unit main_mt;

{$mode objfpc}{$H+}

interface

uses
  SysUtils,
  Forms,
  StdCtrls,
  Buttons,
  uos_flat,
  Classes;

type

  { TForm1 }

  TForm1 = class(TForm)
    BitBtnPlay: TBitBtn;
    ButtonQuit: TButton;
    interchar: TEdit;
    interspace: TEdit;
    Label1: TLabel;
    Label2: TLabel;
    Label3: TLabel;
    Memo1: TMemo;

    procedure BitBtnPlayClick(Sender: TObject);
    procedure ButtonQuitClick(Sender: TObject);
    procedure FormActivate(Sender: TObject);
    procedure FormDestroy(Sender: TObject);
    procedure CreateMorsePlayer();

  private
    { private declarations }
  public
    { public declarations }
  end;

var
  Form1: TForm1;
  i: cardinal;
  ordir: string;

implementation

{$R *.lfm}


procedure TForm1.CreateMorsePlayer();
var
  filetoplay, fileerror: string;
  chara: string;
  player: cardinal;
begin
  if i <= length(Memo1.Text) then
  begin
    chara := copy(Memo1.Text, i, 1);

    fileerror := ordir + 'sound' + directoryseparator + 'morse_audio' + directoryseparator + '0.mp3';

    if odd(i) then
      player := 0
    else
      player := 1;  ///// to switch between player1 <> player2

    if chara <> ' ' then
    begin
      uos_CreatePlayer(player);

        {$if defined(cpuarm) or defined(cpuaarch64)}  // need a lower latency
      uos_AddIntoDevOut(player, -1, 0.08, -1, -1, -1, -1, -1) ;
       {$else}
      uos_AddIntoDevOut(player);
       {$endif}

      filetoplay := ordir + 'sound' + directoryseparator + 'morse_audio' + directoryseparator + lowercase(chara) + '.mp3';

      if fileexists(PChar(filetoplay)) then
        uos_AddFromFile(player, PChar(filetoplay))
      else
        uos_AddFromFile(player, PChar(fileerror));  /// if not existing char
      if length(Memo1.Text) > i then
        uos_EndProc(player, @CreateMorsePlayer);        /// assign EndProc
      sleep(StrToInt(interchar.Text));     ///// the pause between each character
      uos_Play(player);
      Inc(i);
    end
    else
    begin
      sleep(StrToInt(interspace.Text));   ///// the pause if space character
      Inc(i);
      if length(Memo1.Text) >= i then
        CreateMorsePlayer;
    end;

  end;
end;

procedure TForm1.BitBtnPlayClick(Sender: TObject);
var
  charac: string;
begin
  if Memo1.Text <> '' then
  begin
    i := 1;
    CreateMorsePlayer();
  end;

end;

procedure TForm1.ButtonQuitClick(Sender: TObject);
begin
  Close;
end;

procedure TForm1.FormActivate(Sender: TObject);
var
  PA_FileName, MP_FileName: string;
begin
  memo1.Text := '';
  ordir      := IncludeTrailingBackslash(ExtractFilePath(ParamStr(0)));
  
  {$IFDEF Windows}
     {$if defined(cpu64)}
     PA_FileName := ordir + 'lib\Windows\64bit\LibPortaudio-64.dll';
     MP_FileName := ordir + 'lib\Windows\64bit\LibMpg123-64.dll';
   {$else}
    PA_FileName := ordir + 'lib\Windows\32bit\LibPortaudio-32.dll';
   MP_FileName := ordir + 'lib\Windows\32bit\LibMpg123-32.dll';
   {$endif}
   {$ENDIF}

   {$if defined(CPUAMD64) and defined(openbsd) }
   PA_FileName := ordir + 'lib/OpenBSD/64bit/LibPortaudio-64.so';
   MP_FileName := ordir + 'lib/OpenBSD/64bit/LibMpg123-64.so';
   {$ENDIF}

     {$if defined(CPUAMD64) and defined(linux) }
   PA_FileName := ordir + 'lib/Linux/64bit/LibPortaudio-64.so';
   MP_FileName := ordir + 'lib/Linux/64bit/LibMpg123-64.so';
   {$ENDIF}
  {$if defined(cpu86) and defined(linux)}
   PA_FileName := ordir + 'lib/Linux/32bit/LibPortaudio-32.so';
   MP_FileName := ordir + 'lib/Linux/32bit/LibMpg123-32.so';
   {$endif}
    {$if defined(linux) and defined(cpuarm)}
  PA_FileName := ordir + 'lib/Linux/arm_raspberrypi/libportaudio-arm.so';
  MP_FileName := ordir + 'lib/Linux/arm_raspberrypi/libsndfile-arm.so';
   {$ENDIF}

    {$if defined(linux) and defined(cpuaarch64)}
  PA_FileName := ordir + 'lib/Linux/aarch64_raspberrypi/libportaudio_aarch64.so';
  MP_FileName := ordir + 'lib/Linux/aarch64_raspberrypi/libmpg123_aarch64.so';
   {$ENDIF}


  {$IFDEF freebsd}
    {$if defined(cpu64)}
   PA_FileName := ordir + 'lib/FreeBSD/64bit/libportaudio-64.so';
   MP_FileName := ordir + 'lib/FreeBSD/64bit/libmpg123-64.so';
   {$else}
   PA_FileName := ordir + 'lib/FreeBSD/32bit/libportaudio-32.so';
   MP_FileName := ordir + 'lib/FreeBSD/32bit/libmpg123-32.so';
   {$endif}
   {$ENDIF}

  uos_LoadLib(PChar(PA_FileName), nil, PChar(MP_FileName), nil, nil, nil, nil);

end;

procedure TForm1.FormDestroy(Sender: TObject);
begin
  uos_free;    /// for release dynamic loaded libraries
end;

end.