openjpeg/src/lib/openjp2/test_sparse_array.c, branch master-cdist Fork of openjpeg library for JPEG2000 encoding and decoding https://git.carlh.net/cgit/openjpeg/atom?h=master-cdist 2017-09-01T14:30:50Z Optimize reading/write into sparse array 2017-09-01T14:30:50Z Even Rouault even.rouault@spatialys.com 2017-09-01T14:30:50Z urn:sha1:b2cc8f7f81242f967b65e76de043e5e31663d793 Fix compiler warning in release mode 2017-09-01T14:30:39Z Even Rouault even.rouault@spatialys.com 2017-09-01T14:30:39Z urn:sha1:d1299d9670d766006a7a162a770d3b70eaeef9bd Sub-tile decoding: only allocate tile component buffer of the needed dimension 2017-09-01T14:30:29Z Even Rouault even.rouault@spatialys.com 2017-09-01T14:30:29Z urn: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.