Java Code Examples for javax.sound.sampled.AudioInputStream#read()
The following examples show how to use
javax.sound.sampled.AudioInputStream#read() .
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Example 1
| Source File: SkipTest.java From hottub with GNU General Public License v2.0 | 6 votes |
|
public static void main(String[] args) throws Exception {
AudioFloatFormatConverter converter = new AudioFloatFormatConverter();
byte[] data = { 10, 20, 30, 40, 30, 20, 10 };
AudioFormat format = new AudioFormat(8000, 8, 1, true, false);
AudioFormat format2 = new AudioFormat(16000, 8, 1, true, false);
AudioInputStream ais = new AudioInputStream(new ByteArrayInputStream(
data), format, data.length);
AudioInputStream ais2 = converter.getAudioInputStream(format2, ais);
byte[] data2 = new byte[30];
int ret = ais2.read(data2, 0, data2.length);
ais.reset();
AudioInputStream ais3 = converter.getAudioInputStream(format2, ais);
byte[] data3 = new byte[100];
ais3.skip(7);
int ret2 = ais3.read(data3, 7, data3.length);
if (ret2 != ret - 7)
throw new Exception("Skip doesn't work correctly (" + ret2 + " != "
+ (ret - 7) + ")");
for (int i = 7; i < ret2 + 7; i++) {
if (data3[i] != data2[i])
throw new Exception("Skip doesn't work correctly (" + data3[i]
+ " != " + data2[i] + ")");
}
}
Example 2
| Source File: SoftAudioPusher.java From jdk8u-dev-jdk with GNU General Public License v2.0 | 6 votes |
|
public void run() {
byte[] buffer = SoftAudioPusher.this.buffer;
AudioInputStream ais = SoftAudioPusher.this.ais;
SourceDataLine sourceDataLine = SoftAudioPusher.this.sourceDataLine;
try {
while (active) {
// Read from audio source
int count = ais.read(buffer);
if(count < 0) break;
// Write byte buffer to source output
sourceDataLine.write(buffer, 0, count);
}
} catch (IOException e) {
active = false;
//e.printStackTrace();
}
}
Example 3
| Source File: JavaSoundAudioClip.java From jdk8u_jdk with GNU General Public License v2.0 | 6 votes |
|
private void readStream(AudioInputStream as, long byteLen) throws IOException {
// arrays "only" max. 2GB
int intLen;
if (byteLen > 2147483647) {
intLen = 2147483647;
} else {
intLen = (int) byteLen;
}
loadedAudio = new byte[intLen];
loadedAudioByteLength = 0;
// this loop may throw an IOException
while (true) {
int bytesRead = as.read(loadedAudio, loadedAudioByteLength, intLen - loadedAudioByteLength);
if (bytesRead <= 0) {
as.close();
break;
}
loadedAudioByteLength += bytesRead;
}
}
Example 4
| Source File: AlawEncoderSync.java From jdk8u-dev-jdk with GNU General Public License v2.0 | 6 votes |
|
@Override
public void run() {
log("ConversionThread[" + num + "] started.");
try {
InputStream inStream = new ByteArrayInputStream(pcmBuffer);
AudioInputStream pcmStream = new AudioInputStream(
inStream, pcmFormat, AudioSystem.NOT_SPECIFIED);
AudioInputStream alawStream = AudioSystem.getAudioInputStream(alawFormat, pcmStream);
ByteArrayOutputStream outStream = new ByteArrayOutputStream();
int read = 0;
byte[] data = new byte[4096];
while((read = alawStream.read(data)) != -1) {
outStream.write(data, 0, read);
}
alawStream.close();
resultArray = outStream.toByteArray();
} catch (Exception ex) {
log("ConversionThread[" + num + "] exception:");
log(ex);
}
log("ConversionThread[" + num + "] completed.");
}
Example 5
| Source File: WaveFloatFileWriter.java From openjdk-8 with GNU General Public License v2.0 | 6 votes |
|
public void write(AudioInputStream stream, RIFFWriter writer)
throws IOException {
RIFFWriter fmt_chunk = writer.writeChunk("fmt ");
AudioFormat format = stream.getFormat();
fmt_chunk.writeUnsignedShort(3); // WAVE_FORMAT_IEEE_FLOAT
fmt_chunk.writeUnsignedShort(format.getChannels());
fmt_chunk.writeUnsignedInt((int) format.getSampleRate());
fmt_chunk.writeUnsignedInt(((int) format.getFrameRate())
* format.getFrameSize());
