--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/decoders/mpglib/layer3.c	Thu Feb 21 19:46:09 2002 +0000
@@ -0,0 +1,2010 @@
+/* 
+ * Mpeg Layer-3 audio decoder 
+ * --------------------------
+ * copyright (c) 1995,1996,1997 by Michael Hipp.
+ * All rights reserved. See also 'README'
+ */ 
+
+#include <stdlib.h>
+#include "mpg123_sdlsound.h"
+#include "mpglib_sdlsound.h"
+#include "huffman.h"
+
+extern struct mpstr *gmp;
+
+#define MPEG1
+
+
+static real ispow[8207];
+static real aa_ca[8],aa_cs[8];
+static real COS1[12][6];
+static real win[4][36];
+static real win1[4][36];
+static real gainpow2[256+118+4];
+static real COS9[9];
+static real COS6_1,COS6_2;
+static real tfcos36[9];
+static real tfcos12[3];
+
+struct bandInfoStruct {
+  short longIdx[23];
+  short longDiff[22];
+  short shortIdx[14];
+  short shortDiff[13];
+};
+
+int longLimit[9][23];
+int shortLimit[9][14];
+
+struct bandInfoStruct bandInfo[9] = { 
+
+/* MPEG 1.0 */
+ { {0,4,8,12,16,20,24,30,36,44,52,62,74, 90,110,134,162,196,238,288,342,418,576},
+   {4,4,4,4,4,4,6,6,8, 8,10,12,16,20,24,28,34,42,50,54, 76,158},
+   {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},
+   {4,4,4,4,6,8,10,12,14,18,22,30,56} } ,
+
+ { {0,4,8,12,16,20,24,30,36,42,50,60,72, 88,106,128,156,190,230,276,330,384,576},
+   {4,4,4,4,4,4,6,6,6, 8,10,12,16,18,22,28,34,40,46,54, 54,192},
+   {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},
+   {4,4,4,4,6,6,10,12,14,16,20,26,66} } ,
+
+ { {0,4,8,12,16,20,24,30,36,44,54,66,82,102,126,156,194,240,296,364,448,550,576} ,
+   {4,4,4,4,4,4,6,6,8,10,12,16,20,24,30,38,46,56,68,84,102, 26} ,
+   {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} ,
+   {4,4,4,4,6,8,12,16,20,26,34,42,12} }  ,
+
+/* MPEG 2.0 */
+ { {0,6,12,18,24,30,36,44,54,66,80,96,116,140,168,200,238,284,336,396,464,522,576},
+   {6,6,6,6,6,6,8,10,12,14,16,20,24,28,32,38,46,52,60,68,58,54 } ,
+   {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} ,
+   {4,4,4,6,6,8,10,14,18,26,32,42,18 } } ,
+
+ { {0,6,12,18,24,30,36,44,54,66,80,96,114,136,162,194,232,278,330,394,464,540,576},
+   {6,6,6,6,6,6,8,10,12,14,16,18,22,26,32,38,46,52,64,70,76,36 } ,
+   {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} ,
+   {4,4,4,6,8,10,12,14,18,24,32,44,12 } } ,
+
+ { {0,6,12,18,24,30,36,44,54,66,80,96,116,140,168,200,238,284,336,396,464,522,576},
+   {6,6,6,6,6,6,8,10,12,14,16,20,24,28,32,38,46,52,60,68,58,54 },
+   {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},
+   {4,4,4,6,8,10,12,14,18,24,30,40,18 } } ,
+/* MPEG 2.5 */
+ { {0,6,12,18,24,30,36,44,54,66,80,96,116,140,168,200,238,284,336,396,464,522,576} ,
+   {6,6,6,6,6,6,8,10,12,14,16,20,24,28,32,38,46,52,60,68,58,54},
+   {0,12,24,36,54,78,108,144,186,240,312,402,522,576},
+   {4,4,4,6,8,10,12,14,18,24,30,40,18} },
+ { {0,6,12,18,24,30,36,44,54,66,80,96,116,140,168,200,238,284,336,396,464,522,576} ,
+   {6,6,6,6,6,6,8,10,12,14,16,20,24,28,32,38,46,52,60,68,58,54},
+   {0,12,24,36,54,78,108,144,186,240,312,402,522,576},
+   {4,4,4,6,8,10,12,14,18,24,30,40,18} },
+ { {0,12,24,36,48,60,72,88,108,132,160,192,232,280,336,400,476,566,568,570,572,574,576},
+   {12,12,12,12,12,12,16,20,24,28,32,40,48,56,64,76,90,2,2,2,2,2},
+   {0, 24, 48, 72,108,156,216,288,372,480,486,492,498,576},
+   {8,8,8,12,16,20,24,28,36,2,2,2,26} } ,
+};
+
+static int mapbuf0[9][152];
+static int mapbuf1[9][156];
+static int mapbuf2[9][44];
+static int *map[9][3];
+static int *mapend[9][3];
+
+static unsigned int n_slen2[512]; /* MPEG 2.0 slen for 'normal' mode */
+static unsigned int i_slen2[256]; /* MPEG 2.0 slen for intensity stereo */
+
+static real tan1_1[16],tan2_1[16],tan1_2[16],tan2_2[16];
+static real pow1_1[2][16],pow2_1[2][16],pow1_2[2][16],pow2_2[2][16];
+
+/* 
+ * init tables for layer-3 
+ */
+void init_layer3(int down_sample_sblimit)
+{
+  int i,j,k,l;
+
+  for(i=-256;i<118+4;i++)
+    gainpow2[i+256] = pow((double)2.0,-0.25 * (double) (i+210) );
+
+  for(i=0;i<8207;i++)
+    ispow[i] = pow((double)i,(double)4.0/3.0);
+
+  for (i=0;i<8;i++)
+  {
+    static double Ci[8]={-0.6,-0.535,-0.33,-0.185,-0.095,-0.041,-0.0142,-0.0037};
+    double sq=sqrt(1.0+Ci[i]*Ci[i]);
+    aa_cs[i] = 1.0/sq;
+    aa_ca[i] = Ci[i]/sq;
+  }
+
+  for(i=0;i<18;i++)
+  {
+    win[0][i]    = win[1][i]    = 0.5 * sin( M_PI / 72.0 * (double) (2*(i+0) +1) ) / cos ( M_PI * (double) (2*(i+0) +19) / 72.0 );
+    win[0][i+18] = win[3][i+18] = 0.5 * sin( M_PI / 72.0 * (double) (2*(i+18)+1) ) / cos ( M_PI * (double) (2*(i+18)+19) / 72.0 );
+  }
+  for(i=0;i<6;i++)
+  {
+    win[1][i+18] = 0.5 / cos ( M_PI * (double) (2*(i+18)+19) / 72.0 );
+    win[3][i+12] = 0.5 / cos ( M_PI * (double) (2*(i+12)+19) / 72.0 );
+    win[1][i+24] = 0.5 * sin( M_PI / 24.0 * (double) (2*i+13) ) / cos ( M_PI * (double) (2*(i+24)+19) / 72.0 );
+    win[1][i+30] = win[3][i] = 0.0;
+    win[3][i+6 ] = 0.5 * sin( M_PI / 24.0 * (double) (2*i+1) )  / cos ( M_PI * (double) (2*(i+6 )+19) / 72.0 );
+  }
+
+  for(i=0;i<9;i++)
+    COS9[i] = cos( M_PI / 18.0 * (double) i);
+
+  for(i=0;i<9;i++)
+    tfcos36[i] = 0.5 / cos ( M_PI * (double) (i*2+1) / 36.0 );
+  for(i=0;i<3;i++)
+    tfcos12[i] = 0.5 / cos ( M_PI * (double) (i*2+1) / 12.0 );
+
+  COS6_1 = cos( M_PI / 6.0 * (double) 1);
+  COS6_2 = cos( M_PI / 6.0 * (double) 2);
+
+  for(i=0;i<12;i++)
+  {
+    win[2][i]  = 0.5 * sin( M_PI / 24.0 * (double) (2*i+1) ) / cos ( M_PI * (double) (2*i+7) / 24.0 );
+    for(j=0;j<6;j++)
+      COS1[i][j] = cos( M_PI / 24.0 * (double) ((2*i+7)*(2*j+1)) );
+  }
+
+  for(j=0;j<4;j++) {
+    static int len[4] = { 36,36,12,36 };
+    for(i=0;i<len[j];i+=2)
+      win1[j][i] = + win[j][i];
+    for(i=1;i<len[j];i+=2)
+      win1[j][i] = - win[j][i];
+  }
+
+  for(i=0;i<16;i++)
+  {
+    double t = tan( (double) i * M_PI / 12.0 );
+    tan1_1[i] = t / (1.0+t);
+    tan2_1[i] = 1.0 / (1.0 + t);
+    tan1_2[i] = M_SQRT2 * t / (1.0+t);
+    tan2_2[i] = M_SQRT2 / (1.0 + t);
+
+    for(j=0;j<2;j++) {
+      double base = pow(2.0,-0.25*(j+1.0));
+      double p1=1.0,p2=1.0;
+      if(i > 0) {
+        if( i & 1 )
+          p1 = pow(base,(i+1.0)*0.5);
+        else
+          p2 = pow(base,i*0.5);
+      }
+      pow1_1[j][i] = p1;
+      pow2_1[j][i] = p2;
+      pow1_2[j][i] = M_SQRT2 * p1;
+      pow2_2[j][i] = M_SQRT2 * p2;
+    }
+  }
+
+  for(j=0;j<9;j++)
+  {
+   struct bandInfoStruct *bi = &bandInfo[j];
+   int *mp;
+   int cb,lwin;
+   short *bdf;
