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use crate::utils;
use reqwest::blocking::Client;
use std::iter::Iterator;
use std::sync::Arc;
pub struct LivePlaylist {
uri: String,
client: Arc<Client>,
record_duration: Option<f32>,
pub recorded_duration: f32,
last_segment: m3u8_rs::MediaSegment,
first: bool,
}
impl LivePlaylist {
pub fn new(uri: &str, client: Arc<Client>, record_duration: Option<f32>) -> Self {
Self {
uri: uri.to_owned(),
client,
record_duration,
recorded_duration: 0.0,
last_segment: m3u8_rs::MediaSegment::default(),
first: true,
}
}
}
impl Iterator for LivePlaylist {
type Item = Result<m3u8_rs::MediaPlaylist, String>;
fn next(&mut self) -> Option<Self::Item> {
let fetch = || -> Result<Vec<u8>, reqwest::Error> {
Ok(self.client.get(&self.uri).send()?.bytes()?.to_vec())
};
loop {
match fetch() {
Ok(bytes) => {
if let Ok(playlist) = m3u8_rs::parse_playlist_res(&bytes) {
if let m3u8_rs::Playlist::MediaPlaylist(media) = playlist {
if self.first {
if let Some(record_duration) = self.record_duration {
for (i, segment) in media.segments.iter().enumerate() {
let new_recorded_duration =
self.recorded_duration + segment.duration;
if new_recorded_duration > record_duration {
if i == 0 {
return None;
} else {
let mut media_clone = media.clone();
media_clone.segments =
media.segments[0..i].to_vec();
self.last_segment =
media.segments.last().unwrap().to_owned();
return Some(Ok(media_clone));
}
} else {
self.recorded_duration =
self.recorded_duration + segment.duration;
}
}
}
if media.segments.is_empty() {
return None;
}
self.last_segment = media.segments.last().unwrap().to_owned();
self.first = false;
return Some(Ok(media));
}
if media.segments.last() == Some(&self.last_segment) {
std::thread::sleep(std::time::Duration::from_secs_f32(
media.target_duration,
));
continue;
}
if let Some(new_list) = media
.segments
.split(|x| *x.uri == self.last_segment.uri)
.nth(1)
{
if new_list.is_empty() {
std::thread::sleep(std::time::Duration::from_secs_f32(
media.target_duration,
));
continue;
}
let mut media_clone = media.clone();
if let Some(record_duration) = self.record_duration {
for (i, segment) in new_list.iter().enumerate() {
let new_recorded_duration =
self.recorded_duration + segment.duration;
if new_recorded_duration > record_duration {
if i == 0 {
return None;
} else {
media_clone.segments =
media.segments[0..i].to_vec();
self.last_segment =
media_clone.segments.last().unwrap().to_owned();
return Some(Ok(media_clone));
}
} else {
self.recorded_duration =
self.recorded_duration + segment.duration;
}
}
}
media_clone.segments =
new_list.iter().map(|x| x.to_owned()).collect();
if media_clone.segments.is_empty() {
return None;
}
self.last_segment = media_clone.segments.last().unwrap().to_owned();
return Some(Ok(media_clone));
} else {
std::thread::sleep(std::time::Duration::from_secs_f32(
media.target_duration,
));
continue;
}
} else {
return Some(Err("Media playlist not found.".to_owned()));
}
} else {
return Some(Err(format!("Couldn't parse {} playlist.", self.uri)));
}
}
Err(e) => {
if let Err(e) = utils::check_reqwest_error(&e, &self.uri) {
return Some(Err(format!("{}", e)));
} else {
continue;
}
}
}
}
}
}