From 3e7a3956733424c04aaa11de1dfb26719eecb26e Mon Sep 17 00:00:00 2001
From: =?utf8?q?David=20=E2=80=98Bombe=E2=80=99=20Roden?=
 <bombe@pterodactylus.net>
Date: Fri, 15 Mar 2013 23:49:59 +0100
Subject: [PATCH] Add external MP3 decoder.

---
 .../sonitus/data/filter/ExternalMp3Decoder.java    | 59 ++++++++++++++++++++++
 1 file changed, 59 insertions(+)
 create mode 100644 src/main/java/net/pterodactylus/sonitus/data/filter/ExternalMp3Decoder.java

diff --git a/src/main/java/net/pterodactylus/sonitus/data/filter/ExternalMp3Decoder.java b/src/main/java/net/pterodactylus/sonitus/data/filter/ExternalMp3Decoder.java
new file mode 100644
index 0000000..ecdee68
--- /dev/null
+++ b/src/main/java/net/pterodactylus/sonitus/data/filter/ExternalMp3Decoder.java
@@ -0,0 +1,59 @@
+/*
+ * Sonitus - ExternalMp3Decoder.java - Copyright © 2013 David Roden
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package net.pterodactylus.sonitus.data.filter;
+
+import static com.google.common.base.Preconditions.*;
+
+import net.pterodactylus.sonitus.data.ConnectException;
+import net.pterodactylus.sonitus.data.Format;
+import net.pterodactylus.sonitus.data.Source;
+
+/**
+ * Basic {@link ExternalFilter} implementation that verifies that the connected
+ * source is MP3-encoded and returns a PCM-encoded stream.
+ *
+ * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
+ */
+public class ExternalMp3Decoder extends ExternalFilter {
+
+	/**
+	 * Creates a new external MP3 decoder.
+	 *
+	 * @param binary
+	 * 		The binary to execute
+	 * @param parameters
+	 * 		The parameters for the binary
+	 */
+	public ExternalMp3Decoder(String binary, Iterable<String> parameters) {
+		super(binary, parameters);
+	}
+
+	@Override
+	public Format format() {
+		return super.format().encoding("PCM");
+	}
+
+	@Override
+	public void connect(Source source) throws ConnectException {
+		checkNotNull(source, "source must not be null");
+		checkState(source.format().encoding().equalsIgnoreCase("MP3"), "source must be MP3-encoded");
+
+		super.connect(source);
+	}
+
+}
-- 
2.7.4