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track.h

/*
    Copyright (C) 2006 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.
*/

#ifndef __ardour_track_h__
#define __ardour_track_h__

#include <boost/shared_ptr.hpp>

#include <ardour/route.h>

namespace ARDOUR {

class Session;
class Diskstream;
class Playlist;
class RouteGroup;

class Track : public Route
{
  public:
      Track (Session&, string name, Route::Flag f = Route::Flag (0), TrackMode m = Normal, DataType default_type = DataType::AUDIO);

      virtual ~Track ();
      
      int set_name (string str, void *src);

      TrackMode mode () const { return _mode; }
      virtual int set_mode (TrackMode m) { return false; }
      virtual bool can_use_mode (TrackMode m, bool& bounce_required) { return false; }
      sigc::signal<void> TrackModeChanged;

      virtual int roll (nframes_t nframes, nframes_t start_frame, nframes_t end_frame, 
                    int declick, bool can_record, bool rec_monitors_input) = 0;
      
      virtual int no_roll (nframes_t nframes, nframes_t start_frame, nframes_t end_frame, 
                       bool state_changing, bool can_record, bool rec_monitors_input) = 0;
      
      virtual int silent_roll (nframes_t nframes, nframes_t start_frame, nframes_t end_frame, 
                         bool can_record, bool rec_monitors_input) = 0;

      void toggle_monitor_input ();

      virtual bool can_record();

      boost::shared_ptr<Diskstream> diskstream() const { return _diskstream; }

      virtual int use_diskstream (string name) = 0;
      virtual int use_diskstream (const PBD::ID& id) = 0;

      nframes_t update_total_latency();
      void           set_latency_delay (nframes_t);

      enum FreezeState {
            NoFreeze,
            Frozen,
            UnFrozen
      };

      FreezeState freeze_state() const;
 
      virtual void freeze (InterThreadInfo&) = 0;
      virtual void unfreeze () = 0;

      virtual boost::shared_ptr<Region> bounce (InterThreadInfo&) = 0;
      virtual boost::shared_ptr<Region> bounce_range (nframes_t start, nframes_t end, InterThreadInfo&, bool enable_processing = true) = 0;

      XMLNode&    get_state();
      XMLNode&    get_template();
      virtual int set_state(const XMLNode& node) = 0;

      static void zero_diskstream_id_in_xml (XMLNode&);

      PBD::Controllable& rec_enable_control() { return _rec_enable_control; }

      bool record_enabled() const;
      void set_record_enable (bool yn, void *src);
      
      void set_meter_point (MeterPoint, void* src);
      
      sigc::signal<void> DiskstreamChanged;
      sigc::signal<void> FreezeChange;

  protected:
      Track (Session& sess, const XMLNode& node, DataType default_type = DataType::AUDIO);

      virtual XMLNode& state (bool full) = 0;

      virtual void passthru_silence (nframes_t start_frame, nframes_t end_frame, 
                               nframes_t nframes, int declick, bool meter) = 0;

      virtual uint32_t n_process_buffers () = 0;
      
      boost::shared_ptr<Diskstream> _diskstream;
      MeterPoint  _saved_meter_point;
      TrackMode   _mode;

      //private: (FIXME)
      struct FreezeRecordInsertInfo {
          FreezeRecordInsertInfo(XMLNode& st, boost::shared_ptr<Insert> ins) 
                : state (st), insert (ins) {}

          XMLNode                   state;
          boost::shared_ptr<Insert> insert;
          PBD::ID                   id;
          UndoAction                memento;
      };

      struct FreezeRecord {
          FreezeRecord()
            : have_mementos(false)
          {}

          ~FreezeRecord();

          boost::shared_ptr<Playlist>     playlist;
          vector<FreezeRecordInsertInfo*> insert_info;
          bool                            have_mementos;
          FreezeState                     state;
          gain_t                          gain;
          AutoState                       gain_automation_state;
          AutoState                       pan_automation_state;
      };

      struct RecEnableControllable : public PBD::Controllable {
          RecEnableControllable (Track&);
          
          void set_value (float);
          float get_value (void) const;

          Track& track;
      };

      //virtual void diskstream_record_enable_changed (void *src) = 0;
      //virtual void diskstream_input_channel_changed (void *src) = 0;

      //virtual void input_change_handler (void *src) = 0;

      virtual void set_state_part_two () = 0;

      FreezeRecord          _freeze_record;
      XMLNode*              pending_state;
      sigc::connection      recenable_connection;
      sigc::connection      ic_connection;
      RecEnableControllable _rec_enable_control;
      bool                  _destructive;
};

}; /* namespace ARDOUR*/

#endif /* __ardour_track_h__ */

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