vp8/encoder/ethreading.c

   1 /*
   2  *  Copyright (c) 2010 The WebM project authors. All Rights Reserved.
   3  *
   4  *  Use of this source code is governed by a BSD-style license
   5  *  that can be found in the LICENSE file in the root of the source
   6  *  tree. An additional intellectual property rights grant can be found
   7  *  in the file PATENTS.  All contributing project authors may
   8  *  be found in the AUTHORS file in the root of the source tree.
   9  */
  10
  11 #include "onyx_int.h"
  12 #include "vp8/common/threading.h"
  13 #include "vp8/common/common.h"
  14 #include "vp8/common/extend.h"
  15
  16 #include "bitstream.h"
  17
  18 #if CONFIG_MULTITHREAD
  19
  20 extern int vp8cx_encode_inter_macroblock(VP8_COMP *cpi, MACROBLOCK *x,
  21                                          TOKENEXTRA **t,
  22                                          int recon_yoffset, int recon_uvoffset,
  23                                          int mb_row, int mb_col);
  24 extern int vp8cx_encode_intra_macroblock(VP8_COMP *cpi, MACROBLOCK *x,
  25                                          TOKENEXTRA **t);
  26 extern void vp8cx_mb_init_quantizer(VP8_COMP *cpi, MACROBLOCK *x, int ok_to_skip);
  27 extern void vp8_build_block_offsets(MACROBLOCK *x);
  28 extern void vp8_setup_block_ptrs(MACROBLOCK *x);
  29
  30 extern void vp8_loopfilter_frame(VP8_COMP *cpi, VP8_COMMON *cm);
  31
  32 static THREAD_FUNCTION thread_loopfilter(void *p_data)
  33 {
  34     VP8_COMP *cpi = (VP8_COMP *)(((LPFTHREAD_DATA *)p_data)->ptr1);
  35     VP8_COMMON *cm = &cpi->common;
  36
  37     while (1)
  38     {
  39         if (cpi->b_multi_threaded == 0)
  40             break;
  41
  42         if (sem_wait(&cpi->h_event_start_lpf) == 0)
  43         {
  44             if (cpi->b_multi_threaded == 0) // we're shutting down
  45                 break;
  46
  47             vp8_loopfilter_frame(cpi, cm);
  48
  49             sem_post(&cpi->h_event_end_lpf);
  50         }
  51     }
  52
  53     return 0;
  54 }
  55
  56 static
  57 THREAD_FUNCTION thread_encoding_proc(void *p_data)
  58 {
  59     int ithread = ((ENCODETHREAD_DATA *)p_data)->ithread;
  60     VP8_COMP *cpi = (VP8_COMP *)(((ENCODETHREAD_DATA *)p_data)->ptr1);
  61     MB_ROW_COMP *mbri = (MB_ROW_COMP *)(((ENCODETHREAD_DATA *)p_data)->ptr2);
  62     ENTROPY_CONTEXT_PLANES mb_row_left_context;
  63
  64     const int nsync = cpi->mt_sync_range;
  65     //printf("Started thread %d\n", ithread);
  66
  67     while (1)
  68     {
  69         if (cpi->b_multi_threaded == 0)
  70             break;
  71
  72         //if(WaitForSingleObject(cpi->h_event_mbrencoding[ithread], INFINITE) == WAIT_OBJECT_0)
  73         if (sem_wait(&cpi->h_event_start_encoding[ithread]) == 0)
  74         {
  75             VP8_COMMON *cm = &cpi->common;
  76             int mb_row;
  77             MACROBLOCK *x = &mbri->mb;
  78             MACROBLOCKD *xd = &x->e_mbd;
  79             TOKENEXTRA *tp ;
  80 #if CONFIG_REALTIME_ONLY & CONFIG_ONTHEFLY_BITPACKING
  81             TOKENEXTRA *tp_start = cpi->tok + (1 + ithread) * (16 * 24);
  82             const int num_part = (1 << cm->multi_token_partition);
  83 #endif
  84
  85             int *segment_counts = mbri->segment_counts;
  86             int *totalrate = &mbri->totalrate;
  87
  88             if (cpi->b_multi_threaded == 0) // we're shutting down
  89                 break;
  90
  91             for (mb_row = ithread + 1; mb_row < cm->mb_rows; mb_row += (cpi->encoding_thread_count + 1))
  92             {
  93
  94                 int recon_yoffset, recon_uvoffset;
  95                 int mb_col;
  96                 int ref_fb_idx = cm->lst_fb_idx;
  97                 int dst_fb_idx = cm->new_fb_idx;
  98                 int recon_y_stride = cm->yv12_fb[ref_fb_idx].y_stride;
  99                 int recon_uv_stride = cm->yv12_fb[ref_fb_idx].uv_stride;
 100                 int map_index = (mb_row * cm->mb_cols);
