2 Copyright (C) 2006 Paul Davis
3 Author: David Robillard
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software
17 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 #ifndef __ardour_midi_source_h__
21 #define __ardour_midi_source_h__
25 #include <glibmm/threads.h>
26 #include <boost/enable_shared_from_this.hpp>
27 #include "pbd/stateful.h"
28 #include "pbd/xml++.h"
29 #include "evoral/Sequence.hpp"
30 #include "ardour/ardour.h"
31 #include "ardour/buffer.h"
32 #include "ardour/source.h"
33 #include "ardour/beats_frames_converter.h"
37 class MidiStateTracker;
39 template<typename T> class MidiRingBuffer;
41 /** Source for MIDI data */
42 class MidiSource : virtual public Source, public boost::enable_shared_from_this<MidiSource>
45 typedef double TimeType;
47 MidiSource (Session& session, std::string name, Source::Flag flags = Source::Flag(0));
48 MidiSource (Session& session, const XMLNode&);
49 virtual ~MidiSource ();
51 boost::shared_ptr<MidiSource> clone (const std::string& path,
52 Evoral::MusicalTime begin = Evoral::MinMusicalTime,
53 Evoral::MusicalTime end = Evoral::MaxMusicalTime);
55 /** Read the data in a given time range from the MIDI source.
56 * All time stamps in parameters are in audio frames (even if the source has tempo time).
57 * \param dst Ring buffer where read events are written
58 * \param source_start Start position of the SOURCE in this read context
59 * \param start Start of range to be read
60 * \param cnt Length of range to be read (in audio frames)
61 * \param tracker an optional pointer to MidiStateTracker object, for note on/off tracking
63 virtual framecnt_t midi_read (Evoral::EventSink<framepos_t>& dst,
64 framepos_t source_start,
67 MidiStateTracker* tracker,
68 std::set<Evoral::Parameter> const &) const;
70 /** Write data from a MidiRingBuffer to this source.
71 * @param source Source to read from.
72 * @param source_start This source's start position in session frames.
73 * @param cnt The length of time to write.
75 virtual framecnt_t midi_write (MidiRingBuffer<framepos_t>& src,
76 framepos_t source_start,
79 virtual void append_event_unlocked_beats(const Evoral::Event<Evoral::MusicalTime>& ev) = 0;
81 virtual void append_event_unlocked_frames(const Evoral::Event<framepos_t>& ev,
82 framepos_t source_start) = 0;
84 virtual bool empty () const;
85 virtual framecnt_t length (framepos_t pos) const;
86 virtual void update_length (framecnt_t);
88 virtual void mark_streaming_midi_write_started (NoteMode mode);
89 virtual void mark_streaming_write_started ();
90 virtual void mark_streaming_write_completed ();
92 /** Mark write starting with the given time parameters.
94 * This is called by MidiDiskStream::process before writing to the capture
95 * buffer which will be later read by midi_read().
97 * @param position The timeline position the source now starts at.
98 * @param capture_length The current length of the capture, which may not
99 * be zero if record is armed while rolling.
100 * @param loop_length The loop length if looping, otherwise zero.
102 void mark_write_starting_now (framecnt_t position,
103 framecnt_t capture_length,
104 framecnt_t loop_length);
106 /* like ::mark_streaming_write_completed() but with more arguments to
107 * allow control over MIDI-specific behaviour. Expected to be used only
108 * when recording actual MIDI input, rather then when importing files
111 virtual void mark_midi_streaming_write_completed (
112 Evoral::Sequence<Evoral::MusicalTime>::StuckNoteOption stuck_option,
113 Evoral::MusicalTime when = 0);
115 virtual void session_saved();
117 std::string captured_for() const { return _captured_for; }
118 void set_captured_for (std::string str) { _captured_for = str; }
120 static PBD::Signal1<void,MidiSource*> MidiSourceCreated;
122 XMLNode& get_state ();
123 int set_state (const XMLNode&, int version);
125 bool length_mutable() const { return true; }
127 void set_length_beats(double l) { _length_beats = l; }
128 double length_beats() const { return _length_beats; }
130 virtual void load_model(bool lock=true, bool force_reload=false) = 0;
131 virtual void destroy_model() = 0;
133 /** This must be called with the source lock held whenever the
134 * source/model contents have been changed (reset iterators/cache/etc).
138 void set_note_mode(NoteMode mode);
140 boost::shared_ptr<MidiModel> model() { return _model; }
141 void set_model (boost::shared_ptr<MidiModel>);
144 Evoral::ControlList::InterpolationStyle interpolation_of (Evoral::Parameter) const;
145 void set_interpolation_of (Evoral::Parameter, Evoral::ControlList::InterpolationStyle);
146 void copy_interpolation_from (boost::shared_ptr<MidiSource>);
147 void copy_interpolation_from (MidiSource *);
149 AutoState automation_state_of (Evoral::Parameter) const;
150 void set_automation_state_of (Evoral::Parameter, AutoState);
151 void copy_automation_state_from (boost::shared_ptr<MidiSource>);
152 void copy_automation_state_from (MidiSource *);
154 /** Emitted when a different MidiModel is set */
155 PBD::Signal0<void> ModelChanged;
156 /** Emitted when a parameter's interpolation style is changed */
157 PBD::Signal2<void, Evoral::Parameter, Evoral::ControlList::InterpolationStyle> InterpolationChanged;
158 /** Emitted when a parameter's automation state is changed */
159 PBD::Signal2<void, Evoral::Parameter, AutoState> AutomationStateChanged;
162 virtual void flush_midi() = 0;
164 virtual framecnt_t read_unlocked (Evoral::EventSink<framepos_t>& dst,
168 MidiStateTracker* tracker) const = 0;
170 /** Write data to this source from a MidiRingBuffer.
171 * @param source Buffer to read from.
172 * @param position This source's start position in session frames.
173 * @param cnt The duration of this block to write for.
175 virtual framecnt_t write_unlocked (MidiRingBuffer<framepos_t>& source,
179 std::string _captured_for;
181 boost::shared_ptr<MidiModel> _model;
184 mutable Evoral::Sequence<Evoral::MusicalTime>::const_iterator _model_iter;
185 mutable bool _model_iter_valid;
187 mutable double _length_beats;
188 mutable framepos_t _last_read_end;
190 /** The total duration of the current capture. */
191 framepos_t _capture_length;
193 /** Length of transport loop during current capture, or zero. */
194 framepos_t _capture_loop_length;
196 /** Map of interpolation styles to use for Parameters; if they are not in this map,
197 * the correct interpolation style can be obtained from EventTypeMap::interpolation_of ()
199 typedef std::map<Evoral::Parameter, Evoral::ControlList::InterpolationStyle> InterpolationStyleMap;
200 InterpolationStyleMap _interpolation_style;
202 /** Map of automation states to use for Parameters; if they are not in this map,
203 * the correct automation state is Off.
205 typedef std::map<Evoral::Parameter, AutoState> AutomationStateMap;
206 AutomationStateMap _automation_state;
211 #endif /* __ardour_midi_source_h__ */