--- trunk/xvidcore/src/quant/adapt_quant.c 2002/08/04 17:28:50 357 +++ trunk/xvidcore/src/quant/adapt_quant.c 2002/09/21 03:11:36 499 @@ -1,3 +1,37 @@ +/***************************************************************************** + * + * XVID MPEG-4 VIDEO CODEC + * - Adaptive quantization functions - + * + * 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: adapt_quant.c,v 1.10 2002-09-21 03:07:56 suxen_drol Exp $ + * + ****************************************************************************/ + #include "../portab.h" #include "adapt_quant.h" @@ -6,6 +40,10 @@ #define MAX(a,b) (((a) > (b)) ? (a) : (b)) #define RDIFF(a,b) ((int)(a+0.5)-(int)(b+0.5)) +/***************************************************************************** + * Functions + ****************************************************************************/ + int normalize_quantizer_field(float *in, int *out, @@ -65,7 +103,7 @@ { int i, j, k, l; - static float *quant; + float *quant; unsigned char *ptr; float *val; float global = 0.; @@ -84,11 +122,13 @@ const float LowerLimit = 25; - if (!quant) - if (!(quant = (float *) malloc(mb_width * mb_height * sizeof(float)))) - return -1; + if (!(quant = (float *) malloc(mb_width * mb_height * sizeof(float)))) + return(-1); - val = (float *) malloc(mb_width * mb_height * sizeof(float)); + if(!(val = (float *) malloc(mb_width * mb_height * sizeof(float)))) { + free(quant); + return(-1); + } for (k = 0; k < mb_height; k++) { for (l = 0; l < mb_width; l++) // do this for all macroblocks individually @@ -130,7 +170,14 @@ } } } + + i = normalize_quantizer_field(quant, intquant, + mb_width * mb_height, + min_quant, max_quant); + free(val); - return normalize_quantizer_field(quant, intquant, mb_width * mb_height, - min_quant, max_quant); + free(quant); + + return(i); + }