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hqx.h
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1 /*
2  * Canopus HQX decoder
3  *
4  * This file is part of FFmpeg.
5  *
6  * FFmpeg is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * FFmpeg is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with FFmpeg; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20 
21 #ifndef AVCODEC_HQX_H
22 #define AVCODEC_HQX_H
23 
24 #include <stdint.h>
25 
26 #include "libavutil/frame.h"
27 #include "libavutil/mem.h"
28 #include "get_bits.h"
29 #include "hqxdsp.h"
30 
31 enum HQXACMode {
32  HQX_AC_Q0 = 0,
39 };
40 
41 typedef struct HQXLUT {
42  int16_t lev;
44  int8_t bits;
45 } HQXLUT;
46 
47 typedef struct HQXAC {
49  const HQXLUT *lut;
50 } HQXAC;
51 
52 struct HQXContext;
53 
54 typedef int (*mb_decode_func)(struct HQXContext *ctx,
55  int slice_no, int x, int y);
56 
57 typedef struct HQXSlice {
59  DECLARE_ALIGNED(16, int16_t, block)[16][64];
60 } HQXSlice;
61 
62 typedef struct HQXContext {
65 
68 
71 
73  unsigned int data_size;
74  uint32_t slice_off[17];
75 
77  VLC dc_vlc[3];
78 } HQXContext;
79 
80 #define HQX_DC_VLC_BITS 9
81 
82 extern const HQXAC ff_hqx_ac[NUM_HQX_AC];
83 
85 
86 #endif /* AVCODEC_HQX_H */
Definition: hqx.h:47
int dcb
Definition: hqx.h:69
HQXSlice slice[16]
Definition: hqx.h:64
int height
Definition: hqx.h:69
This structure describes decoded (raw) audio or video data.
Definition: frame.h:201
int interlaced
Definition: hqx.h:70
Memory handling functions.
int(* mb_decode_func)(struct HQXContext *ctx, int slice_no, int x, int y)
Definition: hqx.h:54
GetBitContext gb
Definition: hqx.h:58
Definition: hqx.h:35
mb_decode_func decode_func
Definition: hqx.h:67
int ff_hqx_init_vlcs(HQXContext *ctx)
Definition: hqxvlc.c:2151
Definition: hqx.h:34
const HQXAC ff_hqx_ac[NUM_HQX_AC]
Definition: hqxvlc.c:2132
uint8_t * src
Definition: hqx.h:72
uint8_t
uint8_t run
Definition: hqx.h:43
#define DECLARE_ALIGNED(n, t, v)
Declare a variable that is aligned in memory.
Definition: mem.h:112
bitstream reader API header.
const HQXLUT * lut
Definition: hqx.h:49
VLC dc_vlc[3]
Definition: hqx.h:77
int lut_bits
Definition: hqx.h:48
Definition: hqx.h:62
Definition: vlc.h:26
reference-counted frame API
Definition: hqx.h:57
Definition: hqx.h:36
AVFormatContext * ctx
Definition: movenc.c:48
int extra_bits
Definition: hqx.h:48
HQX DSP routines.
HQXACMode
Definition: hqx.h:31
int width
Definition: hqx.h:69
Definition: hqx.h:32
int8_t bits
Definition: hqx.h:44
int16_t block[16][64]
Definition: hqx.h:59
Definition: hqx.h:41
uint32_t slice_off[17]
Definition: hqx.h:74
int16_t lev
Definition: hqx.h:42
int
unsigned int data_size
Definition: hqx.h:73
AVFrame * pic
Definition: hqx.h:66
int format
Definition: hqx.h:69
Definition: hqx.h:38
VLC cbp_vlc
Definition: hqx.h:76
Definition: hqx.h:33
HQXDSPContext hqxdsp
Definition: hqx.h:63