请问谁知道用ddraw直接在窗口中显示yuv数据的方法，本人愿为该问题出500分专家分，谢谢！

[jsfun]

请给出具体的方法，最好有相关的源代码或者相关资料网页，谢谢！

我的油箱是[e-mail]

[jsfun]

高手快来赐招！

[aoosang]

RGB 2 YUV"? 不明白,顶帖

[nonocast]

inline UINT Trunc(UINT value)
{ return ((int) value) < 0 ? 0 : ((int) value) > 0xff00 ? 0xff00 : value; }
void CColorSpaceConvetor::YUV2RGB(BYTE * pDest, BYTE * pSrc, DWORD dwRGBBit,
DWORD dwDestPitch, DWORD dwSrcPitch,
int nHeight, UINT nWidth)
{
UINT nLength = nWidth * ((dwRGBBit + 7) / 8);
if (nHeight <= 0)
{
nHeight = -nHeight;
switch (dwRGBBit)
{
case 16:
{
for (UINT i = 0; i < (UINT) nHeight; i++)
{
for (UINT j = 0, k = 0; j < nLength; j += 4, k += 4)
{
UINT y = pSrc[k];
UINT u = pSrc[k+1];
UINT v = pSrc[k+3];
UINT n1=511*u-6*v-64522;
UINT n2=48838-125*u-255*v;
UINT n3=506*v-u-64522;
UINT b = Trunc((y << 8) + n1) >> 11;
UINT g = Trunc((y << 8) + n2) >> 10;
UINT r = Trunc((y << 8) + n3) >> 11;
*(WORD*)(pDest + j) = (WORD) ((r << 11) | (g << 5) | b);
y = pSrc[k+2];
b = Trunc((y << 8) + n1) >> 11;
g = Trunc((y << 8) + n2) >> 10;
r = Trunc((y << 8) + n3) >> 11;
*(WORD*)(pDest + j + 2) = (WORD) ((r << 11) | (g << 5) | b);
}
pSrc += dwSrcPitch;
pDest += dwDestPitch;
}
}
break;

}
}
else
{
pDest += (nHeight - 1) * dwDestPitch;
switch (dwRGBBit)
{
case 16:
{
for (UINT i = 0; i < (UINT) nHeight; i++)
{
for (UINT j = 0, k = 0; j < nLength; j += 4, k += 4)
{
UINT y = pSrc[k];
UINT u = pSrc[k+1];
UINT v = pSrc[k+3];
UINT b = Trunc((y << 8) + 511 * u - 6 * v - 64522) >> 11;
UINT g = Trunc((y << 8) - 125 * u - 255 * v + 48838) >> 10;
UINT r = Trunc((y << 8) - u + 506 * v - 64522) >> 11;
*(WORD*)(pDest + j) = (WORD) ((r << 11) | (g << 5) | b);
y = pSrc[k+2];
b = Trunc((y << 8) + 511 * u - 6 * v - 64522) >> 11;
g = Trunc((y << 8) - 125 * u - 255 * v + 48838) >> 10;
r = Trunc((y << 8) - u + 506 * v - 64522) >> 11;
*(WORD*)(pDest + j + 2) = (WORD) ((r << 11) | (g << 5) | b);
}
pSrc += dwSrcPitch;
pDest -= dwDestPitch;
}
}
break;

}
}}

[nonocast]

我这有个yuv的播放器，但没有源码
还有你可以参考一下sf.net中的xine项目，里面专门有yuv播放的那块

[nonocast]

/************************************************************************
*
* yuvrgb24.c, colour space conversion for tmndecode (H.263 decoder)
* Copyright (C) 1996 Telenor R&D, Norway
* Karl Olav Lillevold <[e-mail]>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* Karl Olav Lillevold <[e-mail]>
* Telenor Research and Development
* P.O.Box 83 tel.: [phone]
* N-2007 Kjeller, Norway fax.: [phone]
*
* Robert Danielsen e-mail: [e-mail]
* Telenor Research and Development www: http://www.nta.no/brukere/DVC/
* P.O.Box 83 tel.: [phone]
* N-2007 Kjeller, Norway fax.: [phone]
*
************************************************************************/

#include "DGlobal.h"


/* Data for ConvertYUVtoRGB*/


long int crv_tab[256];
long int cbu_tab[256];
long int cgu_tab[256];

long int cgv_tab[256];
long int tab_76309[256];


/**
* Init Routine...
* This must be invoked only once before calling conversion routine
*/

void init_dither_tab()
{
long int crv,cbu,cgu,cgv;
int i;

crv = 104597; cbu = 132201; /* fra matrise i global.h */
cgu = 25675; cgv = 53279;

for (i = 0; i < 256; i++) {
crv_tab[i] = (i-128) * crv;
cbu_tab[i] = (i-128) * cbu;
cgu_tab[i] = (i-128) * cgu;
cgv_tab[i] = (i-128) * cgv;
tab_76309[i] = 76309*(i-16);
}
}



