chunkToFloat32Array.ts•1.35 kB
/**
* Copyright (C) 2025 by Fonoster Inc (https://fonoster.com)
* http://github.com/fonoster/fonoster
*
* This file is part of Fonoster
*
* Licensed under the MIT License (the "License");
* you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* https://opensource.org/licenses/MIT
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
function chunkToFloat32Array(chunk: Uint8Array): Float32Array {
// Create a DataView to handle endianness explicitly
const dataView = new DataView(
chunk.buffer,
chunk.byteOffset,
chunk.byteLength
);
const floatArray = new Float32Array(chunk.byteLength / 2);
// Convert each 16-bit sample to float32, explicitly handling little-endian
for (let i = 0; i < floatArray.length; i++) {
// Read 16-bit value with explicit little-endian
const int16Value = dataView.getInt16(i * 2, true); // true = little-endian
// Normalize to [-1, 1]
floatArray[i] = int16Value / 32768.0;
}
return floatArray;
}
export { chunkToFloat32Array };