Merge changes I660c1b7f,Id3cdf6b6

* changes:
  vp9_loop_filter_frame_mt: defer allocations
  vp9_loop_filter_alloc: reorder parameters

vp9/decoder/vp9_dthread.c

@@ -145,15 +145,13 @@ void vp9_loop_filter_frame_mt(YV12_BUFFER_CONFIG *frame,
   const int num_workers = MIN(pbi->max_threads & ~1, tile_cols);
   int i;
 
-  // Allocate memory used in thread synchronization.
-  // This always needs to be done even if frame_filter_level is 0.
+  if (!frame_filter_level) return;
+
   if (!lf_sync->sync_range || cm->last_height != cm->height) {
     vp9_loop_filter_dealloc(lf_sync);
-    vp9_loop_filter_alloc(cm, lf_sync, sb_rows, cm->width);
+    vp9_loop_filter_alloc(lf_sync, cm, sb_rows, cm->width);
   }
 
-  if (!frame_filter_level) return;
-
   vp9_loop_filter_frame_init(cm, frame_filter_level);
 
   // Initialize cur_sb_col to -1 for all SB rows.
@@ -216,7 +214,7 @@ static int get_sync_range(int width) {
 }
 
 // Allocate memory for lf row synchronization
-void vp9_loop_filter_alloc(VP9_COMMON *cm, VP9LfSync *lf_sync, int rows,
+void vp9_loop_filter_alloc(VP9LfSync *lf_sync, VP9_COMMON *cm, int rows,
                            int width) {
   lf_sync->rows = rows;
 #if CONFIG_MULTITHREAD

vp9/decoder/vp9_dthread.h

@@ -42,8 +42,8 @@ typedef struct VP9LfSyncData {
 } VP9LfSync;
 
 // Allocate memory for loopfilter row synchronization.
-void vp9_loop_filter_alloc(struct VP9Common *cm, VP9LfSync *lf_sync,
-                           int rows, int width);
+void vp9_loop_filter_alloc(VP9LfSync *lf_sync, VP9_COMMON *cm, int rows,
+                           int width);
 
 // Deallocate loopfilter synchronization related mutex and data.
 void vp9_loop_filter_dealloc(VP9LfSync *lf_sync);