/*    This file is a part of plaYUVer project
 *    Copyright (C) 2014  by Luis Lucas      (luisfrlucas@gmail.com)
 *                           Joao Carreira   (jfmcarreira@gmail.com)
 *
 *    This program is free software; you can redistribute it and/or modify
 *    it under the terms of the GNU General Public License as published by
 *    the Free Software Foundation; either version 2 of the License, or
 *    (at your option) any later version.
 *
 *    This program is distributed in the hope that it will be useful,
 *    but WITHOUT ANY WARRANTY; without even the implied warranty of
 *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *    GNU General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License along
 *   with this program; if not, write to the Free Software Foundation, Inc.,
 *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

/**
 * \file     PlaYUVerStream.cpp
 * \brief    Input stream handling
 */

#include "config.h"
#include <cstdio>
#include "LibMemory.h"
#include "PlaYUVerStream.h"
#include <QImage>
#ifdef USE_FFMPEG
#include "LibAvContextHandle.h"
#endif

namespace plaYUVer
{

QDataStream& operator<<( QDataStream& out, const PlaYUVerStreamInfoVector& array )
{
  PlaYUVerStreamInfo d;
  out << array.size();
  for( Int i = 0; i < array.size(); i++ )
  {
    d = array.at( i );
    out << d.m_cFilename << d.m_uiWidth
                         << d.m_uiHeight
                         << d.m_iPelFormat
                         << d.m_uiFrameRate;

  }
  return out;
}

QDataStream& operator>>( QDataStream& in, PlaYUVerStreamInfoVector& array )
{
  PlaYUVerStreamInfo d;
  Int array_size;
  in >> array_size;
  for( Int i = 0; i < array_size; i++ )
  {
    in >> d.m_cFilename;
    in >> d.m_uiWidth;
    in >> d.m_uiHeight;
    in >> d.m_iPelFormat;
    in >> d.m_uiFrameRate;
    array.append( d );
  }
  return in;
}

Int findPlaYUVerStreamInfo( PlaYUVerStreamInfoVector array, QString filename )
{
  for( Int i = 0; i < array.size(); i++ )
    if( array.at( i ).m_cFilename == filename )
      return i;
  return -1;
}

PlaYUVerStream::PlaYUVerStream()
{
  m_bInit = false;
  m_bIsInput = true;
  m_bIsOpened = false;
  m_bLoadAll = false;
  m_iErrorStatus = 0;

  m_pFile = NULL;
  m_uiWidth = 0;
  m_uiHeight = 0;
  m_uiTotalFrameNum = 0;
  m_iCurrFrameNum = -1;
  m_iPixelFormat = -1;
  m_uiFrameRate = 30;
  m_iFileFormat = INVALID_INPUT;
  m_pStreamBuffer = NULL;
  m_cFilename = QString( "" );
  m_cStreamInformationString = QString( "" );
  m_pcCurrFrame = NULL;
  m_pcNextFrame = NULL;
  m_ppcFrameBuffer = NULL;
  m_uiFrameBufferSize = 2;
  m_uiFrameBufferIndex = 0;
#ifdef USE_FFMPEG
  m_cLibAvContext = new LibAvContextHandle;
#endif
}

PlaYUVerStream::~PlaYUVerStream()
{
  close();
}

Bool PlaYUVerStream::open( QString filename, UInt width, UInt height, Int input_format, UInt frame_rate, Bool bInput )
{
  Bool avStatus = false;

  if( m_bInit )
  {
    close();
  }

  m_bInit = false;
  m_bIsInput = bInput;
  m_cFilename = filename;
  m_uiWidth = width;
  m_uiHeight = height;
  m_iPixelFormat = input_format;
  m_uiFrameRate = frame_rate;

  if( m_bIsInput )
  {
    m_iFileFormat = INVALID_INPUT;

    QStringList formatsExt = PlaYUVerStream::supportedReadFormatsExt();
    QString currExt = QFileInfo( filename ).suffix();
    if( formatsExt.contains( currExt ) )
    {
      m_iFileFormat = formatsExt.indexOf( currExt );
    }
    if( m_iFileFormat == INVALID_INPUT )
    {
      close();
      return m_bInit;
    }
    m_cFormatName = PlaYUVerStream::supportedReadFormatsExt().at( m_iFileFormat ).toUpper();