+
+   mp = map[j][0] = mapbuf0[j];
+   bdf = bi->longDiff;
+   for(i=0,cb = 0; cb < 8 ; cb++,i+=*bdf++) {
+     *mp++ = (*bdf) >> 1;
+     *mp++ = i;
+     *mp++ = 3;
+     *mp++ = cb;
+   }
+   bdf = bi->shortDiff+3;
+   for(cb=3;cb<13;cb++) {
+     int l = (*bdf++) >> 1;
+     for(lwin=0;lwin<3;lwin++) {
+       *mp++ = l;
+       *mp++ = i + lwin;
+       *mp++ = lwin;
+       *mp++ = cb;
+     }
+     i += 6*l;
+   }
+   mapend[j][0] = mp;
+
+   mp = map[j][1] = mapbuf1[j];
+   bdf = bi->shortDiff+0;
+   for(i=0,cb=0;cb<13;cb++) {
+     int l = (*bdf++) >> 1;
+     for(lwin=0;lwin<3;lwin++) {
+       *mp++ = l;
+       *mp++ = i + lwin;
+       *mp++ = lwin;
+       *mp++ = cb;
+     }
+     i += 6*l;
+   }
+   mapend[j][1] = mp;
+
+   mp = map[j][2] = mapbuf2[j];
+   bdf = bi->longDiff;
+   for(cb = 0; cb < 22 ; cb++) {
+     *mp++ = (*bdf++) >> 1;
+     *mp++ = cb;
+   }
+   mapend[j][2] = mp;
+
+  }
+
+  for(j=0;j<9;j++) {
+    for(i=0;i<23;i++) {
+      longLimit[j][i] = (bandInfo[j].longIdx[i] - 1 + 8) / 18 + 1;
+      if(longLimit[j][i] > (down_sample_sblimit) )
+        longLimit[j][i] = down_sample_sblimit;
+    }
+    for(i=0;i<14;i++) {
+      shortLimit[j][i] = (bandInfo[j].shortIdx[i] - 1) / 18 + 1;
+      if(shortLimit[j][i] > (down_sample_sblimit) )
+        shortLimit[j][i] = down_sample_sblimit;
+    }
+  }
+
+  for(i=0;i<5;i++) {
+    for(j=0;j<6;j++) {
+      for(k=0;k<6;k++) {
+        int n = k + j * 6 + i * 36;
+        i_slen2[n] = i|(j<<3)|(k<<6)|(3<<12);
+      }
+    }
+  }
+  for(i=0;i<4;i++) {
+    for(j=0;j<4;j++) {
+      for(k=0;k<4;k++) {
+        int n = k + j * 4 + i * 16;
+        i_slen2[n+180] = i|(j<<3)|(k<<6)|(4<<12);
+      }
+    }
+  }
+  for(i=0;i<4;i++) {
+    for(j=0;j<3;j++) {
+      int n = j + i * 3;
+      i_slen2[n+244] = i|(j<<3) | (5<<12);
+      n_slen2[n+500] = i|(j<<3) | (2<<12) | (1<<15);
+    }
+  }
+
+  for(i=0;i<5;i++) {
+    for(j=0;j<5;j++) {
+      for(k=0;k<4;k++) {
+        for(l=0;l<4;l++) {
+          int n = l + k * 4 + j * 16 + i * 80;
+          n_slen2[n] = i|(j<<3)|(k<<6)|(l<<9)|(0<<12);
+        }
+      }
+    }
+  }
+  for(i=0;i<5;i++) {
+    for(j=0;j<5;j++) {
+      for(k=0;k<4;k++) {
+        int n = k + j * 4 + i * 20;
+        n_slen2[n+400] = i|(j<<3)|(k<<6)|(1<<12);
+      }
+    }
+  }
+}
+
+/*
+ * read additional side information
+ */
+#ifdef MPEG1 
+static int III_get_side_info_1(struct III_sideinfo *si,int stereo,
+ int ms_stereo,long sfreq,int single)
+{
+   int ch, gr;
+   int powdiff = (single == 3) ? 4 : 0;
+
+   si->main_data_begin = getbits(9);
+   if (stereo == 1)
+     si->private_bits = getbits_fast(5);
+   else 
+     si->private_bits = getbits_fast(3);
+
+   for (ch=0; ch<stereo; ch++) {
+       si->ch[ch].gr[0].scfsi = -1;
+       si->ch[ch].gr[1].scfsi = getbits_fast(4);
+   }
+
+   for (gr=0; gr<2; gr++) 
+   {
+     for (ch=0; ch<stereo; ch++) 
+     {
+       register struct gr_info_s *gr_info = &(si->ch[ch].gr[gr]);
+
+       gr_info->part2_3_length = getbits(12);
+       gr_info->big_values = getbits_fast(9);
+       if(gr_info->big_values > 288) {
+          fprintf(stderr,"big_values too large!\n");
+          gr_info->big_values = 288;
+       }
+       gr_info->pow2gain = gainpow2+256 - getbits_fast(8) + powdiff;
+       if(ms_stereo)
+         gr_info->pow2gain += 2;
+       gr_info->scalefac_compress = getbits_fast(4);
+/* window-switching flag == 1 for block_Type != 0 .. and block-type == 0 -> win-sw-flag = 0 */
+       if(get1bit()) 
+       {
+         int i;
+         gr_info->block_type = getbits_fast(2);
+         gr_info->mixed_block_flag = get1bit();
+         gr_info->table_select[0] = getbits_fast(5);
+         gr_info->table_select[1] = getbits_fast(5);
+         /*
+          * table_select[2] not needed, because there is no region2,
+          * but to satisfy some verifications tools we set it either.
+          */
+         gr_info->table_select[2] = 0;
+         for(i=0;i<3;i++)
+           gr_info->full_gain[i] = gr_info->pow2gain + (getbits_fast(3)<<3);
+
+         if(gr_info->block_type == 0) {
+           fprintf(stderr,"Blocktype == 0 and window-switching == 1 not allowed.\n");
+           return 0;
+         }
+         /* region_count/start parameters are implicit in this case. */       
+         gr_info->region1start = 36>>1;
+         gr_info->region2start = 576>>1;
+       }
+       else 
+       {
+         int i,r0c,r1c;
+         for (i=0; i<3; i++)
+           gr_info->table_select[i] = getbits_fast(5);
+         r0c = getbits_fast(4);
+         r1c = getbits_fast(3);
+         gr_info->region1start = bandInfo[sfreq].longIdx[r0c+1] >> 1 ;
+         gr_info->region2start = bandInfo[sfreq].longIdx[r0c+1+r1c+1] >> 1;
+         gr_info->block_type = 0;
+         gr_info->mixed_block_flag = 0;
+       }
+       gr_info->preflag = get1bit();
+       gr_info->scalefac_scale = get1bit();
+       gr_info->count1table_select = get1bit();
+     }
+   }
+   return !0;
+}
+#endif
+
+/*
+ * Side Info for MPEG 2.0 / LSF
+ */
+static int III_get_side_info_2(struct III_sideinfo *si,int stereo,
+ int ms_stereo,long sfreq,int single)
+{
+   int ch;
+   int powdiff = (single == 3) ? 4 : 0;
+
+   si->main_data_begin = getbits(8);
+   if (stereo == 1)
+     si->private_bits = get1bit();
+   else 
+     si->private_bits = getbits_fast(2);
+
+   for (ch=0; ch<stereo; ch++) 
+   {
+       register struct gr_info_s *gr_info = &(si->ch[ch].gr[0]);
+
+       gr_info->part2_3_length = getbits(12);
+       gr_info->big_values = getbits_fast(9);
+       if(gr_info->big_values > 288) {
+         fprintf(stderr,"big_values too large!\n");
+         gr_info->big_values = 288;
+       }
+       gr_info->pow2gain = gainpow2+256 - getbits_fast(8) + powdiff;
+       if(ms_stereo)
+         gr_info->pow2gain += 2;
+       gr_info->scalefac_compress = getbits(9);
+/* window-switching flag == 1 for block_Type != 0 .. and block-type == 0 -> win-sw-flag = 0 */
+       if(get1bit()) 
+       {
+         int i;
+         gr_info->block_type = getbits_fast(2);
+         gr_info->mixed_block_flag = get1bit();
+         gr_info->table_select[0] = getbits_fast(5);
+         gr_info->table_select[1] = getbits_fast(5);
+         /*
+          * table_select[2] not needed, because there is no region2,
+          * but to satisfy some verifications tools we set it either.
