基于winsdk8.1的dxvahd中VideoProcessBltHD使用示例

以下是基于 WinSDK 8.1 的 DXVA-HD 中 VideoProcessBltHD 函数的使用示例：

首先，需要初始化 D3D 设备和 DXVA-HD 设备：

// 初始化 D3D 设备
D3D_FEATURE_LEVEL featureLevels[] = { D3D_FEATURE_LEVEL_11_0 };
D3D_FEATURE_LEVEL featureLevel;
HRESULT hr = D3D11CreateDevice(nullptr, D3D_DRIVER_TYPE_HARDWARE, nullptr, 0, featureLevels, _countof(featureLevels), D3D11_SDK_VERSION, &m_d3dDevice, &featureLevel, &m_d3dContext);
if (FAILED(hr))
{
    // 处理错误
}

// 初始化 DXVA-HD 设备
hr = CreateDXVAVideoService(m_d3dDevice, &m_dxvaVideoService);
if (FAILED(hr))
{
    // 处理错误
}

然后，创建源和目标表面，并将视频帧数据复制到源表面：

// 创建源表面
D3D11_TEXTURE2D_DESC textureDesc = {};
textureDesc.Width = videoWidth;
textureDesc.Height = videoHeight;
textureDesc.MipLevels = 1;
textureDesc.ArraySize = 1;
textureDesc.Format = DXGI_FORMAT_NV12;
textureDesc.SampleDesc.Count = 1;
textureDesc.Usage = D3D11_USAGE_DEFAULT;
textureDesc.BindFlags = D3D11_BIND_SHADER_RESOURCE | D3D11_BIND_DECODER;
textureDesc.MiscFlags = D3D11_RESOURCE_MISC_SHARED;
HRESULT hr = m_d3dDevice->CreateTexture2D(&textureDesc, nullptr, &m_sourceTexture);
if (FAILED(hr))
{
    // 处理错误
}

// 复制视频帧数据到源表面
D3D11_BOX box = {};
box.left = 0;
box.right = videoWidth;
box.top = 0;
box.bottom = videoHeight;
box.front = 0;
box.back = 1;
m_d3dContext->UpdateSubresource(m_sourceTexture, 0, &box, pVideoFrame, videoWidth, 0);

接下来，创建 VideoProcessor 对象和输入输出流：

// 创建 VideoProcessor 对象
hr = m_dxvaVideoService->CreateVideoProcessor(&m_videoProcessorGuid, &m_videoProcessor);
if (FAILED(hr))
{
    // 处理错误
}

// 创建输入输出流
DXVAHD_STREAM_DATA streamData = {};
streamData.Enable = TRUE;
streamData.OutputIndex = 0;
hr = m_dxvaVideoService->CreateVideoProcessorInputView(m_sourceTexture, m_videoProcessor, nullptr, &m_inputStream, 1, &streamData);
if (FAILED(hr))
{
    // 处理错误
}

DXVAHD_OUTPUT_STREAM_DATA outputStreamData = {};
outputStreamData.Enable = TRUE;
outputStreamData.OutputIndex = 0;
outputStreamData.PresentationTime = 0;
hr = m_dxvaVideoService->CreateVideoProcessorOutputView(m_destTexture, m_videoProcessor, nullptr, &m_outputStream, 1, &outputStreamData);
if (FAILED(hr))
{
    // 处理错误
}

最后，使用 VideoProcessBltHD 函数进行视频帧处理：

// 设置 VideoProcessor 输入输出流
hr = m_dxvaVideoService->VideoProcessorSetInputStream(m_videoProcessor, 0, m_inputStream, 0);
if (FAILED(hr))
{
    // 处理错误
}

hr = m_dxvaVideoService->VideoProcessorSetOutputStream(m_videoProcessor, 0, m_outputStream, 0);
if (FAILED(hr))
{
    // 处理错误
}

// 处理视频帧
DXVAHD_STREAM_STATE streamState = {};
hr = m_dxvaVideoService->VideoProcessorBlt(m_videoProcessor, 0, &streamState);
if (FAILED(hr))
{
    // 处理错误
}

以上就是基于 WinSDK 8.1 的 DXVA-HD 中 VideoProcessBltHD 函数的使用示例。需要注意的是，这只是一个简单的示例，实际使用中还需要进行错误处理和资源释放等操作。