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 #if CONFIG_MULTITHREAD
  17
  18 extern int vp8cx_encode_inter_macroblock(VP8_COMP *cpi, MACROBLOCK *x,
  19                                          TOKENEXTRA **t, int recon_yoffset,
  20                                          int recon_uvoffset);
  21 extern int vp8cx_encode_intra_macro_block(VP8_COMP *cpi, MACROBLOCK *x,
  22                                           TOKENEXTRA **t);
  23 extern void vp8cx_mb_init_quantizer(VP8_COMP *cpi, MACROBLOCK *x);
  24 extern void vp8_build_block_offsets(MACROBLOCK *x);
  25 extern void vp8_setup_block_ptrs(MACROBLOCK *x);
  26
  27 extern void loopfilter_frame(VP8_COMP *cpi, VP8_COMMON *cm);
  28
  29 static THREAD_FUNCTION loopfilter_thread(void *p_data)
  30 {
  31     VP8_COMP *cpi = (VP8_COMP *)(((LPFTHREAD_DATA *)p_data)->ptr1);
  32     VP8_COMMON *cm = &cpi->common;
  33
  34     while (1)
  35     {
  36         if (cpi->b_multi_threaded == 0)
  37             break;
  38
  39         if (sem_wait(&cpi->h_event_start_lpf) == 0)
  40         {
  41             if (cpi->b_multi_threaded == FALSE) // we're shutting down
  42                 break;
  43
  44             loopfilter_frame(cpi, cm);
  45
  46             sem_post(&cpi->h_event_end_lpf);
  47         }
  48     }
  49
  50     return 0;
  51 }
  52
  53 static
  54 THREAD_FUNCTION thread_encoding_proc(void *p_data)
  55 {
  56     int ithread = ((ENCODETHREAD_DATA *)p_data)->ithread;
  57     VP8_COMP *cpi = (VP8_COMP *)(((ENCODETHREAD_DATA *)p_data)->ptr1);
  58     MB_ROW_COMP *mbri = (MB_ROW_COMP *)(((ENCODETHREAD_DATA *)p_data)->ptr2);
  59     ENTROPY_CONTEXT_PLANES mb_row_left_context;
  60
  61     const int nsync = cpi->mt_sync_range;
  62     //printf("Started thread %d\n", ithread);
  63
  64     while (1)
  65     {
  66         if (cpi->b_multi_threaded == 0)
  67             break;
  68
  69         //if(WaitForSingleObject(cpi->h_event_mbrencoding[ithread], INFINITE) == WAIT_OBJECT_0)
  70         if (sem_wait(&cpi->h_event_start_encoding[ithread]) == 0)
  71         {
  72             VP8_COMMON *cm = &cpi->common;
  73             int mb_row;
  74             MACROBLOCK *x = &mbri->mb;
  75             MACROBLOCKD *xd = &x->e_mbd;
  76             TOKENEXTRA *tp ;
  77
  78             int *segment_counts = mbri->segment_counts;
  79             int *totalrate = &mbri->totalrate;
  80
  81             if (cpi->b_multi_threaded == FALSE) // we're shutting down
  82                 break;
  83
  84             for (mb_row = ithread + 1; mb_row < cm->mb_rows; mb_row += (cpi->encoding_thread_count + 1))
  85             {
  86
  87                 int i;
  88                 int recon_yoffset, recon_uvoffset;
  89                 int mb_col;
  90                 int ref_fb_idx = cm->lst_fb_idx;
  91                 int dst_fb_idx = cm->new_fb_idx;
  92                 int recon_y_stride = cm->yv12_fb[ref_fb_idx].y_stride;
  93                 int recon_uv_stride = cm->yv12_fb[ref_fb_idx].uv_stride;
  94                 volatile int *last_row_current_mb_col;
  95                 INT64 activity_sum = 0;
  96
  97                 tp = cpi->tok + (mb_row * (cm->mb_cols * 16 * 24));
  98
  99                 last_row_current_mb_col = &cpi->mt_current_mb_col[mb_row - 1];
 100
 101                 // reset above block coeffs
 102                 xd->above_context = cm->above_context;
 103                 xd->left_context = &mb_row_left_context;
 104
 105                 vp8_zero(mb_row_left_context);
 106
 107                 xd->up_available = (mb_row != 0);
 108                 recon_yoffset = (mb_row * recon_y_stride * 16);
 109                 recon_uvoffset = (mb_row * recon_uv_stride * 8);
 110
 111                 cpi->tplist[mb_row].start = tp;
 112
 113                 //printf("Thread mb_row = %d\n", mb_row);
 114
 115                 // for each macroblock col in image
 116                 for (mb_col = 0; mb_col < cm->mb_cols; mb_col++)
 117                 {
 118                     int seg_map_index = (mb_row * cm->mb_cols);
 119
 120                     if ((mb_col & (nsync - 1)) == 0)
 121                     {
 122                         while (mb_col > (*last_row_current_mb_col - nsync) && *last_row_current_mb_col != cm->mb_cols - 1)
 123                         {
 124                             x86_pause_hint();
 125                             thread_sleep(0);
 126                         }
 127                     }
 128
 129                     // Distance of Mb to the various image edges.
