kgilmer

    private final Transformation mirror = new Transformation() {
        @Override
        public Bitmap transform(Bitmap source) {
            Matrix m = new Matrix();
            m.preScale(-1, 1);
            Bitmap src = source;
            Bitmap dst = Bitmap.createBitmap(src, 0, 0, src.getWidth(), src.getHeight(), m, false);
            dst.setDensity(DisplayMetrics.DENSITY_DEFAULT);
            src.recycle();
            return dst;

kgilmer

{
  "music": [
    {
    "title": "Jazz in Paris",
    "album": "Jazz & Blues",
    "artist": "Media Right Productions",
    "genre": "Jazz & Blues",
    "source": "Jazz_In_Paris.mp3",
    "image": "album_art.jpg",
    "trackNumber": 1,

kgilmer

import java.io.File

fun main(args: Array<String>) {
    File(args[0])
            .walk()
            .forEach { sourceFile ->
        println("Reading $sourceFile")
    }
}

kgilmer

fun main(args: Array<String>) {
    File(args[0])
            .walk()
            .filter { it.isFile && it.extension.equals("mp3", ignoreCase = true) }
            .forEach { sourceFile ->
        println("Reading $sourceFile")
    }
}

kgilmer

import org.jaudiotagger.audio.AudioFileIO
import java.io.File

fun main(args: Array<String>) {
    File(args[0])
        .walk()
        .filter { it.isFile && it.extension.equals("mp3", ignoreCase = true) }
        .forEach { sourceFile ->
            val audioFile = AudioFileIO.read(sourceFile)
            println("Reading $audioFile")

kgilmer

fun extractMetadataOrNull(audioFile: AudioFile): JsonObject? {
    val js = JsonObject()

    with(audioFile.tag ?: return null) {
        js["title"] = getFirst(FieldKey.TITLE) ?: return null
        js["artist"] = getFirst(FieldKey.ARTIST) ?: getFirst(FieldKey.ALBUM_ARTIST) ?: return null
        js["album"] = getFirst(FieldKey.ALBUM) ?: return null
        js["genre"] = if (getFirst(FieldKey.GENRE).isNullOrBlank()) "unknown" else getFirst(FieldKey.GENRE)
        js["source"] = audioFile.file.absolutePath
        js["image"] = ""

kgilmer

fun readAudioFileOrNull(file: File): AudioFile? =
        try { AudioFileIO.read(file) } catch (e: Exception) { null }

kgilmer

fun main(args: Array<String>) {
  File(args[0])
      .walk()
      .mapNotNull { file ->
        readAudioFileOrNull(file)
      }
      .mapNotNull { audioFile ->
        extractMetadataOrNull(audioFile)
      }
      .forEach { println(it) }

kgilmer

val manifestWriter = System.out.writer()

manifestWriter.use {
  sourceDirectory
    .walk()
    .filter {
      it.isFile && it.extension.equals("mp3", ignoreCase = true)
    }
    .mapNotNull { file ->
      readAudioFileOrNull(file)

kgilmer

val sourceDirectory = File(args.getOrNull(0) ?: System.getProperty("user.dir"))