build(spf): build26 from 45504a2b

dist/dev/media/hls/parse-attributes.js

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+//#region src/media/hls/parse-attributes.ts
+/**
+* Parse HLS attribute list from a tag line.
+* Handles both quoted and unquoted values.
+*/
+function parseAttributeList(line) {
+	const attributes = /* @__PURE__ */ new Map();
+	for (const match of line.matchAll(/([A-Z0-9-]+)=(?:"([^"]*)"|([^,]*))/g)) {
+		const key = match[1];
+		const value = match[2] ?? match[3] ?? "";
+		if (key) attributes.set(key, value);
+	}
+	return attributes;
+}
+/**
+* Parse RESOLUTION attribute value (WIDTHxHEIGHT).
+*/
+function parseResolution(value) {
+	const match = /^(\d+)x(\d+)$/.exec(value);
+	if (!match) return null;
+	return {
+		width: Number.parseInt(match[1], 10),
+		height: Number.parseInt(match[2], 10)
+	};
+}
+/**
+* Parse FRAME-RATE attribute to rational frame rate.
+*/
+function parseFrameRate(value) {
+	const fps = Number.parseFloat(value);
+	if (Number.isNaN(fps) || fps <= 0) return void 0;
+	if (Math.abs(fps - 23.976) < .01) return {
+		frameRateNumerator: 24e3,
+		frameRateDenominator: 1001
+	};
+	if (Math.abs(fps - 29.97) < .01) return {
+		frameRateNumerator: 3e4,
+		frameRateDenominator: 1001
+	};
+	if (Math.abs(fps - 59.94) < .01) return {
+		frameRateNumerator: 6e4,
+		frameRateDenominator: 1001
+	};
+	if (fps % 1 === 0) return { frameRateNumerator: Math.round(fps) };
+	return { frameRateNumerator: Math.round(fps) };
+}
+const AUDIO_CODEC_PREFIXES = [
+	"mp4a.",
+	"ac-3",
+	"ec-3",
+	"ac-4",
+	"opus",
+	"flac",
+	"dts",
+	"alac",
+	"vorbis"
+];
+/**
+* Parse CODECS attribute into separate video and audio codecs.
+*/
+function parseCodecs(codecs) {
+	const parts = codecs.split(",").map((s) => s.trim());
+	const result = {};
+	for (const codec of parts) {
+		const lower = codec.toLowerCase();
+		if (codec.startsWith("avc1.") || codec.startsWith("hvc1.") || codec.startsWith("hev1.")) result.video = codec;
+		else if (AUDIO_CODEC_PREFIXES.some((prefix) => lower.startsWith(prefix))) result.audio = codec;
+	}
+	return result;
+}
+/**
+* Parse #EXTINF duration value.
+*/
+function parseExtInfDuration(value) {
+	const durationPart = value.split(",")[0] ?? value;
+	const duration = Number.parseFloat(durationPart);
+	return Number.isNaN(duration) ? 0 : duration;
+}
+/**
+* Parse BYTERANGE attribute value.
+* Format: "length[@offset]"
+* If offset is omitted, it continues from the previous byte range end.
+*/
+function parseByteRange(value, previousEnd) {
+	const match = /^(\d+)(?:@(\d+))?$/.exec(value);
+	if (!match) return null;
+	const length = Number.parseInt(match[1], 10);
+	if (Number.isNaN(length)) return null;
+	let start;
+	if (match[2] !== void 0) {
+		start = Number.parseInt(match[2], 10);
+		if (Number.isNaN(start)) return null;
+	} else if (previousEnd !== void 0) start = previousEnd;
+	else return null;
+	return {
+		start,
+		end: start + length - 1
+	};
+}
+/**
+* Create AttributeList from raw attribute string.
+*/
+function createAttributeList(line) {
+	const map = parseAttributeList(line);
+	return {
+		get(key) {
+			return map.get(key);
+		},
+		getInt(key, defaultValue) {
+			const value = map.get(key);
+			if (value === void 0) return defaultValue;
+			const parsed = Number.parseInt(value, 10);
+			return Number.isNaN(parsed) ? defaultValue : parsed;
+		},
+		getFloat(key, defaultValue) {
+			const value = map.get(key);
+			if (value === void 0) return defaultValue;
+			const parsed = Number.parseFloat(value);
+			return Number.isNaN(parsed) ? defaultValue : parsed;
+		},
+		getBool(key) {
+			return map.get(key) === "YES";
+		},
+		getResolution(key) {
+			const value = map.get(key);
+			if (!value) return void 0;
+			return parseResolution(value) ?? void 0;
+		},
+		getFrameRate(key) {
+			const value = map.get(key);
+			if (!value) return void 0;
+			return parseFrameRate(value);
+		}
+	};
+}
+/**
+* Match a tag and extract its attributes.
+* Returns null if the line doesn't match the tag.
+*/
+function matchTag(line, tag) {
+	const prefix = `#${tag}:`;
+	if (!line.startsWith(prefix)) return null;
+	return createAttributeList(line.slice(prefix.length));
+}
+//#endregion
+export { createAttributeList, matchTag, parseAttributeList, parseByteRange, parseCodecs, parseExtInfDuration, parseFrameRate, parseResolution };
+
+//# sourceMappingURL=parse-attributes.js.map