Render an IDirect3DSurface9 from DXVA2?

问题

I got a IDirect3DSurface9 from DXVA2 video decoder using hardware acceleration.

I'm try to Render this hardware IDirect3DSurface9 on My Window via its handle. The following is my summary code.

The first, I call dxva2_init(AVCodecContext *s, HWND hwnd); with hwnd is window's handle

int dxva2_init(AVCodecContext *s, HWND hwnd)
{
    InputStream *ist = (InputStream *)s->opaque;
    int loglevel = (ist->hwaccel_id == HWACCEL_AUTO) ? AV_LOG_VERBOSE : AV_LOG_ERROR;
    DXVA2Context *ctx;
    int ret;

    if (!ist->hwaccel_ctx) {
        ret = dxva2_alloc(s);
        if (ret < 0)
            return ret;
    }
    ctx = (DXVA2Context *)ist->hwaccel_ctx;
    ctx->deviceHandle = hwnd;
    if (s->codec_id == AV_CODEC_ID_H264 &&
        (s->profile & ~FF_PROFILE_H264_CONSTRAINED) > FF_PROFILE_H264_HIGH) {
        av_log(NULL, loglevel, "Unsupported H.264 profile for DXVA2 HWAccel: %d\n", s->profile);
        return AVERROR(EINVAL);
    }

    if (ctx->decoder)
        dxva2_destroy_decoder(s);

    ret = dxva2_create_decoder(s);
    if (ret < 0) {
        av_log(NULL, loglevel, "Error creating the DXVA2 decoder\n");
        return ret;
    }

    return 0;
}

After Decoding successful, I got got a IDirect3DSurface9, and I Render it by following function.

 int dxva2_render(AVCodecContext *s, AVFrame *frame)
{
    LPDIRECT3DSURFACE9 surface = (LPDIRECT3DSURFACE9)frame->data[3];
    InputStream        *ist = (InputStream *)s->opaque;
    DXVA2Context       *ctx = (DXVA2Context *)ist->hwaccel_ctx;

    try
    {
        lockRenderCS.Enter();
        HRESULT hr = ctx->d3d9device->Clear(0, NULL, D3DCLEAR_TARGET, D3DCOLOR_XRGB(255, 0, 0), 1.0f, 0);
        if (hr != D3D_OK)
            return 0;

        hr = ctx->d3d9device->BeginScene();
        if (hr != D3D_OK)
            return 0;

        hr = ctx->d3d9device->GetBackBuffer(0, 0, D3DBACKBUFFER_TYPE_MONO, &pBackBuffer);
        if (hr != D3D_OK)
            return 0;

        hr = ctx->d3d9device->StretchRect(surface, NULL, pBackBuffer, NULL, D3DTEXF_LINEAR);
        if (hr != D3D_OK)
            return 0;

        hr = ctx->d3d9device->EndScene();
        if (hr != D3D_OK)
            return 0;

        hr = ctx->d3d9device->Present(NULL, NULL, NULL, NULL);
        if (hr != D3D_OK)
            return 0;
    }
    finally
    {
        lockRenderCS.Leave();
    }
    return 0;
}

Note: All D3D function above: Clear(), BeginScene(), GetBackBuffer(), StretchRect(), EndScene(), Present() were return Successful. But the frame was not display on My Window.

I Guess that, I miss some code for integrated My Window Handle with DXVA2Context. In this code I only assign: ctx->deviceHandle = hwnd; in function dxva2_init().

I search many times, but so far I still cannot find the solution, Anyone can help me?

Many Thanks!

回答1:

I could help with full code.

Without full code, i suggest you to check your use of StretchRect, just like that :

IDirect3DDevice9::StretchRect

StretchRect Restrictions

Driver support varies. See the section on driver support (below) to see which drivers support which source and destination formats.
The source and destination surfaces must be created in the default memory pool.
If filtering is specified, you must set the appropriate filter caps (see StretchRectFilterCaps in D3DCAPS9).
etc...

The idea behind this, we don't know nothing about your d3d9device/surface9 (creation/initialization/parameter/etc...), for example.

Also, you can study this code from my project to do dxva2 decoding :

H264Dxva2Decoder

来源：https://stackoverflow.com/questions/54170536/render-an-idirect3dsurface9-from-dxva2

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