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315 lines
9.6 KiB
C++
315 lines
9.6 KiB
C++
/*************************************************************************/
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/* webrtc_peer_connection_js.cpp */
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/*************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* https://godotengine.org */
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/*************************************************************************/
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/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2020 Godot Engine contributors (cf. AUTHORS.md). */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/*************************************************************************/
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#ifdef JAVASCRIPT_ENABLED
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#include "webrtc_peer_connection_js.h"
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#include "webrtc_data_channel_js.h"
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#include "core/io/json.h"
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#include "emscripten.h"
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extern "C" {
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EMSCRIPTEN_KEEPALIVE void _emrtc_on_ice_candidate(void *obj, char *p_MidName, int p_MlineIndexName, char *p_sdpName) {
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WebRTCPeerConnectionJS *peer = static_cast<WebRTCPeerConnectionJS *>(obj);
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peer->emit_signal("ice_candidate_created", String(p_MidName), p_MlineIndexName, String(p_sdpName));
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}
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EMSCRIPTEN_KEEPALIVE void _emrtc_session_description_created(void *obj, char *p_type, char *p_offer) {
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WebRTCPeerConnectionJS *peer = static_cast<WebRTCPeerConnectionJS *>(obj);
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peer->emit_signal("session_description_created", String(p_type), String(p_offer));
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}
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EMSCRIPTEN_KEEPALIVE void _emrtc_on_connection_state_changed(void *obj) {
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WebRTCPeerConnectionJS *peer = static_cast<WebRTCPeerConnectionJS *>(obj);
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peer->_on_connection_state_changed();
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}
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EMSCRIPTEN_KEEPALIVE void _emrtc_on_error() {
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ERR_PRINT("RTCPeerConnection error!");
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}
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EMSCRIPTEN_KEEPALIVE void _emrtc_emit_channel(void *obj, int p_id) {
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WebRTCPeerConnectionJS *peer = static_cast<WebRTCPeerConnectionJS *>(obj);
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peer->emit_signal("data_channel_received", Ref<WebRTCDataChannelJS>(new WebRTCDataChannelJS(p_id)));
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}
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}
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void _emrtc_create_pc(int p_id, const Dictionary &p_config) {
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String config = JSON::print(p_config);
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/* clang-format off */
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EM_ASM({
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var dict = Module.IDHandler.get($0);
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var c_ptr = dict["ptr"];
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var config = JSON.parse(UTF8ToString($1));
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// Setup local connaction
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var conn = null;
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try {
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conn = new RTCPeerConnection(config);
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} catch (e) {
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console.log(e);
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return;
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}
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conn.oniceconnectionstatechange = function(event) {
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if (!Module.IDHandler.get($0)) return;
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ccall("_emrtc_on_connection_state_changed", "void", ["number"], [c_ptr]);
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};
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conn.onicecandidate = function(event) {
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if (!Module.IDHandler.get($0)) return;
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if (!event.candidate) return;
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var c = event.candidate;
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// should emit on ice candidate
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ccall("_emrtc_on_ice_candidate",
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"void",
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["number", "string", "number", "string"],
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[c_ptr, c.sdpMid, c.sdpMLineIndex, c.candidate]
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);
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};
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conn.ondatachannel = function (evt) {
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var dict = Module.IDHandler.get($0);
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if (!dict) {
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return;
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}
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var id = Module.IDHandler.add({"channel": evt.channel, "ptr": null});
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ccall("_emrtc_emit_channel",
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"void",
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["number", "number"],
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[c_ptr, id]
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);
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};
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dict["conn"] = conn;
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}, p_id, config.utf8().get_data());
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/* clang-format on */
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}
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void WebRTCPeerConnectionJS::_on_connection_state_changed() {
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/* clang-format off */
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_conn_state = (ConnectionState)EM_ASM_INT({
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var dict = Module.IDHandler.get($0);
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if (!dict) return 5; // CLOSED
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var conn = dict["conn"];
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switch(conn.iceConnectionState) {
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case "new":
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return 0;
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case "checking":
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return 1;
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case "connected":
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case "completed":
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return 2;
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case "disconnected":
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return 3;
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case "failed":
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return 4;
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case "closed":
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return 5;
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}
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return 5; // CLOSED
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}, _js_id);
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/* clang-format on */
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}
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void WebRTCPeerConnectionJS::close() {
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/* clang-format off */
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EM_ASM({
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var dict = Module.IDHandler.get($0);
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if (!dict) return;
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if (dict["conn"]) {
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dict["conn"].close();
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}
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}, _js_id);
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/* clang-format on */
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_conn_state = STATE_CLOSED;
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}
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Error WebRTCPeerConnectionJS::create_offer() {
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ERR_FAIL_COND_V(_conn_state != STATE_NEW, FAILED);
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_conn_state = STATE_CONNECTING;
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/* clang-format off */
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EM_ASM({
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var dict = Module.IDHandler.get($0);
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var conn = dict["conn"];
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var c_ptr = dict["ptr"];
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var onError = function(error) {
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console.error(error);
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ccall("_emrtc_on_error", "void", [], []);
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};
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var onCreated = function(offer) {
