/*
* 11/19/04 1.0 moved to LGPL.
*
* 04/01/00 Fixes for running under build 23xx Microsoft JVM. mdm.
*
* 19/12/99 Performance improvements to compute_pcm_samples().
* Mat McGowan. mdm@techie.com.
*
* 16/02/99 Java Conversion by E.B , javalayer@javazoom.net
*
* @(#) synthesis_filter.h 1.8, last edit: 6/15/94 16:52:00
* @(#) Copyright (C) 1993, 1994 Tobias Bading (bading@cs.tu-berlin.de)
* @(#) Berlin University of Technology
*
*-----------------------------------------------------------------------
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Library General Public License as published
* by the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*----------------------------------------------------------------------
*/
package audio.javazoom.jl.decoder;
import java.io.IOException;
/**
* A class for the synthesis filter bank.
* This class does a fast downsampling from 32, 44.1 or 48 kHz to 8 kHz, if ULAW is defined.
* Frequencies above 4 kHz are removed by ignoring higher subbands.
*/
final class SynthesisFilter
{
private float[] v1;
private float[] v2;
private float[] actual_v; // v1 or v2
private int actual_write_pos; // 0-15
private float[] samples; // 32 new subband samples
private int channel;
private float scalefactor;
private float[] eq;
/**
* Quality value for controlling CPU usage/quality tradeoff.
*/
/*
private int quality;
private int v_inc;
public static final int HIGH_QUALITY = 1;
public static final int MEDIUM_QUALITY = 2;
public static final int LOW_QUALITY = 4;
*/
/**
* Contructor.
* The scalefactor scales the calculated float pcm samples to short values
* (raw pcm samples are in [-1.0, 1.0], if no violations occur).
*/
public SynthesisFilter(int channelnumber, float factor, float[] eq0)
{
if (d==null)
{
d = load_d();
d16 = splitArray(d, 16);
}
v1 = new float[512];
v2 = new float[512];
samples = new float[32];
channel = channelnumber;
scalefactor = factor;
setEQ(eq);
//setQuality(HIGH_QUALITY);
reset();
}
public void setEQ(float[] eq0)
{
this.eq = eq0;
if (eq==null)
{
eq = new float[32];
for (int i=0; i<32; i++)
eq[i] = 1.0f;
}
if (eq.length<32)
{
throw new IllegalArgumentException("eq0");
}
}
/*
private void setQuality(int quality0)
{
switch (quality0)
{
case HIGH_QUALITY:
case MEDIUM_QUALITY:
case LOW_QUALITY:
v_inc = 16 * quality0;
quality = quality0;
break;
default :
throw new IllegalArgumentException("Unknown quality value");
}
}
public int getQuality()
{
return quality;
}
*/
/**
* Reset the synthesis filter.
*/
public void reset()
{
//float[] floatp;
// float[] floatp2;
// initialize v1[] and v2[]:
//for (floatp = v1 + 512, floatp2 = v2 + 512; floatp > v1; )
// *--floatp = *--floatp2 = 0.0;
for (int p=0;p<512;p++)
v1[p] = v2[p] = 0.0f;
// initialize samples[]:
//for (floatp = samples + 32; floatp > samples; )
// *--floatp = 0.0;
for (int p2=0;p2<32;p2++)
samples[p2] = 0.0f;
actual_v = v1;
actual_write_pos = 15;
}
/**
* Inject Sample.
*/
public void input_sample(float sample, int subbandnumber)
{
samples[subbandnumber] = eq[subbandnumber]*sample;
}
public void input_samples(float[] s)
{
for (int i=31; i>=0; i--)
{
samples[i] = s[i]*eq[i];
}
}
/**
* Compute new values via a fast cosine transform.
*/
private void compute_new_v()
{
// p is fully initialized from x1
//float[] p = _p;
// pp is fully initialized from p
//float[] pp = _pp;
//float[] new_v = _new_v;
//float[] new_v = new float[32]; // new V[0-15] and V[33-48] of Figure 3-A.2 in ISO DIS 11172-3
//float[] p = new float[16];
//float[] pp = new float[16];
/*
for (int i=31; i>=0; i--)
{
new_v[i] = 0.0f;
}
*/
float new_v0, new_v1, new_v2, new_v3, new_v4, new_v5, new_v6, new_v7, new_v8, new_v9;
float new_v10, new_v11, new_v12, new_v13, new_v14, new_v15, new_v16, new_v17, new_v18, new_v19;
float new_v20, new_v21, new_v22, new_v23, new_v24, new_v25, new_v26, new_v27, new_v28, new_v29;
float new_v30, new_v31;
new_v0 = new_v1 = new_v2 = new_v3 = new_v4 = new_v5 = new_v6 = new_v7 = new_v8 = new_v9 =
new_v10 = new_v11 = new_v12 = new_v13 = new_v14 = new_v15 = new_v16 = new_v17 = new_v18 = new_v19 =
new_v20 = new_v21 = new_v22 = new_v23 = new_v24 = new_v25 = new_v26 = new_v27 = new_v28 = new_v29 =
new_v30 = new_v31 = 0.0f;
// float[] new_v = new float[32]; // new V[0-15] and V[33-48] of Figure 3-A.2 in ISO DIS 11172-3
// float[] p = new float[16];
// float[] pp = new float[16];
float[] s = samples;
float s0 = s[0];
float s1 = s[1];
float s2 = s[2];
float s3 = s[3];
float s4 = s[4];
float s5 = s[5];
float s6 = s[6];
float s7 = s[7];
float s8 = s[8];
float s9 = s[9];
float s10 = s[10];
float s11 = s[11];
float s12 = s[12];
float s13 = s[13];
float s14 = s[14];
float s15 = s[15];
float s16 = s[16];
float s17 = s[17];
float s18 = s[18];
float s19 = s[19];
float s20 = s[20];
float s21 = s[21];
float s22 = s[22];
float s23 = s[23];
float s24 = s[24];
float s25 = s[25];
float s26 = s[26];
float s27 = s[27];
float s28 = s[28];
float s29 = s[29];
float s30 = s[30];
float s31 = s[31];
float p0 = s0 + s31;
float p1 = s1 + s30;
float p2 = s2 + s29;
float p3 = s3 + s28;
float p4 = s4 + s27;
float p5 = s5 + s26;
float p6 = s6 + s25;
float p7 = s7 + s24;
float p8 = s8 + s23;
float p9 = s9 + s22;
float p10 = s10 + s21;
float p11 = s11 + s20;
float p12 = s12 + s19;
float p13 = s13 + s18;
float p14 = s14 + s17;
float p15 = s15 + s16;
