1 /* DirectShow capture services (QCAP.DLL)
3 * Copyright 2005 Maarten Lankhorst
5 * This file contains the part of the vfw capture interface that
6 * does the actual Video4Linux(1/2) stuff required for capturing
7 * and setting/getting media format..
9 * This library is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU Lesser General Public
11 * License as published by the Free Software Foundation; either
12 * version 2.1 of the License, or (at your option) any later version.
14 * This library is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * Lesser General Public License for more details.
19 * You should have received a copy of the GNU Lesser General Public
20 * License along with this library; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
29 #include "qcap_main.h"
30 #include "wine/debug.h"
32 WINE_DEFAULT_DEBUG_CHANNEL(qcap);
34 static int yuv_xy[256]; /* Gray value */
35 static int yuv_gu[256]; /* Green U */
36 static int yuv_bu[256]; /* Blue U */
37 static int yuv_rv[256]; /* Red V */
38 static int yuv_gv[256]; /* Green V */
39 static int initialised = 0;
41 static inline int ValidRange(int in) {
42 if (in > 255) in = 255;
48 #if 0 /* For some reason I have to revert R and B, not sure why */
49 unsigned char r, g, b;
51 unsigned char b, g, r;
55 static inline void YUV2RGB(const unsigned char y_, const unsigned char cb, const unsigned char cr, RGB* retval) {
56 retval->r = ValidRange(yuv_xy[y_] + yuv_rv[cr]);
57 retval->g = ValidRange(yuv_xy[y_] + yuv_gu[cb] + yuv_gv[cr]);
58 retval->b = ValidRange(yuv_xy[y_] + yuv_bu[cb]);
65 if (initialised++) return;
67 for (y_ = 0; y_ <= 255; y_++)
69 y = ((float) 255 / 219) * (y_ - 16);
70 yuv_xy[y_] = ValidRange((int) (y));
73 for (cb = 0; cb <= 255; cb++)
75 u = ((float) 255 / 224) * (cb - 128);
76 yuv_gu[cb] = - ValidRange((int) (0.344 * u));
77 yuv_bu[cb] = ValidRange((int) (1.772 * u));
80 for (cr = 0; cr <= 255; cr++)
82 v = ((float) 255 / 224) * (cr - 128);
83 yuv_rv[cr] = ValidRange((int) (1.402 * v));
84 yuv_gv[cr] = - ValidRange((int) (0.714 * v));
86 TRACE("Filled hash table\n");
89 static void Parse_YUYV(unsigned char *destbuffer, const unsigned char *input, int width, int height)
91 const unsigned char *pY, *pCb, *pCr;
92 int togo = width * height / 2;
97 YUV2RGB(*pY, *pCb, *pCr, (RGB *)destbuffer);
98 pY += 2; destbuffer += 3;
99 YUV2RGB(*pY, *pCb, *pCr, (RGB *)destbuffer);
100 pY += 2; pCb += 4; pCr += 4; destbuffer += 3;
104 static void Parse_UYVY(unsigned char *destbuffer, const unsigned char *input, int width, int height)
106 const unsigned char *pY, *pCb, *pCr;
107 int togo = width * height / 2;
112 YUV2RGB(*pY, *pCb, *pCr, (RGB *)destbuffer);
113 pY += 2; destbuffer += 3;
114 YUV2RGB(*pY, *pCb, *pCr, (RGB *)destbuffer);
115 pY += 2; pCb += 4; pCr += 4; destbuffer += 3;
119 static void Parse_UYYVYY(unsigned char *destbuffer, const unsigned char *input, int width, int height)
121 const unsigned char *pY, *pCb, *pCr;
122 int togo = width * height / 4;
127 YUV2RGB(*pY, *pCb, *pCr, (RGB *)destbuffer);
128 destbuffer += 3; pY++;
129 YUV2RGB(*pY, *pCb, *pCr, (RGB *)destbuffer);
130 pY += 2; destbuffer += 3;
131 YUV2RGB(*pY, *pCb, *pCr, (RGB *)destbuffer);
132 destbuffer += 3; pY++;
133 YUV2RGB(*pY, *pCb, *pCr, (RGB *)destbuffer);
134 pY += 2; pCb += 6; pCr += 6; destbuffer += 3;
138 static void Parse_PYUV(unsigned char *destbuffer, const unsigned char *input, int width, int height, int wstep, int hstep)
140 /* We have 3 pointers, One to Y, one to Cb and 1 to Cr */
142 /* C19 *89* declaration block (Grr julliard for not allowing C99) */
144 const unsigned char *pY, *pCb, *pCr;
145 int swstep = 0, shstep = 0;
146 int ypos = 0, xpos = 0;
147 int indexUV = 0, cUv;
150 ysize = width * height;
151 uvsize = (width / wstep) * (height / hstep);
155 /* Bottom down DIB */
159 for (xpos = 0; xpos < width; xpos++) {
160 YUV2RGB(*(pY++), pCb[cUv], pCr[cUv], (RGB *)destbuffer);
162 if (++swstep == wstep) {
167 if (++shstep == hstep) {
171 } while (++ypos < height);
174 void YUV_To_RGB24(enum YUV_Format format, unsigned char *target, const unsigned char *source, int width, int height) {
176 if (format < ENDPLANAR) {
178 case YUVP_421: wstep = 2; hstep = 1; break;
179 case YUVP_422: wstep = 2; hstep = 2; break;
180 case YUVP_441: wstep = 4; hstep = 1; break;
181 case YUVP_444: wstep = 4; hstep = 4; break;
182 default: ERR("Unhandled format \"%d\"\n", format); return;
184 Parse_PYUV(target, source, width, height, wstep, hstep);
187 case YUYV: Parse_YUYV(target, source, width, height); return;
188 case UYVY: Parse_UYVY(target, source, width, height); return;
189 case UYYVYY: Parse_UYYVYY(target, source, width, height); return;
190 default: ERR("Unhandled format \"%d\"\n", format); return;