vp9_ethread: fix me consts initialization to support aq_mode=3 encoding

While turning on "--aq_mode=3", the quantizers are updated by each
thread. Fixed the me consts initialization function to make sure
that the correct thread data are updated.

Change-Id: Ied27bb7bae76fc3fa2cda4f8c35ac0b46271bef4

vp9/encoder/vp9_encodeframe.c

@@ -3766,7 +3766,7 @@ static void encode_frame_internal(VP9_COMP *cpi) {
   vp9_frame_init_quantizer(cpi);
 
   vp9_initialize_rd_consts(cpi);
-  vp9_initialize_me_consts(cpi, cm->base_qindex);
+  vp9_initialize_me_consts(cpi, x, cm->base_qindex);
   init_encode_frame_mb_context(cpi);
   cm->use_prev_frame_mvs = !cm->error_resilient_mode &&
                            cm->width == cm->last_width &&

vp9/encoder/vp9_quantize.c

@@ -683,7 +683,7 @@ void vp9_init_plane_quantizers(VP9_COMP *cpi, MACROBLOCK *x) {
   x->errorperbit = rdmult >> 6;
   x->errorperbit += (x->errorperbit == 0);
 
-  vp9_initialize_me_consts(cpi, x->q_index);
+  vp9_initialize_me_consts(cpi, x, x->q_index);
 }
 
 void vp9_frame_init_quantizer(VP9_COMP *cpi) {

vp9/encoder/vp9_rd.c

@@ -204,27 +204,28 @@ static int compute_rd_thresh_factor(int qindex, vpx_bit_depth_t bit_depth) {
   return MAX((int)(pow(q, RD_THRESH_POW) * 5.12), 8);
 }
 
-void vp9_initialize_me_consts(VP9_COMP *cpi, int qindex) {
+void vp9_initialize_me_consts(VP9_COMP *cpi, MACROBLOCK *x, int qindex) {
 #if CONFIG_VP9_HIGHBITDEPTH
   switch (cpi->common.bit_depth) {
     case VPX_BITS_8:
-      cpi->td.mb.sadperbit16 = sad_per_bit16lut_8[qindex];
-      cpi->td.mb.sadperbit4 = sad_per_bit4lut_8[qindex];
+      x->sadperbit16 = sad_per_bit16lut_8[qindex];
+      x->sadperbit4 = sad_per_bit4lut_8[qindex];
       break;
     case VPX_BITS_10:
-      cpi->td.mb.sadperbit16 = sad_per_bit16lut_10[qindex];
-      cpi->td.mb.sadperbit4 = sad_per_bit4lut_10[qindex];
+      x->sadperbit16 = sad_per_bit16lut_10[qindex];
+      x->sadperbit4 = sad_per_bit4lut_10[qindex];
       break;
     case VPX_BITS_12:
-      cpi->td.mb.sadperbit16 = sad_per_bit16lut_12[qindex];
-      cpi->td.mb.sadperbit4 = sad_per_bit4lut_12[qindex];
+      x->sadperbit16 = sad_per_bit16lut_12[qindex];
+      x->sadperbit4 = sad_per_bit4lut_12[qindex];
       break;
     default:
       assert(0 && "bit_depth should be VPX_BITS_8, VPX_BITS_10 or VPX_BITS_12");
   }
 #else
-  cpi->td.mb.sadperbit16 = sad_per_bit16lut_8[qindex];
-  cpi->td.mb.sadperbit4 = sad_per_bit4lut_8[qindex];
+  (void)cpi;
+  x->sadperbit16 = sad_per_bit16lut_8[qindex];
+  x->sadperbit4 = sad_per_bit4lut_8[qindex];
 #endif  // CONFIG_VP9_HIGHBITDEPTH
 }
 

vp9/encoder/vp9_rd.h

@@ -132,7 +132,7 @@ int vp9_compute_rd_mult(const struct VP9_COMP *cpi, int qindex);
 
 void vp9_initialize_rd_consts(struct VP9_COMP *cpi);
 
-void vp9_initialize_me_consts(struct VP9_COMP *cpi, int qindex);
+void vp9_initialize_me_consts(struct VP9_COMP *cpi, MACROBLOCK *x, int qindex);
 
 void vp9_model_rd_from_var_lapndz(unsigned int var, unsigned int n,
                                   unsigned int qstep, int *rate,