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 FFmpeg.
9 * FFmpeg 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 * FFmpeg 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 FFmpeg; 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 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 = wmv2_scantableA;
308 v->zz_4x8 = 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 int w = get_bits(gb, 11);
384 int h = get_bits(gb, 11);
385 avcodec_set_dimensions(v->s.avctx, w, h);
386 skip_bits(gb, 5); //frame rate
387 v->res_x8 = get_bits1(gb);
388 if (get_bits1(gb)) { // something to do with DC VLC selection
389 av_log(avctx, AV_LOG_ERROR, "Unsupported sprite feature\n");
392 skip_bits(gb, 3); //slice code
395 v->res_rtm_flag = get_bits1(gb); //reserved
397 if (!v->res_rtm_flag) {
398 // av_log(avctx, AV_LOG_ERROR,
399 // "0 for reserved RES_RTM_FLAG is forbidden\n");
400 av_log(avctx, AV_LOG_ERROR,
401 "Old WMV3 version detected, some frames may be decoded incorrectly\n");
404 //TODO: figure out what they mean (always 0x402F)
407 av_log(avctx, AV_LOG_DEBUG,
408 "Profile %i:\nfrmrtq_postproc=%i, bitrtq_postproc=%i\n"
409 "LoopFilter=%i, MultiRes=%i, FastUVMC=%i, Extended MV=%i\n"
410 "Rangered=%i, VSTransform=%i, Overlap=%i, SyncMarker=%i\n"
411 "DQuant=%i, Quantizer mode=%i, Max B frames=%i\n",
412 v->profile, v->frmrtq_postproc, v->bitrtq_postproc,
413 v->s.loop_filter, v->multires, v->fastuvmc, v->extended_mv,
414 v->rangered, v->vstransform, v->overlap, v->s.resync_marker,
415 v->dquant, v->quantizer_mode, avctx->max_b_frames);
419 static int decode_sequence_header_adv(VC1Context *v, GetBitContext *gb)
423 v->level = get_bits(gb, 3);
425 av_log(v->s.avctx, AV_LOG_ERROR, "Reserved LEVEL %i\n",v->level);
427 v->chromaformat = get_bits(gb, 2);
428 if (v->chromaformat != 1) {
429 av_log(v->s.avctx, AV_LOG_ERROR,
430 "Only 4:2:0 chroma format supported\n");
435 v->frmrtq_postproc = get_bits(gb, 3); //common
436 // (bitrate-32kbps)/64kbps
437 v->bitrtq_postproc = get_bits(gb, 5); //common
438 v->postprocflag = get_bits1(gb); //common
440 w = (get_bits(gb, 12) + 1) << 1;
441 h = (get_bits(gb, 12) + 1) << 1;
442 avcodec_set_dimensions(v->s.avctx, w, h);
443 v->broadcast = get_bits1(gb);
444 v->interlace = get_bits1(gb);
445 v->tfcntrflag = get_bits1(gb);
446 v->finterpflag = get_bits1(gb);
447 skip_bits1(gb); // reserved
449 av_log(v->s.avctx, AV_LOG_DEBUG,
450 "Advanced Profile level %i:\nfrmrtq_postproc=%i, bitrtq_postproc=%i\n"
451 "LoopFilter=%i, ChromaFormat=%i, Pulldown=%i, Interlace: %i\n"
452 "TFCTRflag=%i, FINTERPflag=%i\n",
453 v->level, v->frmrtq_postproc, v->bitrtq_postproc,
454 v->s.loop_filter, v->chromaformat, v->broadcast, v->interlace,
455 v->tfcntrflag, v->finterpflag);
457 v->psf = get_bits1(gb);
458 if (v->psf) { //PsF, 6.1.13
459 av_log(v->s.avctx, AV_LOG_ERROR, "Progressive Segmented Frame mode: not supported (yet)\n");
462 v->s.max_b_frames = v->s.avctx->max_b_frames = 7;
