X-Git-Url: https://git.toastfreeware.priv.at/toast/stream2beamer.git/blobdiff_plain/73fc7271463f53878788d77ca45f954f942c5853..b528286b88f14a0e9baadd9f8c871677156900fe:/lagarde.py?ds=inline diff --git a/lagarde.py b/lagarde.py index 08c37b0..faf833f 100755 --- a/lagarde.py +++ b/lagarde.py @@ -1,18 +1,14 @@ #!/usr/bin/python3 - import argparse import asyncio -import datetime import json import logging -import pathlib import ssl -import sys +import queue from typing import Optional, List -import websockets - import gi +import websockets gi.require_version('Gst', '1.0') from gi.repository import Gst @@ -23,27 +19,148 @@ from gi.repository import GstWebRTC gi.require_version('GstSdp', '1.0') from gi.repository import GstSdp +gi.require_version('GstRtspServer', '1.0') +from gi.repository import Gst, GstRtspServer, GObject, GLib + log = logging.getLogger(__name__) -class Lagarde: +class RtspServer: def __init__(self): - self.sdp_offer: Optional[str] = None - self.websocket: Optional[websockets.client.WebSocketClientProtocol] = None + server = GstRtspServer.RTSPServer() + server.set_address("::") + server.set_service('8554') # port as string + factory = GstRtspServer.RTSPMediaFactory() + # factory.set_launch("intervideosrc ! decodebin ! theoraenc ! queue ! rtptheorapay name=pay0") + # factory.set_launch("intervideosrc ! decodebin ! videoconvert ! video/x-raw,format=I420 ! theoraenc ! queue ! rtptheorapay name=pay0") + # factory.set_launch("intervideosrc ! decodebin ! videorate ! videoconvert ! video/x-raw,format=I420,framerate=10/1 ! theoraenc ! queue ! rtptheorapay name=pay0") + # factory.set_launch("intervideosrc ! decodebin ! videoconvert ! video/x-raw,format=I420 ! x264enc ! queue ! rtph264pay pt=96 name=pay0") + factory.set_launch("intervideosrc ! decodebin ! x264enc ! queue ! rtph264pay pt=96 name=pay0") + # factory.set_launch("intervideosrc ! decodebin ! videorate ! videoconvert ! video/x-raw,framerate=10/1 ! x264enc ! queue ! rtph264pay pt=96 name=pay0") + factory.set_shared(True) + mountPoints = server.get_mount_points() + mountPoints.add_factory("/cug", factory) + server.attach() + self.server = server + + +class Events: + def __init__(self): + self.sdp_offer = queue.Queue() + self.sdp_answer = queue.Queue() + self.generated_ice_candidates = queue.Queue() + self.received_ice_candidates = queue.Queue() + self.sdp_info = queue.Queue() # (sdp_mids, user_fragments) + self.room_left = queue.Queue() + + +class SignalingClient: + def __init__(self, events: Events, uri): + self.events = events + self.uri = uri + self.ssl_context = ssl.SSLContext() + self.ssl_context.check_hostname = False + self.ssl_context.verify_mode = ssl.CERT_NONE self.session_id = None - self.received_ice_candidates = [] - self.generated_ice_candidates = [] - self.user_fragments: Optional[List] = None - self.mids: Optional[List] = None - self.pipe = None - self.webrtcbin = None + + async def receive(self, uri): + async for msg in self.websocket: + msg_json = json.loads(msg) + msg_type = msg_json['Type'] + msg_value = msg_json['Value'] + assert self.session_id is None or self.session_id == msg_json['SessionID'] + if msg_type == 'newSession': + self.session_id = msg_json['SessionID'] + log.info(f"New session {self.session_id}") + elif msg_type == 'gotOffer': + value_json = json.loads(msg_value) + sdp = value_json['sdp'] + log.info(f'Got SDP offer') + log.debug(f'SDP offer:\n{sdp}') + self.events.sdp_offer.put_nowait(sdp) + elif msg_type == 'addCallerIceCandidate': + value_json = json.loads(msg_value) + log.info(f'Got ICE candidate') + log.debug(f'ICE candidate: {value_json}') + self.events.received_ice_candidates.put_nowait(value_json) + elif msg_type == 'roomNotFound': + log.error(f'The room was not found: {uri}') + return + elif