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
25 * VC-1 and WMV3 decoder
30 #include "mpegvideo.h"
33 #include "vc1acdata.h"
34 #include "msmpeg4data.h"
39 #define MB_INTRA_VLC_BITS 9
42 static const uint16_t table_mb_intra[64][2];
46 * Get unary code of limited length
47 * @fixme FIXME Slow and ugly
48 * @param gb GetBitContext
49 * @param[in] stop The bitstop value (unary code of 1's or 0's)
50 * @param[in] len Maximum length
51 * @return Unary length/index
53 static int get_prefix(GetBitContext *gb, int stop, int len)
58 for(i = 0; i < len && get_bits1(gb) != stop; i++);
60 /* int i = 0, tmp = !stop;
62 while (i != len && tmp != stop)
64 tmp = get_bits(gb, 1);
67 if (i == len && tmp != stop) return len+1;
75 buf=GET_CACHE(re, gb); //Still not sure
78 log= av_log2(-buf); //FIXME: -?
80 LAST_SKIP_BITS(re, gb, log+1);
85 LAST_SKIP_BITS(re, gb, limit);
91 static inline int decode210(GetBitContext *gb){
95 return 2 - get_bits1(gb);
99 * Init VC-1 specific tables and VC1Context members
100 * @param v The VC1Context to initialize
103 static int vc1_init_common(VC1Context *v)
108 v->hrd_rate = v->hrd_buffer = NULL;
114 init_vlc(&ff_vc1_bfraction_vlc, VC1_BFRACTION_VLC_BITS, 23,
115 ff_vc1_bfraction_bits, 1, 1,
116 ff_vc1_bfraction_codes, 1, 1, 1);
117 init_vlc(&ff_vc1_norm2_vlc, VC1_NORM2_VLC_BITS, 4,
118 ff_vc1_norm2_bits, 1, 1,
119 ff_vc1_norm2_codes, 1, 1, 1);
120 init_vlc(&ff_vc1_norm6_vlc, VC1_NORM6_VLC_BITS, 64,
121 ff_vc1_norm6_bits, 1, 1,
122 ff_vc1_norm6_codes, 2, 2, 1);
123 init_vlc(&ff_vc1_imode_vlc, VC1_IMODE_VLC_BITS, 7,
124 ff_vc1_imode_bits, 1, 1,
125 ff_vc1_imode_codes, 1, 1, 1);
128 init_vlc(&ff_vc1_ttmb_vlc[i], VC1_TTMB_VLC_BITS, 16,
129 ff_vc1_ttmb_bits[i], 1, 1,
130 ff_vc1_ttmb_codes[i], 2, 2, 1);
131 init_vlc(&ff_vc1_ttblk_vlc[i], VC1_TTBLK_VLC_BITS, 8,
132 ff_vc1_ttblk_bits[i], 1, 1,
133 ff_vc1_ttblk_codes[i], 1, 1, 1);
134 init_vlc(&ff_vc1_subblkpat_vlc[i], VC1_SUBBLKPAT_VLC_BITS, 15,
135 ff_vc1_subblkpat_bits[i], 1, 1,
136 ff_vc1_subblkpat_codes[i], 1, 1, 1);
140 init_vlc(&ff_vc1_4mv_block_pattern_vlc[i], VC1_4MV_BLOCK_PATTERN_VLC_BITS, 16,
141 ff_vc1_4mv_block_pattern_bits[i], 1, 1,
142 ff_vc1_4mv_block_pattern_codes[i], 1, 1, 1);
143 init_vlc(&ff_vc1_cbpcy_p_vlc[i], VC1_CBPCY_P_VLC_BITS, 64,
144 ff_vc1_cbpcy_p_bits[i], 1, 1,
145 ff_vc1_cbpcy_p_codes[i], 2, 2, 1);
146 init_vlc(&ff_vc1_mv_diff_vlc[i], VC1_MV_DIFF_VLC_BITS, 73,
147 ff_vc1_mv_diff_bits[i], 1, 1,
148 ff_vc1_mv_diff_codes[i], 2, 2, 1);
151 init_vlc(&ff_vc1_ac_coeff_table[i], AC_VLC_BITS, vc1_ac_sizes[i],
152 &vc1_ac_tables[i][0][1], 8, 4,
153 &vc1_ac_tables[i][0][0], 8, 4, 1);
154 init_vlc(&ff_msmp4_mb_i_vlc, MB_INTRA_VLC_BITS, 64,
155 &ff_msmp4_mb_i_table[0][1], 4, 2,
156 &ff_msmp4_mb_i_table[0][0], 4, 2, 1);
161 v->mvrange = 0; /* 7.1.1.18, p80 */
166 /***********************************************************************/
168 * @defgroup bitplane VC9 Bitplane decoding
173 /** @addtogroup bitplane
186 /** @} */ //imode defines
188 /** Decode rows by checking if they are skipped
189 * @param plane Buffer to store decoded bits
190 * @param[in] width Width of this buffer
191 * @param[in] height Height of this buffer
192 * @param[in] stride of this buffer
194 static void decode_rowskip(uint8_t* plane, int width, int height, int stride, GetBitContext *gb){
197 for (y=0; y<height; y++){
198 if (!get_bits(gb, 1)) //rowskip
199 memset(plane, 0, width);
201 for (x=0; x<width; x++)
202 plane[x] = get_bits(gb, 1);
207 /** Decode columns by checking if they are skipped
208 * @param plane Buffer to store decoded bits
209 * @param[in] width Width of this buffer
210 * @param[in] height Height of this buffer
211 * @param[in] stride of this buffer
212 * @fixme FIXME: Optimize
214 static void decode_colskip(uint8_t* plane, int width, int height, int stride, GetBitContext *gb){
217 for (x=0; x<width; x++){
218 if (!get_bits(gb, 1)) //colskip
219 for (y=0; y<height; y++)
222 for (y=0; y<height; y++)
223 plane[y*stride] = get_bits(gb, 1);
228 /** Decode a bitplane's bits
229 * @param bp Bitplane where to store the decode bits
230 * @param v VC-1 context for bit reading and logging
232 * @fixme FIXME: Optimize
234 static int bitplane_decoding(uint8_t* data, int *raw_flag, VC1Context *v)
236 GetBitContext *gb = &v->s.gb;
238 int imode, x, y, code, offset;
239 uint8_t invert, *planep = data;
240 int width, height, stride;
242 width = v->s.mb_width;
243 height = v->s.mb_height;
244 stride = v->s.mb_stride;
245 invert = get_bits(gb, 1);
246 imode = get_vlc2(gb, ff_vc1_imode_vlc.table, VC1_IMODE_VLC_BITS, 1);
252 //Data is actually read in the MB layer (same for all tests == "raw")
253 *raw_flag = 1; //invert ignored
257 if ((height * width) & 1)
259 *planep++ = get_bits(gb, 1);
263 // decode bitplane as one long line
264 for (y = offset; y < height * width; y += 2) {
265 code = get_vlc2(gb, ff_vc1_norm2_vlc.table, VC1_NORM2_VLC_BITS, 1);
266 *planep++ = code & 1;
268 if(offset == width) {
270 planep += stride - width;
272 *planep++ = code >> 1;
274 if(offset == width) {
276 planep += stride - width;
282 if(!(height % 3) && (width % 3)) { // use 2x3 decoding
283 for(y = 0; y < height; y+= 3) {
284 for(x = width & 1; x < width; x += 2) {
285 code = get_vlc2(gb, ff_vc1_norm6_vlc.table, VC1_NORM6_VLC_BITS, 2);
287 av_log(v->s.avctx, AV_LOG_DEBUG, "invalid NORM-6 VLC\n");
290 planep[x + 0] = (code >> 0) & 1;
291 planep[x + 1] = (code >> 1) & 1;
292 planep[x + 0 + stride] = (code >> 2) & 1;
293 planep[x + 1 + stride] = (code >> 3) & 1;
294 planep[x + 0 + stride * 2] = (code >> 4) & 1;
295 planep[x + 1 + stride * 2] = (code >> 5) & 1;
297 planep += stride * 3;
299 if(width & 1) decode_colskip(data, 1, height, stride, &v->s.gb);
301 planep += (height & 1) * stride;
302 for(y = height & 1; y < height; y += 2) {
303 for(x = width % 3; x < width; x += 3) {
304 code = get_vlc2(gb, ff_vc1_norm6_vlc.table, VC1_NORM6_VLC_BITS, 2);
306 av_log(v->s.avctx, AV_LOG_DEBUG, "invalid NORM-6 VLC\n");
309 planep[x + 0] = (code >> 0) & 1;
310 planep[x + 1] = (code >> 1) & 1;
311 planep[x + 2] = (code >> 2) & 1;
312 planep[x + 0 + stride] = (code >> 3) & 1;
313 planep[x + 1 + stride] = (code >> 4) & 1;
314 planep[x + 2 + stride] = (code >> 5) & 1;
316 planep += stride * 2;
319 if(x) decode_colskip(data , x, height , stride, &v->s.gb);
320 if(height & 1) decode_rowskip(data+x, width - x, 1, stride, &v->s.gb);
324 decode_rowskip(data, width, height, stride, &v->s.gb);
327 decode_colskip(data, width, height, stride, &v->s.gb);
332 /* Applying diff operator */
333 if (imode == IMODE_DIFF2 || imode == IMODE_DIFF6)
337 for (x=1; x<width; x++)
338 planep[x] ^= planep[x-1];
339 for (y=1; y<height; y++)
342 planep[0] ^= planep[-stride];
343 for (x=1; x<width; x++)
345 if (planep[x-1] != planep[x-stride]) planep[x] ^= invert;
346 else planep[x] ^= planep[x-1];
353 for (x=0; x<stride*height; x++) planep[x] = !planep[x]; //FIXME stride
355 return (imode<<1) + invert;
358 /** @} */ //Bitplane group
360 /***********************************************************************/
361 /** VOP Dquant decoding
362 * @param v VC-1 Context
364 static int vop_dquant_decoding(VC1Context *v)
366 GetBitContext *gb = &v->s.gb;
372 pqdiff = get_bits(gb, 3);
373 if (pqdiff == 7) v->altpq = get_bits(gb, 5);
374 else v->altpq = v->pq + pqdiff + 1;
378 v->dquantfrm = get_bits(gb, 1);
381 v->dqprofile = get_bits(gb, 2);
382 switch (v->dqprofile)
384 case DQPROFILE_SINGLE_EDGE:
385 case DQPROFILE_DOUBLE_EDGES:
386 v->dqsbedge = get_bits(gb, 2);
388 case DQPROFILE_ALL_MBS:
389 v->dqbilevel = get_bits(gb, 1);
390 default: break; //Forbidden ?
392 if (v->dqbilevel || v->dqprofile != DQPROFILE_ALL_MBS)
394 pqdiff = get_bits(gb, 3);
395 if (pqdiff == 7) v->altpq = get_bits(gb, 5);
396 else v->altpq = v->pq + pqdiff + 1;
403 /** Put block onto picture
405 static void vc1_put_block(VC1Context *v, DCTELEM block[6][64])
409 DSPContext *dsp = &v->s.dsp;
413 for(k = 0; k < 6; k++)
414 for(j = 0; j < 8; j++)
415 for(i = 0; i < 8; i++)
416 block[k][i + j*8] = ((block[k][i + j*8] - 128) << 1) + 128;
419 ys = v->s.current_picture.linesize[0];
420 us = v->s.current_picture.linesize[1];
421 vs = v->s.current_picture.linesize[2];
424 dsp->put_pixels_clamped(block[0], Y, ys);
425 dsp->put_pixels_clamped(block[1], Y + 8, ys);
427 dsp->put_pixels_clamped(block[2], Y, ys);
428 dsp->put_pixels_clamped(block[3], Y + 8, ys);
430 if(!(v->s.flags & CODEC_FLAG_GRAY)) {
431 dsp->put_pixels_clamped(block[4], v->s.dest[1], us);
432 dsp->put_pixels_clamped(block[5], v->s.dest[2], vs);
436 /** Do motion compensation over 1 macroblock
437 * Mostly adapted hpel_motion and qpel_motion from mpegvideo.c
439 static void vc1_mc_1mv(VC1Context *v, int dir)
441 MpegEncContext *s = &v->s;
442 DSPContext *dsp = &v->s.dsp;
443 uint8_t *srcY, *srcU, *srcV;
444 int dxy, uvdxy, mx, my, uvmx, uvmy, src_x, src_y, uvsrc_x, uvsrc_y;
446 if(!v->s.last_picture.data[0])return;
448 mx = s->mv[dir][0][0];
449 my = s->mv[dir][0][1];
451 // store motion vectors for further use in B frames
452 if(s->pict_type == P_TYPE) {
453 s->current_picture.motion_val[1][s->block_index[0]][0] = mx;
454 s->current_picture.motion_val[1][s->block_index[0]][1] = my;
456 uvmx = (mx + ((mx & 3) == 3)) >> 1;
457 uvmy = (my + ((my & 3) == 3)) >> 1;
459 uvmx = uvmx + ((uvmx<0)?(uvmx&1):-(uvmx&1));
460 uvmy = uvmy + ((uvmy<0)?(uvmy&1):-(uvmy&1));
463 srcY = s->last_picture.data[0];
464 srcU = s->last_picture.data[1];
465 srcV = s->last_picture.data[2];
467 srcY = s->next_picture.data[0];
468 srcU = s->next_picture.data[1];
469 srcV = s->next_picture.data[2];
472 src_x = s->mb_x * 16 + (mx >> 2);
473 src_y = s->mb_y * 16 + (my >> 2);
474 uvsrc_x = s->mb_x * 8 + (uvmx >> 2);
475 uvsrc_y = s->mb_y * 8 + (uvmy >> 2);
477 if(v->profile != PROFILE_ADVANCED){
478 src_x = av_clip( src_x, -16, s->mb_width * 16);
479 src_y = av_clip( src_y, -16, s->mb_height * 16);
480 uvsrc_x = av_clip(uvsrc_x, -8, s->mb_width * 8);
481 uvsrc_y = av_clip(uvsrc_y, -8, s->mb_height * 8);
483 src_x = av_clip( src_x, -17, s->avctx->coded_width);
484 src_y = av_clip( src_y, -18, s->avctx->coded_height + 1);
485 uvsrc_x = av_clip(uvsrc_x, -8, s->avctx->coded_width >> 1);
486 uvsrc_y = av_clip(uvsrc_y, -8, s->avctx->coded_height >> 1);
489 srcY += src_y * s->linesize + src_x;
490 srcU += uvsrc_y * s->uvlinesize + uvsrc_x;
491 srcV += uvsrc_y * s->uvlinesize + uvsrc_x;
493 /* for grayscale we should not try to read from unknown area */
494 if(s->flags & CODEC_FLAG_GRAY) {
495 srcU = s->edge_emu_buffer + 18 * s->linesize;
496 srcV = s->edge_emu_buffer + 18 * s->linesize;
499 if(v->rangeredfrm || (v->mv_mode == MV_PMODE_INTENSITY_COMP)
500 || (unsigned)(src_x - s->mspel) > s->h_edge_pos - (mx&3) - 16 - s->mspel*3
501 || (unsigned)(src_y - s->mspel) > s->v_edge_pos - (my&3) - 16 - s->mspel*3){
502 uint8_t *uvbuf= s->edge_emu_buffer + 19 * s->linesize;
504 srcY -= s->mspel * (1 + s->linesize);
505 ff_emulated_edge_mc(s->edge_emu_buffer, srcY, s->linesize, 17+s->mspel*2, 17+s->mspel*2,
506 src_x - s->mspel, src_y - s->mspel, s->h_edge_pos, s->v_edge_pos);
507 srcY = s->edge_emu_buffer;
508 ff_emulated_edge_mc(uvbuf , srcU, s->uvlinesize, 8+1, 8+1,
509 uvsrc_x, uvsrc_y, s->h_edge_pos >> 1, s->v_edge_pos >> 1);
510 ff_emulated_edge_mc(uvbuf + 16, srcV, s->uvlinesize, 8+1, 8+1,
511 uvsrc_x, uvsrc_y, s->h_edge_pos >> 1, s->v_edge_pos >> 1);
514 /* if we deal with range reduction we need to scale source blocks */
520 for(j = 0; j < 17 + s->mspel*2; j++) {
521 for(i = 0; i < 17 + s->mspel*2; i++) src[i] = ((src[i] - 128) >> 1) + 128;
524 src = srcU; src2 = srcV;
525 for(j = 0; j < 9; j++) {
526 for(i = 0; i < 9; i++) {
527 src[i] = ((src[i] - 128) >> 1) + 128;
528 src2[i] = ((src2[i] - 128) >> 1) + 128;
530 src += s->uvlinesize;
531 src2 += s->uvlinesize;
534 /* if we deal with intensity compensation we need to scale source blocks */
535 if(v->mv_mode == MV_PMODE_INTENSITY_COMP) {
540 for(j = 0; j < 17 + s->mspel*2; j++) {
541 for(i = 0; i < 17 + s->mspel*2; i++) src[i] = v->luty[src[i]];
544 src = srcU; src2 = srcV;
545 for(j = 0; j < 9; j++) {
546 for(i = 0; i < 9; i++) {
547 src[i] = v->lutuv[src[i]];
548 src2[i] = v->lutuv[src2[i]];
550 src += s->uvlinesize;
551 src2 += s->uvlinesize;
554 srcY += s->mspel * (1 + s->linesize);
558 dxy = ((my & 3) << 2) | (mx & 3);
559 dsp->put_vc1_mspel_pixels_tab[dxy](s->dest[0] , srcY , s->linesize, v->rnd);
560 dsp->put_vc1_mspel_pixels_tab[dxy](s->dest[0] + 8, srcY + 8, s->linesize, v->rnd);
561 srcY += s->linesize * 8;
562 dsp->put_vc1_mspel_pixels_tab[dxy](s->dest[0] + 8 * s->linesize , srcY , s->linesize, v->rnd);
563 dsp->put_vc1_mspel_pixels_tab[dxy](s->dest[0] + 8 * s->linesize + 8, srcY + 8, s->linesize, v->rnd);
564 } else { // hpel mc - always used for luma
565 dxy = (my & 2) | ((mx & 2) >> 1);
