1 files changed, 282 insertions, 0 deletions
diff --git a/src/asicam/mod.rs b/src/asicam/mod.rs
new file mode 100644
index 0000000..01b9ce7
--- /dev/null
+++ b/src/asicam/mod.rs
@@ -0,0 +1,282 @@
+pub mod ASICamera2;
+
+use self::ASICamera2::{CameraInfo, ControlCaps, ControlType, ExposureStatus, ImageType};
+
+use std::alloc::{alloc, dealloc, Layout};
+use std::collections::HashMap;
+use std::ffi::CStr;
+use std::os;
+use std::fs::File;
+use std::io::BufWriter;
+use std::path::Path;
+
+use png::HasParameters;
+
+#[derive(Debug)]
+pub struct Control {
+    pub name: String,
+    pub description: String,
+    pub max: i64,
+    pub min: i64,
+    pub default: i64,
+    pub can_auto: bool,
+    pub is_writable: bool,
+    pub control_type: ASICamera2::ControlType
+}
+
+#[derive(Debug)]
+pub struct Camera {
+    id: i32,
+    pub width: u32,
+    pub height: u32,
+    curr_width: u32,
+    curr_height: u32,
+    bin: u8,
+    color_format: ASICamera2::ImageType,
+    image_buffer: *mut u8,
+    controls: HashMap<ASICamera2::ControlType, Control>
+}
+
+impl Camera {
+    pub fn new(id: i32) -> Camera {
+        Camera {
+            id: id,
+            controls: HashMap::new(),
+            width: 0,
+            height: 0,
+            curr_width: 0,
+            curr_height: 0,
+            bin: 1,
+            image_buffer: std::ptr::null_mut(),
+            color_format: ASICamera2::ImageType::END
+        }
+    }
+
+    pub fn get_control_value(&self, control: ASICamera2::ControlType) -> Result<i64> {
+        let mut current: os::raw::c_long = 0;
+        let mut is_auto: os::raw::c_int = 0;
+        let res =
+            unsafe {
+                ASICamera2::ASIGetControlValue(
+                    self.id,
+                    control as i32,
+                    &mut current as *mut os::raw::c_long,
+                    &mut is_auto as *mut os::raw::c_int
+                )
+            };
+        build_result(current, res)
+    }
+
+    pub fn set_control_value(&mut self, control: ASICamera2::ControlType, value: i64) -> Result<()> {
+        let res =
+            unsafe {
+                ASICamera2::ASISetControlValue(
+                    self.id,
+                    control as i32,
+                    value,
+                    0
+                )
+            };
+        build_result((), res)?;
+        match control {
+            ControlType::HardwareBin => {
+                if value == 0 {
+                    self.curr_width *= 2;
+                    self.curr_height *= 2;
+                    Ok(())
+                } else if value == 1 {
+                    self.curr_width /= 2;
+                    self.curr_height /= 2;
+                    Ok(())
+                } else {
+                    // pretty sure this is unreachable,
+                    // would be an out of band value and fail in `build_result`
+                    unreachable!();
+                }
+            }
+            _ => Ok(())
+        }
+    }
+
+    pub fn set_exposure_ms(&mut self, ms: u64) -> Result<()> {
+        self.set_control_value(ControlType::Exposure, ms as i64 * 1000)
+    }
+
+    pub fn take_image(&self, path: &str) -> Result<()> {
+        let exposure_duration = self.get_control_value(ControlType::Exposure).unwrap();
+        let exposure_ms = exposure_duration / 1000;
+        unsafe {
+            let res = ASICamera2::ASIStartExposure(self.id, 0); // isDark == false, doesnt matter really
+            build_result((), res)?;
+        }
+
+        println!("Sleeping {}ms", exposure_ms + 2500);
+        std::thread::sleep(std::time::Duration::from_millis(exposure_ms as u64 + 2500));
+
+        let res = unsafe {
+            ASICamera2::ASIGetDataAfterExp(
+                self.id,
+                self.image_buffer,
+                self.curr_width as i64 * self.curr_height as i64 * 3
+            )
+        };
+        build_result((), res)?;
+
+        let dest = Path::new(path);
+        let file = File::create(dest).unwrap();
+        let ref mut w = BufWriter::new(file);
+        let mut encoder = png::Encoder::new(w, self.curr_width, self.curr_height);
+        encoder.set(png::ColorType::RGB).set(png::BitDepth::Eight);
+        let mut writer = encoder.write_header().unwrap();
+        writer.write_image_data(
+            unsafe {
+                std::slice::from_raw_parts(
+                    self.image_buffer,
+                    self.curr_width as usize * self.curr_height as usize* 3
+                )
+            }
+        ).unwrap();
+        Ok(())
+    }
+
+    pub fn exposure_status(&self) -> Result<ExposureStatus> {
+        let mut exposure_status = ExposureStatus::Failed;
+        let res = unsafe {
+            ASICamera2::ASIGetExpStatus(self.id, &mut exposure_status as *mut ExposureStatus)
+        };
+        build_result(exposure_status, res)
+    }
+
+    pub fn set_roi_format(&mut self, width: u32, height: u32, binning: u8, image_type: ImageType) -> Result<()> {
+        self.curr_width = width - (width % 8);
+        self.curr_height = height - (height % 8);
+        self.bin = binning;
+        let res = unsafe {
+            ASICamera2::ASISetROIFormat(
+                self.id,
+                self.curr_width as i32,
+                self.curr_height as i32,
