new files from sakari, missed last time

[ardour.git] / libs / ardour / export_timespan.cc

diff --git a/libs/ardour/export_timespan.cc b/libs/ardour/export_timespan.cc
new file mode 100644 (file)
index 0000000..14273d8
--- /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