repositories / deb_ffmpeg.git / blame
| Commit | Line | Data |
|---|---|---|
| 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 | ||
| 36 | extern uint16_t ff_mqc_qe[2 * 47]; | |
| 37 | extern uint8_t ff_mqc_nlps[2 * 47]; | |
| 38 | extern uint8_t ff_mqc_nmps[2 * 47]; | |
| 39 | ||
| 40 | typedef 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 */ | |
| 51 | void ff_mqc_initenc(MqcState *mqc, uint8_t *bp); | |
| 52 | ||
| 53 | /** code bit d with context cx */ | |
| 54 | void ff_mqc_encode(MqcState *mqc, uint8_t *cxstate, int d); | |
| 55 | ||
| 56 | /** number of encoded bytes */ | |
| 57 | int ff_mqc_length(MqcState *mqc); | |
| 58 | ||
| 59 | /** flush the encoder [returns number of bytes encoded] */ | |
| 60 | int 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 | */ | |
| 69 | void 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 | */ | |
| 77 | int ff_mqc_decode(MqcState *mqc, uint8_t *cxstate); | |
| 78 | ||
| 79 | /* common */ | |
| 80 | ||
| 81 | /** | |
| 82 | * MQ-coder Initialize context tables (QE, NLPS, NMPS) | |
| 83 | */ | |
| 84 | void ff_mqc_init_context_tables(void); | |
| 85 | ||
| 86 | /** | |
| 87 | * MQ-coder context initialisations. | |
| 88 | * @param mqc MQ-coder context | |
| 89 | */ | |
| 90 | void ff_mqc_init_contexts(MqcState *mqc); | |
| 91 | ||
| 92 | #endif /* AVCODEC_MQC_H */ |