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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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77 lines
3.5 KiB
Python
77 lines
3.5 KiB
Python
#!/usr/bin/env python3
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#
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# Copyright (c) 2018, Matthew Waters <matthew@centricular.com>
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU Lesser General Public
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# License as published by the Free Software Foundation; either
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# version 2.1 of the License, or (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public
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# License along with this program; if not, write to the
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# Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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# Boston, MA 02110-1301, USA.
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import gi
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gi.require_version("GstValidate", "1.0")
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from gi.repository import GstValidate
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from observer import Signal
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class ActionObserver(object):
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def __init__(self):
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def _action_continue(val):
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return val not in [GstValidate.ActionReturn.ERROR, GstValidate.ActionReturn.ERROR_REPORTED]
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def _action_accum(previous, val):
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# we want to always keep any errors propagated
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if val in [GstValidate.ActionReturn.ERROR, GstValidate.ActionReturn.ERROR_REPORTED]:
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return val
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if previous in [GstValidate.ActionReturn.ERROR, GstValidate.ActionReturn.ERROR_REPORTED]:
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return previous
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# we want to always prefer async returns
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if previous in [GstValidate.ActionReturn.ASYNC, GstValidate.ActionReturn.INTERLACED]:
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return previous
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if val in [GstValidate.ActionReturn.ASYNC, GstValidate.ActionReturn.INTERLACED]:
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return val
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return val
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self.create_offer = Signal(_action_continue, _action_accum)
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self.wait_for_negotiation_state = Signal(_action_continue, _action_accum)
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self.add_stream = Signal(_action_continue, _action_accum)
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self.wait_for_remote_state = Signal(_action_continue, _action_accum)
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def _create_offer(self, scenario, action):
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print("action create-offer")
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return self.create_offer.fire()
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def _wait_for_negotiation_state(self, scenario, action):
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state = action.structure["state"]
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print("action wait-for-negotiation-state", state)
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return self.wait_for_negotiation_state.fire(state)
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def _add_stream(self, scenario, action):
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pipeline = action.structure["pipeline"]
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print("action add-stream", pipeline)
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return self.add_stream.fire(pipeline)
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def register_action_types(observer):
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if not isinstance(observer, ActionObserver):
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raise TypeError
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GstValidate.register_action_type("create-offer", "webrtc",
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observer._create_offer, None,
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"Instruct a create-offer to commence",
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GstValidate.ActionTypeFlags.NONE)
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GstValidate.register_action_type("wait-for-negotiation-state", "webrtc",
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observer._wait_for_negotiation_state, None,
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"Wait for a specific negotiation state to be reached",
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GstValidate.ActionTypeFlags.NONE)
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GstValidate.register_action_type("add-stream", "webrtc",
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observer._add_stream, None,
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"Add a stream to the webrtcbin",
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GstValidate.ActionTypeFlags.NONE)
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