gst-plugins-rs/video/closedcaption/tests/scc_parse.rs
2020-04-05 19:10:47 +00:00

203 lines
6 KiB
Rust

// Copyright (C) 2019 Sebastian Dröge <sebastian@centricular.com>
// Copyright (C) 2019 Jordan Petridis <jordan@centricular.com>
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Library General Public
// License as published by the Free Software Foundation; either
// version 2 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Library General Public License for more details.
//
// You should have received a copy of the GNU Library General Public
// License along with this library; if not, write to the
// Free Software Foundation, Inc., 51 Franklin Street, Suite 500,
// Boston, MA 02110-1335, USA.
#[macro_use]
extern crate pretty_assertions;
use gst::prelude::*;
use gst_video::{ValidVideoTimeCode, VideoTimeCode};
use rand::{Rng, SeedableRng};
use std::collections::VecDeque;
fn init() {
use std::sync::Once;
static INIT: Once = Once::new();
INIT.call_once(|| {
gst::init().unwrap();
gstrsclosedcaption::plugin_register_static().unwrap();
});
}
/// Randomized test passing buffers of arbitrary sizes to the parser
#[test]
fn test_parse() {
init();
let mut data = include_bytes!("dn2018-1217.scc").as_ref();
let mut rnd = if let Ok(seed) = std::env::var("SCC_PARSE_TEST_SEED") {
rand::rngs::SmallRng::seed_from_u64(
seed.parse::<u64>()
.expect("SCC_PARSE_TEST_SEED has to contain a 64 bit integer seed"),
)
} else {
let seed = rand::random::<u64>();
println!("seed {}", seed);
rand::rngs::SmallRng::seed_from_u64(seed)
};
let mut h = gst_check::Harness::new("sccparse");
h.set_src_caps_str("application/x-scc");
let mut input_len = 0;
let mut output_len = 0;
let mut checksum = 0u32;
while !data.is_empty() {
let l = if data.len() == 1 {
1
} else {
rnd.gen_range(1, data.len())
};
let buf = gst::Buffer::from_mut_slice(Vec::from(&data[0..l]));
input_len += buf.get_size();
assert_eq!(h.push(buf), Ok(gst::FlowSuccess::Ok));
while let Some(buf) = h.try_pull() {
output_len += buf.get_size();
checksum = checksum.wrapping_add(
buf.map_readable()
.unwrap()
.iter()
.fold(0u32, |s, v| s.wrapping_add(*v as u32)),
);
}
data = &data[l..];
}
h.push_event(gst::Event::new_eos().build());
while let Some(buf) = h.try_pull() {
output_len += buf.get_size();
checksum = checksum.wrapping_add(
buf.map_readable()
.unwrap()
.iter()
.fold(0u32, |s, v| s.wrapping_add(*v as u32)),
);
}
assert_eq!(input_len, 241_152);
assert_eq!(output_len, 89084);
assert_eq!(checksum, 12_554_799);
let caps = h
.get_sinkpad()
.expect("harness has no sinkpad")
.get_current_caps()
.expect("pad has no caps");
assert_eq!(
caps,
gst::Caps::builder("closedcaption/x-cea-608")
.field("format", &"raw")
.field("framerate", &gst::Fraction::new(30000, 1001))
.build()
);
}
/// Test that ensures timecode parsing is the expected one
#[test]
fn test_timecodes() {
use std::convert::TryInto;
use std::str::FromStr;
init();
let data = include_bytes!("timecodes-cut-down-sample.scc").as_ref();
let mut h = gst_check::Harness::new("sccparse");
h.set_src_caps_str("application/x-scc");
let timecodes = [
"00:00:00;00",
"00:00:14;01",
"00:00:17;26",
"00:00:19;01",
"00:00:21;02",
"00:00:23;10",
"00:00:25;18",
"00:00:28;13",
"00:00:30;29",
"00:00:34;29",
"00:00:37;27",
"00:00:40;01",
"00:00:43;27",
"00:00:45;13",
"00:00:49;16",
"00:58:51;01",
"00:58:52;29",
"00:58:55;00",
"00:59:00;25",
];
let mut valid_timecodes: VecDeque<ValidVideoTimeCode> = timecodes
.iter()
.map(|s| {
let mut t = VideoTimeCode::from_str(s).unwrap();
t.set_fps(gst::Fraction::new(30000, 1001));
t.set_flags(gst_video::VideoTimeCodeFlags::DROP_FRAME);
t
})
.map(|t| t.try_into().unwrap())
.collect();
let mut output_len = 0;
let mut checksum = 0u32;
let mut expected_timecode = valid_timecodes.pop_front().unwrap();
let buf = gst::Buffer::from_mut_slice(Vec::from(&data[..]));
assert_eq!(h.push(buf), Ok(gst::FlowSuccess::Ok));
while let Some(buf) = h.try_pull() {
output_len += buf.get_size();
checksum = checksum.wrapping_add(
buf.map_readable()
.unwrap()
.iter()
.fold(0u32, |s, v| s.wrapping_add(*v as u32)),
);
// get the timecode of the buffer
let tc = buf
.get_meta::<gst_video::VideoTimeCodeMeta>()
.expect("No timecode meta")
.get_tc();
// if the timecode matches one of expected codes,
// pop the valid_timecodes deque and set expected_timecode,
// to the next timecode.
if Some(&tc) == valid_timecodes.front() {
expected_timecode = valid_timecodes.pop_front().unwrap();
}
assert_eq!(tc, expected_timecode);
expected_timecode.increment_frame();
}
assert_eq!(output_len, 1268);
assert_eq!(checksum, 174_295);
let caps = h
.get_sinkpad()
.expect("harness has no sinkpad")
.get_current_caps()
.expect("pad has no caps");
assert_eq!(
caps,
gst::Caps::builder("closedcaption/x-cea-608")
.field("format", &"raw")
.field("framerate", &gst::Fraction::new(30000, 1001))
.build()
);
}