From 25467cc7d96c56eb2b739a3ffb093ab5a9c57b13 Mon Sep 17 00:00:00 2001
From: Tim Redfern <tim@getdrop.com>
Date: Tue, 15 Nov 2022 01:48:26 +0000
Subject: testing oscilloscope latency

---
 audioin/src/main.cpp  |  13 +++++
 audioin/src/ofApp.cpp | 144 ++++++++++++++++++++++++++++++++++++++++++++++++++
 audioin/src/ofApp.h   |  68 ++++++++++++++++++++++++
 3 files changed, 225 insertions(+)
 create mode 100644 audioin/src/main.cpp
 create mode 100644 audioin/src/ofApp.cpp
 create mode 100644 audioin/src/ofApp.h

(limited to 'audioin/src')

diff --git a/audioin/src/main.cpp b/audioin/src/main.cpp
new file mode 100644
index 0000000..e57370b
--- /dev/null
+++ b/audioin/src/main.cpp
@@ -0,0 +1,13 @@
+#include "ofMain.h"
+#include "ofApp.h"
+
+//========================================================================
+int main( ){
+	ofSetupOpenGL(1024,768,OF_WINDOW);			// <-------- setup the GL context
+
+	// this kicks off the running of my app
+	// can be OF_WINDOW or OF_FULLSCREEN
+	// pass in width and height too:
+	ofRunApp(new ofApp());
+
+}
diff --git a/audioin/src/ofApp.cpp b/audioin/src/ofApp.cpp
new file mode 100644
index 0000000..4535c3c
--- /dev/null
+++ b/audioin/src/ofApp.cpp
@@ -0,0 +1,144 @@
+#include "ofApp.h"
+void ofApp::setup(){
+
+    int frameRate=60;
+    
+    ofSetFrameRate(frameRate);
+    ofBackground(0);
+    ofEnableSmoothing();
+    ofEnableAlphaBlending();
+    ofSetVerticalSync(true);
+
+    blockSize = SAMPLERATE / (frameRate*20); //200
+
+    soundStream.setup(this,0, 1, SAMPLERATE, blockSize, 1);
+
+    buffer=Buffer(SAMPLERATE);
+
+    vScale=3.0f;
+    hScale=8.0f;
+  
+}
+void ofApp::update(){
+    
+ 
+}
+
+int sampleNum=0;
+int frameNum=0;
+
+void ofApp::draw(){
+    ofBackground(0);
+
+    ofPushMatrix();
+
+    ofTranslate(0,ofGetHeight()/2);
+
+    ofScale(1.0f,ofGetHeight()*vScale);
+
+    ofPolyline line;
+    line.addVertex(0,buffer[0]);
+
+    float i=0.0f;
+    while (i<ofGetWidth()){
+        line.curveTo(i,buffer[(int)i]);
+        i+=hScale;
+    }
+
+    line.draw();
+
+    ofPopMatrix();
+    
+    frameNum++;
+
+}
+
+
+
+void ofApp::audioIn(float * input, int blockSize, int nChannels){
+   //ofLog()<< "frame "<<frameNum<<" ,got blockr "<<sampleNum++<<" , "<<nChannels<<" channels "<<blockSize<<" samples";    
+   
+//    for (int i=0;i<blockSize;i++){
+//        buffer.push_front()
+//    }
+
+    //ofLog()<< "samples: "<<input[0]<<" "<<input[1]<<" "<<input[2]<<" ";
+
+    buffer.add(input,blockSize);
+
+}
+
+
+
+
+//--------------------------------------------------------------
+void ofApp::keyPressed(int key){
+    switch(key){
+        case 'f':{
+            ofToggleFullscreen();
+            break;
+        }
+        case 'i':{
+            vScale*=1.1f;
+            ofLog()<< "vScale: "<<vScale;
+            break;
+        }
+        case 'm':{
+            vScale/=1.1f;
+            ofLog()<< "vScale: "<<vScale;
+            break;
+        }
+        case 'j':{
+            hScale*=1.1f;
+            ofLog()<< "hScale: "<<hScale;
+            break;
+        }
+        case 'k':{
+            hScale/=1.1f;
+            ofLog()<< "hScale: "<<hScale;
+            break;
+        }
+        default:
+            break;
+    }
+
+}
+
+//--------------------------------------------------------------
+void ofApp::keyReleased(int key){
+
+}
+
+//--------------------------------------------------------------
+void ofApp::mouseMoved(int x, int y ){
+
+}
+
+void ofApp::mouseDragged(int x, int y, int button){
+ 
+}
+
+//--------------------------------------------------------------
+void ofApp::mousePressed(int x, int y, int button){
+
+}
+
+//--------------------------------------------------------------
+void ofApp::mouseReleased(int x, int y, int button){
+
+}
+
+//--------------------------------------------------------------
+void ofApp::windowResized(int w, int h){
+
+}
+
+//--------------------------------------------------------------
+void ofApp::gotMessage(ofMessage msg){
+
+}
+
+//--------------------------------------------------------------
+void ofApp::dragEvent(ofDragInfo dragInfo){
+
+}
diff --git a/audioin/src/ofApp.h b/audioin/src/ofApp.h
new file mode 100644
index 0000000..cecc23e
--- /dev/null
+++ b/audioin/src/ofApp.h
@@ -0,0 +1,68 @@
+#pragma once
+
+#include "ofMain.h"
+
+#include <baudvine/ringbuf.h>
+
+#define SAMPLERATE 48000
+#define min(a,b) (a<b?a:b)
+
+class Buffer{
+public:
+    Buffer(size_t sz=0){
+        if (sz){
+            data =new float[sz];
+            size=sz;
+        }
+    }
+    ~Buffer(){
+        delete data;
+    }
+    void add(float * input, int num){
+        memcpy(&data[writePoint],input,min(num,size-writePoint)*4);
+        if (size-writePoint<num){
+            memcpy(data,&input[size-writePoint],(num-(size-writePoint))*4);
+            writePoint=num-(size-writePoint);
+        }
+        else writePoint+=num;
+    }
+    float operator [] (int i) const {return data[writePoint>i?writePoint-i:size-(i-writePoint)];}
+    float& operator [] (int i) {return data[writePoint>i?writePoint-i:size-(i-writePoint)];}
+private:
+    size_t size;
+    float *data;
+    int writePoint;
+};
+
+class ofApp : public ofBaseApp{
+
+	public:
+		void setup();
+		void update();
+		void draw();
+
+		void keyPressed(int key);
+		void keyReleased(int key);
+		void mouseMoved(int x, int y );
+		void mouseDragged(int x, int y, int button);
+		void mousePressed(int x, int y, int button);
+		void mouseReleased(int x, int y, int button);
+		void windowResized(int w, int h);
+		void dragEvent(ofDragInfo dragInfo);
+		void gotMessage(ofMessage msg);
+        
+        void audioIn(float * input, int bufferSize, int nChannels);
+    
+        ofSoundStream soundStream;
+        int blockSize;
+        int sampleRate;
+
+        int frameHead; //last sample drawn
+
+        //baudvine::RingBuf<float, SAMPLERATE> buffer;
+
+        Buffer buffer;
+
+        float hScale;
+        float vScale;
+};
-- 
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