Codechange: Pass a MusicSongInfo struct instead of bare filename to music drivers.

Preparation for later extending the info passed to music drivers.

23 files changed, 85 insertions, 41 deletions

diff --git a/src/base_media_base.h b/src/base_media_base.h
index 7614118b7..15f4372fb 100644
--- a/src/base_media_base.h
+++ b/src/base_media_base.h
@@ -285,11 +285,23 @@ static const uint NUM_SONGS_AVAILABLE = 1 + NUM_SONG_CLASSES * NUM_SONGS_CLASS;
 /** Maximum number of songs in the (custom) playlist */
 static const uint NUM_SONGS_PLAYLIST  = 32;
 
+enum MusicTrackType {
+	MTT_STANDARDMIDI, ///< Standard MIDI file
+};
+
+/** Metadata about a music track. */
+struct MusicSongInfo {
+	char songname[32];       ///< name of song displayed in UI
+	byte tracknr;            ///< track number of song displayed in UI
+	const char *filename;    ///< file on disk containing song (when used in MusicSet class, this pointer is owned by MD5File object for the file)
+	MusicTrackType filetype; ///< decoder required for song file
+};
+
 /** All data of a music set. */
 struct MusicSet : BaseSet<MusicSet, NUM_SONGS_AVAILABLE, false> {
-	/** The name of the different songs. */
-	char song_name[NUM_SONGS_AVAILABLE][32];
-	byte track_nr[NUM_SONGS_AVAILABLE];
+	/** Data about individual songs in set. */
+	MusicSongInfo songinfo[NUM_SONGS_AVAILABLE];
+	/** Number of valid songs in set. */
 	byte num_available;
 
 	bool FillSetDetails(struct IniFile *ini, const char *path, const char *full_filename);
diff --git a/src/music.cpp b/src/music.cpp
index 4001e621e..5bfe62ebd 100644
--- a/src/music.cpp
+++ b/src/music.cpp
@@ -66,13 +66,16 @@ bool MusicSet::FillSetDetails(IniFile *ini, const char *path, const char *full_f
 	if (ret) {
 		this->num_available = 0;
 		IniGroup *names = ini->GetGroup("names");
-		for (uint i = 0, j = 1; i < lengthof(this->song_name); i++) {
+		for (uint i = 0, j = 1; i < lengthof(this->songinfo); i++) {
 			const char *filename = this->files[i].filename;
 			if (names == NULL || StrEmpty(filename)) {
-				this->song_name[i][0] = '\0';
+				this->songinfo[i].songname[0] = '\0';
 				continue;
 			}
 
+			this->songinfo[i].filename = filename; // non-owned pointer
+			this->songinfo[i].filetype = MTT_STANDARDMIDI;
+
 			IniItem *item = NULL;
 			/* As we possibly add a path to the filename and we compare
 			 * on the filename with the path as in the .obm, we need to
@@ -91,8 +94,8 @@ bool MusicSet::FillSetDetails(IniFile *ini, const char *path, const char *full_f
 				return false;
 			}
 
-			strecpy(this->song_name[i], item->value, lastof(this->song_name[i]));
-			this->track_nr[i] = j++;
+			strecpy(this->songinfo[i].songname, item->value, lastof(this->songinfo[i].songname));
+			this->songinfo[i].tracknr = j++;
 			this->num_available++;
 		}
 	}
diff --git a/src/music/allegro_m.cpp b/src/music/allegro_m.cpp
index 77b488186..fee5bf8a0 100644
--- a/src/music/allegro_m.cpp
+++ b/src/music/allegro_m.cpp
@@ -58,10 +58,12 @@ void MusicDriver_Allegro::Stop()
 	if (--_allegro_instance_count == 0) allegro_exit();
 }
 
-void MusicDriver_Allegro::PlaySong(const char *filename)
+void MusicDriver_Allegro::PlaySong(const MusicSongInfo &song)
 {
+	if (song.filetype != MTT_STANDARDMIDI) return;
+
 	if (_midi != NULL) destroy_midi(_midi);
-	_midi = load_midi(filename);
+	_midi = load_midi(song.filename);
 	play_midi(_midi, false);
 }
 
diff --git a/src/music/allegro_m.h b/src/music/allegro_m.h
index 69cf59569..65d8ab811 100644
--- a/src/music/allegro_m.h
+++ b/src/music/allegro_m.h
@@ -21,7 +21,7 @@ public:
 
