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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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* * |
* - Macro Block coding functions - |
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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 * |
* $Id$ |
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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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* 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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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) |
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48 |
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/***************************************************************************** |
49 |
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* Local data |
50 |
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****************************************************************************/ |
51 |
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52 |
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/* msvc sp5+pp gets confused if they globals are made static */ |
53 |
VLC intra_table[524032]; |
VLC intra_table[524032]; |
54 |
VLC inter_table[524032]; |
VLC inter_table[524032]; |
55 |
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|
56 |
VLC DCT3Dintra[4096]; |
static VLC DCT3Dintra[4096]; |
57 |
VLC DCT3Dinter[4096]; |
static VLC DCT3Dinter[4096]; |
58 |
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59 |
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/***************************************************************************** |
60 |
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* Vector Length Coding Initialization |
61 |
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****************************************************************************/ |
62 |
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63 |
void |
void |
64 |
init_vlc_tables(void) |
init_vlc_tables(void) |
66 |
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67 |
int32_t k, l, i, intra, last; |
int32_t k, l, i, intra, last; |
68 |
VLC *vlc[2]; |
VLC *vlc[2]; |
69 |
VLC **coeff_ptr; |
VLC const **coeff_ptr; |
70 |
VLC *vlc1, *vlc2; |
VLC *vlc1, *vlc2; |
71 |
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72 |
vlc1 = DCT3Dintra; |
vlc1 = DCT3Dintra; |
75 |
vlc[0] = intra_table; |
vlc[0] = intra_table; |
76 |
vlc[1] = inter_table; |
vlc[1] = inter_table; |
77 |
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|
78 |
// generate encoding vlc lookup tables |
/* |
79 |
// the lookup table idea is taken from the excellent fame project by Vivien Chapellier |
* Generate encoding vlc lookup tables |
80 |
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* the lookup table idea is taken from the excellent fame project |
81 |
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* by Vivien Chapellier |
82 |
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*/ |
83 |
for (i = 0; i < 4; i++) { |
for (i = 0; i < 4; i++) { |
84 |
intra = i % 2; |
intra = i % 2; |
85 |
last = i / 2; |
last = i / 2; |
87 |
coeff_ptr = coeff_vlc[last + 2 * intra]; |
coeff_ptr = coeff_vlc[last + 2 * intra]; |
88 |
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|
89 |
for (k = -2047; k < 2048; k++) { // level |
for (k = -2047; k < 2048; k++) { // level |
90 |
int8_t *max_level_ptr = max_level[last + 2 * intra]; |
int8_t const *max_level_ptr = max_level[last + 2 * intra]; |
91 |
int8_t *max_run_ptr = max_run[last + 2 * intra]; |
int8_t const *max_run_ptr = max_run[last + 2 * intra]; |
92 |
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93 |
for (l = 0; l < 64; l++) { // run |
for (l = 0; l < 64; l++) { // run |
94 |
int32_t level = k; |
int32_t level = k; |
95 |
uint32_t run = l; |
ptr_t run = l; |
96 |
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97 |
if ((abs(level) <= max_level_ptr[run]) && (run <= (uint32_t) max_run_ptr[abs(level)])) { // level < max_level and run < max_run |
if ((abs(level) <= max_level_ptr[run]) && (run <= (uint32_t) max_run_ptr[abs(level)])) { // level < max_level and run < max_run |
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181 |
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182 |
} |
} |
183 |
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184 |
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/***************************************************************************** |
185 |
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* Local inlined functions for MB coding |
186 |
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****************************************************************************/ |
187 |
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188 |
static __inline void |
static __inline void |
189 |
CodeVector(Bitstream * bs, |
CodeVector(Bitstream * bs, |
190 |
int32_t value, |
int32_t value, |
240 |
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241 |
} |
} |
242 |
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243 |
static __inline void |
static __inline void |
244 |
CodeCoeff(Bitstream * bs, |
CodeCoeff(Bitstream * bs, |
245 |
const int16_t qcoeff[64], |
const int16_t qcoeff[64], |
278 |
