D3D显示YUV420视频

[么特里亚]

请问下，上个接口已经将视频分别分成Y，U，V，请问下怎么将视频用D3D显示出来
int D3DOffscreenRender::render(unsigned char *py, unsigned char *pu, unsigned char *pv, int width, int height,RECT*srcRect)
希望大家给点经验，首次用D3D替换DDRAW，不懂

[dong364]

你的问题可以从这里解决：http://blog.csdn.net/leixiaohua1020/article/details/40279297

[赵4老师]

顶楼上！

[么特里亚]

引用 2 楼 dong364 的回复:

你的问题可以从这里解决：http://blog.csdn.net/leixiaohua1020/article/details/40279297

我借鉴了这篇文章，并且作了修改

#if 1
	BYTE * pTextureBuffer = NULL;
	LONG  lTexturePitch;     
	D3DLOCKED_RECT d3d_rect;  
    lRet=m_pDirect3DSurfaceRender->LockRect(&d3d_rect,NULL,D3DLOCK_DONOTWAIT);  
    if(FAILED(lRet))  
        return -1;  

	lTexturePitch = d3d_rect.Pitch;
	BYTE *pDest = (BYTE*)d3d_rect.pBits ;
	int i = 0;
	for(i = 0;i < m_height;i ++){
		memcpy(pDest + i * lTexturePitch,py, m_width);
	}
	for(i = 0;i < m_height/2;i ++){
		memcpy(pDest + lTexturePitch * m_height + i * lTexturePitch / 2,pu, m_width / 2);
	}
	for(i = 0;i < m_height/2;i ++){
		memcpy(pDest + lTexturePitch * m_height + lTexturePitch * m_height / 4 + i * lTexturePitch / 2,pv, m_width / 2);
	} 
#endif

但是显示的图像不对

[么特里亚]

#if 1
	BYTE * pTextureBuffer = NULL;
	LONG  lTexturePitch;     
	D3DLOCKED_RECT d3d_rect;  
    lRet=m_pDirect3DSurfaceRender->LockRect(&d3d_rect,NULL,D3DLOCK_DONOTWAIT);  
    if(FAILED(lRet))  
        return -1;  

	lTexturePitch = d3d_rect.Pitch;
	BYTE *pDest = (BYTE*)d3d_rect.pBits ;
	int i = 0;
	for(i = 0;i < m_height;i ++){
		memcpy(pDest + i * lTexturePitch,py, m_width);
	}
	for(i = 0;i < m_height/2;i ++){
		memcpy(pDest + lTexturePitch * m_height + i * lTexturePitch / 2,pu, m_width / 2);
	}
	for(i = 0;i < m_height/2;i ++){
		memcpy(pDest + lTexturePitch * m_height + lTexturePitch * m_height / 4 + i * lTexturePitch / 2,pv, m_width / 2);
	} 
#endif

[赵4老师]

先弄清楚图像每行到底多少个字节，每个像素到底对应几个字节以及这几个字节分别代表什么量还有其取值范围。

[么特里亚]

#if 1
	BYTE * pTextureBuffer = NULL;
	LONG  lTexturePitch;     
	D3DLOCKED_RECT d3d_rect;  
    lRet=m_pDirect3DSurfaceRender->LockRect(&d3d_rect,NULL,D3DLOCK_DONOTWAIT);  
    if(FAILED(lRet))  
        return -1;  

	lTexturePitch = d3d_rect.Pitch;
	BYTE *pDest = (BYTE*)d3d_rect.pBits ;
	int i = 0;
	for(i = 0;i < m_height;i ++){
		memcpy(pDest + i * lTexturePitch,py, m_width);
	}
	for(i = 0;i < m_height/2;i ++){
		memcpy(pDest + lTexturePitch * m_height + i * lTexturePitch / 2,pu, m_width / 2);
	}
	for(i = 0;i < m_height/2;i ++){
		memcpy(pDest + lTexturePitch * m_height + lTexturePitch * m_height / 4 + i * lTexturePitch / 2,pv, m_width / 2);
	}

// 	for(int i = 0;i < surfaceDesc.Height;i ++){  
//         memcpy(pTextureBuffer + i * lTexturePitch,py, surfaceDesc.Width);  
//     }  
//     for(int j = 0;j < (surfaceDesc.Height)/2;j ++){  
//         memcpy(pTextureBuffer + lTexturePitch * (surfaceDesc.Height) + j * lTexturePitch / 2,pu, (surfaceDesc.Width) / 2);  
//     }  
//     for(int k = 0;k < (surfaceDesc.Height)/2;k ++){  
//         memcpy(pTextureBuffer + lTexturePitch * (surfaceDesc.Height) + lTexturePitch * (surfaceDesc.Height) / 4 + k * lTexturePitch / 2,pv, (surfaceDesc.Width) / 2);  
//     }  
#endif
    lRet=m_pDirect3DSurfaceRender->UnlockRect(); 

我试过这样，显示不出来

[dong364]

检查下pu、py、pv，这几个变量每次for都没有递增