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Creating DXVA-HD Video Surfaces

  • Článek

The application must create one or more Direct3D surfaces to use for the input frames. These must be allocated in the memory pool specified by the InputPool member of the DXVAHD_VPDEVCAPS structure. The following surface types can be used:

  • A video surface created by calling IDXVAHD_Device::CreateVideoSurface and specifying the DXVAHD_SURFACE_TYPE_VIDEO_INPUT or DXVAHD_SURFACE_TYPE_VIDEO_INPUT_PRIVATE surface type. This surface type is equivalent to an off-screen plain surface.
  • A decoder render-target surface, created by calling IDirectXVideoAccelerationService::CreateSurface and specifying the DXVA2_VideoDecoderRenderTarget surface type. This surface type is used for DXVA decoding.
  • An off-screen plain surface.

The following code shows how to allocate a video surface, using CreateVideoSurface:

    // Create the video surface for the primary video stream.
    hr = pDXVAHD->CreateVideoSurface(
        VIDEO_WIDTH,
        VIDEO_HEIGHT,
        VIDEO_FORMAT,
        caps.InputPool,
        0,  // Usage
        DXVAHD_SURFACE_TYPE_VIDEO_INPUT,
        1,      // Number of surfaces to create
        &pSurf, // Array of surface pointers
        NULL
        );

DXVA-HD