Event.cpp

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/* This file is part of Evoral.
 * Copyright (C) 2008 David 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
 */

#include <glib.h>
#include "evoral/Event.hpp"

namespace Evoral {

static event_id_t _event_id_counter = 0;

event_id_t
event_id_counter()
{
        return g_atomic_int_get (&_event_id_counter); 
}

void 
init_event_id_counter(event_id_t n) 
{ 
        g_atomic_int_set (&_event_id_counter, n); 
}

event_id_t
next_event_id ()
{
        return g_atomic_int_add (&_event_id_counter, 1);
}

#ifdef EVORAL_EVENT_ALLOC

template<typename Timestamp>
Event<Timestamp>::Event(EventType type, Timestamp time, uint32_t size, uint8_t* buf, bool alloc)
        : _type(type)
        , _original_time(time)
        , _nominal_time(time)
        , _size(size)
        , _buf(buf)
        , _id(-1)
        , _owns_buf(alloc)
{
        if (alloc) {
                _buf = (uint8_t*)malloc(_size);
                if (buf) {
                        memcpy(_buf, buf, _size);
                } else {
                        memset(_buf, 0, _size);
                }
        }
}

template<typename Timestamp>
Event<Timestamp>::Event(EventType      type,
                        Timestamp      time,
                        uint32_t       size,
                        const uint8_t* buf)
        : _type(type)
        , _original_time(time)
        , _nominal_time(time)
        , _size(size)
        , _buf((uint8_t*)malloc(size))
        , _id(-1)
        , _owns_buf(true)
{
        memcpy(_buf, buf, _size);
}

template<typename Timestamp>
Event<Timestamp>::Event(const Event& copy, bool owns_buf)
        : _type(copy._type)
        , _original_time(copy._original_time)
        , _nominal_time(copy._nominal_time)
        , _size(copy._size)
        , _buf(copy._buf)
        , _id(copy.id())
        , _owns_buf(owns_buf)
{
        if (owns_buf) {
                _buf = (uint8_t*)malloc(_size);
                if (copy._buf) {
                        memcpy(_buf, copy._buf, _size);
                } else {
                        memset(_buf, 0, _size);
                }
        }
}

template<typename Timestamp>
Event<Timestamp>::~Event() {
        if (_owns_buf) {
                free(_buf);
        }
}

template<typename Timestamp>
const Event<Timestamp>&
Event<Timestamp>::operator=(const Event& copy)
{
        _id = copy.id(); // XXX is this right? do we want ID copy semantics?
        _type = copy._type;
        _original_time = copy._original_time;
        _nominal_time = copy._nominal_time;
        _owns_buf = copy._owns_buf;
        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;
}

template<typename Timestamp>
void
Event<Timestamp>::set (const uint8_t* buf, uint32_t size, Timestamp t)
{
        if (_owns_buf) {
                if (_size < size) {
                        _buf = (uint8_t*) ::realloc(_buf, size);
                }
                memcpy (_buf, buf, size);
        } else {
                /* XXX this is really dangerous given the
                   const-ness of buf. The API should really
                   intervene here.
                */
                _buf = const_cast<uint8_t*> (buf);
        }

        _original_time = t;
        _nominal_time = t;
        _size = size;
}

template<typename Timestamp>
void
Event<Timestamp>::set_time (Timestamp t)
{
        _nominal_time = t;
}

template<typename Timestamp>
void
Event<Timestamp>::set_original_time (Timestamp t)
{
        _original_time = t;
}
        
#endif // EVORAL_EVENT_ALLOC

template class Event<Evoral::Beats>;
template class Event<double>;
template class Event<int64_t>;

} // namespace Evoral