(svn r2685) -Codechange: Split the music/sound/video drivers into separate files and move them into subfolders.

This results in shorter and hopefully easier to maintain files.
Note: I had to change paths in #include statements of some unrelated files, because I added the ottd base directory to the include path (-I.)

11 files changed, 793 insertions, 0 deletions

diff --git a/music/bemidi.cpp b/music/bemidi.cpp
new file mode 100644
index 000000000..146df3031
--- /dev/null
+++ b/music/bemidi.cpp
@@ -0,0 +1,51 @@
+#include "stdafx.h"
+#include "openttd.h"
+#include "music/bemidi.h"
+
+// BeOS System Includes
+#include <MidiSynthFile.h>
+
+BMidiSynthFile midiSynthFile;
+
+static const char *bemidi_start(const char * const *parm)
+{
+	return NULL;
+}
+
+static void bemidi_stop(void)
+{
+	midiSynthFile.UnloadFile();
+}
+
+static void bemidi_play_song(const char *filename)
+{
+	bemidi_stop();
+	entry_ref midiRef;
+	get_ref_for_path(filename, &midiRef);
+	midiSynthFile.LoadFile(&midiRef);
+	midiSynthFile.Start();
+}
+
+static void bemidi_stop_song(void)
+{
+	midiSynthFile.UnloadFile();
+}
+
+static bool bemidi_is_playing(void)
+{
+	return !midiSynthFile.IsFinished();
+}
+
+static void bemidi_set_volume(byte vol)
+{
+	fprintf(stderr, "BeMidi: Set volume not implemented\n");
+}
+
+const HalMusicDriver _bemidi_music_driver = {
+	bemidi_start,
+	bemidi_stop,
+	bemidi_play_song,
+	bemidi_stop_song,
+	bemidi_is_playing,
+	bemidi_set_volume,
+};
diff --git a/music/bemidi.h b/music/bemidi.h
new file mode 100644
index 000000000..049bf3247
--- /dev/null
+++ b/music/bemidi.h
@@ -0,0 +1,8 @@
+#ifndef MUSIC_BEMIDI_H
+#define MUSIC_BEMIDI_H
+
+#include "hal.h"
+
+extern const HalMusicDriver _bemidi_music_driver;
+
+#endif
diff --git a/music/dmusic.c b/music/dmusic.c
new file mode 100644
index 000000000..8842537a4
--- /dev/null
+++ b/music/dmusic.c
@@ -0,0 +1,112 @@
+/*********************************************************************
+ * OpenTTD: An Open Source Transport Tycoon Deluxe clone             *
+ * Copyright (c) 2002-2004 OpenTTD Developers. All Rights Reserved.  *
+ *                                                                   *
+ * Web site: http://openttd.sourceforge.net/                         *
+ *********************************************************************/
+
+/*
+ * This program 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; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+/* DirectMusic driver for Win32 */
+/* Based on dxmci from TTDPatch */
+
+#include "stdafx.h"
+
+#ifdef WIN32_ENABLE_DIRECTMUSIC_SUPPORT
+
+#include "openttd.h"
+#include "string.h"
+#include "variables.h"
+#include "sound.h"
+#include "music/dmusic.h"
+
+static const char * DMusicMidiStart(const char * const *parm);
+static void DMusicMidiStop(void);
+static void DMusicMidiPlaySong(const char *filename);
+static void DMusicMidiStopSong(void);
+static bool DMusicMidiIsSongPlaying(void);
+static void DMusicMidiSetVolume(byte vol);
+
+const HalMusicDriver _dmusic_midi_driver = {
+	DMusicMidiStart,
+	DMusicMidiStop,
+	DMusicMidiPlaySong,
+	DMusicMidiStopSong,
+	DMusicMidiIsSongPlaying,
+	DMusicMidiSetVolume,
+};
+
+extern bool LoadMIDI (char *directory, char *filename);
+extern bool InitDirectMusic (void);
+extern void ReleaseSegment (void);
