1/* 2 * Chinese AVS video (AVS1-P2, JiZhun profile) decoder. 3 * Copyright (c) 2006 Stefan Gehrer <stefan.gehrer@gmx.de> 4 * 5 * This file is part of FFmpeg. 6 * 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. 11 * 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. 16 * 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 20 */ 21 22/** 23 * @file 24 * Chinese AVS video (AVS1-P2, JiZhun profile) decoder 25 * @author Stefan Gehrer <stefan.gehrer@gmx.de> 26 */ 27 28#include "avcodec.h" 29#include "get_bits.h" 30#include "golomb.h" 31#include "mathops.h" 32#include "cavs.h" 33#include "cavsdata.h" 34 35/***************************************************************************** 36 * 37 * in-loop deblocking filter 38 * 39 ****************************************************************************/ 40 41static inline int get_bs(cavs_vector *mvP, cavs_vector *mvQ, int b) { 42 if((mvP->ref == REF_INTRA) || (mvQ->ref == REF_INTRA)) 43 return 2; 44 if( (abs(mvP->x - mvQ->x) >= 4) || (abs(mvP->y - mvQ->y) >= 4) ) 45 return 1; 46 if(b){ 47 mvP += MV_BWD_OFFS; 48 mvQ += MV_BWD_OFFS; 49 if( (abs(mvP->x - mvQ->x) >= 4) || (abs(mvP->y - mvQ->y) >= 4) ) 50 return 1; 51 }else{ 52 if(mvP->ref != mvQ->ref) 53 return 1; 54 } 55 return 0; 56} 57 58#define SET_PARAMS \ 59 alpha = alpha_tab[av_clip(qp_avg + h->alpha_offset,0,63)]; \ 60 beta = beta_tab[av_clip(qp_avg + h->beta_offset, 0,63)]; \ 61 tc = tc_tab[av_clip(qp_avg + h->alpha_offset,0,63)]; 62 63/** 64 * in-loop deblocking filter for a single macroblock 65 * 66 * boundary strength (bs) mapping: 67 * 68 * --4---5-- 69 * 0 2 | 70 * | 6 | 7 | 71 * 1 3 | 72 * --------- 73 * 74 */ 75void ff_cavs_filter(AVSContext *h, enum cavs_mb mb_type) { 76 uint8_t bs[8]; 77 int qp_avg, alpha, beta, tc; 78 int i; 79 80 /* save un-deblocked lines */ 81 h->topleft_border_y = h->top_border_y[h->mbx*16+15]; 82 h->topleft_border_u = h->top_border_u[h->mbx*10+8]; 83 h->topleft_border_v = h->top_border_v[h->mbx*10+8]; 84 memcpy(&h->top_border_y[h->mbx*16], h->cy + 15* h->l_stride,16); 85 memcpy(&h->top_border_u[h->mbx*10+1], h->cu + 7* h->c_stride,8); 86 memcpy(&h->top_border_v[h->mbx*10+1], h->cv + 7* h->c_stride,8); 87 for(i=0;i<8;i++) { 88 h->left_border_y[i*2+1] = *(h->cy + 15 + (i*2+0)*h->l_stride); 89 h->left_border_y[i*2+2] = *(h->cy + 15 + (i*2+1)*h->l_stride); 90 h->left_border_u[i+1] = *(h->cu + 7 + i*h->c_stride); 91 h->left_border_v[i+1] = *(h->cv + 7 + i*h->c_stride); 92 } 93 if(!h->loop_filter_disable) { 94 /* determine bs */ 95 if(mb_type == I_8X8) 96 memset(bs,2,8); 97 else{ 98 memset(bs,0,8); 99 if(ff_cavs_partition_flags[mb_type] & SPLITV){ 100 bs[2] = get_bs(&h->mv[MV_FWD_X0], &h->mv[MV_FWD_X1], mb_type > P_8X8); 101 bs[3] = get_bs(&h->mv[MV_FWD_X2], &h->mv[MV_FWD_X3], mb_type > P_8X8); 102 } 103 if(ff_cavs_partition_flags[mb_type] & SPLITH){ 104 bs[6] = get_bs(&h->mv[MV_FWD_X0], &h->mv[MV_FWD_X2], mb_type > P_8X8); 105 bs[7] = get_bs(&h->mv[MV_FWD_X1], &h->mv[MV_FWD_X3], mb_type > P_8X8); 