RealICQClient/Includes/2007_MMTools/Help/Doc/WAVE/MMFADE.INT

{========================================================================}
{=                (c) 1995-98 SwiftSoft Ronald Dittrich                 =}
{========================================================================}
{=                          All Rights Reserved                         =}
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{=  D 01099 Dresden             = Tel.: +0351-8012255                   =}
{=  Loewenstr.7a                = info@swiftsoft.de                     =}
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{=  Actual versions on http://www.swiftsoft.de/mmtools.html             =}
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{=  This code is for reference purposes only and may not be copied or   =}
{=  distributed in any format electronic or otherwise except one copy   =}
{=  for backup purposes.                                                =}
{=                                                                      =}
{=  No Delphi Component Kit or Component individually or in a collection=}
{=  subclassed or otherwise from the code in this unit, or associated   =}
{=  .pas, .dfm, .dcu, .asm or .obj files may be sold or distributed     =}
{=  without express permission from SwiftSoft.                          =}
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{=  For more licence informations please refer to the associated        =}
{=  HelpFile.                                                           =}
{========================================================================}
{=  $Date: 20.01.1998 - 18:00:00 $                                      =}
{========================================================================}
unit MMFade;

{$I COMPILER.INC}

interface

uses
{$IFDEF WIN32}
  Windows,
{$ELSE}
  WinProcs,
  WinTypes,
{$ENDIF}
  SysUtils,
  Messages,
  Classes,
  Controls,
  MMObj,
  MMutils,
  MMMulDiv,
  MMRegs,
  MMPCMSup;

const
    Overflow  : Boolean = False;
type
    PMMFadePoint = ^TMMFadePoint;
    TMMFadePoint = record
       Offset    : Longint;
       Volume    : Longint;
       VolumeL   : Longint;
       VolumeR   : Longint;
       Selected  : LongBool;
    end;

    PMMFadeSeg   = ^TMMFadeSeg;
    TMMFadeSeg   = record
       ptStart   : TMMFadePoint;
       ptEnd     : TMMFadePoint;
    end;

const
    { Maximum List size }
    MaxListSize   = Maxint div (sizeOf(TMMFadePoint)*sizeOf(TMMFadePoint));

type
    PMMFadeArray = ^TMMFadeArray;
    TMMFadeArray = array[0..MaxListSize-1] of TMMFadePoint;

    {-- TMMFadeList -----------------------------------------------------}
    TMMFadeList = class(TMMObject)
    public
        destructor  Destroy; override;

        procedure Clear;
        procedure Sort;

        function  Add(Point: TMMFadePoint): Integer;
        procedure Insert(Index: Integer; Point: TMMFadePoint);
        procedure Delete(Index: Integer);
        function  Selected(Index: Integer): Boolean;

        function  QueryFadePoint(Point: TMMFadePoint): Boolean;
        function  AddFadePoint(Point: TMMFadePoint; Align: Boolean): Boolean;
        function  LocateFadePoint(Offset: Longint): integer;
        function  FindFadePoint(Offset: Longint): integer;
        function  CalcFadeVolume(Offset: Longint): Longint;

        procedure Assign(Source: TPersistent); virtual;
        procedure AssignEnvelope(Source: TPersistent); virtual;
        procedure AssignToEnvelope(Dest: TPersistent); virtual;

        function  First: PMMFadePoint;
        function  Last: PMMFadePoint;
        function  Expand: TMMFadeList;
        property  Capacity: Integer read FCapacity write SetCapacity;
        property  Count: Integer read FCount write SetCount;
        property  Points[Index: Integer]: PMMFadePoint read Get write Put; default;
        property  List: PMMFadeArray read FList;

        property  CurIndex: Longint read FCurIndex write FCurIndex;
        property  StartOffset: Longint read FStartOffset write FStartOffset;
        property  StartVolumeL: Longint read FStartVolumeL write FStartVolumeL;
        property  StartVolumeR: Longint read FStartVolumeR write FStartVolumeR;
    end;

function pcmVolumeFade8(pwfx: PWaveFormatEx; lpData: PChar;
                        dwSrcLen: TDataSize; FadeList: TMMFadeList): Boolean;

function pcmVolumeFade16(pwfx: PWaveFormatEx; lpData: PChar;
                         dwSrcLen: TDataSize; FadeList: TMMFadeList): Boolean;

implementation