Mercurial > libervia-backend
annotate libervia/backend/plugins/plugin_xep_0167/mapping.py @ 4189:04cd749de818
docker (backend-dev-demo): command renaming + add a bookmark to avoid empty chat
author | Goffi <goffi@goffi.org> |
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date | Mon, 11 Dec 2023 00:54:01 +0100 |
parents | b2709504586a |
children | e11b13418ba6 |
rev | line source |
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1 #!/usr/bin/env python3 |
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2 |
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3 # Libervia: an XMPP client |
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4 # Copyright (C) 2009-2023 Jérôme Poisson (goffi@goffi.org) |
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5 |
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6 # This program is free software: you can redistribute it and/or modify |
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7 # it under the terms of the GNU Affero General Public License as published by |
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8 # the Free Software Foundation, either version 3 of the License, or |
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9 # (at your option) any later version. |
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10 |
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11 # This program is distributed in the hope that it will be useful, |
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12 # but WITHOUT ANY WARRANTY; without even the implied warranty of |
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13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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14 # GNU Affero General Public License for more details. |
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15 |
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16 # You should have received a copy of the GNU Affero General Public License |
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17 # along with this program. If not, see <http://www.gnu.org/licenses/>. |
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18 |
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19 import base64 |
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20 from typing import Any, Dict, Optional |
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21 |
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22 from twisted.words.xish import domish |
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23 |
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24 from libervia.backend.core.constants import Const as C |
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25 from libervia.backend.core.log import getLogger |
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26 |
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27 from .constants import NS_JINGLE_RTP |
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28 |
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29 log = getLogger(__name__) |
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30 |
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31 host = None |
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32 |
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33 |
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34 def senders_to_sdp(senders: str, session: dict) -> str: |
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35 """Returns appropriate SDP attribute corresponding to Jingle senders attribute""" |
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36 if senders == "both": |
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37 return "a=sendrecv" |
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38 elif senders == "none": |
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39 return "a=inactive" |
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40 elif session["role"] == senders: |
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41 return "a=sendonly" |
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42 else: |
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43 return "a=recvonly" |
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44 |
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45 |
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46 def generate_sdp_from_session( |
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47 session: dict, local: bool = False, port: int = 9 |
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48 ) -> str: |
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49 """Generate an SDP string from session data. |
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50 |
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51 @param session: A dictionary containing the session data. It should have the |
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52 following structure: |
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53 |
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54 { |
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55 "contents": { |
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56 "<content_id>": { |
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57 "application_data": { |
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58 "media": <str: "audio" or "video">, |
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59 "local_data": <media_data dict>, |
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60 "peer_data": <media_data dict>, |
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61 ... |
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62 }, |
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63 "transport_data": { |
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64 "local_ice_data": <ice_data dict>, |
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65 "peer_ice_data": <ice_data dict>, |
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66 ... |
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67 }, |
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68 ... |
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69 }, |
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70 ... |
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71 } |
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72 } |
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73 @param local: A boolean value indicating whether to generate SDP for the local or |
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74 peer entity. If True, the method will generate SDP for the local entity, |
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75 otherwise for the peer entity. Generally the local SDP is received from frontends |
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76 and not needed in backend, except for debugging purpose. |
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77 @param port: The preferred port for communications. |
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78 |
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79 @return: The generated SDP string. |
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80 """ |
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81 contents = session["contents"] |
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82 sdp_lines = ["v=0"] |
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83 |
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84 # Add originator (o=) line after the version (v=) line |
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85 username = base64.b64encode(session["local_jid"].full().encode()).decode() |
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86 session_id = "1" # Increment this for each session |
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87 session_version = "1" # Increment this when the session is updated |
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88 network_type = "IN" |
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89 address_type = "IP4" |
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90 connection_address = "0.0.0.0" |
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91 o_line = ( |
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92 f"o={username} {session_id} {session_version} {network_type} {address_type} " |
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93 f"{connection_address}" |
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94 ) |