568 dsp->put_pixels_tab[0][dxy](s->dest[0], srcY, s->linesize, 16);
570 dsp->put_no_rnd_pixels_tab[0][dxy](s->dest[0], srcY, s->linesize, 16);
573 if(s->flags & CODEC_FLAG_GRAY) return;
574 /* Chroma MC always uses qpel bilinear */
575 uvdxy = ((uvmy & 3) << 2) | (uvmx & 3);
579 dsp->put_h264_chroma_pixels_tab[0](s->dest[1], srcU, s->uvlinesize, 8, uvmx, uvmy);
580 dsp->put_h264_chroma_pixels_tab[0](s->dest[2], srcV, s->uvlinesize, 8, uvmx, uvmy);
582 dsp->put_no_rnd_h264_chroma_pixels_tab[0](s->dest[1], srcU, s->uvlinesize, 8, uvmx, uvmy);
583 dsp->put_no_rnd_h264_chroma_pixels_tab[0](s->dest[2], srcV, s->uvlinesize, 8, uvmx, uvmy);
587 /** Do motion compensation for 4-MV macroblock - luminance block
589 static void vc1_mc_4mv_luma(VC1Context *v, int n)
591 MpegEncContext *s = &v->s;
592 DSPContext *dsp = &v->s.dsp;
594 int dxy, mx, my, src_x, src_y;
597 if(!v->s.last_picture.data[0])return;
600 srcY = s->last_picture.data[0];
602 off = s->linesize * 4 * (n&2) + (n&1) * 8;
604 src_x = s->mb_x * 16 + (n&1) * 8 + (mx >> 2);
605 src_y = s->mb_y * 16 + (n&2) * 4 + (my >> 2);
607 if(v->profile != PROFILE_ADVANCED){
608 src_x = av_clip( src_x, -16, s->mb_width * 16);
609 src_y = av_clip( src_y, -16, s->mb_height * 16);
611 src_x = av_clip( src_x, -17, s->avctx->coded_width);
612 src_y = av_clip( src_y, -18, s->avctx->coded_height + 1);
615 srcY += src_y * s->linesize + src_x;
617 if(v->rangeredfrm || (v->mv_mode == MV_PMODE_INTENSITY_COMP)
618 || (unsigned)(src_x - s->mspel) > s->h_edge_pos - (mx&3) - 8 - s->mspel*2
619 || (unsigned)(src_y - s->mspel) > s->v_edge_pos - (my&3) - 8 - s->mspel*2){
620 srcY -= s->mspel * (1 + s->linesize);
621 ff_emulated_edge_mc(s->edge_emu_buffer, srcY, s->linesize, 9+s->mspel*2, 9+s->mspel*2,
622 src_x - s->mspel, src_y - s->mspel, s->h_edge_pos, s->v_edge_pos);
623 srcY = s->edge_emu_buffer;
624 /* if we deal with range reduction we need to scale source blocks */
630 for(j = 0; j < 9 + s->mspel*2; j++) {
631 for(i = 0; i < 9 + s->mspel*2; i++) src[i] = ((src[i] - 128) >> 1) + 128;
635 /* if we deal with intensity compensation we need to scale source blocks */
636 if(v->mv_mode == MV_PMODE_INTENSITY_COMP) {
641 for(j = 0; j < 9 + s->mspel*2; j++) {
642 for(i = 0; i < 9 + s->mspel*2; i++) src[i] = v->luty[src[i]];
646 srcY += s->mspel * (1 + s->linesize);
650 dxy = ((my & 3) << 2) | (mx & 3);
651 dsp->put_vc1_mspel_pixels_tab[dxy](s->dest[0] + off, srcY, s->linesize, v->rnd);
652 } else { // hpel mc - always used for luma
653 dxy = (my & 2) | ((mx & 2) >> 1);
655 dsp->put_pixels_tab[1][dxy](s->dest[0] + off, srcY, s->linesize, 8);
657 dsp->put_no_rnd_pixels_tab[1][dxy](s->dest[0] + off, srcY, s->linesize, 8);
661 static inline int median4(int a, int b, int c, int d)
664 if(c < d) return (FFMIN(b, d) + FFMAX(a, c)) / 2;
665 else return (FFMIN(b, c) + FFMAX(a, d)) / 2;
667 if(c < d) return (FFMIN(a, d) + FFMAX(b, c)) / 2;
668 else return (FFMIN(a, c) + FFMAX(b, d)) / 2;
673 /** Do motion compensation for 4-MV macroblock - both chroma blocks
675 static void vc1_mc_4mv_chroma(VC1Context *v)
677 MpegEncContext *s = &v->s;
678 DSPContext *dsp = &v->s.dsp;
679 uint8_t *srcU, *srcV;
680 int uvdxy, uvmx, uvmy, uvsrc_x, uvsrc_y;
681 int i, idx, tx = 0, ty = 0;
682 int mvx[4], mvy[4], intra[4];
683 static const int count[16] = { 0, 1, 1, 2, 1, 2, 2, 3, 1, 2, 2, 3, 2, 3, 3, 4};
685 if(!v->s.last_picture.data[0])return;
686 if(s->flags & CODEC_FLAG_GRAY) return;
688 for(i = 0; i < 4; i++) {
689 mvx[i] = s->mv[0][i][0];
690 mvy[i] = s->mv[0][i][1];
691 intra[i] = v->mb_type[0][s->block_index[i]];
694 /* calculate chroma MV vector from four luma MVs */
695 idx = (intra[3] << 3) | (intra[2] << 2) | (intra[1] << 1) | intra[0];
696 if(!idx) { // all blocks are inter
697 tx = median4(mvx[0], mvx[1], mvx[2], mvx[3]);
698 ty = median4(mvy[0], mvy[1], mvy[2], mvy[3]);
699 } else if(count[idx] == 1) { // 3 inter blocks
702 tx = mid_pred(mvx[1], mvx[2], mvx[3]);
703 ty = mid_pred(mvy[1], mvy[2], mvy[3]);
706 tx = mid_pred(mvx[0], mvx[2], mvx[3]);
707 ty = mid_pred(mvy[0], mvy[2], mvy[3]);
710 tx = mid_pred(mvx[0], mvx[1], mvx[3]);
711 ty = mid_pred(mvy[0], mvy[1], mvy[3]);
714 tx = mid_pred(mvx[0], mvx[1], mvx[2]);
715 ty = mid_pred(mvy[0], mvy[1], mvy[2]);
718 } else if(count[idx] == 2) {
720 for(i=0; i<3;i++) if(!intra[i]) {t1 = i; break;}
721 for(i= t1+1; i<4; i++)if(!intra[i]) {t2 = i; break;}
722 tx = (mvx[t1] + mvx[t2]) / 2;
723 ty = (mvy[t1] + mvy[t2]) / 2;
725 s->current_picture.motion_val[1][s->block_index[0]][0] = 0;
726 s->current_picture.motion_val[1][s->block_index[0]][1] = 0;
727 return; //no need to do MC for inter blocks
730 s->current_picture.motion_val[1][s->block_index[0]][0] = tx;
731 s->current_picture.motion_val[1][s->block_index[0]][1] = ty;
732 uvmx = (tx + ((tx&3) == 3)) >> 1;
733 uvmy = (ty + ((ty&3) == 3)) >> 1;
735 uvmx = uvmx + ((uvmx<0)?(uvmx&1):-(uvmx&1));
736 uvmy = uvmy + ((uvmy<0)?(uvmy&1):-(uvmy&1));
739 uvsrc_x = s->mb_x * 8 + (uvmx >> 2);
740 uvsrc_y = s->mb_y * 8 + (uvmy >> 2);
742 if(v->profile != PROFILE_ADVANCED){
743 uvsrc_x = av_clip(uvsrc_x, -8, s->mb_width * 8);
744 uvsrc_y = av_clip(uvsrc_y, -8, s->mb_height * 8);
746 uvsrc_x = av_clip(uvsrc_x, -8, s->avctx->coded_width >> 1);
747 uvsrc_y = av_clip(uvsrc_y, -8, s->avctx->coded_height >> 1);
750 srcU = s->last_picture.data[1] + uvsrc_y * s->uvlinesize + uvsrc_x;
751 srcV = s->last_picture.data[2] + uvsrc_y * s->uvlinesize + uvsrc_x;
752 if(v->rangeredfrm || (v->mv_mode == MV_PMODE_INTENSITY_COMP)
753 || (unsigned)uvsrc_x > (s->h_edge_pos >> 1) - 9
754 || (unsigned)uvsrc_y > (s->v_edge_pos >> 1) - 9){
755 ff_emulated_edge_mc(s->edge_emu_buffer , srcU, s->uvlinesize, 8+1, 8+1,
756 uvsrc_x, uvsrc_y, s->h_edge_pos >> 1, s->v_edge_pos >> 1);
757 ff_emulated_edge_mc(s->edge_emu_buffer + 16, srcV, s->uvlinesize, 8+1, 8+1,
758 uvsrc_x, uvsrc_y, s->h_edge_pos >> 1, s->v_edge_pos >> 1);
759 srcU = s->edge_emu_buffer;
760 srcV = s->edge_emu_buffer + 16;
762 /* if we deal with range reduction we need to scale source blocks */
767 src = srcU; src2 = srcV;
768 for(j = 0; j < 9; j++) {
769 for(i = 0; i < 9; i++) {
770 src[i] = ((src[i] - 128) >> 1) + 128;
771 src2[i] = ((src2[i] - 128) >> 1) + 128;
773 src += s->uvlinesize;
774 src2 += s->uvlinesize;
777 /* if we deal with intensity compensation we need to scale source blocks */
778 if(v->mv_mode == MV_PMODE_INTENSITY_COMP) {
782 src = srcU; src2 = srcV;
783 for(j = 0; j < 9; j++) {
784 for(i = 0; i < 9; i++) {
785 src[i] = v->lutuv[src[i]];
786 src2[i] = v->lutuv[src2[i]];
788 src += s->uvlinesize;
789 src2 += s->uvlinesize;
794 /* Chroma MC always uses qpel bilinear */
795 uvdxy = ((uvmy & 3) << 2) | (uvmx & 3);
799 dsp->put_h264_chroma_pixels_tab[0](s->dest[1], srcU, s->uvlinesize, 8, uvmx, uvmy);
800 dsp->put_h264_chroma_pixels_tab[0](s->dest[2], srcV, s->uvlinesize, 8, uvmx, uvmy);
802 dsp->put_no_rnd_h264_chroma_pixels_tab[0](s->dest[1], srcU, s->uvlinesize, 8, uvmx, uvmy);
803 dsp->put_no_rnd_h264_chroma_pixels_tab[0](s->dest[2], srcV, s->uvlinesize, 8, uvmx, uvmy);
807 static int decode_sequence_header_adv(VC1Context *v, GetBitContext *gb);
810 * Decode Simple/Main Profiles sequence header
811 * @see Figure 7-8, p16-17
812 * @param avctx Codec context
813 * @param gb GetBit context initialized from Codec context extra_data
816 static int decode_sequence_header(AVCodecContext *avctx, GetBitContext *gb)
818 VC1Context *v = avctx->priv_data;
820 av_log(avctx, AV_LOG_DEBUG, "Header: %0X\n", show_bits(gb, 32));
821 v->profile = get_bits(gb, 2);
822 if (v->profile == PROFILE_COMPLEX)
824 av_log(avctx, AV_LOG_ERROR, "WMV3 Complex Profile is not fully supported\n");
827 if (v->profile == PROFILE_ADVANCED)
829 return decode_sequence_header_adv(v, gb);
833 v->res_sm = get_bits(gb, 2); //reserved
836 av_log(avctx, AV_LOG_ERROR,
837 "Reserved RES_SM=%i is forbidden\n", v->res_sm);
843 v->frmrtq_postproc = get_bits(gb, 3); //common
844 // (bitrate-32kbps)/64kbps
845 v->bitrtq_postproc = get_bits(gb, 5); //common
846 v->s.loop_filter = get_bits(gb, 1); //common
847 if(v->s.loop_filter == 1 && v->profile == PROFILE_SIMPLE)
849 av_log(avctx, AV_LOG_ERROR,
850 "LOOPFILTER shell not be enabled in simple profile\n");
853 v->res_x8 = get_bits(gb, 1); //reserved
856 av_log(avctx, AV_LOG_ERROR,
857 "1 for reserved RES_X8 is forbidden\n");
860 v->multires = get_bits(gb, 1);
861 v->res_fasttx = get_bits(gb, 1);
864 av_log(avctx, AV_LOG_ERROR,
865 "0 for reserved RES_FASTTX is forbidden\n");
869 v->fastuvmc = get_bits(gb, 1); //common
870 if (!v->profile && !v->fastuvmc)
872 av_log(avctx, AV_LOG_ERROR,
873 "FASTUVMC unavailable in Simple Profile\n");
876 v->extended_mv = get_bits(gb, 1); //common
877 if (!v->profile && v->extended_mv)
879 av_log(avctx, AV_LOG_ERROR,
880 "Extended MVs unavailable in Simple Profile\n");
883 v->dquant = get_bits(gb, 2); //common
884 v->vstransform = get_bits(gb, 1); //common
886 v->res_transtab = get_bits(gb, 1);
889 av_log(avctx, AV_LOG_ERROR,
890 "1 for reserved RES_TRANSTAB is forbidden\n");
894 v->overlap = get_bits(gb, 1); //common
896 v->s.resync_marker = get_bits(gb, 1);
897 v->rangered = get_bits(gb, 1);
898 if (v->rangered && v->profile == PROFILE_SIMPLE)
900 av_log(avctx, AV_LOG_INFO,
901 "RANGERED should be set to 0 in simple profile\n");
904 v->s.max_b_frames = avctx->max_b_frames = get_bits(gb, 3); //common
905 v->quantizer_mode = get_bits(gb, 2); //common
907 v->finterpflag = get_bits(gb, 1); //common
908 v->res_rtm_flag = get_bits(gb, 1); //reserved
909 if (!v->res_rtm_flag)
911 // av_log(avctx, AV_LOG_ERROR,
912 // "0 for reserved RES_RTM_FLAG is forbidden\n");
913 av_log(avctx, AV_LOG_ERROR,
914 "Old WMV3 version detected, only I-frames will be decoded\n");
917 //TODO: figure out what they mean (always 0x402F)
918 if(!v->res_fasttx) skip_bits(gb, 16);
919 av_log(avctx, AV_LOG_DEBUG,
920 "Profile %i:\nfrmrtq_postproc=%i, bitrtq_postproc=%i\n"
921 "LoopFilter=%i, MultiRes=%i, FastUVMC=%i, Extended MV=%i\n"
922 "Rangered=%i, VSTransform=%i, Overlap=%i, SyncMarker=%i\n"
923 "DQuant=%i, Quantizer mode=%i, Max B frames=%i\n",
924 v->profile, v->frmrtq_postproc, v->bitrtq_postproc,
925 v->s.loop_filter, v->multires, v->fastuvmc, v->extended_mv,
926 v->rangered, v->vstransform, v->overlap, v->s.resync_marker,
927 v->dquant, v->quantizer_mode, avctx->max_b_frames
932 static int decode_sequence_header_adv(VC1Context *v, GetBitContext *gb)
935 v->level = get_bits(gb, 3);
938 av_log(v->s.avctx, AV_LOG_ERROR, "Reserved LEVEL %i\n",v->level);
940 v->chromaformat = get_bits(gb, 2);
941 if (v->chromaformat != 1)
943 av_log(v->s.avctx, AV_LOG_ERROR,
944 "Only 4:2:0 chroma format supported\n");
949 v->frmrtq_postproc = get_bits(gb, 3); //common
950 // (bitrate-32kbps)/64kbps
951 v->bitrtq_postproc = get_bits(gb, 5); //common
952 v->postprocflag = get_bits(gb, 1); //common
954 v->s.avctx->coded_width = (get_bits(gb, 12) + 1) << 1;
955 v->s.avctx->coded_height = (get_bits(gb, 12) + 1) << 1;
956 v->s.avctx->width = v->s.avctx->coded_width;
957 v->s.avctx->height = v->s.avctx->coded_height;
958 v->broadcast = get_bits1(gb);
959 v->interlace = get_bits1(gb);
960 v->tfcntrflag = get_bits1(gb);
961 v->finterpflag = get_bits1(gb);
962 get_bits1(gb); // reserved
964 v->s.h_edge_pos = v->s.avctx->coded_width;
965 v->s.v_edge_pos = v->s.avctx->coded_height;
967 av_log(v->s.avctx, AV_LOG_DEBUG,
968 "Advanced Profile level %i:\nfrmrtq_postproc=%i, bitrtq_postproc=%i\n"
969 "LoopFilter=%i, ChromaFormat=%i, Pulldown=%i, Interlace: %i\n"
970 "TFCTRflag=%i, FINTERPflag=%i\n",
971 v->level, v->frmrtq_postproc, v->bitrtq_postproc,
972 v->s.loop_filter, v->chromaformat, v->broadcast, v->interlace,
973 v->tfcntrflag, v->finterpflag
976 v->psf = get_bits1(gb);
977 if(v->psf) { //PsF, 6.1.13
978 av_log(v->s.avctx, AV_LOG_ERROR, "Progressive Segmented Frame mode: not supported (yet)\n");
981 v->s.max_b_frames = v->s.avctx->max_b_frames = 7;
982 if(get_bits1(gb)) { //Display Info - decoding is not affected by it
984 av_log(v->s.avctx, AV_LOG_DEBUG, "Display extended info:\n");
985 v->s.avctx->width = v->s.width = w = get_bits(gb, 14) + 1;
986 v->s.avctx->height = v->s.height = h = get_bits(gb, 14) + 1;
987 av_log(v->s.avctx, AV_LOG_DEBUG, "Display dimensions: %ix%i\n", w, h);
989 ar = get_bits(gb, 4);
991 v->s.avctx->sample_aspect_ratio = ff_vc1_pixel_aspect[ar];
995 v->s.avctx->sample_aspect_ratio = (AVRational){w, h};
998 if(get_bits1(gb)){ //framerate stuff
1000 v->s.avctx->time_base.num = 32;
1001 v->s.avctx->time_base.den = get_bits(gb, 16) + 1;
1004 nr = get_bits(gb, 8);
1005 dr = get_bits(gb, 4);
1006 if(nr && nr < 8 && dr && dr < 3){
1007 v->s.avctx->time_base.num = ff_vc1_fps_dr[dr - 1];
1008 v->s.avctx->time_base.den = ff_vc1_fps_nr[nr - 1] * 1000;
1014 v->color_prim = get_bits(gb, 8);
1015 v->transfer_char = get_bits(gb, 8);
