Class TAvifReader

Unit

Declaration

type TAvifReader = class(TObject)

Description

Reader for AVIF images or animations (not derived from TFPCustomImageReader)

Hierarchy

TObject
TAvifReader

Overview

Fields

	`FDecoder: PavifDecoder;`
	`FDecoderWrap: TObject;`
	`FHeight: uint32;`
	`FImageDurationSeconds: double;`
	`FImageDurationTimescales: UInt64;`
	`FStream: TStream;`
	`FStreamOwned: boolean;`
	`FWidth: uint32;`

Methods

	`constructor Create(AFileName: string); virtual; overload;`
	`constructor Create(AStream: TStream; AStreamOwned: boolean = false); virtual; overload;`
	`destructor Destroy; override;`
	`class function CreateDecoder: PavifDecoder;`
	`function GetNextImage(AOutBitmap: TBGRACustomBitmap): boolean;`
	`function GetNthImage(AOutBitmap: TBGRACustomBitmap; AImageIndex: uint32): boolean;`
	`function GetDecoder: avifCodecChoice;`
	`class procedure DestroyDecoder(var ADecoder: PavifDecoder);`
	`procedure Close;`
	`procedure Init(AStream: TStream; AStreamOwned: boolean);`
	`procedure SetDecoder(ACodec: avifCodecChoice);`

Properties

	`property Decoder: avifCodecChoice read GetDecoder write SetDecoder;`
	`property Height: uint32 read FHeight;`
	`property ImageCount: uint32 read GetImageCount;`
	`property ImageDurationSeconds: double read FImageDurationSeconds;`
	`property ImageDurationTimescales: uint64 read FImageDurationTimescales;`
	`property ImageIndex: integer read GetImageIndex;`
	`property RepetitionCount: integer read GetRepetitionCount;`
	`property SequenceDuration: double read GetSequenceDuration;`
	`property Timescale: uint64 read GetTimescale;`
	`property Width: uint32 read FWidth;`

Description

Fields

	`FDecoder: PavifDecoder;`
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	`FDecoderWrap: TObject;`
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	`FHeight: uint32;`
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	`FImageDurationSeconds: double;`
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	`FImageDurationTimescales: UInt64;`
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	`FStream: TStream;`
TDecoderBase;

	`FStreamOwned: boolean;`
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	`FWidth: uint32;`
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Methods

	`constructor Create(AFileName: string); virtual; overload;`
call before unloading libavif

	`constructor Create(AStream: TStream; AStreamOwned: boolean = false); virtual; overload;`
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	`destructor Destroy; override;`
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	`class function CreateDecoder: PavifDecoder;`
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	`function GetNextImage(AOutBitmap: TBGRACustomBitmap): boolean;`
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	`function GetNthImage(AOutBitmap: TBGRACustomBitmap; AImageIndex: uint32): boolean;`
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	`function GetDecoder: avifCodecChoice;`
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	`class procedure DestroyDecoder(var ADecoder: PavifDecoder);`
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	`procedure Close;`
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	`procedure Init(AStream: TStream; AStreamOwned: boolean);`
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	`procedure SetDecoder(ACodec: avifCodecChoice);`
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Properties

	`property Decoder: avifCodecChoice read GetDecoder write SetDecoder;`
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	`property Height: uint32 read FHeight;`
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	`property ImageCount: uint32 read GetImageCount;`
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	`property ImageDurationSeconds: double read FImageDurationSeconds;`
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	`property ImageDurationTimescales: uint64 read FImageDurationTimescales;`
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	`property ImageIndex: integer read GetImageIndex;`
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	`property RepetitionCount: integer read GetRepetitionCount;`
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	`property SequenceDuration: double read GetSequenceDuration;`
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	`property Timescale: uint64 read GetTimescale;`
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	`property Width: uint32 read FWidth;`
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