 101                 volatile const int *last_row_current_mb_col;
 102                 volatile int *current_mb_col = &cpi->mt_current_mb_col[mb_row];
 103
 104 #if  (CONFIG_REALTIME_ONLY & CONFIG_ONTHEFLY_BITPACKING)
 105                 vp8_writer *w = &cpi->bc[1 + (mb_row % num_part)];
 106 #else
 107                 tp = cpi->tok + (mb_row * (cm->mb_cols * 16 * 24));
 108                 cpi->tplist[mb_row].start = tp;
 109 #endif
 110
 111                 last_row_current_mb_col = &cpi->mt_current_mb_col[mb_row - 1];
 112
 113                 // reset above block coeffs
 114                 xd->above_context = cm->above_context;
 115                 xd->left_context = &mb_row_left_context;
 116
 117                 vp8_zero(mb_row_left_context);
 118
 119                 xd->up_available = (mb_row != 0);
 120                 recon_yoffset = (mb_row * recon_y_stride * 16);
 121                 recon_uvoffset = (mb_row * recon_uv_stride * 8);
 122
 123                 // Set the mb activity pointer to the start of the row.
 124                 x->mb_activity_ptr = &cpi->mb_activity_map[map_index];
 125
 126                 // for each macroblock col in image
 127                 for (mb_col = 0; mb_col < cm->mb_cols; mb_col++)
 128                 {
 129                     *current_mb_col = mb_col - 1;
 130
 131                     if ((mb_col & (nsync - 1)) == 0)
 132                     {
 133                         while (mb_col > (*last_row_current_mb_col - nsync))
 134                         {
 135                             x86_pause_hint();
 136                             thread_sleep(0);
 137                         }
 138                     }
 139
 140 #if CONFIG_REALTIME_ONLY & CONFIG_ONTHEFLY_BITPACKING
 141                     tp = tp_start;
 142 #endif
 143
 144                     // Distance of Mb to the various image edges.
 145                     // These specified to 8th pel as they are always compared to values that are in 1/8th pel units
 146                     xd->mb_to_left_edge = -((mb_col * 16) << 3);
 147                     xd->mb_to_right_edge = ((cm->mb_cols - 1 - mb_col) * 16) << 3;
 148                     xd->mb_to_top_edge = -((mb_row * 16) << 3);
 149                     xd->mb_to_bottom_edge = ((cm->mb_rows - 1 - mb_row) * 16) << 3;
 150
 151                     // Set up limit values for motion vectors used to prevent them extending outside the UMV borders
 152                     x->mv_col_min = -((mb_col * 16) + (VP8BORDERINPIXELS - 16));
 153                     x->mv_col_max = ((cm->mb_cols - 1 - mb_col) * 16) + (VP8BORDERINPIXELS - 16);
 154                     x->mv_row_min = -((mb_row * 16) + (VP8BORDERINPIXELS - 16));
 155                     x->mv_row_max = ((cm->mb_rows - 1 - mb_row) * 16) + (VP8BORDERINPIXELS - 16);
 156
 157                     xd->dst.y_buffer = cm->yv12_fb[dst_fb_idx].y_buffer + recon_yoffset;
 158                     xd->dst.u_buffer = cm->yv12_fb[dst_fb_idx].u_buffer + recon_uvoffset;
 159                     xd->dst.v_buffer = cm->yv12_fb[dst_fb_idx].v_buffer + recon_uvoffset;
 160                     xd->left_available = (mb_col != 0);
 161
 162                     x->rddiv = cpi->RDDIV;
 163                     x->rdmult = cpi->RDMULT;
 164
 165                     //Copy current mb to a buffer
 166                     vp8_copy_mem16x16(x->src.y_buffer, x->src.y_stride, x->thismb, 16);
 167
 168                     if (cpi->oxcf.tuning == VP8_TUNE_SSIM)
 169                         vp8_activity_masking(cpi, x);
 170
 171                     // Is segmentation enabled
 172                     // MB level adjustment to quantizer
 173                     if (xd->segmentation_enabled)
 174                     {
 175                         // Code to set segment id in xd->mbmi.segment_id for current MB (with range checking)
 176                         if (cpi->segmentation_map[map_index + mb_col] <= 3)
