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tdemultimedia/mpeglib/lib/splay/mpeglayer3.cpp

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/* MPEG/WAVE Sound library
(C) 1997 by Jung woo-jae */
// Mpeglayer3.cpp
// It's for MPEG Layer 3
// I've made array of superior functions for speed.
// Extend TO_FOUR_THIRDS to negative.
// Bug fix : maplay 1.2+ have wrong TO_FOUR_THIRDS ranges.
// Force to mono!!
// MPEG-2 is implemented
// Speed up in fixstereo (maybe buggy)
#include "mpegsound.h"
#include "huffmanlookup.h"
#include "dump.h"
#include "synthesis.h"
inline int Mpegtoraw::wgetbit (void) {return bitwindow.getbit (); }
inline int Mpegtoraw::wgetbits9(int bits){return bitwindow.getbits9(bits);}
inline int Mpegtoraw::wgetbits (int bits){return bitwindow.getbits (bits);}
inline int Mpegtoraw::wgetCanReadBits () {return bitwindow.getCanReadBits();}
#define MUL3(a) (((a)<<1)+(a))
#define REAL0 0
// 576
#define ARRAYSIZE (SBLIMIT*SSLIMIT)
#define REALSIZE (sizeof(REAL))
#define MAPLAY_OPT 1
#ifdef NATIVE_ASSEMBLY
inline void long_memset(void * s,unsigned int c,int count)
{
__asm__ __volatile__(
"cld\n\t"
"rep ; stosl\n\t"
: /* no output */
:"a" (c), "c" (count/4), "D" ((long) s)
:"cx","di","memory");
}
#endif
#define FOURTHIRDSTABLENUMBER (8250)
static int initializedlayer3=false;
static REAL two_to_negative_half_pow[70];
static REAL TO_FOUR_THIRDSTABLE[FOURTHIRDSTABLENUMBER*2];
static REAL POW2[256];
static REAL POW2_1[8][2][16];
static REAL ca[8],cs[8];
typedef struct
{
REAL l,r;
}RATIOS;
static RATIOS rat_1[16],rat_2[2][64];
void Mpegtoraw::layer3initialize(void)
{
int i,j,k,l;
//maplay opt.
nonzero[0] = nonzero[1] = nonzero[2]=ARRAYSIZE;
layer3framestart=0;
currentprevblock=0;
for(l=0;l<2;l++)
for(i=0;i<2;i++)
for(j=0;j<SBLIMIT;j++)
for(k=0;k<SSLIMIT;k++)
prevblck[l][i][j][k]=0.0f;
bitwindow.initialize();
if(initializedlayer3) {
return;
}
for(i=0;i<256;i++) {
POW2[i]=(REAL)pow((double)2.0,(0.25* (double) (i-210.0)));
}
REAL *TO_FOUR_THIRDS=TO_FOUR_THIRDSTABLE+FOURTHIRDSTABLENUMBER;
for(i=1;i<FOURTHIRDSTABLENUMBER;i++)
TO_FOUR_THIRDS[-i]=
-(TO_FOUR_THIRDS[i]=(REAL)pow((double)i,(double)4.0/3.0));
// now set the zero value for both (otherwise it would be -0.0)
TO_FOUR_THIRDS[0]=(REAL)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(1.0f+Ci[i]*Ci[i]);
cs[i]=1.0f/sq;
ca[i]=Ci[i]/sq;
}
initialize_win();
initialize_dct12_dct36();
for(i=0;i<70;i++) {
two_to_negative_half_pow[i]=(REAL)pow(2.0,-0.5*(double)i);
}
for(i=0;i<8;i++)
for(j=0;j<2;j++)
for(k=0;k<16;k++)POW2_1[i][j][k]=pow(2.0,(-2.0*i)-(0.5*(1.0+j)*k));
/*
for(i=0;i<8;i++)
for(k=0;k<16;k++) {
for(j=0;j<2;j++) {
REAL base=pow(2.0,-0.25*(j+1.0));
REAL val=1.0;
if (k>0) {
if ( k & 1) {
val=pow(base,(k+1.0)*0.5);
} else {
val=pow(base,k*0.5);
}
}
POW2_MV[i][j][k]=val;
}
}
for(i=0;i<8;i++)
for(j=0;j<2;j++)
for(k=0;k<16;k++) {
REAL a=POW2_1[i][j][k];
REAL b=POW2_MV[i][j][k];
printf("i:%d j%d k%d",i,j,k);
if (a != b) {
cout << "a:"<<a<<" b:"<<b<<endl;
} else {
cout << "same:"<<a<<endl;
}
}
*/
for(i=0;i<16;i++) {
double t = tan( (double) i * MY_PI / 12.0 );
rat_1[i].l=t / (1.0+t);
rat_1[i].r=1.0 /(1.0+t);
}
#define IO0 ((double)0.840896415256)
#define IO1 ((double)0.707106781188)
rat_2[0][0].l=rat_2[0][0].r=
rat_2[1][0].l=rat_2[1][0].r=1.;
for(i=1;i<64;i++) {
if((i%2)==1) {
rat_2[0][i].l=pow(IO0,(i+1)/2);
rat_2[1][i].l=pow(IO1,(i+1)/2);
rat_2[0][i].r=
rat_2[1][i].r=1.;
}
else {
rat_2[0][i].l=
rat_2[1][i].l=1.;
rat_2[0][i].r=pow(IO0,i/2);
rat_2[1][i].r=pow(IO1,i/2);
}
}
initializedlayer3=true;
}
bool Mpegtoraw::layer3getsideinfo(void) {
int inputstereo=mpegAudioHeader->getInputstereo();
sideinfo.main_data_begin=getbits(9);
if(!inputstereo)sideinfo.private_bits=getbits(5);
else sideinfo.private_bits=getbits(3);
sideinfo.ch[LS].scfsi[0]=getbit();
sideinfo.ch[LS].scfsi[1]=getbit();
sideinfo.ch[LS].scfsi[2]=getbit();
sideinfo.ch[LS].scfsi[3]=getbit();
if(inputstereo) {
sideinfo.ch[RS].scfsi[0]=getbit();
sideinfo.ch[RS].scfsi[1]=getbit();
sideinfo.ch[RS].scfsi[2]=getbit();
sideinfo.ch[RS].scfsi[3]=getbit();
}
for(int gr=0,ch;gr<2;gr++)
for(ch=0;;ch++) {
layer3grinfo *gi=&(sideinfo.ch[ch].gr[gr]);
gi->part2_3_length =getbits(12);
gi->big_values =getbits(9);
if(gi->big_values > 288) {
DEBUG_LAYER(fprintf(stderr,"big_values too large!\n");)
gi->big_values = 288;
return false;
}
gi->global_gain =getbits(8);
gi->scalefac_compress =getbits(4);
gi->window_switching_flag=getbit();
if(gi->window_switching_flag) {
gi->block_type =getbits(2);
gi->mixed_block_flag=getbit();
gi->table_select[0] =getbits(5);
gi->table_select[1] =getbits(5);
gi->subblock_gain[0]=getbits(3);
gi->subblock_gain[1]=getbits(3);
gi->subblock_gain[2]=getbits(3);
/* Set region_count parameters since they are implicit in this case. */
if(gi->block_type==0)
{
DEBUG_LAYER(printf("Side info bad: block_type==0 split block.\n");)
return false;
}
