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
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 int32_t *src,
42 * Convert an array of int32_t to float and multiply by a float value from another array,
43 * stepping along the float array once for each 8 integers.
44 * @param c pointer to FmtConvertContext.
45 * @param dst destination array of float.
46 * constraints: 16-byte aligned
47 * @param src source array of int32_t.
48 * constraints: 16-byte aligned
49 * @param mul source array of float multipliers.
50 * @param len number of elements to convert.
51 * constraints: multiple of 8
53 void (*int32_to_float_fmul_array8)(struct FmtConvertContext *c,
54 float *dst, const int32_t *src,
55 const float *mul, int len);
58 * Convert an array of float to an array of int16_t.
60 * Convert floats from in the range [-32768.0,32767.0] to ints
63 * @param dst destination array of int16_t.
64 * constraints: 16-byte aligned
65 * @param src source array of float.
66 * constraints: 16-byte aligned
67 * @param len number of elements to convert.
68 * constraints: multiple of 8
70 void (*float_to_int16)(int16_t *dst, const float *src, long len);
73 * Convert multiple arrays of float to an interleaved array of int16_t.
75 * Convert floats from in the range [-32768.0,32767.0] to ints
78 * @param dst destination array of interleaved int16_t.
79 * constraints: 16-byte aligned
80 * @param src source array of float arrays, one for each channel.
81 * constraints: 16-byte aligned
82 * @param len number of elements to convert.
83 * constraints: multiple of 8
84 * @param channels number of channels
86 void (*float_to_int16_interleave)(int16_t *dst, const float **src,
87 long len, int channels);
90 * Convert multiple arrays of float to an array of interleaved float.
92 * @param dst destination array of interleaved float.
93 * constraints: 16-byte aligned
94 * @param src source array of float arrays, one for each channel.
95 * constraints: 16-byte aligned
96 * @param len number of elements to convert.
97 * constraints: multiple of 8
98 * @param channels number of channels
100 void (*float_interleave)(float *dst, const float **src, unsigned int len,
104 void ff_float_interleave_c(float *dst, const float **src, unsigned int len,
107 void ff_fmt_convert_init(FmtConvertContext *c, AVCodecContext *avctx);
109 void ff_fmt_convert_init_arm(FmtConvertContext *c, AVCodecContext *avctx);
110 void ff_fmt_convert_init_ppc(FmtConvertContext *c, AVCodecContext *avctx);
111 void ff_fmt_convert_init_x86(FmtConvertContext *c, AVCodecContext *avctx);
112 void ff_fmt_convert_init_mips(FmtConvertContext *c);
114 /* ffdshow custom code */
115 void float_interleave(float *dst, const float **src, long len, int channels);
116 void float_interleave_noscale(float *dst, const float **src, long len, int channels);
118 #endif /* AVCODEC_FMTCONVERT_H */