MediaCodecSource.cpp revision 2cbf6cea23539bfe99e36d1d221de62255452e86 
1/*
2 * Copyright 2014, 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 "MediaCodecSource"
19#define DEBUG_DRIFT_TIME 0
20
21#include <inttypes.h>
22
23#include <gui/IGraphicBufferConsumer.h>
24#include <gui/IGraphicBufferProducer.h>
25#include <gui/Surface.h>
26#include <media/ICrypto.h>
27#include <media/stagefright/foundation/ABuffer.h>
28#include <media/stagefright/foundation/ADebug.h>
29#include <media/stagefright/foundation/ALooper.h>
30#include <media/stagefright/foundation/AMessage.h>
31#include <media/stagefright/MediaBuffer.h>
32#include <media/stagefright/MediaCodec.h>
33#include <media/stagefright/MediaCodecList.h>
34#include <media/stagefright/MediaCodecSource.h>
35#include <media/stagefright/MediaErrors.h>
36#include <media/stagefright/MediaSource.h>
37#include <media/stagefright/MetaData.h>
38#include <media/stagefright/PersistentSurface.h>
39#include <media/stagefright/Utils.h>
40
41namespace android {
42
43const int32_t kDefaultSwVideoEncoderFormat = HAL_PIXEL_FORMAT_YCbCr_420_888;
44const int32_t kDefaultHwVideoEncoderFormat = HAL_PIXEL_FORMAT_IMPLEMENTATION_DEFINED;
45const int32_t kDefaultVideoEncoderDataSpace = HAL_DATASPACE_V0_BT709;
46
47const int kStopTimeoutUs = 300000; // allow 1 sec for shutting down encoder
48
49struct MediaCodecSource::Puller : public AHandler {
50    Puller(const sp<MediaSource> &source);
51
52    void interruptSource();
53    status_t start(const sp<MetaData> &meta, const sp<AMessage> &notify);
54    void stop();
55    void stopSource();
56    void pause();
57    void resume();
58
59    bool readBuffer(MediaBuffer **buffer);
60
61protected:
62    virtual void onMessageReceived(const sp<AMessage> &msg);
63    virtual ~Puller();
64
65private:
66    enum {
67        kWhatStart = 'msta',
68        kWhatStop,
69        kWhatPull,
70    };
71
72    sp<MediaSource> mSource;
73    sp<AMessage> mNotify;
74    sp<ALooper> mLooper;
75    bool mIsAudio;
76
77    struct Queue {
78        Queue()
79            : mReadPendingSince(0),
80              mPaused(false),
81              mPulling(false) { }
82        int64_t mReadPendingSince;
83        bool mPaused;
84        bool mPulling;
85        Vector<MediaBuffer *> mReadBuffers;
86
87        void flush();
88        // if queue is empty, return false and set *|buffer| to NULL . Otherwise, pop
89        // buffer from front of the queue, place it into *|buffer| and return true.
90        bool readBuffer(MediaBuffer **buffer);
91        // add a buffer to the back of the queue
92        void pushBuffer(MediaBuffer *mbuf);
93    };
94    Mutexed<Queue> mQueue;
95
96    status_t postSynchronouslyAndReturnError(const sp<AMessage> &msg);
97    void schedulePull();
98    void handleEOS();
99
100    DISALLOW_EVIL_CONSTRUCTORS(Puller);
101};
102
103MediaCodecSource::Puller::Puller(const sp<MediaSource> &source)
104    : mSource(source),
105      mLooper(new ALooper()),
106      mIsAudio(false)
107{
108    sp<MetaData> meta = source->getFormat();
109    const char *mime;
110    CHECK(meta->findCString(kKeyMIMEType, &mime));
111
112    mIsAudio = !strncasecmp(mime, "audio/", 6);
113
114    mLooper->setName("pull_looper");
115}
116
117MediaCodecSource::Puller::~Puller() {
118    mLooper->unregisterHandler(id());
119    mLooper->stop();
120}
121
122void MediaCodecSource::Puller::Queue::pushBuffer(MediaBuffer *mbuf) {
123    mReadBuffers.push_back(mbuf);
124}
125
126bool MediaCodecSource::Puller::Queue::readBuffer(MediaBuffer **mbuf) {
127    if (mReadBuffers.empty()) {
128        *mbuf = NULL;
129        return false;
130    }
131    *mbuf = *mReadBuffers.begin();
132    mReadBuffers.erase(mReadBuffers.begin());
133    return true;
