Imported Debian version 2.5.3~trusty1
[deb_ffmpeg.git] / ffmpeg / libavcodec / mqc.h
CommitLineData
2ba45a60
DM
1/*
2 * MQ-coder: structures, common and decoder functions
3 * Copyright (c) 2007 Kamil Nowosad
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22#ifndef AVCODEC_MQC_H
23#define AVCODEC_MQC_H
24
25/**
26 * MQ-coder
27 * @file
28 * @author Kamil Nowosad
29 */
30
31#include <stdint.h>
32
33#define MQC_CX_UNI 17
34#define MQC_CX_RL 18
35
36extern uint16_t ff_mqc_qe[2 * 47];
37extern uint8_t ff_mqc_nlps[2 * 47];
38extern uint8_t ff_mqc_nmps[2 * 47];
39
40typedef struct MqcState {
41 uint8_t *bp, *bpstart;
42 unsigned int a;
43 unsigned int c;
44 unsigned int ct;
45 uint8_t cx_states[19];
46} MqcState;
47
48/* encoder */
49
50/** initialize the encoder */
51void ff_mqc_initenc(MqcState *mqc, uint8_t *bp);
52
53/** code bit d with context cx */
54void ff_mqc_encode(MqcState *mqc, uint8_t *cxstate, int d);
55
56/** number of encoded bytes */
57int ff_mqc_length(MqcState *mqc);
58
59/** flush the encoder [returns number of bytes encoded] */
60int ff_mqc_flush(MqcState *mqc);
61
62/* decoder */
63
64/**
65 * Initialize MQ-decoder.
66 * @param mqc MQ decoder state
67 * @param bp byte poiter
68 */
69void ff_mqc_initdec(MqcState *mqc, uint8_t *bp);
70
71/**
72 * MQ decoder.
73 * @param mqc MQ decoder state
74 * @param cxstate Context
75 * @return Decision (0 ot 1)
76 */
77int ff_mqc_decode(MqcState *mqc, uint8_t *cxstate);
78
79/* common */
80
81/**
82 * MQ-coder Initialize context tables (QE, NLPS, NMPS)
83 */
84void ff_mqc_init_context_tables(void);
85
86/**
87 * MQ-coder context initialisations.
88 * @param mqc MQ-coder context
89 */
90void ff_mqc_init_contexts(MqcState *mqc);
91
92#endif /* AVCODEC_MQC_H */