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-rw-r--r--package/multimedia/mpg123/mpg123-0.66-arm-unroll.patch2126
1 files changed, 2126 insertions, 0 deletions
diff --git a/package/multimedia/mpg123/mpg123-0.66-arm-unroll.patch b/package/multimedia/mpg123/mpg123-0.66-arm-unroll.patch
new file mode 100644
index 000000000..6d8ff2258
--- /dev/null
+++ b/package/multimedia/mpg123/mpg123-0.66-arm-unroll.patch
@@ -0,0 +1,2126 @@
+diff -urN mpg123-0.66-0rig//src/layer2.c mpg123-0.66/src/layer2.c
+--- mpg123-0.66-0rig//src/layer2.c 2009-01-24 08:14:24.000000000 +0100
++++ mpg123-0.66/src/layer2.c 2009-01-24 11:07:01.000000000 +0100
+@@ -155,6 +155,22 @@
+
+ }
+
++#if defined(MPG123_ARM_UNROLL_FIX)
++static int al_table_get_d_out;
++void al_table_get_d(struct al_table * al)
++{
++ int al_d = al->d;
++ al_table_get_d_out = al_d;
++}
++
++int arm_funroll_data;
++void arm_funroll_fix(short *val)
++{
++ arm_funroll_data = *val;
++}
++
++#endif
++
+ void II_step_two(unsigned int *bit_alloc,real fraction[2][4][SBLIMIT],int *scale,struct frame *fr,int x1)
+ {
+ int i,j,k,ba;
+@@ -173,7 +189,13 @@
+ if ( (ba=*bita++) )
+ {
+ k=(alloc2 = alloc1+ba)->bits;
++#if defined(MPG123_ARM_UNROLL_FIX)
++ al_table_get_d(alloc2);
++ d1 = al_table_get_d_out;
++ if( (d1) < 0)
++#else
+ if( (d1=alloc2->d) < 0)
++#endif
+ {
+ real cm=muls[k][scale[x1]];
+ fraction[j][0][i] = ((real) ((int)getbits(k) + d1)) * cm;
+@@ -204,7 +226,13 @@
+ if ( (ba=*bita++) )
+ {
+ k=(alloc2 = alloc1+ba)->bits;
++#if defined(MPG123_ARM_UNROLL_FIX)
++ al_table_get_d(alloc2);
++ d1 = al_table_get_d_out;
++ if( (d1) < 0)
++#else
+ if( (d1=alloc2->d) < 0)
++#endif
+ {
+ real cm;
+ cm=muls[k][scale[x1+3]];
+diff -urN mpg123-0.66-0rig//src/layer3.c mpg123-0.66/src/layer3.c
+--- mpg123-0.66-0rig//src/layer3.c 2009-01-24 08:14:24.000000000 +0100
++++ mpg123-0.66/src/layer3.c 2009-01-24 11:07:11.000000000 +0100
+@@ -650,7 +650,10 @@
+
+ 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};
+-
++#if defined(MPG123_ARM_UNROLL_FIX)
++extern int arm_funroll_data;
++extern void arm_funroll_fix(short *val);
++#endif
+ /*
+ * Dequantize samples (includes huffman decoding)
+ */
+@@ -749,6 +752,24 @@
+ step = 3;
+ }
+ }
++#if defined(MPG123_ARM_UNROLL_FIX)
++ {
++ register short *val = h->table;
++ REFRESH_MASK;
++ do {
++ arm_funroll_fix(val); val++;
++ y = arm_funroll_data;
++ if (y < 0) {
++ if (mask < 0)
++ val -= y;
++ num--;
++ mask <<= 1;
++ }
++ } while (y < 0);
++ x = y >> 4;
++ y &= 0xf;
++ }
++#else
+ {
+ register short *val = h->table;
+ REFRESH_MASK;
+@@ -761,6 +782,7 @@
+ x = y >> 4;
+ y &= 0xf;
+ }
++#endif
+ if(x == 15 && h->linbits) {
+ max[lwin] = cb;
+ REFRESH_MASK;
+@@ -939,6 +961,24 @@
+ v = gr_info->pow2gain[((*scf++) + (*pretab++)) << shift];
+
+ }
++#if defined(MPG123_ARM_UNROLL_FIX)
++ {
++ register short *val = h->table;
++ REFRESH_MASK;
++ do {
++ arm_funroll_fix(val); val++;
++ y = arm_funroll_data;
++ if (y < 0) {
++ if (mask < 0)
++ val -= y;
++ num--;
++ mask <<= 1;
++ }
++ } while (y < 0);
++ x = y >> 4;
++ y &= 0xf;
++ }
++#else
+ {
+ register short *val = h->table;
+ REFRESH_MASK;
+@@ -951,6 +991,7 @@
+ x = y >> 4;
+ y &= 0xf;
+ }
++#endif
+
+ if (x == 15 && h->linbits) {
+ max = cb;
+diff -urN mpg123-0.66-0rig//src/layer3.c~ mpg123-0.66/src/layer3.c~
+--- mpg123-0.66-0rig//src/layer3.c~ 1970-01-01 01:00:00.000000000 +0100
++++ mpg123-0.66/src/layer3.c~ 2009-01-24 11:07:01.000000000 +0100
+@@ -0,0 +1,1987 @@
++/*
++ leyer3.c: the layer 3 decoder
++
++ copyright 1995-2006 by the mpg123 project - free software under the terms of the LGPL 2.1
++ see COPYING and AUTHORS files in distribution or http://mpg123.org
++ initially written by Michael Hipp
++
++ 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
++
++ The int-vs-pointer situation has to be cleaned up.
