avcodec/hevcdec: Add pointers to logctx and parent ctx to HEVCLocalCtx

It is safe for a slice thread to read the main context
and therefore it is safe to add a pointer to const HEVCContext
(namely the parent context) to each HEVCLocalContext.
It is also safe (and actually redundant) to add a pointer
to a logcontext to HEVCLocalContext.

Doing so allows to pass the HEVCLocalContext as context in
the parts of the code that is run slice-threaded when slice-threading
is in use (currently these parts of the code use ordinary
HEVCContext*). This way one is not tempted to modify
the main context from the slice contexts.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/libavcodec/hevcdec.h b/libavcodec/hevcdec.h
index f6acf845ae..271a55df2f 100644
--- a/libavcodec/hevcdec.h
+++ b/libavcodec/hevcdec.h
@@ -428,6 +428,9 @@ typedef struct HEVCLocalContext {
 
     uint8_t first_qp_group;
 
+    void *logctx;
+    const struct HEVCContext *parent;
+
     GetBitContext gb;
     CABACContext cc;