+++ /dev/null
-/*
- layer3.c: the layer 3 decoder
-
- copyright 1995-2017 by the mpg123 project - free software under the terms of the LGPL 2.1
- see COPYING and AUTHORS files in distribution or http://mpg123.org
- initially written by Michael Hipp
-
- Dear visitor:
- If you feel you don't understand fully the works of this file, your feeling might be correct.
-
- Optimize-TODO: put short bands into the band-field without the stride of 3 reals
- Length-optimze: unify long and short band code where it is possible
-
- The int-vs-pointer situation has to be cleaned up.
-*/
-
-#include "mpg123lib_intern.h"
-#ifdef USE_NEW_HUFFTABLE
-#include "newhuffman.h"
-#else
-#include "huffman.h"
-#endif
-#include "getbits.h"
-#include "debug.h"
-
-
-
-/* define CUT_SFB21 if you want to cut-off the frequency above 16kHz */
-#if 0
-#define CUT_SFB21
-#endif
-
-#ifdef REAL_IS_FIXED
-#define NEW_DCT9
-#include "l3_integer_tables.h"
-#else
-/* static one-time calculated tables... or so */
-static real ispow[8207];
-static real aa_ca[8],aa_cs[8];
-static ALIGNED(16) real win[4][36];
-static ALIGNED(16) real win1[4][36];
-real COS9[9]; /* dct36_3dnow wants to use that */
-static real COS6_1,COS6_2;
-real tfcos36[9]; /* dct36_3dnow wants to use that */
-static real tfcos12[3];
-#define NEW_DCT9
-#ifdef NEW_DCT9
-static real cos9[3],cos18[3];
-static real tan1_1[16],tan2_1[16],tan1_2[16],tan2_2[16];
-static real pow1_1[2][32],pow2_1[2][32],pow1_2[2][32],pow2_2[2][32];
-#endif
-#endif
-
-/* Decoder state data, living on the stack of do_layer3. */
-
-struct gr_info_s
-{
- int scfsi;
- unsigned part2_3_length;
- unsigned big_values;
- unsigned scalefac_compress;
- unsigned block_type;
- unsigned mixed_block_flag;
- unsigned table_select[3];
- /* Making those two signed int as workaround for open64/pathscale/sun compilers, and also for consistency, since they're worked on together with other signed variables. */
- int maxband[3];
- int maxbandl;
- unsigned maxb;
- unsigned region1start;
- unsigned region2start;
- unsigned preflag;
- unsigned scalefac_scale;
- unsigned count1table_select;
- real *full_gain[3];
- real *pow2gain;
-};
-
-struct III_sideinfo
-{
- unsigned main_data_begin;
- unsigned private_bits;
- /* Hm, funny... struct inside struct... */
- struct { struct gr_info_s gr[2]; } ch[2];
-};
-
-struct bandInfoStruct
-{
- unsigned short longIdx[23];
- unsigned char longDiff[22];
- unsigned short shortIdx[14];
- unsigned char shortDiff[13];
-};
-
-/* Techy details about our friendly MPEG data. Fairly constant over the years;-) */
-static const 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 }
- },
- { /* Twiddling 3 values here (not just 330->332!) fixed bug 1895025. */
- {0,6,12,18,24,30,36,44,54,66,80,96,114,136,162,194,232,278,332,394,464,540,576},
- {6,6,6,6,6,6,8,10,12,14,16,18,22,26,32,38,46,54,62,70,76,36 },
- {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 */
-
-/* Some helpers used in init_layer3 */
-
-#ifdef OPT_MMXORSSE
-real init_layer3_gainpow2_mmx(mpg123_handle *fr, int i)
-{
- if(!fr->p.down_sample) return DOUBLE_TO_REAL(16384.0 * pow((double)2.0,-0.25 * (double) (i+210) ));
- else return DOUBLE_TO_REAL(pow((double)2.0,-0.25 * (double) (i+210)));
-}
-#endif
-
-real init_layer3_gainpow2(mpg123_handle *fr, int i)
-{
-#if defined(REAL_IS_FIXED) && defined(PRECALC_TABLES)
- return gainpow2[i+256];
-#else
- return DOUBLE_TO_REAL_SCALE_LAYER3(pow((double)2.0,-0.25 * (double) (i+210)),i+256);
-#endif
-}
-
-
-/* init tables for layer-3 ... specific with the downsampling... */
-void init_layer3(void)
-{
- int i,j,k,l;
-
-#if !defined(REAL_IS_FIXED) || !defined(PRECALC_TABLES)
- for(i=0;i<8207;i++)
- ispow[i] = DOUBLE_TO_REAL_POW43(pow((double)i,(double)4.0/3.0));
-
- for(i=0;i<8;i++)
- {
- const 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] = DOUBLE_TO_REAL(1.0/sq);
- aa_ca[i] = DOUBLE_TO_REAL(Ci[i]/sq);
- }
-
- for(i=0;i<18;i++)
- {
- win[0][i] = win[1][i] =
- DOUBLE_TO_REAL( 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] =
- DOUBLE_TO_REAL( 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] = DOUBLE_TO_REAL(0.5 / cos ( M_PI * (double) (2*(i+18)+19) / 72.0 ));
- win[3][i+12] = DOUBLE_TO_REAL(0.5 / cos ( M_PI * (double) (2*(i+12)+19) / 72.0 ));
- win[1][i+24] = DOUBLE_TO_REAL(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] = DOUBLE_TO_REAL(0.0);
- win[3][i+6 ] = DOUBLE_TO_REAL(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] = DOUBLE_TO_REAL(cos( M_PI / 18.0 * (double) i));
-
- for(i=0;i<9;i++)
- tfcos36[i] = DOUBLE_TO_REAL(0.5 / cos ( M_PI * (double) (i*2+1) / 36.0 ));
-
- for(i=0;i<3;i++)
- tfcos12[i] = DOUBLE_TO_REAL(0.5 / cos ( M_PI * (double) (i*2+1) / 12.0 ));
-
- COS6_1 = DOUBLE_TO_REAL(cos( M_PI / 6.0 * (double) 1));
- COS6_2 = DOUBLE_TO_REAL(cos( M_PI / 6.0 * (double) 2));
-
-#ifdef NEW_DCT9
- cos9[0] = DOUBLE_TO_REAL(cos(1.0*M_PI/9.0));
- cos9[1] = DOUBLE_TO_REAL(cos(5.0*M_PI/9.0));
- cos9[2] = DOUBLE_TO_REAL(cos(7.0*M_PI/9.0));
- cos18[0] = DOUBLE_TO_REAL(cos(1.0*M_PI/18.0));
