- * @param inbuf Pointer to sample data.
- * @param inbuflen Length in bytes of the buffer.
- * @param unitsize The number of bytes per sample.
+ * @param inbuf Pointer to sample data. Must not be NULL.
+ * @param inbuflen Length in bytes of the buffer. Must be > 0.
+ * @param unitsize The number of bytes per sample. Must be > 0.