float pp0 = p0 + p15;
float pp1 = p1 + p14;
float pp2 = p2 + p13;
float pp3 = p3 + p12;
float pp4 = p4 + p11;
float pp5 = p5 + p10;
float pp6 = p6 + p9;
float pp7 = p7 + p8;
float pp8 = (p0 - p15) * cos1_32;
float pp9 = (p1 - p14) * cos3_32;
float pp10 = (p2 - p13) * cos5_32;
float pp11 = (p3 - p12) * cos7_32;
float pp12 = (p4 - p11) * cos9_32;
float pp13 = (p5 - p10) * cos11_32;
float pp14 = (p6 - p9) * cos13_32;
float pp15 = (p7 - p8) * cos15_32;
p0 = pp0 + pp7;
p1 = pp1 + pp6;
p2 = pp2 + pp5;
p3 = pp3 + pp4;
p4 = (pp0 - pp7) * cos1_16;
p5 = (pp1 - pp6) * cos3_16;
p6 = (pp2 - pp5) * cos5_16;
p7 = (pp3 - pp4) * cos7_16;
p8 = pp8 + pp15;
p9 = pp9 + pp14;
p10 = pp10 + pp13;
p11 = pp11 + pp12;
p12 = (pp8 - pp15) * cos1_16;
p13 = (pp9 - pp14) * cos3_16;
p14 = (pp10 - pp13) * cos5_16;
p15 = (pp11 - pp12) * cos7_16;
pp0 = p0 + p3;
pp1 = p1 + p2;
pp2 = (p0 - p3) * cos1_8;
pp3 = (p1 - p2) * cos3_8;
pp4 = p4 + p7;
pp5 = p5 + p6;
pp6 = (p4 - p7) * cos1_8;
pp7 = (p5 - p6) * cos3_8;
pp8 = p8 + p11;
pp9 = p9 + p10;
pp10 = (p8 - p11) * cos1_8;
pp11 = (p9 - p10) * cos3_8;
pp12 = p12 + p15;
pp13 = p13 + p14;
pp14 = (p12 - p15) * cos1_8;
pp15 = (p13 - p14) * cos3_8;
p0 = pp0 + pp1;
p1 = (pp0 - pp1) * cos1_4;
p2 = pp2 + pp3;
p3 = (pp2 - pp3) * cos1_4;
p4 = pp4 + pp5;
p5 = (pp4 - pp5) * cos1_4;
p6 = pp6 + pp7;
p7 = (pp6 - pp7) * cos1_4;
p8 = pp8 + pp9;
p9 = (pp8 - pp9) * cos1_4;
p10 = pp10 + pp11;
p11 = (pp10 - pp11) * cos1_4;
p12 = pp12 + pp13;
p13 = (pp12 - pp13) * cos1_4;
p14 = pp14 + pp15;
p15 = (pp14 - pp15) * cos1_4;
// this is pretty insane coding
float tmp1;
new_v19/*36-17*/ = -(new_v4 = (new_v12 = p7) + p5) - p6;
new_v27/*44-17*/ = -p6 - p7 - p4;
new_v6 = (new_v10 = (new_v14 = p15) + p11) + p13;
new_v17/*34-17*/ = -(new_v2 = p15 + p13 + p9) - p14;
new_v21/*38-17*/ = (tmp1 = -p14 - p15 - p10 - p11) - p13;
new_v29/*46-17*/ = -p14 - p15 - p12 - p8;
new_v25/*42-17*/ = tmp1 - p12;
new_v31/*48-17*/ = -p0;
new_v0 = p1;
new_v23/*40-17*/ = -(new_v8 = p3) - p2;
p0 = (s0 - s31) * cos1_64;
p1 = (s1 - s30) * cos3_64;
p2 = (s2 - s29) * cos5_64;
p3 = (s3 - s28) * cos7_64;
p4 = (s4 - s27) * cos9_64;
p5 = (s5 - s26) * cos11_64;
p6 = (s6 - s25) * cos13_64;
p7 = (s7 - s24) * cos15_64;
p8 = (s8 - s23) * cos17_64;
p9 = (s9 - s22) * cos19_64;
p10 = (s10 - s21) * cos21_64;
p11 = (s11 - s20) * cos23_64;
p12 = (s12 - s19) * cos25_64;
p13 = (s13 - s18) * cos27_64;
p14 = (s14 - s17) * cos29_64;
p15 = (s15 - s16) * cos31_64;
pp0 = p0 + p15;
pp1 = p1 + p14;
pp2 = p2 + p13;
pp3 = p3 + p12;
pp4 = p4 + p11;
pp5 = p5 + p10;
pp6 = p6 + p9;
pp7 = p7 + p8;
pp8 = (p0 - p15) * cos1_32;
pp9 = (p1 - p14) * cos3_32;
pp10 = (p2 - p13) * cos5_32;
pp11 = (p3 - p12) * cos7_32;
pp12 = (p4 - p11) * cos9_32;
pp13 = (p5 - p10) * cos11_32;
pp14 = (p6 - p9) * cos13_32;
pp15 = (p7 - p8) * cos15_32;
p0 = pp0 + pp7;
p1 = pp1 + pp6;
p2 = pp2 + pp5;
p3 = pp3 + pp4;
p4 = (pp0 - pp7) * cos1_16;
p5 = (pp1 - pp6) * cos3_16;
p6 = (pp2 - pp5) * cos5_16;
p7 = (pp3 - pp4) * cos7_16;
p8 = pp8 + pp15;
p9 = pp9 + pp14;
p10 = pp10 + pp13;
p11 = pp11 + pp12;
p12 = (pp8 - pp15) * cos1_16;
p13 = (pp9 - pp14) * cos3_16;
p14 = (pp10 - pp13) * cos5_16;
p15 = (pp11 - pp12) * cos7_16;
pp0 = p0 + p3;
pp1 = p1 + p2;
pp2 = (p0 - p3) * cos1_8;
pp3 = (p1 - p2) * cos3_8;
pp4 = p4 + p7;
pp5 = p5 + p6;
pp6 = (p4 - p7) * cos1_8;
pp7 = (p5 - p6) * cos3_8;
pp8 = p8 + p11;
pp9 = p9 + p10;
pp10 = (p8 - p11) * cos1_8;
pp11 = (p9 - p10) * cos3_8;
pp12 = p12 + p15;
pp13 = p13 + p14;
pp14 = (p12 - p15) * cos1_8;
pp15 = (p13 - p14) * cos3_8;
p0 = pp0 + pp1;
p1 = (pp0 - pp1) * cos1_4;
p2 = pp2 + pp3;
p3 = (pp2 - pp3) * cos1_4;
p4 = pp4 + pp5;
p5 = (pp4 - pp5) * cos1_4;
p6 = pp6 + pp7;
p7 = (pp6 - pp7) * cos1_4;
p8 = pp8 + pp9;
p9 = (pp8 - pp9) * cos1_4;
p10 = pp10 + pp11;
p11 = (pp10 - pp11) * cos1_4;
p12 = pp12 + pp13;
p13 = (pp12 - pp13) * cos1_4;
p14 = pp14 + pp15;
p15 = (pp14 - pp15) * cos1_4;
// manually doing something that a compiler should handle sucks
// coding like this is hard to read
float tmp2;
new_v5 = (new_v11 = (new_v13 = (new_v15 = p15) + p7) + p11)
+ p5 + p13;
new_v7 = (new_v9 = p15 + p11 + p3) + p13;
new_v16/*33-17*/ = -(new_v1 = (tmp1 = p13 + p15 + p9) + p1) - p14;
new_v18/*35-17*/ = -(new_v3 = tmp1 + p5 + p7) - p6 - p14;
new_v22/*39-17*/ = (tmp1 = -p10 - p11 - p14 - p15)
- p13 - p2 - p3;
new_v20/*37-17*/ = tmp1 - p13 - p5 - p6 - p7;
new_v24/*41-17*/ = tmp1 - p12 - p2 - p3;
new_v26/*43-17*/ = tmp1 - p12 - (tmp2 = p4 + p6 + p7);
new_v30/*47-17*/ = (tmp1 = -p8 - p12 - p14 - p15) - p0;
new_v28/*45-17*/ = tmp1 - tmp2;
// insert V[0-15] (== new_v[0-15]) into actual v:
// float[] x2 = actual_v + actual_write_pos;
float dest[] = actual_v;
int pos = actual_write_pos;
dest[0 + pos] = new_v0;
dest[16 + pos] = new_v1;
dest[32 + pos] = new_v2;
dest[48 + pos] = new_v3;
dest[64 + pos] = new_v4;
dest[80 + pos] = new_v5;
dest[96 + pos] = new_v6;
dest[112 + pos] = new_v7;
dest[128 + pos] = new_v8;
dest[144 + pos] = new_v9;
dest[160 + pos] = new_v10;
dest[176 + pos] = new_v11;
dest[192 + pos] = new_v12;
dest[208 + pos] = new_v13;
dest[224 + pos] = new_v14;
dest[240 + pos] = new_v15;
// V[16] is always 0.0:
dest[256 + pos] = 0.0f;
// insert V[17-31] (== -new_v[15-1]) into actual v:
dest[272 + pos] = -new_v15;
dest[288 + pos] = -new_v14;
dest[304 + pos] = -new_v13;
dest[320 + pos] = -new_v12;
