5 |
* |
* |
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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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* |
* |
21 |
* 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 1.34 2002-11-26 23:44:10 edgomez Exp $ |
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* |
* |
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****************************************************************************/ |
****************************************************************************/ |
56 |
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70 |
* Local data |
* Local data |
71 |
****************************************************************************/ |
****************************************************************************/ |
72 |
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73 |
static VLC intra_table[524032]; |
/* msvc sp5+pp gets confused if they globals are made static */ |
74 |
static VLC inter_table[524032]; |
VLC intra_table[524032]; |
75 |
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VLC inter_table[524032]; |
76 |
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77 |
static VLC DCT3Dintra[4096]; |
static VLC DCT3Dintra[4096]; |
78 |
static VLC DCT3Dinter[4096]; |
static VLC DCT3Dinter[4096]; |
87 |
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88 |
int32_t k, l, i, intra, last; |
int32_t k, l, i, intra, last; |
89 |
VLC *vlc[2]; |
VLC *vlc[2]; |
90 |
VLC **coeff_ptr; |
VLC const **coeff_ptr; |
91 |
VLC *vlc1, *vlc2; |
VLC *vlc1, *vlc2; |
92 |
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93 |
vlc1 = DCT3Dintra; |
vlc1 = DCT3Dintra; |
107 |
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108 |
coeff_ptr = coeff_vlc[last + 2 * intra]; |
coeff_ptr = coeff_vlc[last + 2 * intra]; |
109 |
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110 |
for (k = -2047; k < 2048; k++) { // level |
for (k = -2047; k < 2048; k++) { /* level */ |
111 |
int8_t *max_level_ptr = max_level[last + 2 * intra]; |
int8_t const *max_level_ptr = max_level[last + 2 * intra]; |
112 |
int8_t *max_run_ptr = max_run[last + 2 * intra]; |
int8_t const *max_run_ptr = max_run[last + 2 * intra]; |
113 |
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114 |
for (l = 0; l < 64; l++) { // run |
for (l = 0; l < 64; l++) { /* run */ |
115 |
int32_t level = k; |
int32_t level = k; |
116 |
ptr_t run = l; |
ptr_t run = l; |
117 |
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118 |
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 */ |
119 |
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120 |
vlc[intra]->code = 0; |
vlc[intra]->code = 0; |
121 |
vlc[intra]->len = 0; |
vlc[intra]->len = 0; |
122 |
goto loop_end; |
goto loop_end; |
123 |
} else { |
} else { |
124 |
if (level > 0) // correct level |
if (level > 0) /* correct level */ |
125 |
level -= max_level_ptr[run]; |
level -= max_level_ptr[run]; |
126 |
else |
else |
127 |
level += max_level_ptr[run]; |
level += max_level_ptr[run]; |
134 |
goto loop_end; |
goto loop_end; |
135 |
} |
} |
136 |
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137 |
if (level > 0) // still here? |
if (level > 0) /* still here? */ |
138 |
level += max_level_ptr[run]; // restore level |
level += max_level_ptr[run]; /* restore level */ |
139 |
else |
else |
140 |
level -= max_level_ptr[run]; |
level -= max_level_ptr[run]; |
141 |
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142 |
run -= max_run_ptr[abs(level)] + 1; // and change run |
run -= max_run_ptr[abs(level)] + 1; /* and change run */ |
143 |
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144 |
if ((abs(level) <= max_level_ptr[run]) && |
if ((abs(level) <= max_level_ptr[run]) && |
145 |
(run <= (uint32_t) max_run_ptr[abs(level)])) { |
(run <= (uint32_t) max_run_ptr[abs(level)])) { |
283 |
vlc = table + 64 * 2047 + (v << 6) + j - last; |
vlc = table + 64 * 2047 + (v << 6) + j - last; |
284 |
last = ++j; |
last = ++j; |
285 |
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286 |
// count zeroes |
