| 0,0 → 1,92 |
|---|
| /* |
| * MQ-coder: structures, common and decoder functions |
| * Copyright (c) 2007 Kamil Nowosad |
| * |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * FFmpeg is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with FFmpeg; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| #ifndef AVCODEC_MQC_H |
| #define AVCODEC_MQC_H |
| |
| /** |
| * MQ-coder |
| * @file |
| * @author Kamil Nowosad |
| */ |
| |
| #include <stdint.h> |
| |
| #define MQC_CX_UNI 17 |
| #define MQC_CX_RL 18 |
| |
| extern uint16_t ff_mqc_qe[2 * 47]; |
| extern uint8_t ff_mqc_nlps[2 * 47]; |
| extern uint8_t ff_mqc_nmps[2 * 47]; |
| |
| typedef struct MqcState { |
| uint8_t *bp, *bpstart; |
| unsigned int a; |
| unsigned int c; |
| unsigned int ct; |
| uint8_t cx_states[19]; |
| } MqcState; |
| |
| /* encoder */ |
| |
| /** initialize the encoder */ |
| void ff_mqc_initenc(MqcState *mqc, uint8_t *bp); |
| |
| /** code bit d with context cx */ |
| void ff_mqc_encode(MqcState *mqc, uint8_t *cxstate, int d); |
| |
| /** number of encoded bytes */ |
| int ff_mqc_length(MqcState *mqc); |
| |
| /** flush the encoder [returns number of bytes encoded] */ |
| int ff_mqc_flush(MqcState *mqc); |
| |
| /* decoder */ |
| |
| /** |
| * Initialize MQ-decoder. |
| * @param mqc MQ decoder state |
| * @param bp byte poiter |
| */ |
| void ff_mqc_initdec(MqcState *mqc, uint8_t *bp); |
| |
| /** |
| * MQ decoder. |
| * @param mqc MQ decoder state |
| * @param cxstate Context |
| * @return Decision (0 ot 1) |
| */ |
| int ff_mqc_decode(MqcState *mqc, uint8_t *cxstate); |
| |
| /* common */ |
| |
| /** |
| * MQ-coder Initialize context tables (QE, NLPS, NMPS) |
| */ |
| void ff_mqc_init_context_tables(void); |
| |
| /** |
| * MQ-coder context initialisations. |
| * @param mqc MQ-coder context |
| */ |
| void ff_mqc_init_contexts(MqcState *mqc); |
| |
| #endif /* AVCODEC_MQC_H */ |