upscale.cc

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/*--------------------------------------------------------------------
 *
 * (C) Copyright Koninklijke Philips Electronics NV 2006. 
 * All rights reserved. This software is licensed under the terms of
 * version 2.1 of the GNU Lesser General Public License as published 
 * by the Free Software Foundation. For licensing and warranty
 * information, see the file COPYING in the main directory.
 *
 *------------------------------------------------------------------*/

#include "upscale.h"

/* The number of bits coefficients are scaled up before 2-D IDCT: */

const unsigned int S_BITS = 3;

inline
VYApixel SCALE(VYApixel x, unsigned int n)
{
  return x << n;
}

UpScale::UpScale(
  const Id&   n, 
  In<VYApixel>&   ci, 
  Out<VYApixel>&  co)
:
      Process(n),
      CIn(  id("CIn"),  ci),
      COut( id("COut"), co)
{
}

void UpScale::main()
{
  VYApixel pixelIn;
  VYApixel pixelOut;

  while (true)
      {
    read(CIn, pixelIn);
    pixelOut = SCALE(pixelIn, S_BITS);
    write(COut, pixelOut);
  }
}

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