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-- $Date: 2004/03/08 11:05:10 $
-- $Revision: 1.7 $
-- $Author: jcrocholl $
-- $Hash: 5fa170167eea6e538032a3a32865b0a4 $
-- This file was automatically created with ado.php.
-- Manual changes will be lost when it is updated.
package body Pitches is
-- Constructor for instances.
function Create
(Step : in Step_Enum; -- The initial step.
Alter : in Integer; -- The initial alter.
Octave : in Integer) -- The initial octave.
return Pitch_Access -- The newly created pitch.
is
Result : Pitch_Access := new Pitch;
begin
Result.Step := Step;
Result.Alter := Alter;
Result.Octave := Octave;
return Result;
end Create;
-- Accessor to read the step of a pitch.
function Get_Step
(This : access Pitch) -- The pitch to read from.
return Step_Enum is -- The step of that pitch.
begin
return This.Step;
end Get_Step;
-- Accessor to read the alter of a pitch.
function Get_Alter
(This : access Pitch) -- The pitch to read from.
return Integer is -- The alter of that pitch.
begin
return This.Alter;
end Get_Alter;
-- Accessor to read the octave of a pitch.
function Get_Octave
(This : access Pitch) -- The pitch to read from.
return Integer is -- The octave of that pitch.
begin
return This.Octave;
end Get_Octave;
-- Return the pitch position relative to middle C.
function Get_Position
(This : access Pitch) -- The pitch object instance.
return Integer is -- Up or down from middle C.
begin
case This.Step is
when C => return (This.Octave - 4) * 7;
when D => return (This.Octave - 4) * 7 + 1;
when E => return (This.Octave - 4) * 7 + 2;
when F => return (This.Octave - 4) * 7 + 3;
when G => return (This.Octave - 4) * 7 + 4;
when A => return (This.Octave - 4) * 7 + 5;
when B => return (This.Octave - 4) * 7 + 6;
end case;
end Get_Position;
end Pitches;