/// <summary>
/// retrieves the media type that was set for an output stream, if any
/// </summary>
/// <param name="outputStreamIndex">Output stream index</param>
/// <returns>DMO Media Type or null if no more available</returns>
public DmoMediaType GetOutputCurrentType(int outputStreamIndex)
{
DmoMediaType mediaType;
int hresult = mediaObject.GetOutputCurrentType(outputStreamIndex, out mediaType);
if (hresult == HResult.S_OK)
{
// this frees the format (if present)
// we should therefore come up with a way of marshaling the format
// into a completely managed structure
DmoInterop.MoFreeMediaType(ref mediaType);
return(mediaType);
}
else
{
if (hresult == (int)DmoHResults.DMO_E_TYPE_NOT_SET)
{
throw new InvalidOperationException("Media type was not set.");
}
else
{
throw Marshal.GetExceptionForHR(hresult);
}
}
}
/// <summary>
/// Tests if the specified Wave Format is supported for output
/// n.b. may need to set the input type first
/// </summary>
/// <param name="outputStreamIndex">Output stream index</param>
/// <param name="waveFormat">Wave format</param>
/// <returns>True if supported</returns>
public bool SupportsOutputWaveFormat(int outputStreamIndex, WaveFormat waveFormat)
{
DmoMediaType mediaType = CreateDmoMediaTypeForWaveFormat(waveFormat);
bool supported = SetOutputType(outputStreamIndex, mediaType, DmoSetTypeFlags.DMO_SET_TYPEF_TEST_ONLY);
DmoInterop.MoFreeMediaType(ref mediaType);
return(supported);
}
/// <summary>
/// Requests whether the specified Wave format is supported as an input
/// </summary>
/// <param name="inputStreamIndex">Input stream index</param>
/// <param name="waveFormat">Wave format</param>
/// <returns>true if supported</returns>
// Token: 0x0600031F RID: 799 RVA: 0x0000A7A8 File Offset: 0x000089A8
public bool SupportsInputWaveFormat(int inputStreamIndex, WaveFormat waveFormat)
{
DmoMediaType mediaType = this.CreateDmoMediaTypeForWaveFormat(waveFormat);
bool result = this.SetInputType(inputStreamIndex, mediaType, DmoSetTypeFlags.DMO_SET_TYPEF_TEST_ONLY);
DmoInterop.MoFreeMediaType(ref mediaType);
return(result);
}
/// <summary>
/// Helper function to make a DMO Media Type to represent a particular WaveFormat
/// </summary>
private DmoMediaType CreateDmoMediaTypeForWaveFormat(WaveFormat waveFormat)
{
DmoMediaType mediaType = new DmoMediaType();
int waveFormatExSize = Marshal.SizeOf(waveFormat); // 18 + waveFormat.ExtraSize;
DmoInterop.MoInitMediaType(ref mediaType, waveFormatExSize);
mediaType.SetWaveFormat(waveFormat);
return(mediaType);
}
/// <summary>
/// Helper function to make a DMO Media Type to represent a particular WaveFormat
/// </summary>
// Token: 0x06000320 RID: 800 RVA: 0x0000A7D0 File Offset: 0x000089D0
private DmoMediaType CreateDmoMediaTypeForWaveFormat(WaveFormat waveFormat)
{
DmoMediaType result = default(DmoMediaType);
int formatBlockBytes = Marshal.SizeOf(waveFormat);
DmoInterop.MoInitMediaType(ref result, formatBlockBytes);
result.SetWaveFormat(waveFormat);
return(result);
}
/// <summary>
/// Set output type to the specified wave format
/// n.b. may need to set input type first
/// </summary>
/// <param name="outputStreamIndex">Output stream index</param>
/// <param name="waveFormat">Wave format</param>
public void SetOutputWaveFormat(int outputStreamIndex, WaveFormat waveFormat)
{
DmoMediaType mediaType = CreateDmoMediaTypeForWaveFormat(waveFormat);
bool succeeded = SetOutputType(outputStreamIndex, mediaType, DmoSetTypeFlags.None);
