/// <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);
}
private void TestEnum()
{
ArrayList a1 = new ArrayList();
MFInt i1 = new MFInt(0);
MFInt i2 = new MFInt(0);
MFInt i3 = new MFInt(0);
MFInt i4 = new MFInt(0);
MFTRegisterTypeInfo rin = new MFTRegisterTypeInfo();
MFTRegisterTypeInfo rout = new MFTRegisterTypeInfo();
rin.guidMajorType = MFMediaType.Video;
rin.guidSubtype = new FourCC("AYUV").ToMediaSubtype();
rout.guidMajorType = MFMediaType.Video;
rout.guidSubtype = new FourCC("NV12").ToMediaSubtype();
int hr = MFExtern.MFTEnum(Guid.Empty, 0, null, null, null, a1, i1);
MFError.ThrowExceptionForHR(hr);
hr = MFExtern.MFTEnum(MFTransformCategory.MFT_CATEGORY_VIDEO_EFFECT, 0, null, null, null, a1, i2);
MFError.ThrowExceptionForHR(hr);
hr = MFExtern.MFTEnum(MFTransformCategory.MFT_CATEGORY_VIDEO_EFFECT, 0, rin, null, null, a1, i3);
MFError.ThrowExceptionForHR(hr);
hr = MFExtern.MFTEnum(MFTransformCategory.MFT_CATEGORY_VIDEO_EFFECT, 0, rin, rout, null, a1, i4);
MFError.ThrowExceptionForHR(hr);
Debug.Assert(i1 > 0 && i1 > i2 && i2 >= i3 && i3 >= i4 && i4 > 0);
for (int y = 0; y < i4; y++)
{
MFInt itypescnt = new MFInt(0);
MFInt otypescnt = new MFInt(0);
ArrayList a = new ArrayList();
ArrayList b = new ArrayList();
Guid mft = (Guid)a1[y];
string s;
hr = MFExtern.MFTGetInfo(
mft,
out s,
a,
itypescnt,
b,
otypescnt,
IntPtr.Zero);
MFError.ThrowExceptionForHR(hr);
hr = MFExtern.MFTGetInfo(
mft,
out s,
null,
null,
null,
null,
IntPtr.Zero);
MFError.ThrowExceptionForHR(hr);
for (int x = 0; x < itypescnt; x++)
{
MFTRegisterTypeInfo rti = a[x] as MFTRegisterTypeInfo;
if (FourCC.IsA4ccSubtype(rti.guidMajorType))
{
Debug.Write(new FourCC(rti.guidMajorType).ToString());
Debug.Write(" ");
}
Debug.WriteLine(rti.guidMajorType);
if (FourCC.IsA4ccSubtype(rti.guidSubtype))
{
Debug.Write(new FourCC(rti.guidSubtype).ToString());
Debug.Write(" ");
}
Debug.WriteLine(rti.guidSubtype);
}
Debug.WriteLine("----------------------");
for (int x = 0; x < otypescnt; x++)
{
MFTRegisterTypeInfo rti = b[x] as MFTRegisterTypeInfo;
if (FourCC.IsA4ccSubtype(rti.guidMajorType))
{
Debug.Write(new FourCC(rti.guidMajorType).ToString());
Debug.Write(" ");
}
Debug.WriteLine(rti.guidMajorType);
if (FourCC.IsA4ccSubtype(rti.guidSubtype))
{
Debug.Write(new FourCC(rti.guidSubtype).ToString());
Debug.Write(" ");
}
Debug.WriteLine(rti.guidSubtype);
}
Debug.WriteLine("===============================");
}
}
private void TestReg()
{
// HKEY_CLASSES_ROOT\MediaFoundation\Transforms\ffa0d1f1-da7c-49cc-91ea-484dcf94a70a
Guid g1 = new Guid("{ffa0d1f1-da7c-49cc-91ea-484dcf94a70a}");
string s;
MFInt icnt = new MFInt(0);
MFInt ocnt = new MFInt(0);
IntPtr ip = IntPtr.Zero;
ArrayList it = new ArrayList();
ArrayList ot = new ArrayList();
int hr = MFExtern.MFTRegister(
g1,
MFTransformCategory.MFT_CATEGORY_VIDEO_EFFECT,
"asdf",
0,
0,
null,
0,
null,
null);
MFError.ThrowExceptionForHR(hr);
hr = MFExtern.MFTGetInfo(g1, out s, it, icnt, ot, ocnt, ip);
MFError.ThrowExceptionForHR(hr);
hr = MFExtern.MFTUnregister(g1);
// Always returns an error (http://social.msdn.microsoft.com/Forums/br/mediafoundationdevelopment/thread/7d3dc70f-8eae-4ad0-ad90-6c596cf78c80)
//MFError.ThrowExceptionForHR(hr);
Debug.Assert(s == "asdf");
MFTRegisterTypeInfo [] it1 = new MFTRegisterTypeInfo[2];
MFTRegisterTypeInfo [] ot1 = new MFTRegisterTypeInfo[3];
it1[0] = new MFTRegisterTypeInfo();
it1[1] = new MFTRegisterTypeInfo();
ot1[0] = new MFTRegisterTypeInfo();
ot1[1] = new MFTRegisterTypeInfo();
ot1[2] = new MFTRegisterTypeInfo();
it1[0].guidMajorType = MFMediaType.Video;
it1[1].guidSubtype = new Guid("00000000-1111-2222-3333-444444444444");
it1[1].guidMajorType = MFMediaType.Video;
ot1[0].guidMajorType = MFMediaType.Video;
ot1[1].guidMajorType = MFMediaType.Video;
ot1[2].guidMajorType = MFMediaType.Video;
hr = MFExtern.MFTRegister(
g1,
MFTransformCategory.MFT_CATEGORY_VIDEO_EFFECT,
"fdsa",
0,
it1.Length,
it1,
ot1.Length,
ot1,
null);
MFError.ThrowExceptionForHR(hr);
ArrayList it2 = new ArrayList();
ArrayList ot2 = new ArrayList();
hr = MFExtern.MFTGetInfo(g1, out s, it2, icnt, ot2, ocnt, IntPtr.Zero);
MFError.ThrowExceptionForHR(hr);
Debug.Assert(s == "fdsa");
Debug.Assert(icnt == it1.Length && ocnt == ot1.Length);
Debug.Assert(it2.Count == icnt &&
it1[0].guidMajorType == ((MFTRegisterTypeInfo)it2[0]).guidMajorType &&
