mirror of
https://github.com/rutgersc/m3u8-rs.git
synced 2024-05-18 16:28:18 +00:00
Add parser as default feature
This commit is contained in:
Rutger Schoorstra
parent
c3ef5bc16e
commit
dc576c8e3c
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@ -9,4 +9,9 @@ documentation = "https://rutgersc.github.io/doc/m3u8_rs/index.html"
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license = "MIT"
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[dependencies]
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nom = "5.1.0"
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nom = { version = "5.1.0", optional = true }
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[features]
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default = ["parser"]
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parser = ["nom"]
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694
src/lib.rs
694
src/lib.rs
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@ -1,691 +1,9 @@
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//! A library to parse m3u8 playlists (HTTP Live Streaming) [link]
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//! (https://tools.ietf.org/html/draft-pantos-http-live-streaming-19).
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//!
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//! # Examples
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//!
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//! Parsing a playlist and let the parser figure out if it's a media or master playlist.
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//!
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//! ```
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//! extern crate nom;
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//! extern crate m3u8_rs;
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//! use m3u8_rs::playlist::Playlist;
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//! use nom::IResult;
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//! use std::io::Read;
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//!
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//! fn main() {
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//! let mut file = std::fs::File::open("playlist.m3u8").unwrap();
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//! let mut bytes: Vec<u8> = Vec::new();
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//! file.read_to_end(&mut bytes).unwrap();
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//!
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//! match m3u8_rs::parse_playlist(&bytes) {
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//! Result::Ok((i, Playlist::MasterPlaylist(pl))) => println!("Master playlist:\n{:?}", pl),
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//! Result::Ok((i, Playlist::MediaPlaylist(pl))) => println!("Media playlist:\n{:?}", pl),
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//! Result::Err(e) => panic!("Parsing error: \n{}", e),
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//! }
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//! }
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//! ```
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//!
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//! Parsing a master playlist directly
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//!
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//! ```
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//! extern crate nom;
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//! extern crate m3u8_rs;
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//! use std::io::Read;
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//! use nom::IResult;
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//!
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//! fn main() {
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//! let mut file = std::fs::File::open("masterplaylist.m3u8").unwrap();
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//! let mut bytes: Vec<u8> = Vec::new();
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//! file.read_to_end(&mut bytes).unwrap();
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//!
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//! if let Result::Ok((_, pl)) = m3u8_rs::parse_master_playlist(&bytes) {
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//! println!("{:?}", pl);
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//! }
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//! }
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//!
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//! ```
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//!
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//! Creating a playlist and writing it back to a vec/file
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//!
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//! ```
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//! extern crate m3u8_rs;
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//! use m3u8_rs::playlist::{MediaPlaylist, MediaPlaylistType, MediaSegment};
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//!
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//! fn main() {
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//! let playlist = MediaPlaylist {
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//! version: 6,
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//! target_duration: 3.0,
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//! media_sequence: 338559,
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//! discontinuity_sequence: 1234,
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//! end_list: true,
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//! playlist_type: Some(MediaPlaylistType::Vod),
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//! segments: vec![
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//! MediaSegment {
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//! uri: "20140311T113819-01-338559live.ts".into(),
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//! duration: 2.002,
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//! title: Some("title".into()),
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//! ..Default::default()
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//! },
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//! ],
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//! ..Default::default()
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//! };
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//!
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//! //let mut v: Vec<u8> = Vec::new();
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//! //playlist.write_to(&mut v).unwrap();
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//!
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//! //let mut file = std::fs::File::open("playlist.m3u8").unwrap();
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//! //playlist.write_to(&mut file).unwrap();
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//! }
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//!
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//! ```
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extern crate nom;
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#[path = "playlist.rs"]
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pub mod playlist;
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use self::nom::character::complete::{digit1, multispace0, space0 };
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use self::nom::{IResult};
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use self::nom::{ delimited,none_of,peek,is_a,is_not,complete,terminated,tag,
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alt,do_parse,opt,named,map,map_res,eof,many0,take,take_until,char};
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use self::nom::combinator::map;
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use self::nom::character::complete::{line_ending, not_line_ending};
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use std::str;
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use std::f32;
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use std::string;
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use std::str::FromStr;
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use std::result::Result;
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use std::collections::HashMap;
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use playlist::*;
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#[path = "parser.rs"]
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#[cfg(feature = "parser")]
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mod parser;
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// -----------------------------------------------------------------------------------------------
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// Playlist parser
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// -----------------------------------------------------------------------------------------------
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/// Parse an m3u8 playlist.
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///
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/// # Examples
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///
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/// ```
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/// use std::io::Read;
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/// use m3u8_rs::playlist::{Playlist};
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///
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/// let mut file = std::fs::File::open("playlist.m3u8").unwrap();
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/// let mut bytes: Vec<u8> = Vec::new();
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/// file.read_to_end(&mut bytes).unwrap();
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///
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/// let parsed = m3u8_rs::parse_playlist(&bytes);
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///
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/// let playlist = match parsed {
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/// Result::Ok((i, playlist)) => playlist,
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/// Result::Err(e) => panic!("Parsing error: \n{}", e),
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/// };
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///
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/// match playlist {
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/// Playlist::MasterPlaylist(pl) => println!("Master playlist:\n{:?}", pl),
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/// Playlist::MediaPlaylist(pl) => println!("Media playlist:\n{:?}", pl),
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/// }
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/// ```
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pub fn parse_playlist(input: &[u8]) -> IResult<&[u8], Playlist> {
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match is_master_playlist(input) {
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true => map(parse_master_playlist, Playlist::MasterPlaylist)(input),
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false =>map(parse_media_playlist, Playlist::MediaPlaylist)(input),
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}
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}
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/// Parses an m3u8 playlist just like `parse_playlist`, except that this returns an [std::result::Result](std::result::Result) instead of a [nom::IResult](https://docs.rs/nom/1.2.3/nom/enum.IResult.html).
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/// However, since [nom::IResult](nom::IResult) is now an [alias to Result](https://github.com/Geal/nom/blob/master/doc/upgrading_to_nom_5.md), this is no longer needed.
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///
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/// # Examples
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///
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/// ```
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/// use m3u8_rs::playlist::{Playlist};
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/// use std::io::Read;
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///
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/// let mut file = std::fs::File::open("playlist.m3u8").unwrap();
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/// let mut bytes: Vec<u8> = Vec::new();
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/// file.read_to_end(&mut bytes).unwrap();
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///
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/// let parsed = m3u8_rs::parse_playlist_res(&bytes);
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///
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/// match parsed {
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/// Ok(Playlist::MasterPlaylist(pl)) => println!("Master playlist:\n{:?}", pl),
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/// Ok(Playlist::MediaPlaylist(pl)) => println!("Media playlist:\n{:?}", pl),
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/// Err(e) => println!("Error: {:?}", e)
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/// }
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/// ```
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pub fn parse_playlist_res(input: &[u8]) -> Result<Playlist, IResult<&[u8], Playlist>> {
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let parse_result = parse_playlist(input);
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match parse_result {
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IResult::Ok((_, playlist)) => Ok(playlist),
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_ => Err(parse_result),
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}
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}
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/// Parse input as a master playlist
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pub fn parse_master_playlist(input: &[u8]) -> IResult<&[u8], MasterPlaylist> {
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map(parse_master_playlist_tags, master_playlist_from_tags)(input)
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}
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/// Parse input as a master playlist
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pub fn parse_master_playlist_res(input: &[u8]) -> Result<MasterPlaylist, IResult<&[u8], MasterPlaylist>> {
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let parse_result = parse_master_playlist(input);
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match parse_result {
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IResult::Ok((_, playlist)) => Ok(playlist),
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_ => Err(parse_result),
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}
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}
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/// Parse input as a media playlist
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pub fn parse_media_playlist(input: &[u8]) -> IResult<&[u8], MediaPlaylist> {
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map(parse_media_playlist_tags, media_playlist_from_tags)(input)
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}
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/// Parse input as a media playlist
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pub fn parse_media_playlist_res(input: &[u8]) -> Result<MediaPlaylist, IResult<&[u8], MediaPlaylist>> {
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let parse_result = parse_media_playlist(input);
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match parse_result {
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IResult::Ok((_, playlist)) => Ok(playlist),
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_ => Err(parse_result),
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}
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}
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/// When a media tag or no master tag is found, this returns false.
