Clean up and shave some overhead from port value broadcasting.

Clean up duplex port code and document weird semantics.


git-svn-id: http://svn.drobilla.net/lad/trunk/ingen@2075 a436a847-0d15-0410-975c-d299462d15a1

6 files changed, 57 insertions, 61 deletions

diff --git a/src/engine/DuplexPort.cpp b/src/engine/DuplexPort.cpp
index 195d0468..2c4e81b9 100644
--- a/src/engine/DuplexPort.cpp
+++ b/src/engine/DuplexPort.cpp
@@ -52,30 +52,25 @@ DuplexPort::DuplexPort(
 }
 
 
+/** Prepare for the execution of parent patch */
 void
 DuplexPort::pre_process(ProcessContext& context)
 {
-	// <BrainHurt>
-
 	/*cerr << endl << "{ duplex pre" << endl;
 	cerr << path() << " duplex pre: fixed buffers: " << fixed_buffers() << endl;
 	cerr << path() << " duplex pre: buffer: " << buffer(0) << endl;
 	cerr << path() << " duplex pre: is_output: " << _is_output << " { " << endl;*/
 
+	// If we're a patch output, prepare buffers for write (so plugins can deliver to them)
 	if (_is_output) {
-
 		for (uint32_t i=0; i < _poly; ++i)
 			if (!_buffers->at(i)->is_joined())
 				_buffers->at(i)->prepare_write(context.start(), context.nframes());
 
+	// Otherwise, we're a patch input, do whatever a normal node's input port does
+	// (mix down inputs from an outside "patch is a node" perspective)
 	} else {
-
 		InputPort::pre_process(context);
-
-		for (uint32_t i=0; i < _poly; ++i)
-			_buffers->at(i)->prepare_read(context.start(), context.nframes());
-
-		broadcast(context);
 	}
 
 	/*if (type() == DataType::EVENT)
@@ -84,18 +79,14 @@ DuplexPort::pre_process(ProcessContext& context)
 				<< ((EventBuffer*)buffer(i))->event_count()
 				<< ", joined: " << _buffers->at(i)->is_joined()
 				<< ", is_output: " << _is_output << endl;*/
-
 	//cerr << "} duplex pre " << path() << endl;
-
-	// </BrainHurt>
 }
 
 
+/** Finalize after the execution of parent patch (deliver outputs) */
 void
 DuplexPort::post_process(ProcessContext& context)
 {
-	// <BrainHurt>
-
 	/*cerr << endl << "{ duplex post" << endl;
 	cerr << path() << " duplex post: fixed buffers: " << fixed_buffers() << endl;
 	cerr << path() << " duplex post: buffer: " << buffer(0) << endl;
@@ -107,14 +98,19 @@ DuplexPort::post_process(ProcessContext& context)
 				<< ((EventBuffer*)buffer(i))->event_count()
 				<< ", joined: " << _buffers->at(i)->is_joined() << endl;*/
 
+	// If we're a patch output
+
+
 	if (_is_output) {
-		InputPort::pre_process(context); // Mix down inputs
-		broadcast(context);
+		// Then we've been delivered to as an input (internal perspective)
+		// Mix down this input so patch output ports (external perspective) are ready
+		InputPort::pre_process(context);
+
+		if (_broadcast)
+			broadcast_value(context, false);
 	}
 
 	//cerr << "} duplex post " << path() << endl;
-
-	// </BrainHurt>
 }
 
 
diff --git a/src/engine/InputPort.cpp b/src/engine/InputPort.cpp
index c42de5c6..09132b6e 100644
--- a/src/engine/InputPort.cpp
+++ b/src/engine/InputPort.cpp
@@ -263,14 +263,15 @@ InputPort::pre_process(ProcessContext& context)
 
 	for (uint32_t i=0; i < _poly; ++i)
 		buffer(i)->prepare_read(context.start(), context.nframes());
+
+	if (_broadcast)
+		broadcast_value(context, false);
 }
 
 
 void
 InputPort::post_process(ProcessContext& context)
 {
-	broadcast(context);
-
 	// Prepare buffers for next cycle
 	if (!can_direct())
 		for (uint32_t i=0; i < _poly; ++i)
diff --git a/src/engine/OutputPort.cpp b/src/engine/OutputPort.cpp
index 020ea6bb..023d5a21 100644
--- a/src/engine/OutputPort.cpp
+++ b/src/engine/OutputPort.cpp
@@ -62,7 +62,8 @@ OutputPort::post_process(ProcessContext& context)
 
 	//cerr << path() << " output post: buffer: " << buffer(0) << endl;
 
