l3psy.c
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上传日期:2007-01-08
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文件大小:25k
- /*
- (c) Copyright 1998, 1999 - Tord Jansson
- =======================================
- This file is part of the BladeEnc MP3 Encoder, based on
- ISO's reference code for MPEG Layer 3 compression, and might
- contain smaller or larger sections that are directly taken
- from ISO's reference code.
- All changes to the ISO reference code herein are either
- copyrighted by Tord Jansson (tord.jansson@swipnet.se)
- or sublicensed to Tord Jansson by a third party.
- BladeEnc is free software; you can redistribute this file
- and/or modify it under the terms of the GNU Lesser General Public
- License as published by the Free Software Foundation; either
- version 2.1 of the License, or (at your option) any later version.
- */
- #include <stdlib.h>
- #include "common.h"
- #include "encoder.h"
- #include "l3psy.h"
- #include "l3side.h"
- #define maximum(x,y) ( (x>y) ? x : y )
- #define minimum(x,y) ( (x<y) ? x : y )
- /*____ Global Static Variables ______________________________________________*/
- static double ratio[2][21];
- static double ratio_s[2][12][3];
- /* The static variables "r", "phi_sav", "new_", "old" and "oldest" have */
- /* to be remembered for the unpredictability measure. For "r" and */
- /* "phi_sav", the first index from the left is the channel select and */
- /* the second index is the "age" of the data. */
- static FLOAT window_s[BLKSIZE_s] ;
- static int new_ = 0, old = 1, oldest = 0;
- static int flush, sync_flush, syncsize, sfreq_idx;
- static double cw[HBLKSIZE], eb[CBANDS];
- static double ctb[CBANDS];
- static double SNR_l[CBANDS], SNR_s[CBANDS_s];
- static double minval[CBANDS],qthr_l[CBANDS],norm_l[CBANDS];
- static double qthr_s[CBANDS_s],norm_s[CBANDS_s];
- static double nb_1[2][CBANDS], nb_2[2][CBANDS];
- static double s3_l[CBANDS][CBANDS]; /* s3_s[CBANDS_s][CBANDS_s]; */
- /* Scale Factor Bands */
- static int cbw_l[SBMAX_l],bu_l[SBMAX_l],bo_l[SBMAX_l] ;
- static int cbw_s[SBMAX_s],bu_s[SBMAX_s],bo_s[SBMAX_s] ;
- static double w1_l[SBMAX_l], w2_l[SBMAX_l];
- static double w1_s[SBMAX_s], w2_s[SBMAX_s];
- static double en[SBMAX_l], thm[SBMAX_l] ;
- static int blocktype_old[2] ;
- static int partition_l[HBLKSIZE],partition_s[HBLKSIZE_s];
- /* The following static variables are constants. */
- static float crit_band[27] = {0, 100, 200, 300, 400, 510, 630, 770,
- 920, 1080, 1270,1480,1720,2000,2320, 2700,
- 3150, 3700, 4400,5300,6400,7700,9500,12000,
- 15500,25000,30000};
- /* The following pointer variables point to large areas of memory */
- /* dynamically allocated by the mem_alloc() function. Dynamic memory */
- /* allocation is used in order to avoid stack frame or data area */
- /* overflow errors that otherwise would have occurred at compile time */
- /* on the Macintosh computer. */
- static FLOAT energy_s[3][256];
- static FLOAT phi_s[3][256] ; /* 256 samples not 129 */
- static int *numlines ;
- static int *partition;
- static FLOAT *cbval, *rnorm;
- static FLOAT *window;
- static FLOAT *absthr;
- static double *tmn;
- static FCB *s;
- static FHBLK *lthr;
