author | Wuzzy <almikes@aol.com> |
Sat, 15 Apr 2017 06:52:14 +0200 | |
changeset 12256 | 789277d46784 |
parent 7813 | 7ac83d79b897 |
permissions | -rw-r--r-- |
7813
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
1 |
/* |
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
2 |
* This file is part of Libav. |
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
3 |
* |
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
4 |
* Libav is free software; you can redistribute it and/or |
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
5 |
* modify it under the terms of the GNU Lesser General Public |
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
6 |
* License as published by the Free Software Foundation; either |
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
7 |
* version 2.1 of the License, or (at your option) any later version. |
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
8 |
* |
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
9 |
* Libav is distributed in the hope that it will be useful, |
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
10 |
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
11 |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
12 |
* Lesser General Public License for more details. |
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
13 |
* |
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
14 |
* You should have received a copy of the GNU Lesser General Public |
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
15 |
* License along with Libav; if not, write to the Free Software |
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
16 |
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
17 |
*/ |
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
18 |
|
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
19 |
#ifndef AVCODEC_AVFFT_H |
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
20 |
#define AVCODEC_AVFFT_H |
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
21 |
|
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
22 |
/** |
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
23 |
* @file |
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
24 |
* @ingroup lavc_fft |
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
25 |
* FFT functions |
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
26 |
*/ |
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
27 |
|
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
28 |
/** |
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
29 |
* @defgroup lavc_fft FFT functions |
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
30 |
* @ingroup lavc_misc |
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
31 |
* |
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
32 |
* @{ |
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
33 |
*/ |
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
34 |
|
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
35 |
typedef float FFTSample; |
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
36 |
|
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
37 |
typedef struct FFTComplex { |
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
38 |
FFTSample re, im; |
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
39 |
} FFTComplex; |
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
40 |
|
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
41 |
typedef struct FFTContext FFTContext; |
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
42 |
|
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
43 |
/** |
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
44 |
* Set up a complex FFT. |
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
45 |
* @param nbits log2 of the length of the input array |
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
46 |
* @param inverse if 0 perform the forward transform, if 1 perform the inverse |
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
47 |
*/ |
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
48 |
FFTContext *av_fft_init(int nbits, int inverse); |
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
49 |
|
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
50 |
/** |
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
51 |
* Do the permutation needed BEFORE calling ff_fft_calc(). |
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
52 |
*/ |
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
53 |
void av_fft_permute(FFTContext *s, FFTComplex *z); |
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
54 |
|
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
55 |
/** |
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
56 |
* Do a complex FFT with the parameters defined in av_fft_init(). The |
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
57 |
* input data must be permuted before. No 1.0/sqrt(n) normalization is done. |
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
58 |
*/ |
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
59 |
void av_fft_calc(FFTContext *s, FFTComplex *z); |
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
60 |
|
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
61 |
void av_fft_end(FFTContext *s); |
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
62 |
|
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
63 |
FFTContext *av_mdct_init(int nbits, int inverse, double scale); |
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
64 |
void av_imdct_calc(FFTContext *s, FFTSample *output, const FFTSample *input); |
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
65 |
void av_imdct_half(FFTContext *s, FFTSample *output, const FFTSample *input); |
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
66 |
void av_mdct_calc(FFTContext *s, FFTSample *output, const FFTSample *input); |
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
67 |
void av_mdct_end(FFTContext *s); |
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
68 |
|
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
69 |
/* Real Discrete Fourier Transform */ |
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
70 |
|
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
71 |
enum RDFTransformType { |
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
72 |
DFT_R2C, |
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
73 |
IDFT_C2R, |
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
74 |
IDFT_R2C, |
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
75 |
DFT_C2R, |
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
76 |
}; |
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
77 |
|
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
78 |
typedef struct RDFTContext RDFTContext; |
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
79 |
|
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
80 |
/** |
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
81 |
* Set up a real FFT. |
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
82 |
* @param nbits log2 of the length of the input array |
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
83 |
* @param trans the type of transform |
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
84 |
*/ |
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
85 |
RDFTContext *av_rdft_init(int nbits, enum RDFTransformType trans); |
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
86 |
void av_rdft_calc(RDFTContext *s, FFTSample *data); |
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
87 |
void av_rdft_end(RDFTContext *s); |
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
88 |
|
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
89 |
/* Discrete Cosine Transform */ |
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
90 |
|
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
91 |
typedef struct DCTContext DCTContext; |
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
92 |
|
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
93 |
enum DCTTransformType { |
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
94 |
DCT_II = 0, |
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
95 |
DCT_III, |
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
96 |
DCT_I, |
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
97 |
DST_I, |
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
98 |
}; |
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
99 |
|
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
100 |
/** |
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
101 |
* Set up DCT. |
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
102 |
* @param nbits size of the input array: |
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
103 |
* (1 << nbits) for DCT-II, DCT-III and DST-I |
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
104 |
* (1 << nbits) + 1 for DCT-I |
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
105 |
* |
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
106 |
* @note the first element of the input of DST-I is ignored |
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
107 |
*/ |
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
108 |
DCTContext *av_dct_init(int nbits, enum DCTTransformType type); |
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
109 |
void av_dct_calc(DCTContext *s, FFTSample *data); |
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
110 |
void av_dct_end (DCTContext *s); |
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
111 |
|
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
112 |
/** |
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
113 |
* @} |
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
114 |
*/ |
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
115 |
|
7ac83d79b897
support video recording on windows with automation and headers
koda
parents:
diff
changeset
|
116 |
#endif /* AVCODEC_AVFFT_H */ |