feat: batch video upscaling with folder upload, directory save, and result comparison (#1051)

* feat: support batch video upscaling with folder upload and directory save

- Add multi-file selection and entire folder upload (webkitdirectory)
- Support drag & drop of both files and folders via FileSystemEntry API
- Add save directory picker using File System Access API (showDirectoryPicker)
- Process videos sequentially with per-file progress and status tracking
- Add right-side result list with click-to-compare functionality
- Add per-video duration and total batch duration display
- Add retry button for failed items with error detail display
- Remove auto-play on comparison viewer load
- Fix worker error handling: handle "error" command to reject stale promises
- Fix event listener accumulation in video comparison (AbortController)
- Fix XSS risk by escaping HTML in all innerHTML injections
- Fix URL revocation timing in download to prevent large file truncation
- Extract writeToSaveDirectory and truncateName helpers to reduce duplication
- Add Usage Guide panel explaining single/multiple/folder upload options

Files changed:
  docs/upscaler/index.html  (+1110/-181)
  docs/upscaler/upscaler.js (+110)

* fix: prevent auto-play and resource consumption during upscaling

- Set preload="metadata" on preview and comparison video elements
- Explicitly pause preview video after setting src in showVideoPreview
- Remove preview video seek sync from batch processing progress callbacks
  (was causing continuous decode during upscaling, wasting GPU resources)
- Remove preview video seek sync from retry progress callback
- All videos now require manual play; no background resource usage

* fix: improve upscaled video quality with higher bitrate and codec support

- Raise base bitrate from 2.5 Mbps (25e5) to 8 Mbps (8e6) for standard and
  firefox processors, preventing quality loss when source videos have high
  bitrates (e.g. 720p @ 16.7 Mbps was producing 1440p @ 10 Mbps, smaller
  than the original file)
- Double the bitrate for mediabunny processor (X.n1 * 2) to account for the
  4x pixel increase from 2x upscaling
- Add H.264 Level 5.1 (avc1.640033) and Level 5.2 (avc1.640034) codecs to
  the fallback lists, since Level 4.0 (avc1.640028, ~24.6 Mbps) cannot
  support the higher bitrates for 1440p+ outputs
- Add latencyMode: "quality" to VideoEncoder configs for both standard and
  firefox processors, prioritizing encoding quality over latency (suitable
  for offline processing)

* feat: add video data comparison panel for original vs upscaled metrics

- Add a comparison data table below the file info bar showing 6 metrics:
  Resolution, File Size, Duration, Est. Bitrate, Pixels, Process Time
- Display per-metric change percentage with color-coded indicators:
  green (↑) for improvements, red (↓) for regressions, gray for neutral
- Estimated bitrate calculated from file size × 8 / video duration
- Table renders after both original and upscaled video metadata loads
- Auto-hide panel on reset

* fix: make video data comparison panel full-width and responsive

- Move comparison data table from inside the left column to the full-width
  area below the left/right layout, so it is no longer constrained by the
  comparison viewer column width
- Remove table-fixed colgroup and overflow-x-auto that caused horizontal
  scrolling on smaller screens
- Table now uses w-full auto-layout, displaying all 4 columns (Metric,
  Original, Upscaled, Change) without requiring horizontal scrolling

---------

Co-authored-by: rionzhao <rionzhao@tencent.com>
This commit is contained in:
糖猫猫andrionzhao authored and GitHub committed 2026-09-10 17:19:38 +08:00
commit 0896841d23
538 files changed
+379715

