mirror of
https://github.com/sile/hls_m3u8.git
synced 2024-06-06 23:49:21 +00:00
529 lines
17 KiB
Rust
529 lines
17 KiB
Rust
use std::fmt;
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use std::str::FromStr;
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use std::time::Duration;
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use trackable::error::ErrorKindExt;
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use {Error, ErrorKind, Result};
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use attribute::{AttributePairs, QuotedString};
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use string::M3u8String;
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use version::ProtocolVersion;
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macro_rules! may_invalid {
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($expr:expr) => {
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$expr.map_err(|e| track!(Error::from(ErrorKind::InvalidInput.cause(e))))
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}
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}
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#[derive(Debug, Clone, PartialEq, Eq)]
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pub enum Tag {
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ExtM3u(ExtM3u),
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ExtXVersion(ExtXVersion),
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ExtInf(ExtInf),
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ExtXByteRange(ExtXByteRange),
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ExtXDiscontinuity(ExtXDiscontinuity),
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ExtXKey(ExtXKey),
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ExtXTargetDuration(ExtXTargetDuration),
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ExtXMediaSequence(ExtXMediaSequence),
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ExtXDiscontinuitySequence(ExtXDiscontinuitySequence),
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ExtXEndList(ExtXEndList),
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ExtXPlaylistType(ExtXPlaylistType),
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ExtXIFramesOnly(ExtXIFramesOnly),
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ExtXIndependentSegments(ExtXIndependentSegments),
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}
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impl fmt::Display for Tag {
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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match *self {
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Tag::ExtM3u(ref t) => t.fmt(f),
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Tag::ExtXVersion(ref t) => t.fmt(f),
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Tag::ExtInf(ref t) => t.fmt(f),
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Tag::ExtXByteRange(ref t) => t.fmt(f),
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Tag::ExtXDiscontinuity(ref t) => t.fmt(f),
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Tag::ExtXKey(ref t) => t.fmt(f),
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Tag::ExtXTargetDuration(ref t) => t.fmt(f),
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Tag::ExtXMediaSequence(ref t) => t.fmt(f),
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Tag::ExtXDiscontinuitySequence(ref t) => t.fmt(f),
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Tag::ExtXEndList(ref t) => t.fmt(f),
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Tag::ExtXPlaylistType(ref t) => t.fmt(f),
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Tag::ExtXIFramesOnly(ref t) => t.fmt(f),
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Tag::ExtXIndependentSegments(ref t) => t.fmt(f),
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}
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}
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}
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impl FromStr for Tag {
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type Err = Error;
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fn from_str(s: &str) -> Result<Self> {
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if s.starts_with(ExtM3u::PREFIX) {
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track!(s.parse().map(Tag::ExtM3u))
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} else if s.starts_with(ExtXVersion::PREFIX) {
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track!(s.parse().map(Tag::ExtXVersion))
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} else if s.starts_with(ExtInf::PREFIX) {
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track!(s.parse().map(Tag::ExtInf))
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} else if s.starts_with(ExtXByteRange::PREFIX) {
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track!(s.parse().map(Tag::ExtXByteRange))
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} else if s.starts_with(ExtXDiscontinuity::PREFIX) {
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track!(s.parse().map(Tag::ExtXDiscontinuity))
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} else if s.starts_with(ExtXKey::PREFIX) {
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track!(s.parse().map(Tag::ExtXKey))
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} else if s.starts_with(ExtXTargetDuration::PREFIX) {
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track!(s.parse().map(Tag::ExtXTargetDuration))
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} else if s.starts_with(ExtXMediaSequence::PREFIX) {
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track!(s.parse().map(Tag::ExtXMediaSequence))
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} else if s.starts_with(ExtXDiscontinuitySequence::PREFIX) {
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track!(s.parse().map(Tag::ExtXDiscontinuitySequence))
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} else if s.starts_with(ExtXEndList::PREFIX) {
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track!(s.parse().map(Tag::ExtXEndList))
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} else if s.starts_with(ExtXPlaylistType::PREFIX) {
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track!(s.parse().map(Tag::ExtXPlaylistType))
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} else if s.starts_with(ExtXIFramesOnly::PREFIX) {
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track!(s.parse().map(Tag::ExtXIFramesOnly))
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} else if s.starts_with(ExtXIndependentSegments::PREFIX) {
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track!(s.parse().map(Tag::ExtXIndependentSegments))
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} else {
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// TODO: ignore any unrecognized tags. (section-6.3.1)
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track_panic!(ErrorKind::InvalidInput, "Unknown tag: {:?}", s)
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}
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}
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}
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// TODO: MediaSegmentTag
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#[derive(Debug, Clone, PartialEq, Eq)]
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pub struct ExtM3u;
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impl ExtM3u {
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const PREFIX: &'static str = "#EXTM3U";
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}
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impl fmt::Display for ExtM3u {
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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Self::PREFIX.fmt(f)
