2 * VC-1 and WMV3 decoder common code
3 * Copyright (c) 2011 Mashiat Sarker Shakkhar
4 * Copyright (c) 2006-2007 Konstantin Shishkov
5 * Partly based on vc9.c (c) 2005 Anonymous, Alex Beregszaszi, Michael Niedermayer
7 * This file is part of Libav.
9 * Libav is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU Lesser General Public
11 * License as published by the Free Software Foundation; either
12 * version 2.1 of the License, or (at your option) any later version.
14 * Libav is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * Lesser General Public License for more details.
19 * You should have received a copy of the GNU Lesser General Public
20 * License along with Libav; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
26 * VC-1 and WMV3 decoder common code
33 #include "mpegvideo.h"
36 #include "msmpeg4data.h"
38 #include "simple_idct.h"
43 /***********************************************************************/
45 * @name VC-1 Bitplane decoding
63 /** @} */ //imode defines
65 /** Decode rows by checking if they are skipped
66 * @param plane Buffer to store decoded bits
67 * @param[in] width Width of this buffer
68 * @param[in] height Height of this buffer
69 * @param[in] stride of this buffer
71 static void decode_rowskip(uint8_t* plane, int width, int height, int stride,
76 for (y = 0; y < height; y++) {
77 if (!get_bits1(gb)) //rowskip
78 memset(plane, 0, width);
80 for (x = 0; x < width; x++)
81 plane[x] = get_bits1(gb);
86 /** Decode columns by checking if they are skipped
87 * @param plane Buffer to store decoded bits
88 * @param[in] width Width of this buffer
89 * @param[in] height Height of this buffer
90 * @param[in] stride of this buffer
91 * @todo FIXME: Optimize
93 static void decode_colskip(uint8_t* plane, int width, int height, int stride,
98 for (x = 0; x < width; x++) {
99 if (!get_bits1(gb)) //colskip
100 for (y = 0; y < height; y++)
103 for (y = 0; y < height; y++)
104 plane[y*stride] = get_bits1(gb);
109 /** Decode a bitplane's bits
110 * @param data bitplane where to store the decode bits
111 * @param[out] raw_flag pointer to the flag indicating that this bitplane is not coded explicitly
112 * @param v VC-1 context for bit reading and logging
114 * @todo FIXME: Optimize
116 static int bitplane_decoding(uint8_t* data, int *raw_flag, VC1Context *v)
118 GetBitContext *gb = &v->s.gb;
120 int imode, x, y, code, offset;
121 uint8_t invert, *planep = data;
122 int width, height, stride;
124 width = v->s.mb_width;
125 height = v->s.mb_height >> v->field_mode;
126 stride = v->s.mb_stride;
127 invert = get_bits1(gb);
128 imode = get_vlc2(gb, ff_vc1_imode_vlc.table, VC1_IMODE_VLC_BITS, 1);
133 //Data is actually read in the MB layer (same for all tests == "raw")
134 *raw_flag = 1; //invert ignored
138 if ((height * width) & 1) {
139 *planep++ = get_bits1(gb);
144 // decode bitplane as one long line
145 for (y = offset; y < height * width; y += 2) {
146 code = get_vlc2(gb, ff_vc1_norm2_vlc.table, VC1_NORM2_VLC_BITS, 1);
147 *planep++ = code & 1;
149 if (offset == width) {
151 planep += stride - width;
153 *planep++ = code >> 1;
155 if (offset == width) {
157 planep += stride - width;
163 if (!(height % 3) && (width % 3)) { // use 2x3 decoding
164 for (y = 0; y < height; y += 3) {
165 for (x = width & 1; x < width; x += 2) {
166 code = get_vlc2(gb, ff_vc1_norm6_vlc.table, VC1_NORM6_VLC_BITS, 2);
168 av_log(v->s.avctx, AV_LOG_DEBUG, "invalid NORM-6 VLC\n");
171 planep[x + 0] = (code >> 0) & 1;
172 planep[x + 1] = (code >> 1) & 1;
173 planep[x + 0 + stride] = (code >> 2) & 1;
174 planep[x + 1 + stride] = (code >> 3) & 1;
175 planep[x + 0 + stride * 2] = (code >> 4) & 1;
176 planep[x + 1 + stride * 2] = (code >> 5) & 1;
178 planep += stride * 3;
181 decode_colskip(data, 1, height, stride, &v->s.gb);
183 planep += (height & 1) * stride;
184 for (y = height & 1; y < height; y += 2) {
185 for (x = width % 3; x < width; x += 3) {
186 code = get_vlc2(gb, ff_vc1_norm6_vlc.table, VC1_NORM6_VLC_BITS, 2);
188 av_log(v->s.avctx, AV_LOG_DEBUG, "invalid NORM-6 VLC\n");
191 planep[x + 0] = (code >> 0) & 1;
192 planep[x + 1] = (code >> 1) & 1;
193 planep[x + 2] = (code >> 2) & 1;
194 planep[x + 0 + stride] = (code >> 3) & 1;
195 planep[x + 1 + stride] = (code >> 4) & 1;