fmt_chunk.writeUnsignedShort(format.getFrameSize());
fmt_chunk.writeUnsignedShort(format.getSampleSizeInBits());
fmt_chunk.close();
RIFFWriter data_chunk = writer.writeChunk("data");
byte[] buff = new byte[1024];
int len;
while ((len = stream.read(buff, 0, buff.length)) != -1)
data_chunk.write(buff, 0, len);
data_chunk.close();
}
Example 6
| Source File: Sample.java From mpcmaid with GNU Lesser General Public License v2.1 | 6 votes |
|
private static Sample open(final AudioInputStream audioStream) throws LineUnavailableException, IOException {
final int frameLength = (int) audioStream.getFrameLength();
if (frameLength > 44100 * 8 * 2) {
throw new IllegalArgumentException("The audio file is too long (must be shorter than 4 bars at 50BPM)");
}
final AudioFormat format = audioStream.getFormat();
final int frameSize = (int) format.getFrameSize();
final byte[] bytes = new byte[frameLength * frameSize];
final int result = audioStream.read(bytes);
if (result < 0) {
return null;
}
audioStream.close();
return new Sample(bytes, format, frameLength);
}
Example 7
| Source File: SkipTest.java From jdk8u-jdk with GNU General Public License v2.0 | 6 votes |
|
public static void main(String[] args) throws Exception {
AudioFloatFormatConverter converter = new AudioFloatFormatConverter();
byte[] data = { 10, 20, 30, 40, 30, 20, 10 };
AudioFormat format = new AudioFormat(8000, 8, 1, true, false);
AudioFormat format2 = new AudioFormat(16000, 8, 1, true, false);
AudioInputStream ais = new AudioInputStream(new ByteArrayInputStream(
data), format, data.length);
AudioInputStream ais2 = converter.getAudioInputStream(format2, ais);
byte[] data2 = new byte[30];
int ret = ais2.read(data2, 0, data2.length);
ais.reset();
AudioInputStream ais3 = converter.getAudioInputStream(format2, ais);
byte[] data3 = new byte[100];
ais3.skip(7);
int ret2 = ais3.read(data3, 7, data3.length);
if (ret2 != ret - 7)
throw new Exception("Skip doesn't work correctly (" + ret2 + " != "
+ (ret - 7) + ")");
for (int i = 7; i < ret2 + 7; i++) {
if (data3[i] != data2[i])
throw new Exception("Skip doesn't work correctly (" + data3[i]
+ " != " + data2[i] + ")");
}
}
Example 8
| Source File: JavaSoundAudioClip.java From Bytecoder with Apache License 2.0 | 6 votes |
|
private void readStream(AudioInputStream as) throws IOException {
DirectBAOS baos = new DirectBAOS();
byte[] buffer = new byte[16384];
int bytesRead = 0;
int totalBytesRead = 0;
// this loop may throw an IOException
while( true ) {
bytesRead = as.read(buffer, 0, buffer.length);
if (bytesRead <= 0) {
as.close();
break;
}
totalBytesRead += bytesRead;
baos.write(buffer, 0, bytesRead);
}
loadedAudio = baos.getInternalBuffer();
loadedAudioByteLength = totalBytesRead;
}
Example 9
| Source File: WaveFloatFileWriter.java From openjdk-8-source with GNU General Public License v2.0 | 6 votes |
|
public void write(AudioInputStream stream, RIFFWriter writer)
throws IOException {
RIFFWriter fmt_chunk = writer.writeChunk("fmt ");
AudioFormat format = stream.getFormat();
fmt_chunk.writeUnsignedShort(3); // WAVE_FORMAT_IEEE_FLOAT
fmt_chunk.writeUnsignedShort(format.getChannels());
fmt_chunk.writeUnsignedInt((int) format.getSampleRate());
fmt_chunk.writeUnsignedInt(((int) format.getFrameRate())
* format.getFrameSize());
fmt_chunk.writeUnsignedShort(format.getFrameSize());
fmt_chunk.writeUnsignedShort(format.getSampleSizeInBits());
fmt_chunk.close();
RIFFWriter data_chunk = writer.writeChunk("data");
byte[] buff = new byte[1024];
int len;
while ((len = stream.read(buff, 0, buff.length)) != -1)
data_chunk.write(buff, 0, len);
data_chunk.close();
}
Example 10
| Source File: SoftAudioPusher.java From openjdk-jdk8u-backup with GNU General Public License v2.0 | 6 votes |
|
public void run() {
byte[] buffer = SoftAudioPusher.this.buffer;
AudioInputStream ais = SoftAudioPusher.this.ais;
