137 lines
4.2 KiB
Python
137 lines
4.2 KiB
Python
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"""BSD 2-Clause License
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Copyright (c) 2019, Allied Vision Technologies GmbH
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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1. Redistributions of source code must retain the above copyright notice, this
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list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright notice,
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this list of conditions and the following disclaimer in the documentation
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and/or other materials provided with the distribution.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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"""
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import sys
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from typing import Optional, Tuple
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from vimba import *
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def print_preamble():
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print('///////////////////////////////////////////')
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print('/// Vimba API Asynchronous Grab Example ///')
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print('///////////////////////////////////////////\n')
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def print_usage():
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print('Usage:')
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print(' python asynchronous_grab.py [/x] [-x] [camera_id]')
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print(' python asynchronous_grab.py [/h] [-h]')
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print()
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print('Parameters:')
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print(' /x, -x If set, use AllocAndAnnounce mode of buffer allocation')
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print(' camera_id ID of the camera to use (using first camera if not specified)')
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print()
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def abort(reason: str, return_code: int = 1, usage: bool = False):
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print(reason + '\n')
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if usage:
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print_usage()
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sys.exit(return_code)
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def parse_args() -> Tuple[Optional[str], AllocationMode]:
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args = sys.argv[1:]
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argc = len(args)
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allocation_mode = AllocationMode.AnnounceFrame
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cam_id = ""
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for arg in args:
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if arg in ('/h', '-h'):
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print_usage()
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sys.exit(0)
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elif arg in ('/x', '-x'):
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allocation_mode = AllocationMode.AllocAndAnnounceFrame
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elif not cam_id:
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cam_id = arg
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if argc > 2:
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abort(reason="Invalid number of arguments. Abort.", return_code=2, usage=True)
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return (cam_id if cam_id else None, allocation_mode)
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def get_camera(camera_id: Optional[str]) -> Camera:
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with Vimba.get_instance() as vimba:
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if camera_id:
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try:
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return vimba.get_camera_by_id(camera_id)
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except VimbaCameraError:
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abort('Failed to access Camera \'{}\'. Abort.'.format(camera_id))
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else:
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cams = vimba.get_all_cameras()
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if not cams:
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abort('No Cameras accessible. Abort.')
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return cams[0]
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def setup_camera(cam: Camera):
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with cam:
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# Try to adjust GeV packet size. This Feature is only available for GigE - Cameras.
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try:
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cam.GVSPAdjustPacketSize.run()
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while not cam.GVSPAdjustPacketSize.is_done():
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pass
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except (AttributeError, VimbaFeatureError):
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pass
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def frame_handler(cam: Camera, frame: Frame):
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print('{} acquired {}'.format(cam, frame), flush=True)
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cam.queue_frame(frame)
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def main():
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print_preamble()
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cam_id, allocation_mode = parse_args()
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with Vimba.get_instance():
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with get_camera(cam_id) as cam:
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setup_camera(cam)
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print('Press <enter> to stop Frame acquisition.')
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try:
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# Start Streaming with a custom a buffer of 10 Frames (defaults to 5)
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cam.start_streaming(handler=frame_handler, buffer_count=10, allocation_mode=allocation_mode)
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input()
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finally:
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cam.stop_streaming()
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if __name__ == '__main__':
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main()
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