UG-VIPSUITE			c_av_st_video_item	A-23
2015.01.23
	Member		Description
	rand t_packet_control send_garbage_after_		—
	control_packets = off;
	rand int early_eop_packet_length = 20;		constraint early_eop_length { early_
			eop_packet_length dist {1:= 10,
			[2:image_height*image_width-1]:/90};
			early_eop_packet_length inside
			{[1:image_height*image_width]}; }
	rand int late_eop_packet_length = 20;		constraint late_eop_length { late_eop_
			packet_length inside {[1:100]}; }

c_av_st_video_item

The declaration for the c_av_st_video_item class:

class c_av_st_video_item;

Table A-10: Method Calls for c_av_st_video_item Class

Method Call			Description
function new();		Constructor
function void copy (c_av_st_video_item c);		Sets this.packet_type to match that of c.
function void set_packet_type (t_packet_types			—
ptype);
function t_packet_typesget_packet_type();			—
Table A-11: Members of c_av_st_video_item Class
Member			Description
t_packet_types packet_type;		Packet_type must be one of the following:
		•	video_packet
		•	control_packet
		•	user_packet
		•	generic_packet
		•	undefined

c_av_st_video_source_sink_base

The declaration for the c_av_st_video_source_sink_base class:

class c_av_st_video_source_sink_base;

Avalon-ST Video Verification IP Suite	Altera Corporation

Send Feedback

	A-24		c_av_st_video_source_sink_base		UG-VIPSUITE
				2015.01.23
		Table A-12: Method Calls for c_av_st_video_source_sink_base Class
			Method Call		Description
			function new(mailbox #(c_av_st_video_item)m_		Constructor. The video source and sink classes
			vid);		transfer video objects through their mailboxes.
			function void set_readiness_probability(int		—
			percentage);
			function int get_readiness_probability();		—
			function void set_long_delay_probability(real		—
			percentage);
			function real get_long_delay_probability();		—
			function void set_long_delay_duration_min_		—
			beats(int percentage);
			function int get_long_delay_duration_min_		—
			beats();
			function void set_long_delay_duration_max_		—
			beats(int percentage);
			function int get_long_delay_duration_max_		—
			beats();
			function void set_pixel_transport(t_pixel_		—
			format in_parallel);
			function t_pixel_format get_pixel_transport();		—
			function void set_name(string s);		—
			function string get_name();		—
		Table A-13: Members of c_av_st_video_source_sink_base Class
			Member		Description
			mailbox # (c_av_st_video_item) m_video_items=		The Avalon-ST video standard allows you to
			new(0);		send symbols in serial or parallel format. You
					can set this control to either format.
			t_pixel_format pixel_transport = parallel;		—
			string name = "undefined";		—
			int video_packets_sent = 0;		—
			int control_packets_sent = 0;		—
			int user_packets_sent = 0;		—

Altera Corporation	Avalon-ST Video Verification IP Suite

Send Feedback

UG-VIPSUITE			c_av_st_video_sink_bfm_’SINK	A-25
2015.01.23
	Member		Description
	int readiness_probability = 80;		Determines the probability of when a sink or
			source is ready to receive or send data in any
			given clock cycle, as manifested on the bus by
			the READY and VALID signals, respectively.
	real long_delay_probability = 0.01;		• The readiness_probability control
			provides a steady state readiness condition.
			• The long_delay_probability allows for
			the possibility of a much rarer and longer
			period of unreadiness, of durations of the
			order of the raster line period or even field
			period.
	rand int long_delay_duration_min_beats= 100;		This control sets the minimum duration (as
			measured in data beats of) a long delay.
			Note: If pixel_transport = parallel than
			one data beats = one pixel = one
			clock cycle.
	rand int long_delay_duration_max_beats = 1000;		This control sets the maximum duration (as
			measured in data beats) of a long delay.
	rand int long_delay_duration = 80;		constraint c1 {long_delay_duration
			inside [long_delay_duration_min_beats:
			long_delay_duration_max_beats]};}

c_av_st_video_sink_bfm_’SINK

The declaration for the c_av_st_video_sink_bfm_’SINK class:

‘define CLASSNAME c_av_st_video_sink_bfm_’SINK;

class ‘CLASSNAME extends c_av_st_video_source_sink_base;

Table A-14: Method Calls for c_av_st_video_sink_bfm_’SINK Class

This class does not have additional members to those of the base class.

Method Call		Description
function new(mailbox#(c_av_st_video_item)m_		Constructor.
vid);
task start;		The start method simply waits until the reset
		of the Avalon-ST sink BFM goes inactive, then
		calls the receive_video()task.

Avalon-ST Video Verification IP Suite	Altera Corporation

Send Feedback

	A-26	c_av_st_video_source_bfm_’SOURCE	UG-VIPSUITE
			2015.01.23

Method Call		Description
task receive_video;		The receive_video task continually drives
		the Avalon-ST sink BFM’s ready signal in
		accordance with the probability settings in the
		base class. It also continually captures signal_
		received_transaction events from the
		Avalon-ST sink BFM and uses the Avalon-ST
		sink BFM API to read bus data.
		Bus data is decoded according to the Avalon-
		ST video specification and data is packed into
		an object of the appropriate type (video,
		control or, user). The object is then put into
		the mailbox.

c_av_st_video_source_bfm_’SOURCE

The declaration for the c_av_st_video_source_bfm_’SOURCE class:

‘define CLASSNAME c_av_st_video_source_bfm_’SOURCE

class ‘CLASSNAME extends c_av_st_video_source_sink_base;

Table A-15: Method Calls for c_av_st_video_source_bfm_’SOURCE Class

This class does not have additional members to those of the base class.

Method Call		Description
function new(mailbox#(c_av_st_video_item)m_		Constructor.
vid)
task start;		The start method simply waits until the reset
		of the Avalon-ST source BFM goes inactive,
		then continually calls the send_video() task.
task send_video;		The send_video() task waits until a video
		item is put into the mailbox, then it drives the
		Avalon-ST sink BFM's API accordingly.
		The set_transaction_idles() call is used to
		set the valid signal in accordance with the
		probability settings in the base class. The
		mailbox object is categorized according to
		object type.
		Each object is presented to the bus according
		to the Avalon-ST Video specification and the
		setting of the pixel_transport control.

Altera Corporation	Avalon-ST Video Verification IP Suite

Send Feedback