www.pudn.com > jlayermp3midlet.rar > LayerIIIDecoder.java
/**
*-----------------------------------------------------------------------
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Library General Public License as published
* by the Free Software Foundation; either version 2 of the License,or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this program; if not,write to the Free Software
* Foundation,Inc.,675 Mass Ave,Cambridge,MA 02139,USA.
*----------------------------------------------------------------------
*/
package javazoom.jlme.decoder;
final class LayerIIIDecoder {
private final static int pretab[] = {0,0,0,0,0,0,0,0,0,0,0,1,1,1,1,2,2,3,3,3,2,0};
private final static float two_to_negative_half_pow[] =
{1.0000000000E+00f,7.0710678119E-01f,5.0000000000E-01f,3.5355339059E-01f,
2.5000000000E-01f,1.7677669530E-01f,1.2500000000E-01f,8.8388347648E-02f,
6.2500000000E-02f,4.4194173824E-02f,3.1250000000E-02f,2.2097086912E-02f,
1.5625000000E-02f,1.1048543456E-02f,7.8125000000E-03f,5.5242717280E-03f,
3.9062500000E-03f,2.7621358640E-03f,1.9531250000E-03f,1.3810679320E-03f,
9.7656250000E-04f,6.9053396600E-04f,4.8828125000E-04f,3.4526698300E-04f,
2.4414062500E-04f,1.7263349150E-04f,1.2207031250E-04f,8.6316745750E-05f,
6.1035156250E-05f,4.3158372875E-05f,3.0517578125E-05f,2.1579186438E-05f,
1.5258789062E-05f,1.0789593219E-05f,7.6293945312E-06f,5.3947966094E-06f,
3.8146972656E-06f,2.6973983047E-06f,1.9073486328E-06f,1.3486991523E-06f,
9.5367431641E-07f,6.7434957617E-07f,4.7683715820E-07f,3.3717478809E-07f,
2.3841857910E-07f,1.6858739404E-07f,1.1920928955E-07f,8.4293697022E-08f,
5.9604644775E-08f,4.2146848511E-08f,2.9802322388E-08f,2.1073424255E-08f,
1.4901161194E-08f,1.0536712128E-08f,7.4505805969E-09f,5.2683560639E-09f,
3.7252902985E-09f,2.6341780319E-09f,1.8626451492E-09f,1.3170890160E-09f,
9.3132257462E-10f,6.5854450798E-10f,4.6566128731E-10f,3.2927225399E-10f
};
private final static float t_43[];
static{
t_43 = new float[8192];
float d43 = (float)(4.0 / 3.0);
for (int i = 0; i < 8192; i++)
t_43[i] = (float)pow(i,(int)d43);
}
private final static float TAN12[] =
{
0.0f,0.26794919f,0.57735027f,1.0f,
1.73205081f,3.73205081f,9.9999999e10f,-3.73205081f,
-1.73205081f,-1.0f,-0.57735027f,-0.26794919f,
0.0f,0.26794919f,0.57735027f,1.0f
};
private final static float win[][] =
{
{-1.6141214951E-02f,-5.3603178919E-02f,-1.0070713296E-01f,-1.6280817573E-01f,
-4.9999999679E-01f,-3.8388735032E-01f,-6.2061144372E-01f,-1.1659756083E+00f,
-3.8720752656E+00f,-4.2256286556E+00f,-1.5195289984E+00f,-9.7416483388E-01f,
-7.3744074053E-01f,-1.2071067773E+00f,-5.1636156596E-01f,-4.5426052317E-01f,
-4.0715656898E-01f,-3.6969460527E-01f,-3.3876269197E-01f,-3.1242222492E-01f,
-2.8939587111E-01f,-2.6880081906E-01f,-5.0000000266E-01f,-2.3251417468E-01f,
-2.1596714708E-01f,-2.0004979098E-01f,-1.8449493497E-01f,-1.6905846094E-01f,
-1.5350360518E-01f,-1.3758624925E-01f,-1.2103922149E-01f,-2.0710679058E-01f,
-8.4752577594E-02f,-6.4157525656E-02f,-4.1131172614E-02f,-1.4790705759E-02f},
{-1.6141214951E-02f,-5.3603178919E-02f,-1.0070713296E-01f,-1.6280817573E-01f,
-4.9999999679E-01f,-3.8388735032E-01f,-6.2061144372E-01f,-1.1659756083E+00f,
-3.8720752656E+00f,-4.2256286556E+00f,-1.5195289984E+00f,-9.7416483388E-01f,
-7.3744074053E-01f,-1.2071067773E+00f,-5.1636156596E-01f,-4.5426052317E-01f,
-4.0715656898E-01f,-3.6969460527E-01f,-3.3908542600E-01f,-3.1511810350E-01f,
-2.9642226150E-01f,-2.8184548650E-01f,-5.4119610000E-01f,-2.6213228100E-01f,
-2.5387916537E-01f,-2.3296291359E-01f,-1.9852728987E-01f,-1.5233534808E-01f,
-9.6496400054E-02f,-3.3423828516E-02f,0.0000000000E+00f,0.0000000000E+00f,
0.0000000000E+00f,0.0000000000E+00f,0.0000000000E+00f,0.0000000000E+00f},
{-4.8300800645E-02f,-1.5715656932E-01f,-2.8325045177E-01f,-4.2953747763E-01f,
-1.2071067795E+00f,-8.2426483178E-01f,-1.1451749106E+00f,-1.7695290101E+00f,
-4.5470225061E+00f,-3.4890531002E+00f,-7.3296292804E-01f,-1.5076514758E-01f,
0.0000000000E+00f,0.0000000000E+00f,0.0000000000E+00f,0.0000000000E+00f,
0.0000000000E+00f,0.0000000000E+00f,0.0000000000E+00f,0.0000000000E+00f,
0.0000000000E+00f,0.0000000000E+00f,0.0000000000E+00f,0.0000000000E+00f,
0.0000000000E+00f,0.0000000000E+00f,0.0000000000E+00f,0.0000000000E+00f,
0.0000000000E+00f,0.0000000000E+00f,0.0000000000E+00f,0.0000000000E+00f,
0.0000000000E+00f,0.0000000000E+00f,0.0000000000E+00f,0.0000000000E+00f},
{0.0000000000E+00f,0.0000000000E+00f,0.0000000000E+00f,0.0000000000E+00f,
0.0000000000E+00f,0.0000000000E+00f,-1.5076513660E-01f,-7.3296291107E-01f,
-3.4890530566E+00f,-4.5470224727E+00f,-1.7695290031E+00f,-1.1451749092E+00f,
-8.3137738100E-01f,-1.3065629650E+00f,-5.4142014250E-01f,-4.6528974900E-01f,
-4.1066990750E-01f,-3.7004680800E-01f,-3.3876269197E-01f,-3.1242222492E-01f,
-2.8939587111E-01f,-2.6880081906E-01f,-5.0000000266E-01f,-2.3251417468E-01f,
-2.1596714708E-01f,-2.0004979098E-01f,-1.8449493497E-01f,-1.6905846094E-01f,
-1.5350360518E-01f,-1.3758624925E-01f,-1.2103922149E-01f,-2.0710679058E-01f,
-8.4752577594E-02f,-6.4157525656E-02f,-4.1131172614E-02f,-1.4790705759E-02f}
};
private final static int reorder_table[][] = /* this array is a huge tax on the system */
{
{0,4,8,1,5,9,2,6,10,3,7,11,12,16,20,13,
17,21,14,18,22,15,19,23,24,28,32,25,29,33,26,30,
34,27,31,35,36,42,48,37,43,49,38,44,50,39,45,51,
40,46,52,41,47,53,54,60,66,55,61,67,56,62,68,57,
63,69,58,64,70,59,65,71,72,80,88,73,81,89,74,82,
90,75,83,91,76,84,92,77,85,93,78,86,94,79,87,95,
96,106,116,97,107,117,98,108,118,99,109,119,100,110,120,101,
111,121,102,112,122,103,113,123,104,114,124,105,115,125,126,140,
154,127,141,155,128,142,156,129,143,157,130,144,158,131,145,159,
132,146,160,133,147,161,134,148,162,135,149,163,136,150,164,137,
151,165,138,152,166,139,153,167,168,186,204,169,187,205,170,188,
206,171,189,207,172,190,208,173,191,209,174,192,210,175,193,211,
176,194,212,177,195,213,178,196,214,179,197,215,180,198,216,181,
199,217,182,200,218,183,201,219,184,202,220,185,203,221,222,248,
274,223,249,275,224,250,276,225,251,277,226,252,278,227,253,279,
228,254,280,229,255,281,230,256,282,231,257,283,232,258,284,233,
259,285,234,260,286,235,261,287,236,262,288,237,263,289,238,264,
290,239,265,291,240,266,292,241,267,293,242,268,294,243,269,295,
244,270,296,245,271,297,246,272,298,247,273,299,300,332,364,301,
333,365,302,334,366,303,335,367,304,336,368,305,337,369,306,338,
370,307,339,371,308,340,372,309,341,373,310,342,374,311,343,375,
312,344,376,313,345,377,314,346,378,315,347,379,316,348,380,317,
349,381,318,350,382,319,351,383,320,352,384,321,353,385,322,354,
386,323,355,387,324,356,388,325,357,389,326,358,390,327,359,391,
328,360,392,329,361,393,330,362,394,331,363,395,396,438,480,397,
439,481,398,440,482,399,441,483,400,442,484,401,443,485,402,444,
486,403,445,487,404,446,488,405,447,489,406,448,490,407,449,491,
408,450,492,409,451,493,410,452,494,411,453,495,412,454,496,413,
455,497,414,456,498,415,457,499,416,458,500,417,459,501,418,460,
502,419,461,503,420,462,504,421,463,505,422,464,506,423,465,507,
424,466,508,425,467,509,426,468,510,427,469,511,428,470,512,429,
471,513,430,472,514,431,473,515,432,474,516,433,475,517,434,476,
518,435,477,519,436,478,520,437,479,521,522,540,558,523,541,559,
524,542,560,525,543,561,526,544,562,527,545,563,528,546,564,529,
547,565,530,548,566,531,549,567,532,550,568,533,551,569,534,552,
570,535,553,571,536,554,572,537,555,573,538,556,574,539,557,575},
{0,4,8,1,5,9,2,6,10,3,7,11,12,16,20,13,
17,21,14,18,22,15,19,23,24,28,32,25,29,33,26,30,
34,27,31,35,36,42,48,37,43,49,38,44,50,39,45,51,
40,46,52,41,47,53,54,62,70,55,63,71,56,64,72,57,
65,73,58,66,74,59,67,75,60,68,76,61,69,77,78,88,