+extern void ShutdownDirectMusic (void);
+extern bool LoadMIDI (char *directory, char *filename);
+extern void PlaySegment (void);
+extern void StopSegment (void);
+extern bool IsSegmentPlaying (void);
+extern void SetVolume (long);
+
+static bool seeking = false;
+
+static const char * DMusicMidiStart(const char * const *parm)
+{
+	return InitDirectMusic() ? NULL : "Unable to initialize DirectMusic";
+}
+
+static void DMusicMidiStop(void)
+{
+	StopSegment();
+}
+
+static void DMusicMidiPlaySong(const char *filename)
+{
+	char *pos;
+	char dir[MAX_PATH];
+	char file[MAX_PATH];
+
+	// split full path into directory and file components
+	ttd_strlcpy(dir, filename, MAX_PATH);
+	pos = strrchr(dir, '\\') + 1;
+	ttd_strlcpy(file, pos, MAX_PATH);
+	*pos = '\0';
+
+	LoadMIDI(dir, file);
+	PlaySegment();
+	seeking = true;
+}
+
+static void DMusicMidiStopSong(void)
+{
+	StopSegment();
+}
+
+static bool DMusicMidiIsSongPlaying(void)
+{
+	/* Not the nicest code, but there is a short delay before playing actually 
+	 * starts. OpenTTD makes no provision for this. */
+	if (!IsSegmentPlaying() && seeking) return true;
+	if (IsSegmentPlaying()) seeking = false;
+
+	return IsSegmentPlaying();
+}
+
+static void DMusicMidiSetVolume(byte vol)
+{
+	SetVolume(vol);
+}
+
+#endif /* WIN32_ENABLE_DIRECTMUSIC_SUPPORT */
diff --git a/music/dmusic.h b/music/dmusic.h
new file mode 100644
index 000000000..dd05c2ced
--- /dev/null
+++ b/music/dmusic.h
@@ -0,0 +1,8 @@
+#ifndef MUSIC_DMUSIC_H
+#define MUSIC_DMUSIC_H
+
+#include "hal.h"
+
+extern const HalMusicDriver _dmusic_midi_driver;
+
+#endif
diff --git a/music/dmusic2.cpp b/music/dmusic2.cpp
new file mode 100644
index 000000000..ee8f71008
--- /dev/null
+++ b/music/dmusic2.cpp
@@ -0,0 +1,313 @@
+/*********************************************************************
+ * OpenTTD: An Open Source Transport Tycoon Deluxe clone             *
+ * Copyright (c) 2002-2004 OpenTTD Developers. All Rights Reserved.  *
+ *                                                                   *
+ * Web site: http://openttd.sourceforge.net/                         *
+ *********************************************************************/
+
+/*
+ * This program 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; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+/* DirectMusic driver for Win32 */
+/* Based on dxmci from TTDPatch */
+
+#include "stdafx.h"
+
+#ifdef WIN32_ENABLE_DIRECTMUSIC_SUPPORT
+
+// for gcc, the GUIDs are available in a library instead
+#ifndef __GNUC__
+#define INITGUID
+#endif
+
+#ifdef __cplusplus
+	extern "C" {
+#endif
+
+#include "openttd.h"
+#include "debug.h"
+#include "sound.h"
+#include "hal.h"
+
+#ifdef __cplusplus
+	}
+#endif
+
+#include <windows.h>
+#include <stdio.h>
+
+#include <dmksctrl.h>
+#include <dmusici.h>
+#include <dmusicc.h>
+#include <dmusicf.h>
+
+#define MSGBOX(output)	DEBUG(misc, 0) ("DirectMusic driver: %s\n", output); //MessageBox(NULL, output, "dxmci",MB_OK);
+
+static void MultiToWide(WCHAR* to, const char* from)
+{
+	MultiByteToWideChar(CP_ACP, MB_PRECOMPOSED, from, -1, to, _MAX_PATH);
+}
+
+// the performance object controls manipulation of  the segments
+static IDirectMusicPerformance *performance = NULL;
+
+// the segment object is where the MIDI data is stored for playback
