2 * VC-1 and WMV3 decoder
3 * Copyright (c) 2006-2007 Konstantin Shishkov
4 * Partly based on vc9.c (c) 2005 Anonymous, Alex Beregszaszi, Michael Niedermayer
6 * This file is part of FFmpeg.
8 * FFmpeg is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
13 * FFmpeg is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with FFmpeg; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
26 * VC-1 and WMV3 decoder
31 #include "mpegvideo.h"
34 #include "vc1acdata.h"
35 #include "msmpeg4data.h"
40 #define MB_INTRA_VLC_BITS 9
43 static const uint16_t table_mb_intra[64][2];
47 * Get unary code of limited length
48 * @fixme FIXME Slow and ugly
49 * @param gb GetBitContext
50 * @param[in] stop The bitstop value (unary code of 1's or 0's)
51 * @param[in] len Maximum length
52 * @return Unary length/index
54 static int get_prefix(GetBitContext *gb, int stop, int len)
59 for(i = 0; i < len && get_bits1(gb) != stop; i++);
61 /* int i = 0, tmp = !stop;
63 while (i != len && tmp != stop)
65 tmp = get_bits(gb, 1);
68 if (i == len && tmp != stop) return len+1;
76 buf=GET_CACHE(re, gb); //Still not sure
79 log= av_log2(-buf); //FIXME: -?
81 LAST_SKIP_BITS(re, gb, log+1);
86 LAST_SKIP_BITS(re, gb, limit);
92 static inline int decode210(GetBitContext *gb){
98 return 2 - get_bits1(gb);
102 * Init VC-1 specific tables and VC1Context members
103 * @param v The VC1Context to initialize
106 static int vc1_init_common(VC1Context *v)
111 v->hrd_rate = v->hrd_buffer = NULL;
117 init_vlc(&ff_vc1_bfraction_vlc, VC1_BFRACTION_VLC_BITS, 23,
118 ff_vc1_bfraction_bits, 1, 1,
119 ff_vc1_bfraction_codes, 1, 1, 1);
120 init_vlc(&ff_vc1_norm2_vlc, VC1_NORM2_VLC_BITS, 4,
121 ff_vc1_norm2_bits, 1, 1,
122 ff_vc1_norm2_codes, 1, 1, 1);
123 init_vlc(&ff_vc1_norm6_vlc, VC1_NORM6_VLC_BITS, 64,
124 ff_vc1_norm6_bits, 1, 1,
125 ff_vc1_norm6_codes, 2, 2, 1);
126 init_vlc(&ff_vc1_imode_vlc, VC1_IMODE_VLC_BITS, 7,
127 ff_vc1_imode_bits, 1, 1,
128 ff_vc1_imode_codes, 1, 1, 1);
131 init_vlc(&ff_vc1_ttmb_vlc[i], VC1_TTMB_VLC_BITS, 16,
132 ff_vc1_ttmb_bits[i], 1, 1,
133 ff_vc1_ttmb_codes[i], 2, 2, 1);
134 init_vlc(&ff_vc1_ttblk_vlc[i], VC1_TTBLK_VLC_BITS, 8,
135 ff_vc1_ttblk_bits[i], 1, 1,
136 ff_vc1_ttblk_codes[i], 1, 1, 1);
137 init_vlc(&ff_vc1_subblkpat_vlc[i], VC1_SUBBLKPAT_VLC_BITS, 15,
138 ff_vc1_subblkpat_bits[i], 1, 1,
139 ff_vc1_subblkpat_codes[i], 1, 1, 1);
143 init_vlc(&ff_vc1_4mv_block_pattern_vlc[i], VC1_4MV_BLOCK_PATTERN_VLC_BITS, 16,
144 ff_vc1_4mv_block_pattern_bits[i], 1, 1,
145 ff_vc1_4mv_block_pattern_codes[i], 1, 1, 1);
146 init_vlc(&ff_vc1_cbpcy_p_vlc[i], VC1_CBPCY_P_VLC_BITS, 64,
147 ff_vc1_cbpcy_p_bits[i], 1, 1,
148 ff_vc1_cbpcy_p_codes[i], 2, 2, 1);
149 init_vlc(&ff_vc1_mv_diff_vlc[i], VC1_MV_DIFF_VLC_BITS, 73,
150 ff_vc1_mv_diff_bits[i], 1, 1,
151 ff_vc1_mv_diff_codes[i], 2, 2, 1);
154 init_vlc(&ff_vc1_ac_coeff_table[i], AC_VLC_BITS, vc1_ac_sizes[i],
155 &vc1_ac_tables[i][0][1], 8, 4,
156 &vc1_ac_tables[i][0][0], 8, 4, 1);
157 init_vlc(&ff_msmp4_mb_i_vlc, MB_INTRA_VLC_BITS, 64,
158 &ff_msmp4_mb_i_table[0][1], 4, 2,
159 &ff_msmp4_mb_i_table[0][0], 4, 2, 1);
164 v->mvrange = 0; /* 7.1.1.18, p80 */
169 /***********************************************************************/
171 * @defgroup bitplane VC9 Bitplane decoding
176 /** @addtogroup bitplane
189 /** @} */ //imode defines
191 /** Decode rows by checking if they are skipped
192 * @param plane Buffer to store decoded bits
193 * @param[in] width Width of this buffer
194 * @param[in] height Height of this buffer
195 * @param[in] stride of this buffer
197 static void decode_rowskip(uint8_t* plane, int width, int height, int stride, GetBitContext *gb){
200 for (y=0; y<height; y++){
201 if (!get_bits(gb, 1)) //rowskip
202 memset(plane, 0, width);
204 for (x=0; x<width; x++)
205 plane[x] = get_bits(gb, 1);
210 /** Decode columns by checking if they are skipped
211 * @param plane Buffer to store decoded bits
212 * @param[in] width Width of this buffer
213 * @param[in] height Height of this buffer
214 * @param[in] stride of this buffer
215 * @fixme FIXME: Optimize
217 static void decode_colskip(uint8_t* plane, int width, int height, int stride, GetBitContext *gb){
220 for (x=0; x<width; x++){
221 if (!get_bits(gb, 1)) //colskip
222 for (y=0; y<height; y++)
225 for (y=0; y<height; y++)
226 plane[y*stride] = get_bits(gb, 1);
231 /** Decode a bitplane's bits
232 * @param bp Bitplane where to store the decode bits
233 * @param v VC-1 context for bit reading and logging
235 * @fixme FIXME: Optimize
237 static int bitplane_decoding(uint8_t* data, int *raw_flag, VC1Context *v)
239 GetBitContext *gb = &v->s.gb;
241 int imode, x, y, code, offset;
242 uint8_t invert, *planep = data;
243 int width, height, stride;
245 width = v->s.mb_width;
246 height = v->s.mb_height;
247 stride = v->s.mb_stride;
248 invert = get_bits(gb, 1);
249 imode = get_vlc2(gb, ff_vc1_imode_vlc.table, VC1_IMODE_VLC_BITS, 1);
255 //Data is actually read in the MB layer (same for all tests == "raw")
256 *raw_flag = 1; //invert ignored
260 if ((height * width) & 1)
262 *planep++ = get_bits(gb, 1);
266 // decode bitplane as one long line
267 for (y = offset; y < height * width; y += 2) {
268 code = get_vlc2(gb, ff_vc1_norm2_vlc.table, VC1_NORM2_VLC_BITS, 1);
269 *planep++ = code & 1;
271 if(offset == width) {
273 planep += stride - width;
275 *planep++ = code >> 1;
277 if(offset == width) {
279 planep += stride - width;
285 if(!(height % 3) && (width % 3)) { // use 2x3 decoding
286 for(y = 0; y < height; y+= 3) {
287 for(x = width & 1; x < width; x += 2) {
288 code = get_vlc2(gb, ff_vc1_norm6_vlc.table, VC1_NORM6_VLC_BITS, 2);
290 av_log(v->s.avctx, AV_LOG_DEBUG, "invalid NORM-6 VLC\n");
293 planep[x + 0] = (code >> 0) & 1;
294 planep[x + 1] = (code >> 1) & 1;
295 planep[x + 0 + stride] = (code >> 2) & 1;
296 planep[x + 1 + stride] = (code >> 3) & 1;
297 planep[x + 0 + stride * 2] = (code >> 4) & 1;
298 planep[x + 1 + stride * 2] = (code >> 5) & 1;
300 planep += stride * 3;
302 if(width & 1) decode_colskip(data, 1, height, stride, &v->s.gb);
304 planep += (height & 1) * stride;
305 for(y = height & 1; y < height; y += 2) {
306 for(x = width % 3; x < width; x += 3) {
307 code = get_vlc2(gb, ff_vc1_norm6_vlc.table, VC1_NORM6_VLC_BITS, 2);
309 av_log(v->s.avctx, AV_LOG_DEBUG, "invalid NORM-6 VLC\n");
312 planep[x + 0] = (code >> 0) & 1;
313 planep[x + 1] = (code >> 1) & 1;
314 planep[x + 2] = (code >> 2) & 1;
315 planep[x + 0 + stride] = (code >> 3) & 1;
316 planep[x + 1 + stride] = (code >> 4) & 1;
317 planep[x + 2 + stride] = (code >> 5) & 1;
319 planep += stride * 2;
322 if(x) decode_colskip(data , x, height , stride, &v->s.gb);
323 if(height & 1) decode_rowskip(data+x, width - x, 1, stride, &v->s.gb);
327 decode_rowskip(data, width, height, stride, &v->s.gb);
330 decode_colskip(data, width, height, stride, &v->s.gb);
335 /* Applying diff operator */
336 if (imode == IMODE_DIFF2 || imode == IMODE_DIFF6)
340 for (x=1; x<width; x++)
341 planep[x] ^= planep[x-1];
342 for (y=1; y<height; y++)
345 planep[0] ^= planep[-stride];
346 for (x=1; x<width; x++)
348 if (planep[x-1] != planep[x-stride]) planep[x] ^= invert;
349 else planep[x] ^= planep[x-1];
356 for (x=0; x<stride*height; x++) planep[x] = !planep[x]; //FIXME stride
358 return (imode<<1) + invert;
361 /** @} */ //Bitplane group
363 /***********************************************************************/
364 /** VOP Dquant decoding
365 * @param v VC-1 Context
367 static int vop_dquant_decoding(VC1Context *v)
369 GetBitContext *gb = &v->s.gb;
375 pqdiff = get_bits(gb, 3);
376 if (pqdiff == 7) v->altpq = get_bits(gb, 5);
377 else v->altpq = v->pq + pqdiff + 1;
381 v->dquantfrm = get_bits(gb, 1);
384 v->dqprofile = get_bits(gb, 2);
385 switch (v->dqprofile)
387 case DQPROFILE_SINGLE_EDGE:
388 case DQPROFILE_DOUBLE_EDGES:
389 v->dqsbedge = get_bits(gb, 2);
391 case DQPROFILE_ALL_MBS:
392 v->dqbilevel = get_bits(gb, 1);
393 default: break; //Forbidden ?
395 if (v->dqbilevel || v->dqprofile != DQPROFILE_ALL_MBS)
397 pqdiff = get_bits(gb, 3);
398 if (pqdiff == 7) v->altpq = get_bits(gb, 5);
399 else v->altpq = v->pq + pqdiff + 1;
406 /** Put block onto picture
408 static void vc1_put_block(VC1Context *v, DCTELEM block[6][64])
412 DSPContext *dsp = &v->s.dsp;
416 for(k = 0; k < 6; k++)
417 for(j = 0; j < 8; j++)
418 for(i = 0; i < 8; i++)
419 block[k][i + j*8] = ((block[k][i + j*8] - 128) << 1) + 128;
422 ys = v->s.current_picture.linesize[0];
423 us = v->s.current_picture.linesize[1];
424 vs = v->s.current_picture.linesize[2];
427 dsp->put_pixels_clamped(block[0], Y, ys);
428 dsp->put_pixels_clamped(block[1], Y + 8, ys);
430 dsp->put_pixels_clamped(block[2], Y, ys);
431 dsp->put_pixels_clamped(block[3], Y + 8, ys);
433 if(!(v->s.flags & CODEC_FLAG_GRAY)) {
434 dsp->put_pixels_clamped(block[4], v->s.dest[1], us);
435 dsp->put_pixels_clamped(block[5], v->s.dest[2], vs);
439 /** Do motion compensation over 1 macroblock
440 * Mostly adapted hpel_motion and qpel_motion from mpegvideo.c
442 static void vc1_mc_1mv(VC1Context *v, int dir)
444 MpegEncContext *s = &v->s;
445 DSPContext *dsp = &v->s.dsp;
446 uint8_t *srcY, *srcU, *srcV;
447 int dxy, uvdxy, mx, my, uvmx, uvmy, src_x, src_y, uvsrc_x, uvsrc_y;
449 if(!v->s.last_picture.data[0])return;
451 mx = s->mv[dir][0][0];
452 my = s->mv[dir][0][1];
454 // store motion vectors for further use in B frames
455 if(s->pict_type == P_TYPE) {
456 s->current_picture.motion_val[1][s->block_index[0]][0] = mx;
457 s->current_picture.motion_val[1][s->block_index[0]][1] = my;
459 uvmx = (mx + ((mx & 3) == 3)) >> 1;
460 uvmy = (my + ((my & 3) == 3)) >> 1;
462 uvmx = uvmx + ((uvmx<0)?(uvmx&1):-(uvmx&1));
463 uvmy = uvmy + ((uvmy<0)?(uvmy&1):-(uvmy&1));
466 srcY = s->last_picture.data[0];
467 srcU = s->last_picture.data[1];
468 srcV = s->last_picture.data[2];
470 srcY = s->next_picture.data[0];
471 srcU = s->next_picture.data[1];
472 srcV = s->next_picture.data[2];
475 src_x = s->mb_x * 16 + (mx >> 2);
476 src_y = s->mb_y * 16 + (my >> 2);
477 uvsrc_x = s->mb_x * 8 + (uvmx >> 2);
478 uvsrc_y = s->mb_y * 8 + (uvmy >> 2);
480 if(v->profile != PROFILE_ADVANCED){
481 src_x = av_clip( src_x, -16, s->mb_width * 16);
482 src_y = av_clip( src_y, -16, s->mb_height * 16);
483 uvsrc_x = av_clip(uvsrc_x, -8, s->mb_width * 8);
484 uvsrc_y = av_clip(uvsrc_y, -8, s->mb_height * 8);
486 src_x = av_clip( src_x, -17, s->avctx->coded_width);
487 src_y = av_clip( src_y, -18, s->avctx->coded_height + 1);
488 uvsrc_x = av_clip(uvsrc_x, -8, s->avctx->coded_width >> 1);
489 uvsrc_y = av_clip(uvsrc_y, -8, s->avctx->coded_height >> 1);
492 srcY += src_y * s->linesize + src_x;
493 srcU += uvsrc_y * s->uvlinesize + uvsrc_x;
494 srcV += uvsrc_y * s->uvlinesize + uvsrc_x;
496 /* for grayscale we should not try to read from unknown area */
497 if(s->flags & CODEC_FLAG_GRAY) {
498 srcU = s->edge_emu_buffer + 18 * s->linesize;
499 srcV = s->edge_emu_buffer + 18 * s->linesize;
502 if(v->rangeredfrm || (v->mv_mode == MV_PMODE_INTENSITY_COMP)
503 || (unsigned)(src_x - s->mspel) > s->h_edge_pos - (mx&3) - 16 - s->mspel*3
504 || (unsigned)(src_y - s->mspel) > s->v_edge_pos - (my&3) - 16 - s->mspel*3){
505 uint8_t *uvbuf= s->edge_emu_buffer + 19 * s->linesize;
507 srcY -= s->mspel * (1 + s->linesize);
508 ff_emulated_edge_mc(s->edge_emu_buffer, srcY, s->linesize, 17+s->mspel*2, 17+s->mspel*2,
509 src_x - s->mspel, src_y - s->mspel, s->h_edge_pos, s->v_edge_pos);
510 srcY = s->edge_emu_buffer;
511 ff_emulated_edge_mc(uvbuf , srcU, s->uvlinesize, 8+1, 8+1,
512 uvsrc_x, uvsrc_y, s->h_edge_pos >> 1, s->v_edge_pos >> 1);
513 ff_emulated_edge_mc(uvbuf + 16, srcV, s->uvlinesize, 8+1, 8+1,
514 uvsrc_x, uvsrc_y, s->h_edge_pos >> 1, s->v_edge_pos >> 1);
517 /* if we deal with range reduction we need to scale source blocks */
523 for(j = 0; j < 17 + s->mspel*2; j++) {
524 for(i = 0; i < 17 + s->mspel*2; i++) src[i] = ((src[i] - 128) >> 1) + 128;
527 src = srcU; src2 = srcV;
528 for(j = 0; j < 9; j++) {
529 for(i = 0; i < 9; i++) {
530 src[i] = ((src[i] - 128) >> 1) + 128;
531 src2[i] = ((src2[i] - 128) >> 1) + 128;
533 src += s->uvlinesize;
534 src2 += s->uvlinesize;
537 /* if we deal with intensity compensation we need to scale source blocks */
538 if(v->mv_mode == MV_PMODE_INTENSITY_COMP) {
543 for(j = 0; j < 17 + s->mspel*2; j++) {
544 for(i = 0; i < 17 + s->mspel*2; i++) src[i] = v->luty[src[i]];
547 src = srcU; src2 = srcV;
548 for(j = 0; j < 9; j++) {
549 for(i = 0; i < 9; i++) {
550 src[i] = v->lutuv[src[i]];
551 src2[i] = v->lutuv[src2[i]];
553 src += s->uvlinesize;
554 src2 += s->uvlinesize;
557 srcY += s->mspel * (1 + s->linesize);
561 dxy = ((my & 3) << 2) | (mx & 3);
562 dsp->put_vc1_mspel_pixels_tab[dxy](s->dest[0] , srcY , s->linesize, v->rnd);
563 dsp->put_vc1_mspel_pixels_tab[dxy](s->dest[0] + 8, srcY + 8, s->linesize, v->rnd);
564 srcY += s->linesize * 8;
565 dsp->put_vc1_mspel_pixels_tab[dxy](s->dest[0] + 8 * s->linesize , srcY , s->linesize, v->rnd);
