mirror of
https://github.com/godotengine/godot.git
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365 lines
9.8 KiB
C++
365 lines
9.8 KiB
C++
/*************************************************************************/
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/* webrtc_data_channel_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) 2007-2019 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2019 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_data_channel_js.h"
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#include "emscripten.h"
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extern "C" {
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EMSCRIPTEN_KEEPALIVE void _emrtc_on_ch_error(void *obj) {
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WebRTCDataChannelJS *peer = static_cast<WebRTCDataChannelJS *>(obj);
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peer->_on_error();
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}
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EMSCRIPTEN_KEEPALIVE void _emrtc_on_ch_open(void *obj) {
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WebRTCDataChannelJS *peer = static_cast<WebRTCDataChannelJS *>(obj);
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peer->_on_open();
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}
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EMSCRIPTEN_KEEPALIVE void _emrtc_on_ch_close(void *obj) {
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WebRTCDataChannelJS *peer = static_cast<WebRTCDataChannelJS *>(obj);
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peer->_on_close();
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}
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EMSCRIPTEN_KEEPALIVE void _emrtc_on_ch_message(void *obj, uint8_t *p_data, uint32_t p_size, bool p_is_string) {
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WebRTCDataChannelJS *peer = static_cast<WebRTCDataChannelJS *>(obj);
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peer->_on_message(p_data, p_size, p_is_string);
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}
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}
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void WebRTCDataChannelJS::_on_open() {
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in_buffer.resize(_in_buffer_shift);
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}
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void WebRTCDataChannelJS::_on_close() {
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close();
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}
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void WebRTCDataChannelJS::_on_error() {
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close();
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}
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void WebRTCDataChannelJS::_on_message(uint8_t *p_data, uint32_t p_size, bool p_is_string) {
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ERR_FAIL_COND_MSG(in_buffer.space_left() < (int)(p_size + 5), "Buffer full! Dropping data.");
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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 WebRTCDataChannelJS::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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var channel = dict["channel"];
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channel.onopen = null;
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channel.onclose = null;
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channel.onerror = null;
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channel.onmessage = null;
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channel.close();
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}, _js_id);
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/* clang-format on */
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}
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Error WebRTCDataChannelJS::poll() {
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return OK;
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}
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WebRTCDataChannelJS::ChannelState WebRTCDataChannelJS::get_ready_state() const {
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/* clang-format off */
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return (ChannelState) EM_ASM_INT({
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var dict = Module.IDHandler.get($0);
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if (!dict) return 3; // CLOSED
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var channel = dict["channel"];
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switch(channel.readyState) {
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case "connecting":
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return 0;
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case "open":
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return 1;
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case "closing":
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return 2;
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case "closed":
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return 3;
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}
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return 3; // CLOSED
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}, _js_id);
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/* clang-format on */
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}
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int WebRTCDataChannelJS::get_available_packet_count() const {
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return queue_count;
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}
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Error WebRTCDataChannelJS::get_packet(const uint8_t **r_buffer, int &r_buffer_size) {
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ERR_FAIL_COND_V(get_ready_state() != STATE_OPEN, 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 WebRTCDataChannelJS::put_packet(const uint8_t *p_buffer, int p_buffer_size) {
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ERR_FAIL_COND_V(get_ready_state() != STATE_OPEN, ERR_UNCONFIGURED);
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int is_bin = _write_mode == WebRTCDataChannel::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 WebRTCDataChannelJS::get_max_packet_size() const {
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return 1200;
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}
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void WebRTCDataChannelJS::set_write_mode(WriteMode p_mode) {
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_write_mode = p_mode;
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}
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WebRTCDataChannel::WriteMode WebRTCDataChannelJS::get_write_mode() const {
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return _write_mode;
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}
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bool WebRTCDataChannelJS::was_string_packet() const {
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return _was_string;
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}
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String WebRTCDataChannelJS::get_label() const {
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return _label;
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}
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/* clang-format off */
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#define _JS_GET(PROP, DEF) \
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EM_ASM_INT({ \
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var dict = Module.IDHandler.get($0); \
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if (!dict || !dict["channel"]) { \
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return DEF; \
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} \
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var out = dict["channel"].PROP; \
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return out === null ? DEF : out; \
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}, _js_id)
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/* clang-format on */
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bool WebRTCDataChannelJS::is_ordered() const {
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return _JS_GET(ordered, true);
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}
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int WebRTCDataChannelJS::get_id() const {
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return _JS_GET(id, 65535);
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}
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int WebRTCDataChannelJS::get_max_packet_life_time() const {
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// Can't use macro, webkit workaround.
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/* clang-format off */
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return EM_ASM_INT({
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var dict = Module.IDHandler.get($0);
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if (!dict || !dict["channel"]) {
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return 65535;
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}
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if (dict["channel"].maxRetransmitTime !== undefined) {
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// Guess someone didn't appreciate the standardization process.
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return dict["channel"].maxRetransmitTime;
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}
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var out = dict["channel"].maxPacketLifeTime;
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return out === null ? 65535 : out;
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}, _js_id);
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/* clang-format on */
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}
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int WebRTCDataChannelJS::get_max_retransmits() const {
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return _JS_GET(maxRetransmits, 65535);
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}
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String WebRTCDataChannelJS::get_protocol() const {
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return _protocol;
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}
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bool WebRTCDataChannelJS::is_negotiated() const {
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return _JS_GET(negotiated, false);
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}
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WebRTCDataChannelJS::WebRTCDataChannelJS() {
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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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_js_id = 0;
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}
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WebRTCDataChannelJS::WebRTCDataChannelJS(int js_id) {
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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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_js_id = js_id;
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/* clang-format off */
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EM_ASM({
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var c_ptr = $0;
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var dict = Module.IDHandler.get($1);
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if (!dict) return;
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var channel = dict["channel"];
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dict["ptr"] = c_ptr;
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channel.binaryType = "arraybuffer";
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channel.onopen = function (evt) {
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ccall("_emrtc_on_ch_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_ch_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_ch_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.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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console.error("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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console.error("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_ch_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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}, this, js_id);
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// Parse label
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char *str;
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str = (char *)EM_ASM_INT({
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var dict = Module.IDHandler.get($0);
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if (!dict || !dict["channel"]) return 0;
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var str = dict["channel"].label;
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var len = lengthBytesUTF8(str)+1;
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var ptr = _malloc(str);
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stringToUTF8(str, ptr, len+1);
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return ptr;
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}, js_id);
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if(str != NULL) {
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_label.parse_utf8(str);
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EM_ASM({ _free($0) }, str);
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}
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str = (char *)EM_ASM_INT({
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var dict = Module.IDHandler.get($0);
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if (!dict || !dict["channel"]) return 0;
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var str = dict["channel"].protocol;
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var len = lengthBytesUTF8(str)+1;
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var ptr = _malloc(str);
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stringToUTF8(str, ptr, len+1);
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return ptr;
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}, js_id);
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if(str != NULL) {
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_protocol.parse_utf8(str);
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EM_ASM({ _free($0) }, str);
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}
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/* clang-format on */
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}
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WebRTCDataChannelJS::~WebRTCDataChannelJS() {
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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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