else if (gi->block_type==2 && gi->mixed_block_flag==0)
gi->region0_count=8; /* MI 9; */
else gi->region0_count=7; /* MI 8; */
gi->region1_count=20-(gi->region0_count);
}
else
{
gi->table_select[0] =getbits(5);
gi->table_select[1] =getbits(5);
gi->table_select[2] =getbits(5);
gi->region0_count =getbits(4);
gi->region1_count =getbits(3);
gi->block_type =0;
}
gi->preflag =getbit();
gi->scalefac_scale =getbit();
gi->count1table_select=getbit();
gi->generalflag=gi->window_switching_flag && (gi->block_type==2);
if(!inputstereo || ch)break;
}
return true;
}
bool Mpegtoraw::layer3getsideinfo_2(void) {
int inputstereo=mpegAudioHeader->getInputstereo();
sideinfo.main_data_begin=getbits(8);
if(!inputstereo)sideinfo.private_bits=getbit();
else sideinfo.private_bits=getbits(2);
for(int ch=0;;ch++)
{
layer3grinfo *gi=&(sideinfo.ch[ch].gr[0]);
gi->part2_3_length =getbits(12);
gi->big_values =getbits(9);
if(gi->big_values > 288) {
DEBUG_LAYER(fprintf(stderr,"big_values too large!\n");)
gi->big_values = 288;
return false;
}
gi->global_gain =getbits(8);
gi->scalefac_compress =getbits(9);
gi->window_switching_flag=getbit();
if(gi->window_switching_flag)
{
gi->block_type =getbits(2);
gi->mixed_block_flag=getbit();
gi->table_select[0] =getbits(5);
gi->table_select[1] =getbits(5);
gi->subblock_gain[0]=getbits(3);
gi->subblock_gain[1]=getbits(3);
gi->subblock_gain[2]=getbits(3);
/* Set region_count parameters since they are implicit in this case. */
if(gi->block_type==0)
{
DEBUG_LAYER(printf("Side info bad: block_type==0 split block.\n");)
return false;
}
else if (gi->block_type==2 && gi->mixed_block_flag==0)
gi->region0_count=8; /* MI 9; */
else gi->region0_count=7; /* MI 8; */
gi->region1_count=20-(gi->region0_count);
}
else
{
gi->table_select[0] =getbits(5);
gi->table_select[1] =getbits(5);
gi->table_select[2] =getbits(5);
gi->region0_count =getbits(4);
gi->region1_count =getbits(3);
gi->block_type =0;
}
gi->scalefac_scale =getbit();
gi->count1table_select=getbit();
gi->generalflag=gi->window_switching_flag && (gi->block_type==2);
if(!inputstereo || ch)break;
}
return true;
}
void Mpegtoraw::layer3getscalefactors(int ch,int gr)
{
static int 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}};
layer3grinfo *gi=&(sideinfo.ch[ch].gr[gr]);
layer3scalefactor *sf=(&scalefactors[ch]);
int l0,l1;
{
int scale_comp=gi->scalefac_compress;
l0=slen[0][scale_comp];
l1=slen[1][scale_comp];
}
/*
wgetCanReadBits();
cout << "lo:"<<l0<<" l1:"<<l1<<endl;
*/
if(gi->generalflag)
{
if(gi->mixed_block_flag)
{ /* MIXED */ /* NEW-ag 11/25 */
sf->l[0]=wgetbits9(l0);sf->l[1]=wgetbits9(l0);
sf->l[2]=wgetbits9(l0);sf->l[3]=wgetbits9(l0);
sf->l[4]=wgetbits9(l0);sf->l[5]=wgetbits9(l0);
sf->l[6]=wgetbits9(l0);sf->l[7]=wgetbits9(l0);
sf->s[0][ 3]=wgetbits9(l0);sf->s[1][ 3]=wgetbits9(l0);
sf->s[2][ 3]=wgetbits9(l0);
sf->s[0][ 4]=wgetbits9(l0);sf->s[1][ 4]=wgetbits9(l0);
sf->s[2][ 4]=wgetbits9(l0);
sf->s[0][ 5]=wgetbits9(l0);sf->s[1][ 5]=wgetbits9(l0);
sf->s[2][ 5]=wgetbits9(l0);
sf->s[0][ 6]=wgetbits9(l1);sf->s[1][ 6]=wgetbits9(l1);
sf->s[2][ 6]=wgetbits9(l1);
sf->s[0][ 7]=wgetbits9(l1);sf->s[1][ 7]=wgetbits9(l1);
sf->s[2][ 7]=wgetbits9(l1);
sf->s[0][ 8]=wgetbits9(l1);sf->s[1][ 8]=wgetbits9(l1);
sf->s[2][ 8]=wgetbits9(l1);
sf->s[0][ 9]=wgetbits9(l1);sf->s[1][ 9]=wgetbits9(l1);
sf->s[2][ 9]=wgetbits9(l1);
sf->s[0][10]=wgetbits9(l1);sf->s[1][10]=wgetbits9(l1);
sf->s[2][10]=wgetbits9(l1);
sf->s[0][11]=wgetbits9(l1);sf->s[1][11]=wgetbits9(l1);
sf->s[2][11]=wgetbits9(l1);
sf->s[0][12]=sf->s[1][12]=sf->s[2][12]=0;
}
else
{ /* SHORT*/
sf->s[0][ 0]=wgetbits9(l0);sf->s[1][ 0]=wgetbits9(l0);
sf->s[2][ 0]=wgetbits9(l0);
sf->s[0][ 1]=wgetbits9(l0);sf->s[1][ 1]=wgetbits9(l0);
sf->s[2][ 1]=wgetbits9(l0);
sf->s[0][ 2]=wgetbits9(l0);sf->s[1][ 2]=wgetbits9(l0);
sf->s[2][ 2]=wgetbits9(l0);
sf->s[0][ 3]=wgetbits9(l0);sf->s[1][ 3]=wgetbits9(l0);
sf->s[2][ 3]=wgetbits9(l0);
sf->s[0][ 4]=wgetbits9(l0);sf->s[1][ 4]=wgetbits9(l0);
sf->s[2][ 4]=wgetbits9(l0);
sf->s[0][ 5]=wgetbits9(l0);sf->s[1][ 5]=wgetbits9(l0);
sf->s[2][ 5]=wgetbits9(l0);
sf->s[0][ 6]=wgetbits9(l1);sf->s[1][ 6]=wgetbits9(l1);
sf->s[2][ 6]=wgetbits9(l1);
sf->s[0][ 7]=wgetbits9(l1);sf->s[1][ 7]=wgetbits9(l1);
sf->s[2][ 7]=wgetbits9(l1);
sf->s[0][ 8]=wgetbits9(l1);sf->s[1][ 8]=wgetbits9(l1);
sf->s[2][ 8]=wgetbits9(l1);
sf->s[0][ 9]=wgetbits9(l1);sf->s[1][ 9]=wgetbits9(l1);
sf->s[2][ 9]=wgetbits9(l1);
sf->s[0][10]=wgetbits9(l1);sf->s[1][10]=wgetbits9(l1);
sf->s[2][10]=wgetbits9(l1);
sf->s[0][11]=wgetbits9(l1);sf->s[1][11]=wgetbits9(l1);
sf->s[2][11]=wgetbits9(l1);
sf->s[0][12]=sf->s[1][12]=sf->s[2][12]=0;
}
}
else
{ /* LONG types 0,1,3 */
if(gr==0)
{
sf->l[ 0]=wgetbits9(l0);sf->l[ 1]=wgetbits9(l0);
sf->l[ 2]=wgetbits9(l0);sf->l[ 3]=wgetbits9(l0);
sf->l[ 4]=wgetbits9(l0);sf->l[ 5]=wgetbits9(l0);
sf->l[ 6]=wgetbits9(l0);sf->l[ 7]=wgetbits9(l0);
sf->l[ 8]=wgetbits9(l0);sf->l[ 9]=wgetbits9(l0);
