From 5e536319b77548718c6b7bdd770cdbce3f5bcf3b Mon Sep 17 00:00:00 2001
From: Paul Batchelor <thisispaulbatchelor@gmail.com>
Date: Sat, 4 Mar 2017 22:10:36 -0800
Subject: [PATCH] when rendering, use dummy Audio/MIDI devices

---
 include/Mixer.h     |  2 +-
 src/core/Engine.cpp |  2 +-
 src/core/Mixer.cpp  | 14 +++++++++++---
 3 files changed, 13 insertions(+), 5 deletions(-)

diff --git a/include/Mixer.h b/include/Mixer.h
index d25da0d6b..a57bf125d 100644
--- a/include/Mixer.h
+++ b/include/Mixer.h
@@ -157,7 +157,7 @@ public:
 		}
 	} ;
 
-	void initDevices();
+	void initDevices( bool renderOnly );
 	void clear();
 
 
diff --git a/src/core/Engine.cpp b/src/core/Engine.cpp
index b5ba50194..27656b90f 100644
--- a/src/core/Engine.cpp
+++ b/src/core/Engine.cpp
@@ -70,7 +70,7 @@ void LmmsCore::init( bool renderOnly )
 	s_projectJournal->setJournalling( true );
 
 	emit engine->initProgress(tr("Opening audio and midi devices"));
-	s_mixer->initDevices();
+	s_mixer->initDevices( renderOnly );
 
 	PresetPreviewPlayHandle::init();
 	s_dummyTC = new DummyTrackContainer;
diff --git a/src/core/Mixer.cpp b/src/core/Mixer.cpp
index 33ffe45a8..03845316d 100644
--- a/src/core/Mixer.cpp
+++ b/src/core/Mixer.cpp
@@ -203,10 +203,18 @@ Mixer::~Mixer()
 
 
 
-void Mixer::initDevices()
+void Mixer::initDevices( bool renderOnly )
 {
-	m_audioDev = tryAudioDevices();
-	m_midiClient = tryMidiClients();
+	bool success_ful = false;
+	if( renderOnly ) {
+		m_audioDev = new AudioDummy( success_ful, this );
+		m_audioDevName = AudioDummy::name();
+		m_midiClient = new MidiDummy;
+		m_midiClientName = MidiDummy::name();
+	} else {
+		m_audioDev = tryAudioDevices();
+		m_midiClient = tryMidiClients();
+	}
 }