116 lines
3.0 KiB
Python
116 lines
3.0 KiB
Python
from PySide6.QtCore import QObject, QThread, QTimer, Signal, Slot, QMutex, QMutexLocker
|
|
from PySide6.QtGui import QImage, QPixmap
|
|
import cv2
|
|
|
|
from .base_camera import BaseCamera
|
|
|
|
|
|
class CameraController(QThread):
|
|
frame_ready = Signal(QPixmap)
|
|
photo_ready = Signal(QPixmap)
|
|
error_occurred = Signal(str)
|
|
_enable_timer = Signal(bool)
|
|
|
|
|
|
def __init__(self, parent: QObject | None = None) -> None:
|
|
super().__init__(parent)
|
|
self.camera = None
|
|
self.timer = None
|
|
self.fps = 15
|
|
self.is_streaming = False
|
|
self.is_connected = False
|
|
|
|
self._camera_mutex = QMutex()
|
|
self.start()
|
|
|
|
|
|
def run(self) -> None:
|
|
self.timer = QTimer()
|
|
self.timer.timeout.connect(self._update_frame)
|
|
self._enable_timer.connect(self._set_timer)
|
|
self.exec()
|
|
|
|
def stop(self):
|
|
self.stop_camera()
|
|
self.quit()
|
|
self.wait()
|
|
|
|
def set_camera(self, camera: BaseCamera, fps: int = 15) -> None:
|
|
with QMutexLocker(self._camera_mutex):
|
|
self.stop_stream()
|
|
self.stop_camera()
|
|
|
|
self.camera = camera
|
|
self.fps = fps
|
|
|
|
def start_camera(self) -> None:
|
|
if self.camera is None or self.is_connected:
|
|
return
|
|
|
|
if self.camera.connect():
|
|
self.is_connected = True
|
|
else:
|
|
self.is_connected = False
|
|
self.error_occurred.emit(self.camera.get_error_msg())
|
|
|
|
def stop_camera(self) -> None:
|
|
if self.is_streaming:
|
|
self.stop_stream()
|
|
|
|
if self.camera is not None:
|
|
self.camera.disconnect()
|
|
|
|
self.is_connected = False
|
|
|
|
def start_stream(self):
|
|
if not self.is_connected:
|
|
return
|
|
|
|
if self.is_streaming:
|
|
return
|
|
|
|
if self.timer:
|
|
self.is_streaming = True
|
|
# self.timer.start()
|
|
self._enable_timer.emit(True)
|
|
|
|
def stop_stream(self) -> None:
|
|
if self.is_streaming:
|
|
self.is_streaming = False
|
|
if self.timer:
|
|
# self.timer.stop()
|
|
self._enable_timer.emit(False)
|
|
|
|
def _update_frame(self) -> None:
|
|
with QMutexLocker(self._camera_mutex):
|
|
if self.camera is None or not self.is_connected:
|
|
return
|
|
|
|
if not self.is_streaming:
|
|
return
|
|
|
|
ret, frame = self.camera.get_frame()
|
|
|
|
if not ret:
|
|
self.error_occurred.emit(self.camera.get_error_msg())
|
|
return
|
|
|
|
if frame is not None:
|
|
rgb_image = cv2.cvtColor(frame, cv2.COLOR_BGR2RGB)
|
|
h, w, ch = rgb_image.shape
|
|
qimg = QImage(rgb_image.data, w, h, ch * w, QImage.Format.Format_RGB888)
|
|
pixmap = QPixmap.fromImage(qimg)
|
|
|
|
self.frame_ready.emit(pixmap)
|
|
|
|
def _set_timer(self, enable: bool):
|
|
if not self.timer:
|
|
return
|
|
|
|
if enable:
|
|
self.timer.setInterval(int(1000 / self.fps))
|
|
self.timer.start()
|
|
else:
|
|
self.timer.stop()
|
|
|