RTSPSource.cpp revision c9ff2009a0a010eeaba80d76493fbf33fcb561c8 
1/*
2 * Copyright (C) 2010 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 "RTSPSource"
19#include <utils/Log.h>
20
21#include "RTSPSource.h"
22
23#include "AnotherPacketSource.h"
24#include "MyHandler.h"
25#include "SDPLoader.h"
26
27#include <media/IMediaHTTPService.h>
28#include <media/stagefright/MediaDefs.h>
29#include <media/stagefright/MetaData.h>
30
31namespace android {
32
33const int64_t kNearEOSTimeoutUs = 2000000ll; // 2 secs
34
35// Buffer Underflow/Prepare/StartServer/Overflow Marks
36const int64_t NuPlayer::RTSPSource::kUnderflowMarkUs   =  1000000ll;
37const int64_t NuPlayer::RTSPSource::kPrepareMarkUs     =  3000000ll;
38const int64_t NuPlayer::RTSPSource::kStartServerMarkUs =  5000000ll;
39const int64_t NuPlayer::RTSPSource::kOverflowMarkUs    = 10000000ll;
40
41NuPlayer::RTSPSource::RTSPSource(
42        const sp<AMessage> &notify,
43        const sp<IMediaHTTPService> &httpService,
44        const char *url,
45        const KeyedVector<String8, String8> *headers,
46        bool uidValid,
47        uid_t uid,
48        bool isSDP)
49    : Source(notify),
50      mHTTPService(httpService),
51      mURL(url),
52      mUIDValid(uidValid),
53      mUID(uid),
54      mFlags(0),
55      mIsSDP(isSDP),
56      mState(DISCONNECTED),
57      mFinalResult(OK),
58      mDisconnectReplyID(0),
59      mBuffering(false),
60      mInPreparationPhase(true),
61      mSeekGeneration(0),
62      mEOSTimeoutAudio(0),
63      mEOSTimeoutVideo(0) {
64    if (headers) {
65        mExtraHeaders = *headers;
66
67        ssize_t index =
68            mExtraHeaders.indexOfKey(String8("x-hide-urls-from-log"));
69
70        if (index >= 0) {
71            mFlags |= kFlagIncognito;
72
73            mExtraHeaders.removeItemsAt(index);
74        }
75    }
76}
77
78NuPlayer::RTSPSource::~RTSPSource() {
79    if (mLooper != NULL) {
80        mLooper->unregisterHandler(id());
81        mLooper->stop();
82    }
83}
84
85void NuPlayer::RTSPSource::prepareAsync() {
86    if (mIsSDP && mHTTPService == NULL) {
87        notifyPrepared(BAD_VALUE);
88        return;
89    }
90
91    if (mLooper == NULL) {
92        mLooper = new ALooper;
93        mLooper->setName("rtsp");
94        mLooper->start();
95
96        mLooper->registerHandler(this);
97    }
98
99    CHECK(mHandler == NULL);
100    CHECK(mSDPLoader == NULL);
101
102    sp<AMessage> notify = new AMessage(kWhatNotify, this);
103
104    CHECK_EQ(mState, (int)DISCONNECTED);
105    mState = CONNECTING;
106
107    if (mIsSDP) {
108        mSDPLoader = new SDPLoader(notify,
109                (mFlags & kFlagIncognito) ? SDPLoader::kFlagIncognito : 0,
110                mHTTPService);
111
112        mSDPLoader->load(
113                mURL.c_str(), mExtraHeaders.isEmpty() ? NULL : &mExtraHeaders);
114    } else {
115        mHandler = new MyHandler(mURL.c_str(), notify, mUIDValid, mUID);
116        mLooper->registerHandler(mHandler);
117
118        mHandler->connect();
119    }
120
121    startBufferingIfNecessary();
122}
123
124void NuPlayer::RTSPSource::start() {
125}
126
127void NuPlayer::RTSPSource::stop() {
128    if (mLooper == NULL) {
129        return;
130    }
131    sp<AMessage> msg = new AMessage(kWhatDisconnect, this);
132
133    sp<AMessage> dummy;
134    msg->postAndAwaitResponse(&dummy);
135}
136
137status_t NuPlayer::RTSPSource::feedMoreTSData() {
138    Mutex::Autolock _l(mBufferingLock);
139    return mFinalResult;
140}
141
142sp<MetaData> NuPlayer::RTSPSource::getFormatMeta(bool audio) {
143    sp<AnotherPacketSource> source = getSource(audio);
144
145    if (source == NULL) {
146        return NULL;
147    }
148
149    return source->getFormat();
150}
151
152bool NuPlayer::RTSPSource::haveSufficientDataOnAllTracks() {
153    // We're going to buffer at least 2 secs worth data on all tracks before
154    // starting playback (both at startup and after a seek).
