add flac encoding format

src/config.rs

@@ -32,6 +32,12 @@ pub enum Transcode {
         bitrate_type: BitrateType,
     },
 
+    #[serde(rename = "flac")]
+    Flac {
+        #[serde(default = "default_flac_compression")]
+        compression: u8,
+    },
+
     #[serde(rename = "mp3")]
     Mp3 {
         #[serde(default = "default_mp3_bitrate")]
@@ -46,6 +52,7 @@ impl Transcode {
     pub fn extension(&self) -> &'static str {
         match self {
             Transcode::Opus { .. } => "opus",
+            Transcode::Flac { .. } => "flac",
             Transcode::Mp3 { .. } => "mp3",
         }
     }
@@ -55,6 +62,10 @@ fn default_opus_bitrate() -> u16 {
     160
 }
 
+fn default_flac_compression() -> u8 {
+    5
+}
+
 fn bitrate_type_vbr() -> BitrateType {
     BitrateType::Vbr
 }

src/main.rs

@@ -352,6 +352,13 @@ async fn transcode(
                     dest_elems.push(encoder);
                     dest_elems.push(gmake("oggmux")?);
                 }
+
+                config::Transcode::Flac { compression } => {
+                    let encoder: Element = gmake("flacenc")?;
+                    encoder.set_property_from_str("quality", &compression.to_string());
+                    dest_elems.push(encoder);
+                }
+
                 config::Transcode::Mp3 {
                     bitrate,
                     bitrate_type,