diff --git a/configure b/configure
index f94546e7e..c0e898006 100755
--- a/configure
+++ b/configure
@@ -263,9 +263,7 @@ ARCH_EXT_LIST="
 HAVE_LIST="
     ${ARCH_EXT_LIST}
     vpx_ports
-    stdint_h
     pthread_h
-    sys_mman_h
     unistd_h
 "
 EXPERIMENT_LIST="
@@ -559,16 +557,12 @@ process_detect() {
             # Specialize windows and POSIX environments.
             case $toolchain in
                 *-win*-*)
-                    case $header-$toolchain in
-                        stdint*-gcc) true;;
-                        *) false;;
-                    esac && enable_feature $var
-                    ;;
+                    # Don't check for any headers in Windows builds.
+                    false
+                ;;
                 *)
                     case $header in
-                        stdint.h) true;;
                         pthread.h) true;;
-                        sys/mman.h) true;;
                         unistd.h) true;;
                         *) false;;
                     esac && enable_feature $var
@@ -584,9 +578,7 @@ process_detect() {
 int main(void) {return 0;}
 EOF
     # check system headers
-    check_header stdint.h
     check_header pthread.h
-    check_header sys/mman.h
     check_header unistd.h # for sysconf(3) and friends.
 
     check_header vpx/vpx_integer.h -I${source_path} && enable_feature vpx_ports
diff --git a/examples/vp8_multi_resolution_encoder.c b/examples/vp8_multi_resolution_encoder.c
index 2b032049c..0248edede 100644
--- a/examples/vp8_multi_resolution_encoder.c
+++ b/examples/vp8_multi_resolution_encoder.c
@@ -29,13 +29,6 @@
 #include <math.h>
 #include <assert.h>
 #include <sys/time.h>
-#if USE_POSIX_MMAP
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <sys/mman.h>
-#include <fcntl.h>
-#include <unistd.h>
-#endif
 #include "vpx_ports/vpx_timer.h"
 #include "vpx/vpx_encoder.h"
 #include "vpx/vp8cx.h"
diff --git a/vp10/encoder/aq_complexity.c b/vp10/encoder/aq_complexity.c
index 0de044cf9..2506a4e55 100644
--- a/vp10/encoder/aq_complexity.c
+++ b/vp10/encoder/aq_complexity.c
@@ -51,7 +51,7 @@ void vp10_setup_in_frame_q_adj(VP10_COMP *cpi) {
   // Make SURE use of floating point in this function is safe.
   vpx_clear_system_state();
 
-  if (cm->frame_type == KEY_FRAME ||
+  if (frame_is_intra_only(cm) || cm->error_resilient_mode ||
       cpi->refresh_alt_ref_frame ||
       (cpi->refresh_golden_frame && !cpi->rc.is_src_frame_alt_ref)) {
     int segment;
diff --git a/vp10/encoder/aq_variance.c b/vp10/encoder/aq_variance.c
index e8e88c3b6..bed5162fb 100644
--- a/vp10/encoder/aq_variance.c
+++ b/vp10/encoder/aq_variance.c
@@ -47,7 +47,7 @@ void vp10_vaq_frame_setup(VP10_COMP *cpi) {
   struct segmentation *seg = &cm->seg;
   int i;
 
-  if (cm->frame_type == KEY_FRAME ||
+  if (frame_is_intra_only(cm) || cm->error_resilient_mode ||
       cpi->refresh_alt_ref_frame ||
       (cpi->refresh_golden_frame && !cpi->rc.is_src_frame_alt_ref)) {
     vp10_enable_segmentation(seg);
diff --git a/vp10/encoder/segmentation.c b/vp10/encoder/segmentation.c
index e93677573..969b87fa9 100644
--- a/vp10/encoder/segmentation.c
+++ b/vp10/encoder/segmentation.c
@@ -250,7 +250,7 @@ void vp10_choose_segmap_coding_method(VP10_COMMON *cm, MACROBLOCKD *xd) {
   no_pred_cost = cost_segmap(no_pred_segcounts, no_pred_tree);
 
   // Key frames cannot use temporal prediction
-  if (!frame_is_intra_only(cm)) {
+  if (!frame_is_intra_only(cm) && !cm->error_resilient_mode) {
     // Work out probability tree for coding those segments not
     // predicted using the temporal method and the cost.
     calc_segtree_probs(t_unpred_seg_counts, t_pred_tree, segp->tree_probs);
@@ -273,6 +273,7 @@ void vp10_choose_segmap_coding_method(VP10_COMMON *cm, MACROBLOCKD *xd) {
 
   // Now choose which coding method to use.
   if (t_pred_cost < no_pred_cost) {
+    assert(!cm->error_resilient_mode);
     seg->temporal_update = 1;
   } else {
     seg->temporal_update = 0;
diff --git a/vp9/common/vp9_entropymv.c b/vp9/common/vp9_entropymv.c
index 3acfe1448..566ae91cf 100644
--- a/vp9/common/vp9_entropymv.c
+++ b/vp9/common/vp9_entropymv.c
@@ -11,9 +11,6 @@
 #include "vp9/common/vp9_onyxc_int.h"
 #include "vp9/common/vp9_entropymv.h"
 
-// Integer pel reference mv threshold for use of high-precision 1/8 mv
-#define COMPANDED_MVREF_THRESH 8
-
 const vpx_tree_index vp9_mv_joint_tree[TREE_SIZE(MV_JOINTS)] = {
   -MV_JOINT_ZERO, 2,
   -MV_JOINT_HNZVZ, 4,
@@ -127,11 +124,6 @@ MV_CLASS_TYPE vp9_get_mv_class(int z, int *offset) {
   return c;
 }
 
