FFmpeg
libavfilter
x86
vf_eq_init.c
Go to the documentation of this file.
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/*
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*
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* Original MPlayer filters by Richard Felker.
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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 modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with FFmpeg; if not, write to the Free Software Foundation, Inc.,
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* 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/x86/cpu.h
"
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#include "
libavutil/x86/asm.h
"
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#include "
libavfilter/vf_eq.h
"
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extern
void
ff_process_one_line_sse2
(
const
uint8_t *
src
, uint8_t *
dst
,
short
contrast,
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short
brightness,
int
w
);
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#if HAVE_X86ASM
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static
void
process_sse2(
EQParameters
*param, uint8_t *
dst
,
int
dst_stride,
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const
uint8_t *
src
,
int
src_stride,
int
w
,
int
h
)
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{
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short
contrast = (
short
) (param->
contrast
* 256 * 16);
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short
brightness = ((
short
) (100.0 * param->
brightness
+ 100.0) * 511)
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/ 200 - 128 - contrast / 32;
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while
(
h
--) {
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ff_process_one_line_sse2
(
src
,
dst
, contrast, brightness,
w
);
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src
+= src_stride;
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dst
+= dst_stride;
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}
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}
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#endif
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av_cold
void
ff_eq_init_x86
(
EQContext
*
eq
)
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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_SSE2
(
cpu_flags
)) {
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eq
->process = process_sse2;
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}
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#endif
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}
cpu.h
ff_process_one_line_sse2
void ff_process_one_line_sse2(const uint8_t *src, uint8_t *dst, short contrast, short brightness, int w)
w
uint8_t w
Definition:
llviddspenc.c:38
ff_eq_init_x86
av_cold void ff_eq_init_x86(EQContext *eq)
Definition:
vf_eq_init.c:47
av_get_cpu_flags
int av_get_cpu_flags(void)
Return the flags which specify extensions supported by the CPU.
Definition:
cpu.c:109
cpu_flags
static atomic_int cpu_flags
Definition:
cpu.c:56
eq
#define eq(A, B)
Definition:
vf_xbr.c:92
av_cold
#define av_cold
Definition:
attributes.h:90
EQParameters
Definition:
vf_eq.h:51
vf_eq.h
asm.h
dst
uint8_t ptrdiff_t const uint8_t ptrdiff_t int intptr_t intptr_t int int16_t * dst
Definition:
dsp.h:83
cpu.h
EQContext
Definition:
vf_eq.h:62
EQParameters::contrast
double contrast
Definition:
vf_eq.h:57
attributes.h
EXTERNAL_SSE2
#define EXTERNAL_SSE2(flags)
Definition:
cpu.h:59
EQParameters::brightness
double brightness
Definition:
vf_eq.h:57
h
h
Definition:
vp9dsp_template.c:2070
short
it s the only field you need to keep assuming you have a context There is some magic you don t need to care about around this just let it vf default minimum maximum flags name is the option keep it simple and lowercase description are short
Definition:
writing_filters.txt:89
src
#define src
Definition:
vp8dsp.c:248
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