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"
36 #include "simple_idct.h"
41 #define MB_INTRA_VLC_BITS 9
44 static const uint16_t table_mb_intra[64][2];
48 * Init VC-1 specific tables and VC1Context members
49 * @param v The VC1Context to initialize
52 static int vc1_init_common(VC1Context *v)
57 v->hrd_rate = v->hrd_buffer = NULL;
63 init_vlc(&ff_vc1_bfraction_vlc, VC1_BFRACTION_VLC_BITS, 23,
64 ff_vc1_bfraction_bits, 1, 1,
65 ff_vc1_bfraction_codes, 1, 1, 1);
66 init_vlc(&ff_vc1_norm2_vlc, VC1_NORM2_VLC_BITS, 4,
67 ff_vc1_norm2_bits, 1, 1,
68 ff_vc1_norm2_codes, 1, 1, 1);
69 init_vlc(&ff_vc1_norm6_vlc, VC1_NORM6_VLC_BITS, 64,
70 ff_vc1_norm6_bits, 1, 1,
71 ff_vc1_norm6_codes, 2, 2, 1);
72 init_vlc(&ff_vc1_imode_vlc, VC1_IMODE_VLC_BITS, 7,
73 ff_vc1_imode_bits, 1, 1,
74 ff_vc1_imode_codes, 1, 1, 1);
77 init_vlc(&ff_vc1_ttmb_vlc[i], VC1_TTMB_VLC_BITS, 16,
78 ff_vc1_ttmb_bits[i], 1, 1,
79 ff_vc1_ttmb_codes[i], 2, 2, 1);
80 init_vlc(&ff_vc1_ttblk_vlc[i], VC1_TTBLK_VLC_BITS, 8,
81 ff_vc1_ttblk_bits[i], 1, 1,
82 ff_vc1_ttblk_codes[i], 1, 1, 1);
83 init_vlc(&ff_vc1_subblkpat_vlc[i], VC1_SUBBLKPAT_VLC_BITS, 15,
84 ff_vc1_subblkpat_bits[i], 1, 1,
85 ff_vc1_subblkpat_codes[i], 1, 1, 1);
89 init_vlc(&ff_vc1_4mv_block_pattern_vlc[i], VC1_4MV_BLOCK_PATTERN_VLC_BITS, 16,
90 ff_vc1_4mv_block_pattern_bits[i], 1, 1,
91 ff_vc1_4mv_block_pattern_codes[i], 1, 1, 1);
92 init_vlc(&ff_vc1_cbpcy_p_vlc[i], VC1_CBPCY_P_VLC_BITS, 64,
93 ff_vc1_cbpcy_p_bits[i], 1, 1,
94 ff_vc1_cbpcy_p_codes[i], 2, 2, 1);
95 init_vlc(&ff_vc1_mv_diff_vlc[i], VC1_MV_DIFF_VLC_BITS, 73,
96 ff_vc1_mv_diff_bits[i], 1, 1,
97 ff_vc1_mv_diff_codes[i], 2, 2, 1);
100 init_vlc(&ff_vc1_ac_coeff_table[i], AC_VLC_BITS, vc1_ac_sizes[i],
101 &vc1_ac_tables[i][0][1], 8, 4,
102 &vc1_ac_tables[i][0][0], 8, 4, 1);
103 init_vlc(&ff_msmp4_mb_i_vlc, MB_INTRA_VLC_BITS, 64,
104 &ff_msmp4_mb_i_table[0][1], 4, 2,
105 &ff_msmp4_mb_i_table[0][0], 4, 2, 1);
110 v->mvrange = 0; /* 7.1.1.18, p80 */
115 /***********************************************************************/
117 * @defgroup bitplane VC9 Bitplane decoding
122 /** @addtogroup bitplane
135 /** @} */ //imode defines
137 /** Decode rows by checking if they are skipped
138 * @param plane Buffer to store decoded bits
139 * @param[in] width Width of this buffer
140 * @param[in] height Height of this buffer
141 * @param[in] stride of this buffer
143 static void decode_rowskip(uint8_t* plane, int width, int height, int stride, GetBitContext *gb){
146 for (y=0; y<height; y++){
147 if (!get_bits1(gb)) //rowskip
148 memset(plane, 0, width);
150 for (x=0; x<width; x++)
151 plane[x] = get_bits1(gb);
156 /** Decode columns by checking if they are skipped
157 * @param plane Buffer to store decoded bits
158 * @param[in] width Width of this buffer
159 * @param[in] height Height of this buffer
160 * @param[in] stride of this buffer
161 * @todo FIXME: Optimize
163 static void decode_colskip(uint8_t* plane, int width, int height, int stride, GetBitContext *gb){
166 for (x=0; x<width; x++){
167 if (!get_bits1(gb)) //colskip
168 for (y=0; y<height; y++)
171 for (y=0; y<height; y++)
172 plane[y*stride] = get_bits1(gb);
177 /** Decode a bitplane's bits
178 * @param bp Bitplane where to store the decode bits
179 * @param v VC-1 context for bit reading and logging
181 * @todo FIXME: Optimize
183 static int bitplane_decoding(uint8_t* data, int *raw_flag, VC1Context *v)
185 GetBitContext *gb = &v->s.gb;
187 int imode, x, y, code, offset;
188 uint8_t invert, *planep = data;
189 int width, height, stride;
191 width = v->s.mb_width;
192 height = v->s.mb_height;
193 stride = v->s.mb_stride;
194 invert = get_bits1(gb);
195 imode = get_vlc2(gb, ff_vc1_imode_vlc.table, VC1_IMODE_VLC_BITS, 1);
201 //Data is actually read in the MB layer (same for all tests == "raw")
202 *raw_flag = 1; //invert ignored
206 if ((height * width) & 1)
208 *planep++ = get_bits1(gb);
212 // decode bitplane as one long line
213 for (y = offset; y < height * width; y += 2) {
214 code = get_vlc2(gb, ff_vc1_norm2_vlc.table, VC1_NORM2_VLC_BITS, 1);
215 *planep++ = code & 1;
217 if(offset == width) {
219 planep += stride - width;
221 *planep++ = code >> 1;
223 if(offset == width) {
225 planep += stride - width;
231 if(!(height % 3) && (width % 3)) { // use 2x3 decoding
232 for(y = 0; y < height; y+= 3) {
233 for(x = width & 1; x < width; x += 2) {
234 code = get_vlc2(gb, ff_vc1_norm6_vlc.table, VC1_NORM6_VLC_BITS, 2);
236 av_log(v->s.avctx, AV_LOG_DEBUG, "invalid NORM-6 VLC\n");
239 planep[x + 0] = (code >> 0) & 1;
240 planep[x + 1] = (code >> 1) & 1;
241 planep[x + 0 + stride] = (code >> 2) & 1;
242 planep[x + 1 + stride] = (code >> 3) & 1;
243 planep[x + 0 + stride * 2] = (code >> 4) & 1;
244 planep[x + 1 + stride * 2] = (code >> 5) & 1;
246 planep += stride * 3;
248 if(width & 1) decode_colskip(data, 1, height, stride, &v->s.gb);
250 planep += (height & 1) * stride;
251 for(y = height & 1; y < height; y += 2) {
252 for(x = width % 3; x < width; x += 3) {
253 code = get_vlc2(gb, ff_vc1_norm6_vlc.table, VC1_NORM6_VLC_BITS, 2);
255 av_log(v->s.avctx, AV_LOG_DEBUG, "invalid NORM-6 VLC\n");
258 planep[x + 0] = (code >> 0) & 1;
259 planep[x + 1] = (code >> 1) & 1;
260 planep[x + 2] = (code >> 2) & 1;
261 planep[x + 0 + stride] = (code >> 3) & 1;
262 planep[x + 1 + stride] = (code >> 4) & 1;
263 planep[x + 2 + stride] = (code >> 5) & 1;
265 planep += stride * 2;
268 if(x) decode_colskip(data , x, height , stride, &v->s.gb);
269 if(height & 1) decode_rowskip(data+x, width - x, 1, stride, &v->s.gb);
273 decode_rowskip(data, width, height, stride, &v->s.gb);
276 decode_colskip(data, width, height, stride, &v->s.gb);
281 /* Applying diff operator */
282 if (imode == IMODE_DIFF2 || imode == IMODE_DIFF6)
286 for (x=1; x<width; x++)
287 planep[x] ^= planep[x-1];
288 for (y=1; y<height; y++)
291 planep[0] ^= planep[-stride];
292 for (x=1; x<width; x++)
294 if (planep[x-1] != planep[x-stride]) planep[x] ^= invert;
295 else planep[x] ^= planep[x-1];
302 for (x=0; x<stride*height; x++) planep[x] = !planep[x]; //FIXME stride
304 return (imode<<1) + invert;
307 /** @} */ //Bitplane group
309 /***********************************************************************/
310 /** VOP Dquant decoding
311 * @param v VC-1 Context
313 static int vop_dquant_decoding(VC1Context *v)
315 GetBitContext *gb = &v->s.gb;
321 pqdiff = get_bits(gb, 3);
322 if (pqdiff == 7) v->altpq = get_bits(gb, 5);
323 else v->altpq = v->pq + pqdiff + 1;
327 v->dquantfrm = get_bits1(gb);
330 v->dqprofile = get_bits(gb, 2);
331 switch (v->dqprofile)
333 case DQPROFILE_SINGLE_EDGE:
334 case DQPROFILE_DOUBLE_EDGES:
335 v->dqsbedge = get_bits(gb, 2);
337 case DQPROFILE_ALL_MBS:
338 v->dqbilevel = get_bits1(gb);
341 default: break; //Forbidden ?
343 if (v->dqbilevel || v->dqprofile != DQPROFILE_ALL_MBS)
345 pqdiff = get_bits(gb, 3);
346 if (pqdiff == 7) v->altpq = get_bits(gb, 5);
347 else v->altpq = v->pq + pqdiff + 1;
354 /** Put block onto picture
356 static void vc1_put_block(VC1Context *v, DCTELEM block[6][64])
360 DSPContext *dsp = &v->s.dsp;
364 for(k = 0; k < 6; k++)
365 for(j = 0; j < 8; j++)
366 for(i = 0; i < 8; i++)
367 block[k][i + j*8] = ((block[k][i + j*8] - 128) << 1) + 128;
370 ys = v->s.current_picture.linesize[0];
371 us = v->s.current_picture.linesize[1];
372 vs = v->s.current_picture.linesize[2];
375 dsp->put_pixels_clamped(block[0], Y, ys);
376 dsp->put_pixels_clamped(block[1], Y + 8, ys);
378 dsp->put_pixels_clamped(block[2], Y, ys);
379 dsp->put_pixels_clamped(block[3], Y + 8, ys);
381 if(!(v->s.flags & CODEC_FLAG_GRAY)) {
382 dsp->put_pixels_clamped(block[4], v->s.dest[1], us);
383 dsp->put_pixels_clamped(block[5], v->s.dest[2], vs);
387 /** Do motion compensation over 1 macroblock
388 * Mostly adapted hpel_motion and qpel_motion from mpegvideo.c
390 static void vc1_mc_1mv(VC1Context *v, int dir)
392 MpegEncContext *s = &v->s;
393 DSPContext *dsp = &v->s.dsp;
394 uint8_t *srcY, *srcU, *srcV;
395 int dxy, uvdxy, mx, my, uvmx, uvmy, src_x, src_y, uvsrc_x, uvsrc_y;
397 if(!v->s.last_picture.data[0])return;
399 mx = s->mv[dir][0][0];
400 my = s->mv[dir][0][1];
402 // store motion vectors for further use in B frames
403 if(s->pict_type == P_TYPE) {
404 s->current_picture.motion_val[1][s->block_index[0]][0] = mx;
405 s->current_picture.motion_val[1][s->block_index[0]][1] = my;
407 uvmx = (mx + ((mx & 3) == 3)) >> 1;
408 uvmy = (my + ((my & 3) == 3)) >> 1;
410 uvmx = uvmx + ((uvmx<0)?(uvmx&1):-(uvmx&1));
411 uvmy = uvmy + ((uvmy<0)?(uvmy&1):-(uvmy&1));
414 srcY = s->last_picture.data[0];
415 srcU = s->last_picture.data[1];
416 srcV = s->last_picture.data[2];
418 srcY = s->next_picture.data[0];
419 srcU = s->next_picture.data[1];
420 srcV = s->next_picture.data[2];
423 src_x = s->mb_x * 16 + (mx >> 2);
424 src_y = s->mb_y * 16 + (my >> 2);
425 uvsrc_x = s->mb_x * 8 + (uvmx >> 2);
426 uvsrc_y = s->mb_y * 8 + (uvmy >> 2);
428 if(v->profile != PROFILE_ADVANCED){
429 src_x = av_clip( src_x, -16, s->mb_width * 16);
430 src_y = av_clip( src_y, -16, s->mb_height * 16);
431 uvsrc_x = av_clip(uvsrc_x, -8, s->mb_width * 8);
432 uvsrc_y = av_clip(uvsrc_y, -8, s->mb_height * 8);
434 src_x = av_clip( src_x, -17, s->avctx->coded_width);
435 src_y = av_clip( src_y, -18, s->avctx->coded_height + 1);
436 uvsrc_x = av_clip(uvsrc_x, -8, s->avctx->coded_width >> 1);
437 uvsrc_y = av_clip(uvsrc_y, -8, s->avctx->coded_height >> 1);
440 srcY += src_y * s->linesize + src_x;
441 srcU += uvsrc_y * s->uvlinesize + uvsrc_x;
442 srcV += uvsrc_y * s->uvlinesize + uvsrc_x;
444 /* for grayscale we should not try to read from unknown area */
445 if(s->flags & CODEC_FLAG_GRAY) {
446 srcU = s->edge_emu_buffer + 18 * s->linesize;
447 srcV = s->edge_emu_buffer + 18 * s->linesize;
450 if(v->rangeredfrm || (v->mv_mode == MV_PMODE_INTENSITY_COMP)
451 || (unsigned)(src_x - s->mspel) > s->h_edge_pos - (mx&3) - 16 - s->mspel*3
452 || (unsigned)(src_y - s->mspel) > s->v_edge_pos - (my&3) - 16 - s->mspel*3){
453 uint8_t *uvbuf= s->edge_emu_buffer + 19 * s->linesize;
455 srcY -= s->mspel * (1 + s->linesize);
456 ff_emulated_edge_mc(s->edge_emu_buffer, srcY, s->linesize, 17+s->mspel*2, 17+s->mspel*2,
457 src_x - s->mspel, src_y - s->mspel, s->h_edge_pos, s->v_edge_pos);
458 srcY = s->edge_emu_buffer;
459 ff_emulated_edge_mc(uvbuf , srcU, s->uvlinesize, 8+1, 8+1,
460 uvsrc_x, uvsrc_y, s->h_edge_pos >> 1, s->v_edge_pos >> 1);
461 ff_emulated_edge_mc(uvbuf + 16, srcV, s->uvlinesize, 8+1, 8+1,
462 uvsrc_x, uvsrc_y, s->h_edge_pos >> 1, s->v_edge_pos >> 1);
465 /* if we deal with range reduction we need to scale source blocks */
471 for(j = 0; j < 17 + s->mspel*2; j++) {
472 for(i = 0; i < 17 + s->mspel*2; i++) src[i] = ((src[i] - 128) >> 1) + 128;
475 src = srcU; src2 = srcV;
476 for(j = 0; j < 9; j++) {
477 for(i = 0; i < 9; i++) {
478 src[i] = ((src[i] - 128) >> 1) + 128;
479 src2[i] = ((src2[i] - 128) >> 1) + 128;
481 src += s->uvlinesize;
482 src2 += s->uvlinesize;
485 /* if we deal with intensity compensation we need to scale source blocks */
486 if(v->mv_mode == MV_PMODE_INTENSITY_COMP) {
491 for(j = 0; j < 17 + s->mspel*2; j++) {
492 for(i = 0; i < 17 + s->mspel*2; i++) src[i] = v->luty[src[i]];
495 src = srcU; src2 = srcV;
496 for(j = 0; j < 9; j++) {
497 for(i = 0; i < 9; i++) {
498 src[i] = v->lutuv[src[i]];
499 src2[i] = v->lutuv[src2[i]];
501 src += s->uvlinesize;
502 src2 += s->uvlinesize;
505 srcY += s->mspel * (1 + s->linesize);
509 dxy = ((my & 3) << 2) | (mx & 3);
510 dsp->put_vc1_mspel_pixels_tab[dxy](s->dest[0] , srcY , s->linesize, v->rnd);
511 dsp->put_vc1_mspel_pixels_tab[dxy](s->dest[0] + 8, srcY + 8, s->linesize, v->rnd);
512 srcY += s->linesize * 8;
513 dsp->put_vc1_mspel_pixels_tab[dxy](s->dest[0] + 8 * s->linesize , srcY , s->linesize, v->rnd);
514 dsp->put_vc1_mspel_pixels_tab[dxy](s->dest[0] + 8 * s->linesize + 8, srcY + 8, s->linesize, v->rnd);
515 } else { // hpel mc - always used for luma
516 dxy = (my & 2) | ((mx & 2) >> 1);
519 dsp->put_pixels_tab[0][dxy](s->dest[0], srcY, s->linesize, 16);
521 dsp->put_no_rnd_pixels_tab[0][dxy](s->dest[0], srcY, s->linesize, 16);
524 if(s->flags & CODEC_FLAG_GRAY) return;
525 /* Chroma MC always uses qpel bilinear */
526 uvdxy = ((uvmy & 3) << 2) | (uvmx & 3);
530 dsp->put_h264_chroma_pixels_tab[0](s->dest[1], srcU, s->uvlinesize, 8, uvmx, uvmy);
531 dsp->put_h264_chroma_pixels_tab[0](s->dest[2], srcV, s->uvlinesize, 8, uvmx, uvmy);
533 dsp->put_no_rnd_h264_chroma_pixels_tab[0](s->dest[1], srcU, s->uvlinesize, 8, uvmx, uvmy);
534 dsp->put_no_rnd_h264_chroma_pixels_tab[0](s->dest[2], srcV, s->uvlinesize, 8, uvmx, uvmy);
538 /** Do motion compensation for 4-MV macroblock - luminance block
540 static void vc1_mc_4mv_luma(VC1Context *v, int n)
542 MpegEncContext *s = &v->s;
543 DSPContext *dsp = &v->s.dsp;
545 int dxy, mx, my, src_x, src_y;
548 if(!v->s.last_picture.data[0])return;
551 srcY = s->last_picture.data[0];
553 off = s->linesize * 4 * (n&2) + (n&1) * 8;
555 src_x = s->mb_x * 16 + (n&1) * 8 + (mx >> 2);
556 src_y = s->mb_y * 16 + (n&2) * 4 + (my >> 2);
558 if(v->profile != PROFILE_ADVANCED){
559 src_x = av_clip( src_x, -16, s->mb_width * 16);
560 src_y = av_clip( src_y, -16, s->mb_height * 16);
562 src_x = av_clip( src_x, -17, s->avctx->coded_width);
563 src_y = av_clip( src_y, -18, s->avctx->coded_height + 1);
566 srcY += src_y * s->linesize + src_x;
568 if(v->rangeredfrm || (v->mv_mode == MV_PMODE_INTENSITY_COMP)
569 || (unsigned)(src_x - s->mspel) > s->h_edge_pos - (mx&3) - 8 - s->mspel*2
570 || (unsigned)(src_y - s->mspel) > s->v_edge_pos - (my&3) - 8 - s->mspel*2){
571 srcY -= s->mspel * (1 + s->linesize);
572 ff_emulated_edge_mc(s->edge_emu_buffer, srcY, s->linesize, 9+s->mspel*2, 9+s->mspel*2,
573 src_x - s->mspel, src_y - s->mspel, s->h_edge_pos, s->v_edge_pos);
574 srcY = s->edge_emu_buffer;
575 /* if we deal with range reduction we need to scale source blocks */
581 for(j = 0; j < 9 + s->mspel*2; j++) {
582 for(i = 0; i < 9 + s->mspel*2; i++) src[i] = ((src[i] - 128) >> 1) + 128;
586 /* if we deal with intensity compensation we need to scale source blocks */
587 if(v->mv_mode == MV_PMODE_INTENSITY_COMP) {
592 for(j = 0; j < 9 + s->mspel*2; j++) {
593 for(i = 0; i < 9 + s->mspel*2; i++) src[i] = v->luty[src[i]];
597 srcY += s->mspel * (1 + s->linesize);
601 dxy = ((my & 3) << 2) | (mx & 3);
602 dsp->put_vc1_mspel_pixels_tab[dxy](s->dest[0] + off, srcY, s->linesize, v->rnd);
603 } else { // hpel mc - always used for luma
604 dxy = (my & 2) | ((mx & 2) >> 1);
606 dsp->put_pixels_tab[1][dxy](s->dest[0] + off, srcY, s->linesize, 8);
608 dsp->put_no_rnd_pixels_tab[1][dxy](s->dest[0] + off, srcY, s->linesize, 8);
612 static inline int median4(int a, int b, int c, int d)
615 if(c < d) return (FFMIN(b, d) + FFMAX(a, c)) / 2;
616 else return (FFMIN(b, c) + FFMAX(a, d)) / 2;
618 if(c < d) return (FFMIN(a, d) + FFMAX(b, c)) / 2;
619 else return (FFMIN(a, c) + FFMAX(b, d)) / 2;
624 /** Do motion compensation for 4-MV macroblock - both chroma blocks
626 static void vc1_mc_4mv_chroma(VC1Context *v)
628 MpegEncContext *s = &v->s;
629 DSPContext *dsp = &v->s.dsp;
630 uint8_t *srcU, *srcV;
631 int uvdxy, uvmx, uvmy, uvsrc_x, uvsrc_y;
632 int i, idx, tx = 0, ty = 0;
633 int mvx[4], mvy[4], intra[4];
634 static const int count[16] = { 0, 1, 1, 2, 1, 2, 2, 3, 1, 2, 2, 3, 2, 3, 3, 4};
636 if(!v->s.last_picture.data[0])return;
637 if(s->flags & CODEC_FLAG_GRAY) return;
639 for(i = 0; i < 4; i++) {
640 mvx[i] = s->mv[0][i][0];
641 mvy[i] = s->mv[0][i][1];
642 intra[i] = v->mb_type[0][s->block_index[i]];
645 /* calculate chroma MV vector from four luma MVs */
646 idx = (intra[3] << 3) | (intra[2] << 2) | (intra[1] << 1) | intra[0];
647 if(!idx) { // all blocks are inter
648 tx = median4(mvx[0], mvx[1], mvx[2], mvx[3]);
649 ty = median4(mvy[0], mvy[1], mvy[2], mvy[3]);
650 } else if(count[idx] == 1) { // 3 inter blocks
653 tx = mid_pred(mvx[1], mvx[2], mvx[3]);
654 ty = mid_pred(mvy[1], mvy[2], mvy[3]);
657 tx = mid_pred(mvx[0], mvx[2], mvx[3]);
658 ty = mid_pred(mvy[0], mvy[2], mvy[3]);
661 tx = mid_pred(mvx[0], mvx[1], mvx[3]);
662 ty = mid_pred(mvy[0], mvy[1], mvy[3]);
665 tx = mid_pred(mvx[0], mvx[1], mvx[2]);
666 ty = mid_pred(mvy[0], mvy[1], mvy[2]);
669 } else if(count[idx] == 2) {
671 for(i=0; i<3;i++) if(!intra[i]) {t1 = i; break;}
672 for(i= t1+1; i<4; i++)if(!intra[i]) {t2 = i; break;}
673 tx = (mvx[t1] + mvx[t2]) / 2;
674 ty = (mvy[t1] + mvy[t2]) / 2;
676 s->current_picture.motion_val[1][s->block_index[0]][0] = 0;
677 s->current_picture.motion_val[1][s->block_index[0]][1] = 0;
678 return; //no need to do MC for inter blocks
681 s->current_picture.motion_val[1][s->block_index[0]][0] = tx;
682 s->current_picture.motion_val[1][s->block_index[0]][1] = ty;
683 uvmx = (tx + ((tx&3) == 3)) >> 1;
684 uvmy = (ty + ((ty&3) == 3)) >> 1;
686 uvmx = uvmx + ((uvmx<0)?(uvmx&1):-(uvmx&1));
687 uvmy = uvmy + ((uvmy<0)?(uvmy&1):-(uvmy&1));
690 uvsrc_x = s->mb_x * 8 + (uvmx >> 2);
691 uvsrc_y = s->mb_y * 8 + (uvmy >> 2);
693 if(v->profile != PROFILE_ADVANCED){
694 uvsrc_x = av_clip(uvsrc_x, -8, s->mb_width * 8);
695 uvsrc_y = av_clip(uvsrc_y, -8, s->mb_height * 8);
697 uvsrc_x = av_clip(uvsrc_x, -8, s->avctx->coded_width >> 1);
698 uvsrc_y = av_clip(uvsrc_y, -8, s->avctx->coded_height >> 1);
701 srcU = s->last_picture.data[1] + uvsrc_y * s->uvlinesize + uvsrc_x;
702 srcV = s->last_picture.data[2] + uvsrc_y * s->uvlinesize + uvsrc_x;
703 if(v->rangeredfrm || (v->mv_mode == MV_PMODE_INTENSITY_COMP)
704 || (unsigned)uvsrc_x > (s->h_edge_pos >> 1) - 9
705 || (unsigned)uvsrc_y > (s->v_edge_pos >> 1) - 9){
706 ff_emulated_edge_mc(s->edge_emu_buffer , srcU, s->uvlinesize, 8+1, 8+1,
707 uvsrc_x, uvsrc_y, s->h_edge_pos >> 1, s->v_edge_pos >> 1);
708 ff_emulated_edge_mc(s->edge_emu_buffer + 16, srcV, s->uvlinesize, 8+1, 8+1,
709 uvsrc_x, uvsrc_y, s->h_edge_pos >> 1, s->v_edge_pos >> 1);
710 srcU = s->edge_emu_buffer;
711 srcV = s->edge_emu_buffer + 16;
713 /* if we deal with range reduction we need to scale source blocks */
718 src = srcU; src2 = srcV;
719 for(j = 0; j < 9; j++) {
720 for(i = 0; i < 9; i++) {
721 src[i] = ((src[i] - 128) >> 1) + 128;
722 src2[i] = ((src2[i] - 128) >> 1) + 128;
724 src += s->uvlinesize;
725 src2 += s->uvlinesize;
728 /* if we deal with intensity compensation we need to scale source blocks */
729 if(v->mv_mode == MV_PMODE_INTENSITY_COMP) {
733 src = srcU; src2 = srcV;
734 for(j = 0; j < 9; j++) {
735 for(i = 0; i < 9; i++) {
736 src[i] = v->lutuv[src[i]];
737 src2[i] = v->lutuv[src2[i]];
739 src += s->uvlinesize;
740 src2 += s->uvlinesize;
745 /* Chroma MC always uses qpel bilinear */
746 uvdxy = ((uvmy & 3) << 2) | (uvmx & 3);
750 dsp->put_h264_chroma_pixels_tab[0](s->dest[1], srcU, s->uvlinesize, 8, uvmx, uvmy);
751 dsp->put_h264_chroma_pixels_tab[0](s->dest[2], srcV, s->uvlinesize, 8, uvmx, uvmy);
753 dsp->put_no_rnd_h264_chroma_pixels_tab[0](s->dest[1], srcU, s->uvlinesize, 8, uvmx, uvmy);
754 dsp->put_no_rnd_h264_chroma_pixels_tab[0](s->dest[2], srcV, s->uvlinesize, 8, uvmx, uvmy);
758 static int decode_sequence_header_adv(VC1Context *v, GetBitContext *gb);
761 * Decode Simple/Main Profiles sequence header
762 * @see Figure 7-8, p16-17
763 * @param avctx Codec context
764 * @param gb GetBit context initialized from Codec context extra_data
767 static int decode_sequence_header(AVCodecContext *avctx, GetBitContext *gb)
769 VC1Context *v = avctx->priv_data;
771 av_log(avctx, AV_LOG_DEBUG, "Header: %0X\n", show_bits(gb, 32));
772 v->profile = get_bits(gb, 2);
773 if (v->profile == PROFILE_COMPLEX)
775 av_log(avctx, AV_LOG_ERROR, "WMV3 Complex Profile is not fully supported\n");
778 if (v->profile == PROFILE_ADVANCED)
780 return decode_sequence_header_adv(v, gb);
784 v->res_sm = get_bits(gb, 2); //reserved
787 av_log(avctx, AV_LOG_ERROR,
788 "Reserved RES_SM=%i is forbidden\n", v->res_sm);
794 v->frmrtq_postproc = get_bits(gb, 3); //common
795 // (bitrate-32kbps)/64kbps
796 v->bitrtq_postproc = get_bits(gb, 5); //common
797 v->s.loop_filter = get_bits1(gb); //common
798 if(v->s.loop_filter == 1 && v->profile == PROFILE_SIMPLE)
800 av_log(avctx, AV_LOG_ERROR,
801 "LOOPFILTER shell not be enabled in simple profile\n");
804 v->res_x8 = get_bits1(gb); //reserved
805 v->multires = get_bits1(gb);
806 v->res_fasttx = get_bits1(gb);
809 v->s.dsp.vc1_inv_trans_8x8 = ff_simple_idct;
810 v->s.dsp.vc1_inv_trans_8x4 = ff_simple_idct84_add;
811 v->s.dsp.vc1_inv_trans_4x8 = ff_simple_idct48_add;
812 v->s.dsp.vc1_inv_trans_4x4 = ff_simple_idct44_add;
815 v->fastuvmc = get_bits1(gb); //common
816 if (!v->profile && !v->fastuvmc)
818 av_log(avctx, AV_LOG_ERROR,
819 "FASTUVMC unavailable in Simple Profile\n");
822 v->extended_mv = get_bits1(gb); //common
823 if (!v->profile && v->extended_mv)
825 av_log(avctx, AV_LOG_ERROR,
826 "Extended MVs unavailable in Simple Profile\n");
829 v->dquant = get_bits(gb, 2); //common
830 v->vstransform = get_bits1(gb); //common
832 v->res_transtab = get_bits1(gb);
835 av_log(avctx, AV_LOG_ERROR,
836 "1 for reserved RES_TRANSTAB is forbidden\n");
840 v->overlap = get_bits1(gb); //common
842 v->s.resync_marker = get_bits1(gb);
843 v->rangered = get_bits1(gb);
844 if (v->rangered && v->profile == PROFILE_SIMPLE)
846 av_log(avctx, AV_LOG_INFO,
847 "RANGERED should be set to 0 in simple profile\n");
850 v->s.max_b_frames = avctx->max_b_frames = get_bits(gb, 3); //common
851 v->quantizer_mode = get_bits(gb, 2); //common
853 v->finterpflag = get_bits1(gb); //common
854 v->res_rtm_flag = get_bits1(gb); //reserved
855 if (!v->res_rtm_flag)
857 // av_log(avctx, AV_LOG_ERROR,
858 // "0 for reserved RES_RTM_FLAG is forbidden\n");
859 av_log(avctx, AV_LOG_ERROR,
860 "Old WMV3 version detected, only I-frames will be decoded\n");
863 //TODO: figure out what they mean (always 0x402F)
864 if(!v->res_fasttx) skip_bits(gb, 16);
865 av_log(avctx, AV_LOG_DEBUG,
866 "Profile %i:\nfrmrtq_postproc=%i, bitrtq_postproc=%i\n"
867 "LoopFilter=%i, MultiRes=%i, FastUVMC=%i, Extended MV=%i\n"
868 "Rangered=%i, VSTransform=%i, Overlap=%i, SyncMarker=%i\n"
869 "DQuant=%i, Quantizer mode=%i, Max B frames=%i\n",
870 v->profile, v->frmrtq_postproc, v->bitrtq_postproc,
871 v->s.loop_filter, v->multires, v->fastuvmc, v->extended_mv,
872 v->rangered, v->vstransform, v->overlap, v->s.resync_marker,
873 v->dquant, v->quantizer_mode, avctx->max_b_frames
878 static int decode_sequence_header_adv(VC1Context *v, GetBitContext *gb)
881 v->level = get_bits(gb, 3);
884 av_log(v->s.avctx, AV_LOG_ERROR, "Reserved LEVEL %i\n",v->level);
886 v->chromaformat = get_bits(gb, 2);
887 if (v->chromaformat != 1)
889 av_log(v->s.avctx, AV_LOG_ERROR,
890 "Only 4:2:0 chroma format supported\n");
895 v->frmrtq_postproc = get_bits(gb, 3); //common
896 // (bitrate-32kbps)/64kbps
897 v->bitrtq_postproc = get_bits(gb, 5); //common
898 v->postprocflag = get_bits1(gb); //common
900 v->s.avctx->coded_width = (get_bits(gb, 12) + 1) << 1;
901 v->s.avctx->coded_height = (get_bits(gb, 12) + 1) << 1;
902 v->s.avctx->width = v->s.avctx->coded_width;
903 v->s.avctx->height = v->s.avctx->coded_height;
904 v->broadcast = get_bits1(gb);
905 v->interlace = get_bits1(gb);
906 v->tfcntrflag = get_bits1(gb);
907 v->finterpflag = get_bits1(gb);
908 skip_bits1(gb); // reserved
910 v->s.h_edge_pos = v->s.avctx->coded_width;
911 v->s.v_edge_pos = v->s.avctx->coded_height;
913 av_log(v->s.avctx, AV_LOG_DEBUG,
914 "Advanced Profile level %i:\nfrmrtq_postproc=%i, bitrtq_postproc=%i\n"
915 "LoopFilter=%i, ChromaFormat=%i, Pulldown=%i, Interlace: %i\n"
916 "TFCTRflag=%i, FINTERPflag=%i\n",
917 v->level, v->frmrtq_postproc, v->bitrtq_postproc,
918 v->s.loop_filter, v->chromaformat, v->broadcast, v->interlace,
919 v->tfcntrflag, v->finterpflag
922 v->psf = get_bits1(gb);
923 if(v->psf) { //PsF, 6.1.13
924 av_log(v->s.avctx, AV_LOG_ERROR, "Progressive Segmented Frame mode: not supported (yet)\n");
927 v->s.max_b_frames = v->s.avctx->max_b_frames = 7;
928 if(get_bits1(gb)) { //Display Info - decoding is not affected by it
930 av_log(v->s.avctx, AV_LOG_DEBUG, "Display extended info:\n");
931 v->s.avctx->width = v->s.width = w = get_bits(gb, 14) + 1;
932 v->s.avctx->height = v->s.height = h = get_bits(gb, 14) + 1;
933 av_log(v->s.avctx, AV_LOG_DEBUG, "Display dimensions: %ix%i\n", w, h);
935 ar = get_bits(gb, 4);
937 v->s.avctx->sample_aspect_ratio = ff_vc1_pixel_aspect[ar];
941 v->s.avctx->sample_aspect_ratio = (AVRational){w, h};
944 if(get_bits1(gb)){ //framerate stuff
946 v->s.avctx->time_base.num = 32;
947 v->s.avctx->time_base.den = get_bits(gb, 16) + 1;
950 nr = get_bits(gb, 8);
951 dr = get_bits(gb, 4);
952 if(nr && nr < 8 && dr && dr < 3){
953 v->s.avctx->time_base.num = ff_vc1_fps_dr[dr - 1];
954 v->s.avctx->time_base.den = ff_vc1_fps_nr[nr - 1] * 1000;
960 v->color_prim = get_bits(gb, 8);
961 v->transfer_char = get_bits(gb, 8);
962 v->matrix_coef = get_bits(gb, 8);
966 v->hrd_param_flag = get_bits1(gb);
967 if(v->hrd_param_flag) {
969 v->hrd_num_leaky_buckets = get_bits(gb, 5);
970 skip_bits(gb, 4); //bitrate exponent
971 skip_bits(gb, 4); //buffer size exponent