134}
135
136void MediaCodecSource::Puller::Queue::flush() {
137    MediaBuffer *mbuf;
138    while (readBuffer(&mbuf)) {
139        // there are no null buffers in the queue
140        mbuf->release();
141    }
142}
143
144bool MediaCodecSource::Puller::readBuffer(MediaBuffer **mbuf) {
145    Mutexed<Queue>::Locked queue(mQueue);
146    return queue->readBuffer(mbuf);
147}
148
149status_t MediaCodecSource::Puller::postSynchronouslyAndReturnError(
150        const sp<AMessage> &msg) {
151    sp<AMessage> response;
152    status_t err = msg->postAndAwaitResponse(&response);
153
154    if (err != OK) {
155        return err;
156    }
157
158    if (!response->findInt32("err", &err)) {
159        err = OK;
160    }
161
162    return err;
163}
164
165status_t MediaCodecSource::Puller::start(const sp<MetaData> &meta, const sp<AMessage> &notify) {
166    ALOGV("puller (%s) start", mIsAudio ? "audio" : "video");
167    mLooper->start(
168            false /* runOnCallingThread */,
169            false /* canCallJava */,
170            PRIORITY_AUDIO);
171    mLooper->registerHandler(this);
172    mNotify = notify;
173
174    sp<AMessage> msg = new AMessage(kWhatStart, this);
175    msg->setObject("meta", meta);
176    return postSynchronouslyAndReturnError(msg);
177}
178
179void MediaCodecSource::Puller::stop() {
180    bool interrupt = false;
181    {
182        // mark stopping before actually reaching kWhatStop on the looper, so the pulling will
183        // stop.
184        Mutexed<Queue>::Locked queue(mQueue);
185        queue->mPulling = false;
186        interrupt = queue->mReadPendingSince && (queue->mReadPendingSince < ALooper::GetNowUs() - 1000000);
187        queue->flush(); // flush any unprocessed pulled buffers
188    }
189
190    if (interrupt) {
191        interruptSource();
192    }
193}
194
195void MediaCodecSource::Puller::interruptSource() {
196    // call source->stop if read has been pending for over a second
197    // We have to call this outside the looper as looper is pending on the read.
198    mSource->stop();
199}
200
201void MediaCodecSource::Puller::stopSource() {
202    sp<AMessage> msg = new AMessage(kWhatStop, this);
203    (void)postSynchronouslyAndReturnError(msg);
204}
205
206void MediaCodecSource::Puller::pause() {
207    Mutexed<Queue>::Locked queue(mQueue);
208    queue->mPaused = true;
209}
210
211void MediaCodecSource::Puller::resume() {
212    Mutexed<Queue>::Locked queue(mQueue);
213    queue->mPaused = false;
214}
215
216void MediaCodecSource::Puller::schedulePull() {
217    (new AMessage(kWhatPull, this))->post();
218}
219
220void MediaCodecSource::Puller::handleEOS() {
221    ALOGV("puller (%s) posting EOS", mIsAudio ? "audio" : "video");
222    sp<AMessage> msg = mNotify->dup();
223    msg->setInt32("eos", 1);
224    msg->post();
225}
226
227void MediaCodecSource::Puller::onMessageReceived(const sp<AMessage> &msg) {
228    switch (msg->what()) {
229        case kWhatStart:
230        {
231            sp<RefBase> obj;
232            CHECK(msg->findObject("meta", &obj));
233
234            {
235                Mutexed<Queue>::Locked queue(mQueue);
236                queue->mPulling = true;
237            }
238
239            status_t err = mSource->start(static_cast<MetaData *>(obj.get()));
240
241            if (err == OK) {
242                schedulePull();
243            }
244
245            sp<AMessage> response = new AMessage;
246            response->setInt32("err", err);
247
248            sp<AReplyToken> replyID;
249            CHECK(msg->senderAwaitsResponse(&replyID));
250            response->postReply(replyID);
251            break;
252        }
253
254        case kWhatStop:
255        {
256            mSource->stop();
257
