Ask the user for microphone access on startup if required

CMakeLists.txt

@@ -332,7 +332,7 @@ if (APPLE)
     ${CMAKE_SOURCE_DIR}/src/platform_glfw/Renderer.cpp
     ${CMAKE_SOURCE_DIR}/src/platform_common/FFT.cpp
     ${CMAKE_SOURCE_DIR}/src/platform_x11/MIDI.cpp
-    ${CMAKE_SOURCE_DIR}/src/platform_osx/Misc.cpp
+    ${CMAKE_SOURCE_DIR}/src/platform_osx/Misc.mm
     ${CMAKE_SOURCE_DIR}/src/platform_x11/Timer.cpp
     ${CMAKE_SOURCE_DIR}/src/platform_osx/SetupDialog.cpp
     ${CMAKE_SOURCE_DIR}/src/platform_osx/Clipboard.cpp
@@ -423,11 +423,11 @@ if (APPLE)
   set(MACOSX_BUNDLE_BUNDLE_NAME ${BZC_EXE_NAME})
   set(MACOSX_BUNDLE_GUI_IDENTIFIER "${BZC_EXE_NAME}")
   set(MACOSX_BUNDLE_ICON_FILE icon.icns)
-  set(MACOSX_BUNDLE_INFO_STRING "${VERSION_MAJOR}.${VERSION_MINOR}.${VERSION_PATCH},Copyright © 2018 The Bonzomatic Contributors")
+  set(MACOSX_BUNDLE_INFO_STRING "${VERSION_MAJOR}.${VERSION_MINOR}.${VERSION_PATCH},Copyright © 2019 The Bonzomatic Contributors")
   set(MACOSX_BUNDLE_SHORT_VERSION_STRING "${VERSION_MAJOR}.${VERSION_MINOR}.${VERSION_PATCH}")
   set(MACOSX_BUNDLE_LONG_VERSION_STRING "${VERSION_MAJOR}.${VERSION_MINOR}.${VERSION_PATCH}")
   set(MACOSX_BUNDLE_BUNDLE_VERSION "${VERSION_MAJOR}.${VERSION_MINOR}.${VERSION_PATCH}")
-  set(MACOSX_BUNDLE_COPYRIGHT "Copyright © 2014-2018 The Bonzomatic Contributors. All rights reserved.")
+  set(MACOSX_BUNDLE_COPYRIGHT "Copyright © 2014-2019 The Bonzomatic Contributors. All rights reserved.")
 
   set_source_files_properties(${BZC_RESOURCES_DATA} PROPERTIES MACOSX_PACKAGE_LOCATION Resources)
 
@@ -440,8 +440,9 @@ if (APPLE)
   find_library(OPENGL_FRAMEWORK OpenGL)
   find_library(CARBON_FRAMEWORK Carbon)
   find_library(COREAUDIO_FRAMEWORK CoreAudio)
-  mark_as_advanced(COCOA_FRAMEWORK OPENGL_FRAMEWORK CARBON_FRAMEWORK COREAUDIO_FRAMEWORK)
-  set(PLATFORM_LIBS ${COCOA_FRAMEWORK} ${OPENGL_FRAMEWORK} ${CARBON_FRAMEWORK} ${COREAUDIO_FRAMEWORK})
+  find_library(AVFOUNDATION_FRAMEWORK AVFoundation)
+  mark_as_advanced(COCOA_FRAMEWORK OPENGL_FRAMEWORK CARBON_FRAMEWORK COREAUDIO_FRAMEWORK AVFOUNDATION_FRAMEWORK)
+  set(PLATFORM_LIBS ${COCOA_FRAMEWORK} ${OPENGL_FRAMEWORK} ${CARBON_FRAMEWORK} ${COREAUDIO_FRAMEWORK} ${AVFOUNDATION_FRAMEWORK})
 elseif (UNIX)
   set(PLATFORM_LIBS GL)
 elseif (WIN32)

data/macosx/MacOSXBundleInfo.plist.in

@@ -40,5 +40,7 @@
 	<true/>
 	<key>LSMinimumSystemVersion</key>
 	<string>10.6.4</string>
+	<key>NSMicrophoneUsageDescription</key>
+	<string>Bonzomatic requires microphone access for the FFT textures to work.</string>
 </dict>
 </plist>
\ No newline at end of file

src/platform_osx/Misc.cpp → src/platform_osx/Misc.mm

@@ -7,7 +7,54 @@
 #include <unistd.h>
 
 #include <sys/param.h> // For MAXPATHLEN
-#include "CoreFoundation/CoreFoundation.h"
+#import <Foundation/Foundation.h>
+#import <AVFoundation/AVFoundation.h>
+
+@interface MiscCocoa : NSObject
+
+@end
+
+@implementation MiscCocoa
+
++ (void)requestMicrophoneAccess {
+  switch ([AVCaptureDevice authorizationStatusForMediaType:AVMediaTypeAudio])
+  {
+    case AVAuthorizationStatusAuthorized:
+    {
+      fprintf(stdout, "Microphone access already granted\n");
+      break;
+    }
+    case AVAuthorizationStatusNotDetermined:
+    {
+      [AVCaptureDevice requestAccessForMediaType:AVMediaTypeAudio completionHandler:^(BOOL granted) {
+        if (granted) {
+            fprintf(stdout, "Microphone access granted\n");
+        } else {
+            fprintf(stderr, "Microphone access denied. No FFT support.\n");
+        }
+      }];
+      return;
+    }
+    case AVAuthorizationStatusDenied:
+    {
+      fprintf(stderr, "Microphone access previously denied by user. Asking again.\n");
+      [AVCaptureDevice requestAccessForMediaType:AVMediaTypeAudio completionHandler:^(BOOL granted) {
+        if (granted) {
+          fprintf(stdout, "Microphone access granted\n");
+        } else {
+          fprintf(stderr, "Microphone access denied. No FFT support.\n");
+        }
+      }];
+      return;
+    }
+    case AVAuthorizationStatusRestricted:
+    {
+      fprintf(stderr, "The user can't grant microphone access due to restrictions.\n");
+    }
+  }
+}
+
+@end
 
 void Misc::PlatformStartup()
 {
@@ -27,6 +74,11 @@ void Misc::PlatformStartup()
   CFRelease(pathURL);
 
   chdir(appPath);
+  
+  // Check if the user has granted microphone access to Bonzomatic. Else request it.
+  if (@available(macOS 10.14, *)) {
+    [MiscCocoa requestMicrophoneAccess];
+  }
 }
 
 void Misc::PlatformShutdown()