Add supported channels data to AudioCodec

The vorbis codec only supports stereo with ffmpeg.

Author: brarcher

app/src/main/java/protect/videotranscoder/media/AudioCodec.java

@@ -2,21 +2,27 @@
 
 import android.support.annotation.Nullable;
 
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.List;
+
 /**
  * List of audio codecs which the application may support
  */
 public enum AudioCodec
 {
-    AAC("aac"),
-    MP3("mp3"),
-    VORBIS("vorbis"),
+    AAC("aac", Arrays.asList("1", "2")),
+    MP3("mp3", Arrays.asList("1", "2")),
+    VORBIS("vorbis", Collections.singletonList("2")),
     ;
 
     public final String ffmpegName;
+    public final List<String> supportedChannels;
 
-    AudioCodec(String ffmpegName)
+    AudioCodec(String ffmpegName, List<String> supportedChannels)
     {
         this.ffmpegName = ffmpegName;
+        this.supportedChannels = Collections.unmodifiableList(supportedChannels);
     }
 
     @Nullable