scaling_env.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 "scaling_env.h"

ScalingEnv::ScalingEnv (
  const Id&             n,
  In<pT_header>&        seqInfo,
  In<scaling_args_t>&   scaleArguments,
  Out<VYAimageWidth>&   YimageWidth,
  Out<VYAimageHeight>&  YimageHeight,
  Out<VYAimageWidth>&   UVimageWidth,
  Out<VYAimageHeight>&  UVimageHeight)
:
  Process(n),
  seqInfoP(       id("seqInfoP"),       seqInfo),
  scaleArgumentsP(id("scaleArgumentsP"),scaleArguments),
  YimageWidthP(   id("YimageWidthP"),   YimageWidth),
  YimageHeightP(  id("YimageHeightP"),  YimageHeight),
  UVimageWidthP(  id("UVimageWidthP"),  UVimageWidth),
  UVimageHeightP( id("UVimageHeightP"), UVimageHeight)
{ }

void ScalingEnv::main()
{
  while(true)
  {
    pT_header       seqInfo;
    pT_color        colorInfo;
    scaling_args_t  arguments;

    int             nrImages;
    int             interlaceFactor;
    
    VYAimageWidth   YimageWidth;
    VYAimageHeight  YimageHeight;

    VYAimageWidth   UVimageWidth;
    VYAimageHeight  UVimageHeight;

    read(seqInfoP, seqInfo);
    interlaceFactor = (p_is_interlaced(&seqInfo) ? 2 : 1);
    colorInfo = p_get_color_format(&seqInfo);

    read(scaleArgumentsP, arguments);
   
    #ifdef VERBOSE
      printf("\n%s:\n   Resizing frames to size %d pixels x %d lines\n\n",
        fullName(), arguments.hsize, arguments.vsize);
    #endif

    nrImages     = interlaceFactor * p_get_num_frames(&seqInfo);
    YimageWidth  = arguments.hsize;
    YimageHeight = arguments.vsize / interlaceFactor;
       
    if ((colorInfo == P_COLOR_420) || (colorInfo == P_COLOR_420_PL))
    {
      UVimageWidth = YimageWidth / 2;
      UVimageHeight = YimageHeight / 2;
    } 
    else if ((colorInfo == P_COLOR_422) || (colorInfo == P_COLOR_422_PL))
    {
      UVimageWidth = YimageWidth / 2;
      UVimageHeight = YimageHeight;
    }
    else if ((colorInfo == P_COLOR_RGB) || (colorInfo == P_COLOR_444_PL))
    {
      UVimageWidth = YimageWidth;
      UVimageHeight = YimageHeight;
    }

    for (int i=0; i<nrImages; i++)
    {
      write(YimageWidthP, YimageWidth);
      write(YimageHeightP, YimageHeight);
      if (colorInfo != P_NO_COLOR)
      {
        write(UVimageWidthP, UVimageWidth);
        write(UVimageHeightP, UVimageHeight);
      }
    }
  }
}

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