NuPlayer.cpp revision 1cd139824b2e6832f239cd27d8962d3239053c02 
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 "NuPlayer"
19#include <utils/Log.h>
20
21#include "NuPlayer.h"
22
23#include "HTTPLiveSource.h"
24#include "NuPlayerDecoder.h"
25#include "NuPlayerDriver.h"
26#include "NuPlayerRenderer.h"
27#include "NuPlayerSource.h"
28#include "RTSPSource.h"
29#include "StreamingSource.h"
30#include "GenericSource.h"
31
32#include "ATSParser.h"
33
34#include <media/stagefright/foundation/hexdump.h>
35#include <media/stagefright/foundation/ABuffer.h>
36#include <media/stagefright/foundation/ADebug.h>
37#include <media/stagefright/foundation/AMessage.h>
38#include <media/stagefright/MediaDefs.h>
39#include <media/stagefright/MediaErrors.h>
40#include <media/stagefright/MetaData.h>
41#include <gui/IGraphicBufferProducer.h>
42
43#include "avc_utils.h"
44
45#include "ESDS.h"
46#include <media/stagefright/Utils.h>
47
48namespace android {
49
50struct NuPlayer::Action : public RefBase {
51    Action() {}
52
53    virtual void execute(NuPlayer *player) = 0;
54
55private:
56    DISALLOW_EVIL_CONSTRUCTORS(Action);
57};
58
59struct NuPlayer::SeekAction : public Action {
60    SeekAction(int64_t seekTimeUs)
61        : mSeekTimeUs(seekTimeUs) {
62    }
63
64    virtual void execute(NuPlayer *player) {
65        player->performSeek(mSeekTimeUs);
66    }
67
68private:
69    int64_t mSeekTimeUs;
70
71    DISALLOW_EVIL_CONSTRUCTORS(SeekAction);
72};
73
74struct NuPlayer::SetSurfaceAction : public Action {
75    SetSurfaceAction(const sp<NativeWindowWrapper> &wrapper)
76        : mWrapper(wrapper) {
77    }
78
79    virtual void execute(NuPlayer *player) {
80        player->performSetSurface(mWrapper);
81    }
82
83private:
84    sp<NativeWindowWrapper> mWrapper;
85
86    DISALLOW_EVIL_CONSTRUCTORS(SetSurfaceAction);
87};
88
89struct NuPlayer::ShutdownDecoderAction : public Action {
90    ShutdownDecoderAction(bool audio, bool video)
91        : mAudio(audio),
92          mVideo(video) {
93    }
94
95    virtual void execute(NuPlayer *player) {
96        player->performDecoderShutdown(mAudio, mVideo);
97    }
98
99private:
100    bool mAudio;
101    bool mVideo;
102
103    DISALLOW_EVIL_CONSTRUCTORS(ShutdownDecoderAction);
104};
105
106struct NuPlayer::PostMessageAction : public Action {
107    PostMessageAction(const sp<AMessage> &msg)
108        : mMessage(msg) {
109    }
110
111    virtual void execute(NuPlayer *) {
112        mMessage->post();
113    }
114
115private:
116    sp<AMessage> mMessage;
117
118    DISALLOW_EVIL_CONSTRUCTORS(PostMessageAction);
119};
120
121// Use this if there's no state necessary to save in order to execute
122// the action.
123struct NuPlayer::SimpleAction : public Action {
124    typedef void (NuPlayer::*ActionFunc)();
125
126    SimpleAction(ActionFunc func)
127        : mFunc(func) {
128    }
129
130    virtual void execute(NuPlayer *player) {
131        (player->*mFunc)();
132    }
133
134private:
135    ActionFunc mFunc;
136
137    DISALLOW_EVIL_CONSTRUCTORS(SimpleAction);
138};
139
140////////////////////////////////////////////////////////////////////////////////
141
142NuPlayer::NuPlayer()
143    : mUIDValid(false),
144      mSourceFlags(0),
145      mVideoIsAVC(false),
146      mAudioEOS(false),
147      mVideoEOS(false),
148      mScanSourcesPending(false),
149      mScanSourcesGeneration(0),
150      mPollDurationGeneration(0),
151      mTimeDiscontinuityPending(false),
152      mFlushingAudio(NONE),
153      mFlushingVideo(NONE),
154      mSkipRenderingAudioUntilMediaTimeUs(-1ll),
155      mSkipRenderingVideoUntilMediaTimeUs(-1ll),
156      mVideoLateByUs(0ll),
157      mNumFramesTotal(0ll),
158      mNumFramesDropped(0ll),
159      mVideoScalingMode(NATIVE_WINDOW_SCALING_MODE_SCALE_TO_WINDOW),
160      mStarted(false) {
161}
162
163NuPlayer::~NuPlayer() {
164}
165
166void NuPlayer::setUID(uid_t uid) {
167    mUIDValid = true;
168    mUID = uid;
169}
170
171void NuPlayer::setDriver(const wp<NuPlayerDriver> &driver) {
172    mDriver = driver;
173}
174
175void NuPlayer::setDataSourceAsync(const sp<IStreamSource> &source) {
176    sp<AMessage> msg = new AMessage(kWhatSetDataSource, id());
177
178    sp<AMessage> notify = new AMessage(kWhatSourceNotify, id());
179
180    msg->setObject("source", new StreamingSource(notify, source));
181    msg->post();
182}
183
184static bool IsHTTPLiveURL(const char *url) {
185    if (!strncasecmp("http://", url, 7)
186            || !strncasecmp("https://", url, 8)
187            || !strncasecmp("file://", url, 7)) {
188        size_t len = strlen(url);
189        if (len >= 5 && !strcasecmp(".m3u8", &url[len - 5])) {
190            return true;
191        }
192
193        if (strstr(url,"m3u8")) {
194            return true;
195        }
196    }
197
198    return false;
199}
200
201void NuPlayer::setDataSourceAsync(
202        const sp<IMediaHTTPService> &httpService,
203        const char *url,
204        const KeyedVector<String8, String8> *headers) {
205    sp<AMessage> msg = new AMessage(kWhatSetDataSource, id());
206    size_t len = strlen(url);
207
208    sp<AMessage> notify = new AMessage(kWhatSourceNotify, id());
209
210    sp<Source> source;
211    if (IsHTTPLiveURL(url)) {
212        source = new HTTPLiveSource(notify, httpService, url, headers);
213    } else if (!strncasecmp(url, "rtsp://", 7)) {
214        source = new RTSPSource(
215                notify, httpService, url, headers, mUIDValid, mUID);
216    } else if ((!strncasecmp(url, "http://", 7)
217                || !strncasecmp(url, "https://", 8))
218                    && ((len >= 4 && !strcasecmp(".sdp", &url[len - 4]))
219                    || strstr(url, ".sdp?"))) {
220        source = new RTSPSource(
221                notify, httpService, url, headers, mUIDValid, mUID, true);
222    } else {