258            sp<AMessage> response = new AMessage;
259            response->setInt32("err", OK);
260
261            sp<AReplyToken> replyID;
262            CHECK(msg->senderAwaitsResponse(&replyID));
263            response->postReply(replyID);
264            break;
265        }
266
267        case kWhatPull:
268        {
269            Mutexed<Queue>::Locked queue(mQueue);
270            queue->mReadPendingSince = ALooper::GetNowUs();
271            if (!queue->mPulling) {
272                handleEOS();
273                break;
274            }
275
276            queue.unlock();
277            MediaBuffer *mbuf = NULL;
278            status_t err = mSource->read(&mbuf);
279            queue.lock();
280
281            queue->mReadPendingSince = 0;
282            // if we need to discard buffer
283            if (!queue->mPulling || queue->mPaused || err != OK) {
284                if (mbuf != NULL) {
285                    mbuf->release();
286                    mbuf = NULL;
287                }
288                if (queue->mPulling && err == OK) {
289                    msg->post(); // if simply paused, keep pulling source
290                    break;
291                } else if (err == ERROR_END_OF_STREAM) {
292                    ALOGV("stream ended, mbuf %p", mbuf);
293                } else if (err != OK) {
294                    ALOGE("error %d reading stream.", err);
295                }
296            }
297
298            if (mbuf != NULL) {
299                queue->pushBuffer(mbuf);
300            }
301
302            queue.unlock();
303
304            if (mbuf != NULL) {
305                mNotify->post();
306                msg->post();
307            } else {
308                handleEOS();
309            }
310            break;
311        }
312
313        default:
314            TRESPASS();
315    }
316}
317
318MediaCodecSource::Output::Output()
319    : mEncoderReachedEOS(false),
320      mErrorCode(OK) {
321}
322
323// static
324sp<MediaCodecSource> MediaCodecSource::Create(
325        const sp<ALooper> &looper,
326        const sp<AMessage> &format,
327        const sp<MediaSource> &source,
328        const sp<IGraphicBufferConsumer> &consumer,
329        uint32_t flags) {
330    sp<MediaCodecSource> mediaSource =
331            new MediaCodecSource(looper, format, source, consumer, flags);
332
333    if (mediaSource->init() == OK) {
334        return mediaSource;
335    }
336    return NULL;
337}
338
339void MediaCodecSource::setInputBufferTimeOffset(int64_t timeOffsetUs) {
340    sp<AMessage> msg = new AMessage(kWhatSetInputBufferTimeOffset, mReflector);
341    msg->setInt64("time-offset-us", timeOffsetUs);
342    postSynchronouslyAndReturnError(msg);
343}
344
345status_t MediaCodecSource::start(MetaData* params) {
346    sp<AMessage> msg = new AMessage(kWhatStart, mReflector);
347    msg->setObject("meta", params);
348    return postSynchronouslyAndReturnError(msg);
349}
350
351status_t MediaCodecSource::stop() {
352    sp<AMessage> msg = new AMessage(kWhatStop, mReflector);
353    return postSynchronouslyAndReturnError(msg);
354}
355
356status_t MediaCodecSource::pause() {
357    (new AMessage(kWhatPause, mReflector))->post();
358    return OK;
359}
360
361sp<IGraphicBufferProducer> MediaCodecSource::getGraphicBufferProducer() {
362    CHECK(mFlags & FLAG_USE_SURFACE_INPUT);
363    return mGraphicBufferProducer;
364}
365
366status_t MediaCodecSource::read(
367        MediaBuffer** buffer, const ReadOptions* /* options */) {
368    Mutexed<Output>::Locked output(mOutput);
369
370    *buffer = NULL;
371    while (output->mBufferQueue.size() == 0 && !output->mEncoderReachedEOS) {
372        output.waitForCondition(output->mCond);
373    }
