media/libmediaplayerservice/nuplayer/NuPlayer.cpp - platform/frameworks/base - Gitiles

 /*
  * Copyright (C) 2010 The Android Open Source Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *      http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */

 //#define LOG_NDEBUG 0
 #define LOG_TAG "NuPlayer"
 #include <utils/Log.h>

 #include "NuPlayer.h"

 #include "HTTPLiveSource.h"
 #include "NuPlayerDecoder.h"
 #include "NuPlayerDriver.h"
 #include "NuPlayerRenderer.h"
 #include "NuPlayerSource.h"
 #include "RTSPSource.h"
 #include "StreamingSource.h"

 #include "ATSParser.h"

 #include <media/stagefright/foundation/hexdump.h>
 #include <media/stagefright/foundation/ABuffer.h>
 #include <media/stagefright/foundation/ADebug.h>
 #include <media/stagefright/foundation/AMessage.h>
 #include <media/stagefright/ACodec.h>
 #include <media/stagefright/MediaDefs.h>
 #include <media/stagefright/MediaErrors.h>
 #include <media/stagefright/MetaData.h>
 #include <gui/ISurfaceTexture.h>

 #include "avc_utils.h"

 namespace android {

 ////////////////////////////////////////////////////////////////////////////////

 NuPlayer::NuPlayer()
     : mUIDValid(false),
       mVideoIsAVC(false),
       mAudioEOS(false),
       mVideoEOS(false),
       mScanSourcesPending(false),
       mScanSourcesGeneration(0),
       mTimeDiscontinuityPending(false),
       mFlushingAudio(NONE),
       mFlushingVideo(NONE),
       mResetInProgress(false),
       mResetPostponed(false),
       mSkipRenderingAudioUntilMediaTimeUs(-1ll),
       mSkipRenderingVideoUntilMediaTimeUs(-1ll),
       mVideoLateByUs(0ll),
       mNumFramesTotal(0ll),
       mNumFramesDropped(0ll) {
 }

 NuPlayer::~NuPlayer() {
 }

 void NuPlayer::setUID(uid_t uid) {
     mUIDValid = true;
     mUID = uid;
 }

 void NuPlayer::setDriver(const wp<NuPlayerDriver> &driver) {
     mDriver = driver;
 }

 void NuPlayer::setDataSource(const sp<IStreamSource> &source) {
     sp<AMessage> msg = new AMessage(kWhatSetDataSource, id());

     msg->setObject("source", new StreamingSource(source));
     msg->post();
 }

 void NuPlayer::setDataSource(
         const char *url, const KeyedVector<String8, String8> *headers) {
     sp<AMessage> msg = new AMessage(kWhatSetDataSource, id());

     if (!strncasecmp(url, "rtsp://", 7)) {
         msg->setObject(
                 "source", new RTSPSource(url, headers, mUIDValid, mUID));
     } else {
         msg->setObject(
                 "source", new HTTPLiveSource(url, headers, mUIDValid, mUID));
     }

     msg->post();
 }

 void NuPlayer::setVideoSurfaceTexture(const sp<ISurfaceTexture> &surfaceTexture) {
     sp<AMessage> msg = new AMessage(kWhatSetVideoNativeWindow, id());
     sp<SurfaceTextureClient> surfaceTextureClient(surfaceTexture != NULL ?
                 new SurfaceTextureClient(surfaceTexture) : NULL);
     msg->setObject("native-window", new NativeWindowWrapper(surfaceTextureClient));
     msg->post();
 }

 void NuPlayer::setAudioSink(const sp<MediaPlayerBase::AudioSink> &sink) {
     sp<AMessage> msg = new AMessage(kWhatSetAudioSink, id());
     msg->setObject("sink", sink);
     msg->post();
 }

 void NuPlayer::start() {
     (new AMessage(kWhatStart, id()))->post();
 }

 void NuPlayer::pause() {
     (new AMessage(kWhatPause, id()))->post();
 }

 void NuPlayer::resume() {
     (new AMessage(kWhatResume, id()))->post();
 }

 void NuPlayer::resetAsync() {
     (new AMessage(kWhatReset, id()))->post();
 }

 void NuPlayer::seekToAsync(int64_t seekTimeUs) {
     sp<AMessage> msg = new AMessage(kWhatSeek, id());
     msg->setInt64("seekTimeUs", seekTimeUs);
     msg->post();
 }

 // static
 bool NuPlayer::IsFlushingState(FlushStatus state, bool *needShutdown) {
     switch (state) {
         case FLUSHING_DECODER:
             if (needShutdown != NULL) {
                 *needShutdown = false;
             }
             return true;

         case FLUSHING_DECODER_SHUTDOWN:
             if (needShutdown != NULL) {
                 *needShutdown = true;
             }
             return true;

         default:
             return false;
     }
 }

 void NuPlayer::onMessageReceived(const sp<AMessage> &msg) {
     switch (msg->what()) {
         case kWhatSetDataSource:
         {
             ALOGV("kWhatSetDataSource");

             CHECK(mSource == NULL);

             sp<RefBase> obj;
             CHECK(msg->findObject("source", &obj));

             mSource = static_cast<Source *>(obj.get());
             break;
         }

         case kWhatSetVideoNativeWindow:
         {
             ALOGV("kWhatSetVideoNativeWindow");

             sp<RefBase> obj;
             CHECK(msg->findObject("native-window", &obj));

             mNativeWindow = static_cast<NativeWindowWrapper *>(obj.get());
             break;
         }

         case kWhatSetAudioSink:
         {
             ALOGV("kWhatSetAudioSink");

             sp<RefBase> obj;
             CHECK(msg->findObject("sink", &obj));

             mAudioSink = static_cast<MediaPlayerBase::AudioSink *>(obj.get());
             break;
         }

         case kWhatStart:
         {
             ALOGV("kWhatStart");

             mVideoIsAVC = false;
             mAudioEOS = false;
             mVideoEOS = false;
             mSkipRenderingAudioUntilMediaTimeUs = -1;
             mSkipRenderingVideoUntilMediaTimeUs = -1;
             mVideoLateByUs = 0;
             mNumFramesTotal = 0;
             mNumFramesDropped = 0;

             mSource->start();

             mRenderer = new Renderer(
                     mAudioSink,
                     new AMessage(kWhatRendererNotify, id()));

             looper()->registerHandler(mRenderer);

             postScanSources();
             break;
         }

         case kWhatScanSources:
         {
             int32_t generation;
             CHECK(msg->findInt32("generation", &generation));
             if (generation != mScanSourcesGeneration) {
                 // Drop obsolete msg.
                 break;
             }

             mScanSourcesPending = false;

