4 files changed, 62 insertions, 9 deletions

diff --git a/src/server/BlockImpl.cpp b/src/server/BlockImpl.cpp
index 069ecdfa..3d684e6c 100644
--- a/src/server/BlockImpl.cpp
+++ b/src/server/BlockImpl.cpp
@@ -45,6 +45,7 @@ BlockImpl::BlockImpl(PluginImpl*         plugin,
 	, _polyphony((polyphonic && parent) ? parent->internal_poly() : 1)
 	, _polyphonic(polyphonic)
 	, _activated(false)
+	, _enabled(true)
 	, _traversed(false)
 {
 	assert(_plugin);
@@ -144,6 +145,21 @@ BlockImpl::set_buffer_size(Context&       context,
 	}
 }
 
+PortImpl*
+BlockImpl::nth_port_by_type(uint32_t n, bool input, PortType type)
+{
+	uint32_t count = 0;
+	for (uint32_t i = 0; _ports && i < _ports->size(); ++i) {
+		PortImpl* const port = _ports->at(i);
+		if (port->is_input() == input && port->type() == type) {
+			if (count++ == n) {
+				return port;
+			}
+		}
+	}
+	return NULL;
+}
+
 void
 BlockImpl::pre_process(ProcessContext& context)
 {
@@ -160,6 +176,24 @@ BlockImpl::process(ProcessContext& context)
 {
 	pre_process(context);
 
+	if (!_enabled) {
+		for (PortType t : { PortType::AUDIO, PortType::CV, PortType::ATOM }) {
+			for (uint32_t i = 0;; ++i) {
+				PortImpl* in = nth_port_by_type(i, true, t);
+				PortImpl* out;
+				if (in && (out = nth_port_by_type(i, false, t))) {
+					for (uint32_t v = 0; v < _polyphony; ++v) {
+						out->buffer(v)->copy(context, in->buffer(v).get());
+					}
+				} else {
+					break;
+				}
+			}
+		}
+		post_process(context);
+		return;
+	}
+
 	ProcessContext subcontext(context);
 	for (SampleCount offset = 0; offset < context.nframes();) {
 		// Find earliest offset of a value change
diff --git a/src/server/BlockImpl.hpp b/src/server/BlockImpl.hpp
index 58ced1fe..845cd7df 100644
--- a/src/server/BlockImpl.hpp
+++ b/src/server/BlockImpl.hpp
@@ -84,7 +84,13 @@ public:
 	virtual void deactivate();
 
 	/** Return true iff this block is activated */
-	bool activated() { return _activated; }
+	bool activated() const { return _activated; }
+
+	/** Return true iff this block is enabled (not bypassed). */
+	bool enabled() const { return _enabled; }
+
+	/** Enable or disable (bypass) this block. */
+	void set_enabled(bool e) { _enabled = e; }
 
 	/** Learn the next incoming MIDI event (for internals) */
 	virtual void learn() {}
@@ -157,6 +163,8 @@ public:
 	void traversed(bool b) { _traversed = b; }
 
 protected:
+	PortImpl* nth_port_by_type(uint32_t n, bool input, PortType type);
+
 	PluginImpl*             _plugin;
 	Raul::Array<PortImpl*>* _ports; ///< Access in audio thread only
 	Context::ID             _context; ///< Context this block runs in
@@ -165,6 +173,7 @@ protected:
 	std::list<BlockImpl*>   _dependants; ///< Blocks this one's output ports are connected to
 	bool                    _polyphonic;
 	bool                    _activated;
+	bool                    _enabled;
 	bool                    _traversed; ///< Flag for process order algorithm
 };
 
diff --git a/src/server/PortType.hpp b/src/server/PortType.hpp
index b1719e3b..8371bd2c 100644
--- a/src/server/PortType.hpp
+++ b/src/server/PortType.hpp
@@ -58,8 +58,8 @@ public:
 
 	PortType(ID id) : _id(id) {}
 
-	inline const Raul::URI& uri()    const { return type_uri(_id); }
-	inline ID               id() const { return _id; }
+	inline const Raul::URI& uri() const { return type_uri(_id); }
+	inline ID               id()  const { return _id; }
 
 	inline bool operator==(const ID& id) const { return (_id == id); }
 	inline bool operator!=(const ID& id) const { return (_id != id); }
diff --git a/src/server/events/Delta.cpp b/src/server/events/Delta.cpp
index c3d4e458..f1acbdc2 100644
--- a/src/server/events/Delta.cpp
+++ b/src/server/events/Delta.cpp
@@ -209,6 +209,12 @@ Delta::pre_process()
 			} else if ((block = dynamic_cast<BlockImpl*>(_object))) {
 				if (key == uris.midi_binding && value == uris.patch_wildcard) {
 					op = SpecialType::CONTROL_BINDING;  // Internal block learn
+				} else if (key == uris.ingen_enabled) {
+					if (value.type() == uris.forge.Bool) {
+						op = SpecialType::ENABLE;
+					} else {
+						_status = Status::BAD_VALUE_TYPE;
+					}
 				}
 			}
 
@@ -316,13 +322,17 @@ Delta::execute(ProcessContext& context)
 			}
 			break;
 		case SpecialType::ENABLE:
-			if (value.get<int32_t>()) {
-				if (_compiled_graph) {
-					_graph->set_compiled_graph(_compiled_graph);
+			if (_graph) {
+				if (value.get<int32_t>()) {
+					if (_compiled_graph) {
+						_graph->set_compiled_graph(_compiled_graph);
+					}
+					_graph->enable();
+				} else {
+					_graph->disable(context);
 				}
-				_graph->enable();
-			} else {
-				_graph->disable(context);
+			} else if (block) {
+				block->set_enabled(value.get<int32_t>());
 			}
 			break;
 		case SpecialType::POLYPHONIC: {