/* count zeroes */ |
287 |
while (j < 64 && (v = qcoeff[zigzag[j]]) == 0) |
while (j < 64 && (v = qcoeff[zigzag[j]]) == 0) |
288 |
j++; |
j++; |
289 |
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290 |
// write code |
/* write code */ |
291 |
if (j != 64) { |
if (j != 64) { |
292 |
BitstreamPutBits(bs, vlc->code, vlc->len); |
BitstreamPutBits(bs, vlc->code, vlc->len); |
293 |
} else { |
} else { |
315 |
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316 |
cbpy = pMB->cbp >> 2; |
cbpy = pMB->cbp >> 2; |
317 |
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318 |
// write mcbpc |
/* write mcbpc */ |
319 |
if (frame->coding_type == I_VOP) { |
if (frame->coding_type == I_VOP) { |
320 |
mcbpc = ((pMB->mode >> 1) & 3) | ((pMB->cbp & 3) << 2); |
mcbpc = ((pMB->mode >> 1) & 3) | ((pMB->cbp & 3) << 2); |
321 |
BitstreamPutBits(bs, mcbpc_intra_tab[mcbpc].code, |
BitstreamPutBits(bs, mcbpc_intra_tab[mcbpc].code, |
326 |
mcbpc_inter_tab[mcbpc].len); |
mcbpc_inter_tab[mcbpc].len); |
327 |
} |
} |
328 |
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329 |
// ac prediction flag |
/* ac prediction flag */ |
330 |
if (pMB->acpred_directions[0]) |
if (pMB->acpred_directions[0]) |
331 |
BitstreamPutBits(bs, 1, 1); |
BitstreamPutBits(bs, 1, 1); |
332 |
else |
else |
333 |
BitstreamPutBits(bs, 0, 1); |
BitstreamPutBits(bs, 0, 1); |
334 |
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335 |
// write cbpy |
/* write cbpy */ |
336 |
BitstreamPutBits(bs, cbpy_tab[cbpy].code, cbpy_tab[cbpy].len); |
BitstreamPutBits(bs, cbpy_tab[cbpy].code, cbpy_tab[cbpy].len); |
337 |
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338 |
// write dquant |
/* write dquant */ |
339 |
if (pMB->mode == MODE_INTRA_Q) |
if (pMB->mode == MODE_INTRA_Q) |
340 |
BitstreamPutBits(bs, pMB->dquant, 2); |
BitstreamPutBits(bs, pMB->dquant, 2); |
341 |
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342 |
// write interlacing |
/* write interlacing */ |
343 |
if (frame->global_flags & XVID_INTERLACING) { |
if (frame->global_flags & XVID_INTERLACING) { |
344 |
BitstreamPutBit(bs, pMB->field_dct); |
BitstreamPutBit(bs, pMB->field_dct); |
345 |
} |
} |
346 |
// code block coeffs |
/* code block coeffs */ |
347 |
for (i = 0; i < 6; i++) { |
for (i = 0; i < 6; i++) { |
348 |
if (i < 4) |
if (i < 4) |
349 |
BitstreamPutBits(bs, dcy_tab[qcoeff[i * 64 + 0] + 255].code, |
BitstreamPutBits(bs, dcy_tab[qcoeff[i * 64 + 0] + 255].code, |
380 |
mcbpc = (pMB->mode & 7) | ((pMB->cbp & 3) << 3); |
mcbpc = (pMB->mode & 7) | ((pMB->cbp & 3) << 3); |
381 |
cbpy = 15 - (pMB->cbp >> 2); |
cbpy = 15 - (pMB->cbp >> 2); |
382 |
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383 |
// write mcbpc |
/* write mcbpc */ |
384 |
BitstreamPutBits(bs, mcbpc_inter_tab[mcbpc].code, |
BitstreamPutBits(bs, mcbpc_inter_tab[mcbpc].code, |
385 |
mcbpc_inter_tab[mcbpc].len); |
mcbpc_inter_tab[mcbpc].len); |
386 |
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387 |
// write cbpy |
/* write cbpy */ |
388 |
BitstreamPutBits(bs, cbpy_tab[cbpy].code, cbpy_tab[cbpy].len); |
BitstreamPutBits(bs, cbpy_tab[cbpy].code, cbpy_tab[cbpy].len); |
389 |
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390 |
// write dquant |
/* write dquant */ |
391 |
if (pMB->mode == MODE_INTER_Q) |
if (pMB->mode == MODE_INTER_Q) |
392 |
BitstreamPutBits(bs, pMB->dquant, 2); |
BitstreamPutBits(bs, pMB->dquant, 2); |
393 |
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394 |
// interlacing |
/* interlacing */ |
395 |
if (frame->global_flags & XVID_INTERLACING) { |
if (frame->global_flags & XVID_INTERLACING) { |
396 |
if (pMB->cbp) { |
if (pMB->cbp) { |
397 |
BitstreamPutBit(bs, pMB->field_dct); |
BitstreamPutBit(bs, pMB->field_dct); |
398 |
DEBUG1("codep: field_dct: ", pMB->field_dct); |
DPRINTF(DPRINTF_DEBUG, "codep: field_dct: %d", pMB->field_dct); |
399 |
} |
} |
400 |
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// if inter block, write field ME flag |
/* if inter block, write field ME flag */ |
402 |
if (pMB->mode == MODE_INTER || pMB->mode == MODE_INTER_Q) { |