- cos18[1] = DOUBLE_TO_REAL(cos(11.0*M_PI/18.0));
- cos18[2] = DOUBLE_TO_REAL(cos(13.0*M_PI/18.0));
-#endif
-
- for(i=0;i<12;i++)
- {
- win[2][i] = DOUBLE_TO_REAL(0.5 * sin( M_PI / 24.0 * (double) (2*i+1) ) / cos ( M_PI * (double) (2*i+7) / 24.0 ));
- }
-
- for(i=0;i<16;i++)
- {
- double t = tan( (double) i * M_PI / 12.0 );
- tan1_1[i] = DOUBLE_TO_REAL_15(t / (1.0+t));
- tan2_1[i] = DOUBLE_TO_REAL_15(1.0 / (1.0 + t));
- tan1_2[i] = DOUBLE_TO_REAL_15(M_SQRT2 * t / (1.0+t));
- tan2_2[i] = DOUBLE_TO_REAL_15(M_SQRT2 / (1.0 + t));
- }
-
- for(i=0;i<32;i++)
- {
- 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] = DOUBLE_TO_REAL_15(p1);
- pow2_1[j][i] = DOUBLE_TO_REAL_15(p2);
- pow1_2[j][i] = DOUBLE_TO_REAL_15(M_SQRT2 * p1);
- pow2_2[j][i] = DOUBLE_TO_REAL_15(M_SQRT2 * p2);
- }
- }
-#endif
-
- for(j=0;j<4;j++)
- {
- const 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(j=0;j<9;j++)
- {
- const struct bandInfoStruct *bi = &bandInfo[j];
- int *mp;
- int cb,lwin;
- const unsigned char *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;
- }
-
- /* Now for some serious loopings! */
- 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);
- }
-}
-
-
-void init_layer3_stuff(mpg123_handle *fr, real (*gainpow2)(mpg123_handle *fr, int i))
-{
- int i,j;
-
- for(i=-256;i<118+4;i++) fr->gainpow2[i+256] = gainpow2(fr,i);
-
- for(j=0;j<9;j++)
- {
- for(i=0;i<23;i++)
- {
- fr->longLimit[j][i] = (bandInfo[j].longIdx[i] - 1 + 8) / 18 + 1;
- if(fr->longLimit[j][i] > (fr->down_sample_sblimit) )
- fr->longLimit[j][i] = fr->down_sample_sblimit;
- }
- for(i=0;i<14;i++)
- {
- fr->shortLimit[j][i] = (bandInfo[j].shortIdx[i] - 1) / 18 + 1;
- if(fr->shortLimit[j][i] > (fr->down_sample_sblimit) )
- fr->shortLimit[j][i] = fr->down_sample_sblimit;
- }
- }
-}
-
-/*
- Observe!
- Now come the actualy decoding routines.
-*/
-
-/* read additional side information (for MPEG 1 and MPEG 2) */
-static int III_get_side_info(mpg123_handle *fr, struct III_sideinfo *si,int stereo, int ms_stereo,long sfreq,int single)
-{
- int ch, gr;
- int powdiff = (single == SINGLE_MIX) ? 4 : 0;
-
- const int tabs[2][5] = { { 2,9,5,3,4 } , { 1,8,1,2,9 } };
- const int *tab = tabs[fr->lsf];
-
- si->main_data_begin = getbits(fr, tab[1]);
-
- if(si->main_data_begin > fr->bitreservoir)
- {
- if(!fr->to_ignore && VERBOSE2) fprintf(stderr, "Note: missing %d bytes in bit reservoir for frame %li\n", (int)(si->main_data_begin - fr->bitreservoir), (long)fr->num);
-
- /* overwrite main_data_begin for the really available bit reservoir */
- backbits(fr, tab[1]);
- if(fr->lsf == 0)
- {
- fr->wordpointer[0] = (unsigned char) (fr->bitreservoir >> 1);
- fr->wordpointer[1] = (unsigned char) ((fr->bitreservoir & 1) << 7);
- }
- else fr->wordpointer[0] = (unsigned char) fr->bitreservoir;
-
- /* zero "side-info" data for a silence-frame
- without touching audio data used as bit reservoir for following frame */
- memset(fr->wordpointer+2, 0, fr->ssize-2);
-
- /* reread the new bit reservoir offset */
- si->main_data_begin = getbits(fr, tab[1]);
- }
-
- /* Keep track of the available data bytes for the bit reservoir.
- Think: Substract the 2 crc bytes in parser already? */
- fr->bitreservoir = fr->bitreservoir + fr->framesize - fr->ssize - (fr->error_protection ? 2 : 0);
- /* Limit the reservoir to the max for MPEG 1.0 or 2.x . */
- if(fr->bitreservoir > (unsigned int) (fr->lsf == 0 ? 511 : 255))
- fr->bitreservoir = (fr->lsf == 0 ? 511 : 255);
-
- /* Now back into less commented territory. It's code. It works. */
-
- if (stereo == 1)
- si->private_bits = getbits_fast(fr, tab[2]);
- else
- si->private_bits = getbits_fast(fr, tab[3]);
-
- if(!fr->lsf) for(ch=0; ch<stereo; ch++)
- {
- si->ch[ch].gr[0].scfsi = -1;
- si->ch[ch].gr[1].scfsi = getbits_fast(fr, 4);
- }
-
- for (gr=0; gr<tab[0]; 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(fr, 12);
- gr_info->big_values = getbits(fr, 9);
- if(gr_info->big_values > 288)
- {
- if(NOQUIET) error("big_values too large!");
- gr_info->big_values = 288;
- }
- gr_info->pow2gain = fr->gainpow2+256 - getbits_fast(fr, 8) + powdiff;
- if(ms_stereo) gr_info->pow2gain += 2;
-
- gr_info->scalefac_compress = getbits(fr, tab[4]);
-
- if(get1bit(fr))
- { /* window switch flag */
- int i;
- gr_info->block_type = getbits_fast(fr, 2);
- gr_info->mixed_block_flag = get1bit(fr);
- gr_info->table_select[0] = getbits_fast(fr, 5);
- gr_info->table_select[1] = getbits_fast(fr, 5);
- /*
- table_select[2] not needed, because there is no region2,
- but to satisfy some verification 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(fr, 3)<<3);
-
- if(gr_info->block_type == 0)
- {
- if(NOQUIET) error("Blocktype == 0 and window-switching == 1 not allowed.");
- return 1;
- }
-
- /* region_count/start parameters are implicit in this case. */
- if( (!fr->lsf || (gr_info->block_type == 2)) && !fr->mpeg25)
- {
- gr_info->region1start = 36>>1;
- gr_info->region2start = 576>>1;
- }
- else
- {
- if(fr->mpeg25)
- {
- int r0c,r1c;
- if((gr_info->block_type == 2) && (!gr_info->mixed_block_flag) ) r0c = 5;
