aboutsummaryrefslogtreecommitdiffstats
path: root/addons/mp3/layer3.c
diff options
context:
space:
mode:
Diffstat (limited to 'addons/mp3/layer3.c')
-rw-r--r--addons/mp3/layer3.c2029
1 files changed, 2029 insertions, 0 deletions
diff --git a/addons/mp3/layer3.c b/addons/mp3/layer3.c
new file mode 100644
index 000000000..793c99633
--- /dev/null
+++ b/addons/mp3/layer3.c
@@ -0,0 +1,2029 @@
+/*
+ * Mpeg Layer-3 audio decoder
+ * --------------------------
+ * copyright (c) 1995,1996,1997 by Michael Hipp.
+ * All rights reserved. See also 'README'
+ */
+
+#include <asterisk.h>
+#include <asterisk/logger.h>
+#include <stdlib.h>
+#include "mpg123.h"
+#include "mpglib.h"
+#include "huffman.h"
+
+#define MPEG1
+
+/* These should all be constants setup once using init_layer3_const */
+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];
+};
+
+
+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 constant tables for layer-3
+ */
+void init_layer3_const(void)
+{
+ 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(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);
+ }
+ }
+ }
+}
+
+/* MP3 file specific rates */
+void init_layer3_sample_limits(struct mpstr *mp, int down_sample_sblimit)
+{
+ int i,j;
+ for(j=0;j<9;j++) {
+ for(i=0;i<23;i++) {
+ (mp->longLimit)[j][i] = (bandInfo[j].longIdx[i] - 1 + 8) / 18 + 1;
+ if((mp->longLimit)[j][i] > (down_sample_sblimit) )
+ (mp->longLimit)[j][i] = down_sample_sblimit;
+ }
+ for(i=0;i<14;i++) {
+ (mp->shortLimit)[j][i] = (bandInfo[j].shortIdx[i] - 1) / 18 + 1;
+ if((mp->shortLimit)[j][i] > (down_sample_sblimit) )
+ (mp->shortLimit)[j][i] = down_sample_sblimit;
+ }
+ }
+}
+
+
+
+/*
+ * read additional side information
+ */
+#ifdef MPEG1
+static int III_get_side_info_1(struct mpstr *mp, 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(mp, 9);
+ if (stereo == 1)
+ si->private_bits = getbits_fast(mp, 5);
+ else
+ si->private_bits = getbits_fast(mp, 3);
+
+ for (ch=0; ch<stereo; ch++) {
+ si->ch[ch].gr[0].scfsi = -1;
+ si->ch[ch].gr[1].scfsi = getbits_fast(mp, 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(mp, 12);
+ gr_info->big_values = getbits_fast(mp, 9);
+ if(gr_info->big_values > 288) {
+ ast_log(LOG_WARNING,"big_values too large!\n");
+ gr_info->big_values = 288;
+ }
+ gr_info->pow2gain = gainpow2+256 - getbits_fast(mp, 8) + powdiff;
+ if(ms_stereo)
+ gr_info->pow2gain += 2;
+ gr_info->scalefac_compress = getbits_fast(mp, 4);
+/* window-switching flag == 1 for block_Type != 0 .. and block-type == 0 -> win-sw-flag = 0 */
+ if(get1bit(mp))
+ {
+ int i;
+ gr_info->block_type = getbits_fast(mp, 2);
+ gr_info->mixed_block_flag = get1bit(mp);
+ gr_info->table_select[0] = getbits_fast(mp, 5);
+ gr_info->table_select[1] = getbits_fast(mp, 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(mp, 3)<<3);
+
+ if(gr_info->block_type == 0) {
+ ast_log(LOG_WARNING,"Blocktype == 0 and window-switching == 1 not allowed.\n");
+ return (1);
+ }
+ /* 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(mp, 5);
+ r0c = getbits_fast(mp, 4);
+ r1c = getbits_fast(mp, 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(mp);
+ gr_info->scalefac_scale = get1bit(mp);
+ gr_info->count1table_select = get1bit(mp);
+ }
+ }
+ return (0);
+
+}
+#endif
+
+/*
+ * Side Info for MPEG 2.0 / LSF
+ */
+static int III_get_side_info_2(struct mpstr *mp, 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(mp, 8);
+ if (stereo == 1)
+ si->private_bits = get1bit(mp);
+ else
+ si->private_bits = getbits_fast(mp, 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(mp, 12);
+ gr_info->big_values = getbits_fast(mp, 9);
+ if(gr_info->big_values > 288) {
+ ast_log(LOG_WARNING,"big_values too large!\n");
+ gr_info->big_values = 288;
+ }
+ gr_info->pow2gain = gainpow2+256 - getbits_fast(mp, 8) + powdiff;
+ if(ms_stereo)
+ gr_info->pow2gain += 2;
+ gr_info->scalefac_compress = getbits(mp, 9);
+/* window-switching flag == 1 for block_Type != 0 .. and block-type == 0 -> win-sw-flag = 0 */
