EstimateBestFilter: use an int to iterate WEBP_FILTER_TYPE

this change allows the code to be built with a C++ compiler without the
addition of an operator++

Change-Id: I2f2fae720b9772abfc3c540bb2e3bf9107d96cc9
fix bug due to overzealous check in WebPPictureYUVAToARGB()

This tests prevented views to be converted to ARGB

https://code.google.com/p/webp/issues/detail?id=178

Change-Id: I5ba66da2791e6f1d2bfd8c55b5fffe6955263374
cosmetics: fix a few typos

Change-Id: I73b1900b2d960c4c57ef7078df137c776b321a1b
Android.mk: add some release compile flags

-ffunction-sections / -fdata-sections
can improve final binary size when used with --gc-sections, speed impact
untested

Change-Id: I37f4b5da2f34acede7965c2da2e1b97125473adc
Merge "EstimateBestFilter: use an int to iterate WEBP_FILTER_TYPE"
Merge "fix bug due to overzealous check in WebPPictureYUVAToARGB()"
fix -print_psnr / ssim options

original/compressed pictures were not converted to an adequate YUVA
colorspace before computing the distortion.

Change-Id: I37775e9b7dbd6eca16c38e235e1df325858d36a1
Merge "fix -print_psnr / ssim options"
makefile.unix: install binaries in $(DESTDIR)/bin/

Change-Id: I6c8f87aaa185fc043b80800430d99deaa1e5966b
dwebp: remove a dead store

Change-Id: I48205472e99e997702d25c39f1b4d7a4699c15d6
cosmetics: dwebp: fix local function name format

error_function -> PNGErrorFunction

Change-Id: Ic6c0e676cc47bca2c1a1e0d8e95639e780982b1b
Merge "Android.mk: add some release compile flags"
Merge "makefile.unix: install binaries in $(DESTDIR)/bin/"
Merge "dwebp: remove a dead store"
Merge "cosmetics: dwebp: fix local function name format"
* fix off-by-one zthresh calculation
* remove the sharpening for non luma-AC coeffs
* adjust the bias a little bit to compensate for this

Using the multiply-by-reciprocal doesn't always give the same result
as the exact divide, given the QFIX fixed-point precision we use.
-> removed few now-unneeded SSE2 instructions (and checked for
bit-exactness using -noasm)

Change-Id: Ib68057cbdd69c4e589af56a01a8e7085db762c24