1016 v->matrix_coef = get_bits(gb, 8);
1020 v->hrd_param_flag = get_bits1(gb);
1021 if(v->hrd_param_flag) {
1023 v->hrd_num_leaky_buckets = get_bits(gb, 5);
1024 get_bits(gb, 4); //bitrate exponent
1025 get_bits(gb, 4); //buffer size exponent
1026 for(i = 0; i < v->hrd_num_leaky_buckets; i++) {
1027 get_bits(gb, 16); //hrd_rate[n]
1028 get_bits(gb, 16); //hrd_buffer[n]
1034 static int decode_entry_point(AVCodecContext *avctx, GetBitContext *gb)
1036 VC1Context *v = avctx->priv_data;
1037 int i, blink, clentry, refdist;
1039 av_log(avctx, AV_LOG_DEBUG, "Entry point: %08X\n", show_bits_long(gb, 32));
1040 blink = get_bits1(gb); // broken link
1041 clentry = get_bits1(gb); // closed entry
1042 v->panscanflag = get_bits1(gb);
1043 refdist = get_bits1(gb); // refdist flag
1044 v->s.loop_filter = get_bits1(gb);
1045 v->fastuvmc = get_bits1(gb);
1046 v->extended_mv = get_bits1(gb);
1047 v->dquant = get_bits(gb, 2);
1048 v->vstransform = get_bits1(gb);
1049 v->overlap = get_bits1(gb);
1050 v->quantizer_mode = get_bits(gb, 2);
1052 if(v->hrd_param_flag){
1053 for(i = 0; i < v->hrd_num_leaky_buckets; i++) {
1054 get_bits(gb, 8); //hrd_full[n]
1059 avctx->coded_width = (get_bits(gb, 12)+1)<<1;
1060 avctx->coded_height = (get_bits(gb, 12)+1)<<1;
1063 v->extended_dmv = get_bits1(gb);
1065 av_log(avctx, AV_LOG_ERROR, "Luma scaling is not supported, expect wrong picture\n");
1066 skip_bits(gb, 3); // Y range, ignored for now
1069 av_log(avctx, AV_LOG_ERROR, "Chroma scaling is not supported, expect wrong picture\n");
1070 skip_bits(gb, 3); // UV range, ignored for now
1073 av_log(avctx, AV_LOG_DEBUG, "Entry point info:\n"
1074 "BrokenLink=%i, ClosedEntry=%i, PanscanFlag=%i\n"
1075 "RefDist=%i, Postproc=%i, FastUVMC=%i, ExtMV=%i\n"
1076 "DQuant=%i, VSTransform=%i, Overlap=%i, Qmode=%i\n",
1077 blink, clentry, v->panscanflag, refdist, v->s.loop_filter,
1078 v->fastuvmc, v->extended_mv, v->dquant, v->vstransform, v->overlap, v->quantizer_mode);
1083 static int vc1_parse_frame_header(VC1Context *v, GetBitContext* gb)
1085 int pqindex, lowquant, status;
1087 if(v->finterpflag) v->interpfrm = get_bits(gb, 1);
1088 skip_bits(gb, 2); //framecnt unused
1090 if (v->rangered) v->rangeredfrm = get_bits(gb, 1);
1091 v->s.pict_type = get_bits(gb, 1);
1092 if (v->s.avctx->max_b_frames) {
1093 if (!v->s.pict_type) {
1094 if (get_bits(gb, 1)) v->s.pict_type = I_TYPE;
1095 else v->s.pict_type = B_TYPE;
1096 } else v->s.pict_type = P_TYPE;
1097 } else v->s.pict_type = v->s.pict_type ? P_TYPE : I_TYPE;
1100 if(v->s.pict_type == B_TYPE) {
1101 v->bfraction = get_vlc2(gb, ff_vc1_bfraction_vlc.table, VC1_BFRACTION_VLC_BITS, 1);
1102 v->bfraction = ff_vc1_bfraction_lut[v->bfraction];
1103 if(v->bfraction == 0) {
1104 v->s.pict_type = BI_TYPE;
1107 if(v->s.pict_type == I_TYPE || v->s.pict_type == BI_TYPE)
1108 get_bits(gb, 7); // skip buffer fullness
1111 if(v->s.pict_type == I_TYPE || v->s.pict_type == BI_TYPE)
1113 if(v->s.pict_type == P_TYPE)
1116 /* Quantizer stuff */
1117 pqindex = get_bits(gb, 5);
1118 if (v->quantizer_mode == QUANT_FRAME_IMPLICIT)
1119 v->pq = ff_vc1_pquant_table[0][pqindex];
1121 v->pq = ff_vc1_pquant_table[1][pqindex];
1124 if (v->quantizer_mode == QUANT_FRAME_IMPLICIT)
1125 v->pquantizer = pqindex < 9;
1126 if (v->quantizer_mode == QUANT_NON_UNIFORM)
1128 v->pqindex = pqindex;
1129 if (pqindex < 9) v->halfpq = get_bits(gb, 1);
1131 if (v->quantizer_mode == QUANT_FRAME_EXPLICIT)
1132 v->pquantizer = get_bits(gb, 1);
1134 if (v->extended_mv == 1) v->mvrange = get_prefix(gb, 0, 3);
1135 v->k_x = v->mvrange + 9 + (v->mvrange >> 1); //k_x can be 9 10 12 13
1136 v->k_y = v->mvrange + 8; //k_y can be 8 9 10 11
1137 v->range_x = 1 << (v->k_x - 1);
1138 v->range_y = 1 << (v->k_y - 1);
1139 if (v->profile == PROFILE_ADVANCED)
1141 if (v->postprocflag) v->postproc = get_bits(gb, 1);
1144 if (v->multires && v->s.pict_type != B_TYPE) v->respic = get_bits(gb, 2);
1146 if(v->res_x8 && (v->s.pict_type == I_TYPE || v->s.pict_type == BI_TYPE)){
1147 if(get_bits1(gb))return -1;
1149 //av_log(v->s.avctx, AV_LOG_INFO, "%c Frame: QP=[%i]%i (+%i/2) %i\n",
1150 // (v->s.pict_type == P_TYPE) ? 'P' : ((v->s.pict_type == I_TYPE) ? 'I' : 'B'), pqindex, v->pq, v->halfpq, v->rangeredfrm);
1152 if(v->s.pict_type == I_TYPE || v->s.pict_type == P_TYPE) v->use_ic = 0;
1154 switch(v->s.pict_type) {
1156 if (v->pq < 5) v->tt_index = 0;
1157 else if(v->pq < 13) v->tt_index = 1;
1158 else v->tt_index = 2;
1160 lowquant = (v->pq > 12) ? 0 : 1;
1161 v->mv_mode = ff_vc1_mv_pmode_table[lowquant][get_prefix(gb, 1, 4)];
1162 if (v->mv_mode == MV_PMODE_INTENSITY_COMP)
1164 int scale, shift, i;
1165 v->mv_mode2 = ff_vc1_mv_pmode_table2[lowquant][get_prefix(gb, 1, 3)];
1166 v->lumscale = get_bits(gb, 6);
1167 v->lumshift = get_bits(gb, 6);
1169 /* fill lookup tables for intensity compensation */
1172 shift = (255 - v->lumshift * 2) << 6;
1173 if(v->lumshift > 31)
1176 scale = v->lumscale + 32;
1177 if(v->lumshift > 31)
1178 shift = (v->lumshift - 64) << 6;
1180 shift = v->lumshift << 6;
1182 for(i = 0; i < 256; i++) {
1183 v->luty[i] = av_clip_uint8((scale * i + shift + 32) >> 6);
1184 v->lutuv[i] = av_clip_uint8((scale * (i - 128) + 128*64 + 32) >> 6);
1187 if(v->mv_mode == MV_PMODE_1MV_HPEL || v->mv_mode == MV_PMODE_1MV_HPEL_BILIN)
1188 v->s.quarter_sample = 0;
1189 else if(v->mv_mode == MV_PMODE_INTENSITY_COMP) {
1190 if(v->mv_mode2 == MV_PMODE_1MV_HPEL || v->mv_mode2 == MV_PMODE_1MV_HPEL_BILIN)
1191 v->s.quarter_sample = 0;
1193 v->s.quarter_sample = 1;
1195 v->s.quarter_sample = 1;
1196 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));
1198 if ((v->mv_mode == MV_PMODE_INTENSITY_COMP &&
1199 v->mv_mode2 == MV_PMODE_MIXED_MV)
1200 || v->mv_mode == MV_PMODE_MIXED_MV)
1202 status = bitplane_decoding(v->mv_type_mb_plane, &v->mv_type_is_raw, v);
1203 if (status < 0) return -1;
1204 av_log(v->s.avctx, AV_LOG_DEBUG, "MB MV Type plane encoding: "
1205 "Imode: %i, Invert: %i\n", status>>1, status&1);
1207 v->mv_type_is_raw = 0;
1208 memset(v->mv_type_mb_plane, 0, v->s.mb_stride * v->s.mb_height);
1210 status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);
1211 if (status < 0) return -1;
1212 av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: "
1213 "Imode: %i, Invert: %i\n", status>>1, status&1);
1215 /* Hopefully this is correct for P frames */
1216 v->s.mv_table_index = get_bits(gb, 2); //but using ff_vc1_ tables
1217 v->cbpcy_vlc = &ff_vc1_cbpcy_p_vlc[get_bits(gb, 2)];
1221 av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");
1222 vop_dquant_decoding(v);
1225 v->ttfrm = 0; //FIXME Is that so ?
1228 v->ttmbf = get_bits(gb, 1);
1231 v->ttfrm = ff_vc1_ttfrm_to_tt[get_bits(gb, 2)];
1239 if (v->pq < 5) v->tt_index = 0;
1240 else if(v->pq < 13) v->tt_index = 1;
1241 else v->tt_index = 2;
1243 lowquant = (v->pq > 12) ? 0 : 1;
1244 v->mv_mode = get_bits1(gb) ? MV_PMODE_1MV : MV_PMODE_1MV_HPEL_BILIN;
1245 v->s.quarter_sample = (v->mv_mode == MV_PMODE_1MV);
1246 v->s.mspel = v->s.quarter_sample;
1248 status = bitplane_decoding(v->direct_mb_plane, &v->dmb_is_raw, v);
1249 if (status < 0) return -1;
1250 av_log(v->s.avctx, AV_LOG_DEBUG, "MB Direct Type plane encoding: "
1251 "Imode: %i, Invert: %i\n", status>>1, status&1);
1252 status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);
1253 if (status < 0) return -1;
1254 av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: "
1255 "Imode: %i, Invert: %i\n", status>>1, status&1);
1257 v->s.mv_table_index = get_bits(gb, 2);
1258 v->cbpcy_vlc = &ff_vc1_cbpcy_p_vlc[get_bits(gb, 2)];
1262 av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");
1263 vop_dquant_decoding(v);
1269 v->ttmbf = get_bits(gb, 1);
1272 v->ttfrm = ff_vc1_ttfrm_to_tt[get_bits(gb, 2)];
1282 v->c_ac_table_index = decode012(gb);
1283 if (v->s.pict_type == I_TYPE || v->s.pict_type == BI_TYPE)
1285 v->y_ac_table_index = decode012(gb);
1288 v->s.dc_table_index = get_bits(gb, 1);
1290 if(v->s.pict_type == BI_TYPE) {
1291 v->s.pict_type = B_TYPE;
1297 static int vc1_parse_frame_header_adv(VC1Context *v, GetBitContext* gb)
1299 int pqindex, lowquant;
1302 v->p_frame_skipped = 0;
1305 v->fcm = decode012(gb);
1306 if(v->fcm) return -1; // interlaced frames/fields are not implemented
1308 switch(get_prefix(gb, 0, 4)) {
1310 v->s.pict_type = P_TYPE;
1313 v->s.pict_type = B_TYPE;
1316 v->s.pict_type = I_TYPE;
1319 v->s.pict_type = BI_TYPE;
1322 v->s.pict_type = P_TYPE; // skipped pic
1323 v->p_frame_skipped = 1;
1329 if(!v->interlace || v->psf) {
1330 v->rptfrm = get_bits(gb, 2);
1332 v->tff = get_bits1(gb);
1333 v->rptfrm = get_bits1(gb);
1336 if(v->panscanflag) {
1339 v->rnd = get_bits1(gb);
1341 v->uvsamp = get_bits1(gb);
1342 if(v->finterpflag) v->interpfrm = get_bits(gb, 1);
1343 if(v->s.pict_type == B_TYPE) {
1344 v->bfraction = get_vlc2(gb, ff_vc1_bfraction_vlc.table, VC1_BFRACTION_VLC_BITS, 1);
1345 v->bfraction = ff_vc1_bfraction_lut[v->bfraction];
1346 if(v->bfraction == 0) {
1347 v->s.pict_type = BI_TYPE; /* XXX: should not happen here */
1350 pqindex = get_bits(gb, 5);
1351 v->pqindex = pqindex;
1352 if (v->quantizer_mode == QUANT_FRAME_IMPLICIT)
1353 v->pq = ff_vc1_pquant_table[0][pqindex];
1355 v->pq = ff_vc1_pquant_table[1][pqindex];
1358 if (v->quantizer_mode == QUANT_FRAME_IMPLICIT)
1359 v->pquantizer = pqindex < 9;
1360 if (v->quantizer_mode == QUANT_NON_UNIFORM)
1362 v->pqindex = pqindex;
1363 if (pqindex < 9) v->halfpq = get_bits(gb, 1);
1365 if (v->quantizer_mode == QUANT_FRAME_EXPLICIT)
1366 v->pquantizer = get_bits(gb, 1);
1368 if(v->s.pict_type == I_TYPE || v->s.pict_type == P_TYPE) v->use_ic = 0;
1370 switch(v->s.pict_type) {
1373 status = bitplane_decoding(v->acpred_plane, &v->acpred_is_raw, v);
1374 if (status < 0) return -1;
1375 av_log(v->s.avctx, AV_LOG_DEBUG, "ACPRED plane encoding: "
1376 "Imode: %i, Invert: %i\n", status>>1, status&1);
1377 v->condover = CONDOVER_NONE;
1378 if(v->overlap && v->pq <= 8) {
1379 v->condover = decode012(gb);
1380 if(v->condover == CONDOVER_SELECT) {
1381 status = bitplane_decoding(v->over_flags_plane, &v->overflg_is_raw, v);
1382 if (status < 0) return -1;
1383 av_log(v->s.avctx, AV_LOG_DEBUG, "CONDOVER plane encoding: "
1384 "Imode: %i, Invert: %i\n", status>>1, status&1);
1390 v->postproc = get_bits1(gb);
1391 if (v->extended_mv) v->mvrange = get_prefix(gb, 0, 3);
1392 else v->mvrange = 0;
1393 v->k_x = v->mvrange + 9 + (v->mvrange >> 1); //k_x can be 9 10 12 13
1394 v->k_y = v->mvrange + 8; //k_y can be 8 9 10 11
1395 v->range_x = 1 << (v->k_x - 1);
1396 v->range_y = 1 << (v->k_y - 1);
1398 if (v->pq < 5) v->tt_index = 0;
1399 else if(v->pq < 13) v->tt_index = 1;
1400 else v->tt_index = 2;
1402 lowquant = (v->pq > 12) ? 0 : 1;
1403 v->mv_mode = ff_vc1_mv_pmode_table[lowquant][get_prefix(gb, 1, 4)];
1404 if (v->mv_mode == MV_PMODE_INTENSITY_COMP)
1406 int scale, shift, i;
1407 v->mv_mode2 = ff_vc1_mv_pmode_table2[lowquant][get_prefix(gb, 1, 3)];
1408 v->lumscale = get_bits(gb, 6);
1409 v->lumshift = get_bits(gb, 6);
1410 /* fill lookup tables for intensity compensation */
1413 shift = (255 - v->lumshift * 2) << 6;
1414 if(v->lumshift > 31)
1417 scale = v->lumscale + 32;
1418 if(v->lumshift > 31)
1419 shift = (v->lumshift - 64) << 6;
1421 shift = v->lumshift << 6;
1423 for(i = 0; i < 256; i++) {
1424 v->luty[i] = av_clip_uint8((scale * i + shift + 32) >> 6);
1425 v->lutuv[i] = av_clip_uint8((scale * (i - 128) + 128*64 + 32) >> 6);
1429 if(v->mv_mode == MV_PMODE_1MV_HPEL || v->mv_mode == MV_PMODE_1MV_HPEL_BILIN)
1430 v->s.quarter_sample = 0;
1431 else if(v->mv_mode == MV_PMODE_INTENSITY_COMP) {
1432 if(v->mv_mode2 == MV_PMODE_1MV_HPEL || v->mv_mode2 == MV_PMODE_1MV_HPEL_BILIN)
1433 v->s.quarter_sample = 0;
1435 v->s.quarter_sample = 1;
1437 v->s.quarter_sample = 1;
1438 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));
1440 if ((v->mv_mode == MV_PMODE_INTENSITY_COMP &&
1441 v->mv_mode2 == MV_PMODE_MIXED_MV)
1442 || v->mv_mode == MV_PMODE_MIXED_MV)
1444 status = bitplane_decoding(v->mv_type_mb_plane, &v->mv_type_is_raw, v);
1445 if (status < 0) return -1;
1446 av_log(v->s.avctx, AV_LOG_DEBUG, "MB MV Type plane encoding: "
1447 "Imode: %i, Invert: %i\n", status>>1, status&1);
1449 v->mv_type_is_raw = 0;
1450 memset(v->mv_type_mb_plane, 0, v->s.mb_stride * v->s.mb_height);
1452 status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);
1453 if (status < 0) return -1;
1454 av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: "
1455 "Imode: %i, Invert: %i\n", status>>1, status&1);
1457 /* Hopefully this is correct for P frames */
1458 v->s.mv_table_index = get_bits(gb, 2); //but using ff_vc1_ tables
1459 v->cbpcy_vlc = &ff_vc1_cbpcy_p_vlc[get_bits(gb, 2)];
1462 av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");
1463 vop_dquant_decoding(v);
1466 v->ttfrm = 0; //FIXME Is that so ?