155
156    static const int64_t kMinDurationUs = 2000000ll;
157
158    int64_t mediaDurationUs = 0;
159    getDuration(&mediaDurationUs);
160    if ((mAudioTrack != NULL && mAudioTrack->isFinished(mediaDurationUs))
161            || (mVideoTrack != NULL && mVideoTrack->isFinished(mediaDurationUs))) {
162        return true;
163    }
164
165    status_t err;
166    int64_t durationUs;
167    if (mAudioTrack != NULL
168            && (durationUs = mAudioTrack->getBufferedDurationUs(&err))
169                    < kMinDurationUs
170            && err == OK) {
171        ALOGV("audio track doesn't have enough data yet. (%.2f secs buffered)",
172              durationUs / 1E6);
173        return false;
174    }
175
176    if (mVideoTrack != NULL
177            && (durationUs = mVideoTrack->getBufferedDurationUs(&err))
178                    < kMinDurationUs
179            && err == OK) {
180        ALOGV("video track doesn't have enough data yet. (%.2f secs buffered)",
181              durationUs / 1E6);
182        return false;
183    }
184
185    return true;
186}
187
188status_t NuPlayer::RTSPSource::dequeueAccessUnit(
189        bool audio, sp<ABuffer> *accessUnit) {
190    if (!stopBufferingIfNecessary()) {
191        return -EWOULDBLOCK;
192    }
193
194    sp<AnotherPacketSource> source = getSource(audio);
195
196    if (source == NULL) {
197        return -EWOULDBLOCK;
198    }
199
200    status_t finalResult;
201    if (!source->hasBufferAvailable(&finalResult)) {
202        if (finalResult == OK) {
203            int64_t mediaDurationUs = 0;
204            getDuration(&mediaDurationUs);
205            sp<AnotherPacketSource> otherSource = getSource(!audio);
206            status_t otherFinalResult;
207
208            // If other source already signaled EOS, this source should also signal EOS
209            if (otherSource != NULL &&
210                    !otherSource->hasBufferAvailable(&otherFinalResult) &&
211                    otherFinalResult == ERROR_END_OF_STREAM) {
212                source->signalEOS(ERROR_END_OF_STREAM);
213                return ERROR_END_OF_STREAM;
214            }
215
216            // If this source has detected near end, give it some time to retrieve more
217            // data before signaling EOS
218            if (source->isFinished(mediaDurationUs)) {
219                int64_t eosTimeout = audio ? mEOSTimeoutAudio : mEOSTimeoutVideo;
220                if (eosTimeout == 0) {
221                    setEOSTimeout(audio, ALooper::GetNowUs());
222                } else if ((ALooper::GetNowUs() - eosTimeout) > kNearEOSTimeoutUs) {
223                    setEOSTimeout(audio, 0);
224                    source->signalEOS(ERROR_END_OF_STREAM);
225                    return ERROR_END_OF_STREAM;
226                }
227                return -EWOULDBLOCK;
228            }
229
230            if (!(otherSource != NULL && otherSource->isFinished(mediaDurationUs))) {
231                // We should not enter buffering mode
232                // if any of the sources already have detected EOS.
