);
605
606    sp<AMessage> msg = dupNotify();
607    msg->setInt32("what", kWhatBufferingUpdate);
608    msg->setInt32("percentage", percentage);
609    msg->post();
610}
611
612void NuPlayer::GenericSource::startBufferingIfNecessary() {
613    ALOGV("startBufferingIfNecessary: mPrepareBuffering=%d, mBuffering=%d",
614            mPrepareBuffering, mBuffering);
615
616    if (mPrepareBuffering) {
617        return;
618    }
619
620    if (!mBuffering) {
621        mBuffering = true;
622
623        ensureCacheIsFetching();
624        sendCacheStats();
625
626        sp<AMessage> notify = dupNotify();
627        notify->setInt32("what", kWhatPauseOnBufferingStart);
628        notify->post();
629    }
630}
631
632void NuPlayer::GenericSource::stopBufferingIfNecessary() {
633    ALOGV("stopBufferingIfNecessary: mPrepareBuffering=%d, mBuffering=%d",
634            mPrepareBuffering, mBuffering);
635
636    if (mPrepareBuffering) {
637        mPrepareBuffering = false;
638        notifyPrepared();
639        return;
640    }
641
642    if (mBuffering) {
643        mBuffering = false;
644
645        sendCacheStats();
646
647        sp<AMessage> notify = dupNotify();
648        notify->setInt32("what", kWhatResumeOnBufferingEnd);
649        notify->post();
650    }
651}
652
653void NuPlayer::GenericSource::sendCacheStats() {
654    int32_t kbps = 0;
655    status_t err = UNKNOWN_ERROR;
656
657    if (mWVMExtractor != NULL) {
658        err = mWVMExtractor->getEstimatedBandwidthKbps(&kbps);
659    } else if (mCachedSource != NULL) {
660        err = mCachedSource->getEstimatedBandwidthKbps(&kbps);
661    }
662
663    if (err == OK) {
664        sp<AMessage> notify = dupNotify();
665        notify->setInt32("what", kWhatCacheStats);
666        notify->setInt32("bandwidth", kbps);
667        notify->post();
668    }
669}
670
671void NuPlayer::GenericSource::ensureCacheIsFetching() {
672    if (mCachedSource != NULL) {
673        mCachedSource->resumeFetchingIfNecessary();
674    }
675}
676
677void NuPlayer::GenericSource::onPollBuffering() {
678    status_t finalStatus = UNKNOWN_ERROR;
679    int64_t cachedDurationUs = -1ll;
680    ssize_t cachedDataRemaining = -1;
681
682    ALOGW_IF(mWVMExtractor != NULL && mCachedSource != NULL,
683            "WVMExtractor and NuCachedSource both present");
684
685    if (mWVMExtractor != NULL) {
686        cachedDurationUs =
687                mWVMExtractor->getCachedDurationUs(&finalStatus);
688    } else if (mCachedSource != NULL) {
689        cachedDataRemaining =
690                mCachedSource->approxDataRemaining(&finalStatus);
691
692        if (finalStatus == OK) {
693            off64_t size;
694            int64_t bitrate = 0ll;
695            if (mDurationUs > 0 && mCachedSource->getSize(&size) == OK) {
696                bitrate = size * 8000000ll / mDurationUs;
697            } else if (mBitrate > 0) {
698                bitrate = mBitrate;
699            }
700            if (bitrate > 0) {
701                cachedDurationUs = cachedDataRemaining * 8000000ll / bitrate;
702            }
703        }
704    }
705
706    if (finalStatus != OK) {
707        ALOGV("onPollBuffering: EOS (finalStatus = %d)", finalStatus);
708
709        if (finalStatus == ERROR_END_OF_STREAM) {
710            notifyBufferingUpdate(100);
711        }
712
713        stopBufferingIfNecessary();
714        return;
715    } else if (cachedDurationUs >= 0ll) {
716        if (mDurationUs > 0ll) {
717            int64_t cachedPosUs = getLastReadPosition() + cachedDurationUs;
718            int percentage = 100.0 * cachedPosUs / mDurationUs;
719            if (percentage > 100) {
720                percentage = 100;
721            }
722
723            notifyBufferingUpdate(percentage);
724        }
725
726        ALOGV("onPollBuffering: cachedDurationUs %.1f sec",
727                cachedDurationUs / 1000000.0f);
728
729        if (cachedDurationUs < kLowWaterMarkUs) {
730            startBufferingIfNecessary();
731        } else if (cachedDurationUs > kHighWaterMarkUs) {
732            stopBufferingIfNecessary();
733        }
734    } else if (cachedDataRemaining >= 0) {
735        ALOGV("onPollBuffering: cachedDataRemaining %zd bytes",
736                cachedDataRemaining);
737
738        if (cachedDataRemaining < kLowWaterMarkBytes) {
739            startBufferingIfNecessary();
740        } else if (cachedDataRemaining > kHighWaterMarkBytes) {
741            stopBufferingIfNecessary();
742        }
