static IntPtr InitializeMagicCookie(NativeAudioFile audioFile, NativeAudioConverter converter)
{
Contract.Requires(audioFile != null);
Contract.Requires(converter != null);
uint dataSize;
uint isWritable;
AudioFileStatus getStatus = audioFile.GetPropertyInfo(AudioFilePropertyId.MagicCookieData, out dataSize,
out isWritable);
if (getStatus != AudioFileStatus.Ok)
{
throw new IOException(string.Format(CultureInfo.CurrentCulture,
Resources.LosslessSampleDecoderGetCookieInfoError, getStatus));
}
if (dataSize == 0)
{
return(IntPtr.Zero);
}
IntPtr cookie = audioFile.GetProperty(AudioFilePropertyId.MagicCookieData, dataSize);
AudioConverterStatus setStatus = converter.SetProperty(AudioConverterPropertyId.DecompressionMagicCookie,
dataSize, cookie);
if (setStatus != AudioConverterStatus.Ok)
{
throw new IOException(string.Format(CultureInfo.CurrentCulture,
Resources.LosslessSampleDecoderSetCookieError, setStatus));
}
return(cookie);
}
