mirror of
https://github.com/sile/hls_m3u8.git
synced 2024-06-10 01:09:27 +00:00
170 lines
4.6 KiB
Rust
170 lines
4.6 KiB
Rust
use std::fmt;
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use std::ops::{Deref, DerefMut};
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use std::str::FromStr;
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use crate::attribute::AttributePairs;
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use crate::types::{ProtocolVersion, StreamInf};
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use crate::utils::{quote, tag, unquote};
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use crate::{Error, RequiredVersion};
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/// # [4.3.5.3. EXT-X-I-FRAME-STREAM-INF]
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/// The [`ExtXIFrameStreamInf`] tag identifies a [`Media Playlist`] file,
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/// containing the I-frames of a multimedia presentation.
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///
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/// I-frames are encoded video frames, whose decoding
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/// does not depend on any other frame.
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///
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/// [`Master Playlist`]: crate::MasterPlaylist
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/// [`Media Playlist`]: crate::MediaPlaylist
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/// [4.3.5.3. EXT-X-I-FRAME-STREAM-INF]: https://tools.ietf.org/html/rfc8216#section-4.3.4.5
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#[derive(PartialOrd, Debug, Clone, PartialEq, Eq, Hash)]
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pub struct ExtXIFrameStreamInf {
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uri: String,
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stream_inf: StreamInf,
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}
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impl ExtXIFrameStreamInf {
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pub(crate) const PREFIX: &'static str = "#EXT-X-I-FRAME-STREAM-INF:";
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/// Makes a new [`ExtXIFrameStreamInf`] tag.
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///
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/// # Example
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/// ```
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/// # use hls_m3u8::tags::ExtXIFrameStreamInf;
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/// let stream = ExtXIFrameStreamInf::new("https://www.example.com", 20);
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/// ```
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pub fn new<T: ToString>(uri: T, bandwidth: u64) -> Self {
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ExtXIFrameStreamInf {
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uri: uri.to_string(),
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stream_inf: StreamInf::new(bandwidth),
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}
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}
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/// Returns the `URI`, that identifies the associated [`media playlist`].
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///
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/// # Example
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/// ```
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/// # use hls_m3u8::tags::ExtXIFrameStreamInf;
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/// let stream = ExtXIFrameStreamInf::new("https://www.example.com", 20);
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/// assert_eq!(stream.uri(), &"https://www.example.com".to_string());
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/// ```
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///
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/// [`media playlist`]: crate::MediaPlaylist
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pub const fn uri(&self) -> &String { &self.uri }
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/// Sets the `URI`, that identifies the associated [`media playlist`].
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///
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/// # Example
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/// ```
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/// # use hls_m3u8::tags::ExtXIFrameStreamInf;
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/// #
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/// let mut stream = ExtXIFrameStreamInf::new("https://www.example.com", 20);
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///
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/// stream.set_uri("../new/uri");
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/// assert_eq!(stream.uri(), &"../new/uri".to_string());
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/// ```
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///
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/// [`media playlist`]: crate::MediaPlaylist
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pub fn set_uri<T: ToString>(&mut self, value: T) -> &mut Self {
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self.uri = value.to_string();
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self
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}
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}
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/// This tag requires [`ProtocolVersion::V1`].
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impl RequiredVersion for ExtXIFrameStreamInf {
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fn required_version(&self) -> ProtocolVersion { ProtocolVersion::V1 }
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}
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impl fmt::Display for ExtXIFrameStreamInf {
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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write!(f, "{}", Self::PREFIX)?;
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write!(f, "URI={},{}", quote(&self.uri), self.stream_inf)?;
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Ok(())
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}
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}
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impl FromStr for ExtXIFrameStreamInf {
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type Err = Error;
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fn from_str(input: &str) -> Result<Self, Self::Err> {
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let input = tag(input, Self::PREFIX)?;
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let mut uri = None;
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for (key, value) in input.parse::<AttributePairs>()? {
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if let "URI" = key.as_str() {
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uri = Some(unquote(value));
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}
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}
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let uri = uri.ok_or_else(|| Error::missing_value("URI"))?;
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Ok(Self {
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uri,
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stream_inf: input.parse()?,
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})
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}
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}
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impl Deref for ExtXIFrameStreamInf {
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type Target = StreamInf;
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fn deref(&self) -> &Self::Target { &self.stream_inf }
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}
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impl DerefMut for ExtXIFrameStreamInf {
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fn deref_mut(&mut self) -> &mut Self::Target { &mut self.stream_inf }
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}
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#[cfg(test)]
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mod test {
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use super::*;
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#[test]
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fn test_display() {
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assert_eq!(
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ExtXIFrameStreamInf::new("foo", 1000).to_string(),
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"#EXT-X-I-FRAME-STREAM-INF:URI=\"foo\",BANDWIDTH=1000".to_string()
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);
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}
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#[test]
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fn test_parser() {
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assert_eq!(
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"#EXT-X-I-FRAME-STREAM-INF:URI=\"foo\",BANDWIDTH=1000"
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.parse::<ExtXIFrameStreamInf>()
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.unwrap(),
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ExtXIFrameStreamInf::new("foo", 1000)
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);
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assert!("garbage".parse::<ExtXIFrameStreamInf>().is_err());
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}
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#[test]
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fn test_required_version() {
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assert_eq!(
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ExtXIFrameStreamInf::new("foo", 1000).required_version(),
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ProtocolVersion::V1
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);
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}
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#[test]
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fn test_deref() {
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assert_eq!(
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ExtXIFrameStreamInf::new("https://www.example.com", 20).average_bandwidth(),
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None
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)
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}
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#[test]
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fn test_deref_mut() {
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assert_eq!(
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ExtXIFrameStreamInf::new("https://www.example.com", 20)
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.set_average_bandwidth(Some(4))
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.average_bandwidth(),
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Some(4)
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)
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}
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}
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