Spaces:
Running
Running
File size: 2,897 Bytes
ec50620 |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 |
/**
* Copyright 2024 Google LLC
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* 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.
*/
const SafariAudioRecordingWorklet = `
class AudioProcessingWorklet extends AudioWorkletProcessor {
// Safari seems to work better with smaller buffer sizes
// and more frequent updates
buffer = new Int16Array(1024);
bufferWriteIndex = 0;
lastProcessTime = 0;
sampleRate = 0;
constructor(options) {
super();
console.log('Safari AudioProcessingWorklet constructed with options:', options);
this.sampleRate = options.processorOptions?.sampleRate || sampleRate;
console.log('Using sample rate:', this.sampleRate);
}
process(inputs) {
// Log processing details periodically
const now = currentTime;
if (now - this.lastProcessTime > 1) {
console.log('Safari AudioProcessingWorklet processing:', {
inputChannels: inputs[0]?.length,
inputSamples: inputs[0]?.[0]?.length,
bufferWriteIndex: this.bufferWriteIndex,
time: now
});
this.lastProcessTime = now;
}
if (!inputs[0]?.length) {
console.warn('No input channels available');
return true;
}
const channel0 = inputs[0][0];
if (!channel0?.length) {
console.warn('Empty input channel');
return true;
}
this.processChunk(channel0);
return true;
}
sendAndClearBuffer() {
if (this.bufferWriteIndex > 0) {
this.port.postMessage({
event: "chunk",
data: {
int16arrayBuffer: this.buffer.slice(0, this.bufferWriteIndex).buffer,
},
});
this.bufferWriteIndex = 0;
}
}
processChunk(float32Array) {
// Safari can sometimes send empty arrays or undefined
if (!float32Array?.length) {
return;
}
const l = float32Array.length;
for (let i = 0; i < l; i++) {
// Convert float32 -1 to 1 to int16 -32768 to 32767
// Add some additional gain for Safari which tends to be quieter
const int16Value = Math.max(-32768, Math.min(32767, float32Array[i] * 32768 * 1.5));
this.buffer[this.bufferWriteIndex++] = int16Value;
if (this.bufferWriteIndex >= this.buffer.length) {
this.sendAndClearBuffer();
}
}
// Make sure to send any remaining data
if (this.bufferWriteIndex > 0) {
this.sendAndClearBuffer();
}
}
}
`;
export default SafariAudioRecordingWorklet; |