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testsource.py
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testsource.py
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import gi
gi.require_version('Gst', '1.0')
from gi.repository import GObject, Gst
from exception import RangeError
import random
# from pipeline import *
#IMPORTS
GObject.threads_init()
Gst.init(None)
__all__ = ["Preview", "VideoSrc", ]
class BasePipeline(Gst.Pipeline):
"""A Basic pipeline
"""
def __init__(self):
super(BasePipeline, self).__init__()
Gst.Pipeline.__init__(self)
self._playing = False
def play(self):
"""Set the pipeline as playing"""
self._playing = True
self.set_state(Gst.State.PLAYING)
def pause(self):
"""Pause the pipeline"""
self._playing = False
self.set_state(Gst.State.PAUSED)
def disable(self):
"""Disable the pipeline"""
self._playing = False
self.set_state(Gst.State.NULL)
def make(self, elem, description=''):
"""Make a new gstreamer pipeline element
:param elem: The name of the element to be made
:param description: Description of the element to be made
returns: The element which is made
"""
element = Gst.ElementFactory.make(elem, description)
return element
class VideoPipeline(BasePipeline):
"""A Video Pipeline which can be used by a Video Test Source
:param port: The port of where the TCP stream will be sent
Should be same as video port of gst-switch-src
:param width: The width of the output video
:param height: The height of the output video
:param pattern: The videotestsrc pattern of the output video
:param timeoverlay: True to enable a running time over video
:param clockoverlay: True to enable current clock time over video
"""
def __init__(
self,
port,
host='127.0.0.1',
width=300,
height=200,
pattern=None,
timeoverlay=False,
clockoverlay=False):
super(VideoPipeline, self).__init__()
self.host = host
src = self.make_videotestsrc(pattern)
self.add(src)
vfilter = self.make_capsfilter(width, height)
self.add(vfilter)
src.link(vfilter)
gdppay = self.make_gdppay()
self.add(gdppay)
if timeoverlay:
_timeoverlay = self.make_timeoverlay()
if clockoverlay:
_clockoverlay = self.make_clockoverlay()
if timeoverlay and clockoverlay:
self.add(_timeoverlay)
self.add(_clockoverlay)
vfilter.link(_timeoverlay)
_timeoverlay.link(_clockoverlay)
_clockoverlay.link(gdppay)
if timeoverlay:
self.add(_timeoverlay)
vfilter.link(_timeoverlay)
_timeoverlay.link(gdppay)
if clockoverlay:
self.add(_clockoverlay)
vfilter.link(_clockoverlay)
_clockoverlay.link(gdppay)
else:
vfilter.link(gdppay)
sink = self.make_tcpclientsink(port)
self.add(sink)
gdppay.link(sink)
def make_videotestsrc(self, pattern):
"""Return a videotestsrc element
:param pattern: The video test source pattern (1-20)
:return: A video test source element
"""
element = self.make('videotestsrc', 'src')
element.set_property('pattern', int(pattern))
return element
def make_capsfilter(self, width, height):
"""Return a caps filter
:param width: The width of the caps
:param height: The height of the caps
:returns: A caps filter element
"""
element = self.make("capsfilter", "vfilter")
width = str(width)
height = str(height)
capsstring = "video/x-raw, format=(string)I420, width={0}, height={1}".format(width, height)
print capsstring
caps = Gst.Caps.from_string(capsstring)
element.set_property('caps', caps)
return element
def make_gdppay(self):
"""Return a gdppay element
:returns: A gdppay element
"""
element = self.make('gdppay', 'gdppay')
return element
def make_timeoverlay(self):
"""Return a time overlay element (Verdana bold 50)
:returns: a time overlay element
"""
element = self.make('timeoverlay', 'timeoverlay')
element.set_property('font-desc', "Verdana bold 50")
return element
def make_clockoverlay(self):
"""Return a clock overlay element (Verdana bold 50)
:returns: a clock overlay element
"""
element = self.make('clockoverlay', 'clockoverlay')
element.set_property('font-desc', "Verdana bold 50")
return element
def make_tcpclientsink(self, port):
"""Return a TCP client sink element
:port: Port to sink
:returns: A TCP client sink element
"""
element = self.make('tcpclientsink', 'tcpclientsink')
element.set_property('host', self.host)
element.set_property('port', int(port))
return element
class PreviewPipeline(BasePipeline):
"""Pipeline for usage by a Preview
:param port: The preview port
"""
def __init__(self, port):
super(PreviewPipeline, self).__init__()
self.host = '127.0.0.1'
self.preview_port = port
src = self.make_tcpclientsrc(port)
self.add(src)
gdpdepay = self.make_gdpdepay()
self.add(gdpdepay)
src.link(gdpdepay)
sink = self.make_autovideosink()
self.add(sink)
gdpdepay.link(sink)
@property
def preview_port(self):
return self._preview_port
@preview_port.setter
def preview_port(self, preview_port):
try:
port = int(preview_port)
if port < 1 or port > 65535:
raise RangeError("Preview Port: '{0}' must be in range 1 and 65535"
.format(preview_port))
else:
