diff options
| author | Jose Da Silva <digital@joescat.com> | 2021-01-31 19:51:04 -0800 |
|---|---|---|
| committer | Paul B Mahol <onemda@gmail.com> | 2021-02-03 16:03:15 +0100 |
| commit | 8c3d31fbeee157d6f529402c86371c857026fcff (patch) | |
| tree | 8c2771bd576265420e085ab84acc2e397f90d2d6 | |
| parent | 42c636c9722f64fe6290ea8eee13658d25f5fbe3 (diff) | |
avcodec/xbmdec: convert() minor speed increase
If we test for {0..9} first, we have tested for 10/16th of all possible
characters first and avoid testing the remaining 6/16th of all possible
characters, which can be either 6/16th lowercase or 6/16th uppercase.
Signed-off-by: Joe Da Silva <digital@joescat.com>
| -rw-r--r-- | libavcodec/xbmdec.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/libavcodec/xbmdec.c b/libavcodec/xbmdec.c index b783d5abe5..52615dc7ab 100644 --- a/libavcodec/xbmdec.c +++ b/libavcodec/xbmdec.c @@ -28,12 +28,12 @@ static int convert(uint8_t x) { - if (x >= 'a') - x -= 87; - else if (x >= 'A') - x -= 55; - else + if (x <= '9') x -= '0'; + else if (x >= 'a') + x -= ('a' - 10); + else + x -= ('A' - 10); return x; } |