Update joint_cdf table once per frame.

Move computing the joint_cdf table per coded mv joint symbol to
 computing it only when the probabilities are updated.

Change-Id: If5d195f70e6fad7b60f69606c8386ad5e69657d2

av1/common/entropymv.c

@@ -42,7 +42,10 @@ const aom_tree_index av1_mv_fp_tree[TREE_SIZE(MV_FP_SIZE)] = { -0, 2,  -1,
                                                                4,  -2, -3 };
 
 static const nmv_context default_nmv_context = {
-  { 32, 64, 96 },
+  { 32, 64, 96 },  // joints
+#if CONFIG_DAALA_EC
+  { 0, 0, 0, 0 },  // joint_cdf is computed from joints in av1_init_mv_probs()
+#endif
   { {
         // Vertical component
         128,                                                   // sign
@@ -262,6 +265,10 @@ void av1_init_mv_probs(AV1_COMMON *cm) {
   for (i = 0; i < NMV_CONTEXTS; ++i) cm->fc->nmvc[i] = default_nmv_context;
 #else
   cm->fc->nmvc = default_nmv_context;
+#if CONFIG_DAALA_EC
+  av1_tree_to_cdf(av1_mv_joint_tree, cm->fc->nmvc.joints,
+                  cm->fc->nmvc.joint_cdf);
+#endif
 #endif
 #if CONFIG_GLOBAL_MOTION
   av1_copy(cm->fc->global_motion_types_prob, default_global_motion_types_prob);

av1/common/entropymv.h

@@ -95,6 +95,9 @@ typedef struct {
 
 typedef struct {
   aom_prob joints[MV_JOINTS - 1];
+#if CONFIG_DAALA_EC
+  aom_cdf_prob joint_cdf[MV_JOINTS];
+#endif
   nmv_component comps[2];
 } nmv_context;
 

av1/decoder/decodeframe.c

@@ -209,6 +209,9 @@ static void read_mv_probs(nmv_context *ctx, int allow_hp, aom_reader *r) {
   int i, j;
 
   update_mv_probs(ctx->joints, MV_JOINTS - 1, r);
+#if CONFIG_DAALA_EC
+  av1_tree_to_cdf(av1_mv_joint_tree, ctx->joints, ctx->joint_cdf);
+#endif
 
   for (i = 0; i < 2; ++i) {
     nmv_component *const comp_ctx = &ctx->comps[i];

av1/decoder/decodemv.c

@@ -820,7 +820,11 @@ static INLINE void read_mv(aom_reader *r, MV *mv, const MV *ref,
   const int use_hp = allow_hp && av1_use_mv_hp(ref);
   MV diff = { 0, 0 };
   joint_type =
+#if CONFIG_DAALA_EC
+      (MV_JOINT_TYPE)aom_read_symbol(r, ctx->joint_cdf, MV_JOINTS, ACCT_STR);
+#else
       (MV_JOINT_TYPE)aom_read_tree(r, av1_mv_joint_tree, ctx->joints, ACCT_STR);
+#endif
 
   if (mv_joint_vertical(joint_type))
     diff.row = read_mv_component(r, &ctx->comps[0], use_hp);

av1/encoder/bitstream.c

@@ -3789,6 +3789,10 @@ static uint32_t write_compressed_header(AV1_COMP *cpi, uint8_t *data) {
                         counts->mv);
 #else
                         &counts->mv);
+#endif
+#if CONFIG_DAALA_EC
+    av1_tree_to_cdf(av1_mv_joint_tree, cm->fc->nmvc.joints,
+                    cm->fc->nmvc.joint_cdf);
 #endif
     update_ext_tx_probs(cm, header_bc);
 #if CONFIG_SUPERTX

av1/encoder/encodemv.c

@@ -239,7 +239,11 @@ void av1_encode_mv(AV1_COMP *cpi, aom_writer *w, const MV *mv, const MV *ref,
 #if CONFIG_REF_MV
   (void)is_compound;
 #endif
+#if CONFIG_DAALA_EC
+  aom_write_symbol(w, j, mvctx->joint_cdf, MV_JOINTS);
+#else
   av1_write_token(w, av1_mv_joint_tree, mvctx->joints, &mv_joint_encodings[j]);
+#endif
   if (mv_joint_vertical(j))
     encode_mv_component(w, diff.row, &mvctx->comps[0], usehp);