在上篇h264解码为yuv12后http://jhlong12345.blog.163.com/blog/static/1230631292015725115058709/
，需要显示出来，使用sdl比较方便，网上没C#的例子，全是C++的，
SDL_LockYUVOverlay(overlay);
memcpy(overlay->pixels[], y_video_data, w * h);
memcpy(overlay->pixels[], u_video_data, w * h / );
memcpy(overlay->pixels[], v_video_data, w * h / );
SDL_UnlockYUVOverlay(overlay);
这里贴出来研究很久才做出来的C#代码
if (H264Dec.Hi264DecAU(_decHandle, pH264Data, frameLen, , ref _decodeFrame, ) == )
{
IntPtr[] ips = new IntPtr[] { _decodeFrame.pY, _decodeFrame.pV,_decodeFrame.pU }; //U（Cb）分量 V（Cr）分量
object obj = Marshal.PtrToStructure(yuv, typeof(Sdl.SDL_Overlay)); //在I420格式中，U平面紧跟在Y平面之后，然后才是V平面（即：YUV）；但YV12则是相反（即：YVU）
Sdl.SDL_Overlay overlayYuv = (Sdl.SDL_Overlay)obj;
Sdl.SDL_LockYUVOverlay(yuv);
GCHandle hObject = GCHandle.Alloc(ips, GCHandleType.Pinned);
IntPtr pObject = hObject.AddrOfPinnedObject();
overlayYuv.pixels = pObject;
Marshal.StructureToPtr(overlayYuv, yuv, true);
Sdl.SDL_UnlockYUVOverlay(yuv);
Sdl.SDL_DisplayYUVOverlay(yuv, ref rect);
//画点文字图形啥的
Sdl.SDL_Flip(surfacePtr);
Sdl.SDL_UpdateRect(surfacePtr, , , rect.w, rect.h);
if (hObject.IsAllocated)
hObject.Free();
}
其中 IntPtr yuv = Sdl.SDL_CreateYUVOverlay(width, height, Sdl.SDL_YV12_OVERLAY, surfacePtr);