             ALOGV("scanning sources haveAudio=%d, haveVideo=%d",
                  mAudioDecoder != NULL, mVideoDecoder != NULL);

             instantiateDecoder(false, &mVideoDecoder);

             if (mAudioSink != NULL) {
                 instantiateDecoder(true, &mAudioDecoder);
             }

             status_t err;
             if ((err = mSource->feedMoreTSData()) != OK) {
                 if (mAudioDecoder == NULL && mVideoDecoder == NULL) {
                     // We're not currently decoding anything (no audio or
                     // video tracks found) and we just ran out of input data.

                     if (err == ERROR_END_OF_STREAM) {
                         notifyListener(MEDIA_PLAYBACK_COMPLETE, 0, 0);
                     } else {
                         notifyListener(MEDIA_ERROR, MEDIA_ERROR_UNKNOWN, err);
                     }
                 }
                 break;
             }

             if (mAudioDecoder == NULL || mVideoDecoder == NULL) {
                 msg->post(100000ll);
                 mScanSourcesPending = true;
             }
             break;
         }

         case kWhatVideoNotify:
         case kWhatAudioNotify:
         {
             bool audio = msg->what() == kWhatAudioNotify;

             sp<AMessage> codecRequest;
             CHECK(msg->findMessage("codec-request", &codecRequest));

             int32_t what;
             CHECK(codecRequest->findInt32("what", &what));

             if (what == ACodec::kWhatFillThisBuffer) {
                 status_t err = feedDecoderInputData(
                         audio, codecRequest);

                 if (err == -EWOULDBLOCK) {
                     if (mSource->feedMoreTSData() == OK) {
                         msg->post(10000ll);
                     }
                 }
             } else if (what == ACodec::kWhatEOS) {
                 int32_t err;
                 CHECK(codecRequest->findInt32("err", &err));

                 if (err == ERROR_END_OF_STREAM) {
                     ALOGV("got %s decoder EOS", audio ? "audio" : "video");
                 } else {
                     ALOGV("got %s decoder EOS w/ error %d",
                          audio ? "audio" : "video",
                          err);
                 }

                 mRenderer->queueEOS(audio, err);
             } else if (what == ACodec::kWhatFlushCompleted) {
                 bool needShutdown;

                 if (audio) {
                     CHECK(IsFlushingState(mFlushingAudio, &needShutdown));
                     mFlushingAudio = FLUSHED;
                 } else {
                     CHECK(IsFlushingState(mFlushingVideo, &needShutdown));
                     mFlushingVideo = FLUSHED;

                     mVideoLateByUs = 0;
                 }

                 ALOGV("decoder %s flush completed", audio ? "audio" : "video");

                 if (needShutdown) {
                     ALOGV("initiating %s decoder shutdown",
                          audio ? "audio" : "video");

                     (audio ? mAudioDecoder : mVideoDecoder)->initiateShutdown();

                     if (audio) {
                         mFlushingAudio = SHUTTING_DOWN_DECODER;
                     } else {
                         mFlushingVideo = SHUTTING_DOWN_DECODER;
                     }
                 }

                 finishFlushIfPossible();
             } else if (what == ACodec::kWhatOutputFormatChanged) {
                 if (audio) {
                     int32_t numChannels;
                     CHECK(codecRequest->findInt32("channel-count", &numChannels));

                     int32_t sampleRate;
                     CHECK(codecRequest->findInt32("sample-rate", &sampleRate));

                     ALOGV("Audio output format changed to %d Hz, %d channels",
                          sampleRate, numChannels);

                     mAudioSink->close();
                     CHECK_EQ(mAudioSink->open(
                                 sampleRate,
                                 numChannels,
                                 CHANNEL_MASK_USE_CHANNEL_ORDER,
                                 AUDIO_FORMAT_PCM_16_BIT,
                                 8 /* bufferCount */),
                              (status_t)OK);
                     mAudioSink->start();

                     mRenderer->signalAudioSinkChanged();
                 } else {
                     // video

                     int32_t width, height;
                     CHECK(codecRequest->findInt32("width", &width));
                     CHECK(codecRequest->findInt32("height", &height));

                     int32_t cropLeft, cropTop, cropRight, cropBottom;
                     CHECK(codecRequest->findRect(
                                 "crop",
                                 &cropLeft, &cropTop, &cropRight, &cropBottom));

                     ALOGV("Video output format changed to %d x %d "
                          "(crop: %d x %d @ (%d, %d))",
                          width, height,
                          (cropRight - cropLeft + 1),
                          (cropBottom - cropTop + 1),
                          cropLeft, cropTop);

                     notifyListener(
                             MEDIA_SET_VIDEO_SIZE,
                             cropRight - cropLeft + 1,
                             cropBottom - cropTop + 1);
                 }
             } else if (what == ACodec::kWhatShutdownCompleted) {
                 ALOGV("%s shutdown completed", audio ? "audio" : "video");
                 if (audio) {
                     mAudioDecoder.clear();

                     CHECK_EQ((int)mFlushingAudio, (int)SHUTTING_DOWN_DECODER);
                     mFlushingAudio = SHUT_DOWN;
                 } else {
                     mVideoDecoder.clear();

                     CHECK_EQ((int)mFlushingVideo, (int)SHUTTING_DOWN_DECODER);
                     mFlushingVideo = SHUT_DOWN;
                 }

                 finishFlushIfPossible();
             } else if (what == ACodec::kWhatError) {
                 ALOGE("Received error from %s decoder, aborting playback.",
                      audio ? "audio" : "video");

                 mRenderer->queueEOS(audio, UNKNOWN_ERROR);
             } else if (what == ACodec::kWhatDrainThisBuffer) {
                 renderBuffer(audio, codecRequest);
             } else {
                 ALOGV("Unhandled codec notification %d.", what);
             }

             break;
         }

         case kWhatRendererNotify:
         {
             int32_t what;
             CHECK(msg->findInt32("what", &what));

             if (what == Renderer::kWhatEOS) {
                 int32_t audio;
                 CHECK(msg->findInt32("audio", &audio));

                 int32_t finalResult;
                 CHECK(msg->findInt32("finalResult", &finalResult));

                 if (audio) {
                     mAudioEOS = true;
                 } else {
                     mVideoEOS = true;
                 }

                 if (finalResult == ERROR_END_OF_STREAM) {
                     ALOGV("reached %s EOS", audio ? "audio" : "video");
                 } else {
                     ALOGE("%s track encountered an error (%d)",
                          audio ? "audio" : "video", finalResult);

                     notifyListener(
                             MEDIA_ERROR, MEDIA_ERROR_UNKNOWN, finalResult);
                 }

                 if ((mAudioEOS || mAudioDecoder == NULL)
                         && (mVideoEOS || mVideoDecoder == NULL)) {
                     notifyListener(MEDIA_PLAYBACK_COMPLETE, 0, 0);
                 }
             } else if (what == Renderer::kWhatPosition) {
                 int64_t positionUs;
                 CHECK(msg->findInt64("positionUs", &positionUs));

