bobbicodes/core.clj

## core.clj
(ns ring-app.core
  (:require [clojure.java.shell :as sh]
            [ring.adapter.jetty :as jetty]
            [ring.util.response :as response]
            [ring.middleware.resource :as resource]
            [clojure.pprint     :as pprint]))

(defonce server (atom nil))

(defn cents
  "The pitch command takes a number of cents to shift.
  Outputs the shift for midi note n as a string."
  [n]
  (str  (if (< 59 n)
      (* 100 (- n 60))
      (- (* 100 (- 60 n))))))


(cents 58)

(defn pitch
 "Takes an integer and filename (optional)
  and creates a copy transposed to midi note n.
  Outputs a file named `<f>-n.wav`"
  ([n]
  (str (:out (sh/sh "sox" "resources/audio/1.wav"
                    (str "resources/audio/1-" n ".wav")
                    "pitch" (cents n)))
                    (str "wrote 1-" n ".wav" )))
  ([n f]
  (str (:out (sh/sh "sox" (str "resources/audio/" f ".wav" )
                    (str "resources/audio/" f "-" n ".wav")
                    "pitch" (cents n)))
                    (str "wrote " f "-" n ".wav" ))))


(defn explode!
  "Takes a `.wav` file and explodes it into a set of
  transpositions n notes before/after 60."
  [f n]
  (doseq [note (range (- 60 n) (+ 60 n))]
        (pitch note f)))

(comment
  (def n 62)
  (def f "1")
  (pitch n f)
  (explode! f 4)
  )


(defn app [req]
  (case (:uri req)
    "/" {:status 200
         :body "<h1>Homepage</h1>
                <audio controls src=\"2.wav\"></audio>
                <ul>
                    <li><a href=\"/echo\">Echo request</a></li>
                    <li><a href=\"/greeting\">Greeting</a></li>
                </ul>"
         :headers {"Content-Type" "text/html; charset=UTF-8"}}
    "/echo" {:status 200
             :body (str (with-out-str (pprint/pprint req))
                        (:out (sh/sh "ls" "resources/audio")))
             :headers {"Content-Type" "text/plain"}}
    "/pitch" {:status 200
              :body
              (str "<html><body>"
                    (pitch n f)
                     (str "<audio controls src=\"/" "1-" n ".wav\"></audio></body></html>"))
             :headers {"Content-Type" "text/html; charset=UTF-8"}}
   "/greeting" {:status 200
                 :body "<html><body><audio controls src=\"/2.wav\"></audio></body></html>"
                 :headers {"Content-Type" "text/html; charset=UTF-8"}}
    {:status 404
     :body "Not found."
     :headers {"Content-Type" "text/plain"}}))

(defn start-server []
  (reset! server
          (jetty/run-jetty
            (resource/wrap-resource
              (fn [req] (app req)) "audio")
              {:port 80 :join? false})))

(defn stop-server []
  (when-some [s @server] ;; check if there is an object in the atom
    (.stop s)            ;; call the .stop method
    (reset! server nil)));; overwrite the atom with nil

(defn -main []
  (start-server))

(comment
  (stop-server)
  )
	(ns ring-app.core
	(:require [clojure.java.shell :as sh]
	[ring.adapter.jetty :as jetty]
	[ring.util.response :as response]
	[ring.middleware.resource :as resource]
	[clojure.pprint :as pprint]))

	(defonce server (atom nil))

	(defn cents
	"The pitch command takes a number of cents to shift.
	Outputs the shift for midi note n as a string."
	[n]
	(str (if (< 59 n)
	(* 100 (- n 60))
	(- (* 100 (- 60 n))))))


	(cents 58)

	(defn pitch
	"Takes an integer and filename (optional)
	and creates a copy transposed to midi note n.
	Outputs a file named `<f>-n.wav`"
	([n]
	(str (:out (sh/sh "sox" "resources/audio/1.wav"
	(str "resources/audio/1-" n ".wav")
	"pitch" (cents n)))
	(str "wrote 1-" n ".wav" )))
	([n f]
	(str (:out (sh/sh "sox" (str "resources/audio/" f ".wav" )
	(str "resources/audio/" f "-" n ".wav")
	"pitch" (cents n)))
	(str "wrote " f "-" n ".wav" ))))


	(defn explode!
	"Takes a `.wav` file and explodes it into a set of
	transpositions n notes before/after 60."
	[f n]
	(doseq [note (range (- 60 n) (+ 60 n))]
	(pitch note f)))

	(comment
	(def n 62)
	(def f "1")
	(pitch n f)
	(explode! f 4)
	)


	(defn app [req]
	(case (:uri req)
	"/" {:status 200
	:body "<h1>Homepage</h1>
	<audio controls src=\"2.wav\"></audio>
	<ul>
	<li><a href=\"/echo\">Echo request</a></li>
	<li><a href=\"/greeting\">Greeting</a></li>
	</ul>"
	:headers {"Content-Type" "text/html; charset=UTF-8"}}
	"/echo" {:status 200
	:body (str (with-out-str (pprint/pprint req))
	(:out (sh/sh "ls" "resources/audio")))
	:headers {"Content-Type" "text/plain"}}
	"/pitch" {:status 200
	:body
	(str "<html><body>"
	(pitch n f)
	(str "<audio controls src=\"/" "1-" n ".wav\"></audio></body></html>"))
	:headers {"Content-Type" "text/html; charset=UTF-8"}}
	"/greeting" {:status 200
	:body "<html><body><audio controls src=\"/2.wav\"></audio></body></html>"
	:headers {"Content-Type" "text/html; charset=UTF-8"}}
	{:status 404
	:body "Not found."
	:headers {"Content-Type" "text/plain"}}))

	(defn start-server []
	(reset! server
	(jetty/run-jetty
	(resource/wrap-resource
	(fn [req] (app req)) "audio")
	{:port 80 :join? false})))

	(defn stop-server []
	(when-some [s @server] ;; check if there is an object in the atom
	(.stop s) ;; call the .stop method
	(reset! server nil)));; overwrite the atom with nil

	(defn -main []
	(start-server))

	(comment
	(stop-server)
	)