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/****************************************************************************** |
/***************************************************************************** |
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* * |
* |
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* This file is part of XviD, a free MPEG-4 video encoder/decoder * |
* XVID MPEG-4 VIDEO CODEC |
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* * |
* - Vector Length Coding tables - |
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* XviD is an implementation of a part of one or more MPEG-4 Video tools * |
* |
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* as specified in ISO/IEC 14496-2 standard. Those intending to use this * |
* Copyright(C) 2002 Michael Militzer <isibaar@xvid.org> |
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* software module in hardware or software products are advised that its * |
* |
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* use may infringe existing patents or copyrights, and any such use * |
* |
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* would be at such party's own risk. The original developer of this * |
* This program is an implementation of a part of one or more MPEG-4 |
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* software module and his/her company, and subsequent editors and their * |
* Video tools as specified in ISO/IEC 14496-2 standard. Those intending |
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* companies, will have no liability for use of this software or * |
* to use this software module in hardware or software products are |
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* modifications or derivatives thereof. * |
* advised that its use may infringe existing patents or copyrights, and |
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* * |
* any such use would be at such party's own risk. The original |
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* XviD is free software; you can redistribute it and/or modify it * |
* developer of this software module and his/her company, and subsequent |
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* under the terms of the GNU General Public License as published by * |
* editors and their companies, will have no liability for use of this |
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* the Free Software Foundation; either version 2 of the License, or * |
* software or modifications or derivatives thereof. |
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* (at your option) any later version. * |
* |
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* * |
* This program is free software; you can redistribute it and/or modify |
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* XviD is distributed in the hope that it will be useful, but * |
* it under the terms of the GNU General Public License as published by |
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* WITHOUT ANY WARRANTY; without even the implied warranty of * |
* the Free Software Foundation; either version 2 of the License, or |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * |
* (at your option) any later version. |
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* GNU General Public License for more details. * |
* |
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* * |
* This program is distributed in the hope that it will be useful, |
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* You should have received a copy of the GNU General Public License * |
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* along with this program; if not, write to the Free Software * |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * |
* GNU General Public License for more details. |
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* * |
* |
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******************************************************************************/ |
* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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/****************************************************************************** |
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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* * |
* |
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* mbcoding.c * |
* $Id: mbcoding.c,v 1.26 2002-09-08 14:43:04 edgomez Exp $ |
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* * |
* |
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* Copyright (C) 2002 - Michael Militzer <isibaar@xvid.org> * |
****************************************************************************/ |
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* * |
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* For more information visit the XviD homepage: http://www.xvid.org * |
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* * |
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******************************************************************************/ |
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/****************************************************************************** |
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* * |
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* Revision history: * |
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* * |
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* 28.06.2002 added check_resync_marker() * |
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* 14.04.2002 bframe encoding * |
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* 08.03.2002 initial version; isibaar * |
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* * |
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******************************************************************************/ |
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#include <stdlib.h> |
#include <stdlib.h> |
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#include "../portab.h" |
#include "../portab.h" |
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#define ABS(X) (((X)>0)?(X):-(X)) |
#define ABS(X) (((X)>0)?(X):-(X)) |
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#define CLIP(X,A) (X > A) ? (A) : (X) |
#define CLIP(X,A) (X > A) ? (A) : (X) |
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VLC intra_table[524032]; |
/***************************************************************************** |
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VLC inter_table[524032]; |
* Local data |
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****************************************************************************/ |
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VLC DCT3Dintra[4096]; |
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VLC DCT3Dinter[4096]; |
static VLC intra_table[524032]; |
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static VLC inter_table[524032]; |
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static VLC DCT3Dintra[4096]; |
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static VLC DCT3Dinter[4096]; |
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/***************************************************************************** |
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* Functions |
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****************************************************************************/ |
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void |
void |
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init_vlc_tables(void) |
init_vlc_tables(void) |
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vlc[0] = intra_table; |
vlc[0] = intra_table; |
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vlc[1] = inter_table; |
vlc[1] = inter_table; |
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// generate encoding vlc lookup tables |
/* |
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// the lookup table idea is taken from the excellent fame project by Vivien Chapellier |
* Generate encoding vlc lookup tables |
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* the lookup table idea is taken from the excellent fame project |
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* by Vivien Chapellier |
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*/ |
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for (i = 0; i < 4; i++) { |
for (i = 0; i < 4; i++) { |
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intra = i % 2; |
intra = i % 2; |
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last = i / 2; |
last = i / 2; |
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// interlacing |
// interlacing |
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if (frame->global_flags & XVID_INTERLACING) { |
if (frame->global_flags & XVID_INTERLACING) { |
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if (pMB->cbp) { |
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BitstreamPutBit(bs, pMB->field_dct); |
BitstreamPutBit(bs, pMB->field_dct); |
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DEBUG1("codep: field_dct: ", pMB->field_dct); |
DEBUG1("codep: field_dct: ", pMB->field_dct); |
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} |
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// if inter block, write field ME flag |
// if inter block, write field ME flag |
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if (pMB->mode == MODE_INTER || pMB->mode == MODE_INTER_Q) { |
if (pMB->mode == MODE_INTER || pMB->mode == MODE_INTER_Q) { |
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{ |
{ |
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if (frame->coding_type == P_VOP) { |
if (frame->coding_type == P_VOP) { |
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if (pMB->cbp == 0 && pMB->mode == MODE_INTER && pMB->mvs[0].x == 0 && |
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pMB->mvs[0].y == 0) { |
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#ifdef _DISABLE_SKIP |
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/* disable SKIP when Bframes active until some workaround for the B-SKIP problem is found */ |
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BitstreamPutBit(bs, 0); // always coded! |
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#else |
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BitstreamPutBit(bs, 1); // not_coded |
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return; |
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#endif |
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} else |
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BitstreamPutBit(bs, 0); // coded |
BitstreamPutBit(bs, 0); // coded |
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} |
} |
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} |
} |
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void |
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MBSkip(Bitstream * bs) |
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{ |
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BitstreamPutBit(bs, 1); // not coded |
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return; |
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} |
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/*************************************************************** |
/*************************************************************** |
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* bframe encoding start |
* bframe encoding start |
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***************************************************************/ |
***************************************************************/ |