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/*
This file is part of jellything (https://codeberg.org/metamuffin/jellything)
which is licensed under the GNU Affero General Public License (version 3); see /COPYING.
Copyright (C) 2025 metamuffin <metamuffin.org>
*/
use serde::{Deserialize, Serialize};
use std::{collections::BTreeMap, fmt::Display, str::FromStr};
pub type SegmentNum = usize;
pub type TrackNum = usize;
pub type FormatNum = usize;
pub type IndexNum = usize;
#[derive(Debug, Clone, Deserialize, Serialize)]
pub enum StreamSpec {
Whep {
track: TrackNum,
seek: u64,
},
WhepControl {
token: String,
},
Remux {
tracks: Vec<usize>,
container: StreamContainer,
},
Original {
track: TrackNum,
},
HlsSuperMultiVariant {
container: StreamContainer,
},
HlsMultiVariant {
segment: SegmentNum,
container: StreamContainer,
},
HlsVariant {
segment: SegmentNum,
track: TrackNum,
container: StreamContainer,
format: FormatNum,
},
Info {
segment: Option<u64>,
},
FragmentIndex {
segment: SegmentNum,
track: TrackNum,
},
Fragment {
segment: SegmentNum,
track: TrackNum,
index: IndexNum,
container: StreamContainer,
format: FormatNum,
},
// Track {
// segment: SegmentNum,
// track: TrackNum,
// container: StreamContainer,
// foramt: FormatNum,
// },
}
#[derive(Debug, Clone, Deserialize, Serialize)]
pub struct StreamInfo {
pub name: Option<String>,
pub segments: Vec<StreamSegmentInfo>,
}
#[derive(Debug, Clone, Deserialize, Serialize)]
pub struct StreamSegmentInfo {
pub name: Option<String>,
pub duration: f64,
pub tracks: Vec<StreamTrackInfo>,
}
#[derive(Debug, Clone, Deserialize, Serialize)]
pub struct StreamTrackInfo {
pub name: Option<String>,
pub kind: TrackKind,
pub formats: Vec<StreamFormatInfo>,
}
#[derive(Debug, Copy, Clone, PartialEq, Eq, Deserialize, Serialize)]
#[serde(rename_all = "snake_case")]
pub enum TrackKind {
Video,
Audio,
Subtitle,
}
#[derive(Debug, Clone, Deserialize, Serialize, Default)]
pub struct StreamFormatInfo {
pub codec: String,
pub bitrate: f64,
pub remux: bool,
pub containers: Vec<StreamContainer>,
pub width: Option<u64>,
pub height: Option<u64>,
pub samplerate: Option<f64>,
pub channels: Option<usize>,
pub bit_depth: Option<u8>,
}
#[derive(Debug, Clone, Copy, PartialEq, Eq, Deserialize, Serialize)]
#[serde(rename_all = "lowercase")]
pub enum StreamContainer {
WebM,
Matroska,
WebVTT,
MPEG4,
JVTT,
}
impl StreamSpec {
pub fn to_query(&self) -> String {
match self {
StreamSpec::Whep { track, seek } => format!("?whep&track={track}&seek={seek}"),
StreamSpec::WhepControl { token } => format!("?whepcontrol&token={token}"),
StreamSpec::Remux { tracks, container } => {
format!(
"?remux&tracks={}&container={container}",
tracks
.iter()
.map(|t| t.to_string())
.collect::<Vec<String>>()
.join(",")
)
}
StreamSpec::Original { track } => format!("?original&track={track}"),
StreamSpec::HlsSuperMultiVariant { container } => {
format!("?hlssupermultivariant&container={container}")
}
StreamSpec::HlsMultiVariant { segment, container } => {
format!("?hlsmultivariant&segment={segment}&container={container}")
}
StreamSpec::HlsVariant {
segment,
track,
container,
format,
} => format!(
"?hlsvariant&segment={segment}&track={track}&container={container}&format={format}"
),
StreamSpec::Info {
segment: Some(segment),
} => format!("?info&segment={segment}"),
StreamSpec::Info { segment: None } => "?info".to_string(),
StreamSpec::FragmentIndex { segment, track } => {
format!("?fragmentindex&segment={segment}&track={track}")
}
StreamSpec::Fragment {
segment,
track,
index,
container,
format,
} => format!("?fragment&segment={segment}&track={track}&index={index}&container={container}&format={format}"),
}
}
pub fn from_query_kv(query: &BTreeMap<String, String>) -> Result<Self, &'static str> {
let get_num = |k: &'static str| {
query
.get(k)
.ok_or(k)
.and_then(|a| a.parse().map_err(|_| "invalid number"))
};
let get_container = || {
query
.get("container")
.ok_or("container")
.and_then(|s| s.parse().map_err(|()| "unknown container"))
};
if query.contains_key("info") {
Ok(Self::Info {
segment: get_num("segment").ok(),
})
} else if query.contains_key("hlssupermultivariant") {
Ok(Self::HlsSuperMultiVariant {
container: get_container().ok().unwrap_or(StreamContainer::Matroska),
})
} else if query.contains_key("hlsmultivariant") {
Ok(Self::HlsMultiVariant {
segment: get_num("segment")? as SegmentNum,
container: get_container()?,
})
} else if query.contains_key("hlsvariant") {
Ok(Self::HlsVariant {
segment: get_num("segment")? as SegmentNum,
track: get_num("track")? as TrackNum,
format: get_num("format")? as FormatNum,
container: get_container()?,
})
} else if query.contains_key("fragment") {
Ok(Self::Fragment {
segment: get_num("segment")? as SegmentNum,
track: get_num("track")? as TrackNum,
format: get_num("format")? as FormatNum,
index: get_num("index")? as IndexNum,
container: get_container()?,
})
} else if query.contains_key("fragmentindex") {
Ok(Self::FragmentIndex {
segment: get_num("segment")? as SegmentNum,
track: get_num("track")? as TrackNum,
})
} else {
Err("invalid stream spec")
}
}
}
impl Display for StreamContainer {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
f.write_str(match self {
StreamContainer::WebM => "webm",
StreamContainer::Matroska => "matroska",
StreamContainer::WebVTT => "webvtt",
StreamContainer::JVTT => "jvtt",
StreamContainer::MPEG4 => "mpeg4",
})
}
}
impl FromStr for StreamContainer {
type Err = ();
fn from_str(s: &str) -> Result<Self, Self::Err> {
Ok(match s {
"webm" => StreamContainer::WebM,
"matroska" => StreamContainer::Matroska,
"webvtt" => StreamContainer::WebVTT,
"jvtt" => StreamContainer::JVTT,
"mpeg4" => StreamContainer::MPEG4,
_ => return Err(()),
})
}
}
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