196 planep[x + 2 + stride] = (code >> 5) & 1;
198 planep += stride * 2;
202 decode_colskip(data, x, height, stride, &v->s.gb);
204 decode_rowskip(data + x, width - x, 1, stride, &v->s.gb);
208 decode_rowskip(data, width, height, stride, &v->s.gb);
211 decode_colskip(data, width, height, stride, &v->s.gb);
217 /* Applying diff operator */
218 if (imode == IMODE_DIFF2 || imode == IMODE_DIFF6) {
221 for (x = 1; x < width; x++)
222 planep[x] ^= planep[x-1];
223 for (y = 1; y < height; y++) {
225 planep[0] ^= planep[-stride];
226 for (x = 1; x < width; x++) {
227 if (planep[x-1] != planep[x-stride]) planep[x] ^= invert;
228 else planep[x] ^= planep[x-1];
233 for (x = 0; x < stride * height; x++)
234 planep[x] = !planep[x]; //FIXME stride
236 return (imode << 1) + invert;
239 /** @} */ //Bitplane group
241 /***********************************************************************/
242 /** VOP Dquant decoding
243 * @param v VC-1 Context
245 static int vop_dquant_decoding(VC1Context *v)
247 GetBitContext *gb = &v->s.gb;
251 if (v->dquant == 2) {
252 pqdiff = get_bits(gb, 3);
254 v->altpq = get_bits(gb, 5);
256 v->altpq = v->pq + pqdiff + 1;
258 v->dquantfrm = get_bits1(gb);
260 v->dqprofile = get_bits(gb, 2);
261 switch (v->dqprofile) {
262 case DQPROFILE_SINGLE_EDGE:
263 case DQPROFILE_DOUBLE_EDGES:
264 v->dqsbedge = get_bits(gb, 2);
266 case DQPROFILE_ALL_MBS:
267 v->dqbilevel = get_bits1(gb);
273 if (v->dqbilevel || v->dqprofile != DQPROFILE_ALL_MBS) {
274 pqdiff = get_bits(gb, 3);
276 v->altpq = get_bits(gb, 5);
278 v->altpq = v->pq + pqdiff + 1;
285 static int decode_sequence_header_adv(VC1Context *v, GetBitContext *gb);
288 * Decode Simple/Main Profiles sequence header
289 * @see Figure 7-8, p16-17
290 * @param avctx Codec context
291 * @param gb GetBit context initialized from Codec context extra_data
294 int ff_vc1_decode_sequence_header(AVCodecContext *avctx, VC1Context *v, GetBitContext *gb)
296 av_log(avctx, AV_LOG_DEBUG, "Header: %0X\n", show_bits(gb, 32));
297 v->profile = get_bits(gb, 2);
298 if (v->profile == PROFILE_COMPLEX) {
299 av_log(avctx, AV_LOG_WARNING, "WMV3 Complex Profile is not fully supported\n");
302 if (v->profile == PROFILE_ADVANCED) {
303 v->zz_8x4 = ff_vc1_adv_progressive_8x4_zz;
304 v->zz_4x8 = ff_vc1_adv_progressive_4x8_zz;
305 return decode_sequence_header_adv(v, gb);
307 v->zz_8x4 = ff_wmv2_scantableA;
308 v->zz_4x8 = ff_wmv2_scantableB;
309 v->res_y411 = get_bits1(gb);
310 v->res_sprite = get_bits1(gb);
312 av_log(avctx, AV_LOG_ERROR,
313 "Old interlaced mode is not supported\n");
319 v->frmrtq_postproc = get_bits(gb, 3); //common
320 // (bitrate-32kbps)/64kbps
321 v->bitrtq_postproc = get_bits(gb, 5); //common
322 v->s.loop_filter = get_bits1(gb); //common
323 if (v->s.loop_filter == 1 && v->profile == PROFILE_SIMPLE) {
324 av_log(avctx, AV_LOG_ERROR,
325 "LOOPFILTER shall not be enabled in Simple Profile\n");
327 if (v->s.avctx->skip_loop_filter >= AVDISCARD_ALL)
328 v->s.loop_filter = 0;
330 v->res_x8 = get_bits1(gb); //reserved
331 v->multires = get_bits1(gb);
332 v->res_fasttx = get_bits1(gb);
333 if (!v->res_fasttx) {
334 v->vc1dsp.vc1_inv_trans_8x8 = ff_simple_idct_8;
335 v->vc1dsp.vc1_inv_trans_8x4 = ff_simple_idct84_add;
336 v->vc1dsp.vc1_inv_trans_4x8 = ff_simple_idct48_add;
337 v->vc1dsp.vc1_inv_trans_4x4 = ff_simple_idct44_add;
338 v->vc1dsp.vc1_inv_trans_8x8_dc = ff_simple_idct_add_8;
339 v->vc1dsp.vc1_inv_trans_8x4_dc = ff_simple_idct84_add;
340 v->vc1dsp.vc1_inv_trans_4x8_dc = ff_simple_idct48_add;
341 v->vc1dsp.vc1_inv_trans_4x4_dc = ff_simple_idct44_add;
344 v->fastuvmc = get_bits1(gb); //common
345 if (!v->profile && !v->fastuvmc) {
346 av_log(avctx, AV_LOG_ERROR,
347 "FASTUVMC unavailable in Simple Profile\n");
350 v->extended_mv = get_bits1(gb); //common
351 if (!v->profile && v->extended_mv)
353 av_log(avctx, AV_LOG_ERROR,
354 "Extended MVs unavailable in Simple Profile\n");
357 v->dquant = get_bits(gb, 2); //common
358 v->vstransform = get_bits1(gb); //common
360 v->res_transtab = get_bits1(gb);
363 av_log(avctx, AV_LOG_ERROR,
364 "1 for reserved RES_TRANSTAB is forbidden\n");
368 v->overlap = get_bits1(gb); //common
370 v->s.resync_marker = get_bits1(gb);
371 v->rangered = get_bits1(gb);
372 if (v->rangered && v->profile == PROFILE_SIMPLE) {