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95 sdp_lines.append(o_line) |
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96 |
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97 # Add the mandatory "s=" and t=" lines |
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98 sdp_lines.append("s=-") |
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99 sdp_lines.append("t=0 0") |
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100 |
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101 # stream direction |
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102 all_senders = {c["senders"] for c in session["contents"].values()} |
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103 # if we don't have a common senders for all contents, we set them at media level |
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104 senders = all_senders.pop() if len(all_senders) == 1 else None |
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105 |
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106 sdp_lines.append("a=msid-semantic:WMS *") |
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107 sdp_lines.append("a=ice-options:trickle") |
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108 |
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109 host.trigger.point( |
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110 "XEP-0167_generate_sdp_session", |
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111 session, |
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112 local, |
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113 sdp_lines, |
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114 triggers_no_cancel=True |
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115 ) |
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116 |
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117 for content_name, content_data in contents.items(): |
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118 app_data_key = "local_data" if local else "peer_data" |
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119 application_data = content_data["application_data"] |
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120 media_data = application_data[app_data_key] |
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121 media = application_data["media"] |
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122 payload_types = media_data.get("payload_types", {}) |
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123 |
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124 # Generate m= line |
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125 transport = "UDP/TLS/RTP/SAVPF" |
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126 payload_type_ids = [str(pt_id) for pt_id in payload_types] |
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127 m_line = f"m={media} {port} {transport} {' '.join(payload_type_ids)}" |
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128 sdp_lines.append(m_line) |
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129 |
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130 sdp_lines.append(f"c={network_type} {address_type} {connection_address}") |
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131 |
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132 sdp_lines.append(f"a=mid:{content_name}") |
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133 if senders is not None: |
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134 sdp_lines.append(senders_to_sdp(senders, session)) |
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135 |
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136 # stream direction |
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137 if senders is None: |
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138 sdp_lines.append(senders_to_sdp(content_data["senders"], session)) |
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139 |
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140 |
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141 # Generate a= lines for rtpmap and fmtp |
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142 for pt_id, pt in payload_types.items(): |
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143 name = pt["name"] |
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144 clockrate = pt.get("clockrate", "") |
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145 |
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146 # Check if "channels" is in pt and append it to the line |
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147 channels = pt.get("channels") |
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148 if channels: |
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149 sdp_lines.append(f"a=rtpmap:{pt_id} {name}/{clockrate}/{channels}") |
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150 else: |
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151 sdp_lines.append(f"a=rtpmap:{pt_id} {name}/{clockrate}") |
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152 |
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153 if "ptime" in pt: |
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154 sdp_lines.append(f"a=ptime:{pt['ptime']}") |
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155 |
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156 if "parameters" in pt: |
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157 fmtp_params = ";".join([f"{k}={v}" for k, v in pt["parameters"].items()]) |
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158 sdp_lines.append(f"a=fmtp:{pt_id} {fmtp_params}") |
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159 |
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160 if "bandwidth" in media_data: |
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161 sdp_lines.append(f"a=b:{media_data['bandwidth']}") |
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162 |
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163 if media_data.get("rtcp-mux"): |
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164 sdp_lines.append("a=rtcp-mux") |
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165 |
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166 # Generate a= lines for fingerprint, ICE ufrag, pwd and candidates |
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167 ice_data_key = "local_ice_data" if local else "peer_ice_data" |
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168 ice_data = content_data["transport_data"][ice_data_key] |
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169 |
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170 if "fingerprint" in ice_data: |
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171 fingerprint_data = ice_data["fingerprint"] |
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172 sdp_lines.append( |
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173 f"a=fingerprint:{fingerprint_data['hash']} " |
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174 f"{fingerprint_data['fingerprint']}" |
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175 ) |
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176 sdp_lines.append(f"a=setup:{fingerprint_data['setup']}") |
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177 |
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178 sdp_lines.append(f"a=ice-ufrag:{ice_data['ufrag']}") |
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179 sdp_lines.append(f"a=ice-pwd:{ice_data['pwd']}") |
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180 |
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181 for candidate in ice_data["candidates"]: |
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182 foundation = candidate["foundation"] |
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183 component_id = candidate["component_id"] |
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184 transport = candidate["transport"] |
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185 priority = candidate["priority"] |
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186 address = candidate["address"] |
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187 candidate_port = candidate["port"] |
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188 candidate_type = candidate["type"] |
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189 |
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190 candidate_line = ( |
