Like LEGO Batman would say - "First Try!" Kotlin api.acoustid.org/v2/ hello-world lookup

salamanders · August 18, 2020, 4:24pm

He says ‘First Try’ after trying and missing many times

Whohoo! I was able to get some Kotlin working and use api.acoustid.org/v2/ to lookup a song!

I searched for and found code in GitHub that was very interwoven with the rest of the app. If anyone is looking for a more stand-alone version, maybe my code would be useful.

Note and Warning: My code isn’t optimized, hardened, or tested. I would think of it as a “Hello World” to get from File to JSON to Object to Artist/Album/TrackName. As such, I welcome any and all feedback.

(eg. it would be nicer to the server if I compressed the request, right?)

github.com

salamanders/dedupmusic/blob/855d90bac49dd8ecbe67f9b3184f3e7df42f8d90/src/main/kotlin/info/benjaminhill/audio/SongTagger.kt#L27



private val PREFIX_DUR = "DURATION="
private val PREFIX_FP = "FINGERPRINT="
private val MY_CLIENT_ID = "kDv3v9F2WP"

/**
 * @return artist, album, song_name
 */
@ExperimentalCoroutinesApi
@ExperimentalTime
suspend fun tag(file: File): Triple<String, String, String> {
    require(file.canRead()) { "Unable to read file '${file.absolutePath}'" }

    // "-signed" for pg_acoustid compatibility
    val fpcalcLines = runCommand(
        command = arrayOf("fpcalc", "-signed", file.absolutePath),
        maxDuration = 10.seconds
    ).toList()

    val duration = fpcalcLines
        .first { it.startsWith(PREFIX_DUR) }