223        source = new GenericSource(notify, httpService, url, headers);
224    }
225
226    msg->setObject("source", source);
227    msg->post();
228}
229
230void NuPlayer::setDataSourceAsync(int fd, int64_t offset, int64_t length) {
231    sp<AMessage> msg = new AMessage(kWhatSetDataSource, id());
232
233    sp<AMessage> notify = new AMessage(kWhatSourceNotify, id());
234
235    sp<Source> source = new GenericSource(notify, fd, offset, length);
236    msg->setObject("source", source);
237    msg->post();
238}
239
240void NuPlayer::prepareAsync() {
241    (new AMessage(kWhatPrepare, id()))->post();
242}
243
244void NuPlayer::setVideoSurfaceTextureAsync(
245        const sp<IGraphicBufferProducer> &bufferProducer) {
246    sp<AMessage> msg = new AMessage(kWhatSetVideoNativeWindow, id());
247
248    if (bufferProducer == NULL) {
249        msg->setObject("native-window", NULL);
250    } else {
251        msg->setObject(
252                "native-window",
253                new NativeWindowWrapper(
254                    new Surface(bufferProducer)));
255    }
256
257    msg->post();
258}
259
260void NuPlayer::setAudioSink(const sp<MediaPlayerBase::AudioSink> &sink) {
261    sp<AMessage> msg = new AMessage(kWhatSetAudioSink, id());
262    msg->setObject("sink", sink);
263    msg->post();
264}
265
266void NuPlayer::start() {
267    (new AMessage(kWhatStart, id()))->post();
268}
269
270void NuPlayer::pause() {
271    (new AMessage(kWhatPause, id()))->post();
272}
273
274void NuPlayer::resume() {
275    (new AMessage(kWhatResume, id()))->post();
276}
277
278void NuPlayer::resetAsync() {
279    (new AMessage(kWhatReset, id()))->post();
280}
281
282void NuPlayer::seekToAsync(int64_t seekTimeUs) {
283    sp<AMessage> msg = new AMessage(kWhatSeek, id());
284    msg->setInt64("seekTimeUs", seekTimeUs);
285    msg->post();
286}
287
288// static
289bool NuPlayer::IsFlushingState(FlushStatus state, bool *needShutdown) {
290    switch (state) {
291        case FLUSHING_DECODER:
292            if (needShutdown != NULL) {
293                *needShutdown = false;
294            }
295            return true;
296
297        case FLUSHING_DECODER_SHUTDOWN:
298            if (needShutdown != NULL) {
299                *needShutdown = true;
300            }
301            return true;
302
303        default:
304            return false;
305    }
306}
307
308void NuPlayer::onMessageReceived(const sp<AMessage> &msg) {
309    switch (msg->what()) {
310        case kWhatSetDataSource:
311        {
312            ALOGV("kWhatSetDataSource");
313
314            CHECK(mSource == NULL);
315
316            sp<RefBase> obj;
317            CHECK(msg->findObject("source", &obj));
318
319            mSource = static_cast<Source *>(obj.get());
320
321            looper()->registerHandler(mSource);
322
323            CHECK(mDriver != NULL);
324            sp<NuPlayerDriver> driver = mDriver.promote();
325            if (driver != NULL) {
326                driver->notifySetDataSourceCompleted(OK);
327            }
328            break;
329        }
330
331        case kWhatPrepare:
332        {
333            mSource->prepareAsync();
334            break;
335        }
336
337        case kWhatGetTrackInfo:
338        {
339            uint32_t replyID;
340            CHECK(msg->senderAwaitsResponse(&replyID));
341
342            status_t err = INVALID_OPERATION;
343            if (mSource != NULL) {
344                Parcel* reply;
345                CHECK(msg->findPointer("reply", (void**)&reply));
346                err = mSource->getTrackInfo(reply);
347            }
348
349            sp<AMessage> response = new AMessage;
350            response->setInt32("err", err);
351
352            response->postReply(replyID);
353            break;
354        }
355
356        case kWhatSelectTrack:
357        {
358            uint32_t replyID;
359            CHECK(msg->senderAwaitsResponse(&replyID));
360
361            status_t err = INVALID_OPERATION;
362            if (mSource != NULL) {
363                size_t trackIndex;
364                int32_t select;
365                CHECK(msg->findSize("trackIndex", &trackIndex));
366                CHECK(msg->findInt32("select", &select));
367                err = mSource->selectTrack(trackIndex, select);
368            }
369
370            sp<AMessage> response = new AMessage;
371            response->setInt32("err", err);
372
373            response->postReply(replyID);
374            break;
375        }
376
377        case kWhatPollDuration:
378        {
379            int32_t generation;
380            CHECK(msg->findInt32("generation", &generation));
381
382            if (generation != mPollDurationGeneration) {
383                // stale
384                break;
385            }
386
387            int64_t durationUs;
388            if (mDriver != NULL && mSource->getDuration(&durationUs) == OK) {
389                sp<NuPlayerDriver> driver = mDriver.promote();
390                if (driver != NULL) {
391                    driver->notifyDuration(durationUs);
392                }
393            }
394
395            msg->post(1000000ll);  // poll again in a second.
396            break;
397        }
398
399        case kWhatSetVideoNativeWindow:
400        {
401            ALOGV("kWhatSetVideoNativeWindow");
402
403            mDeferredActions.push_back(
404                    new ShutdownDecoderAction(
405                        false /* audio */, true /* video */));
406
407            sp<RefBase> obj;
408            CHECK(msg->findObject("native-window", &obj));
409
410            mDeferredActions.push_back(
411                    new SetSurfaceAction(
412                        static_cast<NativeWindowWrapper *>(obj.get())));
413
414            if (obj != NULL) {
415                // If there is a new surface texture, instantiate decoders
416                // again if possible.
