aac5773f
 hucm
功能基本完成，接口待打磨
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/*
* DCA compatible decoder - huffman tables
* Copyright (C) 2004 Gildas Bazin
* Copyright (C) 2007 Konstantin Shishkov
*
* 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_DCAHUFF_H
#define AVCODEC_DCAHUFF_H
#include "libavutil/common.h"
#include "avcodec.h"
#include "get_bits.h"
#include "put_bits.h"
#define DCA_CODE_BOOKS 10
#define DCA_BITALLOC_12_COUNT 5
typedef struct DCAVLC {
int offset; ///< Code values offset
int max_depth; ///< Parameter for get_vlc2()
VLC vlc[7]; ///< Actual codes
} DCAVLC;
extern DCAVLC ff_dca_vlc_bit_allocation;
extern DCAVLC ff_dca_vlc_transition_mode;
extern DCAVLC ff_dca_vlc_scale_factor;
extern DCAVLC ff_dca_vlc_quant_index[DCA_CODE_BOOKS];
extern VLC ff_dca_vlc_tnl_grp[5];
extern VLC ff_dca_vlc_tnl_scf;
extern VLC ff_dca_vlc_damp;
extern VLC ff_dca_vlc_dph;
extern VLC ff_dca_vlc_fst_rsd_amp;
extern VLC ff_dca_vlc_rsd_apprx;
extern VLC ff_dca_vlc_rsd_amp;
extern VLC ff_dca_vlc_avg_g3;
extern VLC ff_dca_vlc_st_grid;
extern VLC ff_dca_vlc_grid_2;
extern VLC ff_dca_vlc_grid_3;
extern VLC ff_dca_vlc_rsd;
av_cold void ff_dca_init_vlcs(void);
uint32_t ff_dca_vlc_calc_quant_bits(int *values, uint8_t n, uint8_t sel, uint8_t abits);
void ff_dca_vlc_enc_quant(PutBitContext *pb, int *values, uint8_t n, uint8_t sel, uint8_t abits);
uint32_t ff_dca_vlc_calc_alloc_bits(int *values, uint8_t n, uint8_t sel);
void ff_dca_vlc_enc_alloc(PutBitContext *pb, int *values, uint8_t n, uint8_t sel);
#endif /* AVCODEC_DCAHUFF_H */
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