FFmpeg
libavcodec
vp56dsp.c
Go to the documentation of this file.
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/*
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* Copyright (c) 2006 Aurelien Jacobs <aurel@gnuage.org>
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* Copyright (c) 2010 Mans Rullgard <mans@mansr.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 <stdint.h>
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#include "config.h"
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#include "
libavutil/attributes.h
"
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#include "
vp56dsp.h
"
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#include "
libavutil/common.h
"
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#define VP56_EDGE_FILTER(pfx, suf, pix_inc, line_inc) \
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static void pfx ## _edge_filter_ ## suf(uint8_t *yuv, ptrdiff_t stride, \
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int t) \
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{ \
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int pix2_inc = 2 * pix_inc; \
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int i, v; \
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\
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for (i=0; i<12; i++) { \
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v = (yuv[-pix2_inc] + 3*(yuv[0]-yuv[-pix_inc]) - yuv[pix_inc] + 4)>>3;\
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v = pfx##_adjust(v, t); \
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yuv[-pix_inc] = av_clip_uint8(yuv[-pix_inc] + v); \
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yuv[0] = av_clip_uint8(yuv[0] - v); \
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yuv += line_inc; \
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} \
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}
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#if CONFIG_VP5_DECODER
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/* Gives very similar result than the vp6 version except in a few cases */
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static
int
vp5_adjust(
int
v,
int
t)
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{
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int
s2
,
s1
= v >> 31;
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v ^=
s1
;
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v -=
s1
;
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v *= v < 2*t;
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v -= t;
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s2
= v >> 31;
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v ^=
s2
;
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v -=
s2
;
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v = t - v;
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v +=
s1
;
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v ^=
s1
;
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return
v;
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}
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VP56_EDGE_FILTER
(vp5, hor, 1,
stride
)
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VP56_EDGE_FILTER
(vp5, ver,
stride
, 1)
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av_cold
void
ff_vp5dsp_init
(
VP56DSPContext
*
s
)
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{
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s
->edge_filter_hor = vp5_edge_filter_hor;
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s
->edge_filter_ver = vp5_edge_filter_ver;
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}
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#endif
/* CONFIG_VP5_DECODER */
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#if CONFIG_VP6_DECODER
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av_cold
void
ff_vp6dsp_init
(
VP56DSPContext
*
s
)
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{
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s
->vp6_filter_diag4 =
ff_vp6_filter_diag4_c
;
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if
(ARCH_ARM)
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ff_vp6dsp_init_arm
(
s
);
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if
(ARCH_X86)
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ff_vp6dsp_init_x86
(
s
);
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}
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#endif
/* CONFIG_VP6_DECODER */
stride
int stride
Definition:
mace.c:144
ff_vp5dsp_init
void ff_vp5dsp_init(VP56DSPContext *s)
ff_vp6_filter_diag4_c
void ff_vp6_filter_diag4_c(uint8_t *dst, uint8_t *src, ptrdiff_t stride, const int16_t *h_weights, const int16_t *v_weights)
Definition:
vp6dsp.c:30
ff_vp6dsp_init_arm
av_cold void ff_vp6dsp_init_arm(VP56DSPContext *s)
Definition:
vp6dsp_init_arm.c:31
ff_vp6dsp_init_x86
void ff_vp6dsp_init_x86(VP56DSPContext *s)
Definition:
vp6dsp_init.c:33
av_cold
#define av_cold
Definition:
attributes.h:90
s
#define s(width, name)
Definition:
cbs_vp9.c:257
s1
#define s1
Definition:
regdef.h:38
ff_vp6dsp_init
void ff_vp6dsp_init(VP56DSPContext *s)
s2
#define s2
Definition:
regdef.h:39
VP56DSPContext
Definition:
vp56dsp.h:27
attributes.h
vp56dsp.h
common.h
VP56_EDGE_FILTER
#define VP56_EDGE_FILTER(pfx, suf, pix_inc, line_inc)
Definition:
vp56dsp.c:29
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