2 Copyright (C) 2000-2006 Paul Davis
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 #ifndef __ardour_diskstream_h__
21 #define __ardour_diskstream_h__
30 #include <boost/utility.hpp>
32 #include "evoral/types.hpp"
34 #include "ardour/ardour.h"
35 #include "ardour/chan_count.h"
36 #include "ardour/session_object.h"
37 #include "ardour/types.h"
38 #include "ardour/utils.h"
39 #include "ardour/public_diskstream.h"
54 /** Parent class for classes which can stream data to and from disk.
55 * These are used by Tracks to get playback and put recorded data.
57 class Diskstream : public SessionObject, public PublicDiskstream
67 Diskstream (Session &, const std::string& name, Flag f = Recordable);
68 Diskstream (Session &, const XMLNode&);
69 virtual ~Diskstream();
71 virtual bool set_name (const std::string& str);
73 virtual std::string steal_write_source_name () { return std::string(); }
75 boost::shared_ptr<ARDOUR::IO> io() const { return _io; }
76 void set_track (ARDOUR::Track *);
78 /** @return A number between 0 and 1, where 0 indicates that the playback buffer
79 * is dry (ie the disk subsystem could not keep up) and 1 indicates that the
82 virtual float playback_buffer_load() const = 0;
83 virtual float capture_buffer_load() const = 0;
85 void set_flag (Flag f) { _flags = Flag (_flags | f); }
86 void unset_flag (Flag f) { _flags = Flag (_flags & ~f); }
88 AlignStyle alignment_style() const { return _alignment_style; }
89 AlignChoice alignment_choice() const { return _alignment_choice; }
90 void set_align_style (AlignStyle, bool force=false);
91 void set_align_choice (AlignChoice a, bool force=false);
93 framecnt_t roll_delay() const { return _roll_delay; }
94 void set_roll_delay (framecnt_t);
96 bool record_enabled() const { return g_atomic_int_get (&_record_enabled); }
97 virtual void set_record_enabled (bool yn) = 0;
99 bool destructive() const { return _flags & Destructive; }
100 virtual int set_destructive (bool /*yn*/) { return -1; }
101 virtual int set_non_layered (bool /*yn*/) { return -1; }
102 virtual bool can_become_destructive (bool& /*requires_bounce*/) const { return false; }
104 bool hidden() const { return _flags & Hidden; }
105 bool recordable() const { return _flags & Recordable; }
106 bool non_layered() const { return _flags & NonLayered; }
107 bool reversed() const { return _actual_speed < 0.0f; }
108 double speed() const { return _visible_speed; }
110 virtual void punch_in() {}
111 virtual void punch_out() {}
113 void non_realtime_set_speed ();
114 virtual void non_realtime_locate (framepos_t /*location*/) {};
115 virtual void playlist_modified ();
117 boost::shared_ptr<Playlist> playlist () { return _playlist; }
119 virtual int use_playlist (boost::shared_ptr<Playlist>);
120 virtual int use_new_playlist () = 0;
121 virtual int use_copy_playlist () = 0;
123 /** @return Start position of currently-running capture (in session frames) */
124 framepos_t current_capture_start() const { return capture_start_frame; }
125 framepos_t current_capture_end() const { return capture_start_frame + capture_captured; }
126 framepos_t get_capture_start_frame (uint32_t n = 0) const;
127 framecnt_t get_captured_frames (uint32_t n = 0) const;
129 ChanCount n_channels() { return _n_channels; }
131 static framecnt_t disk_io_frames() { return disk_io_chunk_frames; }
132 static void set_disk_io_chunk_frames (framecnt_t n) { disk_io_chunk_frames = n; }
135 virtual XMLNode& get_state(void);
136 virtual int set_state(const XMLNode&, int version);
138 virtual void request_input_monitoring (bool) {}
139 virtual void ensure_input_monitoring (bool) {}
141 framecnt_t capture_offset() const { return _capture_offset; }
142 virtual void set_capture_offset ();
144 bool slaved() const { return _slaved; }
145 void set_slaved(bool yn) { _slaved = yn; }
147 int set_loop (Location *loc);
149 std::list<boost::shared_ptr<Source> >& last_capture_sources () { return _last_capture_sources; }
151 void handle_input_change (IOChange, void *src);
153 void move_processor_automation (boost::weak_ptr<Processor>,
154 std::list<Evoral::RangeMove<framepos_t> > const &);
156 /** For non-butler contexts (allocates temporary working buffers) */
157 virtual int do_refill_with_alloc() = 0;
158 virtual void set_block_size (pframes_t) = 0;
160 bool pending_overwrite () const {
161 return _pending_overwrite;
164 PBD::Signal0<void> RecordEnableChanged;
165 PBD::Signal0<void> SpeedChanged;
166 PBD::Signal0<void> ReverseChanged;
167 /* Emitted when this diskstream is set to use a different playlist */
168 PBD::Signal0<void> PlaylistChanged;
169 PBD::Signal0<void> AlignmentStyleChanged;
170 PBD::Signal1<void,Location *> LoopSet;
172 static PBD::Signal0<void> DiskOverrun;
173 static PBD::Signal0<void> DiskUnderrun;
176 friend class Session;
179 /* the Session is the only point of access for these because they require
180 * that the Session is "inactive" while they are called.