373 av_log(avctx, AV_LOG_INFO,
374 "RANGERED should be set to 0 in Simple Profile\n");
377 v->s.max_b_frames = avctx->max_b_frames = get_bits(gb, 3); //common
378 v->quantizer_mode = get_bits(gb, 2); //common
380 v->finterpflag = get_bits1(gb); //common
383 v->s.avctx->width = v->s.avctx->coded_width = get_bits(gb, 11);
384 v->s.avctx->height = v->s.avctx->coded_height = get_bits(gb, 11);
385 skip_bits(gb, 5); //frame rate
386 v->res_x8 = get_bits1(gb);
387 if (get_bits1(gb)) { // something to do with DC VLC selection
388 av_log(avctx, AV_LOG_ERROR, "Unsupported sprite feature\n");
391 skip_bits(gb, 3); //slice code
394 v->res_rtm_flag = get_bits1(gb); //reserved
396 if (!v->res_rtm_flag) {
397 // av_log(avctx, AV_LOG_ERROR,
398 // "0 for reserved RES_RTM_FLAG is forbidden\n");
399 av_log(avctx, AV_LOG_ERROR,
400 "Old WMV3 version detected, some frames may be decoded incorrectly\n");
403 //TODO: figure out what they mean (always 0x402F)
406 av_log(avctx, AV_LOG_DEBUG,
407 "Profile %i:\nfrmrtq_postproc=%i, bitrtq_postproc=%i\n"
408 "LoopFilter=%i, MultiRes=%i, FastUVMC=%i, Extended MV=%i\n"
409 "Rangered=%i, VSTransform=%i, Overlap=%i, SyncMarker=%i\n"
410 "DQuant=%i, Quantizer mode=%i, Max B frames=%i\n",
411 v->profile, v->frmrtq_postproc, v->bitrtq_postproc,
412 v->s.loop_filter, v->multires, v->fastuvmc, v->extended_mv,
413 v->rangered, v->vstransform, v->overlap, v->s.resync_marker,
414 v->dquant, v->quantizer_mode, avctx->max_b_frames);
418 static int decode_sequence_header_adv(VC1Context *v, GetBitContext *gb)
421 v->level = get_bits(gb, 3);
423 av_log(v->s.avctx, AV_LOG_ERROR, "Reserved LEVEL %i\n",v->level);
425 v->chromaformat = get_bits(gb, 2);
426 if (v->chromaformat != 1) {
427 av_log(v->s.avctx, AV_LOG_ERROR,
428 "Only 4:2:0 chroma format supported\n");
433 v->frmrtq_postproc = get_bits(gb, 3); //common
434 // (bitrate-32kbps)/64kbps
435 v->bitrtq_postproc = get_bits(gb, 5); //common
436 v->postprocflag = get_bits1(gb); //common
438 v->s.avctx->coded_width = (get_bits(gb, 12) + 1) << 1;
439 v->s.avctx->coded_height = (get_bits(gb, 12) + 1) << 1;
440 v->s.avctx->width = v->s.avctx->coded_width;
441 v->s.avctx->height = v->s.avctx->coded_height;
442 v->broadcast = get_bits1(gb);
443 v->interlace = get_bits1(gb);
444 v->tfcntrflag = get_bits1(gb);
445 v->finterpflag = get_bits1(gb);
446 skip_bits1(gb); // reserved
448 av_log(v->s.avctx, AV_LOG_DEBUG,
449 "Advanced Profile level %i:\nfrmrtq_postproc=%i, bitrtq_postproc=%i\n"
450 "LoopFilter=%i, ChromaFormat=%i, Pulldown=%i, Interlace: %i\n"
451 "TFCTRflag=%i, FINTERPflag=%i\n",
452 v->level, v->frmrtq_postproc, v->bitrtq_postproc,
453 v->s.loop_filter, v->chromaformat, v->broadcast, v->interlace,
454 v->tfcntrflag, v->finterpflag);
456 v->psf = get_bits1(gb);
457 if (v->psf) { //PsF, 6.1.13
458 av_log(v->s.avctx, AV_LOG_ERROR, "Progressive Segmented Frame mode: not supported (yet)\n");
461 v->s.max_b_frames = v->s.avctx->max_b_frames = 7;
462 if (get_bits1(gb)) { //Display Info - decoding is not affected by it
464 av_log(v->s.avctx, AV_LOG_DEBUG, "Display extended info:\n");
465 w = get_bits(gb, 14) + 1;
466 h = get_bits(gb, 14) + 1;
467 av_log(v->s.avctx, AV_LOG_DEBUG, "Display dimensions: %ix%i\n", w, h);
469 ar = get_bits(gb, 4);
471 v->s.avctx->sample_aspect_ratio = ff_vc1_pixel_aspect[ar];
472 } else if (ar == 15) {
473 w = get_bits(gb, 8) + 1;
474 h = get_bits(gb, 8) + 1;
475 v->s.avctx->sample_aspect_ratio = (AVRational){w, h};
477 av_reduce(&v->s.avctx->sample_aspect_ratio.num,
478 &v->s.avctx->sample_aspect_ratio.den,
479 v->s.avctx->height * w,
480 v->s.avctx->width * h,
483 av_log(v->s.avctx, AV_LOG_DEBUG, "Aspect: %i:%i\n",
484 v->s.avctx->sample_aspect_ratio.num,
485 v->s.avctx->sample_aspect_ratio.den);
487 if (get_bits1(gb)) { //framerate stuff
489 v->s.avctx->time_base.num = 32;
490 v->s.avctx->time_base.den = get_bits(gb, 16) + 1;
493 nr = get_bits(gb, 8);
494 dr = get_bits(gb, 4);
495 if (nr && nr < 8 && dr && dr < 3) {
496 v->s.avctx->time_base.num = ff_vc1_fps_dr[dr - 1];
497 v->s.avctx->time_base.den = ff_vc1_fps_nr[nr - 1] * 1000;
500 if (v->broadcast) { // Pulldown may be present
501 v->s.avctx->time_base.den *= 2;
502 v->s.avctx->ticks_per_frame = 2;
507 v->color_prim = get_bits(gb, 8);