374    if (!output->mEncoderReachedEOS) {
375        *buffer = *output->mBufferQueue.begin();
376        output->mBufferQueue.erase(output->mBufferQueue.begin());
377        return OK;
378    }
379    return output->mErrorCode;
380}
381
382void MediaCodecSource::signalBufferReturned(MediaBuffer *buffer) {
383    buffer->setObserver(0);
384    buffer->release();
385}
386
387MediaCodecSource::MediaCodecSource(
388        const sp<ALooper> &looper,
389        const sp<AMessage> &outputFormat,
390        const sp<MediaSource> &source,
391        const sp<IGraphicBufferConsumer> &consumer,
392        uint32_t flags)
393    : mLooper(looper),
394      mOutputFormat(outputFormat),
395      mMeta(new MetaData),
396      mFlags(flags),
397      mIsVideo(false),
398      mStarted(false),
399      mStopping(false),
400      mDoMoreWorkPending(false),
401      mSetEncoderFormat(false),
402      mEncoderFormat(0),
403      mEncoderDataSpace(0),
404      mGraphicBufferConsumer(consumer),
405      mInputBufferTimeOffsetUs(0),
406      mFirstSampleTimeUs(-1ll),
407      mGeneration(0) {
408    CHECK(mLooper != NULL);
409
410    AString mime;
411    CHECK(mOutputFormat->findString("mime", &mime));
412
413    if (!strncasecmp("video/", mime.c_str(), 6)) {
414        mIsVideo = true;
415    }
416
417    if (!(mFlags & FLAG_USE_SURFACE_INPUT)) {
418        mPuller = new Puller(source);
419    }
420}
421
422MediaCodecSource::~MediaCodecSource() {
423    releaseEncoder();
424
425    mCodecLooper->stop();
426    mLooper->unregisterHandler(mReflector->id());
427}
428
429status_t MediaCodecSource::init() {
430    status_t err = initEncoder();
431
432    if (err != OK) {
433        releaseEncoder();
434    }
435
436    return err;
437}
438
439status_t MediaCodecSource::initEncoder() {
440    mReflector = new AHandlerReflector<MediaCodecSource>(this);
441    mLooper->registerHandler(mReflector);
442
443    mCodecLooper = new ALooper;
444    mCodecLooper->setName("codec_looper");
445    mCodecLooper->start();
446
447    if (mFlags & FLAG_USE_METADATA_INPUT) {
448        mOutputFormat->setInt32("store-metadata-in-buffers", 1);
449    }
450
451    if (mFlags & FLAG_USE_SURFACE_INPUT) {
452        mOutputFormat->setInt32("create-input-buffers-suspended", 1);
453    }
454
455    AString outputMIME;
456    CHECK(mOutputFormat->findString("mime", &outputMIME));
457
458    Vector<AString> matchingCodecs;
459    MediaCodecList::findMatchingCodecs(
460            outputMIME.c_str(), true /* encoder */,
461            ((mFlags & FLAG_PREFER_SOFTWARE_CODEC) ? MediaCodecList::kPreferSoftwareCodecs : 0),
462            &matchingCodecs);
463
464    status_t err = NO_INIT;
465    for (size_t ix = 0; ix < matchingCodecs.size(); ++ix) {
466        mEncoder = MediaCodec::CreateByComponentName(
467                mCodecLooper, matchingCodecs[ix]);
468
469        if (mEncoder == NULL) {
470            continue;
471        }
472
473        ALOGV("output format is '%s'", mOutputFormat->debugString(0).c_str());
474
475        mEncoderActivityNotify = new AMessage(kWhatEncoderActivity, mReflector);
476        mEncoder->setCallback(mEncoderActivityNotify);
477
478        err = mEncoder->configure(
479                    mOutputFormat,
480                    NULL /* nativeWindow */,
481                    NULL /* crypto */,
482                    MediaCodec::CONFIGURE_FLAG_ENCODE);
483
484        if (err == OK) {
485            break;
486        }
487        mEncoder->release();
488        mEncoder = NULL;
489    }
490
491    if (err != OK) {
492        return err;
493    }
494
495    mEncoder->getOutputFormat(&mOutputFormat);
496    convertMessageToMetaData(mOutputFormat, mMeta);
497
498    if (mFlags & FLAG_USE_SURFACE_INPUT) {
499        CHECK(mIsVideo);
