prettify code

examples/blits.rs

@@ -12,16 +12,16 @@ use std::f64;
 use std::io;
 
 extern crate bwavfile;
-use bwavfile::{WaveWriter, WaveFmt, Error};
+use bwavfile::{Error, WaveFmt, WaveWriter};
 
 #[macro_use]
 extern crate clap;
-use clap::{Arg, App};
+use clap::{App, Arg};
-
 
 fn sine_wave(t: u64, amplitude: i32, wavelength: u32) -> i32 {
     //I did it this way because I'm weird
-    Some(t).map(|i| (i as f64) * 2f64 * f64::consts::PI / wavelength as f64 )
+    Some(t)
+        .map(|i| (i as f64) * 2f64 * f64::consts::PI / wavelength as f64)
         .map(|f| f.sin())
         .map(|s| (s * amplitude as f64) as i32)
         .unwrap()
@@ -39,7 +39,6 @@ fn dbfs_to_signed_int(dbfs: f32, bit_depth: u16) -> i32 {
     ((full_code as f32) * dbfs_to_f32(dbfs)) as i32
 }
 
-
 #[derive(Clone, Copy, PartialEq)]
 enum ToneBurst {
     /// Tone of .0 frequency (hz) for .1 duration (ms) at .2 dBfs
@@ -52,24 +51,21 @@ impl ToneBurst {
     fn duration(&self, sample_rate: u32) -> u64 {
         match self {
             Self::Tone(_, dur, _) => *dur * sample_rate as u64 / 1000,
-            Self::Silence(dur) => *dur * sample_rate as u64 / 1000
+            Self::Silence(dur) => *dur * sample_rate as u64 / 1000,
         }
     }
 }
 
 trait ToneBurstSignal {
-
     fn duration(&self, sample_rate: u32) -> u64;
 
     fn signal(&self, t: u64, sample_rate: u32, bit_depth: u16) -> i32;
 }
 
 impl ToneBurstSignal for Vec<ToneBurst> {
-    
     fn duration(&self, sample_rate: u32) -> u64 {
-        self.iter().fold(0u64, |accum, &item| {
+        self.iter()
-            accum + &item.duration(sample_rate)
+            .fold(0u64, |accum, &item| accum + &item.duration(sample_rate))
-        })
     }
 
     fn signal(&self, t: u64, sample_rate: u32, bit_depth: u16) -> i32 {
@@ -81,22 +77,18 @@ impl ToneBurstSignal for Vec<ToneBurst> {
                 Some((this_time_range, item))
             })
             .find(|(range, _)| range.contains(&t))
-            .map(|(_, item)| {
+            .map(|(_, item)| match item {
-                match item {
                 ToneBurst::Tone(freq, _, dbfs) => {
                     let gain = dbfs_to_signed_int(dbfs, bit_depth);
                     sine_wave(t, gain, (sample_rate as f32 / freq) as u32)
-                    },
-                    ToneBurst::Silence(_) => {
-                        0
                 }
-                }
+                ToneBurst::Silence(_) => 0,
-            }).unwrap_or(0i32)
+            })
+            .unwrap_or(0i32)
     }
 }
 
 fn create_blits_file(file_name: &str, sample_rate: u32, bits_per_sample: u16) -> Result<(), Error> {
-
     // BLITS Tone signal format
     // From EBU Tech 3304 §4 - https://tech.ebu.ch/docs/tech/tech3304.pdf
     let left_channel_sequence: Vec<ToneBurst> = vec![
@@ -104,7 +96,6 @@ fn create_blits_file(file_name: &str, sample_rate : u32, bits_per_sample : u16)
         ToneBurst::Tone(880.0, 600, -18.0),
         ToneBurst::Silence(200),
         ToneBurst::Silence(4000),
-
         // LR ident
         ToneBurst::Tone(1000.0, 1000, -18.0),
         ToneBurst::Silence(300),
@@ -116,10 +107,9 @@ fn create_blits_file(file_name: &str, sample_rate : u32, bits_per_sample : u16)
         ToneBurst::Silence(300),
         ToneBurst::Tone(1000.0, 2000, -18.0),
         ToneBurst::Silence(300),
-
         // Phase check,
         ToneBurst::Tone(2000.0, 3000, -24.0),
-        ToneBurst::Silence(200)
+        ToneBurst::Silence(200),
     ];
 
     let right_channel_sequence: Vec<ToneBurst> = vec![
@@ -128,14 +118,12 @@ fn create_blits_file(file_name: &str, sample_rate : u32, bits_per_sample : u16)
         ToneBurst::Tone(880.0, 600, -18.0),
         ToneBurst::Silence(200),
         ToneBurst::Silence(3200),
-
         // LR ident
         ToneBurst::Tone(1000.0, 5100, -18.0),
         ToneBurst::Silence(300),
-
         // Phase check,
         ToneBurst::Tone(2000.0, 3000, -24.0),
-        ToneBurst::Silence(200)
+        ToneBurst::Silence(200),
     ];
 
     let center_channel_sequence: Vec<ToneBurst> = vec![
@@ -144,13 +132,11 @@ fn create_blits_file(file_name: &str, sample_rate : u32, bits_per_sample : u16)
         ToneBurst::Tone(1320.0, 600, -18.0),
         ToneBurst::Silence(200),
         ToneBurst::Silence(2400),
-
         // LR ident
         ToneBurst::Silence(5400),
-
         // Phase check,
         ToneBurst::Tone(2000.0, 3000, -24.0),
-        ToneBurst::Silence(200)
+        ToneBurst::Silence(200),
     ];
 
     let lfe_channel_sequence: Vec<ToneBurst> = vec![
@@ -159,13 +145,11 @@ fn create_blits_file(file_name: &str, sample_rate : u32, bits_per_sample : u16)
         ToneBurst::Tone(82.5, 600, -18.0),
         ToneBurst::Silence(200),
         ToneBurst::Silence(1600),
-
         // LR ident
         ToneBurst::Silence(5400),
-
         // Phase check,
         ToneBurst::Tone(2000.0, 3000, -24.0),
-        ToneBurst::Silence(200)
+        ToneBurst::Silence(200),
     ];
 
     let ls_channel_sequence: Vec<ToneBurst> = vec![
@@ -174,13 +158,11 @@ fn create_blits_file(file_name: &str, sample_rate : u32, bits_per_sample : u16)
         ToneBurst::Tone(660.0, 600, -18.0),
         ToneBurst::Silence(200),
         ToneBurst::Silence(800),
-
         // LR ident
         ToneBurst::Silence(5400),
-
         // Phase check,
         ToneBurst::Tone(2000.0, 3000, -24.0),
-        ToneBurst::Silence(200)
+        ToneBurst::Silence(200),
     ];
 
     let rs_channel_sequence: Vec<ToneBurst> = vec![
@@ -188,28 +170,35 @@ fn create_blits_file(file_name: &str, sample_rate : u32, bits_per_sample : u16)
         ToneBurst::Silence(4000),
         ToneBurst::Tone(660.0, 600, -18.0),
         ToneBurst::Silence(200),
-
         // LR ident
         ToneBurst::Silence(5400),
-
         // Phase check,
         ToneBurst::Tone(2000.0, 3000, -24.0),
-        ToneBurst::Silence(200)
+        ToneBurst::Silence(200),
     ];
 
-    let length = [&left_channel_sequence, &right_channel_sequence, 
+    let length = [
-        &center_channel_sequence, &lfe_channel_sequence, 
+        &left_channel_sequence,
-        &ls_channel_sequence, &rs_channel_sequence].iter()
+        &right_channel_sequence,
+        &center_channel_sequence,
+        &lfe_channel_sequence,
+        &ls_channel_sequence,
+        &rs_channel_sequence,
+    ]
+    .iter()
     .map(|i| i.duration(sample_rate))
-            .max().unwrap_or(0);
+    .max()
+    .unwrap_or(0);
 
     let frames = (0..=length).map(|frame| {
-        (left_channel_sequence.signal(frame, sample_rate, bits_per_sample),
+        (
+            left_channel_sequence.signal(frame, sample_rate, bits_per_sample),
             right_channel_sequence.signal(frame, sample_rate, bits_per_sample),
             center_channel_sequence.signal(frame, sample_rate, bits_per_sample),
             lfe_channel_sequence.signal(frame, sample_rate, bits_per_sample),
             ls_channel_sequence.signal(frame, sample_rate, bits_per_sample),
-        rs_channel_sequence.signal(frame, sample_rate, bits_per_sample))
+            rs_channel_sequence.signal(frame, sample_rate, bits_per_sample),
+        )
     });
 
     let format = WaveFmt::new_pcm_multichannel(sample_rate, bits_per_sample, 0b111111);
@@ -227,33 +216,41 @@ fn create_blits_file(file_name: &str, sample_rate : u32, bits_per_sample : u16)
 }
 
 fn main() -> io::Result<()> {
-
     let matches = App::new("blits")
         .version(crate_version!())
         .author(crate_authors!())
         .about("Generate a BLITS 5.1 alignment tone.")
-    .arg(Arg::with_name("sample_rate")
+        .arg(
+            Arg::with_name("sample_rate")
                 .long("sample-rate")
                 .short("s")
                 .help("Sample rate of output")
-        .default_value("48000")
+                .default_value("48000"),
         )
-    .arg(Arg::with_name("bit_depth")
+        .arg(
+            Arg::with_name("bit_depth")
                 .long("bit-depth")
                 .short("b")
                 .help("Bit depth of output")
-        .default_value("24")
+                .default_value("24"),
         )
-    .arg(Arg::with_name("OUTPUT")
+        .arg(
+            Arg::with_name("OUTPUT")
                 .help("Output wave file")
-        .default_value("blits.wav")
+                .default_value("blits.wav"),
         )
         .get_matches();
 
-    let sample_rate = matches.value_of("sample_rate").unwrap().parse::<u32>()
+    let sample_rate = matches
+        .value_of("sample_rate")
+        .unwrap()
+        .parse::<u32>()
         .expect("Failed to read sample rate");
 
-    let bits_per_sample = matches.value_of("bit_depth").unwrap().parse::<u16>()
+    let bits_per_sample = matches
+        .value_of("bit_depth")
+        .unwrap()
+        .parse::<u16>()
         .expect("Failed to read bit depth");
 
     let filename = matches.value_of("OUTPUT").unwrap();
@@ -261,6 +258,6 @@ fn main() -> io::Result<()> {
     match create_blits_file(&filename, sample_rate, bits_per_sample) {
         Err(Error::IOError(x)) => panic!("IO Error: {:?}", x),
         Err(err) => panic!("Error: {:?}", err),
-        Ok(()) => Ok(())
+        Ok(()) => Ok(()),
     }
 }

examples/wave-deinter.rs

@@ -8,13 +8,18 @@ use std::io;
 use std::path::Path;
 
 extern crate bwavfile;
-use bwavfile::{Error,WaveReader, WaveWriter, ChannelDescriptor, ChannelMask, WaveFmt};
+use bwavfile::{ChannelDescriptor, ChannelMask, Error, WaveFmt, WaveReader, WaveWriter};
 
 #[macro_use]
 extern crate clap;
-use clap::{Arg, App};
+use clap::{App, Arg};
 
-fn name_suffix(force_numeric : bool, delim : &str, index: usize, channel_descriptor : &ChannelDescriptor) -> String {
+fn name_suffix(
+    force_numeric: bool,
+    delim: &str,
+    index: usize,
+    channel_descriptor: &ChannelDescriptor,
+) -> String {
     if force_numeric || channel_descriptor.speaker == ChannelMask::DirectOut {
         format!("{}A{:02}", delim, index)
     } else {
@@ -37,7 +42,7 @@ fn name_suffix(force_numeric : bool, delim : &str, index: usize, channel_descrip
             ChannelMask::TopBackLeft => "Ltb",
             ChannelMask::TopBackCenter => "Ctb",
             ChannelMask::TopBackRight => "Rtb",
-            ChannelMask::DirectOut => panic!("Error, can't get here")
+            ChannelMask::DirectOut => panic!("Error, can't get here"),
         };
         format!("{}{}", delim, chan_name)
     }
@@ -54,20 +59,31 @@ fn process_file(infile: &str, delim : &str, numeric_channel_names : bool) -> Res
     }
 
     let infile_path = Path::new(infile);
-    let basename = infile_path.file_stem().expect("Unable to extract file basename").to_str().unwrap();
+    let basename = infile_path
-    let output_dir = infile_path.parent().expect("Unable to derive parent directory");
+        .file_stem()
+        .expect("Unable to extract file basename")
+        .to_str()
+        .unwrap();
+    let output_dir = infile_path
+        .parent()
+        .expect("Unable to derive parent directory");
 
