r = null;
    let latencyVideoChecker = null;

    function playerCreateVideoRendererBuffer() {
        videoRendererBuffer = new VideoRenderBuffer();
    }
    
    function playerClearVideoRendererBuffer() {
        if (videoRendererBuffer != null) {
            videoRendererBuffer.Clear();
        }
        videoRendererBuffer = null;
    }

    function playerJitterAudioDroppedCallback(data) {
        console.warn(`[AUDIO-JITTER] Dropped late audio frame. seqId: ${data.seqId}, currentSeqId:${data.firstB