- static F2HBLK *r, *phi_sav;
- /*____ read_absthr() ________________________________________________________*/
- void read_absthr(float * absthr, int table)
- {
- float * pSource;
- int j;
- switch(table)
- {
- case 0 :
- pSource = absthr_0;
- break;
- case 1 :
- pSource = absthr_1;
- break;
- case 2 :
- pSource = absthr_2;
- break;
- default :
- printf("absthr table: Not valid table numbern");
- return;
- }
- for(j=0; j<HBLKSIZE; j++)
- absthr[j] = pSource[j];
- }
- void L3para_read( int sfreq, int numlines[CBANDS], int partition_l[HBLKSIZE],
- double minval[CBANDS], double qthr_l[CBANDS], double norm_l[CBANDS],
- double s3_l[CBANDS][CBANDS], int partition_s[HBLKSIZE_s], double qthr_s[CBANDS_s],
- double norm_s[CBANDS_s], double SNR_s[CBANDS_s],
- int cbw_l[SBMAX_l], int bu_l[SBMAX_l], int bo_l[SBMAX_l],
- double w1_l[SBMAX_l], double w2_l[SBMAX_l],
- int cbw_s[SBMAX_s], int bu_s[SBMAX_s], int bo_s[SBMAX_s],
- double w1_s[SBMAX_s], double w2_s[SBMAX_s] );
- /*____ psycho_anal_init() ___________________________________________________*/
- void psycho_anal_init( double sfreq )
- {
- unsigned int i, j;
- float freq_mult, bval_lo;
- double temp1,temp2,temp3;
- float fthr[sizeof(FHBLK)/4];
- new_ = 0;
- old = 1;
- oldest = 0;
- for( i = 0 ; i < 21 ; i++ )
- {
- ratio[0][i] = 0.0;
- ratio[1][i] = 0.0;
- }
- for( i = 0 ; i < 2 ; i++ )
- for( j = 0 ; j < 12 ; j++ )
- {
- ratio_s[i][j][0] = 0.0;
- ratio_s[i][j][0] = 0.0;
- ratio_s[i][j][0] = 0.0;
- }
- /* These dynamic memory allocations simulate "static" variables placed */
- /* in the data space. Each mem_alloc() call here occurs only once at */
- /* initialization time. The mem_free() function must not be called. */
- numlines = (int *) mem_alloc(sizeof(ICB), "numlines");
- partition = (int *) mem_alloc(sizeof(IHBLK), "partition");
- cbval = (FLOAT *) mem_alloc(sizeof(FCB), "cbval");
- rnorm = (FLOAT *) mem_alloc(sizeof(FCB), "rnorm");
- window = (FLOAT *) mem_alloc(sizeof(FBLK), "window");
- absthr = (FLOAT *) mem_alloc(sizeof(FHBLK), "absthr");
- tmn = (double *) mem_alloc(sizeof(DCB), "tmn");
- s = (FCB *) mem_alloc(sizeof(FCBCB), "s");
- lthr = (FHBLK *) mem_alloc(sizeof(F2HBLK), "lthr");
- r = (F2HBLK *) mem_alloc(sizeof(F22HBLK), "r");
- phi_sav = (F2HBLK *) mem_alloc(sizeof(F22HBLK), "phi_sav");
- /*#if 0 */
- i = sfreq + 0.5;
- switch(i)
- {
- case 32000:
- sfreq_idx = 0;
- break;
- case 44100:
- sfreq_idx = 1;
- break;
- case 48000:
- sfreq_idx = 2;
- break;
- /* default: printf("error, invalid sampling frequency: %d Hzn",i);
- exit(-1); */
- }
- read_absthr(absthr, sfreq_idx);
- sync_flush=768;
- flush=576;
- syncsize=1344;
- /* calculate HANN window coefficients */
- for(i=0;i<BLKSIZE;i++)
- window[i] =0.5*(1-cos(2.0*PI*(i-0.5)/BLKSIZE));
- for(i=0;i<BLKSIZE_s;i++)
- window_s[i]=0.5*(1-cos(2.0*PI*(i-0.5)/BLKSIZE_s));
- /* reset states used in unpredictability measure */
- for(i=0;i<HBLKSIZE;i++)
- {
- r[0][0][i]=r[1][0][i]=r[0][1][i]=r[1][1][i]=0;
- phi_sav[0][0][i]=phi_sav[1][0][i]=0;
- phi_sav[0][1][i]=phi_sav[1][1][i]=0;
- lthr[0][i] = 60802371420160.0;
- lthr[1][i] = 60802371420160.0;
- }
- /*****************************************************************************
