minor cleanup

audio/src/fetch.rs

@@ -138,19 +138,19 @@ impl StreamLoaderController {
         })
     }
 
-    fn send_stream_loader_command(&mut self, command: StreamLoaderCommand) {
-        if let Some(ref mut channel) = self.channel_tx {
+    fn send_stream_loader_command(&self, command: StreamLoaderCommand) {
+        if let Some(ref channel) = self.channel_tx {
             // ignore the error in case the channel has been closed already.
             let _ = channel.send(command);
         }
     }
 
-    pub fn fetch(&mut self, range: Range) {
+    pub fn fetch(&self, range: Range) {
         // signal the stream loader to fetch a range of the file
         self.send_stream_loader_command(StreamLoaderCommand::Fetch(range));
     }
 
-    pub fn fetch_blocking(&mut self, mut range: Range) {
+    pub fn fetch_blocking(&self, mut range: Range) {
         // signal the stream loader to tech a range of the file and block until it is loaded.
 
         // ensure the range is within the file's bounds.
@@ -182,47 +182,43 @@ impl StreamLoaderController {
                 {
                     // For some reason, the requested range is neither downloaded nor requested.
                     // This could be due to a network error. Request it again.
-                    // We can't use self.fetch here because self can't be borrowed mutably, so we access the channel directly.
-                    if let Some(ref mut channel) = self.channel_tx {
-                        // ignore the error in case the channel has been closed already.
-                        let _ = channel.send(StreamLoaderCommand::Fetch(range));
-                    }
+                    self.fetch(range);
                 }
             }
         }
     }
 
-    pub fn fetch_next(&mut self, length: usize) {
+    pub fn fetch_next(&self, length: usize) {
         if let Some(ref shared) = self.stream_shared {
             let range = Range {
                 start: shared.read_position.load(atomic::Ordering::Relaxed),
-                length: length,
+                length,
             };
             self.fetch(range)
         }
     }
 
-    pub fn fetch_next_blocking(&mut self, length: usize) {
+    pub fn fetch_next_blocking(&self, length: usize) {
         if let Some(ref shared) = self.stream_shared {
             let range = Range {
                 start: shared.read_position.load(atomic::Ordering::Relaxed),
-                length: length,
+                length,
             };
             self.fetch_blocking(range);
         }
     }
 
-    pub fn set_random_access_mode(&mut self) {
+    pub fn set_random_access_mode(&self) {
         // optimise download strategy for random access
         self.send_stream_loader_command(StreamLoaderCommand::RandomAccessMode());
     }
 
-    pub fn set_stream_mode(&mut self) {
+    pub fn set_stream_mode(&self) {
         // optimise download strategy for streaming
         self.send_stream_loader_command(StreamLoaderCommand::StreamMode());
     }
 
-    pub fn close(&mut self) {
+    pub fn close(&self) {
         // terminate stream loading and don't load any more data for this file.
         self.send_stream_loader_command(StreamLoaderCommand::Close());
     }
@@ -230,11 +226,8 @@ impl StreamLoaderController {
 
 pub struct AudioFileStreaming {
     read_file: fs::File,
-
     position: u64,
-
     stream_loader_command_tx: mpsc::UnboundedSender<StreamLoaderCommand>,
-
     shared: Arc<AudioFileShared>,
 }
 
@@ -332,10 +325,7 @@ impl AudioFile {
     }
 
     pub fn is_cached(&self) -> bool {
-        match self {
-            AudioFile::Cached { .. } => true,
-            _ => false,
-        }
+        matches!(self, AudioFile::Cached { .. })
     }
 }
 
@@ -359,7 +349,7 @@ impl AudioFileStreaming {
         let size = BigEndian::read_u32(&data) as usize * 4;
 
         let shared = Arc::new(AudioFileShared {
-            file_id: file_id,
+            file_id,
             file_size: size,
             stream_data_rate: streaming_data_rate,
             cond: Condvar::new(),
@@ -396,11 +386,10 @@ impl AudioFileStreaming {
 
         session.spawn(fetcher);
         Ok(AudioFileStreaming {
-            read_file: read_file,
+            read_file,
             position: 0,
-            //seek: seek_tx,
-            stream_loader_command_tx: stream_loader_command_tx,
-            shared: shared,
+            stream_loader_command_tx,
+            shared,
         })
     }
 }
@@ -486,7 +475,7 @@ async fn audio_file_fetch_receive_data(
         let data_size = data.len();
         let _ = file_data_tx.send(ReceivedData::Data(PartialFileData {
             offset: data_offset,
-            data: data,
+            data,
         }));
         data_offset += data_size;
         if request_length < data_size {
@@ -728,14 +717,12 @@ impl AudioFileFetch {
         ));
 
         AudioFileFetch {
-            session: session,
-            shared: shared,
+            session,
+            shared,
             output: Some(output),
-
-            file_data_tx: file_data_tx,
-            file_data_rx: file_data_rx,
-
-            stream_loader_command_rx: stream_loader_command_rx,
+            file_data_tx,
+            file_data_rx,
+            stream_loader_command_rx,
             complete_tx: Some(complete_tx),
             network_response_times_ms: Vec::new(),
         }

audio/src/lewton_decoder.rs

@@ -1,6 +1,7 @@
+use super::{AudioDecoder, AudioError, AudioPacket};
+
 use lewton::inside_ogg::OggStreamReader;
 