++*/
++
++#include <stdlib.h>
++#include "config.h"
++#include "mpg123.h"
++#include "huffman.h"
++
++#include "common.h"
++#include "debug.h"
++
++#include "getbits.h"
++
++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];
++real COS9[9]; /* dct36_3dnow wants to use that */
++static real COS6_1,COS6_2;
++real tfcos36[9]; /* dct36_3dnow wants to use that */
++static real tfcos12[3];
++#define NEW_DCT9
++#ifdef NEW_DCT9
++static real cos9[3],cos18[3];
++#endif
++
++struct bandInfoStruct {
++ int longIdx[23];
++ int longDiff[22];
++ int shortIdx[14];
++ int 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 } } ,
++
++/* mhipp trunk has 330 -> 332 without further explanation ... */
++ { {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];
++
++#ifdef GAPLESS
++/* still a dirty hack, places in bytes (zero-based)... */
++static unsigned long position; /* position in raw decoder bytestream */
++static unsigned long begin; /* first byte to play == number to skip */
++static unsigned long end; /* last byte to play */
++static unsigned long ignore; /* forcedly ignore stuff in between */
++static int bytified;
++
++/* input in bytes already */
++void layer3_gapless_init(unsigned long b, unsigned long e)
++{
++ bytified = 0;
++ position = 0;
++ ignore = 0;
++ begin = b;
++ end = e;
++ debug2("layer3_gapless_init: from %lu to %lu samples", begin, end);
++}
++
++void layer3_gapless_set_position(unsigned long frames, struct frame* fr, struct audio_info_struct *ai)
++{
++ position = samples_to_bytes(frames*spf(fr), fr, ai);
++ debug1("set; position now %lu", position);
++}
++
++void layer3_gapless_bytify(struct frame *fr, struct audio_info_struct *ai)
++{
++ if(!bytified)
++ {
++ begin = samples_to_bytes(begin, fr, ai);
++ end = samples_to_bytes(end, fr, ai);
++ bytified = 1;
++ debug2("bytified: begin=%lu; end=%5lu", begin, end);
++ }
++}
++
++/* I need initialized fr here! */
++void layer3_gapless_set_ignore(unsigned long frames, struct frame *fr, struct audio_info_struct *ai)
++{
++ ignore = samples_to_bytes(frames*spf(fr), fr, ai);
++}
++
++/*
++ take the (partially or fully) filled and remove stuff for gapless mode if needed
++ pcm_point may then be smaller than before...
++*/
++void layer3_gapless_buffercheck()
++{
++ /* pcm_point bytes added since last position... */
++ unsigned long new_pos = position + pcm_point;
++ if(begin && (position < begin))
++ {
++ debug4("new_pos %lu (old: %lu), begin %lu, pcm_point %i", new_pos, position, begin, pcm_point);
++ if(new_pos < begin)
++ {
++ if(ignore > pcm_point) ignore -= pcm_point;
++ else ignore = 0;
++ pcm_point = 0; /* full of padding/delay */
++ }
++ else
++ {
++ unsigned long ignored = begin-position;
++ /* we need to shift the memory to the left... */
++ debug3("old pcm_point: %i, begin %lu; good bytes: %i", pcm_point, begin, (int)(new_pos-begin));
++ if(ignore > ignored) ignore -= ignored;
++ else ignore = 0;
++ pcm_point -= ignored;
++ debug3("shifting %i bytes from %p to %p", pcm_point, pcm_sample+(int)(begin-position), pcm_sample);
++ memmove(pcm_sample, pcm_sample+(int)(begin-position), pcm_point);
++ }
++ }
++ /* I don't cover the case with both end and begin in chunk! */
++ else if(end && (new_pos > end))
++ {
++ ignore = 0;
++ /* either end in current chunk or chunk totally out */
++ debug2("ending at position %lu / point %i", new_pos, pcm_point);
++ if(position < end) pcm_point -= new_pos-end;
++ else pcm_point = 0;
++ debug1("set pcm_point to %i", pcm_point);
++ }
++ else if(ignore)
++ {
++ if(pcm_point < ignore)
++ {
++ ignore -= pcm_point;
++ debug2("ignored %i bytes; pcm_point = 0; %lu bytes left", pcm_point, ignore);
++ pcm_point = 0;
++ }
++ else
++ {
++ /* we need to shift the memory to the left... */
++ debug3("old pcm_point: %i, to ignore: %lu; good bytes: %i", pcm_point, ignore, pcm_point-(int)ignore);
++ pcm_point -= ignore;
++ debug3("shifting %i bytes from %p to %p", pcm_point, pcm_sample+ignore, pcm_sample);
++ memmove(pcm_sample, pcm_sample+ignore, pcm_point);
