gst-plugins-rs/video/closedcaption/tests/cea708mux.rs

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// Copyright (C) 2023 Matthew Waters <matthew@centricular.com>
//
// This Source Code Form is subject to the terms of the Mozilla Public License, v2.0.
// If a copy of the MPL was not distributed with this file, You can obtain one at
// <https://mozilla.org/MPL/2.0/>.
//
// SPDX-License-Identifier: MPL-2.0
use gst::prelude::*;
use pretty_assertions::assert_eq;
use cea708_types::tables::*;
use cea708_types::*;
fn init() {
use std::sync::Once;
static INIT: Once = Once::new();
INIT.call_once(|| {
gst::init().unwrap();
gstrsclosedcaption::plugin_register_static().unwrap();
});
}
fn gen_cc_data(seq: u8, service: u8, codes: &[Code]) -> gst::Buffer {
assert!(seq < 4);
assert!(service < 64);
let fps = Framerate::new(30, 1);
let mut writer = CCDataWriter::default();
let mut packet = DTVCCPacket::new(seq);
let mut service = Service::new(service);
for c in codes {
service.push_code(c).unwrap();
}
packet.push_service(service).unwrap();
writer.push_packet(packet);
let mut data = vec![];
writer.write(fps, &mut data).unwrap();
let data = data.split_off(2);
let mut buf = gst::Buffer::from_mut_slice(data);
{
let buf = buf.get_mut().unwrap();
buf.set_pts(0.nseconds());
}
buf
}
fn cc_data_to_cea708_types(cc_data: &[u8]) -> Vec<u8> {
let mut ret = vec![0; 2];
ret[0] = 0x80 | 0x40 | ((cc_data.len() / 3) & 0x1f) as u8;
ret[1] = 0xFF;
ret.extend(cc_data);
ret
}
#[test]
fn test_cea708mux_single_buffer_cc_data() {
init();
let mut h = gst_check::Harness::with_padnames("cea708mux", Some("sink_0"), Some("src"));
h.set_src_caps_str("closedcaption/x-cea-708,format=cc_data,framerate=60/1");
let buf = gen_cc_data(0, 1, &[Code::LatinCapitalA]);
h.push(buf).unwrap();
let mut parser = CCDataParser::new();
let out = h.pull().unwrap();
let readable = out.map_readable().unwrap();
let cc_data = cc_data_to_cea708_types(&readable);
parser.push(&cc_data).unwrap();
let parsed_packet = parser.pop_packet().unwrap();
assert_eq!(parsed_packet.sequence_no(), 0);
let services = parsed_packet.services();
assert_eq!(services.len(), 1);
assert_eq!(services[0].number(), 1);
let codes = services[0].codes();
assert_eq!(codes.len(), 1);
assert_eq!(codes[0], Code::LatinCapitalA);
}
#[test]
fn test_cea708mux_2pads_cc_data() {
init();
let mut h = gst_check::Harness::with_padnames("cea708mux", None, Some("src"));
let mut sink_0 = gst_check::Harness::with_element(&h.element().unwrap(), Some("sink_0"), None);
sink_0.set_src_caps_str("closedcaption/x-cea-708,format=cc_data,framerate=60/1");
let mut sink_1 = gst_check::Harness::with_element(&h.element().unwrap(), Some("sink_1"), None);
sink_1.set_src_caps_str("closedcaption/x-cea-708,format=cc_data,framerate=60/1");
let buf = gen_cc_data(0, 1, &[Code::LatinLowerA]);
sink_0.push(buf).unwrap();
let buf = gen_cc_data(0, 2, &[Code::LatinCapitalA]);
sink_1.push(buf).unwrap();
let mut parser = CCDataParser::new();
let out = h.pull().unwrap();
let readable = out.map_readable().unwrap();
let mut cc_data = vec![0; 2];
cc_data[0] = 0x80 | 0x40 | ((readable.len() / 3) & 0x1f) as u8;
cc_data[1] = 0xFF;
cc_data.extend(readable.iter());
parser.push(&cc_data).unwrap();
let parsed_packet = parser.pop_packet().unwrap();
assert_eq!(parsed_packet.sequence_no(), 0);
let services = parsed_packet.services();
assert_eq!(services.len(), 2);
// TODO: deterministic service ordering?
if services[0].number() == 1 {
let codes = services[0].codes();
assert_eq!(codes.len(), 1);
assert_eq!(codes[0], Code::LatinLowerA);
assert_eq!(services[1].number(), 2);
let codes = services[1].codes();
assert_eq!(codes.len(), 1);
assert_eq!(codes[0], Code::LatinCapitalA);
} else if services[0].number() == 2 {
let codes = services[0].codes();
assert_eq!(codes.len(), 1);
assert_eq!(codes[0], Code::LatinCapitalA);
assert_eq!(services[1].number(), 1);
let codes = services[1].codes();
assert_eq!(codes.len(), 1);
assert_eq!(codes[0], Code::LatinLowerA);
} else {
unreachable!();
}
}