yuv.h revision ffcc3813d82e6b96db79f518f4e67b940a13ce64 
1/***********************************************************
2Copyright (c) 2000, BeOpen.com.
3Copyright (c) 1995-2000, Corporation for National Research Initiatives.
4Copyright (c) 1990-1995, Stichting Mathematisch Centrum.
5All rights reserved.
6
7See the file "Misc/COPYRIGHT" for information on usage and
8redistribution of this file, and for a DISCLAIMER OF ALL WARRANTIES.
9******************************************************************/
10
11#ifndef Py_YUV_H
12#define Py_YUV_H
13#ifdef __cplusplus
14extern "C" {
15#endif
16
17/*
18 * SVideo YUV 4:1:1 format.
19 *
20 * 4 consecutive quadwords describe 8 pixels on 2 lines, as depicted
21 * below.  An array of (width/4) of the below structure describes 2
22 * scan lines.
23 *
24 * +-------------------+
25 * | 00 | 01 | 02 | 03 | . . .
26 * +-------------------+
27 * | 10 | 11 | 12 | 13 | . . .
28 * +-------------------+
29 */
30struct yuv411 {
31	struct {
32		unsigned int dummy:8;
33		unsigned int y0:8;
34		unsigned int u0:2;
35		unsigned int v0:2;
36		unsigned int y1:8;
37		unsigned int u1:2;
38		unsigned int v1:2;
39	} v[4];
40};
41
42#define YUV411_Y00(y)	(y).v[0].y0
43#define YUV411_Y01(y)	(y).v[1].y0
44#define YUV411_Y02(y)	(y).v[2].y0
45#define YUV411_Y03(y)	(y).v[3].y0
46#define YUV411_Y10(y)	(y).v[0].y1
47#define YUV411_Y11(y)	(y).v[1].y1
48#define YUV411_Y12(y)	(y).v[2].y1
49#define YUV411_Y13(y)	(y).v[3].y1
50#define YUV411_U00(y)	((y).v[0].u0<<6|(y).v[1].u0<<4|(y).v[2].u0<<2|(y).v[3].u0)
51#define YUV411_U01(y)	YUV411_U00(y)
52#define YUV411_U02(y)	YUV411_U00(y)
53#define YUV411_U03(y)	YUV411_U00(y)
54#define YUV411_U10(y)	((y).v[0].u1<<6|(y).v[1].u1<<4|(y).v[2].u1<<2|(y).v[3].u1)
55#define YUV411_U11(y)	YUV411_U10(y)
56#define YUV411_U12(y)	YUV411_U10(y)
57#define YUV411_U13(y)	YUV411_U10(y)
58#define YUV411_V00(y)	((y).v[0].v0<<6|(y).v[1].v0<<4|(y).v[2].v0<<2|(y).v[3].v0)
59#define YUV411_V01(y)	YUV411_V00(y)
60#define YUV411_V02(y)	YUV411_V00(y)
61#define YUV411_V03(y)	YUV411_V00(y)
62#define YUV411_V10(y)	((y).v[0].v1<<6|(y).v[1].v1<<4|(y).v[2].v1<<2|(y).v[3].v1)
63#define YUV411_V11(y)	YUV411_V10(y)
64#define YUV411_V12(y)	YUV411_V10(y)
65#define YUV411_V13(y)	YUV411_V10(y)
66
67/*
68 * Compression Library YUV 4:2:2 format.
69 *
70 * 1 longword describes 2 pixels.
71 *
72 * +-------+
73 * | 0 | 1 |
74 * +-------+
75 */
76struct yuv422 {
77	unsigned int u:8;
78	unsigned int y0:8;
79	unsigned int v:8;
80	unsigned int y1:8;
81};
82#define YUV422_Y0(y)	(y).y0
83#define YUV422_Y1(y)	(y).y1
84#define YUV422_U0(y)	(y).u
85#define YUV422_U1(y)	(y).u
86#define YUV422_V0(y)	(y).v
87#define YUV422_V1(y)	(y).v
88
89/*
90 * Compression library YUV 4:2:2 Duplicate Chroma format.
91 *
92 * This is like the previous format, but the U and V values are
93 * duplicated vertically (and hence there is some redundancy in the
94 * data).  With other words, lines 2*n and 2*n+1 have the same U and V
95 * values but different Y values.
96 */
97
98/*
99 * Conversion functions.
100 */
101void yuv_sv411_to_cl422dc(int, void *, void *, int, int);
102void yuv_sv411_to_cl422dc_quartersize(int, void *, void *, int, int);
103void yuv_sv411_to_cl422dc_sixteenthsize(int, void *, void *, int, int);
104
105#ifdef __cplusplus
106}
107#endif
108#endif /* !Py_YUV_H */
109