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

273 lines
7.3 KiB
Rust

// Copyright (C) 2019 Sebastian Dröge <sebastian@centricular.com>
// Copyright (C) 2019 Jordan Petridis <jordan@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
#![allow(clippy::single_match)]
use gst::prelude::*;
use gst::EventView;
use gst_video::{ValidVideoTimeCode, VideoTimeCode};
use pretty_assertions::assert_eq;
use rand::{Rng, SeedableRng};
use std::collections::VecDeque;
use std::path::PathBuf;
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.size();
assert_eq!(h.push(buf), Ok(gst::FlowSuccess::Ok));
while let Some(buf) = h.try_pull() {
output_len += buf.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::Eos::new());
while let Some(buf) = h.try_pull() {
output_len += buf.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
.sinkpad()
.expect("harness has no sinkpad")
.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() {
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 = s.parse::<VideoTimeCode>().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.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
.meta::<gst_video::VideoTimeCodeMeta>()
.expect("No timecode meta")
.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
.sinkpad()
.expect("harness has no sinkpad")
.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]
fn test_pull() {
init();
let mut path = PathBuf::from(env!("CARGO_MANIFEST_DIR"));
path.push("tests/dn2018-1217.scc");
let mut h = gst_check::Harness::new_parse(&format!("filesrc location={path:?} ! sccparse"));
h.play();
/* Let's first pull until EOS */
loop {
let mut done = false;
while h.events_in_queue() != 0 {
let event = h.pull_event();
if let Ok(event) = event {
match event.view() {
EventView::Eos(_) => {
done = true;
break;
}
_ => (),
}
}
}
while h.buffers_in_queue() != 0 {
let _ = h.pull();
}
if done {
break;
}
}
/* Now seek and check that we receive buffers with appropriate PTS */
h.push_upstream_event(gst::event::Seek::new(
1.0,
gst::SeekFlags::FLUSH,
gst::SeekType::Set,
18.seconds(),
gst::SeekType::Set,
19.seconds(),
));
loop {
let mut done = false;
while h.buffers_in_queue() != 0 {
if let Ok(buffer) = h.pull() {
let pts = buffer.pts().unwrap();
let end_time = pts + buffer.duration().unwrap();
assert!(end_time >= 18.seconds() && pts < 19.seconds());
}
}
while h.events_in_queue() != 0 {
let event = h.pull_event();
if let Ok(event) = event {
match event.view() {
EventView::Eos(_) => {
done = true;
break;
}
_ => (),
}
}
}
if done {
break;
}
}
}