vaapi_encode_mpeg2: Fix width/height columns/rows confusion
[ffmpeg.git] / libavcodec / vc1_mc.c
1 /*
2  * VC-1 and WMV3 decoder
3  * Copyright (c) 2011 Mashiat Sarker Shakkhar
4  * Copyright (c) 2006-2007 Konstantin Shishkov
5  * Partly based on vc9.c (c) 2005 Anonymous, Alex Beregszaszi, Michael Niedermayer
6  *
7  * This file is part of FFmpeg.
8  *
9  * FFmpeg is free software; you can redistribute it and/or
10  * modify it under the terms of the GNU Lesser General Public
11  * License as published by the Free Software Foundation; either
12  * version 2.1 of the License, or (at your option) any later version.
13  *
14  * FFmpeg is distributed in the hope that it will be useful,
15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
17  * Lesser General Public License for more details.
18  *
19  * You should have received a copy of the GNU Lesser General Public
20  * License along with FFmpeg; if not, write to the Free Software
21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22  */
23
24 /**
25  * @file
26  * VC-1 and WMV3 block decoding routines
27  */
28
29 #include "avcodec.h"
30 #include "h264chroma.h"
31 #include "mathops.h"
32 #include "mpegvideo.h"
33 #include "vc1.h"
34
35 static av_always_inline void vc1_scale_luma(uint8_t *srcY,
36                                             int k, int linesize)
37 {
38     int i, j;
39     for (j = 0; j < k; j++) {
40         for (i = 0; i < k; i++)
41             srcY[i] = ((srcY[i] - 128) >> 1) + 128;
42         srcY += linesize;
43     }
44 }
45
46 static av_always_inline void vc1_scale_chroma(uint8_t *srcU, uint8_t *srcV,
47                                               int k, int uvlinesize)
48 {
49     int i, j;
50     for (j = 0; j < k; j++) {
51         for (i = 0; i < k; i++) {
52             srcU[i] = ((srcU[i] - 128) >> 1) + 128;
53             srcV[i] = ((srcV[i] - 128) >> 1) + 128;
54         }
55         srcU += uvlinesize;
56         srcV += uvlinesize;
57     }
58 }
59
60 static av_always_inline void vc1_lut_scale_luma(uint8_t *srcY,
61                                                 uint8_t *lut1, uint8_t *lut2,
62                                                 int k, int linesize)
63 {
64     int i, j;
65
66     for (j = 0; j < k; j += 2) {
67         for (i = 0; i < k; i++)
68             srcY[i] = lut1[srcY[i]];
69         srcY += linesize;
70
71         if (j + 1 == k)
72             break;
73
74         for (i = 0; i < k; i++)
75             srcY[i] = lut2[srcY[i]];
76         srcY += linesize;
77     }
78 }
79
80 static av_always_inline void vc1_lut_scale_chroma(uint8_t *srcU, uint8_t *srcV,
81                                                   uint8_t *lut1, uint8_t *lut2,
82                                                   int k, int uvlinesize)
83 {
84     int i, j;
85
86     for (j = 0; j < k; j += 2) {
87         for (i = 0; i < k; i++) {
88             srcU[i] = lut1[srcU[i]];
89             srcV[i] = lut1[srcV[i]];
90         }
91         srcU += uvlinesize;
92         srcV += uvlinesize;
93
94         if (j + 1 == k)
95             break;
96
97         for (i = 0; i < k; i++) {
98             srcU[i] = lut2[srcU[i]];
99             srcV[i] = lut2[srcV[i]];
100         }
101         srcU += uvlinesize;
102         srcV += uvlinesize;
103     }
104 }
105
106 static const uint8_t popcount4[16] = { 0, 1, 1, 2, 1, 2, 2, 3, 1, 2, 2, 3, 2, 3, 3, 4 };
107
108 static av_always_inline int get_luma_mv(VC1Context *v, int dir, int16_t *tx, int16_t *ty)
109 {
110     MpegEncContext *s = &v->s;
111     int idx = v->mv_f[dir][s->block_index[0] + v->blocks_off] |
112              (v->mv_f[dir][s->block_index[1] + v->blocks_off] << 1) |
113              (v->mv_f[dir][s->block_index[2] + v->blocks_off] << 2) |
114              (v->mv_f[dir][s->block_index[3] + v->blocks_off] << 3);
115     static const uint8_t index2[16] = { 0, 0, 0, 0x23, 0, 0x13, 0x03, 0, 0, 0x12, 0x02, 0, 0x01, 0, 0, 0 };
116     int opp_count = popcount4[idx];
117
118     switch (opp_count) {
119     case 0:
120     case 4:
121         *tx = median4(s->mv[dir][0][0], s->mv[dir][1][0], s->mv[dir][2][0], s->mv[dir][3][0]);
122         *ty = median4(s->mv[dir][0][1], s->mv[dir][1][1], s->mv[dir][2][1], s->mv[dir][3][1]);
123         break;
124     case 1:
125         *tx = mid_pred(s->mv[dir][idx < 2][0], s->mv[dir][1 + (idx < 4)][0], s->mv[dir][2 + (idx < 8)][0]);
126         *ty = mid_pred(s->mv[dir][idx < 2][1], s->mv[dir][1 + (idx < 4)][1], s->mv[dir][2 + (idx < 8)][1]);
127         break;
128     case 3:
129         *tx = mid_pred(s->mv[dir][idx > 0xd][0], s->mv[dir][1 + (idx > 0xb)][0], s->mv[dir][2 + (idx > 0x7)][0]);
130         *ty = mid_pred(s->mv[dir][idx > 0xd][1], s->mv[dir][1 + (idx > 0xb)][1], s->mv[dir][2 + (idx > 0x7)][1]);
131         break;
132     case 2:
133         *tx = (s->mv[dir][index2[idx] >> 4][0] + s->mv[dir][index2[idx] & 0xf][0]) / 2;
134         *ty = (s->mv[dir][index2[idx] >> 4][1] + s->mv[dir][index2[idx] & 0xf][1]) / 2;
135         break;
136     }
137     return opp_count;
138 }
139
140 static av_always_inline int get_chroma_mv(VC1Context *v, int dir, int16_t *tx, int16_t *ty)
141 {
142     MpegEncContext *s = &v->s;
143     int idx = !v->mb_type[0][s->block_index[0]] |
144              (!v->mb_type[0][s->block_index[1]] << 1) |
145              (!v->mb_type[0][s->block_index[2]] << 2) |
146              (!v->mb_type[0][s->block_index[3]] << 3);
147     static const uint8_t index2[16] = { 0, 0, 0, 0x01, 0, 0x02, 0x12, 0, 0, 0x03, 0x13, 0, 0x23, 0, 0, 0 };
148     int valid_count = popcount4[idx];
149
150     switch (valid_count) {
151     case 4:
152         *tx = median4(s->mv[dir][0][0], s->mv[dir][1][0], s->mv[dir][2][0], s->mv[dir][3][0]);
153         *ty = median4(s->mv[dir][0][1], s->mv[dir][1][1], s->mv[dir][2][1], s->mv[dir][3][1]);
154         break;
155     case 3:
156         *tx = mid_pred(s->mv[dir][idx > 0xd][0], s->mv[dir][1 + (idx > 0xb)][0], s->mv[dir][2 + (idx > 0x7)][0]);
157         *ty = mid_pred(s->mv[dir][idx > 0xd][1], s->mv[dir][1 + (idx > 0xb)][1], s->mv[dir][2 + (idx > 0x7)][1]);
158         break;
159     case 2:
160         *tx = (s->mv[dir][index2[idx] >> 4][0] + s->mv[dir][index2[idx] & 0xf][0]) / 2;
161         *ty = (s->mv[dir][index2[idx] >> 4][1] + s->mv[dir][index2[idx] & 0xf][1]) / 2;
162         break;
163     default:
164         return 0;
165     }
166     return valid_count;
167 }
168
169 /** Do motion compensation over 1 macroblock
170  * Mostly adapted hpel_motion and qpel_motion from mpegvideo.c
171  */
172 void ff_vc1_mc_1mv(VC1Context *v, int dir)
173 {
174     MpegEncContext *s = &v->s;
175     H264ChromaContext *h264chroma = &v->h264chroma;
176     uint8_t *srcY, *srcU, *srcV;
177     int dxy, mx, my, uvmx, uvmy, src_x, src_y, uvsrc_x, uvsrc_y;
178     int v_edge_pos = s->v_edge_pos >> v->field_mode;
179     int i;
180     uint8_t (*luty)[256], (*lutuv)[256];
181     int use_ic;
182     int interlace;
183     int linesize, uvlinesize;
184
185     if ((!v->field_mode ||
186          (v->ref_field_type[dir] == 1 && v->cur_field_type == 1)) &&
187         !v->s.last_picture.f->data[0])
188         return;
189
190     linesize = s->current_picture_ptr->f->linesize[0];
191     uvlinesize = s->current_picture_ptr->f->linesize[1];
192
193     mx = s->mv[dir][0][0];
194     my = s->mv[dir][0][1];
195
196     // store motion vectors for further use in B-frames
197     if (s->pict_type == AV_PICTURE_TYPE_P) {
198         for (i = 0; i < 4; i++) {
199             s->current_picture.motion_val[1][s->block_index[i] + v->blocks_off][0] = mx;
200             s->current_picture.motion_val[1][s->block_index[i] + v->blocks_off][1] = my;
201         }
202     }
203
204     uvmx = (mx + ((mx & 3) == 3)) >> 1;
205     uvmy = (my + ((my & 3) == 3)) >> 1;
206     v->luma_mv[s->mb_x][0] = uvmx;
207     v->luma_mv[s->mb_x][1] = uvmy;
208
209     if (v->field_mode &&
210         v->cur_field_type != v->ref_field_type[dir]) {
211         my   = my   - 2 + 4 * v->cur_field_type;
212         uvmy = uvmy - 2 + 4 * v->cur_field_type;
213     }
214
215     // fastuvmc shall be ignored for interlaced frame picture
216     if (v->fastuvmc && (v->fcm != ILACE_FRAME)) {
217         uvmx = uvmx + ((uvmx < 0) ? (uvmx & 1) : -(uvmx & 1));
218         uvmy = uvmy + ((uvmy < 0) ? (uvmy & 1) : -(uvmy & 1));
219     }
220     if (!dir) {
221         if (v->field_mode && (v->cur_field_type != v->ref_field_type[dir]) && v->second_field) {
222             srcY = s->current_picture.f->data[0];
223             srcU = s->current_picture.f->data[1];
224             srcV = s->current_picture.f->data[2];
225             luty  = v->curr_luty;
226             lutuv = v->curr_lutuv;
227             use_ic = *v->curr_use_ic;
228             interlace = 1;
229         } else {
230             srcY = s->last_picture.f->data[0];
231             srcU = s->last_picture.f->data[1];
232             srcV = s->last_picture.f->data[2];
233             luty  = v->last_luty;
234             lutuv = v->last_lutuv;
235             use_ic = v->last_use_ic;
236             interlace = s->last_picture.f->interlaced_frame;
237         }
238     } else {
239         srcY = s->next_picture.f->data[0];
240         srcU = s->next_picture.f->data[1];
241         srcV = s->next_picture.f->data[2];
242         luty  = v->next_luty;
243         lutuv = v->next_lutuv;
244         use_ic = v->next_use_ic;
245         interlace = s->next_picture.f->interlaced_frame;
246     }
247
248     if (!srcY || !srcU) {
249         av_log(v->s.avctx, AV_LOG_ERROR, "Referenced frame missing.\n");
250         return;
251     }
252
253     src_x   = s->mb_x * 16 + (mx   >> 2);
254     src_y   = s->mb_y * 16 + (my   >> 2);
255     uvsrc_x = s->mb_x *  8 + (uvmx >> 2);
256     uvsrc_y = s->mb_y *  8 + (uvmy >> 2);
257
258     if (v->profile != PROFILE_ADVANCED) {
259         src_x   = av_clip(  src_x, -16, s->mb_width  * 16);
260         src_y   = av_clip(  src_y, -16, s->mb_height * 16);
261         uvsrc_x = av_clip(uvsrc_x,  -8, s->mb_width  *  8);
262         uvsrc_y = av_clip(uvsrc_y,  -8, s->mb_height *  8);
263     } else {
264         src_x   = av_clip(  src_x, -17, s->avctx->coded_width);
265         uvsrc_x = av_clip(uvsrc_x,  -8, s->avctx->coded_width  >> 1);
266         if (v->fcm == ILACE_FRAME) {
267             src_y = av_clip(src_y, -18 + (src_y & 1), s->avctx->coded_height + (src_y & 1));
268             uvsrc_y = av_clip(uvsrc_y, -8 + (uvsrc_y & 1), (s->avctx->coded_height >> 1) + (uvsrc_y & 1));
269         } else {
270             src_y = av_clip(src_y, -18, s->avctx->coded_height + 1);
271             uvsrc_y = av_clip(uvsrc_y, -8, s->avctx->coded_height >> 1);
272         }
273     }
274
275     srcY += src_y   * s->linesize   + src_x;
276     srcU += uvsrc_y * s->uvlinesize + uvsrc_x;
277     srcV += uvsrc_y * s->uvlinesize + uvsrc_x;
278
279     if (v->field_mode && v->ref_field_type[dir]) {
280         srcY += linesize;
281         srcU += uvlinesize;
282         srcV += uvlinesize;
283     }
284
285     /* for grayscale we should not try to read from unknown area */
286     if (CONFIG_GRAY && s->avctx->flags & AV_CODEC_FLAG_GRAY) {
287         srcU = s->sc.edge_emu_buffer + 18 * s->linesize;
288         srcV = s->sc.edge_emu_buffer + 18 * s->linesize;
289     }
290
291     if (v->rangeredfrm || use_ic
292         || s->h_edge_pos < 22 || v_edge_pos < 22
293         || (unsigned)(src_x - s->mspel) > s->h_edge_pos - (mx&3) - 16 - s->mspel * 3
294         || (unsigned)(src_y - 1)        > v_edge_pos    - (my&3) - 16 - 3) {
295         uint8_t *ubuf = s->sc.edge_emu_buffer + 19 * s->linesize;
296         uint8_t *vbuf = ubuf + 9 * s->uvlinesize;
297         const int k = 17 + s->mspel * 2;
298
299         srcY -= s->mspel * (1 + s->linesize);
300         if (interlace) {
301             s->vdsp.emulated_edge_mc(s->sc.edge_emu_buffer,
302                                      srcY,
303                                      linesize << 1,
304                                      linesize << 1,
305                                      k,
306                                      v->field_mode ? k : k + 1 >> 1,
307                                      src_x - s->mspel,
308                                      src_y - s->mspel >> !v->field_mode,
309                                      s->h_edge_pos,
310                                      s->v_edge_pos >> 1);
311             if (!v->field_mode)
312                 s->vdsp.emulated_edge_mc(s->sc.edge_emu_buffer + linesize,
313                                          srcY + linesize,
314                                          linesize << 1,
315                                          linesize << 1,
316                                          k,
317                                          k >> 1,
318                                          src_x - s->mspel,
319                                          src_y - s->mspel + 1 >> 1,
320                                          s->h_edge_pos,
321                                          s->v_edge_pos >> 1);
322         } else
323             s->vdsp.emulated_edge_mc(s->sc.edge_emu_buffer,
324                                      srcY,
325                                      linesize,
326                                      linesize,
327                                      k,
328                                      v->field_mode ? (k << 1) - 1 : k,
329                                      src_x - s->mspel,
330                                      v->field_mode ? 2 * (src_y - s->mspel) + v->ref_field_type[dir] :
331                                                      src_y - s->mspel,
332                                      s->h_edge_pos,
333                                      s->v_edge_pos);
334         srcY = s->sc.edge_emu_buffer;
335         if (interlace) {
336             s->vdsp.emulated_edge_mc(ubuf,
337                                      srcU,
338                                      uvlinesize << 1,
339                                      uvlinesize << 1,
340                                      9,
341                                      v->field_mode ? 9 : 5,
342                                      uvsrc_x,
343                                      uvsrc_y >> !v->field_mode,
344                                      s->h_edge_pos >> 1,
345                                      s->v_edge_pos >> 2);
346             s->vdsp.emulated_edge_mc(vbuf,
347                                      srcV,
