Method loadFrame

YUViewLib/src/playlistitem/playlistItemDifference.cpp:220–258

}

void playlistItemDifference::loadFrame(int  frameIdx,
                                       bool playing,
                                       bool loadRawData,
                                       bool emitSignals)
{
  if (childCount() != 2 || !difference.inputsValid())
    return;

  auto state = difference.needsLoading(frameIdx, loadRawData);
  if (state == ItemLoadingState::LoadingNeeded)
  {
    // Load the requested current frame
    DEBUG_DIFF("playlistItemDifference::loadFrame loading difference for frame %d", frameIdx);
    isDifferenceLoading = true;
    // Since every playlist item can have it's own relative indexing, we need two frame indices
    difference.loadFrameDifference(frameIdx);
    isDifferenceLoading = false;
    if (emitSignals)
      emit SignalItemChanged(true, RECACHE_NONE);
  }

  if (playing && (state == ItemLoadingState::LoadingNeeded ||
                  state == ItemLoadingState::LoadingNeededDoubleBuffer))
  {
    // Load the next frame into the double buffer
    int nextFrameIdx = frameIdx + 1;
    if (nextFrameIdx <= this->properties().startEndRange.second)
    {
      DEBUG_DIFF("playlistItemDifference::loadFrame loading difference into double buffer %d %s",
                 nextFrameIdx,
                 playing ? "(playing)" : "");
      isDifferenceLoadingToDoubleBuffer = true;
      difference.loadFrameDifference(frameIdx, true);
      isDifferenceLoadingToDoubleBuffer = false;
      if (emitSignals)
        emit signalItemDoubleBufferLoaded();
    }
  }
}

bool playlistItemDifference::isLoading() const { return this->isDifferenceLoading; }