+          */
+         gr_info->table_select[2] = 0;
+         for(i=0;i<3;i++)
+           gr_info->full_gain[i] = gr_info->pow2gain + (getbits_fast(3)<<3);
+
+         if(gr_info->block_type == 0) {
+           fprintf(stderr,"Blocktype == 0 and window-switching == 1 not allowed.\n");
+           return 0;
+         }
+         /* region_count/start parameters are implicit in this case. */       
+/* check this again! */
+         if(gr_info->block_type == 2)
+           gr_info->region1start = 36>>1;
+         else if(sfreq == 8)
+/* check this for 2.5 and sfreq=8 */
+           gr_info->region1start = 108>>1;
+         else
+           gr_info->region1start = 54>>1;
+         gr_info->region2start = 576>>1;
+       }
+       else 
+       {
+         int i,r0c,r1c;
+         for (i=0; i<3; i++)
+           gr_info->table_select[i] = getbits_fast(5);
+         r0c = getbits_fast(4);
+         r1c = getbits_fast(3);
+         gr_info->region1start = bandInfo[sfreq].longIdx[r0c+1] >> 1 ;
+         gr_info->region2start = bandInfo[sfreq].longIdx[r0c+1+r1c+1] >> 1;
+         gr_info->block_type = 0;
+         gr_info->mixed_block_flag = 0;
+       }
+       gr_info->scalefac_scale = get1bit();
+       gr_info->count1table_select = get1bit();
+   }
+   return !0;
+}
+
+/*
+ * read scalefactors
+ */
+#ifdef MPEG1
+static int III_get_scale_factors_1(int *scf,struct gr_info_s *gr_info)
+{
+   static const unsigned char slen[2][16] = {
+     {0, 0, 0, 0, 3, 1, 1, 1, 2, 2, 2, 3, 3, 3, 4, 4},
+     {0, 1, 2, 3, 0, 1, 2, 3, 1, 2, 3, 1, 2, 3, 2, 3}
+   };
+   int numbits;
+   int num0 = slen[0][gr_info->scalefac_compress];
+   int num1 = slen[1][gr_info->scalefac_compress];
+
+    if (gr_info->block_type == 2) {
+      int i=18;
+      numbits = (num0 + num1) * 18;
+
+      if (gr_info->mixed_block_flag) {
+         for (i=8;i;i--)
+           *scf++ = getbits_fast(num0);
+         i = 9;
+         numbits -= num0; /* num0 * 17 + num1 * 18 */
+      }
+
+      for (;i;i--)
+        *scf++ = getbits_fast(num0);
+      for (i = 18; i; i--)
+        *scf++ = getbits_fast(num1);
+      *scf++ = 0; *scf++ = 0; *scf++ = 0; /* short[13][0..2] = 0 */
+    }
+    else {
+      int i;
+      int scfsi = gr_info->scfsi;
+
+      if(scfsi < 0) { /* scfsi < 0 => granule == 0 */
+         for(i=11;i;i--)
+           *scf++ = getbits_fast(num0);
+         for(i=10;i;i--)
+           *scf++ = getbits_fast(num1);
+         numbits = (num0 + num1) * 10 + num0;
+         *scf++ = 0;
+      }
+      else {
+        numbits = 0;
+        if(!(scfsi & 0x8)) {
+          for (i=0;i<6;i++)
+            *scf++ = getbits_fast(num0);
+          numbits += num0 * 6;
+        }
+        else {
+          scf += 6; 
+        }
+
+        if(!(scfsi & 0x4)) {
+          for (i=0;i<5;i++)
+            *scf++ = getbits_fast(num0);
+          numbits += num0 * 5;
+        }
+        else {
+          scf += 5;
+        }
+
+        if(!(scfsi & 0x2)) {
+          for(i=0;i<5;i++)
+            *scf++ = getbits_fast(num1);
+          numbits += num1 * 5;
+        }
+        else {
+          scf += 5; 
+        }
+
+        if(!(scfsi & 0x1)) {
+          for (i=0;i<5;i++)
+            *scf++ = getbits_fast(num1);
+          numbits += num1 * 5;
+        }
+        else {
+           scf += 5;
+        }
+        *scf++ = 0;  /* no l[21] in original sources */
+      }
+    }
+    return numbits;
+}
+#endif
+
+
+static int III_get_scale_factors_2(int *scf,struct gr_info_s *gr_info,int i_stereo)
+{
+  unsigned char *pnt;
+  int i,j;
+  unsigned int slen;
+  int n = 0;
+  int numbits = 0;
+
+  static unsigned char stab[3][6][4] = {
+   { { 6, 5, 5,5 } , { 6, 5, 7,3 } , { 11,10,0,0} ,
+     { 7, 7, 7,0 } , { 6, 6, 6,3 } , {  8, 8,5,0} } ,
+   { { 9, 9, 9,9 } , { 9, 9,12,6 } , { 18,18,0,0} ,
+     {12,12,12,0 } , {12, 9, 9,6 } , { 15,12,9,0} } ,
+   { { 6, 9, 9,9 } , { 6, 9,12,6 } , { 15,18,0,0} ,
+     { 6,15,12,0 } , { 6,12, 9,6 } , {  6,18,9,0} } }; 
+
+  if(i_stereo) /* i_stereo AND second channel -> do_layer3() checks this */
+    slen = i_slen2[gr_info->scalefac_compress>>1];
+  else
+    slen = n_slen2[gr_info->scalefac_compress];
+
+  gr_info->preflag = (slen>>15) & 0x1;
+
+  n = 0;  
+  if( gr_info->block_type == 2 ) {
+    n++;
+    if(gr_info->mixed_block_flag)
+      n++;
+  }
+
+  pnt = stab[n][(slen>>12)&0x7];
+
+  for(i=0;i<4;i++) {
+    int num = slen & 0x7;
+    slen >>= 3;
+    if(num) {
+      for(j=0;j<(int)(pnt[i]);j++)
+        *scf++ = getbits_fast(num);
+      numbits += pnt[i] * num;
+    }
+    else {
+      for(j=0;j<(int)(pnt[i]);j++)
+        *scf++ = 0;
+    }
+  }
+  
+  n = (n << 1) + 1;
+  for(i=0;i<n;i++)
+    *scf++ = 0;
+
+  return numbits;
+}
+
+static int pretab1[22] = {0,0,0,0,0,0,0,0,0,0,0,1,1,1,1,2,2,3,3,3,2,0};
+static int pretab2[22] = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
+
+/*
+ * don't forget to apply the same changes to III_dequantize_sample_ms() !!! 
+ */
+static int III_dequantize_sample(real xr[SBLIMIT][SSLIMIT],int *scf,
+   struct gr_info_s *gr_info,int sfreq,int part2bits)
+{
+  int shift = 1 + gr_info->scalefac_scale;
+  real *xrpnt = (real *) xr;
+  int l[3],l3;
+  int part2remain = gr_info->part2_3_length - part2bits;
+  int *me;
+
+  {
+    int bv       = gr_info->big_values;
+    int region1  = gr_info->region1start;
+    int region2  = gr_info->region2start;
+
+    l3 = ((576>>1)-bv)>>1;   
+/*
+ * we may lose the 'odd' bit here !! 
