Adds filtering for audio description tracks

src/main/java/net/knarcraft/ffmpegconverter/converter/AnimeConverter.java

@@ -20,6 +20,7 @@ import net.knarcraft.ffmpegconverter.converter.module.output.SetVideoCodecModule
 import net.knarcraft.ffmpegconverter.converter.sorter.AudioLanguageSorter;
 import net.knarcraft.ffmpegconverter.converter.sorter.ForcedFirstSorter;
 import net.knarcraft.ffmpegconverter.converter.sorter.MinimalSubtitleSorter;
+import net.knarcraft.ffmpegconverter.converter.sorter.SpecialAudioSorter;
 import net.knarcraft.ffmpegconverter.converter.sorter.StreamSorter;
 import net.knarcraft.ffmpegconverter.converter.sorter.SubtitleLanguageSorter;
 import net.knarcraft.ffmpegconverter.converter.sorter.SubtitleTitleSorter;
@@ -95,8 +96,9 @@ public class AnimeConverter extends AbstractConverter {
         modules.add(new MapAllModule<>(probeResult.getVideoStreams()));
 
         //Get the first audio stream in accordance with chosen languages
-        StreamSorter<AudioStream> audioSorter = new AudioLanguageSorter(this.audioLanguages).append(
-                new ForcedFirstSorter<>(this.forcedAudioIndex));
+        StreamSorter<AudioStream> audioSorter = new AudioLanguageSorter(this.audioLanguages)
+                .append(new ForcedFirstSorter<>(this.forcedAudioIndex))
+                .append(new SpecialAudioSorter(MinimalSubtitlePreference.REJECT));
         List<AudioStream> sortedAudio = audioSorter.chainSort(probeResult.getAudioStreams());
         modules.add(new MapAllModule<>(sortedAudio));
         modules.add(new SetDefaultStreamModule<>(sortedAudio, 0));

src/main/java/net/knarcraft/ffmpegconverter/converter/module/mapping/BurnSubtitleModule.java

@@ -36,7 +36,7 @@ public class BurnSubtitleModule implements ConverterModule {
             FFMpegHelper.mapStream(command, videoStream);
         }
 
-        if (subtitleStream.getIsImageSubtitle()) {
+        if (subtitleStream.isImageSubtitle()) {
             command.addOutputFileOption("-filter_complex",
                     String.format("[%d:%d]scale=width=%d:height=%d,crop=w=%d:h=%d:x=0:y=out_h[sub];[%d:%d][sub]overlay",
                             subtitleStream.getInputIndex(), subtitleStream.getAbsoluteIndex(), videoStream.getWidth(),

src/main/java/net/knarcraft/ffmpegconverter/converter/sorter/MinimalSubtitleSorter.java

@@ -29,7 +29,7 @@ public class MinimalSubtitleSorter extends AbstractSorter<SubtitleStream> {
         List<SubtitleStream> fullSubtitles = new ArrayList<>();
         List<SubtitleStream> minimalSubtitles = new ArrayList<>();
         for (SubtitleStream subtitleStream : input) {
-            if (subtitleStream.getIsFullSubtitle()) {
+            if (subtitleStream.isFullSubtitle()) {
                 fullSubtitles.add(subtitleStream);
             } else {
                 minimalSubtitles.add(subtitleStream);

src/main/java/net/knarcraft/ffmpegconverter/converter/sorter/SpecialAudioSorter.java

@@ -0,0 +1,67 @@
+package net.knarcraft.ffmpegconverter.converter.sorter;
+
+import net.knarcraft.ffmpegconverter.property.MinimalSubtitlePreference;
+import net.knarcraft.ffmpegconverter.streams.AudioStream;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * A sorter for sorting/filtering subtitles by a minimal subtitle preference
+ */
+public class SpecialAudioSorter extends AbstractSorter<AudioStream> {
+
+    private final MinimalSubtitlePreference minimalSubtitlePreference;
+
+    /**
+     * Instantiates a new special audio preference sorter
+     *
+     * @param minimalSubtitlePreference <p>The minimal subtitle preference sort/filter by</p>
+     */
+    public SpecialAudioSorter(@NotNull MinimalSubtitlePreference minimalSubtitlePreference) {
+        this.minimalSubtitlePreference = minimalSubtitlePreference;
+    }
+
+    @Override
+    public @NotNull List<AudioStream> sort(@NotNull List<AudioStream> input) {
+        // Split all subtitles into full and minimal
+        List<AudioStream> normalAudio = new ArrayList<>();
+        List<AudioStream> specialAudio = new ArrayList<>();
+        for (AudioStream audioStream : input) {
+            if (audioStream.isSpecialAudio()) {
+                specialAudio.add(audioStream);
+            } else {
+                normalAudio.add(audioStream);
+            }
+        }
+
+        // Sort/filter subtitles based on full and minimal
+        switch (this.minimalSubtitlePreference) {
+            case REJECT -> {
+                // Only return full subtitles
+                return normalAudio;
+            }
+            case REQUIRE -> {
+                // Only return minimal subtitles
+                return specialAudio;
+            }
+            case NO_PREFERENCE -> {
+                // Don't change order
+                return input;
+            }
+            case PREFER -> {
+                // Sort minimal subtitles first, and full subtitles last
+                specialAudio.addAll(normalAudio);
+                return specialAudio;
+            }
+            case AVOID -> {
+                // Sort full subtitles first, and minimal subtitles last
+                normalAudio.addAll(specialAudio);
+                return normalAudio;
+            }
+            default -> throw new IllegalStateException("Unknown enum value encountered");
+        }
+    }
+
+}