98,79,89,99,80,90,100,81,91,101,82,92,102,83,93,103,
84,94,104,85,95,105,86,96,106,87,97,107,108,120,132,109,
121,133,110,122,134,111,123,135,112,124,136,113,125,137,114,126,
138,115,127,139,116,128,140,117,129,141,118,130,142,119,131,143,
144,158,172,145,159,173,146,160,174,147,161,175,148,162,176,149,
163,177,150,164,178,151,165,179,152,166,180,153,167,181,154,168,
182,155,169,183,156,170,184,157,171,185,186,204,222,187,205,223,
188,206,224,189,207,225,190,208,226,191,209,227,192,210,228,193,
211,229,194,212,230,195,213,231,196,214,232,197,215,233,198,216,
234,199,217,235,200,218,236,201,219,237,202,220,238,203,221,239,
240,264,288,241,265,289,242,266,290,243,267,291,244,268,292,245,
269,293,246,270,294,247,271,295,248,272,296,249,273,297,250,274,
298,251,275,299,252,276,300,253,277,301,254,278,302,255,279,303,
256,280,304,257,281,305,258,282,306,259,283,307,260,284,308,261,
285,309,262,286,310,263,287,311,312,344,376,313,345,377,314,346,
378,315,347,379,316,348,380,317,349,381,318,350,382,319,351,383,
320,352,384,321,353,385,322,354,386,323,355,387,324,356,388,325,
357,389,326,358,390,327,359,391,328,360,392,329,361,393,330,362,
394,331,363,395,332,364,396,333,365,397,334,366,398,335,367,399,
336,368,400,337,369,401,338,370,402,339,371,403,340,372,404,341,
373,405,342,374,406,343,375,407,408,452,496,409,453,497,410,454,
498,411,455,499,412,456,500,413,457,501,414,458,502,415,459,503,
416,460,504,417,461,505,418,462,506,419,463,507,420,464,508,421,
465,509,422,466,510,423,467,511,424,468,512,425,469,513,426,470,
514,427,471,515,428,472,516,429,473,517,430,474,518,431,475,519,
432,476,520,433,477,521,434,478,522,435,479,523,436,480,524,437,
481,525,438,482,526,439,483,527,440,484,528,441,485,529,442,486,
530,443,487,531,444,488,532,445,489,533,446,490,534,447,491,535,
448,492,536,449,493,537,450,494,538,451,495,539,540,552,564,541,
553,565,542,554,566,543,555,567,544,556,568,545,557,569,546,558,
570,547,559,571,548,560,572,549,561,573,550,562,574,551,563,575},
{0,4,8,1,5,9,2,6,10,3,7,11,12,16,20,13,
17,21,14,18,22,15,19,23,24,28,32,25,29,33,26,30,
34,27,31,35,36,42,48,37,43,49,38,44,50,39,45,51,
40,46,52,41,47,53,54,62,70,55,63,71,56,64,72,57,
65,73,58,66,74,59,67,75,60,68,76,61,69,77,78,88,
98,79,89,99,80,90,100,81,91,101,82,92,102,83,93,103,
84,94,104,85,95,105,86,96,106,87,97,107,108,120,132,109,
121,133,110,122,134,111,123,135,112,124,136,113,125,137,114,126,
138,115,127,139,116,128,140,117,129,141,118,130,142,119,131,143,
144,158,172,145,159,173,146,160,174,147,161,175,148,162,176,149,
163,177,150,164,178,151,165,179,152,166,180,153,167,181,154,168,
182,155,169,183,156,170,184,157,171,185,186,204,222,187,205,223,
188,206,224,189,207,225,190,208,226,191,209,227,192,210,228,193,
211,229,194,212,230,195,213,231,196,214,232,197,215,233,198,216,
234,199,217,235,200,218,236,201,219,237,202,220,238,203,221,239,
240,264,288,241,265,289,242,266,290,243,267,291,244,268,292,245,
269,293,246,270,294,247,271,295,248,272,296,249,273,297,250,274,
298,251,275,299,252,276,300,253,277,301,254,278,302,255,279,303,
256,280,304,257,281,305,258,282,306,259,283,307,260,284,308,261,
285,309,262,286,310,263,287,311,312,342,372,313,343,373,314,344,
374,315,345,375,316,346,376,317,347,377,318,348,378,319,349,379,
320,350,380,321,351,381,322,352,382,323,353,383,324,354,384,325,
355,385,326,356,386,327,357,387,328,358,388,329,359,389,330,360,
390,331,361,391,332,362,392,333,363,393,334,364,394,335,365,395,
336,366,396,337,367,397,338,368,398,339,369,399,340,370,400,341,
371,401,402,442,482,403,443,483,404,444,484,405,445,485,406,446,
486,407,447,487,408,448,488,409,449,489,410,450,490,411,451,491,
412,452,492,413,453,493,414,454,494,415,455,495,416,456,496,417,
457,497,418,458,498,419,459,499,420,460,500,421,461,501,422,462,
502,423,463,503,424,464,504,425,465,505,426,466,506,427,467,507,
428,468,508,429,469,509,430,470,510,431,471,511,432,472,512,433,
473,513,434,474,514,435,475,515,436,476,516,437,477,517,438,478,
518,439,479,519,440,480,520,441,481,521,522,540,558,523,541,559,
524,542,560,525,543,561,526,544,562,527,545,563,528,546,564,529,
547,565,530,548,566,531,549,567,532,550,568,533,551,569,534,552,
570,535,553,571,536,554,572,537,555,573,538,556,574,539,557,575},
{0,4,8,1,5,9,2,6,10,3,7,11,12,16,20,13,
17,21,14,18,22,15,19,23,24,28,32,25,29,33,26,30,
34,27,31,35,36,40,44,37,41,45,38,42,46,39,43,47,
48,54,60,49,55,61,50,56,62,51,57,63,52,58,64,53,
59,65,66,74,82,67,75,83,68,76,84,69,77,85,70,78,
86,71,79,87,72,80,88,73,81,89,90,100,110,91,101,111,
92,102,112,93,103,113,94,104,114,95,105,115,96,106,116,97,
107,117,98,108,118,99,109,119,120,132,144,121,133,145,122,134,
146,123,135,147,124,136,148,125,137,149,126,138,150,127,139,151,
128,140,152,129,141,153,130,142,154,131,143,155,156,170,184,157,
171,185,158,172,186,159,173,187,160,174,188,161,175,189,162,176,
190,163,177,191,164,178,192,165,179,193,166,180,194,167,181,195,
168,182,196,169,183,197,198,216,234,199,217,235,200,218,236,201,
219,237,202,220,238,203,221,239,204,222,240,205,223,241,206,224,
242,207,225,243,208,226,244,209,227,245,210,228,246,211,229,247,
212,230,248,213,231,249,214,232,250,215,233,251,252,274,296,253,
275,297,254,276,298,255,277,299,256,278,300,257,279,301,258,280,
302,259,281,303,260,282,304,261,283,305,262,284,306,263,285,307,
264,286,308,265,287,309,266,288,310,267,289,311,268,290,312,269,
291,313,270,292,314,271,293,315,272,294,316,273,295,317,318,348,
378,319,349,379,320,350,380,321,351,381,322,352,382,323,353,383,
324,354,384,325,355,385,326,356,386,327,357,387,328,358,388,329,
359,389,330,360,390,331,361,391,332,362,392,333,363,393,334,364,
394,335,365,395,336,366,396,337,367,397,338,368,398,339,369,399,
340,370,400,341,371,401,342,372,402,343,373,403,344,374,404,345,
375,405,346,376,406,347,377,407,408,464,520,409,465,521,410,466,
522,411,467,523,412,468,524,413,469,525,414,470,526,415,471,527,
416,472,528,417,473,529,418,474,530,419,475,531,420,476,532,421,
477,533,422,478,534,423,479,535,424,480,536,425,481,537,426,482,
538,427,483,539,428,484,540,429,485,541,430,486,542,431,487,543,
432,488,544,433,489,545,434,490,546,435,491,547,436,492,548,437,
493,549,438,494,550,439,495,551,440,496,552,441,497,553,442,498,
554,443,499,555,444,500,556,445,501,557,446,502,558,447,503,559,
448,504,560,449,505,561,450,506,562,451,507,563,452,508,564,453,
509,565,454,510,566,455,511,567,456,512,568,457,513,569,458,514,
570,459,515,571,460,516,572,461,517,573,462,518,574,463,519,575},
{0,4,8,1,5,9,2,6,10,3,7,11,12,16,20,13,
17,21,14,18,22,15,19,23,24,28,32,25,29,33,26,30,
34,27,31,35,36,40,44,37,41,45,38,42,46,39,43,47,
48,54,60,49,55,61,50,56,62,51,57,63,52,58,64,53,
59,65,66,72,78,67,73,79,68,74,80,69,75,81,70,76,
82,71,77,83,84,94,104,85,95,105,86,96,106,87,97,107,
88,98,108,89,99,109,90,100,110,91,101,111,92,102,112,93,
103,113,114,126,138,115,127,139,116,128,140,117,129,141,118,130,
142,119,131,143,120,132,144,121,133,145,122,134,146,123,135,147,
124,136,148,125,137,149,150,164,178,151,165,179,152,166,180,153,
167,181,154,168,182,155,169,183,156,170,184,157,171,185,158,172,
186,159,173,187,160,174,188,161,175,189,162,176,190,163,177,191,
192,208,224,193,209,225,194,210,226,195,211,227,196,212,228,197,
213,229,198,214,230,199,215,231,200,216,232,201,217,233,202,218,
234,203,219,235,204,220,236,205,221,237,206,222,238,207,223,239,
240,260,280,241,261,281,242,262,282,243,263,283,244,264,284,245,
265,285,246,266,286,247,267,287,248,268,288,249,269,289,250,270,
290,251,271,291,252,272,292,253,273,293,254,274,294,255,275,295,
256,276,296,257,277,297,258,278,298,259,279,299,300,326,352,301,
327,353,302,328,354,303,329,355,304,330,356,305,331,357,306,332,
