2 * Chinese AVS video (AVS1-P2, JiZhun profile) decoder.
3 * Copyright (c) 2006 Stefan Gehrer <stefan.gehrer@gmx.de>
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24 * Chinese AVS video (AVS1-P2, JiZhun profile) decoder
25 * @author Stefan Gehrer <stefan.gehrer@gmx.de>
34 static const uint8_t alpha_tab[64] = {
35 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 2, 2, 2, 3, 3,
36 4, 4, 5, 5, 6, 7, 8, 9, 10, 11, 12, 13, 15, 16, 18, 20,
37 22, 24, 26, 28, 30, 33, 33, 35, 35, 36, 37, 37, 39, 39, 42, 44,
38 46, 48, 50, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64
41 static const uint8_t beta_tab[64] = {
42 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2,
43 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, 6, 6,
44 6, 7, 7, 7, 8, 8, 8, 9, 9, 10, 10, 11, 11, 12, 13, 14,
45 15, 16, 17, 18, 19, 20, 21, 22, 23, 23, 24, 24, 25, 25, 26, 27
48 static const uint8_t tc_tab[64] = {
49 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
50 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2,
51 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4,
52 5, 5, 5, 6, 6, 6, 7, 7, 7, 7, 8, 8, 8, 9, 9, 9
55 /** mark block as unavailable, i.e. out of picture
57 static const cavs_vector un_mv = { 0, 0, 1, NOT_AVAIL };
59 static const int8_t left_modifier_l[8] = { 0, -1, 6, -1, -1, 7, 6, 7 };
60 static const int8_t top_modifier_l[8] = { -1, 1, 5, -1, -1, 5, 7, 7 };
61 static const int8_t left_modifier_c[7] = { 5, -1, 2, -1, 6, 5, 6 };
62 static const int8_t top_modifier_c[7] = { 4, 1, -1, -1, 4, 6, 6 };
64 /*****************************************************************************
66 * in-loop deblocking filter
68 ****************************************************************************/
70 static inline int get_bs(cavs_vector *mvP, cavs_vector *mvQ, int b) {
71 if((mvP->ref == REF_INTRA) || (mvQ->ref == REF_INTRA))
73 if( (abs(mvP->x - mvQ->x) >= 4) || (abs(mvP->y - mvQ->y) >= 4) )
78 if( (abs(mvP->x - mvQ->x) >= 4) || (abs(mvP->y - mvQ->y) >= 4) )
81 if(mvP->ref != mvQ->ref)
88 alpha = alpha_tab[av_clip(qp_avg + h->alpha_offset,0,63)]; \
89 beta = beta_tab[av_clip(qp_avg + h->beta_offset, 0,63)]; \
90 tc = tc_tab[av_clip(qp_avg + h->alpha_offset,0,63)];
93 * in-loop deblocking filter for a single macroblock
95 * boundary strength (bs) mapping:
104 void ff_cavs_filter(AVSContext *h, enum cavs_mb mb_type) {
106 int qp_avg, alpha, beta, tc;
109 /* save un-deblocked lines */
110 h->topleft_border_y = h->top_border_y[h->mbx*16+15];
111 h->topleft_border_u = h->top_border_u[h->mbx*10+8];
112 h->topleft_border_v = h->top_border_v[h->mbx*10+8];
113 memcpy(&h->top_border_y[h->mbx*16], h->cy + 15* h->l_stride,16);
114 memcpy(&h->top_border_u[h->mbx*10+1], h->cu + 7* h->c_stride,8);
