From a3774632a0848eda5cfce89d9a97364eacb8d1b6 Mon Sep 17 00:00:00 2001
From: marcelbuesing <buesing.marcel@googlemail.com>
Date: Fri, 25 Sep 2020 16:11:30 +0200
Subject: [PATCH 01/27] Align PLAYER_EVENT naming

---
 src/player_event_handler.rs | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/player_event_handler.rs b/src/player_event_handler.rs
index 00b6c09f..464d877b 100644
--- a/src/player_event_handler.rs
+++ b/src/player_event_handler.rs
@@ -24,16 +24,16 @@ pub fn run_program_on_events(event: PlayerEvent, onevent: &str) -> Option<io::Re
             old_track_id,
             new_track_id,
         } => {
-            env_vars.insert("PLAYER_EVENT", "change".to_string());
+            env_vars.insert("PLAYER_EVENT", "changed".to_string());
             env_vars.insert("OLD_TRACK_ID", old_track_id.to_base62());
             env_vars.insert("TRACK_ID", new_track_id.to_base62());
         }
         PlayerEvent::Started { track_id, .. } => {
-            env_vars.insert("PLAYER_EVENT", "start".to_string());
+            env_vars.insert("PLAYER_EVENT", "started".to_string());
             env_vars.insert("TRACK_ID", track_id.to_base62());
         }
         PlayerEvent::Stopped { track_id, .. } => {
-            env_vars.insert("PLAYER_EVENT", "stop".to_string());
+            env_vars.insert("PLAYER_EVENT", "stopped".to_string());
             env_vars.insert("TRACK_ID", track_id.to_base62());
         }
         PlayerEvent::Playing {

From 37a5796a86d77691250402af9c09c11eb60a18eb Mon Sep 17 00:00:00 2001
From: Sasha Hilton <sashahilton00@gmail.com>
Date: Thu, 21 Jan 2021 19:16:05 +0000
Subject: [PATCH 02/27] Add option to choose between track or album
 normalisation gain, default album.

---
 playback/src/config.rs | 25 +++++++++++++++++++++++++
 playback/src/player.rs | 17 ++++++++++-------
 src/main.rs            | 16 +++++++++++++++-
 3 files changed, 50 insertions(+), 8 deletions(-)

diff --git a/playback/src/config.rs b/playback/src/config.rs
index 9d65042c..0a9bb47d 100644
--- a/playback/src/config.rs
+++ b/playback/src/config.rs
@@ -25,10 +25,34 @@ impl Default for Bitrate {
     }
 }
 
+#[derive(Clone, Debug)]
+pub enum NormalisationType {
+    Album,
+    Track,
+}
+
+impl FromStr for NormalisationType {
+    type Err = ();
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        match s {
+            "album" => Ok(NormalisationType::Album),
+            "track" => Ok(NormalisationType::Track),
+            _ => Err(()),
+        }
+    }
+}
+
+impl Default for NormalisationType {
+    fn default() -> NormalisationType {
+        NormalisationType::Album
+    }
+}
+
 #[derive(Clone, Debug)]
 pub struct PlayerConfig {
     pub bitrate: Bitrate,
     pub normalisation: bool,
+    pub normalisation_type: NormalisationType,
     pub normalisation_pregain: f32,
     pub gapless: bool,
 }
@@ -38,6 +62,7 @@ impl Default for PlayerConfig {
         PlayerConfig {
             bitrate: Bitrate::default(),
             normalisation: false,
+            normalisation_type: NormalisationType::default(),
             normalisation_pregain: 0.0,
             gapless: true,
         }
diff --git a/playback/src/player.rs b/playback/src/player.rs
index 125184a0..d8350bb6 100644
--- a/playback/src/player.rs
+++ b/playback/src/player.rs
@@ -9,7 +9,7 @@ use std::mem;
 use std::thread;
 use std::time::{Duration, Instant};
 
-use crate::config::{Bitrate, PlayerConfig};
+use crate::config::{Bitrate, NormalisationType, PlayerConfig};
 use librespot_core::session::Session;
 use librespot_core::spotify_id::SpotifyId;
 
@@ -214,17 +214,20 @@ impl NormalisationData {
     }
 
     fn get_factor(config: &PlayerConfig, data: NormalisationData) -> f32 {
-        let mut normalisation_factor = f32::powf(
-            10.0,
-            (data.track_gain_db + config.normalisation_pregain) / 20.0,
-        );
+        let [gain_db, gain_peak] = match config.normalisation_type {
+            NormalisationType::Album => [data.album_gain_db, data.album_peak],
+            NormalisationType::Track => [data.track_gain_db, data.track_peak],
+        };
+        let mut normalisation_factor =
+            f32::powf(10.0, (gain_db + config.normalisation_pregain) / 20.0);
 
-        if normalisation_factor * data.track_peak > 1.0 {
+        if normalisation_factor * gain_peak > 1.0 {
             warn!("Reducing normalisation factor to prevent clipping. Please add negative pregain to avoid.");
-            normalisation_factor = 1.0 / data.track_peak;
+            normalisation_factor = 1.0 / gain_peak;
         }
 
         debug!("Normalisation Data: {:?}", data);
+        debug!("Normalisation Type: {:?}", config.normalisation_type);
         debug!("Applied normalisation factor: {}", normalisation_factor);
 
         normalisation_factor
diff --git a/src/main.rs b/src/main.rs
index 4d3c4f40..4a4b7508 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -22,7 +22,7 @@ use librespot::core::version;
 use librespot::connect::discovery::{discovery, DiscoveryStream};
 use librespot::connect::spirc::{Spirc, SpircTask};
 use librespot::playback::audio_backend::{self, Sink, BACKENDS};
-use librespot::playback::config::{Bitrate, PlayerConfig};
+use librespot::playback::config::{Bitrate, NormalisationType, PlayerConfig};
 use librespot::playback::mixer::{self, Mixer, MixerConfig};
 use librespot::playback::player::{Player, PlayerEvent};
 
@@ -177,6 +177,12 @@ fn setup(args: &[String]) -> Setup {
             "enable-volume-normalisation",
             "Play all tracks at the same volume",
         )
+        .optopt(
+            "",
+            "normalisation-gain-type",
+            "Specify the normalisation gain type to use - [track, album]. Default is track.",
+            "GAIN_TYPE",
+        )
         .optopt(
             "",
             "normalisation-pregain",
@@ -338,10 +344,18 @@ fn setup(args: &[String]) -> Setup {
             .as_ref()
             .map(|bitrate| Bitrate::from_str(bitrate).expect("Invalid bitrate"))
             .unwrap_or(Bitrate::default());
+        let gain_type = matches
+            .opt_str("normalisation-gain-type")
+            .as_ref()
+            .map(|gain_type| {
+                NormalisationType::from_str(gain_type).expect("Invalid normalisation type")
+            })
+            .unwrap_or(NormalisationType::default());
         PlayerConfig {
             bitrate: bitrate,
             gapless: !matches.opt_present("disable-gapless"),
             normalisation: matches.opt_present("enable-volume-normalisation"),
+            normalisation_type: gain_type,
             normalisation_pregain: matches
                 .opt_str("normalisation-pregain")
                 .map(|pregain| pregain.parse::<f32>().expect("Invalid pregain float value"))

From 14a004f84c01642dcb8b5efce2fd20ac8fd45bfa Mon Sep 17 00:00:00 2001
From: johannesd3 <johannesd@outlook.com>
Date: Sat, 23 Jan 2021 22:37:41 +0100
Subject: [PATCH 03/27] Refactored Cache Proper error handling, and moving the
 conversion between { credentials, volume } and file into the cache module

---
 audio/src/fetch.rs         |   4 +-
 core/src/authentication.rs |  29 +--------
 core/src/cache.rs          | 130 +++++++++++++++++++++++++------------
 src/main.rs                |  31 +++++----
 4 files changed, 112 insertions(+), 82 deletions(-)

diff --git a/audio/src/fetch.rs b/audio/src/fetch.rs
index c47cb4d3..c65482bd 100644
--- a/audio/src/fetch.rs
+++ b/audio/src/fetch.rs
@@ -429,8 +429,10 @@ impl AudioFile {
             complete_rx
                 .map(move |mut file| {
                     if let Some(cache) = session_.cache() {
-                        cache.save_file(file_id, &mut file);
                         debug!("File {} complete, saving to cache", file_id);
+                        if let Err(err) = cache.save_file(file_id, &mut file) {
+                            warn!("Cannot save file to cache: {}", err);
+                        }
                     } else {
                         debug!("File {} complete", file_id);
                     }
diff --git a/core/src/authentication.rs b/core/src/authentication.rs
index 36cbd439..9109c7fb 100644
--- a/core/src/authentication.rs
+++ b/core/src/authentication.rs
@@ -1,16 +1,10 @@
 use aes::Aes192;
-use base64;
 use byteorder::{BigEndian, ByteOrder};
 use hmac::Hmac;
 use pbkdf2::pbkdf2;
 use protobuf::ProtobufEnum;
-use serde;
-use serde_json;
 use sha1::{Digest, Sha1};
-use std::fs::File;
-use std::io::{self, Read, Write};
-use std::ops::FnOnce;
-use std::path::Path;
+use std::io::{self, Read};
 
 use crate::protocol::authentication::AuthenticationType;
 
@@ -112,27 +106,6 @@ impl Credentials {
             auth_data: auth_data,
         }
     }
-
-    fn from_reader<R: Read>(mut reader: R) -> Credentials {
-        let mut contents = String::new();
-        reader.read_to_string(&mut contents).unwrap();
-
-        serde_json::from_str(&contents).unwrap()
-    }
-
-    pub(crate) fn from_file<P: AsRef<Path>>(path: P) -> Option<Credentials> {
-        File::open(path).ok().map(Credentials::from_reader)
-    }
-
-    fn save_to_writer<W: Write>(&self, writer: &mut W) {
-        let contents = serde_json::to_string(&self.clone()).unwrap();
-        writer.write_all(contents.as_bytes()).unwrap();
-    }
-
-    pub(crate) fn save_to_file<P: AsRef<Path>>(&self, path: P) {
-        let mut file = File::create(path).unwrap();
-        self.save_to_writer(&mut file)
-    }
 }
 
 fn serialize_protobuf_enum<T, S>(v: &T, ser: S) -> Result<S::Ok, S::Error>
diff --git a/core/src/cache.rs b/core/src/cache.rs
index e711777c..4dcce968 100644
--- a/core/src/cache.rs
+++ b/core/src/cache.rs
@@ -1,9 +1,7 @@
 use std::fs;
 use std::fs::File;
-use std::io;
-use std::io::Read;
-use std::path::Path;
-use std::path::PathBuf;
+use std::io::{self, Error, ErrorKind, Read, Write};
+use std::path::{Path, PathBuf};
 
 use crate::authentication::Credentials;
 use crate::spotify_id::FileId;
@@ -27,51 +25,93 @@ fn mkdir_existing(path: &Path) -> io::Result<()> {
 }
 
 impl Cache {
-    pub fn new(audio_location: PathBuf, system_location: PathBuf, use_audio_cache: bool) -> Cache {
-        if use_audio_cache == true {
-            mkdir_existing(&audio_location).unwrap();
-            mkdir_existing(&audio_location.join("files")).unwrap();
+    pub fn new(
+        audio_location: PathBuf,
+        system_location: PathBuf,
+        use_audio_cache: bool,
+    ) -> io::Result<Cache> {
+        if use_audio_cache {
+            mkdir_existing(&audio_location)?;
+            mkdir_existing(&audio_location.join("files"))?;
         }
-        mkdir_existing(&system_location).unwrap();
+        mkdir_existing(&system_location)?;
 
-        Cache {
+        Ok(Cache {
             audio_root: audio_location,
             system_root: system_location,
-            use_audio_cache: use_audio_cache,
-        }
+            use_audio_cache,
+        })
     }
 }
 
 impl Cache {
-    fn credentials_path(&self) -> PathBuf {
-        self.system_root.join("credentials.json")
+    fn open_credentials_file(&self) -> io::Result<File> {
+        File::open(self.system_root.join("credentials.json"))
+    }
+
+    fn read_credentials(&self) -> io::Result<Credentials> {
+        let mut file = self.open_credentials_file()?;
+        let mut contents = String::new();
+        file.read_to_string(&mut contents)?;
+        serde_json::from_str(&contents).map_err(|e| Error::new(ErrorKind::InvalidData, e))
     }
 
     pub fn credentials(&self) -> Option<Credentials> {
-        let path = self.credentials_path();
-        Credentials::from_file(path)
+        match self.read_credentials() {
+            Ok(c) => Some(c),
+            Err(e) => {
+                if e.kind() != ErrorKind::NotFound {
+                    warn!("Error reading credentials from cache: {}", e);
+                }
+                None
+            }
+        }
     }
 
     pub fn save_credentials(&self, cred: &Credentials) {
-        let path = self.credentials_path();
-        cred.save_to_file(&path);
+        let result = self
+            .open_credentials_file()
+            .and_then(|mut file| write!(file, "{}", serde_json::to_string(cred)?));
+        if let Err(e) = result {
+            warn!("Cannot save credentials to cache: {}", e);
+        }
     }
 }
 
 // cache volume to system_root/volume
 impl Cache {
-    fn volume_path(&self) -> PathBuf {
-        self.system_root.join("volume")
+    fn open_volume_file(&self) -> io::Result<File> {
+        File::open(self.system_root.join("volume"))
     }
 
