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 36 typedef 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 42 extern DCAVLC ff_dca_vlc_bit_allocation; 43 extern DCAVLC ff_dca_vlc_transition_mode; 44 extern DCAVLC ff_dca_vlc_scale_factor; 45 extern DCAVLC ff_dca_vlc_quant_index[DCA_CODE_BOOKS]; 46 47 extern VLC ff_dca_vlc_tnl_grp[5]; 48 extern VLC ff_dca_vlc_tnl_scf; 49 extern VLC ff_dca_vlc_damp; 50 extern VLC ff_dca_vlc_dph; 51 extern VLC ff_dca_vlc_fst_rsd_amp; 52 extern VLC ff_dca_vlc_rsd_apprx; 53 extern VLC ff_dca_vlc_rsd_amp; 54 extern VLC ff_dca_vlc_avg_g3; 55 extern VLC ff_dca_vlc_st_grid; 56 extern VLC ff_dca_vlc_grid_2; 57 extern VLC ff_dca_vlc_grid_3; 58 extern VLC ff_dca_vlc_rsd; 59 60 av_cold void ff_dca_init_vlcs(void); 61 uint32_t ff_dca_vlc_calc_quant_bits(int *values, uint8_t n, uint8_t sel, uint8_t abits); 62 void ff_dca_vlc_enc_quant(PutBitContext *pb, int *values, uint8_t n, uint8_t sel, uint8_t abits); 63 uint32_t ff_dca_vlc_calc_alloc_bits(int *values, uint8_t n, uint8_t sel); 64 void ff_dca_vlc_enc_alloc(PutBitContext *pb, int *values, uint8_t n, uint8_t sel); 65 66 #endif /* AVCODEC_DCAHUFF_H */ 67