+static IDirectMusicSegment *segment = NULL;
+
+// the loader bject can load many types of DMusic related files
+static IDirectMusicLoader *loader = NULL;
+
+// whether we've initialized COM or not (when deciding whether to shut down)
+static int COMInitialized = 0;
+
+
+extern "C" bool LoadLibraryList(void **proc, const char *dll);
+
+// Use lazy linking
+struct ProcPtrs {
+	unsigned long (WINAPI *CoCreateInstance)(REFCLSID rclsid, LPUNKNOWN pUnkOuter, DWORD dwClsContext, REFIID riid, LPVOID * ppv);
+	HRESULT (WINAPI *CoInitialize)(  LPVOID pvReserved );
+	void (WINAPI *CoUninitialize)( );
+};
+
+#define M(x) x "\0"
+static const char ole_files[] =
+	M("ole32.dll")
+	M("CoCreateInstance")
+	M("CoInitialize")
+	M("CoUninitialize")
+	M("")
+;
+#undef M
+
+
+static ProcPtrs _proc;
+
+static bool LoadOleDLL(void)
+{
+	if (_proc.CoCreateInstance != NULL)
+		return true;
+	if (!LoadLibraryList((void**)&_proc, ole_files))
+		return false;
+	return true;
+}
+
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+// Initialize COM and DirectMusic
+bool InitDirectMusic(void)
+{
+	if (NULL != performance)
+		return true;
+
+	// Initialize COM
+	if (!COMInitialized) {
+		if (!LoadOleDLL()) {
+			MSGBOX("ole32.dll load failed");
+			return false;
+		}
+
+		_proc.CoInitialize(NULL);
+		COMInitialized = 1;
+	}
+
+	// Create the performance object via CoCreateInstance
+	if (FAILED(_proc.CoCreateInstance(
+				CLSID_DirectMusicPerformance,
+				NULL,
+				CLSCTX_INPROC,
+				IID_IDirectMusicPerformance,
+				(LPVOID*)&performance
+			))) {
+		MSGBOX("Failed to create the performance object");
+		return false;
+	}
+
+	// Initialize it
+	if (FAILED(performance->Init(NULL, NULL, NULL))) {
+		MSGBOX("Failed to initialize performance object");
+		return false;
+	}
+
+	// Choose default Windows synth
+	if (FAILED(performance->AddPort(NULL))) {
+		MSGBOX("AddPort failed");
+		return false;
+	}
+
+	// now we'll create the loader object. This will be used to load the
+	// midi file for our demo. Again, we need to use CoCreateInstance
+	// and pass the appropriate ID parameters
+	if (FAILED(_proc.CoCreateInstance(
+				CLSID_DirectMusicLoader,
+				NULL,
+				CLSCTX_INPROC,
+				IID_IDirectMusicLoader,
+				(LPVOID*)&loader
+			))) {
+		MSGBOX("Failed to create loader object");
+		return false;
+	}
+
+	// that's it for initialization. If we made it this far we
+	// were successful.
+	return true;
+}
+
+// Releases memory used by all of the initialized
+// DirectMusic objects in the program
+void ReleaseSegment(void)
+{
+	if (NULL != segment) {
+		segment->Release();
+		segment = NULL;
+	}
+}
+
+void ShutdownDirectMusic(void)
+{
+	// release everything but the segment, which the performance
+	// will release automatically (and it'll crash if it's been
+	// released already)
+
+	if (NULL != loader) {
+		loader->Release();
+		loader = NULL;
+	}
+
+	if (NULL != performance) {
+		performance->CloseDown();
+		performance->Release();
+		performance = NULL;
+	}
+
+	if (COMInitialized) {
+		_proc.CoUninitialize();
+		COMInitialized = 0;
+	}
+}
+
+// Load MIDI file for playing
+bool LoadMIDI(const char *directory, const char *filename)
+{
+	DMUS_OBJECTDESC obj_desc;
+	WCHAR w_directory[_MAX_PATH];	// utf-16 version of the directory name.
