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Diffstat (limited to 'ac3dec/ac3_internal.h')
| -rw-r--r-- | ac3dec/ac3_internal.h | 353 |
1 files changed, 0 insertions, 353 deletions
diff --git a/ac3dec/ac3_internal.h b/ac3dec/ac3_internal.h deleted file mode 100644 index 259396f..0000000 --- a/ac3dec/ac3_internal.h +++ /dev/null @@ -1,353 +0,0 @@ -/* - * ac3_internal.h - * - * Copyright (C) Aaron Holtzman - May 1999 - * - * This file is part of ac3dec, a free Dolby AC-3 stream decoder. - * - * ac3dec 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, or (at your option) - * any later version. - * - * ac3dec 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 GNU Make; see the file COPYING. If not, write to - * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. - * - */ - -#ifndef __GNUC__ -#define inline -#endif - -#include <setjmp.h> - -/* Exponent strategy constants */ -#define EXP_REUSE (0) -#define EXP_D15 (1) -#define EXP_D25 (2) -#define EXP_D45 (3) - -/* Delta bit allocation constants */ -#define DELTA_BIT_REUSE (0) -#define DELTA_BIT_NEW (1) -#define DELTA_BIT_NONE (2) -#define DELTA_BIT_RESERVED (3) - -/* samples work structure */ -typedef float stream_samples_t[6][256]; - -/* global config structure */ -extern ac3_config_t ac3_config; -/* global error flag */ -extern jmp_buf error_jmp_mark; -#define HANDLE_ERROR() longjmp (error_jmp_mark, -1) - -/* Everything you wanted to know about band structure */ -/* - * The entire frequency domain is represented by 256 real - * floating point fourier coefficients. Only the lower 253 - * coefficients are actually utilized however. We use arrays - * of 256 to be efficient in some cases. - * - * The 5 full bandwidth channels (fbw) can have their higher - * frequencies coupled together. These coupled channels then - * share their high frequency components. - * - * This coupling band is broken up into 18 sub-bands starting - * at mantissa number 37. Each sub-band is 12 bins wide. - * - * There are 50 bit allocation sub-bands which cover the entire - * frequency range. The sub-bands are of non-uniform width, and - * approximate a 1/6 octave scale. - */ - -/* The following structures are filled in by their corresponding parse_* - * functions. See http://www.atsc.org/Standards/A52/a_52.pdf for - * full details on each field. Indented fields are used to denote - * conditional fields. - */ - -typedef struct syncinfo_s -{ - uint32_t magic; - /* Sync word == 0x0B77 */ - uint16_t syncword; - /* crc for the first 5/8 of the sync block */ - /* uint16_t crc1; */ - /* Stream Sampling Rate (kHz) 0 = 48, 1 = 44.1, 2 = 32, 3 = reserved */ - uint16_t fscod; - /* Frame size code */ - uint16_t frmsizecod; - - /* Information not in the AC-3 bitstream, but derived */ - /* Frame size in 16 bit words */ - uint16_t frame_size; - /* Bit rate in kilobits */ - uint16_t bit_rate; - /* sampling rate in hertz */ - uint32_t sampling_rate; - -} syncinfo_t; - -typedef struct bsi_s -{ - uint32_t magic; - /* Bit stream identification == 0x8 */ - uint16_t bsid; - /* Bit stream mode */ - uint16_t bsmod; - /* Audio coding mode */ - uint16_t acmod; - /* If we're using the centre channel then */ - /* centre mix level */ - uint16_t cmixlev; - /* If we're using the surround channel then */ - /* surround mix level */ - uint16_t surmixlev; - /* If we're in 2/0 mode then */ - /* Dolby surround mix level - NOT USED - */ - uint16_t dsurmod; - /* Low frequency effects on */ - uint16_t lfeon; - /* Dialogue Normalization level */ - uint16_t dialnorm; - /* Compression exists */ - uint16_t compre; - /* Compression level */ - uint16_t compr; - /* Language code exists */ - uint16_t langcode; - /* Language code */ - uint16_t langcod; - /* Audio production info exists*/ - uint16_t audprodie; - uint16_t mixlevel; - uint16_t roomtyp; - /* If we're in dual mono mode (acmod == 0) then extra stuff */ - uint16_t dialnorm2; - uint16_t compr2e; - uint16_t compr2; - uint16_t langcod2e; - uint16_t langcod2; - uint16_t audprodi2e; - uint16_t mixlevel2; - uint16_t roomtyp2; - /* Copyright bit */ - uint16_t copyrightb; - /* Original bit */ - uint16_t origbs; - /* Timecode 1 exists */ - uint16_t timecod1e; - /* Timecode 1 */ - uint16_t timecod1; - /* Timecode 2 exists */ - uint16_t timecod2e; - /* Timecode 2 */ - uint16_t timecod2; - /* Additional bit stream info exists */ - uint16_t addbsie; - /* Additional bit stream length - 1 (in bytes) */ - uint16_t addbsil; - /* Additional bit stream information (max 64 bytes) */ - uint8_t addbsi[64]; - - /* Information not in the AC-3 bitstream, but derived */ - /* Number of channels (excluding LFE) - * Derived from acmod */ - uint16_t nfchans; -} bsi_t; - - -/* more pain */ -typedef struct audblk_s -{ - uint32_t magic1; - /* block