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/*!
* artplayer-plugin-multiple-subtitles.js v1.2.0
* Github: https://github.com/zhw2590582/ArtPlayer
* (c) 2017-2026 Harvey Zhao
* Released under the MIT License.
*/
var defaultCueSettings = {
direction: "horizontal",
snapToLines: true,
linePosition: "auto",
lineAlign: "start",
textPosition: "auto",
positionAlign: "auto",
size: 100,
alignment: "center"
};
var WebVTTParser = function(entities) {
if (!entities) {
entities = {
"&amp": "&",
"&lt": "<",
"&gt": ">",
"&lrm": "‎",
"&rlm": "‏",
"&nbsp": " "
};
}
this.entities = entities;
this.parse = function(input, mode) {
input = input.replace(/\0/g, "�");
var NEWLINE = /\r\n|\r|\n/, startTime = Date.now(), linePos = 0, lines = input.split(NEWLINE), alreadyCollected = false, styles = [], cues = [], errors = [];
function err(message, col) {
errors.push({ message, line: linePos + 1, col });
}
var line = lines[linePos], lineLength = line.length, signature = "WEBVTT", bom = 0, signature_length = signature.length;
if (line[0] === "\uFEFF") {
bom = 1;
signature_length += 1;
}
if (lineLength < signature_length || line.indexOf(signature) !== 0 + bom || lineLength > signature_length && line[signature_length] !== " " && line[signature_length] !== " ") {
err('No valid signature. (File needs to start with "WEBVTT".)');
}
linePos++;
while (lines[linePos] != "" && lines[linePos] != void 0) {
err("No blank line after the signature.");
if (lines[linePos].indexOf("-->") != -1) {
alreadyCollected = true;
break;
}
linePos++;
}
while (lines[linePos] != void 0) {
var cue;
while (!alreadyCollected && lines[linePos] == "") {
linePos++;
}
if (!alreadyCollected && lines[linePos] == void 0) break;
cue = Object.assign({}, defaultCueSettings, {
id: "",
startTime: 0,
endTime: 0,
pauseOnExit: false,
direction: "horizontal",
snapToLines: true,
linePosition: "auto",
lineAlign: "start",
textPosition: "auto",
positionAlign: "auto",
size: 100,
alignment: "center",
text: "",
tree: null
});
var parseTimings = true;
if (lines[linePos].indexOf("-->") == -1) {
cue.id = lines[linePos];
if (/^NOTE($|[ \t])/.test(cue.id)) {
linePos++;
while (lines[linePos] != "" && lines[linePos] != void 0) {
if (lines[linePos].indexOf("-->") != -1) err("Cannot have timestamp in a comment.");
linePos++;
}
continue;
}
if (/^STYLE($|[ \t])/.test(cue.id)) {
var style = [];
var invalid = false;
linePos++;
while (lines[linePos] != "" && lines[linePos] != void 0) {
if (lines[linePos].indexOf("-->") != -1) {
err("Cannot have timestamp in a style block.");
invalid = true;
}
style.push(lines[linePos]);
linePos++;
}
if (cues.length) {
err("Style blocks cannot appear after the first cue.");
continue;
}
if (!invalid) {
styles.push(style.join("\n"));
}
continue;
}
linePos++;
if (lines[linePos] == "" || lines[linePos] == void 0) {
err("Cue identifier cannot be standalone.");
continue;
}
if (lines[linePos].indexOf("-->") == -1) {
parseTimings = false;
err("Cue identifier needs to be followed by timestamp.");
continue;
}
}
alreadyCollected = false;
var timings = new WebVTTCueTimingsAndSettingsParser(lines[linePos], err);
var previousCueStart = 0;
if (cues.length > 0) {
previousCueStart = cues[cues.length - 1].startTime;
}
if (parseTimings && !timings.parse(cue, previousCueStart)) {
cue = null;
linePos++;
while (lines[linePos] != "" && lines[linePos] != void 0) {
if (lines[linePos].indexOf("-->") != -1) {
alreadyCollected = true;
break;
}
linePos++;
}
continue;
}
linePos++;
while (lines[linePos] != "" && lines[linePos] != void 0) {
