From f2b007195cd75b195e38a4cd7757debac73e7792 Mon Sep 17 00:00:00 2001
From: Paul Davis <paul@linuxaudiosystems.com>
Date: Wed, 17 Sep 2008 12:58:33 +0000
Subject: new files from sakari, missed last time

git-svn-id: svn://localhost/ardour2/branches/3.0@3740 d708f5d6-7413-0410-9779-e7cbd77b26cf
---
 libs/ardour/export_timespan.cc | 113 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 113 insertions(+)
 create mode 100644 libs/ardour/export_timespan.cc

(limited to 'libs/ardour/export_timespan.cc')

diff --git a/libs/ardour/export_timespan.cc b/libs/ardour/export_timespan.cc
new file mode 100644
index 0000000000..14273d835f
--- /dev/null
+++ b/libs/ardour/export_timespan.cc
@@ -0,0 +1,113 @@
+/*
+    Copyright (C) 2008 Paul Davis
+    Author: Sakari Bergen
+
+    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.
+
+*/
+
+#include <ardour/export_timespan.h>
+
+#include <ardour/export_channel_configuration.h>
+#include <ardour/export_filename.h>
+#include <ardour/export_file_io.h>
+#include <ardour/export_failed.h>
+
+namespace ARDOUR
+{
+
+ExportTimespan::ExportTimespan (ExportStatus & status, nframes_t frame_rate) :
+  status (status),
+  start_frame (0),
+  end_frame (0),
+  position (0),
+  frame_rate (frame_rate)
+{
+}
+
+ExportTimespan::~ExportTimespan ()
+{
+}
+
+void
+ExportTimespan::register_channel (ExportChannel const & channel)
+{
+	TempFilePtr ptr (new ExportTempFile (1, frame_rate));
+	ChannelFilePair pair (channel, ptr);
+	filemap.insert (pair);
+}
+
+void
+ExportTimespan::rewind ()
+{
+	for (TempFileMap::iterator it = filemap.begin(); it != filemap.end(); ++it) {
+		it->second->reset_read ();
+	}
+}
+
+nframes_t
+ExportTimespan::get_data (float * data, nframes_t frames, ExportChannel const & channel)
+{
+	TempFileMap::iterator it = filemap.find (channel);
+	if (it == filemap.end()) {
+		throw ExportFailed (_("Export failed due to programming error"), _("Trying to get data from ExportTimespan for channel that was never registered!"));
+	}
+	
+	return it->second->read (data, frames);
+}
+
+void
+ExportTimespan::set_range (nframes_t start, nframes_t end)
+{
+	start_frame = start;
+	position = start_frame;
+	end_frame = end;
+}
+
+int
+ExportTimespan::process (nframes_t frames)
+{
+	status.stage = export_ReadTimespan;
+
+	/* update position */
+
+	nframes_t frames_to_read;
+	
+	if (position + frames <= end_frame) {
+		frames_to_read = frames;
+	} else {
+		frames_to_read = end_frame - position;
+		status.stop = true;
+	}
+	
+	position += frames_to_read;
+	status.progress = (float) (position - start_frame) / (end_frame - start_frame);
+
+	/* Read channels from ports and save to tempfiles */
+
+	float * data = new float[frames_to_read];
+	
+	for (TempFileMap::iterator it = filemap.begin(); it != filemap.end(); ++it) {
+		it->first.read_ports (data, frames_to_read);
+		it->second->write (data, frames_to_read);
+	}
+	
+	delete [] data;
+
+	return 0;
+}
+
+
+} // namespace ARDOUR
-- 
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