115 memcpy(&h->top_border_v[h->mbx*10+1], h->cv + 7* h->c_stride,8);
117 h->left_border_y[i*2+1] = *(h->cy + 15 + (i*2+0)*h->l_stride);
118 h->left_border_y[i*2+2] = *(h->cy + 15 + (i*2+1)*h->l_stride);
119 h->left_border_u[i+1] = *(h->cu + 7 + i*h->c_stride);
120 h->left_border_v[i+1] = *(h->cv + 7 + i*h->c_stride);
122 if(!h->loop_filter_disable) {
128 if(ff_cavs_partition_flags[mb_type] & SPLITV){
129 bs[2] = get_bs(&h->mv[MV_FWD_X0], &h->mv[MV_FWD_X1], mb_type > P_8X8);
130 bs[3] = get_bs(&h->mv[MV_FWD_X2], &h->mv[MV_FWD_X3], mb_type > P_8X8);
132 if(ff_cavs_partition_flags[mb_type] & SPLITH){
133 bs[6] = get_bs(&h->mv[MV_FWD_X0], &h->mv[MV_FWD_X2], mb_type > P_8X8);
134 bs[7] = get_bs(&h->mv[MV_FWD_X1], &h->mv[MV_FWD_X3], mb_type > P_8X8);
136 bs[0] = get_bs(&h->mv[MV_FWD_A1], &h->mv[MV_FWD_X0], mb_type > P_8X8);
137 bs[1] = get_bs(&h->mv[MV_FWD_A3], &h->mv[MV_FWD_X2], mb_type > P_8X8);
138 bs[4] = get_bs(&h->mv[MV_FWD_B2], &h->mv[MV_FWD_X0], mb_type > P_8X8);
139 bs[5] = get_bs(&h->mv[MV_FWD_B3], &h->mv[MV_FWD_X1], mb_type > P_8X8);
142 if(h->flags & A_AVAIL) {
143 qp_avg = (h->qp + h->left_qp + 1) >> 1;
145 h->cdsp.cavs_filter_lv(h->cy,h->l_stride,alpha,beta,tc,bs[0],bs[1]);
146 h->cdsp.cavs_filter_cv(h->cu,h->c_stride,alpha,beta,tc,bs[0],bs[1]);
147 h->cdsp.cavs_filter_cv(h->cv,h->c_stride,alpha,beta,tc,bs[0],bs[1]);
151 h->cdsp.cavs_filter_lv(h->cy + 8,h->l_stride,alpha,beta,tc,bs[2],bs[3]);
152 h->cdsp.cavs_filter_lh(h->cy + 8*h->l_stride,h->l_stride,alpha,beta,tc,
155 if(h->flags & B_AVAIL) {
156 qp_avg = (h->qp + h->top_qp[h->mbx] + 1) >> 1;
158 h->cdsp.cavs_filter_lh(h->cy,h->l_stride,alpha,beta,tc,bs[4],bs[5]);
159 h->cdsp.cavs_filter_ch(h->cu,h->c_stride,alpha,beta,tc,bs[4],bs[5]);
160 h->cdsp.cavs_filter_ch(h->cv,h->c_stride,alpha,beta,tc,bs[4],bs[5]);
165 h->top_qp[h->mbx] = h->qp;
170 /*****************************************************************************
172 * spatial intra prediction
174 ****************************************************************************/
176 void ff_cavs_load_intra_pred_luma(AVSContext *h, uint8_t *top,
177 uint8_t **left, int block) {
182 *left = h->left_border_y;
183 h->left_border_y[0] = h->left_border_y[1];
184 memset(&h->left_border_y[17],h->left_border_y[16],9);
185 memcpy(&top[1],&h->top_border_y[h->mbx*16],16);
188 if((h->flags & A_AVAIL) && (h->flags & B_AVAIL))
189 h->left_border_y[0] = top[0] = h->topleft_border_y;
192 *left = h->intern_border_y;
194 h->intern_border_y[i+1] = *(h->cy + 7 + i*h->l_stride);
195 memset(&h->intern_border_y[9],h->intern_border_y[8],9);
196 h->intern_border_y[0] = h->intern_border_y[1];
197 memcpy(&top[1],&h->top_border_y[h->mbx*16+8],8);
198 if(h->flags & C_AVAIL)
199 memcpy(&top[9],&h->top_border_y[(h->mbx + 1)*16],8);