                 CHECK(msg->findInt64("videoLateByUs", &mVideoLateByUs));

                 if (mDriver != NULL) {
                     sp<NuPlayerDriver> driver = mDriver.promote();
                     if (driver != NULL) {
                         driver->notifyPosition(positionUs);

                         driver->notifyFrameStats(
                                 mNumFramesTotal, mNumFramesDropped);
                     }
                 }
             } else if (what == Renderer::kWhatFlushComplete) {
                 CHECK_EQ(what, (int32_t)Renderer::kWhatFlushComplete);

                 int32_t audio;
                 CHECK(msg->findInt32("audio", &audio));

                 ALOGV("renderer %s flush completed.", audio ? "audio" : "video");
             }
             break;
         }

         case kWhatMoreDataQueued:
         {
             break;
         }

         case kWhatReset:
         {
             ALOGV("kWhatReset");

             if (mRenderer != NULL) {
                 // There's an edge case where the renderer owns all output
                 // buffers and is paused, therefore the decoder will not read
                 // more input data and will never encounter the matching
                 // discontinuity. To avoid this, we resume the renderer.

                 if (mFlushingAudio == AWAITING_DISCONTINUITY
                         || mFlushingVideo == AWAITING_DISCONTINUITY) {
                     mRenderer->resume();
                 }
             }

             if (mFlushingAudio != NONE || mFlushingVideo != NONE) {
                 // We're currently flushing, postpone the reset until that's
                 // completed.

                 ALOGV("postponing reset mFlushingAudio=%d, mFlushingVideo=%d",
                       mFlushingAudio, mFlushingVideo);

                 mResetPostponed = true;
                 break;
             }

             if (mAudioDecoder == NULL && mVideoDecoder == NULL) {
                 finishReset();
                 break;
             }

             mTimeDiscontinuityPending = true;

             if (mAudioDecoder != NULL) {
                 flushDecoder(true /* audio */, true /* needShutdown */);
             }

             if (mVideoDecoder != NULL) {
                 flushDecoder(false /* audio */, true /* needShutdown */);
             }

             mResetInProgress = true;
             break;
         }

         case kWhatSeek:
         {
             int64_t seekTimeUs;
             CHECK(msg->findInt64("seekTimeUs", &seekTimeUs));

             ALOGV("kWhatSeek seekTimeUs=%lld us (%.2f secs)",
                  seekTimeUs, seekTimeUs / 1E6);

             mSource->seekTo(seekTimeUs);

             if (mDriver != NULL) {
                 sp<NuPlayerDriver> driver = mDriver.promote();
                 if (driver != NULL) {
                     driver->notifySeekComplete();
                 }
             }

             break;
         }

         case kWhatPause:
         {
             CHECK(mRenderer != NULL);
             mRenderer->pause();
             break;
         }

         case kWhatResume:
         {
             CHECK(mRenderer != NULL);
             mRenderer->resume();
             break;
         }

         default:
             TRESPASS();
             break;
     }
 }

 void NuPlayer::finishFlushIfPossible() {
     if (mFlushingAudio != FLUSHED && mFlushingAudio != SHUT_DOWN) {
         return;
     }

     if (mFlushingVideo != FLUSHED && mFlushingVideo != SHUT_DOWN) {
         return;
     }

     ALOGV("both audio and video are flushed now.");

     if (mTimeDiscontinuityPending) {
         mRenderer->signalTimeDiscontinuity();
         mTimeDiscontinuityPending = false;
     }

     if (mAudioDecoder != NULL) {
         mAudioDecoder->signalResume();
     }

     if (mVideoDecoder != NULL) {
         mVideoDecoder->signalResume();
     }

     mFlushingAudio = NONE;
     mFlushingVideo = NONE;

     if (mResetInProgress) {
         ALOGV("reset completed");

         mResetInProgress = false;
         finishReset();
     } else if (mResetPostponed) {
         (new AMessage(kWhatReset, id()))->post();
         mResetPostponed = false;
     } else if (mAudioDecoder == NULL || mVideoDecoder == NULL) {
         postScanSources();
     }
 }

 void NuPlayer::finishReset() {
     CHECK(mAudioDecoder == NULL);
     CHECK(mVideoDecoder == NULL);

     ++mScanSourcesGeneration;
     mScanSourcesPending = false;

     mRenderer.clear();

     if (mSource != NULL) {
         mSource->stop();
         mSource.clear();
     }

     if (mDriver != NULL) {
         sp<NuPlayerDriver> driver = mDriver.promote();
         if (driver != NULL) {
             driver->notifyResetComplete();
         }
     }
 }

 void NuPlayer::postScanSources() {
     if (mScanSourcesPending) {
         return;
     }

     sp<AMessage> msg = new AMessage(kWhatScanSources, id());
     msg->setInt32("generation", mScanSourcesGeneration);
     msg->post();

     mScanSourcesPending = true;
 }

 status_t NuPlayer::instantiateDecoder(bool audio, sp<Decoder> *decoder) {
     if (*decoder != NULL) {
         return OK;
     }

     sp<MetaData> meta = mSource->getFormat(audio);

     if (meta == NULL) {
         return -EWOULDBLOCK;
     }

     if (!audio) {
         const char *mime;
         CHECK(meta->findCString(kKeyMIMEType, &mime));
         mVideoIsAVC = !strcasecmp(MEDIA_MIMETYPE_VIDEO_AVC, mime);
     }

     sp<AMessage> notify =
         new AMessage(audio ? kWhatAudioNotify : kWhatVideoNotify,
                      id());

     *decoder = audio ? new Decoder(notify) :
                        new Decoder(notify, mNativeWindow);
     looper()->registerHandler(*decoder);

