Add radio sorter with improved music analysis and misc cleanup

Cargo.lock

@@ -382,12 +382,6 @@ dependencies = [
  "os_str_bytes",
 ]
 
-[[package]]
-name = "claxon"
-version = "0.4.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4bfbf56724aa9eca8afa4fcfadeb479e722935bb2a0900c2d37e0cc477af0688"
-
 [[package]]
 name = "combine"
 version = "4.6.6"
@@ -772,15 +766,6 @@ dependencies = [
  "miniz_oxide",
 ]
 
-[[package]]
-name = "fluent-uri"
-version = "0.1.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "80caca0b85a39e8e4139c36441543e698b204279ae8065b3af413c9bf8b33146"
-dependencies = [
- "bitflags",
-]
-
 [[package]]
 name = "fs_extra"
 version = "1.2.0"
@@ -885,12 +870,6 @@ dependencies = [
  "libc",
 ]
 
-[[package]]
-name = "hound"
-version = "3.5.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4d13cdbd5dbb29f9c88095bbdc2590c9cba0d0a1269b983fef6b2cdd7e9f4db1"
-
 [[package]]
 name = "humantime"
 version = "2.1.0"
@@ -1006,17 +985,6 @@ version = "1.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "830d08ce1d1d941e6b30645f1a0eb5643013d835ce3779a5fc208261dbe10f55"
 
-[[package]]
-name = "lewton"
-version = "0.10.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "777b48df9aaab155475a83a7df3070395ea1ac6902f5cd062b8f2b028075c030"
-dependencies = [
- "byteorder",
- "ogg",
- "tinyvec",
-]
-
 [[package]]
 name = "libc"
 version = "0.2.137"
@@ -1145,26 +1113,6 @@ version = "0.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "68354c5c6bd36d73ff3feceb05efa59b6acb7626617f4962be322a825e61f79a"
 
-[[package]]
-name = "minimp3"
-version = "0.5.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "985438f75febf74c392071a975a29641b420dd84431135a6e6db721de4b74372"
-dependencies = [
- "minimp3-sys",
- "slice-deque",
- "thiserror",
-]
-
-[[package]]
-name = "minimp3-sys"
-version = "0.3.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e21c73734c69dc95696c9ed8926a2b393171d98b3f5f5935686a26a487ab9b90"
-dependencies = [
- "cc",
-]
-
 [[package]]
 name = "miniz_oxide"
 version = "0.5.4"
@@ -1235,7 +1183,6 @@ dependencies = [
 name = "muss-player"
 version = "0.9.0"
 dependencies = [
- "fluent-uri",
  "m3u8-rs",
  "mpd",
  "mpris-player",
@@ -1524,15 +1471,6 @@ dependencies = [
  "cc",
 ]
 
-[[package]]
-name = "ogg"
-version = "0.8.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6951b4e8bf21c8193da321bcce9c9dd2e13c858fe078bf9054a288b419ae5d6e"
-dependencies = [
- "byteorder",
-]
-
 [[package]]
 name = "once_cell"
 version = "1.16.0"
@@ -1993,11 +1931,7 @@ version = "0.16.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "eb10b653d5ec0e9411a2e7d46e2c7f4046fd87d35b9955bd73ba4108d69072b5"
 dependencies = [
- "claxon",
  "cpal",
- "hound",
- "lewton",
- "minimp3",
  "symphonia",
 ]
 
@@ -2206,17 +2140,6 @@ version = "1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "43b2853a4d09f215c24cc5489c992ce46052d359b5109343cbafbf26bc62f8a3"
 
-[[package]]
-name = "slice-deque"
-version = "0.3.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "31ef6ee280cdefba6d2d0b4b78a84a1c1a3f3a4cec98c2d4231c8bc225de0f25"
-dependencies = [
- "libc",
- "mach",
- "winapi 0.3.9",
-]
-
 [[package]]
 name = "smallvec"
 version = "1.10.0"
@@ -2604,21 +2527,6 @@ dependencies = [
  "serde_json",
 ]
 