743    }
744
745    schedulePollBuffering();
746}
747
748void NuPlayer::GenericSource::onMessageReceived(const sp<AMessage> &msg) {
749    switch (msg->what()) {
750      case kWhatPrepareAsync:
751      {
752          onPrepareAsync();
753          break;
754      }
755      case kWhatFetchSubtitleData:
756      {
757          fetchTextData(kWhatSendSubtitleData, MEDIA_TRACK_TYPE_SUBTITLE,
758                  mFetchSubtitleDataGeneration, mSubtitleTrack.mPackets, msg);
759          break;
760      }
761
762      case kWhatFetchTimedTextData:
763      {
764          fetchTextData(kWhatSendTimedTextData, MEDIA_TRACK_TYPE_TIMEDTEXT,
765                  mFetchTimedTextDataGeneration, mTimedTextTrack.mPackets, msg);
766          break;
767      }
768
769      case kWhatSendSubtitleData:
770      {
771          sendTextData(kWhatSubtitleData, MEDIA_TRACK_TYPE_SUBTITLE,
772                  mFetchSubtitleDataGeneration, mSubtitleTrack.mPackets, msg);
773          break;
774      }
775
776      case kWhatSendGlobalTimedTextData:
777      {
778          sendGlobalTextData(kWhatTimedTextData, mFetchTimedTextDataGeneration, msg);
779          break;
780      }
781      case kWhatSendTimedTextData:
782      {
783          sendTextData(kWhatTimedTextData, MEDIA_TRACK_TYPE_TIMEDTEXT,
784                  mFetchTimedTextDataGeneration, mTimedTextTrack.mPackets, msg);
785          break;
786      }
787
788      case kWhatChangeAVSource:
789      {
790          int32_t trackIndex;
791          CHECK(msg->findInt32("trackIndex", &trackIndex));
792          const sp<MediaSource> source = mSources.itemAt(trackIndex);
793
794          Track* track;
795          const char *mime;
796          media_track_type trackType, counterpartType;
797          sp<MetaData> meta = source->getFormat();
798          meta->findCString(kKeyMIMEType, &mime);
799          if (!strncasecmp(mime, "audio/", 6)) {
800              track = &mAudioTrack;
801              trackType = MEDIA_TRACK_TYPE_AUDIO;
802              counterpartType = MEDIA_TRACK_TYPE_VIDEO;;
803          } else {
804              CHECK(!strncasecmp(mime, "video/", 6));
805              track = &mVideoTrack;
806              trackType = MEDIA_TRACK_TYPE_VIDEO;
807              counterpartType = MEDIA_TRACK_TYPE_AUDIO;;
808          }
809
810
811          if (track->mSource != NULL) {
812              track->mSource->stop();
813          }
814          track->mSource = source;
815          track->mSource->start();
816          track->mIndex = trackIndex;
817
818          int64_t timeUs, actualTimeUs;
819          const bool formatChange = true;
820          if (trackType == MEDIA_TRACK_TYPE_AUDIO) {
821              timeUs = mAudioLastDequeueTimeUs;
822          } else {
823              timeUs = mVideoLastDequeueTimeUs;
824          }
825          readBuffer(trackType, timeUs, &actualTimeUs, formatChange);
826          readBuffer(counterpartType, -1, NULL, formatChange);
827          ALOGV("timeUs %lld actualTimeUs %lld", (long long)timeUs, (long long)actualTimeUs);
828
829          break;
830      }
831
832      case kWhatStart:
833      case kWhatResume:
834      {
835          restartPollBuffering();
836          break;
837      }
838
839      case kWhatPollBuffering:
840      {
841          int32_t generation;
842          CHECK(msg->findInt32("generation", &generation));
843          if (generation == mPollBufferingGeneration) {
844              onPollBuffering();
845          }
846          break;
847      }
848
849      case kWhatGetFormat:
850      {
851          onGetFormatMeta(msg);
852          break;
853      }
854
855      case kWhatGetSelectedTrack:
856      {
857          onGetSelectedTrack(msg);
858          break;
859      }
860
861      case kWhatSelectTrack:
862      {
863          onSelectTrack(msg);
864          break;
865      }
866
867      case kWhatSeek:
868      {
869          onSeek(msg);
870          break;
871      }
872
873      case kWhatReadBuffer:
874      {
875          onReadBuffer(msg);
876          break;
877      }
878
879      case kWhatSecureDecodersInstantiated:
880      {
881          int32_t err;
882          CHECK(msg->findInt32("err", &err));
883          onSecureDecodersInstantiated(err);
884          break;
885      }
886
887      case kWhatStopWidevine:
888      {
889          // mStopRead is only used for Widevine to prevent the video source
890          // from being read while the associated video decoder is shutting down.