dest[336 + pos] = -new_v11;
dest[352 + pos] = -new_v10;
dest[368 + pos] = -new_v9;
dest[384 + pos] = -new_v8;
dest[400 + pos] = -new_v7;
dest[416 + pos] = -new_v6;
dest[432 + pos] = -new_v5;
dest[448 + pos] = -new_v4;
dest[464 + pos] = -new_v3;
dest[480 + pos] = -new_v2;
dest[496 + pos] = -new_v1;
// insert V[32] (== -new_v[0]) into other v:
dest = (actual_v==v1) ? v2 : v1;
dest[0 + pos] = -new_v0;
// insert V[33-48] (== new_v[16-31]) into other v:
dest[16 + pos] = new_v16;
dest[32 + pos] = new_v17;
dest[48 + pos] = new_v18;
dest[64 + pos] = new_v19;
dest[80 + pos] = new_v20;
dest[96 + pos] = new_v21;
dest[112 + pos] = new_v22;
dest[128 + pos] = new_v23;
dest[144 + pos] = new_v24;
dest[160 + pos] = new_v25;
dest[176 + pos] = new_v26;
dest[192 + pos] = new_v27;
dest[208 + pos] = new_v28;
dest[224 + pos] = new_v29;
dest[240 + pos] = new_v30;
dest[256 + pos] = new_v31;
// insert V[49-63] (== new_v[30-16]) into other v:
dest[272 + pos] = new_v30;
dest[288 + pos] = new_v29;
dest[304 + pos] = new_v28;
dest[320 + pos] = new_v27;
dest[336 + pos] = new_v26;
dest[352 + pos] = new_v25;
dest[368 + pos] = new_v24;
dest[384 + pos] = new_v23;
dest[400 + pos] = new_v22;
dest[416 + pos] = new_v21;
dest[432 + pos] = new_v20;
dest[448 + pos] = new_v19;
dest[464 + pos] = new_v18;
dest[480 + pos] = new_v17;
dest[496 + pos] = new_v16;
/*
}
else
{
v1[0 + actual_write_pos] = -new_v0;
// insert V[33-48] (== new_v[16-31]) into other v:
v1[16 + actual_write_pos] = new_v16;
v1[32 + actual_write_pos] = new_v17;
v1[48 + actual_write_pos] = new_v18;
v1[64 + actual_write_pos] = new_v19;
v1[80 + actual_write_pos] = new_v20;
v1[96 + actual_write_pos] = new_v21;
v1[112 + actual_write_pos] = new_v22;
v1[128 + actual_write_pos] = new_v23;
v1[144 + actual_write_pos] = new_v24;
v1[160 + actual_write_pos] = new_v25;
v1[176 + actual_write_pos] = new_v26;
v1[192 + actual_write_pos] = new_v27;
v1[208 + actual_write_pos] = new_v28;
v1[224 + actual_write_pos] = new_v29;
v1[240 + actual_write_pos] = new_v30;
v1[256 + actual_write_pos] = new_v31;
// insert V[49-63] (== new_v[30-16]) into other v:
v1[272 + actual_write_pos] = new_v30;
v1[288 + actual_write_pos] = new_v29;
v1[304 + actual_write_pos] = new_v28;
v1[320 + actual_write_pos] = new_v27;
v1[336 + actual_write_pos] = new_v26;
v1[352 + actual_write_pos] = new_v25;
v1[368 + actual_write_pos] = new_v24;
v1[384 + actual_write_pos] = new_v23;
v1[400 + actual_write_pos] = new_v22;
v1[416 + actual_write_pos] = new_v21;
v1[432 + actual_write_pos] = new_v20;
v1[448 + actual_write_pos] = new_v19;
v1[464 + actual_write_pos] = new_v18;
v1[480 + actual_write_pos] = new_v17;
v1[496 + actual_write_pos] = new_v16;
}
*/
}
/**
* Compute new values via a fast cosine transform.
*/
private void compute_new_v_old()
{
// p is fully initialized from x1
//float[] p = _p;
// pp is fully initialized from p
//float[] pp = _pp;
//float[] new_v = _new_v;
float[] new_v = new float[32]; // new V[0-15] and V[33-48] of Figure 3-A.2 in ISO DIS 11172-3
float[] p = new float[16];
float[] pp = new float[16];
for (int i=31; i>=0; i--)
{
new_v[i] = 0.0f;
}
// float[] new_v = new float[32]; // new V[0-15] and V[33-48] of Figure 3-A.2 in ISO DIS 11172-3
// float[] p = new float[16];
// float[] pp = new float[16];
float[] x1 = samples;
p[0] = x1[0] + x1[31];
p[1] = x1[1] + x1[30];
p[2] = x1[2] + x1[29];
p[3] = x1[3] + x1[28];
p[4] = x1[4] + x1[27];
p[5] = x1[5] + x1[26];
p[6] = x1[6] + x1[25];
p[7] = x1[7] + x1[24];
p[8] = x1[8] + x1[23];
p[9] = x1[9] + x1[22];
p[10] = x1[10] + x1[21];
p[11] = x1[11] + x1[20];
p[12] = x1[12] + x1[19];
p[13] = x1[13] + x1[18];
p[14] = x1[14] + x1[17];
p[15] = x1[15] + x1[16];
pp[0] = p[0] + p[15];
pp[1] = p[1] + p[14];
pp[2] = p[2] + p[13];
pp[3] = p[3] + p[12];
pp[4] = p[4] + p[11];
pp[5] = p[5] + p[10];
pp[6] = p[6] + p[9];
pp[7] = p[7] + p[8];
pp[8] = (p[0] - p[15]) * cos1_32;
pp[9] = (p[1] - p[14]) * cos3_32;
pp[10] = (p[2] - p[13]) * cos5_32;
pp[11] = (p[3] - p[12]) * cos7_32;
pp[12] = (p[4] - p[11]) * cos9_32;
pp[13] = (p[5] - p[10]) * cos11_32;
pp[14] = (p[6] - p[9]) * cos13_32;
pp[15] = (p[7] - p[8]) * cos15_32;
p[0] = pp[0] + pp[7];
p[1] = pp[1] + pp[6];
p[2] = pp[2] + pp[5];
p[3] = pp[3] + pp[4];
p[4] = (pp[0] - pp[7]) * cos1_16;
p[5] = (pp[1] - pp[6]) * cos3_16;
p[6] = (pp[2] - pp[5]) * cos5_16;
p[7] = (pp[3] - pp[4]) * cos7_16;
p[8] = pp[8] + pp[15];
p[9] = pp[9] + pp[14];
p[10] = pp[10] + pp[13];
p[11] = pp[11] + pp[12];
p[12] = (pp[8] - pp[15]) * cos1_16;
p[13] = (pp[9] - pp[14]) * cos3_16;
p[14] = (pp[10] - pp[13]) * cos5_16;
p[15] = (pp[11] - pp[12]) * cos7_16;
pp[0] = p[0] + p[3];
pp[1] = p[1] + p[2];
pp[2] = (p[0] - p[3]) * cos1_8;
pp[3] = (p[1] - p[2]) * cos3_8;
pp[4] = p[4] + p[7];
pp[5] = p[5] + p[6];
pp[6] = (p[4] - p[7]) * cos1_8;
pp[7] = (p[5] - p[6]) * cos3_8;
pp[8] = p[8] + p[11];
pp[9] = p[9] + p[10];
pp[10] = (p[8] - p[11]) * cos1_8;
pp[11] = (p[9] - p[10]) * cos3_8;
pp[12] = p[12] + p[15];
pp[13] = p[13] + p[14];
pp[14] = (p[12] - p[15]) * cos1_8;
pp[15] = (p[13] - p[14]) * cos3_8;
p[0] = pp[0] + pp[1];
p[1] = (pp[0] - pp[1]) * cos1_4;
p[2] = pp[2] + pp[3];
p[3] = (pp[2] - pp[3]) * cos1_4;
p[4] = pp[4] + pp[5];
p[5] = (pp[4] - pp[5]) * cos1_4;
p[6] = pp[6] + pp[7];
p[7] = (pp[6] - pp[7]) * cos1_4;
p[8] = pp[8] + pp[9];
p[9] = (pp[8] - pp[9]) * cos1_4;