++ ignore = 0;
++ }
++ }
++ position = new_pos;
++}
++#endif
++
++#ifdef OPT_MMXORSSE
++real init_layer3_gainpow2_mmx(int i)
++{
++ if(!param.down_sample) return 16384.0 * pow((double)2.0,-0.25 * (double) (i+210) );
++ else return DOUBLE_TO_REAL(pow((double)2.0,-0.25 * (double) (i+210)));
++}
++#endif
++
++real init_layer3_gainpow2(int i)
++{
++ return DOUBLE_TO_REAL(pow((double)2.0,-0.25 * (double) (i+210)));
++}
++
++/*
++ * 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] = opt_init_layer3_gainpow2(i);
++
++ for(i=0;i<8207;i++)
++ ispow[i] = DOUBLE_TO_REAL(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] = DOUBLE_TO_REAL(1.0/sq);
++ aa_ca[i] = DOUBLE_TO_REAL(Ci[i]/sq);
++ }
++
++ for(i=0;i<18;i++) {
++ win[0][i] = win[1][i] = DOUBLE_TO_REAL(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] = DOUBLE_TO_REAL(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] = DOUBLE_TO_REAL(0.5 / cos ( M_PI * (double) (2*(i+18)+19) / 72.0 ));
++ win[3][i+12] = DOUBLE_TO_REAL(0.5 / cos ( M_PI * (double) (2*(i+12)+19) / 72.0 ));
++ win[1][i+24] = DOUBLE_TO_REAL(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] = DOUBLE_TO_REAL(0.0);
++ win[3][i+6 ] = DOUBLE_TO_REAL(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] = DOUBLE_TO_REAL(cos( M_PI / 18.0 * (double) i));
++
++ for(i=0;i<9;i++)
++ tfcos36[i] = DOUBLE_TO_REAL(0.5 / cos ( M_PI * (double) (i*2+1) / 36.0 ));
++ for(i=0;i<3;i++)
++ tfcos12[i] = DOUBLE_TO_REAL(0.5 / cos ( M_PI * (double) (i*2+1) / 12.0 ));
++
++ COS6_1 = DOUBLE_TO_REAL(cos( M_PI / 6.0 * (double) 1));
++ COS6_2 = DOUBLE_TO_REAL(cos( M_PI / 6.0 * (double) 2));
++
++#ifdef NEW_DCT9
++ cos9[0] = DOUBLE_TO_REAL(cos(1.0*M_PI/9.0));
++ cos9[1] = DOUBLE_TO_REAL(cos(5.0*M_PI/9.0));
++ cos9[2] = DOUBLE_TO_REAL(cos(7.0*M_PI/9.0));
++ cos18[0] = DOUBLE_TO_REAL(cos(1.0*M_PI/18.0));
++ cos18[1] = DOUBLE_TO_REAL(cos(11.0*M_PI/18.0));
++ cos18[2] = DOUBLE_TO_REAL(cos(13.0*M_PI/18.0));
++#endif
++
++ for(i=0;i<12;i++) {
++ win[2][i] = DOUBLE_TO_REAL(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] = DOUBLE_TO_REAL(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] = DOUBLE_TO_REAL(t / (1.0+t));
++ tan2_1[i] = DOUBLE_TO_REAL(1.0 / (1.0 + t));
++ tan1_2[i] = DOUBLE_TO_REAL(M_SQRT2 * t / (1.0+t));
++ tan2_2[i] = DOUBLE_TO_REAL(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] = DOUBLE_TO_REAL(p1);
++ pow2_1[j][i] = DOUBLE_TO_REAL(p2);
++ pow1_2[j][i] = DOUBLE_TO_REAL(M_SQRT2 * p1);
++ pow2_2[j][i] = DOUBLE_TO_REAL(M_SQRT2 * p2);
++ }
++ }
++
++ for(j=0;j<9;j++) {
++ struct bandInfoStruct *bi = &bandInfo[j];
++ int *mp;
++ int cb,lwin;
++ int *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,long 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) {
++ error("big_values too large!");
++ 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;
++ 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) {
++ error("Blocktype == 0 and window-switching == 1 not allowed.");
++ /* exit(1); */
++ return 1;
++ }
++
++ /* 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;
++ 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;
++ }
++ 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,int ch,int gr)
++{
++ 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,n=0,numbits=0;
++ unsigned int slen;
++
++ 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};
++#if defined(MPG123_ARM_UNROLL_FIX)
++extern int arm_funroll_data;
++extern void arm_funroll_fix(short *val);
++#endif
++/*
++ * 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;
++
++ /* mhipp tree has this split up a bit... */
++ int num=getbitoffset();
++ long mask = (long) getbits(num)<<(BITSHIFT+8-num);
++ part2remain -= num;
++
++ {
++ int bv = gr_info->big_values;
++ int region1 = gr_info->region1start;
++ int region2 = gr_info->region2start;
++if(region1 > region2)
++{
++ /* That's not optimal: it fixes a segfault with fuzzed data, but also apparently triggers where it shouldn't, see bug 1641196.