 	/* virtual */ void Stop();
 
-	/* virtual */ void PlaySong(const char *filename);
+	/* virtual */ void PlaySong(const MusicSongInfo &song);
 
 	/* virtual */ void StopSong();
 
diff --git a/src/music/bemidi.cpp b/src/music/bemidi.cpp
index 2bc207476..7d5793f0d 100644
--- a/src/music/bemidi.cpp
+++ b/src/music/bemidi.cpp
@@ -12,6 +12,7 @@
 #include "../stdafx.h"
 #include "../openttd.h"
 #include "bemidi.h"
+#include "../base_media_base.h"
 
 /* BeOS System Includes */
 #include <MidiSynthFile.h>
@@ -34,11 +35,13 @@ void MusicDriver_BeMidi::Stop()
 	midiSynthFile.UnloadFile();
 }
 
-void MusicDriver_BeMidi::PlaySong(const char *filename)
+void MusicDriver_BeMidi::PlaySong(const MusicSongInfo &song)
 {
+	if (song.filetype != MTT_STANDARDMIDI) return;
+
 	this->Stop();
 	entry_ref midiRef;
-	get_ref_for_path(filename, &midiRef);
+	get_ref_for_path(song.filename, &midiRef);
 	midiSynthFile.LoadFile(&midiRef);
 	midiSynthFile.Start();
 }
diff --git a/src/music/bemidi.h b/src/music/bemidi.h
index 23c6249d5..7c546525d 100644
--- a/src/music/bemidi.h
+++ b/src/music/bemidi.h
@@ -21,7 +21,7 @@ public:
 
 	/* virtual */ void Stop();
 
-	/* virtual */ void PlaySong(const char *filename);
+	/* virtual */ void PlaySong(const MusicSongInfo &song);
 
 	/* virtual */ void StopSong();
 
diff --git a/src/music/cocoa_m.cpp b/src/music/cocoa_m.cpp
index 925dc21ab..9dcd12cf0 100644
--- a/src/music/cocoa_m.cpp
+++ b/src/music/cocoa_m.cpp
@@ -19,6 +19,7 @@
 #include "../os/macosx/macos.h"
 #include "cocoa_m.h"
 #include "../debug.h"
+#include "../base_media_base.h"
 
 #define Rect        OTTDRect
 #define Point       OTTDPoint
@@ -143,8 +144,10 @@ void MusicDriver_Cocoa::Stop()
  *
  * @param filename Path to a MIDI file.
  */
-void MusicDriver_Cocoa::PlaySong(const char *filename)
+void MusicDriver_Cocoa::PlaySong(const MusicSongInfo &song)
 {
+	if (song.filetype != MTT_STANDARDMIDI) return;
+
 	DEBUG(driver, 2, "cocoa_m: trying to play '%s'", filename);
 
 	this->StopSong();
@@ -158,7 +161,7 @@ void MusicDriver_Cocoa::PlaySong(const char *filename)
 		return;
 	}
 
-	const char *os_file = OTTD2FS(filename);
+	const char *os_file = OTTD2FS(song.filename);
 	CFURLRef url = CFURLCreateFromFileSystemRepresentation(kCFAllocatorDefault, (const UInt8*)os_file, strlen(os_file), false);
 
 #if (MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_5)
diff --git a/src/music/cocoa_m.h b/src/music/cocoa_m.h
index 1963bef5b..fdb10b84e 100644
--- a/src/music/cocoa_m.h
+++ b/src/music/cocoa_m.h
@@ -20,7 +20,7 @@ public:
 
 	/* virtual */ void Stop();
 
-	/* virtual */ void PlaySong(const char *filename);
+	/* virtual */ void PlaySong(const MusicSongInfo &song);
 
 	/* virtual */ void StopSong();
 
diff --git a/src/music/dmusic.cpp b/src/music/dmusic.cpp
index 934bb9fe2..b874924f2 100644
--- a/src/music/dmusic.cpp
+++ b/src/music/dmusic.cpp
@@ -21,6 +21,7 @@
 #include "../core/mem_func.hpp"
 #include "../thread/thread.h"
 #include "../fileio_func.h"
+#include "../base_media_base.h"
 #include "dmusic.h"
 #include "midifile.hpp"
 #include "midi.h"
@@ -1225,11 +1226,13 @@ void MusicDriver_DMusic::Stop()
 }
 