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pub fn is_master_playlist(input: &[u8]) -> bool {
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// Assume it's not a master playlist
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contains_master_tag(input).map(|t| t.0).unwrap_or(false)
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}
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/// Scans input looking for either a master or media `#EXT` tag.
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///
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/// Returns `Some(true/false)` when a master/media tag is found. Otherwise returns `None`.
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///
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/// - None: Unkown tag or empty line
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/// - Some(true, tagstring): Line contains a master playlist tag
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/// - Some(false, tagstring): Line contains a media playlist tag
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pub fn contains_master_tag(input: &[u8]) -> Option<(bool, String)> {
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let mut is_master_opt = None;
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let mut current_input: &[u8] = input;
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while is_master_opt == None {
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match is_master_playlist_tag_line(current_input) {
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IResult::Ok((rest, result)) => {
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current_input = rest;
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is_master_opt = result; // result can be None (no media or master tag found)
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}
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_ => break, // Parser error encountered, can't read any more lines.
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}
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}
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is_master_opt
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}
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named!(pub is_master_playlist_tag_line(&[u8]) -> Option<(bool, String)>,
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do_parse!(
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opt!(is_a!("\r\n"))
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>> tag: opt!(alt!(
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map!(tag!("#EXT-X-STREAM-INF"), |t| (true, t))
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| map!(tag!("#EXT-X-I-FRAME-STREAM-INF"), |t| (true, t))
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| map!(terminated!(tag!("#EXT-X-MEDIA"), is_not!("-")), |t| (true, t)) // terminated!() to prevent matching with #EXT-X-MEDIA-SEQUENCE for which we have a separate pattern below
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| map!(tag!("#EXT-X-SESSION-KEY"), |t| (true, t))
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| map!(tag!("#EXT-X-SESSION-DATA"), |t| (true, t))
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| map!(tag!("#EXT-X-TARGETDURATION"), |t| (false, t))
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| map!(tag!("#EXT-X-MEDIA-SEQUENCE"), |t| (false, t))
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| map!(tag!("#EXT-X-DISCONTINUITY-SEQUENCE"), |t| (false, t))
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| map!(tag!("#EXT-X-ENDLIST"), |t| (false, t))
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| map!(tag!("#EXT-X-PLAYLIST-TYPE"), |t| (false, t))
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| map!(tag!("#EXT-X-I-FRAMES-ONLY"), |t| (false, t))
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| map!(tag!("#EXTINF"), |t| (false, t))
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| map!(tag!("#EXT-X-BYTERANGE"), |t| (false, t))
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| map!(tag!("#EXT-X-DISCONTINUITY"), |t| (false, t))
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| map!(tag!("#EXT-X-KEY"), |t| (false, t))
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| map!(tag!("#EXT-X-MAP"), |t| (false, t))
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| map!(tag!("#EXT-X-PROGRAM-DATE-TIME"), |t| (false, t))
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| map!(tag!("#EXT-X-DATERANGE"), |t| (false, t))
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))
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>> consume_line
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>>
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( {
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tag.map(|(a,b)| (a, from_utf8_slice(b).unwrap()))
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} )
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)
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);
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// -----------------------------------------------------------------------------------------------
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// Master Playlist Tags
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// -----------------------------------------------------------------------------------------------
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pub fn parse_master_playlist_tags(input: &[u8]) -> IResult<&[u8], Vec<MasterPlaylistTag>> {
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do_parse!(input,
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tags: many0!(complete!(do_parse!( m : master_playlist_tag >> multispace0 >> (m) )))
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>> opt!(eof!())
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>>
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( {let mut tags_rev: Vec<MasterPlaylistTag> = tags; tags_rev.reverse(); tags_rev } )
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)
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}
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/// Contains all the tags required to parse a master playlist.
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#[derive(Debug)]
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pub enum MasterPlaylistTag {
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M3U(String),
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Version(usize),
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VariantStream(VariantStream),
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AlternativeMedia(AlternativeMedia),
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SessionData(SessionData),
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SessionKey(SessionKey),
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Start(Start),
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IndependentSegments,
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Unknown(ExtTag),
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Comment(String),
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Uri(String),
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}
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pub fn master_playlist_tag(input: &[u8]) -> IResult<&[u8], MasterPlaylistTag> {
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alt!(input,
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map!(m3u_tag, MasterPlaylistTag::M3U)
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| map!(version_tag, MasterPlaylistTag::Version)
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| map!(variant_stream_tag, MasterPlaylistTag::VariantStream)
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| map!(variant_i_frame_stream_tag, MasterPlaylistTag::VariantStream)
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| map!(alternative_media_tag, MasterPlaylistTag::AlternativeMedia)
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| map!(session_data_tag, MasterPlaylistTag::SessionData)
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| map!(session_key_tag, MasterPlaylistTag::SessionKey)
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| map!(start_tag, MasterPlaylistTag::Start)
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| map!(tag!("#EXT-X-INDEPENDENT-SEGMENTS"), |_| MasterPlaylistTag::IndependentSegments)
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| map!(ext_tag, MasterPlaylistTag::Unknown)
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| map!(comment_tag, MasterPlaylistTag::Comment)
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| map!(consume_line, MasterPlaylistTag::Uri)
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)
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}
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pub fn master_playlist_from_tags(mut tags: Vec<MasterPlaylistTag>) -> MasterPlaylist {
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let mut master_playlist = MasterPlaylist::default();
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while let Some(tag) = tags.pop() {
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match tag {
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MasterPlaylistTag::Version(v) => {
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master_playlist.version = v;
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}
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MasterPlaylistTag::AlternativeMedia(v) => {
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master_playlist.alternatives.push(v);
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}
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MasterPlaylistTag::VariantStream(stream) => {
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master_playlist.variants.push(stream);
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}
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MasterPlaylistTag::Uri(uri) => {
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if let Some(stream) = master_playlist.get_newest_variant() {
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stream.uri = uri;
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}
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}
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MasterPlaylistTag::SessionData(data) => {
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master_playlist.session_data.push(data);
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}
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MasterPlaylistTag::SessionKey(key) => {
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master_playlist.session_key.push(key);
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}
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MasterPlaylistTag::Start(s) => {
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master_playlist.start = Some(s);
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}
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MasterPlaylistTag::IndependentSegments => {
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master_playlist.independent_segments = true;
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}
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MasterPlaylistTag::Unknown(unknown) => {
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master_playlist.unknown_tags.push(unknown);
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}
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_ => (),
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}
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}
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master_playlist
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}
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named!(pub variant_stream_tag<VariantStream>,
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do_parse!(tag!("#EXT-X-STREAM-INF:") >> attributes: key_value_pairs >>
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( VariantStream::from_hashmap(attributes, false)))
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);
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named!(pub variant_i_frame_stream_tag<VariantStream>,
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do_parse!( tag!("#EXT-X-I-FRAME-STREAM-INF:") >> attributes: key_value_pairs >>
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( VariantStream::from_hashmap(attributes, true)))
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);
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named!(pub alternative_media_tag<AlternativeMedia>,
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do_parse!( tag!("#EXT-X-MEDIA:") >> attributes: key_value_pairs >>
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( AlternativeMedia::from_hashmap(attributes)))
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);
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named!(pub session_data_tag<SessionData>,
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do_parse!( tag!("#EXT-X-SESSION-DATA:") >>
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session_data: map_res!(key_value_pairs, |attrs| SessionData::from_hashmap(attrs)) >>
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( session_data))
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);
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named!(pub session_key_tag<SessionKey>,
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do_parse!( tag!("#EXT-X-SESSION-KEY:") >> session_key: map!(key, SessionKey) >>
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( session_key))
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);
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// -----------------------------------------------------------------------------------------------
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// Media Playlist
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// -----------------------------------------------------------------------------------------------
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pub fn parse_media_playlist_tags(input: &[u8]) -> IResult<&[u8], Vec<MediaPlaylistTag>> {
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do_parse!(input,
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tags: many0!(complete!(do_parse!(m:media_playlist_tag >> multispace0 >> (m) ))) >> opt!(eof!())
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>>
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( {let mut tags_rev: Vec<MediaPlaylistTag> = tags; tags_rev.reverse(); tags_rev } )
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)
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}
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/// Contains all the tags required to parse a media playlist.
