/*
  This file is part of Raul.
  Copyright 2007-2012 David Robillard <http://drobilla.net>

  Raul 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 3 of the License, or any later version.

  Raul 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 Raul.  If not, see <http://www.gnu.org/licenses/>.
*/

#ifndef RAUL_SMF_WRITER_HPP
#define RAUL_SMF_WRITER_HPP

#include <stdexcept>
#include <string>

#include "raul/MIDISink.hpp"
#include "raul/TimeStamp.hpp"

namespace Raul {

/** Standard Midi File (Type 0) Writer
 * \ingroup raul
 */
class SMFWriter : public Raul::MIDISink {
public:
	explicit SMFWriter(TimeUnit unit);
	~SMFWriter();

	bool start(const std::string& filename,
	           TimeStamp          start_time) throw (std::logic_error);

	TimeUnit unit() const { return _unit; }

	void write_event(TimeStamp            time,
	                 size_t               ev_size,
	                 const unsigned char* ev) throw (std::logic_error);

	void flush();

	void finish() throw (std::logic_error);

protected:
	static const uint32_t VAR_LEN_MAX = 0x0FFFFFFF;

	void write_header();
	void write_footer();

	void     write_chunk_header(const char id[4], uint32_t length);
	void     write_chunk(const char id[4], uint32_t length, void* data);
	size_t   write_var_len(uint32_t val);

	std::string     _filename;
	FILE*           _fd;
	TimeUnit        _unit;
	Raul::TimeStamp _start_time;
	Raul::TimeStamp _last_ev_time; ///< Time last event was written relative to _start_time
	uint32_t        _track_size;
	uint32_t        _header_size; ///< size of SMF header, including MTrk chunk header
};

} // namespace Raul

#endif // RAUL_SMF_WRITER_HPP