diff mbox series

[FFmpeg-devel,1/5] avcodec/rangecoder: only perform renorm check/loop for callers that need it

Message ID 20241016132639.1958007-1-michael@niedermayer.cc
State New
Headers show
Series [FFmpeg-devel,1/5] avcodec/rangecoder: only perform renorm check/loop for callers that need it | expand

Commit Message

Michael Niedermayer Oct. 16, 2024, 1:26 p.m. UTC 
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
---
 libavcodec/rangecoder.h | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)
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Patch

diff --git a/libavcodec/rangecoder.h b/libavcodec/rangecoder.h
index 89d178ac314..110908d6bdd 100644
--- a/libavcodec/rangecoder.h
+++ b/libavcodec/rangecoder.h
@@ -62,7 +62,6 @@  void ff_build_rac_states(RangeCoder *c, int factor, int max_p);
 static inline void renorm_encoder(RangeCoder *c)
 {
     // FIXME: optimize
-    while (c->range < 0x100) {
         if (c->outstanding_byte < 0) {
             c->outstanding_byte = c->low >> 8;
         } else if (c->low <= 0xFF00) {
@@ -81,7 +80,6 @@  static inline void renorm_encoder(RangeCoder *c)
 
         c->low     = (c->low & 0xFF) << 8;
         c->range <<= 8;
-    }
 }
 
 static inline int get_rac_count(RangeCoder *c)
@@ -108,7 +106,8 @@  static inline void put_rac(RangeCoder *c, uint8_t *const state, int bit)
         *state   = c->one_state[*state];
     }
 
-    renorm_encoder(c);
+    while (c->range < 0x100)
+        renorm_encoder(c);
 }
 
 static inline void refill(RangeCoder *c)