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

[Andreas Rheinhardt]

ffmpeg | branch: master | Andreas Rheinhardt <andreas.rheinhardt at outlook.com> | Sat Jul 23 04:28:03 2022 +0200| [94dd8f421eedf58c3399f25dee169790b28c614b] | committer: Andreas Rheinhardt

avcodec/wavpack: 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=94dd8f421eedf58c3399f25dee169790b28c614b
---

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

diff --git a/libavcodec/wavpack.c b/libavcodec/wavpack.c
index 0e8d1286c2..c12e1d6ec6 100644
--- a/libavcodec/wavpack.c
+++ b/libavcodec/wavpack.c
@@ -1616,7 +1616,7 @@ static void wavpack_decode_flush(AVCodecContext *avctx)
 
 static int dsd_channel(AVCodecContext *avctx, void *frmptr, int jobnr, int threadnr)
 {
-    WavpackContext *s  = avctx->priv_data;
+    const WavpackContext *s  = avctx->priv_data;
     AVFrame *frame = frmptr;
 
     ff_dsd2pcm_translate (&s->dsdctx [jobnr], s->samples, 0,