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NEON: implement several alpha-processing functions

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- ApplyAlphaMultiply
 - DispatchAlpha
 - DispatchAlphaToGreen
 - ExtractAlpha

Decoding to Argb / rgbA / ... is 10-15% faster (measured on N4)

new file: alpha_processing_neon.c

Change-Id: I40f1a809e9885d1031ff0bc886d8d001efa66bca
This commit is contained in:
Pascal Massimino
2017-01-11 17:39:29 +01:00
parent 48b1e85fbe
commit 49d0280df1
7 changed files with 190 additions and 0 deletions
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src/dsp/Makefile.am
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@ -74,6 +74,7 @@ libwebpdspdecode_sse2_la_CPPFLAGS = $(libwebpdsp_sse2_la_CPPFLAGS)
libwebpdspdecode_sse2_la_CFLAGS = $(libwebpdsp_sse2_la_CFLAGS)
libwebpdspdecode_neon_la_SOURCES =
libwebpdspdecode_neon_la_SOURCES += alpha_processing_neon.c
libwebpdspdecode_neon_la_SOURCES += dec_neon.c
libwebpdspdecode_neon_la_SOURCES += lossless_neon.c
libwebpdspdecode_neon_la_SOURCES += neon.h