-[[package]]
-name = "tinyvec"
-version = "1.6.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "87cc5ceb3875bb20c2890005a4e226a4651264a5c75edb2421b52861a0a0cb50"
-dependencies = [
- "tinyvec_macros",
-]
-
-[[package]]
-name = "tinyvec_macros"
-version = "0.1.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cda74da7e1a664f795bb1f8a87ec406fb89a02522cf6e50620d016add6dbbf5c"
-
 [[package]]
 name = "toml"
 version = "0.5.9"

bliss-rs

@@ -1 +1 @@
-Subproject commit 4db79db51f6b931066b0185180d5884f6cdfe935
+Subproject commit 2dcdd5643bc0cd055887128637abbb9bed041f77

interpreter/src/interpretor.rs

@@ -19,7 +19,8 @@ pub(crate) fn standard_vocab(vocabulary: &mut LanguageDictionary) {
         .add(crate::lang::vocabulary::sorters::shuffle_sort()) // accepts ~(shuffle)
         .add(crate::lang::vocabulary::sorters::bliss_sort())
         .add(crate::lang::vocabulary::sorters::bliss_next_sort())
-        .add(crate::lang::vocabulary::sorters::field_sort()) // accepts any ~(something)
+        .add(crate::lang::vocabulary::sorters::radio_sort())
+        .add(crate::lang::vocabulary::sorters::field_sort()) // accepts any ~(name)
         // iter blocks
         .add(
             crate::lang::ItemBlockFactory::new()

interpreter/src/lang/operation.rs

@@ -9,6 +9,9 @@ use crate::tokens::Token;
 use crate::Context;
 use crate::Item;
 
+// TODO change API to allow for accumulating modifiers
+// e.g. build_op(&self, Option<Box<dyn Op>>, tokens) -> ...
+
 pub trait SimpleOpFactory<T: Op + 'static> {
     fn is_op_simple(&self, tokens: &VecDeque<Token>) -> bool;
 

interpreter/src/lang/vocabulary/sorters/bliss_next_sorter.rs

@@ -2,7 +2,7 @@ use std::collections::VecDeque;
 #[cfg(feature = "advanced")]
 use std::fmt::{Debug, Display, Error, Formatter};
 
-use crate::lang::utility::{assert_name, check_name};
+use crate::lang::utility::{assert_name, check_name, assert_token_raw};
 use crate::lang::SyntaxError;
 #[cfg(feature = "advanced")]
 use crate::lang::{IteratorItem, Op, RuntimeMsg, Sorter};
@@ -142,7 +142,9 @@ pub struct BlissNextSorterFactory;
 
 impl SorterFactory<BlissNextSorter> for BlissNextSorterFactory {
     fn is_sorter(&self, tokens: &VecDeque<&Token>) -> bool {
-        tokens.len() > 1 && check_name("advanced", tokens[0]) && check_name("bliss_next", tokens[1])
+        tokens.len() > 1
+            && (tokens[0].is_tilde() || check_name("advanced", tokens[0]))
+            && check_name("bliss_next", tokens[1])
     }
 
     fn build_sorter(
@@ -150,7 +152,11 @@ impl SorterFactory<BlissNextSorter> for BlissNextSorterFactory {
         tokens: &mut VecDeque<Token>,
         _dict: &LanguageDictionary,
     ) -> Result<BlissNextSorter, SyntaxError> {
-        assert_name("advanced", tokens)?;
+        if tokens[0].is_tilde() {
+            assert_token_raw(Token::Tilde, tokens)?;
+        } else {
+            assert_name("advanced", tokens)?;
+        }
         assert_name("bliss_next", tokens)?;
         Ok(BlissNextSorter::default())
     }

interpreter/src/lang/vocabulary/sorters/bliss_sorter.rs

@@ -5,7 +5,7 @@ use std::fmt::{Debug, Display, Error, Formatter};
 #[cfg(feature = "advanced")]
 use std::collections::HashMap;
 
-use crate::lang::utility::{assert_name, check_name};
+use crate::lang::utility::{assert_name, check_name, assert_token_raw};
 use crate::lang::SyntaxError;
 #[cfg(feature = "advanced")]
 use crate::lang::{IteratorItem, Op, RuntimeMsg, Sorter};
@@ -134,7 +134,7 @@ pub struct BlissSorterFactory;
 impl SorterFactory<BlissSorter> for BlissSorterFactory {
     fn is_sorter(&self, tokens: &VecDeque<&Token>) -> bool {
         tokens.len() > 1
-            && check_name("advanced", tokens[0])
+            && (tokens[0].is_tilde() || check_name("advanced", tokens[0]))
             && check_name("bliss_first", tokens[1])
     }
 
