Fix note delete crash bug.

Fix midi recording crash bug.


git-svn-id: svn://localhost/ardour2/trunk@2216 d708f5d6-7413-0410-9779-e7cbd77b26cf

libs/ardour/ardour/midi_source.h

@@ -90,6 +90,7 @@ class MidiSource : public Source
 
 	boost::shared_ptr<MidiModel> _model;
 	bool                         _model_loaded;
+	bool                         _writing;
 
   private:
 	bool file_changed (string path);

libs/ardour/midi_source.cc

@@ -46,6 +46,7 @@ MidiSource::MidiSource (Session& s, string name)
 	: Source (s, name, DataType::MIDI)
 	, _model(new MidiModel(s))
 	, _model_loaded (false)
+	, _writing (false)
 {
 	_read_data_count = 0;
 	_write_data_count = 0;
@@ -55,6 +56,7 @@ MidiSource::MidiSource (Session& s, const XMLNode& node)
 	: Source (s, node)
 	, _model(new MidiModel(s))
 	, _model_loaded (false)
+	, _writing (false)
 {
 	_read_data_count = 0;
 	_write_data_count = 0;
@@ -131,6 +133,8 @@ MidiSource::mark_streaming_midi_write_started (NoteMode mode)
 		_model->set_note_mode(mode);
 		_model->start_write();
 	}
+	
+	_writing = true;
 }
 
 void
@@ -138,6 +142,8 @@ MidiSource::mark_streaming_write_started ()
 {
 	if (_model)
 		_model->start_write();
+
+	_writing = true;
 }
 
 void
@@ -145,5 +151,7 @@ MidiSource::mark_streaming_write_completed ()
 {
 	if (_model)
 		_model->end_write(false); // FIXME: param?
+
+	_writing = false;
 }
 

libs/ardour/smf_source.cc

@@ -796,6 +796,9 @@ SMFSource::read_var_len() const
 void
 SMFSource::load_model(bool lock, bool force_reload)
 {
+	if (_writing)
+		return;
+
 	if (lock)
 		Glib::Mutex::Lock lm (_lock);