- else r0c = 7;
-
- /* r0c+1+r1c+1 == 22, always. */
- r1c = 20 - r0c;
- gr_info->region1start = bandInfo[sfreq].longIdx[r0c+1] >> 1 ;
- gr_info->region2start = bandInfo[sfreq].longIdx[r0c+1+r1c+1] >> 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(fr, 5);
-
- r0c = getbits_fast(fr, 4); /* 0 .. 15 */
- r1c = getbits_fast(fr, 3); /* 0 .. 7 */
- gr_info->region1start = bandInfo[sfreq].longIdx[r0c+1] >> 1 ;
-
- /* max(r0c+r1c+2) = 15+7+2 = 24 */
- if(r0c+1+r1c+1 > 22) gr_info->region2start = 576>>1;
- else gr_info->region2start = bandInfo[sfreq].longIdx[r0c+1+r1c+1] >> 1;
-
- gr_info->block_type = 0;
- gr_info->mixed_block_flag = 0;
- }
- if(!fr->lsf) gr_info->preflag = get1bit(fr);
-
- gr_info->scalefac_scale = get1bit(fr);
- gr_info->count1table_select = get1bit(fr);
- }
- return 0;
-}
-
-
-/* read scalefactors */
-static int III_get_scale_factors_1(mpg123_handle *fr, int *scf,struct gr_info_s *gr_info,int ch,int gr)
-{
- 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(fr, num0);
-
- i = 9;
- numbits -= num0; /* num0 * 17 + num1 * 18 */
- }
-
- for(;i;i--) *scf++ = getbits_fast(fr, num0);
-
- for(i = 18; i; i--) *scf++ = getbits_fast(fr, 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(fr, num0);
-
- for(i=10;i;i--) *scf++ = getbits_fast(fr, num1);
-
- numbits = (num0 + num1) * 10 + num0;
- *scf++ = 0;
- }
- else
- {
- numbits = 0;
- if(!(scfsi & 0x8))
- {
- for (i=0;i<6;i++) *scf++ = getbits_fast(fr, num0);
-
- numbits += num0 * 6;
- }
- else scf += 6;
-
- if(!(scfsi & 0x4))
- {
- for (i=0;i<5;i++) *scf++ = getbits_fast(fr, num0);
-
- numbits += num0 * 5;
- }
- else scf += 5;
-
- if(!(scfsi & 0x2))
- {
- for(i=0;i<5;i++) *scf++ = getbits_fast(fr, num1);
-
- numbits += num1 * 5;
- }
- else scf += 5;
-
- if(!(scfsi & 0x1))
- {
- for (i=0;i<5;i++) *scf++ = getbits_fast(fr, num1);
-
- numbits += num1 * 5;
- }
- else scf += 5;
-
- *scf++ = 0; /* no l[21] in original sources */
- }
- }
- return numbits;
-}
-
-
-static int III_get_scale_factors_2(mpg123_handle *fr, int *scf,struct gr_info_s *gr_info,int i_stereo)
-{
- const unsigned char *pnt;
- int i,j,n=0,numbits=0;
- unsigned int slen;
-
- const 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(fr, 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 unsigned char pretab_choice[2][22] =
-{
- {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},
- {0,0,0,0,0,0,0,0,0,0,0,1,1,1,1,2,2,3,3,3,2,0}
-};
-
-/*
- Dequantize samples
- ...includes Huffman decoding
-*/
-
-/* 24 is enough because tab13 has max. a 19 bit huffvector */
-/* The old code played games with shifting signed integers around in not quite */
-/* legal ways. Also, it used long where just 32 bits are required. This could */
-/* be good or bad on 64 bit architectures ... anyway, making clear that */
-/* 32 bits suffice is a benefit. */
-#if 0
-/* To reconstruct old code, use this: */
-#define MASK_STYPE long
-#define MASK_UTYPE unsigned long
-#define MASK_TYPE MASK_STYPE
-#define MSB_MASK (mask < 0)
-#else
-/* This should be more proper: */
-#define MASK_STYPE int32_t
-#define MASK_UTYPE uint32_t
-#define MASK_TYPE MASK_UTYPE
-#define MSB_MASK ((MASK_UTYPE)mask & (MASK_UTYPE)1<<(sizeof(MASK_TYPE)*8-1))
-#endif
-#define BITSHIFT ((sizeof(MASK_TYPE)-1)*8)
-#define REFRESH_MASK \
- while(num < BITSHIFT) { \
- mask |= ((MASK_UTYPE)getbyte(fr))<<(BITSHIFT-num); \
- num += 8; \
- part2remain -= 8; }
-/* Complicated way of checking for msb value. This used to be (mask < 0). */
-
-static int III_dequantize_sample(mpg123_handle *fr, 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;
-#ifdef REAL_IS_FIXED
- int gainpow2_scale_idx = 378;
-#endif
-
- /* mhipp tree has this split up a bit... */
- int num=getbitoffset(fr);
- MASK_TYPE mask;
- /* We must split this, because for num==0 the shift is undefined if you do it in one step. */
- mask = ((MASK_UTYPE) getbits(fr, num))<<BITSHIFT;
- mask <<= 8-num;
- part2remain -= num;
-
- {
- 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;
- }
- }
- }
-
-#define CHECK_XRPNT if(xrpnt >= &xr[SBLIMIT][0]) \
-{ \
- if(NOQUIET) \
- error2("attempted xrpnt overflow (%p !< %p)", (void*) xrpnt, (void*) &xr[SBLIMIT][0]); \
- return 1; \
-}
-
- if(gr_info->block_type == 2)
- {
- /* decoding with short or mixed mode BandIndex table */
- int i,max[4];
- int step=0,lwin=3,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];
- const struct newhuff *h = ht+gr_info->table_select[i];
- for(;lp;lp--,mc--)
- {
- register MASK_STYPE x,y;
- if( (!mc) )
- {
- mc = *m++;
- xrpnt = ((real *) xr) + (*m++);
- lwin = *m++;
- cb = *m++;
- if(lwin == 3)
- {
-#ifdef REAL_IS_FIXED
- gainpow2_scale_idx = (int)(gr_info->pow2gain + (*scf << shift) - fr->gainpow2);
-#endif
- v = gr_info->pow2gain[(*scf++) << shift];
- step = 1;
- }
- else
- {
-#ifdef REAL_IS_FIXED
- gainpow2_scale_idx = (int)(gr_info->full_gain[lwin] + (*scf << shift) - fr->gainpow2);
-#endif
- v = gr_info->full_gain[lwin][(*scf++) << shift];
- step = 3;
- }
- }
- {
- const short *val = h->table;
- REFRESH_MASK;
