FFmpeg
me_cmp_init_aarch64.c
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1 /*
2  * This file is part of FFmpeg.
3  *
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.
8  *
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.
13  *
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
17  */
18 
19 #include <stdint.h>
20 
21 #include "config.h"
22 #include "libavutil/attributes.h"
23 #include "libavutil/aarch64/cpu.h"
24 #include "libavcodec/mpegvideo.h"
25 
26 int ff_pix_abs16_neon(MpegEncContext *s, const uint8_t *blk1, const uint8_t *blk2,
27  ptrdiff_t stride, int h);
28 int ff_pix_abs16_xy2_neon(MpegEncContext *s, const uint8_t *blk1, const uint8_t *blk2,
29  ptrdiff_t stride, int h);
30 int ff_pix_abs16_x2_neon(MpegEncContext *v, const uint8_t *pix1, const uint8_t *pix2,
31  ptrdiff_t stride, int h);
32 
34 {
36 
37  if (have_neon(cpu_flags)) {
38  c->pix_abs[0][0] = ff_pix_abs16_neon;
39  c->pix_abs[0][1] = ff_pix_abs16_x2_neon;
40  c->pix_abs[0][3] = ff_pix_abs16_xy2_neon;
41 
42  c->sad[0] = ff_pix_abs16_neon;
43  }
44 }
ff_pix_abs16_xy2_neon
int ff_pix_abs16_xy2_neon(MpegEncContext *s, const uint8_t *blk1, const uint8_t *blk2, ptrdiff_t stride, int h)
mpegvideo.h
av_get_cpu_flags
int av_get_cpu_flags(void)
Return the flags which specify extensions supported by the CPU.
Definition: cpu.c:101
cpu_flags
static atomic_int cpu_flags
Definition: cpu.c:52
ff_pix_abs16_neon
int ff_pix_abs16_neon(MpegEncContext *s, const uint8_t *blk1, const uint8_t *blk2, ptrdiff_t stride, int h)
av_cold
#define av_cold
Definition: attributes.h:90
s
#define s(width, name)
Definition: cbs_vp9.c:256
MECmpContext
Definition: me_cmp.h:53
ff_pix_abs16_x2_neon
int ff_pix_abs16_x2_neon(MpegEncContext *v, const uint8_t *pix1, const uint8_t *pix2, ptrdiff_t stride, int h)
c
Undefined Behavior In the C some operations are like signed integer dereferencing freed accessing outside allocated Undefined Behavior must not occur in a C it is not safe even if the output of undefined operations is unused The unsafety may seem nit picking but Optimizing compilers have in fact optimized code on the assumption that no undefined Behavior occurs Optimizing code based on wrong assumptions can and has in some cases lead to effects beyond the output of computations The signed integer overflow problem in speed critical code Code which is highly optimized and works with signed integers sometimes has the problem that often the output of the computation does not c
Definition: undefined.txt:32
have_neon
#define have_neon(flags)
Definition: cpu.h:26
attributes.h
ff_me_cmp_init_aarch64
av_cold void ff_me_cmp_init_aarch64(MECmpContext *c, AVCodecContext *avctx)
Definition: me_cmp_init_aarch64.c:33
stride
#define stride
Definition: h264pred_template.c:537
AVCodecContext
main external API structure.
Definition: avcodec.h:398
h
h
Definition: vp9dsp_template.c:2038
cpu.h
MpegEncContext
MpegEncContext.
Definition: mpegvideo.h:62