 
-void MusicDriver_DMusic::PlaySong(const char *filename)
+void MusicDriver_DMusic::PlaySong(const MusicSongInfo &song)
 {
+	if (song.filetype != MTT_STANDARDMIDI) return;
+
 	ThreadMutexLocker lock(_thread_mutex);
 
-	_playback.next_file.LoadFile(filename);
+	_playback.next_file.LoadFile(song.filename);
 	_playback.next_segment.start = 0;
 	_playback.next_segment.end = 0;
 	_playback.next_segment.loop = false;
diff --git a/src/music/dmusic.h b/src/music/dmusic.h
index 7287623e4..527e064e4 100644
--- a/src/music/dmusic.h
+++ b/src/music/dmusic.h
@@ -23,7 +23,7 @@ public:
 
 	/* virtual */ void Stop();
 
-	/* virtual */ void PlaySong(const char *filename);
+	/* virtual */ void PlaySong(const MusicSongInfo &song);
 
 	/* virtual */ void StopSong();
 
diff --git a/src/music/extmidi.cpp b/src/music/extmidi.cpp
index d39a050f6..c532e9d44 100644
--- a/src/music/extmidi.cpp
+++ b/src/music/extmidi.cpp
@@ -17,6 +17,7 @@
 #include "../video/video_driver.hpp"
 #include "../gfx_func.h"
 #include "extmidi.h"
+#include "../base_media_base.h"
 #include <fcntl.h>
 #include <sys/types.h>
 #include <sys/wait.h>
@@ -83,9 +84,11 @@ void MusicDriver_ExtMidi::Stop()
 	this->DoStop();
 }
 
-void MusicDriver_ExtMidi::PlaySong(const char *filename)
+void MusicDriver_ExtMidi::PlaySong(const MusicSongInfo &song)
 {
-	strecpy(this->song, filename, lastof(this->song));
+	if (song.filetype != MTT_STANDARDMIDI) return;
+
+	strecpy(this->song, song.filename, lastof(this->song));
 	this->DoStop();
 }
 
diff --git a/src/music/extmidi.h b/src/music/extmidi.h
index cfbd89459..e174dc9b0 100644
--- a/src/music/extmidi.h
+++ b/src/music/extmidi.h
@@ -28,7 +28,7 @@ public:
 
 	/* virtual */ void Stop();
 
-	/* virtual */ void PlaySong(const char *filename);
+	/* virtual */ void PlaySong(const MusicSongInfo &song);
 
 	/* virtual */ void StopSong();
 
diff --git a/src/music/libtimidity.cpp b/src/music/libtimidity.cpp
index 93284bd83..f198280dc 100644
--- a/src/music/libtimidity.cpp
+++ b/src/music/libtimidity.cpp
@@ -14,6 +14,7 @@
 #include "../sound_type.h"
 #include "../debug.h"
 #include "libtimidity.h"
+#include "../base_media_base.h"
 #include <fcntl.h>
 #include <sys/types.h>
 #include <sys/wait.h>
@@ -73,11 +74,13 @@ void MusicDriver_LibTimidity::Stop()
 	mid_exit();
 }
 
-void MusicDriver_LibTimidity::PlaySong(const char *filename)
+void MusicDriver_LibTimidity::PlaySong(const MusicSongInfo &song)
 {
+	if (song.filetype != MTT_STANDARDMIDI) return;
+
 	this->StopSong();
 
-	_midi.stream = mid_istream_open_file(filename);
+	_midi.stream = mid_istream_open_file(song.filename);
 	if (_midi.stream == NULL) {
 		DEBUG(driver, 0, "Could not open music file");
 		return;
diff --git a/src/music/libtimidity.h b/src/music/libtimidity.h
index abe17e770..badb05bab 100644
--- a/src/music/libtimidity.h
+++ b/src/music/libtimidity.h
@@ -21,7 +21,7 @@ public:
 
 	/* virtual */ void Stop();
 
-	/* virtual */ void PlaySong(const char *filename);
+	/* virtual */ void PlaySong(const MusicSongInfo &song);
 
