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Refactor media_segment module

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This commit is contained in:
Takeru Ohta 2018-02-15 04:47:44 +09:00
parent c2b1dd6a45
commit 1434e6606b
4 changed files with 128 additions and 135 deletions
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5
src/lib.rs
View file

@ -13,11 +13,8 @@ extern crate trackable;
pub use error::{Error, ErrorKind};
pub use master_playlist::{MasterPlaylist, MasterPlaylistBuilder};
pub use media_playlist::{MediaPlaylist, MediaPlaylistBuilder};
pub use media_segment::{MediaSegment, MediaSegmentBuilder};
pub mod segment {
//! Media segment.
pub use super::media_segment::{MediaSegment, MediaSegmentBuilder};
}
pub mod tag; // TODO: s/tag/tags/
pub mod types;

5
src/media_playlist.rs
View file

@ -112,7 +112,7 @@ impl MediaPlaylistBuilder {
let mut last_range_uri = None;
for s in &self.segments {
// CHECK: `#EXT-X-TARGETDURATION`
let segment_duration = s.inf().duration();
let segment_duration = s.inf_tag().duration();
let segment_duration_seconds = if segment_duration.subsec_nanos() < 500_000_000 {
segment_duration.as_secs()
} else {
@ -279,7 +279,6 @@ impl FromStr for MediaPlaylist {
fn from_str(s: &str) -> Result<Self> {
let mut builder = MediaPlaylistBuilder::new();
let mut segment = MediaSegmentBuilder::new();
let mut segments = Vec::new();
let mut has_partial_segment = false;
let mut has_discontinuity_tag = false;
for (i, line) in Lines::new(s).enumerate() {
@ -394,7 +393,7 @@ impl FromStr for MediaPlaylist {
}
Line::Uri(uri) => {
segment.uri(uri);
segments.push(track!(segment.finish())?);
builder.segment(track!(segment.finish())?);
segment = MediaSegmentBuilder::new();
has_partial_segment = false;
}

