Commit | Line | Data |
---|---|---|
2ba45a60 DM |
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 */ |