3 files changed, 62 insertions, 3 deletions
diff --git a/backends/visca.c b/backends/visca.c
index d408b80..32f11c9 100644
--- a/backends/visca.c
+++ b/backends/visca.c
@@ -8,6 +8,7 @@
 /* TODO
  *	VISCA server
  *	Rate limiting
+ *	Inquiry
  */
 
 MM_PLUGIN_API int init(){
@@ -175,6 +176,13 @@ static size_t ptz_set_ptspeed(instance* inst, channel* c, channel_value* v, uint
 	return 0;
 }
 
+static size_t ptz_set_stop(instance* inst, channel* c, channel_value* v, uint8_t* msg){
+	ptz_instance_data* data = (ptz_instance_data*) inst->impl;
+	msg[4] = data->panspeed;
+	msg[5] = data->tiltspeed;
+	return ptz_channels[stop].bytes;
+}
+
 static size_t ptz_set_zoom(instance* inst, channel* c, channel_value* v, uint8_t* msg){
 	uint16_t position = ((ptz_channels[zoom].max - ptz_channels[zoom].min) * v->normalised) + ptz_channels[zoom].min - ptz_channels[zoom].offset;
 	msg[4] = ((position & 0xF000) >> 12);
@@ -193,6 +201,24 @@ static size_t ptz_set_focus(instance* inst, channel* c, channel_value* v, uint8_
 	return ptz_channels[focus].bytes;
 }
 
+static size_t ptz_set_focus_mode(instance* inst, channel* c, channel_value* v, uint8_t* msg){
+	msg[4] = (v->normalised > 0.9) ? 2 : 3;
+	return ptz_channels[focus_mode].bytes;
+}
+
+static size_t ptz_set_wb_mode(instance* inst, channel* c, channel_value* v, uint8_t* msg){
+	msg[4] = (v->normalised > 0.9) ? 0 : 5;
+	return ptz_channels[wb_mode].bytes;
+}
+
+static size_t ptz_set_wb(instance* inst, channel* c, channel_value* v, uint8_t* msg){
+	uint8_t command = c->ident & 0xFF;
+	uint8_t value = ((ptz_channels[command].max - ptz_channels[command].min) * v->normalised) + ptz_channels[command].min - ptz_channels[command].offset;
+	msg[6] = value >> 4;
+	msg[7] = value & 0x0F;
+	return ptz_channels[command].bytes;
+}
+
 static size_t ptz_set_memory(instance* inst, channel* c, channel_value* v, uint8_t* msg){
 	if(v->normalised < 0.9){
 		return 0;
@@ -223,6 +249,8 @@ static int ptz_set(instance* inst, size_t num, channel** c, channel_value* v){
 
 		if(ptz_channels[command].bytes){
 			memcpy(tx, ptz_channels[command].pattern, ptz_channels[command].bytes);
+			//if no handler function set, assume a parameterless command and send verbatim
+			bytes = ptz_channels[command].bytes;
 		}
 		tx[0] = 0x80 | (data->cam_address & 0xF);
 
diff --git a/backends/visca.h b/backends/visca.h
index 09c9057..481f5c7 100644
--- a/backends/visca.h
+++ b/backends/visca.h
@@ -28,8 +28,14 @@ enum /*ptz_channels*/ {
 	tiltspeed,
 	zoom,
 	focus,
+	focus_mode,
+	wb_red,
+	wb_blue,
+	wb_mode,
 	call,
 	store,
+	home,
+	stop,
 	sentinel
 };
 
@@ -38,9 +44,15 @@ static size_t ptz_set_pantilt(instance* inst, channel* c, channel_value* v, uint
 static size_t ptz_set_ptspeed(instance* inst, channel* c, channel_value* v, uint8_t* msg);
 static size_t ptz_set_zoom(instance* inst, channel* c, channel_value* v, uint8_t* msg);
 static size_t ptz_set_focus(instance* inst, channel* c, channel_value* v, uint8_t* msg);
+static size_t ptz_set_focus_mode(instance* inst, channel* c, channel_value* v, uint8_t* msg);
+static size_t ptz_set_wb_mode(instance* inst, channel* c, channel_value* v, uint8_t* msg);
+static size_t ptz_set_wb(instance* inst, channel* c, channel_value* v, uint8_t* msg);
 static size_t ptz_set_memory(instance* inst, channel* c, channel_value* v, uint8_t* msg);
 static size_t ptz_set_memory_store(instance* inst, channel* c, channel_value* v, uint8_t* msg);
 
