refactor sampler, flatten arranger

crates/sampler/src/sampler_model.rs

@@ -0,0 +1,149 @@
+use crate::*;
+
+/// The sampler device plays sounds in response to MIDI notes.
+#[derive(Debug)]
+pub struct Sampler {
+    pub name:        String,
+    pub mapped:      [Option<Arc<RwLock<Sample>>>;128],
+    pub recording:   Option<(usize, Arc<RwLock<Sample>>)>,
+    pub unmapped:    Vec<Arc<RwLock<Sample>>>,
+    pub voices:      Arc<RwLock<Vec<Voice>>>,
+    pub midi_in:     Option<JackMidiIn>,
+    pub audio_ins:   Vec<JackAudioIn>,
+    pub input_meter: Vec<f32>,
+    pub audio_outs:  Vec<JackAudioOut>,
+    pub buffer:      Vec<Vec<f32>>,
+    pub output_gain: f32,
+    pub cursor:  (usize, usize),
+    pub editing: Option<Arc<RwLock<Sample>>>,
+    pub mode:    Option<SamplerMode>,
+    /// Size of actual notes area
+    pub size:    Measure<TuiOut>,
+    /// Lowest note displayed
+    pub note_lo: AtomicUsize,
+    pub note_pt: AtomicUsize,
+    pub color:   ItemPalette
+}
+
+impl Default for Sampler {
+    fn default () -> Self {
+        Self {
+            midi_in:     None,
+            audio_ins:   vec![],
+            input_meter: vec![0.0;2],
+            audio_outs:  vec![],
+            name:        "tek_sampler".to_string(),
+            mapped:      [const { None };128],
+            unmapped:    vec![],
+            voices:      Arc::new(RwLock::new(vec![])),
+            buffer:      vec![vec![0.0;16384];2],
+            output_gain: 1.,
+            recording:   None,
+            mode:        None,
+            cursor:      (0, 0),
+            editing:     None,
+            size:        Default::default(),
+            note_lo:     0.into(),
+            note_pt:     0.into(),
+            color:       Default::default(),
+        }
+    }
+}
+
+impl Sampler {
+    pub fn new (
+        jack:       &Jack,
+        name:       impl AsRef<str>,
+        midi_from:  &[PortConnect],
+        audio_from: &[&[PortConnect];2],
+        audio_to:   &[&[PortConnect];2],
+    ) -> Usually<Self> {
+        let name = name.as_ref();
+        Ok(Self {
+            midi_in: Some(JackMidiIn::new(jack, format!("M/{name}"), midi_from)?),
+            audio_ins: vec![
+                JackAudioIn::new(jack, &format!("L/{name}"), audio_from[0])?,
+                JackAudioIn::new(jack, &format!("R/{name}"), audio_from[1])?,
+            ],
+            audio_outs: vec![
+                JackAudioOut::new(jack, &format!("{name}/L"), audio_to[0])?,
+                JackAudioOut::new(jack, &format!("{name}/R"), audio_to[1])?,
+            ],
+            ..Default::default()
+        })
+    }
+    pub fn cancel_recording (&mut self) {
+        self.recording = None;
+    }
+    pub fn begin_recording (&mut self, index: usize) {
+        self.recording = Some((
+            index,
+            Arc::new(RwLock::new(Sample::new("Sample", 0, 0, vec![vec![];self.audio_ins.len()])))
+        ));
+    }
+    pub fn finish_recording (&mut self) -> Option<Arc<RwLock<Sample>>> {
+        let recording = self.recording.take();
+        if let Some((index, sample)) = recording {
+            let old = self.mapped[index].clone();
+            self.mapped[index] = Some(sample);
+            old
+        } else {
+            None
+        }
+    }
+    /// Immutable reference to sample at cursor.
+    pub fn sample (&self) -> Option<&Arc<RwLock<Sample>>> {
+        for (i, sample) in self.mapped.iter().enumerate() {
+            if i == self.cursor.0 {
+                return sample.as_ref()
+            }
+        }
+        for (i, sample) in self.unmapped.iter().enumerate() {
+            if i + self.mapped.len() == self.cursor.0 {
+                return Some(sample)
+            }
+        }
+        None
+    }
+}
+
+/// A sound sample.
+#[derive(Default, Debug)]
+pub struct Sample {
+    pub name:     Arc<str>,
+    pub start:    usize,
+    pub end:      usize,
+    pub channels: Vec<Vec<f32>>,
+    pub rate:     Option<usize>,
+    pub gain:     f32,
+}
+
+impl Sample {
+    pub fn new (name: impl AsRef<str>, start: usize, end: usize, channels: Vec<Vec<f32>>) -> Self {
+        Self { name: name.as_ref().into(), start, end, channels, rate: None, gain: 1.0 }
+    }
+    pub fn play (sample: &Arc<RwLock<Self>>, after: usize, velocity: &u7) -> Voice {
+        Voice {
+            sample: sample.clone(),
+            after,
+            position: sample.read().unwrap().start,
+            velocity: velocity.as_int() as f32 / 127.0,
+        }
+    }
+}
+
+/// A currently playing instance of a sample.
+#[derive(Default, Debug, Clone)]
+pub struct Voice {
+    pub sample:   Arc<RwLock<Sample>>,
+    pub after:    usize,
+    pub position: usize,
+    pub velocity: f32,
+}
+
+#[derive(Debug)]
+pub enum SamplerMode {
+    // Load sample from path
+    Import(usize, FileBrowser),
+}
+