Mercurial > pygame

annotate examples/camera.py @ 3182:0c07af110477 docs-changes

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author Thomas Kluyver <takowl@gmail.com>
date Wed, 09 Jan 2013 22:35:43 +0000
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1 #!/usr/bin/env python
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2
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3 # 1. Basic image capturing and displaying using the camera module
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4
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5 import pygame
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6 import pygame.camera
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7 from pygame.locals import *
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8
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9
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10 class VideoCapturePlayer(object):
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11
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12 size = ( 640, 480 )
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13 def __init__(self, **argd):
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14 self.__dict__.update(**argd)
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15 super(VideoCapturePlayer, self).__init__(**argd)
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16
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17 # create a display surface. standard pygame stuff
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18 self.display = pygame.display.set_mode( self.size, 0 )
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19 self.init_cams(0)
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20
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21 def init_cams(self, which_cam_idx):
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22
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23 # gets a list of available cameras.
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24 self.clist = pygame.camera.list_cameras()
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25 print (self.clist)
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26
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27 if not self.clist:
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28 raise ValueError("Sorry, no cameras detected.")
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29
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30 try:
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31 cam_id = self.clist[which_cam_idx]
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32 except IndexError:
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33 cam_id = self.clist[0]
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34
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35 # creates the camera of the specified size and in RGB colorspace
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36 self.camera = pygame.camera.Camera(cam_id, self.size, "RGB")
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37
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38 # starts the camera
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39 self.camera.start()
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40
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41 self.clock = pygame.time.Clock()
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42
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43 # create a surface to capture to. for performance purposes, you want the
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44 # bit depth to be the same as that of the display surface.
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45 self.snapshot = pygame.surface.Surface(self.size, 0, self.display)
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46
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47 def get_and_flip(self):
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48 # if you don't want to tie the framerate to the camera, you can check and
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49 # see if the camera has an image ready. note that while this works
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50 # on most cameras, some will never return true.
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51 if 0 and self.camera.query_image():
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52 # capture an image
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53
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54 self.snapshot = self.camera.get_image(self.snapshot)
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55
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56 if 0:
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57 self.snapshot = self.camera.get_image(self.snapshot)
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58 #self.snapshot = self.camera.get_image()
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59
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60 # blit it to the display surface. simple!
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61 self.display.blit(self.snapshot, (0,0))
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62 else:
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63 self.snapshot = self.camera.get_image(self.display)
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64 #self.display.blit(self.snapshot, (0,0))
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67 pygame.display.flip()
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69 def main(self):
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70 going = True
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71 while going:
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72 events = pygame.event.get()
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73 for e in events:
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74 if e.type == QUIT or (e.type == KEYDOWN and e.key == K_ESCAPE):
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75 going = False
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76 if e.type == KEYDOWN:
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77 if e.key in range(K_0, K_0+10) :
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78 self.init_cams(e.key - K_0)
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80
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81 self.get_and_flip()
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82 self.clock.tick()
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83 print (self.clock.get_fps())
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84
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85 def main():
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86 pygame.init()
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87 pygame.camera.init()
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88 VideoCapturePlayer().main()
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89 pygame.quit()
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91 if __name__ == '__main__':
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92 main()