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RawHandler Class Reference

#include <filehandler.h>

Inheritance diagram for RawHandler:

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Collaboration diagram for RawHandler:

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List of all members.

Public Member Functions

 RawHandler ()
 ~RawHandler ()
bool FileIsOpen ()
bool Create (const string &filename)
int Write (const Frame &frame)
int Close ()
off_t GetFileSize ()
int GetTotalFrames ()
bool Open (const char *s)
int GetFrame (Frame &frame, int frameNum)

Public Attributes

int fd

Private Attributes

int numBlocks

Constructor & Destructor Documentation

RawHandler::RawHandler (   ) 
 

Definition at line 329 of file filehandler.cc.

References FileHandler::extension.

00329                        : fd( -1 )
00330 {
00331     extension = ".dv";
00332 }

RawHandler::~RawHandler (   ) 
 

Definition at line 335 of file filehandler.cc.

References Close().

00336 {
00337     Close();
00338 }

Member Function Documentation

int RawHandler::Close (   )  [virtual]
 

Implements FileHandler.

Definition at line 366 of file filehandler.cc.

References fd.

Referenced by ~RawHandler().

00367 {
00368     if ( fd != -1 )
00369     {
00370         close( fd );
00371         fd = -1;
00372     }
00373     return 0;
00374 }

bool RawHandler::Create (  const string &  filename  )  [virtual]
 

Implements FileHandler.

Definition at line 347 of file filehandler.cc.

References fd, and FileTracker::GetInstance().

00348 {
00349     fd = open( filename.c_str(), O_CREAT | O_TRUNC | O_RDWR | O_NONBLOCK, 0644 );
00350     if ( fd != -1 )
00351     {
00352         FileTracker::GetInstance().Add( filename.c_str() );
00353         this->filename = filename;
00354     }
00355     return ( fd != -1 );
00356 }

bool RawHandler::FileIsOpen (   )  [virtual]
 

Implements FileHandler.

Definition at line 341 of file filehandler.cc.

References fd.

00342 {
00343     return fd != -1;
00344 }

off_t RawHandler::GetFileSize (   )  [virtual]
 

Implements FileHandler.

Definition at line 377 of file filehandler.cc.

References fd.

Referenced by GetTotalFrames().

00378 {
00379     struct stat file_status;
00380     fstat( fd, &file_status );
00381     return file_status.st_size;
00382 }

int RawHandler::GetFrame (  Frame &  frame,
int  frameNum
)  [virtual]
 

Implements FileHandler.

Definition at line 406 of file filehandler.cc.

References Frame::data, fail_if, fd, and numBlocks.

00407 {
00408     assert( fd != -1 );
00409     int size = 480 * numBlocks;
00410     if ( frameNum < 0 )
00411         return -1;
00412     off_t offset = ( ( off_t ) frameNum * ( off_t ) size );
00413     fail_if( lseek( fd, offset, SEEK_SET ) == ( off_t ) - 1 );
00414     if ( read( fd, frame.data, size ) > 0 )
00415     {
00416         frame.ExtractHeader();
00417         return 0;
00418     }
00419     else
00420         return -1;
00421 }

int RawHandler::GetTotalFrames (   )  [virtual]
 

Implements FileHandler.

Definition at line 384 of file filehandler.cc.

References GetFileSize(), and numBlocks.

00385 {
00386     return GetFileSize() / ( 480 * numBlocks );
00387 }

bool RawHandler::Open (  const char *  s  )  [virtual]
 

Implements FileHandler.

Definition at line 390 of file filehandler.cc.

References fd, FileHandler::filename, and numBlocks.

00391 {
00392     unsigned char data[ 4 ];
00393     assert( fd == -1 );
00394     fd = open( s, O_RDONLY | O_NONBLOCK );
00395     if ( fd < 0 )
00396         return false;
00397     if ( read( fd, data, 4 ) < 0 )
00398         return false;
00399     lseek( fd, 0, SEEK_SET );
00400     numBlocks = ( ( data[ 3 ] & 0x80 ) == 0 ) ? 250 : 300;
00401     filename = s;
00402     return true;
00403 
00404 }

int RawHandler::Write (  const Frame &  frame  )  [virtual]
 

Implements FileHandler.

Definition at line 359 of file filehandler.cc.

References Frame::data, fd, and Frame::GetFrameSize().

00360 {
00361     int result = write( fd, frame.data, frame.GetFrameSize() );
00362     return result;
00363 }

Member Data Documentation

int RawHandler::fd
 

Definition at line 122 of file filehandler.h.

Referenced by Close(), Create(), FileIsOpen(), GetFileSize(), GetFrame(), Open(), and Write().

int RawHandler::numBlocks [private]
 

Definition at line 136 of file filehandler.h.

Referenced by GetFrame(), GetTotalFrames(), and Open().

The documentation for this class was generated from the following files:
Generated on Sun Mar 11 22:13:24 2007 for Kino by  doxygen 1.4.2