7 Commits

Author	SHA1	Message	Date
Pascal Massimino	32462a072c	Speedup to HuffmanCostCombinedCount ... ~3% speedup for lossless encoding Improves compression ratio by ~0.03% Change-Id: Ic6d05fb0b1099b5ca56689b92b1c6515d54a5d6b	2015-06-23 16:41:03 +02:00
Pascal Massimino	f3d687e3fa	SSE4.1 implementation of some lossless encoding functions ... New implementations: SubtractGreenFromBlueAndRed and TransformColor around 1-2% faster lossless encoding. Change-Id: I1668e36fdc316ba55b3b798b91b4a3e36ce62861	2015-06-23 08:46:57 +02:00
James Zern	65ef5afc27	Merge "lossless: 0.13% compression density gain"	2015-06-03 03:02:09 +00:00
Jyrki Alakuijala	2beef2f245	lossless: 0.13% compression density gain ... over a 1000 image corpus Single photograph benchmark: Before: Q=20: 2.560 MP/s Q=40: 2.593 MP/s Q=60: 1.795 MP/s Q=80: 1.603 MP/s Q=99: 1.122 MP/s After: Q=20: 3.334 MP/s Q=40: 2.464 MP/s Q=60: 2.009 MP/s Q=80: 1.871 MP/s Q=99: 1.163 MP/s This CL allows for some further improvements that would not be possible otherwise. Change-Id: I61ba154beca2266cb96469281cf96e84a4412586	2015-06-02 17:27:36 -07:00
Pascal Massimino	3033f24c26	lossless: 0.06 % compression density improvement ... Change-Id: Ib662e6aec53b40d6bc736d3ecfd6475bb005c790	2015-06-02 14:51:51 +02:00
Pascal Massimino	c64659e1b4	remove duplicate variables after the lossless{_enc}.c split ... clang was giving "duplicate symbols" error messages at link time. Change-Id: I2b77b55222fe033cc1d4636567902e80d814aab6	2015-03-25 11:10:21 +01:00
James Zern	553051f741	dsp/lossless: split enc/dec functions ... adds lossless_enc*.c; reduces the size of the decode-only so: ~78K w/gcc-4.8.2 on x86_64. Change-Id: If5e4610b67d05eba5896bc64bab79e9df92b2092	2015-03-23 22:57:50 -07:00