comparison examples/samples/render.cpp @ 375:768acdeea362 prerelease

Merge

 /*
- * render.cpp
- *
- *  Created on: Oct 24, 2014
- *      Author: Andrew McPherson and Victor Zappi
+ ____  _____ _        _    
+| __ )| ____| |      / \   
+|  _ \|  _| | |     / _ \  
+| |_) | |___| |___ / ___ \ 
+|____/|_____|_____/_/   \_\.io
+
  */
 
+/*
+ *
+ * Andrew McPherson and Victor Zappi
+ * Queen Mary, University of London
+ */
+
+/**
+\example 4_audio_samples
+
+Playback WAV files
+------------------
+
+This sketch shows how to playback audio samples from a buffer.
+
+An audio file is loaded into a buffer `SampleData` as `gSampleData`. This is 
+accessed with a read pointer that is incremented at audio rate within the render 
+function: `out += gSampleData.samples[gReadPtr++]`.
+
+Note that the read pointer is stopped from incrementing past the length of the 
+`gSampleData`. This is achieved by comparing the read pointer value against the 
+sample length which we can access as follows: `gSampleData.sampleLen`.
+
+The sample is triggered by keyboard input: (a) starts sample playback, (s) 
+stops sample playback. The triggering is treated as a lower priority task than 
+the audio. You can see this at the bottom of the render function: 
+`Bela_scheduleAuxiliaryTask(gTriggerSamplesTask)`;
+*/
 
 #include <Bela.h>
 #include <cmath>
 #include "SampleData.h"