891          mStopRead = true;
892          if (mVideoTrack.mSource != NULL) {
893              mVideoTrack.mPackets->clear();
894          }
895          sp<AMessage> response = new AMessage;
896          sp<AReplyToken> replyID;
897          CHECK(msg->senderAwaitsResponse(&replyID));
898          response->postReply(replyID);
899          break;
900      }
901      default:
902          Source::onMessageReceived(msg);
903          break;
904    }
905}
906
907void NuPlayer::GenericSource::fetchTextData(
908        uint32_t sendWhat,
909        media_track_type type,
910        int32_t curGen,
911        sp<AnotherPacketSource> packets,
912        sp<AMessage> msg) {
913    int32_t msgGeneration;
914    CHECK(msg->findInt32("generation", &msgGeneration));
915    if (msgGeneration != curGen) {
916        // stale
917        return;
918    }
919
920    int32_t avail;
921    if (packets->hasBufferAvailable(&avail)) {
922        return;
923    }
924
925    int64_t timeUs;
926    CHECK(msg->findInt64("timeUs", &timeUs));
927
928    int64_t subTimeUs;
929    readBuffer(type, timeUs, &subTimeUs);
930
931    int64_t delayUs = subTimeUs - timeUs;
932    if (msg->what() == kWhatFetchSubtitleData) {
933        const int64_t oneSecUs = 1000000ll;
934        delayUs -= oneSecUs;
935    }
936    sp<AMessage> msg2 = new AMessage(sendWhat, this);
937    msg2->setInt32("generation", msgGeneration);
938    msg2->post(delayUs < 0 ? 0 : delayUs);
939}
940
941void NuPlayer::GenericSource::sendTextData(
942        uint32_t what,
943        media_track_type type,
944        int32_t curGen,
945        sp<AnotherPacketSource> packets,
946        sp<AMessage> msg) {
947    int32_t msgGeneration;
948    CHECK(msg->findInt32("generation", &msgGeneration));
949    if (msgGeneration != curGen) {
950        // stale
951        return;
952    }
953
954    int64_t subTimeUs;
955    if (packets->nextBufferTime(&subTimeUs) != OK) {
956        return;
957    }
958
959    int64_t nextSubTimeUs;
960    readBuffer(type, -1, &nextSubTimeUs);
961
962    sp<ABuffer> buffer;
963    status_t dequeueStatus = packets->dequeueAccessUnit(&buffer);
964    if (dequeueStatus == OK) {
965        sp<AMessage> notify = dupNotify();
966        notify->setInt32("what", what);
967        notify->setBuffer("buffer", buffer);
968        notify->post();
969
970        const int64_t delayUs = nextSubTimeUs - subTimeUs;
971        msg->post(delayUs < 0 ? 0 : delayUs);
972    }
973}
974
975void NuPlayer::GenericSource::sendGlobalTextData(
976        uint32_t what,
977        int32_t curGen,
978        sp<AMessage> msg) {
979    int32_t msgGeneration;
980    CHECK(msg->findInt32("generation", &msgGeneration));
981    if (msgGeneration != curGen) {
982        // stale
983        return;
984    }
985
986    uint32_t textType;
987    const void *data;
988    size_t size = 0;
989    if (mTimedTextTrack.mSource->getFormat()->findData(
990                    kKeyTextFormatData, &textType, &data, &size)) {
991        mGlobalTimedText = new ABuffer(size);
992        if (mGlobalTimedText->data()) {
993            memcpy(mGlobalTimedText->data(), data, size);
994            sp<AMessage> globalMeta = mGlobalTimedText->meta();
995            globalMeta->setInt64("timeUs", 0);
996            globalMeta->setString("mime", MEDIA_MIMETYPE_TEXT_3GPP);
997            globalMeta->setInt32("global", 1);
998            sp<AMessage> notify = dupNotify();
999            notify->setInt32("what", what);
1000            notify->setBuffer("buffer", mGlobalTimedText);
1001            notify->post();
1002        }
1003    }
1004}
1005
1006sp<MetaData> NuPlayer::GenericSource::getFormatMeta(bool audio) {
1007    sp<AMessage> msg = new AMessage(kWhatGetFormat, this);
1008    msg->setInt32("audio", audio);
1009
1010    sp<AMessage> response;
1011    void *format;
1012    status_t err = msg->postAndAwaitResponse(&response);
1013    if (err == OK && response != NULL) {
1014        CHECK(response->findPointer("format", &format));
1015        return (MetaData *)format;
1016    } else {
1017        return NULL;
1018    }
1019}
1020
1021void NuPlayer::GenericSource::onGetFormatMeta(sp<AMessage> msg) const {
1022    int32_t audio;
1023    CHECK(msg->findInt32("audio", &audio));
