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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 crate::SMediaInfo;
use anyhow::Result;
use ebml_struct::matroska::TrackEntry;
use jellybase::{
common::stream::{
StreamContainer, StreamFormatInfo, StreamInfo, StreamSegmentInfo, StreamTrackInfo,
TrackKind,
},
CONF,
};
use jellyremuxer::{
metadata::{matroska_metadata, MatroskaMetadata},
seek_index::get_track_sizes,
};
use std::{collections::BTreeMap, path::PathBuf, sync::Arc};
use tokio::{
io::{AsyncWriteExt, DuplexStream},
spawn,
task::spawn_blocking,
};
async fn async_matroska_metadata(path: PathBuf) -> Result<Arc<MatroskaMetadata>> {
spawn_blocking(move || matroska_metadata(&path)).await?
}
async fn async_get_track_sizes(path: PathBuf) -> Result<BTreeMap<u64, usize>> {
spawn_blocking(move || get_track_sizes(&path)).await?
}
pub(crate) struct InternalStreamInfo {
pub paths: Vec<PathBuf>,
pub _metadata: Vec<Arc<MatroskaMetadata>>,
pub track_to_file: Vec<(usize, u64)>,
}
// TODO cache mem
pub(crate) async fn stream_info(info: Arc<SMediaInfo>) -> Result<(InternalStreamInfo, StreamInfo)> {
let mut tracks = Vec::new();
let mut track_to_file = Vec::new();
let mut metadata_arr = Vec::new();
let mut paths = Vec::new();
for (i, path) in info.files.iter().enumerate() {
let metadata = async_matroska_metadata(path.clone()).await?;
let sizes = async_get_track_sizes(path.clone()).await?;
if let Some(t) = &metadata.tracks {
let duration = media_duration(&metadata);
for t in &t.entries {
let bitrate =
sizes.get(&t.track_number).copied().unwrap_or_default() as f64 / duration * 8.;
tracks.push(StreamTrackInfo {
name: None,
kind: match t.track_type {
1 => TrackKind::Video,
2 => TrackKind::Audio,
17 => TrackKind::Subtitle,
_ => todo!(),
},
formats: stream_formats(t, bitrate),
});
track_to_file.push((i, t.track_number));
}
}
metadata_arr.push(metadata);
paths.push(path.to_owned());
}
let segment = StreamSegmentInfo {
name: None,
duration: media_duration(&metadata_arr[0]),
tracks,
};
Ok((
InternalStreamInfo {
_metadata: metadata_arr,
paths,
track_to_file,
},
StreamInfo {
name: info.info.title.clone(),
segments: vec![segment],
},
))
}
fn stream_formats(t: &TrackEntry, remux_bitrate: f64) -> Vec<StreamFormatInfo> {
let mut formats = Vec::new();
formats.push(StreamFormatInfo {
codec: t.codec_id.to_string(),
remux: true,
bitrate: remux_bitrate,
containers: containers_by_codec(&t.codec_id),
bit_depth: t.audio.as_ref().and_then(|a| a.bit_depth.map(|e| e as u8)),
samplerate: t.audio.as_ref().map(|a| a.sampling_frequency),
channels: t.audio.as_ref().map(|a| a.channels as usize),
width: t.video.as_ref().map(|v| v.pixel_width),
height: t.video.as_ref().map(|v| v.pixel_height),
});
match t.track_type {
1 => {
let sw = t.video.as_ref().unwrap().pixel_width;
let sh = t.video.as_ref().unwrap().pixel_height;
for (w, br) in [
(3840, 6000e3),
(1920, 5000e3),
(1920, 2000e3),
(1280, 1500e3),
(640, 800e3),
(320, 200e3),
] {
if w > sw {
continue;
}
// most codecs use chroma subsampling that requires even dims
let h = ((w * sh) / sw) & !1; // clear last bit to ensure even height.
for (cid, enable) in [
("V_AV1", CONF.encoders.av1.is_some()),
("V_VP8", CONF.encoders.vp8.is_some()),
("V_VP9", CONF.encoders.vp9.is_some()),
("V_MPEG4/ISO/AVC", CONF.encoders.avc.is_some()),
("V_MPEGH/ISO/HEVC", CONF.encoders.hevc.is_some()),
] {
if enable {
formats.push(StreamFormatInfo {
codec: cid.to_string(),
bitrate: remux_bitrate.max(br),
remux: false,
containers: containers_by_codec(cid),
width: Some(w),
height: Some(h),
samplerate: None,
channels: None,
bit_depth: None,
});
}
}
}
}
2 => {
for br in [256e3, 128e3, 64e3] {
formats.push(StreamFormatInfo {
codec: "A_OPUS".to_string(),
bitrate: br,
remux: false,
containers: containers_by_codec("A_OPUS"),
width: None,
height: None,
samplerate: Some(48e3),
channels: Some(2),
bit_depth: Some(32),
});
}
}
17 => {}
_ => {}
}
formats
}
fn containers_by_codec(codec: &str) -> Vec<StreamContainer> {
use StreamContainer::*;
match codec {
"V_VP8" | "V_VP9" | "V_AV1" | "A_OPUS" | "A_VORBIS" => vec![Matroska, WebM],
"V_MPEG4/ISO/AVC" | "A_AAC" => vec![Matroska, MPEG4],
"S_TEXT/UTF8" | "S_TEXT/WEBVTT" => vec![Matroska, WebVTT, WebM, JVTT],
_ => vec![Matroska],
}
}
pub(crate) async fn write_stream_info(info: Arc<SMediaInfo>, mut b: DuplexStream) -> Result<()> {
let (_, info) = stream_info(info).await?;
spawn(async move { b.write_all(&serde_json::to_vec(&info)?).await });
Ok(())
}
fn media_duration(m: &MatroskaMetadata) -> f64 {
let info = m.info.as_ref().unwrap();
(info.duration.unwrap_or_default() * info.timestamp_scale as f64) / 1_000_000_000.
}
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