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    Copyright (C) 2000-2007 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
    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.


#ifndef __ardour_export_h__
#define __ardour_export_h__

#include <map>
#include <vector>
#include <string>

#include <sigc++/signal.h>

#include <sndfile.h>
#include <samplerate.h>

#include <ardour/ardour.h>
#include <ardour/gdither.h>

using std::map;
using std::vector;
using std::string;
using std::pair;

namespace ARDOUR 
      class Port;

      typedef pair<Port *, uint32_t> PortChannelPair;
      typedef map<uint32_t, vector<PortChannelPair> > AudioExportPortMap;

      struct AudioExportSpecification : public SF_INFO, public sigc::trackable {

          ~AudioExportSpecification ();

          void init ();
          void clear ();

          int prepare (nframes_t blocksize, nframes_t frame_rate);

          int process (nframes_t nframes);

          /* set by the user */

          string              path;
          nframes_t      sample_rate;

          int                 src_quality;
          SNDFILE*            out;
          uint32_t       channels;
          AudioExportPortMap  port_map;
          nframes_t      start_frame;
          nframes_t      end_frame;
          GDitherType         dither_type;
          bool                do_freewheel;

          /* used exclusively during export */

          nframes_t      frame_rate;
          GDither             dither;
          float*              dataF;
          float*              dataF2;
          float*              leftoverF;
          nframes_t      leftover_frames;
          nframes_t      max_leftover_frames;
          void*               output_data;
          nframes_t      out_samples_max;
          uint32_t        sample_bytes;
          uint32_t        data_width;

          nframes_t      total_frames;
          SF_INFO             sfinfo;
          SRC_DATA            src_data;
          SRC_STATE*          src_state;
          nframes_t      pos;

          sigc::connection    freewheel_connection;

          /* shared between UI thread and audio thread */

          volatile float progress;  /* audio thread sets this */
          volatile bool  stop;      /* UI sets this */
          volatile bool  running;   /* audio thread sets to false when export is done */

          int   status;

} // namespace ARDOUR

#endif /* __ardour_export_h__ */

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