/// <summary>
/// Inserts an IMidiMessage at the specified position in absolute ticks.
/// </summary>
/// <param name="position">
/// The position in the Track in absolute ticks in which to insert the
/// IMidiMessage.
/// </param>
/// <param name="message">
/// The IMidiMessage to insert.
/// </param>
public void Insert(int position, IMidiMessage message)
{
#region Require
if (position < 0)
{
throw new ArgumentOutOfRangeException("position", position,
"IMidiMessage position out of range.");
}
else if (message == null)
{
throw new ArgumentNullException("message");
}
#endregion
MidiEvent newMidiEvent = new MidiEvent(this, position, message);
if (head == null)
{
head = newMidiEvent;
tail = newMidiEvent;
}
else if (position >= tail.AbsoluteTicks)
{
newMidiEvent.Previous = tail;
tail.Next = newMidiEvent;
tail = newMidiEvent;
endOfTrackMidiEvent.SetAbsoluteTicks(Length);
endOfTrackMidiEvent.Previous = tail;
}
else
{
MidiEvent current = head;
while (current.AbsoluteTicks < position)
{
current = current.Next;
}
newMidiEvent.Next = current;
newMidiEvent.Previous = current.Previous;
if (current.Previous != null)
{
current.Previous.Next = newMidiEvent;
}
else
{
head = newMidiEvent;
}
current.Previous = newMidiEvent;
}
count++;
#region Invariant
AssertValid();
#endregion
}
public Track()
{
endOfTrackMidiEvent = new MidiEvent(this, Length, MetaMessage.EndOfTrackMessage);
}
/// <summary>
/// Gets the MidiEvent at the specified index.
/// </summary>
/// <param name="index">
/// The index of the MidiEvent to get.
/// </param>
/// <returns>
/// The MidiEvent at the specified index.
/// </returns>
public MidiEvent GetMidiEvent(int index)
{
#region Require
if (index < 0 || index >= Count)
{
throw new ArgumentOutOfRangeException("index", index,
"Track index out of range.");
}
#endregion
MidiEvent result;
if (index == Count - 1)
{
result = endOfTrackMidiEvent;
}
else
{
if (index < Count / 2)
{
result = head;
for (int i = 0; i < index; i++)
{
result = result.Next;
}
}
else
{
result = tail;
for (int i = Count - 2; i > index; i--)
{
result = result.Previous;
}
}
}
#region Ensure
#if (DEBUG)
if (index == Count - 1)
{
Debug.Assert(result.AbsoluteTicks == Length);
Debug.Assert(result.MidiMessage == MetaMessage.EndOfTrackMessage);
}
else
{
MidiEvent t = head;
for (int i = 0; i < index; i++)
{
t = t.Next;
}
Debug.Assert(t == result);
}
#endif
#endregion
return(result);
}
public void Move(MidiEvent e, int newPosition)
{
#region Require
if (e.Owner != this)
{
throw new ArgumentException("MidiEvent does not belong to this Track.");
}
else if (newPosition < 0)
{
throw new ArgumentOutOfRangeException("newPosition");
}
else if (e == endOfTrackMidiEvent)
{
throw new InvalidOperationException(
"Cannot move end of track message. Use the EndOfTrackOffset property instead.");
}
#endregion
MidiEvent previous = e.Previous;
MidiEvent next = e.Next;
if (e.Previous != null && e.Previous.AbsoluteTicks > newPosition)
{
e.Previous.Next = e.Next;
if (e.Next != null)
{
e.Next.Previous = e.Previous;
}
while (previous != null && previous.AbsoluteTicks > newPosition)
{
next = previous;
previous = previous.Previous;
}
}
else if (e.Next != null && e.Next.AbsoluteTicks < newPosition)
{
e.Next.Previous = e.Previous;
if (e.Previous != null)
{
e.Previous.Next = e.Next;
}
while (next != null && next.AbsoluteTicks < newPosition)
{
previous = next;
next = next.Next;
}
}
if (previous != null)
{
previous.Next = e;
}
if (next != null)
{
next.Previous = e;
}
e.Previous = previous;
e.Next = next;
e.SetAbsoluteTicks(newPosition);
if (newPosition < head.AbsoluteTicks)
{
head = e;
}
if (newPosition > tail.AbsoluteTicks)
{
tail = e;
}
endOfTrackMidiEvent.SetAbsoluteTicks(Length);
endOfTrackMidiEvent.Previous = tail;
#region Invariant
AssertValid();
#endregion
}
/// <summary>
/// Merges the specified Track with the current Track.
/// </summary>
/// <param name="trk">
/// The Track to merge with.
/// </param>
public void Merge(Track trk)
{
#region Require
if (trk == null)
{
throw new ArgumentNullException("trk");
}
#endregion
#region Guard
if (trk == this)
{
return;
}
else if (trk.Count == 1)
{
return;
}
#endregion
#if (DEBUG)
int oldCount = Count;
#endif
count += trk.Count - 1;
MidiEvent a = head;
MidiEvent b = trk.head;
MidiEvent current = null;
Debug.Assert(b != null);
if (a != null && a.AbsoluteTicks <= b.AbsoluteTicks)
{
current = new MidiEvent(this, a.AbsoluteTicks, a.MidiMessage);
a = a.Next;
}
else
{
current = new MidiEvent(this, b.AbsoluteTicks, b.MidiMessage);
b = b.Next;
}
head = current;
while (a != null && b != null)
{
while (a != null && a.AbsoluteTicks <= b.AbsoluteTicks)
{
current.Next = new MidiEvent(this, a.AbsoluteTicks, a.MidiMessage);
current.Next.Previous = current;
current = current.Next;
a = a.Next;
}
if (a != null)
{
while (b != null && b.AbsoluteTicks <= a.AbsoluteTicks)
{
current.Next = new MidiEvent(this, b.AbsoluteTicks, b.MidiMessage);
current.Next.Previous = current;
current = current.Next;
b = b.Next;
}
}
}
while (a != null)
{
current.Next = new MidiEvent(this, a.AbsoluteTicks, a.MidiMessage);
current.Next.Previous = current;
current = current.Next;
a = a.Next;
}
while (b != null)
{
current.Next = new MidiEvent(this, b.AbsoluteTicks, b.MidiMessage);
current.Next.Previous = current;
current = current.Next;
b = b.Next;
}
tail = current;
endOfTrackMidiEvent.SetAbsoluteTicks(Length);
endOfTrackMidiEvent.Previous = tail;
#region Ensure
#if (DEBUG)
Debug.Assert(count == oldCount + trk.Count - 1);
#endif
#endregion
#region Invariant
AssertValid();
#endregion
}
