Add new SendStreamCaption command

src/client/streaming.rs

@@ -29,4 +29,13 @@ impl<'a> Streaming<'a> {
     pub async fn stop_stream(&self) -> Result<()> {
         self.client.send_message(RequestType::StopStream).await
     }
+
+    /// Sends CEA-608 caption text over the stream output.
+    ///
+    /// - `caption_text`: Caption text.
+    pub async fn send_stream_caption(&self, caption_text: &str) -> Result<()> {
+        self.client
+            .send_message(RequestType::SendStreamCaption { caption_text })
+            .await
+    }
 }

src/requests/mod.rs

@@ -548,6 +548,11 @@ pub(crate) enum RequestType<'a> {
     ToggleStream,
     StartStream,
     StopStream,
+    #[serde(rename_all = "camelCase")]
+    SendStreamCaption {
+        /// Caption text.
+        caption_text: &'a str,
+    },
 }
 
 #[derive(Clone, Copy, Serialize)]