358,307,333,359,308,334,360,309,335,361,310,336,362,311,337,363,
312,338,364,313,339,365,314,340,366,315,341,367,316,342,368,317,
343,369,318,344,370,319,345,371,320,346,372,321,347,373,322,348,
374,323,349,375,324,350,376,325,351,377,378,444,510,379,445,511,
380,446,512,381,447,513,382,448,514,383,449,515,384,450,516,385,
451,517,386,452,518,387,453,519,388,454,520,389,455,521,390,456,
522,391,457,523,392,458,524,393,459,525,394,460,526,395,461,527,
396,462,528,397,463,529,398,464,530,399,465,531,400,466,532,401,
467,533,402,468,534,403,469,535,404,470,536,405,471,537,406,472,
538,407,473,539,408,474,540,409,475,541,410,476,542,411,477,543,
412,478,544,413,479,545,414,480,546,415,481,547,416,482,548,417,
483,549,418,484,550,419,485,551,420,486,552,421,487,553,422,488,
554,423,489,555,424,490,556,425,491,557,426,492,558,427,493,559,
428,494,560,429,495,561,430,496,562,431,497,563,432,498,564,433,
499,565,434,500,566,435,501,567,436,502,568,437,503,569,438,504,
570,439,505,571,440,506,572,441,507,573,442,508,574,443,509,575},
{0,4,8,1,5,9,2,6,10,3,7,11,12,16,20,13,
17,21,14,18,22,15,19,23,24,28,32,25,29,33,26,30,
34,27,31,35,36,40,44,37,41,45,38,42,46,39,43,47,
48,54,60,49,55,61,50,56,62,51,57,63,52,58,64,53,
59,65,66,74,82,67,75,83,68,76,84,69,77,85,70,78,
86,71,79,87,72,80,88,73,81,89,90,102,114,91,103,115,
92,104,116,93,105,117,94,106,118,95,107,119,96,108,120,97,
109,121,98,110,122,99,111,123,100,112,124,101,113,125,126,142,
158,127,143,159,128,144,160,129,145,161,130,146,162,131,147,163,
132,148,164,133,149,165,134,150,166,135,151,167,136,152,168,137,
153,169,138,154,170,139,155,171,140,156,172,141,157,173,174,194,
214,175,195,215,176,196,216,177,197,217,178,198,218,179,199,219,
180,200,220,181,201,221,182,202,222,183,203,223,184,204,224,185,
205,225,186,206,226,187,207,227,188,208,228,189,209,229,190,210,
230,191,211,231,192,212,232,193,213,233,234,260,286,235,261,287,
236,262,288,237,263,289,238,264,290,239,265,291,240,266,292,241,
267,293,242,268,294,243,269,295,244,270,296,245,271,297,246,272,
298,247,273,299,248,274,300,249,275,301,250,276,302,251,277,303,
252,278,304,253,279,305,254,280,306,255,281,307,256,282,308,257,
283,309,258,284,310,259,285,311,312,346,380,313,347,381,314,348,
382,315,349,383,316,350,384,317,351,385,318,352,386,319,353,387,
320,354,388,321,355,389,322,356,390,323,357,391,324,358,392,325,
359,393,326,360,394,327,361,395,328,362,396,329,363,397,330,364,
398,331,365,399,332,366,400,333,367,401,334,368,402,335,369,403,
336,370,404,337,371,405,338,372,406,339,373,407,340,374,408,341,
375,409,342,376,410,343,377,411,344,378,412,345,379,413,414,456,
498,415,457,499,416,458,500,417,459,501,418,460,502,419,461,503,
420,462,504,421,463,505,422,464,506,423,465,507,424,466,508,425,
467,509,426,468,510,427,469,511,428,470,512,429,471,513,430,472,
514,431,473,515,432,474,516,433,475,517,434,476,518,435,477,519,
436,478,520,437,479,521,438,480,522,439,481,523,440,482,524,441,
483,525,442,484,526,443,485,527,444,486,528,445,487,529,446,488,
530,447,489,531,448,490,532,449,491,533,450,492,534,451,493,535,
452,494,536,453,495,537,454,496,538,455,497,539,540,552,564,541,
553,565,542,554,566,543,555,567,544,556,568,545,557,569,546,558,
570,547,559,571,548,560,572,549,561,573,550,562,574,551,563,575}
};
private final static int SSLIMIT = 18;
private final static int SBLIMIT = 32;
final static int slen0[] ={0,0,0,0,3,1,1,1,2,2,2,3,3,3,4,4};
final static int slen1[] ={0,1,2,3,0,1,2,3,1,2,3,1,2,3,2,3};
private final static HuffmanTables.Huffman huff = new HuffmanTables.Huffman();
private final static int[] is_pos = new int[576];
private final static float[] is_ratio = new float[576];
private final static float[] tsOutCopy = new float[18];
private final static float[] rawout = new float[36];
private static final int[] is_1d = new int[SBLIMIT * SSLIMIT + 4];
private static final float[][][] ro = new float[2][SBLIMIT][SSLIMIT];
private static final float[][][] lr = new float[2][SBLIMIT][SSLIMIT];
private static final float[] out_1d = new float[SBLIMIT * SSLIMIT];
private static final float[][] prevblck = new float[2][SBLIMIT * SSLIMIT];
private static final float[][] k = new float[2][SBLIMIT * SSLIMIT];
private static int nonzero0,nonzero1;
private static BitStream stream;
private static Header header;
private static SynthesisFilter filter1,filter2;
private static SampleBuffer buffer;
private static int which_channels;
private static BitReserve br;
private static SideInfo si;
public static int[] scalefac0L= new int[23];
public static int[][] scalefac0S= new int[3][13];
public static int[] scalefac1L= new int[23];
public static int[][] scalefac1S= new int[3][13];
private static int max_gr;
private static int frame_start;
private static int part2_start;
private static int channels;
private static int first_channel;
private static int last_channel;
private static int sfreq;
private final static float[] samples1 = new float[32];
private final static float[] samples2 = new float[32];
private static int[] sfBandIndexL;
private static int[] sfBandIndexS;
private static HuffmanTables h;
public LayerIIIDecoder(BitStream stream0,Header header0,SynthesisFilter filtera,SynthesisFilter filterb,SampleBuffer buffer0,int which_ch0) {
stream = stream0;
header = header0;
filter1 = filtera;
filter2 = filterb;
buffer = buffer0;
which_channels = which_ch0;
frame_start = 0;
channels = (header.mode() == Header.SINGLE_CHANNEL) ? 1 : 2;
max_gr = (header.version() == Header.MPEG1) ? 2 : 1;
sfreq = header.sample_frequency() + ((header.version() == Header.MPEG1) ? 3 : 0);
switch(sfreq){
case 0:
sfBandIndexL = new int[]{0,6,12,18,24,30,36,44,54,66,80,96,116,140,168,200,238,284,336,396,464,522,576};
sfBandIndexS = new int[]{0,4,8,12,18,24,32,42,56,74,100,132,174,192};
break;
case 1:
sfBandIndexL = new int[]{0,6,12,18,24,30,36,44,54,66,80,96,114,136,162,194,232,278,330,394,464,540,576};
sfBandIndexS = new int[]{0,4,8,12,18,26,36,48,62,80,104,136,180,192};
break;
case 2:
sfBandIndexL = new int[]{0,6,12,18,24,30,36,44,54,66,80,96,116,140,168,200,238,284,336,396,464,522,576};
sfBandIndexS = new int[]{0,4,8,12,18,26,36,48,62,80,104,134,174,192};
break;
case 3:
sfBandIndexL = new int[]{0,4,8,12,16,20,24,30,36,44,52,62,74,90,110,134,162,196,238,288,342,418,576};
sfBandIndexS = new int[]{0,4,8,12,16,22,30,40,52,66,84,106,136,192};
break;
case 4:
sfBandIndexL = new int[]{0,4,8,12,16,20,24,30,36,42,50,60,72,88,106,128,156,190,230,276,330,384,576};
sfBandIndexS = new int[]{0,4,8,12,16,22,28,38,50,64,80,100,126,192};
break;
case 5:
sfBandIndexL = new int[]{0,4,8,12,16,20,24,30,36,44,54,66,82,102,126,156,194,240,296,364,448,550,576};
sfBandIndexS = new int[]{0,4,8,12,16,22,30,42,58,78,104,138,180,192};
break;
}
if (channels == 2) {
switch (which_channels) {
case OutputChannels.LEFT_CHANNEL:
case OutputChannels.DOWNMIX_CHANNELS:
first_channel = last_channel = 0;
break;
case OutputChannels.RIGHT_CHANNEL:
first_channel = last_channel = 1;
break;
case OutputChannels.BOTH_CHANNELS:
default:
first_channel = 0;
last_channel = 1;
break;
}
}
else {
first_channel = last_channel = 0;
}
for (int ch = 0; ch < 2; ch++) {
for (int j = 0; j < 576; j++) {
prevblck[ch][j] = 0.0f;
}
}
nonzero0 = nonzero1 = 576;
br = new BitReserve();
si = new SideInfo();
h = new HuffmanTables();
}
public final void decodeFrame() {
int compteur = 0;
int nSlots = header.slots();
get_side_info();
for (int i = 0; i < nSlots; i++) {
br.hputbuf(stream.readbits(8));
}
int main_data_end = BitReserve.totbit >>> 3;
int flush_main = (BitReserve.totbit & 7);
if (flush_main != 0) {
br.hgetbits(8 - flush_main);
main_data_end++;
}
// E.B Fix.
