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- /**************************************************************************/
- /* webrtc_data_channel_js.cpp */
- /**************************************************************************/
- /* This file is part of: */
- /* GODOT ENGINE */
- /* https://godotengine.org */
- /**************************************************************************/
- /* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
- /* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
- /* */
- /* 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. */
- /**************************************************************************/
- #include "webrtc_data_channel_js.h"
- #ifdef WEB_ENABLED
- #include <emscripten.h>
- extern "C" {
- typedef void (*RTCChOnOpen)(void *p_obj);
- typedef void (*RTCChOnMessage)(void *p_obj, const uint8_t *p_buffer, int p_size, int p_is_string);
- typedef void (*RTCChOnClose)(void *p_obj);
- typedef void (*RTCChOnError)(void *p_obj);
- extern int godot_js_rtc_datachannel_ready_state_get(int p_id);
- extern int godot_js_rtc_datachannel_send(int p_id, const uint8_t *p_buffer, int p_length, int p_raw);
- extern int godot_js_rtc_datachannel_is_ordered(int p_id);
- extern int godot_js_rtc_datachannel_id_get(int p_id);
- extern int godot_js_rtc_datachannel_max_packet_lifetime_get(int p_id);
- extern int godot_js_rtc_datachannel_max_retransmits_get(int p_id);
- extern int godot_js_rtc_datachannel_is_negotiated(int p_id);
- extern int godot_js_rtc_datachannel_get_buffered_amount(int p_id);
- extern char *godot_js_rtc_datachannel_label_get(int p_id); // Must free the returned string.
- extern char *godot_js_rtc_datachannel_protocol_get(int p_id); // Must free the returned string.
- extern void godot_js_rtc_datachannel_destroy(int p_id);
- extern void godot_js_rtc_datachannel_connect(int p_id, void *p_obj, RTCChOnOpen p_on_open, RTCChOnMessage p_on_message, RTCChOnError p_on_error, RTCChOnClose p_on_close);
- extern void godot_js_rtc_datachannel_close(int p_id);
- }
- void WebRTCDataChannelJS::_on_open(void *p_obj) {
- WebRTCDataChannelJS *peer = static_cast<WebRTCDataChannelJS *>(p_obj);
- peer->in_buffer.resize(peer->_in_buffer_shift);
- }
- void WebRTCDataChannelJS::_on_close(void *p_obj) {
- WebRTCDataChannelJS *peer = static_cast<WebRTCDataChannelJS *>(p_obj);
- peer->close();
- }
- void WebRTCDataChannelJS::_on_error(void *p_obj) {
- WebRTCDataChannelJS *peer = static_cast<WebRTCDataChannelJS *>(p_obj);
- peer->close();
- }
- void WebRTCDataChannelJS::_on_message(void *p_obj, const uint8_t *p_data, int p_size, int p_is_string) {
- WebRTCDataChannelJS *peer = static_cast<WebRTCDataChannelJS *>(p_obj);
- RingBuffer<uint8_t> &in_buffer = peer->in_buffer;
- ERR_FAIL_COND_MSG(in_buffer.space_left() < (int)(p_size + 5), "Buffer full! Dropping data.");
- 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);
- peer->queue_count++;
- }
- void WebRTCDataChannelJS::close() {
- in_buffer.resize(0);
- queue_count = 0;
- _was_string = false;
- godot_js_rtc_datachannel_close(_js_id);
- }
- Error WebRTCDataChannelJS::poll() {
- return OK;
- }
- WebRTCDataChannelJS::ChannelState WebRTCDataChannelJS::get_ready_state() const {
- return (ChannelState)godot_js_rtc_datachannel_ready_state_get(_js_id);
- }
- int WebRTCDataChannelJS::get_available_packet_count() const {
- return queue_count;
- }
- Error WebRTCDataChannelJS::get_packet(const uint8_t **r_buffer, int &r_buffer_size) {
- ERR_FAIL_COND_V(get_ready_state() != STATE_OPEN, 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 WebRTCDataChannelJS::put_packet(const uint8_t *p_buffer, int p_buffer_size) {
- ERR_FAIL_COND_V(get_ready_state() != STATE_OPEN, ERR_UNCONFIGURED);
- int is_bin = _write_mode == WebRTCDataChannel::WRITE_MODE_BINARY ? 1 : 0;
- godot_js_rtc_datachannel_send(_js_id, p_buffer, p_buffer_size, is_bin);
- return OK;
- }
- int WebRTCDataChannelJS::get_max_packet_size() const {
- return 1200;
- }
- void WebRTCDataChannelJS::set_write_mode(WriteMode p_mode) {
- _write_mode = p_mode;
- }
- WebRTCDataChannel::WriteMode WebRTCDataChannelJS::get_write_mode() const {
- return _write_mode;
- }
- bool WebRTCDataChannelJS::was_string_packet() const {
- return _was_string;
- }
- String WebRTCDataChannelJS::get_label() const {
- return _label;
- }
- bool WebRTCDataChannelJS::is_ordered() const {
- return godot_js_rtc_datachannel_is_ordered(_js_id);
- }
- int WebRTCDataChannelJS::get_id() const {
- return godot_js_rtc_datachannel_id_get(_js_id);
- }
- int WebRTCDataChannelJS::get_max_packet_life_time() const {
- return godot_js_rtc_datachannel_max_packet_lifetime_get(_js_id);
- }
- int WebRTCDataChannelJS::get_max_retransmits() const {
- return godot_js_rtc_datachannel_max_retransmits_get(_js_id);
- }
- String WebRTCDataChannelJS::get_protocol() const {
- return _protocol;
- }
- bool WebRTCDataChannelJS::is_negotiated() const {
- return godot_js_rtc_datachannel_is_negotiated(_js_id);
- }
- int WebRTCDataChannelJS::get_buffered_amount() const {
- return godot_js_rtc_datachannel_get_buffered_amount(_js_id);
- }
- WebRTCDataChannelJS::WebRTCDataChannelJS() {
- }
- WebRTCDataChannelJS::WebRTCDataChannelJS(int js_id) {
- _js_id = js_id;
- godot_js_rtc_datachannel_connect(js_id, this, &_on_open, &_on_message, &_on_error, &_on_close);
- // Parse label
- char *label = godot_js_rtc_datachannel_label_get(js_id);
- if (label) {
- _label.parse_utf8(label);
- free(label);
- }
- char *protocol = godot_js_rtc_datachannel_protocol_get(js_id);
- if (protocol) {
- _protocol.parse_utf8(protocol);
- free(protocol);
- }
- }
- WebRTCDataChannelJS::~WebRTCDataChannelJS() {
- close();
- godot_js_rtc_datachannel_destroy(_js_id);
- }
- #endif
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