+ * check this later again 
+ */
+    if(bv <= region1) {
+      l[0] = bv; l[1] = 0; l[2] = 0;
+    }
+    else {
+      l[0] = region1;
+      if(bv <= region2) {
+        l[1] = bv - l[0];  l[2] = 0;
+      }
+      else {
+        l[1] = region2 - l[0]; l[2] = bv - region2;
+      }
+    }
+  }
+ 
+  if(gr_info->block_type == 2) {
+    /*
+     * decoding with short or mixed mode BandIndex table 
+     */
+    int i,max[4];
+    int step=0,lwin=0,cb=0;
+    register real v = 0.0;
+    register int *m,mc;
+
+    if(gr_info->mixed_block_flag) {
+      max[3] = -1;
+      max[0] = max[1] = max[2] = 2;
+      m = map[sfreq][0];
+      me = mapend[sfreq][0];
+    }
+    else {
+      max[0] = max[1] = max[2] = max[3] = -1;
+      /* max[3] not really needed in this case */
+      m = map[sfreq][1];
+      me = mapend[sfreq][1];
+    }
+
+    mc = 0;
+    for(i=0;i<2;i++) {
+      int lp = l[i];
+      struct newhuff *h = ht+gr_info->table_select[i];
+      for(;lp;lp--,mc--) {
+        register int x,y;
+        if( (!mc) ) {
+          mc = *m++;
+          xrpnt = ((real *) xr) + (*m++);
+          lwin = *m++;
+          cb = *m++;
+          if(lwin == 3) {
+            v = gr_info->pow2gain[(*scf++) << shift];
+            step = 1;
+          }
+          else {
+            v = gr_info->full_gain[lwin][(*scf++) << shift];
+            step = 3;
+          }
+        }
+        {
+          register short *val = h->table;
+          while((y=*val++)<0) {
+            if (get1bit())
+              val -= y;
+            part2remain--;
+          }
+          x = y >> 4;
+          y &= 0xf;
+        }
+        if(x == 15) {
+          max[lwin] = cb;
+          part2remain -= h->linbits+1;
+          x += getbits(h->linbits);
+          if(get1bit())
+            *xrpnt = -ispow[x] * v;
+          else
+            *xrpnt =  ispow[x] * v;
+        }
+        else if(x) {
+          max[lwin] = cb;
+          if(get1bit())
+            *xrpnt = -ispow[x] * v;
+          else
+            *xrpnt =  ispow[x] * v;
+          part2remain--;
+        }
+        else
+          *xrpnt = 0.0;
+        xrpnt += step;
+        if(y == 15) {
+          max[lwin] = cb;
+          part2remain -= h->linbits+1;
+          y += getbits(h->linbits);
+          if(get1bit())
+            *xrpnt = -ispow[y] * v;
+          else
+            *xrpnt =  ispow[y] * v;
+        }
+        else if(y) {
+          max[lwin] = cb;
+          if(get1bit())
+            *xrpnt = -ispow[y] * v;
+          else
+            *xrpnt =  ispow[y] * v;
+          part2remain--;
+        }
+        else
+          *xrpnt = 0.0;
+        xrpnt += step;
+      }
+    }
+    for(;l3 && (part2remain > 0);l3--) {
+      struct newhuff *h = htc+gr_info->count1table_select;
+      register short *val = h->table,a;
+
+      while((a=*val++)<0) {
+        part2remain--;
+        if(part2remain < 0) {
+          part2remain++;
+          a = 0;
+          break;
+        }
+        if (get1bit())
+          val -= a;
+      }
+
+      for(i=0;i<4;i++) {
+        if(!(i & 1)) {
+          if(!mc) {
+            mc = *m++;
+            xrpnt = ((real *) xr) + (*m++);
+            lwin = *m++;
+            cb = *m++;
+            if(lwin == 3) {
+              v = gr_info->pow2gain[(*scf++) << shift];
+              step = 1;
+            }
+            else {
+              v = gr_info->full_gain[lwin][(*scf++) << shift];
+              step = 3;
+            }
+          }
+          mc--;
+        }
+        if( (a & (0x8>>i)) ) {
+          max[lwin] = cb;
+          part2remain--;
+          if(part2remain < 0) {
+            part2remain++;
+            break;
+          }
+          if(get1bit()) 
+            *xrpnt = -v;
+          else
+            *xrpnt = v;
+        }
+        else
+          *xrpnt = 0.0;
+        xrpnt += step;
+      }
+    }
+ 
+    while( m < me ) {
+      if(!mc) {
+        mc = *m++;
+        xrpnt = ((real *) xr) + *m++;
+        if( (*m++) == 3)
+          step = 1;
+        else
+          step = 3;
+        m++; /* cb */
+      }
+      mc--;
+      *xrpnt = 0.0;
+      xrpnt += step;
+      *xrpnt = 0.0;
+      xrpnt += step;
+/* we could add a little opt. here:
+ * if we finished a band for window 3 or a long band
+ * further bands could copied in a simple loop without a
+ * special 'map' decoding
+ */
+    }
+
+    gr_info->maxband[0] = max[0]+1;
+    gr_info->maxband[1] = max[1]+1;
+    gr_info->maxband[2] = max[2]+1;
+    gr_info->maxbandl = max[3]+1;
+
+    {
+      int rmax = max[0] > max[1] ? max[0] : max[1];
+      rmax = (rmax > max[2] ? rmax : max[2]) + 1;
+      gr_info->maxb = rmax ? shortLimit[sfreq][rmax] : longLimit[sfreq][max[3]+1];
+    }
+
+  }
+  else {
+	/*
+     * decoding with 'long' BandIndex table (block_type != 2)
+     */
+    int *pretab = gr_info->preflag ? pretab1 : pretab2;
+    int i,max = -1;
+    int cb = 0;
+    register int *m = map[sfreq][2];
+    register real v = 0.0;
+    register int mc = 0;
+#if 0
+    me = mapend[sfreq][2];
+#endif
+
+	/*
+     * long hash table values
+     */
+    for(i=0;i<3;i++) {
+      int lp = l[i];
+      struct newhuff *h = ht+gr_info->table_select[i];
+
+      for(;lp;lp--,mc--) {
+        int x,y;
+
+        if(!mc) {
+          mc = *m++;
+          v = gr_info->pow2gain[((*scf++) + (*pretab++)) << shift];
+          cb = *m++;
+        }
+        {
+          register short *val = h->table;
+          while((y=*val++)<0) {
+            if (get1bit())
+              val -= y;
+            part2remain--;
+          }
+          x = y >> 4;
+          y &= 0xf;
+        }
+        if (x == 15) {
+          max = cb;
+          part2remain -= h->linbits+1;
+          x += getbits(h->linbits);
+          if(get1bit())
+            *xrpnt++ = -ispow[x] * v;
+          else
+            *xrpnt++ =  ispow[x] * v;
+        }
+        else if(x) {
+          max = cb;
+          if(get1bit())
+            *xrpnt++ = -ispow[x] * v;
+          else
+            *xrpnt++ =  ispow[x] * v;
+          part2remain--;
+        }
+        else
+          *xrpnt++ = 0.0;
+
+        if (y == 15) {
+          max = cb;
+          part2remain -= h->linbits+1;
+          y += getbits(h->linbits);
+          if(get1bit())
+            *xrpnt++ = -ispow[y] * v;
+          else
+            *xrpnt++ =  ispow[y] * v;
+        }
+        else if(y) {
+          max = cb;
+          if(get1bit())
+            *xrpnt++ = -ispow[y] * v;
+          else
+            *xrpnt++ =  ispow[y] * v;
+          part2remain--;
+        }
+        else
+          *xrpnt++ = 0.0;
+      }
+    }
+
+	/*
+     * short (count1table) values
+     */
+    for(;l3 && (part2remain > 0);l3--) {
+      struct newhuff *h = htc+gr_info->count1table_select;
+      register short *val = h->table,a;
+
+      while((a=*val++)<0) {
+        part2remain--;
+        if(part2remain < 0) {
+          part2remain++;
+          a = 0;
+          break;
+        }
+        if (get1bit())
+          val -= a;
+      }
+
+      for(i=0;i<4;i++) {
+        if(!(i & 1)) {
+          if(!mc) {
+            mc = *m++;
+            cb = *m++;
+            v = gr_info->pow2gain[((*scf++) + (*pretab++)) << shift];
+          }
+          mc--;
+        }
+        if ( (a & (0x8>>i)) ) {
+          max = cb;
+          part2remain--;
+          if(part2remain < 0) {
+            part2remain++;
+            break;
+          }
+          if(get1bit())
+            *xrpnt++ = -v;
+          else
+            *xrpnt++ = v;
+        }
+        else
+          *xrpnt++ = 0.0;
+      }
+    }
+
+	/* 
+     * zero part
+     */
+    for(i=(&xr[SBLIMIT][0]-xrpnt)>>1;i;i--) {
+      *xrpnt++ = 0.0;
+      *xrpnt++ = 0.0;
+    }
+
+    gr_info->maxbandl = max+1;
+    gr_info->maxb = longLimit[sfreq][gr_info->maxbandl];
+  }
+
+  while( part2remain > 16 ) {
+    getbits(16); /* Dismiss stuffing Bits */
+    part2remain -= 16;
+  }
+  if(part2remain > 0)
+    getbits(part2remain);
+  else if(part2remain < 0) {
+    fprintf(stderr,"mpg123: Can't rewind stream by %d bits!\n",-part2remain);
+    return 1; /* -> error */
+  }
+  return 0;
+}
+
+#if 0
+static int III_dequantize_sample_ms(real xr[2][SBLIMIT][SSLIMIT],int *scf,
+   struct gr_info_s *gr_info,int sfreq,int part2bits)
+{
+  int shift = 1 + gr_info->scalefac_scale;
+  real *xrpnt = (real *) xr[1];
+  real *xr0pnt = (real *) xr[0];
+  int l[3],l3;
+  int part2remain = gr_info->part2_3_length - part2bits;
+  int *me;
+
+  {
+    int bv       = gr_info->big_values;
+    int region1  = gr_info->region1start;
+    int region2  = gr_info->region2start;
+
+    l3 = ((576>>1)-bv)>>1;   
+/*
+ * we may lose the 'odd' bit here !! 
