Bilibili-Evolved/registry/lib/plugins/video/download/wasm-output/handler.ts
2024-04-26 18:02:38 +08:00

118 lines
3.2 KiB
TypeScript

import { DownloadPackage } from '@/core/download'
import { meta } from '@/core/meta'
import { getComponentSettings } from '@/core/settings'
import { Toast } from '@/core/toast'
import { title as pluginTitle } from '.'
import type { Options } from '../../../../components/video/download'
import { DownloadVideoAction } from '../../../../components/video/download/types'
import { FFmpeg } from './ffmpeg'
import { getCacheOrGet, httpGet, toastProgress, toBlobUrl } from './utils'
const ffmpeg = new FFmpeg()
async function loadFFmpeg() {
const toast = Toast.info('正在加载 FFmpeg', `${pluginTitle} - 初始化`)
await ffmpeg.load({
workerLoadURL: toBlobUrl(
await getCacheOrGet(
'ffmpeg-worker',
meta.compilationInfo.altCdn.library.ffmpeg.worker,
toastProgress(toast, '正在加载 FFmpeg Worker'),
),
'text/javascript',
),
coreURL: toBlobUrl(
await getCacheOrGet(
'ffmpeg-core',
meta.compilationInfo.altCdn.library.ffmpeg.core,
toastProgress(toast, '正在加载 FFmpeg Core'),
),
'text/javascript',
),
wasmURL: toBlobUrl(
await getCacheOrGet(
'ffmpeg-wasm',
meta.compilationInfo.altCdn.library.ffmpeg.wasm,
toastProgress(toast, '正在加载 FFmpeg WASM'),
),
'application/wasm',
),
})
toast.message = '完成!'
toast.close()
}
async function single(
name: string,
videoUrl: string,
audioUrl: string,
isFlac: boolean,
pageIndex = 1,
totalPages = 1,
) {
const toast = Toast.info('', `${pluginTitle} - ${pageIndex} / ${totalPages}`)
ffmpeg.writeFile('video', await httpGet(videoUrl, toastProgress(toast, '正在下载视频流')))
ffmpeg.writeFile('audio', await httpGet(audioUrl, toastProgress(toast, '正在下载音频流')))
toast.message = '混流中……'
const outputExt = isFlac ? 'mkv' : 'mp4'
name = name.replace(/.[^/.]+$/, `.${outputExt}`)
await ffmpeg.exec([
'-i',
'video',
'-i',
'audio',
'-c:v',
'copy',
'-c:a',
'copy',
'-f',
isFlac ? 'matroska' : 'mp4',
`output.${outputExt}`,
])
const output = await ffmpeg.readFile(`output.${outputExt}`)
const outputBlob = new Blob([output], {
type: isFlac ? 'video/x-matroska' : 'video/mp4',
})
toast.message = '完成!'
toast.duration = 1000
await DownloadPackage.single(name, outputBlob)
}
export async function run(action: DownloadVideoAction) {
if (!ffmpeg.loaded) {
await loadFFmpeg()
}
const { dashAudioExtension, dashFlacAudioExtension, dashVideoExtension } =
getComponentSettings<Options>('downloadVideo').options
const pages = action.infos
for (let i = 0; i < pages.length; i++) {
const page = pages[i]
const [video, audio] = page.titledFragments
if (
!(
page.fragments.length === 2 &&
video.extension === dashVideoExtension &&
(audio.extension === dashAudioExtension || audio.extension === dashFlacAudioExtension)
)
) {
throw new Error('仅支持 DASH 格式视频和音频')
}
await single(
video.title,
video.url,
audio.url,
audio.extension === dashFlacAudioExtension,
i + 1,
pages.length,
)
}
}