FFmpeg
4.4.4
libavcodec
x86
blockdsp_init.c
Go to the documentation of this file.
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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 <stdint.h>
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#include "
config.h
"
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#include "
libavutil/attributes.h
"
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#include "
libavutil/internal.h
"
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#include "
libavutil/cpu.h
"
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#include "
libavutil/x86/cpu.h
"
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#include "
libavcodec/blockdsp.h
"
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#include "
libavcodec/version.h
"
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void
ff_clear_block_mmx
(int16_t *
block
);
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void
ff_clear_block_sse
(int16_t *
block
);
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void
ff_clear_block_avx
(int16_t *
block
);
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void
ff_clear_blocks_mmx
(int16_t *blocks);
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void
ff_clear_blocks_sse
(int16_t *blocks);
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void
ff_clear_blocks_avx
(int16_t *blocks);
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av_cold
void
ff_blockdsp_init_x86
(
BlockDSPContext
*
c
,
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AVCodecContext
*avctx)
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{
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#if HAVE_X86ASM
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int
cpu_flags
=
av_get_cpu_flags
();
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if
(
EXTERNAL_MMX
(
cpu_flags
)) {
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c
->clear_block =
ff_clear_block_mmx
;
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c
->clear_blocks =
ff_clear_blocks_mmx
;
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}
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/* XvMCCreateBlocks() may not allocate 16-byte aligned blocks */
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if
(
CONFIG_XVMC
&& avctx->
hwaccel
&& avctx->
hwaccel
->
decode_mb
)
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return
;
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if
(
EXTERNAL_SSE
(
cpu_flags
)) {
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c
->clear_block =
ff_clear_block_sse
;
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c
->clear_blocks =
ff_clear_blocks_sse
;
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}
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if
(
EXTERNAL_AVX_FAST
(
cpu_flags
)) {
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c
->clear_block =
ff_clear_block_avx
;
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c
->clear_blocks =
ff_clear_blocks_avx
;
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}
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#endif
/* HAVE_X86ASM */
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}
attributes.h
Macro definitions for various function/variable attributes.
av_cold
#define av_cold
Definition:
attributes.h:88
blockdsp.h
ff_blockdsp_init_x86
av_cold void ff_blockdsp_init_x86(BlockDSPContext *c, AVCodecContext *avctx)
Definition:
blockdsp_init.c:36
ff_clear_block_mmx
void ff_clear_block_mmx(int16_t *block)
ff_clear_blocks_avx
void ff_clear_blocks_avx(int16_t *blocks)
ff_clear_block_avx
void ff_clear_block_avx(int16_t *block)
ff_clear_block_sse
void ff_clear_block_sse(int16_t *block)
ff_clear_blocks_mmx
void ff_clear_blocks_mmx(int16_t *blocks)
ff_clear_blocks_sse
void ff_clear_blocks_sse(int16_t *blocks)
config.h
CONFIG_XVMC
#define CONFIG_XVMC
Definition:
config.h:554
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
version.h
Libavcodec version macros.
internal.h
common internal API header
AVCodecContext
main external API structure.
Definition:
avcodec.h:536
AVCodecContext::hwaccel
const struct AVHWAccel * hwaccel
Hardware accelerator in use.
Definition:
avcodec.h:1680
AVHWAccel::decode_mb
void(* decode_mb)(struct MpegEncContext *s)
Called for every Macroblock in a slice.
Definition:
avcodec.h:2559
BlockDSPContext
Definition:
blockdsp.h:35
block
static int16_t block[64]
Definition:
dct.c:116
c
static double c[64]
Definition:
vsrc_mptestsrc.c:92
cpu.h
EXTERNAL_SSE
#define EXTERNAL_SSE(flags)
Definition:
cpu.h:58
EXTERNAL_MMX
#define EXTERNAL_MMX(flags)
Definition:
cpu.h:56
EXTERNAL_AVX_FAST
#define EXTERNAL_AVX_FAST(flags)
Definition:
cpu.h:71
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