++ The benefit of not crashing / having this security risk is bigger than these few frames of a lame-3.70 file that aren't audible anyway
++ But still, I want to know if indeed this check or the old lame is at fault. */
++ error("You got some really nasty file there... region1>region2!");
++ return 1;
++}
++ 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=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 = DOUBLE_TO_REAL(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 = DOUBLE_TO_REAL(0.0);
++ xrpnt += step;
++ }
++ }
++
++ for(;l3 && (part2remain+num > 0);l3--) {
++ /* not mixing code and declarations to keep C89 happy */
++ struct newhuff* h;
++ register short* val;
++ register short a;
++ /* This is only a humble hack to prevent a special segfault. */
++ /* More insight into the real workings is still needed. */
++ /* especially why there are (valid?) files that make xrpnt exceed the array with 4 bytes without segfaulting, more seems to be really bad, though. */
++ #ifdef DEBUG
++ if(!(xrpnt < &xr[SBLIMIT][0]))
++ {
++ if(param.verbose) debug2("attempted soft xrpnt overflow (%p !< %p) ?", (void*) xrpnt, (void*) &xr[SBLIMIT][0]);
++ }
++ #endif
++ if(!(xrpnt < &xr[SBLIMIT][0]+5))
++ {
++ error2("attempted xrpnt overflow (%p !< %p)", (void*) xrpnt, (void*) &xr[SBLIMIT][0]);
++ return 2;
++ }
++ h = htc+gr_info->count1table_select;
++ val = h->table;
++
++ 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 = DOUBLE_TO_REAL(0.0);
++ xrpnt += step;
++ }
++ }
++
++ if(lwin < 3) { /* short band? */
++ while(1) {
++ for(;mc > 0;mc--) {
++ *xrpnt = DOUBLE_TO_REAL(0.0); xrpnt += 3; /* short band -> step=3 */
++ *xrpnt = DOUBLE_TO_REAL(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++;
++ if(cb == 21)
++ v = 0.0;
++ else
++ v = gr_info->pow2gain[((*scf++) + (*pretab++)) << shift];
++
++ }
++#if defined(MPG123_ARM_UNROLL_FIX)
++ {
++ register short *val = h->table;
++ REFRESH_MASK;
++ do {
++ arm_funroll_fix(val); val++;
++ y = arm_funroll_data;
++ if (y < 0) {
++ if (mask < 0)
++ val -= y;
++ num--;
++ mask <<= 1;
++ }
++ } while (y < 0);
++ x = y >> 4;
++ y &= 0xf;
++ }
++#else
++ {
++ register short *val = h->table;
++ REFRESH_MASK;
++ while((y=*val++)<0) {
++ if (mask < 0)
++ val -= y;
++ num--;
++ mask <<= 1;
++ }
++ x = y >> 4;
++ y &= 0xf;
++ }
++#endif
++
++ 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++ = DOUBLE_TO_REAL(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++ = DOUBLE_TO_REAL(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;
++#if defined(MPG123_ARM_UNROLL_FIX)
++ do {
++ arm_funroll_fix(val); val++;
++ a = arm_funroll_data;
++ if (a < 0) {
++ if (mask < 0)
++ val -= a;
++ num--;
++ mask <<= 1;
++ }
++ } while (a < 0);
++#else
++ while((a=*val++)<0) {
++ if (mask < 0)
++ val -= a;
++ num--;
++ mask <<= 1;
++ }
++#endif
++
++ 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++;
++ if(cb == 21)
++ v = 0.0;
++ else
++ 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++ = DOUBLE_TO_REAL(0.0);
++ }
++ }
++
++ gr_info->maxbandl = max+1;
++ gr_info->maxb = longLimit[sfreq][gr_info->maxbandl];
++ }
++
++ part2remain += num;
++ backbits(num);
++ num = 0;
++
++ while(xrpnt < &xr[SBLIMIT][0])
++ *xrpnt++ = DOUBLE_TO_REAL(0.0);
++
++ while( part2remain > 16 ) {
++ getbits(16); /* Dismiss stuffing Bits */
++ part2remain -= 16;
++ }
++ if(part2remain > 0)
++ getbits(part2remain);
++ else if(part2remain < 0) {
++ debug1("Can't rewind stream by %d bits!",-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];
++
++ const real *tab1,*tab2;
++
++#if 1
++ int tab;
++/* TODO: optimize as static */
++ 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];
++#else
++ 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
++
++ 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;
++ if(sfb > 21) return; /* similarity fix related to CVE-2006-1655 */
++ 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;
++ if(sfb > 21) return; /* tightened fix for CVE-2006-1655 */
++ 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] = 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);
++ }
++ }
++ } /* ... */
++}
++
++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 = REAL_MUL(bu, *cs) - REAL_MUL(bd, *ca);
++ *xr1++ = REAL_MUL(bd, *cs++) + REAL_MUL(bu, *ca++);
++ }
++ }
++ }
++}
++
++/*
++// This is an optimized DCT from Jeff Tsay's maplay 1.2+ package.
++// Saved one multiplication by doing the 'twiddle factor' stuff
++// together with the window mul. (MH)
++//
++// This uses Byeong Gi Lee's Fast Cosine Transform algorithm, but the
++// 9 point IDCT needs to be reduced further. Unfortunately, I don't
++// know how to do that, because 9 is not an even number. - Jeff.
++//
++//////////////////////////////////////////////////////////////////
++//
++// 9 Point Inverse Discrete Cosine Transform
++//
++// This piece of code is Copyright 1997 Mikko Tommila and is freely usable
++// by anybody. The algorithm itself is of course in the public domain.
++//
++// Again derived heuristically from the 9-point WFTA.
++//
++// The algorithm is optimized (?) for speed, not for small rounding errors or
++// good readability.
++//
++// 36 additions, 11 multiplications
++//
++// Again this is very likely sub-optimal.
++//
++// The code is optimized to use a minimum number of temporary variables,
++// so it should compile quite well even on 8-register Intel x86 processors.
++// This makes the code quite obfuscated and very difficult to understand.