int bytes_to_discard = frame_start - main_data_end - si.main_data_begin;
frame_start += nSlots;
if(bytes_to_discard < 0)
return;
// End of E.B Fix.
if (main_data_end > 4096) {
frame_start -= 4096;
br.rewindNbytes(4096);
}
while(bytes_to_discard-->0)
br.hgetbits(8);
//System.out.println("max gr : " + max_gr);
for (int gr = 0; gr < max_gr; gr++) {
for (int ch = 0; ch < channels; ch++) {
part2_start = BitReserve.totbit;
get_scale_factors(ch,gr);
huffman_decode(ch,gr);
dequantize_sample(ro[ch],ch,gr);
}
stereo(gr);
for (int ch = first_channel; ch <= last_channel; ch++) {
reorder(lr[ch],ch,gr);
antialias(ch,gr);
hybrid(ch,gr);
for(int sb18 = 18; sb18 < 576; sb18 += 36){
for(int ss=1; ss < SSLIMIT; ss += 2){
out_1d[sb18 + ss] *= -1;
}
}
if ((ch == 0) || (which_channels == OutputChannels.RIGHT_CHANNEL)) {
for(int ss=0; ss < SSLIMIT; ss++){
for(int sb18 = 0,sb = 0; sb18 < 576; sb18 += 18){
samples1[sb++] = out_1d[sb18 + ss];
}
filter1.calculateSamples(samples1,buffer);
}
}
else {
for(int ss=0; ss < SSLIMIT; ss++){
for(int sb18 = 0,sb = 0; sb18 < 576; sb18 += 18){
samples2[sb++] = out_1d[sb18 + ss];
}
compteur++;
//System.out.println("compute : " + SSLIMIT);
filter2.calculateSamples(samples2,buffer);
}
}
}
}
}
public void invMDCT(final float[] in,final float[] out,final int block_type) {
if (block_type == 2) {
for(int i=0; i<36; i++)
out[i] = 0;
int six_i = 0;
for (int i = 0; i < 3; i++) {
// 12 point IMDCT
// Begin 12 point IDCT
// Input aliasing for 12 pt IDCT
int curr0 = 15+i;
int curr1 = 12+i;
int curr2 = 9+i;
int curr3 = 6+i;
int curr4 = 3+i;
in[curr0] += in[curr1]; in[curr1] += in[curr2]; in[curr2] += in[curr3];
in[curr3] += in[curr4]; in[curr4] += in[i];
// Input aliasing on odd indices (for 6 point IDCT)
in[curr0] += in[curr2]; in[curr2] += in[curr4];
// 3 point IDCT on even indices
float pp2 = in[curr1] * 0.500000000f;
float pp1 = in[curr3] * 0.866025403f;
float sum = in[i] + pp2;
float tmpf_1 = in[i] - in[curr1];
float tmpf_0 = sum + pp1;
float tmpf_2 = sum - pp1;
// End 3 point IDCT on even indices
// 3 point IDCT on odd indices (for 6 point IDCT)
pp2 = in[curr0] * 0.500000000f;
pp1 = in[curr2] * 0.866025403f;
sum = in[curr4] + pp2;
float tmpf_4 = in[curr4] - in[curr0];
float tmpf_5 = sum + pp1;
float tmpf_3 = sum - pp1;
// End 3 point IDCT on odd indices
// Twiddle factors on odd indices (for 6 point IDCT)
tmpf_3 *= 1.931851653f;
tmpf_4 *= 0.707106781f;
tmpf_5 *= 0.517638090f;
// Output butterflies on 2 3 point IDCT's (for 6 point IDCT)
float save = tmpf_0;
tmpf_0 += tmpf_5;
tmpf_5 = save - tmpf_5;
save = tmpf_1;
tmpf_1 += tmpf_4;
tmpf_4 = save - tmpf_4;
save = tmpf_2;
tmpf_2 += tmpf_3;
tmpf_3 = save - tmpf_3;
// End 6 point IDCT
// Twiddle factors on indices (for 12 point IDCT)
tmpf_0 *= 0.504314480f;
tmpf_1 *= 0.541196100f;
tmpf_2 *= 0.630236207f;
tmpf_3 *= 0.821339815f;
tmpf_4 *= 1.306562965f;
tmpf_5 *= 3.830648788f;
// End 12 point IDCT
// Shift to 12 point modified IDCT,multiply by window type 2
float tmpf_8 = -tmpf_0 * 0.793353340f;
float tmpf_9 = -tmpf_0 * 0.608761429f;
float tmpf_7 = -tmpf_1 * 0.923879532f;
float tmpf_10 = -tmpf_1 * 0.382683432f;
float tmpf_6 = -tmpf_2 * 0.991444861f;
float tmpf_11 = -tmpf_2 * 0.130526192f;
tmpf_0 = tmpf_3;
tmpf_1 = tmpf_4 * 0.382683432f;
tmpf_2 = tmpf_5 * 0.608761429f;
tmpf_3 = -tmpf_5 * 0.793353340f;
tmpf_4 = -tmpf_4 * 0.923879532f;
tmpf_5 = -tmpf_0 * 0.991444861f;
tmpf_0 *= 0.130526192f;
out[six_i + 6] += tmpf_0;
out[six_i + 7] += tmpf_1;
out[six_i + 8] += tmpf_2;
out[six_i + 9] += tmpf_3;
out[six_i + 10] += tmpf_4;
out[six_i + 11] += tmpf_5;
out[six_i + 12] += tmpf_6;
out[six_i + 13] += tmpf_7;
out[six_i + 14] += tmpf_8;
out[six_i + 15] += tmpf_9;
out[six_i + 16] += tmpf_10;
out[six_i + 17] += tmpf_11;
six_i += 6;
}
}
else {
// 36 point IDCT
// input aliasing for 36 point IDCT
in[17] += in[16]; in[16] += in[15]; in[15] += in[14]; in[14] += in[13];
in[13] += in[12]; in[12] += in[11]; in[11] += in[10]; in[10] += in[9];
in[9] += in[8]; in[8] += in[7]; in[7] += in[6]; in[6] += in[5];
in[5] += in[4]; in[4] += in[3]; in[3] += in[2]; in[2] += in[1];
in[1] += in[0];
// 18 point IDCT for odd indices
// input aliasing for 18 point IDCT
in[17] += in[15]; in[15] += in[13]; in[13] += in[11]; in[11] += in[9];
in[9] += in[7]; in[7] += in[5]; in[5] += in[3]; in[3] += in[1];
// Fast 9 Point Inverse Discrete Cosine Transform
//
// By Francois-Raymond Boyer
// mailto:boyerf@iro.umontreal.ca
// http://www.iro.umontreal.ca/~boyerf
//
// The code has been optimized for Intel processors
// (takes a lot of time to convert float to and from iternal FPU representation)
//
// It is a simple "factorization" of the IDCT matrix.
