(svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)

src/music/win32_m.cpp

@@ -0,0 +1,170 @@
+/* $Id$ */
+
+#include "../stdafx.h"
+#include "../openttd.h"
+#include "win32_m.h"
+#include <windows.h>
+#include <mmsystem.h>
+
+static struct {
+	bool stop_song;
+	bool terminate;
+	bool playing;
+	int new_vol;
+	HANDLE wait_obj;
+	UINT_PTR devid;
+	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 MCIERROR 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)
+{
+	DWORD v = (vol * 65535 / 127);
+	midiOutSetVolume((HMIDIOUT)_midi.devid, 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)
+{
+	MIDIOUTCAPS midicaps;
+	DWORD threadId;
+	UINT nbdev;
+	UINT_PTR dev;
+	char buf[16];
+
+	mciSendStringA("capability sequencer has audio", buf, lengthof(buf), 0);
+	if (strcmp(buf, "true") != 0) return "MCI sequencer can't play audio";
+
+	memset(&_midi, 0, sizeof(_midi));
+	_midi.new_vol = -1;
+
+	/* Get midi device */
+	_midi.devid = MIDI_MAPPER;
+	for (dev = 0, nbdev = midiOutGetNumDevs(); dev < nbdev; dev++) {
+		if (midiOutGetDevCaps(dev, &midicaps, sizeof(midicaps)) == 0 && (midicaps.dwSupport & MIDICAPS_VOLUME)) {
+			_midi.devid = dev;
+			break;
+		}
+	}
+
+	if (CreateThread(NULL, 8192, MidiThread, 0, 0, &threadId) == NULL)
+		return "Failed to create thread";
+
+	return NULL;
+}
+
+static void Win32MidiStop(void)
+{
+	_midi.terminate = true;
+	SetEvent(_midi.wait_obj);
+}
+
+const HalMusicDriver _win32_music_driver = {
+	Win32MidiStart,
+	Win32MidiStop,
+	Win32MidiPlaySong,
+	Win32MidiStopSong,
+	Win32MidiIsSongPlaying,
+	Win32MidiSetVolume,
+};