145 lines
3.9 KiB
C++
145 lines
3.9 KiB
C++
/* This file is a part of plaYUVer project
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* Copyright (C) 2014-2016 by Luis Lucas (luisfrlucas@gmail.com)
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* Joao Carreira (jfmcarreira@gmail.com)
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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/**
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* \file StreamHandlerPortableMap.cpp
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* \ingroup PlaYUVerLib
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* \brief Interface with opencv lib
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*/
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#include <cstdio>
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#include <cmath>
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#include "StreamHandlerPortableMap.h"
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#include "PlaYUVerFrame.h"
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#include "PlaYUVerFramePixelFormats.h"
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#include "LibMemory.h"
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namespace plaYUVer
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{
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Bool StreamHandlerPortableMap::openHandler( std::string strFilename, Bool bInput )
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{
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m_bIsInput = bInput;
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m_pFile = NULL;
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m_pFile = fopen( strFilename.c_str(), bInput ? "rb" : "wb" );
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if( m_pFile == NULL )
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{
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return false;
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}
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m_strFormatName = "PGM";
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m_strCodecName = "Raw Video";
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if( m_bIsInput )
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{
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char line[101];
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while( fgets( line, 100, m_pFile ) && line[0] == '#' );
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sscanf( line,"P%d", &m_iMagicNumber );
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while( fgets( line, 100, m_pFile ) && line[0] == '#' );
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sscanf( line,"%u %u", &m_uiWidth, &m_uiHeight );
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if( m_iMagicNumber == 1 || m_iMagicNumber == 4 )
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{
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m_uiBitsPerPixel = 1;
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m_iMaxValue = 1;
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m_iPixelFormat = PlaYUVerFrame::GRAY;
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}
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else
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{
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while( fgets( line, 100, m_pFile ) && line[0] == '#' );
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sscanf( line,"%d", &m_iMaxValue );
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m_uiBitsPerPixel = log( m_iMaxValue + 1 )/log( 2 );
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m_iPixelFormat = m_iMagicNumber == 2 || m_iMagicNumber == 5 ? PlaYUVerFrame::GRAY : PlaYUVerFrame::RGB24;
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}
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}
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else
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{
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m_iMaxValue = ( 1 << m_uiBitsPerPixel ) - 1;
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if( m_uiBitsPerPixel == 1 )
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{
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m_iMagicNumber = 4;
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}
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else if( m_iPixelFormat == PlaYUVerFrame::GRAY )
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{
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m_iMagicNumber = 5;
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}
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else if( m_iPixelFormat == PlaYUVerFrame::RGB24 )
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{
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m_iMagicNumber = 6;
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}
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else
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{
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closeHandler();
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return false;
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}
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}
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m_iEndianness = 0;
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m_dFrameRate = 1;
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return true;
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}
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Void StreamHandlerPortableMap::closeHandler()
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{
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if( m_pFile )
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fclose( m_pFile );
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if( m_pStreamBuffer )
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freeMem1D( m_pStreamBuffer );
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}
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Bool StreamHandlerPortableMap::configureBuffer( PlaYUVerFrame* pcFrame )
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{
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return getMem1D<Byte>( &m_pStreamBuffer, pcFrame->getBytesPerFrame() );
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}
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UInt64 StreamHandlerPortableMap::calculateFrameNumber()
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{
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return 1;
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}
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Bool StreamHandlerPortableMap::seek( UInt64 iFrameNum )
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{
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return true;
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}
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Bool StreamHandlerPortableMap::read( PlaYUVerFrame* pcFrame )
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{
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UInt64 processed_bytes = fread( m_pStreamBuffer, sizeof( Byte ), m_uiNBytesPerFrame, m_pFile );
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if( processed_bytes != m_uiNBytesPerFrame )
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return false;
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pcFrame->frameFromBuffer( m_pStreamBuffer );
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return true;
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}
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Bool StreamHandlerPortableMap::write( PlaYUVerFrame* pcFrame )
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{
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fseek( m_pFile, 0, SEEK_SET );
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fprintf( m_pFile, "P%d\n%d %d\n", m_iMagicNumber, m_uiWidth, m_uiHeight );
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if( m_iMagicNumber > 4 )
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{
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fprintf( m_pFile, "%d\n", m_iMaxValue );
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}
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pcFrame->frameToBuffer( m_pStreamBuffer );
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UInt64 processed_bytes = fwrite( m_pStreamBuffer, sizeof( Byte ), m_uiNBytesPerFrame, m_pFile );
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if( processed_bytes != m_uiNBytesPerFrame )
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return false;
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return true;
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}
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} // NAMESPACE
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