 177                             xd->mode_info_context->mbmi.segment_id = cpi->segmentation_map[map_index + mb_col];
 178                         else
 179                             xd->mode_info_context->mbmi.segment_id = 0;
 180
 181                         vp8cx_mb_init_quantizer(cpi, x, 1);
 182                     }
 183                     else
 184                         xd->mode_info_context->mbmi.segment_id = 0; // Set to Segment 0 by default
 185
 186                     x->active_ptr = cpi->active_map + map_index + mb_col;
 187
 188                     if (cm->frame_type == KEY_FRAME)
 189                     {
 190                         *totalrate += vp8cx_encode_intra_macroblock(cpi, x, &tp);
 191 #ifdef MODE_STATS
 192                         y_modes[xd->mbmi.mode] ++;
 193 #endif
 194                     }
 195                     else
 196                     {
 197                         *totalrate += vp8cx_encode_inter_macroblock(cpi, x, &tp, recon_yoffset, recon_uvoffset, mb_row, mb_col);
 198
 199 #ifdef MODE_STATS
 200                         inter_y_modes[xd->mbmi.mode] ++;
 201
 202                         if (xd->mbmi.mode == SPLITMV)
 203                         {
 204                             int b;
 205
 206                             for (b = 0; b < xd->mbmi.partition_count; b++)
 207                             {
 208                                 inter_b_modes[x->partition->bmi[b].mode] ++;
 209                             }
 210                         }
 211
 212 #endif
 213
 214                         // Count of last ref frame 0,0 usage
 215                         if ((xd->mode_info_context->mbmi.mode == ZEROMV) && (xd->mode_info_context->mbmi.ref_frame == LAST_FRAME))
 216                             cpi->inter_zz_count++;
 217
 218                         // Special case code for cyclic refresh
 219                         // If cyclic update enabled then copy xd->mbmi.segment_id; (which may have been updated based on mode
 220                         // during vp8cx_encode_inter_macroblock()) back into the global segmentation map
 221                         if (cpi->cyclic_refresh_mode_enabled && xd->segmentation_enabled)
 222                         {
 223                             const MB_MODE_INFO * mbmi = &xd->mode_info_context->mbmi;
 224                             cpi->segmentation_map[map_index + mb_col] = mbmi->segment_id;
 225
 226                             // If the block has been refreshed mark it as clean (the magnitude of the -ve influences how long it will be before we consider another refresh):
 227                             // Else if it was coded (last frame 0,0) and has not already been refreshed then mark it as a candidate for cleanup next time (marked 0)
 228                             // else mark it as dirty (1).
 229                             if (mbmi->segment_id)
 230                                 cpi->cyclic_refresh_map[map_index + mb_col] = -1;
 231                             else if ((mbmi->mode == ZEROMV) && (mbmi->ref_frame == LAST_FRAME))
 232                             {
 233                                 if (cpi->cyclic_refresh_map[map_index + mb_col] == 1)
 234                                     cpi->cyclic_refresh_map[map_index + mb_col] = 0;
 235                             }
 236                             else
 237                                 cpi->cyclic_refresh_map[map_index + mb_col] = 1;
 238
 239                         }
 240                     }
 241
 242 #if CONFIG_REALTIME_ONLY & CONFIG_ONTHEFLY_BITPACKING
 243                     /* pack tokens for this MB */
 244                     {
 245                         int tok_count = tp - tp_start;
 246                         pack_tokens(w, tp_start, tok_count);
 247                     }
 248 #else
 249                     cpi->tplist[mb_row].stop = tp;
 250 #endif
 251                     // Increment pointer into gf usage flags structure.