417                mDeferredActions.push_back(
418                        new SimpleAction(&NuPlayer::performScanSources));
419            }
420
421            processDeferredActions();
422            break;
423        }
424
425        case kWhatSetAudioSink:
426        {
427            ALOGV("kWhatSetAudioSink");
428
429            sp<RefBase> obj;
430            CHECK(msg->findObject("sink", &obj));
431
432            mAudioSink = static_cast<MediaPlayerBase::AudioSink *>(obj.get());
433            break;
434        }
435
436        case kWhatStart:
437        {
438            ALOGV("kWhatStart");
439
440            mVideoIsAVC = false;
441            mAudioEOS = false;
442            mVideoEOS = false;
443            mSkipRenderingAudioUntilMediaTimeUs = -1;
444            mSkipRenderingVideoUntilMediaTimeUs = -1;
445            mVideoLateByUs = 0;
446            mNumFramesTotal = 0;
447            mNumFramesDropped = 0;
448            mStarted = true;
449
450            mSource->start();
451
452            uint32_t flags = 0;
453
454            if (mSource->isRealTime()) {
455                flags |= Renderer::FLAG_REAL_TIME;
456            }
457
458            mRenderer = new Renderer(
459                    mAudioSink,
460                    new AMessage(kWhatRendererNotify, id()),
461                    flags);
462
463            looper()->registerHandler(mRenderer);
464
465            postScanSources();
466            break;
467        }
468
469        case kWhatScanSources:
470        {
471            int32_t generation;
472            CHECK(msg->findInt32("generation", &generation));
473            if (generation != mScanSourcesGeneration) {
474                // Drop obsolete msg.
475                break;
476            }
477
478            mScanSourcesPending = false;
479
480            ALOGV("scanning sources haveAudio=%d, haveVideo=%d",
481                 mAudioDecoder != NULL, mVideoDecoder != NULL);
482
483            bool mHadAnySourcesBefore =
484                (mAudioDecoder != NULL) || (mVideoDecoder != NULL);
485
486            if (mNativeWindow != NULL) {
487                instantiateDecoder(false, &mVideoDecoder);
488            }
489
490            if (mAudioSink != NULL) {
491                instantiateDecoder(true, &mAudioDecoder);
492            }
493
494            if (!mHadAnySourcesBefore
495                    && (mAudioDecoder != NULL || mVideoDecoder != NULL)) {
496                // This is the first time we've found anything playable.
497
498                if (mSourceFlags & Source::FLAG_DYNAMIC_DURATION) {
499                    schedulePollDuration();
500                }
501            }
502
503            status_t err;
504            if ((err = mSource->feedMoreTSData()) != OK) {
505                if (mAudioDecoder == NULL && mVideoDecoder == NULL) {
506                    // We're not currently decoding anything (no audio or
507                    // video tracks found) and we just ran out of input data.
508
509                    if (err == ERROR_END_OF_STREAM) {
510                        notifyListener(MEDIA_PLAYBACK_COMPLETE, 0, 0);
511                    } else {
512                        notifyListener(MEDIA_ERROR, MEDIA_ERROR_UNKNOWN, err);
513                    }
514                }
515                break;
516            }
517
518            if ((mAudioDecoder == NULL && mAudioSink != NULL)
519                    || (mVideoDecoder == NULL && mNativeWindow != NULL)) {
520                msg->post(100000ll);
521                mScanSourcesPending = true;
522            }
523            break;
524        }
525
526        case kWhatVideoNotify:
527        case kWhatAudioNotify:
528        {
529            bool audio = msg->what() == kWhatAudioNotify;
530
531            int32_t what;
532            CHECK(msg->findInt32("what", &what));
533
534            if (what == Decoder::kWhatFillThisBuffer) {
535                status_t err = feedDecoderInputData(
536                        audio, msg);
537
538                if (err == -EWOULDBLOCK) {
539                    if (mSource->feedMoreTSData() == OK) {
540                        msg->post(10000ll);
541                    }
542                }
543            } else if (what == Decoder::kWhatEOS) {
544                int32_t err;
545                CHECK(msg->findInt32("err", &err));
546
547                if (err == ERROR_END_OF_STREAM) {
548                    ALOGV("got %s decoder EOS", audio ? "audio" : "video");
549                } else {
550                    ALOGV("got %s decoder EOS w/ error %d",
551                         audio ? "audio" : "video",
552                         err);
553                }
554
555                mRenderer->queueEOS(audio, err);
556            } else if (what == Decoder::kWhatFlushCompleted) {
557                bool needShutdown;
558
559                if (audio) {
560                    CHECK(IsFlushingState(mFlushingAudio, &needShutdown));
561                    mFlushingAudio = FLUSHED;
562                } else {
563                    CHECK(IsFlushingState(mFlushingVideo, &needShutdown));
564                    mFlushingVideo = FLUSHED;
565
566                    mVideoLateByUs = 0;
567                }
568
569                ALOGV("decoder %s flush completed", audio ? "audio" : "video");
570
571                if (needShutdown) {
572                    ALOGV("initiating %s decoder shutdown",
573                         audio ? "audio" : "video");
574
575                    (audio ? mAudioDecoder : mVideoDecoder)->initiateShutdown();
576
577                    if (audio) {
578                        mFlushingAudio = SHUTTING_DOWN_DECODER;
579                    } else {
580                        mFlushingVideo = SHUTTING_DOWN_DECODER;
581                    }
582                }
583
584                finishFlushIfPossible();
585            } else if (what == Decoder::kWhatOutputFormatChanged) {
586                sp<AMessage> format;
587                CHECK(msg->findMessage("format", &format));
588
589                if (audio) {
590                    int32_t numChannels;
591                    CHECK(format->findInt32(
592                                "channel-count", &numChannels));
593
594                    int32_t sampleRate;
595                    CHECK(format->findInt32("sample-rate", &sampleRate));
596
597                    ALOGV("Audio output format changed to %d Hz, %d channels",
598                         sampleRate, numChannels);
599
600                    mAudioSink->close();
601
602                    audio_output_flags_t flags;
603                    int64_t durationUs;
604                    // FIXME: we should handle the case where the video decoder
605                    // is created after we receive the format change indication.
606                    // Current code will just make that we select deep buffer
607                    // with video which should not be a problem as it should
608                    // not prevent from keeping A/V sync.