     (*decoder)->configure(meta);

     int64_t durationUs;
     if (mDriver != NULL && mSource->getDuration(&durationUs) == OK) {
         sp<NuPlayerDriver> driver = mDriver.promote();
         if (driver != NULL) {
             driver->notifyDuration(durationUs);
         }
     }

     return OK;
 }

 status_t NuPlayer::feedDecoderInputData(bool audio, const sp<AMessage> &msg) {
     sp<AMessage> reply;
     CHECK(msg->findMessage("reply", &reply));

     if ((audio && IsFlushingState(mFlushingAudio))
             || (!audio && IsFlushingState(mFlushingVideo))) {
         reply->setInt32("err", INFO_DISCONTINUITY);
         reply->post();
         return OK;
     }

     sp<ABuffer> accessUnit;

     bool dropAccessUnit;
     do {
         status_t err = mSource->dequeueAccessUnit(audio, &accessUnit);

         if (err == -EWOULDBLOCK) {
             return err;
         } else if (err != OK) {
             if (err == INFO_DISCONTINUITY) {
                 int32_t type;
                 CHECK(accessUnit->meta()->findInt32("discontinuity", &type));

                 bool formatChange =
                     (audio &&
                      (type & ATSParser::DISCONTINUITY_AUDIO_FORMAT))
                     || (!audio &&
                             (type & ATSParser::DISCONTINUITY_VIDEO_FORMAT));

                 bool timeChange = (type & ATSParser::DISCONTINUITY_TIME) != 0;

                 ALOGI("%s discontinuity (formatChange=%d, time=%d)",
                      audio ? "audio" : "video", formatChange, timeChange);

                 if (audio) {
                     mSkipRenderingAudioUntilMediaTimeUs = -1;
                 } else {
                     mSkipRenderingVideoUntilMediaTimeUs = -1;
                 }

                 if (timeChange) {
                     sp<AMessage> extra;
                     if (accessUnit->meta()->findMessage("extra", &extra)
                             && extra != NULL) {
                         int64_t resumeAtMediaTimeUs;
                         if (extra->findInt64(
                                     "resume-at-mediatimeUs", &resumeAtMediaTimeUs)) {
                             ALOGI("suppressing rendering of %s until %lld us",
                                     audio ? "audio" : "video", resumeAtMediaTimeUs);

                             if (audio) {
                                 mSkipRenderingAudioUntilMediaTimeUs =
                                     resumeAtMediaTimeUs;
                             } else {
                                 mSkipRenderingVideoUntilMediaTimeUs =
                                     resumeAtMediaTimeUs;
                             }
                         }
                     }
                 }

                 mTimeDiscontinuityPending =
                     mTimeDiscontinuityPending || timeChange;

                 if (formatChange || timeChange) {
                     flushDecoder(audio, formatChange);
                 } else {
                     // This stream is unaffected by the discontinuity

                     if (audio) {
                         mFlushingAudio = FLUSHED;
                     } else {
                         mFlushingVideo = FLUSHED;
                     }

                     finishFlushIfPossible();

                     return -EWOULDBLOCK;
                 }
             }

             reply->setInt32("err", err);
             reply->post();
             return OK;
         }

         if (!audio) {
             ++mNumFramesTotal;
         }

         dropAccessUnit = false;
         if (!audio
                 && mVideoLateByUs > 100000ll
                 && mVideoIsAVC
                 && !IsAVCReferenceFrame(accessUnit)) {
             dropAccessUnit = true;
             ++mNumFramesDropped;
         }
     } while (dropAccessUnit);

     // ALOGV("returned a valid buffer of %s data", audio ? "audio" : "video");

 #if 0
     int64_t mediaTimeUs;
     CHECK(accessUnit->meta()->findInt64("timeUs", &mediaTimeUs));
     ALOGV("feeding %s input buffer at media time %.2f secs",
          audio ? "audio" : "video",
          mediaTimeUs / 1E6);
 #endif

     reply->setBuffer("buffer", accessUnit);
     reply->post();

     return OK;
 }

 void NuPlayer::renderBuffer(bool audio, const sp<AMessage> &msg) {
     // ALOGV("renderBuffer %s", audio ? "audio" : "video");

     sp<AMessage> reply;
     CHECK(msg->findMessage("reply", &reply));

     if (IsFlushingState(audio ? mFlushingAudio : mFlushingVideo)) {
         // We're currently attempting to flush the decoder, in order
         // to complete this, the decoder wants all its buffers back,
         // so we don't want any output buffers it sent us (from before
         // we initiated the flush) to be stuck in the renderer's queue.

         ALOGV("we're still flushing the %s decoder, sending its output buffer"
              " right back.", audio ? "audio" : "video");

         reply->post();
         return;
     }

     sp<ABuffer> buffer;
     CHECK(msg->findBuffer("buffer", &buffer));

     int64_t &skipUntilMediaTimeUs =
         audio
             ? mSkipRenderingAudioUntilMediaTimeUs
             : mSkipRenderingVideoUntilMediaTimeUs;

     if (skipUntilMediaTimeUs >= 0) {
         int64_t mediaTimeUs;
         CHECK(buffer->meta()->findInt64("timeUs", &mediaTimeUs));

         if (mediaTimeUs < skipUntilMediaTimeUs) {
             ALOGV("dropping %s buffer at time %lld as requested.",
                  audio ? "audio" : "video",
                  mediaTimeUs);

             reply->post();
             return;
         }

         skipUntilMediaTimeUs = -1;
     }

     mRenderer->queueBuffer(audio, buffer, reply);
 }

 void NuPlayer::notifyListener(int msg, int ext1, int ext2) {
     if (mDriver == NULL) {
         return;
     }

     sp<NuPlayerDriver> driver = mDriver.promote();

     if (driver == NULL) {
         return;
     }

     driver->notifyListener(msg, ext1, ext2);
 }

 void NuPlayer::flushDecoder(bool audio, bool needShutdown) {
     if ((audio && mAudioDecoder == NULL) || (!audio && mVideoDecoder == NULL)) {
         ALOGI("flushDecoder %s without decoder present",
              audio ? "audio" : "video");
     }

     // Make sure we don't continue to scan sources until we finish flushing.
     ++mScanSourcesGeneration;
     mScanSourcesPending = false;

     (audio ? mAudioDecoder : mVideoDecoder)->signalFlush();
     mRenderer->flush(audio);

     FlushStatus newStatus =
         needShutdown ? FLUSHING_DECODER_SHUTDOWN : FLUSHING_DECODER;

     if (audio) {
         CHECK(mFlushingAudio == NONE
                 || mFlushingAudio == AWAITING_DISCONTINUITY);

         mFlushingAudio = newStatus;

         if (mFlushingVideo == NONE) {
             mFlushingVideo = (mVideoDecoder != NULL)
                 ? AWAITING_DISCONTINUITY
                 : FLUSHED;
         }
     } else {
         CHECK(mFlushingVideo == NONE
                 || mFlushingVideo == AWAITING_DISCONTINUITY);

         mFlushingVideo = newStatus;

         if (mFlushingAudio == NONE) {
             mFlushingAudio = (mAudioDecoder != NULL)
                 ? AWAITING_DISCONTINUITY
                 : FLUSHED;
         }
     }
 }

