A live video buffer which uses the Video for Linux 2 (V4L2) API. More...

#include <v4lbuffer.h>

Inheritance diagram for CVD::V4LBuffer< T >:

Collaboration diagram for CVD::V4LBuffer< T >:

Public Member Functions
	V4LBuffer (const std::string &dev, ImageRef size, int input=-1, bool fields=false, int frames_per_second=0, bool verbose=0)

virtual ImageRef	size ()
	The size of the VideoFrames returned by this buffer.

virtual VideoFrame< T > *	get_frame ()
	Returns the next frame from the buffer. This function blocks until a frame is ready.

virtual void	put_frame (VideoFrame< T > *f)
	Tell the buffer that you are finished with this frame. More...

virtual bool	frame_pending ()
	Is there a frame waiting in the buffer? This function does not block. More...

virtual double	frame_rate ()
	What is the (expected) frame rate of this video buffer, in frames per second?

int	num_buffers ()

Public Member Functions inherited from CVD::VideoBuffer< T >
	VideoBuffer (VideoBufferType::Type _type)
	Construct the buffer with the known semantics.

virtual void	flush ()
	Flush all old frames out of the video buffer, on a flushable buffer, causing the next get_frame() to sleep until a frame arrives. More...

VideoBufferType::Type	type ()
	Returns the type of the video stream. More...

Public Member Functions inherited from CVD::RawVideoBuffer
virtual RawVideoBuffer *	source_buffer ()
	Which video grabber provides the source images for this video grabber. More...

RawVideoBuffer *	root_buffer ()
	Follow the chain of video grabbers back as far as at will go. More...

virtual void	seek_to (double)
	Go to a particular point in the video buffer (only implemented in buffers of recorded video) More...

Public Member Functions inherited from CVD::V4L::RawV4LBuffer
	RawV4LBuffer (const std::string &dev, unsigned int fmt, ImageRef size, int input, bool fields, int frame_per_second, bool verbose)

ImageRef	getSize ()

Buffer	getFrame ()

void	releaseFrame (int id)

double	getRate ()

bool	pendingFrame ()

int	num_buffers ()

const std::string &	device_name () const