48387633

Committed 28 Oct 2023 05:34AM UTC coverage: 92.442% (+0.5%) from 91.899%

Build # 48387633

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web-flow

Commit Message

Merge 6a78b5713 into f0c9477b7

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3250 of 4147 branches covered (0.0%)

Branch coverage included in aggregate %.

1763 of 1763 new or added lines in 39 files covered. (100.0%)

26753 of 28309 relevant lines covered (94.5%)

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17.39

/src/mpeg4/boxes/isoChunkLargeOffsetBox.ts

import FullBox from "./fullBox";
import Mpeg4BoxHeader from "../mpeg4BoxHeader";
import {ByteVector} from "../../byteVector";
import {File} from "../../file";
import {Guards} from "../../utils";

/**
 *  This class extends @see FullBox to provide an implementation of a ISO/IEC 14496-12 ChunkLargeOffsetBox.
 *  @TODO: Is this pretty much the same as the non-large offset box?
 */
export default class IsoChunkLargeOffsetBox extends FullBox {
    private _offsetTable: number[];

    /**
     * Private constructor to force construction via static functions.
     */
    private constructor() {
        super();
    }

    /**
     * Constructs and initializes a new instance of @see IsoChunkLargeOffsetBox with a provided header
     * and handler by reading the contents from a specified file.
     * @param header A @see Mpeg4BoxHeader object containing the header to use for the new instance.
     * @param file A @see File object to read the contents of the box from.
     * @param handlerType Type of the handler box object containing the handler that applies to the
     *     new instance, or undefined if no handler applies.
     * @returns
     */
    public static fromFile(header: Mpeg4BoxHeader, file: File, handlerType: ByteVector): IsoChunkLargeOffsetBox {
        const instance = new IsoChunkLargeOffsetBox();
        instance.initializeFromHeaderFileAndHandler(header, file, handlerType);

        const boxData = file.readBlock(instance.dataSize);
        instance._offsetTable = new Array(boxData.subarray(0, 4).toUint());

        for (let i = 0; i < instance._offsetTable.length; i++) {
            instance._offsetTable[i] = Number(boxData.subarray(4 + i * 8, 8).toUlong());
        }

        return instance;
    }

    /**
     * Gets and sets the data contained in the current instance.
     */
    public get data(): ByteVector {
        const output = ByteVector.fromUint(this._offsetTable.length);
        for (let i = 0; i < this._offsetTable.length; i++) {
            output.addByteVector(ByteVector.fromUlong(this._offsetTable[i]));
        }

        return output;
    }

    /**
     * Updates the existing box position offsets.
     * @param sizeDifference A value containing the size change that occurred in the file.
     * @param after A value containing the position in the file after which offsets will be invalidated. If an
     *     offset is before this point, it won't be updated.
     * @internal
     */
    public updatePosition(sizeDifference: number, after: number): void {
        Guards.safeUint(sizeDifference, "sizeDifference");
        Guards.safeUint(after, "after");

        for (let i = 0; i < this._offsetTable.length; i++) {
            if (this._offsetTable[i] >= after) {
                this._offsetTable[i] = this._offsetTable[i] + sizeDifference;
            }
        }
    }
}

1	import FullBox from "./fullBox";	1✔
2	import Mpeg4BoxHeader from "../mpeg4BoxHeader";
3	import {ByteVector} from "../../byteVector";	1✔
4	import {File} from "../../file";
5	import {Guards} from "../../utils";	1✔
6
7	/**
8	* This class extends @see FullBox to provide an implementation of a ISO/IEC 14496-12 ChunkLargeOffsetBox.
9	* @TODO: Is this pretty much the same as the non-large offset box?
10	*/
11	export default class IsoChunkLargeOffsetBox extends FullBox {	1✔
12	private _offsetTable: number[];
13
14	/**
15	* Private constructor to force construction via static functions.
16	*/
17	private constructor() {
18	super();	×
19	}
20
21	/**
22	* Constructs and initializes a new instance of @see IsoChunkLargeOffsetBox with a provided header
23	* and handler by reading the contents from a specified file.
24	* @param header A @see Mpeg4BoxHeader object containing the header to use for the new instance.
25	* @param file A @see File object to read the contents of the box from.
26	* @param handlerType Type of the handler box object containing the handler that applies to the
27	* new instance, or undefined if no handler applies.
28	* @returns
29	*/
30	public static fromFile(header: Mpeg4BoxHeader, file: File, handlerType: ByteVector): IsoChunkLargeOffsetBox {
31	const instance = new IsoChunkLargeOffsetBox();	×
32	instance.initializeFromHeaderFileAndHandler(header, file, handlerType);	×
33
34	const boxData = file.readBlock(instance.dataSize);	×
35	instance._offsetTable = new Array(boxData.subarray(0, 4).toUint());	×
36
37	for (let i = 0; i < instance._offsetTable.length; i++) {	×
38	instance._offsetTable[i] = Number(boxData.subarray(4 + i * 8, 8).toUlong());	×
39	}
40
41	return instance;	×
42	}
43
44	/**
45	* Gets and sets the data contained in the current instance.
46	*/
47	public get data(): ByteVector {
48	const output = ByteVector.fromUint(this._offsetTable.length);	×
49	for (let i = 0; i < this._offsetTable.length; i++) {	×
50	output.addByteVector(ByteVector.fromUlong(this._offsetTable[i]));	×
51	}
52
53	return output;	×
54	}
55
56	/**
57	* Updates the existing box position offsets.
58	* @param sizeDifference A value containing the size change that occurred in the file.
59	* @param after A value containing the position in the file after which offsets will be invalidated. If an
60	* offset is before this point, it won't be updated.
61	* @internal
62	*/
63	public updatePosition(sizeDifference: number, after: number): void {
64	Guards.safeUint(sizeDifference, "sizeDifference");	×
65	Guards.safeUint(after, "after");	×
66
67	for (let i = 0; i < this._offsetTable.length; i++) {	×
68	if (this._offsetTable[i] >= after) {	×
69	this._offsetTable[i] = this._offsetTable[i] + sizeDifference;	×
70	}
71	}
72	}
73	}

benrr101 / node-taglib-sharp / 48387633

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