-    let ouptut_format = WaveFmt::new_pcm_mono(input_format.sample_rate, input_format.bits_per_sample);
+    let ouptut_format =
+        WaveFmt::new_pcm_mono(input_format.sample_rate, input_format.bits_per_sample);
     let mut input_wave_reader = input_file.audio_frame_reader()?;
 
     for (n, channel) in channel_desc.iter().enumerate() {
         let suffix = name_suffix(numeric_channel_names, delim, n + 1, channel);
-        let outfile_name = output_dir.join(format!("{}{}.wav", basename, suffix))
+        let outfile_name = output_dir
-            .into_os_string().into_string().unwrap();
+            .join(format!("{}{}.wav", basename, suffix))
+            .into_os_string()
+            .into_string()
+            .unwrap();
 
         println!("Will create file {}", outfile_name);
 
-        let output_file = WaveWriter::create(&outfile_name, ouptut_format).expect("Failed to create new file");
+        let output_file =
+            WaveWriter::create(&outfile_name, ouptut_format).expect("Failed to create new file");
 
         let mut output_wave_writer = output_file.audio_frame_writer()?;
         let mut buffer = input_format.create_frame_buffer(1);
@@ -88,22 +104,25 @@ fn main() -> io::Result<()> {
         .version(crate_version!())
         .author(crate_authors!())
         .about("Extract each channel of a polyphonic wave file as a new monoaural wave file.")
-        .arg(Arg::with_name("numeric_names")
+        .arg(
+            Arg::with_name("numeric_names")
                 .long("numeric")
                 .short("n")
                 .help("Use numeric channel names \"01\" \"02\" etc.")
-            .takes_value(false)
+                .takes_value(false),
         )
-        .arg(Arg::with_name("channel_delimiter")
+        .arg(
+            Arg::with_name("channel_delimiter")
                 .long("delim")
                 .short("d")
                 .help("Channel label delimiter.")
-            .default_value(".")
+                .default_value("."),
         )
-        .arg(Arg::with_name("INPUT")
+        .arg(
+            Arg::with_name("INPUT")
                 .help("Input wave file")
                 .required(true)
-            .multiple(true)
+                .multiple(true),
         )
         .get_matches();
 
@@ -114,6 +133,6 @@ fn main() -> io::Result<()> {
     match process_file(infile, delimiter, use_numeric_names) {
         Err(Error::IOError(io)) => Err(io),
         Err(e) => panic!("Error: {:?}", e),
-        Ok(()) => Ok(())
+        Ok(()) => Ok(()),
     }
 }

examples/wave-inter.rs

@@ -10,7 +10,7 @@ extern crate bwavfile;
 
 #[macro_use]
 extern crate clap;
-use clap::{Arg, App};
+use clap::{App, Arg};
 
 fn main() -> io::Result<()> {
     let matches = App::new("wave-inter")

src/bext.rs

@@ -1,9 +1,7 @@
-
 pub type LU = f32;
 pub type LUFS = f32;
 pub type Decibels = f32;
 
-
 ///  Broadcast-WAV metadata record.
 ///
 ///  The `bext` record contains information about the original recording of the
@@ -26,7 +24,6 @@ pub type Decibels = f32;
 
 #[derive(Debug)]
 pub struct Bext {
-
     /// 256 ASCII character field with free text.
     pub description: String,
 
@@ -82,7 +79,6 @@ pub struct Bext {
     /// This field is `None` if the version is less than 2.
     pub max_short_term_loudness: Option<LUFS>,
     // 180 bytes of nothing
-
     /// Coding History.
-    pub coding_history: String
+    pub coding_history: String,
 }

src/chunks.rs

@@ -1,17 +1,17 @@
 use std::io::{Read, Write};
 
-use encoding::{DecoderTrap, EncoderTrap};
-use encoding::{Encoding};
 use encoding::all::ASCII;
+use encoding::Encoding;
+use encoding::{DecoderTrap, EncoderTrap};
 
 use byteorder::LittleEndian;
 use byteorder::{ReadBytesExt, WriteBytesExt};
 
 use uuid::Uuid;
 
+use super::bext::Bext;
 use super::errors::Error as ParserError;
 use super::fmt::{WaveFmt, WaveFmtExtended};
-use super::bext::Bext;
 
 pub trait ReadBWaveChunks: Read {
     fn read_bext(&mut self) -> Result<Bext, ParserError>;
@@ -21,11 +21,18 @@ pub trait ReadBWaveChunks: Read {
 
 pub trait WriteBWaveChunks: Write {
     fn write_wave_fmt(&mut self, format: &WaveFmt) -> Result<(), ParserError>;
-    fn write_bext_string_field(&mut self, string: &String, length: usize) -> Result<(),ParserError>;
+    fn write_bext_string_field(
+        &mut self,
+        string: &String,
+        length: usize,
+    ) -> Result<(), ParserError>;
     fn write_bext(&mut self, bext: &Bext) -> Result<(), ParserError>;
 }
 
-impl<T> WriteBWaveChunks for T where T: Write {
+impl<T> WriteBWaveChunks for T
+where
+    T: Write,
+{
     fn write_wave_fmt(&mut self, format: &WaveFmt) -> Result<(), ParserError> {
         self.write_u16::<LittleEndian>(format.tag as u16)?;
         self.write_u16::<LittleEndian>(format.channel_count)?;
@@ -44,8 +51,14 @@ impl<T> WriteBWaveChunks for T where T: Write {
         Ok(())
     }
 
-    fn write_bext_string_field(&mut self, string: &String, length: usize) -> Result<(),ParserError> {
+    fn write_bext_string_field(
-        let mut buf = ASCII.encode(&string, EncoderTrap::Ignore).expect("Error encoding text");
+        &mut self,
+        string: &String,
+        length: usize,
+    ) -> Result<(), ParserError> {
+        let mut buf = ASCII
+            .encode(&string, EncoderTrap::Ignore)
+            .expect("Error encoding text");
         buf.truncate(length);
         let filler_length = length - buf.len();
         if filler_length > 0 {
@@ -69,21 +82,21 @@ impl<T> WriteBWaveChunks for T where T: Write {
         let buf = bext.umid.unwrap_or([0u8; 64]);
         self.write_all(&buf)?;
 
+        self.write_i16::<LittleEndian>((bext.loudness_value.unwrap_or(0.0) * 100.0) as i16)?;
+        self.write_i16::<LittleEndian>((bext.loudness_range.unwrap_or(0.0) * 100.0) as i16)?;
+        self.write_i16::<LittleEndian>((bext.max_true_peak_level.unwrap_or(0.0) * 100.0) as i16)?;
         self.write_i16::<LittleEndian>(
-            (bext.loudness_value.unwrap_or(0.0) * 100.0) as i16 )?;
+            (bext.max_momentary_loudness.unwrap_or(0.0) * 100.0) as i16,
+        )?;
         self.write_i16::<LittleEndian>(
-            (bext.loudness_range.unwrap_or(0.0) * 100.0) as i16 )?;
+            (bext.max_short_term_loudness.unwrap_or(0.0) * 100.0) as i16,
-        self.write_i16::<LittleEndian>( 
+        )?;
-            (bext.max_true_peak_level.unwrap_or(0.0) * 100.0) as i16 )?;
-        self.write_i16::<LittleEndian>( 
-            (bext.max_momentary_loudness.unwrap_or(0.0) * 100.0) as i16 )?;
-        self.write_i16::<LittleEndian>( 
-            (bext.max_short_term_loudness.unwrap_or(0.0) * 100.0) as i16 )?;
 
         let padding = [0u8; 180];
         self.write_all(&padding)?;
 
-        let coding = ASCII.encode(&bext.coding_history, EncoderTrap::Ignore)
+        let coding = ASCII
+            .encode(&bext.coding_history, EncoderTrap::Ignore)
             .expect("Error");
 
         self.write_all(&coding)?;
@@ -91,8 +104,10 @@ impl<T> WriteBWaveChunks for T where T: Write {
     }
 }
 
-impl<T> ReadBWaveChunks for T where T: Read {
+impl<T> ReadBWaveChunks for T
-
+where
+    T: Read,
+{
     fn read_wave_fmt(&mut self) -> Result<WaveFmt, ParserError> {
         let tag_value: u16;
         Ok(WaveFmt {
@@ -116,20 +131,26 @@ impl<T> ReadBWaveChunks for T where T: Read {
                             let mut buf: [u8; 16] = [0; 16];
                             self.read_exact(&mut buf)?;
                             Uuid::from_slice(&buf)?
-                        }
+                        },
                     })
                 } else {
                     None
                 }
-            }
+            },
         })
     }
 
     fn read_bext_string_field(&mut self, length: usize) -> Result<String, ParserError> {
         let mut buffer: Vec<u8> = vec![0; length];
         self.read(&mut buffer)?;
-        let trimmed : Vec<u8> = buffer.iter().take_while(|c| **c != 0 as u8).cloned().collect();
+        let trimmed: Vec<u8> = buffer
-        Ok(ASCII.decode(&trimmed, DecoderTrap::Ignore).expect("Error decoding text")) 
+            .iter()
+            .take_while(|c| **c != 0 as u8)
+            .cloned()
+            .collect();
+        Ok(ASCII
+            .decode(&trimmed, DecoderTrap::Ignore)
+            .expect("Error decoding text"))
     }
 
     fn read_bext(&mut self) -> Result<Bext, ParserError> {
@@ -148,42 +169,70 @@ impl<T> ReadBWaveChunks for T where T: Read {
             umid: {
                 let mut buf = [0u8; 64];
                 self.read(&mut buf)?;
-                    if version > 0 { Some(buf) } else { None }
+                if version > 0 {
+                    Some(buf)
+                } else {
+                    None
+                }
             },
             loudness_value: {
                 let val = (self.read_i16::<LittleEndian>()? as f32) / 100f32;
-                    if version > 1 { Some(val) } else { None }
+                if version > 1 {
+                    Some(val)
+                } else {
+                    None
+                }
             },
             loudness_range: {
                 let val = self.read_i16::<LittleEndian>()? as f32 / 100f32;
-                    if version > 1 { Some(val) } else { None }
+                if version > 1 {
+                    Some(val)
+                } else {
+                    None
+                }
             },
             max_true_peak_level: {
                 let val = self.read_i16::<LittleEndian>()? as f32 / 100f32;
-                    if version > 1 { Some(val) } else { None }
+                if version > 1 {
+                    Some(val)
+                } else {
+                    None
+                }
             },
             max_momentary_loudness: {
                 let val = self.read_i16::<LittleEndian>()? as f32 / 100f32;
-                    if version > 1 { Some(val) } else { None }
+                if version > 1 {
+                    Some(val)
+                } else {
+                    None
+                }
             },
             max_short_term_loudness: {
                 let val = self.read_i16::<LittleEndian>()? as f32 / 100f32;
-                    if version > 1 { Some(val) } else { None }
+                if version > 1 {
+                    Some(val)
+                } else {
+                    None
+                }
             },
             coding_history: {
-                    for _ in 0..180 { self.read_u8()?; }
+                for _ in 0..180 {
+                    self.read_u8()?;
+                }
                 let mut buf = vec![];
                 self.read_to_end(&mut buf)?;
-                    ASCII.decode(&buf, DecoderTrap::Ignore).expect("Error decoding text")
+                ASCII
-                }
+                    .decode(&buf, DecoderTrap::Ignore)
+                    .expect("Error decoding text")
+            },
         })
     }
 }
 
 #[test]
 fn test_read_51_wav() {
-    use super::fmt::ChannelMask;
     use super::common_format::CommonFormat;
+    use super::fmt::ChannelMask;
 
     let path = "tests/media/pt_24bit_51.wav";
 
@@ -198,9 +247,17 @@ fn test_read_51_wav() {
 
     let channels = ChannelMask::channels(extended.channel_mask, format.channel_count);
 
-    assert_eq!(channels, [ChannelMask::FrontLeft, ChannelMask::FrontRight, 
+    assert_eq!(
-        ChannelMask::FrontCenter, ChannelMask::LowFrequency,
+        channels,
-        ChannelMask::BackLeft, ChannelMask::BackRight]);
+        [
+            ChannelMask::FrontLeft,
+            ChannelMask::FrontRight,
+            ChannelMask::FrontCenter,
+            ChannelMask::LowFrequency,
+            ChannelMask::BackLeft,
+            ChannelMask::BackRight
+        ]
+    );
 
     assert_eq!(format.common_format(), CommonFormat::IntegerPCM);
 }

src/common_format.rs

@@ -15,21 +15,25 @@ const BASIC_EXTENDED: u16   = 0xFFFE;
 