+	WCHAR w_filename[_MAX_PATH];	// utf-16 version of the file name
+
+	if (NULL == performance)
+		return false;
+
+	MultiToWide(w_directory, directory);
+
+	if (FAILED(loader->SetSearchDirectory(
+				GUID_DirectMusicAllTypes, w_directory, FALSE
+			))) {
+		MSGBOX("LoadMIDI: SetSearchDirectory failed");
+		return false;
+	}
+
+	// set up the loader object info
+	ZeroMemory(&obj_desc, sizeof(obj_desc));
+	obj_desc.dwSize = sizeof(obj_desc);
+
+	MultiToWide(w_filename, filename);
+	obj_desc.guidClass = CLSID_DirectMusicSegment;
+
+	wcscpy(obj_desc.wszFileName, w_filename);
+	obj_desc.dwValidData = DMUS_OBJ_CLASS | DMUS_OBJ_FILENAME;
+
+	// release the existing segment if we have any
+	if (NULL != segment)
+		ReleaseSegment();
+
+	// and make a new segment
+	if (FAILED(loader->GetObject(
+				&obj_desc, IID_IDirectMusicSegment, (LPVOID*)&segment
+			))) {
+		MSGBOX("LoadMIDI: Get object failed");
+		return false;
+	}
+
+	// next we need to tell the segment what kind of data it contains. We do this
+	// with the IDirectMusicSegment::SetParam function.
+	if (FAILED(segment->SetParam(
+				GUID_StandardMIDIFile, 0xFFFFFFFF, 0, 0, performance
+			))) {
+		MSGBOX("LoadMIDI: SetParam (MIDI file) failed");
+		return false;
+	}
+
+	// finally, we need to tell the segment to 'download' the instruments
+	if (FAILED(segment->SetParam(GUID_Download, 0xFFFFFFFF, 0, 0, performance))) {
+		MSGBOX("LoadMIDI: Failed to download instruments");
+		return false;
+	}
+
+	// at this point, the MIDI file is loaded and ready to play!
+	return true;
+}
+
+// Start playing the MIDI file
+void PlaySegment(void)
+{
+	if (NULL == performance)
+		return;
+
+	if (FAILED(performance->PlaySegment(segment, 0, 0, NULL))) {
+		MSGBOX("PlaySegment failed");
+	}
+}
+
+// Stop playing
+void StopSegment(void)
+{
+	if (NULL == performance || NULL == segment)
+		return;
+
+	if (FAILED(performance->Stop(segment, NULL, 0, 0))) {
+		MSGBOX("StopSegment failed");
+	}
+}
+
+// Find out whether playing has started or stopped
+bool IsSegmentPlaying(void)
+{
+	if (NULL == performance || NULL == segment)
+		return false;
+
+	// IsPlaying return S_OK if the segment is currently playing
+	return performance->IsPlaying(segment, NULL) == S_OK;
+}
+
+void SetVolume(long vol)
+{
+	long db;
+
+	if (performance == NULL && !InitDirectMusic())
+		return;
+
+	db = ((vol >> 21) & 0x7ff) - 1000;
+	performance->SetGlobalParam(GUID_PerfMasterVolume, &db, sizeof(db));
+}
+
+#if defined(__cplusplus)
+}
+#endif
+
+#endif /* WIN32_ENABLE_DIRECTMUSIC_SUPPORT */
diff --git a/music/extmidi.c b/music/extmidi.c
new file mode 100644
index 000000000..031f7a383
--- /dev/null
+++ b/music/extmidi.c
@@ -0,0 +1,112 @@
+#ifndef __BEOS__
+#ifndef __MORPHOS__
+#include "stdafx.h"
+
+#include "openttd.h"
+#include "music/extmidi.h"
+#include "sound.h"
+#include "string.h"
+#include "variables.h"
+#include <fcntl.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <unistd.h>
+#include <signal.h>
+#include <sys/stat.h>
+#include <errno.h>
+
+static struct {
+	char song[MAX_PATH];
+	int pid;
+} _midi;
+
+static void DoPlay(void);
