vp9_ethread: modify VP9_COMP structure

This patch modified struct VP9_COMP. Created a struct ThreadData
to include data that need to be copied for each thread. In
multiple thread case, one thread processes one tile. all threads
share one copy of VP9_COMP,
(refer to VP9_COMP *cpi in the code)
but each thread has its own copy of ThreadData,
(refer to ThreadData *td in the code).
Therefore, within the scope of encode_tiles(), both cpi and td
need to be passed as function parameters.

In single thread case, the FRAME_COUNTS pointer in ThreadData
points to "counts" in VP9_COMMON.

Change-Id: Ib37908b2d8e2c0f4f9c18f38017df5ce60e8b13e

1 files changed, 3 insertions, 2 deletions

diff --git a/vp9/encoder/vp9_context_tree.h b/vp9/encoder/vp9_context_tree.h
index 1710783e7..70bf032c3 100644
--- a/vp9/encoder/vp9_context_tree.h
+++ b/vp9/encoder/vp9_context_tree.h
@@ -15,6 +15,7 @@
 
 struct VP9_COMP;
 struct VP9Common;
+struct ThreadData;
 
 // Structure to hold snapshot of coding context during the mode picking process
 typedef struct {
@@ -79,7 +80,7 @@ typedef struct PC_TREE {
   };
 } PC_TREE;
 
-void vp9_setup_pc_tree(struct VP9Common *cm, struct VP9_COMP *cpi);
-void vp9_free_pc_tree(struct VP9_COMP *cpi);
+void vp9_setup_pc_tree(struct VP9Common *cm, struct ThreadData *td);
+void vp9_free_pc_tree(struct ThreadData *td);
 
 #endif /* VP9_ENCODER_VP9_CONTEXT_TREE_H_ */