1 /* This file is part of Evoral.
2 * Copyright(C) 2008 David Robillard <http://drobilla.net>
3 * Copyright(C) 2000-2008 Paul Davis
6 * Evoral is free software; you can redistribute it and/or modify it under the
7 * terms of the GNU General Public License as published by the Free Software
8 * Foundation; either version 2 of the License, or(at your option) any later
11 * Evoral is distributed in the hope that it will be useful, but WITHOUT ANY
12 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
13 * FOR A PARTICULAR PURPOSE. See the GNU General Public License for details.
15 * You should have received a copy of the GNU General Public License along
16 * with this program; if not, write to the Free Software Foundation, Inc.,
17 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
20 #ifndef EVORAL_SMF_HPP
21 #define EVORAL_SMF_HPP
23 #include <glibmm/threads.h>
25 #include "evoral/visibility.h"
26 #include "evoral/types.hpp"
29 struct smf_track_struct;
30 typedef smf_struct smf_t;
31 typedef smf_track_struct smf_track_t;
35 #define THROW_FILE_ERROR throw(FileError)
37 /** Standard Midi File.
38 * Currently only tempo-based time of a given PPQN is supported.
40 class LIBEVORAL_API SMF {
42 class FileError : public std::exception {
44 FileError (std::string const & n) : _file_name (n) {}
45 ~FileError () throw () {}
46 const char* what() const throw() { return "Unknown SMF error"; }
47 std::string file_name () const { return _file_name; }
49 std::string _file_name;
52 SMF() : _smf(0), _smf_track(0), _empty(true) {};
55 static bool test(const std::string& path);
56 int open(const std::string& path, int track=1) THROW_FILE_ERROR;
57 // XXX 19200 = 10 * Timecode::BBT_Time::ticks_per_beat
58 int create(const std::string& path, int track=1, uint16_t ppqn=19200) THROW_FILE_ERROR;
59 void close() THROW_FILE_ERROR;
61 const std::string& file_path() const { return _file_path; };
63 void seek_to_start() const;
64 int seek_to_track(int track);
66 int read_event(uint32_t* delta_t, uint32_t* size, uint8_t** buf, event_id_t* note_id) const;
68 uint16_t num_tracks() const;
69 uint16_t ppqn() const;
70 bool is_empty() const { return _empty; }
73 void append_event_delta(uint32_t delta_t, uint32_t size, const uint8_t* buf, event_id_t note_id);
74 void end_write() THROW_FILE_ERROR;
78 double round_to_file_precision (double val) const;
81 void set_path (const std::string& p);
84 std::string _file_path;
86 smf_track_t* _smf_track;
87 bool _empty; ///< true iff file contains(non-empty) events
88 mutable Glib::Threads::Mutex _smf_lock;
91 }; /* namespace Evoral */
93 #endif /* EVORAL_SMF_HPP */