diff options
Diffstat (limited to 'ac3dec/ac3_internal.h')
| -rw-r--r-- | ac3dec/ac3_internal.h | 251 |
1 files changed, 130 insertions, 121 deletions
diff --git a/ac3dec/ac3_internal.h b/ac3dec/ac3_internal.h index 235189e..259396f 100644 --- a/ac3dec/ac3_internal.h +++ b/ac3dec/ac3_internal.h @@ -25,6 +25,8 @@ #define inline #endif +#include <setjmp.h> + /* Exponent strategy constants */ #define EXP_REUSE (0) #define EXP_D15 (1) @@ -43,7 +45,8 @@ typedef float stream_samples_t[6][256]; /* global config structure */ extern ac3_config_t ac3_config; /* global error flag */ -extern uint_32 error_flag; +extern jmp_buf error_jmp_mark; +#define HANDLE_ERROR() longjmp (error_jmp_mark, -1) /* Everything you wanted to know about band structure */ /* @@ -72,273 +75,279 @@ extern uint_32 error_flag; typedef struct syncinfo_s { - uint_32 magic; + uint32_t magic; /* Sync word == 0x0B77 */ - uint_16 syncword; + uint16_t syncword; /* crc for the first 5/8 of the sync block */ - /* uint_16 crc1; */ + /* uint16_t crc1; */ /* Stream Sampling Rate (kHz) 0 = 48, 1 = 44.1, 2 = 32, 3 = reserved */ - uint_16 fscod; + uint16_t fscod; /* Frame size code */ - uint_16 frmsizecod; + uint16_t frmsizecod; /* Information not in the AC-3 bitstream, but derived */ /* Frame size in 16 bit words */ - uint_16 frame_size; + uint16_t frame_size; /* Bit rate in kilobits */ - uint_16 bit_rate; + uint16_t bit_rate; /* sampling rate in hertz */ - uint_32 sampling_rate; + uint32_t sampling_rate; } syncinfo_t; typedef struct bsi_s { - uint_32 magic; + uint32_t magic; /* Bit stream identification == 0x8 */ - uint_16 bsid; + uint16_t bsid; /* Bit stream mode */ - uint_16 bsmod; + uint16_t bsmod; /* Audio coding mode */ - uint_16 acmod; + uint16_t acmod; /* If we're using the centre channel then */ /* centre mix level */ - uint_16 cmixlev; + uint16_t cmixlev; /* If we're using the surround channel then */ /* surround mix level */ - uint_16 surmixlev; + uint16_t surmixlev; /* If we're in 2/0 mode then */ /* Dolby surround mix level - NOT USED - */ - uint_16 dsurmod; + uint16_t dsurmod; /* Low frequency effects on */ - uint_16 lfeon; + uint16_t lfeon; /* Dialogue Normalization level */ - uint_16 dialnorm; + uint16_t dialnorm; /* Compression exists */ - uint_16 compre; + uint16_t compre; /* Compression level */ - uint_16 compr; + uint16_t compr; /* Language code exists */ - uint_16 langcode; + uint16_t langcode; /* Language code */ - uint_16 langcod; + uint16_t langcod; /* Audio production info exists*/ - uint_16 audprodie; - uint_16 mixlevel; - uint_16 roomtyp; + uint16_t audprodie; + uint16_t mixlevel; + uint16_t roomtyp; /* If we're in dual mono mode (acmod == 0) then extra stuff */ - uint_16 dialnorm2; - uint_16 compr2e; - uint_16 compr2; - uint_16 langcod2e; - uint_16 langcod2; - uint_16 audprodi2e; - uint_16 mixlevel2; - uint_16 roomtyp2; + 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 */ - uint_16 copyrightb; + uint16_t copyrightb; /* Original bit */ - uint_16 origbs; + uint16_t origbs; /* Timecode 1 exists */ - uint_16 timecod1e; + uint16_t timecod1e; /* Timecode 1 */ - uint_16 timecod1; + uint16_t timecod1; /* Timecode 2 exists */ - uint_16 timecod2e; + uint16_t timecod2e; /* Timecode 2 */ - uint_16 timecod2; + uint16_t timecod2; /* Additional bit stream info exists */ - uint_16 addbsie; + uint16_t addbsie; /* Additional