463 if (get_bits1(gb)) { //Display Info - decoding is not affected by it
465 av_log(v->s.avctx, AV_LOG_DEBUG, "Display extended info:\n");
466 w = get_bits(gb, 14) + 1;
467 h = get_bits(gb, 14) + 1;
468 av_log(v->s.avctx, AV_LOG_DEBUG, "Display dimensions: %ix%i\n", w, h);
470 ar = get_bits(gb, 4);
472 v->s.avctx->sample_aspect_ratio = ff_vc1_pixel_aspect[ar];
473 } else if (ar == 15) {
474 w = get_bits(gb, 8) + 1;
475 h = get_bits(gb, 8) + 1;
476 v->s.avctx->sample_aspect_ratio = (AVRational){w, h};
478 av_reduce(&v->s.avctx->sample_aspect_ratio.num,
479 &v->s.avctx->sample_aspect_ratio.den,
480 v->s.avctx->height * w,
481 v->s.avctx->width * h,
484 av_log(v->s.avctx, AV_LOG_DEBUG, "Aspect: %i:%i\n",
485 v->s.avctx->sample_aspect_ratio.num,
486 v->s.avctx->sample_aspect_ratio.den);
488 if (get_bits1(gb)) { //framerate stuff
490 v->s.avctx->time_base.num = 32;
491 v->s.avctx->time_base.den = get_bits(gb, 16) + 1;
494 nr = get_bits(gb, 8);
495 dr = get_bits(gb, 4);
496 if (nr && nr < 8 && dr && dr < 3) {
497 v->s.avctx->time_base.num = ff_vc1_fps_dr[dr - 1];
498 v->s.avctx->time_base.den = ff_vc1_fps_nr[nr - 1] * 1000;
501 if (v->broadcast) { // Pulldown may be present
502 v->s.avctx->time_base.den *= 2;
503 v->s.avctx->ticks_per_frame = 2;
508 v->color_prim = get_bits(gb, 8);
509 v->transfer_char = get_bits(gb, 8);
510 v->matrix_coef = get_bits(gb, 8);
514 v->hrd_param_flag = get_bits1(gb);
515 if (v->hrd_param_flag) {
517 v->hrd_num_leaky_buckets = get_bits(gb, 5);
518 skip_bits(gb, 4); //bitrate exponent
519 skip_bits(gb, 4); //buffer size exponent
520 for (i = 0; i < v->hrd_num_leaky_buckets; i++) {
521 skip_bits(gb, 16); //hrd_rate[n]
522 skip_bits(gb, 16); //hrd_buffer[n]
528 int vc1_decode_entry_point(AVCodecContext *avctx, VC1Context *v, GetBitContext *gb)
532 av_log(avctx, AV_LOG_DEBUG, "Entry point: %08X\n", show_bits_long(gb, 32));
533 v->broken_link = get_bits1(gb);
534 v->closed_entry = get_bits1(gb);
535 v->panscanflag = get_bits1(gb);
536 v->refdist_flag = get_bits1(gb);
537 v->s.loop_filter = get_bits1(gb);
538 v->fastuvmc = get_bits1(gb);
539 v->extended_mv = get_bits1(gb);
540 v->dquant = get_bits(gb, 2);
541 v->vstransform = get_bits1(gb);
542 v->overlap = get_bits1(gb);
543 v->quantizer_mode = get_bits(gb, 2);
545 if (v->hrd_param_flag) {
546 for (i = 0; i < v->hrd_num_leaky_buckets; i++) {
547 skip_bits(gb, 8); //hrd_full[n]
552 int w = (get_bits(gb, 12)+1)<<1;
553 int h = (get_bits(gb, 12)+1)<<1;
554 avcodec_set_dimensions(avctx, w, h);
557 v->extended_dmv = get_bits1(gb);
558 if ((v->range_mapy_flag = get_bits1(gb))) {
559 av_log(avctx, AV_LOG_ERROR, "Luma scaling is not supported, expect wrong picture\n");
560 v->range_mapy = get_bits(gb, 3);
562 if ((v->range_mapuv_flag = get_bits1(gb))) {
563 av_log(avctx, AV_LOG_ERROR, "Chroma scaling is not supported, expect wrong picture\n");
564 v->range_mapuv = get_bits(gb, 3);
567 av_log(avctx, AV_LOG_DEBUG, "Entry point info:\n"
568 "BrokenLink=%i, ClosedEntry=%i, PanscanFlag=%i\n"