508 v->transfer_char = get_bits(gb, 8);
509 v->matrix_coef = get_bits(gb, 8);
513 v->hrd_param_flag = get_bits1(gb);
514 if (v->hrd_param_flag) {
516 v->hrd_num_leaky_buckets = get_bits(gb, 5);
517 skip_bits(gb, 4); //bitrate exponent
518 skip_bits(gb, 4); //buffer size exponent
519 for (i = 0; i < v->hrd_num_leaky_buckets; i++) {
520 skip_bits(gb, 16); //hrd_rate[n]
521 skip_bits(gb, 16); //hrd_buffer[n]
527 int ff_vc1_decode_entry_point(AVCodecContext *avctx, VC1Context *v, GetBitContext *gb)
531 av_log(avctx, AV_LOG_DEBUG, "Entry point: %08X\n", show_bits_long(gb, 32));
532 v->broken_link = get_bits1(gb);
533 v->closed_entry = get_bits1(gb);
534 v->panscanflag = get_bits1(gb);
535 v->refdist_flag = get_bits1(gb);
536 v->s.loop_filter = get_bits1(gb);
537 v->fastuvmc = get_bits1(gb);
538 v->extended_mv = get_bits1(gb);
539 v->dquant = get_bits(gb, 2);
540 v->vstransform = get_bits1(gb);
541 v->overlap = get_bits1(gb);
542 v->quantizer_mode = get_bits(gb, 2);
544 if (v->hrd_param_flag) {
545 for (i = 0; i < v->hrd_num_leaky_buckets; i++) {
546 skip_bits(gb, 8); //hrd_full[n]
551 avctx->width = avctx->coded_width = (get_bits(gb, 12) + 1) << 1;
552 avctx->height = avctx->coded_height = (get_bits(gb, 12) + 1) << 1;
555 v->extended_dmv = get_bits1(gb);
556 if ((v->range_mapy_flag = get_bits1(gb))) {
557 av_log(avctx, AV_LOG_ERROR, "Luma scaling is not supported, expect wrong picture\n");
558 v->range_mapy = get_bits(gb, 3);
560 if ((v->range_mapuv_flag = get_bits1(gb))) {
561 av_log(avctx, AV_LOG_ERROR, "Chroma scaling is not supported, expect wrong picture\n");
562 v->range_mapuv = get_bits(gb, 3);
565 av_log(avctx, AV_LOG_DEBUG, "Entry point info:\n"
566 "BrokenLink=%i, ClosedEntry=%i, PanscanFlag=%i\n"
567 "RefDist=%i, Postproc=%i, FastUVMC=%i, ExtMV=%i\n"
568 "DQuant=%i, VSTransform=%i, Overlap=%i, Qmode=%i\n",
569 v->broken_link, v->closed_entry, v->panscanflag, v->refdist_flag, v->s.loop_filter,
570 v->fastuvmc, v->extended_mv, v->dquant, v->vstransform, v->overlap, v->quantizer_mode);
575 int ff_vc1_parse_frame_header(VC1Context *v, GetBitContext* gb)
577 int pqindex, lowquant, status;
580 v->interpfrm = get_bits1(gb);
581 skip_bits(gb, 2); //framecnt unused
584 v->rangeredfrm = get_bits1(gb);
585 v->s.pict_type = get_bits1(gb);
586 if (v->s.avctx->max_b_frames) {
587 if (!v->s.pict_type) {
589 v->s.pict_type = AV_PICTURE_TYPE_I;
591 v->s.pict_type = AV_PICTURE_TYPE_B;
593 v->s.pict_type = AV_PICTURE_TYPE_P;
595 v->s.pict_type = v->s.pict_type ? AV_PICTURE_TYPE_P : AV_PICTURE_TYPE_I;
598 if (v->s.pict_type == AV_PICTURE_TYPE_B) {
599 v->bfraction_lut_index = get_vlc2(gb, ff_vc1_bfraction_vlc.table, VC1_BFRACTION_VLC_BITS, 1);
600 v->bfraction = ff_vc1_bfraction_lut[v->bfraction_lut_index];
601 if (v->bfraction == 0) {
602 v->s.pict_type = AV_PICTURE_TYPE_BI;
605 if (v->s.pict_type == AV_PICTURE_TYPE_I || v->s.pict_type == AV_PICTURE_TYPE_BI)
606 skip_bits(gb, 7); // skip buffer fullness
612 if (v->s.pict_type == AV_PICTURE_TYPE_I || v->s.pict_type == AV_PICTURE_TYPE_BI)
614 if (v->s.pict_type == AV_PICTURE_TYPE_P)
617 /* Quantizer stuff */
618 pqindex = get_bits(gb, 5);
621 if (v->quantizer_mode == QUANT_FRAME_IMPLICIT)
622 v->pq = ff_vc1_pquant_table[0][pqindex];
624 v->pq = ff_vc1_pquant_table[1][pqindex];
627 if (v->quantizer_mode == QUANT_FRAME_IMPLICIT)
628 v->pquantizer = pqindex < 9;
629 if (v->quantizer_mode == QUANT_NON_UNIFORM)
631 v->pqindex = pqindex;
633 v->halfpq = get_bits1(gb);
636 if (v->quantizer_mode == QUANT_FRAME_EXPLICIT)
637 v->pquantizer = get_bits1(gb);
639 if (v->extended_mv == 1)
640 v->mvrange = get_unary(gb, 0, 3);
641 v->k_x = v->mvrange + 9 + (v->mvrange >> 1); //k_x can be 9 10 12 13
642 v->k_y = v->mvrange + 8; //k_y can be 8 9 10 11
643 v->range_x = 1 << (v->k_x - 1);
644 v->range_y = 1 << (v->k_y - 1);
645 if (v->multires && v->s.pict_type != AV_PICTURE_TYPE_B)
646 v->respic = get_bits(gb, 2);
648 if (v->res_x8 && (v->s.pict_type == AV_PICTURE_TYPE_I || v->s.pict_type == AV_PICTURE_TYPE_BI)) {
649 v->x8_type = get_bits1(gb);
652 //av_log(v->s.avctx, AV_LOG_INFO, "%c Frame: QP=[%i]%i (+%i/2) %i\n",
653 // (v->s.pict_type == AV_PICTURE_TYPE_P) ? 'P' : ((v->s.pict_type == AV_PICTURE_TYPE_I) ? 'I' : 'B'), pqindex, v->pq, v->halfpq, v->rangeredfrm);
