[FFmpeg-cvslog] avcodec/rangecoder: Avoid checking for the first byte on every renormalization

[Michael Niedermayer]

ffmpeg | branch: master | Michael Niedermayer <michael at niedermayer.cc> | Wed Oct 16 21:08:31 2024 +0200| [70fa8bd38cdb62cf225471c2dbf6779c348f9b67] | committer: Michael Niedermayer

avcodec/rangecoder: Avoid checking for the first byte on every renormalization

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

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=70fa8bd38cdb62cf225471c2dbf6779c348f9b67
---

 libavcodec/rangecoder.h | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/libavcodec/rangecoder.h b/libavcodec/rangecoder.h
index da13c453ed..944ad492fd 100644
--- a/libavcodec/rangecoder.h
+++ b/libavcodec/rangecoder.h
@@ -62,10 +62,9 @@ void ff_build_rac_states(RangeCoder *c, int factor, int max_p);
 static inline void renorm_encoder(RangeCoder *c)
 {
     // FIXME: optimize
-        if (c->outstanding_byte < 0) {
-            c->outstanding_byte = c->low >> 8;
-        } else if (c->low <= 0xFF00) {
-            *c->bytestream++ = c->outstanding_byte;
+        if (c->low <= 0xFF00) {
+            *c->bytestream = c->outstanding_byte;
+            c->bytestream += c->outstanding_byte >= 0;
             for (; c->outstanding_count; c->outstanding_count--)
                 *c->bytestream++ = 0xFF;
             c->outstanding_byte = c->low >> 8;