mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-18 03:19:31 +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>
99 lines
3.2 KiB
C
99 lines
3.2 KiB
C
/*
|
|
* Apple ProRes compatible decoder
|
|
*
|
|
* Copyright (c) 2010-2011 Maxim Poliakovski
|
|
*
|
|
* 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 "config.h"
|
|
#include "libavutil/attributes.h"
|
|
#include "libavutil/common.h"
|
|
#include "idctdsp.h"
|
|
#include "proresdsp.h"
|
|
#include "simple_idct.h"
|
|
|
|
#define CLIP_MIN (1 << 2) ///< minimum value for clipping resulting pixels
|
|
#define CLIP_MAX_10 (1 << 10) - CLIP_MIN - 1 ///< maximum value for clipping resulting pixels
|
|
#define CLIP_MAX_12 (1 << 12) - CLIP_MIN - 1 ///< maximum value for clipping resulting pixels
|
|
|
|
#define CLIP_10(x) (av_clip((x), CLIP_MIN, CLIP_MAX_10))
|
|
#define CLIP_12(x) (av_clip((x), CLIP_MIN, CLIP_MAX_12))
|
|
|
|
/**
|
|
* Add bias value, clamp and output pixels of a slice
|
|
*/
|
|
|
|
static inline void put_pixel(uint16_t *dst, ptrdiff_t linesize, const int16_t *in, int bits_per_raw_sample) {
|
|
int x, y, src_offset, dst_offset;
|
|
|
|
for (y = 0, dst_offset = 0; y < 8; y++, dst_offset += linesize) {
|
|
for (x = 0; x < 8; x++) {
|
|
src_offset = (y << 3) + x;
|
|
|
|
if (bits_per_raw_sample == 10) {
|
|
dst[dst_offset + x] = CLIP_10(in[src_offset]);
|
|
} else {//12b
|
|
dst[dst_offset + x] = CLIP_12(in[src_offset]);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
static void put_pixels_10(uint16_t *dst, ptrdiff_t linesize, const int16_t *in)
|
|
{
|
|
put_pixel(dst, linesize, in, 10);
|
|
}
|
|
|
|
static void put_pixels_12(uint16_t *dst, ptrdiff_t linesize, const int16_t *in)
|
|
{
|
|
put_pixel(dst, linesize, in, 12);
|
|
}
|
|
|
|
static void prores_idct_put_10_c(uint16_t *out, ptrdiff_t linesize, int16_t *block, const int16_t *qmat)
|
|
{
|
|
ff_prores_idct_10(block, qmat);
|
|
put_pixels_10(out, linesize >> 1, block);
|
|
}
|
|
|
|
static void prores_idct_put_12_c(uint16_t *out, ptrdiff_t linesize, int16_t *block, const int16_t *qmat)
|
|
{
|
|
ff_prores_idct_12(block, qmat);
|
|
put_pixels_12(out, linesize >> 1, block);
|
|
}
|
|
|
|
av_cold int ff_proresdsp_init(ProresDSPContext *dsp, AVCodecContext *avctx)
|
|
{
|
|
if (avctx->bits_per_raw_sample == 10) {
|
|
dsp->idct_put = prores_idct_put_10_c;
|
|
dsp->idct_permutation_type = FF_IDCT_PERM_NONE;
|
|
} else if (avctx->bits_per_raw_sample == 12) {
|
|
dsp->idct_put = prores_idct_put_12_c;
|
|
dsp->idct_permutation_type = FF_IDCT_PERM_NONE;
|
|
} else {
|
|
return AVERROR_BUG;
|
|
}
|
|
|
|
#if ARCH_X86
|
|
ff_proresdsp_init_x86(dsp, avctx);
|
|
#endif
|
|
|
|
ff_init_scantable_permutation(dsp->idct_permutation,
|
|
dsp->idct_permutation_type);
|
|
return 0;
|
|
}
|