SourceDataLine sourceDataLine = SoftAudioPusher.this.sourceDataLine;
try {
while (active) {
// Read from audio source
int count = ais.read(buffer);
if(count < 0) break;
// Write byte buffer to source output
sourceDataLine.write(buffer, 0, count);
}
} catch (IOException e) {
active = false;
//e.printStackTrace();
}
}
Example 11
| Source File: JavaSoundAudioClip.java From jdk8u60 with GNU General Public License v2.0 | 6 votes |
|
private void readStream(AudioInputStream as, long byteLen) throws IOException {
// arrays "only" max. 2GB
int intLen;
if (byteLen > 2147483647) {
intLen = 2147483647;
} else {
intLen = (int) byteLen;
}
loadedAudio = new byte[intLen];
loadedAudioByteLength = 0;
// this loop may throw an IOException
while (true) {
int bytesRead = as.read(loadedAudio, loadedAudioByteLength, intLen - loadedAudioByteLength);
if (bytesRead <= 0) {
as.close();
break;
}
loadedAudioByteLength += bytesRead;
}
}
Example 12
| Source File: AudioFileSoundbankReader.java From Bytecoder with Apache License 2.0 | 5 votes |
|
public Soundbank getSoundbank(AudioInputStream ais)
throws InvalidMidiDataException, IOException {
try {
byte[] buffer;
if (ais.getFrameLength() == -1) {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
byte[] buff = new byte[1024
- (1024 % ais.getFormat().getFrameSize())];
int ret;
while ((ret = ais.read(buff)) != -1) {
baos.write(buff, 0, ret);
}
ais.close();
buffer = baos.toByteArray();
} else {
buffer = new byte[(int) (ais.getFrameLength()
* ais.getFormat().getFrameSize())];
new DataInputStream(ais).readFully(buffer);
}
ModelByteBufferWavetable osc = new ModelByteBufferWavetable(
new ModelByteBuffer(buffer), ais.getFormat(), -4800);
ModelPerformer performer = new ModelPerformer();
performer.getOscillators().add(osc);
SimpleSoundbank sbk = new SimpleSoundbank();
SimpleInstrument ins = new SimpleInstrument();
ins.add(performer);
sbk.addInstrument(ins);
return sbk;
} catch (Exception e) {
return null;
}
}
Example 13
| Source File: SoftMixingClip.java From jdk8u-jdk with GNU General Public License v2.0 | 5 votes |
|
public void open(AudioInputStream stream) throws LineUnavailableException,
IOException {
if (isOpen()) {
throw new IllegalStateException("Clip is already open with format "
+ getFormat() + " and frame lengh of " + getFrameLength());
}
if (AudioFloatConverter.getConverter(stream.getFormat()) == null)
throw new IllegalArgumentException("Invalid format : "
+ stream.getFormat().toString());
if (stream.getFrameLength() != AudioSystem.NOT_SPECIFIED) {
byte[] data = new byte[(int) stream.getFrameLength()
* stream.getFormat().getFrameSize()];
int readsize = 512 * stream.getFormat().getFrameSize();
int len = 0;
while (len != data.length) {
if (readsize > data.length - len)
readsize = data.length - len;
int ret = stream.read(data, len, readsize);
if (ret == -1)
break;
if (ret == 0)
Thread.yield();
len += ret;
}
open(stream.getFormat(), data, 0, len);
} else {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
byte[] b = new byte[512 * stream.getFormat().getFrameSize()];
int r = 0;
while ((r = stream.read(b)) != -1) {
if (r == 0)
Thread.yield();
baos.write(b, 0, r);
}
open(stream.getFormat(), baos.toByteArray(), 0, baos.size());
}
}
Example 14
| Source File: AudioFileSoundbankReader.java From TencentKona-8 with GNU General Public License v2.0 | 5 votes |
|
public Soundbank getSoundbank(AudioInputStream ais)
throws InvalidMidiDataException, IOException {
try {
byte[] buffer;
if (ais.getFrameLength() == -1) {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
byte[] buff = new byte[1024
- (1024 % ais.getFormat().getFrameSize())];
int ret;
while ((ret = ais.read(buff)) != -1) {
baos.write(buff, 0, ret);
}
ais.close();
buffer = baos.toByteArray();
} else {
buffer = new byte[(int) (ais.getFrameLength()
* ais.getFormat().getFrameSize())];
