diff options
Diffstat (limited to 'mp3lib/layer3.c')
-rw-r--r-- | mp3lib/layer3.c | 1349 |
1 files changed, 0 insertions, 1349 deletions
diff --git a/mp3lib/layer3.c b/mp3lib/layer3.c deleted file mode 100644 index 91943a8f18..0000000000 --- a/mp3lib/layer3.c +++ /dev/null @@ -1,1349 +0,0 @@ -/* - * Modified for use with MPlayer, for details see the changelog at - * http://svn.mplayerhq.hu/mplayer/trunk/ - * $Id$ - */ - -/* - * Mpeg Layer-3 audio decoder - * -------------------------- - * copyright (c) 1995-1999 by Michael Hipp. - * All rights reserved. See also 'README' - * - * 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 - */ - -#include "mpg123.h" - -#if 0 -#define L3_DEBUG 1 -#endif - -#if 0 -#define CUT_HF -#endif - -#define REAL_MUL(x, y) ((x) * (y)) - -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]; - -/* non static for external 3dnow functions */ -real COS9[9]; -static real COS6_1,COS6_2; -real tfcos36[9]; - -static real tfcos12[3]; -#define NEW_DCT9 -#ifdef NEW_DCT9 -static real cos9[3],cos18[3]; -#endif - -struct bandInfoStruct { - uint16_t longIdx[23]; - uint8_t longDiff[22]; - uint16_t shortIdx[14]; - uint8_t shortDiff[13]; -}; - -static int longLimit[9][23]; -static int shortLimit[9][14]; - -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 } } , -/* changed 19th value fropm 330 to 332 */ - { {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 */ - -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 - */ -static void init_layer3(int down_sample_sblimit) -{ - int i,j,k,l; - - for(i=-256;i<118+4;i++) - { - if(_has_mmx) - gainpow2[i+256] = 16384.0 * pow((double)2.0,-0.25 * (double) (i+210) ); - else - 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 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] = 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); - -#ifdef NEW_DCT9 - cos9[0] = cos(1.0*M_PI/9.0); - cos9[1] = cos(5.0*M_PI/9.0); - cos9[2] = cos(7.0*M_PI/9.0); - cos18[0] = cos(1.0*M_PI/18.0); - cos18[1] = cos(11.0*M_PI/18.0); - cos18[2] = cos(13.0*M_PI/18.0); -#endif - - 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 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(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++) - { - const struct bandInfoStruct *bi = &bandInfo[j]; - int *mp; - int cb,lwin; - const uint8_t *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 (for MPEG 1 and MPEG 2) - */ -static int III_get_side_info(struct III_sideinfo *si,int stereo, - int ms_stereo,int sfreq,int single,int lsf) -{ - int ch, gr; - int powdiff = (single == 3) ? 4 : 0; - - static const int tabs[2][5] = { { 2,9,5,3,4 } , { 1,8,1,2,9 } }; - const int *tab = tabs[lsf]; - - si->main_data_begin = getbits(tab[1]); - if (stereo == 1) - si->private_bits = getbits_fast(tab[2]); - else - si->private_bits = getbits_fast(tab[3]); - - if(!lsf) { - 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<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(12); - gr_info->big_values = getbits(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(tab[4]); - - if(get1bit()) { /* window switch flag */ - int i; -#ifdef L3_DEBUG -if(2*gr_info->big_values > bandInfo[sfreq].shortIdx[12]) - fprintf(stderr,"L3: BigValues too large, doesn't make sense %d %d\n",2*gr_info->big_values,bandInfo[sfreq].shortIdx[12]); -#endif - - 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. */ - if(!lsf || gr_info->block_type == 2) - gr_info->region1start = 36>>1; - else { -/* check this again for 2.5 and sfreq=8 */ - if(sfreq == 