--- trunk/xvidcore/src/quant/quant_mpeg4.c	2002/06/12 20:38:41	195
+++ trunk/xvidcore/src/quant/quant_mpeg4.c	2002/09/07 11:21:10	442
@@ -1,64 +1,64 @@
-/**************************************************************************
+/*****************************************************************************
  *
- *    XVID MPEG-4 VIDEO CODEC
- *    mpeg-4 quantization/dequantization
+ *  XVID MPEG-4 VIDEO CODEC
+ *  - Mpeg4 quantization/dequantization functions -
  *
- *    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., 675 Mass Ave, Cambridge, MA 02139, USA.
- *
- *************************************************************************/
-
-/**************************************************************************
- *
- *    History:
- *
- *	26.01.2002    fixed  quant4_intra dcscalar signed/unsigned error
- *  20.01.2002    increased accuracy of >> divide
- *  26.12.2001    divide-by-multiplication optimization
- *  22.12.2001    [-127,127] clamping removed; minor tweaks
- *	19.11.2001    inital version <pross@cs.rmit.edu.au>
+ *  Copyright(C) 2002 Peter Ross
  *
- *************************************************************************/
-
+ *  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_mpeg4.c,v 1.4 2002-09-07 11:21:10 edgomez Exp $
+ *
+ ****************************************************************************/
 
 #include "quant_mpeg4.h"
 #include "quant_matrix.h"
 
-// function pointers
+/*****************************************************************************
+ * Function pointers
+ ****************************************************************************/
+
 quant_intraFuncPtr quant4_intra;
 quant_intraFuncPtr dequant4_intra;
 dequant_interFuncPtr dequant4_inter;
 quant_interFuncPtr quant4_inter;
 
 
+/*****************************************************************************
+ * Local data
+ ****************************************************************************/
+
 #define DIV_DIV(A,B)    ( (A) > 0 ? ((A)+((B)>>1))/(B) : ((A)-((B)>>1))/(B) )
 #define SIGN(A)  ((A)>0?1:-1)
 #define VM18P    3
 #define VM18Q    4
 
 
-// divide-by-multiply table
-// need 17 bit shift (16 causes slight errors when q > 19)
+/*
+ * divide-by-multiply table
+ * need 17 bit shift (16 causes slight errors when q > 19)
+ */
 
 #define SCALEBITS    17
 #define FIX(X)        ((1UL << SCALEBITS) / (X) + 1)
@@ -74,6 +74,10 @@
 	FIX(56), FIX(58), FIX(60), FIX(62)
 };
 
+/*****************************************************************************
+ * Functions
+ ****************************************************************************/
+
 /*    quantize intra-block
 
     // const int32_t quantd = DIV_DIV(VM18P*quant, VM18Q);