1024
1025    sp<AMessage> response = new AMessage;
1026    sp<MetaData> format = doGetFormatMeta(audio);
1027    response->setPointer("format", format.get());
1028
1029    sp<AReplyToken> replyID;
1030    CHECK(msg->senderAwaitsResponse(&replyID));
1031    response->postReply(replyID);
1032}
1033
1034sp<MetaData> NuPlayer::GenericSource::doGetFormatMeta(bool audio) const {
1035    sp<MediaSource> source = audio ? mAudioTrack.mSource : mVideoTrack.mSource;
1036
1037    if (source == NULL) {
1038        return NULL;
1039    }
1040
1041    return source->getFormat();
1042}
1043
1044status_t NuPlayer::GenericSource::dequeueAccessUnit(
1045        bool audio, sp<ABuffer> *accessUnit) {
1046    Track *track = audio ? &mAudioTrack : &mVideoTrack;
1047
1048    if (track->mSource == NULL) {
1049        return -EWOULDBLOCK;
1050    }
1051
1052    if (mIsWidevine && !audio) {
1053        // try to read a buffer as we may not have been able to the last time
1054        postReadBuffer(MEDIA_TRACK_TYPE_VIDEO);
1055    }
1056
1057    status_t finalResult;
1058    if (!track->mPackets->hasBufferAvailable(&finalResult)) {
1059        if (finalResult == OK) {
1060            postReadBuffer(
1061                    audio ? MEDIA_TRACK_TYPE_AUDIO : MEDIA_TRACK_TYPE_VIDEO);
1062            return -EWOULDBLOCK;
1063        }
1064        return finalResult;
1065    }
1066
1067    status_t result = track->mPackets->dequeueAccessUnit(accessUnit);
1068
1069    // start pulling in more buffers if we only have one (or no) buffer left
1070    // so that decoder has less chance of being starved
1071    if (track->mPackets->getAvailableBufferCount(&finalResult) < 2) {
1072        postReadBuffer(audio? MEDIA_TRACK_TYPE_AUDIO : MEDIA_TRACK_TYPE_VIDEO);
1073    }
1074
1075    if (result != OK) {
1076        if (mSubtitleTrack.mSource != NULL) {
1077            mSubtitleTrack.mPackets->clear();
1078            mFetchSubtitleDataGeneration++;
1079        }
1080        if (mTimedTextTrack.mSource != NULL) {
1081            mTimedTextTrack.mPackets->clear();
1082            mFetchTimedTextDataGeneration++;
1083        }
1084        return result;
1085    }
1086
1087    int64_t timeUs;
1088    status_t eosResult; // ignored
1089    CHECK((*accessUnit)->meta()->findInt64("timeUs", &timeUs));
1090    if (audio) {
1091        mAudioLastDequeueTimeUs = timeUs;
1092    } else {
1093        mVideoLastDequeueTimeUs = timeUs;
1094    }
1095
1096    if (mSubtitleTrack.mSource != NULL
1097            && !mSubtitleTrack.mPackets->hasBufferAvailable(&eosResult)) {
1098        sp<AMessage> msg = new AMessage(kWhatFetchSubtitleData, this);
1099        msg->setInt64("timeUs", timeUs);
1100        msg->setInt32("generation", mFetchSubtitleDataGeneration);
1101        msg->post();
1102    }
1103
1104    if (mTimedTextTrack.mSource != NULL
1105            && !mTimedTextTrack.mPackets->hasBufferAvailable(&eosResult)) {
1106        sp<AMessage> msg = new AMessage(kWhatFetchTimedTextData, this);
1107        msg->setInt64("timeUs", timeUs);
1108        msg->setInt32("generation", mFetchTimedTextDataGeneration);
1109        msg->post();
1110    }
1111
1112    return result;
1113}
1114
1115status_t NuPlayer::GenericSource::getDuration(int64_t *durationUs) {
1116    *durationUs = mDurationUs;
1117    return OK;
1118}
1119
1120size_t NuPlayer::GenericSource::getTrackCount() const {
1121    return mSources.size();
1122}
1123
1124sp<AMessage> NuPlayer::GenericSource::getTrackInfo(size_t trackIndex) const {
1125    size_t trackCount = mSources.size();
1126    if (trackIndex >= trackCount) {
1127        return NULL;
1128    }
1129
1130    sp<AMessage> format = new AMessage();
1131    sp<MetaData> meta = mSources.itemAt(trackIndex)->getFormat();
1132    if (meta == NULL) {
1133        ALOGE("no metadata for track %zu", trackIndex);
1134        return NULL;
1135    }
1136
1137    const char *mime;
1138    CHECK(meta->findCString(kKeyMIMEType, &mime));
1139    format->setString("mime", mime);
1140
1141    int32_t trackType;
1142    if (!strncasecmp(mime, "video/", 6)) {
1143        trackType = MEDIA_TRACK_TYPE_VIDEO;
1144    } else if (!strncasecmp(mime, "audio/", 6)) {
1145        trackType = MEDIA_TRACK_TYPE_AUDIO;
