Imported Debian version 2.5.3~trusty1
[deb_ffmpeg.git] / ffmpeg / libavcodec / opus_imdct.h
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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#ifndef AVCODEC_OPUS_IMDCT_H
20#define AVCODEC_OPUS_IMDCT_H
21
22#include <stddef.h>
23
24#include "avfft.h"
25
26typedef struct CeltIMDCTContext {
27 int fft_n;
28 int len2;
29 int len4;
30
31 FFTComplex *tmp;
32
33 FFTComplex *twiddle_exptab;
34
35 FFTComplex *exptab[6];
36
37 /**
38 * Calculate the middle half of the iMDCT
39 */
40 void (*imdct_half)(struct CeltIMDCTContext *s, float *dst, const float *src,
41 ptrdiff_t src_stride, float scale);
42} CeltIMDCTContext;
43
44/**
45 * Init an iMDCT of the length 2 * 15 * (2^N)
46 */
47int ff_celt_imdct_init(CeltIMDCTContext **s, int N);
48
49/**
50 * Free an iMDCT.
51 */
52void ff_celt_imdct_uninit(CeltIMDCTContext **s);
53
54
55void ff_celt_imdct_init_aarch64(CeltIMDCTContext *s);
56
57#endif /* AVCODEC_OPUS_IMDCT_H */