12 #include "../stdafx.h" 13 #include "../string_func.h" 17 #include "../os/windows/win32.h" 19 #include "midifile.hpp" 21 #include "../base_media_base.h" 23 #include "../safeguards.h" 56 static byte ScaleVolume(byte original, byte scale)
58 return original * scale / 127;
62 void CALLBACK MidiOutProc(HMIDIOUT hmo, UINT wMsg, DWORD_PTR dwInstance, DWORD_PTR dwParam1, DWORD_PTR dwParam2)
64 if (wMsg == MOM_DONE) {
65 MIDIHDR *hdr = (LPMIDIHDR)dwParam1;
66 midiOutUnprepareHeader(hmo, hdr,
sizeof(*hdr));
71 static void TransmitChannelMsg(byte status, byte p1, byte p2 = 0)
73 midiOutShortMsg(_midi.midi_out, status | (p1 << 8) | (p2 << 16));
76 static void TransmitSysex(
const byte *&msg_start,
size_t &remaining)
79 const byte *msg_end = msg_start;
80 while (*msg_end != MIDIST_ENDSYSEX) msg_end++;
84 MIDIHDR *hdr = CallocT<MIDIHDR>(1);
85 hdr->lpData = (LPSTR)msg_start;
86 hdr->dwBufferLength = msg_end - msg_start;
87 if (midiOutPrepareHeader(_midi.midi_out, hdr,
sizeof(*hdr)) == MMSYSERR_NOERROR) {
89 hdr->dwBytesRecorded = hdr->dwBufferLength;
90 midiOutLongMsg(_midi.midi_out, hdr,
sizeof(*hdr));
96 remaining -= msg_end - msg_start;
100 static void TransmitStandardSysex(MidiSysexMessage msg)
103 const byte *data = MidiGetStandardSysexMessage(msg, length);
104 TransmitSysex(data, length);
111 void CALLBACK
TimerCallback(UINT uTimerID, UINT, DWORD_PTR dwUser, DWORD_PTR, DWORD_PTR)
114 if (!TryEnterCriticalSection(&_midi.lock))
return;
118 DEBUG(driver, 2,
"Win32-MIDI: timer: do_stop is set");
119 midiOutReset(_midi.midi_out);
120 _midi.playing =
false;
121 _midi.do_stop =
false;
122 LeaveCriticalSection(&_midi.lock);
127 if (_midi.do_start != 0) {
129 if (timeGetTime() - _midi.playback_start_time < 50) {
130 LeaveCriticalSection(&_midi.lock);
133 DEBUG(driver, 2,
"Win32-MIDI: timer: do_start step %d", _midi.do_start);
135 if (_midi.do_start == 1) {
137 midiOutReset(_midi.midi_out);
138 _midi.playback_start_time = timeGetTime();
141 LeaveCriticalSection(&_midi.lock);
143 }
else if (_midi.do_start == 2) {
145 TransmitStandardSysex(MidiSysexMessage::ResetGM);
146 _midi.playback_start_time = timeGetTime();
149 LeaveCriticalSection(&_midi.lock);
151 }
else if (_midi.do_start == 3) {
153 TransmitStandardSysex(MidiSysexMessage::RolandSetReverb);
154 _midi.playback_start_time = timeGetTime();
157 LeaveCriticalSection(&_midi.lock);
159 }
else if (_midi.do_start == 4) {
161 _midi.current_file.MoveFrom(_midi.next_file);
162 std::swap(_midi.next_segment, _midi.current_segment);
163 _midi.current_segment.start_block = 0;
164 _midi.playback_start_time = timeGetTime();
165 _midi.playing =
true;
167 _midi.current_block = 0;
169 MemSetT<byte>(_midi.channel_volumes, 127,
lengthof(_midi.channel_volumes));
171 }
else if (!_midi.playing) {
173 DEBUG(driver, 2,
"Win32-MIDI: timer: not playing, stopping timer");
174 timeKillEvent(uTimerID);
176 LeaveCriticalSection(&_midi.lock);
181 static int volume_throttle = 0;
182 if (_midi.current_volume != _midi.new_volume) {
183 if (volume_throttle == 0) {
184 DEBUG(driver, 2,
"Win32-MIDI: timer: volume change");
185 _midi.current_volume = _midi.new_volume;
186 volume_throttle = 20 / _midi.time_period;
187 for (
int ch = 0; ch < 16; ch++) {
188 byte vol = ScaleVolume(_midi.channel_volumes[ch], _midi.current_volume);
189 TransmitChannelMsg(MIDIST_CONTROLLER | ch, MIDICT_CHANVOLUME, vol);
197 if (_midi.current_segment.start > 0 && _midi.current_block == 0 && _midi.current_segment.start_block == 0) {
201 uint preload_bytes = 0;
202 for (
size_t bl = 0; bl < _midi.current_file.blocks.size(); bl++) {
205 if (block.
