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43 lines
1.2 KiB
C
43 lines
1.2 KiB
C
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/* this file is a part of amp software, (C) tomislav uzelac 1996,1997
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*/
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/* getdata.h
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*
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* tomislav uzelac Apr 1996
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*/
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extern int decode_scalefactors(struct SIDE_INFO *info,struct AUDIO_HEADER *header,int gr,int ch);
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extern int is_max[21];
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extern int intensity_scale;
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#ifdef GETDATA
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static char t_slen1[16]={0,0,0,0,3,1,1,1,2,2,2,3,3,3,4,4};
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static char t_slen2[16]={0,1,2,3,0,1,2,3,1,2,3,1,2,3,2,3};
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int is_max[21]; /* the maximum value of is_pos. for short blocks is_max[sfb=0] == is_max[6],
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* it's sloppy but i'm sick of waisting storage. blaah...
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*/
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int intensity_scale;
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int decode_scalefactors(struct SIDE_INFO *info,struct AUDIO_HEADER *header,int gr,int ch);
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/* my implementation of MPEG2 scalefactor decoding is, admitably, horrible
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* anyway, just take a look at pg.18 of MPEG2 specs, and you'll know what
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* this is all about
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*/
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static const char spooky_table[2][3][3][4]={
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{
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{ {6,5,5,5}, {9,9,9,9}, {6,9,9,9} },
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{ {6,5,7,3}, {9,9,12,6}, {6,9,12,6}},
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{ {11,10,0,0}, {18,18,0,0}, {15,18,0,0}}
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},
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{
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{ {7,7,7,0}, {12,12,12,0}, {6,15,12,0}},
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{ {6,6,6,3}, {12,9,9,6}, {6,12,9,6}},
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{ {8,8,5,0}, {15,12,9,0}, {6,18,9,0}}
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}};
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#endif /* GETDATA */
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