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191 f"a=candidate:{foundation} {component_id} {transport} {priority} " |
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192 f"{address} {candidate_port} typ {candidate_type}" |
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193 ) |
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194 |
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195 if "rel_addr" in candidate and "rel_port" in candidate: |
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196 candidate_line += ( |
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197 f" raddr {candidate['rel_addr']} rport {candidate['rel_port']}" |
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198 ) |
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199 |
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200 if "generation" in candidate: |
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201 candidate_line += f" generation {candidate['generation']}" |
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202 |
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203 if "network" in candidate: |
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204 candidate_line += f" network {candidate['network']}" |
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205 |
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206 sdp_lines.append(candidate_line) |
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207 |
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208 # Generate a= lines for encryption |
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209 if "encryption" in media_data: |
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210 for enc_data in media_data["encryption"]: |
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211 crypto_suite = enc_data["crypto-suite"] |
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212 key_params = enc_data["key-params"] |
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213 session_params = enc_data.get("session-params", "") |
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214 tag = enc_data["tag"] |
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215 |
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216 crypto_line = f"a=crypto:{tag} {crypto_suite} {key_params}" |
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217 if session_params: |
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218 crypto_line += f" {session_params}" |
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219 sdp_lines.append(crypto_line) |
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220 |
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221 |
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222 host.trigger.point( |
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223 "XEP-0167_generate_sdp_content", |
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224 session, |
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225 local, |
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226 content_name, |
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227 content_data, |
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228 sdp_lines, |
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229 application_data, |
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230 app_data_key, |
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231 media_data, |
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232 media, |
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233 triggers_no_cancel=True |
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234 ) |
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235 |
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236 # Combine SDP lines and return the result |
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237 return "\r\n".join(sdp_lines) + "\r\n" |
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238 |
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239 |
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240 def parse_sdp(sdp: str) -> dict: |
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241 """Parse SDP string. |
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242 |
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243 @param sdp: The SDP string to parse. |
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244 |
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245 @return: A dictionary containing parsed session data. |
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246 """ |
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247 # FIXME: to be removed once host is accessible from global var |
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248 assert host is not None |
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249 lines = sdp.strip().split("\r\n") |
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250 # session metadata |
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251 metadata: Dict[str, Any] = {} |
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252 call_data = {"metadata": metadata} |
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253 |
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254 media_type = None |
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255 media_data: Optional[Dict[str, Any]] = None |
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256 application_data: Optional[Dict[str, Any]] = None |
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257 transport_data: Optional[Dict[str, Any]] = None |
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258 fingerprint_data: Optional[Dict[str, str]] = None |
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259 ice_pwd: Optional[str] = None |
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260 ice_ufrag: Optional[str] = None |
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261 payload_types: Optional[Dict[int, dict]] = None |
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262 |
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263 for line in lines: |
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264 try: |
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265 parts = line.split() |
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266 prefix = parts[0][:2] # Extract the 'a=', 'm=', etc., prefix |
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267 parts[0] = parts[0][2:] # Remove the prefix from the first element |
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268 |
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269 if prefix == "m=": |
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270 media_type = parts[0] |
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271 port = int(parts[1]) |
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272 payload_types = {} |
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273 for payload_type_id in [int(pt_id) for pt_id in parts[3:]]: |
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274 payload_type = {"id": payload_type_id} |
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275 payload_types[payload_type_id] = payload_type |
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276 |
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277 application_data = {"media": media_type, "payload_types": payload_types} |
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278 transport_data = {"port": port} |
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279 if fingerprint_data is not None: |
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280 transport_data["fingerprint"] = fingerprint_data |
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281 if ice_pwd is not None: |
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282 transport_data["pwd"] = ice_pwd |
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283 if ice_ufrag is not None: |
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284 transport_data["ufrag"] = ice_ufrag |
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285 media_data = call_data[media_type] = { |
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286 "application_data": application_data, |
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287 "transport_data": transport_data, |
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288 } |
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289 |