201 memset(&top[9],top[8],9);
204 if(h->flags & B_AVAIL)
205 h->intern_border_y[0] = top[0] = h->top_border_y[h->mbx*16+7];
208 *left = &h->left_border_y[8];
209 memcpy(&top[1],h->cy + 7*h->l_stride,16);
212 if(h->flags & A_AVAIL)
213 top[0] = h->left_border_y[8];
216 *left = &h->intern_border_y[8];
218 h->intern_border_y[i+9] = *(h->cy + 7 + (i+8)*h->l_stride);
219 memset(&h->intern_border_y[17],h->intern_border_y[16],9);
220 memcpy(&top[0],h->cy + 7 + 7*h->l_stride,9);
221 memset(&top[9],top[8],9);
226 void ff_cavs_load_intra_pred_chroma(AVSContext *h) {
227 /* extend borders by one pixel */
228 h->left_border_u[9] = h->left_border_u[8];
229 h->left_border_v[9] = h->left_border_v[8];
230 h->top_border_u[h->mbx*10+9] = h->top_border_u[h->mbx*10+8];
231 h->top_border_v[h->mbx*10+9] = h->top_border_v[h->mbx*10+8];
232 if(h->mbx && h->mby) {
233 h->top_border_u[h->mbx*10] = h->left_border_u[0] = h->topleft_border_u;
234 h->top_border_v[h->mbx*10] = h->left_border_v[0] = h->topleft_border_v;
236 h->left_border_u[0] = h->left_border_u[1];
237 h->left_border_v[0] = h->left_border_v[1];
238 h->top_border_u[h->mbx*10] = h->top_border_u[h->mbx*10+1];
239 h->top_border_v[h->mbx*10] = h->top_border_v[h->mbx*10+1];
243 static void intra_pred_vert(uint8_t *d,uint8_t *top,uint8_t *left,int stride) {
245 uint64_t a = AV_RN64(&top[1]);
247 *((uint64_t *)(d+y*stride)) = a;
251 static void intra_pred_horiz(uint8_t *d,uint8_t *top,uint8_t *left,int stride) {
255 a = left[y+1] * 0x0101010101010101ULL;
256 *((uint64_t *)(d+y*stride)) = a;
260 static void intra_pred_dc_128(uint8_t *d,uint8_t *top,uint8_t *left,int stride) {
262 uint64_t a = 0x8080808080808080ULL;
264 *((uint64_t *)(d+y*stride)) = a;
267 static void intra_pred_plane(uint8_t *d,uint8_t *top,uint8_t *left,int stride) {
271 uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
274 ih += (x+1)*(top[5+x]-top[3-x]);
275 iv += (x+1)*(left[5+x]-left[3-x]);
277 ia = (top[8]+left[8])<<4;
282 d[y*stride+x] = cm[(ia+(x-3)*ih+(y-3)*iv+16)>>5];
285 #define LOWPASS(ARRAY,INDEX) \
286 (( ARRAY[(INDEX)-1] + 2*ARRAY[(INDEX)] + ARRAY[(INDEX)+1] + 2) >> 2)
288 static void intra_pred_lp(uint8_t *d,uint8_t *top,uint8_t *left,int stride) {
292 d[y*stride+x] = (LOWPASS(top,x+1) + LOWPASS(left,y+1)) >> 1;
295 static void intra_pred_down_left(uint8_t *d,uint8_t *top,uint8_t *left,int stride) {
299 d[y*stride+x] = (LOWPASS(top,x+y+2) + LOWPASS(left,x+y+2)) >> 1;
302 static void intra_pred_down_right(uint8_t *d,uint8_t *top,uint8_t *left,int stride) {
307 d[y*stride+x] = (left[1]+2*top[0]+top[1]+2)>>2;
309 d[y*stride+x] = LOWPASS(top,x-y);
311 d[y*stride+x] = LOWPASS(left,y-x);
314 static void intra_pred_lp_left(uint8_t *d,uint8_t *top,uint8_t *left,int stride) {
