3 * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
4 * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
6 * This file is part of FFmpeg.
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.
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.
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
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.
30 #ifndef AVCODEC_DSPUTIL_H
31 #define AVCODEC_DSPUTIL_H
35 extern uint32_t ff_square_tab[512];
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, ...
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 ...
48 * !future video codecs might need functions with less strict alignment
51 struct MpegEncContext;
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. */
57 typedef 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);
64 typedef struct DSPContext {
65 /* pixel ops : interface with DCT */
66 void (*get_pixels)(int16_t *block /* align 16 */,
67 const uint8_t *pixels /* align 8 */,
69 void (*diff_pixels)(int16_t *block /* align 16 */,
70 const uint8_t *s1 /* align 8 */,
71 const uint8_t *s2 /* align 8 */,
73 int (*sum_abs_dctelem)(int16_t *block /* align 16 */);
75 me_cmp_func sad[6]; /* identical to pix_absAxA except additional void * */
77 me_cmp_func hadamard8_diff[6];
78 me_cmp_func dct_sad[6];
79 me_cmp_func quant_psnr[6];
87 me_cmp_func dct_max[6];
88 me_cmp_func dct264_sad[6];
90 me_cmp_func me_pre_cmp[6];
91 me_cmp_func me_cmp[6];
92 me_cmp_func me_sub_cmp[6];
93 me_cmp_func mb_cmp[6];
94 me_cmp_func ildct_cmp[6]; // only width 16 used
95 me_cmp_func frame_skip_cmp[6]; // only width 8 used
97 me_cmp_func pix_abs[2][4];
100 void ff_dsputil_static_init(void);
101 void ff_dsputil_init(DSPContext *p, AVCodecContext *avctx);
102 void avpriv_dsputil_init(DSPContext* p, AVCodecContext *avctx);
103 attribute_deprecated void dsputil_init(DSPContext* c, AVCodecContext *avctx);
105 int ff_check_alignment(void);
107 void ff_set_cmp(DSPContext *c, me_cmp_func *cmp, int type);
109 void ff_dsputil_init_alpha(DSPContext* c, AVCodecContext *avctx);
110 void ff_dsputil_init_arm(DSPContext *c, AVCodecContext *avctx,
111 unsigned high_bit_depth);
112 void ff_dsputil_init_ppc(DSPContext *c, AVCodecContext *avctx,
113 unsigned high_bit_depth);
114 void ff_dsputil_init_x86(DSPContext *c, AVCodecContext *avctx,
115 unsigned high_bit_depth);
117 void ff_dsputil_init_dwt(DSPContext *c);
119 #endif /* AVCODEC_DSPUTIL_H */