sf->l[10]=wgetbits9(l0);
sf->l[11]=wgetbits9(l1);sf->l[12]=wgetbits9(l1);
sf->l[13]=wgetbits9(l1);sf->l[14]=wgetbits9(l1);
sf->l[15]=wgetbits9(l1);
sf->l[16]=wgetbits9(l1);sf->l[17]=wgetbits9(l1);
sf->l[18]=wgetbits9(l1);sf->l[19]=wgetbits9(l1);
sf->l[20]=wgetbits9(l1);
}
else
{
if(sideinfo.ch[ch].scfsi[0]==0)
{
sf->l[ 0]=wgetbits9(l0);sf->l[ 1]=wgetbits9(l0);
sf->l[ 2]=wgetbits9(l0);sf->l[ 3]=wgetbits9(l0);
sf->l[ 4]=wgetbits9(l0);sf->l[ 5]=wgetbits9(l0);
}
if(sideinfo.ch[ch].scfsi[1]==0)
{
sf->l[ 6]=wgetbits9(l0);sf->l[ 7]=wgetbits9(l0);
sf->l[ 8]=wgetbits9(l0);sf->l[ 9]=wgetbits9(l0);
sf->l[10]=wgetbits9(l0);
}
if(sideinfo.ch[ch].scfsi[2]==0)
{
sf->l[11]=wgetbits9(l1);sf->l[12]=wgetbits9(l1);
sf->l[13]=wgetbits9(l1);sf->l[14]=wgetbits9(l1);
sf->l[15]=wgetbits9(l1);
}
if(sideinfo.ch[ch].scfsi[3]==0)
{
sf->l[16]=wgetbits9(l1);sf->l[17]=wgetbits9(l1);
sf->l[18]=wgetbits9(l1);sf->l[19]=wgetbits9(l1);
sf->l[20]=wgetbits9(l1);
}
}
sf->l[21]=sf->l[22]=0;
}
/*
cout << "end parse:"<<endl;
wgetCanReadBits();
*/
}
void Mpegtoraw::layer3getscalefactors_2(int ch)
{
static int sfbblockindex[6][3][4]=
{
{{ 6, 5, 5, 5},{ 9, 9, 9, 9},{ 6, 9, 9, 9}},
{{ 6, 5, 7, 3},{ 9, 9,12, 6},{ 6, 9,12, 6}},
{{11,10, 0, 0},{18,18, 0, 0},{15,18, 0, 0}},
{{ 7, 7, 7, 0},{12,12,12, 0},{ 6,15,12, 0}},
{{ 6, 6, 6, 3},{12, 9, 9, 6},{ 6,12, 9, 6}},
{{ 8, 8, 5, 0},{15,12, 9, 0},{ 6,18, 9, 0}}
};
int sb[54];
int extendedmode=mpegAudioHeader->getExtendedmode();
layer3grinfo *gi=&(sideinfo.ch[ch].gr[0]);
layer3scalefactor *sf=(&scalefactors[ch]);
{
int blocktypenumber,sc;
int blocknumber;
int slen[4];
if(gi->block_type==2)blocktypenumber=1+gi->mixed_block_flag;
else blocktypenumber=0;
sc=gi->scalefac_compress;
if(!((extendedmode==1 || extendedmode==3) && (ch==1)))
{
if(sc<400)
{
slen[0]=(sc>>4)/5;
slen[1]=(sc>>4)%5;
slen[2]=(sc%16)>>2;
slen[3]=(sc%4);
gi->preflag=0;
blocknumber=0;
}
else if(sc<500)
{
sc-=400;
slen[0]=(sc>>2)/5;
slen[1]=(sc>>2)%5;
slen[2]=sc%4;
slen[3]=0;
gi->preflag=0;
blocknumber=1;
}
else // if(sc<512)
{
sc-=500;
slen[0]=sc/3;
slen[1]=sc%3;
slen[2]=0;
slen[3]=0;
gi->preflag=1;
blocknumber=2;
}
}
else
{
sc>>=1;
if(sc<180)
{
slen[0]=sc/36;
slen[1]=(sc%36)/6;
slen[2]=(sc%36)%6;
slen[3]=0;
gi->preflag=0;
blocknumber=3;
}
else if(sc<244)
{
sc-=180;
slen[0]=(sc%64)>>4;
slen[1]=(sc%16)>>2;
slen[2]=sc%4;
slen[3]=0;
gi->preflag=0;
blocknumber=4;
}
else // if(sc<255)
{
sc-=244;
slen[0]=sc/3;
slen[1]=sc%3;
slen[2]=
slen[3]=0;
gi->preflag=0;
blocknumber=5;
}
}
{
int i,j,k,*si;
si=sfbblockindex[blocknumber][blocktypenumber];
for(i=0;i<45;i++)sb[i]=0;
for(k=i=0;i<4;i++)
for(j=0;j<si[i];j++,k++)
if(slen[i]==0)sb[k]=0;
else sb[k]=wgetbits(slen[i]);
}
}
{
int sfb,window;
int k=0;
if(gi->window_switching_flag && (gi->block_type==2))
{
if(gi->mixed_block_flag)
{
for(sfb=0;sfb<8;sfb++)sf->l[sfb]=sb[k++];
sfb=3;
}
else sfb=0;
for(;sfb<12;sfb++)
for(window=0;window<3;window++)
sf->s[window][sfb]=sb[k++];
sf->s[0][12]=sf->s[1][12]=sf->s[2][12]=0;
}
else
{
for(sfb=0;sfb<21;sfb++)
sf->l[sfb]=sb[k++];
sf->l[21]=sf->l[22]=0;
}
}
}
typedef unsigned int HUFFBITS;
#define MXOFF 250
/* do the huffman-decoding */
/* note! for counta,countb -the 4 bit value is returned in y, discard x */
// Huffman decoder for tablename<32
inline void Mpegtoraw::huffmandecoder_1(const HUFFMANCODETABLE *h,int *x,int *y)
{
HUFFBITS level=(1<<(sizeof(HUFFBITS)*8-1));
int point=0;
/* Lookup in Huffman table. */
for(;;)
{
if(h->val[point][0]==0)
{ /*end of tree*/
int xx,yy;
xx=h->val[point][1]>>4;
yy=h->val[point][1]&0xf;
if(h->linbits)
{
if((h->xlen)==(unsigned)xx)xx+=wgetbits(h->linbits);
if(xx)if(wgetbit())xx=-xx;
if((h->ylen)==(unsigned)yy)yy+=wgetbits(h->linbits);
if(yy)if(wgetbit())yy=-yy;
}
else
{
if(xx)if(wgetbit())xx=-xx;
if(yy)if(wgetbit())yy=-yy;
}
*x=xx;*y=yy;
break;
}
point+=h->val[point][wgetbit()];
level>>=1;
if(!(level || ((unsigned)point<ht->treelen)))
{
int xx,yy;
xx=(h->xlen<<1);// set x and y to a medium value as a simple concealment
yy=(h->ylen<<1);
// h->xlen and h->ylen can't be 1 under tablename 32
// if(xx)
if(wgetbit())xx=-xx;
// if(yy)
if(wgetbit())yy=-yy;
*x=xx;*y=yy;
break;
}
}
}
// Huffman decoder tablenumber>=32
inline void Mpegtoraw::huffmandecoder_2(const HUFFMANCODETABLE *h,
int *x,int *y,int *v,int *w)
{
HUFFBITS level=(1<<(sizeof(HUFFBITS)*8-1));
int point=0;
/* Lookup in Huffman table. */
for(;;)
{
if(h->val[point][0]==0)
{ /*end of tree*/
int t=h->val[point][1];
if(t&8)*v=1-(wgetbit()<<1); else *v=0;
if(t&4)*w=1-(wgetbit()<<1); else *w=0;
if(t&2)*x=1-(wgetbit()<<1); else *x=0;
if(t&1)*y=1-(wgetbit()<<1); else *y=0;
break;
}
point+=h->val[point][wgetbit()];
level>>=1;
if(!(level || ((unsigned)point<ht->treelen)))
{
*v=1-(wgetbit()<<1);
*w=1-(wgetbit()<<1);
*x=1-(wgetbit()<<1);
*y=1-(wgetbit()<<1);
break;
}
}
}
typedef struct
{
int l[23];
int s[14];
}SFBANDINDEX;
static SFBANDINDEX sfBandIndextable[3][3]=