-#ifdef USE_NEW_HUFFTABLE
- while((y=val[(MASK_UTYPE)mask>>(BITSHIFT+4)])<0)
- {
- val -= y;
- num -= 4;
- mask <<= 4;
- }
- num -= (y >> 8);
- mask <<= (y >> 8);
- x = (y >> 4) & 0xf;
- y &= 0xf;
-#else
- while((y=*val++)<0)
- {
- if (MSB_MASK) val -= y;
-
- num--;
- mask <<= 1;
- }
- x = y >> 4;
- y &= 0xf;
-#endif
- }
- CHECK_XRPNT;
- if(x == 15 && h->linbits)
- {
- max[lwin] = cb;
- REFRESH_MASK;
- x += ((MASK_UTYPE) mask) >> (BITSHIFT+8-h->linbits);
- num -= h->linbits+1;
- mask <<= h->linbits;
- if(MSB_MASK) *xrpnt = REAL_MUL_SCALE_LAYER3(-ispow[x], v, gainpow2_scale_idx);
- else *xrpnt = REAL_MUL_SCALE_LAYER3( ispow[x], v, gainpow2_scale_idx);
-
- mask <<= 1;
- }
- else if(x)
- {
- max[lwin] = cb;
- if(MSB_MASK) *xrpnt = REAL_MUL_SCALE_LAYER3(-ispow[x], v, gainpow2_scale_idx);
- else *xrpnt = REAL_MUL_SCALE_LAYER3( ispow[x], v, gainpow2_scale_idx);
-
- num--;
- mask <<= 1;
- }
- else *xrpnt = DOUBLE_TO_REAL(0.0);
-
- xrpnt += step;
- CHECK_XRPNT;
- if(y == 15 && h->linbits)
- {
- max[lwin] = cb;
- REFRESH_MASK;
- y += ((MASK_UTYPE) mask) >> (BITSHIFT+8-h->linbits);
- num -= h->linbits+1;
- mask <<= h->linbits;
- if(MSB_MASK) *xrpnt = REAL_MUL_SCALE_LAYER3(-ispow[y], v, gainpow2_scale_idx);
- else *xrpnt = REAL_MUL_SCALE_LAYER3( ispow[y], v, gainpow2_scale_idx);
-
- mask <<= 1;
- }
- else if(y)
- {
- max[lwin] = cb;
- if(MSB_MASK) *xrpnt = REAL_MUL_SCALE_LAYER3(-ispow[y], v, gainpow2_scale_idx);
- else *xrpnt = REAL_MUL_SCALE_LAYER3( ispow[y], v, gainpow2_scale_idx);
-
- num--;
- mask <<= 1;
- }
- else *xrpnt = DOUBLE_TO_REAL(0.0);
-
- xrpnt += step;
- }
- }
-
- for(;l3 && (part2remain+num > 0);l3--)
- {
- const struct newhuff* h;
- const short* val;
- register short a;
-
- h = htc+gr_info->count1table_select;
- val = h->table;
-
- REFRESH_MASK;
- while((a=*val++)<0)
- {
- if(MSB_MASK) val -= a;
-
- num--;
- mask <<= 1;
- }
- if(part2remain+num <= 0)
- {
- num -= part2remain+num;
- break;
- }
-
- for(i=0;i<4;i++)
- {
- if(!(i & 1))
- {
- if(!mc)
- {
- mc = *m++;
- xrpnt = ((real *) xr) + (*m++);
- lwin = *m++;
- cb = *m++;
- if(lwin == 3)
- {
-#ifdef REAL_IS_FIXED
- gainpow2_scale_idx = (int)(gr_info->pow2gain + (*scf << shift) - fr->gainpow2);
-#endif
- v = gr_info->pow2gain[(*scf++) << shift];
- step = 1;
- }
- else
- {
-#ifdef REAL_IS_FIXED
- gainpow2_scale_idx = (int)(gr_info->full_gain[lwin] + (*scf << shift) - fr->gainpow2);
-#endif
- v = gr_info->full_gain[lwin][(*scf++) << shift];
- step = 3;
- }
- }
- mc--;
- }
- CHECK_XRPNT;
- if( (a & (0x8>>i)) )
- {
- max[lwin] = cb;
- if(part2remain+num <= 0)
- break;
-
- if(MSB_MASK) *xrpnt = -REAL_SCALE_LAYER3(v, gainpow2_scale_idx);
- else *xrpnt = REAL_SCALE_LAYER3(v, gainpow2_scale_idx);
-
- num--;
- mask <<= 1;
- }
- else *xrpnt = DOUBLE_TO_REAL(0.0);
-
- xrpnt += step;
- }
- }
-
- if(lwin < 3)
- { /* short band? */
- while(1)
- {
- for(;mc > 0;mc--)
- {
- CHECK_XRPNT;
- *xrpnt = DOUBLE_TO_REAL(0.0); xrpnt += 3; /* short band -> step=3 */
- *xrpnt = DOUBLE_TO_REAL(0.0); xrpnt += 3;
- }
- if(m >= me)
- break;
-
- mc = *m++;
- xrpnt = ((real *) xr) + *m++;
- if(*m++ == 0)
- break; /* optimize: field will be set to zero at the end of the function */
-
- m++; /* cb */
- }
- }
-
- 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 ? fr->shortLimit[sfreq][rmax] : fr->longLimit[sfreq][max[3]+1];
- }
-
- }
- else
- {
- /* decoding with 'long' BandIndex table (block_type != 2) */
- const unsigned char *pretab = pretab_choice[gr_info->preflag];
- int i,max = -1;
- int cb = 0;
- int *m = map[sfreq][2];
- register real v = 0.0;
- int mc = 0;
-
- /* long hash table values */
- for(i=0;i<3;i++)
- {
- int lp = l[i];
- const struct newhuff *h = ht+gr_info->table_select[i];
-
- for(;lp;lp--,mc--)
- {
- MASK_STYPE x,y;
- if(!mc)
- {
- mc = *m++;
- cb = *m++;
-#ifdef CUT_SFB21
- if(cb == 21)
- v = 0.0;
- else
-#endif
- {
-#ifdef REAL_IS_FIXED
- gainpow2_scale_idx = (int)(gr_info->pow2gain + (*scf << shift) - fr->gainpow2);
-#endif
- v = gr_info->pow2gain[(*(scf++) + (*pretab++)) << shift];
- }
- }
- {
- const short *val = h->table;
- REFRESH_MASK;
-#ifdef USE_NEW_HUFFTABLE
- while((y=val[(MASK_UTYPE)mask>>(BITSHIFT+4)])<0)
- {
- val -= y;
- num -= 4;
- mask <<= 4;
- }
- num -= (y >> 8);
- mask <<= (y >> 8);
- x = (y >> 4) & 0xf;
- y &= 0xf;
-#else
- while((y=*val++)<0)
- {
- if (MSB_MASK) val -= y;
-
- num--;
- mask <<= 1;
- }
- x = y >> 4;
- y &= 0xf;
-#endif
- }
-
- CHECK_XRPNT;
- if(x == 15 && h->linbits)
- {
- max = cb;
- REFRESH_MASK;
- x += ((MASK_UTYPE) mask) >> (BITSHIFT+8-h->linbits);
- num -= h->linbits+1;
- mask <<= h->linbits;
- if(MSB_MASK) *xrpnt++ = REAL_MUL_SCALE_LAYER3(-ispow[x], v, gainpow2_scale_idx);
- else *xrpnt++ = REAL_MUL_SCALE_LAYER3( ispow[x], v, gainpow2_scale_idx);
-
- mask <<= 1;
- }
- else if(x)
- {
- max = cb;
- if(MSB_MASK) *xrpnt++ = REAL_MUL_SCALE_LAYER3(-ispow[x], v, gainpow2_scale_idx);
- else *xrpnt++ = REAL_MUL_SCALE_LAYER3( ispow[x], v, gainpow2_scale_idx);
- num--;
-
- mask <<= 1;
- }
- else *xrpnt++ = DOUBLE_TO_REAL(0.0);
-
- CHECK_XRPNT;