 252                     x->gf_active_ptr++;
 253
 254                     // Increment the activity mask pointers.
 255                     x->mb_activity_ptr++;
 256
 257                     // adjust to the next column of macroblocks
 258                     x->src.y_buffer += 16;
 259                     x->src.u_buffer += 8;
 260                     x->src.v_buffer += 8;
 261
 262                     recon_yoffset += 16;
 263                     recon_uvoffset += 8;
 264
 265                     // Keep track of segment usage
 266                     segment_counts[xd->mode_info_context->mbmi.segment_id]++;
 267
 268                     // skip to next mb
 269                     xd->mode_info_context++;
 270                     x->partition_info++;
 271                     xd->above_context++;
 272                 }
 273
 274                 vp8_extend_mb_row( &cm->yv12_fb[dst_fb_idx],
 275                                     xd->dst.y_buffer + 16,
 276                                     xd->dst.u_buffer + 8,
 277                                     xd->dst.v_buffer + 8);
 278
 279                 *current_mb_col = mb_col + nsync;
 280
 281                 // this is to account for the border
 282                 xd->mode_info_context++;
 283                 x->partition_info++;
 284
 285                 x->src.y_buffer += 16 * x->src.y_stride * (cpi->encoding_thread_count + 1) - 16 * cm->mb_cols;
 286                 x->src.u_buffer += 8 * x->src.uv_stride * (cpi->encoding_thread_count + 1) - 8 * cm->mb_cols;
 287                 x->src.v_buffer += 8 * x->src.uv_stride * (cpi->encoding_thread_count + 1) - 8 * cm->mb_cols;
 288
 289                 xd->mode_info_context += xd->mode_info_stride * cpi->encoding_thread_count;
 290                 x->partition_info += xd->mode_info_stride * cpi->encoding_thread_count;
 291                 x->gf_active_ptr   += cm->mb_cols * cpi->encoding_thread_count;
 292
 293                 if (mb_row == cm->mb_rows - 1)
 294                 {
 295                     sem_post(&cpi->h_event_end_encoding); /* signal frame encoding end */
 296                 }
 297             }
 298         }
 299     }
 300
 301     //printf("exit thread %d\n", ithread);
 302     return 0;
 303 }
 304
 305 static void setup_mbby_copy(MACROBLOCK *mbdst, MACROBLOCK *mbsrc)
 306 {
 307
 308     MACROBLOCK *x = mbsrc;
 309     MACROBLOCK *z = mbdst;
 310     int i;
 311
 312     z->ss               = x->ss;
 313     z->ss_count          = x->ss_count;
 314     z->searches_per_step  = x->searches_per_step;
 315     z->errorperbit      = x->errorperbit;
 316
 317     z->sadperbit16      = x->sadperbit16;
 318     z->sadperbit4       = x->sadperbit4;
 319
 320     /*
 321     z->mv_col_min    = x->mv_col_min;
 322     z->mv_col_max    = x->mv_col_max;
 323     z->mv_row_min    = x->mv_row_min;
 324     z->mv_row_max    = x->mv_row_max;
 325     */
 326
 327     z->short_fdct4x4     = x->short_fdct4x4;
 328     z->short_fdct8x4     = x->short_fdct8x4;
 329     z->short_walsh4x4    = x->short_walsh4x4;
 330     z->quantize_b        = x->quantize_b;
 331     z->quantize_b_pair   = x->quantize_b_pair;
 332     z->optimize          = x->optimize;
 333
 334     /*
 335     z->mvc              = x->mvc;
 336     z->src.y_buffer      = x->src.y_buffer;
 337     z->src.u_buffer      = x->src.u_buffer;
 338     z->src.v_buffer      = x->src.v_buffer;
 339     */
 340
 341
 342     vpx_memcpy(z->mvcosts,          x->mvcosts,         sizeof(x->mvcosts));
 343     z->mvcost[0] = &z->mvcosts[0][mv_max+1];
 344     z->mvcost[1] = &z->mvcosts[1][mv_max+1];
 345     z->mvsadcost[0] = &z->mvsadcosts[0][mvfp_max+1];
 346     z->mvsadcost[1] = &z->mvsadcosts[1][mvfp_max+1];
