Add support to decompress brotli compressed new data
Add a new writer that can decode the brotli-compressed system/vendor
new data stored in the OTA zip.
Brotli generally gives better compression rate at the cost of slightly
increased time consumption. The patch.dat is already compressed
by BZ; so there's no point to further compress it.
For the given 1.9G bullhead system image:
Size: 875M -> 787M; ~10% reduction of package size.
Time: 147s -> 153s; ~4% increase of the block_image_update execution time.
(I guess I/O takes much longer time than decompression.)
Also it takes 4 minutes to compress the system image on my local
machine, 3 more minutes than zip.
Test: recovery tests pass && apply a full OTA with brotli compressed
system/vendor.new.dat on bullhead
Change-Id: I232335ebf662a9c55579ca073ad45265700a621e
diff --git a/updater/Android.mk b/updater/Android.mk
index a113fe8..86dc48e 100644
--- a/updater/Android.mk
+++ b/updater/Android.mk
@@ -47,6 +47,7 @@
libcrypto_utils \
libcutils \
libtune2fs \
+ libbrotli \
$(tune2fs_static_libraries)
# libupdater (static library)