-    pub fn volume(&self) -> Option<u16> {
-        let path = self.volume_path();
-        Volume::from_file(path)
+    fn read_volume(&self) -> io::Result<Volume> {
+        let mut file = self.open_volume_file()?;
+        let mut contents = String::new();
+        file.read_to_string(&mut contents)?;
+        contents
+            .parse()
+            .map_err(|e| Error::new(ErrorKind::InvalidData, e))
+    }
+
+    pub fn volume(&self) -> Option<Volume> {
+        match self.read_volume() {
+            Ok(v) => Some(v),
+            Err(e) => {
+                if e.kind() != ErrorKind::NotFound {
+                    warn!("Error reading volume from cache: {}", e);
+                }
+                None
+            }
+        }
     }
 
     pub fn save_volume(&self, volume: Volume) {
-        let path = self.volume_path();
-        volume.save_to_file(&path);
+        let result = self
+            .open_volume_file()
+            .and_then(|mut file| write!(file, "{}", volume));
+        if let Err(e) = result {
+            warn!("Cannot save volume to cache: {}", e);
+        }
     }
 }
 
@@ -85,31 +125,39 @@ impl Cache {
     }
 
     pub fn file(&self, file: FileId) -> Option<File> {
-        File::open(self.file_path(file)).ok()
+        File::open(self.file_path(file))
+            .map_err(|e| {
+                if e.kind() != ErrorKind::NotFound {
+                    warn!("Error reading file from cache: {}", e)
+                }
+            })
+            .ok()
     }
 
-    pub fn save_file(&self, file: FileId, contents: &mut dyn Read) {
+    pub fn save_file<F: Read>(&self, file: FileId, contents: &mut F) -> io::Result<()> {
         if self.use_audio_cache {
             let path = self.file_path(file);
-            mkdir_existing(path.parent().unwrap()).unwrap();
+            mkdir_existing(path.parent().unwrap())?;
 
-            let mut cache_file = File::create(path).unwrap_or_else(|_e| {
-                ::std::fs::remove_dir_all(&self.audio_root.join("files")).unwrap();
-                mkdir_existing(&self.audio_root.join("files")).unwrap();
+            let mut cache_file = File::create(path).or_else(|_| {
+                fs::remove_dir_all(&self.audio_root.join("files"))?;
+                mkdir_existing(&self.audio_root.join("files"))?;
 
                 let path = self.file_path(file);
-                mkdir_existing(path.parent().unwrap()).unwrap();
-                File::create(path).unwrap()
-            });
-            ::std::io::copy(contents, &mut cache_file).unwrap_or_else(|_e| {
-                ::std::fs::remove_dir_all(&self.audio_root.join("files")).unwrap();
-                mkdir_existing(&self.audio_root.join("files")).unwrap();
+                mkdir_existing(path.parent().unwrap())?;
+                File::create(path)
+            })?;
+
+            io::copy(contents, &mut cache_file).or_else(|_| {
+                fs::remove_dir_all(&self.audio_root.join("files"))?;
+                mkdir_existing(&self.audio_root.join("files"))?;
 
                 let path = self.file_path(file);
-                mkdir_existing(path.parent().unwrap()).unwrap();
-                let mut file = File::create(path).unwrap();
-                ::std::io::copy(contents, &mut file).unwrap()
-            });
+                mkdir_existing(path.parent().unwrap())?;
+                let mut file = File::create(path)?;
+                io::copy(contents, &mut file)
+            })?;
         }
+        Ok(())
     }
 }
diff --git a/src/main.rs b/src/main.rs
index 4f80657e..8c029f5a 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -254,18 +254,24 @@ fn setup(args: &[String]) -> Setup {
         mapped_volume: !matches.opt_present("mixer-linear-volume"),
     };
 
-    let cache = matches.opt_str("c").map(|cache_path| {
-        let use_audio_cache = !matches.opt_present("disable-audio-cache");
-        let system_cache_directory = matches
-            .opt_str("system-cache")
-            .unwrap_or(String::from(cache_path.clone()));
+    let use_audio_cache = !matches.opt_present("disable-audio-cache");
 
-        Cache::new(
-            PathBuf::from(cache_path),
-            PathBuf::from(system_cache_directory),
-            use_audio_cache,
-        )
-    });
+    let cache_directory = matches.opt_str("c").unwrap_or(String::from(""));
+    let system_cache_directory = matches
+        .opt_str("system-cache")
+        .unwrap_or(String::from(cache_directory.clone()));
+
+    let cache = match Cache::new(
+        PathBuf::from(cache_directory),
+        PathBuf::from(system_cache_directory),
+        use_audio_cache,
+    ) {
+        Ok(cache) => Some(cache),
+        Err(e) => {
+            warn!("Cannot create cache: {}", e);
+            None
+        }
+    };
 
     let initial_volume = matches
         .opt_str("initial-volume")
@@ -276,8 +282,9 @@ fn setup(args: &[String]) -> Setup {
             }
             (volume as i32 * 0xFFFF / 100) as u16
         })
+        .map(Volume)
         .or_else(|| cache.as_ref().and_then(Cache::volume))
-        .unwrap_or(0x8000);
+        .unwrap_or(Volume(0x8000));
 
     let zeroconf_port = matches
         .opt_str("zeroconf-port")

From fa5c9f7d11367e6d298b11e4d4aaad26d5f21472 Mon Sep 17 00:00:00 2001
From: johannesd3 <johannesd@outlook.com>
Date: Mon, 25 Jan 2021 02:22:25 +0100
Subject: [PATCH 04/27] Made locations in cache optional The locations of
 credentials, volume and audio are now stored in three separate
 Optional<PathBuf>s. Removed the clearing of the cache if an error occurs.
 This might be added again later.

---
 audio/src/fetch.rs |   4 +-
 core/src/cache.rs  | 179 ++++++++++++++++++++-------------------------
 src/main.rs        |  42 +++++++----
 3 files changed, 108 insertions(+), 117 deletions(-)

diff --git a/audio/src/fetch.rs b/audio/src/fetch.rs
index c65482bd..bae69419 100644
--- a/audio/src/fetch.rs
+++ b/audio/src/fetch.rs
@@ -430,9 +430,7 @@ impl AudioFile {
                 .map(move |mut file| {
                     if let Some(cache) = session_.cache() {
                         debug!("File {} complete, saving to cache", file_id);
-                        if let Err(err) = cache.save_file(file_id, &mut file) {
-                            warn!("Cannot save file to cache: {}", err);
-                        }
+                        cache.save_file(file_id, &mut file);
                     } else {
                         debug!("File {} complete", file_id);
                     }
diff --git a/core/src/cache.rs b/core/src/cache.rs
index 4dcce968..76d49fa9 100644
--- a/core/src/cache.rs
+++ b/core/src/cache.rs
@@ -7,59 +7,58 @@ use crate::authentication::Credentials;
 use crate::spotify_id::FileId;
 use crate::volume::Volume;
 
+/// A cache for volume, credentials and audio files.
 #[derive(Clone)]
 pub struct Cache {
-    audio_root: PathBuf,
-    system_root: PathBuf,
-    use_audio_cache: bool,
-}
-
-fn mkdir_existing(path: &Path) -> io::Result<()> {
-    fs::create_dir(path).or_else(|err| {
-        if err.kind() == io::ErrorKind::AlreadyExists {
-            Ok(())
-        } else {
-            Err(err)
-        }
-    })
+    credentials_location: Option<PathBuf>,
+    volume_location: Option<PathBuf>,
+    audio_location: Option<PathBuf>,
 }
 
 impl Cache {
-    pub fn new(
-        audio_location: PathBuf,
-        system_location: PathBuf,
-        use_audio_cache: bool,
-    ) -> io::Result<Cache> {
-        if use_audio_cache {
-            mkdir_existing(&audio_location)?;
-            mkdir_existing(&audio_location.join("files"))?;
+    pub fn new<P: AsRef<Path>>(
+        system_location: Option<P>,
+        audio_location: Option<P>,
+    ) -> io::Result<Self> {
+        if let Some(location) = &system_location {
+            fs::create_dir_all(location)?;
         }
-        mkdir_existing(&system_location)?;
 
-        Ok(Cache {
-            audio_root: audio_location,
-            system_root: system_location,
-            use_audio_cache,
-        })
-    }
-}
+        if let Some(location) = &audio_location {
+            fs::create_dir_all(location)?;
+        }
 
-impl Cache {
-    fn open_credentials_file(&self) -> io::Result<File> {
-        File::open(self.system_root.join("credentials.json"))
-    }
+        let audio_location = audio_location.map(|p| p.as_ref().to_owned());
+        let volume_location = system_location.as_ref().map(|p| p.as_ref().join("volume"));
+        let credentials_location = system_location
+            .as_ref()
+            .map(|p| p.as_ref().join("credentials.json"));
 
-    fn read_credentials(&self) -> io::Result<Credentials> {
-        let mut file = self.open_credentials_file()?;
-        let mut contents = String::new();
-        file.read_to_string(&mut contents)?;
-        serde_json::from_str(&contents).map_err(|e| Error::new(ErrorKind::InvalidData, e))
+        let cache = Cache {
+            credentials_location,
+            volume_location,
+            audio_location,
+        };
+
+        Ok(cache)
     }
 
     pub fn credentials(&self) -> Option<Credentials> {
-        match self.read_credentials() {
+        let location = self.credentials_location.as_ref()?;
+
+        // This closure is just convencience to enable the question mark operator
+        let read = || {
+            let mut file = File::open(location)?;
+            let mut contents = String::new();
+            file.read_to_string(&mut contents)?;
+            serde_json::from_str(&contents).map_err(|e| Error::new(ErrorKind::InvalidData, e))
+        };
+
+        match read() {
             Ok(c) => Some(c),
             Err(e) => {
+                // If the file did not exist, the file was probably not written
+                // before. Otherwise, log the error.
                 if e.kind() != ErrorKind::NotFound {
                     warn!("Error reading credentials from cache: {}", e);
                 }
@@ -69,32 +68,31 @@ impl Cache {
     }
 
     pub fn save_credentials(&self, cred: &Credentials) {
-        let result = self
-            .open_credentials_file()
-            .and_then(|mut file| write!(file, "{}", serde_json::to_string(cred)?));
-        if let Err(e) = result {
-            warn!("Cannot save credentials to cache: {}", e);
+        if let Some(location) = &self.credentials_location {
+            let result = File::create(location).and_then(|mut file| {
+                let data = serde_json::to_string(cred)?;
+                write!(file, "{}", data)
+            });
+
+            if let Err(e) = result {
+                warn!("Cannot save credentials to cache: {}", e)
+            }
         }
     }
-}
-
-// cache volume to system_root/volume
-impl Cache {
-    fn open_volume_file(&self) -> io::Result<File> {
-        File::open(self.system_root.join("volume"))
-    }
-
-    fn read_volume(&self) -> io::Result<Volume> {
-        let mut file = self.open_volume_file()?;
-        let mut contents = String::new();
-        file.read_to_string(&mut contents)?;
-        contents
-            .parse()
-            .map_err(|e| Error::new(ErrorKind::InvalidData, e))
-    }
 
     pub fn volume(&self) -> Option<Volume> {
-        match self.read_volume() {
+        let location = self.volume_location.as_ref()?;
+
+        let read = || {
+            let mut file = File::open(location)?;
+            let mut contents = String::new();
+            file.read_to_string(&mut contents)?;
+            contents
+                .parse()
+                .map_err(|e| Error::new(ErrorKind::InvalidData, e))
+        };
+
+        match read() {
             Ok(v) => Some(v),
             Err(e) => {
                 if e.kind() != ErrorKind::NotFound {
@@ -106,26 +104,25 @@ impl Cache {
     }
 
     pub fn save_volume(&self, volume: Volume) {
-        let result = self
-            .open_volume_file()
-            .and_then(|mut file| write!(file, "{}", volume));
-        if let Err(e) = result {
-            warn!("Cannot save volume to cache: {}", e);
+        if let Some(ref location) = self.volume_location {
+            let result = File::create(location).and_then(|mut file| write!(file, "{}", volume));
+            if let Err(e) = result {
+                warn!("Cannot save volume to cache: {}", e);
+            }
         }
     }
-}
 
-impl Cache {
-    fn file_path(&self, file: FileId) -> PathBuf {
-        let name = file.to_base16();
-        self.audio_root
-            .join("files")
-            .join(&name[0..2])
-            .join(&name[2..])
+    fn file_path(&self, file: FileId) -> Option<PathBuf> {
+        self.audio_location.as_ref().map(|location| {
+            let name = file.to_base16();
+            let mut path = location.join(&name[0..2]);
+            path.push(&name[2..]);
+            path
+        })
     }
 
     pub fn file(&self, file: FileId) -> Option<File> {
-        File::open(self.file_path(file))
+        File::open(self.file_path(file)?)
             .map_err(|e| {
                 if e.kind() != ErrorKind::NotFound {
                     warn!("Error reading file from cache: {}", e)
@@ -134,30 +131,16 @@ impl Cache {
             .ok()
     }
 
-    pub fn save_file<F: Read>(&self, file: FileId, contents: &mut F) -> io::Result<()> {
-        if self.use_audio_cache {
-            let path = self.file_path(file);
-            mkdir_existing(path.parent().unwrap())?;
+    pub fn save_file<F: Read>(&self, file: FileId, contents: &mut F) {
+        if let Some(path) = self.file_path(file) {
+            let parent = path.parent().unwrap();
+            let result = fs::create_dir_all(parent)
+                .and_then(|_| File::create(path))
+                .and_then(|mut file| io::copy(contents, &mut file));
 
