godot/modules/webrtc/library_godot_webrtc.js
Fabio Alessandrelli e52ed6d89e [HTML5] Port JavaScript inline code to libraries.
The API is implemented in javascript, and generates C functions that can
be called from godot.
This allows much cleaner code replacing all `EM_ASM` calls in our C++
code with plain C function calls.
This also gets rid of few hacks and comes with few optimizations (e.g.
custom cursor shapes should be much faster now).
2020-11-10 10:56:13 +01:00

408 lines
12 KiB
JavaScript

/*************************************************************************/
/* library_godot_webrtc.js */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2020 Godot Engine contributors (cf. AUTHORS.md). */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
var GodotRTCDataChannel = {
// Our socket implementation that forwards events to C++.
$GodotRTCDataChannel__deps: ['$IDHandler', '$GodotOS'],
$GodotRTCDataChannel: {
connect: function(p_id, p_on_open, p_on_message, p_on_error, p_on_close) {
const ref = IDHandler.get(p_id);
if (!ref) {
return;
}
ref.binaryType = 'arraybuffer';
ref.onopen = function (event) {
p_on_open();
};
ref.onclose = function (event) {
p_on_close();
};
ref.onerror = function (event) {
p_on_error();
};
ref.onmessage = function(event) {
var buffer;
var is_string = 0;
if (event.data instanceof ArrayBuffer) {
buffer = new Uint8Array(event.data);
} else if (event.data instanceof Blob) {
console.error("Blob type not supported");
return;
} else if (typeof event.data === "string") {
is_string = 1;
var enc = new TextEncoder("utf-8");
buffer = new Uint8Array(enc.encode(event.data));
} else {
console.error("Unknown message type");
return;
}
var len = buffer.length*buffer.BYTES_PER_ELEMENT;
var out = _malloc(len);
HEAPU8.set(buffer, out);
p_on_message(out, len, is_string);
_free(out);
}
},
close: function(p_id) {
const ref = IDHandler.get(p_id);
if (!ref) {
return;
}
ref.onopen = null;
ref.onmessage = null;
ref.onerror = null;
ref.onclose = null;
ref.close();
},
get_prop: function(p_id, p_prop, p_def) {
const ref = IDHandler.get(p_id);
return (ref && ref[p_prop] !== undefined) ? ref[p_prop] : p_def;
},
},
godot_js_rtc_datachannel_ready_state_get: function(p_id) {
const ref = IDHandler.get(p_id);
if (!ref) {
return 3; // CLOSED
}
switch(ref.readyState) {
case "connecting":
return 0;
case "open":
return 1;
case "closing":
return 2;
case "closed":
return 3;
}
return 3; // CLOSED
},
godot_js_rtc_datachannel_send: function(p_id, p_buffer, p_length, p_raw) {
const ref = IDHandler.get(p_id);
if (!ref) {
return 1;
}
const bytes_array = new Uint8Array(p_length);
for (var i = 0; i < p_length; i++) {
bytes_array[i] = getValue(p_buffer + i, 'i8');
}
if (p_raw) {
ref.send(bytes_array.buffer);
} else {
const string = new TextDecoder('utf-8').decode(bytes_array);
ref.send(string);
}
},
godot_js_rtc_datachannel_is_ordered: function(p_id) {
return IDHandler.get_prop(p_id, 'ordered', true);
},
godot_js_rtc_datachannel_id_get: function(p_id) {
return IDHandler.get_prop(p_id, 'id', 65535);
},
godot_js_rtc_datachannel_max_packet_lifetime_get: function(p_id) {
const ref = IDHandler.get(p_id);
if (!ref) {
return 65535;
}
if (ref['maxPacketLifeTime'] !== undefined) {
return ref['maxPacketLifeTime'];
} else if (ref['maxRetransmitTime'] !== undefined) {
// Guess someone didn't appreciate the standardization process.
