FFmpeg
exrdsp.c
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1 /*
2  * This file is part of FFmpeg.
3  *
4  * Copyright (c) 2006 Industrial Light & Magic, a division of Lucas Digital Ltd. LLC
5  *
6  * FFmpeg is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * FFmpeg is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with FFmpeg; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20 
21 #include <stdint.h>
22 
23 #include "libavutil/attributes.h"
24 #include "exrdsp.h"
25 #include "config.h"
26 
27 static void reorder_pixels_scalar(uint8_t *dst, const uint8_t *src, ptrdiff_t size)
28 {
29  const uint8_t *t1 = src;
30  int half_size = size / 2;
31  const uint8_t *t2 = src + half_size;
32  uint8_t *s = dst;
33  int i;
34 
35  for (i = 0; i < half_size; i++) {
36  *(s++) = *(t1++);
37  *(s++) = *(t2++);
38  }
39 }
40 
41 static void predictor_scalar(uint8_t *src, ptrdiff_t size)
42 {
43  ptrdiff_t i;
44 
45  for (i = 1; i < size; i++)
46  src[i] += src[i-1] - 128;
47 }
48 
50 {
53 
54  if (ARCH_X86)
56 }
#define src
Definition: vp8dsp.c:254
static void predictor_scalar(uint8_t *src, ptrdiff_t size)
Definition: exrdsp.c:41
Macro definitions for various function/variable attributes.
void(* predictor)(uint8_t *src, ptrdiff_t size)
Definition: exrdsp.h:27
uint8_t
#define av_cold
Definition: attributes.h:82
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
ptrdiff_t size
Definition: opengl_enc.c:100
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:259
#define t1
Definition: regdef.h:29
#define s(width, name)
Definition: cbs_vp9.c:257
static void reorder_pixels_scalar(uint8_t *dst, const uint8_t *src, ptrdiff_t size)
Definition: exrdsp.c:27
void ff_exrdsp_init_x86(ExrDSPContext *c)
Definition: exrdsp_init.c:35
av_cold void ff_exrdsp_init(ExrDSPContext *c)
Definition: exrdsp.c:49
void(* reorder_pixels)(uint8_t *dst, const uint8_t *src, ptrdiff_t size)
Definition: exrdsp.h:26
#define t2
Definition: regdef.h:30