From f800d6508d7e8fbd8d9777b775d333a4f02112ef Mon Sep 17 00:00:00 2001
From: "Ronald S. Bultje" <rsbultje@gmail.com>
Date: Tue, 28 Mar 2017 19:37:42 -0400
Subject: [PATCH] dnxhd: initialize DNXHDContext::avctx to each thread's
 respective one.

Otherwise all thread's private contexts have the avctx pointer set to
the AVCodecContext of the first thread, which means all writes to
ctx->avctx->* (in e.g. read_header) are effectively race conditions.

Fixes fate-dnxhd under tsan.
---
 libavcodec/dnxhddec.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/libavcodec/dnxhddec.c b/libavcodec/dnxhddec.c
index f67763ef47..383e64ca9e 100644
--- a/libavcodec/dnxhddec.c
+++ b/libavcodec/dnxhddec.c
@@ -145,6 +145,7 @@ static av_cold int dnxhd_decode_init_thread_copy(AVCodecContext *avctx)
 {
     DNXHDContext *ctx = avctx->priv_data;
 
+    ctx->avctx = avctx;
     // make sure VLC tables will be loaded when cid is parsed
     ctx->cid = -1;