Add simple Java test code

2023-12-14 13:52:19 +00:00
parent adc31e77e9
commit e54fd1fd95
4 changed files with 137 additions and 2 deletions
--- a/com/breakfastquay/rubberband/test/RubberBandTest.java
+++ b/com/breakfastquay/rubberband/test/RubberBandTest.java
@@ -0,0 +1,82 @@
+
+package com.breakfastquay.rubberband.test;
+
+import com.breakfastquay.rubberband.RubberBandStretcher;
+
+public class RubberBandTest
+{
+
+    public static void main(String[] args) {
+
+        int channels = 1;
+        int rate = 44100;
+        
+        RubberBandStretcher stretcher = new RubberBandStretcher
+            (rate,
+             channels,
+             RubberBandStretcher.OptionEngineFiner +
+             RubberBandStretcher.OptionProcessRealTime,
+             1.0,
+             1.0);
+
+        stretcher.setTimeRatio(1.5);
+        stretcher.setPitchScale(0.8);
+        
+        System.err.println
+            (String.format("Channel count: %d\n" +
+                           "Time ratio: %f\n" +
+                           "Pitch scale: %f\n" +
+                           "Preferred start pad: %d\n" +
+                           "Start delay: %d\n" +
+                           "Process size limit: %d",
+                           stretcher.getChannelCount(),
+                           stretcher.getTimeRatio(),
+                           stretcher.getPitchScale(),
+                           stretcher.getPreferredStartPad(),
+                           stretcher.getStartDelay(),
+                           stretcher.getProcessSizeLimit()
+                ));
+
+        int blocksize = 1024;
+        int blocks = 200;
+        double freq = 440.0;
+        
+        stretcher.setMaxProcessSize(blocksize);
+
+        float[][] buffer = new float[channels][blocksize];
+
+        int i0 = 0;
+
+        for (int block = 0; block < blocks; ++block) {
+
+            for (int c = 0; c < channels; ++c) {
+                for (int i = 0; i < blocksize; ++i) {
+                    buffer[c][i] = (float)Math.sin
+                        ((double)i0 * freq * Math.PI * 2.0 / (double)rate);
+                    ++i0;
+                }
+            }
+            
+            stretcher.process(buffer, block + 1 == blocks);
+
+            while (true) {
+                int available = stretcher.available();
+                if (available <= 0) {
+                    break;
+                }
+                int requested = available;
+                if (requested > blocksize) {
+                    requested = blocksize;
+                }
+                int obtained = stretcher.retrieve(buffer, 0, requested);
+                for (int i = 0; i < obtained; ++i) {
+                    System.out.println(Float.toString(buffer[0][i]));
+                }
+            }
+        }
+        
+        stretcher.dispose();
+    }
+    
+}
+