FFmpeg
hpeldsp_vp3_init.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 "libavutil/attributes.h"
20 #include "libavutil/cpu.h"
21 #include "libavutil/x86/cpu.h"
22 
23 #include "libavcodec/avcodec.h"
24 #include "libavcodec/hpeldsp.h"
25 
26 #include "hpeldsp.h"
27 
29  const uint8_t *pixels,
30  ptrdiff_t line_size, int h);
32  const uint8_t *pixels,
33  ptrdiff_t line_size, int h);
35  const uint8_t *pixels,
36  ptrdiff_t line_size, int h);
38  const uint8_t *pixels,
39  ptrdiff_t line_size, int h);
40 
42 {
43  if (EXTERNAL_AMD3DNOW(cpu_flags)) {
44  if (flags & AV_CODEC_FLAG_BITEXACT) {
47  }
48  }
49 
50  if (EXTERNAL_MMXEXT(cpu_flags)) {
51  if (flags & AV_CODEC_FLAG_BITEXACT) {
54  }
55  }
56 }
static atomic_int cpu_flags
Definition: cpu.c:50
Macro definitions for various function/variable attributes.
The exact code depends on how similar the blocks are and how related they are to the block
uint8_t
#define av_cold
Definition: attributes.h:82
void ff_put_no_rnd_pixels8_x2_exact_3dnow(uint8_t *block, const uint8_t *pixels, ptrdiff_t line_size, int h)
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
av_cold void ff_hpeldsp_vp3_init_x86(HpelDSPContext *c, int cpu_flags, int flags)
void ff_put_no_rnd_pixels8_y2_exact_3dnow(uint8_t *block, const uint8_t *pixels, ptrdiff_t line_size, int h)
Half-pel DSP context.
Definition: hpeldsp.h:45
#define AV_CODEC_FLAG_BITEXACT
Use only bitexact stuff (except (I)DCT).
Definition: avcodec.h:926
Half-pel DSP functions.
void ff_put_no_rnd_pixels8_x2_exact_mmxext(uint8_t *block, const uint8_t *pixels, ptrdiff_t line_size, int h)
Libavcodec external API header.
op_pixels_func put_no_rnd_pixels_tab[4][4]
Halfpel motion compensation with no rounding (a+b)>>1.
Definition: hpeldsp.h:82
#define flags(name, subs,...)
Definition: cbs_av1.c:564
#define EXTERNAL_MMXEXT(flags)
Definition: cpu.h:57
int pixels
Definition: avisynth_c.h:390
void ff_put_no_rnd_pixels8_y2_exact_mmxext(uint8_t *block, const uint8_t *pixels, ptrdiff_t line_size, int h)
#define EXTERNAL_AMD3DNOW(flags)
Definition: cpu.h:54