SMFWriter.hpp

/* This file is part of Raul.
 * Copyright (C) 2007-2009 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 2 of the License, or (at your option) 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 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 RAUL_SMF_WRITER_HPP
#define RAUL_SMF_WRITER_HPP

#include <stdexcept>
#include <string>

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

namespace 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; 
    uint32_t        _track_size;
    uint32_t        _header_size; 
};


} // namespace Raul

#endif // RAUL_SMF_WRITER_HPP