[FFmpeg-cvslog] avcodec/ffv1dec: Fix end computation with ec=2

[Michael Niedermayer]

ffmpeg | branch: release/4.2 | Michael Niedermayer <michael at niedermayer.cc> | Thu Oct 10 20:39:23 2024 +0200| [bcee885d181a70f5c4ca75596cf1e7ccc8793654] | committer: Michael Niedermayer

avcodec/ffv1dec: Fix end computation with ec=2

Sponsored-by: Sovereign Tech Fund
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
(cherry picked from commit 10e5af15bf220d9da128ca12d2d474ff6ab0076e)
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=bcee885d181a70f5c4ca75596cf1e7ccc8793654
---

 libavcodec/ffv1dec.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavcodec/ffv1dec.c b/libavcodec/ffv1dec.c
index 69aa898521..61b07e3c9f 100644
--- a/libavcodec/ffv1dec.c
+++ b/libavcodec/ffv1dec.c
@@ -364,7 +364,7 @@ static int decode_slice(AVCodecContext *c, void *arg)
     if (fs->ac != AC_GOLOMB_RICE && f->version > 2) {
         int v;
         get_rac(&fs->c, (uint8_t[]) { 129 });
-        v = fs->c.bytestream_end - fs->c.bytestream - 2 - 5*f->ec;
+        v = fs->c.bytestream_end - fs->c.bytestream - 2 - 5*!!f->ec;
         if (v) {
             av_log(f->avctx, AV_LOG_ERROR, "bytestream end mismatching by %d\n", v);
             fs->slice_damaged = 1;