def capture_thread(capture_count):
# PTP Protocol Prep
ptpTransport = PtpUsbTransport(
PtpUsbTransport.findptps(PtpUsbTransport.USB_CLASS_PTP))
bulk_in, bulk_out, interrupt_in = \
PtpUsbTransport.retrieve_device_endpoints(
PtpUsbTransport.findptps(PtpUsbTransport.USB_CLASS_PTP))
ptpSession = PtpSession(ptpTransport)
vendorId = PtpValues.Vendors.STANDARD
image_file_name = None
camera = Camera.query.get(session_id)
try:
# Open device session
ptpSession.OpenSession()
for _ in range(capture_count):
ptpSession.InitiateCapture(
objectFormatId=PtpValues.StandardObjectFormats.EXIF_JPEG)
# Check for new object added after capture
objectid = None
while True:
evt = ptpSession.CheckForEvent(None)
if evt == None:
raise Exception("Capture did not complete")
if evt.eventcode == PtpValues.StandardEvents.OBJECT_ADDED:
objectid = evt.params[0]
break
# Download newly added object
image_file_name = \
"latest_%s.jpg" % datetime.now().strftime(
"%Y_%m_%d_%H_%M_%S")
save_path = ensure_path_available(
os.path.expanduser("~") +
"/Documents/optic-nerve/images/") + image_file_name
if objectid is not None:
with open(save_path, "wb") as file:
ptpSession.GetObject(objectid, file)
camera.image_file_name = image_file_name
db.session.commit()
except PtpException as e:
raise PtpException(
"PTP Exception: %s" %
PtpValues.ResponseNameById(e.responsecode, vendorId),
ptpSession, ptpTransport)
except Exception as e:
raise Exception(e)
# Close the session
del ptpSession
del ptpTransport
# Set camera state to complete
camera.camera_state = Camera.STATE_COMPLETE
db.session.commit()
def begin_timelapse(file, delay):
"""Simple function to initiate camera capture and store the result into
the provided file object.n
Note:
Callers should expect the image to have saved correctly if an exception was not
thrown.
Args:
param1: file object opened using 'wb' to result in <class '_io.BufferedWriter'>
param2: delay between captures. In milliseconds.
"""
ptpTransport = PtpUsbTransport(PtpUsbTransport.findptps(PtpUsbTransport.USB_CLASS_PTP))
bulk_in, bulk_out, interrupt_in = \
PtpUsbTransport.retrieve_device_endpoints(PtpUsbTransport.findptps(PtpUsbTransport.USB_CLASS_PTP))
ptpSession = PtpSession(ptpTransport)
vendorId = PtpValues.Vendors.STANDARD
try:
# Open device session
ptpSession.OpenSession()
print(ptpSession.GetFormattedDeviceInfoString())
# Initiate timelapse capture events
id = 0
while True:
ptpSession.InitiateCapture(objectFormatId=PtpValues.StandardObjectFormats.EXIF_JPEG)
# Check for new object added after capture
objectid = None
while True:
evt = ptpSession.CheckForEvent(None)
if evt == None:
raise Exception("Capture did not complete")
if evt.eventcode == PtpValues.StandardEvents.OBJECT_ADDED:
objectid = evt.params[0]
break
# Download newly added object
if objectid != None:
if file is None:
file = open("capture_%i.jpg" % id, "wb")
ptpSession.GetObject(objectid, file)
file.close()
id+=1
ptpSession.DeleteObject(objectid)
# Delay between shots
time.sleep(delay)
except PtpException as e:
print("PTP Exception: %s" % PtpValues.ResponseNameById(e.responsecode, vendorId))
except Exception as e:
print("An exception occurred: %s" % e)
traceback.print_exc()
# Close the session
del ptpSession
del ptpTransport
from ptp.PtpUsbTransport import PtpUsbTransport
from ptp.PtpSession import PtpSession, PtpException
from ptp import PtpValues
ptpTransport = PtpUsbTransport(PtpUsbTransport.findptps()[0])
ptpSession = PtpSession(ptpTransport)
vendorId = PtpValues.Vendors.STANDARD
try:
ptpSession.OpenSession()
deviceInfo = ptpSession.GetDeviceInfo()
vendorId = deviceInfo.VendorExtensionID
id = 0
while True:
ptpSession.InitiateCapture(
objectFormatId=PtpValues.StandardObjectFormats.EXIF_JPEG)
objectid = None
while True:
evt = ptpSession.CheckForEvent(None)
if evt == None:
raise Exception("Capture did not complete")
if evt.eventcode == PtpValues.StandardEvents.OBJECT_ADDED:
objectid = evt.params[0]
break
if objectid != None:
file = open("capture_%i.jpg" % id, "w")
ptpSession.GetObject(objectid, file)
file.close()
id += 1
def capture_new_image(delete_from_device=False, download_image=True):
"""Initiate camera capture and store the result.
Note:
Callers should expect the image to have saved
correctly if an exception was not thrown.
Args:
param1: file object opened using 'wb' to result in
<class '_io.BufferedWriter'>.
"""
# PTP Protocol Prep
ptpTransport = PtpUsbTransport(
PtpUsbTransport.findptps(PtpUsbTransport.USB_CLASS_PTP))
bulk_in, bulk_out, interrupt_in = \
PtpUsbTransport.retrieve_device_endpoints(
PtpUsbTransport.findptps(PtpUsbTransport.USB_CLASS_PTP))
ptpSession = PtpSession(ptpTransport)
vendorId = PtpValues.Vendors.STANDARD
try:
# Open device session
ptpSession.OpenSession()
ptpSession.InitiateCapture(
objectFormatId=PtpValues.StandardObjectFormats.EXIF_JPEG)
# Check for new object added after capture
objectid = None
while True:
evt = ptpSession.CheckForEvent(None)
if evt == None:
raise Exception("Capture did not complete")
if evt.eventcode == PtpValues.StandardEvents.OBJECT_ADDED:
objectid = evt.params[0]
break
# Download newly added object
image_file_name = \
"latest_%s.jpg" % datetime.now().strftime("%Y_%m_%d_%H_%M_%S")
if download_image:
save_path = ensure_path_available(
os.path.expanduser("~") +
"/Documents/optic-nerve/images/") + image_file_name
if objectid is not None:
with open(save_path, "wb") as file:
ptpSession.GetObject(objectid, file)
ptpSession.DeleteObject(objectid)
return image_file_name
except PtpException as e:
raise PtpException(
"PTP Exception: %s" %
PtpValues.ResponseNameById(e.responsecode, vendorId), ptpSession,
ptpTransport)
except Exception as e:
raise Exception(e)
# Close the session
del ptpSession
del ptpTransport