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- /*
- * Copyright (c) 2007 Michael Niedermayer
- *
- * This file is part of Libav.
- *
- * Libav is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * Libav is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with Libav; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
- /* layer 3 "granule" */
- typedef struct GranuleDef {
- uint8_t scfsi;
- int part2_3_length;
- int big_values;
- int global_gain;
- int scalefac_compress;
- uint8_t block_type;
- uint8_t switch_point;
- int table_select[3];
- int subblock_gain[3];
- uint8_t scalefac_scale;
- uint8_t count1table_select;
- int region_size[3]; /* number of huffman codes in each region */
- int preflag;
- int short_start, long_end; /* long/short band indexes */
- uint8_t scale_factors[40];
- int32_t sb_hybrid[SBLIMIT * 18]; /* 576 samples */
- } GranuleDef;
-
- void ff_mp3_init(void);
-
- /**
- * Compute huffman coded region sizes.
- */
- void ff_init_short_region(MPADecodeContext *s, GranuleDef *g);
-
- /**
- * Compute huffman coded region sizes.
- */
- void ff_init_long_region(MPADecodeContext *s, GranuleDef *g, int ra1, int ra2);
-
- void ff_compute_band_indexes(MPADecodeContext *s, GranuleDef *g);
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