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#[derive(Debug)]
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pub enum MediaPlaylistTag {
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M3U(String),
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Version(usize),
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Segment(SegmentTag),
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TargetDuration(f32),
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MediaSequence(i32),
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DiscontinuitySequence(i32),
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EndList,
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PlaylistType(MediaPlaylistType),
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IFramesOnly,
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Start(Start),
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IndependentSegments,
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}
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pub fn media_playlist_tag(input: &[u8]) -> IResult<&[u8], MediaPlaylistTag> {
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alt!(input,
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map!(m3u_tag, MediaPlaylistTag::M3U)
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| map!(version_tag, MediaPlaylistTag::Version)
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| map!(do_parse!(tag!("#EXT-X-TARGETDURATION:") >> n:float >> (n)), MediaPlaylistTag::TargetDuration)
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| map!(do_parse!(tag!("#EXT-X-MEDIA-SEQUENCE:") >> n:number >> (n)), MediaPlaylistTag::MediaSequence)
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| map!(do_parse!(tag!("#EXT-X-DISCONTINUITY-SEQUENCE:") >> n:number >> (n)), MediaPlaylistTag::DiscontinuitySequence)
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| map!(do_parse!(tag!("#EXT-X-PLAYLIST-TYPE:") >> t:playlist_type >> (t)), MediaPlaylistTag::PlaylistType)
|
||||
| map!(tag!("#EXT-X-I-FRAMES-ONLY"), |_| MediaPlaylistTag::IFramesOnly)
|
||||
| map!(start_tag, MediaPlaylistTag::Start)
|
||||
| map!(tag!("#EXT-X-INDEPENDENT-SEGMENTS"), |_| MediaPlaylistTag::IndependentSegments)
|
||||
| map!(tag!("#EXT-X-ENDLIST"), |_| MediaPlaylistTag::EndList)
|
||||
|
||||
| map!(media_segment_tag, MediaPlaylistTag::Segment)
|
||||
)
|
||||
}
|
||||
|
||||
pub fn media_playlist_from_tags(mut tags: Vec<MediaPlaylistTag>) -> MediaPlaylist {
|
||||
let mut media_playlist = MediaPlaylist::default();
|
||||
let mut next_segment = MediaSegment::empty();
|
||||
let mut encryption_key = None;
|
||||
let mut map = None;
|
||||
|
||||
while let Some(tag) = tags.pop() {
|
||||
|
||||
match tag {
|
||||
MediaPlaylistTag::Version(v) => {
|
||||
media_playlist.version = v;
|
||||
}
|
||||
MediaPlaylistTag::TargetDuration(d) => {
|
||||
media_playlist.target_duration = d;
|
||||
}
|
||||
MediaPlaylistTag::MediaSequence(n) => {
|
||||
media_playlist.media_sequence = n;
|
||||
}
|
||||
MediaPlaylistTag::DiscontinuitySequence(n) => {
|
||||
media_playlist.discontinuity_sequence = n;
|
||||
}
|
||||
MediaPlaylistTag::EndList => {
|
||||
media_playlist.end_list = true;
|
||||
}
|
||||
MediaPlaylistTag::PlaylistType(t) => {
|
||||
media_playlist.playlist_type = Some(t);
|
||||
}
|
||||
MediaPlaylistTag::IFramesOnly => {
|
||||
media_playlist.i_frames_only = true;
|
||||
}
|
||||
MediaPlaylistTag::Start(s) => {
|
||||
media_playlist.start = Some(s);
|
||||
}
|
||||
MediaPlaylistTag::IndependentSegments => {
|
||||
media_playlist.independent_segments = true;
|
||||
}
|
||||
MediaPlaylistTag::Segment(segment_tag) => {
|
||||
match segment_tag {
|
||||
SegmentTag::Extinf(d, t) => {
|
||||
next_segment.duration = d;
|
||||
next_segment.title = t;
|
||||
}
|
||||
SegmentTag::ByteRange(b) => {
|
||||
next_segment.byte_range = Some(b);
|
||||
}
|
||||
SegmentTag::Discontinuity => {
|
||||
next_segment.discontinuity = true;
|
||||
}
|
||||
SegmentTag::Key(k) => {
|
||||
encryption_key = Some(k);
|
||||
}
|
||||
SegmentTag::Map(m) => {
|
||||
map = Some(m);
|
||||
}
|
||||
SegmentTag::ProgramDateTime(d) => {
|
||||
next_segment.program_date_time = Some(d);
|
||||
}
|
||||
SegmentTag::DateRange(d) => {
|
||||
next_segment.daterange = Some(d);
|
||||
}
|
||||
SegmentTag::Unknown(t) => {
|
||||
media_playlist.unknown_tags.push(t);
|
||||
}
|
||||
SegmentTag::Uri(u) => {
|
||||
next_segment.key = encryption_key.clone();
|
||||
next_segment.map = map.clone();
|
||||
next_segment.uri = u;
|
||||
media_playlist.segments.push(next_segment);
|
||||
next_segment = MediaSegment::empty();
|
||||
encryption_key = None;
|
||||
map = None;
|
||||
}
|
||||
_ => (),
|
||||
}
|
||||
}
|
||||
_ => (),
|
||||
}
|
||||
}
|
||||
media_playlist
|
||||
}
|
||||
|
||||
named!(pub playlist_type<MediaPlaylistType>,
|
||||
map_res!(
|
||||
do_parse!(
|
||||
p: map_res!(is_not!("\r\n"), str::from_utf8)
|
||||
>> take!(1)
|
||||
>> (p)
|
||||
),
|
||||
MediaPlaylistType::from_str
|
||||
)
|
||||
);
|
||||
|
||||
// -----------------------------------------------------------------------------------------------
|
||||
// Media Segment
|
||||
// -----------------------------------------------------------------------------------------------
|
||||
|
||||
/// All possible media segment tags.