-int vp9_use_mv_hp(const MV *ref) {
-  return (abs(ref->row) >> 3) < COMPANDED_MVREF_THRESH &&
-         (abs(ref->col) >> 3) < COMPANDED_MVREF_THRESH;
-}
-
 static void inc_mv_component(int v, nmv_component_counts *comp_counts,
                              int incr, int usehp) {
   int s, z, c, o, d, e, f;
diff --git a/vp9/common/vp9_entropymv.h b/vp9/common/vp9_entropymv.h
index 8c817bf7b..2f05ad44b 100644
--- a/vp9/common/vp9_entropymv.h
+++ b/vp9/common/vp9_entropymv.h
@@ -27,7 +27,14 @@ struct VP9Common;
 void vp9_init_mv_probs(struct VP9Common *cm);
 
 void vp9_adapt_mv_probs(struct VP9Common *cm, int usehp);
-int vp9_use_mv_hp(const MV *ref);
+
+// Integer pel reference mv threshold for use of high-precision 1/8 mv
+#define COMPANDED_MVREF_THRESH 8
+
+static INLINE int use_mv_hp(const MV *ref) {
+  return (abs(ref->row) >> 3) < COMPANDED_MVREF_THRESH &&
+         (abs(ref->col) >> 3) < COMPANDED_MVREF_THRESH;
+}
 
 #define MV_UPDATE_PROB 252
 
diff --git a/vp9/common/vp9_mvref_common.c b/vp9/common/vp9_mvref_common.c
index 77d1ff459..9803ff627 100644
--- a/vp9/common/vp9_mvref_common.c
+++ b/vp9/common/vp9_mvref_common.c
@@ -11,20 +11,19 @@
 
 #include "vp9/common/vp9_mvref_common.h"
 
-// This function searches the neighbourhood of a given MB/SB
+// This function searches the neighborhood of a given MB/SB
 // to try and find candidate reference vectors.
 static void find_mv_refs_idx(const VP9_COMMON *cm, const MACROBLOCKD *xd,
                              MODE_INFO *mi, MV_REFERENCE_FRAME ref_frame,
                              int_mv *mv_ref_list,
                              int block, int mi_row, int mi_col,
-                             find_mv_refs_sync sync, void *const data,
                              uint8_t *mode_context) {
   const int *ref_sign_bias = cm->ref_frame_sign_bias;
   int i, refmv_count = 0;
   const POSITION *const mv_ref_search = mv_ref_blocks[mi->mbmi.sb_type];
   int different_ref_found = 0;
   int context_counter = 0;
-  const MV_REF *const  prev_frame_mvs = cm->use_prev_frame_mvs ?
+  const MV_REF *const prev_frame_mvs = cm->use_prev_frame_mvs ?
       cm->prev_frame->mvs + mi_row * cm->mi_cols + mi_col : NULL;
   const TileInfo *const tile = &xd->tile;
 
@@ -59,8 +58,8 @@ static void find_mv_refs_idx(const VP9_COMMON *cm, const MACROBLOCKD *xd,
   for (; i < MVREF_NEIGHBOURS; ++i) {
     const POSITION *const mv_ref = &mv_ref_search[i];
     if (is_inside(tile, mi_col, mi_row, cm->mi_rows, mv_ref)) {
-      const MB_MODE_INFO *const candidate = &xd->mi[mv_ref->col + mv_ref->row *
-                                                    xd->mi_stride]->mbmi;
+      const MB_MODE_INFO *const candidate =
+          &xd->mi[mv_ref->col + mv_ref->row * xd->mi_stride]->mbmi;
       different_ref_found = 1;
 
       if (candidate->ref_frame[0] == ref_frame)
@@ -70,23 +69,8 @@ static void find_mv_refs_idx(const VP9_COMMON *cm, const MACROBLOCKD *xd,
     }
   }
 
-  // TODO(hkuang): Remove this sync after fixing pthread_cond_broadcast
-  // on windows platform. The sync here is unncessary if use_perv_frame_mvs
-  // is 0. But after removing it, there will be hang in the unit test on windows
-  // due to several threads waiting for a thread's signal.
-#if defined(_WIN32) && !HAVE_PTHREAD_H
-    if (cm->frame_parallel_decode && sync != NULL) {
-      sync(data, mi_row);
-    }
-#endif
-
   // Check the last frame's mode and mv info.
   if (cm->use_prev_frame_mvs) {
-    // Synchronize here for frame parallel decode if sync function is provided.
-    if (cm->frame_parallel_decode && sync != NULL) {
-      sync(data, mi_row);
-    }
-
     if (prev_frame_mvs->ref_frame[0] == ref_frame) {
       ADD_MV_REF_LIST(prev_frame_mvs->mv[0], refmv_count, mv_ref_list, Done);
     } else if (prev_frame_mvs->ref_frame[1] == ref_frame) {
@@ -101,8 +85,8 @@ static void find_mv_refs_idx(const VP9_COMMON *cm, const MACROBLOCKD *xd,
     for (i = 0; i < MVREF_NEIGHBOURS; ++i) {
       const POSITION *mv_ref = &mv_ref_search[i];
       if (is_inside(tile, mi_col, mi_row, cm->mi_rows, mv_ref)) {
-        const MB_MODE_INFO *const candidate = &xd->mi[mv_ref->col + mv_ref->row
-                                              * xd->mi_stride]->mbmi;
+        const MB_MODE_INFO *const candidate =
+            &xd->mi[mv_ref->col + mv_ref->row * xd->mi_stride]->mbmi;
 
         // If the candidate is INTRA we don't want to consider its mv.
         IF_DIFF_REF_FRAME_ADD_MV(candidate, ref_frame, ref_sign_bias,
@@ -150,20 +134,9 @@ void vp9_find_mv_refs(const VP9_COMMON *cm, const MACROBLOCKD *xd,
                       MODE_INFO *mi, MV_REFERENCE_FRAME ref_frame,
                       int_mv *mv_ref_list,
                       int mi_row, int mi_col,
-                      find_mv_refs_sync sync, void *const data,
                       uint8_t *mode_context) {
   find_mv_refs_idx(cm, xd, mi, ref_frame, mv_ref_list, -1,
-                   mi_row, mi_col, sync, data, mode_context);
-}
-
-static void lower_mv_precision(MV *mv, int allow_hp) {
-  const int use_hp = allow_hp && vp9_use_mv_hp(mv);
-  if (!use_hp) {
-    if (mv->row & 1)
-      mv->row += (mv->row > 0 ? -1 : 1);
-    if (mv->col & 1)
-      mv->col += (mv->col > 0 ? -1 : 1);
-  }
+                   mi_row, mi_col, mode_context);
 }
 
 void vp9_find_best_ref_mvs(MACROBLOCKD *xd, int allow_hp,
@@ -191,7 +164,7 @@ void vp9_append_sub8x8_mvs_for_idx(VP9_COMMON *cm, MACROBLOCKD *xd,
   assert(MAX_MV_REF_CANDIDATES == 2);
 
   find_mv_refs_idx(cm, xd, mi, mi->mbmi.ref_frame[ref], mv_list, block,
-                   mi_row, mi_col, NULL, NULL, mode_context);
+                   mi_row, mi_col, mode_context);
 
   near_mv->as_int = 0;
   switch (block) {
diff --git a/vp9/common/vp9_mvref_common.h b/vp9/common/vp9_mvref_common.h
index bd216d433..a6dddd01a 100644
--- a/vp9/common/vp9_mvref_common.h
+++ b/vp9/common/vp9_mvref_common.h
@@ -157,7 +157,7 @@ static INLINE int_mv scale_mv(const MB_MODE_INFO *mbmi, int ref,
 
