diff options
Diffstat (limited to 'setedit/mp3/mpegsound/mpglayr2.cc')
| -rw-r--r-- | setedit/mp3/mpegsound/mpglayr2.cc | 754 |
1 files changed, 754 insertions, 0 deletions
diff --git a/setedit/mp3/mpegsound/mpglayr2.cc b/setedit/mp3/mpegsound/mpglayr2.cc new file mode 100644 index 0000000..a4f5316 --- /dev/null +++ b/setedit/mp3/mpegsound/mpglayr2.cc @@ -0,0 +1,754 @@ +/* MPEG/WAVE Sound library + + (C) 1997 by Jung woo-jae */ + +// Mpeglayer2.cc +// It's for MPEG Layer 2 + +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + +#include "mpegsound.h" + +#define MAXTABLE 2 + +// Tables for layer 2 +static const int bitalloclengthtable[MAXTABLE][MAXSUBBAND]= +{{4,4,3,3,3,3,3,3,3,3,3,3,3,3,3,3, 3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3}, + {4,4,4,4,4,4,4,4,4,4,4,3,3,3,3,3, 3,3,3,3,3,3,3,2,2,2,2,2,2,2,2,2}}; + +static const REAL group5bits[27*3]= +{ + -2.0/3.0, -2.0/3.0, -2.0/3.0, + 0.0, -2.0/3.0, -2.0/3.0, + 2.0/3.0, -2.0/3.0, -2.0/3.0, + -2.0/3.0, 0.0, -2.0/3.0, + 0.0, 0.0, -2.0/3.0, + 2.0/3.0, 0.0, -2.0/3.0, + -2.0/3.0, 2.0/3.0, -2.0/3.0, + 0.0, 2.0/3.0, -2.0/3.0, + 2.0/3.0, 2.0/3.0, -2.0/3.0, + -2.0/3.0, -2.0/3.0, 0.0, + 0.0, -2.0/3.0, 0.0, + 2.0/3.0, -2.0/3.0, 0.0, + -2.0/3.0, 0.0, 0.0, + 0.0, 0.0, 0.0, + 2.0/3.0, 0.0, 0.0, + -2.0/3.0, 2.0/3.0, 0.0, + 0.0, 2.0/3.0, 0.0, + 2.0/3.0, 2.0/3.0, 0.0, + -2.0/3.0, -2.0/3.0, 2.0/3.0, + 0.0, -2.0/3.0, 2.0/3.0, + 2.0/3.0, -2.0/3.0, 2.0/3.0, + -2.0/3.0, 0.0, 2.0/3.0, + 0.0, 0.0, 2.0/3.0, + 2.0/3.0, 0.0, 2.0/3.0, + -2.0/3.0, 2.0/3.0, 2.0/3.0, + 0.0, 2.0/3.0, 2.0/3.0, + 2.0/3.0, 2.0/3.0, 2.0/3.0 +}; + +static const REAL group7bits[125*3]= +{ + -0.8,-0.8,-0.8, -0.4,-0.8,-0.8, 0.0,-0.8,-0.8, 0.4,-0.8,-0.8, 0.8,-0.8,-0.8, + -0.8,-0.4,-0.8, -0.4,-0.4,-0.8, 0.0,-0.4,-0.8, 0.4,-0.4,-0.8, 0.8,-0.4,-0.8, + -0.8, 0.0,-0.8, -0.4, 0.0,-0.8, 0.0, 0.0,-0.8, 0.4, 0.0,-0.8, 0.8, 0.0,-0.8, + -0.8, 0.4,-0.8, -0.4, 0.4,-0.8, 0.0, 0.4,-0.8, 0.4, 0.4,-0.8, 0.8, 0.4,-0.8, + -0.8, 0.8,-0.8, -0.4, 0.8,-0.8, 0.0, 0.8,-0.8, 0.4, 0.8,-0.8, 0.8, 0.8,-0.8, + -0.8,-0.8,-0.4, -0.4,-0.8,-0.4, 0.0,-0.8,-0.4, 0.4,-0.8,-0.4, 0.8,-0.8,-0.4, + -0.8,-0.4,-0.4, -0.4,-0.4,-0.4, 0.0,-0.4,-0.4, 0.4,-0.4,-0.4, 0.8,-0.4,-0.4, + -0.8, 0.0,-0.4, -0.4, 0.0,-0.4, 0.0, 0.0,-0.4, 0.4, 0.0,-0.4, 0.8, 0.0,-0.4, + -0.8, 0.4,-0.4, -0.4, 0.4,-0.4, 0.0, 0.4,-0.4, 0.4, 0.4,-0.4, 0.8, 0.4,-0.4, + -0.8, 0.8,-0.4, -0.4, 0.8,-0.4, 0.0, 0.8,-0.4, 0.4, 0.8,-0.4, 0.8, 0.8,-0.4, + -0.8,-0.8, 0.0, -0.4,-0.8, 0.0, 0.0,-0.8, 0.0, 0.4,-0.8, 0.0, 0.8,-0.8, 0.0, + -0.8,-0.4, 0.0, -0.4,-0.4, 0.0, 0.0,-0.4, 0.0, 0.4,-0.4, 0.0, 0.8,-0.4, 0.0, + -0.8, 0.0, 0.0, -0.4, 0.0, 0.0, 0.0, 0.0, 0.0, 0.4, 0.0, 0.0, 0.8, 0.0, 0.0, + -0.8, 0.4, 0.0, -0.4, 0.4, 0.0, 0.0, 0.4, 0.0, 0.4, 0.4, 0.0, 0.8, 0.4, 0.0, + -0.8, 0.8, 0.0, -0.4, 0.8, 0.0, 0.0, 0.8, 0.0, 0.4, 0.8, 0.0, 0.8, 0.8, 0.0, + -0.8,-0.8, 0.4, -0.4,-0.8, 0.4, 0.0,-0.8, 0.4, 0.4,-0.8, 0.4, 0.8,-0.8, 0.4, + -0.8,-0.4, 0.4, -0.4,-0.4, 0.4, 0.0,-0.4, 0.4, 0.4,-0.4, 0.4, 0.8,-0.4, 0.4, + -0.8, 0.0, 0.4, -0.4, 0.0, 0.4, 0.0, 0.0, 0.4, 0.4, 0.0, 0.4, 0.8, 0.0, 0.4, + -0.8, 0.4, 0.4, -0.4, 0.4, 0.4, 0.0, 0.4, 0.4, 0.4, 0.4, 0.4, 0.8, 0.4, 0.4, + -0.8, 0.8, 0.4, -0.4, 0.8, 0.4, 0.0, 0.8, 0.4, 0.4, 0.8, 0.4, 0.8, 0.8, 0.4, + -0.8,-0.8, 0.8, -0.4,-0.8, 0.8, 0.0,-0.8, 0.8, 0.4,-0.8, 0.8, 0.8,-0.8, 0.8, + -0.8,-0.4, 0.8, -0.4,-0.4, 0.8, 0.0,-0.4, 0.8, 0.4,-0.4, 0.8, 0.8,-0.4, 0.8, + -0.8, 0.0, 0.8, -0.4, 0.0, 0.8, 0.0, 0.0, 0.8, 0.4, 0.0, 0.8, 0.8, 0.0, 0.8, + -0.8, 0.4, 0.8, -0.4, 0.4, 0.8, 0.0, 0.4, 0.8, 0.4, 0.4, 0.8, 0.8, 0.4, 0.8, + -0.8, 0.8, 0.8, -0.4, 0.8, 0.8, 0.0, 0.8, 0.8, 0.4, 0.8, 0.8, 0.8, 0.8, 0.8 +}; + +static const REAL group10bits[729*3]= +{ + -8.0/9.0,-8.0/9.0,-8.0/9.0, -6.0/9.0,-8.0/9.0,-8.0/9.0, -4.0/9.0,-8.0/9.0,-8.0/9.0, + -2.0/9.0,-8.0/9.0,-8.0/9.0, 0.0,-8.0/9.0,-8.0/9.0, 2.0/9.0,-8.0/9.0,-8.0/9.0, + 4.0/9.0,-8.0/9.0,-8.0/9.0, 6.0/9.0,-8.0/9.0,-8.0/9.0, 8.0/9.0,-8.0/9.0,-8.0/9.0, + -8.0/9.0,-6.0/9.0,-8.0/9.0, -6.0/9.0,-6.0/9.0,-8.0/9.0, -4.0/9.0,-6.0/9.0,-8.0/9.0, + -2.0/9.0,-6.0/9.0,-8.0/9.0, 0.0,-6.0/9.0,-8.0/9.0, 2.0/9.0,-6.0/9.0,-8.0/9.0, + 4.0/9.0,-6.0/9.0,-8.0/9.0, 6.0/9.0,-6.0/9.0,-8.0/9.0, 8.0/9.0,-6.0/9.0,-8.0/9.0, + -8.0/9.0,-4.0/9.0,-8.0/9.0, -6.0/9.0,-4.0/9.0,-8.0/9.0, -4.0/9.0,-4.0/9.0,-8.0/9.0, + -2.0/9.0,-4.0/9.0,-8.0/9.0, 0.0,-4.0/9.0,-8.0/9.0, 2.0/9.0,-4.0/9.0,-8.0/9.0, + 4.0/9.0,-4.0/9.0,-8.0/9.0, 6.0/9.0,-4.0/9.0,-8.0/9.0, 8.0/9.0,-4.0/9.0,-8.0/9.0, + -8.0/9.0,-2.0/9.0,-8.0/9.0, -6.0/9.0,-2.0/9.0,-8.0/9.0, -4.0/9.0,-2.0/9.0,-8.0/9.0, + -2.0/9.0,-2.0/9.0,-8.0/9.0, 0.0,-2.0/9.0,-8.0/9.0, 2.0/9.0,-2.0/9.0,-8.0/9.0, + 4.0/9.0,-2.0/9.0,-8.0/9.0, 6.0/9.0,-2.0/9.0,-8.0/9.0, 8.0/9.0,-2.0/9.0,-8.0/9.0, + -8.0/9.0, 0.0,-8.0/9.0, -6.0/9.0, 