p[10] = pp[10] + pp[11];
p[11] = (pp[10] - pp[11]) * cos1_4;
p[12] = pp[12] + pp[13];
p[13] = (pp[12] - pp[13]) * cos1_4;
p[14] = pp[14] + pp[15];
p[15] = (pp[14] - pp[15]) * cos1_4;
// this is pretty insane coding
float tmp1;
new_v[36-17] = -(new_v[4] = (new_v[12] = p[7]) + p[5]) - p[6];
new_v[44-17] = -p[6] - p[7] - p[4];
new_v[6] = (new_v[10] = (new_v[14] = p[15]) + p[11]) + p[13];
new_v[34-17] = -(new_v[2] = p[15] + p[13] + p[9]) - p[14];
new_v[38-17] = (tmp1 = -p[14] - p[15] - p[10] - p[11]) - p[13];
new_v[46-17] = -p[14] - p[15] - p[12] - p[8];
new_v[42-17] = tmp1 - p[12];
new_v[48-17] = -p[0];
new_v[0] = p[1];
new_v[40-17] = -(new_v[8] = p[3]) - p[2];
p[0] = (x1[0] - x1[31]) * cos1_64;
p[1] = (x1[1] - x1[30]) * cos3_64;
p[2] = (x1[2] - x1[29]) * cos5_64;
p[3] = (x1[3] - x1[28]) * cos7_64;
p[4] = (x1[4] - x1[27]) * cos9_64;
p[5] = (x1[5] - x1[26]) * cos11_64;
p[6] = (x1[6] - x1[25]) * cos13_64;
p[7] = (x1[7] - x1[24]) * cos15_64;
p[8] = (x1[8] - x1[23]) * cos17_64;
p[9] = (x1[9] - x1[22]) * cos19_64;
p[10] = (x1[10] - x1[21]) * cos21_64;
p[11] = (x1[11] - x1[20]) * cos23_64;
p[12] = (x1[12] - x1[19]) * cos25_64;
p[13] = (x1[13] - x1[18]) * cos27_64;
p[14] = (x1[14] - x1[17]) * cos29_64;
p[15] = (x1[15] - x1[16]) * cos31_64;
pp[0] = p[0] + p[15];
pp[1] = p[1] + p[14];
pp[2] = p[2] + p[13];
pp[3] = p[3] + p[12];
pp[4] = p[4] + p[11];
pp[5] = p[5] + p[10];
pp[6] = p[6] + p[9];
pp[7] = p[7] + p[8];
pp[8] = (p[0] - p[15]) * cos1_32;
pp[9] = (p[1] - p[14]) * cos3_32;
pp[10] = (p[2] - p[13]) * cos5_32;
pp[11] = (p[3] - p[12]) * cos7_32;
pp[12] = (p[4] - p[11]) * cos9_32;
pp[13] = (p[5] - p[10]) * cos11_32;
pp[14] = (p[6] - p[9]) * cos13_32;
pp[15] = (p[7] - p[8]) * cos15_32;
p[0] = pp[0] + pp[7];
p[1] = pp[1] + pp[6];
p[2] = pp[2] + pp[5];
p[3] = pp[3] + pp[4];
p[4] = (pp[0] - pp[7]) * cos1_16;
p[5] = (pp[1] - pp[6]) * cos3_16;
p[6] = (pp[2] - pp[5]) * cos5_16;
p[7] = (pp[3] - pp[4]) * cos7_16;
p[8] = pp[8] + pp[15];
p[9] = pp[9] + pp[14];
p[10] = pp[10] + pp[13];
p[11] = pp[11] + pp[12];
p[12] = (pp[8] - pp[15]) * cos1_16;
p[13] = (pp[9] - pp[14]) * cos3_16;
p[14] = (pp[10] - pp[13]) * cos5_16;
p[15] = (pp[11] - pp[12]) * cos7_16;
pp[0] = p[0] + p[3];
pp[1] = p[1] + p[2];
pp[2] = (p[0] - p[3]) * cos1_8;
pp[3] = (p[1] - p[2]) * cos3_8;
pp[4] = p[4] + p[7];
pp[5] = p[5] + p[6];
pp[6] = (p[4] - p[7]) * cos1_8;
pp[7] = (p[5] - p[6]) * cos3_8;
pp[8] = p[8] + p[11];
pp[9] = p[9] + p[10];
pp[10] = (p[8] - p[11]) * cos1_8;
pp[11] = (p[9] - p[10]) * cos3_8;
pp[12] = p[12] + p[15];
pp[13] = p[13] + p[14];
pp[14] = (p[12] - p[15]) * cos1_8;
pp[15] = (p[13] - p[14]) * cos3_8;
p[0] = pp[0] + pp[1];
p[1] = (pp[0] - pp[1]) * cos1_4;
p[2] = pp[2] + pp[3];
p[3] = (pp[2] - pp[3]) * cos1_4;
p[4] = pp[4] + pp[5];
p[5] = (pp[4] - pp[5]) * cos1_4;
p[6] = pp[6] + pp[7];
p[7] = (pp[6] - pp[7]) * cos1_4;
p[8] = pp[8] + pp[9];
p[9] = (pp[8] - pp[9]) * cos1_4;
p[10] = pp[10] + pp[11];
p[11] = (pp[10] - pp[11]) * cos1_4;
p[12] = pp[12] + pp[13];
p[13] = (pp[12] - pp[13]) * cos1_4;
p[14] = pp[14] + pp[15];
p[15] = (pp[14] - pp[15]) * cos1_4;
// manually doing something that a compiler should handle sucks
// coding like this is hard to read
float tmp2;
new_v[5] = (new_v[11] = (new_v[13] = (new_v[15] = p[15]) + p[7]) + p[11])
+ p[5] + p[13];
new_v[7] = (new_v[9] = p[15] + p[11] + p[3]) + p[13];
new_v[33-17] = -(new_v[1] = (tmp1 = p[13] + p[15] + p[9]) + p[1]) - p[14];
new_v[35-17] = -(new_v[3] = tmp1 + p[5] + p[7]) - p[6] - p[14];
new_v[39-17] = (tmp1 = -p[10] - p[11] - p[14] - p[15])
- p[13] - p[2] - p[3];
new_v[37-17] = tmp1 - p[13] - p[5] - p[6] - p[7];
new_v[41-17] = tmp1 - p[12] - p[2] - p[3];
new_v[43-17] = tmp1 - p[12] - (tmp2 = p[4] + p[6] + p[7]);
new_v[47-17] = (tmp1 = -p[8] - p[12] - p[14] - p[15]) - p[0];
new_v[45-17] = tmp1 - tmp2;
// insert V[0-15] (== new_v[0-15]) into actual v:
x1 = new_v;
// float[] x2 = actual_v + actual_write_pos;
float[] dest = actual_v;
dest[0 + actual_write_pos] = x1[0];
dest[16 + actual_write_pos] = x1[1];
dest[32 + actual_write_pos] = x1[2];
dest[48 + actual_write_pos] = x1[3];
dest[64 + actual_write_pos] = x1[4];
dest[80 + actual_write_pos] = x1[5];
dest[96 + actual_write_pos] = x1[6];
dest[112 + actual_write_pos] = x1[7];
dest[128 + actual_write_pos] = x1[8];
dest[144 + actual_write_pos] = x1[9];
dest[160 + actual_write_pos] = x1[10];
dest[176 + actual_write_pos] = x1[11];
dest[192 + actual_write_pos] = x1[12];
dest[208 + actual_write_pos] = x1[13];
dest[224 + actual_write_pos] = x1[14];
dest[240 + actual_write_pos] = x1[15];
// V[16] is always 0.0:
dest[256 + actual_write_pos] = 0.0f;
// insert V[17-31] (== -new_v[15-1]) into actual v:
dest[272 + actual_write_pos] = -x1[15];
dest[288 + actual_write_pos] = -x1[14];
dest[304 + actual_write_pos] = -x1[13];
dest[320 + actual_write_pos] = -x1[12];
dest[336 + actual_write_pos] = -x1[11];
dest[352 + actual_write_pos] = -x1[10];
dest[368 + actual_write_pos] = -x1[9];
dest[384 + actual_write_pos] = -x1[8];
dest[400 + actual_write_pos] = -x1[7];
dest[416 + actual_write_pos] = -x1[6];
dest[432 + actual_write_pos] = -x1[5];
dest[448 + actual_write_pos] = -x1[4];
dest[464 + actual_write_pos] = -x1[3];
dest[480 + actual_write_pos] = -x1[2];
dest[496 + actual_write_pos] = -x1[1];
// insert V[32] (== -new_v[0]) into other v:
}
/**
* Compute PCM Samples.