- if(y == 15 && h->linbits)
- {
- max = cb;
- REFRESH_MASK;
- y += ((MASK_UTYPE) mask) >> (BITSHIFT+8-h->linbits);
- num -= h->linbits+1;
- mask <<= h->linbits;
- if(MSB_MASK) *xrpnt++ = REAL_MUL_SCALE_LAYER3(-ispow[y], v, gainpow2_scale_idx);
- else *xrpnt++ = REAL_MUL_SCALE_LAYER3( ispow[y], v, gainpow2_scale_idx);
-
- mask <<= 1;
- }
- else if(y)
- {
- max = cb;
- if(MSB_MASK) *xrpnt++ = REAL_MUL_SCALE_LAYER3(-ispow[y], v, gainpow2_scale_idx);
- else *xrpnt++ = REAL_MUL_SCALE_LAYER3( ispow[y], v, gainpow2_scale_idx);
-
- num--;
- mask <<= 1;
- }
- else *xrpnt++ = DOUBLE_TO_REAL(0.0);
- }
- }
-
- /* short (count1table) values */
- for(;l3 && (part2remain+num > 0);l3--)
- {
- const struct newhuff *h = htc+gr_info->count1table_select;
- const short *val = h->table;
- register short a;
-
- REFRESH_MASK;
- while((a=*val++)<0)
- {
- if (MSB_MASK) val -= a;
-
- num--;
- mask <<= 1;
- }
- if(part2remain+num <= 0)
- {
- num -= part2remain+num;
- break;
- }
-
- for(i=0;i<4;i++)
- {
- if(!(i & 1))
- {
- if(!mc)
- {
- mc = *m++;
- cb = *m++;
-#ifdef CUT_SFB21
- if(cb == 21)
- v = 0.0;
- else
-#endif
- {
-#ifdef REAL_IS_FIXED
- gainpow2_scale_idx = (int)(gr_info->pow2gain + (*scf << shift) - fr->gainpow2);
-#endif
- v = gr_info->pow2gain[((*scf++) + (*pretab++)) << shift];
- }
- }
- mc--;
- }
- CHECK_XRPNT;
- if( (a & (0x8>>i)) )
- {
- max = cb;
- if(part2remain+num <= 0)
- break;
-
- if(MSB_MASK) *xrpnt++ = -REAL_SCALE_LAYER3(v, gainpow2_scale_idx);
- else *xrpnt++ = REAL_SCALE_LAYER3(v, gainpow2_scale_idx);
-
- num--;
- mask <<= 1;
- }
- else *xrpnt++ = DOUBLE_TO_REAL(0.0);
- }
- }
-
- gr_info->maxbandl = max+1;
- gr_info->maxb = fr->longLimit[sfreq][gr_info->maxbandl];
- }
-
- part2remain += num;
- backbits(fr, num);
- num = 0;
-
- while(xrpnt < &xr[SBLIMIT][0])
- *xrpnt++ = DOUBLE_TO_REAL(0.0);
-
- while( part2remain > 16 )
- {
- skipbits(fr, 16); /* Dismiss stuffing Bits */
- part2remain -= 16;
- }
- if(part2remain > 0) skipbits(fr, part2remain);
- else if(part2remain < 0)
- {
- debug1("Can't rewind stream by %d bits!",-part2remain);
- return 1; /* -> error */
- }
- return 0;
-}
-
-
-/* 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;
- const struct bandInfoStruct *bi = &bandInfo[sfreq];
-
- const real *tab1,*tab2;
-
-#if 1
- int tab;
-/* TODO: optimize as static */
- const real *tabs[3][2][2] =
- {
- { { tan1_1,tan2_1 } , { tan1_2,tan2_2 } },
- { { pow1_1[0],pow2_1[0] } , { pow1_2[0],pow2_2[0] } },
- { { pow1_1[1],pow2_1[1] } , { pow1_2[1],pow2_2[1] } }
- };
-
- tab = lsf + (gr_info->scalefac_compress & lsf);
- tab1 = tabs[tab][ms_stereo][0];
- tab2 = tabs[tab][ms_stereo][1];
-#else
- 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;
- }
- }
-#endif
-
- 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] = REAL_MUL_15(v, t1);
- xr[1][idx] = REAL_MUL_15(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] = REAL_MUL_15(v, t1);
- xr[1][idx] = REAL_MUL_15(v, t2);
- }
- }
- } /* end for(lwin; .. ; . ) */
-
- /* also check l-part, if ALL bands in the three windows are 'empty' and mode = mixed_mode */
- if(do_l)
- {
- int sfb = gr_info->maxbandl;
- int idx;
- if(sfb > 21) return; /* similarity fix related to CVE-2006-1655 */
-
- 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] = REAL_MUL_15(v, t1);
- xr[1][idx] = REAL_MUL_15(v, t2);
- }
- }
- else idx += sb;
- }
- }
- }
- else
- { /* ((gr_info->block_type != 2)) */
- int sfb = gr_info->maxbandl;
- int is_p,idx;
- if(sfb > 21) return; /* tightened fix for CVE-2006-1655 */
-
- 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] = REAL_MUL_15(v, t1);
- xr[1][idx] = REAL_MUL_15(v, t2);
- }
- }
- else idx += sb;
- }
-
- is_p = scalefac[20];
- if(is_p != 7)
- { /* copy l-band 20 to l-band 21 */
- 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] = REAL_MUL_15(v, t1);
- xr[1][idx] = REAL_MUL_15(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 = REAL_MUL(bu, *cs) - REAL_MUL(bd, *ca);
- *xr1++ = REAL_MUL(bd, *cs++) + REAL_MUL(bu, *ca++);
- }
- }
- }
-}
-
-/*
- This is an optimized DCT from Jeff Tsay's maplay 1.2+ package.
- Saved one multiplication by doing the 'twiddle factor' stuff
- together with the window mul. (MH)
-
- This uses Byeong Gi Lee's Fast Cosine Transform algorithm, but the
- 9 point IDCT needs to be reduced further. Unfortunately, I don't
- know how to do that, because 9 is not an even number. - Jeff.
-
- Original Message:
-
- 9 Point Inverse Discrete Cosine Transform
-
- This piece of code is Copyright 1997 Mikko Tommila and is freely usable
- by anybody. The algorithm itself is of course in the public domain.
-
- Again derived heuristically from the 9-point WFTA.
-
- The algorithm is optimized (?) for speed, not for small rounding errors or
- good readability.
-
- 36 additions, 11 multiplications
-
- Again this is very likely sub-optimal.
-
- The code is optimized to use a minimum number of temporary variables,
- so it should compile quite well even on 8-register Intel x86 processors.
- This makes the code quite obfuscated and very difficult to understand.