if (lines[linePos].indexOf("-->") != -1) {
err("Blank line missing before cue.");
alreadyCollected = true;
break;
}
if (cue.text != "") cue.text += "\n";
cue.text += lines[linePos];
linePos++;
}
var cuetextparser = new WebVTTCueTextParser(cue.text, err, mode, entities);
cue.tree = cuetextparser.parse(cue.startTime, cue.endTime);
cues.push(cue);
}
cues.sort(function(a, b) {
if (a.startTime < b.startTime) return -1;
if (a.startTime > b.startTime) return 1;
if (a.endTime > b.endTime) return -1;
if (a.endTime < b.endTime) return 1;
return 0;
});
return { cues, errors, time: Date.now() - startTime, styles };
};
};
var WebVTTCueTimingsAndSettingsParser = function(line, errorHandler) {
var SPACE = /[\u0020\t\f]/, NOSPACE = /[^\u0020\t\f]/, line = line, pos = 0, err = function(message) {
errorHandler(message, pos + 1);
};
function skip(pattern) {
while (line[pos] != void 0 && pattern.test(line[pos])) {
pos++;
}
}
function collect(pattern) {
var str = "";
while (line[pos] != void 0 && pattern.test(line[pos])) {
str += line[pos];
pos++;
}
return str;
}
function timestamp() {
var units = "minutes", val1, val2, val3, val4;
if (line[pos] == void 0) {
err("No timestamp found.");
return;
}
if (!/\d/.test(line[pos])) {
err("Timestamp must start with a character in the range 0-9.");
return;
}
val1 = collect(/\d/);
if (val1.length > 2 || parseInt(val1, 10) > 59) {
units = "hours";
}
if (line[pos] != ":") {
err("No time unit separator found.");
return;
}
pos++;
val2 = collect(/\d/);
if (val2.length != 2) {
err("Must be exactly two digits.");
return;
}
if (units == "hours" || line[pos] == ":") {
if (line[pos] != ":") {
err("No seconds found or minutes is greater than 59.");
return;
}
pos++;
val3 = collect(/\d/);
if (val3.length != 2) {
err("Must be exactly two digits.");
return;
}
} else {
if (val1.length != 2) {
err("Must be exactly two digits.");
return;
}
val3 = val2;
val2 = val1;
val1 = "0";
}
if (line[pos] != ".") {
err('No decimal separator (".") found.');
return;
}
pos++;
val4 = collect(/\d/);
if (val4.length != 3) {
err("Milliseconds must be given in three digits.");
return;
}
if (parseInt(val2, 10) > 59) {
err("You cannot have more than 59 minutes.");
return;
}
if (parseInt(val3, 10) > 59) {
err("You cannot have more than 59 seconds.");
return;
}
return parseInt(val1, 10) * 60 * 60 + parseInt(val2, 10) * 60 + parseInt(val3, 10) + parseInt(val4, 10) / 1e3;
}
function parseSettings(input, cue) {
var settings = input.split(SPACE), seen = [];
for (var i = 0; i < settings.length; i++) {
if (settings[i] == "") continue;
var index = settings[i].indexOf(":"), setting = settings[i].slice(0, index), value = settings[i].slice(index + 1);
if (seen.indexOf(setting) != -1) {
err("Duplicate setting.");
}
seen.push(setting);
if (value == "") {
err("No value for setting defined.");
return;
}
if (setting == "vertical") {
if (value != "rl" && value != "lr") {
err("Writing direction can only be set to 'rl' or 'rl'.");
continue;
}
cue.direction = value;
} else if (setting == "line") {
if (/,/.test(value)) {
var comp = value.split(",");
value = comp[0];
var lineAlign = comp[1];
}
if (!/^[-\d](\d*)(\.\d+)?%?$/.test(value)) {
err("Line position takes a number or percentage.");
continue;
}
if (value.indexOf("-", 1) != -1) {
err("Line position can only have '-' at the start.");
continue;
}
if (value.indexOf("%") != -1 && value.indexOf("%") != value.length - 1) {
err("Line position can only have '%' at the end.");
continue;
}
if (value[0] == "-" && value[value.length - 1] == "%") {
err("Line position cannot be a negative percentage.");
