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/*
* Copyright (C) 2007-2016 David Robillard <d@drobilla.net>
* Copyright (C) 2007-2018 Paul Davis <paul@linuxaudiosystems.com>
* Copyright (C) 2009-2010 Carl Hetherington <carl@carlh.net>
* Copyright (C) 2009 Hans Baier <hansfbaier@googlemail.com>
* Copyright (C) 2014-2016 Robin Gareus <robin@gareus.org>
*
* 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.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifndef __ardour_rt_midi_buffer_h__
#define __ardour_rt_midi_buffer_h__
#include <map>
#include <glibmm/threads.h>
#include "evoral/Event.h"
#include "evoral/EventSink.h"
#include "ardour/types.h"
namespace ARDOUR {
class MidiBuffer;
class MidiStateTracker;
/** */
class LIBARDOUR_API RTMidiBuffer : public Evoral::EventSink<samplepos_t>
{
public:
typedef samplepos_t TimeType;
RTMidiBuffer ();
~RTMidiBuffer();
void clear();
void resize(size_t);
size_t size() const { return _size; }
uint32_t write (TimeType time, Evoral::EventType type, uint32_t size, const uint8_t* buf);
uint32_t read (MidiBuffer& dst, samplepos_t start, samplepos_t end, MidiStateTracker& tracker, samplecnt_t offset = 0);
void dump (uint32_t);
void reverse ();
bool reversed() const;
struct Item {
samplepos_t timestamp;
union {
uint8_t bytes[4];
uint32_t offset;
};
};
private:
friend struct WriteProtectRender;
struct Blob {
uint32_t size;
uint8_t data[0];
};
/* The main store. Holds Items (timestamp+up to 3 bytes of data OR
* offset into secondary storage below)
*/
size_t _size;
size_t _capacity;
Item* _data;
bool _reversed;
/* secondary blob storage. Holds Blobs (arbitrary size + data) */
uint32_t alloc_blob (uint32_t size);
uint32_t store_blob (uint32_t size, uint8_t const * data);
uint32_t _pool_size;
uint32_t _pool_capacity;
uint8_t* _pool;
Glib::Threads::RWLock _lock;
public:
class WriteProtectRender {
public:
WriteProtectRender (RTMidiBuffer& rtm) : lm (rtm._lock, Glib::Threads::NOT_LOCK) {}
void acquire () { lm.acquire(); }
private:
Glib::Threads::RWLock::WriterLock lm;
};
};
} // namespace ARDOUR
#endif // __ardour_rt_midi_buffer_h__
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