|
||||
#[derive(Debug)]
|
||||
pub enum SegmentTag {
|
||||
Extinf(f32, Option<String>),
|
||||
ByteRange(ByteRange),
|
||||
Discontinuity,
|
||||
Key(Key),
|
||||
Map(Map),
|
||||
ProgramDateTime(String),
|
||||
DateRange(String),
|
||||
Unknown(ExtTag),
|
||||
Comment(String),
|
||||
Uri(String),
|
||||
}
|
||||
|
||||
pub fn media_segment_tag(input: &[u8]) -> IResult<&[u8], SegmentTag> {
|
||||
alt!(input,
|
||||
map!(do_parse!(tag!("#EXTINF:") >> e:duration_title_tag >> (e)), |(a,b)| SegmentTag::Extinf(a,b))
|
||||
| map!(do_parse!(tag!("#EXT-X-BYTERANGE:") >> r:byte_range_val >> (r)), SegmentTag::ByteRange)
|
||||
| map!(tag!("#EXT-X-DISCONTINUITY"), |_| SegmentTag::Discontinuity)
|
||||
| map!(do_parse!(tag!("#EXT-X-KEY:") >> k: key >> (k)), SegmentTag::Key)
|
||||
| map!(do_parse!(tag!("#EXT-X-MAP:") >> m: extmap >> (m)), SegmentTag::Map)
|
||||
| map!(do_parse!(tag!("#EXT-X-PROGRAM-DATE-TIME:") >> t:consume_line >> (t)), SegmentTag::ProgramDateTime)
|
||||
| map!(do_parse!(tag!("#EXT-X-DATE-RANGE:") >> t:consume_line >> (t)), SegmentTag::DateRange)
|
||||
|
||||
| map!(ext_tag, SegmentTag::Unknown)
|
||||
| map!(comment_tag, SegmentTag::Comment)
|
||||
|
||||
| map!(consume_line, SegmentTag::Uri)
|
||||
)
|
||||
}
|
||||
|
||||
named!(pub duration_title_tag<(f32, Option<String>)>,
|
||||
do_parse!(
|
||||
duration: float
|
||||
>> opt!(tag!(","))
|
||||
>> title: opt!(map_res!(is_not!("\r\n,"), from_utf8_slice))
|
||||
>> take!(1)
|
||||
>> opt!(tag!(","))
|
||||
>>
|
||||
(duration, title)
|
||||
)
|
||||
);
|
||||
|
||||
named!(pub key<Key>, map!(key_value_pairs, Key::from_hashmap));
|
||||
|
||||
named!(pub extmap<Map>, map!(key_value_pairs, |attrs| Map {
|
||||
uri: attrs.get("URI").map(|u| u.clone()).unwrap_or_default(),
|
||||
byte_range: attrs.get("BYTERANGE").map(|range| {
|
||||
match byte_range_val(range.as_bytes()) {
|
||||
IResult::Ok((_, br)) => br,
|
||||
_ => panic!("Should not happen"),
|
||||
}
|
||||
}),
|
||||
}));
|
||||
|
||||
// -----------------------------------------------------------------------------------------------
|
||||
// Basic tags
|
||||
// -----------------------------------------------------------------------------------------------
|
||||
|
||||
named!(pub m3u_tag<String>,
|
||||
map_res!(tag!("#EXTM3U"), from_utf8_slice)
|
||||
);
|
||||
|
||||
named!(pub version_tag<usize>,
|
||||
do_parse!(
|
||||
tag!("#EXT-X-VERSION:") >> version: map_res!(digit1, str::from_utf8) >>
|
||||
(version.parse().unwrap_or_default())
|
||||
)
|
||||
);
|
||||
|
||||
named!(pub start_tag<Start>,
|
||||
do_parse!(tag!("#EXT-X-START:") >> attributes:key_value_pairs >>
|
||||
(Start::from_hashmap(attributes))
|
||||
)
|
||||
);
|
||||
|
||||
named!(pub ext_tag<ExtTag>,
|
||||
do_parse!(
|
||||
tag!("#EXT-")
|
||||
>> tag: map_res!(take_until!(":"), from_utf8_slice)
|
||||
>> take!(1)
|
||||
>> rest: map_res!(is_not!("\r\n"), from_utf8_slice)
|
||||
>> take!(1)
|
||||
>>
|
||||
(ExtTag { tag: tag, rest: rest })
|
||||
)
|
||||
);
|
||||
|
||||
named!(pub comment_tag<String>,
|
||||
do_parse!(
|
||||
tag!("#") >> text: map_res!(is_not!("\r\n"), from_utf8_slice)
|
||||
>> take!(1)
|
||||
>> (text)
|
||||
)
|
||||
);
|
||||
|
||||
// -----------------------------------------------------------------------------------------------
|
||||
// Util
|
||||
// -----------------------------------------------------------------------------------------------
|
||||
|
||||
named!(pub key_value_pairs(&[u8]) -> HashMap<String, String>,
|
||||
map!(
|
||||
many0!(do_parse!(space0 >> k:key_value_pair >> (k) ))
|
||||
,
|
||||
|pairs: Vec<(String, String)>| {
|
||||
pairs.into_iter().collect()
|
||||
}
|
||||
)
|
||||
);
|
||||
|
||||
named!(pub key_value_pair(&[u8]) -> (String, String),
|
||||
do_parse!(
|
||||
peek!(none_of!("\r\n"))
|
||||
>> left: map_res!(take_until!("="), from_utf8_slice)
|
||||
>> take!(1)
|
||||
>> right: alt!(quoted | unquoted)
|
||||
>> opt!(char!(','))
|
||||
>>
|
||||
(left, right)
|
||||
)
|
||||
);
|
||||
|
||||
named!(pub quoted<String>,
|
||||
delimited!(char!('\"'), map_res!(is_not!("\""), from_utf8_slice), char!('\"'))
|
||||
);
|
||||
|
||||
named!(pub unquoted<String>,
|
||||
map_res!(is_not!(",\r\n"), from_utf8_slice)
|
||||
);
|
||||
|
||||
named!(pub consume_line<String>,
|
||||
do_parse!(
|
||||
line: map_res!(not_line_ending, from_utf8_slice)
|
||||
>> opt!(line_ending)
|
||||
>> (line)
|
||||
)
|
||||
);
|
||||
|
||||
named!(pub number<i32>,
|
||||
map_res!(map_res!(digit1, str::from_utf8), str::FromStr::from_str)
|
||||
);
|
||||
|
||||
named!(pub byte_range_val<ByteRange>,
|
||||
do_parse!(
|
||||
n: number
|
||||
>> o: opt!(do_parse!(char!('@') >> n:number >> (n) )) >>
|
||||
(ByteRange { length: n, offset: o })
|
||||
)
|
||||
);
|
||||
|
||||
named!(pub float<f32>,
|
||||
do_parse!(
|
||||
left: map_res!(digit1, str::from_utf8)
|
||||
>> right_opt: opt!(do_parse!(char!('.') >> d:map_res!(digit1, str::from_utf8) >> (d) ))
|
||||
>>
|
||||
(
|
||||
match right_opt {
|
||||
Some(right) => {
|
||||
let mut num = String::from(left);
|
||||
num.push('.');
|
||||
num.push_str(right);
|
||||
num.parse().unwrap()
|
||||
},
|
||||
None => left.parse().unwrap(),
|
||||
})
|
||||
)
|
||||
);
|
||||
|
||||
pub fn from_utf8_slice(s: &[u8]) -> Result<String, string::FromUtf8Error> {
|
||||
String::from_utf8(s.to_vec())
|
||||
}
|
||||
|
||||
pub fn from_utf8_slice2(s: &[u8]) -> Result<String, str::Utf8Error> {
|
||||
str::from_utf8(s).map(String::from)
|
||||
}
|
||||
#[cfg(feature = "parser")]
|
||||
pub use self::parser::*;
|
||||
683
src/parser.rs
Normal file
683
src/parser.rs
Normal file
|
|
@ -0,0 +1,683 @@
|
|||
//! A library to parse m3u8 playlists (HTTP Live Streaming) [link]
|
||||
//! (https://tools.ietf.org/html/draft-pantos-http-live-streaming-19).
|
||||
//!
|
||||
//! # Examples
|
||||
//!
|
||||
//! Parsing a playlist and let the parser figure out if it's a media or master playlist.
|
||||
//!
|
||||
//! ```
|
||||
//! extern crate nom;
|
||||
//! extern crate m3u8_rs;
|
||||
//! use m3u8_rs::playlist::Playlist;
|
||||
//! use nom::IResult;
|
||||
//! use std::io::Read;
|
||||
//!
|
||||
//! fn main() {
|
||||
//! let mut file = std::fs::File::open("playlist.m3u8").unwrap();
|
||||
//! let mut bytes: Vec<u8> = Vec::new();
|
||||
//! file.read_to_end(&mut bytes).unwrap();
|
||||
//!
|
||||
//! match m3u8_rs::parse_playlist(&bytes) {
|
||||
//! Result::Ok((i, Playlist::MasterPlaylist(pl))) => println!("Master playlist:\n{:?}", pl),
|
||||
//! Result::Ok((i, Playlist::MediaPlaylist(pl))) => println!("Media playlist:\n{:?}", pl),
|
||||
//! Result::Err(e) => panic!("Parsing error: \n{}", e),
|
||||
//! }
|
||||
//! }
|
||||
//! ```
|
||||
//!
