AI with character.

.package(url: "https://gitlab.com/bithuman/sdk/homebrew-bithuman", from: "2.22.1")

let engine = try Expression2Engine.create(
    avatarContainer: avatarURL,              // wise-pup.imx
    sharedEngineContainer: sharedEngineURL,  // mac-arm64-1.0.0.engine
    stagingDir: stagingURL)                  // any writable directory; keep it between launches

engine.feed(samples)   // [Float], 16 kHz mono
engine.flushTail()     // end of the reply
for await frame in engine.frames(audioClock: { played() }) {
    show(frame.bgr, frame.width, frame.height)                        // B, G, R bytes
    if frame.audioTime == 0 { player.scheduleBuffer(reply, completionHandler: nil); player.play() }   // the reply's first frame: start its audio
    if frame.endsReply { break }                                      // the reply is over; idle frames follow
}

implementation("ai.bithuman:expression2-android:0.6.2")

Expression2Avatar.create(context, model, Expression2Options()).use { avatar ->
    val frame = avatar.newFrameBitmap()   // 416 x 720, allocate once
    avatar.feed(pcm16k)
    avatar.flushTail()                    // end of the utterance
    while (true) {
        if (avatar.pull(frame) != null) { show(frame); continue }
        if (!avatar.hasPendingTail && avatar.queuedFrames == 0) break
        Thread.sleep(10)                  // null means "not ready yet"
    }
}