From c14c1c2bf3d6e5c33a65c83f67b4853bd2faedfc Mon Sep 17 00:00:00 2001
From: Paul Davis <paul@linuxaudiosystems.com>
Date: Wed, 11 Nov 2009 19:09:24 +0000
Subject: better/correct AU transport state callback ; debug info for AU I/O
 configs

git-svn-id: svn://localhost/ardour2/branches/2.0-ongoing@6063 d708f5d6-7413-0410-9779-e7cbd77b26cf
---
 libs/ardour/ardour/audio_unit.h |  3 +++
 libs/ardour/audio_unit.cc       | 59 +++++++++++++++++++++++++++++++++--------
 libs/ardour/audioengine.cc      |  2 +-
 3 files changed, 52 insertions(+), 12 deletions(-)

(limited to 'libs')

diff --git a/libs/ardour/ardour/audio_unit.h b/libs/ardour/ardour/audio_unit.h
index f3c21cce78..08a5ddd0c8 100644
--- a/libs/ardour/ardour/audio_unit.h
+++ b/libs/ardour/ardour/audio_unit.h
@@ -177,6 +177,9 @@ class AUPlugin : public ARDOUR::Plugin
 	void init ();
 
 	void discover_factory_presets ();
+
+	bool      last_transport_rolling;
+	float     last_transport_speed;
 };
 	
 typedef boost::shared_ptr<AUPlugin> AUPluginPtr;
diff --git a/libs/ardour/audio_unit.cc b/libs/ardour/audio_unit.cc
index ded4dea85b..6524e83508 100644
--- a/libs/ardour/audio_unit.cc
+++ b/libs/ardour/audio_unit.cc
@@ -66,6 +66,7 @@ AUPluginInfo::CachedInfoMap AUPluginInfo::cached_info;
 static string preset_search_path = "/Library/Audio/Presets:/Network/Library/Audio/Presets";
 static string preset_suffix = ".aupreset";
 static bool preset_search_path_initialized = false;
+static bool debug_io_config = true;
 
 static OSStatus 
 _render_callback(void *userData,
@@ -335,14 +336,16 @@ Boolean ComponentAndDescriptionMatch_Loosely(Component inComponent, const Compon
 
 AUPlugin::AUPlugin (AudioEngine& engine, Session& session, boost::shared_ptr<CAComponent> _comp)
 	: Plugin (engine, session),
-	  comp (_comp),
-	  unit (new CAAudioUnit),
-	  initialized (false),
-	  buffers (0),
-	  current_maxbuf (0),
-	  current_offset (0),
-	  current_buffers (0),
-	frames_processed (0)
+	, comp (_comp)
+	, unit (new CAAudioUnit)
+	, initialized (false)
+	, buffers (0)
+	, current_maxbuf (0)
+	, current_offset (0)
+	, current_buffers (0)
+	, frames_processed (0)
+	, last_transport_rolling (false)
+	, last_transport_speed (0.0)
 {			
 	if (!preset_search_path_initialized) {
 		Glib::ustring p = Glib::get_home_dir();
@@ -781,11 +784,19 @@ AUPlugin::can_do (int32_t in, int32_t& out)
 
 	vector<pair<int,int> >& io_configs = pinfo->cache.io_configs;
 
+	if (debug_io_config) {
+		cerr << name() << " has " << io_configs.size() << " IO Configurations\n";
+	}
+
 	for (vector<pair<int,int> >::iterator i = io_configs.begin(); i != io_configs.end(); ++i) {
 
 		int32_t possible_in = i->first;
 		int32_t possible_out = i->second;
 
+		if (debug_io_config) {
+			cerr << "\tin " << possible_in << " out " << possible_out << endl;
+		}
+
 		if (possible_out == 0) {
 			warning << string_compose (_("AU %1 has zero outputs - configuration ignored"), name()) << endmsg;
 			continue;
@@ -916,6 +927,14 @@ AUPlugin::can_do (int32_t in, int32_t& out)
 
 	}
 
+	if (debug_io_config) {
+		if (plugcnt > 0) {
+			cerr << "\tCHOSEN: in " << in << " out " << out << " plugcnt will be " << plugcnt << endl;
+		} else {
+			cerr << "\tFAIL: no configs match requested in " << in << endl;
+		}
+	}
+
 	return plugcnt;
 }
 
@@ -1148,16 +1167,31 @@ AUPlugin::get_transport_state_callback (Boolean*  outIsPlaying,
 					Float64*  outCycleStartBeat,
 					Float64*  outCycleEndBeat)
 {
+	bool rolling;
+	float speed;
+
+	rolling = _session->transport_rolling();
+	speed = _session->transport_speed ();
+
 	if (outIsPlaying) {
 		*outIsPlaying = _session.transport_rolling();
 	}
 
 	if (outTransportStateChanged) {
-		*outTransportStateChanged = false;
+		if (rolling != last_transport_rolling) {
+			*outTransportStateChanged = true;
+		} else if (speed != last_transport_speed) {
+			*outTransportStateChanged = true;
+		} else {
+			*outTransportStateChanged = false;
+		}
 	}
 
 	if (outCurrentSampleInTimeLine) {
-		*outCurrentSampleInTimeLine = _session.transport_frame();
+		/* this assumes that the AU can only call this host callback from render context,
+		   where current_offset is valid.
+		*/
+		*outCurrentSampleInTimeLine = _session.transport_frame() + current_offset;
 	}
 
 	if (outIsCycling) {
@@ -1207,7 +1241,10 @@ AUPlugin::get_transport_state_callback (Boolean*  outIsPlaying,
 			}
 		}
 	}
-		
+
+	last_transport_rolling = rolling;
+	last_transport_speed = speed;
+
 	return noErr;
 }
 
diff --git a/libs/ardour/audioengine.cc b/libs/ardour/audioengine.cc
index 84e31786a9..9c7789eb06 100644
--- a/libs/ardour/audioengine.cc
+++ b/libs/ardour/audioengine.cc
@@ -857,7 +857,7 @@ AudioEngine::halted_info (jack_status_t code, const char* reason, void *arg)
 			ae->Halted(""); /* EMIT SIGNAL */
 		}
 #else
-			ae->Halted(""); /* EMIT SIGNAL */
+		ae->Halted(""); /* EMIT SIGNAL */
 #endif
 	}
 }
-- 
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