609                    if (mVideoDecoder == NULL &&
610                            mSource->getDuration(&durationUs) == OK &&
611                            durationUs
612                                > AUDIO_SINK_MIN_DEEP_BUFFER_DURATION_US) {
613                        flags = AUDIO_OUTPUT_FLAG_DEEP_BUFFER;
614                    } else {
615                        flags = AUDIO_OUTPUT_FLAG_NONE;
616                    }
617
618                    int32_t channelMask;
619                    if (!format->findInt32("channel-mask", &channelMask)) {
620                        channelMask = CHANNEL_MASK_USE_CHANNEL_ORDER;
621                    }
622
623                    CHECK_EQ(mAudioSink->open(
624                                sampleRate,
625                                numChannels,
626                                (audio_channel_mask_t)channelMask,
627                                AUDIO_FORMAT_PCM_16_BIT,
628                                8 /* bufferCount */,
629                                NULL,
630                                NULL,
631                                flags),
632                             (status_t)OK);
633                    mAudioSink->start();
634
635                    mRenderer->signalAudioSinkChanged();
636                } else {
637                    // video
638
639                    int32_t width, height;
640                    CHECK(format->findInt32("width", &width));
641                    CHECK(format->findInt32("height", &height));
642
643                    int32_t cropLeft, cropTop, cropRight, cropBottom;
644                    CHECK(format->findRect(
645                                "crop",
646                                &cropLeft, &cropTop, &cropRight, &cropBottom));
647
648                    int32_t displayWidth = cropRight - cropLeft + 1;
649                    int32_t displayHeight = cropBottom - cropTop + 1;
650
651                    ALOGV("Video output format changed to %d x %d "
652                         "(crop: %d x %d @ (%d, %d))",
653                         width, height,
654                         displayWidth,
655                         displayHeight,
656                         cropLeft, cropTop);
657
658                    sp<AMessage> videoInputFormat =
659                        mSource->getFormat(false /* audio */);
660
661                    // Take into account sample aspect ratio if necessary:
662                    int32_t sarWidth, sarHeight;
663                    if (videoInputFormat->findInt32("sar-width", &sarWidth)
664                            && videoInputFormat->findInt32(
665                                "sar-height", &sarHeight)) {
666                        ALOGV("Sample aspect ratio %d : %d",
667                              sarWidth, sarHeight);
668
669                        displayWidth = (displayWidth * sarWidth) / sarHeight;
670
671                        ALOGV("display dimensions %d x %d",
672                              displayWidth, displayHeight);
673                    }
674
675                    notifyListener(
676                            MEDIA_SET_VIDEO_SIZE, displayWidth, displayHeight);
677                }
678            } else if (what == Decoder::kWhatShutdownCompleted) {
679                ALOGV("%s shutdown completed", audio ? "audio" : "video");
680                if (audio) {
681                    mAudioDecoder.clear();
682
683                    CHECK_EQ((int)mFlushingAudio, (int)SHUTTING_DOWN_DECODER);
684                    mFlushingAudio = SHUT_DOWN;
685                } else {
686                    mVideoDecoder.clear();
687
688                    CHECK_EQ((int)mFlushingVideo, (int)SHUTTING_DOWN_DECODER);
689                    mFlushingVideo = SHUT_DOWN;
690                }
691
692                finishFlushIfPossible();
693            } else if (what == Decoder::kWhatError) {
694                ALOGE("Received error from %s decoder, aborting playback.",
695                     audio ? "audio" : "video");
696
697                mRenderer->queueEOS(audio, UNKNOWN_ERROR);
698            } else if (what == Decoder::kWhatDrainThisBuffer) {
699                renderBuffer(audio, msg);
700            } else {
701                ALOGV("Unhandled decoder notification %d '%c%c%c%c'.",
702                      what,
703                      what >> 24,
704                      (what >> 16) & 0xff,
705                      (what >> 8) & 0xff,
706                      what & 0xff);
707            }
708
709            break;
710        }
711
712        case kWhatRendererNotify:
713        {
714            int32_t what;
715            CHECK(msg->findInt32("what", &what));
716
717            if (what == Renderer::kWhatEOS) {
718                int32_t audio;
719                CHECK(msg->findInt32("audio", &audio));
720
721                int32_t finalResult;
722                CHECK(msg->findInt32("finalResult", &finalResult));
723
724                if (audio) {
725                    mAudioEOS = true;
726                } else {
727                    mVideoEOS = true;
728                }
729
730                if (finalResult == ERROR_END_OF_STREAM) {
731                    ALOGV("reached %s EOS", audio ? "audio" : "video");
732                } else {
733                    ALOGE("%s track encountered an error (%d)",
734                         audio ? "audio" : "video", finalResult);
735
736                    notifyListener(
737                            MEDIA_ERROR, MEDIA_ERROR_UNKNOWN, finalResult);
738                }
739
740                if ((mAudioEOS || mAudioDecoder == NULL)
741                        && (mVideoEOS || mVideoDecoder == NULL)) {
742                    notifyListener(MEDIA_PLAYBACK_COMPLETE, 0, 0);
743                }
744            } else if (what == Renderer::kWhatPosition) {
745                int64_t positionUs;
746                CHECK(msg->findInt64("positionUs", &positionUs));
747
748                CHECK(msg->findInt64("videoLateByUs", &mVideoLateByUs));
749
750                if (mDriver != NULL) {
751                    sp<NuPlayerDriver> driver = mDriver.promote();
752                    if (driver != NULL) {
753                        driver->notifyPosition(positionUs);
754
755                        driver->notifyFrameStats(
756                                mNumFramesTotal, mNumFramesDropped);
757                    }
758                }
759            } else if (what == Renderer::kWhatFlushComplete) {
760                int32_t audio;
761                CHECK(msg->findInt32("audio", &audio));
762
763                ALOGV("renderer %s flush completed.", audio ? "audio" : "video");
764            } else if (what == Renderer::kWhatVideoRenderingStart) {