233                startBufferingIfNecessary();
234            }
235
236            return -EWOULDBLOCK;
237        }
238        return finalResult;
239    }
240
241    setEOSTimeout(audio, 0);
242
243    return source->dequeueAccessUnit(accessUnit);
244}
245
246sp<AnotherPacketSource> NuPlayer::RTSPSource::getSource(bool audio) {
247    if (mTSParser != NULL) {
248        sp<MediaSource> source = mTSParser->getSource(
249                audio ? ATSParser::AUDIO : ATSParser::VIDEO);
250
251        return static_cast<AnotherPacketSource *>(source.get());
252    }
253
254    return audio ? mAudioTrack : mVideoTrack;
255}
256
257void NuPlayer::RTSPSource::setEOSTimeout(bool audio, int64_t timeout) {
258    if (audio) {
259        mEOSTimeoutAudio = timeout;
260    } else {
261        mEOSTimeoutVideo = timeout;
262    }
263}
264
265status_t NuPlayer::RTSPSource::getDuration(int64_t *durationUs) {
266    *durationUs = 0ll;
267
268    int64_t audioDurationUs;
269    if (mAudioTrack != NULL
270            && mAudioTrack->getFormat()->findInt64(
271                kKeyDuration, &audioDurationUs)
272            && audioDurationUs > *durationUs) {
273        *durationUs = audioDurationUs;
274    }
275
276    int64_t videoDurationUs;
277    if (mVideoTrack != NULL
278            && mVideoTrack->getFormat()->findInt64(
279                kKeyDuration, &videoDurationUs)
280            && videoDurationUs > *durationUs) {
281        *durationUs = videoDurationUs;
282    }
283
284    return OK;
285}
286
287status_t NuPlayer::RTSPSource::seekTo(int64_t seekTimeUs) {
288    sp<AMessage> msg = new AMessage(kWhatPerformSeek, this);
289    msg->setInt32("generation", ++mSeekGeneration);
290    msg->setInt64("timeUs", seekTimeUs);
291
292    sp<AMessage> response;
293    status_t err = msg->postAndAwaitResponse(&response);
294    if (err == OK && response != NULL) {
295        CHECK(response->findInt32("err", &err));
296    }
297
298    return err;
299}
300
301void NuPlayer::RTSPSource::performSeek(int64_t seekTimeUs) {
302    if (mState != CONNECTED) {
303        finishSeek(INVALID_OPERATION);
304        return;
305    }
306
307    mState = SEEKING;
308    mHandler->seek(seekTimeUs);
309}
310
311void NuPlayer::RTSPSource::schedulePollBuffering() {
312    sp<AMessage> msg = new AMessage(kWhatPollBuffering, this);
313    msg->post(1000000ll); // 1 second intervals
314}
315
316void NuPlayer::RTSPSource::checkBuffering(
317        bool *prepared, bool *underflow, bool *overflow, bool *startServer) {
318    size_t numTracks = mTracks.size();
319    size_t preparedCount, underflowCount, overflowCount, startCount;
320    preparedCount = underflowCount = overflowCount = startCount = 0;
321    for (size_t i = 0; i < numTracks; ++i) {
322        status_t finalResult;
323        TrackInfo *info = &mTracks.editItemAt(i);
324        sp<AnotherPacketSource> src = info->mSource;
325        int64_t bufferedDurationUs = src->getBufferedDurationUs(&finalResult);
326
327        // isFinished when duration is 0 checks for EOS result only
328        if (bufferedDurationUs > kPrepareMarkUs || src->isFinished(/* duration */ 0)) {
329            ++preparedCount;
330        }
331
332        if (src->isFinished(/* duration */ 0)) {
333            ++overflowCount;
334        } else {
335            if (bufferedDurationUs < kUnderflowMarkUs) {
336                ++underflowCount;
337            }
338            if (bufferedDurationUs > kOverflowMarkUs) {
339                ++overflowCount;
340            }
341            if (bufferedDurationUs < kStartServerMarkUs) {
342                ++startCount;
343            }
344        }
345    }
346
347    *prepared    = (preparedCount == numTracks);
348    *underflow   = (underflowCount > 0);
349    *overflow    = (overflowCount == numTracks);
350    *startServer = (startCount > 0);
351}
352
353void NuPlayer::RTSPSource::onPollBuffering() {
354    bool prepared, underflow, overflow, startServer;
355    checkBuffering(&prepared, &underflow, &overflow, &startServer);
356
357    if (prepared && mInPreparationPhase) {
358        mInPreparationPhase = false;
359        notifyPrepared();
360    }
361
362    if (!mInPreparationPhase && underflow) {
363        startBufferingIfNecessary();
364    }
365
366    if (overflow && mHandler != NULL) {
367        stopBufferingIfNecessary();
368        mHandler->pause();
369    }
370
371    if (startServer && mHandler != NULL) {
372        mHandler->resume();
373    }
374
375    schedulePollBuffering();
376}
377
378void NuPlayer::RTSPSource::onMessageReceived(const sp<AMessage> &msg) {
379    if (msg->what() == kWhatDisconnect) {
380        sp<AReplyToken> replyID;
381        CHECK(msg->senderAwaitsResponse(&replyID));
382
383        mDisconnectReplyID = replyID;
384        finishDisconnectIfPossible();
385        return;
386    } else if (msg->what() == kWhatPerformSeek) {
387        int32_t generation;
388        CHECK(msg->findInt32("generation", &generation));
389        CHECK(msg->senderAwaitsResponse(&mSeekReplyID));
390
391        if (generation != mSeekGeneration) {
392            // obsolete.