+static void DoStop(void);
+
+static const char* ExtMidiStart(const char* const * parm)
+{
+	_midi.song[0] = '\0';
+	_midi.pid = -1;
+	return NULL;
+}
+
+static void ExtMidiStop(void)
+{
+	_midi.song[0] = '\0';
+	DoStop();
+}
+
+static void ExtMidiPlaySong(const char* filename)
+{
+	ttd_strlcpy(_midi.song, filename, lengthof(_midi.song));
+	DoStop();
+}
+
+static void ExtMidiStopSong(void)
+{
+	_midi.song[0] = '\0';
+	DoStop();
+}
+
+static bool ExtMidiIsPlaying(void)
+{
+	if (_midi.pid != -1 && waitpid(_midi.pid, NULL, WNOHANG) == _midi.pid)
+		_midi.pid = -1;
+	if (_midi.pid == -1 && _midi.song[0] != '\0') DoPlay();
+	return _midi.pid != -1;
+}
+
+static void ExtMidiSetVolume(byte vol)
+{
+	fprintf(stderr, "extmidi: set volume not implemented\n");
+}
+
+static void DoPlay(void)
+{
+	_midi.pid = fork();
+	switch (_midi.pid) {
+		case 0: {
+			int d;
+
+			close(0);
+			close(1);
+			close(2);
+			d = open("/dev/null", O_RDONLY);
+			if (d != -1) {
+				if (dup2(d, 1) != -1 && dup2(d, 2) != -1) {
+					#if defined(MIDI_ARG)
+						execlp(msf.extmidi, "extmidi", MIDI_ARG, _midi.song, NULL);
+					#else
+						execlp(msf.extmidi, "extmidi", _midi.song, NULL);
+					#endif
+				}
+			}
+			exit(1);
+		}
+
+		case -1:
+			fprintf(stderr, "extmidi: couldn't fork: %s\n", strerror(errno));
+			/* FALLTHROUGH */
+
+		default:
+			_midi.song[0] = '\0';
+			break;
+	}
+}
+
+static void DoStop(void)
+{
+	if (_midi.pid != -1) kill(_midi.pid, SIGTERM);
+}
+
+const HalMusicDriver _extmidi_music_driver = {
+	ExtMidiStart,
+	ExtMidiStop,
+	ExtMidiPlaySong,
+	ExtMidiStopSong,
+	ExtMidiIsPlaying,
+	ExtMidiSetVolume,
+};
+
+#endif /* __MORPHOS__ */
+#endif /* __BEOS__ */
diff --git a/music/extmidi.h b/music/extmidi.h
new file mode 100644
index 000000000..3fb1848f7
--- /dev/null
+++ b/music/extmidi.h
@@ -0,0 +1,8 @@
+#ifndef MUSIC_EXTERNAL_H
+#define MUSIC_EXTERNAL_H
+
+#include "hal.h"
+
+extern const HalMusicDriver _extmidi_music_driver;
+
+#endif
diff --git a/music/null.c b/music/null.c
new file mode 100644
index 000000000..136f1d3e2
--- /dev/null
+++ b/music/null.c
@@ -0,0 +1,19 @@
+#include "stdafx.h"
+#include "openttd.h"
+#include "music/null.h"
+
+static const char* NullMidiStart(const char* const* parm) { return NULL; }
+static void NullMidiStop(void) {}
+static void NullMidiPlaySong(const char *filename) {}
+static void NullMidiStopSong(void) {}
+static bool NullMidiIsSongPlaying(void) { return true; }
+static void NullMidiSetVolume(byte vol) {}
+
+const HalMusicDriver _null_music_driver = {
+	NullMidiStart,
+	NullMidiStop,
+	NullMidiPlaySong,
+	NullMidiStopSong,
+	NullMidiIsSongPlaying,
+	NullMidiSetVolume,
+};
diff --git a/music/null.h b/music/null.h
new file mode 100644
index 000000000..5f0be7ca4
--- /dev/null
+++ b/music/null.h
@@ -0,0 +1,8 @@
+#ifndef MUSIC_NULL_H
+#define MUSIC_NULL_H
+
+#include "hal.h"
+
+extern const HalMusicDriver _null_music_driver;
+
+#endif
diff --git a/music/win32.c b/music/win32.c
new file mode 100644
index 000000000..eb4d42d25
--- /dev/null
+++ b/music/win32.c
@@ -0,0 +1,146 @@
+#include "stdafx.h"
+#include "openttd.h"
+#include "music/win32.h"
