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-rw-r--r--backends/artnet.c52
-rw-r--r--backends/artnet.h15
-rw-r--r--backends/artnet.md3
3 files changed, 53 insertions, 17 deletions
diff --git a/backends/artnet.c b/backends/artnet.c
index ed426b0..77f03dd 100644
--- a/backends/artnet.c
+++ b/backends/artnet.c
@@ -9,6 +9,7 @@
#define MAX_FDS 255
+static uint32_t next_frame = 0;
static uint8_t default_net = 0;
static size_t artnet_fds = 0;
static artnet_descriptor* artnet_fd = NULL;
@@ -37,7 +38,6 @@ static int artnet_listener(char* host, char* port){
artnet_fd[artnet_fds].fd = fd;
artnet_fd[artnet_fds].output_instances = 0;
artnet_fd[artnet_fds].output_instance = NULL;
- artnet_fd[artnet_fds].last_frame = NULL;
artnet_fds++;
return 0;
}
@@ -52,6 +52,7 @@ MM_PLUGIN_API int init(){
.handle = artnet_set,
.process = artnet_handle,
.start = artnet_start,
+ .interval = artnet_interval,
.shutdown = artnet_shutdown
};
@@ -68,6 +69,13 @@ MM_PLUGIN_API int init(){
return 0;
}
+static uint32_t artnet_interval(){
+ if(next_frame){
+ return next_frame;
+ }
+ return ARTNET_KEEPALIVE_INTERVAL;
+}
+
static int artnet_configure(char* option, char* value){
char* host = NULL, *port = NULL, *fd_opts = NULL;
if(!strcmp(option, "net")){
@@ -211,7 +219,8 @@ static int artnet_transmit(instance* inst){
//update last frame timestamp
for(u = 0; u < artnet_fd[data->fd_index].output_instances; u++){
if(artnet_fd[data->fd_index].output_instance[u].label == inst->ident){
- artnet_fd[data->fd_index].last_frame[u] = mm_timestamp();
+ artnet_fd[data->fd_index].output_instance[u].last_frame = mm_timestamp();
+ artnet_fd[data->fd_index].output_instance[u].mark = 0;
}
}
return 0;
@@ -226,7 +235,6 @@ static int artnet_set(instance* inst, size_t num, channel** c, channel_value* v)
return 0;
}
- //FIXME maybe introduce minimum frame interval
for(u = 0; u < num; u++){
if(IS_WIDE(data->data.map[c[u]->ident])){
uint32_t val = v[u].normalised * ((double) 0xFFFF);
@@ -248,6 +256,21 @@ static int artnet_set(instance* inst, size_t num, channel** c, channel_value* v)
}
if(mark){
+ //find last frame time
+ for(u = 0; u < artnet_fd[data->fd_index].output_instances; u++){
+ if(artnet_fd[data->fd_index].output_instance[u].label == inst->ident){
+ break;
+ }
+ }
+
+ //check output rate limit, request next frame
+ if(mm_timestamp() - artnet_fd[data->fd_index].output_instance[u].last_frame < ARTNET_FRAME_TIMEOUT){
+ artnet_fd[data->fd_index].output_instance[u].mark = 1;
+ if(!next_frame || next_frame < mm_timestamp() - artnet_fd[data->fd_index].output_instance[u].last_frame){
+ next_frame = mm_timestamp() - artnet_fd[data->fd_index].output_instance[u].last_frame;
+ }
+ return 0;
+ }
return artnet_transmit(inst);
}
@@ -325,15 +348,23 @@ static int artnet_handle(size_t num, managed_fd* fds){
instance* inst = NULL;
artnet_pkt* frame = (artnet_pkt*) recv_buf;
- //transmit keepalive frames
+ //transmit keepalive & synthesized frames
+ next_frame = 0;
for(u = 0; u < artnet_fds; u++){
for(c = 0; c < artnet_fd[u].output_instances; c++){
- if(timestamp - artnet_fd[u].last_frame[c] >= ARTNET_KEEPALIVE_INTERVAL){
+ if(timestamp - artnet_fd[u].output_instance[c].last_frame >= ARTNET_KEEPALIVE_INTERVAL //timeout
+ || (artnet_fd[u].output_instance[c].mark && timestamp - artnet_fd[u].output_instance[c].last_frame >= ARTNET_FRAME_TIMEOUT)){ //synthesized frame
inst = mm_instance_find(BACKEND_NAME, artnet_fd[u].output_instance[c].label);
if(inst){
artnet_transmit(inst);
}
}
+
+ //update next_frame
+ if(artnet_fd[u].output_instance[c].mark
+ && (!next_frame || next_frame > mm_timestamp() - artnet_fd[u].output_instance[c].last_frame)){
+ next_frame = mm_timestamp() - artnet_fd[u].output_instance[c].last_frame;
+ }
}
}
@@ -407,15 +438,15 @@ static int artnet_start(size_t n, instance** inst){
//if enabled for output, add to keepalive tracking
if(data->dest_len){
- artnet_fd[data->fd_index].output_instance = realloc(artnet_fd[data->fd_index].output_instance, (artnet_fd[data->fd_index].output_instances + 1) * sizeof(artnet_instance_id));
- artnet_fd[data->fd_index].last_frame = realloc(artnet_fd[data->fd_index].last_frame, (artnet_fd[data->fd_index].output_instances + 1) * sizeof(uint64_t));
+ artnet_fd[data->fd_index].output_instance = realloc(artnet_fd[data->fd_index].output_instance, (artnet_fd[data->fd_index].output_instances + 1) * sizeof(artnet_output_universe));
- if(!artnet_fd[data->fd_index].output_instance || !artnet_fd[data->fd_index].last_frame){
+ if(!artnet_fd[data->fd_index].output_instance){
LOG("Failed to allocate memory");
goto bail;
}
- artnet_fd[data->fd_index].output_instance[artnet_fd[data->fd_index].output_instances] = id;
- artnet_fd[data->fd_index].last_frame[artnet_fd[data->fd_index].output_instances] = 0;
+ artnet_fd[data->fd_index].output_instance[artnet_fd[data->fd_index].output_instances].label = id.label;
+ artnet_fd[data->fd_index].output_instance[artnet_fd[data->fd_index].output_instances].last_frame = 0;
+ artnet_fd[data->fd_index].output_instance[artnet_fd[data->fd_index].output_instances].mark = 0;
artnet_fd[data->fd_index].output_instances++;
}
@@ -443,7 +474,6 @@ static int artnet_shutdown(size_t n, instance** inst){
for(p = 0; p < artnet_fds; p++){
close(artnet_fd[p].fd);
free(artnet_fd[p].output_instance);
- free(artnet_fd[p].last_frame);
}
free(artnet_fd);
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)
diff --git a/backends/artnet.md b/backends/artnet.md
index 90a7697..7e1ecff 100644
--- a/backends/artnet.md
+++ b/backends/artnet.md
@@ -36,6 +36,3 @@ net1.1+2 > net2.5+123
A normal channel that is part of a wide channel can not be mapped individually.
#### Known bugs / problems
-
-The minimum inter-frame-time is disregarded, as the packet rate is determined by the rate of incoming
-channel events. \ No newline at end of file
generated by cgit v1.2.3 (git 2.25.1) at 2025-10-31 02:39:13 +0000