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-rw-r--r--modules/webrtc/webrtc_data_channel_js.cpp365
1 files changed, 365 insertions, 0 deletions
diff --git a/modules/webrtc/webrtc_data_channel_js.cpp b/modules/webrtc/webrtc_data_channel_js.cpp
new file mode 100644
index 0000000000..2edd212a50
--- /dev/null
+++ b/modules/webrtc/webrtc_data_channel_js.cpp
@@ -0,0 +1,365 @@
+/*************************************************************************/
+/* webrtc_data_channel_js.cpp */
+/*************************************************************************/
+/* This file is part of: */
+/* GODOT ENGINE */
+/* https://godotengine.org */
+/*************************************************************************/
+/* Copyright (c) 2007-2019 Juan Linietsky, Ariel Manzur. */
+/* Copyright (c) 2014-2019 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" {
+EMSCRIPTEN_KEEPALIVE void _emrtc_on_ch_error(void *obj) {
+ WebRTCDataChannelJS *peer = static_cast<WebRTCDataChannelJS *>(obj);
+ peer->_on_error();
+}
+
+EMSCRIPTEN_KEEPALIVE void _emrtc_on_ch_open(void *obj) {
+ WebRTCDataChannelJS *peer = static_cast<WebRTCDataChannelJS *>(obj);
+ peer->_on_open();
+}
+
+EMSCRIPTEN_KEEPALIVE void _emrtc_on_ch_close(void *obj) {
+ WebRTCDataChannelJS *peer = static_cast<WebRTCDataChannelJS *>(obj);
+ peer->_on_close();
+}
+
+EMSCRIPTEN_KEEPALIVE void _emrtc_on_ch_message(void *obj, uint8_t *p_data, uint32_t p_size, bool p_is_string) {
+ WebRTCDataChannelJS *peer = static_cast<WebRTCDataChannelJS *>(obj);
+ peer->_on_message(p_data, p_size, p_is_string);
+}
+}
+
+void WebRTCDataChannelJS::_on_open() {
+ in_buffer.resize(_in_buffer_shift);
+}
+
+void WebRTCDataChannelJS::_on_close() {
+ close();
+}
+
+void WebRTCDataChannelJS::_on_error() {
+ close();
+}
+
+void WebRTCDataChannelJS::_on_message(uint8_t *p_data, uint32_t p_size, bool p_is_string) {
+
+ 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);
+ queue_count++;
+}
+
+void WebRTCDataChannelJS::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;
+ var channel = dict["channel"];
+ channel.onopen = null;
+ channel.onclose = null;
+ channel.onerror = null;
+ channel.onmessage = null;
+ channel.close();
+ }, _js_id);
+ /* clang-format on */
+}
+
+Error WebRTCDataChannelJS::poll() {
+ return OK;
+}
+
+WebRTCDataChannelJS::ChannelState WebRTCDataChannelJS::get_ready_state() const {
+ /* clang-format off */
+ return (ChannelState) EM_ASM_INT({
+ var dict = Module.IDHandler.get($0);
+ if (!dict) return 3; // CLOSED
+ var channel = dict["channel"];
+ switch(channel.readyState) {
+ case "connecting":
+ return 0;
+ case "open":
+ return 1;
+ case "closing":
+ return 2;
+ case "closed":
+ return 3;
+ }
+ return 3; // CLOSED
+ }, _js_id);
+ /* clang-format on */
+}
+
+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;
+
+ /* 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 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;
+}
+
+/* clang-format off */
+#define _JS_GET(PROP, DEF) \
+EM_ASM_INT({ \
+ var dict = Module.IDHandler.get($0); \
+ if (!dict || !dict["channel"]) { \
+ return DEF; \
+ } \
+ var out = dict["channel"].PROP; \
+ return out === null ? DEF : out; \
+}, _js_id)
+/* clang-format on */
+
+bool WebRTCDataChannelJS::is_ordered() const {
+ return _JS_GET(ordered, true);
+}
+
+int WebRTCDataChannelJS::get_id() const {
+ return _JS_GET(id, 65535);
+}
+
+int WebRTCDataChannelJS::get_max_packet_life_time() const {
+ // Can't use macro, webkit workaround.
+ /* clang-format off */
+ return EM_ASM_INT({
+ var dict = Module.IDHandler.get($0);
+ if (!dict || !dict["channel"]) {
+ return 65535;
+ }
+ if (dict["channel"].maxRetransmitTime !== undefined) {
+ // Guess someone didn't appreciate the standardization process.
+ return dict["channel"].maxRetransmitTime;
+ }
+ var out = dict["channel"].maxPacketLifeTime;
+ return out === null ? 65535 : out;
+ }, _js_id);
+ /* clang-format on */
+}
+
+int WebRTCDataChannelJS::get_max_retransmits() const {
+ return _JS_GET(maxRetransmits, 65535);
+}
+
+String WebRTCDataChannelJS::get_protocol() const {
+ return _protocol;
+}
+
+bool WebRTCDataChannelJS::is_negotiated() const {
+ return _JS_GET(negotiated, false);
+}
+
+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;
+
+ /* clang-format off */
+ EM_ASM({
+ var c_ptr = $0;
+ var dict = Module.IDHandler.get($1);
+ if (!dict) return;
+ var channel = dict["channel"];
+ dict["ptr"] = c_ptr;
+
+ channel.binaryType = "arraybuffer";
+ channel.onopen = function (evt) {
+ ccall("_emrtc_on_ch_open",
+ "void",
+ ["number"],
+ [c_ptr]
+ );
+ };
+ channel.onclose = function (evt) {
+ ccall("_emrtc_on_ch_close",
+ "void",
+ ["number"],
+ [c_ptr]
+ );
+ };
+ channel.onerror = function (evt) {
+ ccall("_emrtc_on_ch_error",
+ "void",
+ ["number"],
+ [c_ptr]
+ );
+ };
+ 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) {
+ console.error("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 {
+ console.error("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_ch_message",
+ "void",
+ ["number", "number", "number", "number"],
+ [c_ptr, out, len, is_string]
+ );
+ Module._free(out);
+ }
+
+ }, this, js_id);
+ // Parse label
+ char *str;
+ str = (char *)EM_ASM_INT({
+ var dict = Module.IDHandler.get($0);
+ if (!dict || !dict["channel"]) return 0;
+ var str = dict["channel"].label;
+ var len = lengthBytesUTF8(str)+1;
+ var ptr = _malloc(str);
+ stringToUTF8(str, ptr, len+1);
+ return ptr;
+ }, js_id);
+ if(str != NULL) {
+ _label.parse_utf8(str);
+ EM_ASM({ _free($0) }, str);
+ }
+ str = (char *)EM_ASM_INT({
+ var dict = Module.IDHandler.get($0);
+ if (!dict || !dict["channel"]) return 0;
+ var str = dict["channel"].protocol;
+ var len = lengthBytesUTF8(str)+1;
+ var ptr = _malloc(str);
+ stringToUTF8(str, ptr, len+1);
+ return ptr;
+ }, js_id);
+ if(str != NULL) {
+ _protocol.parse_utf8(str);
+ EM_ASM({ _free($0) }, str);
+ }
+ /* clang-format on */
+}
+
+WebRTCDataChannelJS::~WebRTCDataChannelJS() {
+ close();
+ /* clang-format off */
+ EM_ASM({
+ Module.IDHandler.remove($0);
+ }, _js_id);
+ /* clang-format on */
+};
+#endif
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