318 d[y*stride+x] = LOWPASS(left,y+1);
321 static void intra_pred_lp_top(uint8_t *d,uint8_t *top,uint8_t *left,int stride) {
325 d[y*stride+x] = LOWPASS(top,x+1);
330 static inline void modify_pred(const int8_t *mod_table, int *mode)
332 *mode = mod_table[*mode];
334 av_log(NULL, AV_LOG_ERROR, "Illegal intra prediction mode\n");
339 void ff_cavs_modify_mb_i(AVSContext *h, int *pred_mode_uv) {
340 /* save pred modes before they get modified */
341 h->pred_mode_Y[3] = h->pred_mode_Y[5];
342 h->pred_mode_Y[6] = h->pred_mode_Y[8];
343 h->top_pred_Y[h->mbx*2+0] = h->pred_mode_Y[7];
344 h->top_pred_Y[h->mbx*2+1] = h->pred_mode_Y[8];
346 /* modify pred modes according to availability of neighbour samples */
347 if(!(h->flags & A_AVAIL)) {
348 modify_pred(left_modifier_l, &h->pred_mode_Y[4]);
349 modify_pred(left_modifier_l, &h->pred_mode_Y[7]);
350 modify_pred(left_modifier_c, pred_mode_uv);
352 if(!(h->flags & B_AVAIL)) {
353 modify_pred(top_modifier_l, &h->pred_mode_Y[4]);
354 modify_pred(top_modifier_l, &h->pred_mode_Y[5]);
355 modify_pred(top_modifier_c, pred_mode_uv);
359 /*****************************************************************************
361 * motion compensation
363 ****************************************************************************/
365 static inline void mc_dir_part(AVSContext *h,Picture *pic,
366 int chroma_height,int delta,int list,uint8_t *dest_y,
367 uint8_t *dest_cb,uint8_t *dest_cr,int src_x_offset,
368 int src_y_offset,qpel_mc_func *qpix_op,
369 h264_chroma_mc_func chroma_op,cavs_vector *mv)
371 MpegEncContext * const s = &h->s;
372 const int mx= mv->x + src_x_offset*8;
373 const int my= mv->y + src_y_offset*8;
374 const int luma_xy= (mx&3) + ((my&3)<<2);
375 uint8_t * src_y = pic->f.data[0] + (mx >> 2) + (my >> 2) * h->l_stride;
376 uint8_t * src_cb = pic->f.data[1] + (mx >> 3) + (my >> 3) * h->c_stride;
377 uint8_t * src_cr = pic->f.data[2] + (mx >> 3) + (my >> 3) * h->c_stride;
378 int extra_width= 0; //(s->flags&CODEC_FLAG_EMU_EDGE) ? 0 : 16;
379 int extra_height= extra_width;
381 const int full_mx= mx>>2;
382 const int full_my= my>>2;
383 const int pic_width = 16*h->mb_width;
384 const int pic_height = 16*h->mb_height;
388 if(mx&7) extra_width -= 3;
389 if(my&7) extra_height -= 3;
391 if( full_mx < 0-extra_width
392 || full_my < 0-extra_height
393 || full_mx + 16/*FIXME*/ > pic_width + extra_width
394 || full_my + 16/*FIXME*/ > pic_height + extra_height){
395 s->dsp.emulated_edge_mc(s->edge_emu_buffer, src_y - 2 - 2*h->l_stride, h->l_stride,
396 16+5, 16+5/*FIXME*/, full_mx-2, full_my-2, pic_width, pic_height);
397 src_y= s->edge_emu_buffer + 2 + 2*h->l_stride;
401 qpix_op[luma_xy](dest_y, src_y, h->l_stride); //FIXME try variable height perhaps?
