Base class for I/O. More...

#include <fileio.h>

Inheritance diagram for FileIO:

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Collaboration diagram for FileIO:

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Public Member Functions
	FileIO ()
	Create FileIO object.

virtual	~FileIO ()=default
	Free FileIO object.

virtual VIRTUALTYPE	type () const =0
	Get type of the virtual file.

virtual size_t	bufsize () const =0
	Get the ideal buffer size.

virtual int	openio (LPVIRTUALFILE virtualfile)=0
	Open a virtual file.

virtual size_t	readio (void *data, size_t size)=0
	Read data from a file.

virtual int	error () const =0
	Get last error.

virtual int64_t	duration () const =0
	Get the duration of the file, in AV_TIME_BASE fractional seconds.

virtual size_t	size () const =0
	Get the file size.

virtual size_t	tell () const =0
	Get current read position.

virtual int	seek (int64_t offset, int whence)=0
	Seek to position in file.

virtual bool	eof () const =0
	Check if at end of file.

virtual void	closeio ()=0
	Close virtual file.

LPVIRTUALFILE	virtualfile ()
	Get virtual file object.

const std::string &	filename () const
	Get source filename.

const std::string &	path () const
	Path to source file (without file name)

Static Public Member Functions
static std::shared_ptr< FileIO >	alloc (VIRTUALTYPE type)
	Allocate the correct object for type().

Protected Member Functions
void	set_virtualfile (LPVIRTUALFILE virtualfile)
	Set the virtual file object.

Private Attributes
std::string	m_path
	Source path (directory without file name)

LPVIRTUALFILE	m_virtualfile
	Virtual file object of current file.

Detailed Description

Base class for I/O.

Definition at line 259 of file fileio.h.

Constructor & Destructor Documentation

◆ FileIO()

FileIO::FileIO ( )

explicit

Create FileIO object.

Definition at line 57 of file fileio.cc.

Member Function Documentation

◆ alloc()

std::shared_ptr< FileIO > FileIO::alloc ( VIRTUALTYPE type )

static

Allocate the correct object for type().

Free with delete if no longer required.

Parameters

[in] type - VIRTUALTYPE of new object.

Returns: Upon successful completion, FileIO of the requested type. On error, (out of memory), it returns a nullptr.

Definition at line 63 of file fileio.cc.

References BLURAY, DISK, DVD, type(), and VCD.

Referenced by FFmpeg_Transcoder::open_input_file().

◆ bufsize()

virtual size_t FileIO::bufsize ( ) const

pure virtual

Get the ideal buffer size.

Returns: Return the ideal buffer size.

Implemented in BlurayIO, Buffer, DiskIO, DvdIO, and VcdIO.

◆ closeio()

virtual void FileIO::closeio ( )

pure virtual

Close virtual file.

Implemented in BlurayIO, Buffer, DiskIO, DvdIO, and VcdIO.

◆ duration()

virtual int64_t FileIO::duration ( ) const

pure virtual

Get the duration of the file, in AV_TIME_BASE fractional seconds.

This is only possible for file formats that are aware of the play time. May be AV_NOPTS_VALUE if the time is not known.

Implemented in BlurayIO, Buffer, DiskIO, DvdIO, and VcdIO.

◆ eof()

virtual bool FileIO::eof ( ) const

pure virtual

Check if at end of file.

Returns: Returns true if at end of file.

Implemented in BlurayIO, Buffer, DiskIO, DvdIO, and VcdIO.

Referenced by FFmpeg_Transcoder::input_read().

◆ error()

virtual int FileIO::error ( ) const

pure virtual

Get last error.

Returns: errno value of last error.

Implemented in BlurayIO, Buffer, DiskIO, DvdIO, and VcdIO.

Referenced by FFmpeg_Transcoder::input_read().

◆ filename()

const std::string & FileIO::filename ( ) const

Get source filename.

Returns: Returns source filename.

Definition at line 123 of file fileio.cc.

References VIRTUALFILE::m_destfile, and m_virtualfile.

Referenced by Buffer::init(), Buffer::make_cachefile_name(), Buffer::map_file(), Buffer::reallocate(), Buffer::remove_file(), and Buffer::unmap_file().

◆ openio()

virtual int FileIO::openio ( LPVIRTUALFILE virtualfile )

pure virtual

Open a virtual file.

Parameters

[in] virtualfile - LPCVIRTUALFILE of file to open.

Returns: Upon successful completion, openio() returns 0.
On error, a nonzero value is returned and errno is set to indicate the error.

Implemented in BlurayIO, Buffer, DiskIO, DvdIO, and VcdIO.

◆ path()

const std::string & FileIO::path ( ) const

Path to source file (without file name)

Returns: Returns path to source file.

Definition at line 118 of file fileio.cc.

References m_path.

Referenced by BlurayIO::openio(), DvdIO::openio(), VcdIO::openio(), BlurayIO::readio(), and DvdIO::readio().

◆ readio()

virtual size_t FileIO::readio	(	void *	data,
		size_t	size
	)

pure virtual

Read data from a file.

Parameters

[out]	data	- A buffer to store read bytes in. It must be large enough to hold up to size bytes.
[in]	size	- The number of bytes to read.

Returns: Upon successful completion, readio() returns the number of bytes read.
This may be less than size.
On error, the value 0 is returned and errno is set to indicate the error.
If at the end of the file, 0 may be returned but errno is not set. error() will return 0 if at EOF.

Implemented in BlurayIO, Buffer, DiskIO, DvdIO, and VcdIO.

Referenced by FFmpeg_Transcoder::input_read().

◆ seek()

virtual int FileIO::seek	(	int64_t	offset,
		int	whence
	)

pure virtual

Seek to position in file.

Repositions the offset of the open file to the argument offset according to the directive whence.

Parameters

[in]	offset	- offset in bytes
[in]	whence	- how to seek: SEEK_SET: The offset is set to offset bytes. SEEK_CUR: The offset is set to its current location plus offset bytes. SEEK_END: The offset is set to the size of the file plus offset bytes.

Returns: Upon successful completion, seek() returns the resulting offset location as measured in bytes from the beginning of the file.
On error, the value -1 is returned and errno is set to indicate the error.

Implemented in BlurayIO, Buffer, DiskIO, DvdIO, and VcdIO.

Referenced by FFmpeg_Transcoder::seek().