Move libvpx from DEPS to src

third_party/libvpx/source/libvpx/vp8/encoder/ethreading.c

Index: third_party/libvpx/source/libvpx/vp8/encoder/ethreading.c
diff --git a/third_party/libvpx/source/libvpx/vp8/encoder/ethreading.c b/third_party/libvpx/source/libvpx/vp8/encoder/ethreading.c
new file mode 100644
index 0000000000000000000000000000000000000000..977b0b0321e09c2b48e300cf3f4d276cd5dbad47
--- /dev/null
+++ b/third_party/libvpx/source/libvpx/vp8/encoder/ethreading.c
@@ -0,0 +1,672 @@
+/*
+ *  Copyright (c) 2010 The WebM project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include "onyx_int.h"
+#include "vp8/common/threading.h"
+#include "vp8/common/common.h"
+#include "vp8/common/extend.h"
+#include "bitstream.h"
+#include "encodeframe.h"
+
+#if CONFIG_MULTITHREAD
+
+extern void vp8cx_mb_init_quantizer(VP8_COMP *cpi, MACROBLOCK *x, int ok_to_skip);
+
+extern void vp8_loopfilter_frame(VP8_COMP *cpi, VP8_COMMON *cm);
+
+static THREAD_FUNCTION thread_loopfilter(void *p_data)
+{
+    VP8_COMP *cpi = (VP8_COMP *)(((LPFTHREAD_DATA *)p_data)->ptr1);
+    VP8_COMMON *cm = &cpi->common;
+
+    while (1)
+    {
+        if (cpi->b_multi_threaded == 0)
+            break;
+
+        if (sem_wait(&cpi->h_event_start_lpf) == 0)
+        {
+            if (cpi->b_multi_threaded == 0) /* we're shutting down */
+                break;
+
+            vp8_loopfilter_frame(cpi, cm);
+
+            sem_post(&cpi->h_event_end_lpf);
+        }
+    }
+
+    return 0;
+}
+
+static
+THREAD_FUNCTION thread_encoding_proc(void *p_data)
+{
+    int ithread = ((ENCODETHREAD_DATA *)p_data)->ithread;
+    VP8_COMP *cpi = (VP8_COMP *)(((ENCODETHREAD_DATA *)p_data)->ptr1);
+    MB_ROW_COMP *mbri = (MB_ROW_COMP *)(((ENCODETHREAD_DATA *)p_data)->ptr2);
+    ENTROPY_CONTEXT_PLANES mb_row_left_context;
+
+    while (1)
+    {
+        if (cpi->b_multi_threaded == 0)
+            break;
+
+        if (sem_wait(&cpi->h_event_start_encoding[ithread]) == 0)
+        {
+            const int nsync = cpi->mt_sync_range;
+            VP8_COMMON *cm = &cpi->common;
+            int mb_row;
+            MACROBLOCK *x = &mbri->mb;
+            MACROBLOCKD *xd = &x->e_mbd;
+            TOKENEXTRA *tp ;
+#if CONFIG_REALTIME_ONLY & CONFIG_ONTHEFLY_BITPACKING
+            TOKENEXTRA *tp_start = cpi->tok + (1 + ithread) * (16 * 24);
+            const int num_part = (1 << cm->multi_token_partition);
+#endif
+
+            int *segment_counts = mbri->segment_counts;
+            int *totalrate = &mbri->totalrate;
+
+            if (cpi->b_multi_threaded == 0) /* we're shutting down */
+                break;
+
+            for (mb_row = ithread + 1; mb_row < cm->mb_rows; mb_row += (cpi->encoding_thread_count + 1))
+            {
+
+                int recon_yoffset, recon_uvoffset;
+                int mb_col;
+                int ref_fb_idx = cm->lst_fb_idx;
+                int dst_fb_idx = cm->new_fb_idx;
+                int recon_y_stride = cm->yv12_fb[ref_fb_idx].y_stride;
+                int recon_uv_stride = cm->yv12_fb[ref_fb_idx].uv_stride;
+                int map_index = (mb_row * cm->mb_cols);
+                volatile const int *last_row_current_mb_col;
+                volatile int *current_mb_col = &cpi->mt_current_mb_col[mb_row];
+
+#if  (CONFIG_REALTIME_ONLY & CONFIG_ONTHEFLY_BITPACKING)
+                vp8_writer *w = &cpi->bc[1 + (mb_row % num_part)];
+#else
+                tp = cpi->tok + (mb_row * (cm->mb_cols * 16 * 24));
+                cpi->tplist[mb_row].start = tp;
+#endif
+
+                last_row_current_mb_col = &cpi->mt_current_mb_col[mb_row - 1];
+
+                /* reset above block coeffs */
+                xd->above_context = cm->above_context;
+                xd->left_context = &mb_row_left_context;
+
+                vp8_zero(mb_row_left_context);
+
+                xd->up_available = (mb_row != 0);
+                recon_yoffset = (mb_row * recon_y_stride * 16);
+                recon_uvoffset = (mb_row * recon_uv_stride * 8);
+
+                /* Set the mb activity pointer to the start of the row. */
+                x->mb_activity_ptr = &cpi->mb_activity_map[map_index];
+
+                /* for each macroblock col in image */
+                for (mb_col = 0; mb_col < cm->mb_cols; mb_col++)
