[FFmpeg-cvslog] avcodec/wavpackenc: Use unsigned for potential 31bit shift

[Michael Niedermayer]

ffmpeg | branch: release/4.3 | Michael Niedermayer <michael at niedermayer.cc> | Sun May 19 04:49:15 2024 +0200| [99c8b0ac22d58cc42d0eee6e6929987ebc7d1dd2] | committer: Michael Niedermayer

avcodec/wavpackenc: Use unsigned for potential 31bit shift

Fixes: CID1465481 Unintentional integer overflow

Sponsored-by: Sovereign Tech Fund
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
(cherry picked from commit 6f976db251864ad698c935130370774783bf12f4)
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=99c8b0ac22d58cc42d0eee6e6929987ebc7d1dd2
---

 libavcodec/wavpackenc.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/libavcodec/wavpackenc.c b/libavcodec/wavpackenc.c
index 0c85fbe374..2bc5890087 100644
--- a/libavcodec/wavpackenc.c
+++ b/libavcodec/wavpackenc.c
@@ -1976,7 +1976,7 @@ static void encode_flush(WavPackEncodeContext *s)
                 put_bits(pb, 31, 0x7FFFFFFF);
                 cbits -= 31;
             } else {
-                put_bits(pb, cbits, (1 << cbits) - 1);
+                put_bits(pb, cbits, (1U << cbits) - 1);
                 cbits = 0;
             }
         } while (cbits);
@@ -2005,7 +2005,7 @@ static void encode_flush(WavPackEncodeContext *s)
                     put_bits(pb, 31, 0x7FFFFFFF);
                     cbits -= 31;
                 } else {
-                    put_bits(pb, cbits, (1 << cbits) - 1);
+                    put_bits(pb, cbits, (1U << cbits) - 1);
                     cbits = 0;
                 }
             } while (cbits);