1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
|
import { OVar } from "../jshelper/mod.ts";
import { EncodingProfile, JhlsMetadata } from "./jhls.d.ts";
export interface EncodingProfileExt extends EncodingProfile { id: number, order: number }
export class ProfileSelector {
profiles_video: EncodingProfileExt[] = []
profiles_audio: EncodingProfileExt[] = []
profiles_subtitles: EncodingProfileExt[] = []
remux_bandwidth = new Map<number, { size: number, duration: number }>()
constructor(private bandwidth: OVar<number>, private metadata: JhlsMetadata) {
for (let id = 0; id < metadata.extra_profiles.length; id++) {
const p = metadata.extra_profiles[id];
if (p.audio) this.profiles_audio.push({ id, order: 0, ...p })
if (p.video) this.profiles_video.push({ id, order: 0, ...p })
if (p.subtitles) this.profiles_subtitles.push({ id, order: 0, ...p })
}
this.profiles_audio.sort((a, b) => profile_bw(b) - profile_bw(a))
this.profiles_video.sort((a, b) => profile_bw(b) - profile_bw(a))
this.profiles_subtitles.sort((a, b) => profile_bw(b) - profile_bw(a))
for (let i = 0; i < this.profiles_audio.length; i++) this.profiles_audio[i].order = i
for (let i = 0; i < this.profiles_video.length; i++) this.profiles_video[i].order = i
for (let i = 0; i < this.profiles_subtitles.length; i++) this.profiles_subtitles[i].order = i
}
profile_list_for_track(track: number): EncodingProfileExt[] {
const i = this.metadata.tracks[track].info.kind
if (i.audio) return this.profiles_audio
if (i.video) return this.profiles_video
if (i.subtitles) return this.profiles_subtitles
return []
}
select_optimal_profile(track: number, profile: OVar<EncodingProfileExt | undefined>) {
if (this.bandwidth.value < 5000 * 1000) {
profile.value = this.profile_list_for_track(track)[0]
} else {
profile.value = undefined
}
}
}
function profile_bw(p: EncodingProfile): number {
if (p.audio) return p.audio.bitrate / 8
if (p.video) return p.video.bitrate / 8
if (p.subtitles) return 100
return 0
}
|