404 s->dsp.emulated_edge_mc(s->edge_emu_buffer, src_cb, h->c_stride,
405 9, 9/*FIXME*/, (mx>>3), (my>>3), pic_width>>1, pic_height>>1);
406 src_cb= s->edge_emu_buffer;
408 chroma_op(dest_cb, src_cb, h->c_stride, chroma_height, mx&7, my&7);
411 s->dsp.emulated_edge_mc(s->edge_emu_buffer, src_cr, h->c_stride,
412 9, 9/*FIXME*/, (mx>>3), (my>>3), pic_width>>1, pic_height>>1);
413 src_cr= s->edge_emu_buffer;
415 chroma_op(dest_cr, src_cr, h->c_stride, chroma_height, mx&7, my&7);
418 static inline void mc_part_std(AVSContext *h,int chroma_height,int delta,
419 uint8_t *dest_y,uint8_t *dest_cb,uint8_t *dest_cr,
420 int x_offset, int y_offset,qpel_mc_func *qpix_put,
421 h264_chroma_mc_func chroma_put,qpel_mc_func *qpix_avg,
422 h264_chroma_mc_func chroma_avg, cavs_vector *mv)
424 qpel_mc_func *qpix_op= qpix_put;
425 h264_chroma_mc_func chroma_op= chroma_put;
427 dest_y += 2*x_offset + 2*y_offset*h->l_stride;
428 dest_cb += x_offset + y_offset*h->c_stride;
429 dest_cr += x_offset + y_offset*h->c_stride;
430 x_offset += 8*h->mbx;
431 y_offset += 8*h->mby;
434 Picture *ref= &h->DPB[mv->ref];
435 mc_dir_part(h, ref, chroma_height, delta, 0,
436 dest_y, dest_cb, dest_cr, x_offset, y_offset,
437 qpix_op, chroma_op, mv);
440 chroma_op= chroma_avg;
443 if((mv+MV_BWD_OFFS)->ref >= 0){
444 Picture *ref= &h->DPB[0];
445 mc_dir_part(h, ref, chroma_height, delta, 1,
446 dest_y, dest_cb, dest_cr, x_offset, y_offset,
447 qpix_op, chroma_op, mv+MV_BWD_OFFS);
451 void ff_cavs_inter(AVSContext *h, enum cavs_mb mb_type) {
452 if(ff_cavs_partition_flags[mb_type] == 0){ // 16x16
453 mc_part_std(h, 8, 0, h->cy, h->cu, h->cv, 0, 0,
454 h->cdsp.put_cavs_qpel_pixels_tab[0],
455 h->s.dsp.put_h264_chroma_pixels_tab[0],
456 h->cdsp.avg_cavs_qpel_pixels_tab[0],
457 h->s.dsp.avg_h264_chroma_pixels_tab[0],&h->mv[MV_FWD_X0]);
459 mc_part_std(h, 4, 0, h->cy, h->cu, h->cv, 0, 0,
460 h->cdsp.put_cavs_qpel_pixels_tab[1],
461 h->s.dsp.put_h264_chroma_pixels_tab[1],
462 h->cdsp.avg_cavs_qpel_pixels_tab[1],
463 h->s.dsp.avg_h264_chroma_pixels_tab[1],&h->mv[MV_FWD_X0]);
464 mc_part_std(h, 4, 0, h->cy, h->cu, h->cv, 4, 0,
465 h->cdsp.put_cavs_qpel_pixels_tab[1],
466 h->s.dsp.put_h264_chroma_pixels_tab[1],
467 h->cdsp.avg_cavs_qpel_pixels_tab[1],
468 h->s.dsp.avg_h264_chroma_pixels_tab[1],&h->mv[MV_FWD_X1]);
469 mc_part_std(h, 4, 0, h->cy, h->cu, h->cv, 0, 4,
470 h->cdsp.put_cavs_qpel_pixels_tab[1],
471 h->s.dsp.put_h264_chroma_pixels_tab[1],
472 h->cdsp.avg_cavs_qpel_pixels_tab[1],
473 h->s.dsp.avg_h264_chroma_pixels_tab[1],&h->mv[MV_FWD_X2]);
474 mc_part_std(h, 4, 0, h->cy, h->cu, h->cv, 4, 4,
475 h->cdsp.put_cavs_qpel_pixels_tab[1],
476 h->s.dsp.put_h264_chroma_pixels_tab[1],
477 h->cdsp.avg_cavs_qpel_pixels_tab[1],
478 h->s.dsp.avg_h264_chroma_pixels_tab[1],&h->mv[MV_FWD_X3]);