 130                     // These specified to 8th pel as they are always compared to values that are in 1/8th pel units
 131                     xd->mb_to_left_edge = -((mb_col * 16) << 3);
 132                     xd->mb_to_right_edge = ((cm->mb_cols - 1 - mb_col) * 16) << 3;
 133                     xd->mb_to_top_edge = -((mb_row * 16) << 3);
 134                     xd->mb_to_bottom_edge = ((cm->mb_rows - 1 - mb_row) * 16) << 3;
 135
 136                     // Set up limit values for motion vectors used to prevent them extending outside the UMV borders
 137                     x->mv_col_min = -((mb_col * 16) + (VP8BORDERINPIXELS - 16));
 138                     x->mv_col_max = ((cm->mb_cols - 1 - mb_col) * 16) + (VP8BORDERINPIXELS - 16);
 139                     x->mv_row_min = -((mb_row * 16) + (VP8BORDERINPIXELS - 16));
 140                     x->mv_row_max = ((cm->mb_rows - 1 - mb_row) * 16) + (VP8BORDERINPIXELS - 16);
 141
 142                     xd->dst.y_buffer = cm->yv12_fb[dst_fb_idx].y_buffer + recon_yoffset;
 143                     xd->dst.u_buffer = cm->yv12_fb[dst_fb_idx].u_buffer + recon_uvoffset;
 144                     xd->dst.v_buffer = cm->yv12_fb[dst_fb_idx].v_buffer + recon_uvoffset;
 145                     xd->left_available = (mb_col != 0);
 146
 147                     x->rddiv = cpi->RDDIV;
 148                     x->rdmult = cpi->RDMULT;
 149
 150                     if (cpi->oxcf.tuning == VP8_TUNE_SSIM)
 151                         activity_sum += vp8_activity_masking(cpi, x);
 152
 153                     // Is segmentation enabled
 154                     // MB level adjutment to quantizer
 155                     if (xd->segmentation_enabled)
 156                     {
 157                         // Code to set segment id in xd->mbmi.segment_id for current MB (with range checking)
 158                         if (cpi->segmentation_map[seg_map_index + mb_col] <= 3)
 159                             xd->mode_info_context->mbmi.segment_id = cpi->segmentation_map[seg_map_index + mb_col];
 160                         else
 161                             xd->mode_info_context->mbmi.segment_id = 0;
 162
 163                         vp8cx_mb_init_quantizer(cpi, x);
 164                     }
 165                     else
 166                         xd->mode_info_context->mbmi.segment_id = 0; // Set to Segment 0 by default
 167
 168                     x->active_ptr = cpi->active_map + seg_map_index + mb_col;
 169
 170                     if (cm->frame_type == KEY_FRAME)
 171                     {
 172                         *totalrate += vp8cx_encode_intra_macro_block(cpi, x, &tp);
 173 #ifdef MODE_STATS
 174                         y_modes[xd->mbmi.mode] ++;
 175 #endif
 176                     }
 177                     else
 178                     {
 179                         *totalrate += vp8cx_encode_inter_macroblock(cpi, x, &tp, recon_yoffset, recon_uvoffset);
 180
 181 #ifdef MODE_STATS
 182                         inter_y_modes[xd->mbmi.mode] ++;
 183
 184                         if (xd->mbmi.mode == SPLITMV)
 185                         {
 186                             int b;
 187
 188                             for (b = 0; b < xd->mbmi.partition_count; b++)
 189                             {
 190                                 inter_b_modes[x->partition->bmi[b].mode] ++;
 191                             }
 192                         }
 193
 194 #endif
 195
 196                         // Count of last ref frame 0,0 useage
 197                         if ((xd->mode_info_context->mbmi.mode == ZEROMV) && (xd->mode_info_context->mbmi.ref_frame == LAST_FRAME))
 198                             cpi->inter_zz_count++;
 199
 200                         // Special case code for cyclic refresh
 201                         // If cyclic update enabled then copy xd->mbmi.segment_id; (which may have been updated based on mode
 202                         // during vp8cx_encode_inter_macroblock()) back into the global sgmentation map
 203                         if (cpi->cyclic_refresh_mode_enabled && xd->segmentation_enabled)
 204                         {
 205                             const MB_MODE_INFO * mbmi = &xd->mode_info_context->mbmi;
 206                             cpi->segmentation_map[seg_map_index + mb_col] = mbmi->segment_id;
 207
 208                             // 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):
 209                             // 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)
 210                             // else mark it as dirty (1).
 211                             if (mbmi->segment_id)
 212                                 cpi->cyclic_refresh_map[seg_map_index + mb_col] = -1;
 213                             else if ((mbmi->mode == ZEROMV) && (mbmi->ref_frame == LAST_FRAME))
 214                             {
 215                                 if (cpi->cyclic_refresh_map[seg_map_index + mb_col] == 1)
 216                                     cpi->cyclic_refresh_map[seg_map_index + mb_col] = 0;
 217                             }
 218                             else
 219                                 cpi->cyclic_refresh_map[seg_map_index + mb_col] = 1;
 220
 221                         }
 222                     }
 223                     cpi->tplist[mb_row].stop = tp;
 224
 225                     x->gf_active_ptr++; // Increment pointer into gf useage flags structure for next mb
 226
 227                     for (i = 0; i < 16; i++)
 228                         vpx_memcpy(&xd->mode_info_context->bmi[i], &xd->block[i].bmi, sizeof(xd->block[i].bmi));
 229
 230                     // adjust to the next column of macroblocks
 231                     x->src.y_buffer += 16;
 232                     x->src.u_buffer += 8;
 233                     x->src.v_buffer += 8;
 234
 235                     recon_yoffset += 16;
 236                     recon_uvoffset += 8;
 237
 238                     // Keep track of segment useage
 239                     segment_counts[xd->mode_info_context->mbmi.segment_id]++;
 240
 241                     // skip to next mb
 242                     xd->mode_info_context++;
 243                     x->partition_info++;
 244                     xd->above_context++;
 245
 246                     cpi->mt_current_mb_col[mb_row] = mb_col;
 247                 }
 248
 249                 //extend the recon for intra prediction
 250                 vp8_extend_mb_row(
 251                     &cm->yv12_fb[dst_fb_idx],
 252                     xd->dst.y_buffer + 16,
 253                     xd->dst.u_buffer + 8,
 254                     xd->dst.v_buffer + 8);
 255
 256                 // this is to account for the border
 257                 xd->mode_info_context++;
 258                 x->partition_info++;
 259                 x->activity_sum += activity_sum;
 260
 261                 x->src.y_buffer += 16 * x->src.y_stride * (cpi->encoding_thread_count + 1) - 16 * cm->mb_cols;
 262                 x->src.u_buffer += 8 * x->src.uv_stride * (cpi->encoding_thread_count + 1) - 8 * cm->mb_cols;
 263                 x->src.v_buffer += 8 * x->src.uv_stride * (cpi->encoding_thread_count + 1) - 8 * cm->mb_cols;
 264
 265                 xd->mode_info_context += xd->mode_info_stride * cpi->encoding_thread_count;
 266                 x->partition_info += xd->mode_info_stride * cpi->encoding_thread_count;
 267
 268                 if (mb_row == cm->mb_rows - 1)
 269                 {
 270                     //SetEvent(cpi->h_event_main);
 271                     sem_post(&cpi->h_event_end_encoding); /* signal frame encoding end */
 272                 }
 273             }
 274         }
 275     }
 276
 277     //printf("exit thread %d\n", ithread);
 278     return 0;
 279 }
 280
 281 static void setup_mbby_copy(MACROBLOCK *mbdst, MACROBLOCK *mbsrc)
 282 {
 283
 284     MACROBLOCK *x = mbsrc;
 285     MACROBLOCK *z = mbdst;
 286     int i;
 287
 288     z->ss               = x->ss;
 289     z->ss_count          = x->ss_count;
 290     z->searches_per_step  = x->searches_per_step;
 291     z->errorperbit      = x->errorperbit;
 292
