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new picamserve for raspberry pi camera -> http, especially with crop control Ignore-this: 38fc34a6eff577c05129df87d6133a95
author Drew Perttula <drewp@bigasterisk.com>
date Wed, 04 Jun 2014 08:30:45 +0000
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children bb92c50438ed
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rev   line source
1087
1f877950ad28 new picamserve for raspberry pi camera -> http, especially with crop control
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1 #!env_pi/bin/python
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2 from __future__ import division
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3 from run_local import log
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4 import sys;sys.path.append('/usr/lib/python2.7/dist-packages/')
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5 import io, logging, traceback
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6 import cyclone.web
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7 from twisted.internet import reactor
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8 from light9 import prof
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9
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10 try:
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11 import picamera
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12 cameraCls = picamera.PiCamera
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13 except ImportError:
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14 class cameraCls(object):
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15 def __enter__(self): return self
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16 def __exit__(self): pass
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17 def capture(self, out, *a, **kw):
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18 out.write(open('yuv.demo').read())
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19
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20 @prof.logTime
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21 def getFrame(c, arg):
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22 res = int(arg('res', 480))
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23 c.resolution = {
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24 480: (640, 480),
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25 1080: (1920, 1080),
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26 1944: (2592, 1944),
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27 }[res]
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28 c.shutter_speed = int(arg('shutter', 50000))
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29 c.exposure_mode = arg('exposure_mode', 'fixedfps')
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30 c.awb_mode = arg('awb_mode', 'off')
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31 c.brightness = int(arg('brightness', 50))
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32
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33 c.awb_gains = (float(arg('redgain', 1)), float(arg('bluegain', 1)))
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34 c.crop = (float(arg('x', 0)), float(arg('y', 0)),
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35 float(arg('w', 1)), float(arg('h', 1)))
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36 rw = rh = int(arg('resize', 100))
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37 # width 1920, showing w=.3 of image, resize=100 -> scale is 100/.3*1920
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38 # scl is [ output px / camera px ]
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39 scl1 = rw / (c.crop[2] * c.resolution[0])
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40 scl2 = rh / (c.crop[3] * c.resolution[1])
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41 if scl1 < scl2:
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42 # width is the constraint; reduce height to the same scale
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43 rh = int(scl1 * c.crop[3] * c.resolution[1])
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44 else:
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45 # height is the constraint
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46 rw = int(scl2 * c.crop[2] * c.resolution[0])
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47 c.ISO = int(arg('iso', 250))
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48 out = io.BytesIO('w')
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49 prof.logTime(c.capture)(out, 'jpeg', use_video_port=True, resize=(rw, rh))
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50 return out.getvalue()
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51
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52 class Pic(cyclone.web.RequestHandler):
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53 def get(self):
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54 try:
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55 self.set_header('Content-Type', 'image/jpeg')
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56 self.write(getFrame(self.settings.camera, self.get_argument))
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57 except Exception:
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58 traceback.print_exc()
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59
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60 log.setLevel(logging.INFO)
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61
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62 with cameraCls() as camera:
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63 port = 8001
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64 reactor.listenTCP(port, cyclone.web.Application(handlers=[
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65 (r'/pic', Pic),
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66 (r'/static/(.*)', cyclone.web.StaticFileHandler, {'path': 'static/'}),
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67 (r'/(|gui.js)', cyclone.web.StaticFileHandler, {'path': 'light9/vidref/',
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68 'default_filename': 'index.html'}),
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69 ], debug=True, camera=camera))
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70 log.info("serving on %s" % port)
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71 reactor.run()