#ifdef USE_FFMPEG
    if( m_iFileFormat != YUVINPUT )
    {
      avStatus = m_cLibAvContext->initAvFormat( m_cFilename.toLocal8Bit().data(), m_uiWidth, m_uiHeight, m_iPixelFormat, m_uiFrameRate, m_uiTotalFrameNum );
      m_cCodedName = QString::fromUtf8( m_cLibAvContext->getCodecName() ).toUpper();
    }
#endif
#if 0
    if( !avStatus )
    {
      switch( m_iFileFormat )
      {
        case PGMINPUT:

        break;
      }
    }
#endif
    m_uiFrameBufferSize = 2;
  }
  else
  {
    m_iFileFormat = YUVOUTPUT;
    m_uiFrameBufferSize = 1;
  }

  if( m_uiWidth <= 0 || m_uiHeight <= 0 || m_iPixelFormat < 0 )
  {
    qDebug( ) << "Incorrect configuration";
    close();
    return m_bInit;
  }

  getMem1D<PlaYUVerFrame*>( &m_ppcFrameBuffer, m_uiFrameBufferSize );
  for( UInt i = 0; i < m_uiFrameBufferSize; i++ )
  {
    m_ppcFrameBuffer[i] = new PlaYUVerFrame( m_uiWidth, m_uiHeight, m_iPixelFormat );
    if( !m_ppcFrameBuffer[i] )
    {
      qDebug( ) << "Cannot allocated frame buffer";
      close();
      return m_bInit;
    }
  }
  m_uiFrameBufferIndex = 0;
  m_pcCurrFrame = m_ppcFrameBuffer[m_uiFrameBufferIndex];

  UInt64 frame_bytes_input = m_pcCurrFrame->getBytesPerFrame();

  if( !avStatus )
  {
    if( !openFile() )
    {
      close();
      return m_bInit;
    }
    m_cFormatName = QString::fromUtf8( "YUV" );
    m_cCodedName = QString::fromUtf8( "Raw Video" );
  }

  if( !avStatus && m_iFileFormat == YUVINPUT )
  {
    if( m_bIsInput )
    {
      fseek( m_pFile, 0, SEEK_END );
      UInt64 fileSize = ftell( m_pFile );
#if 0
      if( fileSize % frame_bytes_input )
      {
        Int remaining = fileSize % frame_bytes_input;
        qDebug( ) << "Incorrect configuration: failed ( fileSize % frame_bytes_input = " << remaining << " )";
        close();
        return m_bInit;
      }
#endif
      m_uiTotalFrameNum = fileSize / frame_bytes_input;
      fseek( m_pFile, 0, SEEK_SET );
    }

  }

  if( m_bIsInput && m_uiTotalFrameNum <= 0 )
  {
    qDebug( ) << "Incorrect configuration: less than one frame";
    close();
    return m_bInit;
  }

  if( !getMem1D<Pel>( &m_pStreamBuffer, m_pcCurrFrame->getBytesPerFrame() ) )
  {
    close();
    return m_bInit;
  }

  m_cStreamInformationString = QString( "[" );
  m_cStreamInformationString.append( m_cFormatName );
  m_cStreamInformationString.append( QString( " / " ) );
  m_cStreamInformationString.append( m_cCodedName );
  m_cStreamInformationString.append( QString( " / " ) );
  m_cStreamInformationString.append( PlaYUVerFrame::supportedPixelFormatListNames().at( m_iPixelFormat ) );
  m_cStreamInformationString.append( "] " );
  m_cStreamInformationString.append( QFileInfo( m_cFilename ).fileName() );

  m_sStreamInfo.m_cFilename = m_cFilename;
  m_sStreamInfo.m_uiWidth = m_uiWidth;
  m_sStreamInfo.m_uiHeight = m_uiHeight;
  m_sStreamInfo.m_iPelFormat = m_iPixelFormat;
  m_sStreamInfo.m_uiFrameRate = m_uiFrameRate;

  m_iCurrFrameNum = -1;

  m_bInit = true;

  seekInput( 0 );

  m_bInit = true;
  return m_bInit;
}

Bool PlaYUVerStream::openFile()
{
  m_pFile = NULL;
  Char *filename = new char[m_cFilename.length() + 1];
  memcpy( filename, m_cFilename.toUtf8().constData(), m_cFilename.length() + 1 * sizeof(char) );
  m_pFile = fopen( filename, m_bIsInput ? "rb" : "wb" );
  delete[] filename;
  if( m_pFile == NULL )
  {
    return false;
  }
  fseek( m_pFile, m_iCurrFrameNum >= 0 ? m_iCurrFrameNum : 0, SEEK_SET );
  return true;
}