DmoInterop.MoFreeMediaType(ref mediaType);
if (!succeeded)
{
throw new ArgumentException("Media Type not supported");
}
}
/// <summary>
/// Sets the input type to the specified Wave format
/// </summary>
/// <param name="inputStreamIndex">Input stream index</param>
/// <param name="waveFormat">Wave format</param>
// Token: 0x0600031E RID: 798 RVA: 0x0000A770 File Offset: 0x00008970
public void SetInputWaveFormat(int inputStreamIndex, WaveFormat waveFormat)
{
DmoMediaType mediaType = this.CreateDmoMediaTypeForWaveFormat(waveFormat);
bool flag = this.SetInputType(inputStreamIndex, mediaType, DmoSetTypeFlags.None);
DmoInterop.MoFreeMediaType(ref mediaType);
if (!flag)
{
throw new ArgumentException("Media Type not supported");
}
}
/// <summary>
/// retrieves the media type that was set for an output stream, if any
/// </summary>
/// <param name="outputStreamIndex">Output stream index</param>
/// <returns>DMO Media Type or null if no more available</returns>
// Token: 0x06000318 RID: 792 RVA: 0x0000A430 File Offset: 0x00008630
public DmoMediaType GetOutputCurrentType(int outputStreamIndex)
{
DmoMediaType result;
int outputCurrentType = this.mediaObject.GetOutputCurrentType(outputStreamIndex, out result);
if (outputCurrentType == 0)
{
DmoInterop.MoFreeMediaType(ref result);
return(result);
}
if (outputCurrentType == -2147220989)
{
throw new InvalidOperationException("Media type was not set.");
}
throw Marshal.GetExceptionForHR(outputCurrentType);
}
/// <summary>
/// Gets the DMO Media Output type
/// </summary>
/// <param name="outputStream">The output stream</param>
/// <param name="outputTypeIndex">Output type index</param>
/// <returns>DMO Media Type or null if no more available</returns>
// Token: 0x06000317 RID: 791 RVA: 0x0000A3CC File Offset: 0x000085CC
public DmoMediaType?GetOutputType(int outputStream, int outputTypeIndex)
{
try
{
DmoMediaType value;
if (this.mediaObject.GetOutputType(outputStream, outputTypeIndex, out value) == 0)
{
DmoInterop.MoFreeMediaType(ref value);
return(new DmoMediaType?(value));
}
}
catch (COMException exception)
{
if (exception.GetHResult() != -2147220986)
{
throw;
}
}
return(null);
}
private static IEnumerable <DmoDescriptor> GetDmos(Guid category)
{
IEnumDmo enumDmo;
int hresult = DmoInterop.DMOEnum(ref category, DmoEnumFlags.None, 0, null, 0, null, out enumDmo);
Marshal.ThrowExceptionForHR(hresult);
int itemsFetched;
do
{
Guid guid;
IntPtr namePointer;
enumDmo.Next(1, out guid, out namePointer, out itemsFetched);
if (itemsFetched == 1)
{
string name = Marshal.PtrToStringUni(namePointer);
Marshal.FreeCoTaskMem(namePointer);
yield return(new DmoDescriptor(name, guid));
}
}while (itemsFetched > 0);
yield break;
}
/// <summary>
/// Gets the DMO Media Output type
/// </summary>
/// <param name="outputStream">The output stream</param>
/// <param name="outputTypeIndex">Output type index</param>
/// <returns>DMO Media Type or null if no more available</returns>
public DmoMediaType?GetOutputType(int outputStream, int outputTypeIndex)
{
try
{
DmoMediaType mediaType;
int hresult = mediaObject.GetOutputType(outputStream, outputTypeIndex, out mediaType);
if (hresult == HResult.S_OK)
{
// this frees the format (if present)
// we should therefore come up with a way of marshaling the format
// into a completely managed structure
DmoInterop.MoFreeMediaType(ref mediaType);
return(mediaType);
}
}
catch (COMException e)
{
if (e.ErrorCode != (int)DmoHResults.DMO_E_NO_MORE_ITEMS)
{
throw;
}
}
return(null);
}