569 "RefDist=%i, Postproc=%i, FastUVMC=%i, ExtMV=%i\n"
570 "DQuant=%i, VSTransform=%i, Overlap=%i, Qmode=%i\n",
571 v->broken_link, v->closed_entry, v->panscanflag, v->refdist_flag, v->s.loop_filter,
572 v->fastuvmc, v->extended_mv, v->dquant, v->vstransform, v->overlap, v->quantizer_mode);
577 int vc1_parse_frame_header(VC1Context *v, GetBitContext* gb)
579 int pqindex, lowquant, status;
582 v->interpfrm = get_bits1(gb);
583 skip_bits(gb, 2); //framecnt unused
586 v->rangeredfrm = get_bits1(gb);
587 v->s.pict_type = get_bits1(gb);
588 if (v->s.avctx->max_b_frames) {
589 if (!v->s.pict_type) {
591 v->s.pict_type = AV_PICTURE_TYPE_I;
593 v->s.pict_type = AV_PICTURE_TYPE_B;
595 v->s.pict_type = AV_PICTURE_TYPE_P;
597 v->s.pict_type = v->s.pict_type ? AV_PICTURE_TYPE_P : AV_PICTURE_TYPE_I;
600 if (v->s.pict_type == AV_PICTURE_TYPE_B) {
601 v->bfraction_lut_index = get_vlc2(gb, ff_vc1_bfraction_vlc.table, VC1_BFRACTION_VLC_BITS, 1);
602 v->bfraction = ff_vc1_bfraction_lut[v->bfraction_lut_index];
603 if (v->bfraction == 0) {
604 v->s.pict_type = AV_PICTURE_TYPE_BI;
607 if (v->s.pict_type == AV_PICTURE_TYPE_I || v->s.pict_type == AV_PICTURE_TYPE_BI)
608 skip_bits(gb, 7); // skip buffer fullness
614 if (v->s.pict_type == AV_PICTURE_TYPE_I || v->s.pict_type == AV_PICTURE_TYPE_BI)
616 if (v->s.pict_type == AV_PICTURE_TYPE_P)
619 /* Quantizer stuff */
620 pqindex = get_bits(gb, 5);
623 if (v->quantizer_mode == QUANT_FRAME_IMPLICIT)
624 v->pq = ff_vc1_pquant_table[0][pqindex];
626 v->pq = ff_vc1_pquant_table[1][pqindex];
629 if (v->quantizer_mode == QUANT_FRAME_IMPLICIT)
630 v->pquantizer = pqindex < 9;
631 if (v->quantizer_mode == QUANT_NON_UNIFORM)
633 v->pqindex = pqindex;
635 v->halfpq = get_bits1(gb);
638 if (v->quantizer_mode == QUANT_FRAME_EXPLICIT)
639 v->pquantizer = get_bits1(gb);
641 if (v->extended_mv == 1)
642 v->mvrange = get_unary(gb, 0, 3);
643 v->k_x = v->mvrange + 9 + (v->mvrange >> 1); //k_x can be 9 10 12 13
644 v->k_y = v->mvrange + 8; //k_y can be 8 9 10 11
645 v->range_x = 1 << (v->k_x - 1);
646 v->range_y = 1 << (v->k_y - 1);
647 if (v->multires && v->s.pict_type != AV_PICTURE_TYPE_B)
648 v->respic = get_bits(gb, 2);
650 if (v->res_x8 && (v->s.pict_type == AV_PICTURE_TYPE_I || v->s.pict_type == AV_PICTURE_TYPE_BI)) {
651 v->x8_type = get_bits1(gb);
654 //av_log(v->s.avctx, AV_LOG_INFO, "%c Frame: QP=[%i]%i (+%i/2) %i\n",
655 // (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);
657 if (v->s.pict_type == AV_PICTURE_TYPE_I || v->s.pict_type == AV_PICTURE_TYPE_P)
660 switch (v->s.pict_type) {
661 case AV_PICTURE_TYPE_P:
662 if (v->pq < 5) v->tt_index = 0;
663 else if (v->pq < 13) v->tt_index = 1;
664 else v->tt_index = 2;
666 lowquant = (v->pq > 12) ? 0 : 1;
667 v->mv_mode = ff_vc1_mv_pmode_table[lowquant][get_unary(gb, 1, 4)];
668 if (v->mv_mode == MV_PMODE_INTENSITY_COMP) {
670 v->mv_mode2 = ff_vc1_mv_pmode_table2[lowquant][get_unary(gb, 1, 3)];
671 v->lumscale = get_bits(gb, 6);
672 v->lumshift = get_bits(gb, 6);
