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fmtconvert_init.c
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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_sse (float *dst, const int32_t *src, float mul, int len);
33 void ff_int32_to_float_fmul_scalar_sse2(float *dst, const int32_t *src, float mul, int len);
34 void ff_int32_to_float_fmul_array8_sse (FmtConvertContext *c, float *dst, const int32_t *src,
35  const float *mul, int len);
36 void ff_int32_to_float_fmul_array8_sse2(FmtConvertContext *c, float *dst, const int32_t *src,
37  const float *mul, int len);
38 
39 #endif /* HAVE_X86ASM */
40 
42 {
43 #if HAVE_X86ASM
45 
46  if (EXTERNAL_SSE(cpu_flags)) {
47  c->int32_to_float_fmul_scalar = ff_int32_to_float_fmul_scalar_sse;
48  c->int32_to_float_fmul_array8 = ff_int32_to_float_fmul_array8_sse;
49  }
50  if (EXTERNAL_SSE2(cpu_flags)) {
51  c->int32_to_float_fmul_scalar = ff_int32_to_float_fmul_scalar_sse2;
52  c->int32_to_float_fmul_array8 = ff_int32_to_float_fmul_array8_sse2;
53  }
54 #endif /* HAVE_X86ASM */
55 }
static atomic_int cpu_flags
Definition: cpu.c:50
#define EXTERNAL_SSE(flags)
Definition: cpu.h:58
#define src
Definition: vp8dsp.c:254
Macro definitions for various function/variable attributes.
#define av_cold
Definition: attributes.h:82
void(* int32_to_float_fmul_array8)(struct FmtConvertContext *c, float *dst, const int32_t *src, const float *mul, int len)
Convert an array of int32_t to float and multiply by a float value from another array, stepping along the float array once for each 8 integers.
Definition: fmtconvert.h:63
#define EXTERNAL_SSE2(flags)
Definition: cpu.h:59
int32_t
void(* int32_to_float_fmul_scalar)(float *dst, const int32_t *src, float mul, int len)
Convert an array of int32_t to float and multiply by a float value.
Definition: fmtconvert.h:38
main external API structure.
Definition: avcodec.h:1502
int av_get_cpu_flags(void)
Return the flags which specify extensions supported by the CPU.
Definition: cpu.c:92
static double c[64]
int len
av_cold void ff_fmt_convert_init_x86(FmtConvertContext *c, AVCodecContext *avctx)