-            let mut cache_file = File::create(path).or_else(|_| {
-                fs::remove_dir_all(&self.audio_root.join("files"))?;
-                mkdir_existing(&self.audio_root.join("files"))?;
-
-                let path = self.file_path(file);
-                mkdir_existing(path.parent().unwrap())?;
-                File::create(path)
-            })?;
-
-            io::copy(contents, &mut cache_file).or_else(|_| {
-                fs::remove_dir_all(&self.audio_root.join("files"))?;
-                mkdir_existing(&self.audio_root.join("files"))?;
-
-                let path = self.file_path(file);
-                mkdir_existing(path.parent().unwrap())?;
-                let mut file = File::create(path)?;
-                io::copy(contents, &mut file)
-            })?;
+            if let Err(e) = result {
+                warn!("Cannot save file to cache: {}", e)
+            }
         }
-        Ok(())
     }
 }
diff --git a/src/main.rs b/src/main.rs
index 8c029f5a..b22d7d5f 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -5,7 +5,7 @@ use sha1::{Digest, Sha1};
 use std::env;
 use std::io::{self, stderr, Write};
 use std::mem;
-use std::path::PathBuf;
+use std::path::Path;
 use std::process::exit;
 use std::str::FromStr;
 use std::time::Instant;
@@ -254,22 +254,32 @@ fn setup(args: &[String]) -> Setup {
         mapped_volume: !matches.opt_present("mixer-linear-volume"),
     };
 
-    let use_audio_cache = !matches.opt_present("disable-audio-cache");
+    let cache = {
+        let audio_dir;
+        let system_dir;
+        if matches.opt_present("disable-audio-cache") {
+            audio_dir = None;
+            system_dir = matches
+                .opt_str("system-cache")
+                .or_else(|| matches.opt_str("c"))
+                .map(|p| p.into());
+        } else {
+            let cache_dir = matches.opt_str("c");
+            audio_dir = cache_dir
+                .as_ref()
+                .map(|p| AsRef::<Path>::as_ref(p).join("files"));
+            system_dir = matches
+                .opt_str("system-cache")
+                .or_else(|| cache_dir)
+                .map(|p| p.into());
+        }
 
-    let cache_directory = matches.opt_str("c").unwrap_or(String::from(""));
-    let system_cache_directory = matches
-        .opt_str("system-cache")
-        .unwrap_or(String::from(cache_directory.clone()));
-
-    let cache = match Cache::new(
-        PathBuf::from(cache_directory),
-        PathBuf::from(system_cache_directory),
-        use_audio_cache,
-    ) {
-        Ok(cache) => Some(cache),
-        Err(e) => {
-            warn!("Cannot create cache: {}", e);
-            None
+        match Cache::new(system_dir, audio_dir) {
+            Ok(cache) => Some(cache),
+            Err(e) => {
+                warn!("Cannot create cache: {}", e);
+                None
+            }
         }
     };
 

From fd1f04957211c504491864a8fd8cf0fa324dd2f9 Mon Sep 17 00:00:00 2001
From: johannesd3 <johannesd@outlook.com>
Date: Mon, 25 Jan 2021 10:52:06 +0100
Subject: [PATCH 05/27] Removed volume struct

---
 connect/src/spirc.rs |  3 +--
 core/src/cache.rs    |  5 ++---
 core/src/lib.rs      |  1 -
 core/src/volume.rs   | 33 ---------------------------------
 src/main.rs          |  3 +--
 5 files changed, 4 insertions(+), 41 deletions(-)
 delete mode 100644 core/src/volume.rs

diff --git a/connect/src/spirc.rs b/connect/src/spirc.rs
index 5e3ba389..352a3fcf 100644
--- a/connect/src/spirc.rs
+++ b/connect/src/spirc.rs
@@ -21,7 +21,6 @@ use librespot_core::spotify_id::{SpotifyAudioType, SpotifyId, SpotifyIdError};
 use librespot_core::util::url_encode;
 use librespot_core::util::SeqGenerator;
 use librespot_core::version;
-use librespot_core::volume::Volume;
 
 enum SpircPlayStatus {
     Stopped,
@@ -1297,7 +1296,7 @@ impl SpircTask {
         self.mixer
             .set_volume(volume_to_mixer(volume, &self.config.volume_ctrl));
         if let Some(cache) = self.session.cache() {
-            cache.save_volume(Volume { volume })
+            cache.save_volume(volume)
         }
         self.player.emit_volume_set_event(volume);
     }
diff --git a/core/src/cache.rs b/core/src/cache.rs
index 76d49fa9..018c4c25 100644
--- a/core/src/cache.rs
+++ b/core/src/cache.rs
@@ -5,7 +5,6 @@ use std::path::{Path, PathBuf};
 
 use crate::authentication::Credentials;
 use crate::spotify_id::FileId;
-use crate::volume::Volume;
 
 /// A cache for volume, credentials and audio files.
 #[derive(Clone)]
@@ -80,7 +79,7 @@ impl Cache {
         }
     }
 
-    pub fn volume(&self) -> Option<Volume> {
+    pub fn volume(&self) -> Option<u16> {
         let location = self.volume_location.as_ref()?;
 
         let read = || {
@@ -103,7 +102,7 @@ impl Cache {
         }
     }
 
-    pub fn save_volume(&self, volume: Volume) {
+    pub fn save_volume(&self, volume: u16) {
         if let Some(ref location) = self.volume_location {
             let result = File::create(location).and_then(|mut file| write!(file, "{}", volume));
             if let Err(e) = result {
diff --git a/core/src/lib.rs b/core/src/lib.rs
index c65878c2..a00d30bf 100644
--- a/core/src/lib.rs
+++ b/core/src/lib.rs
@@ -54,4 +54,3 @@ pub mod session;
 pub mod spotify_id;
 pub mod util;
 pub mod version;
-pub mod volume;
diff --git a/core/src/volume.rs b/core/src/volume.rs
deleted file mode 100644
index 6b456d1f..00000000
--- a/core/src/volume.rs
+++ /dev/null
@@ -1,33 +0,0 @@
-use std::fs::File;
-use std::io::{Read, Write};
-use std::path::Path;
-
-#[derive(Clone, Copy, Debug)]
-pub struct Volume {
-    pub volume: u16,
-}
-
-impl Volume {
-    // read volume from file
-    fn from_reader<R: Read>(mut reader: R) -> u16 {
-        let mut contents = String::new();
-        reader.read_to_string(&mut contents).unwrap();
-        contents.trim().parse::<u16>().unwrap()
-    }
-
-    pub(crate) fn from_file<P: AsRef<Path>>(path: P) -> Option<u16> {
-        File::open(path).ok().map(Volume::from_reader)
-    }
-
-    // write volume to file
-    fn save_to_writer<W: Write>(&self, writer: &mut W) {
-        writer
-            .write_all(self.volume.to_string().as_bytes())
-            .unwrap();
-    }
-
-    pub(crate) fn save_to_file<P: AsRef<Path>>(&self, path: P) {
-        let mut file = File::create(path).unwrap();
-        self.save_to_writer(&mut file)
-    }
-}
diff --git a/src/main.rs b/src/main.rs
index b22d7d5f..f900f681 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -292,9 +292,8 @@ fn setup(args: &[String]) -> Setup {
             }
             (volume as i32 * 0xFFFF / 100) as u16
         })
-        .map(Volume)
         .or_else(|| cache.as_ref().and_then(Cache::volume))
-        .unwrap_or(Volume(0x8000));
+        .unwrap_or(0x8000);
 
     let zeroconf_port = matches
         .opt_str("zeroconf-port")

From d010cb7999e0420d8d5a0f8e99607523d76ba9b4 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89rico=20Nogueira=20Rolim?=
 <34201958+ericonr@users.noreply.github.com>
Date: Thu, 28 Jan 2021 12:07:33 -0300
Subject: [PATCH 06/27] librespot-audio: update librespot-tremor.

This picks up a fix for librespot-tremor when building with Rust 1.48.
---
 audio/Cargo.toml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/audio/Cargo.toml b/audio/Cargo.toml
index cde907c1..b819abbb 100644
--- a/audio/Cargo.toml
+++ b/audio/Cargo.toml
@@ -22,7 +22,7 @@ num-traits = "0.2"
 tempfile = "3.1"
 aes-ctr = "0.3"
 
-librespot-tremor = { version = "0.1.0", optional = true }
+librespot-tremor = { version = "0.2.0", optional = true }
 vorbis = { version ="0.0.14", optional = true }
 
 [features]

From ed20f357dc64afd62b8e2464e9984d9db31b12e0 Mon Sep 17 00:00:00 2001
From: Johannesd3 <51954457+Johannesd3@users.noreply.github.com>
Date: Fri, 29 Jan 2021 03:01:38 +0100
Subject: [PATCH 07/27] Fix playback in pulseaudio backend (#577)

* Fix playback in pulseaudio backend

* Add comment regarding safety
---
 playback/src/audio_backend/pulseaudio.rs | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/playback/src/audio_backend/pulseaudio.rs b/playback/src/audio_backend/pulseaudio.rs
index e0b9ad9b..6c8d7211 100644
--- a/playback/src/audio_backend/pulseaudio.rs
+++ b/playback/src/audio_backend/pulseaudio.rs
@@ -67,7 +67,11 @@ impl Sink for PulseAudioSink {
 
     fn write(&mut self, data: &[i16]) -> io::Result<()> {
         if let Some(s) = &self.s {
-            let d: &[u8] = unsafe { std::mem::transmute(data) };
+            // SAFETY: An i16 consists of two bytes, so that the given slice can be interpreted
+            // as a byte array of double length. Each byte pointer is validly aligned, and so
+            // is the newly created slice.
+            let d: &[u8] =
+                unsafe { std::slice::from_raw_parts(data.as_ptr() as *const u8, data.len() * 2) };
 
             match s.write(d) {
                 Ok(_) => Ok(()),

From 78614c9d7ac30927c4c41c8827526c0de8fb32a6 Mon Sep 17 00:00:00 2001
From: johannesd3 <johannesd@outlook.com>
Date: Tue, 26 Jan 2021 11:59:09 +0100
Subject: [PATCH 08/27] Bump lewton to 0.10

---
 Cargo.lock       | 2571 +++++++++++++++++++++++-----------------------
 audio/Cargo.toml |    2 +-
 2 files changed, 1293 insertions(+), 1280 deletions(-)

diff --git a/Cargo.lock b/Cargo.lock
index c4fc5c43..c2e3aa68 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -4,3504 +4,3517 @@
 name = "addr2line"
 version = "0.14.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7c0929d69e78dd9bf5408269919fcbcaeb2e35e5d43e5815517cdc6a8e11a423"
 dependencies = [
- "gimli 0.23.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "gimli",
 ]
 
 [[package]]
 name = "adler"
 version = "0.2.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ee2a4ec343196209d6594e19543ae87a39f96d5534d7174822a3ad825dd6ed7e"
 
 [[package]]
 name = "adler32"
 version = "1.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "aae1277d39aeec15cb388266ecc24b11c80469deae6067e17a1a7aa9e5c1f234"
 
 [[package]]
 name = "aes"
 version = "0.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "54eb1d8fe354e5fc611daf4f2ea97dd45a765f4f1e4512306ec183ae2e8f20c9"
 dependencies = [
- "aes-soft 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "aesni 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "block-cipher-trait 0.6.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "aes-soft",
+ "aesni",
+ "block-cipher-trait",
 ]
 
 [[package]]
 name = "aes-ctr"
 version = "0.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d2e5b0458ea3beae0d1d8c0f3946564f8e10f90646cf78c06b4351052058d1ee"
 dependencies = [
- "aes-soft 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "aesni 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "ctr 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "stream-cipher 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "aes-soft",
+ "aesni",
+ "ctr",
+ "stream-cipher",
 ]
 
 [[package]]
 name = "aes-soft"
 version = "0.3.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cfd7e7ae3f9a1fb5c03b389fc6bb9a51400d0c13053f0dca698c832bfd893a0d"
 dependencies = [
- "block-cipher-trait 0.6.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "byteorder 1.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
- "opaque-debug 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "block-cipher-trait",
+ "byteorder",
+ "opaque-debug",
 ]
 
 [[package]]
 name = "aesni"
 version = "0.6.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2f70a6b5f971e473091ab7cfb5ffac6cde81666c4556751d8d5620ead8abf100"
 dependencies = [
- "block-cipher-trait 0.6.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "opaque-debug 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "stream-cipher 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "block-cipher-trait",
+ "opaque-debug",
+ "stream-cipher",
 ]
 
 [[package]]
 name = "alsa"
 version = "0.2.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b4a0d4ebc8b23041c5de9bc9aee13b4bad844a589479701f31a5934cfe4aeb32"
 dependencies = [
- "alsa-sys 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "bitflags 0.9.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.73 (registry+https://github.com/rust-lang/crates.io-index)",
- "nix 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "alsa-sys 0.1.2",
+ "bitflags 0.9.1",
+ "libc",
+ "nix 0.9.0",
 ]
 
 [[package]]
 name = "alsa"
 version = "0.4.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "eb213f6b3e4b1480a60931ca2035794aa67b73103d254715b1db7b70dcb3c934"
 dependencies = [
- "alsa-sys 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "bitflags 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.73 (registry+https://github.com/rust-lang/crates.io-index)",
- "nix 0.15.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "alsa-sys 0.3.0",
+ "bitflags 1.2.1",
+ "libc",
+ "nix 0.15.0",
 ]
 
 [[package]]
 name = "alsa-sys"
 version = "0.1.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b0edcbbf9ef68f15ae1b620f722180b82a98b6f0628d30baa6b8d2a5abc87d58"
 dependencies = [
- "libc 0.2.73 (registry+https://github.com/rust-lang/crates.io-index)",
- "pkg-config 0.3.18 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc",
+ "pkg-config",
 ]
 
