IMFVideoSampleAllocatorEx Interface

Allocates video samples that contain Microsoft Direct3D 11 texture surfaces.

Syntax

interface IMFVideoSampleAllocatorEx : public IMFVideoSampleAllocator  

Remarks

You can use this interface to allocateMicrosoft Direct3D 11 video samples, rather than allocate the texture surfaces and media samples directly. To get a pointer to this interface, call the MFCreateVideoSampleAllocatorEx function.

To allocate video samples, perform the following steps:

1. Obtain a pointer to the IMFDXGIDeviceManager interface. For a Media Foundation transform (MFT), this step occurs during the MFT_MESSAGE_SET_D3D_MANAGER event.
2. Call MFCreateVideoSampleAllocatorEx to create the allocator object and get a pointer to the IMFVideoSampleAllocatorEx interface.
3. Call IMFVideoSampleAllocator::SetDirectXManager on the allocator to set the IMFDXGIDeviceManager pointer on the allocator.
4. Call MFCreateAttributes to get a pointer to the IMFAttributes interface.
5. Set the MF_SA_D3D11_USAGE and MF_SA_D3D11_BINDFLAGS attributes.
6. Call IMFVideoSampleAllocator::InitializeSampleAllocatorEx.

Requirements

Header: Declared in mfidl.h.