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290 elif prefix == "a=": |
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291 if ":" in parts[0]: |
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292 attribute, parts[0] = parts[0].split(":", 1) |
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293 else: |
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294 attribute = parts[0] |
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295 |
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296 if ( |
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297 media_type is None |
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298 or application_data is None |
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299 or transport_data is None |
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300 ) and not ( |
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301 attribute |
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302 in ( |
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303 "sendrecv", |
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304 "sendonly", |
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305 "recvonly", |
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306 "inactive", |
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307 "fingerprint", |
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308 "group", |
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309 "ice-options", |
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310 "msid-semantic", |
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311 "ice-pwd", |
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312 "ice-ufrag", |
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313 ) |
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314 ): |
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315 log.warning( |
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316 "Received attribute before media description, this is " |
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317 f"invalid: {line}" |
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318 ) |
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319 continue |
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320 |
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321 if attribute == "mid": |
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322 assert media_data is not None |
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323 try: |
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324 media_data["id"] = parts[0] |
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325 except IndexError: |
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326 log.warning(f"invalid media ID: {line}") |
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327 |
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328 elif attribute == "rtpmap": |
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329 assert application_data is not None |
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330 assert payload_types is not None |
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331 pt_id = int(parts[0]) |
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332 codec_info = parts[1].split("/") |
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333 codec = codec_info[0] |
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334 clockrate = int(codec_info[1]) |
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335 payload_type = { |
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336 "id": pt_id, |
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337 "name": codec, |
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338 "clockrate": clockrate, |
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339 } |
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340 # Handle optional channel count |
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341 if len(codec_info) > 2: |
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342 channels = int(codec_info[2]) |
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343 payload_type["channels"] = channels |
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344 |
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345 payload_types.setdefault(pt_id, {}).update(payload_type) |
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346 |
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347 elif attribute == "fmtp": |
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348 assert payload_types is not None |
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349 pt_id = int(parts[0]) |
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350 params = parts[1].split(";") |
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351 try: |
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352 payload_type = payload_types[pt_id] |
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353 except KeyError: |
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354 raise ValueError( |
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355 f"Can find content type {pt_id}, ignoring: {line}" |
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356 ) |
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357 |
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358 try: |
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359 payload_type["parameters"] = { |
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360 name: value |
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361 for name, value in (param.split("=") for param in params) |
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362 } |
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363 except ValueError: |
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364 payload_type.setdefault("exra-parameters", []).extend(params) |
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365 |
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366 elif attribute == "candidate": |
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367 assert transport_data is not None |
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368 candidate = { |
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369 "foundation": parts[0], |
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370 "component_id": int(parts[1]), |
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371 "transport": parts[2], |
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372 "priority": int(parts[3]), |
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373 "address": parts[4], |
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374 "port": int(parts[5]), |
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375 "type": parts[7], |
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376 } |
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377 |
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378 for part in parts[8:]: |
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379 if part == "raddr": |
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380 candidate["rel_addr"] = parts[parts.index(part) + 1] |
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381 elif part == "rport": |
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382 candidate["rel_port"] = int(parts[parts.index(part) + 1]) |
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383 elif part == "generation": |
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384 candidate["generation"] = parts[parts.index(part) + 1] |
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385 elif part == "network": |
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386 candidate["network"] = parts[parts.index(part) + 1] |
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387 |
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388 transport_data.setdefault("candidates", []).append(candidate) |
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389 |
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390 elif attribute == "fingerprint": |
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391 algorithm, fingerprint = parts[0], parts[1] |
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392 fingerprint_data = {"hash": algorithm, "fingerprint": fingerprint} |
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393 if transport_data is not None: |
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394 transport_data.setdefault("fingerprint", {}).update( |