972 for(i = 0; i < v->hrd_num_leaky_buckets; i++) {
973 skip_bits(gb, 16); //hrd_rate[n]
974 skip_bits(gb, 16); //hrd_buffer[n]
980 static int decode_entry_point(AVCodecContext *avctx, GetBitContext *gb)
982 VC1Context *v = avctx->priv_data;
983 int i, blink, clentry, refdist;
985 av_log(avctx, AV_LOG_DEBUG, "Entry point: %08X\n", show_bits_long(gb, 32));
986 blink = get_bits1(gb); // broken link
987 clentry = get_bits1(gb); // closed entry
988 v->panscanflag = get_bits1(gb);
989 refdist = get_bits1(gb); // refdist flag
990 v->s.loop_filter = get_bits1(gb);
991 v->fastuvmc = get_bits1(gb);
992 v->extended_mv = get_bits1(gb);
993 v->dquant = get_bits(gb, 2);
994 v->vstransform = get_bits1(gb);
995 v->overlap = get_bits1(gb);
996 v->quantizer_mode = get_bits(gb, 2);
998 if(v->hrd_param_flag){
999 for(i = 0; i < v->hrd_num_leaky_buckets; i++) {
1000 skip_bits(gb, 8); //hrd_full[n]
1005 avctx->coded_width = (get_bits(gb, 12)+1)<<1;
1006 avctx->coded_height = (get_bits(gb, 12)+1)<<1;
1009 v->extended_dmv = get_bits1(gb);
1011 av_log(avctx, AV_LOG_ERROR, "Luma scaling is not supported, expect wrong picture\n");
1012 skip_bits(gb, 3); // Y range, ignored for now
1015 av_log(avctx, AV_LOG_ERROR, "Chroma scaling is not supported, expect wrong picture\n");
1016 skip_bits(gb, 3); // UV range, ignored for now
1019 av_log(avctx, AV_LOG_DEBUG, "Entry point info:\n"
1020 "BrokenLink=%i, ClosedEntry=%i, PanscanFlag=%i\n"
1021 "RefDist=%i, Postproc=%i, FastUVMC=%i, ExtMV=%i\n"
1022 "DQuant=%i, VSTransform=%i, Overlap=%i, Qmode=%i\n",
1023 blink, clentry, v->panscanflag, refdist, v->s.loop_filter,
1024 v->fastuvmc, v->extended_mv, v->dquant, v->vstransform, v->overlap, v->quantizer_mode);
1029 static int vc1_parse_frame_header(VC1Context *v, GetBitContext* gb)
1031 int pqindex, lowquant, status;
1033 if(v->finterpflag) v->interpfrm = get_bits1(gb);
1034 skip_bits(gb, 2); //framecnt unused
1036 if (v->rangered) v->rangeredfrm = get_bits1(gb);
1037 v->s.pict_type = get_bits1(gb);
1038 if (v->s.avctx->max_b_frames) {
1039 if (!v->s.pict_type) {
1040 if (get_bits1(gb)) v->s.pict_type = I_TYPE;
1041 else v->s.pict_type = B_TYPE;
1042 } else v->s.pict_type = P_TYPE;
1043 } else v->s.pict_type = v->s.pict_type ? P_TYPE : I_TYPE;
1046 if(v->s.pict_type == B_TYPE) {
1047 v->bfraction = get_vlc2(gb, ff_vc1_bfraction_vlc.table, VC1_BFRACTION_VLC_BITS, 1);
1048 v->bfraction = ff_vc1_bfraction_lut[v->bfraction];
1049 if(v->bfraction == 0) {
1050 v->s.pict_type = BI_TYPE;
1053 if(v->s.pict_type == I_TYPE || v->s.pict_type == BI_TYPE)
1054 skip_bits(gb, 7); // skip buffer fullness
1057 if(v->s.pict_type == I_TYPE || v->s.pict_type == BI_TYPE)
1059 if(v->s.pict_type == P_TYPE)
1062 /* Quantizer stuff */
1063 pqindex = get_bits(gb, 5);
1064 if (v->quantizer_mode == QUANT_FRAME_IMPLICIT)
1065 v->pq = ff_vc1_pquant_table[0][pqindex];
1067 v->pq = ff_vc1_pquant_table[1][pqindex];
1070 if (v->quantizer_mode == QUANT_FRAME_IMPLICIT)
1071 v->pquantizer = pqindex < 9;
1072 if (v->quantizer_mode == QUANT_NON_UNIFORM)
1074 v->pqindex = pqindex;
1075 if (pqindex < 9) v->halfpq = get_bits1(gb);
1077 if (v->quantizer_mode == QUANT_FRAME_EXPLICIT)
1078 v->pquantizer = get_bits1(gb);
1080 if (v->extended_mv == 1) v->mvrange = get_unary(gb, 0, 3);
1081 v->k_x = v->mvrange + 9 + (v->mvrange >> 1); //k_x can be 9 10 12 13
1082 v->k_y = v->mvrange + 8; //k_y can be 8 9 10 11
1083 v->range_x = 1 << (v->k_x - 1);
1084 v->range_y = 1 << (v->k_y - 1);
1085 if (v->profile == PROFILE_ADVANCED)
1087 if (v->postprocflag) v->postproc = get_bits1(gb);
1090 if (v->multires && v->s.pict_type != B_TYPE) v->respic = get_bits(gb, 2);
1092 if(v->res_x8 && (v->s.pict_type == I_TYPE || v->s.pict_type == BI_TYPE)){
1093 v->x8_type = get_bits1(gb);
1094 }else v->x8_type = 0;
1095 //av_log(v->s.avctx, AV_LOG_INFO, "%c Frame: QP=[%i]%i (+%i/2) %i\n",
1096 // (v->s.pict_type == P_TYPE) ? 'P' : ((v->s.pict_type == I_TYPE) ? 'I' : 'B'), pqindex, v->pq, v->halfpq, v->rangeredfrm);
1098 if(v->s.pict_type == I_TYPE || v->s.pict_type == P_TYPE) v->use_ic = 0;
1100 switch(v->s.pict_type) {
1102 if (v->pq < 5) v->tt_index = 0;
1103 else if(v->pq < 13) v->tt_index = 1;
1104 else v->tt_index = 2;
1106 lowquant = (v->pq > 12) ? 0 : 1;
1107 v->mv_mode = ff_vc1_mv_pmode_table[lowquant][get_unary(gb, 1, 4)];
1108 if (v->mv_mode == MV_PMODE_INTENSITY_COMP)
1110 int scale, shift, i;
1111 v->mv_mode2 = ff_vc1_mv_pmode_table2[lowquant][get_unary(gb, 1, 3)];
1112 v->lumscale = get_bits(gb, 6);
1113 v->lumshift = get_bits(gb, 6);
1115 /* fill lookup tables for intensity compensation */
1118 shift = (255 - v->lumshift * 2) << 6;
1119 if(v->lumshift > 31)
1122 scale = v->lumscale + 32;
1123 if(v->lumshift > 31)
1124 shift = (v->lumshift - 64) << 6;
1126 shift = v->lumshift << 6;
1128 for(i = 0; i < 256; i++) {
1129 v->luty[i] = av_clip_uint8((scale * i + shift + 32) >> 6);
1130 v->lutuv[i] = av_clip_uint8((scale * (i - 128) + 128*64 + 32) >> 6);
1133 if(v->mv_mode == MV_PMODE_1MV_HPEL || v->mv_mode == MV_PMODE_1MV_HPEL_BILIN)
1134 v->s.quarter_sample = 0;
1135 else if(v->mv_mode == MV_PMODE_INTENSITY_COMP) {
1136 if(v->mv_mode2 == MV_PMODE_1MV_HPEL || v->mv_mode2 == MV_PMODE_1MV_HPEL_BILIN)
1137 v->s.quarter_sample = 0;
1139 v->s.quarter_sample = 1;
1141 v->s.quarter_sample = 1;
1142 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));
1144 if ((v->mv_mode == MV_PMODE_INTENSITY_COMP &&
1145 v->mv_mode2 == MV_PMODE_MIXED_MV)
1146 || v->mv_mode == MV_PMODE_MIXED_MV)
1148 status = bitplane_decoding(v->mv_type_mb_plane, &v->mv_type_is_raw, v);
1149 if (status < 0) return -1;
1150 av_log(v->s.avctx, AV_LOG_DEBUG, "MB MV Type plane encoding: "
1151 "Imode: %i, Invert: %i\n", status>>1, status&1);
1153 v->mv_type_is_raw = 0;
1154 memset(v->mv_type_mb_plane, 0, v->s.mb_stride * v->s.mb_height);
1156 status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);
1157 if (status < 0) return -1;
1158 av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: "
1159 "Imode: %i, Invert: %i\n", status>>1, status&1);
1161 /* Hopefully this is correct for P frames */
1162 v->s.mv_table_index = get_bits(gb, 2); //but using ff_vc1_ tables
1163 v->cbpcy_vlc = &ff_vc1_cbpcy_p_vlc[get_bits(gb, 2)];
1167 av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");
1168 vop_dquant_decoding(v);
1171 v->ttfrm = 0; //FIXME Is that so ?
1174 v->ttmbf = get_bits1(gb);
1177 v->ttfrm = ff_vc1_ttfrm_to_tt[get_bits(gb, 2)];
1185 if (v->pq < 5) v->tt_index = 0;
1186 else if(v->pq < 13) v->tt_index = 1;
1187 else v->tt_index = 2;
1189 lowquant = (v->pq > 12) ? 0 : 1;
1190 v->mv_mode = get_bits1(gb) ? MV_PMODE_1MV : MV_PMODE_1MV_HPEL_BILIN;
1191 v->s.quarter_sample = (v->mv_mode == MV_PMODE_1MV);
1192 v->s.mspel = v->s.quarter_sample;
1194 status = bitplane_decoding(v->direct_mb_plane, &v->dmb_is_raw, v);
1195 if (status < 0) return -1;
1196 av_log(v->s.avctx, AV_LOG_DEBUG, "MB Direct Type plane encoding: "
1197 "Imode: %i, Invert: %i\n", status>>1, status&1);
1198 status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);
1199 if (status < 0) return -1;
1200 av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: "
1201 "Imode: %i, Invert: %i\n", status>>1, status&1);
1203 v->s.mv_table_index = get_bits(gb, 2);
1204 v->cbpcy_vlc = &ff_vc1_cbpcy_p_vlc[get_bits(gb, 2)];
1208 av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");
1209 vop_dquant_decoding(v);
1215 v->ttmbf = get_bits1(gb);
1218 v->ttfrm = ff_vc1_ttfrm_to_tt[get_bits(gb, 2)];
1230 v->c_ac_table_index = decode012(gb);
1231 if (v->s.pict_type == I_TYPE || v->s.pict_type == BI_TYPE)
1233 v->y_ac_table_index = decode012(gb);
1236 v->s.dc_table_index = get_bits1(gb);
1239 if(v->s.pict_type == BI_TYPE) {
1240 v->s.pict_type = B_TYPE;
1246 static int vc1_parse_frame_header_adv(VC1Context *v, GetBitContext* gb)
1248 int pqindex, lowquant;
1251 v->p_frame_skipped = 0;
1254 v->fcm = decode012(gb);
1255 if(v->fcm) return -1; // interlaced frames/fields are not implemented
1257 switch(get_unary(gb, 0, 4)) {
1259 v->s.pict_type = P_TYPE;
1262 v->s.pict_type = B_TYPE;
1265 v->s.pict_type = I_TYPE;
1268 v->s.pict_type = BI_TYPE;
1271 v->s.pict_type = P_TYPE; // skipped pic
1272 v->p_frame_skipped = 1;
1278 if(!v->interlace || v->psf) {
1279 v->rptfrm = get_bits(gb, 2);
1281 v->tff = get_bits1(gb);
1282 v->rptfrm = get_bits1(gb);
1285 if(v->panscanflag) {
1288 v->rnd = get_bits1(gb);
1290 v->uvsamp = get_bits1(gb);
1291 if(v->finterpflag) v->interpfrm = get_bits1(gb);
1292 if(v->s.pict_type == B_TYPE) {
1293 v->bfraction = get_vlc2(gb, ff_vc1_bfraction_vlc.table, VC1_BFRACTION_VLC_BITS, 1);
1294 v->bfraction = ff_vc1_bfraction_lut[v->bfraction];
1295 if(v->bfraction == 0) {
1296 v->s.pict_type = BI_TYPE; /* XXX: should not happen here */
1299 pqindex = get_bits(gb, 5);
1300 v->pqindex = pqindex;
1301 if (v->quantizer_mode == QUANT_FRAME_IMPLICIT)
1302 v->pq = ff_vc1_pquant_table[0][pqindex];
1304 v->pq = ff_vc1_pquant_table[1][pqindex];
1307 if (v->quantizer_mode == QUANT_FRAME_IMPLICIT)
1308 v->pquantizer = pqindex < 9;
1309 if (v->quantizer_mode == QUANT_NON_UNIFORM)
1311 v->pqindex = pqindex;
1312 if (pqindex < 9) v->halfpq = get_bits1(gb);
1314 if (v->quantizer_mode == QUANT_FRAME_EXPLICIT)
1315 v->pquantizer = get_bits1(gb);
1317 if(v->s.pict_type == I_TYPE || v->s.pict_type == P_TYPE) v->use_ic = 0;
1319 switch(v->s.pict_type) {
1322 status = bitplane_decoding(v->acpred_plane, &v->acpred_is_raw, v);
1323 if (status < 0) return -1;
1324 av_log(v->s.avctx, AV_LOG_DEBUG, "ACPRED plane encoding: "
1325 "Imode: %i, Invert: %i\n", status>>1, status&1);
1326 v->condover = CONDOVER_NONE;
1327 if(v->overlap && v->pq <= 8) {
1328 v->condover = decode012(gb);
1329 if(v->condover == CONDOVER_SELECT) {
1330 status = bitplane_decoding(v->over_flags_plane, &v->overflg_is_raw, v);
1331 if (status < 0) return -1;
1332 av_log(v->s.avctx, AV_LOG_DEBUG, "CONDOVER plane encoding: "
1333 "Imode: %i, Invert: %i\n", status>>1, status&1);
1339 v->postproc = get_bits1(gb);
1340 if (v->extended_mv) v->mvrange = get_unary(gb, 0, 3);
1341 else v->mvrange = 0;
1342 v->k_x = v->mvrange + 9 + (v->mvrange >> 1); //k_x can be 9 10 12 13
1343 v->k_y = v->mvrange + 8; //k_y can be 8 9 10 11
1344 v->range_x = 1 << (v->k_x - 1);
1345 v->range_y = 1 << (v->k_y - 1);
1347 if (v->pq < 5) v->tt_index = 0;
1348 else if(v->pq < 13) v->tt_index = 1;
1349 else v->tt_index = 2;
1351 lowquant = (v->pq > 12) ? 0 : 1;
1352 v->mv_mode = ff_vc1_mv_pmode_table[lowquant][get_unary(gb, 1, 4)];
1353 if (v->mv_mode == MV_PMODE_INTENSITY_COMP)
1355 int scale, shift, i;
1356 v->mv_mode2 = ff_vc1_mv_pmode_table2[lowquant][get_unary(gb, 1, 3)];
1357 v->lumscale = get_bits(gb, 6);
1358 v->lumshift = get_bits(gb, 6);
1359 /* fill lookup tables for intensity compensation */
1362 shift = (255 - v->lumshift * 2) << 6;
1363 if(v->lumshift > 31)
1366 scale = v->lumscale + 32;
1367 if(v->lumshift > 31)
1368 shift = (v->lumshift - 64) << 6;
1370 shift = v->lumshift << 6;
1372 for(i = 0; i < 256; i++) {
1373 v->luty[i] = av_clip_uint8((scale * i + shift + 32) >> 6);
1374 v->lutuv[i] = av_clip_uint8((scale * (i - 128) + 128*64 + 32) >> 6);
1378 if(v->mv_mode == MV_PMODE_1MV_HPEL || v->mv_mode == MV_PMODE_1MV_HPEL_BILIN)
1379 v->s.quarter_sample = 0;
1380 else if(v->mv_mode == MV_PMODE_INTENSITY_COMP) {
1381 if(v->mv_mode2 == MV_PMODE_1MV_HPEL || v->mv_mode2 == MV_PMODE_1MV_HPEL_BILIN)
1382 v->s.quarter_sample = 0;
1384 v->s.quarter_sample = 1;
1386 v->s.quarter_sample = 1;
1387 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));
1389 if ((v->mv_mode == MV_PMODE_INTENSITY_COMP &&
1390 v->mv_mode2 == MV_PMODE_MIXED_MV)
1391 || v->mv_mode == MV_PMODE_MIXED_MV)
1393 status = bitplane_decoding(v->mv_type_mb_plane, &v->mv_type_is_raw, v);
1394 if (status < 0) return -1;
1395 av_log(v->s.avctx, AV_LOG_DEBUG, "MB MV Type plane encoding: "
1396 "Imode: %i, Invert: %i\n", status>>1, status&1);
1398 v->mv_type_is_raw = 0;
1399 memset(v->mv_type_mb_plane, 0, v->s.mb_stride * v->s.mb_height);
1401 status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);
1402 if (status < 0) return -1;
1403 av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: "
1404 "Imode: %i, Invert: %i\n", status>>1, status&1);
1406 /* Hopefully this is correct for P frames */
1407 v->s.mv_table_index = get_bits(gb, 2); //but using ff_vc1_ tables
1408 v->cbpcy_vlc = &ff_vc1_cbpcy_p_vlc[get_bits(gb, 2)];
1411 av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");
1412 vop_dquant_decoding(v);
1415 v->ttfrm = 0; //FIXME Is that so ?