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}
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}
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impl FromStr for ExtM3u {
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type Err = Error;
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fn from_str(s: &str) -> Result<Self> {
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track_assert_eq!(s, Self::PREFIX, ErrorKind::InvalidInput);
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Ok(ExtM3u)
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}
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}
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// TODO: A Playlist file MUST NOT contain more than one EXT-X-VERSION tag
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#[derive(Debug, Clone, PartialEq, Eq)]
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pub struct ExtXVersion {
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pub version: ProtocolVersion,
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}
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impl ExtXVersion {
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const PREFIX: &'static str = "#EXT-X-VERSION:";
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}
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impl fmt::Display for ExtXVersion {
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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write!(f, "{}{}", Self::PREFIX, self.version)
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}
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}
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impl FromStr for ExtXVersion {
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type Err = Error;
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fn from_str(s: &str) -> Result<Self> {
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track_assert!(s.starts_with(Self::PREFIX), ErrorKind::InvalidInput);
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let suffix = s.split_at(Self::PREFIX.len()).1;
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let version = track!(suffix.parse())?;
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Ok(ExtXVersion { version })
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}
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}
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// TODO: This tag is REQUIRED for each Media Segment
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// TODO: if the compatibility version number is less than 3, durations MUST be integers.
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#[derive(Debug, Clone, PartialEq, Eq)]
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pub struct ExtInf {
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pub duration: Duration,
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pub title: Option<M3u8String>,
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}
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impl ExtInf {
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const PREFIX: &'static str = "#EXTINF:";
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// TODO: pub fn required_version(&self) -> ProtocolVersion;
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}
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impl fmt::Display for ExtInf {
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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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let duration = (self.duration.as_secs() as f64)
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+ (self.duration.subsec_nanos() as f64 / 1_000_000_000.0);
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write!(f, "{}", duration)?;
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if let Some(ref title) = self.title {
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write!(f, ",{}", title)?;
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}
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Ok(())
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}
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}
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impl FromStr for ExtInf {
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type Err = Error;
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fn from_str(s: &str) -> Result<Self> {
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track_assert!(s.starts_with(Self::PREFIX), ErrorKind::InvalidInput);
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let mut tokens = s.split_at(Self::PREFIX.len()).1.splitn(2, ',');
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let duration: f64 = may_invalid!(tokens.next().expect("Never fails").parse())?;
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let duration = Duration::new(duration as u64, (duration.fract() * 1_000_000_000.0) as u32);
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let title = if let Some(title) = tokens.next() {
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Some(track!(M3u8String::new(title))?)
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} else {
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None
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};
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Ok(ExtInf { duration, title })
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}
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}
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// TODO: If o is not present, a previous Media Segment MUST appear in the Playlist file
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// TDOO: Use of the EXT-X-BYTERANGE tag REQUIRES a compatibility version number of 4 or greater.
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#[derive(Debug, Clone, PartialEq, Eq)]
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pub struct ExtXByteRange {
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pub length: usize,
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pub offset: Option<usize>,
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}
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impl ExtXByteRange {
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const PREFIX: &'static str = "#EXT-X-BYTERANGE:";
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}
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impl fmt::Display for ExtXByteRange {
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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write!(f, "{}{}", Self::PREFIX, self.length)?;
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if let Some(offset) = self.offset {
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write!(f, "@{}", offset)?;
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}
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Ok(())
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}
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}
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impl FromStr for ExtXByteRange {
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type Err = Error;
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fn from_str(s: &str) -> Result<Self> {
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track_assert!(s.starts_with(Self::PREFIX), ErrorKind::InvalidInput);
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let mut tokens = s.split_at(Self::PREFIX.len()).1.splitn(2, '@');
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let length = may_invalid!(tokens.next().expect("Never fails").parse())?;
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let offset = if let Some(offset) = tokens.next() {
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Some(may_invalid!(offset.parse())?)