{
// MPEG 1
{{{0,4,8,12,16,20,24,30,36,44,52,62,74,90,110,134,162,196,238,288,342,418,576},
{0,4,8,12,16,22,30,40,52,66,84,106,136,192}},
{{0,4,8,12,16,20,24,30,36,42,50,60,72,88,106,128,156,190,230,276,330,384,576},
{0,4,8,12,16,22,28,38,50,64,80,100,126,192}},
{{0,4,8,12,16,20,24,30,36,44,54,66,82,102,126,156,194,240,296,364,448,550,576},
{0,4,8,12,16,22,30,42,58,78,104,138,180,192}}},
// MPEG 2
{{{0,6,12,18,24,30,36,44,54,66,80,96,116,140,168,200,238,284,336,396,464,522,576},
{0,4,8,12,18,24,32,42,56,74,100,132,174,192}},
{{0,6,12,18,24,30,36,44,54,66,80,96,114,136,162,194,232,278,330,394,464,540,576},
{0,4,8,12,18,26,36,48,62,80,104,136,180,192}},
{{0,6,12,18,24,30,36,44,54,66,80,96,116,140,168,200,238,284,336,396,464,522,576},
{0,4,8,12,18,26,36,48,62,80,104,134,174,192}}},
// 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},
{0,4,8,12,18,26,36,48,62,80,104,134,174,192}},
{{0,6,12,18,24,30,36,44,54,66,80,96,116,140,168,200,238,284,336,396,464,522,576},
{0,4,8,12,18,26,36,48,62,80,104,134,174,192}},
{{0,12,24,36,48,60,72,88,108,132,160,192,232,280,336,400,476,566,568,570,572,574,576},
{0,8,16,24,36,52,72,96,124,160,162,164,166,192}}}
};
void Mpegtoraw::layer3huffmandecode(int ch,int gr,int out[SBLIMIT][SSLIMIT])
{
layer3grinfo *gi=&(sideinfo.ch[ch].gr[gr]);
int part2_3_end=layer3part2start+(gi->part2_3_length);
int region1Start,region2Start;
int i,e=gi->big_values<<1;
int version=mpegAudioHeader->getVersion();
int frequency=mpegAudioHeader->getFrequency();
int mpeg25=mpegAudioHeader->getLayer25();
/* Find region boundary for short block case. */
if(gi->generalflag) {
/* Region2. */
region1Start=
sfBandIndextable[mpeg25?2:version][frequency].s[3]*3;
/* MPEG1:sfb[9/3]*3=36 */
region2Start=576;/* No Region2 for short block case. */
} else {
/* Find region boundary for long block case. */
region1Start=
sfBandIndextable[mpeg25?2:version][frequency].l[gi->region0_count+1];
region2Start=
sfBandIndextable[mpeg25?2:version][frequency].l[gi->region0_count+
gi->region1_count+2];
}
/* Read bigvalues area. */
for(i=0;i<e;)
{
const HUFFMANCODETABLE *h;
int end;
if (i<region1Start)
{
h=&ht[gi->table_select[0]];
if(region1Start>e)end=e; else end=region1Start;
}
else if(i<region2Start)
{
h=&ht[gi->table_select[1]];
if(region2Start>e)end=e; else end=region2Start;
}
else
{
h=&ht[gi->table_select[2]];
end=e;
}
if(h->treelen) {
while(i<end)
{
int skip = HuffmanLookup::decode(h->tablename, bitwindow.peek8(),
&out[0][i], &out[0][i+1]);
if(skip)
bitwindow.forward(skip);
else
huffmandecoder_1(h,&out[0][i],&out[0][i+1]);
i+=2;
}
} else {
for(;i<end;i+=2)
out[0][i] =
out[0][i+1]=0;
}
}
/* Read count1 area. */
const HUFFMANCODETABLE *h=&ht[gi->count1table_select+32];
while(bitwindow.gettotalbit()<part2_3_end)
{
huffmandecoder_2(h,&out[0][i+2],&out[0][i+3],
&out[0][i ],&out[0][i+1]);
i+=4;
if(i>=ARRAYSIZE)
{
break;
}
}
// nonzero is the _size_ of the array with the last nonzero value
if (i < ARRAYSIZE) {
nonzero[ch] = i;
} else {
// catch bugs
nonzero[ch] = ARRAYSIZE;
}
// debug start
#ifndef MAPLAY_OPT
nonzero[ch]=ARRAYSIZE;
for(;i<ARRAYSIZE;i++)out[0][i]=0;
#endif
// debug end
bitwindow.rewind(bitwindow.gettotalbit()-part2_3_end);
}
static int pretab[22]={0,0,0,0,0,0,0,0,0,0,0,1,1,1,1,2,2,3,3,3,2,0};
inline REAL Mpegtoraw::layer3twopow2(int scale,int preflag,
int pretab_offset,int l)
{
int index=l;
if(preflag)index+=pretab_offset;
return(two_to_negative_half_pow[index<<scale]);
}
inline REAL Mpegtoraw::layer3twopow2_1(int a,int b,int c)
{
return POW2_1[a][b][c];
}
void Mpegtoraw::layer3dequantizesample(int ch,int gr,
int in[SBLIMIT][SSLIMIT],
REAL out[SBLIMIT][SSLIMIT])
{
int version=mpegAudioHeader->getVersion();
int frequency=mpegAudioHeader->getFrequency();
int mpeg25=mpegAudioHeader->getLayer25();
layer3grinfo *gi=&(sideinfo.ch[ch].gr[gr]);
SFBANDINDEX *sfBandIndex=&(sfBandIndextable[mpeg25?2:version][frequency]);
REAL globalgain=POW2[gi->global_gain];
REAL *TO_FOUR_THIRDS=TO_FOUR_THIRDSTABLE+FOURTHIRDSTABLENUMBER;
int arrayEnd=nonzero[ch];
/* choose correct scalefactor band per block type, initialize boundary */
/* and apply formula per block type */
if(!gi->generalflag) {
/* LONG blocks: 0,1,3 */
int next_cb_boundary;
int cb=-1,index=0;
REAL factor;
do
{
next_cb_boundary=sfBandIndex->l[(++cb)+1];
REAL val=layer3twopow2(gi->scalefac_scale,gi->preflag,
pretab[cb],scalefactors[ch].l[cb]);
factor=globalgain*val;
// maplay opt
if (arrayEnd < next_cb_boundary) {
next_cb_boundary=arrayEnd;
}
for(;index<next_cb_boundary;)
{
out[0][index]=factor*TO_FOUR_THIRDS[in[0][index]];index++;
out[0][index]=factor*TO_FOUR_THIRDS[in[0][index]];index++;
}
}while(index<arrayEnd);
} else if(!gi->mixed_block_flag) {
int cb=0,index=0;
int cb_width;
do
{
cb_width=(sfBandIndex->s[cb+1]-sfBandIndex->s[cb])>>1;
for(int k=0;k<3;k++)
{
REAL factor;
int count=cb_width;
// maplay12 opt.