 // This macro is used to add a motion vector mv_ref list if it isn't
 // already in the list.  If it's the second motion vector it will also
-// skip all additional processing and jump to done!
+// skip all additional processing and jump to Done!
 #define ADD_MV_REF_LIST(mv, refmv_count, mv_ref_list, Done) \
   do { \
     if (refmv_count) { \
@@ -207,11 +207,20 @@ static INLINE void clamp_mv2(MV *mv, const MACROBLOCKD *xd) {
                xd->mb_to_bottom_edge + RIGHT_BOTTOM_MARGIN);
 }
 
+static INLINE void lower_mv_precision(MV *mv, int allow_hp) {
+  const int use_hp = allow_hp && use_mv_hp(mv);
+  if (!use_hp) {
+    if (mv->row & 1)
+      mv->row += (mv->row > 0 ? -1 : 1);
+    if (mv->col & 1)
+      mv->col += (mv->col > 0 ? -1 : 1);
+  }
+}
+
 typedef void (*find_mv_refs_sync)(void *const data, int mi_row);
 void vp9_find_mv_refs(const VP9_COMMON *cm, const MACROBLOCKD *xd,
                       MODE_INFO *mi, MV_REFERENCE_FRAME ref_frame,
                       int_mv *mv_ref_list, int mi_row, int mi_col,
-                      find_mv_refs_sync sync, void *const data,
                       uint8_t *mode_context);
 
 // check a list of motion vectors by sad score using a number rows of pixels
diff --git a/vp9/decoder/vp9_decodeframe.c b/vp9/decoder/vp9_decodeframe.c
index 3fd87cc3a..e27634cdd 100644
--- a/vp9/decoder/vp9_decodeframe.c
+++ b/vp9/decoder/vp9_decodeframe.c
@@ -719,6 +719,18 @@ static void dec_build_inter_predictors_sb(VP9Decoder *const pbi,
   const InterpKernel *kernel = vp9_filter_kernels[mi->mbmi.interp_filter];
   const BLOCK_SIZE sb_type = mi->mbmi.sb_type;
   const int is_compound = has_second_ref(&mi->mbmi);
+  int ref;
+
+  for (ref = 0; ref < 1 + is_compound; ++ref) {
+    const MV_REFERENCE_FRAME frame = mi->mbmi.ref_frame[ref];
+    RefBuffer *ref_buf = &pbi->common.frame_refs[frame - LAST_FRAME];
+
+    xd->block_refs[ref] = ref_buf;
+    if (!vp9_is_valid_scale(&ref_buf->sf))
+      vpx_internal_error(xd->error_info, VPX_CODEC_UNSUP_BITSTREAM,
+                         "Reference frame has invalid dimensions");
+    vp9_setup_pre_planes(xd, ref, ref_buf->buf, mi_row, mi_col, &ref_buf->sf);
+  }
 
   for (plane = 0; plane < MAX_MB_PLANE; ++plane) {
     struct macroblockd_plane *const pd = &xd->plane[plane];
diff --git a/vp9/decoder/vp9_decodemv.c b/vp9/decoder/vp9_decodemv.c
index d3ca7b3fe..bf5d81d86 100644
--- a/vp9/decoder/vp9_decodemv.c
+++ b/vp9/decoder/vp9_decodemv.c
@@ -289,7 +289,7 @@ static INLINE void read_mv(vpx_reader *r, MV *mv, const MV *ref,
                            nmv_context_counts *counts, int allow_hp) {
   const MV_JOINT_TYPE joint_type =
       (MV_JOINT_TYPE)vpx_read_tree(r, vp9_mv_joint_tree, ctx->joints);
-  const int use_hp = allow_hp && vp9_use_mv_hp(ref);
+  const int use_hp = allow_hp && use_mv_hp(ref);
   MV diff = {0, 0};
 
   if (mv_joint_vertical(joint_type))
@@ -476,12 +476,203 @@ static int read_is_inter_block(VP9_COMMON *const cm, MACROBLOCKD *const xd,
   }
 }
 
+static void dec_find_best_ref_mvs(MACROBLOCKD *xd, int allow_hp, int_mv *mvlist,
+                                  int_mv *nearest_mv, int_mv *near_mv,
+                                  int refmv_count) {
+  int i;
+
+  // Make sure all the candidates are properly clamped etc
+  for (i = 0; i < refmv_count; ++i) {
+    lower_mv_precision(&mvlist[i].as_mv, allow_hp);
+    clamp_mv2(&mvlist[i].as_mv, xd);
+  }
+  *nearest_mv = mvlist[0];
+  *near_mv = mvlist[1];
+}
+
 static void fpm_sync(void *const data, int mi_row) {
   VP9Decoder *const pbi = (VP9Decoder *)data;
   vp9_frameworker_wait(pbi->frame_worker_owner, pbi->common.prev_frame,
                        mi_row << MI_BLOCK_SIZE_LOG2);
 }
 
