Implement multi-input OFX clip wiring and texture handling

Store PluginJob input values for lookup
Add per-clip texture inputs on plugin nodes
Map input clips to textures during render (with Source fallback)

app/node/node.h

@@ -1303,6 +1303,8 @@ signals:
 
 	void KeyframeTimeChanged(NodeKeyframe *key);
 
+	void MessageCountChanged();
+
 	void KeyframeTypeChanged(NodeKeyframe *key);
 
 	void KeyframeValueChanged(NodeKeyframe *key);

app/node/plugins/Plugin.cpp

@@ -24,6 +24,7 @@ olive::plugin::PluginNode::PluginNode(
 	OFX::Host::ImageEffect::Instance *plugin)
 {
 	plugin_instance_=plugin;
+	bool has_texture_input = false;
 
 	auto params=plugin_instance_->getParams();
 	for (auto param: params) {
@@ -70,6 +71,17 @@ olive::plugin::PluginNode::PluginNode(
 		AddInput(param.second->getName().data(), type);
 	}
 
+	const auto &clips = plugin_instance_->getDescriptor().getClips();
+	for (const auto &entry : clips) {
+		if (entry.first == kOfxImageEffectOutputClipName) {
+			continue;
+		}
+		AddInput(entry.first.data(), NodeValue::kTexture);
+		has_texture_input = true;
+	}
+	if (!has_texture_input) {
+		AddInput(kTextureInput, NodeValue::kTexture);
+	}
 }
 QString olive::plugin::PluginNode::Name() const
 {
@@ -94,9 +106,19 @@ void olive::plugin::PluginNode::Value(const NodeValueRow &value,
 									  const NodeGlobals &globals,
 									  NodeValueTable *table) const
 {
-	TexturePtr tex = value[kTextureInput].toTexture();
+	TexturePtr tex = value.value(kTextureInput).toTexture();
+	if (!tex) {
+		for (auto it = value.cbegin(); it != value.cend(); ++it) {
+			if (it.value().type() == NodeValue::kTexture) {
+				tex = it.value().toTexture();
+				if (tex) {
+					break;
+				}
+			}
+		}
+	}
 	if (tex && plugin_instance_) {
-		PluginJob job(plugin_instance_, value);
+		PluginJob job(plugin_instance_, this, value);
 		table->Push(NodeValue::kTexture, tex->toJob(job), this);
 	}
 }

app/node/plugins/Plugin.h

@@ -20,6 +20,7 @@
 #define PLUGIN_NODES_H
 #include "ofxhImageEffectAPI.h"
 #include "ofxhPluginCache.h"
+#include "ofxImageEffect.h"
 #include "node/node.h"
 
 namespace olive

app/node/traverser.cpp

@@ -382,7 +382,7 @@ TexturePtr NodeTraverser::ProcessVideoCacheJob(const CacheJob *val)
 	return nullptr;
 }
 
-TexturePtr NodeTraverser::ProcessPluginJob(plugin::PluginJob *job)
+TexturePtr NodeTraverser::ProcessPluginJob(TexturePtr texture, TexturePtr destination, const Node *node,)
 {
 	// TODO
 }
@@ -496,7 +496,13 @@ void NodeTraverser::ResolveJobs(NodeValue &val)
 						val.set_value(tex);
 					}
 					else if (plugin::PluginJob* plugin_job=dynamic_cast<plugin::PluginJob*>(base_job)) {
-						ProcessPluginJob(plugin_job);
+						VideoParams tex_params = job_tex->params();
+
+						TexturePtr tex = CreateTexture(tex_params);
+
+						ProcessPluginJob(job_tex, tex, val.source());
+						val.set_value(tex);
+
 					}
 
 					// Cache resolved value

app/node/traverser.h

@@ -144,7 +144,7 @@ protected:
 		return SampleBuffer();
 	}
 
-	virtual TexturePtr ProcessPluginJob(plugin::PluginJob *job);
+	virtual TexturePtr ProcessPluginJob(TexturePtr texture, TexturePtr destination, const Node *node);
 	SampleBuffer CreateSampleBuffer(const AudioParams &params,
 									const rational &length)
 	{