1146    } else if (!strcasecmp(mime, MEDIA_MIMETYPE_TEXT_3GPP)) {
1147        trackType = MEDIA_TRACK_TYPE_TIMEDTEXT;
1148    } else {
1149        trackType = MEDIA_TRACK_TYPE_UNKNOWN;
1150    }
1151    format->setInt32("type", trackType);
1152
1153    const char *lang;
1154    if (!meta->findCString(kKeyMediaLanguage, &lang)) {
1155        lang = "und";
1156    }
1157    format->setString("language", lang);
1158
1159    if (trackType == MEDIA_TRACK_TYPE_SUBTITLE) {
1160        int32_t isAutoselect = 1, isDefault = 0, isForced = 0;
1161        meta->findInt32(kKeyTrackIsAutoselect, &isAutoselect);
1162        meta->findInt32(kKeyTrackIsDefault, &isDefault);
1163        meta->findInt32(kKeyTrackIsForced, &isForced);
1164
1165        format->setInt32("auto", !!isAutoselect);
1166        format->setInt32("default", !!isDefault);
1167        format->setInt32("forced", !!isForced);
1168    }
1169
1170    return format;
1171}
1172
1173ssize_t NuPlayer::GenericSource::getSelectedTrack(media_track_type type) const {
1174    sp<AMessage> msg = new AMessage(kWhatGetSelectedTrack, this);
1175    msg->setInt32("type", type);
1176
1177    sp<AMessage> response;
1178    int32_t index;
1179    status_t err = msg->postAndAwaitResponse(&response);
1180    if (err == OK && response != NULL) {
1181        CHECK(response->findInt32("index", &index));
1182        return index;
1183    } else {
1184        return -1;
1185    }
1186}
1187
1188void NuPlayer::GenericSource::onGetSelectedTrack(sp<AMessage> msg) const {
1189    int32_t tmpType;
1190    CHECK(msg->findInt32("type", &tmpType));
1191    media_track_type type = (media_track_type)tmpType;
1192
1193    sp<AMessage> response = new AMessage;
1194    ssize_t index = doGetSelectedTrack(type);
1195    response->setInt32("index", index);
1196
1197    sp<AReplyToken> replyID;
1198    CHECK(msg->senderAwaitsResponse(&replyID));
1199    response->postReply(replyID);
1200}
1201
1202ssize_t NuPlayer::GenericSource::doGetSelectedTrack(media_track_type type) const {
1203    const Track *track = NULL;
1204    switch (type) {
1205    case MEDIA_TRACK_TYPE_VIDEO:
1206        track = &mVideoTrack;
1207        break;
1208    case MEDIA_TRACK_TYPE_AUDIO:
1209        track = &mAudioTrack;
1210        break;
1211    case MEDIA_TRACK_TYPE_TIMEDTEXT:
1212        track = &mTimedTextTrack;
1213        break;
1214    case MEDIA_TRACK_TYPE_SUBTITLE:
1215        track = &mSubtitleTrack;
1216        break;
1217    default:
1218        break;
1219    }
1220
1221    if (track != NULL && track->mSource != NULL) {
1222        return track->mIndex;
1223    }
1224
1225    return -1;
1226}
1227
1228status_t NuPlayer::GenericSource::selectTrack(size_t trackIndex, bool select, int64_t timeUs) {
1229    ALOGV("%s track: %zu", select ? "select" : "deselect", trackIndex);
1230    sp<AMessage> msg = new AMessage(kWhatSelectTrack, this);
1231    msg->setInt32("trackIndex", trackIndex);
1232    msg->setInt32("select", select);
1233    msg->setInt64("timeUs", timeUs);
1234
1235    sp<AMessage> response;
1236    status_t err = msg->postAndAwaitResponse(&response);
1237    if (err == OK && response != NULL) {
1238        CHECK(response->findInt32("err", &err));
1239    }
1240
1241    return err;
1242}
1243
1244void NuPlayer::GenericSource::onSelectTrack(sp<AMessage> msg) {
1245    int32_t trackIndex, select;
1246    int64_t timeUs;
1247    CHECK(msg->findInt32("trackIndex", &trackIndex));
1248    CHECK(msg->findInt32("select", &select));
1249    CHECK(msg->findInt64("timeUs", &timeUs));
1250
1251    sp<AMessage> response = new AMessage;
1252    status_t err = doSelectTrack(trackIndex, select, timeUs);
1253    response->setInt32("err", err);
1254
1255    sp<AReplyToken> replyID;
1256    CHECK(msg->senderAwaitsResponse(&replyID));
1257    response->postReply(replyID);
1258}
1259
1260status_t NuPlayer::GenericSource::doSelectTrack(size_t trackIndex, bool select, int64_t timeUs) {
1261    if (trackIndex >= mSources.size()) {
1262        return BAD_INDEX;
1263    }
1264
1265    if (!select) {
1266        Track* track = NULL;
1267        if (mSubtitleTrack.mSource != NULL && trackIndex == mSubtitleTrack.mIndex) {
1268            track = &mSubtitleTrack;
1269            mFetchSubtitleDataGeneration++;