393            finishSeek(OK);
394            return;
395        }
396
397        int64_t seekTimeUs;
398        CHECK(msg->findInt64("timeUs", &seekTimeUs));
399
400        performSeek(seekTimeUs);
401        return;
402    } else if (msg->what() == kWhatPollBuffering) {
403        onPollBuffering();
404        return;
405    }
406
407    CHECK_EQ(msg->what(), (int)kWhatNotify);
408
409    int32_t what;
410    CHECK(msg->findInt32("what", &what));
411
412    switch (what) {
413        case MyHandler::kWhatConnected:
414        {
415            onConnected();
416
417            notifyVideoSizeChanged();
418
419            uint32_t flags = 0;
420
421            if (mHandler->isSeekable()) {
422                flags = FLAG_CAN_PAUSE
423                        | FLAG_CAN_SEEK
424                        | FLAG_CAN_SEEK_BACKWARD
425                        | FLAG_CAN_SEEK_FORWARD;
426            }
427
428            notifyFlagsChanged(flags);
429            schedulePollBuffering();
430            break;
431        }
432
433        case MyHandler::kWhatDisconnected:
434        {
435            onDisconnected(msg);
436            break;
437        }
438
439        case MyHandler::kWhatSeekDone:
440        {
441            mState = CONNECTED;
442            // Unblock seekTo here in case we attempted to seek in a live stream
443            finishSeek(OK);
444            break;
445        }
446
447        case MyHandler::kWhatSeekPaused:
448        {
449            sp<AnotherPacketSource> source = getSource(true /* audio */);
450            if (source != NULL) {
451                source->queueDiscontinuity(ATSParser::DISCONTINUITY_NONE,
452                        /* extra */ NULL,
453                        /* discard */ true);
454            }
455            source = getSource(false /* video */);
456            if (source != NULL) {
457                source->queueDiscontinuity(ATSParser::DISCONTINUITY_NONE,
458                        /* extra */ NULL,
459                        /* discard */ true);
460            };
461
462            status_t err = OK;
463            msg->findInt32("err", &err);
464
465            if (err == OK) {
466                int64_t timeUs;
467                CHECK(msg->findInt64("time", &timeUs));
468                mHandler->continueSeekAfterPause(timeUs);
469            } else {
470                finishSeek(err);
471            }
472            break;
473        }
474
475        case MyHandler::kWhatAccessUnit:
476        {
477            size_t trackIndex;
478            CHECK(msg->findSize("trackIndex", &trackIndex));
479
480            if (mTSParser == NULL) {
481                CHECK_LT(trackIndex, mTracks.size());
482            } else {
483                CHECK_EQ(trackIndex, 0u);
484            }
485
486            sp<ABuffer> accessUnit;
487            CHECK(msg->findBuffer("accessUnit", &accessUnit));
488
489            int32_t damaged;
490            if (accessUnit->meta()->findInt32("damaged", &damaged)
491                    && damaged) {
492                ALOGI("dropping damaged access unit.");
493                break;
494            }
495
496            if (mTSParser != NULL) {
497                size_t offset = 0;
498                status_t err = OK;
499                while (offset + 188 <= accessUnit->size()) {
500                    err = mTSParser->feedTSPacket(
501                            accessUnit->data() + offset, 188);
502                    if (err != OK) {
503                        break;
504                    }
505
506                    offset += 188;
507                }
508
509                if (offset < accessUnit->size()) {
510                    err = ERROR_MALFORMED;
511                }
512
513                if (err != OK) {
514                    sp<AnotherPacketSource> source = getSource(false /* audio */);
515                    if (source != NULL) {
516                        source->signalEOS(err);
517                    }
518
519                    source = getSource(true /* audio */);
520                    if (source != NULL) {
521                        source->signalEOS(err);
522                    }
523                }
524                break;
525            }
526
527            TrackInfo *info = &mTracks.editItemAt(trackIndex);
528
529            sp<AnotherPacketSource> source = info->mSource;
530            if (source != NULL) {
531                uint32_t rtpTime;
532                CHECK(accessUnit->meta()->findInt32("rtp-time", (int32_t *)&rtpTime));
533
534                if (!info->mNPTMappingValid) {
535                    // This is a live stream, we didn't receive any normal
536                    // playtime mapping. We won't map to npt time.
