Added ac3dec 0.6.1 with native ALSA driver.

ac3dec/libac3/debug.c

@@ -0,0 +1,58 @@
+/*
+ *
+ * debug.c
+ *
+ *	Copyright (C) Aaron Holtzman - May 1999
+ *
+ *  This file is part of ac3dec, a free Dolby AC-3 stream decoder.
+ *	
+ *  ac3dec 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 2, or (at your option)
+ *  any later version.
+ *   
+ *  ac3dec 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 GNU Make; see the file COPYING.  If not, write to
+ *  the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. 
+ *
+ */
+
+#include <stdlib.h>
+#include "debug.h"
+
+static int debug_level = -1;
+
+// Determine is debug output is required.
+// We could potentially have multiple levels of debug info
+int debug_is_on(void)
+{
+	char *env_var;
+	
+	if(debug_level < 0)
+	{
+	  env_var = getenv("AC3_DEBUG");
+
+		if (env_var)
+		{
+			debug_level = 1;
+		}
+		else
+			debug_level = 0;
+	}
+	
+	return debug_level;
+}
+
+//If you don't have gcc, then ya don't get debug output
+#ifndef __GNUC__
+void dprintf(char fmt[],...)
+{
+	int foo = 0;
+}
+#endif
+