FFmpeg  4.3.7
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) {
43  }
44  }
45 }
void ff_simple_idct_add_neon(uint8_t *dest, ptrdiff_t line_size, int16_t *data)
static atomic_int cpu_flags
Definition: cpu.c:50
Macro definitions for various function/variable attributes.
#define av_cold
Definition: attributes.h:88
void ff_simple_idct_neon(int16_t *data)
int lowres
low resolution decoding, 1-> 1/2 size, 2->1/4 size
Definition: avcodec.h:1765
void ff_simple_idct_put_neon(uint8_t *dest, ptrdiff_t line_size, int16_t *data)
#define FF_IDCT_AUTO
Definition: avcodec.h:1730
#define FF_IDCT_SIMPLEAUTO
Definition: avcodec.h:1743
#define have_neon(flags)
Definition: cpu.h:26
int idct_algo
IDCT algorithm, see FF_IDCT_* below.
Definition: avcodec.h:1729
void(* idct_add)(uint8_t *dest, ptrdiff_t line_size, int16_t *block)
block -> idct -> add dest -> clip to unsigned 8 bit -> dest.
Definition: idctdsp.h:79
void(* idct_put)(uint8_t *dest, ptrdiff_t line_size, int16_t *block)
block -> idct -> clip to unsigned 8 bit -> dest.
Definition: idctdsp.h:72
Libavcodec external API header.
#define FF_IDCT_SIMPLENEON
Definition: avcodec.h:1741
main external API structure.
Definition: avcodec.h:526
int av_get_cpu_flags(void)
Return the flags which specify extensions supported by the CPU.
Definition: cpu.c:93
av_cold void ff_idctdsp_init_aarch64(IDCTDSPContext *c, AVCodecContext *avctx, unsigned high_bit_depth)
static double c[64]
void(* idct)(int16_t *block)
Definition: idctdsp.h:65
enum idct_permutation_type perm_type
Definition: idctdsp.h:97