Direct Media Player Component

CanvasPlayerComponent

private inner class CanvasPlayerComponent : DirectMediaPlayerComponent(CanvasBufferFormatCallback()) {
        internal var pixelWriter: PixelWriter? = null
        private val pw: PixelWriter?
            get() {
                if (pixelWriter == null) {
                    pixelWriter = writableImage?.getPixelWriter()
                }
                return pixelWriter
            }

        override fun display(
            mediaPlayer: DirectMediaPlayer?,
            nativeBuffers: Array<Memory>?,
            bufferFormat: BufferFormat?
        ) {
            if (writableImage == null) {
                return
            }
            Platform.runLater {
                try {
                    val nativeBuffer = mediaPlayer!!.lock()[0]
                    val byteBuffer = nativeBuffer.getByteBuffer(0, nativeBuffer.size())
                    val y = stackPaneMain.height.minus(bufferFormat?.height!!).div(2).toInt()
                    pw!!.setPixels(
                        0,
                        y,
                        bufferFormat.width,
                        bufferFormat.height,
                        writablePixelFormat,
                        byteBuffer,
                        bufferFormat.pitches[0]
                    )
                } catch (e: Exception) {
                    log.warn("nativeBuffer is null:", e.message)
                } finally {
                    mediaPlayer?.unlock()
                }
            }
        }
    }