[FFmpeg-cvslog] avformat/sccdec: Make constants more intelligible

[Andreas Rheinhardt]

ffmpeg | branch: master | Andreas Rheinhardt <andreas.rheinhardt at outlook.com> | Fri Oct  1 15:30:30 2021 +0200| [ac42b604415af9e72b61ae58976e6b5c4c7499c7] | committer: Andreas Rheinhardt

avformat/sccdec: Make constants more intelligible

Reviewed-by: Paul B Mahol <onemda at gmail.com>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt at outlook.com>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=ac42b604415af9e72b61ae58976e6b5c4c7499c7
---

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

diff --git a/libavformat/sccdec.c b/libavformat/sccdec.c
index cd45bda8c9..286b1b3b0e 100644
--- a/libavformat/sccdec.c
+++ b/libavformat/sccdec.c
@@ -51,9 +51,9 @@ static int scc_probe(const AVProbeData *p)
 static int convert(uint8_t x)
 {
     if (x >= 'a')
-        x -= 87;
+        x -= 'a' - 10;
     else if (x >= 'A')
-        x -= 55;
+        x -= 'A' - 10;
     else
         x -= '0';
     return x;