+                {
+                    *current_mb_col = mb_col - 1;
+
+                    if ((mb_col & (nsync - 1)) == 0)
+                    {
+                        while (mb_col > (*last_row_current_mb_col - nsync))
+                        {
+                            x86_pause_hint();
+                            thread_sleep(0);
+                        }
+                    }
+
+#if CONFIG_REALTIME_ONLY & CONFIG_ONTHEFLY_BITPACKING
+                    tp = tp_start;
+#endif
+
+                    /* Distance of Mb to the various image edges.
+                     * These specified to 8th pel as they are always compared
+                     * to values that are in 1/8th pel units
+                     */
+                    xd->mb_to_left_edge = -((mb_col * 16) << 3);
+                    xd->mb_to_right_edge = ((cm->mb_cols - 1 - mb_col) * 16) << 3;
+                    xd->mb_to_top_edge = -((mb_row * 16) << 3);
+                    xd->mb_to_bottom_edge = ((cm->mb_rows - 1 - mb_row) * 16) << 3;
+
+                    /* Set up limit values for motion vectors used to prevent
+                     * them extending outside the UMV borders
+                     */
+                    x->mv_col_min = -((mb_col * 16) + (VP8BORDERINPIXELS - 16));
+                    x->mv_col_max = ((cm->mb_cols - 1 - mb_col) * 16) + (VP8BORDERINPIXELS - 16);
+                    x->mv_row_min = -((mb_row * 16) + (VP8BORDERINPIXELS - 16));
+                    x->mv_row_max = ((cm->mb_rows - 1 - mb_row) * 16) + (VP8BORDERINPIXELS - 16);
+
+                    xd->dst.y_buffer = cm->yv12_fb[dst_fb_idx].y_buffer + recon_yoffset;
+                    xd->dst.u_buffer = cm->yv12_fb[dst_fb_idx].u_buffer + recon_uvoffset;
+                    xd->dst.v_buffer = cm->yv12_fb[dst_fb_idx].v_buffer + recon_uvoffset;
+                    xd->left_available = (mb_col != 0);
+
+                    x->rddiv = cpi->RDDIV;
+                    x->rdmult = cpi->RDMULT;
+
+                    /* Copy current mb to a buffer */
+                    vp8_copy_mem16x16(x->src.y_buffer, x->src.y_stride, x->thismb, 16);
+
+                    if (cpi->oxcf.tuning == VP8_TUNE_SSIM)
+                        vp8_activity_masking(cpi, x);
+
+                    /* Is segmentation enabled */
+                    /* MB level adjustment to quantizer */
+                    if (xd->segmentation_enabled)
+                    {
+                        /* Code to set segment id in xd->mbmi.segment_id for
+                         * current MB (with range checking)
+                         */
+                        if (cpi->segmentation_map[map_index + mb_col] <= 3)
+                            xd->mode_info_context->mbmi.segment_id = cpi->segmentation_map[map_index + mb_col];
+                        else
+                            xd->mode_info_context->mbmi.segment_id = 0;
+
+                        vp8cx_mb_init_quantizer(cpi, x, 1);
+                    }
+                    else
+                        /* Set to Segment 0 by default */
+                        xd->mode_info_context->mbmi.segment_id = 0;
+
+                    x->active_ptr = cpi->active_map + map_index + mb_col;
+
+                    if (cm->frame_type == KEY_FRAME)
+                    {
+                        *totalrate += vp8cx_encode_intra_macroblock(cpi, x, &tp);
+#ifdef MODE_STATS
+                        y_modes[xd->mbmi.mode] ++;
+#endif
+                    }
+                    else
+                    {
+                        *totalrate += vp8cx_encode_inter_macroblock(cpi, x, &tp, recon_yoffset, recon_uvoffset, mb_row, mb_col);
+
+#ifdef MODE_STATS
+                        inter_y_modes[xd->mbmi.mode] ++;
+
+                        if (xd->mbmi.mode == SPLITMV)
+                        {
+                            int b;
+
+                            for (b = 0; b < xd->mbmi.partition_count; b++)
+                            {
+                                inter_b_modes[x->partition->bmi[b].mode] ++;
+                            }
+                        }
+
+#endif
+                        // Keep track of how many (consecutive) times a  block
+                        // is coded as ZEROMV_LASTREF, for base layer frames.