348                                      uvlinesize << 1,
349                                      uvlinesize << 1,
350                                      9,
351                                      v->field_mode ? 9 : 5,
352                                      uvsrc_x,
353                                      uvsrc_y >> !v->field_mode,
354                                      s->h_edge_pos >> 1,
355                                      s->v_edge_pos >> 2);
356             if (!v->field_mode) {
357                 s->vdsp.emulated_edge_mc(ubuf + uvlinesize,
358                                          srcU + uvlinesize,
359                                          uvlinesize << 1,
360                                          uvlinesize << 1,
361                                          9,
362                                          4,
363                                          uvsrc_x,
364                                          uvsrc_y + 1 >> 1,
365                                          s->h_edge_pos >> 1,
366                                          s->v_edge_pos >> 2);
367                 s->vdsp.emulated_edge_mc(vbuf + uvlinesize,
368                                          srcV + uvlinesize,
369                                          uvlinesize << 1,
370                                          uvlinesize << 1,
371                                          9,
372                                          4,
373                                          uvsrc_x,
374                                          uvsrc_y + 1 >> 1,
375                                          s->h_edge_pos >> 1,
376                                          s->v_edge_pos >> 2);
377             }
378         } else {
379             s->vdsp.emulated_edge_mc(ubuf,
380                                      srcU,
381                                      uvlinesize,
382                                      uvlinesize,
383                                      9,
384                                      v->field_mode ? 17 : 9,
385                                      uvsrc_x,
386                                      v->field_mode ? 2 * uvsrc_y + v->ref_field_type[dir] : uvsrc_y,
387                                      s->h_edge_pos >> 1,
388                                      s->v_edge_pos >> 1);
389             s->vdsp.emulated_edge_mc(vbuf,
390                                      srcV,
391                                      uvlinesize,
392                                      uvlinesize,
393                                      9,
394                                      v->field_mode ? 17 : 9,
395                                      uvsrc_x,
396                                      v->field_mode ? 2 * uvsrc_y + v->ref_field_type[dir] : uvsrc_y,
397                                      s->h_edge_pos >> 1,
398                                      s->v_edge_pos >> 1);
399         }
400         srcU = ubuf;
401         srcV = vbuf;
402         /* if we deal with range reduction we need to scale source blocks */
403         if (v->rangeredfrm) {
404             vc1_scale_luma(srcY, k, s->linesize);
405             vc1_scale_chroma(srcU, srcV, 9, s->uvlinesize);
406         }
407         /* if we deal with intensity compensation we need to scale source blocks */
408         if (use_ic) {
409             vc1_lut_scale_luma(srcY,
410                                luty[v->field_mode ? v->ref_field_type[dir] : ((0 + src_y - s->mspel) & 1)],
411                                luty[v->field_mode ? v->ref_field_type[dir] : ((1 + src_y - s->mspel) & 1)],
412                                k, s->linesize);
413             vc1_lut_scale_chroma(srcU, srcV,
414                                  lutuv[v->field_mode ? v->ref_field_type[dir] : ((0 + uvsrc_y) & 1)],
415                                  lutuv[v->field_mode ? v->ref_field_type[dir] : ((1 + uvsrc_y) & 1)],
416                                  9, s->uvlinesize);
417         }
418         srcY += s->mspel * (1 + s->linesize);
419     }
420
421     if (s->mspel) {
422         dxy = ((my & 3) << 2) | (mx & 3);
423         v->vc1dsp.put_vc1_mspel_pixels_tab[0][dxy](s->dest[0], srcY, s->linesize, v->rnd);
424     } else { // hpel mc - always used for luma
425         dxy = (my & 2) | ((mx & 2) >> 1);
426         if (!v->rnd)
427             s->hdsp.put_pixels_tab[0][dxy](s->dest[0], srcY, s->linesize, 16);
428         else
429             s->hdsp.put_no_rnd_pixels_tab[0][dxy](s->dest[0], srcY, s->linesize, 16);
430     }
431
432     if (CONFIG_GRAY && s->avctx->flags & AV_CODEC_FLAG_GRAY)
433         return;
434     /* Chroma MC always uses qpel bilinear */
435     uvmx = (uvmx & 3) << 1;
436     uvmy = (uvmy & 3) << 1;
437     if (!v->rnd) {
438         h264chroma->put_h264_chroma_pixels_tab[0](s->dest[1], srcU, s->uvlinesize, 8, uvmx, uvmy);
439         h264chroma->put_h264_chroma_pixels_tab[0](s->dest[2], srcV, s->uvlinesize, 8, uvmx, uvmy);
440     } else {
441         v->vc1dsp.put_no_rnd_vc1_chroma_pixels_tab[0](s->dest[1], srcU, s->uvlinesize, 8, uvmx, uvmy);
442         v->vc1dsp.put_no_rnd_vc1_chroma_pixels_tab[0](s->dest[2], srcV, s->uvlinesize, 8, uvmx, uvmy);
443     }
444     if (v->field_mode) {
445         v->mv_f[dir][s->block_index[4] + v->mb_off] = v->cur_field_type != v->ref_field_type[dir];
446         v->mv_f[dir][s->block_index[5] + v->mb_off] = v->cur_field_type != v->ref_field_type[dir];
447     }
448 }
449
450 /** Do motion compensation for 4-MV macroblock - luminance block
451  */
452 void ff_vc1_mc_4mv_luma(VC1Context *v, int n, int dir, int avg)
453 {
454     MpegEncContext *s = &v->s;
455     uint8_t *srcY;
456     int dxy, mx, my, src_x, src_y;
457     int off;
458     int fieldmv = (v->fcm == ILACE_FRAME) ? v->blk_mv_type[s->block_index[n]] : 0;
459     int v_edge_pos = s->v_edge_pos >> v->field_mode;
460     uint8_t (*luty)[256];
461     int use_ic;
462     int interlace;
463     int linesize;
464
465     if ((!v->field_mode ||
466          (v->ref_field_type[dir] == 1 && v->cur_field_type == 1)) &&
467         !v->s.last_picture.f->data[0])
468         return;
469
470     linesize = s->current_picture_ptr->f->linesize[0];
471
472     mx = s->mv[dir][n][0];
473     my = s->mv[dir][n][1];
474
475     if (!dir) {
476         if (v->field_mode && (v->cur_field_type != v->ref_field_type[dir]) && v->second_field) {
477             srcY = s->current_picture.f->data[0];
478             luty = v->curr_luty;
479             use_ic = *v->curr_use_ic;
480             interlace = 1;
481         } else {
482             srcY = s->last_picture.f->data[0];
483             luty = v->last_luty;
484             use_ic = v->last_use_ic;
485             interlace = s->last_picture.f->interlaced_frame;
486         }
487     } else {
488         srcY = s->next_picture.f->data[0];
489         luty = v->next_luty;
490         use_ic = v->next_use_ic;
491         interlace = s->next_picture.f->interlaced_frame;
492     }
493
494     if (!srcY) {
495         av_log(v->s.avctx, AV_LOG_ERROR, "Referenced frame missing.\n");
496         return;
497     }
498
499     if (v->field_mode) {
500         if (v->cur_field_type != v->ref_field_type[dir])
501             my = my - 2 + 4 * v->cur_field_type;
502     }
503
