@azure/communication-call-automation
Version:
Azure client library for Azure Communication Call Automation services
92 lines • 4.33 kB
JavaScript
// Copyright (c) Microsoft Corporation.
// Licensed under the MIT License.
import { createIdentifierFromRawId } from "@azure/communication-common";
/** Class to handle the parsing of incoming streaming data. */
export class StreamingData {
/** Parses a encoded json string or buffer into a StreamingData object,
which can be one of the following subtypes: AudioData, AudioMetadata, TranscriptionData, or TranscriptionMetadata. */
static parse(data) {
return StreamingData.parseStreamingData(data);
}
// Get Streaming data Kind.
static getStreamingKind() {
return StreamingData.streamingKind;
}
/** Parses a encoded json string or buffer into a StreamingData object,
which can be one of the following subtypes: AudioData, AudioMetadata, TranscriptionData, or TranscriptionMetadata. */
static parseStreamingData(data) {
let stringJson;
if (typeof data === "string") {
stringJson = data;
}
else {
const decoder = new TextDecoder();
stringJson = decoder.decode(data);
}
const jsonObject = JSON.parse(stringJson);
const kind = jsonObject.kind;
switch (kind) {
case "TranscriptionMetadata": {
const transcriptionMetadata = {
subscriptionId: jsonObject.transcriptionMetadata.subscriptionId,
locale: jsonObject.transcriptionMetadata.locale,
callConnectionId: jsonObject.transcriptionMetadata.callConnectionId,
correlationId: jsonObject.transcriptionMetadata.correlationId,
speechRecognitionModelEndpointId: jsonObject.transcriptionMetadata.speechRecognitionModelEndpointId,
};
StreamingData.streamingKind = kind;
return transcriptionMetadata;
}
case "TranscriptionData": {
const transcriptionData = {
text: jsonObject.transcriptionData.text,
format: jsonObject.transcriptionData.format,
confidence: jsonObject.transcriptionData.confidence,
offsetInTicks: jsonObject.transcriptionData.offset,
durationInTicks: jsonObject.transcriptionData.duration,
words: jsonObject.transcriptionData.words.map((word) => ({
text: word.text,
offsetInTicks: word.offset,
durationInTicks: word.duration,
})),
participant: createIdentifierFromRawId(jsonObject.transcriptionData.participantRawID),
resultState: jsonObject.transcriptionData.resultStatus,
};
StreamingData.streamingKind = kind;
return transcriptionData;
}
case "AudioMetadata": {
const audioMetadata = {
subscriptionId: jsonObject.audioMetadata.subscriptionId,
encoding: jsonObject.audioMetadata.encoding,
sampleRate: jsonObject.audioMetadata.sampleRate,
channels: jsonObject.audioMetadata.channels,
};
StreamingData.streamingKind = kind;
return audioMetadata;
}
case "AudioData": {
const audioData = {
data: jsonObject.audioData.data,
timestamp: jsonObject.audioData.timestamp,
isSilent: jsonObject.audioData.silent,
participant: jsonObject.audioData.participantRawID !== undefined
? createIdentifierFromRawId(jsonObject.audioData.participantRawID)
: undefined,
};
StreamingData.streamingKind = kind;
return audioData;
}
case "DtmfData": {
const dtmfData = {
data: jsonObject.dtmfData.data,
};
StreamingData.streamingKind = kind;
return dtmfData;
}
default:
throw new Error("Unknown data kind: " + jsonObject.kind);
}
}
}
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