new DataInputStream(ais).readFully(buffer);
}
ModelByteBufferWavetable osc = new ModelByteBufferWavetable(
new ModelByteBuffer(buffer), ais.getFormat(), -4800);
ModelPerformer performer = new ModelPerformer();
performer.getOscillators().add(osc);
SimpleSoundbank sbk = new SimpleSoundbank();
SimpleInstrument ins = new SimpleInstrument();
ins.add(performer);
sbk.addInstrument(ins);
return sbk;
} catch (Exception e) {
return null;
}
}
Example 15
| Source File: SoftMixingClip.java From jdk8u-dev-jdk with GNU General Public License v2.0 | 5 votes |
|
public void open(AudioInputStream stream) throws LineUnavailableException,
IOException {
if (isOpen()) {
throw new IllegalStateException("Clip is already open with format "
+ getFormat() + " and frame lengh of " + getFrameLength());
}
if (AudioFloatConverter.getConverter(stream.getFormat()) == null)
throw new IllegalArgumentException("Invalid format : "
+ stream.getFormat().toString());
if (stream.getFrameLength() != AudioSystem.NOT_SPECIFIED) {
byte[] data = new byte[(int) stream.getFrameLength()
* stream.getFormat().getFrameSize()];
int readsize = 512 * stream.getFormat().getFrameSize();
int len = 0;
while (len != data.length) {
if (readsize > data.length - len)
readsize = data.length - len;
int ret = stream.read(data, len, readsize);
if (ret == -1)
break;
if (ret == 0)
Thread.yield();
len += ret;
}
open(stream.getFormat(), data, 0, len);
} else {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
byte[] b = new byte[512 * stream.getFormat().getFrameSize()];
int r = 0;
while ((r = stream.read(b)) != -1) {
if (r == 0)
Thread.yield();
baos.write(b, 0, r);
}
open(stream.getFormat(), baos.toByteArray(), 0, baos.size());
}
}
Example 16
| Source File: TestPreciseTimestampRendering.java From openjdk-jdk9 with GNU General Public License v2.0 | 4 votes |
|
public static void test(Soundbank soundbank) throws Exception {
// Create instance of synthesizer using the testing soundbank above
AudioSynthesizer synth = new SoftSynthesizer();
AudioInputStream stream = synth.openStream(format, null);
synth.unloadAllInstruments(synth.getDefaultSoundbank());
synth.loadAllInstruments(soundbank);
Receiver recv = synth.getReceiver();
// Set volume to max and turn reverb off
ShortMessage reverb_off = new ShortMessage();
reverb_off.setMessage(ShortMessage.CONTROL_CHANGE, 91, 0);
recv.send(reverb_off, -1);
ShortMessage full_volume = new ShortMessage();
full_volume.setMessage(ShortMessage.CONTROL_CHANGE, 7, 127);
recv.send(full_volume, -1);
Random random = new Random(3485934583945l);
// Create random timestamps
long[] test_timestamps = new long[30];
for (int i = 1; i < test_timestamps.length; i++) {
test_timestamps[i] = i * 44100
+ (int) (random.nextDouble() * 22050.0);
}
// Send midi note on message to synthesizer
for (int i = 0; i < test_timestamps.length; i++) {
ShortMessage midi_on = new ShortMessage();
midi_on.setMessage(ShortMessage.NOTE_ON, 69, 127);
recv.send(midi_on,
(long) ((test_timestamps[i] / 44100.0) * 1000000.0));
}
// Measure timing from rendered audio
float[] fbuffer = new float[100];
byte[] buffer = new byte[fbuffer.length * format.getFrameSize()];
long firsts = -1;
int counter = 0;
long s = 0;
long max_jitter = 0;
outerloop: for (int k = 0; k < 10000000; k++) {
stream.read(buffer);
AudioFloatConverter.getConverter(format).toFloatArray(buffer,
fbuffer);
for (int i = 0; i < fbuffer.length; i++) {
if (fbuffer[i] != 0) {
if (firsts == -1)
firsts = s;
long measure_time = (s - firsts);
long predicted_time = test_timestamps[counter];
long jitter = Math.abs(measure_time - predicted_time);
if (jitter > 10)
max_jitter = jitter;
counter++;
if (counter == test_timestamps.length)
break outerloop;
}
s++;
}
}
synth.close();
if (counter == 0)
throw new Exception("Nothing was measured!");
if (max_jitter != 0) {
throw new Exception("Jitter has occurred! "
