fun getBackgroundBlurredBitmap()

in amazon-chime-sdk/src/main/java/com/amazonaws/services/chime/sdk/meetings/audiovideo/video/backgroundfilter/backgroundblur/BackgroundBlurVideoFrameProcessor.kt [116:147]

25 lines of code
1 McCabe index (conditional complexity)


    fun getBackgroundBlurredBitmap(inputBitmap: Bitmap, frame: VideoFrame): Bitmap? {
        val width = frame.getRotatedWidth()
        val height = frame.getRotatedHeight()
        val scaleFactor = 3

        val scaledInputBitmap =
            backgroundFilterVideoFrameProcessor.getScaledInputBitmap(frame, inputBitmap)
        val maskedBitmap =
            backgroundFilterVideoFrameProcessor.getSegmentationMask(scaledInputBitmap)
        // When creating scaled bitmap, we set filter to true as it provides better image quality with smooth edges around persons boundary.
        val upScaledMaskedBitmap = maskedBitmap?.let { Bitmap.createScaledBitmap(it, width, height, true) }

        val downScaledInputBitmap = Bitmap.createScaledBitmap(inputBitmap, width / scaleFactor, height / scaleFactor, false)

        // Blur image.
        configurations?.let {
            blurProcessor.initialize(
                downScaledInputBitmap.width,
                downScaledInputBitmap.height,
                it.blurStrength
            )
        }
        val blurredBitmap = blurProcessor.process(downScaledInputBitmap)
        // When creating scaled bitmap, we set filter to false as it does not add much value to blurred image quality and decreases performance when enabled
        val upScaledBlurredBitmap = blurredBitmap?.let { Bitmap.createScaledBitmap(it, width, height, false) }

        return backgroundFilterVideoFrameProcessor.drawImageWithMask(
            inputBitmap,
            upScaledMaskedBitmap,
            upScaledBlurredBitmap
        )
    }