++//
++// References:
++// [1] S. Winograd: "On Computing the Discrete Fourier Transform",
++// Mathematics of Computation, Volume 32, Number 141, January 1978,
++// Pages 175-199
++*/
++
++/*------------------------------------------------------------------*/
++/* */
++/* Function: Calculation of the inverse MDCT */
++/* */
++/*------------------------------------------------------------------*/
++/* used to be static without 3dnow - does that really matter? */
++void dct36(real *inbuf,real *o1,real *o2,real *wintab,real *tsbuf)
++{
++#ifdef NEW_DCT9
++ real tmp[18];
++#endif
++
++ {
++ 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];
++
++
++#ifdef NEW_DCT9
++#if 1
++ {
++ real t3;
++ {
++ real t0, t1, t2;
++
++ t0 = REAL_MUL(COS6_2, (in[8] + in[16] - in[4]));
++ t1 = REAL_MUL(COS6_2, in[12]);
++
++ t3 = in[0];
++ t2 = t3 - t1 - t1;
++ tmp[1] = tmp[7] = t2 - t0;
++ tmp[4] = t2 + t0 + t0;
++ t3 += t1;
++
++ t2 = REAL_MUL(COS6_1, (in[10] + in[14] - in[2]));
++ tmp[1] -= t2;
++ tmp[7] += t2;
++ }
++ {
++ real t0, t1, t2;
++
++ t0 = REAL_MUL(cos9[0], (in[4] + in[8] ));
++ t1 = REAL_MUL(cos9[1], (in[8] - in[16]));
++ t2 = REAL_MUL(cos9[2], (in[4] + in[16]));
++
++ tmp[2] = tmp[6] = t3 - t0 - t2;
++ tmp[0] = tmp[8] = t3 + t0 + t1;
++ tmp[3] = tmp[5] = t3 - t1 + t2;
++ }
++ }
++ {
++ real t1, t2, t3;
++
++ t1 = REAL_MUL(cos18[0], (in[2] + in[10]));
++ t2 = REAL_MUL(cos18[1], (in[10] - in[14]));
++ t3 = REAL_MUL(COS6_1, in[6]);
++
++ {
++ real t0 = t1 + t2 + t3;
++ tmp[0] += t0;
++ tmp[8] -= t0;
++ }
++
++ t2 -= t3;
++ t1 -= t3;
++
++ t3 = REAL_MUL(cos18[2], (in[2] + in[14]));
++
++ t1 += t3;
++ tmp[3] += t1;
++ tmp[5] -= t1;
++
++ t2 -= t3;
++ tmp[2] += t2;
++ tmp[6] -= t2;
++ }
++
++#else
++ {
++ real t0, t1, t2, t3, t4, t5, t6, t7;
++
++ t1 = REAL_MUL(COS6_2, in[12]);
++ t2 = REAL_MUL(COS6_2, (in[8] + in[16] - in[4]));
++
++ t3 = in[0] + t1;
++ t4 = in[0] - t1 - t1;
++ t5 = t4 - t2;
++ tmp[4] = t4 + t2 + t2;
++
++ t0 = REAL_MUL(cos9[0], (in[4] + in[8]));
++ t1 = REAL_MUL(cos9[1], (in[8] - in[16]));
++
++ t2 = REAL_MUL(cos9[2], (in[4] + in[16]));
++
++ t6 = t3 - t0 - t2;
++ t0 += t3 + t1;
++ t3 += t2 - t1;
++
++ t2 = REAL_MUL(cos18[0], (in[2] + in[10]));
++ t4 = REAL_MUL(cos18[1], (in[10] - in[14]));
++ t7 = REAL_MUL(COS6_1, in[6]);
++
++ t1 = t2 + t4 + t7;
++ tmp[0] = t0 + t1;
++ tmp[8] = t0 - t1;
++ t1 = REAL_MUL(cos18[2], (in[2] + in[14]));
++ t2 += t1 - t7;
++
++ tmp[3] = t3 + t2;
++ t0 = REAL_MUL(COS6_1, (in[10] + in[14] - in[2]));
++ tmp[5] = t3 - t2;
++
++ t4 -= t1 + t7;
++
++ tmp[1] = t5 - t0;
++ tmp[7] = t5 + t0;
++ tmp[2] = t6 + t4;
++ tmp[6] = t6 - t4;
++ }
++#endif
++
++ {
++ real t0, t1, t2, t3, t4, t5, t6, t7;
++
++ t1 = REAL_MUL(COS6_2, in[13]);
++ t2 = REAL_MUL(COS6_2, (in[9] + in[17] - in[5]));
++
++ t3 = in[1] + t1;
++ t4 = in[1] - t1 - t1;
++ t5 = t4 - t2;
++
++ t0 = REAL_MUL(cos9[0], (in[5] + in[9]));
++ t1 = REAL_MUL(cos9[1], (in[9] - in[17]));
++
++ tmp[13] = REAL_MUL((t4 + t2 + t2), tfcos36[17-13]);
++ t2 = REAL_MUL(cos9[2], (in[5] + in[17]));
++
++ t6 = t3 - t0 - t2;
++ t0 += t3 + t1;
++ t3 += t2 - t1;
++
++ t2 = REAL_MUL(cos18[0], (in[3] + in[11]));
++ t4 = REAL_MUL(cos18[1], (in[11] - in[15]));
++ t7 = REAL_MUL(COS6_1, in[7]);
++
++ t1 = t2 + t4 + t7;
++ tmp[17] = REAL_MUL((t0 + t1), tfcos36[17-17]);
++ tmp[9] = REAL_MUL((t0 - t1), tfcos36[17-9]);
++ t1 = REAL_MUL(cos18[2], (in[3] + in[15]));
++ t2 += t1 - t7;
++
++ tmp[14] = REAL_MUL((t3 + t2), tfcos36[17-14]);
++ t0 = REAL_MUL(COS6_1, (in[11] + in[15] - in[3]));
++ tmp[12] = REAL_MUL((t3 - t2), tfcos36[17-12]);
++
++ t4 -= t1 + t7;
++
++ tmp[16] = REAL_MUL((t5 - t0), tfcos36[17-16]);
