Add .gitignore to exclude all node packages and lock files

2026-02-23 21:56:04 -05:00
parent faae96c9ed
commit dcc5c6c044
9747 changed files with 1555105 additions and 2 deletions
@@ -0,0 +1,57 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.getSamplePositions = void 0;
+const getSamplePositions = ({ stcoBox, stszBox, stscBox, stssBox, sttsBox, cttsBox, }) => {
+    var _a;
+    const sttsDeltas = [];
+    for (const distribution of sttsBox.sampleDistribution) {
+        for (let i = 0; i < distribution.sampleCount; i++) {
+            sttsDeltas.push(distribution.sampleDelta);
+        }
+    }
+    const cttsEntries = [];
+    for (const entry of (_a = cttsBox === null || cttsBox === void 0 ? void 0 : cttsBox.entries) !== null && _a !== void 0 ? _a : [
+        { sampleCount: sttsDeltas.length, sampleOffset: 0 },
+    ]) {
+        for (let i = 0; i < entry.sampleCount; i++) {
+            cttsEntries.push(entry.sampleOffset);
+        }
+    }
+    let dts = 0;
+    const chunks = stcoBox.entries;
+    const samples = [];
+    let samplesPerChunk = 1;
+    for (let i = 0; i < chunks.length; i++) {
+        const hasEntry = stscBox.entries.get(i + 1);
+        if (hasEntry !== undefined) {
+            samplesPerChunk = hasEntry;
+        }
+        let offsetInThisChunk = 0;
+        for (let j = 0; j < samplesPerChunk; j++) {
+            const size = stszBox.countType === 'fixed'
+                ? stszBox.sampleSize
+                : stszBox.entries[samples.length];
+            const isKeyframe = stssBox
+                ? stssBox.sampleNumber.has(samples.length + 1)
+                : true;
+            const delta = sttsDeltas[samples.length];
+            const ctsOffset = cttsEntries[samples.length];
+            const cts = dts + ctsOffset;
+            samples.push({
+                offset: Number(chunks[i]) + offsetInThisChunk,
+                size,
+                isKeyframe,
+                decodingTimestamp: dts,
+                timestamp: cts,
+                duration: delta,
+                chunk: i,
+                bigEndian: false,
+                chunkSize: null,
+            });
+            dts += delta;
+            offsetInThisChunk += size;
+        }
+    }
+    return samples;
+};
+exports.getSamplePositions = getSamplePositions;