Altera Video and Image Processing Suite Uživatelský manuál stáhnout pdf (Strana 288)

Method Call Description

function t_packet_control get_append_garbage

();

—

function int get_garbage_probability (); —

function void set_width (bit [15:0] w); —

function void set_height (bit [15:0] h); —

function void set_interlacing (bit [3:0] i); —

function void set_append_garbage (t_packet_

control i);

Refer to append_garbage member.

function void set_garbage_probability (int i); —

function string info(); Returns a formatted string containing the

width, height and interlacing members.

Table A-5: Members of c_av_st_video_control Class

Member Description

rand bit[15:0] width; —

rand bit[15:0] height; —

rand bit[3:0] interlace; —

rand t_packet_control append_garbage = off; The append_garbage control is of type t_

packet_control, defined as: typedef

enum{on,off,random} t_packet_control;

rand int garbage_probability = 50; The source BFM uses garbage_probability

and append_garbage to determine whether or

not to append garbage beats to the end of the

control packets.

Garbage beats are generated with a probability

of Garbage_probability%.

• When a stream of garbage is being

generated, the probability that the stream

terminates is fixed in the source BFM at

10%.

• When garbage is produced, this typically

produces around 1 to 30 beats of garbage

per control packet.

A-20

c_av_st_video_control

UG-VIPSUITE

2015.05.04

Altera Corporation

Avalon-ST Video Verification IP Suite

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Altera Video and Image Processing Suite Uživatelský manuál Strana 288