filmstrip-test/dev.jordond.filmstrip.test

Package-level declarations

Types

FrameComparison

class FrameComparison(val psnrDb: Double, val ssim: Double, val meanAbsoluteDifference: Double)

The outcome of comparing two frames.

class TestFrame(val pixels: ByteArray, val size: Size)

A frame held as tightly packed RGBA_8888, row-major, with no row padding.

object ToneAnalysis

Measures how much of one frequency a block of decoded audio carries.

Properties

DEFAULT_MIN_PSNR_DB

const val DEFAULT_MIN_PSNR_DB: Double = 40.0

PSNR at or above which two frames are treated as the same, in decibels.

DEFAULT_MIN_SSIM

const val DEFAULT_MIN_SSIM: Double = 0.995

SSIM at or above which two frames are treated as the same.

PREVIEW_PARITY_EXPORT_BITRATE

val PREVIEW_PARITY_EXPORT_BITRATE: Bitrate

The video bitrate a preview parity suite exports at when it compares a preview frame against the written file.

Functions

assertFramesDiffer

fun assertFramesDiffer(expected: TestFrame, actual: TestFrame, minPsnrDb: Double = DEFAULT_MIN_PSNR_DB, minSsim: Double = DEFAULT_MIN_SSIM, message: String? = null)

Fails unless actual differs from expected by more than the tolerances.

assertFramesSimilar

fun assertFramesSimilar(expected: TestFrame, actual: TestFrame, minPsnrDb: Double = DEFAULT_MIN_PSNR_DB, minSsim: Double = DEFAULT_MIN_SSIM, message: String? = null)

Fails unless actual matches expected closely enough to be the same frame.

fun compareFrames(expected: TestFrame, actual: TestFrame): FrameComparison

Compares two frames of the same size, perceptually rather than byte for byte.