765                notifyListener(MEDIA_INFO, MEDIA_INFO_RENDERING_START, 0);
766            } else if (what == Renderer::kWhatMediaRenderingStart) {
767                ALOGV("media rendering started");
768                notifyListener(MEDIA_STARTED, 0, 0);
769            }
770            break;
771        }
772
773        case kWhatMoreDataQueued:
774        {
775            break;
776        }
777
778        case kWhatReset:
779        {
780            ALOGV("kWhatReset");
781
782            mDeferredActions.push_back(
783                    new ShutdownDecoderAction(
784                        true /* audio */, true /* video */));
785
786            mDeferredActions.push_back(
787                    new SimpleAction(&NuPlayer::performReset));
788
789            processDeferredActions();
790            break;
791        }
792
793        case kWhatSeek:
794        {
795            int64_t seekTimeUs;
796            CHECK(msg->findInt64("seekTimeUs", &seekTimeUs));
797
798            ALOGV("kWhatSeek seekTimeUs=%lld us", seekTimeUs);
799
800            mDeferredActions.push_back(
801                    new SimpleAction(&NuPlayer::performDecoderFlush));
802
803            mDeferredActions.push_back(new SeekAction(seekTimeUs));
804
805            processDeferredActions();
806            break;
807        }
808
809        case kWhatPause:
810        {
811            CHECK(mRenderer != NULL);
812            mSource->pause();
813            mRenderer->pause();
814            break;
815        }
816
817        case kWhatResume:
818        {
819            CHECK(mRenderer != NULL);
820            mSource->resume();
821            mRenderer->resume();
822            break;
823        }
824
825        case kWhatSourceNotify:
826        {
827            onSourceNotify(msg);
828            break;
829        }
830
831        default:
832            TRESPASS();
833            break;
834    }
835}
836
837void NuPlayer::finishFlushIfPossible() {
838    if (mFlushingAudio != FLUSHED && mFlushingAudio != SHUT_DOWN) {
839        return;
840    }
841
842    if (mFlushingVideo != FLUSHED && mFlushingVideo != SHUT_DOWN) {
843        return;
844    }
845
846    ALOGV("both audio and video are flushed now.");
847
848    if (mTimeDiscontinuityPending) {
849        mRenderer->signalTimeDiscontinuity();
850        mTimeDiscontinuityPending = false;
851    }
852
853    if (mAudioDecoder != NULL) {
854        mAudioDecoder->signalResume();
855    }
856
857    if (mVideoDecoder != NULL) {
858        mVideoDecoder->signalResume();
859    }
860
861    mFlushingAudio = NONE;
862    mFlushingVideo = NONE;
863
864    processDeferredActions();
865}
866
867void NuPlayer::postScanSources() {
868    if (mScanSourcesPending) {
869        return;
870    }
871
872    sp<AMessage> msg = new AMessage(kWhatScanSources, id());
873    msg->setInt32("generation", mScanSourcesGeneration);
874    msg->post();
875
876    mScanSourcesPending = true;
877}
878
879status_t NuPlayer::instantiateDecoder(bool audio, sp<Decoder> *decoder) {
880    if (*decoder != NULL) {
881        return OK;
882    }
883
884    sp<AMessage> format = mSource->getFormat(audio);
885
886    if (format == NULL) {
887        return -EWOULDBLOCK;
888    }
889
890    if (!audio) {
891        AString mime;
892        CHECK(format->findString("mime", &mime));
893        mVideoIsAVC = !strcasecmp(MEDIA_MIMETYPE_VIDEO_AVC, mime.c_str());
894    }
895
896    sp<AMessage> notify =
897        new AMessage(audio ? kWhatAudioNotify : kWhatVideoNotify,
898                     id());
899
900    *decoder = audio ? new Decoder(notify) :
901                       new Decoder(notify, mNativeWindow);
902    (*decoder)->init();
903    (*decoder)->configure(format);
904
905    return OK;
906}
907
908status_t NuPlayer::feedDecoderInputData(bool audio, const sp<AMessage> &msg) {
909    sp<AMessage> reply;
910    CHECK(msg->findMessage("reply", &reply));
911
912    if ((audio && IsFlushingState(mFlushingAudio))
913            || (!audio && IsFlushingState(mFlushingVideo))) {
914        reply->setInt32("err", INFO_DISCONTINUITY);
915        reply->post();
916        return OK;
917    }
918
919    sp<ABuffer> accessUnit;
920
921    bool dropAccessUnit;
922    do {
923        status_t err = mSource->dequeueAccessUnit(audio, &accessUnit);
924
925        if (err == -EWOULDBLOCK) {
926            return err;
927        } else if (err != OK) {
928            if (err == INFO_DISCONTINUITY) {
929                int32_t type;
930                CHECK(accessUnit->meta()->findInt32("discontinuity", &type));
931
932                bool formatChange =
933                    (audio &&
934                     (type & ATSParser::DISCONTINUITY_AUDIO_FORMAT))
935                    || (!audio &&
936                            (type & ATSParser::DISCONTINUITY_VIDEO_FORMAT));
937
938                bool timeChange = (type & ATSParser::DISCONTINUITY_TIME) != 0;
939
940                ALOGI("%s discontinuity (formatChange=%d, time=%d)",
941                     audio ? "audio" : "video", formatChange, timeChange);
942
943                if (audio) {
944                    mSkipRenderingAudioUntilMediaTimeUs = -1;
945                } else {
946                    mSkipRenderingVideoUntilMediaTimeUs = -1;
947                }
948
949                if (timeChange) {
950                    sp<AMessage> extra;
951                    if (accessUnit->meta()->findMessage("extra", &extra)
952                            && extra != NULL) {
953                        int64_t resumeAtMediaTimeUs;
954                        if (extra->findInt64(
955                                    "resume-at-mediatimeUs", &resumeAtMediaTimeUs)) {
956                            ALOGI("suppressing rendering of %s until %lld us",
957                                    audio ? "audio" : "video", resumeAtMediaTimeUs);
958
959                            if (audio) {
960                                mSkipRenderingAudioUntilMediaTimeUs =
961                                    resumeAtMediaTimeUs;
962                            } else {
963                                mSkipRenderingVideoUntilMediaTimeUs =
964                                    resumeAtMediaTimeUs;
965                            }
966                        }
967                    }
968                }
969
970                mTimeDiscontinuityPending =
971                    mTimeDiscontinuityPending || timeChange;
972
973                if (formatChange || timeChange) {
974                    if (mFlushingAudio == NONE && mFlushingVideo == NONE) {
975                        // And we'll resume scanning sources once we're done
976                        // flushing.