bit stream length - 1 (in bytes) */ - uint_16 addbsil; + uint16_t addbsil; /* Additional bit stream information (max 64 bytes) */ - uint_8 addbsi[64]; + uint8_t addbsi[64]; /* Information not in the AC-3 bitstream, but derived */ /* Number of channels (excluding LFE) * Derived from acmod */ - uint_16 nfchans; + uint16_t nfchans; } bsi_t; /* more pain */ typedef struct audblk_s { - uint_32 magic1; + uint32_t magic1; /* block switch bit indexed by channel num */ - uint_16 blksw[5]; + uint16_t blksw[5]; /* dither enable bit indexed by channel num */ - uint_16 dithflag[5]; + uint16_t dithflag[5]; /* dynamic range gain exists */ - uint_16 dynrnge; + uint16_t dynrnge; /* dynamic range gain */ - uint_16 dynrng; + uint16_t dynrng; /* if acmod==0 then */ /* dynamic range 2 gain exists */ - uint_16 dynrng2e; + uint16_t dynrng2e; /* dynamic range 2 gain */ - uint_16 dynrng2; + uint16_t dynrng2; /* coupling strategy exists */ - uint_16 cplstre; + uint16_t cplstre; /* coupling in use */ - uint_16 cplinu; + uint16_t cplinu; /* channel coupled */ - uint_16 chincpl[5]; + uint16_t chincpl[5]; /* if acmod==2 then */ /* Phase flags in use */ - uint_16 phsflginu; + uint16_t phsflginu; /* coupling begin frequency code */ - uint_16 cplbegf; + uint16_t cplbegf; /* coupling end frequency code */ - uint_16 cplendf; + uint16_t cplendf; /* coupling band structure bits */ - uint_16 cplbndstrc[18]; + uint16_t cplbndstrc[18]; /* Do coupling co-ords exist for this channel? */ - uint_16 cplcoe[5]; + uint16_t cplcoe[5]; /* Master coupling co-ordinate */ - uint_16 mstrcplco[5]; + uint16_t mstrcplco[5]; /* Per coupling band coupling co-ordinates */ - uint_16 cplcoexp[5][18]; - uint_16 cplcomant[5][18]; + uint16_t cplcoexp[5][18]; + uint16_t cplcomant[5][18]; /* Phase flags for dual mono */ - uint_16 phsflg[18]; + uint16_t phsflg[18]; /* Is there a rematrixing strategy */ - uint_16 rematstr; + uint16_t rematstr; /* Rematrixing bits */ - uint_16 rematflg[4]; + uint16_t rematflg[4]; /* Coupling exponent strategy */ - uint_16 cplexpstr; + uint16_t cplexpstr; /* Exponent strategy for full bandwidth channels */ - uint_16 chexpstr[5]; + uint16_t chexpstr[5]; /* Exponent strategy for lfe channel */ - uint_16 lfeexpstr; + uint16_t lfeexpstr; /* Channel bandwidth for independent channels */ - uint_16 chbwcod[5]; + uint16_t chbwcod[5]; /* The absolute coupling exponent */ - uint_16 cplabsexp; + uint16_t cplabsexp; /* Coupling channel exponents (D15 mode gives 18 * 12 /3 encoded exponents */ - uint_16 cplexps[18 * 12 / 3]; + uint16_t cplexps[18 * 12 / 3]; /* Sanity checking constant */ - uint_32 magic2; + uint32_t magic2; /* fbw channel exponents */ - uint_16 exps[5][252 / 3]; + uint16_t exps[5][252 / 3]; /* channel gain range */ - uint_16 gainrng[5]; + uint16_t gainrng[5]; /* low frequency exponents */ - uint_16 lfeexps[3]; + uint16_t lfeexps[3]; /* Bit allocation info */ - uint_16 baie; + uint16_t baie; /* Slow decay code */ - uint_16 sdcycod; + uint16_t sdcycod; /* Fast decay code */ - uint_16 fdcycod; + uint16_t fdcycod; /* Slow gain code */ - uint_16 sgaincod; + uint16_t sgaincod; /* dB per bit code */ - uint_16 dbpbcod; + uint16_t dbpbcod; /* masking floor code */ - uint_16 floorcod; + uint16_t floorcod; /* SNR offset info */ - uint_16 snroffste; + uint16_t snroffste; /* coarse SNR offset */ - uint_16 csnroffst; + uint16_t