streamCircBuff.hpp

Go to the documentation of this file.

/** \file streamCircBuff.hpp
  * \brief The MagAO-X streamCircBuff app header file
  *
  * \ingroup streamCircBuff_files
  */
 
#ifndef streamCircBuff_hpp
#define streamCircBuff_hpp
 
 
#include "../../libMagAOX/libMagAOX.hpp" //Note this is included on command line to trigger pch
#include "../../magaox_git_version.h"
 
/** \defgroup streamCircBuff
  * \brief An application to keep a circular buffer of a stream
  *
  * <a href="../handbook/operating/software/apps/streamCircBuff.html">Application Documentation</a>
  *
  * \ingroup apps
  *
  */
 
/** \defgroup streamCircBuff_files
  * \ingroup streamCircBuff
  */
 
namespace MagAOX
{
namespace app
{
 
/// Class for application to keep a circular buffer of a stream and publish it to another stream
/** 
  * \ingroup streamCircBuff
  */
class streamCircBuff : public MagAOXApp<true>, public dev::shmimMonitor<streamCircBuff>, public dev::frameGrabber<streamCircBuff>, public dev::telemeter<streamCircBuff>
{
   friend class dev::shmimMonitor<streamCircBuff>;
   friend class dev::frameGrabber<streamCircBuff>;
   friend class dev::telemeter<streamCircBuff>;
 
public:
 
   /** \name app::dev Configurations
     *@{
     */
   
   static constexpr bool c_frameGrabber_flippable = false; ///< app:dev config to tell framegrabber these images can not be flipped
   
   ///@}
 
   typedef float realT;
 
   /// The base shmimMonitor type
   typedef dev::shmimMonitor<streamCircBuff> shmimMonitorT;
 
   /// The base frameGrabber type
   typedef dev::frameGrabber<streamCircBuff> frameGrabberT;
 
   /// The telemeter type
   typedef dev::telemeter<streamCircBuff> telemeterT;
 
   
protected:
 
   /** \name Configurable Parameters
     *@{
     */
   
   
   
   ///@}
 
   char * m_currSrc;
 
   sem_t m_smSemaphore {0}; ///< Semaphore used to synchronize the fg thread and the sm thread.
 
public:
   /// Default c'tor.
   streamCircBuff();
 
   /// D'tor, declared and defined for noexcept.
   ~streamCircBuff() noexcept
   {}
 
   virtual void setupConfig();
 
   /// Implementation of loadConfig logic, separated for testing.
   /** This is called by loadConfig().
     */
   int loadConfigImpl( mx::app::appConfigurator & _config /**< [in] an application configuration from which to load values*/);
 
   virtual void loadConfig();
 
   /// Startup function
   /**
     *
     */
   virtual int appStartup();
 
   /// Implementation of the FSM for streamCircBuff.
   /** 
     * \returns 0 on no critical error
     * \returns -1 on an error requiring shutdown
     */
   virtual int appLogic();
 
   /// Shutdown the app.
   /** 
     *
     */
   virtual int appShutdown();
 
   
protected:
 
   //shmimMonitor Interface
   int allocate( const dev::shmimT & dummy /**< [in] tag to differentiate shmimMonitor parents.*/);
   
   int allocatePSDStreams();
 
   int processImage( void * curr_src,          ///< [in] pointer to start of current frame.
                     const dev::shmimT & dummy ///< [in] tag to differentiate shmimMonitor parents.
                   );
 
   /** \name dev::frameGrabber interface
     *
     * @{
     */
   
   /// Implementation of the framegrabber configureAcquisition interface
   /** 
     * \returns 0 on success
     * \returns -1 on error
     */
   int configureAcquisition();
   
   /// Implementation of the framegrabber fps interface
   /**
     * \todo this needs to infer the stream fps and return it
     */  
   float fps()
   {
      return 1.0;
   }
   
   /// Implementation of the framegrabber startAcquisition interface
   /** 
     * \returns 0 on success
     * \returns -1 on error
     */
   int startAcquisition();
   
   /// Implementation of the framegrabber acquireAndCheckValid interface
   /** 
     * \returns 0 on success
     * \returns -1 on error
     */
   int acquireAndCheckValid();
   
   /// Implementation of the framegrabber loadImageIntoStream interface
   /** 
     * \returns 0 on success
     * \returns -1 on error
     */
   int loadImageIntoStream( void * dest  /**< [in] */);
   
   /// Implementation of the framegrabber reconfig interface
   /** 
     * \returns 0 on success
     * \returns -1 on error
     */
   int reconfig();
 
   /** \name Telemeter Interface
     * 
     * @{
     */ 
   int checkRecordTimes();
   
   int recordTelem( const telem_fgtimings * );
 
   ///@}
 
};
 
streamCircBuff::streamCircBuff() : MagAOXApp(MAGAOX_CURRENT_SHA1, MAGAOX_REPO_MODIFIED)
{
   
   return;
}
 
void streamCircBuff::setupConfig()
{
   shmimMonitorT::setupConfig(config);
   frameGrabberT::setupConfig(config);
   telemeterT::setupConfig(config);
   
