refactor playlist sources to allow for MIDI and upcoming work on save/restore

git-svn-id: svn://localhost/ardour2/branches/3.0@9521 d708f5d6-7413-0410-9779-e7cbd77b26cf

1 files changed, 132 insertions, 0 deletions

diff --git a/libs/ardour/playlist_source.cc b/libs/ardour/playlist_source.cc
new file mode 100644
index 0000000000..7ac175959c
--- /dev/null
+++ b/libs/ardour/playlist_source.cc
@@ -0,0 +1,132 @@
+/*
+    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.
+*/
+
+#ifdef WAF_BUILD
+#include "libardour-config.h"
+#endif
+
+#include <vector>
+#include <cstdio>
+
+#include <glibmm/fileutils.h>
+#include <glibmm/miscutils.h>
+
+#include "pbd/error.h"
+#include "pbd/convert.h"
+#include "pbd/enumwriter.h"
+
+#include "ardour/playlist.h"
+#include "ardour/playlist_source.h"
+#include "ardour/session.h"
+#include "ardour/session_playlists.h"
+#include "ardour/source_factory.h"
+
+#include "i18n.h"
+
+using namespace std;
+using namespace ARDOUR;
+using namespace PBD;
+
+PlaylistSource::PlaylistSource (Session& s, const std::string& name, boost::shared_ptr<Playlist> p, DataType type,
+				frameoffset_t begin, framecnt_t len, Source::Flag flags)
+	: Source (s, type, name)
+	, _playlist (p)
+{
+	/* PlaylistSources are never writable, renameable, removable or destructive */
+	_flags = Flag (_flags & ~(Writable|CanRename|Removable|RemovableIfEmpty|RemoveAtDestroy|Destructive));
+
+	_playlist = p;
+	_playlist_offset = begin;
+	_playlist_length = len;
+
+	_level = _playlist->max_source_level () + 1;
+}
+
+PlaylistSource::PlaylistSource (Session& s, const XMLNode& node)
+	: Source (s, DataType::AUDIO, "toBeRenamed")
+{
+	/* PlaylistSources are never writable, renameable, removable or destructive */
+	_flags = Flag (_flags & ~(Writable|CanRename|Removable|RemovableIfEmpty|RemoveAtDestroy|Destructive));
+	
+
+	if (set_state (node, Stateful::loading_state_version)) {
+		throw failed_constructor ();
+	}
+}
+
+PlaylistSource::~PlaylistSource ()
+{
+}
+
+void
+PlaylistSource::add_state (XMLNode& node)
+{
+	char buf[64];
+
+	_playlist->id().print (buf, sizeof (buf));
+	node.add_property ("playlist", buf);
+	snprintf (buf, sizeof (buf), "%" PRIi64, _playlist_offset);
+	node.add_property ("offset", buf);
+	snprintf (buf, sizeof (buf), "%" PRIu64, _playlist_length);
+	node.add_property ("length", buf);
+}
+
+int
+PlaylistSource::set_state (const XMLNode& node, int version) 
+{
+	/* get playlist ID */
+
+	const XMLProperty *prop = node.property (X_("playlist"));
+
+	if (!prop) {
+		throw failed_constructor ();
+	}
+
+	PBD::ID id (prop->value());
+
+	/* get playlist */
+
+	boost::shared_ptr<Playlist> p = _session.playlists->by_id (id);
+
+	if (!_playlist) {
+		throw failed_constructor ();
+	}
+
+	/* other properties */
+
+	if ((prop = node.property (X_("name"))) == 0) {
+		throw failed_constructor ();
+	}
+	
+	set_name (prop->value());
+
+	if ((prop = node.property (X_("offset"))) == 0) {
+		throw failed_constructor ();
+	}
+	sscanf (prop->value().c_str(), "%" PRIi64, &_playlist_offset);
+
+	if ((prop = node.property (X_("length"))) == 0) {
+		throw failed_constructor ();
+	}
+
+	sscanf (prop->value().c_str(), "%" PRIu64, &_playlist_length);
+
+	_level = _playlist->max_source_level () + 1;
+
+	return 0;
+}