1 |
/****************************************************************************** |
/***************************************************************************** |
2 |
* * |
* |
3 |
* This file is part of XviD, a free MPEG-4 video encoder/decoder * |
* XVID MPEG-4 VIDEO CODEC |
4 |
* * |
* - Vector Length Coding tables - |
5 |
* XviD is an implementation of a part of one or more MPEG-4 Video tools * |
* |
6 |
* as specified in ISO/IEC 14496-2 standard. Those intending to use this * |
* Copyright(C) 2002 Michael Militzer <isibaar@xvid.org> |
7 |
* software module in hardware or software products are advised that its * |
* |
8 |
* use may infringe existing patents or copyrights, and any such use * |
* |
9 |
* 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 |
10 |
* software module and his/her company, and subsequent editors and their * |
* Video tools as specified in ISO/IEC 14496-2 standard. Those intending |
11 |
* companies, will have no liability for use of this software or * |
* to use this software module in hardware or software products are |
12 |
* modifications or derivatives thereof. * |
* advised that its use may infringe existing patents or copyrights, and |
13 |
* * |
* any such use would be at such party's own risk. The original |
14 |
* XviD is free software; you can redistribute it and/or modify it * |
* developer of this software module and his/her company, and subsequent |
15 |
* under the terms of the GNU General Public License as published by * |
* editors and their companies, will have no liability for use of this |
16 |
* the Free Software Foundation; either version 2 of the License, or * |
* software or modifications or derivatives thereof. |
17 |
* (at your option) any later version. * |
* |
18 |
* * |
* This program is free software; you can redistribute it and/or modify |
19 |
* 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 |
20 |
* WITHOUT ANY WARRANTY; without even the implied warranty of * |
* the Free Software Foundation; either version 2 of the License, or |
21 |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * |
* (at your option) any later version. |
22 |
* GNU General Public License for more details. * |
* |
23 |
* * |
* This program is distributed in the hope that it will be useful, |
24 |
* You should have received a copy of the GNU General Public License * |
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
25 |
* along with this program; if not, write to the Free Software * |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
26 |
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * |
* GNU General Public License for more details. |
27 |
* * |
* |
28 |
******************************************************************************/ |
* You should have received a copy of the GNU General Public License |
29 |
|
* along with this program; if not, write to the Free Software |
30 |
/****************************************************************************** |
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
31 |
* * |
* |
32 |
* mbcoding.c * |
* $Id$ |
33 |
* * |
* |
34 |
* Copyright (C) 2002 - Michael Militzer <isibaar@xvid.org> * |
****************************************************************************/ |
|
* * |
|
|
* For more information visit the XviD homepage: http://www.xvid.org * |
|
|
* * |
|
|
******************************************************************************/ |
|
|
|
|
|
/****************************************************************************** |
|
|
* * |
|
|
* Revision history: * |
|
|
* * |
|
|
* 28.06.2002 added check_resync_marker() * |
|
|
* 14.04.2002 bframe encoding * |
|
|
* 08.03.2002 initial version; isibaar * |
|
|
* * |
|
|
******************************************************************************/ |
|
|
|
|
|
|
|
35 |
|
|
36 |
#include <stdlib.h> |
#include <stdlib.h> |
37 |
#include "../portab.h" |
#include "../portab.h" |
45 |
#define ABS(X) (((X)>0)?(X):-(X)) |
#define ABS(X) (((X)>0)?(X):-(X)) |
46 |
#define CLIP(X,A) (X > A) ? (A) : (X) |
#define CLIP(X,A) (X > A) ? (A) : (X) |
47 |
|
|
48 |
VLC intra_table[524032]; |
/***************************************************************************** |
49 |
VLC inter_table[524032]; |
* Local data |
50 |
|
****************************************************************************/ |
51 |
VLC DCT3Dintra[4096]; |
|
52 |
VLC DCT3Dinter[4096]; |
static VLC intra_table[524032]; |
53 |
|
static VLC inter_table[524032]; |
54 |
|
|
55 |
|
static VLC DCT3Dintra[4096]; |
56 |
|
static VLC DCT3Dinter[4096]; |
57 |
|
|
58 |
|
/***************************************************************************** |
59 |
|
* Functions |
60 |
|
****************************************************************************/ |
61 |
|
|
62 |
void |
void |
63 |
init_vlc_tables(void) |
init_vlc_tables(void) |
74 |
vlc[0] = intra_table; |
vlc[0] = intra_table; |
75 |
vlc[1] = inter_table; |
vlc[1] = inter_table; |
76 |
|
|
77 |
// generate encoding vlc lookup tables |
