From 90b5655a6eb3837ad6f984ce4ffcd3e9aa7480ce Mon Sep 17 00:00:00 2001
From: cbdev <cb@cbcdn.com>
Date: Thu, 5 Mar 2020 00:03:12 +0100
Subject: Implement ArtNet rate-limiting to approx. 44 pps

---
 backends/artnet.h | 15 ++++++++++++---
 1 file changed, 12 insertions(+), 3 deletions(-)

(limited to 'backends/artnet.h')

diff --git a/backends/artnet.h b/backends/artnet.h
index 1efdee6..aac73fe 100644
--- a/backends/artnet.h
+++ b/backends/artnet.h
@@ -4,6 +4,7 @@
 #include "midimonster.h"
 
 MM_PLUGIN_API int init();
+static uint32_t artnet_interval();
 static int artnet_configure(char* option, char* value);
 static int artnet_configure_instance(instance* instance, char* option, char* value);
 static int artnet_instance(instance* inst);
@@ -16,7 +17,10 @@ static int artnet_shutdown(size_t n, instance** inst);
 #define ARTNET_PORT "6454"
 #define ARTNET_VERSION 14
 #define ARTNET_RECV_BUF 4096
-#define ARTNET_KEEPALIVE_INTERVAL 2000
+
+#define ARTNET_KEEPALIVE_INTERVAL 1000
+//limit transmit rate to at most 44 packets per second (1000/44 ~= 22)
+#define ARTNET_FRAME_TIMEOUT 20
 
 #define MAP_COARSE 0x0200
 #define MAP_FINE 0x0400
@@ -52,11 +56,16 @@ typedef union /*_artnet_instance_id*/ {
 	uint64_t label;
 } artnet_instance_id;
 
+typedef struct /*_artnet_fd_universe*/ {
+	uint64_t label;
+	uint64_t last_frame;
+	uint8_t mark;
+} artnet_output_universe;
+
 typedef struct /*_artnet_fd*/ {
 	int fd;
 	size_t output_instances;
-	artnet_instance_id* output_instance;
-	uint64_t* last_frame;
+	artnet_output_universe* output_instance;
 } artnet_descriptor;
 
 #pragma pack(push, 1)
-- 
cgit v1.2.3