private Memory toPointer(String input) {
byte[] data = Native.toByteArray(input);
Memory pointer = new Memory(data.length + 1);
pointer.write(0, data, 0, data.length);
pointer.setByte(data.length, (byte) 0);
return pointer;
}
/**
* Downloads an image and saves it somewhere.
*
* @param directoryItem The item you want to download
* @param destination A path in the filesystem where you want to save the file. Can also be null
* or a directory. In case of null the temp directory will be used, in case of a directory the
* file name of the item will be used.
* @param appendFileExtension Adds the extension of the photo onto File to ensure that supplied
* File name extension matches the image being downloaded from the camera. This is especially
* important if the camera is set to RAW+JPEG where the order of the images is not consistent.
* @return Either null, or the location the file was ultimately saved to on success.
*/
public static File download(
final EdsDirectoryItemRef directoryItem,
File destination,
final boolean appendFileExtension) {
EdsError err = EdsError.EDS_ERR_OK;
final EdsStreamRef.ByReference stream = new EdsStreamRef.ByReference();
final EdsDirectoryItemInfo dirItemInfo = new EdsDirectoryItemInfo();
boolean success = false;
// final long timeStart = System.currentTimeMillis();
try {
err =
CanonUtils.toEdsError(
CanonCamera.EDSDK.EdsGetDirectoryItemInfo(directoryItem, dirItemInfo));
if (err == EdsError.EDS_ERR_OK) {
if (destination == null) {
destination = new File(System.getProperty("java.io.tmpdir"));
}
if (destination.isDirectory()) {
destination = new File(destination, Native.toString(dirItemInfo.szFileName));
} else if (appendFileExtension) {
final String sourceFileName = Native.toString(dirItemInfo.szFileName);
final int i = sourceFileName.lastIndexOf(".");
if (i > 0) {
final String extension = sourceFileName.substring(i);
if (!destination.getName().toLowerCase().endsWith(extension)) {
destination = new File(destination.getPath() + extension);
}
}
}
if (destination.getParentFile() != null) {
destination.getParentFile().mkdirs();
}
/*
* System.out.println( "Downloading image " +
* Native.toString( dirItemInfo.szFileName ) +
* " to " + destination.getCanonicalPath() );
*/
// TODO: see if using an EdsCreateMemoryStream would be faster and whether the image could
// be read directly without saving to file first - see:
// http://stackoverflow.com/questions/1083446/canon-edsdk-memorystream-image
err =
CanonUtils.toEdsError(
CanonCamera.EDSDK.EdsCreateFileStream(
Native.toByteArray(destination.getCanonicalPath()),
EdsFileCreateDisposition.kEdsFileCreateDisposition_CreateAlways.value(),
EdsAccess.kEdsAccess_ReadWrite.value(),
stream));
}
if (err == EdsError.EDS_ERR_OK) {
err =
CanonUtils.toEdsError(
CanonCamera.EDSDK.EdsDownload(directoryItem, dirItemInfo.size, stream.getValue()));
}
if (err == EdsError.EDS_ERR_OK) {
/*
* System.out.println( "Image downloaded in " +
* ( System.currentTimeMillis() - timeStart ) +
* " ms" );
*/
err = CanonUtils.toEdsError(CanonCamera.EDSDK.EdsDownloadComplete(directoryItem));
success = true;
}
if (stream != null) {
CanonCamera.EDSDK.EdsRelease(stream.getValue());
}
} catch (final Exception e) {
e.printStackTrace();
}
return success ? destination : null;
}