diff options
Diffstat (limited to 'modules/webrtc/webrtc_peer_js.cpp')
| -rw-r--r-- | modules/webrtc/webrtc_peer_js.cpp | 455 |
1 files changed, 455 insertions, 0 deletions
diff --git a/modules/webrtc/webrtc_peer_js.cpp b/modules/webrtc/webrtc_peer_js.cpp new file mode 100644 index 0000000000..1282e075ab --- /dev/null +++ b/modules/webrtc/webrtc_peer_js.cpp @@ -0,0 +1,455 @@ +/*************************************************************************/ +/* webrtc_peer_js.cpp */ +/*************************************************************************/ +/* This file is part of: */ +/* GODOT ENGINE */ +/* https://godotengine.org */ +/*************************************************************************/ +/* Copyright (c) 2007-2018 Juan Linietsky, Ariel Manzur. */ +/* Copyright (c) 2014-2018 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. */ +/*************************************************************************/ + +#ifdef JAVASCRIPT_ENABLED + +#include "webrtc_peer_js.h" +#include "emscripten.h" + +extern "C" { +EMSCRIPTEN_KEEPALIVE void _emrtc_on_ice_candidate(void *obj, char *p_MidName, int p_MlineIndexName, char *p_sdpName) { + WebRTCPeerJS *peer = static_cast<WebRTCPeerJS *>(obj); + peer->emit_signal("new_ice_candidate", String(p_MidName), p_MlineIndexName, String(p_sdpName)); +} + +EMSCRIPTEN_KEEPALIVE void _emrtc_offer_created(void *obj, char *p_type, char *p_offer) { + WebRTCPeerJS *peer = static_cast<WebRTCPeerJS *>(obj); + peer->emit_signal("offer_created", String(p_type), String(p_offer)); +} + +EMSCRIPTEN_KEEPALIVE void _emrtc_on_error(void *obj) { + WebRTCPeerJS *peer = static_cast<WebRTCPeerJS *>(obj); + peer->_on_error(); +} + +EMSCRIPTEN_KEEPALIVE void _emrtc_on_open(void *obj) { + WebRTCPeerJS *peer = static_cast<WebRTCPeerJS *>(obj); + peer->_on_open(); +} + +EMSCRIPTEN_KEEPALIVE void _emrtc_on_close(void *obj) { + WebRTCPeerJS *peer = static_cast<WebRTCPeerJS *>(obj); + peer->_on_close(); +} + +EMSCRIPTEN_KEEPALIVE void _emrtc_on_message(void *obj, uint8_t *p_data, uint32_t p_size, bool p_is_string) { + WebRTCPeerJS *peer = static_cast<WebRTCPeerJS *>(obj); + peer->_on_message(p_data, p_size, p_is_string); +} + +EMSCRIPTEN_KEEPALIVE void _emrtc_bind_channel(int p_id) { + /* clang-format off */ + EM_ASM({ + if (!Module.IDHandler.has($0)) { + return; // Godot Object is gone! + } + var dict = Module.IDHandler.get($0); + var channel = dict["channel"]; + var c_ptr = dict["ptr"]; + + channel.onopen = function (evt) { + ccall("_emrtc_on_open", + "void", + ["number"], + [c_ptr] + ); + }; + channel.onclose = function (evt) { + ccall("_emrtc_on_close", + "void", + ["number"], + [c_ptr] + ); + }; + channel.onerror = function (evt) { + ccall("_emrtc_on_error", + "void", + ["number"], + [c_ptr] + ); + }; + + channel.binaryType = "arraybuffer"; + channel.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) { + + alert("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 { + + alert("Unknown message type"); + return; + + } + var len = buffer.length*buffer.BYTES_PER_ELEMENT; + var out = Module._malloc(len); + Module.HEAPU8.set(buffer, out); + ccall("_emrtc_on_message", + "void", + ["number", "number", "number", "number"], + [c_ptr, out, len, is_string] + ); + Module._free(out); + } + }, p_id); + /* clang-format on */ +} +} + +void _emrtc_create_pc(int p_id) { + /* clang-format off */ + EM_ASM({ + var dict = Module.IDHandler.get($0); + var c_ptr = dict["ptr"]; + // Setup local connaction + var conn = new