1469 v->ttmbf = get_bits(gb, 1);
1472 v->ttfrm = ff_vc1_ttfrm_to_tt[get_bits(gb, 2)];
1481 v->postproc = get_bits1(gb);
1482 if (v->extended_mv) v->mvrange = get_prefix(gb, 0, 3);
1483 else v->mvrange = 0;
1484 v->k_x = v->mvrange + 9 + (v->mvrange >> 1); //k_x can be 9 10 12 13
1485 v->k_y = v->mvrange + 8; //k_y can be 8 9 10 11
1486 v->range_x = 1 << (v->k_x - 1);
1487 v->range_y = 1 << (v->k_y - 1);
1489 if (v->pq < 5) v->tt_index = 0;
1490 else if(v->pq < 13) v->tt_index = 1;
1491 else v->tt_index = 2;
1493 lowquant = (v->pq > 12) ? 0 : 1;
1494 v->mv_mode = get_bits1(gb) ? MV_PMODE_1MV : MV_PMODE_1MV_HPEL_BILIN;
1495 v->s.quarter_sample = (v->mv_mode == MV_PMODE_1MV);
1496 v->s.mspel = v->s.quarter_sample;
1498 status = bitplane_decoding(v->direct_mb_plane, &v->dmb_is_raw, v);
1499 if (status < 0) return -1;
1500 av_log(v->s.avctx, AV_LOG_DEBUG, "MB Direct Type plane encoding: "
1501 "Imode: %i, Invert: %i\n", status>>1, status&1);
1502 status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);
1503 if (status < 0) return -1;
1504 av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: "
1505 "Imode: %i, Invert: %i\n", status>>1, status&1);
1507 v->s.mv_table_index = get_bits(gb, 2);
1508 v->cbpcy_vlc = &ff_vc1_cbpcy_p_vlc[get_bits(gb, 2)];
1512 av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");
1513 vop_dquant_decoding(v);
1519 v->ttmbf = get_bits(gb, 1);
1522 v->ttfrm = ff_vc1_ttfrm_to_tt[get_bits(gb, 2)];
1532 v->c_ac_table_index = decode012(gb);
1533 if (v->s.pict_type == I_TYPE || v->s.pict_type == BI_TYPE)
1535 v->y_ac_table_index = decode012(gb);
1538 v->s.dc_table_index = get_bits(gb, 1);
1539 if ((v->s.pict_type == I_TYPE || v->s.pict_type == BI_TYPE) && v->dquant) {
1540 av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");
1541 vop_dquant_decoding(v);
1545 if(v->s.pict_type == BI_TYPE) {
1546 v->s.pict_type = B_TYPE;
1552 /***********************************************************************/
1554 * @defgroup block VC-1 Block-level functions
1555 * @see 7.1.4, p91 and 8.1.1.7, p(1)04
1561 * @brief Get macroblock-level quantizer scale
1563 #define GET_MQUANT() \
1567 if (v->dqprofile == DQPROFILE_ALL_MBS) \
1571 mquant = (get_bits(gb, 1)) ? v->altpq : v->pq; \
1575 mqdiff = get_bits(gb, 3); \
1576 if (mqdiff != 7) mquant = v->pq + mqdiff; \
1577 else mquant = get_bits(gb, 5); \
1580 if(v->dqprofile == DQPROFILE_SINGLE_EDGE) \
1581 edges = 1 << v->dqsbedge; \
1582 else if(v->dqprofile == DQPROFILE_DOUBLE_EDGES) \
1583 edges = (3 << v->dqsbedge) % 15; \
1584 else if(v->dqprofile == DQPROFILE_FOUR_EDGES) \
1586 if((edges&1) && !s->mb_x) \
1587 mquant = v->altpq; \
1588 if((edges&2) && s->first_slice_line) \
1589 mquant = v->altpq; \
1590 if((edges&4) && s->mb_x == (s->mb_width - 1)) \
1591 mquant = v->altpq; \
1592 if((edges&8) && s->mb_y == (s->mb_height - 1)) \
1593 mquant = v->altpq; \
1597 * @def GET_MVDATA(_dmv_x, _dmv_y)
1598 * @brief Get MV differentials
1599 * @see MVDATA decoding from 8.3.5.2, p(1)20
1600 * @param _dmv_x Horizontal differential for decoded MV
1601 * @param _dmv_y Vertical differential for decoded MV
1603 #define GET_MVDATA(_dmv_x, _dmv_y) \
1604 index = 1 + get_vlc2(gb, ff_vc1_mv_diff_vlc[s->mv_table_index].table,\
1605 VC1_MV_DIFF_VLC_BITS, 2); \
1608 mb_has_coeffs = 1; \
1611 else mb_has_coeffs = 0; \
1613 if (!index) { _dmv_x = _dmv_y = 0; } \
1614 else if (index == 35) \
1616 _dmv_x = get_bits(gb, v->k_x - 1 + s->quarter_sample); \
1617 _dmv_y = get_bits(gb, v->k_y - 1 + s->quarter_sample); \
1619 else if (index == 36) \
1628 if (!s->quarter_sample && index1 == 5) val = 1; \
1630 if(size_table[index1] - val > 0) \
1631 val = get_bits(gb, size_table[index1] - val); \
1633 sign = 0 - (val&1); \
1634 _dmv_x = (sign ^ ((val>>1) + offset_table[index1])) - sign; \
1637 if (!s->quarter_sample && index1 == 5) val = 1; \
1639 if(size_table[index1] - val > 0) \
1640 val = get_bits(gb, size_table[index1] - val); \
1642 sign = 0 - (val&1); \
1643 _dmv_y = (sign ^ ((val>>1) + offset_table[index1])) - sign; \
1646 /** Predict and set motion vector
1648 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)
1650 int xy, wrap, off = 0;
1655 /* scale MV difference to be quad-pel */
1656 dmv_x <<= 1 - s->quarter_sample;
1657 dmv_y <<= 1 - s->quarter_sample;
1659 wrap = s->b8_stride;
1660 xy = s->block_index[n];
1663 s->mv[0][n][0] = s->current_picture.motion_val[0][xy][0] = 0;
1664 s->mv[0][n][1] = s->current_picture.motion_val[0][xy][1] = 0;
1665 s->current_picture.motion_val[1][xy][0] = 0;
1666 s->current_picture.motion_val[1][xy][1] = 0;
1667 if(mv1) { /* duplicate motion data for 1-MV block */
1668 s->current_picture.motion_val[0][xy + 1][0] = 0;
1669 s->current_picture.motion_val[0][xy + 1][1] = 0;
1670 s->current_picture.motion_val[0][xy + wrap][0] = 0;
1671 s->current_picture.motion_val[0][xy + wrap][1] = 0;
1672 s->current_picture.motion_val[0][xy + wrap + 1][0] = 0;
1673 s->current_picture.motion_val[0][xy + wrap + 1][1] = 0;
1674 s->current_picture.motion_val[1][xy + 1][0] = 0;
1675 s->current_picture.motion_val[1][xy + 1][1] = 0;
1676 s->current_picture.motion_val[1][xy + wrap][0] = 0;
1677 s->current_picture.motion_val[1][xy + wrap][1] = 0;
1678 s->current_picture.motion_val[1][xy + wrap + 1][0] = 0;
1679 s->current_picture.motion_val[1][xy + wrap + 1][1] = 0;
1684 C = s->current_picture.motion_val[0][xy - 1];
1685 A = s->current_picture.motion_val[0][xy - wrap];
1687 off = (s->mb_x == (s->mb_width - 1)) ? -1 : 2;
1689 //in 4-MV mode different blocks have different B predictor position
1692 off = (s->mb_x > 0) ? -1 : 1;
1695 off = (s->mb_x == (s->mb_width - 1)) ? -1 : 1;
1704 B = s->current_picture.motion_val[0][xy - wrap + off];
1706 if(!s->first_slice_line || (n==2 || n==3)) { // predictor A is not out of bounds
1707 if(s->mb_width == 1) {
1711 px = mid_pred(A[0], B[0], C[0]);
1712 py = mid_pred(A[1], B[1], C[1]);
1714 } else if(s->mb_x || (n==1 || n==3)) { // predictor C is not out of bounds
1720 /* Pullback MV as specified in 8.3.5.3.4 */
1723 qx = (s->mb_x << 6) + ((n==1 || n==3) ? 32 : 0);
1724 qy = (s->mb_y << 6) + ((n==2 || n==3) ? 32 : 0);
1725 X = (s->mb_width << 6) - 4;
1726 Y = (s->mb_height << 6) - 4;
1728 if(qx + px < -60) px = -60 - qx;
1729 if(qy + py < -60) py = -60 - qy;
1731 if(qx + px < -28) px = -28 - qx;
1732 if(qy + py < -28) py = -28 - qy;
1734 if(qx + px > X) px = X - qx;
1735 if(qy + py > Y) py = Y - qy;
1737 /* Calculate hybrid prediction as specified in 8.3.5.3.5 */
1738 if((!s->first_slice_line || (n==2 || n==3)) && (s->mb_x || (n==1 || n==3))) {
1739 if(is_intra[xy - wrap])
1740 sum = FFABS(px) + FFABS(py);
1742 sum = FFABS(px - A[0]) + FFABS(py - A[1]);
1744 if(get_bits1(&s->gb)) {
1752 if(is_intra[xy - 1])
1753 sum = FFABS(px) + FFABS(py);
1755 sum = FFABS(px - C[0]) + FFABS(py - C[1]);
1757 if(get_bits1(&s->gb)) {
1767 /* store MV using signed modulus of MV range defined in 4.11 */
1768 s->mv[0][n][0] = s->current_picture.motion_val[0][xy][0] = ((px + dmv_x + r_x) & ((r_x << 1) - 1)) - r_x;
1769 s->mv[0][n][1] = s->current_picture.motion_val[0][xy][1] = ((py + dmv_y + r_y) & ((r_y << 1) - 1)) - r_y;
1770 if(mv1) { /* duplicate motion data for 1-MV block */
1771 s->current_picture.motion_val[0][xy + 1][0] = s->current_picture.motion_val[0][xy][0];
1772 s->current_picture.motion_val[0][xy + 1][1] = s->current_picture.motion_val[0][xy][1];
1773 s->current_picture.motion_val[0][xy + wrap][0] = s->current_picture.motion_val[0][xy][0];
1774 s->current_picture.motion_val[0][xy + wrap][1] = s->current_picture.motion_val[0][xy][1];
1775 s->current_picture.motion_val[0][xy + wrap + 1][0] = s->current_picture.motion_val[0][xy][0];
1776 s->current_picture.motion_val[0][xy + wrap + 1][1] = s->current_picture.motion_val[0][xy][1];
1780 /** Motion compensation for direct or interpolated blocks in B-frames
1782 static void vc1_interp_mc(VC1Context *v)
1784 MpegEncContext *s = &v->s;
1785 DSPContext *dsp = &v->s.dsp;
1786 uint8_t *srcY, *srcU, *srcV;
1787 int dxy, uvdxy, mx, my, uvmx, uvmy, src_x, src_y, uvsrc_x, uvsrc_y;
1789 if(!v->s.next_picture.data[0])return;
1791 mx = s->mv[1][0][0];
1792 my = s->mv[1][0][1];
1793 uvmx = (mx + ((mx & 3) == 3)) >> 1;
1794 uvmy = (my + ((my & 3) == 3)) >> 1;
1796 uvmx = uvmx + ((uvmx<0)?-(uvmx&1):(uvmx&1));
1797 uvmy = uvmy + ((uvmy<0)?-(uvmy&1):(uvmy&1));
1799 srcY = s->next_picture.data[0];
1800 srcU = s->next_picture.data[1];
1801 srcV = s->next_picture.data[2];
1803 src_x = s->mb_x * 16 + (mx >> 2);
1804 src_y = s->mb_y * 16 + (my >> 2);
1805 uvsrc_x = s->mb_x * 8 + (uvmx >> 2);
1806 uvsrc_y = s->mb_y * 8 + (uvmy >> 2);
1808 if(v->profile != PROFILE_ADVANCED){
1809 src_x = av_clip( src_x, -16, s->mb_width * 16);
1810 src_y = av_clip( src_y, -16, s->mb_height * 16);
1811 uvsrc_x = av_clip(uvsrc_x, -8, s->mb_width * 8);
1812 uvsrc_y = av_clip(uvsrc_y, -8, s->mb_height * 8);
1814 src_x = av_clip( src_x, -17, s->avctx->coded_width);
1815 src_y = av_clip( src_y, -18, s->avctx->coded_height + 1);
1816 uvsrc_x = av_clip(uvsrc_x, -8, s->avctx->coded_width >> 1);
1817 uvsrc_y = av_clip(uvsrc_y, -8, s->avctx->coded_height >> 1);
1820 srcY += src_y * s->linesize + src_x;
1821 srcU += uvsrc_y * s->uvlinesize + uvsrc_x;
1822 srcV += uvsrc_y * s->uvlinesize + uvsrc_x;
1824 /* for grayscale we should not try to read from unknown area */
1825 if(s->flags & CODEC_FLAG_GRAY) {
1826 srcU = s->edge_emu_buffer + 18 * s->linesize;
1827 srcV = s->edge_emu_buffer + 18 * s->linesize;
1831 || (unsigned)src_x > s->h_edge_pos - (mx&3) - 16
1832 || (unsigned)src_y > s->v_edge_pos - (my&3) - 16){
1833 uint8_t *uvbuf= s->edge_emu_buffer + 19 * s->linesize;
1835 srcY -= s->mspel * (1 + s->linesize);
1836 ff_emulated_edge_mc(s->edge_emu_buffer, srcY, s->linesize, 17+s->mspel*2, 17+s->mspel*2,
1837 src_x - s->mspel, src_y - s->mspel, s->h_edge_pos, s->v_edge_pos);
1838 srcY = s->edge_emu_buffer;
1839 ff_emulated_edge_mc(uvbuf , srcU, s->uvlinesize, 8+1, 8+1,
1840 uvsrc_x, uvsrc_y, s->h_edge_pos >> 1, s->v_edge_pos >> 1);
1841 ff_emulated_edge_mc(uvbuf + 16, srcV, s->uvlinesize, 8+1, 8+1,
1842 uvsrc_x, uvsrc_y, s->h_edge_pos >> 1, s->v_edge_pos >> 1);
1845 /* if we deal with range reduction we need to scale source blocks */
1846 if(v->rangeredfrm) {
1848 uint8_t *src, *src2;
1851 for(j = 0; j < 17 + s->mspel*2; j++) {
1852 for(i = 0; i < 17 + s->mspel*2; i++) src[i] = ((src[i] - 128) >> 1) + 128;
1855 src = srcU; src2 = srcV;
1856 for(j = 0; j < 9; j++) {
1857 for(i = 0; i < 9; i++) {
1858 src[i] = ((src[i] - 128) >> 1) + 128;
1859 src2[i] = ((src2[i] - 128) >> 1) + 128;
1861 src += s->uvlinesize;
1862 src2 += s->uvlinesize;
1865 srcY += s->mspel * (1 + s->linesize);
1870 dxy = ((my & 1) << 1) | (mx & 1);
1872 dsp->avg_pixels_tab[0][dxy](s->dest[0], srcY, s->linesize, 16);
1874 if(s->flags & CODEC_FLAG_GRAY) return;
1875 /* Chroma MC always uses qpel blilinear */
1876 uvdxy = ((uvmy & 3) << 2) | (uvmx & 3);
1879 dsp->avg_h264_chroma_pixels_tab[0](s->dest[1], srcU, s->uvlinesize, 8, uvmx, uvmy);
1880 dsp->avg_h264_chroma_pixels_tab[0](s->dest[2], srcV, s->uvlinesize, 8, uvmx, uvmy);
1883 static av_always_inline int scale_mv(int value, int bfrac, int inv, int qs)
1887 #if B_FRACTION_DEN==256
1891 return 2 * ((value * n + 255) >> 9);
1892 return (value * n + 128) >> 8;
1895 n -= B_FRACTION_DEN;
1897 return 2 * ((value * n + B_FRACTION_DEN - 1) / (2 * B_FRACTION_DEN));
1898 return (value * n + B_FRACTION_DEN/2) / B_FRACTION_DEN;
1902 /** Reconstruct motion vector for B-frame and do motion compensation
1904 static inline void vc1_b_mc(VC1Context *v, int dmv_x[2], int dmv_y[2], int direct, int mode)
1907 v->mv_mode2 = v->mv_mode;
1908 v->mv_mode = MV_PMODE_INTENSITY_COMP;
1913 if(v->use_ic) v->mv_mode = v->mv_mode2;
1916 if(mode == BMV_TYPE_INTERPOLATED) {
1919 if(v->use_ic) v->mv_mode = v->mv_mode2;
1923 if(v->use_ic && (mode == BMV_TYPE_BACKWARD)) v->mv_mode = v->mv_mode2;
1924 vc1_mc_1mv(v, (mode == BMV_TYPE_BACKWARD));
1925 if(v->use_ic) v->mv_mode = v->mv_mode2;
1928 static inline void vc1_pred_b_mv(VC1Context *v, int dmv_x[2], int dmv_y[2], int direct, int mvtype)
1930 MpegEncContext *s = &v->s;
1931 int xy, wrap, off = 0;
1936 const uint8_t *is_intra = v->mb_type[0];
1940 /* scale MV difference to be quad-pel */
1941 dmv_x[0] <<= 1 - s->quarter_sample;
1942 dmv_y[0] <<= 1 - s->quarter_sample;
1943 dmv_x[1] <<= 1 - s->quarter_sample;
1944 dmv_y[1] <<= 1 - s->quarter_sample;
1946 wrap = s->b8_stride;
1947 xy = s->block_index[0];
1950 s->current_picture.motion_val[0][xy][0] =
1951 s->current_picture.motion_val[0][xy][1] =
1952 s->current_picture.motion_val[1][xy][0] =
1953 s->current_picture.motion_val[1][xy][1] = 0;
1956 s->mv[0][0][0] = scale_mv(s->next_picture.motion_val[1][xy][0], v->bfraction, 0, s->quarter_sample);
1957 s->mv[0][0][1] = scale_mv(s->next_picture.motion_val[1][xy][1], v->bfraction, 0, s->quarter_sample);
1958 s->mv[1][0][0] = scale_mv(s->next_picture.motion_val[1][xy][0], v->bfraction, 1, s->quarter_sample);
1959 s->mv[1][0][1] = scale_mv(s->next_picture.motion_val[1][xy][1], v->bfraction, 1, s->quarter_sample);
1961 /* Pullback predicted motion vectors as specified in 8.4.5.4 */
1962 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));
1963 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));
1964 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));
1965 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));
1967 s->current_picture.motion_val[0][xy][0] = s->mv[0][0][0];