1418 v->ttmbf = get_bits1(gb);
1421 v->ttfrm = ff_vc1_ttfrm_to_tt[get_bits(gb, 2)];
1430 v->postproc = get_bits1(gb);
1431 if (v->extended_mv) v->mvrange = get_unary(gb, 0, 3);
1432 else v->mvrange = 0;
1433 v->k_x = v->mvrange + 9 + (v->mvrange >> 1); //k_x can be 9 10 12 13
1434 v->k_y = v->mvrange + 8; //k_y can be 8 9 10 11
1435 v->range_x = 1 << (v->k_x - 1);
1436 v->range_y = 1 << (v->k_y - 1);
1438 if (v->pq < 5) v->tt_index = 0;
1439 else if(v->pq < 13) v->tt_index = 1;
1440 else v->tt_index = 2;
1442 lowquant = (v->pq > 12) ? 0 : 1;
1443 v->mv_mode = get_bits1(gb) ? MV_PMODE_1MV : MV_PMODE_1MV_HPEL_BILIN;
1444 v->s.quarter_sample = (v->mv_mode == MV_PMODE_1MV);
1445 v->s.mspel = v->s.quarter_sample;
1447 status = bitplane_decoding(v->direct_mb_plane, &v->dmb_is_raw, v);
1448 if (status < 0) return -1;
1449 av_log(v->s.avctx, AV_LOG_DEBUG, "MB Direct Type plane encoding: "
1450 "Imode: %i, Invert: %i\n", status>>1, status&1);
1451 status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);
1452 if (status < 0) return -1;
1453 av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: "
1454 "Imode: %i, Invert: %i\n", status>>1, status&1);
1456 v->s.mv_table_index = get_bits(gb, 2);
1457 v->cbpcy_vlc = &ff_vc1_cbpcy_p_vlc[get_bits(gb, 2)];
1461 av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");
1462 vop_dquant_decoding(v);
1468 v->ttmbf = get_bits1(gb);
1471 v->ttfrm = ff_vc1_ttfrm_to_tt[get_bits(gb, 2)];
1481 v->c_ac_table_index = decode012(gb);
1482 if (v->s.pict_type == I_TYPE || v->s.pict_type == BI_TYPE)
1484 v->y_ac_table_index = decode012(gb);
1487 v->s.dc_table_index = get_bits1(gb);
1488 if ((v->s.pict_type == I_TYPE || v->s.pict_type == BI_TYPE) && v->dquant) {
1489 av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");
1490 vop_dquant_decoding(v);
1494 if(v->s.pict_type == BI_TYPE) {
1495 v->s.pict_type = B_TYPE;
1501 /***********************************************************************/
1503 * @defgroup block VC-1 Block-level functions
1504 * @see 7.1.4, p91 and 8.1.1.7, p(1)04
1510 * @brief Get macroblock-level quantizer scale
1512 #define GET_MQUANT() \
1516 if (v->dqprofile == DQPROFILE_ALL_MBS) \
1520 mquant = (get_bits1(gb)) ? v->altpq : v->pq; \
1524 mqdiff = get_bits(gb, 3); \
1525 if (mqdiff != 7) mquant = v->pq + mqdiff; \
1526 else mquant = get_bits(gb, 5); \
1529 if(v->dqprofile == DQPROFILE_SINGLE_EDGE) \
1530 edges = 1 << v->dqsbedge; \
1531 else if(v->dqprofile == DQPROFILE_DOUBLE_EDGES) \
1532 edges = (3 << v->dqsbedge) % 15; \
1533 else if(v->dqprofile == DQPROFILE_FOUR_EDGES) \
1535 if((edges&1) && !s->mb_x) \
1536 mquant = v->altpq; \
1537 if((edges&2) && s->first_slice_line) \
1538 mquant = v->altpq; \
1539 if((edges&4) && s->mb_x == (s->mb_width - 1)) \
1540 mquant = v->altpq; \
1541 if((edges&8) && s->mb_y == (s->mb_height - 1)) \
1542 mquant = v->altpq; \
1546 * @def GET_MVDATA(_dmv_x, _dmv_y)
1547 * @brief Get MV differentials
1548 * @see MVDATA decoding from 8.3.5.2, p(1)20
1549 * @param _dmv_x Horizontal differential for decoded MV
1550 * @param _dmv_y Vertical differential for decoded MV
1552 #define GET_MVDATA(_dmv_x, _dmv_y) \
1553 index = 1 + get_vlc2(gb, ff_vc1_mv_diff_vlc[s->mv_table_index].table,\
1554 VC1_MV_DIFF_VLC_BITS, 2); \
1557 mb_has_coeffs = 1; \
1560 else mb_has_coeffs = 0; \
1562 if (!index) { _dmv_x = _dmv_y = 0; } \
1563 else if (index == 35) \
1565 _dmv_x = get_bits(gb, v->k_x - 1 + s->quarter_sample); \
1566 _dmv_y = get_bits(gb, v->k_y - 1 + s->quarter_sample); \
1568 else if (index == 36) \
1577 if (!s->quarter_sample && index1 == 5) val = 1; \
1579 if(size_table[index1] - val > 0) \
1580 val = get_bits(gb, size_table[index1] - val); \
1582 sign = 0 - (val&1); \
1583 _dmv_x = (sign ^ ((val>>1) + offset_table[index1])) - sign; \
1586 if (!s->quarter_sample && index1 == 5) val = 1; \
1588 if(size_table[index1] - val > 0) \
1589 val = get_bits(gb, size_table[index1] - val); \
1591 sign = 0 - (val&1); \
1592 _dmv_y = (sign ^ ((val>>1) + offset_table[index1])) - sign; \
1595 /** Predict and set motion vector
1597 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)
1599 int xy, wrap, off = 0;
1604 /* scale MV difference to be quad-pel */
1605 dmv_x <<= 1 - s->quarter_sample;
1606 dmv_y <<= 1 - s->quarter_sample;
1608 wrap = s->b8_stride;
1609 xy = s->block_index[n];
1612 s->mv[0][n][0] = s->current_picture.motion_val[0][xy][0] = 0;
1613 s->mv[0][n][1] = s->current_picture.motion_val[0][xy][1] = 0;
1614 s->current_picture.motion_val[1][xy][0] = 0;
1615 s->current_picture.motion_val[1][xy][1] = 0;
1616 if(mv1) { /* duplicate motion data for 1-MV block */
1617 s->current_picture.motion_val[0][xy + 1][0] = 0;
1618 s->current_picture.motion_val[0][xy + 1][1] = 0;
1619 s->current_picture.motion_val[0][xy + wrap][0] = 0;
1620 s->current_picture.motion_val[0][xy + wrap][1] = 0;
1621 s->current_picture.motion_val[0][xy + wrap + 1][0] = 0;
1622 s->current_picture.motion_val[0][xy + wrap + 1][1] = 0;
1623 s->current_picture.motion_val[1][xy + 1][0] = 0;
1624 s->current_picture.motion_val[1][xy + 1][1] = 0;
1625 s->current_picture.motion_val[1][xy + wrap][0] = 0;
1626 s->current_picture.motion_val[1][xy + wrap][1] = 0;
1627 s->current_picture.motion_val[1][xy + wrap + 1][0] = 0;
1628 s->current_picture.motion_val[1][xy + wrap + 1][1] = 0;
1633 C = s->current_picture.motion_val[0][xy - 1];
1634 A = s->current_picture.motion_val[0][xy - wrap];
1636 off = (s->mb_x == (s->mb_width - 1)) ? -1 : 2;
1638 //in 4-MV mode different blocks have different B predictor position
1641 off = (s->mb_x > 0) ? -1 : 1;
1644 off = (s->mb_x == (s->mb_width - 1)) ? -1 : 1;
1653 B = s->current_picture.motion_val[0][xy - wrap + off];
1655 if(!s->first_slice_line || (n==2 || n==3)) { // predictor A is not out of bounds
1656 if(s->mb_width == 1) {
1660 px = mid_pred(A[0], B[0], C[0]);
1661 py = mid_pred(A[1], B[1], C[1]);
1663 } else if(s->mb_x || (n==1 || n==3)) { // predictor C is not out of bounds
1669 /* Pullback MV as specified in 8.3.5.3.4 */
1672 qx = (s->mb_x << 6) + ((n==1 || n==3) ? 32 : 0);
1673 qy = (s->mb_y << 6) + ((n==2 || n==3) ? 32 : 0);
1674 X = (s->mb_width << 6) - 4;
1675 Y = (s->mb_height << 6) - 4;
1677 if(qx + px < -60) px = -60 - qx;
1678 if(qy + py < -60) py = -60 - qy;
1680 if(qx + px < -28) px = -28 - qx;
1681 if(qy + py < -28) py = -28 - qy;
1683 if(qx + px > X) px = X - qx;
1684 if(qy + py > Y) py = Y - qy;
1686 /* Calculate hybrid prediction as specified in 8.3.5.3.5 */
1687 if((!s->first_slice_line || (n==2 || n==3)) && (s->mb_x || (n==1 || n==3))) {
1688 if(is_intra[xy - wrap])
1689 sum = FFABS(px) + FFABS(py);
1691 sum = FFABS(px - A[0]) + FFABS(py - A[1]);
1693 if(get_bits1(&s->gb)) {
1701 if(is_intra[xy - 1])
1702 sum = FFABS(px) + FFABS(py);
1704 sum = FFABS(px - C[0]) + FFABS(py - C[1]);
1706 if(get_bits1(&s->gb)) {
1716 /* store MV using signed modulus of MV range defined in 4.11 */
1717 s->mv[0][n][0] = s->current_picture.motion_val[0][xy][0] = ((px + dmv_x + r_x) & ((r_x << 1) - 1)) - r_x;
1718 s->mv[0][n][1] = s->current_picture.motion_val[0][xy][1] = ((py + dmv_y + r_y) & ((r_y << 1) - 1)) - r_y;
1719 if(mv1) { /* duplicate motion data for 1-MV block */
1720 s->current_picture.motion_val[0][xy + 1][0] = s->current_picture.motion_val[0][xy][0];
1721 s->current_picture.motion_val[0][xy + 1][1] = s->current_picture.motion_val[0][xy][1];
1722 s->current_picture.motion_val[0][xy + wrap][0] = s->current_picture.motion_val[0][xy][0];
1723 s->current_picture.motion_val[0][xy + wrap][1] = s->current_picture.motion_val[0][xy][1];
1724 s->current_picture.motion_val[0][xy + wrap + 1][0] = s->current_picture.motion_val[0][xy][0];
1725 s->current_picture.motion_val[0][xy + wrap + 1][1] = s->current_picture.motion_val[0][xy][1];
1729 /** Motion compensation for direct or interpolated blocks in B-frames
1731 static void vc1_interp_mc(VC1Context *v)
1733 MpegEncContext *s = &v->s;
1734 DSPContext *dsp = &v->s.dsp;
1735 uint8_t *srcY, *srcU, *srcV;
1736 int dxy, uvdxy, mx, my, uvmx, uvmy, src_x, src_y, uvsrc_x, uvsrc_y;
1738 if(!v->s.next_picture.data[0])return;
1740 mx = s->mv[1][0][0];
1741 my = s->mv[1][0][1];
1742 uvmx = (mx + ((mx & 3) == 3)) >> 1;
1743 uvmy = (my + ((my & 3) == 3)) >> 1;
1745 uvmx = uvmx + ((uvmx<0)?-(uvmx&1):(uvmx&1));
1746 uvmy = uvmy + ((uvmy<0)?-(uvmy&1):(uvmy&1));
1748 srcY = s->next_picture.data[0];
1749 srcU = s->next_picture.data[1];
1750 srcV = s->next_picture.data[2];
1752 src_x = s->mb_x * 16 + (mx >> 2);
1753 src_y = s->mb_y * 16 + (my >> 2);
1754 uvsrc_x = s->mb_x * 8 + (uvmx >> 2);
1755 uvsrc_y = s->mb_y * 8 + (uvmy >> 2);
1757 if(v->profile != PROFILE_ADVANCED){
1758 src_x = av_clip( src_x, -16, s->mb_width * 16);
1759 src_y = av_clip( src_y, -16, s->mb_height * 16);
1760 uvsrc_x = av_clip(uvsrc_x, -8, s->mb_width * 8);
1761 uvsrc_y = av_clip(uvsrc_y, -8, s->mb_height * 8);
1763 src_x = av_clip( src_x, -17, s->avctx->coded_width);
1764 src_y = av_clip( src_y, -18, s->avctx->coded_height + 1);
1765 uvsrc_x = av_clip(uvsrc_x, -8, s->avctx->coded_width >> 1);
1766 uvsrc_y = av_clip(uvsrc_y, -8, s->avctx->coded_height >> 1);
1769 srcY += src_y * s->linesize + src_x;
1770 srcU += uvsrc_y * s->uvlinesize + uvsrc_x;
1771 srcV += uvsrc_y * s->uvlinesize + uvsrc_x;
1773 /* for grayscale we should not try to read from unknown area */
1774 if(s->flags & CODEC_FLAG_GRAY) {
1775 srcU = s->edge_emu_buffer + 18 * s->linesize;
1776 srcV = s->edge_emu_buffer + 18 * s->linesize;
1780 || (unsigned)src_x > s->h_edge_pos - (mx&3) - 16
1781 || (unsigned)src_y > s->v_edge_pos - (my&3) - 16){
1782 uint8_t *uvbuf= s->edge_emu_buffer + 19 * s->linesize;
1784 srcY -= s->mspel * (1 + s->linesize);
1785 ff_emulated_edge_mc(s->edge_emu_buffer, srcY, s->linesize, 17+s->mspel*2, 17+s->mspel*2,
1786 src_x - s->mspel, src_y - s->mspel, s->h_edge_pos, s->v_edge_pos);
1787 srcY = s->edge_emu_buffer;
1788 ff_emulated_edge_mc(uvbuf , srcU, s->uvlinesize, 8+1, 8+1,
1789 uvsrc_x, uvsrc_y, s->h_edge_pos >> 1, s->v_edge_pos >> 1);
1790 ff_emulated_edge_mc(uvbuf + 16, srcV, s->uvlinesize, 8+1, 8+1,
1791 uvsrc_x, uvsrc_y, s->h_edge_pos >> 1, s->v_edge_pos >> 1);
1794 /* if we deal with range reduction we need to scale source blocks */
1795 if(v->rangeredfrm) {
1797 uint8_t *src, *src2;
1800 for(j = 0; j < 17 + s->mspel*2; j++) {
1801 for(i = 0; i < 17 + s->mspel*2; i++) src[i] = ((src[i] - 128) >> 1) + 128;
1804 src = srcU; src2 = srcV;
1805 for(j = 0; j < 9; j++) {
1806 for(i = 0; i < 9; i++) {
1807 src[i] = ((src[i] - 128) >> 1) + 128;
1808 src2[i] = ((src2[i] - 128) >> 1) + 128;
1810 src += s->uvlinesize;
1811 src2 += s->uvlinesize;
1814 srcY += s->mspel * (1 + s->linesize);
1819 dxy = ((my & 1) << 1) | (mx & 1);
1821 dsp->avg_pixels_tab[0][dxy](s->dest[0], srcY, s->linesize, 16);
1823 if(s->flags & CODEC_FLAG_GRAY) return;
1824 /* Chroma MC always uses qpel blilinear */
1825 uvdxy = ((uvmy & 3) << 2) | (uvmx & 3);
1828 dsp->avg_h264_chroma_pixels_tab[0](s->dest[1], srcU, s->uvlinesize, 8, uvmx, uvmy);
1829 dsp->avg_h264_chroma_pixels_tab[0](s->dest[2], srcV, s->uvlinesize, 8, uvmx, uvmy);
1832 static av_always_inline int scale_mv(int value, int bfrac, int inv, int qs)
1836 #if B_FRACTION_DEN==256
1840 return 2 * ((value * n + 255) >> 9);
1841 return (value * n + 128) >> 8;
1844 n -= B_FRACTION_DEN;
1846 return 2 * ((value * n + B_FRACTION_DEN - 1) / (2 * B_FRACTION_DEN));
1847 return (value * n + B_FRACTION_DEN/2) / B_FRACTION_DEN;
1851 /** Reconstruct motion vector for B-frame and do motion compensation
1853 static inline void vc1_b_mc(VC1Context *v, int dmv_x[2], int dmv_y[2], int direct, int mode)
1856 v->mv_mode2 = v->mv_mode;
1857 v->mv_mode = MV_PMODE_INTENSITY_COMP;
1862 if(v->use_ic) v->mv_mode = v->mv_mode2;
1865 if(mode == BMV_TYPE_INTERPOLATED) {
1868 if(v->use_ic) v->mv_mode = v->mv_mode2;
1872 if(v->use_ic && (mode == BMV_TYPE_BACKWARD)) v->mv_mode = v->mv_mode2;
1873 vc1_mc_1mv(v, (mode == BMV_TYPE_BACKWARD));
1874 if(v->use_ic) v->mv_mode = v->mv_mode2;
1877 static inline void vc1_pred_b_mv(VC1Context *v, int dmv_x[2], int dmv_y[2], int direct, int mvtype)
1879 MpegEncContext *s = &v->s;
1880 int xy, wrap, off = 0;
1885 const uint8_t *is_intra = v->mb_type[0];
1889 /* scale MV difference to be quad-pel */
1890 dmv_x[0] <<= 1 - s->quarter_sample;
1891 dmv_y[0] <<= 1 - s->quarter_sample;
1892 dmv_x[1] <<= 1 - s->quarter_sample;
1893 dmv_y[1] <<= 1 - s->quarter_sample;
1895 wrap = s->b8_stride;
1896 xy = s->block_index[0];
1899 s->current_picture.motion_val[0][xy][0] =
1900 s->current_picture.motion_val[0][xy][1] =
1901 s->current_picture.motion_val[1][xy][0] =
1902 s->current_picture.motion_val[1][xy][1] = 0;
1905 s->mv[0][0][0] = scale_mv(s->next_picture.motion_val[1][xy][0], v->bfraction, 0, s->quarter_sample);
1906 s->mv[0][0][1] = scale_mv(s->next_picture.motion_val[1][xy][1], v->bfraction, 0, s->quarter_sample);
1907 s->mv[1][0][0] = scale_mv(s->next_picture.motion_val[1][xy][0], v->bfraction, 1, s->quarter_sample);
1908 s->mv[1][0][1] = scale_mv(s->next_picture.motion_val[1][xy][1], v->bfraction, 1, s->quarter_sample);
1910 /* Pullback predicted motion vectors as specified in 8.4.5.4 */
1911 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));
1912 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));
1913 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));
1914 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));
1916 s->current_picture.motion_val[0][xy][0] = s->mv[0][0][0];
1917 s->current_picture.motion_val[0][xy][1] = s->mv[0][0][1];
