Kino: FileHandler Class Reference

00215 {
00216     static TimeCode prevTimeCode = { 0, 0, -1, 0 };
00217     TimeCode timeCode;
00218 
00219     /* If the user wants autosplit, start a new file if a
00220        new recording is detected. */
00221     frame.GetTimeCode( timeCode );
00222     int time_diff = timeCode.sec - prevTimeCode.sec;
00223     bool discontinuity = prevTimeCode.sec != -1 && ( time_diff > 1 || ( time_diff < 0 && time_diff > -59 ) );
00224     if ( FileIsOpen() && GetAutoSplit() == true && ( frame.IsNewRecording() || discontinuity ) )
00225     {
00226         Close();
00227     }
00228 
00229     if ( FileIsOpen() == false )
00230     {
00231 
00232         string filename;
00233         static int counter = 0;
00234 
00235         if ( GetTimeStamp() == true )
00236         {
00237             ostringstream sb, sb2;
00238             struct tm   date;
00239             string  recDate;
00240 
00241             if ( ! frame.GetRecordingDate( date ) )
00242             {
00243                 struct timeval tv;
00244                 struct timezone tz;
00245                 gettimeofday( &tv, &tz );
00246                 localtime_r( static_cast< const time_t * >( &tv.tv_sec ), &date );
00247             }
00248             sb << setfill( '0' )
00249             << setw( 4 ) << date.tm_year + 1900 << '.'
00250             << setw( 2 ) << date.tm_mon + 1 << '.'
00251             << setw( 2 ) << date.tm_mday << '_'
00252             << setw( 2 ) << date.tm_hour << '-'
00253             << setw( 2 ) << date.tm_min << '-'
00254             << setw( 2 ) << date.tm_sec;
00255             recDate = sb.str();
00256             sb2 << GetBaseName() << recDate << GetExtension();
00257             filename = sb2.str();
00258             cerr << ">>> Trying " << filename << endl;
00259         }
00260         else
00261         {
00262             struct stat stats;
00263             do
00264             {
00265                 ostringstream sb;
00266                 sb << GetBaseName() << setfill( '0' ) << setw( 3 ) << ++ counter << GetExtension();
00267                 filename = sb.str();
00268                 cerr << ">>> Trying " << filename << endl;
00269             }
00270             while ( stat( filename.c_str(), &stats ) == 0 );
00271         }
00272 
00273         SetSampleFrame( frame );
00274         if ( Create( filename ) == false )
00275         {
00276             cerr << ">>> Error creating file!" << endl;
00277             return false;
00278         }
00279         framesWritten = 0;
00280         framesToSkip = 0;
00281     }
00282 
00283     /* write frame */
00284 
00285     if ( framesToSkip == 0 )
00286     {
00287         if ( 0 > Write( frame ) )
00288         {
00289             cerr << ">>> Error writing frame!" << endl;
00290             return false;
00291         }
00292         framesToSkip = everyNthFrame;
00293         ++framesWritten;
00294     }
00295     framesToSkip--;
00296 
00297     /* If the frame count is exceeded, close the current file.
00298        If the autosplit flag is set, a new file will be created in the next iteration.
00299        If the flag is not set, we are done. */
00300 
00301     if ( ( GetMaxFrameCount() > 0 ) &&
00302             ( framesWritten >= GetMaxFrameCount() ) )
00303     {
00304         Close();
00305         done = !GetAutoSplit();
00306     }
00307 
00308     /* If the file size could be exceeded by another frame, close the current file.
00309        If the autosplit flag is set, a new file will be created on the next iteration.
00310        If the flag is not set, we are done. */
00311     /* not exact, but should be good enough to prevent going over. */
00312     if ( FileIsOpen() )
00313     {
00314         AudioInfo info;
00315         frame.GetAudioInfo( info );
00316         if ( ( GetFileSize() > 0 ) && ( GetMaxFileSize() > 0 ) &&
00317                 ( GetFileSize() + frame.GetFrameSize() + info.samples * 4 + 12 )
00318                 >= GetMaxFileSize() )
00319         {                     // 12 = sizeof chunk metadata
00320             Close();
00321             done = !GetAutoSplit();
00322         }
00323     }
00324     prevTimeCode.sec = timeCode.sec;
00325     return true;
00326 }


Public Member Functions
	FileHandler ()
virtual	~FileHandler ()
virtual bool	GetAutoSplit () const
virtual bool	GetTimeStamp () const
virtual string	GetBaseName () const
virtual string	GetExtension () const
virtual int	GetMaxFrameCount () const
virtual off_t	GetMaxFileSize () const
virtual off_t	GetFileSize ()=0
virtual int	GetTotalFrames ()=0
virtual string	GetFilename () const
virtual void	SetAutoSplit (bool)
virtual void	SetTimeStamp (bool)
virtual void	SetBaseName (const string &base)
virtual void	SetMaxFrameCount (int)
virtual void	SetEveryNthFrame (int)
virtual void	SetMaxFileSize (off_t)
virtual void	SetSampleFrame (const Frame &sample)
virtual bool	WriteFrame (const Frame &frame)
virtual bool	FileIsOpen ()=0
virtual bool	Create (const string &filename)=0
virtual int	Write (const Frame &frame)=0
virtual int	Close ()=0
virtual bool	Done (void)
virtual bool	Open (const char *s)=0
virtual int	GetFrame (Frame &frame, int frameNum)=0
int	GetFramesWritten () const
Protected Attributes
bool	done
bool	autoSplit
bool	timeStamp
int	maxFrameCount
int	framesWritten
int	everyNthFrame
int	framesToSkip
off_t	maxFileSize
string	base
string	extension
string	filename

FileHandler Class Reference

Public Member Functions

Protected Attributes

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation