89 lines
2.5 KiB
C++
89 lines
2.5 KiB
C++
/*
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* Copyright (C) 2008-2011 David Robillard <d@drobilla.net>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef EVORAL_SMF_READER_HPP
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#define EVORAL_SMF_READER_HPP
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#include <exception>
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#include <stdexcept>
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#include <string>
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#include <inttypes.h>
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#include "evoral/visibility.h"
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namespace Evoral {
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/** Standard MIDI File (Type 0) Reader
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*
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* Currently this only reads SMF files with tempo-based timing.
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*/
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class LIBEVORAL_API SMFReader {
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public:
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class PrematureEOF : public std::exception {
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const char* what() const throw() { return "Unexpected end of file"; }
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};
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class CorruptFile : public std::exception {
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const char* what() const throw() { return "Corrupted file"; }
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};
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class UnsupportedTime : public std::exception {
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const char* what() const throw() { return "Unsupported time stamp type (SMPTE)"; }
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};
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SMFReader(const std::string& filename="");
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~SMFReader();
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bool open(const std::string& filename) throw (std::logic_error, UnsupportedTime);
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bool seek_to_track(unsigned track) throw (std::logic_error);
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const std::string& filename() const { return _filename; };
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uint16_t type() const { return _type; }
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uint16_t ppqn() const { return _ppqn; }
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uint16_t num_tracks() const { return _num_tracks; }
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int read_event(size_t buf_len,
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uint8_t* buf,
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uint32_t* ev_size,
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uint32_t* ev_delta_time)
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throw (std::logic_error, PrematureEOF, CorruptFile);
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void close();
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static uint32_t read_var_len(FILE* fd) throw (PrematureEOF);
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protected:
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/** size of SMF header, including MTrk chunk header */
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static const uint32_t HEADER_SIZE = 22;
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std::string _filename;
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FILE* _fd;
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uint16_t _type;
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uint16_t _ppqn;
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uint16_t _num_tracks;
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uint32_t _track;
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uint32_t _track_size;
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};
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} // namespace Evoral
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#endif // EVORAL_SMF_READER_HPP
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