 */
 
-pub const UUID_PCM: Uuid =           Uuid::from_bytes([0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x00, 
+pub const UUID_PCM: Uuid = Uuid::from_bytes([
-    0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71]);
+    0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x00, 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71,
+]);
 
-pub const UUID_FLOAT: Uuid =         Uuid::from_bytes([0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x00,
+pub const UUID_FLOAT: Uuid = Uuid::from_bytes([
-    0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71]);
+    0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x00, 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71,
+]);
 
-pub const UUID_MPEG: Uuid =          Uuid::from_bytes([0x50, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x00,
+pub const UUID_MPEG: Uuid = Uuid::from_bytes([
-    0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71]);
+    0x50, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x00, 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71,
+]);
 
-pub const UUID_BFORMAT_PCM: Uuid =   Uuid::from_bytes([0x01, 0x00, 0x00, 0x00, 0x21, 0x07, 0xd3, 0x11, 
+pub const UUID_BFORMAT_PCM: Uuid = Uuid::from_bytes([
-    0x86, 0x44, 0xc8, 0xc1, 0xca, 0x00, 0x00, 0x00]);
+    0x01, 0x00, 0x00, 0x00, 0x21, 0x07, 0xd3, 0x11, 0x86, 0x44, 0xc8, 0xc1, 0xca, 0x00, 0x00, 0x00,
-
+]);
-pub const UUID_BFORMAT_FLOAT: Uuid = Uuid::from_bytes([0x03, 0x00, 0x00, 0x00, 0x21, 0x07, 0xd3, 0x11,
-    0x86, 0x44, 0xc8, 0xc1, 0xca, 0x00, 0x00, 0x00]);
 
+pub const UUID_BFORMAT_FLOAT: Uuid = Uuid::from_bytes([
+    0x03, 0x00, 0x00, 0x00, 0x21, 0x07, 0xd3, 0x11, 0x86, 0x44, 0xc8, 0xc1, 0xca, 0x00, 0x00, 0x00,
+]);
 
 fn uuid_from_basic_tag(tag: u16) -> Uuid {
     let tail: [u8; 6] = [0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71];
@@ -75,7 +79,7 @@ impl CommonFormat {
             (BASIC_EXTENDED, Some(UUID_BFORMAT_PCM)) => Self::AmbisonicBFormatIntegerPCM,
             (BASIC_EXTENDED, Some(UUID_BFORMAT_FLOAT)) => Self::AmbisonicBFormatIeeeFloatPCM,
             (BASIC_EXTENDED, Some(x)) => CommonFormat::UnknownExtended(x),
-            (x, _) => CommonFormat::UnknownBasic(x)
+            (x, _) => CommonFormat::UnknownBasic(x),
         }
     }
 
@@ -91,7 +95,7 @@ impl CommonFormat {
             Self::AmbisonicBFormatIntegerPCM => (BASIC_EXTENDED, UUID_BFORMAT_PCM),
             Self::AmbisonicBFormatIeeeFloatPCM => (BASIC_EXTENDED, UUID_BFORMAT_FLOAT),
             Self::UnknownBasic(x) => (x, uuid_from_basic_tag(x)),
-            Self::UnknownExtended(x) => ( BASIC_EXTENDED, x)
+            Self::UnknownExtended(x) => (BASIC_EXTENDED, x),
         }
     }
 }

src/cue.rs

@@ -1,12 +1,13 @@
-use super::fourcc::{FourCC,ReadFourCC, WriteFourCC, LABL_SIG, NOTE_SIG, 
+use super::fourcc::{
-    ADTL_SIG, LTXT_SIG, DATA_SIG};
+    FourCC, ReadFourCC, WriteFourCC, ADTL_SIG, DATA_SIG, LABL_SIG, LTXT_SIG, NOTE_SIG,
+};
 use super::list_form::collect_list_form;
 
-use byteorder::{WriteBytesExt, ReadBytesExt, LittleEndian};
+use byteorder::{LittleEndian, ReadBytesExt, WriteBytesExt};
 
-use encoding::{DecoderTrap,EncoderTrap};
-use encoding::{Encoding};
 use encoding::all::ASCII;
+use encoding::Encoding;
+use encoding::{DecoderTrap, EncoderTrap};
 
 use std::io::{Cursor, Error, Read, Write};
 
@@ -17,11 +18,10 @@ struct RawCue {
     chunk_id: FourCC,
     chunk_start: u32,
     block_start: u32,
-    frame_offset : u32
+    frame_offset: u32,
 }
 
 impl RawCue {
-
     fn write_to(cues: Vec<Self>) -> Vec<u8> {
         let mut writer = Cursor::new(vec![0u8; 0]);
 
@@ -50,7 +50,7 @@ impl RawCue {
                 chunk_id: rdr.read_fourcc()?,
                 chunk_start: rdr.read_u32::<LittleEndian>()?,
                 block_start: rdr.read_u32::<LittleEndian>()?,
-                frame_offset : rdr.read_u32::<LittleEndian>()?
+                frame_offset: rdr.read_u32::<LittleEndian>()?,
             })
         }
 
@@ -61,14 +61,15 @@ impl RawCue {
 #[derive(Clone, Debug)]
 struct RawLabel {
     cue_point_id: u32,
-    text : Vec<u8>
+    text: Vec<u8>,
 }
 
 impl RawLabel {
-
     fn write_to(&self) -> Vec<u8> {
         let mut writer = Cursor::new(vec![0u8; 0]);
-        writer.write_u32::<LittleEndian>(self.cue_point_id as u32).unwrap();
+        writer
+            .write_u32::<LittleEndian>(self.cue_point_id as u32)
+            .unwrap();
         writer.write(&self.text).unwrap();
         writer.into_inner()
     }
@@ -83,7 +84,7 @@ impl RawLabel {
                 let mut buf = vec![0u8; (length - 4) as usize];
                 rdr.read_exact(&mut buf)?;
                 buf
-            }
+            },
         })
     }
 }
@@ -91,11 +92,10 @@ impl RawLabel {
 #[derive(Clone, Debug)]
 struct RawNote {
     cue_point_id: u32,
-    text : Vec<u8>
+    text: Vec<u8>,
 }
 
 impl RawNote {
-
     fn write_to(&self) -> Vec<u8> {
         let mut writer = Cursor::new(vec![0u8; 0]);
         writer.write_u32::<LittleEndian>(self.cue_point_id).unwrap();
@@ -113,7 +113,7 @@ impl RawNote {
                 let mut buf = vec![0u8; (length - 4) as usize];
                 rdr.read_exact(&mut buf)?;
                 buf
-            }
+            },
         })
     }
 }
@@ -127,11 +127,10 @@ struct RawLtxt {
     language: u16,
     dialect: u16,
     code_page: u16,
-    text: Option<Vec<u8>>
+    text: Option<Vec<u8>>,
 }
 
 impl RawLtxt {
-
     fn write_to(&self) -> Vec<u8> {
         let mut writer = Cursor::new(vec![0u8; 0]);
         writer.write_u32::<LittleEndian>(self.cue_point_id).unwrap();
@@ -167,7 +166,7 @@ impl RawLtxt {
                 } else {
                     None
                 }
-            }
+            },
         })
     }
 }
@@ -177,7 +176,7 @@ enum RawAdtlMember {
     Label(RawLabel),
     Note(RawNote),
     LabeledText(RawLtxt),
-    Unrecognized(FourCC)
+    Unrecognized(FourCC),
 }
 
 impl RawAdtlMember {
@@ -189,18 +188,22 @@ impl RawAdtlMember {
                 RawAdtlMember::Label(l) => ((LABL_SIG, l.write_to())),
                 RawAdtlMember::Note(n) => ((NOTE_SIG, n.write_to())),
                 RawAdtlMember::LabeledText(t) => ((LTXT_SIG, t.write_to())),
-                RawAdtlMember::Unrecognized(f) => (*f, vec![0u8;0] ) // <-- this is a dopey case but here for completeness
+                RawAdtlMember::Unrecognized(f) => (*f, vec![0u8; 0]), // <-- this is a dopey case but here for completeness
             };
             w.write_fourcc(fcc).unwrap();
             w.write_u32::<LittleEndian>(buf.len() as u32).unwrap();
             w.write(&buf).unwrap();
-            if buf.len() % 2 == 1 { w.write_u8(0).unwrap(); }
+            if buf.len() % 2 == 1 {
+                w.write_u8(0).unwrap();
+            }
         }
 
         let chunk_content = w.into_inner();
         let mut writer = Cursor::new(vec![0u8; 0]);
         writer.write_fourcc(ADTL_SIG).unwrap();
-        writer.write_u32::<LittleEndian>(chunk_content.len() as u32).unwrap();
+        writer
+            .write_u32::<LittleEndian>(chunk_content.len() as u32)
+            .unwrap();
         writer.write(&chunk_content).unwrap();
         writer.into_inner()
     }
@@ -210,14 +213,12 @@ impl RawAdtlMember {
         let mut retval: Vec<RawAdtlMember> = vec![];
 
         for chunk in chunks.iter() {
-            retval.push( 
+            retval.push(match chunk.signature {
-                match chunk.signature {
                 LABL_SIG => RawAdtlMember::Label(RawLabel::read_from(&chunk.contents)?),
                 NOTE_SIG => RawAdtlMember::Note(RawNote::read_from(&chunk.contents)?),
                 LTXT_SIG => RawAdtlMember::LabeledText(RawLtxt::read_from(&chunk.contents)?),
-                    x => RawAdtlMember::Unrecognized(x)
+                x => RawAdtlMember::Unrecognized(x),
-                }
+            })
-            )
         }
         Ok(retval)
     }
@@ -230,33 +231,29 @@ trait AdtlMemberSearch {
 }
 
 impl AdtlMemberSearch for Vec<RawAdtlMember> {
-
     fn labels_for_cue_point(&self, id: u32) -> Vec<&RawLabel> {
-        self.iter().filter_map(|item| {
+        self.iter()
-            match item {
+            .filter_map(|item| match item {
                 RawAdtlMember::Label(x) if x.cue_point_id == id => Some(x),
-                _ => None
+                _ => None,
-            }
             })
             .collect()
     }
 
     fn notes_for_cue_point(&self, id: u32) -> Vec<&RawNote> {
-        self.iter().filter_map(|item| {
+        self.iter()
-            match item {
+            .filter_map(|item| match item {
                 RawAdtlMember::Note(x) if x.cue_point_id == id => Some(x),
-                _ => None
+                _ => None,
-            }
             })
             .collect()
     }
 
     fn ltxt_for_cue_point(&self, id: u32) -> Vec<&RawLtxt> {
-        self.iter().filter_map(|item| {
+        self.iter()
-            match item {
+            .filter_map(|item| match item {
                 RawAdtlMember::LabeledText(x) if x.cue_point_id == id => Some(x),
-                _ => None
+                _ => None,
-            }
             })
             .collect()
     }
@@ -270,7 +267,6 @@ impl AdtlMemberSearch for Vec<RawAdtlMember> {
 /// ### Not Implemented
 /// - [EBU 3285 Supplement 2](https://tech.ebu.ch/docs/tech/tech3285s2.pdf) (July 2001): Quality chunk and cuesheet
 pub struct Cue {
-
     /// The time of this marker
     pub frame: u32,
 
@@ -290,24 +286,31 @@ pub struct Cue {
     /// marker position to *both* fields, while a Sound Devices
     /// recorder writes the marker position to *only* the `offset`
     /// field.
-    pub offset : u32
+    pub offset: u32,
 }
 
-
 fn convert_to_cue_string(buffer: &[u8]) -> String {
-    let trimmed : Vec<u8> = buffer.iter().take_while(|c| **c != 0 as u8).cloned().collect();
+    let trimmed: Vec<u8> = buffer
-    ASCII.decode(&trimmed, DecoderTrap::Ignore).expect("Error decoding text")
+        .iter()
+        .take_while(|c| **c != 0 as u8)
+        .cloned()
+        .collect();
+    ASCII
+        .decode(&trimmed, DecoderTrap::Ignore)
+        .expect("Error decoding text")
 }
 
 fn convert_from_cue_string(val: &str) -> Vec<u8> {
-    ASCII.encode(&val, EncoderTrap::Ignore).expect("Error encoding text")
+    ASCII
+        .encode(&val, EncoderTrap::Ignore)
+        .expect("Error encoding text")
 }
 
 impl Cue {
-
     /// Take a list of `Cue`s and convert it into `RawCue` and `RawAdtlMember`s
     fn compile_to(cues: &[Cue]) -> (Vec<RawCue>, Vec<RawAdtlMember>) {
-        cues.iter().enumerate()
+        cues.iter()
+            .enumerate()
             .map(|(n, cue)| {
                 let raw_cue = RawCue {
                     cue_point_id: n as u32,
@@ -315,25 +318,20 @@ impl Cue {
                     chunk_id: DATA_SIG,
                     chunk_start: 0,
                     block_start: 0,
-                    frame_offset: cue.offset
+                    frame_offset: cue.offset,
                 };
 