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} else {
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None
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};
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Ok(ExtXByteRange { length, offset })
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}
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}
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#[derive(Debug, Clone, PartialEq, Eq)]
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pub struct ExtXDiscontinuity;
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impl ExtXDiscontinuity {
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const PREFIX: &'static str = "#EXT-X-DISCONTINUITY";
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}
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impl fmt::Display for ExtXDiscontinuity {
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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Self::PREFIX.fmt(f)
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}
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}
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impl FromStr for ExtXDiscontinuity {
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type Err = Error;
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fn from_str(s: &str) -> Result<Self> {
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track_assert_eq!(s, Self::PREFIX, ErrorKind::InvalidInput);
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Ok(ExtXDiscontinuity)
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}
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}
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#[derive(Debug, Clone, PartialEq, Eq)]
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pub struct ExtXKey {
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pub method: EncryptionMethod,
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pub uri: Option<QuotedString>,
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}
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impl ExtXKey {
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const PREFIX: &'static str = "#EXT-X-KEY:";
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}
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impl fmt::Display for ExtXKey {
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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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unimplemented!()
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}
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}
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impl FromStr for ExtXKey {
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type Err = Error;
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fn from_str(s: &str) -> Result<Self> {
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track_assert!(s.starts_with(Self::PREFIX), ErrorKind::InvalidInput);
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let mut method = None;
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let mut uri = None;
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let attrs = AttributePairs::parse(s.split_at(Self::PREFIX.len()).1);
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for attr in attrs {
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let (key, value) = track!(attr)?;
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match key {
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"METHOD" => {
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method = Some(track!(value.parse())?);
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}
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"URI" => {
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uri = Some(track!(value.parse())?);
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}
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"IV" => unimplemented!(),
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"KEYFORMAT" => unimplemented!(),
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"KEYFORMATVERSIONS" => unimplemented!(),
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_ => {
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// [6.3.1] 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 method = track_assert_some!(method, ErrorKind::InvalidInput);
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if let EncryptionMethod::None = method {
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track_assert_eq!(uri, None, ErrorKind::InvalidInput);
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} else {
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track_assert!(uri.is_some(), ErrorKind::InvalidInput);
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};
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Ok(ExtXKey { method, uri })
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}
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}
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// TODO: move
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#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
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pub enum EncryptionMethod {
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None,
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Aes128,
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SampleAes,
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}
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impl fmt::Display for EncryptionMethod {
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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match *self {
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EncryptionMethod::None => "NONE".fmt(f),
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EncryptionMethod::Aes128 => "AES-128".fmt(f),
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EncryptionMethod::SampleAes => "SAMPLE-AES".fmt(f),
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}
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}
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}
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impl FromStr for EncryptionMethod {
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type Err = Error;
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fn from_str(s: &str) -> Result<Self> {
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match s {
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"NONE" => Ok(EncryptionMethod::None),
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"AES-128" => Ok(EncryptionMethod::Aes128),
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"SAMPLE-AES" => Ok(EncryptionMethod::SampleAes),
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_ => track_panic!(
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ErrorKind::InvalidInput,
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"Unknown encryption method: {:?}",
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s
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),
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}
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}
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}
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// TODO: https://tools.ietf.org/html/rfc8216#section-4.3.2.5
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// TODO:
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// #[derive(Debug, Clone, PartialEq, Eq)]
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// pub struct ExtXProgramDateTime { date_time }
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// impl ExtXProgramDateTime {
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// const PREFIX: &'static str = "#EXT-X-PROGRAM-DATE-TIME:";
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// }
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// impl fmt::Display for ExtXProgramDateTime {
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// fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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// write!(f, "{}{}", Self::PREFIX, self.length)?;
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// if let Some(offset) = self.offset {
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// write!(f, "@{}", offset)?;
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// }
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// Ok(())
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// }
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// }
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// impl FromStr for ExtXProgramDateTime {
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// type Err = Error;
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// fn from_str(s: &str) -> Result<Self> {
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// track_assert!(s.starts_with(Self::PREFIX), ErrorKind::InvalidInput);
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// let mut tokens = s.split_at(Self::PREFIX.len()).1.splitn(2, '@');
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// let length = may_invalid!(tokens.next().expect("Never fails").parse())?;
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// let offset = if let Some(offset) = tokens.next() {
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// Some(may_invalid!(offset.parse())?)