 [[package]]
 name = "alsa-sys"
 version = "0.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d5a0559bcd3f7a482690d98be41c08a43e92f669b179433e95ddf5e8b8fd36a3"
 dependencies = [
- "libc 0.2.73 (registry+https://github.com/rust-lang/crates.io-index)",
- "pkg-config 0.3.18 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc",
+ "pkg-config",
 ]
 
 [[package]]
 name = "anyhow"
 version = "1.0.35"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2c0df63cb2955042487fad3aefd2c6e3ae7389ac5dc1beb28921de0b69f779d4"
 
 [[package]]
 name = "arc-swap"
 version = "0.4.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4d25d88fd6b8041580a654f9d0c581a047baee2b3efee13275f2fc392fc75034"
 
 [[package]]
 name = "ascii"
 version = "0.9.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "eab1c04a571841102f5345a8fc0f6bb3d31c315dec879b5c6e42e40ce7ffa34e"
 
 [[package]]
 name = "atty"
 version = "0.2.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d9b39be18770d11421cdb1b9947a45dd3f37e93092cbf377614828a319d5fee8"
 dependencies = [
- "hermit-abi 0.1.15 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.73 (registry+https://github.com/rust-lang/crates.io-index)",
- "winapi 0.3.9 (registry+https://github.com/rust-lang/crates.io-index)",
+ "hermit-abi",
+ "libc",
+ "winapi 0.3.9",
 ]
 
 [[package]]
 name = "autocfg"
 version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f8aac770f1885fd7e387acedd76065302551364496e46b3dd00860b2f8359b9d"
 
 [[package]]
 name = "backtrace"
 version = "0.3.55"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ef5140344c85b01f9bbb4d4b7288a8aa4b3287ccef913a14bcc78a1063623598"
 dependencies = [
- "addr2line 0.14.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "cfg-if 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.73 (registry+https://github.com/rust-lang/crates.io-index)",
- "miniz_oxide 0.4.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "object 0.22.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "rustc-demangle 0.1.18 (registry+https://github.com/rust-lang/crates.io-index)",
+ "addr2line",
+ "cfg-if 1.0.0",
+ "libc",
+ "miniz_oxide",
+ "object",
+ "rustc-demangle",
 ]
 
 [[package]]
 name = "base64"
 version = "0.9.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "489d6c0ed21b11d038c31b6ceccca973e65d73ba3bd8ecb9a2babf5546164643"
 dependencies = [
- "byteorder 1.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
- "safemem 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "byteorder",
+ "safemem",
 ]
 
 [[package]]
 name = "base64"
 version = "0.10.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0b25d992356d2eb0ed82172f5248873db5560c4721f564b13cb5193bda5e668e"
 dependencies = [
- "byteorder 1.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "byteorder",
 ]
 
 [[package]]
 name = "base64"
 version = "0.11.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b41b7ea54a0c9d92199de89e20e58d49f02f8e699814ef3fdf266f6f748d15c7"
 
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diff --git a/audio/Cargo.toml b/audio/Cargo.toml
index cde907c1..9ddfc048 100644
--- a/audio/Cargo.toml
+++ b/audio/Cargo.toml
@@ -15,7 +15,7 @@ bit-set = "0.5"
 byteorder = "1.3"
 bytes = "0.4"
 futures = "0.1"
-lewton = "0.9"
+lewton = "0.10"
 log = "0.4"
 num-bigint = "0.3"
 num-traits = "0.2"

From 6b0983611750e55346cb4f5c27d3b5470eb6a98f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Micha=C5=82=20Chojnacki?= <m.chojnacki@muyo.io>
Date: Fri, 10 Apr 2020 16:00:42 +0200
Subject: [PATCH 09/27] Refactor SpotifyId

- perf:
  * base62 encoding is an order of magnitude faster (~20x);
  * base16/62 enc/dec and from_uri are several times faster (~2-20x);
  * Let FileId::to_base16() reuse the hex encoder (~20x);

- changes:
  * Add to_uri() method;
  * Make from_uri() error handling consistent;
  * Move audio type from string matching to a SpotifyAudioType factory (private);
  * Implent From/Into<&str> for SpotifyAudioType;
  * Add representation sizes as associated constants (private);

- cs/docs:
  * Add rudimentary docs for most public funcs;
  * Add trivial test cases for the codecs;
---
 core/src/spotify_id.rs | 424 ++++++++++++++++++++++++++++++++++-------
 1 file changed, 360 insertions(+), 64 deletions(-)

diff --git a/core/src/spotify_id.rs b/core/src/spotify_id.rs
index 0982f9cb..6adc0206 100644
--- a/core/src/spotify_id.rs
+++ b/core/src/spotify_id.rs
@@ -8,6 +8,44 @@ pub enum SpotifyAudioType {
     NonPlayable,
 }
 
+impl SpotifyAudioType {
+    fn from_str(src: &str) -> SpotifyAudioType {
+        match src {
+            "track" => SpotifyAudioType::Track,
+            "episode" => SpotifyAudioType::Podcast,
+            _ => SpotifyAudioType::NonPlayable,
+        }
+    }
+
+    fn to_str(self) -> &'static str {
+        match self {
+            SpotifyAudioType::Track => "track",
+            SpotifyAudioType::Podcast => "episode",
+            SpotifyAudioType::NonPlayable => "unknown",
+        }
+    }
+
+    fn len(self) -> usize {
+        match self {
+            SpotifyAudioType::Track => 5,
+            SpotifyAudioType::Podcast => 7,
+            SpotifyAudioType::NonPlayable => 7,
+        }
+    }
+}
+
+impl std::convert::From<&str> for SpotifyAudioType {
+    fn from(v: &str) -> Self {
+        SpotifyAudioType::from_str(v)
+    }
+}
+
+impl std::convert::Into<&str> for SpotifyAudioType {
+    fn into(self) -> &'static str {
+        self.to_str()
+    }
+}
+
 #[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
 pub struct SpotifyId {
     pub id: u128,
@@ -17,104 +55,184 @@ pub struct SpotifyId {
 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
 pub struct SpotifyIdError;
 
-const BASE62_DIGITS: &'static [u8] =
-    b"0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
-const BASE16_DIGITS: &'static [u8] = b"0123456789abcdef";
+const BASE62_DIGITS: &[u8; 62] = b"0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
+const BASE16_DIGITS: &[u8; 16] = b"0123456789abcdef";
 
 impl SpotifyId {
+    const SIZE: usize = 16;
+    const SIZE_BASE16: usize = 32;
+    const SIZE_BASE62: usize = 22;
+
     fn as_track(n: u128) -> SpotifyId {
         SpotifyId {
-            id: n.to_owned(),
+            id: n,
             audio_type: SpotifyAudioType::Track,
         }
     }
 
-    pub fn from_base16(id: &str) -> Result<SpotifyId, SpotifyIdError> {
-        let data = id.as_bytes();
+    /// Parses a base16 (hex) encoded [Spotify ID] into a `SpotifyId`.
+    ///
+    /// `src` is expected to be 32 bytes long and encoded using valid characters.
+    ///
+    /// [Spotify ID]: https://developer.spotify.com/documentation/web-api/#spotify-uris-and-ids
+    pub fn from_base16(src: &str) -> Result<SpotifyId, SpotifyIdError> {
+        let mut dst: u128 = 0;
 
-        let mut n = 0u128;
-        for c in data {
-            let d = match BASE16_DIGITS.iter().position(|e| e == c) {
-                None => return Err(SpotifyIdError),
-                Some(x) => x as u128,
-            };
-            n = n * 16;
-            n = n + d;
+        for c in src.as_bytes() {
+            let p = match c {
+                b'0'..=b'9' => c - b'0',
+                b'a'..=b'f' => c - b'a' + 10,
+                _ => return Err(SpotifyIdError),
+            } as u128;
+
+            dst <<= 4;
+            dst += p;
         }
 
-        Ok(SpotifyId::as_track(n))
+        Ok(SpotifyId::as_track(dst))
     }
 
-    pub fn from_base62(id: &str) -> Result<SpotifyId, SpotifyIdError> {
-        let data = id.as_bytes();
+    /// Parses a base62 encoded [Spotify ID] into a `SpotifyId`.
+    ///
+    /// `src` is expected to be 22 bytes long and encoded using valid characters.
+    ///
+    /// [Spotify ID]: https://developer.spotify.com/documentation/web-api/#spotify-uris-and-ids
+    pub fn from_base62(src: &str) -> Result<SpotifyId, SpotifyIdError> {
+        let mut dst: u128 = 0;
 
-        let mut n = 0u128;
-        for c in data {
-            let d = match BASE62_DIGITS.iter().position(|e| e == c) {
-                None => return Err(SpotifyIdError),
-                Some(x) => x as u128,
-            };
-            n = n * 62;
-            n = n + d;
+        for c in src.as_bytes() {
+            let p = match c {
+                b'0'..=b'9' => c - b'0',
+                b'a'..=b'z' => c - b'a' + 10,
+                b'A'..=b'Z' => c - b'A' + 36,
+                _ => return Err(SpotifyIdError),
+            } as u128;
+
+            dst *= 62;
+            dst += p;
         }
-        Ok(SpotifyId::as_track(n))
+
+        Ok(SpotifyId::as_track(dst))
     }
 
-    pub fn from_raw(data: &[u8]) -> Result<SpotifyId, SpotifyIdError> {
-        if data.len() != 16 {
+    /// Creates a `SpotifyId` from a copy of `SpotifyId::SIZE` (16) bytes in big-endian order.
+    ///
+    /// The resulting `SpotifyId` will default to a `SpotifyAudioType::TRACK`.
+    pub fn from_raw(src: &[u8]) -> Result<SpotifyId, SpotifyIdError> {
+        if src.len() != SpotifyId::SIZE {
             return Err(SpotifyIdError);
         };
 
-        let mut arr: [u8; 16] = Default::default();
-        arr.copy_from_slice(&data[0..16]);
+        let mut dst = [0u8; SpotifyId::SIZE];
+        dst.copy_from_slice(src);
 
-        Ok(SpotifyId::as_track(u128::from_be_bytes(arr)))
+        Ok(SpotifyId::as_track(u128::from_be_bytes(dst)))
     }
 
-    pub fn from_uri(uri: &str) -> Result<SpotifyId, SpotifyIdError> {
-        let parts = uri.split(":").collect::<Vec<&str>>();
-        let gid = parts.last().unwrap();
-        if uri.contains(":episode:") {
-            let mut spotify_id = SpotifyId::from_base62(gid).unwrap();
-            let _ = std::mem::replace(&mut spotify_id.audio_type, SpotifyAudioType::Podcast);
-            Ok(spotify_id)
-        } else if uri.contains(":track:") {
-            SpotifyId::from_base62(gid)
-        } else {
-            // show/playlist/artist/album/??
-            let mut spotify_id = SpotifyId::from_base62(gid).unwrap();
-            let _ = std::mem::replace(&mut spotify_id.audio_type, SpotifyAudioType::NonPlayable);
-            Ok(spotify_id)
+    /// Parses a [Spotify URI] into a `SpotifyId`.
+    ///
+    /// `uri` is expected to be in the canonical form `spotify:{type}:{id}`, where `{type}`
+    /// can be arbitrary while `{id}` is a 22-character long, base62 encoded Spotify ID.
+    ///
+    /// [Spotify URI]: https://developer.spotify.com/documentation/web-api/#spotify-uris-and-ids
+    pub fn from_uri(src: &str) -> Result<SpotifyId, SpotifyIdError> {
+        // We expect the ID to be the last colon-delimited item in the URI.
+        let b = src.as_bytes();
+        let id_i = b.len() - SpotifyId::SIZE_BASE62;
+        if b[id_i - 1] != b':' {
+            return Err(SpotifyIdError);
         }
+
+        let mut id = match SpotifyId::from_base62(&src[id_i..]) {
+            Ok(v) => v,
+            Err(e) => return Err(e),
+        };
+
+        // Slice offset by 8 as we are skipping the "spotify:" prefix.
+        id.audio_type = src[8..id_i - 1].into();
+
+        Ok(id)
     }
 
+    /// Returns the `SpotifyId` as a base16 (hex) encoded, `SpotifyId::SIZE_BASE62` (22)
+    /// character long `String`.
     pub fn to_base16(&self) -> String {
-        format!("{:032x}", self.id)
+        to_base16(&self.to_raw(), &mut [0u8; SpotifyId::SIZE_BASE16])
     }
 
+    /// Returns the `SpotifyId` as a [canonically] base62 encoded, `SpotifyId::SIZE_BASE62` (22)
+    /// character long `String`.
+    ///
+    /// [canonically]: https://developer.spotify.com/documentation/web-api/#spotify-uris-and-ids
     pub fn to_base62(&self) -> String {
-        let &SpotifyId { id: mut n, .. } = self;
+        let mut dst = [0u8; 22];
+        let mut i = 0;
+        let n = self.id;
 
-        let mut data = [0u8; 22];
-        for i in 0..22 {
-            data[21 - i] = BASE62_DIGITS[(n % 62) as usize];
-            n /= 62;
+        // The algorithm is based on:
+        // https://github.com/trezor/trezor-crypto/blob/c316e775a2152db255ace96b6b65ac0f20525ec0/base58.c
+        //
+        // We are not using naive division of self.id as it is an u128 and div + mod are software
+        // emulated at runtime (and unoptimized into mul + shift) on non-128bit platforms,
+        // making them very expensive.
+        //
+        // Trezor's algorithm allows us to stick to arithmetic on native registers making this
+        // an order of magnitude faster. Additionally, as our sizes are known, instead of
+        // dealing with the ID on a byte by byte basis, we decompose it into four u32s and
+        // use 64-bit arithmetic on them for an additional speedup.
+        for shift in &[96, 64, 32, 0] {
+            let mut carry = (n >> shift) as u32 as u64;
+
+            for b in &mut dst[..i] {
+                carry += (*b as u64) << 32;
+                *b = (carry % 62) as u8;
+                carry /= 62;
+            }
+
+            while carry > 0 {
+                dst[i] = (carry % 62) as u8;
+                carry /= 62;
+                i += 1;
+            }
         }
 
