FFmpeg  4.4.5
idctdsp_init_aarch64.c
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1 /*
2  * ARM-NEON-optimized IDCT functions
3  * Copyright (c) 2008 Mans Rullgard <mans@mansr.com>
4  * Copyright (c) 2017 Matthieu Bouron <matthieu.bouron@gmail.com>
5  *
6  * This file is part of FFmpeg.
7  *
8  * FFmpeg is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU Lesser General Public
10  * License as published by the Free Software Foundation; either
11  * version 2.1 of the License, or (at your option) any later version.
12  *
13  * FFmpeg is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16  * Lesser General Public License for more details.
17  *
18  * You should have received a copy of the GNU Lesser General Public
19  * License along with FFmpeg; if not, write to the Free Software
20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21  */
22 
23 #include "libavutil/attributes.h"
24 #include "libavutil/cpu.h"
25 #include "libavutil/arm/cpu.h"
26 #include "libavcodec/avcodec.h"
27 #include "libavcodec/idctdsp.h"
28 #include "idct.h"
29 
31  unsigned high_bit_depth)
32 {
34 
35  if (have_neon(cpu_flags) && !avctx->lowres && !high_bit_depth) {
36  if (avctx->idct_algo == FF_IDCT_AUTO ||
37  avctx->idct_algo == FF_IDCT_SIMPLEAUTO ||
38  avctx->idct_algo == FF_IDCT_SIMPLENEON) {
39  c->idct_put = ff_simple_idct_put_neon;
40  c->idct_add = ff_simple_idct_add_neon;
41  c->idct = ff_simple_idct_neon;
42  c->perm_type = FF_IDCT_PERM_PARTTRANS;
43  }
44  }
45 }
#define have_neon(flags)
Definition: cpu.h:26
void ff_simple_idct_add_neon(uint8_t *dest, ptrdiff_t line_size, int16_t *data)
void ff_simple_idct_put_neon(uint8_t *dest, ptrdiff_t line_size, int16_t *data)
void ff_simple_idct_neon(int16_t *data)
Macro definitions for various function/variable attributes.
#define av_cold
Definition: attributes.h:88
Libavcodec external API header.
#define FF_IDCT_AUTO
Definition: avcodec.h:1720
#define FF_IDCT_SIMPLEAUTO
Definition: avcodec.h:1733
#define FF_IDCT_SIMPLENEON
Definition: avcodec.h:1731
static atomic_int cpu_flags
Definition: cpu.c:50
int av_get_cpu_flags(void)
Return the flags which specify extensions supported by the CPU.
Definition: cpu.c:95
@ FF_IDCT_PERM_PARTTRANS
Definition: idctdsp.h:42
av_cold void ff_idctdsp_init_aarch64(IDCTDSPContext *c, AVCodecContext *avctx, unsigned high_bit_depth)
main external API structure.
Definition: avcodec.h:536
int idct_algo
IDCT algorithm, see FF_IDCT_* below.
Definition: avcodec.h:1719
int lowres
low resolution decoding, 1-> 1/2 size, 2->1/4 size
Definition: avcodec.h:1754
static double c[64]