+ * check this later gain 
+ */
+    if(bv <= region1) {
+      l[0] = bv; l[1] = 0; l[2] = 0;
+    }
+    else {
+      l[0] = region1;
+      if(bv <= region2) {
+        l[1] = bv - l[0];  l[2] = 0;
+      }
+      else {
+        l[1] = region2 - l[0]; l[2] = bv - region2;
+      }
+    }
+  }
+ 
+  if(gr_info->block_type == 2) {
+    int i,max[4];
+    int step=0,lwin=0,cb=0;
+    register real v = 0.0;
+    register int *m,mc = 0;
+
+    if(gr_info->mixed_block_flag) {
+      max[3] = -1;
+      max[0] = max[1] = max[2] = 2;
+      m = map[sfreq][0];
+      me = mapend[sfreq][0];
+    }
+    else {
+      max[0] = max[1] = max[2] = max[3] = -1;
+      /* max[3] not really needed in this case */
+      m = map[sfreq][1];
+      me = mapend[sfreq][1];
+    }
+
+    for(i=0;i<2;i++) {
+      int lp = l[i];
+      struct newhuff *h = ht+gr_info->table_select[i];
+      for(;lp;lp--,mc--) {
+        int x,y;
+
+        if(!mc) {
+          mc = *m++;
+          xrpnt = ((real *) xr[1]) + *m;
+          xr0pnt = ((real *) xr[0]) + *m++;
+          lwin = *m++;
+          cb = *m++;
+          if(lwin == 3) {
+            v = gr_info->pow2gain[(*scf++) << shift];
+            step = 1;
+          }
+          else {
+            v = gr_info->full_gain[lwin][(*scf++) << shift];
+            step = 3;
+          }
+        }
+        {
+          register short *val = h->table;
+          while((y=*val++)<0) {
+            if (get1bit())
+              val -= y;
+            part2remain--;
+          }
+          x = y >> 4;
+          y &= 0xf;
+        }
+        if(x == 15) {
+          max[lwin] = cb;
+          part2remain -= h->linbits+1;
+          x += getbits(h->linbits);
+          if(get1bit()) {
+            real a = ispow[x] * v;
+            *xrpnt = *xr0pnt + a;
+            *xr0pnt -= a;
+          }
+          else {
+            real a = ispow[x] * v;
+            *xrpnt = *xr0pnt - a;
+            *xr0pnt += a;
+          }
+        }
+        else if(x) {
+          max[lwin] = cb;
+          if(get1bit()) {
+            real a = ispow[x] * v;
+            *xrpnt = *xr0pnt + a;
+            *xr0pnt -= a;
+          }
+          else {
+            real a = ispow[x] * v;
+            *xrpnt = *xr0pnt - a;
+            *xr0pnt += a;
+          }
+          part2remain--;
+        }
+        else
+          *xrpnt = *xr0pnt;
+        xrpnt += step;
+        xr0pnt += step;
+
+        if(y == 15) {
+          max[lwin] = cb;
+          part2remain -= h->linbits+1;
+          y += getbits(h->linbits);
+          if(get1bit()) {
+            real a = ispow[y] * v;
+            *xrpnt = *xr0pnt + a;
+            *xr0pnt -= a;
+          }
+          else {
+            real a = ispow[y] * v;
+            *xrpnt = *xr0pnt - a;
+            *xr0pnt += a;
+          }
+        }
+        else if(y) {
+          max[lwin] = cb;
+          if(get1bit()) {
+            real a = ispow[y] * v;
+            *xrpnt = *xr0pnt + a;
+            *xr0pnt -= a;
+          }
+          else {
+            real a = ispow[y] * v;
+            *xrpnt = *xr0pnt - a;
+            *xr0pnt += a;
+          }
+          part2remain--;
+        }
+        else
+          *xrpnt = *xr0pnt;
+        xrpnt += step;
+        xr0pnt += step;
+      }
+    }
+
+    for(;l3 && (part2remain > 0);l3--) {
+      struct newhuff *h = htc+gr_info->count1table_select;
+      register short *val = h->table,a;
+
+      while((a=*val++)<0) {
+        part2remain--;
+        if(part2remain < 0) {
+          part2remain++;
+          a = 0;
+          break;
+        }
+        if (get1bit())
+          val -= a;
+      }
+
+      for(i=0;i<4;i++) {
+        if(!(i & 1)) {
+          if(!mc) {
+            mc = *m++;
+            xrpnt = ((real *) xr[1]) + *m;
+            xr0pnt = ((real *) xr[0]) + *m++;
+            lwin = *m++;
+            cb = *m++;
+            if(lwin == 3) {
+              v = gr_info->pow2gain[(*scf++) << shift];
+              step = 1;
+            }
+            else {
+              v = gr_info->full_gain[lwin][(*scf++) << shift];
+              step = 3;
+            }
+          }
+          mc--;
+        }
+        if( (a & (0x8>>i)) ) {
+          max[lwin] = cb;
+          part2remain--;
+          if(part2remain < 0) {
+            part2remain++;
+            break;
+          }
+          if(get1bit()) {
+            *xrpnt = *xr0pnt + v;
+            *xr0pnt -= v;
+          }
+          else {
+            *xrpnt = *xr0pnt - v;
+            *xr0pnt += v;
+          }
+        }
+        else
+          *xrpnt = *xr0pnt;
+        xrpnt += step;
+        xr0pnt += step;
+      }
+    }
+ 
+    while( m < me ) {
+      if(!mc) {
+        mc = *m++;
+        xrpnt = ((real *) xr[1]) + *m;
+        xr0pnt = ((real *) xr[0]) + *m++;
+        if(*m++ == 3)
+          step = 1;
+        else
+          step = 3;
+        m++; /* cb */
+      }
+      mc--;
+      *xrpnt = *xr0pnt;
+      xrpnt += step;
+      xr0pnt += step;
+      *xrpnt = *xr0pnt;
+      xrpnt += step;
+      xr0pnt += step;
+/* we could add a little opt. here:
+ * if we finished a band for window 3 or a long band
+ * further bands could copied in a simple loop without a
+ * special 'map' decoding
+ */
+    }
+
+    gr_info->maxband[0] = max[0]+1;
+    gr_info->maxband[1] = max[1]+1;
+    gr_info->maxband[2] = max[2]+1;
+    gr_info->maxbandl = max[3]+1;
+
+    {
+      int rmax = max[0] > max[1] ? max[0] : max[1];
+      rmax = (rmax > max[2] ? rmax : max[2]) + 1;
+      gr_info->maxb = rmax ? shortLimit[sfreq][rmax] : longLimit[sfreq][max[3]+1];
+    }
+  }
+  else {
+    int *pretab = gr_info->preflag ? pretab1 : pretab2;
+    int i,max = -1;
+    int cb = 0;
+    register int mc=0,*m = map[sfreq][2];
+    register real v = 0.0;
+#if 0
+    me = mapend[sfreq][2];
+#endif
+
+    for(i=0;i<3;i++) {
+      int lp = l[i];
+      struct newhuff *h = ht+gr_info->table_select[i];
+
+      for(;lp;lp--,mc--) {
+        int x,y;
+        if(!mc) {
+          mc = *m++;
+          cb = *m++;
+          v = gr_info->pow2gain[((*scf++) + (*pretab++)) << shift];
+        }
+        {
+          register short *val = h->table;
+          while((y=*val++)<0) {
+            if (get1bit())
+              val -= y;
+            part2remain--;
+          }
+          x = y >> 4;
+          y &= 0xf;
+        }
+        if (x == 15) {
+          max = cb;
+          part2remain -= h->linbits+1;
+          x += getbits(h->linbits);
+          if(get1bit()) {
+            real a = ispow[x] * v;
+            *xrpnt++ = *xr0pnt + a;
+            *xr0pnt++ -= a;
+          }
+          else {
+            real a = ispow[x] * v;
+            *xrpnt++ = *xr0pnt - a;
+            *xr0pnt++ += a;
+          }
+        }
+        else if(x) {
+          max = cb;
+          if(get1bit()) {
+            real a = ispow[x] * v;
+            *xrpnt++ = *xr0pnt + a;
+            *xr0pnt++ -= a;
+          }
+          else {
+            real a = ispow[x] * v;
+            *xrpnt++ = *xr0pnt - a;
+            *xr0pnt++ += a;
+          }
+          part2remain--;
+        }
+        else
+          *xrpnt++ = *xr0pnt++;
+
+        if (y == 15) {
+          max = cb;
+          part2remain -= h->linbits+1;
+          y += getbits(h->linbits);
+          if(get1bit()) {
+            real a = ispow[y] * v;
+            *xrpnt++ = *xr0pnt + a;
+            *xr0pnt++ -= a;
+          }