+// This macro is used to add a motion vector mv_ref list if it isn't
+// already in the list.  If it's the second motion vector or early_break
+// it will also skip all additional processing and jump to Done!
+#define ADD_MV_REF_LIST_EB(mv, refmv_count, mv_ref_list, Done) \
+  do { \
+    if (refmv_count) { \
+      if ((mv).as_int != (mv_ref_list)[0].as_int) { \
+        (mv_ref_list)[(refmv_count)] = (mv); \
+        refmv_count++; \
+        goto Done; \
+      } \
+    } else { \
+      (mv_ref_list)[(refmv_count)++] = (mv); \
+      if (early_break) \
+        goto Done; \
+    } \
+  } while (0)
+
+// If either reference frame is different, not INTRA, and they
+// are different from each other scale and add the mv to our list.
+#define IF_DIFF_REF_FRAME_ADD_MV_EB(mbmi, ref_frame, ref_sign_bias, \
+                                    refmv_count, mv_ref_list, Done) \
+  do { \
+    if (is_inter_block(mbmi)) { \
+      if ((mbmi)->ref_frame[0] != ref_frame) \
+        ADD_MV_REF_LIST_EB(scale_mv((mbmi), 0, ref_frame, ref_sign_bias), \
+                           refmv_count, mv_ref_list, Done); \
+      if (has_second_ref(mbmi) && \
+          (mbmi)->ref_frame[1] != ref_frame && \
+          (mbmi)->mv[1].as_int != (mbmi)->mv[0].as_int) \
+        ADD_MV_REF_LIST_EB(scale_mv((mbmi), 1, ref_frame, ref_sign_bias), \
+                           refmv_count, mv_ref_list, Done); \
+    } \
+  } while (0)
+
+// This function searches the neighborhood of a given MB/SB
+// to try and find candidate reference vectors.
+static int dec_find_mv_refs(const VP9_COMMON *cm, const MACROBLOCKD *xd,
+                            MODE_INFO *mi, MV_REFERENCE_FRAME ref_frame,
+                            const POSITION *const mv_ref_search,
+                            int_mv *mv_ref_list,
+                            int mi_row, int mi_col,
+                            find_mv_refs_sync sync, void *const data) {
+  const int *ref_sign_bias = cm->ref_frame_sign_bias;
+  int i, refmv_count = 0;
+  int different_ref_found = 0;
+  const MV_REF *const prev_frame_mvs = cm->use_prev_frame_mvs ?
+      cm->prev_frame->mvs + mi_row * cm->mi_cols + mi_col : NULL;
+  const TileInfo *const tile = &xd->tile;
+  // If mode is nearestmv or newmv (uses nearestmv as a reference) then stop
+  // searching after the first mv is found.
+  const int early_break = (mi->mbmi.mode == NEARESTMV) ||
+                          (mi->mbmi.mode == NEWMV);
+
+  // Blank the reference vector list
+  memset(mv_ref_list, 0, sizeof(*mv_ref_list) * MAX_MV_REF_CANDIDATES);
+
+  // Check the rest of the neighbors in much the same way
+  // as before except we don't need to keep track of sub blocks or
+  // mode counts.
+  for (i = 0; i < MVREF_NEIGHBOURS; ++i) {
+    const POSITION *const mv_ref = &mv_ref_search[i];
+    if (is_inside(tile, mi_col, mi_row, cm->mi_rows, mv_ref)) {
+      const MB_MODE_INFO *const candidate =
+          &xd->mi[mv_ref->col + mv_ref->row * xd->mi_stride]->mbmi;
+      different_ref_found = 1;
+
+      if (candidate->ref_frame[0] == ref_frame)
+        ADD_MV_REF_LIST_EB(candidate->mv[0], refmv_count, mv_ref_list, Done);
+      else if (candidate->ref_frame[1] == ref_frame)
+        ADD_MV_REF_LIST_EB(candidate->mv[1], refmv_count, mv_ref_list, Done);
+    }
+  }
+
+  // TODO(hkuang): Remove this sync after fixing pthread_cond_broadcast
+  // on windows platform. The sync here is unnecessary if use_prev_frame_mvs
+  // is 0. But after removing it, there will be hang in the unit test on windows
+  // due to several threads waiting for a thread's signal.
+#if defined(_WIN32) && !HAVE_PTHREAD_H
+    if (cm->frame_parallel_decode && sync != NULL) {
+      sync(data, mi_row);
+    }
+#endif
+
+  // Check the last frame's mode and mv info.
+  if (prev_frame_mvs) {
+    // Synchronize here for frame parallel decode if sync function is provided.
+    if (cm->frame_parallel_decode && sync != NULL) {
+      sync(data, mi_row);
+    }
+
+    if (prev_frame_mvs->ref_frame[0] == ref_frame) {
+      ADD_MV_REF_LIST_EB(prev_frame_mvs->mv[0], refmv_count, mv_ref_list, Done);
+    } else if (prev_frame_mvs->ref_frame[1] == ref_frame) {
+      ADD_MV_REF_LIST_EB(prev_frame_mvs->mv[1], refmv_count, mv_ref_list, Done);
+    }
+  }
+
+  // Since we couldn't find 2 mvs from the same reference frame
+  // go back through the neighbors and find motion vectors from
+  // different reference frames.
+  if (different_ref_found) {
+    for (i = 0; i < MVREF_NEIGHBOURS; ++i) {
+      const POSITION *mv_ref = &mv_ref_search[i];
+      if (is_inside(tile, mi_col, mi_row, cm->mi_rows, mv_ref)) {
+        const MB_MODE_INFO *const candidate =
+            &xd->mi[mv_ref->col + mv_ref->row * xd->mi_stride]->mbmi;
+
+        // If the candidate is INTRA we don't want to consider its mv.
+        IF_DIFF_REF_FRAME_ADD_MV_EB(candidate, ref_frame, ref_sign_bias,
+                                    refmv_count, mv_ref_list, Done);
+      }
+    }
+  }
+
+  // Since we still don't have a candidate we'll try the last frame.
+  if (prev_frame_mvs) {
+    if (prev_frame_mvs->ref_frame[0] != ref_frame &&
+        prev_frame_mvs->ref_frame[0] > INTRA_FRAME) {
+      int_mv mv = prev_frame_mvs->mv[0];
+      if (ref_sign_bias[prev_frame_mvs->ref_frame[0]] !=
+          ref_sign_bias[ref_frame]) {
+        mv.as_mv.row *= -1;
+        mv.as_mv.col *= -1;
+      }
+      ADD_MV_REF_LIST_EB(mv, refmv_count, mv_ref_list, Done);
+    }
+
+    if (prev_frame_mvs->ref_frame[1] > INTRA_FRAME &&
+        prev_frame_mvs->ref_frame[1] != ref_frame &&
+        prev_frame_mvs->mv[1].as_int != prev_frame_mvs->mv[0].as_int) {
+      int_mv mv = prev_frame_mvs->mv[1];
+      if (ref_sign_bias[prev_frame_mvs->ref_frame[1]] !=
+          ref_sign_bias[ref_frame]) {
+        mv.as_mv.row *= -1;
+        mv.as_mv.col *= -1;
+      }
+      ADD_MV_REF_LIST_EB(mv, refmv_count, mv_ref_list, Done);
+    }
+  }
+
+  if (mi->mbmi.mode == NEARMV)
+    refmv_count = MAX_MV_REF_CANDIDATES;
+  else
+    // we only care about the nearestmv for the remaining modes
+    refmv_count = 1;
+
+ Done:
+  // Clamp vectors
+  for (i = 0; i < refmv_count; ++i)
+    clamp_mv_ref(&mv_ref_list[i].as_mv, xd);
+
+  return refmv_count;
+}
+
+static uint8_t get_mode_context(const VP9_COMMON *cm, const MACROBLOCKD *xd,
+                                const POSITION *const mv_ref_search,
+                                int mi_row, int mi_col) {
+  int i;
+  int context_counter = 0;
+  const TileInfo *const tile = &xd->tile;
+
+  // Get mode count from nearest 2 blocks
+  for (i = 0; i < 2; ++i) {
+    const POSITION *const mv_ref = &mv_ref_search[i];
+    if (is_inside(tile, mi_col, mi_row, cm->mi_rows, mv_ref)) {
+      const MODE_INFO *const candidate_mi = xd->mi[mv_ref->col + mv_ref->row *
+                                                   xd->mi_stride];
+      const MB_MODE_INFO *const candidate = &candidate_mi->mbmi;
+      // Keep counts for entropy encoding.
+      context_counter += mode_2_counter[candidate->mode];
+    }
+  }
+
+  return counter_to_context[context_counter];
+}
+
 static void read_inter_block_mode_info(VP9Decoder *const pbi,
                                        MACROBLOCKD *const xd,
                                        MODE_INFO *const mi,
@@ -491,26 +682,13 @@ static void read_inter_block_mode_info(VP9Decoder *const pbi,
   const BLOCK_SIZE bsize = mbmi->sb_type;
   const int allow_hp = cm->allow_high_precision_mv;
   int_mv nearestmv[2], nearmv[2];
-  int_mv ref_mvs[MAX_REF_FRAMES][MAX_MV_REF_CANDIDATES];
   int ref, is_compound;
-  uint8_t inter_mode_ctx[MAX_REF_FRAMES];
+  uint8_t inter_mode_ctx;
+  const POSITION *const mv_ref_search = mv_ref_blocks[bsize];
 
