def _init(self, cam, size=(640, 480), fps=None, timebase=None):
# setting up device
self.device = cam.device
self.deviceSettings = vi.DeviceSettings()
self.deviceSettings.symbolicLink = self.device.symbolicName
self.deviceSettings.indexStream = 0
self.deviceSettings.indexMediaType = 0
self.captureSettings = vi.CaptureSettings()
self.captureSettings.readMode = vi.ReadMode.SYNC
self.captureSettings.videoFormat = vi.CaptureVideoFormat.RGB32
self.stream = self.device.listStream[self.deviceSettings.indexStream]
# collecting additional information
if timebase == None:
logger.debug("Capture will run with default system timebase")
self.timebase = 0
else:
logger.debug("Capture will run with app wide adjustable timebase")
self.timebase = timebase
self.width = size[0]
self.height = size[1]
self.preferred_fps = fps
self._initFrameRates()
self._initMediaTypeId()
self.context = _getVideoInputInstance()
res = self.context.setupDevice(self.deviceSettings,
self.captureSettings)
if res != vi.ResultCode.OK:
raise CameraCaptureError("Could not setup device. Error code: %d" %
(res))
# creating frame buffer and initializing capture settings
frame = np.empty((self.actual_height * self.actual_width * 4),
dtype=np.uint8)
self.readSetting = vi.ReadSetting()
self.readSetting.symbolicLink = self.deviceSettings.symbolicLink
self.readSetting.setNumpyArray(frame)
frame.shape = (self.actual_height, self.actual_width, -1)
self._frame = frame
logger.debug(
"Successfully set up device: %s @ %dx%dpx %dfps (mediatype %d)" %
(self.name, self.actual_height, self.actual_width, self.frame_rate,
self.deviceSettings.indexMediaType))
def init_capture(self, uid, size=(640, 480), fps=None, timebase=None):
self.uid = uid
if uid is not None:
# validate parameter UID
devices = device_list(
) # TODO: read list only once (initially) to save runtime
for device in devices:
print
if device['uid'] == uid:
break
if device['uid'] != uid:
msg = ERR_INIT_FAIL + "UID of camera was not found."
logger.error(msg)
self.init_capture(None, size, fps, timebase)
return
# validate parameter SIZE
if not len(size) == 2:
msg = ERR_INIT_FAIL + "Parameter 'size' must have length 2."
logger.error(msg)
self.init_capture(None, size, fps, timebase)
return
# setting up device
self.device = device
self.deviceSettings = vi.DeviceSettings()
self.deviceSettings.symbolicLink = self.device['uid']
self.deviceSettings.indexStream = 0
self.deviceSettings.indexMediaType = 0
self.captureSettings = vi.CaptureSettings()
self.captureSettings.readMode = vi.ReadMode.SYNC
self.captureSettings.videoFormat = vi.CaptureVideoFormat.RGB32
self.stream = self.device['handle'].listStream[
self.deviceSettings.indexStream]
# set timebase
if timebase == None:
logger.debug("Capture will run with default system timebase")
self.timebase = 0
else:
logger.debug(
"Capture will run with app wide adjustable timebase")
self.timebase = timebase
# set properties
self.width = size[0]
self.height = size[1]
self.preferred_fps = fps
self._initFrameRates()
self._initMediaTypeId()
# robust camera initialization
self.context = _getVideoInputInstance()
while True:
res = self.context.setupDevice(self.deviceSettings,
self.captureSettings)
if res != vi.ResultCode.OK:
self._failed_inits += 1
msg = ERR_INIT_FAIL + "Fall back to Fake Capture. Error code: %d" % (
res)
if self._failed_inits < MAX_RETRY_INIT_CAMERA:
logger.warning(
"Retry initializing camera: {0}/{1}: ".format(
self._failed_inits, MAX_RETRY_INIT_CAMERA) +
msg)
else:
logger.error(msg)
self._failed_inits = 0
self.init_capture(None, size, fps, timebase)
return
sleep(0.25)
else:
break
# creating frame buffer and initializing capture settings
frame = np.empty((self.actual_height * self.actual_width * 4),
dtype=np.uint8)
self.readSetting = vi.ReadSetting()
self.readSetting.symbolicLink = self.deviceSettings.symbolicLink
self.readSetting.setNumpyArray(frame)
frame.shape = (self.actual_height, self.actual_width, -1)
self._frame = frame
logger.debug(
"Successfully set up device: %s @ %dx%dpx %dfps (mediatype %d)"
% (self.name, self.actual_height, self.actual_width,
self.frame_rate, self.deviceSettings.indexMediaType))
else:
self.device = Fake_Capture()
self.width = size[0]
self.height = size[1]
self.preferred_fps = fps
self._is_initialized = True
self._failed_inits = 0
def _init(self, uid, size=(640,480), fps=None, timebase=None):
devices = vi.DeviceList()
for cam in _getVideoInputInstance().getListOfDevices(devices):
if cam.symbolicName == uid:
break
if cam.symbolicName != uid:
raise CameraCaptureError("uid for camera not found.")