482 /*****************************************************************************
484 * motion vector prediction
486 ****************************************************************************/
488 static inline void scale_mv(AVSContext *h, int *d_x, int *d_y, cavs_vector *src, int distp) {
489 int den = h->scale_den[src->ref];
491 *d_x = (src->x*distp*den + 256 + (src->x>>31)) >> 9;
492 *d_y = (src->y*distp*den + 256 + (src->y>>31)) >> 9;
495 static inline void mv_pred_median(AVSContext *h, cavs_vector *mvP,
496 cavs_vector *mvA, cavs_vector *mvB, cavs_vector *mvC) {
497 int ax, ay, bx, by, cx, cy;
498 int len_ab, len_bc, len_ca, len_mid;
500 /* scale candidates according to their temporal span */
501 scale_mv(h, &ax, &ay, mvA, mvP->dist);
502 scale_mv(h, &bx, &by, mvB, mvP->dist);
503 scale_mv(h, &cx, &cy, mvC, mvP->dist);
504 /* find the geometrical median of the three candidates */
505 len_ab = abs(ax - bx) + abs(ay - by);
506 len_bc = abs(bx - cx) + abs(by - cy);
507 len_ca = abs(cx - ax) + abs(cy - ay);
508 len_mid = mid_pred(len_ab, len_bc, len_ca);
509 if(len_mid == len_ab) {
512 } else if(len_mid == len_bc) {
521 void ff_cavs_mv(AVSContext *h, enum cavs_mv_loc nP, enum cavs_mv_loc nC,
522 enum cavs_mv_pred mode, enum cavs_block size, int ref) {
523 cavs_vector *mvP = &h->mv[nP];
524 cavs_vector *mvA = &h->mv[nP-1];
525 cavs_vector *mvB = &h->mv[nP-4];
526 cavs_vector *mvC = &h->mv[nC];
527 const cavs_vector *mvP2 = NULL;
530 mvP->dist = h->dist[mvP->ref];
531 if(mvC->ref == NOT_AVAIL)
532 mvC = &h->mv[nP-5]; // set to top-left (mvD)
533 if((mode == MV_PRED_PSKIP) &&
534 ((mvA->ref == NOT_AVAIL) || (mvB->ref == NOT_AVAIL) ||
535 ((mvA->x | mvA->y | mvA->ref) == 0) ||
536 ((mvB->x | mvB->y | mvB->ref) == 0) )) {
538 /* if there is only one suitable candidate, take it */
539 } else if((mvA->ref >= 0) && (mvB->ref < 0) && (mvC->ref < 0)) {
541 } else if((mvA->ref < 0) && (mvB->ref >= 0) && (mvC->ref < 0)) {
543 } else if((mvA->ref < 0) && (mvB->ref < 0) && (mvC->ref >= 0)) {
545 } else if(mode == MV_PRED_LEFT && mvA->ref == ref){
547 } else if(mode == MV_PRED_TOP && mvB->ref == ref){
549 } else if(mode == MV_PRED_TOPRIGHT && mvC->ref == ref){
556 mv_pred_median(h, mvP, mvA, mvB, mvC);
558 if(mode < MV_PRED_PSKIP) {
559 mvP->x += get_se_golomb(&h->s.gb);
560 mvP->y += get_se_golomb(&h->s.gb);
565 /*****************************************************************************
569 ****************************************************************************/
572 * initialise predictors for motion vectors and intra prediction
574 void ff_cavs_init_mb(AVSContext *h) {
577 /* copy predictors from top line (MB B and C) into cache */
579 h->mv[MV_FWD_B2+i] = h->top_mv[0][h->mbx*2+i];
580 h->mv[MV_BWD_B2+i] = h->top_mv[1][h->mbx*2+i];
