C++ Track::IsEnded方法代码示例

  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 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::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 TrackUnionStream::ProcessInput(GraphTime aFrom, GraphTime aTo, uint32_t aFlags)
 {
   if (IsFinishedOnGraphThread()) {
     return;
   }
   nsAutoTArray<bool,8> mappedTracksFinished;
   nsAutoTArray<bool,8> mappedTracksWithMatchingInputTracks;
   for (uint32_t i = 0; i < mTrackMap.Length(); ++i) {
     mappedTracksFinished.AppendElement(true);
     mappedTracksWithMatchingInputTracks.AppendElement(false);
   }
   bool allFinished = !mInputs.IsEmpty();
   bool allHaveCurrentData = !mInputs.IsEmpty();
   for (uint32_t i = 0; i < mInputs.Length(); ++i) {
     MediaStream* stream = mInputs[i]->GetSource();
     if (!stream->IsFinishedOnGraphThread()) {
       // XXX we really should check whether 'stream' has finished within time aTo,
       // not just that it's finishing when all its queued data eventually runs
       // out.
       allFinished = false;
     }
     if (!stream->HasCurrentData()) {
       allHaveCurrentData = false;
     }
     bool trackAdded = false;
     for (StreamBuffer::TrackIter tracks(stream->GetStreamBuffer());
          !tracks.IsEnded(); tracks.Next()) {
       bool found = false;
       for (uint32_t j = 0; j < mTrackMap.Length(); ++j) {
         TrackMapEntry* map = &mTrackMap[j];
         if (map->mInputPort == mInputs[i] && map->mInputTrackID == tracks->GetID()) {
           bool trackFinished;
           StreamBuffer::Track* outputTrack = mBuffer.FindTrack(map->mOutputTrackID);
           if (!outputTrack || outputTrack->IsEnded()) {
             trackFinished = true;
           } else {
             CopyTrackData(tracks.get(), j, aFrom, aTo, &trackFinished);
           }
           mappedTracksFinished[j] = trackFinished;
           mappedTracksWithMatchingInputTracks[j] = true;
           found = true;
           break;
         }
       }
       if (!found && (!mFilterCallback || mFilterCallback(tracks.get()))) {
         bool trackFinished = false;
         trackAdded = true;
         uint32_t mapIndex = AddTrack(mInputs[i], tracks.get(), aFrom);
         CopyTrackData(tracks.get(), mapIndex, aFrom, aTo, &trackFinished);
         mappedTracksFinished.AppendElement(trackFinished);
         mappedTracksWithMatchingInputTracks.AppendElement(true);
       }
     }
     if (trackAdded) {
       for (MediaStreamListener* l : mListeners) {
         l->NotifyFinishedTrackCreation(Graph());
       }
     }
   }
   for (int32_t i = mTrackMap.Length() - 1; i >= 0; --i) {
     if (mappedTracksFinished[i]) {
       EndTrack(i);
     } else {
       allFinished = false;
     }
     if (!mappedTracksWithMatchingInputTracks[i]) {
       mTrackMap.RemoveElementAt(i);
     }
   }
   if (allFinished && mAutofinish && (aFlags & ALLOW_FINISH)) {
     // All streams have finished and won't add any more tracks, and
     // all our tracks have actually finished and been removed from our map,
     // so we're finished now.
     FinishOnGraphThread();
   } else {
     mBuffer.AdvanceKnownTracksTime(GraphTimeToStreamTime(aTo));
   }
   if (allHaveCurrentData) {
     // We can make progress if we're not blocked
     mHasCurrentData = true;
   }
 }