- * Initialization: Compute the following constants for use later *
- * partition[HBLKSIZE] = the partition number associated with each *
- * frequency line *
- * cbval[CBANDS] = the center (average) bark value of each *
- * partition *
- * numlines[CBANDS] = the number of frequency lines in each partition *
- * tmn[CBANDS] = tone masking noise *
- *****************************************************************************/
- /* compute fft frequency multiplicand */
- freq_mult = sfreq/BLKSIZE;
- /* calculate fft frequency, then bval of each line (use fthr[] as tmp storage)*/
- for(i=0;i<HBLKSIZE;i++)
- {
- temp1 = i*freq_mult;
- j = 1;
- while(temp1>crit_band[j])
- j++;
- fthr[i]=j-1+(temp1-crit_band[j-1])/(crit_band[j]-crit_band[j-1]);
- }
- partition[0] = 0;
- /* temp2 is the counter of the number of frequency lines in each partition */
- temp2 = 1;
- cbval[0]=fthr[0];
- bval_lo=fthr[0];
- for(i=1;i<HBLKSIZE;i++)
- {
- if((fthr[i]-bval_lo)>0.33)
- {
- partition[i]=partition[i-1]+1;
- cbval[partition[i-1]] = cbval[partition[i-1]]/temp2;
- cbval[partition[i]] = fthr[i];
- bval_lo = fthr[i];
- numlines[partition[i-1]] = temp2;
- temp2 = 1;
- }
- else
- {
- partition[i]=partition[i-1];
- cbval[partition[i]] += fthr[i];
- temp2++;
- }
- }
- numlines[partition[i-1]] = temp2;
- cbval[partition[i-1]] = cbval[partition[i-1]]/temp2;
- /************************************************************************
- * Now compute the spreading function, s[j][i], the value of the spread-*
- * ing function, centered at band j, for band i, store for later use *
- ************************************************************************/
- for(j=0;j<CBANDS;j++)
- {
- for(i=0;i<CBANDS;i++)
- {
- temp1 = (cbval[i] - cbval[j])*1.05;
- if(temp1>=0.5 && temp1<=2.5)
- {
- temp2 = temp1 - 0.5;
- temp2 = 8.0 * (temp2*temp2 - 2.0 * temp2);
- }
- else
- temp2 = 0;
- temp1 += 0.474;
- temp3 = 15.811389+7.5*temp1-17.5*sqrt((double) (1.0+temp1*temp1));
- if(temp3 <= -100)
- s[i][j] = 0;
- else
- {
- temp3 = (temp2 + temp3)*LN_TO_LOG10;
- s[i][j] = exp(temp3);
- }
- }
- }
- /* Calculate Tone Masking Noise values */
- for(j=0;j<CBANDS;j++)
- {
- temp1 = 15.5 + cbval[j];
- tmn[j] = (temp1>24.5) ? temp1 : 24.5;
- /* Calculate normalization factors for the net spreading functions */
- rnorm[j] = 0;
- for(i=0;i<CBANDS;i++)
- {
- rnorm[j] += s[j][i];
- }
- }
- L3para_read( (int)sfreq,numlines,partition_l,minval,qthr_l,norm_l,s3_l,
- partition_s,qthr_s,norm_s,SNR_s,
- cbw_l,bu_l,bo_l,w1_l,w2_l, cbw_s,bu_s,bo_s,w1_s,w2_s );
- }
- /*____ psycho_anal_exit() ___________________________________________________*/
- void psycho_anal_exit( void )
- {
- free( numlines );
- free( partition );
- free( cbval );
- free( rnorm );
- free( window );
- free( absthr );
- free( tmn );
- free( s );
- free( lthr );
- free( r );
- free( phi_sav );
- }
- /*____ psycho_anal() ________________________________________________________*/
-
- void psycho_anal( short int *buffer, short int savebuf[1344], int chn, int lay, float snr32[32],
- double ratio_d[21], double ratio_ds[12][3],
- double *pe, gr_info *cod_info )
- {
- int blocktype;
- unsigned int b, i, j, k;
- double r_prime, phi_prime; /* not FLOAT */