Void PlaYUVerStream::closeFile()
{
  if( m_pFile )
    fclose( m_pFile );
}

Void PlaYUVerStream::close()
{
  if( !m_bInit )
    return;

  closeFile();

#ifdef USE_FFMPEG
  m_cLibAvContext->closeAvFormat();
#endif

  if( m_ppcFrameBuffer )
  {
    for( UInt i = 0; i < m_uiFrameBufferSize; i++ )
    {
      if( m_ppcFrameBuffer[i] )
        delete m_ppcFrameBuffer[i];
      m_ppcFrameBuffer[i] = NULL;
    }
    freeMem1D<PlaYUVerFrame*>( m_ppcFrameBuffer );
    m_ppcFrameBuffer = NULL;
  }

  if( m_pStreamBuffer )
    freeMem1D<Pel>( m_pStreamBuffer );

  m_bLoadAll = false;
  m_bInit = false;
}

Void PlaYUVerStream::getFormat( UInt& rWidth, UInt& rHeight, Int& rInputFormat, UInt& rFrameRate )
{
  if( m_bInit )
  {
    rWidth = m_uiWidth;
    rHeight = m_uiHeight;
    rInputFormat = m_iPixelFormat;
    rFrameRate = m_uiFrameRate;
  }
  else
  {
    rWidth = 0;
    rHeight = 0;
    rInputFormat = PlaYUVerFrame::YUV420p;
    rFrameRate = 30;
  }
}

Bool PlaYUVerStream::guessFormat( QString filename, UInt& rWidth, UInt& rHeight, Int& rInputFormat, UInt& rFrameRate )
{
  Bool bRet = false;
  QString FilenameShort = QFileInfo( filename ).fileName();
  QString fileExtension = QFileInfo( filename ).suffix();
  if( !fileExtension.compare( "yuv" ) )
  {
    bRet = true;
    // Guess pixel format
    QStringList formats_list = PlaYUVerFrame::supportedPixelFormatListNames();
    for( Int i = 0; i < formats_list.size(); i++ )
    {
      if( FilenameShort.contains( formats_list.at( i ), Qt::CaseInsensitive ) )
      {
        rInputFormat = i;
        break;
      }
    }

    if( rWidth == 0 || rHeight == 0 )
    {
      // Guess resolution - match  resolution name
      Int iMatch = -1;
      QStringList stdResName = standardResolutionSizes().stringListName;
      for( Int i = 0; i < stdResName.size(); i++ )
      {
        if( FilenameShort.contains( stdResName.at( i ) ) )
        {
          if( iMatch >= 0 )
          {
            if( stdResName.at( i ).size() > stdResName.at( iMatch ).size() )
            {
              iMatch = i;
            }
          }
          else
          {
            iMatch = i;
          }
        }
      }
      if( iMatch >= 0 )
      {
        rWidth = standardResolutionSizes().sizeResolution.at( iMatch ).width();
        rHeight = standardResolutionSizes().sizeResolution.at( iMatch ).height();
      }
      // Guess resolution - match %dx%d
#if( QT_VERSION_PLAYUVER == 5 )
      QRegularExpressionMatch resolutionMatch = QRegularExpression( "_\\d*x\\d*" ).match( FilenameShort );
      if( resolutionMatch.hasMatch() )
      {
        QString resolutionString = resolutionMatch.captured( 0 );
        if( resolutionString.startsWith( "_" ) || resolutionString.endsWith( "_" ) )
        {
          resolutionString.remove( "_" );
          QStringList resolutionArgs = resolutionString.split( "x" );
          qDebug( ) << "Found resolution = " << resolutionArgs;
          if( resolutionArgs.size() == 2 )
          {
            rWidth = resolutionArgs.at( 0 ).toUInt();
            rHeight = resolutionArgs.at( 1 ).toUInt();
          }
        }
      }
#endif
    }

    // Guess resolution by file size
    if( rWidth == 0 && rHeight == 0 )
    {

      Char *filename_char = new char[filename.length() + 1];
      memcpy( filename_char, filename.toUtf8().constData(), filename.length() + 1 * sizeof(char) );
      FILE* pF = fopen( filename_char, "rb" );
      fseek( pF, 0, SEEK_END );
      UInt64 uiFileSize = ftell( pF );
      fclose( pF );
      delete[] filename_char;

      if( pF != NULL )
      {
        Int count = 0, module, frame_bytes, match;
        QVector<QSize> sizeResolution = standardResolutionSizes().sizeResolution;
        for( Int i = 0; i < sizeResolution.size(); i++ )
        {
          frame_bytes = PlaYUVerFrame::getBytesPerFrame( sizeResolution.at( i ).width(), sizeResolution.at( i ).height(), rInputFormat );
          module = uiFileSize % frame_bytes;
          if( module == 0 )
          {
            match = i;
            count++;
          }
        }
        if( count == 1 )
        {
          rWidth = sizeResolution.at( match ).width();
          rHeight = sizeResolution.at( match ).height();
        }
      }

