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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>
*/
/// <reference lib="dom" />
import { OVar, e } from "../jshelper/mod.ts";
import { SegmentDownloader } from "./download.ts";
import { PlayerTrack } from "./track/mod.ts";
import { Logger } from "../jshelper/src/log.ts";
import { create_track } from "./track/create.ts";
import { StreamInfo, TimeRange, TrackInfo } from "./types_stream.ts";
export interface BufferRange extends TimeRange { status: "buffered" | "loading" | "queued" }
export class Player {
public video = e("video")
public media_source = new MediaSource();
public streaminfo?: StreamInfo;
public tracks?: TrackInfo[];
public active_tracks = new OVar<PlayerTrack[]>([]);
public downloader: SegmentDownloader = new SegmentDownloader();
public position = new OVar(0)
public duration = new OVar(1)
public volume = new OVar(0)
public playing = new OVar(false)
public canplay = new OVar(false)
public error = new OVar<string | undefined>(undefined)
private cancel_buffering_pers: undefined | (() => void)
set_pers(s?: string) {
if (this.cancel_buffering_pers) this.cancel_buffering_pers(), this.cancel_buffering_pers = undefined
if (s) this.cancel_buffering_pers = this.logger?.log_persistent(s)
}
constructor(public base_url: string, poster: string, private start_time: number, public logger?: Logger<string>) {
this.video.poster = poster
this.volume.value = this.video.volume
let skip_change = false;
this.volume.onchange(v => {
if (v > 1.) return this.volume.value = 1;
if (v < 0.) return this.volume.value = 0;
if (!skip_change) this.video.volume = v
skip_change = false
})
this.video.onvolumechange = () => {
skip_change = true;
this.volume.value = this.video.volume
}
this.video.onloadedmetadata = () => { }
this.video.ondurationchange = () => { }
this.video.ontimeupdate = () => {
this.position.value = this.video.currentTime
this.update() // TODO maybe not here
}
this.video.onplay = () => {
console.log("play");
this.set_pers("Resuming playback...")
}
this.video.onwaiting = () => {
console.log("waiting");
if (this.video.currentTime > this.duration.value - 0.2) return this.set_pers("Playback finished")
this.set_pers("Buffering...")
this.canplay.value = false;
}
this.video.onplaying = () => {
console.log("playing");
this.playing.value = true;
this.set_pers()
}
this.video.onpause = () => {
console.log("pause");
this.playing.value = false
}
this.video.oncanplay = () => {
console.log("canplay");
this.set_pers()
this.canplay.value = true
}
this.video.onseeking = () => {
console.log("seeking");
this.set_pers("Seeking...")
}
this.video.onseeked = () => {
console.log("seeked");
this.set_pers()
}
this.video.onerror = e => {
console.error("video element error:", e);
this.set_pers("MSE crash -_-");
}
this.video.onabort = e => {
console.error("video element abort:", e);
this.set_pers("Aborted");
}
this.fetch_meta()
}
async fetch_meta() {
this.set_pers("Loading stream metadata...")
const res = await fetch(`${this.base_url}?info`, { headers: { "Accept": "application/json" } })
if (!res.ok) return this.error.value = "Cannot download stream info."
let streaminfo!: StreamInfo & { error: string }
try { streaminfo = await res.json() }
catch (_) { this.set_pers("Error: Node data invalid") }
if (streaminfo.error) return this.set_pers("server error: " + streaminfo.error)
this.set_pers()
//! bad code: assignment order is important because chapter callbacks use duration
this.duration.value = streaminfo.segments[0].duration
this.streaminfo = streaminfo
this.tracks = streaminfo!.segments[0].tracks;
console.log("aaa", this.tracks);
this.video.src = URL.createObjectURL(this.media_source)
this.media_source.addEventListener("sourceopen", async () => {
let video = false, audio = false, subtitle = false;
for (let i = 0; i < this.tracks!.length; i++) {
const t = this.tracks![i];
if (t.kind == "video" && !video)
video = true, await this.set_track_enabled(i, true, false)
if (t.kind == "audio" && !audio)
audio = true, await this.set_track_enabled(i, true, false)
if (t.kind == "subtitle" && !subtitle)
subtitle = true, await this.set_track_enabled(i, true, false)
}
this.set_pers("Buffering initial stream fragments...")
this.update(this.start_time)
this.video.currentTime = this.start_time
await this.canplay.wait_for(true)
this.set_pers()
})
}
async update(newt?: number) {
await Promise.all(this.active_tracks.value.map(t => t.update(newt ?? this.video.currentTime)))
}
async set_track_enabled(index: number, state: boolean, update = true) {
console.log(`(${index}) set enabled ${state}`);
const active_index = this.active_tracks.value.findIndex(t => t.track_index == index)
if (!state && active_index != -1) {
this.logger?.log(`Disabled track ${index}: ${display_track(this.tracks![index])}`)
const [track] = this.active_tracks.value.splice(active_index, 1)
track.abort.abort()
} else if (state && active_index == -1) {
this.logger?.log(`Enabled track ${index}: ${display_track(this.tracks![index])}`)
this.active_tracks.value.push(create_track(this, this.base_url, 0, index, this.tracks![index])!)
if (update) await this.update()
}
this.active_tracks.change()
}
play() { this.video.play() }
pause() { this.video.pause() }
frame_forward() {
//@ts-ignore trust me bro
this.video["seekToNextFrame"]()
}
async seek(p: number) {
this.set_pers("Buffering at target...")
await this.update(p)
this.video.currentTime = p
}
}
function display_track(t: TrackInfo): string {
return `${t.name}`
}
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