From 6941c17f5261173a2f7d09771cde8625bf41257e Mon Sep 17 00:00:00 2001
From: annieversary <annnnnie@protonmail.com>
Date: Sat, 11 Sep 2021 12:44:46 +0200
Subject: [PATCH] [velociter] create and implement crate

---
 README.md                   | 11 +++++
 crates/velociter/Cargo.toml | 14 +++++++
 crates/velociter/src/lib.rs | 84 +++++++++++++++++++++++++++++++++++++
 3 files changed, 109 insertions(+)
 create mode 100644 crates/velociter/Cargo.toml
 create mode 100644 crates/velociter/src/lib.rs

diff --git a/README.md b/README.md
index 435e2c5..b7a3ff8 100644
--- a/README.md
+++ b/README.md
@@ -65,6 +65,7 @@ the following is the current list of plugins
 - `transmute_pitch`: pitch to midi converter
 - `reverter`: play sound backwards
 - `panera`: pan individual notes differently
+- `velociter`: random velocity setter
 
 there's a bit of an explanation of each of the plugins below, but it's not a thorough documentation or a manual, it's just a bunch of notes i've written and a short description of the parameters
 
@@ -287,6 +288,16 @@ there's three panning modes:
 
 the peak detector is still a bit fiddly, so you'll have to tweak the params a bit until it works for the kind of sound you're giving it. the defaults have worked great for me, so i recommend you start from there and change as you see fit
 
+### velociter
+
+velociter sets random velocities to midi notes
+
+params:
+- `min_vel`: minimum velocity
+- `max_vel`: maximum velocity
+
+it'll set the velocity of every incoming midi note to be in the range `[min_vel, max_vel)`
+
 ## contributing
 
 issues and prs are welcome, but please open an issue before making any big pr, i don't wanna have to reject a pr where you have put a lot of effort on. if you are fine with that, ig go ahead i'm not your mum
diff --git a/crates/velociter/Cargo.toml b/crates/velociter/Cargo.toml
new file mode 100644
index 0000000..63be850
--- /dev/null
+++ b/crates/velociter/Cargo.toml
@@ -0,0 +1,14 @@
+[package]
+name = "velociter"
+version = "0.1.0"
+edition = "2018"
+
+[lib]
+crate-type = ["cdylib"]
+
+[dependencies]
+baseplug = { git = "https://github.com/wrl/baseplug.git", rev = "9cec68f31cca9c0c7a1448379f75d92bbbc782a8" }
+rand = "0.8.4"
+serde = "1.0.126"
+
+# utils = { path = "../utils" }
diff --git a/crates/velociter/src/lib.rs b/crates/velociter/src/lib.rs
new file mode 100644
index 0000000..6d63f2f
--- /dev/null
+++ b/crates/velociter/src/lib.rs
@@ -0,0 +1,84 @@
+#![allow(incomplete_features)]
+#![feature(generic_associated_types)]
+
+use baseplug::{event::Data, Event, MidiReceiver, Plugin, ProcessContext};
+use serde::{Deserialize, Serialize};
+
+baseplug::model! {
+    #[derive(Debug, Serialize, Deserialize)]
+    struct VelociterModel {
+        #[model(min = 0.0, max = 127.9)]
+        #[parameter(name = "min_vel")]
+        min_vel: f32,
+        #[model(min = 0.0, max = 127.9)]
+        #[parameter(name = "max_vel")]
+        max_vel: f32,
+    }
+}
+
+impl Default for VelociterModel {
+    fn default() -> Self {
+        Self {
+            min_vel: 0.0,
+            max_vel: 127.9,
+        }
+    }
+}
+
+struct Velociter {
+    notes: Vec<[u8; 3]>,
+}
+
+impl Plugin for Velociter {
+    const NAME: &'static str = "velociter";
+    const PRODUCT: &'static str = "velociter";
+    const VENDOR: &'static str = "unnieversal";
+
+    const INPUT_CHANNELS: usize = 2;
+    const OUTPUT_CHANNELS: usize = 2;
+
+    type Model = VelociterModel;
+
+    #[inline]
+    fn new(_sample_rate: f32, _model: &VelociterModel) -> Self {
+        Self {
+            notes: Vec::with_capacity(300),
+        }
+    }
+
+    #[inline]
+    fn process(&mut self, model: &VelociterModelProcess, ctx: &mut ProcessContext<Self>) {
+        let input = &ctx.inputs[0].buffers;
+        let output = &mut ctx.outputs[0].buffers;
+        let enqueue_midi = &mut ctx.enqueue_event;
+
+        use rand::{thread_rng, Rng};
+        let mut rng = thread_rng();
+
+        for i in 0..ctx.nframes {
+            output[0][i] = input[0][i];
+            output[1][i] = input[1][i];
+
+            let min = model.min_vel[i];
+            let max = model.max_vel[i];
+            // make sure they're right
+            let (min, max) = (min.min(max), max.max(min));
+
+            for mut note in self.notes.drain(0..) {
+                note[2] = rng.gen_range(min..max).trunc() as u8;
+                let note = Event::<Velociter> {
+                    frame: 0,
+                    data: Data::Midi(note),
+                };
+                enqueue_midi(note);
+            }
+        }
+    }
+}
+impl MidiReceiver for Velociter {
+    fn midi_input(&mut self, _model: &VelociterModelProcess, data: [u8; 3]) {
+        self.notes.push(data);
+    }
+}
+
+baseplug::vst2!(Velociter, b"tAnE");