1968 s->current_picture.motion_val[0][xy][1] = s->mv[0][0][1];
1969 s->current_picture.motion_val[1][xy][0] = s->mv[1][0][0];
1970 s->current_picture.motion_val[1][xy][1] = s->mv[1][0][1];
1974 if((mvtype == BMV_TYPE_FORWARD) || (mvtype == BMV_TYPE_INTERPOLATED)) {
1975 C = s->current_picture.motion_val[0][xy - 2];
1976 A = s->current_picture.motion_val[0][xy - wrap*2];
1977 off = (s->mb_x == (s->mb_width - 1)) ? -2 : 2;
1978 B = s->current_picture.motion_val[0][xy - wrap*2 + off];
1980 if(!s->mb_x) C[0] = C[1] = 0;
1981 if(!s->first_slice_line) { // predictor A is not out of bounds
1982 if(s->mb_width == 1) {
1986 px = mid_pred(A[0], B[0], C[0]);
1987 py = mid_pred(A[1], B[1], C[1]);
1989 } else if(s->mb_x) { // predictor C is not out of bounds
1995 /* Pullback MV as specified in 8.3.5.3.4 */
1998 if(v->profile < PROFILE_ADVANCED) {
1999 qx = (s->mb_x << 5);
2000 qy = (s->mb_y << 5);
2001 X = (s->mb_width << 5) - 4;
2002 Y = (s->mb_height << 5) - 4;
2003 if(qx + px < -28) px = -28 - qx;
2004 if(qy + py < -28) py = -28 - qy;
2005 if(qx + px > X) px = X - qx;
2006 if(qy + py > Y) py = Y - qy;
2008 qx = (s->mb_x << 6);
2009 qy = (s->mb_y << 6);
2010 X = (s->mb_width << 6) - 4;
2011 Y = (s->mb_height << 6) - 4;
2012 if(qx + px < -60) px = -60 - qx;
2013 if(qy + py < -60) py = -60 - qy;
2014 if(qx + px > X) px = X - qx;
2015 if(qy + py > Y) py = Y - qy;
2018 /* Calculate hybrid prediction as specified in 8.3.5.3.5 */
2019 if(0 && !s->first_slice_line && s->mb_x) {
2020 if(is_intra[xy - wrap])
2021 sum = FFABS(px) + FFABS(py);
2023 sum = FFABS(px - A[0]) + FFABS(py - A[1]);
2025 if(get_bits1(&s->gb)) {
2033 if(is_intra[xy - 2])
2034 sum = FFABS(px) + FFABS(py);
2036 sum = FFABS(px - C[0]) + FFABS(py - C[1]);
2038 if(get_bits1(&s->gb)) {
2048 /* store MV using signed modulus of MV range defined in 4.11 */
2049 s->mv[0][0][0] = ((px + dmv_x[0] + r_x) & ((r_x << 1) - 1)) - r_x;
2050 s->mv[0][0][1] = ((py + dmv_y[0] + r_y) & ((r_y << 1) - 1)) - r_y;
2052 if((mvtype == BMV_TYPE_BACKWARD) || (mvtype == BMV_TYPE_INTERPOLATED)) {
2053 C = s->current_picture.motion_val[1][xy - 2];
2054 A = s->current_picture.motion_val[1][xy - wrap*2];
2055 off = (s->mb_x == (s->mb_width - 1)) ? -2 : 2;
2056 B = s->current_picture.motion_val[1][xy - wrap*2 + off];
2058 if(!s->mb_x) C[0] = C[1] = 0;
2059 if(!s->first_slice_line) { // predictor A is not out of bounds
2060 if(s->mb_width == 1) {
2064 px = mid_pred(A[0], B[0], C[0]);
2065 py = mid_pred(A[1], B[1], C[1]);
2067 } else if(s->mb_x) { // predictor C is not out of bounds
2073 /* Pullback MV as specified in 8.3.5.3.4 */
2076 if(v->profile < PROFILE_ADVANCED) {
2077 qx = (s->mb_x << 5);
2078 qy = (s->mb_y << 5);
2079 X = (s->mb_width << 5) - 4;
2080 Y = (s->mb_height << 5) - 4;
2081 if(qx + px < -28) px = -28 - qx;
2082 if(qy + py < -28) py = -28 - qy;
2083 if(qx + px > X) px = X - qx;
2084 if(qy + py > Y) py = Y - qy;
2086 qx = (s->mb_x << 6);
2087 qy = (s->mb_y << 6);
2088 X = (s->mb_width << 6) - 4;
2089 Y = (s->mb_height << 6) - 4;
2090 if(qx + px < -60) px = -60 - qx;
2091 if(qy + py < -60) py = -60 - qy;
2092 if(qx + px > X) px = X - qx;
2093 if(qy + py > Y) py = Y - qy;
2096 /* Calculate hybrid prediction as specified in 8.3.5.3.5 */
2097 if(0 && !s->first_slice_line && s->mb_x) {
2098 if(is_intra[xy - wrap])
2099 sum = FFABS(px) + FFABS(py);
2101 sum = FFABS(px - A[0]) + FFABS(py - A[1]);
2103 if(get_bits1(&s->gb)) {
2111 if(is_intra[xy - 2])
2112 sum = FFABS(px) + FFABS(py);
2114 sum = FFABS(px - C[0]) + FFABS(py - C[1]);
2116 if(get_bits1(&s->gb)) {
2126 /* store MV using signed modulus of MV range defined in 4.11 */
2128 s->mv[1][0][0] = ((px + dmv_x[1] + r_x) & ((r_x << 1) - 1)) - r_x;
2129 s->mv[1][0][1] = ((py + dmv_y[1] + r_y) & ((r_y << 1) - 1)) - r_y;
2131 s->current_picture.motion_val[0][xy][0] = s->mv[0][0][0];
2132 s->current_picture.motion_val[0][xy][1] = s->mv[0][0][1];
2133 s->current_picture.motion_val[1][xy][0] = s->mv[1][0][0];
2134 s->current_picture.motion_val[1][xy][1] = s->mv[1][0][1];
2137 /** Get predicted DC value for I-frames only
2138 * prediction dir: left=0, top=1
2139 * @param s MpegEncContext
2140 * @param[in] n block index in the current MB
2141 * @param dc_val_ptr Pointer to DC predictor
2142 * @param dir_ptr Prediction direction for use in AC prediction
2144 static inline int vc1_i_pred_dc(MpegEncContext *s, int overlap, int pq, int n,
2145 int16_t **dc_val_ptr, int *dir_ptr)
2147 int a, b, c, wrap, pred, scale;
2149 static const uint16_t dcpred[32] = {
2150 -1, 1024, 512, 341, 256, 205, 171, 146, 128,
2151 114, 102, 93, 85, 79, 73, 68, 64,
2152 60, 57, 54, 51, 49, 47, 45, 43,
2153 41, 39, 38, 37, 35, 34, 33
2156 /* find prediction - wmv3_dc_scale always used here in fact */
2157 if (n < 4) scale = s->y_dc_scale;
2158 else scale = s->c_dc_scale;
2160 wrap = s->block_wrap[n];
2161 dc_val= s->dc_val[0] + s->block_index[n];
2167 b = dc_val[ - 1 - wrap];
2168 a = dc_val[ - wrap];
2170 if (pq < 9 || !overlap)
2172 /* Set outer values */
2173 if (s->first_slice_line && (n!=2 && n!=3)) b=a=dcpred[scale];
2174 if (s->mb_x == 0 && (n!=1 && n!=3)) b=c=dcpred[scale];
2178 /* Set outer values */
2179 if (s->first_slice_line && (n!=2 && n!=3)) b=a=0;
2180 if (s->mb_x == 0 && (n!=1 && n!=3)) b=c=0;
2183 if (abs(a - b) <= abs(b - c)) {
2191 /* update predictor */
2192 *dc_val_ptr = &dc_val[0];
2197 /** Get predicted DC value
2198 * prediction dir: left=0, top=1
2199 * @param s MpegEncContext
2200 * @param[in] n block index in the current MB
2201 * @param dc_val_ptr Pointer to DC predictor
2202 * @param dir_ptr Prediction direction for use in AC prediction
2204 static inline int vc1_pred_dc(MpegEncContext *s, int overlap, int pq, int n,
2205 int a_avail, int c_avail,
2206 int16_t **dc_val_ptr, int *dir_ptr)
2208 int a, b, c, wrap, pred, scale;
2210 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
2213 /* find prediction - wmv3_dc_scale always used here in fact */
2214 if (n < 4) scale = s->y_dc_scale;
2215 else scale = s->c_dc_scale;
2217 wrap = s->block_wrap[n];
2218 dc_val= s->dc_val[0] + s->block_index[n];
2224 b = dc_val[ - 1 - wrap];
2225 a = dc_val[ - wrap];
2226 /* scale predictors if needed */
2227 q1 = s->current_picture.qscale_table[mb_pos];
2228 if(c_avail && (n!= 1 && n!=3)) {
2229 q2 = s->current_picture.qscale_table[mb_pos - 1];
2231 c = (c * s->y_dc_scale_table[q2] * ff_vc1_dqscale[s->y_dc_scale_table[q1] - 1] + 0x20000) >> 18;
2233 if(a_avail && (n!= 2 && n!=3)) {
2234 q2 = s->current_picture.qscale_table[mb_pos - s->mb_stride];
2236 a = (a * s->y_dc_scale_table[q2] * ff_vc1_dqscale[s->y_dc_scale_table[q1] - 1] + 0x20000) >> 18;
2238 if(a_avail && c_avail && (n!=3)) {
2241 if(n != 2) off -= s->mb_stride;
2242 q2 = s->current_picture.qscale_table[off];
2244 b = (b * s->y_dc_scale_table[q2] * ff_vc1_dqscale[s->y_dc_scale_table[q1] - 1] + 0x20000) >> 18;
2247 if(a_avail && c_avail) {
2248 if(abs(a - b) <= abs(b - c)) {
2255 } else if(a_avail) {
2258 } else if(c_avail) {
2266 /* update predictor */
2267 *dc_val_ptr = &dc_val[0];
2273 * @defgroup std_mb VC1 Macroblock-level functions in Simple/Main Profiles
2274 * @see 7.1.4, p91 and 8.1.1.7, p(1)04
2278 static inline int vc1_coded_block_pred(MpegEncContext * s, int n, uint8_t **coded_block_ptr)
2280 int xy, wrap, pred, a, b, c;
2282 xy = s->block_index[n];
2283 wrap = s->b8_stride;
2288 a = s->coded_block[xy - 1 ];
2289 b = s->coded_block[xy - 1 - wrap];
2290 c = s->coded_block[xy - wrap];
2299 *coded_block_ptr = &s->coded_block[xy];
2305 * Decode one AC coefficient
2306 * @param v The VC1 context
2307 * @param last Last coefficient
2308 * @param skip How much zero coefficients to skip
2309 * @param value Decoded AC coefficient value
2312 static void vc1_decode_ac_coeff(VC1Context *v, int *last, int *skip, int *value, int codingset)
2314 GetBitContext *gb = &v->s.gb;
2315 int index, escape, run = 0, level = 0, lst = 0;
2317 index = get_vlc2(gb, ff_vc1_ac_coeff_table[codingset].table, AC_VLC_BITS, 3);
2318 if (index != vc1_ac_sizes[codingset] - 1) {
2319 run = vc1_index_decode_table[codingset][index][0];
2320 level = vc1_index_decode_table[codingset][index][1];
2321 lst = index >= vc1_last_decode_table[codingset];
2325 escape = decode210(gb);
2327 index = get_vlc2(gb, ff_vc1_ac_coeff_table[codingset].table, AC_VLC_BITS, 3);
2328 run = vc1_index_decode_table[codingset][index][0];
2329 level = vc1_index_decode_table[codingset][index][1];
2330 lst = index >= vc1_last_decode_table[codingset];
2333 level += vc1_last_delta_level_table[codingset][run];
2335 level += vc1_delta_level_table[codingset][run];
2338 run += vc1_last_delta_run_table[codingset][level] + 1;
2340 run += vc1_delta_run_table[codingset][level] + 1;
2346 lst = get_bits(gb, 1);
2347 if(v->s.esc3_level_length == 0) {
2348 if(v->pq < 8 || v->dquantfrm) { // table 59
2349 v->s.esc3_level_length = get_bits(gb, 3);
2350 if(!v->s.esc3_level_length)
2351 v->s.esc3_level_length = get_bits(gb, 2) + 8;
2353 v->s.esc3_level_length = get_prefix(gb, 1, 6) + 2;
2355 v->s.esc3_run_length = 3 + get_bits(gb, 2);
2357 run = get_bits(gb, v->s.esc3_run_length);
2358 sign = get_bits(gb, 1);
2359 level = get_bits(gb, v->s.esc3_level_length);
2370 /** Decode intra block in intra frames - should be faster than decode_intra_block
2371 * @param v VC1Context
2372 * @param block block to decode
2373 * @param coded are AC coeffs present or not
2374 * @param codingset set of VLC to decode data
2376 static int vc1_decode_i_block(VC1Context *v, DCTELEM block[64], int n, int coded, int codingset)
2378 GetBitContext *gb = &v->s.gb;
2379 MpegEncContext *s = &v->s;
2380 int dc_pred_dir = 0; /* Direction of the DC prediction used */
2383 int16_t *ac_val, *ac_val2;
2386 /* Get DC differential */
2388 dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_luma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);
2390 dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_chroma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);
2393 av_log(s->avctx, AV_LOG_ERROR, "Illegal DC VLC\n");
2398 if (dcdiff == 119 /* ESC index value */)
2400 /* TODO: Optimize */
2401 if (v->pq == 1) dcdiff = get_bits(gb, 10);
2402 else if (v->pq == 2) dcdiff = get_bits(gb, 9);
2403 else dcdiff = get_bits(gb, 8);
2408 dcdiff = (dcdiff<<2) + get_bits(gb, 2) - 3;
2409 else if (v->pq == 2)
2410 dcdiff = (dcdiff<<1) + get_bits(gb, 1) - 1;
2412 if (get_bits(gb, 1))
2417 dcdiff += vc1_i_pred_dc(&v->s, v->overlap, v->pq, n, &dc_val, &dc_pred_dir);
2420 /* Store the quantized DC coeff, used for prediction */
2422 block[0] = dcdiff * s->y_dc_scale;
2424 block[0] = dcdiff * s->c_dc_scale;
2437 int last = 0, skip, value;
2438 const int8_t *zz_table;
2442 scale = v->pq * 2 + v->halfpq;
2446 zz_table = ff_vc1_horizontal_zz;
2448 zz_table = ff_vc1_vertical_zz;
2450 zz_table = ff_vc1_normal_zz;
2452 ac_val = s->ac_val[0][0] + s->block_index[n] * 16;
2454 if(dc_pred_dir) //left
2457 ac_val -= 16 * s->block_wrap[n];
2460 vc1_decode_ac_coeff(v, &last, &skip, &value, codingset);
2464 block[zz_table[i++]] = value;
2467 /* apply AC prediction if needed */
2469 if(dc_pred_dir) { //left
2470 for(k = 1; k < 8; k++)
2471 block[k << 3] += ac_val[k];
2473 for(k = 1; k < 8; k++)
2474 block[k] += ac_val[k + 8];
2477 /* save AC coeffs for further prediction */
2478 for(k = 1; k < 8; k++) {
2479 ac_val2[k] = block[k << 3];
2480 ac_val2[k + 8] = block[k];
2483 /* scale AC coeffs */
2484 for(k = 1; k < 64; k++)
2488 block[k] += (block[k] < 0) ? -v->pq : v->pq;
2491 if(s->ac_pred) i = 63;
2497 ac_val = s->ac_val[0][0] + s->block_index[n] * 16;
2500 scale = v->pq * 2 + v->halfpq;
2501 memset(ac_val2, 0, 16 * 2);
2502 if(dc_pred_dir) {//left
2505 memcpy(ac_val2, ac_val, 8 * 2);
2507 ac_val -= 16 * s->block_wrap[n];
2509 memcpy(ac_val2 + 8, ac_val + 8, 8 * 2);
2512 /* apply AC prediction if needed */
2514 if(dc_pred_dir) { //left
2515 for(k = 1; k < 8; k++) {
2516 block[k << 3] = ac_val[k] * scale;
2517 if(!v->pquantizer && block[k << 3])
2518 block[k << 3] += (block[k << 3] < 0) ? -v->pq : v->pq;
2521 for(k = 1; k < 8; k++) {
2522 block[k] = ac_val[k + 8] * scale;
2523 if(!v->pquantizer && block[k])
2524 block[k] += (block[k] < 0) ? -v->pq : v->pq;
2530 s->block_last_index[n] = i;
2535 /** Decode intra block in intra frames - should be faster than decode_intra_block
2536 * @param v VC1Context
2537 * @param block block to decode
2538 * @param coded are AC coeffs present or not
2539 * @param codingset set of VLC to decode data
2541 static int vc1_decode_i_block_adv(VC1Context *v, DCTELEM block[64], int n, int coded, int codingset, int mquant)
2543 GetBitContext *gb = &v->s.gb;
2544 MpegEncContext *s = &v->s;
2545 int dc_pred_dir = 0; /* Direction of the DC prediction used */
2548 int16_t *ac_val, *ac_val2;
2550 int a_avail = v->a_avail, c_avail = v->c_avail;
2551 int use_pred = s->ac_pred;
2554 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
2556 /* Get DC differential */
2558 dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_luma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);
2560 dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_chroma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);
2563 av_log(s->avctx, AV_LOG_ERROR, "Illegal DC VLC\n");
2568 if (dcdiff == 119 /* ESC index value */)
2570 /* TODO: Optimize */
2571 if (mquant == 1) dcdiff = get_bits(gb, 10);
2572 else if (mquant == 2) dcdiff = get_bits(gb, 9);
2573 else dcdiff = get_bits(gb, 8);
