建立 DXVA-HD 視訊處理器

發行項
06/13/2023

Microsoft DirectX Video Acceleration High Definition (DXVA-HD) 使用兩個主要介面：

IDXVAHD_Device。代表 DXVA-HD 裝置。使用此介面來查詢裝置功能並建立視訊處理器。
IDXVAHD_VideoProcessor。表示一組視訊處理功能。使用此介面來執行影片處理 blit。

在下列程式碼中，假設有下列全域變數：

IDirect3D9Ex            *g_pD3D = NULL;     
IDirect3DDevice9Ex      *g_pD3DDevice = NULL;   // Direct3D device.
IDXVAHD_Device          *g_pDXVAHD = NULL;      // DXVA-HD device.
IDXVAHD_VideoProcessor  *g_pDXVAVP = NULL;      // DXVA-HD video processor.
IDirect3DSurface9       *g_pSurface = NULL;     // Video surface.
        
const D3DFORMAT     RENDER_TARGET_FORMAT = D3DFMT_X8R8G8B8;
const D3DFORMAT     VIDEO_FORMAT         = D3DFMT_X8R8G8B8; 
const UINT          VIDEO_FPS            = 60;
const UINT          VIDEO_WIDTH          = 640;
const UINT          VIDEO_HEIGHT         = 480;

若要建立 DXVA-HD 視訊處理器：

以影片內容的描述填入 DXVAHD_CONTENT_DESC 結構。驅動程式會使用這項資訊作為提示，以優化視訊處理器的功能。結構不包含完整的格式描述。

    DXVAHD_RATIONAL fps = { VIDEO_FPS, 1 }; 

    DXVAHD_CONTENT_DESC desc;

    desc.InputFrameFormat = DXVAHD_FRAME_FORMAT_PROGRESSIVE;
    desc.InputFrameRate = fps;
    desc.InputWidth = VIDEO_WIDTH;
    desc.InputHeight = VIDEO_HEIGHT;
    desc.OutputFrameRate = fps;
    desc.OutputWidth = VIDEO_WIDTH;
    desc.OutputHeight = VIDEO_HEIGHT;

呼叫 DXVAHD_CreateDevice 以建立 DXVA-HD 裝置。此函式會傳回 IDXVAHD_Device 介面的指標。

    hr = DXVAHD_CreateDevice(g_pD3DDevice, &desc, DXVAHD_DEVICE_USAGE_PLAYBACK_NORMAL,
        NULL, &pDXVAHD);

呼叫 IDXVAHD_Device：：GetVideoProcessorDeviceCaps。此方法會以裝置功能填入 DXVAHD_VPDEVCAPS 結構。如果您需要特定的視訊處理功能，例如 luma 索引鍵或影像篩選，請使用這個結構檢查其可用性。
```
    DXVAHD_VPDEVCAPS caps;

    hr = pDXVAHD->GetVideoProcessorDeviceCaps(&caps);
```
檢查 DXVA-HD 裝置是否支援所需的輸入視訊格式。檢查支援的 DXVA-HD 格式主題詳細說明此步驟。
檢查 DXVA-HD 裝置是否支援所需的輸出格式。檢查支援的 DXVA-HD 格式一節詳細說明此步驟。

配置 DXVAHD_VPCAPS 結構的陣列。必須配置的陣列元素數目是由步驟 3 中取得之 DXVAHD_VPDEVCAPS結構的VideoProcessorCount成員所指定。

    // Create the array of video processor caps. 

    DXVAHD_VPCAPS *pVPCaps = 
        new (std::nothrow) DXVAHD_VPCAPS[ caps.VideoProcessorCount ];

    if (pVPCaps == NULL)
    {
        return E_OUTOFMEMORY;
    }

每個 DXVAHD_VPCAPS 結構都代表不同的視訊處理器。您可以迴圈執行此陣列，以探索每個視訊處理器的功能。結構包含視訊處理器的反交錯、遠端和畫面播放速率轉換功能的相關資訊。
選取要建立的視訊處理器。 DXVAHD_VPCAPS結構的VPGuid成員包含可唯一識別視訊處理器的 GUID。將此 GUID 傳遞至 IDXVAHD_Device：：CreateVideoProcessor 方法。方法會傳回 IDXVAHD_VideoProcessor 指標。
```
    HRESULT hr = pDXVAHD->GetVideoProcessorCaps(
        caps.VideoProcessorCount, pVPCaps);
```
或者，呼叫 IDXVAHD_Device：：CreateVideoSurface 來建立輸入視訊介面的陣列。

下列程式碼範例顯示完整的步驟順序：

// Initializes the DXVA-HD video processor.