106 } 107 bs[0] = get_bs(&h->mv[MV_FWD_A1], &h->mv[MV_FWD_X0], mb_type > P_8X8); 108 bs[1] = get_bs(&h->mv[MV_FWD_A3], &h->mv[MV_FWD_X2], mb_type > P_8X8); 109 bs[4] = get_bs(&h->mv[MV_FWD_B2], &h->mv[MV_FWD_X0], mb_type > P_8X8); 110 bs[5] = get_bs(&h->mv[MV_FWD_B3], &h->mv[MV_FWD_X1], mb_type > P_8X8); 111 } 112 if(AV_RN64(bs)) { 113 if(h->flags & A_AVAIL) { 114 qp_avg = (h->qp + h->left_qp + 1) >> 1; 115 SET_PARAMS; 116 h->s.dsp.cavs_filter_lv(h->cy,h->l_stride,alpha,beta,tc,bs[0],bs[1]); 117 h->s.dsp.cavs_filter_cv(h->cu,h->c_stride,alpha,beta,tc,bs[0],bs[1]); 118 h->s.dsp.cavs_filter_cv(h->cv,h->c_stride,alpha,beta,tc,bs[0],bs[1]); 119 } 120 qp_avg = h->qp; 121 SET_PARAMS; 122 h->s.dsp.cavs_filter_lv(h->cy + 8,h->l_stride,alpha,beta,tc,bs[2],bs[3]); 123 h->s.dsp.cavs_filter_lh(h->cy + 8*h->l_stride,h->l_stride,alpha,beta,tc, 124 bs[6],bs[7]); 125 126 if(h->flags & B_AVAIL) { 127 qp_avg = (h->qp + h->top_qp[h->mbx] + 1) >> 1; 128 SET_PARAMS; 129 h->s.dsp.cavs_filter_lh(h->cy,h->l_stride,alpha,beta,tc,bs[4],bs[5]); 130 h->s.dsp.cavs_filter_ch(h->cu,h->c_stride,alpha,beta,tc,bs[4],bs[5]); 131 h->s.dsp.cavs_filter_ch(h->cv,h->c_stride,alpha,beta,tc,bs[4],bs[5]); 132 } 133 } 134 } 135 h->left_qp = h->qp; 136 h->top_qp[h->mbx] = h->qp; 137} 138 139#undef SET_PARAMS 140 141/***************************************************************************** 142 * 143 * spatial intra prediction 144 * 145 ****************************************************************************/ 146 147void ff_cavs_load_intra_pred_luma(AVSContext *h, uint8_t *top, 148 uint8_t **left, int block) { 149 int i; 150 151 switch(block) { 152 case 0: 153 *left = h->left_border_y; 154 h->left_border_y[0] = h->left_border_y[1]; 155 memset(&h->left_border_y[17],h->left_border_y[16],9); 156 memcpy(&top[1],&h->top_border_y[h->mbx*16],16); 157 top[17] = top[16]; 158 top[0] = top[1]; 159 if((h->flags & A_AVAIL) && (h->flags & B_AVAIL)) 160 h->left_border_y[0] = top[0] = h->topleft_border_y; 161 break; 162 case 1: 163 *left = h->intern_border_y; 164 for(i=0;i<8;i++) 165 h->intern_border_y[i+1] = *(h->cy + 7 + i*h->l_stride); 166 memset(&h->intern_border_y[9],h->intern_border_y[8],9); 167 h->intern_border_y[0] = h->intern_border_y[1]; 168 memcpy(&top[1],&h->top_border_y[h->mbx*16+8],8); 169 if(h->flags & C_AVAIL) 170 memcpy(&top[9],&h->top_border_y[(h->mbx + 1)*16],8); 171 else 172 memset(&top[9],top[8],9); 173 top[17] = top[16]; 174 top[0] = top[1]; 175 if(h->flags & B_AVAIL) 176 h->intern_border_y[0] = top[0] = h->top_border_y[h->mbx*16+7]; 177 break; 178 case 2: 179 *left = &h->left_border_y[8]; 180 memcpy(&top[1],h->cy + 7*h->l_stride,16); 181 top[17] = top[16]; 182 top[0] = top[1]; 183 if(h->flags & A_AVAIL) 184 top[0] = h->left_border_y[8]; 185 break; 186 case 3: 187 *left = &h->intern_border_y[8]; 188 for(i=0;i<8;i++) 189 h->intern_border_y[i+9] = *(h->cy + 7 + (i+8)*h->l_stride); 190 memset(&h->intern_border_y[17],h->intern_border_y[16],9); 191 memcpy(&top[0],h->cy + 7 + 7*h->l_stride,9); 192 memset(&top[9],top[8],9); 193 break; 194 } 195} 196 197void ff_cavs_load_intra_pred_chroma(AVSContext *h) { 198 /* extend borders by one pixel */ 199 h->left_border_u[9] = h->left_border_u[8]; 200 h->left_border_v[9] = h->left_border_v[8]; 201 h->top_border_u[h->mbx*10+9] = h->top_border_u[h->mbx*10+8]; 202 h->top_border_v[h->mbx*10+9] = h->top_border_v[h->mbx*10+8]; 203 if(h->mbx && h->mby) { 204 h->top_border_u[h->mbx*10] = h->left_border_u[0] = h->topleft_border_u; 205 h->top_border_v[h->mbx*10] = h->left_border_v[0] = h->topleft_border_v; 206 } else { 207 h->left_border_u[0] = h->left_border_u[1]; 208 h->left_border_v[0] = h->left_border_v[1]; 209 h->top_border_u[h->mbx*10] = h->top_border_u[h->mbx*10+1]; 210 h->top_border_v[h->mbx*10] = h->top_border_v[h->mbx*10+1]; 211 } 212} 213 214static void intra_pred_vert(uint8_t *d,uint8_t *top,uint8_t *left,int stride) { 215 int y; 216 uint64_t a = AV_RN64(&top[1]); 217 for(y=0;y<8;y++) { 218 *((uint64_t *)(d+y*stride)) = a; 219 } 220} 221 222static void intra_pred_horiz(uint8_t *d,uint8_t *top,uint8_t *left,int stride) { 223 int y; 224 uint64_t a; 225 for(y=0;y<8;y++) { 226 a = left[y+1] * 0x0101010101010101ULL; 227 *((uint64_t *)(d+y*stride)) = a; 228 } 229} 230 231static void intra_pred_dc_128(uint8_t *d,uint8_t *top,uint8_t *left,int stride) { 232 int y; 233 uint64_t a = 0x8080808080808080ULL; 234 for(y=0;y<8;y++) 235 *((uint64_t *)(d+y*stride)) = a; 236} 237 238static void intra_pred_plane(uint8_t *d,uint8_t *top,uint8_t *left,int stride) { 239 int x,y,ia; 240 int ih = 0; 241 int iv = 0; 242 uint8_t *cm = ff_cropTbl + MAX_NEG_CROP; 243 244 for(x=0; x<4; x++) { 245 ih += (x+1)*(top[5+x]-top[3-x]); 246 iv += (x+1)*(left[5+x]-left[3-x]); 247 } 248 ia = (top[8]+left[8])<<4; 249 ih = (17*ih+16)>>5; 250 iv = (17*iv+16)>>5; 251 for(y=0; y<8; y++) 252 for(x=0; x<8; x++) 253 d[y*stride+x] = cm[(ia+(x-3)*ih+(y-3)*iv+16)>>5]; 254} 255 256#define LOWPASS(ARRAY,INDEX) \ 257 (( ARRAY[(INDEX)-1] + 2*ARRAY[(INDEX)] + ARRAY[(INDEX)+1] + 2) >> 2) 258 259static void intra_pred_lp(uint8_t *d,uint8_t *top,uint8_t *left,int stride) { 260 int x,y; 261 for(y=0; y<8; y++) 262 for(x=0; x<8; x++) 263 d[y*stride+x] = (LOWPASS(top,x+1) + LOWPASS(left,y+1)) >> 1; 264} 265 266static void intra_pred_down_left(uint8_t *d,uint8_t *top,uint8_t *left,int stride) { 267 int x,y; 268 for(y=0; y<8; y++) 269 for(x=0; x<8; x++) 270 d[y*stride+x] = (LOWPASS(top,x+y+2) + LOWPASS(left,x+y+2)) >> 1; 271} 272 273static void intra_pred_down_right(uint8_t *d,uint8_t *top,uint8_t *left,int stride) { 274 int x,y; 275 for(y=0; y<8; y++) 276 for(x=0; x<8; x++) 277 if(x==y) 278 d[y*stride+x] = (left[1]+2*top[0]+top[1]+2)>>2; 279 else if(x>y) 280 d[y*stride+x] = LOWPASS(top,x-y); 281 else 282 d[y*stride+x] = LOWPASS(left,y-x); 283} 284 285static void intra_pred_lp_left(uint8_t *d,uint8_t *top,uint8_t *left,int stride) { 286 int x,y; 287 for(y=0; y<8; y++) 288 for(x=0; x<8; x++) 289 d[y*stride+x] = LOWPASS(left,y+1); 