-        std::str::from_utf8(&data).unwrap().to_owned()
-    }
+        for b in &mut dst {
+            *b = BASE62_DIGITS[*b as usize];
+        }
 
-    pub fn to_uri(&self) -> String {
-        match self.audio_type {
-            SpotifyAudioType::Track => format!("spotify:track:{}", self.to_base62()),
-            SpotifyAudioType::Podcast => format!("spotify:episode:{}", self.to_base62()),
-            SpotifyAudioType::NonPlayable => format!("spotify:unknown:{}", self.to_base62()),
+        dst.reverse();
+
+        unsafe {
+            // Safety: We are only dealing with ASCII characters.
+            String::from_utf8_unchecked(dst.to_vec())
         }
     }
 
-    pub fn to_raw(&self) -> [u8; 16] {
+    /// Returns a copy of the `SpotifyId` as an array of `SpotifyId::SIZE` (16) bytes in
+    /// big-endian order.
+    pub fn to_raw(&self) -> [u8; SpotifyId::SIZE] {
         self.id.to_be_bytes()
     }
+
+    /// Returns the `SpotifyId` as a [Spotify URI] in the canonical form `spotify:{type}:{id}`,
+    /// where `{type}` is an arbitrary string and `{id}` is a 22-character long, base62 encoded
+    /// Spotify ID.
+    ///
+    /// If the `SpotifyId` has an associated type unrecognized by the library, `{type}` will
+    /// be encoded as `unknown`.
+    ///
+    /// [Spotify URI]: https://developer.spotify.com/documentation/web-api/#spotify-uris-and-ids
+    pub fn to_uri(&self) -> String {
+        // 8 chars for the "spotify:" prefix + 1 colon + 22 chars base62 encoded ID  = 31
+        // + unknown size audio_type.
+        let mut dst = String::with_capacity(31 + self.audio_type.len());
+        dst.push_str("spotify:");
+        dst.push_str(self.audio_type.into());
+        dst.push_str(":");
+        dst.push_str(&self.to_base62());
+
+        dst
+    }
 }
 
 #[derive(Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
@@ -122,11 +240,7 @@ pub struct FileId(pub [u8; 20]);
 
 impl FileId {
     pub fn to_base16(&self) -> String {
-        self.0
-            .iter()
-            .map(|b| format!("{:02x}", b))
-            .collect::<Vec<String>>()
-            .concat()
+        to_base16(&self.0, &mut [0u8; 40])
     }
 }
 
@@ -141,3 +255,185 @@ impl fmt::Display for FileId {
         f.write_str(&self.to_base16())
     }
 }
+
+#[inline]
+fn to_base16(src: &[u8], buf: &mut [u8]) -> String {
+    let mut i = 0;
+    for v in src {
+        buf[i] = BASE16_DIGITS[(v >> 4) as usize];
+        buf[i + 1] = BASE16_DIGITS[(v & 0x0f) as usize];
+        i += 2;
+    }
+
+    unsafe {
+        // Safety: We are only dealing with ASCII characters.
+        String::from_utf8_unchecked(buf.to_vec())
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    struct ConversionCase {
+        id: u128,
+        kind: SpotifyAudioType,
+        uri: &'static str,
+        base16: &'static str,
+        base62: &'static str,
+        raw: &'static [u8],
+    }
+
+    static CONV_VALID: [ConversionCase; 4] = [
+        ConversionCase {
+            id: 238762092608182713602505436543891614649,
+            kind: SpotifyAudioType::Track,
+            uri: "spotify:track:5sWHDYs0csV6RS48xBl0tH",
+            base16: "b39fe8081e1f4c54be38e8d6f9f12bb9",
+            base62: "5sWHDYs0csV6RS48xBl0tH",
+            raw: &[
+                179, 159, 232, 8, 30, 31, 76, 84, 190, 56, 232, 214, 249, 241, 43, 185,
+            ],
+        },
+        ConversionCase {
+            id: 204841891221366092811751085145916697048,
+            kind: SpotifyAudioType::Track,
+            uri: "spotify:track:4GNcXTGWmnZ3ySrqvol3o4",
+            base16: "9a1b1cfbc6f244569ae0356c77bbe9d8",
+            base62: "4GNcXTGWmnZ3ySrqvol3o4",
+            raw: &[
+                154, 27, 28, 251, 198, 242, 68, 86, 154, 224, 53, 108, 119, 187, 233, 216,
+            ],
+        },
+        ConversionCase {
+            id: 204841891221366092811751085145916697048,
+            kind: SpotifyAudioType::Podcast,
+            uri: "spotify:episode:4GNcXTGWmnZ3ySrqvol3o4",
+            base16: "9a1b1cfbc6f244569ae0356c77bbe9d8",
+            base62: "4GNcXTGWmnZ3ySrqvol3o4",
+            raw: &[
+                154, 27, 28, 251, 198, 242, 68, 86, 154, 224, 53, 108, 119, 187, 233, 216,
+            ],
+        },
+        ConversionCase {
+            id: 204841891221366092811751085145916697048,
+            kind: SpotifyAudioType::NonPlayable,
+            uri: "spotify:unknown:4GNcXTGWmnZ3ySrqvol3o4",
+            base16: "9a1b1cfbc6f244569ae0356c77bbe9d8",
+            base62: "4GNcXTGWmnZ3ySrqvol3o4",
+            raw: &[
+                154, 27, 28, 251, 198, 242, 68, 86, 154, 224, 53, 108, 119, 187, 233, 216,
+            ],
+        },
+    ];
+
+    static CONV_INVALID: [ConversionCase; 2] = [
+        ConversionCase {
+            id: 0,
+            kind: SpotifyAudioType::NonPlayable,
+            // Invalid ID in the URI.
+            uri: "spotify:arbitrarywhatever:5sWHDYs0Bl0tH",
+            base16: "ZZZZZ8081e1f4c54be38e8d6f9f12bb9",
+            base62: "!!!!!Ys0csV6RS48xBl0tH",
+            raw: &[
+                // Invalid length.
+                154, 27, 28, 251, 198, 242, 68, 86, 154, 224, 5, 3, 108, 119, 187, 233, 216, 255,
+            ],
+        },
+        ConversionCase {
+            id: 0,
+            kind: SpotifyAudioType::NonPlayable,
+            // Missing colon between ID and type.
+            uri: "spotify:arbitrarywhatever5sWHDYs0csV6RS48xBl0tH",
+            base16: "--------------------",
+            base62: "....................",
+            raw: &[
+                // Invalid length.
+                154, 27, 28, 251,
+            ],
+        },
+    ];
+
+    #[test]
+    fn from_base62() {
+        for c in &CONV_VALID {
+            assert_eq!(SpotifyId::from_base62(c.base62).unwrap().id, c.id);
+        }
+
+        for c in &CONV_INVALID {
+            assert_eq!(SpotifyId::from_base62(c.base62), Err(SpotifyIdError));
+        }
+    }
+
+    #[test]
+    fn to_base62() {
+        for c in &CONV_VALID {
+            let id = SpotifyId {
+                id: c.id,
+                audio_type: c.kind,
+            };
+
+            assert_eq!(id.to_base62(), c.base62);
+        }
+    }
+
+    #[test]
+    fn from_base16() {
+        for c in &CONV_VALID {
+            assert_eq!(SpotifyId::from_base16(c.base16).unwrap().id, c.id);
+        }
+
+        for c in &CONV_INVALID {
+            assert_eq!(SpotifyId::from_base16(c.base16), Err(SpotifyIdError));
+        }
+    }
+
+    #[test]
+    fn to_base16() {
+        for c in &CONV_VALID {
+            let id = SpotifyId {
+                id: c.id,
+                audio_type: c.kind,
+            };
+
+            assert_eq!(id.to_base16(), c.base16);
+        }
+    }
+
+    #[test]
+    fn from_uri() {
+        for c in &CONV_VALID {
+            let actual = SpotifyId::from_uri(c.uri).unwrap();
+
+            assert_eq!(actual.id, c.id);
+            assert_eq!(actual.audio_type, c.kind);
+        }
+
+        for c in &CONV_INVALID {
+            assert_eq!(SpotifyId::from_uri(c.uri), Err(SpotifyIdError));
+        }
+    }
+
+    #[test]
+    fn to_uri() {
+        for c in &CONV_VALID {
+            let id = SpotifyId {
+                id: c.id,
+                audio_type: c.kind,
+            };
+
+            assert_eq!(id.to_uri(), c.uri);
+        }
+    }
+
+    #[test]
+    fn from_raw() {
+        for c in &CONV_VALID {
+            assert_eq!(SpotifyId::from_raw(c.raw).unwrap().id, c.id);
+        }
+
+        for c in &CONV_INVALID {
+            assert_eq!(SpotifyId::from_raw(c.raw), Err(SpotifyIdError));
+        }
+    }
+}

From e582f0a3fc373df0cb216fbf79b81fe4c4a9aa19 Mon Sep 17 00:00:00 2001
From: johannesd3 <johannesd@outlook.com>
Date: Fri, 29 Jan 2021 11:50:50 +0100
Subject: [PATCH 10/27] Improved SpotifyId implementation Moved conversion of
 SpotifyAudioType from and to &str directly to traits Used a simpler and more
 idiomatic syntax in some places.

---
 core/src/spotify_id.rs | 56 ++++++++++++------------------------------
 1 file changed, 16 insertions(+), 40 deletions(-)

diff --git a/core/src/spotify_id.rs b/core/src/spotify_id.rs
index 6adc0206..17327b47 100644
--- a/core/src/spotify_id.rs
+++ b/core/src/spotify_id.rs
@@ -1,4 +1,4 @@
-use std;
+use std::convert::TryInto;
 use std::fmt;
 
 #[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
@@ -8,42 +8,24 @@ pub enum SpotifyAudioType {
     NonPlayable,
 }
 
-impl SpotifyAudioType {
-    fn from_str(src: &str) -> SpotifyAudioType {
-        match src {
+impl From<&str> for SpotifyAudioType {
+    fn from(v: &str) -> Self {
+        match v {
             "track" => SpotifyAudioType::Track,
             "episode" => SpotifyAudioType::Podcast,
             _ => SpotifyAudioType::NonPlayable,
         }
     }
+}
 
-    fn to_str(self) -> &'static str {
+impl Into<&str> for SpotifyAudioType {
+    fn into(self) -> &'static str {
         match self {
             SpotifyAudioType::Track => "track",
             SpotifyAudioType::Podcast => "episode",
             SpotifyAudioType::NonPlayable => "unknown",
         }
     }
-
-    fn len(self) -> usize {
-        match self {
-            SpotifyAudioType::Track => 5,
-            SpotifyAudioType::Podcast => 7,
-            SpotifyAudioType::NonPlayable => 7,
-        }
-    }
-}
-
-impl std::convert::From<&str> for SpotifyAudioType {
-    fn from(v: &str) -> Self {
-        SpotifyAudioType::from_str(v)
-    }
-}
-
-impl std::convert::Into<&str> for SpotifyAudioType {
-    fn into(self) -> &'static str {
-        self.to_str()
-    }
 }
 
 #[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
@@ -119,14 +101,10 @@ impl SpotifyId {
     ///
     /// The resulting `SpotifyId` will default to a `SpotifyAudioType::TRACK`.
     pub fn from_raw(src: &[u8]) -> Result<SpotifyId, SpotifyIdError> {
-        if src.len() != SpotifyId::SIZE {
-            return Err(SpotifyIdError);
-        };
-
-        let mut dst = [0u8; SpotifyId::SIZE];
-        dst.copy_from_slice(src);
-
-        Ok(SpotifyId::as_track(u128::from_be_bytes(dst)))
+        match src.try_into() {
+            Ok(dst) => Ok(SpotifyId::as_track(u128::from_be_bytes(dst))),
+            Err(_) => Err(SpotifyIdError),
+        }
     }
 
     /// Parses a [Spotify URI] into a `SpotifyId`.
@@ -143,10 +121,7 @@ impl SpotifyId {
             return Err(SpotifyIdError);
         }
 
-        let mut id = match SpotifyId::from_base62(&src[id_i..]) {
-            Ok(v) => v,
-            Err(e) => return Err(e),
-        };
+        let mut id = SpotifyId::from_base62(&src[id_i..])?;
 
         // Slice offset by 8 as we are skipping the "spotify:" prefix.
         id.audio_type = src[8..id_i - 1].into();
@@ -225,10 +200,11 @@ impl SpotifyId {
     pub fn to_uri(&self) -> String {
         // 8 chars for the "spotify:" prefix + 1 colon + 22 chars base62 encoded ID  = 31
         // + unknown size audio_type.
-        let mut dst = String::with_capacity(31 + self.audio_type.len());
+        let audio_type: &str = self.audio_type.into();
+        let mut dst = String::with_capacity(31 + audio_type.len());
         dst.push_str("spotify:");
-        dst.push_str(self.audio_type.into());
-        dst.push_str(":");
+        dst.push_str(audio_type);
+        dst.push(':');
         dst.push_str(&self.to_base62());
 
         dst

From 318c499dc579dbeb106687df9d208af90f05f649 Mon Sep 17 00:00:00 2001
From: Sasha Hilton <sashahilton00@gmail.com>
Date: Sat, 30 Jan 2021 02:31:16 +0000
Subject: [PATCH 11/27] Change opt message to reflect default selection
 accurately.