504     if (s->pict_type == AV_PICTURE_TYPE_P && n == 3 && v->field_mode) {
505         int opp_count = get_luma_mv(v, 0,
506                                     &s->current_picture.motion_val[1][s->block_index[0] + v->blocks_off][0],
507                                     &s->current_picture.motion_val[1][s->block_index[0] + v->blocks_off][1]);
508         int k, f = opp_count > 2;
509         for (k = 0; k < 4; k++)
510             v->mv_f[1][s->block_index[k] + v->blocks_off] = f;
511     }
512
513     if (v->fcm == ILACE_FRAME) {  // not sure if needed for other types of picture
514         int qx, qy;
515         int width  = s->avctx->coded_width;
516         int height = s->avctx->coded_height >> 1;
517         if (s->pict_type == AV_PICTURE_TYPE_P) {
518             s->current_picture.motion_val[1][s->block_index[n] + v->blocks_off][0] = mx;
519             s->current_picture.motion_val[1][s->block_index[n] + v->blocks_off][1] = my;
520         }
521         qx = (s->mb_x * 16) + (mx >> 2);
522         qy = (s->mb_y *  8) + (my >> 3);
523
524         if (qx < -17)
525             mx -= 4 * (qx + 17);
526         else if (qx > width)
527             mx -= 4 * (qx - width);
528         if (qy < -18)
529             my -= 8 * (qy + 18);
530         else if (qy > height + 1)
531             my -= 8 * (qy - height - 1);
532     }
533
534     if ((v->fcm == ILACE_FRAME) && fieldmv)
535         off = ((n > 1) ? s->linesize : 0) + (n & 1) * 8;
536     else
537         off = s->linesize * 4 * (n & 2) + (n & 1) * 8;
538
539     src_x = s->mb_x * 16 + (n & 1) * 8 + (mx >> 2);
540     if (!fieldmv)
541         src_y = s->mb_y * 16 + (n & 2) * 4 + (my >> 2);
542     else
543         src_y = s->mb_y * 16 + ((n > 1) ? 1 : 0) + (my >> 2);
544
545     if (v->profile != PROFILE_ADVANCED) {
546         src_x = av_clip(src_x, -16, s->mb_width  * 16);
547         src_y = av_clip(src_y, -16, s->mb_height * 16);
548     } else {
549         src_x = av_clip(src_x, -17, s->avctx->coded_width);
550         if (v->fcm == ILACE_FRAME)
551             src_y = av_clip(src_y, -18 + (src_y & 1), s->avctx->coded_height + (src_y & 1));
552         else
553             src_y = av_clip(src_y, -18, s->avctx->coded_height + 1);
554     }
555
556     srcY += src_y * s->linesize + src_x;
557     if (v->field_mode && v->ref_field_type[dir])
558         srcY += linesize;
559
560     if (v->rangeredfrm || use_ic
561         || s->h_edge_pos < 13 || v_edge_pos < 23
562         || (unsigned)(src_x - s->mspel) > s->h_edge_pos - (mx & 3) - 8 - s->mspel * 2
563         || (unsigned)(src_y - (s->mspel << fieldmv)) > v_edge_pos - (my & 3) - ((8 + s->mspel * 2) << fieldmv)) {
564         const int k = 9 + s->mspel * 2;
565
566         srcY -= s->mspel * (1 + (s->linesize << fieldmv));
567         /* check emulate edge stride and offset */
568         if (interlace) {
569             s->vdsp.emulated_edge_mc(s->sc.edge_emu_buffer,
570                                      srcY,
571                                      linesize << 1,
572                                      linesize << 1,
573                                      k,
574                                      v->field_mode ? k : (k << fieldmv) + 1 >> 1,
575                                      src_x - s->mspel,
576                                      src_y - (s->mspel << fieldmv) >> !v->field_mode,
577                                      s->h_edge_pos,
578                                      s->v_edge_pos >> 1);
579             if (!v->field_mode && !fieldmv)
580                 s->vdsp.emulated_edge_mc(s->sc.edge_emu_buffer + linesize,
581                                          srcY + linesize,
582                                          linesize << 1,
583                                          linesize << 1,
584                                          k,
585                                          k >> 1,
586                                          src_x - s->mspel,
587                                          src_y - s->mspel + 1 >> 1,
588                                          s->h_edge_pos,
589                                          s->v_edge_pos >> 1);
590         } else
591             s->vdsp.emulated_edge_mc(s->sc.edge_emu_buffer,
592                                      srcY,
593                                      linesize,
594                                      linesize,
595                                      k,
596                                      v->field_mode ? (k << 1) - 1 : k << fieldmv,
597                                      src_x - s->mspel,
598                                      v->field_mode ? 2 * (src_y - s->mspel) + v->ref_field_type[dir] :
599                                                      src_y - (s->mspel << fieldmv),
600                                      s->h_edge_pos,
601                                      s->v_edge_pos);
602         srcY = s->sc.edge_emu_buffer;
603         /* if we deal with range reduction we need to scale source blocks */
604         if (v->rangeredfrm) {
605             vc1_scale_luma(srcY, k, s->linesize << fieldmv);
606         }
607         /* if we deal with intensity compensation we need to scale source blocks */
608         if (use_ic) {
609             vc1_lut_scale_luma(srcY,
610                                luty[v->field_mode ? v->ref_field_type[dir] : (((0<<fieldmv)+src_y - (s->mspel << fieldmv)) & 1)],
611                                luty[v->field_mode ? v->ref_field_type[dir] : (((1<<fieldmv)+src_y - (s->mspel << fieldmv)) & 1)],
612                                k, s->linesize << fieldmv);
613         }
614         srcY += s->mspel * (1 + (s->linesize << fieldmv));
615     }
616
617     if (s->mspel) {
618         dxy = ((my & 3) << 2) | (mx & 3);
619         if (avg)
620             v->vc1dsp.avg_vc1_mspel_pixels_tab[1][dxy](s->dest[0] + off, srcY, s->linesize << fieldmv, v->rnd);
621         else
622             v->vc1dsp.put_vc1_mspel_pixels_tab[1][dxy](s->dest[0] + off, srcY, s->linesize << fieldmv, v->rnd);
623     } else { // hpel mc - always used for luma
624         dxy = (my & 2) | ((mx & 2) >> 1);
625         if (!v->rnd)
626             s->hdsp.put_pixels_tab[1][dxy](s->dest[0] + off, srcY, s->linesize, 8);
627         else
628             s->hdsp.put_no_rnd_pixels_tab[1][dxy](s->dest[0] + off, srcY, s->linesize, 8);
629     }
630 }
631
632 /** Do motion compensation for 4-MV macroblock - both chroma blocks
633  */
634 void ff_vc1_mc_4mv_chroma(VC1Context *v, int dir)
635 {
636     MpegEncContext *s = &v->s;
637     H264ChromaContext *h264chroma = &v->h264chroma;
638     uint8_t *srcU, *srcV;
639     int uvmx, uvmy, uvsrc_x, uvsrc_y;
640     int16_t tx, ty;
641     int chroma_ref_type;
642     int v_edge_pos = s->v_edge_pos >> v->field_mode;
643     uint8_t (*lutuv)[256];
644     int use_ic;
645     int interlace;
646     int uvlinesize;
647
648     if (!v->field_mode && !v->s.last_picture.f->data[0])
649         return;
650     if (CONFIG_GRAY && s->avctx->flags & AV_CODEC_FLAG_GRAY)
651         return;
652
653     /* calculate chroma MV vector from four luma MVs */
654     if (!v->field_mode || !v->numref) {
655         int valid_count = get_chroma_mv(v, dir, &tx, &ty);
656         if (!valid_count) {
