presets and banks saved correctly in audio plugin host. display seems to work also.

Source/BankAndPreset.cpp

@@ -0,0 +1,19 @@
+//
+// Created by Alex Birch on 13/04/2018.
+// Copyright (c) 2018 Birchlabs. All rights reserved.
+//
+
+#include "BankAndPreset.h"
+
+BankAndPreset::BankAndPreset(int bank, int preset)
+        : bank(bank),
+          preset(preset)
+{}
+
+int BankAndPreset::getBank() {
+    return bank;
+}
+
+int BankAndPreset::getPreset() {
+    return preset;
+}

Source/BankAndPreset.h

@@ -0,0 +1,23 @@
+//
+// Created by Alex Birch on 13/04/2018.
+// Copyright (c) 2018 Birchlabs. All rights reserved.
+//
+
+#pragma once
+
+#include "../JuceLibraryCode/JuceHeader.h"
+
+class BankAndPreset {
+public:
+    BankAndPreset(int bank, int preset);
+
+    int getBank();
+    int getPreset();
+
+private:
+    int bank;
+    int preset;
+
+    JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (BankAndPreset)
+};
+

Source/FilePicker.cpp

@@ -47,7 +47,7 @@ void FilePicker::paint(Graphics& g)
 
 void FilePicker::filenameComponentChanged (FilenameComponent*) {
     currentPath = fileChooser.getCurrentFile().getFullPathName();
-    fluidSynthModel->onFileNameChanged(fileChooser.getCurrentFile().getFullPathName());
+    fluidSynthModel->onFileNameChanged(fileChooser.getCurrentFile().getFullPathName(), -1, -1);
 }
 
 void FilePicker::setDisplayedFilePath(const String& path) {

Source/FluidSynthModel.cpp

@@ -41,11 +41,7 @@ void FluidSynthModel::initialise() {
 
     if (sharesParams.getSoundFontPath().isNotEmpty()) {
         loadFont(sharesParams.getSoundFontPath());
-        if (sharesParams.getPreset() == -1 || sharesParams.getBank() == -1) {
-            changePreset(sharesParams.getBank(), sharesParams.getPreset());
-        } else {
-            selectFirstPreset();
-        }
+        changePreset(sharesParams.getBank(), sharesParams.getPreset());
     }
 
     fluid_synth_set_gain(synth, 2.0);
@@ -67,7 +63,9 @@ int FluidSynthModel::getChannel() {
 
 void FluidSynthModel::changePreset(int bank, int preset) {
     if (bank == -1 || preset == -1) {
-        return;
+        unique_ptr<BankAndPreset> bankAndPreset = getFirstBankAndPreset();
+        bank = bankAndPreset->getBank();
+        preset = bankAndPreset->getPreset();
     }
     changePresetImpl(bank, preset);
     sharesParams.setPreset(preset);
@@ -91,6 +89,14 @@ const fluid_preset_t FluidSynthModel::getFirstPreset() {
     return preset;
 }
 
+unique_ptr<BankAndPreset> FluidSynthModel::getFirstBankAndPreset() {
+    fluid_preset_t preset = getFirstPreset();
+
+    int offset = fluid_synth_get_bank_offset(synth, sfont_id);
+
+    return make_unique<BankAndPreset>(preset.get_banknum(&preset) + offset, preset.get_num(&preset));
+};
+
 void FluidSynthModel::selectFirstPreset() {
     fluid_preset_t preset = getFirstPreset();
 
@@ -143,11 +149,12 @@ fluid_synth_t* FluidSynthModel::getSynth() {
     return synth;
 }
 
-void FluidSynthModel::onFileNameChanged(const String &absPath) {
+void FluidSynthModel::onFileNameChanged(const String &absPath, int bank, int preset) {
     if (!shouldLoadFont(absPath)) {
         return;
     }
     unloadAndLoadFont(absPath);
+    changePreset(bank, preset);
     sharesParams.setSoundFontPath(absPath);
     eventListeners.call(&FluidSynthModel::Listener::fontChanged, this, absPath);
 }
@@ -158,7 +165,6 @@ void FluidSynthModel::unloadAndLoadFont(const String &absPath) {
         fluid_synth_sfunload(synth, sfont_id, 1);
     }
     loadFont(absPath);
-    selectFirstPreset();
 }
 
 void FluidSynthModel::loadFont(const String &absPath) {

Source/FluidSynthModel.h

@@ -8,11 +8,14 @@
 #include "SharesParams.h"
 #include <fluidsynth.h>
 #include <memory>
+#include "BankAndPreset.h"
 #include "PresetsToBanks.h"
 
 
 // https://stackoverflow.com/a/13446565/5257399
-using std::shared_ptr;
+//using std::shared_ptr;
+
+using namespace std;
 
 class FluidSynthModel {
 public:
@@ -27,7 +30,7 @@ public:
     void changePreset(int bank, int preset);
     int getChannel();
 
-    void onFileNameChanged(const String &absPath);
+    void onFileNameChanged(const String &absPath, int bank, int preset);
 
     //==============================================================================
     /**
@@ -69,6 +72,7 @@ private:
 
     const fluid_preset_t getFirstPreset();
     void selectFirstPreset();
+    unique_ptr<BankAndPreset> getFirstBankAndPreset();
 
     void unloadAndLoadFont(const String &absPath);
     void loadFont(const String &absPath);

Source/PluginProcessor.cpp

@@ -243,8 +243,7 @@ void JuicySFAudioProcessor::setStateInformation (const void* data, int sizeInByt
                 if (auto* p = dynamic_cast<AudioProcessorParameterWithID*> (param))
                     p->setValue ((float) xmlState->getDoubleAttribute (p->paramID, p->getValue()));
 
-            fluidSynthModel.onFileNameChanged(soundFontPath);
-            fluidSynthModel.changePreset(lastBank, lastPreset);
+            fluidSynthModel.onFileNameChanged(soundFontPath, lastBank, lastPreset);
 
             AudioProcessorEditor* editor = getActiveEditor();
             if (editor != nullptr) {