+#include <windows.h>
+
+static struct {
+	bool stop_song;
+	bool terminate;
+	bool playing;
+	int new_vol;
+	HANDLE wait_obj;
+	char start_song[260];
+} _midi;
+
+static void Win32MidiPlaySong(const char *filename)
+{
+	strcpy(_midi.start_song, filename);
+	_midi.playing = true;
+	_midi.stop_song = false;
+	SetEvent(_midi.wait_obj);
+}
+
+static void Win32MidiStopSong(void)
+{
+	if (_midi.playing) {
+		_midi.stop_song = true;
+		_midi.start_song[0] = '\0';
+		SetEvent(_midi.wait_obj);
+	}
+}
+
+static bool Win32MidiIsSongPlaying(void)
+{
+	return _midi.playing;
+}
+
+static void Win32MidiSetVolume(byte vol)
+{
+	_midi.new_vol = vol;
+	SetEvent(_midi.wait_obj);
+}
+
+static long CDECL MidiSendCommand(const char *cmd, ...) {
+	va_list va;
+	char buf[512];
+
+	va_start(va, cmd);
+	vsprintf(buf, cmd, va);
+	va_end(va);
+	return mciSendStringA(buf, NULL, 0, 0);
+}
+
+static bool MidiIntPlaySong(const char *filename)
+{
+	MidiSendCommand("close all");
+	if (MidiSendCommand("open \"%s\" type sequencer alias song", filename) != 0)
+		return false;
+
+	if (MidiSendCommand("play song from 0") != 0)
+		return false;
+	return true;
+}
+
+static void MidiIntStopSong(void)
+{
+	MidiSendCommand("close all");
+}
+
+static void MidiIntSetVolume(int vol)
+{
+	uint v = (vol * 65535 / 127);
+	midiOutSetVolume((HMIDIOUT)-1, v + (v << 16));
+}
+
+static bool MidiIntIsSongPlaying(void)
+{
+	char buf[16];
+	mciSendStringA("status song mode", buf, sizeof(buf), 0);
+	return strcmp(buf, "playing") == 0 || strcmp(buf, "seeking") == 0;
+}
+
+static DWORD WINAPI MidiThread(LPVOID arg)
+{
+	_midi.wait_obj = CreateEvent(NULL, FALSE, FALSE, NULL);
+
+	do {
+		char *s;
+		int vol;
+
+		vol = _midi.new_vol;
+		if (vol != -1) {
+			_midi.new_vol = -1;
+			MidiIntSetVolume(vol);
+		}
+
+		s = _midi.start_song;
+		if (s[0] != '\0') {
+			_midi.playing = MidiIntPlaySong(s);
+			s[0] = '\0';
+
+			// Delay somewhat in case we don't manage to play.
+			if (!_midi.playing) {
+				Sleep(5000);
+			}
+		}
+
+		if (_midi.stop_song && _midi.playing) {
+			_midi.stop_song = false;
+			_midi.playing = false;
+			MidiIntStopSong();
+		}
+
+		if (_midi.playing && !MidiIntIsSongPlaying())
+			_midi.playing = false;
+
+		WaitForMultipleObjects(1, &_midi.wait_obj, FALSE, 1000);
+	} while (!_midi.terminate);
+
+	DeleteObject(_midi.wait_obj);
+	return 0;
+}
+
+static const char *Win32MidiStart(const char * const *parm)
+{
+	DWORD threadId;
+
+	memset(&_midi, 0, sizeof(_midi));
+	_midi.new_vol = -1;
+	CreateThread(NULL, 8192, MidiThread, 0, 0, &threadId);
+	return 0;
+}
+
+static void Win32MidiStop(void)
+{
+	_midi.terminate = true;
+	SetEvent(_midi.wait_obj);
+}
+
+const HalMusicDriver _win32_music_driver = {
+	Win32MidiStart,
+	Win32MidiStop,
+	Win32MidiPlaySong,
+	Win32MidiStopSong,
+	Win32MidiIsSongPlaying,
+	Win32MidiSetVolume,
+};
diff --git a/music/win32.h b/music/win32.h
new file mode 100644
index 000000000..8a2a0fb2d
--- /dev/null
+++ b/music/win32.h
@@ -0,0 +1,8 @@
+#ifndef MUSIC_WIN32_H
+#define MUSIC_WIN32_H
+
+#include "hal.h"
+
+extern const HalMusicDriver _win32_music_driver;
+
+#endif