566 dsp->put_vc1_mspel_pixels_tab[dxy](s->dest[0] + 8 * s->linesize + 8, srcY + 8, s->linesize, v->rnd);
567 } else { // hpel mc - always used for luma
568 dxy = (my & 2) | ((mx & 2) >> 1);
571 dsp->put_pixels_tab[0][dxy](s->dest[0], srcY, s->linesize, 16);
573 dsp->put_no_rnd_pixels_tab[0][dxy](s->dest[0], srcY, s->linesize, 16);
576 if(s->flags & CODEC_FLAG_GRAY) return;
577 /* Chroma MC always uses qpel bilinear */
578 uvdxy = ((uvmy & 3) << 2) | (uvmx & 3);
582 dsp->put_h264_chroma_pixels_tab[0](s->dest[1], srcU, s->uvlinesize, 8, uvmx, uvmy);
583 dsp->put_h264_chroma_pixels_tab[0](s->dest[2], srcV, s->uvlinesize, 8, uvmx, uvmy);
585 dsp->put_no_rnd_h264_chroma_pixels_tab[0](s->dest[1], srcU, s->uvlinesize, 8, uvmx, uvmy);
586 dsp->put_no_rnd_h264_chroma_pixels_tab[0](s->dest[2], srcV, s->uvlinesize, 8, uvmx, uvmy);
590 /** Do motion compensation for 4-MV macroblock - luminance block
592 static void vc1_mc_4mv_luma(VC1Context *v, int n)
594 MpegEncContext *s = &v->s;
595 DSPContext *dsp = &v->s.dsp;
597 int dxy, mx, my, src_x, src_y;
600 if(!v->s.last_picture.data[0])return;
603 srcY = s->last_picture.data[0];
605 off = s->linesize * 4 * (n&2) + (n&1) * 8;
607 src_x = s->mb_x * 16 + (n&1) * 8 + (mx >> 2);
608 src_y = s->mb_y * 16 + (n&2) * 4 + (my >> 2);
610 if(v->profile != PROFILE_ADVANCED){
611 src_x = av_clip( src_x, -16, s->mb_width * 16);
612 src_y = av_clip( src_y, -16, s->mb_height * 16);
614 src_x = av_clip( src_x, -17, s->avctx->coded_width);
615 src_y = av_clip( src_y, -18, s->avctx->coded_height + 1);
618 srcY += src_y * s->linesize + src_x;
620 if(v->rangeredfrm || (v->mv_mode == MV_PMODE_INTENSITY_COMP)
621 || (unsigned)(src_x - s->mspel) > s->h_edge_pos - (mx&3) - 8 - s->mspel*2
622 || (unsigned)(src_y - s->mspel) > s->v_edge_pos - (my&3) - 8 - s->mspel*2){
623 srcY -= s->mspel * (1 + s->linesize);
624 ff_emulated_edge_mc(s->edge_emu_buffer, srcY, s->linesize, 9+s->mspel*2, 9+s->mspel*2,
625 src_x - s->mspel, src_y - s->mspel, s->h_edge_pos, s->v_edge_pos);
626 srcY = s->edge_emu_buffer;
627 /* if we deal with range reduction we need to scale source blocks */
633 for(j = 0; j < 9 + s->mspel*2; j++) {
634 for(i = 0; i < 9 + s->mspel*2; i++) src[i] = ((src[i] - 128) >> 1) + 128;
638 /* if we deal with intensity compensation we need to scale source blocks */
639 if(v->mv_mode == MV_PMODE_INTENSITY_COMP) {
644 for(j = 0; j < 9 + s->mspel*2; j++) {
645 for(i = 0; i < 9 + s->mspel*2; i++) src[i] = v->luty[src[i]];
649 srcY += s->mspel * (1 + s->linesize);
653 dxy = ((my & 3) << 2) | (mx & 3);
654 dsp->put_vc1_mspel_pixels_tab[dxy](s->dest[0] + off, srcY, s->linesize, v->rnd);
655 } else { // hpel mc - always used for luma
656 dxy = (my & 2) | ((mx & 2) >> 1);
658 dsp->put_pixels_tab[1][dxy](s->dest[0] + off, srcY, s->linesize, 8);
660 dsp->put_no_rnd_pixels_tab[1][dxy](s->dest[0] + off, srcY, s->linesize, 8);
664 static inline int median4(int a, int b, int c, int d)
667 if(c < d) return (FFMIN(b, d) + FFMAX(a, c)) / 2;
668 else return (FFMIN(b, c) + FFMAX(a, d)) / 2;
670 if(c < d) return (FFMIN(a, d) + FFMAX(b, c)) / 2;
671 else return (FFMIN(a, c) + FFMAX(b, d)) / 2;
676 /** Do motion compensation for 4-MV macroblock - both chroma blocks
678 static void vc1_mc_4mv_chroma(VC1Context *v)
680 MpegEncContext *s = &v->s;
681 DSPContext *dsp = &v->s.dsp;
682 uint8_t *srcU, *srcV;
683 int uvdxy, uvmx, uvmy, uvsrc_x, uvsrc_y;
684 int i, idx, tx = 0, ty = 0;
685 int mvx[4], mvy[4], intra[4];
686 static const int count[16] = { 0, 1, 1, 2, 1, 2, 2, 3, 1, 2, 2, 3, 2, 3, 3, 4};
688 if(!v->s.last_picture.data[0])return;
689 if(s->flags & CODEC_FLAG_GRAY) return;
691 for(i = 0; i < 4; i++) {
692 mvx[i] = s->mv[0][i][0];
693 mvy[i] = s->mv[0][i][1];
694 intra[i] = v->mb_type[0][s->block_index[i]];
697 /* calculate chroma MV vector from four luma MVs */
698 idx = (intra[3] << 3) | (intra[2] << 2) | (intra[1] << 1) | intra[0];
699 if(!idx) { // all blocks are inter
700 tx = median4(mvx[0], mvx[1], mvx[2], mvx[3]);
701 ty = median4(mvy[0], mvy[1], mvy[2], mvy[3]);
702 } else if(count[idx] == 1) { // 3 inter blocks
705 tx = mid_pred(mvx[1], mvx[2], mvx[3]);
706 ty = mid_pred(mvy[1], mvy[2], mvy[3]);
709 tx = mid_pred(mvx[0], mvx[2], mvx[3]);
710 ty = mid_pred(mvy[0], mvy[2], mvy[3]);
713 tx = mid_pred(mvx[0], mvx[1], mvx[3]);
714 ty = mid_pred(mvy[0], mvy[1], mvy[3]);
717 tx = mid_pred(mvx[0], mvx[1], mvx[2]);
718 ty = mid_pred(mvy[0], mvy[1], mvy[2]);
721 } else if(count[idx] == 2) {
723 for(i=0; i<3;i++) if(!intra[i]) {t1 = i; break;}
724 for(i= t1+1; i<4; i++)if(!intra[i]) {t2 = i; break;}
725 tx = (mvx[t1] + mvx[t2]) / 2;
726 ty = (mvy[t1] + mvy[t2]) / 2;
728 s->current_picture.motion_val[1][s->block_index[0]][0] = 0;
729 s->current_picture.motion_val[1][s->block_index[0]][1] = 0;
730 return; //no need to do MC for inter blocks
733 s->current_picture.motion_val[1][s->block_index[0]][0] = tx;
734 s->current_picture.motion_val[1][s->block_index[0]][1] = ty;
735 uvmx = (tx + ((tx&3) == 3)) >> 1;
736 uvmy = (ty + ((ty&3) == 3)) >> 1;
738 uvmx = uvmx + ((uvmx<0)?(uvmx&1):-(uvmx&1));
739 uvmy = uvmy + ((uvmy<0)?(uvmy&1):-(uvmy&1));
742 uvsrc_x = s->mb_x * 8 + (uvmx >> 2);
743 uvsrc_y = s->mb_y * 8 + (uvmy >> 2);
745 if(v->profile != PROFILE_ADVANCED){
746 uvsrc_x = av_clip(uvsrc_x, -8, s->mb_width * 8);
747 uvsrc_y = av_clip(uvsrc_y, -8, s->mb_height * 8);
749 uvsrc_x = av_clip(uvsrc_x, -8, s->avctx->coded_width >> 1);
750 uvsrc_y = av_clip(uvsrc_y, -8, s->avctx->coded_height >> 1);
753 srcU = s->last_picture.data[1] + uvsrc_y * s->uvlinesize + uvsrc_x;
754 srcV = s->last_picture.data[2] + uvsrc_y * s->uvlinesize + uvsrc_x;
755 if(v->rangeredfrm || (v->mv_mode == MV_PMODE_INTENSITY_COMP)
756 || (unsigned)uvsrc_x > (s->h_edge_pos >> 1) - 9
757 || (unsigned)uvsrc_y > (s->v_edge_pos >> 1) - 9){
758 ff_emulated_edge_mc(s->edge_emu_buffer , srcU, s->uvlinesize, 8+1, 8+1,
759 uvsrc_x, uvsrc_y, s->h_edge_pos >> 1, s->v_edge_pos >> 1);
760 ff_emulated_edge_mc(s->edge_emu_buffer + 16, srcV, s->uvlinesize, 8+1, 8+1,
761 uvsrc_x, uvsrc_y, s->h_edge_pos >> 1, s->v_edge_pos >> 1);
762 srcU = s->edge_emu_buffer;
763 srcV = s->edge_emu_buffer + 16;
765 /* if we deal with range reduction we need to scale source blocks */
770 src = srcU; src2 = srcV;
771 for(j = 0; j < 9; j++) {
772 for(i = 0; i < 9; i++) {
773 src[i] = ((src[i] - 128) >> 1) + 128;
774 src2[i] = ((src2[i] - 128) >> 1) + 128;
776 src += s->uvlinesize;
777 src2 += s->uvlinesize;
780 /* if we deal with intensity compensation we need to scale source blocks */
781 if(v->mv_mode == MV_PMODE_INTENSITY_COMP) {
785 src = srcU; src2 = srcV;
786 for(j = 0; j < 9; j++) {
787 for(i = 0; i < 9; i++) {
788 src[i] = v->lutuv[src[i]];
789 src2[i] = v->lutuv[src2[i]];
791 src += s->uvlinesize;
792 src2 += s->uvlinesize;
797 /* Chroma MC always uses qpel bilinear */
798 uvdxy = ((uvmy & 3) << 2) | (uvmx & 3);
802 dsp->put_h264_chroma_pixels_tab[0](s->dest[1], srcU, s->uvlinesize, 8, uvmx, uvmy);
803 dsp->put_h264_chroma_pixels_tab[0](s->dest[2], srcV, s->uvlinesize, 8, uvmx, uvmy);
805 dsp->put_no_rnd_h264_chroma_pixels_tab[0](s->dest[1], srcU, s->uvlinesize, 8, uvmx, uvmy);
806 dsp->put_no_rnd_h264_chroma_pixels_tab[0](s->dest[2], srcV, s->uvlinesize, 8, uvmx, uvmy);
810 static int decode_sequence_header_adv(VC1Context *v, GetBitContext *gb);
813 * Decode Simple/Main Profiles sequence header
814 * @see Figure 7-8, p16-17
815 * @param avctx Codec context
816 * @param gb GetBit context initialized from Codec context extra_data
819 static int decode_sequence_header(AVCodecContext *avctx, GetBitContext *gb)
821 VC1Context *v = avctx->priv_data;
823 av_log(avctx, AV_LOG_DEBUG, "Header: %0X\n", show_bits(gb, 32));
824 v->profile = get_bits(gb, 2);
825 if (v->profile == PROFILE_COMPLEX)
827 av_log(avctx, AV_LOG_ERROR, "WMV3 Complex Profile is not fully supported\n");
830 if (v->profile == PROFILE_ADVANCED)
832 return decode_sequence_header_adv(v, gb);
836 v->res_sm = get_bits(gb, 2); //reserved
839 av_log(avctx, AV_LOG_ERROR,
840 "Reserved RES_SM=%i is forbidden\n", v->res_sm);
846 v->frmrtq_postproc = get_bits(gb, 3); //common
847 // (bitrate-32kbps)/64kbps
848 v->bitrtq_postproc = get_bits(gb, 5); //common
849 v->s.loop_filter = get_bits(gb, 1); //common
850 if(v->s.loop_filter == 1 && v->profile == PROFILE_SIMPLE)
852 av_log(avctx, AV_LOG_ERROR,
853 "LOOPFILTER shell not be enabled in simple profile\n");
856 v->res_x8 = get_bits(gb, 1); //reserved
859 av_log(avctx, AV_LOG_ERROR,
860 "1 for reserved RES_X8 is forbidden\n");
863 v->multires = get_bits(gb, 1);
864 v->res_fasttx = get_bits(gb, 1);
867 av_log(avctx, AV_LOG_ERROR,
868 "0 for reserved RES_FASTTX is forbidden\n");
872 v->fastuvmc = get_bits(gb, 1); //common
873 if (!v->profile && !v->fastuvmc)
875 av_log(avctx, AV_LOG_ERROR,
876 "FASTUVMC unavailable in Simple Profile\n");
879 v->extended_mv = get_bits(gb, 1); //common
880 if (!v->profile && v->extended_mv)
882 av_log(avctx, AV_LOG_ERROR,
883 "Extended MVs unavailable in Simple Profile\n");
886 v->dquant = get_bits(gb, 2); //common
887 v->vstransform = get_bits(gb, 1); //common
889 v->res_transtab = get_bits(gb, 1);
892 av_log(avctx, AV_LOG_ERROR,
893 "1 for reserved RES_TRANSTAB is forbidden\n");
897 v->overlap = get_bits(gb, 1); //common
899 v->s.resync_marker = get_bits(gb, 1);
900 v->rangered = get_bits(gb, 1);
901 if (v->rangered && v->profile == PROFILE_SIMPLE)
903 av_log(avctx, AV_LOG_INFO,
904 "RANGERED should be set to 0 in simple profile\n");
907 v->s.max_b_frames = avctx->max_b_frames = get_bits(gb, 3); //common
908 v->quantizer_mode = get_bits(gb, 2); //common
910 v->finterpflag = get_bits(gb, 1); //common
911 v->res_rtm_flag = get_bits(gb, 1); //reserved
912 if (!v->res_rtm_flag)
914 // av_log(avctx, AV_LOG_ERROR,
915 // "0 for reserved RES_RTM_FLAG is forbidden\n");
916 av_log(avctx, AV_LOG_ERROR,
917 "Old WMV3 version detected, only I-frames will be decoded\n");
920 //TODO: figure out what they mean (always 0x402F)
921 if(!v->res_fasttx) skip_bits(gb, 16);
922 av_log(avctx, AV_LOG_DEBUG,
923 "Profile %i:\nfrmrtq_postproc=%i, bitrtq_postproc=%i\n"
924 "LoopFilter=%i, MultiRes=%i, FastUVMC=%i, Extended MV=%i\n"
925 "Rangered=%i, VSTransform=%i, Overlap=%i, SyncMarker=%i\n"
926 "DQuant=%i, Quantizer mode=%i, Max B frames=%i\n",
927 v->profile, v->frmrtq_postproc, v->bitrtq_postproc,
928 v->s.loop_filter, v->multires, v->fastuvmc, v->extended_mv,
929 v->rangered, v->vstransform, v->overlap, v->s.resync_marker,
930 v->dquant, v->quantizer_mode, avctx->max_b_frames
935 static int decode_sequence_header_adv(VC1Context *v, GetBitContext *gb)
938 v->level = get_bits(gb, 3);
941 av_log(v->s.avctx, AV_LOG_ERROR, "Reserved LEVEL %i\n",v->level);
943 v->chromaformat = get_bits(gb, 2);
944 if (v->chromaformat != 1)
946 av_log(v->s.avctx, AV_LOG_ERROR,
947 "Only 4:2:0 chroma format supported\n");
952 v->frmrtq_postproc = get_bits(gb, 3); //common
953 // (bitrate-32kbps)/64kbps
954 v->bitrtq_postproc = get_bits(gb, 5); //common
955 v->postprocflag = get_bits(gb, 1); //common
957 v->s.avctx->coded_width = (get_bits(gb, 12) + 1) << 1;
958 v->s.avctx->coded_height = (get_bits(gb, 12) + 1) << 1;
959 v->s.avctx->width = v->s.avctx->coded_width;
960 v->s.avctx->height = v->s.avctx->coded_height;
961 v->broadcast = get_bits1(gb);
962 v->interlace = get_bits1(gb);
963 v->tfcntrflag = get_bits1(gb);
964 v->finterpflag = get_bits1(gb);
965 get_bits1(gb); // reserved
967 v->s.h_edge_pos = v->s.avctx->coded_width;
968 v->s.v_edge_pos = v->s.avctx->coded_height;
970 av_log(v->s.avctx, AV_LOG_DEBUG,
971 "Advanced Profile level %i:\nfrmrtq_postproc=%i, bitrtq_postproc=%i\n"
972 "LoopFilter=%i, ChromaFormat=%i, Pulldown=%i, Interlace: %i\n"
973 "TFCTRflag=%i, FINTERPflag=%i\n",
974 v->level, v->frmrtq_postproc, v->bitrtq_postproc,
975 v->s.loop_filter, v->chromaformat, v->broadcast, v->interlace,
976 v->tfcntrflag, v->finterpflag
979 v->psf = get_bits1(gb);
980 if(v->psf) { //PsF, 6.1.13
981 av_log(v->s.avctx, AV_LOG_ERROR, "Progressive Segmented Frame mode: not supported (yet)\n");
984 v->s.max_b_frames = v->s.avctx->max_b_frames = 7;
985 if(get_bits1(gb)) { //Display Info - decoding is not affected by it
987 av_log(v->s.avctx, AV_LOG_DEBUG, "Display extended info:\n");
988 v->s.avctx->width = v->s.width = w = get_bits(gb, 14) + 1;
989 v->s.avctx->height = v->s.height = h = get_bits(gb, 14) + 1;
990 av_log(v->s.avctx, AV_LOG_DEBUG, "Display dimensions: %ix%i\n", w, h);
992 ar = get_bits(gb, 4);
994 v->s.avctx->sample_aspect_ratio = ff_vc1_pixel_aspect[ar];
998 v->s.avctx->sample_aspect_ratio = (AVRational){w, h};
1001 if(get_bits1(gb)){ //framerate stuff
1003 v->s.avctx->time_base.num = 32;
1004 v->s.avctx->time_base.den = get_bits(gb, 16) + 1;
1007 nr = get_bits(gb, 8);
1008 dr = get_bits(gb, 4);
1009 if(nr && nr < 8 && dr && dr < 3){
1010 v->s.avctx->time_base.num = ff_vc1_fps_dr[dr - 1];