-                let raw_label = cue.label.as_ref().map(|val| {
+                let raw_label = cue.label.as_ref().map(|val| RawLabel {
-                    RawLabel {
                     cue_point_id: n as u32,
-                        text: convert_from_cue_string(&val)
+                    text: convert_from_cue_string(&val),
-                    }
                 });
 
-                let raw_note = cue.note.as_ref().map(|val| {
+                let raw_note = cue.note.as_ref().map(|val| RawNote {
-                    RawNote { 
                     cue_point_id: n as u32,
-                        text : convert_from_cue_string(&val)
+                    text: convert_from_cue_string(&val),
-                    }
                 });
 
-                let raw_ltxt = cue.length.map(|val| {
+                let raw_ltxt = cue.length.map(|val| RawLtxt {
-                    RawLtxt {
                     cue_point_id: n as u32,
                     frame_length: val,
                     purpose: FourCC::make(b"rgn "),
@@ -341,20 +339,21 @@ impl Cue {
                     language: 0,
                     dialect: 0,
                     code_page: 0,
-                        text : None
+                    text: None,
-                    }
                 });
 
                 (raw_cue, raw_label, raw_note, raw_ltxt)
             })
-            .fold((Vec::<RawCue>::new(), Vec::<RawAdtlMember>::new()),
+            .fold(
+                (Vec::<RawCue>::new(), Vec::<RawAdtlMember>::new()),
                 |(mut cues, mut adtls), (cue, label, note, ltxt)| {
                     cues.push(cue);
                     label.map(|l| adtls.push(RawAdtlMember::Label(l)));
                     note.map(|n| adtls.push(RawAdtlMember::Note(n)));
                     ltxt.map(|m| adtls.push(RawAdtlMember::LabeledText(m)));
                     (cues, adtls)
-            })
+                },
+            )
     }
 
     pub fn collect_from(cue_chunk: &[u8], adtl_chunk: Option<&[u8]>) -> Result<Vec<Cue>, Error> {
@@ -367,33 +366,37 @@ impl Cue {
             raw_adtl = vec![];
         }
 
-
+        Ok(raw_cues
-        Ok( 
+            .iter()
-            raw_cues.iter()
             .map(|i| {
                 Cue {
                     //ident : i.cue_point_id,
                     frame: i.frame,
                     length: {
-                        raw_adtl.ltxt_for_cue_point(i.cue_point_id).first()
+                        raw_adtl
+                            .ltxt_for_cue_point(i.cue_point_id)
+                            .first()
                             .filter(|x| x.purpose == FourCC::make(b"rgn "))
                             .map(|x| x.frame_length)
                     },
                     label: {
-                        raw_adtl.labels_for_cue_point(i.cue_point_id).iter()
+                        raw_adtl
+                            .labels_for_cue_point(i.cue_point_id)
+                            .iter()
                             .map(|s| convert_to_cue_string(&s.text))
                             .next()
                     },
                     note: {
-                        raw_adtl.notes_for_cue_point(i.cue_point_id).iter()
+                        raw_adtl
+                            .notes_for_cue_point(i.cue_point_id)
+                            .iter()
                             //.filter_map(|x| str::from_utf8(&x.text).ok())
                             .map(|s| convert_to_cue_string(&s.text))
                             .next()
                     },
-                    offset: i.frame_offset
+                    offset: i.frame_offset,
                 }
-            }).collect() 
+            })
-        )
+            .collect())
     }
-
 }

src/errors.rs

@@ -1,13 +1,15 @@
-use std::{fmt::{Debug,Display}, io};
-use std::error::Error as StdError;
 use super::fourcc::FourCC;
+use std::error::Error as StdError;
+use std::{
+    fmt::{Debug, Display},
+    io,
+};
 
 use uuid;
 
 /// Errors returned by methods in this crate.
 #[derive(Debug)]
 pub enum Error {
-
     /// An `io::Error` occurred
     IOError(io::Error),
 
@@ -41,7 +43,6 @@ pub enum Error {
 
     /// The file is not optimized for writing new data
     DataChunkNotPreparedForAppend,
-
 }
 
 impl StdError for Error {}
@@ -52,7 +53,6 @@ impl Display for Error {
     }
 }
 
-
 impl From<io::Error> for Error {
     fn from(error: io::Error) -> Error {
         Error::IOError(error)

src/fmt.rs

@@ -1,9 +1,9 @@
-use uuid::Uuid;
+use super::common_format::{CommonFormat, UUID_BFORMAT_PCM, UUID_PCM};
-use super::common_format::{CommonFormat, UUID_PCM,UUID_BFORMAT_PCM};
 use std::io::Cursor;
+use uuid::Uuid;
 
 use byteorder::LittleEndian;
-use byteorder::{WriteBytesExt, ReadBytesExt};
+use byteorder::{ReadBytesExt, WriteBytesExt};
 
 // Need more test cases for ADMAudioID
 #[allow(dead_code)]
@@ -22,7 +22,7 @@ use byteorder::{WriteBytesExt, ReadBytesExt};
 pub struct ADMAudioID {
     pub track_uid: [char; 12],
     pub channel_format_ref: [char; 14],
-    pub pack_ref: [char; 11]
+    pub pack_ref: [char; 11],
 }
 
 /// Describes a single channel in a WAV file.
@@ -44,7 +44,6 @@ pub struct ChannelDescriptor {
     pub adm_track_audio_ids: Vec<ADMAudioID>,
 }
 
-
 /// A bitmask indicating which channels are present in
 /// the file.
 ///
@@ -72,7 +71,6 @@ pub enum ChannelMask {
 }
 
 impl From<u32> for ChannelMask {
-    
     fn from(value: u32) -> Self {
         match value {
             0x1 => Self::FrontLeft,
@@ -93,7 +91,7 @@ impl From<u32> for ChannelMask {
             0x8000 => Self::TopBackLeft,
             0x10000 => Self::TopBackCenter,
             0x20000 => Self::TopBackRight,
-            _ => Self::DirectOut 
+            _ => Self::DirectOut,
         }
     }
 }
@@ -104,7 +102,8 @@ impl ChannelMask {
         if (input_mask & reserved_mask) > 0 {
             vec![ChannelMask::DirectOut; channel_count as usize]
         } else {
-            (0..18).map(|i| 1 << i )
+            (0..18)
+                .map(|i| 1 << i)
                 .filter(|mask| mask & input_mask > 0)
                 .map(|mask| Into::<ChannelMask>::into(mask))
                 .collect()
@@ -119,7 +118,6 @@ impl ChannelMask {
  */
 #[derive(Debug, Copy, Clone)]
 pub struct WaveFmtExtended {
-
     /// Valid bits per sample
     pub valid_bits_per_sample: u16,
 
@@ -157,10 +155,8 @@ pub struct WaveFmtExtended {
 ///
 /// [rfc3261]: https://tools.ietf.org/html/rfc2361
 
-
 #[derive(Debug, Copy, Clone)]
 pub struct WaveFmt {
-
     /// A tag identifying the codec in use.
     ///
     /// If this is 0xFFFE, the codec will be identified by a GUID
@@ -202,12 +198,10 @@ pub struct WaveFmt {
     ///
     /// Additional format metadata if `channel_count` is greater than 2,
     /// or if certain codecs are used.
-    pub extended_format: Option<WaveFmtExtended>
+    pub extended_format: Option<WaveFmtExtended>,
 }
 
-
 impl WaveFmt {
-
     pub fn valid_bits_per_sample(&self) -> u16 {
         if let Some(ext) = self.extended_format {
             ext.valid_bits_per_sample
@@ -236,14 +230,16 @@ impl WaveFmt {
             tag: 0xFFFE,
             channel_count,
             sample_rate,
-            bytes_per_second: container_bytes_per_sample as u32 * sample_rate * channel_count as u32,
+            bytes_per_second: container_bytes_per_sample as u32
+                * sample_rate
+                * channel_count as u32,
             block_alignment: container_bytes_per_sample * channel_count,
             bits_per_sample: container_bits_per_sample,
             extended_format: Some(WaveFmtExtended {
                 valid_bits_per_sample: bits_per_sample,
                 channel_mask: ChannelMask::DirectOut as u32,
-                type_guid: UUID_BFORMAT_PCM
+                type_guid: UUID_BFORMAT_PCM,
-            })
+            }),
         }
     }
 
@@ -252,23 +248,41 @@ impl WaveFmt {
     /// The order of `channels` is not important. When reading or writing
     /// audio frames you must use the standard multichannel order for Wave
     /// files, the numerical order of the cases of `ChannelMask`.
-    pub fn new_pcm_multichannel(sample_rate: u32, bits_per_sample: u16, channel_bitmap: u32) -> Self {
+    pub fn new_pcm_multichannel(
+        sample_rate: u32,
+        bits_per_sample: u16,
+        channel_bitmap: u32,
+    ) -> Self {
         let container_bits_per_sample = bits_per_sample + (bits_per_sample % 8);
         let container_bytes_per_sample = container_bits_per_sample / 8;
 
-        let channel_count: u16 = (0..=31).fold(0u16, |accum, n| accum + (0x1 & (channel_bitmap >> n) as u16) );
+        let channel_count: u16 = (0..=31).fold(0u16, |accum, n| {
+            accum + (0x1 & (channel_bitmap >> n) as u16)
+        });
 
         let result: (u16, Option<WaveFmtExtended>) = match channel_bitmap {
-            ch if bits_per_sample != container_bits_per_sample => (
+            ch if bits_per_sample != container_bits_per_sample => {
-                (0xFFFE, Some(WaveFmtExtended { valid_bits_per_sample: bits_per_sample, channel_mask: ch, 
+                ((
-                    type_guid: UUID_PCM }) )
+                    0xFFFE,
-            ),
+                    Some(WaveFmtExtended {
+                        valid_bits_per_sample: bits_per_sample,
+                        channel_mask: ch,
+                        type_guid: UUID_PCM,
+                    }),
+                ))
+            }
             0b0100 => (0x0001, None),
             0b0011 => (0x0001, None),
-            ch => (
+            ch => {
-                (0xFFFE, Some( WaveFmtExtended { valid_bits_per_sample: bits_per_sample, channel_mask: ch, 
+                ((
-                    type_guid: UUID_PCM}))
+                    0xFFFE,
-            )
+                    Some(WaveFmtExtended {
+                        valid_bits_per_sample: bits_per_sample,
+                        channel_mask: ch,
+                        type_guid: UUID_PCM,
+                    }),
+                ))
+            }
         };
 
         let (tag, extformat) = result;
@@ -277,10 +291,12 @@ impl WaveFmt {
             tag,
             channel_count,
             sample_rate,
-            bytes_per_second: container_bytes_per_sample as u32 * sample_rate * channel_count as u32,
+            bytes_per_second: container_bytes_per_sample as u32
+                * sample_rate
+                * channel_count as u32,
             block_alignment: container_bytes_per_sample * channel_count,
             bits_per_sample: container_bits_per_sample,
-            extended_format: extformat
+            extended_format: extformat,
         }
     }
 
@@ -311,8 +327,10 @@ impl WaveFmt {
     pub fn pack_frames(&self, from_frames: &[i32], into_bytes: &mut [u8]) -> () {
         let mut write_cursor = Cursor::new(into_bytes);
 
-        assert!(from_frames.len() % self.channel_count as usize == 0, 
+        assert!(
-            "frames buffer does not contain a number of samples % channel_count == 0");
+            from_frames.len() % self.channel_count as usize == 0,
+            "frames buffer does not contain a number of samples % channel_count == 0"
+        );
 
         for n in 0..from_frames.len() {
             match (self.valid_bits_per_sample(), self.bits_per_sample) {
@@ -342,55 +360,69 @@ impl WaveFmt {
         }
     }
 
