456 lines
12 KiB
C++
456 lines
12 KiB
C++
/*************************************************************************/
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/* webrtc_peer_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) 2007-2018 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2018 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_js.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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WebRTCPeerJS *peer = static_cast<WebRTCPeerJS *>(obj);
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peer->emit_signal("new_ice_candidate", String(p_MidName), p_MlineIndexName, String(p_sdpName));
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}
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EMSCRIPTEN_KEEPALIVE void _emrtc_offer_created(void *obj, char *p_type, char *p_offer) {
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WebRTCPeerJS *peer = static_cast<WebRTCPeerJS *>(obj);
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peer->emit_signal("offer_created", String(p_type), String(p_offer));
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}
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EMSCRIPTEN_KEEPALIVE void _emrtc_on_error(void *obj) {
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WebRTCPeerJS *peer = static_cast<WebRTCPeerJS *>(obj);
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peer->_on_error();
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}
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EMSCRIPTEN_KEEPALIVE void _emrtc_on_open(void *obj) {
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WebRTCPeerJS *peer = static_cast<WebRTCPeerJS *>(obj);
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peer->_on_open();
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}
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EMSCRIPTEN_KEEPALIVE void _emrtc_on_close(void *obj) {
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WebRTCPeerJS *peer = static_cast<WebRTCPeerJS *>(obj);
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peer->_on_close();
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}
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EMSCRIPTEN_KEEPALIVE void _emrtc_on_message(void *obj, uint8_t *p_data, uint32_t p_size, bool p_is_string) {
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WebRTCPeerJS *peer = static_cast<WebRTCPeerJS *>(obj);
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peer->_on_message(p_data, p_size, p_is_string);
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}
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EMSCRIPTEN_KEEPALIVE void _emrtc_bind_channel(int p_id) {
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/* clang-format off */
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EM_ASM({
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if (!Module.IDHandler.has($0)) {
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return; // Godot Object is gone!
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}
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var dict = Module.IDHandler.get($0);
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var channel = dict["channel"];
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var c_ptr = dict["ptr"];
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channel.onopen = function (evt) {
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ccall("_emrtc_on_open",
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"void",
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["number"],
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[c_ptr]
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);
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};
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channel.onclose = function (evt) {
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ccall("_emrtc_on_close",
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"void",
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["number"],
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[c_ptr]
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);
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};
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channel.onerror = function (evt) {
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ccall("_emrtc_on_error",
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"void",
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["number"],
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[c_ptr]
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);
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};
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channel.binaryType = "arraybuffer";
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channel.onmessage = function(event) {
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var buffer;
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var is_string = 0;
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if (event.data instanceof ArrayBuffer) {
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buffer = new Uint8Array(event.data);
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} else if (event.data instanceof Blob) {
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alert("Blob type not supported");
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return;
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} else if (typeof event.data === "string") {
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is_string = 1;
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var enc = new TextEncoder("utf-8");
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buffer = new Uint8Array(enc.encode(event.data));
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} else {
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alert("Unknown message type");
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return;
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}
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var len = buffer.length*buffer.BYTES_PER_ELEMENT;
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var out = Module._malloc(len);
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Module.HEAPU8.set(buffer, out);
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ccall("_emrtc_on_message",
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"void",
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["number", "number", "number", "number"],
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[c_ptr, out, len, is_string]
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);
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Module._free(out);
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}
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}, p_id);
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/* clang-format on */
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}
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}
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void _emrtc_create_pc(int p_id) {
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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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// Setup local connaction
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var conn = new RTCPeerConnection();
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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 || dict["channel"]) {
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return;
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}
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var channel = evt.channel;
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dict["channel"] = channel;
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ccall("_emrtc_bind_channel",
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"void",
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["number"],
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[$0]
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);
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};
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dict["conn"] = conn;
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}, p_id);
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/* clang-format on */
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}
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void WebRTCPeerJS::_on_open() {
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in_buffer.resize(16);
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_conn_state = STATE_CONNECTED;
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}
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void WebRTCPeerJS::_on_close() {
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close();
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}
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void WebRTCPeerJS::_on_error() {
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close();
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_conn_state = STATE_FAILED;
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}
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void WebRTCPeerJS::_on_message(uint8_t *p_data, uint32_t p_size, bool p_is_string) {
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if (in_buffer.space_left() < p_size + 5) {
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ERR_EXPLAIN("Buffer full! Dropping data");