582 h->pred_mode_Y[1] = h->top_pred_Y[h->mbx*2+0];
583 h->pred_mode_Y[2] = h->top_pred_Y[h->mbx*2+1];
584 /* clear top predictors if MB B is not available */
585 if(!(h->flags & B_AVAIL)) {
586 h->mv[MV_FWD_B2] = un_mv;
587 h->mv[MV_FWD_B3] = un_mv;
588 h->mv[MV_BWD_B2] = un_mv;
589 h->mv[MV_BWD_B3] = un_mv;
590 h->pred_mode_Y[1] = h->pred_mode_Y[2] = NOT_AVAIL;
591 h->flags &= ~(C_AVAIL|D_AVAIL);
595 if(h->mbx == h->mb_width-1) //MB C not available
596 h->flags &= ~C_AVAIL;
597 /* clear top-right predictors if MB C is not available */
598 if(!(h->flags & C_AVAIL)) {
599 h->mv[MV_FWD_C2] = un_mv;
600 h->mv[MV_BWD_C2] = un_mv;
602 /* clear top-left predictors if MB D is not available */
603 if(!(h->flags & D_AVAIL)) {
604 h->mv[MV_FWD_D3] = un_mv;
605 h->mv[MV_BWD_D3] = un_mv;
610 * save predictors for later macroblocks and increase
612 * @return 0 if end of frame is reached, 1 otherwise
614 int ff_cavs_next_mb(AVSContext *h) {
621 /* copy mvs as predictors to the left */
623 h->mv[i] = h->mv[i+2];
624 /* copy bottom mvs from cache to top line */
625 h->top_mv[0][h->mbx*2+0] = h->mv[MV_FWD_X2];
626 h->top_mv[0][h->mbx*2+1] = h->mv[MV_FWD_X3];
627 h->top_mv[1][h->mbx*2+0] = h->mv[MV_BWD_X2];
628 h->top_mv[1][h->mbx*2+1] = h->mv[MV_BWD_X3];
629 /* next MB address */
632 if(h->mbx == h->mb_width) { //new mb line
633 h->flags = B_AVAIL|C_AVAIL;
634 /* clear left pred_modes */
635 h->pred_mode_Y[3] = h->pred_mode_Y[6] = NOT_AVAIL;
636 /* clear left mv predictors */
641 /* re-calculate sample pointers */
642 h->cy = h->picture.f.data[0] + h->mby * 16 * h->l_stride;
643 h->cu = h->picture.f.data[1] + h->mby * 8 * h->c_stride;
644 h->cv = h->picture.f.data[2] + h->mby * 8 * h->c_stride;
645 if(h->mby == h->mb_height) { //frame end
652 /*****************************************************************************
656 ****************************************************************************/
658 void ff_cavs_init_pic(AVSContext *h) {
661 /* clear some predictors */
664 h->mv[MV_BWD_X0] = ff_cavs_dir_mv;
665 set_mvs(&h->mv[MV_BWD_X0], BLK_16X16);
666 h->mv[MV_FWD_X0] = ff_cavs_dir_mv;
667 set_mvs(&h->mv[MV_FWD_X0], BLK_16X16);
668 h->pred_mode_Y[3] = h->pred_mode_Y[6] = NOT_AVAIL;
669 h->cy = h->picture.f.data[0];
670 h->cu = h->picture.f.data[1];
671 h->cv = h->picture.f.data[2];
672 h->l_stride = h->picture.f.linesize[0];
673 h->c_stride = h->picture.f.linesize[1];
674 h->luma_scan[2] = 8*h->l_stride;
675 h->luma_scan[3] = 8*h->l_stride+8;
676 h->mbx = h->mby = h->mbidx = 0;
680 /*****************************************************************************
682 * headers and interface
684 ****************************************************************************/
687 * some predictions require data from the top-neighbouring macroblock.