+ if(get1bit(mp))
+ {
+ int i;
+ gr_info->block_type = getbits_fast(mp, 2);
+ gr_info->mixed_block_flag = get1bit(mp);
+ gr_info->table_select[0] = getbits_fast(mp, 5);
+ gr_info->table_select[1] = getbits_fast(mp, 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(mp, 3)<<3);
+
+ if(gr_info->block_type == 0) {
+ ast_log(LOG_WARNING,"Blocktype == 0 and window-switching == 1 not allowed.\n");
+ return (1);
+ }
+ /* 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(mp, 5);
+ r0c = getbits_fast(mp, 4);
+ r1c = getbits_fast(mp, 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(mp);
+ gr_info->count1table_select = get1bit(mp);
+ }
+ return (0);
+}
+
+/*
+ * read scalefactors
+ */
+#ifdef MPEG1
+static int III_get_scale_factors_1(struct mpstr *mp, int *scf,struct gr_info_s *gr_info)
+{
+ static 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(mp, num0);
+ i = 9;
+ numbits -= num0; /* num0 * 17 + num1 * 18 */
+ }
+
+ for (;i;i--)
+ *scf++ = getbits_fast(mp, num0);
+ for (i = 18; i; i--)
+ *scf++ = getbits_fast(mp, 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(mp, num0);
+ for(i=10;i;i--)
+ *scf++ = getbits_fast(mp, num1);
+ numbits = (num0 + num1) * 10 + num0;
+ }
+ else {
+ numbits = 0;
+ if(!(scfsi & 0x8)) {
+ for (i=6;i;i--)
+ *scf++ = getbits_fast(mp, num0);
+ numbits += num0 * 6;
+ }
+ else {
+ *scf++ = 0; *scf++ = 0; *scf++ = 0; /* set to ZERO necessary? */
+ *scf++ = 0; *scf++ = 0; *scf++ = 0;
+ }
+
+ if(!(scfsi & 0x4)) {
+ for (i=5;i;i--)
+ *scf++ = getbits_fast(mp, num0);
+ numbits += num0 * 5;
+ }
+ else {
+ *scf++ = 0; *scf++ = 0; *scf++ = 0; /* set to ZERO necessary? */
+ *scf++ = 0; *scf++ = 0;
+ }
+
+ if(!(scfsi & 0x2)) {
+ for(i=5;i;i--)
+ *scf++ = getbits_fast(mp, num1);
+ numbits += num1 * 5;
+ }
+ else {
+ *scf++ = 0; *scf++ = 0; *scf++ = 0; /* set to ZERO necessary? */
+ *scf++ = 0; *scf++ = 0;
+ }
+
+ if(!(scfsi & 0x1)) {
+ for (i=5;i;i--)
+ *scf++ = getbits_fast(mp, num1);
+ numbits += num1 * 5;
+ }
+ else {
+ *scf++ = 0; *scf++ = 0; *scf++ = 0; /* set to ZERO necessary? */
+ *scf++ = 0; *scf++ = 0;
+ }
+ }
+
+ *scf++ = 0; /* no l[21] in original sources */
+ }
+ return numbits;
+}
+#endif
+
+static int III_get_scale_factors_2(struct mpstr *mp, 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(mp, 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(struct mpstr *mp, 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(mp))
+ val -= y;
+ part2remain--;
+ }
+ x = y >> 4;
+ y &= 0xf;
+ }
+ if(x == 15) {
+ max[lwin] = cb;
+ part2remain -= h->linbits+1;
+ x += getbits(mp, h->linbits);
+ if(get1bit(mp))
+ *xrpnt = -ispow[x] * v;
+ else
+ *xrpnt = ispow[x] * v;
+ }
+ else if(x) {
+ max[lwin] = cb;
+ if(get1bit(mp))
+ *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(mp, h->linbits);
+ if(get1bit(mp))
+ *xrpnt = -ispow[y] * v;
+ else
+ *xrpnt = ispow[y] * v;
+ }
+ else if(y) {
+ max[lwin] = cb;
+ if(get1bit(mp))
+ *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(mp))
+ 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(mp))
+ *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 ? (mp->shortLimit)[sfreq][rmax] : (mp->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(mp))
+ val -= y;
+ part2remain--;
+ }
+ x = y >> 4;
+ y &= 0xf;
+ }
+ if (x == 15) {
+ max = cb;
+ part2remain -= h->linbits+1;
+ x += getbits(mp, h->linbits);
+ if(get1bit(mp))
+ *xrpnt++ = -ispow[x] * v;
+ else
+ *xrpnt++ = ispow[x] * v;
+ }
+ else if(x) {
+ max = cb;
+ if(get1bit(mp))
+ *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(mp, h->linbits);
+ if(get1bit(mp))
+ *xrpnt++ = -ispow[y] * v;
+ else
+ *xrpnt++ = ispow[y] * v;
+ }
+ else if(y) {
+ max = cb;
+ if(get1bit(mp))
+ *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(mp))
+ 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(mp))
+ *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 = (mp->longLimit)[sfreq][gr_info->maxbandl];
+ }
+
+ while( part2remain > 16 ) {
+ getbits(mp, 16); /* Dismiss stuffing Bits */
