libwebp

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History

Vikas Arora fef22704ec Optimize and re-structure VP8LGetHistoImageSymbols

Optimize and re-structured VP8LGetHistoImageSymbols method, by using the bin-hash
for merging the Histograms more efficiently, instead of the randomized
heuristic of existing method HistogramCombine.

This change speeds up the Lossless encoding by 40-50% (for method=4 and Q > 50)
with 0.8% penalty in compression density. For lower method, the speed up is 25-30%,
with 0.4% penalty in the compression density.

Change-Id: If61adadb1a041b95def6405aa1fe3b83c3cb25ce

2014-03-13 11:48:37 -07:00

dec

Rescale: let ImportRow / ExportRow be pointer-to-function

2014-02-17 00:58:17 -08:00

demux

bump version to 0.4.0

2013-12-18 19:20:00 -08:00

dsp

Optimize lossless decoding.

2014-03-13 11:27:12 -07:00

enc

Optimize and re-structure VP8LGetHistoImageSymbols