   read_ref_frames(cm, xd, r, mbmi->segment_id, mbmi->ref_frame);
   is_compound = has_second_ref(mbmi);
-
-  for (ref = 0; ref < 1 + is_compound; ++ref) {
-    const MV_REFERENCE_FRAME frame = mbmi->ref_frame[ref];
-    RefBuffer *ref_buf = &cm->frame_refs[frame - LAST_FRAME];
-
-    xd->block_refs[ref] = ref_buf;
-    if ((!vp9_is_valid_scale(&ref_buf->sf)))
-      vpx_internal_error(xd->error_info, VPX_CODEC_UNSUP_BITSTREAM,
-                         "Reference frame has invalid dimensions");
-    vp9_setup_pre_planes(xd, ref, ref_buf->buf, mi_row, mi_col,
-                         &ref_buf->sf);
-    vp9_find_mv_refs(cm, xd, mi, frame, ref_mvs[frame],
-                     mi_row, mi_col, fpm_sync, (void *)pbi, inter_mode_ctx);
-  }
+  inter_mode_ctx = get_mode_context(cm, xd, mv_ref_search, mi_row, mi_col);
 
   if (segfeature_active(&cm->seg, mbmi->segment_id, SEG_LVL_SKIP)) {
     mbmi->mode = ZEROMV;
@@ -521,14 +699,27 @@ static void read_inter_block_mode_info(VP9Decoder *const pbi,
     }
   } else {
     if (bsize >= BLOCK_8X8)
-      mbmi->mode = read_inter_mode(cm, xd, r,
-                                   inter_mode_ctx[mbmi->ref_frame[0]]);
-  }
+      mbmi->mode = read_inter_mode(cm, xd, r, inter_mode_ctx);
+    else
+      // Sub 8x8 blocks use the nearestmv as a ref_mv if the b_mode is NEWMV.
+      // Setting mode to NEARESTMV forces the search to stop after the nearestmv
+      // has been found. After b_modes have been read, mode will be overwritten
+      // by the last b_mode.
+      mbmi->mode = NEARESTMV;
 
-  if (bsize < BLOCK_8X8 || mbmi->mode != ZEROMV) {
-    for (ref = 0; ref < 1 + is_compound; ++ref) {
-      vp9_find_best_ref_mvs(xd, allow_hp, ref_mvs[mbmi->ref_frame[ref]],
-                            &nearestmv[ref], &nearmv[ref]);
+    if (mbmi->mode != ZEROMV) {
+      for (ref = 0; ref < 1 + is_compound; ++ref) {
+        int_mv ref_mvs[MAX_MV_REF_CANDIDATES];
+        const MV_REFERENCE_FRAME frame = mbmi->ref_frame[ref];
+        int refmv_count;
+
+        refmv_count = dec_find_mv_refs(cm, xd, mi, frame, mv_ref_search,
+                                       ref_mvs, mi_row, mi_col, fpm_sync,
+                                       (void *)pbi);
+
+        dec_find_best_ref_mvs(xd, allow_hp, ref_mvs, &nearestmv[ref],
+                              &nearmv[ref], refmv_count);
+      }
     }
   }
 
