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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) 2026 metamuffin <metamuffin.org>
*/
use crate::{
USER_AGENT,
plugins::{ImportPlugin, PluginContext, PluginInfo},
source_rank::ObjectImportSourceExt,
};
use anyhow::{Context, Result};
use jellycache::{Cache, HashKey};
use jellycommon::*;
use jellydb::RowNum;
use jellyremuxer::matroska::Segment;
use log::info;
use reqwest::{
Client, ClientBuilder,
header::{HeaderMap, HeaderName, HeaderValue},
};
use serde::{Deserialize, Serialize};
use std::{
io::Read,
path::Path,
process::{Command, Stdio},
sync::Arc,
time::Duration,
};
use tokio::{
runtime::Handle,
sync::Semaphore,
time::{Instant, sleep_until},
};
pub(crate) struct AcoustID {
client: Client,
key: String,
rate_limit: Arc<Semaphore>,
}
#[derive(Debug, Hash, Clone, Serialize, Deserialize)]
pub(crate) struct Fingerprint {
duration: u32,
fingerprint: String,
}
#[derive(Debug, Serialize, Deserialize)]
pub(crate) struct FpCalcOutput {
duration: f32,
fingerprint: String,
}
#[derive(Serialize, Deserialize)]
pub(crate) struct AcoustIDLookupResultRecording {
id: String,
}
#[derive(Serialize, Deserialize)]
pub(crate) struct AcoustIDLookupResult {
id: String,
score: f32,
#[serde(default)]
recordings: Vec<AcoustIDLookupResultRecording>,
}
#[derive(Serialize, Deserialize)]
pub(crate) struct AcoustIDLookupResponse {
status: String,
results: Vec<AcoustIDLookupResult>,
}
impl AcoustID {
pub fn new(api_key: &str) -> Self {
let client = ClientBuilder::new()
.default_headers(HeaderMap::from_iter([
(
HeaderName::from_static("accept"),
HeaderValue::from_static("application/json"),
),
(
HeaderName::from_static("user-agent"),
HeaderValue::from_static(USER_AGENT),
),
]))
.build()
.unwrap();
Self {
client,
// send at most 3 req/s according to acoustid docs, each lock is therefore held for 1s
// this implementation also never sends more than 3 requests in-flight.
rate_limit: Arc::new(Semaphore::new(3)),
key: api_key.to_owned(),
}
}
pub fn get_atid_mbid(
&self,
cache: &Cache,
fp: &Fingerprint,
rt: &Handle,
) -> Result<Option<(String, String)>> {
let res = self.lookup(cache, fp.to_owned(), rt)?;
for r in &res.results {
if let Some(k) = r.recordings.first() {
return Ok(Some((r.id.clone(), k.id.clone())));
}
}
Ok(None)
}
pub fn lookup(
&self,
cache: &Cache,
fp: Fingerprint,
rt: &Handle,
) -> Result<Arc<AcoustIDLookupResponse>> {
cache.cache_memory(&format!("ext/acoustid/{}.json", HashKey(&fp)) , move || rt.block_on(async {
let _permit = self.rate_limit.clone().acquire_owned().await?;
let permit_drop_ts = Instant::now() + Duration::SECOND;
info!("acoustid lookup");
let duration = fp.duration;
let fingerprint = fp.fingerprint.replace("=", "%3D");
let client = &self.key;
let body = format!("format=json&meta=recordingids&client={client}&duration={duration}&fingerprint={fingerprint}");
let resp = self
.client
.post("https://api.acoustid.org/v2/lookup".to_string())
.header("Content-Type", "application/x-www-form-urlencoded")
.body(body)
.send()
.await?.error_for_status()?.json::<AcoustIDLookupResponse>().await?;
tokio::task::spawn(async move {
sleep_until(permit_drop_ts).await;
drop(_permit);
});
Ok(resp)
}))
.context("acoustid lookup")
}
}
pub(crate) fn acoustid_fingerprint(cache: &Cache, path: &Path) -> Result<Arc<Fingerprint>> {
cache.cache_memory(
&format!("media/chromaprint/{}.json", HashKey(path)),
move || {
info!("fpcalc {path:?}");
let child = Command::new("fpcalc")
.arg("-json")
.arg(path)
.stdout(Stdio::piped())
.spawn()
.context("fpcalc")?;
let mut buf = Vec::new();
child
.stdout
.unwrap()
.read_to_end(&mut buf)
.context("read fpcalc output")?;
let out: FpCalcOutput =
serde_json::from_slice(&buf).context("parsing fpcalc output")?;
let out = Fingerprint {
duration: out.duration as u32,
fingerprint: out.fingerprint,
};
Ok(out)
},
)
}
impl ImportPlugin for AcoustID {
fn info(&self) -> PluginInfo {
PluginInfo {
name: "acoustid",
tag: MSOURCE_ACOUSTID,
handle_media: true,
..Default::default()
}
}
fn media(&self, ct: &PluginContext, node: RowNum, path: &Path, seg: &Segment) -> Result<()> {
if !ct.iflags.use_acoustid {
return Ok(());
}
let duration = (seg.info.duration.unwrap_or_default() * seg.info.timestamp_scale as f64)
/ 1_000_000_000.;
if duration > 600. || duration < 10. {
return Ok(());
}
let fp = acoustid_fingerprint(&ct.ic.cache, path)?;
let Some((atid, mbid)) = self.get_atid_mbid(&ct.ic.cache, &fp, &ct.rt)? else {
return Ok(());
};
ct.ic.update_node(node, |node| {
node.as_object().update(NO_IDENTIFIERS, |ids| {
ids.insert_s(ct.is, IDENT_ACOUST_ID_TRACK, &atid)
.as_object()
.insert_s(ct.is, IDENT_MUSICBRAINZ_RECORDING, &mbid)
})
})?;
Ok(())
}
}
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