+                self.bin as i32,
+                image_type as i32)
+        };
+        build_result((), res)
+    }
+}
+
+#[derive(Copy, Clone, Debug)]
+pub enum CameraError {
+    InvalidIndex = 1,
+    InvalidId = 2,
+    InvalidControlType = 3,
+    CameraClosed = 4,
+    CameraRemoved = 5,
+    InvalidPath = 6,
+    InvalidFileformat = 7,
+    InvalidSize = 8,
+    InvalidImgtype = 9,
+    OutofBoundary = 10,
+    Timeout = 11,
+    InvalidSequence = 12,
+    BufferTooSmall = 13,
+    VideoModeActive = 14,
+    ExposureInProgress = 15,
+    GeneralError = 16,
+    InvalidMode = 17,
+    End = 18
+}
+
+fn build_result<T>(value: T, err: ASICamera2::ErrorCode) -> Result<T> {
+    match err {
+        ASICamera2::ErrorCode::Success => { Ok(value) }
+        ASICamera2::ErrorCode::InvalidIndex => { Err(CameraError::InvalidIndex) }
+        ASICamera2::ErrorCode::InvalidId => { Err(CameraError::InvalidId) }
+        ASICamera2::ErrorCode::InvalidControlType => { Err(CameraError::InvalidControlType) }
+        ASICamera2::ErrorCode::CameraClosed => { Err(CameraError::CameraClosed) }
+        ASICamera2::ErrorCode::CameraRemoved => { Err(CameraError::CameraRemoved) }
+        ASICamera2::ErrorCode::InvalidPath => { Err(CameraError::InvalidPath) }
+        ASICamera2::ErrorCode::InvalidFileformat => { Err(CameraError::InvalidFileformat) }
+        ASICamera2::ErrorCode::InvalidSize => { Err(CameraError::InvalidSize) }
+        ASICamera2::ErrorCode::InvalidImgtype => { Err(CameraError::InvalidImgtype) }
+        ASICamera2::ErrorCode::OutofBoundary => { Err(CameraError::OutofBoundary) }
+        ASICamera2::ErrorCode::Timeout => { Err(CameraError::Timeout) }
+        ASICamera2::ErrorCode::InvalidSequence => { Err(CameraError::InvalidSequence) }
+        ASICamera2::ErrorCode::BufferTooSmall => { Err(CameraError::BufferTooSmall) }
+        ASICamera2::ErrorCode::VideoModeActive => { Err(CameraError::VideoModeActive) }
+        ASICamera2::ErrorCode::ExposureInProgress => { Err(CameraError::ExposureInProgress) }
+        ASICamera2::ErrorCode::GeneralError => { Err(CameraError::GeneralError) }
+        ASICamera2::ErrorCode::InvalidMode => { Err(CameraError::InvalidMode) }
+        ASICamera2::ErrorCode::End => { Err(CameraError::End) }
+    }
+}
+
+type Result<T> = std::result::Result<T, CameraError>;
+
+pub fn acquire(camera_id: i32) -> Result<Camera> {
+    unsafe {
+        let cameracount = ASICamera2::ASIGetNumOfConnectedCameras();
+        if camera_id >= cameracount {
+            panic!("Camera id is invalid (detected {} cameras)", camera_id);
+        }
+        let props_layout = Layout::array::<CameraInfo>(cameracount as usize).unwrap();
+        let props = alloc(props_layout) as *mut CameraInfo;
+        let res = ASICamera2::ASIGetCameraProperty(props, camera_id);
+        build_result((), res)?;
+        println!("Got properties");
+
+        let res = ASICamera2::ASIOpenCamera(camera_id);
+        build_result((), res)?;
+        println!("Opened camera");
+
+        let res = ASICamera2::ASIInitCamera(camera_id);
+        build_result((), res)?;
+        println!("Init'd camera");
+
+        let mut control_count: i32 = 0;
+        let res = ASICamera2::ASIGetNumOfControls(camera_id, &mut control_count as *mut os::raw::c_int);
+        build_result((), res)?;
+        println!("Got control count");
+
+        let control_layout = Layout::array::<ControlCaps>(1).unwrap();
+        let control = alloc(control_layout) as *mut ControlCaps;
+
+        let mut camera = Camera::new(camera_id);
+
+        let camera_props: CameraInfo = *props.offset(camera_id as isize);
+        camera.width = camera_props.max_width as u32;
+        camera.height = camera_props.max_height as u32;
+        camera.curr_width = camera_props.max_width as u32;
+        camera.curr_height = camera_props.max_height as u32;
+        camera.color_format = ImageType::RGB24;
+        camera.image_buffer = alloc(
+            Layout::from_size_align(camera.curr_width as usize * camera.curr_height as usize * 3, 8).unwrap()
+        );
+
+        let res = ASICamera2::ASISetROIFormat(camera_id, camera.width as i32, camera.height as i32, 1, ImageType::RGB24 as i32);
+        build_result((), res)?;
+        println!("Set ROI/Format");
+
+        for c in 0..control_count {
+            let res = ASICamera2::ASIGetControlCaps(0, c, control);
+            build_result((),  res)?;
+            println!("Got control {:?}", c);
+
+            let control = Control {
+                name: CStr::from_ptr((*control).name.as_ptr()).to_str().unwrap().to_owned(),
+                description: CStr::from_ptr((*control).description.as_ptr()).to_str().unwrap().to_owned(),
+                max: (*control).max_value,
+                min: (*control).min_value,
+                default: (*control).default_value,
+                can_auto: bool::from((*control).is_auto_supported),
+                is_writable: bool::from((*control).is_writable),
+                control_type: (*control).control_type
+            };
+
+            camera.controls.insert(control.control_type, control);
+        }
+
+        dealloc(control as *mut u8, control_layout);
+        dealloc(props as *mut u8, props_layout);
+
+        Ok(camera)
+    }
+}