+          else {
+            real a = ispow[y] * v;
+            *xrpnt++ = *xr0pnt - a;
+            *xr0pnt++ += a;
+          }
+        }
+        else if(y) {
+          max = cb;
+          if(get1bit()) {
+            real a = ispow[y] * v;
+            *xrpnt++ = *xr0pnt + a;
+            *xr0pnt++ -= a;
+          }
+          else {
+            real a = ispow[y] * v;
+            *xrpnt++ = *xr0pnt - a;
+            *xr0pnt++ += a;
+          }
+          part2remain--;
+        }
+        else
+          *xrpnt++ = *xr0pnt++;
+      }
+    }
+
+    for(;l3 && (part2remain > 0);l3--) {
+      struct newhuff *h = htc+gr_info->count1table_select;
+      register short *val = h->table,a;
+
+      while((a=*val++)<0) {
+        part2remain--;
+        if(part2remain < 0) {
+          part2remain++;
+          a = 0;
+          break;
+        }
+        if (get1bit())
+          val -= a;
+      }
+
+      for(i=0;i<4;i++) {
+        if(!(i & 1)) {
+          if(!mc) {
+            mc = *m++;
+            cb = *m++;
+            v = gr_info->pow2gain[((*scf++) + (*pretab++)) << shift];
+          }
+          mc--;
+        }
+        if ( (a & (0x8>>i)) ) {
+          max = cb;
+          part2remain--;
+          if(part2remain <= 0) {
+            part2remain++;
+            break;
+          }
+          if(get1bit()) {
+            *xrpnt++ = *xr0pnt + v;
+            *xr0pnt++ -= v;
+          }
+          else {
+            *xrpnt++ = *xr0pnt - v;
+            *xr0pnt++ += v;
+          }
+        }
+        else
+          *xrpnt++ = *xr0pnt++;
+      }
+    }
+    for(i=(&xr[1][SBLIMIT][0]-xrpnt)>>1;i;i--) {
+      *xrpnt++ = *xr0pnt++;
+      *xrpnt++ = *xr0pnt++;
+    }
+
+    gr_info->maxbandl = max+1;
+    gr_info->maxb = longLimit[sfreq][gr_info->maxbandl];
+  }
+
+  while ( part2remain > 16 ) {
+    getbits(16); /* Dismiss stuffing Bits */
+    part2remain -= 16;
+  }
+  if(part2remain > 0 )
+    getbits(part2remain);
+  else if(part2remain < 0) {
+    fprintf(stderr,"mpg123_ms: Can't rewind stream by %d bits!\n",-part2remain);
+    return 1; /* -> error */
+  }
+  return 0;
+}
+#endif
+
+/* 
+ * III_stereo: calculate real channel values for Joint-I-Stereo-mode
+ */
+static void III_i_stereo(real xr_buf[2][SBLIMIT][SSLIMIT],int *scalefac,
+   struct gr_info_s *gr_info,int sfreq,int ms_stereo,int lsf)
+{
+      real (*xr)[SBLIMIT*SSLIMIT] = (real (*)[SBLIMIT*SSLIMIT] ) xr_buf;
+      struct bandInfoStruct *bi = &bandInfo[sfreq];
+      real *tab1,*tab2;
+
+      if(lsf) {
+        int p = gr_info->scalefac_compress & 0x1;
+	    if(ms_stereo) {
+          tab1 = pow1_2[p]; tab2 = pow2_2[p];
+        }
+        else {
+          tab1 = pow1_1[p]; tab2 = pow2_1[p];
+        }
+      }
+      else {
+        if(ms_stereo) {
+          tab1 = tan1_2; tab2 = tan2_2;
+        }
+        else {
+          tab1 = tan1_1; tab2 = tan2_1;
+        }
+      }
+
+      if (gr_info->block_type == 2)
+      {
+         int lwin,do_l = 0;
+         if( gr_info->mixed_block_flag )
+           do_l = 1;
+
+         for (lwin=0;lwin<3;lwin++) /* process each window */
+         {
+             /* get first band with zero values */
+           int is_p,sb,idx,sfb = gr_info->maxband[lwin];  /* sfb is minimal 3 for mixed mode */
+           if(sfb > 3)
+             do_l = 0;
+
+           for(;sfb<12;sfb++)
+           {
+             is_p = scalefac[sfb*3+lwin-gr_info->mixed_block_flag]; /* scale: 0-15 */ 
+             if(is_p != 7) {
+               real t1,t2;
+               sb = bi->shortDiff[sfb];
+               idx = bi->shortIdx[sfb] + lwin;
+               t1 = tab1[is_p]; t2 = tab2[is_p];
+               for (; sb > 0; sb--,idx+=3)
+               {
+                 real v = xr[0][idx];
+                 xr[0][idx] = v * t1;
+                 xr[1][idx] = v * t2;
+               }
+             }
+           }
+
+#if 1
+/* in the original: copy 10 to 11 , here: copy 11 to 12 
+maybe still wrong??? (copy 12 to 13?) */
+           is_p = scalefac[11*3+lwin-gr_info->mixed_block_flag]; /* scale: 0-15 */
+           sb = bi->shortDiff[12];
+           idx = bi->shortIdx[12] + lwin;
+#else
+           is_p = scalefac[10*3+lwin-gr_info->mixed_block_flag]; /* scale: 0-15 */
+           sb = bi->shortDiff[11];
+           idx = bi->shortIdx[11] + lwin;
+#endif
+           if(is_p != 7)
+           {
+             real t1,t2;
+             t1 = tab1[is_p]; t2 = tab2[is_p];
+             for ( ; sb > 0; sb--,idx+=3 )
+             {  
+               real v = xr[0][idx];
+               xr[0][idx] = v * t1;
+               xr[1][idx] = v * t2;
+             }
+           }
+         } /* end for(lwin; .. ; . ) */
+
+         if (do_l)
+         {
+/* also check l-part, if ALL bands in the three windows are 'empty'
+ * and mode = mixed_mode 
+ */
+           int sfb = gr_info->maxbandl;
+           int idx = bi->longIdx[sfb];
+
+           for ( ; sfb<8; sfb++ )
+           {
+             int sb = bi->longDiff[sfb];
+             int is_p = scalefac[sfb]; /* scale: 0-15 */
+             if(is_p != 7) {
+               real t1,t2;
+               t1 = tab1[is_p]; t2 = tab2[is_p];
+               for ( ; sb > 0; sb--,idx++)
+               {
+                 real v = xr[0][idx];
+                 xr[0][idx] = v * t1;
+                 xr[1][idx] = v * t2;
+               }
+             }
+             else 
+               idx += sb;
+           }
+         }     
+      } 
+      else /* ((gr_info->block_type != 2)) */
+      {
+        int sfb = gr_info->maxbandl;
+        int is_p,idx = bi->longIdx[sfb];
+        for ( ; sfb<21; sfb++)
+        {
+          int sb = bi->longDiff[sfb];
+          is_p = scalefac[sfb]; /* scale: 0-15 */
+          if(is_p != 7) {
+            real t1,t2;
+            t1 = tab1[is_p]; t2 = tab2[is_p];
+            for ( ; sb > 0; sb--,idx++)
+            {
+               real v = xr[0][idx];
+               xr[0][idx] = v * t1;
+               xr[1][idx] = v * t2;
+            }
+          }
+          else
+            idx += sb;
+        }
+
+        is_p = scalefac[20]; /* copy l-band 20 to l-band 21 */
+        if(is_p != 7)
+        {
+          int sb;
+          real t1 = tab1[is_p],t2 = tab2[is_p]; 
+
+          for ( sb = bi->longDiff[21]; sb > 0; sb--,idx++ )
+          {
+            real v = xr[0][idx];
+            xr[0][idx] = v * t1;
+            xr[1][idx] = v * t2;
+          }
+        }
+      } /* ... */
+}
+
+static void III_antialias(real xr[SBLIMIT][SSLIMIT],struct gr_info_s *gr_info)
+{
+   int sblim;
+
+   if(gr_info->block_type == 2)
+   {
+      if(!gr_info->mixed_block_flag) 
+        return;
+      sblim = 1; 
+   }
+   else {
+     sblim = gr_info->maxb-1;
+   }
+
+   /* 31 alias-reduction operations between each pair of sub-bands */
+   /* with 8 butterflies between each pair                         */
+
+   {
+     int sb;
+     real *xr1=(real *) xr[1];
+
+     for(sb=sblim;sb;sb--,xr1+=10)
+     {
+       int ss;
+       real *cs=aa_cs,*ca=aa_ca;
+       real *xr2 = xr1;
+
+       for(ss=7;ss>=0;ss--)
+       {       /* upper and lower butterfly inputs */
+         register real bu = *--xr2,bd = *xr1;
+         *xr2   = (bu * (*cs)   ) - (bd * (*ca)   );
+         *xr1++ = (bd * (*cs++) ) + (bu * (*ca++) );
+       }
+     }
+  }
+}
+
+/*
+ DCT insipired by Jeff Tsay's DCT from the maplay package
+ this is an optimized version with manual unroll.
