Added 3 second trailer to exported songs

src/main/java/net/raphimc/noteblocktool/audio/export/AudioMerger.java → src/main/java/net/raphimc/noteblocktool/audio/export/AudioBuffer.java

@@ -19,25 +19,28 @@
 
 import net.raphimc.noteblocktool.util.SoundSampleUtil;
 
-public class AudioMerger {
+public class AudioBuffer {
 
-    private final long[] samples;
+    private long[] samples;
     private int sampleIndex;
 
-    public AudioMerger(final int sampleCount) {
-        this.samples = new long[sampleCount];
+    public AudioBuffer(final int initialSize) {
+        this.samples = new long[initialSize];
     }
 
-    public void addSamples(final int[] samples) {
+    public void pushSamples(final int[] samples) {
+        if (this.sampleIndex + samples.length >= this.samples.length) {
+            final long[] newSamples = new long[this.sampleIndex + samples.length];
+            System.arraycopy(this.samples, 0, newSamples, 0, this.samples.length);
+            this.samples = newSamples;
+        }
+
         for (int i = 0; i < samples.length; i++) {
-            final int index = this.sampleIndex + i;
-            if (index >= this.samples.length) break;
-            final int sample = samples[i];
-            this.samples[index] += sample;
+            this.samples[this.sampleIndex + i] += samples[i];
         }
     }
 
-    public void pushSamples(final int samples) {
+    public void advanceIndex(final int samples) {
         this.sampleIndex += samples;
     }
 
@@ -69,8 +72,8 @@ public int[] normalizeInts() {
     }
 
     private void normalize(final long maxValue) {
-        long max = SoundSampleUtil.getMax(this.samples);
-        float factor = (float) maxValue / max;
+        final long max = SoundSampleUtil.getMax(this.samples);
+        final float factor = (float) maxValue / max;
         for (int i = 0; i < this.samples.length; i++) {
             this.samples[i] = (long) (this.samples[i] * factor);
         }

src/main/java/net/raphimc/noteblocktool/audio/export/AudioExporter.java

@@ -69,6 +69,12 @@ public void render() throws InterruptedException {
             this.progressConsumer.accept((float) this.processedNotes / this.noteCount);
             if (Thread.currentThread().isInterrupted()) throw new InterruptedException();
         }
+
+        final int threeSeconds = Math.round(this.songView.getSpeed() * 3);
+        for (int i = 0; i < threeSeconds; i++) {
+            this.writeSamples();
+        }
+
         this.finish();
     }
 

src/main/java/net/raphimc/noteblocktool/audio/export/impl/JavaxAudioExporter.java

@@ -19,8 +19,8 @@
 
 import net.raphimc.noteblocklib.model.SongView;
 import net.raphimc.noteblocktool.audio.SoundMap;
+import net.raphimc.noteblocktool.audio.export.AudioBuffer;
 import net.raphimc.noteblocktool.audio.export.AudioExporter;
-import net.raphimc.noteblocktool.audio.export.AudioMerger;
 import net.raphimc.noteblocktool.util.SoundSampleUtil;
 
 import javax.sound.sampled.AudioFormat;
@@ -30,24 +30,24 @@
 public class JavaxAudioExporter extends AudioExporter {
 
     private final Map<String, int[]> sounds;
-    private final AudioMerger merger;
+    private final AudioBuffer merger;
 
     public JavaxAudioExporter(final SongView<?> songView, final AudioFormat format, final Consumer<Float> progressConsumer) {
         super(songView, format, progressConsumer);
         this.sounds = SoundMap.loadInstrumentSamples(format);
-        this.merger = new AudioMerger(this.samplesPerTick * format.getChannels() * songView.getLength());
+        this.merger = new AudioBuffer(this.samplesPerTick * format.getChannels() * songView.getLength());
     }
 
     @Override
     protected void processSound(final String sound, final float pitch, final float volume, final float panning) {
         if (!this.sounds.containsKey(sound)) return;
 
-        this.merger.addSamples(SoundSampleUtil.mutate(this.format, this.sounds.get(sound), pitch, volume, panning));
+        this.merger.pushSamples(SoundSampleUtil.mutate(this.format, this.sounds.get(sound), pitch, volume, panning));
     }
 
     @Override
     protected void writeSamples() {
-        this.merger.pushSamples(this.samplesPerTick * this.format.getChannels());
+        this.merger.advanceIndex(this.samplesPerTick * this.format.getChannels());
     }
 
     @Override

src/main/java/net/raphimc/noteblocktool/frames/ExportFrame.java

@@ -59,7 +59,7 @@ public class ExportFrame extends JFrame {
     private final List<ListFrame.LoadedSong> loadedSongs;
     private final JComboBox<String> format = new JComboBox<>(new String[]{"NBS", "WAV", "AIF"});
     private final JLabel soundSystemLabel = new JLabel("Sound System:");
-    private final JComboBox<String> soundSystem = new JComboBox<>(new String[]{"OpenAL (better sound quality)", "Javax (multithreaded, normalized)"});
+    private final JComboBox<String> soundSystem = new JComboBox<>(new String[]{"OpenAL (better sound quality)", "Javax (parallel capable, normalized)"});
     private final JLabel sampleRateLabel = new JLabel("Sample Rate:");
     private final JSpinner sampleRate = new JSpinner(new SpinnerNumberModel(44_100, 8_000, 192_000, 1_000));
     private final JLabel bitDepthLabel = new JLabel("PCM Bit Depth:");