1918 s->current_picture.motion_val[1][xy][0] = s->mv[1][0][0];
1919 s->current_picture.motion_val[1][xy][1] = s->mv[1][0][1];
1923 if((mvtype == BMV_TYPE_FORWARD) || (mvtype == BMV_TYPE_INTERPOLATED)) {
1924 C = s->current_picture.motion_val[0][xy - 2];
1925 A = s->current_picture.motion_val[0][xy - wrap*2];
1926 off = (s->mb_x == (s->mb_width - 1)) ? -2 : 2;
1927 B = s->current_picture.motion_val[0][xy - wrap*2 + off];
1929 if(!s->mb_x) C[0] = C[1] = 0;
1930 if(!s->first_slice_line) { // predictor A is not out of bounds
1931 if(s->mb_width == 1) {
1935 px = mid_pred(A[0], B[0], C[0]);
1936 py = mid_pred(A[1], B[1], C[1]);
1938 } else if(s->mb_x) { // predictor C is not out of bounds
1944 /* Pullback MV as specified in 8.3.5.3.4 */
1947 if(v->profile < PROFILE_ADVANCED) {
1948 qx = (s->mb_x << 5);
1949 qy = (s->mb_y << 5);
1950 X = (s->mb_width << 5) - 4;
1951 Y = (s->mb_height << 5) - 4;
1952 if(qx + px < -28) px = -28 - qx;
1953 if(qy + py < -28) py = -28 - qy;
1954 if(qx + px > X) px = X - qx;
1955 if(qy + py > Y) py = Y - qy;
1957 qx = (s->mb_x << 6);
1958 qy = (s->mb_y << 6);
1959 X = (s->mb_width << 6) - 4;
1960 Y = (s->mb_height << 6) - 4;
1961 if(qx + px < -60) px = -60 - qx;
1962 if(qy + py < -60) py = -60 - qy;
1963 if(qx + px > X) px = X - qx;
1964 if(qy + py > Y) py = Y - qy;
1967 /* Calculate hybrid prediction as specified in 8.3.5.3.5 */
1968 if(0 && !s->first_slice_line && s->mb_x) {
1969 if(is_intra[xy - wrap])
1970 sum = FFABS(px) + FFABS(py);
1972 sum = FFABS(px - A[0]) + FFABS(py - A[1]);
1974 if(get_bits1(&s->gb)) {
1982 if(is_intra[xy - 2])
1983 sum = FFABS(px) + FFABS(py);
1985 sum = FFABS(px - C[0]) + FFABS(py - C[1]);
1987 if(get_bits1(&s->gb)) {
1997 /* store MV using signed modulus of MV range defined in 4.11 */
1998 s->mv[0][0][0] = ((px + dmv_x[0] + r_x) & ((r_x << 1) - 1)) - r_x;
1999 s->mv[0][0][1] = ((py + dmv_y[0] + r_y) & ((r_y << 1) - 1)) - r_y;
2001 if((mvtype == BMV_TYPE_BACKWARD) || (mvtype == BMV_TYPE_INTERPOLATED)) {
2002 C = s->current_picture.motion_val[1][xy - 2];
2003 A = s->current_picture.motion_val[1][xy - wrap*2];
2004 off = (s->mb_x == (s->mb_width - 1)) ? -2 : 2;
2005 B = s->current_picture.motion_val[1][xy - wrap*2 + off];
2007 if(!s->mb_x) C[0] = C[1] = 0;
2008 if(!s->first_slice_line) { // predictor A is not out of bounds
2009 if(s->mb_width == 1) {
2013 px = mid_pred(A[0], B[0], C[0]);
2014 py = mid_pred(A[1], B[1], C[1]);
2016 } else if(s->mb_x) { // predictor C is not out of bounds
2022 /* Pullback MV as specified in 8.3.5.3.4 */
2025 if(v->profile < PROFILE_ADVANCED) {
2026 qx = (s->mb_x << 5);
2027 qy = (s->mb_y << 5);
2028 X = (s->mb_width << 5) - 4;
2029 Y = (s->mb_height << 5) - 4;
2030 if(qx + px < -28) px = -28 - qx;
2031 if(qy + py < -28) py = -28 - qy;
2032 if(qx + px > X) px = X - qx;
2033 if(qy + py > Y) py = Y - qy;
2035 qx = (s->mb_x << 6);
2036 qy = (s->mb_y << 6);
2037 X = (s->mb_width << 6) - 4;
2038 Y = (s->mb_height << 6) - 4;
2039 if(qx + px < -60) px = -60 - qx;
2040 if(qy + py < -60) py = -60 - qy;
2041 if(qx + px > X) px = X - qx;
2042 if(qy + py > Y) py = Y - qy;
2045 /* Calculate hybrid prediction as specified in 8.3.5.3.5 */
2046 if(0 && !s->first_slice_line && s->mb_x) {
2047 if(is_intra[xy - wrap])
2048 sum = FFABS(px) + FFABS(py);
2050 sum = FFABS(px - A[0]) + FFABS(py - A[1]);
2052 if(get_bits1(&s->gb)) {
2060 if(is_intra[xy - 2])
2061 sum = FFABS(px) + FFABS(py);
2063 sum = FFABS(px - C[0]) + FFABS(py - C[1]);
2065 if(get_bits1(&s->gb)) {
2075 /* store MV using signed modulus of MV range defined in 4.11 */
2077 s->mv[1][0][0] = ((px + dmv_x[1] + r_x) & ((r_x << 1) - 1)) - r_x;
2078 s->mv[1][0][1] = ((py + dmv_y[1] + r_y) & ((r_y << 1) - 1)) - r_y;
2080 s->current_picture.motion_val[0][xy][0] = s->mv[0][0][0];
2081 s->current_picture.motion_val[0][xy][1] = s->mv[0][0][1];
2082 s->current_picture.motion_val[1][xy][0] = s->mv[1][0][0];
2083 s->current_picture.motion_val[1][xy][1] = s->mv[1][0][1];
2086 /** Get predicted DC value for I-frames only
2087 * prediction dir: left=0, top=1
2088 * @param s MpegEncContext
2089 * @param[in] n block index in the current MB
2090 * @param dc_val_ptr Pointer to DC predictor
2091 * @param dir_ptr Prediction direction for use in AC prediction
2093 static inline int vc1_i_pred_dc(MpegEncContext *s, int overlap, int pq, int n,
2094 int16_t **dc_val_ptr, int *dir_ptr)
2096 int a, b, c, wrap, pred, scale;
2098 static const uint16_t dcpred[32] = {
2099 -1, 1024, 512, 341, 256, 205, 171, 146, 128,
2100 114, 102, 93, 85, 79, 73, 68, 64,
2101 60, 57, 54, 51, 49, 47, 45, 43,
2102 41, 39, 38, 37, 35, 34, 33
2105 /* find prediction - wmv3_dc_scale always used here in fact */
2106 if (n < 4) scale = s->y_dc_scale;
2107 else scale = s->c_dc_scale;
2109 wrap = s->block_wrap[n];
2110 dc_val= s->dc_val[0] + s->block_index[n];
2116 b = dc_val[ - 1 - wrap];
2117 a = dc_val[ - wrap];
2119 if (pq < 9 || !overlap)
2121 /* Set outer values */
2122 if (s->first_slice_line && (n!=2 && n!=3)) b=a=dcpred[scale];
2123 if (s->mb_x == 0 && (n!=1 && n!=3)) b=c=dcpred[scale];
2127 /* Set outer values */
2128 if (s->first_slice_line && (n!=2 && n!=3)) b=a=0;
2129 if (s->mb_x == 0 && (n!=1 && n!=3)) b=c=0;
2132 if (abs(a - b) <= abs(b - c)) {
2140 /* update predictor */
2141 *dc_val_ptr = &dc_val[0];
2146 /** Get predicted DC value
2147 * prediction dir: left=0, top=1
2148 * @param s MpegEncContext
2149 * @param[in] n block index in the current MB
2150 * @param dc_val_ptr Pointer to DC predictor
2151 * @param dir_ptr Prediction direction for use in AC prediction
2153 static inline int vc1_pred_dc(MpegEncContext *s, int overlap, int pq, int n,
2154 int a_avail, int c_avail,
2155 int16_t **dc_val_ptr, int *dir_ptr)
2157 int a, b, c, wrap, pred, scale;
2159 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
2162 /* find prediction - wmv3_dc_scale always used here in fact */
2163 if (n < 4) scale = s->y_dc_scale;
2164 else scale = s->c_dc_scale;
2166 wrap = s->block_wrap[n];
2167 dc_val= s->dc_val[0] + s->block_index[n];
2173 b = dc_val[ - 1 - wrap];
2174 a = dc_val[ - wrap];
2175 /* scale predictors if needed */
2176 q1 = s->current_picture.qscale_table[mb_pos];
2177 if(c_avail && (n!= 1 && n!=3)) {
2178 q2 = s->current_picture.qscale_table[mb_pos - 1];
2180 c = (c * s->y_dc_scale_table[q2] * ff_vc1_dqscale[s->y_dc_scale_table[q1] - 1] + 0x20000) >> 18;
2182 if(a_avail && (n!= 2 && n!=3)) {
2183 q2 = s->current_picture.qscale_table[mb_pos - s->mb_stride];
2185 a = (a * s->y_dc_scale_table[q2] * ff_vc1_dqscale[s->y_dc_scale_table[q1] - 1] + 0x20000) >> 18;
2187 if(a_avail && c_avail && (n!=3)) {
2190 if(n != 2) off -= s->mb_stride;
2191 q2 = s->current_picture.qscale_table[off];
2193 b = (b * s->y_dc_scale_table[q2] * ff_vc1_dqscale[s->y_dc_scale_table[q1] - 1] + 0x20000) >> 18;
2196 if(a_avail && c_avail) {
2197 if(abs(a - b) <= abs(b - c)) {
2204 } else if(a_avail) {
2207 } else if(c_avail) {
2215 /* update predictor */
2216 *dc_val_ptr = &dc_val[0];
2222 * @defgroup std_mb VC1 Macroblock-level functions in Simple/Main Profiles
2223 * @see 7.1.4, p91 and 8.1.1.7, p(1)04
2227 static inline int vc1_coded_block_pred(MpegEncContext * s, int n, uint8_t **coded_block_ptr)
2229 int xy, wrap, pred, a, b, c;
2231 xy = s->block_index[n];
2232 wrap = s->b8_stride;
2237 a = s->coded_block[xy - 1 ];
2238 b = s->coded_block[xy - 1 - wrap];
2239 c = s->coded_block[xy - wrap];
2248 *coded_block_ptr = &s->coded_block[xy];
2254 * Decode one AC coefficient
2255 * @param v The VC1 context
2256 * @param last Last coefficient
2257 * @param skip How much zero coefficients to skip
2258 * @param value Decoded AC coefficient value
2261 static void vc1_decode_ac_coeff(VC1Context *v, int *last, int *skip, int *value, int codingset)
2263 GetBitContext *gb = &v->s.gb;
2264 int index, escape, run = 0, level = 0, lst = 0;
2266 index = get_vlc2(gb, ff_vc1_ac_coeff_table[codingset].table, AC_VLC_BITS, 3);
2267 if (index != vc1_ac_sizes[codingset] - 1) {
2268 run = vc1_index_decode_table[codingset][index][0];
2269 level = vc1_index_decode_table[codingset][index][1];
2270 lst = index >= vc1_last_decode_table[codingset];
2274 escape = decode210(gb);
2276 index = get_vlc2(gb, ff_vc1_ac_coeff_table[codingset].table, AC_VLC_BITS, 3);
2277 run = vc1_index_decode_table[codingset][index][0];
2278 level = vc1_index_decode_table[codingset][index][1];
2279 lst = index >= vc1_last_decode_table[codingset];
2282 level += vc1_last_delta_level_table[codingset][run];
2284 level += vc1_delta_level_table[codingset][run];
2287 run += vc1_last_delta_run_table[codingset][level] + 1;
2289 run += vc1_delta_run_table[codingset][level] + 1;
2295 lst = get_bits1(gb);
2296 if(v->s.esc3_level_length == 0) {
2297 if(v->pq < 8 || v->dquantfrm) { // table 59
2298 v->s.esc3_level_length = get_bits(gb, 3);
2299 if(!v->s.esc3_level_length)
2300 v->s.esc3_level_length = get_bits(gb, 2) + 8;
2302 v->s.esc3_level_length = get_unary(gb, 1, 6) + 2;
2304 v->s.esc3_run_length = 3 + get_bits(gb, 2);
2306 run = get_bits(gb, v->s.esc3_run_length);
2307 sign = get_bits1(gb);
2308 level = get_bits(gb, v->s.esc3_level_length);
2319 /** Decode intra block in intra frames - should be faster than decode_intra_block
2320 * @param v VC1Context
2321 * @param block block to decode
2322 * @param coded are AC coeffs present or not
2323 * @param codingset set of VLC to decode data
2325 static int vc1_decode_i_block(VC1Context *v, DCTELEM block[64], int n, int coded, int codingset)
2327 GetBitContext *gb = &v->s.gb;
2328 MpegEncContext *s = &v->s;
2329 int dc_pred_dir = 0; /* Direction of the DC prediction used */
2332 int16_t *ac_val, *ac_val2;
2335 /* Get DC differential */
2337 dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_luma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);
2339 dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_chroma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);
2342 av_log(s->avctx, AV_LOG_ERROR, "Illegal DC VLC\n");
2347 if (dcdiff == 119 /* ESC index value */)
2349 /* TODO: Optimize */
2350 if (v->pq == 1) dcdiff = get_bits(gb, 10);
2351 else if (v->pq == 2) dcdiff = get_bits(gb, 9);
2352 else dcdiff = get_bits(gb, 8);
2357 dcdiff = (dcdiff<<2) + get_bits(gb, 2) - 3;
2358 else if (v->pq == 2)
2359 dcdiff = (dcdiff<<1) + get_bits1(gb) - 1;
2366 dcdiff += vc1_i_pred_dc(&v->s, v->overlap, v->pq, n, &dc_val, &dc_pred_dir);
2369 /* Store the quantized DC coeff, used for prediction */
2371 block[0] = dcdiff * s->y_dc_scale;
2373 block[0] = dcdiff * s->c_dc_scale;
2386 int last = 0, skip, value;
2387 const int8_t *zz_table;
2391 scale = v->pq * 2 + v->halfpq;
2395 zz_table = ff_vc1_horizontal_zz;
2397 zz_table = ff_vc1_vertical_zz;
2399 zz_table = ff_vc1_normal_zz;
2401 ac_val = s->ac_val[0][0] + s->block_index[n] * 16;
2403 if(dc_pred_dir) //left
2406 ac_val -= 16 * s->block_wrap[n];
2409 vc1_decode_ac_coeff(v, &last, &skip, &value, codingset);
2413 block[zz_table[i++]] = value;
2416 /* apply AC prediction if needed */
2418 if(dc_pred_dir) { //left
2419 for(k = 1; k < 8; k++)
2420 block[k << 3] += ac_val[k];
2422 for(k = 1; k < 8; k++)
2423 block[k] += ac_val[k + 8];
2426 /* save AC coeffs for further prediction */
2427 for(k = 1; k < 8; k++) {
2428 ac_val2[k] = block[k << 3];
2429 ac_val2[k + 8] = block[k];
2432 /* scale AC coeffs */
2433 for(k = 1; k < 64; k++)
2437 block[k] += (block[k] < 0) ? -v->pq : v->pq;
2440 if(s->ac_pred) i = 63;
2446 ac_val = s->ac_val[0][0] + s->block_index[n] * 16;
2449 scale = v->pq * 2 + v->halfpq;
2450 memset(ac_val2, 0, 16 * 2);
2451 if(dc_pred_dir) {//left
2454 memcpy(ac_val2, ac_val, 8 * 2);
2456 ac_val -= 16 * s->block_wrap[n];
2458 memcpy(ac_val2 + 8, ac_val + 8, 8 * 2);
2461 /* apply AC prediction if needed */
2463 if(dc_pred_dir) { //left
2464 for(k = 1; k < 8; k++) {
2465 block[k << 3] = ac_val[k] * scale;
2466 if(!v->pquantizer && block[k << 3])
2467 block[k << 3] += (block[k << 3] < 0) ? -v->pq : v->pq;
2470 for(k = 1; k < 8; k++) {
2471 block[k] = ac_val[k + 8] * scale;
2472 if(!v->pquantizer && block[k])
2473 block[k] += (block[k] < 0) ? -v->pq : v->pq;
2479 s->block_last_index[n] = i;
2484 /** Decode intra block in intra frames - should be faster than decode_intra_block
2485 * @param v VC1Context
2486 * @param block block to decode
2487 * @param coded are AC coeffs present or not
2488 * @param codingset set of VLC to decode data
2490 static int vc1_decode_i_block_adv(VC1Context *v, DCTELEM block[64], int n, int coded, int codingset, int mquant)
2492 GetBitContext *gb = &v->s.gb;
2493 MpegEncContext *s = &v->s;
2494 int dc_pred_dir = 0; /* Direction of the DC prediction used */
2497 int16_t *ac_val, *ac_val2;
2499 int a_avail = v->a_avail, c_avail = v->c_avail;
2500 int use_pred = s->ac_pred;
2503 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
2505 /* Get DC differential */
2507 dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_luma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);
2509 dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_chroma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);
2512 av_log(s->avctx, AV_LOG_ERROR, "Illegal DC VLC\n");
2517 if (dcdiff == 119 /* ESC index value */)
2519 /* TODO: Optimize */
2520 if (mquant == 1) dcdiff = get_bits(gb, 10);
2521 else if (mquant == 2) dcdiff = get_bits(gb, 9);
2522 else dcdiff = get_bits(gb, 8);
2527 dcdiff = (dcdiff<<2) + get_bits(gb, 2) - 3;
2528 else if (mquant == 2)
2529 dcdiff = (dcdiff<<1) + get_bits1(gb) - 1;