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ERR_FAIL();
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}
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uint8_t is_string = p_is_string ? 1 : 0;
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in_buffer.write((uint8_t *)&p_size, 4);
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in_buffer.write((uint8_t *)&is_string, 1);
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in_buffer.write(p_data, p_size);
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queue_count++;
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}
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void WebRTCPeerJS::close() {
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in_buffer.resize(0);
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queue_count = 0;
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_was_string = false;
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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["channel"]) {
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dict["channel"].close();
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dict["channel"] = null;
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}
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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 WebRTCPeerJS::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.log(error);
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ccall("_emrtc_on_error",
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"void",
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["number"],
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[c_ptr]
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);
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};
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var onCreated = function(offer) {
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ccall("_emrtc_offer_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 channel = conn.createDataChannel("default");
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dict["channel"] = channel;
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ccall("_emrtc_bind_channel",
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"void",
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["number"],
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[$0]
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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 WebRTCPeerJS::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.log(error);
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ccall("_emrtc_on_error",
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"void",
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["number"],
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[c_ptr]
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);
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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 WebRTCPeerJS::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.log(error);
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ccall("_emrtc_on_error",
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"void",
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["number"],
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[c_ptr]
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);
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};
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var onCreated = function(offer) {
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ccall("_emrtc_offer_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 WebRTCPeerJS::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 WebRTCPeerJS::poll() {
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return OK;
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}
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WebRTCPeer::ConnectionState WebRTCPeerJS::get_connection_state() const {
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return _conn_state;
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}
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int WebRTCPeerJS::get_available_packet_count() const {
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return queue_count;
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}
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Error WebRTCPeerJS::get_packet(const uint8_t **r_buffer, int &r_buffer_size) {
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ERR_FAIL_COND_V(_conn_state != STATE_CONNECTED, ERR_UNCONFIGURED);
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if (queue_count == 0)
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return ERR_UNAVAILABLE;
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uint32_t to_read = 0;
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uint32_t left = 0;
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uint8_t is_string = 0;
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r_buffer_size = 0;
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in_buffer.read((uint8_t *)&to_read, 4);
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--queue_count;
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left = in_buffer.data_left();
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if (left < to_read + 1) {
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in_buffer.advance_read(left);
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return FAILED;
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}
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in_buffer.read(&is_string, 1);
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_was_string = is_string == 1;
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in_buffer.read(packet_buffer, to_read);
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*r_buffer = packet_buffer;
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r_buffer_size = to_read;
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return OK;
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}
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Error WebRTCPeerJS::put_packet(const uint8_t *p_buffer, int p_buffer_size) {
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ERR_FAIL_COND_V(_conn_state != STATE_CONNECTED, ERR_UNCONFIGURED);
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int is_bin = _write_mode == WebRTCPeer::WRITE_MODE_BINARY ? 1 : 0;
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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 channel = dict["channel"];
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var bytes_array = new Uint8Array($2);
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var i = 0;
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for(i=0; i<$2; i++) {
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bytes_array[i] = getValue($1+i, 'i8');
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}
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if ($3) {
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channel.send(bytes_array.buffer);
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} else {
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var string = new TextDecoder("utf-8").decode(bytes_array);
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channel.send(string);
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}
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}, _js_id, p_buffer, p_buffer_size, is_bin);
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/* clang-format on */
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return OK;
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}
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int WebRTCPeerJS::get_max_packet_size() const {
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return 1200;
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}
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void WebRTCPeerJS::set_write_mode(WriteMode p_mode) {
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_write_mode = p_mode;
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}
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WebRTCPeer::WriteMode WebRTCPeerJS::get_write_mode() const {
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return _write_mode;
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}
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bool WebRTCPeerJS::was_string_packet() const {
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return _was_string;
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}
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WebRTCPeerJS::WebRTCPeerJS() {
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queue_count = 0;
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_was_string = false;
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_write_mode = WRITE_MODE_BINARY;
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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, "channel": null});
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}, this);
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/* clang-format on */
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_emrtc_create_pc(_js_id);
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}
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WebRTCPeerJS::~WebRTCPeerJS() {
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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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