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/*
Copyright (C) 2007 Paul Davis
Author: Dave Robillard
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 __libmidipp_midi_event_h__
#define __libmidipp_midi_event_h__
#include <stdint.h>
#include <cstdlib>
#include <cstring>
#include <assert.h>
#include <midi++/types.h>
#include <midi++/events.h>
/** If this is not defined, all methods of MidiEvent are RT safe
* but MidiEvent will never deep copy and (depending on the scenario)
* may not be usable in STL containers, signals, etc.
*/
#define MIDI_EVENT_ALLOW_ALLOC 1
namespace MIDI {
/** Identical to jack_midi_event_t, but with double timestamp
*
* time is either a frame time (from/to Jack) or a beat time (internal
* tempo time, used in MidiModel) depending on context.
*/
struct Event {
#ifdef MIDI_EVENT_ALLOW_ALLOC
Event(double t=0, uint32_t s=0, uint8_t* b=NULL, bool owns_buffer=false)
: _time(t)
, _size(s)
, _buffer(b)
, _owns_buffer(owns_buffer)
{
if (owns_buffer) {
_buffer = (uint8_t*)malloc(_size);
if (b)
memcpy(_buffer, b, _size);
else
memset(_buffer, 0, _size);
}
}
/** Copy \a copy.
*
* If \a owns_buffer is true, the buffer will be copied and this method
* is NOT REALTIME SAFE. Otherwise both events share a buffer and
* memory management semantics are the caller's problem.
*/
Event(const Event& copy, bool owns_buffer)
: _time(copy._time)
, _size(copy._size)
, _buffer(copy._buffer)
, _owns_buffer(owns_buffer)
{
if (owns_buffer) {
_buffer = (uint8_t*)malloc(_size);
if (copy._buffer)
memcpy(_buffer, copy._buffer, _size);
else
memset(_buffer, 0, _size);
}
}
~Event() {
if (_owns_buffer)
free(_buffer);
}
inline const Event& operator=(const Event& copy) {
_time = copy._time;
if (_owns_buffer) {
if (copy._buffer) {
if (!_buffer || _size < copy._size)
_buffer = (uint8_t*)::realloc(_buffer, copy._size);
memcpy(_buffer, copy._buffer, copy._size);
} else {
free(_buffer);
_buffer = NULL;
}
} else {
_buffer = copy._buffer;
}
_size = copy._size;
return *this;
}
inline void set (uint8_t* msg, size_t msglen, timestamp_t t) {
if (_owns_buffer) {
if (_size < msglen) {
free (_buffer);
_buffer = (uint8_t*) malloc (msglen);
}
} else {
_buffer = (uint8_t*) malloc (msglen);
_owns_buffer = true;
}
memcpy (_buffer, msg, msglen);
_time = t;
}
inline bool operator==(const Event& other) const {
if (_time != other._time)
return false;
if (_size != other._size)
return false;
if (_buffer == other._buffer)
return true;
for (size_t i=0; i < _size; ++i)
if (_buffer[i] != other._buffer[i])
return false;
return true;
}
inline bool operator!=(const Event& other) const { return ! operator==(other); }
inline bool owns_buffer() const { return _owns_buffer; }
inline void set_buffer(uint8_t* buf, bool own) {
if (_owns_buffer) {
free(_buffer);
_buffer = NULL;
}
_buffer = buf;
_owns_buffer = own;
}
inline void realloc(size_t size) {
assert(_owns_buffer);
_buffer = (uint8_t*) ::realloc(_buffer, size);
}
#else
inline void set_buffer(uint8_t* buf) { _buffer = buf; }
#endif // MIDI_EVENT_ALLOW_ALLOC
inline double time() const { return _time; }
inline double& time() { return _time; }
inline uint32_t size() const { return _size; }
inline uint32_t& size() { return _size; }
inline uint8_t type() const { return (_buffer[0] & 0xF0); }
inline uint8_t channel() const { return (_buffer[0] & 0x0F); }
inline bool is_note_on() const { return (type() == MIDI_CMD_NOTE_ON); }
inline bool is_note_off() const { return (type() == MIDI_CMD_NOTE_OFF); }
inline bool is_cc() const { return (type() == MIDI_CMD_CONTROL); }
inline bool is_note() const { return (is_note_on() || is_note_off()); }
inline uint8_t note() const { return (_buffer[1]); }
inline uint8_t velocity() const { return (_buffer[2]); }
inline uint8_t cc_number() const { return (_buffer[1]); }
inline uint8_t cc_value() const { return (_buffer[2]); }
inline const uint8_t* buffer() const { return _buffer; }
inline uint8_t*& buffer() { return _buffer; }
private:
double _time; /**< Sample index (or beat time) at which event is valid */
uint32_t _size; /**< Number of uint8_ts of data in \a buffer */
uint8_t* _buffer; /**< Raw MIDI data */
#ifdef MIDI_EVENT_ALLOW_ALLOC
bool _owns_buffer; /**< Whether buffer is locally allocated */
#endif
};
}
#endif /* __libmidipp_midi_event_h__ */
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