switch bit indexed by channel num */ - uint16_t blksw[5]; - /* dither enable bit indexed by channel num */ - uint16_t dithflag[5]; - /* dynamic range gain exists */ - uint16_t dynrnge; - /* dynamic range gain */ - uint16_t dynrng; - /* if acmod==0 then */ - /* dynamic range 2 gain exists */ - uint16_t dynrng2e; - /* dynamic range 2 gain */ - uint16_t dynrng2; - /* coupling strategy exists */ - uint16_t cplstre; - /* coupling in use */ - uint16_t cplinu; - /* channel coupled */ - uint16_t chincpl[5]; - /* if acmod==2 then */ - /* Phase flags in use */ - uint16_t phsflginu; - /* coupling begin frequency code */ - uint16_t cplbegf; - /* coupling end frequency code */ - uint16_t cplendf; - /* coupling band structure bits */ - uint16_t cplbndstrc[18]; - /* Do coupling co-ords exist for this channel? */ - uint16_t cplcoe[5]; - /* Master coupling co-ordinate */ - uint16_t mstrcplco[5]; - /* Per coupling band coupling co-ordinates */ - uint16_t cplcoexp[5][18]; - uint16_t cplcomant[5][18]; - /* Phase flags for dual mono */ - uint16_t phsflg[18]; - /* Is there a rematrixing strategy */ - uint16_t rematstr; - /* Rematrixing bits */ - uint16_t rematflg[4]; - /* Coupling exponent strategy */ - uint16_t cplexpstr; - /* Exponent strategy for full bandwidth channels */ - uint16_t chexpstr[5]; - /* Exponent strategy for lfe channel */ - uint16_t lfeexpstr; - /* Channel bandwidth for independent channels */ - uint16_t chbwcod[5]; - /* The absolute coupling exponent */ - uint16_t cplabsexp; - /* Coupling channel exponents (D15 mode gives 18 * 12 /3 encoded exponents */ - uint16_t cplexps[18 * 12 / 3]; - /* Sanity checking constant */ - uint32_t magic2; - /* fbw channel exponents */ - uint16_t exps[5][252 / 3]; - /* channel gain range */ - uint16_t gainrng[5]; - /* low frequency exponents */ - uint16_t lfeexps[3]; - - /* Bit allocation info */ - uint16_t baie; - /* Slow decay code */ - uint16_t sdcycod; - /* Fast decay code */ - uint16_t fdcycod; - /* Slow gain code */ - uint16_t sgaincod; - /* dB per bit code */ - uint16_t dbpbcod; - /* masking floor code */ - uint16_t floorcod; - - /* SNR offset info */ - uint16_t snroffste; - /* coarse SNR offset */ - uint16_t csnroffst; - /* coupling fine SNR offset */ - uint16_t cplfsnroffst; - /* coupling fast gain code */ - uint16_t cplfgaincod; - /* fbw fine SNR offset */ - uint16_t fsnroffst[5]; - /* fbw fast gain code */ - uint16_t fgaincod[5]; - /* lfe fine SNR offset */ - uint16_t lfefsnroffst; - /* lfe fast gain code */ - uint16_t lfefgaincod; - - /* Coupling leak info */ - uint16_t cplleake; - /* coupling fast leak initialization */ - uint16_t cplfleak; - /* coupling slow leak initialization */ - uint16_t cplsleak; - - /* delta bit allocation info */ - uint16_t deltbaie; - /* coupling delta bit allocation exists */ - uint16_t cpldeltbae; - /* fbw delta bit allocation exists */ - uint16_t deltbae[5]; - /* number of cpl delta bit segments */ - uint16_t cpldeltnseg; - /* coupling delta bit allocation offset */ - uint16_t cpldeltoffst[8]; - /* coupling delta bit allocation length */ - uint16_t cpldeltlen[8]; - /* coupling delta bit allocation length */ - uint16_t cpldeltba[8]; - /* number of delta bit segments */ - uint16_t deltnseg[5]; - /* fbw delta bit allocation offset */ - uint16_t deltoffst[5][8]; - /* fbw delta bit allocation length */ - uint16_t deltlen[5][8]; - /* fbw delta bit allocation length */ - uint16_t deltba[5][8]; - - /* skip length exists */ - uint16_t skiple; - /* skip length */ - uint16_t skipl; - - //Removed Feb 2000 -ah - //added Jul 2000 ++dent - /* channel mantissas */ - uint16_t chmant[5][256]; - - /* coupling mantissas */ -// uint16_t cplmant[256]; - - //Added Jun 2000 -MaXX - /* coupling floats */ - float cpl_flt[ 256 ]; - - //Removed Feb 2000 -ah - //added Jul 2000 ++dent - /* coupling mantissas */ - uint16_t lfemant[7]; - - - /* -- Information not in the bitstream, but derived thereof -- */ - - /* Number of coupling sub-bands */ - uint16_t ncplsubnd; - - /* Number of combined coupling sub-bands - * Derived from ncplsubnd and cplbndstrc */ - uint16_t ncplbnd; - - /* Number of exponent groups by channel - * Derived from strmant, endmant */ - uint16_t nchgrps[5]; - - /* Number of coupling exponent groups - * Derived from cplbegf, cplendf, cplexpstr */ - uint16_t ncplgrps; - - /* End mantissa numbers of fbw channels */ - uint16_t endmant[5]; - - /* Start and end mantissa numbers for the coupling channel */ - uint16_t cplstrtmant; - uint16_t cplendmant; - - /* Decoded exponent info */ - uint16_t fbw_exp[5][256]; - uint16_t cpl_exp[256]; - uint16_t lfe_exp[7]; - - /* Bit allocation pointer results */ - uint16_t fbw_bap[5][256]; - uint16_t cpl_bap[256]; - uint16_t lfe_bap[7]; - - uint32_t magic3; -} audblk_t; - - |