Add bitrate() method

examples/player.rs

@@ -32,7 +32,7 @@ fn main() {
             ec.conn.connect_ports(&ch, &port).unwrap();
         }
     }
-    println!("Chans: {} Sample rate: {} Duration: {}", file.channels(), file.sample_rate(), file.duration());
+    println!("Chans: {} Sample rate: {} Duration: {} Bitrate: {}", file.channels(), file.sample_rate(), file.duration(), file.bitrate());
     let thr = ::std::thread::spawn(move || {
         loop {
             for x in &mut file {

src/lib.rs

@@ -165,6 +165,9 @@ impl MediaFile {
     pub fn sample_rate(&self) -> usize {
         (unsafe { (*self.audio_ctx).sample_rate }) as usize
     }
+    pub fn bitrate(&self) -> usize {
+        (unsafe { (*self.format_ctx).bit_rate }) as usize
+    }
     pub fn duration(&self) -> Duration {
         let dur = unsafe { (*self.format_ctx).duration };
         Duration::microseconds(dur)