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