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Add ExtXMediaBuilder

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This commit is contained in:
Takeru Ohta 2018-02-15 05:16:37 +09:00
parent 4315081ff1
commit 0210fce925
1 changed files with 182 additions and 55 deletions
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237
src/tags/master_playlist.rs
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@ -7,11 +7,155 @@ use types::{ClosedCaptions, DecimalFloatingPoint, DecimalResolution, DecryptionK
InStreamId, MediaType, ProtocolVersion, QuotedString, SessionData, SingleLineString};
use super::{parse_yes_or_no, parse_u64};
/// `ExtXMedia` builder.
#[derive(Debug, Clone)]
pub struct ExtXMediaBuilder {
media_type: Option<MediaType>,
uri: Option<QuotedString>,
group_id: Option<QuotedString>,
language: Option<QuotedString>,
assoc_language: Option<QuotedString>,
name: Option<QuotedString>,
default: bool,
autoselect: Option<bool>,
forced: Option<bool>,
instream_id: Option<InStreamId>,
characteristics: Option<QuotedString>,
channels: Option<QuotedString>,
}
impl ExtXMediaBuilder {
/// Makes a `ExtXMediaBuilder` instance.
pub fn new() -> Self {
ExtXMediaBuilder {
media_type: None,
uri: None,
group_id: None,
language: None,
assoc_language: None,
name: None,
default: false,
autoselect: None,
forced: None,
instream_id: None,
characteristics: None,
channels: None,
}
}
/// Sets the media type of the rendition.
pub fn media_type(&mut self, media_type: MediaType) -> &mut Self {
self.media_type = Some(media_type);
self
}
/// Sets the identifier that specifies the group to which the rendition belongs.
pub fn group_id(&mut self, group_id: QuotedString) -> &mut Self {
self.group_id = Some(group_id);
self
}
/// Sets a human-readable description of the rendition.
pub fn name(&mut self, name: QuotedString) -> &mut Self {
self.name = Some(name);
self
}
/// Sets the URI that identifies the media playlist.
pub fn uri(&mut self, uri: QuotedString) -> &mut Self {
self.uri = Some(uri);
self
}
/// Sets the name of the primary language used in the rendition.
pub fn language(&mut self, language: QuotedString) -> &mut Self {
self.language = Some(language);
self
}
/// Sets the name of a language associated with the rendition.
pub fn assoc_language(&mut self, language: QuotedString) -> &mut Self {
self.assoc_language = Some(language);
self
}
/// Sets the value of the `default` flag.
pub fn default(&mut self, b: bool) -> &mut Self {
self.default = b;
self
}
/// Sets the value of the `autoselect` flag.
pub fn autoselect(&mut self, b: bool) -> &mut Self {
self.autoselect = Some(b);
self
}
/// Sets the value of the `forced` flag.
pub fn forced(&mut self, b: bool) -> &mut Self {
self.forced = Some(b);
self
}
/// Sets the identifier that specifies a rendition within the segments in the media playlist.
pub fn instream_id(&mut self, id: InStreamId) -> &mut Self {
self.instream_id = Some(id);
self
}
/// Sets the string that represents uniform type identifiers (UTI).
pub fn characteristics(&mut self, characteristics: QuotedString) -> &mut Self {
self.characteristics = Some(characteristics);
self
}
/// Sets the string that represents the parameters of the rendition.
pub fn channels(&mut self, channels: QuotedString) -> &mut Self {
self.channels = Some(channels);
self
}
/// Builds a `ExtXMedia` instance.
