1/* 2 * DCA compatible decoder - huffman tables 3 * Copyright (C) 2004 Gildas Bazin 4 * Copyright (C) 2007 Konstantin Shishkov 5 * 6 * This file is part of FFmpeg. 7 * 8 * FFmpeg is free software; you can redistribute it and/or 9 * modify it under the terms of the GNU Lesser General Public 10 * License as published by the Free Software Foundation; either 11 * version 2.1 of the License, or (at your option) any later version. 12 * 13 * FFmpeg is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 16 * Lesser General Public License for more details. 17 * 18 * You should have received a copy of the GNU Lesser General Public 19 * License along with FFmpeg; if not, write to the Free Software 20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 21 */ 22 23#ifndef AVCODEC_DCAHUFF_H 24#define AVCODEC_DCAHUFF_H 25 26#include <stdint.h> 27 28#include "libavutil/attributes.h" 29 30#include "put_bits.h" 31#include "vlc.h" 32 33#define DCA_CODE_BOOKS 10 34#define DCA_BITALLOC_12_COUNT 5 35 36typedef struct DCAVLC { 37 int offset; ///< Code values offset 38 int max_depth; ///< Parameter for get_vlc2() 39 VLC vlc[7]; ///< Actual codes 40} DCAVLC; 41 42extern DCAVLC ff_dca_vlc_bit_allocation; 43extern DCAVLC ff_dca_vlc_transition_mode; 44extern DCAVLC ff_dca_vlc_scale_factor; 45extern DCAVLC ff_dca_vlc_quant_index[DCA_CODE_BOOKS]; 46 47extern VLC ff_dca_vlc_tnl_grp[5]; 48extern VLC ff_dca_vlc_tnl_scf; 49extern VLC ff_dca_vlc_damp; 50extern VLC ff_dca_vlc_dph; 51extern VLC ff_dca_vlc_fst_rsd_amp; 52extern VLC ff_dca_vlc_rsd_apprx; 53extern VLC ff_dca_vlc_rsd_amp; 54extern VLC ff_dca_vlc_avg_g3; 55extern VLC ff_dca_vlc_st_grid; 56extern VLC ff_dca_vlc_grid_2; 57extern VLC ff_dca_vlc_grid_3; 58extern VLC ff_dca_vlc_rsd; 59 60av_cold void ff_dca_init_vlcs(void); 61uint32_t ff_dca_vlc_calc_quant_bits(int *values, uint8_t n, uint8_t sel, uint8_t abits); 62void ff_dca_vlc_enc_quant(PutBitContext *pb, int *values, uint8_t n, uint8_t sel, uint8_t abits); 63uint32_t ff_dca_vlc_calc_alloc_bits(int *values, uint8_t n, uint8_t sel); 64void ff_dca_vlc_enc_alloc(PutBitContext *pb, int *values, uint8_t n, uint8_t sel); 65 66#endif /* AVCODEC_DCAHUFF_H */ 67