if(index+(count<<1) > arrayEnd) {
if (index >= arrayEnd) break;
count=(arrayEnd-index)>>1;
}
factor=globalgain*
layer3twopow2_1(gi->subblock_gain[k],gi->scalefac_scale,
scalefactors[ch].s[k][cb]);
do{
out[0][index]=factor*TO_FOUR_THIRDS[in[0][index]];index++;
out[0][index]=factor*TO_FOUR_THIRDS[in[0][index]];index++;
}while(--count);
}
cb++;
}while(index<arrayEnd);
} else {
int cb_begin=0,cb_width=0;
int cb=0;
int next_cb_boundary=sfBandIndex->l[1]; /* LONG blocks: 0,1,3 */
int index;
// I do not have an mp3 with this format,
// so we restore the "make rest of array zero"
// in this case
// to use the maplay opt here, we must make sure, that
// arrayEnd==ArraySize.
for(int i=arrayEnd;i<ARRAYSIZE;i++)in[0][i]=0;
/* Compute overall (global) scaling. */
{
for(int sb=0;sb<SBLIMIT;sb++)
{
int *i=in[sb];
REAL *o=out[sb];
o[ 0]=globalgain*TO_FOUR_THIRDS[i[ 0]];
o[ 1]=globalgain*TO_FOUR_THIRDS[i[ 1]];
o[ 2]=globalgain*TO_FOUR_THIRDS[i[ 2]];
o[ 3]=globalgain*TO_FOUR_THIRDS[i[ 3]];
o[ 4]=globalgain*TO_FOUR_THIRDS[i[ 4]];
o[ 5]=globalgain*TO_FOUR_THIRDS[i[ 5]];
o[ 6]=globalgain*TO_FOUR_THIRDS[i[ 6]];
o[ 7]=globalgain*TO_FOUR_THIRDS[i[ 7]];
o[ 8]=globalgain*TO_FOUR_THIRDS[i[ 8]];
o[ 9]=globalgain*TO_FOUR_THIRDS[i[ 9]];
o[10]=globalgain*TO_FOUR_THIRDS[i[10]];
o[11]=globalgain*TO_FOUR_THIRDS[i[11]];
o[12]=globalgain*TO_FOUR_THIRDS[i[12]];
o[13]=globalgain*TO_FOUR_THIRDS[i[13]];
o[14]=globalgain*TO_FOUR_THIRDS[i[14]];
o[15]=globalgain*TO_FOUR_THIRDS[i[15]];
o[16]=globalgain*TO_FOUR_THIRDS[i[16]];
o[17]=globalgain*TO_FOUR_THIRDS[i[17]];
}
}
for(index=0;index<SSLIMIT*2;index++)
{
if(index==next_cb_boundary)
{
if(index==sfBandIndex->l[8])
{
next_cb_boundary=sfBandIndex->s[4];
next_cb_boundary=MUL3(next_cb_boundary);
cb=3;
cb_width=sfBandIndex->s[4]-sfBandIndex->s[3];
cb_begin=sfBandIndex->s[3];
cb_begin=MUL3(cb_begin);
}
else if(index<sfBandIndex->l[8])
next_cb_boundary=sfBandIndex->l[(++cb)+1];
else
{
next_cb_boundary=sfBandIndex->s[(++cb)+1];
next_cb_boundary=MUL3(next_cb_boundary);
cb_begin=sfBandIndex->s[cb];
cb_width=sfBandIndex->s[cb+1]-cb_begin;
cb_begin=MUL3(cb_begin);
}
}
/* LONG block types 0,1,3 & 1st 2 subbands of switched blocks */
out[0][index]*=layer3twopow2(gi->scalefac_scale,gi->preflag,
pretab[cb],scalefactors[ch].l[cb]);
}
for(;index<ARRAYSIZE;index++) {
if(index==next_cb_boundary) {
if(index==sfBandIndex->l[8]) {
next_cb_boundary=sfBandIndex->s[4];
next_cb_boundary=MUL3(next_cb_boundary);
cb=3;
cb_width=sfBandIndex->s[4]-sfBandIndex->s[3];
cb_begin=sfBandIndex->s[3];
cb_begin=(cb_begin<<2)-cb_begin;
} else if(index<sfBandIndex->l[8])
next_cb_boundary=sfBandIndex->l[(++cb)+1];
else {
next_cb_boundary=sfBandIndex->s[(++cb)+1];
next_cb_boundary=MUL3(next_cb_boundary);
cb_begin=sfBandIndex->s[cb];
cb_width=sfBandIndex->s[cb+1]-cb_begin;
cb_begin=MUL3(cb_begin);
}
}
{
/**
Here we check if we do a division by zero
and if the resulting t_index points
outside the array. (Needed for better robustness
of the mp3 decoder)
*/
unsigned int t_index=0;
if (cb_width) {
t_index=(unsigned int)((index-cb_begin)/cb_width);
if (t_index > 2) {
t_index=0;
}
}
out[0][index]*=layer3twopow2_1(gi->subblock_gain[t_index],
gi->scalefac_scale,
scalefactors[ch].s[t_index][cb]);
}
}
}
/*
int i;
for(i=arrayEnd;i<ARRAYSIZE;i++) {
out[0][i]=(REAL) 0.0;
}
*/
}
// make the input to nonzero[2] zero
inline void Mpegtoraw::adjustNonZero(REAL in[2][SBLIMIT][SSLIMIT]) {
if ((nonzero[0] == 0) && (nonzero[1]==0)) {
in[RS][0][0]=(REAL) 0.0;
in[LS][0][0]=(REAL) 0.0;
nonzero[0]=1;
nonzero[1]=1;
nonzero[2]=1;
return;
}
while(nonzero[0] > nonzero[1]) {
in[RS][0][nonzero[1]]=(REAL) 0.0;
nonzero[1]++;
}
while(nonzero[1] > nonzero[0]) {
in[LS][0][nonzero[0]]=(REAL) 0.0;
nonzero[0]++;
}
// now they are the same
// put this into the "max" var.