@@ -143,7 +143,11 @@ impl SorterFactory<BlissSorter> for BlissSorterFactory {
         tokens: &mut VecDeque<Token>,
         _dict: &LanguageDictionary,
     ) -> Result<BlissSorter, SyntaxError> {
-        assert_name("advanced", tokens)?;
+        if tokens[0].is_tilde() {
+            assert_token_raw(Token::Tilde, tokens)?;
+        } else {
+            assert_name("advanced", tokens)?;
+        }
         assert_name("bliss_first", tokens)?;
         Ok(BlissSorter::default())
     }

interpreter/src/lang/vocabulary/sorters/mod.rs

@@ -2,6 +2,7 @@ mod bliss_next_sorter;
 mod bliss_sorter;
 mod empty_sorter;
 mod field_sorter;
+mod radio_sorter;
 mod shuffle;
 
 pub use bliss_next_sorter::{
@@ -10,6 +11,7 @@ pub use bliss_next_sorter::{
 pub use bliss_sorter::{bliss_sort, BlissSorter, BlissSorterFactory, BlissSorterStatementFactory};
 pub use empty_sorter::{empty_sort, EmptySorter, EmptySorterFactory, EmptySorterStatementFactory};
 pub use field_sorter::{field_sort, FieldSorter, FieldSorterFactory, FieldSorterStatementFactory};
+pub use radio_sorter::{radio_sort, RadioSorter, RadioSorterFactory, RadioSorterStatementFactory};
 pub use shuffle::{
     shuffle_sort, ShuffleSorter, ShuffleSorterFactory, ShuffleSorterStatementFactory,
 };