+ part2remain -= 16;
+ }
+ if(part2remain > 0)
+ getbits(mp, part2remain);
+ else if(part2remain < 0) {
+ ast_log(LOG_WARNING,"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(mp))
+ val -= y;
+ part2remain--;
+ }
+ x = y >> 4;
+ y &= 0xf;
+ }
+ if(x == 15) {
+ max[lwin] = cb;
+ part2remain -= h->linbits+1;
+ x += getbits(mp, h->linbits);
+ if(get1bit(mp)) {
+ 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(mp)) {
+ 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(mp, h->linbits);
+ if(get1bit(mp)) {
+ 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(mp)) {
+ 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(mp))
+ 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(mp)) {
+ *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 ? (mp->shortLimit)[sfreq][rmax] : (mp->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(mp))
+ val -= y;
+ part2remain--;
+ }
+ x = y >> 4;
+ y &= 0xf;
+ }
+ if (x == 15) {
+ max = cb;
+ part2remain -= h->linbits+1;
+ x += getbits(mp, h->linbits);
+ if(get1bit(mp)) {
+ 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(mp)) {
+ 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(mp, h->linbits);
+ if(get1bit(mp)) {
+ 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(mp)) {
+ 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(mp))
+ 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(mp)) {
+ *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(mp, 16); /* Dismiss stuffing Bits */
+ part2remain -= 16;
+ }
+ if(part2remain > 0 )
+ getbits(mp, part2remain);
+ else if(part2remain < 0) {
+ ast_log(LOG_WARNING,"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(struct mpstr *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
+ */
+int do_layer3(struct mpstr *mp,unsigned char *pcm_sample,int *pcm_point)
+{
+
+ int gr, ch, ss,clip=0;
+ int scalefacs[39]; /* max 39 for short[13][3] mode, mixed: 38, long: 22 */
+ struct III_sideinfo sideinfo;
+ struct frame *fr;
+ int stereo, single, sfreq;
+ int ms_stereo,i_stereo;
+ int stereo1,granules;
+
+ fr = &(mp->fr);
+ stereo = fr->stereo;
+ single = fr->single;
+ sfreq = fr->sampling_frequency;
+
+
+
+ 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(mp, &sideinfo,stereo,ms_stereo,sfreq,single))
+ return (MP3_ERR);
+ }
+ else {
+ granules = 2;
+#ifdef MPEG1
+ if ( III_get_side_info_1(mp, &sideinfo,stereo,ms_stereo,sfreq,single))
+ return (MP3_ERR);
+
+#else
+ ast_log(LOG_WARNING,"Not supported\n");
+#endif
+ }
+
+ if(set_pointer(mp, sideinfo.main_data_begin) == MP3_ERR)
+ return 0;
+
+ for (gr=0;gr<granules;gr++)
+ {
+ static real hybridIn[2][SBLIMIT][SSLIMIT];
+ static 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(mp, scalefacs,gr_info,0);
+ else {
+#ifdef MPEG1
+ part2bits = III_get_scale_factors_1(mp, scalefacs,gr_info);
+#else
+ ast_log(LOG_WARNING,"Not supported\n");
+#endif
+ }
+ if(III_dequantize_sample(mp, hybridIn[0], scalefacs,gr_info,sfreq,part2bits))
+ return (MP3_ERR);
+ }
+ 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(mp, scalefacs,gr_info,i_stereo);
+ else {
+#ifdef MPEG1
+ part2bits = III_get_scale_factors_1(mp, scalefacs,gr_info);
+#else
+ ast_log(LOG_WARNING,"Not supported\n");
+#endif
+ }
+
+ if(III_dequantize_sample(mp, hybridIn[1],scalefacs,gr_info,sfreq,part2bits))
+ return (MP3_ERR);
+
+ 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[1])[i] = tmp0 - tmp1;
+ ((real *) hybridIn[0])[i] = tmp0 + tmp1;
+ }
+ }
+
+ if(i_stereo)
+ III_i_stereo(hybridIn,scalefacs,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(mp, hybridIn[ch], hybridOut[ch], ch,gr_info);
+ }
+
+ for(ss=0;ss<SSLIMIT;ss++) {
+ if(single >= 0) {
+ clip += synth_ntom_mono(mp,hybridOut[0][ss],pcm_sample,pcm_point);
+ }
+ else {
+ int p1 = *pcm_point;
+ clip += synth_ntom(mp,hybridOut[0][ss],0,pcm_sample,&p1);
+ clip += synth_ntom(mp,hybridOut[1][ss],1,pcm_sample,pcm_point);
+ }
+ }
+ }
+
+ return 0;
+}
+
+
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-10 03:26:46 +0000