/// <summary>
/// 设置单独预览的视频流buffer回调函数，可用于预览进行显示
/// </summary>
/// <param name="callback">单独推流的buffer回调</param>
private void SetSoloPreviewCallback(ChildVideoSamplerCallback callback)
{
ThrowIfChildServiceException();
ChildVideoApi.SetSoloPreviewCallback(ChildService, callback);
}
public ChildVideoApiProvider()
{
_videoSamplerCallback = new ChildVideoSamplerCallback(OnVideoSamplerChanged);
}
internal static extern void SetSoloPreviewCallback(IntPtr childService, ChildVideoSamplerCallback callback);