1270        } else if (mTimedTextTrack.mSource != NULL && trackIndex == mTimedTextTrack.mIndex) {
1271            track = &mTimedTextTrack;
1272            mFetchTimedTextDataGeneration++;
1273        }
1274        if (track == NULL) {
1275            return INVALID_OPERATION;
1276        }
1277        track->mSource->stop();
1278        track->mSource = NULL;
1279        track->mPackets->clear();
1280        return OK;
1281    }
1282
1283    const sp<MediaSource> source = mSources.itemAt(trackIndex);
1284    sp<MetaData> meta = source->getFormat();
1285    const char *mime;
1286    CHECK(meta->findCString(kKeyMIMEType, &mime));
1287    if (!strncasecmp(mime, "text/", 5)) {
1288        bool isSubtitle = strcasecmp(mime, MEDIA_MIMETYPE_TEXT_3GPP);
1289        Track *track = isSubtitle ? &mSubtitleTrack : &mTimedTextTrack;
1290        if (track->mSource != NULL && track->mIndex == trackIndex) {
1291            return OK;
1292        }
1293        track->mIndex = trackIndex;
1294        if (track->mSource != NULL) {
1295            track->mSource->stop();
1296        }
1297        track->mSource = mSources.itemAt(trackIndex);
1298        track->mSource->start();
1299        if (track->mPackets == NULL) {
1300            track->mPackets = new AnotherPacketSource(track->mSource->getFormat());
1301        } else {
1302            track->mPackets->clear();
1303            track->mPackets->setFormat(track->mSource->getFormat());
1304
1305        }
1306
1307        if (isSubtitle) {
1308            mFetchSubtitleDataGeneration++;
1309        } else {
1310            mFetchTimedTextDataGeneration++;
1311        }
1312
1313        status_t eosResult; // ignored
1314        if (mSubtitleTrack.mSource != NULL
1315                && !mSubtitleTrack.mPackets->hasBufferAvailable(&eosResult)) {
1316            sp<AMessage> msg = new AMessage(kWhatFetchSubtitleData, this);
1317            msg->setInt64("timeUs", timeUs);
1318            msg->setInt32("generation", mFetchSubtitleDataGeneration);
1319            msg->post();
1320        }
1321
1322        sp<AMessage> msg2 = new AMessage(kWhatSendGlobalTimedTextData, this);
1323        msg2->setInt32("generation", mFetchTimedTextDataGeneration);
1324        msg2->post();
1325
1326        if (mTimedTextTrack.mSource != NULL
1327                && !mTimedTextTrack.mPackets->hasBufferAvailable(&eosResult)) {
1328            sp<AMessage> msg = new AMessage(kWhatFetchTimedTextData, this);
1329            msg->setInt64("timeUs", timeUs);
1330            msg->setInt32("generation", mFetchTimedTextDataGeneration);
1331            msg->post();
1332        }
1333
1334        return OK;
1335    } else if (!strncasecmp(mime, "audio/", 6) || !strncasecmp(mime, "video/", 6)) {
1336        bool audio = !strncasecmp(mime, "audio/", 6);
1337        Track *track = audio ? &mAudioTrack : &mVideoTrack;
1338        if (track->mSource != NULL && track->mIndex == trackIndex) {
1339            return OK;
1340        }
1341
1342        sp<AMessage> msg = new AMessage(kWhatChangeAVSource, this);
1343        msg->setInt32("trackIndex", trackIndex);
1344        msg->post();
1345        return OK;
1346    }
1347
1348    return INVALID_OPERATION;
1349}
1350
1351status_t NuPlayer::GenericSource::seekTo(int64_t seekTimeUs) {
1352    sp<AMessage> msg = new AMessage(kWhatSeek, this);
1353    msg->setInt64("seekTimeUs", seekTimeUs);
1354
1355    sp<AMessage> response;
1356    status_t err = msg->postAndAwaitResponse(&response);
1357    if (err == OK && response != NULL) {
1358        CHECK(response->findInt32("err", &err));
1359    }
1360
1361    return err;
1362}
1363
1364void NuPlayer::GenericSource::onSeek(sp<AMessage> msg) {
1365    int64_t seekTimeUs;
1366    CHECK(msg->findInt64("seekTimeUs", &seekTimeUs));
1367
1368    sp<AMessage> response = new AMessage;
1369    status_t err = doSeek(seekTimeUs);
1370    response->setInt32("err", err);
1371
1372    sp<AReplyToken> replyID;
1373    CHECK(msg->senderAwaitsResponse(&replyID));
1374    response->postReply(replyID);
1375}
1376
1377status_t NuPlayer::GenericSource::doSeek(int64_t seekTimeUs) {
1378    // If the Widevine source is stopped, do not attempt to read any
1379    // more buffers.
