Diffstat (limited to 'core/multimedia/opieplayer/libmpeg3/audio/ac3.h') (more/less context) (ignore whitespace changes)
| -rw-r--r-- | core/multimedia/opieplayer/libmpeg3/audio/ac3.h | 308 |
1 files changed, 308 insertions, 0 deletions
diff --git a/core/multimedia/opieplayer/libmpeg3/audio/ac3.h b/core/multimedia/opieplayer/libmpeg3/audio/ac3.h new file mode 100644 index 0000000..9161c36 --- a/dev/null +++ b/core/multimedia/opieplayer/libmpeg3/audio/ac3.h @@ -0,0 +1,308 @@ +/********************************************************************** +** Copyright (C) 2000 Trolltech AS. All rights reserved. +** +** This file is part of Qtopia Environment. +** +** This file may be distributed and/or modified under the terms of the +** GNU General Public License version 2 as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL included in the +** packaging of this file. +** +** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE +** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. +** +** See http://www.trolltech.com/gpl/ for GPL licensing information. +** +** Contact info@trolltech.com if any conditions of this licensing are +** not clear to you. +** +**********************************************************************/ +#ifndef AC3_H +#define AC3_H + +#include "mpeg3real.h" + +#define MAX_AC3_FRAMESIZE 1920 * 2 + 512 + +extern int mpeg3_ac3_samplerates[3]; + +/* Exponent strategy constants */ +#define MPEG3_EXP_REUSE (0) +#define MPEG3_EXP_D15 (1) +#define MPEG3_EXP_D25 (2) +#define MPEG3_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) + + +typedef mpeg3_real_t mpeg3ac3_stream_samples_t[6][256]; + +typedef struct +{ +/* Bit stream identification == 0x8 */ + int bsid; +/* Bit stream mode */ + int bsmod; +/* Audio coding mode */ + int acmod; +/* If we're using the centre channel then */ +/* centre mix level */ + int cmixlev; +/* If we're using the surround channel then */ +/* surround mix level */ + int surmixlev; +/* If we're in 2/0 mode then */ +/* Dolby surround mix level - NOT USED - */ + int dsurmod; +/* Low frequency effects on */ + int lfeon; +/* Dialogue Normalization level */ + int dialnorm; +/* Compression exists */ + int compre; +/* Compression level */ + int compr; +/* Language code exists */ + int langcode; +/* Language code */ + int langcod; +/* Audio production info exists*/ + unsigned int audprodie; + int mixlevel; + int roomtyp; +/* If we're in dual mono mode (acmod == 0) then extra stuff */ + int dialnorm2; + int compr2e; + int compr2; + int langcod2e; + int langcod2; + int audprodi2e; + int mixlevel2; + int roomtyp2; +/* Copyright bit */ + int copyrightb; +/* Original bit */ + int origbs; +/* Timecode 1 exists */ + int timecod1e; +/* Timecode 1 */ + unsigned int timecod1; +/* Timecode 2 exists */ + int timecod2e; +/* Timecode 2 */ + unsigned int timecod2; +/* Additional bit stream info exists */ + int addbsie; +/* Additional bit stream length - 1 (in bytes) */ + int addbsil; +/* Additional bit stream information (max 64 bytes) */ + unsigned char addbsi[64]; + +/* Information not in the AC-3 bitstream, but derived */ +/* Number of channels (excluding LFE) + * Derived from acmod */ + int nfchans; +} mpeg3_ac3bsi_t; + +typedef struct +{ +/* block switch bit indexed by channel num */ + unsigned short blksw[5]; +/* dither enable bit indexed by channel num */ + unsigned short dithflag[5]; +/* dynamic range gain exists */ + int dynrnge; +/* dynamic range gain */ + int dynrng; +/* if acmod==0 then */ +/* dynamic range 2 gain exists */ + int dynrng2e; +/* dynamic range 2 gain */ + int dynrng2; +/* coupling strategy exists */ + int cplstre; +/* coupling in use */ + int cplinu; +/* channel coupled */ + unsigned short chincpl[5]; +/* if acmod==2 then */ +/* Phase flags in use */ + int phsflginu; +/* coupling begin frequency code */ + int cplbegf; +/* coupling end frequency code */ + int cplendf; +/* coupling band structure bits */ + unsigned short cplbndstrc[18]; +/* Do coupling co-ords exist for this channel? */ + unsigned short cplcoe[5]; +/* Master coupling co-ordinate */ + unsigned short mstrcplco[5]; +/* Per coupling band coupling co-ordinates */ + unsigned short cplcoexp[5][18]; + unsigned short cplcomant[5][18]; +/* Phase flags for dual mono */ + unsigned short phsflg[18]; +/* Is there a rematrixing strategy */ + unsigned int rematstr; +/* Rematrixing bits */ + unsigned short rematflg[4]; +/* Coupling exponent strategy */ + int cplexpstr; +/* Exponent strategy for full bandwidth channels */ + unsigned short chexpstr[5]; +/* Exponent strategy for lfe channel */ + int lfeexpstr; +/* Channel bandwidth for independent channels */ + unsigned short chbwcod[5]; +/* The absolute coupling exponent */ + int cplabsexp; +/* Coupling channel exponents (D15 mode gives 18 * 12 /3 encoded exponents */ + unsigned short cplexps[18 * 12 / 3]; +/* fbw channel exponents */ + unsigned short exps[5][252 / 3]; +/* channel gain range */ + unsigned short gainrng[5]; +/* low frequency exponents */ + unsigned short lfeexps[3]; + +/* Bit allocation info */ + int baie; +/* Slow decay code */ + int sdcycod; +/* Fast decay code */ + int fdcycod; +/* Slow gain code */ + int sgaincod; +/* dB per bit code */ + int dbpbcod; +/* masking floor code */ + int floorcod; + +/* SNR offset info */ + int snroffste; +/* coarse SNR offset */ + int csnroffst; +/* coupling fine SNR offset */ + int cplfsnroffst; +/* coupling fast gain code */ + int cplfgaincod; +/* fbw fine SNR offset */ + unsigned short fsnroffst[5]; +/* fbw fast gain code */ + unsigned short fgaincod[5]; +/* lfe fine SNR offset */ + int lfefsnroffst; +/* lfe fast gain code */ + int lfefgaincod; + +/* Coupling leak info */ + int cplleake; +/* coupling fast leak initialization */ + int cplfleak; +/* coupling slow leak initialization */ + int cplsleak; + +/* delta bit allocation info */ + int deltbaie; +/* coupling delta bit allocation exists */ + int cpldeltbae; +/* fbw delta bit allocation exists */ + unsigned short deltbae[5]; +/* number of cpl delta bit segments */ + int cpldeltnseg; +/* coupling delta bit allocation offset */ + short cpldeltoffst[8]; +/* coupling delta bit allocation length */ + short cpldeltlen[8]; +/* coupling delta bit allocation length */ + short cpldeltba[8]; +/* number of delta bit segments */ + unsigned short deltnseg[5]; +/* fbw delta bit allocation offset */ + short deltoffst[5][8]; +/* fbw delta bit allocation length */ + short deltlen[5][8]; +/* fbw delta bit allocation length */ + short deltba[5][8]; + +/* skip length exists */ + int skiple; +/* skip length */ + int skipl; + +/* channel mantissas */ + short chmant[5][256]; + +/* coupling mantissas */ + unsigned short cplmant[256]; + +/* coupling mantissas */ + unsigned short lfemant[7]; + +/* -- Information not in the bitstream, but derived thereof -- */ + +/* Number of coupling sub-bands */ + int ncplsubnd; + +/* Number of combined coupling sub-bands + * Derived from ncplsubnd and cplbndstrc */ + int ncplbnd; + +/* Number of exponent groups by channel + * Derived from strmant, endmant */ + int nchgrps[5]; + +/* Number of coupling exponent groups + * Derived from cplbegf, cplendf, cplexpstr */ + int ncplgrps; + +/* End mantissa numbers of fbw channels */ + unsigned short endmant[5]; + +/* Start and end mantissa numbers for the coupling channel */ + int cplstrtmant; + int cplendmant; + +/* Decoded exponent info */ + unsigned short fbw_exp[5][256]; + unsigned short cpl_exp[256]; + unsigned short lfe_exp[7]; + +/* Bit allocation pointer results */ + short fbw_bap[5][256]; +/*FIXME figure out exactly how many entries there should be (253-37?) */ + short cpl_bap[256]; + short lfe_bap[7]; +} mpeg3_ac3audblk_t; + +/* Bit allocation data */ +typedef struct +{ + int sdecay; + int fdecay; + int sgain; + int dbknee; + int floor; + short psd[256]; + short bndpsd[256]; + short excite[256]; + short mask[256]; +} mpeg3_ac3_bitallocation_t; + +/* Mantissa data */ +typedef struct +{ + unsigned short m_1[3]; + unsigned short m_2[3]; + unsigned short m_4[2]; + unsigned short m_1_pointer; + unsigned short m_2_pointer; + unsigned short m_4_pointer; +} mpeg3_ac3_mantissa_t; + +#endif |