/// <summary>
/// Initializes a new instance of the SongPositionPointer class with
/// the specified system common message and pulses per quarter note.
/// </summary>
/// <param name="ppqn">
/// Pulses per quarter note resolution.
/// </param>
/// <param name="message">
/// The system common message to use for initialization.
/// </param>
/// <exception cref="ArgumentException">
/// If the specified message is not a song position pointer message or
/// the pulses per quarter note value is invalid.
/// </exception>
public SongPositionPointer(int ppqn, SysCommonMessage message)
{
// Enforce preconditions.
if (ppqn < TickGenerator.PpqnMin ||
ppqn % TickGenerator.PpqnMin != 0)
{
throw new ArgumentException(
"Pulses per quarter note invalid value.", "ppqn");
}
else if (message.Type != SysCommonType.SongPositionPointer)
{
throw new ArgumentException(
"Not song position pointer message.", "message");
}
this.message = (SysCommonMessage)message.Clone();
tickScale = ppqn / TickGenerator.PpqnMin;
}
/// <summary>
/// Initializes a new instance of the SongPositionPointer class with
/// the specified system common message and pulses per quarter note.
/// </summary>
/// <param name="ppqn">
/// Pulses per quarter note resolution.
/// </param>
/// <param name="message">
/// The system common message to use for initialization.
/// </param>
/// <exception cref="ArgumentException">
/// If the specified message is not a song position pointer message or
/// the pulses per quarter note value is invalid.
/// </exception>
public SongPositionPointer(int ppqn, SysCommonMessage message)
{
// Enforce preconditions.
if(ppqn < TickGenerator.PpqnMin ||
ppqn % TickGenerator.PpqnMin != 0)
throw new ArgumentException(
"Pulses per quarter note invalid value.", "ppqn");
else if(message.Type != SysCommonType.SongPositionPointer)
throw new ArgumentException(
"Not song position pointer message.", "message");
this.message = (SysCommonMessage)message.Clone();
tickScale = ppqn / TickGenerator.PpqnMin;
}
/// <summary>
/// Returns a clone of the adapted song position pointer message.
/// </summary>
/// <returns>
/// A clone of the adapted song position pointer message.
/// </returns>
public SysCommonMessage ToMessage()
{
return((SysCommonMessage)message.Clone());
}