 293     z->sadperbit16      = x->sadperbit16;
 294     z->sadperbit4       = x->sadperbit4;
 295     z->errthresh        = x->errthresh;
 296
 297     /*
 298     z->mv_col_min    = x->mv_col_min;
 299     z->mv_col_max    = x->mv_col_max;
 300     z->mv_row_min    = x->mv_row_min;
 301     z->mv_row_max    = x->mv_row_max;
 302     z->vector_range = x->vector_range ;
 303     */
 304
 305     z->vp8_short_fdct4x4     = x->vp8_short_fdct4x4;
 306     z->vp8_short_fdct8x4     = x->vp8_short_fdct8x4;
 307     z->short_walsh4x4    = x->short_walsh4x4;
 308     z->quantize_b        = x->quantize_b;
 309     z->optimize          = x->optimize;
 310
 311     /*
 312     z->mvc              = x->mvc;
 313     z->src.y_buffer      = x->src.y_buffer;
 314     z->src.u_buffer      = x->src.u_buffer;
 315     z->src.v_buffer      = x->src.v_buffer;
 316     */
 317
 318
 319     vpx_memcpy(z->mvcosts,          x->mvcosts,         sizeof(x->mvcosts));
 320     z->mvcost[0] = &z->mvcosts[0][mv_max+1];
 321     z->mvcost[1] = &z->mvcosts[1][mv_max+1];
 322     z->mvsadcost[0] = &z->mvsadcosts[0][mvfp_max+1];
 323     z->mvsadcost[1] = &z->mvsadcosts[1][mvfp_max+1];
 324
 325
 326     vpx_memcpy(z->token_costs,       x->token_costs,      sizeof(x->token_costs));
 327     vpx_memcpy(z->inter_bmode_costs,  x->inter_bmode_costs, sizeof(x->inter_bmode_costs));
 328     //memcpy(z->mvcosts,            x->mvcosts,         sizeof(x->mvcosts));
 329     //memcpy(z->mvcost,         x->mvcost,          sizeof(x->mvcost));
 330     vpx_memcpy(z->mbmode_cost,       x->mbmode_cost,      sizeof(x->mbmode_cost));
 331     vpx_memcpy(z->intra_uv_mode_cost,  x->intra_uv_mode_cost, sizeof(x->intra_uv_mode_cost));
 332     vpx_memcpy(z->bmode_costs,       x->bmode_costs,      sizeof(x->bmode_costs));
 333
 334     for (i = 0; i < 25; i++)
 335     {
 336         z->block[i].quant           = x->block[i].quant;
 337         z->block[i].quant_fast      = x->block[i].quant_fast;
 338         z->block[i].quant_shift     = x->block[i].quant_shift;
 339         z->block[i].zbin            = x->block[i].zbin;
 340         z->block[i].zrun_zbin_boost   = x->block[i].zrun_zbin_boost;
 341         z->block[i].round           = x->block[i].round;
 342         /*
 343         z->block[i].src             = x->block[i].src;
 344         */
 345         z->block[i].src_stride       = x->block[i].src_stride;
 346         z->block[i].force_empty      = x->block[i].force_empty;
 347
 348     }
 349
 350     {
 351         MACROBLOCKD *xd = &x->e_mbd;
 352         MACROBLOCKD *zd = &z->e_mbd;
 353
 354         /*
 355         zd->mode_info_context = xd->mode_info_context;
 356         zd->mode_info        = xd->mode_info;
 357
 358         zd->mode_info_stride  = xd->mode_info_stride;
 359         zd->frame_type       = xd->frame_type;
 360         zd->up_available     = xd->up_available   ;
 361         zd->left_available   = xd->left_available;
 362         zd->left_context     = xd->left_context;
 363         zd->last_frame_dc     = xd->last_frame_dc;
 364         zd->last_frame_dccons = xd->last_frame_dccons;
 365         zd->gold_frame_dc     = xd->gold_frame_dc;
 366         zd->gold_frame_dccons = xd->gold_frame_dccons;
 367         zd->mb_to_left_edge    = xd->mb_to_left_edge;
 368         zd->mb_to_right_edge   = xd->mb_to_right_edge;
 369         zd->mb_to_top_edge     = xd->mb_to_top_edge   ;
 370         zd->mb_to_bottom_edge  = xd->mb_to_bottom_edge;
 371         zd->gf_active_ptr     = xd->gf_active_ptr;
 372         zd->frames_since_golden       = xd->frames_since_golden;