- double temp1,temp2,temp3;
- double thr[CBANDS];
- int sb,sblock;
- float nb[sizeof(FCB)/4];
- float cb[sizeof(FCB)/4];
- float ecb[sizeof(FCB)/4];
- float bc[sizeof(FCB)/4];
- float wsamp_r[sizeof(FBLK)/4];
- float wsamp_i[sizeof(FBLK)/4];
- float phi[sizeof(FBLK)/4];
- float energy[sizeof(FBLK)/4];
- float c[sizeof(FHBLK)/4];
- float fthr[sizeof(FHBLK)/4];
- F32 snrtmp[2];
- memset(nb, 0, sizeof(FCB));
- memset(cb, 0, sizeof(FCB));
- memset(ecb, 0, sizeof(FCB));
- memset(bc, 0, sizeof(FCB));
- memset(wsamp_r, 0, sizeof(FBLK));
- memset(wsamp_i, 0, sizeof(FBLK));
- memset(phi, 0, sizeof(FBLK));
- memset(energy, 0, sizeof(FBLK));
- memset(c, 0, sizeof(FHBLK));
- memset(fthr, 0, sizeof(FHBLK));
- memset(snrtmp, 0, sizeof(F32)*2);
-
- for ( j = 0; j < 21; j++ )
- ratio_d[j] = ratio[chn][j];
- for ( j = 0; j < 12; j++ )
- for ( i = 0; i < 3; i++ )
- ratio_ds[j][i] = ratio_s[chn][j][i];
-
- if ( chn == 0 )
- {
- if ( new_ == 0 )
- {
- new_ = 1;
- old = 0;
- oldest = 1;
- }
- else
- {
- new_ = 0;
- old = 1;
- oldest = 0;
- }
- }
- /**********************************************************************
- * Delay signal by sync_flush=768 samples *
- **********************************************************************/
-
- for ( j = 0; j < sync_flush; j++ ) /* for long window samples */
- savebuf[j] = savebuf[j+flush];
-
- for ( j = sync_flush; j < syncsize; j++ )
- savebuf[j] = *buffer++;
-
- for ( j = 0; j < BLKSIZE; j++ )
- { /**window data with HANN window**/
- wsamp_r[j] = window[j] * savebuf[j];
- wsamp_i[j] = 0.0;
- }
- /**********************************************************************
- * compute unpredicatability of first six spectral lines *
- **********************************************************************/
- fft( wsamp_r, wsamp_i, energy, phi, 1024 ); /**long FFT**/
- for ( j = 0; j < 6; j++ )
- { /* calculate unpredictability measure cw */
- r_prime = 2.0 * r[chn][old][j] - r[chn][oldest][j];
- phi_prime = 2.0 * phi_sav[chn][old][j]-phi_sav[chn][oldest][j];
- r[chn][new_][j] = sqrt((double) energy[j]);
- phi_sav[chn][new_][j] = phi[j];
- temp1 = r[chn][new_][j] * cos((double) phi[j]) - r_prime * cos(phi_prime);
- temp2 = r[chn][new_][j] * sin((double) phi[j]) - r_prime * sin(phi_prime);
- temp3=r[chn][new_][j] + fabs(r_prime);
-
- if ( temp3 != 0.0 )
- cw[j] = sqrt( temp1*temp1+temp2*temp2 ) / temp3;
- else
- cw[j] = 0;
- }
- /**********************************************************************
- * compute unpredicatibility of next 200 spectral lines *
- **********************************************************************/
- for ( sblock = 0; sblock < 3; sblock++ )
- { /**window data with HANN window**/
- for ( j = 0, k = 128 * (2 + sblock); j < 256; j++, k++ )
- {
- wsamp_r[j] = window_s[j]* savebuf[k];
- wsamp_i[j] = 0.0;
- } /* short FFT*/
-
- fft( wsamp_r, wsamp_i, &energy_s[sblock][0], &phi_s[sblock][0], 256 );
- }
-
- sblock = 1;
- for ( j = 6; j < 206; j += 4 )
- {/* calculate unpredictability measure cw */
- double r2, phi2, temp1, temp2, temp3;
-
- k = (j+2) / 4;
- r_prime = 2.0 * sqrt((double) energy_s[0][k]) - sqrt((double) energy_s[2][k]);
- phi_prime = 2.0 * phi_s[0][k] - phi_s[2][k];
- r2 = sqrt((double) energy_s[1][k]);
