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fmtconvert.h
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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 #ifndef AVCODEC_FMTCONVERT_H
24 #define AVCODEC_FMTCONVERT_H
25 
26 #include "avcodec.h"
27 
28 typedef struct FmtConvertContext {
29  /**
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
37  */
38  void (*int32_to_float_fmul_scalar)(float *dst, const int32_t *src,
39  float mul, int len);
40 
41  /**
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
52  */
54  float *dst, const int32_t *src,
55  const float *mul, int len);
56 
58 
60 
65 
66 /* ffdshow custom code */
67 void float_interleave(float *dst, const float **src, long len, int channels);
68 void float_interleave_noscale(float *dst, const float **src, long len, int channels);
69 
70 #endif /* AVCODEC_FMTCONVERT_H */