Add predictive filtering option for Alpha.

Add predictive filtering option for Alpha plane.
Valid range for filter option is [0, 5] corresponding to prediction
methods none, horizontal, vertical, gradient & paeth filter.
The prediction method 5 will try all the prediction methods (0 to 4)
and pick the prediction method that gives best compression.

Change-Id: I9244d4a9c5017501a9696c7cec5045f04c16d49b
This commit is contained in:
Vikas Arora
2012-01-05 13:04:30 +05:30
parent e852f83205
commit 252028aaac
13 changed files with 424 additions and 28 deletions

View File

@ -34,6 +34,7 @@ LOCAL_SRC_FILES := \
src/utils/alpha.c \
src/utils/bit_reader.c \
src/utils/bit_writer.c \
src/utils/filters.c \
src/utils/quant_levels.c \
src/utils/tcoder.c \
src/utils/thread.c \