++ tmp[10] = REAL_MUL((t5 + t0), tfcos36[17-10]);
++ tmp[15] = REAL_MUL((t6 + t4), tfcos36[17-15]);
++ tmp[11] = REAL_MUL((t6 - t4), tfcos36[17-11]);
++ }
++
++#define MACRO(v) { \
++ real tmpval; \
++ tmpval = tmp[(v)] + tmp[17-(v)]; \
++ out2[9+(v)] = REAL_MUL(tmpval, w[27+(v)]); \
++ out2[8-(v)] = REAL_MUL(tmpval, w[26-(v)]); \
++ tmpval = tmp[(v)] - tmp[17-(v)]; \
++ ts[SBLIMIT*(8-(v))] = out1[8-(v)] + REAL_MUL(tmpval, w[8-(v)]); \
++ ts[SBLIMIT*(9+(v))] = out1[9+(v)] + REAL_MUL(tmpval, w[9+(v)]); }
++
++{
++ register real *out2 = o2;
++ register real *w = wintab;
++ register real *out1 = o1;
++ register real *ts = tsbuf;
++
++ MACRO(0);
++ MACRO(1);
++ MACRO(2);
++ MACRO(3);
++ MACRO(4);
++ MACRO(5);
++ MACRO(6);
++ MACRO(7);
++ MACRO(8);
++}
++
++#else
++
++ {
++
++#define MACRO0(v) { \
++ real tmp; \
++ out2[9+(v)] = REAL_MUL((tmp = sum0 + sum1), w[27+(v)]); \
++ out2[8-(v)] = REAL_MUL(tmp, w[26-(v)]); } \
++ sum0 -= sum1; \
++ ts[SBLIMIT*(8-(v))] = out1[8-(v)] + REAL_MUL(sum0, w[8-(v)]); \
++ ts[SBLIMIT*(9+(v))] = out1[9+(v)] + REAL_MUL(sum0, w[9+(v)]);
++#define MACRO1(v) { \
++ real sum0,sum1; \
++ sum0 = tmp1a + tmp2a; \
++ sum1 = REAL_MUL((tmp1b + tmp2b), tfcos36[(v)]); \
++ MACRO0(v); }
++#define MACRO2(v) { \
++ real sum0,sum1; \
++ sum0 = tmp2a - tmp1a; \
++ sum1 = REAL_MUL((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 = REAL_MUL(in[2*3+0], c[3]);
++ ta66 = REAL_MUL(in[2*6+0], c[6]);
++ tb33 = REAL_MUL(in[2*3+1], c[3]);
++ tb66 = REAL_MUL(in[2*6+1], c[6]);
++
++ {
++ real tmp1a,tmp2a,tmp1b,tmp2b;
++ tmp1a = REAL_MUL(in[2*1+0], c[1]) + ta33 + REAL_MUL(in[2*5+0], c[5]) + REAL_MUL(in[2*7+0], c[7]);
++ tmp1b = REAL_MUL(in[2*1+1], c[1]) + tb33 + REAL_MUL(in[2*5+1], c[5]) + REAL_MUL(in[2*7+1], c[7]);
++ tmp2a = REAL_MUL(in[2*2+0], c[2]) + REAL_MUL(in[2*4+0], c[4]) + ta66 + REAL_MUL(in[2*8+0], c[8]);
++ tmp2b = REAL_MUL(in[2*2+1], c[2]) + REAL_MUL(in[2*4+1], c[4]) + tb66 + REAL_MUL(in[2*8+1], c[8]);
++
++ MACRO1(0);
++ MACRO2(8);
++ }
++
++ {
++ real tmp1a,tmp2a,tmp1b,tmp2b;
++ tmp1a = REAL_MUL(( in[2*1+0] - in[2*5+0] - in[2*7+0] ), c[3]);
++ tmp1b = REAL_MUL(( in[2*1+1] - in[2*5+1] - in[2*7+1] ), c[3]);
++ tmp2a = REAL_MUL(( in[2*2+0] - in[2*4+0] - in[2*8+0] ), c[6]) - in[2*6+0] + in[2*0+0];
++ tmp2b = REAL_MUL(( 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 = REAL_MUL(in[2*1+0], c[5]) - ta33 - REAL_MUL(in[2*5+0], c[7]) + REAL_MUL(in[2*7+0], c[1]);
++ tmp1b = REAL_MUL(in[2*1+1], c[5]) - tb33 - REAL_MUL(in[2*5+1], c[7]) + REAL_MUL(in[2*7+1], c[1]);
++ tmp2a = - REAL_MUL(in[2*2+0], c[8]) - REAL_MUL(in[2*4+0], c[2]) + ta66 + REAL_MUL(in[2*8+0], c[4]);
++ tmp2b = - REAL_MUL(in[2*2+1], c[8]) - REAL_MUL(in[2*4+1], c[2]) + tb66 + REAL_MUL(in[2*8+1], c[4]);
++
++ MACRO1(2);
++ MACRO2(6);
++ }
++
++ {
++ real tmp1a,tmp2a,tmp1b,tmp2b;
++ tmp1a = REAL_MUL(in[2*1+0], c[7]) - ta33 + REAL_MUL(in[2*5+0], c[1]) - REAL_MUL(in[2*7+0], c[5]);
++ tmp1b = REAL_MUL(in[2*1+1], c[7]) - tb33 + REAL_MUL(in[2*5+1], c[1]) - REAL_MUL(in[2*7+1], c[5]);
++ tmp2a = - REAL_MUL(in[2*2+0], c[4]) + REAL_MUL(in[2*4+0], c[8]) + ta66 - REAL_MUL(in[2*8+0], c[2]);
++ tmp2b = - REAL_MUL(in[2*2+1], c[4]) + REAL_MUL(in[2*4+1], c[8]) + tb66 - REAL_MUL(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 = REAL_MUL((in[2*0+1] - in[2*2+1] + in[2*4+1] - in[2*6+1] + in[2*8+1] ), tfcos36[4]);
++ MACRO0(4);
++ }
++ }
++#endif
++
++ }
++}
++
++/*
++ * 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 = REAL_MUL(in2, COS6_1); \
++ in3 = REAL_MUL(in3, COS6_1); \
++
++#define DCT12_PART2 \
++ in0 += REAL_MUL(in4, COS6_2); \
++ \
++ in4 = in0 + in2; \
