Adds some extra abstraction to streams

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

@@ -0,0 +1,25 @@
+package net.knarcraft.ffmpegconverter.streams;
+
+/**
+ * An object representation of a stream in a media file
+ */
+public abstract class AbstractStream implements StreamObject {
+    int absoluteIndex;
+    int relativeIndex;
+    String codecName;
+
+    @Override
+    public String getCodecName() {
+        return this.codecName;
+    }
+
+    @Override
+    public int getAbsoluteIndex() {
+        return this.absoluteIndex;
+    }
+
+    @Override
+    public int getRelativeIndex() {
+        return this.relativeIndex;
+    }
+}

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

@@ -3,7 +3,7 @@ package net.knarcraft.ffmpegconverter.streams;
 /**
  * This class represents an ffmpeg audio stream
  */
-public class AudioStream extends StreamObject {
+public class AudioStream extends AbstractStream implements StreamObject {
     private final String language;
     private final int channels;
     private final String title;
@@ -19,7 +19,6 @@ public class AudioStream extends StreamObject {
      * @param channels      <p>The number of channels for the audio stream.</p>
      */
     public AudioStream(String codecName, int absoluteIndex, int relativeIndex, String language, String title, int channels) {
-        this.codecType = "audio";
         this.codecName = codecName;
         this.absoluteIndex = absoluteIndex;
         this.language = language;

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

@@ -1,47 +1,26 @@
 package net.knarcraft.ffmpegconverter.streams;
 
-/**
- * An object representation of a stream in a media file
- */
-public abstract class StreamObject {
-    int absoluteIndex;
-    int relativeIndex;
-    String codecName;
-    String codecType;
-
-    /**
-     * Gets the type of the stream codec (video/audio/subtitle)
-     *
-     * @return <p>Codec type.</p>
-     */
-    public String getCodecType() {
-        return this.codecType;
-    }
+public interface StreamObject {
 
     /**
      * Gets the name of the stream codec
      *
      * @return <p>Codec name.</p>
      */
-    String getCodecName() {
-        return this.codecName;
-    }
+    String getCodecName();
 
     /**
      * Gets the absolute index of a stream object
      *
      * @return <p>Absolute index.</p>
      */
-    public int getAbsoluteIndex() {
-        return this.absoluteIndex;
-    }
+    int getAbsoluteIndex();
 
     /**
      * Gets the relative index of a stream object (kth element of codec type)
      *
      * @return <p>Relative index.</p>
      */
-    public int getRelativeIndex() {
-        return this.relativeIndex;
-    }
+    int getRelativeIndex();
+
 }

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

@@ -3,7 +3,7 @@ package net.knarcraft.ffmpegconverter.streams;
 /**
  * An object representation of a subtitle stream in a media file
  */
-public class SubtitleStream extends StreamObject {
+public class SubtitleStream extends AbstractStream implements StreamObject {
     final private String language;
     final private String title;
     final private String file;
@@ -22,7 +22,6 @@ public class SubtitleStream extends StreamObject {
      */
     public SubtitleStream(String codecName, int absoluteIndex, int relativeIndex, String language, String title,
                           String file) {
-        this.codecType = "subtitle";
         this.codecName = codecName;
         this.absoluteIndex = absoluteIndex;
         this.language = language;

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

@@ -3,7 +3,7 @@ package net.knarcraft.ffmpegconverter.streams;
 /**
  * An object representation of a video stream in a media file
  */
-public class VideoStream extends StreamObject {
+public class VideoStream extends AbstractStream implements StreamObject {
     private final int width;
     private final int height;
 
@@ -17,7 +17,6 @@ public class VideoStream extends StreamObject {
      * @param height        <p>The height of the video stream.</p>
      */
     public VideoStream(String codec, int absoluteIndex, int relativeIndex, int width, int height) {
-        this.codecType = "video";
         this.codecName = codec;
         this.absoluteIndex = absoluteIndex;
         this.relativeIndex = relativeIndex;