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use crate::detections::Detections;
use crate::image::Image;
use darknet_sys as sys;
use std::ffi::CString;
use std::fs;
use std::io;
use std::os::raw::c_int;
use std::ptr;
use std::sync::Arc;
pub fn load_labels(file_name: &str) -> Result<Vec<String>, io::Error> {
Ok(fs::read_to_string(file_name)?
.lines()
.map(|x| x.trim().to_string())
.collect())
}
pub struct Network {
net: Box<sys::network>,
labels: Arc<Vec<String>>,
}
impl Network {
pub fn load(
cfg: &str,
weights: Option<&str>,
clear: bool,
labels: Vec<String>,
) -> Option<Network> {
let weights = match weights {
Some(w) => CString::new(w)
.expect("CString::new(weights_file) failed")
.into_raw(),
None => ptr::null_mut(),
};
unsafe {
let net = sys::load_network(
CString::new(cfg)
.expect("CString::new(config_file) failed")
.into_raw(),
weights,
clear as c_int,
);
if net != ptr::null_mut() {
sys::set_batch_network(net, 1);
return Some(Network {
net: Box::from_raw(net),
labels: Arc::new(labels),
});
} else {
return None;
}
}
}
pub fn get_w(&self) -> usize {
self.net.w as usize
}
pub fn get_h(&self) -> usize {
self.net.h as usize
}
pub fn predict(&mut self, image: &mut Image, thresh: f32, nms: f32) -> Detections {
image.resize(self.get_w(), self.get_h());
unsafe {
sys::network_predict(&mut *self.net, image.get_raw_data());
let mut nboxes: c_int = 0;
let det_ptr = sys::get_network_boxes(
&mut *self.net,
1,
1,
thresh,
0.0,
ptr::null_mut(),
0,
&mut nboxes,
);
if nms != 0.0 {
sys::do_nms_sort(det_ptr, nboxes, self.labels.len() as i32, nms);
}
Detections::new(
Vec::from_raw_parts(det_ptr, nboxes as usize, nboxes as usize),
&self.labels,
thresh,
)
}
}
pub fn save_weights(&mut self, file_name: &str) {
let file_name = CString::new(file_name).expect("CString::new(file_name) failed");
unsafe {
sys::save_weights(&mut *self.net, file_name.into_raw());
}
}
pub fn get_labels(&self) -> Vec<String> {
self.labels.as_ref().clone()
}
}