Пример #1
0
func (c *Camera) FileReader(folder string, fileName string) io.ReadCloser {
	cfr := new(cameraFileReader)
	cfr.camera = c
	cfr.folder = folder
	cfr.fileName = fileName
	cfr.offset = 0
	cfr.closed = false

	cFileName := C.CString(cfr.fileName)
	cFolderName := C.CString(cfr.folder)
	defer C.free(unsafe.Pointer(cFileName))
	defer C.free(unsafe.Pointer(cFolderName))

	C.gp_file_new(&cfr.cCameraFile)
	C.gp_camera_file_get(c.camera, cFolderName, cFileName, C.GP_FILE_TYPE_NORMAL, cfr.cCameraFile, c.context)

	var cSize C.ulong
	C.gp_file_get_data_and_size(cfr.cCameraFile, &cfr.cBuffer, &cSize)

	cfr.fullSize = uint64(cSize)

	return cfr
}
Пример #2
0
//DownloadImage saves image pointed by path to the provided buffer. If leave on camera is set to false,the file will be deleted from the camera internal storage
func (file *CameraFilePath) DownloadImage(buffer io.Writer, leaveOnCamera bool) error {
	gpFile, err := newGpFile()
	if err != nil {
		return err
	}
	defer C.gp_file_free(gpFile)

	fileDir := C.CString(file.Folder)
	defer C.free(unsafe.Pointer(fileDir))

	fileName := C.CString(file.Name)
	defer C.free(unsafe.Pointer(fileName))

	if retval := C.gp_camera_file_get(file.camera.gpCamera, fileDir, fileName, FileTypeNormal, gpFile, file.camera.gpContext); retval != gpOk {
		return fmt.Errorf("Cannot download photo file, error code :%v", retval)
	}

	err = getFileBytes(gpFile, buffer)
	if err != nil && leaveOnCamera == false {
		C.gp_camera_file_delete(file.camera.gpCamera, fileDir, fileName, file.camera.gpContext)
	}
	return err
}