179
src/media_segment.rs
View file

@ -6,107 +6,168 @@ use tag::{ExtInf, ExtXByteRange, ExtXDateRange, ExtXDiscontinuity, ExtXKey, ExtX
ExtXProgramDateTime, MediaSegmentTag};
use types::{ProtocolVersion, SingleLineString};
/// Media segment builder.
#[derive(Debug, Clone)]
pub struct MediaSegmentBuilder {
key_tags: Vec<ExtXKey>,
map_tag: Option<ExtXMap>,
byte_range_tag: Option<ExtXByteRange>,
date_range_tag: Option<ExtXDateRange>,
discontinuity_tag: Option<ExtXDiscontinuity>,
program_date_time_tag: Option<ExtXProgramDateTime>,
inf_tag: Option<ExtInf>,
uri: Option<SingleLineString>,
ext_inf: Option<ExtInf>,
ext_x_byterange: Option<ExtXByteRange>,
ext_x_daterange: Option<ExtXDateRange>,
ext_x_discontinuity: Option<ExtXDiscontinuity>,
ext_x_key: Option<ExtXKey>, // TODO: vec
ext_x_map: Option<ExtXMap>,
ext_x_program_date_time: Option<ExtXProgramDateTime>,
}
impl MediaSegmentBuilder {
/// Makes a new `MediaSegmentBuilder` instance.
pub fn new() -> Self {
MediaSegmentBuilder {
key_tags: Vec::new(),
map_tag: None,
byte_range_tag: None,
date_range_tag: None,
discontinuity_tag: None,
program_date_time_tag: None,
inf_tag: None,
uri: None,
ext_inf: None,
ext_x_byterange: None,
ext_x_daterange: None,
ext_x_discontinuity: None,
ext_x_key: None,
ext_x_map: None,
ext_x_program_date_time: None,
}
}
/// Sets the URI of the resulting media segment.
pub fn uri(&mut self, uri: SingleLineString) -> &mut Self {
self.uri = Some(uri);
self
}
/// Sets the given tag to the resulting media segment.
pub fn tag<T: Into<MediaSegmentTag>>(&mut self, tag: T) -> &mut Self {
match tag.into() {
MediaSegmentTag::ExtInf(t) => self.ext_inf = Some(t),
MediaSegmentTag::ExtXByteRange(t) => self.ext_x_byterange = Some(t),
MediaSegmentTag::ExtXDateRange(t) => self.ext_x_daterange = Some(t),
MediaSegmentTag::ExtXDiscontinuity(t) => self.ext_x_discontinuity = Some(t),
MediaSegmentTag::ExtXKey(t) => self.ext_x_key = Some(t),
MediaSegmentTag::ExtXMap(t) => self.ext_x_map = Some(t),
MediaSegmentTag::ExtXProgramDateTime(t) => self.ext_x_program_date_time = Some(t),
MediaSegmentTag::ExtInf(t) => self.inf_tag = Some(t),
MediaSegmentTag::ExtXByteRange(t) => self.byte_range_tag = Some(t),
MediaSegmentTag::ExtXDateRange(t) => self.date_range_tag = Some(t),
MediaSegmentTag::ExtXDiscontinuity(t) => self.discontinuity_tag = Some(t),
MediaSegmentTag::ExtXKey(t) => self.key_tags.push(t),
MediaSegmentTag::ExtXMap(t) => self.map_tag = Some(t),
MediaSegmentTag::ExtXProgramDateTime(t) => self.program_date_time_tag = Some(t),
}
self
}
/// Builds a `MediaSegment` instance.
pub fn finish(self) -> Result<MediaSegment> {
let uri = track_assert_some!(self.uri, ErrorKind::InvalidInput);
let ext_inf = track_assert_some!(self.ext_inf, ErrorKind::InvalidInput);
let tags = iter::empty()
.chain(self.ext_x_byterange.into_iter().map(From::from))
.chain(self.ext_x_daterange.into_iter().map(From::from))
.chain(self.ext_x_discontinuity.into_iter().map(From::from))
.chain(self.ext_x_key.into_iter().map(From::from))
.chain(self.ext_x_map.into_iter().map(From::from))
.chain(self.ext_x_program_date_time.into_iter().map(From::from))
.collect();
Ok(MediaSegment { uri, ext_inf, tags })
let inf_tag = track_assert_some!(self.inf_tag, ErrorKind::InvalidInput);
Ok(MediaSegment {
key_tags: self.key_tags,
map_tag: self.map_tag,
byte_range_tag: self.byte_range_tag,
date_range_tag: self.date_range_tag,
discontinuity_tag: self.discontinuity_tag,
program_date_time_tag: self.program_date_time_tag,
inf_tag,
uri,
})
}
}
impl Default for MediaSegmentBuilder {
fn default() -> Self {
Self::new()
}
}
/// Media segment.
#[derive(Debug, Clone)]
