strudel cli poc

repl/.gitignore

@@ -23,4 +23,5 @@ dist-ssr
 *.sln
 *.sw?
 
-oldtunes.mjs
+oldtunes.mjs
+public/samples/EMU World

server/.gitignore

@@ -0,0 +1 @@
+samples/old

server/headline.js

@@ -0,0 +1,24 @@
+const headlines = [
+  `
+  ██████ ▄▄▄█████▓ ██▀███   █    ██ ▓█████▄ ▓█████  ██▓    
+▒██    ▒ ▓  ██▒ ▓▒▓██ ▒ ██▒ ██  ▓██▒▒██▀ ██▌▓█   ▀ ▓██▒    
+░ ▓██▄   ▒ ▓██░ ▒░▓██ ░▄█ ▒▓██  ▒██░░██   █▌▒███   ▒██░    
+  ▒   ██▒░ ▓██▓ ░ ▒██▀▀█▄  ▓▓█  ░██░░▓█▄   ▌▒▓█  ▄ ▒██░    
+▒██████▒▒  ▒██▒ ░ ░██▓ ▒██▒▒▒█████▓ ░▒████▓ ░▒████▒░██████▒
+▒ ▒▓▒ ▒ ░  ▒ ░░   ░ ▒▓ ░▒▓░░▒▓▒ ▒ ▒  ▒▒▓  ▒ ░░ ▒░ ░░ ▒░▓  ░
+░ ░▒  ░ ░    ░      ░▒ ░ ▒░░░▒░ ░ ░  ░ ▒  ▒  ░ ░  ░░ ░ ▒  ░
+░  ░  ░    ░        ░░   ░  ░░░ ░ ░  ░ ░  ░    ░     ░ ░   
+      ░              ░        ░        ░       ░  ░    ░  ░
+                                     ░                     `,
+  `
+
+  ███████╗████████╗██████╗ ██╗   ██╗██████╗ ███████╗██╗     
+  ██╔════╝╚══██╔══╝██╔══██╗██║   ██║██╔══██╗██╔════╝██║     
+  ███████╗   ██║   ██████╔╝██║   ██║██║  ██║█████╗  ██║     
+  ╚════██║   ██║   ██╔══██╗██║   ██║██║  ██║██╔══╝  ██║     
+  ███████║   ██║   ██║  ██║╚██████╔╝██████╔╝███████╗███████╗
+  ╚══════╝   ╚═╝   ╚═╝  ╚═╝ ╚═════╝ ╚═════╝ ╚══════╝╚══════╝
+`,
+];
+
+export const randomHeadline = () => headlines[Math.floor(Math.random() * headlines.length)];

server/package-lock.json

@@ -0,0 +1,677 @@
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+  "name": "@strudel.cycles/server",
+  "version": "0.0.1",
+  "lockfileVersion": 2,
+  "requires": true,
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+        "web-audio-api": "^0.2.2"
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+}

server/package.json

@@ -0,0 +1,17 @@
+{
+  "name": "@strudel.cycles/server",
+  "version": "0.0.1",
+  "description": "Experimental Strudel node server",
+  "main": "server.js",
+  "type": "module",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1",
+    "start": "node server.js"
+  },
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "speaker": "^0.5.4",
+    "web-audio-api": "^0.2.2"
+  }
+}

server/repl.js

@@ -0,0 +1,76 @@
+import repl from 'repl';
+import { evalScope, evaluate } from '@strudel.cycles/eval';
+import { AudioContext } from 'web-audio-api';
+import Speaker from 'speaker';
+import controls from '@strudel.cycles/core/controls.mjs';
+import { prepareSamples, playBuffer } from './sampler.js';
+import { randomHeadline } from './headline.js';
+
+/*
+  This is just a POC of how a strudel cli / repl could look like 
+*/
+
+// setup audio
+const context = new AudioContext();
+context.outStream = new Speaker({
+  channels: context.format.numberOfChannels,
+  bitDepth: context.format.bitDepth,
+  sampleRate: context.sampleRate,
+});
+console.log('now loading samples..');
+const buffers = await prepareSamples(context, './samples/');
+console.log('');
+
+// scheduler
+let tick = 0;
+const slice = 0.5;
+const latency = 1;
+/* console.log('latency', latency);
+console.log('querying every', slice, 's'); */
+const offset = context.currentTime + latency;
+let pattern;
+setInterval(() => {
+  if (pattern) {
+    try {
+      pattern
+        .queryArc(tick * slice, ++tick * slice)
+        .filter((hap) => hap.hasOnset())
+        .forEach((hap) => {
+          const t = hap.whole.begin.valueOf() + offset;
+          const { s, n } = hap.value;
+          const bank = buffers[s];
+          if (bank?.length) {
+            const index = (n ?? 0) % bank.length;
+            playBuffer(context, bank[index], t);
+          }
+        });
+    } catch (err) {
+      console.error('query error', err);
+    }
+  }
+}, slice * 1000);
+
+await evalScope(controls, import('@strudel.cycles/core'), import('@strudel.cycles/mini'));
+console.log(`${randomHeadline()}
+
+welcome to the experimental strudel cli <3
+
+available samples: ${Object.entries(buffers)
+  .map(([key, samples]) => `${key} (${samples.length})`)
+  .join(', ')}   
+you can add samples to the samples folder (.wav, .ogg, .mp3)
+
+please enter a pattern, e.g. s("bd(3,8),~ sd,hh(3,8,1)")
+`);
+// repl
+repl.start({
+  prompt: '>>>',
+  eval: async function myEval(cmd, context, filename, callback) {
+    try {
+      pattern = (await evaluate(cmd)).pattern;
+    } catch (err) {
+      console.error('query error', err.message);
+    }
+    callback(null);
+  },
+});

server/sampler.js

@@ -0,0 +1,41 @@
+import fs from 'fs';
+
+export const loadSample = (context, path) => {
+  console.log(`load sample: ${path}`);
+  return new Promise((resolve, reject) => {
+    fs.readFile(new URL(path, import.meta.url), function (err, buffer) {
+      if (err) reject(err);
+      context.decodeAudioData(buffer, resolve);
+    });
+  });
+};
+
+export async function prepareSamples(context, path, ignore = ['.DS_Store', 'Thumbs.db']) {
+  const ignored = (filename) => !ignore.includes(filename);
+  const folders = fs.readdirSync(path).filter(ignored);
+  return Object.fromEntries(
+    await Promise.all(
+      folders.map(async (folder) => {
+        return [
+          folder,
+          await Promise.all(
+            fs
+              .readdirSync(path + folder)
+              .filter(ignored)
+              .map((filename) => path + folder + '/' + filename)
+              .map((filepath) => loadSample(context, filepath)),
+          ),
+        ];
+      }, []),
+    ),
+  );
+}
+
+export const playBuffer = (context, audioBuffer, start = 0) => {
+  const bufferNode = context.createBufferSource();
+  bufferNode.connect(context.destination);
+  bufferNode.buffer = audioBuffer;
+  bufferNode.loop = false;
+  bufferNode.start(start);
+  bufferNode.stop(start + audioBuffer.length / audioBuffer.sampleRate);
+};