0.0,-8.0/9.0, -4.0/9.0, 0.0,-8.0/9.0, + -2.0/9.0, 0.0,-8.0/9.0, 0.0, 0.0,-8.0/9.0, 2.0/9.0, 0.0,-8.0/9.0, + 4.0/9.0, 0.0,-8.0/9.0, 6.0/9.0, 0.0,-8.0/9.0, 8.0/9.0, 0.0,-8.0/9.0, + -8.0/9.0, 2.0/9.0,-8.0/9.0, -6.0/9.0, 2.0/9.0,-8.0/9.0, -4.0/9.0, 2.0/9.0,-8.0/9.0, + -2.0/9.0, 2.0/9.0,-8.0/9.0, 0.0, 2.0/9.0,-8.0/9.0, 2.0/9.0, 2.0/9.0,-8.0/9.0, + 4.0/9.0, 2.0/9.0,-8.0/9.0, 6.0/9.0, 2.0/9.0,-8.0/9.0, 8.0/9.0, 2.0/9.0,-8.0/9.0, + -8.0/9.0, 4.0/9.0,-8.0/9.0, -6.0/9.0, 4.0/9.0,-8.0/9.0, -4.0/9.0, 4.0/9.0,-8.0/9.0, + -2.0/9.0, 4.0/9.0,-8.0/9.0, 0.0, 4.0/9.0,-8.0/9.0, 2.0/9.0, 4.0/9.0,-8.0/9.0, + 4.0/9.0, 4.0/9.0,-8.0/9.0, 6.0/9.0, 4.0/9.0,-8.0/9.0, 8.0/9.0, 4.0/9.0,-8.0/9.0, + -8.0/9.0, 6.0/9.0,-8.0/9.0, -6.0/9.0, 6.0/9.0,-8.0/9.0, -4.0/9.0, 6.0/9.0,-8.0/9.0, + -2.0/9.0, 6.0/9.0,-8.0/9.0, 0.0, 6.0/9.0,-8.0/9.0, 2.0/9.0, 6.0/9.0,-8.0/9.0, + 4.0/9.0, 6.0/9.0,-8.0/9.0, 6.0/9.0, 6.0/9.0,-8.0/9.0, 8.0/9.0, 6.0/9.0,-8.0/9.0, + -8.0/9.0, 8.0/9.0,-8.0/9.0, -6.0/9.0, 8.0/9.0,-8.0/9.0, -4.0/9.0, 8.0/9.0,-8.0/9.0, + -2.0/9.0, 8.0/9.0,-8.0/9.0, 0.0, 8.0/9.0,-8.0/9.0, 2.0/9.0, 8.0/9.0,-8.0/9.0, + 4.0/9.0, 8.0/9.0,-8.0/9.0, 6.0/9.0, 8.0/9.0,-8.0/9.0, 8.0/9.0, 8.0/9.0,-8.0/9.0, + -8.0/9.0,-8.0/9.0,-6.0/9.0, -6.0/9.0,-8.0/9.0,-6.0/9.0, -4.0/9.0,-8.0/9.0,-6.0/9.0, + -2.0/9.0,-8.0/9.0,-6.0/9.0, 0.0,-8.0/9.0,-6.0/9.0, 2.0/9.0,-8.0/9.0,-6.0/9.0, + 4.0/9.0,-8.0/9.0,-6.0/9.0, 6.0/9.0,-8.0/9.0,-6.0/9.0, 8.0/9.0,-8.0/9.0,-6.0/9.0, + -8.0/9.0,-6.0/9.0,-6.0/9.0, -6.0/9.0,-6.0/9.0,-6.0/9.0, -4.0/9.0,-6.0/9.0,-6.0/9.0, + -2.0/9.0,-6.0/9.0,-6.0/9.0, 0.0,-6.0/9.0,-6.0/9.0, 2.0/9.0,-6.0/9.0,-6.0/9.0, + 4.0/9.0,-6.0/9.0,-6.0/9.0, 6.0/9.0,-6.0/9.0,-6.0/9.0, 8.0/9.0,-6.0/9.0,-6.0/9.0, + -8.0/9.0,-4.0/9.0,-6.0/9.0, -6.0/9.0,-4.0/9.0,-6.0/9.0, -4.0/9.0,-4.0/9.0,-6.0/9.0, + -2.0/9.0,-4.0/9.0,-6.0/9.0, 0.0,-4.0/9.0,-6.0/9.0, 2.0/9.0,-4.0/9.0,-6.0/9.0, + 4.0/9.0,-4.0/9.0,-6.0/9.0, 6.0/9.0,-4.0/9.0,-6.0/9.0, 8.0/9.0,-4.0/9.0,-6.0/9.0, + -8.0/9.0,-2.0/9.0,-6.0/9.0, -6.0/9.0,-2.0/9.0,-6.0/9.0, -4.0/9.0,-2.0/9.0,-6.0/9.0, + -2.0/9.0,-2.0/9.0,-6.0/9.0, 0.0,-2.0/9.0,-6.0/9.0, 2.0/9.0,-2.0/9.0,-6.0/9.0, + 4.0/9.0,-2.0/9.0,-6.0/9.0, 6.0/9.0,-2.0/9.0,-6.0/9.0, 8.0/9.0,-2.0/9.0,-6.0/9.0, + -8.0/9.0, 0.0,-6.0/9.0, -6.0/9.0, 0.0,-6.0/9.0, -4.0/9.0, 0.0,-6.0/9.0, + -2.0/9.0, 0.0,-6.0/9.0, 0.0, 0.0,-6.0/9.0, 2.0/9.0, 0.0,-6.0/9.0, + 4.0/9.0, 