977                        mDeferredActions.push_front(
978                                new SimpleAction(
979                                    &NuPlayer::performScanSources));
980                    }
981
982                    sp<AMessage> newFormat = mSource->getFormat(audio);
983                    sp<Decoder> &decoder = audio ? mAudioDecoder : mVideoDecoder;
984                    if (formatChange && !decoder->supportsSeamlessFormatChange(newFormat)) {
985                        flushDecoder(audio, /* needShutdown = */ true);
986                    } else {
987                        flushDecoder(audio, /* needShutdown = */ false);
988                        err = OK;
989                    }
990                } else {
991                    // This stream is unaffected by the discontinuity
992
993                    if (audio) {
994                        mFlushingAudio = FLUSHED;
995                    } else {
996                        mFlushingVideo = FLUSHED;
997                    }
998
999                    finishFlushIfPossible();
1000
1001                    return -EWOULDBLOCK;
1002                }
1003            }
1004
1005            reply->setInt32("err", err);
1006            reply->post();
1007            return OK;
1008        }
1009
1010        if (!audio) {
1011            ++mNumFramesTotal;
1012        }
1013
1014        dropAccessUnit = false;
1015        if (!audio
1016                && mVideoLateByUs > 100000ll
1017                && mVideoIsAVC
1018                && !IsAVCReferenceFrame(accessUnit)) {
1019            dropAccessUnit = true;
1020            ++mNumFramesDropped;
1021        }
1022    } while (dropAccessUnit);
1023
1024    // ALOGV("returned a valid buffer of %s data", audio ? "audio" : "video");
1025
1026#if 0
1027    int64_t mediaTimeUs;
1028    CHECK(accessUnit->meta()->findInt64("timeUs", &mediaTimeUs));
1029    ALOGV("feeding %s input buffer at media time %.2f secs",
1030         audio ? "audio" : "video",
1031         mediaTimeUs / 1E6);
1032#endif
1033
1034    reply->setBuffer("buffer", accessUnit);
1035    reply->post();
1036
1037    return OK;
1038}
1039
1040void NuPlayer::renderBuffer(bool audio, const sp<AMessage> &msg) {
1041    // ALOGV("renderBuffer %s", audio ? "audio" : "video");
1042
1043    sp<AMessage> reply;
1044    CHECK(msg->findMessage("reply", &reply));
1045
1046    if (IsFlushingState(audio ? mFlushingAudio : mFlushingVideo)) {
1047        // We're currently attempting to flush the decoder, in order
1048        // to complete this, the decoder wants all its buffers back,
1049        // so we don't want any output buffers it sent us (from before
1050        // we initiated the flush) to be stuck in the renderer's queue.
1051
1052        ALOGV("we're still flushing the %s decoder, sending its output buffer"
1053             " right back.", audio ? "audio" : "video");
1054
1055        reply->post();
1056        return;
1057    }
1058
1059    sp<ABuffer> buffer;
1060    CHECK(msg->findBuffer("buffer", &buffer));
1061
1062    int64_t &skipUntilMediaTimeUs =
1063        audio
1064            ? mSkipRenderingAudioUntilMediaTimeUs
1065            : mSkipRenderingVideoUntilMediaTimeUs;
1066
1067    if (skipUntilMediaTimeUs >= 0) {
1068        int64_t mediaTimeUs;
1069        CHECK(buffer->meta()->findInt64("timeUs", &mediaTimeUs));
1070
1071        if (mediaTimeUs < skipUntilMediaTimeUs) {
1072            ALOGV("dropping %s buffer at time %lld as requested.",
1073                 audio ? "audio" : "video",
1074                 mediaTimeUs);
1075
1076            reply->post();
1077            return;
1078        }
1079
1080        skipUntilMediaTimeUs = -1;
1081    }
1082
1083    mRenderer->queueBuffer(audio, buffer, reply);
1084}
1085
1086void NuPlayer::notifyListener(int msg, int ext1, int ext2, const Parcel *in) {
1087    if (mDriver == NULL) {
1088        return;
1089    }
1090
1091    sp<NuPlayerDriver> driver = mDriver.promote();
1092
1093    if (driver == NULL) {
1094        return;
1095    }
1096
1097    driver->notifyListener(msg, ext1, ext2, in);
1098}
1099
1100void NuPlayer::flushDecoder(bool audio, bool needShutdown) {
1101    ALOGV("[%s] flushDecoder needShutdown=%d",
1102          audio ? "audio" : "video", needShutdown);
1103
1104    if ((audio && mAudioDecoder == NULL) || (!audio && mVideoDecoder == NULL)) {
1105        ALOGI("flushDecoder %s without decoder present",
1106             audio ? "audio" : "video");
1107    }
1108
1109    // Make sure we don't continue to scan sources until we finish flushing.
