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Makes all colour components involved in colour transform employ the s… #163

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merged 2 commits into from
Dec 13, 2024
Merged

Makes all colour components involved in colour transform employ the s… #163

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4a3958f
Makes all colour components involved in colour transform employ the s…
aous72 Dec 13, 2024
23633ba
Fixes warning.
aous72 Dec 13, 2024
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23 changes: 15 additions & 8 deletions src/core/codestream/ojph_params.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -780,19 +780,26 @@ namespace ojph {
ui32
param_cod::propose_precision(const param_siz* siz, ui32 comp_num) const
{
bool employing_color_transform = is_employing_color_transform() ? 1 : 0;
bool reversible = atk->is_reversible();
if (atk->is_reversible() == false)
return 32;
else
{
ui32 bit_depth = 0;
if (comp_num < 3 && is_employing_color_transform())
{
for (ui32 c = 0; c < 3; ++c)
bit_depth = ojph_max(bit_depth, siz->get_bit_depth(c));
++bit_depth; // colour transform needs one extra bit
}
else
bit_depth = siz->get_bit_depth(comp_num);

ui32 bit_depth = 32;
if (reversible) {
bit_depth = siz->get_bit_depth(comp_num);
bit_depth += comp_num < 3 ? employing_color_transform : 0;
// 3 or 4 is how many extra bits are needed for the HH band at the
// bottom most level of decomposition.
bit_depth += get_num_decompositions() > 5 ? 4 : 3;
}

return bit_depth;
return bit_depth;
}
}

//////////////////////////////////////////////////////////////////////////
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