1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
|
/*************************************************************************/
/* webrtc_data_channel_js.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2020 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_data_channel_js.h"
#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 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);
}
WebRTCDataChannelJS::WebRTCDataChannelJS() {
queue_count = 0;
_was_string = false;
_write_mode = WRITE_MODE_BINARY;
_js_id = 0;
}
WebRTCDataChannelJS::WebRTCDataChannelJS(int js_id) {
queue_count = 0;
_was_string = false;
_write_mode = WRITE_MODE_BINARY;
_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
|