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annotate bin/picamserve @ 1091:50a68abd2b0e

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comment Ignore-this: dd6216479fa438813e84869f94e15efa
author Drew Perttula <drewp@bigasterisk.com>
date Thu, 05 Jun 2014 07:49:48 +0000
parents 2ee97997ee56
children 087f6cbe4b22
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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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, time
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6 import cyclone.web
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7 from twisted.internet import reactor, threads
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8 from twisted.internet.defer import inlineCallbacks
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9 from light9 import prof
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10
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11 try:
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12 import picamera
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13 cameraCls = picamera.PiCamera
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14 except ImportError:
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15 class cameraCls(object):
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16 def __enter__(self): return self
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17 def __exit__(self, *a): pass
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18 def capture(self, out, *a, **kw):
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19 out.write(open('yuv.demo').read())
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20 def capture_continuous(self, *a, **kw):
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21 for i in range(1000):
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22 time.sleep(1)
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23 yield str(i)
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24
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25 def setCameraParams(c, arg):
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26 res = int(arg('res', 480))
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27 c.resolution = {
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28 480: (640, 480),
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29 1080: (1920, 1080),
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30 1944: (2592, 1944),
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31 }[res]
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32 c.shutter_speed = int(arg('shutter', 50000))
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33 c.exposure_mode = arg('exposure_mode', 'fixedfps')
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34 c.awb_mode = arg('awb_mode', 'off')
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35 c.brightness = int(arg('brightness', 50))
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36
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37 c.awb_gains = (float(arg('redgain', 1)), float(arg('bluegain', 1)))
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38 c.ISO = int(arg('iso', 250))
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39
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40 def setupCrop(c, arg):
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41 c.crop = (float(arg('x', 0)), float(arg('y', 0)),
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42 float(arg('w', 1)), float(arg('h', 1)))
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43 rw = rh = int(arg('resize', 100))
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44 # width 1920, showing w=.3 of image, resize=100 -> scale is 100/.3*1920
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45 # scl is [ output px / camera px ]
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46 scl1 = rw / (c.crop[2] * c.resolution[0])
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47 scl2 = rh / (c.crop[3] * c.resolution[1])
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48 if scl1 < scl2:
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49 # width is the constraint; reduce height to the same scale
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50 rh = int(scl1 * c.crop[3] * c.resolution[1])
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51 else:
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52 # height is the constraint
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53 rw = int(scl2 * c.crop[2] * c.resolution[0])
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54 return rw, rh
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55
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56 @prof.logTime
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57 def getFrame(c, arg):
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58 setCameraParams(c, arg)
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59 resize = setupCrop(c, arg)
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60 out = io.BytesIO('w')
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61 prof.logTime(c.capture)(out, 'jpeg', use_video_port=True, resize=resize)
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62 return out.getvalue()
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63
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64 class Pic(cyclone.web.RequestHandler):
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65 def get(self):
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66 try:
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67 self.set_header('Content-Type', 'image/jpeg')
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68 self.write(getFrame(self.settings.camera, self.get_argument))
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69 except Exception:
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70 traceback.print_exc()
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71
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72 def captureContinuousAsync(c, resize, onFrame):
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73 """
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74 Calls c.capture_continuous is called in another thread. onFrame is
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75 called in this reactor thread with each (frameTime, frame)
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76 result. Runs until onFrame raises StopIteration.
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77 """
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78 def runner(c, resize):
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79 stream = io.BytesIO()
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80 t = time.time()
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81 for nextFrame in c.capture_continuous(stream, 'jpeg', use_video_port=True,
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82 resize=resize):
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83 t2 = time.time()
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84 log.debug(" - framecap got %s bytes in %.1f ms",
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85 len(stream.getvalue()), 1000 * (t2 - t))
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86 try:
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87 # This is slow, like 13ms. Hopefully
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88 # capture_continuous is working on gathering the next
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89 # pic during this time instead of pausing.
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90 # Instead, we could be stashing frames onto a queue or
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91 # something that the main thread can pull when
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92 # possible (and toss if it gets behind).
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93 threads.blockingCallFromThread(reactor,
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94 onFrame, t, stream.getvalue())
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95 except StopIteration:
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96 break
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97 t3 = time.time()
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98 log.debug(" - sending to onFrame took %.1fms", 1000 * (t3 - t2))
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99 stream.truncate()
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100 stream.seek(0)
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101 t = time.time()
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102 return threads.deferToThread(runner, c, resize)
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103
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104 class FpsReport(object):
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105 def __init__(self):
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106 self.frameTimes = []
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107 self.lastFpsLog = 0
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108
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109 def frame(self):
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110 now = time.time()
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111
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112 self.frameTimes.append(now)
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113
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114 if len(self.frameTimes) > 15:
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115 del self.frameTimes[:5]
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116
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117 if now > self.lastFpsLog + 2 and len(self.frameTimes) > 5:
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118 deltas = [(b - a) for a, b in zip(self.frameTimes[:-1],
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119 self.frameTimes[1:])]
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120 avg = sum(deltas) / len(deltas)
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121 log.info("fps: %.1f", 1 / avg)
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122 self.lastFpsLog = now
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123
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124
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125 class Pics(cyclone.web.RequestHandler):
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126 @inlineCallbacks
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127 def get(self):
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128 try:
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129 self.set_header('Content-Type', 'x-application/length-time-jpeg')
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130 c = self.settings.camera
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131 setCameraParams(c, self.get_argument)
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132 resize = setupCrop(c, self.get_argument)
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133
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134 self.running = True
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135 log.info("connection open from %s", self.request.remote_ip)
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136 fpsReport = FpsReport()
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137
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138 def onFrame(frameTime, frame):
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139 if not self.running:
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140 raise StopIteration
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141
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142 now = time.time()
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143 self.write("%s %s\n" % (len(frame), frameTime))
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144 self.write(frame)
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145 self.flush()
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146
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147 fpsReport.frame()
1091
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148 # another camera request coming in at the same time breaks
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149 # the server. it would be nice if this request could
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150 # let-go-and-reopen when it knows about another request
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151 # coming in
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152 yield captureContinuousAsync(c, resize, onFrame)
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153 except Exception:
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154 traceback.print_exc()
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155
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156 def on_connection_close(self, *a, **kw):
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157 log.info("connection closed")
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158 self.running = False
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159
1087
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160 log.setLevel(logging.INFO)
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161
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162 with cameraCls() as camera:
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163 port = 8001
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164 reactor.listenTCP(port, cyclone.web.Application(handlers=[
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165 (r'/pic', Pic),
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166 (r'/pics', Pics),
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167 (r'/static/(.*)', cyclone.web.StaticFileHandler, {'path': 'static/'}),
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168 (r'/(|gui.js)', cyclone.web.StaticFileHandler, {'path': 'light9/vidref/',
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169 'default_filename': 'index.html'}),
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170 ], debug=True, camera=camera))
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171 log.info("serving on %s" % port)
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172 reactor.run()