[FFmpeg-cvslog] libswscale/swscale: initialize all dst plane pointers in sws_receive_slice()

[James Almer]

ffmpeg | branch: master | James Almer <jamrial at gmail.com> | Mon Sep  6 12:00:51 2021 -0300| [5fe648d04a2af3229704b26f114ba87158b9e9d2] | committer: James Almer

libswscale/swscale: initialize all dst plane pointers in sws_receive_slice()

Fixes valgrind warnings about use of uninitialised values.

Signed-off-by: James Almer <jamrial at gmail.com>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=5fe648d04a2af3229704b26f114ba87158b9e9d2
---

 libswscale/swscale.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/libswscale/swscale.c b/libswscale/swscale.c
index c233818dcf..b9c9647fcb 100644
--- a/libswscale/swscale.c
+++ b/libswscale/swscale.c
@@ -1160,9 +1160,9 @@ int sws_receive_slice(struct SwsContext *c, unsigned int slice_start,
         return ret;
     }
 
-    for (int i = 0; i < FF_ARRAY_ELEMS(dst) && c->frame_dst->data[i]; i++) {
-        dst[i] = c->frame_dst->data[i] +
-                 c->frame_dst->linesize[i] * (slice_start >> c->chrDstVSubSample);
+    for (int i = 0; i < FF_ARRAY_ELEMS(dst); i++) {
+        ptrdiff_t offset = c->frame_dst->linesize[i] * (slice_start >> c->chrDstVSubSample);
+        dst[i] = FF_PTR_ADD(c->frame_dst->data[i], offset);
     }
 
     return scale_internal(c, (const uint8_t * const *)c->frame_src->data,