 }  // namespace android
	/*
	* Copyright (C) 2010 The Android Open Source Project
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
	*/

	//#define LOG_NDEBUG 0
	#define LOG_TAG "NuPlayer"
	#include <utils/Log.h>

	#include "NuPlayer.h"

	#include "HTTPLiveSource.h"
	#include "NuPlayerDecoder.h"
	#include "NuPlayerDriver.h"
	#include "NuPlayerRenderer.h"
	#include "NuPlayerSource.h"
	#include "RTSPSource.h"
	#include "StreamingSource.h"

	#include "ATSParser.h"

	#include <media/stagefright/foundation/hexdump.h>
	#include <media/stagefright/foundation/ABuffer.h>
	#include <media/stagefright/foundation/ADebug.h>
	#include <media/stagefright/foundation/AMessage.h>
	#include <media/stagefright/ACodec.h>
	#include <media/stagefright/MediaDefs.h>
	#include <media/stagefright/MediaErrors.h>
	#include <media/stagefright/MetaData.h>
	#include <gui/ISurfaceTexture.h>

	#include "avc_utils.h"

	namespace android {

	////////////////////////////////////////////////////////////////////////////////

	NuPlayer::NuPlayer()
	: mUIDValid(false),
	mVideoIsAVC(false),
	mAudioEOS(false),
	mVideoEOS(false),
	mScanSourcesPending(false),
	mScanSourcesGeneration(0),
	mTimeDiscontinuityPending(false),
	mFlushingAudio(NONE),
	mFlushingVideo(NONE),
	mResetInProgress(false),
	mResetPostponed(false),
	mSkipRenderingAudioUntilMediaTimeUs(-1ll),
	mSkipRenderingVideoUntilMediaTimeUs(-1ll),
	mVideoLateByUs(0ll),
	mNumFramesTotal(0ll),
	mNumFramesDropped(0ll) {
	}

	NuPlayer::~NuPlayer() {
	}

	void NuPlayer::setUID(uid_t uid) {
	mUIDValid = true;
	mUID = uid;
	}

	void NuPlayer::setDriver(const wp<NuPlayerDriver> &driver) {
	mDriver = driver;
	}

	void NuPlayer::setDataSource(const sp<IStreamSource> &source) {
	sp<AMessage> msg = new AMessage(kWhatSetDataSource, id());

	msg->setObject("source", new StreamingSource(source));
	msg->post();
	}

	void NuPlayer::setDataSource(
	const char url, const KeyedVector<String8, String8> headers) {
	sp<AMessage> msg = new AMessage(kWhatSetDataSource, id());

	if (!strncasecmp(url, "rtsp://", 7)) {
	msg->setObject(
	"source", new RTSPSource(url, headers, mUIDValid, mUID));
	} else {
	msg->setObject(
	"source", new HTTPLiveSource(url, headers, mUIDValid, mUID));
	}

	msg->post();
	}

	void NuPlayer::setVideoSurfaceTexture(const sp<ISurfaceTexture> &surfaceTexture) {
	sp<AMessage> msg = new AMessage(kWhatSetVideoNativeWindow, id());
	sp<SurfaceTextureClient> surfaceTextureClient(surfaceTexture != NULL ?
	new SurfaceTextureClient(surfaceTexture) : NULL);
	msg->setObject("native-window", new NativeWindowWrapper(surfaceTextureClient));
	msg->post();
	}

	void NuPlayer::setAudioSink(const sp<MediaPlayerBase::AudioSink> &sink) {
	sp<AMessage> msg = new AMessage(kWhatSetAudioSink, id());
	msg->setObject("sink", sink);
	msg->post();
	}

	void NuPlayer::start() {
	(new AMessage(kWhatStart, id()))->post();
	}

	void NuPlayer::pause() {
	(new AMessage(kWhatPause, id()))->post();
	}

	void NuPlayer::resume() {
	(new AMessage(kWhatResume, id()))->post();
	}

	void NuPlayer::resetAsync() {
	(new AMessage(kWhatReset, id()))->post();
	}

	void NuPlayer::seekToAsync(int64_t seekTimeUs) {
	sp<AMessage> msg = new AMessage(kWhatSeek, id());
	msg->setInt64("seekTimeUs", seekTimeUs);
	msg->post();
	}

	// static
	bool NuPlayer::IsFlushingState(FlushStatus state, bool *needShutdown) {
	switch (state) {
	case FLUSHING_DECODER:
	if (needShutdown != NULL) {
	*needShutdown = false;
	}
	return true;

	case FLUSHING_DECODER_SHUTDOWN:
	if (needShutdown != NULL) {
	*needShutdown = true;
	}
	return true;

	default:
	return false;
	}
	}

	void NuPlayer::onMessageReceived(const sp<AMessage> &msg) {
	switch (msg->what()) {
	case kWhatSetDataSource:
	{
	ALOGV("kWhatSetDataSource");

	CHECK(mSource == NULL);

	sp<RefBase> obj;
	CHECK(msg->findObject("source", &obj));

	mSource = static_cast<Source *>(obj.get());
	break;
	}

	case kWhatSetVideoNativeWindow:
	{
	ALOGV("kWhatSetVideoNativeWindow");

	sp<RefBase> obj;
	CHECK(msg->findObject("native-window", &obj));

	mNativeWindow = static_cast<NativeWindowWrapper *>(obj.get());
	break;
	}

	case kWhatSetAudioSink:
	{
	ALOGV("kWhatSetAudioSink");

	sp<RefBase> obj;
	CHECK(msg->findObject("sink", &obj));

	mAudioSink = static_cast<MediaPlayerBase::AudioSink *>(obj.get());
	break;
	}

	case kWhatStart:
	{
	ALOGV("kWhatStart");

	mVideoIsAVC = false;
	mAudioEOS = false;
	mVideoEOS = false;
	mSkipRenderingAudioUntilMediaTimeUs = -1;
	mSkipRenderingVideoUntilMediaTimeUs = -1;
	mVideoLateByUs = 0;
	mNumFramesTotal = 0;
	mNumFramesDropped = 0;

	mSource->start();

	mRenderer = new Renderer(
	mAudioSink,
	new AMessage(kWhatRendererNotify, id()));

	looper()->registerHandler(mRenderer);

	postScanSources();
	break;
	}

	case kWhatScanSources:
	{
	int32_t generation;
	CHECK(msg->findInt32("generation", &generation));
	if (generation != mScanSourcesGeneration) {
	// Drop obsolete msg.
	break;
	}

	mScanSourcesPending = false;