++ in0 -= in2; \
++ \
++ in1 += REAL_MUL(in5, COS6_2); \
++ \
++ in5 = REAL_MUL((in1 + in3), tfcos12[0]); \
++ in1 = REAL_MUL((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 = REAL_MUL((in1 - in5), tfcos12[1]);
++ tmp0 = tmp1 + tmp2;
++ tmp1 -= tmp2;
++ }
++ ts[(17-1)*SBLIMIT] = out1[17-1] + REAL_MUL(tmp0, wi[11-1]);
++ ts[(12+1)*SBLIMIT] = out1[12+1] + REAL_MUL(tmp0, wi[6+1]);
++ ts[(6 +1)*SBLIMIT] = out1[6 +1] + REAL_MUL(tmp1, wi[1]);
++ ts[(11-1)*SBLIMIT] = out1[11-1] + REAL_MUL(tmp1, wi[5-1]);
++ }
++
++ DCT12_PART2
++
++ ts[(17-0)*SBLIMIT] = out1[17-0] + REAL_MUL(in2, wi[11-0]);
++ ts[(12+0)*SBLIMIT] = out1[12+0] + REAL_MUL(in2, wi[6+0]);
++ ts[(12+2)*SBLIMIT] = out1[12+2] + REAL_MUL(in3, wi[6+2]);
++ ts[(17-2)*SBLIMIT] = out1[17-2] + REAL_MUL(in3, wi[11-2]);
++
++ ts[(6 +0)*SBLIMIT] = out1[6+0] + REAL_MUL(in0, wi[0]);
++ ts[(11-0)*SBLIMIT] = out1[11-0] + REAL_MUL(in0, wi[5-0]);
++ ts[(6 +2)*SBLIMIT] = out1[6+2] + REAL_MUL(in4, wi[2]);
++ ts[(11-2)*SBLIMIT] = out1[11-2] + REAL_MUL(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 = REAL_MUL((in1 - in5), tfcos12[1]);
++ tmp0 = tmp1 + tmp2;
++ tmp1 -= tmp2;
++ }
++ out2[5-1] = REAL_MUL(tmp0, wi[11-1]);
++ out2[0+1] = REAL_MUL(tmp0, wi[6+1]);
++ ts[(12+1)*SBLIMIT] += REAL_MUL(tmp1, wi[1]);
++ ts[(17-1)*SBLIMIT] += REAL_MUL(tmp1, wi[5-1]);
++ }
++
++ DCT12_PART2
++
++ out2[5-0] = REAL_MUL(in2, wi[11-0]);
++ out2[0+0] = REAL_MUL(in2, wi[6+0]);
++ out2[0+2] = REAL_MUL(in3, wi[6+2]);
++ out2[5-2] = REAL_MUL(in3, wi[11-2]);
++
++ ts[(12+0)*SBLIMIT] += REAL_MUL(in0, wi[0]);
++ ts[(17-0)*SBLIMIT] += REAL_MUL(in0, wi[5-0]);
++ ts[(12+2)*SBLIMIT] += REAL_MUL(in4, wi[2]);
++ ts[(17-2)*SBLIMIT] += REAL_MUL(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 = REAL_MUL((in1 - in5), tfcos12[1]);
++ tmp0 = tmp1 + tmp2;
++ tmp1 -= tmp2;
++ }
++ out2[11-1] = REAL_MUL(tmp0, wi[11-1]);
++ out2[6 +1] = REAL_MUL(tmp0, wi[6+1]);
++ out2[0+1] += REAL_MUL(tmp1, wi[1]);
++ out2[5-1] += REAL_MUL(tmp1, wi[5-1]);
++ }
++
++ DCT12_PART2
++
++ out2[11-0] = REAL_MUL(in2, wi[11-0]);
++ out2[6 +0] = REAL_MUL(in2, wi[6+0]);
++ out2[6 +2] = REAL_MUL(in3, wi[6+2]);
++ out2[11-2] = REAL_MUL(in3, wi[11-2]);
++
++ out2[0+0] += REAL_MUL(in0, wi[0]);
++ out2[5-0] += REAL_MUL(in0, wi[5-0]);
++ out2[0+2] += REAL_MUL(in4, wi[2]);
++ out2[5-2] += REAL_MUL(in4, wi[5-2]);
++ }
++}
++
++/*
++ * III_hybrid
++ */
++static void III_hybrid(real fsIn[SBLIMIT][SSLIMIT], real tsOut[SSLIMIT][SBLIMIT], int ch,struct gr_info_s *gr_info)
++{
++ static real block[2][2][SBLIMIT*SSLIMIT] = { { { 0, } } };
++ static int blc[2]={0,0};
++
++ real *tspnt = (real *) tsOut;
++ real *rawout1,*rawout2;
++ int bt,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;
++ opt_dct36(fsIn[0],rawout1,rawout2,win[0],tspnt);
++ opt_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) {
++ opt_dct36(fsIn[sb],rawout1,rawout2,win[bt],tspnt);
++ opt_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++ = DOUBLE_TO_REAL(0.0);
++ }
++ }
++}
++
++
++/*
++ * main layer3 handler
++ */
++int do_layer3(struct frame *fr,int outmode,struct audio_info_struct *ai)
++{
++ int gr, ch, ss,clip=0;
++ int scalefacs[2][39]; /* max 39 for short[13][3] mode, mixed: 38, long: 22 */
++ struct III_sideinfo sideinfo;
++ int stereo = fr->stereo;
++ int single = fr->single;
++ int ms_stereo,i_stereo;
++ int sfreq = fr->sampling_frequency;
++ int stereo1,granules;
++
++ if(stereo == 1) { /* stream is mono */
++ stereo1 = 1;
++ single = 0;
++ }
++ else if(single >= 0) /* stream is stereo, but force to mono */
++ stereo1 = 1;
++ else
++ stereo1 = 2;
++
++ if(fr->mode == MPG_MD_JOINT_STEREO) {