- phi2 = phi_s[1][k];
- temp1 = r2 * cos( phi2 ) - r_prime * cos( phi_prime );
- temp2 = r2 * sin( phi2 ) - r_prime * sin( phi_prime );
- temp3 = r2 + fabs( r_prime );
- if ( temp3 != 0.0 )
- cw[j] = sqrt( temp1 * temp1 + temp2 * temp2 ) / temp3;
- else
- cw[j] = 0.0;
- cw[j+1] = cw[j+2] = cw[j+3] = cw[j];
- }
- /**********************************************************************
- * Set unpredicatiblility of remaining spectral lines to 0.4 *
- **********************************************************************/
- for ( j = 206; j < HBLKSIZE; j++ )
- cw[j] = 0.4;
-
- /**********************************************************************
- * Calculate the energy and the unpredictability in the threshold *
- * calculation partitions *
- **********************************************************************/
- for ( b = 0; b < CBANDS; b++ )
- {
- eb[b] = 0.0;
- cb[b] = 0.0;
- }
- for ( j = 0; j < HBLKSIZE; j++ )
- {
- int tp = partition_l[j];
- if ( tp >= 0 )
- {
- eb[tp] += energy[j];
- cb[tp] += cw[j] * energy[j];
- }
- }
- /**********************************************************************
- * convolve the partitioned energy and unpredictability *
- * with the spreading function, s3_l[b][k] *
- ******************************************************************** */
-
- for ( b = 0; b < CBANDS; b++ )
- {
- ecb[b] = 0.0;
- ctb[b] = 0.0;
- }
- for ( b = 0;b < CBANDS; b++ )
- {
- for ( k = 0; k < CBANDS; k++ )
- {
- ecb[b] += s3_l[b][k] * eb[k]; /* sprdngf for Layer III */
- ctb[b] += s3_l[b][k] * cb[k];
- }
- }
- /* calculate the tonality of each threshold calculation partition */
- /* calculate the SNR in each threshhold calculation partition */
- for ( b = 0; b < CBANDS; b++ )
- {
- double cbb,tbb;
- if (ecb[b] != 0.0 )
- {
- cbb = ctb[b]/ecb[b];
- if (cbb <0.01) cbb = 0.01;
- cbb = log( cbb);
- }
- else
- cbb = 0.0 ;
- tbb = -0.299 - 0.43*cbb; /* conv1=-0.299, conv2=-0.43 */
- tbb = minimum( 1.0, maximum( 0.0, tbb) ) ; /* 0<tbb<1 */
- SNR_l[b] = maximum( minval[b], 29.0*tbb+6.0*(1.0-tbb) );
- } /* TMN=29.0,NMT=6.0 for all calculation partitions */
-
- for ( b = 0; b < CBANDS; b++ ) /* calculate the threshold for each partition */
- nb[b] = ecb[b] * norm_l[b] * exp( -SNR_l[b] * LN_TO_LOG10 );
- for ( b = 0; b < CBANDS; b++ )
- { /* pre-echo control */
- double temp_1; /* BUG of IS */
- temp_1 = minimum( nb[b], minimum(2.0*nb_1[chn][b],16.0*nb_2[chn][b]) );
- thr[b] = maximum( qthr_l[b], temp_1 );/* rpelev=2.0, rpelev2=16.0 */
- nb_2[chn][b] = nb_1[chn][b];
- nb_1[chn][b] = nb[b];
- }
- *pe = 0.0; /* calculate percetual entropy */
- for ( b = 0; b < CBANDS; b++ )
- {
- double tp ;
- tp = minimum( 0.0, log((thr[b]+1.0) / (eb[b]+1.0) ) ) ; /*not log*/
- *pe -= numlines[b] * tp ;
- } /* thr[b] -> thr[b]+1.0 : for non sound portition */
-
- #define switch_pe 1800
- blocktype = NORM_TYPE;
-
- if ( *pe < switch_pe )
- { /* no attack : use long blocks */
- switch( blocktype_old[chn] )
- {
- case NORM_TYPE:
- case STOP_TYPE:
- blocktype = NORM_TYPE;
- break;
-
- case SHORT_TYPE:
- blocktype = STOP_TYPE;
- break;
-
- /* case START_TYPE:
- fprintf( stderr, "Error in block selectingn" );
- abort();
- break; problem */
