fix: encode renders as wav instead of opus to address errors

src/render_data.rs

@@ -1,7 +1,7 @@
-use std::{convert::Infallible, fmt::Display};
+use std::{convert::Infallible, fmt::Display, io::Cursor};
 
+use hound::{SampleFormat, WavSpec};
 use opendal::Operator;
-use opus2::Application;
 use time::{UtcDateTime, format_description::StaticFormatDescription, macros::format_description};
 use twilight_model::id::{
     Id,
@@ -42,7 +42,7 @@ impl Display for Render {
         let start = start.format(&DATE_FORMAT).unwrap();
         let end = end.format(&DATE_FORMAT).unwrap();
 
-        write!(f, "{guild_id}/{voice_channel_id}/{start}_{end}.opus")
+        write!(f, "{guild_id}/{voice_channel_id}/{start}_{end}.wav")
     }
 }
 
@@ -66,24 +66,32 @@ impl RenderManager {
         (),
         Infallible, // TODO: a real error type
     > {
-        let mut encoder =
-            opus2::Encoder::new(sample_rate, channels, Application::Audio).expect("TODO");
+        let channels = channels as u16;
 
-        let estimated_max_size = samples.len() * size_of::<i16>() / size_of::<u8>();
-        tracing::debug!(?estimated_max_size);
-        let encode_result = encoder.encode_vec(&samples, estimated_max_size);
-        if let Err(error) = &encode_result {
-            tracing::error!(%error);
-        } else {
-            tracing::info!("encode ok");
+        let wav_spec = WavSpec {
+            channels,
+            sample_rate,
+            bits_per_sample: 16,
+            sample_format: SampleFormat::Int,
+        };
+
+        let mut buffer = Vec::new();
+        let writer = Cursor::new(&mut buffer);
+
+        let mut wav_writer = hound::WavWriter::new(writer, wav_spec).expect("TODO");
+
+        let mut sample_writer = wav_writer.get_i16_writer(samples.len() as u32);
+
+        for sample in samples {
+            sample_writer.write_sample(sample);
         }
-        let bytes = encode_result.expect("TODO");
+        sample_writer.flush().expect("TODO");
+
+        wav_writer.finalize().expect("TODO");
 
         let path = render.to_string();
 
-        let write_result = self.operator.write(&path, bytes).await;
-        tracing::info!(?write_result);
-        write_result.expect("TODO");
+        self.operator.write(&path, buffer).await.expect("TODO");
 
         Ok(())
     }