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// } else {
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// None
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// };
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// Ok(ExtXByteRange { length, offset })
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// }
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// }
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// TODO: https://tools.ietf.org/html/rfc8216#section-4.3.2.7
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// TODO: he EXT-X-TARGETDURATION tag is REQUIRED.
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#[derive(Debug, Clone, PartialEq, Eq)]
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pub struct ExtXTargetDuration {
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pub duration: Duration,
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}
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impl ExtXTargetDuration {
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const PREFIX: &'static str = "#EXT-X-TARGETDURATION:";
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}
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impl fmt::Display for ExtXTargetDuration {
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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write!(f, "{}{}", Self::PREFIX, self.duration.as_secs())
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}
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}
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impl FromStr for ExtXTargetDuration {
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type Err = Error;
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fn from_str(s: &str) -> Result<Self> {
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track_assert!(s.starts_with(Self::PREFIX), ErrorKind::InvalidInput);
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let duration = may_invalid!(s.split_at(Self::PREFIX.len()).1.parse())?;
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Ok(ExtXTargetDuration {
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duration: Duration::from_secs(duration),
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})
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}
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}
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// TODO: The EXT-X-MEDIA-SEQUENCE tag MUST appear before the first Media Segment in the Playlist.
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#[derive(Debug, Clone, PartialEq, Eq)]
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pub struct ExtXMediaSequence {
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pub seq_num: u64,
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}
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impl ExtXMediaSequence {
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const PREFIX: &'static str = "#EXT-X-MEDIA-SEQUENCE:";
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}
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impl fmt::Display for ExtXMediaSequence {
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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write!(f, "{}{}", Self::PREFIX, self.seq_num)
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}
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}
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impl FromStr for ExtXMediaSequence {
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type Err = Error;
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fn from_str(s: &str) -> Result<Self> {
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track_assert!(s.starts_with(Self::PREFIX), ErrorKind::InvalidInput);
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let seq_num = may_invalid!(s.split_at(Self::PREFIX.len()).1.parse())?;
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Ok(ExtXMediaSequence { seq_num })
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}
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}
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// TODO: The EXT-X-DISCONTINUITY-SEQUENCE tag MUST appear before the first Media Segment in the Playlist.
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// TODO: The EXT-X-DISCONTINUITY-SEQUENCE tag MUST appear before any EXT-X-DISCONTINUITY tag.
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#[derive(Debug, Clone, PartialEq, Eq)]
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pub struct ExtXDiscontinuitySequence {
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pub seq_num: u64,
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}
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impl ExtXDiscontinuitySequence {
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const PREFIX: &'static str = "#EXT-X-DISCONTINUITY-SEQUENCE:";
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}
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impl fmt::Display for ExtXDiscontinuitySequence {
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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write!(f, "{}{}", Self::PREFIX, self.seq_num)
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}
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}
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impl FromStr for ExtXDiscontinuitySequence {
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type Err = Error;
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fn from_str(s: &str) -> Result<Self> {
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track_assert!(s.starts_with(Self::PREFIX), ErrorKind::InvalidInput);
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let seq_num = may_invalid!(s.split_at(Self::PREFIX.len()).1.parse())?;
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Ok(ExtXDiscontinuitySequence { seq_num })
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}
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}
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#[derive(Debug, Clone, PartialEq, Eq)]
