/// <summary>
/// Scan matroska file and fill MkvTracks
/// </summary>
public void GetInfo()
{
// Debug
log.Info("\r\nFile path: " + mpegFilePath + "\r\n" +
"File name: " + mpegFileName + "\r\n" +
"File size: " + mpegFileSize.ToString("#,##0"));
streamManager = new MpegStreamManager(mpegFilePath);
vStream = new MpegVideoStream();
aStream = new MpegAudioStream();
bool isVideo = mvp.Parse(ref streamManager);
if (isVideo)
{
vStream = mvp.VideoStream;
}
bool isAudio = map.Parse(ref streamManager);
if (isAudio)
{
aStream = map.AudioStream;
}
streamManager.Close();
return;
}
/// <summary>
/// Search audio stream using passed MpegStreamManager
/// </summary>
public bool Parse(ref MpegStreamManager msManager)
{
audioStream = new MpegAudioStream();
long offset = 0;
// Search 0x00 0x00 0x01 0xC0 marker [Audio Stream]
bool isAudioContains =
msManager.SearchMarker(ref offset, new byte[4]{0x00, 0x00, 0x01, 0xC0});
if (!isAudioContains)
{
// there isn't audio
return false;
}
offset += 13;
bool isAudio = false;
while (!isAudio && offset < (msManager.StreamSize - 10))
{
if ((msManager.GetByte(offset) == 0xFF) &&
(msManager.GetByte(offset + 1) & 0xF0) == 0xF0)
{
isAudio = ParseAudioStream(ref msManager, offset);
}
offset ++;
}
if (isAudio)
{
// Audio information added
return true;
}
return false;
}