-
- References:
- [1] S. Winograd: "On Computing the Discrete Fourier Transform",
- Mathematics of Computation, Volume 32, Number 141, January 1978,
- Pages 175-199
-*/
-
-/* Calculation of the inverse MDCT
- used to be static without 3dnow - does that really matter? */
-void dct36(real *inbuf,real *o1,real *o2,real *wintab,real *tsbuf)
-{
-#ifdef NEW_DCT9
- real tmp[18];
-#endif
-
- {
- 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];
-
-
-#ifdef NEW_DCT9
-#if 1
- {
- real t3;
- {
- real t0, t1, t2;
-
- t0 = REAL_MUL(COS6_2, (in[8] + in[16] - in[4]));
- t1 = REAL_MUL(COS6_2, in[12]);
-
- t3 = in[0];
- t2 = t3 - t1 - t1;
- tmp[1] = tmp[7] = t2 - t0;
- tmp[4] = t2 + t0 + t0;
- t3 += t1;
-
- t2 = REAL_MUL(COS6_1, (in[10] + in[14] - in[2]));
- tmp[1] -= t2;
- tmp[7] += t2;
- }
- {
- real t0, t1, t2;
-
- t0 = REAL_MUL(cos9[0], (in[4] + in[8] ));
- t1 = REAL_MUL(cos9[1], (in[8] - in[16]));
- t2 = REAL_MUL(cos9[2], (in[4] + in[16]));
-
- tmp[2] = tmp[6] = t3 - t0 - t2;
- tmp[0] = tmp[8] = t3 + t0 + t1;
- tmp[3] = tmp[5] = t3 - t1 + t2;
- }
- }
- {
- real t1, t2, t3;
-
- t1 = REAL_MUL(cos18[0], (in[2] + in[10]));
- t2 = REAL_MUL(cos18[1], (in[10] - in[14]));
- t3 = REAL_MUL(COS6_1, in[6]);
-
- {
- real t0 = t1 + t2 + t3;
- tmp[0] += t0;
- tmp[8] -= t0;
- }
-
- t2 -= t3;
- t1 -= t3;
-
- t3 = REAL_MUL(cos18[2], (in[2] + in[14]));
-
- t1 += t3;
- tmp[3] += t1;
- tmp[5] -= t1;
-
- t2 -= t3;
- tmp[2] += t2;
- tmp[6] -= t2;
- }
-
-#else
- {
- real t0, t1, t2, t3, t4, t5, t6, t7;
-
- t1 = REAL_MUL(COS6_2, in[12]);
- t2 = REAL_MUL(COS6_2, (in[8] + in[16] - in[4]));
-
- t3 = in[0] + t1;
- t4 = in[0] - t1 - t1;
- t5 = t4 - t2;
- tmp[4] = t4 + t2 + t2;
-
- t0 = REAL_MUL(cos9[0], (in[4] + in[8]));
- t1 = REAL_MUL(cos9[1], (in[8] - in[16]));
-
- t2 = REAL_MUL(cos9[2], (in[4] + in[16]));
-
- t6 = t3 - t0 - t2;
- t0 += t3 + t1;
- t3 += t2 - t1;
-
- t2 = REAL_MUL(cos18[0], (in[2] + in[10]));
- t4 = REAL_MUL(cos18[1], (in[10] - in[14]));
- t7 = REAL_MUL(COS6_1, in[6]);
-
- t1 = t2 + t4 + t7;
- tmp[0] = t0 + t1;
- tmp[8] = t0 - t1;
- t1 = REAL_MUL(cos18[2], (in[2] + in[14]));
- t2 += t1 - t7;
-
- tmp[3] = t3 + t2;
- t0 = REAL_MUL(COS6_1, (in[10] + in[14] - in[2]));
- tmp[5] = t3 - t2;
-
- t4 -= t1 + t7;
-
- tmp[1] = t5 - t0;
- tmp[7] = t5 + t0;
- tmp[2] = t6 + t4;
- tmp[6] = t6 - t4;
- }
-#endif
-
- {
- real t0, t1, t2, t3, t4, t5, t6, t7;
-
- t1 = REAL_MUL(COS6_2, in[13]);
- t2 = REAL_MUL(COS6_2, (in[9] + in[17] - in[5]));
-
- t3 = in[1] + t1;
- t4 = in[1] - t1 - t1;
- t5 = t4 - t2;
-
- t0 = REAL_MUL(cos9[0], (in[5] + in[9]));
- t1 = REAL_MUL(cos9[1], (in[9] - in[17]));
-
- tmp[13] = REAL_MUL((t4 + t2 + t2), tfcos36[17-13]);
- t2 = REAL_MUL(cos9[2], (in[5] + in[17]));
-
- t6 = t3 - t0 - t2;
- t0 += t3 + t1;
- t3 += t2 - t1;
-
- t2 = REAL_MUL(cos18[0], (in[3] + in[11]));
- t4 = REAL_MUL(cos18[1], (in[11] - in[15]));
- t7 = REAL_MUL(COS6_1, in[7]);
-
- t1 = t2 + t4 + t7;
- tmp[17] = REAL_MUL((t0 + t1), tfcos36[17-17]);
- tmp[9] = REAL_MUL((t0 - t1), tfcos36[17-9]);
- t1 = REAL_MUL(cos18[2], (in[3] + in[15]));
- t2 += t1 - t7;
-
- tmp[14] = REAL_MUL((t3 + t2), tfcos36[17-14]);
- t0 = REAL_MUL(COS6_1, (in[11] + in[15] - in[3]));
- tmp[12] = REAL_MUL((t3 - t2), tfcos36[17-12]);
-
- t4 -= t1 + t7;
-
- tmp[16] = REAL_MUL((t5 - t0), tfcos36[17-16]);
- tmp[10] = REAL_MUL((t5 + t0), tfcos36[17-10]);
- tmp[15] = REAL_MUL((t6 + t4), tfcos36[17-15]);
- tmp[11] = REAL_MUL((t6 - t4), tfcos36[17-11]);
- }
-
-#define MACRO(v) { \
- real tmpval; \
- tmpval = tmp[(v)] + tmp[17-(v)]; \
- out2[9+(v)] = REAL_MUL(tmpval, w[27+(v)]); \
- out2[8-(v)] = REAL_MUL(tmpval, w[26-(v)]); \
- tmpval = tmp[(v)] - tmp[17-(v)]; \
- ts[SBLIMIT*(8-(v))] = out1[8-(v)] + REAL_MUL(tmpval, w[8-(v)]); \
- ts[SBLIMIT*(9+(v))] = out1[9+(v)] + REAL_MUL(tmpval, w[9+(v)]); }
-
- {
- register real *out2 = o2;
- register real *w = wintab;
- register real *out1 = o1;
- register real *ts = tsbuf;
-
- MACRO(0);
- MACRO(1);
- MACRO(2);
- MACRO(3);
- MACRO(4);
- MACRO(5);
- MACRO(6);
- MACRO(7);
- MACRO(8);
- }
-
-#else
-
- {
-
-#define MACRO0(v) { \
- real tmp; \
- out2[9+(v)] = REAL_MUL((tmp = sum0 + sum1), w[27+(v)]); \
- out2[8-(v)] = REAL_MUL(tmp, w[26-(v)]); } \
- sum0 -= sum1; \
- ts[SBLIMIT*(8-(v))] = out1[8-(v)] + REAL_MUL(sum0, w[8-(v)]); \
- ts[SBLIMIT*(9+(v))] = out1[9+(v)] + REAL_MUL(sum0, w[9+(v)]);
