96 lines
2.8 KiB
C++
96 lines
2.8 KiB
C++
/* This file is part of Evoral.
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* Copyright(C) 2008 David Robillard <http://drobilla.net>
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* Copyright(C) 2000-2008 Paul Davis
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* Author: Hans Baier
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*
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* Evoral is free software; you can redistribute it and/or modify it under the
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* terms of the GNU General Public License as published by the Free Software
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* Foundation; either version 2 of the License, or(at your option) any later
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* version.
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*
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* Evoral is distributed in the hope that it will be useful, but WITHOUT ANY
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* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GNU General Public License for 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 St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef EVORAL_SMF_HPP
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#define EVORAL_SMF_HPP
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#include <glibmm/threads.h>
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#include <set>
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#include "evoral/visibility.h"
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#include "evoral/types.hpp"
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struct smf_struct;
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struct smf_track_struct;
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typedef smf_struct smf_t;
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typedef smf_track_struct smf_track_t;
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namespace Evoral {
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#define THROW_FILE_ERROR throw(FileError)
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/** Standard Midi File.
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* Currently only tempo-based time of a given PPQN is supported.
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*/
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class LIBEVORAL_API SMF {
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public:
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class FileError : public std::exception {
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public:
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FileError (std::string const & n) : _file_name (n) {}
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~FileError () throw () {}
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const char* what() const throw() { return "Unknown SMF error"; }
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std::string file_name () const { return _file_name; }
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private:
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std::string _file_name;
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};
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SMF();
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virtual ~SMF();
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static bool test(const std::string& path);
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int open(const std::string& path, int track=1) THROW_FILE_ERROR;
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// XXX 19200 = 10 * Timecode::BBT_Time::ticks_per_beat
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int create(const std::string& path, int track=1, uint16_t ppqn=19200) THROW_FILE_ERROR;
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void close() THROW_FILE_ERROR;
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void seek_to_start() const;
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int seek_to_track(int track);
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int read_event(uint32_t* delta_t, uint32_t* size, uint8_t** buf, event_id_t* note_id) const;
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uint16_t num_tracks() const;
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uint16_t ppqn() const;
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bool is_empty() const { return _empty; }
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void begin_write();
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void append_event_delta(uint32_t delta_t, uint32_t size, const uint8_t* buf, event_id_t note_id);
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void end_write(std::string const &) THROW_FILE_ERROR;
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void flush() {};
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double round_to_file_precision (double val) const;
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bool is_type0 () const { return _type0; }
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std::set<uint8_t> channels () const { return _type0channels; }
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private:
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smf_t* _smf;
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smf_track_t* _smf_track;
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bool _empty; ///< true iff file contains(non-empty) events
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mutable Glib::Threads::Mutex _smf_lock;
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bool _type0;
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std::set<uint8_t> _type0channels;
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};
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}; /* namespace Evoral */
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#endif /* EVORAL_SMF_HPP */
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