0.0,-6.0/9.0, 6.0/9.0, 0.0,-6.0/9.0, 8.0/9.0, 0.0,-6.0/9.0, + -8.0/9.0, 2.0/9.0,-6.0/9.0, -6.0/9.0, 2.0/9.0,-6.0/9.0, -4.0/9.0, 2.0/9.0,-6.0/9.0, + -2.0/9.0, 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8.0/9.0, 2.0/9.0, 8.0/9.0, 8.0/9.0, + 4.0/9.0, 8.0/9.0, 8.0/9.0, 6.0/9.0, 8.0/9.0, 8.0/9.0, 8.0/9.0, 8.0/9.0, 8.0/9.0 +}; + + +static const REAL *grouptableA[16] = +{ 0,group5bits,group7bits,group10bits,0,0,0,0,0,0,0,0,0,0,0,0}; +static const REAL *grouptableB1[16] = +{ 0,group5bits,0,0,0,0,0,0,0,0,0,0,0,0,0,0 }; +static const REAL *grouptableB234[16] = +{ 0,group5bits,group7bits,0,group10bits,0,0,0,0,0,0,0,0,0,0,0}; + +static const int codelengthtableA[16] = +{ 0, 5, 7, 10, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 }; +static const int codelengthtableB1[16] = +{ 0, 5, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16 }; +static const int codelengthtableB2[16] = +{ 0, 5, 7, 3, 10, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 16 }; +static const int codelengthtableB3[8] = { 0, 5, 7, 3, 10, 4, 5, 16 }; +static const int codelengthtableB4[4] = { 0, 5, 7, 16 }; + + +static const REAL factortableA[16] = +{ 0.0, 1.0/2.0, 1.0/4.0, 1.0/8.0, + 1.0/8.0, 1.0/16.0, 1.0/32.0, 1.0/64.0, + 1.0/128.0, 1.0/256.0, 1.0/512.0, 1.0/1024.0, + 1.0/2048.0, 1.0/4096.0, 1.0/8192.0, 1.0/16384.0 }; +static const REAL factortableB1[16] = +{ 0.0, 1.0/2.0, 1.0/4.0, 1.0/8.0, + 1.0/16.0, 1.0/32.0, 1.0/64.0, 1.0/128.0, + 1.0/256.0, 1.0/512.0, 1.0/1024.0, 1.0/2048.0, + 1.0/4096.0, 1.0/8192.0, 1.0/16384.0, 1.0/32768.0 }; +static const REAL factortableB2[16] = +{ 0.0, 1.0/2.0, 1.0/4.0, 1.0/4.0, + 1.0/8.0, 1.0/8.0, 1.0/16.0, 1.0/32.0, + 1.0/64.0, 1.0/128.0, 1.0/256.0, 1.0/512.0, + 1.0/1024.0, 1.0/2048.0, 1.0/4096.0, 1.0/32768.0 }; +static const REAL factortableB3[8] = +{ 0.0, 1.0/2.0, 1.0/4.0, 1.0/4.0, 1.0/8.0, 1.0/8.0, 1.0/16.0, 1.0/32768.0 }; +static const REAL factortableB4[4] = { 0.0, 1.0/2.0, 1.0/4.0, 1.0/32768.0 }; + + +static const REAL ctableA[16]= +{ 0.0, 1.33333333333, 1.60000000000, 1.77777777777, + 1.06666666666, 1.03225806452, 1.01587301587, 1.00787401575, + 1.00392156863, 1.00195694716, 1.00097751711, 1.00048851979, + 1.00024420024, 1.00012208522, 1.00006103888, 1.00003051851}; +static const REAL ctableB1[16]= +{ 0.0, 1.33333333333, 1.14285714286, 1.06666666666, + 1.03225806452, 