interpreter/src/lang/vocabulary/sorters/radio_sorter.rs

@@ -0,0 +1,216 @@
+use std::collections::VecDeque;
+#[cfg(feature = "advanced")]
+use std::fmt::{Debug, Display, Error, Formatter};
+
+use rand::{thread_rng, Rng};
+
+use crate::lang::utility::{assert_name, check_name, assert_token_raw, assert_token};
+use crate::lang::SyntaxError;
+#[cfg(feature = "advanced")]
+use crate::lang::{IteratorItem, Op, RuntimeMsg, Sorter};
+use crate::lang::{LanguageDictionary, SortStatementFactory, SorterFactory};
+use crate::tokens::Token;
+#[cfg(feature = "advanced")]
+use crate::Item;
+#[cfg(feature = "advanced")]
+use crate::processing::advanced::MusicAnalyzerDistance;
+
+#[cfg(feature = "advanced")]
+#[derive(Debug)]
+pub struct RadioSorter {
+    up_to: usize,
+    algorithm_done: bool,
+    init_done: bool,
+    item_buf: VecDeque<Item>,
+    comparison: Option<MusicAnalyzerDistance>,
+}
+
+#[cfg(feature = "advanced")]
+impl std::clone::Clone for RadioSorter {
+    fn clone(&self) -> Self {
+        Self {
+            up_to: self.up_to,
+            algorithm_done: self.algorithm_done,
+            init_done: self.init_done,
+            item_buf: self.item_buf.clone(),
+            comparison: None,
+        }
+    }
+}
+
+#[cfg(feature = "advanced")]
+impl Default for RadioSorter {
+    fn default() -> Self {
+        Self {
+            up_to: usize::MAX,
+            algorithm_done: false,
+            init_done: false,
+            item_buf: VecDeque::new(),
+            comparison: None,
+        }
+    }
+}
+
+#[cfg(feature = "advanced")]
+impl Sorter for RadioSorter {
+    fn sort(
+        &mut self,
+        iterator: &mut dyn Op,
+        items_out: &mut VecDeque<IteratorItem>,
+    ) -> Result<(), RuntimeMsg> {
+        if !self.init_done {
+            // first run
+            self.init_done = true;
+            while let Some(item) = iterator.next() {
+                match item {
+                    Ok(item) => self.item_buf.push_back(item),
+                    Err(e) => items_out.push_back(Err(e)),
+                }
+                if self.item_buf.len() + items_out.len() >= self.up_to {
+                    break;
+                }
+            }
+            if !self.item_buf.is_empty() {
+                // choose (new) random first element
+                let random_num: usize = thread_rng().gen();
+                let random_i = random_num % self.item_buf.len();
+                self.item_buf.swap(random_i, 0);
+                // compare everything to new first element
+                let first = &self.item_buf[0];
+                let mut ctx = iterator.escape();
+                for i in 1..self.item_buf.len() {
+                    let item = &self.item_buf[i];
+                    if let Err(e) = ctx.analysis.prepare_distance(first, item) {
+                        iterator.enter(ctx);
+                        return Err(e);
+                    }
+                }
+                iterator.enter(ctx);
+                items_out.push_back(Ok(first.to_owned()));
+            }
+        } else {
+            #[allow(clippy::collapsible_else_if)]
+            if self.item_buf.len() > 2 {
+                let last = self.item_buf.pop_front().unwrap();
+                let mut best_index = 0;
+                let mut best_distance = f64::MAX;
+                let mut ctx = iterator.escape();
+                for i in 0..self.item_buf.len() {
+                    let current_item = &self.item_buf[i];
+                    if let Some(comp) = self.comparison.clone() {
+                        match ctx.analysis.get_custom_distance(&last, current_item, comp) {
+                            Err(e) => {
+                                iterator.enter(ctx);
+                                return Err(e);
+                            }
+                            Ok(distance) => {
+                                if distance < best_distance {
+                                    best_index = i;
+                                    best_distance = distance;
+                                }
+                            }
+                        }
+                    } else {
+                        match ctx.analysis.get_distance(&last, current_item) {
+                            Err(e) => {
+                                iterator.enter(ctx);
+                                return Err(e);
+                            }
+                            Ok(distance) => {
+                                if distance < best_distance {
+                                    best_index = i;
+                                    best_distance = distance;
+                                }
+                            }
+                        }
+                    }
+
+                }
+                if best_index != 0 {
+                    self.item_buf.swap(0, best_index);
+                }
+                items_out.push_back(Ok(self.item_buf[0].clone()));
+                let next = &self.item_buf[0];
+                for i in 1..self.item_buf.len() {
+                    let item = &self.item_buf[i];
+                    if let Err(e) = ctx.analysis.prepare_distance(next, item) {
+                        iterator.enter(ctx);
+                        return Err(e);
+                    }
+                }
+                iterator.enter(ctx);
+            } else if self.item_buf.len() == 2 {
+                self.item_buf.pop_front();
+                items_out.push_back(Ok(self.item_buf.pop_front().unwrap()));
+                // note item_buf is emptied here, so this will not proceed to len() == 1 case on next call
+            } else if !self.item_buf.is_empty() {
+                // edge case where item_buf only ever had 1 item
+                items_out.push_back(Ok(self.item_buf.pop_front().unwrap()));
+            }
+        }
+        Ok(())
+    }
+
+    fn reset(&mut self) {
+        self.init_done = false;
+    }
+}
+
+#[cfg(not(feature = "advanced"))]
+pub type RadioSorter = crate::lang::vocabulary::sorters::EmptySorter;
+
+#[cfg(feature = "advanced")]
+impl Display for RadioSorter {
+    fn fmt(&self, f: &mut Formatter) -> Result<(), Error> {
+        write!(f, "~ radio")
+    }
+}
+
+pub struct RadioSorterFactory;
+
+impl SorterFactory<RadioSorter> for RadioSorterFactory {
+    fn is_sorter(&self, tokens: &VecDeque<&Token>) -> bool {
+        tokens.len() > 1
+            && tokens[0].is_tilde()
+            && check_name("radio", tokens[1])
+    }
+
+    fn build_sorter(
+        &self,
+        tokens: &mut VecDeque<Token>,
+        _dict: &LanguageDictionary,
+    ) -> Result<RadioSorter, SyntaxError> {
+        assert_token_raw(Token::Tilde, tokens)?;
+        assert_name("radio", tokens)?;
+        #[allow(dead_code)]
+        let mode = if !tokens.is_empty() {
+            Some(assert_token(|t| match t {
+                Token::Name(n) => match &n as &str {
+                    "tempo" | "beat" => Some(MusicAnalyzerDistance::Tempo),
+                    "spectrum" | "s" => Some(MusicAnalyzerDistance::Spectrum),
+                    "loudness" | "volume" => Some(MusicAnalyzerDistance::Loudness),
+                    "chroma" | "c" => Some(MusicAnalyzerDistance::Chroma),
+                    _ => None
+                },
+                _ => None,
+            }, Token::Name("".into()), tokens)?)
+        } else {
+            None
+        };
+        #[cfg(not(feature = "advanced"))]
+        {Ok(RadioSorter::default())}
+        #[cfg(feature = "advanced")]
+        {Ok(RadioSorter {
+            comparison: mode,
+            ..Default::default()
+        })}
+    }
+}
+
+pub type RadioSorterStatementFactory =
+    SortStatementFactory<RadioSorter, RadioSorterFactory>;
+
+#[inline(always)]
+pub fn radio_sort() -> RadioSorterStatementFactory {
+    RadioSorterStatementFactory::new(RadioSorterFactory)
+}