|
||||
//! Parsing a master playlist directly
|
||||
//!
|
||||
//! ```
|
||||
//! extern crate nom;
|
||||
//! extern crate m3u8_rs;
|
||||
//! use std::io::Read;
|
||||
//! use nom::IResult;
|
||||
//!
|
||||
//! fn main() {
|
||||
//! let mut file = std::fs::File::open("masterplaylist.m3u8").unwrap();
|
||||
//! let mut bytes: Vec<u8> = Vec::new();
|
||||
//! file.read_to_end(&mut bytes).unwrap();
|
||||
//!
|
||||
//! if let Result::Ok((_, pl)) = m3u8_rs::parse_master_playlist(&bytes) {
|
||||
//! println!("{:?}", pl);
|
||||
//! }
|
||||
//! }
|
||||
//!
|
||||
//! ```
|
||||
//!
|
||||
//! Creating a playlist and writing it back to a vec/file
|
||||
//!
|
||||
//! ```
|
||||
//! extern crate m3u8_rs;
|
||||
//! use m3u8_rs::playlist::{MediaPlaylist, MediaPlaylistType, MediaSegment};
|
||||
//!
|
||||
//! fn main() {
|
||||
//! let playlist = MediaPlaylist {
|
||||
//! version: 6,
|
||||
//! target_duration: 3.0,
|
||||
//! media_sequence: 338559,
|
||||
//! discontinuity_sequence: 1234,
|
||||
//! end_list: true,
|
||||
//! playlist_type: Some(MediaPlaylistType::Vod),
|
||||
//! segments: vec![
|
||||
//! MediaSegment {
|
||||
//! uri: "20140311T113819-01-338559live.ts".into(),
|
||||
//! duration: 2.002,
|
||||
//! title: Some("title".into()),
|
||||
//! ..Default::default()
|
||||
//! },
|
||||
//! ],
|
||||
//! ..Default::default()
|
||||
//! };
|
||||
//!
|
||||
//! //let mut v: Vec<u8> = Vec::new();
|
||||
//! //playlist.write_to(&mut v).unwrap();
|
||||
//!
|
||||
//! //let mut file = std::fs::File::open("playlist.m3u8").unwrap();
|
||||
//! //playlist.write_to(&mut file).unwrap();
|
||||
//! }
|
||||
//!
|
||||
//! ```
|
||||
|
||||
extern crate nom;
|
||||
|
||||
pub mod playlist;
|
||||
|
||||
use self::nom::character::complete::{digit1, multispace0, space0 };
|
||||
use self::nom::{IResult};
|
||||
use self::nom::{ delimited,none_of,peek,is_a,is_not,complete,terminated,tag,
|
||||
alt,do_parse,opt,named,map,map_res,eof,many0,take,take_until,char};
|
||||
use self::nom::combinator::map;
|
||||
use self::nom::character::complete::{line_ending, not_line_ending};
|
||||
use std::str;
|
||||
use std::f32;
|
||||
use std::string;
|
||||
use std::str::FromStr;
|
||||
use std::result::Result;
|
||||
use std::collections::HashMap;
|
||||
use playlist::*;
|
||||
|
||||
/// Parse an m3u8 playlist.
|
||||
///
|
||||
/// # Examples
|
||||
///
|
||||
/// ```
|
||||
/// use std::io::Read;
|
||||
/// use m3u8_rs::playlist::{Playlist};
|
||||
///
|
||||
/// let mut file = std::fs::File::open("playlist.m3u8").unwrap();
|
||||
/// let mut bytes: Vec<u8> = Vec::new();
|
||||
/// file.read_to_end(&mut bytes).unwrap();
|
||||
///
|
||||
/// let parsed = m3u8_rs::parse_playlist(&bytes);
|
||||
///
|
||||
/// let playlist = match parsed {
|
||||
/// Result::Ok((i, playlist)) => playlist,
|
||||
/// Result::Err(e) => panic!("Parsing error: \n{}", e),
|
||||
/// };
|
||||
///
|
||||
/// match playlist {
|
||||
/// Playlist::MasterPlaylist(pl) => println!("Master playlist:\n{:?}", pl),
|
||||
/// Playlist::MediaPlaylist(pl) => println!("Media playlist:\n{:?}", pl),
|
||||
/// }
|
||||
/// ```
|
||||
pub fn parse_playlist(input: &[u8]) -> IResult<&[u8], Playlist> {
|
||||
match is_master_playlist(input) {
|
||||
true => map(parse_master_playlist, Playlist::MasterPlaylist)(input),
|
||||
false =>map(parse_media_playlist, Playlist::MediaPlaylist)(input),
|
||||
}
|
||||
}
|
||||
|
||||
/// Parses an m3u8 playlist just like `parse_playlist`, except that this returns an [std::result::Result](std::result::Result) instead of a [nom::IResult](https://docs.rs/nom/1.2.3/nom/enum.IResult.html).
|
||||
/// However, since [nom::IResult](nom::IResult) is now an [alias to Result](https://github.com/Geal/nom/blob/master/doc/upgrading_to_nom_5.md), this is no longer needed.
|
||||
///
|
||||
/// # Examples
|
||||
///
|
||||
/// ```
|
||||
/// use m3u8_rs::playlist::{Playlist};
|
||||
/// use std::io::Read;
|
||||
///
|
||||
/// let mut file = std::fs::File::open("playlist.m3u8").unwrap();
|
||||
/// let mut bytes: Vec<u8> = Vec::new();
|
||||
/// file.read_to_end(&mut bytes).unwrap();
|
||||
///
|
||||
/// let parsed = m3u8_rs::parse_playlist_res(&bytes);
|
||||
///
|
||||
/// match parsed {
|
||||
/// Ok(Playlist::MasterPlaylist(pl)) => println!("Master playlist:\n{:?}", pl),
|
||||
/// Ok(Playlist::MediaPlaylist(pl)) => println!("Media playlist:\n{:?}", pl),
|
||||
/// Err(e) => println!("Error: {:?}", e)
|
||||
/// }
|
||||
/// ```
|
||||
pub fn parse_playlist_res(input: &[u8]) -> Result<Playlist, IResult<&[u8], Playlist>> {
|
||||
let parse_result = parse_playlist(input);
|
||||
match parse_result {
|
||||
IResult::Ok((_, playlist)) => Ok(playlist),
|
||||
_ => Err(parse_result),
|
||||
}
|
||||
}
|
||||
|
||||
/// Parse input as a master playlist
|
||||
pub fn parse_master_playlist(input: &[u8]) -> IResult<&[u8], MasterPlaylist> {
|
||||
map(parse_master_playlist_tags, master_playlist_from_tags)(input)
|
||||
}
|
||||
|
||||
/// Parse input as a master playlist
|
||||
pub fn parse_master_playlist_res(input: &[u8]) -> Result<MasterPlaylist, IResult<&[u8], MasterPlaylist>> {
|
||||
let parse_result = parse_master_playlist(input);
|
||||
match parse_result {
|
||||
IResult::Ok((_, playlist)) => Ok(playlist),
|
||||
_ => Err(parse_result),
|
||||
}
|
||||
}
|
||||
|
||||
/// Parse input as a media playlist
|
||||
pub fn parse_media_playlist(input: &[u8]) -> IResult<&[u8], MediaPlaylist> {
|
||||
map(parse_media_playlist_tags, media_playlist_from_tags)(input)
|
||||
}
|
||||
|
||||
/// Parse input as a media playlist
|
||||
pub fn parse_media_playlist_res(input: &[u8]) -> Result<MediaPlaylist, IResult<&[u8], MediaPlaylist>> {
|
||||
let parse_result = parse_media_playlist(input);
|
||||
match parse_result {
|
||||
IResult::Ok((_, playlist)) => Ok(playlist),
|
||||
_ => Err(parse_result),
|
||||
}
|
||||
}
|
||||
|
||||
/// When a media tag or no master tag is found, this returns false.