290} 291 292static void intra_pred_lp_top(uint8_t *d,uint8_t *top,uint8_t *left,int stride) { 293 int x,y; 294 for(y=0; y<8; y++) 295 for(x=0; x<8; x++) 296 d[y*stride+x] = LOWPASS(top,x+1); 297} 298 299#undef LOWPASS 300 301void ff_cavs_modify_mb_i(AVSContext *h, int *pred_mode_uv) { 302 /* save pred modes before they get modified */ 303 h->pred_mode_Y[3] = h->pred_mode_Y[5]; 304 h->pred_mode_Y[6] = h->pred_mode_Y[8]; 305 h->top_pred_Y[h->mbx*2+0] = h->pred_mode_Y[7]; 306 h->top_pred_Y[h->mbx*2+1] = h->pred_mode_Y[8]; 307 308 /* modify pred modes according to availability of neighbour samples */ 309 if(!(h->flags & A_AVAIL)) { 310 modify_pred(ff_left_modifier_l, &h->pred_mode_Y[4] ); 311 modify_pred(ff_left_modifier_l, &h->pred_mode_Y[7] ); 312 modify_pred(ff_left_modifier_c, pred_mode_uv ); 313 } 314 if(!(h->flags & B_AVAIL)) { 315 modify_pred(ff_top_modifier_l, &h->pred_mode_Y[4] ); 316 modify_pred(ff_top_modifier_l, &h->pred_mode_Y[5] ); 317 modify_pred(ff_top_modifier_c, pred_mode_uv ); 318 } 319} 320 321/***************************************************************************** 322 * 323 * motion compensation 324 * 325 ****************************************************************************/ 326 327static inline void mc_dir_part(AVSContext *h,Picture *pic,int square, 328 int chroma_height,int delta,int list,uint8_t *dest_y, 329 uint8_t *dest_cb,uint8_t *dest_cr,int src_x_offset, 330 int src_y_offset,qpel_mc_func *qpix_op, 331 h264_chroma_mc_func chroma_op,cavs_vector *mv){ 332 MpegEncContext * const s = &h->s; 333 const int mx= mv->x + src_x_offset*8; 334 const int my= mv->y + src_y_offset*8; 335 const int luma_xy= (mx&3) + ((my&3)<<2); 336 uint8_t * src_y = pic->data[0] + (mx>>2) + (my>>2)*h->l_stride; 337 uint8_t * src_cb= pic->data[1] + (mx>>3) + (my>>3)*h->c_stride; 338 uint8_t * src_cr= pic->data[2] + (mx>>3) + (my>>3)*h->c_stride; 339 int extra_width= 0; //(s->flags&CODEC_FLAG_EMU_EDGE) ? 0 : 16; 340 int extra_height= extra_width; 341 int emu=0; 342 const int full_mx= mx>>2; 343 const int full_my= my>>2; 344 const int pic_width = 16*h->mb_width; 345 const int pic_height = 16*h->mb_height; 346 347 if(!pic->data[0]) 348 return; 349 if(mx&7) extra_width -= 3; 350 if(my&7) extra_height -= 3; 351 352 if( full_mx < 0-extra_width 353 || full_my < 0-extra_height 354 || full_mx + 16/*FIXME*/ > pic_width + extra_width 355 || full_my + 16/*FIXME*/ > pic_height + extra_height){ 356 ff_emulated_edge_mc(s->edge_emu_buffer, src_y - 2 - 2*h->l_stride, h->l_stride, 357 16+5, 16+5/*FIXME*/, full_mx-2, full_my-2, pic_width, pic_height); 358 src_y= s->edge_emu_buffer + 2 + 2*h->l_stride; 359 emu=1; 360 } 361 362 qpix_op[luma_xy](dest_y, src_y, h->l_stride); //FIXME try variable height perhaps? 