-#define MACRO1(v) { \
- real sum0,sum1; \
- sum0 = tmp1a + tmp2a; \
- sum1 = REAL_MUL((tmp1b + tmp2b), tfcos36[(v)]); \
- MACRO0(v); }
-#define MACRO2(v) { \
- real sum0,sum1; \
- sum0 = tmp2a - tmp1a; \
- sum1 = REAL_MUL((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 = REAL_MUL(in[2*3+0], c[3]);
- ta66 = REAL_MUL(in[2*6+0], c[6]);
- tb33 = REAL_MUL(in[2*3+1], c[3]);
- tb66 = REAL_MUL(in[2*6+1], c[6]);
-
- {
- real tmp1a,tmp2a,tmp1b,tmp2b;
- tmp1a = REAL_MUL(in[2*1+0], c[1]) + ta33 + REAL_MUL(in[2*5+0], c[5]) + REAL_MUL(in[2*7+0], c[7]);
- tmp1b = REAL_MUL(in[2*1+1], c[1]) + tb33 + REAL_MUL(in[2*5+1], c[5]) + REAL_MUL(in[2*7+1], c[7]);
- tmp2a = REAL_MUL(in[2*2+0], c[2]) + REAL_MUL(in[2*4+0], c[4]) + ta66 + REAL_MUL(in[2*8+0], c[8]);
- tmp2b = REAL_MUL(in[2*2+1], c[2]) + REAL_MUL(in[2*4+1], c[4]) + tb66 + REAL_MUL(in[2*8+1], c[8]);
-
- MACRO1(0);
- MACRO2(8);
- }
-
- {
- real tmp1a,tmp2a,tmp1b,tmp2b;
- tmp1a = REAL_MUL(( in[2*1+0] - in[2*5+0] - in[2*7+0] ), c[3]);
- tmp1b = REAL_MUL(( in[2*1+1] - in[2*5+1] - in[2*7+1] ), c[3]);
- tmp2a = REAL_MUL(( in[2*2+0] - in[2*4+0] - in[2*8+0] ), c[6]) - in[2*6+0] + in[2*0+0];
- tmp2b = REAL_MUL(( 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 = REAL_MUL(in[2*1+0], c[5]) - ta33 - REAL_MUL(in[2*5+0], c[7]) + REAL_MUL(in[2*7+0], c[1]);
- tmp1b = REAL_MUL(in[2*1+1], c[5]) - tb33 - REAL_MUL(in[2*5+1], c[7]) + REAL_MUL(in[2*7+1], c[1]);
- tmp2a = - REAL_MUL(in[2*2+0], c[8]) - REAL_MUL(in[2*4+0], c[2]) + ta66 + REAL_MUL(in[2*8+0], c[4]);
- tmp2b = - REAL_MUL(in[2*2+1], c[8]) - REAL_MUL(in[2*4+1], c[2]) + tb66 + REAL_MUL(in[2*8+1], c[4]);
-
- MACRO1(2);
- MACRO2(6);
- }
-
- {
- real tmp1a,tmp2a,tmp1b,tmp2b;
- tmp1a = REAL_MUL(in[2*1+0], c[7]) - ta33 + REAL_MUL(in[2*5+0], c[1]) - REAL_MUL(in[2*7+0], c[5]);
- tmp1b = REAL_MUL(in[2*1+1], c[7]) - tb33 + REAL_MUL(in[2*5+1], c[1]) - REAL_MUL(in[2*7+1], c[5]);
- tmp2a = - REAL_MUL(in[2*2+0], c[4]) + REAL_MUL(in[2*4+0], c[8]) + ta66 - REAL_MUL(in[2*8+0], c[2]);
- tmp2b = - REAL_MUL(in[2*2+1], c[4]) + REAL_MUL(in[2*4+1], c[8]) + tb66 - REAL_MUL(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 = REAL_MUL((in[2*0+1] - in[2*2+1] + in[2*4+1] - in[2*6+1] + in[2*8+1] ), tfcos36[4]);
- MACRO0(4);
- }
- }
-#endif
-
- }
-}
-
-
-/* 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 = REAL_MUL(in2, COS6_1); \
- in3 = REAL_MUL(in3, COS6_1);
-
-#define DCT12_PART2 \
- in0 += REAL_MUL(in4, COS6_2); \
- \
- in4 = in0 + in2; \
- in0 -= in2; \
- \
- in1 += REAL_MUL(in5, COS6_2); \
- \
- in5 = REAL_MUL((in1 + in3), tfcos12[0]); \
- in1 = REAL_MUL((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 = REAL_MUL((in1 - in5), tfcos12[1]);
- tmp0 = tmp1 + tmp2;
- tmp1 -= tmp2;
- }
- ts[(17-1)*SBLIMIT] = out1[17-1] + REAL_MUL(tmp0, wi[11-1]);
- ts[(12+1)*SBLIMIT] = out1[12+1] + REAL_MUL(tmp0, wi[6+1]);
- ts[(6 +1)*SBLIMIT] = out1[6 +1] + REAL_MUL(tmp1, wi[1]);
- ts[(11-1)*SBLIMIT] = out1[11-1] + REAL_MUL(tmp1, wi[5-1]);
- }
-
- DCT12_PART2
-
- ts[(17-0)*SBLIMIT] = out1[17-0] + REAL_MUL(in2, wi[11-0]);
- ts[(12+0)*SBLIMIT] = out1[12+0] + REAL_MUL(in2, wi[6+0]);
- ts[(12+2)*SBLIMIT] = out1[12+2] + REAL_MUL(in3, wi[6+2]);
- ts[(17-2)*SBLIMIT] = out1[17-2] + REAL_MUL(in3, wi[11-2]);
-
- ts[(6 +0)*SBLIMIT] = out1[6+0] + REAL_MUL(in0, wi[0]);
- ts[(11-0)*SBLIMIT] = out1[11-0] + REAL_MUL(in0, wi[5-0]);
- ts[(6 +2)*SBLIMIT] = out1[6+2] + REAL_MUL(in4, wi[2]);
- ts[(11-2)*SBLIMIT] = out1[11-2] + REAL_MUL(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 = REAL_MUL((in1 - in5), tfcos12[1]);
- tmp0 = tmp1 + tmp2;
- tmp1 -= tmp2;
- }
- out2[5-1] = REAL_MUL(tmp0, wi[11-1]);
- out2[0+1] = REAL_MUL(tmp0, wi[6+1]);
- ts[(12+1)*SBLIMIT] += REAL_MUL(tmp1, wi[1]);
- ts[(17-1)*SBLIMIT] += REAL_MUL(tmp1, wi[5-1]);
- }
-
- DCT12_PART2
-
- out2[5-0] = REAL_MUL(in2, wi[11-0]);
- out2[0+0] = REAL_MUL(in2, wi[6+0]);
- out2[0+2] = REAL_MUL(in3, wi[6+2]);
- out2[5-2] = REAL_MUL(in3, wi[11-2]);
-
- ts[(12+0)*SBLIMIT] += REAL_MUL(in0, wi[0]);
- ts[(17-0)*SBLIMIT] += REAL_MUL(in0, wi[5-0]);
- ts[(12+2)*SBLIMIT] += REAL_MUL(in4, wi[2]);
- ts[(17-2)*SBLIMIT] += REAL_MUL(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 = REAL_MUL((in1 - in5), tfcos12[1]);
- tmp0 = tmp1 + tmp2;
- tmp1 -= tmp2;
- }
- out2[11-1] = REAL_MUL(tmp0, wi[11-1]);
- out2[6 +1] = REAL_MUL(tmp0, wi[6+1]);