8) - gr_info->region1start = 108>>1; - else - gr_info->region1start = 54>>1; - } - gr_info->region2start = 576>>1; - } - else { - int i,r0c,r1c; -#ifdef L3_DEBUG -if(2*gr_info->big_values > bandInfo[sfreq].longIdx[21]) - fprintf(stderr,"L3: BigValues too large, doesn't make sense %d %d\n",2*gr_info->big_values,bandInfo[sfreq].longIdx[21]); -#endif - 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 ; - if(r0c + r1c + 2 > 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(!lsf) - gr_info->preflag = get1bit(); - gr_info->scalefac_scale = get1bit(); - gr_info->count1table_select = get1bit(); - } - } - - return !0; -} - -/* - * read scalefactors - */ -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; -} - -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}; - -#define getbitoffset() ((-bitindex)&0x7) -#define getbyte() (*wordpointer++) - -/* - * Dequantize samples (includes huffman decoding) - */ -/* 24 is enough because tab13 has max. a 19 bit huffvector */ -#define BITSHIFT ((sizeof(long)-1)*8) -#define REFRESH_MASK \ - while(num < BITSHIFT) { \ - mask |= ((unsigned long)getbyte())<<(BITSHIFT-num); \ - num += 8; \ - part2remain -= 8; } - -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 num=getbitoffset(); - long mask; - /* we must split this, because for num==0 the shift is undefined if you do it in one step */ - mask = ((unsigned long) getbits(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] = 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=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]; - 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; - REFRESH_MASK; - while((y=*val++)<0) { - if (mask < 0) - val -= y; - num--; - mask <<= 1; - } - x = y >> 4; - y &= 0xf; - } - if(x == 15 && h->linbits) { - max[lwin] = cb; - REFRESH_MASK; - x += ((unsigned long) mask) >> (BITSHIFT+8-h->linbits); - num -= h->linbits+1; - mask <<= h->linbits; - if(mask < 0) - *xrpnt = REAL_MUL(-ispow[x], v); - else - *xrpnt = REAL_MUL(ispow[x], v); - mask <<= 1; - } - else if(x) { - max[lwin] = cb; - if(mask < 0) - *xrpnt = REAL_MUL(-ispow[x], v); - else - *xrpnt = REAL_MUL(ispow[x], v); - num--; - mask <<= 1; - } - else - *xrpnt = 0.0; - xrpnt += step; - if(y == 15 && h->linbits) { - max[lwin] = cb; - REFRESH_MASK; - y += ((unsigned long) mask) >> (BITSHIFT+8-h->linbits); - num -= h->linbits+1; - mask <<= h->linbits; - if(mask < 0) - *xrpnt = REAL_MUL(-ispow[y], v); - else - *xrpnt = REAL_MUL(ispow[y], v); - mask <<= 1; - } - else if(y) { - max[lwin] = cb; - if(mask < 0) - *xrpnt = REAL_MUL(-ispow[y], v); - else - *xrpnt = REAL_MUL(ispow[y], v); - num--; - mask <<= 1; - } - else - *xrpnt = 0.0; - xrpnt += step; - } - } - - for(;l3 && (part2remain+num > 0);l3--) { - struct newhuff *h = htc+gr_info->count1table_select; - register short *val = h->table,a; - - REFRESH_MASK; - while((a=*val++)<0) { - if (mask < 0) - 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) { - 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; - if(part2remain+num <= 0) { - break; - } - if(mask < 0) - *xrpnt = -v; - else - *xrpnt = v; - num--; - mask <<= 1; - } - else - *xrpnt = 0.0; - xrpnt += step; - } - } - - if(lwin < 3) { /* short band? */ - while(1) { - for(;mc > 0;mc--) { - *xrpnt = 0.0; xrpnt += 3; /* short band -> step=3 */ - *xrpnt = 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 ? 