path: root/libavcodec/hq_hqa.h (plain)
blob: 608e2ca1a6efdbba44d3ff5b698c18da61916de4

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 {
36	AVCodecContext *avctx;
37	HQDSPContext hqhqadsp;
38	GetByteContext gbc;
39
40	VLC hq_ac_vlc;
41	VLC hqa_cbp_vlc;
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;
48	int num_slices;
49	int tab_w, tab_h;
50	} HQProfile;
51
52	extern const int32_t * const ff_hq_quants[16][2][4];
53	extern const HQProfile ff_hq_profile[NUM_HQ_PROFILES];
54
55	extern const uint8_t ff_hq_ac_skips[NUM_HQ_AC_ENTRIES];
56	extern const int16_t ff_hq_ac_syms [NUM_HQ_AC_ENTRIES];
57
58	int ff_hq_init_vlcs(HQContext *c);
59
60	#endif /* AVCODEC_HQ_HQA_H */
61