1110    ++mScanSourcesGeneration;
1111    mScanSourcesPending = false;
1112
1113    (audio ? mAudioDecoder : mVideoDecoder)->signalFlush();
1114    mRenderer->flush(audio);
1115
1116    FlushStatus newStatus =
1117        needShutdown ? FLUSHING_DECODER_SHUTDOWN : FLUSHING_DECODER;
1118
1119    if (audio) {
1120        CHECK(mFlushingAudio == NONE
1121                || mFlushingAudio == AWAITING_DISCONTINUITY);
1122
1123        mFlushingAudio = newStatus;
1124
1125        if (mFlushingVideo == NONE) {
1126            mFlushingVideo = (mVideoDecoder != NULL)
1127                ? AWAITING_DISCONTINUITY
1128                : FLUSHED;
1129        }
1130    } else {
1131        CHECK(mFlushingVideo == NONE
1132                || mFlushingVideo == AWAITING_DISCONTINUITY);
1133
1134        mFlushingVideo = newStatus;
1135
1136        if (mFlushingAudio == NONE) {
1137            mFlushingAudio = (mAudioDecoder != NULL)
1138                ? AWAITING_DISCONTINUITY
1139                : FLUSHED;
1140        }
1141    }
1142}
1143
1144sp<AMessage> NuPlayer::Source::getFormat(bool audio) {
1145    sp<MetaData> meta = getFormatMeta(audio);
1146
1147    if (meta == NULL) {
1148        return NULL;
1149    }
1150
1151    sp<AMessage> msg = new AMessage;
1152
1153    if(convertMetaDataToMessage(meta, &msg) == OK) {
1154        return msg;
1155    }
1156    return NULL;
1157}
1158
1159status_t NuPlayer::setVideoScalingMode(int32_t mode) {
1160    mVideoScalingMode = mode;
1161    if (mNativeWindow != NULL) {
1162        status_t ret = native_window_set_scaling_mode(
1163                mNativeWindow->getNativeWindow().get(), mVideoScalingMode);
1164        if (ret != OK) {
1165            ALOGE("Failed to set scaling mode (%d): %s",
1166                -ret, strerror(-ret));
1167            return ret;
1168        }
1169    }
1170    return OK;
1171}
1172
1173status_t NuPlayer::getTrackInfo(Parcel* reply) const {
1174    sp<AMessage> msg = new AMessage(kWhatGetTrackInfo, id());
1175    msg->setPointer("reply", reply);
1176
1177    sp<AMessage> response;
1178    status_t err = msg->postAndAwaitResponse(&response);
1179    return err;
1180}
1181
1182status_t NuPlayer::selectTrack(size_t trackIndex, bool select) {
1183    sp<AMessage> msg = new AMessage(kWhatSelectTrack, id());
1184    msg->setSize("trackIndex", trackIndex);
1185    msg->setInt32("select", select);
1186
1187    sp<AMessage> response;
1188    status_t err = msg->postAndAwaitResponse(&response);
1189
1190    return err;
1191}
1192
1193void NuPlayer::schedulePollDuration() {
1194    sp<AMessage> msg = new AMessage(kWhatPollDuration, id());
1195    msg->setInt32("generation", mPollDurationGeneration);
1196    msg->post();
1197}
1198
1199void NuPlayer::cancelPollDuration() {
1200    ++mPollDurationGeneration;
1201}
1202
1203void NuPlayer::processDeferredActions() {
1204    while (!mDeferredActions.empty()) {
1205        // We won't execute any deferred actions until we're no longer in
1206        // an intermediate state, i.e. one more more decoders are currently
1207        // flushing or shutting down.
1208
1209        if (mRenderer != NULL) {
1210            // There's an edge case where the renderer owns all output
1211            // buffers and is paused, therefore the decoder will not read
1212            // more input data and will never encounter the matching
1213            // discontinuity. To avoid this, we resume the renderer.
1214
1215            if (mFlushingAudio == AWAITING_DISCONTINUITY
1216                    || mFlushingVideo == AWAITING_DISCONTINUITY) {
1217                mRenderer->resume();
1218            }
1219        }
1220
1221        if (mFlushingAudio != NONE || mFlushingVideo != NONE) {
1222            // We're currently flushing, postpone the reset until that's
1223            // completed.
1224
1225            ALOGV("postponing action mFlushingAudio=%d, mFlushingVideo=%d",
1226                  mFlushingAudio, mFlushingVideo);
1227
1228            break;
1229        }
1230
1231        sp<Action> action = *mDeferredActions.begin();
1232        mDeferredActions.erase(mDeferredActions.begin());
1233
1234        action->execute(this);
1235    }
1236}
1237
1238void NuPlayer::performSeek(int64_t seekTimeUs) {
1239    ALOGV("performSeek seekTimeUs=%lld us (%.2f secs)",
1240          seekTimeUs,
1241          seekTimeUs / 1E6);
1242
1243    mSource->seekTo(seekTimeUs);
1244
1245    if (mDriver != NULL) {
1246        sp<NuPlayerDriver> driver = mDriver.promote();
1247        if (driver != NULL) {
1248            driver->notifyPosition(seekTimeUs);
1249            driver->notifySeekComplete();
1250        }
1251    }
1252
1253    // everything's flushed, continue playback.
1254}
1255
1256void NuPlayer::performDecoderFlush() {
1257    ALOGV("performDecoderFlush");
1258
1259    if (mAudioDecoder == NULL && mVideoDecoder == NULL) {
1260        return;
1261    }
1262
1263    mTimeDiscontinuityPending = true;
1264
1265    if (mAudioDecoder != NULL) {
1266        flushDecoder(true /* audio */, false /* needShutdown */);
1267    }
1268
1269    if (mVideoDecoder != NULL) {
1270        flushDecoder(false /* audio */, false /* needShutdown */);
1271    }
1272}
1273
1274void NuPlayer::performDecoderShutdown(bool audio, bool video) {
1275    ALOGV("performDecoderShutdown audio=%d, video=%d", audio, video);
1276
1277    if ((!audio || mAudioDecoder == NULL)
1278            && (!video || mVideoDecoder == NULL)) {
1279        return;
1280    }
1281
1282    mTimeDiscontinuityPending = true;
1283
1284    if (mFlushingAudio == NONE && (!audio || mAudioDecoder == NULL)) {
1285        mFlushingAudio = FLUSHED;
1286    }
1287
1288    if (mFlushingVideo == NONE && (!video || mVideoDecoder == NULL)) {
1289        mFlushingVideo = FLUSHED;
1290    }
1291
1292    if (audio && mAudioDecoder != NULL) {
1293        flushDecoder(true /* audio */, true /* needShutdown */);
1294    }
1295
1296    if (video && mVideoDecoder != NULL) {
1297        flushDecoder(false /* audio */, true /* needShutdown */);
1298    }
1299}
1300
1301void NuPlayer::performReset() {
1302    ALOGV("performReset");
1303
1304    CHECK(mAudioDecoder == NULL);
1305    CHECK(mVideoDecoder == NULL);
1306
1307    cancelPollDuration();
1308
1309    ++mScanSourcesGeneration;
1310    mScanSourcesPending = false;
1311
1312    mRenderer.clear();
1313
1314    if (mSource != NULL) {
1315        mSource->stop();
1316
1317        looper()->unregisterHandler(mSource->id());
1318
1319        mSource.clear();
1320    }
1321
1322    if (mDriver != NULL) {
1323        sp<NuPlayerDriver> driver = mDriver.promote();
1324        if (driver != NULL) {
1325            driver->notifyResetComplete();
1326        }
1327    }
1328
1329    mStarted = false;
1330}
1331
1332void NuPlayer::performScanSources() {
1333    ALOGV("performScanSources");
1334
1335    if (!mStarted) {
1336        return;
1337    }
1338
1339    if (mAudioDecoder == NULL || mVideoDecoder == NULL) {
1340        postScanSources();
1341    }
1342}
1343
1344void NuPlayer::performSetSurface(const sp<NativeWindowWrapper> &wrapper) {
1345    ALOGV("performSetSurface");
1346
1347    mNativeWindow = wrapper;
1348
1349    // XXX - ignore error from setVideoScalingMode for now
1350    setVideoScalingMode(mVideoScalingMode);
1351
1352    if (mDriver != NULL) {
1353        sp<NuPlayerDriver> driver = mDriver.promote();
1354        if (driver != NULL) {
1355            driver->notifySetSurfaceComplete();
1356        }
1357    }
1358}
1359
1360void NuPlayer::onSourceNotify(const sp<AMessage> &msg) {
1361    int32_t what;
1362    CHECK(msg->findInt32("what", &what));
1363
1364    switch (what) {
1365        case Source::kWhatPrepared:
1366        {
1367            if (mSource == NULL) {
1368                // This is a stale notification from a source that was
1369                // asynchronously preparing when the client called reset().