1011 v->s.avctx->time_base.den = ff_vc1_fps_nr[nr - 1] * 1000;
1017 v->color_prim = get_bits(gb, 8);
1018 v->transfer_char = get_bits(gb, 8);
1019 v->matrix_coef = get_bits(gb, 8);
1023 v->hrd_param_flag = get_bits1(gb);
1024 if(v->hrd_param_flag) {
1026 v->hrd_num_leaky_buckets = get_bits(gb, 5);
1027 get_bits(gb, 4); //bitrate exponent
1028 get_bits(gb, 4); //buffer size exponent
1029 for(i = 0; i < v->hrd_num_leaky_buckets; i++) {
1030 get_bits(gb, 16); //hrd_rate[n]
1031 get_bits(gb, 16); //hrd_buffer[n]
1037 static int decode_entry_point(AVCodecContext *avctx, GetBitContext *gb)
1039 VC1Context *v = avctx->priv_data;
1040 int i, blink, clentry, refdist;
1042 av_log(avctx, AV_LOG_DEBUG, "Entry point: %08X\n", show_bits_long(gb, 32));
1043 blink = get_bits1(gb); // broken link
1044 clentry = get_bits1(gb); // closed entry
1045 v->panscanflag = get_bits1(gb);
1046 refdist = get_bits1(gb); // refdist flag
1047 v->s.loop_filter = get_bits1(gb);
1048 v->fastuvmc = get_bits1(gb);
1049 v->extended_mv = get_bits1(gb);
1050 v->dquant = get_bits(gb, 2);
1051 v->vstransform = get_bits1(gb);
1052 v->overlap = get_bits1(gb);
1053 v->quantizer_mode = get_bits(gb, 2);
1055 if(v->hrd_param_flag){
1056 for(i = 0; i < v->hrd_num_leaky_buckets; i++) {
1057 get_bits(gb, 8); //hrd_full[n]
1062 avctx->coded_width = (get_bits(gb, 12)+1)<<1;
1063 avctx->coded_height = (get_bits(gb, 12)+1)<<1;
1066 v->extended_dmv = get_bits1(gb);
1068 av_log(avctx, AV_LOG_ERROR, "Luma scaling is not supported, expect wrong picture\n");
1069 skip_bits(gb, 3); // Y range, ignored for now
1072 av_log(avctx, AV_LOG_ERROR, "Chroma scaling is not supported, expect wrong picture\n");
1073 skip_bits(gb, 3); // UV range, ignored for now
1076 av_log(avctx, AV_LOG_DEBUG, "Entry point info:\n"
1077 "BrokenLink=%i, ClosedEntry=%i, PanscanFlag=%i\n"
1078 "RefDist=%i, Postproc=%i, FastUVMC=%i, ExtMV=%i\n"
1079 "DQuant=%i, VSTransform=%i, Overlap=%i, Qmode=%i\n",
1080 blink, clentry, v->panscanflag, refdist, v->s.loop_filter,
1081 v->fastuvmc, v->extended_mv, v->dquant, v->vstransform, v->overlap, v->quantizer_mode);
1086 static int vc1_parse_frame_header(VC1Context *v, GetBitContext* gb)
1088 int pqindex, lowquant, status;
1090 if(v->finterpflag) v->interpfrm = get_bits(gb, 1);
1091 skip_bits(gb, 2); //framecnt unused
1093 if (v->rangered) v->rangeredfrm = get_bits(gb, 1);
1094 v->s.pict_type = get_bits(gb, 1);
1095 if (v->s.avctx->max_b_frames) {
1096 if (!v->s.pict_type) {
1097 if (get_bits(gb, 1)) v->s.pict_type = I_TYPE;
1098 else v->s.pict_type = B_TYPE;
1099 } else v->s.pict_type = P_TYPE;
1100 } else v->s.pict_type = v->s.pict_type ? P_TYPE : I_TYPE;
1103 if(v->s.pict_type == B_TYPE) {
1104 v->bfraction = get_vlc2(gb, ff_vc1_bfraction_vlc.table, VC1_BFRACTION_VLC_BITS, 1);
1105 v->bfraction = ff_vc1_bfraction_lut[v->bfraction];
1106 if(v->bfraction == 0) {
1107 v->s.pict_type = BI_TYPE;
1110 if(v->s.pict_type == I_TYPE || v->s.pict_type == BI_TYPE)
1111 get_bits(gb, 7); // skip buffer fullness
1114 if(v->s.pict_type == I_TYPE || v->s.pict_type == BI_TYPE)
1116 if(v->s.pict_type == P_TYPE)
1119 /* Quantizer stuff */
1120 pqindex = get_bits(gb, 5);
1121 if (v->quantizer_mode == QUANT_FRAME_IMPLICIT)
1122 v->pq = ff_vc1_pquant_table[0][pqindex];
1124 v->pq = ff_vc1_pquant_table[1][pqindex];
1127 if (v->quantizer_mode == QUANT_FRAME_IMPLICIT)
1128 v->pquantizer = pqindex < 9;
1129 if (v->quantizer_mode == QUANT_NON_UNIFORM)
1131 v->pqindex = pqindex;
1132 if (pqindex < 9) v->halfpq = get_bits(gb, 1);
1134 if (v->quantizer_mode == QUANT_FRAME_EXPLICIT)
1135 v->pquantizer = get_bits(gb, 1);
1137 if (v->extended_mv == 1) v->mvrange = get_prefix(gb, 0, 3);
1138 v->k_x = v->mvrange + 9 + (v->mvrange >> 1); //k_x can be 9 10 12 13
1139 v->k_y = v->mvrange + 8; //k_y can be 8 9 10 11
1140 v->range_x = 1 << (v->k_x - 1);
1141 v->range_y = 1 << (v->k_y - 1);
1142 if (v->profile == PROFILE_ADVANCED)
1144 if (v->postprocflag) v->postproc = get_bits(gb, 1);
1147 if (v->multires && v->s.pict_type != B_TYPE) v->respic = get_bits(gb, 2);
1149 if(v->res_x8 && (v->s.pict_type == I_TYPE || v->s.pict_type == BI_TYPE)){
1150 if(get_bits1(gb))return -1;
1152 //av_log(v->s.avctx, AV_LOG_INFO, "%c Frame: QP=[%i]%i (+%i/2) %i\n",
1153 // (v->s.pict_type == P_TYPE) ? 'P' : ((v->s.pict_type == I_TYPE) ? 'I' : 'B'), pqindex, v->pq, v->halfpq, v->rangeredfrm);
1155 if(v->s.pict_type == I_TYPE || v->s.pict_type == P_TYPE) v->use_ic = 0;
1157 switch(v->s.pict_type) {
1159 if (v->pq < 5) v->tt_index = 0;
1160 else if(v->pq < 13) v->tt_index = 1;
1161 else v->tt_index = 2;
1163 lowquant = (v->pq > 12) ? 0 : 1;
1164 v->mv_mode = ff_vc1_mv_pmode_table[lowquant][get_prefix(gb, 1, 4)];
1165 if (v->mv_mode == MV_PMODE_INTENSITY_COMP)
1167 int scale, shift, i;
1168 v->mv_mode2 = ff_vc1_mv_pmode_table2[lowquant][get_prefix(gb, 1, 3)];
1169 v->lumscale = get_bits(gb, 6);
1170 v->lumshift = get_bits(gb, 6);
1172 /* fill lookup tables for intensity compensation */
1175 shift = (255 - v->lumshift * 2) << 6;
1176 if(v->lumshift > 31)
1179 scale = v->lumscale + 32;
1180 if(v->lumshift > 31)
1181 shift = (v->lumshift - 64) << 6;
1183 shift = v->lumshift << 6;
1185 for(i = 0; i < 256; i++) {
1186 v->luty[i] = av_clip_uint8((scale * i + shift + 32) >> 6);
1187 v->lutuv[i] = av_clip_uint8((scale * (i - 128) + 128*64 + 32) >> 6);
1190 if(v->mv_mode == MV_PMODE_1MV_HPEL || v->mv_mode == MV_PMODE_1MV_HPEL_BILIN)
1191 v->s.quarter_sample = 0;
1192 else if(v->mv_mode == MV_PMODE_INTENSITY_COMP) {
1193 if(v->mv_mode2 == MV_PMODE_1MV_HPEL || v->mv_mode2 == MV_PMODE_1MV_HPEL_BILIN)
1194 v->s.quarter_sample = 0;
1196 v->s.quarter_sample = 1;
1198 v->s.quarter_sample = 1;
1199 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));
1201 if ((v->mv_mode == MV_PMODE_INTENSITY_COMP &&
1202 v->mv_mode2 == MV_PMODE_MIXED_MV)
1203 || v->mv_mode == MV_PMODE_MIXED_MV)
1205 status = bitplane_decoding(v->mv_type_mb_plane, &v->mv_type_is_raw, v);
1206 if (status < 0) return -1;
1207 av_log(v->s.avctx, AV_LOG_DEBUG, "MB MV Type plane encoding: "
1208 "Imode: %i, Invert: %i\n", status>>1, status&1);
1210 v->mv_type_is_raw = 0;
1211 memset(v->mv_type_mb_plane, 0, v->s.mb_stride * v->s.mb_height);
1213 status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);
1214 if (status < 0) return -1;
1215 av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: "
1216 "Imode: %i, Invert: %i\n", status>>1, status&1);
1218 /* Hopefully this is correct for P frames */
1219 v->s.mv_table_index = get_bits(gb, 2); //but using ff_vc1_ tables
1220 v->cbpcy_vlc = &ff_vc1_cbpcy_p_vlc[get_bits(gb, 2)];
1224 av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");
1225 vop_dquant_decoding(v);
1228 v->ttfrm = 0; //FIXME Is that so ?
1231 v->ttmbf = get_bits(gb, 1);
1234 v->ttfrm = ff_vc1_ttfrm_to_tt[get_bits(gb, 2)];
1242 if (v->pq < 5) v->tt_index = 0;
1243 else if(v->pq < 13) v->tt_index = 1;
1244 else v->tt_index = 2;
1246 lowquant = (v->pq > 12) ? 0 : 1;
1247 v->mv_mode = get_bits1(gb) ? MV_PMODE_1MV : MV_PMODE_1MV_HPEL_BILIN;
1248 v->s.quarter_sample = (v->mv_mode == MV_PMODE_1MV);
1249 v->s.mspel = v->s.quarter_sample;
1251 status = bitplane_decoding(v->direct_mb_plane, &v->dmb_is_raw, v);
1252 if (status < 0) return -1;
1253 av_log(v->s.avctx, AV_LOG_DEBUG, "MB Direct Type plane encoding: "
1254 "Imode: %i, Invert: %i\n", status>>1, status&1);
1255 status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);
1256 if (status < 0) return -1;
1257 av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: "
1258 "Imode: %i, Invert: %i\n", status>>1, status&1);
1260 v->s.mv_table_index = get_bits(gb, 2);
1261 v->cbpcy_vlc = &ff_vc1_cbpcy_p_vlc[get_bits(gb, 2)];
1265 av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");
1266 vop_dquant_decoding(v);
1272 v->ttmbf = get_bits(gb, 1);
1275 v->ttfrm = ff_vc1_ttfrm_to_tt[get_bits(gb, 2)];
1285 v->c_ac_table_index = decode012(gb);
1286 if (v->s.pict_type == I_TYPE || v->s.pict_type == BI_TYPE)
1288 v->y_ac_table_index = decode012(gb);
1291 v->s.dc_table_index = get_bits(gb, 1);
1293 if(v->s.pict_type == BI_TYPE) {
1294 v->s.pict_type = B_TYPE;
1300 static int vc1_parse_frame_header_adv(VC1Context *v, GetBitContext* gb)
1302 int pqindex, lowquant;
1305 v->p_frame_skipped = 0;
1308 v->fcm = decode012(gb);
1309 if(v->fcm) return -1; // interlaced frames/fields are not implemented
1311 switch(get_prefix(gb, 0, 4)) {
1313 v->s.pict_type = P_TYPE;
1316 v->s.pict_type = B_TYPE;
1319 v->s.pict_type = I_TYPE;
1322 v->s.pict_type = BI_TYPE;
1325 v->s.pict_type = P_TYPE; // skipped pic
1326 v->p_frame_skipped = 1;
1332 if(!v->interlace || v->psf) {
1333 v->rptfrm = get_bits(gb, 2);
1335 v->tff = get_bits1(gb);
1336 v->rptfrm = get_bits1(gb);
1339 if(v->panscanflag) {
1342 v->rnd = get_bits1(gb);
1344 v->uvsamp = get_bits1(gb);
1345 if(v->finterpflag) v->interpfrm = get_bits(gb, 1);
1346 if(v->s.pict_type == B_TYPE) {
1347 v->bfraction = get_vlc2(gb, ff_vc1_bfraction_vlc.table, VC1_BFRACTION_VLC_BITS, 1);
1348 v->bfraction = ff_vc1_bfraction_lut[v->bfraction];
1349 if(v->bfraction == 0) {
1350 v->s.pict_type = BI_TYPE; /* XXX: should not happen here */
1353 pqindex = get_bits(gb, 5);
1354 v->pqindex = pqindex;
1355 if (v->quantizer_mode == QUANT_FRAME_IMPLICIT)
1356 v->pq = ff_vc1_pquant_table[0][pqindex];
1358 v->pq = ff_vc1_pquant_table[1][pqindex];
1361 if (v->quantizer_mode == QUANT_FRAME_IMPLICIT)
1362 v->pquantizer = pqindex < 9;
1363 if (v->quantizer_mode == QUANT_NON_UNIFORM)
1365 v->pqindex = pqindex;
1366 if (pqindex < 9) v->halfpq = get_bits(gb, 1);
1368 if (v->quantizer_mode == QUANT_FRAME_EXPLICIT)
1369 v->pquantizer = get_bits(gb, 1);
1371 if(v->s.pict_type == I_TYPE || v->s.pict_type == P_TYPE) v->use_ic = 0;
1373 switch(v->s.pict_type) {
1376 status = bitplane_decoding(v->acpred_plane, &v->acpred_is_raw, v);
1377 if (status < 0) return -1;
1378 av_log(v->s.avctx, AV_LOG_DEBUG, "ACPRED plane encoding: "
1379 "Imode: %i, Invert: %i\n", status>>1, status&1);
1380 v->condover = CONDOVER_NONE;
1381 if(v->overlap && v->pq <= 8) {
1382 v->condover = decode012(gb);
1383 if(v->condover == CONDOVER_SELECT) {
1384 status = bitplane_decoding(v->over_flags_plane, &v->overflg_is_raw, v);
1385 if (status < 0) return -1;
1386 av_log(v->s.avctx, AV_LOG_DEBUG, "CONDOVER plane encoding: "
1387 "Imode: %i, Invert: %i\n", status>>1, status&1);
1393 v->postproc = get_bits1(gb);
1394 if (v->extended_mv) v->mvrange = get_prefix(gb, 0, 3);
1395 else v->mvrange = 0;
1396 v->k_x = v->mvrange + 9 + (v->mvrange >> 1); //k_x can be 9 10 12 13
1397 v->k_y = v->mvrange + 8; //k_y can be 8 9 10 11
1398 v->range_x = 1 << (v->k_x - 1);
1399 v->range_y = 1 << (v->k_y - 1);
1401 if (v->pq < 5) v->tt_index = 0;
1402 else if(v->pq < 13) v->tt_index = 1;
1403 else v->tt_index = 2;
1405 lowquant = (v->pq > 12) ? 0 : 1;
1406 v->mv_mode = ff_vc1_mv_pmode_table[lowquant][get_prefix(gb, 1, 4)];
1407 if (v->mv_mode == MV_PMODE_INTENSITY_COMP)
1409 int scale, shift, i;
1410 v->mv_mode2 = ff_vc1_mv_pmode_table2[lowquant][get_prefix(gb, 1, 3)];
1411 v->lumscale = get_bits(gb, 6);
1412 v->lumshift = get_bits(gb, 6);
1413 /* fill lookup tables for intensity compensation */
1416 shift = (255 - v->lumshift * 2) << 6;
1417 if(v->lumshift > 31)
1420 scale = v->lumscale + 32;
1421 if(v->lumshift > 31)
1422 shift = (v->lumshift - 64) << 6;
1424 shift = v->lumshift << 6;
1426 for(i = 0; i < 256; i++) {
1427 v->luty[i] = av_clip_uint8((scale * i + shift + 32) >> 6);
1428 v->lutuv[i] = av_clip_uint8((scale * (i - 128) + 128*64 + 32) >> 6);
1432 if(v->mv_mode == MV_PMODE_1MV_HPEL || v->mv_mode == MV_PMODE_1MV_HPEL_BILIN)
1433 v->s.quarter_sample = 0;
1434 else if(v->mv_mode == MV_PMODE_INTENSITY_COMP) {
1435 if(v->mv_mode2 == MV_PMODE_1MV_HPEL || v->mv_mode2 == MV_PMODE_1MV_HPEL_BILIN)
1436 v->s.quarter_sample = 0;
1438 v->s.quarter_sample = 1;
1440 v->s.quarter_sample = 1;
1441 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));
1443 if ((v->mv_mode == MV_PMODE_INTENSITY_COMP &&
1444 v->mv_mode2 == MV_PMODE_MIXED_MV)
1445 || v->mv_mode == MV_PMODE_MIXED_MV)
1447 status = bitplane_decoding(v->mv_type_mb_plane, &v->mv_type_is_raw, v);
1448 if (status < 0) return -1;
1449 av_log(v->s.avctx, AV_LOG_DEBUG, "MB MV Type plane encoding: "
1450 "Imode: %i, Invert: %i\n", status>>1, status&1);
1452 v->mv_type_is_raw = 0;
1453 memset(v->mv_type_mb_plane, 0, v->s.mb_stride * v->s.mb_height);
1455 status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);
1456 if (status < 0) return -1;
1457 av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: "
1458 "Imode: %i, Invert: %i\n", status>>1, status&1);
1460 /* Hopefully this is correct for P frames */
1461 v->s.mv_table_index = get_bits(gb, 2); //but using ff_vc1_ tables
1462 v->cbpcy_vlc = &ff_vc1_cbpcy_p_vlc[get_bits(gb, 2)];
1465 av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");
1466 vop_dquant_decoding(v);
1469 v->ttfrm = 0; //FIXME Is that so ?
