From 2ef9628ab8e9a13a97fcd047c501745e73d270a5 Mon Sep 17 00:00:00 2001
From: unspeaker <hora.nqma@protonmail.com>
Date: Sat, 10 May 2025 21:44:27 +0300
Subject: [PATCH] device: add RMSMeter

---
 crates/device/Cargo.toml   |  3 ++-
 crates/device/src/meter.rs | 16 ++++++++++++++++
 2 files changed, 18 insertions(+), 1 deletion(-)
 create mode 100644 crates/device/src/meter.rs

diff --git a/crates/device/Cargo.toml b/crates/device/Cargo.toml
index aacae057..0f8b2230 100644
--- a/crates/device/Cargo.toml
+++ b/crates/device/Cargo.toml
@@ -19,8 +19,9 @@ winit     = { workspace = true, optional = true }
 default   = [ "clock", "editor", "sequencer", "sampler", "lv2" ]
 clock     = []
 editor    = []
+meter     = []
 sequencer = [ "clock", "uuid" ]
-sampler   = [ "symphonia", "wavers" ]
+sampler   = [ "meter", "symphonia", "wavers" ]
 lv2       = [ "livi", "winit" ]
 vst2      = []
 vst3      = []
diff --git a/crates/device/src/meter.rs b/crates/device/src/meter.rs
new file mode 100644
index 00000000..74dba443
--- /dev/null
+++ b/crates/device/src/meter.rs
@@ -0,0 +1,16 @@
+use crate::*;
+
+#[derive(Debug, Default, Clone)]
+pub struct RMSMeter(f32);
+
+impl RMSMeter {
+    pub fn set (&mut self, samples: &[u32]) {
+        let sum: usize = samples.iter().map(|s|*s as usize).reduce(|sum, sample|sum + sample)
+            .unwrap_or(0);
+        self.0 = (sum as f32 / samples.len() as f32).sqrt();
+    }
+}
+
+render!(TuiOut: |self: RMSMeter, to| {
+    let [x, y, w, h] = to.area();
+});