[FFmpeg-cvslog] r19974 - trunk/libavcodec/vp3.c
melanson
subversion
Wed Sep 23 07:38:12 CEST 2009
Author: melanson
Date: Wed Sep 23 07:38:12 2009
New Revision: 19974
Log:
Another micro-optimization for unpack_vlcs(): Eliminate a possible
branch and save around 45k-55k dezicycles per function run.
Modified:
trunk/libavcodec/vp3.c
Modified: trunk/libavcodec/vp3.c
==============================================================================
--- trunk/libavcodec/vp3.c Wed Sep 23 00:44:56 2009 (r19973)
+++ trunk/libavcodec/vp3.c Wed Sep 23 07:38:12 2009 (r19974)
@@ -1070,10 +1070,9 @@ static int unpack_vlcs(Vp3DecodeContext
coeff = zero_run = 0;
} else {
bits_to_get = coeff_get_bits[token];
- if (!bits_to_get)
- coeff = coeff_tables[token][0];
- else
- coeff = coeff_tables[token][get_bits(gb, bits_to_get)];
+ if (bits_to_get)
+ bits_to_get = get_bits(gb, bits_to_get);
+ coeff = coeff_tables[token][bits_to_get];
zero_run = zero_run_base[token];
if (zero_run_get_bits[token])
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