/* |
78 |
// the lookup table idea is taken from the excellent fame project by Vivien Chapellier |
* Generate encoding vlc lookup tables |
79 |
|
* the lookup table idea is taken from the excellent fame project |
80 |
|
* by Vivien Chapellier |
81 |
|
*/ |
82 |
for (i = 0; i < 4; i++) { |
for (i = 0; i < 4; i++) { |
83 |
intra = i % 2; |
intra = i % 2; |
84 |
last = i / 2; |
last = i / 2; |
365 |
|
|
366 |
// interlacing |
// interlacing |
367 |
if (frame->global_flags & XVID_INTERLACING) { |
if (frame->global_flags & XVID_INTERLACING) { |
368 |
|
if (pMB->cbp) { |
369 |
BitstreamPutBit(bs, pMB->field_dct); |
BitstreamPutBit(bs, pMB->field_dct); |
370 |
DEBUG1("codep: field_dct: ", pMB->field_dct); |
DEBUG1("codep: field_dct: ", pMB->field_dct); |
371 |
|
} |
372 |
|
|
373 |
// if inter block, write field ME flag |
// if inter block, write field ME flag |
374 |
if (pMB->mode == MODE_INTER || pMB->mode == MODE_INTER_Q) { |
if (pMB->mode == MODE_INTER || pMB->mode == MODE_INTER_Q) { |
409 |
Statistics * pStat) |
Statistics * pStat) |
410 |
{ |
{ |
411 |
|
|
|
int intra = (pMB->mode == MODE_INTRA || pMB->mode == MODE_INTRA_Q); |
|
|
|
|
412 |
if (frame->coding_type == P_VOP) { |
if (frame->coding_type == P_VOP) { |
|
if (pMB->cbp == 0 && pMB->mode == MODE_INTER && pMB->mvs[0].x == 0 && |
|
|
pMB->mvs[0].y == 0) { |
|
|
BitstreamPutBit(bs, 1); // not_coded |
|
|
return; |
|
|
} else |
|
413 |
BitstreamPutBit(bs, 0); // coded |
BitstreamPutBit(bs, 0); // coded |
414 |
} |
} |
415 |
|
|
416 |
if (intra) |
if (pMB->mode == MODE_INTRA || pMB->mode == MODE_INTRA_Q) |
417 |
CodeBlockIntra(frame, pMB, qcoeff, bs, pStat); |
CodeBlockIntra(frame, pMB, qcoeff, bs, pStat); |
418 |
else |
else |
419 |
CodeBlockInter(frame, pMB, qcoeff, bs, pStat); |
CodeBlockInter(frame, pMB, qcoeff, bs, pStat); |
420 |
|
|
421 |
} |
} |
422 |
|
|
423 |
|
|
424 |
|
void |
425 |
|
MBSkip(Bitstream * bs) |
426 |
|
{ |
427 |
|
BitstreamPutBit(bs, 1); // not coded |
428 |
|
return; |
429 |
|
} |
430 |
|
|
431 |
|
|
432 |
/*************************************************************** |
/*************************************************************** |
433 |
* bframe encoding start |
* bframe encoding start |
434 |
***************************************************************/ |
***************************************************************/ |
517 |
int i; |
int i; |
518 |
|
|
519 |
/* ------------------------------------------------------------------ |
/* ------------------------------------------------------------------ |
520 |
when a block is skipped it is decoded DIRECT(0,) |
when a block is skipped it is decoded DIRECT(0,0) |
521 |
hence are interpolated from forward & backward frames |
hence is interpolated from forward & backward frames |
522 |
------------------------------------------------------------------ */ |
------------------------------------------------------------------ */ |
523 |
|
|
524 |
if (mb->mode == 5) { |
if (mb->mode == MODE_DIRECT_NONE_MV) { |
525 |
BitstreamPutBit(bs, 1); // skipped |
BitstreamPutBit(bs, 1); // skipped |
526 |
return; |
return; |
527 |
} |
} |
555 |
} |
} |
556 |
|
|
557 |
if (mb->mode == MODE_DIRECT) { |
if (mb->mode == MODE_DIRECT) { |
558 |
// TODO: direct |
CodeVector(bs, mb->deltamv.x, 1, pStat); /* fcode is always 1 for delta vector */ |
559 |
|
CodeVector(bs, mb->deltamv.y, 1, pStat); /* prediction is always (0,0) */ |
560 |
} |
} |
561 |
|
|
562 |
for (i = 0; i < 6; i++) { |
for (i = 0; i < 6; i++) { |
573 |
***************************************************************/ |
***************************************************************/ |
574 |
|
|
575 |
|
|
|
void |
|
|
skip_stuffing(Bitstream *bs) |
|
|
{ |
|
|
while (BitstreamShowBits(bs, 9) == 1) |
|
|
BitstreamSkip(bs, 9); |
|
|
} |
|
|
|
|
|
|
|
|
|
|
576 |
// for IVOP addbits == 0 |
// for IVOP addbits == 0 |
577 |
// for PVOP addbits == fcode - 1 |
// for PVOP addbits == fcode - 1 |
578 |
// for BVOP addbits == max(fcode,bcode) - 1 |
// for BVOP addbits == max(fcode,bcode) - 1 |
773 |
} |
} |
774 |
coeff += run; |
coeff += run; |
775 |
block[scan[coeff]] = level; |
block[scan[coeff]] = level; |
776 |
|
|
777 |
|
DPRINTF(DPRINTF_COEFF,"block[%i] %i", scan[coeff], level); |
778 |
|
//DPRINTF(DPRINTF_COEFF,"block[%i] %i %08x", scan[coeff], level, BitstreamShowBits(bs, 32)); |
779 |
|
|
780 |
if (level < -127 || level > 127) { |
if (level < -127 || level > 127) { |
781 |
DEBUG1("warning: intra_overflow", level); |
DEBUG1("warning: intra_overflow", level); |
782 |
} |
} |
806 |
p += run; |
p += run; |
807 |
|
|
808 |
block[scan[p]] = level; |
block[scan[p]] = level; |
809 |
|
|
810 |
|
DPRINTF(DPRINTF_COEFF,"block[%i] %i", scan[p], level); |
811 |
|
// DPRINTF(DPRINTF_COEFF,"block[%i] %i %08x", scan[p], level, BitstreamShowBits(bs, 32)); |
812 |
|
|
813 |
if (level < -127 || level > 127) { |
if (level < -127 || level > 127) { |
814 |
DEBUG1("warning: inter_overflow", level); |
DEBUG1("warning: inter_overflow", level); |
815 |
} |
} |