{========================================================================}
{=                (c) 1995-98 SwiftSoft Ronald Dittrich                 =}
{========================================================================}
{=                          All Rights Reserved                         =}
{========================================================================}
{=  D 01099 Dresden             = Fax.: +49 (0)351-8037944              =}
{=  Loewenstr.7a                = info@swiftsoft.de                     =}
{========================================================================}
{=  Actual versions on http://www.swiftsoft.de/mmtools.html             =}
{========================================================================}
{=  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: 14.04.98 - 13:59:29 $                                        =}
{========================================================================}
unit MMMPEG;

{$I COMPILER.INC}

{$DEFINE USEMPEGDLL}

interface

uses
  Windows,
  SysUtils,
  Classes,
  Dialogs,
  Consts,
  DsgnIntf,
  MMSystem,
  MMObj,
  MMDSPObj,
  MMRegs,
  MMUtils,
  MMString,
  MMPCMSup,
  MMMPType
  {$IFNDEF USEMPEGDLL}
  ,Wrapper
  {$ENDIF}
  ;

type
  EMMMpegError = class(Exception);

  {-- TMMMpeg -----------------------------------------------------------------}
  TMMMpeg = class(TMMObject)
  public
    constructor Create; virtual;
    destructor Destroy; override;

    procedure FreeMpeg;
    procedure Assign(Source: TPersistent); override;
    procedure LoadFromFile(const AFilename: string);
    property  Empty: Boolean read GetEmpty;
    property  Done: Boolean read GetDone;
    property  TimePerFrame: Longint read GetTimePerFrame;
    property  Position: Longint read GetPosition write SetPosition;

    property  PWaveFormat: PWaveFormatEx read GetPWaveFormat;

    procedure OpenFile;
    procedure ResetFile;
    procedure CloseFile;
    function  ReadDataBytes(Buffer: PChar; NumBytes: Longint): Longint;

  published
    property OnChange: TNotifyEvent read FOnChange write FOnChange;

    property TrailingHeader: Longint read FTrailing write SetTrailingHeader;
    property FileName: TFileName read GetFileName write SetFileName;
    property Version: TMpegVersion read GetVersion write SetVersion;
    property Layer: integer read GetLayer write SetLayer;
    property Mode: TSampleMode read GetMode write SetMode;
    property BitRate: integer read GetBitRate write SetBitRate;
    property SampleRate: Longint read GetSampleRate write SetLongint;
    property PlayBackRate: Longint read GetPlayBackRate write SetLongint;
    property Frames: Longint read GetFrames write SetLongint;
    property Time: Longint read GetTime write SetLongint;
    property ChannelMode: TChannelMode read GetChannelMode write SetChannelMode;
  end;

  {-- TMMMpegFile -------------------------------------------------------}
  TMMMPEGFile = class(TMMDSPComponent)
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;

    procedure SetDecodeCallback(Callback: TMpegDecodeProc);

    procedure FreeMpeg;
    procedure Assign(Source: TPersistent); override;
    procedure LoadFromFile(const AFilename: string);
    property  Empty: Boolean read GetEmpty;
    property  TimePerFrame: Longint read GetTimePerFrame;
    property  Position: Longint read GetPosition write SetPosition;

    procedure OpenFile;
    procedure CloseFile;
    function  ReadDataBytes(Buffer: PChar; NumBytes: Longint): Longint;

  published
    property OnChange: TNotifyEvent read FOnChange write FOnChange;

    property Output;
    property Enabled: Boolean read FEnabled write FEnabled default True;
    property TrailingHeader: Longint read GetTrailingHeader write SetTrailingHeader;
    property FileName: TFileName read GetFileName write SetFileName;
    property Version: TMpegVersion read GetVersion write SetVersion;
    property Layer: integer read GetLayer write SetLayer;
    property Mode: TSampleMode read GetMode write SetMode;
    property BitRate: integer read GetBitRate write SetBitRate;
    property SampleRate: Longint read GetSampleRate write SetLongint;
    property PlayBackRate: Longint read GetPlayBackRate write SetLongint;
    property Frames: Longint read GetFrames write SetLongint;
    property Time: Longint read GetTime write SetLongint;
    property ChannelMode: TChannelMode read GetChannelMode write SetChannelMode;
  end;

function  IsMpegFile(aFileName: TFileName): Boolean;
function  GetMpegFileInfo(aFileName: TFileName; var Info: TMpegFileInfo): Boolean;

implementation