FFmpeg
svq1encdsp.h
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1 /*
2  * SVQ1 encoder DSP
3  *
4  * This file is part of FFmpeg.
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 #ifndef AVCODEC_SVQ1ENCDSP_H
22 #define AVCODEC_SVQ1ENCDSP_H
23 
24 #include <stdint.h>
25 
26 #include "config.h"
27 
28 typedef struct SVQ1EncDSPContext {
29  int (*ssd_int8_vs_int16)(const int8_t *pix1, const int16_t *pix2,
30  intptr_t size);
32 
36 
37 static int ssd_int8_vs_int16_c(const int8_t *pix1, const int16_t *pix2,
38  intptr_t size)
39 {
40  int score = 0;
41 
42  for (intptr_t i = 0; i < size; i++)
43  score += (pix1[i] - pix2[i]) * (pix1[i] - pix2[i]);
44  return score;
45 }
46 
47 static inline void ff_svq1enc_init(SVQ1EncDSPContext *c)
48 {
49  c->ssd_int8_vs_int16 = ssd_int8_vs_int16_c;
50 
51 #if ARCH_PPC
53 #elif ARCH_RISCV
55 #elif ARCH_X86
57 #endif
58 }
59 
60 #endif /* AVCODEC_SVQ1ENCDSP_H */
SVQ1EncDSPContext::ssd_int8_vs_int16
int(* ssd_int8_vs_int16)(const int8_t *pix1, const int16_t *pix2, intptr_t size)
Definition: svq1encdsp.h:29
ssd_int8_vs_int16_c
static int ssd_int8_vs_int16_c(const int8_t *pix1, const int16_t *pix2, intptr_t size)
Definition: svq1encdsp.h:37
ff_svq1enc_init
static void ff_svq1enc_init(SVQ1EncDSPContext *c)
Definition: svq1encdsp.h:47
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
size
int size
Definition: twinvq_data.h:10344
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:256
ff_svq1enc_init_x86
void ff_svq1enc_init_x86(SVQ1EncDSPContext *c)
Definition: svq1enc_init.c:30
ff_svq1enc_init_riscv
void ff_svq1enc_init_riscv(SVQ1EncDSPContext *c)
Definition: svqenc_init.c:30
SVQ1EncDSPContext
Definition: svq1encdsp.h:28
ff_svq1enc_init_ppc
void ff_svq1enc_init_ppc(SVQ1EncDSPContext *c)
Definition: svq1enc_altivec.c:74