nonzero[2]=nonzero[1];
}
inline void Mpegtoraw::layer3fixtostereo(int gr,REAL in[2][SBLIMIT][SSLIMIT])
{
int version=mpegAudioHeader->getVersion();
int frequency=mpegAudioHeader->getFrequency();
int extendedmode=mpegAudioHeader->getExtendedmode();
int mode=mpegAudioHeader->getMode();
int inputstereo=mpegAudioHeader->getInputstereo();
int mpeg25=mpegAudioHeader->getLayer25();
layer3grinfo *gi=&(sideinfo.ch[0].gr[gr]);
SFBANDINDEX *sfBandIndex=&(sfBandIndextable[mpeg25?2:version][frequency]);
int ms_stereo=(mode==_MODE_JOINT) && (extendedmode & 0x2);
int i_stereo =(mode==_MODE_JOINT) && (extendedmode & 0x1);
if(!inputstereo)
{ /* mono , bypass xr[0][][] to lr[0][][]*/
// memcpy(out[0][0],in[0][0],ARRAYSIZE*REALSIZE);
for(int i=nonzero[0];i<ARRAYSIZE;i++) {
in[LS][0][i]=(REAL) 0.0;
}
return;
}
// maplay opt.
adjustNonZero(in);
int maxArray=nonzero[2];
if(i_stereo)
{
// not maplay optimised make defaults
int i;
for(i=maxArray;i<ARRAYSIZE;i++) {
in[LS][0][i]=in[RS][0][i]=(REAL) 0.0;
}
int is_pos[ARRAYSIZE];
RATIOS is_ratio[ARRAYSIZE];
RATIOS *ratios;
if(version)ratios=rat_2[gi->scalefac_compress%2];
else ratios=rat_1;
/* initialization */
for(i=0;i<ARRAYSIZE;i+=2)is_pos[i]=is_pos[i+1]=7;
if(gi->generalflag)
{
if(gi->mixed_block_flag) // Part I
{
int max_sfb=0;
for(int j=0;j<3;j++)
{
int sfb,sfbcnt=2;
for(sfb=12;sfb>=3;sfb--)
{
int lines;
i=sfBandIndex->s[sfb];
lines=sfBandIndex->s[sfb+1]-i;
i=MUL3(i)+(j+1)*lines-1;
for(;lines>0;lines--,i--)
if(in[1][0][i]!=0.0f)
{
sfbcnt=sfb;
sfb=0;break; // quit loop
}
}
sfb=sfbcnt+1;
if(sfb>max_sfb)max_sfb=sfb;
for(;sfb<12;sfb++)
{
int k,t;
t=sfBandIndex->s[sfb];
k=sfBandIndex->s[sfb+1]-t;
i=MUL3(t)+j*k;
t=scalefactors[1].s[j][sfb];
if(t!=7)
{
RATIOS r=ratios[t];
for(;k>0;k--,i++){
is_pos[i]=t;is_ratio[i]=r;}
}
else
for(;k>0;k--,i++)is_pos[i]=t;
}
sfb=sfBandIndex->s[10];
sfb=MUL3(sfb)+j*(sfBandIndex->s[11]-sfb);
{
int k,t;
t=sfBandIndex->s[11];
k=sfBandIndex->s[12]-t;
i=MUL3(t)+j*k;
t=is_pos[sfb];
if(t!=7)
{
RATIOS r=is_ratio[sfb];
for(;k>0;k--,i++){
is_pos[i]=t;is_ratio[i]=r;}
}
else
for(;k>0;k--,i++)is_pos[i]=t;
}
}
if(max_sfb<=3)
{
{
REAL temp;
int k;
temp=in[1][0][0];in[1][0][0]=1.0;
for(k=3*SSLIMIT-1;in[1][0][k]==0.0;k--);
in[1][0][0]=temp;
for(i=0;sfBandIndex->l[i]<=k;i++);
}
{
int sfb=i;
i=sfBandIndex->l[i];
for(;sfb<8;sfb++)
{
int t=scalefactors[1].l[sfb];
int k=sfBandIndex->l[sfb+1]-sfBandIndex->l[sfb];
if(t!=7)
{
RATIOS r=ratios[t];
for(;k>0;k--,i++){
is_pos[i]=t;is_ratio[i]=r;}
}
else for(;k>0;k--,i++)is_pos[i]=t;
}
}
}
}
else // Part II
{
for(int j=0;j<3;j++)
{
int sfbcnt=-1;
int sfb;
for(sfb=12;sfb>=0;sfb--)
{
int lines;
{
int t;
t=sfBandIndex->s[sfb];
lines=sfBandIndex->s[sfb+1]-t;
i=MUL3(t)+(j+1)*lines-1;
}
for(;lines>0;lines--,i--)
if(in[1][0][i]!=0.0f)
{
sfbcnt=sfb;
sfb=0;break; // quit loop
}
}
for(sfb=sfbcnt+1;sfb<12;sfb++)
{
int k,t;
t=sfBandIndex->s[sfb];
k=sfBandIndex->s[sfb+1]-t;
i=MUL3(t)+j*k;
t=scalefactors[1].s[j][sfb];
if(t!=7)
{
RATIOS r=ratios[t];
for(;k>0;k--,i++){
is_pos[i]=t;is_ratio[i]=r;}
}
else for(;k>0;k--,i++)is_pos[i]=t;
}
{
int t1=sfBandIndex->s[10],
t2=sfBandIndex->s[11];
int k,tt;
tt=MUL3(t1)+j*(t2-t1);
k =sfBandIndex->s[12]-t2;
if(is_pos[tt]!=7)
{
RATIOS r=is_ratio[tt];
int t=is_pos[tt];
i =MUL3(t1)+j*k;
for(;k>0;k--,i++){
is_pos[i]=t;is_ratio[i]=r;}
}
else
for(;k>0;k--,i++)is_pos[i]=7;
}
}
}
}
else // ms-stereo (Part III)
{
{
REAL temp;
int k;
temp=in[1][0][0];in[1][0][0]=1.0;
for(k=ARRAYSIZE-1;in[1][0][k]==0.0;k--);
in[1][0][0]=temp;
for(i=0;sfBandIndex->l[i]<=k;i++);
}
{
int sfb;
sfb=i;
i=sfBandIndex->l[i];
for(;sfb<21;sfb++)
{
int k,t;
k=sfBandIndex->l[sfb+1]-sfBandIndex->l[sfb];
t=scalefactors[1].l[sfb];
if(t!=7)
{
RATIOS r=ratios[t];
for(;k>0;k--,i++){
is_pos[i]=t;is_ratio[i]=r;}
}
else
for(;k>0;k--,i++)is_pos[i]=t;
}
}
{
int k,t,tt;
tt=sfBandIndex->l[20];
k=576-sfBandIndex->l[21];
t=is_pos[tt];
if(t!=7)
{
RATIOS r=is_ratio[tt];
for(;k>0;k--,i++){
is_pos[i]=t;is_ratio[i]=r;}
}
else
for(;k>0;k--,i++)is_pos[i]=t;
}
}
if(ms_stereo)
{
i=ARRAYSIZE-1;
do{
if(is_pos[i]==7)
{
REAL t=in[LS][0][i];
in[LS][0][i]=(t+in[RS][0][i])*0.7071068f;