RTCPeerConnection(); + conn.onicecandidate = function(event) { + if (!Module.IDHandler.get($0)) return; + if (!event.candidate) return; + + var c = event.candidate; + // should emit on ice candidate + ccall("_emrtc_on_ice_candidate", + "void", + ["number", "string", "number", "string"], + [c_ptr, c.sdpMid, c.sdpMLineIndex, c.candidate] + ); + }; + conn.ondatachannel = function (evt) { + var dict = Module.IDHandler.get($0); + if (!dict || dict["channel"]) { + return; + } + var channel = evt.channel; + dict["channel"] = channel; + ccall("_emrtc_bind_channel", + "void", + ["number"], + [$0] + ); + }; + dict["conn"] = conn; + }, p_id); + /* clang-format on */ +} + +void WebRTCPeerJS::_on_open() { + in_buffer.resize(16); + _conn_state = STATE_CONNECTED; +} + +void WebRTCPeerJS::_on_close() { + close(); +} + +void WebRTCPeerJS::_on_error() { + close(); + _conn_state = STATE_FAILED; +} + +void WebRTCPeerJS::_on_message(uint8_t *p_data, uint32_t p_size, bool p_is_string) { + if (in_buffer.space_left() < p_size + 5) { + ERR_EXPLAIN("Buffer full! Dropping data"); + ERR_FAIL(); + } + + uint8_t is_string = p_is_string ? 1 : 0; + in_buffer.write((uint8_t *)&p_size, 4); + in_buffer.write((uint8_t *)&is_string, 1); + in_buffer.write(p_data, p_size); + queue_count++; +} + +void WebRTCPeerJS::close() { + in_buffer.resize(0); + queue_count = 0; + _was_string = false; + /* clang-format off */ + EM_ASM({ + var dict = Module.IDHandler.get($0); + if (!dict) return; + if (dict["channel"]) { + dict["channel"].close(); + dict["channel"] = null; + } + if (dict["conn"]) { + dict["conn"].close(); + } + }, _js_id); + /* clang-format on */ + _conn_state = STATE_CLOSED; +} + +Error WebRTCPeerJS::create_offer() { + ERR_FAIL_COND_V(_conn_state != STATE_NEW, FAILED); + + _conn_state = STATE_CONNECTING; + /* clang-format off */ + EM_ASM({ + var dict = Module.IDHandler.get($0); + var conn = dict["conn"]; + var c_ptr = dict["ptr"]; + var onError = function(error) { + console.log(error); + ccall("_emrtc_on_error", + "void", + ["number"], + [c_ptr] + ); + }; + var onCreated = function(offer) { + ccall("_emrtc_offer_created", + "void", + ["number", "string", "string"], + [c_ptr, offer.type, offer.sdp] + ); + }; + + var channel = conn.createDataChannel("default"); + dict["channel"] = channel; + ccall("_emrtc_bind_channel", + "void", + ["number"], + [$0] + ); + conn.createOffer().then(onCreated).catch(onError); + }, _js_id); + /* clang-format on */ + return OK; +} + +Error WebRTCPeerJS::set_local_description(String type, String sdp) { + /* clang-format off */ + EM_ASM({ + var dict = Module.IDHandler.get($0); + var conn = dict["conn"]; + var c_ptr = dict["ptr"]; + var type = UTF8ToString($1); + var sdp = UTF8ToString($2); + var onError = function(error) { + console.log(error); + ccall("_emrtc_on_error", + "void", + ["number"], + [c_ptr] + ); + }; + conn.setLocalDescription({ + "sdp": sdp, + "type": type + }).catch(onError); + }, _js_id, type.utf8().get_data(), sdp.utf8().get_data()); + /* clang-format on */ + return OK; +} + +Error WebRTCPeerJS::set_remote_description(String type, String sdp) { + if (type == "offer") { + ERR_FAIL_COND_V(_conn_state != STATE_NEW, FAILED); + _conn_state = STATE_CONNECTING; + } + /* clang-format off */ + EM_ASM({ + var dict = Module.IDHandler.get($0); + var conn = dict["conn"]; + var c_ptr = dict["ptr"]; + var type = UTF8ToString($1); + var sdp = UTF8ToString($2); + + var onError = function(error) { + console.log(error); + ccall("_emrtc_on_error", + "void", + ["number"], + [c_ptr] + ); + }; + var