---
 src/main.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/main.rs b/src/main.rs
index 4a4b7508..9eeb11b0 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -180,7 +180,7 @@ fn setup(args: &[String]) -> Setup {
         .optopt(
             "",
             "normalisation-gain-type",
-            "Specify the normalisation gain type to use - [track, album]. Default is track.",
+            "Specify the normalisation gain type to use - [track, album]. Default is album.",
             "GAIN_TYPE",
         )
         .optopt(

From 9ad68dfb7632123e9f0ed8beb4bb5919122e21a1 Mon Sep 17 00:00:00 2001
From: Sasha Hilton <sashahilton00@gmail.com>
Date: Sun, 31 Jan 2021 01:36:10 +0000
Subject: [PATCH 12/27] Remove depreciated error description method

---
 audio/src/libvorbis_decoder.rs | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/audio/src/libvorbis_decoder.rs b/audio/src/libvorbis_decoder.rs
index c2198251..48be2b86 100644
--- a/audio/src/libvorbis_decoder.rs
+++ b/audio/src/libvorbis_decoder.rs
@@ -73,10 +73,6 @@ impl fmt::Display for VorbisError {
 }
 
 impl error::Error for VorbisError {
-    fn description(&self) -> &str {
-        error::Error::description(&self.0)
-    }
-
     fn source(&self) -> Option<&(dyn error::Error + 'static)> {
         error::Error::source(&self.0)
     }

From 4a97108c8c94076bbbd303ee0fcc9e017ec85068 Mon Sep 17 00:00:00 2001
From: Sasha Hilton <sashahilton00@gmail.com>
Date: Sun, 31 Jan 2021 01:38:56 +0000
Subject: [PATCH 13/27] Update librespot-tremor Cargo.lock dependency

---
 Cargo.lock | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/Cargo.lock b/Cargo.lock
index c2e3aa68..80d16f89 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1566,9 +1566,9 @@ dependencies = [
 
 [[package]]
 name = "librespot-tremor"
-version = "0.1.0"
+version = "0.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b155a7dc4e4d272e01c37a1b85c1ee1bee7f04980ad4a7784c1a6e0f2de5929b"
+checksum = "97f525bff915d478a76940a7b988e5ea34911ba7280c97bd3a7673f54d68b4fe"
 dependencies = [
  "cc",
  "libc",

From fb9720d3c2590e8092818e18877a9b5db2584a11 Mon Sep 17 00:00:00 2001
From: Sasha Hilton <sashahilton00@gmail.com>
Date: Sun, 31 Jan 2021 01:55:47 +0000
Subject: [PATCH 14/27] Cache build dependencies in Github Workflows

---
 .github/workflows/test.yml | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 77e280b2..c0ccff2c 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -59,6 +59,15 @@ jobs:
           profile: minimal
           toolchain: ${{ matrix.toolchain }}
           override: true
+      - name: Cache Rust dependencies
+        uses: actions/cache@v2
+        with:
+          path: |
+            ~/.cargo/registry/index
+            ~/.cargo/registry/cache
+            ~/.cargo/git
+            target
+          key: ${{ runner.os }}-build-${{ hashFiles('**/lockfiles') }}
       - name: Install developer package dependencies
         run: sudo apt-get update && sudo apt-get install libpulse-dev portaudio19-dev libasound2-dev libsdl2-dev gstreamer1.0-dev libgstreamer-plugins-base1.0-dev
       - run: cargo build --locked --no-default-features
@@ -94,6 +103,15 @@ jobs:
           target: ${{ matrix.target }}
           toolchain: ${{ matrix.toolchain }}
           override: true
+      - name: Cache Rust dependencies
+        uses: actions/cache@v2
+        with:
+          path: |
+            ~/.cargo/registry/index
+            ~/.cargo/registry/cache
+            ~/.cargo/git
+            target
+          key: ${{ runner.os }}-build-${{ hashFiles('**/lockfiles') }}
       - name: Install cross
         run: cargo install cross || true
       - name: Build

From 49789f01d7226c68a718aadf5ebd2684e61c9572 Mon Sep 17 00:00:00 2001
From: Sasha Hilton <sashahilton00@gmail.com>
Date: Sun, 31 Jan 2021 02:02:34 +0000
Subject: [PATCH 15/27] Fix incorrect lockfiles reference

---
 .github/workflows/test.yml | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index c0ccff2c..09281ba3 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -67,7 +67,7 @@ jobs:
             ~/.cargo/registry/cache
             ~/.cargo/git
             target
-          key: ${{ runner.os }}-build-${{ hashFiles('**/lockfiles') }}
+          key: ${{ runner.os }}-build-${{ hashFiles('**/Cargo.lock') }}
       - name: Install developer package dependencies
         run: sudo apt-get update && sudo apt-get install libpulse-dev portaudio19-dev libasound2-dev libsdl2-dev gstreamer1.0-dev libgstreamer-plugins-base1.0-dev
       - run: cargo build --locked --no-default-features
@@ -111,7 +111,7 @@ jobs:
             ~/.cargo/registry/cache
             ~/.cargo/git
             target
-          key: ${{ runner.os }}-build-${{ hashFiles('**/lockfiles') }}
+          key: ${{ runner.os }}-build-${{ hashFiles('**/Cargo.lock') }}
       - name: Install cross
         run: cargo install cross || true
       - name: Build

From cbdb47751a8446dc57fb6cc5adc9df68a717d5bb Mon Sep 17 00:00:00 2001
From: Sasha Hilton <sashahilton00@gmail.com>
Date: Sun, 31 Jan 2021 02:31:35 +0000
Subject: [PATCH 16/27] Add note about cache directory permissions

---
 README.md | 1 +
 1 file changed, 1 insertion(+)

diff --git a/README.md b/README.md
index d49aeda1..1d4e820d 100644
--- a/README.md
+++ b/README.md
@@ -86,6 +86,7 @@ The above command will create a receiver named ```Librespot```, with bitrate set
 
 A full list of runtime options are available [here](https://github.com/librespot-org/librespot/wiki/Options)
 
+_Please Note: When using the cache feature, an authentication blob is stored for your account in the cache directory. For security purposes, we recommend that you set directory permissions on the cache directory to `700`._
 ## Contact
 Come and hang out on gitter if you need help or want to offer some.
 https://gitter.im/librespot-org/spotify-connect-resources

From 5e4e574f78b771e62c43dc46b2486ba554b9424f Mon Sep 17 00:00:00 2001
From: Sasha Hilton <sashahilton00@gmail.com>
Date: Sun, 31 Jan 2021 02:50:20 +0000
Subject: [PATCH 17/27] Bump alsa version in playback crate, remove duplicate
 dependency

---
 Cargo.lock          | 80 ++++++++++++---------------------------------
 playback/Cargo.toml |  2 +-
 2 files changed, 21 insertions(+), 61 deletions(-)

diff --git a/Cargo.lock b/Cargo.lock
index c2e3aa68..2e4286e9 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -66,38 +66,16 @@ dependencies = [
  "stream-cipher",
 ]
 
-[[package]]
-name = "alsa"
-version = "0.2.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b4a0d4ebc8b23041c5de9bc9aee13b4bad844a589479701f31a5934cfe4aeb32"
-dependencies = [
- "alsa-sys 0.1.2",
- "bitflags 0.9.1",
- "libc",
- "nix 0.9.0",
-]
-
 [[package]]
 name = "alsa"
 version = "0.4.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "eb213f6b3e4b1480a60931ca2035794aa67b73103d254715b1db7b70dcb3c934"
 dependencies = [
- "alsa-sys 0.3.0",
- "bitflags 1.2.1",
+ "alsa-sys",
+ "bitflags",
  "libc",
- "nix 0.15.0",
-]
-
-[[package]]
-name = "alsa-sys"
-version = "0.1.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b0edcbbf9ef68f15ae1b620f722180b82a98b6f0628d30baa6b8d2a5abc87d58"
-dependencies = [
- "libc",
- "pkg-config",
+ "nix",
 ]
 
 [[package]]
@@ -196,7 +174,7 @@ version = "0.53.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c72a978d268b1d70b0e963217e60fdabd9523a941457a6c42a7315d15c7e89e5"
 dependencies = [
- "bitflags 1.2.1",
+ "bitflags",
  "cexpr",
  "cfg-if 0.1.10",
  "clang-sys",
@@ -225,12 +203,6 @@ version = "0.6.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5f0dc55f2d8a1a85650ac47858bb001b4c0dd73d79e3c455a842925e68d29cd3"
 
-[[package]]
-name = "bitflags"
-version = "0.9.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4efd02e230a02e18f92fc2735f44597385ed02ad8f831e7c1c1156ee5e1ab3a5"
-
 [[package]]
 name = "bitflags"
 version = "1.2.1"
@@ -378,7 +350,7 @@ version = "0.0.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ddfc5b9aa5d4507acaf872de71051dfd0e309860e88966e1051e462a077aac4f"
 dependencies = [
- "bitflags 1.2.1",
+ "bitflags",
 ]
 
 [[package]]
@@ -387,7 +359,7 @@ version = "0.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4344512281c643ae7638bbabc3af17a11307803ec8f0fcad9fae512a8bf36467"
 dependencies = [
- "bitflags 1.2.1",
+ "bitflags",
 ]
 
 [[package]]
@@ -436,7 +408,7 @@ version = "0.9.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f229761965dad3e9b11081668a6ea00f1def7aa46062321b5ec245b834f6e491"
 dependencies = [
- "bitflags 1.2.1",
+ "bitflags",
  "coreaudio-sys",
 ]
 
@@ -455,7 +427,7 @@ version = "0.13.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "05631e2089dfa5d3b6ea1cfbbfd092e2ee5deeb69698911bc976b28b746d3657"
 dependencies = [
- "alsa 0.4.3",
+ "alsa",
  "core-foundation-sys",
  "coreaudio-rs",
  "jni 0.17.0",
@@ -465,7 +437,7 @@ dependencies = [
  "mach",
  "ndk",
  "ndk-glue",
- "nix 0.15.0",
+ "nix",
  "oboe",
  "parking_lot 0.11.1",
  "stdweb",
@@ -720,7 +692,7 @@ version = "0.3.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "2e9763c69ebaae630ba35f74888db465e49e259ba1bc0eda7d06f4a067615d82"
 dependencies = [
- "bitflags 1.2.1",
+ "bitflags",
  "fuchsia-zircon-sys",
 ]
 
@@ -862,7 +834,7 @@ version = "0.10.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0c685013b7515e668f1b57a165b009d4d28cb139a8a989bbd699c10dad29d0c5"
 dependencies = [
- "bitflags 1.2.1",
+ "bitflags",
  "futures-channel",
  "futures-core",
  "futures-executor",
@@ -924,7 +896,7 @@ version = "0.16.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5d50f822055923f1cbede233aa5dfd4ee957cf328fb3076e330886094e11d6cf"
 dependencies = [
- "bitflags 1.2.1",
+ "bitflags",
  "cfg-if 1.0.0",
  "futures-channel",
  "futures-core",
@@ -948,7 +920,7 @@ version = "0.16.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "cc80888271338c3ede875d8cafc452eb207476ff5539dcbe0018a8f5b827af0e"
 dependencies = [
- "bitflags 1.2.1",
+ "bitflags",
  "futures-core",
  "futures-sink",
  "glib",
@@ -981,7 +953,7 @@ version = "0.16.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "bafd01c56f59cb10f4b5a10f97bb4bdf8c2b2784ae5b04da7e2d400cf6e6afcf"
 dependencies = [
- "bitflags 1.2.1",
+ "bitflags",
  "glib",
  "glib-sys",
  "gobject-sys",
@@ -1201,7 +1173,7 @@ version = "0.6.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7c1871c91fa65aa328f3bedbaa54a6e5d1de009264684c153eb708ba933aa6f5"
 dependencies = [
- "bitflags 1.2.1",
+ "bitflags",
  "jack-sys",
  "lazy_static",
  "libc",
@@ -1532,7 +1504,7 @@ dependencies = [
 name = "librespot-playback"
 version = "0.1.3"
 dependencies = [
- "alsa 0.2.2",
+ "alsa",
  "byteorder",
  "cpal",
  "futures",
@@ -1811,25 +1783,13 @@ dependencies = [
  "winapi 0.3.9",
 ]
 
-[[package]]
-name = "nix"
-version = "0.9.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a2c5afeb0198ec7be8569d666644b574345aad2e95a53baf3a532da3e0f3fb32"
-dependencies = [
- "bitflags 0.9.1",
- "cfg-if 0.1.10",
- "libc",
- "void",
-]
-
 [[package]]
 name = "nix"
 version = "0.15.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3b2e0b4f3320ed72aaedb9a5ac838690a8047c7b275da22711fddff4f8a14229"
 dependencies = [
- "bitflags 1.2.1",
+ "bitflags",
  "cc",
  "cfg-if 0.1.10",
  "libc",
@@ -2126,7 +2086,7 @@ version = "0.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "cdb6b5eff96ccc9bf44d34c379ab03ae944426d83d1694345bdf8159d561d562"
 dependencies = [
- "bitflags 1.2.1",
+ "bitflags",
  "libc",
  "portaudio-sys",
 ]
@@ -2519,7 +2479,7 @@ version = "0.34.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "fcbb85f4211627a7291c83434d6bbfa723e28dcaa53c7606087e3c61929e4b9c"
 dependencies = [
- "bitflags 1.2.1",
+ "bitflags",
  "lazy_static",
  "libc",
  "sdl2-sys",
@@ -3266,7 +3226,7 @@ version = "3.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4ce50d8996df1f85af15f2cd8d33daae6e479575123ef4314a51a70a230739cb"
 dependencies = [
- "bitflags 1.2.1",
+ "bitflags",
  "chrono",
 ]
 
diff --git a/playback/Cargo.toml b/playback/Cargo.toml
index edd0951f..115785d2 100644
--- a/playback/Cargo.toml
+++ b/playback/Cargo.toml
@@ -23,7 +23,7 @@ log = "0.4"
 byteorder = "1.3"
 shell-words = "1.0.0"
 
