1 files changed, 31 insertions, 0 deletions
diff --git a/src/creator.rs b/src/creator.rs
new file mode 100644
index 0000000..bda3719
--- /dev/null
+++ b/src/creator.rs
@@ -0,0 +1,31 @@
+use std::convert::TryFrom as _;
+
+pub struct Creator {
+    base_time: Option<std::time::Instant>,
+}
+
+impl Creator {
+    pub fn new() -> Self {
+        Default::default()
+    }
+
+    pub fn frame(&mut self, data: &[u8]) -> crate::error::Result<Vec<u8>> {
+        let cur_time = std::time::Instant::now();
+        let base_time = if let Some(base_time) = &self.base_time {
+            base_time
+        } else {
+            self.base_time = Some(cur_time);
+            self.base_time.as_ref().unwrap()
+        };
+        Vec::<u8>::try_from(crate::frame::Frame {
+            time: cur_time - *base_time,
+            data: data.to_vec(),
+        })
+    }
+}
+
+impl Default for Creator {
+    fn default() -> Self {
+        Self { base_time: None }
+    }
+}