implement mp3 bitrate rounding up

src/dl/ffmpeg.rs

@@ -3,6 +3,17 @@ use super::spawn::{spawn, SpawnError};
 pub struct FFMpeg {}
 
 impl FFMpeg {
+    const MP3_BITRATES: [u16; 14] = [
+        32, 40, 48, 56, 64, 80, 96, 112, 128, 160, 192, 224, 256, 320,
+    ];
+    pub fn round_mp3_bitrate(abr: f32) -> u16 {
+        let abr = abr.ceil() as u16;
+        Self::MP3_BITRATES
+            .into_iter()
+            .find(|f| abr <= *f)
+            .unwrap_or(320)
+    }
+
     pub async fn convert_to_mp3(
         input_path: &str,
         output_path: &str,

src/dl/yt_dlp.rs

@@ -131,7 +131,7 @@ impl YtDlpInfo {
 #[derive(Debug)]
 pub enum YtDlpError {
     SpawnError(SpawnError),
-    ErrorMessage(String),   // keep it separate type if we ever plan to parse yt-dlp errors
+    ErrorMessage(String), // keep it separate type if we ever plan to parse yt-dlp errors
     JsonError,
 }
 
@@ -139,7 +139,7 @@ impl From<SpawnError> for YtDlpError {
     fn from(value: SpawnError) -> Self {
         match value {
             SpawnError::ErrorMessage(msg) => Self::ErrorMessage(msg),
-            _ => Self::SpawnError(value)
+            _ => Self::SpawnError(value),
         }
     }
 }

src/main.rs

@@ -11,6 +11,7 @@ use teloxide::dispatching::UpdateHandler;
 use teloxide::{prelude::*, update_listeners::Polling, utils::command::BotCommands};
 
 mod dl;
+use dl::ffmpeg::FFMpeg;
 use dl::yt_dlp::YtDlp;
 
 type State = ();
@@ -50,6 +51,8 @@ async fn main() -> anyhow::Result<()> {
     let audio = info.best_audio_format().unwrap();
     println!("{}", audio);
 
+    println!("abr {}", FFMpeg::round_mp3_bitrate(129.492));
+
     Ok(())
     //bot_main().await
 }