-alsa            = { version = "0.2", optional = true }
+alsa            = { version = "0.4", optional = true }
 portaudio-rs    = { version = "0.3", optional = true }
 libpulse-binding        = { version = "2.13", optional = true, default-features = false }
 libpulse-simple-binding = { version = "2.13", optional = true, default-features = false }

From efedc678d09e18e48f50e48f4f36070668a9fadc Mon Sep 17 00:00:00 2001
From: johannesd3 <johannesd@outlook.com>
Date: Sun, 31 Jan 2021 10:00:02 +0100
Subject: [PATCH 18/27] Handle cache full situation

---
 core/src/cache.rs | 34 +++++++++++++++++++++++++++-------
 1 file changed, 27 insertions(+), 7 deletions(-)

diff --git a/core/src/cache.rs b/core/src/cache.rs
index 018c4c25..00f0f407 100644
--- a/core/src/cache.rs
+++ b/core/src/cache.rs
@@ -131,15 +131,35 @@ impl Cache {
     }
 
     pub fn save_file<F: Read>(&self, file: FileId, contents: &mut F) {
-        if let Some(path) = self.file_path(file) {
-            let parent = path.parent().unwrap();
-            let result = fs::create_dir_all(parent)
-                .and_then(|_| File::create(path))
-                .and_then(|mut file| io::copy(contents, &mut file));
+        let path = if let Some(path) = self.file_path(file) {
+            path
+        } else {
+            return;
+        };
+        let parent = path.parent().unwrap();
 
-            if let Err(e) = result {
-                warn!("Cannot save file to cache: {}", e)
+        let result = fs::create_dir_all(parent)
+            .and_then(|_| File::create(&path))
+            .and_then(|mut file| io::copy(contents, &mut file));
+
+        if let Err(e) = result {
+            if e.kind() == ErrorKind::Other {
+                // Perhaps there's no space left in the cache
+                // TODO: try to narrow down the error (platform-dependently)
+                info!("An error occured while writing to cache, trying to flush the cache");
+
+                if fs::remove_dir_all(self.audio_location.as_ref().unwrap())
+                    .and_then(|_| fs::create_dir_all(parent))
+                    .and_then(|_| File::create(&path))
+                    .and_then(|mut file| io::copy(contents, &mut file))
+                    .is_ok()
+                {
+                    // It worked, there's no need to print a warning
+                    return;
+                }
             }
+
+            warn!("Cannot save file to cache: {}", e)
         }
     }
 }

From 34468648381fefacafb3ae47640c9b70b5a59437 Mon Sep 17 00:00:00 2001
From: johannesd3 <johannesd@outlook.com>
Date: Tue, 2 Feb 2021 02:18:58 +0100
Subject: [PATCH 19/27] Handle corrupt cache files (#591)

---
 audio/src/fetch.rs     |  4 ++++
 core/src/cache.rs      | 13 +++++++++++++
 playback/src/player.rs | 23 ++++++++++++++++++++++-
 3 files changed, 39 insertions(+), 1 deletion(-)

diff --git a/audio/src/fetch.rs b/audio/src/fetch.rs
index bae69419..9f96adbd 100644
--- a/audio/src/fetch.rs
+++ b/audio/src/fetch.rs
@@ -459,6 +459,10 @@ impl AudioFile {
             }
         }
     }
+
+    pub fn is_cached(&self) -> bool {
+        matches!(self, AudioFile::Cached { .. })
+    }
 }
 
 fn request_range(session: &Session, file: FileId, offset: usize, length: usize) -> Channel {
diff --git a/core/src/cache.rs b/core/src/cache.rs
index 00f0f407..55c9ab01 100644
--- a/core/src/cache.rs
+++ b/core/src/cache.rs
@@ -162,4 +162,17 @@ impl Cache {
             warn!("Cannot save file to cache: {}", e)
         }
     }
+
+    pub fn remove_file(&self, file: FileId) -> bool {
+        if let Some(path) = self.file_path(file) {
+            if let Err(err) = fs::remove_file(path) {
+                warn!("Unable to remove file from cache: {}", err);
+                false
+            } else {
+                true
+            }
+        } else {
+            false
+        }
+    }
 }
diff --git a/playback/src/player.rs b/playback/src/player.rs
index 125184a0..314311f6 100644
--- a/playback/src/player.rs
+++ b/playback/src/player.rs
@@ -682,6 +682,7 @@ impl PlayerTrackLoader {
                 return None;
             }
         };
+        let is_cached = encrypted_file.is_cached();
 
         let mut stream_loader_controller = encrypted_file.get_stream_loader_controller();
 
@@ -715,7 +716,27 @@ impl PlayerTrackLoader {
 
         let audio_file = Subfile::new(decrypted_file, 0xa7);
 
-        let mut decoder = VorbisDecoder::new(audio_file).unwrap();
+        let mut decoder = match VorbisDecoder::new(audio_file) {
+            Ok(decoder) => decoder,
+            Err(e) if is_cached => {
+                warn!(
+                    "Unable to read cached audio file: {}. Trying to download it.",
+                    e
+                );
+
+                // unwrap safety: The file is cached, so session must have a cache
+                if !self.session.cache().unwrap().remove_file(file_id) {
+                    return None;
+                }
+
+                // Just try it again
+                return self.load_track(spotify_id, position_ms);
+            }
+            Err(e) => {
+                error!("Unable to read audio file: {}", e);
+                return None;
+            }
+        };
 
         if position_ms != 0 {
             match decoder.seek(position_ms as i64) {

From f67ceb5f6d955c800564a98f8a4098c7702e8083 Mon Sep 17 00:00:00 2001
From: johannesd3 <johannesd@outlook.com>
Date: Tue, 2 Feb 2021 02:19:15 +0100
Subject: [PATCH 20/27] Small refactoring

---
 playback/src/player.rs | 23 +++++++++--------------
 1 file changed, 9 insertions(+), 14 deletions(-)

diff --git a/playback/src/player.rs b/playback/src/player.rs
index 314311f6..e3fb037e 100644
--- a/playback/src/player.rs
+++ b/playback/src/player.rs
@@ -651,18 +651,14 @@ impl PlayerTrackLoader {
                 FileFormat::OGG_VORBIS_96,
             ],
         };
-        let format = formats
-            .iter()
-            .find(|format| audio.files.contains_key(format))
-            .unwrap();
 
-        let file_id = match audio.files.get(&format) {
-            Some(&file_id) => file_id,
-            None => {
-                warn!("<{}> in not available in format {:?}", audio.name, format);
-                return None;
-            }
-        };
+        let (format, file_id) = formats
+            .iter()
+            .find_map(|format| Some((format, *audio.files.get(&format)?)))
+            .or_else(|| {
+                warn!("<{}> is not available in any supported format", audio.name);
+                None
+            })?;
 
         let bytes_per_second = self.stream_data_rate(*format);
         let play_from_beginning = position_ms == 0;
@@ -739,9 +735,8 @@ impl PlayerTrackLoader {
         };
 
         if position_ms != 0 {
-            match decoder.seek(position_ms as i64) {
-                Ok(_) => (),
-                Err(err) => error!("Vorbis error: {:?}", err),
+            if let Err(err) = decoder.seek(position_ms as i64) {
+                error!("Vorbis error: {}", err);
             }
             stream_loader_controller.set_stream_mode();
         }

From 71e9295ee8cc9c9acd8345fc5d0ffe192c55fdff Mon Sep 17 00:00:00 2001
From: Alexandre Trendel <trendel.alexandre@gmail.com>
Date: Mon, 18 Jan 2021 14:30:24 +0100
Subject: [PATCH 21/27] fix: map authentication errors to a custom error type

---
 core/src/authentication.rs | 35 +++++++++++++++++++++++++++++++++++
 core/src/connection/mod.rs | 10 ++++------
 core/src/session.rs        | 14 +++++++++-----
 src/main.rs                |  6 +++---
 4 files changed, 51 insertions(+), 14 deletions(-)

diff --git a/core/src/authentication.rs b/core/src/authentication.rs
index 36cbd439..5e5c82ac 100644
--- a/core/src/authentication.rs
+++ b/core/src/authentication.rs
@@ -13,6 +13,7 @@ use std::ops::FnOnce;
 use std::path::Path;
 
 use crate::protocol::authentication::AuthenticationType;
+use crate::protocol::keyexchange::{APLoginFailed, ErrorCode};
 
 #[derive(Debug, Clone, Serialize, Deserialize)]
 pub struct Credentials {
@@ -191,3 +192,37 @@ pub fn get_credentials<F: FnOnce(&String) -> String>(
         (None, _, None) => None,
     }
 }
+
+error_chain! {
+    types {
+        AuthenticationError, AuthenticationErrorKind, AuthenticationResultExt, AuthenticationResult;
+    }
+
+    foreign_links {
+        Io(::std::io::Error);
+    }
+
+    errors {
+        BadCredentials {
+            description("Bad credentials")
+            display("Authentication failed with error: Bad credentials")
+        }
+        PremiumAccountRequired {
+            description("Premium account required")
+            display("Authentication failed with error: Premium account required")
+        }
+    }
+}
+
+impl From<APLoginFailed> for AuthenticationError {
+    fn from(login_failure: APLoginFailed) -> Self {
+        let error_code = login_failure.get_error_code();
+        match error_code {
+            ErrorCode::BadCredentials => Self::from_kind(AuthenticationErrorKind::BadCredentials),
+            ErrorCode::PremiumAccountRequired => {
+                Self::from_kind(AuthenticationErrorKind::PremiumAccountRequired)
+            }
+            _ => format!("Authentication failed with error: {:?}", error_code).into(),
+        }
+    }
+}
diff --git a/core/src/connection/mod.rs b/core/src/connection/mod.rs
index 72497795..ffc6d0f4 100644
--- a/core/src/connection/mod.rs
+++ b/core/src/connection/mod.rs
@@ -13,7 +13,7 @@ use tokio_core::net::TcpStream;
 use tokio_core::reactor::Handle;
 use url::Url;
 
-use crate::authentication::Credentials;
+use crate::authentication::{AuthenticationError, Credentials};
 use crate::version;
 
 use crate::proxytunnel;
@@ -66,7 +66,7 @@ pub fn authenticate(
     transport: Transport,
     credentials: Credentials,
     device_id: String,
-) -> Box<dyn Future<Item = (Transport, Credentials), Error = io::Error>> {
+) -> Box<dyn Future<Item = (Transport, Credentials), Error = AuthenticationError>> {
     use crate::protocol::authentication::{APWelcome, ClientResponseEncrypted, CpuFamily, Os};
     use crate::protocol::keyexchange::APLoginFailed;
 
@@ -101,6 +101,7 @@ pub fn authenticate(
         transport
             .send((cmd, data))
             .and_then(|transport| transport.into_future().map_err(|(err, _stream)| err))
+            .map_err(|io_err| io_err.into())
             .and_then(|(packet, transport)| match packet {
                 Some((0xac, data)) => {
                     let welcome_data: APWelcome =
@@ -118,10 +119,7 @@ pub fn authenticate(
                 Some((0xad, data)) => {
                     let error_data: APLoginFailed =
                         protobuf::parse_from_bytes(data.as_ref()).unwrap();
-                    panic!(
-                        "Authentication failed with reason: {:?}",
-                        error_data.get_error_code()
-                    )
+                    Err(error_data.into())
                 }
 
                 Some((cmd, _)) => panic!("Unexpected packet {:?}", cmd),
diff --git a/core/src/session.rs b/core/src/session.rs
index 4d86a02b..3754a000 100644
--- a/core/src/session.rs
+++ b/core/src/session.rs
@@ -19,6 +19,8 @@ use crate::config::SessionConfig;
 use crate::connection;
 use crate::mercury::MercuryManager;
 
+pub use crate::authentication::{AuthenticationError, AuthenticationErrorKind};
+
 struct SessionData {
     country: String,
     time_delta: i64,
@@ -53,16 +55,18 @@ impl Session {
         credentials: Credentials,
         cache: Option<Cache>,
         handle: Handle,
-    ) -> Box<dyn Future<Item = Session, Error = io::Error>> {
+    ) -> Box<dyn Future<Item = Session, Error = AuthenticationError>> {
         let access_point =
             apresolve_or_fallback::<io::Error>(&handle, &config.proxy, &config.ap_port);
 
         let handle_ = handle.clone();
         let proxy = config.proxy.clone();
-        let connection = access_point.and_then(move |addr| {
-            info!("Connecting to AP \"{}\"", addr);
-            connection::connect(addr, &handle_, &proxy)
-        });
+        let connection = access_point
+            .and_then(move |addr| {
+                info!("Connecting to AP \"{}\"", addr);
+                connection::connect(addr, &handle_, &proxy)
+            })
+            .map_err(|io_err| io_err.into());
 
         let device_id = config.device_id.clone();
         let authentication = connection.and_then(move |connection| {
diff --git a/src/main.rs b/src/main.rs
index 4d3c4f40..051b19b2 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -3,7 +3,7 @@ use futures::{Async, Future, Poll, Stream};
 use log::{error, info, trace, warn};
 use sha1::{Digest, Sha1};
 use std::env;
-use std::io::{self, stderr, Write};
+use std::io::{stderr, Write};
 use std::mem;
 use std::path::PathBuf;
 use std::process::exit;
@@ -16,7 +16,7 @@ use url::Url;
 use librespot::core::authentication::{get_credentials, Credentials};
 use librespot::core::cache::Cache;
 use librespot::core::config::{ConnectConfig, DeviceType, SessionConfig, VolumeCtrl};
-use librespot::core::session::Session;
+use librespot::core::session::{AuthenticationError, Session};
 use librespot::core::version;
 
 use librespot::connect::discovery::{discovery, DiscoveryStream};
@@ -406,7 +406,7 @@ struct Main {
 
     spirc: Option<Spirc>,
     spirc_task: Option<SpircTask>,
-    connect: Box<dyn Future<Item = Session, Error = io::Error>>,
+    connect: Box<dyn Future<Item = Session, Error = AuthenticationError>>,
 
     shutdown: bool,
     last_credentials: Option<Credentials>,

From a3ad8eb962effb5e4ad2657787cf44caf996cb57 Mon Sep 17 00:00:00 2001
From: Sasha Hilton <sashahilton00@gmail.com>
Date: Tue, 9 Feb 2021 03:11:38 +0000
Subject: [PATCH 22/27] Remove Travis as CI test