+ "(max jitter = " + max_jitter + ")");
}
}
Example 17
| Source File: TestPreciseTimestampRendering.java From jdk8u_jdk with GNU General Public License v2.0 | 4 votes |
|
public static void test(Soundbank soundbank) throws Exception {
// Create instance of synthesizer using the testing soundbank above
AudioSynthesizer synth = new SoftSynthesizer();
AudioInputStream stream = synth.openStream(format, null);
synth.unloadAllInstruments(synth.getDefaultSoundbank());
synth.loadAllInstruments(soundbank);
Receiver recv = synth.getReceiver();
// Set volume to max and turn reverb off
ShortMessage reverb_off = new ShortMessage();
reverb_off.setMessage(ShortMessage.CONTROL_CHANGE, 91, 0);
recv.send(reverb_off, -1);
ShortMessage full_volume = new ShortMessage();
full_volume.setMessage(ShortMessage.CONTROL_CHANGE, 7, 127);
recv.send(full_volume, -1);
Random random = new Random(3485934583945l);
// Create random timestamps
long[] test_timestamps = new long[30];
for (int i = 1; i < test_timestamps.length; i++) {
test_timestamps[i] = i * 44100
+ (int) (random.nextDouble() * 22050.0);
}
// Send midi note on message to synthesizer
for (int i = 0; i < test_timestamps.length; i++) {
ShortMessage midi_on = new ShortMessage();
midi_on.setMessage(ShortMessage.NOTE_ON, 69, 127);
recv.send(midi_on,
(long) ((test_timestamps[i] / 44100.0) * 1000000.0));
}
// Measure timing from rendered audio
float[] fbuffer = new float[100];
byte[] buffer = new byte[fbuffer.length * format.getFrameSize()];
long firsts = -1;
int counter = 0;
long s = 0;
long max_jitter = 0;
outerloop: for (int k = 0; k < 10000000; k++) {
stream.read(buffer);
AudioFloatConverter.getConverter(format).toFloatArray(buffer,
fbuffer);
for (int i = 0; i < fbuffer.length; i++) {
if (fbuffer[i] != 0) {
if (firsts == -1)
firsts = s;
long measure_time = (s - firsts);
long predicted_time = test_timestamps[counter];
long jitter = Math.abs(measure_time - predicted_time);
if (jitter > 10)
max_jitter = jitter;
counter++;
if (counter == test_timestamps.length)
break outerloop;
}
s++;
}
}
synth.close();
if (counter == 0)
throw new Exception("Nothing was measured!");
if (max_jitter != 0) {
throw new Exception("Jitter has occurred! "
+ "(max jitter = " + max_jitter + ")");
}
}
Example 18
| Source File: SoftSynthesizer.java From openjdk-jdk8u with GNU General Public License v2.0 | 4 votes |
|
public int read(byte[] b, int off, int len) throws IOException {
AudioInputStream local_stream = stream;
if(local_stream != null)
return local_stream.read(b, off, len);
else
{
int flen = len / samplesize;
if(silentbuffer == null || silentbuffer.length < flen)
silentbuffer = new float[flen];
converter.toByteArray(silentbuffer, flen, b, off);
silent_samples += (long)((len / framesize));
if(pusher != null)
if(weak_stream_link.get() == null)
{
Runnable runnable = new Runnable()
{
SoftAudioPusher _pusher = pusher;
AudioInputStream _jitter_stream = jitter_stream;
SourceDataLine _sourceDataLine = sourceDataLine;
public void run()
{
_pusher.stop();
if(_jitter_stream != null)
try {
_jitter_stream.close();
} catch (IOException e) {
e.printStackTrace();
}
if(_sourceDataLine != null)
_sourceDataLine.close();
}
};
pusher = null;
jitter_stream = null;
sourceDataLine = null;
new Thread(runnable).start();
}
return len;
}
}
Example 19
| Source File: TestPreciseTimestampRendering.java From TencentKona-8 with GNU General Public License v2.0 | 4 votes |
|
public static void test(Soundbank soundbank) throws Exception {
// Create instance of synthesizer using the testing soundbank above
AudioSynthesizer synth = new SoftSynthesizer();
AudioInputStream stream = synth.openStream(format, null);
synth.unloadAllInstruments(synth.getDefaultSoundbank());
synth.loadAllInstruments(soundbank);
Receiver recv = synth.getReceiver();
// Set volume to max and turn reverb off
