Imported Debian version 2.5.3~trusty1
[deb_ffmpeg.git] / ffmpeg / libavcodec / avfft.c
CommitLineData
2ba45a60
DM
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
28FFTContext *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
38void av_fft_permute(FFTContext *s, FFTComplex *z)
39{
40 s->fft_permute(s, z);
41}
42
43void av_fft_calc(FFTContext *s, FFTComplex *z)
44{
45 s->fft_calc(s, z);
46}
47
48av_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
58FFTContext *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
68void av_imdct_calc(FFTContext *s, FFTSample *output, const FFTSample *input)
69{
70 s->imdct_calc(s, output, input);
71}
72
73void av_imdct_half(FFTContext *s, FFTSample *output, const FFTSample *input)
74{
75 s->imdct_half(s, output, input);
76}
77
78void av_mdct_calc(FFTContext *s, FFTSample *output, const FFTSample *input)
79{
80 s->mdct_calc(s, output, input);
81}
82
83av_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
95RDFTContext *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
105void av_rdft_calc(RDFTContext *s, FFTSample *data)
106{
107 s->rdft_calc(s, data);
108}
109
110av_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
122DCTContext *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
132void av_dct_calc(DCTContext *s, FFTSample *data)
133{
134 s->dct_calc(s, data);
135}
136
137av_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 */