|
||||
pub fn is_master_playlist(input: &[u8]) -> bool {
|
||||
// Assume it's not a master playlist
|
||||
contains_master_tag(input).map(|t| t.0).unwrap_or(false)
|
||||
}
|
||||
|
||||
/// Scans input looking for either a master or media `#EXT` tag.
|
||||
///
|
||||
/// Returns `Some(true/false)` when a master/media tag is found. Otherwise returns `None`.
|
||||
///
|
||||
/// - None: Unkown tag or empty line
|
||||
/// - Some(true, tagstring): Line contains a master playlist tag
|
||||
/// - Some(false, tagstring): Line contains a media playlist tag
|
||||
pub fn contains_master_tag(input: &[u8]) -> Option<(bool, String)> {
|
||||
|
||||
let mut is_master_opt = None;
|
||||
let mut current_input: &[u8] = input;
|
||||
|
||||
while is_master_opt == None {
|
||||
match is_master_playlist_tag_line(current_input) {
|
||||
IResult::Ok((rest, result)) => {
|
||||
current_input = rest;
|
||||
is_master_opt = result; // result can be None (no media or master tag found)
|
||||
}
|
||||
_ => break, // Parser error encountered, can't read any more lines.
|
||||
}
|
||||
}
|
||||
|
||||
is_master_opt
|
||||
}
|
||||
|
||||
named!(pub is_master_playlist_tag_line(&[u8]) -> Option<(bool, String)>,
|
||||
do_parse!(
|
||||
opt!(is_a!("\r\n"))
|
||||
>> tag: opt!(alt!(
|
||||
map!(tag!("#EXT-X-STREAM-INF"), |t| (true, t))
|
||||
| map!(tag!("#EXT-X-I-FRAME-STREAM-INF"), |t| (true, t))
|
||||
| map!(terminated!(tag!("#EXT-X-MEDIA"), is_not!("-")), |t| (true, t)) // terminated!() to prevent matching with #EXT-X-MEDIA-SEQUENCE for which we have a separate pattern below
|
||||
| map!(tag!("#EXT-X-SESSION-KEY"), |t| (true, t))
|
||||
| map!(tag!("#EXT-X-SESSION-DATA"), |t| (true, t))
|
||||
|
||||
| map!(tag!("#EXT-X-TARGETDURATION"), |t| (false, t))
|
||||
| map!(tag!("#EXT-X-MEDIA-SEQUENCE"), |t| (false, t))
|
||||
| map!(tag!("#EXT-X-DISCONTINUITY-SEQUENCE"), |t| (false, t))
|
||||
| map!(tag!("#EXT-X-ENDLIST"), |t| (false, t))
|
||||
| map!(tag!("#EXT-X-PLAYLIST-TYPE"), |t| (false, t))
|
||||
| map!(tag!("#EXT-X-I-FRAMES-ONLY"), |t| (false, t))
|
||||
|
||||
| map!(tag!("#EXTINF"), |t| (false, t))
|
||||
| map!(tag!("#EXT-X-BYTERANGE"), |t| (false, t))
|
||||
| map!(tag!("#EXT-X-DISCONTINUITY"), |t| (false, t))
|
||||
| map!(tag!("#EXT-X-KEY"), |t| (false, t))
|
||||
| map!(tag!("#EXT-X-MAP"), |t| (false, t))
|
||||
| map!(tag!("#EXT-X-PROGRAM-DATE-TIME"), |t| (false, t))
|
||||
| map!(tag!("#EXT-X-DATERANGE"), |t| (false, t))
|
||||
))
|
||||
>> consume_line
|
||||
>>
|
||||
( {
|
||||
tag.map(|(a,b)| (a, from_utf8_slice(b).unwrap()))
|
||||
} )
|
||||
)
|
||||
);
|
||||
|
||||
// -----------------------------------------------------------------------------------------------
|
||||
// Master Playlist Tags
|
||||
// -----------------------------------------------------------------------------------------------
|
||||
|
||||
pub fn parse_master_playlist_tags(input: &[u8]) -> IResult<&[u8], Vec<MasterPlaylistTag>> {
|
||||
do_parse!(input,
|
||||
tags: many0!(complete!(do_parse!( m : master_playlist_tag >> multispace0 >> (m) )))
|
||||
>> opt!(eof!())
|
||||
>>
|
||||
( {let mut tags_rev: Vec<MasterPlaylistTag> = tags; tags_rev.reverse(); tags_rev } )
|
||||
)
|
||||
}
|
||||
|
||||
|
||||
/// Contains all the tags required to parse a master playlist.
|
||||
#[derive(Debug)]
|
||||
pub enum MasterPlaylistTag {
|
||||
M3U(String),
|
||||
Version(usize),
|
||||
VariantStream(VariantStream),
|
||||
AlternativeMedia(AlternativeMedia),
|
||||
SessionData(SessionData),
|
||||
SessionKey(SessionKey),
|
||||
Start(Start),
|
||||
IndependentSegments,
|
||||
Unknown(ExtTag),
|
||||
Comment(String),
|
||||
Uri(String),
|
||||
}
|
||||
|
||||
pub fn master_playlist_tag(input: &[u8]) -> IResult<&[u8], MasterPlaylistTag> {
|
||||
alt!(input,
|
||||
map!(m3u_tag, MasterPlaylistTag::M3U)
|
||||
| map!(version_tag, MasterPlaylistTag::Version)
|
||||
|
||||
| map!(variant_stream_tag, MasterPlaylistTag::VariantStream)
|
||||
| map!(variant_i_frame_stream_tag, MasterPlaylistTag::VariantStream)
|
||||
| map!(alternative_media_tag, MasterPlaylistTag::AlternativeMedia)
|
||||
| map!(session_data_tag, MasterPlaylistTag::SessionData)
|
||||
| map!(session_key_tag, MasterPlaylistTag::SessionKey)
|
||||
| map!(start_tag, MasterPlaylistTag::Start)
|
||||
| map!(tag!("#EXT-X-INDEPENDENT-SEGMENTS"), |_| MasterPlaylistTag::IndependentSegments)
|
||||
|
||||
| map!(ext_tag, MasterPlaylistTag::Unknown)
|
||||
| map!(comment_tag, MasterPlaylistTag::Comment)
|
||||
|
||||
| map!(consume_line, MasterPlaylistTag::Uri)
|
||||
)
|
||||
}
|
||||
|
||||
pub fn master_playlist_from_tags(mut tags: Vec<MasterPlaylistTag>) -> MasterPlaylist {
|
||||
let mut master_playlist = MasterPlaylist::default();
|
||||
|
||||
while let Some(tag) = tags.pop() {
|
||||
match tag {
|
||||
MasterPlaylistTag::Version(v) => {
|
||||
master_playlist.version = v;
|
||||
}
|
||||
MasterPlaylistTag::AlternativeMedia(v) => {
|
||||
master_playlist.alternatives.push(v);
|
||||
}
|
||||
MasterPlaylistTag::VariantStream(stream) => {
|
||||
master_playlist.variants.push(stream);
|
||||
}
|
||||
MasterPlaylistTag::Uri(uri) => {
|
||||
if let Some(stream) = master_playlist.get_newest_variant() {
|
||||
stream.uri = uri;
|
||||
}
|
||||
}
|
||||
MasterPlaylistTag::SessionData(data) => {
|
||||
master_playlist.session_data.push(data);
|
||||
}
|
||||
MasterPlaylistTag::SessionKey(key) => {
|
||||
master_playlist.session_key.push(key);
|
||||
}
|
||||
MasterPlaylistTag::Start(s) => {
|
||||
master_playlist.start = Some(s);
|
||||
}
|
||||
MasterPlaylistTag::IndependentSegments => {
|
||||
master_playlist.independent_segments = true;
|
||||
}
|
||||
MasterPlaylistTag::Unknown(unknown) => {
|
||||
master_playlist.unknown_tags.push(unknown);
|
||||
}
|
||||
_ => (),
|
||||
}
|
||||
}
|
||||
|
||||
master_playlist
|
||||
}
|
||||
|
||||
|
||||
named!(pub variant_stream_tag<VariantStream>,
|
||||
do_parse!(tag!("#EXT-X-STREAM-INF:") >> attributes: key_value_pairs >>
|
||||
( VariantStream::from_hashmap(attributes, false)))
|
||||
);
|
||||
|
||||
named!(pub variant_i_frame_stream_tag<VariantStream>,
|
||||
do_parse!( tag!("#EXT-X-I-FRAME-STREAM-INF:") >> attributes: key_value_pairs >>
|
||||
( VariantStream::from_hashmap(attributes, true)))
|
||||
);
|
||||
|
||||
named!(pub alternative_media_tag<AlternativeMedia>,
|
||||
do_parse!( tag!("#EXT-X-MEDIA:") >> attributes: key_value_pairs >>
|
||||
( AlternativeMedia::from_hashmap(attributes)))
|
||||
);
|
||||
|
||||
named!(pub session_data_tag<SessionData>,
|
||||
do_parse!( tag!("#EXT-X-SESSION-DATA:") >>
|
||||
session_data: map_res!(key_value_pairs, |attrs| SessionData::from_hashmap(attrs)) >>
|
||||
( session_data))
|
||||
);
|
||||
|
||||
named!(pub session_key_tag<SessionKey>,
|
||||
do_parse!( tag!("#EXT-X-SESSION-KEY:") >> session_key: map!(key, SessionKey) >>
|
||||
( session_key))
|
||||
);
|
||||
|
||||
// -----------------------------------------------------------------------------------------------
|
||||
// Media Playlist
|
||||
// -----------------------------------------------------------------------------------------------
|
||||
|
||||
pub fn parse_media_playlist_tags(input: &[u8]) -> IResult<&[u8], Vec<MediaPlaylistTag>> {
|
||||
do_parse!(input,
|
||||
tags: many0!(complete!(do_parse!(m:media_playlist_tag >> multispace0 >> (m) ))) >> opt!(eof!())
|
||||
>>
|
||||
( {let mut tags_rev: Vec<MediaPlaylistTag> = tags; tags_rev.reverse(); tags_rev } )
|
||||
)
|
||||
}
|
||||
|
||||
/// Contains all the tags required to parse a media playlist.