@@ -546,7 +737,7 @@ static void read_inter_block_mode_info(VP9Decoder *const pbi,
       for (idx = 0; idx < 2; idx += num_4x4_w) {
         int_mv block[2];
         const int j = idy * 2 + idx;
-        b_mode = read_inter_mode(cm, xd, r, inter_mode_ctx[mbmi->ref_frame[0]]);
+        b_mode = read_inter_mode(cm, xd, r, inter_mode_ctx);
 
         if (b_mode == NEARESTMV || b_mode == NEARMV) {
           uint8_t dummy_mode_ctx[MAX_REF_FRAMES];
diff --git a/vp9/encoder/vp9_aq_360.c b/vp9/encoder/vp9_aq_360.c
new file mode 100644
index 000000000..7f937344d
--- /dev/null
+++ b/vp9/encoder/vp9_aq_360.c
@@ -0,0 +1,79 @@
+/*
+ *  Copyright (c) 2013 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 <math.h>
+
+#include "vpx_ports/mem.h"
+#include "vpx_ports/system_state.h"
+
+#include "vp9/encoder/vp9_aq_variance.h"
+
+#include "vp9/common/vp9_seg_common.h"
+
+#include "vp9/encoder/vp9_ratectrl.h"
+#include "vp9/encoder/vp9_rd.h"
+#include "vp9/encoder/vp9_segmentation.h"
+
+#define ENERGY_MIN (-4)
+#define ENERGY_MAX (1)
+#define ENERGY_SPAN (ENERGY_MAX - ENERGY_MIN +  1)
+#define ENERGY_IN_BOUNDS(energy)\
+  assert((energy) >= ENERGY_MIN && (energy) <= ENERGY_MAX)
+
+static const double rate_ratio[MAX_SEGMENTS] =
+  {1.0, 0.75, 0.6, 0.5, 0.4, 0.3, 0.25};
+
+// Sets segment id 0 for the equatorial region, 1 for temperate region
+// and 2 for the polar regions
+unsigned int vp9_360aq_segment_id(int mi_row, int mi_rows) {
+  if (mi_row < mi_rows / 8 || mi_row > mi_rows - mi_rows / 8)
+    return 2;
+  else if (mi_row < mi_rows / 4 || mi_row > mi_rows - mi_rows / 4)
+    return 1;
+  else
+    return 0;
+}
+
+void vp9_360aq_frame_setup(VP9_COMP *cpi) {
+  VP9_COMMON *cm = &cpi->common;
+  struct segmentation *seg = &cm->seg;
+  int i;
+
+  if (frame_is_intra_only(cm) || cm->error_resilient_mode) {
+    vp9_enable_segmentation(seg);
+    vp9_clearall_segfeatures(seg);
+
+    seg->abs_delta = SEGMENT_DELTADATA;
+
+    vpx_clear_system_state();
+
+    for (i = 0; i < MAX_SEGMENTS; ++i) {
+      int qindex_delta =
+          vp9_compute_qdelta_by_rate(&cpi->rc, cm->frame_type, cm->base_qindex,
+                                     rate_ratio[i], cm->bit_depth);
+
+      // We don't allow qindex 0 in a segment if the base value is not 0.
+      // Q index 0 (lossless) implies 4x4 encoding only and in AQ mode a segment
+      // Q delta is sometimes applied without going back around the rd loop.
+      // This could lead to an illegal combination of partition size and q.
+      if ((cm->base_qindex != 0) && ((cm->base_qindex + qindex_delta) == 0)) {
+        qindex_delta = -cm->base_qindex + 1;
+      }
+
+      // No need to enable SEG_LVL_ALT_Q for this segment.
+      if (rate_ratio[i] == 1.0) {
+        continue;
+      }
+
+      vp9_set_segdata(seg, i, SEG_LVL_ALT_Q, qindex_delta);
+      vp9_enable_segfeature(seg, i, SEG_LVL_ALT_Q);
+    }
+  }
+}
diff --git a/vp9/encoder/vp9_aq_360.h b/vp9/encoder/vp9_aq_360.h
new file mode 100644
index 000000000..fb861cb05
--- /dev/null
+++ b/vp9/encoder/vp9_aq_360.h
@@ -0,0 +1,28 @@
+/*
+ *  Copyright (c) 2013 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.
+ */
+
+
+#ifndef VP9_ENCODER_VP9_AQ_360_H_
+#define VP9_ENCODER_VP9_AQ_360_H_
+
+#include "vp9/encoder/vp9_encoder.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+unsigned int vp9_360aq_segment_id(int mi_row, int mi_rows);
+void vp9_360aq_frame_setup(VP9_COMP *cpi);
+
+#ifdef __cplusplus
+}  // extern "C"
+#endif
+
+#endif  // VP9_ENCODER_VP9_AQ_VARIANCE_H_
diff --git a/vp9/encoder/vp9_encodeframe.c b/vp9/encoder/vp9_encodeframe.c
index 7f94e1944..27423f764 100644
--- a/vp9/encoder/vp9_encodeframe.c
+++ b/vp9/encoder/vp9_encodeframe.c
@@ -33,6 +33,7 @@
 #include "vp9/common/vp9_seg_common.h"
 #include "vp9/common/vp9_tile_common.h"
 
+#include "vp9/encoder/vp9_aq_360.h"
 #include "vp9/encoder/vp9_aq_complexity.h"
 #include "vp9/encoder/vp9_aq_cyclicrefresh.h"
 #include "vp9/encoder/vp9_aq_variance.h"
@@ -221,7 +222,8 @@ static void set_offsets(VP9_COMP *cpi, const TileInfo *const tile,
 
