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/*
Copyright (C) 2006 Paul Davis
Written by Dave Robillard, 2006
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_midi_source_h__
#define __ardour_midi_source_h__
#include <string>
#include <time.h>
#include <sigc++/signal.h>
#include <glibmm/thread.h>
#include "pbd/stateful.h"
#include "pbd/xml++.h"
#include "evoral/Sequence.hpp"
#include "ardour/ardour.h"
#include "ardour/buffer.h"
#include "ardour/source.h"
#include "ardour/beats_frames_converter.h"
namespace ARDOUR {
class MidiModel;
template<typename T> class MidiRingBuffer;
/** Source for MIDI data */
class MidiSource : virtual public Source
{
public:
typedef double TimeType;
MidiSource (Session& session, std::string name, Source::Flag flags = Source::Flag(0));
MidiSource (Session& session, const XMLNode&);
virtual ~MidiSource ();
/** Read the data in a given time range from the MIDI source.
* All time stamps in parameters are in audio frames (even if the source has tempo time).
* \param dst Ring buffer where read events are written
* \param source_start Start position of the SOURCE in this read context
* \param start Start of range to be read
* \param cnt Length of range to be read (in audio frames)
* \param stamp_offset Offset to add to event times written to dst
* \param negative_stamp_offset Offset to subtract from event times written to dst
*/
virtual nframes_t midi_read (MidiRingBuffer<nframes_t>& dst,
sframes_t source_start,
sframes_t start, nframes_t cnt,
sframes_t stamp_offset, sframes_t negative_stamp_offset) const;
virtual nframes_t midi_write (MidiRingBuffer<nframes_t>& src,
sframes_t source_start,
nframes_t cnt);
virtual void append_event_unlocked_beats(const Evoral::Event<Evoral::MusicalTime>& ev) = 0;
virtual void append_event_unlocked_frames(const Evoral::Event<nframes_t>& ev,
sframes_t source_start) = 0;
virtual sframes_t length (sframes_t pos) const;
virtual void update_length (sframes_t pos, sframes_t cnt);
virtual void mark_streaming_midi_write_started (NoteMode mode, sframes_t start_time);
virtual void mark_streaming_write_started ();
virtual void mark_streaming_write_completed ();
virtual void session_saved();
std::string captured_for() const { return _captured_for; }
void set_captured_for (std::string str) { _captured_for = str; }
uint32_t read_data_count() const { return _read_data_count; }
uint32_t write_data_count() const { return _write_data_count; }
static sigc::signal<void,MidiSource*> MidiSourceCreated;
// Signal a range of recorded data is available for reading from model()
mutable sigc::signal<void,sframes_t,nframes_t> ViewDataRangeReady;
XMLNode& get_state ();
int set_state (const XMLNode&, int version = 3000);
bool length_mutable() const { return true; }
virtual void load_model(bool lock=true, bool force_reload=false) = 0;
virtual void destroy_model() = 0;
/** This must be called with the source lock held whenever the
* source/model contents have been changed (reset iterators/cache/etc).
*/
void invalidate();
void set_note_mode(NoteMode mode);
boost::shared_ptr<MidiModel> model() { return _model; }
void set_model(boost::shared_ptr<MidiModel> m) { _model = m; }
void drop_model() { _model.reset(); }
protected:
virtual void flush_midi() = 0;
virtual nframes_t read_unlocked (MidiRingBuffer<nframes_t>& dst,
sframes_t position,
sframes_t start, nframes_t cnt,
sframes_t stamp_offset, sframes_t negative_stamp_offset) const = 0;
virtual nframes_t write_unlocked (MidiRingBuffer<nframes_t>& dst,
sframes_t position,
nframes_t cnt) = 0;
std::string _captured_for;
mutable uint32_t _read_data_count; ///< modified in read()
mutable uint32_t _write_data_count; ///< modified in write()
boost::shared_ptr<MidiModel> _model;
bool _writing;
mutable Evoral::Sequence<Evoral::MusicalTime>::const_iterator _model_iter;
mutable double _length_beats;
mutable sframes_t _last_read_end;
sframes_t _last_write_end;
private:
bool file_changed (std::string path);
};
}
#endif /* __ardour_midi_source_h__ */
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