655 if (v->s.pict_type == AV_PICTURE_TYPE_I || v->s.pict_type == AV_PICTURE_TYPE_P)
658 switch (v->s.pict_type) {
659 case AV_PICTURE_TYPE_P:
660 if (v->pq < 5) v->tt_index = 0;
661 else if (v->pq < 13) v->tt_index = 1;
662 else v->tt_index = 2;
664 lowquant = (v->pq > 12) ? 0 : 1;
665 v->mv_mode = ff_vc1_mv_pmode_table[lowquant][get_unary(gb, 1, 4)];
666 if (v->mv_mode == MV_PMODE_INTENSITY_COMP) {
668 v->mv_mode2 = ff_vc1_mv_pmode_table2[lowquant][get_unary(gb, 1, 3)];
669 v->lumscale = get_bits(gb, 6);
670 v->lumshift = get_bits(gb, 6);
672 /* fill lookup tables for intensity compensation */
675 shift = (255 - v->lumshift * 2) << 6;
676 if (v->lumshift > 31)
679 scale = v->lumscale + 32;
680 if (v->lumshift > 31)
681 shift = (v->lumshift - 64) << 6;
683 shift = v->lumshift << 6;
685 for (i = 0; i < 256; i++) {
686 v->luty[i] = av_clip_uint8((scale * i + shift + 32) >> 6);
687 v->lutuv[i] = av_clip_uint8((scale * (i - 128) + 128*64 + 32) >> 6);
690 v->qs_last = v->s.quarter_sample;
691 if (v->mv_mode == MV_PMODE_1MV_HPEL || v->mv_mode == MV_PMODE_1MV_HPEL_BILIN)
692 v->s.quarter_sample = 0;
693 else if (v->mv_mode == MV_PMODE_INTENSITY_COMP) {
694 if (v->mv_mode2 == MV_PMODE_1MV_HPEL || v->mv_mode2 == MV_PMODE_1MV_HPEL_BILIN)
695 v->s.quarter_sample = 0;
697 v->s.quarter_sample = 1;
699 v->s.quarter_sample = 1;
700 v->s.mspel = !(v->mv_mode == MV_PMODE_1MV_HPEL_BILIN || (v->mv_mode == MV_PMODE_INTENSITY_COMP && v->mv_mode2 == MV_PMODE_1MV_HPEL_BILIN));
702 if ((v->mv_mode == MV_PMODE_INTENSITY_COMP &&
703 v->mv_mode2 == MV_PMODE_MIXED_MV) ||
704 v->mv_mode == MV_PMODE_MIXED_MV) {
705 status = bitplane_decoding(v->mv_type_mb_plane, &v->mv_type_is_raw, v);
708 av_log(v->s.avctx, AV_LOG_DEBUG, "MB MV Type plane encoding: "
709 "Imode: %i, Invert: %i\n", status>>1, status&1);
711 v->mv_type_is_raw = 0;
712 memset(v->mv_type_mb_plane, 0, v->s.mb_stride * v->s.mb_height);
714 status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);
717 av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: "
718 "Imode: %i, Invert: %i\n", status>>1, status&1);
720 /* Hopefully this is correct for P frames */
721 v->s.mv_table_index = get_bits(gb, 2); //but using ff_vc1_ tables
722 v->cbpcy_vlc = &ff_vc1_cbpcy_p_vlc[get_bits(gb, 2)];
725 av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");
726 vop_dquant_decoding(v);
729 v->ttfrm = 0; //FIXME Is that so ?
730 if (v->vstransform) {
731 v->ttmbf = get_bits1(gb);
733 v->ttfrm = ff_vc1_ttfrm_to_tt[get_bits(gb, 2)];
740 case AV_PICTURE_TYPE_B:
741 if (v->pq < 5) v->tt_index = 0;
742 else if (v->pq < 13) v->tt_index = 1;
743 else v->tt_index = 2;
745 v->mv_mode = get_bits1(gb) ? MV_PMODE_1MV : MV_PMODE_1MV_HPEL_BILIN;
746 v->qs_last = v->s.quarter_sample;
747 v->s.quarter_sample = (v->mv_mode == MV_PMODE_1MV);
748 v->s.mspel = v->s.quarter_sample;
750 status = bitplane_decoding(v->direct_mb_plane, &v->dmb_is_raw, v);
753 av_log(v->s.avctx, AV_LOG_DEBUG, "MB Direct Type plane encoding: "
754 "Imode: %i, Invert: %i\n", status>>1, status&1);
755 status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);
758 av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: "
759 "Imode: %i, Invert: %i\n", status>>1, status&1);
761 v->s.mv_table_index = get_bits(gb, 2);
762 v->cbpcy_vlc = &ff_vc1_cbpcy_p_vlc[get_bits(gb, 2)];
765 av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");
766 vop_dquant_decoding(v);
770 if (v->vstransform) {
771 v->ttmbf = get_bits1(gb);
773 v->ttfrm = ff_vc1_ttfrm_to_tt[get_bits(gb, 2)];
784 v->c_ac_table_index = decode012(gb);
785 if (v->s.pict_type == AV_PICTURE_TYPE_I || v->s.pict_type == AV_PICTURE_TYPE_BI) {
786 v->y_ac_table_index = decode012(gb);
789 v->s.dc_table_index = get_bits1(gb);
792 if (v->s.pict_type == AV_PICTURE_TYPE_BI) {
793 v->s.pict_type = AV_PICTURE_TYPE_B;
799 /* fill lookup tables for intensity compensation */
800 #define INIT_LUT(lumscale, lumshift, luty, lutuv) \
803 shift = (255 - lumshift * 2) << 6; \
807 scale = lumscale + 32; \
809 shift = (lumshift - 64) << 6; \
811 shift = lumshift << 6; \
813 for (i = 0; i < 256; i++) { \
814 luty[i] = av_clip_uint8((scale * i + shift + 32) >> 6); \
815 lutuv[i] = av_clip_uint8((scale * (i - 128) + 128*64 + 32) >> 6); \
818 int ff_vc1_parse_frame_header_adv(VC1Context *v, GetBitContext* gb)
