00001 /* 00002 * MQ-coder 00003 * Copyright (c) 2007 Kamil Nowosad 00004 * 00005 * This file is part of FFmpeg. 00006 * 00007 * FFmpeg is free software; you can redistribute it and/or 00008 * modify it under the terms of the GNU Lesser General Public 00009 * License as published by the Free Software Foundation; either 00010 * version 2.1 of the License, or (at your option) any later version. 00011 * 00012 * FFmpeg is distributed in the hope that it will be useful, 00013 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00014 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00015 * Lesser General Public License for more details. 00016 * 00017 * You should have received a copy of the GNU Lesser General Public 00018 * License along with FFmpeg; if not, write to the Free Software 00019 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 00020 */ 00021 00022 #ifndef AVCODEC_MQC_H 00023 #define AVCODEC_MQC_H 00024 00031 #include "avcodec.h" 00032 00033 #define MQC_CX_UNI 17 00034 #define MQC_CX_RL 18 00035 00036 extern uint16_t ff_mqc_qe[2*47]; 00037 extern uint8_t ff_mqc_nlps[2*47]; 00038 extern uint8_t ff_mqc_nmps[2*47]; 00039 00040 typedef struct { 00041 uint8_t *bp, *bpstart; 00042 unsigned int a; 00043 unsigned int c; 00044 unsigned int ct; 00045 uint8_t cx_states[19]; 00046 } MqcState; 00047 00048 /* encoder */ 00049 00051 void ff_mqc_initenc(MqcState *mqc, uint8_t *bp); 00052 00054 void ff_mqc_encode(MqcState *mqc, uint8_t *cxstate, int d); 00055 00057 int ff_mqc_length(MqcState *mqc); 00058 00060 int ff_mqc_flush(MqcState *mqc); 00061 00062 /* decoder */ 00063 00065 void ff_mqc_initdec(MqcState *mqc, uint8_t *bp); 00066 00068 int ff_mqc_decode(MqcState *mqc, uint8_t *cxstate); 00069 00070 /* common */ 00071 00073 void ff_mqc_init_contexts(MqcState *mqc); 00074 00075 #endif /* AVCODEC_MQC_H */
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