self._preview_port = preview_port
except TypeError:
raise TypeError("Preview Port: '{0}' must be a valid non negative integer"
.format(preview_port))
def make_tcpclientsrc(self, port):
"""Return a TCP Client Source element
:param port: The port of the server
:returns: A TCP Client Source element
"""
element = self.make('tcpclientsrc', 'tcpclientsrc')
element.set_property('host', self.host)
element.set_property('port', self.preview_port)
return element
def make_gdpdepay(self):
"""Return a gdpdepay element
:returns: A gdpdepay element
"""
element = self.make('gdpdepay', 'gdpdepay')
return element
def make_autovideosink(self):
"""Return a auto video sink element to show the video
:returns: A Auto Video Sink element
"""
element = self.make('autovideosink', 'autovideosink')
return element
class VideoSrc(object):
"""A Test Video Source
:param width: The width of the output video
:param height: The height of the output video
:param pattern: The videotestsrc pattern of the output video
None for random
:param timeoverlay: True to enable a running time over video
:param clockoverlay: True to enable current clock time over video
"""
HOST = '127.0.0.1'
def __init__(
self,
port,
width=300,
height=200,
pattern=None,
timeoverlay=False,
clockoverlay=False):
super(VideoSrc, self).__init__()
self.port = port
self.width = width
self.height = height
self.pattern = self.generate_pattern(pattern)
self.timeoverlay = timeoverlay
self.clockoverlay = clockoverlay
@property
def port(self):
return self._port
@port.setter
def port(self, port):
if not port:
raise ValueError("Port: '{0}' cannot be blank"
.format(port))
else:
try:
i = int(port)
if i < 1 or i > 65535:
raise RangeError('Port must be in range 1 to 65535')
else:
self._port = port
except TypeError:
raise TypeError("Port must be a string or number,"
"not, '{0}'".format(type(port)))
except ValueError:
raise TypeError("Port must be a valid number")
@property
def width(self):
return self._width
@width.setter
def width(self, width):
if not width:
raise ValueError("Width: '{0}' cannot be blank"
.format(width))
try:
i = float(width)
if i <= 0 :
raise ValueError("Width: '{0}' must be a valid positive value")
else:
self._width = width
except TypeError:
raise TypeError("Width must be a valid value not '{0}'"
.format(type(width)))
@property
def height(self):
return self._height
@height.setter
def height(self, height):
if not height:
raise ValueError("Height: '{0}' cannot be blank"
.format(height))
try:
i = float(height)
if i <= 0 :
raise ValueError("Height: '{0}' must be a valid positive value")
else:
self._height = height
except TypeError:
raise TypeError("Height must be a valid value not '{0}'"
.format(type(height)))
@property
def pattern(self):
return self._pattern
@pattern.setter
def pattern(self, pattern):
try:
i = int(float(pattern))
if i < 0 or i > 19:
raise RangeError('Pattern must be in range 0 and 19')
else:
self._pattern = pattern
except ValueError:
raise TypeError("Pattern must be a valid number")
@property
def timeoverlay(self):
return self._timeoverlay
@timeoverlay.setter
def timeoverlay(self, timeoverlay):
t = str(timeoverlay)
if t == 'True' or t == 'False':
self._timeoverlay = timeoverlay
else:
raise ValueError("Timeoverlay: '{0}' must be True of False"
.format(timeoverlay))
@property
def clockoverlay(self):
return self._clockoverlay
@clockoverlay.setter
def clockoverlay(self, clockoverlay):
t = str(clockoverlay)
if t == 'True' or t == 'False':
self._clockoverlay = clockoverlay
else:
raise ValueError("Clockoverlay: '{0}' must be True of False"
.format(clockoverlay))
def run(self):
"""Run the pipeline"""
self.pipeline = VideoPipeline(
self.port,
self.HOST,
self.width,
self.height,
self.pattern,
self.timeoverlay,
self.clockoverlay)
self.pipeline.play()
def pause(self):
"""End the pipeline"""
self.pipeline.pause()
def end(self):
"""End/disable the pipeline"""
self.pipeline.disable()
def generate_pattern(self, pattern):
"""Generate a random patern if not specified
"""
if pattern is None:
pattern = random.randint(0, 19)
pattern = str(pattern)
return pattern
class Preview(object):
"""A Preview Element
:param port: The preview port
"""
def __init__(self, port):
super(Preview, self).__init__()
self.preview_port = port
self.pipeline = PreviewPipeline(self.preview_port)
@property
def preview_port(self):
return self._preview_port
@preview_port.setter
def preview_port(self, preview_port):
try:
port = int(preview_port)
if port < 1 or port > 65535:
raise RangeError("Preview Port: '{0}' must be in range 1 and 65535"
.format(preview_port))
else:
self._preview_port = preview_port
except TypeError:
raise TypeError("Preview Port: '{0}' must be a valid non negative integer"
.format(preview_port))
def run(self):
"""Run the pipeline"""
self.pipeline.play()
def pause(self):
"""Pause the pipeline"""
self.pipeline.pause()
def end(self):
"""End/disable the pipeline"""
self.pipeline.disable()