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279 |
} |
} |
280 |
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281 |
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/***************************************************************************** |
282 |
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* Local functions |
283 |
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****************************************************************************/ |
284 |
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285 |
static void |
static void |
286 |
CodeBlockIntra(const FRAMEINFO * frame, |
CodeBlockIntra(const FRAMEINFO * frame, |
372 |
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373 |
// interlacing |
// interlacing |
374 |
if (frame->global_flags & XVID_INTERLACING) { |
if (frame->global_flags & XVID_INTERLACING) { |
375 |
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if (pMB->cbp) { |
376 |
BitstreamPutBit(bs, pMB->field_dct); |
BitstreamPutBit(bs, pMB->field_dct); |
377 |
DEBUG1("codep: field_dct: ", pMB->field_dct); |
DPRINTF(DPRINTF_DEBUG, "codep: field_dct: %d", pMB->field_dct); |
378 |
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} |
379 |
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380 |
// if inter block, write field ME flag |
// if inter block, write field ME flag |
381 |
if (pMB->mode == MODE_INTER || pMB->mode == MODE_INTER_Q) { |
if (pMB->mode == MODE_INTER || pMB->mode == MODE_INTER_Q) { |
382 |
BitstreamPutBit(bs, pMB->field_pred); |
BitstreamPutBit(bs, pMB->field_pred); |
383 |
DEBUG1("codep: field_pred: ", pMB->field_pred); |
DPRINTF(DPRINTF_DEBUG, "codep: field_pred: %d", pMB->field_pred); |
384 |
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385 |
// write field prediction references |
// write field prediction references |
386 |
if (pMB->field_pred) { |
if (pMB->field_pred) { |
407 |
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408 |
} |
} |
409 |
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410 |
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/***************************************************************************** |
411 |
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* Macro Block bitstream encoding functions |
412 |
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****************************************************************************/ |
413 |
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414 |
void |
void |
415 |
MBCoding(const FRAMEINFO * frame, |
MBCoding(const FRAMEINFO * frame, |
419 |
Statistics * pStat) |
Statistics * pStat) |
420 |
{ |
{ |
421 |
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int intra = (pMB->mode == MODE_INTRA || pMB->mode == MODE_INTRA_Q); |
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422 |
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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BitstreamPutBit(bs, 1); // not_coded |
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return; |
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} else |
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423 |
BitstreamPutBit(bs, 0); // coded |
BitstreamPutBit(bs, 0); // coded |
424 |
} |
} |
425 |
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426 |
if (intra) |
if (pMB->mode == MODE_INTRA || pMB->mode == MODE_INTRA_Q) |
427 |
CodeBlockIntra(frame, pMB, qcoeff, bs, pStat); |
CodeBlockIntra(frame, pMB, qcoeff, bs, pStat); |
428 |
else |
else |
429 |
CodeBlockInter(frame, pMB, qcoeff, bs, pStat); |
CodeBlockInter(frame, pMB, qcoeff, bs, pStat); |
430 |
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431 |
} |
} |
432 |
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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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433 |
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434 |
void |
void |
435 |
put_bvop_mbtype(Bitstream * bs, |
MBSkip(Bitstream * bs) |
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int value) |
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436 |
{ |
{ |
437 |
switch (value) { |
BitstreamPutBit(bs, 1); // not coded |
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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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438 |
return; |
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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439 |
} |
} |
440 |
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441 |
} |
/***************************************************************************** |
442 |
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* decoding stuff starts here |
443 |
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****************************************************************************/ |
444 |
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445 |
/* |
/* |
446 |
dbquant |
* For IVOP addbits == 0 |
447 |
-2 10b |
* For PVOP addbits == fcode - 1 |
448 |
0 0b |
* For BVOP addbits == max(fcode,bcode) - 1 |
449 |
+2 11b |
* returns true or false |
450 |
*/ |
*/ |
451 |
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452 |
void |
int |
453 |
put_bvop_dbquant(Bitstream * bs, |
check_resync_marker(Bitstream * bs, int addbits) |