// 9 point IDCT on even indices
// 5 points on odd indices (not realy an IDCT)
float i00 = in[0] + in[0];
float iip12 = i00 + in[12];
float tmp0 = iip12 + in[4] * 1.8793852415718f + in[8] * 1.532088886238f + in[16] * 0.34729635533386f;
float tmp1 = i00 + in[4] - in[8] - in[12] - in[12] - in[16];
float tmp2 = iip12 - in[4] * 0.34729635533386f - in[8] * 1.8793852415718f + in[16] * 1.532088886238f;
float tmp3 = iip12 - in[4] * 1.532088886238f + in[8] * 0.34729635533386f - in[16] * 1.8793852415718f;
float tmp4 = in[0] - in[4] + in[8] - in[12] + in[16];
// 4 points on even indices
float i66_ = in[6] * 1.732050808f; // Sqrt[3]
float tmp0_ = in[2] * 1.9696155060244f + i66_ + in[10] * 1.2855752193731f + in[14] * 0.68404028665134f;
float tmp1_ = (in[2] - in[10] - in[14]) * 1.732050808f;
float tmp2_ = in[2] * 1.2855752193731f - i66_ - in[10] * 0.68404028665134f + in[14] * 1.9696155060244f;
float tmp3_ = in[2] * 0.68404028665134f - i66_ + in[10] * 1.9696155060244f - in[14] * 1.2855752193731f;
// 9 point IDCT on odd indices
// 5 points on odd indices (not realy an IDCT)
float i0 = in[1] + in[1];
float i0p12 = i0 + in[13];
float tmp0o = i0p12 + in[5] * 1.8793852415718f + in[9] * 1.532088886238f + in[17] * 0.34729635533386f;
float tmp1o = i0 + in[5] - in[9] - in[13] - in[13] - in[17];
float tmp2o = i0p12 - in[5] * 0.34729635533386f - in[9] * 1.8793852415718f + in[17] * 1.532088886238f;
float tmp3o = i0p12 - in[5] * 1.532088886238f + in[9] * 0.34729635533386f - in[17] * 1.8793852415718f;
float tmp4o = (in[1] - in[5] + in[9] - in[13] + in[17]) * 0.707106781f; // Twiddled
// 4 points on even indices
float i6_ = in[7] * 1.732050808f; // Sqrt[3]
float tmp0_o = in[3] * 1.9696155060244f + i6_ + in[11] * 1.2855752193731f + in[15] * 0.68404028665134f;
float tmp1_o = (in[3] - in[11] - in[15]) * 1.732050808f;
float tmp2_o = in[3] * 1.2855752193731f - i6_ - in[11] * 0.68404028665134f + in[15] * 1.9696155060244f;
float tmp3_o = in[3] * 0.68404028665134f - i6_ + in[11] * 1.9696155060244f - in[15] * 1.2855752193731f;
// Twiddle factors on odd indices
// and
// Butterflies on 9 point IDCT's
// and
// twiddle factors for 36 point IDCT
float e = tmp0 + tmp0_; float o = (tmp0o + tmp0_o) * 0.501909918f; float tmpf_0 = e + o; float tmpf_17 = e - o; e = tmp1 + tmp1_;
o = (tmp1o + tmp1_o) * 0.517638090f; float tmpf_1 = e + o; float tmpf_16 = e - o;e = tmp2 + tmp2_; o = (tmp2o + tmp2_o) * 0.551688959f;
float tmpf_2 = e + o; float tmpf_15 = e - o; e = tmp3 + tmp3_; o = (tmp3o + tmp3_o) * 0.610387294f; float tmpf_3 = e + o; float tmpf_14 = e - o;
float tmpf_4 = tmp4 + tmp4o; float tmpf_13 = tmp4 - tmp4o; e = tmp3 - tmp3_; o = (tmp3o - tmp3_o) * 0.871723397f;
float tmpf_5 = e + o; float tmpf_12 = e - o; e = tmp2 - tmp2_; o = (tmp2o - tmp2_o) * 1.183100792f; float tmpf_6 = e + o;
float tmpf_11 = e - o; e = tmp1 - tmp1_; o = (tmp1o - tmp1_o) * 1.931851653f; float tmpf_7 = e + o; float tmpf_10 = e - o;
e = tmp0 - tmp0_; o = (tmp0o - tmp0_o) * 5.736856623f; float tmpf_8 = e + o; float tmpf_9 = e - o;
// end 36 point IDCT
// shift to modified IDCT
float[] win_bt = win[block_type];
out[0] = -tmpf_9 * win_bt[0];
out[1] = -tmpf_10 * win_bt[1];
out[2] = -tmpf_11 * win_bt[2];
out[3] = -tmpf_12 * win_bt[3];
out[4] = -tmpf_13 * win_bt[4];
out[5] = -tmpf_14 * win_bt[5];
out[6] = -tmpf_15 * win_bt[6];
out[7] = -tmpf_16 * win_bt[7];
out[8] = -tmpf_17 * win_bt[8];
out[9] = tmpf_17 * win_bt[9];
out[10] = tmpf_16 * win_bt[10];
out[11] = tmpf_15 * win_bt[11];
out[12] = tmpf_14 * win_bt[12];
out[13] = tmpf_13 * win_bt[13];
out[14] = tmpf_12 * win_bt[14];
out[15] = tmpf_11 * win_bt[15];
out[16] = tmpf_10 * win_bt[16];
out[17] = tmpf_9 * win_bt[17];
out[18] = tmpf_8 * win_bt[18];
out[19] = tmpf_7 * win_bt[19];
out[20] = tmpf_6 * win_bt[20];
out[21] = tmpf_5 * win_bt[21];
out[22] = tmpf_4 * win_bt[22];
out[23] = tmpf_3 * win_bt[23];
out[24] = tmpf_2 * win_bt[24];
out[25] = tmpf_1 * win_bt[25];
out[26] = tmpf_0 * win_bt[26];
out[27] = tmpf_0 * win_bt[27];
out[28] = tmpf_1 * win_bt[28];
out[29] = tmpf_2 * win_bt[29];
out[30] = tmpf_3 * win_bt[30];
out[31] = tmpf_4 * win_bt[31];
out[32] = tmpf_5 * win_bt[32];
out[33] = tmpf_6 * win_bt[33];
out[34] = tmpf_7 * win_bt[34];
out[35] = tmpf_8 * win_bt[35];
}
}
/**
* Reads the side info from the stream,assuming the entire. frame has been
* read already. Mono : 136 bits (= 17 bytes) Stereo : 256 bits (= 32
* bytes)
*
*@return Description of the Returned Value
*/
private final boolean get_side_info() {
int ch;
int gr;
if (header.version() == Header.MPEG1) {
si.main_data_begin = stream.readbits(9);
if (channels == 1) {
si.private_bits = stream.readbits(5);
} else {
si.private_bits = stream.readbits(3);
}
for (ch = 0; ch < channels; ch++) {
LayerIIIDecoder.Channel t = si.ch[ch];
t.scfsi[0] = stream.readbits(1);
t.scfsi[1] = stream.readbits(1);
t.scfsi[2] = stream.readbits(1);
t.scfsi[3] = stream.readbits(1);
}
for (gr = 0; gr < 2; gr++) {
for (ch = 0; ch < channels; ch++) {
LayerIIIDecoder.GRInfo s = si.ch[ch].gr[gr];
s.part2_3_length = stream.readbits(12);
s.big_values = stream.readbits(9);
s.global_gain = stream.readbits(8);
s.scalefac_compress = stream.readbits(4);
s.window_switching_flag = stream.readbits(1);
if ((s.window_switching_flag) != 0) {
s.block_type = stream.readbits(2);
s.mixed_block_flag = stream.readbits(1);
s.table_select[0] = stream.readbits(5);
s.table_select[1] = stream.readbits(5);
s.subblock_gain[0] = stream.readbits(3);
s.subblock_gain[1] = stream.readbits(3);
s.subblock_gain[2] = stream.readbits(3);
// Set region_count parameters since they are implicit in this case.
if (s.block_type == 0) {
// Side info bad: block_type == 0 in split block
return false;
} else if (s.block_type == 2 && s.mixed_block_flag == 0) {
s.region0_count = 8;
} else {
s.region0_count = 7;
}
s.region1_count = 20 - s.region0_count;
} else {
s.table_select[0] = stream.readbits(5);
s.table_select[1] = stream.readbits(5);
s.table_select[2] = stream.readbits(5);
s.region0_count = stream.readbits(4);
s.region1_count = stream.readbits(3);
s.block_type = 0;
}
s.preflag = stream.readbits(1);
s.scalefac_scale = stream.readbits(1);
s.count1table_select = stream.readbits(1);
}
}
} else {
//unused currently
// MPEG-2 LSF
si.main_data_begin = stream.readbits(8);
if (channels == 1) {
si.private_bits = stream.readbits(1);
} else {
si.private_bits = stream.readbits(2);
}
for (ch = 0; ch < channels; ch++) {
LayerIIIDecoder.GRInfo s = si.ch[ch].gr[0];
s.part2_3_length = stream.readbits(12);
s.big_values = stream.readbits(9);
s.global_gain = stream.readbits(8);
s.scalefac_compress = stream.readbits(9);
s.window_switching_flag = stream.readbits(1);
if ((s.window_switching_flag) != 0) {
s.block_type = stream.readbits(2);
s.mixed_block_flag = stream.readbits(1);
s.table_select[0] = stream.readbits(5);
s.table_select[1] = stream.readbits(5);
s.subblock_gain[0] = stream.readbits(3);
s.subblock_gain[1] = stream.readbits(3);
s.subblock_gain[2] = stream.readbits(3);
// Set region_count parameters since they are implicit in this case.
