add open function for audio

bingus/src/lib.rs

@@ -12,6 +12,8 @@ mod dynamic {
         path::Path,
     };
 
+    use crate::snd::{self, Audio};
+
     use super::{
         img::{self, DynamicImage},
         Bytes,
@@ -26,7 +28,7 @@ mod dynamic {
     pub enum DynamicBendable {
         Image(DynamicImage),
         Binary(Bytes),
-        Sound,
+        Sound(Audio),
         Text,
     }
 
@@ -36,6 +38,8 @@ mod dynamic {
         Io(#[from] io::Error),
         #[error("{0:?}")]
         Image(#[from] img::ImageError),
+        #[error("{0:?}")]
+        Audio(#[from] snd::AudioOpenError),
     }
 
     pub fn open<P: AsRef<Path>>(path: P) -> Result<Option<DynamicBendable>, OpenError> {
@@ -50,7 +54,7 @@ mod dynamic {
                         File::open(path)?.read_to_end(&mut buf)?;
                         buf
                     })),
-                    Audio => todo!(),
+                    Audio => Some(DynamicBendable::Sound(crate::snd::Audio::open(path)?)),
                     Book => todo!(),
                     Doc => todo!(),
                     Font => todo!(),

bingus/src/snd.rs

@@ -1,4 +1,5 @@
 pub use symphonia::core::sample::Sample;
 mod raw;
-pub use raw::RawSamples;
+pub use raw::*;
 mod simphonia;
+pub use simphonia::*;

bingus/src/snd/simphonia.rs

@@ -1,4 +1,8 @@
-use std::io::{self, Read};
+use std::{
+    fs::File,
+    io::{self, Read},
+    path::Path,
+};
 
 use derive_new::new;
 use symphonia::{
@@ -14,6 +18,7 @@ use symphonia::{
     },
     default,
 };
+use thiserror::Error;
 
 use crate::{IntoDataBytes, TryFromDataBytes};
 
@@ -28,6 +33,33 @@ pub struct Audio {
     decoder: Box<dyn Decoder>,
 }
 
+#[derive(Debug, Error)]
+pub enum AudioOpenError {
+    #[error("IO error: {0}")]
+    Io(#[from] io::Error),
+    #[error("symphonia can't open this file: {0}")]
+    Symphonia(#[from] symphonia::core::errors::Error),
+}
+
+impl Audio {
+    pub fn open<P: AsRef<Path>>(path: P) -> Result<Audio, AudioOpenError> {
+        let registry = default::get_codecs();
+        let probe = default::get_probe();
+        let mediasource = File::open(path.as_ref())?;
+        let mss = MediaSourceStream::new(Box::new(mediasource), Default::default());
+        let reader = probe
+            .format(
+                &Default::default(),
+                mss,
+                &Default::default(),
+                &Default::default(),
+            )?
+            .format;
+        let decoder = registry.make(&Default::default(), &Default::default())?;
+        Ok(Audio::new(reader, decoder))
+    }
+}
+
 impl TryFromDataBytes for Audio {
     type Error = Error;
     type Format = Hint;