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
23 #ifndef AVCODEC_FMTCONVERT_H
24 #define AVCODEC_FMTCONVERT_H
28 typedef struct FmtConvertContext {
30 * Convert an array of int32_t to float and multiply by a float value.
31 * @param dst destination array of float.
32 * constraints: 16-byte aligned
33 * @param src source array of int32_t.
34 * constraints: 16-byte aligned
35 * @param len number of elements to convert.
36 * constraints: multiple of 8
38 void (*int32_to_float_fmul_scalar)(float *dst, const int *src, float mul, int len);
41 * Convert an array of float to an array of int16_t.
43 * Convert floats from in the range [-32768.0,32767.0] to ints
46 * @param dst destination array of int16_t.
47 * constraints: 16-byte aligned
48 * @param src source array of float.
49 * constraints: 16-byte aligned
50 * @param len number of elements to convert.
51 * constraints: multiple of 8
53 void (*float_to_int16)(int16_t *dst, const float *src, long len);
56 * Convert multiple arrays of float to an interleaved array of int16_t.
58 * Convert floats from in the range [-32768.0,32767.0] to ints
61 * @param dst destination array of interleaved int16_t.
62 * constraints: 16-byte aligned
63 * @param src source array of float arrays, one for each channel.
64 * constraints: 16-byte aligned
65 * @param len number of elements to convert.
66 * constraints: multiple of 8
67 * @param channels number of channels
69 void (*float_to_int16_interleave)(int16_t *dst, const float **src,
70 long len, int channels);
73 * Convert an array of interleaved float to multiple arrays of float.
75 void (*float_interleave)(float *dst, const float **src, unsigned int len,
79 void ff_float_interleave_c(float *dst, const float **src, unsigned int len,
82 void ff_fmt_convert_init(FmtConvertContext *c, AVCodecContext *avctx);
84 void ff_fmt_convert_init_arm(FmtConvertContext *c, AVCodecContext *avctx);
85 void ff_fmt_convert_init_altivec(FmtConvertContext *c, AVCodecContext *avctx);
86 void ff_fmt_convert_init_x86(FmtConvertContext *c, AVCodecContext *avctx);
88 #endif /* AVCODEC_FMTCONVERT_H */