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Copyright (C) 2000-2006 Paul Davis
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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#ifndef __ardour_diskstream_h__
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#define __ardour_diskstream_h__
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#include <boost/utility.hpp>
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#include "evoral/types.hpp"
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#include "ardour/ardour.h"
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#include "ardour/chan_count.h"
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#include "ardour/session_object.h"
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#include "ardour/types.h"
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#include "ardour/utils.h"
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#include "ardour/public_diskstream.h"
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/** Parent class for classes which can stream data to and from disk.
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* These are used by Tracks to get playback and put recorded data.
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class Diskstream : public SessionObject, public PublicDiskstream
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Diskstream (Session &, const std::string& name, Flag f = Recordable);
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Diskstream (Session &, const XMLNode&);
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virtual ~Diskstream();
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virtual bool set_name (const std::string& str);
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boost::shared_ptr<ARDOUR::IO> io() const { return _io; }
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void set_track (ARDOUR::Track *);
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/** @return A number between 0 and 1, where 0 indicates that the playback buffer
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* is dry (ie the disk subsystem could not keep up) and 1 indicates that the
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virtual float playback_buffer_load() const = 0;
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virtual float capture_buffer_load() const = 0;
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void set_flag (Flag f) { _flags = Flag (_flags | f); }
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void unset_flag (Flag f) { _flags = Flag (_flags & ~f); }
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AlignStyle alignment_style() const { return _alignment_style; }
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AlignChoice alignment_choice() const { return _alignment_choice; }
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void set_align_style (AlignStyle, bool force=false);
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void set_align_choice (AlignChoice a, bool force=false);
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framecnt_t roll_delay() const { return _roll_delay; }
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void set_roll_delay (framecnt_t);
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bool record_enabled() const { return g_atomic_int_get (&_record_enabled); }
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virtual void set_record_enabled (bool yn) = 0;
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bool destructive() const { return _flags & Destructive; }
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virtual int set_destructive (bool /*yn*/) { return -1; }
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virtual int set_non_layered (bool /*yn*/) { return -1; }
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virtual bool can_become_destructive (bool& /*requires_bounce*/) const { return false; }
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bool hidden() const { return _flags & Hidden; }
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bool recordable() const { return _flags & Recordable; }
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bool non_layered() const { return _flags & NonLayered; }
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bool reversed() const { return _actual_speed < 0.0f; }
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double speed() const { return _visible_speed; }
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virtual void punch_in() {}
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virtual void punch_out() {}
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void non_realtime_set_speed ();
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virtual void non_realtime_locate (framepos_t /*location*/) {};
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virtual void playlist_modified ();
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boost::shared_ptr<Playlist> playlist () { return _playlist; }
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virtual int use_playlist (boost::shared_ptr<Playlist>);
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virtual int use_new_playlist () = 0;
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virtual int use_copy_playlist () = 0;
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/** @return Start position of currently-running capture (in session frames) */
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framepos_t current_capture_start() const { return capture_start_frame; }
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framepos_t current_capture_end() const { return capture_start_frame + capture_captured; }
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framepos_t get_capture_start_frame (uint32_t n = 0) const;
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framecnt_t get_captured_frames (uint32_t n = 0) const;
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ChanCount n_channels() { return _n_channels; }
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static framecnt_t disk_io_frames() { return disk_io_chunk_frames; }
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static void set_disk_io_chunk_frames (framecnt_t n) { disk_io_chunk_frames = n; }
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virtual XMLNode& get_state(void);
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virtual int set_state(const XMLNode&, int version);
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virtual void request_jack_monitors_input (bool) {}
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virtual void ensure_jack_monitors_input (bool) {}
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framecnt_t capture_offset() const { return _capture_offset; }
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virtual void set_capture_offset ();
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bool slaved() const { return _slaved; }
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void set_slaved(bool yn) { _slaved = yn; }
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int set_loop (Location *loc);
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std::list<boost::shared_ptr<Source> >& last_capture_sources () { return _last_capture_sources; }
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void handle_input_change (IOChange, void *src);
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void move_processor_automation (boost::weak_ptr<Processor>,
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std::list<Evoral::RangeMove<framepos_t> > const &);
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/** For non-butler contexts (allocates temporary working buffers) */
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virtual int do_refill_with_alloc() = 0;
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virtual void set_block_size (pframes_t) = 0;
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bool pending_overwrite () const {
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return _pending_overwrite;
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PBD::Signal0<void> RecordEnableChanged;
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PBD::Signal0<void> SpeedChanged;
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PBD::Signal0<void> ReverseChanged;
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/* Emitted when this diskstream is set to use a different playlist */
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PBD::Signal0<void> PlaylistChanged;
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PBD::Signal0<void> AlignmentStyleChanged;
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PBD::Signal1<void,Location *> LoopSet;
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static PBD::Signal0<void> DiskOverrun;
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static PBD::Signal0<void> DiskUnderrun;
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friend class Session;
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/* the Session is the only point of access for these because they require
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* that the Session is "inactive" while they are called.
