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) {
string 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;
}
}