1472 v->ttmbf = get_bits(gb, 1);
1475 v->ttfrm = ff_vc1_ttfrm_to_tt[get_bits(gb, 2)];
1484 v->postproc = get_bits1(gb);
1485 if (v->extended_mv) v->mvrange = get_prefix(gb, 0, 3);
1486 else v->mvrange = 0;
1487 v->k_x = v->mvrange + 9 + (v->mvrange >> 1); //k_x can be 9 10 12 13
1488 v->k_y = v->mvrange + 8; //k_y can be 8 9 10 11
1489 v->range_x = 1 << (v->k_x - 1);
1490 v->range_y = 1 << (v->k_y - 1);
1492 if (v->pq < 5) v->tt_index = 0;
1493 else if(v->pq < 13) v->tt_index = 1;
1494 else v->tt_index = 2;
1496 lowquant = (v->pq > 12) ? 0 : 1;
1497 v->mv_mode = get_bits1(gb) ? MV_PMODE_1MV : MV_PMODE_1MV_HPEL_BILIN;
1498 v->s.quarter_sample = (v->mv_mode == MV_PMODE_1MV);
1499 v->s.mspel = v->s.quarter_sample;
1501 status = bitplane_decoding(v->direct_mb_plane, &v->dmb_is_raw, v);
1502 if (status < 0) return -1;
1503 av_log(v->s.avctx, AV_LOG_DEBUG, "MB Direct Type plane encoding: "
1504 "Imode: %i, Invert: %i\n", status>>1, status&1);
1505 status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);
1506 if (status < 0) return -1;
1507 av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: "
1508 "Imode: %i, Invert: %i\n", status>>1, status&1);
1510 v->s.mv_table_index = get_bits(gb, 2);
1511 v->cbpcy_vlc = &ff_vc1_cbpcy_p_vlc[get_bits(gb, 2)];
1515 av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");
1516 vop_dquant_decoding(v);
1522 v->ttmbf = get_bits(gb, 1);
1525 v->ttfrm = ff_vc1_ttfrm_to_tt[get_bits(gb, 2)];
1535 v->c_ac_table_index = decode012(gb);
1536 if (v->s.pict_type == I_TYPE || v->s.pict_type == BI_TYPE)
1538 v->y_ac_table_index = decode012(gb);
1541 v->s.dc_table_index = get_bits(gb, 1);
1542 if ((v->s.pict_type == I_TYPE || v->s.pict_type == BI_TYPE) && v->dquant) {
1543 av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");
1544 vop_dquant_decoding(v);
1548 if(v->s.pict_type == BI_TYPE) {
1549 v->s.pict_type = B_TYPE;
1555 /***********************************************************************/
1557 * @defgroup block VC-1 Block-level functions
1558 * @see 7.1.4, p91 and 8.1.1.7, p(1)04
1564 * @brief Get macroblock-level quantizer scale
1566 #define GET_MQUANT() \
1570 if (v->dqprofile == DQPROFILE_ALL_MBS) \
1574 mquant = (get_bits(gb, 1)) ? v->altpq : v->pq; \
1578 mqdiff = get_bits(gb, 3); \
1579 if (mqdiff != 7) mquant = v->pq + mqdiff; \
1580 else mquant = get_bits(gb, 5); \
1583 if(v->dqprofile == DQPROFILE_SINGLE_EDGE) \
1584 edges = 1 << v->dqsbedge; \
1585 else if(v->dqprofile == DQPROFILE_DOUBLE_EDGES) \
1586 edges = (3 << v->dqsbedge) % 15; \
1587 else if(v->dqprofile == DQPROFILE_FOUR_EDGES) \
1589 if((edges&1) && !s->mb_x) \
1590 mquant = v->altpq; \
1591 if((edges&2) && s->first_slice_line) \
1592 mquant = v->altpq; \
1593 if((edges&4) && s->mb_x == (s->mb_width - 1)) \
1594 mquant = v->altpq; \
1595 if((edges&8) && s->mb_y == (s->mb_height - 1)) \
1596 mquant = v->altpq; \
1600 * @def GET_MVDATA(_dmv_x, _dmv_y)
1601 * @brief Get MV differentials
1602 * @see MVDATA decoding from 8.3.5.2, p(1)20
1603 * @param _dmv_x Horizontal differential for decoded MV
1604 * @param _dmv_y Vertical differential for decoded MV
1606 #define GET_MVDATA(_dmv_x, _dmv_y) \
1607 index = 1 + get_vlc2(gb, ff_vc1_mv_diff_vlc[s->mv_table_index].table,\
1608 VC1_MV_DIFF_VLC_BITS, 2); \
1611 mb_has_coeffs = 1; \
1614 else mb_has_coeffs = 0; \
1616 if (!index) { _dmv_x = _dmv_y = 0; } \
1617 else if (index == 35) \
1619 _dmv_x = get_bits(gb, v->k_x - 1 + s->quarter_sample); \
1620 _dmv_y = get_bits(gb, v->k_y - 1 + s->quarter_sample); \
1622 else if (index == 36) \
1631 if (!s->quarter_sample && index1 == 5) val = 1; \
1633 if(size_table[index1] - val > 0) \
1634 val = get_bits(gb, size_table[index1] - val); \
1636 sign = 0 - (val&1); \
1637 _dmv_x = (sign ^ ((val>>1) + offset_table[index1])) - sign; \
1640 if (!s->quarter_sample && index1 == 5) val = 1; \
1642 if(size_table[index1] - val > 0) \
1643 val = get_bits(gb, size_table[index1] - val); \
1645 sign = 0 - (val&1); \
1646 _dmv_y = (sign ^ ((val>>1) + offset_table[index1])) - sign; \
1649 /** Predict and set motion vector
1651 static inline void vc1_pred_mv(MpegEncContext *s, int n, int dmv_x, int dmv_y, int mv1, int r_x, int r_y, uint8_t* is_intra)
1653 int xy, wrap, off = 0;
1658 /* scale MV difference to be quad-pel */
1659 dmv_x <<= 1 - s->quarter_sample;
1660 dmv_y <<= 1 - s->quarter_sample;
1662 wrap = s->b8_stride;
1663 xy = s->block_index[n];
1666 s->mv[0][n][0] = s->current_picture.motion_val[0][xy][0] = 0;
1667 s->mv[0][n][1] = s->current_picture.motion_val[0][xy][1] = 0;
1668 s->current_picture.motion_val[1][xy][0] = 0;
1669 s->current_picture.motion_val[1][xy][1] = 0;
1670 if(mv1) { /* duplicate motion data for 1-MV block */
1671 s->current_picture.motion_val[0][xy + 1][0] = 0;
1672 s->current_picture.motion_val[0][xy + 1][1] = 0;
1673 s->current_picture.motion_val[0][xy + wrap][0] = 0;
1674 s->current_picture.motion_val[0][xy + wrap][1] = 0;
1675 s->current_picture.motion_val[0][xy + wrap + 1][0] = 0;
1676 s->current_picture.motion_val[0][xy + wrap + 1][1] = 0;
1677 s->current_picture.motion_val[1][xy + 1][0] = 0;
1678 s->current_picture.motion_val[1][xy + 1][1] = 0;
1679 s->current_picture.motion_val[1][xy + wrap][0] = 0;
1680 s->current_picture.motion_val[1][xy + wrap][1] = 0;
1681 s->current_picture.motion_val[1][xy + wrap + 1][0] = 0;
1682 s->current_picture.motion_val[1][xy + wrap + 1][1] = 0;
1687 C = s->current_picture.motion_val[0][xy - 1];
1688 A = s->current_picture.motion_val[0][xy - wrap];
1690 off = (s->mb_x == (s->mb_width - 1)) ? -1 : 2;
1692 //in 4-MV mode different blocks have different B predictor position
1695 off = (s->mb_x > 0) ? -1 : 1;
1698 off = (s->mb_x == (s->mb_width - 1)) ? -1 : 1;
1707 B = s->current_picture.motion_val[0][xy - wrap + off];
1709 if(!s->first_slice_line || (n==2 || n==3)) { // predictor A is not out of bounds
1710 if(s->mb_width == 1) {
1714 px = mid_pred(A[0], B[0], C[0]);
1715 py = mid_pred(A[1], B[1], C[1]);
1717 } else if(s->mb_x || (n==1 || n==3)) { // predictor C is not out of bounds
1723 /* Pullback MV as specified in 8.3.5.3.4 */
1726 qx = (s->mb_x << 6) + ((n==1 || n==3) ? 32 : 0);
1727 qy = (s->mb_y << 6) + ((n==2 || n==3) ? 32 : 0);
1728 X = (s->mb_width << 6) - 4;
1729 Y = (s->mb_height << 6) - 4;
1731 if(qx + px < -60) px = -60 - qx;
1732 if(qy + py < -60) py = -60 - qy;
1734 if(qx + px < -28) px = -28 - qx;
1735 if(qy + py < -28) py = -28 - qy;
1737 if(qx + px > X) px = X - qx;
1738 if(qy + py > Y) py = Y - qy;
1740 /* Calculate hybrid prediction as specified in 8.3.5.3.5 */
1741 if((!s->first_slice_line || (n==2 || n==3)) && (s->mb_x || (n==1 || n==3))) {
1742 if(is_intra[xy - wrap])
1743 sum = FFABS(px) + FFABS(py);
1745 sum = FFABS(px - A[0]) + FFABS(py - A[1]);
1747 if(get_bits1(&s->gb)) {
1755 if(is_intra[xy - 1])
1756 sum = FFABS(px) + FFABS(py);
1758 sum = FFABS(px - C[0]) + FFABS(py - C[1]);
1760 if(get_bits1(&s->gb)) {
1770 /* store MV using signed modulus of MV range defined in 4.11 */
1771 s->mv[0][n][0] = s->current_picture.motion_val[0][xy][0] = ((px + dmv_x + r_x) & ((r_x << 1) - 1)) - r_x;
1772 s->mv[0][n][1] = s->current_picture.motion_val[0][xy][1] = ((py + dmv_y + r_y) & ((r_y << 1) - 1)) - r_y;
1773 if(mv1) { /* duplicate motion data for 1-MV block */
1774 s->current_picture.motion_val[0][xy + 1][0] = s->current_picture.motion_val[0][xy][0];
1775 s->current_picture.motion_val[0][xy + 1][1] = s->current_picture.motion_val[0][xy][1];
1776 s->current_picture.motion_val[0][xy + wrap][0] = s->current_picture.motion_val[0][xy][0];
1777 s->current_picture.motion_val[0][xy + wrap][1] = s->current_picture.motion_val[0][xy][1];
1778 s->current_picture.motion_val[0][xy + wrap + 1][0] = s->current_picture.motion_val[0][xy][0];
1779 s->current_picture.motion_val[0][xy + wrap + 1][1] = s->current_picture.motion_val[0][xy][1];
1783 /** Motion compensation for direct or interpolated blocks in B-frames
1785 static void vc1_interp_mc(VC1Context *v)
1787 MpegEncContext *s = &v->s;
1788 DSPContext *dsp = &v->s.dsp;
1789 uint8_t *srcY, *srcU, *srcV;
1790 int dxy, uvdxy, mx, my, uvmx, uvmy, src_x, src_y, uvsrc_x, uvsrc_y;
1792 if(!v->s.next_picture.data[0])return;
1794 mx = s->mv[1][0][0];
1795 my = s->mv[1][0][1];
1796 uvmx = (mx + ((mx & 3) == 3)) >> 1;
1797 uvmy = (my + ((my & 3) == 3)) >> 1;
1799 uvmx = uvmx + ((uvmx<0)?-(uvmx&1):(uvmx&1));
1800 uvmy = uvmy + ((uvmy<0)?-(uvmy&1):(uvmy&1));
1802 srcY = s->next_picture.data[0];
1803 srcU = s->next_picture.data[1];
1804 srcV = s->next_picture.data[2];
1806 src_x = s->mb_x * 16 + (mx >> 2);
1807 src_y = s->mb_y * 16 + (my >> 2);
1808 uvsrc_x = s->mb_x * 8 + (uvmx >> 2);
1809 uvsrc_y = s->mb_y * 8 + (uvmy >> 2);
1811 if(v->profile != PROFILE_ADVANCED){
1812 src_x = av_clip( src_x, -16, s->mb_width * 16);
1813 src_y = av_clip( src_y, -16, s->mb_height * 16);
1814 uvsrc_x = av_clip(uvsrc_x, -8, s->mb_width * 8);
1815 uvsrc_y = av_clip(uvsrc_y, -8, s->mb_height * 8);
1817 src_x = av_clip( src_x, -17, s->avctx->coded_width);
1818 src_y = av_clip( src_y, -18, s->avctx->coded_height + 1);
1819 uvsrc_x = av_clip(uvsrc_x, -8, s->avctx->coded_width >> 1);
1820 uvsrc_y = av_clip(uvsrc_y, -8, s->avctx->coded_height >> 1);
1823 srcY += src_y * s->linesize + src_x;
1824 srcU += uvsrc_y * s->uvlinesize + uvsrc_x;
1825 srcV += uvsrc_y * s->uvlinesize + uvsrc_x;
1827 /* for grayscale we should not try to read from unknown area */
1828 if(s->flags & CODEC_FLAG_GRAY) {
1829 srcU = s->edge_emu_buffer + 18 * s->linesize;
1830 srcV = s->edge_emu_buffer + 18 * s->linesize;
1834 || (unsigned)src_x > s->h_edge_pos - (mx&3) - 16
1835 || (unsigned)src_y > s->v_edge_pos - (my&3) - 16){
1836 uint8_t *uvbuf= s->edge_emu_buffer + 19 * s->linesize;
1838 srcY -= s->mspel * (1 + s->linesize);
1839 ff_emulated_edge_mc(s->edge_emu_buffer, srcY, s->linesize, 17+s->mspel*2, 17+s->mspel*2,
1840 src_x - s->mspel, src_y - s->mspel, s->h_edge_pos, s->v_edge_pos);
1841 srcY = s->edge_emu_buffer;
1842 ff_emulated_edge_mc(uvbuf , srcU, s->uvlinesize, 8+1, 8+1,
1843 uvsrc_x, uvsrc_y, s->h_edge_pos >> 1, s->v_edge_pos >> 1);
1844 ff_emulated_edge_mc(uvbuf + 16, srcV, s->uvlinesize, 8+1, 8+1,
1845 uvsrc_x, uvsrc_y, s->h_edge_pos >> 1, s->v_edge_pos >> 1);
1848 /* if we deal with range reduction we need to scale source blocks */
1849 if(v->rangeredfrm) {
1851 uint8_t *src, *src2;
1854 for(j = 0; j < 17 + s->mspel*2; j++) {
1855 for(i = 0; i < 17 + s->mspel*2; i++) src[i] = ((src[i] - 128) >> 1) + 128;
1858 src = srcU; src2 = srcV;
1859 for(j = 0; j < 9; j++) {
1860 for(i = 0; i < 9; i++) {
1861 src[i] = ((src[i] - 128) >> 1) + 128;
1862 src2[i] = ((src2[i] - 128) >> 1) + 128;
1864 src += s->uvlinesize;
1865 src2 += s->uvlinesize;
1868 srcY += s->mspel * (1 + s->linesize);
1873 dxy = ((my & 1) << 1) | (mx & 1);
1875 dsp->avg_pixels_tab[0][dxy](s->dest[0], srcY, s->linesize, 16);
1877 if(s->flags & CODEC_FLAG_GRAY) return;
1878 /* Chroma MC always uses qpel blilinear */
1879 uvdxy = ((uvmy & 3) << 2) | (uvmx & 3);
1882 dsp->avg_h264_chroma_pixels_tab[0](s->dest[1], srcU, s->uvlinesize, 8, uvmx, uvmy);
1883 dsp->avg_h264_chroma_pixels_tab[0](s->dest[2], srcV, s->uvlinesize, 8, uvmx, uvmy);
1886 static av_always_inline int scale_mv(int value, int bfrac, int inv, int qs)
1890 #if B_FRACTION_DEN==256
1894 return 2 * ((value * n + 255) >> 9);
1895 return (value * n + 128) >> 8;
1898 n -= B_FRACTION_DEN;
1900 return 2 * ((value * n + B_FRACTION_DEN - 1) / (2 * B_FRACTION_DEN));
1901 return (value * n + B_FRACTION_DEN/2) / B_FRACTION_DEN;
1905 /** Reconstruct motion vector for B-frame and do motion compensation
1907 static inline void vc1_b_mc(VC1Context *v, int dmv_x[2], int dmv_y[2], int direct, int mode)
1910 v->mv_mode2 = v->mv_mode;
1911 v->mv_mode = MV_PMODE_INTENSITY_COMP;
1916 if(v->use_ic) v->mv_mode = v->mv_mode2;
1919 if(mode == BMV_TYPE_INTERPOLATED) {
1922 if(v->use_ic) v->mv_mode = v->mv_mode2;
1926 if(v->use_ic && (mode == BMV_TYPE_BACKWARD)) v->mv_mode = v->mv_mode2;
1927 vc1_mc_1mv(v, (mode == BMV_TYPE_BACKWARD));
1928 if(v->use_ic) v->mv_mode = v->mv_mode2;
1931 static inline void vc1_pred_b_mv(VC1Context *v, int dmv_x[2], int dmv_y[2], int direct, int mvtype)
1933 MpegEncContext *s = &v->s;
1934 int xy, wrap, off = 0;
1939 const uint8_t *is_intra = v->mb_type[0];
1943 /* scale MV difference to be quad-pel */
1944 dmv_x[0] <<= 1 - s->quarter_sample;
1945 dmv_y[0] <<= 1 - s->quarter_sample;
1946 dmv_x[1] <<= 1 - s->quarter_sample;
1947 dmv_y[1] <<= 1 - s->quarter_sample;
1949 wrap = s->b8_stride;
1950 xy = s->block_index[0];
1953 s->current_picture.motion_val[0][xy][0] =
1954 s->current_picture.motion_val[0][xy][1] =
1955 s->current_picture.motion_val[1][xy][0] =
1956 s->current_picture.motion_val[1][xy][1] = 0;
1959 s->mv[0][0][0] = scale_mv(s->next_picture.motion_val[1][xy][0], v->bfraction, 0, s->quarter_sample);
1960 s->mv[0][0][1] = scale_mv(s->next_picture.motion_val[1][xy][1], v->bfraction, 0, s->quarter_sample);
1961 s->mv[1][0][0] = scale_mv(s->next_picture.motion_val[1][xy][0], v->bfraction, 1, s->quarter_sample);
1962 s->mv[1][0][1] = scale_mv(s->next_picture.motion_val[1][xy][1], v->bfraction, 1, s->quarter_sample);
1964 /* Pullback predicted motion vectors as specified in 8.4.5.4 */
1965 s->mv[0][0][0] = av_clip(s->mv[0][0][0], -60 - (s->mb_x << 6), (s->mb_width << 6) - 4 - (s->mb_x << 6));
1966 s->mv[0][0][1] = av_clip(s->mv[0][0][1], -60 - (s->mb_y << 6), (s->mb_height << 6) - 4 - (s->mb_y << 6));
1967 s->mv[1][0][0] = av_clip(s->mv[1][0][0], -60 - (s->mb_x << 6), (s->mb_width << 6) - 4 - (s->mb_x << 6));