++ ms_stereo = (fr->mode_ext & 0x2)>>1;
++ i_stereo = fr->mode_ext & 0x1;
++ }
++ else
++ ms_stereo = i_stereo = 0;
++
++ if(fr->lsf) {
++ granules = 1;
++#if 0
++ III_get_side_info_2(&sideinfo,stereo,ms_stereo,sfreq,single);
++#endif
++ }
++ else {
++ granules = 2;
++ }
++ /* quick hack to keep the music playing */
++ /* after having seen this nasty test file... */
++ if(III_get_side_info(&sideinfo,stereo,ms_stereo,sfreq,single,fr->lsf))
++ {
++ error("bad frame - unable to get valid sideinfo");
++ return clip;
++ }
++
++ set_pointer(sideinfo.main_data_begin);
++
++ 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
++ part2bits = III_get_scale_factors_1(scalefacs[0],gr_info,0,gr);
++
++ if(III_dequantize_sample(hybridIn[0], scalefacs[0],gr_info,sfreq,part2bits))
++ return clip;
++ }
++
++ if(stereo == 2) {
++ struct gr_info_s *gr_info = &(sideinfo.ch[1].gr[gr]);
++ long part2bits;
++ if(fr->lsf)
++ part2bits = III_get_scale_factors_2(scalefacs[1],gr_info,i_stereo);
++ else
++ part2bits = III_get_scale_factors_1(scalefacs[1],gr_info,1,gr);
++
++ if(III_dequantize_sample(hybridIn[1],scalefacs[1],gr_info,sfreq,part2bits))
++ return clip;
++
++ if(ms_stereo) {
++ int i;
++ int maxb = sideinfo.ch[0].gr[gr].maxb;
++ if(sideinfo.ch[1].gr[gr].maxb > maxb)
++ maxb = sideinfo.ch[1].gr[gr].maxb;
++ for(i=0;i<SSLIMIT*maxb;i++) {
++ real tmp0 = ((real *)hybridIn[0])[i];
++ real tmp1 = ((real *)hybridIn[1])[i];
++ ((real *)hybridIn[0])[i] = tmp0 + tmp1;
++ ((real *)hybridIn[1])[i] = tmp0 - tmp1;
++ }
++ }
++
++ if(i_stereo)
++ III_i_stereo(hybridIn,scalefacs[1],gr_info,sfreq,ms_stereo,fr->lsf);
++
++ if(ms_stereo || i_stereo || (single == 3) ) {
++ if(gr_info->maxb > sideinfo.ch[0].gr[gr].maxb)
++ sideinfo.ch[0].gr[gr].maxb = gr_info->maxb;
++ else
++ gr_info->maxb = sideinfo.ch[0].gr[gr].maxb;
++ }
++
++ switch(single) {
++ case 3:
++ {
++ register int i;
++ register real *in0 = (real *) hybridIn[0],*in1 = (real *) hybridIn[1];
++ for(i=0;i<SSLIMIT*gr_info->maxb;i++,in0++)
++ *in0 = (*in0 + *in1++); /* *0.5 done by pow-scale */
++ }
++ break;
++ case 1:
++ {
++ register int i;
++ register real *in0 = (real *) hybridIn[0],*in1 = (real *) hybridIn[1];
++ for(i=0;i<SSLIMIT*gr_info->maxb;i++)
++ *in0++ = *in1++;
++ }
++ break;
++ }
++ }
++
++ for(ch=0;ch<stereo1;ch++) {
++ struct gr_info_s *gr_info = &(sideinfo.ch[ch].gr[gr]);
++ III_antialias(hybridIn[ch],gr_info);
++ III_hybrid(hybridIn[ch], hybridOut[ch], ch,gr_info);
++ }
++
++#ifdef OPT_I486
++ if (fr->synth != opt_synth_1to1 || single >= 0) {
++#endif
++ for(ss=0;ss<SSLIMIT;ss++) {
++ if(single >= 0) {
++ clip += (fr->synth_mono)(hybridOut[0][ss],pcm_sample,&pcm_point);
++ }
++ else {
++ int p1 = pcm_point;
++ clip += (fr->synth)(hybridOut[0][ss],0,pcm_sample,&p1);
++ clip += (fr->synth)(hybridOut[1][ss],1,pcm_sample,&pcm_point);
++ }
++
++#ifdef VARMODESUPPORT
++ if (playlimit < 128) {
++ pcm_point -= playlimit >> 1;
++ playlimit = 0;
++ }
++ else
++ playlimit -= 128;
++#endif
++ if(pcm_point >= audiobufsize) audio_flush(outmode,ai);
++ }
++#ifdef OPT_I486
++ } else {
++ /* Only stereo, 16 bits benefit from the 486 optimization. */
++ ss=0;
++ while (ss < SSLIMIT) {
++ int n;
++ n=(audiobufsize - pcm_point) / (2*2*32);
++ if (n > (SSLIMIT-ss)) n=SSLIMIT-ss;
++
++ synth_1to1_486(hybridOut[0][ss],0,pcm_sample+pcm_point,n);
++ synth_1to1_486(hybridOut[1][ss],1,pcm_sample+pcm_point,n);
++ ss+=n;
++ pcm_point+=(2*2*32)*n;
++
++ if(pcm_point >= audiobufsize) audio_flush(outmode,ai);
++ }
++ }
++#endif
++ }
++
++ return clip;
++}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-17 14:32:17 +0000