/// <summary>
/// Seeks the specified position in the track.
/// </summary>
/// <param name="position">
/// The position in ticks to seek.
/// </param>
public void Seek(int position)
{
// Enforce preconditions.
if (position < 0)
{
throw new ArgumentOutOfRangeException("position", position,
"Position out of range.");
}
enumerator = trk.GetEnumerator();
enumerator.MoveNext();
currentEvent = (MidiEvent)enumerator.Current;
endReached = false;
// Tick accumulator.
int ticks = currentEvent.Ticks;
// Create MIDI chaser to chase MIDI messages so that the sequence
// is updated correctly at the specified position.
MidiChaser chaser = new MidiChaser(this._midiSender, tickGen);
if (ticks <= position)
{
// Add first message.
chaser.Add(currentEvent.Message);
}
// While the position being sought has not been reached.
while (ticks < position)
{
// Move to the next event in the track.
endReached = !enumerator.MoveNext();
// If the position being sought lies beyond the end of the
// track, trigger event to notify listeners and return.
if (endReached)
{
if (EndOfTrackReached != null)
{
EndOfTrackReached(this, EventArgs.Empty);
}
// Chase MIDI messages so that the sequence sounds correctly from
// the specified position.
chaser.Chase();
return;
}
// Else the position has not yet been reached.
else
{
// Get the current MIDI event.
currentEvent = (MidiEvent)enumerator.Current;
// Accumulate ticks.
ticks += currentEvent.Ticks;
// If we haven't gone beyond the specified position.
if (ticks <= position)
{
// Add message to chaser.
chaser.Add(currentEvent.Message);
}
}
}
// Initialize the current MIDI event ticks to the number of ticks
// remaining until the specified position is reached.
currentEvent.Ticks = ticks - position;
// Chase MIDI messages so that the sequence sounds correctly from
// the specified position.
chaser.Chase();
}
/// <summary>
/// Seeks the specified position in the track.
/// </summary>
/// <param name="position">
/// The position in ticks to seek.
/// </param>
public void Seek(int position)
{
// Enforce preconditions.
if(position < 0)
throw new ArgumentOutOfRangeException("position", position,
"Position out of range.");
enumerator = trk.GetEnumerator();
enumerator.MoveNext();
currentEvent = (MidiEvent)enumerator.Current;
endReached = false;
// Tick accumulator.
int ticks = currentEvent.Ticks;
// Create MIDI chaser to chase MIDI messages so that the sequence
// is updated correctly at the specified position.
MidiChaser chaser = new MidiChaser(this._midiSender, tickGen);
if(ticks <= position)
{
// Add first message.
chaser.Add(currentEvent.Message);
}
// While the position being sought has not been reached.
while(ticks < position)
{
// Move to the next event in the track.
endReached = !enumerator.MoveNext();
// If the position being sought lies beyond the end of the
// track, trigger event to notify listeners and return.
if(endReached)
{
if(EndOfTrackReached != null)
EndOfTrackReached(this, EventArgs.Empty);
// Chase MIDI messages so that the sequence sounds correctly from
// the specified position.
chaser.Chase();
return;
}
// Else the position has not yet been reached.
else
{
// Get the current MIDI event.
currentEvent = (MidiEvent)enumerator.Current;
// Accumulate ticks.
ticks += currentEvent.Ticks;
// If we haven't gone beyond the specified position.
if(ticks <= position)
{
// Add message to chaser.
chaser.Add(currentEvent.Message);
}
}
}
// Initialize the current MIDI event ticks to the number of ticks
// remaining until the specified position is reached.
currentEvent.Ticks = ticks - position;
// Chase MIDI messages so that the sequence sounds correctly from
// the specified position.
chaser.Chase();
}