-
     /// Channel descriptors for each channel.
     pub fn channels(&self) -> Vec<ChannelDescriptor> {
         match self.channel_count {
-            1 => vec![
+            1 => vec![ChannelDescriptor {
-                ChannelDescriptor {
                 index: 0,
                 speaker: ChannelMask::FrontCenter,
-                    adm_track_audio_ids: vec![]
+                adm_track_audio_ids: vec![],
-                }
+            }],
-            ],
             2 => vec![
                 ChannelDescriptor {
                     index: 0,
                     speaker: ChannelMask::FrontLeft,
-                    adm_track_audio_ids: vec![]
+                    adm_track_audio_ids: vec![],
                 },
                 ChannelDescriptor {
                     index: 1,
                     speaker: ChannelMask::FrontRight,
-                    adm_track_audio_ids: vec![]
+                    adm_track_audio_ids: vec![],
-                }
+                },
             ],
             x if x > 2 => {
                 let channel_mask = self.extended_format.map(|x| x.channel_mask).unwrap_or(0);
                 let channels = ChannelMask::channels(channel_mask, self.channel_count);
-                let channels_expanded = channels.iter().chain(std::iter::repeat(&ChannelMask::DirectOut));
+                let channels_expanded = channels
+                    .iter()
+                    .chain(std::iter::repeat(&ChannelMask::DirectOut));
 
                 (0..self.channel_count)
                     .zip(channels_expanded)
                     .map(|(n, chan)| ChannelDescriptor {
                         index: n,
                         speaker: *chan,
-                        adm_track_audio_ids: vec![]
+                        adm_track_audio_ids: vec![],
-                    }).collect()
+                    })
-            },
+                    .collect()
+            }
             x => panic!("Channel count ({}) was illegal!", x),
         }
     }
 }
 
 trait ReadWavAudioData {
-    fn read_i32_frames(&mut self, format: WaveFmt, into: &mut [i32]) -> Result<usize,std::io::Error>;
+    fn read_i32_frames(
-    fn read_f32_frames(&mut self, format: WaveFmt, into: &mut [f32]) -> Result<usize,std::io::Error>;
+        &mut self,
+        format: WaveFmt,
+        into: &mut [i32],
+    ) -> Result<usize, std::io::Error>;
+    fn read_f32_frames(
+        &mut self,
+        format: WaveFmt,
+        into: &mut [f32],
+    ) -> Result<usize, std::io::Error>;
 }
 
-impl<T> ReadWavAudioData for T where T: std::io::Read {
+impl<T> ReadWavAudioData for T
-
+where
-    fn read_i32_frames(&mut self, format: WaveFmt, into: &mut [i32]) -> Result<usize, std::io::Error> { 
+    T: std::io::Read,
+{
+    fn read_i32_frames(
+        &mut self,
+        format: WaveFmt,
+        into: &mut [i32],
+    ) -> Result<usize, std::io::Error> {
         assert!(into.len() % format.channel_count as usize == 0);
 
         for n in 0..(into.len()) {
@@ -406,11 +438,14 @@ impl<T> ReadWavAudioData for T where T: std::io::Read {
 
         todo!()
     }
-    fn read_f32_frames(&mut self, format: WaveFmt, into: &mut [f32]) -> Result<usize, std::io::Error> { 
+    fn read_f32_frames(
+        &mut self,
+        format: WaveFmt,
+        into: &mut [f32],
+    ) -> Result<usize, std::io::Error> {
         assert!(into.len() % format.channel_count as usize == 0);
         todo!()
     }
-
 }
 
 trait WriteWavAudioData {
@@ -418,8 +453,10 @@ trait WriteWavAudioData {
     fn write_f32_frames(&mut self, format: WaveFmt, from: &[f32]) -> Result<usize, std::io::Error>;
 }
 
-impl<T> WriteWavAudioData for T where T: std::io::Write {
+impl<T> WriteWavAudioData for T
-
+where
+    T: std::io::Write,
+{
     fn write_i32_frames(&mut self, format: WaveFmt, _: &[i32]) -> Result<usize, std::io::Error> {
         todo!()
     }

src/fourcc.rs

@@ -16,7 +16,12 @@ impl FourCC {
 
 impl From<[char; 4]> for FourCC {
     fn from(chars: [char; 4]) -> Self {
-        Self([chars[0] as u8 , chars[1] as u8, chars[2] as u8, chars[3] as u8])
+        Self([
+            chars[0] as u8,
+            chars[1] as u8,
+            chars[2] as u8,
+            chars[3] as u8,
+        ])
     }
 }
 
@@ -32,20 +37,28 @@ impl From<FourCC> for [u8; 4] {
     }
 }
 
-
 impl From<&FourCC> for [char; 4] {
     fn from(f: &FourCC) -> Self {
-        [f.0[0] as char, f.0[1] as char, f.0[2] as char, f.0[3] as char,]
+        [
+            f.0[0] as char,
+            f.0[1] as char,
+            f.0[2] as char,
+            f.0[3] as char,
+        ]
     }
 }
 
 impl From<FourCC> for [char; 4] {
     fn from(f: FourCC) -> Self {
-        [f.0[0] as char, f.0[1] as char, f.0[2] as char, f.0[3] as char,]
+        [
+            f.0[0] as char,
+            f.0[1] as char,
+            f.0[2] as char,
+            f.0[3] as char,
+        ]
     }
 }
 
-
 impl From<&FourCC> for String {
     fn from(f: &FourCC) -> Self {
         let chars: [char; 4] = f.into();
@@ -75,7 +88,10 @@ pub trait WriteFourCC: io::Write {
     fn write_fourcc(&mut self, fourcc: FourCC) -> Result<(), io::Error>;
 }
 
-impl<T> ReadFourCC for T where T: io::Read { 
+impl<T> ReadFourCC for T
+where
+    T: io::Read,
+{
     fn read_fourcc(&mut self) -> Result<FourCC, io::Error> {
         let mut buf: [u8; 4] = [0; 4];
         self.read_exact(&mut buf)?;
@@ -83,7 +99,10 @@ impl<T> ReadFourCC for T where T: io::Read {
     }
 }
 
-impl<T> WriteFourCC for T where T: io::Write {
+impl<T> WriteFourCC for T
+where
+    T: io::Write,
+{
     fn write_fourcc(&mut self, fourcc: FourCC) -> Result<(), io::Error> {
         let buf: [u8; 4] = fourcc.into();
         self.write_all(&buf)?;
@@ -91,7 +110,6 @@ impl<T> WriteFourCC for T where T: io::Write {
     }
 }
 
-
 pub const RIFF_SIG: FourCC = FourCC::make(b"RIFF");
 pub const WAVE_SIG: FourCC = FourCC::make(b"WAVE");
 pub const RF64_SIG: FourCC = FourCC::make(b"RF64");
@@ -117,7 +135,6 @@ pub const LABL_SIG: FourCC = FourCC::make(b"labl");
 pub const NOTE_SIG: FourCC = FourCC::make(b"note");
 pub const LTXT_SIG: FourCC = FourCC::make(b"ltxt");
 
-
 #[cfg(test)]
 mod tests {
     use super::*;

src/lib.rs

@@ -36,29 +36,29 @@ Apps we test against:
 [github]: https://github.com/iluvcapra/bwavfile
 */
 
-extern crate encoding;
 extern crate byteorder;
+extern crate encoding;
 extern crate uuid;
 
-mod fourcc;
-mod errors;
 mod common_format;
+mod errors;
+mod fourcc;
 
-mod parser;
 mod list_form;
+mod parser;
 
+mod bext;
 mod chunks;
 mod cue;
-mod bext;
 mod fmt;
 
 mod wavereader;
 mod wavewriter;
 
-pub use errors::Error;
-pub use wavereader::{WaveReader, AudioFrameReader};
-pub use wavewriter::{WaveWriter, AudioFrameWriter};
 pub use bext::Bext;
-pub use fmt::{WaveFmt, WaveFmtExtended, ChannelDescriptor, ChannelMask, ADMAudioID};
 pub use common_format::CommonFormat;
 pub use cue::Cue;
+pub use errors::Error;
+pub use fmt::{ADMAudioID, ChannelDescriptor, ChannelMask, WaveFmt, WaveFmtExtended};
+pub use wavereader::{AudioFrameReader, WaveReader};
+pub use wavewriter::{AudioFrameWriter, WaveWriter};

src/list_form.rs

@@ -1,10 +1,10 @@
 use super::fourcc::{FourCC, ReadFourCC};
-use byteorder::{ReadBytesExt, LittleEndian};
+use byteorder::{LittleEndian, ReadBytesExt};
 use std::io::{Cursor, Error, Read};
 
 pub struct ListFormItem {
     pub signature: FourCC,
-    pub contents : Vec<u8>
+    pub contents: Vec<u8>,
 }
 
 /// A helper that will accept a LIST chunk as a [u8]
@@ -26,7 +26,10 @@ pub fn collect_list_form(list_contents :& [u8]) -> Result<Vec<ListFormItem>, Err
         cursor.read_exact(&mut content_buf)?;
         remain -= this_size;
 
-        retval.push( ListFormItem { signature : this_sig, contents : content_buf } );
+        retval.push(ListFormItem {
+            signature: this_sig,
+            contents: content_buf,
+        });
 
         if this_size % 2 == 1 {
             cursor.read_u8()?;
@@ -35,6 +38,5 @@ pub fn collect_list_form(list_contents :& [u8]) -> Result<Vec<ListFormItem>, Err
         }
     }
 
-
     Ok(retval)
 }

src/parser.rs

@@ -1,15 +1,14 @@
-
+use std::collections::HashMap;
 use std::io;
 use std::io::SeekFrom::{Current, Start};
-use std::io::{Seek, Read};
+use std::io::{Read, Seek};
-use std::collections::HashMap;
 
 use byteorder::LittleEndian;
 use byteorder::ReadBytesExt;
 
 use super::errors::Error;
 use super::fourcc::{FourCC, ReadFourCC};
-use super::fourcc::{RIFF_SIG, RF64_SIG, BW64_SIG, WAVE_SIG, DS64_SIG, DATA_SIG};
+use super::fourcc::{BW64_SIG, DATA_SIG, DS64_SIG, RF64_SIG, RIFF_SIG, WAVE_SIG};
 
 // just for your reference...
 // RF64 documentation https://www.itu.int/dms_pubrec/itu-r/rec/bs/R-REC-BS.2088-1-201910-I!!PDF-E.pdf
@@ -21,12 +20,26 @@ const RF64_SIZE_MARKER: u32 = 0xFF_FF_FF_FF;
 #[derive(Debug)]
 pub enum Event {
     StartParse,
-    ReadHeader { signature: FourCC, length_field: u32 },
+    ReadHeader {
-    ReadRF64Header { signature: FourCC },
+        signature: FourCC,
-    ReadDS64 {file_size: u64, long_sizes: HashMap<FourCC,u64> },
+        length_field: u32,
-    BeginChunk { signature: FourCC, content_start: u64, content_length: u64 },
+    },
-    Failed { error: Error },
+    ReadRF64Header {
-    FinishParse
+        signature: FourCC,
+    },
+    ReadDS64 {
+        file_size: u64,
+        long_sizes: HashMap<FourCC, u64>,
+    },
+    BeginChunk {
+        signature: FourCC,
+        content_start: u64,
+        content_length: u64,
+    },
+    Failed {
+        error: Error,
+    },
+    FinishParse,
 }
 
 #[derive(Debug)]
@@ -36,24 +49,23 @@ enum State {
     ReadyForDS64,
     ReadyForChunk { at: u64, remaining: u64 },
     Error,
-    Complete
+    Complete,
 }
 
 pub struct Parser<R: Read + Seek> {
     stream: R,
     state: State,
-    ds64state: HashMap<FourCC,u64>
+    ds64state: HashMap<FourCC, u64>,
 }
 
 #[derive(Debug, PartialEq, Eq)]
 pub struct ChunkIteratorItem {
     pub signature: FourCC,
     pub start: u64,
-    pub length: u64
+    pub length: u64,
 }
 
 impl<R: Read + Seek> Parser<R> {
-    
     // wraps a stream
     pub fn make(stream: R) -> Result<Self, Error> {
         let newmap: HashMap<FourCC, u64> = HashMap::new();
@@ -63,7 +75,7 @@ impl<R: Read + Seek> Parser<R> {
             stream: the_stream,
             state: State::New,
             ds64state: newmap,
-        })
+        });
     }
 
