mpegaudiodata.h (2642B)
1 /* 2 * MPEG Audio common tables 3 * copyright (c) 2002 Fabrice Bellard 4 * 5 * This file is part of FFmpeg. 6 * 7 * FFmpeg is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU Lesser General Public 9 * License as published by the Free Software Foundation; either 10 * version 2.1 of the License, or (at your option) any later version. 11 * 12 * FFmpeg is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 15 * Lesser General Public License for more details. 16 * 17 * You should have received a copy of the GNU Lesser General Public 18 * License along with FFmpeg; if not, write to the Free Software 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 20 */ 21 22 /** 23 * @file 24 * mpeg audio layer common tables. 25 */ 26 27 #ifndef AVCODEC_MPEGAUDIODATA_H 28 #define AVCODEC_MPEGAUDIODATA_H 29 30 #include <stdint.h> 31 32 #include "config.h" 33 34 #include "libavutil/attributes_internal.h" 35 #include "vlc.h" 36 37 #define MODE_EXT_MS_STEREO 2 38 #define MODE_EXT_I_STEREO 1 39 40 FF_VISIBILITY_PUSH_HIDDEN 41 extern const uint16_t ff_mpa_bitrate_tab[2][3][15]; 42 extern const uint16_t ff_mpa_freq_tab[3]; 43 extern const int ff_mpa_sblimit_table[5]; 44 extern const int ff_mpa_quant_steps[17]; 45 extern const int ff_mpa_quant_bits[17]; 46 extern const unsigned char * const ff_mpa_alloc_tables[5]; 47 48 #define TABLE_4_3_SIZE ((8191 + 16)*4) 49 #if CONFIG_HARDCODED_TABLES 50 extern const int8_t ff_table_4_3_exp [TABLE_4_3_SIZE]; 51 extern const uint32_t ff_table_4_3_value[TABLE_4_3_SIZE]; 52 #else 53 extern int8_t ff_table_4_3_exp [TABLE_4_3_SIZE]; 54 extern uint32_t ff_table_4_3_value[TABLE_4_3_SIZE]; 55 #endif 56 57 /* VLCs for decoding layer 3 huffman tables */ 58 extern const VLCElem *ff_huff_vlc[16]; 59 extern VLC ff_huff_quad_vlc[2]; 60 61 /* layer3 scale factor size */ 62 extern const uint8_t ff_slen_table[2][16]; 63 /* number of lsf scale factors for a given size */ 64 extern const uint8_t ff_lsf_nsf_table[6][3][4]; 65 extern const uint8_t ff_mpa_huff_data[32][2]; 66 67 /* band size tables */ 68 extern const uint8_t ff_band_size_long[9][22]; 69 extern const uint8_t ff_band_size_short[9][13]; 70 /* computed from ff_band_size_long */ 71 extern uint16_t ff_band_index_long[9][23]; 72 73 extern int16_t *const ff_division_tabs[4]; 74 75 /* lower 2 bits: modulo 3, higher bits: shift */ 76 extern uint16_t ff_scale_factor_modshift[64]; 77 78 extern const uint8_t ff_mpa_pretab[2][22]; 79 80 /* Initialize tables shared between the fixed and 81 * floating point MPEG audio decoders. */ 82 void ff_mpegaudiodec_common_init_static(void); 83 FF_VISIBILITY_POP_HIDDEN 84 85 #endif /* AVCODEC_MPEGAUDIODATA_H */