537                    source->queueAccessUnit(accessUnit);
538                    break;
539                }
540
541                int64_t nptUs =
542                    ((double)rtpTime - (double)info->mRTPTime)
543                        / info->mTimeScale
544                        * 1000000ll
545                        + info->mNormalPlaytimeUs;
546
547                accessUnit->meta()->setInt64("timeUs", nptUs);
548
549                source->queueAccessUnit(accessUnit);
550            }
551            break;
552        }
553
554        case MyHandler::kWhatEOS:
555        {
556            int32_t finalResult;
557            CHECK(msg->findInt32("finalResult", &finalResult));
558            CHECK_NE(finalResult, (status_t)OK);
559
560            if (mTSParser != NULL) {
561                sp<AnotherPacketSource> source = getSource(false /* audio */);
562                if (source != NULL) {
563                    source->signalEOS(finalResult);
564                }
565
566                source = getSource(true /* audio */);
567                if (source != NULL) {
568                    source->signalEOS(finalResult);
569                }
570
571                return;
572            }
573
574            size_t trackIndex;
575            CHECK(msg->findSize("trackIndex", &trackIndex));
576            CHECK_LT(trackIndex, mTracks.size());
577
578            TrackInfo *info = &mTracks.editItemAt(trackIndex);
579            sp<AnotherPacketSource> source = info->mSource;
580            if (source != NULL) {
581                source->signalEOS(finalResult);
582            }
583
584            break;
585        }
586
587        case MyHandler::kWhatSeekDiscontinuity:
588        {
589            size_t trackIndex;
590            CHECK(msg->findSize("trackIndex", &trackIndex));
591            CHECK_LT(trackIndex, mTracks.size());
592
593            TrackInfo *info = &mTracks.editItemAt(trackIndex);
594            sp<AnotherPacketSource> source = info->mSource;
595            if (source != NULL) {
596                source->queueDiscontinuity(
597                        ATSParser::DISCONTINUITY_TIME,
598                        NULL,
599                        true /* discard */);
600            }
601
602            break;
603        }
604
605        case MyHandler::kWhatNormalPlayTimeMapping:
606        {
607            size_t trackIndex;
608            CHECK(msg->findSize("trackIndex", &trackIndex));
609            CHECK_LT(trackIndex, mTracks.size());
610
611            uint32_t rtpTime;
612            CHECK(msg->findInt32("rtpTime", (int32_t *)&rtpTime));
613
614            int64_t nptUs;
615            CHECK(msg->findInt64("nptUs", &nptUs));
616
617            TrackInfo *info = &mTracks.editItemAt(trackIndex);
618            info->mRTPTime = rtpTime;
619            info->mNormalPlaytimeUs = nptUs;
620            info->mNPTMappingValid = true;
621            break;
622        }
623
624        case SDPLoader::kWhatSDPLoaded:
625        {
626            onSDPLoaded(msg);
627            break;
628        }
629
630        default:
631            TRESPASS();
632    }
633}
634
635void NuPlayer::RTSPSource::onConnected() {
636    CHECK(mAudioTrack == NULL);
637    CHECK(mVideoTrack == NULL);
638
639    size_t numTracks = mHandler->countTracks();
640    for (size_t i = 0; i < numTracks; ++i) {
641        int32_t timeScale;
642        sp<MetaData> format = mHandler->getTrackFormat(i, &timeScale);
643
644        const char *mime;
645        CHECK(format->findCString(kKeyMIMEType, &mime));
646
647        if (!strcasecmp(mime, MEDIA_MIMETYPE_CONTAINER_MPEG2TS)) {
648            // Very special case for MPEG2 Transport Streams.
