2 * Format Conversion Utils
3 * Copyright (c) 2000, 2001 Fabrice Bellard
4 * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
6 * This file is part of Libav.
8 * Libav 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.
13 * Libav 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.
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with Libav; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24 #include "fmtconvert.h"
26 static void int32_to_float_fmul_scalar_c(float *dst, const int *src, float mul, int len){
29 dst[i] = src[i] * mul;
32 static av_always_inline int float_to_int16_one(const float *src){
33 return av_clip_int16(lrintf(*src));
36 static void float_to_int16_c(int16_t *dst, const float *src, long len)
40 dst[i] = float_to_int16_one(src+i);
43 static void float_to_int16_interleave_c(int16_t *dst, const float **src,
44 long len, int channels)
49 dst[2*i] = float_to_int16_one(src[0]+i);
50 dst[2*i+1] = float_to_int16_one(src[1]+i);
53 for(c=0; c<channels; c++)
54 for(i=0, j=c; i<len; i++, j+=channels)
55 dst[j] = float_to_int16_one(src[c]+i);
59 void ff_float_interleave_c(float *dst, const float **src, unsigned int len,
65 for (i = 0; i < len; i++) {
67 dst[2*i+1] = src[1][i];
69 } else if (channels == 1 && len < INT_MAX / sizeof(float)) {
70 memcpy(dst, src[0], len * sizeof(float));
72 for (c = 0; c < channels; c++)
73 for (i = 0, j = c; i < len; i++, j += channels)
78 av_cold void ff_fmt_convert_init(FmtConvertContext *c, AVCodecContext *avctx)
80 c->int32_to_float_fmul_scalar = int32_to_float_fmul_scalar_c;
81 c->float_to_int16 = float_to_int16_c;
82 c->float_to_int16_interleave = float_to_int16_interleave_c;
83 c->float_interleave = ff_float_interleave_c;
85 if (ARCH_ARM) ff_fmt_convert_init_arm(c, avctx);
86 if (HAVE_ALTIVEC) ff_fmt_convert_init_altivec(c, avctx);
87 if (HAVE_MMX) ff_fmt_convert_init_x86(c, avctx);