/**********************************************************************
*
* Name: ConvertYUVtoRGB
* Description: Converts YUV image to RGB (packed mode)
*
* Input: pointer to source luma, Cr, Cb, destination,
* image width and height
* Returns:
* Side effects:
*
* Date: 951208 Author: [e-mail]
*
***********************************************************************/



void ConvertYUVtoRGB(unsigned char *src0,unsigned char *src1,unsigned char *src2,unsigned char *dst_ori,int width,int height)
{
extern long int crv_tab[];
extern long int cbu_tab[];
extern long int cgu_tab[];

extern long int cgv_tab[];
extern long int tab_76309[];

int y11,y21;
int y12,y22;
int y13,y23;
int y14,y24;
int u,v;
int i,j;
int c11, c21, c31, c41;
int c12, c22, c32, c42;
unsigned int DW;
unsigned int *id1, *id2;
unsigned char *py1,*py2,*pu,*pv;
unsigned char *d1, *d2;

d1 = dst_ori;
d1 += width*height*3 - width*3;
d2 = d1 - width*3;

py1 = src0; pu = src1; pv = src2;
py2 = py1 + width;

id1 = (unsigned int *)d1;
id2 = (unsigned int *)d2;

for (j = 0; j < height; j += 2) {
/* line j + 0 */
for (i = 0; i < width; i += 4) {
u = *pu++;
v = *pv++;
c11 = crv_tab[v];
c21 = cgu_tab[u];
c31 = cgv_tab[v];
c41 = cbu_tab[u];
u = *pu++;
v = *pv++;
c12 = crv_tab[v];
c22 = cgu_tab[u];
c32 = cgv_tab[v];
c42 = cbu_tab[u];

y11 = tab_76309[*py1++]; /* (255/219)*65536 */
y12 = tab_76309[*py1++];
y13 = tab_76309[*py1++]; /* (255/219)*65536 */
y14 = tab_76309[*py1++];

y21 = tab_76309[*py2++];
y22 = tab_76309[*py2++];
y23 = tab_76309[*py2++];
y24 = tab_76309[*py2++];

/* RGBR*/
DW = ((clp[(y11 + c41)>>16])) |
((clp[(y11 - c21 - c31)>>16])<<8) |
((clp[(y11 + c11)>>16])<<16) |
((clp[(y12 + c41)>>16])<<24);
*id1++ = DW;

/* GBRG*/
DW = ((clp[(y12 - c21 - c31)>>16])) |
((clp[(y12 + c11)>>16])<<8) |
((clp[(y13 + c42)>>16])<<16) |
((clp[(y13 - c22 - c32)>>16])<<24);
*id1++ = DW;

/* BRGB*/
DW = ((clp[(y13 + c12)>>16])) |
((clp[(y14 + c42)>>16])<<8) |
((clp[(y14 - c22 - c32)>>16])<<16) |
((clp[(y14 + c12)>>16])<<24);
*id1++ = DW;

/* RGBR*/
DW = ((clp[(y21 + c41)>>16])) |
((clp[(y21 - c21 - c31)>>16])<<8) |
((clp[(y21 + c11)>>16])<<16) |
((clp[(y22 + c41)>>16])<<24);
*id2++ = DW;

/* GBRG*/
DW = ((clp[(y22 - c21 - c31)>>16])) |
((clp[(y22 + c11)>>16])<<8) |
((clp[(y23 + c42)>>16])<<16) |
((clp[(y23 - c22 - c32)>>16])<<24);
*id2++ = DW;

/* BRGB*/
DW = ((clp[(y23 + c12)>>16])) |
((clp[(y24 + c42)>>16])<<8) |
((clp[(y24 - c22 - c32)>>16])<<16) |
((clp[(y24 + c12)>>16])<<24);
*id2++ = DW;
}
id1 -= (9 * width)>>2;
id2 -= (9 * width)>>2;
py1 += width;
py2 += width;
}
}

[jsfun]

感谢各位高手的赐教，可能是我没说清楚，我想大家可能没有明白我的意思，我的意思是如何利用DDRAW直接播放YUV数据，而不是先转换为RGB格式再播放，请各位再赐教！谢谢！

[DentistryDoctor]

创建一个Overlay平面，Lock/将数据写到Overlay平面/Unlock

[DentistryDoctor]

