2 * This file is part of FFmpeg.
4 * FFmpeg is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2.1 of the License, or (at your option) any later version.
9 * FFmpeg is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with FFmpeg; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 #ifndef AVCODEC_ME_CMP_H
20 #define AVCODEC_ME_CMP_H
26 extern uint32_t ff_square_tab
[512];
29 /* minimum alignment rules ;)
30 * If you notice errors in the align stuff, need more alignment for some ASM code
31 * for some CPU or need to use a function with less aligned data then send a mail
32 * to the ffmpeg-devel mailing list, ...
34 * !warning These alignments might not match reality, (missing attribute((align))
35 * stuff somewhere possible).
36 * I (Michael) did not check them, these are just the alignments which I think
37 * could be reached easily ...
39 * !future video codecs might need functions with less strict alignment
42 struct MpegEncContext
;
44 * h is limited to { width / 2, width, 2 * width },
45 * but never larger than 16 and never smaller than 2.
46 * Although currently h < 4 is not used as functions with
47 * width < 8 are neither used nor implemented. */
48 typedef int (*me_cmp_func
)(struct MpegEncContext
*c
,
49 uint8_t *blk1
/* align width (8 or 16) */,
50 uint8_t *blk2
/* align 1 */, ptrdiff_t stride
,
53 typedef struct MECmpContext
{
54 int (*sum_abs_dctelem
)(int16_t *block
/* align 16 */);
56 me_cmp_func sad
[6]; /* identical to pix_absAxA except additional void * */
58 me_cmp_func hadamard8_diff
[6];
59 me_cmp_func dct_sad
[6];
60 me_cmp_func quant_psnr
[6];
68 me_cmp_func dct_max
[6];
69 me_cmp_func dct264_sad
[6];
71 me_cmp_func me_pre_cmp
[6];
72 me_cmp_func me_cmp
[6];
73 me_cmp_func me_sub_cmp
[6];
74 me_cmp_func mb_cmp
[6];
75 me_cmp_func ildct_cmp
[6]; // only width 16 used
76 me_cmp_func frame_skip_cmp
[6]; // only width 8 used
78 me_cmp_func pix_abs
[2][4];
81 void ff_me_cmp_init_static(void);
83 int ff_check_alignment(void);
85 void ff_me_cmp_init(MECmpContext
*c
, AVCodecContext
*avctx
);
86 void ff_me_cmp_init_alpha(MECmpContext
*c
, AVCodecContext
*avctx
);
87 void ff_me_cmp_init_arm(MECmpContext
*c
, AVCodecContext
*avctx
);
88 void ff_me_cmp_init_ppc(MECmpContext
*c
, AVCodecContext
*avctx
);
89 void ff_me_cmp_init_x86(MECmpContext
*c
, AVCodecContext
*avctx
);
91 void ff_set_cmp(MECmpContext
*c
, me_cmp_func
*cmp
, int type
);
93 void ff_dsputil_init_dwt(MECmpContext
*c
);
95 #endif /* AVCODEC_ME_CMP_H */