in[RS][0][i]=(t-in[RS][0][i])*0.7071068f;
}
else
{
in[RS][0][i]=in[LS][0][i]*is_ratio[i].r;
in[LS][0][i]*=is_ratio[i].l;
}
}while(i--);
}
else
{
i=ARRAYSIZE-1;
do{
if(is_pos[i]!=7)
{
in[RS][0][i]=in[LS][0][i]*is_ratio[i].r;
in[LS][0][i]*=is_ratio[i].l;
}
}while(i--);
}
}
else
{
if(ms_stereo)
{
int i=maxArray-1;
do{
REAL t=in[LS][0][i];
in[LS][0][i]=(t+in[RS][0][i])*0.7071068f;
in[RS][0][i]=(t-in[RS][0][i])*0.7071068f;
}while(i--);
}
for(int i=maxArray;i<ARRAYSIZE;i++) {
in[LS][0][i]=in[RS][0][i]=(REAL) 0.0;
}
}
// channels==2
}
inline void layer3reorder_1(int version,int frequency,
REAL in[SBLIMIT][SSLIMIT],
REAL out[SBLIMIT][SSLIMIT])
{
SFBANDINDEX *sfBandIndex=&(sfBandIndextable[version][frequency]);
int sfb,sfb_start,sfb_lines;
/* NO REORDER FOR LOW 2 SUBBANDS */
out[0][ 0]=in[0][ 0];out[0][ 1]=in[0][ 1];out[0][ 2]=in[0][ 2];
out[0][ 3]=in[0][ 3];out[0][ 4]=in[0][ 4];out[0][ 5]=in[0][ 5];
out[0][ 6]=in[0][ 6];out[0][ 7]=in[0][ 7];out[0][ 8]=in[0][ 8];
out[0][ 9]=in[0][ 9];out[0][10]=in[0][10];out[0][11]=in[0][11];
out[0][12]=in[0][12];out[0][13]=in[0][13];out[0][14]=in[0][14];
out[0][15]=in[0][15];out[0][16]=in[0][16];out[0][17]=in[0][17];
out[1][ 0]=in[1][ 0];out[1][ 1]=in[1][ 1];out[1][ 2]=in[1][ 2];
out[1][ 3]=in[1][ 3];out[1][ 4]=in[1][ 4];out[1][ 5]=in[1][ 5];
out[1][ 6]=in[1][ 6];out[1][ 7]=in[1][ 7];out[1][ 8]=in[1][ 8];
out[1][ 9]=in[1][ 9];out[1][10]=in[1][10];out[1][11]=in[1][11];
out[1][12]=in[1][12];out[1][13]=in[1][13];out[1][14]=in[1][14];
out[1][15]=in[1][15];out[1][16]=in[1][16];out[1][17]=in[1][17];
/* REORDERING FOR REST SWITCHED SHORT */
for(sfb=3,sfb_start=sfBandIndex->s[3],
sfb_lines=sfBandIndex->s[4]-sfb_start;
sfb<13;
sfb++,sfb_start=sfBandIndex->s[sfb],
(sfb_lines=sfBandIndex->s[sfb+1]-sfb_start))
{
for(int freq=0;freq<sfb_lines;freq++)
{
int src_line=sfb_start+(sfb_start<<1)+freq;
int des_line=src_line+(freq<<1);
out[0][des_line ]=in[0][src_line ];
out[0][des_line+1]=in[0][src_line+sfb_lines ];
out[0][des_line+2]=in[0][src_line+(sfb_lines<<1)];
}
}
}
inline void layer3reorder_2(int version,int frequency,REAL in[SBLIMIT][SSLIMIT],
REAL out[SBLIMIT][SSLIMIT])
{
SFBANDINDEX *sfBandIndex=&(sfBandIndextable[version][frequency]);
int sfb,sfb_start,sfb_lines;
for(sfb=0,sfb_start=0,sfb_lines=sfBandIndex->s[1];
sfb<13;
sfb++,sfb_start=sfBandIndex->s[sfb],
(sfb_lines=sfBandIndex->s[sfb+1]-sfb_start))
{
for(int freq=0;freq<sfb_lines;freq++)
{
int src_line=sfb_start+(sfb_start<<1)+freq;
int des_line=src_line+(freq<<1);
out[0][des_line ]=in[0][src_line ];
out[0][des_line+1]=in[0][src_line+sfb_lines ];
out[0][des_line+2]=in[0][src_line+(sfb_lines<<1)];
}
}
}
inline void layer3antialias_1(REAL in[SBLIMIT][SSLIMIT])
{
for(int ss=0;ss<8;ss++)
{
REAL bu,bd; /* upper and lower butterfly inputs */
bu=in[0][17-ss];bd=in[1][ss];
in[0][17-ss]=(bu*cs[ss])-(bd*ca[ss]);
in[1][ss] =(bd*cs[ss])+(bu*ca[ss]);
}
}
inline
void layer3antialias_2(REAL in[SBLIMIT][SSLIMIT],
REAL out[SBLIMIT][SSLIMIT])
{
out[0][0]=in[0][0];out[0][1]=in[0][1];
out[0][2]=in[0][2];out[0][3]=in[0][3];
out[0][4]=in[0][4];out[0][5]=in[0][5];
out[0][6]=in[0][6];out[0][7]=in[0][7];
for(int index=SSLIMIT;index<=(SBLIMIT-1)*SSLIMIT;index+=SSLIMIT)
{
for(int n=0;n<8;n++)
{
REAL bu,bd;
bu=in[0][index-n-1];bd=in[0][index+n];
out[0][index-n-1]=(bu*cs[n])-(bd*ca[n]);
out[0][index+n ]=(bd*cs[n])+(bu*ca[n]);
}
out[0][index-SSLIMIT+8]=in[0][index-SSLIMIT+8];
out[0][index-SSLIMIT+9]=in[0][index-SSLIMIT+9];
}
out[31][ 8]=in[31][ 8];out[31][ 9]=in[31][ 9];
out[31][10]=in[31][10];out[31][11]=in[31][11];
out[31][12]=in[31][12];out[31][13]=in[31][13];
out[31][14]=in[31][14];out[31][15]=in[31][15];
out[31][16]=in[31][16];out[31][17]=in[31][17];
}
void Mpegtoraw::layer3reorderandantialias(int ch,int gr,
REAL in[SBLIMIT][SSLIMIT],
REAL out[SBLIMIT][SSLIMIT])
{
int version=mpegAudioHeader->getVersion();
int frequency=mpegAudioHeader->getFrequency();
int mpeg25=mpegAudioHeader->getLayer25();
layer3grinfo *gi=&(sideinfo.ch[ch].gr[gr]);
if(gi->generalflag) {
if(gi->mixed_block_flag) {
layer3reorder_1 (mpeg25?2:version,frequency,in,out); // Not checked...