1968 s->mv[1][0][1] = av_clip(s->mv[1][0][1], -60 - (s->mb_y << 6), (s->mb_height << 6) - 4 - (s->mb_y << 6));
1970 s->current_picture.motion_val[0][xy][0] = s->mv[0][0][0];
1971 s->current_picture.motion_val[0][xy][1] = s->mv[0][0][1];
1972 s->current_picture.motion_val[1][xy][0] = s->mv[1][0][0];
1973 s->current_picture.motion_val[1][xy][1] = s->mv[1][0][1];
1977 if((mvtype == BMV_TYPE_FORWARD) || (mvtype == BMV_TYPE_INTERPOLATED)) {
1978 C = s->current_picture.motion_val[0][xy - 2];
1979 A = s->current_picture.motion_val[0][xy - wrap*2];
1980 off = (s->mb_x == (s->mb_width - 1)) ? -2 : 2;
1981 B = s->current_picture.motion_val[0][xy - wrap*2 + off];
1983 if(!s->mb_x) C[0] = C[1] = 0;
1984 if(!s->first_slice_line) { // predictor A is not out of bounds
1985 if(s->mb_width == 1) {
1989 px = mid_pred(A[0], B[0], C[0]);
1990 py = mid_pred(A[1], B[1], C[1]);
1992 } else if(s->mb_x) { // predictor C is not out of bounds
1998 /* Pullback MV as specified in 8.3.5.3.4 */
2001 if(v->profile < PROFILE_ADVANCED) {
2002 qx = (s->mb_x << 5);
2003 qy = (s->mb_y << 5);
2004 X = (s->mb_width << 5) - 4;
2005 Y = (s->mb_height << 5) - 4;
2006 if(qx + px < -28) px = -28 - qx;
2007 if(qy + py < -28) py = -28 - qy;
2008 if(qx + px > X) px = X - qx;
2009 if(qy + py > Y) py = Y - qy;
2011 qx = (s->mb_x << 6);
2012 qy = (s->mb_y << 6);
2013 X = (s->mb_width << 6) - 4;
2014 Y = (s->mb_height << 6) - 4;
2015 if(qx + px < -60) px = -60 - qx;
2016 if(qy + py < -60) py = -60 - qy;
2017 if(qx + px > X) px = X - qx;
2018 if(qy + py > Y) py = Y - qy;
2021 /* Calculate hybrid prediction as specified in 8.3.5.3.5 */
2022 if(0 && !s->first_slice_line && s->mb_x) {
2023 if(is_intra[xy - wrap])
2024 sum = FFABS(px) + FFABS(py);
2026 sum = FFABS(px - A[0]) + FFABS(py - A[1]);
2028 if(get_bits1(&s->gb)) {
2036 if(is_intra[xy - 2])
2037 sum = FFABS(px) + FFABS(py);
2039 sum = FFABS(px - C[0]) + FFABS(py - C[1]);
2041 if(get_bits1(&s->gb)) {
2051 /* store MV using signed modulus of MV range defined in 4.11 */
2052 s->mv[0][0][0] = ((px + dmv_x[0] + r_x) & ((r_x << 1) - 1)) - r_x;
2053 s->mv[0][0][1] = ((py + dmv_y[0] + r_y) & ((r_y << 1) - 1)) - r_y;
2055 if((mvtype == BMV_TYPE_BACKWARD) || (mvtype == BMV_TYPE_INTERPOLATED)) {
2056 C = s->current_picture.motion_val[1][xy - 2];
2057 A = s->current_picture.motion_val[1][xy - wrap*2];
2058 off = (s->mb_x == (s->mb_width - 1)) ? -2 : 2;
2059 B = s->current_picture.motion_val[1][xy - wrap*2 + off];
2061 if(!s->mb_x) C[0] = C[1] = 0;
2062 if(!s->first_slice_line) { // predictor A is not out of bounds
2063 if(s->mb_width == 1) {
2067 px = mid_pred(A[0], B[0], C[0]);
2068 py = mid_pred(A[1], B[1], C[1]);
2070 } else if(s->mb_x) { // predictor C is not out of bounds
2076 /* Pullback MV as specified in 8.3.5.3.4 */
2079 if(v->profile < PROFILE_ADVANCED) {
2080 qx = (s->mb_x << 5);
2081 qy = (s->mb_y << 5);
2082 X = (s->mb_width << 5) - 4;
2083 Y = (s->mb_height << 5) - 4;
2084 if(qx + px < -28) px = -28 - qx;
2085 if(qy + py < -28) py = -28 - qy;
2086 if(qx + px > X) px = X - qx;
2087 if(qy + py > Y) py = Y - qy;
2089 qx = (s->mb_x << 6);
2090 qy = (s->mb_y << 6);
2091 X = (s->mb_width << 6) - 4;
2092 Y = (s->mb_height << 6) - 4;
2093 if(qx + px < -60) px = -60 - qx;
2094 if(qy + py < -60) py = -60 - qy;
2095 if(qx + px > X) px = X - qx;
2096 if(qy + py > Y) py = Y - qy;
2099 /* Calculate hybrid prediction as specified in 8.3.5.3.5 */
2100 if(0 && !s->first_slice_line && s->mb_x) {
2101 if(is_intra[xy - wrap])
2102 sum = FFABS(px) + FFABS(py);
2104 sum = FFABS(px - A[0]) + FFABS(py - A[1]);
2106 if(get_bits1(&s->gb)) {
2114 if(is_intra[xy - 2])
2115 sum = FFABS(px) + FFABS(py);
2117 sum = FFABS(px - C[0]) + FFABS(py - C[1]);
2119 if(get_bits1(&s->gb)) {
2129 /* store MV using signed modulus of MV range defined in 4.11 */
2131 s->mv[1][0][0] = ((px + dmv_x[1] + r_x) & ((r_x << 1) - 1)) - r_x;
2132 s->mv[1][0][1] = ((py + dmv_y[1] + r_y) & ((r_y << 1) - 1)) - r_y;
2134 s->current_picture.motion_val[0][xy][0] = s->mv[0][0][0];
2135 s->current_picture.motion_val[0][xy][1] = s->mv[0][0][1];
2136 s->current_picture.motion_val[1][xy][0] = s->mv[1][0][0];
2137 s->current_picture.motion_val[1][xy][1] = s->mv[1][0][1];
2140 /** Get predicted DC value for I-frames only
2141 * prediction dir: left=0, top=1
2142 * @param s MpegEncContext
2143 * @param[in] n block index in the current MB
2144 * @param dc_val_ptr Pointer to DC predictor
2145 * @param dir_ptr Prediction direction for use in AC prediction
2147 static inline int vc1_i_pred_dc(MpegEncContext *s, int overlap, int pq, int n,
2148 int16_t **dc_val_ptr, int *dir_ptr)
2150 int a, b, c, wrap, pred, scale;
2152 static const uint16_t dcpred[32] = {
2153 -1, 1024, 512, 341, 256, 205, 171, 146, 128,
2154 114, 102, 93, 85, 79, 73, 68, 64,
2155 60, 57, 54, 51, 49, 47, 45, 43,
2156 41, 39, 38, 37, 35, 34, 33
2159 /* find prediction - wmv3_dc_scale always used here in fact */
2160 if (n < 4) scale = s->y_dc_scale;
2161 else scale = s->c_dc_scale;
2163 wrap = s->block_wrap[n];
2164 dc_val= s->dc_val[0] + s->block_index[n];
2170 b = dc_val[ - 1 - wrap];
2171 a = dc_val[ - wrap];
2173 if (pq < 9 || !overlap)
2175 /* Set outer values */
2176 if (s->first_slice_line && (n!=2 && n!=3)) b=a=dcpred[scale];
2177 if (s->mb_x == 0 && (n!=1 && n!=3)) b=c=dcpred[scale];
2181 /* Set outer values */
2182 if (s->first_slice_line && (n!=2 && n!=3)) b=a=0;
2183 if (s->mb_x == 0 && (n!=1 && n!=3)) b=c=0;
2186 if (abs(a - b) <= abs(b - c)) {
2194 /* update predictor */
2195 *dc_val_ptr = &dc_val[0];
2200 /** Get predicted DC value
2201 * prediction dir: left=0, top=1
2202 * @param s MpegEncContext
2203 * @param[in] n block index in the current MB
2204 * @param dc_val_ptr Pointer to DC predictor
2205 * @param dir_ptr Prediction direction for use in AC prediction
2207 static inline int vc1_pred_dc(MpegEncContext *s, int overlap, int pq, int n,
2208 int a_avail, int c_avail,
2209 int16_t **dc_val_ptr, int *dir_ptr)
2211 int a, b, c, wrap, pred, scale;
2213 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
2216 /* find prediction - wmv3_dc_scale always used here in fact */
2217 if (n < 4) scale = s->y_dc_scale;
2218 else scale = s->c_dc_scale;
2220 wrap = s->block_wrap[n];
2221 dc_val= s->dc_val[0] + s->block_index[n];
2227 b = dc_val[ - 1 - wrap];
2228 a = dc_val[ - wrap];
2229 /* scale predictors if needed */
2230 q1 = s->current_picture.qscale_table[mb_pos];
2231 if(c_avail && (n!= 1 && n!=3)) {
2232 q2 = s->current_picture.qscale_table[mb_pos - 1];
2234 c = (c * s->y_dc_scale_table[q2] * ff_vc1_dqscale[s->y_dc_scale_table[q1] - 1] + 0x20000) >> 18;
2236 if(a_avail && (n!= 2 && n!=3)) {
2237 q2 = s->current_picture.qscale_table[mb_pos - s->mb_stride];
2239 a = (a * s->y_dc_scale_table[q2] * ff_vc1_dqscale[s->y_dc_scale_table[q1] - 1] + 0x20000) >> 18;
2241 if(a_avail && c_avail && (n!=3)) {
2244 if(n != 2) off -= s->mb_stride;
2245 q2 = s->current_picture.qscale_table[off];
2247 b = (b * s->y_dc_scale_table[q2] * ff_vc1_dqscale[s->y_dc_scale_table[q1] - 1] + 0x20000) >> 18;
2250 if(a_avail && c_avail) {
2251 if(abs(a - b) <= abs(b - c)) {
2258 } else if(a_avail) {
2261 } else if(c_avail) {
2269 /* update predictor */
2270 *dc_val_ptr = &dc_val[0];
2276 * @defgroup std_mb VC1 Macroblock-level functions in Simple/Main Profiles
2277 * @see 7.1.4, p91 and 8.1.1.7, p(1)04
2281 static inline int vc1_coded_block_pred(MpegEncContext * s, int n, uint8_t **coded_block_ptr)
2283 int xy, wrap, pred, a, b, c;
2285 xy = s->block_index[n];
2286 wrap = s->b8_stride;
2291 a = s->coded_block[xy - 1 ];
2292 b = s->coded_block[xy - 1 - wrap];
2293 c = s->coded_block[xy - wrap];
2302 *coded_block_ptr = &s->coded_block[xy];
2308 * Decode one AC coefficient
2309 * @param v The VC1 context
2310 * @param last Last coefficient
2311 * @param skip How much zero coefficients to skip
2312 * @param value Decoded AC coefficient value
2315 static void vc1_decode_ac_coeff(VC1Context *v, int *last, int *skip, int *value, int codingset)
2317 GetBitContext *gb = &v->s.gb;
2318 int index, escape, run = 0, level = 0, lst = 0;
2320 index = get_vlc2(gb, ff_vc1_ac_coeff_table[codingset].table, AC_VLC_BITS, 3);
2321 if (index != vc1_ac_sizes[codingset] - 1) {
2322 run = vc1_index_decode_table[codingset][index][0];
2323 level = vc1_index_decode_table[codingset][index][1];
2324 lst = index >= vc1_last_decode_table[codingset];
2328 escape = decode210(gb);
2330 index = get_vlc2(gb, ff_vc1_ac_coeff_table[codingset].table, AC_VLC_BITS, 3);
2331 run = vc1_index_decode_table[codingset][index][0];
2332 level = vc1_index_decode_table[codingset][index][1];
2333 lst = index >= vc1_last_decode_table[codingset];
2336 level += vc1_last_delta_level_table[codingset][run];
2338 level += vc1_delta_level_table[codingset][run];
2341 run += vc1_last_delta_run_table[codingset][level] + 1;
2343 run += vc1_delta_run_table[codingset][level] + 1;
2349 lst = get_bits(gb, 1);
2350 if(v->s.esc3_level_length == 0) {
2351 if(v->pq < 8 || v->dquantfrm) { // table 59
2352 v->s.esc3_level_length = get_bits(gb, 3);
2353 if(!v->s.esc3_level_length)
2354 v->s.esc3_level_length = get_bits(gb, 2) + 8;
2356 v->s.esc3_level_length = get_prefix(gb, 1, 6) + 2;
2358 v->s.esc3_run_length = 3 + get_bits(gb, 2);
2360 run = get_bits(gb, v->s.esc3_run_length);
2361 sign = get_bits(gb, 1);
2362 level = get_bits(gb, v->s.esc3_level_length);
2373 /** Decode intra block in intra frames - should be faster than decode_intra_block
2374 * @param v VC1Context
2375 * @param block block to decode
2376 * @param coded are AC coeffs present or not
2377 * @param codingset set of VLC to decode data
2379 static int vc1_decode_i_block(VC1Context *v, DCTELEM block[64], int n, int coded, int codingset)
2381 GetBitContext *gb = &v->s.gb;
2382 MpegEncContext *s = &v->s;
2383 int dc_pred_dir = 0; /* Direction of the DC prediction used */
2386 int16_t *ac_val, *ac_val2;
2389 /* Get DC differential */
2391 dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_luma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);
2393 dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_chroma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);
2396 av_log(s->avctx, AV_LOG_ERROR, "Illegal DC VLC\n");
2401 if (dcdiff == 119 /* ESC index value */)
2403 /* TODO: Optimize */
2404 if (v->pq == 1) dcdiff = get_bits(gb, 10);
2405 else if (v->pq == 2) dcdiff = get_bits(gb, 9);
2406 else dcdiff = get_bits(gb, 8);
2411 dcdiff = (dcdiff<<2) + get_bits(gb, 2) - 3;
2412 else if (v->pq == 2)
2413 dcdiff = (dcdiff<<1) + get_bits(gb, 1) - 1;
2415 if (get_bits(gb, 1))
2420 dcdiff += vc1_i_pred_dc(&v->s, v->overlap, v->pq, n, &dc_val, &dc_pred_dir);
2423 /* Store the quantized DC coeff, used for prediction */
2425 block[0] = dcdiff * s->y_dc_scale;
2427 block[0] = dcdiff * s->c_dc_scale;
2440 int last = 0, skip, value;
2441 const int8_t *zz_table;
2445 scale = v->pq * 2 + v->halfpq;
2449 zz_table = ff_vc1_horizontal_zz;
2451 zz_table = ff_vc1_vertical_zz;
2453 zz_table = ff_vc1_normal_zz;
2455 ac_val = s->ac_val[0][0] + s->block_index[n] * 16;
2457 if(dc_pred_dir) //left
2460 ac_val -= 16 * s->block_wrap[n];
2463 vc1_decode_ac_coeff(v, &last, &skip, &value, codingset);
2467 block[zz_table[i++]] = value;
2470 /* apply AC prediction if needed */
2472 if(dc_pred_dir) { //left
2473 for(k = 1; k < 8; k++)
2474 block[k << 3] += ac_val[k];
2476 for(k = 1; k < 8; k++)
2477 block[k] += ac_val[k + 8];
2480 /* save AC coeffs for further prediction */
2481 for(k = 1; k < 8; k++) {
2482 ac_val2[k] = block[k << 3];
2483 ac_val2[k + 8] = block[k];
2486 /* scale AC coeffs */
2487 for(k = 1; k < 64; k++)
2491 block[k] += (block[k] < 0) ? -v->pq : v->pq;
2494 if(s->ac_pred) i = 63;
2500 ac_val = s->ac_val[0][0] + s->block_index[n] * 16;
2503 scale = v->pq * 2 + v->halfpq;
2504 memset(ac_val2, 0, 16 * 2);
2505 if(dc_pred_dir) {//left
2508 memcpy(ac_val2, ac_val, 8 * 2);
2510 ac_val -= 16 * s->block_wrap[n];
2512 memcpy(ac_val2 + 8, ac_val + 8, 8 * 2);
2515 /* apply AC prediction if needed */
2517 if(dc_pred_dir) { //left
2518 for(k = 1; k < 8; k++) {
2519 block[k << 3] = ac_val[k] * scale;
2520 if(!v->pquantizer && block[k << 3])
2521 block[k << 3] += (block[k << 3] < 0) ? -v->pq : v->pq;
2524 for(k = 1; k < 8; k++) {
2525 block[k] = ac_val[k + 8] * scale;
2526 if(!v->pquantizer && block[k])
2527 block[k] += (block[k] < 0) ? -v->pq : v->pq;
2533 s->block_last_index[n] = i;
2538 /** Decode intra block in intra frames - should be faster than decode_intra_block
2539 * @param v VC1Context
2540 * @param block block to decode
2541 * @param coded are AC coeffs present or not
2542 * @param codingset set of VLC to decode data
2544 static int vc1_decode_i_block_adv(VC1Context *v, DCTELEM block[64], int n, int coded, int codingset, int mquant)
2546 GetBitContext *gb = &v->s.gb;
2547 MpegEncContext *s = &v->s;
2548 int dc_pred_dir = 0; /* Direction of the DC prediction used */
2551 int16_t *ac_val, *ac_val2;
2553 int a_avail = v->a_avail, c_avail = v->c_avail;
2554 int use_pred = s->ac_pred;
2557 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
2559 /* Get DC differential */
2561 dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_luma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);
2563 dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_chroma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);
2566 av_log(s->avctx, AV_LOG_ERROR, "Illegal DC VLC\n");
2571 if (dcdiff == 119 /* ESC index value */)
2573 /* TODO: Optimize */
2574 if (mquant == 1) dcdiff = get_bits(gb, 10);