     // pub fn into_inner(self) -> R {
@@ -71,24 +83,39 @@ impl<R: Read + Seek> Parser<R> {
     // }
 
     pub fn into_chunk_iterator(self) -> impl Iterator<Item = Result<ChunkIteratorItem, Error>> {
-        self.filter_map({|event|
+        self.filter_map({
-            if let Event::BeginChunk {signature , content_start, content_length } = event {
+            |event| {
-                Some(Ok(ChunkIteratorItem {signature, start: content_start, length: content_length }))
+                if let Event::BeginChunk {
+                    signature,
+                    content_start,
+                    content_length,
+                } = event
+                {
+                    Some(Ok(ChunkIteratorItem {
+                        signature,
+                        start: content_start,
+                        length: content_length,
+                    }))
                 } else if let Event::Failed { error } = event {
                     Some(Err(error))
                 } else {
                     None
                 }
+            }
         })
     }
 
     pub fn into_chunk_list(self) -> Result<Vec<ChunkIteratorItem>, Error> {
         let mut error = Ok(());
 
-        let chunks = self.into_chunk_iterator()
+        let chunks = self
+            .into_chunk_iterator()
             .scan(&mut error, |err, res| match res {
                 Ok(ok) => Some(ok),
-                Err(e) => { **err = Err(e); None }
+                Err(e) => {
+                    **err = Err(e);
+                    None
+                }
             })
             .collect();
 
@@ -96,7 +123,6 @@ impl<R: Read + Seek> Parser<R> {
 
         Ok(chunks)
     }
-
 }
 
 impl<R: Read + Seek> Iterator for Parser<R> {
@@ -110,7 +136,6 @@ impl<R: Read + Seek> Iterator for Parser<R> {
 }
 
 impl<R: Read + Seek> Parser<R> {
-
     fn parse_header(&mut self) -> Result<(Event, State), io::Error> {
         let file_sig = self.stream.read_fourcc()?;
         let length = self.stream.read_u32::<LittleEndian>()?;
@@ -123,24 +148,24 @@ impl<R: Read + Seek> Parser<R> {
             (RIFF_SIG, size, WAVE_SIG) => {
                 event = Event::ReadHeader {
                     signature: file_sig,
-                    length_field: size
+                    length_field: size,
                 };
 
                 next_state = State::ReadyForChunk {
                     at: 12,
                     remaining: (length - 4) as u64,
                 };
-            },
+            }
             (RF64_SIG, RF64_SIZE_MARKER, WAVE_SIG) | (BW64_SIG, RF64_SIZE_MARKER, WAVE_SIG) => {
                 event = Event::ReadRF64Header {
-                    signature: file_sig
+                    signature: file_sig,
                 };
 
                 next_state = State::ReadyForDS64;
-            },
+            }
             _ => {
                 event = Event::Failed {
-                    error: Error::HeaderNotRecognized
+                    error: Error::HeaderNotRecognized,
                 };
                 next_state = State::Error;
             }
@@ -158,7 +183,6 @@ impl<R: Read + Seek> Parser<R> {
 
         if ds64_sig != DS64_SIG {
             return Err(Error::MissingRequiredDS64);
-
         } else {
             let long_file_size = self.stream.read_u64::<LittleEndian>()?;
             let long_data_size = self.stream.read_u64::<LittleEndian>()?;
@@ -202,14 +226,12 @@ impl<R: Read + Seek> Parser<R> {
     }
 
     fn enter_chunk(&mut self, at: u64, remaining: u64) -> Result<(Event, State), io::Error> {
-
         let event;
         let state;
 
         if remaining == 0 {
             event = Event::FinishParse;
             state = State::Complete;
-
         } else {
             let this_fourcc = self.stream.read_fourcc()?;
             let this_size: u64;
@@ -221,18 +243,22 @@ impl<R: Read + Seek> Parser<R> {
                 this_size = self.stream.read_u32::<LittleEndian>()? as u64;
             }
 
-            let this_displacement :u64 = if this_size % 2 == 1 { this_size + 1 } else { this_size }; 
+            let this_displacement: u64 = if this_size % 2 == 1 {
+                this_size + 1
+            } else {
+                this_size
+            };
             self.stream.seek(Current(this_displacement as i64))?;
 
             event = Event::BeginChunk {
                 signature: this_fourcc,
                 content_start: at + 8,
-                content_length: this_size
+                content_length: this_size,
             };
 
             state = State::ReadyForChunk {
                 at: at + 8 + this_displacement,
-                remaining: remaining - 8 - this_displacement
+                remaining: remaining - 8 - this_displacement,
             }
         }
 
@@ -243,22 +269,22 @@ impl<R: Read + Seek> Parser<R> {
         match self.state {
             State::New => {
                 return Ok((Some(Event::StartParse), State::ReadyForHeader));
-            },
+            }
             State::ReadyForHeader => {
                 let (event, state) = self.parse_header()?;
                 return Ok((Some(event), state));
-            },
+            }
             State::ReadyForDS64 => {
                 let (event, state) = self.parse_ds64()?;
                 return Ok((Some(event), state));
-            },
+            }
             State::ReadyForChunk { at, remaining } => {
                 let (event, state) = self.enter_chunk(at, remaining)?;
                 return Ok((Some(event), state));
-            },
+            }
             State::Error => {
                 return Ok((Some(Event::FinishParse), State::Complete));
-            },
+            }
             State::Complete => {
                 return Ok((None, State::Complete));
             }
@@ -269,11 +295,15 @@ impl<R: Read + Seek> Parser<R> {
         match self.handle_state() {
             Ok((event, state)) => {
                 return (event, state);
-            },
+            }
             Err(error) => {
-                return (Some(Event::Failed { error: error.into() } ), State::Error );
+                return (
+                    Some(Event::Failed {
+                        error: error.into(),
+                    }),
+                    State::Error,
+                );
             }
         }
     }
 }
-

src/wavereader.rs

@@ -1,29 +1,28 @@
-
 use std::fs::File;
 
 use std::path::Path;
 
-use std::io::SeekFrom;
 use std::io::Cursor;
-use std::io::{Read, Seek, BufReader};
+use std::io::SeekFrom;
-use std::io::SeekFrom::{Start,Current,};
+use std::io::SeekFrom::{Current, Start};
+use std::io::{BufReader, Read, Seek};
 
-use super::parser::Parser;
-use super::fourcc::{FourCC, ReadFourCC, FMT__SIG, DATA_SIG, BEXT_SIG, LIST_SIG,
-    JUNK_SIG, FLLR_SIG, CUE__SIG, ADTL_SIG, AXML_SIG, IXML_SIG};
-use super::errors::Error as ParserError;
-use super::fmt::{WaveFmt, ChannelDescriptor, ChannelMask};
 use super::bext::Bext;
 use super::chunks::ReadBWaveChunks;
 use super::cue::Cue;
+use super::errors::Error as ParserError;
 use super::errors::Error;
+use super::fmt::{ChannelDescriptor, ChannelMask, WaveFmt};
+use super::fourcc::{
+    FourCC, ReadFourCC, ADTL_SIG, AXML_SIG, BEXT_SIG, CUE__SIG, DATA_SIG, FLLR_SIG, FMT__SIG,
+    IXML_SIG, JUNK_SIG, LIST_SIG,
+};
+use super::parser::Parser;
 use super::CommonFormat;
 
 use byteorder::LittleEndian;
 use byteorder::ReadBytesExt;
 
-
-
 /// Read audio frames
 ///
 /// The inner reader is interpreted as a raw audio data
@@ -34,11 +33,10 @@ pub struct AudioFrameReader<R: Read + Seek> {
     inner: R,
     format: WaveFmt,
     start: u64,
-    length: u64
+    length: u64,
 }
 
 impl<R: Read + Seek> AudioFrameReader<R> {
-
     /// Create a new `AudioFrameReader`
     ///
     /// ### Panics
@@ -48,15 +46,27 @@ impl<R: Read + Seek> AudioFrameReader<R> {
     /// and the format tag is readable by this implementation (only
     /// format 0x01 is supported at this time.)
     pub fn new(mut inner: R, format: WaveFmt, start: u64, length: u64) -> Result<Self, Error> {
-        assert!(format.block_alignment * 8 == format.bits_per_sample * format.channel_count, 
+        assert!(
+            format.block_alignment * 8 == format.bits_per_sample * format.channel_count,
             "Unable to read audio frames from packed formats: block alignment is {}, should be {}",
-            format.block_alignment, (format.bits_per_sample / 8 ) * format.channel_count);
+            format.block_alignment,
+            (format.bits_per_sample / 8) * format.channel_count
+        );
 
-        assert!(format.common_format() == CommonFormat::IntegerPCM || format.common_format() == CommonFormat::IeeeFloatPCM, 
+        assert!(
-                "Unsupported format tag {:?}", format.tag);
+            format.common_format() == CommonFormat::IntegerPCM
+                || format.common_format() == CommonFormat::IeeeFloatPCM,
+            "Unsupported format tag {:?}",
+            format.tag
+        );
 
         inner.seek(Start(start))?;
-        Ok( AudioFrameReader { inner , format , start, length} )
+        Ok(AudioFrameReader {
+            inner,
+            format,
+            start,
+            length,
+        })
     }
 
     /// Unwrap the inner reader.
@@ -78,7 +88,6 @@ impl<R: Read + Seek> AudioFrameReader<R> {
         Ok((seek_result - self.start) / self.format.block_alignment as u64)
     }
 
-
     /// Read a frame
     ///
     /// A single frame is read from the audio stream and the read location
@@ -98,9 +107,12 @@ impl<R: Read + Seek> AudioFrameReader<R> {
     /// The `buffer` must have a number of elements equal to the number of
     /// channels and this method will panic if this is not the case.
     pub fn read_integer_frame(&mut self, buffer: &mut [i32]) -> Result<u64, Error> {
-        assert!(buffer.len() as u16 == self.format.channel_count, 
+        assert!(
+            buffer.len() as u16 == self.format.channel_count,
             "read_integer_frame was called with a mis-sized buffer, expected {}, was {}",
-            self.format.channel_count, buffer.len());
+            self.format.channel_count,
+            buffer.len()
+        );
 
         let framed_bits_per_sample = self.format.block_alignment * 8 / self.format.channel_count;
 
@@ -124,9 +136,12 @@ impl<R: Read + Seek> AudioFrameReader<R> {
     }
 
     pub fn read_float_frame(&mut self, buffer: &mut [f32]) -> Result<u64, Error> {
-        assert!(buffer.len() as u16 == self.format.channel_count,
+        assert!(
+            buffer.len() as u16 == self.format.channel_count,
             "read_float_frame was called with a mis-sized buffer, expected {}, was {}",
-            self.format.channel_count, buffer.len());
+            self.format.channel_count,
+            buffer.len()
+        );
 
         let framed_bits_per_sample = self.format.block_alignment * 8 / self.format.channel_count;
 
@@ -192,14 +207,12 @@ impl<R: Read + Seek> AudioFrameReader<R> {
 /// [itu2088]: https://www.itu.int/dms_pubrec/itu-r/rec/bs/R-REC-BS.2088-1-201910-I!!PDF-E.pdf
 /// [rfc3261]: https://tools.ietf.org/html/rfc2361
 
-
 #[derive(Debug)]
 pub struct WaveReader<R: Read + Seek> {
     pub inner: R,
 }
 
 impl WaveReader<BufReader<File>> {
-
     pub fn open<P: AsRef<Path>>(path: P) -> Result<Self, ParserError> {
         let f = File::open(path)?;
         let inner = BufReader::new(f);
@@ -208,19 +221,17 @@ impl WaveReader<BufReader<File>> {
 }
 
 impl WaveReader<File> {
-    
     /// Open a file for reading with unbuffered IO.
     ///
     /// A convenience that opens `path` and calls `Self::new()`
 
     pub fn open_unbuffered<P: AsRef<Path>>(path: P) -> Result<Self, ParserError> {
         let inner = File::open(path)?;
-        return Ok( Self::new(inner)? )
+        return Ok(Self::new(inner)?);
     }
 }
 
 impl<R: Read + Seek> WaveReader<R> {
-    
     /// Wrap a `Read` struct in a new `WaveReader`.
     ///
     /// This is the primary entry point into the `WaveReader` interface. The
@@ -257,7 +268,6 @@ impl<R: Read + Seek> WaveReader<R> {
         Ok(retval)
     }
 
