mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-02 03:06:28 +02:00
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>
63 lines
1.8 KiB
C
63 lines
1.8 KiB
C
/*
|
|
* V210 decoder DSP init
|
|
*
|
|
* Copyright (C) 2009 Michael Niedermayer <michaelni@gmx.at>
|
|
* Copyright (c) 2009 Baptiste Coudurier <baptiste dot coudurier at gmail dot com>
|
|
*
|
|
* 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
|
|
*/
|
|
|
|
#ifndef AVCODEC_V210DEC_INIT_H
|
|
#define AVCODEC_V210DEC_INIT_H
|
|
|
|
#include <stdint.h>
|
|
|
|
#include "config.h"
|
|
#include "libavutil/attributes.h"
|
|
#include "libavutil/bswap.h"
|
|
#include "v210dec.h"
|
|
|
|
#define READ_PIXELS(a, b, c) \
|
|
do { \
|
|
val = av_le2ne32(*src++); \
|
|
*a++ = val & 0x3FF; \
|
|
*b++ = (val >> 10) & 0x3FF; \
|
|
*c++ = (val >> 20) & 0x3FF; \
|
|
} while (0)
|
|
|
|
static void v210_planar_unpack_c(const uint32_t *src, uint16_t *y, uint16_t *u, uint16_t *v, int width)
|
|
{
|
|
uint32_t val;
|
|
|
|
for (int i = 0; i < width - 5; i += 6) {
|
|
READ_PIXELS(u, y, v);
|
|
READ_PIXELS(y, u, y);
|
|
READ_PIXELS(v, y, u);
|
|
READ_PIXELS(y, v, y);
|
|
}
|
|
}
|
|
|
|
static av_unused av_cold void ff_v210dec_init(V210DecContext *s)
|
|
{
|
|
s->unpack_frame = v210_planar_unpack_c;
|
|
#if ARCH_X86
|
|
ff_v210_x86_init(s);
|
|
#endif
|
|
}
|
|
|
|
#endif /* AVCODEC_V210DEC_INIT_H */
|