1 files changed, 70 insertions, 0 deletions
diff --git a/app/src/main/java/github/daneren2005/dsub/util/tags/LameHeader.java b/app/src/main/java/github/daneren2005/dsub/util/tags/LameHeader.java
new file mode 100644
index 00000000..720ee87f
--- /dev/null
+++ b/app/src/main/java/github/daneren2005/dsub/util/tags/LameHeader.java
@@ -0,0 +1,70 @@
+/*
+ * Copyright (C) 2013 Adrian Ulrich <adrian@blinkenlights.ch>
+ *
+ * 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 github.daneren2005.dsub.util.tags;
+
+import java.io.IOException;
+import java.io.RandomAccessFile;
+import java.util.HashMap;
+import java.util.Enumeration;
+
+
+public class LameHeader extends Common {
+	
+	public LameHeader() {
+	}
+	
+	public HashMap getTags(RandomAccessFile s) throws IOException {
+		return parseLameHeader(s, 0);
+	}
+	
+	public HashMap parseLameHeader(RandomAccessFile s, long offset) throws IOException {
+		HashMap tags = new HashMap();
+		byte[] chunk = new byte[4];
+		
+		s.seek(offset + 0x24);
+		s.read(chunk);
+		
+		String lameMark = new String(chunk, 0, chunk.length, "ISO-8859-1");
+		
+		if(lameMark.equals("Info") || lameMark.equals("Xing")) {
+			s.seek(offset+0xAB);
+			s.read(chunk);
+			
+			int raw = b2be32(chunk, 0);
+			int gtrk_raw = raw >> 16;     /* first 16 bits are the raw track gain value */
+			int galb_raw = raw & 0xFFFF;  /* the rest is for the album gain value       */
+			
+			float gtrk_val = (float)(gtrk_raw & 0x01FF)/10;
+			float galb_val = (float)(galb_raw & 0x01FF)/10;
+			
+			gtrk_val = ((gtrk_raw&0x0200)!=0 ? -1*gtrk_val : gtrk_val);
+			galb_val = ((galb_raw&0x0200)!=0 ? -1*galb_val : galb_val);
+			
+			if( (gtrk_raw&0xE000) == 0x2000 ) {
+				addTagEntry(tags, "REPLAYGAIN_TRACK_GAIN", gtrk_val+" dB");
+			}
+			if( (gtrk_raw&0xE000) == 0x4000 ) {
+				addTagEntry(tags, "REPLAYGAIN_ALBUM_GAIN", galb_val+" dB");
+			}
+			
+		}
+		
+		return tags;
+	}
+	
+}