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      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 "StreamingSource.h"
     29 
     30 #include "ATSParser.h"
     31 
     32 #include <media/stagefright/foundation/hexdump.h>
     33 #include <media/stagefright/foundation/ABuffer.h>
     34 #include <media/stagefright/foundation/ADebug.h>
     35 #include <media/stagefright/foundation/AMessage.h>
     36 #include <media/stagefright/ACodec.h>
     37 #include <media/stagefright/MediaDefs.h>
     38 #include <media/stagefright/MediaErrors.h>
     39 #include <media/stagefright/MetaData.h>
     40 #include <surfaceflinger/Surface.h>
     41 #include <gui/ISurfaceTexture.h>
     42 
     43 #include "avc_utils.h"
     44 
     45 namespace android {
     46 
     47 ////////////////////////////////////////////////////////////////////////////////
     48 
     49 NuPlayer::NuPlayer()
     50     : mUIDValid(false),
     51       mVideoIsAVC(false),
     52       mAudioEOS(false),
     53       mVideoEOS(false),
     54       mScanSourcesPending(false),
     55       mScanSourcesGeneration(0),
     56       mFlushingAudio(NONE),
     57       mFlushingVideo(NONE),
     58       mResetInProgress(false),
     59       mResetPostponed(false),
     60       mSkipRenderingAudioUntilMediaTimeUs(-1ll),
     61       mSkipRenderingVideoUntilMediaTimeUs(-1ll),
     62       mVideoLateByUs(0ll),
     63       mNumFramesTotal(0ll),
     64       mNumFramesDropped(0ll) {
     65 }
     66 
     67 NuPlayer::~NuPlayer() {
     68 }
     69 
     70 void NuPlayer::setUID(uid_t uid) {
     71     mUIDValid = true;
     72     mUID = uid;
     73 }
     74 
     75 void NuPlayer::setDriver(const wp<NuPlayerDriver> &driver) {
     76     mDriver = driver;
     77 }
     78 
     79 void NuPlayer::setDataSource(const sp<IStreamSource> &source) {
     80     sp<AMessage> msg = new AMessage(kWhatSetDataSource, id());
     81 
     82     msg->setObject("source", new StreamingSource(source));
     83     msg->post();
     84 }
     85 
     86 void NuPlayer::setDataSource(
     87         const char *url, const KeyedVector<String8, String8> *headers) {
     88     sp<AMessage> msg = new AMessage(kWhatSetDataSource, id());
     89 
     90     msg->setObject("source", new HTTPLiveSource(url, headers, mUIDValid, mUID));
     91     msg->post();
     92 }
     93 
     94 void NuPlayer::setVideoSurface(const sp<Surface> &surface) {
     95     sp<AMessage> msg = new AMessage(kWhatSetVideoNativeWindow, id());
     96     msg->setObject("native-window", new NativeWindowWrapper(surface));
     97     msg->post();
     98 }
     99 
    100 void NuPlayer::setVideoSurfaceTexture(const sp<ISurfaceTexture> &surfaceTexture) {
    101     sp<AMessage> msg = new AMessage(kWhatSetVideoNativeWindow, id());
    102     sp<SurfaceTextureClient> surfaceTextureClient(surfaceTexture != NULL ?
