[FFmpeg-cvslog] swscale/utils: Use normal bilinear scaler if fast cannot be used due to tiny dimensions

[Michael Niedermayer]

ffmpeg | branch: release/2.4 | Michael Niedermayer <michael at niedermayer.cc> | Mon Jan  4 23:22:25 2016 +0100| [7ea0e525edc11fa87ed7ada15f0188b18f3da4a2] | committer: Michael Niedermayer

swscale/utils: Use normal bilinear scaler if fast cannot be used due to tiny dimensions

Fixes Ticket4960

Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
(cherry picked from commit 1edf129cbc897447a289ca8b045853df5df1bab3)

Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=7ea0e525edc11fa87ed7ada15f0188b18f3da4a2
---

 libswscale/utils.c |    6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/libswscale/utils.c b/libswscale/utils.c
index 6495804..09310b4 100644
--- a/libswscale/utils.c
+++ b/libswscale/utils.c
@@ -1056,6 +1056,12 @@ av_cold int sws_init_context(SwsContext *c, SwsFilter *srcFilter,
                srcW, srcH, dstW, dstH);
         return AVERROR(EINVAL);
     }
+    if (flags & SWS_FAST_BILINEAR) {
+        if (srcW < 8 || dstW < 8) {
+            flags ^= SWS_FAST_BILINEAR | SWS_BILINEAR;
+            c->flags = flags;
+        }
+    }
 
     if (!dstFilter)
         dstFilter = &dummyFilter;