openjpeg/src/lib/openjp2/t1.c, branch v2.3.0 Fork of openjpeg library for JPEG2000 encoding and decoding https://git.carlh.net/cgit/openjpeg/atom?h=v2.3.0 2017-09-21T12:10:49Z Workaround Coverity CID 169392 2017-09-21T12:10:49Z Even Rouault even.rouault@spatialys.com 2017-09-21T12:10:49Z urn:sha1:7711307d865d46ca1bb8bb152071178b10066d05 Avoid relying on operator precedence (raised by cppcheck) 2017-09-19T16:35:52Z Even Rouault even.rouault@spatialys.com 2017-09-19T16:35:52Z urn:sha1:8df07d5866c9e3517bf04a7abee4a07a04735df4 Fix warnings and errors when compiling with a c++ compiler (#1021) 2017-09-19T10:46:20Z Even Rouault even.rouault@spatialys.com 2017-09-19T10:46:20Z urn:sha1:fdef69b43ce5222ac0f2a87f2fad1442ece340e8 Replace uses of size_t by OPJ_SIZE_T 2017-09-04T15:35:52Z Even Rouault even.rouault@spatialys.com 2017-09-04T15:35:52Z urn:sha1:579b8937eae7e6b6868b8b5c6286a742c10a5130 opj_t1_clbl_decode_processor(): use SSE2 in subtile decoding code path, for irreversible 2017-09-01T20:23:29Z Even Rouault even.rouault@spatialys.com 2017-09-01T19:17:26Z urn:sha1:4c7effa6bc37beb2a8e2f29ecf5845cde93f6b88 opj_t1_decode_cblk(): move some code to codeblock processor for (theoretical) better multi-threading in subtile decoding 2017-09-01T20:23:29Z Even Rouault even.rouault@spatialys.com 2017-09-01T14:31:13Z urn:sha1:559d16e8f43a0cd090d217d7d111820989299b85 Tiny perf improvement in T1 stage for subtile decoding 2017-09-01T14:30:58Z Even Rouault even.rouault@spatialys.com 2017-09-01T14:30:58Z urn:sha1:ccac773556070ede24ea3dfbdec47c2b3c5be5c4 Allow several repeated calls to opj_set_decode_area() and opj_decode() for single-tiled images 2017-09-01T14:30:48Z Even Rouault even.rouault@spatialys.com 2017-09-01T14:30:48Z urn:sha1:0ae3cba3404674bbe2028ea9a801301a4c951b33 * Only works for single-tiled images --> will error out cleanly, as currently in other cases * Save re-reading the codestream for the tile, and re-use code-blocks of the previous decoding pass. * Future improvements might involve improving opj_decompress, and the image writing logic, to use this strategy. Various changes to allow tile buffers of more than 4giga pixels 2017-09-01T14:30:44Z Even Rouault even.rouault@spatialys.com 2017-09-01T14:30:44Z urn:sha1:98b93103613c90753fb6c57696f9403f8ea0b1d6 Untested though, since that means a tile buffer of at least 16 GB. So there might be places where uint32 overflow on multiplication still occur... 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.