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Another micro-optimization for unpack_vlcs(): Eliminate a possible

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branch and save around 45k-55k dezicycles per function run.

Originally committed as revision 19974 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Mike Melanson 2009-09-23 05:38:12 +00:00
parent 4c0dda2b3f
commit 428984b041
1 changed files with 3 additions and 4 deletions
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7
libavcodec/vp3.c
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@ -1070,10 +1070,9 @@ static int unpack_vlcs(Vp3DecodeContext *s, GetBitContext *gb,
coeff = zero_run = 0; coeff = zero_run = 0;
} else { } else {
bits_to_get = coeff_get_bits[token]; bits_to_get = coeff_get_bits[token];
if (!bits_to_get) if (bits_to_get)
coeff = coeff_tables[token][0]; bits_to_get = get_bits(gb, bits_to_get);
else coeff = coeff_tables[token][bits_to_get];
coeff = coeff_tables[token][get_bits(gb, bits_to_get)];
zero_run = zero_run_base[token]; zero_run = zero_run_base[token];
if (zero_run_get_bits[token]) if (zero_run_get_bits[token])