src/main/java/net/knarcraft/ffmpegconverter/streams/AudioStream.java

@@ -11,6 +11,7 @@ import java.util.Map;
 public class AudioStream extends AbstractStream implements StreamObject {
 
     private final int channels;
+    private final boolean isSpecialAudio;
 
     /**
      * Instantiates a new audio stream
@@ -22,6 +23,16 @@ public class AudioStream extends AbstractStream implements StreamObject {
     public AudioStream(@NotNull Map<StreamTag, String> streamInfo, int inputIndex, int relativeIndex) {
         super(streamInfo, inputIndex, relativeIndex);
         this.channels = ValueParsingHelper.parseInt(streamInfo.get(StreamTag.CHANNELS), 0);
+        this.isSpecialAudio = checkIfIsSpecialAudio();
+    }
+
+    /**
+     * Gets whether this audio stream is a special audio stream such as audio description or music only
+     *
+     * @return <p>True if this audio stream is a special audio stream</p>
+     */
+    public boolean isSpecialAudio() {
+        return this.isSpecialAudio;
     }
 
     /**
@@ -38,4 +49,14 @@ public class AudioStream extends AbstractStream implements StreamObject {
         return 'a';
     }
 
+    /**
+     * Checks whether this audio stream is a special audio stream
+     *
+     * @return <p>True if this is a special audio stream</p>
+     */
+    private boolean checkIfIsSpecialAudio() {
+        String titleLowercase = getTitle().toLowerCase().trim();
+        return titleLowercase.matches(".*audio description.*");
+    }
+
 }

src/main/java/net/knarcraft/ffmpegconverter/streams/SubtitleStream.java

@@ -9,8 +9,8 @@ import java.util.Map;
  */
 public class SubtitleStream extends AbstractStream implements StreamObject {
 
-    final private boolean isFullSubtitle;
-    final private boolean isImageSubtitle;
+    private final boolean isFullSubtitle;
+    private final boolean isImageSubtitle;
 
     /**
      * Instantiates a new subtitle stream
@@ -21,7 +21,7 @@ public class SubtitleStream extends AbstractStream implements StreamObject {
      */
     public SubtitleStream(@NotNull Map<StreamTag, String> streamInfo, int inputIndex, int relativeIndex) {
         super(streamInfo, inputIndex, relativeIndex);
-        this.isFullSubtitle = isFullSubtitle();
+        this.isFullSubtitle = checkIfIsFullSubtitle();
         this.isImageSubtitle = codecName != null &&
                 (getCodecName().equals("hdmv_pgs_subtitle") || getCodecName().equals("dvd_subtitle"));
     }
@@ -31,7 +31,7 @@ public class SubtitleStream extends AbstractStream implements StreamObject {
      *
      * @return <p>Whether the subtitles is an image subtitle.</p>
      */
-    public boolean getIsImageSubtitle() {
+    public boolean isImageSubtitle() {
         return this.isImageSubtitle;
     }
 
@@ -40,7 +40,7 @@ public class SubtitleStream extends AbstractStream implements StreamObject {
      *
      * @return <p>Whether the subtitle is a full subtitle.</p>
      */
-    public boolean getIsFullSubtitle() {
+    public boolean isFullSubtitle() {
         return this.isFullSubtitle;
     }
 
@@ -49,7 +49,7 @@ public class SubtitleStream extends AbstractStream implements StreamObject {
      *
      * @return <p>True if the subtitle translates everything.</p>
      */
-    private boolean isFullSubtitle() {
+    private boolean checkIfIsFullSubtitle() {
         String titleLowercase = getTitle().toLowerCase().trim();
         return !titleLowercase.matches(".*si(ng|gn)s?[ &/a-z]+songs?.*") &&
                 !titleLowercase.matches(".*songs?[ &/a-z]+si(gn|ng)s?.*") &&
@@ -59,7 +59,8 @@ public class SubtitleStream extends AbstractStream implements StreamObject {
                 !titleLowercase.matches("songs?") &&
                 !titleLowercase.matches(".*signs only.*") &&
                 !titleLowercase.matches(".* signs .*") &&
-                !titleLowercase.matches("signs@.*");
+                !titleLowercase.matches("signs@.*") &&
+                !titleLowercase.matches("signs -.*");
     }
 
     @Override