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* |
* |
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* Copyright(C) 2002 Michael Militzer <isibaar@xvid.org> |
* Copyright(C) 2002 Michael Militzer <isibaar@xvid.org> |
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* |
* |
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* This file is part of XviD, a free MPEG-4 video encoder/decoder |
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* |
* |
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* This program is an implementation of a part of one or more MPEG-4 |
* XviD is free software; you can redistribute it and/or modify it |
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* Video tools as specified in ISO/IEC 14496-2 standard. Those intending |
* under the terms of the GNU General Public License as published by |
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* to use this software module in hardware or software products are |
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* 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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* developer of this software module and his/her company, and subsequent |
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* editors and their companies, will have no liability for use of this |
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* software or modifications or derivatives thereof. |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation; either version 2 of the License, or |
* the Free Software Foundation; either version 2 of the License, or |
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* (at your option) any later version. |
* (at your option) any later version. |
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* |
* |
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* along with this program; if not, write to the Free Software |
* 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 |
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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* |
* |
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* $Id: mbcoding.c,v 1.27 2002-09-08 15:39:01 edgomez Exp $ |
* Under section 8 of the GNU General Public License, the copyright |
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* holders of XVID explicitly forbid distribution in the following |
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* countries: |
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* |
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* - Japan |
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* - United States of America |
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* |
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* Linking XviD statically or dynamically with other modules is making a |
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* combined work based on XviD. Thus, the terms and conditions of the |
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* GNU General Public License cover the whole combination. |
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* |
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* As a special exception, the copyright holders of XviD give you |
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* permission to link XviD with independent modules that communicate with |
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* XviD solely through the VFW1.1 and DShow interfaces, regardless of the |
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* license terms of these independent modules, and to copy and distribute |
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* the resulting combined work under terms of your choice, provided that |
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* every copy of the combined work is accompanied by a complete copy of |
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* the source code of XviD (the version of XviD used to produce the |
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* combined work), being distributed under the terms of the GNU General |
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* Public License plus this exception. An independent module is a module |
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* which is not derived from or based on XviD. |
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* |
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* Note that people who make modified versions of XviD are not obligated |
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* to grant this special exception for their modified versions; it is |
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* their choice whether to do so. The GNU General Public License gives |
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* permission to release a modified version without this exception; this |
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* exception also makes it possible to release a modified version which |
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* carries forward this exception. |
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* |
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* $Id: mbcoding.c,v 1.33 2002-11-17 00:57:57 edgomez Exp $ |
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* |
* |
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****************************************************************************/ |
****************************************************************************/ |
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* Local data |
* Local data |
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****************************************************************************/ |
****************************************************************************/ |
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static VLC intra_table[524032]; |
/* msvc sp5+pp gets confused if they globals are made static */ |
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static VLC inter_table[524032]; |
VLC intra_table[524032]; |
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VLC inter_table[524032]; |
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static VLC DCT3Dintra[4096]; |
static VLC DCT3Dintra[4096]; |
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static VLC DCT3Dinter[4096]; |
static VLC DCT3Dinter[4096]; |
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int32_t k, l, i, intra, last; |
int32_t k, l, i, intra, last; |
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VLC *vlc[2]; |
VLC *vlc[2]; |
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VLC **coeff_ptr; |
VLC const **coeff_ptr; |
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VLC *vlc1, *vlc2; |
VLC *vlc1, *vlc2; |
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vlc1 = DCT3Dintra; |
vlc1 = DCT3Dintra; |
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coeff_ptr = coeff_vlc[last + 2 * intra]; |
coeff_ptr = coeff_vlc[last + 2 * intra]; |
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for (k = -2047; k < 2048; k++) { // level |
