public override bool fill_input_buffer()
{
Tiff tif = m_sp.GetTiff();
byte[] mem = null;
uint len = 0;
if (!m_sp.OJPEGWriteStream(out mem, out len))
Tiff.ErrorExt(tif, tif.m_clientdata, "LibJpeg", "Premature end of JPEG data");
initInternalBuffer(mem, (int)len);
return true;
}