coroutineContext

Override the coroutine context for the engine actor and helper coroutines.

Default: SupervisorJob() + Dispatchers.Default.

Platform note on Dispatchers.Default:

• JVM / Android: backed by a shared work-stealing pool sized to max(2, Runtime.availableProcessors() - 1). Suitable for CPU-bound coding/decoding.

• iOS / native: backed by a fixed multi-threaded worker pool sized to Runtime.availableProcessors() (kotlinx.coroutines ≥ 1.7's "new memory model" default). The engine's actor invariant (single-writer, see ADR-002) is preserved regardless of pool size — the actor channel serialises writes itself.

Pass a SupervisorJob in your context if you need cancellation control independent of the SDK; the SDK does not install one for you when you override this.

// Hilt / lifecycle-scoped:
.coroutineContext(viewModelScope.coroutineContext + SupervisorJob())

// Tests:
.coroutineContext(testScope.backgroundScope.coroutineContext)