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pub struct ExtXEndList;
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impl ExtXEndList {
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const PREFIX: &'static str = "#EXT-X-ENDLIST";
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}
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impl fmt::Display for ExtXEndList {
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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Self::PREFIX.fmt(f)
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}
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}
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impl FromStr for ExtXEndList {
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type Err = Error;
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fn from_str(s: &str) -> Result<Self> {
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track_assert_eq!(s, Self::PREFIX, ErrorKind::InvalidInput);
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Ok(ExtXEndList)
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}
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}
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#[derive(Debug, Clone, PartialEq, Eq)]
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pub struct ExtXPlaylistType {
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pub playlist_type: PlaylistType,
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}
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impl ExtXPlaylistType {
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const PREFIX: &'static str = "#EXT-X-PLAYLIST-TYPE:";
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}
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impl fmt::Display for ExtXPlaylistType {
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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write!(f, "{}{}", Self::PREFIX, self.playlist_type)
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}
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}
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impl FromStr for ExtXPlaylistType {
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type Err = Error;
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fn from_str(s: &str) -> Result<Self> {
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track_assert!(s.starts_with(Self::PREFIX), ErrorKind::InvalidInput);
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let playlist_type = may_invalid!(s.split_at(Self::PREFIX.len()).1.parse())?;
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Ok(ExtXPlaylistType { playlist_type })
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}
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}
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#[derive(Debug, Clone, Copy, PartialEq, Eq)]
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pub enum PlaylistType {
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Event,
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Vod,
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}
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impl fmt::Display for PlaylistType {
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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match *self {
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PlaylistType::Event => write!(f, "EVENT"),
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PlaylistType::Vod => write!(f, "VOD"),
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}
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}
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}
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impl FromStr for PlaylistType {
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type Err = Error;
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fn from_str(s: &str) -> Result<Self> {
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match s {
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"EVENT" => Ok(PlaylistType::Event),
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"VOD" => Ok(PlaylistType::Vod),
|
|
_ => track_panic!(ErrorKind::InvalidInput, "Unknown playlist type: {:?}", s),
|
|
}
|
|
}
|
|
}
|
|
|
|
// TODO: Media resources containing I-frame segments MUST begin with ...
|
|
// TODO: Use of the EXT-X-I-FRAMES-ONLY REQUIRES a compatibility version number of 4 or greater.
|
|
#[derive(Debug, Clone, PartialEq, Eq)]
|
|
pub struct ExtXIFramesOnly;
|
|
impl ExtXIFramesOnly {
|
|
const PREFIX: &'static str = "#EXT-X-I-FRAMES-ONLY";
|
|
}
|
|
impl fmt::Display for ExtXIFramesOnly {
|
|
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
|
|
Self::PREFIX.fmt(f)
|
|
}
|
|
}
|
|
impl FromStr for ExtXIFramesOnly {
|
|
type Err = Error;
|
|
fn from_str(s: &str) -> Result<Self> {
|
|
track_assert_eq!(s, Self::PREFIX, ErrorKind::InvalidInput);
|
|
Ok(ExtXIFramesOnly)
|
|
}
|
|
}
|
|
|
|
// TODO: https://tools.ietf.org/html/rfc8216#section-4.3.4.1
|
|
|
|
// TODO: https://tools.ietf.org/html/rfc8216#section-4.3.4.2
|
|
|
|
// TODO: https://tools.ietf.org/html/rfc8216#section-4.3.4.3
|
|
|
|
// TODO: https://tools.ietf.org/html/rfc8216#section-4.3.4.4
|
|
|
|
// TODO: https://tools.ietf.org/html/rfc8216#section-4.3.4.5
|
|
|
|
// 4.3.5. Media or Master Playlist Tags
|
|
// TODO: A tag that appears in both MUST have the same value; otherwise, clients SHOULD ignore the value in the Media Playlist(s).
|
|
// TODO: These tags MUST NOT appear more than once in a Playlist.
|
|
|
|
#[derive(Debug, Clone, PartialEq, Eq)]
|
|
pub struct ExtXIndependentSegments;
|
|
impl ExtXIndependentSegments {
|
|
const PREFIX: &'static str = "#EXT-X-INDEPENDENT-SEGMENTS";
|
|
}
|
|
impl fmt::Display for ExtXIndependentSegments {
|
|
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
|
|
Self::PREFIX.fmt(f)
|
|
}
|
|
}
|
|
impl FromStr for ExtXIndependentSegments {
|
|
type Err = Error;
|
|
fn from_str(s: &str) -> Result<Self> {
|
|
track_assert_eq!(s, Self::PREFIX, ErrorKind::InvalidInput);
|
|
Ok(ExtXIndependentSegments)
|
|
}
|
|
}
|
|
|
|
// TODO: https://tools.ietf.org/html/rfc8216#section-4.3.5.2
|