500
501        if (mGraphicBufferConsumer != NULL) {
502            // When using persistent surface, we are only interested in the
503            // consumer, but have to use PersistentSurface as a wrapper to
504            // pass consumer over messages (similar to BufferProducerWrapper)
505            err = mEncoder->setInputSurface(
506                    new PersistentSurface(NULL, mGraphicBufferConsumer));
507        } else {
508            err = mEncoder->createInputSurface(&mGraphicBufferProducer);
509        }
510
511        if (err != OK) {
512            return err;
513        }
514    }
515
516    sp<AMessage> inputFormat;
517    int32_t usingSwReadOften;
518    mSetEncoderFormat = false;
519    if (mEncoder->getInputFormat(&inputFormat) == OK) {
520        mSetEncoderFormat = true;
521        if (inputFormat->findInt32("using-sw-read-often", &usingSwReadOften)
522                && usingSwReadOften) {
523            // this is a SW encoder; signal source to allocate SW readable buffers
524            mEncoderFormat = kDefaultSwVideoEncoderFormat;
525        } else {
526            mEncoderFormat = kDefaultHwVideoEncoderFormat;
527        }
528        if (!inputFormat->findInt32("android._dataspace", &mEncoderDataSpace)) {
529            mEncoderDataSpace = kDefaultVideoEncoderDataSpace;
530        }
531        ALOGV("setting dataspace %#x, format %#x", mEncoderDataSpace, mEncoderFormat);
532    }
533
534    err = mEncoder->start();
535
536    if (err != OK) {
537        return err;
538    }
539
540    {
541        Mutexed<Output>::Locked output(mOutput);
542        output->mEncoderReachedEOS = false;
543        output->mErrorCode = OK;
544    }
545
546    return OK;
547}
548
549void MediaCodecSource::releaseEncoder() {
550    if (mEncoder == NULL) {
551        return;
552    }
553
554    mEncoder->release();
555    mEncoder.clear();
556}
557
558status_t MediaCodecSource::postSynchronouslyAndReturnError(
559        const sp<AMessage> &msg) {
560    sp<AMessage> response;
561    status_t err = msg->postAndAwaitResponse(&response);
562
563    if (err != OK) {
564        return err;
565    }
566
567    if (!response->findInt32("err", &err)) {
568        err = OK;
569    }
570
571    return err;
572}
573
574void MediaCodecSource::signalEOS(status_t err) {
575    bool reachedEOS = false;
576    {
577        Mutexed<Output>::Locked output(mOutput);
578        reachedEOS = output->mEncoderReachedEOS;
579        if (!reachedEOS) {
580            ALOGV("encoder (%s) reached EOS", mIsVideo ? "video" : "audio");
581            // release all unread media buffers
582            for (List<MediaBuffer*>::iterator it = output->mBufferQueue.begin();
583                    it != output->mBufferQueue.end(); it++) {
584                (*it)->release();
585            }
586            output->mBufferQueue.clear();
587            output->mEncoderReachedEOS = true;
588            output->mErrorCode = err;
589            output->mCond.signal();
590
591            reachedEOS = true;
592            output.unlock();
593            releaseEncoder();
594        }
595    }
596
597    if (mStopping && reachedEOS) {
598        ALOGI("encoder (%s) stopped", mIsVideo ? "video" : "audio");
599        mPuller->stopSource();
600        ALOGV("source (%s) stopped", mIsVideo ? "video" : "audio");
601        // posting reply to everyone that's waiting
602        List<sp<AReplyToken>>::iterator it;
603        for (it = mStopReplyIDQueue.begin();
604                it != mStopReplyIDQueue.end(); it++) {
605            (new AMessage)->postReply(*it);
606        }
607        mStopReplyIDQueue.clear();
608        mStopping = false;
609        ++mGeneration;
610    }
611}
612
613void MediaCodecSource::suspend() {