1.01587301587, 1.00787401575, 1.00392156863, + 1.00195694716, 1.00097751711, 1.00048851979, 1.00024420024, + 1.00012208522, 1.00006103888, 1.00003051851, 1.00001525902}; +static const REAL ctableB2[16] = +{ 0.0, 1.33333333333, 1.60000000000, 1.14285714286, + 1.77777777777, 1.06666666666, 1.03225806452, 1.01587301587, + 1.00787401575, 1.00392156863, 1.00195694716, 1.00097751711, + 1.00048851979, 1.00024420024, 1.00012208522, 1.00001525902}; +static const REAL ctableB3[8] = +{ 0.0, 1.33333333333, 1.60000000000, 1.14285714286, + 1.77777777777, 1.06666666666, 1.03225806452, 1.00001525902 }; +static const REAL ctableB4[4] = +{ 0.0, 1.33333333333, 1.60000000000, 1.00001525902 }; + + +static const REAL dtableA[16]= +{ 0.0, 0.50000000000, 0.50000000000, 0.50000000000, + 0.12500000000, 0.06250000000, 0.03125000000, 0.01562500000, + 0.00781250000, 0.00390625000, 0.00195312500, 0.00097656250, + 0.00048828125, 0.00024414063, 0.00012207031, 0.00006103516}; + +static const REAL dtableB1[16]= +{ 0.0, 0.50000000000, 0.25000000000, 0.12500000000, + 0.06250000000, 0.03125000000, 0.01562500000, 0.00781250000, + 0.00390625000, 0.00195312500, 0.00097656250, 0.00048828125, + 0.00024414063, 0.00012207031, 0.00006103516, 0.00003051758}; + +static const REAL dtableB2[16]= +{ 0.0, 0.50000000000, 0.50000000000, 0.25000000000, + 0.50000000000, 0.12500000000, 0.06250000000, 0.03125000000, + 0.01562500000, 0.00781250000, 0.00390625000, 0.00195312500, + 0.00097656250, 0.00048828125, 0.00024414063, 0.00003051758}; + +static const REAL dtableB3[8]= +{ 0.0, 0.50000000000, 0.50000000000, 0.25000000000, + 0.50000000000, 0.12500000000, 0.06250000000, 0.00003051758}; + +static const REAL dtableB4[4]= +{0.0, 0.50000000000, 0.50000000000, 0.00003051758}; + + +// Mpeg layer 2 +void Mpegtoraw::extractlayer2(void) +{ + REAL fraction[MAXCHANNEL][3][MAXSUBBAND]; + unsigned int bitalloc[MAXCHANNEL][MAXSUBBAND], + scaleselector[MAXCHANNEL][MAXSUBBAND]; + REAL scalefactor[2][3][MAXSUBBAND]; + + const REAL *group[MAXCHANNEL][MAXSUBBAND]; + unsigned int codelength[MAXCHANNEL][MAXSUBBAND]; + REAL factor[MAXCHANNEL][MAXSUBBAND]; + REAL c[MAXCHANNEL][MAXSUBBAND],d[MAXCHANNEL][MAXSUBBAND]; + + int s=stereobound,n=subbandnumber; + + +// Bitalloc + { + register int i; + register const int *t=bitalloclengthtable[tableindex]; + + for(i=0;i<s;i++,t++) + { + bitalloc[LS][i]=getbits(*t); + bitalloc[RS][i]=getbits(*t); + } + for(;i<n;i++,t++) + bitalloc[LS][i]=bitalloc[RS][i]=getbits(*t); + } + + + // Scale selector + if(inputstereo) + for(register int i=0;i<n;i++) + { + if(bitalloc[LS][i])scaleselector[LS][i]=getbits(2); + if(bitalloc[RS][i])scaleselector[RS][i]=getbits(2); + } + else + for(register int i=0;i<n;i++) + if(bitalloc[LS][i])scaleselector[LS][i]=getbits(2); + + // Scale index + { + register int i,j; + + for(i=0;i<n;i++) + { + if((j=bitalloc[LS][i])) + { + if(!tableindex) + { + group[LS][i]=grouptableA[j]; + codelength[LS][i]=codelengthtableA[j]; + factor[LS][i]=factortableA[j]; + c[LS][i]=ctableA[j]; + d[LS][i]=dtableA[j]; + } + else + { + if(i<=2) + { + group[LS][i]=grouptableB1[j]; + codelength[LS][i]=codelengthtableB1[j]; + factor[LS][i]=factortableB1[j]; + c[LS][i]=ctableB1[j]; + d[LS][i]=dtableB1[j]; + } + else + { + group[LS][i]=grouptableB234[j]; + if(i<=10) + { + codelength[LS][i]=codelengthtableB2[j]; + factor[LS][i]=factortableB2[j]; + c[LS][i]=ctableB2[j]; + d[LS][i]=dtableB2[j]; + } + else if(i<=22) + { + codelength[LS][i]=codelengthtableB3[j]; + factor[LS][i]=factortableB3[j]; + c[LS][i]=ctableB3[j]; + d[LS][i]=dtableB3[j]; + } + else + { + codelength[LS][i]=codelengthtableB4[j]; + factor[LS][i]=factortableB4[j]; + c[LS][i]=ctableB4[j]; + d[LS][i]=dtableB4[j]; + } + } + } + + switch(scaleselector[LS][i]) + { + case 0:scalefactor[LS][0][i]=scalefactorstable[getbits(6)]; + scalefactor[LS][1][i]=scalefactorstable[getbits(6)]; + scalefactor[LS][2][i]=scalefactorstable[getbits(6)]; + break; + case 1:scalefactor[LS][0][i]= + scalefactor[LS][1][i]=scalefactorstable[getbits(6)]; + scalefactor[LS][2][i]=scalefactorstable[getbits(6)]; + break; + case 2:scalefactor[LS][0][i]= + scalefactor[LS][1][i]= + scalefactor[LS][2][i]=scalefactorstable[getbits(6)]; + break; + case 3:scalefactor[LS][0][i]=scalefactorstable[getbits(6)]; + scalefactor[LS][1][i]= + scalefactor[LS][2][i]=scalefactorstable[getbits(6)]; + break; + } + } + + if(inputstereo && (j=bitalloc[RS][i])) + { + if(!tableindex) + { + group[RS][i]=grouptableA[j]; + codelength[RS][i]=codelengthtableA[j]; + factor[RS][i]=factortableA[j]; + c[RS][i]=ctableA[j]; + d[RS][i]=dtableA[j]; + } + else + { + if(i<=2) + { + group[RS][i]=grouptableB1[j]; + codelength[RS][i]=codelengthtableB1[j]; + factor[RS][i]=factortableB1[j]; + c[RS][i]=ctableB1[j]; + d[RS][i]=dtableB1[j]; + } + else + { + group[RS][i]=grouptableB234[j]; + if(i<=10) + { + codelength[RS][i]=codelengthtableB2[j]; + factor[RS][i]=factortableB2[j]; + c[RS][i]=ctableB2[j]; + d[RS][i]=dtableB2[j]; + } + else if(i<=22) + { + codelength[RS][i]=codelengthtableB3[j]; + factor[RS][i]=factortableB3[j]; + c[RS][i]=ctableB3[j]; + d[RS][i]=dtableB3[j]; + } + else + { + codelength[RS][i]=codelengthtableB4[j]; + factor[RS][i]=factortableB4[j]; + c[RS][i]=ctableB4[j]; + d[RS][i]=dtableB4[j]; + } + } + } + + switch(scaleselector[RS][i]) + { + case 0 : scalefactor[RS][0][i]=scalefactorstable[getbits(6)]; + scalefactor[RS][1][i]=scalefactorstable[getbits(6)]; + scalefactor[RS][2][i]=scalefactorstable[getbits(6)]; + break; + case 1 : scalefactor[RS][0][i]= + scalefactor[RS][1][i]=scalefactorstable[getbits(6)]; + scalefactor[RS][2][i]=scalefactorstable[getbits(6)]; + break; + case 2 : scalefactor[RS][0][i]= + scalefactor[RS][1][i]= + scalefactor[RS][2][i]=scalefactorstable[getbits(6)]; + break; + case 3 : scalefactor[RS][0][i]=scalefactorstable[getbits(6)]; + scalefactor[RS][1][i]= + scalefactor[RS][2][i]=scalefactorstable[getbits(6)]; + break; + } + } + } + } + + +// Read Sample + { + register int i; + + for(int l=0;l<SCALEBLOCK;l++) + { + // Read Sample + for(i=0;i<s;i++) + { + if(bitalloc[LS][i]) + { + if(group[LS][i]) + { + register const REAL *s; + int code=getbits(codelength[LS][i]); + + code+=code<<1; + s=group[LS][i]+code; + + fraction[LS][0][i]=s[0]; + fraction[LS][1][i]=s[1]; + fraction[LS][2][i]=s[2]; + } + else + { + fraction[LS][0][i]= + REAL(getbits(codelength[LS][i]))*factor[LS][i]-1.0; + fraction[LS][1][i]= + REAL(getbits(codelength[LS][i]))*factor[LS][i]-1.0; + fraction[LS][2][i]= + REAL(getbits(codelength[LS][i]))*factor[LS][i]-1.0; + } + } + else fraction[LS][0][i]=fraction[LS][1][i]=fraction[LS][2][i]=0.0; + + if(inputstereo && bitalloc[RS][i]) + { + if(group[RS][i]) + { + const REAL *s; + int code=getbits(codelength[RS][i]); + + code+=code<<1; + s=group[RS][i]+code; + + fraction[RS][0][i]=s[0]; + fraction[RS][1][i]=s[1]; + fraction[RS][2][i]=s[2]; + } + else + { + fraction[RS][0][i]= + REAL(getbits(codelength[RS][i]))*factor[RS][i]-1.0; + fraction[RS][1][i]= + REAL(getbits(codelength[RS][i]))*factor[RS][i]-1.0; + fraction[RS][2][i]= + REAL(getbits(codelength[RS][i]))*factor[RS][i]-1.0; + } + } + else