From: David ‘Bombe’ Roden <bombe@pterodactylus.net>
Date: Mon, 30 Jul 2012 10:02:04 +0000 (+0200)
Subject: Add method that tries to automatically detect the audio codec from the filename.
X-Git-Url: https://git.pterodactylus.net/?a=commitdiff_plain;h=99cf6fe8734e6d7b983c7ce6f32ebb4143335cf0;p=demoscenemusic.git

Add method that tries to automatically detect the audio codec from the filename.
---

diff --git a/src/main/java/net/pterodactylus/demoscenemusic/utils/AudioCodecs.java b/src/main/java/net/pterodactylus/demoscenemusic/utils/AudioCodecs.java
index f09e79f..4ec19e8 100644
--- a/src/main/java/net/pterodactylus/demoscenemusic/utils/AudioCodecs.java
+++ b/src/main/java/net/pterodactylus/demoscenemusic/utils/AudioCodecs.java
@@ -41,6 +41,35 @@ public class AudioCodecs {
 	}
 
 	/**
+	 * Tries to automatically detect the audio codec from the filename. In most
+	 * cases this will match the {@link AudioCodecDescription#code} of the codec
+	 * but in some cases other extensions are possible, too. Also, on Amiga
+	 * filenames usually start with the extension (mod files are often named
+	 * “mod.somethingsomethingsomethingdarkside”).
+	 *
+	 * @param filename
+	 *            The name of the file
+	 * @return The audio codec of the file, or {@code null} if no codec could be
+	 *         detected
+	 */
+	public static AudioCodecDescription detect(String filename) {
+		String extension = filename.substring(filename.lastIndexOf('.') + 1).toLowerCase();
+		if (codecDescriptions.containsKey(extension)) {
+			return codecDescriptions.get(extension);
+		}
+		if (extension.equals("ogg")) {
+			return codecDescriptions.get("vorbis");
+		}
+		if (extension.equals("mp4")) {
+			return codecDescriptions.get("aac");
+		}
+		if (extension.equals("xm")) {
+			return codecDescriptions.get("ft2");
+		}
+		return null;
+	}
+
+	/**
 	 * Bundles descriptions for various audio codecs. For simplicity reasons,
 	 * file formats such as MOD, IT, or SID are also treated as audio codecs
 	 * even though they are not.