95 lines
4.3 KiB
C
95 lines
4.3 KiB
C
/*
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l3bandinfo.h: the layer III bandInfo structures and gainpow2_scale
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copyright 1995-2021 by the mpg123 project - free software under the terms of the LGPL 2.1
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see COPYING and AUTHORS files in distribution or http://mpg123.org
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initially written by Michael Hipp
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This is separated out of layer3.c to re-use independently in calctables.
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*/
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struct bandInfoStruct
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{
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unsigned short longIdx[23];
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unsigned char longDiff[22];
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unsigned short shortIdx[14];
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unsigned char shortDiff[13];
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};
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/* Techy details about our friendly MPEG data. Fairly constant over the years;-) */
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static const struct bandInfoStruct bandInfo[9] =
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{
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{ /* MPEG 1.0 */
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{0,4,8,12,16,20,24,30,36,44,52,62,74, 90,110,134,162,196,238,288,342,418,576},
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{4,4,4,4,4,4,6,6,8, 8,10,12,16,20,24,28,34,42,50,54, 76,158},
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{0,4*3,8*3,12*3,16*3,22*3,30*3,40*3,52*3,66*3, 84*3,106*3,136*3,192*3},
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{4,4,4,4,6,8,10,12,14,18,22,30,56}
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},
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{
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{0,4,8,12,16,20,24,30,36,42,50,60,72, 88,106,128,156,190,230,276,330,384,576},
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{4,4,4,4,4,4,6,6,6, 8,10,12,16,18,22,28,34,40,46,54, 54,192},
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{0,4*3,8*3,12*3,16*3,22*3,28*3,38*3,50*3,64*3, 80*3,100*3,126*3,192*3},
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{4,4,4,4,6,6,10,12,14,16,20,26,66}
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},
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{
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{0,4,8,12,16,20,24,30,36,44,54,66,82,102,126,156,194,240,296,364,448,550,576},
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{4,4,4,4,4,4,6,6,8,10,12,16,20,24,30,38,46,56,68,84,102, 26},
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{0,4*3,8*3,12*3,16*3,22*3,30*3,42*3,58*3,78*3,104*3,138*3,180*3,192*3},
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{4,4,4,4,6,8,12,16,20,26,34,42,12}
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},
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{ /* MPEG 2.0 */
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{0,6,12,18,24,30,36,44,54,66,80,96,116,140,168,200,238,284,336,396,464,522,576},
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{6,6,6,6,6,6,8,10,12,14,16,20,24,28,32,38,46,52,60,68,58,54 } ,
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{0,4*3,8*3,12*3,18*3,24*3,32*3,42*3,56*3,74*3,100*3,132*3,174*3,192*3} ,
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{4,4,4,6,6,8,10,14,18,26,32,42,18 }
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},
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{ /* Twiddling 3 values here (not just 330->332!) fixed bug 1895025. */
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{0,6,12,18,24,30,36,44,54,66,80,96,114,136,162,194,232,278,332,394,464,540,576},
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{6,6,6,6,6,6,8,10,12,14,16,18,22,26,32,38,46,54,62,70,76,36 },
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{0,4*3,8*3,12*3,18*3,26*3,36*3,48*3,62*3,80*3,104*3,136*3,180*3,192*3},
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{4,4,4,6,8,10,12,14,18,24,32,44,12 }
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},
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{
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{0,6,12,18,24,30,36,44,54,66,80,96,116,140,168,200,238,284,336,396,464,522,576},
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{6,6,6,6,6,6,8,10,12,14,16,20,24,28,32,38,46,52,60,68,58,54 },
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{0,4*3,8*3,12*3,18*3,26*3,36*3,48*3,62*3,80*3,104*3,134*3,174*3,192*3},
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{4,4,4,6,8,10,12,14,18,24,30,40,18 }
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},
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{ /* MPEG 2.5 */
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{0,6,12,18,24,30,36,44,54,66,80,96,116,140,168,200,238,284,336,396,464,522,576},
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{6,6,6,6,6,6,8,10,12,14,16,20,24,28,32,38,46,52,60,68,58,54},
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{0,12,24,36,54,78,108,144,186,240,312,402,522,576},
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{4,4,4,6,8,10,12,14,18,24,30,40,18}
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},
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{
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{0,6,12,18,24,30,36,44,54,66,80,96,116,140,168,200,238,284,336,396,464,522,576},
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{6,6,6,6,6,6,8,10,12,14,16,20,24,28,32,38,46,52,60,68,58,54},
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{0,12,24,36,54,78,108,144,186,240,312,402,522,576},
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{4,4,4,6,8,10,12,14,18,24,30,40,18}
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},
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{
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{0,12,24,36,48,60,72,88,108,132,160,192,232,280,336,400,476,566,568,570,572,574,576},
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{12,12,12,12,12,12,16,20,24,28,32,40,48,56,64,76,90,2,2,2,2,2},
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{0, 24, 48, 72,108,156,216,288,372,480,486,492,498,576},
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{8,8,8,12,16,20,24,28,36,2,2,2,26}
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}
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};
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#if defined(REAL_IS_FIXED) || defined(CALCTABLES)
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static const char gainpow2_scale[256+118+4+1] =
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{
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19,19,19,20,20,20,20,21,21,21,21,22,22,22,22,23,23,23,23,24,24,24,24,25,25,25,25,26,26,26,26,27,
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27,27,27,28,28,28,28,29,29,29,29,30,30,30,30,31,31,31,31,32,32,32,32,33,33,33,33,34,34,34,34,34,
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34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,
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34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,
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34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,
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34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,
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34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,
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34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,
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34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,
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34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,
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34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,
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34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,0
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};
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#endif
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