for (k = -2047; k < 2048; k++) { // level |
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int8_t *max_level_ptr = max_level[last + 2 * intra]; |
int8_t const *max_level_ptr = max_level[last + 2 * intra]; |
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int8_t *max_run_ptr = max_run[last + 2 * intra]; |
int8_t const *max_run_ptr = max_run[last + 2 * intra]; |
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for (l = 0; l < 64; l++) { // run |
for (l = 0; l < 64; l++) { // run |
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int32_t level = k; |
int32_t level = k; |
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if (frame->global_flags & XVID_INTERLACING) { |
if (frame->global_flags & XVID_INTERLACING) { |
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if (pMB->cbp) { |
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); |
DPRINTF(DPRINTF_DEBUG, "codep: field_dct: %d", 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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BitstreamPutBit(bs, pMB->field_pred); |
BitstreamPutBit(bs, pMB->field_pred); |
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DEBUG1("codep: field_pred: ", pMB->field_pred); |
DPRINTF(DPRINTF_DEBUG, "codep: field_pred: %d", pMB->field_pred); |
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// write field prediction references |
// write field prediction references |
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if (pMB->field_pred) { |
if (pMB->field_pred) { |
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return; |
return; |
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} |
} |
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/*************************************************************** |
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* bframe encoding start |
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***************************************************************/ |
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/* |
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mbtype |
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0 1b direct(h263) mvdb |
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1 01b interpolate mc+q dbquant, mvdf, mvdb |
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2 001b backward mc+q dbquant, mvdb |
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3 0001b forward mc+q dbquant, mvdf |
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*/ |
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void |
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put_bvop_mbtype(Bitstream * bs, |
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int value) |
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{ |
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switch (value) { |
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case 0: |
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BitstreamPutBit(bs, 1); |
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return; |
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case 1: |
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BitstreamPutBit(bs, 0); |
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BitstreamPutBit(bs, 1); |
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return; |
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case 2: |
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BitstreamPutBit(bs, 0); |
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BitstreamPutBit(bs, 0); |
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BitstreamPutBit(bs, 1); |
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return; |
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case 3: |
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BitstreamPutBit(bs, 0); |
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BitstreamPutBit(bs, 0); |
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BitstreamPutBit(bs, 0); |
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BitstreamPutBit(bs, 1); |
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return; |
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default:; // invalid! |
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} |
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} |
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/* |
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dbquant |
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-2 10b |
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0 0b |
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+2 11b |
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*/ |
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void |
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put_bvop_dbquant(Bitstream * bs, |
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int value) |
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{ |
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switch (value) { |
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case 0: |
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BitstreamPutBit(bs, 0); |
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return; |
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case -2: |
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BitstreamPutBit(bs, 1); |
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BitstreamPutBit(bs, 0); |
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return; |
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case 2: |
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BitstreamPutBit(bs, 1); |
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BitstreamPutBit(bs, 1); |
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return; |
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default:; // invalid |
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} |
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} |
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#if 0 |
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void |
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MBCodingBVOP(const MACROBLOCK * mb, |
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const int16_t qcoeff[6 * 64], |
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const int32_t fcode, |
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const int32_t bcode, |
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Bitstream * bs, |
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Statistics * pStat) |
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{ |
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int i; |
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/* ------------------------------------------------------------------ |
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when a block is skipped it is decoded DIRECT(0,0) |
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hence is interpolated from forward & backward frames |
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------------------------------------------------------------------ */ |
