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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};
use std::{path::PathBuf, sync::Arc};
use tokio::{
io::{AsyncWriteExt, DuplexStream},
spawn,
task::spawn_blocking,
};
use crate::SMediaInfo;
async fn async_matroska_metadata(path: PathBuf) -> Result<Arc<MatroskaMetadata>> {
Ok(spawn_blocking(move || matroska_metadata(&path)).await??)
}
pub(crate) struct InternalStreamInfo {
pub paths: Vec<PathBuf>,
pub metadata: Vec<Arc<MatroskaMetadata>>,
pub track_to_file: Vec<(usize, u64)>,
}
pub(crate) async fn stream_info(info: Arc<SMediaInfo>) -> Result<(InternalStreamInfo, StreamInfo)> {
let mut metadata = Vec::new();
let mut paths = Vec::new();
for path in &info.files {
metadata.push(async_matroska_metadata(path.clone()).await?);
paths.push(path.clone());
}
let mut tracks = Vec::new();
let mut track_to_file = Vec::new();
for (i, m) in metadata.iter().enumerate() {
if let Some(t) = &m.tracks {
for t in &t.entries {
tracks.push(StreamTrackInfo {
name: None,
kind: match t.track_type {
1 => TrackKind::Video,
2 => TrackKind::Audio,
17 => TrackKind::Subtitle,
_ => todo!(),
},
formats: stream_formats(t),
});
track_to_file.push((i, t.track_number));
}
}
}
let segment = StreamSegmentInfo {
name: None,
duration: metadata[0]
.info
.as_ref()
.unwrap()
.duration
.unwrap_or_default(),
tracks,
};
Ok((
InternalStreamInfo {
metadata,
paths,
track_to_file,
},
StreamInfo {
name: info.info.title.clone(),
segments: vec![segment],
},
))
}
fn stream_formats(t: &TrackEntry) -> Vec<StreamFormatInfo> {
let mut formats = Vec::new();
formats.push(StreamFormatInfo {
codec: t.codec_id.to_string(),
remux: true,
bitrate: 2_000_000., // TODO
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),
..Default::default()
});
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, 8e6), (1920, 5e6), (1280, 3e6), (640, 1e6)] {
if w > sw {
continue;
}
let h = (w * sh) / sw;
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_AVC", CONF.encoders.avc.is_some()),
("V_HEVC", CONF.encoders.hevc.is_some()),
] {
if enable {
formats.push(StreamFormatInfo {
codec: cid.to_string(),
bitrate: 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_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(())
}
|