it1[0].guidSubtype == ((MFTRegisterTypeInfo)it2[0]).guidSubtype &&
it1[1].guidMajorType == ((MFTRegisterTypeInfo)it2[1]).guidMajorType &&
it1[1].guidSubtype == ((MFTRegisterTypeInfo)it2[1]).guidSubtype
);
Debug.Assert(ot2.Count == ocnt &&
ot1[0].guidMajorType == ((MFTRegisterTypeInfo)ot2[0]).guidMajorType &&
ot1[0].guidSubtype == ((MFTRegisterTypeInfo)ot2[0]).guidSubtype &&
ot1[1].guidMajorType == ((MFTRegisterTypeInfo)ot2[1]).guidMajorType &&
ot1[1].guidSubtype == ((MFTRegisterTypeInfo)ot2[1]).guidSubtype &&
ot1[2].guidMajorType == ((MFTRegisterTypeInfo)ot2[2]).guidMajorType &&
ot1[2].guidSubtype == ((MFTRegisterTypeInfo)ot2[2]).guidSubtype
);
hr = MFExtern.MFTUnregister(g1);
// Always returns an error: http://social.msdn.microsoft.com/Forums/br/mediafoundationdevelopment/thread/7d3dc70f-8eae-4ad0-ad90-6c596cf78c80
//MFError.ThrowExceptionForHR(hr);
}
// Called just after invoking the COM method. The IntPtr is the same one that just got returned
// from MarshalManagedToNative. The return value is unused.
public object MarshalNativeToManaged(IntPtr pNativeData)
{
// When we are called with pNativeData == m_ArrayPtr, do nothing. All the
// work is done when:
if (pNativeData == m_MFIntPtr)
{
// Read the count
int count = Marshal.ReadInt32(pNativeData);
// If we have an array to return things in (ie MFTGetInfo wasn't passed
// nulls)
if (m_array != null)
{
IntPtr ip2 = Marshal.ReadIntPtr(m_ArrayPtr);
// I don't know why this might happen, but it seems worth the check
if (ip2 != IntPtr.Zero)
{
try
{
int iSize = Marshal.SizeOf(typeof(MFTRegisterTypeInfo));
// Size the array
m_array.Capacity = count;
// Copy in the values
for (int x = 0; x < count; x++)
{
MFTRegisterTypeInfo rti = new MFTRegisterTypeInfo();
Marshal.PtrToStructure(new IntPtr(ip2.ToInt64() + (x * iSize)), rti);
m_array.Add(rti);
}
}
finally
{
// Free the array we got back
Marshal.FreeCoTaskMem(ip2);
}
}
}
// Don't forget to assign the value
m_int.Assign(count);
m_int = null;
m_array = null;
}
// This value isn't actually used
return null;
}
/// <summary>
/// Enumerates Media Foundation transforms (MFTs) in the registry.
/// </summary>
/// <param name="transformCategory">Guid specifying the category of MFTs to enumerate.</param>
/// <param name="flags">One or more members of the MFT_EnumFlag enumeration.</param>
/// <param name="inputType">Indicate the input media type that the results must support. If null is passed, the input type is not use to filter the results.</param>
/// <param name="outputType">Indicate the output media type that the results must support. If null is passed, the output type is not use to filter the results.</param>
/// <param name="resultActivate">Receives an array of IMFActivate that match the parameters.</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 EnumEx(Guid transformCategory, MFT_EnumFlag flags, MFTRegisterTypeInfo inputType, MFTRegisterTypeInfo outputType, out IMFActivate[] resultActivate)
{
int resultCount;
return(MFExtern.MFTEnumEx(transformCategory, flags, inputType, outputType, out resultActivate, out resultCount));
}
/// <summary>
/// Enumerates Media Foundation transforms (MFTs) in the registry.
/// </summary>
/// <param name="transformCategory">Guid specifying the category of MFTs to enumerate.</param>
/// <param name="inputType">Indicate the input media type that the results must support. If null is passed, the input type is not use to filter the results.</param>
/// <param name="outputType">Indicate the output media type that the results must support. If null is passed, the output type is not use to filter the results.</param>
/// <param name="attributes">Indicate attributes that the results must support.</param>
/// <param name="resultCLSID">Receives an array of MFT CLSIDs that match the parameters.</param>
/// <returns>If this function succeeds, it returns the S_OK member. Otherwise, it returns another HResult's member that describe the error.</returns>
/// <remarks>The parameter <paramref name="attributes"/> is ingnored on Windows 7 or higher and should be null.</remarks>
public static HResult Enum(Guid transformCategory, MFTRegisterTypeInfo inputType, MFTRegisterTypeInfo outputType, IMFAttributes attributes, out Guid[] resultCLSID)
{
int resultCount;
return(MFExtern.MFTEnum(transformCategory, 0, inputType, outputType, attributes, out resultCLSID, out resultCount));
}