363 if(!square){ 364 qpix_op[luma_xy](dest_y + delta, src_y + delta, h->l_stride); 365 } 366 367 if(emu){ 368 ff_emulated_edge_mc(s->edge_emu_buffer, src_cb, h->c_stride, 369 9, 9/*FIXME*/, (mx>>3), (my>>3), pic_width>>1, pic_height>>1); 370 src_cb= s->edge_emu_buffer; 371 } 372 chroma_op(dest_cb, src_cb, h->c_stride, chroma_height, mx&7, my&7); 373 374 if(emu){ 375 ff_emulated_edge_mc(s->edge_emu_buffer, src_cr, h->c_stride, 376 9, 9/*FIXME*/, (mx>>3), (my>>3), pic_width>>1, pic_height>>1); 377 src_cr= s->edge_emu_buffer; 378 } 379 chroma_op(dest_cr, src_cr, h->c_stride, chroma_height, mx&7, my&7); 380} 381 382static inline void mc_part_std(AVSContext *h,int square,int chroma_height,int delta, 383 uint8_t *dest_y,uint8_t *dest_cb,uint8_t *dest_cr, 384 int x_offset, int y_offset,qpel_mc_func *qpix_put, 385 h264_chroma_mc_func chroma_put,qpel_mc_func *qpix_avg, 386 h264_chroma_mc_func chroma_avg, cavs_vector *mv){ 387 qpel_mc_func *qpix_op= qpix_put; 388 h264_chroma_mc_func chroma_op= chroma_put; 389 390 dest_y += 2*x_offset + 2*y_offset*h->l_stride; 391 dest_cb += x_offset + y_offset*h->c_stride; 392 dest_cr += x_offset + y_offset*h->c_stride; 393 x_offset += 8*h->mbx; 394 y_offset += 8*h->mby; 395 396 if(mv->ref >= 0){ 397 Picture *ref= &h->DPB[mv->ref]; 398 mc_dir_part(h, ref, square, chroma_height, delta, 0, 399 dest_y, dest_cb, dest_cr, x_offset, y_offset, 400 qpix_op, chroma_op, mv); 401 402 qpix_op= qpix_avg; 403 chroma_op= chroma_avg; 404 } 405 406 if((mv+MV_BWD_OFFS)->ref >= 0){ 407 Picture *ref= &h->DPB[0]; 408 mc_dir_part(h, ref, square, chroma_height, delta, 1, 409 dest_y, dest_cb, dest_cr, x_offset, y_offset, 410 qpix_op, chroma_op, mv+MV_BWD_OFFS); 411 } 412} 413 414void ff_cavs_inter(AVSContext *h, enum cavs_mb mb_type) { 415 if(ff_cavs_partition_flags[mb_type] == 0){ // 16x16 416 mc_part_std(h, 1, 8, 0, h->cy, h->cu, h->cv, 0, 0, 417 h->s.dsp.put_cavs_qpel_pixels_tab[0], 418 h->s.dsp.put_h264_chroma_pixels_tab[0], 419 h->s.dsp.avg_cavs_qpel_pixels_tab[0], 420 h->s.dsp.avg_h264_chroma_pixels_tab[0],&h->mv[MV_FWD_X0]); 421 }else{ 422 mc_part_std(h, 1, 4, 0, h->cy, h->cu, h->cv, 0, 0, 423 h->s.dsp.put_cavs_qpel_pixels_tab[1], 424 h->s.dsp.put_h264_chroma_pixels_tab[1], 425 h->s.dsp.avg_cavs_qpel_pixels_tab[1], 426 h->s.dsp.avg_h264_chroma_pixels_tab[1],&h->mv[MV_FWD_X0]); 427 mc_part_std(h, 1, 4, 0, h->cy, h->cu, h->cv, 4, 0, 428 h->s.dsp.put_cavs_qpel_pixels_tab[1], 429 h->s.dsp.put_h264_chroma_pixels_tab[1], 430 h->s.dsp.avg_cavs_qpel_pixels_tab[1], 431 h->s.dsp.avg_h264_chroma_pixels_tab[1],&h->mv[MV_FWD_X1]); 432 mc_part_std(h, 1, 4, 0, h->cy, h->cu, h->cv, 0, 4, 433 h->s.dsp.put_cavs_qpel_pixels_tab[1], 434 h->s.dsp.put_h264_chroma_pixels_tab[1], 435 h->s.dsp.avg_cavs_qpel_pixels_tab[1], 436 h->s.dsp.avg_h264_chroma_pixels_tab[1],&h->mv[MV_FWD_X2]); 437 mc_part_std(h, 1, 4, 0, h->cy, h->cu, h->cv, 4, 4, 438 h->s.dsp.put_cavs_qpel_pixels_tab[1], 439 h->s.dsp.put_h264_chroma_pixels_tab[1], 440 h->s.dsp.avg_cavs_qpel_pixels_tab[1], 441 h->s.dsp.avg_h264_chroma_pixels_tab[1],&h->mv[MV_FWD_X3]); 442 } 443} 444 445/***************************************************************************** 446 * 447 * motion vector prediction 448 * 449 ****************************************************************************/ 450 451static inline void scale_mv(AVSContext *h, int *d_x, int *d_y, cavs_vector *src, int distp) { 452 int den = h->scale_den[src->ref]; 453 454 *d_x = (src->x*distp*den + 256 + (src->x>>31)) >> 9; 455 *d_y = (src->y*distp*den + 256 + (src->y>>31)) >> 9; 456} 457 458static inline void mv_pred_median(AVSContext *h, cavs_vector *mvP, 459 cavs_vector *mvA, cavs_vector *mvB, cavs_vector *mvC) { 460 int ax, ay, bx, by, cx, cy; 461 int len_ab, len_bc, len_ca, len_mid; 462 463 /* scale candidates according to their temporal span */ 464 scale_mv(h, &ax, &ay, mvA, mvP->dist); 465 scale_mv(h, &bx, &by, mvB, mvP->dist); 466 scale_mv(h, &cx, &cy, mvC, mvP->dist); 467 /* find the geometrical median of the three candidates */ 468 len_ab = abs(ax - bx) + abs(ay - by); 469 len_bc = abs(bx - cx) + abs(by - cy); 470 len_ca = abs(cx - ax) + abs(cy - ay); 471 len_mid = mid_pred(len_ab, len_bc, len_ca); 472 if(len_mid == len_ab) { 473 mvP->x = cx; 474 mvP->y = cy; 475 } else if(len_mid == len_bc) { 476 mvP->x = ax; 477 mvP->y = ay; 478 } else { 479 mvP->x = bx; 480 mvP->y = by; 481 } 482} 483 484void ff_cavs_mv(AVSContext *h, enum cavs_mv_loc nP, enum cavs_mv_loc nC, 485 enum cavs_mv_pred mode, enum cavs_block size, int ref) { 486 cavs_vector *mvP = &h->mv[nP]; 487 cavs_vector *mvA = &h->mv[nP-1]; 488 cavs_vector *mvB = &h->mv[nP-4]; 489 cavs_vector *mvC = &h->mv[nC]; 490 const cavs_vector *mvP2 = NULL; 491 492 mvP->ref = ref; 493 mvP->dist = h->dist[mvP->ref]; 494 if(mvC->ref == NOT_AVAIL) 495 mvC = &h->mv[nP-5]; // set to top-left (mvD) 496 if((mode == MV_PRED_PSKIP) && 497 ((mvA->ref == NOT_AVAIL) || (mvB->ref == NOT_AVAIL) || 498 ((mvA->x | mvA->y | mvA->ref) == 0) || 499 ((mvB->x | mvB->y | mvB->ref) == 0) )) { 500 mvP2 = &ff_cavs_un_mv; 501 /* if there is only one suitable candidate, take it */ 502 } else if((mvA->ref >= 0) && (mvB->ref < 0) && (mvC->ref < 0)) { 503 mvP2= mvA; 504 } else if((mvA->ref < 0) && (mvB->ref >= 0) && (mvC->ref < 0)) { 505 mvP2= mvB; 506 } else if((mvA->ref < 0) && (mvB->ref < 0) && (mvC->ref >= 0)) { 507 mvP2= mvC; 508 } else if(mode == MV_PRED_LEFT && mvA->ref == ref){ 509 mvP2= mvA; 510 } else if(mode == MV_PRED_TOP && mvB->ref == ref){ 511 mvP2= mvB; 512 } else if(mode == MV_PRED_TOPRIGHT && mvC->ref == ref){ 513 mvP2= mvC; 514 } 515 if(mvP2){ 516 mvP->x = mvP2->x; 517 mvP->y = mvP2->y; 518 }else 519 mv_pred_median(h, mvP, mvA, mvB, mvC); 520 521 if(mode < MV_PRED_PSKIP) { 522 mvP->x += get_se_golomb(&h->s.gb); 523 mvP->y += get_se_golomb(&h->s.gb); 524 } 525 set_mvs(mvP,size); 526} 527 528/***************************************************************************** 529 * 530 * macroblock level 531 * 532 ****************************************************************************/ 533 534/** 535 * initialise predictors for motion vectors and intra prediction 536 */ 537void ff_cavs_init_mb(AVSContext *h) { 538 int i; 539 540 /* copy predictors from top line (MB B and C) into cache */ 541 for(i=0;i<3;i++) { 542 h->mv[MV_FWD_B2+i] = h->top_mv[0][h->mbx*2+i]; 543 h->mv[MV_BWD_B2+i] = h->top_mv[1][h->mbx*2+i]; 544 } 545 h->pred_mode_Y[1] = h->top_pred_Y[h->mbx*2+0]; 546 h->pred_mode_Y[2] = h->top_pred_Y[h->mbx*2+1]; 547 /* clear top predictors if MB B is not available */ 548 if(!