mirror of
https://github.com/mpv-player/mpv
synced 2024-11-11 00:15:33 +01:00
882fe89f99
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@14992 b3059339-0415-0410-9bf9-f77b7e298cf2
132 lines
4.5 KiB
C
132 lines
4.5 KiB
C
/*
|
|
* a52.h
|
|
* Copyright (C) 2000-2001 Michel Lespinasse <walken@zoy.org>
|
|
* Copyright (C) 1999-2000 Aaron Holtzman <aholtzma@ess.engr.uvic.ca>
|
|
*
|
|
* This file is part of a52dec, a free ATSC A-52 stream decoder.
|
|
* See http://liba52.sourceforge.net/ for updates.
|
|
*
|
|
* Modified for use with MPlayer, changes contained in liba52_changes.diff.
|
|
* detailed CVS changelog at http://www.mplayerhq.hu/cgi-bin/cvsweb.cgi/main/
|
|
* $Id$
|
|
*
|
|
* a52dec is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* a52dec 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 General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*/
|
|
|
|
#ifndef A52_H
|
|
#define A52_H
|
|
|
|
#ifndef LIBA52_DOUBLE
|
|
typedef float sample_t;
|
|
#else
|
|
typedef double sample_t;
|
|
#endif
|
|
|
|
typedef struct a52_ba_s {
|
|
uint16_t fsnroffst; /* fine SNR offset */
|
|
uint16_t fgaincod; /* fast gain */
|
|
uint16_t deltbae; /* delta bit allocation exists */
|
|
int8_t deltba[50]; /* per-band delta bit allocation */
|
|
} a52_ba_t;
|
|
|
|
typedef struct a52_state_s {
|
|
uint8_t fscod; /* sample rate */
|
|
uint8_t halfrate; /* halfrate factor */
|
|
uint8_t acmod; /* coded channels */
|
|
sample_t clev; /* centre channel mix level */
|
|
sample_t slev; /* surround channels mix level */
|
|
uint8_t lfeon; /* coded lfe channel */
|
|
|
|
int output; /* type of output */
|
|
sample_t level; /* output level */
|
|
sample_t bias; /* output bias */
|
|
|
|
int dynrnge; /* apply dynamic range */
|
|
sample_t dynrng; /* dynamic range */
|
|
void * dynrngdata; /* dynamic range callback funtion and data */
|
|
sample_t (* dynrngcall) (sample_t range, void * dynrngdata);
|
|
|
|
uint16_t cplinu; /* coupling in use */
|
|
uint16_t chincpl[5]; /* channel coupled */
|
|
uint16_t phsflginu; /* phase flags in use (stereo only) */
|
|
uint16_t cplbndstrc[18]; /* coupling band structure */
|
|
uint16_t cplstrtmant; /* coupling channel start mantissa */
|
|
uint16_t cplendmant; /* coupling channel end mantissa */
|
|
sample_t cplco[5][18]; /* coupling coordinates */
|
|
|
|
/* derived information */
|
|
uint16_t cplstrtbnd; /* coupling start band (for bit allocation) */
|
|
uint16_t ncplbnd; /* number of coupling bands */
|
|
|
|
uint16_t rematflg[4]; /* stereo rematrixing */
|
|
|
|
uint16_t endmant[5]; /* channel end mantissa */
|
|
|
|
uint8_t cpl_exp[256]; /* decoded coupling channel exponents */
|
|
uint8_t fbw_exp[5][256]; /* decoded channel exponents */
|
|
uint8_t lfe_exp[7]; /* decoded lfe channel exponents */
|
|
|
|
uint16_t sdcycod; /* slow decay */
|
|
uint16_t fdcycod; /* fast decay */
|
|
uint16_t sgaincod; /* slow gain */
|
|
uint16_t dbpbcod; /* dB per bit - encodes the dbknee value */
|
|
uint16_t floorcod; /* masking floor */
|
|
|
|
uint16_t csnroffst; /* coarse SNR offset */
|
|
a52_ba_t cplba; /* coupling bit allocation parameters */
|
|
a52_ba_t ba[5]; /* channel bit allocation parameters */
|
|
a52_ba_t lfeba; /* lfe bit allocation parameters */
|
|
|
|
uint16_t cplfleak; /* coupling fast leak init */
|
|
uint16_t cplsleak; /* coupling slow leak init */
|
|
|
|
/* derived bit allocation information */
|
|
int8_t fbw_bap[5][256];
|
|
int8_t cpl_bap[256];
|
|
int8_t lfe_bap[7];
|
|
} a52_state_t;
|
|
|
|
#define A52_CHANNEL 0
|
|
#define A52_MONO 1
|
|
#define A52_STEREO 2
|
|
#define A52_3F 3
|
|
#define A52_2F1R 4
|
|
#define A52_3F1R 5
|
|
#define A52_2F2R 6
|
|
#define A52_3F2R 7
|
|
#define A52_CHANNEL1 8
|
|
#define A52_CHANNEL2 9
|
|
#define A52_DOLBY 10
|
|
#define A52_CHANNEL_MASK 15
|
|
|
|
#define A52_LFE 16
|
|
#define A52_ADJUST_LEVEL 32
|
|
|
|
sample_t * a52_init (uint32_t mm_accel);
|
|
int a52_syncinfo (uint8_t * buf, int * flags,
|
|
int * sample_rate, int * bit_rate);
|
|
int a52_frame (a52_state_t * state, uint8_t * buf, int * flags,
|
|
sample_t * level, sample_t bias);
|
|
void a52_dynrng (a52_state_t * state,
|
|
sample_t (* call) (sample_t, void *), void * data);
|
|
int a52_block (a52_state_t * state, sample_t * samples);
|
|
|
|
void* a52_resample_init(uint32_t mm_accel,int flags,int chans);
|
|
extern int (* a52_resample) (float * _f, int16_t * s16);
|
|
|
|
uint16_t crc16_block(uint8_t *data,uint32_t num_bytes);
|
|
|
|
#endif /* A52_H */
|