public HResult GetStreamCount(
MFInt pcInputStreams,
MFInt pcOutputStreams
)
{
HResult hr = HResult.S_OK;
try
{
// Trace("GetStreamCount"); not interesting
lock (m_TransformLockObject)
{
// This template requires a fixed number of input and output
// streams (1 for each).
if (pcInputStreams != null)
{
pcInputStreams.Assign(1);
}
if (pcOutputStreams != null)
{
pcOutputStreams.Assign(1);
}
}
}
catch (Exception e)
{
hr = (HResult)Marshal.GetHRForException(e);
}
return(hr); // CheckReturn(hr);
}
/// <summary>
/// Gets information from the registry about a Media Foundation transform (MFT).
/// </summary>
/// <param name="clsidMFT">The CLSID of the MFT to query.</param>
/// <param name="name">Receives the name of the MFT.</param>
/// <param name="inputTypes">Receives an array of input types supported by the MFT.</param>
/// <param name="outputTypes">Receives an array of output types supported by the MFT.</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 GetInfo(Guid clsidMFT, out string name, out MFTRegisterTypeInfo[] inputTypes, out MFTRegisterTypeInfo[] outputTypes)
{
ArrayList inTypes = new ArrayList();
ArrayList outTypes = new ArrayList();
MFInt inTypesCount = new MFInt();
MFInt outTypesCount = new MFInt();
HResult hr = MFExtern.MFTGetInfo(clsidMFT, out name, inTypes, inTypesCount, outTypes, outTypesCount, IntPtr.Zero);
inputTypes = new MFTRegisterTypeInfo[inTypesCount];
for (int i = 0; i < inTypesCount.ToInt32(); i++)
{
inputTypes[i] = (MFTRegisterTypeInfo)inTypes[i];
}
outputTypes = new MFTRegisterTypeInfo[outTypesCount];
for (int i = 0; i < outTypesCount.ToInt32(); i++)
{
outputTypes[i] = (MFTRegisterTypeInfo)outTypes[i];
}
return(hr);
}
public static extern void MFTEnum(
[In, MarshalAs(UnmanagedType.Struct)] Guid guidCategory,
[In] int Flags, // Must be zero
[In, MarshalAs(UnmanagedType.LPStruct)] MFTRegisterTypeInfo pInputType,
[In, MarshalAs(UnmanagedType.LPStruct)] MFTRegisterTypeInfo pOutputType,
[In] IMFAttributes pAttributes,
[In, Out, MarshalAs(UnmanagedType.CustomMarshaler, MarshalCookie = "0", MarshalTypeRef = typeof(GAMarshaler))]
ArrayList ppclsidMFT,
[In, Out, MarshalAs(UnmanagedType.CustomMarshaler, MarshalCookie = "0", MarshalTypeRef = typeof(GAMarshaler))]
MFInt pcMFTs
);
public static extern HResult _MFTGetInfo(
[In, MarshalAs(UnmanagedType.Struct)] Guid clsidMFT,
[MarshalAs(UnmanagedType.LPWStr)] out string pszName,
[In, Out, MarshalAs(UnmanagedType.CustomMarshaler, MarshalCookie = "0", MarshalTypeRef = typeof(RTIMarshaler))]
ArrayList ppInputTypes,
[In, Out, MarshalAs(UnmanagedType.CustomMarshaler, MarshalCookie = "0", MarshalTypeRef = typeof(RTIMarshaler))]
MFInt pcInputTypes,
[In, Out, MarshalAs(UnmanagedType.CustomMarshaler, MarshalCookie = "1", MarshalTypeRef = typeof(RTIMarshaler))]
ArrayList ppOutputTypes,
[In, Out, MarshalAs(UnmanagedType.CustomMarshaler, MarshalCookie = "1", MarshalTypeRef = typeof(RTIMarshaler))]
MFInt pcOutputTypes,
IntPtr ip // Must be IntPtr.Zero due to MF bug, but should be out IMFAttributes ppAttributes
);
public HResult GetStreamLimits(
MFInt pdwInputMinimum,
MFInt pdwInputMaximum,
MFInt pdwOutputMinimum,
MFInt pdwOutputMaximum
)
{
HResult hr = HResult.S_OK;
try
{
Trace("GetStreamLimits");
// This template requires a fixed number of input and output
// streams (1 for each).
lock (m_TransformLockObject)
{
// Fixed stream limits.
if (pdwInputMinimum != null)
{
pdwInputMinimum.Assign(1);
}
if (pdwInputMaximum != null)
{
pdwInputMaximum.Assign(1);
}
if (pdwOutputMinimum != null)
{
pdwOutputMinimum.Assign(1);
}
if (pdwOutputMaximum != null)
{
pdwOutputMaximum.Assign(1);
}
}
}
catch (Exception e)
{
hr = (HResult)Marshal.GetHRForException(e);
}
return(CheckReturn(hr));
}