 347
 348
 349     vpx_memcpy(z->token_costs,       x->token_costs,      sizeof(x->token_costs));
 350     vpx_memcpy(z->inter_bmode_costs,  x->inter_bmode_costs, sizeof(x->inter_bmode_costs));
 351     //memcpy(z->mvcosts,            x->mvcosts,         sizeof(x->mvcosts));
 352     //memcpy(z->mvcost,         x->mvcost,          sizeof(x->mvcost));
 353     vpx_memcpy(z->mbmode_cost,       x->mbmode_cost,      sizeof(x->mbmode_cost));
 354     vpx_memcpy(z->intra_uv_mode_cost,  x->intra_uv_mode_cost, sizeof(x->intra_uv_mode_cost));
 355     vpx_memcpy(z->bmode_costs,       x->bmode_costs,      sizeof(x->bmode_costs));
 356
 357     for (i = 0; i < 25; i++)
 358     {
 359         z->block[i].quant           = x->block[i].quant;
 360         z->block[i].quant_fast      = x->block[i].quant_fast;
 361         z->block[i].quant_shift     = x->block[i].quant_shift;
 362         z->block[i].zbin            = x->block[i].zbin;
 363         z->block[i].zrun_zbin_boost   = x->block[i].zrun_zbin_boost;
 364         z->block[i].round           = x->block[i].round;
 365         z->q_index                  = x->q_index;
 366         z->act_zbin_adj             = x->act_zbin_adj;
 367         z->last_act_zbin_adj        = x->last_act_zbin_adj;
 368         /*
 369         z->block[i].src             = x->block[i].src;
 370         */
 371         z->block[i].src_stride       = x->block[i].src_stride;
 372     }
 373
 374     {
 375         MACROBLOCKD *xd = &x->e_mbd;
 376         MACROBLOCKD *zd = &z->e_mbd;
 377
 378         /*
 379         zd->mode_info_context = xd->mode_info_context;
 380         zd->mode_info        = xd->mode_info;
 381
 382         zd->mode_info_stride  = xd->mode_info_stride;
 383         zd->frame_type       = xd->frame_type;
 384         zd->up_available     = xd->up_available   ;
 385         zd->left_available   = xd->left_available;
 386         zd->left_context     = xd->left_context;
 387         zd->last_frame_dc     = xd->last_frame_dc;
 388         zd->last_frame_dccons = xd->last_frame_dccons;
 389         zd->gold_frame_dc     = xd->gold_frame_dc;
 390         zd->gold_frame_dccons = xd->gold_frame_dccons;
 391         zd->mb_to_left_edge    = xd->mb_to_left_edge;
 392         zd->mb_to_right_edge   = xd->mb_to_right_edge;
 393         zd->mb_to_top_edge     = xd->mb_to_top_edge   ;
 394         zd->mb_to_bottom_edge  = xd->mb_to_bottom_edge;
 395         zd->gf_active_ptr     = xd->gf_active_ptr;
 396         zd->frames_since_golden       = xd->frames_since_golden;
 397         zd->frames_till_alt_ref_frame   = xd->frames_till_alt_ref_frame;
 398         */
 399         zd->subpixel_predict         = xd->subpixel_predict;
 400         zd->subpixel_predict8x4      = xd->subpixel_predict8x4;
 401         zd->subpixel_predict8x8      = xd->subpixel_predict8x8;
 402         zd->subpixel_predict16x16    = xd->subpixel_predict16x16;
 403         zd->segmentation_enabled     = xd->segmentation_enabled;
 404         zd->mb_segement_abs_delta      = xd->mb_segement_abs_delta;
 405         vpx_memcpy(zd->segment_feature_data, xd->segment_feature_data, sizeof(xd->segment_feature_data));
 406
 407         vpx_memcpy(zd->dequant_y1_dc, xd->dequant_y1_dc, sizeof(xd->dequant_y1_dc));
 408         vpx_memcpy(zd->dequant_y1, xd->dequant_y1, sizeof(xd->dequant_y1));
 409         vpx_memcpy(zd->dequant_y2, xd->dequant_y2, sizeof(xd->dequant_y2));
 410         vpx_memcpy(zd->dequant_uv, xd->dequant_uv, sizeof(xd->dequant_uv));
 411
 412 #if 1
 413         /*TODO:  Remove dequant from BLOCKD.  This is a temporary solution until
 414          * the quantizer code uses a passed in pointer to the dequant constants.