if (pMB->mode == MODE_INTER || pMB->mode == MODE_INTER_Q) { |
403 |
BitstreamPutBit(bs, pMB->field_pred); |
BitstreamPutBit(bs, pMB->field_pred); |
404 |
DEBUG1("codep: field_pred: ", pMB->field_pred); |
DPRINTF(DPRINTF_DEBUG, "codep: field_pred: %d", pMB->field_pred); |
405 |
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406 |
// write field prediction references |
/* write field prediction references */ |
407 |
if (pMB->field_pred) { |
if (pMB->field_pred) { |
408 |
BitstreamPutBit(bs, pMB->field_for_top); |
BitstreamPutBit(bs, pMB->field_for_top); |
409 |
BitstreamPutBit(bs, pMB->field_for_bot); |
BitstreamPutBit(bs, pMB->field_for_bot); |
410 |
} |
} |
411 |
} |
} |
412 |
} |
} |
413 |
// code motion vector(s) |
/* code motion vector(s) */ |
414 |
for (i = 0; i < (pMB->mode == MODE_INTER4V ? 4 : 1); i++) { |
for (i = 0; i < (pMB->mode == MODE_INTER4V ? 4 : 1); i++) { |
415 |
CodeVector(bs, pMB->pmvs[i].x, frame->fcode, pStat); |
CodeVector(bs, pMB->pmvs[i].x, frame->fcode, pStat); |
416 |
CodeVector(bs, pMB->pmvs[i].y, frame->fcode, pStat); |
CodeVector(bs, pMB->pmvs[i].y, frame->fcode, pStat); |
418 |
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419 |
bits = BitstreamPos(bs); |
bits = BitstreamPos(bs); |
420 |
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421 |
// code block coeffs |
/* code block coeffs */ |
422 |
for (i = 0; i < 6; i++) |
for (i = 0; i < 6; i++) |
423 |
if (pMB->cbp & (1 << (5 - i))) |
if (pMB->cbp & (1 << (5 - i))) |
424 |
CodeCoeff(bs, &qcoeff[i * 64], inter_table, scan_tables[0], 0); |
CodeCoeff(bs, &qcoeff[i * 64], inter_table, scan_tables[0], 0); |
441 |
{ |
{ |
442 |
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443 |
if (frame->coding_type == P_VOP) { |
if (frame->coding_type == P_VOP) { |
444 |
BitstreamPutBit(bs, 0); // coded |
BitstreamPutBit(bs, 0); /* coded */ |
445 |
} |
} |
446 |
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447 |
if (pMB->mode == MODE_INTRA || pMB->mode == MODE_INTRA_Q) |
if (pMB->mode == MODE_INTRA || pMB->mode == MODE_INTRA_Q) |
455 |
void |
void |
456 |
MBSkip(Bitstream * bs) |
MBSkip(Bitstream * bs) |
457 |
{ |
{ |
458 |
BitstreamPutBit(bs, 1); // not coded |
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 |
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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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459 |
return; |
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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460 |
} |
} |
461 |
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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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|
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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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|
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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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|
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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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|
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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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|
462 |
/***************************************************************************** |
/***************************************************************************** |
463 |
* decoding stuff starts here |
* decoding stuff starts here |
464 |
****************************************************************************/ |
****************************************************************************/ |
662 |
const VLC *tab; |
const VLC *tab; |
663 |
int32_t level; |
int32_t level; |
664 |
|
|
665 |
if (short_video_header) // inter-VLCs will be used for both intra and inter blocks |
if (short_video_header) /* inter-VLCs will be used for both intra and inter blocks */ |
666 |
intra = 0; |
intra = 0; |
667 |
|
|
668 |
