UG-VIPSUITE	c_av_st_video_user_packet	A-27
	2015.01.23

c_av_st_video_user_packet

The declaration for the c_av_st_video_user_packet class:

class c_av_st_video_user_packet#(parameters BITS_PER_CHANNEL=8, CHANNELS_PER_PIXEL=3) extends c_av_st_video_item;

Table A-16: Method Calls for c_av_st_video_user_packet Class

Method Call		Description
function new();		Constructor.
function void copy (c_av_st_video_user_packet		Copies object c into this object.
c);
function bit compare (c_av_st_video_user_		Compares this instance to object r. Returns 1 if
packet r);		identical, 0 for otherwise.
function void set_max_length(int l);		For constrained random generation, this
		method is used to apply a maximum length to
		the user packets.
function int get_length();		—
function bit[3:0] get_identifier();		The identifier is the Avalon-ST video packet
		identifier. 0x0 indicates video, 0xf indicates a
		control packet and the user packets take
		random values from 0x4 to 0xe.
function bit [BITS_PER_CHANNEL*CHANNELS_PER_		Returns the next beat of user data.
PIXEL-1:0] pop_data();
function bit [BITS_PER_CHANNEL*CHANNELS_PER_		Returns the next beat of user data without
PIXEL-1:0] query_data(int i);;		removing it from the object.
function void push_data(bit [BITS_PER_		—
CHANNEL*CHANNELS_PER_PIXEL-1:0] d);
Table A-17: Members of c_av_st_video_user_packet Class
Member		Description
rand bit[BITS_PER_CHANNEL*CHANNELS_PER_PIXEL-		User data is stored as a queue of words.
1:0]data[$]
rand bit[3:0] identifier;		constraint c2 {identifier inside
		{[4:14]};}
int max_length = 10;		constraint c1 {data.size() inside
		{[1:max_length]};}

Avalon-ST Video Verification IP Suite	Altera Corporation

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