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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
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):
self._playing = True
self.set_state(Gst.State.PLAYING)
def pause(self):
self._playing = False
self.set_state(Gst.State.PAUSED)
def disable(self):
self._playing = False
self.set_state(Gst.State.NULL)
def make(self, elem, description=''):
element = Gst.ElementFactory.make(elem, description)
return element
class VideoPipeline(BasePipeline):
"""A Video Pipeline which can be used by a video test Source
"""
def __init__(
self,
port,
width=300,
height=200,
pattern=None,
timeoverlay=False,
clockoverlay=False):
super(VideoPipeline, self).__init__()
self.host = '127.0.0.1'
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):
element = self.make('videotestsrc', 'src')
element.set_property('pattern', int(pattern))
return element
def make_capsfilter(self, width, height):
element = self.make("capsfilter", "vfilter")
width = str(width)
height = str(height)
capsstring = "video/x-raw, format=(string)I420, "
"width=%s, height=%s".format(width, height)
caps = Gst.Caps.from_string(capsstring)
element.set_property('caps', caps)
return element
def make_gdppay(self):
element = self.make('gdppay', 'gdppay')
return element
def make_timeoverlay(self):
element = self.make('timeoverlay', 'timeoverlay')
element.set_property('font-desc', "Verdana bold 50")
return element
def make_clockoverlay(self):
element = self.make('clockoverlay', 'clockoverlay')
element.set_property('font-desc', "Verdana bold 50")
return element
def make_tcpclientsink(self, port):
element = self.make('tcpclientsink', 'tcpclientsink')
element.set_property('host', self.host)
element.set_property('port', int(port))
return element
class PreviewPipeline(BasePipeline):
"""docstring for PreviewPipeline"""
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)
def make_tcpclientsrc(self, port):
element = self.make('tcpclientsrc', 'tcpclientsrc')
element.set_property('host', self.host)
element.set_property('port', self.preview_port)
return element
def make_gdpdepay(self):
element = self.make('gdpdepay', 'gdpdepay')
return element
def make_autovideosink(self):
element = self.make('autovideosink', 'autovideosink')
return element
class VideoSrc(object):
"""A Test Video Source
"""
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
self.pipeline = VideoPipeline(
self.port,
self.width,
self.height,
self.pattern,
self.timeoverlay,
self.clockoverlay)
self.run()
def run(self):
self.pipeline.play()
def pause(self):
self.pipeline.pause()
def end(self):
self.pipeline.disable()
def generate_pattern(self, pattern):
"""Generates a random patern if not specified
"""
if pattern is None:
pattern = random.randint(0, 20)
pattern = str(pattern)
return pattern
class Preview(object):
"""docstring for Preview"""
def __init__(self, port):
super(Preview, self).__init__()
self.preview_port = int(port)
self.pipeline = PreviewPipeline(self.preview_port)
def run(self):
self.pipeline.play()
def pause(self):
self.pipeline.pause()
def end(self):
self.pipeline.disable()