+                        // Reset to 0 if its coded as anything else.
+                        if (cpi->current_layer == 0) {
+                          if (xd->mode_info_context->mbmi.mode == ZEROMV &&
+                              xd->mode_info_context->mbmi.ref_frame ==
+                                  LAST_FRAME) {
+                            // Increment, check for wrap-around.
+                            if (cpi->consec_zero_last[map_index+mb_col] < 255)
+                              cpi->consec_zero_last[map_index+mb_col] += 1;
+                            if (cpi->consec_zero_last_mvbias[map_index+mb_col] < 255)
+                              cpi->consec_zero_last_mvbias[map_index+mb_col] += 1;
+                          } else {
+                            cpi->consec_zero_last[map_index+mb_col] = 0;
+                            cpi->consec_zero_last_mvbias[map_index+mb_col] = 0;
+                          }
+                          if (x->zero_last_dot_suppress)
+                            cpi->consec_zero_last_mvbias[map_index+mb_col] = 0;
+                        }
+
+                        /* Special case code for cyclic refresh
+                         * If cyclic update enabled then copy
+                         * xd->mbmi.segment_id; (which may have been updated
+                         * based on mode during
+                         * vp8cx_encode_inter_macroblock()) back into the
+                         * global segmentation map
+                         */
+                        if ((cpi->current_layer == 0) &&
+                            (cpi->cyclic_refresh_mode_enabled &&
+                             xd->segmentation_enabled))
+                        {
+                            const MB_MODE_INFO * mbmi = &xd->mode_info_context->mbmi;
+                            cpi->segmentation_map[map_index + mb_col] = mbmi->segment_id;
+
+                            /* 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):
+                             * 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) else
+                             * mark it as dirty (1).
+                             */
+                            if (mbmi->segment_id)
+                                cpi->cyclic_refresh_map[map_index + mb_col] = -1;
+                            else if ((mbmi->mode == ZEROMV) && (mbmi->ref_frame == LAST_FRAME))
+                            {
+                                if (cpi->cyclic_refresh_map[map_index + mb_col] == 1)
+                                    cpi->cyclic_refresh_map[map_index + mb_col] = 0;
+                            }
+                            else
+                                cpi->cyclic_refresh_map[map_index + mb_col] = 1;
+
+                        }
+                    }
+
+#if CONFIG_REALTIME_ONLY & CONFIG_ONTHEFLY_BITPACKING
+                    /* pack tokens for this MB */
+                    {
+                        int tok_count = tp - tp_start;
+                        vp8_pack_tokens(w, tp_start, tok_count);
+                    }
+#else
+                    cpi->tplist[mb_row].stop = tp;
+#endif
+                    /* Increment pointer into gf usage flags structure. */
+                    x->gf_active_ptr++;
+
+                    /* Increment the activity mask pointers. */
+                    x->mb_activity_ptr++;
+
+                    /* adjust to the next column of macroblocks */
+                    x->src.y_buffer += 16;
+                    x->src.u_buffer += 8;
