Add get_buffered_amount() to WebRTCDataChannel (Godot 3.x)

modules/gdnative/include/net/godot_webrtc.h

@@ -108,6 +108,13 @@ typedef struct {
 	void *next; /* For extension? */
 } godot_net_webrtc_data_channel;
 
+/* Extensions to WebRTCDataChannel */
+typedef struct {
+	int (*get_buffered_amount)(const void *);
+
+	void *next; /* For extension? */
+} godot_net_webrtc_data_channel_ext;
+
 /* Set the default GDNative library */
 godot_error GDAPI godot_net_set_webrtc_library(const godot_net_webrtc_library *);
 /* Binds a WebRTCPeerConnectionGDNative to the provided interface */

modules/webrtc/doc_classes/WebRTCDataChannel.xml

@@ -14,6 +14,13 @@
 				Closes this data channel, notifying the other peer.
 			</description>
 		</method>
+		<method name="get_buffered_amount" qualifiers="const">
+			<return type="int">
+			</return>
+			<description>
+				Returns the number of bytes currently queued to be sent over this channel.
+			</description>
+		</method>
 		<method name="get_id" qualifiers="const">
 			<return type="int">
 			</return>

modules/webrtc/library_godot_webrtc.js

@@ -166,6 +166,11 @@ const GodotRTCDataChannel = {
 		return GodotRTCDataChannel.get_prop(p_id, 'negotiated', 65535);
 	},
 
+	godot_js_rtc_datachannel_get_buffered_amount__sig: 'ii',
+	godot_js_rtc_datachannel_get_buffered_amount: function (p_id) {
+		return GodotRTCDataChannel.get_prop(p_id, 'bufferedAmount', 0);
+	},
+
 	godot_js_rtc_datachannel_label_get__sig: 'ii',
 	godot_js_rtc_datachannel_label_get: function (p_id) {
 		const ref = IDHandler.get(p_id);

modules/webrtc/webrtc_data_channel.cpp

@@ -46,6 +46,7 @@ void WebRTCDataChannel::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("get_max_retransmits"), &WebRTCDataChannel::get_max_retransmits);
 	ClassDB::bind_method(D_METHOD("get_protocol"), &WebRTCDataChannel::get_protocol);
 	ClassDB::bind_method(D_METHOD("is_negotiated"), &WebRTCDataChannel::is_negotiated);
+	ClassDB::bind_method(D_METHOD("get_buffered_amount"), &WebRTCDataChannel::get_buffered_amount);
 
 	ADD_PROPERTY(PropertyInfo(Variant::INT, "write_mode", PROPERTY_HINT_ENUM), "set_write_mode", "get_write_mode");
 

modules/webrtc/webrtc_data_channel.h

@@ -70,6 +70,8 @@ class WebRTCDataChannel : public PacketPeer {
 	virtual String get_protocol() const = 0;
 	virtual bool is_negotiated() const = 0;
 
+	virtual int get_buffered_amount() const = 0;
+
 	virtual Error poll() = 0;
 	virtual void close() = 0;
 

modules/webrtc/webrtc_data_channel_gdnative.cpp

@@ -110,6 +110,13 @@ bool WebRTCDataChannelGDNative::is_negotiated() const {
 	return interface->is_negotiated(interface->data);
 }
 
+int WebRTCDataChannelGDNative::get_buffered_amount() const {
+	ERR_FAIL_COND_V(interface == nullptr, 0);
+	ERR_FAIL_COND_V(interface->next == nullptr, 0);
+
+	return ((godot_net_webrtc_data_channel_ext *)interface->next)->get_buffered_amount(interface->data);
+}
+
 Error WebRTCDataChannelGDNative::get_packet(const uint8_t **r_buffer, int &r_buffer_size) {
 	ERR_FAIL_COND_V(interface == nullptr, ERR_UNCONFIGURED);
 	return (Error)interface->get_packet(interface->data, r_buffer, &r_buffer_size);

modules/webrtc/webrtc_data_channel_gdnative.h

@@ -60,6 +60,7 @@ class WebRTCDataChannelGDNative : public WebRTCDataChannel {
 	virtual int get_max_retransmits() const;
 	virtual String get_protocol() const;
 	virtual bool is_negotiated() const;
+	virtual int get_buffered_amount() const;
 
 	virtual Error poll();
 	virtual void close();

modules/webrtc/webrtc_data_channel_js.cpp

@@ -46,6 +46,7 @@ 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);
@@ -181,6 +182,10 @@ 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() {
 	queue_count = 0;
 	_was_string = false;

modules/webrtc/webrtc_data_channel_js.h

@@ -72,6 +72,7 @@ class WebRTCDataChannelJS : public WebRTCDataChannel {
 	virtual int get_max_retransmits() const;
 	virtual String get_protocol() const;
 	virtual bool is_negotiated() const;
+	virtual int get_buffered_amount() const;
 
 	virtual Error poll();
 	virtual void close();