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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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FFmpeg README
- Documentation
-
Read the documentation in the doc/ directory in git.
You can also view it online at http://ffmpeg.org/documentation.html
- Licensing
- See the LICENSE file.
- Build and Install
- See the INSTALL file.
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