From ed55916e772264dc8278fc8c96d4139aec31e89e Mon Sep 17 00:00:00 2001
From: cbdev <cb@cbcdn.com>
Date: Mon, 5 Jun 2017 16:37:02 +0200
Subject: Backend channel spec parsing

---
 artnet.c      |  9 ++++++---
 midi.c        | 61 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++--
 midimonster.c | 13 +++++++++++++
 monster.cfg   |  3 ++-
 4 files changed, 80 insertions(+), 6 deletions(-)

diff --git a/artnet.c b/artnet.c
index 1fe8fb2..2684d46 100644
--- a/artnet.c
+++ b/artnet.c
@@ -80,9 +80,12 @@ static int artnet_configure_instance(instance* instance, char* option, char* val
 }
 
 static channel* artnet_channel(instance* instance, char* spec){
-	fprintf(stderr, "Parsing ArtNet channelspec %s\n", spec);
-	//TODO
-	return NULL;
+	unsigned channel = strtoul(spec, NULL, 10);
+	if(channel > 512 || channel < 1){
+		fprintf(stderr, "Invalid ArtNet channel %s\n", spec);
+		return NULL;
+	}
+	return mm_channel(instance, channel);
 }
 
 static int artnet_set(size_t num, channel* c, channel_value* v){
diff --git a/midi.c b/midi.c
index 0d51d38..3cd8507 100644
--- a/midi.c
+++ b/midi.c
@@ -5,6 +5,18 @@
 #define BACKEND_NAME "midi"
 static snd_seq_t* sequencer = NULL;
 
+/*
+ * TODO
+ * 	Optionally send note-off messages
+ */
+
+enum /*_midi_channel_type*/ {
+	none = 0,
+	note,
+	cc,
+	sysmsg
+};
+
 int midi_init(){
 	backend midi = {
 		.name = BACKEND_NAME,
@@ -68,8 +80,53 @@ static int midi_configure_instance(instance* instance, char* option, char* value
 }
 
 static channel* midi_channel(instance* instance, char* spec){
-	fprintf(stderr, "Parsing MIDI channelspec %s\n", spec);
-	//TODO
+	union {
+		struct {
+			uint8_t pad[5];
+			uint8_t type;
+			uint8_t channel;
+			uint8_t control;
+		} fields;
+		uint64_t label;
+	} ident = {
+		.label = 0
+	};
+
+	char* channel;
+
+	if(!strncmp(spec, "cc", 2)){
+		ident.fields.type = cc;
+		channel = spec + 2;
+	}
+	else if(!strncmp(spec, "note", 4)){
+		ident.fields.type = note;
+		channel = spec + 4;
+	}
+	else{
+		fprintf(stderr, "Unknown MIDI channel specification %s\n", spec);
+		return NULL;
+	}
+
+	ident.fields.channel = strtoul(channel, &channel, 10);
+
+	//FIXME test this
+	if(ident.fields.channel > 16){
+		fprintf(stderr, "Channel out of range in channel spec %s\n", spec);
+		return NULL;
+	}
+
+	if(*channel != '.'){
+		fprintf(stderr, "Need MIDI channel specification of form channel.control, had %s\n", spec);
+		return NULL;
+	}
+	channel++;
+
+	ident.fields.control = strtoul(channel, NULL, 10);
+
+	if(ident.label){
+		return mm_channel(instance, ident.label);
+	}
+
 	return NULL;
 }
 
diff --git a/midimonster.c b/midimonster.c
index aeaf04d..367ca6f 100644
--- a/midimonster.c
+++ b/midimonster.c
@@ -50,6 +50,16 @@ int mm_map_channel(channel* from, channel* to){
 	return 0;
 }
 
+void map_free(){
+	size_t u;
+	for(u = 0; u < mappings; u++){
+		free(map[u].to);
+	}
+	free(map);
+	mappings = 0;
+	map = NULL;
+}
+
 int usage(char* fn){
 	fprintf(stderr, "MIDIMonster v0.1\n");
 	fprintf(stderr, "Usage:\n");
@@ -75,7 +85,9 @@ int main(int argc, char** argv){
 	if(config_read(cfg_file)){
 		fprintf(stderr, "Failed to read configuration file %s\n", cfg_file);
 		backends_stop();
+		channels_free();
 		instances_free();
+		map_free();
 		return usage(argv[0]);
 	}
 
@@ -93,6 +105,7 @@ bail:
 	backends_stop();
 	channels_free();
 	instances_free();
+	map_free();
 
 	return rv;
 }
diff --git a/monster.cfg b/monster.cfg
index b638e56..eb65a07 100644
--- a/monster.cfg
+++ b/monster.cfg
@@ -28,5 +28,6 @@ output = true
 net = 0
 
 [map]
-net1.231 = lc1.cc5
+net1.231 = foo.1
+net1.255 = lc1.cc1.1
 ;net1.231 = osc.f/channel5/ toggle=127
-- 
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