40e6575aa3
This is more spec-compliant because it does not rely on dead-code elimination by the compiler. Especially MSVC has problems with this, as can be seen in https://ffmpeg.org/pipermail/ffmpeg-devel/2022-May/296373.html or https://ffmpeg.org/pipermail/ffmpeg-devel/2022-May/297022.html This commit does not eliminate every instance where we rely on dead code elimination: It only tackles branching to the initialization of arch-specific dsp code, not e.g. all uses of CONFIG_ and HAVE_ checks. But maybe it is already enough to compile FFmpeg with MSVC with whole-programm-optimizations enabled (if one does not disable too many components). Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
84 lines
2.5 KiB
C
84 lines
2.5 KiB
C
/*
|
|
* This file is part of FFmpeg.
|
|
*
|
|
* FFmpeg is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* FFmpeg is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with FFmpeg; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
#include <stdint.h>
|
|
|
|
#include "config.h"
|
|
#include "libavutil/attributes.h"
|
|
#include "utvideodsp.h"
|
|
|
|
static void restore_rgb_planes_c(uint8_t *src_r,
|
|
uint8_t *src_g,
|
|
uint8_t *src_b,
|
|
ptrdiff_t linesize_r,
|
|
ptrdiff_t linesize_g,
|
|
ptrdiff_t linesize_b,
|
|
int width, int height)
|
|
{
|
|
uint8_t r, g, b;
|
|
int i, j;
|
|
|
|
for (j = 0; j < height; j++) {
|
|
for (i = 0; i < width; i++) {
|
|
r = src_r[i];
|
|
g = src_g[i];
|
|
b = src_b[i];
|
|
src_r[i] = r + g - 0x80;
|
|
src_b[i] = b + g - 0x80;
|
|
}
|
|
src_r += linesize_r;
|
|
src_g += linesize_g;
|
|
src_b += linesize_b;
|
|
}
|
|
}
|
|
|
|
static void restore_rgb_planes10_c(uint16_t *src_r,
|
|
uint16_t *src_g,
|
|
uint16_t *src_b,
|
|
ptrdiff_t linesize_r,
|
|
ptrdiff_t linesize_g,
|
|
ptrdiff_t linesize_b,
|
|
int width, int height)
|
|
{
|
|
int r, g, b;
|
|
int i, j;
|
|
|
|
for (j = 0; j < height; j++) {
|
|
for (i = 0; i < width; i++) {
|
|
r = src_r[i];
|
|
g = src_g[i];
|
|
b = src_b[i];
|
|
src_r[i] = (r + g - 0x200) & 0x3FF;
|
|
src_b[i] = (b + g - 0x200) & 0x3FF;
|
|
}
|
|
src_r += linesize_r;
|
|
src_g += linesize_g;
|
|
src_b += linesize_b;
|
|
}
|
|
}
|
|
|
|
av_cold void ff_utvideodsp_init(UTVideoDSPContext *c)
|
|
{
|
|
c->restore_rgb_planes = restore_rgb_planes_c;
|
|
c->restore_rgb_planes10 = restore_rgb_planes10_c;
|
|
|
|
#if ARCH_X86
|
|
ff_utvideodsp_init_x86(c);
|
|
#endif
|
|
}
|