mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-11-26 19:51:11 +00:00
d3a4c03c2b
Original commit message from CVS: * examples/pyidentity.py: * gst/common.h: * gst/gstpad.override: Implement pad query proxying so that python elements can answer pad queries. Fixes: #428299
68 lines
2.2 KiB
Python
68 lines
2.2 KiB
Python
#!/usr/bin/env python
|
|
|
|
import pygtk
|
|
pygtk.require ("2.0")
|
|
import gobject
|
|
gobject.threads_init()
|
|
|
|
import pygst
|
|
pygst.require('0.10')
|
|
import gst
|
|
|
|
class PyIdentity(gst.Element):
|
|
_sinkpadtemplate = gst.PadTemplate ("sink",
|
|
gst.PAD_SINK,
|
|
gst.PAD_ALWAYS,
|
|
gst.caps_new_any())
|
|
_srcpadtemplate = gst.PadTemplate ("src",
|
|
gst.PAD_SRC,
|
|
gst.PAD_ALWAYS,
|
|
gst.caps_new_any())
|
|
|
|
def __init__(self):
|
|
gst.Element.__init__(self)
|
|
|
|
self.sinkpad = gst.Pad(self._sinkpadtemplate, "sink")
|
|
self.sinkpad.set_chain_function(self.chainfunc)
|
|
self.sinkpad.set_event_function(self.eventfunc)
|
|
self.sinkpad.set_getcaps_function(gst.Pad.proxy_getcaps)
|
|
self.sinkpad.set_setcaps_function(gst.Pad.proxy_setcaps)
|
|
self.add_pad (self.sinkpad)
|
|
|
|
self.srcpad = gst.Pad(self._srcpadtemplate, "src")
|
|
|
|
self.srcpad.set_event_function(self.srceventfunc)
|
|
self.srcpad.set_query_function(self.srcqueryfunc)
|
|
self.srcpad.set_getcaps_function(gst.Pad.proxy_getcaps)
|
|
self.srcpad.set_setcaps_function(gst.Pad.proxy_setcaps)
|
|
self.add_pad (self.srcpad)
|
|
|
|
def chainfunc(self, pad, buffer):
|
|
gst.log ("Passing buffer with ts %d" % (buffer.timestamp))
|
|
return self.srcpad.push (buffer)
|
|
|
|
def eventfunc(self, pad, event):
|
|
return self.srcpad.push_event (event)
|
|
|
|
def srcqueryfunc (self, pad, query):
|
|
return self.sinkpad.query (query)
|
|
def srceventfunc (self, pad, event):
|
|
return self.sinkpad.push_event (event)
|
|
|
|
gobject.type_register(PyIdentity)
|
|
|
|
pipe = gst.Pipeline()
|
|
vt = gst.element_factory_make ("videotestsrc")
|
|
i1 = PyIdentity()
|
|
color = gst.element_factory_make ("ffmpegcolorspace")
|
|
scale = gst.element_factory_make ("videoscale")
|
|
q1 = gst.element_factory_make ("queue")
|
|
i2 = PyIdentity()
|
|
sink = gst.element_factory_make ("autovideosink")
|
|
|
|
pipe.add (vt, i1, q1, i2, color, scale, sink)
|
|
gst.element_link_many (vt, i1, q1, i2, color, scale, sink)
|
|
|
|
pipe.set_state (gst.STATE_PLAYING)
|
|
|
|
gobject.MainLoop().run()
|