	ALOGV("scanning sources haveAudio=%d, haveVideo=%d",
	mAudioDecoder != NULL, mVideoDecoder != NULL);

	instantiateDecoder(false, &mVideoDecoder);

	if (mAudioSink != NULL) {
	instantiateDecoder(true, &mAudioDecoder);
	}

	status_t err;
	if ((err = mSource->feedMoreTSData()) != OK) {
	if (mAudioDecoder == NULL && mVideoDecoder == NULL) {
	// We're not currently decoding anything (no audio or
	// video tracks found) and we just ran out of input data.

	if (err == ERROR_END_OF_STREAM) {
	notifyListener(MEDIA_PLAYBACK_COMPLETE, 0, 0);
	} else {
	notifyListener(MEDIA_ERROR, MEDIA_ERROR_UNKNOWN, err);
	}
	}
	break;
	}

	if (mAudioDecoder == NULL \|\| mVideoDecoder == NULL) {
	msg->post(100000ll);
	mScanSourcesPending = true;
	}
	break;
	}

	case kWhatVideoNotify:
	case kWhatAudioNotify:
	{
	bool audio = msg->what() == kWhatAudioNotify;

	sp<AMessage> codecRequest;
	CHECK(msg->findMessage("codec-request", &codecRequest));

	int32_t what;
	CHECK(codecRequest->findInt32("what", &what));

	if (what == ACodec::kWhatFillThisBuffer) {
	status_t err = feedDecoderInputData(
	audio, codecRequest);

	if (err == -EWOULDBLOCK) {
	if (mSource->feedMoreTSData() == OK) {
	msg->post(10000ll);
	}
	}
	} else if (what == ACodec::kWhatEOS) {
	int32_t err;
	CHECK(codecRequest->findInt32("err", &err));

	if (err == ERROR_END_OF_STREAM) {
	ALOGV("got %s decoder EOS", audio ? "audio" : "video");
	} else {
	ALOGV("got %s decoder EOS w/ error %d",
	audio ? "audio" : "video",
	err);
	}

	mRenderer->queueEOS(audio, err);
	} else if (what == ACodec::kWhatFlushCompleted) {
	bool needShutdown;

	if (audio) {
	CHECK(IsFlushingState(mFlushingAudio, &needShutdown));
	mFlushingAudio = FLUSHED;
	} else {
	CHECK(IsFlushingState(mFlushingVideo, &needShutdown));
	mFlushingVideo = FLUSHED;

	mVideoLateByUs = 0;
	}

	ALOGV("decoder %s flush completed", audio ? "audio" : "video");

	if (needShutdown) {
	ALOGV("initiating %s decoder shutdown",
	audio ? "audio" : "video");

	(audio ? mAudioDecoder : mVideoDecoder)->initiateShutdown();

	if (audio) {
	mFlushingAudio = SHUTTING_DOWN_DECODER;
	} else {
	mFlushingVideo = SHUTTING_DOWN_DECODER;
	}
	}

	finishFlushIfPossible();
	} else if (what == ACodec::kWhatOutputFormatChanged) {
	if (audio) {
	int32_t numChannels;
	CHECK(codecRequest->findInt32("channel-count", &numChannels));

	int32_t sampleRate;
	CHECK(codecRequest->findInt32("sample-rate", &sampleRate));

	ALOGV("Audio output format changed to %d Hz, %d channels",
	sampleRate, numChannels);

	mAudioSink->close();
	CHECK_EQ(mAudioSink->open(
	sampleRate,
	numChannels,
	CHANNEL_MASK_USE_CHANNEL_ORDER,
	AUDIO_FORMAT_PCM_16_BIT,
	8 /* bufferCount */),
	(status_t)OK);
	mAudioSink->start();

	mRenderer->signalAudioSinkChanged();
	} else {
	// video

	int32_t width, height;
	CHECK(codecRequest->findInt32("width", &width));
	CHECK(codecRequest->findInt32("height", &height));

	int32_t cropLeft, cropTop, cropRight, cropBottom;
	CHECK(codecRequest->findRect(
	"crop",
	&cropLeft, &cropTop, &cropRight, &cropBottom));

	ALOGV("Video output format changed to %d x %d "
	"(crop: %d x %d @ (%d, %d))",
	width, height,
	(cropRight - cropLeft + 1),
	(cropBottom - cropTop + 1),
	cropLeft, cropTop);

	notifyListener(
	MEDIA_SET_VIDEO_SIZE,
	cropRight - cropLeft + 1,
	cropBottom - cropTop + 1);
	}
	} else if (what == ACodec::kWhatShutdownCompleted) {
	ALOGV("%s shutdown completed", audio ? "audio" : "video");
	if (audio) {
	mAudioDecoder.clear();

	CHECK_EQ((int)mFlushingAudio, (int)SHUTTING_DOWN_DECODER);
	mFlushingAudio = SHUT_DOWN;
	} else {
	mVideoDecoder.clear();

	CHECK_EQ((int)mFlushingVideo, (int)SHUTTING_DOWN_DECODER);
	mFlushingVideo = SHUT_DOWN;
	}

	finishFlushIfPossible();
	} else if (what == ACodec::kWhatError) {
	ALOGE("Received error from %s decoder, aborting playback.",
	audio ? "audio" : "video");

	mRenderer->queueEOS(audio, UNKNOWN_ERROR);
	} else if (what == ACodec::kWhatDrainThisBuffer) {
	renderBuffer(audio, codecRequest);
	} else {
	ALOGV("Unhandled codec notification %d.", what);
	}

	break;
	}

	case kWhatRendererNotify:
	{
	int32_t what;
	CHECK(msg->findInt32("what", &what));

	if (what == Renderer::kWhatEOS) {
	int32_t audio;
	CHECK(msg->findInt32("audio", &audio));

	int32_t finalResult;
	CHECK(msg->findInt32("finalResult", &finalResult));

	if (audio) {
	mAudioEOS = true;
	} else {
	mVideoEOS = true;
	}

	if (finalResult == ERROR_END_OF_STREAM) {
	ALOGV("reached %s EOS", audio ? "audio" : "video");
	} else {
	ALOGE("%s track encountered an error (%d)",
	audio ? "audio" : "video", finalResult);

	notifyListener(
	MEDIA_ERROR, MEDIA_ERROR_UNKNOWN, finalResult);
	}

	if ((mAudioEOS \|\| mAudioDecoder == NULL)
	&& (mVideoEOS \|\| mVideoDecoder == NULL)) {
	notifyListener(MEDIA_PLAYBACK_COMPLETE, 0, 0);
	}
	} else if (what == Renderer::kWhatPosition) {
	int64_t positionUs;
	CHECK(msg->findInt64("positionUs", &positionUs));

