MP3 Info & Convert, Version 1.0a

{
  micmain.pas

  This file is part of "Flocke's MP3 Info & Convert".

  Version 1.0a - Always find the most current version at
  http://flocke.vssd.de/prog/apps/pascal/mp3conv/

  Copyright (C) 2005 Volker Siebert, Germany
  All rights reserved.

  Permission is hereby granted, free of charge, to any person obtaining a
  copy of this software and associated documentation files (the "Software"),
  to deal in the Software without restriction, including without limitation
  the rights to use, copy, modify, merge, publish, distribute, sublicense,
  and/or sell copies of the Software, and to permit persons to whom the
  Software is furnished to do so, subject to the following conditions:

  The above copyright notice and this permission notice shall be included in
  all copies or substantial portions of the Software.

  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  DEALINGS IN THE SOFTWARE.
}

unit micmain;

interface

uses
  Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls, ExtCtrls, DropFilesTarget, Menus;

type
  TfrmMain = class(TForm)
    mmoInfo: TMemo;
    btnConvert: TButton;
    cbxSound: TCheckBox;
    procedure cbxSoundClick(Sender: TObject);
    procedure FormHide(Sender: TObject);
    procedure btnConvertClick(Sender: TObject);
    procedure FormCreate(Sender: TObject);
  private
    { Private-Deklarationen }
    FDropper: TDropFilesTarget;
    FInfoFilename: string;
    procedure SetInfoFilename(const Value: string);
    procedure FileDropped(Sender: TObject; Info: TDropFilesInfo);
  public
    { Public-Deklarationen }
    property InfoFilename: string read FInfoFilename write SetInfoFilename;
  end;

var
  frmMain: TfrmMain;

implementation

{$R *.dfm}

uses
  MMSystem, MP3Utils, micsave;

procedure TfrmMain.SetInfoFilename(const Value: string);
const
  CModes: array [0 .. 3] of string = ('Stereo', 'Joint Stereo',
   'Dual Channel', 'Mono');
  YesNo: array [boolean] of string = ('No', 'Yes');
var
  Header: TL3FHeader;
  Length: LongInt;

  procedure AddLn(const s: string);
  begin
    mmoInfo.Lines.Add(s);
  end;

begin
  if Value <> FInfoFilename then
  begin
    FInfoFilename := Value;
    btnConvert.Enabled := false;

    mmoInfo.Lines.BeginUpdate;
    try
      mmoInfo.Lines.Clear;

      try
        Length := Layer3EstimateLength(FInfoFilename, Header);
        if Length = 0 then
          AddLn('No MP3-File')
        else
        begin
          AddLn('Valid MP3-File');
          AddLn('');

          AddLn('Filename: ' + FInfoFilename);
          AddLn('');
          AddLn('Start: ' + IntToStr(Header.FileOffset) + ' (Byte)');
          AddLn('Size: ' + IntToStr(Header.FileSize) + ' (Byte)');
          AddLn('Length: ' + Format('%d:%2.2d.%3.3d', [Length div 60000,
        (Length div 1000) mod 60, Length mod 1000]));
          AddLn('Frames: ' + IntToStr(Header.TotalFrames));
          AddLn('Samples: ' + IntToStr(Header.TotalFrames * Header.LengthInSamples));
          AddLn('VBR (Xing): ' + YesNo[Header.XingHeader <> 0]);
          AddLn('');
          AddLn('MPEG ' + IntToStr(2 - Header.Version) + ' Layer ' +
        IntToStr(4 - Header.Layer));
          AddLn('Bitrate: ' + IntToStr(l3f_header_rate_kbps(Header)) + ' kbit/s');
          AddLn('Frequency: ' + IntToStr(l3f_header_freq_hz(Header)) + ' Hz');
          AddLn('Mode: ' + CModes[Header.Mode]);
          AddLn('Padding: ' + YesNo[Header.Padding <> 0]);
          AddLn('Emphasis: ' + YesNo[Header.Emphasis <> 0]);
          AddLn('CRC: ' + YesNo[Header.NoCrc = 0]);
          AddLn('Extension: ' + YesNo[Header.Extension <> 0]);
          AddLn('Copyright: ' + YesNo[Header.Copyright <> 0]);
          AddLn('Original: ' + YesNo[Header.Original <> 0]);
          AddLn('');
          AddLn('Bytes/Frame: ' + IntToStr(Header.LengthInBytes));
          AddLn('Samples/Frame: ' + IntToStr(Header.LengthInSamples));

          btnConvert.Enabled := true;
        end;
      except
        on E: Exception do
        begin
          AddLn('');
          AddLn('ERROR: ' + E.Message);
        end;
      end;
    finally
      mmoInfo.Lines.EndUpdate;
    end;
  end;
end;

procedure TfrmMain.FileDropped(Sender: TObject; Info: TDropFilesInfo);
begin
  InfoFilename := Info.Files[0];
  if Info.Files.Count > 1 then
    MessageDlg('Only one file at a time, please!', mtInformation, [mbOk], 0);
end;

procedure TfrmMain.FormCreate(Sender: TObject);
var
  rs: TResourceStream;
begin
  Icon.LoadFromResourceName(hInstance, 'MAINICON');

  FDropper := TDropFilesTarget.Create(Self);
  FDropper.TargetControl := mmoInfo;
  FDropper.OnDropFiles := FileDropped;      
  FDropper.Enabled := true;

  rs := TResourceStream.Create(hInstance, 'INFOTEXT', 'TEXT');
  try
    mmoInfo.Lines.LoadFromStream(rs);
  finally
    rs.Free;
  end;
end;

procedure TfrmMain.btnConvertClick(Sender: TObject);
begin
  if not btnConvert.Enabled then exit;
  ConvertThisFile(FInfoFilename);
end;

procedure TfrmMain.FormHide(Sender: TObject);
begin
  PlaySound(nil, hInstance, 0);
end;

procedure TfrmMain.cbxSoundClick(Sender: TObject);
begin
  if cbxSound.Checked then
    PlaySound('BACKGROUND', hInstance, SND_ASYNC or SND_LOOP or SND_RESOURCE)
  else
    PlaySound(nil, hInstance, 0);
end;

end.