msg_type == 'roomClosed': + log.info(f'Oh noes, the room went away (session {self.session_id})!') + self.events.room_left.put_nowait(True) + return + else: + log.error(f'Unknown message type {msg_type}') + + async def send(self): + sdp_mids = None + user_fragments = None + while True: + if self.events.sdp_answer.qsize() > 0: + sdp_answer = self.events.sdp_answer.get_nowait() + sdp_answer_msg = json.dumps({ + 'SessionID': self.session_id, + 'Type': "gotAnswer", + 'Value': json.dumps({ + 'type': 'answer', + 'sdp': sdp_answer + }) + }) + await self.websocket.send(sdp_answer_msg) + + elif self.events.sdp_info.qsize() > 0: + sdp_mids, user_fragments = self.events.sdp_info.get_nowait() + + elif self.events.generated_ice_candidates.qsize() > 0 \ + and sdp_mids is not None and user_fragments is not None: + mlineindex, candidate = self.events.generated_ice_candidates.get_nowait() + sdp_mid = sdp_mids[mlineindex] + user_fragment = user_fragments[mlineindex] + icemsg_value = json.dumps({ + "candidate": candidate, + "sdpMid": sdp_mid, + "sdpMLineIndex": mlineindex, + "usernameFragment": user_fragment, + }) + icemsg = json.dumps({ + 'SessionID': self.session_id, + 'Type': 'addCalleeIceCandidate', + 'Value': icemsg_value, + }) + log.info(f'Send ICE candidate') + log.debug(f'ICE candidate: {icemsg_value}') + await self.websocket.send(icemsg) + + else: + await asyncio.sleep(0.2) + + async def run(self): + self.session_id = None + async with websockets.connect(self.uri, ssl=self.ssl_context, close_timeout=0.5) as self.websocket: + receive_task = asyncio.Task(self.receive(self.uri)) + send_task = asyncio.Task(self.send()) + done, pending = await asyncio.wait([receive_task, send_task], return_when=asyncio.FIRST_COMPLETED) + for task in pending: + task.cancel() + + +class WebRTCClient: + def __init__(self, events: Events): + self.events = events + self.webrtcbin = Gst.ElementFactory.make('webrtcbin', 'laplace') + self.pipe = Gst.Pipeline.new("pipeline") + Gst.Bin.do_add_element(self.pipe, self.webrtcbin) + self.webrtcbin.connect('on-negotiation-needed', self.on_negotiation_needed) + self.webrtcbin.connect('on-ice-candidate', self.on_ice_candidate) + self.webrtcbin.connect('pad-added', self.webrtcbin_pad_added) def on_negotiation_needed(self, element): log.info('on_negotiation_needed') def on_ice_candidate(self, element, mlineindex, candidate): log.info('on_ice_candidate') - self.generated_ice_candidates.append((mlineindex, candidate)) + self.events.generated_ice_candidates.put_nowait((mlineindex, candidate)) def webrtcbin_pad_added(self, element, pad): log.info('webrtcbin_pad_added') @@ -62,18 +179,17 @@ class Lagarde: return caps = pad.get_current_caps() - # assert (len(caps)) # we have a Gst.Caps object and it has no length - # s = caps[0] # also, it's not a list padsize = caps.get_size() - assert(padsize > 0) - for i in range(padsize): # pythonic?! - s = caps.get_structure(i) # Gst.Structure + for i in range(padsize): + s = caps.get_structure(i) # Gst.Structure name = s.get_name() if name.startswith('video'): q = Gst.ElementFactory.make('queue') conv = Gst.ElementFactory.make('videoconvert') - sink = Gst.ElementFactory.make('autovideosink') - self.pipe.add(q, conv, sink) + sink = Gst.ElementFactory.make('intervideosink') + self.pipe.add(q) + self.pipe.add(conv) + self.pipe.add(sink) self.pipe.sync_children_states() pad.link(q.get_static_pad('sink')) q.link(conv) @@ -83,135 +199,117 @@ class Lagarde: conv = Gst.ElementFactory.make('audioconvert') resample = Gst.ElementFactory.make('audioresample') sink = Gst.ElementFactory.make('autoaudiosink') - self.pipe.add(q, conv, resample, sink) + self.pipe.add(q) + self.pipe.add(conv) + self.pipe.add(resample) + self.pipe.add(sink) self.pipe.sync_children_states() pad.link(q.get_static_pad('sink')) q.link(conv) conv.link(resample) resample.link(sink) - async