134 lines
3.7 KiB
Python
134 lines
3.7 KiB
Python
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"""pygame.camera.Camera implementation using the videocapture module for windows.
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http://videocapture.sourceforge.net/
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Binary windows wheels:
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https://www.lfd.uci.edu/~gohlke/pythonlibs/#videocapture
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"""
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import pygame
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def list_cameras():
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"""Always only lists one camera.
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Functionality not supported in videocapture module.
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"""
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return [0]
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# this just cycles through all the cameras trying to open them
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cameras = []
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for x in range(256):
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try:
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c = Camera(x)
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except:
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break
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cameras.append(x)
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return cameras
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def init():
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global vidcap
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try:
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import vidcap as vc
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except ImportError:
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from VideoCapture import vidcap as vc
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vidcap = vc
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def quit():
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global vidcap
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pass
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del vidcap
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class Camera:
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def __init__(self, device =0,
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size = (640,480),
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mode = "RGB",
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show_video_window=0):
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"""device: VideoCapture enumerates the available video capture devices
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on your system. If you have more than one device, specify
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the desired one here. The device number starts from 0.
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show_video_window: 0 ... do not display a video window (the default)
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1 ... display a video window
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Mainly used for debugging, since the video window
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can not be closed or moved around.
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"""
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self.dev = vidcap.new_Dev(device, show_video_window)
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width, height = size
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self.dev.setresolution(width, height)
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def display_capture_filter_properties(self):
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"""Displays a dialog containing the property page of the capture filter.
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For VfW drivers you may find the option to select the resolution most
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likely here.
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"""
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self.dev.displaycapturefilterproperties()
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def display_capture_pin_properties(self):
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"""Displays a dialog containing the property page of the capture pin.
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For WDM drivers you may find the option to select the resolution most
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likely here.
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"""
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self.dev.displaycapturepinproperties()
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def set_resolution(self, width, height):
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"""Sets the capture resolution. (without dialog)
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"""
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self.dev.setresolution(width, height)
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def get_buffer(self):
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"""Returns a string containing the raw pixel data.
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"""
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return self.dev.getbuffer()
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def start(self):
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""" Not implemented.
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"""
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def set_controls(self, **kwargs):
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""" Not implemented.
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"""
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def stop(self):
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""" Not implemented.
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"""
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def get_image(self, dest_surf = None):
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"""
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"""
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return self.get_surface(dest_surf)
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def get_surface(self, dest_surf = None):
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"""Returns a pygame Surface.
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"""
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abuffer, width, height = self.get_buffer()
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if abuffer:
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surf = pygame.image.frombuffer(abuffer, (width, height), "RGB")
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# swap it from a BGR surface to an RGB surface.
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r,g,b,a = surf.get_masks()
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surf.set_masks((b,g,r,a))
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r,g,b,a = surf.get_shifts()
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surf.set_shifts((b,g,r,a))
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surf = pygame.transform.flip(surf, 0,1)
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# if there is a destination surface given, we blit onto that.
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if dest_surf:
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dest_surf.blit(surf, (0,0))
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else:
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dest_surf = surf
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return dest_surf
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if __name__ == "__main__":
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import pygame.examples.camera
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pygame.camera.Camera = Camera
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pygame.camera.list_cameras = list_cameras
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pygame.examples.camera.main()
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