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b8cc2bf | 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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 | /**
* BufferWorkerClient
*
* Main-thread API for the centralized BufferWorker.
* Provides promise-based reads and fire-and-forget writes.
*/
import type {
LayerId,
BufferWorkerConfig,
BufferWorkerResponse,
HasSpeechResult,
RangeResult,
BufferState,
} from './types';
export class BufferWorkerClient {
private worker: Worker;
private messageId = 0;
private pendingPromises = new Map<number, { resolve: (v: any) => void; reject: (e: any) => void }>();
private ready = false;
constructor() {
this.worker = new Worker(new URL('./buffer.worker.ts', import.meta.url), {
type: 'module',
});
this.worker.onmessage = (e: MessageEvent<BufferWorkerResponse>) => {
this.handleMessage(e.data);
};
this.worker.onerror = (e: Event) => {
const err = e as ErrorEvent;
console.error('[BufferWorkerClient] Worker error:', err.message);
for (const [, p] of this.pendingPromises) {
p.reject(new Error(err.message || 'BufferWorker error'));
}
this.pendingPromises.clear();
};
}
// ---- Lifecycle ----
async init(config: BufferWorkerConfig): Promise<void> {
await this.sendRequest('INIT', config);
this.ready = true;
}
async reset(): Promise<void> {
await this.sendRequest('RESET', undefined);
}
dispose(): void {
this.worker.terminate();
for (const [, p] of this.pendingPromises) {
p.reject(new Error('BufferWorkerClient disposed'));
}
this.pendingPromises.clear();
this.ready = false;
}
// ---- Producers (fire-and-forget for low latency) ----
/**
* Write a single scalar value to a VAD layer (energyVad or inferenceVad).
* Fire-and-forget for minimal latency.
*/
writeScalar(layer: LayerId, value: number): void {
if (!this.ready) return;
this.worker.postMessage({
type: 'WRITE',
payload: { layer, data: [value] },
});
}
/**
* Write a multi-dimensional entry (e.g., mel spectrogram frame).
* Transfers the buffer for zero-copy.
*/
writeEntry(layer: LayerId, data: Float32Array): void {
if (!this.ready) return;
const copy = new Float32Array(data);
this.worker.postMessage(
{ type: 'WRITE', payload: { layer, data: copy } },
[copy.buffer]
);
}
/**
* Write a batch of entries to a layer. Transfers the buffer.
*/
writeBatch(layer: LayerId, data: Float32Array, globalSampleOffset?: number): void {
if (!this.ready) return;
const copy = new Float32Array(data);
this.worker.postMessage(
{ type: 'WRITE_BATCH', payload: { layer, data: copy, globalSampleOffset } },
[copy.buffer]
);
}
/**
* Write a batch of entries to a layer by transferring ownership of the buffer.
* The caller must not reuse `data` after calling this.
*/
writeBatchTransfer(layer: LayerId, data: Float32Array, globalSampleOffset?: number): void {
if (!this.ready) return;
this.worker.postMessage(
{ type: 'WRITE_BATCH', payload: { layer, data, globalSampleOffset } },
[data.buffer]
);
}
/**
* Write raw audio samples. Fire-and-forget with buffer transfer.
*/
writeAudio(samples: Float32Array): void {
if (!this.ready) return;
const copy = new Float32Array(samples);
this.worker.postMessage(
{ type: 'WRITE_BATCH', payload: { layer: 'audio' as LayerId, data: copy } },
[copy.buffer]
);
}
// ---- Consumers (async queries) ----
/**
* Check if any VAD entry exceeds a threshold in a sample range.
* Used by v4Tick to decide whether to trigger transcription.
*/
async hasSpeech(
layer: 'energyVad' | 'inferenceVad',
startSample: number,
endSample: number,
threshold: number,
): Promise<HasSpeechResult> {
return this.sendRequest('HAS_SPEECH', { layer, startSample, endSample, threshold });
}
/**
* Get the duration of trailing silence from the write head.
* Scans backward in the specified VAD layer until a probability >= threshold is found.
*/
async getSilenceTailDuration(
layer: 'energyVad' | 'inferenceVad',
threshold: number,
): Promise<number> {
const result = await this.sendRequest('GET_SILENCE_TAIL', { layer, threshold });
return result.durationSec;
}
/**
* Query data for an arbitrary sample range across multiple layers.
* Returns correlated slices from each requested layer.
*/
async queryRange(
startSample: number,
endSample: number,
layerIds: LayerId[],
): Promise<RangeResult> {
return this.sendRequest('QUERY_RANGE', { startSample, endSample, layers: layerIds });
}
/**
* Get a snapshot of the buffer state for debugging / UI.
*/
async getState(): Promise<BufferState> {
return this.sendRequest('GET_STATE', undefined);
}
// ---- Internal ----
private handleMessage(msg: BufferWorkerResponse): void {
if (msg.type === 'ERROR') {
const p = this.pendingPromises.get(msg.id);
if (p) {
this.pendingPromises.delete(msg.id);
p.reject(new Error(msg.payload));
}
return;
}
if (msg.id !== undefined) {
const p = this.pendingPromises.get(msg.id);
if (p) {
this.pendingPromises.delete(msg.id);
p.resolve(msg.payload);
}
}
}
private sendRequest(type: string, payload: any): Promise<any> {
return new Promise((resolve, reject) => {
const id = ++this.messageId;
this.pendingPromises.set(id, { resolve, reject });
this.worker.postMessage({ type, payload, id });
});
}
}
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