 	/* virtual */ void StopSong();
 
diff --git a/src/music/music_driver.hpp b/src/music/music_driver.hpp
index be09d3ea2..10a99d275 100644
--- a/src/music/music_driver.hpp
+++ b/src/music/music_driver.hpp
@@ -14,6 +14,8 @@
 
 #include "../driver.h"
 
+struct MusicSongInfo;
+
 /** Driver for all music playback. */
 class MusicDriver : public Driver {
 public:
@@ -21,7 +23,7 @@ public:
 	 * Play a particular song.
 	 * @param filename The name of file with the song to play.
 	 */
-	virtual void PlaySong(const char *filename) = 0;
+	virtual void PlaySong(const MusicSongInfo &song) = 0;
 
 	/**
 	 * Stop playing the current song.
diff --git a/src/music/null_m.h b/src/music/null_m.h
index df9f7d80d..51e1a0665 100644
--- a/src/music/null_m.h
+++ b/src/music/null_m.h
@@ -21,7 +21,7 @@ public:
 
 	/* virtual */ void Stop() { }
 
-	/* virtual */ void PlaySong(const char *filename) { }
+	/* virtual */ void PlaySong(const MusicSongInfo &song) { }
 
 	/* virtual */ void StopSong() { }
 
diff --git a/src/music/os2_m.cpp b/src/music/os2_m.cpp
index d7fb97d2d..e308bac0d 100644
--- a/src/music/os2_m.cpp
+++ b/src/music/os2_m.cpp
@@ -12,6 +12,7 @@
 #include "../stdafx.h"
 #include "../openttd.h"
 #include "os2_m.h"
+#include "../base_media_base.h"
 
 #define INCL_DOS
 #define INCL_OS2MM
@@ -49,11 +50,13 @@ static long CDECL MidiSendCommand(const char *cmd, ...)
 /** OS/2's music player's factory. */
 static FMusicDriver_OS2 iFMusicDriver_OS2;
 
-void MusicDriver_OS2::PlaySong(const char *filename)
+void MusicDriver_OS2::PlaySong(const MusicSongInfo &song)
 {
+	if (song.filetype != MTT_STANDARDMIDI) return;
+
 	MidiSendCommand("close all");
 
-	if (MidiSendCommand("open %s type sequencer alias song", filename) != 0) {
+	if (MidiSendCommand("open %s type sequencer alias song", song.filename) != 0) {
 		return;
 	}
 
diff --git a/src/music/os2_m.h b/src/music/os2_m.h
index f35e2fdcf..ac7cd0319 100644
--- a/src/music/os2_m.h
+++ b/src/music/os2_m.h
@@ -21,7 +21,7 @@ public:
 
 	/* virtual */ void Stop();
 
-	/* virtual */ void PlaySong(const char *filename);
+	/* virtual */ void PlaySong(const MusicSongInfo &song);
 
 	/* virtual */ void StopSong();
 
diff --git a/src/music/qtmidi.cpp b/src/music/qtmidi.cpp
index 9bc6a6174..4cd01691d 100644
--- a/src/music/qtmidi.cpp
+++ b/src/music/qtmidi.cpp
@@ -31,6 +31,7 @@
 #include "../stdafx.h"
 #include "qtmidi.h"
 #include "../debug.h"
+#include "../base_media_base.h"
 
 #define Rect  OTTDRect
 #define Point OTTDPoint
@@ -258,8 +259,9 @@ void MusicDriver_QtMidi::Stop()
  *
  * @param filename Path to a MIDI file.
  */
-void MusicDriver_QtMidi::PlaySong(const char *filename)
+void MusicDriver_QtMidi::PlaySong(const MusicSongInfo &song)
 {
+	if (song.filetype != MTT_STANDARDMIDI) return;
 	if (!_quicktime_started) return;
 
 	DEBUG(driver, 2, "qtmidi: trying to play '%s'", filename);
@@ -276,7 +278,7 @@ void MusicDriver_QtMidi::PlaySong(const char *filename)
 			FALLTHROUGH;
 
 		case QT_STATE_IDLE:
-			LoadMovieForMIDIFile(filename, &_quicktime_movie);
+			LoadMovieForMIDIFile(song.filename, &_quicktime_movie);
 			SetMovieVolume(_quicktime_movie, VOLUME);
 			StartMovie(_quicktime_movie);
 			_quicktime_state = QT_STATE_PLAY;
diff --git a/src/music/qtmidi.h b/src/music/qtmidi.h
index f0e17086e..32163db93 100644
--- a/src/music/qtmidi.h
+++ b/src/music/qtmidi.h
@@ -20,7 +20,7 @@ public:
 