    }

    if( rWidth > 0 && rHeight > 0 && rInputFormat >= 0 )
      bRet = false;
  }
  return bRet;
}

Void PlaYUVerStream::loadAll()
{
  if( m_bLoadAll || !m_bIsInput )
    return;

  if( m_ppcFrameBuffer )
  {
    for( UInt i = 0; i < m_uiFrameBufferSize; i++ )
    {
      if( m_ppcFrameBuffer[i] )
        delete m_ppcFrameBuffer[i];
      m_ppcFrameBuffer[i] = NULL;
    }
    freeMem1D<PlaYUVerFrame*>( m_ppcFrameBuffer );
    m_ppcFrameBuffer = NULL;
  }
  m_uiFrameBufferSize = m_uiTotalFrameNum;
  getMem1D<PlaYUVerFrame*>( &m_ppcFrameBuffer, m_uiFrameBufferSize );
  for( UInt i = 0; i < m_uiFrameBufferSize; i++ )
  {
    m_ppcFrameBuffer[i] = new PlaYUVerFrame( m_uiWidth, m_uiHeight, m_iPixelFormat );
    if( !m_ppcFrameBuffer[i] )
    {
      close();
    }
  }
  m_uiFrameBufferIndex = 0;
  m_pcCurrFrame = m_ppcFrameBuffer[m_uiFrameBufferIndex];
  m_iCurrFrameNum = -1;
  seekInput( 0 );
  setNextFrame();
  for( UInt i = m_uiFrameBufferIndex; i < m_uiFrameBufferSize; i++ )
  {
    readFrame();
    setNextFrame();
  }
  m_bLoadAll = true;
  seekInput( 0 );
}

Void PlaYUVerStream::getDuration( Int* duration_array )
{
  Int hours, mins, secs;
#ifdef USE_FFMPEG
  if( m_cLibAvContext->getStatus() )
  {
    secs = m_cLibAvContext->getStreamDuration();
  }
  else
#endif
  {
    secs = m_uiTotalFrameNum / m_uiFrameRate;
  }
  mins = secs / 60;
  secs %= 60;
  hours = mins / 60;
  mins %= 60;
  *duration_array++ = hours;
  *duration_array++ = mins;
  *duration_array++ = secs;
}

Void PlaYUVerStream::readFrame()
{
  if( !m_bInit || !m_bIsInput )
    return;

  if( m_iCurrFrameNum + 1 >= ( Int64 )m_uiTotalFrameNum )
  {
    m_iErrorStatus = LAST_FRAME;
    m_pcNextFrame = NULL;
    return;
  }

  if( m_bLoadAll )
  {
    return;
  }

#ifdef USE_FFMPEG
  if( m_cLibAvContext->getStatus() )
  {
    if( !m_cLibAvContext->decodeAvFormat() )
    {
      m_iErrorStatus = READING;
      return;
    }
    m_pcNextFrame->frameFromBuffer( m_cLibAvContext->m_pchFrameBuffer, m_cLibAvContext->m_uiFrameBufferSize );
  }
  else
#endif
  {
    UInt64 frame_bytes_input = m_pcNextFrame->getBytesPerFrame();
    UInt64 bytes_read = fread( m_pStreamBuffer, sizeof(Pel), frame_bytes_input, m_pFile );
    if( bytes_read != frame_bytes_input )
    {
      m_iErrorStatus = READING;
      qDebug( ) << " Reading error !!!"
                << endl;
      return;
    }
    m_pcNextFrame->frameFromBuffer( m_pStreamBuffer, bytes_read );
  }
  m_pcNextFrame->fillRGBBuffer();
  return;
}

Void PlaYUVerStream::writeFrame()
{
  UInt64 frame_bytes_input = m_pcCurrFrame->getBytesPerFrame();
  m_pcCurrFrame->frameToBuffer( m_pStreamBuffer );
  UInt64 bytes_read = fwrite( m_pStreamBuffer, sizeof(Pel), frame_bytes_input, m_pFile );
  if( bytes_read != frame_bytes_input )
  {
    m_iErrorStatus = WRITING;
  }
  return;
}

