157 lines
2.9 KiB
C
157 lines
2.9 KiB
C
/* $Id$ */
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#include "../stdafx.h"
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#include "../openttd.h"
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#include "win32_m.h"
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#include <windows.h>
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#include <mmsystem.h>
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static struct {
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bool stop_song;
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bool terminate;
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bool playing;
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int new_vol;
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HANDLE wait_obj;
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char start_song[260];
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} _midi;
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static void Win32MidiPlaySong(const char *filename)
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{
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strcpy(_midi.start_song, filename);
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_midi.playing = true;
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_midi.stop_song = false;
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SetEvent(_midi.wait_obj);
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}
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static void Win32MidiStopSong(void)
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{
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if (_midi.playing) {
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_midi.stop_song = true;
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_midi.start_song[0] = '\0';
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SetEvent(_midi.wait_obj);
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}
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}
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static bool Win32MidiIsSongPlaying(void)
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{
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return _midi.playing;
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}
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static void Win32MidiSetVolume(byte vol)
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{
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_midi.new_vol = vol;
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SetEvent(_midi.wait_obj);
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}
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static long CDECL MidiSendCommand(const char *cmd, ...) {
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va_list va;
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char buf[512];
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va_start(va, cmd);
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vsprintf(buf, cmd, va);
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va_end(va);
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return mciSendStringA(buf, NULL, 0, 0);
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}
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static bool MidiIntPlaySong(const char *filename)
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{
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MidiSendCommand("close all");
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if (MidiSendCommand("open \"%s\" type sequencer alias song", filename) != 0)
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return false;
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if (MidiSendCommand("play song from 0") != 0)
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return false;
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return true;
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}
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static void MidiIntStopSong(void)
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{
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MidiSendCommand("close all");
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}
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static void MidiIntSetVolume(int vol)
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{
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uint v = (vol * 65535 / 127);
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midiOutSetVolume((HMIDIOUT)-1, v + (v << 16));
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}
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static bool MidiIntIsSongPlaying(void)
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{
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char buf[16];
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mciSendStringA("status song mode", buf, sizeof(buf), 0);
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return strcmp(buf, "playing") == 0 || strcmp(buf, "seeking") == 0;
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}
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static DWORD WINAPI MidiThread(LPVOID arg)
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{
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_midi.wait_obj = CreateEvent(NULL, FALSE, FALSE, NULL);
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do {
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char *s;
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int vol;
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vol = _midi.new_vol;
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if (vol != -1) {
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_midi.new_vol = -1;
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MidiIntSetVolume(vol);
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}
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s = _midi.start_song;
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if (s[0] != '\0') {
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_midi.playing = MidiIntPlaySong(s);
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s[0] = '\0';
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// Delay somewhat in case we don't manage to play.
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if (!_midi.playing) {
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Sleep(5000);
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}
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}
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if (_midi.stop_song && _midi.playing) {
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_midi.stop_song = false;
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_midi.playing = false;
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MidiIntStopSong();
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}
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if (_midi.playing && !MidiIntIsSongPlaying())
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_midi.playing = false;
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WaitForMultipleObjects(1, &_midi.wait_obj, FALSE, 1000);
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} while (!_midi.terminate);
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DeleteObject(_midi.wait_obj);
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return 0;
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}
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static const char *Win32MidiStart(const char * const *parm)
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{
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DWORD threadId;
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char buf[16];
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mciSendStringA("capability sequencer has audio", buf, lengthof(buf), 0);
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if (strcmp(buf, "true") != 0) return "MCI sequencer can't play audio";
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memset(&_midi, 0, sizeof(_midi));
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_midi.new_vol = -1;
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if (CreateThread(NULL, 8192, MidiThread, 0, 0, &threadId) == NULL)
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return "Failed to create thread";
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return NULL;
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}
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static void Win32MidiStop(void)
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{
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_midi.terminate = true;
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SetEvent(_midi.wait_obj);
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}
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const HalMusicDriver _win32_music_driver = {
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Win32MidiStart,
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Win32MidiStop,
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Win32MidiPlaySong,
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Win32MidiStopSong,
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Win32MidiIsSongPlaying,
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Win32MidiSetVolume,
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};
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