ticktime >= _midi.current_segment.start) {
206 if (_midi.current_segment.loop) {
207 DEBUG(driver, 2,
"Win32-MIDI: timer: loop from block %d (ticktime %d, realtime %.3f, bytes %d)", (
int)bl, (
int)block.
ticktime, ((
int)block.
realtime)/1000.0, (
int)preload_bytes);
208 _midi.current_segment.start_block = bl;
216 DEBUG(driver, 2,
"Win32-MIDI: timer: start from block %d (ticktime %d, realtime %.3f, bytes %d)", (
int)bl, (
int)block.
ticktime, ((
int)block.
realtime) / 1000.0, (
int)preload_bytes);
217 _midi.playback_start_time -= block.
realtime / 1000 - (DWORD)(preload_bytes * 1000 / 3125);
226 DWORD current_time = timeGetTime();
227 DWORD playback_time = current_time - _midi.playback_start_time;
228 while (_midi.current_block < _midi.current_file.blocks.size()) {
232 if (_midi.current_segment.end > 0 && block.
ticktime >= _midi.current_segment.end) {
233 if (_midi.current_segment.loop) {
234 _midi.current_block = _midi.current_segment.start_block;
235 _midi.playback_start_time = timeGetTime() - _midi.current_file.blocks[_midi.current_block].realtime / 1000;
237 _midi.do_stop =
true;
242 if (block.
realtime / 1000 > playback_time) {
248 byte last_status = 0;
249 while (remaining > 0) {
252 byte status = data[0];
254 last_status = status;
258 status = last_status;
260 switch (status & 0xF0) {
262 case MIDIST_CHANPRESS:
264 TransmitChannelMsg(status, data[0]);
270 case MIDIST_POLYPRESS:
271 case MIDIST_PITCHBEND:
273 TransmitChannelMsg(status, data[0], data[1]);
277 case MIDIST_CONTROLLER:
279 if (data[0] == MIDICT_CHANVOLUME) {
281 _midi.channel_volumes[status & 0x0F] = data[1];
282 int vol = ScaleVolume(data[1], _midi.current_volume);
283 TransmitChannelMsg(status, data[0], vol);
286 TransmitChannelMsg(status, data[0], data[1]);
295 TransmitSysex(data, remaining);
297 case MIDIST_TC_QFRAME:
302 case MIDIST_SONGPOSPTR:
313 _midi.current_block++;
317 if (_midi.current_block == _midi.current_file.blocks.size()) {
318 if (_midi.current_segment.loop) {
319 _midi.current_block = _midi.current_segment.start_block;
320 _midi.playback_start_time = timeGetTime() - _midi.current_file.blocks[_midi.current_block].realtime / 1000;
322 _midi.do_stop =
true;
326 LeaveCriticalSection(&_midi.lock);
331 DEBUG(driver, 2,
"Win32-MIDI: PlaySong: entry");
334 if (!new_song.LoadSong(song))
return;
335 DEBUG(driver, 2,
"Win32-MIDI: PlaySong: Loaded song");
337 EnterCriticalSection(&_midi.lock);
339 _midi.next_file.MoveFrom(new_song);
342 _midi.next_segment.loop = song.
