[FFmpeg-cvslog] avcodec/dxv: Constify slice threads' ptr to main context

[Andreas Rheinhardt]

ffmpeg | branch: master | Andreas Rheinhardt <andreas.rheinhardt at outlook.com> | Sat Jul 23 06:14:32 2022 +0200| [5ad29e15908523c423c881bce2aaf62e433169b6] | committer: Andreas Rheinhardt

avcodec/dxv: Constify slice threads' ptr to main context

Modifying the main context from a slice thread is (usually)
a data race, so it must not happen. So only use a pointer to const
to access the main context.

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

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=5ad29e15908523c423c881bce2aaf62e433169b6
---

 libavcodec/dxv.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavcodec/dxv.c b/libavcodec/dxv.c
index f36454a9f6..13c028d8ba 100644
--- a/libavcodec/dxv.c
+++ b/libavcodec/dxv.c
@@ -193,7 +193,7 @@ static int yao_block(uint8_t *plane0, ptrdiff_t stride0,
 static int decompress_texture_thread(AVCodecContext *avctx, void *arg,
                                      int slice, int thread_nb)
 {
-    DXVContext *ctx = avctx->priv_data;
+    const DXVContext *ctx = avctx->priv_data;
     AVFrame *frame = arg;
     const uint8_t *d = ctx->tex_data;
     int w_block = avctx->coded_width / ctx->texture_block_w;