   // Setup segment ID.
   if (seg->enabled) {
-    if (cpi->oxcf.aq_mode != VARIANCE_AQ) {
+    if (cpi->oxcf.aq_mode != VARIANCE_AQ &&
+        cpi->oxcf.aq_mode != EQUATOR360_AQ) {
       const uint8_t *const map = seg->update_map ? cpi->segmentation_map
                                                  : cm->last_frame_seg_map;
       mbmi->segment_id = get_segment_id(cm, map, bsize, mi_row, mi_col);
@@ -1263,6 +1265,15 @@ static void rd_pick_sb_modes(VP9_COMP *cpi,
       mbmi->segment_id = get_segment_id(cm, map, bsize, mi_row, mi_col);
     }
     x->rdmult = set_segment_rdmult(cpi, x, mbmi->segment_id);
+  } else if (aq_mode == EQUATOR360_AQ) {
+    if (cm->frame_type == KEY_FRAME) {
+      mbmi->segment_id = vp9_360aq_segment_id(mi_row, cm->mi_rows);
+    } else {
+      const uint8_t *const map = cm->seg.update_map ? cpi->segmentation_map
+                                                    : cm->last_frame_seg_map;
+      mbmi->segment_id = get_segment_id(cm, map, bsize, mi_row, mi_col);
+    }
+    x->rdmult = set_segment_rdmult(cpi, x, mbmi->segment_id);
   } else if (aq_mode == COMPLEXITY_AQ) {
     x->rdmult = set_segment_rdmult(cpi, x, mbmi->segment_id);
   } else if (aq_mode == CYCLIC_REFRESH_AQ) {
@@ -1719,7 +1730,8 @@ static void update_state_rt(VP9_COMP *cpi, ThreadData *td,
     // For in frame complexity AQ or variance AQ, copy segment_id from
     // segmentation_map.
     if (cpi->oxcf.aq_mode == COMPLEXITY_AQ ||
-        cpi->oxcf.aq_mode == VARIANCE_AQ ) {
+        cpi->oxcf.aq_mode == VARIANCE_AQ ||
+        cpi->oxcf.aq_mode == EQUATOR360_AQ) {
       const uint8_t *const map = seg->update_map ? cpi->segmentation_map
                                                  : cm->last_frame_seg_map;
       mbmi->segment_id = get_segment_id(cm, map, bsize, mi_row, mi_col);
diff --git a/vp9/encoder/vp9_encodemv.c b/vp9/encoder/vp9_encodemv.c
index e71966343..3bcd6a3b6 100644
--- a/vp9/encoder/vp9_encodemv.c
+++ b/vp9/encoder/vp9_encodemv.c
@@ -206,7 +206,7 @@ void vp9_encode_mv(VP9_COMP* cpi, vpx_writer* w,
   const MV diff = {mv->row - ref->row,
                    mv->col - ref->col};
   const MV_JOINT_TYPE j = vp9_get_mv_joint(&diff);
-  usehp = usehp && vp9_use_mv_hp(ref);
+  usehp = usehp && use_mv_hp(ref);
 
   vp9_write_token(w, vp9_mv_joint_tree, mvctx->joints, &mv_joint_encodings[j]);
   if (mv_joint_vertical(j))
diff --git a/vp9/encoder/vp9_encoder.c b/vp9/encoder/vp9_encoder.c
index e4681f601..609344dcd 100644
--- a/vp9/encoder/vp9_encoder.c
+++ b/vp9/encoder/vp9_encoder.c
@@ -36,6 +36,7 @@
 #include "vp9/common/vp9_reconintra.h"
 #include "vp9/common/vp9_tile_common.h"
 
+#include "vp9/encoder/vp9_aq_360.h"
 #include "vp9/encoder/vp9_aq_complexity.h"
 #include "vp9/encoder/vp9_aq_cyclicrefresh.h"
 #include "vp9/encoder/vp9_aq_variance.h"
@@ -3334,6 +3335,8 @@ static void encode_without_recode_loop(VP9_COMP *cpi,
   // exclusive.
   if (cpi->oxcf.aq_mode == VARIANCE_AQ) {
     vp9_vaq_frame_setup(cpi);
+  } else if (cpi->oxcf.aq_mode == EQUATOR360_AQ) {
+    vp9_360aq_frame_setup(cpi);
   } else if (cpi->oxcf.aq_mode == COMPLEXITY_AQ) {
     vp9_setup_in_frame_q_adj(cpi);
   } else if (cpi->oxcf.aq_mode == CYCLIC_REFRESH_AQ) {
@@ -3464,6 +3467,8 @@ static void encode_with_recode_loop(VP9_COMP *cpi,
     // exclusive.
     if (cpi->oxcf.aq_mode == VARIANCE_AQ) {
       vp9_vaq_frame_setup(cpi);
+    } else if (cpi->oxcf.aq_mode == EQUATOR360_AQ) {
+      vp9_360aq_frame_setup(cpi);
     } else if (cpi->oxcf.aq_mode == COMPLEXITY_AQ) {
       vp9_setup_in_frame_q_adj(cpi);
     }
diff --git a/vp9/encoder/vp9_encoder.h b/vp9/encoder/vp9_encoder.h
index f6d8931fe..76c36f4e5 100644
--- a/vp9/encoder/vp9_encoder.h
+++ b/vp9/encoder/vp9_encoder.h
@@ -112,6 +112,7 @@ typedef enum {
   VARIANCE_AQ = 1,
   COMPLEXITY_AQ = 2,
   CYCLIC_REFRESH_AQ = 3,
+  EQUATOR360_AQ = 4,
   AQ_MODE_COUNT  // This should always be the last member of the enum
 } AQ_MODE;
 
diff --git a/vp9/encoder/vp9_mcomp.c b/vp9/encoder/vp9_mcomp.c
index a84202bb4..eab07bccb 100644
--- a/vp9/encoder/vp9_mcomp.c
+++ b/vp9/encoder/vp9_mcomp.c
@@ -439,7 +439,7 @@ int vp9_find_best_sub_pixel_tree_pruned_evenmore(
   tr = br;
   tc = bc;
 
-  if (allow_hp && vp9_use_mv_hp(ref_mv) && forced_stop == 0) {
+  if (allow_hp && use_mv_hp(ref_mv) && forced_stop == 0) {
     hstep >>= 1;
     FIRST_LEVEL_CHECKS;
     if (eighthiters > 1) {
@@ -507,7 +507,7 @@ int vp9_find_best_sub_pixel_tree_pruned_more(const MACROBLOCK *x,
     }
   }
 
-  if (allow_hp && vp9_use_mv_hp(ref_mv) && forced_stop == 0) {
+  if (allow_hp && use_mv_hp(ref_mv) && forced_stop == 0) {
     tr = br;
     tc = bc;
     hstep >>= 1;
@@ -602,7 +602,7 @@ int vp9_find_best_sub_pixel_tree_pruned(const MACROBLOCK *x,
     tc = bc;
   }
 
-  if (allow_hp && vp9_use_mv_hp(ref_mv) && forced_stop == 0) {
+  if (allow_hp && use_mv_hp(ref_mv) && forced_stop == 0) {
     hstep >>= 1;
     FIRST_LEVEL_CHECKS;
     if (eighthiters > 1) {
@@ -674,7 +674,7 @@ int vp9_find_best_sub_pixel_tree(const MACROBLOCK *x,
   unsigned int cost_array[5];
   int kr, kc;
 
