ffmpeg | branch: master | John Cox <j...@kynesim.co.uk> | Wed Jan 20 17:56:30 2016 +0000| [5115d8326e8eba707ee3048930674e2f9058d913] | committer: Michael Niedermayer
cabac_functions: Count zeros with ctz if it is fast When refilling the low bit buffer after get_cabac count the bits with ctz if the processor has a fast version. Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> > http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=5115d8326e8eba707ee3048930674e2f9058d913 --- libavcodec/cabac_functions.h | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/libavcodec/cabac_functions.h b/libavcodec/cabac_functions.h index 31c919b..42841c7 100644 --- a/libavcodec/cabac_functions.h +++ b/libavcodec/cabac_functions.h @@ -76,9 +76,12 @@ static inline void renorm_cabac_decoder_once(CABACContext *c){ static void refill2(CABACContext *c){ int i; unsigned x; - +#if !HAVE_FAST_CLZ x= c->low ^ (c->low-1); i= 7 - ff_h264_norm_shift[x>>(CABAC_BITS-1)]; +#else + i = ff_ctz(c->low) - CABAC_BITS; +#endif x= -CABAC_MASK; _______________________________________________ ffmpeg-cvslog mailing list ffmpeg-cvslog@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-cvslog