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; - 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]; - struct newhuff *h = ht+gr_info->table_select[i]; - - for(;lp;lp--,mc--) { - int x,y; - - if(!mc) { - mc = *m++; - cb = *m++; -#ifdef CUT_HF - if(cb == 21) { - fprintf(stderr,"c"); - v = 0.0; - } - else -#endif - v = gr_info->pow2gain[((*scf++) + (*pretab++)) << shift]; - - } - { - register short *val = h->table; - REFRESH_MASK; - while((y=*val++)<0) { - if (mask < 0) - val -= y; - num--; - mask <<= 1; - } - x = y >> 4; - y &= 0xf; - } - - if (x == 15 && h->linbits) { - max = cb; - REFRESH_MASK; - x += ((unsigned long) mask) >> (BITSHIFT+8-h->linbits); - num -= h->linbits+1; - mask <<= h->linbits; - if(mask < 0) - *xrpnt++ = REAL_MUL(-ispow[x], v); - else - *xrpnt++ = REAL_MUL(ispow[x], v); - mask <<= 1; - } - else if(x) { - max = cb; - if(mask < 0) - *xrpnt++ = REAL_MUL(-ispow[x], v); - else - *xrpnt++ = REAL_MUL(ispow[x], v); - num--; - mask <<= 1; - } - else - *xrpnt++ = 0.0; - - if (y == 15 && h->linbits) { - max = cb; - REFRESH_MASK; - y += ((unsigned long) mask) >> (BITSHIFT+8-h->linbits); - num -= h->linbits+1; - mask <<= h->linbits; - if(mask < 0) - *xrpnt++ = REAL_MUL(-ispow[y], v); - else - *xrpnt++ = REAL_MUL(ispow[y], v); - mask <<= 1; - } - else if(y) { - max = cb; - if(mask < 0) - *xrpnt++ = REAL_MUL(-ispow[y], v); - else - *xrpnt++ = REAL_MUL(ispow[y], v); - num--; - mask <<= 1; - } - else - *xrpnt++ = 0.0; - } - } - - /* - * short (count1table) values - */ - for(;l3 && (part2remain+num > 0);l3--) { - struct newhuff *h = htc+gr_info->count1table_select; - register short *val = h->table,a; - - REFRESH_MASK; - while((a=*val++)<0) { - if (mask < 0) - 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_HF - if(cb == 21) { - fprintf(stderr,"c"); - v = 0.0; - } - else -#endif - v = gr_info->pow2gain[((*scf++) + (*pretab++)) << shift]; - } - mc--; - } - if ( (a & (0x8>>i)) ) { - max = cb; - if(part2remain+num <= 0) { - break; - } - if(mask < 0) - *xrpnt++ = -v; - else - *xrpnt++ = v; - num--; - mask <<= 1; - } - else - *xrpnt++ = 0.0; - } - } - - gr_info->maxbandl = max+1; - gr_info->maxb = longLimit[sfreq][gr_info->maxbandl]; - } - - part2remain += num; -// backbits(num); - bitindex -= num; wordpointer += (bitindex>>3); bitindex &= 0x7; - num = 0; - - while(xrpnt < &xr[SBLIMIT][0]) - *xrpnt++ = 0.0; - - 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; -} - - - - -/* - * 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; - const struct bandInfoStruct *bi = &bandInfo[sfreq]; - - const real *tab1,*tab2; - - int tab; - 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]; -#if 0 - 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 - -// printf("III_i_st: tab1=%p tab2=%p tab=%d ms=%d \n", tab1, tab2, tab, ms_stereo); - - 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(v, t1); - xr[1][idx] = REAL_MUL(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(v, t1); - xr[1][idx] = REAL_MUL(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 = 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(v, t1); - xr[1][idx] = REAL_MUL(v, t2); - } - } - else - idx += sb; - } - } - } - else { /* ((gr_info->block_type != 2)) */ - int sfb = gr_info->maxbandl; - int is_p,idx = bi->longIdx[sfb]; - -/* hmm ... maybe the maxbandl stuff for i-stereo is buggy? */ - if(sfb <= 21) { - 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(v, t1); - xr[1][idx] = REAL_MUL(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(v, t1); - xr[1][idx] = REAL_MUL(v, t2); - } - } - } /* end: if(sfb <= 21) */ - } /* ... */ -} - -static void III_antialias(real xr[SBLIMIT][SSLIMIT],struct gr_info_s *gr_info) { |