614    CHECK(mFlags & FLAG_USE_SURFACE_INPUT);
615    if (mEncoder != NULL) {
616        sp<AMessage> params = new AMessage;
617        params->setInt32("drop-input-frames", true);
618        mEncoder->setParameters(params);
619    }
620}
621
622void MediaCodecSource::resume(int64_t skipFramesBeforeUs) {
623    CHECK(mFlags & FLAG_USE_SURFACE_INPUT);
624    if (mEncoder != NULL) {
625        sp<AMessage> params = new AMessage;
626        params->setInt32("drop-input-frames", false);
627        if (skipFramesBeforeUs > 0) {
628            params->setInt64("skip-frames-before", skipFramesBeforeUs);
629        }
630        mEncoder->setParameters(params);
631    }
632}
633
634status_t MediaCodecSource::feedEncoderInputBuffers() {
635    MediaBuffer* mbuf = NULL;
636    while (!mAvailEncoderInputIndices.empty() && mPuller->readBuffer(&mbuf)) {
637        size_t bufferIndex = *mAvailEncoderInputIndices.begin();
638        mAvailEncoderInputIndices.erase(mAvailEncoderInputIndices.begin());
639
640        int64_t timeUs = 0ll;
641        uint32_t flags = 0;
642        size_t size = 0;
643
644        if (mbuf != NULL) {
645            CHECK(mbuf->meta_data()->findInt64(kKeyTime, &timeUs));
646            timeUs += mInputBufferTimeOffsetUs;
647
648            // push decoding time for video, or drift time for audio
649            if (mIsVideo) {
650                mDecodingTimeQueue.push_back(timeUs);
651            } else {
652#if DEBUG_DRIFT_TIME
653                if (mFirstSampleTimeUs < 0ll) {
654                    mFirstSampleTimeUs = timeUs;
655                }
656
657                int64_t driftTimeUs = 0;
658                if (mbuf->meta_data()->findInt64(kKeyDriftTime, &driftTimeUs)
659                        && driftTimeUs) {
660                    driftTimeUs = timeUs - mFirstSampleTimeUs - driftTimeUs;
661                }
662                mDriftTimeQueue.push_back(driftTimeUs);
663#endif // DEBUG_DRIFT_TIME
664            }
665
666            sp<ABuffer> inbuf;
667            status_t err = mEncoder->getInputBuffer(bufferIndex, &inbuf);
668            if (err != OK || inbuf == NULL) {
669                mbuf->release();
670                signalEOS();
671                break;
672            }
673
674            size = mbuf->size();
675
676            memcpy(inbuf->data(), mbuf->data(), size);
677
678            if (mIsVideo) {
679                // video encoder will release MediaBuffer when done
680                // with underlying data.
681                inbuf->setMediaBufferBase(mbuf);
682            } else {
683                mbuf->release();
684            }
685        } else {
686            flags = MediaCodec::BUFFER_FLAG_EOS;
687        }
688
689        status_t err = mEncoder->queueInputBuffer(
690                bufferIndex, 0, size, timeUs, flags);
691
692        if (err != OK) {
693            return err;
694        }
695    }
696
697    return OK;
698}
699
700status_t MediaCodecSource::onStart(MetaData *params) {
701    if (mStopping) {
702        ALOGE("Failed to start while we're stopping");
703        return INVALID_OPERATION;
704    }
705
706    if (mStarted) {
707        ALOGI("MediaCodecSource (%s) resuming", mIsVideo ? "video" : "audio");
708        if (mFlags & FLAG_USE_SURFACE_INPUT) {
709            resume();
710        } else {
711            CHECK(mPuller != NULL);
712            mPuller->resume();
713        }
714        return OK;
715    }
716
717    ALOGI("MediaCodecSource (%s) starting", mIsVideo ? "video" : "audio");
718
719    status_t err = OK;
720
721    if (mFlags & FLAG_USE_SURFACE_INPUT) {
722        int64_t startTimeUs;
723        if (!params || !params->findInt64(kKeyTime, &startTimeUs)) {
724            startTimeUs = -1ll;
