@picovoice/porcupine-node/dist/wave_util.js

Picovoice Porcupine Node.js binding

//
// Copyright 2020-2022 Picovoice Inc.
//
// You may not use this file except in compliance with the license. A copy of the license is located in the "LICENSE"
// file accompanying this source.
//
// 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.
//
"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.getInt16Frames = exports.checkWaveFile = void 0;
function chunkArray(array, size) {
    return Array.from({ length: Math.ceil(array.length / size) }, (v, index) => array.slice(index * size, index * size + size));
}
function checkWaveFile(waveFile, engineSampleRate) {
    let valid = true;
    if (waveFile.bitDepth !== "16") {
        // eslint-disable-next-line no-console
        console.error("Audio bit depth must be 16-bit");
        valid = false;
    }
    if (waveFile.fmt.numChannels !== 1) {
        // eslint-disable-next-line no-console
        console.error("Audio must be single channel");
        valid = false;
    }
    if (waveFile.fmt.sampleRate !== engineSampleRate) {
        // eslint-disable-next-line no-console
        console.error(`Audio sample rate ${waveFile.sampleRate} does not match Porcupine sample rate ${engineSampleRate}`);
        valid = false;
    }
    return valid;
}
exports.checkWaveFile = checkWaveFile;
function getInt16Frames(waveFile, frameLength) {
    const samples = waveFile.getSamples(false, Int16Array);
    const frames = chunkArray(samples, frameLength);
    // throw out remainder / partial frame
    if (frames[frames.length - 1].length !== frameLength) {
        frames.pop();
    }
    return frames;
}
exports.getInt16Frames = getInt16Frames;
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