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/*
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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