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Checking Supported DXVA-HD Formats

Checking Supported Input Formats

To get a list of the input formats that the Microsoft DirectX Video Acceleration High Definition (DXVA-HD) device supports, do the following:

  1. Call IDXVAHD_Device::GetVideoProcessorDeviceCaps to get the device capabilities.
  2. Check the InputFormatCount member of the DXVAHD_VPDEVCAPS structure. This member gives the number of supported input formats.
  3. Allocate an array of D3DFORMAT values, of size InputFormatCount.
  4. Pass this array to the IDXVAHD_Device::GetVideoProcessorInputFormats method. The methods fills the array with a list of input formats.

The following code shows these steps:

C++
Copy 

// Checks whether a DXVA-HD device supports a specified input format.

HRESULT CheckInputFormatSupport(
    IDXVAHD_Device          *pDXVAHD,
    const DXVAHD_VPDEVCAPS& caps,
    D3DFORMAT               d3dformat
    )
{
    D3DFORMAT *pFormats = new (std::nothrow) D3DFORMAT[ caps.InputFormatCount ];
    if (pFormats == NULL)
    {
        return E_OUTOFMEMORY;
    }

    HRESULT hr = pDXVAHD->GetVideoProcessorInputFormats(
        caps.InputFormatCount, 
        pFormats
        );

    if (FAILED(hr)) 
    { 
        goto done; 
    }

    UINT index;
    for (index = 0; index < caps.InputFormatCount; index++)
    {
        if (pFormats[index] == d3dformat)
        {
            break;
        }
    }
    if (index == caps.InputFormatCount)
    {
        hr = E_FAIL;
    }

done:
    delete [] pFormats;
    return hr;
}

Checking Supported Output Formats

To get a list of the output formats that the DXVA-HD device supports, do the following:

  1. Call IDXVAHD_Device::GetVideoProcessorDeviceCaps to get the device capabilities.
  2. Check the OutputFormatCount member of the DXVAHD_VPDEVCAPS structure. This member gives the number of supported input formats.
  3. Allocate an array of D3DFORMAT values, of size OutputFormatCount.
  4. Pass this array to the IDXVAHD_Device::GetVideoProcessorOutputFormats method. The methods fills the array with a list of output formats.

The following code shows these steps:

C++
Copy 

// Checks whether a DXVA-HD device supports a specified output format.

HRESULT CheckOutputFormatSupport(
    IDXVAHD_Device          *pDXVAHD,
    const DXVAHD_VPDEVCAPS& caps,
    D3DFORMAT               d3dformat
    )
{
    D3DFORMAT *pFormats = new (std::nothrow) D3DFORMAT[caps.OutputFormatCount];
    if (pFormats == NULL)
    {
        return E_OUTOFMEMORY;
    }

    HRESULT hr = pDXVAHD->GetVideoProcessorOutputFormats(
        caps.OutputFormatCount, 
        pFormats
        );

    if (FAILED(hr)) 
    { 
        goto done; 
    }

    UINT index;
    for (index = 0; index < caps.OutputFormatCount; index++)
    {
        if (pFormats[index] == d3dformat)
        {
            break;
        }
    }
    if (index == caps.OutputFormatCount)
    {
        hr = E_FAIL;
    }

done:
    delete [] pFormats;
    return hr;
}

Related topics

DXVA-HD

 

 

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