+                    x->src.v_buffer += 8;
+
+                    recon_yoffset += 16;
+                    recon_uvoffset += 8;
+
+                    /* Keep track of segment usage */
+                    segment_counts[xd->mode_info_context->mbmi.segment_id]++;
+
+                    /* skip to next mb */
+                    xd->mode_info_context++;
+                    x->partition_info++;
+                    xd->above_context++;
+                }
+
+                vp8_extend_mb_row( &cm->yv12_fb[dst_fb_idx],
+                                    xd->dst.y_buffer + 16,
+                                    xd->dst.u_buffer + 8,
+                                    xd->dst.v_buffer + 8);
+
+                *current_mb_col = mb_col + nsync;
+
+                /* this is to account for the border */
+                xd->mode_info_context++;
+                x->partition_info++;
+
+                x->src.y_buffer += 16 * x->src.y_stride * (cpi->encoding_thread_count + 1) - 16 * cm->mb_cols;
+                x->src.u_buffer += 8 * x->src.uv_stride * (cpi->encoding_thread_count + 1) - 8 * cm->mb_cols;
+                x->src.v_buffer += 8 * x->src.uv_stride * (cpi->encoding_thread_count + 1) - 8 * cm->mb_cols;
+
+                xd->mode_info_context += xd->mode_info_stride * cpi->encoding_thread_count;
+                x->partition_info += xd->mode_info_stride * cpi->encoding_thread_count;
+                x->gf_active_ptr   += cm->mb_cols * cpi->encoding_thread_count;
+
+                if (mb_row == cm->mb_rows - 1)
+                {
+                    sem_post(&cpi->h_event_end_encoding); /* signal frame encoding end */
+                }
+            }
+        }
+    }
+
+    /* printf("exit thread %d\n", ithread); */
+    return 0;
+}
+
+static void setup_mbby_copy(MACROBLOCK *mbdst, MACROBLOCK *mbsrc)
+{
+
+    MACROBLOCK *x = mbsrc;
+    MACROBLOCK *z = mbdst;
+    int i;
+
+    z->ss               = x->ss;
+    z->ss_count          = x->ss_count;
+    z->searches_per_step  = x->searches_per_step;
+    z->errorperbit      = x->errorperbit;
+
+    z->sadperbit16      = x->sadperbit16;
+    z->sadperbit4       = x->sadperbit4;
+
+    /*
+    z->mv_col_min    = x->mv_col_min;
+    z->mv_col_max    = x->mv_col_max;
+    z->mv_row_min    = x->mv_row_min;
+    z->mv_row_max    = x->mv_row_max;
+    */
+
+    z->short_fdct4x4     = x->short_fdct4x4;
+    z->short_fdct8x4     = x->short_fdct8x4;
+    z->short_walsh4x4    = x->short_walsh4x4;
+    z->quantize_b        = x->quantize_b;
+    z->optimize          = x->optimize;
+
+    /*
+    z->mvc              = x->mvc;
+    z->src.y_buffer      = x->src.y_buffer;
+    z->src.u_buffer      = x->src.u_buffer;
+    z->src.v_buffer      = x->src.v_buffer;
+    */
+
+    z->mvcost[0] =  x->mvcost[0];
+    z->mvcost[1] =  x->mvcost[1];
+    z->mvsadcost[0] =  x->mvsadcost[0];
+    z->mvsadcost[1] =  x->mvsadcost[1];
+
+    z->token_costs = x->token_costs;
+    z->inter_bmode_costs = x->inter_bmode_costs;
+    z->mbmode_cost = x->mbmode_cost;
+    z->intra_uv_mode_cost = x->intra_uv_mode_cost;
+    z->bmode_costs = x->bmode_costs;
+
+    for (i = 0; i < 25; i++)
+    {
+        z->block[i].quant           = x->block[i].quant;
+        z->block[i].quant_fast      = x->block[i].quant_fast;
+        z->block[i].quant_shift     = x->block[i].quant_shift;
+        z->block[i].zbin            = x->block[i].zbin;
+        z->block[i].zrun_zbin_boost = x->block[i].zrun_zbin_boost;