if (s.block_type == 0) {
// Side info bad: block_type == 0 in split block
return false;
} else if (s.block_type == 2 && s.mixed_block_flag == 0) {
s.region0_count = 8;
} else {
s.region0_count = 7;
s.region1_count = 20 - s.region0_count;
}
} else {
s.table_select[0] = stream.readbits(5);
s.table_select[1] = stream.readbits(5);
s.table_select[2] = stream.readbits(5);
s.region0_count = stream.readbits(4);
s.region1_count = stream.readbits(3);
s.block_type = 0;
}
s.scalefac_scale = stream.readbits(1);
s.count1table_select = stream.readbits(1);
}
}
return true;
}
private final void get_scale_factors(final int ch,final int gr) {
GRInfo gr_info = (si.ch[ch].gr[gr]);
int scale_comp = gr_info.scalefac_compress;
int length0 = slen0[scale_comp];
int length1 = slen1[scale_comp];
int l[] = null;
int s[][] = null;
if(ch==0){
l = scalefac0L;
s = scalefac0S;
}
else{
l = scalefac1L;
s = scalefac1S;
}
if ((gr_info.window_switching_flag != 0) && (gr_info.block_type == 2)) {
if ((gr_info.mixed_block_flag) != 0) {
// MIXED
for (int sfb = 0; sfb < 8; sfb++) {
l[sfb] = br.hgetbits(slen0[gr_info.scalefac_compress]);
}
for (int sfb = 3; sfb < 6; sfb++) {
for (int window = 0; window < 3; window++) {
s[window][sfb] = br.hgetbits(slen0[gr_info.scalefac_compress]);
}
}
for (int sfb = 6; sfb < 12; sfb++) {
for (int window = 0; window < 3; window++) {
s[window][sfb] = br.hgetbits(slen1[gr_info.scalefac_compress]);
}
}
for (int sfb = 12,window = 0; window < 3; window++) {
s[window][sfb] = 0;
}
}
else {
// SHORT
s[0][0] = br.hgetbits(length0);
s[1][0] = br.hgetbits(length0);
s[2][0] = br.hgetbits(length0);
s[0][1] = br.hgetbits(length0);
s[1][1] = br.hgetbits(length0);
s[2][1] = br.hgetbits(length0);
s[0][2] = br.hgetbits(length0);
s[1][2] = br.hgetbits(length0);
s[2][2] = br.hgetbits(length0);
s[0][3] = br.hgetbits(length0);
s[1][3] = br.hgetbits(length0);
s[2][3] = br.hgetbits(length0);
s[0][4] = br.hgetbits(length0);
s[1][4] = br.hgetbits(length0);
s[2][4] = br.hgetbits(length0);
s[0][5] = br.hgetbits(length0);
s[1][5] = br.hgetbits(length0);
s[2][5] = br.hgetbits(length0);
s[0][6] = br.hgetbits(length1);
s[1][6] = br.hgetbits(length1);
s[2][6] = br.hgetbits(length1);
s[0][7] = br.hgetbits(length1);
s[1][7] = br.hgetbits(length1);
s[2][7] = br.hgetbits(length1);
s[0][8] = br.hgetbits(length1);
s[1][8] = br.hgetbits(length1);
s[2][8] = br.hgetbits(length1);
s[0][9] = br.hgetbits(length1);
s[1][9] = br.hgetbits(length1);
s[2][9] = br.hgetbits(length1);
s[0][10] = br.hgetbits(length1);
s[1][10] = br.hgetbits(length1);
s[2][10] = br.hgetbits(length1);
s[0][11] = br.hgetbits(length1);
s[1][11] = br.hgetbits(length1);
s[2][11] = br.hgetbits(length1);
s[0][12] = s[1][12] = s[2][12] = 0;
}
// SHORT
} else {
// LONG types 0,1,3
int si_t[] = si.ch[ch].scfsi;
if (gr == 0) {
l[0] = br.hgetbits(length0);
l[1] = br.hgetbits(length0);
l[2] = br.hgetbits(length0);
l[3] = br.hgetbits(length0);
l[4] = br.hgetbits(length0);
l[5] = br.hgetbits(length0);
l[6] = br.hgetbits(length0);
l[7] = br.hgetbits(length0);
l[8] = br.hgetbits(length0);
l[9] = br.hgetbits(length0);
l[10] = br.hgetbits(length0);
l[11] = br.hgetbits(length1);
l[12] = br.hgetbits(length1);
l[13] = br.hgetbits(length1);
l[14] = br.hgetbits(length1);
l[15] = br.hgetbits(length1);
l[16] = br.hgetbits(length1);
l[17] = br.hgetbits(length1);
l[18] = br.hgetbits(length1);
l[19] = br.hgetbits(length1);
l[20] = br.hgetbits(length1);
}
else{
if (si_t[0] == 0) {
l[0] = br.hgetbits(length0);
l[1] = br.hgetbits(length0);
l[2] = br.hgetbits(length0);
l[3] = br.hgetbits(length0);
l[4] = br.hgetbits(length0);
l[5] = br.hgetbits(length0);
}
if (si_t[1] == 0) {
l[6] = br.hgetbits(length0);
l[7] = br.hgetbits(length0);
l[8] = br.hgetbits(length0);
l[9] = br.hgetbits(length0);
l[10] = br.hgetbits(length0);
}
if (si_t[2] == 0) {
l[11] = br.hgetbits(length1);
l[12] = br.hgetbits(length1);
l[13] = br.hgetbits(length1);
l[14] = br.hgetbits(length1);
l[15] = br.hgetbits(length1);
}
if (si_t[3] == 0) {
l[16] = br.hgetbits(length1);
l[17] = br.hgetbits(length1);
l[18] = br.hgetbits(length1);
l[19] = br.hgetbits(length1);
l[20] = br.hgetbits(length1);
}
}
l[21] = l[22] = 0;
}
}
private final void huffman_decode(final int ch,final int gr) {
//huff.x = huff.y = huff.v = huff.w= 0;
GRInfo s = si.ch[ch].gr[gr];
int part2_3_end = part2_start + s.part2_3_length;
int num_bits=0;
int region1Start=0;
int region2Start=0;
int index;
int buf;
int buf1;
// Find region boundary for short block case
if (((s.window_switching_flag) != 0) && (s.block_type == 2)) {
// Region2.
region1Start = 36;
// sfb[9/3]*3=36
region2Start = 576;
// No Region2 for short block case
} else {
// Find region boundary for long block case
buf = s.region0_count + 1;
buf1 = buf + s.region1_count + 1;
if (buf1 > sfBandIndexL.length - 1) {
buf1 = sfBandIndexL.length - 1;
}
region1Start = sfBandIndexL[buf];
region2Start = sfBandIndexL[buf1];
}
index = 0;
// Read bigvalues area
int big_val_max,is_1d_max;
big_val_max = s.big_values << 1;
is_1d_max = is_1d.length;
// for (int i = 0; (i < (s.big_values << 1)) && (i part2_3_end) {
br.rewindNbits(num_bits - part2_3_end);
index -= 4;
}
num_bits = BitReserve.totbit;
// Dismiss stuffing bits
if (num_bits < part2_3_end) {
br.hgetbits(part2_3_end - num_bits);
}
// Zero out rest
if (index < 576) {
if(ch==0)
nonzero0 = index;
else
nonzero1 = index;
} else {
if(ch==0)
nonzero0 = 576;
else
nonzero1 = 576;
}
if (index < 0) {
index = 0;
}
}
private final void dequantize_sample(final float xr[][],final int ch,final int gr) {
GRInfo gr_info = (si.ch[ch].gr[gr]);
int cb = 0;
int next_cb_boundary =0;
int cb_begin = 0;
int cb_width = 0;
float g_gain = 0.0f;
// choose correct scalefactor band per block type,initalize boundary
if ((gr_info.window_switching_flag != 0) && (gr_info.block_type == 2)) {
if (gr_info.mixed_block_flag != 0) {
next_cb_boundary = sfBandIndexL[1];
}
// LONG blocks: 0,1,3
else {
cb_width = sfBandIndexS[1];
next_cb_boundary = (cb_width << 2) - cb_width;
cb_begin = 0;
}
} else {
next_cb_boundary = sfBandIndexL[1];
// LONG blocks: 0,1,3
}
// Compute overall (global) scaling.
