/// <summary>
/// Converts an audio media type to a WaveFormatEx structure.
/// </summary>
/// <param name="mediaType">A valid IMFMediaType instance.</param>
/// <param name="flags">One member of the <see cref="MFWaveFormatExConvertFlags"/> enumaration.</param>
/// <param name="waveFormatEx">Receives a WaveFormatEx structure representing this audio media type.</param>
/// <returns>If this function succeeds, it returns the S_OK member. Otherwise, it returns another HResult's member that describe the error.</returns>
public static HResult CreateWaveFormatEx(this IMFMediaType mediaType, MFWaveFormatExConvertFlags flags, out WaveFormatEx waveFormatEx)
{
if (mediaType == null)
{
throw new ArgumentNullException("mediaType");
}
int structSize;
return(MFExtern.MFCreateWaveFormatExFromMFMediaType(mediaType, out waveFormatEx, out structSize, flags));
}
public unsafe WaveFormat ToWaveFormat(out int bufferSize, MFWaveFormatExConvertFlags flags)
{
IntPtr pointer = IntPtr.Zero;
fixed(void *ptr = &bufferSize)
{
MediaFoundationException.Try(MFCreateWaveFormatExFromMFMediaType(BasePtr.ToPointer(), (void *)(&pointer), (void *)(ptr), (int)flags), "interop", "MFCreateWaveFormatExFromMFMediaType");
}
var waveformat = (WaveFormat)Marshal.PtrToStructure(pointer, typeof(WaveFormat)); //todo:
if (waveformat.WaveFormatTag == AudioEncoding.Extensible)
{
waveformat = (WaveFormatExtensible)Marshal.PtrToStructure(pointer, typeof(WaveFormatExtensible));
}
return(waveformat);
}
/// <summary>
/// Converts the <see cref="MFMediaType"/> to a <see cref="WaveFormat"/>.
/// </summary>
/// <param name="flags">Contains a flag from the <see cref="MFWaveFormatExConvertFlags"/> enumeration.</param>
/// <returns>The <see cref="WaveFormat"/> which got created based on the <see cref="MFMediaType"/>.</returns>
public unsafe WaveFormat ToWaveFormat(MFWaveFormatExConvertFlags flags)
{
IntPtr pointer = IntPtr.Zero;
try
{
int cbSize;
MediaFoundationException.Try(
NativeMethods.MFCreateWaveFormatExFromMFMediaType(BasePtr.ToPointer(), &pointer, &cbSize,
(int)flags), "Interop", "MFCreateWaveFormatExFromMFMediaType");
}
finally
{
Marshal.FreeCoTaskMem(pointer);
}
//var waveformat = (WaveFormat)Marshal.PtrToStructure(pointer, typeof(WaveFormat));
//if (waveformat.WaveFormatTag == AudioEncoding.Extensible)
// waveformat = (WaveFormatExtensible)Marshal.PtrToStructure(pointer, typeof(WaveFormatExtensible));
//return waveformat;
return(WaveFormatMarshaler.PointerToWaveFormat(pointer));
}
/// <summary>
/// Converts the <see cref="MFMediaType"/> to a <see cref="WaveFormat"/>.
/// </summary>
/// <param name="flags">Contains a flag from the <see cref="MFWaveFormatExConvertFlags"/> enumeration.</param>
/// <returns>The <see cref="WaveFormat"/> which got created based on the <see cref="MFMediaType"/>.</returns>
public unsafe WaveFormat ToWaveFormat(MFWaveFormatExConvertFlags flags)
{
IntPtr pointer = IntPtr.Zero;
try
{
int cbSize;
MediaFoundationException.Try(
NativeMethods.MFCreateWaveFormatExFromMFMediaType(BasePtr.ToPointer(), &pointer, &cbSize,
(int) flags), "Interop", "MFCreateWaveFormatExFromMFMediaType");
}
finally
{
Marshal.FreeCoTaskMem(pointer);
}
//var waveformat = (WaveFormat)Marshal.PtrToStructure(pointer, typeof(WaveFormat));
//if (waveformat.WaveFormatTag == AudioEncoding.Extensible)
// waveformat = (WaveFormatExtensible)Marshal.PtrToStructure(pointer, typeof(WaveFormatExtensible));
//return waveformat;
return WaveFormatMarshaler.PointerToWaveFormat(pointer);
}
public static extern void MFCreateWaveFormatExFromMFMediaType(
IMFMediaType pMFType,
[Out, MarshalAs(UnmanagedType.CustomMarshaler, MarshalTypeRef = typeof(WEMarshaler))] out WaveFormatEx ppWF,
out int pcbSize,
MFWaveFormatExConvertFlags Flags
);
public unsafe WaveFormat ToWaveFormat(out int bufferSize, MFWaveFormatExConvertFlags flags)
{
IntPtr pointer = IntPtr.Zero;
fixed (void* ptr = &bufferSize)
{
MediaFoundationException.Try(MFCreateWaveFormatExFromMFMediaType(BasePtr.ToPointer(), (void*)(&pointer), (void*)(ptr), (int)flags), "interop", "MFCreateWaveFormatExFromMFMediaType");
}
var waveformat = (WaveFormat)Marshal.PtrToStructure(pointer, typeof(WaveFormat)); //todo:
if (waveformat.WaveFormatTag == AudioEncoding.Extensible)
waveformat = (WaveFormatExtensible)Marshal.PtrToStructure(pointer, typeof(WaveFormatExtensible));
return waveformat;
}