Void PlaYUVerStream::writeFrame( PlaYUVerFrame *pcFrame )
{
  UInt64 frame_bytes_input = pcFrame->getBytesPerFrame();
  pcFrame->frameToBuffer( m_pStreamBuffer );
  UInt64 bytes_read = fwrite( m_pStreamBuffer, sizeof(Pel), frame_bytes_input, m_pFile );
  if( bytes_read != frame_bytes_input )
  {
    m_iErrorStatus = WRITING;
  }
  return;
}

Bool PlaYUVerStream::saveFrame( const QString& filename )
{
  return saveFrame( filename, m_pcCurrFrame );
}

Bool PlaYUVerStream::saveFrame( const QString& filename, PlaYUVerFrame *saveFrame )
{
  Int iFileFormat = INVALID_OUTPUT;

  QStringList formatsExt = PlaYUVerStream::supportedSaveFormatsExt();
  QString currExt = QFileInfo( filename ).suffix();
  if( formatsExt.contains( currExt ) )
  {
    iFileFormat = formatsExt.indexOf( currExt );
  }

  if( iFileFormat < TOTAL_OUTPUT_FORMATS )
  {
    PlaYUVerStream auxFrameStream;
    if( !auxFrameStream.open( filename, saveFrame->getWidth(), saveFrame->getHeight(), saveFrame->getPelFormat(), 1, false ) )
    {
      return false;
    }
    auxFrameStream.writeFrame( saveFrame );
    auxFrameStream.close();
    return true;
  }
  else
  {
    saveFrame->fillRGBBuffer();
    QImage qimg = QImage( saveFrame->getRGBBuffer(), saveFrame->getWidth(), saveFrame->getHeight(), QImage::Format_RGB32 );
    return qimg.save( filename );
  }
  return false;
}

Void PlaYUVerStream::setNextFrame()
{
  if( m_pcNextFrame )
  {
    m_pcCurrFrame = m_pcNextFrame;
    m_iCurrFrameNum++;
    m_uiFrameBufferIndex++;
    if( m_uiFrameBufferIndex == m_uiFrameBufferSize )
    {
      m_uiFrameBufferIndex = 0;
    }
    m_pcNextFrame = m_ppcFrameBuffer[m_uiFrameBufferIndex];
  }
  else
  {
    m_iErrorStatus = END_OF_SEQ;
    seekInput( 0 );
  }
}

PlaYUVerFrame* PlaYUVerStream::getCurrFrame( PlaYUVerFrame *pyuv_image )
{
  if( pyuv_image == NULL )
    pyuv_image = new PlaYUVerFrame( m_pcCurrFrame );
  else
    pyuv_image->copyFrom( m_pcCurrFrame );
  return pyuv_image;
}

PlaYUVerFrame* PlaYUVerStream::getCurrFrame()
{
  return m_pcCurrFrame;
}

Bool PlaYUVerStream::seekInput( UInt64 new_frame_num )
{
  if( !m_bInit || new_frame_num < 0 || new_frame_num >= m_uiTotalFrameNum || ( Int64 )new_frame_num == m_iCurrFrameNum )
    return false;

  m_iCurrFrameNum = new_frame_num - 1;

  if( m_bLoadAll )
  {
    m_uiFrameBufferIndex = new_frame_num;
    m_pcNextFrame = m_ppcFrameBuffer[m_uiFrameBufferIndex];
    setNextFrame();
    return true;
  }
#ifdef USE_FFMPEG
  if( m_cLibAvContext->getStatus() )
  {
    m_cLibAvContext->seekAvFormat( new_frame_num );
  }
  else
#endif
  {
    UInt64 frame_bytes_input = m_ppcFrameBuffer[0]->getBytesPerFrame();
    UInt64 nbytes_seek = frame_bytes_input * new_frame_num;
    fseek( m_pFile, nbytes_seek, SEEK_SET );
  }
  m_uiFrameBufferIndex = 0;
  m_pcCurrFrame = m_pcNextFrame = m_ppcFrameBuffer[m_uiFrameBufferIndex];

  readFrame();
  setNextFrame();
  if( m_uiTotalFrameNum > 1 )
    readFrame();
  return true;
}

Bool PlaYUVerStream::checkErrors( Int error_type )
{
  if( m_iErrorStatus == error_type )
  {
    m_iErrorStatus = NO_STREAM_ERROR;
    return true;
  }
  if( m_iErrorStatus == error_type )
  {
    m_iErrorStatus = NO_STREAM_ERROR;
    return true;
  }
  return false;
}

}  // NAMESPACE