/*

  * 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 */