From 1efa5cee1b563976c614edbc60db8fbccfa5cf4b Mon Sep 17 00:00:00 2001
From: Yuuki Nishiyama <tetujin@ht.sfc.keio.ac.jp>
Date: Thu, 13 Jun 2019 08:26:23 +0300
Subject: [PATCH] Add AWAREAmbientNoiseFFTDelegate into AmbientNoise plugin

---
 AWAREFramework.podspec                        |  2 +-
 .../Plugins/AmbientNoise/AmbientNoise.h       | 29 ++++++++++++++++++-
 .../Plugins/AmbientNoise/AmbientNoise.m       | 11 ++++++-
 .../AWARE-AmbientNoise/ViewController.swift   | 18 ++++++++----
 4 files changed, 52 insertions(+), 8 deletions(-)

diff --git a/AWAREFramework.podspec b/AWAREFramework.podspec
index b115c25..7cd4d41 100644
--- a/AWAREFramework.podspec
+++ b/AWAREFramework.podspec
@@ -8,7 +8,7 @@
 
 Pod::Spec.new do |s|
   s.name             = 'AWAREFramework'
-  s.version          = '1.4.14'
+  s.version          = '1.4.15'
   s.summary          = 'AWARE: An Open-source Context Instrumentation Framework'
 
 # This description is used to generate tags and improve search results.
diff --git a/AWAREFramework/Classes/Plugins/AmbientNoise/AmbientNoise.h b/AWAREFramework/Classes/Plugins/AmbientNoise/AmbientNoise.h
index ec5665b..80d7e88 100755
--- a/AWAREFramework/Classes/Plugins/AmbientNoise/AmbientNoise.h
+++ b/AWAREFramework/Classes/Plugins/AmbientNoise/AmbientNoise.h
@@ -33,6 +33,31 @@ extern NSString * const AWARE_PREFERENCES_PLUGIN_AMBIENT_NOISE_SAMPLE_SIZE;
 /** Silence threshold (default = 50) in dB */
 extern NSString * const AWARE_PREFERENCES_PLUGIN_AMBIENT_NOISE_SILENCE_THRESHOLD;
 
+/**
+ The EZAudioFFTDelegate provides event callbacks for the EZAudioFFT (and subclasses such as the EZAudioFFTRolling) whenvever the FFT is computed.
+ */
+@protocol AWAREAmbientNoiseFFTDelegate <NSObject>
+
+@optional
+
+///-----------------------------------------------------------
+/// @name Getting FFT Output Data
+///-----------------------------------------------------------
+
+/**
+ Triggered when the EZAudioFFT computes an FFT from a buffer of input data. Provides an array of float data representing the computed FFT.
+ @param fft        The EZAudioFFT instance that triggered the event.
+ @param fftData    A float pointer representing the float array of FFT data.
+ @param bufferSize A vDSP_Length (unsigned long) representing the length of the float array.
+ */
+- (void)        fft:(EZAudioFFT *)fft
+ updatedWithFFTData:(float *)fftData
+         bufferSize:(vDSP_Length)bufferSize;
+
+@end
+
+
+
 @interface AmbientNoise : AWARESensor <AWARESensorDelegate, EZMicrophoneDelegate, EZRecorderDelegate, EZAudioFFTDelegate, CXCallObserverDelegate>
 //
 // The microphone component
@@ -54,6 +79,8 @@ extern NSString * const AWARE_PREFERENCES_PLUGIN_AMBIENT_NOISE_SILENCE_THRESHOLD
 //
 @property (nonatomic, assign, readonly) BOOL isRecording;
 
+@property (nonatomic, weak) id<AWAREAmbientNoiseFFTDelegate> fftDelegate;
+
 @property int frequencyMin;
 @property int sampleSize;
 @property double sampleDuration;
@@ -64,7 +91,7 @@ extern NSString * const AWARE_PREFERENCES_PLUGIN_AMBIENT_NOISE_SILENCE_THRESHOLD
 
 - (BOOL) startSensor;
 
-typedef void (^AudioFileGenerationHandler)(NSURL * fileURL);
+typedef void (^AudioFileGenerationHandler)(NSURL * _Nullable fileURL);
 
 - (void) setAudioFileGenerationHandler:(AudioFileGenerationHandler __nullable)handler;
 
diff --git a/AWAREFramework/Classes/Plugins/AmbientNoise/AmbientNoise.m b/AWAREFramework/Classes/Plugins/AmbientNoise/AmbientNoise.m
index ae05229..a882551 100755
--- a/AWAREFramework/Classes/Plugins/AmbientNoise/AmbientNoise.m
+++ b/AWAREFramework/Classes/Plugins/AmbientNoise/AmbientNoise.m
@@ -621,7 +621,16 @@ - (void)        fft:(EZAudioFFT *)fft
          bufferSize:(vDSP_Length)bufferSize
 {
     maxFrequency = [fft maxFrequency];
-    //    NSLog(@"%f", maxFrequency);
+    
+    if ([self.fftDelegate respondsToSelector:@selector(fft:updatedWithFFTData:bufferSize:)]) {
+        [self.fftDelegate fft:fft updatedWithFFTData:fftData bufferSize:bufferSize];
+    }
+    
+//    for (int i = 0; i<bufferSize; i++) {
+//        if (fftData[i] > 0.01) {
+//            NSLog(@"fft val [%d] %f", i, fftData[i]);
+//        }
+//    }
     //    [self setLatestValue:[NSString stringWithFormat:@"dB:%f, RMS:%f, Frequency:%f", db, rms, maxFrequency]];
 }
 
diff --git a/Example/AWARE-AmbientNoise/ViewController.swift b/Example/AWARE-AmbientNoise/ViewController.swift
index fda847b..3365122 100644
--- a/Example/AWARE-AmbientNoise/ViewController.swift
+++ b/Example/AWARE-AmbientNoise/ViewController.swift
@@ -38,16 +38,12 @@ class ViewController: UIViewController {
         noise.sampleDuration = 10
         noise.sampleSize     = 60
         noise.startSensor()
-//        noise.setSensorEventHandler { (sensor, data) in
-//            if let d = data {
-//                print(d)
-//            }
-//        }
         noise.setAudioFileGenerationHandler { (url) in
             if let url = url {
                 self.recognizeFile(url: url)
             }
         }
+        noise.fftDelegate = self
     }
 
     func recognizeFile(url:URL) {
@@ -77,3 +73,15 @@ class ViewController: UIViewController {
 
 }
 
+extension ViewController: AWAREAmbientNoiseFFTDelegate {
+    func fft(_ fft: EZAudioFFT!, updatedWithFFTData fftData: UnsafeMutablePointer<Float>!, bufferSize: vDSP_Length) {
+        if let data = fftData {
+            for i in 0..<Int(bufferSize){
+                if data[i] > 0.01 {
+                    print(i,data[i])
+                }
+            }
+        }
+    }
+}
+