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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 | */ | |
53 | void (*int32_to_float_fmul_array8)(struct FmtConvertContext *c, | |
54 | float *dst, const int32_t *src, | |
55 | const float *mul, int len); | |
56 | ||
57 | /** | |
58 | * Convert an array of float to an array of int16_t. | |
59 | * | |
60 | * Convert floats from in the range [-32768.0,32767.0] to ints | |
61 | * without rescaling | |
62 | * | |
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 | |
69 | */ | |
70 | void (*float_to_int16)(int16_t *dst, const float *src, long len); | |
71 | ||
72 | /** | |
73 | * Convert multiple arrays of float to an interleaved array of int16_t. | |
74 | * | |
75 | * Convert floats from in the range [-32768.0,32767.0] to ints | |
76 | * without rescaling | |
77 | * | |
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 | |
85 | */ | |
86 | void (*float_to_int16_interleave)(int16_t *dst, const float **src, | |
87 | long len, int channels); | |
88 | ||
89 | /** | |
90 | * Convert multiple arrays of float to an array of interleaved float. | |
91 | * | |
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 | |
99 | */ | |
100 | void (*float_interleave)(float *dst, const float **src, unsigned int len, | |
101 | int channels); | |
102 | } FmtConvertContext; | |
103 | ||
104 | void ff_float_interleave_c(float *dst, const float **src, unsigned int len, | |
105 | int channels); | |
106 | ||
107 | void ff_fmt_convert_init(FmtConvertContext *c, AVCodecContext *avctx); | |
108 | ||
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); | |
113 | ||
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); | |
117 | ||
118 | #endif /* AVCODEC_FMTCONVERT_H */ |