}
 
int streamCircBuff::loadConfigImpl( mx::app::appConfigurator & _config )
{
   shmimMonitorT::loadConfig(_config);
   frameGrabberT::loadConfig(_config);
   telemeterT::loadConfig(config);   
 
   return 0;
}
 
void streamCircBuff::loadConfig()
{
   loadConfigImpl(config);
}
 
int streamCircBuff::appStartup()
{
   if(sem_init(&m_smSemaphore, 0,0) < 0)
   {
      log<software_critical>({__FILE__, __LINE__, errno,0, "Initializing S.M. semaphore"});
      return -1;
   }
 
   if(shmimMonitorT::appStartup() < 0)
   {
      return log<software_error,-1>({__FILE__, __LINE__});
   }
 
   if(frameGrabberT::appStartup() < 0)
   {
      return log<software_error,-1>({__FILE__, __LINE__});
   }
 
   if(telemeterT::appStartup() < 0)
   {
      return log<software_error,-1>({__FILE__, __LINE__});
   }
 
   state(stateCodes::OPERATING);
 
   return 0;
}
 
int streamCircBuff::appLogic()
{
   if( shmimMonitorT::appLogic() < 0)
   {
      return log<software_error,-1>({__FILE__,__LINE__});
   }
 
   if( frameGrabberT::appLogic() < 0)
   {
      return log<software_error,-1>({__FILE__,__LINE__});
   }
 
   if( telemeterT::appLogic() < 0)
   {
      return log<software_error,-1>({__FILE__,__LINE__});
   }
 
   std::unique_lock<std::mutex> lock(m_indiMutex);
 
   if(shmimMonitorT::updateINDI() < 0)
   {
      log<software_error>({__FILE__, __LINE__});
   }
 
   if(frameGrabberT::updateINDI() < 0)
   {
      log<software_error>({__FILE__, __LINE__});
   }
 
   return 0;
}
 
int streamCircBuff::appShutdown()
{
   shmimMonitorT::appShutdown();
   frameGrabberT::appShutdown();
   telemeterT::appShutdown();
 
   return 0;
}
 
int streamCircBuff::allocate( const dev::shmimT & dummy)
{
   static_cast<void>(dummy);
 
   //we don't actually do anything here -- just a pass through to f.g.
   return 0;
}
   
int streamCircBuff::processImage( void * curr_src,
                                  const dev::shmimT & dummy
                                )
{
   static_cast<void>(dummy);
 
   m_currSrc = static_cast<char *>(curr_src);
 
   //Now tell the f.g. to get going
   if(sem_post(&m_smSemaphore) < 0)
   {
      log<software_critical>({__FILE__, __LINE__, errno, 0, "Error posting to semaphore"});
      return -1;
   }
 
   return 0;
}
 
inline
int streamCircBuff::configureAcquisition()
{
   std::unique_lock<std::mutex> lock(m_indiMutex);
 
   ///\todo potential but verrrrry unlikely bug: shmimMonitorT could change these before allocate sets the lock above.  Should use a local set of w/h instead.
   if(shmimMonitorT::m_width==0 || shmimMonitorT::m_height==0)
   {
      //This means we haven't connected to the stream to accumulate. so wait.
      lock.unlock(); //don't hold the lock for a whole second.
      sleep(1);
      return -1;
   }
   
   frameGrabberT::m_width = shmimMonitorT::m_width;
   frameGrabberT::m_height = shmimMonitorT::m_height;
   frameGrabberT::m_dataType = shmimMonitorT::m_dataType;
   
   return 0;
}
 
int streamCircBuff::startAcquisition()
{
   return 0;
}
 
int streamCircBuff::acquireAndCheckValid()
{
   timespec ts;
         
   if(clock_gettime(CLOCK_REALTIME, &ts) < 0)
   {
      log<software_critical>({__FILE__,__LINE__,errno,0,"clock_gettime"}); 
      return -1;
   }
         
   ts.tv_sec += 1;
        
   if(sem_timedwait(&m_smSemaphore, &ts) == 0)
   {
      clock_gettime(CLOCK_REALTIME, &m_currImageTimestamp);
      return 0;
   }
   else
   {
      return 1;
   }
}
 
int streamCircBuff::loadImageIntoStream(void * dest)
{
   memcpy(dest, m_currSrc, shmimMonitorT::m_width*shmimMonitorT::m_height*frameGrabberT::m_typeSize  );
   return 0;
}
 
int streamCircBuff::reconfig()
{
   return 0;
}
 
int streamCircBuff::checkRecordTimes()
{
   return telemeterT::checkRecordTimes(telem_fgtimings());
}
   
inline
int streamCircBuff::recordTelem( const telem_fgtimings * )
{
   return recordFGTimings(true);
}
 
 
} //namespace app
} //namespace MagAOX
 
#endif //streamCircBuff_hpp