- }
- /* threshold calculation (part 2) */
- for ( sb = 0; sb < SBMAX_l; sb++ )
- {
- en[sb] = w1_l[sb] * eb[bu_l[sb]] + w2_l[sb] * eb[bo_l[sb]];
- thm[sb] = w1_l[sb] *thr[bu_l[sb]] + w2_l[sb] * thr[bo_l[sb]];
- for ( b = bu_l[sb]+1; b < bo_l[sb]; b++ )
- {
- en[sb] += eb[b];
- thm[sb] += thr[b];
- }
- if ( en[sb] != 0.0 )
- ratio[chn][sb] = thm[sb]/en[sb];
- else
- ratio[chn][sb] = 0.0;
- }
- }
- else
- {
- /* attack : use short blocks */
- blocktype = SHORT_TYPE;
-
- if ( blocktype_old[chn] == NORM_TYPE )
- blocktype_old[chn] = START_TYPE;
- if ( blocktype_old[chn] == STOP_TYPE )
- blocktype_old[chn] = SHORT_TYPE ;
-
- /* threshold calculation for short blocks */
-
- for ( sblock = 0; sblock < 3; sblock++ )
- {
- for ( b = 0; b < CBANDS_s; b++ )
- {
- eb[b] = 0.0;
- ecb[b] = 0.0;
- }
- for ( j = 0; j < HBLKSIZE_s; j++ )
- eb[partition_s[j]] += energy_s[sblock][j];
- for ( b = 0; b < CBANDS_s; b++ )
- for ( k = 0; k < CBANDS_s; k++ )
- ecb[b] += s3_l[b][k] * eb[k];
- for ( b = 0; b < CBANDS_s; b++ )
- {
- nb[b] = ecb[b] * norm_l[b] * exp( (double) SNR_s[b] * LN_TO_LOG10 );
- thr[b] = maximum (qthr_s[b],nb[b]);
- }
- for ( sb = 0; sb < SBMAX_s; sb++ )
- {
- en[sb] = w1_s[sb] * eb[bu_s[sb]] + w2_s[sb] * eb[bo_s[sb]];
- thm[sb] = w1_s[sb] *thr[bu_s[sb]] + w2_s[sb] * thr[bo_s[sb]];
- for ( b = bu_s[sb]+1; b < bo_s[sb]; b++ )
- {
- en[sb] += eb[b];
- thm[sb] += thr[b];
- }
- if ( en[sb] != 0.0 )
- ratio_s[chn][sb][sblock] = thm[sb]/en[sb];
- else
- ratio_s[chn][sb][sblock] = 0.0;
- }
- }
- }
-
- cod_info->block_type = blocktype_old[chn];
- blocktype_old[chn] = blocktype;
- if ( cod_info->block_type == NORM_TYPE )
- cod_info->window_switching_flag = 0;
- else
- cod_info->window_switching_flag = 1;
- cod_info->mixed_block_flag = 0;
- }
- /*____ L3para_read() __________________________________________________________*/
- void L3para_read( int sfreq, int *numlines, int *partition_l, double *minval,
- double *qthr_l, double *norm_l, double (*s3_l)[63], int *partition_s,
- double *qthr_s, double *norm_s, double *SNR, int *cbw_l, int *bu_l,
- int *bo_l, double *w1_l, double *w2_l, int *cbw_s, int *bu_s,
- int *bo_s, double *w1_s, double *w2_s )
- {
- static double bval_l[CBANDS], bval_s[CBANDS];
- int cbmax, cbmax_tp;
- static double s3_s[CBANDS][CBANDS];
- int sbmax ;
- int i,j,k,k2, part_max ;
- psyDataElem * rpa1;
- psyDataElem2 * rpa2;
- psyDataElem3 * rpa3;
- /* Read long block data */
- switch( sfreq )
- {
- case 32000:
- rpa1 = psy_longBlock__32000_58;
- cbmax_tp = 59;
- break;
- case 44100:
- rpa1 = psy_longBlock_44100_62;
- cbmax_tp = 63;
- break;
- case 48000:
- rpa1 = psy_longBlock_48000_61;
- cbmax_tp = 62;
- break;
- default:
- return; /* Just to avoid compiler warnings */
- }
-
- cbmax = cbmax_tp;
- for(i=0,k2=0;i<cbmax_tp;i++)
- {
- numlines[i] = rpa1->lines;
- minval[i] = rpa1->minVal;
- qthr_l[i] = rpa1->qthr;
- norm_l[i] = rpa1->norm;
- bval_l[i] = rpa1->bVal;
- rpa1++;
- for(k=0;k<numlines[i];k++)
- partition_l[k2++] = i ;
- }
-
- /************************************************************************
- * Now compute the spreading function, s[j][i], the value of the spread-*
- * ing function, centered at band j, for band i, store for later use *