657             s->current_picture.motion_val[1][s->block_index[0] + v->blocks_off][0] = 0;
658             s->current_picture.motion_val[1][s->block_index[0] + v->blocks_off][1] = 0;
659             v->luma_mv[s->mb_x][0] = v->luma_mv[s->mb_x][1] = 0;
660             return; //no need to do MC for intra blocks
661         }
662         chroma_ref_type = v->ref_field_type[dir];
663     } else {
664         int opp_count = get_luma_mv(v, dir, &tx, &ty);
665         chroma_ref_type = v->cur_field_type ^ (opp_count > 2);
666     }
667     if (v->field_mode && chroma_ref_type == 1 && v->cur_field_type == 1 && !v->s.last_picture.f->data[0])
668         return;
669     s->current_picture.motion_val[1][s->block_index[0] + v->blocks_off][0] = tx;
670     s->current_picture.motion_val[1][s->block_index[0] + v->blocks_off][1] = ty;
671
672     uvlinesize = s->current_picture_ptr->f->linesize[1];
673
674     uvmx = (tx + ((tx & 3) == 3)) >> 1;
675     uvmy = (ty + ((ty & 3) == 3)) >> 1;
676
677     v->luma_mv[s->mb_x][0] = uvmx;
678     v->luma_mv[s->mb_x][1] = uvmy;
679
680     if (v->fastuvmc) {
681         uvmx = uvmx + ((uvmx < 0) ? (uvmx & 1) : -(uvmx & 1));
682         uvmy = uvmy + ((uvmy < 0) ? (uvmy & 1) : -(uvmy & 1));
683     }
684     // Field conversion bias
685     if (v->cur_field_type != chroma_ref_type)
686         uvmy += 2 - 4 * chroma_ref_type;
687
688     uvsrc_x = s->mb_x * 8 + (uvmx >> 2);
689     uvsrc_y = s->mb_y * 8 + (uvmy >> 2);
690
691     if (v->profile != PROFILE_ADVANCED) {
692         uvsrc_x = av_clip(uvsrc_x, -8, s->mb_width  * 8);
693         uvsrc_y = av_clip(uvsrc_y, -8, s->mb_height * 8);
694     } else {
695         uvsrc_x = av_clip(uvsrc_x, -8, s->avctx->coded_width  >> 1);
696         uvsrc_y = av_clip(uvsrc_y, -8, s->avctx->coded_height >> 1);
697     }
698
699     if (!dir) {
700         if (v->field_mode && (v->cur_field_type != chroma_ref_type) && v->second_field) {
701             srcU = s->current_picture.f->data[1];
702             srcV = s->current_picture.f->data[2];
703             lutuv = v->curr_lutuv;
704             use_ic = *v->curr_use_ic;
705             interlace = 1;
706         } else {
707             srcU = s->last_picture.f->data[1];
708             srcV = s->last_picture.f->data[2];
709             lutuv = v->last_lutuv;
710             use_ic = v->last_use_ic;
711             interlace = s->last_picture.f->interlaced_frame;
712         }
713     } else {
714         srcU = s->next_picture.f->data[1];
715         srcV = s->next_picture.f->data[2];
716         lutuv = v->next_lutuv;
717         use_ic = v->next_use_ic;
718         interlace = s->next_picture.f->interlaced_frame;
719     }
720
721     if (!srcU) {
722         av_log(v->s.avctx, AV_LOG_ERROR, "Referenced frame missing.\n");
723         return;
724     }
725
726     srcU += uvsrc_y * s->uvlinesize + uvsrc_x;
727     srcV += uvsrc_y * s->uvlinesize + uvsrc_x;
728
729     if (v->field_mode) {
730         if (chroma_ref_type) {
731             srcU += uvlinesize;
732             srcV += uvlinesize;
733         }
734     }
735
736     if (v->rangeredfrm || use_ic
737         || s->h_edge_pos < 18 || v_edge_pos < 18
738         || (unsigned)uvsrc_x > (s->h_edge_pos >> 1) - 9
739         || (unsigned)uvsrc_y > (v_edge_pos    >> 1) - 9) {
740         if (interlace) {
741             s->vdsp.emulated_edge_mc(s->sc.edge_emu_buffer,
742                                      srcU,
743                                      uvlinesize << 1,
744                                      uvlinesize << 1,
745                                      9,
746                                      v->field_mode ? 9 : 5,
747                                      uvsrc_x,
748                                      uvsrc_y >> !v->field_mode,
749                                      s->h_edge_pos >> 1,
750                                      s->v_edge_pos >> 2);
751             s->vdsp.emulated_edge_mc(s->sc.edge_emu_buffer + 16,
752                                      srcV,
753                                      uvlinesize << 1,
754                                      uvlinesize << 1,
755                                      9,
756                                      v->field_mode ? 9 : 5,
757                                      uvsrc_x,
758                                      uvsrc_y >> !v->field_mode,
759                                      s->h_edge_pos >> 1,
760                                      s->v_edge_pos >> 2);
761             if (!v->field_mode) {
762                 s->vdsp.emulated_edge_mc(s->sc.edge_emu_buffer + uvlinesize,
763                                          srcU + uvlinesize,
764                                          uvlinesize << 1,
765                                          uvlinesize << 1,
766                                          9,
767                                          4,
768                                          uvsrc_x,
769                                          uvsrc_y + 1 >> 1,
770                                          s->h_edge_pos >> 1,
771                                          s->v_edge_pos >> 2);
772                 s->vdsp.emulated_edge_mc(s->sc.edge_emu_buffer + 16 + uvlinesize,
773                                          srcV + uvlinesize,
774                                          uvlinesize << 1,
775                                          uvlinesize << 1,
776                                          9,
777                                          4,
778                                          uvsrc_x,
779                                          uvsrc_y + 1 >> 1,
780                                          s->h_edge_pos >> 1,
781                                          s->v_edge_pos >> 2);
782             }
783         } else {
784             s->vdsp.emulated_edge_mc(s->sc.edge_emu_buffer,
785                                      srcU,
786                                      uvlinesize,
787                                      uvlinesize,
788                                      9,
789                                      v->field_mode ? 17 : 9,
790                                      uvsrc_x,
791                                      v->field_mode ? 2 * uvsrc_y + chroma_ref_type : uvsrc_y,
792                                      s->h_edge_pos >> 1,
793                                      s->v_edge_pos >> 1);
794             s->vdsp.emulated_edge_mc(s->sc.edge_emu_buffer + 16,
795                                      srcV,
796                                      uvlinesize,
797                                      uvlinesize,
798                                      9,
799                                      v->field_mode ? 17 : 9,
800                                      uvsrc_x,
801                                      v->field_mode ? 2 * uvsrc_y + chroma_ref_type : uvsrc_y,
802                                      s->h_edge_pos >> 1,
803                                      s->v_edge_pos >> 1);
804         }
805         srcU = s->sc.edge_emu_buffer;
806         srcV = s->sc.edge_emu_buffer + 16;
807
808         /* if we deal with range reduction we need to scale source blocks */
809         if (v->rangeredfrm) {
810             vc1_scale_chroma(srcU, srcV, 9, s->uvlinesize);