2575 else if (mquant == 2) dcdiff = get_bits(gb, 9);
2576 else dcdiff = get_bits(gb, 8);
2581 dcdiff = (dcdiff<<2) + get_bits(gb, 2) - 3;
2582 else if (mquant == 2)
2583 dcdiff = (dcdiff<<1) + get_bits(gb, 1) - 1;
2585 if (get_bits(gb, 1))
2590 dcdiff += vc1_pred_dc(&v->s, v->overlap, mquant, n, v->a_avail, v->c_avail, &dc_val, &dc_pred_dir);
2593 /* Store the quantized DC coeff, used for prediction */
2595 block[0] = dcdiff * s->y_dc_scale;
2597 block[0] = dcdiff * s->c_dc_scale;
2606 /* check if AC is needed at all */
2607 if(!a_avail && !c_avail) use_pred = 0;
2608 ac_val = s->ac_val[0][0] + s->block_index[n] * 16;
2611 scale = mquant * 2 + v->halfpq;
2613 if(dc_pred_dir) //left
2616 ac_val -= 16 * s->block_wrap[n];
2618 q1 = s->current_picture.qscale_table[mb_pos];
2619 if(dc_pred_dir && c_avail && mb_pos) q2 = s->current_picture.qscale_table[mb_pos - 1];
2620 if(!dc_pred_dir && a_avail && mb_pos >= s->mb_stride) q2 = s->current_picture.qscale_table[mb_pos - s->mb_stride];
2621 if(dc_pred_dir && n==1) q2 = q1;
2622 if(!dc_pred_dir && n==2) q2 = q1;
2626 int last = 0, skip, value;
2627 const int8_t *zz_table;
2632 zz_table = ff_vc1_horizontal_zz;
2634 zz_table = ff_vc1_vertical_zz;
2636 zz_table = ff_vc1_normal_zz;
2639 vc1_decode_ac_coeff(v, &last, &skip, &value, codingset);
2643 block[zz_table[i++]] = value;
2646 /* apply AC prediction if needed */
2648 /* scale predictors if needed*/
2650 q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;
2651 q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;
2653 if(dc_pred_dir) { //left
2654 for(k = 1; k < 8; k++)
2655 block[k << 3] += (ac_val[k] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;
2657 for(k = 1; k < 8; k++)
2658 block[k] += (ac_val[k + 8] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;
2661 if(dc_pred_dir) { //left
2662 for(k = 1; k < 8; k++)
2663 block[k << 3] += ac_val[k];
2665 for(k = 1; k < 8; k++)
2666 block[k] += ac_val[k + 8];
2670 /* save AC coeffs for further prediction */
2671 for(k = 1; k < 8; k++) {
2672 ac_val2[k] = block[k << 3];
2673 ac_val2[k + 8] = block[k];
2676 /* scale AC coeffs */
2677 for(k = 1; k < 64; k++)
2681 block[k] += (block[k] < 0) ? -mquant : mquant;
2684 if(use_pred) i = 63;
2685 } else { // no AC coeffs
2688 memset(ac_val2, 0, 16 * 2);
2689 if(dc_pred_dir) {//left
2691 memcpy(ac_val2, ac_val, 8 * 2);
2693 q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;
2694 q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;
2695 for(k = 1; k < 8; k++)
2696 ac_val2[k] = (ac_val2[k] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;
2701 memcpy(ac_val2 + 8, ac_val + 8, 8 * 2);
2703 q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;
2704 q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;
2705 for(k = 1; k < 8; k++)
2706 ac_val2[k + 8] = (ac_val2[k + 8] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;
2711 /* apply AC prediction if needed */
2713 if(dc_pred_dir) { //left
2714 for(k = 1; k < 8; k++) {
2715 block[k << 3] = ac_val2[k] * scale;
2716 if(!v->pquantizer && block[k << 3])
2717 block[k << 3] += (block[k << 3] < 0) ? -mquant : mquant;
2720 for(k = 1; k < 8; k++) {
2721 block[k] = ac_val2[k + 8] * scale;
2722 if(!v->pquantizer && block[k])
2723 block[k] += (block[k] < 0) ? -mquant : mquant;
2729 s->block_last_index[n] = i;
2734 /** Decode intra block in inter frames - more generic version than vc1_decode_i_block
2735 * @param v VC1Context
2736 * @param block block to decode
2737 * @param coded are AC coeffs present or not
2738 * @param mquant block quantizer
2739 * @param codingset set of VLC to decode data
2741 static int vc1_decode_intra_block(VC1Context *v, DCTELEM block[64], int n, int coded, int mquant, int codingset)
2743 GetBitContext *gb = &v->s.gb;
2744 MpegEncContext *s = &v->s;
2745 int dc_pred_dir = 0; /* Direction of the DC prediction used */
2748 int16_t *ac_val, *ac_val2;
2750 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
2751 int a_avail = v->a_avail, c_avail = v->c_avail;
2752 int use_pred = s->ac_pred;
2756 /* XXX: Guard against dumb values of mquant */
2757 mquant = (mquant < 1) ? 0 : ( (mquant>31) ? 31 : mquant );
2759 /* Set DC scale - y and c use the same */
2760 s->y_dc_scale = s->y_dc_scale_table[mquant];
2761 s->c_dc_scale = s->c_dc_scale_table[mquant];
2763 /* Get DC differential */
2765 dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_luma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);
2767 dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_chroma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);
2770 av_log(s->avctx, AV_LOG_ERROR, "Illegal DC VLC\n");
2775 if (dcdiff == 119 /* ESC index value */)
2777 /* TODO: Optimize */
2778 if (mquant == 1) dcdiff = get_bits(gb, 10);
2779 else if (mquant == 2) dcdiff = get_bits(gb, 9);
2780 else dcdiff = get_bits(gb, 8);
2785 dcdiff = (dcdiff<<2) + get_bits(gb, 2) - 3;
2786 else if (mquant == 2)
2787 dcdiff = (dcdiff<<1) + get_bits(gb, 1) - 1;
2789 if (get_bits(gb, 1))
2794 dcdiff += vc1_pred_dc(&v->s, v->overlap, mquant, n, a_avail, c_avail, &dc_val, &dc_pred_dir);
2797 /* Store the quantized DC coeff, used for prediction */
2800 block[0] = dcdiff * s->y_dc_scale;
2802 block[0] = dcdiff * s->c_dc_scale;
2811 /* check if AC is needed at all and adjust direction if needed */
2812 if(!a_avail) dc_pred_dir = 1;
2813 if(!c_avail) dc_pred_dir = 0;
2814 if(!a_avail && !c_avail) use_pred = 0;
2815 ac_val = s->ac_val[0][0] + s->block_index[n] * 16;
2818 scale = mquant * 2 + v->halfpq;
2820 if(dc_pred_dir) //left
2823 ac_val -= 16 * s->block_wrap[n];
2825 q1 = s->current_picture.qscale_table[mb_pos];
2826 if(dc_pred_dir && c_avail && mb_pos) q2 = s->current_picture.qscale_table[mb_pos - 1];
2827 if(!dc_pred_dir && a_avail && mb_pos >= s->mb_stride) q2 = s->current_picture.qscale_table[mb_pos - s->mb_stride];
2828 if(dc_pred_dir && n==1) q2 = q1;
2829 if(!dc_pred_dir && n==2) q2 = q1;
2833 int last = 0, skip, value;
2834 const int8_t *zz_table;
2837 zz_table = ff_vc1_simple_progressive_8x8_zz;
2840 vc1_decode_ac_coeff(v, &last, &skip, &value, codingset);
2844 block[zz_table[i++]] = value;
2847 /* apply AC prediction if needed */
2849 /* scale predictors if needed*/
2851 q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;
2852 q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;
2854 if(dc_pred_dir) { //left
2855 for(k = 1; k < 8; k++)
2856 block[k << 3] += (ac_val[k] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;
2858 for(k = 1; k < 8; k++)
2859 block[k] += (ac_val[k + 8] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;
2862 if(dc_pred_dir) { //left
2863 for(k = 1; k < 8; k++)
2864 block[k << 3] += ac_val[k];
2866 for(k = 1; k < 8; k++)
2867 block[k] += ac_val[k + 8];
2871 /* save AC coeffs for further prediction */
2872 for(k = 1; k < 8; k++) {
2873 ac_val2[k] = block[k << 3];
2874 ac_val2[k + 8] = block[k];
2877 /* scale AC coeffs */
2878 for(k = 1; k < 64; k++)
2882 block[k] += (block[k] < 0) ? -mquant : mquant;
2885 if(use_pred) i = 63;
2886 } else { // no AC coeffs
2889 memset(ac_val2, 0, 16 * 2);
2890 if(dc_pred_dir) {//left
2892 memcpy(ac_val2, ac_val, 8 * 2);
2894 q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;
2895 q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;
2896 for(k = 1; k < 8; k++)
2897 ac_val2[k] = (ac_val2[k] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;
2902 memcpy(ac_val2 + 8, ac_val + 8, 8 * 2);
2904 q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;
2905 q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;
2906 for(k = 1; k < 8; k++)
2907 ac_val2[k + 8] = (ac_val2[k + 8] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;
2912 /* apply AC prediction if needed */
2914 if(dc_pred_dir) { //left
2915 for(k = 1; k < 8; k++) {
2916 block[k << 3] = ac_val2[k] * scale;
2917 if(!v->pquantizer && block[k << 3])
2918 block[k << 3] += (block[k << 3] < 0) ? -mquant : mquant;
2921 for(k = 1; k < 8; k++) {
2922 block[k] = ac_val2[k + 8] * scale;
2923 if(!v->pquantizer && block[k])
2924 block[k] += (block[k] < 0) ? -mquant : mquant;
2930 s->block_last_index[n] = i;
2937 static int vc1_decode_p_block(VC1Context *v, DCTELEM block[64], int n, int mquant, int ttmb, int first_block)
2939 MpegEncContext *s = &v->s;
2940 GetBitContext *gb = &s->gb;
2943 int scale, off, idx, last, skip, value;
2944 int ttblk = ttmb & 7;
2947 ttblk = ff_vc1_ttblk_to_tt[v->tt_index][get_vlc2(gb, ff_vc1_ttblk_vlc[v->tt_index].table, VC1_TTBLK_VLC_BITS, 1)];
2949 if(ttblk == TT_4X4) {
2950 subblkpat = ~(get_vlc2(gb, ff_vc1_subblkpat_vlc[v->tt_index].table, VC1_SUBBLKPAT_VLC_BITS, 1) + 1);
2952 if((ttblk != TT_8X8 && ttblk != TT_4X4) && (v->ttmbf || (ttmb != -1 && (ttmb & 8) && !first_block))) {
2953 subblkpat = decode012(gb);
2954 if(subblkpat) subblkpat ^= 3; //swap decoded pattern bits
2955 if(ttblk == TT_8X4_TOP || ttblk == TT_8X4_BOTTOM) ttblk = TT_8X4;
2956 if(ttblk == TT_4X8_RIGHT || ttblk == TT_4X8_LEFT) ttblk = TT_4X8;
2958 scale = 2 * mquant + ((v->pq == mquant) ? v->halfpq : 0);
2960 // convert transforms like 8X4_TOP to generic TT and SUBBLKPAT
2961 if(ttblk == TT_8X4_TOP || ttblk == TT_8X4_BOTTOM) {
2962 subblkpat = 2 - (ttblk == TT_8X4_TOP);
2965 if(ttblk == TT_4X8_RIGHT || ttblk == TT_4X8_LEFT) {
2966 subblkpat = 2 - (ttblk == TT_4X8_LEFT);
2974 vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);
2978 idx = ff_vc1_simple_progressive_8x8_zz[i++];
2979 block[idx] = value * scale;
2981 block[idx] += (block[idx] < 0) ? -mquant : mquant;
2983 s->dsp.vc1_inv_trans_8x8(block);
2986 for(j = 0; j < 4; j++) {
2987 last = subblkpat & (1 << (3 - j));
2989 off = (j & 1) * 4 + (j & 2) * 16;
2991 vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);
2995 idx = ff_vc1_simple_progressive_4x4_zz[i++];
2996 block[idx + off] = value * scale;
2998 block[idx + off] += (block[idx + off] < 0) ? -mquant : mquant;
3000 if(!(subblkpat & (1 << (3 - j))))
3001 s->dsp.vc1_inv_trans_4x4(block, j);
3005 for(j = 0; j < 2; j++) {
3006 last = subblkpat & (1 << (1 - j));
3010 vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);
3014 if(v->profile < PROFILE_ADVANCED)
3015 idx = ff_vc1_simple_progressive_8x4_zz[i++];
3017 idx = ff_vc1_adv_progressive_8x4_zz[i++];
3018 block[idx + off] = value * scale;
3020 block[idx + off] += (block[idx + off] < 0) ? -mquant : mquant;
3022 if(!(subblkpat & (1 << (1 - j))))
3023 s->dsp.vc1_inv_trans_8x4(block, j);
3027 for(j = 0; j < 2; j++) {
3028 last = subblkpat & (1 << (1 - j));
3032 vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);
3036 if(v->profile < PROFILE_ADVANCED)
3037 idx = ff_vc1_simple_progressive_4x8_zz[i++];
3039 idx = ff_vc1_adv_progressive_4x8_zz[i++];
3040 block[idx + off] = value * scale;
3042 block[idx + off] += (block[idx + off] < 0) ? -mquant : mquant;
3044 if(!(subblkpat & (1 << (1 - j))))
3045 s->dsp.vc1_inv_trans_4x8(block, j);
3053 /** Decode one P-frame MB (in Simple/Main profile)
3055 static int vc1_decode_p_mb(VC1Context *v)
3057 MpegEncContext *s = &v->s;
3058 GetBitContext *gb = &s->gb;
3060 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
3061 int cbp; /* cbp decoding stuff */
3062 int mqdiff, mquant; /* MB quantization */
3063 int ttmb = v->ttfrm; /* MB Transform type */
3066 static const int size_table[6] = { 0, 2, 3, 4, 5, 8 },
3067 offset_table[6] = { 0, 1, 3, 7, 15, 31 };
3068 int mb_has_coeffs = 1; /* last_flag */
3069 int dmv_x, dmv_y; /* Differential MV components */
3070 int index, index1; /* LUT indices */
3071 int val, sign; /* temp values */
3072 int first_block = 1;
3074 int skipped, fourmv;
3076 mquant = v->pq; /* Loosy initialization */
3078 if (v->mv_type_is_raw)
3079 fourmv = get_bits1(gb);
3081 fourmv = v->mv_type_mb_plane[mb_pos];
3083 skipped = get_bits1(gb);
3085 skipped = v->s.mbskip_table[mb_pos];
3087 s->dsp.clear_blocks(s->block[0]);
3089 if (!fourmv) /* 1MV mode */
3093 GET_MVDATA(dmv_x, dmv_y);
3096 s->current_picture.motion_val[1][s->block_index[0]][0] = 0;
3097 s->current_picture.motion_val[1][s->block_index[0]][1] = 0;
3099 s->current_picture.mb_type[mb_pos] = s->mb_intra ? MB_TYPE_INTRA : MB_TYPE_16x16;
3100 vc1_pred_mv(s, 0, dmv_x, dmv_y, 1, v->range_x, v->range_y, v->mb_type[0]);
3102 /* FIXME Set DC val for inter block ? */
3103 if (s->mb_intra && !mb_has_coeffs)
3106 s->ac_pred = get_bits(gb, 1);
3109 else if (mb_has_coeffs)
3111 if (s->mb_intra) s->ac_pred = get_bits(gb, 1);
3112 cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
3120 s->current_picture.qscale_table[mb_pos] = mquant;
3122 if (!v->ttmbf && !s->mb_intra && mb_has_coeffs)
3123 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table,
3124 VC1_TTMB_VLC_BITS, 2);
3125 if(!s->mb_intra) vc1_mc_1mv(v, 0);
3129 s->dc_val[0][s->block_index[i]] = 0;
3131 val = ((cbp >> (5 - i)) & 1);
3132 off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);
3133 v->mb_type[0][s->block_index[i]] = s->mb_intra;
3135 /* check if prediction blocks A and C are available */
3136 v->a_avail = v->c_avail = 0;
3137 if(i == 2 || i == 3 || !s->first_slice_line)
3138 v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];
3139 if(i == 1 || i == 3 || s->mb_x)
3140 v->c_avail = v->mb_type[0][s->block_index[i] - 1];
3142 vc1_decode_intra_block(v, s->block[i], i, val, mquant, (i&4)?v->codingset2:v->codingset);
3143 if((i>3) && (s->flags & CODEC_FLAG_GRAY)) continue;
3144 s->dsp.vc1_inv_trans_8x8(s->block[i]);
3145 if(v->rangeredfrm) for(j = 0; j < 64; j++) s->block[i][j] <<= 1;
3146 for(j = 0; j < 64; j++) s->block[i][j] += 128;
3147 if(!v->res_fasttx && v->res_x8) for(j = 0; j < 64; j++) s->block[i][j] += 16;