-use super::{AudioDecoder, AudioError, AudioPacket};
 use std::error;
 use std::fmt;
 use std::io::{Read, Seek};
@@ -24,16 +25,15 @@ where
     fn seek(&mut self, ms: i64) -> Result<(), AudioError> {
         let absgp = ms * 44100 / 1000;
         match self.0.seek_absgp_pg(absgp as u64) {
-            Ok(_) => return Ok(()),
-            Err(err) => return Err(AudioError::VorbisError(err.into())),
+            Ok(_) => Ok(()),
+            Err(err) => Err(AudioError::VorbisError(err.into())),
         }
     }
 
     fn next_packet(&mut self) -> Result<Option<AudioPacket>, AudioError> {
         use lewton::audio::AudioReadError::AudioIsHeader;
         use lewton::OggReadError::NoCapturePatternFound;
-        use lewton::VorbisError::BadAudio;
-        use lewton::VorbisError::OggError;
+        use lewton::VorbisError::{BadAudio, OggError};
         loop {
             match self.0.read_dec_packet_itl() {
                 Ok(Some(packet)) => return Ok(Some(AudioPacket::Samples(packet))),

audio/src/lib.rs

@@ -1,4 +1,4 @@
-#![allow(clippy::unused_io_amount)]
+#![allow(clippy::unused_io_amount, clippy::too_many_arguments)]
 
 #[macro_use]
 extern crate log;
@@ -85,13 +85,13 @@ impl fmt::Display for AudioError {
 
 impl From<VorbisError> for AudioError {
     fn from(err: VorbisError) -> AudioError {
-        AudioError::VorbisError(VorbisError::from(err))
+        AudioError::VorbisError(err)
     }
 }
 
 impl From<PassthroughError> for AudioError {
     fn from(err: PassthroughError) -> AudioError {
-        AudioError::PassthroughError(PassthroughError::from(err))
+        AudioError::PassthroughError(err)
     }
 }
 

audio/src/passthrough_decoder.rs

@@ -27,7 +27,7 @@ fn write_headers<T: Read + Seek>(
 
     // remove un-needed packets
     rdr.delete_unread_packets();
-    return Ok(stream_serial);
+    Ok(stream_serial)
 }
 
 fn get_header<T>(
@@ -65,7 +65,7 @@ where
     )
     .unwrap();
 
-    return Ok(*stream_serial);
+    Ok(*stream_serial)
 }
 
 pub struct PassthroughDecoder<R: Read + Seek> {
@@ -87,13 +87,13 @@ impl<R: Read + Seek> PassthroughDecoder<R> {
         let stream_serial = write_headers(&mut rdr, &mut wtr)?;
         info!("Starting passthrough track with serial {}", stream_serial);
 
-        return Ok(PassthroughDecoder {
+        Ok(PassthroughDecoder {
             rdr,
             wtr,
             lastgp_page: Some(0),
             absgp_page: 0,
             stream_serial,
-        });
+        })
     }
 }
 
@@ -107,8 +107,8 @@ impl<R: Read + Seek> AudioDecoder for PassthroughDecoder<R> {
 
         // hard-coded to 44.1 kHz
         match self.rdr.seek_absgp(None, (ms * 44100 / 1000) as u64) {
-            Ok(_) => return Ok(()),
-            Err(err) => return Err(AudioError::PassthroughError(err.into())),
+            Ok(_) => Ok(()),
+            Err(err) => Err(AudioError::PassthroughError(err.into())),
         }
     }
 
@@ -164,7 +164,7 @@ impl<R: Read + Seek> AudioDecoder for PassthroughDecoder<R> {
 
             let data = self.wtr.inner_mut();
 
-            if data.len() > 0 {
+            if !data.is_empty() {
                 let result = AudioPacket::OggData(std::mem::take(data));
                 return Ok(Some(result));
             }

audio/src/range_set.rs

@@ -16,14 +16,11 @@ impl fmt::Display for Range {
 
 impl Range {
     pub fn new(start: usize, length: usize) -> Range {
-        return Range {
-            start: start,
-            length: length,
-        };
+        Range { start, length }
     }
 
     pub fn end(&self) -> usize {
-        return self.start + self.length;
+        self.start + self.length
     }
 }
 
@@ -50,7 +47,7 @@ impl RangeSet {
     }
 
     pub fn is_empty(&self) -> bool {
-        return self.ranges.is_empty();
+        self.ranges.is_empty()
     }
 
     pub fn len(&self) -> usize {
@@ -58,11 +55,11 @@ impl RangeSet {
     }
 
     pub fn get_range(&self, index: usize) -> Range {
-        return self.ranges[index].clone();
+        self.ranges[index]
     }
 
     pub fn iter(&self) -> Iter<Range> {
-        return self.ranges.iter();
+        self.ranges.iter()
     }
 
     pub fn contains(&self, value: usize) -> bool {
@@ -73,7 +70,7 @@ impl RangeSet {
                 return true;
             }
         }
-        return false;
+        false
     }
 
     pub fn contained_length_from_value(&self, value: usize) -> usize {
@@ -84,7 +81,7 @@ impl RangeSet {
                 return range.end() - value;
             }
         }
-        return 0;
+        0
     }
 
     #[allow(dead_code)]
@@ -144,7 +141,7 @@ impl RangeSet {
     pub fn union(&self, other: &RangeSet) -> RangeSet {
         let mut result = self.clone();
         result.add_range_set(other);
-        return result;
+        result
     }
 
     pub fn subtract_range(&mut self, range: &Range) {
@@ -204,7 +201,7 @@ impl RangeSet {
     pub fn minus(&self, other: &RangeSet) -> RangeSet {
         let mut result = self.clone();
         result.subtract_range_set(other);
-        return result;
+        result
     }
 
     pub fn intersection(&self, other: &RangeSet) -> RangeSet {
@@ -240,6 +237,6 @@ impl RangeSet {
             }
         }
 
-        return result;
+        result
     }
 }