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-rw-r--r--mp3lib/layer3.c1349
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) {