continue;
}
var numVal = value;
var isPercent = false;
if (value[value.length - 1] == "%") {
isPercent = true;
numVal = value.slice(0, value.length - 1);
if (parseInt(value, 10) > 100) {
err("Line position cannot be >100%.");
continue;
}
}
if (numVal === "" || isNaN(numVal) || !isFinite(numVal)) {
err("Line position needs to be a number");
continue;
}
if (lineAlign !== void 0) {
if (!["start", "center", "end"].includes(lineAlign)) {
err("Line alignment needs to be one of start, center or end");
continue;
}
cue.lineAlign = lineAlign;
}
cue.snapToLines = !isPercent;
cue.linePosition = parseFloat(numVal);
if (parseFloat(numVal).toString() !== numVal) {
cue.nonSerializable = true;
}
} else if (setting == "position") {
if (/,/.test(value)) {
var comp = value.split(",");
value = comp[0];
var positionAlign = comp[1];
}
if (value[value.length - 1] != "%") {
err("Text position must be a percentage.");
continue;
}
if (parseInt(value, 10) > 100 || parseInt(value, 10) < 0) {
err("Text position needs to be between 0 and 100%.");
continue;
}
numVal = value.slice(0, value.length - 1);
if (numVal === "" || isNaN(numVal) || !isFinite(numVal)) {
err("Line position needs to be a number");
continue;
}
if (positionAlign !== void 0) {
if (!["line-left", "center", "line-right"].includes(positionAlign)) {
err("Position alignment needs to be one of line-left, center or line-right");
continue;
}
cue.positionAlign = positionAlign;
}
cue.textPosition = parseFloat(numVal);
} else if (setting == "size") {
if (value[value.length - 1] != "%") {
err("Size must be a percentage.");
continue;
}
if (parseInt(value, 10) > 100) {
err("Size cannot be >100%.");
continue;
}
var size = value.slice(0, value.length - 1);
if (size === void 0 || size === "" || isNaN(size)) {
err("Size needs to be a number");
size = 100;
continue;
} else {
size = parseFloat(size);
if (size < 0 || size > 100) {
err("Size needs to be between 0 and 100%.");
continue;
}
}
cue.size = size;
} else if (setting == "align") {
var alignValues = ["start", "center", "end", "left", "right"];
if (alignValues.indexOf(value) == -1) {
err("Alignment can only be set to one of " + alignValues.join(", ") + ".");
continue;
}
cue.alignment = value;
} else {
err("Invalid setting.");
}
}
}
this.parse = function(cue, previousCueStart) {
skip(SPACE);
cue.startTime = timestamp();
if (cue.startTime == void 0) {
return;
}
if (cue.startTime < previousCueStart) {
err("Start timestamp is not greater than or equal to start timestamp of previous cue.");
}
if (NOSPACE.test(line[pos])) {
err("Timestamp not separated from '-->' by whitespace.");
}
skip(SPACE);
if (line[pos] != "-") {
err("No valid timestamp separator found.");
return;
}
pos++;
if (line[pos] != "-") {
err("No valid timestamp separator found.");
return;
}
pos++;
if (line[pos] != ">") {
err("No valid timestamp separator found.");
return;
}
pos++;
if (NOSPACE.test(line[pos])) {
err("'-->' not separated from timestamp by whitespace.");
}
skip(SPACE);
cue.endTime = timestamp();
if (cue.endTime == void 0) {
return;
}
if (cue.endTime <= cue.startTime) {
err("End timestamp is not greater than start timestamp.");
}
if (NOSPACE.test(line[pos])) ;
skip(SPACE);
parseSettings(line.substring(pos), cue);
return true;
};
this.parseTimestamp = function() {
var ts = timestamp();
if (line[pos] != void 0) {
err("Timestamp must not have trailing characters.");
return;
}
return ts;
};
};
var WebVTTCueTextParser = function(line, errorHandler, mode, entities) {
this.entities = entities;
var self = this;