*/
private float[] _tmpOut = new float[32];
private void compute_pcm_samples0(Obuffer buffer)
{
final float[] vp = actual_v;
//int inc = v_inc;
final float[] tmpOut = _tmpOut;
int dvp =0;
// fat chance of having this loop unroll
for( int i=0; i<32; i++)
{
float pcm_sample;
final float[] dp = d16[i];
pcm_sample = (float)(((vp[0 + dvp] * dp[0]) +
(vp[15 + dvp] * dp[1]) +
(vp[14 + dvp] * dp[2]) +
(vp[13 + dvp] * dp[3]) +
(vp[12 + dvp] * dp[4]) +
(vp[11 + dvp] * dp[5]) +
(vp[10 + dvp] * dp[6]) +
(vp[9 + dvp] * dp[7]) +
(vp[8 + dvp] * dp[8]) +
(vp[7 + dvp] * dp[9]) +
(vp[6 + dvp] * dp[10]) +
(vp[5 + dvp] * dp[11]) +
(vp[4 + dvp] * dp[12]) +
(vp[3 + dvp] * dp[13]) +
(vp[2 + dvp] * dp[14]) +
(vp[1 + dvp] * dp[15])
) * scalefactor);
tmpOut[i] = pcm_sample;
dvp += 16;
} // for
}
private void compute_pcm_samples1(Obuffer buffer)
{
final float[] vp = actual_v;
//int inc = v_inc;
final float[] tmpOut = _tmpOut;
int dvp =0;
// fat chance of having this loop unroll
for( int i=0; i<32; i++)
{
final float[] dp = d16[i];
float pcm_sample;
pcm_sample = (float)(((vp[1 + dvp] * dp[0]) +
(vp[0 + dvp] * dp[1]) +
(vp[15 + dvp] * dp[2]) +
(vp[14 + dvp] * dp[3]) +
(vp[13 + dvp] * dp[4]) +
(vp[12 + dvp] * dp[5]) +
(vp[11 + dvp] * dp[6]) +
(vp[10 + dvp] * dp[7]) +
(vp[9 + dvp] * dp[8]) +
(vp[8 + dvp] * dp[9]) +
(vp[7 + dvp] * dp[10]) +
(vp[6 + dvp] * dp[11]) +
(vp[5 + dvp] * dp[12]) +
(vp[4 + dvp] * dp[13]) +
(vp[3 + dvp] * dp[14]) +
(vp[2 + dvp] * dp[15])
) * scalefactor);
tmpOut[i] = pcm_sample;
dvp += 16;
} // for
}
private void compute_pcm_samples2(Obuffer buffer)
{
final float[] vp = actual_v;
//int inc = v_inc;
final float[] tmpOut = _tmpOut;
int dvp =0;
// fat chance of having this loop unroll
for( int i=0; i<32; i++)
{
final float[] dp = d16[i];
float pcm_sample;
pcm_sample = (float)(((vp[2 + dvp] * dp[0]) +
(vp[1 + dvp] * dp[1]) +
(vp[0 + dvp] * dp[2]) +
(vp[15 + dvp] * dp[3]) +
(vp[14 + dvp] * dp[4]) +
(vp[13 + dvp] * dp[5]) +
(vp[12 + dvp] * dp[6]) +
(vp[11 + dvp] * dp[7]) +
(vp[10 + dvp] * dp[8]) +
(vp[9 + dvp] * dp[9]) +
(vp[8 + dvp] * dp[10]) +
(vp[7 + dvp] * dp[11]) +
(vp[6 + dvp] * dp[12]) +
(vp[5 + dvp] * dp[13]) +
(vp[4 + dvp] * dp[14]) +
(vp[3 + dvp] * dp[15])
) * scalefactor);
tmpOut[i] = pcm_sample;
dvp += 16;
} // for
}
private void compute_pcm_samples3(Obuffer buffer)
{
final float[] vp = actual_v;
int idx = 0;
//int inc = v_inc;
final float[] tmpOut = _tmpOut;
int dvp =0;
// fat chance of having this loop unroll
for( int i=0; i<32; i++)
{
final float[] dp = d16[i];
float pcm_sample;
pcm_sample = (float)(((vp[3 + dvp] * dp[0]) +
(vp[2 + dvp] * dp[1]) +
(vp[1 + dvp] * dp[2]) +
(vp[0 + dvp] * dp[3]) +
(vp[15 + dvp] * dp[4]) +
(vp[14 + dvp] * dp[5]) +
(vp[13 + dvp] * dp[6]) +
(vp[12 + dvp] * dp[7]) +
(vp[11 + dvp] * dp[8]) +
(vp[10 + dvp] * dp[9]) +
(vp[9 + dvp] * dp[10]) +
(vp[8 + dvp] * dp[11]) +
(vp[7 + dvp] * dp[12]) +
(vp[6 + dvp] * dp[13]) +
(vp[5 + dvp] * dp[14]) +
(vp[4 + dvp] * dp[15])
) * scalefactor);
tmpOut[i] = pcm_sample;
dvp += 16;
} // for
}
private void compute_pcm_samples4(Obuffer buffer)
{
final float[] vp = actual_v;
//int inc = v_inc;
final float[] tmpOut = _tmpOut;
int dvp =0;
// fat chance of having this loop unroll
for( int i=0; i<32; i++)
{
final float[] dp = d16[i];
float pcm_sample;
pcm_sample = (float)(((vp[4 + dvp] * dp[0]) +
(vp[3 + dvp] * dp[1]) +
(vp[2 + dvp] * dp[2]) +
(vp[1 + dvp] * dp[3]) +
(vp[0 + dvp] * dp[4]) +
(vp[15 + dvp] * dp[5]) +
(vp[14 + dvp] * dp[6]) +
(vp[13 + dvp] * dp[7]) +
(vp[12 + dvp] * dp[8]) +
(vp[11 + dvp] * dp[9]) +
(vp[10 + dvp] * dp[10]) +
(vp[9 + dvp] * dp[11]) +
(vp[8 + dvp] * dp[12]) +
(vp[7 + dvp] * dp[13]) +
(vp[6 + dvp] * dp[14]) +
(vp[5 + dvp] * dp[15])
) * scalefactor);
tmpOut[i] = pcm_sample;
dvp += 16;
} // for
}
private void compute_pcm_samples5(Obuffer buffer)
{
final float[] vp = actual_v;
//int inc = v_inc;
final float[] tmpOut = _tmpOut;
int dvp =0;
// fat chance of having this loop unroll
for( int i=0; i<32; i++)
{
final float[] dp = d16[i];
float pcm_sample;
pcm_sample = (float)(((vp[5 + dvp] * dp[0]) +
(vp[4 + dvp] * dp[1]) +
(vp[3 + dvp] * dp[2]) +
(vp[2 + dvp] * dp[3]) +
(vp[1 + dvp] * dp[4]) +
(vp[0 + dvp] * dp[5]) +
(vp[15 + dvp] * dp[6]) +
(vp[14 + dvp] * dp[7]) +
(vp[13 + dvp] * dp[8]) +
(vp[12 + dvp] * dp[9]) +
(vp[11 + dvp] * dp[10]) +
(vp[10 + dvp] * dp[11]) +
(vp[9 + dvp] * dp[12]) +
(vp[8 + dvp] * dp[13]) +
(vp[7 + dvp] * dp[14]) +
(vp[6 + dvp] * dp[15])
) * scalefactor);
tmpOut[i] = pcm_sample;
dvp += 16;
} // for
}
private void compute_pcm_samples6(Obuffer buffer)
{
final float[] vp = actual_v;
//int inc = v_inc;
final float[] tmpOut = _tmpOut;
int dvp =0;
// fat chance of having this loop unroll
for( int i=0; i<32; i++)
{
final float[] dp = d16[i];
float pcm_sample;
pcm_sample = (float)(((vp[6 + dvp] * dp[0]) +
(vp[5 + dvp] * dp[1]) +
(vp[4 + dvp] * dp[2]) +
(vp[3 + dvp] * dp[3]) +
(vp[2 + dvp] * dp[4]) +
(vp[1 + dvp] * dp[5]) +
(vp[0 + dvp] * dp[6]) +
(vp[15 + dvp] * dp[7]) +
(vp[14 + dvp] * dp[8]) +
(vp[13 + dvp] * dp[9]) +
(vp[12 + dvp] * dp[10]) +
(vp[11 + dvp] * dp[11]) +
(vp[10 + dvp] * dp[12]) +
(vp[9 + dvp] * dp[13]) +
(vp[8 + dvp] * dp[14]) +
(vp[7 + dvp] * dp[15])
) * scalefactor);
tmpOut[i] = pcm_sample;
dvp += 16;
} // for
}
private void compute_pcm_samples7(Obuffer buffer)
{
final float[] vp = actual_v;
//int inc = v_inc;
final float[] tmpOut = _tmpOut;
int dvp =0;
// fat chance of having this loop unroll
for( int i=0; i<32; i++)
{
final float[] dp = d16[i];
float pcm_sample;
pcm_sample = (float)(((vp[7 + dvp] * dp[0]) +
(vp[6 + dvp] * dp[1]) +
(vp[5 + dvp] * dp[2]) +
(vp[4 + dvp] * dp[3]) +
(vp[3 + dvp] * dp[4]) +
(vp[2 + dvp] * dp[5]) +
(vp[1 + dvp] * dp[6]) +
(vp[0 + dvp] * dp[7]) +
(vp[15 + dvp] * dp[8]) +
(vp[14 + dvp] * dp[9]) +
(vp[13 + dvp] * dp[10]) +
(vp[12 + dvp] * dp[11]) +
(vp[11 + dvp] * dp[12]) +
(vp[10 + dvp] * dp[13]) +
(vp[9 + dvp] * dp[14]) +
(vp[8 + dvp] * dp[15])
) * scalefactor);
tmpOut[i] = pcm_sample;
dvp += 16;
} // for
}
private void compute_pcm_samples8(Obuffer buffer)
{
final float[] vp = actual_v;
//int inc = v_inc;
final float[] tmpOut = _tmpOut;
int dvp =0;
// fat chance of having this loop unroll
for( int i=0; i<32; i++)
{
final float[] dp = d16[i];
float pcm_sample;
pcm_sample = (float)(((vp[8 + dvp] * dp[0]) +
(vp[7 + dvp] * dp[1]) +
(vp[6 + dvp] * dp[2]) +
(vp[5 + dvp] * dp[3]) +
(vp[4 + dvp] * dp[4]) +
(vp[3 + dvp] * dp[5]) +
(vp[2 + dvp] * dp[6]) +
(vp[1 + dvp] * dp[7]) +
(vp[0 + dvp] * dp[8]) +
