mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-11-26 19:01:44 +02:00
54 lines
1.7 KiB
C
54 lines
1.7 KiB
C
|
/*
|
||
|
|
* Copyright (c) 2007 Michael Niedermayer
|
||
|
|
*
|
||
|
|
* This file is part of FFmpeg.
|
||
|
|
*
|
||
|
|
* FFmpeg 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.
|
||
|
|
*
|
||
|
|
* FFmpeg 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 FFmpeg; 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);
|