1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
|
/*
* Copyright 2013 Phil Burk, Mobileer Inc
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
*
*/
package com.jsyn.benchmarks;
import com.jsyn.JSyn;
import com.jsyn.Synthesizer;
import com.jsyn.unitgen.PassThrough;
import com.jsyn.unitgen.SawtoothOscillator;
import com.jsyn.unitgen.SawtoothOscillatorBL;
import com.jsyn.unitgen.SawtoothOscillatorDPW;
import com.jsyn.unitgen.UnitOscillator;
import com.softsynth.math.FourierMath;
/**
* @author Phil Burk (C) 2013 Mobileer Inc
*/
public class BenchJSyn {
private Synthesizer synth;
private long startTime;
private long endTime;
private PassThrough pass;
public void run() {
try {
// Run multiple times to see if HotSpot compiler or cache makes a difference.
for (int i = 0; i < 4; i++) {
benchmark();
}
} catch (InstantiationException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
private void benchmark() throws InstantiationException, IllegalAccessException,
InterruptedException {
double realTime = 10.0;
int count = 40;
benchFFTDouble();
benchFFTFloat();
benchmarkOscillator(SawtoothOscillator.class, count, realTime);
benchmarkOscillator(SawtoothOscillatorDPW.class, count, realTime);
benchmarkOscillator(SawtoothOscillatorBL.class, count, realTime);
}
public void benchFFTDouble() {
int size = 2048;
int bin = 5;
int count = 20000;
double[] ar = new double[size];
double[] ai = new double[size];
double[] magnitudes = new double[size];
double amplitude = 1.0;
addSineWave(size, bin, ar, amplitude);
System.out.println("Bench double FFT");
startTiming();
for (int i = 0; i < count; i++) {
FourierMath.transform(1, size, ar, ai);
}
endTiming(FourierMath.class, count, size / (2.0 * 44100));
FourierMath.calculateMagnitudes(ar, ai, magnitudes);
assert (magnitudes[bin - 1] < 0.001);
assert (magnitudes[bin] > 0.5);
assert (magnitudes[bin + 1] < 0.001);
}
public void benchFFTFloat() {
int size = 2048;
int bin = 5;
int count = 20000;
float[] ar = new float[size];
float[] ai = new float[size];
float[] magnitudes = new float[size];
float amplitude = 1.0f;
addSineWave(size, bin, ar, amplitude);
System.out.println("Bench float FFT");
startTiming();
for (int i = 0; i < count; i++) {
FourierMath.transform(1, size, ar, ai);
}
endTiming(FourierMath.class, count, size / (2.0 * 44100));
FourierMath.calculateMagnitudes(ar, ai, magnitudes);
assert (magnitudes[bin - 1] < 0.001);
assert (magnitudes[bin] > 0.5);
assert (magnitudes[bin + 1] < 0.001);
}
private void addSineWave(int size, int bin, double[] ar, double amplitude) {
double phase = 0.0;
double phaseIncrement = 2.0 * Math.PI * bin / size;
for (int i = 0; i < size; i++) {
ar[i] += Math.sin(phase) * amplitude;
// System.out.println( i + " = " + ar[i] );
phase += phaseIncrement;
}
}
private void addSineWave(int size, int bin, float[] ar, float amplitude) {
float phase = 0.0f;
float phaseIncrement = (float) (2.0 * Math.PI * bin / size);
for (int i = 0; i < size; i++) {
ar[i] += (float) Math.sin(phase) * amplitude;
// System.out.println( i + " = " + ar[i] );
phase += phaseIncrement;
}
}
private void stopSynth() {
synth.stop();
}
private void startSynth() {
synth = JSyn.createSynthesizer(); // Mac
// synth = JSyn.createSynthesizer( new JSynAndroidAudioDevice() ); // Android
synth.setRealTime(false);
pass = new PassThrough();
synth.add(pass);
synth.start();
pass.start();
}
private void benchmarkOscillator(Class<?> clazz, int count, double realTime)
throws InstantiationException, IllegalAccessException, InterruptedException {
startSynth();
for (int i = 0; i < count; i++) {
UnitOscillator osc = (UnitOscillator) clazz.newInstance();
osc.output.connect(pass.input);
synth.add(osc);
}
startTiming();
synth.sleepFor(realTime);
endTiming(clazz, count, realTime);
stopSynth();
}
private void endTiming(Class<?> clazz, int count, double realTime) {
endTime = System.nanoTime();
double elapsedTime = (endTime - startTime) * 1E-9;
double percent = 100.0 * elapsedTime / (realTime * count);
System.out.printf("%32s took %5.3f/%d seconds to process %5.4f of audio = %6.3f%c.\n",
clazz.getSimpleName(), elapsedTime, count, realTime, percent, '%');
}
private void startTiming() {
startTime = System.nanoTime();
}
/**
* @param args
*/
public static void main(String[] args) {
new BenchJSyn().run();
}
}
|