 415          * This will also require modifications to the x86 and neon assembly.
 416          * */
 417         for (i = 0; i < 16; i++)
 418             zd->block[i].dequant = zd->dequant_y1;
 419         for (i = 16; i < 24; i++)
 420             zd->block[i].dequant = zd->dequant_uv;
 421         zd->block[24].dequant = zd->dequant_y2;
 422 #endif
 423     }
 424 }
 425
 426 void vp8cx_init_mbrthread_data(VP8_COMP *cpi,
 427                                MACROBLOCK *x,
 428                                MB_ROW_COMP *mbr_ei,
 429                                int mb_row,
 430                                int count
 431                               )
 432 {
 433
 434     VP8_COMMON *const cm = & cpi->common;
 435     MACROBLOCKD *const xd = & x->e_mbd;
 436     int i;
 437     (void) mb_row;
 438
 439     for (i = 0; i < count; i++)
 440     {
 441         MACROBLOCK *mb = & mbr_ei[i].mb;
 442         MACROBLOCKD *mbd = &mb->e_mbd;
 443
 444         mbd->subpixel_predict        = xd->subpixel_predict;
 445         mbd->subpixel_predict8x4     = xd->subpixel_predict8x4;
 446         mbd->subpixel_predict8x8     = xd->subpixel_predict8x8;
 447         mbd->subpixel_predict16x16   = xd->subpixel_predict16x16;
 448         mb->gf_active_ptr            = x->gf_active_ptr;
 449
 450         vpx_memset(mbr_ei[i].segment_counts, 0, sizeof(mbr_ei[i].segment_counts));
 451         mbr_ei[i].totalrate = 0;
 452
 453         mb->partition_info = x->pi + x->e_mbd.mode_info_stride * (i + 1);
 454
 455         mbd->mode_info_context = cm->mi   + x->e_mbd.mode_info_stride * (i + 1);
 456         mbd->mode_info_stride  = cm->mode_info_stride;
 457
 458         mbd->frame_type = cm->frame_type;
 459
 460         mb->src = * cpi->Source;
 461         mbd->pre = cm->yv12_fb[cm->lst_fb_idx];
 462         mbd->dst = cm->yv12_fb[cm->new_fb_idx];
 463
 464         mb->src.y_buffer += 16 * x->src.y_stride * (i + 1);
 465         mb->src.u_buffer +=  8 * x->src.uv_stride * (i + 1);
 466         mb->src.v_buffer +=  8 * x->src.uv_stride * (i + 1);
 467
 468         vp8_build_block_offsets(mb);
 469
 470         vp8_setup_block_dptrs(mbd);
 471
 472         vp8_setup_block_ptrs(mb);
 473
 474         mbd->left_context = &cm->left_context;
 475         mb->mvc = cm->fc.mvc;
 476
 477         setup_mbby_copy(&mbr_ei[i].mb, x);
 478
 479         mbd->fullpixel_mask = 0xffffffff;
 480         if(cm->full_pixel)
 481             mbd->fullpixel_mask = 0xfffffff8;
 482     }
 483 }
 484
 485 void vp8cx_create_encoder_threads(VP8_COMP *cpi)
 486 {
 487     const VP8_COMMON * cm = &cpi->common;
 488
 489     cpi->b_multi_threaded = 0;
 490     cpi->encoding_thread_count = 0;
 491     cpi->b_lpf_running = 0;
 492
 493     if (cm->processor_core_count > 1 && cpi->oxcf.multi_threaded > 1)
 494     {
 495         int ithread;
 496         int th_count = cpi->oxcf.multi_threaded - 1;
 497
 498         /* don't allocate more threads than cores available */
 499         if (cpi->oxcf.multi_threaded > cm->processor_core_count)
 500             th_count = cm->processor_core_count - 1;
 501
 502         /* we have th_count + 1 (main) threads processing one row each */
 503         /* no point to have more threads than the sync range allows */
