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-rw-r--r--libavfilter/vf_hqx.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/libavfilter/vf_hqx.c b/libavfilter/vf_hqx.c
index 00a7c531ff..77e8f13214 100644
--- a/libavfilter/vf_hqx.c
+++ b/libavfilter/vf_hqx.c
@@ -24,6 +24,7 @@
*
* @see http://en.wikipedia.org/wiki/Hqx
* @see http://web.archive.org/web/20131114143602/http://www.hiend3d.com/hq3x.html
+ * @see http://blog.pkh.me/p/19-butchering-hqx-scaling-filters.html
*/
#include "libavutil/opt.h"