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Add predictive filtering option for Alpha.

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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
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1
Makefile.vc
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@ -178,6 +178,7 @@ X_OBJS= \
$(DIROBJ)\utils\alpha.obj \
$(DIROBJ)\utils\bit_reader.obj \
$(DIROBJ)\utils\bit_writer.obj \
$(DIROBJ)\utils\filters.obj \
$(DIROBJ)\utils\quant_levels.obj \
$(DIROBJ)\utils\tcoder.obj \
$(DIROBJ)\utils\thread.obj \