FFmpeg
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
hq_hqa.h
Go to the documentation of this file.
1 /*
2  * Canopus HQ/HQA 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_HQ_HQA_H
22 #define AVCODEC_HQ_HQA_H
23 
24 #include <stdint.h>
25 
26 #include "avcodec.h"
27 #include "bytestream.h"
28 #include "hq_hqadsp.h"
29 #include "vlc.h"
30 
31 #define NUM_HQ_AC_ENTRIES 746
32 #define NUM_HQ_PROFILES 22
33 #define NUM_HQ_QUANTS 16
34 
35 typedef struct HQContext {
39 
42  DECLARE_ALIGNED(16, int16_t, block)[12][64];
43 } HQContext;
44 
45 typedef struct HQProfile {
46  const uint8_t *perm_tab;
47  int width, height;
49  int tab_w, tab_h;
50 } HQProfile;
51 
52 extern const int32_t * const ff_hq_quants[16][2][4];
54 
56 extern const int16_t ff_hq_ac_syms [NUM_HQ_AC_ENTRIES];
57 
59 
60 #endif /* AVCODEC_HQ_HQA_H */
int width
Definition: hq_hqa.h:47
int16_t block[12][64]
Definition: hq_hqa.h:42
const int32_t *const ff_hq_quants[16][2][4]
Definition: hq_hqadata.c:1126
const HQProfile ff_hq_profile[NUM_HQ_PROFILES]
Definition: hq_hqadata.c:8343
const uint8_t * perm_tab
Definition: hq_hqa.h:46
VLC hq_ac_vlc
Definition: hq_hqa.h:40
HQ/HQA variant of AAN IDCT It differs from the standard AAN IDCT in precision and in the second stage...
uint8_t
#define DECLARE_ALIGNED(n, t, v)
Declare a variable that is aligned in memory.
Definition: mem.h:112
int num_slices
Definition: hq_hqa.h:48
int tab_h
Definition: hq_hqa.h:49
VLC hqa_cbp_vlc
Definition: hq_hqa.h:41
Definition: vlc.h:26
int ff_hq_init_vlcs(HQContext *c)
Definition: hq_hqadata.c:8368
int32_t
#define NUM_HQ_AC_ENTRIES
Definition: hq_hqa.h:31
#define NUM_HQ_PROFILES
Definition: hq_hqa.h:32
GetByteContext gbc
Definition: hq_hqa.h:38
Libavcodec external API header.
main external API structure.
Definition: avcodec.h:1488
const int16_t ff_hq_ac_syms[NUM_HQ_AC_ENTRIES]
Definition: hq_hqadata.c:1342
int tab_w
Definition: hq_hqa.h:49
static double c[64]
AVCodecContext * avctx
Definition: hq_hqa.h:36
HQDSPContext hqhqadsp
Definition: hq_hqa.h:37
int height
Definition: hq_hqa.h:47
const uint8_t ff_hq_ac_skips[NUM_HQ_AC_ENTRIES]
Definition: hq_hqadata.c:1292