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395 fingerprint_data |
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396 ) |
4056
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397 elif attribute == "setup": |
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398 assert transport_data is not None |
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399 setup = parts[0] |
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400 transport_data.setdefault("fingerprint", {})["setup"] = setup |
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|
401 |
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402 elif attribute == "b": |
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403 assert application_data is not None |
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404 bandwidth = int(parts[0]) |
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405 application_data["bandwidth"] = bandwidth |
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|
406 |
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407 elif attribute == "rtcp-mux": |
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408 assert application_data is not None |
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409 application_data["rtcp-mux"] = True |
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|
410 |
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411 elif attribute == "ice-ufrag": |
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412 if transport_data is not None: |
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413 transport_data["ufrag"] = parts[0] |
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|
414 |
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415 elif attribute == "ice-pwd": |
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416 if transport_data is not None: |
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|
417 transport_data["pwd"] = parts[0] |
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|
418 |
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|
419 host.trigger.point( |
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|
420 "XEP-0167_parse_sdp_a", |
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|
421 attribute, |
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422 parts, |
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|
423 call_data, |
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|
424 metadata, |
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|
425 media_type, |
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|
426 application_data, |
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|
427 transport_data, |
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|
428 triggers_no_cancel=True |
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changeset
|
429 ) |
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parents:
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changeset
|
430 |
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431 except ValueError as e: |
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432 raise ValueError(f"Could not parse line. Invalid format ({e}): {line}") from e |
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433 except IndexError as e: |
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parents:
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|
434 raise IndexError(f"Incomplete line. Missing data: {line}") from e |
1c4f4aa36d98
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Goffi <goffi@goffi.org>
parents:
diff
changeset
|
435 |
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diff
changeset
|
436 # we remove private data (data starting with _, used by some plugins (e.g. XEP-0294) |
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Goffi <goffi@goffi.org>
parents:
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|
437 # to handle session data at media level)) |
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parents:
diff
changeset
|
438 for key in [k for k in call_data if k.startswith("_")]: |
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parents:
diff
changeset
|
439 log.debug(f"cleaning remaining private data {key!r}") |
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parents:
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|
440 del call_data[key] |
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parents:
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changeset
|
441 |
4121
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4116
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|
442 # FIXME: is this really useful? |
4056
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|
443 # ICE candidates may only be specified for the first media, this |
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parents:
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444 # duplicate the candidate for the other in this case |
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|
445 all_media = {k:v for k,v in call_data.items() if k in ("audio", "video")} |
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parents:
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|
446 if len(all_media) > 1 and not all( |
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Goffi <goffi@goffi.org>
parents:
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|
447 "candidates" in c["transport_data"] for c in all_media.values() |
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parents:
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changeset
|
448 ): |
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parents:
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|
449 first_content = next(iter(all_media.values())) |
1c4f4aa36d98
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parents:
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changeset
|
450 try: |
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parents:
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changeset
|
451 ice_candidates = first_content["transport_data"]["candidates"] |
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parents:
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|
452 except KeyError: |
4116
23fa52acf72c
plugin XEP-0167, XEP-0176: transport-info and ICE candidate sending are delayed if session is not active yet
Goffi <goffi@goffi.org>
parents:
4071
diff
changeset
|
453 ice_candidates = [] |
23fa52acf72c
plugin XEP-0167, XEP-0176: transport-info and ICE candidate sending are delayed if session is not active yet
Goffi <goffi@goffi.org>
parents:
4071
diff
changeset
|
454 for idx, content in enumerate(all_media.values()): |
23fa52acf72c
plugin XEP-0167, XEP-0176: transport-info and ICE candidate sending are delayed if session is not active yet
Goffi <goffi@goffi.org>
parents:
4071
diff
changeset
|
455 if idx == 0: |
23fa52acf72c
plugin XEP-0167, XEP-0176: transport-info and ICE candidate sending are delayed if session is not active yet
Goffi <goffi@goffi.org>
parents:
4071
diff
changeset
|
456 continue |
23fa52acf72c
plugin XEP-0167, XEP-0176: transport-info and ICE candidate sending are delayed if session is not active yet
Goffi <goffi@goffi.org>
parents:
4071
diff
changeset
|
457 content["transport_data"].setdefault("candidates", ice_candidates) |
4056
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parents:
diff
changeset
|
458 |
1c4f4aa36d98
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|
459 return call_data |
1c4f4aa36d98
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parents:
diff
changeset
|
460 |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
461 |
1c4f4aa36d98
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Goffi <goffi@goffi.org>
parents:
diff
changeset
|
462 def build_description(media: str, media_data: dict, session: dict) -> domish.Element: |
1c4f4aa36d98
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Goffi <goffi@goffi.org>
parents:
diff
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|
463 """Generate <description> element from media data |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
464 |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
465 @param media: media type ("audio" or "video") |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
466 |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
467 @param media_data: A dictionary containing the media description data. |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