(vp[15 + dvp] * dp[9]) +
(vp[14 + dvp] * dp[10]) +
(vp[13 + dvp] * dp[11]) +
(vp[12 + dvp] * dp[12]) +
(vp[11 + dvp] * dp[13]) +
(vp[10 + dvp] * dp[14]) +
(vp[9 + dvp] * dp[15])
) * scalefactor);
tmpOut[i] = pcm_sample;
dvp += 16;
} // for
}
private void compute_pcm_samples9(Obuffer buffer)
{
final float[] vp = actual_v;
//int inc = v_inc;
final float[] tmpOut = _tmpOut;
int dvp =0;
// fat chance of having this loop unroll
for( int i=0; i<32; i++)
{
final float[] dp = d16[i];
float pcm_sample;
pcm_sample = (float)(((vp[9 + dvp] * dp[0]) +
(vp[8 + dvp] * dp[1]) +
(vp[7 + dvp] * dp[2]) +
(vp[6 + dvp] * dp[3]) +
(vp[5 + dvp] * dp[4]) +
(vp[4 + dvp] * dp[5]) +
(vp[3 + dvp] * dp[6]) +
(vp[2 + dvp] * dp[7]) +
(vp[1 + dvp] * dp[8]) +
(vp[0 + dvp] * dp[9]) +
(vp[15 + dvp] * dp[10]) +
(vp[14 + dvp] * dp[11]) +
(vp[13 + dvp] * dp[12]) +
(vp[12 + dvp] * dp[13]) +
(vp[11 + dvp] * dp[14]) +
(vp[10 + dvp] * dp[15])
) * scalefactor);
tmpOut[i] = pcm_sample;
dvp += 16;
} // for
}
private void compute_pcm_samples10(Obuffer buffer)
{
final float[] vp = actual_v;
//int inc = v_inc;
final float[] tmpOut = _tmpOut;
int dvp =0;
// fat chance of having this loop unroll
for( int i=0; i<32; i++)
{
final float[] dp = d16[i];
float pcm_sample;
pcm_sample = (float)(((vp[10 + dvp] * dp[0]) +
(vp[9 + dvp] * dp[1]) +
(vp[8 + dvp] * dp[2]) +
(vp[7 + dvp] * dp[3]) +
(vp[6 + dvp] * dp[4]) +
(vp[5 + dvp] * dp[5]) +
(vp[4 + dvp] * dp[6]) +
(vp[3 + dvp] * dp[7]) +
(vp[2 + dvp] * dp[8]) +
(vp[1 + dvp] * dp[9]) +
(vp[0 + dvp] * dp[10]) +
(vp[15 + dvp] * dp[11]) +
(vp[14 + dvp] * dp[12]) +
(vp[13 + dvp] * dp[13]) +
(vp[12 + dvp] * dp[14]) +
(vp[11 + dvp] * dp[15])
) * scalefactor);
tmpOut[i] = pcm_sample;
dvp += 16;
} // for
}
private void compute_pcm_samples11(Obuffer buffer)
{
final float[] vp = actual_v;
//int inc = v_inc;
final float[] tmpOut = _tmpOut;
int dvp =0;
// fat chance of having this loop unroll
for( int i=0; i<32; i++)
{
final float[] dp = d16[i];
float pcm_sample;
pcm_sample = (float)(((vp[11 + dvp] * dp[0]) +
(vp[10 + dvp] * dp[1]) +
(vp[9 + dvp] * dp[2]) +
(vp[8 + dvp] * dp[3]) +
(vp[7 + dvp] * dp[4]) +
(vp[6 + dvp] * dp[5]) +
(vp[5 + dvp] * dp[6]) +
(vp[4 + dvp] * dp[7]) +
(vp[3 + dvp] * dp[8]) +
(vp[2 + dvp] * dp[9]) +
(vp[1 + dvp] * dp[10]) +
(vp[0 + dvp] * dp[11]) +
(vp[15 + dvp] * dp[12]) +
(vp[14 + dvp] * dp[13]) +
(vp[13 + dvp] * dp[14]) +
(vp[12 + dvp] * dp[15])
) * scalefactor);
tmpOut[i] = pcm_sample;
dvp += 16;
} // for
}
private void compute_pcm_samples12(Obuffer buffer)
{
final float[] vp = actual_v;
//int inc = v_inc;
final float[] tmpOut = _tmpOut;
int dvp =0;
// fat chance of having this loop unroll
for( int i=0; i<32; i++)
{
final float[] dp = d16[i];
float pcm_sample;
pcm_sample = (float)(((vp[12 + dvp] * dp[0]) +
(vp[11 + dvp] * dp[1]) +
(vp[10 + dvp] * dp[2]) +
(vp[9 + dvp] * dp[3]) +
(vp[8 + dvp] * dp[4]) +
(vp[7 + dvp] * dp[5]) +
(vp[6 + dvp] * dp[6]) +
(vp[5 + dvp] * dp[7]) +
(vp[4 + dvp] * dp[8]) +
(vp[3 + dvp] * dp[9]) +
(vp[2 + dvp] * dp[10]) +
(vp[1 + dvp] * dp[11]) +
(vp[0 + dvp] * dp[12]) +
(vp[15 + dvp] * dp[13]) +
(vp[14 + dvp] * dp[14]) +
(vp[13 + dvp] * dp[15])
) * scalefactor);
tmpOut[i] = pcm_sample;
dvp += 16;
} // for
}
private void compute_pcm_samples13(Obuffer buffer)
{
final float[] vp = actual_v;
//int inc = v_inc;
final float[] tmpOut = _tmpOut;
int dvp =0;
// fat chance of having this loop unroll
for( int i=0; i<32; i++)
{
final float[] dp = d16[i];
float pcm_sample;
pcm_sample = (float)(((vp[13 + dvp] * dp[0]) +
(vp[12 + dvp] * dp[1]) +
(vp[11 + dvp] * dp[2]) +
(vp[10 + dvp] * dp[3]) +
(vp[9 + dvp] * dp[4]) +
(vp[8 + dvp] * dp[5]) +
(vp[7 + dvp] * dp[6]) +
(vp[6 + dvp] * dp[7]) +
(vp[5 + dvp] * dp[8]) +
(vp[4 + dvp] * dp[9]) +
(vp[3 + dvp] * dp[10]) +
(vp[2 + dvp] * dp[11]) +
(vp[1 + dvp] * dp[12]) +
(vp[0 + dvp] * dp[13]) +
(vp[15 + dvp] * dp[14]) +
(vp[14 + dvp] * dp[15])
) * scalefactor);
tmpOut[i] = pcm_sample;
dvp += 16;
} // for
}
private void compute_pcm_samples14(Obuffer buffer)
{
final float[] vp = actual_v;
//int inc = v_inc;
final float[] tmpOut = _tmpOut;
int dvp =0;
// fat chance of having this loop unroll
for( int i=0; i<32; i++)
{
final float[] dp = d16[i];
float pcm_sample;
pcm_sample = (float)(((vp[14 + dvp] * dp[0]) +
(vp[13 + dvp] * dp[1]) +
(vp[12 + dvp] * dp[2]) +
(vp[11 + dvp] * dp[3]) +
(vp[10 + dvp] * dp[4]) +
(vp[9 + dvp] * dp[5]) +
(vp[8 + dvp] * dp[6]) +
(vp[7 + dvp] * dp[7]) +
(vp[6 + dvp] * dp[8]) +
(vp[5 + dvp] * dp[9]) +
(vp[4 + dvp] * dp[10]) +
(vp[3 + dvp] * dp[11]) +
(vp[2 + dvp] * dp[12]) +
(vp[1 + dvp] * dp[13]) +
(vp[0 + dvp] * dp[14]) +
(vp[15 + dvp] * dp[15])
) * scalefactor);
tmpOut[i] = pcm_sample;
dvp += 16;
} // for
}
private void compute_pcm_samples15(Obuffer buffer)
{
final float[] vp = actual_v;
//int inc = v_inc;
final float[] tmpOut = _tmpOut;
int dvp =0;
// fat chance of having this loop unroll
for( int i=0; i<32; i++)
{
float pcm_sample;
final float dp[] = d16[i];
pcm_sample = (float)(((vp[15 + dvp] * dp[0]) +
(vp[14 + dvp] * dp[1]) +
(vp[13 + dvp] * dp[2]) +
(vp[12 + dvp] * dp[3]) +
(vp[11 + dvp] * dp[4]) +
(vp[10 + dvp] * dp[5]) +
(vp[9 + dvp] * dp[6]) +
(vp[8 + dvp] * dp[7]) +
(vp[7 + dvp] * dp[8]) +
(vp[6 + dvp] * dp[9]) +
(vp[5 + dvp] * dp[10]) +
(vp[4 + dvp] * dp[11]) +
(vp[3 + dvp] * dp[12]) +
(vp[2 + dvp] * dp[13]) +
(vp[1 + dvp] * dp[14]) +
(vp[0 + dvp] * dp[15])
) * scalefactor);
tmpOut[i] = pcm_sample;
dvp += 16;
} // for
}
private void compute_pcm_samples(Obuffer buffer)
{
switch (actual_write_pos)
{
case 0:
compute_pcm_samples0(buffer);
break;
case 1:
compute_pcm_samples1(buffer);
break;
case 2:
compute_pcm_samples2(buffer);
break;
case 3:
compute_pcm_samples3(buffer);
break;
case 4:
compute_pcm_samples4(buffer);
break;
case 5:
compute_pcm_samples5(buffer);
break;
case 6:
compute_pcm_samples6(buffer);
break;
case 7:
compute_pcm_samples7(buffer);
break;
case 8:
compute_pcm_samples8(buffer);
break;
case 9:
compute_pcm_samples9(buffer);
break;
case 10:
compute_pcm_samples10(buffer);
break;
case 11:
compute_pcm_samples11(buffer);
break;
case 12:
compute_pcm_samples12(buffer);
break;
case 13:
compute_pcm_samples13(buffer);
break;
case 14:
compute_pcm_samples14(buffer);
break;
case 15:
compute_pcm_samples15(buffer);
break;
}
if (buffer!=null)
{
buffer.appendSamples(channel, _tmpOut);
}
/*
// MDM: I was considering putting in quality control for
// low-spec CPUs, but the performance gain (about 10-15%)
// did not justify the considerable drop in audio quality.