---
 .travis.yml | 73 -----------------------------------------------------
 1 file changed, 73 deletions(-)
 delete mode 100644 .travis.yml

diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index 6887d9f8..00000000
--- a/.travis.yml
+++ /dev/null
@@ -1,73 +0,0 @@
-language: rust
-rust:
-  - 1.40.0
-  - stable
-  - beta
-  - nightly
-
-# Need to cache the whole `.cargo` directory to keep .crates.toml for
-# cargo-update to work
-cache:
-  directories:
-    - /home/travis/.cargo
-
-# But don't cache the cargo registry
-before_cache:
-  - rm -rf /home/travis/.cargo/registry
-
-matrix:
-  # Performance tweak
-  fast_finish: true
-  # Ignore failures in nightly, not ideal, but necessary
-  allow_failures:
-  - rust: nightly
-
-  # Only run the formatting check for stable
-  include:
-  - name: 'Rust: format check'
-    rust: stable
-    install:
-    - rustup component add rustfmt
-    script:
-    - cargo fmt --verbose --all -- --check
-
-addons:
-  apt:
-    packages:
-      - gcc-arm-linux-gnueabihf
-      - libc6-dev-armhf-cross
-      - libpulse-dev
-      - portaudio19-dev
-      - libasound2-dev
-      - libsdl2-dev
-      - gstreamer1.0-dev
-      - libgstreamer-plugins-base1.0-dev
-
-before_script:
-    - mkdir -p ~/.cargo
-    - echo '[target.armv7-unknown-linux-gnueabihf]' > ~/.cargo/config
-    - echo 'linker = "arm-linux-gnueabihf-gcc"' >> ~/.cargo/config
-    - rustup target add armv7-unknown-linux-gnueabihf
-
-script:
-    - cargo build --locked --no-default-features
-    - cargo build --locked --examples
-    - cargo build --locked --no-default-features --features "with-tremor"
-    - cargo build --locked --no-default-features --features "with-vorbis"
-    - cargo build --locked --no-default-features --features "alsa-backend"
-    - cargo build --locked --no-default-features --features "portaudio-backend"
-    - cargo build --locked --no-default-features --features "pulseaudio-backend"
-    - cargo build --locked --no-default-features --features "jackaudio-backend"
-    - cargo build --locked --no-default-features --features "rodio-backend"
-    - cargo build --locked --no-default-features --features "sdl-backend"
-    - cargo build --locked --no-default-features --features "gstreamer-backend"
-    - cargo build --locked --no-default-features --target armv7-unknown-linux-gnueabihf
-
-notifications:
-  email: false
-  webhooks:
-    urls:
-      - https://webhooks.gitter.im/e/780b178b15811059752e
-    on_success: change  # options: [always|never|change] default: always
-    on_failure: always  # options: [always|never|change] default: always
-    on_start: never     # options: [always|never|change] default: always

From deabf1f9157559c0e01416b21f0c35a8d729f7f9 Mon Sep 17 00:00:00 2001
From: Sasha Hilton <sashahilton00@gmail.com>
Date: Tue, 9 Feb 2021 03:16:40 +0000
Subject: [PATCH 23/27] Minor updates to discovery and device types

---
 connect/src/discovery.rs |  5 ++++-
 core/src/config.rs       | 28 ++++++++++++++++++++++++++++
 2 files changed, 32 insertions(+), 1 deletion(-)

diff --git a/connect/src/discovery.rs b/connect/src/discovery.rs
index 9779e6f8..b53070d7 100644
--- a/connect/src/discovery.rs
+++ b/connect/src/discovery.rs
@@ -75,7 +75,7 @@ impl Discovery {
             "status": 101,
             "statusString": "ERROR-OK",
             "spotifyError": 0,
-            "version": "2.1.0",
+            "version": "2.7.1",
             "deviceID": (self.0.device_id),
             "remoteName": (self.0.config.name),
             "activeUser": "",
@@ -85,6 +85,9 @@ impl Discovery {
             "accountReq": "PREMIUM",
             "brandDisplayName": "librespot",
             "modelDisplayName": "librespot",
+            "resolverVersion": "0",
+            "groupStatus": "NONE",
+            "voiceSupport": "NO",
         });
 
         let body = result.to_string();
diff --git a/core/src/config.rs b/core/src/config.rs
index 12c1b2ed..60cb66e0 100644
--- a/core/src/config.rs
+++ b/core/src/config.rs
@@ -36,6 +36,16 @@ pub enum DeviceType {
     AVR = 6,
     STB = 7,
     AudioDongle = 8,
+    GameConsole = 9,
+    CastAudio = 10,
+    CastVideo = 11,
+    Automobile = 12,
+    Smartwatch = 13,
+    Chromebook = 14,
+    UnknownSpotify = 100,
+    CarThing = 101,
+    Observer = 102,
+    HomeThing = 103,
 }
 
 impl FromStr for DeviceType {
@@ -51,6 +61,14 @@ impl FromStr for DeviceType {
             "avr" => Ok(AVR),
             "stb" => Ok(STB),
             "audiodongle" => Ok(AudioDongle),
+            "gameconsole" => Ok(GameConsole),
+            "castaudio" => Ok(CastAudio),
+            "castvideo" => Ok(CastVideo),
+            "automobile" => Ok(Automobile),
+            "smartwatch" => Ok(Smartwatch),
+            "chromebook" => Ok(Chromebook),
+            "carthing" => Ok(CarThing),
+            "homething" => Ok(HomeThing),
             _ => Err(()),
         }
     }
@@ -69,6 +87,16 @@ impl fmt::Display for DeviceType {
             AVR => f.write_str("AVR"),
             STB => f.write_str("STB"),
             AudioDongle => f.write_str("AudioDongle"),
+            GameConsole => f.write_str("GameConsole"),
+            CastAudio => f.write_str("CastAudio"),
+            CastVideo => f.write_str("CastVideo"),
+            Automobile => f.write_str("Automobile"),
+            Smartwatch => f.write_str("Smartwatch"),
+            Chromebook => f.write_str("Chromebook"),
+            UnknownSpotify => f.write_str("UnknownSpotify"),
+            CarThing => f.write_str("CarThing"),
+            Observer => f.write_str("Observer"),
+            HomeThing => f.write_str("HomeThing"),
         }
     }
 }

From d3495cfed4150a021b53b84f8c3ddeb17315dfd5 Mon Sep 17 00:00:00 2001
From: johannesd3 <johannesd@outlook.com>
Date: Tue, 9 Feb 2021 09:14:32 +0100
Subject: [PATCH 24/27] Re-add support for Rust 1.40

---
 audio/src/fetch.rs | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/audio/src/fetch.rs b/audio/src/fetch.rs
index 9f96adbd..11745a25 100644
--- a/audio/src/fetch.rs
+++ b/audio/src/fetch.rs
@@ -461,7 +461,10 @@ impl AudioFile {
     }
 
     pub fn is_cached(&self) -> bool {
-        matches!(self, AudioFile::Cached { .. })
+        match self {
+            AudioFile::Cached { .. } => true,
+            _ => false,
+        }
     }
 }
 

From 2f660f74ecf66bc15cf18ea7bf317ed3a942eb8d Mon Sep 17 00:00:00 2001
From: johannesd3 <johannesd@outlook.com>
Date: Tue, 9 Feb 2021 09:15:55 +0100
Subject: [PATCH 25/27] Small refactor

---
 playback/src/player.rs | 22 +++++++++++++++-------
 1 file changed, 15 insertions(+), 7 deletions(-)

diff --git a/playback/src/player.rs b/playback/src/player.rs
index e3fb037e..8585a957 100644
--- a/playback/src/player.rs
+++ b/playback/src/player.rs
@@ -652,15 +652,23 @@ impl PlayerTrackLoader {
             ],
         };
 
-        let (format, file_id) = formats
-            .iter()
-            .find_map(|format| Some((format, *audio.files.get(&format)?)))
-            .or_else(|| {
-                warn!("<{}> is not available in any supported format", audio.name);
+        let entry = formats.iter().find_map(|format| {
+            if let Some(&file_id) = audio.files.get(format) {
+                Some((*format, file_id))
+            } else {
                 None
-            })?;
+            }
+        });
 
-        let bytes_per_second = self.stream_data_rate(*format);
+        let (format, file_id) = match entry {
+            Some(t) => t,
+            None => {
+                warn!("<{}> is not available in any supported format", audio.name);
+                return None;
+            }
+        };
+
+        let bytes_per_second = self.stream_data_rate(format);
         let play_from_beginning = position_ms == 0;
 
         let key = self.session.audio_key().request(spotify_id, file_id);

From 6d15a17df8c49ec8a9ccdc8036523fbdcaa07342 Mon Sep 17 00:00:00 2001
From: Sasha Hilton <sashahilton00@gmail.com>
Date: Wed, 10 Feb 2021 00:25:19 +0000
Subject: [PATCH 26/27] Bump MSRV to 1.42.0

---
 .github/workflows/test.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 09281ba3..4ad4b406 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -41,7 +41,7 @@ jobs:
       matrix:
         os: [ubuntu-latest]
         toolchain:
-          - 1.40.0 # MSRV (Minimum supported rust version)
+          - 1.42.0 # MSRV (Minimum supported rust version)
           - stable
           - beta
         experimental: [false]

From 0246c049879ad501390824314082576011917c6e Mon Sep 17 00:00:00 2001
From: Sasha Hilton <sashahilton00@gmail.com>
Date: Wed, 10 Feb 2021 00:28:45 +0000
Subject: [PATCH 27/27] Remove Travis CI badge, add Github workflows badge.

---
 README.md | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/README.md b/README.md
index 1d4e820d..e772c510 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,4 @@
-[![Build Status](https://img.shields.io/github/workflow/status/librespot-org/librespot/test/dev)](https://github.com/librespot-org/librespot/actions)
-[![Build Status](https://travis-ci.org/librespot-org/librespot.svg?branch=dev)](https://travis-ci.org/librespot-org/librespot)
+[![Build Status](https://github.com/librespot-org/librespot/workflows/test/badge.svg)](https://github.com/librespot-org/librespot/actions)
 [![Gitter chat](https://badges.gitter.im/librespot-org/librespot.png)](https://gitter.im/librespot-org/spotify-connect-resources)
 [![Crates.io](https://img.shields.io/crates/v/librespot.svg)](https://crates.io/crates/librespot)
 
@@ -21,7 +20,7 @@ As the origin by [plietar](https://github.com/plietar/) is no longer actively ma
 # Documentation
 Documentation is currently a work in progress, contributions are welcome!
 
-There is some brief documentation on how the protocol works in the [docs](https://github.com/librespot-org/librespot/tree/master/docs) folder, 
+There is some brief documentation on how the protocol works in the [docs](https://github.com/librespot-org/librespot/tree/master/docs) folder,
 
 [COMPILING.md](https://github.com/librespot-org/librespot/blob/master/COMPILING.md) contains detailed instructions on setting up a development environment, and compiling librespot. More general usage and compilation information is available on the [wiki](https://github.com/librespot-org/librespot/wiki).
 [CONTRIBUTING.md](https://github.com/librespot-org/librespot/blob/master/CONTRIBUTING.md) also contains our contributing guidelines.
@@ -32,7 +31,7 @@ If you wish to learn more about how librespot works overall, the best way is to
 If you run into a bug when using librespot, please search the existing issues before opening a new one. Chances are, we've encountered it before, and have provided a resolution. If not, please open a new one, and where possible, include the backtrace librespot generates on crashing, along with anything we can use to reproduce the issue, eg. the Spotify URI of the song that caused the crash.
 
 # Building
-A quick walk through of the build process is outlined here, while a detailed compilation guide can be found [here](https://github.com/librespot-org/librespot/blob/master/COMPILING.md). 
+A quick walk through of the build process is outlined here, while a detailed compilation guide can be found [here](https://github.com/librespot-org/librespot/blob/master/COMPILING.md).
 
 ## Additional Dependencies
 We recently switched to using [Rodio](https://github.com/tomaka/rodio) for audio playback by default, hence for macOS and Windows, you should just be able to clone and build librespot (with the command below).
@@ -111,4 +110,3 @@ functionality.
 - [librespot-java](https://github.com/devgianlu/librespot-java) - A Java port of librespot.
 - [ncspot](https://github.com/hrkfdn/ncspot) - Cross-platform ncurses Spotify client.
 - [ansible-role-librespot](https://github.com/xMordax/ansible-role-librespot/tree/master) - Ansible role that will build, install and configure Librespot.
-