C++ Track::GetSegment方法代码示例

 void TrackUnionStream::EndTrack(uint32_t aIndex)
 {
   StreamBuffer::Track* outputTrack = mBuffer.FindTrack(mTrackMap[aIndex].mOutputTrackID);
   if (!outputTrack || outputTrack->IsEnded())
     return;
   for (uint32_t j = 0; j < mListeners.Length(); ++j) {
     MediaStreamListener* l = mListeners[j];
     StreamTime offset = outputTrack->GetSegment()->GetDuration();
     nsAutoPtr<MediaSegment> segment;
     segment = outputTrack->GetSegment()->CreateEmptyClone();
     l->NotifyQueuedTrackChanges(Graph(), outputTrack->GetID(), offset,
                                 MediaStreamListener::TRACK_EVENT_ENDED,
                                 *segment);
   }
   outputTrack->SetEnded();
 }

  void TrackUnionStream::CopyTrackData(StreamBuffer::Track* aInputTrack,
                     uint32_t aMapIndex, GraphTime aFrom, GraphTime aTo,
                     bool* aOutputTrackFinished)
  {
    TrackMapEntry* map = &mTrackMap[aMapIndex];
    StreamBuffer::Track* outputTrack = mBuffer.FindTrack(map->mOutputTrackID);
    MOZ_ASSERT(outputTrack && !outputTrack->IsEnded(), "Can't copy to ended track");

    MediaSegment* segment = map->mSegment;
    MediaStream* source = map->mInputPort->GetSource();

    GraphTime next;
    *aOutputTrackFinished = false;
    for (GraphTime t = aFrom; t < aTo; t = next) {
      MediaInputPort::InputInterval interval = map->mInputPort->GetNextInputInterval(t);
      interval.mEnd = std::min(interval.mEnd, aTo);
      StreamTime inputEnd = source->GraphTimeToStreamTime(interval.mEnd);
      StreamTime inputTrackEndPoint = STREAM_TIME_MAX;

      if (aInputTrack->IsEnded() &&
          aInputTrack->GetEnd() <= inputEnd) {
        inputTrackEndPoint = aInputTrack->GetEnd();
        *aOutputTrackFinished = true;
      }

      if (interval.mStart >= interval.mEnd) {
        break;
      }
      StreamTime ticks = interval.mEnd - interval.mStart;
      next = interval.mEnd;

      StreamTime outputStart = outputTrack->GetEnd();

      if (interval.mInputIsBlocked) {
        // Maybe the input track ended?
        segment->AppendNullData(ticks);
        STREAM_LOG(PR_LOG_DEBUG+1, ("TrackUnionStream %p appending %lld ticks of null data to track %d",
                   this, (long long)ticks, outputTrack->GetID()));
      } else if (InMutedCycle()) {
        segment->AppendNullData(ticks);
      } else {
        MOZ_ASSERT(outputTrack->GetEnd() == GraphTimeToStreamTime(interval.mStart),
                   "Samples missing");
        StreamTime inputStart = source->GraphTimeToStreamTime(interval.mStart);
        segment->AppendSlice(*aInputTrack->GetSegment(),
                             std::min(inputTrackEndPoint, inputStart),
                             std::min(inputTrackEndPoint, inputEnd));
      }
      ApplyTrackDisabling(outputTrack->GetID(), segment);
      for (uint32_t j = 0; j < mListeners.Length(); ++j) {
        MediaStreamListener* l = mListeners[j];
        l->NotifyQueuedTrackChanges(Graph(), outputTrack->GetID(),
                                    outputStart, 0, *segment);
      }
      outputTrack->GetSegment()->AppendFrom(segment);
    }
  }

void
AudioNodeStream::FinishOutput()
{
  StreamBuffer::Track* track = EnsureTrack(AUDIO_TRACK);
  track->SetEnded();

  for (uint32_t j = 0; j < mListeners.Length(); ++j) {
    MediaStreamListener* l = mListeners[j];
    AudioSegment emptySegment;
    l->NotifyQueuedTrackChanges(Graph(), AUDIO_TRACK,
                                track->GetSegment()->GetDuration(),
                                MediaStreamListener::TRACK_EVENT_ENDED, emptySegment);
  }
}

void
DOMHwMediaStream::SetImageSize(uint32_t width, uint32_t height)
{
#ifdef MOZ_WIDGET_GONK
  OverlayImage::Data imgData;

  imgData.mOverlayId = mOverlayImage->GetOverlayId();
  imgData.mSize = IntSize(width, height);
  mOverlayImage->SetData(imgData);
#endif

  SourceMediaStream* srcStream = GetInputStream()->AsSourceStream();
  StreamBuffer::Track* track = srcStream->FindTrack(TRACK_VIDEO_PRIMARY);

  if (!track || !track->GetSegment()) {
    return;
  }

#ifdef MOZ_WIDGET_GONK
  // Clear the old segment.
  // Changing the existing content of segment is a Very BAD thing, and this way will
  // confuse consumers of MediaStreams.
  // It is only acceptable for DOMHwMediaStream
  // because DOMHwMediaStream doesn't have consumers of TV streams currently.
  track->GetSegment()->Clear();

  // Change the image size.
  const StreamTime delta = STREAM_TIME_MAX;
  RefPtr<Image> image = static_cast<Image*>(mOverlayImage.get());
  mozilla::gfx::IntSize size = image->GetSize();
  VideoSegment segment;

  segment.AppendFrame(image.forget(), delta, size);
  srcStream->AppendToTrack(TRACK_VIDEO_PRIMARY, &segment);
#endif
}

void TrackUnionStream::EndTrack(uint32_t aIndex)
{
    StreamBuffer::Track* outputTrack = mBuffer.FindTrack(mTrackMap[aIndex].mOutputTrackID);
    if (!outputTrack || outputTrack->IsEnded())
        return;
    STREAM_LOG(LogLevel::Debug, ("TrackUnionStream %p ending track %d", this, outputTrack->GetID()));
    for (uint32_t j = 0; j < mListeners.Length(); ++j) {
        MediaStreamListener* l = mListeners[j];
        StreamTime offset = outputTrack->GetSegment()->GetDuration();
        nsAutoPtr<MediaSegment> segment;
        segment = outputTrack->GetSegment()->CreateEmptyClone();
        l->NotifyQueuedTrackChanges(Graph(), outputTrack->GetID(), offset,
                                    MediaStreamListener::TRACK_EVENT_ENDED,
                                    *segment,
                                    mTrackMap[aIndex].mInputPort->GetSource(),
                                    mTrackMap[aIndex].mInputTrackID);
    }
    for (TrackBound<MediaStreamTrackListener>& b : mTrackListeners) {
        if (b.mTrackID == outputTrack->GetID()) {
            b.mListener->NotifyEnded();
        }
    }
    outputTrack->SetEnded();
}

void
AudioNodeStream::FinishOutput()
{
  if (IsFinishedOnGraphThread()) {
    return;
  }

  StreamBuffer::Track* track = EnsureTrack();
  track->SetEnded();
  FinishOnGraphThread();

  for (uint32_t j = 0; j < mListeners.Length(); ++j) {
    MediaStreamListener* l = mListeners[j];
    AudioSegment emptySegment;
    l->NotifyQueuedTrackChanges(Graph(), AUDIO_NODE_STREAM_TRACK_ID,
                                IdealAudioRate(),
                                track->GetSegment()->GetDuration(),
                                MediaStreamListener::TRACK_EVENT_ENDED, emptySegment);
  }
}