microsoft-cognitiveservices-speech-sdk/distrib/lib/src/common/ChunkedArrayBufferStream.d.ts.map

Microsoft Cognitive Services Speech SDK for JavaScript

{"version":3,"sources":["src/common/ChunkedArrayBufferStream.ts"],"names":[],"mappings":"AAGA,OAAO,EAAE,YAAY,EAAE,MAAM,EAAE,MAAM,cAAc,CAAC;AAEpD,qBAAa,wBAAyB,SAAQ,MAAM,CAAC,WAAW,CAAC;IAC7D,OAAO,CAAC,mBAAmB,CAAS;IACpC,OAAO,CAAC,qBAAqB,CAAc;IAC3C,OAAO,CAAC,uBAAuB,CAAS;IACxC,OAAO,CAAC,wBAAwB,CAAS;gBAEtB,eAAe,EAAE,MAAM,EAAE,QAAQ,CAAC,EAAE,MAAM;IAMtD,gBAAgB,CAAC,KAAK,EAAE,YAAY,CAAC,WAAW,CAAC,GAAG,IAAI;IAuCxD,KAAK,IAAI,IAAI;CAYvB","file":"ChunkedArrayBufferStream.d.ts","sourcesContent":["// Copyright (c) Microsoft Corporation. All rights reserved.\r\n// Licensed under the MIT license.\r\n\r\nimport { IStreamChunk, Stream } from \"./Exports.js\";\r\n\r\nexport class ChunkedArrayBufferStream extends Stream<ArrayBuffer> {\r\n    private privTargetChunkSize: number;\r\n    private privNextBufferToWrite: ArrayBuffer;\r\n    private privNextBufferStartTime: number;\r\n    private privNextBufferReadyBytes: number;\r\n\r\n    public constructor(targetChunkSize: number, streamId?: string) {\r\n        super(streamId);\r\n        this.privTargetChunkSize = Math.round(targetChunkSize);\r\n        this.privNextBufferReadyBytes = 0;\r\n    }\r\n\r\n    public writeStreamChunk(chunk: IStreamChunk<ArrayBuffer>): void {\r\n        // No pending write, and the buffer is the right size so write it.\r\n        if (chunk.isEnd ||\r\n            (0 === this.privNextBufferReadyBytes && chunk.buffer.byteLength === this.privTargetChunkSize)) {\r\n            super.writeStreamChunk(chunk);\r\n            return;\r\n        }\r\n\r\n        let bytesCopiedFromBuffer: number = 0;\r\n\r\n        while (bytesCopiedFromBuffer < chunk.buffer.byteLength) {\r\n            // Fill the next buffer.\r\n            if (undefined === this.privNextBufferToWrite) {\r\n                this.privNextBufferToWrite = new ArrayBuffer(this.privTargetChunkSize);\r\n                this.privNextBufferStartTime = chunk.timeReceived;\r\n            }\r\n\r\n            // Find out how many bytes we can copy into the read buffer.\r\n            const bytesToCopy: number = Math.min(chunk.buffer.byteLength - bytesCopiedFromBuffer, this.privTargetChunkSize - this.privNextBufferReadyBytes);\r\n            const targetView: Uint8Array = new Uint8Array(this.privNextBufferToWrite);\r\n            const sourceView: Uint8Array = new Uint8Array(chunk.buffer.slice(bytesCopiedFromBuffer, bytesToCopy + bytesCopiedFromBuffer));\r\n\r\n            targetView.set(sourceView, this.privNextBufferReadyBytes);\r\n            this.privNextBufferReadyBytes += bytesToCopy;\r\n            bytesCopiedFromBuffer += bytesToCopy;\r\n\r\n            // Are we ready to write?\r\n            if (this.privNextBufferReadyBytes === this.privTargetChunkSize) {\r\n                super.writeStreamChunk({\r\n                    buffer: this.privNextBufferToWrite,\r\n                    isEnd: false,\r\n                    timeReceived: this.privNextBufferStartTime,\r\n                });\r\n                this.privNextBufferReadyBytes = 0;\r\n                this.privNextBufferToWrite = undefined;\r\n            }\r\n        }\r\n    }\r\n\r\n    public close(): void {\r\n        // Send whatever is pending, then close the base class.\r\n        if (0 !== this.privNextBufferReadyBytes && !this.isClosed) {\r\n            super.writeStreamChunk({\r\n                buffer: this.privNextBufferToWrite.slice(0, this.privNextBufferReadyBytes),\r\n                isEnd: false,\r\n                timeReceived: this.privNextBufferStartTime,\r\n            });\r\n        }\r\n\r\n        super.close();\r\n    }\r\n}\r\n"]}