Changeset 11b47038 in ffmpeg

Timestamp:

Jun 4, 2014, 11:12:48 AM (11 years ago)

Author:

Michael Niedermayer <michaelni@gmx.at>

Branches:

master

Children:

deadcf5e

Parents:

c7e54628

git-author:

Christophe Gisquet <christophe.gisquet@gmail.com> (06/03/14 14:38:36)

git-committer:

Michael Niedermayer <michaelni@gmx.at> (06/04/14 11:12:48)

Message:

huffyuvdec: implement trick

When the joint table does not contain a valid entry, the decoding restarts
from scratch. By implementing the trick of jumping to the 2nd level of the
individual table (and inlining the whole), a speed improvement of 5-10%
is possible.

On a 1000-frames YUV4:2:0 video, before:
362851 decicycles in 422, 262094 runs, 50 skips
182488 decicycles in gray, 262087 runs, 57 skips
Object size: 23584
Overall time: 8.377

After:
346800 decicycles in 422, 262079 runs, 65 skips
168197 decicycles in gray, 262077 runs, 67 skips
Object size: 23188
Overall time: 7.878

Signed-off-by: Michael Niedermayer <​michaelni@gmx.at>

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