114 lines
3.6 KiB
Java
114 lines
3.6 KiB
Java
/**
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* @test
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* @bug 6938426
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* @summary Tests that Alaw encoder works properly in multithreaded environment
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* @author Alex Menkov
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*/
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import java.io.ByteArrayInputStream;
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import java.io.ByteArrayOutputStream;
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import java.io.InputStream;
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import java.util.Arrays;
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import javax.sound.sampled.AudioFormat;
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import javax.sound.sampled.AudioInputStream;
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import javax.sound.sampled.AudioSystem;
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public class AlawEncoderSync {
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static final int THREAD_COUNT = 20;
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static final AudioFormat pcmFormat = new AudioFormat(8000f, 16, 2, true, false);
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static final int STREAM_LENGTH = 10; // in seconds
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static byte[] pcmBuffer;
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static final AudioFormat alawFormat
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= new AudioFormat(AudioFormat.Encoding.ALAW, 8000f, 8, 2, 2, 8000f, false);
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static final ConversionThread[] threads = new ConversionThread[THREAD_COUNT];
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public static void main(String[] args) {
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preparePCMBuffer();
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log("pcmStream size: " + pcmBuffer.length);
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for (int i=0; i<THREAD_COUNT; i++) {
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threads[i] = new ConversionThread(i);
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threads[i].start();
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}
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for (int i=1; i<THREAD_COUNT; i++) {
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try {
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threads[i].join();
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} catch (InterruptedException ex) {
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log("Main thread was interrupted, exiting.");
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return;
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}
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}
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int failed = 0;
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log("comparing result arrays...");
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for (int i=1; i<THREAD_COUNT; i++) {
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if (!Arrays.equals(threads[0].resultArray, threads[i].resultArray)) {
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failed++;
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log("NOT equals: 0 and " + i);
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}
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}
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if (failed > 0) {
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throw new RuntimeException("test FAILED");
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}
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log("test PASSED.");
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}
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static void preparePCMBuffer() {
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pcmBuffer = new byte[STREAM_LENGTH * (int)pcmFormat.getSampleRate()
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* (pcmFormat.getSampleSizeInBits() / 8) * pcmFormat.getChannels()];
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for (int i=0; i<pcmBuffer.length; i++) {
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pcmBuffer[i] = (byte)(Math.random() * 256.0 - 128.0);
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}
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}
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static AudioInputStream createPCMStream() {
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InputStream byteStream = new ByteArrayInputStream(pcmBuffer);
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return new AudioInputStream(byteStream, pcmFormat, AudioSystem.NOT_SPECIFIED);
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}
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static class ConversionThread extends Thread {
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public final int num;
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public byte[] resultArray = null;
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public ConversionThread(int num) {
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this.num = num;
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}
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@Override
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public void run() {
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log("ConversionThread[" + num + "] started.");
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try {
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InputStream inStream = new ByteArrayInputStream(pcmBuffer);
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AudioInputStream pcmStream = new AudioInputStream(
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inStream, pcmFormat, AudioSystem.NOT_SPECIFIED);
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AudioInputStream alawStream = AudioSystem.getAudioInputStream(alawFormat, pcmStream);
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ByteArrayOutputStream outStream = new ByteArrayOutputStream();
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int read = 0;
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byte[] data = new byte[4096];
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while((read = alawStream.read(data)) != -1) {
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outStream.write(data, 0, read);
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}
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alawStream.close();
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resultArray = outStream.toByteArray();
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} catch (Exception ex) {
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log("ConversionThread[" + num + "] exception:");
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log(ex);
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}
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log("ConversionThread[" + num + "] completed.");
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}
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}
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static void log(String s) {
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System.out.println(s);
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}
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static void log(Exception ex) {
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ex.printStackTrace(System.out);
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}
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}
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