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if (mb->mode == MODE_DIRECT_NONE_MV) { |
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BitstreamPutBit(bs, 1); // skipped |
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return; |
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} |
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BitstreamPutBit(bs, 0); // not skipped |
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if (mb->cbp == 0) { |
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BitstreamPutBit(bs, 1); // cbp == 0 |
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} else { |
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BitstreamPutBit(bs, 0); // cbp == xxx |
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} |
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put_bvop_mbtype(bs, mb->mode); |
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if (mb->cbp) { |
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BitstreamPutBits(bs, mb->cbp, 6); |
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} |
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if (mb->mode != MODE_DIRECT && mb->cbp != 0) { |
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put_bvop_dbquant(bs, 0); // todo: mb->dquant = 0 |
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} |
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if (mb->mode == MODE_INTERPOLATE || mb->mode == MODE_FORWARD) { |
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CodeVector(bs, mb->pmvs[0].x, fcode, pStat); |
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CodeVector(bs, mb->pmvs[0].y, fcode, pStat); |
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} |
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if (mb->mode == MODE_INTERPOLATE || mb->mode == MODE_BACKWARD) { |
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CodeVector(bs, mb->b_pmvs[0].x, bcode, pStat); |
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CodeVector(bs, mb->b_pmvs[0].y, bcode, pStat); |
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} |
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if (mb->mode == MODE_DIRECT) { |
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CodeVector(bs, mb->deltamv.x, 1, pStat); /* fcode is always 1 for delta vector */ |
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CodeVector(bs, mb->deltamv.y, 1, pStat); /* prediction is always (0,0) */ |
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} |
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for (i = 0; i < 6; i++) { |
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if (mb->cbp & (1 << (5 - i))) { |
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CodeCoeff(bs, &qcoeff[i * 64], inter_table, scan_tables[0], 0); |
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} |
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} |
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} |
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#endif |
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/***************************************************************************** |
/***************************************************************************** |
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* decoding stuff starts here |
* decoding stuff starts here |
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****************************************************************************/ |
****************************************************************************/ |
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level = BitstreamGetBits(bs, 8); |
level = BitstreamGetBits(bs, 8); |
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if (level == 0 || level == 128) |
if (level == 0 || level == 128) |
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DEBUG1("Illegal LEVEL for ESCAPE mode 4:", level); |
DPRINTF(DPRINTF_ERROR, "Illegal LEVEL for ESCAPE mode 4: %d", level); |
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return (level >= 128 ? -(256 - level) : level); |
return (level >= 128 ? -(256 - level) : level); |
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} |
} |
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do { |
do { |
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level = get_coeff(bs, &run, &last, 1, 0); |
level = get_coeff(bs, &run, &last, 1, 0); |
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if (run == -1) { |
if (run == -1) { |
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DEBUG("fatal: invalid run"); |
DPRINTF(DPRINTF_DEBUG, "fatal: invalid run"); |
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break; |
break; |
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} |
} |
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coeff += run; |
coeff += run; |
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//DPRINTF(DPRINTF_COEFF,"block[%i] %i %08x", scan[coeff], level, BitstreamShowBits(bs, 32)); |
//DPRINTF(DPRINTF_COEFF,"block[%i] %i %08x", scan[coeff], level, BitstreamShowBits(bs, 32)); |
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if (level < -127 || level > 127) { |
if (level < -127 || level > 127) { |
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DEBUG1("warning: intra_overflow", level); |
DPRINTF(DPRINTF_DEBUG, "warning: intra_overflow: %d", level); |
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} |
} |
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coeff++; |
coeff++; |
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} while (!last); |
} while (!last); |
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do { |
do { |
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level = get_coeff(bs, &run, &last, 0, 0); |
level = get_coeff(bs, &run, &last, 0, 0); |
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if (run == -1) { |
if (run == -1) { |
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DEBUG("fatal: invalid run"); |
DPRINTF(DPRINTF_ERROR, "fatal: invalid run"); |
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break; |
break; |
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} |
} |
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p += run; |
p += run; |
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block[scan[p]] = level; |
block[scan[p]] = level; |
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DPRINTF(DPRINTF_COEFF,"block[%i] %i", scan[p], level); |
DPRINTF(DPRINTF_COEFF,"block[%i] %i", scan[p], level); |
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// DPRINTF(DPRINTF_COEFF,"block[%i] %i %08x", scan[p], level, BitstreamShowBits(bs, 32)); |
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if (level < -127 || level > 127) { |
if (level < -127 || level > 127) { |
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DEBUG1("warning: inter_overflow", level); |
DPRINTF(DPRINTF_DEBUG, "warning: inter_overflow: %d", level); |
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} |
} |
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p++; |
p++; |
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} while (!last); |
} while (!last); |