pub struct MediaSegment {
pub uri: SingleLineString,
pub ext_inf: ExtInf,
pub tags: Vec<MediaSegmentTag>,
key_tags: Vec<ExtXKey>,
map_tag: Option<ExtXMap>,
byte_range_tag: Option<ExtXByteRange>,
date_range_tag: Option<ExtXDateRange>,
discontinuity_tag: Option<ExtXDiscontinuity>,
program_date_time_tag: Option<ExtXProgramDateTime>,
inf_tag: ExtInf,
uri: SingleLineString,
}
impl fmt::Display for MediaSegment {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
for tag in &self.tags {
writeln!(f, "{}", tag)?;
for t in &self.key_tags {
writeln!(f, "{}", t)?;
}
writeln!(f, "{}", self.ext_inf)?;
if let Some(ref t) = self.map_tag {
writeln!(f, "{}", t)?;
}
if let Some(ref t) = self.byte_range_tag {
writeln!(f, "{}", t)?;
}
if let Some(ref t) = self.date_range_tag {
writeln!(f, "{}", t)?;
}
if let Some(ref t) = self.discontinuity_tag {
writeln!(f, "{}", t)?;
}
if let Some(ref t) = self.program_date_time_tag {
writeln!(f, "{}", t)?;
}
writeln!(f, "{}", self.inf_tag)?;
writeln!(f, "{}", self.uri)?;
Ok(())
}
}
impl MediaSegment {
pub fn requires_version(&self) -> ProtocolVersion {
// TODO:
ProtocolVersion::V1
}
pub fn uri(&self) -> &str {
/// Returns the URI of the media segment.
pub fn uri(&self) -> &SingleLineString {
&self.uri
}
pub fn inf(&self) -> &ExtInf {
&self.ext_inf
/// Returns the `EXT-X-INF` tag associated with the media segment.
pub fn inf_tag(&self) -> &ExtInf {
&self.inf_tag
}
pub fn byte_range_tag(&self) -> Option<&ExtXByteRange> {
self.tags.iter().filter_map(|t| t.as_byte_range()).nth(0)
/// Returns the `EXT-X-BYTERANGE` tag associated with the media segment.
pub fn byte_range_tag(&self) -> Option<ExtXByteRange> {
self.byte_range_tag
}
pub fn date_range(&self) -> Option<&ExtXDateRange> {
self.tags.iter().filter_map(|t| t.as_date_range()).nth(0)
/// Returns the `EXT-X-DATERANGE` tag associated with the media segment.
pub fn date_range_tag(&self) -> Option<&ExtXDateRange> {
self.date_range_tag.as_ref()
}
pub fn discontinuity(&self) -> Option<&ExtXDiscontinuity> {
self.tags.iter().filter_map(|t| t.as_discontinuity()).nth(0)
/// Returns the `EXT-X-DISCONTINUITY` tag associated with the media segment.
pub fn discontinuity_tag(&self) -> Option<ExtXDiscontinuity> {
self.discontinuity_tag
}
pub fn key(&self) -> Option<&ExtXKey> {
self.tags.iter().filter_map(|t| t.as_key()).nth(0)
/// Returns the `EXT-X-PROGRAM-DATE-TIME` tag associated with the media segment.
pub fn program_date_time_tag(&self) -> Option<ExtXProgramDateTime> {
self.program_date_time_tag
}
pub fn map(&self) -> Option<&ExtXMap> {
self.tags.iter().filter_map(|t| t.as_map()).nth(0)
/// Returns the `EXT-X-MAP` tag associated with the media segment.
pub fn map_tag(&self) -> Option<&ExtXMap> {
self.map_tag.as_ref()
}
pub fn program_date_time(&self) -> Option<&ExtXProgramDateTime> {
self.tags
.iter()
.filter_map(|t| t.as_program_date_time())
.nth(0)
/// Returns the `EXT-X-KEY` tags associated with the media segment.
pub fn key_tags(&self) -> &[ExtXKey] {
&self.key_tags
}
/// Returns the protocol compatibility version that this segment requires.
pub fn requires_version(&self) -> ProtocolVersion {
iter::empty()
.chain(self.key_tags.iter().map(|t| t.requires_version()))
.chain(self.map_tag.iter().map(|t| t.requires_version()))
.chain(self.byte_range_tag.iter().map(|t| t.requires_version()))
.chain(self.date_range_tag.iter().map(|t| t.requires_version()))
.chain(self.discontinuity_tag.iter().map(|t| t.requires_version()))
.chain(
self.program_date_time_tag
.iter()
.map(|t| t.requires_version()),
)
.chain(iter::once(self.inf_tag.requires_version()))
.max()
.expect("Never fails")
}
}