pub fn finish(self) -> Result<ExtXMedia> {
let media_type = track_assert_some!(self.media_type, ErrorKind::InvalidInput);
let group_id = track_assert_some!(self.group_id, ErrorKind::InvalidInput);
let name = track_assert_some!(self.name, ErrorKind::InvalidInput);
if MediaType::ClosedCaptions == media_type {
track_assert_ne!(self.uri, None, ErrorKind::InvalidInput);
track_assert!(self.instream_id.is_some(), ErrorKind::InvalidInput);
} else {
track_assert!(self.instream_id.is_none(), ErrorKind::InvalidInput);
}
if self.default && self.autoselect.is_some() {
track_assert_eq!(self.autoselect, Some(true), ErrorKind::InvalidInput);
}
if MediaType::Subtitles != media_type {
track_assert_eq!(self.forced, None, ErrorKind::InvalidInput);
}
Ok(ExtXMedia {
media_type,
uri: self.uri,
group_id,
language: self.language,
assoc_language: self.assoc_language,
name,
default: self.default,
autoselect: self.autoselect.unwrap_or(false),
forced: self.forced.unwrap_or(false),
instream_id: self.instream_id,
characteristics: self.characteristics,
channels: self.channels,
})
}
}
impl Default for ExtXMediaBuilder {
fn default() -> Self {
Self::new()
}
}
/// [4.3.4.1. EXT-X-MEDIA]
///
/// [4.3.4.1. EXT-X-MEDIA]: https://tools.ietf.org/html/rfc8216#section-4.3.4.1
///
/// TODO: Add `ExtXMediaBuilder`
#[derive(Debug, Clone, PartialEq, Eq, Hash)]
pub struct ExtXMedia {
media_type: MediaType,
@ -164,72 +308,55 @@ impl FromStr for ExtXMedia {
fn from_str(s: &str) -> Result<Self> {
track_assert!(s.starts_with(Self::PREFIX), ErrorKind::InvalidInput);
let mut media_type = None;
let mut uri = None;
let mut group_id = None;
let mut language = None;
let mut assoc_language = None;
let mut name = None;
let mut default = false;
let mut autoselect = None;
let mut forced = None;
let mut instream_id = None;
let mut characteristics = None;
let mut channels = None;
let mut builder = ExtXMediaBuilder::new();
let attrs = AttributePairs::parse(s.split_at(Self::PREFIX.len()).1);
for attr in attrs {
let (key, value) = track!(attr)?;
match key {
"TYPE" => media_type = Some(track!(value.parse())?),
"URI" => uri = Some(track!(value.parse())?),
"GROUP-ID" => group_id = Some(track!(value.parse())?),
"LANGUAGE" => language = Some(track!(value.parse())?),
"ASSOC-LANGUAGE" => assoc_language = Some(track!(value.parse())?),
"NAME" => name = Some(track!(value.parse())?),
"DEFAULT" => default = track!(parse_yes_or_no(value))?,
"AUTOSELECT" => autoselect = Some(track!(parse_yes_or_no(value))?),
"FORCED" => forced = Some(track!(parse_yes_or_no(value))?),
"TYPE" => {
builder.media_type(track!(value.parse())?);
}
"URI" => {
builder.uri(track!(value.parse())?);
}
"GROUP-ID" => {
builder.group_id(track!(value.parse())?);
}
"LANGUAGE" => {
builder.language(track!(value.parse())?);
}
"ASSOC-LANGUAGE" => {
builder.assoc_language(track!(value.parse())?);
}
"NAME" => {
builder.name(track!(value.parse())?);
}
"DEFAULT" => {
builder.default(track!(parse_yes_or_no(value))?);
}
"AUTOSELECT" => {
builder.autoselect(track!(parse_yes_or_no(value))?);
}
"FORCED" => {
builder.forced(track!(parse_yes_or_no(value))?);
}
"INSTREAM-ID" => {
let s: QuotedString = track!(value.parse())?;
instream_id = Some(track!(s.parse())?);
builder.instream_id(track!(s.parse())?);
}
"CHARACTERISTICS" => {
builder.characteristics(track!(value.parse())?);
}
"CHANNELS" => {
builder.channels(track!(value.parse())?);
}
"CHARACTERISTICS" => characteristics = Some(track!(value.parse())?),
"CHANNELS" => channels = Some(track!(value.parse())?),
_ => {
// [6.3.1. General Client Responsibilities]
// > ignore any attribute/value pair with an unrecognized AttributeName.
}
}
}
let media_type = track_assert_some!(media_type, ErrorKind::InvalidInput);
let group_id = track_assert_some!(group_id, ErrorKind::InvalidInput);
let name = track_assert_some!(name, ErrorKind::InvalidInput);
if MediaType::ClosedCaptions == media_type {
track_assert_ne!(uri, None, ErrorKind::InvalidInput);
track_assert!(instream_id.is_some(), ErrorKind::InvalidInput);
} else {
track_assert!(instream_id.is_none(), ErrorKind::InvalidInput);
}
if default && autoselect.is_some() {
track_assert_eq!(autoselect, Some(true), ErrorKind::InvalidInput);
}
if MediaType::Subtitles != media_type {
track_assert_eq!(forced, None, ErrorKind::InvalidInput);
}
Ok(ExtXMedia {
media_type,
uri,
group_id,
language,
assoc_language,
name,
default,
autoselect: autoselect.unwrap_or(false),
forced: forced.unwrap_or(false),
instream_id,
characteristics,
channels,
})
track!(builder.finish())
}
}