(h->flags & B_AVAIL)) { 549 h->mv[MV_FWD_B2] = ff_cavs_un_mv; 550 h->mv[MV_FWD_B3] = ff_cavs_un_mv; 551 h->mv[MV_BWD_B2] = ff_cavs_un_mv; 552 h->mv[MV_BWD_B3] = ff_cavs_un_mv; 553 h->pred_mode_Y[1] = h->pred_mode_Y[2] = NOT_AVAIL; 554 h->flags &= ~(C_AVAIL|D_AVAIL); 555 } else if(h->mbx) { 556 h->flags |= D_AVAIL; 557 } 558 if(h->mbx == h->mb_width-1) //MB C not available 559 h->flags &= ~C_AVAIL; 560 /* clear top-right predictors if MB C is not available */ 561 if(!(h->flags & C_AVAIL)) { 562 h->mv[MV_FWD_C2] = ff_cavs_un_mv; 563 h->mv[MV_BWD_C2] = ff_cavs_un_mv; 564 } 565 /* clear top-left predictors if MB D is not available */ 566 if(!(h->flags & D_AVAIL)) { 567 h->mv[MV_FWD_D3] = ff_cavs_un_mv; 568 h->mv[MV_BWD_D3] = ff_cavs_un_mv; 569 } 570} 571 572/** 573 * save predictors for later macroblocks and increase 574 * macroblock address 575 * @return 0 if end of frame is reached, 1 otherwise 576 */ 577int ff_cavs_next_mb(AVSContext *h) { 578 int i; 579 580 h->flags |= A_AVAIL; 581 h->cy += 16; 582 h->cu += 8; 583 h->cv += 8; 584 /* copy mvs as predictors to the left */ 585 for(i=0;i<=20;i+=4) 586 h->mv[i] = h->mv[i+2]; 587 /* copy bottom mvs from cache to top line */ 588 h->top_mv[0][h->mbx*2+0] = h->mv[MV_FWD_X2]; 589 h->top_mv[0][h->mbx*2+1] = h->mv[MV_FWD_X3]; 590 h->top_mv[1][h->mbx*2+0] = h->mv[MV_BWD_X2]; 591 h->top_mv[1][h->mbx*2+1] = h->mv[MV_BWD_X3]; 592 /* next MB address */ 593 h->mbidx++; 594 h->mbx++; 595 if(h->mbx == h->mb_width) { //new mb line 596 h->flags = B_AVAIL|C_AVAIL; 597 /* clear left pred_modes */ 598 h->pred_mode_Y[3] = h->pred_mode_Y[6] = NOT_AVAIL; 599 /* clear left mv predictors */ 600 for(i=0;i<=20;i+=4) 601 h->mv[i] = ff_cavs_un_mv; 602 h->mbx = 0; 603 h->mby++; 604 /* re-calculate sample pointers */ 605 h->cy = h->picture.data[0] + h->mby*16*h->l_stride; 606 h->cu = h->picture.data[1] + h->mby*8*h->c_stride; 607 h->cv = h->picture.data[2] + h->mby*8*h->c_stride; 608 if(h->mby == h->mb_height) { //frame end 609 return 0; 610 } 611 } 612 return 1; 613} 614 615/***************************************************************************** 616 * 617 * frame level 618 * 619 ****************************************************************************/ 620 621void ff_cavs_init_pic(AVSContext *h) { 622 int i; 623 624 /* clear some predictors */ 625 for(i=0;i<=20;i+=4) 626 h->mv[i] = ff_cavs_un_mv; 627 h->mv[MV_BWD_X0] = ff_cavs_dir_mv; 628 set_mvs(&h->mv[MV_BWD_X0], BLK_16X16); 629 h->mv[MV_FWD_X0] = ff_cavs_dir_mv; 630 set_mvs(&h->mv[MV_FWD_X0], BLK_16X16); 631 h->pred_mode_Y[3] = h->pred_mode_Y[6] = NOT_AVAIL; 632 h->cy = h->picture.data[0]; 633 h->cu = h->picture.data[1]; 634 h->cv = h->picture.data[2]; 