|
||||
#[derive(Debug)]
|
||||
pub enum MediaPlaylistTag {
|
||||
M3U(String),
|
||||
Version(usize),
|
||||
Segment(SegmentTag),
|
||||
TargetDuration(f32),
|
||||
MediaSequence(i32),
|
||||
DiscontinuitySequence(i32),
|
||||
EndList,
|
||||
PlaylistType(MediaPlaylistType),
|
||||
IFramesOnly,
|
||||
Start(Start),
|
||||
IndependentSegments,
|
||||
}
|
||||
|
||||
pub fn media_playlist_tag(input: &[u8]) -> IResult<&[u8], MediaPlaylistTag> {
|
||||
alt!(input,
|
||||
map!(m3u_tag, MediaPlaylistTag::M3U)
|
||||
| map!(version_tag, MediaPlaylistTag::Version)
|
||||
|
||||
| map!(do_parse!(tag!("#EXT-X-TARGETDURATION:") >> n:float >> (n)), MediaPlaylistTag::TargetDuration)
|
||||
| map!(do_parse!(tag!("#EXT-X-MEDIA-SEQUENCE:") >> n:number >> (n)), MediaPlaylistTag::MediaSequence)
|
||||
| map!(do_parse!(tag!("#EXT-X-DISCONTINUITY-SEQUENCE:") >> n:number >> (n)), MediaPlaylistTag::DiscontinuitySequence)
|
||||
| map!(do_parse!(tag!("#EXT-X-PLAYLIST-TYPE:") >> t:playlist_type >> (t)), MediaPlaylistTag::PlaylistType)
|
||||
| map!(tag!("#EXT-X-I-FRAMES-ONLY"), |_| MediaPlaylistTag::IFramesOnly)
|
||||
| map!(start_tag, MediaPlaylistTag::Start)
|
||||
| map!(tag!("#EXT-X-INDEPENDENT-SEGMENTS"), |_| MediaPlaylistTag::IndependentSegments)
|
||||
| map!(tag!("#EXT-X-ENDLIST"), |_| MediaPlaylistTag::EndList)
|
||||
|
||||
| map!(media_segment_tag, MediaPlaylistTag::Segment)
|
||||
)
|
||||
}
|
||||
|
||||
pub fn media_playlist_from_tags(mut tags: Vec<MediaPlaylistTag>) -> MediaPlaylist {
|
||||
let mut media_playlist = MediaPlaylist::default();
|
||||
let mut next_segment = MediaSegment::empty();
|
||||
let mut encryption_key = None;
|
||||
let mut map = None;
|
||||
|
||||
while let Some(tag) = tags.pop() {
|
||||
|
||||
match tag {
|
||||
MediaPlaylistTag::Version(v) => {
|
||||
media_playlist.version = v;
|
||||
}
|
||||
MediaPlaylistTag::TargetDuration(d) => {
|
||||
media_playlist.target_duration = d;
|
||||
}
|
||||
MediaPlaylistTag::MediaSequence(n) => {
|
||||
media_playlist.media_sequence = n;
|
||||
}
|
||||
MediaPlaylistTag::DiscontinuitySequence(n) => {
|
||||
media_playlist.discontinuity_sequence = n;
|
||||
}
|
||||
MediaPlaylistTag::EndList => {
|
||||
media_playlist.end_list = true;
|
||||
}
|
||||
MediaPlaylistTag::PlaylistType(t) => {
|
||||
media_playlist.playlist_type = Some(t);
|
||||
}
|
||||
MediaPlaylistTag::IFramesOnly => {
|
||||
media_playlist.i_frames_only = true;
|
||||
}
|
||||
MediaPlaylistTag::Start(s) => {
|
||||
media_playlist.start = Some(s);
|
||||
}
|
||||
MediaPlaylistTag::IndependentSegments => {
|
||||
media_playlist.independent_segments = true;
|
||||
}
|
||||
MediaPlaylistTag::Segment(segment_tag) => {
|
||||
match segment_tag {
|
||||
SegmentTag::Extinf(d, t) => {
|
||||
next_segment.duration = d;
|
||||
next_segment.title = t;
|
||||
}
|
||||
SegmentTag::ByteRange(b) => {
|
||||
next_segment.byte_range = Some(b);
|
||||
}
|
||||
SegmentTag::Discontinuity => {
|
||||
next_segment.discontinuity = true;
|
||||
}
|
||||
SegmentTag::Key(k) => {
|
||||
encryption_key = Some(k);
|
||||
}
|
||||
SegmentTag::Map(m) => {
|
||||
map = Some(m);
|
||||
}
|
||||
SegmentTag::ProgramDateTime(d) => {
|
||||
next_segment.program_date_time = Some(d);
|
||||
}
|
||||
SegmentTag::DateRange(d) => {
|
||||
next_segment.daterange = Some(d);
|
||||
}
|
||||
SegmentTag::Unknown(t) => {
|
||||
media_playlist.unknown_tags.push(t);
|
||||
}
|
||||
SegmentTag::Uri(u) => {
|
||||
next_segment.key = encryption_key.clone();
|
||||
next_segment.map = map.clone();
|
||||
next_segment.uri = u;
|
||||
media_playlist.segments.push(next_segment);
|
||||
next_segment = MediaSegment::empty();
|
||||
encryption_key = None;
|
||||
map = None;
|
||||
}
|
||||
_ => (),
|
||||
}
|
||||
}
|
||||
_ => (),
|
||||
}
|
||||
}
|
||||
media_playlist
|
||||
}
|
||||
|
||||
named!(pub playlist_type<MediaPlaylistType>,
|
||||
map_res!(
|
||||
do_parse!(
|
||||
p: map_res!(is_not!("\r\n"), str::from_utf8)
|
||||
>> take!(1)
|
||||
>> (p)
|
||||
),
|
||||
MediaPlaylistType::from_str
|
||||
)
|
||||
);
|
||||
|
||||
// -----------------------------------------------------------------------------------------------
|
||||
// Media Segment
|
||||
// -----------------------------------------------------------------------------------------------
|
||||
|
||||
/// All possible media segment tags.
