totally untested initial code for MidiPlaylistSource, to provide for compound MIDI regions. putting it into SVN because my system might crash overnight :)

git-svn-id: svn://localhost/ardour2/branches/3.0@9626 d708f5d6-7413-0410-9779-e7cbd77b26cf

1 files changed, 80 insertions, 0 deletions

diff --git a/libs/ardour/ardour/midi_playlist_source.h b/libs/ardour/ardour/midi_playlist_source.h
new file mode 100644
index 0000000000..85f7a960ad
--- /dev/null
+++ b/libs/ardour/ardour/midi_playlist_source.h
@@ -0,0 +1,80 @@
+/*
+    Copyright (C) 2011 Paul Davis
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+*/
+
+#ifndef __ardour_midi_playlist_source_h__
+#define __ardour_midi_playlist_source_h__
+
+#include <string>
+
+#include <boost/shared_ptr.hpp>
+
+#include "ardour/ardour.h"
+#include "ardour/midi_source.h"
+#include "ardour/playlist_source.h"
+
+namespace ARDOUR {
+
+class MidiPlaylist;
+
+class MidiPlaylistSource : public MidiSource, public PlaylistSource {
+  public:
+    virtual ~MidiPlaylistSource ();
+
+    bool empty() const;
+    framecnt_t length (framepos_t) const;
+
+    framecnt_t read_unlocked (Sample *dst, framepos_t start, framecnt_t cnt) const;
+    framecnt_t write_unlocked (Sample *src, framecnt_t cnt);
+    
+    XMLNode& get_state ();
+    int set_state (const XMLNode&, int version);
+
+    void append_event_unlocked_beats(const Evoral::Event<Evoral::MusicalTime>& ev);
+    void append_event_unlocked_frames(const Evoral::Event<framepos_t>& ev, framepos_t source_start);
+    void load_model(bool lock=true, bool force_reload=false);
+    void destroy_model();
+
+    static void ensure_buffers_for_level (uint32_t);
+
+  protected:
+    friend class SourceFactory;
+
+    MidiPlaylistSource (Session&, const PBD::ID& orig, const std::string& name, boost::shared_ptr<MidiPlaylist>, uint32_t chn,
+			frameoffset_t begin, framecnt_t len, Source::Flag flags);
+    MidiPlaylistSource (Session&, const XMLNode&);
+    
+    
+    void flush_midi();
+
+    framepos_t read_unlocked (Evoral::EventSink<framepos_t>& dst,
+				      framepos_t position,
+				      framepos_t start, framecnt_t cnt,
+				      MidiStateTracker* tracker) const;
+    
+    framepos_t write_unlocked (MidiRingBuffer<framepos_t>& dst,
+					   framepos_t position,
+					   framecnt_t cnt);
+  private:
+    int set_state (const XMLNode&, int version, bool with_descendants);
+    framecnt_t _length;
+};
+        
+} /* namespace */
+
+#endif /* __ardour_midi_playlist_source_h__ */