src/music/midifile.hpp

   1 /*
   2 * This file is part of OpenTTD.
   3 * OpenTTD 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, version 2.
   4 * OpenTTD 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.
   5 * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
   6 */
   7
   8 /* @file midifile.hpp Parser for standard MIDI files */
   9
  10 #ifndef MUSIC_MIDIFILE_HPP
  11 #define MUSIC_MIDIFILE_HPP
  12
  13 #include "../stdafx.h"
  14 #include "../core/smallvec_type.hpp"
  15 #include "midi.h"
  16 #include <vector>
  17 #include <string>
  18
  19 struct MusicSongInfo;
  20
  21 struct MidiFile {
  22         struct DataBlock {
  23                 uint32 ticktime;        ///< tick number since start of file this block should be triggered at
  24                 uint32 realtime;        ///< real-time (microseconds) since start of file this block should be triggered at
  25                 std::vector<byte> data; ///< raw midi data contained in block
  26                 DataBlock(uint32 _ticktime = 0) : ticktime(_ticktime) { }
  27         };
  28         struct TempoChange {
  29                 uint32 ticktime; ///< tick number since start of file this tempo change occurs at
  30                 uint32 tempo;    ///< new tempo in microseconds per tick
  31                 TempoChange(uint32 _ticktime, uint32 _tempo) : ticktime(_ticktime), tempo(_tempo) { }
  32         };
  33
  34         std::vector<DataBlock> blocks;   ///< sequential time-annotated data of file, merged to a single track
  35         std::vector<TempoChange> tempos; ///< list of tempo changes in file
  36         uint16 tickdiv;                  ///< ticks per quarter note
  37
  38         MidiFile();
  39         ~MidiFile();
  40
  41         bool LoadFile(const char *filename);
  42         bool LoadMpsData(const byte *data, size_t length);
  43         bool LoadSong(const MusicSongInfo &song);
  44         void MoveFrom(MidiFile &other);
  45
  46         bool WriteSMF(const char *filename);
  47
  48         static std::string GetSMFFile(const MusicSongInfo &song);
  49         static bool ReadSMFHeader(const char *filename, SMFHeader &header);
  50         static bool ReadSMFHeader(FILE *file, SMFHeader &header);
  51 };
  52
  53 #endif /* MUSIC_MIDIFILE_HPP */