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use std::borrow::Cow;
use std::ffi::CStr;
use std::mem;
use ::context::Context;
use ::abilities::Abilities;
use ::media::Media;
use ::port::Port;
use ::storage::Storage;
use ::handle::prelude::*;
/// A structure representing a camera connected to the system.
pub struct Camera {
camera: *mut ::gphoto2::Camera,
}
impl Drop for Camera {
fn drop(&mut self) {
unsafe {
::gphoto2::gp_camera_unref(self.camera);
}
}
}
impl Camera {
/// Opens the first detected camera.
pub fn autodetect(context: &mut Context) -> ::Result<Self> {
let mut ptr = unsafe { mem::uninitialized() };
try_unsafe!(::gphoto2::gp_camera_new(&mut ptr));
let camera = Camera { camera: ptr };
try_unsafe!(::gphoto2::gp_camera_init(camera.camera, context.as_mut_ptr()));
Ok(camera)
}
/// Captures an image.
pub fn capture_image(&mut self, context: &mut Context) -> ::Result<CameraFile> {
let mut file_path = unsafe { mem::uninitialized() };
try_unsafe! {
::gphoto2::gp_camera_capture(self.camera,
::gphoto2::GP_CAPTURE_IMAGE,
&mut file_path,
context.as_mut_ptr())
};
Ok(CameraFile { inner: file_path })
}
/// Downloads a file from the camera.
pub fn download<T: Media>(&mut self, context: &mut Context, source: &CameraFile, destination: &mut T) -> ::Result<()> {
try_unsafe! {
::gphoto2::gp_camera_file_get(self.camera,
source.inner.folder.as_ptr(),
source.inner.name.as_ptr(),
::gphoto2::GP_FILE_TYPE_NORMAL,
destination.as_mut_ptr(),
context.as_mut_ptr())
};
Ok(())
}
/// Returns information about the port the camera is connected to.
pub fn port<'a>(&'a self) -> Port<'a> {
let mut ptr = unsafe { mem::uninitialized() };
unsafe {
assert_eq!(::gphoto2::GP_OK, ::gphoto2::gp_camera_get_port_info(self.camera, &mut ptr));
}
::port::from_libgphoto2(self, ptr)
}
/// Retrieves the camera's abilities.
pub fn abilities(&self) -> Abilities {
let mut abilities = unsafe { mem::uninitialized() };
unsafe {
assert_eq!(::gphoto2::GP_OK, ::gphoto2::gp_camera_get_abilities(self.camera, &mut abilities));
}
::abilities::from_libgphoto2(abilities)
}
/// Retrieves information about the camera's storage.
///
/// Returns a `Vec` containing one `Storage` for each filesystem on the device.
pub fn storage(&mut self, context: &mut Context) -> ::Result<Vec<Storage>> {
let mut ptr = unsafe { mem::uninitialized() };
let mut len = unsafe { mem::uninitialized() };
try_unsafe! {
::gphoto2::gp_camera_get_storageinfo(self.camera,
&mut ptr,
&mut len,
context.as_mut_ptr())
};
let storage = ptr as *mut Storage;
let length = len as usize;
Ok(unsafe { Vec::from_raw_parts(storage, length, length) })
}
/// Returns the camera's summary.
///
/// The summary typically contains non-configurable information about the camera, such as
/// manufacturer and number of pictures taken.
///
/// ## Errors
///
/// This function returns an error if the summary could not be retrieved:
///
/// * `NotSupported` if there is no summary available for the camera.
/// * `CorruptedData` if the summary is invalid UTF-8.
pub fn summary(&mut self, context: &mut Context) -> ::Result<String> {
let mut summary = unsafe { mem::uninitialized() };
try_unsafe!(::gphoto2::gp_camera_get_summary(self.camera, &mut summary, context.as_mut_ptr()));
util::camera_text_to_string(summary)
}
/// Returns the camera's manual.
///
/// The manual contains information about using the camera.
///
/// ## Errors
///
/// This function returns an error if the manual could not be retrieved:
///
/// * `NotSupported` if there is no manual available for the camera.
/// * `CorruptedData` if the summary is invalid UTF-8.
pub fn manual(&mut self, context: &mut Context) -> ::Result<String> {
let mut manual = unsafe { mem::uninitialized() };
try_unsafe!(::gphoto2::gp_camera_get_manual(self.camera, &mut manual, context.as_mut_ptr()));
util::camera_text_to_string(manual)
}
/// Returns information about the camera driver.
///
/// This text typically contains information about the driver's author, acknowledgements, etc.
///
/// ## Errors
///
/// This function returns an error if the about text could not be retrieved:
///
/// * `NotSupported` if there is no about text available for the camera's driver.
/// * `CorruptedData` if the summary is invalid UTF-8.
pub fn about_driver(&mut self, context: &mut Context) -> ::Result<String> {
let mut about = unsafe { mem::uninitialized() };
try_unsafe!(::gphoto2::gp_camera_get_about(self.camera, &mut about, context.as_mut_ptr()));
util::camera_text_to_string(about)
}
}
/// A file stored on a camera's storage.
pub struct CameraFile {
inner: ::gphoto2::CameraFilePath,
}
impl CameraFile {
/// Returns the directory that the file is stored in.
pub fn directory(&self) -> Cow<str> {
unsafe {
String::from_utf8_lossy(CStr::from_ptr(self.inner.folder.as_ptr()).to_bytes())
}
}
/// Returns the name of the file without the directory.
pub fn basename(&self) -> Cow<str> {
unsafe {
String::from_utf8_lossy(CStr::from_ptr(self.inner.name.as_ptr()).to_bytes())
}
}
}
mod util {
use std::ffi::CStr;
pub fn camera_text_to_string(mut camera_text: ::gphoto2::CameraText) -> ::Result<String> {
let length = unsafe {
CStr::from_ptr(camera_text.text.as_ptr()).to_bytes().len()
};
let vec = unsafe {
Vec::<u8>::from_raw_parts(camera_text.text.as_mut_ptr() as *mut u8, length, camera_text.text.len())
};
String::from_utf8(vec).map_err(|_| {
::error::from_libgphoto2(::gphoto2::GP_ERROR_CORRUPTED_DATA)
})
}
}