openjpeg/src/lib/openjp2/j2k.h, branch v2.3.0

Merge pull request #1022 from rouault/partial_component_decoding

2017-09-26T21:30:20Z

Add capability to decode only a subset of all components of an image.

Use a #define J2K_MAX_POCS 32 to avoid hard-coded constant (#349)

2017-09-19T22:55:22Z

Add capability to decode only a subset of all components of an image.

2017-09-19T15:06:19Z

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.

Use const qualifier for j2k_prog_order_list

2017-08-14T12:41:27Z

This allows more compiler optimizations. Signed-off-by: Stefan Weil

Partial revert BPC related check of #975 (#979)

2017-08-09T09:34:08Z

PR #975 introduced a check that rejects images that have different bit depth/sign per compoment in SIZ marker if the JP2 IHDR box has BPC != 255 This didn't work properly if decoding a .j2k file since the new bit added in opj_cp_t wasn't initialized to the right value. For clarity, tThis new bit has also been renamed to allow_different_bit_depth_sign But looking closer at the code, it seems we were already tolerant to inconsistencies. For example we parsed a JP2 BPCC box even if BPC != 255 (just a warning is emitted) So failing hard in opj_j2k_read_siz() wouldn't be very inconsistent, and that alone cannot protect against other issues, so just emit a warning if BPC != 255 and the SIZ marker contains different bit depth/sign per component. Note: we could also check that the content of JP2 BPCC box is consistant with the one of the SIZ marker.

First change on changes-for-afl-tests

2017-08-02T15:27:08Z

Catch images broken by AFL

2017-07-31T11:58:08Z

src/lib/openjp2/*.h: use OPJ_ prefix for inclusion guards instead of reserved __ (#587)

2017-07-30T17:46:52Z

j2k.c: remove hardcoded constants related to m_state, and useless FIXME

2017-07-30T15:26:03Z

Spelling fixes (patch by ka7, #890, rebased on top of master)

2017-07-26T19:06:38Z