649            CHECK_EQ(numTracks, 1u);
650
651            mTSParser = new ATSParser;
652            return;
653        }
654
655        bool isAudio = !strncasecmp(mime, "audio/", 6);
656        bool isVideo = !strncasecmp(mime, "video/", 6);
657
658        TrackInfo info;
659        info.mTimeScale = timeScale;
660        info.mRTPTime = 0;
661        info.mNormalPlaytimeUs = 0ll;
662        info.mNPTMappingValid = false;
663
664        if ((isAudio && mAudioTrack == NULL)
665                || (isVideo && mVideoTrack == NULL)) {
666            sp<AnotherPacketSource> source = new AnotherPacketSource(format);
667
668            if (isAudio) {
669                mAudioTrack = source;
670            } else {
671                mVideoTrack = source;
672            }
673
674            info.mSource = source;
675        }
676
677        mTracks.push(info);
678    }
679
680    mState = CONNECTED;
681}
682
683void NuPlayer::RTSPSource::onSDPLoaded(const sp<AMessage> &msg) {
684    status_t err;
685    CHECK(msg->findInt32("result", &err));
686
687    mSDPLoader.clear();
688
689    if (mDisconnectReplyID != 0) {
690        err = UNKNOWN_ERROR;
691    }
692
693    if (err == OK) {
694        sp<ASessionDescription> desc;
695        sp<RefBase> obj;
696        CHECK(msg->findObject("description", &obj));
697        desc = static_cast<ASessionDescription *>(obj.get());
698
699        AString rtspUri;
700        if (!desc->findAttribute(0, "a=control", &rtspUri)) {
701            ALOGE("Unable to find url in SDP");
702            err = UNKNOWN_ERROR;
703        } else {
704            sp<AMessage> notify = new AMessage(kWhatNotify, this);
705
706            mHandler = new MyHandler(rtspUri.c_str(), notify, mUIDValid, mUID);
707            mLooper->registerHandler(mHandler);
708
709            mHandler->loadSDP(desc);
710        }
711    }
712
713    if (err != OK) {
714        if (mState == CONNECTING) {
715            // We're still in the preparation phase, signal that it
716            // failed.
717            notifyPrepared(err);
718        }
719
720        mState = DISCONNECTED;
721        setError(err);
722
723        if (mDisconnectReplyID != 0) {
724            finishDisconnectIfPossible();
725        }
726    }
727}
728
729void NuPlayer::RTSPSource::onDisconnected(const sp<AMessage> &msg) {
730    if (mState == DISCONNECTED) {
731        return;
732    }
733
734    status_t err;
735    CHECK(msg->findInt32("result", &err));
736    CHECK_NE(err, (status_t)OK);
737
738    mLooper->unregisterHandler(mHandler->id());
739    mHandler.clear();
740
741    if (mState == CONNECTING) {
742        // We're still in the preparation phase, signal that it
743        // failed.
744        notifyPrepared(err);
745    }
746
747    mState = DISCONNECTED;
748    setError(err);
749
750    if (mDisconnectReplyID != 0) {
751        finishDisconnectIfPossible();
752    }
753}
754
755void NuPlayer::RTSPSource::finishDisconnectIfPossible() {
756    if (mState != DISCONNECTED) {
757        if (mHandler != NULL) {
758            mHandler->disconnect();
759        } else if (mSDPLoader != NULL) {
760            mSDPLoader->cancel();
761        }
762        return;
763    }
764
765    (new AMessage)->postReply(mDisconnectReplyID);
766    mDisconnectReplyID = 0;
767}
768
769void NuPlayer::RTSPSource::setError(status_t err) {
770    Mutex::Autolock _l(mBufferingLock);
771    mFinalResult = err;
772}
773
774void NuPlayer::RTSPSource::startBufferingIfNecessary() {
775    Mutex::Autolock _l(mBufferingLock);
776
777    if (!mBuffering) {
778        mBuffering = true;
779
780        sp<AMessage> notify = dupNotify();
781        notify->setInt32("what", kWhatPauseOnBufferingStart);
782        notify->post();
783    }
784}
785
786bool NuPlayer::RTSPSource::stopBufferingIfNecessary() {
787    Mutex::Autolock _l(mBufferingLock);
788
789    if (mBuffering) {
790        if (!haveSufficientDataOnAllTracks()) {
791            return false;
792        }
793
794        mBuffering = false;
795
796        sp<AMessage> notify = dupNotify();
797        notify->setInt32("what", kWhatResumeOnBufferingEnd);
798        notify->post();
799    }
800
801    return true;
802}
803
804void NuPlayer::RTSPSource::finishSeek(status_t err) {
805    if (mSeekReplyID == NULL) {
806        return;
807    }
808    sp<AMessage> seekReply = new AMessage;
809    seekReply->setInt32("err", err);
810    seekReply->postReply(mSeekReplyID);
811    mSeekReplyID = NULL;
812}
813
814}  // namespace android
815