-    
     /// Unwrap the inner reader.
     pub fn into_inner(self) -> R {
         return self.inner;
@@ -269,10 +279,14 @@ impl<R: Read + Seek> WaveReader<R> {
     pub fn audio_frame_reader(mut self) -> Result<AudioFrameReader<R>, ParserError> {
         let format = self.format()?;
         let audio_chunk_reader = self.get_chunk_extent_at_index(DATA_SIG, 0)?;
-        Ok(AudioFrameReader::new(self.inner, format, audio_chunk_reader.0, audio_chunk_reader.1)?)
+        Ok(AudioFrameReader::new(
+            self.inner,
+            format,
+            audio_chunk_reader.0,
+            audio_chunk_reader.1,
+        )?)
     }
 
-    
     /// The count of audio frames in the file.
     pub fn frame_length(&mut self) -> Result<u64, ParserError> {
         let (_, data_length) = self.get_chunk_extent_at_index(DATA_SIG, 0)?;
@@ -280,7 +294,6 @@ impl<R: Read + Seek> WaveReader<R> {
         Ok(data_length / (format.block_alignment as u64))
     }
 
-    
     /// Sample and frame format of this wave file.
     ///
     pub fn format(&mut self) -> Result<WaveFmt, ParserError> {
@@ -300,7 +313,6 @@ impl<R: Read + Seek> WaveReader<R> {
         } else {
             Ok(None)
         }
-
     }
 
     /// Describe the channels in this file
@@ -321,17 +333,21 @@ impl<R: Read + Seek> WaveReader<R> {
     /// assert_eq!(chans[4].speaker, ChannelMask::BackLeft);
     /// ```
     pub fn channels(&mut self) -> Result<Vec<ChannelDescriptor>, ParserError> {
-        
         let format = self.format()?;
         let channel_masks: Vec<ChannelMask> = match (format.channel_count, format.extended_format) {
             (1, _) => vec![ChannelMask::FrontCenter],
             (2, _) => vec![ChannelMask::FrontLeft, ChannelMask::FrontRight],
             (n, Some(x)) => ChannelMask::channels(x.channel_mask, n),
-            (n,_) => vec![ChannelMask::DirectOut; n as usize]
+            (n, _) => vec![ChannelMask::DirectOut; n as usize],
         };
 
-        Ok( (0..format.channel_count).zip(channel_masks)
+        Ok((0..format.channel_count)
-            .map(|(i,m)| ChannelDescriptor { index: i, speaker:m, adm_track_audio_ids: vec![] } )
+            .zip(channel_masks)
+            .map(|(i, m)| ChannelDescriptor {
+                index: i,
+                speaker: m,
+                adm_track_audio_ids: vec![],
+            })
             .collect())
     }
 
@@ -371,7 +387,7 @@ impl<R: Read + Seek> WaveReader<R> {
         match (cue_read, adtl_read) {
             (0, _) => Ok(vec![]),
             (_, 0) => Ok(Cue::collect_from(&cue_buffer, None)?),
-            (_,_) => Ok( Cue::collect_from(&cue_buffer, Some(&adtl_buffer) )? )
+            (_, _) => Ok(Cue::collect_from(&cue_buffer, Some(&adtl_buffer))?),
         }
     }
 
@@ -395,7 +411,6 @@ impl<R: Read + Seek> WaveReader<R> {
         self.read_chunk(AXML_SIG, 0, buffer)
     }
 
-
     /**
      * Validate file is readable.
      *
@@ -446,7 +461,10 @@ impl<R: Read + Seek> WaveReader<R> {
         self.validate_readable()?;
 
         let chunk_fourccs: Vec<FourCC> = Parser::make(&mut self.inner)?
-            .into_chunk_list()?.iter().map(|c| c.signature ).collect();
+            .into_chunk_list()?
+            .iter()
+            .map(|c| c.signature)
+            .collect();
 
         if chunk_fourccs == vec![FMT__SIG, DATA_SIG] {
             Ok(()) /* FIXME: finish implementation */
@@ -509,28 +527,37 @@ impl<R: Read + Seek> WaveReader<R> {
         let chunks = Parser::make(&mut self.inner)?.into_chunk_list()?;
         let ds64_space_required = 92;
 
-        let eligible_filler_chunks = chunks.iter()
+        let eligible_filler_chunks = chunks
+            .iter()
             .take_while(|c| c.signature == JUNK_SIG || c.signature == FLLR_SIG);
 
         let filler = eligible_filler_chunks
             .enumerate()
-            .fold(0, |accum, (n, item)| if n == 0 { accum + item.length } else {accum + item.length + 8});
+            .fold(0, |accum, (n, item)| {
+                if n == 0 {
+                    accum + item.length
+                } else {
+                    accum + item.length + 8
+                }
+            });
 
         if filler < ds64_space_required {
-            Err(ParserError::InsufficientDS64Reservation {expected: ds64_space_required, actual: filler})
+            Err(ParserError::InsufficientDS64Reservation {
+                expected: ds64_space_required,
+                actual: filler,
+            })
         } else {
             let data_pos = chunks.iter().position(|c| c.signature == DATA_SIG);
 
             match data_pos {
                 Some(p) if p == chunks.len() - 1 => Ok(()),
-                _ => Err(ParserError::DataChunkNotPreparedForAppend)
+                _ => Err(ParserError::DataChunkNotPreparedForAppend),
             }
         }
     }
 }
 
 impl<R: Read + Seek> WaveReader<R> {
-
     // Private implementation
     //
     // As time passes thi get smore obnoxious because I haven't implemented recursive chunk
@@ -549,17 +576,22 @@ impl<R:Read+Seek> WaveReader<R> {
         }
     }
 
-
+    fn read_chunk(
-    fn read_chunk(&mut self, ident: FourCC, at: u32, mut buffer: &mut Vec<u8>) -> Result<usize, ParserError> {
+        &mut self,
-
+        ident: FourCC,
+        at: u32,
+        mut buffer: &mut Vec<u8>,
+    ) -> Result<usize, ParserError> {
         match self.get_chunk_extent_at_index(ident, at) {
             Ok((start, length)) => {
                 buffer.resize(length as usize, 0x0);
                 self.inner.seek(SeekFrom::Start(start))?;
-                self.inner.read(&mut buffer).map_err(|e| ParserError::IOError(e))
+                self.inner
-            },
+                    .read(&mut buffer)
+                    .map_err(|e| ParserError::IOError(e))
+            }
             Err(ParserError::ChunkMissing { signature: _ }) => Ok(0),
-            Err( any ) => Err(any.into())
+            Err(any) => Err(any.into()),
         }
     }
 
@@ -567,8 +599,10 @@ impl<R:Read+Seek> WaveReader<R> {
     fn get_chunks_extents(&mut self, fourcc: FourCC) -> Result<Vec<(u64, u64)>, ParserError> {
         let p = Parser::make(&mut self.inner)?.into_chunk_list()?;
 
-        Ok( p.iter().filter(|item| item.signature == fourcc)
+        Ok(p.iter()
-            .map(|item| (item.start, item.length)).collect() )
+            .filter(|item| item.signature == fourcc)
+            .map(|item| (item.start, item.length))
+            .collect())
     }
 
     /// Index of first LIST for with the given FORM fourcc
@@ -584,7 +618,11 @@ impl<R:Read+Seek> WaveReader<R> {
         Ok(None)
     }
 
-    fn get_chunk_extent_at_index(&mut self, fourcc: FourCC, index: u32) -> Result<(u64,u64), ParserError> {
+    fn get_chunk_extent_at_index(
+        &mut self,
+        fourcc: FourCC,
+        index: u32,
+    ) -> Result<(u64, u64), ParserError> {
         if let Some((start, length)) = self.get_chunks_extents(fourcc)?.iter().nth(index as usize) {
             Ok((*start, *length))
         } else {
@@ -601,5 +639,4 @@ fn test_list_form() {
     f.read_list(ADTL_SIG, &mut buf).unwrap();
 
     assert_ne!(buf.len(), 0);
-
 }

src/wavewriter.rs

@@ -1,15 +1,16 @@
 use std::fs::File;
+use std::io::{BufWriter, Cursor, Seek, SeekFrom, Write};
 use std::path::Path;
-use std::io::{Write,Seek,SeekFrom,Cursor,BufWriter};
 
-use super::Error;
-use super::fourcc::{FourCC, WriteFourCC, RIFF_SIG, RF64_SIG, DS64_SIG,
-    WAVE_SIG, FMT__SIG, DATA_SIG, ELM1_SIG, JUNK_SIG, BEXT_SIG,AXML_SIG, 
-    IXML_SIG};
 use super::fmt::WaveFmt;
+use super::fourcc::{
+    FourCC, WriteFourCC, AXML_SIG, BEXT_SIG, DATA_SIG, DS64_SIG, ELM1_SIG, FMT__SIG, IXML_SIG,
+    JUNK_SIG, RF64_SIG, RIFF_SIG, WAVE_SIG,
+};
+use super::Error;
 //use super::common_format::CommonFormat;
-use super::chunks::WriteBWaveChunks;
 use super::bext::Bext;
+use super::chunks::WriteBWaveChunks;
 
 use byteorder::LittleEndian;
 use byteorder::WriteBytesExt;
@@ -17,19 +18,26 @@ use byteorder::WriteBytesExt;
 /// Write audio frames to a `WaveWriter`.
 ///
 ///
-pub struct AudioFrameWriter<W> where W: Write + Seek {
+pub struct AudioFrameWriter<W>
-    inner : WaveChunkWriter<W>
+where
+    W: Write + Seek,
+{
+    inner: WaveChunkWriter<W>,
 }
 
-impl<W> AudioFrameWriter<W> where W: Write + Seek {
+impl<W> AudioFrameWriter<W>
-
+where
+    W: Write + Seek,
+{
     fn new(inner: WaveChunkWriter<W>) -> Self {
         AudioFrameWriter { inner }
     }
 
     fn write_integer_frames_to_buffer(&self, from_frames: &[i32], to_buffer: &mut [u8]) -> () {
-        assert!(from_frames.len() % self.inner.inner.format.channel_count as usize == 0, 
+        assert!(
-            "frames buffer does not contain a number of samples % channel_count == 0");
+            from_frames.len() % self.inner.inner.format.channel_count as usize == 0,
+            "frames buffer does not contain a number of samples % channel_count == 0"
+        );
         self.inner.inner.format.pack_frames(&from_frames, to_buffer);
         ()
     }
@@ -41,7 +49,10 @@ impl<W> AudioFrameWriter<W> where W: Write + Seek {
     /// This function will panic if `buffer.len()` modulo the Wave file's channel count
     /// is not zero.
     pub fn write_integer_frames(&mut self, buffer: &[i32]) -> Result<u64, Error> {
-        let mut write_buffer = self.inner.inner.format
+        let mut write_buffer = self
+            .inner
+            .inner
+            .format
             .create_raw_buffer(buffer.len() / self.inner.inner.format.channel_count as usize);
 
         self.write_integer_frames_to_buffer(&buffer, &mut write_buffer);
@@ -68,22 +79,32 @@ impl<W> AudioFrameWriter<W> where W: Write + Seek {
 ///
 /// When you are done writing to a chunk you must call `end()` in order to
 /// finalize the chunk for storage.
-pub struct WaveChunkWriter<W> where W: Write + Seek {
+pub struct WaveChunkWriter<W>
+where
+    W: Write + Seek,
+{
     ident: FourCC,
     inner: WaveWriter<W>,
     content_start_pos: u64,
-    length : u64
+    length: u64,
 }
 
-impl<W> WaveChunkWriter<W> where W: Write + Seek {
+impl<W> WaveChunkWriter<W>
-
+where
+    W: Write + Seek,
+{
     fn begin(mut inner: WaveWriter<W>, ident: FourCC) -> Result<Self, Error> {
         let length: u64 = 0;
         inner.inner.write_fourcc(ident)?;
         inner.inner.write_u32::<LittleEndian>(length as u32)?;
         inner.increment_form_length(8)?;
         let content_start_pos = inner.inner.seek(SeekFrom::End(0))?;
-        Ok( WaveChunkWriter { ident, inner , content_start_pos, length } )
+        Ok(WaveChunkWriter {
+            ident,
+            inner,
+            content_start_pos,
+            length,
+        })
     }
 
     fn end(mut self) -> Result<WaveWriter<W>, Error> {
@@ -98,29 +119,38 @@ impl<W> WaveChunkWriter<W> where W: Write + Seek {
     fn increment_chunk_length(&mut self, amount: u64) -> Result<(), std::io::Error> {
         self.length = self.length + amount;
         if !self.inner.is_rf64 {
-            self.inner.inner.seek(SeekFrom::Start(self.content_start_pos - 4))?;
+            self.inner
-            self.inner.inner.write_u32::<LittleEndian>(self.length as u32)?;
+                .inner
+                .seek(SeekFrom::Start(self.content_start_pos - 4))?;
+            self.inner
+                .inner
+                .write_u32::<LittleEndian>(self.length as u32)?;
         } else {
             if self.ident == DATA_SIG {
                 let data_chunk_64bit_field_offset = 8 + 4 + 8 + 8;
-                self.inner.inner.seek(SeekFrom::Start(self.content_start_pos - 4))?;
+                self.inner
+                    .inner
+                    .seek(SeekFrom::Start(self.content_start_pos - 4))?;
                 self.inner.inner.write_u32::<LittleEndian>(0xFFFF_FFFF)?;
                 // this only need to happen once, not every time we increment
 