 373         zd->frames_till_alt_ref_frame   = xd->frames_till_alt_ref_frame;
 374         */
 375         zd->subpixel_predict         = xd->subpixel_predict;
 376         zd->subpixel_predict8x4      = xd->subpixel_predict8x4;
 377         zd->subpixel_predict8x8      = xd->subpixel_predict8x8;
 378         zd->subpixel_predict16x16    = xd->subpixel_predict16x16;
 379         zd->segmentation_enabled     = xd->segmentation_enabled;
 380         zd->mb_segement_abs_delta      = xd->mb_segement_abs_delta;
 381         vpx_memcpy(zd->segment_feature_data, xd->segment_feature_data, sizeof(xd->segment_feature_data));
 382
 383         for (i = 0; i < 25; i++)
 384         {
 385             zd->block[i].dequant = xd->block[i].dequant;
 386         }
 387     }
 388 }
 389
 390 void vp8cx_init_mbrthread_data(VP8_COMP *cpi,
 391                                MACROBLOCK *x,
 392                                MB_ROW_COMP *mbr_ei,
 393                                int mb_row,
 394                                int count
 395                               )
 396 {
 397
 398     VP8_COMMON *const cm = & cpi->common;
 399     MACROBLOCKD *const xd = & x->e_mbd;
 400     int i;
 401     (void) mb_row;
 402
 403     for (i = 0; i < count; i++)
 404     {
 405         MACROBLOCK *mb = & mbr_ei[i].mb;
 406         MACROBLOCKD *mbd = &mb->e_mbd;
 407
 408         mbd->subpixel_predict        = xd->subpixel_predict;
 409         mbd->subpixel_predict8x4     = xd->subpixel_predict8x4;
 410         mbd->subpixel_predict8x8     = xd->subpixel_predict8x8;
 411         mbd->subpixel_predict16x16   = xd->subpixel_predict16x16;
 412 #if CONFIG_RUNTIME_CPU_DETECT
 413         mbd->rtcd                   = xd->rtcd;
 414 #endif
 415         mb->gf_active_ptr            = x->gf_active_ptr;
 416
 417         mb->vector_range             = 32;
 418
 419         vpx_memset(mbr_ei[i].segment_counts, 0, sizeof(mbr_ei[i].segment_counts));
 420         mbr_ei[i].totalrate = 0;
 421
 422         mb->partition_info = x->pi + x->e_mbd.mode_info_stride * (i + 1);
 423
 424         mbd->mode_info_context = cm->mi   + x->e_mbd.mode_info_stride * (i + 1);
 425         mbd->mode_info_stride  = cm->mode_info_stride;
 426
 427         mbd->frame_type = cm->frame_type;
 428
 429         mbd->frames_since_golden = cm->frames_since_golden;
 430         mbd->frames_till_alt_ref_frame = cm->frames_till_alt_ref_frame;
 431
 432         mb->src = * cpi->Source;
 433         mbd->pre = cm->yv12_fb[cm->lst_fb_idx];
 434         mbd->dst = cm->yv12_fb[cm->new_fb_idx];
 435
 436         mb->src.y_buffer += 16 * x->src.y_stride * (i + 1);
 437         mb->src.u_buffer +=  8 * x->src.uv_stride * (i + 1);
 438         mb->src.v_buffer +=  8 * x->src.uv_stride * (i + 1);
 439
 440         vp8_build_block_offsets(mb);
 441
 442         vp8_setup_block_dptrs(mbd);
 443
 444         vp8_setup_block_ptrs(mb);
 445
 446         mb->activity_sum = 0;
 447
 448         mbd->left_context = &cm->left_context;
 449         mb->mvc = cm->fc.mvc;
 450
 451         setup_mbby_copy(&mbr_ei[i].mb, x);
 452
 453     }
 454 }
 455
 456 void vp8cx_create_encoder_threads(VP8_COMP *cpi)
 457 {
 458     const VP8_COMMON * cm = &cpi->common;
 459
 460     cpi->b_multi_threaded = 0;
 461     cpi->encoding_thread_count = 0;
 462
 463     if (cm->processor_core_count > 1 && cpi->oxcf.multi_threaded > 1)
 464     {
 465         int ithread;
 466         int th_count = cpi->oxcf.multi_threaded - 1;
 467
 468         /* don't allocate more threads than cores available */
