C++ VideoFrameContainer::SetCurrentFrame方法代码示例

void
CameraPreviewMediaStream::SetCurrentFrame(const gfx::IntSize& aIntrinsicSize, Image* aImage)
{
    {
        MutexAutoLock lock(mMutex);

        if (mInvalidatePending > 0) {
            if (mRateLimit || mInvalidatePending > MAX_INVALIDATE_PENDING) {
                ++mDiscardedFrames;
                DOM_CAMERA_LOGW("Discard preview frame %d, %d invalidation(s) pending",
                                mDiscardedFrames, mInvalidatePending);
                return;
            }

            DOM_CAMERA_LOGI("Update preview frame, %d invalidation(s) pending",
                            mInvalidatePending);
        }
        mDiscardedFrames = 0;

        TimeStamp now = TimeStamp::Now();
        for (nsTArray<RefPtr<VideoFrameContainer> >::size_type i = 0; i < mVideoOutputs.Length(); ++i) {
            VideoFrameContainer* output = mVideoOutputs[i];
            output->SetCurrentFrame(aIntrinsicSize, aImage, now);
        }

        ++mInvalidatePending;
    }

    NS_DispatchToMainThread(NewRunnableMethod(this, &CameraPreviewMediaStream::Invalidate));
}

nsresult AndroidMediaReader::ReadMetadata(MediaInfo* aInfo,
                                          MetadataTags** aTags)
{
  MOZ_ASSERT(OnTaskQueue());

  if (!mPlugin) {
    mPlugin = GetAndroidMediaPluginHost()->CreateDecoder(mDecoder->GetResource(), mType);
    if (!mPlugin) {
      return NS_ERROR_FAILURE;
    }
  }

  // Set the total duration (the max of the audio and video track).
  int64_t durationUs;
  mPlugin->GetDuration(mPlugin, &durationUs);
  if (durationUs) {
    ReentrantMonitorAutoEnter mon(mDecoder->GetReentrantMonitor());
    mDecoder->SetMediaDuration(durationUs);
  }

  if (mPlugin->HasVideo(mPlugin)) {
    int32_t width, height;
    mPlugin->GetVideoParameters(mPlugin, &width, &height);
    nsIntRect pictureRect(0, 0, width, height);

    // Validate the container-reported frame and pictureRect sizes. This ensures
    // that our video frame creation code doesn't overflow.
    nsIntSize displaySize(width, height);
    nsIntSize frameSize(width, height);
    if (!IsValidVideoRegion(frameSize, pictureRect, displaySize)) {
      return NS_ERROR_FAILURE;
    }

    // Video track's frame sizes will not overflow. Activate the video track.
    mHasVideo = mInfo.mVideo.mHasVideo = true;
    mInfo.mVideo.mDisplay = displaySize;
    mPicture = pictureRect;
    mInitialFrame = frameSize;
    VideoFrameContainer* container = mDecoder->GetVideoFrameContainer();
    if (container) {
      container->SetCurrentFrame(gfxIntSize(displaySize.width, displaySize.height),
                                 nullptr,
                                 mozilla::TimeStamp::Now());
    }
  }

  if (mPlugin->HasAudio(mPlugin)) {
    int32_t numChannels, sampleRate;
    mPlugin->GetAudioParameters(mPlugin, &numChannels, &sampleRate);
    mHasAudio = mInfo.mAudio.mHasAudio = true;
    mInfo.mAudio.mChannels = numChannels;
    mInfo.mAudio.mRate = sampleRate;
  }

 *aInfo = mInfo;
 *aTags = nullptr;
  return NS_OK;
}

void
CameraPreviewMediaStream::SetCurrentFrame(const gfxIntSize& aIntrinsicSize, Image* aImage)
{
  MutexAutoLock lock(mMutex);

  TimeStamp now = TimeStamp::Now();
  for (uint32_t i = 0; i < mVideoOutputs.Length(); ++i) {
    VideoFrameContainer* output = mVideoOutputs[i];
    output->SetCurrentFrame(aIntrinsicSize, aImage, now);
    nsCOMPtr<nsIRunnable> event =
      NS_NewRunnableMethod(output, &VideoFrameContainer::Invalidate);
    NS_DispatchToMainThread(event, NS_DISPATCH_NORMAL);
  }
}

nsresult MediaOmxReader::ReadMetadata(MediaInfo* aInfo,
                                      MetadataTags** aTags)
{
  NS_ASSERTION(mDecoder->OnDecodeThread(), "Should be on decode thread.");
  EnsureActive();

  *aTags = nullptr;

  // Initialize the internal OMX Decoder.
  nsresult rv = InitOmxDecoder();
  if (NS_FAILED(rv)) {
    return rv;
  }

  bool isMP3 = mDecoder->GetResource()->GetContentType().EqualsASCII(AUDIO_MP3);
  if (isMP3) {
    // When read sdcard's file on b2g platform at constructor,
    // the mDecoder->GetResource()->GetLength() would return -1.
    // Delay set the total duration on this function.
    mMP3FrameParser.SetLength(mDecoder->GetResource()->GetLength());
    ProcessCachedData(0, true);
  }

  if (!mOmxDecoder->AllocateMediaResources()) {
    return NS_ERROR_FAILURE;
  }
  // Bug 1050667, both MediaDecoderStateMachine and MediaOmxReader
  // relies on IsWaitingMediaResources() function. And the waiting state will be
  // changed by binder thread, so we store the waiting state in a cache value to
  // make them in consistent state.
  UpdateIsWaitingMediaResources();
  if (IsWaitingMediaResources()) {
    return NS_OK;
  }
  // After resources are available, set the metadata.
  if (!mOmxDecoder->EnsureMetadata()) {
    return NS_ERROR_FAILURE;
  }

