mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-11-26 19:01:44 +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>
92 lines
2.9 KiB
C
92 lines
2.9 KiB
C
/*
|
|
* V210 encoder 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_V210ENC_INIT_H
|
|
#define AVCODEC_V210ENC_INIT_H
|
|
|
|
#include <stddef.h>
|
|
#include <stdint.h>
|
|
|
|
#include "config.h"
|
|
#include "libavutil/attributes.h"
|
|
#include "libavutil/common.h"
|
|
#include "libavutil/intreadwrite.h"
|
|
#include "v210enc.h"
|
|
|
|
#define CLIP(v, depth) av_clip(v, 1<<(depth-8), ((1<<depth)-(1<<(depth-8))-1))
|
|
#define WRITE_PIXELS(a, b, c, depth) \
|
|
do { \
|
|
val = CLIP(*a++, depth) << (10-depth); \
|
|
val |= (CLIP(*b++, depth) << (20-depth)) | \
|
|
(CLIP(*c++, depth) << (30-depth)); \
|
|
AV_WL32(dst, val); \
|
|
dst += 4; \
|
|
} while (0)
|
|
|
|
static void v210_planar_pack_8_c(const uint8_t *y, const uint8_t *u,
|
|
const uint8_t *v, uint8_t *dst,
|
|
ptrdiff_t width)
|
|
{
|
|
uint32_t val;
|
|
|
|
/* unroll this to match the assembly */
|
|
for (int i = 0; i < width - 11; i += 12) {
|
|
WRITE_PIXELS(u, y, v, 8);
|
|
WRITE_PIXELS(y, u, y, 8);
|
|
WRITE_PIXELS(v, y, u, 8);
|
|
WRITE_PIXELS(y, v, y, 8);
|
|
WRITE_PIXELS(u, y, v, 8);
|
|
WRITE_PIXELS(y, u, y, 8);
|
|
WRITE_PIXELS(v, y, u, 8);
|
|
WRITE_PIXELS(y, v, y, 8);
|
|
}
|
|
}
|
|
|
|
static void v210_planar_pack_10_c(const uint16_t *y, const uint16_t *u,
|
|
const uint16_t *v, uint8_t *dst,
|
|
ptrdiff_t width)
|
|
{
|
|
uint32_t val;
|
|
|
|
for (int i = 0; i < width - 5; i += 6) {
|
|
WRITE_PIXELS(u, y, v, 10);
|
|
WRITE_PIXELS(y, u, y, 10);
|
|
WRITE_PIXELS(v, y, u, 10);
|
|
WRITE_PIXELS(y, v, y, 10);
|
|
}
|
|
}
|
|
|
|
static av_cold av_unused void ff_v210enc_init(V210EncContext *s)
|
|
{
|
|
s->pack_line_8 = v210_planar_pack_8_c;
|
|
s->pack_line_10 = v210_planar_pack_10_c;
|
|
s->sample_factor_8 = 2;
|
|
s->sample_factor_10 = 1;
|
|
|
|
#if ARCH_X86
|
|
ff_v210enc_init_x86(s);
|
|
#endif
|
|
}
|
|
|
|
#endif /* AVCODEC_V210ENC_INIT_H */
|