layer3antialias_1(out);
}
else {
layer3reorder_2(mpeg25?2:version,frequency,in,out);
}
}
else {
layer3antialias_2(in,out);
}
}
#include "dct36_12.cpp"
#include "window.cpp"
void Mpegtoraw::layer3hybrid(int ch,int gr,REAL in[SBLIMIT][SSLIMIT],
REAL out[SSLIMIT][SBLIMIT])
{
layer3grinfo *gi=&(sideinfo.ch[ch].gr[gr]);
int bt1,bt2;
REAL *prev1,*prev2;
prev1=prevblck[ch][currentprevblock][0];
prev2=prevblck[ch][currentprevblock^1][0];
bt1 = gi->mixed_block_flag ? 0 : gi->block_type;
bt2 = gi->block_type;
{
REAL *ci=(REAL *)in,
*co=(REAL *)out;
int i;
if(lDownSample)i=(SBLIMIT/2)-2;
else i=SBLIMIT-2;
if(bt2==2)
{
if(!bt1)
{
dct36(ci,prev1,prev2,getSplayWindow(0),co);
ci+=SSLIMIT;prev1+=SSLIMIT;prev2+=SSLIMIT;co++;
dct36(ci,prev1,prev2,getSplayWindowINV(0),co);
}
else
{
dct12(ci,prev1,prev2,getSplayWindow(2),co);
ci+=SSLIMIT;prev1+=SSLIMIT;prev2+=SSLIMIT;co++;
dct12(ci,prev1,prev2,getSplayWindowINV(2),co);
}
do{
ci+=SSLIMIT;prev1+=SSLIMIT;prev2+=SSLIMIT;co++;
dct12(ci,prev1,prev2,getSplayWindow(2),co);
i--;
ci+=SSLIMIT;prev1+=SSLIMIT;prev2+=SSLIMIT;co++;
dct12(ci,prev1,prev2,getSplayWindowINV(2),co);
}while(--i);
}
else
{
dct36(ci,prev1,prev2,getSplayWindow(bt1),co);
ci+=SSLIMIT;prev1+=SSLIMIT;prev2+=SSLIMIT;co++;
dct36(ci,prev1,prev2,getSplayWindowINV(bt1),co);
do
{
ci+=SSLIMIT;prev1+=SSLIMIT;prev2+=SSLIMIT;co++;
dct36(ci,prev1,prev2,getSplayWindow(bt2),co);
i--;
ci+=SSLIMIT;prev1+=SSLIMIT;prev2+=SSLIMIT;co++;
dct36(ci,prev1,prev2,getSplayWindowINV(bt2),co);
}while(--i);
}
}
}
void Mpegtoraw::extractlayer3(void) {
int version=mpegAudioHeader->getVersion();
int inputstereo=mpegAudioHeader->getInputstereo();
int layer3slots=mpegAudioHeader->getLayer3slots();
if(version) {
extractlayer3_2();
return;
}
{
int main_data_end,flush_main;
int bytes_to_discard;
if (layer3getsideinfo() == false) {
return;
}
// read main data.
if(issync()) {
for(int i=layer3slots;i>0;i--) {
bitwindow.putbyte(getbyte());
}
} else {
// read main data.
for(int i=layer3slots;i>0;i--) {
bitwindow.putbyte(getbits8());
}
}
main_data_end=bitwindow.gettotalbit()>>3;// of previous frame
if (main_data_end < 0) {
DEBUG_LAYER(printf("main_data_end < 0\n");)
return;
}
if((flush_main=(bitwindow.gettotalbit() & 0x7))) {
bitwindow.forward(8-flush_main);
main_data_end++;
}
bytes_to_discard=layer3framestart-(main_data_end+sideinfo.main_data_begin);
if(main_data_end>WINDOWSIZE) {
layer3framestart-=WINDOWSIZE;
bitwindow.rewind(WINDOWSIZE*8);
}
layer3framestart+=layer3slots;
bitwindow.wrap();
if(bytes_to_discard<0) return;
bitwindow.forward(bytes_to_discard<<3);
}
for(int gr=0;gr<2;gr++) {
ATTR_ALIGN(64) union
{
int is [SBLIMIT][SSLIMIT];
REAL hin [2][SBLIMIT][SSLIMIT];
}b1;
ATTR_ALIGN(64) union
{
REAL ro [2][SBLIMIT][SSLIMIT];
REAL lr [2][SBLIMIT][SSLIMIT];
REAL hout [2][SSLIMIT][SBLIMIT];
}b2;
layer3part2start=bitwindow.gettotalbit();
layer3getscalefactors (LS,gr);
layer3huffmandecode (LS,gr ,b1.is);
layer3dequantizesample(LS,gr,b1.is,b2.ro[LS]);
//dump->dump(b2.ro[LS]);
if(inputstereo) {
layer3part2start=bitwindow.gettotalbit();
layer3getscalefactors (RS,gr);
layer3huffmandecode (RS,gr ,b1.is);
layer3dequantizesample(RS,gr,b1.is,b2.ro[RS]);
}
layer3fixtostereo(gr,b2.ro); // b2.ro -> b2.lr
currentprevblock^=1;
layer3reorderandantialias(LS,gr,b2.lr[LS],b1.hin[LS]);
//dump->dump(b1.hin[LS]);
layer3hybrid (LS,gr,b1.hin[LS],b2.hout[LS]);
//dump->dump(b2.hout[LS]);
if(lOutputStereo) {
layer3reorderandantialias(RS,gr,b2.lr[RS],b1.hin[RS]);
layer3hybrid (RS,gr,b1.hin[RS],b2.hout[RS]);
}
synthesis->doMP3Synth(lDownSample,lOutputStereo,b2.hout);
}
}
void Mpegtoraw::extractlayer3_2(void) {
int inputstereo=mpegAudioHeader->getInputstereo();
int layer3slots=mpegAudioHeader->getLayer3slots();
{
int main_data_end,flush_main;
int bytes_to_discard;
if (layer3getsideinfo_2() == false) {
return;
}
// read main data.
if(issync()) {
for(int i=layer3slots;i>0;i--) {
bitwindow.putbyte(getbyte());
}
}
else {
// read main data.
for(int i=layer3slots;i>0;i--) {
bitwindow.putbyte(getbits8());
}
}
//bitwindow.wrap();
main_data_end=bitwindow.gettotalbit()>>3;// of previous frame
if (main_data_end < 0) {
DEBUG_LAYER(printf("main_data_end < 0\n");)
return;
}
if((flush_main=(bitwindow.gettotalbit() & 0x7))) {
bitwindow.forward(8-flush_main);
main_data_end++;
}
bytes_to_discard=layer3framestart-(main_data_end+sideinfo.main_data_begin);
if(main_data_end>WINDOWSIZE) {
layer3framestart-=WINDOWSIZE;
bitwindow.rewind(WINDOWSIZE*8);
}
layer3framestart+=layer3slots;
bitwindow.wrap();
if(bytes_to_discard<0)return;
bitwindow.forward(bytes_to_discard<<3);
}
//for(int gr=0;gr<2;gr++) {
ATTR_ALIGN(64) union
{
int is [SBLIMIT][SSLIMIT];
REAL hin [2][SBLIMIT][SSLIMIT];
}b1;
ATTR_ALIGN(64) union
{
REAL ro [2][SBLIMIT][SSLIMIT];
REAL lr [2][SBLIMIT][SSLIMIT];
REAL hout [2][SSLIMIT][SBLIMIT];
}b2;
layer3part2start=bitwindow.gettotalbit();
layer3getscalefactors_2(LS);
//dump->dump(&scalefactors[LS]);
layer3huffmandecode (LS,0 ,b1.is);
//dump->dump(b1.is);
layer3dequantizesample (LS,0,b1.is,b2.ro[LS]);
if(inputstereo) {
layer3part2start=bitwindow.gettotalbit();
layer3getscalefactors_2(RS);
layer3huffmandecode (RS,0 ,b1.is);
layer3dequantizesample (RS,0,b1.is,b2.ro[RS]);
}
layer3fixtostereo(0,b2.ro); // b2.ro -> b2.lr
currentprevblock^=1;
layer3reorderandantialias(LS,0,b2.lr[LS],b1.hin[LS]);
layer3hybrid (LS,0,b1.hin[LS],b2.hout[LS]);
if(lOutputStereo) {
layer3reorderandantialias(RS,0,b2.lr[RS],b1.hin[RS]);
layer3hybrid (RS,0,b1.hin[RS],b2.hout[RS]);
}
synthesis->doMP3Synth(lDownSample,lOutputStereo,b2.hout);
}
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