Omnimeeting: MJPEGVideoSource Class Reference

Definition at line 62 of file MJPEGVideoSource.hh.


Public Member Functions
virtual	~MJPEGVideoSource ()
Static Public Member Functions
static MJPEGVideoSource *	createNew (UsageEnvironment &env, BaseInputVideo *input_video, int stream_id=0, int frame_rate=25, int encoder_internal_buf_size=1000000)
	Static method.
Protected Member Functions
	MJPEGVideoSource (UsageEnvironment &env, BaseInputVideo *input_video, int stream_id, int frame_rate, int encoder_internal_buf_size)
	Constructor.
Private Member Functions
void	doGetNextFrame ()
	Inherited function. Used to process next frame to send.
void	deliverFrame ()
	Provides RTP encapsulation.
void	startCapture ()
	Captures a IplImage and encode it to a JPEG memory buffer.
u_int8_t	type ()
u_int8_t	qFactor ()
	Quality factor of JPEG image.
u_int8_t	width ()
	Width of image.
u_int8_t	height ()
	Height of image.
u_int8_t const *	quantizationTables (u_int8_t &precision, u_int16_t &length)
	If "qFactor()" returns a value >= 128, then this function is called to tell us the quantization tables that are being used.
int	setParamsFromHeader (const unsigned char *fJPEGHeader)
	Try to find width and height markers and grab their values.
Boolean	isJPEGVideoSource () const
	redefined virtual functions
Private Attributes
bool	_initialized
	Specify whether the class is initialized or not.
unsigned	fTimePerFrame
unsigned int	fPreferredFrameSize
	Preferred size of current frame to send.
const unsigned char *	_encoded_frame
	It will just hold the pointer of the internal_buffer of OStreamVideoEncoder.
timeval	fLastCaptureTime
	Contains the last capture time.
int	_fps
	Frames per second.
int	_frame_rate_millis
	Equals at 1000/frame_rate.
u_int8_t	fLastQFactor
	Quality factor, width and height of the jpeg image.
u_int8_t	fLastWidth
u_int8_t	fLastHeight
u_int8_t *	qTable
	Quantization tables.
int	_encoder_internal_buf_size
	Size of the internal buffer used for encoding.
int	_stream_id
	Stream id.
BaseInputVideo *	_input_video
	BaseInputVideo class instance pointer.
OStreamVideoEncoder *	_video_encoder
	OStreamVideoEncoder class instance pointer.
int	Idunno

Constructor & Destructor Documentation

MJPEGVideoSource::~MJPEGVideoSource ( ) [virtual]

Definition at line 123 of file MJPEGVideoSource.cpp.

References _encoded_frame, _initialized, _video_encoder, NULL, and qTable.

MJPEGVideoSource::MJPEGVideoSource	(	UsageEnvironment &	env,
		BaseInputVideo *	input_video,
		int	stream_id,
		int	frame_rate,
		int	encoder_internal_buf_size
	)			`[protected]`

See also:: createNew

Definition at line 36 of file MJPEGVideoSource.cpp.

References _frame_rate_millis, _initialized, _input_video, _video_encoder, BaseInputVideo::init_device(), NULL, OUTPUT_PACKET_BUFFER_MAXSIZE, and qTable.

Referenced by createNew().

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Member Function Documentation

MJPEGVideoSource * MJPEGVideoSource::createNew	(	UsageEnvironment &	env,
		BaseInputVideo *	input_video,
		int	stream_id = `0`,
		int	frame_rate = `25`,
		int	encoder_internal_buf_size = `1000000`
	)			`[static]`

Parameters:

	env	UsageEnvironment, see LiveMedia doc. here http://www.live555.com/liveMedia/public/doxygen/html
	input_video	A BaseInputVideo class, can be a MultiVideoSource or a SingleVideoSource kind of class.
	stream_id	Stream id that will identify this MJPEGVideoSource incapsulator class. It defaults to 0.
	frame_rate	Frames Per Second value. Number of frames per time unit.
	encoder_internal_buf_size	Encoder internal buffer size. Memory to alloc for encoding purposes. Defaults to 1000000.