switch (inc)
{
case 16:
buffer.appendSamples(channel, tmpOut);
break;
case 32:
for (int i=0; i<16; i++)
{
buffer.append(channel, (short)tmpOut[i]);
buffer.append(channel, (short)tmpOut[i]);
}
break;
case 64:
for (int i=0; i<8; i++)
{
buffer.append(channel, (short)tmpOut[i]);
buffer.append(channel, (short)tmpOut[i]);
buffer.append(channel, (short)tmpOut[i]);
buffer.append(channel, (short)tmpOut[i]);
}
break;
}
*/
}
/**
* Calculate 32 PCM samples and put the into the Obuffer-object.
*/
public void calculate_pcm_samples(Obuffer buffer)
{
compute_new_v();
compute_pcm_samples(buffer);
actual_write_pos = (actual_write_pos + 1) & 0xf;
actual_v = (actual_v == v1) ? v2 : v1;
// initialize samples[]:
//for (register float *floatp = samples + 32; floatp > samples; )
// *--floatp = 0.0f;
// MDM: this may not be necessary. The Layer III decoder always
// outputs 32 subband samples, but I haven't checked layer I & II.
for (int p=0;p<32;p++)
samples[p] = 0.0f;
}
private static final double MY_PI = 3.14159265358979323846;
private static final float cos1_64 =(float) (1.0 / (2.0 * Math.cos(MY_PI / 64.0)));
private static final float cos3_64 =(float) (1.0 / (2.0 * Math.cos(MY_PI * 3.0 / 64.0)));
private static final float cos5_64 =(float) (1.0 / (2.0 * Math.cos(MY_PI * 5.0 / 64.0)));
private static final float cos7_64 =(float) (1.0 / (2.0 * Math.cos(MY_PI * 7.0 / 64.0)));
private static final float cos9_64 =(float) (1.0 / (2.0 * Math.cos(MY_PI * 9.0 / 64.0)));
private static final float cos11_64 =(float) (1.0 / (2.0 * Math.cos(MY_PI * 11.0 / 64.0)));
private static final float cos13_64 =(float) (1.0 / (2.0 * Math.cos(MY_PI * 13.0 / 64.0)));
private static final float cos15_64 =(float) (1.0 / (2.0 * Math.cos(MY_PI * 15.0 / 64.0)));
private static final float cos17_64 =(float) (1.0 / (2.0 * Math.cos(MY_PI * 17.0 / 64.0)));
private static final float cos19_64 =(float) (1.0 / (2.0 * Math.cos(MY_PI * 19.0 / 64.0)));
private static final float cos21_64 =(float) (1.0 / (2.0 * Math.cos(MY_PI * 21.0 / 64.0)));
private static final float cos23_64 =(float) (1.0 / (2.0 * Math.cos(MY_PI * 23.0 / 64.0)));
private static final float cos25_64 =(float) (1.0 / (2.0 * Math.cos(MY_PI * 25.0 / 64.0)));
private static final float cos27_64 =(float) (1.0 / (2.0 * Math.cos(MY_PI * 27.0 / 64.0)));
private static final float cos29_64 =(float) (1.0 / (2.0 * Math.cos(MY_PI * 29.0 / 64.0)));
private static final float cos31_64 =(float) (1.0 / (2.0 * Math.cos(MY_PI * 31.0 / 64.0)));
private static final float cos1_32 =(float) (1.0 / (2.0 * Math.cos(MY_PI / 32.0)));
private static final float cos3_32 =(float) (1.0 / (2.0 * Math.cos(MY_PI * 3.0 / 32.0)));
private static final float cos5_32 =(float) (1.0 / (2.0 * Math.cos(MY_PI * 5.0 / 32.0)));
private static final float cos7_32 =(float) (1.0 / (2.0 * Math.cos(MY_PI * 7.0 / 32.0)));
private static final float cos9_32 =(float) (1.0 / (2.0 * Math.cos(MY_PI * 9.0 / 32.0)));
private static final float cos11_32 =(float) (1.0 / (2.0 * Math.cos(MY_PI * 11.0 / 32.0)));
private static final float cos13_32 =(float) (1.0 / (2.0 * Math.cos(MY_PI * 13.0 / 32.0)));
private static final float cos15_32 =(float) (1.0 / (2.0 * Math.cos(MY_PI * 15.0 / 32.0)));
private static final float cos1_16 =(float) (1.0 / (2.0 * Math.cos(MY_PI / 16.0)));
private static final float cos3_16 =(float) (1.0 / (2.0 * Math.cos(MY_PI * 3.0 / 16.0)));
private static final float cos5_16 =(float) (1.0 / (2.0 * Math.cos(MY_PI * 5.0 / 16.0)));
private static final float cos7_16 =(float) (1.0 / (2.0 * Math.cos(MY_PI * 7.0 / 16.0)));
private static final float cos1_8 =(float) (1.0 / (2.0 * Math.cos(MY_PI / 8.0)));
private static final float cos3_8 =(float) (1.0 / (2.0 * Math.cos(MY_PI * 3.0 / 8.0)));
private static final float cos1_4 =(float) (1.0 / (2.0 * Math.cos(MY_PI / 4.0)));
// Note: These values are not in the same order
// as in Annex 3-B.3 of the ISO/IEC DIS 11172-3
// private float d[] = {0.000000000, -4.000442505};
private static float d[] = null;
/**
* d[] split into subarrays of length 16. This provides for
* more faster access by allowing a block of 16 to be addressed
* with constant offset.
**/
private static float d16[][] = null;
/**
* Loads the data for the d[] from the resource SFd.ser.
* @return the loaded values for d[].
*/
static private float[] load_d()
{
try
{
Class elemType = Float.TYPE;
Object o = JavaLayerUtils.deserializeArrayResource("sfd.ser", elemType, 512);
return (float[])o;
}
catch (IOException ex)
{
throw new ExceptionInInitializerError(ex);
}
}
/**
* Converts a 1D array into a number of smaller arrays. This is used
* to achieve offset + constant indexing into an array. Each sub-array
* represents a block of values of the original array.
* @param array The array to split up into blocks.