2536 dcdiff += vc1_pred_dc(&v->s, v->overlap, mquant, n, v->a_avail, v->c_avail, &dc_val, &dc_pred_dir);
2539 /* Store the quantized DC coeff, used for prediction */
2541 block[0] = dcdiff * s->y_dc_scale;
2543 block[0] = dcdiff * s->c_dc_scale;
2552 /* check if AC is needed at all */
2553 if(!a_avail && !c_avail) use_pred = 0;
2554 ac_val = s->ac_val[0][0] + s->block_index[n] * 16;
2557 scale = mquant * 2 + ((mquant == v->pq) ? v->halfpq : 0);
2559 if(dc_pred_dir) //left
2562 ac_val -= 16 * s->block_wrap[n];
2564 q1 = s->current_picture.qscale_table[mb_pos];
2565 if(dc_pred_dir && c_avail && mb_pos) q2 = s->current_picture.qscale_table[mb_pos - 1];
2566 if(!dc_pred_dir && a_avail && mb_pos >= s->mb_stride) q2 = s->current_picture.qscale_table[mb_pos - s->mb_stride];
2567 if(dc_pred_dir && n==1) q2 = q1;
2568 if(!dc_pred_dir && n==2) q2 = q1;
2572 int last = 0, skip, value;
2573 const int8_t *zz_table;
2578 zz_table = ff_vc1_horizontal_zz;
2580 zz_table = ff_vc1_vertical_zz;
2582 zz_table = ff_vc1_normal_zz;
2585 vc1_decode_ac_coeff(v, &last, &skip, &value, codingset);
2589 block[zz_table[i++]] = value;
2592 /* apply AC prediction if needed */
2594 /* scale predictors if needed*/
2596 q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;
2597 q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;
2599 if(dc_pred_dir) { //left
2600 for(k = 1; k < 8; k++)
2601 block[k << 3] += (ac_val[k] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;
2603 for(k = 1; k < 8; k++)
2604 block[k] += (ac_val[k + 8] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;
2607 if(dc_pred_dir) { //left
2608 for(k = 1; k < 8; k++)
2609 block[k << 3] += ac_val[k];
2611 for(k = 1; k < 8; k++)
2612 block[k] += ac_val[k + 8];
2616 /* save AC coeffs for further prediction */
2617 for(k = 1; k < 8; k++) {
2618 ac_val2[k] = block[k << 3];
2619 ac_val2[k + 8] = block[k];
2622 /* scale AC coeffs */
2623 for(k = 1; k < 64; k++)
2627 block[k] += (block[k] < 0) ? -mquant : mquant;
2630 if(use_pred) i = 63;
2631 } else { // no AC coeffs
2634 memset(ac_val2, 0, 16 * 2);
2635 if(dc_pred_dir) {//left
2637 memcpy(ac_val2, ac_val, 8 * 2);
2639 q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;
2640 q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;
2641 for(k = 1; k < 8; k++)
2642 ac_val2[k] = (ac_val2[k] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;
2647 memcpy(ac_val2 + 8, ac_val + 8, 8 * 2);
2649 q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;
2650 q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;
2651 for(k = 1; k < 8; k++)
2652 ac_val2[k + 8] = (ac_val2[k + 8] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;
2657 /* apply AC prediction if needed */
2659 if(dc_pred_dir) { //left
2660 for(k = 1; k < 8; k++) {
2661 block[k << 3] = ac_val2[k] * scale;
2662 if(!v->pquantizer && block[k << 3])
2663 block[k << 3] += (block[k << 3] < 0) ? -mquant : mquant;
2666 for(k = 1; k < 8; k++) {
2667 block[k] = ac_val2[k + 8] * scale;
2668 if(!v->pquantizer && block[k])
2669 block[k] += (block[k] < 0) ? -mquant : mquant;
2675 s->block_last_index[n] = i;
2680 /** Decode intra block in inter frames - more generic version than vc1_decode_i_block
2681 * @param v VC1Context
2682 * @param block block to decode
2683 * @param coded are AC coeffs present or not
2684 * @param mquant block quantizer
2685 * @param codingset set of VLC to decode data
2687 static int vc1_decode_intra_block(VC1Context *v, DCTELEM block[64], int n, int coded, int mquant, int codingset)
2689 GetBitContext *gb = &v->s.gb;
2690 MpegEncContext *s = &v->s;
2691 int dc_pred_dir = 0; /* Direction of the DC prediction used */
2694 int16_t *ac_val, *ac_val2;
2696 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
2697 int a_avail = v->a_avail, c_avail = v->c_avail;
2698 int use_pred = s->ac_pred;
2702 /* XXX: Guard against dumb values of mquant */
2703 mquant = (mquant < 1) ? 0 : ( (mquant>31) ? 31 : mquant );
2705 /* Set DC scale - y and c use the same */
2706 s->y_dc_scale = s->y_dc_scale_table[mquant];
2707 s->c_dc_scale = s->c_dc_scale_table[mquant];
2709 /* Get DC differential */
2711 dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_luma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);
2713 dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_chroma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);
2716 av_log(s->avctx, AV_LOG_ERROR, "Illegal DC VLC\n");
2721 if (dcdiff == 119 /* ESC index value */)
2723 /* TODO: Optimize */
2724 if (mquant == 1) dcdiff = get_bits(gb, 10);
2725 else if (mquant == 2) dcdiff = get_bits(gb, 9);
2726 else dcdiff = get_bits(gb, 8);
2731 dcdiff = (dcdiff<<2) + get_bits(gb, 2) - 3;
2732 else if (mquant == 2)
2733 dcdiff = (dcdiff<<1) + get_bits1(gb) - 1;
2740 dcdiff += vc1_pred_dc(&v->s, v->overlap, mquant, n, a_avail, c_avail, &dc_val, &dc_pred_dir);
2743 /* Store the quantized DC coeff, used for prediction */
2746 block[0] = dcdiff * s->y_dc_scale;
2748 block[0] = dcdiff * s->c_dc_scale;
2757 /* check if AC is needed at all and adjust direction if needed */
2758 if(!a_avail) dc_pred_dir = 1;
2759 if(!c_avail) dc_pred_dir = 0;
2760 if(!a_avail && !c_avail) use_pred = 0;
2761 ac_val = s->ac_val[0][0] + s->block_index[n] * 16;
2764 scale = mquant * 2 + v->halfpq;
2766 if(dc_pred_dir) //left
2769 ac_val -= 16 * s->block_wrap[n];
2771 q1 = s->current_picture.qscale_table[mb_pos];
2772 if(dc_pred_dir && c_avail && mb_pos) q2 = s->current_picture.qscale_table[mb_pos - 1];
2773 if(!dc_pred_dir && a_avail && mb_pos >= s->mb_stride) q2 = s->current_picture.qscale_table[mb_pos - s->mb_stride];
2774 if(dc_pred_dir && n==1) q2 = q1;
2775 if(!dc_pred_dir && n==2) q2 = q1;
2779 int last = 0, skip, value;
2780 const int8_t *zz_table;
2783 zz_table = ff_vc1_simple_progressive_8x8_zz;
2786 vc1_decode_ac_coeff(v, &last, &skip, &value, codingset);
2790 block[zz_table[i++]] = value;
2793 /* apply AC prediction if needed */
2795 /* scale predictors if needed*/
2797 q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;
2798 q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;
2800 if(dc_pred_dir) { //left
2801 for(k = 1; k < 8; k++)
2802 block[k << 3] += (ac_val[k] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;
2804 for(k = 1; k < 8; k++)
2805 block[k] += (ac_val[k + 8] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;
2808 if(dc_pred_dir) { //left
2809 for(k = 1; k < 8; k++)
2810 block[k << 3] += ac_val[k];
2812 for(k = 1; k < 8; k++)
2813 block[k] += ac_val[k + 8];
2817 /* save AC coeffs for further prediction */
2818 for(k = 1; k < 8; k++) {
2819 ac_val2[k] = block[k << 3];
2820 ac_val2[k + 8] = block[k];
2823 /* scale AC coeffs */
2824 for(k = 1; k < 64; k++)
2828 block[k] += (block[k] < 0) ? -mquant : mquant;
2831 if(use_pred) i = 63;
2832 } else { // no AC coeffs
2835 memset(ac_val2, 0, 16 * 2);
2836 if(dc_pred_dir) {//left
2838 memcpy(ac_val2, ac_val, 8 * 2);
2840 q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;
2841 q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;
2842 for(k = 1; k < 8; k++)
2843 ac_val2[k] = (ac_val2[k] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;
2848 memcpy(ac_val2 + 8, ac_val + 8, 8 * 2);
2850 q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;
2851 q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;
2852 for(k = 1; k < 8; k++)
2853 ac_val2[k + 8] = (ac_val2[k + 8] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;
2858 /* apply AC prediction if needed */
2860 if(dc_pred_dir) { //left
2861 for(k = 1; k < 8; k++) {
2862 block[k << 3] = ac_val2[k] * scale;
2863 if(!v->pquantizer && block[k << 3])
2864 block[k << 3] += (block[k << 3] < 0) ? -mquant : mquant;
2867 for(k = 1; k < 8; k++) {
2868 block[k] = ac_val2[k + 8] * scale;
2869 if(!v->pquantizer && block[k])
2870 block[k] += (block[k] < 0) ? -mquant : mquant;
2876 s->block_last_index[n] = i;
2883 static int vc1_decode_p_block(VC1Context *v, DCTELEM block[64], int n, int mquant, int ttmb, int first_block,
2884 uint8_t *dst, int linesize, int skip_block)
2886 MpegEncContext *s = &v->s;
2887 GetBitContext *gb = &s->gb;
2890 int scale, off, idx, last, skip, value;
2891 int ttblk = ttmb & 7;
2894 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)];
2896 if(ttblk == TT_4X4) {
2897 subblkpat = ~(get_vlc2(gb, ff_vc1_subblkpat_vlc[v->tt_index].table, VC1_SUBBLKPAT_VLC_BITS, 1) + 1);
2899 if((ttblk != TT_8X8 && ttblk != TT_4X4) && (v->ttmbf || (ttmb != -1 && (ttmb & 8) && !first_block))) {
2900 subblkpat = decode012(gb);
2901 if(subblkpat) subblkpat ^= 3; //swap decoded pattern bits
2902 if(ttblk == TT_8X4_TOP || ttblk == TT_8X4_BOTTOM) ttblk = TT_8X4;
2903 if(ttblk == TT_4X8_RIGHT || ttblk == TT_4X8_LEFT) ttblk = TT_4X8;
2905 scale = 2 * mquant + ((v->pq == mquant) ? v->halfpq : 0);
2907 // convert transforms like 8X4_TOP to generic TT and SUBBLKPAT
2908 if(ttblk == TT_8X4_TOP || ttblk == TT_8X4_BOTTOM) {
2909 subblkpat = 2 - (ttblk == TT_8X4_TOP);
2912 if(ttblk == TT_4X8_RIGHT || ttblk == TT_4X8_LEFT) {
2913 subblkpat = 2 - (ttblk == TT_4X8_LEFT);
2921 vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);
2925 idx = ff_vc1_simple_progressive_8x8_zz[i++];
2926 block[idx] = value * scale;
2928 block[idx] += (block[idx] < 0) ? -mquant : mquant;
2931 s->dsp.vc1_inv_trans_8x8(block);
2932 s->dsp.add_pixels_clamped(block, dst, linesize);
2936 for(j = 0; j < 4; j++) {
2937 last = subblkpat & (1 << (3 - j));
2939 off = (j & 1) * 4 + (j & 2) * 16;
2941 vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);
2945 idx = ff_vc1_simple_progressive_4x4_zz[i++];
2946 block[idx + off] = value * scale;
2948 block[idx + off] += (block[idx + off] < 0) ? -mquant : mquant;
2950 if(!(subblkpat & (1 << (3 - j))) && !skip_block)
2951 s->dsp.vc1_inv_trans_4x4(dst + (j&1)*4 + (j&2)*2*linesize, linesize, block + off);
2955 for(j = 0; j < 2; j++) {
2956 last = subblkpat & (1 << (1 - j));
2960 vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);
2964 if(v->profile < PROFILE_ADVANCED)
2965 idx = ff_vc1_simple_progressive_8x4_zz[i++];
2967 idx = ff_vc1_adv_progressive_8x4_zz[i++];
2968 block[idx + off] = value * scale;
2970 block[idx + off] += (block[idx + off] < 0) ? -mquant : mquant;
2972 if(!(subblkpat & (1 << (1 - j))) && !skip_block)
2973 s->dsp.vc1_inv_trans_8x4(dst + j*4*linesize, linesize, block + off);
2977 for(j = 0; j < 2; j++) {
2978 last = subblkpat & (1 << (1 - j));
2982 vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);
2986 if(v->profile < PROFILE_ADVANCED)
2987 idx = ff_vc1_simple_progressive_4x8_zz[i++];
2989 idx = ff_vc1_adv_progressive_4x8_zz[i++];
2990 block[idx + off] = value * scale;
2992 block[idx + off] += (block[idx + off] < 0) ? -mquant : mquant;
2994 if(!(subblkpat & (1 << (1 - j))) && !skip_block)
2995 s->dsp.vc1_inv_trans_4x8(dst + j*4, linesize, block + off);
3003 /** Decode one P-frame MB (in Simple/Main profile)
3005 static int vc1_decode_p_mb(VC1Context *v)
3007 MpegEncContext *s = &v->s;
3008 GetBitContext *gb = &s->gb;
3010 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
3011 int cbp; /* cbp decoding stuff */
3012 int mqdiff, mquant; /* MB quantization */
3013 int ttmb = v->ttfrm; /* MB Transform type */
3016 static const int size_table[6] = { 0, 2, 3, 4, 5, 8 },
3017 offset_table[6] = { 0, 1, 3, 7, 15, 31 };
3018 int mb_has_coeffs = 1; /* last_flag */
3019 int dmv_x, dmv_y; /* Differential MV components */
3020 int index, index1; /* LUT indices */
3021 int val, sign; /* temp values */
3022 int first_block = 1;
3024 int skipped, fourmv;
3026 mquant = v->pq; /* Loosy initialization */
3028 if (v->mv_type_is_raw)
3029 fourmv = get_bits1(gb);
3031 fourmv = v->mv_type_mb_plane[mb_pos];
3033 skipped = get_bits1(gb);
3035 skipped = v->s.mbskip_table[mb_pos];
3037 s->dsp.clear_blocks(s->block[0]);
3039 if (!fourmv) /* 1MV mode */
3043 GET_MVDATA(dmv_x, dmv_y);
3046 s->current_picture.motion_val[1][s->block_index[0]][0] = 0;
3047 s->current_picture.motion_val[1][s->block_index[0]][1] = 0;
3049 s->current_picture.mb_type[mb_pos] = s->mb_intra ? MB_TYPE_INTRA : MB_TYPE_16x16;
3050 vc1_pred_mv(s, 0, dmv_x, dmv_y, 1, v->range_x, v->range_y, v->mb_type[0]);
3052 /* FIXME Set DC val for inter block ? */
3053 if (s->mb_intra && !mb_has_coeffs)
3056 s->ac_pred = get_bits1(gb);
3059 else if (mb_has_coeffs)
3061 if (s->mb_intra) s->ac_pred = get_bits1(gb);
3062 cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
3070 s->current_picture.qscale_table[mb_pos] = mquant;
3072 if (!v->ttmbf && !s->mb_intra && mb_has_coeffs)
3073 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table,
3074 VC1_TTMB_VLC_BITS, 2);
3075 if(!s->mb_intra) vc1_mc_1mv(v, 0);
3079 s->dc_val[0][s->block_index[i]] = 0;
3081 val = ((cbp >> (5 - i)) & 1);
3082 off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);
3083 v->mb_type[0][s->block_index[i]] = s->mb_intra;
3085 /* check if prediction blocks A and C are available */
3086 v->a_avail = v->c_avail = 0;
3087 if(i == 2 || i == 3 || !s->first_slice_line)
3088 v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];
3089 if(i == 1 || i == 3 || s->mb_x)
3090 v->c_avail = v->mb_type[0][s->block_index[i] - 1];
3092 vc1_decode_intra_block(v, s->block[i], i, val, mquant, (i&4)?v->codingset2:v->codingset);
3093 if((i>3) && (s->flags & CODEC_FLAG_GRAY)) continue;
3094 s->dsp.vc1_inv_trans_8x8(s->block[i]);
3095 if(v->rangeredfrm) for(j = 0; j < 64; j++) s->block[i][j] <<= 1;
3096 s->dsp.put_signed_pixels_clamped(s->block[i], s->dest[dst_idx] + off, s->linesize >> ((i & 4) >> 2));
