用Fmx调用Bass.dll

先上图

帮亲戚做个小软件，选用FMX，因为画面不会像vcl那样在图片多的时候闪烁。还能添加动画

但是MediaPlayer播放音乐视频真是不给力，视频没想到好办法。音频方面想到之前万一的Bass.ll的教程

尝试用FMX做下试试

结果发现Bass也是跨开台,Github上有个老外做了个收音机

下面是从万一博客上拷贝的代码，按照fmx的稍做了点修改

begin

  if not OpenDialog1.Execute then
    Exit;

  BASS_StreamFree(hs);

  hs := BASS_StreamCreateFile(False, PChar(OpenDialog1.FileName), 0, 0, BASS_UNICODE);
  if hs < BASS_ERROR_ENDED then
  begin
    Caption := '打开失败:' + hs.tostring;
  end
  else
    Caption :=OpenDialog1.FileName;
end

这个是打开文件，新版的支持UNICODE

const
  w = 8;
var
  i,di: Integer;
begin
  if BASS_ChannelIsActive(hs) <> BASS_ACTIVE_PLAYING then Exit;

  BASS_ChannelGetData(hs, @FFTData, BASS_DATA_FFT1024);

  Image1.Bitmap.SetSize(Round(Image1.Width),Round(Image1.Height));
  Image1.Bitmap.Canvas.BeginScene;
  Image1.Bitmap.Canvas.Clear(talphacolors.Black);

  for i := 0 to Length(FFTData) - 1 do
  begin
    di := Trunc(Abs(FFTData[i]) * 500);

    if di > Image1.Height then di := Round(Image1.Height);
    if di >= FFTPeacks[i] then FFTPeacks[i] := di else FFTPeacks[i] := FFTPeacks[i] - 1;
    if di >= FFTFallOff[i] then FFTFallOff[i] := di else FFTFallOff[i] := FFTFallOff[i] - 3;
    if (Image1.Height - FFTPeacks[i]) > Image1.Height then FFTPeacks[i] := 0;
    if (Image1.Height - FFTFallOff[i]) > Image1.Height then FFTFallOff[i] := 0;

    with Image1.Bitmap.Canvas do
    begin
      Fill.Color :=talphacolors.red;
      FillRect(RectF(i * (w + 1), Image1.Height - FFTFallOff[i], i * (w + 1) + w, Image1.Height),0,0,AllCorners, 100);
    end;

  end;
  Image1.Bitmap.Canvas.EndScene;
end;

这个是绘制波形的，其他函数直接copy万一博客的代码就可以用