-
Notifications
You must be signed in to change notification settings - Fork 6
/
Copy pathWebStream.py
204 lines (192 loc) · 5.75 KB
/
WebStream.py
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
#!/usr/bin/env python
# -*- coding: utf-8 -*-
'''
# WebStream.py
#
# Copyright 2018 Bill Williams <github.com/Billwilliams1952>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Genera192.168.1.16:800l Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
# MA 02110-1301, USA.
#
'''
import sys
import io
import picamera
import logging
import threading
from threading import Condition
Python3 = True
if sys.version_info[0] == 3:
from http import server
import socketserver
else:
raise ImportError ("\n\n**** This program currently runs under Python3 only. ****")
Python3 = False
from BaseHTTPServer import BaseHTTPRequestHandler, HTTPServer
from SimpleHTTPServer import SimpleHTTPRequestHandler
from Globals import *
PAGE_DISPLAY = ""
'''
The HTML description for the web page.
TODO: Make this an external file that the user can specify at startup or
in the Network tab.
'''
PAGE_SETUP = \
"""\
<html>
<head>
<style>
body {
background-color: rgb(255,255,255);
}
h1 {
background-color: rgb(255,255,255);
color: rgb(0,0,0);
}
h3 {
color: rgb(0,0,0);
}
</style>
<title>microVIEW Video</title>
</head>
<body>
<h1><center>#1</center></h1>
<h3><center>#2</center></h3>
<p style="text-align:center;"><img src="stream.mjpg" width="800" height="600" /></p>
</body>
</html>
"""
output = None # Need a global variable here
class StreamingOutput(object):
def __init__(self):
self.frame = None
self.buffer = io.BytesIO()
self.condition = Condition()
def write(self, buf):
if buf.startswith(b'\xff\xd8'):
# New frame, copy the existing buffer's content and notify all
# clients it's available
self.buffer.truncate()
with self.condition:
self.frame = self.buffer.getvalue()
self.condition.notify_all()
self.buffer.seek(0)
return self.buffer.write(buf)
class StreamingHandler(server.BaseHTTPRequestHandler):
def do_GET(self):
if self.path == '/':
self.send_response(301)
self.send_header('Location', '/index.html')
self.end_headers()
elif self.path == '/index.html':
# Update the HTML with the Heading levels identified in the INI file.
PAGE_DISPLAY = PAGE_SETUP.replace("#1",Globals.headingLevel1).replace("#2",Globals.headingLevel2)
content = PAGE_DISPLAY.encode('utf-8')
self.send_response(200)
self.send_header('Content-Type', 'text/html')
self.send_header('Content-Length', len(content))
self.end_headers()
self.wfile.write(content)
elif self.path == '/stream.mjpg':
self.send_response(200)
self.send_header('Age', 0)
self.send_header('Cache-Control', 'no-cache, private')
self.send_header('Pragma', 'no-cache')
self.send_header('Content-Type', 'multipart/x-mixed-replace; boundary=FRAME')
self.end_headers()
try:
while True:
with output.condition:
output.condition.wait()
frame = output.frame
self.wfile.write(b'--FRAME\r\n')
self.send_header('Content-Type', 'image/jpeg')
self.send_header('Content-Length', len(frame))
self.end_headers()
self.wfile.write(frame)
self.wfile.write(b'\r\n')
except Exception as e:
logging.warning(
'Removed streaming client %s: %s',
self.client_address, str(e))
else:
self.send_error(404)
self.end_headers()
class StreamingServer(socketserver.ThreadingMixIn, server.HTTPServer):
allow_reuse_address = True
daemon_threads = True
class StreamingVideo:
def __init__ ( self, camera, resolution, language ):
self.camera = camera
self.resolution = resolution
self.lang = language
self._recording = False
self._streaming = False
@property
def recording ( self ):
return self._recording
@recording.setter
def recording ( self, val ):
if self._streaming:
if val:
if not self._recording:
self.camera.start_recording(self.output, format='mjpeg',
splitter_port=2)
elif self._recording:
self.camera.stop_recording(splitter_port=2)
self._recording = val
@property
def enable ( self ):
return self._streaming
@enable.setter
def enable ( self, val ):
if val: self.StartStream()
else: self.StopStream()
self._recording = val
'''
This function can only be called once.
TODO: How can we start/stop the server under program control?
'''
def StartStream ( self ):
if not self._streaming:
global output
self.output = StreamingOutput()
output = self.output
if self._recording:
self.camera.start_recording(self.output, format='mjpeg',splitter_port=2)
self.address = ('', 8000)
# Python2 equivalent
#def run(server_class=BaseHTTPServer.HTTPServer,
#handler_class=BaseHTTPServer.BaseHTTPRequestHandler):
#server_address = ('', 8000)
#httpd = server_class(server_address, handler_class)
#httpd.serve_forever()
self.server = StreamingServer(self.address, StreamingHandler)
self.server_thread = threading.Thread(target=self.server.serve_forever)
self.server_thread.daemon = True
self.server_thread.start()
self._streaming = True
'''
This function can only be called at program termination.
TODO: How can we start/stop the server under program control?
'''
def StopStream ( self ):
if self._streaming:
print("Shutdown server")
if self._recording:
self.camera.stop_recording(splitter_port=2)
self._recording = False
self.server.shutdown()
self._streaming = False