Imported Debian version 2.5.0~trusty1.1
[deb_ffmpeg.git] / ffmpeg / libavcodec / dct.h
1 /*
2 * (I)DCT Transforms
3 * Copyright (c) 2009 Peter Ross <pross@xvid.org>
4 * Copyright (c) 2010 Alex Converse <alex.converse@gmail.com>
5 * Copyright (c) 2010 Vitor Sessak
6 *
7 * This file is part of FFmpeg.
8 *
9 * FFmpeg is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU Lesser General Public
11 * License as published by the Free Software Foundation; either
12 * version 2.1 of the License, or (at your option) any later version.
13 *
14 * FFmpeg is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * Lesser General Public License for more details.
18 *
19 * You should have received a copy of the GNU Lesser General Public
20 * License along with FFmpeg; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
22 */
23
24 #if !defined(AVCODEC_DCT_H) && (!defined(FFT_FLOAT) || FFT_FLOAT)
25 #define AVCODEC_DCT_H
26
27 #include <stdint.h>
28
29 #include "rdft.h"
30
31 struct DCTContext {
32 int nbits;
33 int inverse;
34 RDFTContext rdft;
35 const float *costab;
36 FFTSample *csc2;
37 void (*dct_calc)(struct DCTContext *s, FFTSample *data);
38 void (*dct32)(FFTSample *out, const FFTSample *in);
39 };
40
41 /**
42 * Set up DCT.
43 * @param nbits size of the input array:
44 * (1 << nbits) for DCT-II, DCT-III and DST-I
45 * (1 << nbits) + 1 for DCT-I
46 *
47 * @note the first element of the input of DST-I is ignored
48 */
49 int ff_dct_init(DCTContext *s, int nbits, enum DCTTransformType type);
50 void ff_dct_end (DCTContext *s);
51
52 void ff_dct_init_x86(DCTContext *s);
53
54 void ff_fdct_ifast(int16_t *data);
55 void ff_fdct_ifast248(int16_t *data);
56 void ff_jpeg_fdct_islow_8(int16_t *data);
57 void ff_jpeg_fdct_islow_10(int16_t *data);
58 void ff_fdct248_islow_8(int16_t *data);
59 void ff_fdct248_islow_10(int16_t *data);
60
61 void ff_j_rev_dct(int16_t *data);
62 void ff_j_rev_dct4(int16_t *data);
63 void ff_j_rev_dct2(int16_t *data);
64 void ff_j_rev_dct1(int16_t *data);
65 void ff_jref_idct_put(uint8_t *dest, int line_size, int16_t *block);
66 void ff_jref_idct_add(uint8_t *dest, int line_size, int16_t *block);
67
68 #endif /* AVCODEC_DCT_H */