mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-28 20:53:54 +02:00
c81a706381
Based on the 2007 GSoC project from Kamil Nowosad <k.nowosad@students.mimuw.edu.pl> Updated to current programming standards, style and many more small fixes by Diego Biurrun <diego@biurrun.de>. Signed-off-by: Diego Biurrun <diego@biurrun.de>
74 lines
1.7 KiB
C
74 lines
1.7 KiB
C
/*
|
|
* MQ-coder: structures, common and decoder functions
|
|
* Copyright (c) 2007 Kamil Nowosad
|
|
*
|
|
* This file is part of Libav.
|
|
*
|
|
* Libav 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.
|
|
*
|
|
* Libav 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 Libav; 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;
|
|
|
|
/* 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 context initialisations.
|
|
* @param mqc MQ-coder context
|
|
*/
|
|
void ff_mqc_init_contexts(MqcState *mqc);
|
|
|
|
#endif /* AVCODEC_MQC_H */
|