+        z->block[i].round           = x->block[i].round;
+        z->block[i].src_stride      = x->block[i].src_stride;
+    }
+
+    z->q_index           = x->q_index;
+    z->act_zbin_adj      = x->act_zbin_adj;
+    z->last_act_zbin_adj = x->last_act_zbin_adj;
+
+    {
+        MACROBLOCKD *xd = &x->e_mbd;
+        MACROBLOCKD *zd = &z->e_mbd;
+
+        /*
+        zd->mode_info_context = xd->mode_info_context;
+        zd->mode_info        = xd->mode_info;
+
+        zd->mode_info_stride  = xd->mode_info_stride;
+        zd->frame_type       = xd->frame_type;
+        zd->up_available     = xd->up_available   ;
+        zd->left_available   = xd->left_available;
+        zd->left_context     = xd->left_context;
+        zd->last_frame_dc     = xd->last_frame_dc;
+        zd->last_frame_dccons = xd->last_frame_dccons;
+        zd->gold_frame_dc     = xd->gold_frame_dc;
+        zd->gold_frame_dccons = xd->gold_frame_dccons;
+        zd->mb_to_left_edge    = xd->mb_to_left_edge;
+        zd->mb_to_right_edge   = xd->mb_to_right_edge;
+        zd->mb_to_top_edge     = xd->mb_to_top_edge   ;
+        zd->mb_to_bottom_edge  = xd->mb_to_bottom_edge;
+        zd->gf_active_ptr     = xd->gf_active_ptr;
+        zd->frames_since_golden       = xd->frames_since_golden;
+        zd->frames_till_alt_ref_frame   = xd->frames_till_alt_ref_frame;
+        */
+        zd->subpixel_predict         = xd->subpixel_predict;
+        zd->subpixel_predict8x4      = xd->subpixel_predict8x4;
+        zd->subpixel_predict8x8      = xd->subpixel_predict8x8;
+        zd->subpixel_predict16x16    = xd->subpixel_predict16x16;
+        zd->segmentation_enabled     = xd->segmentation_enabled;
+        zd->mb_segement_abs_delta      = xd->mb_segement_abs_delta;
+        memcpy(zd->segment_feature_data, xd->segment_feature_data,
+               sizeof(xd->segment_feature_data));
+
+        memcpy(zd->dequant_y1_dc, xd->dequant_y1_dc, sizeof(xd->dequant_y1_dc));
+        memcpy(zd->dequant_y1, xd->dequant_y1, sizeof(xd->dequant_y1));
+        memcpy(zd->dequant_y2, xd->dequant_y2, sizeof(xd->dequant_y2));
+        memcpy(zd->dequant_uv, xd->dequant_uv, sizeof(xd->dequant_uv));
+
+#if 1
+        /*TODO:  Remove dequant from BLOCKD.  This is a temporary solution until
+         * the quantizer code uses a passed in pointer to the dequant constants.
+         * This will also require modifications to the x86 and neon assembly.
+         * */
+        for (i = 0; i < 16; i++)
+            zd->block[i].dequant = zd->dequant_y1;
+        for (i = 16; i < 24; i++)
+            zd->block[i].dequant = zd->dequant_uv;
+        zd->block[24].dequant = zd->dequant_y2;
+#endif
+
+
+        memcpy(z->rd_threshes, x->rd_threshes, sizeof(x->rd_threshes));
+        memcpy(z->rd_thresh_mult, x->rd_thresh_mult, sizeof(x->rd_thresh_mult));
+
+        z->zbin_over_quant = x->zbin_over_quant;
+        z->zbin_mode_boost_enabled = x->zbin_mode_boost_enabled;
+        z->zbin_mode_boost = x->zbin_mode_boost;
+
+        memset(z->error_bins, 0, sizeof(z->error_bins));
+    }
+}
+
+void vp8cx_init_mbrthread_data(VP8_COMP *cpi,
+                               MACROBLOCK *x,
+                               MB_ROW_COMP *mbr_ei,
+                               int count
+                              )
+{
+
+    VP8_COMMON *const cm = & cpi->common;
+    MACROBLOCKD *const xd = & x->e_mbd;
+    int i;
+
+    for (i = 0; i < count; i++)
+    {
+        MACROBLOCK *mb = & mbr_ei[i].mb;
+        MACROBLOCKD *mbd = &mb->e_mbd;
