a WebP encoder

converts PNG & JPEG to WebP

This is an experimental early version, with lot of room
of later optimizations in both speed and quality.

Compile with the usual `./configure && make`
Command line example is examples/cwebp

Usage:

   cwebp [options] -q quality input.png -o output.webp

where 'quality' is between 0 (poor) to 100 (very good).
Typical value is around 80.

More encoding options with 'cwebp -longhelp'

Change-Id: I577a94f6f622a0c44bdfa9daf1086ace89d45539

Android.mk

@@ -2,21 +2,33 @@ LOCAL_PATH:= $(call my-dir)
 
 include $(CLEAR_VARS)
 LOCAL_SRC_FILES := \
-	src/bits.c \
-	src/dsp.c \
-	src/frame.c \
-	src/quant.c \
-	src/tree.c \
-	src/vp8.c \
-	src/webp.c \
-	src/yuv.c
+	src/dec/bits.c \
+	src/dec/dsp.c \
+	src/dec/frame.c \
+	src/dec/quant.c \
+	src/dec/tree.c \
+	src/dec/vp8.c \
+	src/dec/webp.c \
+	src/dec/yuv.c \
+	src/enc/analysis.c \
+	src/enc/bit_writer.c \
+	src/enc/config.c \
+	src/enc/dsp.c \
+	src/enc/filter.c \
+	src/enc/frame.c \
+	src/enc/iterator.c \
+	src/enc/picture.c \
+	src/enc/quant.c \
+	src/enc/syntax.c \
+	src/enc/tree.c \
+	src/enc/webpenc.c
 
 LOCAL_CFLAGS := -Wall -DANDROID -DHAVE_MALLOC_H -DHAVE_PTHREAD \
                 -finline-functions -frename-registers -ffast-math \
-                -s -fomit-frame-pointer
+                -s -fomit-frame-pointer -Isrc/webp
 
 LOCAL_C_INCLUDES += $(LOCAL_PATH)/src
 
-LOCAL_MODULE:= webp-decode
+LOCAL_MODULE:= webp
 
 include $(BUILD_STATIC_LIBRARY)