win32_m.cpp
00001
00002
00003 #include "../stdafx.h"
00004 #include "win32_m.h"
00005 #include <windows.h>
00006 #include <mmsystem.h>
00007
00008 static struct {
00009 bool stop_song;
00010 bool terminate;
00011 bool playing;
00012 int new_vol;
00013 HANDLE wait_obj;
00014 HANDLE thread;
00015 UINT_PTR devid;
00016 char start_song[MAX_PATH];
00017 } _midi;
00018
00019 static FMusicDriver_Win32 iFMusicDriver_Win32;
00020
00021 void MusicDriver_Win32::PlaySong(const char *filename)
00022 {
00023 strcpy(_midi.start_song, filename);
00024 _midi.playing = true;
00025 _midi.stop_song = false;
00026 SetEvent(_midi.wait_obj);
00027 }
00028
00029 void MusicDriver_Win32::StopSong()
00030 {
00031 if (_midi.playing) {
00032 _midi.stop_song = true;
00033 _midi.start_song[0] = '\0';
00034 SetEvent(_midi.wait_obj);
00035 }
00036 }
00037
00038 bool MusicDriver_Win32::IsSongPlaying()
00039 {
00040 return _midi.playing;
00041 }
00042
00043 void MusicDriver_Win32::SetVolume(byte vol)
00044 {
00045 _midi.new_vol = vol;
00046 SetEvent(_midi.wait_obj);
00047 }
00048
00049 static MCIERROR CDECL MidiSendCommand(const TCHAR* cmd, ...)
00050 {
00051 va_list va;
00052 TCHAR buf[512];
00053
00054 va_start(va, cmd);
00055 _vsntprintf(buf, lengthof(buf), cmd, va);
00056 va_end(va);
00057 return mciSendString(buf, NULL, 0, 0);
00058 }
00059
00060 static bool MidiIntPlaySong(const char *filename)
00061 {
00062 MidiSendCommand(_T("close all"));
00063
00064 if (MidiSendCommand(_T("open \"%s\" type sequencer alias song"), OTTD2FS(filename)) != 0) {
00065
00066 TCHAR buf[MAX_PATH];
00067 if (GetShortPathName(OTTD2FS(filename), buf, MAX_PATH) == 0) return false;
00068 if (MidiSendCommand(_T("open \"%s\" type sequencer alias song"), buf) != 0) return false;
00069 }
00070
00071 return MidiSendCommand(_T("play song from 0")) == 0;
00072 }
00073
00074 static void MidiIntStopSong()
00075 {
00076 MidiSendCommand(_T("close all"));
00077 }
00078
00079 static void MidiIntSetVolume(int vol)
00080 {
00081 DWORD v = (vol * 65535 / 127);
00082 midiOutSetVolume((HMIDIOUT)_midi.devid, v + (v << 16));
00083 }
00084
00085 static bool MidiIntIsSongPlaying()
00086 {
00087 char buf[16];
00088 mciSendStringA("status song mode", buf, sizeof(buf), 0);
00089 return strcmp(buf, "playing") == 0 || strcmp(buf, "seeking") == 0;
00090 }
00091
00092 static DWORD WINAPI MidiThread(LPVOID arg)
00093 {
00094 do {
00095 char *s;
00096 int vol;
00097
00098 vol = _midi.new_vol;
00099 if (vol != -1) {
00100 _midi.new_vol = -1;
00101 MidiIntSetVolume(vol);
00102 }
00103
00104 s = _midi.start_song;
00105 if (s[0] != '\0') {
00106 _midi.playing = MidiIntPlaySong(s);
00107 s[0] = '\0';
00108
00109
00110 if (!_midi.playing) WaitForMultipleObjects(1, &_midi.wait_obj, FALSE, 5000);
00111 }
00112
00113 if (_midi.stop_song && _midi.playing) {
00114 _midi.stop_song = false;
00115 _midi.playing = false;
00116 MidiIntStopSong();
00117 }
00118
00119 if (_midi.playing && !MidiIntIsSongPlaying()) _midi.playing = false;
00120
00121 WaitForMultipleObjects(1, &_midi.wait_obj, FALSE, 1000);
00122 } while (!_midi.terminate);
00123
00124 MidiIntStopSong();
00125 return 0;
00126 }
00127
00128 const char *MusicDriver_Win32::Start(const char * const *parm)
00129 {
00130 MIDIOUTCAPS midicaps;
00131 UINT nbdev;
00132 UINT_PTR dev;
00133 char buf[16];
00134
00135 mciSendStringA("capability sequencer has audio", buf, lengthof(buf), 0);
00136 if (strcmp(buf, "true") != 0) return "MCI sequencer can't play audio";
00137
00138 memset(&_midi, 0, sizeof(_midi));
00139 _midi.new_vol = -1;
00140
00141
00142 _midi.devid = MIDI_MAPPER;
00143 for (dev = 0, nbdev = midiOutGetNumDevs(); dev < nbdev; dev++) {
00144 if (midiOutGetDevCaps(dev, &midicaps, sizeof(midicaps)) == 0 && (midicaps.dwSupport & MIDICAPS_VOLUME)) {
00145 _midi.devid = dev;
00146 break;
00147 }
00148 }
00149
00150 if (NULL == (_midi.wait_obj = CreateEvent(NULL, FALSE, FALSE, NULL))) return "Failed to create event";
00151
00152
00153
00154 DWORD threadId;
00155 if (NULL == (_midi.thread = CreateThread(NULL, 8192, MidiThread, 0, 0, &threadId))) return "Failed to create thread";
00156
00157 return NULL;
00158 }
00159
00160 void MusicDriver_Win32::Stop()
00161 {
00162 _midi.terminate = true;
00163 SetEvent(_midi.wait_obj);
00164 WaitForMultipleObjects(1, &_midi.thread, true, INFINITE);
00165 CloseHandle(_midi.wait_obj);
00166 CloseHandle(_midi.thread);
00167 }