-  if (!(allow_hp && vp9_use_mv_hp(ref_mv)))
+  if (!(allow_hp && use_mv_hp(ref_mv)))
     if (round == 3)
       round = 2;
 
diff --git a/vp9/encoder/vp9_pickmode.c b/vp9/encoder/vp9_pickmode.c
index 71b8bdba0..4880ff680 100644
--- a/vp9/encoder/vp9_pickmode.c
+++ b/vp9/encoder/vp9_pickmode.c
@@ -1225,8 +1225,7 @@ void vp9_pick_inter_mode(VP9_COMP *cpi, MACROBLOCK *x,
 
       if (cm->use_prev_frame_mvs)
         vp9_find_mv_refs(cm, xd, xd->mi[0], ref_frame,
-                         candidates, mi_row, mi_col, NULL, NULL,
-                         x->mbmi_ext->mode_context);
+                         candidates, mi_row, mi_col, x->mbmi_ext->mode_context);
       else
         const_motion[ref_frame] = mv_refs_rt(cm, x, xd, tile_info,
                                              xd->mi[0],
@@ -1833,8 +1832,7 @@ void vp9_pick_inter_mode_sub8x8(VP9_COMP *cpi, MACROBLOCK *x,
       vp9_setup_pred_block(xd, yv12_mb[ref_frame], yv12, mi_row, mi_col,
                            sf, sf);
       vp9_find_mv_refs(cm, xd, xd->mi[0], ref_frame,
-                       candidates, mi_row, mi_col, NULL, NULL,
-                       mbmi_ext->mode_context);
+                       candidates, mi_row, mi_col, mbmi_ext->mode_context);
 
       vp9_find_best_ref_mvs(xd, cm->allow_high_precision_mv, candidates,
                             &dummy_mv[0], &dummy_mv[1]);
diff --git a/vp9/encoder/vp9_rdopt.c b/vp9/encoder/vp9_rdopt.c
index 973d8f51e..71ee5ee75 100644
--- a/vp9/encoder/vp9_rdopt.c
+++ b/vp9/encoder/vp9_rdopt.c
@@ -2202,7 +2202,7 @@ static void setup_buffer_inter(VP9_COMP *cpi, MACROBLOCK *x,
 
   // Gets an initial list of candidate vectors from neighbours and orders them
   vp9_find_mv_refs(cm, xd, mi, ref_frame, candidates, mi_row, mi_col,
-                   NULL, NULL, mbmi_ext->mode_context);
+                   mbmi_ext->mode_context);
 
   // Candidate refinement carried out at encoder and decoder
   vp9_find_best_ref_mvs(xd, cm->allow_high_precision_mv, candidates,
diff --git a/vp9/vp9cx.mk b/vp9/vp9cx.mk
index de688bf48..c7a334d86 100644
--- a/vp9/vp9cx.mk
+++ b/vp9/vp9cx.mk
@@ -75,6 +75,8 @@ VP9_CX_SRCS-yes += encoder/vp9_tokenize.c
 VP9_CX_SRCS-yes += encoder/vp9_treewriter.c
 VP9_CX_SRCS-yes += encoder/vp9_aq_variance.c
 VP9_CX_SRCS-yes += encoder/vp9_aq_variance.h
+VP9_CX_SRCS-yes += encoder/vp9_aq_360.c
+VP9_CX_SRCS-yes += encoder/vp9_aq_360.h
 VP9_CX_SRCS-yes += encoder/vp9_aq_cyclicrefresh.c
 VP9_CX_SRCS-yes += encoder/vp9_aq_cyclicrefresh.h
 VP9_CX_SRCS-yes += encoder/vp9_aq_complexity.c
diff --git a/vpxenc.c b/vpxenc.c
index afbaeac31..db8fcafa1 100644
--- a/vpxenc.c
+++ b/vpxenc.c
@@ -388,7 +388,7 @@ static const arg_def_t frame_parallel_decoding = ARG_DEF(
 static const arg_def_t aq_mode = ARG_DEF(
     NULL, "aq-mode", 1,
     "Adaptive quantization mode (0: off (default), 1: variance 2: complexity, "
-    "3: cyclic refresh)");
+    "3: cyclic refresh, 4: equator360)");
 static const arg_def_t frame_periodic_boost = ARG_DEF(
     NULL, "frame-boost", 1,
     "Enable frame periodic boost (0: off (default), 1: on)");
diff --git a/vpxstats.c b/vpxstats.c
index 172d8937c..16728ce09 100644
--- a/vpxstats.c
+++ b/vpxstats.c
@@ -26,17 +26,6 @@ int stats_open_file(stats_io_t *stats, const char *fpf, int pass) {
     stats->buf.buf = NULL;
     res = (stats->file != NULL);
   } else {
-#if USE_POSIX_MMAP
-    struct stat stat_buf;
-    int fd;
-
-    fd = open(fpf, O_RDONLY);
-    stats->file = fdopen(fd, "rb");
-    fstat(fd, &stat_buf);
-    stats->buf.sz = stat_buf.st_size;
-    stats->buf.buf = mmap(NULL, stats->buf.sz, PROT_READ, MAP_PRIVATE, fd, 0);
-    res = (stats->buf.buf != NULL);
-#else
     size_t nbytes;
 
     stats->file = fopen(fpf, "rb");
@@ -58,7 +47,6 @@ int stats_open_file(stats_io_t *stats, const char *fpf, int pass) {
 
     nbytes = fread(stats->buf.buf, 1, stats->buf.sz, stats->file);
     res = (nbytes == stats->buf.sz);
-#endif  /* USE_POSIX_MMAP */
   }
 
   return res;
@@ -82,11 +70,7 @@ int stats_open_mem(stats_io_t *stats, int pass) {
 void stats_close(stats_io_t *stats, int last_pass) {
   if (stats->file) {
     if (stats->pass == last_pass) {
-#if USE_POSIX_MMAP
-      munmap(stats->buf.buf, stats->buf.sz);
-#else
       free(stats->buf.buf);
-#endif  /* USE_POSIX_MMAP */
     }
 
     fclose(stats->file);