var line = line, pos = 0, err = function(message) {
if (mode == "metadata") return;
errorHandler(message, pos + 1);
};
this.parse = function(cueStart, cueEnd) {
function removeCycles(tree) {
const cyclelessTree = { ...tree };
if (tree.children) {
cyclelessTree.children = tree.children.map(removeCycles);
}
if (cyclelessTree.parent) {
delete cyclelessTree.parent;
}
return cyclelessTree;
}
var result = { children: [] }, current = result, timestamps = [];
function attach(token2) {
current.children.push({
type: "object",
name: token2[1],
classes: token2[2],
children: [],
parent: current
});
current = current.children[current.children.length - 1];
}
function inScope(name2) {
var node = current;
while (node) {
if (node.name == name2) return true;
node = node.parent;
}
return;
}
while (line[pos] != void 0) {
var token = nextToken();
if (token[0] == "text") {
current.children.push({ type: "text", value: token[1], parent: current });
} else if (token[0] == "start tag") {
if (mode == "chapters") err("Start tags not allowed in chapter title text.");
var name = token[1];
if (name != "v" && name != "lang" && token[3] != "") {
err("Only <v> and <lang> can have an annotation.");
}
if (name == "c" || name == "i" || name == "b" || name == "u" || name == "ruby") {
attach(token);
} else if (name == "rt" && current.name == "ruby") {
attach(token);
} else if (name == "v") {
if (inScope("v")) {
err("<v> cannot be nested inside itself.");
}
attach(token);
current.value = token[3];
if (!token[3]) {
err("<v> requires an annotation.");
}
} else if (name == "lang") {
attach(token);
current.value = token[3];
} else {
err("Incorrect start tag.");
}
} else if (token[0] == "end tag") {
if (mode == "chapters") err("End tags not allowed in chapter title text.");
if (token[1] == current.name) {
current = current.parent;
} else if (token[1] == "ruby" && current.name == "rt") {
current = current.parent.parent;
} else {
err("Incorrect end tag.");
}
} else if (token[0] == "timestamp") {
if (mode == "chapters") err("Timestamp not allowed in chapter title text.");
var timings = new WebVTTCueTimingsAndSettingsParser(token[1], err), timestamp = timings.parseTimestamp();
if (timestamp != void 0) {
if (timestamp <= cueStart || timestamp >= cueEnd) {
err("Timestamp must be between start timestamp and end timestamp.");
}
if (timestamps.length > 0 && timestamps[timestamps.length - 1] >= timestamp) {
err("Timestamp must be greater than any previous timestamp.");
}
current.children.push({ type: "timestamp", value: timestamp, parent: current });
timestamps.push(timestamp);
}
}
}
while (current.parent) {
if (current.name != "v") {
err("Required end tag missing.");
}
current = current.parent;
}
return removeCycles(result);
};
function nextToken() {
var state = "data", result = "", buffer = "", classes = [];
while (line[pos - 1] != void 0 || pos == 0) {
var c = line[pos];
if (state == "data") {
if (c == "&") {
buffer = c;
state = "escape";
} else if (c == "<" && result == "") {
state = "tag";
} else if (c == "<" || c == void 0) {
return ["text", result];
} else {
result += c;
}
} else if (state == "escape") {
if (c == "<" || c == void 0) {
err("Incorrect escape.");
let m;
if (m = buffer.match(/^&#([0-9]+)$/)) {
result += String.fromCharCode(m[1]);
} else {
if (self.entities[buffer]) {
result += self.entities[buffer];
} else {
result += buffer;
}
}
return ["text", result];
} else if (c == "&") {
err("Incorrect escape.");
result += buffer;
buffer = c;
} else if (/[a-z#0-9]/i.test(c)) {
buffer += c;
} else if (c == ";") {
let m;