    103                 new SurfaceTextureClient(surfaceTexture) : NULL);
    104     msg->setObject("native-window", new NativeWindowWrapper(surfaceTextureClient));
    105     msg->post();
    106 }
    107 
    108 void NuPlayer::setAudioSink(const sp<MediaPlayerBase::AudioSink> &sink) {
    109     sp<AMessage> msg = new AMessage(kWhatSetAudioSink, id());
    110     msg->setObject("sink", sink);
    111     msg->post();
    112 }
    113 
    114 void NuPlayer::start() {
    115     (new AMessage(kWhatStart, id()))->post();
    116 }
    117 
    118 void NuPlayer::pause() {
    119     (new AMessage(kWhatPause, id()))->post();
    120 }
    121 
    122 void NuPlayer::resume() {
    123     (new AMessage(kWhatResume, id()))->post();
    124 }
    125 
    126 void NuPlayer::resetAsync() {
    127     (new AMessage(kWhatReset, id()))->post();
    128 }
    129 
    130 void NuPlayer::seekToAsync(int64_t seekTimeUs) {
    131     sp<AMessage> msg = new AMessage(kWhatSeek, id());
    132     msg->setInt64("seekTimeUs", seekTimeUs);
    133     msg->post();
    134 }
    135 
    136 // static
    137 bool NuPlayer::IsFlushingState(FlushStatus state, bool *needShutdown) {
    138     switch (state) {
    139         case FLUSHING_DECODER:
    140             if (needShutdown != NULL) {
    141                 *needShutdown = false;
    142             }
    143             return true;
    144 
    145         case FLUSHING_DECODER_SHUTDOWN:
    146             if (needShutdown != NULL) {
    147                 *needShutdown = true;
    148             }
    149             return true;
    150 
    151         default:
    152             return false;
    153     }
    154 }
    155 
    156 void NuPlayer::onMessageReceived(const sp<AMessage> &msg) {
    157     switch (msg->what()) {
    158         case kWhatSetDataSource:
    159         {
    160             LOGV("kWhatSetDataSource");
    161 
    162             CHECK(mSource == NULL);
    163 
    164             sp<RefBase> obj;
    165             CHECK(msg->findObject("source", &obj));
    166 
    167             mSource = static_cast<Source *>(obj.get());
    168             break;
    169         }
    170 
    171         case kWhatSetVideoNativeWindow:
    172         {
    173             LOGV("kWhatSetVideoNativeWindow");
    174 
    175             sp<RefBase> obj;
    176             CHECK(msg->findObject("native-window", &obj));
    177 
    178             mNativeWindow = static_cast<NativeWindowWrapper *>(obj.get());
    179             break;
    180         }
    181 
    182         case kWhatSetAudioSink:
    183         {
    184             LOGV("kWhatSetAudioSink");
    185 
    186             sp<RefBase> obj;
    187             CHECK(msg->findObject("sink", &obj));
    188 
    189             mAudioSink = static_cast<MediaPlayerBase::AudioSink *>(obj.get());
    190             break;
    191         }
    192 
    193         case kWhatStart:
    194         {
    195             LOGV("kWhatStart");
    196 
    197             mVideoIsAVC = false;
    198             mAudioEOS = false;
    199             mVideoEOS = false;
    200             mSkipRenderingAudioUntilMediaTimeUs = -1;
    201             mSkipRenderingVideoUntilMediaTimeUs = -1;
    202             mVideoLateByUs = 0;
    203             mNumFramesTotal = 0;
    204             mNumFramesDropped = 0;
    205 
    206             mSource->start();
    207 
    208             mRenderer = new Renderer(
    209                     mAudioSink,
    210                     new AMessage(kWhatRendererNotify, id()));
    211 
    212             looper()->registerHandler(mRenderer);
    213 
    214             postScanSources();
    215             break;
    216         }
    217 
    218         case kWhatScanSources:
    219         {
    220             int32_t generation;
    221             CHECK(msg->findInt32("generation", &generation));
    222             if (generation != mScanSourcesGeneration) {
    223                 // Drop obsolete msg.
    224                 break;
    225             }
    226 
    227             mScanSourcesPending = false;
    228 
    229             LOGV("scanning sources haveAudio=%d, haveVideo=%d",
    230                  mAudioDecoder != NULL, mVideoDecoder != NULL);
    231 
    232             instantiateDecoder(false, &mVideoDecoder);
    233 
    234             if (mAudioSink != NULL) {
    235                 instantiateDecoder(true, &mAudioDecoder);
    236             }
    237 
    238             status_t err;
    239             if ((err = mSource->feedMoreTSData()) != OK) {
    240                 if (mAudioDecoder == NULL && mVideoDecoder == NULL) {
    241                     // We're not currently decoding anything (no audio or
    242                     // video tracks found) and we just ran out of input data.
