src/noarch/Priority.cpp (3d07564) - Blinker · BlinkenArea

Priority.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 <list>
#include <string>

#include <BlinkenLib/BlinkenFrame.h>

#include "CallMgr.h"
#include "Directory.h"
#include "File.h"
#include "ListTracker.h"
#include "ListTracker_impl.h"
#include "Module.h"
#include "Priority.h"
#include "PriorityInput.h"
#include "OutStreamFile.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
 */
Priority::Priority(CallMgr &callMgr, StreamMgr &streamMgr,
                   const Directory &dirBase):
  Module(callMgr, streamMgr, dirBase),
  m_fileOutStream(dirBase.getFile("outstream"), streamMgr),
  m_inListTracker(*this, dirBase.getSubdir("inputs")),
  m_itCurIn(m_inListTracker.m_list.rend())
{
}

/// virtual destructor
Priority::~Priority()
{
}

/// check for update of configuration
void Priority::updateConfig()
{
  // input list update
  m_inListTracker.updateConfig();

// output stream name file was modified -> re-get output stream
  if (m_fileOutStream.checkModified())
    m_fileOutStream.update();
}

/**
 * @brief select specific input (called by inputs)
 * @param[in] input input to select
 */
void Priority::select(const Input *pInput)
{
  // search inputs for passed input
  m_itCurIn = m_inListTracker.m_list.rbegin();
  while (m_itCurIn != m_inListTracker.m_list.rend() &&
         m_itCurIn->m_pObj != pInput)
    ++m_itCurIn;

// send current frame
  curFrame();
}

/// select lower priority input (called by inputs)
void Priority::selectLower()
{
  stBlinkenFrame *pFrame;

// search inputs with lower priority until a frame is found
  while (m_itCurIn != m_inListTracker.m_list.rend()) {
    // check for frame
    if ((pFrame = m_itCurIn->m_pObj->getCurFrame())) {
      // frame found -> keep this input as current, send frame
      m_fileOutStream.setFrame(pFrame);
      return;
    }
    // try next input
    ++m_itCurIn;
  }

// no input has got a frame -> send no frame
  m_fileOutStream.setFrame(NULL);
}

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

// current input available and frame it it available -> send frame
  if (m_itCurIn != m_inListTracker.m_list.rend() &&
      (pFrame = m_itCurIn->m_pObj->getCurFrame()))
    m_fileOutStream.setFrame(pFrame);
  // no frame available -> send this information
  else
    m_fileOutStream.setFrame(NULL);
}

} // namespace Blinker

Blinker

created template class for tracking lists in directories, converted priority module to use this class