if (m = buffer.match(/^&#(x?[0-9]+)$/)) {
result += String.fromCharCode("0" + m[1]);
} else if (self.entities[buffer + c]) {
result += self.entities[buffer + c];
} else if (m = Object.keys(entities).find((n) => buffer.startsWith(n))) {
result += self.entities[m] + buffer.slice(m.length) + c;
} else {
err("Incorrect escape.");
result += buffer + ";";
}
state = "data";
} else {
err("Incorrect escape.");
result += buffer + c;
state = "data";
}
} else if (state == "tag") {
if (c == " " || c == "\n" || c == "\f" || c == " ") {
state = "start tag annotation";
} else if (c == ".") {
state = "start tag class";
} else if (c == "/") {
state = "end tag";
} else if (/\d/.test(c)) {
result = c;
state = "timestamp tag";
} else if (c == ">" || c == void 0) {
if (c == ">") {
pos++;
}
return ["start tag", "", [], ""];
} else {
result = c;
state = "start tag";
}
} else if (state == "start tag") {
if (c == " " || c == "\f" || c == " ") {
state = "start tag annotation";
} else if (c == "\n") {
buffer = c;
state = "start tag annotation";
} else if (c == ".") {
state = "start tag class";
} else if (c == ">" || c == void 0) {
if (c == ">") {
pos++;
}
return ["start tag", result, [], ""];
} else {
result += c;
}
} else if (state == "start tag class") {
if (c == " " || c == "\f" || c == " ") {
if (buffer) {
classes.push(buffer);
}
buffer = "";
state = "start tag annotation";
} else if (c == "\n") {
if (buffer) {
classes.push(buffer);
}
buffer = c;
state = "start tag annotation";
} else if (c == ".") {
if (buffer) {
classes.push(buffer);
}
buffer = "";
} else if (c == ">" || c == void 0) {
if (c == ">") {
pos++;
}
if (buffer) {
classes.push(buffer);
}
return ["start tag", result, classes, ""];
} else {
buffer += c;
}
} else if (state == "start tag annotation") {
if (c == ">" || c == void 0) {
if (c == ">") {
pos++;
}
buffer = buffer.split(/[\u0020\t\f\r\n]+/).filter(function(item) {
if (item) return true;
}).join(" ");
return ["start tag", result, classes, buffer];
} else {
buffer += c;
}
} else if (state == "end tag") {
if (c == ">" || c == void 0) {
if (c == ">") {
pos++;
}
return ["end tag", result];
} else {
result += c;
}
} else if (state == "timestamp tag") {
if (c == ">" || c == void 0) {
if (c == ">") {
pos++;
}
return ["timestamp", result];
} else {
result += c;
}
} else {
err("Never happens.");
}
pos++;
}
}
};
var WebVTTSerializer = function() {
function serializeTimestamp(seconds) {
const ms = ("00" + (seconds - Math.floor(seconds)).toFixed(3) * 1e3).slice(-3);
let h = 0, m = 0, s = 0;
if (seconds >= 3600) {
h = Math.floor(seconds / 3600);
}
m = Math.floor((seconds - 3600 * h) / 60);
s = Math.floor(seconds - 3600 * h - 60 * m);
return (h ? h + ":" : "") + ("" + m).padStart(2, "0") + ":" + ("" + s).padStart(2, "0") + "." + ms;
}
function serializeCueSettings(cue) {
var result = "";
const nonDefaultSettings = Object.keys(defaultCueSettings).filter((s) => cue[s] !== defaultCueSettings[s]);
if (nonDefaultSettings.includes("direction")) {
result += " vertical:" + cue.direction;
}
if (nonDefaultSettings.includes("alignment")) {
result += " align:" + cue.alignment;
}
if (nonDefaultSettings.includes("size")) {
result += " size:" + cue.size + "%";
}
if (nonDefaultSettings.includes("lineAlign") || nonDefaultSettings.includes("linePosition")) {
result += " line:" + cue.linePosition + (cue.snapToLines ? "" : "%") + (cue.lineAlign && cue.lineAlign != defaultCueSettings.lineAlign ? "," + cue.lineAlign : "");
}
if (nonDefaultSettings.includes("textPosition") || nonDefaultSettings.includes("positionAlign")) {