* @param blockSize The size of the blocks to split the array
* into. This must be an exact divisor of
* the length of the array, or some data
* will be lost from the main array.
*
* @return An array of arrays in which each element in the returned
* array will be of length <code>blockSize</code>.
*/
static private float[][] splitArray(final float[] array, final int blockSize)
{
int size = array.length / blockSize;
float[][] split = new float[size][];
for (int i=0; i<size; i++)
{
split[i] = subArray(array, i*blockSize, blockSize);
}
return split;
}
/**
* Returns a subarray of an existing array.
*
* @param array The array to retrieve a subarra from.
* @param offs The offset in the array that corresponds to
* the first index of the subarray.
* @param len The number of indeces in the subarray.
* @return The subarray, which may be of length 0.
*/
static private float[] subArray(final float[] array, final int offs, int len)
{
if (offs+len > array.length)
{
len = array.length-offs;
}
if (len < 0)
len = 0;
float[] subarray = new float[len];
for (int i=0; i<len; i++)
{
subarray[i] = array[offs+i];
}
return subarray;
}
// The original data for d[]. This data is loaded from a file
// to reduce the overall package size and to improve performance.
/*
static final float d_data[] = {
0.000000000f, -0.000442505f, 0.003250122f, -0.007003784f,
0.031082153f, -0.078628540f, 0.100311279f, -0.572036743f,
1.144989014f, 0.572036743f, 0.100311279f, 0.078628540f,
0.031082153f, 0.007003784f, 0.003250122f, 0.000442505f,
-0.000015259f, -0.000473022f, 0.003326416f, -0.007919312f,
0.030517578f, -0.084182739f, 0.090927124f, -0.600219727f,
1.144287109f, 0.543823242f, 0.108856201f, 0.073059082f,
0.031478882f, 0.006118774f, 0.003173828f, 0.000396729f,
-0.000015259f, -0.000534058f, 0.003387451f, -0.008865356f,
0.029785156f, -0.089706421f, 0.080688477f, -0.628295898f,
1.142211914f, 0.515609741f, 0.116577148f, 0.067520142f,
0.031738281f, 0.005294800f, 0.003082275f, 0.000366211f,
-0.000015259f, -0.000579834f, 0.003433228f, -0.009841919f,
0.028884888f, -0.095169067f, 0.069595337f, -0.656219482f,
1.138763428f, 0.487472534f, 0.123474121f, 0.061996460f,
0.031845093f, 0.004486084f, 0.002990723f, 0.000320435f,
-0.000015259f, -0.000625610f, 0.003463745f, -0.010848999f,
0.027801514f, -0.100540161f, 0.057617188f, -0.683914185f,
1.133926392f, 0.459472656f, 0.129577637f, 0.056533813f,
0.031814575f, 0.003723145f, 0.002899170f, 0.000289917f,
-0.000015259f, -0.000686646f, 0.003479004f, -0.011886597f,
0.026535034f, -0.105819702f, 0.044784546f, -0.711318970f,
1.127746582f, 0.431655884f, 0.134887695f, 0.051132202f,
0.031661987f, 0.003005981f, 0.002792358f, 0.000259399f,
-0.000015259f, -0.000747681f, 0.003479004f, -0.012939453f,
0.025085449f, -0.110946655f, 0.031082153f, -0.738372803f,
1.120223999f, 0.404083252f, 0.139450073f, 0.045837402f,
0.031387329f, 0.002334595f, 0.002685547f, 0.000244141f,
-0.000030518f, -0.000808716f, 0.003463745f, -0.014022827f,
0.023422241f, -0.115921021f, 0.016510010f, -0.765029907f,
1.111373901f, 0.376800537f, 0.143264771f, 0.040634155f,
0.031005859f, 0.001693726f, 0.002578735f, 0.000213623f,
-0.000030518f, -0.000885010f, 0.003417969f, -0.015121460f,
0.021575928f, -0.120697021f, 0.001068115f, -0.791213989f,
1.101211548f, 0.349868774f, 0.146362305f, 0.035552979f,
0.030532837f, 0.001098633f, 0.002456665f, 0.000198364f,
-0.000030518f, -0.000961304f, 0.003372192f, -0.016235352f,
0.019531250f, -0.125259399f, -0.015228271f, -0.816864014f,
1.089782715f, 0.323318481f, 0.148773193f, 0.030609131f,
0.029937744f, 0.000549316f, 0.002349854f, 0.000167847f,
-0.000030518f, -0.001037598f, 0.003280640f, -0.017349243f,
0.017257690f, -0.129562378f, -0.032379150f, -0.841949463f,
1.077117920f, 0.297210693f, 0.150497437f, 0.025817871f,
0.029281616f, 0.000030518f, 0.002243042f, 0.000152588f,
-0.000045776f, -0.001113892f, 0.003173828f, -0.018463135f,
0.014801025f, -0.133590698f, -0.050354004f, -0.866363525f,
1.063217163f, 0.271591187f, 0.151596069f, 0.021179199f,
0.028533936f, -0.000442505f, 0.002120972f, 0.000137329f,
-0.000045776f, -0.001205444f, 0.003051758f, -0.019577026f,
0.012115479f, -0.137298584f, -0.069168091f, -0.890090942f,
1.048156738f, 0.246505737f, 0.152069092f, 0.016708374f,
0.027725220f, -0.000869751f, 0.002014160f, 0.000122070f,
-0.000061035f, -0.001296997f, 0.002883911f, -0.020690918f,
0.009231567f, -0.140670776f, -0.088775635f, -0.913055420f,
1.031936646f, 0.221984863f, 0.151962280f, 0.012420654f,
0.026840210f, -0.001266479f, 0.001907349f, 0.000106812f,
-0.000061035f, -0.001388550f, 0.002700806f, -0.021789551f,
0.006134033f, -0.143676758f, -0.109161377f, -0.935195923f,
1.014617920f, 0.198059082f, 0.151306152f, 0.008316040f,
0.025909424f, -0.001617432f, 0.001785278f, 0.000106812f,
-0.000076294f, -0.001480103f, 0.002487183f, -0.022857666f,
0.002822876f, -0.146255493f, -0.130310059f, -0.956481934f,
0.996246338f, 0.174789429f, 0.150115967f, 0.004394531f,
0.024932861f, -0.001937866f, 0.001693726f, 0.000091553f,
-0.000076294f, -0.001586914f, 0.002227783f, -0.023910522f,
-0.000686646f, -0.148422241f, -0.152206421f, -0.976852417f,
0.976852417f, 0.152206421f, 0.148422241f, 0.000686646f,
0.023910522f, -0.002227783f, 0.001586914f, 0.000076294f,
-0.000091553f, -0.001693726f, 0.001937866f, -0.024932861f,
-0.004394531f, -0.150115967f, -0.174789429f, -0.996246338f,
0.956481934f, 0.130310059f, 0.146255493f, -0.002822876f,
0.022857666f, -0.002487183f, 0.001480103f, 0.000076294f,
-0.000106812f, -0.001785278f, 0.001617432f, -0.025909424f,
-0.008316040f, -0.151306152f, -0.198059082f, -1.014617920f,
0.935195923f, 0.109161377f, 0.143676758f, -0.006134033f,
0.021789551f, -0.002700806f, 0.001388550f, 0.000061035f,
-0.000106812f, -0.001907349f, 0.001266479f, -0.026840210f,
-0.012420654f, -0.151962280f, -0.221984863f, -1.031936646f,
0.913055420f, 0.088775635f, 0.140670776f, -0.009231567f,
0.020690918f, -0.002883911f, 0.001296997f, 0.000061035f,
-0.000122070f, -0.002014160f, 0.000869751f, -0.027725220f,
-0.016708374f, -0.152069092f, -0.246505737f, -1.048156738f,
0.890090942f, 0.069168091f, 0.137298584f, -0.012115479f,
0.019577026f, -0.003051758f, 0.001205444f, 0.000045776f,
-0.000137329f, -0.002120972f, 0.000442505f, -0.028533936f,
-0.021179199f, -0.151596069f, -0.271591187f, -1.063217163f,
0.866363525f, 0.050354004f, 0.133590698f, -0.014801025f,
0.018463135f, -0.003173828f, 0.001113892f, 0.000045776f,
-0.000152588f, -0.002243042f, -0.000030518f, -0.029281616f,
-0.025817871f, -0.150497437f, -0.297210693f, -1.077117920f,
0.841949463f, 0.032379150f, 0.129562378f, -0.017257690f,
0.017349243f, -0.003280640f, 0.001037598f, 0.000030518f,
-0.000167847f, -0.002349854f, -0.000549316f, -0.029937744f,
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