loop;
344 DEBUG(driver, 2,
"Win32-MIDI: PlaySong: setting flag");
345 _midi.do_stop = _midi.playing;
348 if (_midi.timer_id == 0) {
349 DEBUG(driver, 2,
"Win32-MIDI: PlaySong: starting timer");
350 _midi.timer_id = timeSetEvent(_midi.time_period, _midi.time_period,
TimerCallback, (DWORD_PTR)
this, TIME_PERIODIC | TIME_CALLBACK_FUNCTION);
353 LeaveCriticalSection(&_midi.lock);
358 DEBUG(driver, 2,
"Win32-MIDI: StopSong: entry");
359 EnterCriticalSection(&_midi.lock);
360 DEBUG(driver, 2,
"Win32-MIDI: StopSong: setting flag");
361 _midi.do_stop =
true;
362 LeaveCriticalSection(&_midi.lock);
367 return _midi.playing || (_midi.do_start != 0);
372 EnterCriticalSection(&_midi.lock);
373 _midi.new_volume = vol;
374 LeaveCriticalSection(&_midi.lock);
379 DEBUG(driver, 2,
"Win32-MIDI: Start: initializing");
381 InitializeCriticalSection(&_midi.lock);
393 resolution =
Clamp(resolution, 1, 20);
395 if (midiOutOpen(&_midi.midi_out, devid, (DWORD_PTR)&MidiOutProc, (DWORD_PTR)
this, CALLBACK_FUNCTION) != MMSYSERR_NOERROR) {
396 return "could not open midi device";
399 midiOutReset(_midi.midi_out);
403 if (timeGetDevCaps(&timecaps,
sizeof(timecaps)) == MMSYSERR_NOERROR) {
404 _midi.time_period =
min(
max((UINT)resolution, timecaps.wPeriodMin), timecaps.wPeriodMax);
405 if (timeBeginPeriod(_midi.time_period) == MMSYSERR_NOERROR) {
407 DEBUG(driver, 2,
"Win32-MIDI: Start: timer resolution is %d", (
int)_midi.time_period);
411 midiOutClose(_midi.midi_out);
412 return "could not set timer resolution";
417 EnterCriticalSection(&_midi.lock);
419 if (_midi.timer_id) {
420 timeKillEvent(_midi.timer_id);
424 timeEndPeriod(_midi.time_period);
425 midiOutReset(_midi.midi_out);
426 midiOutClose(_midi.midi_out);
428 LeaveCriticalSection(&_midi.lock);
429 DeleteCriticalSection(&_midi.lock);
int override_end
MIDI tick to end the song at (0 if no override)
Metadata about a music track.
void Stop()
Stop this driver.
Factory for Windows' music player.
MidiFile current_file
file currently being played from
CRITICAL_SECTION lock
synchronization for playback status fields
Base for Windows music playback.
SmallVector< byte, 8 > data
raw midi data contained in block
size_t current_block
next block index to send
int override_start
MIDI ticks to skip over in beginning.
bool playing
flag indicating that playback is active
const T * Begin() const
Get the pointer to the first item (const)
byte new_volume
volume setting to change to
static T max(const T a, const T b)
Returns the maximum of two values.
void PlaySong(const MusicSongInfo &song)
Play a particular song.
UINT timer_id
ID of active multimedia timer.
uint Length() const
Get the number of items in the list.
UINT time_period
obtained timer precision value
void CALLBACK TimerCallback(UINT uTimerID, UINT, DWORD_PTR dwUser, DWORD_PTR, DWORD_PTR)
Realtime MIDI playback service routine.
byte channel_volumes[16]
last seen volume controller values in raw data
bool do_stop
flag for stopping playback at next opportunity
#define lengthof(x)
Return the length of an fixed size array.
static T min(const T a, const T b)
Returns the minimum of two values.
const char * Start(const char *const *param)
Start this driver.
bool IsSongPlaying()
Are we currently playing a song?
uint32 realtime
real-time (microseconds) since start of file this block should be triggered at
HMIDIOUT midi_out
handle to open midiOut
MidiFile next_file
upcoming file to play
static T Clamp(const T a, const T min, const T max)
Clamp a value between an interval.
#define DEBUG(name, level,...)
Output a line of debugging information.
PlaybackSegment next_segment
segment info for upcoming file
byte current_volume
current effective volume setting
uint32 ticktime
tick number since start of file this block should be triggered at
bool loop
song should play in a tight loop if possible, never ending
PlaybackSegment current_segment
segment info for current playback
void SetVolume(byte vol)
Set the volume, if possible.
DWORD playback_start_time
timestamp current file began playback
static void free(const void *ptr)
Version of the standard free that accepts const pointers.
int GetDriverParamInt(const char *const *parm, const char *name, int def)
Get an integer parameter the list of parameters.
void StopSong()
Stop playing the current song.
int do_start
flag for starting playback of next_file at next opportunity