/* This file is part of Evoral.
* Copyright(C) 2008 Dave Robillard <http://drobilla.net>
* Copyright(C) 2000-2008 Paul Davis
+ * Author: Hans Baier
*
* Evoral 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
#ifndef EVORAL_SMF_HPP
#define EVORAL_SMF_HPP
-#include <string>
-#include "evoral/types.hpp"
+#include <cassert>
+
+struct smf_struct;
+struct smf_track_struct;
+typedef smf_struct smf_t;
+typedef smf_track_struct smf_track_t;
namespace Evoral {
-class Event;
-class EventRingBuffer;
-
+#define THROW_FILE_ERROR throw(FileError)
-/** Standard Midi File (Type 0)
+/** Standard Midi File.
+ * Currently only tempo-based time of a given PPQN is supported.
*/
class SMF {
public:
- SMF();
- virtual ~SMF();
+ class FileError : public std::exception {
+ const char* what() const throw() { return "Unknown SMF error"; }
+ };
- void seek_to_start() const;
+ SMF() : _smf(0), _smf_track(0), _empty(true) {};
+ virtual ~SMF();
- uint16_t ppqn() const { return _ppqn; }
- bool is_empty() const { return _empty; }
- bool eof() const { return feof(_fd); }
+ int open(const std::string& path, int track=1) THROW_FILE_ERROR;
+ int create(const std::string& path, int track=1, uint16_t ppqn=19200) THROW_FILE_ERROR;
+ void close() THROW_FILE_ERROR;
- EventTime last_event_time() const { return _last_ev_time; }
+ const std::string& file_path() const { return _file_path; };
+
+ void seek_to_start() const;
+ int seek_to_track(int track);
- void begin_write(FrameTime start_time);
- void append_event_unlocked(uint32_t delta_t, const Evoral::Event& ev);
- void end_write();
+ int read_event(uint32_t* delta_t, uint32_t* size, uint8_t** buf) const;
- void flush();
- int flush_header();
- int flush_footer();
-
-protected:
- int open(const std::string& path);
- void close();
+ uint16_t num_tracks() const;
+ uint16_t ppqn() const;
+ bool is_empty() const { return _empty; }
- /** Used by flush_footer() to find the position to write the footer */
- void seek_to_footer_position();
+ void begin_write();
+ void append_event_delta(uint32_t delta_t, uint32_t size, const uint8_t* buf);
+ void end_write() THROW_FILE_ERROR;
- /** Write the track footer at the current seek position */
- 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);
- uint32_t read_var_len() const;
- int read_event(uint32_t* delta_t, uint32_t* size, uint8_t** buf) const;
+ void flush() {};
private:
- static const uint16_t _ppqn = 19200;
-
- FILE* _fd;
- EventTime _last_ev_time; ///< last frame time written, relative to source start
- uint32_t _track_size;
- uint32_t _header_size; ///< size of SMF header, including MTrk chunk header
- bool _empty; ///< true iff file contains(non-empty) events
+ std::string _file_path;
+ smf_t* _smf;
+ smf_track_t* _smf_track;
+ bool _empty; ///< true iff file contains(non-empty) events
};
}; /* namespace Evoral */