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 FFmpeg.
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.
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.
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
24 #include "fmtconvert.h"
25 #include "libavutil/common.h"
27 static void int32_to_float_fmul_scalar_c(float *dst, const int32_t *src,
32 dst[i] = src[i] * mul;
35 static void int32_to_float_fmul_array8_c(FmtConvertContext *c, float *dst,
36 const int32_t *src, const float *mul,
40 for (i = 0; i < len; i += 8)
41 c->int32_to_float_fmul_scalar(&dst[i], &src[i], *mul++, 8);
44 av_cold void ff_fmt_convert_init(FmtConvertContext *c, AVCodecContext *avctx)
46 c->int32_to_float_fmul_scalar = int32_to_float_fmul_scalar_c;
47 c->int32_to_float_fmul_array8 = int32_to_float_fmul_array8_c;
49 if (ARCH_ARM) ff_fmt_convert_init_arm(c, avctx);
50 if (ARCH_PPC) ff_fmt_convert_init_ppc(c, avctx);
51 if (ARCH_X86) ff_fmt_convert_init_x86(c, avctx);
52 if (HAVE_MIPSFPU) ff_fmt_convert_init_mips(c);
55 /* ffdshow custom code */
56 void float_interleave(float *dst, const float **src, long len, int channels)
61 dst[2*i] = src[0][i] / 32768.0f;
62 dst[2*i+1] = src[1][i] / 32768.0f;
65 for(c=0; c<channels; c++)
66 for(i=0, j=c; i<len; i++, j+=channels)
67 dst[j] = src[c][i] / 32768.0f;
71 void float_interleave_noscale(float *dst, const float **src, long len, int channels)
77 dst[2*i+1] = src[1][i];
80 for(c=0; c<channels; c++)
81 for(i=0, j=c; i<len; i++, j+=channels)