1/*
2 * DSP utils
3 * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
4 * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
5 *
6 * This file is part of FFmpeg.
7 *
8 * FFmpeg is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
12 *
13 * FFmpeg is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
16 * Lesser General Public License for more details.
17 *
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with FFmpeg; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 */
22
23/**
24 * @file
25 * DSP utils.
26 * Note, many functions in here may use MMX which trashes the FPU state, it is
27 * absolutely necessary to call emms_c() between DSP & float/double code.
28 */
29
30#ifndef AVCODEC_DSPUTIL_H
31#define AVCODEC_DSPUTIL_H
32
33#include "avcodec.h"
34
35extern uint32_t ff_square_tab[512];
36
37
38/* minimum alignment rules ;)
39 * If you notice errors in the align stuff, need more alignment for some ASM code
40 * for some CPU or need to use a function with less aligned data then send a mail
41 * to the ffmpeg-devel mailing list, ...
42 *
43 * !warning These alignments might not match reality, (missing attribute((align))
44 * stuff somewhere possible).
45 * I (Michael) did not check them, these are just the alignments which I think
46 * could be reached easily ...
47 *
48 * !future video codecs might need functions with less strict alignment
49 */
50
51struct MpegEncContext;
52/* Motion estimation:
53 * h is limited to { width / 2, width, 2 * width },
54 * but never larger than 16 and never smaller than 2.
55 * Although currently h < 4 is not used as functions with
56 * width < 8 are neither used nor implemented. */
57typedef int (*me_cmp_func)(struct MpegEncContext *c,
58                           uint8_t *blk1 /* align width (8 or 16) */,
59                           uint8_t *blk2 /* align 1 */, int line_size, int h);
60
61/**
62 * DSPContext.
63 */
64typedef struct DSPContext {
65    int (*sum_abs_dctelem)(int16_t *block /* align 16 */);
66
67    me_cmp_func sad[6]; /* identical to pix_absAxA except additional void * */
68    me_cmp_func sse[6];
69    me_cmp_func hadamard8_diff[6];
70    me_cmp_func dct_sad[6];
71    me_cmp_func quant_psnr[6];
72    me_cmp_func bit[6];
73    me_cmp_func rd[6];
74    me_cmp_func vsad[6];
75    me_cmp_func vsse[6];
76    me_cmp_func nsse[6];
77    me_cmp_func w53[6];
78    me_cmp_func w97[6];
79    me_cmp_func dct_max[6];
80    me_cmp_func dct264_sad[6];
81
82    me_cmp_func me_pre_cmp[6];
83    me_cmp_func me_cmp[6];
84    me_cmp_func me_sub_cmp[6];
85    me_cmp_func mb_cmp[6];
86    me_cmp_func ildct_cmp[6]; // only width 16 used
87    me_cmp_func frame_skip_cmp[6]; // only width 8 used
88
89    me_cmp_func pix_abs[2][4];
90} DSPContext;
91
92void ff_dsputil_static_init(void);
93void ff_dsputil_init(DSPContext *p, AVCodecContext *avctx);
94void avpriv_dsputil_init(DSPContext* p, AVCodecContext *avctx);
95attribute_deprecated void dsputil_init(DSPContext* c, AVCodecContext *avctx);
96
97int ff_check_alignment(void);
98
99void ff_set_cmp(DSPContext *c, me_cmp_func *cmp, int type);
100
101void ff_dsputil_init_alpha(DSPContext* c, AVCodecContext *avctx);
102void ff_dsputil_init_arm(DSPContext *c, AVCodecContext *avctx);
103void ff_dsputil_init_ppc(DSPContext *c, AVCodecContext *avctx);
104void ff_dsputil_init_x86(DSPContext *c, AVCodecContext *avctx);
105
106void ff_dsputil_init_dwt(DSPContext *c);
107
108#endif /* AVCODEC_DSPUTIL_H */
109