| /* | |
| * Mpeg Layer-3 audio decoder | |
| * -------------------------- | |
| * copyright (c) 1995,1996,1997 by Michael Hipp. | |
| * All rights reserved. See also 'README' | |
| * This file has been copied from mpglib. | |
| * | |
| * This library is free software; you can redistribute it and/or | |
| * modify it under the terms of the GNU Lesser General Public | |
| * License as published by the Free Software Foundation; either | |
| * version 2.1 of the License, or (at your option) any later version. | |
| * | |
| * This library is distributed in the hope that it will be useful, | |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| * Lesser General Public License for more details. | |
| * | |
| * You should have received a copy of the GNU Lesser General Public | |
| * License along with this library; if not, write to the Free Software | |
| * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
| */ | |
| #include <stdlib.h> | |
| #include "mpg123.h" | |
| #include "mpglib.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; | |
| } |