Details | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 4349 | Serge | 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 |
||
| 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 */ |