725        }
726        resume(startTimeUs);
727    } else {
728        CHECK(mPuller != NULL);
729        sp<MetaData> meta = params;
730        if (mSetEncoderFormat) {
731            if (meta == NULL) {
732                meta = new MetaData;
733            }
734            meta->setInt32(kKeyPixelFormat, mEncoderFormat);
735            meta->setInt32(kKeyColorSpace, mEncoderDataSpace);
736        }
737
738        sp<AMessage> notify = new AMessage(kWhatPullerNotify, mReflector);
739        err = mPuller->start(meta.get(), notify);
740        if (err != OK) {
741            return err;
742        }
743    }
744
745    ALOGI("MediaCodecSource (%s) started", mIsVideo ? "video" : "audio");
746
747    mStarted = true;
748    return OK;
749}
750
751void MediaCodecSource::onMessageReceived(const sp<AMessage> &msg) {
752    switch (msg->what()) {
753    case kWhatPullerNotify:
754    {
755        int32_t eos = 0;
756        if (msg->findInt32("eos", &eos) && eos) {
757            ALOGV("puller (%s) reached EOS", mIsVideo ? "video" : "audio");
758            signalEOS();
759            break;
760        }
761
762        if (mEncoder == NULL) {
763            ALOGV("got msg '%s' after encoder shutdown.", msg->debugString().c_str());
764            break;
765        }
766
767        feedEncoderInputBuffers();
768        break;
769    }
770    case kWhatEncoderActivity:
771    {
772        if (mEncoder == NULL) {
773            break;
774        }
775
776        int32_t cbID;
777        CHECK(msg->findInt32("callbackID", &cbID));
778        if (cbID == MediaCodec::CB_INPUT_AVAILABLE) {
779            int32_t index;
780            CHECK(msg->findInt32("index", &index));
781
782            mAvailEncoderInputIndices.push_back(index);
783            feedEncoderInputBuffers();
784        } else if (cbID == MediaCodec::CB_OUTPUT_AVAILABLE) {
785            int32_t index;
786            size_t offset;
787            size_t size;
788            int64_t timeUs;
789            int32_t flags;
790
791            CHECK(msg->findInt32("index", &index));
792            CHECK(msg->findSize("offset", &offset));
793            CHECK(msg->findSize("size", &size));
794            CHECK(msg->findInt64("timeUs", &timeUs));
795            CHECK(msg->findInt32("flags", &flags));
796
797            if (flags & MediaCodec::BUFFER_FLAG_EOS) {
798                mEncoder->releaseOutputBuffer(index);
799                signalEOS();
800                break;
801            }
802
803            sp<ABuffer> outbuf;
804            status_t err = mEncoder->getOutputBuffer(index, &outbuf);
805            if (err != OK || outbuf == NULL) {
806                signalEOS();
807                break;
808            }
809
810            MediaBuffer *mbuf = new MediaBuffer(outbuf->size());
811            memcpy(mbuf->data(), outbuf->data(), outbuf->size());
812
813            if (!(flags & MediaCodec::BUFFER_FLAG_CODECCONFIG)) {
814                if (mIsVideo) {
815                    int64_t decodingTimeUs;
816                    if (mFlags & FLAG_USE_SURFACE_INPUT) {
817                        // Time offset is not applied at
818                        // feedEncoderInputBuffer() in surface input case.
819                        timeUs += mInputBufferTimeOffsetUs;
820                        // GraphicBufferSource is supposed to discard samples
821                        // queued before start, and offset timeUs by start time
822                        CHECK_GE(timeUs, 0ll);
823                        // TODO:
824                        // Decoding time for surface source is unavailable,
825                        // use presentation time for now. May need to move
826                        // this logic into MediaCodec.
