<div dir="ltr">Hi Jason,<div><br></div><div>I've seen the same thing with an alpha channel. I'm not sure what's up. Using just RGB was successful.<div><br></div><div>On 7.3, I'm also seeing problems when using more than the main thread on linux. </div><div><br></div><div>With 7.3, I just noticed today that kdu_get_num_processors() only returns 0 on linux as kdu_arch.cpp is missing #include <unistd.h> so _SC_NPROCESSORS_ONLN and _SC_NPROCESSORS_CONF are undefined. When I enabled _SC_NPROCESSORS_ONLN, I got kdu_get_num_processors() returning 74 on what I thought was a 6 core (aka 12 hyperthread) box. If I change the fall through from 0 to 2, I get all sorts of trouble from internal kakadu assertions and TSAN failures.</div><div><br></div><div>So I clearly have more investigating to do.<br></div><div><br></div><div>I've yet to pass along any of what I've found to Taubman and I haven't yet pushed any of my new tests to github, but I hope to do both soon.</div></div><div><br></div><div>And I've yet to see what, if any, discussion is happening in the yahoo group.</div><div><br></div><div>-kurt</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Mon, Feb 13, 2017 at 8:14 PM, jason.liu <span dir="ltr"><<a href="mailto:jason.liu@spookfish.com" target="_blank">jason.liu@spookfish.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi gdal-dev,<br>
<br>
I am having trouble using GDAL to write 4-band RGBA jp2 file with Kakadu<br>
7.8. The following minimal code<br>
<br>
<br>
GDALAllRegister();<br>
<br>
GDALDataset* srcDataset =<br>
(GDALDataset*)GDALOpen("/home/<wbr>jason.liu/00000783.tif", GA_ReadOnly);<br>
char **papszOptions = NULL;<br>
papszOptions = CSLSetNameValue( papszOptions, "QUALITY", "20" );<br>
<br>
GDALDriver *driver = GetGDALDriverManager()-><wbr>GetDriverByName("JP2KAK");<br>
GDALDataset* destDataset =<br>
driver->CreateCopy("/home/<wbr>jason.liu/00000783.jp2",<br>
srcDataset,<br>
FALSE,<br>
papszOptions,<br>
NULL,<br>
NULL);<br>
<br>
if( destDataset != NULL ) {<br>
GDALClose( (GDALDatasetH) destDataset );<br>
}<br>
GDALClose( (GDALDatasetH) srcDataset );<br>
CSLDestroy(papszOptions);<br>
<br>
<br>
crashes Kakadu 7.8 with the following message in stderr:<br>
<br>
ERROR 1: Error in Kakadu File Format Support:<br>
Attempting to create a Component Mapping (cmap) box, one of whose channels<br>
refers to a non-existent image component or palette lookup table.<br>
terminate called after throwing an instance of<br>
'kdu_cpl_error_message::<wbr>JP2KAKException'<br>
<br>
<br>
where /home/jason.liu/00000783.tif is a 4-band 16-bit RGBA tif.<br>
<br>
<br>
I have also done the following tests and noted the results:<br>
<br>
3-band 8-bit RGB tif OK<br>
3-band 16-bit RGB tif OK<br>
4-band 8-bit RGBA tif error as above<br>
4-band 16-bit RGBA tif error as above<br>
<br>
<br>
Am I doing anything wrong here?<br>
<br>
By the way, I am quite certain Kakadu 7.8 supports 4-band RGBA as I can use<br>
their example kdu_compress to produce 4-band RGBA jp2 images. So this looks<br>
to be a problem with GDAL, or the way I am invoking it.<br>
<br>
<br>
Any insights will be greatly appreciated.<br>
<br>
Kind Regards<br>
Jason<br>
<br>
<br>
<br>
<br>
--<br>
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