74
src/tag/mod.rs
View file

@ -1,7 +1,6 @@
//! [4.3. Playlist Tags]
//!
//! [4.3. Playlist Tags]: https://tools.ietf.org/html/rfc8216#section-4.3
use std::fmt;
use trackable::error::ErrorKindExt;
use {ErrorKind, Result};
@ -41,7 +40,7 @@ mod media_segment;
///
/// See also [4.3.5. Media or Master Playlist Tags]
///
/// [4.3.4. Master Playlist Tags] https://tools.ietf.org/html/rfc8216#section-4.3.4
/// [4.3.4. Master Playlist Tags]: https://tools.ietf.org/html/rfc8216#section-4.3.4
/// [4.3.5. Media or Master Playlist Tags]: https://tools.ietf.org/html/rfc8216#section-4.3.5
#[allow(missing_docs)]
#[derive(Debug, Clone, PartialEq, Eq)]
@ -66,7 +65,7 @@ impl_from!(MasterPlaylistTag, ExtXStart);
///
/// See also [4.3.5. Media or Master Playlist Tags]
///
/// [4.3.3. Media Playlist Tags] https://tools.ietf.org/html/rfc8216#section-4.3.3
/// [4.3.3. Media Playlist Tags]: https://tools.ietf.org/html/rfc8216#section-4.3.3
/// [4.3.5. Media or Master Playlist Tags]: https://tools.ietf.org/html/rfc8216#section-4.3.5
#[allow(missing_docs)]
#[derive(Debug, Clone, PartialEq, Eq)]
@ -89,6 +88,9 @@ impl_from!(MediaPlaylistTag, ExtXIFramesOnly);
impl_from!(MediaPlaylistTag, ExtXIndependentSegments);
impl_from!(MediaPlaylistTag, ExtXStart);
/// [4.3.2. Media Segment Tags]
///
/// [4.3.2. Media Segment Tags]: https://tools.ietf.org/html/rfc8216#section-4.3.2
#[allow(missing_docs)]
#[derive(Debug, Clone, PartialEq, Eq)]
pub enum MediaSegmentTag {
@ -100,72 +102,6 @@ pub enum MediaSegmentTag {
ExtXMap(ExtXMap),
ExtXProgramDateTime(ExtXProgramDateTime),
}
// TODO: delete
#[allow(missing_docs)]
impl MediaSegmentTag {
pub fn as_inf(&self) -> Option<&ExtInf> {
if let MediaSegmentTag::ExtInf(ref t) = *self {
Some(t)
} else {
None
}
}
pub fn as_byte_range(&self) -> Option<&ExtXByteRange> {
if let MediaSegmentTag::ExtXByteRange(ref t) = *self {
Some(t)
} else {
None
}
}
pub fn as_date_range(&self) -> Option<&ExtXDateRange> {
if let MediaSegmentTag::ExtXDateRange(ref t) = *self {
Some(t)
} else {
None
}
}
pub fn as_discontinuity(&self) -> Option<&ExtXDiscontinuity> {
if let MediaSegmentTag::ExtXDiscontinuity(ref t) = *self {
Some(t)
} else {
None
}
}
pub fn as_key(&self) -> Option<&ExtXKey> {
if let MediaSegmentTag::ExtXKey(ref t) = *self {
Some(t)
} else {
None
}
}
pub fn as_map(&self) -> Option<&ExtXMap> {
if let MediaSegmentTag::ExtXMap(ref t) = *self {
Some(t)
} else {
None
}
}
pub fn as_program_date_time(&self) -> Option<&ExtXProgramDateTime> {
if let MediaSegmentTag::ExtXProgramDateTime(ref t) = *self {
Some(t)
} else {
None
}
}
}
impl fmt::Display for MediaSegmentTag {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
match *self {
MediaSegmentTag::ExtInf(ref t) => t.fmt(f),
MediaSegmentTag::ExtXByteRange(ref t) => t.fmt(f),
MediaSegmentTag::ExtXDateRange(ref t) => t.fmt(f),
MediaSegmentTag::ExtXDiscontinuity(ref t) => t.fmt(f),
MediaSegmentTag::ExtXKey(ref t) => t.fmt(f),
MediaSegmentTag::ExtXMap(ref t) => t.fmt(f),
MediaSegmentTag::ExtXProgramDateTime(ref t) => t.fmt(f),
}
}
}
impl_from!(MediaSegmentTag, ExtInf);
impl_from!(MediaSegmentTag, ExtXByteRange);
impl_from!(MediaSegmentTag, ExtXDateRange);