nitf::FileSource::FileSource(nitf::IOHandle & io,
nitf::Off start,
int numBytesPerPixel,
int pixelSkip) throw(nitf::NITFException)
{
setNative(nitf_IOSource_construct(io.getNative(), start, numBytesPerPixel, pixelSkip, &error));
setManaged(false);
io.setManaged(true); //TODO must release this on destruction
}
NITFAPI(nitf_BandSource *) nitf_FileSource_constructFile(const char* fname,
nitf_Off start,
int numBytesPerPixel,
int pixelSkip,
nitf_Error* error)
{
/* We need a way to free 'interface' when we destruct - the IOSource
* doesn't take ownership of it.
*/
static nitf_IDataSource iFileSource =
{
&IOSource_read,
&FileSource_destruct,
&IOSource_getSize,
&IOSource_setSize
};
nitf_IOInterface* interface = NULL;
nitf_BandSource* bandSource = NULL;
interface = nitf_IOHandleAdapter_open(fname, NRT_ACCESS_READONLY,
NRT_OPEN_EXISTING, error);
if (interface == NULL)
{
return NULL;
}
bandSource = nitf_IOSource_construct(interface, start, numBytesPerPixel,
pixelSkip, error);
if (bandSource == NULL)
{
return NULL;
}
bandSource->iface = &iFileSource;
return bandSource;
}