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| author | Even Rouault <even.rouault@spatialys.com> | 2017-12-21 13:32:02 +0100 |
|---|---|---|
| committer | Even Rouault <even.rouault@spatialys.com> | 2017-12-21 13:32:02 +0100 |
| commit | 62b9df5d2af68262fa6fcfb66086bf128f7d67c3 (patch) | |
| tree | 92e37acfbaad84520c6b89e9479653820511d3ea /libtiff/CMakeLists.txt | |
| parent | 5848777bd7e4f465681a7c4d0acf96a1dbd5b75c (diff) | |
| download | libtiff-git-62b9df5d2af68262fa6fcfb66086bf128f7d67c3.tar.gz | |
Add ZSTD compression codec
From https://github.com/facebook/zstd
"Zstandard, or zstd as short version, is a fast lossless compression
algorithm, targeting real-time compression scenarios at zlib-level
and better compression ratios. It's backed by a very fast entropy stage,
provided by Huff0 and FSE library."
We require libzstd >= 1.0.0 so as to be able to use streaming compression
and decompression methods.
The default compression level we have selected is 9 (range goes from 1 to 22),
which experimentally offers equivalent or better compression ratio than
the default deflate/ZIP level of 6, and much faster compression.
For example on a 6600x4400 16bit image, tiffcp -c zip runs in 10.7 seconds,
while tiffcp -c zstd runs in 5.3 seconds. Decompression time for zip is
840 ms, and for zstd 650 ms. File size is 42735936 for zip, and
42586822 for zstd. Similar findings on other images.
On a 25894x16701 16bit image,
Compression time Decompression time File size
ZSTD 35 s 3.2 s 399 700 498
ZIP/Deflate 1m 20 s 4.9 s 419 622 336
Diffstat (limited to 'libtiff/CMakeLists.txt')
| -rw-r--r-- | libtiff/CMakeLists.txt | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/libtiff/CMakeLists.txt b/libtiff/CMakeLists.txt index 087dfa9e..34107efb 100644 --- a/libtiff/CMakeLists.txt +++ b/libtiff/CMakeLists.txt @@ -94,7 +94,8 @@ set(tiff_SOURCES tif_version.c tif_warning.c tif_write.c - tif_zip.c) + tif_zip.c + tif_zstd.c) set(tiffxx_HEADERS tiffio.hxx) |