FFmpeg: libavcodec/hqx.h Source File

FFmpeg
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,
33   HQX_AC_Q8,
34   HQX_AC_Q16,
35   HQX_AC_Q32,
36   HQX_AC_Q64,
37   HQX_AC_Q128,
38   NUM_HQX_AC
39 };
40 
41  typedef struct HQXLUT {
42   int16_t lev;
43   uint8_t run;
44   int8_t bits;
45 } HQXLUT;
46 
47  typedef struct HQXAC {
48   int lut_bits, extra_bits;
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 {
58   GetBitContext gb;
59   DECLARE_ALIGNED(16, int16_t, block)[16][64];
60 } HQXSlice;
61 
62  typedef struct HQXContext {
63   HQXDSPContext hqxdsp;
64   HQXSlice slice[16];
65 
66   AVFrame *pic;
67   mb_decode_func decode_func;
68 
69   int format, dcb, width, height;
70   int interlaced;
71 
72   uint8_t *src;
73   unsigned int data_size;
74   uint32_t slice_off[17];
75 
76   VLC cbp_vlc;
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 
84 int ff_hqx_init_vlcs(HQXContext *ctx);
85 
86 #endif /* AVCODEC_HQX_H */
HQXAC
Definition: hqx.h:47
HQXContext::dcb
int dcb
Definition: hqx.h:69
HQXContext::slice
HQXSlice slice[16]
Definition: hqx.h:64
HQXContext::height
int height
Definition: hqx.h:69
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:218
HQXContext::interlaced
int interlaced
Definition: hqx.h:70
mem.h
Memory handling functions.
mb_decode_func
int(* mb_decode_func)(struct HQXContext *ctx, int slice_no, int x, int y)
Definition: hqx.h:54
HQXSlice::gb
GetBitContext gb
Definition: hqx.h:58
HQX_AC_Q32
Definition: hqx.h:35
HQXContext::decode_func
mb_decode_func decode_func
Definition: hqx.h:67
ff_hqx_init_vlcs
int ff_hqx_init_vlcs(HQXContext *ctx)
Definition: hqxvlc.c:2151
HQX_AC_Q16
Definition: hqx.h:34
ff_hqx_ac
const HQXAC ff_hqx_ac[NUM_HQX_AC]
Definition: hqxvlc.c:2132
HQXContext::src
uint8_t * src
Definition: hqx.h:72
uint8_t
uint8_t
Definition: audio_convert.c:194
HQXLUT::run
uint8_t run
Definition: hqx.h:43
DECLARE_ALIGNED
#define DECLARE_ALIGNED(n, t, v)
Declare a variable that is aligned in memory.
Definition: mem.h:112
get_bits.h
bitstream reader API header.
HQXAC::lut
const HQXLUT * lut
Definition: hqx.h:49
HQXContext::dc_vlc
VLC dc_vlc[3]
Definition: hqx.h:77
HQXAC::lut_bits
int lut_bits
Definition: hqx.h:48
HQXContext
Definition: hqx.h:62
VLC
Definition: vlc.h:26
frame.h
reference-counted frame API
HQXSlice
Definition: hqx.h:57
HQX_AC_Q64
Definition: hqx.h:36
ctx
AVFormatContext * ctx
Definition: movenc.c:48
HQXAC::extra_bits
int extra_bits
Definition: hqx.h:48
hqxdsp.h
HQX DSP routines.
HQXACMode
HQXACMode
Definition: hqx.h:31
HQXContext::width
int width
Definition: hqx.h:69
HQX_AC_Q0
Definition: hqx.h:32
HQXLUT::bits
int8_t bits
Definition: hqx.h:44
HQXSlice::block
int16_t block[16][64]
Definition: hqx.h:59
HQXLUT
Definition: hqx.h:41
HQXContext::slice_off
uint32_t slice_off[17]
Definition: hqx.h:74
HQXLUT::lev
int16_t lev
Definition: hqx.h:42
int
int
Definition: ffmpeg_filter.c:190
HQXContext::data_size
unsigned int data_size
Definition: hqx.h:73
HQXContext::pic
AVFrame * pic
Definition: hqx.h:66
HQXContext::format
int format
Definition: hqx.h:69
NUM_HQX_AC
Definition: hqx.h:38
HQXContext::cbp_vlc
VLC cbp_vlc
Definition: hqx.h:76
HQX_AC_Q8
Definition: hqx.h:33
HQX_AC_Q128
Definition: hqx.h:37
HQXContext::hqxdsp
HQXDSPContext hqxdsp
Definition: hqx.h:63

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