的Direct3D上傳視頻紋理

Question

我想要的Direct3D 9設備上播放視頻，使用：

1. nVLC - 使用紋理視頻設備上實際顯示的幀 - 用於提取的RGB32從文件
2. SlimDX幀。

這是我的代碼接收RGB32幀;

_videoWrapper.SetCallback(delegate(Bitmap frame) 
          { 
           if (_mainContentSurface == null || _dead) 
            return; 

           var bmpData = frame.LockBits(new Rectangle(0, 0, frame.Width, frame.Height), ImageLockMode.ReadOnly, frame.PixelFormat); 
           var ptr = bmpData.Scan0; 

           var size = bmpData.Stride * frame.Height; 
           _mainContentSurface.Buffer = new byte[size]; 

           System.Runtime.InteropServices.Marshal.Copy(ptr, _mainContentSurface.Buffer, 0, size); 

           _mainContentSurface.SetTexture(_mainContentSurface.Buffer, frame.Width, frame.Height); 
           _secondaryContentSurface.SetTexture(_mainContentSurface.Buffer, frame.Width, frame.Height); // same buffer to second WINDOW 

           _mainContentSurface.VideoFrameRate.Value =_videoWrapper.ActualFrameRate; 

           frame.UnlockBits(bmpData); 
          }); 

這裏是我的SetTexture和紋理映射的實際使用情況，以方：

public void SetTexture(byte[] image, int width, int height) 
{ 
    if (Context9 != null && Context9.Device != null) 
    { 
     if (IsFormClosed) 
      return; 

     // rendering is seperate from the "FRAME FETCH" thread, if it makes sense. 
     // also note that we recreate video texture if needed. 
     _renderWindow.BeginInvoke(new Action(() => 
           { 
            if (_image == null || _currentVideoTextureWidth != width || _currentVideoTextureHeight != height) 
            { 
             if(_image != null) 
              _image.Dispose(); 

             _image = new Texture(Context9.Device, width, height, 0, Usage.Dynamic, Format.A8R8G8B8, 
                  Pool.Default); 

             _currentVideoTextureWidth = width; 
             _currentVideoTextureHeight = height; 

             if(_image == null) 
              throw new Exception("Video card does not support textures power of TWO or dynamic textures. Get a video card"); 
            } 

            //upload data into texture. 
            var data = _image.LockRectangle(0, LockFlags.None); 
            data.Data.Write(image, 0, image.Length); 
            _image.UnlockRectangle(0); 
           })); 
    } 
} 

最後是實際的渲染：

Context9.Device.SetStreamSource(0, _videoVertices, 0, Vertex.SizeBytes); 
    Context9.Device.VertexFormat = Vertex.Format; 

    // Setup our texture. Using Textures introduces the texture stage states, 
    // which govern how Textures get blended together (in the case of multiple 
    // Textures) and lighting information. 
    Context9.Device.SetTexture(0, _image); 

    // The sampler states govern how smooth the texture is displayed. 
    Context9.Device.SetSamplerState(0, SamplerState.MinFilter, TextureFilter.Linear); 
    Context9.Device.SetSamplerState(0, SamplerState.MagFilter, TextureFilter.Linear); 
    Context9.Device.SetSamplerState(0, SamplerState.MipFilter, TextureFilter.Linear); 

    // Now drawing 2 triangles, for a quad. 
    Context9.Device.DrawPrimitives(PrimitiveType.TriangleList, 0, 2); 

現在，它的工作原理在我的機器上。沒有什麼問題。隨着每個視頻文件和每個位置。但是當我檢查WinXP時，照片被完全破壞了。這是非工作和工作的屏幕快照;

http://www.upload.ee/image/2941734/untitled.PNG

http://www.upload.ee/image/2941762/Untitled2.png

注意，在第一張圖片，他們是_maincontentSurface和_secondaryContentSurface。有誰知道可能是什麼問題？

Answer 1

您無需每次都重新創建你的紋理，只是將其創建爲動態：

this.Texture = new Texture(device, w, h, 1, Usage.Dynamic, Format.X8R8G8B8, Pool.Default); 

關於拷貝的問題可能來自步幅（行長度可能會有所不同，因爲它是填充）：

得到紋理的行間距：

public int GetRowPitch() 
    { 
     if (rowpitch == -1) 
     { 
      DataRectangle dr = this.Texture.LockRectangle(0, LockFlags.Discard); 
      this.rowpitch = dr.Pitch; 
      this.Texture.UnlockRectangle(0); 
     } 
     return rowpitch; 
    } 

如果你的紋理行間距等於你的幀間距，您可以複製你的方式做，否則你可以這樣來做：

public void WriteDataPitch(IntPtr ptr, int len) 
    { 
     DataRectangle dr = this.Texture.LockRectangle(0, LockFlags.Discard); 

     int pos = 0; 
     int stride = this.Width * 4; 

     byte* data = (byte*)ptr.ToPointer(); 
     for (int i = 0; i < this.Height; i++) 
     { 
      dr.Data.WriteRange((IntPtr)data, this.Width * 4); 

      pos += dr.Pitch; 
      dr.Data.Position = pos; 
      data += stride; 
     } 
     this.Texture.UnlockRectangle(0); 
    } 

如果你想完全工作的VLC播放器slimdx讓我知道的一個例子得到了各地（需要很好地包起來）