fixed symetric quantization (better quality!)
[libav.git] / libavcodec / dsputil.h
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1#ifndef DSPUTIL_H
2#define DSPUTIL_H
3
4#include "common.h"
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5
6/* dct code */
7typedef short DCTELEM;
8
9void jpeg_fdct_ifast (DCTELEM *data);
10
11void j_rev_dct (DCTELEM *data);
12
13void fdct_mmx(DCTELEM *block);
14
15void (*av_fdct)(DCTELEM *block);
16
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17/* encoding scans */
18extern UINT8 ff_alternate_horizontal_scan[64];
19extern UINT8 ff_alternate_vertical_scan[64];
20extern UINT8 zigzag_direct[64];
21
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22/* pixel operations */
23#define MAX_NEG_CROP 384
24
25/* temporary */
26extern UINT32 squareTbl[512];
0cfa9713 27extern UINT8 cropTbl[256 + 2 * MAX_NEG_CROP];
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28
29void dsputil_init(void);
30
31/* pixel ops : interface with DCT */
32
4af7bcc1 33extern void (*ff_idct)(DCTELEM *block);
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34extern void (*get_pixels)(DCTELEM *block, const UINT8 *pixels, int line_size);
35extern void (*put_pixels_clamped)(const DCTELEM *block, UINT8 *pixels, int line_size);
36extern void (*add_pixels_clamped)(const DCTELEM *block, UINT8 *pixels, int line_size);
37
38void get_pixels_c(DCTELEM *block, const UINT8 *pixels, int line_size);
39void put_pixels_clamped_c(const DCTELEM *block, UINT8 *pixels, int line_size);
40void add_pixels_clamped_c(const DCTELEM *block, UINT8 *pixels, int line_size);
41
42/* add and put pixel (decoding) */
43typedef void (*op_pixels_func)(UINT8 *block, const UINT8 *pixels, int line_size, int h);
44
45extern op_pixels_func put_pixels_tab[4];
46extern op_pixels_func avg_pixels_tab[4];
47extern op_pixels_func put_no_rnd_pixels_tab[4];
48extern op_pixels_func avg_no_rnd_pixels_tab[4];
49
50/* sub pixel (encoding) */
51extern void (*sub_pixels_tab[4])(DCTELEM *block, const UINT8 *pixels, int line_size, int h);
52
53#define sub_pixels_2(block, pixels, line_size, dxy) \
54 sub_pixels_tab[dxy](block, pixels, line_size, 8)
55
56/* motion estimation */
57
58typedef int (*op_pixels_abs_func)(UINT8 *blk1, UINT8 *blk2, int line_size, int h);
59
60extern op_pixels_abs_func pix_abs16x16;
61extern op_pixels_abs_func pix_abs16x16_x2;
62extern op_pixels_abs_func pix_abs16x16_y2;
63extern op_pixels_abs_func pix_abs16x16_xy2;
64
65int pix_abs16x16_c(UINT8 *blk1, UINT8 *blk2, int lx, int h);
66int pix_abs16x16_x2_c(UINT8 *blk1, UINT8 *blk2, int lx, int h);
67int pix_abs16x16_y2_c(UINT8 *blk1, UINT8 *blk2, int lx, int h);
68int pix_abs16x16_xy2_c(UINT8 *blk1, UINT8 *blk2, int lx, int h);
69
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70static inline int block_permute_op(int j)
71{
72 return (j & 0x38) | ((j & 6) >> 1) | ((j & 1) << 2);
73}
74
75void block_permute(INT16 *block);
76
3d03c0a2 77#if defined(HAVE_MMX)
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78
79#define MM_MMX 0x0001 /* standard MMX */
80#define MM_3DNOW 0x0004 /* AMD 3DNOW */
81#define MM_MMXEXT 0x0002 /* SSE integer functions or AMD MMX ext */
82#define MM_SSE 0x0008 /* SSE functions */
83#define MM_SSE2 0x0010 /* PIV SSE2 functions */
84
85extern int mm_flags;
86
87int mm_support(void);
88
89static inline void emms(void)
90{
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91 __asm __volatile ("emms;":::"memory");
92}
93
94#define emms_c() \
95{\
96 if (mm_flags & MM_MMX)\
97 emms();\
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98}
99
100#define __align8 __attribute__ ((aligned (8)))
101
102void dsputil_init_mmx(void);
103
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104#elif defined(ARCH_ARMV4L)
105
106#define emms_c()
107
108/* This is to use 4 bytes read to the IDCT pointers for some 'zero'
109 line ptimizations */
110#define __align8 __attribute__ ((aligned (4)))
111
112void dsputil_init_armv4l(void);
113
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114#else
115
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116#define emms_c()
117
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118#define __align8
119
120#endif
121
122#endif