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package server.cache;
import haxe.io.Path;
import js.node.child_process.ChildProcess as ChildProcessObject;
import sys.FileSystem;
import utils.YoutubeUtils;
import ytdlp_nodejs.VideoFormat;
import ytdlp_nodejs.VideoInfo;
class YoutubeCache {
final main:Main;
final cache:Cache;
final ytdlp:YtdlpCache;
public function new(main:Main, cache:Cache, ytdlp:YtdlpCache):Void {
this.main = main;
this.cache = cache;
this.ytdlp = ytdlp;
}
public function cacheYoutubeVideo(client:Client, url:String, cb:CacheCallbacks) {
if (!cache.isYtReady) {
trace("Do `npm i https://github.com/RblSb/ytdlp-nodejs` to use cache feature (you also need to install `ffmpeg` to build mp4 from downloaded audio/video tracks).");
return;
}
final clientName = client.name;
final videoId = YoutubeUtils.extractVideoId(url);
if (videoId == "") {
log(clientName, 'Error: youtube video id not found in url: $url');
return;
}
// to prevent playlist in url handlings
url = 'https://youtu.be/$videoId';
final outName = videoId + ".mp4";
if (cache.exists(outName)) {
cb.onResolved(cache.getFileUrl(outName));
cb.onComplete();
return;
}
final inVideoName = '__tmp-video-$videoId';
inline function removeInputFiles():Void {
ytdlp.cleanInputFiles(inVideoName);
}
inline function checkEnoughSpace(contentLength:Int):Bool {
final hasSpace = cache.removeOlderCache(contentLength + cache.freeSpaceBlock);
if (!hasSpace) {
removeInputFiles();
cb.onError();
log(clientName, cache.notEnoughSpaceErrorText);
}
return hasSpace;
}
if (cache.isFileExists(inVideoName)) {
log(clientName, 'Caching $outName already in progress');
return;
}
trace('Caching $url to $outName...');
cb.onResolved(cache.getFileUrl(outName));
var useCookies = false;
var lastSentRatio = 0.0;
var canceled = false;
var process:Null<ChildProcessObject> = null;
if (cb.registerCancel != null) cb.registerCancel(() -> {
canceled = true;
process?.kill();
removeInputFiles();
});
function onGetInfo(info:VideoInfo):Void {
if (canceled) return;
if (cb.onMetadata != null) cb.onMetadata(info.title, info.duration);
trace('Get info with ${info.formats.length} formats');
var aformats = info.formats.filter(f -> f.acodec != "none"
&& f.vcodec == "none" && f.format_note?.contains("original"));
if (aformats.length == 0) {
aformats = info.formats.filter(f -> f.acodec != "none" && f.vcodec == "none");
}
if (aformats.length == 0) {
aformats = info.formats.filter(f -> f.acodec != "none");
}
aformats.sort((a, b) -> (a?.filesize ?? 0) < (b?.filesize ?? 0) ? 1 : -1);
final audioFormat:VideoFormat = aformats[0] ?? {
log(clientName, "Error: format with audio not found");
for (format in aformats) trace(format);
return;
}
final vformats = info.formats.filter(f -> {
if (f.vcodec == "none") return false;
return f.width != null && f.height != null;
});
vformats.sort((a, b) -> (a?.filesize ?? 0) < (b?.filesize ?? 0) ? 1 : -1);
var videoFormat = getBestYoutubeVideoFormat(vformats) ?? {
log(clientName, "Error: video format not found");
for (format in vformats) trace(format);
return;
}
inline function getTotalFormatsSize():Int {
final videoSize:Int = cast(videoFormat.filesize ?? 0);
final audioSize:Int = cast(audioFormat.filesize ?? 0);
return videoSize + audioSize;
}
// check if we have space for formats and video build
final ignoreQualities:Array<Int> = [];
for (i in 0...3) {
final hasSpace = cache.removeOlderCache(getTotalFormatsSize() * 2
+ cache.freeSpaceBlock);
if (hasSpace) break;
// try fallback to worse video quality
ignoreQualities.push(videoFormatResolution(videoFormat));
videoFormat = getBestYoutubeVideoFormat(vformats, ignoreQualities) ?? break;
}