+
+ References:
+ [1] S. Winograd: "On Computing the Discrete Fourier Transform",
+     Mathematics of Computation, Volume 32, Number 141, January 1978,
+     Pages 175-199
+*/
+
+static void dct36(real *inbuf,real *o1,real *o2,real *wintab,real *tsbuf)
+{
+  {
+    register real *in = inbuf;
+
+    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];
+
+    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];
+
+
+  {
+
+#define MACRO0(v) { \
+    real tmp; \
+    out2[9+(v)] = (tmp = sum0 + sum1) * w[27+(v)]; \
+    out2[8-(v)] = tmp * w[26-(v)];  } \
+    sum0 -= sum1; \
+    ts[SBLIMIT*(8-(v))] = out1[8-(v)] + sum0 * w[8-(v)]; \
+    ts[SBLIMIT*(9+(v))] = out1[9+(v)] + sum0 * w[9+(v)]; 
+#define MACRO1(v) { \
+	real sum0,sum1; \
+    sum0 = tmp1a + tmp2a; \
+	sum1 = (tmp1b + tmp2b) * tfcos36[(v)]; \
+	MACRO0(v); }
+#define MACRO2(v) { \
+    real sum0,sum1; \
+    sum0 = tmp2a - tmp1a; \
+    sum1 = (tmp2b - tmp1b) * tfcos36[(v)]; \
+	MACRO0(v); }
+
+    register const real *c = COS9;
+    register real *out2 = o2;
+	register real *w = wintab;
+	register real *out1 = o1;
+	register real *ts = tsbuf;
+
+    real ta33,ta66,tb33,tb66;
+
+    ta33 = in[2*3+0] * c[3];
+    ta66 = in[2*6+0] * c[6];
+    tb33 = in[2*3+1] * c[3];
+    tb66 = in[2*6+1] * c[6];
+
+    { 
+      real tmp1a,tmp2a,tmp1b,tmp2b;
+      tmp1a =             in[2*1+0] * c[1] + ta33 + in[2*5+0] * c[5] + in[2*7+0] * c[7];
+      tmp1b =             in[2*1+1] * c[1] + tb33 + in[2*5+1] * c[5] + in[2*7+1] * c[7];
+      tmp2a = in[2*0+0] + in[2*2+0] * c[2] + in[2*4+0] * c[4] + ta66 + in[2*8+0] * c[8];
+      tmp2b = in[2*0+1] + in[2*2+1] * c[2] + in[2*4+1] * c[4] + tb66 + in[2*8+1] * c[8];
+
+      MACRO1(0);
+      MACRO2(8);
+    }
+
+    {
+      real tmp1a,tmp2a,tmp1b,tmp2b;
+      tmp1a = ( in[2*1+0] - in[2*5+0] - in[2*7+0] ) * c[3];
+      tmp1b = ( in[2*1+1] - in[2*5+1] - in[2*7+1] ) * c[3];
+      tmp2a = ( in[2*2+0] - in[2*4+0] - in[2*8+0] ) * c[6] - in[2*6+0] + in[2*0+0];
+      tmp2b = ( in[2*2+1] - in[2*4+1] - in[2*8+1] ) * c[6] - in[2*6+1] + in[2*0+1];
+
+      MACRO1(1);
+      MACRO2(7);
+    }
+
+    {
+      real tmp1a,tmp2a,tmp1b,tmp2b;
+      tmp1a =             in[2*1+0] * c[5] - ta33 - in[2*5+0] * c[7] + in[2*7+0] * c[1];
+      tmp1b =             in[2*1+1] * c[5] - tb33 - in[2*5+1] * c[7] + in[2*7+1] * c[1];
+      tmp2a = in[2*0+0] - in[2*2+0] * c[8] - in[2*4+0] * c[2] + ta66 + in[2*8+0] * c[4];
+      tmp2b = in[2*0+1] - in[2*2+1] * c[8] - in[2*4+1] * c[2] + tb66 + in[2*8+1] * c[4];
+
+      MACRO1(2);
+      MACRO2(6);
+    }
+
+    {
+      real tmp1a,tmp2a,tmp1b,tmp2b;
+      tmp1a =             in[2*1+0] * c[7] - ta33 + in[2*5+0] * c[1] - in[2*7+0] * c[5];
+      tmp1b =             in[2*1+1] * c[7] - tb33 + in[2*5+1] * c[1] - in[2*7+1] * c[5];
+      tmp2a = in[2*0+0] - in[2*2+0] * c[4] + in[2*4+0] * c[8] + ta66 - in[2*8+0] * c[2];
+      tmp2b = in[2*0+1] - in[2*2+1] * c[4] + in[2*4+1] * c[8] + tb66 - in[2*8+1] * c[2];
+
+      MACRO1(3);
+      MACRO2(5);
+    }
+
+	{
+		real sum0,sum1;
+    	sum0 =  in[2*0+0] - in[2*2+0] + in[2*4+0] - in[2*6+0] + in[2*8+0];
+    	sum1 = (in[2*0+1] - in[2*2+1] + in[2*4+1] - in[2*6+1] + in[2*8+1] ) * tfcos36[4];
+		MACRO0(4);
+	}
+  }
+
+  }
+}
+
+/*
+ * new DCT12
+ */
+static void dct12(real *in,real *rawout1,real *rawout2,register real *wi,register real *ts)
+{
+#define DCT12_PART1 \
+             in5 = in[5*3];  \
+     in5 += (in4 = in[4*3]); \
+     in4 += (in3 = in[3*3]); \
+     in3 += (in2 = in[2*3]); \
+     in2 += (in1 = in[1*3]); \
+     in1 += (in0 = in[0*3]); \
+                             \
+     in5 += in3; in3 += in1; \
+                             \
+     in2 *= COS6_1; \
+     in3 *= COS6_1; \
+
+#define DCT12_PART2 \
+     in0 += in4 * COS6_2; \
+                          \
+     in4 = in0 + in2;     \
+     in0 -= in2;          \
+                          \
+     in1 += in5 * COS6_2; \
+                          \
+     in5 = (in1 + in3) * tfcos12[0]; \
+     in1 = (in1 - in3) * tfcos12[2]; \
+                         \
+     in3 = in4 + in5;    \
+     in4 -= in5;         \
+                         \
+     in2 = in0 + in1;    \
+     in0 -= in1;
+
+
+   {
+     real in0,in1,in2,in3,in4,in5;
+     register real *out1 = rawout1;
+     ts[SBLIMIT*0] = out1[0]; ts[SBLIMIT*1] = out1[1]; ts[SBLIMIT*2] = out1[2];
+     ts[SBLIMIT*3] = out1[3]; ts[SBLIMIT*4] = out1[4]; ts[SBLIMIT*5] = out1[5];
+ 
+     DCT12_PART1
+
+     {
+       real tmp0,tmp1 = (in0 - in4);
+       {
+         real tmp2 = (in1 - in5) * tfcos12[1];
+         tmp0 = tmp1 + tmp2;
+         tmp1 -= tmp2;
+       }
+       ts[(17-1)*SBLIMIT] = out1[17-1] + tmp0 * wi[11-1];
+       ts[(12+1)*SBLIMIT] = out1[12+1] + tmp0 * wi[6+1];
+       ts[(6 +1)*SBLIMIT] = out1[6 +1] + tmp1 * wi[1];
+       ts[(11-1)*SBLIMIT] = out1[11-1] + tmp1 * wi[5-1];
+     }
+
+     DCT12_PART2
+
+     ts[(17-0)*SBLIMIT] = out1[17-0] + in2 * wi[11-0];
+     ts[(12+0)*SBLIMIT] = out1[12+0] + in2 * wi[6+0];
+     ts[(12+2)*SBLIMIT] = out1[12+2] + in3 * wi[6+2];
+     ts[(17-2)*SBLIMIT] = out1[17-2] + in3 * wi[11-2];
+
+     ts[(6+0)*SBLIMIT]  = out1[6+0] + in0 * wi[0];
+     ts[(11-0)*SBLIMIT] = out1[11-0] + in0 * wi[5-0];
+     ts[(6+2)*SBLIMIT]  = out1[6+2] + in4 * wi[2];
+     ts[(11-2)*SBLIMIT] = out1[11-2] + in4 * wi[5-2];
+  }
+
+  in++;
+
+  {
+     real in0,in1,in2,in3,in4,in5;
+     register real *out2 = rawout2;
+ 
+     DCT12_PART1
+
+     {
+       real tmp0,tmp1 = (in0 - in4);
+       {
+         real tmp2 = (in1 - in5) * tfcos12[1];
+         tmp0 = tmp1 + tmp2;
+         tmp1 -= tmp2;
+       }
+       out2[5-1] = tmp0 * wi[11-1];
+       out2[0+1] = tmp0 * wi[6+1];
+       ts[(12+1)*SBLIMIT] += tmp1 * wi[1];
+       ts[(17-1)*SBLIMIT] += tmp1 * wi[5-1];
+     }
+
+     DCT12_PART2
+
+     out2[5-0] = in2 * wi[11-0];
+     out2[0+0] = in2 * wi[6+0];
+     out2[0+2] = in3 * wi[6+2];
+     out2[5-2] = in3 * wi[11-2];
+
+     ts[(12+0)*SBLIMIT] += in0 * wi[0];
+     ts[(17-0)*SBLIMIT] += in0 * wi[5-0];
+     ts[(12+2)*SBLIMIT] += in4 * wi[2];
+     ts[(17-2)*SBLIMIT] += in4 * wi[5-2];
+  }
+
+  in++; 
+
+  {
