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>
72 lines
2.2 KiB
C
72 lines
2.2 KiB
C
/*
|
|
* Format Conversion Utils
|
|
* Copyright (c) 2000, 2001 Fabrice Bellard
|
|
* Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
|
|
*
|
|
* 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 "avcodec.h"
|
|
#include "fmtconvert.h"
|
|
|
|
static void int32_to_float_fmul_scalar_c(float *dst, const int32_t *src,
|
|
float mul, int len)
|
|
{
|
|
int i;
|
|
for(i=0; i<len; i++)
|
|
dst[i] = src[i] * mul;
|
|
}
|
|
|
|
static void int32_to_float_c(float *dst, const int32_t *src, intptr_t len)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < len; i++)
|
|
dst[i] = (float)src[i];
|
|
}
|
|
|
|
static void int32_to_float_fmul_array8_c(FmtConvertContext *c, float *dst,
|
|
const int32_t *src, const float *mul,
|
|
int len)
|
|
{
|
|
int i;
|
|
for (i = 0; i < len; i += 8)
|
|
c->int32_to_float_fmul_scalar(&dst[i], &src[i], *mul++, 8);
|
|
}
|
|
|
|
av_cold void ff_fmt_convert_init(FmtConvertContext *c, AVCodecContext *avctx)
|
|
{
|
|
c->int32_to_float = int32_to_float_c;
|
|
c->int32_to_float_fmul_scalar = int32_to_float_fmul_scalar_c;
|
|
c->int32_to_float_fmul_array8 = int32_to_float_fmul_array8_c;
|
|
|
|
#if ARCH_AARCH64
|
|
ff_fmt_convert_init_aarch64(c, avctx);
|
|
#elif ARCH_ARM
|
|
ff_fmt_convert_init_arm(c, avctx);
|
|
#elif ARCH_PPC
|
|
ff_fmt_convert_init_ppc(c, avctx);
|
|
#elif ARCH_X86
|
|
ff_fmt_convert_init_x86(c, avctx);
|
|
#endif
|
|
#if HAVE_MIPSFPU
|
|
ff_fmt_convert_init_mips(c);
|
|
#endif
|
|
}
|