468 The keys and values are described below: |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
469 |
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Goffi <goffi@goffi.org>
parents:
diff
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470 - ssrc (str, optional): The synchronization source identifier. |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
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|
471 - payload_types (list): A list of dictionaries, each representing a payload |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
472 type. |
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plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
473 Each dictionary may contain the following keys: |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
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|
474 - channels (str, optional): Number of audio channels. |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
475 - clockrate (str, optional): Clock rate of the media. |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
476 - id (str): The unique identifier of the payload type. |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
477 - maxptime (str, optional): Maximum packet time. |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
478 - name (str, optional): Name of the codec. |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
479 - ptime (str, optional): Preferred packet time. |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
480 - parameters (dict, optional): A dictionary of codec-specific parameters. |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
481 Key-value pairs represent the parameter name and value, respectively. |
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plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
482 - bandwidth (str, optional): The bandwidth type. |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
483 - rtcp-mux (bool, optional): Indicates whether RTCP multiplexing is enabled or |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
484 not. |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
485 - encryption (list, optional): A list of dictionaries, each representing an |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
486 encryption method. |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
487 Each dictionary may contain the following keys: |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
488 - tag (str): The unique identifier of the encryption method. |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
489 - crypto-suite (str): The encryption suite in use. |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
490 - key-params (str): Key parameters for the encryption suite. |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
491 - session-params (str, optional): Session parameters for the encryption |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
492 suite. |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
493 |
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plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
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|
494 @return: A <description> element. |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
495 """ |
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plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
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|
496 # FIXME: to be removed once host is accessible from global var |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
497 assert host is not None |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
498 |
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plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
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|
499 desc_elt = domish.Element((NS_JINGLE_RTP, "description"), attribs={"media": media}) |
1c4f4aa36d98
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Goffi <goffi@goffi.org>
parents:
diff
changeset
|
500 |
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plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
501 for pt_id, pt_data in media_data.get("payload_types", {}).items(): |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
502 payload_type_elt = desc_elt.addElement("payload-type") |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
503 payload_type_elt["id"] = str(pt_id) |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
504 for attr in ["channels", "clockrate", "maxptime", "name", "ptime"]: |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
505 if attr in pt_data: |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
506 payload_type_elt[attr] = str(pt_data[attr]) |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
507 |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
508 if "parameters" in pt_data: |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
509 for param_name, param_value in pt_data["parameters"].items(): |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
510 param_elt = payload_type_elt.addElement("parameter") |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
511 param_elt["name"] = param_name |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
512 param_elt["value"] = param_value |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
513 host.trigger.point( |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
514 "XEP-0167_build_description_payload_type", |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
515 desc_elt, |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
516 media_data, |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
517 pt_data, |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
518 payload_type_elt, |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
519 triggers_no_cancel=True |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
520 ) |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
521 |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
522 if "bandwidth" in media_data: |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
523 bandwidth_elt = desc_elt.addElement("bandwidth") |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
524 bandwidth_elt["type"] = media_data["bandwidth"] |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
525 |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
526 if media_data.get("rtcp-mux"): |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
527 desc_elt.addElement("rtcp-mux") |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
528 |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
529 # Add encryption element |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
530 if "encryption" in media_data: |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
531 encryption_elt = desc_elt.addElement("encryption") |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
532 # we always want require encryption if the `encryption` data is present |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
533 encryption_elt["required"] = "1" |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
534 for enc_data in media_data["encryption"]: |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
535 crypto_elt = encryption_elt.addElement("crypto") |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
536 for attr in ["tag", "crypto-suite", "key-params", "session-params"]: |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
537 if attr in enc_data: |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
538 crypto_elt[attr] = enc_data[attr] |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
539 |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
540 host.trigger.point( |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
541 "XEP-0167_build_description", |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
542 desc_elt, |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
543 media_data, |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
544 session, |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
545 triggers_no_cancel=True |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
546 ) |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
547 |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
548 return desc_elt |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
549 |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
550 |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
551 def parse_description(desc_elt: domish.Element) -> dict: |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
