MidiSuspend

BOOL WINAPI MidiSuspend
(
	HANDLE hSequence, 
	BOOL Synchronize
);

This function suspends a playback operation, if there is one, to let the sequence to be altered then resumed normally.

Parameters

• hSequence: handle of the sequence to be suspended.
• Synchronize: indicates whether the sequence will resume playback from the exact time when it has stopped or the sequence position will continue to advance even suspended.

Return values

TRUE if the sequence was suspended or FALSE if not. The most likely reason for an error is an invalid sequence handle.

Remarks

MidiSuspend does not silence the sequence. If you want the sequence to be silenced, call MidiSilence. After you have done all alterations to the sequence, call MidiResume to restore playback or to enable it again. Do not use MidiSuspend in situations where MidiPause would be more adequate.

The example below adds a tempo change to a sequence.

Example

HANDLE Sequence;
BRELS_MIDI_EVENT Event;

// Opens the sequence
MidiOpen("test1.mid", DEFAULT_DEVICE, &Sequence);

// Plays
MidiPlay(Sequence);

// Waits 4 seconds
while (MidiGet(Sequence, CURRENT_TIME)<4000000) continue;

// Doubles speed
MidiSuspend(Sequence, FALSE);
Event.wTag = 0;
Event.dwTicks = MidiGet(Sequence, CURRENT_TICKS) + 1;
Event.Event = 0x51; // Tempo
Event.DataSize = 3;
Event.lpData = "\x03\xD0\x90"; // 0x03D090 == 250,000 (240 bpm)
MidiInsertTrackEvents(Sequence, 0, 1, &Event);
MidiResume(Sequence, FALSE);

// Waits the end of the sequence
while (MidiGet(Sequence, CURRENT_TICKS)) continue;

// Finishes
MidiClose(Sequence);

Further information

Released in November 19th, 2003
Updated in April 29th, 2004
Property of Breno de Lima Sarmento
Home page: http://www27.brinkster.com/brels
E-mail: [email protected]
ICQ: 78977999 ()