    243 
    244                     if (err == ERROR_END_OF_STREAM) {
    245                         notifyListener(MEDIA_PLAYBACK_COMPLETE, 0, 0);
    246                     } else {
    247                         notifyListener(MEDIA_ERROR, MEDIA_ERROR_UNKNOWN, err);
    248                     }
    249                 }
    250                 break;
    251             }
    252 
    253             if (mAudioDecoder == NULL || mVideoDecoder == NULL) {
    254                 msg->post(100000ll);
    255                 mScanSourcesPending = true;
    256             }
    257             break;
    258         }
    259 
    260         case kWhatVideoNotify:
    261         case kWhatAudioNotify:
    262         {
    263             bool audio = msg->what() == kWhatAudioNotify;
    264 
    265             sp<AMessage> codecRequest;
    266             CHECK(msg->findMessage("codec-request", &codecRequest));
    267 
    268             int32_t what;
    269             CHECK(codecRequest->findInt32("what", &what));
    270 
    271             if (what == ACodec::kWhatFillThisBuffer) {
    272                 status_t err = feedDecoderInputData(
    273                         audio, codecRequest);
    274 
    275                 if (err == -EWOULDBLOCK) {
    276                     if (mSource->feedMoreTSData() == OK) {
    277                         msg->post(10000ll);
    278                     }
    279                 }
    280             } else if (what == ACodec::kWhatEOS) {
    281                 int32_t err;
    282                 CHECK(codecRequest->findInt32("err", &err));
    283 
    284                 if (err == ERROR_END_OF_STREAM) {
    285                     LOGV("got %s decoder EOS", audio ? "audio" : "video");
    286                 } else {
    287                     LOGV("got %s decoder EOS w/ error %d",
    288                          audio ? "audio" : "video",
    289                          err);
    290                 }
    291 
    292                 mRenderer->queueEOS(audio, err);
    293             } else if (what == ACodec::kWhatFlushCompleted) {
    294                 bool needShutdown;
    295 
    296                 if (audio) {
    297                     CHECK(IsFlushingState(mFlushingAudio, &needShutdown));
    298                     mFlushingAudio = FLUSHED;
    299                 } else {
    300                     CHECK(IsFlushingState(mFlushingVideo, &needShutdown));
    301                     mFlushingVideo = FLUSHED;
    302 
    303                     mVideoLateByUs = 0;
    304                 }
    305 
    306                 LOGV("decoder %s flush completed", audio ? "audio" : "video");
    307 
    308                 if (needShutdown) {
    309                     LOGV("initiating %s decoder shutdown",
    310                          audio ? "audio" : "video");
    311 
    312                     (audio ? mAudioDecoder : mVideoDecoder)->initiateShutdown();
    313 
    314                     if (audio) {
    315                         mFlushingAudio = SHUTTING_DOWN_DECODER;
    316                     } else {
    317                         mFlushingVideo = SHUTTING_DOWN_DECODER;
    318                     }
    319                 }
    320 
    321                 finishFlushIfPossible();
    322             } else if (what == ACodec::kWhatOutputFormatChanged) {
    323                 if (audio) {
    324                     int32_t numChannels;
    325                     CHECK(codecRequest->findInt32("channel-count", &numChannels));
    326 
    327                     int32_t sampleRate;
    328                     CHECK(codecRequest->findInt32("sample-rate", &sampleRate));
    329 
    330                     LOGV("Audio output format changed to %d Hz, %d channels",
    331                          sampleRate, numChannels);
    332 
    333                     mAudioSink->close();
    334                     CHECK_EQ(mAudioSink->open(
    335                                 sampleRate,
    336                                 numChannels,
    337                                 AUDIO_FORMAT_PCM_16_BIT,
    338                                 8 /* bufferCount */),
    339                              (status_t)OK);
    340                     mAudioSink->start();
    341 
    342                     mRenderer->signalAudioSinkChanged();
    343                 } else {
    344                     // video
    345 
    346                     int32_t width, height;
    347                     CHECK(codecRequest->findInt32("width", &width));
    348                     CHECK(codecRequest->findInt32("height", &height));
    349 
    350                     int32_t cropLeft, cropTop, cropRight, cropBottom;
    351                     CHECK(codecRequest->findRect(
    352                                 "crop",