811         }
812         /* if we deal with intensity compensation we need to scale source blocks */
813         if (use_ic) {
814             vc1_lut_scale_chroma(srcU, srcV,
815                                  lutuv[v->field_mode ? chroma_ref_type : ((0 + uvsrc_y) & 1)],
816                                  lutuv[v->field_mode ? chroma_ref_type : ((1 + uvsrc_y) & 1)],
817                                  9, s->uvlinesize);
818         }
819     }
820
821     /* Chroma MC always uses qpel bilinear */
822     uvmx = (uvmx & 3) << 1;
823     uvmy = (uvmy & 3) << 1;
824     if (!v->rnd) {
825         h264chroma->put_h264_chroma_pixels_tab[0](s->dest[1], srcU, s->uvlinesize, 8, uvmx, uvmy);
826         h264chroma->put_h264_chroma_pixels_tab[0](s->dest[2], srcV, s->uvlinesize, 8, uvmx, uvmy);
827     } else {
828         v->vc1dsp.put_no_rnd_vc1_chroma_pixels_tab[0](s->dest[1], srcU, s->uvlinesize, 8, uvmx, uvmy);
829         v->vc1dsp.put_no_rnd_vc1_chroma_pixels_tab[0](s->dest[2], srcV, s->uvlinesize, 8, uvmx, uvmy);
830     }
831     if (v->field_mode) {
832         v->mv_f[dir][s->block_index[4] + v->mb_off] = v->cur_field_type != chroma_ref_type;
833         v->mv_f[dir][s->block_index[5] + v->mb_off] = v->cur_field_type != chroma_ref_type;
834     }
835 }
836
837 /** Do motion compensation for 4-MV interlaced frame chroma macroblock (both U and V)
838  */
839 void ff_vc1_mc_4mv_chroma4(VC1Context *v, int dir, int dir2, int avg)
840 {
841     MpegEncContext *s = &v->s;
842     H264ChromaContext *h264chroma = &v->h264chroma;
843     uint8_t *srcU, *srcV;
844     int uvsrc_x, uvsrc_y;
845     int uvmx_field[4], uvmy_field[4];
846     int i, off, tx, ty;
847     int fieldmv = v->blk_mv_type[s->block_index[0]];
848     static const uint8_t s_rndtblfield[16] = { 0, 0, 1, 2, 4, 4, 5, 6, 2, 2, 3, 8, 6, 6, 7, 12 };
849     int v_dist = fieldmv ? 1 : 4; // vertical offset for lower sub-blocks
850     int v_edge_pos = s->v_edge_pos >> 1;
851     int use_ic;
852     int interlace;
853     int uvlinesize;
854     uint8_t (*lutuv)[256];
855
856     if (CONFIG_GRAY && s->avctx->flags & AV_CODEC_FLAG_GRAY)
857         return;
858
859     uvlinesize = s->current_picture_ptr->f->linesize[1];
860
861     for (i = 0; i < 4; i++) {
862         int d = i < 2 ? dir: dir2;
863         tx = s->mv[d][i][0];
864         uvmx_field[i] = (tx + ((tx & 3) == 3)) >> 1;
865         ty = s->mv[d][i][1];
866         if (fieldmv)
867             uvmy_field[i] = (ty >> 4) * 8 + s_rndtblfield[ty & 0xF];
868         else
869             uvmy_field[i] = (ty + ((ty & 3) == 3)) >> 1;
870     }
871
872     for (i = 0; i < 4; i++) {
873         off = (i & 1) * 4 + ((i & 2) ? v_dist * s->uvlinesize : 0);
874         uvsrc_x = s->mb_x * 8 +  (i & 1) * 4           + (uvmx_field[i] >> 2);
875         uvsrc_y = s->mb_y * 8 + ((i & 2) ? v_dist : 0) + (uvmy_field[i] >> 2);
876         // FIXME: implement proper pull-back (see vc1cropmv.c, vc1CROPMV_ChromaPullBack())
877         uvsrc_x = av_clip(uvsrc_x, -8, s->avctx->coded_width  >> 1);
878         if (v->fcm == ILACE_FRAME)
879             uvsrc_y = av_clip(uvsrc_y, -8 + (uvsrc_y & 1), (s->avctx->coded_height >> 1) + (uvsrc_y & 1));
880         else
881             uvsrc_y = av_clip(uvsrc_y, -8, s->avctx->coded_height >> 1);
882         if (i < 2 ? dir : dir2) {
883             srcU = s->next_picture.f->data[1];
884             srcV = s->next_picture.f->data[2];
885             lutuv  = v->next_lutuv;
886             use_ic = v->next_use_ic;
887             interlace = s->next_picture.f->interlaced_frame;
888         } else {
889             srcU = s->last_picture.f->data[1];
890             srcV = s->last_picture.f->data[2];
891             lutuv  = v->last_lutuv;
892             use_ic = v->last_use_ic;
893             interlace = s->last_picture.f->interlaced_frame;
894         }
895         if (!srcU)
896             return;
897         srcU += uvsrc_y * s->uvlinesize + uvsrc_x;
898         srcV += uvsrc_y * s->uvlinesize + uvsrc_x;
899         uvmx_field[i] = (uvmx_field[i] & 3) << 1;
900         uvmy_field[i] = (uvmy_field[i] & 3) << 1;
901
902         if (use_ic
903             || s->h_edge_pos < 10 || v_edge_pos < (5 << fieldmv)
904             || (unsigned)uvsrc_x > (s->h_edge_pos >> 1) - 5
905             || (unsigned)uvsrc_y > v_edge_pos - (5 << fieldmv)) {
906             if (interlace) {
907                 s->vdsp.emulated_edge_mc(s->sc.edge_emu_buffer,
908                                          srcU,
909                                          uvlinesize << 1,
910                                          uvlinesize << 1,
911                                          5,
912                                          (5 << fieldmv) + 1 >> 1,
913                                          uvsrc_x,
914                                          uvsrc_y >> 1,
915                                          s->h_edge_pos >> 1,
916                                          s->v_edge_pos >> 2);
917                 s->vdsp.emulated_edge_mc(s->sc.edge_emu_buffer + 16,
918                                          srcV,
919                                          uvlinesize << 1,
920                                          uvlinesize << 1,
921                                          5,
922                                          (5 << fieldmv) + 1 >> 1,
923                                          uvsrc_x,
924                                          uvsrc_y >> 1,
925                                          s->h_edge_pos >> 1,
926                                          s->v_edge_pos >> 2);
927                 if (!fieldmv) {
928                     s->vdsp.emulated_edge_mc(s->sc.edge_emu_buffer + uvlinesize,
929                                              srcU + uvlinesize,
930                                              uvlinesize << 1,
931                                              uvlinesize << 1,
932                                              5,
933                                              2,
934                                              uvsrc_x,
935                                              uvsrc_y + 1 >> 1,
936                                              s->h_edge_pos >> 1,
937                                              s->v_edge_pos >> 2);
938                     s->vdsp.emulated_edge_mc(s->sc.edge_emu_buffer + 16 + uvlinesize,
939                                              srcV + uvlinesize,
940                                              uvlinesize << 1,
941                                              uvlinesize << 1,
942                                              5,
943                                              2,
944                                              uvsrc_x,
945                                              uvsrc_y + 1 >> 1,
946                                              s->h_edge_pos >> 1,
947                                              s->v_edge_pos >> 2);
948                 }
949             } else {
950                 s->vdsp.emulated_edge_mc(s->sc.edge_emu_buffer,
951                                          srcU,
952                                          uvlinesize,
953                                          uvlinesize,
954                                          5,
