From ba4db8f6cb30c3bf373a1261da0f9e49a598ccbc Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Andr=C3=A9=20Nusser?= <andre.nusser@googlemail.com>
Date: Thu, 26 Nov 2015 17:25:13 +0100
Subject: [PATCH] Add function to duplicate until a certain frame.

This excludes the 'end' frame.
---
 libs/ardour/ardour/playlist.h |  1 +
 libs/ardour/playlist.cc       | 33 +++++++++++++++++++++++++++++++++
 2 files changed, 34 insertions(+)

diff --git a/libs/ardour/ardour/playlist.h b/libs/ardour/ardour/playlist.h
index de5a5dcb05..4ebec8d424 100644
--- a/libs/ardour/ardour/playlist.h
+++ b/libs/ardour/ardour/playlist.h
@@ -141,6 +141,7 @@ public:
 	void partition (framepos_t start, framepos_t end, bool cut = false);
 	void duplicate (boost::shared_ptr<Region>, framepos_t position, float times);
 	void duplicate (boost::shared_ptr<Region>, framepos_t position, framecnt_t gap, float times);
+	void duplicate_until (boost::shared_ptr<Region>, framepos_t position, framecnt_t gap, framepos_t end);
 	void nudge_after (framepos_t start, framecnt_t distance, bool forwards);
 	boost::shared_ptr<Region> combine (const RegionList&);
 	void uncombine (boost::shared_ptr<Region>);
diff --git a/libs/ardour/playlist.cc b/libs/ardour/playlist.cc
index 842ff8f394..a4860eba99 100644
--- a/libs/ardour/playlist.cc
+++ b/libs/ardour/playlist.cc
@@ -1283,6 +1283,39 @@ Playlist::flush_notifications (bool from_undo)
 	 }
  }
 
+/** @param gap from the beginning of the region to the next beginning */
+/** @param end the first frame that does _not_ contain a duplicated frame */
+void
+Playlist::duplicate_until (boost::shared_ptr<Region> region, framepos_t position, framecnt_t gap, framepos_t end)
+{
+	 RegionWriteLock rl (this);
+
+	 while (position + region->length() - 1 < end) {
+		 boost::shared_ptr<Region> copy = RegionFactory::create (region, true);
+		 add_region_internal (copy, position);
+		 set_layer (copy, DBL_MAX);
+		 position += gap;
+	 }
+
+	 if (position < end) {
+		 framecnt_t length = min (region->length(), end - position);
+		 string name;
+		 RegionFactory::region_name (name, region->name(), false);
+
+		 {
+			 PropertyList plist;
+
+			 plist.add (Properties::start, region->start());
+			 plist.add (Properties::length, length);
+			 plist.add (Properties::name, name);
+
+			 boost::shared_ptr<Region> sub = RegionFactory::create (region, plist);
+			 add_region_internal (sub, position);
+			 set_layer (sub, DBL_MAX);
+		 }
+	 }
+}
+
  void
  Playlist::shift (framepos_t at, frameoffset_t distance, bool move_intersected, bool ignore_music_glue)
  {