return ref['maxRetransmitTime'];
}
return 65535;
},
godot_js_rtc_datachannel_max_retransmits_get: function(p_id) {
return IDHandler.get_prop(p_id, 'maxRetransmits', 65535);
},
godot_js_rtc_datachannel_is_negotiated: function(p_id, p_def) {
return IDHandler.get_prop(p_id, 'negotiated', 65535);
},
godot_js_rtc_datachannel_label_get: function(p_id) {
const ref = IDHandler.get(p_id);
if (!ref || !ref.label) {
return 0;
}
return GodotOS.allocString(ref.label);
},
godot_js_rtc_datachannel_protocol_get: function(p_id) {
const ref = IDHandler.get(p_id);
if (!ref || !ref.protocol) {
return 0;
}
return GodotOS.allocString(ref.protocol);
},
godot_js_rtc_datachannel_destroy: function(p_id) {
GodotRTCDataChannel.close(p_id);
IDHandler.remove(p_id);
},
godot_js_rtc_datachannel_connect: function(p_id, p_ref, p_on_open, p_on_message, p_on_error, p_on_close) {
const onopen = GodotOS.get_func(p_on_open).bind(null, p_ref);
const onmessage = GodotOS.get_func(p_on_message).bind(null, p_ref);
const onerror = GodotOS.get_func(p_on_error).bind(null, p_ref);
const onclose = GodotOS.get_func(p_on_close).bind(null, p_ref);
GodotRTCDataChannel.connect(p_id, onopen, onmessage, onerror, onclose);
},
godot_js_rtc_datachannel_close: function(p_id) {
const ref = IDHandler.get(p_id);
if (!ref) {
return;
}
GodotRTCDataChannel.close(p_id);
},
};
autoAddDeps(GodotRTCDataChannel, '$GodotRTCDataChannel');
mergeInto(LibraryManager.library, GodotRTCDataChannel);
var GodotRTCPeerConnection = {
$GodotRTCPeerConnection__deps: ['$IDHandler', '$GodotOS', '$GodotRTCDataChannel'],
$GodotRTCPeerConnection: {
onstatechange: function(p_id, p_conn, callback, event) {
const ref = IDHandler.get(p_id);
if (!ref) {
return;
}
var state = 5; // CLOSED
switch(p_conn.iceConnectionState) {
case "new":
state = 0;
case "checking":
state = 1;
case "connected":
case "completed":
state = 2;
case "disconnected":
state = 3;
case "failed":
state = 4;
case "closed":
state = 5;
}
callback(state);
},
onicecandidate: function(p_id, callback, event) {
const ref = IDHandler.get(p_id);
if (!ref || !event.candidate) {
return;
}
let c = event.candidate;
let candidate_str = GodotOS.allocString(c.candidate);
let mid_str = GodotOS.allocString(c.sdpMid);
callback(mid_str, c.sdpMLineIndex, candidate_str);
_free(candidate_str);
_free(mid_str);
},
ondatachannel: function(p_id, callback, event) {
const ref = IDHandler.get(p_id);
if (!ref) {
return;
}
const cid = IDHandler.add(event.channel);
callback(cid);
},
onsession: function(p_id, callback, session) {
const ref = IDHandler.get(p_id);
if (!ref) {
return;
}
let type_str = GodotOS.allocString(session.type);
let sdp_str = GodotOS.allocString(session.sdp);
callback(type_str, sdp_str);
_free(type_str);
_free(sdp_str);
},
onerror: function(p_id, callback, error) {
const ref = IDHandler.get(p_id);
if (!ref) {
return;
}
console.error(error);
callback();
},
},
godot_js_rtc_pc_create: function(p_config, p_ref, p_on_state_change, p_on_candidate, p_on_datachannel) {
const onstatechange = GodotOS.get_func(p_on_state_change).bind(null, p_ref);
const oncandidate = GodotOS.get_func(p_on_candidate).bind(null, p_ref);
const ondatachannel = GodotOS.get_func(p_on_datachannel).bind(null, p_ref);
