rahix/openflexure-microscope-server
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Added lock acquisition to preview functions

Browse source
This commit is contained in:
Joel Collins 2020-07-15 17:18:23 +01:00
parent 4bf866b66b
commit fccc58fd62
1 changed files with 24 additions and 21 deletions
Download patch file Download diff file Expand all files Collapse all files

45
openflexure_microscope/camera/pi.py
View file

@ -327,32 +327,35 @@ class PiCameraStreamer(BaseCamera):
"""Start the on board GPU camera preview."""
logging.info("Starting the GPU preview")
try:
if not self.camera.preview:
logging.debug("Starting preview")
self.camera.start_preview(fullscreen=fullscreen, window=window)
else:
logging.debug("Resizing preview")
if window:
self.camera.preview.window = window
if fullscreen:
self.camera.preview.fullscreen = fullscreen
self.preview_active = True
except picamera.exc.PiCameraMMALError as e:
logging.error(
"Suppressed a MMALError in start_preview. Exception: {}".format(e)
)
except picamera.exc.PiCameraValueError as e:
logging.error(
"Suppressed a ValueError exception in start_preview. Exception: {}".format(
e
with self.lock():
try:
if not self.camera.preview:
logging.debug("Starting preview")
self.camera.start_preview(fullscreen=fullscreen, window=window)
else:
logging.debug("Resizing preview")
if window:
self.camera.preview.window = window
if fullscreen:
self.camera.preview.fullscreen = fullscreen
self.preview_active = True
except picamera.exc.PiCameraMMALError as e:
logging.error(
"Suppressed a MMALError in start_preview. Exception: {}".format(e)
)
except picamera.exc.PiCameraValueError as e:
logging.error(
"Suppressed a ValueError exception in start_preview. Exception: {}".format(
e
)
)
def stop_preview(self):
"""Stop the on board GPU camera preview."""
self.camera.stop_preview()
self.preview_active = False
with self.lock():
if self.camera.preview:
self.camera.stop_preview()
self.preview_active = False
def start_recording(self, output, fmt: str = "h264", quality: int = 15):
"""Start recording.