jpegxr

type AdaptiveContext struct {
	// Symbol counts for probability estimation
	Counts map[int]int

	// Total count
	Total int

	// Context ID
	ID int
}

type AdaptiveQuantizer struct {
	BaseParams *QuantizationParams

	// Per-tile QP adjustments
	TileQPDelta map[int]int

	// Per-macroblock QP delta (for fine-grained control)
	MBQPDelta map[int]int
}

type Code struct {
	Bits   uint32 // The code bits
	Length int    // Number of bits
}

type DeadZoneQuantizer struct {
	Params   *QuantizationParams
	DeadZone float64 // Dead zone factor (0.0-1.0, typically 0.5)
}

type Decoder struct {
	Info   *ImageInfo
	Config *EncoderConfig
	// contains filtered or unexported fields
}

type Encoder struct {
	Config *EncoderConfig
	Info   *ImageInfo
	// contains filtered or unexported fields
}

type EncoderConfig struct {
	// Quality level (0-100, 100 = best quality/lossless)
	Quality int

	// Overlap mode
	UseOverlap bool

	// Tile configuration
	Tiles TileConfig

	// Frequency mode (DC only, DC+LP, or DC+LP+HP)
	FrequencyMode FrequencyMode

	// Alpha plane encoding
	EncodeAlpha  bool
	AlphaQuality int

	// Subsampling mode
	Subsampling SubsamplingMode
}

type EntropyDecoder struct {

	// VLC tables
	DCTable *VLCTable
	LPTable *VLCTable
	// contains filtered or unexported fields
}

type EntropyEncoder struct {

	// VLC tables
	DCTable *VLCTable
	LPTable *VLCTable
	// contains filtered or unexported fields
}

type FrequencyMode int

type HierarchicalTransform struct {
	PCT *PhotoCoreTransform
	POT *PhotoOverlapTransform

	// DC coefficients from first stage
	DCCoeffs []int

	// Transform mode
	UseOverlap bool
}

type ImageInfo struct {
	Width       int
	Height      int
	NumChannels int
	BitDepth    int
	PixelFormat PixelFormat
	HasAlpha    bool
}

type PhotoCoreTransform struct {
	// Scaling factor for fixed-point arithmetic
	Scale int
}

type PhotoOverlapTransform struct {
	// Filter coefficients
	S0, S1 int
}

type PixelFormat int

type QuantizationParams struct {
	// Quantization parameter for each band
	DCQP int // DC quantization parameter (0-255)
	LPQP int // LP quantization parameter (0-255)
	HPQP int // HP quantization parameter (0-255)

	// Derived quantization step sizes
	DCStep int
	LPStep int
	HPStep int
}

type Quantizer struct {
	Params *QuantizationParams
}

type SubsamplingMode int

type TileConfig struct {
	Enabled    bool
	TileWidth  int
	TileHeight int
	NumTilesX  int
	NumTilesY  int
}

type VLCTable struct {
	// Codes maps symbols to their VLC representation
	Codes map[int]Code

	// MaxCodeLength is the maximum code length in bits
	MaxCodeLength int

	// Name identifies this table
	Name string
}