onCreated = function(offer) { + ccall("_emrtc_offer_created", + "void", + ["number", "string", "string"], + [c_ptr, offer.type, offer.sdp] + ); + }; + var onSet = function() { + if (type != "offer") { + return; + } + conn.createAnswer().then(onCreated); + }; + conn.setRemoteDescription({ + "sdp": sdp, + "type": type + }).then(onSet).catch(onError); + }, _js_id, type.utf8().get_data(), sdp.utf8().get_data()); + /* clang-format on */ + return OK; +} + +Error WebRTCPeerJS::add_ice_candidate(String sdpMidName, int sdpMlineIndexName, String sdpName) { + /* clang-format off */ + EM_ASM({ + var dict = Module.IDHandler.get($0); + var conn = dict["conn"]; + var c_ptr = dict["ptr"]; + var sdpMidName = UTF8ToString($1); + var sdpMlineIndexName = UTF8ToString($2); + var sdpName = UTF8ToString($3); + conn.addIceCandidate(new RTCIceCandidate({ + "candidate": sdpName, + "sdpMid": sdpMidName, + "sdpMlineIndex": sdpMlineIndexName + })); + }, _js_id, sdpMidName.utf8().get_data(), sdpMlineIndexName, sdpName.utf8().get_data()); + /* clang-format on */ + return OK; +} + +Error WebRTCPeerJS::poll() { + return OK; +} + +WebRTCPeer::ConnectionState WebRTCPeerJS::get_connection_state() const { + return _conn_state; +} + +int WebRTCPeerJS::get_available_packet_count() const { + return queue_count; +} + +Error WebRTCPeerJS::get_packet(const uint8_t **r_buffer, int &r_buffer_size) { + ERR_FAIL_COND_V(_conn_state != STATE_CONNECTED, ERR_UNCONFIGURED); + + if (queue_count == 0) + return ERR_UNAVAILABLE; + + uint32_t to_read = 0; + uint32_t left = 0; + uint8_t is_string = 0; + r_buffer_size = 0; + + in_buffer.read((uint8_t *)&to_read, 4); + --queue_count; + left = in_buffer.data_left(); + + if (left < to_read + 1) { + in_buffer.advance_read(left); + return FAILED; + } + + in_buffer.read(&is_string, 1); + _was_string = is_string == 1; + in_buffer.read(packet_buffer, to_read); + *r_buffer = packet_buffer; + r_buffer_size = to_read; + + return OK; +} + +Error WebRTCPeerJS::put_packet(const uint8_t *p_buffer, int p_buffer_size) { + ERR_FAIL_COND_V(_conn_state != STATE_CONNECTED, ERR_UNCONFIGURED); + + int is_bin = _write_mode == WebRTCPeer::WRITE_MODE_BINARY ? 1 : 0; + + /* clang-format off */ + EM_ASM({ + var dict = Module.IDHandler.get($0); + var channel = dict["channel"]; + var bytes_array = new Uint8Array($2); + var i = 0; + + for(i=0; i<$2; i++) { + bytes_array[i] = getValue($1+i, 'i8'); + } + + if ($3) { + channel.send(bytes_array.buffer); + } else { + var string = new TextDecoder("utf-8").decode(bytes_array); + channel.send(string); + } + }, _js_id, p_buffer, p_buffer_size, is_bin); + /* clang-format on */ + + return OK; +} + +int WebRTCPeerJS::get_max_packet_size() const { + return 1200; +} + +void WebRTCPeerJS::set_write_mode(WriteMode p_mode) { + _write_mode = p_mode; +} + +WebRTCPeer::WriteMode WebRTCPeerJS::get_write_mode() const { + return _write_mode; +} + +bool WebRTCPeerJS::was_string_packet() const { + return _was_string; +} + +WebRTCPeerJS::WebRTCPeerJS() { + queue_count = 0; + _was_string = false; + _write_mode = WRITE_MODE_BINARY; + _conn_state = STATE_NEW; + + /* clang-format off */ + _js_id = EM_ASM_INT({ + return Module.IDHandler.add({"conn": null, "ptr": $0, "channel": null}); + }, this); + /* clang-format on */ + _emrtc_create_pc(_js_id); +} + +WebRTCPeerJS::~WebRTCPeerJS() { + close(); + /* clang-format off */ + EM_ASM({ + Module.IDHandler.remove($0); + }, _js_id); + /* clang-format on */ +}; +#endif |