if not len(size) == 2:
msg = ERR_INIT_FAIL + "Parameter 'size' must have length 2."
logger.error(msg)
raise CameraCaptureError(msg)
# setting up device
self.device = cam.device
self.deviceSettings = vi.DeviceSettings()
self.deviceSettings.symbolicLink = self.device.symbolicName
self.deviceSettings.indexStream = 0
self.deviceSettings.indexMediaType = 0
self.captureSettings = vi.CaptureSettings()
self.captureSettings.readMode = vi.ReadMode.SYNC
self.captureSettings.videoFormat = vi.CaptureVideoFormat.RGB32
self.stream = self.device.listStream[self.deviceSettings.indexStream]
# collecting additional information
if timebase == None:
logger.debug("Capture will run with default system timebase")
self.timebase = 0
else:
logger.debug("Capture will run with app wide adjustable timebase")
self.timebase = timebase
self.width = size[0]
self.height = size[1]
self.preferred_fps = fps
self._initFrameRates()
self._initMediaTypeId()
self.context = _getVideoInputInstance()
while True:
res = self.context.setupDevice(self.deviceSettings, self.captureSettings)
if res != vi.ResultCode.OK:
self._failed_inits += 1
msg = ERR_INIT_FAIL + "Error code: %d" %(res)
if self._failed_inits < MAX_RETRY_INIT_CAMERA:
logger.error("Retry initializing camera: {0}/{1}: ".format(self._failed_inits, MAX_RETRY_INIT_CAMERA) + msg)
else:
logger.error(msg)
raise CameraCaptureError(msg)
sleep(1)
else:
break
# creating frame buffer and initializing capture settings
frame = np.empty((self.actual_height * self.actual_width * 4), dtype=np.uint8)
self.readSetting = vi.ReadSetting()
self.readSetting.symbolicLink = self.deviceSettings.symbolicLink
self.readSetting.setNumpyArray(frame)
frame.shape = (self.actual_height, self.actual_width, -1)
self._frame = frame
logger.debug("Successfully set up device: %s @ %dx%dpx %dfps (mediatype %d)" %(self.name, self.actual_height, self.actual_width, self.frame_rate, self.deviceSettings.indexMediaType))
self._is_initialized = True
self._failed_inits = 0
devices = vi.DeviceList()
vin.getListOfDevices(devices)
for d in devices:
assert isinstance(d, vi.Device)
print d.friendlyName, d.symbolicName
dev = d
dev = devices[1]
assert isinstance(dev, vi.Device)
print "LOADED CAPTURE DEVICES"
deviceSettings = vi.DeviceSettings()
deviceSettings.symbolicLink = dev.symbolicName
deviceSettings.indexStream = 0
deviceSettings.indexMediaType = 195
captureSettings = vi.CaptureSettings()
captureSettings.readMode = vi.ReadMode.SYNC
captureSettings.videoFormat = vi.CaptureVideoFormat.RGB24
stream = dev.listStream[0]
assert isinstance(stream, vi.Stream)
mediaType = stream.listMediaType[195]
for mt in stream.listMediaType:
print mt.width, mt.height, mt.MF_MT_FRAME_RATE
assert isinstance(mediaType, vi.MediaType)
frame = np.zeros((mediaType.height, mediaType.width, 3), dtype=np.uint8)
frame.shape = (mediaType.height * mediaType.width * 3)
res = vin.setupDevice(deviceSettings, captureSettings)
if res != 0: