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85 lines
2.6 KiB
85 lines
2.6 KiB
/* |
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* MPEG Audio common tables |
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* copyright (c) 2002 Fabrice Bellard |
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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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/** |
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* @file |
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* mpeg audio layer common tables. |
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*/ |
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#ifndef AVCODEC_MPEGAUDIODATA_H |
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#define AVCODEC_MPEGAUDIODATA_H |
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#include <stdint.h> |
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#include "config.h" |
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#include "libavutil/attributes_internal.h" |
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#include "vlc.h" |
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#define MODE_EXT_MS_STEREO 2 |
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#define MODE_EXT_I_STEREO 1 |
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FF_VISIBILITY_PUSH_HIDDEN |
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extern const uint16_t ff_mpa_bitrate_tab[2][3][15]; |
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extern const uint16_t ff_mpa_freq_tab[3]; |
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extern const int ff_mpa_sblimit_table[5]; |
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extern const int ff_mpa_quant_steps[17]; |
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extern const int ff_mpa_quant_bits[17]; |
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extern const unsigned char * const ff_mpa_alloc_tables[5]; |
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#define TABLE_4_3_SIZE ((8191 + 16)*4) |
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#if CONFIG_HARDCODED_TABLES |
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extern const int8_t ff_table_4_3_exp [TABLE_4_3_SIZE]; |
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extern const uint32_t ff_table_4_3_value[TABLE_4_3_SIZE]; |
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#else |
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extern int8_t ff_table_4_3_exp [TABLE_4_3_SIZE]; |
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extern uint32_t ff_table_4_3_value[TABLE_4_3_SIZE]; |
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#endif |
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/* VLCs for decoding layer 3 huffman tables */ |
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extern const VLCElem *ff_huff_vlc[16]; |
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extern VLC ff_huff_quad_vlc[2]; |
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/* layer3 scale factor size */ |
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extern const uint8_t ff_slen_table[2][16]; |
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/* number of lsf scale factors for a given size */ |
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extern const uint8_t ff_lsf_nsf_table[6][3][4]; |
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extern const uint8_t ff_mpa_huff_data[32][2]; |
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/* band size tables */ |
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extern const uint8_t ff_band_size_long[9][22]; |
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extern const uint8_t ff_band_size_short[9][13]; |
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/* computed from ff_band_size_long */ |
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extern uint16_t ff_band_index_long[9][23]; |
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extern int16_t *const ff_division_tabs[4]; |
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/* lower 2 bits: modulo 3, higher bits: shift */ |
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extern uint16_t ff_scale_factor_modshift[64]; |
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extern const uint8_t ff_mpa_pretab[2][22]; |
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/* Initialize tables shared between the fixed and |
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* floating point MPEG audio decoders. */ |
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void ff_mpegaudiodec_common_init_static(void); |
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FF_VISIBILITY_POP_HIDDEN |
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#endif /* AVCODEC_MPEGAUDIODATA_H */
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