|
||||
#[derive(Debug)]
|
||||
pub enum SegmentTag {
|
||||
Extinf(f32, Option<String>),
|
||||
ByteRange(ByteRange),
|
||||
Discontinuity,
|
||||
Key(Key),
|
||||
Map(Map),
|
||||
ProgramDateTime(String),
|
||||
DateRange(String),
|
||||
Unknown(ExtTag),
|
||||
Comment(String),
|
||||
Uri(String),
|
||||
}
|
||||
|
||||
pub fn media_segment_tag(input: &[u8]) -> IResult<&[u8], SegmentTag> {
|
||||
alt!(input,
|
||||
map!(do_parse!(tag!("#EXTINF:") >> e:duration_title_tag >> (e)), |(a,b)| SegmentTag::Extinf(a,b))
|
||||
| map!(do_parse!(tag!("#EXT-X-BYTERANGE:") >> r:byte_range_val >> (r)), SegmentTag::ByteRange)
|
||||
| map!(tag!("#EXT-X-DISCONTINUITY"), |_| SegmentTag::Discontinuity)
|
||||
| map!(do_parse!(tag!("#EXT-X-KEY:") >> k: key >> (k)), SegmentTag::Key)
|
||||
| map!(do_parse!(tag!("#EXT-X-MAP:") >> m: extmap >> (m)), SegmentTag::Map)
|
||||
| map!(do_parse!(tag!("#EXT-X-PROGRAM-DATE-TIME:") >> t:consume_line >> (t)), SegmentTag::ProgramDateTime)
|
||||
| map!(do_parse!(tag!("#EXT-X-DATE-RANGE:") >> t:consume_line >> (t)), SegmentTag::DateRange)
|
||||
|
||||
| map!(ext_tag, SegmentTag::Unknown)
|
||||
| map!(comment_tag, SegmentTag::Comment)
|
||||
|
||||
| map!(consume_line, SegmentTag::Uri)
|
||||
)
|
||||
}
|
||||
|
||||
named!(pub duration_title_tag<(f32, Option<String>)>,
|
||||
do_parse!(
|
||||
duration: float
|
||||
>> opt!(tag!(","))
|
||||
>> title: opt!(map_res!(is_not!("\r\n,"), from_utf8_slice))
|
||||
>> take!(1)
|
||||
>> opt!(tag!(","))
|
||||
>>
|
||||
(duration, title)
|
||||
)
|
||||
);
|
||||
|
||||
named!(pub key<Key>, map!(key_value_pairs, Key::from_hashmap));
|
||||
|
||||
named!(pub extmap<Map>, map!(key_value_pairs, |attrs| Map {
|
||||
uri: attrs.get("URI").map(|u| u.clone()).unwrap_or_default(),
|
||||
byte_range: attrs.get("BYTERANGE").map(|range| {
|
||||
match byte_range_val(range.as_bytes()) {
|
||||
IResult::Ok((_, br)) => br,
|
||||
_ => panic!("Should not happen"),
|
||||
}
|
||||
}),
|
||||
}));
|
||||
|
||||
// -----------------------------------------------------------------------------------------------
|
||||
// Basic tags
|
||||
// -----------------------------------------------------------------------------------------------
|
||||
|
||||
named!(pub m3u_tag<String>,
|
||||
map_res!(tag!("#EXTM3U"), from_utf8_slice)
|
||||
);
|
||||
|
||||
named!(pub version_tag<usize>,
|
||||
do_parse!(
|
||||
tag!("#EXT-X-VERSION:") >> version: map_res!(digit1, str::from_utf8) >>
|
||||
(version.parse().unwrap_or_default())
|
||||
)
|
||||
);
|
||||
|
||||
named!(pub start_tag<Start>,
|
||||
do_parse!(tag!("#EXT-X-START:") >> attributes:key_value_pairs >>
|
||||
(Start::from_hashmap(attributes))
|
||||
)
|
||||
);
|
||||
|
||||
named!(pub ext_tag<ExtTag>,
|
||||
do_parse!(
|
||||
tag!("#EXT-")
|
||||
>> tag: map_res!(take_until!(":"), from_utf8_slice)
|
||||
>> take!(1)
|
||||
>> rest: map_res!(is_not!("\r\n"), from_utf8_slice)
|
||||
>> take!(1)
|
||||
>>
|
||||
(ExtTag { tag: tag, rest: rest })
|
||||
)
|
||||
);
|
||||
|
||||
named!(pub comment_tag<String>,
|
||||
do_parse!(
|
||||
tag!("#") >> text: map_res!(is_not!("\r\n"), from_utf8_slice)
|
||||
>> take!(1)
|
||||
>> (text)
|
||||
)
|
||||
);
|
||||
|
||||
// -----------------------------------------------------------------------------------------------
|
||||
// Util
|
||||
// -----------------------------------------------------------------------------------------------
|
||||
|
||||
named!(pub key_value_pairs(&[u8]) -> HashMap<String, String>,
|
||||
map!(
|
||||
many0!(do_parse!(space0 >> k:key_value_pair >> (k) ))
|
||||
,
|
||||
|pairs: Vec<(String, String)>| {
|
||||
pairs.into_iter().collect()
|
||||
}
|
||||
)
|
||||
);
|
||||
|
||||
named!(pub key_value_pair(&[u8]) -> (String, String),
|
||||
do_parse!(
|
||||
peek!(none_of!("\r\n"))
|
||||
>> left: map_res!(take_until!("="), from_utf8_slice)
|
||||
>> take!(1)
|
||||
>> right: alt!(quoted | unquoted)
|
||||
>> opt!(char!(','))
|
||||
>>
|
||||
(left, right)
|
||||
)
|
||||
);
|
||||
|
||||
named!(pub quoted<String>,
|
||||
delimited!(char!('\"'), map_res!(is_not!("\""), from_utf8_slice), char!('\"'))
|
||||
);
|
||||
|
||||
named!(pub unquoted<String>,
|
||||
map_res!(is_not!(",\r\n"), from_utf8_slice)
|
||||
);
|
||||
|
||||
named!(pub consume_line<String>,
|
||||
do_parse!(
|
||||
line: map_res!(not_line_ending, from_utf8_slice)
|
||||
>> opt!(line_ending)
|
||||
>> (line)
|
||||
)
|
||||
);
|
||||
|
||||
named!(pub number<i32>,
|
||||
map_res!(map_res!(digit1, str::from_utf8), str::FromStr::from_str)
|
||||
);
|
||||
|
||||
named!(pub byte_range_val<ByteRange>,
|
||||
do_parse!(
|
||||
n: number
|
||||
>> o: opt!(do_parse!(char!('@') >> n:number >> (n) )) >>
|
||||
(ByteRange { length: n, offset: o })
|
||||
)
|
||||
);
|
||||
|
||||
named!(pub float<f32>,
|
||||
do_parse!(
|
||||
left: map_res!(digit1, str::from_utf8)
|
||||
>> right_opt: opt!(do_parse!(char!('.') >> d:map_res!(digit1, str::from_utf8) >> (d) ))
|
||||
>>
|
||||
(
|
||||
match right_opt {
|
||||
Some(right) => {
|
||||
let mut num = String::from(left);
|
||||
num.push('.');
|
||||
num.push_str(right);
|
||||
num.parse().unwrap()
|
||||
},
|
||||
None => left.parse().unwrap(),
|
||||
})
|
||||
)
|
||||
);
|
||||
|
||||
pub fn from_utf8_slice(s: &[u8]) -> Result<String, string::FromUtf8Error> {
|
||||
String::from_utf8(s.to_vec())
|
||||
}
|
||||
Loading…
Reference in a new issue