3148 s->dsp.put_pixels_clamped(s->block[i], s->dest[dst_idx] + off, s->linesize >> ((i & 4) >> 2));
3149 if(v->pq >= 9 && v->overlap) {
3151 s->dsp.vc1_h_overlap(s->dest[dst_idx] + off, s->linesize >> ((i & 4) >> 2));
3153 s->dsp.vc1_v_overlap(s->dest[dst_idx] + off, s->linesize >> ((i & 4) >> 2));
3156 vc1_decode_p_block(v, s->block[i], i, mquant, ttmb, first_block);
3157 if(!v->ttmbf && ttmb < 8) ttmb = -1;
3159 if((i<4) || !(s->flags & CODEC_FLAG_GRAY))
3160 s->dsp.add_pixels_clamped(s->block[i], s->dest[dst_idx] + off, (i&4)?s->uvlinesize:s->linesize);
3167 for(i = 0; i < 6; i++) {
3168 v->mb_type[0][s->block_index[i]] = 0;
3169 s->dc_val[0][s->block_index[i]] = 0;
3171 s->current_picture.mb_type[mb_pos] = MB_TYPE_SKIP;
3172 s->current_picture.qscale_table[mb_pos] = 0;
3173 vc1_pred_mv(s, 0, 0, 0, 1, v->range_x, v->range_y, v->mb_type[0]);
3180 if (!skipped /* unskipped MB */)
3182 int intra_count = 0, coded_inter = 0;
3183 int is_intra[6], is_coded[6];
3185 cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
3188 val = ((cbp >> (5 - i)) & 1);
3189 s->dc_val[0][s->block_index[i]] = 0;
3196 GET_MVDATA(dmv_x, dmv_y);
3198 vc1_pred_mv(s, i, dmv_x, dmv_y, 0, v->range_x, v->range_y, v->mb_type[0]);
3199 if(!s->mb_intra) vc1_mc_4mv_luma(v, i);
3200 intra_count += s->mb_intra;
3201 is_intra[i] = s->mb_intra;
3202 is_coded[i] = mb_has_coeffs;
3205 is_intra[i] = (intra_count >= 3);
3208 if(i == 4) vc1_mc_4mv_chroma(v);
3209 v->mb_type[0][s->block_index[i]] = is_intra[i];
3210 if(!coded_inter) coded_inter = !is_intra[i] & is_coded[i];
3212 // if there are no coded blocks then don't do anything more
3213 if(!intra_count && !coded_inter) return 0;
3216 s->current_picture.qscale_table[mb_pos] = mquant;
3217 /* test if block is intra and has pred */
3222 if(((!s->first_slice_line || (i==2 || i==3)) && v->mb_type[0][s->block_index[i] - s->block_wrap[i]])
3223 || ((s->mb_x || (i==1 || i==3)) && v->mb_type[0][s->block_index[i] - 1])) {
3228 if(intrapred)s->ac_pred = get_bits(gb, 1);
3229 else s->ac_pred = 0;
3231 if (!v->ttmbf && coded_inter)
3232 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);
3236 off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);
3237 s->mb_intra = is_intra[i];
3239 /* check if prediction blocks A and C are available */
3240 v->a_avail = v->c_avail = 0;
3241 if(i == 2 || i == 3 || !s->first_slice_line)
3242 v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];
3243 if(i == 1 || i == 3 || s->mb_x)
3244 v->c_avail = v->mb_type[0][s->block_index[i] - 1];
3246 vc1_decode_intra_block(v, s->block[i], i, is_coded[i], mquant, (i&4)?v->codingset2:v->codingset);
3247 if((i>3) && (s->flags & CODEC_FLAG_GRAY)) continue;
3248 s->dsp.vc1_inv_trans_8x8(s->block[i]);
3249 if(v->rangeredfrm) for(j = 0; j < 64; j++) s->block[i][j] <<= 1;
3250 for(j = 0; j < 64; j++) s->block[i][j] += 128;
3251 if(!v->res_fasttx && v->res_x8) for(j = 0; j < 64; j++) s->block[i][j] += 16;
3252 s->dsp.put_pixels_clamped(s->block[i], s->dest[dst_idx] + off, (i&4)?s->uvlinesize:s->linesize);
3253 if(v->pq >= 9 && v->overlap) {
3255 s->dsp.vc1_h_overlap(s->dest[dst_idx] + off, s->linesize >> ((i & 4) >> 2));
3257 s->dsp.vc1_v_overlap(s->dest[dst_idx] + off, s->linesize >> ((i & 4) >> 2));
3259 } else if(is_coded[i]) {
3260 status = vc1_decode_p_block(v, s->block[i], i, mquant, ttmb, first_block);
3261 if(!v->ttmbf && ttmb < 8) ttmb = -1;
3263 if((i<4) || !(s->flags & CODEC_FLAG_GRAY))
3264 s->dsp.add_pixels_clamped(s->block[i], s->dest[dst_idx] + off, (i&4)?s->uvlinesize:s->linesize);
3272 s->current_picture.qscale_table[mb_pos] = 0;
3273 for (i=0; i<6; i++) {
3274 v->mb_type[0][s->block_index[i]] = 0;
3275 s->dc_val[0][s->block_index[i]] = 0;
3279 vc1_pred_mv(s, i, 0, 0, 0, v->range_x, v->range_y, v->mb_type[0]);
3280 vc1_mc_4mv_luma(v, i);
3282 vc1_mc_4mv_chroma(v);
3283 s->current_picture.qscale_table[mb_pos] = 0;
3288 /* Should never happen */
3292 /** Decode one B-frame MB (in Main profile)
3294 static void vc1_decode_b_mb(VC1Context *v)
3296 MpegEncContext *s = &v->s;
3297 GetBitContext *gb = &s->gb;
3299 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
3300 int cbp = 0; /* cbp decoding stuff */
3301 int mqdiff, mquant; /* MB quantization */
3302 int ttmb = v->ttfrm; /* MB Transform type */
3304 static const int size_table[6] = { 0, 2, 3, 4, 5, 8 },
3305 offset_table[6] = { 0, 1, 3, 7, 15, 31 };
3306 int mb_has_coeffs = 0; /* last_flag */
3307 int index, index1; /* LUT indices */
3308 int val, sign; /* temp values */
3309 int first_block = 1;
3311 int skipped, direct;
3312 int dmv_x[2], dmv_y[2];
3313 int bmvtype = BMV_TYPE_BACKWARD;
3315 mquant = v->pq; /* Loosy initialization */
3319 direct = get_bits1(gb);
3321 direct = v->direct_mb_plane[mb_pos];
3323 skipped = get_bits1(gb);
3325 skipped = v->s.mbskip_table[mb_pos];
3327 s->dsp.clear_blocks(s->block[0]);
3328 dmv_x[0] = dmv_x[1] = dmv_y[0] = dmv_y[1] = 0;
3329 for(i = 0; i < 6; i++) {
3330 v->mb_type[0][s->block_index[i]] = 0;
3331 s->dc_val[0][s->block_index[i]] = 0;
3333 s->current_picture.qscale_table[mb_pos] = 0;
3337 GET_MVDATA(dmv_x[0], dmv_y[0]);
3338 dmv_x[1] = dmv_x[0];
3339 dmv_y[1] = dmv_y[0];
3341 if(skipped || !s->mb_intra) {
3342 bmvtype = decode012(gb);
3345 bmvtype = (v->bfraction >= (B_FRACTION_DEN/2)) ? BMV_TYPE_BACKWARD : BMV_TYPE_FORWARD;
3348 bmvtype = (v->bfraction >= (B_FRACTION_DEN/2)) ? BMV_TYPE_FORWARD : BMV_TYPE_BACKWARD;
3351 bmvtype = BMV_TYPE_INTERPOLATED;
3352 dmv_x[0] = dmv_y[0] = 0;
3356 for(i = 0; i < 6; i++)
3357 v->mb_type[0][s->block_index[i]] = s->mb_intra;
3360 if(direct) bmvtype = BMV_TYPE_INTERPOLATED;
3361 vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);
3362 vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);
3366 cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
3370 s->current_picture.qscale_table[mb_pos] = mquant;
3372 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);
3373 dmv_x[0] = dmv_y[0] = dmv_x[1] = dmv_y[1] = 0;
3374 vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);
3375 vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);
3377 if(!mb_has_coeffs && !s->mb_intra) {
3378 /* no coded blocks - effectively skipped */
3379 vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);
3380 vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);
3383 if(s->mb_intra && !mb_has_coeffs) {
3385 s->current_picture.qscale_table[mb_pos] = mquant;
3386 s->ac_pred = get_bits1(gb);
3388 vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);
3390 if(bmvtype == BMV_TYPE_INTERPOLATED) {
3391 GET_MVDATA(dmv_x[0], dmv_y[0]);
3392 if(!mb_has_coeffs) {
3393 /* interpolated skipped block */
3394 vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);
3395 vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);
3399 vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);
3401 vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);
3404 s->ac_pred = get_bits1(gb);
3405 cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
3407 s->current_picture.qscale_table[mb_pos] = mquant;
3408 if(!v->ttmbf && !s->mb_intra && mb_has_coeffs)
3409 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);
3415 s->dc_val[0][s->block_index[i]] = 0;
3417 val = ((cbp >> (5 - i)) & 1);
3418 off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);
3419 v->mb_type[0][s->block_index[i]] = s->mb_intra;
3421 /* check if prediction blocks A and C are available */
3422 v->a_avail = v->c_avail = 0;
3423 if(i == 2 || i == 3 || !s->first_slice_line)
3424 v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];
3425 if(i == 1 || i == 3 || s->mb_x)
3426 v->c_avail = v->mb_type[0][s->block_index[i] - 1];
3428 vc1_decode_intra_block(v, s->block[i], i, val, mquant, (i&4)?v->codingset2:v->codingset);
3429 if((i>3) && (s->flags & CODEC_FLAG_GRAY)) continue;
3430 s->dsp.vc1_inv_trans_8x8(s->block[i]);
3431 if(v->rangeredfrm) for(j = 0; j < 64; j++) s->block[i][j] <<= 1;
3432 for(j = 0; j < 64; j++) s->block[i][j] += 128;
3433 s->dsp.put_pixels_clamped(s->block[i], s->dest[dst_idx] + off, s->linesize >> ((i & 4) >> 2));
3435 vc1_decode_p_block(v, s->block[i], i, mquant, ttmb, first_block);
3436 if(!v->ttmbf && ttmb < 8) ttmb = -1;
3438 if((i<4) || !(s->flags & CODEC_FLAG_GRAY))
3439 s->dsp.add_pixels_clamped(s->block[i], s->dest[dst_idx] + off, (i&4)?s->uvlinesize:s->linesize);
3444 /** Decode blocks of I-frame
3446 static void vc1_decode_i_blocks(VC1Context *v)
3449 MpegEncContext *s = &v->s;
3454 /* select codingmode used for VLC tables selection */
3455 switch(v->y_ac_table_index){
3457 v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;
3460 v->codingset = CS_HIGH_MOT_INTRA;
3463 v->codingset = CS_MID_RATE_INTRA;
3467 switch(v->c_ac_table_index){
3469 v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;
3472 v->codingset2 = CS_HIGH_MOT_INTER;
3475 v->codingset2 = CS_MID_RATE_INTER;
3479 /* Set DC scale - y and c use the same */
3480 s->y_dc_scale = s->y_dc_scale_table[v->pq];
3481 s->c_dc_scale = s->c_dc_scale_table[v->pq];
3484 s->mb_x = s->mb_y = 0;
3486 s->first_slice_line = 1;
3487 ff_er_add_slice(s, 0, 0, s->mb_width - 1, s->mb_height - 1, (AC_END|DC_END|MV_END));
3488 for(s->mb_y = 0; s->mb_y < s->mb_height; s->mb_y++) {
3489 for(s->mb_x = 0; s->mb_x < s->mb_width; s->mb_x++) {
3490 ff_init_block_index(s);
3491 ff_update_block_index(s);
3492 s->dsp.clear_blocks(s->block[0]);
3493 mb_pos = s->mb_x + s->mb_y * s->mb_width;
3494 s->current_picture.mb_type[mb_pos] = MB_TYPE_INTRA;
3495 s->current_picture.qscale_table[mb_pos] = v->pq;
3496 s->current_picture.motion_val[1][s->block_index[0]][0] = 0;
3497 s->current_picture.motion_val[1][s->block_index[0]][1] = 0;
3499 // do actual MB decoding and displaying
3500 cbp = get_vlc2(&v->s.gb, ff_msmp4_mb_i_vlc.table, MB_INTRA_VLC_BITS, 2);
3501 v->s.ac_pred = get_bits(&v->s.gb, 1);
3503 for(k = 0; k < 6; k++) {
3504 val = ((cbp >> (5 - k)) & 1);
3507 int pred = vc1_coded_block_pred(&v->s, k, &coded_val);
3511 cbp |= val << (5 - k);
3513 vc1_decode_i_block(v, s->block[k], k, val, (k<4)? v->codingset : v->codingset2);
3515 s->dsp.vc1_inv_trans_8x8(s->block[k]);
3516 if(!v->res_fasttx && !v->res_x8) for(j = 0; j < 64; j++) s->block[k][j] -= 16;
3517 if(v->pq >= 9 && v->overlap) {
3518 for(j = 0; j < 64; j++) s->block[k][j] += 128;
3522 vc1_put_block(v, s->block);
3523 if(v->pq >= 9 && v->overlap) {
3525 s->dsp.vc1_h_overlap(s->dest[0], s->linesize);
3526 s->dsp.vc1_h_overlap(s->dest[0] + 8 * s->linesize, s->linesize);
3527 if(!(s->flags & CODEC_FLAG_GRAY)) {
3528 s->dsp.vc1_h_overlap(s->dest[1], s->uvlinesize);
3529 s->dsp.vc1_h_overlap(s->dest[2], s->uvlinesize);
3532 s->dsp.vc1_h_overlap(s->dest[0] + 8, s->linesize);
3533 s->dsp.vc1_h_overlap(s->dest[0] + 8 * s->linesize + 8, s->linesize);
3534 if(!s->first_slice_line) {
3535 s->dsp.vc1_v_overlap(s->dest[0], s->linesize);
3536 s->dsp.vc1_v_overlap(s->dest[0] + 8, s->linesize);
3537 if(!(s->flags & CODEC_FLAG_GRAY)) {
3538 s->dsp.vc1_v_overlap(s->dest[1], s->uvlinesize);
3539 s->dsp.vc1_v_overlap(s->dest[2], s->uvlinesize);
3542 s->dsp.vc1_v_overlap(s->dest[0] + 8 * s->linesize, s->linesize);
3543 s->dsp.vc1_v_overlap(s->dest[0] + 8 * s->linesize + 8, s->linesize);
3546 if(get_bits_count(&s->gb) > v->bits) {
3547 av_log(s->avctx, AV_LOG_ERROR, "Bits overconsumption: %i > %i\n", get_bits_count(&s->gb), v->bits);
3551 ff_draw_horiz_band(s, s->mb_y * 16, 16);
3552 s->first_slice_line = 0;
3556 /** Decode blocks of I-frame for advanced profile
3558 static void vc1_decode_i_blocks_adv(VC1Context *v)
3561 MpegEncContext *s = &v->s;
3568 GetBitContext *gb = &s->gb;
3570 /* select codingmode used for VLC tables selection */
3571 switch(v->y_ac_table_index){
3573 v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;
3576 v->codingset = CS_HIGH_MOT_INTRA;
3579 v->codingset = CS_MID_RATE_INTRA;
3583 switch(v->c_ac_table_index){
3585 v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;
3588 v->codingset2 = CS_HIGH_MOT_INTER;
3591 v->codingset2 = CS_MID_RATE_INTER;
3596 s->mb_x = s->mb_y = 0;
3598 s->first_slice_line = 1;
3599 ff_er_add_slice(s, 0, 0, s->mb_width - 1, s->mb_height - 1, (AC_END|DC_END|MV_END));
3600 for(s->mb_y = 0; s->mb_y < s->mb_height; s->mb_y++) {
3601 for(s->mb_x = 0; s->mb_x < s->mb_width; s->mb_x++) {
3602 ff_init_block_index(s);
3603 ff_update_block_index(s);
3604 s->dsp.clear_blocks(s->block[0]);
3605 mb_pos = s->mb_x + s->mb_y * s->mb_stride;
3606 s->current_picture.mb_type[mb_pos] = MB_TYPE_INTRA;
3607 s->current_picture.motion_val[1][s->block_index[0]][0] = 0;
3608 s->current_picture.motion_val[1][s->block_index[0]][1] = 0;
3610 // do actual MB decoding and displaying
3611 cbp = get_vlc2(&v->s.gb, ff_msmp4_mb_i_vlc.table, MB_INTRA_VLC_BITS, 2);
3612 if(v->acpred_is_raw)
3613 v->s.ac_pred = get_bits(&v->s.gb, 1);
3615 v->s.ac_pred = v->acpred_plane[mb_pos];
3617 if(v->condover == CONDOVER_SELECT) {
3618 if(v->overflg_is_raw)
3619 overlap = get_bits(&v->s.gb, 1);
3621 overlap = v->over_flags_plane[mb_pos];
3623 overlap = (v->condover == CONDOVER_ALL);
3627 s->current_picture.qscale_table[mb_pos] = mquant;
3628 /* Set DC scale - y and c use the same */
3629 s->y_dc_scale = s->y_dc_scale_table[mquant];
3630 s->c_dc_scale = s->c_dc_scale_table[mquant];
3632 for(k = 0; k < 6; k++) {
3633 val = ((cbp >> (5 - k)) & 1);
3636 int pred = vc1_coded_block_pred(&v->s, k, &coded_val);
3640 cbp |= val << (5 - k);
3642 v->a_avail = !s->first_slice_line || (k==2 || k==3);
3643 v->c_avail = !!s->mb_x || (k==1 || k==3);
3645 vc1_decode_i_block_adv(v, s->block[k], k, val, (k<4)? v->codingset : v->codingset2, mquant);
