/// <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 || encoding == WaveFormatEncoding.Wmaudio2 || encoding == WaveFormatEncoding.Wmaudio3))
{
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));
}
public static unsafe WaveFormat MarshalFrom(IntPtr pointer)
{
if (pointer == IntPtr.Zero)
{
return((WaveFormat)null);
}
WaveFormat.__PcmNative @ref = *(WaveFormat.__PcmNative *)(void *) pointer;
WaveFormatEncoding waveFormatEncoding = @ref.waveFormatTag;
if ((int)@ref.channels <= 2 && (waveFormatEncoding == WaveFormatEncoding.Pcm || waveFormatEncoding == WaveFormatEncoding.IeeeFloat || (waveFormatEncoding == WaveFormatEncoding.Wmaudio2 || waveFormatEncoding == WaveFormatEncoding.Wmaudio3)))
{
WaveFormat waveFormat = new WaveFormat();
waveFormat.__MarshalFrom(ref @ref);
return(waveFormat);
}
else if (waveFormatEncoding == WaveFormatEncoding.Extensible)
{
WaveFormatExtensible formatExtensible = new WaveFormatExtensible();
formatExtensible.__MarshalFrom(ref *(WaveFormatExtensible.__Native *)(void *) pointer);
return((WaveFormat)formatExtensible);
}
else
{
if (waveFormatEncoding != WaveFormatEncoding.Adpcm)
{
throw new InvalidOperationException(string.Format("Unsupported WaveFormat [{0}]", (object)waveFormatEncoding));
}
WaveFormatAdpcm waveFormatAdpcm = new WaveFormatAdpcm();
waveFormatAdpcm.__MarshalFrom(ref *(WaveFormatAdpcm.__Native *)(void *) pointer);
return((WaveFormat)waveFormatAdpcm);
}
}
internal unsafe void __MarshalFrom(ref WaveFormatAdpcm.__Native @ref)
{
base.__MarshalFrom(ref @ref.waveFormat);
this.SamplesPerBlock = @ref.samplesPerBlock;
this.Coefficients1 = new short[(int) @ref.numberOfCoefficients];
this.Coefficients2 = new short[(int) @ref.numberOfCoefficients];
if ((int) @ref.numberOfCoefficients > 7)
throw new InvalidOperationException("Unable to read Adpcm format. Too may coefficients (max 7)");
fixed (short* numPtr = &@ref.coefficients)
{
for (int index = 0; index < (int) @ref.numberOfCoefficients; ++index)
{
this.Coefficients1[index] = numPtr[index * 2];
this.Coefficients2[index] = numPtr[index * 2 + 1];
}
}
this.extraSize = (short) (4 + 4 * (int) @ref.numberOfCoefficients);
}
/// <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 static unsafe 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 || encoding == WaveFormatEncoding.Wmaudio2 || encoding == WaveFormatEncoding.Wmaudio3))
{
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));
}
public static unsafe WaveFormat MarshalFrom(IntPtr pointer)
{
if (pointer == IntPtr.Zero)
return (WaveFormat) null;
WaveFormat.__PcmNative @ref = *(WaveFormat.__PcmNative*) (void*) pointer;
WaveFormatEncoding waveFormatEncoding = @ref.waveFormatTag;
if ((int) @ref.channels <= 2 && (waveFormatEncoding == WaveFormatEncoding.Pcm || waveFormatEncoding == WaveFormatEncoding.IeeeFloat || (waveFormatEncoding == WaveFormatEncoding.Wmaudio2 || waveFormatEncoding == WaveFormatEncoding.Wmaudio3)))
{
WaveFormat waveFormat = new WaveFormat();
waveFormat.__MarshalFrom(ref @ref);
return waveFormat;
}
else if (waveFormatEncoding == WaveFormatEncoding.Extensible)
{
WaveFormatExtensible formatExtensible = new WaveFormatExtensible();
formatExtensible.__MarshalFrom(ref *(WaveFormatExtensible.__Native*) (void*) pointer);
return (WaveFormat) formatExtensible;
}
else
{
if (waveFormatEncoding != WaveFormatEncoding.Adpcm)
throw new InvalidOperationException(string.Format("Unsupported WaveFormat [{0}]", (object) waveFormatEncoding));
WaveFormatAdpcm waveFormatAdpcm = new WaveFormatAdpcm();
waveFormatAdpcm.__MarshalFrom(ref *(WaveFormatAdpcm.__Native*) (void*) pointer);
return (WaveFormat) waveFormatAdpcm;
}
}
private unsafe void __MarshalTo(ref WaveFormatAdpcm.__Native @ref)
{
if (this.Coefficients1.Length > 7)
throw new InvalidOperationException("Unable to encode Adpcm format. Too may coefficients (max 7)");
this.extraSize = (short) (4 + 4 * this.Coefficients1.Length);
base.__MarshalTo(ref @ref.waveFormat);
@ref.samplesPerBlock = this.SamplesPerBlock;
@ref.numberOfCoefficients = (ushort) this.Coefficients1.Length;
fixed (short* numPtr = &@ref.coefficients)
{
for (int index = 0; index < (int) @ref.numberOfCoefficients; ++index)
{
numPtr[index * 2] = this.Coefficients1[index];
numPtr[index * 2 + 1] = this.Coefficients2[index];
}
}
}
