--- quant_matrix.c	2002/06/12 20:38:40	1.5
+++ quant_matrix.c	2002/09/22 18:33:31	1.9
@@ -1,7 +1,46 @@
+/*****************************************************************************
+ *
+ *  XVID MPEG-4 VIDEO CODEC
+ *  - Custom matrix quantization functions -
+ *
+ *  Copyright(C) 2002 Michael Militzer
+ *
+ *  This program is an implementation of a part of one or more MPEG-4
+ *  Video tools as specified in ISO/IEC 14496-2 standard.  Those intending
+ *  to use this software module in hardware or software products are
+ *  advised that its use may infringe existing patents or copyrights, and
+ *  any such use would be at such party's own risk.  The original
+ *  developer of this software module and his/her company, and subsequent
+ *  editors and their companies, will have no liability for use of this
+ *  software or modifications or derivatives thereof.
+ *
+ *  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 2 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, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
+ *
+ *  $Id: quant_matrix.c,v 1.9 2002/09/22 18:33:31 h Exp $
+ *
+ ****************************************************************************/
+
 #include "quant_matrix.h"
 
 #define FIX(X) (1 << 16) / (X) + 1
 
+/*****************************************************************************
+ * Local data
+ ****************************************************************************/
+
+/* ToDo : remove all this local to make this module thread safe */
 uint8_t custom_intra_matrix = 0;
 uint8_t custom_inter_matrix = 0;
 
@@ -71,6 +110,10 @@
 	FIX(23), FIX(24), FIX(25), FIX(27), FIX(28), FIX(30), FIX(31), FIX(33)
 };
 
+/*****************************************************************************
+ * Functions
+ ****************************************************************************/
+
 uint8_t
 get_intra_matrix_status(void)
 {
@@ -135,7 +178,7 @@
 		intra_matrix[i] = (int16_t) matrix[i];
 		intra_matrix_fix[i] = FIX(intra_matrix[i]);
 	}
-	return custom_intra_matrix | change;
+	return /*custom_intra_matrix |*/ change;
 }
 
 
@@ -155,5 +198,5 @@
 		inter_matrix[i] = (int16_t) matrix[i];
 		inter_matrix_fix[i] = FIX(inter_matrix[i]);
 	}
-	return custom_inter_matrix | change;
+	return /*custom_inter_matrix |*/ change;
 }