1380    if (mStopRead) {
1381        return INVALID_OPERATION;
1382    }
1383    if (mVideoTrack.mSource != NULL) {
1384        int64_t actualTimeUs;
1385        readBuffer(MEDIA_TRACK_TYPE_VIDEO, seekTimeUs, &actualTimeUs);
1386
1387        seekTimeUs = actualTimeUs;
1388        mVideoLastDequeueTimeUs = seekTimeUs;
1389    }
1390
1391    if (mAudioTrack.mSource != NULL) {
1392        readBuffer(MEDIA_TRACK_TYPE_AUDIO, seekTimeUs);
1393        mAudioLastDequeueTimeUs = seekTimeUs;
1394    }
1395
1396    setDrmPlaybackStatusIfNeeded(Playback::START, seekTimeUs / 1000);
1397    if (!mStarted) {
1398        setDrmPlaybackStatusIfNeeded(Playback::PAUSE, 0);
1399    }
1400
1401    // If currently buffering, post kWhatBufferingEnd first, so that
1402    // NuPlayer resumes. Otherwise, if cache hits high watermark
1403    // before new polling happens, no one will resume the playback.
1404    stopBufferingIfNecessary();
1405    restartPollBuffering();
1406
1407    return OK;
1408}
1409
1410sp<ABuffer> NuPlayer::GenericSource::mediaBufferToABuffer(
1411        MediaBuffer* mb,
1412        media_track_type trackType,
1413        int64_t /* seekTimeUs */,
1414        int64_t *actualTimeUs) {
1415    bool audio = trackType == MEDIA_TRACK_TYPE_AUDIO;
1416    size_t outLength = mb->range_length();
1417
1418    if (audio && mAudioIsVorbis) {
1419        outLength += sizeof(int32_t);
1420    }
1421
1422    sp<ABuffer> ab;
1423    if (mIsSecure && !audio) {
1424        // data is already provided in the buffer
1425        ab = new ABuffer(NULL, mb->range_length());
1426        mb->add_ref();
1427        ab->setMediaBufferBase(mb);
1428    } else {
1429        ab = new ABuffer(outLength);
1430        memcpy(ab->data(),
1431               (const uint8_t *)mb->data() + mb->range_offset(),
1432               mb->range_length());
1433    }
1434
1435    if (audio && mAudioIsVorbis) {
1436        int32_t numPageSamples;
1437        if (!mb->meta_data()->findInt32(kKeyValidSamples, &numPageSamples)) {
1438            numPageSamples = -1;
1439        }
1440
1441        uint8_t* abEnd = ab->data() + mb->range_length();
1442        memcpy(abEnd, &numPageSamples, sizeof(numPageSamples));
1443    }
1444
1445    sp<AMessage> meta = ab->meta();
1446
1447    int64_t timeUs;
1448    CHECK(mb->meta_data()->findInt64(kKeyTime, &timeUs));
1449    meta->setInt64("timeUs", timeUs);
1450
1451#if 0
1452    // Temporarily disable pre-roll till we have a full solution to handle
1453    // both single seek and continous seek gracefully.
1454    if (seekTimeUs > timeUs) {
1455        sp<AMessage> extra = new AMessage;
1456        extra->setInt64("resume-at-mediaTimeUs", seekTimeUs);
1457        meta->setMessage("extra", extra);
1458    }
1459#endif
1460
1461    if (trackType == MEDIA_TRACK_TYPE_TIMEDTEXT) {
1462        const char *mime;
1463        CHECK(mTimedTextTrack.mSource != NULL
1464                && mTimedTextTrack.mSource->getFormat()->findCString(kKeyMIMEType, &mime));
1465        meta->setString("mime", mime);
1466    }
1467
1468    int64_t durationUs;
1469    if (mb->meta_data()->findInt64(kKeyDuration, &durationUs)) {
1470        meta->setInt64("durationUs", durationUs);
1471    }
1472
1473    if (trackType == MEDIA_TRACK_TYPE_SUBTITLE) {
1474        meta->setInt32("trackIndex", mSubtitleTrack.mIndex);
1475    }
1476
1477    uint32_t dataType; // unused
1478    const void *seiData;
1479    size_t seiLength;
1480    if (mb->meta_data()->findData(kKeySEI, &dataType, &seiData, &seiLength)) {
1481        sp<ABuffer> sei = ABuffer::CreateAsCopy(seiData, seiLength);;
1482        meta->setBuffer("sei", sei);
1483    }
1484
1485    if (actualTimeUs) {
1486        *actualTimeUs = timeUs;
1487    }
1488
1489    mb->release();
1490    mb = NULL;
1491
1492    return ab;
1493}
1494
1495void NuPlayer::GenericSource::postReadBuffer(media_track_type trackType) {
1496    Mutex::Autolock _l(mReadBufferLock);
1497
1498    if ((mPendingReadBufferTypes & (1 << trackType)) == 0) {
1499        mPendingReadBufferTypes |= (1 << trackType);
1500        sp<AMessage> msg = new AMessage(kWhatReadBuffer, this);
1501        msg->setInt32("trackType", trackType);
1502        msg->post();
1503    }
1504}
1505
1506void NuPlayer::GenericSource::onReadBuffer(sp<AMessage> msg) {
1507    int32_t tmpType;
1508    CHECK(msg->findInt32("trackType", &tmpType));
1509    media_track_type trackType = (media_track_type)tmpType;
1510    readBuffer(trackType);
1511    {
1512        // only protect the variable change, as readBuffer may
1513        // take considerable time.
