EMAN::V4L2IO Class Reference

Read-only. More...

#include <v4l2io.h>

Inheritance diagram for EMAN::V4L2IO:

Collaboration diagram for EMAN::V4L2IO:

Public Member Functions
	V4L2IO (const string &fname, IOMode rw_mode=READ_ONLY)
	~V4L2IO ()
Public Member Functions inherited from EMAN::ImageIO
	ImageIO (const string &fname, IOMode rw)
virtual	~ImageIO ()
virtual int	read_header (Dict &dict, int image_index=0, const Region *area=0, bool is_3d=false)=0
	Read the header from an image. More...
virtual int	write_header (const Dict &dict, int image_index=0, const Region *area=0, EMUtil::EMDataType filestoragetype=EMUtil::EM_FLOAT, bool use_host_endian=true)=0
	Write a header to an image. More...
virtual int	read_data (float *data, int image_index=0, const Region *area=0, bool is_3d=false)=0
	Read the data from an image. More...
virtual int	read_data_8bit (unsigned char *data, int image_index=0, const Region *area=0, bool is_3d=false, float minval=0.0f, float maxval=0.0f)
	Read the data from an image as an 8 bit array, regardless of format. More...
virtual int	write_data (float *data, int image_index=0, const Region *area=0, EMUtil::EMDataType filestoragetype=EMUtil::EM_FLOAT, bool use_host_endian=true)=0
	Write data to an image. More...
virtual int	read_ctf (Ctf &ctf, int image_index=0)
	Read CTF data from this image. More...
virtual void	write_ctf (const Ctf &ctf, int image_index=0)
	Write CTF data to this image. More...
virtual void	flush ()=0
	Flush the IO buffer. More...
virtual int	get_nimg ()
	Return the number of images in this image file. More...
virtual bool	is_complex_mode ()=0
	Is this an complex image or not. More...
virtual bool	is_image_big_endian ()=0
	Is this image in big endian or not. More...
virtual bool	is_single_image_format () const
	Is this image format only storing 1 image or not. More...
template<class T >
void	become_host_endian (T *data, size_t n=1)
	Convert data of this image into host endian format. More...
string	get_filename () const

Static Public Member Functions
static bool	is_valid (const void *first_block)
static int	globalinit (const char *fsp, int input=0, int brt=-1, int cont=-1, int gamma=-1, int expos=-1, int gain=-1)

Public Attributes
	DEFINE_IMAGEIO_FUNC

Private Attributes
char *	filename
int	v4l_file
int	nx
int	ny

Additional Inherited Members
Public Types inherited from EMAN::ImageIO
enum	IOMode { READ_ONLY = 1 , READ_WRITE = 2 , WRITE_ONLY = 3 }
Protected Member Functions inherited from EMAN::ImageIO
virtual void	init ()=0
	Do some initialization before doing the read/write. More...
void	check_read_access (int image_index)
	Validate 'image_index' in file reading. More...
void	check_read_access (int image_index, const float *data)
	Validate 'image_index' and 'data' in file reading. More...
void	check_write_access (IOMode rw_mode, int image_index, int max_nimg=0)
	Validate rw_mode and image_index in file writing. More...
void	check_write_access (IOMode rw_mode, int image_index, int max_nimg, const float *data)
	Validate rw_mode, image_index, and data pointer in file writing. More...
void	check_region (const Region *area, const FloatSize &max_size, bool is_new_file=false, bool inbounds_only=true)
	Validate image I/O region. More...
void	check_region (const Region *area, const IntSize &max_size, bool is_new_file=false, bool inbounds_only=true)
	Validate image I/O region. More...
FILE *	sfopen (const string &filename, IOMode mode, bool *is_new=0, bool overwrite=false)
	Run fopen safely. More...
Protected Attributes inherited from EMAN::ImageIO
string	filename
IOMode	rw_mode
FILE *	file = nullptr
bool	initialized = false

Detailed Description

Read-only.

Acquires images from the V4L2 interface in real-time (video4linux). ie - this will read from a framegrabber, etc.

Definition at line 45 of file v4l2io.h.

Constructor & Destructor Documentation

V4L2IO()

EMAN::V4L2IO::V4L2IO ( const string &  fname, IOMode  rw_mode = READ_ONLY  )

explicit

~V4L2IO()

EMAN::V4L2IO::~V4L2IO

(

)

Member Function Documentation

globalinit()

static int EMAN::V4L2IO::globalinit ( const char *  fsp, int  input = 0, int  brt = -1, int  cont = -1, int  gamma = -1, int  expos = -1, int  gain = -1  )

static

is_valid()

static bool EMAN::V4L2IO::is_valid ( const void *  first_block )

static

Member Data Documentation

DEFINE_IMAGEIO_FUNC

EMAN::V4L2IO::DEFINE_IMAGEIO_FUNC

Definition at line 51 of file v4l2io.h.

filename

char* EMAN::V4L2IO::filename

private

Definition at line 57 of file v4l2io.h.

nx

int EMAN::V4L2IO::nx

private

Definition at line 61 of file v4l2io.h.

ny

int EMAN::V4L2IO::ny

private

Definition at line 62 of file v4l2io.h.

v4l_file

int EMAN::V4L2IO::v4l_file

private

Definition at line 58 of file v4l2io.h.

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

• v4l2io.h