selbstgebastelter webcam stream

[Astat]

Zitat von jokerfacehro:

Hoffe da hat jemand was parat

Hallo jokerfacehro, hatte dies mal in Verwendung. Errorbehandlung musst Du nachziehn, ist damals etwas dürftig ausgefallen.

Delphi-Quellcode:

uses
  ZLibEx;


procedure CompressBitmap_Slow(bmp: TBitmap; var Data: string);
var
   ms    : TMemoryStream;
   buf   : pointer;
   size  : integer;
begin
  ms := TMemoryStream.Create;
  bmp.SaveToStream(ms);
  ZCompress(ms.Memory, ms.Size, buf, size);
  SetLength(Data, size);
  Move(buf^, Data[1], size);
  FreeMem(buf);
  ms.Free;
end;

procedure CompressBitmap(bmp: TBitmap; var Data: string);
var
   cs: TZCompressionStream;
   ms: TMemoryStream;
begin
  ms := TMemoryStream.Create;
  cs := TZCompressionStream.Create(ms,zcDefault); // clDefault ist schneller als clMax
  bmp.SaveToStream(cs);
  cs.Free;
  SetLength(Data, ms.Size);
  Move(ms.Memory^, Data[1], ms.Size);
  ms.Free;
end;

procedure UnCompressBitmap(const Data: string; bmp: TBitmap);
var
  ms    : TMemoryStream;
  buf   : pointer;
  size  : integer;
  outsize:integer;
begin
   try
     size:=0;
     outsize:=Length(Data) * 3;
     ZDecompress(@Data[1], Length(Data), buf,outsize, size);
   except
      on E: Exception do begin
         E.Message := Format('Error Decompressing Buffer (Len = %d):'#13#10'%s', [Length(Data), e.Message]);
         raise;
      end;
   end;
   ms := TMemoryStream.Create;
   ms.Write(buf^, outSize);
   FreeMem(buf);
   ms.Position := 0;
   Assert(bmp <> nil);
   bmp.LoadFromStream(ms);
   ms.Free;
end;

lg. Astat