/// <summary>
/// Helper function to retrieve a WaveFormat structure from a pointer
/// </summary>
/// <param name="pointer">Pointer to the WaveFormat rawdata</param>
/// <returns>WaveFormat structure</returns>
public unsafe static WaveFormat MarshalFrom(IntPtr pointer)
{
if (pointer == IntPtr.Zero)
{
return(null);
}
var pcmWaveFormat = *(__PcmNative *)pointer;
var encoding = pcmWaveFormat.waveFormatTag;
// Load simple PcmWaveFormat if channels <= 2 and encoding is Pcm, IeeFloat, Wmaudio2, Wmaudio3
// See http://msdn.microsoft.com/en-us/library/microsoft.directx_sdk.xaudio2.waveformatex%28v=vs.85%29.aspx
if (pcmWaveFormat.channels <= 2 && (encoding == WaveFormatEncoding.Pcm || encoding == WaveFormatEncoding.IeeeFloat))
{
var waveFormat = new WaveFormat();
waveFormat.__MarshalFrom(ref pcmWaveFormat);
return(waveFormat);
}
if (encoding == WaveFormatEncoding.Extensible)
{
var waveFormat = new WaveFormatExtensible();
waveFormat.__MarshalFrom(ref *(WaveFormatExtensible.__Native *)pointer);
return(waveFormat);
}
if (encoding == WaveFormatEncoding.Adpcm)
{
var waveFormat = new WaveFormatAdpcm();
waveFormat.__MarshalFrom(ref *(WaveFormatAdpcm.__Native *)pointer);
return(waveFormat);
}
throw new InvalidOperationException(string.Format("Unsupported WaveFormat [{0}]", encoding));
}
/// <summary>
/// Helper function to retrieve a WaveFormat structure from a pointer
/// </summary>
/// <param name="pointer">Pointer to the WaveFormat rawdata</param>
/// <returns>WaveFormat structure</returns>
public unsafe static WaveFormat MarshalFrom(IntPtr pointer)
{
if (pointer == IntPtr.Zero) return null;
var pcmWaveFormat = *(__PcmNative*)pointer;
var encoding = pcmWaveFormat.waveFormatTag;
// Load simple PcmWaveFormat if channels <= 2 and encoding is Pcm, IeeFloat, Wmaudio2, Wmaudio3
// See http://msdn.microsoft.com/en-us/library/microsoft.directx_sdk.xaudio2.waveformatex%28v=vs.85%29.aspx
if (pcmWaveFormat.channels <= 2 && (encoding == WaveFormatEncoding.Pcm || encoding == WaveFormatEncoding.IeeeFloat))
{
var waveFormat = new WaveFormat();
waveFormat.__MarshalFrom(ref pcmWaveFormat);
return waveFormat;
}
if (encoding == WaveFormatEncoding.Extensible)
{
var waveFormat = new WaveFormatExtensible();
waveFormat.__MarshalFrom(ref *(WaveFormatExtensible.__Native*)pointer);
return waveFormat;
}
if (encoding == WaveFormatEncoding.Adpcm)
{
var waveFormat = new WaveFormatAdpcm();
waveFormat.__MarshalFrom(ref *(WaveFormatAdpcm.__Native*)pointer);
return waveFormat;
}
throw new InvalidOperationException(string.Format("Unsupported WaveFormat [{0}]", encoding));
}