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int value) |
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454 |
{ |
{ |
455 |
switch (value) { |
uint32_t nbits; |
456 |
case 0: |
uint32_t code; |
457 |
BitstreamPutBit(bs, 0); |
uint32_t nbitsresyncmarker = NUMBITS_VP_RESYNC_MARKER + addbits; |
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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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458 |
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459 |
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nbits = BitstreamNumBitsToByteAlign(bs); |
460 |
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code = BitstreamShowBits(bs, nbits); |
461 |
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462 |
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if (code == (((uint32_t)1 << (nbits - 1)) - 1)) |
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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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463 |
{ |
{ |
464 |
int i; |
return BitstreamShowBitsFromByteAlign(bs, nbitsresyncmarker) == RESYNC_MARKER; |
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/* ------------------------------------------------------------------ |
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when a block is skipped it is decoded DIRECT(0,) |
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hence are interpolated from forward & backward frames |
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------------------------------------------------------------------ */ |
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if (mb->mode == 5) { |
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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); |
|
465 |
} |
} |
466 |
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467 |
if (mb->mode != MODE_DIRECT && mb->cbp != 0) { |
return 0; |
|
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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// TODO: direct |
|
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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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} |
|
468 |
} |
} |
469 |
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470 |
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471 |
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/*************************************************************** |
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* decoding stuff starts here * |
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***************************************************************/ |
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|
472 |
int |
int |
473 |
get_mcbpc_intra(Bitstream * bs) |
get_mcbpc_intra(Bitstream * bs) |
474 |
{ |
{ |
475 |
|
|
476 |
uint32_t index; |
uint32_t index; |
477 |
|
|
478 |
while ((index = BitstreamShowBits(bs, 9)) == 1) |
index = BitstreamShowBits(bs, 9); |
|
BitstreamSkip(bs, 9); |
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|
|
479 |
index >>= 3; |
index >>= 3; |
480 |
|
|
481 |
BitstreamSkip(bs, mcbpc_intra_table[index].len); |
BitstreamSkip(bs, mcbpc_intra_table[index].len); |
490 |
|
|
491 |
uint32_t index; |
uint32_t index; |
492 |
|
|
493 |
while ((index = CLIP(BitstreamShowBits(bs, 9), 256)) == 1) |
index = CLIP(BitstreamShowBits(bs, 9), 256); |
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BitstreamSkip(bs, 9); |
|
494 |
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|
495 |
BitstreamSkip(bs, mcbpc_inter_table[index].len); |
BitstreamSkip(bs, mcbpc_inter_table[index].len); |
496 |
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625 |
|
|
626 |
} |
} |
627 |
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628 |
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/***************************************************************************** |
629 |
|
* Local inlined function to "decode" written vlc codes |
630 |
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****************************************************************************/ |
631 |
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632 |
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static __inline int |
633 |
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get_coeff(Bitstream * bs, |
634 |
|
int *run, |
635 |
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int *last, |
636 |
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int intra, |
637 |
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int short_video_header) |
638 |
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{ |
639 |
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|
640 |
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uint32_t mode; |
641 |
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const VLC *tab; |
642 |
|
int32_t level; |
643 |
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644 |
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if (short_video_header) // inter-VLCs will be used for both intra and inter blocks |
645 |
|
intra = 0; |
646 |
|
|
647 |
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tab = &DCT3D[intra][BitstreamShowBits(bs, 12)]; |
648 |
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|
