From a51daedbe6cf59bb202496efc9bcba6867e6bb5e Mon Sep 17 00:00:00 2001
From: Robin Gareus <robin@gareus.org>
Date: Tue, 4 Oct 2016 21:31:29 +0200
Subject: [PATCH] Vamp::Plugins::process Lua bindings

---
 libs/ardour/ardour/lua_api.h | 12 ++++++++++++
 libs/ardour/lua_api.cc       | 10 ++++++++++
 libs/ardour/luabindings.cc   |  8 ++++++--
 3 files changed, 28 insertions(+), 2 deletions(-)

diff --git a/libs/ardour/ardour/lua_api.h b/libs/ardour/ardour/lua_api.h
index 5974a96b6d..a049be2768 100644
--- a/libs/ardour/ardour/lua_api.h
+++ b/libs/ardour/ardour/lua_api.h
@@ -214,6 +214,18 @@ namespace ARDOUR { namespace LuaAPI {
 
 			bool initialized () const { return _initialized; }
 
+			/** process given array of audio-samples.
+			 *
+			 * This is a lua-binding for vamp:plugin():process ()
+			 *
+			 * @d audio-data, the vector must match the configured channel count
+			 *    and hold a complete buffer for every channel as set during
+			 *    plugin():initialise()
+			 * @rt timestamp matching the provided buffer.
+			 * @returns features extracted from that data (if the plugin is causal)
+			 */
+			::Vamp::Plugin::FeatureSet process (const std::vector<float*>& d, ::Vamp::RealTime rt);
+
 		private:
 			::Vamp::Plugin* _plugin;
 			float           _sample_rate;
diff --git a/libs/ardour/lua_api.cc b/libs/ardour/lua_api.cc
index f6df554fd2..3fc5a5cf89 100644
--- a/libs/ardour/lua_api.cc
+++ b/libs/ardour/lua_api.cc
@@ -629,3 +629,13 @@ LuaAPI::Vamp::analyze (boost::shared_ptr<ARDOUR::Readable> r, uint32_t channel,
 	delete [] data;
 	return rv;
 }
+
+::Vamp::Plugin::FeatureSet
+LuaAPI::Vamp::process (const std::vector<float*>& d, ::Vamp::RealTime rt)
+{
+	if (!_plugin || d.size() == 0) {
+		return ::Vamp::Plugin::FeatureSet ();
+	}
+	const float* const* bufs = &d[0];
+	return _plugin->process (bufs, rt);
+}
diff --git a/libs/ardour/luabindings.cc b/libs/ardour/luabindings.cc
index aa4e1543db..8e1063ba6c 100644
--- a/libs/ardour/luabindings.cc
+++ b/libs/ardour/luabindings.cc
@@ -265,6 +265,10 @@ LuaBindings::stddef (lua_State* L)
 	// register float array (int32_t*)
 		.registerArray <int32_t> ("IntArray")
 
+	// std::vector<float*>
+		.beginStdVector <float*> ("FloatArrayVector")
+		.endClass ()
+
 	// TODO std::set
 		.endNamespace ();
 }
@@ -502,8 +506,7 @@ LuaBindings::common (lua_State* L)
 		.endNamespace () // Vamp::PluginBase
 
 		.deriveClass<Vamp::Plugin, Vamp::PluginBase> ("Plugin")
-		// TODO add wrapper std::vector<FloatArray>
-		.addFunction ("process", &Vamp::Plugin::process) // XXX unusable due to  float * const *
+		//.addFunction ("process", &Vamp::Plugin::process) // unusable due to  float*const* -> LuaAPI::Vamp::process
 		.addFunction ("getRemainingFeatures", &Vamp::Plugin::getRemainingFeatures)
 		.endClass ()
 
@@ -1609,6 +1612,7 @@ LuaBindings::common (lua_State* L)
 		.addFunction ("analyze", &ARDOUR::LuaAPI::Vamp::analyze)
 		.addFunction ("reset", &ARDOUR::LuaAPI::Vamp::reset)
 		.addFunction ("initialize", &ARDOUR::LuaAPI::Vamp::initialize)
+		.addFunction ("process", &ARDOUR::LuaAPI::Vamp::process)
 		.endClass ()
 
 		.endNamespace () // end LuaAPI
-- 
2.30.2