openjpeg/src/lib/openjp2/tcd.h, branch v2.3.0 Fork of openjpeg library for JPEG2000 encoding and decoding https://git.carlh.net/cgit/openjpeg/atom?h=v2.3.0 2017-09-19T15:06:19Z Add capability to decode only a subset of all components of an image. 2017-09-19T15:06:19Z Even Rouault even.rouault@spatialys.com 2017-09-19T14:52:07Z urn:sha1:7e2b6bebff12eab8bdc17fc9af017e8c11652f4f This adds a opj_set_decoded_components(opj_codec_t *p_codec, OPJ_UINT32 numcomps, const OPJ_UINT32* comps_indices) function, and equivalent "opj_decompress -c compno[,compno]*" option. When specified, neither the MCT transform nor JP2 channel transformations will be applied. Tests added for various combinations of whole image vs tiled-based decoding, full or reduced resolution, use of decode area or not. 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... TCD: allow tile buffer to be greater than 4GB on 64 bit hosts (but number of pixels must remain under 4 billion) 2017-09-01T14:30:41Z Even Rouault even.rouault@spatialys.com 2017-09-01T14:30:41Z urn:sha1:008a12d4fce0a7b1eabc51e04ed339be759646e2 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. Add comment 2017-08-21T15:19:13Z Even Rouault even.rouault@spatialys.com 2017-08-21T15:19:13Z urn:sha1:24d069e3ffa2286930a2e7e2638431ea1de6846a Sub-tile decoding: only decode precincts and codeblocks that intersect the window specified in opj_set_decode_area() 2017-08-17T17:05:54Z Even Rouault even.rouault@spatialys.com 2017-08-14T11:23:57Z urn:sha1:fe338a057c39797bf61939471ebaef09e44464c7 Propagate event manager down to opj_t2_encode_packet() and use it to emit an error message when the output buffer is too small 2017-08-10T14:49:47Z Even Rouault even.rouault@spatialys.com 2017-08-10T14:49:47Z urn:sha1:0b4fef6d1901254e41ab74ed681daba477d724c3 Remove useless opj_tcd_t::enumcs field added per #975 2017-08-09T15:37:05Z Even Rouault even.rouault@spatialys.com 2017-08-09T15:37:05Z urn:sha1:4b16e8d27ae524c5bf5f8af299703f7334752465 Doc: fix error in previous commit 2017-08-09T13:04:29Z Even Rouault even.rouault@spatialys.com 2017-08-09T13:04:29Z urn:sha1:5e200452db84947f4eb893ae7f02f7dd9a358378 tcd.h: doc fixes and improvements 2017-08-09T12:50:59Z Even Rouault even.rouault@spatialys.com 2017-08-09T12:50:59Z urn:sha1:9203e8ec51a1c1c1a358a9cbafdf3391549ebc80