From b45286c6e5261454832fe52c4f238450f48c7792 Mon Sep 17 00:00:00 2001
From: Stephen Birarda <commit@birarda.com>
Date: Mon, 11 Feb 2013 17:16:12 -0800
Subject: [PATCH] add copied AudioRingBuffer for mixer, comment crashing mouse
 calls

---
 interface/src/main.cpp        | 11 ++++----
 mixer/src/AudioRingBuffer.cpp | 51 +++++++++++++++++++++++++++++++++++
 mixer/src/AudioRingBuffer.h   | 31 +++++++++++++++++++++
 3 files changed, 87 insertions(+), 6 deletions(-)
 create mode 100644 mixer/src/AudioRingBuffer.cpp
 create mode 100644 mixer/src/AudioRingBuffer.h

diff --git a/interface/src/main.cpp b/interface/src/main.cpp
index 8a64b7e169..86b3b215bc 100644
--- a/interface/src/main.cpp
+++ b/interface/src/main.cpp
@@ -594,14 +594,13 @@ void display(void)
         glDisable(GL_DEPTH_TEST);
         glDisable(GL_LIGHTING);
 
-        //lattice.render(WIDTH, HEIGHT);
+        // lattice.render(WIDTH, HEIGHT);
+        // myFinger.render();
         Audio::render(WIDTH, HEIGHT);
 
         //drawvec3(100, 100, 0.15, 0, 1.0, 0, myHead.getPos(), 0, 1, 0);
         glPointParameterfvARB( GL_POINT_DISTANCE_ATTENUATION_ARB, pointer_attenuation_quadratic );
 
-//        myFinger.render();
-
         if (mouse_pressed == 1)
         {
             glPointSize( 10.0f );
@@ -853,7 +852,7 @@ void mouseFunc( int button, int state, int x, int y )
 		mouse_x = x;
 		mouse_y = y;
 		mouse_pressed = 1;
-//        lattice.mouseClick((float)x/(float)WIDTH,(float)y/(float)HEIGHT);
+        lattice.mouseClick((float)x/(float)WIDTH,(float)y/(float)HEIGHT);
     }
 	if( button == GLUT_LEFT_BUTTON && state == GLUT_UP )
     {
@@ -886,8 +885,8 @@ void mouseoverFunc( int x, int y)
 	mouse_y = y;
     if (mouse_pressed == 0)
     {
-        lattice.mouseOver((float)x/(float)WIDTH,(float)y/(float)HEIGHT);
-        myFinger.setTarget(mouse_x, mouse_y);
+//        lattice.mouseOver((float)x/(float)WIDTH,(float)y/(float)HEIGHT);
+//        myFinger.setTarget(mouse_x, mouse_y);
     }
 }
 
diff --git a/mixer/src/AudioRingBuffer.cpp b/mixer/src/AudioRingBuffer.cpp
new file mode 100644
index 0000000000..79d805969f
--- /dev/null
+++ b/mixer/src/AudioRingBuffer.cpp
@@ -0,0 +1,51 @@
+//
+//  AudioRingBuffer.cpp
+//  interface
+//
+//  Created by Stephen Birarda on 2/1/13.
+//  Copyright (c) 2013 HighFidelity, Inc. All rights reserved.
+//
+
+#include "AudioRingBuffer.h"
+
+AudioRingBuffer::AudioRingBuffer(short ringBufferSamples) {
+    ringBufferLengthSamples = ringBufferSamples;
+    
+    started = false;
+    transmitted = false;
+
+    endOfLastWrite = NULL;
+    
+    buffer = new int16_t[ringBufferLengthSamples];
+    nextOutput = buffer;
+};
+
+AudioRingBuffer::~AudioRingBuffer() {
+    delete[] buffer;
+};
+
+short AudioRingBuffer::diffLastWriteNextOutput()
+{
+    if (endOfLastWrite == NULL) {
+        return 0;
+    } else {
+        short sampleDifference = endOfLastWrite - nextOutput;
+        
+        if (sampleDifference < 0) {
+            sampleDifference += ringBufferLengthSamples;
+        }
+        
+        return sampleDifference;
+    }
+}
+
+short AudioRingBuffer::bufferOverlap(int16_t *pointer, short addedDistance)
+{
+    short samplesLeft = (buffer + ringBufferLengthSamples) - pointer;
+    
+    if (samplesLeft < addedDistance) {
+        return addedDistance - samplesLeft;
+    } else {
+        return 0;
+    }
+}
diff --git a/mixer/src/AudioRingBuffer.h b/mixer/src/AudioRingBuffer.h
new file mode 100644
index 0000000000..2454dbe916
--- /dev/null
+++ b/mixer/src/AudioRingBuffer.h
@@ -0,0 +1,31 @@
+//
+//  AudioRingBuffer.h
+//  interface
+//
+//  Created by Stephen Birarda on 2/1/13.
+//  Copyright (c) 2013 HighFidelity, Inc. All rights reserved.
+//
+
+#ifndef __interface__AudioRingBuffer__
+#define __interface__AudioRingBuffer__
+
+#include <iostream>
+#include <stdint.h>
+
+class AudioRingBuffer {
+    public:
+        int16_t *nextOutput;
+        int16_t *endOfLastWrite;
+        int16_t *buffer;
+        short ringBufferLengthSamples;
+        bool started;
+        bool transmitted;
+    
+        short diffLastWriteNextOutput();
+        short bufferOverlap(int16_t *pointer, short addedDistance);
+    
+        AudioRingBuffer(short ringBufferSamples);
+        ~AudioRingBuffer();
+};
+
+#endif /* defined(__interface__AudioRingBuffer__) */