820 int pqindex, lowquant;
822 int mbmodetab, imvtab, icbptab, twomvbptab, fourmvbptab; /* useful only for debugging */
823 int scale, shift, i; /* for initializing LUT for intensity compensation */
825 v->p_frame_skipped = 0;
826 if (v->second_field) {
827 v->s.pict_type = (v->fptype & 1) ? AV_PICTURE_TYPE_P : AV_PICTURE_TYPE_I;
829 v->s.pict_type = (v->fptype & 1) ? AV_PICTURE_TYPE_BI : AV_PICTURE_TYPE_B;
830 v->s.current_picture_ptr->f.pict_type = v->s.pict_type;
831 if (!v->pic_header_flag)
832 goto parse_common_info;
837 v->fcm = decode012(gb);
839 if (v->fcm == ILACE_FIELD)
841 if (!v->warn_interlaced++)
842 av_log(v->s.avctx, AV_LOG_ERROR,
843 "Interlaced frames/fields support is incomplete\n");
846 v->fcm = PROGRESSIVE;
850 v->fptype = get_bits(gb, 3);
851 v->s.pict_type = (v->fptype & 2) ? AV_PICTURE_TYPE_P : AV_PICTURE_TYPE_I;
852 if (v->fptype & 4) // B-picture
853 v->s.pict_type = (v->fptype & 2) ? AV_PICTURE_TYPE_BI : AV_PICTURE_TYPE_B;
855 switch (get_unary(gb, 0, 4)) {
857 v->s.pict_type = AV_PICTURE_TYPE_P;
860 v->s.pict_type = AV_PICTURE_TYPE_B;
863 v->s.pict_type = AV_PICTURE_TYPE_I;
866 v->s.pict_type = AV_PICTURE_TYPE_BI;
869 v->s.pict_type = AV_PICTURE_TYPE_P; // skipped pic
870 v->p_frame_skipped = 1;
877 if (!v->interlace || v->psf) {
878 v->rptfrm = get_bits(gb, 2);
880 v->tff = get_bits1(gb);
881 v->rff = get_bits1(gb);
884 if (v->panscanflag) {
885 av_log_missing_feature(v->s.avctx, "Pan-scan", 0);
888 if (v->p_frame_skipped) {
891 v->rnd = get_bits1(gb);
893 v->uvsamp = get_bits1(gb);
895 if (!v->refdist_flag)
897 else if ((v->s.pict_type != AV_PICTURE_TYPE_B) && (v->s.pict_type != AV_PICTURE_TYPE_BI)) {
898 v->refdist = get_bits(gb, 2);
900 v->refdist += get_unary(gb, 0, 16);
902 if ((v->s.pict_type == AV_PICTURE_TYPE_B) || (v->s.pict_type == AV_PICTURE_TYPE_BI)) {
903 v->bfraction_lut_index = get_vlc2(gb, ff_vc1_bfraction_vlc.table, VC1_BFRACTION_VLC_BITS, 1);
904 v->bfraction = ff_vc1_bfraction_lut[v->bfraction_lut_index];
905 v->frfd = (v->bfraction * v->refdist) >> 8;
906 v->brfd = v->refdist - v->frfd - 1;
910 goto parse_common_info;
912 if (v->fcm == PROGRESSIVE) {
914 v->interpfrm = get_bits1(gb);
915 if (v->s.pict_type == AV_PICTURE_TYPE_B) {
916 v->bfraction_lut_index = get_vlc2(gb, ff_vc1_bfraction_vlc.table, VC1_BFRACTION_VLC_BITS, 1);
917 v->bfraction = ff_vc1_bfraction_lut[v->bfraction_lut_index];
918 if (v->bfraction == 0) {
919 v->s.pict_type = AV_PICTURE_TYPE_BI; /* XXX: should not happen here */
926 v->cur_field_type = !(v->tff ^ v->second_field);
927 pqindex = get_bits(gb, 5);
930 v->pqindex = pqindex;
931 if (v->quantizer_mode == QUANT_FRAME_IMPLICIT)
932 v->pq = ff_vc1_pquant_table[0][pqindex];
934 v->pq = ff_vc1_pquant_table[1][pqindex];
937 if (v->quantizer_mode == QUANT_FRAME_IMPLICIT)
938 v->pquantizer = pqindex < 9;
939 if (v->quantizer_mode == QUANT_NON_UNIFORM)
941 v->pqindex = pqindex;
943 v->halfpq = get_bits1(gb);
946 if (v->quantizer_mode == QUANT_FRAME_EXPLICIT)
947 v->pquantizer = get_bits1(gb);
949 v->postproc = get_bits(gb, 2);
951 if (v->s.pict_type == AV_PICTURE_TYPE_I || v->s.pict_type == AV_PICTURE_TYPE_P)
957 switch (v->s.pict_type) {
958 case AV_PICTURE_TYPE_I:
959 case AV_PICTURE_TYPE_BI:
960 if (v->fcm == ILACE_FRAME) { //interlace frame picture
961 status = bitplane_decoding(v->fieldtx_plane, &v->fieldtx_is_raw, v);
964 av_log(v->s.avctx, AV_LOG_DEBUG, "FIELDTX plane encoding: "
965 "Imode: %i, Invert: %i\n", status>>1, status&1);
967 status = bitplane_decoding(v->acpred_plane, &v->acpred_is_raw, v);
970 av_log(v->s.avctx, AV_LOG_DEBUG, "ACPRED plane encoding: "
971 "Imode: %i, Invert: %i\n", status>>1, status&1);
972 v->condover = CONDOVER_NONE;
973 if (v->overlap && v->pq <= 8) {
974 v->condover = decode012(gb);
975 if (v->condover == CONDOVER_SELECT) {
976 status = bitplane_decoding(v->over_flags_plane, &v->overflg_is_raw, v);
979 av_log(v->s.avctx, AV_LOG_DEBUG, "CONDOVER plane encoding: "
980 "Imode: %i, Invert: %i\n", status>>1, status&1);
984 case AV_PICTURE_TYPE_P:
986 v->numref = get_bits1(gb);
988 v->reffield = get_bits1(gb);
989 v->ref_field_type[0] = v->reffield ^ !v->cur_field_type;
993 v->mvrange = get_unary(gb, 0, 3);
998 v->dmvrange = get_unary(gb, 0, 3);