	CHECK(msg->findInt64("videoLateByUs", &mVideoLateByUs));

	if (mDriver != NULL) {
	sp<NuPlayerDriver> driver = mDriver.promote();
	if (driver != NULL) {
	driver->notifyPosition(positionUs);

	driver->notifyFrameStats(
	mNumFramesTotal, mNumFramesDropped);
	}
	}
	} else if (what == Renderer::kWhatFlushComplete) {
	CHECK_EQ(what, (int32_t)Renderer::kWhatFlushComplete);

	int32_t audio;
	CHECK(msg->findInt32("audio", &audio));

	ALOGV("renderer %s flush completed.", audio ? "audio" : "video");
	}
	break;
	}

	case kWhatMoreDataQueued:
	{
	break;
	}

	case kWhatReset:
	{
	ALOGV("kWhatReset");

	if (mRenderer != NULL) {
	// There's an edge case where the renderer owns all output
	// buffers and is paused, therefore the decoder will not read
	// more input data and will never encounter the matching
	// discontinuity. To avoid this, we resume the renderer.

	if (mFlushingAudio == AWAITING_DISCONTINUITY
	\|\| mFlushingVideo == AWAITING_DISCONTINUITY) {
	mRenderer->resume();
	}
	}

	if (mFlushingAudio != NONE \|\| mFlushingVideo != NONE) {
	// We're currently flushing, postpone the reset until that's
	// completed.

	ALOGV("postponing reset mFlushingAudio=%d, mFlushingVideo=%d",
	mFlushingAudio, mFlushingVideo);

	mResetPostponed = true;
	break;
	}

	if (mAudioDecoder == NULL && mVideoDecoder == NULL) {
	finishReset();
	break;
	}

	mTimeDiscontinuityPending = true;

	if (mAudioDecoder != NULL) {
	flushDecoder(true /* audio /, true / needShutdown */);
	}

	if (mVideoDecoder != NULL) {
	flushDecoder(false /* audio /, true / needShutdown */);
	}

	mResetInProgress = true;
	break;
	}

	case kWhatSeek:
	{
	int64_t seekTimeUs;
	CHECK(msg->findInt64("seekTimeUs", &seekTimeUs));

	ALOGV("kWhatSeek seekTimeUs=%lld us (%.2f secs)",
	seekTimeUs, seekTimeUs / 1E6);

	mSource->seekTo(seekTimeUs);

	if (mDriver != NULL) {
	sp<NuPlayerDriver> driver = mDriver.promote();
	if (driver != NULL) {
	driver->notifySeekComplete();
	}
	}

	break;
	}

	case kWhatPause:
	{
	CHECK(mRenderer != NULL);
	mRenderer->pause();
	break;
	}

	case kWhatResume:
	{
	CHECK(mRenderer != NULL);
	mRenderer->resume();
	break;
	}

	default:
	TRESPASS();
	break;
	}
	}

	void NuPlayer::finishFlushIfPossible() {
	if (mFlushingAudio != FLUSHED && mFlushingAudio != SHUT_DOWN) {
	return;
	}

	if (mFlushingVideo != FLUSHED && mFlushingVideo != SHUT_DOWN) {
	return;
	}

	ALOGV("both audio and video are flushed now.");

	if (mTimeDiscontinuityPending) {
	mRenderer->signalTimeDiscontinuity();
	mTimeDiscontinuityPending = false;
	}

	if (mAudioDecoder != NULL) {
	mAudioDecoder->signalResume();
	}

	if (mVideoDecoder != NULL) {
	mVideoDecoder->signalResume();
	}

	mFlushingAudio = NONE;
	mFlushingVideo = NONE;

	if (mResetInProgress) {
	ALOGV("reset completed");

	mResetInProgress = false;
	finishReset();
	} else if (mResetPostponed) {
	(new AMessage(kWhatReset, id()))->post();
	mResetPostponed = false;
	} else if (mAudioDecoder == NULL \|\| mVideoDecoder == NULL) {
	postScanSources();
	}
	}

	void NuPlayer::finishReset() {
	CHECK(mAudioDecoder == NULL);
	CHECK(mVideoDecoder == NULL);

	++mScanSourcesGeneration;
	mScanSourcesPending = false;

	mRenderer.clear();

	if (mSource != NULL) {
	mSource->stop();
	mSource.clear();
	}

	if (mDriver != NULL) {
	sp<NuPlayerDriver> driver = mDriver.promote();
	if (driver != NULL) {
	driver->notifyResetComplete();
	}
	}
	}

	void NuPlayer::postScanSources() {
	if (mScanSourcesPending) {
	return;
	}

	sp<AMessage> msg = new AMessage(kWhatScanSources, id());
	msg->setInt32("generation", mScanSourcesGeneration);
	msg->post();

	mScanSourcesPending = true;
	}

	status_t NuPlayer::instantiateDecoder(bool audio, sp<Decoder> *decoder) {
	if (*decoder != NULL) {
	return OK;
	}

	sp<MetaData> meta = mSource->getFormat(audio);

	if (meta == NULL) {
	return -EWOULDBLOCK;
	}

	if (!audio) {
	const char *mime;
	CHECK(meta->findCString(kKeyMIMEType, &mime));
	mVideoIsAVC = !strcasecmp(MEDIA_MIMETYPE_VIDEO_AVC, mime);
	}

	sp<AMessage> notify =
	new AMessage(audio ? kWhatAudioNotify : kWhatVideoNotify,
	id());

	*decoder = audio ? new Decoder(notify) :
	new Decoder(notify, mNativeWindow);
	looper()->registerHandler(*decoder);

