src/noarch/Resizer.cpp (105f9e6) - Blinker · BlinkenArea

Resizer.cpp

/* Blinker
   Copyright 2011 Stefan Schuermans <stefan@blinkenarea.org>
   Copyleft GNU public license - http://www.gnu.org/copyleft/gpl.html
   a blinkenarea.org project */

#include <iostream>
#include <stdlib.h>
#include <string>

#include <BlinkenLib/BlinkenFrame.h>

#include "CallMgr.h"
#include "Directory.h"
#include "File.h"
#include "Format.h"
#include "Module.h"
#include "Resizer.h"
#include "SettingFile.h"
#include "StreamMgr.h"
#include "StreamRecv.h"

namespace Blinker {

/**
 * @brief constructor
 * @param[in] callMgr callback manager
 * @param[in] streamMgr stream manager
 * @param[in] dirBase base directory
 */
Resizer::Resizer(CallMgr &callMgr, StreamMgr &streamMgr,
                 const Directory &dirBase):
  Module(callMgr, streamMgr, dirBase),
  m_fileInStream(dirBase.getFile("instream")),
  m_fileFormat(dirBase.getFile("format")),
  m_fileOutStream(dirBase.getFile("outstream")),
  m_pInStream(NULL),
  m_haveFormat(false),
  m_pOutStream(NULL)
{
  // set up
  getInStream();
  getFormat();
  getOutStream();
}

/// virtual destructor
Resizer::~Resizer()
{
  // clean up
  releaseInStream();
  releaseOutStream();
}

/// check for update of configuration
void Resizer::updateConfig()
{
  // stream name or format file was modified -> re-get stream or format
  if (m_fileInStream.checkModified()) {
    releaseInStream();
    getInStream();
  }
  if (m_fileFormat.checkModified()) {
    getFormat();
  }
  if (m_fileOutStream.checkModified()) {
    releaseOutStream();
    getOutStream();
  }
}

/**
 * @brief set current frame
 * @param[in] stream stream name
 * @param[in] pFrame current frame
 */
void Resizer::setFrame(const std::string &stream, stBlinkenFrame *pFrame)
{
  procFrame(pFrame);
  (void)stream; // unused
}

/**
 * @brief set current frame to none
 * @param[in] stream stream name
 */
void Resizer::setNoFrame(const std::string &stream)
{
  procNoFrame();
  (void)stream; // unused
}

/// get input stream and attach to it
void Resizer::getInStream()
{
  // get input stream
  m_fileInStream.getStr(m_nameInStream);
  m_pInStream = &m_streamMgr.refStream(m_nameInStream);

// attach to input stream
  if (m_pInStream)
    m_pInStream->attach(this);
}

/// detach from input stream and release it
void Resizer::releaseInStream()
{
  // detach from input stream
  if (m_pInStream)
    m_pInStream->detach(this);

// unreference stream
  m_pInStream = NULL;
  m_streamMgr.unrefStream(m_nameInStream);
}

/// (re-)get format to resize to
void Resizer::getFormat()
{
  std::string strFormat;

// read format from format file
  m_haveFormat = m_fileFormat.getStr(strFormat) && m_format.fromStr(strFormat);

// send current frame to output stream
  sendFrame();
}

/// get output stream
void Resizer::getOutStream()
{
  // get output stream
  m_fileOutStream.getStr(m_nameOutStream);
  m_pOutStream = &m_streamMgr.refStream(m_nameOutStream);

// send current frame to output stream
  sendFrame();
}

/// release output stream
void Resizer::releaseOutStream()
{
  // send no frame information
  if (m_pOutStream)
    m_pOutStream->setNoFrame();

// unreference stream
  m_pOutStream = NULL;
  m_streamMgr.unrefStream(m_nameOutStream);
}

/// send current frame to output stream
void Resizer::sendFrame()
{
  stBlinkenFrame *pFrame;

// get current frame from input stream and process it
  if (m_pInStream && m_pInStream->getCurFrame(pFrame))
    procFrame(pFrame);
  else
    procNoFrame();
}

/**
 * @brief process frame
 * @param[in] pFrame frame to process
 */
void Resizer::procFrame(stBlinkenFrame *pFrame)
{
  stBlinkenFrame *pProcFrame;

// no output stream -> nothing to do
  if (!m_pOutStream)
    return;

// no format -> pass "no frame"
  if (!m_haveFormat) {
    m_pOutStream->setNoFrame();
    return;
  }

// format matches -> pass frame directly
  if ((unsigned int)BlinkenFrameGetWidth(pFrame) == m_format.m_width &&
      (unsigned int)BlinkenFrameGetHeight(pFrame) == m_format.m_height &&
      (unsigned int)BlinkenFrameGetChannels(pFrame) == m_format.m_channels &&
      (unsigned int)BlinkenFrameGetMaxval(pFrame) == m_format.m_maxval) {
    m_pOutStream->setFrame(pFrame);
    return;
  }

// clone frame
  pProcFrame = BlinkenFrameClone(pFrame);
  if (!pProcFrame){
    m_pOutStream->setNoFrame();
    return;
  }

// resize frame
  BlinkenFrameResize(pProcFrame, m_format.m_height, m_format.m_width,
                                 m_format.m_channels, m_format.m_maxval);

// pass process frame to output stream
  m_pOutStream->setFrame(pProcFrame);

// free cloned frame
  BlinkenFrameFree(pProcFrame);
}

/// process "no frame"
void Resizer::procNoFrame()
{
  // pass "no frame" to output stream
  if (m_pOutStream)
    m_pOutStream->setNoFrame();
}

} // namespace Blinker

Blinker

implemented resizer module