CVD::V4L1Buffer< T > Class Template Reference
[Video buffers]

#include <v4l1buffer.h>

Inheritance diagram for CVD::V4L1Buffer< T >:

[legend]

List of all members.

Public Member Functions
virtual bool	frame_pending ()
	Is there a frame waiting in the buffer? This function does not block.
virtual double	frame_rate ()
	Get the camera frame rate.
virtual VideoFrame< T > *	get_frame ()
virtual void	put_frame (VideoFrame< T > *f)
virtual ImageRef	size ()
	The size of the VideoFrames returned by this buffer.
	V4L1Buffer (const std::string &dev, ImageRef size)
	V4L1Buffer (const std::string &dev)
virtual	~V4L1Buffer ()
Private Member Functions
int	operator= (V4L1Buffer &copyof)
	V4L1Buffer (V4L1Buffer &copyof)

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Detailed Description

template<class T>
class CVD::V4L1Buffer< T >

A video buffer from a v4l1 video device.

Parameters:

T

The pixel type of the frames. The supported type are <CVD::byte> which returns 8-bit grey scale and <CVD::bayer> which returns an 8-bit grey scale image containing the raw intensities of the sensor. You have to convert the returned image to a byte image or something else to use it in a meaningful way. <CVD::Rgb<CVD::byte> > should work to but crashes with my current driver ?! The pixel type used will automatically configure the underlying RawV4L1 object to use the right video palette.

Note:

The grey images are returned upside down unless the kernel module is loaded with the option flipvert.

frame_rate currently returns fixed 30 fps and frame_pending is untested.

Definition at line 184 of file v4l1buffer.h.

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Constructor & Destructor Documentation

template<class T >

CVD::V4L1Buffer< T >::V4L1Buffer

(

const std::string &

dev

)

[inline]

Construct a video buffer

Parameters:

dev

file name of the device to use

Definition at line 189 of file v4l1buffer.h.

template<class T >

CVD::V4L1Buffer< T >::V4L1Buffer	(	const std::string &	dev,
		ImageRef	size
	)			[inline]

Construct a video buffer

Parameters:

	dev	file name of the device to use
	size	Size of the video stream to grab

Definition at line 197 of file v4l1buffer.h.

template<class T >

virtual CVD::V4L1Buffer< T >::~V4L1Buffer

(

)

[inline, virtual]

Definition at line 224 of file v4l1buffer.h.

template<class T >

CVD::V4L1Buffer< T >::V4L1Buffer

(

V4L1Buffer< T > &

copyof

)

[private]

---

Member Function Documentation

template<class T >

virtual bool CVD::V4L1Buffer< T >::frame_pending

(

)

[inline, virtual]

Is there a frame waiting in the buffer? This function does not block.

Reimplemented from CVD::V4L1::RawV4L1.

Definition at line 215 of file v4l1buffer.h.

template<class T >

virtual double CVD::V4L1Buffer< T >::frame_rate

(

)

[inline, virtual]

Get the camera frame rate.

Reimplemented from CVD::V4L1::RawV4L1.

Definition at line 219 of file v4l1buffer.h.

template<class T >

virtual VideoFrame<T>* CVD::V4L1Buffer< T >::get_frame

(

)

[inline, virtual]

returns the data of the next captured frame

Reimplemented from CVD::V4L1::RawV4L1.

Definition at line 206 of file v4l1buffer.h.

template<class T >

int CVD::V4L1Buffer< T >::operator=

(

V4L1Buffer< T > &

copyof

)

[private]

template<class T >

virtual void CVD::V4L1Buffer< T >::put_frame

(

VideoFrame< T > *

f

)

[inline, virtual]

Tell the buffer that you are finished with this frame. Typically the VideoBuffer then destroys the frame.

Parameters:

f

The frame that you are finished with.

Implements CVD::VideoBuffer< T >.

Definition at line 210 of file v4l1buffer.h.

template<class T >

virtual ImageRef CVD::V4L1Buffer< T >::size

(

)

[inline, virtual]

The size of the VideoFrames returned by this buffer.

Implements CVD::RawVideoBuffer.

Definition at line 202 of file v4l1buffer.h.

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

• v4l1buffer.h