1 files changed, 114 insertions, 0 deletions
diff --git a/src/test/java/com/jsyn/engine/TestWaveFileReadWrite.java b/src/test/java/com/jsyn/engine/TestWaveFileReadWrite.java
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+++ b/src/test/java/com/jsyn/engine/TestWaveFileReadWrite.java
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+/*
+ * Copyright 2009 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.engine;
+
+import java.io.File;
+import java.io.IOException;
+
+import com.jsyn.data.FloatSample;
+import com.jsyn.util.SampleLoader;
+import com.jsyn.util.WaveFileWriter;
+import org.junit.jupiter.api.Test;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.fail;
+
+public class TestWaveFileReadWrite {
+
+    private static final Logger LOGGER = LoggerFactory.getLogger(TestWaveFileReadWrite.class);
+
+    public void checkWriteReadWave(int numChannels, float[] data) throws IOException {
+        File temp = File.createTempFile("test_wave", ".wav");
+        temp.deleteOnExit();
+        LOGGER.debug("Creating wave file " + temp);
+
+        WaveFileWriter writer = new WaveFileWriter(temp);
+        writer.setFrameRate(44100);
+        writer.setSamplesPerFrame(numChannels);
+        writer.setBitsPerSample(16);
+
+        for (var datum : data) {
+            writer.write(datum);
+        }
+        writer.close();
+
+        // TODO Make sure blow up if writing after close.
+        // writer.write( 0.7 );
+
+        FloatSample sample = SampleLoader.loadFloatSample(temp);
+        assertEquals(numChannels, sample.getChannelsPerFrame(), "stereo");
+        assertEquals(44100.0, sample.getFrameRate(), "frame rate");
+
+        for (int i = 0; i < data.length; i++) {
+            float v = data[i];
+            if (v > 1.0)
+                v = 1.0f;
+            else if (v < -1.0)
+                v = -1.0f;
+            assertEquals(v, sample.readDouble(i), 0.0001, "sample data");
+        }
+
+    }
+
+    @Test
+    public void testRamp() throws IOException {
+        float[] data = new float[200];
+        for (int i = 0; i < data.length; i++) {
+            data[i] = i / 1000.0f;
+        }
+
+        checkWriteReadWave(2, data);
+    }
+
+    @Test
+    public void testClippedSine() throws IOException {
+        float[] data = new float[200];
+        for (int i = 0; i < data.length; i++) {
+            double phase = i * Math.PI * 2.0 / 100;
+            data[i] = (float) (1.3 * Math.sin(phase));
+        }
+
+        checkWriteReadWave(2, data);
+    }
+
+    @Test
+    public void testArguments() throws IOException {
+        File temp = File.createTempFile("test_wave", ".wav");
+        temp.deleteOnExit();
+        LOGGER.debug("Creating wave file " + temp);
+
+        WaveFileWriter writer = new WaveFileWriter(temp);
+        writer.setBitsPerSample(16);
+        assertEquals(16, writer.getBitsPerSample(), "bitsPerSample");
+        writer.setBitsPerSample(24);
+        assertEquals(24, writer.getBitsPerSample(), "bitsPerSample");
+        try {
+            writer.setBitsPerSample(17);
+            fail("tried setting illegal value");
+        } catch (IllegalArgumentException e) {
+            // e.printStackTrace();
+            return;
+        } finally {
+            writer.close();
+        }
+
+        fail("17 generated exception");
+    }
+
+}