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-rw-r--r--src/libmpg123/layer3.c1620
1 files changed, 0 insertions, 1620 deletions
diff --git a/src/libmpg123/layer3.c b/src/libmpg123/layer3.c
deleted file mode 100644
index 5ce3507dd..000000000
--- a/src/libmpg123/layer3.c
+++ /dev/null
@@ -1,1620 +0,0 @@
-/*
- * Mpeg Layer-3 audio decoder
- * --------------------------
- * copyright (c) 1995,1996,1997 by Michael Hipp.
- * All rights reserved. See also 'README'
- */
-
-#include <stdlib.h>
-#include "mpg123.h"
-#include "mpglib.h"
-#include "huffman.h"
-
-#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");
- return 0;
- 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 1;
-}
-#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;
- return 0;
- }
- 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 1;
-}
-
-/*
- * 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;
-}
-
-
-/*
- * 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;
- }
- }
- }
-
-/* 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;
-
- 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(mpgaudio_t *mp,
- 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] = mp->hybrid_block;
- int *blc = mp->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
- */
-void do_layer3(mpgaudio_t *mp)
-{
- int gr, ch, ss,clip=0;
- struct frame *fr = &mp->fr;
- static 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;
- int num_bytes;
-
- 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;
- }
- else {
- granules = 2;
-#ifdef MPEG1
- if (!III_get_side_info_1(&sideinfo,stereo,ms_stereo,sfreq,single))
- return;
-#else
- fprintf(stderr,"Not supported\n");
-#endif
- }
-
- if(!set_pointer(mp, sideinfo.main_data_begin)) {
- printf ("set pointer failed.\n");
- return;
- }
-
- num_bytes = 0 ;
-
- 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(mp->hybridIn[0], scalefacs[0],gr_info,sfreq,part2bits)) {
- printf ("III_dequantize_sample failed.\n");
- return;
- }
- }
- 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(mp->hybridIn[1],scalefacs[1],gr_info,sfreq,part2bits)) {
- printf ("III_dequantize_sample failed.\n");
- return;
- }
-
- if(ms_stereo) {
- int i;
- for(i=0;i<SBLIMIT*SSLIMIT;i++) {
- real tmp0,tmp1;
- tmp0 = ((real *) mp->hybridIn[0])[i];
- tmp1 = ((real *) mp->hybridIn[1])[i];
- ((real *) mp->hybridIn[0])[i] = tmp0 + tmp1;
- ((real *) mp->hybridIn[1])[i] = tmp0 - tmp1;
- }
- }
-
- if(i_stereo)
- III_i_stereo(mp->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 *) mp->hybridIn[0],*in1 = (real *) mp->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 *) mp->hybridIn[0],*in1 = (real *) mp->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(mp->hybridIn[ch],gr_info);
- III_hybrid(mp, mp->hybridIn[ch], mp->hybridOut[ch], ch,gr_info);
- }
-
- for(ss=0;ss<SSLIMIT;ss++) {
- if(single >= 0) {
- clip += synth_1to1_mono(mp, mp->hybridOut[0][ss],mp->osspace,&num_bytes);
- }
- else {
- int p1 = num_bytes;
- clip += synth_1to1(mp, mp->hybridOut[0][ss],0,mp->osspace,&p1);
- clip += synth_1to1(mp, mp->hybridOut[1][ss],1,mp->osspace,&num_bytes);
- }
- }
- }
-
- if (fr->sample_rate) {
- if ((!mp->is_output_initialized) || (mp->sample_rate_device != fr->sample_rate)) {
-
- if (mp->is_output_initialized)
- mp->ao_output->close(mp->ao_output);
-
- mp->ao_output->open (mp->ao_output, 16, fr->sample_rate,
- stereo-1 ? AO_CAP_MODE_STEREO: AO_CAP_MODE_MONO);
- mp->is_output_initialized = 1;
- mp->sample_rate_device = fr->sample_rate;
- }
-
- mp->ao_output->write (mp->ao_output, (int16_t*)mp->osspace, num_bytes/(stereo-1 ? 4:2),
- mp->pts);
- }
- mp->pts = 0;
-}
generated by cgit v1.2.3 (git 2.25.1) at 2025-04-26 17:42:17 +0000