| sampleIndex | 分析器示例的索引。 |
| metadataIndex | 元数据索引。 |
float 返回示例元数据值的 float 型表示形式。
以 float 型获取示例元数据值。
用于获取与示例相关联的其他数据。metadataIndex 必须介于 0 至 GetSampleMetadataCount 之间。
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