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POApply pixel shader to video with DirectX
 

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  1. POApply pixel shader to video with DirectX
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    <p>I need to apply a pixel shader to this code (the fullscreen quad). I have the FX file. What is the procedure? (EDIT finalized: code is working)</p> <pre><code>public int CompositeImage(IntPtr pD3DDevice, IntPtr pddsRenderTarget, AMMediaType pmtRenderTarget, long rtStart, long rtEnd, int dwClrBkGnd, VMR9VideoStreamInfo[] pVideoStreamInfo, int cStreams) { try { if (udevice != pD3DDevice) { InitCompositionDevice(pD3DDevice); } // will be creating managed object from those so increment ref count Marshal.AddRef(pddsRenderTarget); Marshal.AddRef(pVideoStreamInfo[0].pddsVideoSurface); device.Clear(ClearFlags.Target, Color.Red, 1f, 0); device.BeginScene(); // here the video frame will be stored Texture capturedVideoTexture = null; // this is the output surface Surface renderTarget = new Surface(pddsRenderTarget); // get the surface for the input video Surface videoSurface = new Surface(pVideoStreamInfo[0].pddsVideoSurface); // will use this rect for calculations Rectangle videoSurfaceRect = new Rectangle(0, 0, videoSurface.Description.Width, videoSurface.Description.Height); // create single layer texture from input video capturedVideoTexture = new Texture(device, videoSurfaceRect.Width, videoSurfaceRect.Height, 1, Usage.RenderTarget, Format.A8R8G8B8, Pool.Default); // get its surface Surface textureSurface = capturedVideoTexture.GetSurfaceLevel(0); // will use this rect for calculations Rectangle textureSurfaceRect = new Rectangle(0, 0, textureSurface.Description.Width, textureSurface.Description.Height); // copy the whole video surface into the texture surface device.StretchRectangle(videoSurface, videoSurfaceRect, textureSurface, textureSurfaceRect, TextureFilter.Linear); // identity matreices for world projection and view device.Transform.World = Matrix.Identity; device.Transform.Projection = Matrix.Identity; device.Transform.View = Matrix.Identity; // setup viewport Viewport view = new Viewport(); view.X = 0; view.Y = 0; view.Width = 1920; view.Height = 1080; view.MinZ = 0; view.MaxZ = 1; device.Viewport = view; // writing will go to output surface device.SetRenderTarget(0, renderTarget); // nothing fancy of a vertex shader device.VertexFormat = CustomVertex.PositionTextured.Format; // use the texture while rendering device.SetTexture(0, capturedVideoTexture); //Bind our Vertex Buffer device.SetStreamSource(0, vb, 0); // setup and apply shader ps.Begin(FX.None); ps.BeginPass(0); ps.SetValue("ScreenTexture", capturedVideoTexture); //Render from our Vertex Buffer device.DrawPrimitives(PrimitiveType.TriangleList, 0, 2); ps.EndPass(); ps.End(); device.EndScene(); videoSurface.Dispose(); textureSurface.Dispose(); capturedVideoTexture.Dispose(); renderTarget.Dispose(); videoSurface = null; renderTarget = null; capturedVideoTexture = null; } catch (Exception e) { Debug.WriteLine(e.ToString()); } return 0; } </code></pre> <p>This is the final effect achieved: Sepia on the VMR9 video:</p> <p><img src="https://i.stack.imgur.com/HA27j.png" alt="http://img825.imageshack.us/img825/9207/sepiag.png"></p> <p>Now what remains is code the anaglyph shaders for 3D content :)</p>
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    1. USMarino Šimić
    1. USMarino Šimić
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      1. VTUpMod
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    1. COYou say you want help, but you don't ask any questions. Do you expect someone out there to just write the function for you?
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      1. POApply pixel shader to video with DirectX
      1. USPaul Groke
    2. COI need help writing it, I'm in fact a complete noob with DirectX. A sample that does the same thing would be ok. Or a function written by someone else, or perhapse a prototype code...
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      1. USMarino Šimić
    3. COIts a hell of a question to answer. Have you tried attempting to write the code? That way you can, at least, ask questions about specific problems.
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      1. POApply pixel shader to video with DirectX
      1. USGoz
 

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