2 * This file is part of FFmpeg.
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.
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.
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
19 #include "libavutil/mem.h"
25 FFTContext *av_fft_init(int nbits, int inverse)
27 FFTContext *s = av_malloc(sizeof(*s));
29 if (s && ff_fft_init(s, nbits, inverse))
35 void av_fft_permute(FFTContext *s, FFTComplex *z)
40 void av_fft_calc(FFTContext *s, FFTComplex *z)
45 void av_fft_end(FFTContext *s)
55 FFTContext *av_mdct_init(int nbits, int inverse, double scale)
57 FFTContext *s = av_malloc(sizeof(*s));
59 if (s && ff_mdct_init(s, nbits, inverse, scale))
65 void av_imdct_calc(FFTContext *s, FFTSample *output, const FFTSample *input)
67 s->imdct_calc(s, output, input);
70 void av_imdct_half(FFTContext *s, FFTSample *output, const FFTSample *input)
72 s->imdct_half(s, output, input);
75 void av_mdct_calc(FFTContext *s, FFTSample *output, const FFTSample *input)
77 s->mdct_calc(s, output, input);
80 void av_mdct_end(FFTContext *s)
88 #endif /* CONFIG_MDCT */
92 RDFTContext *av_rdft_init(int nbits, enum RDFTransformType trans)
94 RDFTContext *s = av_malloc(sizeof(*s));
96 if (s && ff_rdft_init(s, nbits, trans))
102 void av_rdft_calc(RDFTContext *s, FFTSample *data)
104 ff_rdft_calc(s, data);
107 void av_rdft_end(RDFTContext *s)
115 #endif /* CONFIG_RDFT */
119 DCTContext *av_dct_init(int nbits, enum DCTTransformType inverse)
121 DCTContext *s = av_malloc(sizeof(*s));
123 if (s && ff_dct_init(s, nbits, inverse))
129 void av_dct_calc(DCTContext *s, FFTSample *data)
131 ff_dct_calc(s, data);
134 void av_dct_end(DCTContext *s)
142 #endif /* CONFIG_DCT */