def listen_to_gstreamer_bus(self): - Gst.init(None) - self.webrtcbin = Gst.ElementFactory.make('webrtcbin', 'laplace') - self.pipe = Gst.Pipeline.new("pipeline") - Gst.Bin.do_add_element(self.pipe, self.webrtcbin) + def set_remote_desciption_done(self, gst_promise): + gst_promise = Gst.Promise.new_with_change_func(self.create_answer_done) + self.webrtcbin.emit('create-answer', None, gst_promise) + + def create_answer_done(self, gst_promise): + reply = gst_promise.get_reply() + answer = reply.get_value('answer') + sdp_message = answer.sdp + mids = [sdp_message.get_media(i).get_attribute_val('mid') + for i in range(sdp_message.medias_len())] + user_fragments = [sdp_message.get_media(i).get_attribute_val('ice-ufrag') + for i in range(sdp_message.medias_len())] + self.events.sdp_info.put_nowait((mids, user_fragments)) + sdp_answer = sdp_message.as_text() + log.info(f'Send SDP answer') + log.debug(f'SDP answer:\n{sdp_answer}') + self.events.sdp_answer.put_nowait(sdp_answer) + gst_promise = Gst.Promise.new_with_change_func(self.set_local_description_done) + self.webrtcbin.emit('set-local-description', answer, gst_promise) + + def set_local_description_done(self, gst_promise): + gst_promise.get_reply() + + async def run(self): bus = Gst.Pipeline.get_bus(self.pipe) - self.webrtcbin.connect('on-negotiation-needed', self.on_negotiation_needed) - self.webrtcbin.connect('on-ice-candidate', self.on_ice_candidate) - self.webrtcbin.connect('pad-added', self.webrtcbin_pad_added) self.pipe.set_state(Gst.State.PLAYING) try: while True: if bus.have_pending(): - msg = bus.pop() # Gst.Message, has to be unref'ed. - if msg.type != Gst.MessageType.STATE_CHANGED: - # log.info(f'Receive Gst.Message: {msg.type}, {msg.seqnum}, {msg.get_structure()}') - # log.info(f'{webrtcbin.props.signaling_state} {webrtcbin.props.ice_gathering_state} {webrtcbin.props.ice_connection_state}') - # Gst.Message.unref(msg) - pass - elif self.sdp_offer is not None: + msg = bus.pop() + if msg.type == Gst.MessageType.ERROR: + log.error(f'Error from gstreamer message bus: {msg.get_structure()}') + return + elif msg.type == Gst.MessageType.EOS: # end of stream + log.info(f'Gstreamer message bus reports end of stream') + return + elif self.events.sdp_offer.qsize() > 0: + sdp_offer = self.events.sdp_offer.get_nowait() res, sm = GstSdp.SDPMessage.new() assert res == GstSdp.SDPResult.OK - GstSdp.sdp_message_parse_buffer(bytes(self.sdp_offer.encode()), sm) + GstSdp.sdp_message_parse_buffer(bytes(sdp_offer.encode()), sm) # the three lines above can also be done this way in new versions of GStreamer: # sm = GstSdp.SDPMessage.new_from_text(sdp_offer) rd = GstWebRTC.WebRTCSessionDescription.new(GstWebRTC.WebRTCSDPType.OFFER, sm) - gst_promise = Gst.Promise.new() + gst_promise = Gst.Promise.new_with_change_func(self.set_remote_desciption_done) self.webrtcbin.emit('set-remote-description', rd, gst_promise) - gst_promise.wait() - self.sdp_offer = None - - log.info('create-answer') - gst_promise = Gst.Promise.new() - self.webrtcbin.emit('create-answer', None, gst_promise) - result = gst_promise.wait() - assert result == Gst.PromiseResult.REPLIED - reply = gst_promise.get_reply() - answer = reply.get_value('answer') - sdp_message = answer.sdp - self.user_fragments = [sdp_message.get_media(i).get_attribute_val('ice-ufrag') - for i in range(sdp_message.medias_len())] - self.mids = [sdp_message.get_media(i).get_attribute_val('mid') - for i in range(sdp_message.medias_len())] - sdp_answer = sdp_message.as_text() - log.info(sdp_answer) - sdp_answer_msg = json.dumps({ - 'SessionID': self.session_id, - 'Type': "gotAnswer", - 'Value': json.dumps({ - 'type': 'answer', - 'sdp': sdp_answer - }) - }) - gst_promise = Gst.Promise.new() - self.webrtcbin.emit('set-local-description', answer, gst_promise) - gst_promise.wait() - gst_promise.get_reply() - await self.websocket.send(sdp_answer_msg) - - elif len(self.received_ice_candidates) > 0: - ic = self.received_ice_candidates.pop(0) + + elif self.events.received_ice_candidates.qsize() > 0: + ic = self.events.received_ice_candidates.get_nowait() if ic['candidate'] != '': self.webrtcbin.emit('add-ice-candidate', ic['sdpMLineIndex'], ic['candidate']) - elif len(self.generated_ice_candidates) > 0: - mlineindex, candidate = self.generated_ice_candidates.pop(0) - icemsg = json.dumps({ - 'SessionID': self.session_id, - 'Type': 'addCalleeIceCandidate', - 'Value': json.dumps({ - "candidate": candidate, - "sdpMid": self.mids[mlineindex], - "sdpMLineIndex": mlineindex, - "usernameFragment": self.user_fragments[mlineindex], - }) - }) - log.info(f'send_ice_candidate_message with {icemsg}') - await self.websocket.send(icemsg) + elif self.events.room_left.qsize() > 0: + self.events.room_left.get_nowait() + return else: await asyncio.sleep(0.1) finally: self.pipe.set_state(Gst.State.NULL) - async def talk_to_websocket(self, uri): - ssl_context = ssl.SSLContext() - ssl_context.check_hostname = False - ssl_context.verify_mode = ssl.CERT_NONE - async with websockets.connect(uri, ssl=ssl_context) as self.websocket: - async for msg in self.websocket: - msg_json = json.loads(msg) - msg_type = msg_json['Type'] - msg_value = msg_json['Value'] - self.session_id = msg_json['SessionID'] - log.info(f"receive for session {self.session_id} type {msg_type}") - if msg_type == 'newSession': - pass - elif msg_type == 'gotOffer': - value_json = json.loads(msg_value) - sdp = value_json['sdp'] - log.info(f'SDP: {sdp}') - self.sdp_offer = sdp - elif msg_type == 'addCallerIceCandidate': - value_json = json.loads(msg_value) - log.info(f'ICE: {value_json}') - self.received_ice_candidates.append(value_json) - elif msg_type == 'roomClosed': - log.info('Oh noes, the room went away!') - # and here we should clean up - else: - log.error(f'Unknown message type {msg_type}') - async def run(self, uri): - talk_to_websocket_task = asyncio.Task(self.talk_to_websocket(uri)) - listen_to_gstreamer_bus_task = asyncio.Task(self.listen_to_gstreamer_bus()) - done, pending = await asyncio.wait( - [talk_to_websocket_task, listen_to_gstreamer_bus_task], +async def gstreamer_main_loop(): + """Does the equivalent of the following lines in an async friendly way: + loop = GLib.MainLoop() + loop.run() + """ + gst_loop = GLib.MainLoop() + context = gst_loop.get_context() + while True: + events_dispatched = context.iteration(False) + await asyncio.sleep(0. if events_dispatched else 0.01) + + +async def run_repeated(task): + while True: + await task() + await asyncio.sleep(0.1) + + +async def run(uri): + try: + events = Events() + + rtsp = RtspServer() + webrtc = WebRTCClient(events) + signaling = SignalingClient(events, uri) + + main_loop_task = asyncio.Task(gstreamer_main_loop()) + webrtc_task = asyncio.Task(run_repeated(webrtc.run)) + signaling_task = asyncio.Task(run_repeated(signaling.run)) + + done, pending = await asyncio.wait([main_loop_task, webrtc_task, signaling_task], return_when=asyncio.FIRST_COMPLETED) - for d in done: - d.result() - for p in pending: - p.cancel() + + for task in done: + task.result() + for task in pending: + task.cancel() + except OSError as e: + print(e) def main(): @@ -220,8 +318,9 @@ def main(): parser.add_argument('--uri', default='wss://localhost:1234/ws_connect?id=cug', help='Signalling server URI') args = parser.parse_args() - lagarde = Lagarde() - asyncio.run(lagarde.run(args.uri), debug=True) + + Gst.init(None) + asyncio.run(run(args.uri), debug=True) if __name__ == '__main__':