convert_NtoMbit_YCbCr.cpp

/* The copyright in this software is being made available under the BSD
 * License, included below. This software may be subject to other third party
 * and contributor rights, including patent rights, and no such rights are
 * granted under this license.
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 * Copyright (c) 2010-2020, ITU/ISO/IEC
 * All rights reserved.
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 *    this list of conditions and the following disclaimer.
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 *    be used to endorse or promote products derived from this software without
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 */

#include <cstdlib>

#include "Utilities/VideoIOYuv.h"
#include "Utilities/program_options_lite.h"
#include "CommonLib/Unit.h"


using namespace std;
namespace po = df::program_options_lite;

Int main(Int argc, const char** argv)
{
  Bool do_help;
  string filename_in, filename_out;
  UInt width, height;
  UInt bitdepth_in, bitdepth_out, chromaFormatRaw;
  UInt num_frames;
  UInt num_frames_skip;

  po::Options opts;
  opts.addOptions()
  ("help", do_help, false, "this help text")
  ("InputFile,i", filename_in, string(""), "input file to convert")
  ("OutputFile,o", filename_out, string(""), "output file")
  ("SourceWidth", width, 0u, "source picture width")
  ("SourceHeight", height, 0u, "source picture height")
  ("InputBitDepth", bitdepth_in, 8u, "bit-depth of input file")
  ("OutputBitDepth", bitdepth_out, 8u, "bit-depth of output file")
  ("ChromaFormat", chromaFormatRaw, 420u, "chroma format. 400, 420, 422 or 444 only")
  ("NumFrames", num_frames, 0xffffffffu, "number of frames to process")
  ("FrameSkip,-fs", num_frames_skip, 0u, "Number of frames to skip at start of input YUV")
  ;

  po::setDefaults(opts);
  po::scanArgv(opts, argc, argv);


  if (argc == 1 || do_help)
  {
    /* argc == 1: no options have been specified */
    po::doHelp(cout, opts);
    return EXIT_FAILURE;
  }

  ChromaFormat chromaFormatIDC=CHROMA_420;
  switch (chromaFormatRaw)
  {
    case 400: chromaFormatIDC=CHROMA_400; break;
    case 420: chromaFormatIDC=CHROMA_420; break;
    case 422: chromaFormatIDC=CHROMA_422; break;
    case 444: chromaFormatIDC=CHROMA_444; break;
    default:
      fprintf(stderr, "Bad chroma format string\n");
      return EXIT_FAILURE;
  }

  VideoIOYuv input;
  VideoIOYuv output;

  Int inputBitDepths [MAX_NUM_CHANNEL_TYPE];
  Int outputBitDepths[MAX_NUM_CHANNEL_TYPE];

  for (UInt channelTypeIndex = 0; channelTypeIndex < MAX_NUM_CHANNEL_TYPE; channelTypeIndex++)
  {
    inputBitDepths [channelTypeIndex] = bitdepth_in;
    outputBitDepths[channelTypeIndex] = bitdepth_out;
  }

  input.open((char*)filename_in.c_str(), false, inputBitDepths, inputBitDepths, outputBitDepths);
  output.open((char*)filename_out.c_str(), true, outputBitDepths, outputBitDepths, outputBitDepths);

  input.skipFrames(num_frames_skip, width, height, chromaFormatIDC);

  PelStorage frame;
  frame.create( chromaFormatIDC, Area( 0, 0, width, height));

  Int pad[2] = {0, 0};

  PelStorage cPicYuvTrueOrg;
  cPicYuvTrueOrg.create( chromaFormatIDC, Area( 0, 0, width, height));


  UInt num_frames_processed = 0;
  while (!input.isEof())
  {
    if (! input.read( frame, cPicYuvTrueOrg, IPCOLOURSPACE_UNCHANGED, pad))
    {
      break;
    }

    output.write( frame, IPCOLOURSPACE_UNCHANGED);
    num_frames_processed++;
    if (num_frames_processed == num_frames)
    {
      break;
    }
  }

  input.close();
  output.close();

  return EXIT_SUCCESS;
}