interpreter/src/processing/mod.rs

@@ -27,5 +27,5 @@ pub mod general {
 
 #[cfg(feature = "advanced")]
 pub mod advanced {
-    pub use super::music_analysis::{DefaultAnalyzer, MusicAnalyzer};
+    pub use super::music_analysis::{DefaultAnalyzer, MusicAnalyzer, MusicAnalyzerDistance};
 }

interpreter/src/processing/music_analysis.rs

@@ -7,7 +7,7 @@ use std::sync::mpsc::{channel, Receiver, Sender};
 #[cfg(feature = "bliss-audio-symphonia")]
 use crate::lang::TypePrimitive;
 #[cfg(feature = "bliss-audio-symphonia")]
-use bliss_audio_symphonia::{BlissError, Song};
+use bliss_audio_symphonia::{BlissError, Song, AnalysisIndex};
 
 // assumed processor threads
 const DEFAULT_PARALLELISM: usize = 2;
@@ -23,6 +23,14 @@ use crate::Item;
 
 const PATH_FIELD: &str = "filename";
 
+#[derive(Debug, Clone)]
+pub enum MusicAnalyzerDistance {
+    Tempo,
+    Spectrum,
+    Loudness,
+    Chroma,
+}
+
 pub trait MusicAnalyzer: Debug + Send {
     fn prepare_distance(&mut self, from: &Item, to: &Item) -> Result<(), RuntimeMsg>;
 
@@ -30,6 +38,8 @@ pub trait MusicAnalyzer: Debug + Send {
 
     fn get_distance(&mut self, from: &Item, to: &Item) -> Result<f64, RuntimeMsg>;
 
+    fn get_custom_distance(&mut self, from: &Item, to: &Item, compare: MusicAnalyzerDistance) -> Result<f64, RuntimeMsg>;
+
     fn clear_cache(&mut self) -> Result<(), RuntimeMsg>;
 }
 
@@ -104,6 +114,32 @@ impl DefaultAnalyzer {
             })
             .map_err(|e| RuntimeMsg(format!("Channel send error: {}", e)))
     }
+
+    fn bliss_song_to_array(song: &Song) -> [f64; bliss_audio_symphonia::NUMBER_FEATURES] {
+        let analysis = &song.analysis;
+        [
+            analysis[AnalysisIndex::Tempo] as _,
+            analysis[AnalysisIndex::Zcr] as _,
+            analysis[AnalysisIndex::MeanSpectralCentroid] as _,
+            analysis[AnalysisIndex::StdDeviationSpectralCentroid] as _,
+            analysis[AnalysisIndex::MeanSpectralRolloff] as _,
+            analysis[AnalysisIndex::StdDeviationSpectralRolloff] as _,
+            analysis[AnalysisIndex::MeanSpectralFlatness] as _,
+            analysis[AnalysisIndex::StdDeviationSpectralFlatness] as _,
+            analysis[AnalysisIndex::MeanLoudness] as _,
+            analysis[AnalysisIndex::StdDeviationLoudness] as _,
+            analysis[AnalysisIndex::Chroma1] as _,
+            analysis[AnalysisIndex::Chroma2] as _,
+            analysis[AnalysisIndex::Chroma3] as _,
+            analysis[AnalysisIndex::Chroma4] as _,
+            analysis[AnalysisIndex::Chroma5] as _,
+            analysis[AnalysisIndex::Chroma6] as _,
+            analysis[AnalysisIndex::Chroma7] as _,
+            analysis[AnalysisIndex::Chroma8] as _,
+            analysis[AnalysisIndex::Chroma9] as _,
+            analysis[AnalysisIndex::Chroma10] as _,
+        ]
+    }
 }
 
 #[cfg(feature = "bliss-audio-symphonia")]
@@ -148,6 +184,78 @@ impl MusicAnalyzer for DefaultAnalyzer {
         ))
     }
 