2578 dcdiff = (dcdiff<<2) + get_bits(gb, 2) - 3;
2579 else if (mquant == 2)
2580 dcdiff = (dcdiff<<1) + get_bits(gb, 1) - 1;
2582 if (get_bits(gb, 1))
2587 dcdiff += vc1_pred_dc(&v->s, v->overlap, mquant, n, v->a_avail, v->c_avail, &dc_val, &dc_pred_dir);
2590 /* Store the quantized DC coeff, used for prediction */
2592 block[0] = dcdiff * s->y_dc_scale;
2594 block[0] = dcdiff * s->c_dc_scale;
2603 /* check if AC is needed at all */
2604 if(!a_avail && !c_avail) use_pred = 0;
2605 ac_val = s->ac_val[0][0] + s->block_index[n] * 16;
2608 scale = mquant * 2 + v->halfpq;
2610 if(dc_pred_dir) //left
2613 ac_val -= 16 * s->block_wrap[n];
2615 q1 = s->current_picture.qscale_table[mb_pos];
2616 if(dc_pred_dir && c_avail && mb_pos) q2 = s->current_picture.qscale_table[mb_pos - 1];
2617 if(!dc_pred_dir && a_avail && mb_pos >= s->mb_stride) q2 = s->current_picture.qscale_table[mb_pos - s->mb_stride];
2618 if(dc_pred_dir && n==1) q2 = q1;
2619 if(!dc_pred_dir && n==2) q2 = q1;
2623 int last = 0, skip, value;
2624 const int8_t *zz_table;
2629 zz_table = ff_vc1_horizontal_zz;
2631 zz_table = ff_vc1_vertical_zz;
2633 zz_table = ff_vc1_normal_zz;
2636 vc1_decode_ac_coeff(v, &last, &skip, &value, codingset);
2640 block[zz_table[i++]] = value;
2643 /* apply AC prediction if needed */
2645 /* scale predictors if needed*/
2647 q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;
2648 q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;
2650 if(dc_pred_dir) { //left
2651 for(k = 1; k < 8; k++)
2652 block[k << 3] += (ac_val[k] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;
2654 for(k = 1; k < 8; k++)
2655 block[k] += (ac_val[k + 8] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;
2658 if(dc_pred_dir) { //left
2659 for(k = 1; k < 8; k++)
2660 block[k << 3] += ac_val[k];
2662 for(k = 1; k < 8; k++)
2663 block[k] += ac_val[k + 8];
2667 /* save AC coeffs for further prediction */
2668 for(k = 1; k < 8; k++) {
2669 ac_val2[k] = block[k << 3];
2670 ac_val2[k + 8] = block[k];
2673 /* scale AC coeffs */
2674 for(k = 1; k < 64; k++)
2678 block[k] += (block[k] < 0) ? -mquant : mquant;
2681 if(use_pred) i = 63;
2682 } else { // no AC coeffs
2685 memset(ac_val2, 0, 16 * 2);
2686 if(dc_pred_dir) {//left
2688 memcpy(ac_val2, ac_val, 8 * 2);
2690 q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;
2691 q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;
2692 for(k = 1; k < 8; k++)
2693 ac_val2[k] = (ac_val2[k] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;
2698 memcpy(ac_val2 + 8, ac_val + 8, 8 * 2);
2700 q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;
2701 q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;
2702 for(k = 1; k < 8; k++)
2703 ac_val2[k + 8] = (ac_val2[k + 8] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;
2708 /* apply AC prediction if needed */
2710 if(dc_pred_dir) { //left
2711 for(k = 1; k < 8; k++) {
2712 block[k << 3] = ac_val2[k] * scale;
2713 if(!v->pquantizer && block[k << 3])
2714 block[k << 3] += (block[k << 3] < 0) ? -mquant : mquant;
2717 for(k = 1; k < 8; k++) {
2718 block[k] = ac_val2[k + 8] * scale;
2719 if(!v->pquantizer && block[k])
2720 block[k] += (block[k] < 0) ? -mquant : mquant;
2726 s->block_last_index[n] = i;
2731 /** Decode intra block in inter frames - more generic version than vc1_decode_i_block
2732 * @param v VC1Context
2733 * @param block block to decode
2734 * @param coded are AC coeffs present or not
2735 * @param mquant block quantizer
2736 * @param codingset set of VLC to decode data
2738 static int vc1_decode_intra_block(VC1Context *v, DCTELEM block[64], int n, int coded, int mquant, int codingset)
2740 GetBitContext *gb = &v->s.gb;
2741 MpegEncContext *s = &v->s;
2742 int dc_pred_dir = 0; /* Direction of the DC prediction used */
2745 int16_t *ac_val, *ac_val2;
2747 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
2748 int a_avail = v->a_avail, c_avail = v->c_avail;
2749 int use_pred = s->ac_pred;
2753 /* XXX: Guard against dumb values of mquant */
2754 mquant = (mquant < 1) ? 0 : ( (mquant>31) ? 31 : mquant );
2756 /* Set DC scale - y and c use the same */
2757 s->y_dc_scale = s->y_dc_scale_table[mquant];
2758 s->c_dc_scale = s->c_dc_scale_table[mquant];
2760 /* Get DC differential */
2762 dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_luma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);
2764 dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_chroma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);
2767 av_log(s->avctx, AV_LOG_ERROR, "Illegal DC VLC\n");
2772 if (dcdiff == 119 /* ESC index value */)
2774 /* TODO: Optimize */
2775 if (mquant == 1) dcdiff = get_bits(gb, 10);
2776 else if (mquant == 2) dcdiff = get_bits(gb, 9);
2777 else dcdiff = get_bits(gb, 8);
2782 dcdiff = (dcdiff<<2) + get_bits(gb, 2) - 3;
2783 else if (mquant == 2)
2784 dcdiff = (dcdiff<<1) + get_bits(gb, 1) - 1;
2786 if (get_bits(gb, 1))
2791 dcdiff += vc1_pred_dc(&v->s, v->overlap, mquant, n, a_avail, c_avail, &dc_val, &dc_pred_dir);
2794 /* Store the quantized DC coeff, used for prediction */
2797 block[0] = dcdiff * s->y_dc_scale;
2799 block[0] = dcdiff * s->c_dc_scale;
2808 /* check if AC is needed at all and adjust direction if needed */
2809 if(!a_avail) dc_pred_dir = 1;
2810 if(!c_avail) dc_pred_dir = 0;
2811 if(!a_avail && !c_avail) use_pred = 0;
2812 ac_val = s->ac_val[0][0] + s->block_index[n] * 16;
2815 scale = mquant * 2 + v->halfpq;
2817 if(dc_pred_dir) //left
2820 ac_val -= 16 * s->block_wrap[n];
2822 q1 = s->current_picture.qscale_table[mb_pos];
2823 if(dc_pred_dir && c_avail && mb_pos) q2 = s->current_picture.qscale_table[mb_pos - 1];
2824 if(!dc_pred_dir && a_avail && mb_pos >= s->mb_stride) q2 = s->current_picture.qscale_table[mb_pos - s->mb_stride];
2825 if(dc_pred_dir && n==1) q2 = q1;
2826 if(!dc_pred_dir && n==2) q2 = q1;
2830 int last = 0, skip, value;
2831 const int8_t *zz_table;
2834 zz_table = ff_vc1_simple_progressive_8x8_zz;
2837 vc1_decode_ac_coeff(v, &last, &skip, &value, codingset);
2841 block[zz_table[i++]] = value;
2844 /* apply AC prediction if needed */
2846 /* scale predictors if needed*/
2848 q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;
2849 q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;
2851 if(dc_pred_dir) { //left
2852 for(k = 1; k < 8; k++)
2853 block[k << 3] += (ac_val[k] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;
2855 for(k = 1; k < 8; k++)
2856 block[k] += (ac_val[k + 8] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;
2859 if(dc_pred_dir) { //left
2860 for(k = 1; k < 8; k++)
2861 block[k << 3] += ac_val[k];
2863 for(k = 1; k < 8; k++)
2864 block[k] += ac_val[k + 8];
2868 /* save AC coeffs for further prediction */
2869 for(k = 1; k < 8; k++) {
2870 ac_val2[k] = block[k << 3];
2871 ac_val2[k + 8] = block[k];
2874 /* scale AC coeffs */
2875 for(k = 1; k < 64; k++)
2879 block[k] += (block[k] < 0) ? -mquant : mquant;
2882 if(use_pred) i = 63;
2883 } else { // no AC coeffs
2886 memset(ac_val2, 0, 16 * 2);
2887 if(dc_pred_dir) {//left
2889 memcpy(ac_val2, ac_val, 8 * 2);
2891 q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;
2892 q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;
2893 for(k = 1; k < 8; k++)
2894 ac_val2[k] = (ac_val2[k] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;
2899 memcpy(ac_val2 + 8, ac_val + 8, 8 * 2);
2901 q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;
2902 q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;
2903 for(k = 1; k < 8; k++)
2904 ac_val2[k + 8] = (ac_val2[k + 8] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;
2909 /* apply AC prediction if needed */
2911 if(dc_pred_dir) { //left
2912 for(k = 1; k < 8; k++) {
2913 block[k << 3] = ac_val2[k] * scale;
2914 if(!v->pquantizer && block[k << 3])
2915 block[k << 3] += (block[k << 3] < 0) ? -mquant : mquant;
2918 for(k = 1; k < 8; k++) {
2919 block[k] = ac_val2[k + 8] * scale;
2920 if(!v->pquantizer && block[k])
2921 block[k] += (block[k] < 0) ? -mquant : mquant;
2927 s->block_last_index[n] = i;
2934 static int vc1_decode_p_block(VC1Context *v, DCTELEM block[64], int n, int mquant, int ttmb, int first_block)
2936 MpegEncContext *s = &v->s;
2937 GetBitContext *gb = &s->gb;
2940 int scale, off, idx, last, skip, value;
2941 int ttblk = ttmb & 7;
2944 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)];
2946 if(ttblk == TT_4X4) {
2947 subblkpat = ~(get_vlc2(gb, ff_vc1_subblkpat_vlc[v->tt_index].table, VC1_SUBBLKPAT_VLC_BITS, 1) + 1);
2949 if((ttblk != TT_8X8 && ttblk != TT_4X4) && (v->ttmbf || (ttmb != -1 && (ttmb & 8) && !first_block))) {
2950 subblkpat = decode012(gb);
2951 if(subblkpat) subblkpat ^= 3; //swap decoded pattern bits
2952 if(ttblk == TT_8X4_TOP || ttblk == TT_8X4_BOTTOM) ttblk = TT_8X4;
2953 if(ttblk == TT_4X8_RIGHT || ttblk == TT_4X8_LEFT) ttblk = TT_4X8;
2955 scale = 2 * mquant + ((v->pq == mquant) ? v->halfpq : 0);
2957 // convert transforms like 8X4_TOP to generic TT and SUBBLKPAT
2958 if(ttblk == TT_8X4_TOP || ttblk == TT_8X4_BOTTOM) {
2959 subblkpat = 2 - (ttblk == TT_8X4_TOP);
2962 if(ttblk == TT_4X8_RIGHT || ttblk == TT_4X8_LEFT) {
2963 subblkpat = 2 - (ttblk == TT_4X8_LEFT);
2971 vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);
2975 idx = ff_vc1_simple_progressive_8x8_zz[i++];
2976 block[idx] = value * scale;
2978 block[idx] += (block[idx] < 0) ? -mquant : mquant;
2980 s->dsp.vc1_inv_trans_8x8(block);
2983 for(j = 0; j < 4; j++) {
2984 last = subblkpat & (1 << (3 - j));
2986 off = (j & 1) * 4 + (j & 2) * 16;
2988 vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);
2992 idx = ff_vc1_simple_progressive_4x4_zz[i++];
2993 block[idx + off] = value * scale;
2995 block[idx + off] += (block[idx + off] < 0) ? -mquant : mquant;
2997 if(!(subblkpat & (1 << (3 - j))))
2998 s->dsp.vc1_inv_trans_4x4(block, j);
3002 for(j = 0; j < 2; j++) {
3003 last = subblkpat & (1 << (1 - j));
3007 vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);
3011 if(v->profile < PROFILE_ADVANCED)
3012 idx = ff_vc1_simple_progressive_8x4_zz[i++];
3014 idx = ff_vc1_adv_progressive_8x4_zz[i++];
3015 block[idx + off] = value * scale;
3017 block[idx + off] += (block[idx + off] < 0) ? -mquant : mquant;
3019 if(!(subblkpat & (1 << (1 - j))))
3020 s->dsp.vc1_inv_trans_8x4(block, j);
3024 for(j = 0; j < 2; j++) {
3025 last = subblkpat & (1 << (1 - j));
3029 vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);
3033 if(v->profile < PROFILE_ADVANCED)
3034 idx = ff_vc1_simple_progressive_4x8_zz[i++];
3036 idx = ff_vc1_adv_progressive_4x8_zz[i++];
3037 block[idx + off] = value * scale;
3039 block[idx + off] += (block[idx + off] < 0) ? -mquant : mquant;
3041 if(!(subblkpat & (1 << (1 - j))))
3042 s->dsp.vc1_inv_trans_4x8(block, j);
3050 /** Decode one P-frame MB (in Simple/Main profile)
3052 static int vc1_decode_p_mb(VC1Context *v)
3054 MpegEncContext *s = &v->s;
3055 GetBitContext *gb = &s->gb;
3057 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
3058 int cbp; /* cbp decoding stuff */
3059 int mqdiff, mquant; /* MB quantization */
3060 int ttmb = v->ttfrm; /* MB Transform type */
3063 static const int size_table[6] = { 0, 2, 3, 4, 5, 8 },
3064 offset_table[6] = { 0, 1, 3, 7, 15, 31 };
3065 int mb_has_coeffs = 1; /* last_flag */
3066 int dmv_x, dmv_y; /* Differential MV components */
3067 int index, index1; /* LUT indices */
3068 int val, sign; /* temp values */
3069 int first_block = 1;
3071 int skipped, fourmv;
3073 mquant = v->pq; /* Loosy initialization */
3075 if (v->mv_type_is_raw)
3076 fourmv = get_bits1(gb);
3078 fourmv = v->mv_type_mb_plane[mb_pos];
3080 skipped = get_bits1(gb);
3082 skipped = v->s.mbskip_table[mb_pos];
3084 s->dsp.clear_blocks(s->block[0]);
3086 if (!fourmv) /* 1MV mode */
3090 GET_MVDATA(dmv_x, dmv_y);
3093 s->current_picture.motion_val[1][s->block_index[0]][0] = 0;
3094 s->current_picture.motion_val[1][s->block_index[0]][1] = 0;
3096 s->current_picture.mb_type[mb_pos] = s->mb_intra ? MB_TYPE_INTRA : MB_TYPE_16x16;
3097 vc1_pred_mv(s, 0, dmv_x, dmv_y, 1, v->range_x, v->range_y, v->mb_type[0]);
3099 /* FIXME Set DC val for inter block ? */
3100 if (s->mb_intra && !mb_has_coeffs)
3103 s->ac_pred = get_bits(gb, 1);
3106 else if (mb_has_coeffs)
3108 if (s->mb_intra) s->ac_pred = get_bits(gb, 1);
3109 cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
3117 s->current_picture.qscale_table[mb_pos] = mquant;
3119 if (!v->ttmbf && !s->mb_intra && mb_has_coeffs)
3120 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table,
3121 VC1_TTMB_VLC_BITS, 2);
3122 if(!s->mb_intra) vc1_mc_1mv(v, 0);
3126 s->dc_val[0][s->block_index[i]] = 0;
3128 val = ((cbp >> (5 - i)) & 1);
3129 off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);
3130 v->mb_type[0][s->block_index[i]] = s->mb_intra;
3132 /* check if prediction blocks A and C are available */
3133 v->a_avail = v->c_avail = 0;
3134 if(i == 2 || i == 3 || !s->first_slice_line)
3135 v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];
3136 if(i == 1 || i == 3 || s->mb_x)
3137 v->c_avail = v->mb_type[0][s->block_index[i] - 1];
3139 vc1_decode_intra_block(v, s->block[i], i, val, mquant, (i&4)?v->codingset2:v->codingset);
3140 if((i>3) && (s->flags & CODEC_FLAG_GRAY)) continue;
3141 s->dsp.vc1_inv_trans_8x8(s->block[i]);
3142 if(v->rangeredfrm) for(j = 0; j < 64; j++) s->block[i][j] <<= 1;
3143 for(j = 0; j < 64; j++) s->block[i][j] += 128;
3144 if(!v->res_fasttx && v->res_x8) for(j = 0; j < 64; j++) s->block[i][j] += 16;
