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import pygame
import numpy
import opencv
#this is important for capturing/displaying images
from opencv import highgui
def list_cameras():
"""
"""
# -1 for opencv means get any of them.
return [-1]
def init():
pass
def quit():
pass
class Camera:
def __init__(self, device=0, size=(640, 480), mode="RGB"):
"""
"""
self.camera = highgui.cvCreateCameraCapture(device)
if not self.camera:
raise ValueError("Could not open camera. Sorry.")
def set_controls(self, **kwargs):
"""
"""
def set_resolution(self, width, height):
"""Sets the capture resolution. (without dialog)
"""
# nothing to do here.
pass
def query_image(self):
return True
def stop(self):
pass
def start(self):
# do nothing here... since the camera is already open.
pass
def get_buffer(self):
"""Returns a string containing the raw pixel data.
"""
return self.get_surface().get_buffer()
def get_image(self, dest_surf=None):
return self.get_surface(dest_surf)
def get_surface(self, dest_surf=None):
camera = self.camera
im = highgui.cvQueryFrame(camera)
#convert Ipl image to PIL image
if not im:
return None
xx = opencv.adaptors.Ipl2NumPy(im)
xxx = numpy.reshape(xx, (numpy.product(xx.shape),))
if xx.shape[2] != 3:
raise ValueError("not sure what to do about this size")
pg_img = pygame.image.frombuffer(xxx, (xx.shape[1], xx.shape[0]), "RGB")
# if there is a destination surface given, we blit onto that.
if dest_surf:
dest_surf.blit(pg_img, (0, 0))
return dest_surf
if __name__ == "__main__":
# try and use this camera stuff with the pygame camera example.
import pygame.examples.camera
pygame.camera.Camera = Camera
pygame.camera.list_cameras = list_cameras
pygame.examples.camera.main()
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