1 /*
2 * Format Conversion Utils
3 * Copyright (c) 2000, 2001 Fabrice Bellard
4 * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
5 *
6 * MMX optimization by Nick Kurshev <nickols_k@mail.ru>
7 *
8 * This file is part of FFmpeg.
9 *
10 * FFmpeg is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU Lesser General Public
12 * License as published by the Free Software Foundation; either
13 * version 2.1 of the License, or (at your option) any later version.
14 *
15 * FFmpeg is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * Lesser General Public License for more details.
19 *
20 * You should have received a copy of the GNU Lesser General Public
21 * License along with FFmpeg; if not, write to the Free Software
22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23 */
24
25 #include "libavutil/attributes.h"
26 #include "libavutil/cpu.h"
27 #include "libavutil/x86/cpu.h"
28 #include "libavcodec/fmtconvert.h"
29
30 #if HAVE_X86ASM
31
32 void ff_int32_to_float_fmul_scalar_sse2(float *dst, const int32_t *src, float mul, int len);
33 void ff_int32_to_float_fmul_array8_sse2(FmtConvertContext *c, float *dst, const int32_t *src,
34 const float *mul, int len);
35
36 #endif /* HAVE_X86ASM */
37
ff_fmt_convert_init_x86(FmtConvertContext *c, AVCodecContext *avctx)38 av_cold void ff_fmt_convert_init_x86(FmtConvertContext *c, AVCodecContext *avctx)
39 {
40 #if HAVE_X86ASM
41 int cpu_flags = av_get_cpu_flags();
42
43 if (EXTERNAL_SSE2(cpu_flags)) {
44 c->int32_to_float_fmul_scalar = ff_int32_to_float_fmul_scalar_sse2;
45 c->int32_to_float_fmul_array8 = ff_int32_to_float_fmul_array8_sse2;
46 }
47 #endif /* HAVE_X86ASM */
48 }
49