    353                                 &cropLeft, &cropTop, &cropRight, &cropBottom));
    354 
    355                     LOGV("Video output format changed to %d x %d "
    356                          "(crop: %d x %d @ (%d, %d))",
    357                          width, height,
    358                          (cropRight - cropLeft + 1),
    359                          (cropBottom - cropTop + 1),
    360                          cropLeft, cropTop);
    361 
    362                     notifyListener(
    363                             MEDIA_SET_VIDEO_SIZE,
    364                             cropRight - cropLeft + 1,
    365                             cropBottom - cropTop + 1);
    366                 }
    367             } else if (what == ACodec::kWhatShutdownCompleted) {
    368                 LOGV("%s shutdown completed", audio ? "audio" : "video");
    369                 if (audio) {
    370                     mAudioDecoder.clear();
    371 
    372                     CHECK_EQ((int)mFlushingAudio, (int)SHUTTING_DOWN_DECODER);
    373                     mFlushingAudio = SHUT_DOWN;
    374                 } else {
    375                     mVideoDecoder.clear();
    376 
    377                     CHECK_EQ((int)mFlushingVideo, (int)SHUTTING_DOWN_DECODER);
    378                     mFlushingVideo = SHUT_DOWN;
    379                 }
    380 
    381                 finishFlushIfPossible();
    382             } else if (what == ACodec::kWhatError) {
    383                 LOGE("Received error from %s decoder, aborting playback.",
    384                      audio ? "audio" : "video");
    385 
    386                 mRenderer->queueEOS(audio, UNKNOWN_ERROR);
    387             } else {
    388                 CHECK_EQ((int)what, (int)ACodec::kWhatDrainThisBuffer);
    389 
    390                 renderBuffer(audio, codecRequest);
    391             }
    392 
    393             break;
    394         }
    395 
    396         case kWhatRendererNotify:
    397         {
    398             int32_t what;
    399             CHECK(msg->findInt32("what", &what));
    400 
    401             if (what == Renderer::kWhatEOS) {
    402                 int32_t audio;
    403                 CHECK(msg->findInt32("audio", &audio));
    404 
    405                 int32_t finalResult;
    406                 CHECK(msg->findInt32("finalResult", &finalResult));
    407 
    408                 if (audio) {
    409                     mAudioEOS = true;
    410                 } else {
    411                     mVideoEOS = true;
    412                 }
    413 
    414                 if (finalResult == ERROR_END_OF_STREAM) {
    415                     LOGV("reached %s EOS", audio ? "audio" : "video");
    416                 } else {
    417                     LOGE("%s track encountered an error (%d)",
    418                          audio ? "audio" : "video", finalResult);
    419 
    420                     notifyListener(
    421                             MEDIA_ERROR, MEDIA_ERROR_UNKNOWN, finalResult);
    422                 }
    423 
    424                 if ((mAudioEOS || mAudioDecoder == NULL)
    425                         && (mVideoEOS || mVideoDecoder == NULL)) {
    426                     notifyListener(MEDIA_PLAYBACK_COMPLETE, 0, 0);
    427                 }
    428             } else if (what == Renderer::kWhatPosition) {
    429                 int64_t positionUs;
    430                 CHECK(msg->findInt64("positionUs", &positionUs));
    431 
    432                 CHECK(msg->findInt64("videoLateByUs", &mVideoLateByUs));
    433 
    434                 if (mDriver != NULL) {
    435                     sp<NuPlayerDriver> driver = mDriver.promote();
    436                     if (driver != NULL) {
    437                         driver->notifyPosition(positionUs);
    438 
    439                         driver->notifyFrameStats(
    440                                 mNumFramesTotal, mNumFramesDropped);
    441                     }
    442                 }
    443             } else if (what == Renderer::kWhatFlushComplete) {
    444                 CHECK_EQ(what, (int32_t)Renderer::kWhatFlushComplete);
    445 
    446                 int32_t audio;
    447                 CHECK(msg->findInt32("audio", &audio));
    448 
    449                 LOGV("renderer %s flush completed.", audio ? "audio" : "video");
    450             }
    451             break;
    452         }
    453 
    454         case kWhatMoreDataQueued:
    455         {
    456             break;
    457         }
    458 
    459         case kWhatReset:
    460         {
    461             LOGV("kWhatReset");
    462 
    463             if (mFlushingAudio != NONE || mFlushingVideo != NONE) {
    464                 // We're currently flushing, postpone the reset until that's
    465                 // completed.