183 virtual void set_pending_overwrite (bool) = 0;
184 virtual int overwrite_existing_buffers () = 0;
185 virtual int internal_playback_seek (framecnt_t distance) = 0;
186 virtual int can_internal_playback_seek (framecnt_t distance) = 0;
187 virtual void reset_write_sources (bool, bool force = false) = 0;
188 virtual void non_realtime_input_change () = 0;
191 friend class Auditioner;
192 virtual int seek (framepos_t which_sample, bool complete_refill = false) = 0;
197 virtual int process (BufferSet&, framepos_t transport_frame, pframes_t nframes, framecnt_t &, bool need_disk_signal) = 0;
198 virtual frameoffset_t calculate_playback_distance (pframes_t nframes) = 0;
199 virtual bool commit (framecnt_t) = 0;
203 enum TransitionType {
208 struct CaptureTransition {
210 framepos_t capture_val; ///< The start or end file frame position
213 /* The two central butler operations */
214 virtual int do_flush (RunContext context, bool force = false) = 0;
215 virtual int do_refill () = 0;
217 /* XXX fix this redundancy ... */
219 virtual void playlist_changed (const PBD::PropertyChange&);
220 virtual void playlist_deleted (boost::weak_ptr<Playlist>);
221 virtual void playlist_ranges_moved (std::list< Evoral::RangeMove<framepos_t> > const &, bool);
223 virtual void transport_stopped_wallclock (struct tm&, time_t, bool abort) = 0;
224 virtual void transport_looped (framepos_t transport_frame) = 0;
231 virtual int use_new_write_source (uint32_t n=0) = 0;
233 virtual int find_and_use_playlist (const std::string&) = 0;
235 virtual void allocate_temporary_buffers () = 0;
237 virtual bool realtime_set_speed (double, bool global_change);
239 std::list<boost::shared_ptr<Source> > _last_capture_sources;
241 virtual int use_pending_capture_data (XMLNode& node) = 0;
243 virtual void check_record_status (framepos_t transport_frame, bool can_record);
244 virtual void prepare_record_status (framepos_t /*capture_start_frame*/) {}
245 virtual void set_align_style_from_io() {}
246 virtual void setup_destructive_playlist () {}
247 virtual void use_destructive_playlist () {}
248 virtual void prepare_to_stop (framepos_t pos);
250 void engage_record_enable ();
251 void disengage_record_enable ();
253 virtual bool prep_record_enable () = 0;
254 virtual bool prep_record_disable () = 0;
256 void calculate_record_range (
257 Evoral::OverlapType ot, framepos_t transport_frame, framecnt_t nframes,
258 framecnt_t& rec_nframes, framecnt_t& rec_offset
261 static framecnt_t disk_io_chunk_frames;
262 std::vector<CaptureInfo*> capture_info;
263 mutable Glib::Threads::Mutex capture_info_lock;
265 uint32_t i_am_the_modifier;
267 boost::shared_ptr<ARDOUR::IO> _io;
269 ChanCount _n_channels;
271 boost::shared_ptr<Playlist> _playlist;
273 mutable gint _record_enabled;
274 double _visible_speed;
275 double _actual_speed;
276 /* items needed for speed change logic */
277 bool _buffer_reallocation_required;
280 /** Start of currently running capture in session frames */
281 framepos_t capture_start_frame;
282 framecnt_t capture_captured;
284 framecnt_t adjust_capture_position;
285 framecnt_t _capture_offset;
286 /** The number of frames by which this diskstream's output should be delayed
287 with respect to the transport frame. This is used for latency compensation.
289 framecnt_t _roll_delay;
290 framepos_t first_recordable_frame;
291 framepos_t last_recordable_frame;
292 int last_possibly_recording;
293 AlignStyle _alignment_style;
294 AlignChoice _alignment_choice;
296 Location* loop_location;
297 framepos_t overwrite_frame;
298 off_t overwrite_offset;
299 bool _pending_overwrite;
300 bool overwrite_queued;
301 IOChange input_change_pending;
302 framecnt_t wrap_buffer_size;
303 framecnt_t speed_buffer_size;
306 double _target_speed;
308 /** The next frame position that we should be reading from in our playlist */
309 framepos_t file_frame;
310 framepos_t playback_sample;
314 Glib::Threads::Mutex state_lock;
316 PBD::ScopedConnectionList playlist_connections;
318 PBD::ScopedConnection ic_connection;
321 XMLNode* deprecated_io_node;
323 void route_going_away ();
326 }; /* namespace ARDOUR */
328 #endif /* __ardour_diskstream_h__ */