674 /* fill lookup tables for intensity compensation */
677 shift = (255 - v->lumshift * 2) << 6;
678 if (v->lumshift > 31)
681 scale = v->lumscale + 32;
682 if (v->lumshift > 31)
683 shift = (v->lumshift - 64) << 6;
685 shift = v->lumshift << 6;
687 for (i = 0; i < 256; i++) {
688 v->luty[i] = av_clip_uint8((scale * i + shift + 32) >> 6);
689 v->lutuv[i] = av_clip_uint8((scale * (i - 128) + 128*64 + 32) >> 6);
692 v->qs_last = v->s.quarter_sample;
693 if (v->mv_mode == MV_PMODE_1MV_HPEL || v->mv_mode == MV_PMODE_1MV_HPEL_BILIN)
694 v->s.quarter_sample = 0;
695 else if (v->mv_mode == MV_PMODE_INTENSITY_COMP) {
696 if (v->mv_mode2 == MV_PMODE_1MV_HPEL || v->mv_mode2 == MV_PMODE_1MV_HPEL_BILIN)
697 v->s.quarter_sample = 0;
699 v->s.quarter_sample = 1;
701 v->s.quarter_sample = 1;
702 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));
704 if ((v->mv_mode == MV_PMODE_INTENSITY_COMP &&
705 v->mv_mode2 == MV_PMODE_MIXED_MV) ||
706 v->mv_mode == MV_PMODE_MIXED_MV) {
707 status = bitplane_decoding(v->mv_type_mb_plane, &v->mv_type_is_raw, v);
710 av_log(v->s.avctx, AV_LOG_DEBUG, "MB MV Type plane encoding: "
711 "Imode: %i, Invert: %i\n", status>>1, status&1);
713 v->mv_type_is_raw = 0;
714 memset(v->mv_type_mb_plane, 0, v->s.mb_stride * v->s.mb_height);
716 status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);
719 av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: "
720 "Imode: %i, Invert: %i\n", status>>1, status&1);
722 /* Hopefully this is correct for P frames */
723 v->s.mv_table_index = get_bits(gb, 2); //but using ff_vc1_ tables
724 v->cbpcy_vlc = &ff_vc1_cbpcy_p_vlc[get_bits(gb, 2)];
727 av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");
728 vop_dquant_decoding(v);
731 v->ttfrm = 0; //FIXME Is that so ?
732 if (v->vstransform) {
733 v->ttmbf = get_bits1(gb);
735 v->ttfrm = ff_vc1_ttfrm_to_tt[get_bits(gb, 2)];
742 case AV_PICTURE_TYPE_B:
743 if (v->pq < 5) v->tt_index = 0;
744 else if (v->pq < 13) v->tt_index = 1;
745 else v->tt_index = 2;
747 v->mv_mode = get_bits1(gb) ? MV_PMODE_1MV : MV_PMODE_1MV_HPEL_BILIN;
748 v->qs_last = v->s.quarter_sample;
749 v->s.quarter_sample = (v->mv_mode == MV_PMODE_1MV);
750 v->s.mspel = v->s.quarter_sample;
752 status = bitplane_decoding(v->direct_mb_plane, &v->dmb_is_raw, v);
755 av_log(v->s.avctx, AV_LOG_DEBUG, "MB Direct Type plane encoding: "
756 "Imode: %i, Invert: %i\n", status>>1, status&1);
757 status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);
760 av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: "
761 "Imode: %i, Invert: %i\n", status>>1, status&1);
763 v->s.mv_table_index = get_bits(gb, 2);
764 v->cbpcy_vlc = &ff_vc1_cbpcy_p_vlc[get_bits(gb, 2)];
767 av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");
768 vop_dquant_decoding(v);
772 if (v->vstransform) {
773 v->ttmbf = get_bits1(gb);
775 v->ttfrm = ff_vc1_ttfrm_to_tt[get_bits(gb, 2)];
786 v->c_ac_table_index = decode012(gb);
787 if (v->s.pict_type == AV_PICTURE_TYPE_I || v->s.pict_type == AV_PICTURE_TYPE_BI) {