result += " position:" + cue.textPosition + "%" + (cue.positionAlign && cue.positionAlign !== defaultCueSettings.positionAlign ? "," + cue.positionAlign : "");
}
return result;
}
function serializeTree(tree) {
var result = "";
for (var i = 0; i < tree.length; i++) {
var node = tree[i];
if (node.type == "text") {
result += node.value.replace(/&/g, "&amp;").replace(/</g, "&lt;").replace(/>/g, "&gt;");
} else if (node.type == "object") {
result += "<" + node.name;
if (node.classes) {
for (var y = 0; y < node.classes.length; y++) {
result += "." + node.classes[y];
}
}
if (node.value) {
result += " " + node.value;
}
result += ">";
if (node.children) result += serializeTree(node.children);
result += "</" + node.name + ">";
} else if (node.type == "timestamp") {
result += "<" + serializeTimestamp(node.value) + ">";
} else {
result += "<" + node.value + ">";
}
}
return result;
}
function serializeCue(cue) {
return (cue.id !== void 0 ? cue.id + "\n" : "") + serializeTimestamp(cue.startTime) + " --> " + serializeTimestamp(cue.endTime) + serializeCueSettings(cue) + "\n" + serializeTree(cue.tree.children) + "\n\n";
}
function serializeStyle(style) {
return "STYLE\n" + style + "\n\n";
}
this.serialize = function(cues, styles) {
var result = "WEBVTT\n\n";
if (styles) {
for (var i = 0; i < styles.length; i++) {
result += serializeStyle(styles[i]);
}
}
for (var i = 0; i < cues.length; i++) {
result += serializeCue(cues[i]);
}
return result;
};
};
async function loadVtt(option, { getExt, srtToVtt, assToVtt }) {
const response = await fetch(option.url);
const buffer = await response.arrayBuffer();
const decoder = new TextDecoder(option.encoding || "utf-8");
const text = decoder.decode(buffer);
switch (option.type || getExt(option.url)) {
case "srt": {
return srtToVtt(text);
}
case "ass": {
return assToVtt(text);
}
case "vtt": {
return text;
}
default:
return "";
}
}
function mergeTrees(trees) {
const parser = new WebVTTParser();
const result = parser.parse("", "metadata");
for (let i = 0; i < trees.length; i++) {
const tree = trees[i];
if (!tree.updated) {
tree.updated = true;
for (let j = 0; j < tree.cues.length; j++) {
const cue = tree.cues[j];
for (let k = 0; k < cue.tree.children.length; k++) {
const children = cue.tree.children[k];
children.value = `<div class="art-subtitle-${tree.name}">${children.value}</div>`;
}
}
}
result.cues.push(...tree.cues);
}
return result;
}
function artplayerPluginMultipleSubtitles({ subtitles = [] }) {
return async (art) => {
const { unescape, getExt, srtToVtt, assToVtt } = art.constructor.utils;
const parser = new WebVTTParser();
const seri = new WebVTTSerializer();
const vtts = await Promise.all(
subtitles.map((option) => {
return loadVtt(option, { getExt, srtToVtt, assToVtt });
})
);
const trees = vtts.map((vtt, index) => {
const tree = parser.parse(vtt, "metadata");
tree.url = subtitles[index].url;
tree.name = subtitles[index].name;
return tree;
});
let lastUrl = "";
function setTracks(trees2 = []) {
const tree = mergeTrees(trees2);
const vtt = seri.serialize(tree.cues);
URL.revokeObjectURL(lastUrl);
const url = URL.createObjectURL(new Blob([vtt], { type: "text/vtt" }));
lastUrl = url;
art.option.subtitle.escape = false;
art.subtitle.init({
...art.option.subtitle,
url,
type: "vtt",
onVttLoad: unescape
});
}
setTracks(trees);
return {
name: "multipleSubtitles",
tracks(names = []) {
return setTracks(names.map((name) => trees.find((tree) => tree.name === name)));
},
reset() {
return setTracks(trees);
}
};
};
}
export {
artplayerPluginMultipleSubtitles as default
};