635 h->l_stride = h->picture.linesize[0]; 636 h->c_stride = h->picture.linesize[1]; 637 h->luma_scan[2] = 8*h->l_stride; 638 h->luma_scan[3] = 8*h->l_stride+8; 639 h->mbx = h->mby = h->mbidx = 0; 640 h->flags = 0; 641} 642 643/***************************************************************************** 644 * 645 * headers and interface 646 * 647 ****************************************************************************/ 648 649/** 650 * some predictions require data from the top-neighbouring macroblock. 651 * this data has to be stored for one complete row of macroblocks 652 * and this storage space is allocated here 653 */ 654void ff_cavs_init_top_lines(AVSContext *h) { 655 /* alloc top line of predictors */ 656 h->top_qp = av_malloc( h->mb_width); 657 h->top_mv[0] = av_malloc((h->mb_width*2+1)*sizeof(cavs_vector)); 658 h->top_mv[1] = av_malloc((h->mb_width*2+1)*sizeof(cavs_vector)); 659 h->top_pred_Y = av_malloc( h->mb_width*2*sizeof(*h->top_pred_Y)); 660 h->top_border_y = av_malloc((h->mb_width+1)*16); 661 h->top_border_u = av_malloc((h->mb_width)*10); 662 h->top_border_v = av_malloc((h->mb_width)*10); 663 664 /* alloc space for co-located MVs and types */ 665 h->col_mv = av_malloc( h->mb_width*h->mb_height*4*sizeof(cavs_vector)); 666 h->col_type_base = av_malloc(h->mb_width*h->mb_height); 667 h->block = av_mallocz(64*sizeof(DCTELEM)); 668} 669 670av_cold int ff_cavs_init(AVCodecContext *avctx) { 671 AVSContext *h = avctx->priv_data; 672 MpegEncContext * const s = &h->s; 673 674 MPV_decode_defaults(s); 675 s->avctx = avctx; 676 677 avctx->pix_fmt= PIX_FMT_YUV420P; 678 679 h->luma_scan[0] = 0; 680 h->luma_scan[1] = 8; 681 h->intra_pred_l[ INTRA_L_VERT] = intra_pred_vert; 682 h->intra_pred_l[ INTRA_L_HORIZ] = intra_pred_horiz; 683 h->intra_pred_l[ INTRA_L_LP] = intra_pred_lp; 684 h->intra_pred_l[ INTRA_L_DOWN_LEFT] = intra_pred_down_left; 685 h->intra_pred_l[INTRA_L_DOWN_RIGHT] = intra_pred_down_right; 686 h->intra_pred_l[ INTRA_L_LP_LEFT] = intra_pred_lp_left; 687 h->intra_pred_l[ INTRA_L_LP_TOP] = intra_pred_lp_top; 688 h->intra_pred_l[ INTRA_L_DC_128] = intra_pred_dc_128; 689 h->intra_pred_c[ INTRA_C_LP] = intra_pred_lp; 690 h->intra_pred_c[ INTRA_C_HORIZ] = intra_pred_horiz; 691 h->intra_pred_c[ INTRA_C_VERT] = intra_pred_vert; 692 h->intra_pred_c[ INTRA_C_PLANE] = intra_pred_plane; 693 h->intra_pred_c[ INTRA_C_LP_LEFT] = intra_pred_lp_left; 694 h->intra_pred_c[ INTRA_C_LP_TOP] = intra_pred_lp_top; 695 h->intra_pred_c[ INTRA_C_DC_128] = intra_pred_dc_128; 696 h->mv[ 7] = ff_cavs_un_mv; 697 h->mv[19] = ff_cavs_un_mv; 698 return 0; 699} 700 701av_cold int ff_cavs_end(AVCodecContext *avctx) { 702 AVSContext *h = avctx->priv_data; 703 704 av_free(h->top_qp); 705 av_free(h->top_mv[0]); 706 av_free(h->top_mv[1]); 707 av_free(h->top_pred_Y); 708 av_free(h->top_border_y); 709 av_free(h->top_border_u); 710 av_free(h->top_border_v); 711 av_free(h->col_mv); 712 av_free(h->col_type_base); 713 av_free(h->block); 714 return 0; 715} 716