3097 if(v->pq >= 9 && v->overlap) {
3099 s->dsp.vc1_h_overlap(s->dest[dst_idx] + off, s->linesize >> ((i & 4) >> 2));
3101 s->dsp.vc1_v_overlap(s->dest[dst_idx] + off, s->linesize >> ((i & 4) >> 2));
3104 vc1_decode_p_block(v, s->block[i], i, mquant, ttmb, first_block, s->dest[dst_idx] + off, (i&4)?s->uvlinesize:s->linesize, (i&4) && (s->flags & CODEC_FLAG_GRAY));
3105 if(!v->ttmbf && ttmb < 8) ttmb = -1;
3113 for(i = 0; i < 6; i++) {
3114 v->mb_type[0][s->block_index[i]] = 0;
3115 s->dc_val[0][s->block_index[i]] = 0;
3117 s->current_picture.mb_type[mb_pos] = MB_TYPE_SKIP;
3118 s->current_picture.qscale_table[mb_pos] = 0;
3119 vc1_pred_mv(s, 0, 0, 0, 1, v->range_x, v->range_y, v->mb_type[0]);
3126 if (!skipped /* unskipped MB */)
3128 int intra_count = 0, coded_inter = 0;
3129 int is_intra[6], is_coded[6];
3131 cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
3134 val = ((cbp >> (5 - i)) & 1);
3135 s->dc_val[0][s->block_index[i]] = 0;
3142 GET_MVDATA(dmv_x, dmv_y);
3144 vc1_pred_mv(s, i, dmv_x, dmv_y, 0, v->range_x, v->range_y, v->mb_type[0]);
3145 if(!s->mb_intra) vc1_mc_4mv_luma(v, i);
3146 intra_count += s->mb_intra;
3147 is_intra[i] = s->mb_intra;
3148 is_coded[i] = mb_has_coeffs;
3151 is_intra[i] = (intra_count >= 3);
3154 if(i == 4) vc1_mc_4mv_chroma(v);
3155 v->mb_type[0][s->block_index[i]] = is_intra[i];
3156 if(!coded_inter) coded_inter = !is_intra[i] & is_coded[i];
3158 // if there are no coded blocks then don't do anything more
3159 if(!intra_count && !coded_inter) return 0;
3162 s->current_picture.qscale_table[mb_pos] = mquant;
3163 /* test if block is intra and has pred */
3168 if(((!s->first_slice_line || (i==2 || i==3)) && v->mb_type[0][s->block_index[i] - s->block_wrap[i]])
3169 || ((s->mb_x || (i==1 || i==3)) && v->mb_type[0][s->block_index[i] - 1])) {
3174 if(intrapred)s->ac_pred = get_bits1(gb);
3175 else s->ac_pred = 0;
3177 if (!v->ttmbf && coded_inter)
3178 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);
3182 off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);
3183 s->mb_intra = is_intra[i];
3185 /* check if prediction blocks A and C are available */
3186 v->a_avail = v->c_avail = 0;
3187 if(i == 2 || i == 3 || !s->first_slice_line)
3188 v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];
3189 if(i == 1 || i == 3 || s->mb_x)
3190 v->c_avail = v->mb_type[0][s->block_index[i] - 1];
3192 vc1_decode_intra_block(v, s->block[i], i, is_coded[i], mquant, (i&4)?v->codingset2:v->codingset);
3193 if((i>3) && (s->flags & CODEC_FLAG_GRAY)) continue;
3194 s->dsp.vc1_inv_trans_8x8(s->block[i]);
3195 if(v->rangeredfrm) for(j = 0; j < 64; j++) s->block[i][j] <<= 1;
3196 s->dsp.put_signed_pixels_clamped(s->block[i], s->dest[dst_idx] + off, (i&4)?s->uvlinesize:s->linesize);
3197 if(v->pq >= 9 && v->overlap) {
3199 s->dsp.vc1_h_overlap(s->dest[dst_idx] + off, s->linesize >> ((i & 4) >> 2));
3201 s->dsp.vc1_v_overlap(s->dest[dst_idx] + off, s->linesize >> ((i & 4) >> 2));
3203 } else if(is_coded[i]) {
3204 status = vc1_decode_p_block(v, s->block[i], i, mquant, ttmb, first_block, s->dest[dst_idx] + off, (i&4)?s->uvlinesize:s->linesize, (i&4) && (s->flags & CODEC_FLAG_GRAY));
3205 if(!v->ttmbf && ttmb < 8) ttmb = -1;
3214 s->current_picture.qscale_table[mb_pos] = 0;
3215 for (i=0; i<6; i++) {
3216 v->mb_type[0][s->block_index[i]] = 0;
3217 s->dc_val[0][s->block_index[i]] = 0;
3221 vc1_pred_mv(s, i, 0, 0, 0, v->range_x, v->range_y, v->mb_type[0]);
3222 vc1_mc_4mv_luma(v, i);
3224 vc1_mc_4mv_chroma(v);
3225 s->current_picture.qscale_table[mb_pos] = 0;
3230 /* Should never happen */
3234 /** Decode one B-frame MB (in Main profile)
3236 static void vc1_decode_b_mb(VC1Context *v)
3238 MpegEncContext *s = &v->s;
3239 GetBitContext *gb = &s->gb;
3241 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
3242 int cbp = 0; /* cbp decoding stuff */
3243 int mqdiff, mquant; /* MB quantization */
3244 int ttmb = v->ttfrm; /* MB Transform type */
3246 static const int size_table[6] = { 0, 2, 3, 4, 5, 8 },
3247 offset_table[6] = { 0, 1, 3, 7, 15, 31 };
3248 int mb_has_coeffs = 0; /* last_flag */
3249 int index, index1; /* LUT indices */
3250 int val, sign; /* temp values */
3251 int first_block = 1;
3253 int skipped, direct;
3254 int dmv_x[2], dmv_y[2];
3255 int bmvtype = BMV_TYPE_BACKWARD;
3257 mquant = v->pq; /* Loosy initialization */
3261 direct = get_bits1(gb);
3263 direct = v->direct_mb_plane[mb_pos];
3265 skipped = get_bits1(gb);
3267 skipped = v->s.mbskip_table[mb_pos];
3269 s->dsp.clear_blocks(s->block[0]);
3270 dmv_x[0] = dmv_x[1] = dmv_y[0] = dmv_y[1] = 0;
3271 for(i = 0; i < 6; i++) {
3272 v->mb_type[0][s->block_index[i]] = 0;
3273 s->dc_val[0][s->block_index[i]] = 0;
3275 s->current_picture.qscale_table[mb_pos] = 0;
3279 GET_MVDATA(dmv_x[0], dmv_y[0]);
3280 dmv_x[1] = dmv_x[0];
3281 dmv_y[1] = dmv_y[0];
3283 if(skipped || !s->mb_intra) {
3284 bmvtype = decode012(gb);
3287 bmvtype = (v->bfraction >= (B_FRACTION_DEN/2)) ? BMV_TYPE_BACKWARD : BMV_TYPE_FORWARD;
3290 bmvtype = (v->bfraction >= (B_FRACTION_DEN/2)) ? BMV_TYPE_FORWARD : BMV_TYPE_BACKWARD;
3293 bmvtype = BMV_TYPE_INTERPOLATED;
3294 dmv_x[0] = dmv_y[0] = 0;
3298 for(i = 0; i < 6; i++)
3299 v->mb_type[0][s->block_index[i]] = s->mb_intra;
3302 if(direct) bmvtype = BMV_TYPE_INTERPOLATED;
3303 vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);
3304 vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);
3308 cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
3312 s->current_picture.qscale_table[mb_pos] = mquant;
3314 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);
3315 dmv_x[0] = dmv_y[0] = dmv_x[1] = dmv_y[1] = 0;
3316 vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);
3317 vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);
3319 if(!mb_has_coeffs && !s->mb_intra) {
3320 /* no coded blocks - effectively skipped */
3321 vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);
3322 vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);
3325 if(s->mb_intra && !mb_has_coeffs) {
3327 s->current_picture.qscale_table[mb_pos] = mquant;
3328 s->ac_pred = get_bits1(gb);
3330 vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);
3332 if(bmvtype == BMV_TYPE_INTERPOLATED) {
3333 GET_MVDATA(dmv_x[0], dmv_y[0]);
3334 if(!mb_has_coeffs) {
3335 /* interpolated skipped block */
3336 vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);
3337 vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);
3341 vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);
3343 vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);
3346 s->ac_pred = get_bits1(gb);
3347 cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
3349 s->current_picture.qscale_table[mb_pos] = mquant;
3350 if(!v->ttmbf && !s->mb_intra && mb_has_coeffs)
3351 ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);
3357 s->dc_val[0][s->block_index[i]] = 0;
3359 val = ((cbp >> (5 - i)) & 1);
3360 off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);
3361 v->mb_type[0][s->block_index[i]] = s->mb_intra;
3363 /* check if prediction blocks A and C are available */
3364 v->a_avail = v->c_avail = 0;
3365 if(i == 2 || i == 3 || !s->first_slice_line)
3366 v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];
3367 if(i == 1 || i == 3 || s->mb_x)
3368 v->c_avail = v->mb_type[0][s->block_index[i] - 1];
3370 vc1_decode_intra_block(v, s->block[i], i, val, mquant, (i&4)?v->codingset2:v->codingset);
3371 if((i>3) && (s->flags & CODEC_FLAG_GRAY)) continue;
3372 s->dsp.vc1_inv_trans_8x8(s->block[i]);
3373 if(v->rangeredfrm) for(j = 0; j < 64; j++) s->block[i][j] <<= 1;
3374 s->dsp.put_signed_pixels_clamped(s->block[i], s->dest[dst_idx] + off, s->linesize >> ((i & 4) >> 2));
3376 vc1_decode_p_block(v, s->block[i], i, mquant, ttmb, first_block, s->dest[dst_idx] + off, (i&4)?s->uvlinesize:s->linesize, (i&4) && (s->flags & CODEC_FLAG_GRAY));
3377 if(!v->ttmbf && ttmb < 8) ttmb = -1;
3383 /** Decode blocks of I-frame
3385 static void vc1_decode_i_blocks(VC1Context *v)
3388 MpegEncContext *s = &v->s;
3393 /* select codingmode used for VLC tables selection */
3394 switch(v->y_ac_table_index){
3396 v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;
3399 v->codingset = CS_HIGH_MOT_INTRA;
3402 v->codingset = CS_MID_RATE_INTRA;
3406 switch(v->c_ac_table_index){
3408 v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;
3411 v->codingset2 = CS_HIGH_MOT_INTER;
3414 v->codingset2 = CS_MID_RATE_INTER;
3418 /* Set DC scale - y and c use the same */
3419 s->y_dc_scale = s->y_dc_scale_table[v->pq];
3420 s->c_dc_scale = s->c_dc_scale_table[v->pq];
3423 s->mb_x = s->mb_y = 0;
3425 s->first_slice_line = 1;
3426 for(s->mb_y = 0; s->mb_y < s->mb_height; s->mb_y++) {
3427 for(s->mb_x = 0; s->mb_x < s->mb_width; s->mb_x++) {
3428 ff_init_block_index(s);
3429 ff_update_block_index(s);
3430 s->dsp.clear_blocks(s->block[0]);
3431 mb_pos = s->mb_x + s->mb_y * s->mb_width;
3432 s->current_picture.mb_type[mb_pos] = MB_TYPE_INTRA;
3433 s->current_picture.qscale_table[mb_pos] = v->pq;
3434 s->current_picture.motion_val[1][s->block_index[0]][0] = 0;
3435 s->current_picture.motion_val[1][s->block_index[0]][1] = 0;
3437 // do actual MB decoding and displaying
3438 cbp = get_vlc2(&v->s.gb, ff_msmp4_mb_i_vlc.table, MB_INTRA_VLC_BITS, 2);
3439 v->s.ac_pred = get_bits1(&v->s.gb);
3441 for(k = 0; k < 6; k++) {
3442 val = ((cbp >> (5 - k)) & 1);
3445 int pred = vc1_coded_block_pred(&v->s, k, &coded_val);
3449 cbp |= val << (5 - k);
3451 vc1_decode_i_block(v, s->block[k], k, val, (k<4)? v->codingset : v->codingset2);
3453 s->dsp.vc1_inv_trans_8x8(s->block[k]);
3454 if(v->pq >= 9 && v->overlap) {
3455 for(j = 0; j < 64; j++) s->block[k][j] += 128;
3459 vc1_put_block(v, s->block);
3460 if(v->pq >= 9 && v->overlap) {
3462 s->dsp.vc1_h_overlap(s->dest[0], s->linesize);
3463 s->dsp.vc1_h_overlap(s->dest[0] + 8 * s->linesize, s->linesize);
3464 if(!(s->flags & CODEC_FLAG_GRAY)) {
3465 s->dsp.vc1_h_overlap(s->dest[1], s->uvlinesize);
3466 s->dsp.vc1_h_overlap(s->dest[2], s->uvlinesize);
3469 s->dsp.vc1_h_overlap(s->dest[0] + 8, s->linesize);
3470 s->dsp.vc1_h_overlap(s->dest[0] + 8 * s->linesize + 8, s->linesize);
3471 if(!s->first_slice_line) {
3472 s->dsp.vc1_v_overlap(s->dest[0], s->linesize);
3473 s->dsp.vc1_v_overlap(s->dest[0] + 8, s->linesize);
3474 if(!(s->flags & CODEC_FLAG_GRAY)) {
3475 s->dsp.vc1_v_overlap(s->dest[1], s->uvlinesize);
3476 s->dsp.vc1_v_overlap(s->dest[2], s->uvlinesize);
3479 s->dsp.vc1_v_overlap(s->dest[0] + 8 * s->linesize, s->linesize);
3480 s->dsp.vc1_v_overlap(s->dest[0] + 8 * s->linesize + 8, s->linesize);
3483 if(get_bits_count(&s->gb) > v->bits) {
3484 ff_er_add_slice(s, 0, 0, s->mb_x, s->mb_y, (AC_END|DC_END|MV_END));
3485 av_log(s->avctx, AV_LOG_ERROR, "Bits overconsumption: %i > %i\n", get_bits_count(&s->gb), v->bits);
3489 ff_draw_horiz_band(s, s->mb_y * 16, 16);
3490 s->first_slice_line = 0;
3492 ff_er_add_slice(s, 0, 0, s->mb_width - 1, s->mb_height - 1, (AC_END|DC_END|MV_END));
3495 /** Decode blocks of I-frame for advanced profile
3497 static void vc1_decode_i_blocks_adv(VC1Context *v)
3500 MpegEncContext *s = &v->s;
3507 GetBitContext *gb = &s->gb;
3509 /* select codingmode used for VLC tables selection */
3510 switch(v->y_ac_table_index){
3512 v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;
3515 v->codingset = CS_HIGH_MOT_INTRA;
3518 v->codingset = CS_MID_RATE_INTRA;
3522 switch(v->c_ac_table_index){
3524 v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;
3527 v->codingset2 = CS_HIGH_MOT_INTER;
3530 v->codingset2 = CS_MID_RATE_INTER;
3535 s->mb_x = s->mb_y = 0;
3537 s->first_slice_line = 1;
3538 for(s->mb_y = 0; s->mb_y < s->mb_height; s->mb_y++) {
3539 for(s->mb_x = 0; s->mb_x < s->mb_width; s->mb_x++) {
3540 ff_init_block_index(s);
3541 ff_update_block_index(s);
3542 s->dsp.clear_blocks(s->block[0]);
3543 mb_pos = s->mb_x + s->mb_y * s->mb_stride;
3544 s->current_picture.mb_type[mb_pos] = MB_TYPE_INTRA;
3545 s->current_picture.motion_val[1][s->block_index[0]][0] = 0;
3546 s->current_picture.motion_val[1][s->block_index[0]][1] = 0;
3548 // do actual MB decoding and displaying
3549 cbp = get_vlc2(&v->s.gb, ff_msmp4_mb_i_vlc.table, MB_INTRA_VLC_BITS, 2);
3550 if(v->acpred_is_raw)
3551 v->s.ac_pred = get_bits1(&v->s.gb);
3553 v->s.ac_pred = v->acpred_plane[mb_pos];
3555 if(v->condover == CONDOVER_SELECT) {
3556 if(v->overflg_is_raw)
3557 overlap = get_bits1(&v->s.gb);
3559 overlap = v->over_flags_plane[mb_pos];
3561 overlap = (v->condover == CONDOVER_ALL);
3565 s->current_picture.qscale_table[mb_pos] = mquant;
3566 /* Set DC scale - y and c use the same */
3567 s->y_dc_scale = s->y_dc_scale_table[mquant];
3568 s->c_dc_scale = s->c_dc_scale_table[mquant];
3570 for(k = 0; k < 6; k++) {
3571 val = ((cbp >> (5 - k)) & 1);
3574 int pred = vc1_coded_block_pred(&v->s, k, &coded_val);
3578 cbp |= val << (5 - k);
3580 v->a_avail = !s->first_slice_line || (k==2 || k==3);
3581 v->c_avail = !!s->mb_x || (k==1 || k==3);
3583 vc1_decode_i_block_adv(v, s->block[k], k, val, (k<4)? v->codingset : v->codingset2, mquant);
3585 s->dsp.vc1_inv_trans_8x8(s->block[k]);
3586 for(j = 0; j < 64; j++) s->block[k][j] += 128;
3589 vc1_put_block(v, s->block);
3592 s->dsp.vc1_h_overlap(s->dest[0], s->linesize);
3593 s->dsp.vc1_h_overlap(s->dest[0] + 8 * s->linesize, s->linesize);
3594 if(!(s->flags & CODEC_FLAG_GRAY)) {
3595 s->dsp.vc1_h_overlap(s->dest[1], s->uvlinesize);
3596 s->dsp.vc1_h_overlap(s->dest[2], s->uvlinesize);
3599 s->dsp.vc1_h_overlap(s->dest[0] + 8, s->linesize);