788 v->y_ac_table_index = decode012(gb);
791 v->s.dc_table_index = get_bits1(gb);
794 if (v->s.pict_type == AV_PICTURE_TYPE_BI) {
795 v->s.pict_type = AV_PICTURE_TYPE_B;
801 /* fill lookup tables for intensity compensation */
802 #define INIT_LUT(lumscale, lumshift, luty, lutuv) \
805 shift = (255 - lumshift * 2) << 6; \
809 scale = lumscale + 32; \
811 shift = (lumshift - 64) << 6; \
813 shift = lumshift << 6; \
815 for (i = 0; i < 256; i++) { \
816 luty[i] = av_clip_uint8((scale * i + shift + 32) >> 6); \
817 lutuv[i] = av_clip_uint8((scale * (i - 128) + 128*64 + 32) >> 6); \
820 int vc1_parse_frame_header_adv(VC1Context *v, GetBitContext* gb)
822 int pqindex, lowquant;
824 int mbmodetab, imvtab, icbptab, twomvbptab, fourmvbptab; /* useful only for debugging */
825 int scale, shift, i; /* for initializing LUT for intensity compensation */
830 v->p_frame_skipped = 0;
831 if (v->second_field) {
832 v->s.pict_type = (v->fptype & 1) ? AV_PICTURE_TYPE_P : AV_PICTURE_TYPE_I;
834 v->s.pict_type = (v->fptype & 1) ? AV_PICTURE_TYPE_BI : AV_PICTURE_TYPE_B;
835 v->s.current_picture_ptr->f.pict_type = v->s.pict_type;
836 if (!v->pic_header_flag)
837 goto parse_common_info;
842 v->fcm = decode012(gb);
846 if (!v->warn_interlaced++)
847 av_log(v->s.avctx, AV_LOG_ERROR,
848 "Interlaced frames/fields support is incomplete\n");
855 v->fptype = get_bits(gb, 3);
856 v->s.pict_type = (v->fptype & 2) ? AV_PICTURE_TYPE_P : AV_PICTURE_TYPE_I;
857 if (v->fptype & 4) // B-picture
858 v->s.pict_type = (v->fptype & 2) ? AV_PICTURE_TYPE_BI : AV_PICTURE_TYPE_B;
860 switch (get_unary(gb, 0, 4)) {
862 v->s.pict_type = AV_PICTURE_TYPE_P;
865 v->s.pict_type = AV_PICTURE_TYPE_B;
868 v->s.pict_type = AV_PICTURE_TYPE_I;
871 v->s.pict_type = AV_PICTURE_TYPE_BI;
874 v->s.pict_type = AV_PICTURE_TYPE_P; // skipped pic
875 v->p_frame_skipped = 1;
882 if (!v->interlace || v->psf) {
883 v->rptfrm = get_bits(gb, 2);
885 v->tff = get_bits1(gb);
886 v->rff = get_bits1(gb);
889 if (v->panscanflag) {
890 av_log_missing_feature(v->s.avctx, "Pan-scan", 0);
893 if (v->p_frame_skipped) {
896 v->rnd = get_bits1(gb);
898 v->uvsamp = get_bits1(gb);
900 if (!v->refdist_flag)
903 if ((v->s.pict_type != AV_PICTURE_TYPE_B)
904 && (v->s.pict_type != AV_PICTURE_TYPE_BI)) {
905 v->refdist = get_bits(gb, 2);
907 v->refdist += get_unary(gb, 0, 16);
909 v->bfraction_lut_index = get_vlc2(gb, ff_vc1_bfraction_vlc.table, VC1_BFRACTION_VLC_BITS, 1);
910 v->bfraction = ff_vc1_bfraction_lut[v->bfraction_lut_index];
911 v->frfd = (v->bfraction * v->refdist) >> 8;
912 v->brfd = v->refdist - v->frfd - 1;
917 goto parse_common_info;
920 v->interpfrm = get_bits1(gb);
921 if (v->s.pict_type == AV_PICTURE_TYPE_B) {
922 v->bfraction_lut_index = get_vlc2(gb, ff_vc1_bfraction_vlc.table, VC1_BFRACTION_VLC_BITS, 1);
923 v->bfraction = ff_vc1_bfraction_lut[v->bfraction_lut_index];
924 if (v->bfraction == 0) {
925 v->s.pict_type = AV_PICTURE_TYPE_BI; /* XXX: should not happen here */