ShortMessage reverb_off = new ShortMessage();
reverb_off.setMessage(ShortMessage.CONTROL_CHANGE, 91, 0);
recv.send(reverb_off, -1);
ShortMessage full_volume = new ShortMessage();
full_volume.setMessage(ShortMessage.CONTROL_CHANGE, 7, 127);
recv.send(full_volume, -1);
Random random = new Random(3485934583945l);
// Create random timestamps
long[] test_timestamps = new long[30];
for (int i = 1; i < test_timestamps.length; i++) {
test_timestamps[i] = i * 44100
+ (int) (random.nextDouble() * 22050.0);
}
// Send midi note on message to synthesizer
for (int i = 0; i < test_timestamps.length; i++) {
ShortMessage midi_on = new ShortMessage();
midi_on.setMessage(ShortMessage.NOTE_ON, 69, 127);
recv.send(midi_on,
(long) ((test_timestamps[i] / 44100.0) * 1000000.0));
}
// Measure timing from rendered audio
float[] fbuffer = new float[100];
byte[] buffer = new byte[fbuffer.length * format.getFrameSize()];
long firsts = -1;
int counter = 0;
long s = 0;
long max_jitter = 0;
outerloop: for (int k = 0; k < 10000000; k++) {
stream.read(buffer);
AudioFloatConverter.getConverter(format).toFloatArray(buffer,
fbuffer);
for (int i = 0; i < fbuffer.length; i++) {
if (fbuffer[i] != 0) {
if (firsts == -1)
firsts = s;
long measure_time = (s - firsts);
long predicted_time = test_timestamps[counter];
long jitter = Math.abs(measure_time - predicted_time);
if (jitter > 10)
max_jitter = jitter;
counter++;
if (counter == test_timestamps.length)
break outerloop;
}
s++;
}
}
synth.close();
if (counter == 0)
throw new Exception("Nothing was measured!");
if (max_jitter != 0) {
throw new Exception("Jitter has occurred! "
+ "(max jitter = " + max_jitter + ")");
}
}
Example 20
| Source File: TestPreciseTimestampRendering.java From jdk8u-dev-jdk with GNU General Public License v2.0 | 4 votes |
|
public static void test(Soundbank soundbank) throws Exception {
// Create instance of synthesizer using the testing soundbank above
AudioSynthesizer synth = new SoftSynthesizer();
AudioInputStream stream = synth.openStream(format, null);
synth.unloadAllInstruments(synth.getDefaultSoundbank());
synth.loadAllInstruments(soundbank);
Receiver recv = synth.getReceiver();
// Set volume to max and turn reverb off
ShortMessage reverb_off = new ShortMessage();
reverb_off.setMessage(ShortMessage.CONTROL_CHANGE, 91, 0);
recv.send(reverb_off, -1);
ShortMessage full_volume = new ShortMessage();
full_volume.setMessage(ShortMessage.CONTROL_CHANGE, 7, 127);
recv.send(full_volume, -1);
Random random = new Random(3485934583945l);
// Create random timestamps
long[] test_timestamps = new long[30];
for (int i = 1; i < test_timestamps.length; i++) {
test_timestamps[i] = i * 44100
+ (int) (random.nextDouble() * 22050.0);
}
// Send midi note on message to synthesizer
for (int i = 0; i < test_timestamps.length; i++) {
ShortMessage midi_on = new ShortMessage();
midi_on.setMessage(ShortMessage.NOTE_ON, 69, 127);
recv.send(midi_on,
(long) ((test_timestamps[i] / 44100.0) * 1000000.0));
}
// Measure timing from rendered audio
float[] fbuffer = new float[100];
byte[] buffer = new byte[fbuffer.length * format.getFrameSize()];
long firsts = -1;
int counter = 0;
long s = 0;
long max_jitter = 0;
outerloop: for (int k = 0; k < 10000000; k++) {
stream.read(buffer);
AudioFloatConverter.getConverter(format).toFloatArray(buffer,
fbuffer);
for (int i = 0; i < fbuffer.length; i++) {
if (fbuffer[i] != 0) {
if (firsts == -1)
firsts = s;
long measure_time = (s - firsts);
long predicted_time = test_timestamps[counter];
long jitter = Math.abs(measure_time - predicted_time);
if (jitter > 10)
max_jitter = jitter;
counter++;
if (counter == test_timestamps.length)
break outerloop;
}
s++;
}
}
synth.close();
if (counter == 0)
throw new Exception("Nothing was measured!");
if (max_jitter != 0) {
throw new Exception("Jitter has occurred! "
+ "(max jitter = " + max_jitter + ")");
}
}