+    fn get_custom_distance(&mut self, from: &Item, to: &Item, compare: MusicAnalyzerDistance) -> Result<f64, RuntimeMsg> {
+        self.request_song(from, true)?;
+        self.request_song(to, true)?;
+        let path_from = Self::get_path(from)?;
+        let path_to = Self::get_path(to)?;
+        let mut from_song = None;
+        let mut to_song = None;
+        for response in self.responses.iter() {
+            match response {
+                ResponseType::Distance { .. } => {},
+                ResponseType::Song {
+                    path,
+                    song
+                } => {
+                    if path_from == path {
+                        from_song = Some(song.map_err(|e| RuntimeMsg(format!("Bliss error: {}", e)))?);
+                    } else if path_to == path {
+                        to_song = Some(song.map_err(|e| RuntimeMsg(format!("Bliss error: {}", e)))?);
+                    }
+                    if to_song.is_some() && from_song.is_some() {
+                        break;
+                    }
+                },
+                ResponseType::UnsupportedSong { path, msg } => {
+                    if path == path_to || path == path_from {
+                        return Err(RuntimeMsg(format!("Bliss error: {}", msg)));
+                    }
+                }
+            }
+        }
+        if to_song.is_some() && from_song.is_some() {
+            let to_arr = Self::bliss_song_to_array(&to_song.unwrap());
+            let from_arr = Self::bliss_song_to_array(&from_song.unwrap());
+            Ok(match compare {
+                MusicAnalyzerDistance::Tempo => (
+                    (to_arr[AnalysisIndex::Tempo as usize] - from_arr[AnalysisIndex::Tempo as usize]).powi(2)
+                    + (to_arr[AnalysisIndex::Zcr as usize] - from_arr[AnalysisIndex::Zcr as usize]).powi(2)
+                ).sqrt(),
+                MusicAnalyzerDistance::Spectrum => (
+                    (to_arr[AnalysisIndex::MeanSpectralCentroid as usize] - from_arr[AnalysisIndex::MeanSpectralCentroid as usize]).powi(2)
+                    + (to_arr[AnalysisIndex::StdDeviationSpectralCentroid as usize] - from_arr[AnalysisIndex::StdDeviationSpectralCentroid as usize]).powi(2)
+                    + (to_arr[AnalysisIndex::MeanSpectralRolloff as usize] - from_arr[AnalysisIndex::MeanSpectralRolloff as usize]).powi(2)
+                    + (to_arr[AnalysisIndex::StdDeviationSpectralRolloff as usize] - from_arr[AnalysisIndex::StdDeviationSpectralRolloff as usize]).powi(2)
+                    + (to_arr[AnalysisIndex::MeanSpectralFlatness as usize] - from_arr[AnalysisIndex::MeanSpectralFlatness as usize]).powi(2)
+                    + (to_arr[AnalysisIndex::StdDeviationSpectralFlatness as usize] - from_arr[AnalysisIndex::StdDeviationSpectralFlatness as usize]).powi(2)
+                ).sqrt(),
+                MusicAnalyzerDistance::Loudness => {
+                    let mean_delta = to_arr[AnalysisIndex::MeanLoudness as usize] - from_arr[AnalysisIndex::MeanLoudness as usize];
+                    let deviation_delta = to_arr[AnalysisIndex::StdDeviationLoudness as usize] - from_arr[AnalysisIndex::StdDeviationLoudness as usize];
+
+                    (mean_delta.powi(2) + deviation_delta.powi(2)).sqrt()
+                },
+                MusicAnalyzerDistance::Chroma => (
+                    (to_arr[AnalysisIndex::Chroma1 as usize] - from_arr[AnalysisIndex::Chroma1 as usize]).powi(2)
+                    + (to_arr[AnalysisIndex::Chroma2 as usize] - from_arr[AnalysisIndex::Chroma2 as usize]).powi(2)
+                    + (to_arr[AnalysisIndex::Chroma3 as usize] - from_arr[AnalysisIndex::Chroma3 as usize]).powi(2)
+                    + (to_arr[AnalysisIndex::Chroma4 as usize] - from_arr[AnalysisIndex::Chroma4 as usize]).powi(2)
+                    + (to_arr[AnalysisIndex::Chroma5 as usize] - from_arr[AnalysisIndex::Chroma5 as usize]).powi(2)
+                    + (to_arr[AnalysisIndex::Chroma6 as usize] - from_arr[AnalysisIndex::Chroma6 as usize]).powi(2)
+                    + (to_arr[AnalysisIndex::Chroma7 as usize] - from_arr[AnalysisIndex::Chroma7 as usize]).powi(2)
+                    + (to_arr[AnalysisIndex::Chroma8 as usize] - from_arr[AnalysisIndex::Chroma8 as usize]).powi(2)
+                    + (to_arr[AnalysisIndex::Chroma9 as usize] - from_arr[AnalysisIndex::Chroma9 as usize]).powi(2)
+                    + (to_arr[AnalysisIndex::Chroma10 as usize] - from_arr[AnalysisIndex::Chroma10 as usize]).powi(2)
+                ).sqrt(),
+            })
+        } else {
+            Err(RuntimeMsg(
+                "Channel closed without complete response: internal error".to_owned(),
+            ))
+        }
+    }
+
     fn clear_cache(&mut self) -> Result<(), RuntimeMsg> {
         self.requests
             .send(RequestType::Clear {})
@@ -161,15 +269,19 @@ pub struct DefaultAnalyzer {}
 
