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53 lines
1.7 KiB
53 lines
1.7 KiB
/* |
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* Copyright (c) 2007 Michael Niedermayer |
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* |
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* This file is part of Libav. |
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* |
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* Libav 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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* Libav 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 Libav; 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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/* layer 3 "granule" */ |
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typedef struct GranuleDef { |
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uint8_t scfsi; |
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int part2_3_length; |
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int big_values; |
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int global_gain; |
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int scalefac_compress; |
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uint8_t block_type; |
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uint8_t switch_point; |
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int table_select[3]; |
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int subblock_gain[3]; |
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uint8_t scalefac_scale; |
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uint8_t count1table_select; |
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int region_size[3]; /* number of huffman codes in each region */ |
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int preflag; |
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int short_start, long_end; /* long/short band indexes */ |
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uint8_t scale_factors[40]; |
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int32_t sb_hybrid[SBLIMIT * 18]; /* 576 samples */ |
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} GranuleDef; |
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void ff_mp3_init(void); |
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/** |
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* Compute huffman coded region sizes. |
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*/ |
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void ff_init_short_region(MPADecodeContext *s, GranuleDef *g); |
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/** |
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* Compute huffman coded region sizes. |
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*/ |
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void ff_init_long_region(MPADecodeContext *s, GranuleDef *g, int ra1, int ra2); |
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void ff_compute_band_indexes(MPADecodeContext *s, GranuleDef *g);
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