A video buffer from a Firewire (IEEE 1394) camera. More...

#include <dvbuffer.h>

Inheritance diagram for CVD::DVBuffer2< T >:

Collaboration diagram for CVD::DVBuffer2< T >:

Public Member Functions
	DVBuffer2 (int cam_no, int num_dma_buffers, int bright=-1, int exposure=-1, double fps=DC::cam_type< T >::fps)
	Construct a video buffer. More...

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

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 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::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...

Public Member Functions inherited from CVD::DC::RawDCVideo
	RawDCVideo (int camera_no, int num_dma_buffers, int bright, int exposure, int mode, double frame_rate)
	Construct a video buffer. More...

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

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

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

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

void	set_shutter (unsigned int s)
	Set the camera shutter speed. More...

unsigned int	get_shutter ()
	Get the camera shutter speed.

void	set_iris (unsigned int i)
	Set the camera iris. More...

unsigned int	get_iris ()
	Get the camera iris.

void	set_sharpness (unsigned int s)
	Set the camera sharpness. More...

unsigned int	get_sharpness ()
	Get the camera sharpness.

void	set_gain (unsigned int g)
	Set the camera gain. More...

unsigned int	get_gain ()
	Get the camera gain.

void	set_exposure (unsigned int e)
	Set the camera exposure. More...

unsigned int	get_exposure ()
	Get the camera exposure.

void	set_brightness (unsigned int b)
	Set the camera brightness. More...

unsigned int	get_brightness ()
	Get the camera brightness.

void	set_feature_value (unsigned int feature, unsigned int value)
	Set any DC1394 camera feature value. More...

unsigned int	get_feature_value (unsigned int feature)
	Get any DC1394 camera feature value. More...

std::pair< unsigned int, unsigned int >	get_feature_min_max (unsigned int feature)
	Get the min and max value of any camera feature. More...

void	auto_on_off (unsigned int feature, unsigned int auto_value)
	Toggle auto on or off. More...

double	frame_rate ()
	Get the camera frame rate.

raw1394handle_t &	handle ()
	What is the handle for this device?

nodeid_t &	node ()
	Which node is this device on?

Detailed Description

template<class T>
class CVD::DVBuffer2< T >

A video buffer from a Firewire (IEEE 1394) camera.

The requested image format depends on the templated pixel type. Frames of size 640 by 480 pixels are requested, at 30fps (except for CVD::Rgb<CVD::byte>, which is 15fps).

Parameters

T	The pixel type of the frames. Currently only `<CVD::Rgb<CVD::byte> >` `CVD::yuv411>` and `CVD::byte>` are supported.

Constructor & Destructor Documentation

◆ DVBuffer2()

template<class T >

CVD::DVBuffer2< T >::DVBuffer2	(	int	cam_no,
		int	num_dma_buffers,
		int	bright = `-1`,
		int	exposure = `-1`,
		double	fps = `DC::cam_type<T>::fps`
	)

inline

Construct a video buffer.

Parameters

cam_no	The camera number (the first camera is 0)
num_dma_buffers	The number of DMA buffers to use (at least 3 is recommended)
bright	The brightness correction (default = -1 = automatic)
exposure	The exposure correction (default = -1 = automatic)
fps	The number of frames per second (default = 30fps)

Member Function Documentation

◆ frame_pending()

template<class T >

virtual bool CVD::DVBuffer2< T >::frame_pending ( )

inlinevirtual

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

See is_live and is_flushable.

Implements CVD::RawVideoBuffer.

◆ put_frame()

template<class T >

virtual void CVD::DVBuffer2< T >::put_frame ( VideoFrame< T > * f )

inlinevirtual

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 >.

◆ seek_to()

template<class T >

virtual void CVD::DVBuffer2< T >::seek_to ( double )

inlinevirtual

Go to a particular point in the video buffer (only implemented in buffers of recorded video)

Parameters

t	The frame time in seconds

Reimplemented from CVD::RawVideoBuffer.

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

cvd/Linux/dvbuffer.h

Public Member Functions

Detailed Description

template<class T> class CVD::DVBuffer2< T >

Constructor & Destructor Documentation

◆ DVBuffer2()

Member Function Documentation

◆ frame_pending()

◆ put_frame()

◆ seek_to()

template<class T>
class CVD::DVBuffer2< T >