--- mbtransquant.c 2002/08/09 19:58:41 1.8 +++ mbtransquant.c 2002/11/17 00:51:10 1.19 @@ -1,55 +1,61 @@ - /****************************************************************************** - * * - * This file is part of XviD, a free MPEG-4 video encoder/decoder * - * * - * XviD 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. * - * * - * XviD 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. * - * * - * XviD 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 * - * * - ******************************************************************************/ - - /****************************************************************************** - * * - * mbtransquant.c * - * * - * Copyright (C) 2001 - Peter Ross * - * Copyright (C) 2001 - Michael Militzer * - * * - * For more information visit the XviD homepage: http://www.xvid.org * - * * - ******************************************************************************/ - - /****************************************************************************** - * * - * Revision history: * - * * - * 29.03.2002 interlacing speedup - used transfer strides instead of - * manual field-to-frame conversion - * 26.03.2002 interlacing support - moved transfers outside loops - * 22.12.2001 get_dc_scaler() moved to common.h - * 19.11.2001 introduced coefficient thresholding (Isibaar) * - * 17.11.2001 initial version * - * * - ******************************************************************************/ +/***************************************************************************** + * + * XVID MPEG-4 VIDEO CODEC + * - MacroBlock transfer and quantization - + * + * Copyright(C) 2002-2001 Christoph Lampert + * 2002-2001 Michael Militzer + * 2002-2001 Peter Ross + * 2002 Daniel Smith + * + * This file is part of XviD, a free MPEG-4 video encoder/decoder + * + * XviD 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 + * + * Under section 8 of the GNU General Public License, the copyright + * holders of XVID explicitly forbid distribution in the following + * countries: + * + * - Japan + * - United States of America + * + * Linking XviD statically or dynamically with other modules is making a + * combined work based on XviD. Thus, the terms and conditions of the + * GNU General Public License cover the whole combination. + * + * As a special exception, the copyright holders of XviD give you + * permission to link XviD with independent modules that communicate with + * XviD solely through the VFW1.1 and DShow interfaces, regardless of the + * license terms of these independent modules, and to copy and distribute + * the resulting combined work under terms of your choice, provided that + * every copy of the combined work is accompanied by a complete copy of + * the source code of XviD (the version of XviD used to produce the + * combined work), being distributed under the terms of the GNU General + * Public License plus this exception. An independent module is a module + * which is not derived from or based on XviD. + * + * Note that people who make modified versions of XviD are not obligated + * to grant this special exception for their modified versions; it is + * their choice whether to do so. The GNU General Public License gives + * permission to release a modified version without this exception; this + * exception also makes it possible to release a modified version which + * carries forward this exception. + * + * $Id: mbtransquant.c,v 1.19 2002/11/17 00:51:10 edgomez Exp $ + * + ****************************************************************************/ #include @@ -68,7 +74,7 @@ #define MIN(X, Y) ((X)<(Y)?(X):(Y)) #define MAX(X, Y) ((X)>(Y)?(X):(Y)) -#define TOOSMALL_LIMIT 1 /* skip blocks having a coefficient sum below this value */ +#define TOOSMALL_LIMIT 3 /* skip blocks having a coefficient sum below this value */ /* this isnt pretty, but its better than 20 ifdefs */ @@ -105,7 +111,9 @@ start_timer(); pMB->field_dct = 0; - if ((frame->global_flags & XVID_INTERLACING)) { + if ((frame->global_flags & XVID_INTERLACING) && + (x_pos>0) && (x_posmb_width-1) && + (y_pos>0) && (y_posmb_height-1)) { pMB->field_dct = MBDecideFieldDCT(data); } stop_interlacing_timer(); @@ -183,7 +191,9 @@ start_timer(); pMB->field_dct = 0; - if ((frame->global_flags & XVID_INTERLACING)) { + if ((frame->global_flags & XVID_INTERLACING) && + (x_pos>0) && (x_posmb_width-1) && + (y_pos>0) && (y_posmb_height-1)) { pMB->field_dct = MBDecideFieldDCT(data); } stop_interlacing_timer(); @@ -207,7 +217,8 @@ stop_quant_timer(); } - if (sum >= TOOSMALL_LIMIT) { // skip block ? + if ((sum >= TOOSMALL_LIMIT) || (qcoeff[i*64] != 0) || + (qcoeff[i*64+1] != 0) || (qcoeff[i*64+8] != 0)) { if (pParam->m_quant_type == H263_QUANT) { start_timer(); @@ -295,8 +306,6 @@ MBTransQuantInterBVOP(const MBParam * pParam, FRAMEINFO * frame, MACROBLOCK * pMB, - const uint32_t x_pos, - const uint32_t y_pos, int16_t data[6 * 64], int16_t qcoeff[6 * 64]) { @@ -379,8 +388,8 @@ MBQuantIntra(const MBParam * pParam, FRAMEINFO * frame, MACROBLOCK *pMB, - int16_t qcoeff[6 * 64], - int16_t data[6*64]) + int16_t data[6 * 64], + int16_t qcoeff[6 * 64]) { int i; int iQuant = frame->quant; @@ -613,11 +622,11 @@ } } - if (frame > field) { + if (frame > (field + 350)) { MBFrameToField(data); } - return (frame > field); + return (frame > (field + 350)); }