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; }