FFmpeg
4.4
libavcodec
aarch64
idctdsp_init_aarch64.c
Go to the documentation of this file.
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/*
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* ARM-NEON-optimized IDCT functions
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* Copyright (c) 2008 Mans Rullgard <mans@mansr.com>
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* Copyright (c) 2017 Matthieu Bouron <matthieu.bouron@gmail.com>
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "
libavutil/attributes.h
"
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#include "
libavutil/cpu.h
"
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#include "
libavutil/arm/cpu.h
"
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#include "
libavcodec/avcodec.h
"
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#include "
libavcodec/idctdsp.h
"
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#include "
idct.h
"
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av_cold
void
ff_idctdsp_init_aarch64
(
IDCTDSPContext
*
c
,
AVCodecContext
*avctx,
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unsigned
high_bit_depth)
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{
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int
cpu_flags
=
av_get_cpu_flags
();
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if
(
have_neon
(
cpu_flags
) && !avctx->
lowres
&& !high_bit_depth) {
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if
(avctx->
idct_algo
==
FF_IDCT_AUTO
||
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avctx->
idct_algo
==
FF_IDCT_SIMPLEAUTO
||
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avctx->
idct_algo
==
FF_IDCT_SIMPLENEON
) {
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c
->idct_put =
ff_simple_idct_put_neon
;
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c
->idct_add =
ff_simple_idct_add_neon
;
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c
->idct =
ff_simple_idct_neon
;
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c
->perm_type =
FF_IDCT_PERM_PARTTRANS
;
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}
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}
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}
have_neon
#define have_neon(flags)
Definition:
cpu.h:26
ff_simple_idct_add_neon
void ff_simple_idct_add_neon(uint8_t *dest, ptrdiff_t line_size, int16_t *data)
ff_simple_idct_put_neon
void ff_simple_idct_put_neon(uint8_t *dest, ptrdiff_t line_size, int16_t *data)
ff_simple_idct_neon
void ff_simple_idct_neon(int16_t *data)
cpu.h
idct.h
attributes.h
Macro definitions for various function/variable attributes.
av_cold
#define av_cold
Definition:
attributes.h:88
avcodec.h
Libavcodec external API header.
FF_IDCT_AUTO
#define FF_IDCT_AUTO
Definition:
avcodec.h:1720
FF_IDCT_SIMPLEAUTO
#define FF_IDCT_SIMPLEAUTO
Definition:
avcodec.h:1733
FF_IDCT_SIMPLENEON
#define FF_IDCT_SIMPLENEON
Definition:
avcodec.h:1731
cpu_flags
static atomic_int cpu_flags
Definition:
cpu.c:50
av_get_cpu_flags
int av_get_cpu_flags(void)
Return the flags which specify extensions supported by the CPU.
Definition:
cpu.c:95
cpu.h
idctdsp.h
FF_IDCT_PERM_PARTTRANS
@ FF_IDCT_PERM_PARTTRANS
Definition:
idctdsp.h:42
ff_idctdsp_init_aarch64
av_cold void ff_idctdsp_init_aarch64(IDCTDSPContext *c, AVCodecContext *avctx, unsigned high_bit_depth)
Definition:
idctdsp_init_aarch64.c:30
AVCodecContext
main external API structure.
Definition:
avcodec.h:536
AVCodecContext::idct_algo
int idct_algo
IDCT algorithm, see FF_IDCT_* below.
Definition:
avcodec.h:1719
AVCodecContext::lowres
int lowres
low resolution decoding, 1-> 1/2 size, 2->1/4 size
Definition:
avcodec.h:1754
IDCTDSPContext
Definition:
idctdsp.h:53
c
static double c[64]
Definition:
vsrc_mptestsrc.c:92
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