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import { OVar, e } from "../jshelper/mod.ts";
export interface JhlsMetadata {
tracks: JhlsTrack[],
duration: number,
}
export interface JhlsTrack {
info: SourceTrack,
segments: { start: number, end: number }[],
}
export interface SourceTrack {
kind: SourceTrackKind,
name: string,
codec: string,
language: string,
}
export interface SourceTrackKind {
video?: {
width: number,
height: number,
fps: number,
},
audio?: {
channels: number,
sample_rate: number,
bit_depth: number,
},
subtitles?: boolean,
}
document.addEventListener("DOMContentLoaded", () => {
if (document.body.classList.contains("player")) {
if (!globalThis.MediaSource) return alert("Media Source Extension API required")
const node_id = globalThis.location.pathname.split("/")[2];
const main = document.getElementById("main")!;
document.getElementsByTagName("footer")[0].remove()
initialize_player(main, node_id)
}
})
function initialize_player(el: HTMLElement, node_id: string) {
el.innerHTML = "" // clear the body
const player = new Player(node_id)
const toggle_playing = () => player.playing.value ? player.pause() : player.play()
let pri_current: HTMLElement;
let pri: HTMLElement;
const controls = e("div", { class: "jsp-controls" },
player.playing.map(playing => e("button", playing ? "||" : "|>", { onclick() { } })),
e("p", { class: "jsp-status" },
player.position.map(v => e("span", display_time(v))), e("br"),
player.position.map(v => e("span", display_time(v - player.duration.value)))
),
pri = e("div", { class: "jsp-pri" }, pri_current = e("div", { class: "jsp-pri-current" })),
e("button", "X", {
onclick() {
if (document.fullscreenElement) document.exitFullscreen()
else document.documentElement.requestFullscreen()
}
})
)
player.position.onchangeinit(p => pri_current.style.width = (p / player.duration.value * 100) + "%")
const pel = e("div", { class: "jsp" },
player.video,
player.buffering_status.map(b => e("div", { class: "jsp-overlay" },
b ? e("p", { class: "jsp-buffering" }, b) : undefined
)),
controls,
)
el.append(pel)
mouse_idle(pel, 1000, idle => {
controls.style.opacity = idle ? "0" : "1"
pel.style.cursor = idle ? "none" : "default"
})
player.video.addEventListener("click", toggle_playing)
pri.addEventListener("mousedown", ev => {
const r = pri.getBoundingClientRect()
const p = (ev.clientX - r.left) / (r.right - r.left)
player.seek(p * player.duration.value)
})
document.body.addEventListener("keydown", k => {
// if (k.code == "Period") vel["seekToNextFrame" as "play"]()
if (k.code == "Space") toggle_playing()
else if (k.code == "ArrowLeft") player.seek(player.position.value - 5)
else if (k.code == "ArrowRight") player.seek(player.position.value + 5)
else if (k.code == "ArrowUp") player.seek(player.position.value - 60)
else if (k.code == "ArrowDown") player.seek(player.position.value + 60)
else return;
k.preventDefault()
})
}
function mouse_idle(e: HTMLElement, timeout: number, cb: (b: boolean) => unknown) {
let ct: number;
let idle = false
e.onmouseleave = () => { clearTimeout(ct) }
e.onmousemove = () => {
clearTimeout(ct)
if (idle) {
idle = false
cb(idle)
}
ct = setTimeout(() => {
idle = true
cb(idle)
}, timeout)
}
}
function display_time(t: number): string {
if (t < 0) return "-" + display_time(-t)
let h = 0, m = 0, s = 0;
while (t > 3600) t -= 3600, h++;
while (t > 60) t -= 60, m++;
while (t > 1) t -= 1, s++;
return (h ? h + "h" : "") + (m ? m + "m" : "") + (s ? s + "s" : "")
}
class Player {
public video = e("video")
private media_source = new MediaSource();
public position = new OVar(0)
public duration = new OVar(1)
public playing = new OVar(false)
public buffering_status = new OVar<string | undefined>(undefined)
public error = new OVar<string | undefined>(undefined)
constructor(private node_id: string) {
this.video.onloadedmetadata = () => { }
this.video.ondurationchange = () => { }
this.video.ontimeupdate = () => this.position.value = this.video.currentTime
this.video.onplay = () => {
this.buffering_status.value = undefined;
}
this.video.onwaiting = () => {
this.buffering_status.value = "Buffering...";
}
this.video.onplaying = () => {
this.playing.value = true;
}
this.video.onpause = () => {
this.playing.value = false
}
this.fetch_meta()
}
async fetch_meta() {
this.buffering_status.value = "Loading JHLS metadata..."
const res = await fetch(`/n/${encodeURIComponent(this.node_id)}/stream?format=jhls`)
if (!res.ok) return this.error.value = "Cannot download JHLS metadata"
const metadata = await res.json() as JhlsMetadata
this.buffering_status.value = "Fetching initial segments..."
this.duration.value = metadata.duration
this.video.src = URL.createObjectURL(this.media_source)
this.media_source.addEventListener("sourceopen", () => {
console.log("sourceopen");
this.segment(metadata)
})
}
async segment(metadata: JhlsMetadata) {
const srcbuf = this.media_source.addSourceBuffer("video/webm")
srcbuf.mode = "segments"
srcbuf.addEventListener("updatestart", () => {
console.log("updatestart");
})
srcbuf.addEventListener("updateend", () => {
console.log("updateend");
})
srcbuf.addEventListener("update", () => {
console.log("update");
})
srcbuf.addEventListener("error", () => {
console.log("error");
})
let i = 0;
for (const seg of metadata.tracks[0].segments) {
if (i++ > 5) break
const res = await fetch(`/n/${encodeURIComponent(this.node_id)}/stream?format=hlsseg&index=${i}&tracks=0`)
if (!res.ok) return this.error.value = "Cannot download media segment."
const segbuf = await res.arrayBuffer()
console.log("aaa");
srcbuf.timestampOffset = seg.start
srcbuf.appendBuffer(segbuf)
}
}
play() {
console.log("play");
this.video.play()
}
pause() {
console.log("pause");
this.video.pause()
}
seek(_p: number) { }
}
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