diff options
Diffstat (limited to 'src/liba52/a52.h')
| -rw-r--r-- | src/liba52/a52.h | 79 |
1 files changed, 13 insertions, 66 deletions
diff --git a/src/liba52/a52.h b/src/liba52/a52.h index 6b3cecddd..9db52ccf8 100644 --- a/src/liba52/a52.h +++ b/src/liba52/a52.h @@ -1,8 +1,10 @@ /* * a52.h - * Copyright (C) 1999-2001 Aaron Holtzman <aholtzma@ess.engr.uvic.ca> + * Copyright (C) 2000-2002 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. * * a52dec is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by @@ -19,75 +21,16 @@ * 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; +typedef struct a52_state_s a52_state_t; #define A52_CHANNEL 0 #define A52_MONO 1 @@ -105,11 +48,15 @@ typedef struct a52_state_s { #define A52_LFE 16 #define A52_ADJUST_LEVEL 32 -sample_t * a52_init (uint32_t mm_accel, sample_t **samples_base); +a52_state_t * a52_init (uint32_t mm_accel); +sample_t * a52_samples (a52_state_t * state); 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); +int a52_block (a52_state_t * state); +void a52_free (a52_state_t * state); + +#endif /* A52_H */ |