    466 
    467                 LOGV("postponing reset");
    468 
    469                 mResetPostponed = true;
    470                 break;
    471             }
    472 
    473             if (mAudioDecoder == NULL && mVideoDecoder == NULL) {
    474                 finishReset();
    475                 break;
    476             }
    477 
    478             if (mAudioDecoder != NULL) {
    479                 flushDecoder(true /* audio */, true /* needShutdown */);
    480             }
    481 
    482             if (mVideoDecoder != NULL) {
    483                 flushDecoder(false /* audio */, true /* needShutdown */);
    484             }
    485 
    486             mResetInProgress = true;
    487             break;
    488         }
    489 
    490         case kWhatSeek:
    491         {
    492             int64_t seekTimeUs;
    493             CHECK(msg->findInt64("seekTimeUs", &seekTimeUs));
    494 
    495             LOGV("kWhatSeek seekTimeUs=%lld us (%.2f secs)",
    496                  seekTimeUs, seekTimeUs / 1E6);
    497 
    498             mSource->seekTo(seekTimeUs);
    499 
    500             if (mDriver != NULL) {
    501                 sp<NuPlayerDriver> driver = mDriver.promote();
    502                 if (driver != NULL) {
    503                     driver->notifySeekComplete();
    504                 }
    505             }
    506 
    507             break;
    508         }
    509 
    510         case kWhatPause:
    511         {
    512             CHECK(mRenderer != NULL);
    513             mRenderer->pause();
    514             break;
    515         }
    516 
    517         case kWhatResume:
    518         {
    519             CHECK(mRenderer != NULL);
    520             mRenderer->resume();
    521             break;
    522         }
    523 
    524         default:
    525             TRESPASS();
    526             break;
    527     }
    528 }
    529 
    530 void NuPlayer::finishFlushIfPossible() {
    531     if (mFlushingAudio != FLUSHED && mFlushingAudio != SHUT_DOWN) {
    532         return;
    533     }
    534 
    535     if (mFlushingVideo != FLUSHED && mFlushingVideo != SHUT_DOWN) {
    536         return;
    537     }
    538 
    539     LOGV("both audio and video are flushed now.");
    540 
    541     mRenderer->signalTimeDiscontinuity();
    542 
    543     if (mAudioDecoder != NULL) {
    544         mAudioDecoder->signalResume();
    545     }
    546 
    547     if (mVideoDecoder != NULL) {
    548         mVideoDecoder->signalResume();
    549     }
    550 
    551     mFlushingAudio = NONE;
    552     mFlushingVideo = NONE;
    553 
    554     if (mResetInProgress) {
    555         LOGV("reset completed");
    556 
    557         mResetInProgress = false;
    558         finishReset();
    559     } else if (mResetPostponed) {
    560         (new AMessage(kWhatReset, id()))->post();
    561         mResetPostponed = false;
    562     } else if (mAudioDecoder == NULL || mVideoDecoder == NULL) {
    563         postScanSources();
    564     }
    565 }
    566 
    567 void NuPlayer::finishReset() {
    568     CHECK(mAudioDecoder == NULL);
    569     CHECK(mVideoDecoder == NULL);
    570 
    571     mRenderer.clear();
    572     mSource.clear();
    573 
    574     if (mDriver != NULL) {
    575         sp<NuPlayerDriver> driver = mDriver.promote();
    576         if (driver != NULL) {
    577             driver->notifyResetComplete();
    578         }
    579     }
    580 }
    581 
    582 void NuPlayer::postScanSources() {
    583     if (mScanSourcesPending) {
    584         return;
    585     }
    586 
    587     sp<AMessage> msg = new AMessage(kWhatScanSources, id());
    588     msg->setInt32("generation", mScanSourcesGeneration);
    589     msg->post();
    590 
    591     mScanSourcesPending = true;
    592 }
    593 
    594 status_t NuPlayer::instantiateDecoder(bool audio, sp<Decoder> *decoder) {
    595     if (*decoder != NULL) {
    596         return OK;
    597     }
    598 
    599     sp<MetaData> meta = mSource->getFormat(audio);
    600 
    601     if (meta == NULL) {
    602         return -EWOULDBLOCK;
    603     }
    604 
    605     if (!audio) {
    606         const char *mime;
    607         CHECK(meta->findCString(kKeyMIMEType, &mime));
    608         mVideoIsAVC = !strcasecmp(MEDIA_MIMETYPE_VIDEO_AVC, mime);
    609     }
    610 
    611     sp<AMessage> notify =
    612         new AMessage(audio ? kWhatAudioNotify : kWhatVideoNotify,
    613                      id());
    614 
    615     *decoder = audio ? new Decoder(notify) :
    616                        new Decoder(notify, mNativeWindow);
