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/* This file is part of Evoral.
* Copyright (C) 2008 Dave Robillard <http://drobilla.net>
* Copyright (C) 2000-2008 Paul Davis
*
* Evoral 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.
*
* Evoral 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 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 St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef EVORAL_EVENT_HPP
#define EVORAL_EVENT_HPP
#include <stdint.h>
#include <cstdlib>
#include <cstring>
#include <sstream>
#include <assert.h>
#include "evoral/types.hpp"
/** 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 EVORAL_EVENT_ALLOC 1
namespace Evoral {
/** An event (much like a type generic jack_midi_event_t)
*
* Template parameter Time is the type of the time stamp used for this event.
*/
template<typename Time>
struct Event {
#ifdef EVORAL_EVENT_ALLOC
Event(EventType type=0, Time time=0, uint32_t size=0, uint8_t* buf=NULL, bool alloc=false);
/** Copy \a copy.
*
* If \a alloc 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 alloc);
~Event();
inline const Event& operator=(const Event& copy) {
_type = copy._type;
_original_time = copy._original_time;
_nominal_time = copy._nominal_time;
if (_owns_buf) {
if (copy._buf) {
if (copy._size > _size) {
_buf = (uint8_t*)::realloc(_buf, copy._size);
}
memcpy(_buf, copy._buf, copy._size);
} else {
free(_buf);
_buf = NULL;
}
} else {
_buf = copy._buf;
}
_size = copy._size;
return *this;
}
inline void shallow_copy(const Event& copy) {
if (_owns_buf) {
free(_buf);
_buf = false;
_owns_buf = false;
}
_type = copy._type;
_original_time = copy._nominal_time;
_nominal_time = copy._nominal_time;
_size = copy._size;
_buf = copy._buf;
}
inline void set(uint8_t* buf, uint32_t size, Time t) {
if (_owns_buf) {
if (_size < size) {
_buf = (uint8_t*) ::realloc(_buf, size);
}
memcpy (_buf, buf, size);
} else {
_buf = buf;
}
_original_time = t;
_nominal_time = t;
_size = size;
}
inline bool operator==(const Event& other) const {
if (_type != other._type)
return false;
if (_nominal_time != other._nominal_time)
return false;
if (_original_time != other._original_time)
return false;
if (_size != other._size)
return false;
if (_buf == other._buf)
return true;
for (uint32_t i=0; i < _size; ++i)
if (_buf[i] != other._buf[i])
return false;
return true;
}
inline bool operator!=(const Event& other) const { return ! operator==(other); }
inline bool owns_buffer() const { return _owns_buf; }
inline void set_buffer(uint32_t size, uint8_t* buf, bool own) {
if (_owns_buf) {
free(_buf);
_buf = NULL;
}
_size = size;
_buf = buf;
_owns_buf = own;
}
inline void realloc(uint32_t size) {
if (_owns_buf) {
if (size > _size)
_buf = (uint8_t*) ::realloc(_buf, size);
} else {
_buf = (uint8_t*) ::malloc(size);
_owns_buf = true;
}
_size = size;
}
inline void clear() {
_type = 0;
_original_time = 0;
_nominal_time = 0;
_size = 0;
_buf = NULL;
}
#else
inline void set_buffer(uint8_t* buf) { _buf = buf; }
#endif // EVORAL_EVENT_ALLOC
inline EventType event_type() const { return _type; }
inline void set_event_type(EventType t) { _type = t; }
inline Time time() const { return _nominal_time; }
inline Time& time() { return _nominal_time; }
inline Time original_time() const { return _original_time; }
inline Time& original_time() { return _original_time; }
inline uint32_t size() const { return _size; }
inline uint32_t& size() { return _size; }
inline const uint8_t* buffer() const { return _buf; }
inline uint8_t*& buffer() { return _buf; }
protected:
EventType _type; /**< Type of event (application relative, NOT MIDI 'type') */
Time _original_time; /**< Sample index (or beat time) at which event is valid */
Time _nominal_time; /**< quantized version of _time, used in preference */
uint32_t _size; /**< Number of uint8_ts of data in \a buffer */
uint8_t* _buf; /**< Raw MIDI data */
#ifdef EVORAL_EVENT_ALLOC
bool _owns_buf; /**< Whether buffer is locally allocated */
#endif
};
} // namespace Evoral
template<typename Time>
std::ostream& operator<<(std::ostream& o, const Evoral::Event<Time>& ev) {
o << "Event type = " << ev.event_type() << " @ " << ev.time();
o << std::hex;
for (uint32_t n = 0; n < ev.size(); ++n) {
o << ' ' << (int) ev.buffer()[n];
}
o << std::dec;
return o;
}
#endif // EVORAL_EVENT_HPP
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