3145 s->dsp.put_pixels_clamped(s->block[i], s->dest[dst_idx] + off, s->linesize >> ((i & 4) >> 2));
3146 if(v->pq >= 9 && v->overlap) {
3148 s->dsp.vc1_h_overlap(s->dest[dst_idx] + off, s->linesize >> ((i & 4) >> 2));
3150 s->dsp.vc1_v_overlap(s->dest[dst_idx] + off, s->linesize >> ((i & 4) >> 2));
3153 vc1_decode_p_block(v, s->block[i], i, mquant, ttmb, first_block);
3154 if(!v->ttmbf && ttmb < 8) ttmb = -1;
3156 if((i<4) || !(s->flags & CODEC_FLAG_GRAY))
3157 s->dsp.add_pixels_clamped(s->block[i], s->dest[dst_idx] + off, (i&4)?s->uvlinesize:s->linesize);
3164 for(i = 0; i < 6; i++) {
3165 v->mb_type[0][s->block_index[i]] = 0;
3166 s->dc_val[0][s->block_index[i]] = 0;
3168 s->current_picture.mb_type[mb_pos] = MB_TYPE_SKIP;
3169 s->current_picture.qscale_table[mb_pos] = 0;
3170 vc1_pred_mv(s, 0, 0, 0, 1, v->range_x, v->range_y, v->mb_type[0]);
3177 if (!skipped /* unskipped MB */)
3179 int intra_count = 0, coded_inter = 0;
3180 int is_intra[6], is_coded[6];
3182 cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
3185 val = ((cbp >> (5 - i)) & 1);
3186 s->dc_val[0][s->block_index[i]] = 0;
3193 GET_MVDATA(dmv_x, dmv_y);
3195 vc1_pred_mv(s, i, dmv_x, dmv_y, 0, v->range_x, v->range_y, v->mb_type[0]);
3196 if(!s->mb_intra) vc1_mc_4mv_luma(v, i);
3197 intra_count += s->mb_intra;
3198 is_intra[i] = s->mb_intra;
3199 is_coded[i] = mb_has_coeffs;
3202 is_intra[i] = (intra_count >= 3);
3205 if(i == 4) vc1_mc_4mv_chroma(v);
3206 v->mb_type[0][s->block_index[i]] = is_intra[i];
3207 if(!coded_inter) coded_inter = !is_intra[i] & is_coded[i];
3209 // if there are no coded blocks then don't do anything more
3210 if(!intra_count && !coded_inter) return 0;
3213 s->current_picture.qscale_table[mb_pos] = mquant;
3214 /* test if block is intra and has pred */
3219 if(((!s->first_slice_line || (i==2 || i==3)) && v->mb_type[0][s->block_index[i] - s->block_wrap[i]])
3220 || ((s->mb_x || (i==1 || i==3)) && v->mb_type[0][s->block_index[i] - 1])) {
3225 if(intrapred)s->ac_pred = get_bits(gb, 1);
3226 else s->ac_pred = 0;
3228 if (!v->ttmbf && coded_inter)
3229 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);
3233 off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);
3234 s->mb_intra = is_intra[i];
3236 /* check if prediction blocks A and C are available */
3237 v->a_avail = v->c_avail = 0;
3238 if(i == 2 || i == 3 || !s->first_slice_line)
3239 v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];
3240 if(i == 1 || i == 3 || s->mb_x)
3241 v->c_avail = v->mb_type[0][s->block_index[i] - 1];
3243 vc1_decode_intra_block(v, s->block[i], i, is_coded[i], mquant, (i&4)?v->codingset2:v->codingset);
3244 if((i>3) && (s->flags & CODEC_FLAG_GRAY)) continue;
3245 s->dsp.vc1_inv_trans_8x8(s->block[i]);
3246 if(v->rangeredfrm) for(j = 0; j < 64; j++) s->block[i][j] <<= 1;
3247 for(j = 0; j < 64; j++) s->block[i][j] += 128;
3248 if(!v->res_fasttx && v->res_x8) for(j = 0; j < 64; j++) s->block[i][j] += 16;
3249 s->dsp.put_pixels_clamped(s->block[i], s->dest[dst_idx] + off, (i&4)?s->uvlinesize:s->linesize);
3250 if(v->pq >= 9 && v->overlap) {
3252 s->dsp.vc1_h_overlap(s->dest[dst_idx] + off, s->linesize >> ((i & 4) >> 2));
3254 s->dsp.vc1_v_overlap(s->dest[dst_idx] + off, s->linesize >> ((i & 4) >> 2));
3256 } else if(is_coded[i]) {
3257 status = vc1_decode_p_block(v, s->block[i], i, mquant, ttmb, first_block);
3258 if(!v->ttmbf && ttmb < 8) ttmb = -1;
3260 if((i<4) || !(s->flags & CODEC_FLAG_GRAY))
3261 s->dsp.add_pixels_clamped(s->block[i], s->dest[dst_idx] + off, (i&4)?s->uvlinesize:s->linesize);
3269 s->current_picture.qscale_table[mb_pos] = 0;
3270 for (i=0; i<6; i++) {
3271 v->mb_type[0][s->block_index[i]] = 0;
3272 s->dc_val[0][s->block_index[i]] = 0;
3276 vc1_pred_mv(s, i, 0, 0, 0, v->range_x, v->range_y, v->mb_type[0]);
3277 vc1_mc_4mv_luma(v, i);
3279 vc1_mc_4mv_chroma(v);
3280 s->current_picture.qscale_table[mb_pos] = 0;
3285 /* Should never happen */
3289 /** Decode one B-frame MB (in Main profile)
3291 static void vc1_decode_b_mb(VC1Context *v)
3293 MpegEncContext *s = &v->s;
3294 GetBitContext *gb = &s->gb;
3296 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
3297 int cbp = 0; /* cbp decoding stuff */
3298 int mqdiff, mquant; /* MB quantization */
3299 int ttmb = v->ttfrm; /* MB Transform type */
3301 static const int size_table[6] = { 0, 2, 3, 4, 5, 8 },
3302 offset_table[6] = { 0, 1, 3, 7, 15, 31 };
3303 int mb_has_coeffs = 0; /* last_flag */
3304 int index, index1; /* LUT indices */
3305 int val, sign; /* temp values */
3306 int first_block = 1;
3308 int skipped, direct;
3309 int dmv_x[2], dmv_y[2];
3310 int bmvtype = BMV_TYPE_BACKWARD;
3312 mquant = v->pq; /* Loosy initialization */
3316 direct = get_bits1(gb);
3318 direct = v->direct_mb_plane[mb_pos];
3320 skipped = get_bits1(gb);
3322 skipped = v->s.mbskip_table[mb_pos];
3324 s->dsp.clear_blocks(s->block[0]);
3325 dmv_x[0] = dmv_x[1] = dmv_y[0] = dmv_y[1] = 0;
3326 for(i = 0; i < 6; i++) {
3327 v->mb_type[0][s->block_index[i]] = 0;
3328 s->dc_val[0][s->block_index[i]] = 0;
3330 s->current_picture.qscale_table[mb_pos] = 0;
3334 GET_MVDATA(dmv_x[0], dmv_y[0]);
3335 dmv_x[1] = dmv_x[0];
3336 dmv_y[1] = dmv_y[0];
3338 if(skipped || !s->mb_intra) {
3339 bmvtype = decode012(gb);
3342 bmvtype = (v->bfraction >= (B_FRACTION_DEN/2)) ? BMV_TYPE_BACKWARD : BMV_TYPE_FORWARD;
3345 bmvtype = (v->bfraction >= (B_FRACTION_DEN/2)) ? BMV_TYPE_FORWARD : BMV_TYPE_BACKWARD;
3348 bmvtype = BMV_TYPE_INTERPOLATED;
3349 dmv_x[0] = dmv_y[0] = 0;
3353 for(i = 0; i < 6; i++)
3354 v->mb_type[0][s->block_index[i]] = s->mb_intra;
3357 if(direct) bmvtype = BMV_TYPE_INTERPOLATED;
3358 vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);
3359 vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);
3363 cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
3367 s->current_picture.qscale_table[mb_pos] = mquant;
3369 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);
3370 dmv_x[0] = dmv_y[0] = dmv_x[1] = dmv_y[1] = 0;
3371 vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);
3372 vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);
3374 if(!mb_has_coeffs && !s->mb_intra) {
3375 /* no coded blocks - effectively skipped */
3376 vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);
3377 vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);
3380 if(s->mb_intra && !mb_has_coeffs) {
3382 s->current_picture.qscale_table[mb_pos] = mquant;
3383 s->ac_pred = get_bits1(gb);
3385 vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);
3387 if(bmvtype == BMV_TYPE_INTERPOLATED) {
3388 GET_MVDATA(dmv_x[0], dmv_y[0]);
3389 if(!mb_has_coeffs) {
3390 /* interpolated skipped block */
3391 vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);
3392 vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);
3396 vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);
3398 vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);
3401 s->ac_pred = get_bits1(gb);
3402 cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
3404 s->current_picture.qscale_table[mb_pos] = mquant;
3405 if(!v->ttmbf && !s->mb_intra && mb_has_coeffs)
3406 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);
3412 s->dc_val[0][s->block_index[i]] = 0;
3414 val = ((cbp >> (5 - i)) & 1);
3415 off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);
3416 v->mb_type[0][s->block_index[i]] = s->mb_intra;
3418 /* check if prediction blocks A and C are available */
3419 v->a_avail = v->c_avail = 0;
3420 if(i == 2 || i == 3 || !s->first_slice_line)
3421 v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];
3422 if(i == 1 || i == 3 || s->mb_x)
3423 v->c_avail = v->mb_type[0][s->block_index[i] - 1];
3425 vc1_decode_intra_block(v, s->block[i], i, val, mquant, (i&4)?v->codingset2:v->codingset);
3426 if((i>3) && (s->flags & CODEC_FLAG_GRAY)) continue;
3427 s->dsp.vc1_inv_trans_8x8(s->block[i]);
3428 if(v->rangeredfrm) for(j = 0; j < 64; j++) s->block[i][j] <<= 1;
3429 for(j = 0; j < 64; j++) s->block[i][j] += 128;
3430 s->dsp.put_pixels_clamped(s->block[i], s->dest[dst_idx] + off, s->linesize >> ((i & 4) >> 2));
3432 vc1_decode_p_block(v, s->block[i], i, mquant, ttmb, first_block);
3433 if(!v->ttmbf && ttmb < 8) ttmb = -1;
3435 if((i<4) || !(s->flags & CODEC_FLAG_GRAY))
3436 s->dsp.add_pixels_clamped(s->block[i], s->dest[dst_idx] + off, (i&4)?s->uvlinesize:s->linesize);
3441 /** Decode blocks of I-frame
3443 static void vc1_decode_i_blocks(VC1Context *v)
3446 MpegEncContext *s = &v->s;
3451 /* select codingmode used for VLC tables selection */
3452 switch(v->y_ac_table_index){
3454 v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;
3457 v->codingset = CS_HIGH_MOT_INTRA;
3460 v->codingset = CS_MID_RATE_INTRA;
3464 switch(v->c_ac_table_index){
3466 v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;
3469 v->codingset2 = CS_HIGH_MOT_INTER;
3472 v->codingset2 = CS_MID_RATE_INTER;
3476 /* Set DC scale - y and c use the same */
3477 s->y_dc_scale = s->y_dc_scale_table[v->pq];
3478 s->c_dc_scale = s->c_dc_scale_table[v->pq];
3481 s->mb_x = s->mb_y = 0;
3483 s->first_slice_line = 1;
3484 ff_er_add_slice(s, 0, 0, s->mb_width - 1, s->mb_height - 1, (AC_END|DC_END|MV_END));
3485 for(s->mb_y = 0; s->mb_y < s->mb_height; s->mb_y++) {
3486 for(s->mb_x = 0; s->mb_x < s->mb_width; s->mb_x++) {
3487 ff_init_block_index(s);
3488 ff_update_block_index(s);
3489 s->dsp.clear_blocks(s->block[0]);
3490 mb_pos = s->mb_x + s->mb_y * s->mb_width;
3491 s->current_picture.mb_type[mb_pos] = MB_TYPE_INTRA;
3492 s->current_picture.qscale_table[mb_pos] = v->pq;
3493 s->current_picture.motion_val[1][s->block_index[0]][0] = 0;
3494 s->current_picture.motion_val[1][s->block_index[0]][1] = 0;
3496 // do actual MB decoding and displaying
3497 cbp = get_vlc2(&v->s.gb, ff_msmp4_mb_i_vlc.table, MB_INTRA_VLC_BITS, 2);
3498 v->s.ac_pred = get_bits(&v->s.gb, 1);
3500 for(k = 0; k < 6; k++) {
3501 val = ((cbp >> (5 - k)) & 1);
3504 int pred = vc1_coded_block_pred(&v->s, k, &coded_val);
3508 cbp |= val << (5 - k);
3510 vc1_decode_i_block(v, s->block[k], k, val, (k<4)? v->codingset : v->codingset2);
3512 s->dsp.vc1_inv_trans_8x8(s->block[k]);
3513 if(!v->res_fasttx && !v->res_x8) for(j = 0; j < 64; j++) s->block[k][j] -= 16;
3514 if(v->pq >= 9 && v->overlap) {
3515 for(j = 0; j < 64; j++) s->block[k][j] += 128;
3519 vc1_put_block(v, s->block);
3520 if(v->pq >= 9 && v->overlap) {
3522 s->dsp.vc1_h_overlap(s->dest[0], s->linesize);
3523 s->dsp.vc1_h_overlap(s->dest[0] + 8 * s->linesize, s->linesize);
3524 if(!(s->flags & CODEC_FLAG_GRAY)) {
3525 s->dsp.vc1_h_overlap(s->dest[1], s->uvlinesize);
3526 s->dsp.vc1_h_overlap(s->dest[2], s->uvlinesize);
3529 s->dsp.vc1_h_overlap(s->dest[0] + 8, s->linesize);
3530 s->dsp.vc1_h_overlap(s->dest[0] + 8 * s->linesize + 8, s->linesize);
3531 if(!s->first_slice_line) {
3532 s->dsp.vc1_v_overlap(s->dest[0], s->linesize);
3533 s->dsp.vc1_v_overlap(s->dest[0] + 8, s->linesize);
3534 if(!(s->flags & CODEC_FLAG_GRAY)) {
3535 s->dsp.vc1_v_overlap(s->dest[1], s->uvlinesize);
3536 s->dsp.vc1_v_overlap(s->dest[2], s->uvlinesize);
3539 s->dsp.vc1_v_overlap(s->dest[0] + 8 * s->linesize, s->linesize);
3540 s->dsp.vc1_v_overlap(s->dest[0] + 8 * s->linesize + 8, s->linesize);
3543 if(get_bits_count(&s->gb) > v->bits) {
3544 av_log(s->avctx, AV_LOG_ERROR, "Bits overconsumption: %i > %i\n", get_bits_count(&s->gb), v->bits);
3548 ff_draw_horiz_band(s, s->mb_y * 16, 16);
3549 s->first_slice_line = 0;
3553 /** Decode blocks of I-frame for advanced profile
3555 static void vc1_decode_i_blocks_adv(VC1Context *v)
3558 MpegEncContext *s = &v->s;
3565 GetBitContext *gb = &s->gb;
3567 /* select codingmode used for VLC tables selection */
3568 switch(v->y_ac_table_index){
3570 v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;
3573 v->codingset = CS_HIGH_MOT_INTRA;
3576 v->codingset = CS_MID_RATE_INTRA;
3580 switch(v->c_ac_table_index){
3582 v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;
3585 v->codingset2 = CS_HIGH_MOT_INTER;
3588 v->codingset2 = CS_MID_RATE_INTER;
3593 s->mb_x = s->mb_y = 0;
3595 s->first_slice_line = 1;
3596 ff_er_add_slice(s, 0, 0, s->mb_width - 1, s->mb_height - 1, (AC_END|DC_END|MV_END));
3597 for(s->mb_y = 0; s->mb_y < s->mb_height; s->mb_y++) {
3598 for(s->mb_x = 0; s->mb_x < s->mb_width; s->mb_x++) {
3599 ff_init_block_index(s);
3600 ff_update_block_index(s);
3601 s->dsp.clear_blocks(s->block[0]);
3602 mb_pos = s->mb_x + s->mb_y * s->mb_stride;
3603 s->current_picture.mb_type[mb_pos] = MB_TYPE_INTRA;
3604 s->current_picture.motion_val[1][s->block_index[0]][0] = 0;
3605 s->current_picture.motion_val[1][s->block_index[0]][1] = 0;
3607 // do actual MB decoding and displaying
3608 cbp = get_vlc2(&v->s.gb, ff_msmp4_mb_i_vlc.table, MB_INTRA_VLC_BITS, 2);
3609 if(v->acpred_is_raw)
3610 v->s.ac_pred = get_bits(&v->s.gb, 1);
3612 v->s.ac_pred = v->acpred_plane[mb_pos];
3614 if(v->condover == CONDOVER_SELECT) {
3615 if(v->overflg_is_raw)
3616 overlap = get_bits(&v->s.gb, 1);
3618 overlap = v->over_flags_plane[mb_pos];
3620 overlap = (v->condover == CONDOVER_ALL);
3624 s->current_picture.qscale_table[mb_pos] = mquant;
3625 /* Set DC scale - y and c use the same */
3626 s->y_dc_scale = s->y_dc_scale_table[mquant];
3627 s->c_dc_scale = s->c_dc_scale_table[mquant];
3629 for(k = 0; k < 6; k++) {
3630 val = ((cbp >> (5 - k)) & 1);
3633 int pred = vc1_coded_block_pred(&v->s, k, &coded_val);
3637 cbp |= val << (5 - k);
3639 v->a_avail = !s->first_slice_line || (k==2 || k==3);
3640 v->c_avail = !!s->mb_x || (k==1 || k==3);