g_gain = (float)pow((int)2.0,(int)(0.25 * (gr_info.global_gain - 210.0)));
int maxNonZero = (ch == 0) ? nonzero0 : nonzero1;
for (int j = 0; j < maxNonZero; j++) {
reste = j % SSLIMIT;
quotien = (int) ((j - reste) / SSLIMIT);
if (is_1d[j] == 0) {
xr[quotien][reste] = 0.0f;
}
else {
int abv = is_1d[j];
if (is_1d[j] > 0) {
xr[quotien][reste] = g_gain * t_43[abv];
}
else {
xr[quotien][reste] = -g_gain * t_43[-abv];
}
}
}
// apply formula per block type
for (int i=0,j = 0; j < maxNonZero; j++,i++) {
reste = j % SSLIMIT;
quotien = (int) ((j - reste) / SSLIMIT);
if (i == next_cb_boundary) {
/*
* Adjust critical band boundary
*/
if ((gr_info.window_switching_flag != 0) && (gr_info.block_type == 2)) {
if (gr_info.mixed_block_flag != 0) {
if (i == sfBandIndexL[8]) {
next_cb_boundary = sfBandIndexS[4];
next_cb_boundary = (next_cb_boundary << 2) - next_cb_boundary;
cb = 3;
cb_width = sfBandIndexS[4] - sfBandIndexS[3];
cb_begin = sfBandIndexS[3];
cb_begin = (cb_begin << 2) - cb_begin;
} else if (i < sfBandIndexL[8]) {
next_cb_boundary = sfBandIndexL[(++cb) + 1];
} else {
next_cb_boundary = sfBandIndexS[(++cb) + 1];
next_cb_boundary = (next_cb_boundary << 2) - next_cb_boundary;
cb_begin = sfBandIndexS[cb];
cb_width = sfBandIndexS[cb + 1] - cb_begin;
cb_begin = (cb_begin << 2) - cb_begin;
}
} else {
next_cb_boundary = sfBandIndexS[(++cb) + 1];
next_cb_boundary = (next_cb_boundary << 2) - next_cb_boundary;
cb_begin = sfBandIndexS[cb];
cb_width = sfBandIndexS[cb + 1] - cb_begin;
cb_begin = (cb_begin << 2) - cb_begin;
}
} else {
// long blocks
next_cb_boundary = sfBandIndexL[(++cb) + 1];
}
}
int s[][] = (ch==0)?scalefac0S:scalefac1S;
int l[] = (ch==0)?scalefac0L:scalefac1L;
// Do long/short dependent scaling operations
if ((gr_info.window_switching_flag != 0) && (((gr_info.block_type == 2) && (gr_info.mixed_block_flag == 0)) || ((gr_info.block_type == 2) && (gr_info.mixed_block_flag != 0) && (j >= 36)))) {
int t_index = (i - cb_begin) / cb_width;
int idx = s[t_index][cb] << gr_info.scalefac_scale;
idx += (gr_info.subblock_gain[t_index] << 2);
xr[quotien][reste] *= two_to_negative_half_pow[idx];
} else {
// LONG block types 0,1,3 & 1st 2 subbands of switched blocks
int idx = l[cb];
if (gr_info.preflag != 0) {
idx += pretab[cb];
}
idx = idx << gr_info.scalefac_scale;
xr[quotien][reste] *= two_to_negative_half_pow[idx];
}
}
int reste;
int quotien;
for(int j = maxNonZero; j < 576; j++) {
reste = j % SSLIMIT;
quotien = (int) ((j - reste) / SSLIMIT);
xr[quotien][reste] = 0.0f;
}
}
static int freq,freq3,src_line,des_line,sfb_start,sfb_start3,sfb_lines,reste,quotien;
private final void reorder(final float xr[][],final int ch,final int gr) {
GRInfo gr_info = (si.ch[ch].gr[gr]);
if ((gr_info.window_switching_flag != 0) && (gr_info.block_type == 2)) {
if (gr_info.mixed_block_flag != 0) {
// NO REORDER FOR LOW 2 SUBBANDS
for(int i = 36; --i >= 0;){//i = 0; i < 36; i++) {
reste = i % SSLIMIT;
quotien = (int) ((i - reste) / SSLIMIT);
out_1d[i] = xr[quotien][reste];
}
// REORDERING FOR REST SWITCHED SHORT
for (int sfb = 3,sfb_start = sfBandIndexS[3],sfb_lines = sfBandIndexS[4] - sfb_start; sfb < 13;
sfb++,sfb_start = sfBandIndexS[sfb],sfb_lines = sfBandIndexS[sfb + 1] - sfb_start) {
sfb_start3 = (sfb_start << 2) - sfb_start;
for (freq = 0,freq3 = 0; freq < sfb_lines; freq++,freq3 += 3) {
src_line = sfb_start3 + freq;
des_line = sfb_start3 + freq3;
reste = src_line % SSLIMIT;
quotien = (int) ((src_line - reste) / SSLIMIT);
out_1d[des_line] = xr[quotien][reste];
src_line += sfb_lines;
des_line++;
reste = src_line % SSLIMIT;
quotien = (int) ((src_line - reste) / SSLIMIT);
out_1d[des_line] = xr[quotien][reste];
src_line += sfb_lines;
des_line++;
reste = src_line % SSLIMIT;
quotien = (int) ((src_line - reste) / SSLIMIT);
out_1d[des_line] = xr[quotien][reste];
}
}
} else {
// pure short
int reorder[] = reorder_table[sfreq];
for(int i = 576; --i >= 0;){//while(i < 576){
int j = reorder[i];
reste = j % SSLIMIT;
quotien = (int) ((j - reste) / SSLIMIT);
out_1d[i] = xr[quotien][reste];
}
}
}
else {
// long blocks
for(int i = 576; --i >= 0;){
reste = i % SSLIMIT;
quotien = (int) ((i - reste) / SSLIMIT);
out_1d[i] = xr[quotien][reste];
}
}
}
private final void stereo(final int gr) {
if (channels == 2) {
//System.out.println("channels 3");
for(int sb = SBLIMIT; --sb >= 0;) {
float l[] = lr[0][sb];
float r[] = ro[0][sb];
for (int ss = 0; ss < SSLIMIT; ss+=3) {
l[ss] = r[ss];
l[ss + 1] = r[ss + 1];
l[ss + 2] = r[ss + 2];
}
}
}
else {
System.out.println("channels 3" + channels);
GRInfo gr_info = (si.ch[0].gr[gr]);
int mode_ext = header.mode_extension();
// boolean ms_stereo = ((header.mode() == Header.JOINT_STEREO) && ((mode_ext & 0x2) != 0));
boolean i_stereo = ((header.mode() == Header.JOINT_STEREO) && ((mode_ext & 0x1) != 0));
//boolean lsf = ((header.version() == Header.MPEG2_LSF));
int io_type = (gr_info.scalefac_compress & 1);
// initialization
/*
for (i = 0; i < 576;) {
is_pos[i] = 7;
is_ratio[i++] = 0.0f;
is_pos[i] = 7;
is_ratio[i++] = 0.0f;
is_pos[i] = 7;
is_ratio[i++] = 0.0f;
is_pos[i] = 7;
is_ratio[i++] = 0.0f;
}
*/
for (int ii = 0; ii < is_pos.length;ii++) {
is_pos[ii]=7;
}
//Arrays.fill(is_pos,7);
//Arrays.fill(is_ratio,0);
if (i_stereo) {
if ((gr_info.window_switching_flag != 0) && (gr_info.block_type == 2)) {
if (gr_info.mixed_block_flag != 0) {
int max_sfb = 0;
for (int j = 0; j < 3; j++) {
int sfbcnt;
sfbcnt = 2;
for (int sfb = 12; sfb >= 3; sfb--) {
int i = sfBandIndexS[sfb];
int lines = sfBandIndexS[sfb + 1] - i;
i = (i << 2) - i + (j + 1) * lines - 1;
while (lines > 0) {
if (ro[1][i / 18][i % 18] != 0.0f) {
sfbcnt = sfb;
sfb = -10;
lines = -10;
}
lines--;
i--;
}
}
int sfb = sfbcnt + 1;
if (sfb > max_sfb) {
max_sfb = sfb;
}
int stemp[][] = scalefac1S;
while (sfb < 12) {
int temp = sfBandIndexS[sfb];
int sb = sfBandIndexS[sfb + 1] - temp;
int i = (temp << 2) - temp + j * sb;
for (; sb > 0; sb--) {
is_pos[i] = stemp[j][sfb];
if (is_pos[i] != 7) {
//if (lsf) {
// i_stereo_k_values(is_pos[i],io_type,i);
//}
//else {
is_ratio[i] = TAN12[is_pos[i]];
//}
}
i++;
}
sfb++;
}
sfb = sfBandIndexS[10];
int sb = sfBandIndexS[11] - sfb;
sfb = (sfb << 2) - sfb + j * sb;
int temp = sfBandIndexS[11];
sb = sfBandIndexS[12] - temp;
int i = (temp << 2) - temp + j * sb;
for (; sb > 0; sb--) {
is_pos[i] = is_pos[sfb];
//if (lsf) {
// k[0][i] = k[0][sfb];
// k[1][i] = k[1][sfb];
//} else {
is_ratio[i] = is_ratio[sfb];
//}
i++;
}
}
if (max_sfb <= 3) {
int i = 2;
int ss = 17;
int sb = -1;
while (i >= 0) {
if (ro[1][i][ss] != 0.0f) {
sb = (i << 4) + (i << 1) + ss;
i = -1;
} else {
ss--;
if (ss < 0) {
i--;
ss = 17;
}
}
}
i = 0;
while (sfBandIndexL[i] <= sb) {
i++;
}
int sfb = i;
i = sfBandIndexL[i];
int[] l = scalefac1L;
for (; sfb < 8; sfb++) {
sb = sfBandIndexL[sfb + 1] - sfBandIndexL[sfb];
for (; sb > 0; sb--) {
is_pos[i] = l[sfb];
if (is_pos[i] != 7) {
//if (lsf) {
// i_stereo_k_values(is_pos[i],io_type,i);
// } else {
is_ratio[i] = TAN12[is_pos[i]];
// }
}
i++;
}
}
}
} else {
for (int j = 0; j < 3; j++) {
int sfbcnt;
sfbcnt = -1;
for (int sfb = 12; sfb >= 0; sfb--) {
int temp = sfBandIndexS[sfb];
int lines = sfBandIndexS[sfb + 1] - temp;
int i = (temp << 2) - temp + (j + 1) * lines - 1;
while (lines > 0) {
if (ro[1][i / 18][i % 18] != 0.0f) {
sfbcnt = sfb;
sfb = -10;
