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 +1,42 @@
+const TARGET_NUMBER_OF_CHANNELS = 2;
+const TARGET_SAMPLE_RATE = 48000;
+function mixAudio(waves, length) {
+    if (waves.length === 1 && waves[0].length === length) {
+        return waves[0];
+    }
+    const mixed = new Int16Array(length);
+    if (waves.length === 1) {
+        mixed.set(waves[0].subarray(0, length));
+        return mixed;
+    }
+    for (let i = 0; i < length; i++) {
+        const sum = waves.reduce((acc, wave) => {
+            var _a;
+            return acc + ((_a = wave[i]) !== null && _a !== void 0 ? _a : 0);
+        }, 0);
+        // Clamp to Int16 range
+        mixed[i] = Math.max(-32768, Math.min(32767, sum));
+    }
+    return mixed;
+}
+export const onlyInlineAudio = ({ assets, fps, frame, }) => {
+    const inlineAudio = assets.filter((asset) => asset.type === 'inline-audio');
+    if (inlineAudio.length === 0) {
+        return null;
+    }
+    const expectedLength = Math.round((TARGET_NUMBER_OF_CHANNELS * TARGET_SAMPLE_RATE) / fps);
+    for (const asset of inlineAudio) {
+        if (asset.toneFrequency !== 1) {
+            throw new Error('Setting the toneFrequency is not supported yet in web rendering.');
+        }
+    }
+    const mixedAudio = mixAudio(inlineAudio.map((asset) => asset.audio), expectedLength);
+    return new AudioData({
+        data: mixedAudio,
+        format: 's16',
+        numberOfChannels: TARGET_NUMBER_OF_CHANNELS,
+        numberOfFrames: expectedLength / TARGET_NUMBER_OF_CHANNELS,
+        sampleRate: TARGET_SAMPLE_RATE,
+        timestamp: (frame / fps) * 1000000,
+    });
+};