 469         if (cpi->oxcf.multi_threaded > cm->processor_core_count)
 470             th_count = cm->processor_core_count - 1;
 471
 472         /* we have th_count + 1 (main) threads processing one row each */
 473         /* no point to have more threads than the sync range allows */
 474         if(th_count > ((cm->mb_cols / cpi->mt_sync_range) - 1))
 475         {
 476             th_count = (cm->mb_cols / cpi->mt_sync_range) - 1;
 477         }
 478
 479         if(th_count == 0)
 480             return;
 481
 482         CHECK_MEM_ERROR(cpi->h_encoding_thread, vpx_malloc(sizeof(pthread_t) * th_count));
 483         CHECK_MEM_ERROR(cpi->h_event_start_encoding, vpx_malloc(sizeof(sem_t) * th_count));
 484         CHECK_MEM_ERROR(cpi->mb_row_ei, vpx_memalign(32, sizeof(MB_ROW_COMP) * th_count));
 485         vpx_memset(cpi->mb_row_ei, 0, sizeof(MB_ROW_COMP) * th_count);
 486         CHECK_MEM_ERROR(cpi->en_thread_data,
 487                         vpx_malloc(sizeof(ENCODETHREAD_DATA) * th_count));
 488         CHECK_MEM_ERROR(cpi->mt_current_mb_col,
 489                         vpx_malloc(sizeof(*cpi->mt_current_mb_col) * cm->mb_rows));
 490
 491         sem_init(&cpi->h_event_end_encoding, 0, 0);
 492
 493         cpi->b_multi_threaded = 1;
 494         cpi->encoding_thread_count = th_count;
 495
 496         /*
 497         printf("[VP8:] multi_threaded encoding is enabled with %d threads\n\n",
 498                (cpi->encoding_thread_count +1));
 499         */
 500
 501         for (ithread = 0; ithread < th_count; ithread++)
 502         {
 503             ENCODETHREAD_DATA * ethd = &cpi->en_thread_data[ithread];
 504
 505             sem_init(&cpi->h_event_start_encoding[ithread], 0, 0);
 506             ethd->ithread = ithread;
 507             ethd->ptr1 = (void *)cpi;
 508             ethd->ptr2 = (void *)&cpi->mb_row_ei[ithread];
 509
 510             pthread_create(&cpi->h_encoding_thread[ithread], 0, thread_encoding_proc, ethd);
 511         }
 512
 513         {
 514             LPFTHREAD_DATA * lpfthd = &cpi->lpf_thread_data;
 515
 516             sem_init(&cpi->h_event_start_lpf, 0, 0);
 517             sem_init(&cpi->h_event_end_lpf, 0, 0);
 518
 519             lpfthd->ptr1 = (void *)cpi;
 520             pthread_create(&cpi->h_filter_thread, 0, loopfilter_thread, lpfthd);
 521         }
 522     }
 523
 524 }
 525
 526 void vp8cx_remove_encoder_threads(VP8_COMP *cpi)
 527 {
 528     if (cpi->b_multi_threaded)
 529     {
 530         //shutdown other threads
 531         cpi->b_multi_threaded = 0;
 532         {
 533             int i;
 534
 535             for (i = 0; i < cpi->encoding_thread_count; i++)
 536             {
 537                 //SetEvent(cpi->h_event_mbrencoding[i]);
 538                 sem_post(&cpi->h_event_start_encoding[i]);
 539                 pthread_join(cpi->h_encoding_thread[i], 0);
 540
 541                 sem_destroy(&cpi->h_event_start_encoding[i]);
 542             }
 543
 544             sem_post(&cpi->h_event_start_lpf);
 545             pthread_join(cpi->h_filter_thread, 0);
 546         }
 547
 548         sem_destroy(&cpi->h_event_end_encoding);
 549         sem_destroy(&cpi->h_event_end_lpf);
 550         sem_destroy(&cpi->h_event_start_lpf);
 551
 552         //free thread related resources
 553         vpx_free(cpi->h_event_start_encoding);
 554         vpx_free(cpi->h_encoding_thread);
 555         vpx_free(cpi->mb_row_ei);
 556         vpx_free(cpi->en_thread_data);
 557         vpx_free(cpi->mt_current_mb_col);
 558     }
 559 }
 560 #endif