+
+        mbd->subpixel_predict        = xd->subpixel_predict;
+        mbd->subpixel_predict8x4     = xd->subpixel_predict8x4;
+        mbd->subpixel_predict8x8     = xd->subpixel_predict8x8;
+        mbd->subpixel_predict16x16   = xd->subpixel_predict16x16;
+        mb->gf_active_ptr            = x->gf_active_ptr;
+
+        memset(mbr_ei[i].segment_counts, 0, sizeof(mbr_ei[i].segment_counts));
+        mbr_ei[i].totalrate = 0;
+
+        mb->partition_info = x->pi + x->e_mbd.mode_info_stride * (i + 1);
+
+        mbd->mode_info_context = cm->mi   + x->e_mbd.mode_info_stride * (i + 1);
+        mbd->mode_info_stride  = cm->mode_info_stride;
+
+        mbd->frame_type = cm->frame_type;
+
+        mb->src = * cpi->Source;
+        mbd->pre = cm->yv12_fb[cm->lst_fb_idx];
+        mbd->dst = cm->yv12_fb[cm->new_fb_idx];
+
+        mb->src.y_buffer += 16 * x->src.y_stride * (i + 1);
+        mb->src.u_buffer +=  8 * x->src.uv_stride * (i + 1);
+        mb->src.v_buffer +=  8 * x->src.uv_stride * (i + 1);
+
+        vp8_build_block_offsets(mb);
+
+        mbd->left_context = &cm->left_context;
+        mb->mvc = cm->fc.mvc;
+
+        setup_mbby_copy(&mbr_ei[i].mb, x);
+
+        mbd->fullpixel_mask = 0xffffffff;
+        if(cm->full_pixel)
+            mbd->fullpixel_mask = 0xfffffff8;
+
+        vp8_zero(mb->coef_counts);
+        vp8_zero(x->ymode_count);
+        mb->skip_true_count = 0;
+        vp8_zero(mb->MVcount);
+        mb->prediction_error = 0;
+        mb->intra_error = 0;
+        vp8_zero(mb->count_mb_ref_frame_usage);
+        mb->mbs_tested_so_far = 0;
+        mb->mbs_zero_last_dot_suppress = 0;
+    }
+}
+
+int vp8cx_create_encoder_threads(VP8_COMP *cpi)
+{
+    const VP8_COMMON * cm = &cpi->common;
+
+    cpi->b_multi_threaded = 0;
+    cpi->encoding_thread_count = 0;
+    cpi->b_lpf_running = 0;
+
+    if (cm->processor_core_count > 1 && cpi->oxcf.multi_threaded > 1)
+    {
+        int ithread;
+        int th_count = cpi->oxcf.multi_threaded - 1;
+        int rc = 0;
+
+        /* don't allocate more threads than cores available */
+        if (cpi->oxcf.multi_threaded > cm->processor_core_count)
+            th_count = cm->processor_core_count - 1;
+
+        /* we have th_count + 1 (main) threads processing one row each */
+        /* no point to have more threads than the sync range allows */
+        if(th_count > ((cm->mb_cols / cpi->mt_sync_range) - 1))
+        {
+            th_count = (cm->mb_cols / cpi->mt_sync_range) - 1;
+        }
+
+        if(th_count == 0)
+            return 0;
+
+        CHECK_MEM_ERROR(cpi->h_encoding_thread,
+                        vpx_malloc(sizeof(pthread_t) * th_count));
+        CHECK_MEM_ERROR(cpi->h_event_start_encoding,
+                        vpx_malloc(sizeof(sem_t) * th_count));
+        CHECK_MEM_ERROR(cpi->mb_row_ei,
+                        vpx_memalign(32, sizeof(MB_ROW_COMP) * th_count));
+        memset(cpi->mb_row_ei, 0, sizeof(MB_ROW_COMP) * th_count);
+        CHECK_MEM_ERROR(cpi->en_thread_data,
+                        vpx_malloc(sizeof(ENCODETHREAD_DATA) * th_count));
+
+        sem_init(&cpi->h_event_end_encoding, 0, 0);
+
+        cpi->b_multi_threaded = 1;
+        cpi->encoding_thread_count = th_count;
+
+        /*
+        printf("[VP8:] multi_threaded encoding is enabled with %d threads\n\n",
+               (cpi->encoding_thread_count +1));
+        */
+
+        for (ithread = 0; ithread < th_count; ithread++)
+        {
+            ENCODETHREAD_DATA *ethd = &cpi->en_thread_data[ithread];
