1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
|
/*
* Canopus HQX decoder
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVCODEC_HQX_H
#define AVCODEC_HQX_H
#include <stdint.h>
#include "libavutil/mem.h"
#include "get_bits.h"
enum HQXACMode {
HQX_AC_Q0 = 0,
HQX_AC_Q8,
HQX_AC_Q16,
HQX_AC_Q32,
HQX_AC_Q64,
HQX_AC_Q128,
NUM_HQX_AC
};
typedef struct HQXLUT {
int16_t lev;
uint8_t run;
int8_t bits;
} HQXLUT;
typedef struct HQXAC {
int lut_bits, extra_bits;
const HQXLUT *lut;
} HQXAC;
typedef struct HQXSliceData
{
DECLARE_ALIGNED(16, int16_t, block)[16][64];
} HQXSliceData;
typedef struct HQXContext {
int format, dcb, width, height;
int interlaced;
HQXSliceData slice[17];
VLC cbp_vlc;
VLC dc_vlc[3];
} HQXContext;
#define HQX_DC_VLC_BITS 9
extern const HQXAC ff_hqx_ac[NUM_HQX_AC];
int ff_hqx_init_vlcs(HQXContext *ctx);
#endif /* AVCODEC_HQX_H */
|
