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fmtconvert.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  * This file is part of FFmpeg.
7  *
8  * FFmpeg is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU Lesser General Public
10  * License as published by the Free Software Foundation; either
11  * version 2.1 of the License, or (at your option) any later version.
12  *
13  * FFmpeg is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16  * Lesser General Public License for more details.
17  *
18  * You should have received a copy of the GNU Lesser General Public
19  * License along with FFmpeg; if not, write to the Free Software
20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21  */
22 
23 #include "avcodec.h"
24 #include "fmtconvert.h"
25 #include "libavutil/common.h"
26 
27 static void int32_to_float_fmul_scalar_c(float *dst, const int32_t *src,
28  float mul, int len)
29 {
30  int i;
31  for(i=0; i<len; i++)
32  dst[i] = src[i] * mul;
33 }
34 
35 static void int32_to_float_c(float *dst, const int32_t *src, intptr_t len)
36 {
37  int i;
38 
39  for (i = 0; i < len; i++)
40  dst[i] = (float)src[i];
41 }
42 
44  const int32_t *src, const float *mul,
45  int len)
46 {
47  int i;
48  for (i = 0; i < len; i += 8)
49  c->int32_to_float_fmul_scalar(&dst[i], &src[i], *mul++, 8);
50 }
51 
53 {
57 
58  if (ARCH_AARCH64)
60  if (ARCH_ARM)
61  ff_fmt_convert_init_arm(c, avctx);
62  if (ARCH_PPC)
63  ff_fmt_convert_init_ppc(c, avctx);
64  if (ARCH_X86)
65  ff_fmt_convert_init_x86(c, avctx);
66  if (HAVE_MIPSFPU)
68 }
av_cold void ff_fmt_convert_init_aarch64(FmtConvertContext *c, AVCodecContext *avctx)
#define src
Definition: vp8dsp.c:254
static void int32_to_float_fmul_array8_c(FmtConvertContext *c, float *dst, const int32_t *src, const float *mul, int len)
Definition: fmtconvert.c:43
#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
void ff_fmt_convert_init_ppc(FmtConvertContext *c, AVCodecContext *avctx)
av_cold void ff_fmt_convert_init_arm(FmtConvertContext *c, AVCodecContext *avctx)
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
av_cold void ff_fmt_convert_init(FmtConvertContext *c, AVCodecContext *avctx)
Definition: fmtconvert.c:52
Libavcodec external API header.
main external API structure.
Definition: avcodec.h:1488
void(* int32_to_float)(float *dst, const int32_t *src, intptr_t len)
Convert an array of int32_t to float.
Definition: fmtconvert.h:49
void ff_fmt_convert_init_x86(FmtConvertContext *c, AVCodecContext *avctx)
common internal and external API header
static double c[64]
int len
static void int32_to_float_c(float *dst, const int32_t *src, intptr_t len)
Definition: fmtconvert.c:35
void ff_fmt_convert_init_mips(FmtConvertContext *c)
static void int32_to_float_fmul_scalar_c(float *dst, const int32_t *src, float mul, int len)
Definition: fmtconvert.c:27