931 v->cur_field_type = !(v->tff ^ v->second_field);
932 pqindex = get_bits(gb, 5);
935 v->pqindex = pqindex;
936 if (v->quantizer_mode == QUANT_FRAME_IMPLICIT)
937 v->pq = ff_vc1_pquant_table[0][pqindex];
939 v->pq = ff_vc1_pquant_table[1][pqindex];
942 if (v->quantizer_mode == QUANT_FRAME_IMPLICIT)
943 v->pquantizer = pqindex < 9;
944 if (v->quantizer_mode == QUANT_NON_UNIFORM)
946 v->pqindex = pqindex;
948 v->halfpq = get_bits1(gb);
951 if (v->quantizer_mode == QUANT_FRAME_EXPLICIT)
952 v->pquantizer = get_bits1(gb);
954 v->postproc = get_bits(gb, 2);
956 if (v->s.pict_type == AV_PICTURE_TYPE_I || v->s.pict_type == AV_PICTURE_TYPE_P)
962 switch (v->s.pict_type) {
963 case AV_PICTURE_TYPE_I:
964 case AV_PICTURE_TYPE_BI:
965 if (v->fcm == 1) { //interlace frame picture
966 status = bitplane_decoding(v->fieldtx_plane, &v->fieldtx_is_raw, v);
969 av_log(v->s.avctx, AV_LOG_DEBUG, "FIELDTX plane encoding: "
970 "Imode: %i, Invert: %i\n", status>>1, status&1);
972 status = bitplane_decoding(v->acpred_plane, &v->acpred_is_raw, v);
975 av_log(v->s.avctx, AV_LOG_DEBUG, "ACPRED plane encoding: "
976 "Imode: %i, Invert: %i\n", status>>1, status&1);
977 v->condover = CONDOVER_NONE;
978 if (v->overlap && v->pq <= 8) {
979 v->condover = decode012(gb);
980 if (v->condover == CONDOVER_SELECT) {
981 status = bitplane_decoding(v->over_flags_plane, &v->overflg_is_raw, v);
984 av_log(v->s.avctx, AV_LOG_DEBUG, "CONDOVER plane encoding: "
985 "Imode: %i, Invert: %i\n", status>>1, status&1);
989 case AV_PICTURE_TYPE_P:
991 v->numref = get_bits1(gb);
993 v->reffield = get_bits1(gb);
994 v->ref_field_type[0] = v->reffield ^ !v->cur_field_type;
998 v->mvrange = get_unary(gb, 0, 3);
1002 if (v->extended_dmv)
1003 v->dmvrange = get_unary(gb, 0, 3);
1006 if (v->fcm == 1) { // interlaced frame picture
1007 v->fourmvswitch = get_bits1(gb);
1008 v->intcomp = get_bits1(gb);
1010 v->lumscale = get_bits(gb, 6);
1011 v->lumshift = get_bits(gb, 6);
1012 INIT_LUT(v->lumscale, v->lumshift, v->luty, v->lutuv);
1014 status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);
1015 av_log(v->s.avctx, AV_LOG_DEBUG, "SKIPMB plane encoding: "
1016 "Imode: %i, Invert: %i\n", status>>1, status&1);
1017 mbmodetab = get_bits(gb, 2);
1018 if (v->fourmvswitch)
1019 v->mbmode_vlc = &ff_vc1_intfr_4mv_mbmode_vlc[mbmodetab];
1021 v->mbmode_vlc = &ff_vc1_intfr_non4mv_mbmode_vlc[mbmodetab];
1022 imvtab = get_bits(gb, 2);
1023 v->imv_vlc = &ff_vc1_1ref_mvdata_vlc[imvtab];
1024 // interlaced p-picture cbpcy range is [1, 63]
1025 icbptab = get_bits(gb, 3);
1026 v->cbpcy_vlc = &ff_vc1_icbpcy_vlc[icbptab];
1027 twomvbptab = get_bits(gb, 2);
1028 v->twomvbp_vlc = &ff_vc1_2mv_block_pattern_vlc[twomvbptab];
1029 if (v->fourmvswitch) {
1030 fourmvbptab = get_bits(gb, 2);
1031 v->fourmvbp_vlc = &ff_vc1_4mv_block_pattern_vlc[fourmvbptab];
1035 v->k_x = v->mvrange + 9 + (v->mvrange >> 1); //k_x can be 9 10 12 13
1036 v->k_y = v->mvrange + 8; //k_y can be 8 9 10 11
1037 v->range_x = 1 << (v->k_x - 1);
