private void DecodeAviStream(RiffParser rp, int length)
{
var ba = new byte[length];
if (rp.ReadData(ba, 0, length) != length)
{
throw new RiffParserException("Problem reading AVI header.");
}
var aviStreamHeader = new AviStreamHeader
{
FccType = GetInt(ba, 0),
FccHandler = GetInt(ba, 4),
Scale = GetInt(ba, 20),
Rate = GetInt(ba, 24),
Start = GetInt(ba, 28),
Length = GetInt(ba, 32),
SampleSize = GetInt(ba, 44),
};
if (AviRiffData.StreamTypeVideo == aviStreamHeader.FccType)
{
_vidHandler = RiffParser.FromFourCc(aviStreamHeader.FccHandler);
if (aviStreamHeader.Scale > 0)
{
_vidDataRate = (double)aviStreamHeader.Rate / aviStreamHeader.Scale;
}
else
{
_vidDataRate = 0.0;
}
}
else if (AviRiffData.StreamTypeAudio == aviStreamHeader.FccType)
{
if (AviRiffData.Mp3 == aviStreamHeader.FccHandler)
{
_audHandler = "MP3";
}
else
{
_audHandler = RiffParser.FromFourCc(aviStreamHeader.FccHandler);
}
if (aviStreamHeader.Scale > 0)
{
_audDataRate = 8.0 * aviStreamHeader.Rate / aviStreamHeader.Scale;
if (aviStreamHeader.SampleSize > 0)
{
_audDataRate /= aviStreamHeader.SampleSize;
}
}
else
{
_audDataRate = 0.0;
}
}
}
private void DecodeAviStream(RiffParser rp, int length)
{
var ba = new byte[length];
if (rp.ReadData(ba, 0, length) != length)
{
throw new RiffParserException("Problem reading AVI header.");
}
var aviStreamHeader = new AVISTREAMHEADER
{
fccType = GetInt(ba, 0),
fccHandler = GetInt(ba, 4),
dwScale = GetInt(ba, 20),
dwRate = GetInt(ba, 24),
dwStart = GetInt(ba, 28),
dwLength = GetInt(ba, 32),
dwSampleSize = GetInt(ba, 44),
};
if (AviRiffData.streamtypeVIDEO == aviStreamHeader.fccType)
{
_vidHandler = RiffParser.FromFourCc(aviStreamHeader.fccHandler);
if (aviStreamHeader.dwScale > 0)
{
_vidDataRate = (double)aviStreamHeader.dwRate / aviStreamHeader.dwScale;
}
else
{
_vidDataRate = 0.0;
}
}
else if (AviRiffData.streamtypeAUDIO == aviStreamHeader.fccType)
{
if (AviRiffData.ckidMP3 == aviStreamHeader.fccHandler)
{
_audHandler = "MP3";
}
else
{
_audHandler = RiffParser.FromFourCc(aviStreamHeader.fccHandler);
}
if (aviStreamHeader.dwScale > 0)
{
_audDataRate = 8.0 * aviStreamHeader.dwRate / aviStreamHeader.dwScale;
if (aviStreamHeader.dwSampleSize > 0)
{
_audDataRate /= aviStreamHeader.dwSampleSize;
}
}
else
{
_audDataRate = 0.0;
}
}
}
