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/* 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.
*
* Copyright (c) 2010-2022, ITU/ISO/IEC
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* * Neither the name of the ITU/ISO/IEC nor the names of its contributors may
* be used to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
/** \file SEIRemovalApp.cpp
\brief Decoder application class
*/
#include <list>
#include <vector>
#include <stdio.h>
#include <fcntl.h>
#include "SEIRemovalApp.h"
#include "TLibDecoder/AnnexBread.h"
#include "TLibDecoder/NALread.h"
//! \ingroup DecoderApp
//! \{
// ====================================================================================================================
// Constructor / destructor / initialization / destroy
// ====================================================================================================================
SEIRemovalApp::SEIRemovalApp()
{
}
// ====================================================================================================================
// Public member functions
// ====================================================================================================================
/**
- create internal class
- initialize internal class
- until the end of the bitstream, call decoding function in SEIRemovalApp class
- delete allocated buffers
- destroy internal class
- returns the number of mismatching pictures
*/
Void read2(InputNALUnit& nalu)
{
TComInputBitstream& bs = nalu.getBitstream();
Bool forbidden_zero_bit = bs.read(1); // forbidden_zero_bit
if (forbidden_zero_bit != 0)
{
std::cerr << "Forbidden zero-bit not '0'" << std::endl;
exit(1);
}
nalu.m_nalUnitType = (NalUnitType) bs.read(6); // nal_unit_type
nalu.m_nuhLayerId = bs.read(6); // nuh_layer_id
nalu.m_temporalId = bs.read(3) - 1; // nuh_temporal_id_plus1
}
UInt SEIRemovalApp::decode()
{
// Int poc;
// PicList* pcListPic = NULL;
ifstream bitstreamFileIn(m_bitstreamFileNameIn.c_str(), ifstream::in | ifstream::binary);
if (!bitstreamFileIn)
{
std::cerr << "failed to open bitstream file " << m_bitstreamFileNameIn.c_str() << " for reading";
exit(1);
}
ofstream bitstreamFileOut(m_bitstreamFileNameOut.c_str(), ifstream::out | ifstream::binary);
InputByteStream bytestream(bitstreamFileIn);
bitstreamFileIn.clear();
bitstreamFileIn.seekg( 0, ios::beg );
int unitCnt = 0;
while (!!bitstreamFileIn)
{
/* location serves to work around a design fault in the decoder, whereby
* the process of reading a new slice that is the first slice of a new frame
* requires the SEIRemovalApp::decode() method to be called again with the same
* nal unit. */
AnnexBStats stats = AnnexBStats();
InputNALUnit nalu;
byteStreamNALUnit(bytestream, nalu.getBitstream().getFifo(), stats);
// call actual decoding function
if (nalu.getBitstream().getFifo().empty())
{
/* this can happen if the following occur:
* - empty input file
* - two back-to-back start_code_prefixes
* - start_code_prefix immediately followed by EOF
*/
std::cerr << "Warning: Attempt to decode an empty NAL unit" << std::endl;
}
else
{
read2( nalu );
unitCnt++;
bool bWrite = true;
// just kick out all suffix SEIS
bWrite &= (( !m_discardSuffixSEIs || nalu.m_nalUnitType != NAL_UNIT_SUFFIX_SEI ) && ( !m_discardPrefixSEIs || nalu.m_nalUnitType != NAL_UNIT_PREFIX_SEI ));
bWrite &= unitCnt >= m_numNALUnitsToSkip;
bWrite &= m_numNALUnitsToWrite < 0 || unitCnt <= m_numNALUnitsToWrite;
if( bWrite )
{
int iNumZeros = stats.m_numLeadingZero8BitsBytes + stats.m_numZeroByteBytes + stats.m_numStartCodePrefixBytes -1;
char ch = 0;
for( int i = 0 ; i < iNumZeros; i++ ) { bitstreamFileOut.write( &ch, 1 ); }
ch = 1; bitstreamFileOut.write( &ch, 1 );
bitstreamFileOut.write( (const char*)nalu.getBitstream().getFifo().data(), nalu.getBitstream().getFifo().size() );
}
}
}
return 0;
}
//! \}
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