	(*decoder)->configure(meta);

	int64_t durationUs;
	if (mDriver != NULL && mSource->getDuration(&durationUs) == OK) {
	sp<NuPlayerDriver> driver = mDriver.promote();
	if (driver != NULL) {
	driver->notifyDuration(durationUs);
	}
	}

	return OK;
	}

	status_t NuPlayer::feedDecoderInputData(bool audio, const sp<AMessage> &msg) {
	sp<AMessage> reply;
	CHECK(msg->findMessage("reply", &reply));

	if ((audio && IsFlushingState(mFlushingAudio))
	\|\| (!audio && IsFlushingState(mFlushingVideo))) {
	reply->setInt32("err", INFO_DISCONTINUITY);
	reply->post();
	return OK;
	}

	sp<ABuffer> accessUnit;

	bool dropAccessUnit;
	do {
	status_t err = mSource->dequeueAccessUnit(audio, &accessUnit);

	if (err == -EWOULDBLOCK) {
	return err;
	} else if (err != OK) {
	if (err == INFO_DISCONTINUITY) {
	int32_t type;
	CHECK(accessUnit->meta()->findInt32("discontinuity", &type));

	bool formatChange =
	(audio &&
	(type & ATSParser::DISCONTINUITY_AUDIO_FORMAT))
	\|\| (!audio &&
	(type & ATSParser::DISCONTINUITY_VIDEO_FORMAT));

	bool timeChange = (type & ATSParser::DISCONTINUITY_TIME) != 0;

	ALOGI("%s discontinuity (formatChange=%d, time=%d)",
	audio ? "audio" : "video", formatChange, timeChange);

	if (audio) {
	mSkipRenderingAudioUntilMediaTimeUs = -1;
	} else {
	mSkipRenderingVideoUntilMediaTimeUs = -1;
	}

	if (timeChange) {
	sp<AMessage> extra;
	if (accessUnit->meta()->findMessage("extra", &extra)
	&& extra != NULL) {
	int64_t resumeAtMediaTimeUs;
	if (extra->findInt64(
	"resume-at-mediatimeUs", &resumeAtMediaTimeUs)) {
	ALOGI("suppressing rendering of %s until %lld us",
	audio ? "audio" : "video", resumeAtMediaTimeUs);

	if (audio) {
	mSkipRenderingAudioUntilMediaTimeUs =
	resumeAtMediaTimeUs;
	} else {
	mSkipRenderingVideoUntilMediaTimeUs =
	resumeAtMediaTimeUs;
	}
	}
	}
	}

	mTimeDiscontinuityPending =
	mTimeDiscontinuityPending \|\| timeChange;

	if (formatChange \|\| timeChange) {
	flushDecoder(audio, formatChange);
	} else {
	// This stream is unaffected by the discontinuity

	if (audio) {
	mFlushingAudio = FLUSHED;
	} else {
	mFlushingVideo = FLUSHED;
	}

	finishFlushIfPossible();

	return -EWOULDBLOCK;
	}
	}

	reply->setInt32("err", err);
	reply->post();
	return OK;
	}

	if (!audio) {
	++mNumFramesTotal;
	}

	dropAccessUnit = false;
	if (!audio
	&& mVideoLateByUs > 100000ll
	&& mVideoIsAVC
	&& !IsAVCReferenceFrame(accessUnit)) {
	dropAccessUnit = true;
	++mNumFramesDropped;
	}
	} while (dropAccessUnit);

	// ALOGV("returned a valid buffer of %s data", audio ? "audio" : "video");

	#if 0
	int64_t mediaTimeUs;
	CHECK(accessUnit->meta()->findInt64("timeUs", &mediaTimeUs));
	ALOGV("feeding %s input buffer at media time %.2f secs",
	audio ? "audio" : "video",
	mediaTimeUs / 1E6);
	#endif

	reply->setBuffer("buffer", accessUnit);
	reply->post();

	return OK;
	}

	void NuPlayer::renderBuffer(bool audio, const sp<AMessage> &msg) {
	// ALOGV("renderBuffer %s", audio ? "audio" : "video");

	sp<AMessage> reply;
	CHECK(msg->findMessage("reply", &reply));

	if (IsFlushingState(audio ? mFlushingAudio : mFlushingVideo)) {
	// We're currently attempting to flush the decoder, in order
	// to complete this, the decoder wants all its buffers back,
	// so we don't want any output buffers it sent us (from before
	// we initiated the flush) to be stuck in the renderer's queue.

	ALOGV("we're still flushing the %s decoder, sending its output buffer"
	" right back.", audio ? "audio" : "video");

	reply->post();
	return;
	}

	sp<ABuffer> buffer;
	CHECK(msg->findBuffer("buffer", &buffer));

	int64_t &skipUntilMediaTimeUs =
	audio
	? mSkipRenderingAudioUntilMediaTimeUs
	: mSkipRenderingVideoUntilMediaTimeUs;

	if (skipUntilMediaTimeUs >= 0) {
	int64_t mediaTimeUs;
	CHECK(buffer->meta()->findInt64("timeUs", &mediaTimeUs));

	if (mediaTimeUs < skipUntilMediaTimeUs) {
	ALOGV("dropping %s buffer at time %lld as requested.",
	audio ? "audio" : "video",
	mediaTimeUs);

	reply->post();
	return;
	}

	skipUntilMediaTimeUs = -1;
	}

	mRenderer->queueBuffer(audio, buffer, reply);
	}

	void NuPlayer::notifyListener(int msg, int ext1, int ext2) {
	if (mDriver == NULL) {
	return;
	}

	sp<NuPlayerDriver> driver = mDriver.promote();

	if (driver == NULL) {
	return;
	}

	driver->notifyListener(msg, ext1, ext2);
	}

	void NuPlayer::flushDecoder(bool audio, bool needShutdown) {
	if ((audio && mAudioDecoder == NULL) \|\| (!audio && mVideoDecoder == NULL)) {
	ALOGI("flushDecoder %s without decoder present",
	audio ? "audio" : "video");
	}

	// Make sure we don't continue to scan sources until we finish flushing.
	++mScanSourcesGeneration;
	mScanSourcesPending = false;

	(audio ? mAudioDecoder : mVideoDecoder)->signalFlush();
	mRenderer->flush(audio);

	FlushStatus newStatus =
	needShutdown ? FLUSHING_DECODER_SHUTDOWN : FLUSHING_DECODER;

	if (audio) {
	CHECK(mFlushingAudio == NONE
	\|\| mFlushingAudio == AWAITING_DISCONTINUITY);

	mFlushingAudio = newStatus;

	if (mFlushingVideo == NONE) {
	mFlushingVideo = (mVideoDecoder != NULL)
	? AWAITING_DISCONTINUITY
	: FLUSHED;
	}
	} else {
	CHECK(mFlushingVideo == NONE
	\|\| mFlushingVideo == AWAITING_DISCONTINUITY);

	mFlushingVideo = newStatus;

	if (mFlushingAudio == NONE) {
	mFlushingAudio = (mAudioDecoder != NULL)
	? AWAITING_DISCONTINUITY
	: FLUSHED;
	}
	}
	}

	} // namespace android