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examples: Port the sink example to GstBaseSink

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Also we now need to explicitly call Gst.init() from python bindings.
This commit is contained in:
Thibault Saunier 2015-10-27 22:19:19 +01:00
parent 1f26b4ad2b
commit 7dffdb6864
1 changed files with 13 additions and 26 deletions
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39
examples/plugins/python/sinkelement.py
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@ -11,42 +11,29 @@
# in 20 lines in python and place into the gstreamer registry # in 20 lines in python and place into the gstreamer registry
# so it can be autoplugged or used from parse_launch. # so it can be autoplugged or used from parse_launch.
# #
# Run this script with GST_DEBUG=python:5 to see the debug # You can run the example from the source doing from gst-python/:
# messages #
# $ export GST_PLUGIN_PATH=$GST_PLUGIN_PATH:$PWD/plugin:$PWD/examples/plugins
# $ GST_DEBUG=python:4 gst-launch-1.0 fakesrc num-buffers=10 ! mysink
from gi.repository import Gst, GObject from gi.repository import Gst, GObject, GstBase
Gst.init(None)
# #
# Simple Sink element created entirely in python # Simple Sink element created entirely in python
# #
class MySink(Gst.Element): class MySink(GstBase.BaseSink):
__gstmetadata__ = ('CustomSink','Sink', \ __gstmetadata__ = ('CustomSink','Sink', \
'Custom test sink element', 'Edward Hervey') 'Custom test sink element', 'Edward Hervey')
__gsttemplates__ = Gst.PadTemplate.new ("sinkpadtemplate", __gsttemplates__ = Gst.PadTemplate.new("sink",
Gst.PadDirection.SINK, Gst.PadDirection.SINK,
Gst.PadPresence.ALWAYS, Gst.PadPresence.ALWAYS,
Gst.Caps.new_any()) Gst.Caps.new_any())
def __init__(self): def do_render(self, buffer):
Gst.Element.__init__(self) Gst.info("timestamp(buffer):%s" % (Gst.TIME_ARGS(buffer.pts)))
Gst.info('creating sinkpad')
self.sinkpad = Gst.Pad.new_from_template(self.__gsttemplates__, "sink")
Gst.info('adding sinkpad to self')
self.add_pad(self.sinkpad)
Gst.info('setting chain/event functions')
self.sinkpad.set_chain_function(self.chainfunc)
self.sinkpad.set_event_function(self.eventfunc)
st = Gst.Structure.from_string("yes,fps=1/2")[0]
def chainfunc(self, pad, buffer):
Gst.info("%s timestamp(buffer):%d" % (pad, buffer.pts))
return Gst.FlowReturn.OK return Gst.FlowReturn.OK
def eventfunc(self, pad, event):
Gst.info("%s event:%r" % (pad, event.type))
return True
GObject.type_register(MySink) GObject.type_register(MySink)
__gstelementfactory__ = ("mysink", Gst.Rank.NONE, MySink) __gstelementfactory__ = ("mysink", Gst.Rank.NONE, MySink)