if (!checkEnoughSpace(getTotalFormatsSize() * 2)) return;
final isMuxed = videoFormat.format_id == audioFormat.format_id;
final formatIds = if (isMuxed) {
videoFormat.format_id;
} else {
'${videoFormat.format_id}+${audioFormat.format_id}';
}
final totalSize = getTotalFormatsSize().limitMin(10);
var videoSizeRatio = (videoFormat.filesize ?? 0).limitMin(8) / totalSize;
var audioSizeRatio = (audioFormat.filesize ?? 0).limitMin(2) / totalSize;
if (isMuxed) {
videoSizeRatio = 1;
audioSizeRatio = 0;
}
trace(formatIds, toMibString(totalSize), videoSizeRatio.toFixed(), audioSizeRatio.toFixed());
var videoRatioCache = 0.0;
var audioRatioCache = 0.0;
process = ytdlp.download(url, {
format: formatIds,
output: '${cache.cacheDir}/$inVideoName',
remuxVideo: "mp4",
additionalOptions: ytdlp.ytExtraOptions(),
cookies: useCookies ? ytdlp.getCookiesPathOrNull() : null,
forceIpv4: true,
socketTimeout: 2,
extractorRetries: 0,
}, {
onProgress: p -> {
final isFinished = p.status == "finished";
if (isFinished) {
final filename = Path.withoutDirectory(p.filename);
trace('$filename format file downloaded');
}
var ratio = if (isFinished) {
1;
} else {
(p.downloaded / p.total).clamp(0, 1);
}
final isVideo = p.filename.contains('f${videoFormat.format_id}');
if (isVideo) videoRatioCache = ratio;
else audioRatioCache = ratio;
ratio = videoRatioCache * videoSizeRatio + audioRatioCache * audioSizeRatio;
if (canceled) return;
if (ratio - lastSentRatio < 0.01 && ratio < 1) return;
lastSentRatio = ratio;
cb.onProgress(ratio.toFixed(4));
},
onComplete: () -> {
if (canceled) {
removeInputFiles();
return;
}
final name = cache.findFile(n -> n.startsWith(inVideoName)) ?? {
final err = 'Error: cannot find downloaded file with prefix $inVideoName';
cache.logWithAdmins(client, err);
cb.onError();
return;
};
FileSystem.rename('${cache.cacheDir}/$name', '${cache.cacheDir}/$outName');
removeInputFiles();
cache.add(outName);
cb.onComplete();
},
onError: err -> {
if (canceled) return;
final err = "Error during video download: " + err;
cache.logWithAdmins(client, err);
removeInputFiles();
cb.onError();
}
});
}
ytdlp.getInfoAsync(url, useCookies).then(onGetInfo).catchError(err -> {
trace(err);
useCookies = true;
ytdlp.getInfoAsync(url, useCookies).then(onGetInfo).catchError(err -> {
removeInputFiles();
cb.onError();
log(clientName, "" + err);
});
});
}
function getBestYoutubeVideoFormat(formats:Array<VideoFormat>, ?ignoreQualities:Array<Int>):Null<VideoFormat> {
final qPriority = [1080, 720, 480, 360, 240, 144];
if (ignoreQualities != null) {
for (q in ignoreQualities) qPriority.remove(q);
}
final format60 = findVideoFormat(formats, qPriority, true);
return format60 ?? findVideoFormat(formats, qPriority, false);
}
function findVideoFormat(formats:Array<VideoFormat>, qPriority:Array<Int>, is60fps:Bool):Null<VideoFormat> {
for (q in qPriority) {
final quality = '${q}p' + (is60fps ? "60" : "");
for (format in formats) {
final min = videoFormatResolution(format);
if (min > q) continue;
final format_note = formatVideoQuality(format);
if (format_note == quality) return format;
}
}
return null;
}
function videoFormatResolution(format:VideoFormat):Int {
final min = Math.min(format.width, format.height);
return Std.int(min);
}
function formatVideoQuality(format:VideoFormat):Null<String> {
final resolution = videoFormatResolution(format);
// when there is 720p and 720p60 formats
return format.format_note ?? '${resolution}p';
}
inline function toMibString(bytes:Int):String {
return '${(bytes / 1024 / 1024).toFixed()} MiB';
}
function log(clientName:String, msg:String):Void {
cache.logByName(clientName, msg);
}
}
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