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/*
Copyright (C) 2008 Paul Davis
Written by Dave Robillard
This program 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.
This program 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 this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef __ardour_smf_reader_h__
#define __ardour_smf_reader_h__
#include <exception>
#include <stdexcept>
#include <string>
#include <inttypes.h>
namespace ARDOUR {
/** Standard MIDI File (Type 0) Reader
*
* Currently this only reads SMF files with tempo-based timing.
*/
class SMFReader {
public:
class PrematureEOF : public std::exception {
const char* what() const throw() { return "Unexpected end of file"; }
};
class CorruptFile : public std::exception {
const char* what() const throw() { return "Corrupted file"; }
};
class UnsupportedTime : public std::exception {
const char* what() const throw() { return "Unsupported time stamp type (SMPTE)"; }
};
SMFReader(const std::string filename="");
~SMFReader();
bool open(const std::string& filename) throw (std::logic_error, UnsupportedTime);
bool seek_to_track(unsigned track) throw (std::logic_error);
const std::string& filename() const { return _filename; };
uint16_t type() const { return _type; }
uint16_t ppqn() const { return _ppqn; }
uint16_t num_tracks() const { return _num_tracks; }
int read_event(size_t buf_len,
uint8_t* buf,
uint32_t* ev_size,
uint32_t* ev_delta_time)
throw (std::logic_error, PrematureEOF, CorruptFile);
void close();
static uint32_t read_var_len(FILE* fd) throw (PrematureEOF);
protected:
/** size of SMF header, including MTrk chunk header */
static const uint32_t HEADER_SIZE = 22;
std::string _filename;
FILE* _fd;
uint16_t _type;
uint16_t _ppqn;
uint16_t _num_tracks;
uint32_t _track;
uint32_t _track_size;
};
} // namespace ARDOUR
#endif /* __ardour_smf_reader_h__ */
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