1001 if (v->fcm == ILACE_FRAME) { // interlaced frame picture
1002 v->fourmvswitch = get_bits1(gb);
1003 v->intcomp = get_bits1(gb);
1005 v->lumscale = get_bits(gb, 6);
1006 v->lumshift = get_bits(gb, 6);
1007 INIT_LUT(v->lumscale, v->lumshift, v->luty, v->lutuv);
1009 status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);
1010 av_log(v->s.avctx, AV_LOG_DEBUG, "SKIPMB plane encoding: "
1011 "Imode: %i, Invert: %i\n", status>>1, status&1);
1012 mbmodetab = get_bits(gb, 2);
1013 if (v->fourmvswitch)
1014 v->mbmode_vlc = &ff_vc1_intfr_4mv_mbmode_vlc[mbmodetab];
1016 v->mbmode_vlc = &ff_vc1_intfr_non4mv_mbmode_vlc[mbmodetab];
1017 imvtab = get_bits(gb, 2);
1018 v->imv_vlc = &ff_vc1_1ref_mvdata_vlc[imvtab];
1019 // interlaced p-picture cbpcy range is [1, 63]
1020 icbptab = get_bits(gb, 3);
1021 v->cbpcy_vlc = &ff_vc1_icbpcy_vlc[icbptab];
1022 twomvbptab = get_bits(gb, 2);
1023 v->twomvbp_vlc = &ff_vc1_2mv_block_pattern_vlc[twomvbptab];
1024 if (v->fourmvswitch) {
1025 fourmvbptab = get_bits(gb, 2);
1026 v->fourmvbp_vlc = &ff_vc1_4mv_block_pattern_vlc[fourmvbptab];
1030 v->k_x = v->mvrange + 9 + (v->mvrange >> 1); //k_x can be 9 10 12 13
1031 v->k_y = v->mvrange + 8; //k_y can be 8 9 10 11
1032 v->range_x = 1 << (v->k_x - 1);
1033 v->range_y = 1 << (v->k_y - 1);
1037 else if (v->pq < 13)
1041 if (v->fcm != ILACE_FRAME) {
1043 mvmode = get_unary(gb, 1, 4);
1044 lowquant = (v->pq > 12) ? 0 : 1;
1045 v->mv_mode = ff_vc1_mv_pmode_table[lowquant][mvmode];
1046 if (v->mv_mode == MV_PMODE_INTENSITY_COMP) {
1048 mvmode2 = get_unary(gb, 1, 3);
1049 v->mv_mode2 = ff_vc1_mv_pmode_table2[lowquant][mvmode2];
1051 v->intcompfield = decode210(gb);
1052 v->lumscale = get_bits(gb, 6);
1053 v->lumshift = get_bits(gb, 6);
1054 INIT_LUT(v->lumscale, v->lumshift, v->luty, v->lutuv);
1055 if ((v->field_mode) && !v->intcompfield) {
1056 v->lumscale2 = get_bits(gb, 6);
1057 v->lumshift2 = get_bits(gb, 6);
1058 INIT_LUT(v->lumscale2, v->lumshift2, v->luty2, v->lutuv2);
1062 v->qs_last = v->s.quarter_sample;
1063 if (v->mv_mode == MV_PMODE_1MV_HPEL || v->mv_mode == MV_PMODE_1MV_HPEL_BILIN)
1064 v->s.quarter_sample = 0;
1065 else if (v->mv_mode == MV_PMODE_INTENSITY_COMP) {
1066 if (v->mv_mode2 == MV_PMODE_1MV_HPEL || v->mv_mode2 == MV_PMODE_1MV_HPEL_BILIN)
1067 v->s.quarter_sample = 0;
1069 v->s.quarter_sample = 1;
1071 v->s.quarter_sample = 1;
1072 v->s.mspel = !(v->mv_mode == MV_PMODE_1MV_HPEL_BILIN
1073 || (v->mv_mode == MV_PMODE_INTENSITY_COMP
1074 && v->mv_mode2 == MV_PMODE_1MV_HPEL_BILIN));
1076 if (v->fcm == PROGRESSIVE) { // progressive
1077 if ((v->mv_mode == MV_PMODE_INTENSITY_COMP &&
1078 v->mv_mode2 == MV_PMODE_MIXED_MV)
1079 || v->mv_mode == MV_PMODE_MIXED_MV) {
1080 status = bitplane_decoding(v->mv_type_mb_plane, &v->mv_type_is_raw, v);
1083 av_log(v->s.avctx, AV_LOG_DEBUG, "MB MV Type plane encoding: "
1084 "Imode: %i, Invert: %i\n", status>>1, status&1);
1086 v->mv_type_is_raw = 0;
1087 memset(v->mv_type_mb_plane, 0, v->s.mb_stride * v->s.mb_height);
1089 status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);
1092 av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: "
1093 "Imode: %i, Invert: %i\n", status>>1, status&1);
1095 /* Hopefully this is correct for P frames */
1096 v->s.mv_table_index = get_bits(gb, 2); //but using ff_vc1_ tables
1097 v->cbpcy_vlc = &ff_vc1_cbpcy_p_vlc[get_bits(gb, 2)];
1098 } else if (v->fcm == ILACE_FRAME) { // frame interlaced
1099 v->qs_last = v->s.quarter_sample;
1100 v->s.quarter_sample = 1;
1102 } else { // field interlaced
1103 mbmodetab = get_bits(gb, 3);
1104 imvtab = get_bits(gb, 2 + v->numref);
1106 v->imv_vlc = &ff_vc1_1ref_mvdata_vlc[imvtab];
1108 v->imv_vlc = &ff_vc1_2ref_mvdata_vlc[imvtab];
1109 icbptab = get_bits(gb, 3);
1110 v->cbpcy_vlc = &ff_vc1_icbpcy_vlc[icbptab];
1111 if ((v->mv_mode == MV_PMODE_INTENSITY_COMP &&
1112 v->mv_mode2 == MV_PMODE_MIXED_MV) || v->mv_mode == MV_PMODE_MIXED_MV) {
1113 fourmvbptab = get_bits(gb, 2);
1114 v->fourmvbp_vlc = &ff_vc1_4mv_block_pattern_vlc[fourmvbptab];
1115 v->mbmode_vlc = &ff_vc1_if_mmv_mbmode_vlc[mbmodetab];
1117 v->mbmode_vlc = &ff_vc1_if_1mv_mbmode_vlc[mbmodetab];
1121 av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");
1122 vop_dquant_decoding(v);
1125 v->ttfrm = 0; //FIXME Is that so ?
