From 5958a59630b7126a00f35035888ce50a377f9bf9 Mon Sep 17 00:00:00 2001
From: towsey <m.towsey@qut.edu.au>
Date: Thu, 24 Sep 2020 11:21:59 +1000
Subject: [PATCH] Enable Oscillation recognizer to utilize an array of decibel
 thresholds

Issue #370 Part of ongoing refactoring to allow all recognizers to work with an array of decibel thresholds.
---
 .../Recognizers/GenericRecognizer.cs          | 27 +++---------
 .../Ocillations/Oscillations2012.cs           | 43 +++++++++++++++++++
 2 files changed, 50 insertions(+), 20 deletions(-)

diff --git a/src/AnalysisPrograms/Recognizers/GenericRecognizer.cs b/src/AnalysisPrograms/Recognizers/GenericRecognizer.cs
index a453a14d2..d38824754 100644
--- a/src/AnalysisPrograms/Recognizers/GenericRecognizer.cs
+++ b/src/AnalysisPrograms/Recognizers/GenericRecognizer.cs
@@ -255,27 +255,14 @@ public override RecognizerResults Recognize(
                         }
                         else if (profileConfig is OscillationParameters op)
                         {
-                            Oscillations2012.Execute(
+                            List<Plot> decibelPlots;
+                            (spectralEvents, decibelPlots) = Oscillations2012.GetComponentsWithOscillations(
                                 spectrogram,
-                                op.MinHertz.Value,
-                                op.MaxHertz.Value,
-                                op.DctDuration,
-                                op.MinOscillationFrequency,
-                                op.MaxOscillationFrequency,
-                                op.DctThreshold,
-                                op.EventThreshold,
-                                op.MinDuration.Value,
-                                op.MaxDuration.Value,
-                                out var scores,
-                                out var oscillationEvents,
-                                out var hits,
-                                segmentStartOffset);
-
-                            spectralEvents = new List<EventCommon>(oscillationEvents);
-
-                            //plots.Add(new Plot($"{profileName} (:OscillationScore)", scores, op.EventThreshold));
-                            var plot = Plot.PreparePlot(scores, $"{profileName} (:OscillationScore)", op.EventThreshold);
-                            plots.Add(plot);
+                                op,
+                                segmentStartOffset,
+                                profileName);
+
+                            plots.AddRange(decibelPlots);
                         }
                         else
                         {
diff --git a/src/AudioAnalysisTools/Ocillations/Oscillations2012.cs b/src/AudioAnalysisTools/Ocillations/Oscillations2012.cs
index 3a126ef0d..3ed499d02 100644
--- a/src/AudioAnalysisTools/Ocillations/Oscillations2012.cs
+++ b/src/AudioAnalysisTools/Ocillations/Oscillations2012.cs
@@ -6,6 +6,8 @@ namespace AudioAnalysisTools
 {
     using System;
     using System.Collections.Generic;
+    using System.Reflection.Metadata.Ecma335;
+    using AnalysisPrograms.Recognizers.Base;
     using AudioAnalysisTools.DSP;
     using AudioAnalysisTools.Events;
     using AudioAnalysisTools.StandardSpectrograms;
@@ -21,6 +23,47 @@ namespace AudioAnalysisTools
     /// </summary>
     public static class Oscillations2012
     {
+        public static (List<EventCommon> SpectralEvents, List<Plot> DecibelPlots) GetComponentsWithOscillations(
+            SpectrogramStandard spectrogram,
+            OscillationParameters op,
+            TimeSpan segmentStartOffset,
+            string profileName)
+        {
+            // get the array of decibel thresholds
+            var thresholdArray = op.DecibelThresholds;
+
+            var spectralEvents = new List<EventCommon>();
+            var plots = new List<Plot>();
+
+            // loop through the array of decibel thresholds
+            foreach (var threshold in thresholdArray)
+            {
+                Oscillations2012.Execute(
+                    spectrogram,
+                    op.MinHertz.Value,
+                    op.MaxHertz.Value,
+                    op.DctDuration,
+                    op.MinOscillationFrequency,
+                    op.MaxOscillationFrequency,
+                    op.DctThreshold,
+                    op.EventThreshold,
+                    op.MinDuration.Value,
+                    op.MaxDuration.Value,
+                    out var scores,
+                    out var oscillationEvents,
+                    out var hits,
+                    segmentStartOffset);
+
+                spectralEvents.AddRange(oscillationEvents);
+
+                // prepare plot of resultant Harmonics decibel array.
+                var plot = Plot.PreparePlot(scores, $"{profileName} (Oscillations:{threshold:d0}db)", threshold.Value);
+                plots.Add(plot);
+            }
+
+            return (spectralEvents, plots);
+        }
+
         public static void Execute(
             SpectrogramStandard sonogram,
             int minHz,