- out2[0+1] += REAL_MUL(tmp1, wi[1]);
- out2[5-1] += REAL_MUL(tmp1, wi[5-1]);
- }
-
- DCT12_PART2
-
- out2[11-0] = REAL_MUL(in2, wi[11-0]);
- out2[6 +0] = REAL_MUL(in2, wi[6+0]);
- out2[6 +2] = REAL_MUL(in3, wi[6+2]);
- out2[11-2] = REAL_MUL(in3, wi[11-2]);
-
- out2[0+0] += REAL_MUL(in0, wi[0]);
- out2[5-0] += REAL_MUL(in0, wi[5-0]);
- out2[0+2] += REAL_MUL(in4, wi[2]);
- out2[5-2] += REAL_MUL(in4, wi[5-2]);
- }
-}
-
-
-static void III_hybrid(real fsIn[SBLIMIT][SSLIMIT], real tsOut[SSLIMIT][SBLIMIT], int ch,struct gr_info_s *gr_info, mpg123_handle *fr)
-{
- real (*block)[2][SBLIMIT*SSLIMIT] = fr->hybrid_block;
- int *blc = fr->hybrid_blc;
-
- real *tspnt = (real *) tsOut;
- real *rawout1,*rawout2;
- int bt = 0;
- size_t 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;
- opt_dct36(fr)(fsIn[0],rawout1,rawout2,win[0],tspnt);
- opt_dct36(fr)(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)
- {
- opt_dct36(fr)(fsIn[sb],rawout1,rawout2,win[bt],tspnt);
- opt_dct36(fr)(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++ = DOUBLE_TO_REAL(0.0);
- }
- }
-}
-
-
-/* And at the end... the main layer3 handler */
-int do_layer3(mpg123_handle *fr)
-{
- 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 = SINGLE_LEFT;
- }
- else if(single != SINGLE_STEREO) /* 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)>>1;
- i_stereo = fr->mode_ext & 0x1;
- }
- else ms_stereo = i_stereo = 0;
-
- granules = fr->lsf ? 1 : 2;
-
- /* quick hack to keep the music playing */
- /* after having seen this nasty test file... */
- if(III_get_side_info(fr, &sideinfo,stereo,ms_stereo,sfreq,single))
- {
- if(NOQUIET) error("bad frame - unable to get valid sideinfo");
- return clip;
- }
-
- set_pointer(fr,sideinfo.main_data_begin);
-
- for(gr=0;gr<granules;gr++)
- {
- /* hybridIn[2][SBLIMIT][SSLIMIT] */
- real (*hybridIn)[SBLIMIT][SSLIMIT] = fr->layer3.hybrid_in;
- /* hybridOut[2][SSLIMIT][SBLIMIT] */
- real (*hybridOut)[SSLIMIT][SBLIMIT] = fr->layer3.hybrid_out;
-
- {
- struct gr_info_s *gr_info = &(sideinfo.ch[0].gr[gr]);
- long part2bits;
- if(fr->lsf)
- part2bits = III_get_scale_factors_2(fr, scalefacs[0],gr_info,0);
- else
- part2bits = III_get_scale_factors_1(fr, scalefacs[0],gr_info,0,gr);
-
- if(III_dequantize_sample(fr, hybridIn[0], scalefacs[0],gr_info,sfreq,part2bits))
- {
- if(VERBOSE2) error("dequantization failed!");
- 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(fr, scalefacs[1],gr_info,i_stereo);
- else
- part2bits = III_get_scale_factors_1(fr, scalefacs[1],gr_info,1,gr);
-
- if(III_dequantize_sample(fr, hybridIn[1],scalefacs[1],gr_info,sfreq,part2bits))
- {
- if(VERBOSE2) error("dequantization failed!");
- return clip;
- }
-
- if(ms_stereo)
- {
- int i;
- unsigned int maxb = sideinfo.ch[0].gr[gr].maxb;
- if(sideinfo.ch[1].gr[gr].maxb > maxb) maxb = sideinfo.ch[1].gr[gr].maxb;
-
- for(i=0;i<SSLIMIT*(int)maxb;i++)
- {
- real tmp0 = ((real *)hybridIn[0])[i];
- real 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 == SINGLE_MIX) )
- {
- 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 SINGLE_MIX:
- {
- register int i;
- register real *in0 = (real *) hybridIn[0],*in1 = (real *) hybridIn[1];
- for(i=0;i<SSLIMIT*(int)gr_info->maxb;i++,in0++)
- *in0 = (*in0 + *in1++); /* *0.5 done by pow-scale */
- }
- break;
- case SINGLE_RIGHT:
- {
- register int i;
- register real *in0 = (real *) hybridIn[0],*in1 = (real *) hybridIn[1];
- for(i=0;i<SSLIMIT*(int)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, fr);
- }
-
-#ifdef OPT_I486
- if(single != SINGLE_STEREO || fr->af.encoding != MPG123_ENC_SIGNED_16 || fr->down_sample != 0)
- {
-#endif
- for(ss=0;ss<SSLIMIT;ss++)
- {
- if(single != SINGLE_STEREO)
- clip += (fr->synth_mono)(hybridOut[0][ss], fr);
- else
- clip += (fr->synth_stereo)(hybridOut[0][ss], hybridOut[1][ss], fr);
-
- }
-#ifdef OPT_I486
- } else
- {
- /* Only stereo, 16 bits benefit from the 486 optimization. */
- ss=0;
- while(ss < SSLIMIT)
- {
- int n;
- n=(fr->buffer.size - fr->buffer.fill) / (2*2*32);
- if(n > (SSLIMIT-ss)) n=SSLIMIT-ss;
-
- /* Clip counting makes no sense with this function. */
- absynth_1to1_i486(hybridOut[0][ss], 0, fr, n);
- absynth_1to1_i486(hybridOut[1][ss], 1, fr, n);
- ss+=n;
- fr->buffer.fill+=(2*2*32)*n;
- }
- }
-#endif
- }
-
- return clip;
-}
projects / reactos.git / blobdiff