libwebp

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skal b7490f8553 introduce WEBP_REFERENCE_IMPLEMENTATION compile option

This flag will make the code use no uint64, no asm, and no fancy
trick, but instead aim at being as simple and straightforward as
possible.
Main use is to help emscripten generate proper JS code.
More code needs to be simplified later.

Also: tune the BITS values to be 24 and make use of WEBP_RIGHT_JUSTIFY
Here are the typical timing for decoding a large image:

        ARM7-a:
        dwebp_justify_32_neon Time to decode picture: 3.280s
        dwebp_justify_24_neon Time to decode picture: 2.640s
        dwebp_justify_16_neon Time to decode picture: 2.723s
        dwebp_justify_8_neon Time to decode picture: 2.802s
        dwebp_justify_32 Time to decode picture: 4.264s
        dwebp_justify_24 Time to decode picture: 3.696s
        dwebp_justify_16 Time to decode picture: 3.779s
        dwebp_justify_8 Time to decode picture: 3.834s
        dwebp_32_neon Time to decode picture: 4.010s
        dwebp_24_neon Time to decode picture: 2.725s
        dwebp_16_neon Time to decode picture: 2.852s
        dwebp_8_neon Time to decode picture: 2.778s
        dwebp_32 Time to decode picture: 4.587s
        dwebp_24 Time to decode picture: 3.800s
        dwebp_16 Time to decode picture: 3.902s
        dwebp_8 Time to decode picture: 3.815s
        REFERENCE (HEAD) Time to decode picture: 3.818s

        x86_64:
        dwebp_justify_32 Time to decode picture: 0.473s
        dwebp_justify_24 Time to decode picture: 0.434s
        dwebp_justify_16 Time to decode picture: 0.450s
        dwebp_justify_8 Time to decode picture: 0.467s
        dwebp_32 Time to decode picture: 0.474s
        dwebp_24 Time to decode picture: 0.468s
        dwebp_16 Time to decode picture: 0.468s
        dwebp_8 Time to decode picture: 0.481s
        REFERENCE (HEAD) Time to decode picture: 0.436s

        i386:
        dwebp_justify_32 Time to decode picture: 0.723s
        dwebp_justify_24 Time to decode picture: 0.618s
        dwebp_justify_16 Time to decode picture: 0.626s
        dwebp_justify_8 Time to decode picture: 0.651s
        dwebp_32 Time to decode picture: 0.744s
        dwebp_24 Time to decode picture: 0.627s
        dwebp_16 Time to decode picture: 0.642s
        dwebp_8 Time to decode picture: 0.642s

Change-Id: Ie56c7235733a24f94fbfc2e4351aae36ec39c225

2013-02-14 15:46:12 +01:00

dec

allow WebPINewRGB/YUVA to be passed a NULL output buffer.

2013-01-28 00:07:32 -08:00

demux

Fix for demuxer frame iteration:

2013-01-29 10:58:04 -08:00

dsp

introduce WEBP_REFERENCE_IMPLEMENTATION compile option

2013-02-14 15:46:12 +01:00

enc

Merge "add a -jpeg_like option"