 #[cfg(not(feature = "bliss-audio-symphonia"))]
 impl MusicAnalyzer for DefaultAnalyzer {
-    fn prepare_distance(&mut self, from: &Item, to: &Item) -> Result<(), RuntimeMsg> {
+    fn prepare_distance(&mut self, _from: &Item, _to: &Item) -> Result<(), RuntimeMsg> {
         Ok(())
     }
 
-    fn prepare_item(&mut self, item: &Item) -> Result<(), RuntimeMsg> {
+    fn prepare_item(&mut self, _item: &Item) -> Result<(), RuntimeMsg> {
         Ok(())
     }
 
-    fn get_distance(&mut self, item: &Item) -> Result<f64, RuntimeMsg> {
+    fn get_distance(&mut self, _from: &Item, _to: &Item) -> Result<f64, RuntimeMsg> {
+        Ok(f64::MAX)
+    }
+
+    fn get_custom_distance(&mut self, _from: &Item, _to: &Item, _compare: MusicAnalyzerDistance) -> Result<f64, RuntimeMsg> {
         Ok(f64::MAX)
     }
 

interpreter/tests/single_line.rs

@@ -379,6 +379,11 @@ fn execute_blissfirstsort_line() -> Result<(), InterpreterError> {
         "files(`~/Music/MusicFlac/Bruno Mars/24K Magic/`)~(advanced bliss_first)",
         false,
         true,
+    )?;
+    execute_single_line(
+        "files(`~/Music/MusicFlac/Bruno Mars/24K Magic/`)~(~bliss_first)",
+        false,
+        true,
     )
 }
 
@@ -388,6 +393,20 @@ fn execute_blissnextsort_line() -> Result<(), InterpreterError> {
         "files(`~/Music/MusicFlac/Bruno Mars/24K Magic/`)~(advanced bliss_next)",
         false,
         true,
+    )?;
+    execute_single_line(
+        "files(`~/Music/MusicFlac/Bruno Mars/24K Magic/`)~(~bliss_next)",
+        false,
+        true,
+    )
+}
+
+#[test]
+fn execute_radiosort_line() -> Result<(), InterpreterError> {
+    execute_single_line(
+        "files(`~/Music/MusicFlac/Bruno Mars/24K Magic/`)~(~radio)",
+        false,
+        true,
     )
 }
 

player/Cargo.toml

@@ -6,9 +6,8 @@ license = "LGPL-2.1-only OR GPL-3.0-only"
 readme = "README.md"
 
 [dependencies]
-rodio = { version = "^0.16", features = ["symphonia-all"]}
+rodio = { version = "^0.16", features = ["symphonia-all"], default-features = false}
 m3u8-rs = { version = "^3.0" }
-fluent-uri = { version = "^0.1" }
 mpd = { version = "0.0.12", optional = true }
 
 # local

player/src/player_wrapper.rs

@@ -72,7 +72,7 @@ impl<I: std::iter::Iterator<Item = Result<Item, InterpreterError>>> PlayerServer
                 std::thread::spawn(move || {
                     let sample_rate = source_in2.sample_rate();
                     let channels = source_in2.channels() as u32;
-                    let sample_count = source_in2.clone().count() as f64;
+                    let sample_count = source_in2.count() as f64;
                     let duration = std::time::Duration::from_secs_f64(sample_count / ((sample_rate * channels) as f64));
                     event3.lock().map(|event|
                         event.send(