- ************************************************************************/
- part_max = cbmax ;
- for(i=0;i<part_max;i++)
- {
- double tempx,x,tempy,temp;
- for(j=0;j<part_max;j++)
- {
- /* tempx = (bval_l[i] - bval_l[j])*1.05; */
- if (j>=i)
- tempx = (bval_l[i] - bval_l[j])*3.0;
- else
- tempx = (bval_l[i] - bval_l[j])*1.5;
- /* if (j>=i) tempx = (bval_l[j] - bval_l[i])*3.0;
- else tempx = (bval_l[j] - bval_l[i])*1.5; */
- if(tempx>=0.5 && tempx<=2.5)
- {
- temp = tempx - 0.5;
- x = 8.0 * (temp*temp - 2.0 * temp);
- }
- else x = 0.0;
- tempx += 0.474;
- tempy = 15.811389 + 7.5*tempx - 17.5*sqrt(1.0+tempx*tempx);
- if (tempy <= -60.0) s3_l[i][j] = 0.0;
- else s3_l[i][j] = exp( (x + tempy)*LN_TO_LOG10 );
- }
- }
- /* Read short block data */
- switch( sfreq )
- {
- case 32000:
- rpa2 = psy_shortBlock_32000_41;
- cbmax_tp = 42;
- break;
- case 44100:
- rpa2 = psy_shortBlock_44100_38;
- cbmax_tp = 39;
- break;
- case 48000:
- rpa2 = psy_shortBlock_48000_37;
- cbmax_tp = 38;
- break;
- default:
- return; /* Just to avoid compiler warnings */
- }
- cbmax = cbmax_tp;
- for(i=0,k2=0;i<cbmax_tp;i++)
- {
- numlines[i] = rpa2->lines;
- qthr_s[i] = rpa2->qthr;
- norm_s[i] = rpa2->norm;
- SNR[i] = rpa2->snr;
- bval_s[i] = rpa2->bVal;
- rpa2++;
-
- for(k=0;k<numlines[i];k++)
- partition_s[k2++] = i ;
- }
- /************************************************************************
- * Now compute the spreading function, s[j][i], the value of the spread-*
- * ing function, centered at band j, for band i, store for later use *
- ************************************************************************/
- part_max = cbmax ;
- for(i=0;i<part_max;i++)
- {
- double tempx,x,tempy,temp;
- for(j=0;j<part_max;j++)
- {
- tempx = (bval_s[i] - bval_s[j])*1.05;
- if (j>=i) tempx = (bval_s[i] - bval_s[j])*3.0;
- else tempx = (bval_s[i] - bval_s[j])*1.5;
- if(tempx>=0.5 && tempx<=2.5)
- {
- temp = tempx - 0.5;
- x = 8.0 * (temp*temp - 2.0 * temp);
- }
- else x = 0.0;
- tempx += 0.474;
- tempy = 15.811389 + 7.5*tempx - 17.5*sqrt(1.0+tempx*tempx);
- if (tempy <= -60.0) s3_s[i][j] = 0.0;
- else s3_s[i][j] = exp( (x + tempy)*LN_TO_LOG10 );
- }
- }
- /* Read long block data for converting threshold calculation
- partitions to scale factor bands */
- switch( sfreq )
- {
- case 32000:
- rpa3 = psy_data3_32000_20;
- sbmax = 21;
- break;
- case 44100:
- rpa3 = psy_data3_44100_20;
- sbmax = 21;
- break;
- case 48000:
- rpa3 = psy_data3_48000_20;
- sbmax = 21;
- break;
- default:
- return; /* Just to avoid compiler warnings */
- }
- for(i=0;i<sbmax;i++)
- {
- cbw_l[i] = rpa3->cbw;
- bu_l[i] = rpa3->bu;
- bo_l[i] = rpa3->bo;
- w1_l[i] = rpa3->w1;
- w2_l[i] = rpa3->w2;
- rpa3++;
- }
- /* Read short block data for converting threshold calculation
- partitions to scale factor bands */
- switch( sfreq )
- {
- case 32000:
- rpa3 = psy_data4_32000_11;
- sbmax = 12;
- break;
- case 44100:
- rpa3 = psy_data4_44100_11;
- sbmax = 12;
- break;
- case 48000:
- rpa3 = psy_data4_48000_11;
- sbmax = 12;
- break;
- }
- for(i=0;i<sbmax;i++)
- {
- cbw_s[i] = rpa3->cbw;
- bu_s[i] = rpa3->bu;
- bo_s[i] = rpa3->bo;
- w1_s[i] = rpa3->w1;
- w2_s[i] = rpa3->w2;
- rpa3++;
- }
- }