FFmpeg
libavfilter
x86
vf_idet_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 "
libavutil/attributes.h
"
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#include "
libavutil/cpu.h
"
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#include "
libavutil/x86/asm.h
"
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#include "
libavutil/x86/cpu.h
"
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#include "
libavfilter/vf_idet.h
"
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#if HAVE_X86ASM
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/* declares main callable idet_filter_line_sse2() */
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#define FUNC_MAIN_DECL(KIND, SPAN) \
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int ff_idet_filter_line_##KIND(const uint8_t *a, const uint8_t *b, \
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const uint8_t *c, int w); \
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static int idet_filter_line_##KIND(const uint8_t *a, const uint8_t *b, \
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const uint8_t *c, int w) { \
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int sum = 0; \
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const int left_over = w & (SPAN - 1); \
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w -= left_over; \
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if (w > 0) \
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sum += ff_idet_filter_line_##KIND(a, b, c, w); \
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if (left_over > 0) \
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sum += ff_idet_filter_line_c(a + w, b + w, c + w, left_over); \
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return sum; \
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}
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#define FUNC_MAIN_DECL_16bit(KIND, SPAN) \
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int ff_idet_filter_line_16bit_##KIND(const uint16_t *a, const uint16_t *b, \
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const uint16_t *c, int w); \
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static int idet_filter_line_16bit_##KIND(const uint16_t *a, const uint16_t *b, \
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const uint16_t *c, int w) { \
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int sum = 0; \
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const int left_over = w & (SPAN - 1); \
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w -= left_over; \
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if (w > 0) \
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sum += ff_idet_filter_line_16bit_##KIND(a, b, c, w); \
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if (left_over > 0) \
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sum += ff_idet_filter_line_c_16bit(a + w, b + w, c + w, left_over); \
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return sum; \
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}
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FUNC_MAIN_DECL(sse2, 16)
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FUNC_MAIN_DECL_16bit(sse2, 8)
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#endif
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av_cold
void
ff_idet_init_x86
(
IDETContext
*idet,
int
for_16b)
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{
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#if HAVE_X86ASM
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const
int
cpu_flags
=
av_get_cpu_flags
();
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if
(
EXTERNAL_SSE2
(
cpu_flags
)) {
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idet->
filter_line
= for_16b ? (
ff_idet_filter_func
)idet_filter_line_16bit_sse2 : idet_filter_line_sse2;
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}
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#endif // HAVE_X86ASM
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}
cpu.h
IDETContext::filter_line
ff_idet_filter_func filter_line
Definition:
vf_idet.h:64
av_get_cpu_flags
int av_get_cpu_flags(void)
Return the flags which specify extensions supported by the CPU.
Definition:
cpu.c:107
cpu_flags
static atomic_int cpu_flags
Definition:
cpu.c:56
IDETContext
Definition:
vf_idet.h:42
vf_idet.h
av_cold
#define av_cold
Definition:
attributes.h:90
asm.h
ff_idet_init_x86
av_cold void ff_idet_init_x86(IDETContext *idet, int for_16b)
Definition:
vf_idet_init.c:63
cpu.h
ff_idet_filter_func
int(* ff_idet_filter_func)(const uint8_t *a, const uint8_t *b, const uint8_t *c, int w)
Definition:
vf_idet.h:27
attributes.h
EXTERNAL_SSE2
#define EXTERNAL_SSE2(flags)
Definition:
cpu.h:59
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