Add audio buffer sample unit test

Author: shai-almog

maven/core-unittests/src/test/java/com/codename1/media/AudioBufferSampleTest.java

@@ -0,0 +1,79 @@
+package com.codename1.media;
+
+import com.codename1.capture.Capture;
+import com.codename1.io.File;
+import com.codename1.io.FileSystemStorage;
+import com.codename1.io.Util;
+import com.codename1.junit.FormTest;
+import com.codename1.junit.UITestBase;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+class AudioBufferSampleTest extends UITestBase {
+
+    @FormTest
+    void captureAudioRedirectsFramesToBufferAndPersistsWav() throws Exception {
+        FileSystemStorage fs = FileSystemStorage.getInstance();
+        implementation.clearFileSystem();
+        implementation.clearAudioCaptureFrames();
+        String recordingsDir = fs.getAppHomePath() + "recordings/";
+        fs.mkdir(recordingsDir);
+
+        String bufferPath = "tmpBuffer.pcm";
+        int wavSampleRate = 16000;
+        AudioBuffer audioBuffer = MediaManager.getAudioBuffer(bufferPath, true, 8);
+        final float[] captured = new float[audioBuffer.getMaxSize()];
+        final int[] callbackCount = new int[1];
+        final int[] lastSampleRate = new int[1];
+        final int[] lastSize = new int[1];
+
+        WAVWriter writer = new WAVWriter(new File("tmpBuffer.wav"), wavSampleRate, 1, 16);
+        try {
+            audioBuffer.addCallback(new AudioBuffer.AudioBufferCallback() {
+                public void frameReceived(AudioBuffer buffer) {
+                    if (buffer.getSampleRate() > wavSampleRate) {
+                        buffer.downSample(wavSampleRate);
+                    }
+                    buffer.copyTo(captured);
+                    lastSampleRate[0] = buffer.getSampleRate();
+                    lastSize[0] = buffer.getSize();
+                    callbackCount[0]++;
+                    try {
+                        writer.write(captured, 0, buffer.getSize());
+                    } catch (Exception e) {
+                        throw new RuntimeException(e);
+                    }
+                }
+            });
+
+            MediaRecorderBuilder options = new MediaRecorderBuilder()
+                    .audioChannels(1)
+                    .redirectToAudioBuffer(true)
+                    .path(bufferPath);
+
+            implementation.addAudioCaptureFrame(32000, 1, new float[]{1f, 0.5f, -0.5f, -1f});
+
+            Capture.captureAudio(options);
+
+            writer.close();
+
+            String copyPath = recordingsDir + "sample.wav";
+            Util.copy(fs.openInputStream(new File("tmpBuffer.wav").getAbsolutePath()), fs.openOutputStream(copyPath));
+
+            assertEquals(1, callbackCount[0]);
+            assertEquals(wavSampleRate, lastSampleRate[0]);
+            assertTrue(lastSize[0] > 0);
+            assertSame(options, implementation.getLastMediaRecorderBuilder());
+            assertTrue(fs.exists(copyPath));
+            assertTrue(fs.getFileLength(copyPath) > 44);
+        } finally {
+            MediaManager.releaseAudioBuffer(bufferPath);
+            try {
+                writer.close();
+            } catch (Exception ignored) {
+            }
+            implementation.clearFileSystem();
+        }
+    }
+}
+

maven/core-unittests/src/test/java/com/codename1/testing/TestCodenameOneImplementation.java

@@ -13,7 +13,9 @@
 import com.codename1.payment.Purchase;
 import com.codename1.l10n.L10NManager;
 import com.codename1.location.LocationManager;
+import com.codename1.media.AudioBuffer;
 import com.codename1.media.Media;
+import com.codename1.media.MediaManager;
 import com.codename1.media.MediaRecorderBuilder;
 import com.codename1.messaging.Message;
 import com.codename1.notifications.LocalNotification;
@@ -174,6 +176,7 @@ public class TestCodenameOneImplementation extends CodenameOneImplementation {
     private String nextCaptureAudioPath = "file://test-audio.wav";
     private MediaRecorderBuilder lastMediaRecorderBuilder;
     private VideoCaptureConstraints lastVideoConstraints;
+    private final List<AudioCaptureFrame> audioCaptureFrames = new ArrayList<AudioCaptureFrame>();
 
 
     public TestCodenameOneImplementation() {
@@ -3408,6 +3411,15 @@ public void captureAudio(MediaRecorderBuilder recordingOptions, ActionListener r
             recordingOptions = new MediaRecorderBuilder();
         }
         lastMediaRecorderBuilder = recordingOptions;
+        if (recordingOptions.isRedirectToAudioBuffer()) {
+            AudioBuffer buffer = MediaManager.getAudioBuffer(recordingOptions.getPath());
+            if (buffer != null) {
+                for (AudioCaptureFrame frame : audioCaptureFrames) {
+                    buffer.copyFrom(frame.getSampleRate(), frame.getNumChannels(), frame.getSamples());
+                }
+            }
+            audioCaptureFrames.clear();
+        }
         response.actionPerformed(new ActionEvent(nextCaptureAudioPath));
     }
 
@@ -3438,10 +3450,42 @@ public MediaRecorderBuilder getLastMediaRecorderBuilder() {
         return lastMediaRecorderBuilder;
     }
 
+    public void addAudioCaptureFrame(int sampleRate, int numChannels, float[] samples) {
+        audioCaptureFrames.add(new AudioCaptureFrame(sampleRate, numChannels, samples));
+    }
+
+    public void clearAudioCaptureFrames() {
+        audioCaptureFrames.clear();
+    }
+
     public VideoCaptureConstraints getLastVideoConstraints() {
         return lastVideoConstraints;
     }
 
+    private static final class AudioCaptureFrame {
+        private final int sampleRate;
+        private final int numChannels;
+        private final float[] samples;
+
+        private AudioCaptureFrame(int sampleRate, int numChannels, float[] samples) {
+            this.sampleRate = sampleRate;
+            this.numChannels = numChannels;
+            this.samples = Arrays.copyOf(samples, samples.length);
+        }
+
+        private int getSampleRate() {
+            return sampleRate;
+        }
+
+        private int getNumChannels() {
+            return numChannels;
+        }
+
+        private float[] getSamples() {
+            return Arrays.copyOf(samples, samples.length);
+        }
+    }
+
     public static final class TestFile {
         final boolean directory;
         final byte[] content;