blob: 2200f37708f0efee4a6ab09faf80cc47840c6f19
1 | /* |
2 | * This file is part of FFmpeg. |
3 | * |
4 | * FFmpeg is free software; you can redistribute it and/or |
5 | * modify it under the terms of the GNU Lesser General Public |
6 | * License as published by the Free Software Foundation; either |
7 | * version 2.1 of the License, or (at your option) any later version. |
8 | * |
9 | * FFmpeg is distributed in the hope that it will be useful, |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
12 | * Lesser General Public License for more details. |
13 | * |
14 | * You should have received a copy of the GNU Lesser General Public |
15 | * License along with FFmpeg; if not, write to the Free Software |
16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
17 | */ |
18 | |
19 | #include "libavutil/attributes.h" |
20 | #include "libavutil/mem.h" |
21 | #include "avfft.h" |
22 | #include "fft.h" |
23 | #include "rdft.h" |
24 | #include "dct.h" |
25 | |
26 | /* FFT */ |
27 | |
28 | FFTContext *av_fft_init(int nbits, int inverse) |
29 | { |
30 | FFTContext *s = av_mallocz(sizeof(*s)); |
31 | |
32 | if (s && ff_fft_init(s, nbits, inverse)) |
33 | av_freep(&s); |
34 | |
35 | return s; |
36 | } |
37 | |
38 | void av_fft_permute(FFTContext *s, FFTComplex *z) |
39 | { |
40 | s->fft_permute(s, z); |
41 | } |
42 | |
43 | void av_fft_calc(FFTContext *s, FFTComplex *z) |
44 | { |
45 | s->fft_calc(s, z); |
46 | } |
47 | |
48 | av_cold void av_fft_end(FFTContext *s) |
49 | { |
50 | if (s) { |
51 | ff_fft_end(s); |
52 | av_free(s); |
53 | } |
54 | } |
55 | |
56 | #if CONFIG_MDCT |
57 | |
58 | FFTContext *av_mdct_init(int nbits, int inverse, double scale) |
59 | { |
60 | FFTContext *s = av_malloc(sizeof(*s)); |
61 | |
62 | if (s && ff_mdct_init(s, nbits, inverse, scale)) |
63 | av_freep(&s); |
64 | |
65 | return s; |
66 | } |
67 | |
68 | void av_imdct_calc(FFTContext *s, FFTSample *output, const FFTSample *input) |
69 | { |
70 | s->imdct_calc(s, output, input); |
71 | } |
72 | |
73 | void av_imdct_half(FFTContext *s, FFTSample *output, const FFTSample *input) |
74 | { |
75 | s->imdct_half(s, output, input); |
76 | } |
77 | |
78 | void av_mdct_calc(FFTContext *s, FFTSample *output, const FFTSample *input) |
79 | { |
80 | s->mdct_calc(s, output, input); |
81 | } |
82 | |
83 | av_cold void av_mdct_end(FFTContext *s) |
84 | { |
85 | if (s) { |
86 | ff_mdct_end(s); |
87 | av_free(s); |
88 | } |
89 | } |
90 | |
91 | #endif /* CONFIG_MDCT */ |
92 | |
93 | #if CONFIG_RDFT |
94 | |
95 | RDFTContext *av_rdft_init(int nbits, enum RDFTransformType trans) |
96 | { |
97 | RDFTContext *s = av_malloc(sizeof(*s)); |
98 | |
99 | if (s && ff_rdft_init(s, nbits, trans)) |
100 | av_freep(&s); |
101 | |
102 | return s; |
103 | } |
104 | |
105 | void av_rdft_calc(RDFTContext *s, FFTSample *data) |
106 | { |
107 | s->rdft_calc(s, data); |
108 | } |
109 | |
110 | av_cold void av_rdft_end(RDFTContext *s) |
111 | { |
112 | if (s) { |
113 | ff_rdft_end(s); |
114 | av_free(s); |
115 | } |
116 | } |
117 | |
118 | #endif /* CONFIG_RDFT */ |
119 | |
120 | #if CONFIG_DCT |
121 | |
122 | DCTContext *av_dct_init(int nbits, enum DCTTransformType inverse) |
123 | { |
124 | DCTContext *s = av_malloc(sizeof(*s)); |
125 | |
126 | if (s && ff_dct_init(s, nbits, inverse)) |
127 | av_freep(&s); |
128 | |
129 | return s; |
130 | } |
131 | |
132 | void av_dct_calc(DCTContext *s, FFTSample *data) |
133 | { |
134 | s->dct_calc(s, data); |
135 | } |
136 | |
137 | av_cold void av_dct_end(DCTContext *s) |
138 | { |
139 | if (s) { |
140 | ff_dct_end(s); |
141 | av_free(s); |
142 | } |
143 | } |
144 | |
145 | #endif /* CONFIG_DCT */ |
146 |