DDSURFACEDESC ddsd;
static DDPIXELFORMAT ddpf = {sizeof(DDPIXELFORMAT), DDPF_FOURCC, MAKEFOURCC('Y','U','Y','V'),0,0,0,0,0};
ZeroMemory(&ddsd, sizeof(ddsd));
ddsd.dwSize = sizeof(ddsd);
ddsd.dwFlags = DDSD_CAPS | DDSD_WIDTH | DDSD_HEIGHT | DDSD_PIXELFORMAT;
ddsd.dwWidth = nWidth;
ddsd.dwHeight = nHeight;
ddsd.ddpfPixelFormat = ddpf;
ddsd.ddsCaps.dwCaps = DDSCAPS_OVERLAY|DDSCAPS_HWCODEC;
CHECK_DDERR(m_pDD->CreateSurface(&ddsd, &m_pOverlay, NULL));

[jsfun]

谢谢上面的仁兄，请问有没有具体的参考例子或者网页之类的，谢谢！
油箱：[e-mail]

[DentistryDoctor]

if(FAILED(m_pOverlay->Lock((LPRECT)rc, &ddsd, DDLOCK_WRITEONLY | DDLOCK_SURFACEMEMORYPTR, 0)))return FALSE;
//Write data to Overlay surface(pDest) use CopyMemory
BYTE * pDest = (BYTE*) ddsd.lpSurface;
BYTE * pSrc = ...
if(pSrc!=NULL)
{
DWORD dwLength=nWidth*2;
for (UINT i = 0; i < dwHeight; i++)
{
CopyMemory(pDest, pSrc, dwLength);
pDest += ddsd.lPitch;
pSrc += dwLength;
}
}
m_pOverlay->Unlock(ddsd.lpSurface);

[jsfun]

谢谢上面仁兄的解答，我先按照你说的方法试一下，还有两个问题向你请教一下：
1.是否可以在不建立OVERLAY表面的情况下，也可以用DDRAW直接显示YUV数据？我最开始没有建立OVERLAY表面，只是建立了一个OFF SCREEN表面，向OFF SCREEN表面写数据，然后再BLT到主表面上，但不知为什么，做了很久都没有成功，图象总是不太正常，但有图象的轮廓和大致的图象效果，是不是我那个地方还没有操作正确，请问我这种不建立OVERLAY表面的方法可行吗？
2.我感到很奇怪，我把计算机的颜色位数分别设为16位和32位，显示出来的图象效果完全不一样，难道YUV数据的显示也跟RGB数据的显示一样与计算机颜色深度有关？请问有没有这种说法？如果有，那么YUV数据的显示在什么地方可以设置颜色深度？

[DentistryDoctor]

1.不创建Overlay平面的情况显示YUV?没做过，估计不能。
2.可能问题出现在RGB2YUV（RGB转换成YUV）.

[jsfun]

哦，我的问题二是说用DDRAW直接显示YUV数据时，图象的显示效果是否与计算机的颜色深度有关？我的YUV数据是直接通过摄像头拿到的YUV数据，是正确的，而不是由RGB数据转换过来的，所以不存在转换错误的情况。如果有关，那么在什么地方可以设置？

[jsfun]

to : DentistryDoctor(My heart will fly,in the sky.)
呵呵，我按照你的方法做了，但不知为什么，OVERLAY表面始终无法建立成功，请问可能出现的原因是什么？我想问一下，建立OVERLAY表面的方式还需不需要先建立一个主表面？是不是只建立一个OVERLAY表面就可以正常显示YUV数据了？

[jsfun]

to ： DentistryDoctor(My heart will fly,in the sky.)
你能不能把你的DDRAW显示YUV数据的程序发给我参考一下，非常感谢！

[pf1685]

我觉得不创建OVERLAY表面,用OFF SCREEN表面也可以,但关键需要注意YUV数据格式应该与计算机的颜色位数配对,还需要注意你的显卡支持那些YUV格式,这只是我个人认为,呵呵,不知说得对不?
顶一下,高手继续解答!

[jsfun]

谢谢pf1685大哥的回答,但是我现在就是不知道YUV数据在OVERLAY或者OFF SCREEN表面上应该怎样放置.
假设我的计算机颜色位数是16位,我的YUV数据为4:2:0,请问我应该按照怎样的顺序或者怎样的规则将我的YUV数据存放到我建立的表面上?Y,U,V三个分量的位置是怎么样的?
谢谢,望高手点拔一下!

[2025‘someday]

好问题，顶一下吧

[寻开心]

yuv格式在ddraw当中必须是overlay表面上才能直接显示，否则就要经过到rgb的转换才行

能够直接显示yuv的必须是支持它的设备，内部或者显存当中的表面不行

[easyrock]

目前的硬件都支持直接把YUV的数据直接blt到主表面，或者Overlay表面。支持的格式最起码有YUY2和UYVY。
你只要看看显卡DDraw7的能力中有没有Blt FourCC一项就知道能不能这样做了。