All Implemented Interfaces:

java.lang.AutoCloseable
```
public final class Runtime
 implements AutoCloseable
                    
```
Per-conversation Essence runtime. Holds the audio-history buffer for STFT framing + the source-video cursor.
NOT THREAD-SAFE — confine each Runtime to a single thread. Share the parent Fixture across runtimes instead.

Field Summary

Fields
Modifier and Type	Field	Description
`private final Long`	`ticksAvailable`

Constructor Summary

Constructors
Constructor	Description
`Runtime(Fixture fixture)`

Method Summary

Modifier and Type	Method	Description
`final Long`	`getTicksAvailable()`
`final Integer`	`tick(FloatArray audioPCM)`	v0 tick: returns the KNN `cluster_idx` for the embedding produced by audioPCM.
`final ComposeResult`	`tickCompose(FloatArray audioPCM, Integer frameIdxHint, ByteArray frameOut)`	v1 compose tick: produces a composited BGR uint8 frame written into frameOut.
`final Unit`	`pushAudio(FloatArray audioPCM, Integer offset, Integer length)`	Push new PCM samples (16 kHz mono float32) into the streaming buffer.
`final ComposeResult`	`pullFrame(ByteArray frameOut, Integer frameIdxHint)`	Pull one composed BGR frame from the streaming buffer.
`final Unit`	`resetStream()`	Drop accumulated streaming state (mel buffer, STFT overlap, preemphasis history, cursor).
`Unit`	`close()`

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - Runtime
```
Runtime(Fixture fixture)
```
- Method Detail
  - getTicksAvailable
```
 final Long getTicksAvailable()
```
  - tick
```
 final Integer tick(FloatArray audioPCM)
```
    v0 tick: returns the KNN cluster_idx for the embedding produced by audioPCM. Input length must equal fixture.info.audioSamplesPerTick (640 = 16 kHz / 25 fps).
  - tickCompose
```
 final ComposeResult tickCompose(FloatArray audioPCM, Integer frameIdxHint, ByteArray frameOut)
```
    v1 compose tick: produces a composited BGR uint8 frame written into frameOut. Buffer length must be at least fixture.info.frameBytes.
    
    Parameters:
    
    frameIdxHint - pin to a specific base frame, or -1 to let the runtime cursor advance by 1 (wraps at sourceFrameCount).
  - pushAudio
```
 final Unit pushAudio(FloatArray audioPCM, Integer offset, Integer length)
```
    Push new PCM samples (16 kHz mono float32) into the streaming buffer. Cost is O(length) — independent of how much has already been pushed.
    Safe to interleave with pullFrame from the same thread; for cross- thread use, the caller must serialize push/pull.
  - pullFrame
```
 final ComposeResult pullFrame(ByteArray frameOut, Integer frameIdxHint)
```
    Pull one composed BGR frame from the streaming buffer. Throws BithumanException with BE_ERR_AUDIO_FORMAT if no tick is ready — check ticksAvailable first or wait until more audio has been pushed.
  - resetStream
```
 final Unit resetStream()
```
    Drop accumulated streaming state (mel buffer, STFT overlap, preemphasis history, cursor). Cheap — does not unload the model. Call between conversations or on disconnect.
  - close
```
 Unit close()
```

Class Runtime

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

Runtime

Method Detail

getTicksAvailable

tick

tickCompose

pushAudio

pullFrame

resetStream

close