3642 vc1_decode_i_block_adv(v, s->block[k], k, val, (k<4)? v->codingset : v->codingset2, mquant);
3644 s->dsp.vc1_inv_trans_8x8(s->block[k]);
3645 for(j = 0; j < 64; j++) s->block[k][j] += 128;
3648 vc1_put_block(v, s->block);
3651 s->dsp.vc1_h_overlap(s->dest[0], s->linesize);
3652 s->dsp.vc1_h_overlap(s->dest[0] + 8 * s->linesize, s->linesize);
3653 if(!(s->flags & CODEC_FLAG_GRAY)) {
3654 s->dsp.vc1_h_overlap(s->dest[1], s->uvlinesize);
3655 s->dsp.vc1_h_overlap(s->dest[2], s->uvlinesize);
3658 s->dsp.vc1_h_overlap(s->dest[0] + 8, s->linesize);
3659 s->dsp.vc1_h_overlap(s->dest[0] + 8 * s->linesize + 8, s->linesize);
3660 if(!s->first_slice_line) {
3661 s->dsp.vc1_v_overlap(s->dest[0], s->linesize);
3662 s->dsp.vc1_v_overlap(s->dest[0] + 8, s->linesize);
3663 if(!(s->flags & CODEC_FLAG_GRAY)) {
3664 s->dsp.vc1_v_overlap(s->dest[1], s->uvlinesize);
3665 s->dsp.vc1_v_overlap(s->dest[2], s->uvlinesize);
3668 s->dsp.vc1_v_overlap(s->dest[0] + 8 * s->linesize, s->linesize);
3669 s->dsp.vc1_v_overlap(s->dest[0] + 8 * s->linesize + 8, s->linesize);
3672 if(get_bits_count(&s->gb) > v->bits) {
3673 av_log(s->avctx, AV_LOG_ERROR, "Bits overconsumption: %i > %i\n", get_bits_count(&s->gb), v->bits);
3677 ff_draw_horiz_band(s, s->mb_y * 16, 16);
3678 s->first_slice_line = 0;
3682 static void vc1_decode_p_blocks(VC1Context *v)
3684 MpegEncContext *s = &v->s;
3686 /* select codingmode used for VLC tables selection */
3687 switch(v->c_ac_table_index){
3689 v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;
3692 v->codingset = CS_HIGH_MOT_INTRA;
3695 v->codingset = CS_MID_RATE_INTRA;
3699 switch(v->c_ac_table_index){
3701 v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;
3704 v->codingset2 = CS_HIGH_MOT_INTER;
3707 v->codingset2 = CS_MID_RATE_INTER;
3711 ff_er_add_slice(s, 0, 0, s->mb_width - 1, s->mb_height - 1, (AC_END|DC_END|MV_END));
3712 s->first_slice_line = 1;
3713 for(s->mb_y = 0; s->mb_y < s->mb_height; s->mb_y++) {
3714 for(s->mb_x = 0; s->mb_x < s->mb_width; s->mb_x++) {
3715 ff_init_block_index(s);
3716 ff_update_block_index(s);
3717 s->dsp.clear_blocks(s->block[0]);
3720 if(get_bits_count(&s->gb) > v->bits || get_bits_count(&s->gb) < 0) {
3721 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);
3725 ff_draw_horiz_band(s, s->mb_y * 16, 16);
3726 s->first_slice_line = 0;
3730 static void vc1_decode_b_blocks(VC1Context *v)
3732 MpegEncContext *s = &v->s;
3734 /* select codingmode used for VLC tables selection */
3735 switch(v->c_ac_table_index){
3737 v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;
3740 v->codingset = CS_HIGH_MOT_INTRA;
3743 v->codingset = CS_MID_RATE_INTRA;
3747 switch(v->c_ac_table_index){
3749 v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;
3752 v->codingset2 = CS_HIGH_MOT_INTER;
3755 v->codingset2 = CS_MID_RATE_INTER;
3759 ff_er_add_slice(s, 0, 0, s->mb_width - 1, s->mb_height - 1, (AC_END|DC_END|MV_END));
3760 s->first_slice_line = 1;
3761 for(s->mb_y = 0; s->mb_y < s->mb_height; s->mb_y++) {
3762 for(s->mb_x = 0; s->mb_x < s->mb_width; s->mb_x++) {
3763 ff_init_block_index(s);
3764 ff_update_block_index(s);
3765 s->dsp.clear_blocks(s->block[0]);
3768 if(get_bits_count(&s->gb) > v->bits || get_bits_count(&s->gb) < 0) {
3769 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);
3773 ff_draw_horiz_band(s, s->mb_y * 16, 16);
3774 s->first_slice_line = 0;
3778 static void vc1_decode_skip_blocks(VC1Context *v)
3780 MpegEncContext *s = &v->s;
3782 ff_er_add_slice(s, 0, 0, s->mb_width - 1, s->mb_height - 1, (AC_END|DC_END|MV_END));
3783 s->first_slice_line = 1;
3784 for(s->mb_y = 0; s->mb_y < s->mb_height; s->mb_y++) {
3786 ff_init_block_index(s);
3787 ff_update_block_index(s);
3788 memcpy(s->dest[0], s->last_picture.data[0] + s->mb_y * 16 * s->linesize, s->linesize * 16);
3789 memcpy(s->dest[1], s->last_picture.data[1] + s->mb_y * 8 * s->uvlinesize, s->uvlinesize * 8);
3790 memcpy(s->dest[2], s->last_picture.data[2] + s->mb_y * 8 * s->uvlinesize, s->uvlinesize * 8);
3791 ff_draw_horiz_band(s, s->mb_y * 16, 16);
3792 s->first_slice_line = 0;
3794 s->pict_type = P_TYPE;
3797 static void vc1_decode_blocks(VC1Context *v)
3800 v->s.esc3_level_length = 0;
3802 switch(v->s.pict_type) {
3804 if(v->profile == PROFILE_ADVANCED)
3805 vc1_decode_i_blocks_adv(v);
3807 vc1_decode_i_blocks(v);
3810 if(v->p_frame_skipped)
3811 vc1_decode_skip_blocks(v);
3813 vc1_decode_p_blocks(v);
3817 if(v->profile == PROFILE_ADVANCED)
3818 vc1_decode_i_blocks_adv(v);
3820 vc1_decode_i_blocks(v);
3822 vc1_decode_b_blocks(v);
3827 /** Find VC-1 marker in buffer
3828 * @return position where next marker starts or end of buffer if no marker found
3830 static av_always_inline uint8_t* find_next_marker(uint8_t *src, uint8_t *end)
3832 uint32_t mrk = 0xFFFFFFFF;
3834 if(end-src < 4) return end;
3836 mrk = (mrk << 8) | *src++;
3843 static av_always_inline int vc1_unescape_buffer(uint8_t *src, int size, uint8_t *dst)
3848 for(dsize = 0; dsize < size; dsize++) *dst++ = *src++;
3851 for(i = 0; i < size; i++, src++) {
3852 if(src[0] == 3 && i >= 2 && !src[-1] && !src[-2] && i < size-1 && src[1] < 4) {
3853 dst[dsize++] = src[1];
3857 dst[dsize++] = *src;
3862 /** Initialize a VC1/WMV3 decoder
3863 * @todo TODO: Handle VC-1 IDUs (Transport level?)
3864 * @todo TODO: Decypher remaining bits in extra_data
3866 static int vc1_decode_init(AVCodecContext *avctx)
3868 VC1Context *v = avctx->priv_data;
3869 MpegEncContext *s = &v->s;
3872 if (!avctx->extradata_size || !avctx->extradata) return -1;
3873 if (!(avctx->flags & CODEC_FLAG_GRAY))
3874 avctx->pix_fmt = PIX_FMT_YUV420P;
3876 avctx->pix_fmt = PIX_FMT_GRAY8;
3878 avctx->flags |= CODEC_FLAG_EMU_EDGE;
3879 v->s.flags |= CODEC_FLAG_EMU_EDGE;
3881 if(ff_h263_decode_init(avctx) < 0)
3883 if (vc1_init_common(v) < 0) return -1;
3885 avctx->coded_width = avctx->width;
3886 avctx->coded_height = avctx->height;
3887 if (avctx->codec_id == CODEC_ID_WMV3)
3891 // looks like WMV3 has a sequence header stored in the extradata
3892 // advanced sequence header may be before the first frame
3893 // the last byte of the extradata is a version number, 1 for the
3894 // samples we can decode
3896 init_get_bits(&gb, avctx->extradata, avctx->extradata_size*8);
3898 if (decode_sequence_header(avctx, &gb) < 0)
3901 count = avctx->extradata_size*8 - get_bits_count(&gb);
3904 av_log(avctx, AV_LOG_INFO, "Extra data: %i bits left, value: %X\n",
3905 count, get_bits(&gb, count));
3909 av_log(avctx, AV_LOG_INFO, "Read %i bits in overflow\n", -count);
3911 } else { // VC1/WVC1
3912 uint8_t *start = avctx->extradata, *end = avctx->extradata + avctx->extradata_size;
3913 uint8_t *next; int size, buf2_size;
3914 uint8_t *buf2 = NULL;
3915 int seq_inited = 0, ep_inited = 0;
3917 if(avctx->extradata_size < 16) {
3918 av_log(avctx, AV_LOG_ERROR, "Extradata size too small: %i\n", avctx->extradata_size);
3922 buf2 = av_mallocz(avctx->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
3923 if(start[0]) start++; // in WVC1 extradata first byte is its size
3925 for(; next < end; start = next){
3926 next = find_next_marker(start + 4, end);
3927 size = next - start - 4;
3928 if(size <= 0) continue;
3929 buf2_size = vc1_unescape_buffer(start + 4, size, buf2);
3930 init_get_bits(&gb, buf2, buf2_size * 8);
3931 switch(AV_RB32(start)){
3932 case VC1_CODE_SEQHDR:
3933 if(decode_sequence_header(avctx, &gb) < 0){
3939 case VC1_CODE_ENTRYPOINT:
3940 if(decode_entry_point(avctx, &gb) < 0){
3949 if(!seq_inited || !ep_inited){
3950 av_log(avctx, AV_LOG_ERROR, "Incomplete extradata\n");
3954 avctx->has_b_frames= !!(avctx->max_b_frames);
3955 s->low_delay = !avctx->has_b_frames;
3957 s->mb_width = (avctx->coded_width+15)>>4;
3958 s->mb_height = (avctx->coded_height+15)>>4;
3960 /* Allocate mb bitplanes */
3961 v->mv_type_mb_plane = av_malloc(s->mb_stride * s->mb_height);
3962 v->direct_mb_plane = av_malloc(s->mb_stride * s->mb_height);
3963 v->acpred_plane = av_malloc(s->mb_stride * s->mb_height);
3964 v->over_flags_plane = av_malloc(s->mb_stride * s->mb_height);
3966 /* allocate block type info in that way so it could be used with s->block_index[] */
3967 v->mb_type_base = av_malloc(s->b8_stride * (s->mb_height * 2 + 1) + s->mb_stride * (s->mb_height + 1) * 2);
3968 v->mb_type[0] = v->mb_type_base + s->b8_stride + 1;
3969 v->mb_type[1] = v->mb_type_base + s->b8_stride * (s->mb_height * 2 + 1) + s->mb_stride + 1;
3970 v->mb_type[2] = v->mb_type[1] + s->mb_stride * (s->mb_height + 1);
3972 /* Init coded blocks info */
3973 if (v->profile == PROFILE_ADVANCED)
3975 // if (alloc_bitplane(&v->over_flags_plane, s->mb_width, s->mb_height) < 0)
3977 // if (alloc_bitplane(&v->ac_pred_plane, s->mb_width, s->mb_height) < 0)
3985 /** Decode a VC1/WMV3 frame
3986 * @todo TODO: Handle VC-1 IDUs (Transport level?)
3988 static int vc1_decode_frame(AVCodecContext *avctx,
3989 void *data, int *data_size,
3990 uint8_t *buf, int buf_size)
3992 VC1Context *v = avctx->priv_data;
3993 MpegEncContext *s = &v->s;
3994 AVFrame *pict = data;
3995 uint8_t *buf2 = NULL;
3997 /* no supplementary picture */
3998 if (buf_size == 0) {
3999 /* special case for last picture */
4000 if (s->low_delay==0 && s->next_picture_ptr) {
4001 *pict= *(AVFrame*)s->next_picture_ptr;
4002 s->next_picture_ptr= NULL;
4004 *data_size = sizeof(AVFrame);
4010 /* We need to set current_picture_ptr before reading the header,
4011 * otherwise we cannot store anything in there. */
4012 if(s->current_picture_ptr==NULL || s->current_picture_ptr->data[0]){
4013 int i= ff_find_unused_picture(s, 0);
4014 s->current_picture_ptr= &s->picture[i];
4017 //for advanced profile we may need to parse and unescape data
4018 if (avctx->codec_id == CODEC_ID_VC1) {
4020 buf2 = av_mallocz(buf_size + FF_INPUT_BUFFER_PADDING_SIZE);
4022 if(IS_MARKER(AV_RB32(buf))){ /* frame starts with marker and needs to be parsed */
4023 uint8_t *start, *end, *next;
4027 for(start = buf, end = buf + buf_size; next < end; start = next){
4028 next = find_next_marker(start + 4, end);
4029 size = next - start - 4;
4030 if(size <= 0) continue;
4031 switch(AV_RB32(start)){
4032 case VC1_CODE_FRAME:
4033 buf_size2 = vc1_unescape_buffer(start + 4, size, buf2);
4035 case VC1_CODE_ENTRYPOINT: /* it should be before frame data */
4036 buf_size2 = vc1_unescape_buffer(start + 4, size, buf2);
4037 init_get_bits(&s->gb, buf2, buf_size2*8);
4038 decode_entry_point(avctx, &s->gb);
4040 case VC1_CODE_SLICE:
4041 av_log(avctx, AV_LOG_ERROR, "Sliced decoding is not implemented (yet)\n");
4046 }else if(v->interlace && ((buf[0] & 0xC0) == 0xC0)){ /* WVC1 interlaced stores both fields divided by marker */
4049 divider = find_next_marker(buf, buf + buf_size);
4050 if((divider == (buf + buf_size)) || AV_RB32(divider) != VC1_CODE_FIELD){
4051 av_log(avctx, AV_LOG_ERROR, "Error in WVC1 interlaced frame\n");
4055 buf_size2 = vc1_unescape_buffer(buf, divider - buf, buf2);
4057 av_free(buf2);return -1;
4059 buf_size2 = vc1_unescape_buffer(buf, buf_size, buf2);
4061 init_get_bits(&s->gb, buf2, buf_size2*8);
4063 init_get_bits(&s->gb, buf, buf_size*8);
4064 // do parse frame header
4065 if(v->profile < PROFILE_ADVANCED) {
4066 if(vc1_parse_frame_header(v, &s->gb) == -1) {
4071 if(vc1_parse_frame_header_adv(v, &s->gb) == -1) {
4077 if(s->pict_type != I_TYPE && !v->res_rtm_flag){
4083 s->current_picture.pict_type= s->pict_type;
4084 s->current_picture.key_frame= s->pict_type == I_TYPE;
4086 /* skip B-frames if we don't have reference frames */
4087 if(s->last_picture_ptr==NULL && (s->pict_type==B_TYPE || s->dropable)){
4089 return -1;//buf_size;
4091 /* skip b frames if we are in a hurry */
4092 if(avctx->hurry_up && s->pict_type==B_TYPE) return -1;//buf_size;
4093 if( (avctx->skip_frame >= AVDISCARD_NONREF && s->pict_type==B_TYPE)
4094 || (avctx->skip_frame >= AVDISCARD_NONKEY && s->pict_type!=I_TYPE)
4095 || avctx->skip_frame >= AVDISCARD_ALL) {
4099 /* skip everything if we are in a hurry>=5 */
4100 if(avctx->hurry_up>=5) {
4102 return -1;//buf_size;
4105 if(s->next_p_frame_damaged){
4106 if(s->pict_type==B_TYPE)
4109 s->next_p_frame_damaged=0;
4112 if(MPV_frame_start(s, avctx) < 0) {
4117 ff_er_frame_start(s);
4119 v->bits = buf_size * 8;
4120 vc1_decode_blocks(v);
4121 //av_log(s->avctx, AV_LOG_INFO, "Consumed %i/%i bits\n", get_bits_count(&s->gb), buf_size*8);
4122 // if(get_bits_count(&s->gb) > buf_size * 8)
4128 assert(s->current_picture.pict_type == s->current_picture_ptr->pict_type);
4129 assert(s->current_picture.pict_type == s->pict_type);
4130 if (s->pict_type == B_TYPE || s->low_delay) {
4131 *pict= *(AVFrame*)s->current_picture_ptr;
4132 } else if (s->last_picture_ptr != NULL) {
4133 *pict= *(AVFrame*)s->last_picture_ptr;
4136 if(s->last_picture_ptr || s->low_delay){
4137 *data_size = sizeof(AVFrame);
4138 ff_print_debug_info(s, pict);
4141 /* Return the Picture timestamp as the frame number */
4142 /* we substract 1 because it is added on utils.c */
4143 avctx->frame_number = s->picture_number - 1;
4150 /** Close a VC1/WMV3 decoder
4151 * @warning Initial try at using MpegEncContext stuff
4153 static int vc1_decode_end(AVCodecContext *avctx)
4155 VC1Context *v = avctx->priv_data;
4157 av_freep(&v->hrd_rate);
4158 av_freep(&v->hrd_buffer);
4159 MPV_common_end(&v->s);
4160 av_freep(&v->mv_type_mb_plane);
4161 av_freep(&v->direct_mb_plane);
4162 av_freep(&v->acpred_plane);
4163 av_freep(&v->over_flags_plane);
4164 av_freep(&v->mb_type_base);
4169 AVCodec vc1_decoder = {
4182 AVCodec wmv3_decoder = {