1126 if (v->vstransform) {
1127 v->ttmbf = get_bits1(gb);
1129 v->ttfrm = ff_vc1_ttfrm_to_tt[get_bits(gb, 2)];
1136 case AV_PICTURE_TYPE_B:
1137 // TODO: implement interlaced frame B picture decoding
1138 if (v->fcm == ILACE_FRAME)
1141 v->mvrange = get_unary(gb, 0, 3);
1144 v->k_x = v->mvrange + 9 + (v->mvrange >> 1); //k_x can be 9 10 12 13
1145 v->k_y = v->mvrange + 8; //k_y can be 8 9 10 11
1146 v->range_x = 1 << (v->k_x - 1);
1147 v->range_y = 1 << (v->k_y - 1);
1151 else if (v->pq < 13)
1156 if (v->field_mode) {
1158 if (v->extended_dmv)
1159 v->dmvrange = get_unary(gb, 0, 3);
1160 mvmode = get_unary(gb, 1, 3);
1161 lowquant = (v->pq > 12) ? 0 : 1;
1162 v->mv_mode = ff_vc1_mv_pmode_table2[lowquant][mvmode];
1163 v->qs_last = v->s.quarter_sample;
1164 v->s.quarter_sample = (v->mv_mode == MV_PMODE_1MV || v->mv_mode == MV_PMODE_MIXED_MV);
1165 v->s.mspel = !(v->mv_mode == MV_PMODE_1MV_HPEL_BILIN || v->mv_mode == MV_PMODE_1MV_HPEL);
1166 status = bitplane_decoding(v->forward_mb_plane, &v->fmb_is_raw, v);
1169 av_log(v->s.avctx, AV_LOG_DEBUG, "MB Forward Type plane encoding: "
1170 "Imode: %i, Invert: %i\n", status>>1, status&1);
1171 mbmodetab = get_bits(gb, 3);
1172 if (v->mv_mode == MV_PMODE_MIXED_MV)
1173 v->mbmode_vlc = &ff_vc1_if_mmv_mbmode_vlc[mbmodetab];
1175 v->mbmode_vlc = &ff_vc1_if_1mv_mbmode_vlc[mbmodetab];
1176 imvtab = get_bits(gb, 3);
1177 v->imv_vlc = &ff_vc1_2ref_mvdata_vlc[imvtab];
1178 icbptab = get_bits(gb, 3);
1179 v->cbpcy_vlc = &ff_vc1_icbpcy_vlc[icbptab];
1180 if (v->mv_mode == MV_PMODE_MIXED_MV) {
1181 fourmvbptab = get_bits(gb, 2);
1182 v->fourmvbp_vlc = &ff_vc1_4mv_block_pattern_vlc[fourmvbptab];
1184 v->numref = 1; // interlaced field B pictures are always 2-ref
1186 v->mv_mode = get_bits1(gb) ? MV_PMODE_1MV : MV_PMODE_1MV_HPEL_BILIN;
1187 v->qs_last = v->s.quarter_sample;
1188 v->s.quarter_sample = (v->mv_mode == MV_PMODE_1MV);
1189 v->s.mspel = v->s.quarter_sample;
1190 status = bitplane_decoding(v->direct_mb_plane, &v->dmb_is_raw, v);
1193 av_log(v->s.avctx, AV_LOG_DEBUG, "MB Direct Type plane encoding: "
1194 "Imode: %i, Invert: %i\n", status>>1, status&1);
1195 status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);
1198 av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: "
1199 "Imode: %i, Invert: %i\n", status>>1, status&1);
1200 v->s.mv_table_index = get_bits(gb, 2);
1201 v->cbpcy_vlc = &ff_vc1_cbpcy_p_vlc[get_bits(gb, 2)];
1205 av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");
1206 vop_dquant_decoding(v);
1210 if (v->vstransform) {
1211 v->ttmbf = get_bits1(gb);
1213 v->ttfrm = ff_vc1_ttfrm_to_tt[get_bits(gb, 2)];
1223 v->c_ac_table_index = decode012(gb);
1224 if (v->s.pict_type == AV_PICTURE_TYPE_I || v->s.pict_type == AV_PICTURE_TYPE_BI) {
1225 v->y_ac_table_index = decode012(gb);
1228 v->s.dc_table_index = get_bits1(gb);
1229 if ((v->s.pict_type == AV_PICTURE_TYPE_I || v->s.pict_type == AV_PICTURE_TYPE_BI)
1231 av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");
1232 vop_dquant_decoding(v);
1236 if (v->s.pict_type == AV_PICTURE_TYPE_BI) {
1237 v->s.pict_type = AV_PICTURE_TYPE_B;