+//relative move test
+static size_t ptz_set_stop(instance* inst, channel* c, channel_value* v, uint8_t* msg);
+
 static struct {
 	char* name;
 	size_t bytes;
@@ -56,6 +68,13 @@ static struct {
 	[tiltspeed] = {"tiltspeed", 0, {0}, 0x01, 0x14, 0, ptz_set_ptspeed},
 	[zoom] = {"zoom", 9, {0x80, 0x01, 0x04, 0x47, 0, 0, 0, 0, 0xFF}, 0, 0x4000, 0, ptz_set_zoom},
 	[focus] = {"focus", 9, {0x80, 0x01, 0x04, 0x48, 0, 0, 0, 0, 0xFF}, 0, 0x4000, 0, ptz_set_focus},
+	[focus_mode] = {"autofocus", 6, {0x80, 0x01, 0x04, 0x38, 0, 0xFF}, 0, 1, 0, ptz_set_focus_mode},
+	[wb_mode] = {"wb.auto", 6, {0x80, 0x01, 0x04, 0x35, 0, 0xFF}, 0, 1, 0, ptz_set_wb_mode},
+	[wb_red] = {"wb.red", 9, {0x80, 0x01, 0x04, 0x43, 0x00, 0x00, 0, 0, 0xFF}, 0, 255, 0, ptz_set_wb},
+	[wb_blue] = {"wb.blue", 9, {0x80, 0x01, 0x04, 0x44, 0x00, 0x00, 0, 0, 0xFF}, 0, 255, 0, ptz_set_wb},
 	[call] = {"memory", 7, {0x80, 0x01, 0x04, 0x3F, 0x02, 0, 0xFF}, 0, 254, 0, ptz_set_memory},
-	[store] = {"store", 7, {0x80, 0x01, 0x04, 0x3F, 0x01, 0, 0xFF}, 0, 254, 0, ptz_set_memory_store}
+	[store] = {"store", 7, {0x80, 0x01, 0x04, 0x3F, 0x01, 0, 0xFF}, 0, 254, 0, ptz_set_memory_store},
+	[home] = {"home", 5, {0x80, 0x01, 0x06, 0x04, 0xFF}, 0, 0, 0, NULL},
+	//relative move test
+	[stop] = {"stop", 9, {0x80, 0x01, 0x06, 0x01, 0, 0, 0x03, 0x03, 0xFF}, 0, 0, 0, ptz_set_stop}
 };
diff --git a/backends/visca.md b/backends/visca.md
index 4fe1933..d4fc432 100644
--- a/backends/visca.md
+++ b/backends/visca.md
@@ -29,6 +29,10 @@ Each instance exposes the following channels
 * `tiltspeed`: Tilt speed
 * `zoom`: Zoom position
 * `focus`: Focus position
+* `autofocus`: Switch between autofocus (events > 0.9) and manual focus drive mode
+* `wb.auto`: Switch between automatic white balance mode (events > 0.9) and manual white balance mode
+* `wb.red`, `wb.blue`: Red/Blue channel white balance gain values
+* `home`: Return to home position
 * `memory<n>`: Call memory <n> (if incoming event value is greater than 0.9)
 * `store<n>`: Store current pan/tilt/zoom setup to memory <n> (if incoming event value is greater than 0.9)
 
@@ -40,12 +44,20 @@ control.tilt > visca.tilt
 control.btn1 > visca.memory1
 ```
 
+#### Compatability list
+
+| Manufacturer	| Exact model(s) tested		| Compatible models				| Result / Notes					|
+|---------------|-------------------------------|-----------------------------------------------|-------------------------------------------------------|
+| ValueHD	| VHD-V61			| Probably all ValueHD Visca-capable devices	| Everything works except for absolute focus control	|
+| PTZOptics	| 				| Probably all of their PTZ cameras		| See ValueHD						|
+
 #### Known bugs / problems
 
 Value readback / Inquiry is not yet implemented. This backend currently only does output.
 
 Some manufacturers use VISCA, but require special framing for command flow control. This may be implemented
-in the future if there is sufficient interest.
+in the future if there is sufficient interest. Some commands may not work with some manufacturer's cameras due to
+different value ranges or command ordering.
 
 Please file a ticket if you can confirm this backend working/nonworking with a new make or model
-of camera so we can add it to the compatability list!
+of camera so we can add it to the compatibility list!