Enterprise Streaming Architecture &
High-Performance Media Engine

class QuantumStreamProxyServer(port: Int = 8999) : NanoHTTPD(port) {
  private val ringBuffer = CircularByteBuffer(32 * 1024 * 1024)
  override fun serve(session: IHTTPSession): Response {
    return newChunkedResponse(Status.OK, "video/mp2t", ringBuffer.stream)
  }
}

class ResilientHttpDataSource : HttpDataSource {
  override fun open(dataSpec: DataSpec): Long {
    val sanitized = dataSpec.buildUpon().setHttpRequestHeaders(normalize(dataSpec)).build()
    return upstreamDataSource.open(sanitized)
  }
}

fun buildLoadControl(isLive: Boolean): DefaultLoadControl {
  return DefaultLoadControl.Builder()
    .setBufferDurationsMs(if (isLive) 2500 else 15000, 50000, 1500, 3000)
    .setPrioritizeTimeOverSizeThresholds(true).build()
}

fun applyDspPreset(sessionId: Int, preset: DspPreset) {
  val eq = Equalizer(0, sessionId).apply { enabled = true }
  preset.bandGains.forEachIndexed { band, gain ->
    eq.setBandLevel(band.toShort(), gain.toShort())
  }
}

class NetworkAnomalyDetector(
  private val connectivityManager: ConnectivityManager,
  private val telemetryBus: SharedFlow<TelemetryEvent>
) {
  private val chunkVelocityWindow = EvictingQueue<Long>(capacity = 5)
  private var isThrottlingMitigationActive = false

  fun evaluateChunkIngress(chunkSizeBytes: Long, transferDurationMs: Long) {
    val calculatedThroughputKbps = (chunkSizeBytes * 8) / (transferDurationMs.coerceAtLeast(1))
    chunkVelocityWindow.add(calculatedThroughputKbps)
    val linkBandwidthKbps = connectivityManager.getActiveNetworkCapabilities()?.linkDownstreamBandwidthKbps ?: 0

    // Detect artificial throughput suppression against physical interface capacity
    if (chunkVelocityWindow.isStable() && calculatedThroughputKbps < (linkBandwidthKbps * ANOMALY_THRESHOLD)) {
      if (!isThrottlingMitigationActive) {
        isThrottlingMitigationActive = true
        telemetryBus.tryEmit(TelemetryEvent.IspThrottlingDetected(
          degradationFactor = (linkBandwidthKbps - calculatedThroughputKbps) / linkBandwidthKbps.toFloat()
        ))
        // Triggers local loopback proxy socket cycling & header normalization
        QuantumStreamProxyServer.cycleActiveSocketPipeline()
      }
    }
  }

  companion object {
    private const val ANOMALY_THRESHOLD = 0.35f // 65% artificial suppression marker
  }
}