+     real in0,in1,in2,in3,in4,in5;
+     register real *out2 = rawout2;
+     out2[12]=out2[13]=out2[14]=out2[15]=out2[16]=out2[17]=0.0;
+
+     DCT12_PART1
+
+     {
+       real tmp0,tmp1 = (in0 - in4);
+       {
+         real tmp2 = (in1 - in5) * tfcos12[1];
+         tmp0 = tmp1 + tmp2;
+         tmp1 -= tmp2;
+       }
+       out2[11-1] = tmp0 * wi[11-1];
+       out2[6 +1] = tmp0 * wi[6+1];
+       out2[0+1] += tmp1 * wi[1];
+       out2[5-1] += tmp1 * wi[5-1];
+     }
+
+     DCT12_PART2
+
+     out2[11-0] = in2 * wi[11-0];
+     out2[6 +0] = in2 * wi[6+0];
+     out2[6 +2] = in3 * wi[6+2];
+     out2[11-2] = in3 * wi[11-2];
+
+     out2[0+0] += in0 * wi[0];
+     out2[5-0] += in0 * wi[5-0];
+     out2[0+2] += in4 * wi[2];
+     out2[5-2] += in4 * wi[5-2];
+  }
+}
+
+/*
+ * III_hybrid
+ */
+static void III_hybrid(real fsIn[SBLIMIT][SSLIMIT],real tsOut[SSLIMIT][SBLIMIT],
+   int ch,struct gr_info_s *gr_info)
+{
+   real *tspnt = (real *) tsOut;
+   real (*block)[2][SBLIMIT*SSLIMIT] = gmp->hybrid_block;
+   int *blc = gmp->hybrid_blc;
+   real *rawout1,*rawout2;
+   int bt;
+   int sb = 0;
+
+   {
+     int b = blc[ch];
+     rawout1=block[b][ch];
+     b=-b+1;
+     rawout2=block[b][ch];
+     blc[ch] = b;
+   }
+
+  
+   if(gr_info->mixed_block_flag) {
+     sb = 2;
+     dct36(fsIn[0],rawout1,rawout2,win[0],tspnt);
+     dct36(fsIn[1],rawout1+18,rawout2+18,win1[0],tspnt+1);
+     rawout1 += 36; rawout2 += 36; tspnt += 2;
+   }
+ 
+   bt = gr_info->block_type;
+   if(bt == 2) {
+     for (; sb<gr_info->maxb; sb+=2,tspnt+=2,rawout1+=36,rawout2+=36) {
+       dct12(fsIn[sb],rawout1,rawout2,win[2],tspnt);
+       dct12(fsIn[sb+1],rawout1+18,rawout2+18,win1[2],tspnt+1);
+     }
+   }
+   else {
+     for (; sb<gr_info->maxb; sb+=2,tspnt+=2,rawout1+=36,rawout2+=36) {
+       dct36(fsIn[sb],rawout1,rawout2,win[bt],tspnt);
+       dct36(fsIn[sb+1],rawout1+18,rawout2+18,win1[bt],tspnt+1);
+     }
+   }
+
+   for(;sb<SBLIMIT;sb++,tspnt++) {
+     int i;
+     for(i=0;i<SSLIMIT;i++) {
+       tspnt[i*SBLIMIT] = *rawout1++;
+       *rawout2++ = 0.0;
+     }
+   }
+}
+
+/*
+ * main layer3 handler
+ */
+int do_layer3(struct frame *fr,unsigned char *pcm_sample,int *pcm_point)
+{
+  int gr, ch, ss,clip=0;
+  int scalefacs[2][39]; /* max 39 for short[13][3] mode, mixed: 38, long: 22 */
+  struct III_sideinfo sideinfo;
+  int stereo = fr->stereo;
+  int single = fr->single;
+  int ms_stereo,i_stereo;
+  int sfreq = fr->sampling_frequency;
+  int stereo1,granules;
+
+  if(stereo == 1) { /* stream is mono */
+    stereo1 = 1;
+    single = 0;
+  }
+  else if(single >= 0) /* stream is stereo, but force to mono */
+    stereo1 = 1;
+  else
+    stereo1 = 2;
+
+  if(fr->mode == MPG_MD_JOINT_STEREO) {
+    ms_stereo = fr->mode_ext & 0x2;
+    i_stereo  = fr->mode_ext & 0x1;
+  }
+  else
+    ms_stereo = i_stereo = 0;
+
+  if(fr->lsf) {
+    granules = 1;
+    if(!III_get_side_info_2(&sideinfo,stereo,ms_stereo,sfreq,single))
+      return -1;
+  }
+  else {
+    granules = 2;
+#ifdef MPEG1
+    if(!III_get_side_info_1(&sideinfo,stereo,ms_stereo,sfreq,single))
+      return -1;
+#else
+    fprintf(stderr,"Not supported\n");
+#endif
+  }
+
+  if(set_pointer(sideinfo.main_data_begin) == MP3_ERR)
+    return -1;
+
+  for (gr=0;gr<granules;gr++) 
+  {
+    real hybridIn[2][SBLIMIT][SSLIMIT];
+    real hybridOut[2][SSLIMIT][SBLIMIT];
+
+    {
+      struct gr_info_s *gr_info = &(sideinfo.ch[0].gr[gr]);
+      long part2bits;
+      if(fr->lsf)
+        part2bits = III_get_scale_factors_2(scalefacs[0],gr_info,0);
+      else {
+#ifdef MPEG1
+        part2bits = III_get_scale_factors_1(scalefacs[0],gr_info);
+#else
+	fprintf(stderr,"Not supported\n");
+#endif
+      }
+      if(III_dequantize_sample(hybridIn[0], scalefacs[0],gr_info,sfreq,part2bits))
+        return clip;
+    }
+    if(stereo == 2) {
+      struct gr_info_s *gr_info = &(sideinfo.ch[1].gr[gr]);
+      long part2bits;
+      if(fr->lsf) 
+        part2bits = III_get_scale_factors_2(scalefacs[1],gr_info,i_stereo);
+      else {
+#ifdef MPEG1
+        part2bits = III_get_scale_factors_1(scalefacs[1],gr_info);
+#else
+	fprintf(stderr,"Not supported\n");
+#endif
+      }
+
+      if(III_dequantize_sample(hybridIn[1],scalefacs[1],gr_info,sfreq,part2bits))
+          return clip;
+
+      if(ms_stereo) {
+        int i;
+        for(i=0;i<SBLIMIT*SSLIMIT;i++) {
+          real tmp0,tmp1;
+          tmp0 = ((real *) hybridIn[0])[i];
+          tmp1 = ((real *) hybridIn[1])[i];
+          ((real *) hybridIn[0])[i] = tmp0 + tmp1;
+          ((real *) hybridIn[1])[i] = tmp0 - tmp1;  
+        }
+      }
+
+      if(i_stereo)
+        III_i_stereo(hybridIn,scalefacs[1],gr_info,sfreq,ms_stereo,fr->lsf);
+
+      if(ms_stereo || i_stereo || (single == 3) ) {
+        if(gr_info->maxb > sideinfo.ch[0].gr[gr].maxb) 
+          sideinfo.ch[0].gr[gr].maxb = gr_info->maxb;
+        else
+          gr_info->maxb = sideinfo.ch[0].gr[gr].maxb;
+      }
+
+      switch(single) {
+        case 3:
+          {
+            register int i;
+            register real *in0 = (real *) hybridIn[0],*in1 = (real *) hybridIn[1];
+            for(i=0;i<SSLIMIT*gr_info->maxb;i++,in0++)
+              *in0 = (*in0 + *in1++); /* *0.5 done by pow-scale */ 
+          }
+          break;
+        case 1:
+          {
+            register int i;
+            register real *in0 = (real *) hybridIn[0],*in1 = (real *) hybridIn[1];
+            for(i=0;i<SSLIMIT*gr_info->maxb;i++)
+              *in0++ = *in1++;
+          }
+          break;
+      }
+    }
+
+    for(ch=0;ch<stereo1;ch++) {
+      struct gr_info_s *gr_info = &(sideinfo.ch[ch].gr[gr]);
+      III_antialias(hybridIn[ch],gr_info);
+      III_hybrid(hybridIn[ch], hybridOut[ch], ch,gr_info);
+    }
+
+    for(ss=0;ss<SSLIMIT;ss++) {
+      if(single >= 0) {
+        clip += synth_1to1_mono(hybridOut[0][ss],pcm_sample,pcm_point);
+      }
+      else {
+        int p1 = *pcm_point;
+        clip += synth_1to1(hybridOut[0][ss],0,pcm_sample,&p1);
+        clip += synth_1to1(hybridOut[1][ss],1,pcm_sample,pcm_point);
+      }
+    }
+  }
+  
+  return clip;
+}
+
+