Class DecodedBitStreamParser

QR Codes can encode text as bits in one of several modes, and can use multiple modes in one QR Code. This class decodes the bits back into text.

See ISO 18004:2006, 6.4.3 - 6.4.7

author: Sean Owen

Hierarchy

DecodedBitStreamParser

Index

Properties

Methods

Properties

Static Private ALPHANUMERIC_CHARS

ALPHANUMERIC_CHARS: string = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ $%*+-./:"

See ISO 18004:2006, 6.4.4 Table 5

Static Private GB2312_SUBSET

GB2312_SUBSET: number = 1

Methods

Static decode

decode(bytes: Uint8Array, version: Version, ecLevel: ErrorCorrectionLevel, hints: Map<DecodeHintType, any>): DecoderResult

- Defined in src/core/qrcode/decoder/DecodedBitStreamParser.ts:55
Parameters
- bytes: Uint8Array
- version: Version
- ecLevel: ErrorCorrectionLevel
- hints: Map<DecodeHintType, any>
Returns DecoderResult

Static Private decodeAlphanumericSegment

decodeAlphanumericSegment(bits: BitSource, result: StringBuilder, count: number, fc1InEffect: boolean): void

- Defined in src/core/qrcode/decoder/DecodedBitStreamParser.ts:267
Parameters
- bits: BitSource
- result: StringBuilder
- count: number
- fc1InEffect: boolean
Returns void

Static Private decodeByteSegment

decodeByteSegment(bits: BitSource, result: StringBuilder, count: number, currentCharacterSetECI: CharacterSetECI, byteSegments: Uint8Array[], hints: Map<DecodeHintType, any>): void

- Defined in src/core/qrcode/decoder/DecodedBitStreamParser.ts:226
Parameters
- bits: BitSource
- result: StringBuilder
- count: number
- currentCharacterSetECI: CharacterSetECI
- byteSegments: Uint8Array[]
- hints: Map<DecodeHintType, any>
Returns void

Static Private decodeHanziSegment

decodeHanziSegment(bits: BitSource, result: StringBuilder, count: number): void

- Defined in src/core/qrcode/decoder/DecodedBitStreamParser.ts:152
See specification GBT 18284-2000

Parameters
- bits: BitSource
- result: StringBuilder
- count: number
Returns void

Static Private decodeKanjiSegment

decodeKanjiSegment(bits: BitSource, result: StringBuilder, count: number): void

- Defined in src/core/qrcode/decoder/DecodedBitStreamParser.ts:189
Parameters
- bits: BitSource
- result: StringBuilder
- count: number
Returns void

Static Private decodeNumericSegment

decodeNumericSegment(bits: BitSource, result: StringBuilder, count: number): void

- Defined in src/core/qrcode/decoder/DecodedBitStreamParser.ts:306
Parameters
- bits: BitSource
- result: StringBuilder
- count: number
Returns void

Static Private parseECIValue

parseECIValue(bits: BitSource): number

- Defined in src/core/qrcode/decoder/DecodedBitStreamParser.ts:348
Parameters
- bits: BitSource
Returns number

Static Private toAlphaNumericChar

toAlphaNumericChar(value: number): string

- Defined in src/core/qrcode/decoder/DecodedBitStreamParser.ts:260
Parameters
- value: number
Returns string

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