955                                          5 << fieldmv,
956                                          uvsrc_x,
957                                          uvsrc_y,
958                                          s->h_edge_pos >> 1,
959                                          s->v_edge_pos >> 1);
960                 s->vdsp.emulated_edge_mc(s->sc.edge_emu_buffer + 16,
961                                          srcV,
962                                          uvlinesize,
963                                          uvlinesize,
964                                          5,
965                                          5 << fieldmv,
966                                          uvsrc_x,
967                                          uvsrc_y,
968                                          s->h_edge_pos >> 1,
969                                          s->v_edge_pos >> 1);
970             }
971             srcU = s->sc.edge_emu_buffer;
972             srcV = s->sc.edge_emu_buffer + 16;
973
974             /* if we deal with intensity compensation we need to scale source blocks */
975             if (use_ic) {
976                 vc1_lut_scale_chroma(srcU, srcV,
977                                      lutuv[(uvsrc_y + (0 << fieldmv)) & 1],
978                                      lutuv[(uvsrc_y + (1 << fieldmv)) & 1],
979                                      5, s->uvlinesize << fieldmv);
980             }
981         }
982         if (avg) {
983             if (!v->rnd) {
984                 h264chroma->avg_h264_chroma_pixels_tab[1](s->dest[1] + off, srcU, s->uvlinesize << fieldmv, 4, uvmx_field[i], uvmy_field[i]);
985                 h264chroma->avg_h264_chroma_pixels_tab[1](s->dest[2] + off, srcV, s->uvlinesize << fieldmv, 4, uvmx_field[i], uvmy_field[i]);
986             } else {
987                 v->vc1dsp.avg_no_rnd_vc1_chroma_pixels_tab[1](s->dest[1] + off, srcU, s->uvlinesize << fieldmv, 4, uvmx_field[i], uvmy_field[i]);
988                 v->vc1dsp.avg_no_rnd_vc1_chroma_pixels_tab[1](s->dest[2] + off, srcV, s->uvlinesize << fieldmv, 4, uvmx_field[i], uvmy_field[i]);
989             }
990         } else {
991             if (!v->rnd) {
992                 h264chroma->put_h264_chroma_pixels_tab[1](s->dest[1] + off, srcU, s->uvlinesize << fieldmv, 4, uvmx_field[i], uvmy_field[i]);
993                 h264chroma->put_h264_chroma_pixels_tab[1](s->dest[2] + off, srcV, s->uvlinesize << fieldmv, 4, uvmx_field[i], uvmy_field[i]);
994             } else {
995                 v->vc1dsp.put_no_rnd_vc1_chroma_pixels_tab[1](s->dest[1] + off, srcU, s->uvlinesize << fieldmv, 4, uvmx_field[i], uvmy_field[i]);
996                 v->vc1dsp.put_no_rnd_vc1_chroma_pixels_tab[1](s->dest[2] + off, srcV, s->uvlinesize << fieldmv, 4, uvmx_field[i], uvmy_field[i]);
997             }
998         }
999     }
1000 }
1001
1002 /** Motion compensation for direct or interpolated blocks in B-frames
1003  */
1004 void ff_vc1_interp_mc(VC1Context *v)
1005 {
1006     MpegEncContext *s = &v->s;
1007     H264ChromaContext *h264chroma = &v->h264chroma;
1008     uint8_t *srcY, *srcU, *srcV;
1009     int dxy, mx, my, uvmx, uvmy, src_x, src_y, uvsrc_x, uvsrc_y;
1010     int v_edge_pos = s->v_edge_pos >> v->field_mode;
1011     int use_ic = v->next_use_ic;
1012     int interlace;
1013     int linesize, uvlinesize;
1014
1015     if (!v->field_mode && !v->s.next_picture.f->data[0])
1016         return;
1017
1018     linesize = s->current_picture_ptr->f->linesize[0];
1019     uvlinesize = s->current_picture_ptr->f->linesize[1];
1020
1021     mx   = s->mv[1][0][0];
1022     my   = s->mv[1][0][1];
1023     uvmx = (mx + ((mx & 3) == 3)) >> 1;
1024     uvmy = (my + ((my & 3) == 3)) >> 1;
1025     if (v->field_mode && v->cur_field_type != v->ref_field_type[1]) {
1026         my   = my   - 2 + 4 * v->cur_field_type;
1027         uvmy = uvmy - 2 + 4 * v->cur_field_type;
1028     }
1029     if (v->fastuvmc) {
1030         uvmx = uvmx + ((uvmx < 0) ? -(uvmx & 1) : (uvmx & 1));
1031         uvmy = uvmy + ((uvmy < 0) ? -(uvmy & 1) : (uvmy & 1));
1032     }
1033     srcY = s->next_picture.f->data[0];
1034     srcU = s->next_picture.f->data[1];
1035     srcV = s->next_picture.f->data[2];
1036
1037     interlace = s->next_picture.f->interlaced_frame;
1038
1039     src_x   = s->mb_x * 16 + (mx   >> 2);
1040     src_y   = s->mb_y * 16 + (my   >> 2);
1041     uvsrc_x = s->mb_x *  8 + (uvmx >> 2);
1042     uvsrc_y = s->mb_y *  8 + (uvmy >> 2);
1043
1044     if (v->profile != PROFILE_ADVANCED) {
1045         src_x   = av_clip(  src_x, -16, s->mb_width  * 16);
1046         src_y   = av_clip(  src_y, -16, s->mb_height * 16);
1047         uvsrc_x = av_clip(uvsrc_x,  -8, s->mb_width  *  8);
1048         uvsrc_y = av_clip(uvsrc_y,  -8, s->mb_height *  8);
1049     } else {
1050         src_x   = av_clip(  src_x, -17, s->avctx->coded_width);
1051         uvsrc_x = av_clip(uvsrc_x,  -8, s->avctx->coded_width  >> 1);
1052         if (v->fcm == ILACE_FRAME) {
1053             src_y = av_clip(src_y, -18 + (src_y & 1), s->avctx->coded_height + (src_y & 1));
1054             uvsrc_y = av_clip(uvsrc_y, -8 + (uvsrc_y & 1), (s->avctx->coded_height >> 1) + (uvsrc_y & 1));
1055         } else {
1056             src_y = av_clip(src_y, -18, s->avctx->coded_height + 1);
1057             uvsrc_y = av_clip(uvsrc_y,  -8, s->avctx->coded_height >> 1);
1058         }
1059     }
1060
1061     srcY += src_y   * s->linesize   + src_x;
1062     srcU += uvsrc_y * s->uvlinesize + uvsrc_x;
1063     srcV += uvsrc_y * s->uvlinesize + uvsrc_x;
1064
1065     if (v->field_mode && v->ref_field_type[1]) {
1066         srcY += linesize;
1067         srcU += uvlinesize;
1068         srcV += uvlinesize;
1069     }
1070
1071     /* for grayscale we should not try to read from unknown area */
1072     if (CONFIG_GRAY && s->avctx->flags & AV_CODEC_FLAG_GRAY) {
1073         srcU = s->sc.edge_emu_buffer + 18 * s->linesize;
1074         srcV = s->sc.edge_emu_buffer + 18 * s->linesize;
1075     }
1076
1077     if (v->rangeredfrm || s->h_edge_pos < 22 || v_edge_pos < 22 || use_ic
1078         || (unsigned)(src_x - 1) > s->h_edge_pos - (mx & 3) - 16 - 3
1079         || (unsigned)(src_y - 1) > v_edge_pos    - (my & 3) - 16 - 3) {
1080         uint8_t *ubuf = s->sc.edge_emu_buffer + 19 * s->linesize;
1081         uint8_t *vbuf = ubuf + 9 * s->uvlinesize;
1082         const int k = 17 + s->mspel * 2;
1083
1084         srcY -= s->mspel * (1 + s->linesize);
1085         if (interlace) {
1086             s->vdsp.emulated_edge_mc(s->sc.edge_emu_buffer,
1087                                      srcY,
1088                                      linesize << 1,
1089                                      linesize << 1,
1090                                      k,
1091                                      v->field_mode ? k : (k + 1 >> 1),
1092                                      src_x - s->mspel,
1093                                      src_y - s->mspel >> !v->field_mode,
1094                                      s->h_edge_pos,
1095                                      s->v_edge_pos >> 1);
1096             if (!v->field_mode)
1097                 s->vdsp.emulated_edge_mc(s->sc.edge_emu_buffer + linesize,
