/* This file is part of Ingen.
 * Copyright (C) 2007 Dave Robillard <http://drobilla.net>
 * 
 * Ingen 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.
 * 
 * Ingen 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 <iostream>
#include "MidiBuffer.hpp"

using namespace std;

namespace Ingen {

MidiBuffer::MidiBuffer(size_t capacity)
	: Buffer(DataType(DataType::MIDI), capacity)
	, _buf(lv2midi_new((uint32_t)capacity))
	, _joined_buf(NULL)
{
	_local_state.midi = _buf;
	_state = &_local_state;
	assert(_local_state.midi);
	reset(0);
	clear();
	assert(_local_state.midi == _buf);

	//cerr << "Creating MIDI Buffer " << _buf << ", capacity = " << _buf->capacity << endl;
}



/** Use another buffer's data instead of the local one.
 *
 * This buffer will essentially be identical to @a buf after this call.
 */
bool
MidiBuffer::join(Buffer* buf)
{
	MidiBuffer* mbuf = dynamic_cast<MidiBuffer*>(buf);
	if (!mbuf)
		return false;

	//assert(mbuf->size() == _size);
	
	_joined_buf = mbuf;
	
	_state = mbuf->_state;

	return true;
}

	
void
MidiBuffer::unjoin()
{
	_joined_buf = NULL;
	_state = &_local_state;
	_state->midi = _buf;

	clear();
	reset(_this_nframes);
}


bool
MidiBuffer::is_joined_to(Buffer* buf) const
{
	MidiBuffer* mbuf = dynamic_cast<MidiBuffer*>(buf);
	if (mbuf)
		return (data() == mbuf->data());

	return false;
}


void
MidiBuffer::prepare_read(SampleCount nframes)
{
	assert(!_joined_buf || data() == _joined_buf->data());
	
	reset(nframes);
}


void
MidiBuffer::prepare_write(SampleCount nframes)
{
	clear();
	reset(nframes);

	assert(!_joined_buf || data() == _joined_buf->data());
}


} // namespace Ingen