    617     looper()->registerHandler(*decoder);
    618 
    619     (*decoder)->configure(meta);
    620 
    621     int64_t durationUs;
    622     if (mDriver != NULL && mSource->getDuration(&durationUs) == OK) {
    623         sp<NuPlayerDriver> driver = mDriver.promote();
    624         if (driver != NULL) {
    625             driver->notifyDuration(durationUs);
    626         }
    627     }
    628 
    629     return OK;
    630 }
    631 
    632 status_t NuPlayer::feedDecoderInputData(bool audio, const sp<AMessage> &msg) {
    633     sp<AMessage> reply;
    634     CHECK(msg->findMessage("reply", &reply));
    635 
    636     if ((audio && IsFlushingState(mFlushingAudio))
    637             || (!audio && IsFlushingState(mFlushingVideo))) {
    638         reply->setInt32("err", INFO_DISCONTINUITY);
    639         reply->post();
    640         return OK;
    641     }
    642 
    643     sp<ABuffer> accessUnit;
    644 
    645     bool dropAccessUnit;
    646     do {
    647         status_t err = mSource->dequeueAccessUnit(audio, &accessUnit);
    648 
    649         if (err == -EWOULDBLOCK) {
    650             return err;
    651         } else if (err != OK) {
    652             if (err == INFO_DISCONTINUITY) {
    653                 int32_t type;
    654                 CHECK(accessUnit->meta()->findInt32("discontinuity", &type));
    655 
    656                 bool formatChange =
    657                     type == ATSParser::DISCONTINUITY_FORMATCHANGE;
    658 
    659                 LOGV("%s discontinuity (formatChange=%d)",
    660                      audio ? "audio" : "video", formatChange);
    661 
    662                 if (audio) {
    663                     mSkipRenderingAudioUntilMediaTimeUs = -1;
    664                 } else {
    665                     mSkipRenderingVideoUntilMediaTimeUs = -1;
    666                 }
    667 
    668                 sp<AMessage> extra;
    669                 if (accessUnit->meta()->findMessage("extra", &extra)
    670                         && extra != NULL) {
    671                     int64_t resumeAtMediaTimeUs;
    672                     if (extra->findInt64(
    673                                 "resume-at-mediatimeUs", &resumeAtMediaTimeUs)) {
    674                         LOGI("suppressing rendering of %s until %lld us",
    675                                 audio ? "audio" : "video", resumeAtMediaTimeUs);
    676 
    677                         if (audio) {
    678                             mSkipRenderingAudioUntilMediaTimeUs =
    679                                 resumeAtMediaTimeUs;
    680                         } else {
    681                             mSkipRenderingVideoUntilMediaTimeUs =
    682                                 resumeAtMediaTimeUs;
    683                         }
    684                     }
    685                 }
    686 
    687                 flushDecoder(audio, formatChange);
    688             }
    689 
    690             reply->setInt32("err", err);
    691             reply->post();
    692             return OK;
    693         }
    694 
    695         if (!audio) {
    696             ++mNumFramesTotal;
    697         }
    698 
    699         dropAccessUnit = false;
    700         if (!audio
    701                 && mVideoLateByUs > 100000ll
    702                 && mVideoIsAVC
    703                 && !IsAVCReferenceFrame(accessUnit)) {
    704             dropAccessUnit = true;
    705             ++mNumFramesDropped;
    706         }
    707     } while (dropAccessUnit);
    708 
    709     // LOGV("returned a valid buffer of %s data", audio ? "audio" : "video");
    710 
    711 #if 0
    712     int64_t mediaTimeUs;
    713     CHECK(accessUnit->meta()->findInt64("timeUs", &mediaTimeUs));
    714     LOGV("feeding %s input buffer at media time %.2f secs",
    715          audio ? "audio" : "video",
    716          mediaTimeUs / 1E6);
    717 #endif
    718 
    719     reply->setObject("buffer", accessUnit);
    720     reply->post();
    721 
    722     return OK;
    723 }
    724 
    725 void NuPlayer::renderBuffer(bool audio, const sp<AMessage> &msg) {
    726     // LOGV("renderBuffer %s", audio ? "audio" : "video");
    727 
    728     sp<AMessage> reply;
    729     CHECK(msg->findMessage("reply", &reply));
    730 
    731     if (IsFlushingState(audio ? mFlushingAudio : mFlushingVideo)) {
    732         // We're currently attempting to flush the decoder, in order
    733         // to complete this, the decoder wants all its buffers back,
    734         // so we don't want any output buffers it sent us (from before
    735         // we initiated the flush) to be stuck in the renderer's queue.
