1 files changed, 146 insertions, 0 deletions
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,
+};