csnroffst; /* coupling fine SNR offset */ - uint_16 cplfsnroffst; + uint16_t cplfsnroffst; /* coupling fast gain code */ - uint_16 cplfgaincod; + uint16_t cplfgaincod; /* fbw fine SNR offset */ - uint_16 fsnroffst[5]; + uint16_t fsnroffst[5]; /* fbw fast gain code */ - uint_16 fgaincod[5]; + uint16_t fgaincod[5]; /* lfe fine SNR offset */ - uint_16 lfefsnroffst; + uint16_t lfefsnroffst; /* lfe fast gain code */ - uint_16 lfefgaincod; + uint16_t lfefgaincod; /* Coupling leak info */ - uint_16 cplleake; + uint16_t cplleake; /* coupling fast leak initialization */ - uint_16 cplfleak; + uint16_t cplfleak; /* coupling slow leak initialization */ - uint_16 cplsleak; + uint16_t cplsleak; /* delta bit allocation info */ - uint_16 deltbaie; + uint16_t deltbaie; /* coupling delta bit allocation exists */ - uint_16 cpldeltbae; + uint16_t cpldeltbae; /* fbw delta bit allocation exists */ - uint_16 deltbae[5]; + uint16_t deltbae[5]; /* number of cpl delta bit segments */ - uint_16 cpldeltnseg; + uint16_t cpldeltnseg; /* coupling delta bit allocation offset */ - uint_16 cpldeltoffst[8]; + uint16_t cpldeltoffst[8]; /* coupling delta bit allocation length */ - uint_16 cpldeltlen[8]; + uint16_t cpldeltlen[8]; /* coupling delta bit allocation length */ - uint_16 cpldeltba[8]; + uint16_t cpldeltba[8]; /* number of delta bit segments */ - uint_16 deltnseg[5]; + uint16_t deltnseg[5]; /* fbw delta bit allocation offset */ - uint_16 deltoffst[5][8]; + uint16_t deltoffst[5][8]; /* fbw delta bit allocation length */ - uint_16 deltlen[5][8]; + uint16_t deltlen[5][8]; /* fbw delta bit allocation length */ - uint_16 deltba[5][8]; + uint16_t deltba[5][8]; /* skip length exists */ - uint_16 skiple; + uint16_t skiple; /* skip length */ - uint_16 skipl; + uint16_t skipl; //Removed Feb 2000 -ah + //added Jul 2000 ++dent /* channel mantissas */ - //uint_16 chmant[5][256]; + uint16_t chmant[5][256]; /* coupling mantissas */ - uint_16 cplmant[256]; +// uint16_t cplmant[256]; + + //Added Jun 2000 -MaXX + /* coupling floats */ + float cpl_flt[ 256 ]; //Removed Feb 2000 -ah + //added Jul 2000 ++dent /* coupling mantissas */ - //uint_16 lfemant[7]; + uint16_t lfemant[7]; /* -- Information not in the bitstream, but derived thereof -- */ /* Number of coupling sub-bands */ - uint_16 ncplsubnd; + uint16_t ncplsubnd; /* Number of combined coupling sub-bands * Derived from ncplsubnd and cplbndstrc */ - uint_16 ncplbnd; + uint16_t ncplbnd; /* Number of exponent groups by channel * Derived from strmant, endmant */ - uint_16 nchgrps[5]; + uint16_t nchgrps[5]; /* Number of coupling exponent groups * Derived from cplbegf, cplendf, cplexpstr */ - uint_16 ncplgrps; + uint16_t ncplgrps; /* End mantissa numbers of fbw channels */ - uint_16 endmant[5]; + uint16_t endmant[5]; /* Start and end mantissa numbers for the coupling channel */ - uint_16 cplstrtmant; - uint_16 cplendmant; + uint16_t cplstrtmant; + uint16_t cplendmant; /* Decoded exponent info */ - uint_16 fbw_exp[5][256]; - uint_16 cpl_exp[256]; - uint_16 lfe_exp[7]; + uint16_t fbw_exp[5][256]; + uint16_t cpl_exp[256]; + uint16_t lfe_exp[7]; /* Bit allocation pointer results */ - uint_16 fbw_bap[5][256]; - uint_16 cpl_bap[256]; - uint_16 lfe_bap[7]; + uint16_t fbw_bap[5][256]; + uint16_t cpl_bap[256]; + uint16_t lfe_bap[7]; - uint_32 magic3; + uint32_t magic3; } audblk_t; |