1514        Mutex::Autolock _l(mReadBufferLock);
1515        mPendingReadBufferTypes &= ~(1 << trackType);
1516    }
1517}
1518
1519void NuPlayer::GenericSource::readBuffer(
1520        media_track_type trackType, int64_t seekTimeUs, int64_t *actualTimeUs, bool formatChange) {
1521    // Do not read data if Widevine source is stopped
1522    if (mStopRead) {
1523        return;
1524    }
1525    Track *track;
1526    size_t maxBuffers = 1;
1527    switch (trackType) {
1528        case MEDIA_TRACK_TYPE_VIDEO:
1529            track = &mVideoTrack;
1530            if (mIsWidevine) {
1531                maxBuffers = 2;
1532            } else {
1533                maxBuffers = 4;
1534            }
1535            break;
1536        case MEDIA_TRACK_TYPE_AUDIO:
1537            track = &mAudioTrack;
1538            if (mIsWidevine) {
1539                maxBuffers = 8;
1540            } else {
1541                maxBuffers = 64;
1542            }
1543            break;
1544        case MEDIA_TRACK_TYPE_SUBTITLE:
1545            track = &mSubtitleTrack;
1546            break;
1547        case MEDIA_TRACK_TYPE_TIMEDTEXT:
1548            track = &mTimedTextTrack;
1549            break;
1550        default:
1551            TRESPASS();
1552    }
1553
1554    if (track->mSource == NULL) {
1555        return;
1556    }
1557
1558    if (actualTimeUs) {
1559        *actualTimeUs = seekTimeUs;
1560    }
1561
1562    MediaSource::ReadOptions options;
1563
1564    bool seeking = false;
1565
1566    if (seekTimeUs >= 0) {
1567        options.setSeekTo(seekTimeUs, MediaSource::ReadOptions::SEEK_PREVIOUS_SYNC);
1568        seeking = true;
1569    }
1570
1571    if (mIsWidevine) {
1572        options.setNonBlocking();
1573    }
1574
1575    for (size_t numBuffers = 0; numBuffers < maxBuffers; ) {
1576        MediaBuffer *mbuf;
1577        status_t err = track->mSource->read(&mbuf, &options);
1578
1579        options.clearSeekTo();
1580
1581        if (err == OK) {
1582            int64_t timeUs;
1583            CHECK(mbuf->meta_data()->findInt64(kKeyTime, &timeUs));
1584            if (trackType == MEDIA_TRACK_TYPE_AUDIO) {
1585                mAudioTimeUs = timeUs;
1586            } else if (trackType == MEDIA_TRACK_TYPE_VIDEO) {
1587                mVideoTimeUs = timeUs;
1588            }
1589
1590            queueDiscontinuityIfNeeded(seeking, formatChange, trackType, track);
1591
1592            sp<ABuffer> buffer = mediaBufferToABuffer(
1593                    mbuf, trackType, seekTimeUs,
1594                    numBuffers == 0 ? actualTimeUs : NULL);
1595            track->mPackets->queueAccessUnit(buffer);
1596            formatChange = false;
1597            seeking = false;
1598            ++numBuffers;
1599        } else if (err == WOULD_BLOCK) {
1600            break;
1601        } else if (err == INFO_FORMAT_CHANGED) {
1602#if 0
1603            track->mPackets->queueDiscontinuity(
1604                    ATSParser::DISCONTINUITY_FORMATCHANGE,
1605                    NULL,
1606                    false /* discard */);
1607#endif
1608        } else {
1609            queueDiscontinuityIfNeeded(seeking, formatChange, trackType, track);
1610            track->mPackets->signalEOS(err);
1611            break;
1612        }
1613    }
1614}
1615
1616void NuPlayer::GenericSource::queueDiscontinuityIfNeeded(
1617        bool seeking, bool formatChange, media_track_type trackType, Track *track) {
1618    // formatChange && seeking: track whose source is changed during selection
1619    // formatChange && !seeking: track whose source is not changed during selection
1620    // !formatChange: normal seek
1621    if ((seeking || formatChange)
1622            && (trackType == MEDIA_TRACK_TYPE_AUDIO
1623            || trackType == MEDIA_TRACK_TYPE_VIDEO)) {
1624        ATSParser::DiscontinuityType type = (formatChange && seeking)
1625                ? ATSParser::DISCONTINUITY_FORMATCHANGE
1626                : ATSParser::DISCONTINUITY_NONE;
1627        track->mPackets->queueDiscontinuity(type, NULL /* extra */, true /* discard */);
1628    }
1629}
1630
1631}  // namespace android
1632