Implement channel mapping

1 files changed, 43 insertions, 0 deletions

diff --git a/midimonster.c b/midimonster.c
index e59b7f9..aeaf04d 100644
--- a/midimonster.c
+++ b/midimonster.c
@@ -8,6 +8,48 @@ int artnet_init();
 int midi_init();
 int osc_init();
 
+static size_t mappings = 0;
+static channel_mapping* map = NULL;
+
+int mm_map_channel(channel* from, channel* to){
+	size_t u, m;
+	//find existing source mapping
+	for(u = 0; u < mappings; u++){
+		if(map[u].from == from){
+			break;
+		}
+	}
+
+	//create new entry
+	if(u == mappings){
+		map = realloc(map, (mappings + 1) * sizeof(channel_mapping));
+		if(!map){
+			fprintf(stderr, "Failed to allocate memory\n");
+			return 1;
+		}
+		memset(map + mappings, 0, sizeof(channel_mapping));
+		mappings++;
+	}
+
+	//check whether the target is already mapped
+	for(m = 0; m < map[u].destinations; m++){
+		if(map[u].to[m] == to){
+			return 0;
+		}
+	}
+
+	map[u].to = realloc(map[u].to, (map[u].destinations + 1) * sizeof(channel*));
+	if(!map[u].to){
+		fprintf(stderr, "Failed to allocate memory\n");
+		map[u].destinations = 0;
+		return 1;
+	}
+
+	map[u].to[map[u].destinations] = to;
+	map[u].destinations++;
+	return 0;
+}
+
 int usage(char* fn){
 	fprintf(stderr, "MIDIMonster v0.1\n");
 	fprintf(stderr, "Usage:\n");
@@ -49,6 +91,7 @@ int main(int argc, char** argv){
 bail:
 	//free all data
 	backends_stop();
+	channels_free();
 	instances_free();
 
 	return rv;