3600 s->dsp.vc1_h_overlap(s->dest[0] + 8 * s->linesize + 8, s->linesize);
3601 if(!s->first_slice_line) {
3602 s->dsp.vc1_v_overlap(s->dest[0], s->linesize);
3603 s->dsp.vc1_v_overlap(s->dest[0] + 8, s->linesize);
3604 if(!(s->flags & CODEC_FLAG_GRAY)) {
3605 s->dsp.vc1_v_overlap(s->dest[1], s->uvlinesize);
3606 s->dsp.vc1_v_overlap(s->dest[2], s->uvlinesize);
3609 s->dsp.vc1_v_overlap(s->dest[0] + 8 * s->linesize, s->linesize);
3610 s->dsp.vc1_v_overlap(s->dest[0] + 8 * s->linesize + 8, s->linesize);
3613 if(get_bits_count(&s->gb) > v->bits) {
3614 ff_er_add_slice(s, 0, 0, s->mb_x, s->mb_y, (AC_END|DC_END|MV_END));
3615 av_log(s->avctx, AV_LOG_ERROR, "Bits overconsumption: %i > %i\n", get_bits_count(&s->gb), v->bits);
3619 ff_draw_horiz_band(s, s->mb_y * 16, 16);
3620 s->first_slice_line = 0;
3622 ff_er_add_slice(s, 0, 0, s->mb_width - 1, s->mb_height - 1, (AC_END|DC_END|MV_END));
3625 static void vc1_decode_p_blocks(VC1Context *v)
3627 MpegEncContext *s = &v->s;
3629 /* select codingmode used for VLC tables selection */
3630 switch(v->c_ac_table_index){
3632 v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;
3635 v->codingset = CS_HIGH_MOT_INTRA;
3638 v->codingset = CS_MID_RATE_INTRA;
3642 switch(v->c_ac_table_index){
3644 v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;
3647 v->codingset2 = CS_HIGH_MOT_INTER;
3650 v->codingset2 = CS_MID_RATE_INTER;
3654 s->first_slice_line = 1;
3655 for(s->mb_y = 0; s->mb_y < s->mb_height; s->mb_y++) {
3656 for(s->mb_x = 0; s->mb_x < s->mb_width; s->mb_x++) {
3657 ff_init_block_index(s);
3658 ff_update_block_index(s);
3659 s->dsp.clear_blocks(s->block[0]);
3662 if(get_bits_count(&s->gb) > v->bits || get_bits_count(&s->gb) < 0) {
3663 ff_er_add_slice(s, 0, 0, s->mb_x, s->mb_y, (AC_END|DC_END|MV_END));
3664 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);
3668 ff_draw_horiz_band(s, s->mb_y * 16, 16);
3669 s->first_slice_line = 0;
3671 ff_er_add_slice(s, 0, 0, s->mb_width - 1, s->mb_height - 1, (AC_END|DC_END|MV_END));
3674 static void vc1_decode_b_blocks(VC1Context *v)
3676 MpegEncContext *s = &v->s;
3678 /* select codingmode used for VLC tables selection */
3679 switch(v->c_ac_table_index){
3681 v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;
3684 v->codingset = CS_HIGH_MOT_INTRA;
3687 v->codingset = CS_MID_RATE_INTRA;
3691 switch(v->c_ac_table_index){
3693 v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;
3696 v->codingset2 = CS_HIGH_MOT_INTER;
3699 v->codingset2 = CS_MID_RATE_INTER;
3703 s->first_slice_line = 1;
3704 for(s->mb_y = 0; s->mb_y < s->mb_height; s->mb_y++) {
3705 for(s->mb_x = 0; s->mb_x < s->mb_width; s->mb_x++) {
3706 ff_init_block_index(s);
3707 ff_update_block_index(s);
3708 s->dsp.clear_blocks(s->block[0]);
3711 if(get_bits_count(&s->gb) > v->bits || get_bits_count(&s->gb) < 0) {
3712 ff_er_add_slice(s, 0, 0, s->mb_x, s->mb_y, (AC_END|DC_END|MV_END));
3713 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);
3717 ff_draw_horiz_band(s, s->mb_y * 16, 16);
3718 s->first_slice_line = 0;
3720 ff_er_add_slice(s, 0, 0, s->mb_width - 1, s->mb_height - 1, (AC_END|DC_END|MV_END));
3723 static void vc1_decode_skip_blocks(VC1Context *v)
3725 MpegEncContext *s = &v->s;
3727 ff_er_add_slice(s, 0, 0, s->mb_width - 1, s->mb_height - 1, (AC_END|DC_END|MV_END));
3728 s->first_slice_line = 1;
3729 for(s->mb_y = 0; s->mb_y < s->mb_height; s->mb_y++) {
3731 ff_init_block_index(s);
3732 ff_update_block_index(s);
3733 memcpy(s->dest[0], s->last_picture.data[0] + s->mb_y * 16 * s->linesize, s->linesize * 16);
3734 memcpy(s->dest[1], s->last_picture.data[1] + s->mb_y * 8 * s->uvlinesize, s->uvlinesize * 8);
3735 memcpy(s->dest[2], s->last_picture.data[2] + s->mb_y * 8 * s->uvlinesize, s->uvlinesize * 8);
3736 ff_draw_horiz_band(s, s->mb_y * 16, 16);
3737 s->first_slice_line = 0;
3739 s->pict_type = P_TYPE;
3742 static void vc1_decode_blocks(VC1Context *v)
3745 v->s.esc3_level_length = 0;
3747 ff_intrax8_decode_picture(&v->x8, 2*v->pq+v->halfpq, v->pq*(!v->pquantizer) );
3750 switch(v->s.pict_type) {
3752 if(v->profile == PROFILE_ADVANCED)
3753 vc1_decode_i_blocks_adv(v);
3755 vc1_decode_i_blocks(v);
3758 if(v->p_frame_skipped)
3759 vc1_decode_skip_blocks(v);
3761 vc1_decode_p_blocks(v);
3765 if(v->profile == PROFILE_ADVANCED)
3766 vc1_decode_i_blocks_adv(v);
3768 vc1_decode_i_blocks(v);
3770 vc1_decode_b_blocks(v);
3776 /** Find VC-1 marker in buffer
3777 * @return position where next marker starts or end of buffer if no marker found
3779 static av_always_inline uint8_t* find_next_marker(uint8_t *src, uint8_t *end)
3781 uint32_t mrk = 0xFFFFFFFF;
3783 if(end-src < 4) return end;
3785 mrk = (mrk << 8) | *src++;
3792 static av_always_inline int vc1_unescape_buffer(uint8_t *src, int size, uint8_t *dst)
3797 for(dsize = 0; dsize < size; dsize++) *dst++ = *src++;
3800 for(i = 0; i < size; i++, src++) {
3801 if(src[0] == 3 && i >= 2 && !src[-1] && !src[-2] && i < size-1 && src[1] < 4) {
3802 dst[dsize++] = src[1];
3806 dst[dsize++] = *src;
3811 /** Initialize a VC1/WMV3 decoder
3812 * @todo TODO: Handle VC-1 IDUs (Transport level?)
3813 * @todo TODO: Decypher remaining bits in extra_data
3815 static int vc1_decode_init(AVCodecContext *avctx)
3817 VC1Context *v = avctx->priv_data;
3818 MpegEncContext *s = &v->s;
3821 if (!avctx->extradata_size || !avctx->extradata) return -1;
3822 if (!(avctx->flags & CODEC_FLAG_GRAY))
3823 avctx->pix_fmt = PIX_FMT_YUV420P;
3825 avctx->pix_fmt = PIX_FMT_GRAY8;
3827 avctx->flags |= CODEC_FLAG_EMU_EDGE;
3828 v->s.flags |= CODEC_FLAG_EMU_EDGE;
3830 if(avctx->idct_algo==FF_IDCT_AUTO){
3831 avctx->idct_algo=FF_IDCT_WMV2;
3834 if(ff_h263_decode_init(avctx) < 0)
3836 if (vc1_init_common(v) < 0) return -1;
3838 avctx->coded_width = avctx->width;
3839 avctx->coded_height = avctx->height;
3840 if (avctx->codec_id == CODEC_ID_WMV3)
3844 // looks like WMV3 has a sequence header stored in the extradata
3845 // advanced sequence header may be before the first frame
3846 // the last byte of the extradata is a version number, 1 for the
3847 // samples we can decode
3849 init_get_bits(&gb, avctx->extradata, avctx->extradata_size*8);
3851 if (decode_sequence_header(avctx, &gb) < 0)
3854 count = avctx->extradata_size*8 - get_bits_count(&gb);
3857 av_log(avctx, AV_LOG_INFO, "Extra data: %i bits left, value: %X\n",
3858 count, get_bits(&gb, count));
3862 av_log(avctx, AV_LOG_INFO, "Read %i bits in overflow\n", -count);
3864 } else { // VC1/WVC1
3865 uint8_t *start = avctx->extradata, *end = avctx->extradata + avctx->extradata_size;
3866 uint8_t *next; int size, buf2_size;
3867 uint8_t *buf2 = NULL;
3868 int seq_inited = 0, ep_inited = 0;
3870 if(avctx->extradata_size < 16) {
3871 av_log(avctx, AV_LOG_ERROR, "Extradata size too small: %i\n", avctx->extradata_size);
3875 buf2 = av_mallocz(avctx->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
3876 if(start[0]) start++; // in WVC1 extradata first byte is its size
3878 for(; next < end; start = next){
3879 next = find_next_marker(start + 4, end);
3880 size = next - start - 4;
3881 if(size <= 0) continue;
3882 buf2_size = vc1_unescape_buffer(start + 4, size, buf2);
3883 init_get_bits(&gb, buf2, buf2_size * 8);
3884 switch(AV_RB32(start)){
3885 case VC1_CODE_SEQHDR:
3886 if(decode_sequence_header(avctx, &gb) < 0){
3892 case VC1_CODE_ENTRYPOINT:
3893 if(decode_entry_point(avctx, &gb) < 0){
3902 if(!seq_inited || !ep_inited){
3903 av_log(avctx, AV_LOG_ERROR, "Incomplete extradata\n");
3907 avctx->has_b_frames= !!(avctx->max_b_frames);
3908 s->low_delay = !avctx->has_b_frames;
3910 s->mb_width = (avctx->coded_width+15)>>4;
3911 s->mb_height = (avctx->coded_height+15)>>4;
3913 /* Allocate mb bitplanes */
3914 v->mv_type_mb_plane = av_malloc(s->mb_stride * s->mb_height);
3915 v->direct_mb_plane = av_malloc(s->mb_stride * s->mb_height);
3916 v->acpred_plane = av_malloc(s->mb_stride * s->mb_height);
3917 v->over_flags_plane = av_malloc(s->mb_stride * s->mb_height);
3919 /* allocate block type info in that way so it could be used with s->block_index[] */
3920 v->mb_type_base = av_malloc(s->b8_stride * (s->mb_height * 2 + 1) + s->mb_stride * (s->mb_height + 1) * 2);
3921 v->mb_type[0] = v->mb_type_base + s->b8_stride + 1;
3922 v->mb_type[1] = v->mb_type_base + s->b8_stride * (s->mb_height * 2 + 1) + s->mb_stride + 1;
3923 v->mb_type[2] = v->mb_type[1] + s->mb_stride * (s->mb_height + 1);
3925 /* Init coded blocks info */
3926 if (v->profile == PROFILE_ADVANCED)
3928 // if (alloc_bitplane(&v->over_flags_plane, s->mb_width, s->mb_height) < 0)
3930 // if (alloc_bitplane(&v->ac_pred_plane, s->mb_width, s->mb_height) < 0)
3934 ff_intrax8_common_init(&v->x8,s);
3939 /** Decode a VC1/WMV3 frame
3940 * @todo TODO: Handle VC-1 IDUs (Transport level?)
3942 static int vc1_decode_frame(AVCodecContext *avctx,
3943 void *data, int *data_size,
3944 uint8_t *buf, int buf_size)
3946 VC1Context *v = avctx->priv_data;
3947 MpegEncContext *s = &v->s;
3948 AVFrame *pict = data;
3949 uint8_t *buf2 = NULL;
3951 /* no supplementary picture */
3952 if (buf_size == 0) {
3953 /* special case for last picture */
3954 if (s->low_delay==0 && s->next_picture_ptr) {
3955 *pict= *(AVFrame*)s->next_picture_ptr;
3956 s->next_picture_ptr= NULL;
3958 *data_size = sizeof(AVFrame);
3964 /* We need to set current_picture_ptr before reading the header,
3965 * otherwise we cannot store anything in there. */
3966 if(s->current_picture_ptr==NULL || s->current_picture_ptr->data[0]){
3967 int i= ff_find_unused_picture(s, 0);
3968 s->current_picture_ptr= &s->picture[i];
3971 //for advanced profile we may need to parse and unescape data
3972 if (avctx->codec_id == CODEC_ID_VC1) {
3974 buf2 = av_mallocz(buf_size + FF_INPUT_BUFFER_PADDING_SIZE);
3976 if(IS_MARKER(AV_RB32(buf))){ /* frame starts with marker and needs to be parsed */
3977 uint8_t *start, *end, *next;
3981 for(start = buf, end = buf + buf_size; next < end; start = next){
3982 next = find_next_marker(start + 4, end);
3983 size = next - start - 4;
3984 if(size <= 0) continue;
3985 switch(AV_RB32(start)){
3986 case VC1_CODE_FRAME:
3987 buf_size2 = vc1_unescape_buffer(start + 4, size, buf2);
3989 case VC1_CODE_ENTRYPOINT: /* it should be before frame data */
3990 buf_size2 = vc1_unescape_buffer(start + 4, size, buf2);
3991 init_get_bits(&s->gb, buf2, buf_size2*8);
3992 decode_entry_point(avctx, &s->gb);
3994 case VC1_CODE_SLICE:
3995 av_log(avctx, AV_LOG_ERROR, "Sliced decoding is not implemented (yet)\n");
4000 }else if(v->interlace && ((buf[0] & 0xC0) == 0xC0)){ /* WVC1 interlaced stores both fields divided by marker */
4003 divider = find_next_marker(buf, buf + buf_size);
4004 if((divider == (buf + buf_size)) || AV_RB32(divider) != VC1_CODE_FIELD){
4005 av_log(avctx, AV_LOG_ERROR, "Error in WVC1 interlaced frame\n");
4009 buf_size2 = vc1_unescape_buffer(buf, divider - buf, buf2);
4011 av_free(buf2);return -1;
4013 buf_size2 = vc1_unescape_buffer(buf, buf_size, buf2);
4015 init_get_bits(&s->gb, buf2, buf_size2*8);
4017 init_get_bits(&s->gb, buf, buf_size*8);
4018 // do parse frame header
4019 if(v->profile < PROFILE_ADVANCED) {
4020 if(vc1_parse_frame_header(v, &s->gb) == -1) {
4025 if(vc1_parse_frame_header_adv(v, &s->gb) == -1) {
4031 if(s->pict_type != I_TYPE && !v->res_rtm_flag){
4037 s->current_picture.pict_type= s->pict_type;
4038 s->current_picture.key_frame= s->pict_type == I_TYPE;
4040 /* skip B-frames if we don't have reference frames */
4041 if(s->last_picture_ptr==NULL && (s->pict_type==B_TYPE || s->dropable)){
4043 return -1;//buf_size;
4045 /* skip b frames if we are in a hurry */
4046 if(avctx->hurry_up && s->pict_type==B_TYPE) return -1;//buf_size;
4047 if( (avctx->skip_frame >= AVDISCARD_NONREF && s->pict_type==B_TYPE)
4048 || (avctx->skip_frame >= AVDISCARD_NONKEY && s->pict_type!=I_TYPE)
4049 || avctx->skip_frame >= AVDISCARD_ALL) {
4053 /* skip everything if we are in a hurry>=5 */
4054 if(avctx->hurry_up>=5) {
4056 return -1;//buf_size;
4059 if(s->next_p_frame_damaged){
4060 if(s->pict_type==B_TYPE)
4063 s->next_p_frame_damaged=0;
4066 if(MPV_frame_start(s, avctx) < 0) {
4071 s->me.qpel_put= s->dsp.put_qpel_pixels_tab;
4072 s->me.qpel_avg= s->dsp.avg_qpel_pixels_tab;
4074 ff_er_frame_start(s);
4076 v->bits = buf_size * 8;
4077 vc1_decode_blocks(v);
4078 //av_log(s->avctx, AV_LOG_INFO, "Consumed %i/%i bits\n", get_bits_count(&s->gb), buf_size*8);
4079 // if(get_bits_count(&s->gb) > buf_size * 8)
4085 assert(s->current_picture.pict_type == s->current_picture_ptr->pict_type);
4086 assert(s->current_picture.pict_type == s->pict_type);
4087 if (s->pict_type == B_TYPE || s->low_delay) {
4088 *pict= *(AVFrame*)s->current_picture_ptr;
4089 } else if (s->last_picture_ptr != NULL) {
4090 *pict= *(AVFrame*)s->last_picture_ptr;
4093 if(s->last_picture_ptr || s->low_delay){
4094 *data_size = sizeof(AVFrame);
4095 ff_print_debug_info(s, pict);
4098 /* Return the Picture timestamp as the frame number */
4099 /* we subtract 1 because it is added on utils.c */
4100 avctx->frame_number = s->picture_number - 1;
4107 /** Close a VC1/WMV3 decoder
4108 * @warning Initial try at using MpegEncContext stuff
4110 static int vc1_decode_end(AVCodecContext *avctx)
4112 VC1Context *v = avctx->priv_data;
4114 av_freep(&v->hrd_rate);
4115 av_freep(&v->hrd_buffer);
4116 MPV_common_end(&v->s);
4117 av_freep(&v->mv_type_mb_plane);
4118 av_freep(&v->direct_mb_plane);
4119 av_freep(&v->acpred_plane);
4120 av_freep(&v->over_flags_plane);
4121 av_freep(&v->mb_type_base);
4126 AVCodec vc1_decoder = {
4139 AVCodec wmv3_decoder = {