tab = &DCT3D[intra][BitstreamShowBits(bs, 12)]; |
tab = &DCT3D[intra][BitstreamShowBits(bs, 12)]; |
686 |
} |
} |
687 |
|
|
688 |
if (short_video_header) { |
if (short_video_header) { |
689 |
// escape mode 4 - H.263 type, only used if short_video_header = 1 |
/* escape mode 4 - H.263 type, only used if short_video_header = 1 */ |
690 |
*last = BitstreamGetBit(bs); |
*last = BitstreamGetBit(bs); |
691 |
*run = BitstreamGetBits(bs, 6); |
*run = BitstreamGetBits(bs, 6); |
692 |
level = BitstreamGetBits(bs, 8); |
level = BitstreamGetBits(bs, 8); |
693 |
|
|
694 |
if (level == 0 || level == 128) |
if (level == 0 || level == 128) |
695 |
DEBUG1("Illegal LEVEL for ESCAPE mode 4:", level); |
DPRINTF(DPRINTF_ERROR, "Illegal LEVEL for ESCAPE mode 4: %d", level); |
696 |
|
|
697 |
return (level >= 128 ? -(256 - level) : level); |
return (level >= 128 ? -(256 - level) : level); |
698 |
} |
} |
718 |
*last = (tab->code >> 16) & 1; |
*last = (tab->code >> 16) & 1; |
719 |
} |
} |
720 |
|
|
721 |
if (mode < 2) // first escape mode, level is offset |
if (mode < 2) /* first escape mode, level is offset */ |
722 |
level += max_level[*last + (!intra << 1)][*run]; // need to add back the max level |
level += max_level[*last + (!intra << 1)][*run]; /* need to add back the max level */ |
723 |
else if (mode == 2) // second escape mode, run is offset |
else if (mode == 2) /* second escape mode, run is offset */ |
724 |
*run += max_run[*last + (!intra << 1)][level] + 1; |
*run += max_run[*last + (!intra << 1)][level] + 1; |
725 |
|
|
726 |
return BitstreamGetBit(bs) ? -level : level; |
return BitstreamGetBit(bs) ? -level : level; |
727 |
} |
} |
728 |
// third escape mode - fixed length codes |
/* third escape mode - fixed length codes */ |
729 |
BitstreamSkip(bs, 2); |
BitstreamSkip(bs, 2); |
730 |
*last = BitstreamGetBits(bs, 1); |
*last = BitstreamGetBits(bs, 1); |
731 |
*run = BitstreamGetBits(bs, 6); |
*run = BitstreamGetBits(bs, 6); |
732 |
BitstreamSkip(bs, 1); // marker |
BitstreamSkip(bs, 1); /* marker */ |
733 |
level = BitstreamGetBits(bs, 12); |
level = BitstreamGetBits(bs, 12); |
734 |
BitstreamSkip(bs, 1); // marker |
BitstreamSkip(bs, 1); /* marker */ |
735 |
|
|
736 |
return (level & 0x800) ? (level | (-1 ^ 0xfff)) : level; |
return (level & 0x800) ? (level | (-1 ^ 0xfff)) : level; |
737 |
|
|
760 |
do { |
do { |
761 |
level = get_coeff(bs, &run, &last, 1, 0); |
level = get_coeff(bs, &run, &last, 1, 0); |
762 |
if (run == -1) { |
if (run == -1) { |
763 |
DEBUG("fatal: invalid run"); |
DPRINTF(DPRINTF_DEBUG, "fatal: invalid run"); |
764 |
break; |
break; |
765 |
} |
} |
766 |
coeff += run; |
coeff += run; |
767 |
block[scan[coeff]] = level; |
block[scan[coeff]] = level; |
768 |
|
|
769 |
DPRINTF(DPRINTF_COEFF,"block[%i] %i", scan[coeff], level); |
DPRINTF(DPRINTF_COEFF,"block[%i] %i", scan[coeff], level); |
770 |
//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)); */ |
771 |
|
|
772 |
if (level < -127 || level > 127) { |
if (level < -127 || level > 127) { |
773 |
DEBUG1("warning: intra_overflow", level); |
DPRINTF(DPRINTF_DEBUG, "warning: intra_overflow: %d", level); |
774 |
} |
} |
775 |
coeff++; |
coeff++; |
776 |
} while (!last); |
} while (!last); |
792 |
do { |
do { |
793 |
level = get_coeff(bs, &run, &last, 0, 0); |
level = get_coeff(bs, &run, &last, 0, 0); |
794 |
if (run == -1) { |
if (run == -1) { |
795 |
DEBUG("fatal: invalid run"); |
DPRINTF(DPRINTF_ERROR, "fatal: invalid run"); |
796 |
break; |
break; |
797 |
} |
} |
798 |
p += run; |
p += run; |
800 |
block[scan[p]] = level; |
block[scan[p]] = level; |
801 |
|
|
802 |
DPRINTF(DPRINTF_COEFF,"block[%i] %i", scan[p], level); |
DPRINTF(DPRINTF_COEFF,"block[%i] %i", scan[p], level); |
|
// DPRINTF(DPRINTF_COEFF,"block[%i] %i %08x", scan[p], level, BitstreamShowBits(bs, 32)); |
|
803 |
|
|
804 |
if (level < -127 || level > 127) { |
if (level < -127 || level > 127) { |
805 |
DEBUG1("warning: inter_overflow", level); |
DPRINTF(DPRINTF_DEBUG, "warning: inter_overflow: %d", level); |
806 |
} |
} |
807 |
p++; |
p++; |
808 |
} while (!last); |
} while (!last); |