[HTML5] Port JavaScript inline code to libraries.

The API is implemented in javascript, and generates C functions that can
be called from godot.
This allows much cleaner code replacing all `EM_ASM` calls in our C++
code with plain C function calls.
This also gets rid of few hacks and comes with few optimizations (e.g.
custom cursor shapes should be much faster now).

1 files changed, 22 insertions, 1 deletions

diff --git a/modules/webrtc/webrtc_peer_connection_js.h b/modules/webrtc/webrtc_peer_connection_js.h
index cdaf3068e3..e33dd5f259 100644
--- a/modules/webrtc/webrtc_peer_connection_js.h
+++ b/modules/webrtc/webrtc_peer_connection_js.h
@@ -35,16 +35,37 @@
 
 #include "webrtc_peer_connection.h"
 
+extern "C" {
+typedef void (*RTCOnIceConnectionStateChange)(void *p_obj, int p_state);
+typedef void (*RTCOnIceCandidate)(void *p_obj, const char *p_mid, int p_mline_idx, const char *p_candidate);
+typedef void (*RTCOnDataChannel)(void *p_obj, int p_id);
+typedef void (*RTCOnSession)(void *p_obj, const char *p_type, const char *p_sdp);
+typedef void (*RTCOnError)(void *p_obj);
+extern int godot_js_rtc_pc_create(const char *p_config, void *p_obj, RTCOnIceConnectionStateChange p_on_state_change, RTCOnIceCandidate p_on_candidate, RTCOnDataChannel p_on_datachannel);
+extern void godot_js_rtc_pc_close(int p_id);
+extern void godot_js_rtc_pc_destroy(int p_id);
+extern void godot_js_rtc_pc_offer_create(int p_id, void *p_obj, RTCOnSession p_on_session, RTCOnError p_on_error);
+extern void godot_js_rtc_pc_local_description_set(int p_id, const char *p_type, const char *p_sdp, void *p_obj, RTCOnError p_on_error);
+extern void godot_js_rtc_pc_remote_description_set(int p_id, const char *p_type, const char *p_sdp, void *p_obj, RTCOnSession p_on_session, RTCOnError p_on_error);
+extern void godot_js_rtc_pc_ice_candidate_add(int p_id, const char *p_mid_name, int p_mline_idx, const char *p_sdo);
+extern int godot_js_rtc_pc_datachannel_create(int p_id, const char *p_label, const char *p_config);
+}
+
 class WebRTCPeerConnectionJS : public WebRTCPeerConnection {
 private:
 	int _js_id;
 	ConnectionState _conn_state;
 
+	static void _on_connection_state_changed(void *p_obj, int p_state);
+	static void _on_ice_candidate(void *p_obj, const char *p_mid_name, int p_mline_idx, const char *p_candidate);
+	static void _on_data_channel(void *p_obj, int p_channel);
+	static void _on_session_created(void *p_obj, const char *p_type, const char *p_session);
+	static void _on_error(void *p_obj);
+
 public:
 	static WebRTCPeerConnection *_create() { return memnew(WebRTCPeerConnectionJS); }
 	static void make_default() { WebRTCPeerConnection::_create = WebRTCPeerConnectionJS::_create; }
 
-	void _on_connection_state_changed();
 	virtual ConnectionState get_connection_state() const;
 
 	virtual Error initialize(Dictionary configuration = Dictionary());