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use crate::{
core::{self, PlaylistDownloadConfig, Stream},
error::{Error, Result},
playlist::types::{MediaPlaylist, MediaType, PlaylistType, Segment},
progress::{Progress, ProgressCallback},
utils,
};
use log::debug;
use reqwest::header;
use std::{fmt::Display, path::PathBuf, sync::Arc};
use tokio_util::sync::CancellationToken;
use url::Url;
impl MediaPlaylist {
/// Resolves the absolute path to the local output file for this stream.
pub(crate) fn path(&self, directory: Option<&PathBuf>) -> PathBuf {
let filename = format!("vsd-{}-{}.{}", self.media_type, self.id, self.extension());
directory
.map(|d| d.join(&filename))
.unwrap_or_else(|| PathBuf::from(filename))
}
/// Extracts the default key ID (KID) in hexadecimal format if the stream is encrypted.
pub fn default_kid(&self) -> Option<String> {
self.segments
.first()
.and_then(|s| s.key.as_ref())
.and_then(|k| k.default_kid.as_ref())
.map(|kid| kid.to_ascii_lowercase().replace('-', ""))
}
/// Determines the file extension of the media segments.
///
/// Checks segment URIs, map URIs, and falls back to protocol defaults (`ts` for HLS, `mp4` for DASH).
pub fn extension(&self) -> &str {
if let Some(ext) = &self.extension {
return ext;
}
if let Some(first) = self.segments.first() {
let is_mp4 = |uri: &str| {
let path = uri.split_once('?').map_or(uri, |(p, _)| p);
path.ends_with(".mp4") || path.ends_with(".m4s")
};
if is_mp4(&first.uri) || first.map.as_ref().is_some_and(|m| is_mp4(&m.uri)) {
return "mp4";
}
}
match self.playlist_type {
PlaylistType::Hls => "ts",
PlaylistType::Dash => "mp4",
}
}
/// Downloads the media playlist segments.
///
/// Spawns a progress bar updates callback, matches the media type (video/audio vs subtitles),
/// and delegates segment downloading to the core downloader modules.
///
/// # Errors
///
/// Returns:
/// - [`Error::MissingSegments`] if the segment list is empty.
/// - [`Error::UnsupportedEncryption`] if the stream uses an unsupported encryption format.
/// - [`Error::MissingKey`] if a decryption key is required but missing.
/// - [`Error::DownloadInterrupted`] if the download is cancelled via the cancellation token.
/// - Other connection, disk I/O, or decryption errors propagated from underlying tasks.
pub async fn download(
&self,
config: &PlaylistDownloadConfig,
progress: Arc<dyn ProgressCallback>,
token: &CancellationToken,
) -> Result<Stream> {
if self.segments.is_empty() {
return Err(Error::MissingSegments);
}
let progress = Progress::new(&self.id, self.segments.len(), Some(progress));
let temp_file = if self.media_type == MediaType::Subtitles {
core::sub::download(config, progress, token, self).await?
} else {
core::vid::download(config, progress, token, self).await?
};
Ok(temp_file)
}
/// Fetches the initialization segment (typically fMP4 headers) if the stream requires one.
///
/// # Errors
///
/// Returns an error if fetching or downloading the init segment fails.
pub async fn fetch_init(&self, config: &PlaylistDownloadConfig) -> Result<Option<Vec<u8>>> {
let Some(Segment { map: Some(map), .. }) = self.segments.first() else {
return Ok(None);
};
let url = self.uri.parse::<Url>()?.join(&map.uri)?;
let mut request = config.client.get(url.clone()).query(&*config.query);
if let Some(range) = &map.range {
request = request.header(header::RANGE, range);
}
debug!(
"Fetching {} (init@{})",
url,
map.range
.as_ref()
.map(|x| format!("{}-{}", x.0, x.1))
.as_deref()
.unwrap_or("full-range")
);
let response = request.send().await?;
let bytes = utils::fetch_bytes(response).await?;
Ok(Some(bytes))
}
}
impl Display for MediaType {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
write!(
f,
"{}",
match self {
Self::Video => "vid",
Self::Audio => "aud",
Self::Subtitles => "sub",
Self::Undefined => "und",
}
)
}
}
impl MediaPlaylist {
fn fmt_bandwidth(&self) -> String {
self.bandwidth
.and_then(|b| {
let b = b / 1000;
if b > 0 { Some(format!("{}k", b)) } else { None }
})
.unwrap_or("?".to_owned())
}
fn fmt_codecs(&self) -> String {
self.codecs
.as_ref()
.map(|c| {
if c.len() > 12 {
format!("{}…", &c[..11])
} else {
c.to_owned()
}
})
.unwrap_or("?".to_owned())
}
fn fmt_language(&self) -> String {
self.language
.as_ref()
.map(|c| {
if c.len() > 10 {
format!("{}…", &c[..9])
} else {
c.to_owned()
}
})
.unwrap_or("?".to_owned())
}
/// Returns a formatted string representation of the media playlist suitable for printing in console logs or stream listings.
pub fn display(&self) -> String {
self.to_string()
.split('|')
.map(|x| x.replace(" ", ""))
.collect::<Vec<String>>()
.join(" ")
}
}
impl std::fmt::Display for MediaPlaylist {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
match self.media_type {
MediaType::Video => {
write!(
f,
"{:>9} | {:>5} | {:>12} | {:>3} fps",
self.resolution
.map(|(w, h)| format!("{}x{}", w, h))
.unwrap_or_default(),
self.fmt_bandwidth(),
self.fmt_codecs(),
self.frame_rate
.map(|f| format!("{:.0}", f))
.as_deref()
.unwrap_or("?")
)?;
if self.live {
write!(f, " | live")?;
}
}
MediaType::Audio => {
write!(
f,
"{:>9} | {:>5} | {:>12} | {:>3} ch",
self.fmt_language(),
self.fmt_bandwidth(),
self.fmt_codecs(),
self.channels
.map(|c| c.to_string())
.as_deref()
.unwrap_or("?")
)?;
if self.live {
write!(f, " | live")?;
}
}
MediaType::Subtitles => {
write!(
f,
"{:>9} | {:>5} | {:>12} |",
self.fmt_language(),
"?k",
self.fmt_codecs()
)?;
if self.live {
write!(f, " | live")?;
}
}
MediaType::Undefined => {
write!(f, "{}", self.uri)?;
}
}
Ok(())
}
}