827                        decodingTimeUs = timeUs;
828                    } else {
829                        CHECK(!mDecodingTimeQueue.empty());
830                        decodingTimeUs = *(mDecodingTimeQueue.begin());
831                        mDecodingTimeQueue.erase(mDecodingTimeQueue.begin());
832                    }
833                    mbuf->meta_data()->setInt64(kKeyDecodingTime, decodingTimeUs);
834
835                    ALOGV("[video] time %" PRId64 " us (%.2f secs), dts/pts diff %" PRId64,
836                            timeUs, timeUs / 1E6, decodingTimeUs - timeUs);
837                } else {
838                    int64_t driftTimeUs = 0;
839#if DEBUG_DRIFT_TIME
840                    CHECK(!mDriftTimeQueue.empty());
841                    driftTimeUs = *(mDriftTimeQueue.begin());
842                    mDriftTimeQueue.erase(mDriftTimeQueue.begin());
843                    mbuf->meta_data()->setInt64(kKeyDriftTime, driftTimeUs);
844#endif // DEBUG_DRIFT_TIME
845                    ALOGV("[audio] time %" PRId64 " us (%.2f secs), drift %" PRId64,
846                            timeUs, timeUs / 1E6, driftTimeUs);
847                }
848                mbuf->meta_data()->setInt64(kKeyTime, timeUs);
849            } else {
850                mbuf->meta_data()->setInt32(kKeyIsCodecConfig, true);
851            }
852            if (flags & MediaCodec::BUFFER_FLAG_SYNCFRAME) {
853                mbuf->meta_data()->setInt32(kKeyIsSyncFrame, true);
854            }
855            mbuf->setObserver(this);
856            mbuf->add_ref();
857
858            {
859                Mutexed<Output>::Locked output(mOutput);
860                output->mBufferQueue.push_back(mbuf);
861                output->mCond.signal();
862            }
863
864            mEncoder->releaseOutputBuffer(index);
865       } else if (cbID == MediaCodec::CB_ERROR) {
866            status_t err;
867            CHECK(msg->findInt32("err", &err));
868            ALOGE("Encoder (%s) reported error : 0x%x",
869                    mIsVideo ? "video" : "audio", err);
870            signalEOS();
871       }
872       break;
873    }
874    case kWhatStart:
875    {
876        sp<AReplyToken> replyID;
877        CHECK(msg->senderAwaitsResponse(&replyID));
878
879        sp<RefBase> obj;
880        CHECK(msg->findObject("meta", &obj));
881        MetaData *params = static_cast<MetaData *>(obj.get());
882
883        sp<AMessage> response = new AMessage;
884        response->setInt32("err", onStart(params));
885        response->postReply(replyID);
886        break;
887    }
888    case kWhatStop:
889    {
890        ALOGI("encoder (%s) stopping", mIsVideo ? "video" : "audio");
891
892        sp<AReplyToken> replyID;
893        CHECK(msg->senderAwaitsResponse(&replyID));
894
895        if (mOutput.lock()->mEncoderReachedEOS) {
896            // if we already reached EOS, reply and return now
897            ALOGI("encoder (%s) already stopped",
898                    mIsVideo ? "video" : "audio");
899            (new AMessage)->postReply(replyID);
900            break;
901        }
902
903        mStopReplyIDQueue.push_back(replyID);
904        if (mStopping) {
905            // nothing to do if we're already stopping, reply will be posted
906            // to all when we're stopped.
907            break;
908        }
909
910        mStopping = true;
911
912        // if using surface, signal source EOS and wait for EOS to come back.
913        // otherwise, stop puller (which also clears the input buffer queue)
914        // and wait for the EOS message. We cannot call source->stop() because
915        // the encoder may still be processing input buffers.
916        if (mFlags & FLAG_USE_SURFACE_INPUT) {
917            mEncoder->signalEndOfInputStream();
918        } else {
919            mPuller->stop();
920        }
921
922        // complete stop even if encoder/puller stalled
923        sp<AMessage> timeoutMsg = new AMessage(kWhatStopStalled, mReflector);
924        timeoutMsg->setInt32("generation", mGeneration);
925        timeoutMsg->post(kStopTimeoutUs);
926        break;
927    }
928
929    case kWhatStopStalled:
930    {
931        int32_t generation;
932        CHECK(msg->findInt32("generation", &generation));
933        if (generation != mGeneration) {
934             break;
935        }
936
937        if (!(mFlags & FLAG_USE_SURFACE_INPUT)) {
938            ALOGV("source (%s) stopping", mIsVideo ? "video" : "audio");
939            mPuller->interruptSource();
940            ALOGV("source (%s) stopped", mIsVideo ? "video" : "audio");
941        }
942        signalEOS();
943    }
944
945    case kWhatPause:
946    {
947        if (mFlags & FLAG_USE_SURFACE_INPUT) {
948            suspend();
949        } else {
950            CHECK(mPuller != NULL);
951            mPuller->pause();
952        }
953        break;
954    }
955    case kWhatSetInputBufferTimeOffset:
956    {
957        sp<AReplyToken> replyID;
958        CHECK(msg->senderAwaitsResponse(&replyID));
959
960        CHECK(msg->findInt64("time-offset-us", &mInputBufferTimeOffsetUs));
961
962        sp<AMessage> response = new AMessage;
963        response->postReply(replyID);
964        break;
965    }
966    default:
967        TRESPASS();
968    }
969}
970
971} // namespace android
972