openjpeg/src/lib/openjp2/tcd.c, branch v2.5.0 Fork of openjpeg library for JPEG2000 encoding and decoding https://git.carlh.net/cgit/openjpeg/atom?h=v2.5.0 2020-12-04T11:00:22Z Encoder: grow again buffer size in opj_tcd_code_block_enc_allocate_data() (fixes #1283) 2020-12-04T11:00:22Z yuan zodf0055980@gmail.com 2020-12-04T11:00:22Z urn:sha1:4ce7d285a55d29b79880d0566d4b010fe1907aa9 Free p_tcd_marker_info to avoid memory leak 2020-11-25T16:22:49Z yuan zodf0055980@gmail.com 2020-11-25T16:22:49Z urn:sha1:4f487798bac3eea5ffa07d3cc542f675c4b4d9ae Encoder: grow again buffer size in opj_tcd_code_block_enc_allocate_data() (fixes #1283) 2020-11-25T12:41:39Z yuan zodf0055980@gmail.com 2020-11-25T12:41:39Z urn:sha1:649298dcf84b2f20cfe458d887c1591db47372a6 Encoder: grow again buffer size in opj_tcd_code_block_enc_allocate_data() (fixes #1283) 2020-11-23T17:14:02Z Even Rouault even.rouault@spatialys.com 2020-11-23T17:14:02Z urn:sha1:15cf3d95814dc931ca0ecb132f81cb152e051bae Encoder: grow buffer size in opj_tcd_code_block_enc_allocate_data() to avoid write heap buffer overflow in opj_mqc_flush (fixes #1283) 2020-11-23T12:49:05Z Even Rouault even.rouault@spatialys.com 2020-11-23T12:49:05Z urn:sha1:eaa098b59b346cb88e4d10d505061f669d7134fc Irreversible decoding: partially revert previous commit, to fix failures in test suite 2020-05-20T18:31:28Z Even Rouault even.rouault@spatialys.com 2020-05-20T17:24:09Z urn:sha1:adccbc8336ce5c46ca7de85ac364d9c992d337c7 Irreversible compression/decompression DWT: use 1/K constant as per standard 2020-05-20T18:31:28Z Even Rouault even.rouault@spatialys.com 2020-05-20T16:00:45Z urn:sha1:3cd1305596f191a01afdc11f9355f9c6590065dd The previous constant opj_c13318 was mysteriously equal to 2/K , and in the DWT, we had to divide K and opj_c13318 by 2... The issue was that the band->stepsize computation in tcd.c didn't take into account the log2gain of the band. The effect of this change is expected to be mostly equivalent to the previous situation, except some difference in rounding. But it leads to a dramatic reduction of the mean square error and peak error in the irreversible encoding of issue141.tif ! Irreversible decoding: align code more closely to the standard by avoid messing up with stepsize (no functional change) 2020-05-20T18:31:28Z Even Rouault even.rouault@spatialys.com 2020-05-20T11:14:16Z urn:sha1:f38c069547f1c41dc94ec4a273efb07997685c21 tcd.c: add comment 2020-05-20T18:31:28Z Even Rouault even.rouault@spatialys.com 2020-05-18T18:17:07Z urn:sha1:3d35d0f3af46ee206a3ea147298aad3d83a7775c Encoder: use floating-point operations for irreversible transformation 2020-05-20T18:31:28Z Even Rouault even.rouault@spatialys.com 2020-05-18T18:15:07Z urn:sha1:00cff6f5c02deabb64ccb15f15c13fcb773968fe