+
+            /* Setup block ptrs and offsets */
+            vp8_setup_block_ptrs(&cpi->mb_row_ei[ithread].mb);
+            vp8_setup_block_dptrs(&cpi->mb_row_ei[ithread].mb.e_mbd);
+
+            sem_init(&cpi->h_event_start_encoding[ithread], 0, 0);
+
+            ethd->ithread = ithread;
+            ethd->ptr1 = (void *)cpi;
+            ethd->ptr2 = (void *)&cpi->mb_row_ei[ithread];
+
+            rc = pthread_create(&cpi->h_encoding_thread[ithread], 0,
+                                thread_encoding_proc, ethd);
+            if(rc)
+                break;
+        }
+
+        if(rc)
+        {
+            /* shutdown other threads */
+            cpi->b_multi_threaded = 0;
+            for(--ithread; ithread >= 0; ithread--)
+            {
+                pthread_join(cpi->h_encoding_thread[ithread], 0);
+                sem_destroy(&cpi->h_event_start_encoding[ithread]);
+            }
+            sem_destroy(&cpi->h_event_end_encoding);
+
+            /* free thread related resources */
+            vpx_free(cpi->h_event_start_encoding);
+            vpx_free(cpi->h_encoding_thread);
+            vpx_free(cpi->mb_row_ei);
+            vpx_free(cpi->en_thread_data);
+
+            return -1;
+        }
+
+
+        {
+            LPFTHREAD_DATA * lpfthd = &cpi->lpf_thread_data;
+
+            sem_init(&cpi->h_event_start_lpf, 0, 0);
+            sem_init(&cpi->h_event_end_lpf, 0, 0);
+
+            lpfthd->ptr1 = (void *)cpi;
+            rc = pthread_create(&cpi->h_filter_thread, 0, thread_loopfilter,
+                                lpfthd);
+
+            if(rc)
+            {
+                /* shutdown other threads */
+                cpi->b_multi_threaded = 0;
+                for(--ithread; ithread >= 0; ithread--)
+                {
+                    sem_post(&cpi->h_event_start_encoding[ithread]);
+                    pthread_join(cpi->h_encoding_thread[ithread], 0);
+                    sem_destroy(&cpi->h_event_start_encoding[ithread]);
+                }
+                sem_destroy(&cpi->h_event_end_encoding);
+                sem_destroy(&cpi->h_event_end_lpf);
+                sem_destroy(&cpi->h_event_start_lpf);
+
+                /* free thread related resources */
+                vpx_free(cpi->h_event_start_encoding);
+                vpx_free(cpi->h_encoding_thread);
+                vpx_free(cpi->mb_row_ei);
+                vpx_free(cpi->en_thread_data);
+
+                return -2;
+            }
+        }
+    }
+    return 0;
+}
+
+void vp8cx_remove_encoder_threads(VP8_COMP *cpi)
+{
+    if (cpi->b_multi_threaded)
+    {
+        /* shutdown other threads */
+        cpi->b_multi_threaded = 0;
+        {
+            int i;
+
+            for (i = 0; i < cpi->encoding_thread_count; i++)
+            {
+                sem_post(&cpi->h_event_start_encoding[i]);
+                pthread_join(cpi->h_encoding_thread[i], 0);
+
+                sem_destroy(&cpi->h_event_start_encoding[i]);
+            }
+
+            sem_post(&cpi->h_event_start_lpf);
+            pthread_join(cpi->h_filter_thread, 0);
+        }
+
+        sem_destroy(&cpi->h_event_end_encoding);
+        sem_destroy(&cpi->h_event_end_lpf);
+        sem_destroy(&cpi->h_event_start_lpf);
+
+        /* free thread related resources */
+        vpx_free(cpi->h_event_start_encoding);
+        vpx_free(cpi->h_encoding_thread);
+        vpx_free(cpi->mb_row_ei);
+        vpx_free(cpi->en_thread_data);
+    }
+}
+#endif