lines = -10;
}
lines--;
i--;
}
}
int sfb = sfbcnt + 1;
while (sfb < 12) {
int temp = sfBandIndexS[sfb];
int sb = sfBandIndexS[sfb + 1] - temp;
int i = (temp << 2) - temp + j * sb;
for (; sb > 0; sb--) {
is_pos[i] = scalefac1S[j][sfb];
if (is_pos[i] != 7) {
//if (lsf) {
// i_stereo_k_values(is_pos[i],io_type,i);
//} else {
is_ratio[i] = TAN12[is_pos[i]];
//}
}
i++;
}
sfb++;
}
int temp = sfBandIndexS[10];
int temp2 = sfBandIndexS[11];
int sb = temp2 - temp;
sfb = (temp << 2) - temp + j * sb;
sb = sfBandIndexS[12] - temp2;
int i = (temp2 << 2) - temp2 + j * sb;
float k0 = k[0][sfb];
float k1 = k[1][sfb];
for (; sb > 0; sb--) {
is_pos[i] = is_pos[sfb];
//if (lsf) {
// k[0][i] = k0;
// k[1][i] = k1;
//} else {
is_ratio[i] = is_ratio[sfb];
//}
i++;
}
}
}
} else {
int i = 31;
int ss = 17;
int sb = 0;
while (i >= 0) {
if (ro[1][i][ss] != 0.0f) {
sb = (i << 4) + (i << 1) + ss;
i = -1;
} else {
ss--;
if (ss < 0) {
i--;
ss = 17;
}
}
}
i = 0;
while (sfBandIndexL[i] <= sb) {
i++;
}
int sfb = i;
i = sfBandIndexL[i];
for (; sfb < 21; sfb++) {
sb = sfBandIndexL[sfb + 1] - sfBandIndexL[sfb];
for (; sb > 0; sb--) {
int is_pos_t = scalefac1L[sfb];
is_pos[i] = is_pos_t;
if (is_pos_t != 7) {
//if (lsf) {
// i_stereo_k_values(is_pos_t,io_type,i);
//} else {
is_ratio[i] = TAN12[is_pos_t];
//}
}
i++;
}
}
sfb = sfBandIndexL[20];
for (sb = 576 - sfBandIndexL[21]; (sb > 0) && (i < 576); sb--,i++) {
is_pos[i] = is_pos[sfb];
// error here : i >=576
//if (lsf) {
// k[0][i] = k[0][sfb];
// k[1][i] = k[1][sfb];
//}/ else {
is_ratio[i] = is_ratio[sfb];
//}
}
}
}
int i = 0;
for (int sb = 0; sb < SBLIMIT; sb++) {
float []lr0 = lr[0][sb];
float []lr1 = lr[1][sb];
float []ro0 = ro[0][sb];
float []ro1 = ro[1][sb];
for (int ss = 0; ss < SSLIMIT; ss++,i++) {
if (is_pos[i] == 7) {
if ((header.mode() == Header.JOINT_STEREO) && ((mode_ext & 0x2) != 0)){//(ms_stereo) {
lr0[ss] = (ro0[ss] + ro1[ss]) * 0.707106781f;
lr1[ss] = (ro0[ss] - ro1[ss]) * 0.707106781f;
} else {
lr0[ss] = ro0[ss];
lr1[ss] = ro1[ss];
}
}
else if (i_stereo) {
//if (lsf) {
// lr0[ss] = ro0[ss] * k[0][i];
// lr1[ss] = ro0[ss] * k[1][i];
//} else {
lr1[ss] = ro0[ss] / (float) (1 + is_ratio[i]);
lr0[ss] = lr1[ss] * is_ratio[i];
//}
}
}
}
}
}
private final static float cs[] =
{
0.857492925712f,0.881741997318f,0.949628649103f,0.983314592492f,
0.995517816065f,0.999160558175f,0.999899195243f,0.999993155067f
};
private final static float ca[] =
{
-0.5144957554270f,-0.4717319685650f,-0.3133774542040f,-0.1819131996110f,
-0.0945741925262f,-0.0409655828852f,-0.0141985685725f,-0.00369997467375f
};
private final void antialias(final int ch,final int gr) {
GRInfo gr_info = (si.ch[ch].gr[gr]);
int sb18lim = 0;
if ((gr_info.window_switching_flag != 0) && (gr_info.block_type == 2) && (gr_info.mixed_block_flag == 0)) {
return;
}
if ((gr_info.window_switching_flag != 0) && (gr_info.mixed_block_flag != 0) && (gr_info.block_type == 2)) {
sb18lim = 18;
}
else {
sb18lim = 558;
}
for (int sb18 = 0; sb18 < sb18lim; sb18 += 18) {
int src_idx1 = sb18 + 17;
int src_idx2 = sb18 + 18;
float bu = out_1d[src_idx1];
float bd = out_1d[src_idx2];
float cst = cs[0];
float cat = ca[0];
out_1d[src_idx1--] = (bu * cst) - (bd * cat);
out_1d[src_idx2++] = (bd * cst) + (bu * cat);
bu = out_1d[src_idx1];
bd = out_1d[src_idx2];
cst = cs[1];
cat = ca[1];
out_1d[src_idx1--] = (bu * cst) - (bd * cat);
out_1d[src_idx2++] = (bd * cst) + (bu * cat);
bu = out_1d[src_idx1];
bd = out_1d[src_idx2];
cst = cs[2];
cat = ca[2];
out_1d[src_idx1--] = (bu * cst) - (bd * cat);
out_1d[src_idx2++] = (bd * cst) + (bu * cat);
bu = out_1d[src_idx1];
bd = out_1d[src_idx2];
cst = cs[3];
cat = ca[3];
out_1d[src_idx1--] = (bu * cst) - (bd * cat);
out_1d[src_idx2++] = (bd * cst) + (bu * cat);
bu = out_1d[src_idx1];
bd = out_1d[src_idx2];
cst = cs[4];
cat = ca[4];
out_1d[src_idx1--] = (bu * cst) - (bd * cat);
out_1d[src_idx2++] = (bd * cst) + (bu * cat);
bu = out_1d[src_idx1];
bd = out_1d[src_idx2];
cst = cs[5];
cat = ca[5];
out_1d[src_idx1--] = (bu * cst) - (bd * cat);
out_1d[src_idx2++] = (bd * cst) + (bu * cat);
bu = out_1d[src_idx1];
bd = out_1d[src_idx2];
cst = cs[6];
cat = ca[6];
out_1d[src_idx1--] = (bu * cst) - (bd * cat);
out_1d[src_idx2++] = (bd * cst) + (bu * cat);
bu = out_1d[src_idx1];
bd = out_1d[src_idx2];
cst = cs[7];
cat = ca[7];
out_1d[src_idx1] = (bu * cst) - (bd * cat);
out_1d[src_idx2] = (bd * cst) + (bu * cat);
}
}
private final void hybrid(final int ch,final int gr) {
GRInfo gr_info = (si.ch[ch].gr[gr]);
for (int sb18 = 0; sb18 < 576; sb18 += 18) {
int bt = ((gr_info.window_switching_flag != 0) && (gr_info.mixed_block_flag != 0) && (sb18 < 36)) ? 0 : gr_info.block_type;
for (int cc = 0; cc < 18; cc++) {
tsOutCopy[cc] = out_1d[cc + sb18];
}
invMDCT(tsOutCopy,rawout,bt);
for (int cc = 0; cc < 18; cc++) {
out_1d[cc + sb18] = tsOutCopy[cc];
}
int sbt = sb18;
out_1d[sbt] = rawout[0] + prevblck[ch][sbt];
prevblck[ch][sbt++] = rawout[18];
out_1d[sbt] = rawout[1] + prevblck[ch][sbt];
prevblck[ch][sbt++] = rawout[19];
out_1d[sbt] = rawout[2] + prevblck[ch][sbt];
prevblck[ch][sbt++] = rawout[20];
out_1d[sbt] = rawout[3] + prevblck[ch][sbt];
prevblck[ch][sbt++] = rawout[21];
out_1d[sbt] = rawout[4] + prevblck[ch][sbt];
prevblck[ch][sbt++] = rawout[22];
out_1d[sbt] = rawout[5] + prevblck[ch][sbt];
prevblck[ch][sbt++] = rawout[23];
out_1d[sbt] = rawout[6] + prevblck[ch][sbt];
prevblck[ch][sbt++] = rawout[24];
out_1d[sbt] = rawout[7] + prevblck[ch][sbt];
prevblck[ch][sbt++] = rawout[25];
out_1d[sbt] = rawout[8] + prevblck[ch][sbt];
prevblck[ch][sbt++] = rawout[26];
out_1d[sbt] = rawout[9] + prevblck[ch][sbt];
prevblck[ch][sbt++] = rawout[27];
out_1d[sbt] = rawout[10] + prevblck[ch][sbt];
prevblck[ch][sbt++] = rawout[28];
out_1d[sbt] = rawout[11] + prevblck[ch][sbt];
prevblck[ch][sbt++] = rawout[29];
out_1d[sbt] = rawout[12] + prevblck[ch][sbt];
prevblck[ch][sbt++] = rawout[30];
out_1d[sbt] = rawout[13] + prevblck[ch][sbt];
prevblck[ch][sbt++] = rawout[31];
out_1d[sbt] = rawout[14] + prevblck[ch][sbt];
prevblck[ch][sbt++] = rawout[32];
out_1d[sbt] = rawout[15] + prevblck[ch][sbt];
prevblck[ch][sbt++] = rawout[33];
out_1d[sbt] = rawout[16] + prevblck[ch][sbt];
prevblck[ch][sbt++] = rawout[34];
out_1d[sbt] = rawout[17] + prevblck[ch][sbt];
prevblck[ch][sbt] = rawout[35];
}
}
private static float pow(float x,int y) {
float r=1;
boolean neg=(y<0);
if (neg) y=-y;
for (int xx=1;xx<=y;xx++) {
r=r*x;
}
if (neg) r=1/r;
return r;
}
private static final class GRInfo {
private int part2_3_length;
private int big_values;
private int global_gain;
private int scalefac_compress;
private int window_switching_flag;
private int block_type;
private int mixed_block_flag;
private final int[] table_select = new int[3];
private final int[] subblock_gain = new int[3];
private int region0_count;
private int region1_count;
private int preflag;
private int scalefac_scale;
private int count1table_select;
}
private static final class SideInfo {
private int main_data_begin;
private int private_bits;
private final Channel[] ch= new Channel[2];
public SideInfo() {
ch[0] = new Channel();
ch[1] = new Channel();
}
}
private static final class Channel {
private final int[] scfsi = new int[4];
private final GRInfo[] gr= new GRInfo[2];
public Channel() {
gr[0] = new GRInfo();
gr[1] = new GRInfo();
}
}
}