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;
40 template<typename T> class MidiRingBuffer;
42 /** Source for MIDI data */
43 class LIBARDOUR_API MidiSource : virtual public Source, public boost::enable_shared_from_this<MidiSource>
46 typedef double TimeType;
48 MidiSource (Session& session, std::string name, Source::Flag flags = Source::Flag(0));
49 MidiSource (Session& session, const XMLNode&);
50 virtual ~MidiSource ();
52 /** Write the data in the given time range to another MidiSource
53 * \param newsrc MidiSource to which data will be written. Should be a
54 * new, empty source. If it already has contents, the results are
55 * undefined. Source must be writable.
56 * \param begin time of earliest event that can be written.
57 * \param end time of latest event that can be written.
58 * \return zero on success, non-zero if the write failed for any reason.
60 int write_to (boost::shared_ptr<MidiSource> newsrc,
61 Evoral::MusicalTime begin = Evoral::MinMusicalTime,
62 Evoral::MusicalTime end = Evoral::MaxMusicalTime);
64 /** Read the data in a given time range from the MIDI source.
65 * All time stamps in parameters are in audio frames (even if the source has tempo time).
66 * \param dst Ring buffer where read events are written.
67 * \param source_start Start position of the SOURCE in this read context.
68 * \param start Start of range to be read.
69 * \param cnt Length of range to be read (in audio frames).
70 * \param tracker an optional pointer to MidiStateTracker object, for note on/off tracking.
71 * \param filtered Parameters whose MIDI messages will not be returned.
73 virtual framecnt_t midi_read (Evoral::EventSink<framepos_t>& dst,
74 framepos_t source_start,
77 MidiStateTracker* tracker,
78 const std::set<Evoral::Parameter>& filtered) const;
80 /** Write data from a MidiRingBuffer to this source.
81 * @param source Source to read from.
82 * @param source_start This source's start position in session frames.
83 * @param cnt The length of time to write.
85 virtual framecnt_t midi_write (MidiRingBuffer<framepos_t>& src,
86 framepos_t source_start,
89 virtual void append_event_unlocked_beats(const Evoral::Event<Evoral::MusicalTime>& ev) = 0;
91 virtual void append_event_unlocked_frames(const Evoral::Event<framepos_t>& ev,
92 framepos_t source_start) = 0;
94 virtual bool empty () const;
95 virtual framecnt_t length (framepos_t pos) const;
96 virtual void update_length (framecnt_t);
98 virtual void mark_streaming_midi_write_started (NoteMode mode);
99 virtual void mark_streaming_write_started ();
100 virtual void mark_streaming_write_completed ();
102 /** Mark write starting with the given time parameters.
104 * This is called by MidiDiskStream::process before writing to the capture
105 * buffer which will be later read by midi_read().
107 * @param position The timeline position the source now starts at.
108 * @param capture_length The current length of the capture, which may not
109 * be zero if record is armed while rolling.
110 * @param loop_length The loop length if looping, otherwise zero.
112 void mark_write_starting_now (framecnt_t position,
113 framecnt_t capture_length,
114 framecnt_t loop_length);
116 /* like ::mark_streaming_write_completed() but with more arguments to
117 * allow control over MIDI-specific behaviour. Expected to be used only
118 * when recording actual MIDI input, rather then when importing files
121 virtual void mark_midi_streaming_write_completed (
122 Evoral::Sequence<Evoral::MusicalTime>::StuckNoteOption stuck_option,
123 Evoral::MusicalTime when = 0);
125 virtual void session_saved();
127 std::string captured_for() const { return _captured_for; }
128 void set_captured_for (std::string str) { _captured_for = str; }
130 static PBD::Signal1<void,MidiSource*> MidiSourceCreated;
132 XMLNode& get_state ();
133 int set_state (const XMLNode&, int version);
135 bool length_mutable() const { return true; }
137 void set_length_beats(double l) { _length_beats = l; }
138 double length_beats() const { return _length_beats; }
140 virtual void load_model(bool lock=true, bool force_reload=false) = 0;
141 virtual void destroy_model() = 0;
143 /** This must be called with the source lock held whenever the
144 * source/model contents have been changed (reset iterators/cache/etc).
148 void set_note_mode(NoteMode mode);
150 boost::shared_ptr<MidiModel> model() { return _model; }
151 void set_model (boost::shared_ptr<MidiModel>);
154 Evoral::ControlList::InterpolationStyle interpolation_of (Evoral::Parameter) const;
155 void set_interpolation_of (Evoral::Parameter, Evoral::ControlList::InterpolationStyle);
156 void copy_interpolation_from (boost::shared_ptr<MidiSource>);
157 void copy_interpolation_from (MidiSource *);
159 AutoState automation_state_of (Evoral::Parameter) const;
160 void set_automation_state_of (Evoral::Parameter, AutoState);
161 void copy_automation_state_from (boost::shared_ptr<MidiSource>);
162 void copy_automation_state_from (MidiSource *);
164 /** Emitted when a different MidiModel is set */
165 PBD::Signal0<void> ModelChanged;
166 /** Emitted when a parameter's interpolation style is changed */
167 PBD::Signal2<void, Evoral::Parameter, Evoral::ControlList::InterpolationStyle> InterpolationChanged;
168 /** Emitted when a parameter's automation state is changed */
169 PBD::Signal2<void, Evoral::Parameter, AutoState> AutomationStateChanged;
172 virtual void flush_midi() = 0;
174 virtual framecnt_t read_unlocked (Evoral::EventSink<framepos_t>& dst,
178 MidiStateTracker* tracker) const = 0;
180 /** Write data to this source from a MidiRingBuffer.
181 * @param source Buffer to read from.
182 * @param position This source's start position in session frames.
183 * @param cnt The duration of this block to write for.
185 virtual framecnt_t write_unlocked (MidiRingBuffer<framepos_t>& source,
189 std::string _captured_for;
191 boost::shared_ptr<MidiModel> _model;
194 mutable Evoral::Sequence<Evoral::MusicalTime>::const_iterator _model_iter;
195 mutable bool _model_iter_valid;
197 mutable double _length_beats;
198 mutable framepos_t _last_read_end;
200 /** The total duration of the current capture. */
201 framepos_t _capture_length;
203 /** Length of transport loop during current capture, or zero. */
204 framepos_t _capture_loop_length;
206 /** Map of interpolation styles to use for Parameters; if they are not in this map,
207 * the correct interpolation style can be obtained from EventTypeMap::interpolation_of ()
209 typedef std::map<Evoral::Parameter, Evoral::ControlList::InterpolationStyle> InterpolationStyleMap;
210 InterpolationStyleMap _interpolation_style;
212 /** Map of automation states to use for Parameters; if they are not in this map,
213 * the correct automation state is Off.
215 typedef std::map<Evoral::Parameter, AutoState> AutomationStateMap;
216 AutomationStateMap _automation_state;
221 #endif /* __ardour_midi_source_h__ */