mirror of
https://github.com/sile/hls_m3u8.git
synced 2024-06-01 07:08:07 +00:00
160 lines
5 KiB
Rust
160 lines
5 KiB
Rust
use std::fmt;
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use std::str::FromStr;
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use getset::{Getters, MutGetters, Setters};
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use crate::attribute::AttributePairs;
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use crate::types::{DecimalResolution, HdcpLevel, ProtocolVersion};
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use crate::utils::parse_u64;
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use crate::utils::{quote, tag, unquote};
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use crate::Error;
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/// [4.3.4.3. EXT-X-I-FRAME-STREAM-INF]
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///
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/// [4.3.4.3. EXT-X-I-FRAME-STREAM-INF]: https://tools.ietf.org/html/rfc8216#section-4.3.4.3
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#[derive(Getters, Setters, MutGetters, Debug, Clone, PartialEq, Eq, Hash)]
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#[get = "pub"]
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#[set = "pub"]
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#[get_mut = "pub"]
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pub struct ExtXIFrameStreamInf {
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/// The URI, that identifies the associated media playlist.
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uri: String,
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/// The peak segment bit rate of the variant stream.
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bandwidth: u64,
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/// The average segment bit rate of the variant stream.
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average_bandwidth: Option<u64>,
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/// A string that represents the list of codec types contained the variant stream.
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codecs: Option<String>,
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/// The optimal pixel resolution at which to display all the video in the variant stream.
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resolution: Option<DecimalResolution>,
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/// The HDCP level of the variant stream.
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hdcp_level: Option<HdcpLevel>,
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/// The group identifier for the video in the variant stream.
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video: Option<String>,
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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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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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bandwidth,
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average_bandwidth: None,
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codecs: None,
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resolution: None,
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hdcp_level: None,
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video: None,
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}
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}
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/// Returns the protocol compatibility version that this tag requires.
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pub const fn requires_version(&self) -> ProtocolVersion {
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ProtocolVersion::V1
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}
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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))?;
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write!(f, ",BANDWIDTH={}", self.bandwidth)?;
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if let Some(value) = &self.average_bandwidth {
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write!(f, ",AVERAGE-BANDWIDTH={}", value)?;
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}
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if let Some(value) = &self.codecs {
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write!(f, ",CODECS={}", quote(value))?;
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}
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if let Some(value) = &self.resolution {
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write!(f, ",RESOLUTION={}", value)?;
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}
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if let Some(value) = &self.hdcp_level {
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write!(f, ",HDCP-LEVEL={}", value)?;
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}
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if let Some(value) = &self.video {
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write!(f, ",VIDEO={}", quote(value))?;
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}
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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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let mut bandwidth = None;
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let mut average_bandwidth = None;
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let mut codecs = None;
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let mut resolution = None;
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let mut hdcp_level = None;
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let mut video = None;
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for (key, value) in input.parse::<AttributePairs>()? {
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match key.as_str() {
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"URI" => uri = Some(unquote(value)),
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"BANDWIDTH" => bandwidth = Some(parse_u64(value)?),
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"AVERAGE-BANDWIDTH" => average_bandwidth = Some(parse_u64(value)?),
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"CODECS" => codecs = Some(unquote(value)),
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"RESOLUTION" => resolution = Some(value.parse()?),
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"HDCP-LEVEL" => hdcp_level = Some(value.parse()?),
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"VIDEO" => video = Some(unquote(value)),
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_ => {
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// [6.3.1. General Client Responsibilities]
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// > ignore any attribute/value pair with an unrecognized AttributeName.
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}
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}
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}
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let uri = uri.ok_or(Error::missing_value("URI"))?;
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let bandwidth = bandwidth.ok_or(Error::missing_value("BANDWIDTH"))?;
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Ok(ExtXIFrameStreamInf {
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uri,
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bandwidth,
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average_bandwidth,
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codecs,
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resolution,
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hdcp_level,
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video,
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})
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}
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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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let text = r#"#EXT-X-I-FRAME-STREAM-INF:URI="foo",BANDWIDTH=1000"#;
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assert_eq!(ExtXIFrameStreamInf::new("foo", 1000).to_string(), text);
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}
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#[test]
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fn test_parser() {
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let text = r#"#EXT-X-I-FRAME-STREAM-INF:URI="foo",BANDWIDTH=1000"#;
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let i_frame_stream_inf = ExtXIFrameStreamInf::new("foo", 1000);
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assert_eq!(
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text.parse::<ExtXIFrameStreamInf>().unwrap(),
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i_frame_stream_inf.clone()
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);
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assert_eq!(i_frame_stream_inf.uri(), "foo");
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assert_eq!(*i_frame_stream_inf.bandwidth(), 1000);
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// TODO: test all the optional fields
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}
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#[test]
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fn test_requires_version() {
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assert_eq!(
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ExtXIFrameStreamInf::new("foo", 1000).requires_version(),
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ProtocolVersion::V1
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);
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}
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}
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