kiteqr/io.github.yuroyami.kiteqr/PlanarYUVLuminanceSource

PlanarYUVLuminanceSource

class PlanarYUVLuminanceSource(yuvData: ByteArray, dataWidth: Int, dataHeight: Int, left: Int, top: Int, width: Int, height: Int, reverseHorizontal: Boolean) : LuminanceSource

This object extends LuminanceSource around an array of YUV data returned from the camera driver, with the option to crop to a rectangle within the full data. This can be used to exclude superfluous pixels around the perimeter and speed up decoding.

It works for any pixel format where the Y channel is planar and appears first, including YCbCr_420_SP and YCbCr_422_SP.

Constructors

constructor(yuvData: ByteArray, dataWidth: Int, dataHeight: Int, left: Int, top: Int, width: Int, height: Int, reverseHorizontal: Boolean)

Types

Companion

object Companion

Functions

crop

open override fun crop(left: Int, top: Int, width: Int, height: Int): LuminanceSource

Returns a new object with cropped image data. Implementations may keep a reference to the original data rather than a copy. Only callable if isCropSupported() is true.

getHeight

fun getHeight(): Int

getMatrix

open override fun getMatrix(): ByteArray

Fetches luminance data for the underlying bitmap. Values should be fetched using: val luminance = array[y * width + x] and 0xff

getRow

open override fun getRow(y: Int, row: ByteArray?): ByteArray

Fetches one row of luminance data from the underlying platform's bitmap. Values range from 0 (black) to 255 (white). Because Kotlin does not have an unsigned byte type, callers will have to bitwise and with 0xff for each value. It is preferable for implementations of this method to only fetch this row rather than the whole image, since no 2D Readers may be installed and getMatrix() may never be called.

getThumbnailHeight

fun getThumbnailHeight(): Int

getThumbnailWidth

fun getThumbnailWidth(): Int

getWidth

fun getWidth(): Int

invert

open fun invert(): LuminanceSource

isCropSupported

open override fun isCropSupported(): Boolean

isRotateSupported

open fun isRotateSupported(): Boolean