1370                // We handled the reset, the source is gone.
1371                break;
1372            }
1373
1374            int32_t err;
1375            CHECK(msg->findInt32("err", &err));
1376
1377            sp<NuPlayerDriver> driver = mDriver.promote();
1378            if (driver != NULL) {
1379                driver->notifyPrepareCompleted(err);
1380            }
1381
1382            int64_t durationUs;
1383            if (mDriver != NULL && mSource->getDuration(&durationUs) == OK) {
1384                sp<NuPlayerDriver> driver = mDriver.promote();
1385                if (driver != NULL) {
1386                    driver->notifyDuration(durationUs);
1387                }
1388            }
1389            break;
1390        }
1391
1392        case Source::kWhatFlagsChanged:
1393        {
1394            uint32_t flags;
1395            CHECK(msg->findInt32("flags", (int32_t *)&flags));
1396
1397            sp<NuPlayerDriver> driver = mDriver.promote();
1398            if (driver != NULL) {
1399                driver->notifyFlagsChanged(flags);
1400            }
1401
1402            if ((mSourceFlags & Source::FLAG_DYNAMIC_DURATION)
1403                    && (!(flags & Source::FLAG_DYNAMIC_DURATION))) {
1404                cancelPollDuration();
1405            } else if (!(mSourceFlags & Source::FLAG_DYNAMIC_DURATION)
1406                    && (flags & Source::FLAG_DYNAMIC_DURATION)
1407                    && (mAudioDecoder != NULL || mVideoDecoder != NULL)) {
1408                schedulePollDuration();
1409            }
1410
1411            mSourceFlags = flags;
1412            break;
1413        }
1414
1415        case Source::kWhatVideoSizeChanged:
1416        {
1417            int32_t width, height;
1418            CHECK(msg->findInt32("width", &width));
1419            CHECK(msg->findInt32("height", &height));
1420
1421            notifyListener(MEDIA_SET_VIDEO_SIZE, width, height);
1422            break;
1423        }
1424
1425        case Source::kWhatBufferingStart:
1426        {
1427            notifyListener(MEDIA_INFO, MEDIA_INFO_BUFFERING_START, 0);
1428            break;
1429        }
1430
1431        case Source::kWhatBufferingEnd:
1432        {
1433            notifyListener(MEDIA_INFO, MEDIA_INFO_BUFFERING_END, 0);
1434            break;
1435        }
1436
1437        case Source::kWhatSubtitleData:
1438        {
1439            sp<ABuffer> buffer;
1440            CHECK(msg->findBuffer("buffer", &buffer));
1441
1442            int32_t trackIndex;
1443            int64_t timeUs, durationUs;
1444            CHECK(buffer->meta()->findInt32("trackIndex", &trackIndex));
1445            CHECK(buffer->meta()->findInt64("timeUs", &timeUs));
1446            CHECK(buffer->meta()->findInt64("durationUs", &durationUs));
1447
1448            Parcel in;
1449            in.writeInt32(trackIndex);
1450            in.writeInt64(timeUs);
1451            in.writeInt64(durationUs);
1452            in.writeInt32(buffer->size());
1453            in.writeInt32(buffer->size());
1454            in.write(buffer->data(), buffer->size());
1455
1456            notifyListener(MEDIA_SUBTITLE_DATA, 0, 0, &in);
1457            break;
1458        }
1459
1460        case Source::kWhatQueueDecoderShutdown:
1461        {
1462            int32_t audio, video;
1463            CHECK(msg->findInt32("audio", &audio));
1464            CHECK(msg->findInt32("video", &video));
1465
1466            sp<AMessage> reply;
1467            CHECK(msg->findMessage("reply", &reply));
1468
1469            queueDecoderShutdown(audio, video, reply);
1470            break;
1471        }
1472
1473        default:
1474            TRESPASS();
1475    }
1476}
1477
1478////////////////////////////////////////////////////////////////////////////////
1479
1480void NuPlayer::Source::notifyFlagsChanged(uint32_t flags) {
1481    sp<AMessage> notify = dupNotify();
1482    notify->setInt32("what", kWhatFlagsChanged);
1483    notify->setInt32("flags", flags);
1484    notify->post();
1485}
1486
1487void NuPlayer::Source::notifyVideoSizeChanged(int32_t width, int32_t height) {
1488    sp<AMessage> notify = dupNotify();
1489    notify->setInt32("what", kWhatVideoSizeChanged);
1490    notify->setInt32("width", width);
1491    notify->setInt32("height", height);
1492    notify->post();
1493}
1494
1495void NuPlayer::Source::notifyPrepared(status_t err) {
1496    sp<AMessage> notify = dupNotify();
1497    notify->setInt32("what", kWhatPrepared);
1498    notify->setInt32("err", err);
1499    notify->post();
1500}
1501
1502void NuPlayer::Source::onMessageReceived(const sp<AMessage> & /* msg */) {
1503    TRESPASS();
1504}
1505
1506void NuPlayer::queueDecoderShutdown(
1507        bool audio, bool video, const sp<AMessage> &reply) {
1508    ALOGI("queueDecoderShutdown audio=%d, video=%d", audio, video);
1509
1510    mDeferredActions.push_back(
1511            new ShutdownDecoderAction(audio, video));
1512
1513    mDeferredActions.push_back(
1514            new SimpleAction(&NuPlayer::performScanSources));
1515
1516    mDeferredActions.push_back(new PostMessageAction(reply));
1517
1518    processDeferredActions();
1519}
1520
1521}  // namespace android
1522