1098                                          srcY + linesize,
1099                                          linesize << 1,
1100                                          linesize << 1,
1101                                          k,
1102                                          k >> 1,
1103                                          src_x - s->mspel,
1104                                          src_y - s->mspel + 1 >> 1,
1105                                          s->h_edge_pos,
1106                                          s->v_edge_pos >> 1);
1107         } else
1108             s->vdsp.emulated_edge_mc(s->sc.edge_emu_buffer,
1109                                      srcY,
1110                                      linesize,
1111                                      linesize,
1112                                      k,
1113                                      v->field_mode ? (k << 1) - 1 : k,
1114                                      src_x - s->mspel,
1115                                      v->field_mode ? 2 * (src_y - s->mspel) + v->ref_field_type[1] :
1116                                                      src_y - s->mspel,
1117                                      s->h_edge_pos,
1118                                      s->v_edge_pos);
1119         srcY = s->sc.edge_emu_buffer;
1120         if (interlace) {
1121             s->vdsp.emulated_edge_mc(ubuf,
1122                                      srcU,
1123                                      uvlinesize << 1,
1124                                      uvlinesize << 1,
1125                                      9,
1126                                      v->field_mode ? 9 : 5,
1127                                      uvsrc_x,
1128                                      uvsrc_y >> !v->field_mode,
1129                                      s->h_edge_pos >> 1,
1130                                      s->v_edge_pos >> 2);
1131             s->vdsp.emulated_edge_mc(vbuf,
1132                                      srcV,
1133                                      uvlinesize << 1,
1134                                      uvlinesize << 1,
1135                                      9,
1136                                      v->field_mode ? 9 : 5,
1137                                      uvsrc_x,
1138                                      uvsrc_y >> !v->field_mode,
1139                                      s->h_edge_pos >> 1,
1140                                      s->v_edge_pos >> 2);
1141             if (!v->field_mode) {
1142                 s->vdsp.emulated_edge_mc(ubuf + uvlinesize,
1143                                          srcU + uvlinesize,
1144                                          uvlinesize << 1,
1145                                          uvlinesize << 1,
1146                                          9,
1147                                          4,
1148                                          uvsrc_x,
1149                                          uvsrc_y + 1 >> 1,
1150                                          s->h_edge_pos >> 1,
1151                                          s->v_edge_pos >> 2);
1152                 s->vdsp.emulated_edge_mc(vbuf + uvlinesize,
1153                                          srcV + uvlinesize,
1154                                          uvlinesize << 1,
1155                                          uvlinesize << 1,
1156                                          9,
1157                                          4,
1158                                          uvsrc_x,
1159                                          uvsrc_y + 1 >> 1,
1160                                          s->h_edge_pos >> 1,
1161                                          s->v_edge_pos >> 2);
1162             }
1163         } else {
1164             s->vdsp.emulated_edge_mc(ubuf,
1165                                      srcU,
1166                                      uvlinesize,
1167                                      uvlinesize,
1168                                      9,
1169                                      v->field_mode ? 17 : 9,
1170                                      uvsrc_x,
1171                                      v->field_mode ? 2 * uvsrc_y + v->ref_field_type[1] : uvsrc_y,
1172                                      s->h_edge_pos >> 1,
1173                                      s->v_edge_pos >> 1);
1174             s->vdsp.emulated_edge_mc(vbuf,
1175                                      srcV,
1176                                      uvlinesize,
1177                                      uvlinesize,
1178                                      9,
1179                                      v->field_mode ? 17 : 9,
1180                                      uvsrc_x,
1181                                      v->field_mode ? 2 * uvsrc_y + v->ref_field_type[1] : uvsrc_y,
1182                                      s->h_edge_pos >> 1,
1183                                      s->v_edge_pos >> 1);
1184         }
1185         srcU = ubuf;
1186         srcV = vbuf;
1187         /* if we deal with range reduction we need to scale source blocks */
1188         if (v->rangeredfrm) {
1189             vc1_scale_luma(srcY, k, s->linesize);
1190             vc1_scale_chroma(srcU, srcV, 9, s->uvlinesize);
1191         }
1192
1193         if (use_ic) {
1194             uint8_t (*luty )[256] = v->next_luty;
1195             uint8_t (*lutuv)[256] = v->next_lutuv;
1196             vc1_lut_scale_luma(srcY,
1197                                luty[v->field_mode ? v->ref_field_type[1] : ((0+src_y - s->mspel) & 1)],
1198                                luty[v->field_mode ? v->ref_field_type[1] : ((1+src_y - s->mspel) & 1)],
1199                                k, s->linesize);
1200             vc1_lut_scale_chroma(srcU, srcV,
1201                                  lutuv[v->field_mode ? v->ref_field_type[1] : ((0+uvsrc_y) & 1)],
1202                                  lutuv[v->field_mode ? v->ref_field_type[1] : ((1+uvsrc_y) & 1)],
1203                                  9, s->uvlinesize);
1204         }
1205         srcY += s->mspel * (1 + s->linesize);
1206     }
1207
1208     if (s->mspel) {
1209         dxy = ((my & 3) << 2) | (mx & 3);
1210         v->vc1dsp.avg_vc1_mspel_pixels_tab[0][dxy](s->dest[0], srcY, s->linesize, v->rnd);
1211     } else { // hpel mc
1212         dxy = (my & 2) | ((mx & 2) >> 1);
1213
1214         if (!v->rnd)
1215             s->hdsp.avg_pixels_tab[0][dxy](s->dest[0], srcY, s->linesize, 16);
1216         else
1217             s->hdsp.avg_no_rnd_pixels_tab[dxy](s->dest[0], srcY, s->linesize, 16);
1218     }
1219
1220     if (CONFIG_GRAY && s->avctx->flags & AV_CODEC_FLAG_GRAY)
1221         return;
1222     /* Chroma MC always uses qpel bilinear */
1223     uvmx = (uvmx & 3) << 1;
1224     uvmy = (uvmy & 3) << 1;
1225     if (!v->rnd) {
1226         h264chroma->avg_h264_chroma_pixels_tab[0](s->dest[1], srcU, s->uvlinesize, 8, uvmx, uvmy);
1227         h264chroma->avg_h264_chroma_pixels_tab[0](s->dest[2], srcV, s->uvlinesize, 8, uvmx, uvmy);
1228     } else {
1229         v->vc1dsp.avg_no_rnd_vc1_chroma_pixels_tab[0](s->dest[1], srcU, s->uvlinesize, 8, uvmx, uvmy);
1230         v->vc1dsp.avg_no_rnd_vc1_chroma_pixels_tab[0](s->dest[2], srcV, s->uvlinesize, 8, uvmx, uvmy);
1231     }
1232 }