Gv::CaptureV4l Class Reference

A video capture implementation for video-for-linux (v4l). More...

#include <gvcapture_v4l.h>

Inheritance diagram for Gv::CaptureV4l:

Public Types
enum	io_method { IO_METHOD_READ, IO_METHOD_MMAP, IO_METHOD_USERPTR }

Public Member Functions
	CaptureV4l (const std::string &dev_name, const std::string &dev_config)
	Constructor. More...
	~CaptureV4l ()
	Destructor.
virtual void	start () override
	Override from Gv::Capture.
virtual void	stop () override
	Override from Gv::Capture.
virtual bool	simple () const override
	Override from Gv::Capture.
virtual bool	read (unsigned char *, size_t) override
	Override from Gv::Capture.
virtual bool	read (CaptureCallback &) override
	Override from Gv::Capture.
virtual int	fd () const override
	Override from Gv::Capture.
virtual unsigned int	dx () const override
	Override from Gv::Capture.
virtual unsigned int	dy () const override
	Override from Gv::Capture.
virtual bool	active () const override
	Override from Gv::Capture.
virtual std::string	info () const override
	Override from Gv::Capture.
Public Member Functions inherited from Gv::Capture
virtual	~Capture ()=0
	Destructor.

Friends
class	Gv::CaptureRequeuer

Detailed Description

A video capture implementation for video-for-linux (v4l).

Definition at line 40 of file gvcapture_v4l.h.

Member Enumeration Documentation

enum Gv::CaptureV4l::io_method

Enumerator
IO_METHOD_USERPTR	TODO DMA method.

Definition at line 43 of file gvcapture_v4l.h.

Constructor & Destructor Documentation

Gv::CaptureV4l::CaptureV4l	(	const std::string &	dev_name,
		const std::string &	dev_config
	)

Constructor.

Opens the video device, with optional device-specific configuration that can include "buffers=<n>", "nolibv4l", "mmap", "read", "userptr", and "fmt=<n>". The number of buffers should be small to reduce latency, or larger for better throughput.

Definition at line 153 of file gvcapture_v4l.cpp.

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

• /home/graeme/videotools/src/gvideo/gvcapture_v4l.h
• /home/graeme/videotools/src/gvideo/gvcapture_v4l.cpp