 504         if(th_count > ((cm->mb_cols / cpi->mt_sync_range) - 1))
 505         {
 506             th_count = (cm->mb_cols / cpi->mt_sync_range) - 1;
 507         }
 508
 509         if(th_count == 0)
 510             return;
 511
 512         CHECK_MEM_ERROR(cpi->h_encoding_thread, vpx_malloc(sizeof(pthread_t) * th_count));
 513         CHECK_MEM_ERROR(cpi->h_event_start_encoding, vpx_malloc(sizeof(sem_t) * th_count));
 514         CHECK_MEM_ERROR(cpi->mb_row_ei, vpx_memalign(32, sizeof(MB_ROW_COMP) * th_count));
 515         vpx_memset(cpi->mb_row_ei, 0, sizeof(MB_ROW_COMP) * th_count);
 516         CHECK_MEM_ERROR(cpi->en_thread_data,
 517                         vpx_malloc(sizeof(ENCODETHREAD_DATA) * th_count));
 518         CHECK_MEM_ERROR(cpi->mt_current_mb_col,
 519                         vpx_malloc(sizeof(*cpi->mt_current_mb_col) * cm->mb_rows));
 520
 521         sem_init(&cpi->h_event_end_encoding, 0, 0);
 522
 523         cpi->b_multi_threaded = 1;
 524         cpi->encoding_thread_count = th_count;
 525
 526         /*
 527         printf("[VP8:] multi_threaded encoding is enabled with %d threads\n\n",
 528                (cpi->encoding_thread_count +1));
 529         */
 530
 531         for (ithread = 0; ithread < th_count; ithread++)
 532         {
 533             ENCODETHREAD_DATA * ethd = &cpi->en_thread_data[ithread];
 534
 535             sem_init(&cpi->h_event_start_encoding[ithread], 0, 0);
 536             ethd->ithread = ithread;
 537             ethd->ptr1 = (void *)cpi;
 538             ethd->ptr2 = (void *)&cpi->mb_row_ei[ithread];
 539
 540             pthread_create(&cpi->h_encoding_thread[ithread], 0, thread_encoding_proc, ethd);
 541         }
 542
 543         {
 544             LPFTHREAD_DATA * lpfthd = &cpi->lpf_thread_data;
 545
 546             sem_init(&cpi->h_event_start_lpf, 0, 0);
 547             sem_init(&cpi->h_event_end_lpf, 0, 0);
 548
 549             lpfthd->ptr1 = (void *)cpi;
 550             pthread_create(&cpi->h_filter_thread, 0, thread_loopfilter, lpfthd);
 551         }
 552     }
 553
 554 }
 555
 556 void vp8cx_remove_encoder_threads(VP8_COMP *cpi)
 557 {
 558     if (cpi->b_multi_threaded)
 559     {
 560         //shutdown other threads
 561         cpi->b_multi_threaded = 0;
 562         {
 563             int i;
 564
 565             for (i = 0; i < cpi->encoding_thread_count; i++)
 566             {
 567                 //SetEvent(cpi->h_event_mbrencoding[i]);
 568                 sem_post(&cpi->h_event_start_encoding[i]);
 569                 pthread_join(cpi->h_encoding_thread[i], 0);
 570
 571                 sem_destroy(&cpi->h_event_start_encoding[i]);
 572             }
 573
 574             sem_post(&cpi->h_event_start_lpf);
 575             pthread_join(cpi->h_filter_thread, 0);
 576         }
 577
 578         sem_destroy(&cpi->h_event_end_encoding);
 579         sem_destroy(&cpi->h_event_end_lpf);
 580         sem_destroy(&cpi->h_event_start_lpf);
 581
 582         //free thread related resources
 583         vpx_free(cpi->h_event_start_encoding);
 584         vpx_free(cpi->h_encoding_thread);
 585         vpx_free(cpi->mb_row_ei);
 586         vpx_free(cpi->en_thread_data);
 587         vpx_free(cpi->mt_current_mb_col);
 588     }
 589 }
 590 #endif