private bool ReadTag()
{
uint tagType, dataSize, timeStamp, streamID, mediaInfo;
byte[] data;
if (_fileLength - _fileOffset < 11)
{
return(false);
}
// Read tag header
tagType = ReadUInt8();
dataSize = ReadUInt24();
timeStamp = ReadUInt24();
timeStamp |= ReadUInt8() << 24;
streamID = ReadUInt24();
// Read tag data
if (dataSize == 0)
{
return(true);
}
if (_fileLength - _fileOffset < dataSize)
{
return(false);
}
mediaInfo = ReadUInt8();
dataSize -= 1;
data = ReadBytes((int)dataSize);
if (tagType == 0x8)
{ // Audio
if (_audioWriter == null)
{
_audioWriter = _extractAudio ? GetAudioWriter(mediaInfo) : new DummyAudioWriter();
ExtractedAudio = !(_audioWriter is DummyAudioWriter);
}
_audioWriter.WriteChunk(data, timeStamp);
}
else if (tagType == 0x9 && mediaInfo >> 4 != 5)
{ // Video
if (_videoWriter == null)
{
_videoWriter = _extractVideo ? GetVideoWriter(mediaInfo) : new DummyVideoWriter();
ExtractedVideo = !(_videoWriter is DummyVideoWriter);
}
if (_timeCodeWriter == null)
{
var path = _outputPathBase + ".txt";
_timeCodeWriter = new TimeCodeWriter(_extractTimeCodes && CanWriteTo(path) ? path : null);
ExtractedTimeCodes = _extractTimeCodes;
}
_videoTimeStamps.Add(timeStamp);
_videoWriter.WriteChunk(data, timeStamp, (int)((mediaInfo & 0xF0) >> 4));
_timeCodeWriter.Write(timeStamp);
}
return(true);
}
private void CloseOutput(FractionUInt32?averageFrameRate, bool disposing)
{
if (_videoWriter != null)
{
_videoWriter.Finish(averageFrameRate ?? new FractionUInt32(25, 1));
if (disposing && _videoWriter.Path != null)
{
try { File.Delete(_videoWriter.Path); }
catch { }
}
_videoWriter = null;
}
if (_audioWriter != null)
{
_audioWriter.Finish();
if (disposing && _audioWriter.Path != null)
{
try { File.Delete(_audioWriter.Path); }
catch { }
}
_audioWriter = null;
}
if (_timeCodeWriter != null)
{
_timeCodeWriter.Finish();
if (disposing && _timeCodeWriter.Path != null)
{
try { File.Delete(_timeCodeWriter.Path); }
catch { }
}
_timeCodeWriter = null;
}
}