-                self.inner.inner.seek(SeekFrom::Start(data_chunk_64bit_field_offset))?;
+                self.inner
+                    .inner
+                    .seek(SeekFrom::Start(data_chunk_64bit_field_offset))?;
                 self.inner.inner.write_u64::<LittleEndian>(self.length)?;
             } else {
                 todo!("FIXME RF64 wave writing is not yet supported for chunks other than `data`")
             }
-            
         }
 
         Ok(())
     }
 }
 
-impl<W> Write for WaveChunkWriter<W> where W: Write + Seek {
+impl<W> Write for WaveChunkWriter<W>
-
+where
+    W: Write + Seek,
+{
     fn write(&mut self, buffer: &[u8]) -> Result<usize, std::io::Error> {
         self.inner.inner.seek(SeekFrom::End(0))?;
         let written = self.inner.inner.write(buffer)?;
@@ -198,7 +228,10 @@ impl<W> Write for WaveChunkWriter<W> where W: Write + Seek {
 /// [ebu3306v2]: https://tech.ebu.ch/docs/tech/tech3306.pdf
 /// [itu2088]: https://www.itu.int/dms_pubrec/itu-r/rec/bs/R-REC-BS.2088-1-201910-I!!PDF-E.pdf
 /// [rfc3261]: https://tools.ietf.org/html/rfc2361
-pub struct WaveWriter<W> where W: Write + Seek {
+pub struct WaveWriter<W>
+where
+    W: Write + Seek,
+{
     inner: W,
     form_length: u64,
 
@@ -206,13 +239,12 @@ pub struct WaveWriter<W> where W: Write + Seek {
     pub is_rf64: bool,
 
     /// Format of the wave file.
-    pub format: WaveFmt
+    pub format: WaveFmt,
 }
 
 const DS64_RESERVATION_LENGTH: u32 = 96;
 
 impl WaveWriter<BufWriter<File>> {
-
     /// Create a new Wave file at `path`.
     pub fn create<P: AsRef<Path>>(path: P, format: WaveFmt) -> Result<Self, Error> {
         let f = File::create(path)?;
@@ -229,8 +261,10 @@ impl WaveWriter<File> {
     }
 }
 
-impl<W> WaveWriter<W> where W: Write + Seek {
+impl<W> WaveWriter<W>
-
+where
+    W: Write + Seek,
+{
     /// Wrap a writer in a Wave writer.
     ///
     /// The inner writer will immediately have a RIFF WAVE file header
@@ -241,7 +275,12 @@ impl<W> WaveWriter<W> where W: Write + Seek {
         inner.write_u32::<LittleEndian>(0)?;
         inner.write_fourcc(WAVE_SIG)?;
 
-        let mut retval = WaveWriter { inner, form_length: 0, is_rf64: false, format};
+        let mut retval = WaveWriter {
+            inner,
+            form_length: 0,
+            is_rf64: false,
+            format,
+        };
 
         retval.increment_form_length(4)?;
 
@@ -350,10 +389,10 @@ impl<W> WaveWriter<W> where W: Write + Seek {
             self.inner.write_u64::<LittleEndian>(self.form_length)?;
         } else if self.form_length < u32::MAX as u64 {
             self.inner.seek(SeekFrom::Start(4))?;
-            self.inner.write_u32::<LittleEndian>(self.form_length as u32)?;
+            self.inner
+                .write_u32::<LittleEndian>(self.form_length as u32)?;
         } else {
             self.promote_to_rf64()?;
-            
         }
         Ok(())
     }
@@ -361,9 +400,9 @@ impl<W> WaveWriter<W> where W: Write + Seek {
 
 #[test]
 fn test_new() {
-    use std::io::Cursor;
     use super::fourcc::ReadFourCC;
     use byteorder::ReadBytesExt;
+    use std::io::Cursor;
 
     let mut cursor = Cursor::new(vec![0u8; 0]);
     let format = WaveFmt::new_pcm_mono(4800, 24);
@@ -387,9 +426,9 @@ fn test_new() {
 
 #[test]
 fn test_write_audio() {
-    use std::io::Cursor;
     use super::fourcc::ReadFourCC;
     use byteorder::ReadBytesExt;
+    use std::io::Cursor;
 
     let mut cursor = Cursor::new(vec![0u8; 0]);
     let format = WaveFmt::new_pcm_mono(48000, 24);
@@ -430,7 +469,10 @@ fn test_write_audio() {
     let tell = cursor.seek(SeekFrom::Current(0)).unwrap();
     assert!(tell % 0x4000 == 0);
 
-    assert_eq!(form_size, 4 + 8 + junk_size + 8 + fmt_size + 8 + elm1_size + 8 + data_size + data_size % 2)
+    assert_eq!(
+        form_size,
+        4 + 8 + junk_size + 8 + fmt_size + 8 + elm1_size + 8 + data_size + data_size % 2
+    )
 }
 
 #[test]
@@ -469,7 +511,6 @@ fn test_write_bext() {
     frame_writer.end().unwrap();
 }
 
-
 // NOTE! This test of RF64 writing takes several minutes to complete.
 #[test]
 fn test_create_rf64() {
@@ -493,7 +534,10 @@ fn test_create_rf64() {
     }
     af.end().unwrap();
 
-    assert!(cursor.seek(SeekFrom::End(0)).unwrap() > 0xFFFF_FFFFu64, "internal test error, Created file is not long enough to be RF64" );
+    assert!(
+        cursor.seek(SeekFrom::End(0)).unwrap() > 0xFFFF_FFFFu64,
+        "internal test error, Created file is not long enough to be RF64"
+    );
     let expected_data_length = four_and_a_half_hours_of_frames * format.block_alignment as u64;
 
     cursor.seek(SeekFrom::Start(0)).unwrap();
@@ -506,20 +550,33 @@ fn test_create_rf64() {
     let form_size = cursor.read_u64::<LittleEndian>().unwrap();
     let data_size = cursor.read_u64::<LittleEndian>().unwrap();
     assert_eq!(data_size, expected_data_length);
-    cursor.seek(SeekFrom::Current(ds64_size as i64 - 16)).unwrap();
+    cursor
+        .seek(SeekFrom::Current(ds64_size as i64 - 16))
+        .unwrap();
 
     assert_eq!(cursor.read_fourcc().unwrap(), FMT__SIG);
     let fmt_size = cursor.read_u32::<LittleEndian>().unwrap();
-    cursor.seek(SeekFrom::Current((fmt_size + fmt_size % 2) as i64)).unwrap();
+    cursor
+        .seek(SeekFrom::Current((fmt_size + fmt_size % 2) as i64))
+        .unwrap();
 
     assert_eq!(cursor.read_fourcc().unwrap(), ELM1_SIG);
     let elm1_size = cursor.read_u32::<LittleEndian>().unwrap();
-    let data_start = cursor.seek(SeekFrom::Current((elm1_size + elm1_size % 2) as i64)).unwrap();
+    let data_start = cursor
+        .seek(SeekFrom::Current((elm1_size + elm1_size % 2) as i64))
+        .unwrap();
 
-    assert!((data_start + 8) % 0x4000 == 0, "data content start is not aligned, starts at {}", data_start + 8);
+    assert!(
+        (data_start + 8) % 0x4000 == 0,
+        "data content start is not aligned, starts at {}",
+        data_start + 8
+    );
     assert_eq!(cursor.read_fourcc().unwrap(), DATA_SIG);
     assert_eq!(cursor.read_u32::<LittleEndian>().unwrap(), 0xFFFF_FFFF);
     cursor.seek(SeekFrom::Current(data_size as i64)).unwrap();
 
-    assert_eq!(4 + 8 + ds64_size as u64 + 8 + data_size + 8 + fmt_size as u64 + 8 + elm1_size as u64, form_size)
+    assert_eq!(
+        4 + 8 + ds64_size as u64 + 8 + data_size + 8 + fmt_size as u64 + 8 + elm1_size as u64,
+        form_size
+    )
 }

tests/ffprobe_media_tests.rs

@@ -1,7 +1,6 @@
-
 extern crate serde_json;
 use core::fmt::Debug;
-use serde_json::{Value, from_str};
+use serde_json::{from_str, Value};
 use std::fs::File;
 use std::io::Read;
 
@@ -13,20 +12,18 @@ use bwavfile::WaveReader;
 // as read by `WaveReader`.
 
 // This is rickety but we're going with it
-fn assert_match_stream<T>(stream_key: &str, 
+fn assert_match_stream<T>(stream_key: &str, other: impl Fn(&mut WaveReader<File>) -> T)
-                    other: impl Fn(&mut WaveReader<File>) -> T)
+where
-                    where T: PartialEq + Debug,
+    T: PartialEq + Debug,
-                          T: Into<Value>
+    T: Into<Value>,
 {
-
     let mut json_file = File::open("tests/ffprobe_media_tests.json").unwrap();
     let mut s = String::new();
     json_file.read_to_string(&mut s).unwrap();
-    if let Value::Array(v) = from_str(&mut s).unwrap() { /* */
+    if let Value::Array(v) = from_str(&mut s).unwrap() {
+        /* */
         v.iter()
-            .filter(|value| {
+            .filter(|value| !value["format"]["filename"].is_null())
-                !value["format"]["filename"].is_null()
-            })
             .for_each(|value| {
                 let filen: &str = value["format"]["filename"].as_str().unwrap();
                 let json_value: &Value = &value["streams"][0][stream_key];
@@ -34,7 +31,6 @@ fn assert_match_stream<T>(stream_key: &str,
                 let wavfile_value: T = other(&mut wavfile);
                 println!("asserting {} for {}", stream_key, filen);
                 assert_eq!(Into::<Value>::into(wavfile_value), *json_value);
-
             })
     }
 }
@@ -46,7 +42,9 @@ fn test_frame_count() {
 
 #[test]
 fn test_sample_rate() {
-    assert_match_stream("sample_rate", |w| format!("{}", w.format().unwrap().sample_rate) );
+    assert_match_stream("sample_rate", |w| {
+        format!("{}", w.format().unwrap().sample_rate)
+    });
 }
 
 #[test]

tests/integration_test.rs

@@ -1,17 +1,15 @@
 extern crate bwavfile;
 
-use bwavfile::WaveReader;
+use bwavfile::ChannelMask;
 use bwavfile::Error;
-use bwavfile::{ ChannelMask}; 
+use bwavfile::WaveReader;
 
 #[test]
 fn test_open() {
     let path = "tests/media/ff_silence.wav";
 
     match WaveReader::open(path) {
-        Ok(_) => {
+        Ok(_) => (),
-            ()
-        }, 
         Err(x) => {
             assert!(false, "Opened error.wav with unexpected error {:?}", x)
         }
@@ -86,8 +84,6 @@ fn test_read() {
 
     let mut reader = w.audio_frame_reader().unwrap();
 
-    
-
     assert_eq!(reader.read_integer_frame(&mut buffer).unwrap(), 1);
     assert_eq!(buffer[0], -2823_i32);
     assert_eq!(reader.read_integer_frame(&mut buffer).unwrap(), 1);
@@ -162,9 +158,11 @@ fn test_channels_stereo_no_fmt_extended() {
 #[test]
 fn test_frame_reader_consumes_reader() {
     // Issue #6
-    use bwavfile::{WaveFmt, AudioFrameReader};
+    use bwavfile::{AudioFrameReader, WaveFmt};
     use std::fs::File;
-    fn from_wav_filename(wav_filename: &str) -> Result<(WaveFmt, AudioFrameReader<std::io::BufReader<File>>), ()> {
+    fn from_wav_filename(
+        wav_filename: &str,
+    ) -> Result<(WaveFmt, AudioFrameReader<std::io::BufReader<File>>), ()> {
         if let Ok(mut r) = WaveReader::open(&wav_filename) {
             let format = r.format().unwrap();
             let frame_reader = r.audio_frame_reader().unwrap();