var config = JSON.parse(UTF8ToString(p_config));
var conn = null;
try {
conn = new RTCPeerConnection(config);
} catch (e) {
console.error(e);
return 0;
}
const base = GodotRTCPeerConnection;
const id = IDHandler.add(conn);
conn.oniceconnectionstatechange = base.onstatechange.bind(null, id, conn, onstatechange);
conn.onicecandidate = base.onicecandidate.bind(null, id, oncandidate);
conn.ondatachannel = base.ondatachannel.bind(null, id, ondatachannel);
return id;
},
godot_js_rtc_pc_close: function(p_id) {
const ref = IDHandler.get(p_id);
if (!ref) {
return;
}
ref.close();
},
godot_js_rtc_pc_destroy: function(p_id) {
const ref = IDHandler.get(p_id);
if (!ref) {
return;
}
ref.oniceconnectionstatechange = null;
ref.onicecandidate = null;
ref.ondatachannel = null;
IDHandler.remove(p_id);
},
godot_js_rtc_pc_offer_create: function(p_id, p_obj, p_on_session, p_on_error) {
const ref = IDHandler.get(p_id);
if (!ref) {
return;
}
const onsession = GodotOS.get_func(p_on_session).bind(null, p_obj);
const onerror = GodotOS.get_func(p_on_error).bind(null, p_obj);
ref.createOffer().then(function(session) {
GodotRTCPeerConnection.onsession(p_id, onsession, session);
}).catch(function(error) {
GodotRTCPeerConnection.onerror(p_id, onerror, error);
});
},
godot_js_rtc_pc_local_description_set: function(p_id, p_type, p_sdp, p_obj, p_on_error) {
const ref = IDHandler.get(p_id);
if (!ref) {
return;
}
const type = UTF8ToString(p_type);
const sdp = UTF8ToString(p_sdp);
const onerror = GodotOS.get_func(p_on_error).bind(null, p_obj);
ref.setLocalDescription({
'sdp': sdp,
'type': type
}).catch(function(error) {
GodotRTCPeerConnection.onerror(p_id, onerror, error);
});
},
godot_js_rtc_pc_remote_description_set: function(p_id, p_type, p_sdp, p_obj, p_session_created, p_on_error) {
const ref = IDHandler.get(p_id);
if (!ref) {
return;
}
const type = UTF8ToString(p_type);
const sdp = UTF8ToString(p_sdp);
const onerror = GodotOS.get_func(p_on_error).bind(null, p_obj);
const onsession = GodotOS.get_func(p_session_created).bind(null, p_obj);
ref.setRemoteDescription({
'sdp': sdp,
'type': type
}).then(function() {
if (type != 'offer') {
return;
}
return ref.createAnswer().then(function(session) {
GodotRTCPeerConnection.onsession(p_id, onsession, session);
});
}).catch(function(error) {
GodotRTCPeerConnection.onerror(p_id, onerror, error);
});
},
godot_js_rtc_pc_ice_candidate_add: function(p_id, p_mid_name, p_mline_idx, p_sdp) {
const ref = IDHandler.get(p_id);
if (!ref) {
return;
}
var sdpMidName = UTF8ToString(p_mid_name);
var sdpName = UTF8ToString(p_sdp);
ref.addIceCandidate(new RTCIceCandidate({
"candidate": sdpName,
"sdpMid": sdpMidName,
"sdpMlineIndex": p_mline_idx,
}));
},
godot_js_rtc_pc_datachannel_create__deps: ['$GodotRTCDataChannel'],
godot_js_rtc_pc_datachannel_create: function(p_id, p_label, p_config) {
try {
const ref = IDHandler.get(p_id);
if (!ref) {
return 0;
}
const label = UTF8ToString(p_label);
const config = JSON.parse(UTF8ToString(p_config));
const channel = ref.createDataChannel(label, config);
return IDHandler.add(channel);
} catch (e) {
console.error(e);
return 0;
}
},
};
autoAddDeps(GodotRTCPeerConnection, '$GodotRTCPeerConnection')
mergeInto(LibraryManager.library, GodotRTCPeerConnection);