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/* $Id$ */
#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;
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);
vsnprintf(buf, lengthof(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;
return MidiSendCommand("play song from 0") == 0;
}
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,
};
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