ValkkaFS2 Class Reference

Inheritance diagram for ValkkaFS2:

Collaboration diagram for ValkkaFS2:

Public Member Functions
	ValkkaFS2 (const char *device_file, const char *block_file, std::size_t blocksize, std::size_t n_blocks, bool init=false)
	Default Constructor. More...
virtual void	markKeyFrame (long int mstimestamp)
	Used by a writer class to inform that a key frame has been written.
Public Member Functions inherited from ValkkaFS
	ValkkaFS (const char *device_file, const char *block_file, std::size_t blocksize, std::size_t n_blocks, bool init=false)
	Default Constructor. More...
void	setVal (std::size_t i, std::size_t j, long int val)
	set tab's value at block i, row j
long int	getVal (std::size_t i, std::size_t j)
std::size_t	getBlockSeek (std::size_t n_block)
std::size_t	getCurrentBlockSeek ()
const std::size_t	getBlockSize ()
std::size_t	get_n_blocks ()
std::size_t	get_n_cols ()
void	dumpTable_ ()
	dump blocktable to disk. More...
void	updateDumpTable_ (std::size_t n_block)
	dump single row of bloctable to disk. More...
void	dumpTable ()
	dump blocktable to disk
void	readTable ()
	read blocktable from disk
std::string	getDevice ()
	returns device filename
std::size_t	getDeviceSize ()
	returns device file size
void	clearDevice (bool writethrough=false, bool verbose=false)
	writes zero bytes to the device
void	clearTable ()
	clears the blocktable and writes it to the disk
std::size_t	maxFrameSize ()
	returns maximum allowed frame size in bytes
void	reportTable (std::size_t from=0, std::size_t to=0, bool show_all=false)
	print blocktable
void	updateTable (bool disk_write=false)
	Tell ValkkaFS to update the blocktable, even if the block hasn't finished Typically used by an external manager that needs up-to-date information about the max timestamp in the block.
void	writeBlock (bool pycall=true, bool use_gil=true)
	Used by a writer class to inform that a new block has been written. More...
void	markFrame (long int mstimestamp)
	Used by a writer class to inform that a non-key frame has been written.
void	setCurrentBlock (std::size_t n_block)
	Set block number that's being written.
void	setBlockCallback (PyObject *pobj)
	Set a python callable that's being triggered when a new block is written.
void	setArrayCall (PyObject *pyobj)
	Copy blocktable to a given numpy array. More...

Additional Inherited Members
Protected Member Functions inherited from ValkkaFS
std::size_t	ind (std::size_t i, std::size_t j)
	first index: block number (row), second index: column
Protected Attributes inherited from ValkkaFS
std::string	device_file
std::string	block_file
std::size_t	blocksize
std::size_t	n_blocks
bool	init
	Clear the blocktable or not even if it exists.
std::size_t	device_size
std::vector< long int >	tab
	Blocktable.
std::fstream	os
	Write handle to blocktable file.
std::mutex	mutex
long int	col_0
	Current column 0 value (max keyframe timestamp)
long int	col_1
	Current column 1 value (max anyframe timestamp)
long int	col_0_lu
	col_0 at previous blocktable update
long int	col_1_lu
	col_1 at previous blocktable update
std::size_t	current_row
	Row number (block) that's being written.
std::size_t	prev_row
	Previous row number (block)
PyObject *	pyfunc
	A python callback that's triggered when the blocktable should be read again.
Static Protected Attributes inherited from ValkkaFS
static const std::size_t	n_cols = 2

Constructor & Destructor Documentation

ValkkaFS2()

ValkkaFS2::ValkkaFS2	(	const char *	device_file,
		const char *	block_file,
		std::size_t	blocksize,
		std::size_t	n_blocks,
		bool	init = false
	)

Default Constructor.

Please refer to ValkkaFS : the ctor is identical

This version of ValkkaFS is designed for one file having a single stream

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The documentation for this class was generated from the following files:

• /home/sampsa/C/valkka/include/valkkafs.h
• /home/sampsa/C/valkka/src/valkkafs.cpp