mirror of
https://github.com/godotengine/godot.git
synced 2024-12-21 10:25:24 +08:00
456 lines
12 KiB
C++
456 lines
12 KiB
C++
/*************************************************************************/
|
|
/* 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
|