  if (isMP3 && mMP3FrameParser.IsMP3()) {
    int64_t duration = mMP3FrameParser.GetDuration();
    // The MP3FrameParser may reported a duration;
    // return -1 if no frame has been parsed.
    if (duration >= 0) {
      ReentrantMonitorAutoEnter mon(mDecoder->GetReentrantMonitor());
      mUseParserDuration = true;
      mLastParserDuration = duration;
      mDecoder->SetMediaDuration(mLastParserDuration);
    }
  } else {
    // Set the total duration (the max of the audio and video track).
    int64_t durationUs;
    mOmxDecoder->GetDuration(&durationUs);
    if (durationUs) {
      ReentrantMonitorAutoEnter mon(mDecoder->GetReentrantMonitor());
      mDecoder->SetMediaDuration(durationUs);
    }
  }

  if (mOmxDecoder->HasVideo()) {
    int32_t displayWidth, displayHeight, width, height;
    mOmxDecoder->GetVideoParameters(&displayWidth, &displayHeight,
                                    &width, &height);
    nsIntRect pictureRect(0, 0, width, height);

    // Validate the container-reported frame and pictureRect sizes. This ensures
    // that our video frame creation code doesn't overflow.
    nsIntSize displaySize(displayWidth, displayHeight);
    nsIntSize frameSize(width, height);
    if (!IsValidVideoRegion(frameSize, pictureRect, displaySize)) {
      return NS_ERROR_FAILURE;
    }

    // Video track's frame sizes will not overflow. Activate the video track.
    mHasVideo = mInfo.mVideo.mHasVideo = true;
    mInfo.mVideo.mDisplay = displaySize;
    mPicture = pictureRect;
    mInitialFrame = frameSize;
    VideoFrameContainer* container = mDecoder->GetVideoFrameContainer();
    if (container) {
      container->SetCurrentFrame(gfxIntSize(displaySize.width, displaySize.height),
                                 nullptr,
                                 mozilla::TimeStamp::Now());
    }
  }

  if (mOmxDecoder->HasAudio()) {
    int32_t numChannels, sampleRate;
    mOmxDecoder->GetAudioParameters(&numChannels, &sampleRate);
    mHasAudio = mInfo.mAudio.mHasAudio = true;
    mInfo.mAudio.mChannels = numChannels;
    mInfo.mAudio.mRate = sampleRate;
  }

 *aInfo = mInfo;

#ifdef MOZ_AUDIO_OFFLOAD
  CheckAudioOffload();
#endif

//.........这里部分代码省略.........

nsresult MediaOmxReader::ReadMetadata(MediaInfo* aInfo,
                                      MetadataTags** aTags)
{
  NS_ASSERTION(mDecoder->OnDecodeThread(), "Should be on decode thread.");
  EnsureActive();

  *aTags = nullptr;

  // Initialize the internal OMX Decoder.
  nsresult rv = InitOmxDecoder();
  if (NS_FAILED(rv)) {
    return rv;
  }

  if (!mOmxDecoder->TryLoad()) {
    return NS_ERROR_FAILURE;
  }

#ifdef MOZ_AUDIO_OFFLOAD
  CheckAudioOffload();
#endif

  if (IsWaitingMediaResources()) {
    return NS_OK;
  }

  // Set the total duration (the max of the audio and video track).
  int64_t durationUs;
  mOmxDecoder->GetDuration(&durationUs);
  if (durationUs) {
    ReentrantMonitorAutoEnter mon(mDecoder->GetReentrantMonitor());
    mDecoder->SetMediaDuration(durationUs);
  }

  if (mOmxDecoder->HasVideo()) {
    int32_t displayWidth, displayHeight, width, height;
    mOmxDecoder->GetVideoParameters(&displayWidth, &displayHeight,
                                    &width, &height);
    nsIntRect pictureRect(0, 0, width, height);

    // Validate the container-reported frame and pictureRect sizes. This ensures
    // that our video frame creation code doesn't overflow.
    nsIntSize displaySize(displayWidth, displayHeight);
    nsIntSize frameSize(width, height);
    if (!IsValidVideoRegion(frameSize, pictureRect, displaySize)) {
      return NS_ERROR_FAILURE;
    }

    // Video track's frame sizes will not overflow. Activate the video track.
    mHasVideo = mInfo.mVideo.mHasVideo = true;
    mInfo.mVideo.mDisplay = displaySize;
    mPicture = pictureRect;
    mInitialFrame = frameSize;
    VideoFrameContainer* container = mDecoder->GetVideoFrameContainer();
    if (container) {
      container->SetCurrentFrame(gfxIntSize(displaySize.width, displaySize.height),
                                 nullptr,
                                 mozilla::TimeStamp::Now());
    }
  }

  if (mOmxDecoder->HasAudio()) {
    int32_t numChannels, sampleRate;
    mOmxDecoder->GetAudioParameters(&numChannels, &sampleRate);
    mHasAudio = mInfo.mAudio.mHasAudio = true;
    mInfo.mAudio.mChannels = numChannels;
    mInfo.mAudio.mRate = sampleRate;
  }

 *aInfo = mInfo;

  return NS_OK;
}