fraction[RS][0][i]=fraction[RS][1][i]=fraction[RS][2][i]=0.0; + } + + for(;i<n;i++) + { + if(bitalloc[LS][i]) + { + if(group[LS][i]) + { + register const REAL *s; + int code=getbits(codelength[LS][i]); + + code+=code<<1; + s=group[LS][i]+code; + + fraction[LS][0][i]=fraction[RS][0][i]=s[0]; + fraction[LS][1][i]=fraction[RS][1][i]=s[1]; + fraction[LS][2][i]=fraction[RS][2][i]=s[2]; + } + else + { + fraction[LS][0][i]=fraction[RS][0][i]= + REAL(getbits(codelength[LS][i]))*factor[LS][i]-1.0; + fraction[LS][1][i]=fraction[RS][1][i]= + REAL(getbits(codelength[LS][i]))*factor[LS][i]-1.0; + fraction[LS][2][i]=fraction[RS][2][i]= + REAL(getbits(codelength[LS][i]))*factor[LS][i]-1.0; + } + } + else fraction[LS][0][i]=fraction[LS][1][i]=fraction[LS][2][i]= + fraction[RS][0][i]=fraction[RS][1][i]=fraction[RS][2][i]=0.0; + } + + + + //Fraction + if(outputstereo) + for(i=0;i<n;i++) + { + if(bitalloc[LS][i]) + { + if(!group[LS][i]) + { + fraction[LS][0][i]=(fraction[LS][0][i]+d[LS][i])*c[LS][i]; + fraction[LS][1][i]=(fraction[LS][1][i]+d[LS][i])*c[LS][i]; + fraction[LS][2][i]=(fraction[LS][2][i]+d[LS][i])*c[LS][i]; + } + + register REAL t=scalefactor[LS][l>>2][i]; + fraction[LS][0][i]*=t; + fraction[LS][1][i]*=t; + fraction[LS][2][i]*=t; + } + + if(bitalloc[RS][i]) + { + if(!group[RS][i]) + { + fraction[RS][0][i]=(fraction[RS][0][i]+d[RS][i])*c[LS][i]; + fraction[RS][1][i]=(fraction[RS][1][i]+d[RS][i])*c[LS][i]; + fraction[RS][2][i]=(fraction[RS][2][i]+d[RS][i])*c[LS][i]; + } + + register REAL t=scalefactor[RS][l>>2][i]; + fraction[RS][0][i]*=t; + fraction[RS][1][i]*=t; + fraction[RS][2][i]*=t; + } + } + else + for(i=0;i<n;i++) + if(bitalloc[LS][i]) + { + if(!group[LS][i]) + { + fraction[LS][0][i]=(fraction[LS][0][i]+d[LS][i])*c[LS][i]; + fraction[LS][1][i]=(fraction[LS][1][i]+d[LS][i])*c[LS][i]; + fraction[LS][2][i]=(fraction[LS][2][i]+d[LS][i])*c[LS][i]; + } + + register REAL t=scalefactor[LS][l>>2][i]; + fraction[LS][0][i]*=t; + fraction[LS][1][i]*=t; + fraction[LS][2][i]*=t; + } + + for(;i<MAXSUBBAND;i++) + fraction[LS][0][i]=fraction[LS][1][i]=fraction[LS][2][i]= + fraction[RS][0][i]=fraction[RS][1][i]=fraction[RS][2][i]=0.0; + + for(i=0;i<3;i++) + subbandsynthesis(fraction[LS][i],fraction[RS][i]); + } + } +} |