688 * this data has to be stored for one complete row of macroblocks
689 * and this storage space is allocated here
691 void ff_cavs_init_top_lines(AVSContext *h) {
692 /* alloc top line of predictors */
693 h->top_qp = av_mallocz( h->mb_width);
694 h->top_mv[0] = av_mallocz((h->mb_width*2+1)*sizeof(cavs_vector));
695 h->top_mv[1] = av_mallocz((h->mb_width*2+1)*sizeof(cavs_vector));
696 h->top_pred_Y = av_mallocz( h->mb_width*2*sizeof(*h->top_pred_Y));
697 h->top_border_y = av_mallocz((h->mb_width+1)*16);
698 h->top_border_u = av_mallocz( h->mb_width * 10);
699 h->top_border_v = av_mallocz( h->mb_width * 10);
701 /* alloc space for co-located MVs and types */
702 h->col_mv = av_mallocz( h->mb_width*h->mb_height*4*sizeof(cavs_vector));
703 h->col_type_base = av_mallocz(h->mb_width*h->mb_height);
704 h->block = av_mallocz(64*sizeof(DCTELEM));
707 av_cold int ff_cavs_init(AVCodecContext *avctx) {
708 AVSContext *h = avctx->priv_data;
709 MpegEncContext * const s = &h->s;
711 ff_MPV_decode_defaults(s);
712 ff_cavsdsp_init(&h->cdsp, avctx);
715 avctx->pix_fmt= AV_PIX_FMT_YUV420P;
719 h->intra_pred_l[ INTRA_L_VERT] = intra_pred_vert;
720 h->intra_pred_l[ INTRA_L_HORIZ] = intra_pred_horiz;
721 h->intra_pred_l[ INTRA_L_LP] = intra_pred_lp;
722 h->intra_pred_l[ INTRA_L_DOWN_LEFT] = intra_pred_down_left;
723 h->intra_pred_l[INTRA_L_DOWN_RIGHT] = intra_pred_down_right;
724 h->intra_pred_l[ INTRA_L_LP_LEFT] = intra_pred_lp_left;
725 h->intra_pred_l[ INTRA_L_LP_TOP] = intra_pred_lp_top;
726 h->intra_pred_l[ INTRA_L_DC_128] = intra_pred_dc_128;
727 h->intra_pred_c[ INTRA_C_LP] = intra_pred_lp;
728 h->intra_pred_c[ INTRA_C_HORIZ] = intra_pred_horiz;
729 h->intra_pred_c[ INTRA_C_VERT] = intra_pred_vert;
730 h->intra_pred_c[ INTRA_C_PLANE] = intra_pred_plane;
731 h->intra_pred_c[ INTRA_C_LP_LEFT] = intra_pred_lp_left;
732 h->intra_pred_c[ INTRA_C_LP_TOP] = intra_pred_lp_top;
733 h->intra_pred_c[ INTRA_C_DC_128] = intra_pred_dc_128;
739 av_cold int ff_cavs_end(AVCodecContext *avctx) {
740 AVSContext *h = avctx->priv_data;
742 ff_MPV_common_end(&h->s);
745 av_free(h->top_mv[0]);
746 av_free(h->top_mv[1]);
747 av_free(h->top_pred_Y);
748 av_free(h->top_border_y);
749 av_free(h->top_border_u);
750 av_free(h->top_border_v);
752 av_free(h->col_type_base);