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Subtile decoding: only apply IDWT on areas that participate to the window of interest #1001

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merged 7 commits into from
Aug 21, 2017
Merged

Subtile decoding: only apply IDWT on areas that participate to the window of interest #1001

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fe338a0
Sub-tile decoding: only decode precincts and codeblocks that intersec…
rouault Aug 14, 2017
4b0bfbf
Zero-initialize tile buffer regions of skipped code-blocks, so as to …
rouault Aug 17, 2017
5d12806
opj_j2k_update_rates(): grow tile size buffer for some situations
rouault Aug 17, 2017
028c504
test_decode_area: fix to make it work with odd image dimensions
rouault Aug 18, 2017
5d40325
Subtile decoding: only do 5x3 IDWT computations on relevant areas of …
rouault Aug 18, 2017
f87c5ef
Subtile decoding: only do 9x7 IDWT computations on relevant areas of …
rouault Aug 20, 2017
17a7ac4
Add comments for filter_width values
rouault Aug 21, 2017
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opj_j2k_update_rates(): grow tile size buffer for some situations
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@rouault
rouault committed Aug 17, 2017
commit 5d12806091eab0659431fefcefdb797b09f8e884
4 changes: 4 additions & 0 deletions src/lib/openjp2/j2k.c
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Expand Up @@ -5171,6 +5171,10 @@ static OPJ_BOOL opj_j2k_update_rates(opj_j2k_t *p_j2k,
/* number of packets and number of code blocks in packets */
l_tile_size = (OPJ_UINT32)(l_tile_size * 1.4 / 8);

/* Arbitrary amount to make the following work: */
/* bin/test_tile_encoder 1 256 256 17 16 8 0 reversible_no_precinct.j2k 4 4 3 0 0 1 */
l_tile_size += 500;

l_tile_size += opj_j2k_get_specific_header_sizes(p_j2k);

p_j2k->m_specific_param.m_encoder.m_encoded_tile_size = l_tile_size;
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