1038 v->range_y = 1 << (v->k_y - 1);
1042 else if (v->pq < 13)
1048 mvmode = get_unary(gb, 1, 4);
1049 lowquant = (v->pq > 12) ? 0 : 1;
1050 v->mv_mode = ff_vc1_mv_pmode_table[lowquant][mvmode];
1051 if (v->mv_mode == MV_PMODE_INTENSITY_COMP) {
1053 mvmode2 = get_unary(gb, 1, 3);
1054 v->mv_mode2 = ff_vc1_mv_pmode_table2[lowquant][mvmode2];
1056 v->intcompfield = decode210(gb);
1057 v->lumscale = get_bits(gb, 6);
1058 v->lumshift = get_bits(gb, 6);
1059 INIT_LUT(v->lumscale, v->lumshift, v->luty, v->lutuv);
1060 if ((v->field_mode) && !v->intcompfield) {
1061 v->lumscale2 = get_bits(gb, 6);
1062 v->lumshift2 = get_bits(gb, 6);
1063 INIT_LUT(v->lumscale2, v->lumshift2, v->luty2, v->lutuv2);
1067 v->qs_last = v->s.quarter_sample;
1068 if (v->mv_mode == MV_PMODE_1MV_HPEL || v->mv_mode == MV_PMODE_1MV_HPEL_BILIN)
1069 v->s.quarter_sample = 0;
1070 else if (v->mv_mode == MV_PMODE_INTENSITY_COMP) {
1071 if (v->mv_mode2 == MV_PMODE_1MV_HPEL || v->mv_mode2 == MV_PMODE_1MV_HPEL_BILIN)
1072 v->s.quarter_sample = 0;
1074 v->s.quarter_sample = 1;
1076 v->s.quarter_sample = 1;
1077 v->s.mspel = !(v->mv_mode == MV_PMODE_1MV_HPEL_BILIN
1078 || (v->mv_mode == MV_PMODE_INTENSITY_COMP
1079 && v->mv_mode2 == MV_PMODE_1MV_HPEL_BILIN));
1081 if (v->fcm == 0) { // progressive
1082 if ((v->mv_mode == MV_PMODE_INTENSITY_COMP &&
1083 v->mv_mode2 == MV_PMODE_MIXED_MV)
1084 || v->mv_mode == MV_PMODE_MIXED_MV) {
1085 status = bitplane_decoding(v->mv_type_mb_plane, &v->mv_type_is_raw, v);
1088 av_log(v->s.avctx, AV_LOG_DEBUG, "MB MV Type plane encoding: "
1089 "Imode: %i, Invert: %i\n", status>>1, status&1);
1091 v->mv_type_is_raw = 0;
1092 memset(v->mv_type_mb_plane, 0, v->s.mb_stride * v->s.mb_height);
1094 status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);
1097 av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: "
1098 "Imode: %i, Invert: %i\n", status>>1, status&1);
1100 /* Hopefully this is correct for P frames */
1101 v->s.mv_table_index = get_bits(gb, 2); //but using ff_vc1_ tables
1102 v->cbpcy_vlc = &ff_vc1_cbpcy_p_vlc[get_bits(gb, 2)];
1103 } else if (v->fcm == 1) { // frame interlaced
1104 v->qs_last = v->s.quarter_sample;
1105 v->s.quarter_sample = 1;
1107 } else { // field interlaced
1108 mbmodetab = get_bits(gb, 3);
1109 imvtab = get_bits(gb, 2 + v->numref);
1111 v->imv_vlc = &ff_vc1_1ref_mvdata_vlc[imvtab];
1113 v->imv_vlc = &ff_vc1_2ref_mvdata_vlc[imvtab];
1114 icbptab = get_bits(gb, 3);
1115 v->cbpcy_vlc = &ff_vc1_icbpcy_vlc[icbptab];
1116 if ((v->mv_mode == MV_PMODE_INTENSITY_COMP &&
1117 v->mv_mode2 == MV_PMODE_MIXED_MV) || v->mv_mode == MV_PMODE_MIXED_MV) {
1118 fourmvbptab = get_bits(gb, 2);
1119 v->fourmvbp_vlc = &ff_vc1_4mv_block_pattern_vlc[fourmvbptab];
1120 v->mbmode_vlc = &ff_vc1_if_mmv_mbmode_vlc[mbmodetab];
1122 v->mbmode_vlc = &ff_vc1_if_1mv_mbmode_vlc[mbmodetab];
1126 av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");
1127 vop_dquant_decoding(v);
1130 v->ttfrm = 0; //FIXME Is that so ?