649 |
|
if (tab->code == -1) |
650 |
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goto error; |
651 |
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652 |
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BitstreamSkip(bs, tab->len); |
653 |
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654 |
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if (tab->code != ESCAPE) { |
655 |
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if (!intra) { |
656 |
|
*run = (tab->code >> 4) & 255; |
657 |
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level = tab->code & 15; |
658 |
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*last = (tab->code >> 12) & 1; |
659 |
|
} else { |
660 |
|
*run = (tab->code >> 8) & 255; |
661 |
|
level = tab->code & 255; |
662 |
|
*last = (tab->code >> 16) & 1; |
663 |
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} |
664 |
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return BitstreamGetBit(bs) ? -level : level; |
665 |
|
} |
666 |
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667 |
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if (short_video_header) { |
668 |
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// escape mode 4 - H.263 type, only used if short_video_header = 1 |
669 |
|
*last = BitstreamGetBit(bs); |
670 |
|
*run = BitstreamGetBits(bs, 6); |
671 |
|
level = BitstreamGetBits(bs, 8); |
672 |
|
|
673 |
|
if (level == 0 || level == 128) |
674 |
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DPRINTF(DPRINTF_ERROR, "Illegal LEVEL for ESCAPE mode 4: %d", level); |
675 |
|
|
676 |
|
return (level >= 128 ? -(256 - level) : level); |
677 |
|
} |
678 |
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|
679 |
|
mode = BitstreamShowBits(bs, 2); |
680 |
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681 |
|
if (mode < 3) { |
682 |
|
BitstreamSkip(bs, (mode == 2) ? 2 : 1); |
683 |
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684 |
|
tab = &DCT3D[intra][BitstreamShowBits(bs, 12)]; |
685 |
|
if (tab->code == -1) |
686 |
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goto error; |
687 |
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|
688 |
|
BitstreamSkip(bs, tab->len); |
689 |
|
|
690 |
|
if (!intra) { |
691 |
|
*run = (tab->code >> 4) & 255; |
692 |
|
level = tab->code & 15; |
693 |
|
*last = (tab->code >> 12) & 1; |
694 |
|
} else { |
695 |
|
*run = (tab->code >> 8) & 255; |
696 |
|
level = tab->code & 255; |
697 |
|
*last = (tab->code >> 16) & 1; |
698 |
|
} |
699 |
|
|
700 |
|
if (mode < 2) // first escape mode, level is offset |
701 |
|
level += max_level[*last + (!intra << 1)][*run]; // need to add back the max level |
702 |
|
else if (mode == 2) // second escape mode, run is offset |
703 |
|
*run += max_run[*last + (!intra << 1)][level] + 1; |
704 |
|
|
705 |
|
return BitstreamGetBit(bs) ? -level : level; |
706 |
|
} |
707 |
|
// third escape mode - fixed length codes |
708 |
|
BitstreamSkip(bs, 2); |
709 |
|
*last = BitstreamGetBits(bs, 1); |
710 |
|
*run = BitstreamGetBits(bs, 6); |
711 |
|
BitstreamSkip(bs, 1); // marker |
712 |
|
level = BitstreamGetBits(bs, 12); |
713 |
|
BitstreamSkip(bs, 1); // marker |
714 |
|
|
715 |
|
return (level & 0x800) ? (level | (-1 ^ 0xfff)) : level; |
716 |
|
|
717 |
|
error: |
718 |
|
*run = VLC_ERROR; |
719 |
|
return 0; |
720 |
|
|
721 |
|
} |
722 |
|
|
723 |
|
/***************************************************************************** |
724 |
|
* MB reading functions |
725 |
|
****************************************************************************/ |
726 |
|
|
727 |
void |
void |
728 |
get_intra_block(Bitstream * bs, |
get_intra_block(Bitstream * bs, |
729 |
int16_t * block, |
int16_t * block, |
739 |
do { |
do { |
740 |
level = get_coeff(bs, &run, &last, 1, 0); |
level = get_coeff(bs, &run, &last, 1, 0); |
741 |
if (run == -1) { |
if (run == -1) { |
742 |
DEBUG("fatal: invalid run"); |
DPRINTF(DPRINTF_DEBUG, "fatal: invalid run"); |
743 |
break; |
break; |
744 |
} |
} |
745 |
coeff += run; |
coeff += run; |
746 |
block[scan[coeff]] = level; |
block[scan[coeff]] = level; |
747 |
|
|
748 |
|
DPRINTF(DPRINTF_COEFF,"block[%i] %i", scan[coeff], level); |
749 |
|
//DPRINTF(DPRINTF_COEFF,"block[%i] %i %08x", scan[coeff], level, BitstreamShowBits(bs, 32)); |
750 |
|
|
751 |
if (level < -127 || level > 127) { |
if (level < -127 || level > 127) { |
752 |
DEBUG1("warning: intra_overflow", level); |
DPRINTF(DPRINTF_DEBUG, "warning: intra_overflow: %d", level); |
753 |
} |
} |
754 |
coeff++; |
coeff++; |
755 |
} while (!last); |
} while (!last); |
771 |
do { |
do { |
772 |
level = get_coeff(bs, &run, &last, 0, 0); |
level = get_coeff(bs, &run, &last, 0, 0); |
773 |
if (run == -1) { |
if (run == -1) { |
774 |
DEBUG("fatal: invalid run"); |
DPRINTF(DPRINTF_ERROR, "fatal: invalid run"); |
775 |
break; |
break; |
776 |
} |
} |
777 |
p += run; |
p += run; |
778 |
|
|
779 |
block[scan[p]] = level; |
block[scan[p]] = level; |
780 |
|
|
781 |
|
DPRINTF(DPRINTF_COEFF,"block[%i] %i", scan[p], level); |
782 |
|
|
783 |
if (level < -127 || level > 127) { |
if (level < -127 || level > 127) { |
784 |
DEBUG1("warning: inter_overflow", level); |
DPRINTF(DPRINTF_DEBUG, "warning: inter_overflow: %d", level); |
785 |
} |
} |
786 |
p++; |
p++; |
787 |
} while (!last); |
} while (!last); |