 	/* virtual */ void Stop();
 
-	/* virtual */ void PlaySong(const char *filename);
+	/* virtual */ void PlaySong(const MusicSongInfo &song);
 
 	/* virtual */ void StopSong();
 
diff --git a/src/music/win32_m.cpp b/src/music/win32_m.cpp
index edaae36fa..8e5adeab2 100644
--- a/src/music/win32_m.cpp
+++ b/src/music/win32_m.cpp
@@ -18,6 +18,7 @@
 #include "../debug.h"
 #include "midifile.hpp"
 #include "midi.h"
+#include "../base_media_base.h"
 
 #include "../safeguards.h"
 
@@ -304,12 +305,14 @@ void CALLBACK TimerCallback(UINT uTimerID, UINT, DWORD_PTR dwUser, DWORD_PTR, DW
 	}
 }
 
-void MusicDriver_Win32::PlaySong(const char *filename)
+void MusicDriver_Win32::PlaySong(const MusicSongInfo &song)
 {
+	if (song.filetype != MTT_STANDARDMIDI) return;
+
 	DEBUG(driver, 2, "Win32-MIDI: PlaySong: entry");
 	EnterCriticalSection(&_midi.lock);
 
-	_midi.next_file.LoadFile(filename);
+	_midi.next_file.LoadFile(song.filename);
 	_midi.next_segment.start = 0;
 	_midi.next_segment.end = 0;
 	_midi.next_segment.loop = false;
diff --git a/src/music/win32_m.h b/src/music/win32_m.h
index 3efee3243..1ac8ae69e 100644
--- a/src/music/win32_m.h
+++ b/src/music/win32_m.h
@@ -21,7 +21,7 @@ public:
 
 	/* virtual */ void Stop();
 
-	/* virtual */ void PlaySong(const char *filename);
+	/* virtual */ void PlaySong(const MusicSongInfo &song);
 
 	/* virtual */ void StopSong();
 
diff --git a/src/music_gui.cpp b/src/music_gui.cpp
index 25bb41314..4333e889c 100644
--- a/src/music_gui.cpp
+++ b/src/music_gui.cpp
@@ -42,7 +42,7 @@
  */
 static const char *GetSongName(int index)
 {
-	return BaseMusic::GetUsedSet()->song_name[index];
+	return BaseMusic::GetUsedSet()->songinfo[index].songname;
 }
 
 /**
@@ -52,7 +52,7 @@ static const char *GetSongName(int index)
  */
 static int GetTrackNumber(int index)
 {
-	return BaseMusic::GetUsedSet()->track_nr[index];
+	return BaseMusic::GetUsedSet()->songinfo[index].tracknr;
 }
 
 /** The currently played song */
@@ -186,10 +186,12 @@ static void MusicVolumeChanged(byte new_vol)
 static void DoPlaySong()
 {
 	char filename[MAX_PATH];
-	if (FioFindFullPath(filename, lastof(filename), BASESET_DIR, BaseMusic::GetUsedSet()->files[_music_wnd_cursong - 1].filename) == NULL) {
-		FioFindFullPath(filename, lastof(filename), OLD_GM_DIR, BaseMusic::GetUsedSet()->files[_music_wnd_cursong - 1].filename);
+	MusicSongInfo songinfo = BaseMusic::GetUsedSet()->songinfo[_music_wnd_cursong - 1]; // copy
+	if (FioFindFullPath(filename, lastof(filename), BASESET_DIR, songinfo.filename) == NULL) {
+		FioFindFullPath(filename, lastof(filename), OLD_GM_DIR, songinfo.filename);
 	}
-	MusicDriver::GetInstance()->PlaySong(filename);
+	songinfo.filename = filename; // non-owned pointer
+	MusicDriver::GetInstance()->PlaySong(songinfo);
 	SetWindowDirty(WC_MUSIC_WINDOW, 0);
 }