Altera Video and Image Processing Suite User Manual
Page 292
Method Call
Description
function void set_video_data_type(string s);
Sets the
fourcc[3]
code associated with the
raw video data. The following are the
supported four character code (FOURCC)
codes:
•
RGB32
•
IYU2
•
YUY2
•
Y410
•
A2R10GB10
•
Y210
function string get_video_data_type();
Returns the FOURCC code (for example,
RGB32
) being used for the raw video data.
function int get_video_packets_handled();
—
function int get_control_packets_handled();
—
function int get_user_packets_handled();
—
function new(mailbox #(c_av_st_video_item)m_
vid_out);
Constructor. The mailbox is used to pass all
packets in and out of the file I/O object.
function void open_file(string fname, t_rwrw);
Files are opened using this method. For
example:
video_file_reader.open_file(‘’vip_car_
0.bin”,
read);
t_rw
is an enumerated type with values read or
write.
NB. The read fails if there is no associated
.spc
file, for example,
vip_car_o.spc
).
function void close_file();
For example,
video_file_reader.close_
file();
task read_file();
Read_file()
optionally calls
send_user_
packet
() and
send_control_packet()
, then
calls
read_video_packet()
.
task send_control_packet();
The control packet sent is derived from the
image height, width, and interlace fields as
provided by
open_file()
.
task send_user_packet();
The user packet sent is always comprised of
random data and had a maximum length
hard-coded to 33 data items.
task_generate_spc_file();
When writing a file, this call creates the
necessary associated
.spc
file.
A-24
c_av_st_video_file_io
UG-VIPSUITE
2015.05.04
Altera Corporation
Avalon-ST Video Verification IP Suite