1131 if (v->vstransform) {
1132 v->ttmbf = get_bits1(gb);
1134 v->ttfrm = ff_vc1_ttfrm_to_tt[get_bits(gb, 2)];
1141 case AV_PICTURE_TYPE_B:
1142 // TODO: implement interlaced frame B picture decoding
1146 v->mvrange = get_unary(gb, 0, 3);
1149 v->k_x = v->mvrange + 9 + (v->mvrange >> 1); //k_x can be 9 10 12 13
1150 v->k_y = v->mvrange + 8; //k_y can be 8 9 10 11
1151 v->range_x = 1 << (v->k_x - 1);
1152 v->range_y = 1 << (v->k_y - 1);
1156 else if (v->pq < 13)
1161 if (v->field_mode) {
1163 av_log(v->s.avctx, AV_LOG_ERROR, "B Fields do not work currently\n");
1165 if (v->extended_dmv)
1166 v->dmvrange = get_unary(gb, 0, 3);
1167 mvmode = get_unary(gb, 1, 3);
1168 lowquant = (v->pq > 12) ? 0 : 1;
1169 v->mv_mode = ff_vc1_mv_pmode_table2[lowquant][mvmode];
1170 v->qs_last = v->s.quarter_sample;
1171 v->s.quarter_sample = (v->mv_mode == MV_PMODE_1MV || v->mv_mode == MV_PMODE_MIXED_MV);
1172 v->s.mspel = !(v->mv_mode == MV_PMODE_1MV_HPEL_BILIN || v->mv_mode == MV_PMODE_1MV_HPEL);
1173 status = bitplane_decoding(v->forward_mb_plane, &v->fmb_is_raw, v);
1176 av_log(v->s.avctx, AV_LOG_DEBUG, "MB Forward Type plane encoding: "
1177 "Imode: %i, Invert: %i\n", status>>1, status&1);
1178 mbmodetab = get_bits(gb, 3);
1179 if (v->mv_mode == MV_PMODE_MIXED_MV)
1180 v->mbmode_vlc = &ff_vc1_if_mmv_mbmode_vlc[mbmodetab];
1182 v->mbmode_vlc = &ff_vc1_if_1mv_mbmode_vlc[mbmodetab];
1183 imvtab = get_bits(gb, 3);
1184 v->imv_vlc = &ff_vc1_2ref_mvdata_vlc[imvtab];
1185 icbptab = get_bits(gb, 3);
1186 v->cbpcy_vlc = &ff_vc1_icbpcy_vlc[icbptab];
1187 if (v->mv_mode == MV_PMODE_MIXED_MV) {
1188 fourmvbptab = get_bits(gb, 2);
1189 v->fourmvbp_vlc = &ff_vc1_4mv_block_pattern_vlc[fourmvbptab];
1191 v->numref = 1; // interlaced field B pictures are always 2-ref
1193 v->mv_mode = get_bits1(gb) ? MV_PMODE_1MV : MV_PMODE_1MV_HPEL_BILIN;
1194 v->qs_last = v->s.quarter_sample;
1195 v->s.quarter_sample = (v->mv_mode == MV_PMODE_1MV);
1196 v->s.mspel = v->s.quarter_sample;
1197 status = bitplane_decoding(v->direct_mb_plane, &v->dmb_is_raw, v);
1200 av_log(v->s.avctx, AV_LOG_DEBUG, "MB Direct Type plane encoding: "
1201 "Imode: %i, Invert: %i\n", status>>1, status&1);
1202 status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);
1205 av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: "
1206 "Imode: %i, Invert: %i\n", status>>1, status&1);
1207 v->s.mv_table_index = get_bits(gb, 2);
1208 v->cbpcy_vlc = &ff_vc1_cbpcy_p_vlc[get_bits(gb, 2)];
1212 av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");
1213 vop_dquant_decoding(v);
1217 if (v->vstransform) {
1218 v->ttmbf = get_bits1(gb);
1220 v->ttfrm = ff_vc1_ttfrm_to_tt[get_bits(gb, 2)];
1230 v->c_ac_table_index = decode012(gb);
1231 if (v->s.pict_type == AV_PICTURE_TYPE_I || v->s.pict_type == AV_PICTURE_TYPE_BI) {
1232 v->y_ac_table_index = decode012(gb);
1235 v->s.dc_table_index = get_bits1(gb);
1236 if ((v->s.pict_type == AV_PICTURE_TYPE_I || v->s.pict_type == AV_PICTURE_TYPE_BI)
1238 av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");
1239 vop_dquant_decoding(v);
1243 if (v->s.pict_type == AV_PICTURE_TYPE_BI) {
1244 v->s.pict_type = AV_PICTURE_TYPE_B;