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virtual void set_pending_overwrite (bool) = 0;
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virtual int overwrite_existing_buffers () = 0;
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virtual int internal_playback_seek (framecnt_t distance) = 0;
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virtual int can_internal_playback_seek (framecnt_t distance) = 0;
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virtual void reset_write_sources (bool, bool force = false) = 0;
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virtual void non_realtime_input_change () = 0;
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friend class Auditioner;
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virtual int seek (framepos_t which_sample, bool complete_refill = false) = 0;
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virtual int process (BufferSet&, framepos_t transport_frame, pframes_t nframes, framecnt_t &, bool need_disk_signal) = 0;
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virtual frameoffset_t calculate_playback_distance (pframes_t nframes) = 0;
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virtual bool commit (framecnt_t) = 0;
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enum TransitionType {
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struct CaptureTransition {
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framepos_t capture_val; ///< The start or end file frame position
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/* The two central butler operations */
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virtual int do_flush (RunContext context, bool force = false) = 0;
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virtual int do_refill () = 0;
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/* XXX fix this redundancy ... */
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virtual void playlist_changed (const PBD::PropertyChange&);
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virtual void playlist_deleted (boost::weak_ptr<Playlist>);
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virtual void playlist_ranges_moved (std::list< Evoral::RangeMove<framepos_t> > const &, bool);
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virtual void transport_stopped_wallclock (struct tm&, time_t, bool abort) = 0;
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virtual void transport_looped (framepos_t transport_frame) = 0;
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virtual int use_new_write_source (uint32_t n=0) = 0;
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virtual int find_and_use_playlist (const std::string&) = 0;
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virtual void allocate_temporary_buffers () = 0;
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virtual bool realtime_set_speed (double, bool global_change);
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std::list<boost::shared_ptr<Source> > _last_capture_sources;
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virtual int use_pending_capture_data (XMLNode& node) = 0;
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virtual void check_record_status (framepos_t transport_frame, bool can_record);
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virtual void prepare_record_status (framepos_t /*capture_start_frame*/) {}
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virtual void set_align_style_from_io() {}
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virtual void setup_destructive_playlist () {}
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virtual void use_destructive_playlist () {}
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virtual void prepare_to_stop (framepos_t pos);
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void engage_record_enable ();
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void disengage_record_enable ();
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virtual bool prep_record_enable () = 0;
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virtual bool prep_record_disable () = 0;
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void calculate_record_range (
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Evoral::OverlapType ot, framepos_t transport_frame, framecnt_t nframes,
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framecnt_t& rec_nframes, framecnt_t& rec_offset
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static framecnt_t disk_io_chunk_frames;
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std::vector<CaptureInfo*> capture_info;
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mutable Glib::Threads::Mutex capture_info_lock;
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uint32_t i_am_the_modifier;
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boost::shared_ptr<ARDOUR::IO> _io;
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ChanCount _n_channels;
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boost::shared_ptr<Playlist> _playlist;
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mutable gint _record_enabled;
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double _visible_speed;
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double _actual_speed;
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/* items needed for speed change logic */
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bool _buffer_reallocation_required;
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/** Start of currently running capture in session frames */
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framepos_t capture_start_frame;
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framecnt_t capture_captured;
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framecnt_t adjust_capture_position;
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framecnt_t _capture_offset;
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/** The number of frames by which this diskstream's output should be delayed
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with respect to the transport frame. This is used for latency compensation.
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framecnt_t _roll_delay;
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framepos_t first_recordable_frame;
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framepos_t last_recordable_frame;
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int last_possibly_recording;
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AlignStyle _alignment_style;
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AlignChoice _alignment_choice;
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Location* loop_location;
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framepos_t overwrite_frame;
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off_t overwrite_offset;
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bool _pending_overwrite;
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bool overwrite_queued;
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IOChange input_change_pending;
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framecnt_t wrap_buffer_size;
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framecnt_t speed_buffer_size;
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double _target_speed;
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/** The next frame position that we should be reading from in our playlist */
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framepos_t file_frame;
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framepos_t playback_sample;
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Glib::Threads::Mutex state_lock;
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PBD::ScopedConnectionList playlist_connections;
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PBD::ScopedConnection ic_connection;
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XMLNode* deprecated_io_node;
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void route_going_away ();
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}; /* namespace ARDOUR */
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#endif /* __ardour_diskstream_h__ */