-	broadcast(context);
+	if (_broadcast)
+		broadcast_value(context, false);
 }
 
 
diff --git a/src/engine/PortImpl.cpp b/src/engine/PortImpl.cpp
index 6b0bfcad..05fcfe67 100644
--- a/src/engine/PortImpl.cpp
+++ b/src/engine/PortImpl.cpp
@@ -177,29 +177,28 @@ PortImpl::clear_buffers()
 void
 PortImpl::broadcast_value(ProcessContext& context, bool force)
 {
-	if (_type == DataType::CONTROL || _type == DataType::AUDIO) {
-		const Sample value = ((AudioBuffer*)buffer(0))->value_at(0);
-		if (force || value != _last_broadcasted_value) {
-			const Events::SendPortValue ev(context.engine(), context.start(), this, false, 0, value);
-			context.event_sink().write(sizeof(ev), &ev);
-			_last_broadcasted_value = value;
+	switch (_type.symbol()) {
+	case DataType::UNKNOWN:
+		break;
+	case DataType::AUDIO:
+	case DataType::CONTROL:
+		{
+			const Sample val = ((AudioBuffer*)buffer(0))->value_at(0);
+			if (force || val != _last_broadcasted_value) {
+				_last_broadcasted_value = val;
+				const Events::SendPortValue ev(context.engine(), context.start(), this, false, 0, val);
+				context.event_sink().write(sizeof(ev), &ev);
+			}
 		}
-	} else if (_type == DataType::EVENT) {
+		break;
+	case DataType::EVENT:
 		if (((EventBuffer*)buffer(0))->event_count() > 0) {
 			const Events::SendPortActivity ev(context.engine(), context.start(), this);
 			context.event_sink().write(sizeof(ev), &ev);
 		}
+		break;
 	}
 }
 
 
-void
-PortImpl::broadcast(ProcessContext& context)
-{
-	if (_broadcast)
-		broadcast_value(context);
-}
-
-
-
 } // namespace Ingen
diff --git a/src/engine/PortImpl.hpp b/src/engine/PortImpl.hpp
index d58e2b7d..986e8233 100644
--- a/src/engine/PortImpl.hpp
+++ b/src/engine/PortImpl.hpp
@@ -130,7 +130,6 @@ protected:
 
 	virtual void allocate_buffers();
 	virtual void connect_buffers();
-	virtual void broadcast(ProcessContext& context);
 
 	uint32_t         _index;
 	uint32_t         _poly;
diff --git a/src/engine/events/SetMetadata.cpp b/src/engine/events/SetMetadata.cpp
index bc73e793..e991bcf5 100644
--- a/src/engine/events/SetMetadata.cpp
+++ b/src/engine/events/SetMetadata.cpp
@@ -185,30 +185,30 @@ SetMetadata::execute(ProcessContext& context)
 		PortImpl*         port   = 0;
 		GraphObjectImpl*  object = 0;
 		switch (*t) {
-			case ENABLE_BROADCAST:
-				if ((port = dynamic_cast<PortImpl*>(_object)))
-					port->broadcast(value.get_bool());
-				break;
-			case ENABLE:
-				if (value.get_bool()) {
-					if (!_patch->compiled_patch())
-						_patch->compiled_patch(_compiled_patch);
-					_patch->enable();
-				} else {
-					_patch->disable();
-				}
-				break;
-			case POLYPHONIC:
-				if ((object = dynamic_cast<GraphObjectImpl*>(_object)))
-					if (!object->set_polyphonic(*_engine.maid(), value.get_bool()))
-						_error = INTERNAL;
-				break;
-			case POLYPHONY:
-				if (!_patch->apply_internal_poly(*_engine.maid(), value.get_int32()))
+		case ENABLE_BROADCAST:
+			if ((port = dynamic_cast<PortImpl*>(_object)))
+				port->broadcast(value.get_bool());
+			break;
+		case ENABLE:
+			if (value.get_bool()) {
+				if (!_patch->compiled_patch())
+					_patch->compiled_patch(_compiled_patch);
+				_patch->enable();
+			} else {
+				_patch->disable();
+			}
+			break;
+		case POLYPHONIC:
+			if ((object = dynamic_cast<GraphObjectImpl*>(_object)))
+				if (!object->set_polyphonic(*_engine.maid(), value.get_bool()))
 					_error = INTERNAL;
-				break;
-			default:
-				_success = true;
+			break;
+		case POLYPHONY:
+			if (!_patch->apply_internal_poly(*_engine.maid(), value.get_int32()))
+				_error = INTERNAL;
+			break;
+		default:
+			_success = true;
 		}
 	}