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/* $Id$ */
/** @file win32_m.cpp Music playback for Windows. */
#include "../stdafx.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;
HANDLE thread;
UINT_PTR devid;
char start_song[MAX_PATH];
} _midi;
static FMusicDriver_Win32 iFMusicDriver_Win32;
void MusicDriver_Win32::PlaySong(const char *filename)
{
assert(filename != NULL);
strcpy(_midi.start_song, filename);
_midi.playing = true;
_midi.stop_song = false;
SetEvent(_midi.wait_obj);
}
void MusicDriver_Win32::StopSong()
{
if (_midi.playing) {
_midi.stop_song = true;
_midi.start_song[0] = '\0';
SetEvent(_midi.wait_obj);
}
}
bool MusicDriver_Win32::IsSongPlaying()
{
return _midi.playing;
}
void MusicDriver_Win32::SetVolume(byte vol)
{
_midi.new_vol = vol;
SetEvent(_midi.wait_obj);
}
static MCIERROR CDECL MidiSendCommand(const TCHAR* cmd, ...)
{
va_list va;
TCHAR buf[512];
va_start(va, cmd);
_vsntprintf(buf, lengthof(buf), cmd, va);
va_end(va);
return mciSendString(buf, NULL, 0, 0);
}
static bool MidiIntPlaySong(const char *filename)
{
MidiSendCommand(_T("close all"));
if (MidiSendCommand(_T("open \"%s\" type sequencer alias song"), OTTD2FS(filename)) != 0) {
/* Let's try the "short name" */
TCHAR buf[MAX_PATH];
if (GetShortPathName(OTTD2FS(filename), buf, MAX_PATH) == 0) return false;
if (MidiSendCommand(_T("open \"%s\" type sequencer alias song"), buf) != 0) return false;
}
return MidiSendCommand(_T("play song from 0")) == 0;
}
static void MidiIntStopSong()
{
MidiSendCommand(_T("close all"));
}
static void MidiIntSetVolume(int vol)
{
DWORD v = (vol * 65535 / 127);
midiOutSetVolume((HMIDIOUT)_midi.devid, v + (v << 16));
}
static bool MidiIntIsSongPlaying()
{
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)
{
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) WaitForMultipleObjects(1, &_midi.wait_obj, FALSE, 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);
MidiIntStopSong();
return 0;
}
const char *MusicDriver_Win32::Start(const char * const *parm)
{
MIDIOUTCAPS midicaps;
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 (NULL == (_midi.wait_obj = CreateEvent(NULL, FALSE, FALSE, NULL))) return "Failed to create event";
/* The lpThreadId parameter of CreateThread (the last parameter)
* may NOT be NULL on Windows 95, 98 and ME. */
DWORD threadId;
if (NULL == (_midi.thread = CreateThread(NULL, 8192, MidiThread, 0, 0, &threadId))) return "Failed to create thread";
return NULL;
}
void MusicDriver_Win32::Stop()
{
_midi.terminate = true;
SetEvent(_midi.wait_obj);
WaitForMultipleObjects(1, &_midi.thread, true, INFINITE);
CloseHandle(_midi.wait_obj);
CloseHandle(_midi.thread);
}
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