    736 
    737         LOGV("we're still flushing the %s decoder, sending its output buffer"
    738              " right back.", audio ? "audio" : "video");
    739 
    740         reply->post();
    741         return;
    742     }
    743 
    744     sp<RefBase> obj;
    745     CHECK(msg->findObject("buffer", &obj));
    746 
    747     sp<ABuffer> buffer = static_cast<ABuffer *>(obj.get());
    748 
    749     int64_t &skipUntilMediaTimeUs =
    750         audio
    751             ? mSkipRenderingAudioUntilMediaTimeUs
    752             : mSkipRenderingVideoUntilMediaTimeUs;
    753 
    754     if (skipUntilMediaTimeUs >= 0) {
    755         int64_t mediaTimeUs;
    756         CHECK(buffer->meta()->findInt64("timeUs", &mediaTimeUs));
    757 
    758         if (mediaTimeUs < skipUntilMediaTimeUs) {
    759             LOGV("dropping %s buffer at time %lld as requested.",
    760                  audio ? "audio" : "video",
    761                  mediaTimeUs);
    762 
    763             reply->post();
    764             return;
    765         }
    766 
    767         skipUntilMediaTimeUs = -1;
    768     }
    769 
    770     mRenderer->queueBuffer(audio, buffer, reply);
    771 }
    772 
    773 void NuPlayer::notifyListener(int msg, int ext1, int ext2) {
    774     if (mDriver == NULL) {
    775         return;
    776     }
    777 
    778     sp<NuPlayerDriver> driver = mDriver.promote();
    779 
    780     if (driver == NULL) {
    781         return;
    782     }
    783 
    784     driver->sendEvent(msg, ext1, ext2);
    785 }
    786 
    787 void NuPlayer::flushDecoder(bool audio, bool needShutdown) {
    788     // Make sure we don't continue to scan sources until we finish flushing.
    789     ++mScanSourcesGeneration;
    790     mScanSourcesPending = false;
    791 
    792     (audio ? mAudioDecoder : mVideoDecoder)->signalFlush();
    793     mRenderer->flush(audio);
    794 
    795     FlushStatus newStatus =
    796         needShutdown ? FLUSHING_DECODER_SHUTDOWN : FLUSHING_DECODER;
    797 
    798     if (audio) {
    799         CHECK(mFlushingAudio == NONE
    800                 || mFlushingAudio == AWAITING_DISCONTINUITY);
    801 
    802         mFlushingAudio = newStatus;
    803 
    804         if (mFlushingVideo == NONE) {
    805             mFlushingVideo = (mVideoDecoder != NULL)
    806                 ? AWAITING_DISCONTINUITY
    807                 : FLUSHED;
    808         }
    809     } else {
    810         CHECK(mFlushingVideo == NONE
    811                 || mFlushingVideo == AWAITING_DISCONTINUITY);
    812 
    813         mFlushingVideo = newStatus;
    814 
    815         if (mFlushingAudio == NONE) {
    816             mFlushingAudio = (mAudioDecoder != NULL)
    817                 ? AWAITING_DISCONTINUITY
    818                 : FLUSHED;
    819         }
    820     }
    821 }
    822 
    823 }  // namespace android
    824