[Example] ChatTTS: remove write byte function

wasmedge-chatTTS/README.md

@@ -58,5 +58,12 @@ let config_data = serde_json::to_string(&json!({"prompt": "[oral_2][laugh_0][bre
         .as_bytes()
         .to_vec();
 ```
+<table>
+<tr>
+<td>
 
-And it is the [Demo speaker](./assets/demo.wav).
+[demo.webm](https://github.com/user-attachments/assets/377e0487-9107-41db-9c22-31962ce53f88)
+
+</td>
+</tr>
+</table>

wasmedge-chatTTS/src/main.rs

@@ -4,14 +4,14 @@ use wasmedge_wasi_nn::{
     self, ExecutionTarget, GraphBuilder, GraphEncoding, GraphExecutionContext, TensorType,
 };
 
-fn get_data_from_context(context: &GraphExecutionContext, index: usize, limit: usize) -> Vec<u8> {
+fn get_data_from_context(context: &GraphExecutionContext, index: usize) -> Vec<u8> {
     const MAX_OUTPUT_BUFFER_SIZE: usize = 4096 * 4096;
     let mut output_buffer = vec![0u8; MAX_OUTPUT_BUFFER_SIZE];
-    let _ = context
+    let bytes_written = context
         .get_output(index, &mut output_buffer)
         .expect("Failed to get output");
 
-    return output_buffer[..limit].to_vec();
+    return output_buffer[..bytes_written].to_vec();
 }
 
 fn main() {
@@ -35,9 +35,7 @@ fn main() {
         .set_input(1, TensorType::U8, &[1], &config_data)
         .expect("Failed to set input");
     context.compute().expect("Failed to compute");
-    let bytes_written = get_data_from_context(&context, 1, 4);
-    let bytes_written = usize::from_le_bytes(bytes_written.as_slice().try_into().unwrap());
-    let output_bytes = get_data_from_context(&context, 0, bytes_written);
+    let output_bytes = get_data_from_context(&context, 0);
     let spec = hound::WavSpec {
         channels: 1,
         sample_rate: 24000,