openjpeg/src/lib/openjp2/CMakeLists.txt, branch floating_point_irreversible_encodingFork of openjpeg library for JPEG2000 encoding and decodinghttps://git.carlh.net/cgit/openjpeg/atom?h=floating_point_irreversible_encoding2020-05-20T18:30:21ZAdd multithreaded support in the DWT encoder.2020-05-20T18:30:21ZEven Rouaulteven.rouault@spatialys.com2020-04-30T09:52:42Zurn:sha1:07d1f775a1ef95496b0c78b18f671dac41983320
Update the bench_dwt utility to have a -decode/-encode switch
Measured performance gains for DWT encoder on a
Intel(R) Core(TM) i7-6700HQ CPU @ 2.60GHz (4 cores, hyper threaded)
Encoding time:
$ ./bin/bench_dwt -encode -num_threads 1
time for dwt_encode: total = 8.348 s, wallclock = 8.352 s
$ ./bin/bench_dwt -encode -num_threads 2
time for dwt_encode: total = 9.776 s, wallclock = 4.904 s
$ ./bin/bench_dwt -encode -num_threads 4
time for dwt_encode: total = 13.188 s, wallclock = 3.310 s
$ ./bin/bench_dwt -encode -num_threads 8
time for dwt_encode: total = 30.024 s, wallclock = 4.064 s
Scaling is probably limited by memory access patterns causing
memory access to be the bottleneck.
The slightly worse results with threads==8 than with thread==4
is due to hyperthreading being not appropriate here.
Changed cmake version test to allow for cmake 2.8.11.x2017-11-14T10:45:09ZAndrew Murrayradarhere@users.noreply.github.com2017-11-14T10:45:09Zurn:sha1:157a3d840884abe5020b1a8b94576a7447063385Unix build: fix regression of 2.3.0 where a shared-only or static-only build lacks the installation target for the library (#1019, fixes regression introduced by 3dfc6ca2bcf06fd1adb6b6b4cecc6c092f08ba0b)2017-10-09T09:40:43ZEven Rouaulteven.rouault@spatialys.com2017-10-09T09:40:43Zurn:sha1:66297f07a43d2770a97c8456d20202f3d051d980Build: make sure that -DBUILD_SHARED_LIBS:bool=off is honoured to build only the static lib (#1019)2017-09-17T10:17:49ZEven Rouaulteven.rouault@spatialys.com2017-09-17T10:17:49Zurn:sha1:3dfc6ca2bcf06fd1adb6b6b4cecc6c092f08ba0bSub-tile decoding: only allocate tile component buffer of the needed dimension2017-09-01T14:30:29ZEven Rouaulteven.rouault@spatialys.com2017-09-01T14:30:29Zurn:sha1:f9e9942330f476b66ac4a35d0ae521200878f343
Instead of being the full tile size.
* Use a sparse array mechanism to store code-blocks and intermediate stages of
IDWT.
* IDWT, DC level shift and MCT stages are done just on that smaller array.
* Improve copy of tile component array to final image, by saving an intermediate
buffer.
* For full-tile decoding at reduced resolution, only allocate the tile buffer to
the reduced size, instead of the full-resolution size.
install static libraries2017-07-13T09:34:15ZJeroenjeroenooms@gmail.com2017-07-13T09:34:15Zurn:sha1:90ced71601f05e87b4fa922261554eeeb11118b9Merge pull request #954 from jeroen/static2017-07-03T10:03:29ZEven Rouaulteven.rouault@mines-paris.org2017-07-03T10:03:29Zurn:sha1:5736b1a3683261a5b31fc19a691731dc9fce5920
build both shared and static libraryAdd bench_dwt program (compiled only if BUILD_BENCH_DWT=ON)2017-06-20T15:56:19ZEven Rouaulteven.rouault@spatialys.com2017-06-20T15:56:19Zurn:sha1:919ed5f8b8681aeae54ce3884b3ecca56cadc2e0only build both static and dynamic on non-windows2017-06-16T11:58:25ZJeroen Oomsjeroenooms@gmail.com2017-06-16T11:58:25Zurn:sha1:a0839cca24e19f1f0906e30ee1009ce89e4942b4build both shared and static library2017-06-16T11:27:19ZJeroen Oomsjeroenooms@gmail.com2017-06-16T11:27:19Zurn:sha1:1329b3240aafb1b31328091eb6f7720787b391be