552 """Parse <desciption> to a dict |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
553 |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
554 @param desc_elt: <description> element |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
555 @return: media data as in [build_description] |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
556 """ |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
557 # FIXME: to be removed once host is accessible from global var |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
558 assert host is not None |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
559 |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
560 media_data = {} |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
561 if desc_elt.hasAttribute("ssrc"): |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
562 media_data.setdefault("ssrc", {})[desc_elt["ssrc"]] = {} |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
563 |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
564 payload_types = {} |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
565 for payload_type_elt in desc_elt.elements(NS_JINGLE_RTP, "payload-type"): |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
566 payload_type_data = { |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
567 attr: payload_type_elt[attr] |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
568 for attr in [ |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
569 "channels", |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
570 "clockrate", |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
571 "maxptime", |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
572 "name", |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
573 "ptime", |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
574 ] |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
575 if payload_type_elt.hasAttribute(attr) |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
576 } |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
577 try: |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
578 pt_id = int(payload_type_elt["id"]) |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
579 except KeyError: |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
580 log.warning( |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
581 f"missing ID in payload type, ignoring: {payload_type_elt.toXml()}" |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
582 ) |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
583 continue |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
584 |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
585 parameters = {} |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
586 for param_elt in payload_type_elt.elements(NS_JINGLE_RTP, "parameter"): |
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587 param_name = param_elt.getAttribute("name") |
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588 param_value = param_elt.getAttribute("value") |
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589 if not param_name or param_value is None: |
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590 log.warning(f"invalid parameter: {param_elt.toXml()}") |
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591 continue |
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592 parameters[param_name] = param_value |
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593 |
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594 if parameters: |
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595 payload_type_data["parameters"] = parameters |
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596 |
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597 host.trigger.point( |
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598 "XEP-0167_parse_description_payload_type", |
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599 desc_elt, |
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600 media_data, |
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601 payload_type_elt, |
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602 payload_type_data, |
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603 triggers_no_cancel=True |
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604 ) |
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605 payload_types[pt_id] = payload_type_data |
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606 |
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607 # bandwidth |
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608 media_data["payload_types"] = payload_types |
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609 try: |
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610 bandwidth_elt = next(desc_elt.elements(NS_JINGLE_RTP, "bandwidth")) |
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611 except StopIteration: |
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612 pass |
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613 else: |
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614 bandwidth = bandwidth_elt.getAttribute("type") |
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615 if not bandwidth: |
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616 log.warning(f"invalid bandwidth: {bandwidth_elt.toXml}") |
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617 else: |
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618 media_data["bandwidth"] = bandwidth |
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619 |
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620 # rtcp-mux |
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621 rtcp_mux_elt = next(desc_elt.elements(NS_JINGLE_RTP, "rtcp-mux"), None) |
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622 media_data["rtcp-mux"] = rtcp_mux_elt is not None |
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623 |
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624 # Encryption |
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625 encryption_data = [] |
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626 encryption_elt = next(desc_elt.elements(NS_JINGLE_RTP, "encryption"), None) |
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627 if encryption_elt: |
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628 media_data["encryption_required"] = C.bool( |
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629 encryption_elt.getAttribute("required", C.BOOL_FALSE) |
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630 ) |
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631 |
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632 for crypto_elt in encryption_elt.elements(NS_JINGLE_RTP, "crypto"): |
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633 crypto_data = { |
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634 attr: crypto_elt[attr] |
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635 for attr in [ |
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636 "crypto-suite", |
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637 "key-params", |
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638 "session-params", |
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639 "tag", |
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640 ] |
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641 if crypto_elt.hasAttribute(attr) |
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642 } |
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643 encryption_data.append(crypto_data) |
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644 |
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645 if encryption_data: |
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646 media_data["encryption"] = encryption_data |
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|
647 |
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648 host.trigger.point( |
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649 "XEP-0167_parse_description", |
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650 desc_elt, |
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651 media_data, |
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652 triggers_no_cancel=True |
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|
653 ) |
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|
654 |
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655 return media_data |