3647 s->dsp.vc1_inv_trans_8x8(s->block[k]);
3648 for(j = 0; j < 64; j++) s->block[k][j] += 128;
3651 vc1_put_block(v, s->block);
3654 s->dsp.vc1_h_overlap(s->dest[0], s->linesize);
3655 s->dsp.vc1_h_overlap(s->dest[0] + 8 * s->linesize, s->linesize);
3656 if(!(s->flags & CODEC_FLAG_GRAY)) {
3657 s->dsp.vc1_h_overlap(s->dest[1], s->uvlinesize);
3658 s->dsp.vc1_h_overlap(s->dest[2], s->uvlinesize);
3661 s->dsp.vc1_h_overlap(s->dest[0] + 8, s->linesize);
3662 s->dsp.vc1_h_overlap(s->dest[0] + 8 * s->linesize + 8, s->linesize);
3663 if(!s->first_slice_line) {
3664 s->dsp.vc1_v_overlap(s->dest[0], s->linesize);
3665 s->dsp.vc1_v_overlap(s->dest[0] + 8, s->linesize);
3666 if(!(s->flags & CODEC_FLAG_GRAY)) {
3667 s->dsp.vc1_v_overlap(s->dest[1], s->uvlinesize);
3668 s->dsp.vc1_v_overlap(s->dest[2], s->uvlinesize);
3671 s->dsp.vc1_v_overlap(s->dest[0] + 8 * s->linesize, s->linesize);
3672 s->dsp.vc1_v_overlap(s->dest[0] + 8 * s->linesize + 8, s->linesize);
3675 if(get_bits_count(&s->gb) > v->bits) {
3676 av_log(s->avctx, AV_LOG_ERROR, "Bits overconsumption: %i > %i\n", get_bits_count(&s->gb), v->bits);
3680 ff_draw_horiz_band(s, s->mb_y * 16, 16);
3681 s->first_slice_line = 0;
3685 static void vc1_decode_p_blocks(VC1Context *v)
3687 MpegEncContext *s = &v->s;
3689 /* select codingmode used for VLC tables selection */
3690 switch(v->c_ac_table_index){
3692 v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;
3695 v->codingset = CS_HIGH_MOT_INTRA;
3698 v->codingset = CS_MID_RATE_INTRA;
3702 switch(v->c_ac_table_index){
3704 v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;
3707 v->codingset2 = CS_HIGH_MOT_INTER;
3710 v->codingset2 = CS_MID_RATE_INTER;
3714 ff_er_add_slice(s, 0, 0, s->mb_width - 1, s->mb_height - 1, (AC_END|DC_END|MV_END));
3715 s->first_slice_line = 1;
3716 for(s->mb_y = 0; s->mb_y < s->mb_height; s->mb_y++) {
3717 for(s->mb_x = 0; s->mb_x < s->mb_width; s->mb_x++) {
3718 ff_init_block_index(s);
3719 ff_update_block_index(s);
3720 s->dsp.clear_blocks(s->block[0]);
3723 if(get_bits_count(&s->gb) > v->bits || get_bits_count(&s->gb) < 0) {
3724 av_log(s->avctx, AV_LOG_ERROR, "Bits overconsumption: %i > %i at %ix%i\n", get_bits_count(&s->gb), v->bits,s->mb_x,s->mb_y);
3728 ff_draw_horiz_band(s, s->mb_y * 16, 16);
3729 s->first_slice_line = 0;
3733 static void vc1_decode_b_blocks(VC1Context *v)
3735 MpegEncContext *s = &v->s;
3737 /* select codingmode used for VLC tables selection */
3738 switch(v->c_ac_table_index){
3740 v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;
3743 v->codingset = CS_HIGH_MOT_INTRA;
3746 v->codingset = CS_MID_RATE_INTRA;
3750 switch(v->c_ac_table_index){
3752 v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;
3755 v->codingset2 = CS_HIGH_MOT_INTER;
3758 v->codingset2 = CS_MID_RATE_INTER;
3762 ff_er_add_slice(s, 0, 0, s->mb_width - 1, s->mb_height - 1, (AC_END|DC_END|MV_END));
3763 s->first_slice_line = 1;
3764 for(s->mb_y = 0; s->mb_y < s->mb_height; s->mb_y++) {
3765 for(s->mb_x = 0; s->mb_x < s->mb_width; s->mb_x++) {
3766 ff_init_block_index(s);
3767 ff_update_block_index(s);
3768 s->dsp.clear_blocks(s->block[0]);
3771 if(get_bits_count(&s->gb) > v->bits || get_bits_count(&s->gb) < 0) {
3772 av_log(s->avctx, AV_LOG_ERROR, "Bits overconsumption: %i > %i at %ix%i\n", get_bits_count(&s->gb), v->bits,s->mb_x,s->mb_y);
3776 ff_draw_horiz_band(s, s->mb_y * 16, 16);
3777 s->first_slice_line = 0;
3781 static void vc1_decode_skip_blocks(VC1Context *v)
3783 MpegEncContext *s = &v->s;
3785 ff_er_add_slice(s, 0, 0, s->mb_width - 1, s->mb_height - 1, (AC_END|DC_END|MV_END));
3786 s->first_slice_line = 1;
3787 for(s->mb_y = 0; s->mb_y < s->mb_height; s->mb_y++) {
3789 ff_init_block_index(s);
3790 ff_update_block_index(s);
3791 memcpy(s->dest[0], s->last_picture.data[0] + s->mb_y * 16 * s->linesize, s->linesize * 16);
3792 memcpy(s->dest[1], s->last_picture.data[1] + s->mb_y * 8 * s->uvlinesize, s->uvlinesize * 8);
3793 memcpy(s->dest[2], s->last_picture.data[2] + s->mb_y * 8 * s->uvlinesize, s->uvlinesize * 8);
3794 ff_draw_horiz_band(s, s->mb_y * 16, 16);
3795 s->first_slice_line = 0;
3797 s->pict_type = P_TYPE;
3800 static void vc1_decode_blocks(VC1Context *v)
3803 v->s.esc3_level_length = 0;
3805 switch(v->s.pict_type) {
3807 if(v->profile == PROFILE_ADVANCED)
3808 vc1_decode_i_blocks_adv(v);
3810 vc1_decode_i_blocks(v);
3813 if(v->p_frame_skipped)
3814 vc1_decode_skip_blocks(v);
3816 vc1_decode_p_blocks(v);
3820 if(v->profile == PROFILE_ADVANCED)
3821 vc1_decode_i_blocks_adv(v);
3823 vc1_decode_i_blocks(v);
3825 vc1_decode_b_blocks(v);
3830 /** Find VC-1 marker in buffer
3831 * @return position where next marker starts or end of buffer if no marker found
3833 static av_always_inline uint8_t* find_next_marker(uint8_t *src, uint8_t *end)
3835 uint32_t mrk = 0xFFFFFFFF;
3837 if(end-src < 4) return end;
3839 mrk = (mrk << 8) | *src++;
3846 static av_always_inline int vc1_unescape_buffer(uint8_t *src, int size, uint8_t *dst)
3851 for(dsize = 0; dsize < size; dsize++) *dst++ = *src++;
3854 for(i = 0; i < size; i++, src++) {
3855 if(src[0] == 3 && i >= 2 && !src[-1] && !src[-2] && i < size-1 && src[1] < 4) {
3856 dst[dsize++] = src[1];
3860 dst[dsize++] = *src;
3865 /** Initialize a VC1/WMV3 decoder
3866 * @todo TODO: Handle VC-1 IDUs (Transport level?)
3867 * @todo TODO: Decypher remaining bits in extra_data
3869 static int vc1_decode_init(AVCodecContext *avctx)
3871 VC1Context *v = avctx->priv_data;
3872 MpegEncContext *s = &v->s;
3875 if (!avctx->extradata_size || !avctx->extradata) return -1;
3876 if (!(avctx->flags & CODEC_FLAG_GRAY))
3877 avctx->pix_fmt = PIX_FMT_YUV420P;
3879 avctx->pix_fmt = PIX_FMT_GRAY8;
3881 avctx->flags |= CODEC_FLAG_EMU_EDGE;
3882 v->s.flags |= CODEC_FLAG_EMU_EDGE;
3884 if(ff_h263_decode_init(avctx) < 0)
3886 if (vc1_init_common(v) < 0) return -1;
3888 avctx->coded_width = avctx->width;
3889 avctx->coded_height = avctx->height;
3890 if (avctx->codec_id == CODEC_ID_WMV3)
3894 // looks like WMV3 has a sequence header stored in the extradata
3895 // advanced sequence header may be before the first frame
3896 // the last byte of the extradata is a version number, 1 for the
3897 // samples we can decode
3899 init_get_bits(&gb, avctx->extradata, avctx->extradata_size*8);
3901 if (decode_sequence_header(avctx, &gb) < 0)
3904 count = avctx->extradata_size*8 - get_bits_count(&gb);
3907 av_log(avctx, AV_LOG_INFO, "Extra data: %i bits left, value: %X\n",
3908 count, get_bits(&gb, count));
3912 av_log(avctx, AV_LOG_INFO, "Read %i bits in overflow\n", -count);
3914 } else { // VC1/WVC1
3915 uint8_t *start = avctx->extradata, *end = avctx->extradata + avctx->extradata_size;
3916 uint8_t *next; int size, buf2_size;
3917 uint8_t *buf2 = NULL;
3918 int seq_inited = 0, ep_inited = 0;
3920 if(avctx->extradata_size < 16) {
3921 av_log(avctx, AV_LOG_ERROR, "Extradata size too small: %i\n", avctx->extradata_size);
3925 buf2 = av_mallocz(avctx->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
3926 if(start[0]) start++; // in WVC1 extradata first byte is its size
3928 for(; next < end; start = next){
3929 next = find_next_marker(start + 4, end);
3930 size = next - start - 4;
3931 if(size <= 0) continue;
3932 buf2_size = vc1_unescape_buffer(start + 4, size, buf2);
3933 init_get_bits(&gb, buf2, buf2_size * 8);
3934 switch(AV_RB32(start)){
3935 case VC1_CODE_SEQHDR:
3936 if(decode_sequence_header(avctx, &gb) < 0){
3942 case VC1_CODE_ENTRYPOINT:
3943 if(decode_entry_point(avctx, &gb) < 0){
3952 if(!seq_inited || !ep_inited){
3953 av_log(avctx, AV_LOG_ERROR, "Incomplete extradata\n");
3957 avctx->has_b_frames= !!(avctx->max_b_frames);
3958 s->low_delay = !avctx->has_b_frames;
3960 s->mb_width = (avctx->coded_width+15)>>4;
3961 s->mb_height = (avctx->coded_height+15)>>4;
3963 /* Allocate mb bitplanes */
3964 v->mv_type_mb_plane = av_malloc(s->mb_stride * s->mb_height);
3965 v->direct_mb_plane = av_malloc(s->mb_stride * s->mb_height);
3966 v->acpred_plane = av_malloc(s->mb_stride * s->mb_height);
3967 v->over_flags_plane = av_malloc(s->mb_stride * s->mb_height);
3969 /* allocate block type info in that way so it could be used with s->block_index[] */
3970 v->mb_type_base = av_malloc(s->b8_stride * (s->mb_height * 2 + 1) + s->mb_stride * (s->mb_height + 1) * 2);
3971 v->mb_type[0] = v->mb_type_base + s->b8_stride + 1;
3972 v->mb_type[1] = v->mb_type_base + s->b8_stride * (s->mb_height * 2 + 1) + s->mb_stride + 1;
3973 v->mb_type[2] = v->mb_type[1] + s->mb_stride * (s->mb_height + 1);
3975 /* Init coded blocks info */
3976 if (v->profile == PROFILE_ADVANCED)
3978 // if (alloc_bitplane(&v->over_flags_plane, s->mb_width, s->mb_height) < 0)
3980 // if (alloc_bitplane(&v->ac_pred_plane, s->mb_width, s->mb_height) < 0)
3988 /** Decode a VC1/WMV3 frame
3989 * @todo TODO: Handle VC-1 IDUs (Transport level?)
3991 static int vc1_decode_frame(AVCodecContext *avctx,
3992 void *data, int *data_size,
3993 uint8_t *buf, int buf_size)
3995 VC1Context *v = avctx->priv_data;
3996 MpegEncContext *s = &v->s;
3997 AVFrame *pict = data;
3998 uint8_t *buf2 = NULL;
4000 /* no supplementary picture */
4001 if (buf_size == 0) {
4002 /* special case for last picture */
4003 if (s->low_delay==0 && s->next_picture_ptr) {
4004 *pict= *(AVFrame*)s->next_picture_ptr;
4005 s->next_picture_ptr= NULL;
4007 *data_size = sizeof(AVFrame);
4013 /* We need to set current_picture_ptr before reading the header,
4014 * otherwise we cannot store anything in there. */
4015 if(s->current_picture_ptr==NULL || s->current_picture_ptr->data[0]){
4016 int i= ff_find_unused_picture(s, 0);
4017 s->current_picture_ptr= &s->picture[i];
4020 //for advanced profile we may need to parse and unescape data
4021 if (avctx->codec_id == CODEC_ID_VC1) {
4023 buf2 = av_mallocz(buf_size + FF_INPUT_BUFFER_PADDING_SIZE);
4025 if(IS_MARKER(AV_RB32(buf))){ /* frame starts with marker and needs to be parsed */
4026 uint8_t *start, *end, *next;
4030 for(start = buf, end = buf + buf_size; next < end; start = next){
4031 next = find_next_marker(start + 4, end);
4032 size = next - start - 4;
4033 if(size <= 0) continue;
4034 switch(AV_RB32(start)){
4035 case VC1_CODE_FRAME:
4036 buf_size2 = vc1_unescape_buffer(start + 4, size, buf2);
4038 case VC1_CODE_ENTRYPOINT: /* it should be before frame data */
4039 buf_size2 = vc1_unescape_buffer(start + 4, size, buf2);
4040 init_get_bits(&s->gb, buf2, buf_size2*8);
4041 decode_entry_point(avctx, &s->gb);
4043 case VC1_CODE_SLICE:
4044 av_log(avctx, AV_LOG_ERROR, "Sliced decoding is not implemented (yet)\n");
4049 }else if(v->interlace && ((buf[0] & 0xC0) == 0xC0)){ /* WVC1 interlaced stores both fields divided by marker */
4052 divider = find_next_marker(buf, buf + buf_size);
4053 if((divider == (buf + buf_size)) || AV_RB32(divider) != VC1_CODE_FIELD){
4054 av_log(avctx, AV_LOG_ERROR, "Error in WVC1 interlaced frame\n");
4058 buf_size2 = vc1_unescape_buffer(buf, divider - buf, buf2);
4060 av_free(buf2);return -1;
4062 buf_size2 = vc1_unescape_buffer(buf, buf_size, buf2);
4064 init_get_bits(&s->gb, buf2, buf_size2*8);
4066 init_get_bits(&s->gb, buf, buf_size*8);
4067 // do parse frame header
4068 if(v->profile < PROFILE_ADVANCED) {
4069 if(vc1_parse_frame_header(v, &s->gb) == -1) {
4074 if(vc1_parse_frame_header_adv(v, &s->gb) == -1) {
4080 if(s->pict_type != I_TYPE && !v->res_rtm_flag){
4086 s->current_picture.pict_type= s->pict_type;
4087 s->current_picture.key_frame= s->pict_type == I_TYPE;
4089 /* skip B-frames if we don't have reference frames */
4090 if(s->last_picture_ptr==NULL && (s->pict_type==B_TYPE || s->dropable)){
4092 return -1;//buf_size;
4094 /* skip b frames if we are in a hurry */
4095 if(avctx->hurry_up && s->pict_type==B_TYPE) return -1;//buf_size;
4096 if( (avctx->skip_frame >= AVDISCARD_NONREF && s->pict_type==B_TYPE)
4097 || (avctx->skip_frame >= AVDISCARD_NONKEY && s->pict_type!=I_TYPE)
4098 || avctx->skip_frame >= AVDISCARD_ALL) {
4102 /* skip everything if we are in a hurry>=5 */
4103 if(avctx->hurry_up>=5) {
4105 return -1;//buf_size;
4108 if(s->next_p_frame_damaged){
4109 if(s->pict_type==B_TYPE)
4112 s->next_p_frame_damaged=0;
4115 if(MPV_frame_start(s, avctx) < 0) {
4120 ff_er_frame_start(s);
4122 v->bits = buf_size * 8;
4123 vc1_decode_blocks(v);
4124 //av_log(s->avctx, AV_LOG_INFO, "Consumed %i/%i bits\n", get_bits_count(&s->gb), buf_size*8);
4125 // if(get_bits_count(&s->gb) > buf_size * 8)
4131 assert(s->current_picture.pict_type == s->current_picture_ptr->pict_type);
4132 assert(s->current_picture.pict_type == s->pict_type);
4133 if (s->pict_type == B_TYPE || s->low_delay) {
4134 *pict= *(AVFrame*)s->current_picture_ptr;
4135 } else if (s->last_picture_ptr != NULL) {
4136 *pict= *(AVFrame*)s->last_picture_ptr;
4139 if(s->last_picture_ptr || s->low_delay){
4140 *data_size = sizeof(AVFrame);
4141 ff_print_debug_info(s, pict);
4144 /* Return the Picture timestamp as the frame number */
4145 /* we substract 1 because it is added on utils.c */
4146 avctx->frame_number = s->picture_number - 1;
4153 /** Close a VC1/WMV3 decoder
4154 * @warning Initial try at using MpegEncContext stuff
4156 static int vc1_decode_end(AVCodecContext *avctx)
4158 VC1Context *v = avctx->priv_data;
4160 av_freep(&v->hrd_rate);
4161 av_freep(&v->hrd_buffer);
4162 MPV_common_end(&v->s);
4163 av_freep(&v->mv_type_mb_plane);
4164 av_freep(&v->direct_mb_plane);
4165 av_freep(&v->acpred_plane);
4166 av_freep(&v->over_flags_plane);
4167 av_freep(&v->mb_type_base);
4172 AVCodec vc1_decoder = {
4185 AVCodec wmv3_decoder = {