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ccall("_emrtc_session_description_created",
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"void",
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["number", "string", "string"],
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[c_ptr, offer.type, offer.sdp]
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);
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};
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conn.createOffer().then(onCreated).catch(onError);
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}, _js_id);
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/* clang-format on */
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return OK;
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}
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Error WebRTCPeerConnectionJS::set_local_description(String type, String sdp) {
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/* clang-format off */
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EM_ASM({
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var dict = Module.IDHandler.get($0);
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var conn = dict["conn"];
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var c_ptr = dict["ptr"];
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var type = UTF8ToString($1);
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var sdp = UTF8ToString($2);
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var onError = function(error) {
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console.error(error);
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ccall("_emrtc_on_error", "void", [], []);
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};
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conn.setLocalDescription({
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"sdp": sdp,
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"type": type
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}).catch(onError);
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}, _js_id, type.utf8().get_data(), sdp.utf8().get_data());
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/* clang-format on */
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return OK;
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}
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Error WebRTCPeerConnectionJS::set_remote_description(String type, String sdp) {
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if (type == "offer") {
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ERR_FAIL_COND_V(_conn_state != STATE_NEW, FAILED);
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_conn_state = STATE_CONNECTING;
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}
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/* clang-format off */
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EM_ASM({
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var dict = Module.IDHandler.get($0);
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var conn = dict["conn"];
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var c_ptr = dict["ptr"];
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var type = UTF8ToString($1);
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var sdp = UTF8ToString($2);
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var onError = function(error) {
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console.error(error);
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ccall("_emrtc_on_error", "void", [], []);
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};
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var onCreated = function(offer) {
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ccall("_emrtc_session_description_created",
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"void",
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["number", "string", "string"],
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[c_ptr, offer.type, offer.sdp]
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);
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};
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var onSet = function() {
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if (type != "offer") {
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return;
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}
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conn.createAnswer().then(onCreated);
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};
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conn.setRemoteDescription({
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"sdp": sdp,
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"type": type
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}).then(onSet).catch(onError);
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}, _js_id, type.utf8().get_data(), sdp.utf8().get_data());
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/* clang-format on */
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return OK;
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}
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Error WebRTCPeerConnectionJS::add_ice_candidate(String sdpMidName, int sdpMlineIndexName, String sdpName) {
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/* clang-format off */
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EM_ASM({
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var dict = Module.IDHandler.get($0);
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var conn = dict["conn"];
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var c_ptr = dict["ptr"];
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var sdpMidName = UTF8ToString($1);
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var sdpMlineIndexName = UTF8ToString($2);
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var sdpName = UTF8ToString($3);
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conn.addIceCandidate(new RTCIceCandidate({
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"candidate": sdpName,
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"sdpMid": sdpMidName,
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"sdpMlineIndex": sdpMlineIndexName
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}));
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}, _js_id, sdpMidName.utf8().get_data(), sdpMlineIndexName, sdpName.utf8().get_data());
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/* clang-format on */
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return OK;
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}
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Error WebRTCPeerConnectionJS::initialize(Dictionary p_config) {
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_emrtc_create_pc(_js_id, p_config);
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return OK;
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}
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Ref<WebRTCDataChannel> WebRTCPeerConnectionJS::create_data_channel(String p_channel, Dictionary p_channel_config) {
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String config = JSON::print(p_channel_config);
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/* clang-format off */
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int id = EM_ASM_INT({
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try {
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var dict = Module.IDHandler.get($0);
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if (!dict) return 0;
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var label = UTF8ToString($1);
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var config = JSON.parse(UTF8ToString($2));
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var conn = dict["conn"];
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return Module.IDHandler.add({
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"channel": conn.createDataChannel(label, config),
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"ptr": null
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})
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} catch (e) {
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return 0;
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}
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}, _js_id, p_channel.utf8().get_data(), config.utf8().get_data());
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/* clang-format on */
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ERR_FAIL_COND_V(id == 0, nullptr);
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return memnew(WebRTCDataChannelJS(id));
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}
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Error WebRTCPeerConnectionJS::poll() {
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return OK;
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}
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WebRTCPeerConnection::ConnectionState WebRTCPeerConnectionJS::get_connection_state() const {
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return _conn_state;
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}
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WebRTCPeerConnectionJS::WebRTCPeerConnectionJS() {
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_conn_state = STATE_NEW;
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/* clang-format off */
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_js_id = EM_ASM_INT({
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return Module.IDHandler.add({"conn": null, "ptr": $0});
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}, this);
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/* clang-format on */
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Dictionary config;
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_emrtc_create_pc(_js_id, config);
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}
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WebRTCPeerConnectionJS::~WebRTCPeerConnectionJS() {
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close();
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/* clang-format off */
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EM_ASM({
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Module.IDHandler.remove($0);
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}, _js_id);
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/* clang-format on */
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};
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#endif
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