// NOTE: The following example makes some simplifying assumptions:
//
// 1. There is a single input stream.
// 2. The input frame rate matches the output frame rate.
// 3. No advanced DXVA-HD features are needed, such as luma keying or IVTC.
// 4. The application uses a single input video surface.

HRESULT InitializeDXVAHD()
{
    if (g_pD3DDevice == NULL)
    {
        return E_FAIL;
    }

    HRESULT hr = S_OK;

    IDXVAHD_Device          *pDXVAHD = NULL;
    IDXVAHD_VideoProcessor  *pDXVAVP = NULL;
    IDirect3DSurface9       *pSurf = NULL;

    DXVAHD_RATIONAL fps = { VIDEO_FPS, 1 }; 

    DXVAHD_CONTENT_DESC desc;

    desc.InputFrameFormat = DXVAHD_FRAME_FORMAT_PROGRESSIVE;
    desc.InputFrameRate = fps;
    desc.InputWidth = VIDEO_WIDTH;
    desc.InputHeight = VIDEO_HEIGHT;
    desc.OutputFrameRate = fps;
    desc.OutputWidth = VIDEO_WIDTH;
    desc.OutputHeight = VIDEO_HEIGHT;

#ifdef USE_SOFTWARE_PLUGIN    
    HMODULE hSWPlugin = LoadLibrary(L"C:\\dxvahdsw.dll");

    PDXVAHDSW_Plugin pSWPlugin = (PDXVAHDSW_Plugin)GetProcAddress(hSWPlugin, "DXVAHDSW_Plugin");

    hr = DXVAHD_CreateDevice(g_pD3DDevice, &desc,DXVAHD_DEVICE_USAGE_PLAYBACK_NORMAL,
        pSWPlugin, &pDXVAHD);
#else
    hr = DXVAHD_CreateDevice(g_pD3DDevice, &desc, DXVAHD_DEVICE_USAGE_PLAYBACK_NORMAL,
        NULL, &pDXVAHD);
#endif
    if (FAILED(hr))
    {
        goto done;
    }

    DXVAHD_VPDEVCAPS caps;

    hr = pDXVAHD->GetVideoProcessorDeviceCaps(&caps);
    if (FAILED(hr))
    {
        goto done;
    }

    // Check whether the device supports the input and output formats.

    hr = CheckInputFormatSupport(pDXVAHD, caps, VIDEO_FORMAT);
    if (FAILED(hr))
    {
        goto done;
    }

    hr = CheckOutputFormatSupport(pDXVAHD, caps, RENDER_TARGET_FORMAT);
    if (FAILED(hr))
    {
        goto done;
    }

    // Create the VP device.
    hr = CreateVPDevice(pDXVAHD, caps, &pDXVAVP);
    if (FAILED(hr))
    {
        goto done;
    }

    // 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
        );

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


    g_pDXVAHD = pDXVAHD;
    g_pDXVAHD->AddRef();

    g_pDXVAVP = pDXVAVP;
    g_pDXVAVP->AddRef();

    g_pSurface = pSurf;
    g_pSurface->AddRef();

done:
    SafeRelease(&pDXVAHD);
    SafeRelease(&pDXVAVP);
    SafeRelease(&pSurf);
    return hr;
}

此範例中顯示的 CreateVPDevice 函式會建立視訊處理器， (步驟 5–7) ：

// Creates a DXVA-HD video processor.

HRESULT CreateVPDevice(
    IDXVAHD_Device          *pDXVAHD,
    const DXVAHD_VPDEVCAPS& caps,
    IDXVAHD_VideoProcessor  **ppDXVAVP
    )
{
    // Create the array of video processor caps. 
    
    DXVAHD_VPCAPS *pVPCaps = 
        new (std::nothrow) DXVAHD_VPCAPS[ caps.VideoProcessorCount ];

    if (pVPCaps == NULL)
    {
        return E_OUTOFMEMORY;
    }

    HRESULT hr = pDXVAHD->GetVideoProcessorCaps(
        caps.VideoProcessorCount, pVPCaps);

    // At this point, an application could loop through the array and examine
    // the capabilities. For purposes of this example, however, we simply
    // create the first video processor in the list.

    if (SUCCEEDED(hr))
    {
        // The VPGuid member contains the GUID that identifies the video 
        // processor.

        hr = pDXVAHD->CreateVideoProcessor(&pVPCaps[0].VPGuid, ppDXVAVP);
    }

    delete [] pVPCaps;
    return hr;
}

DXVA-HD

共用方式為

建立 DXVA-HD 視訊處理器

意見反應

其他資源

共用方式為

建立 DXVA-HD 視訊處理器

相關主題

意見反應

其他資源