juce_audio_devices: Add support for JACK on Windows and macOS

modules/juce_audio_devices/audio_io/juce_AudioIODeviceType.cpp

@@ -100,7 +100,7 @@ void AudioIODeviceType::callDeviceChangeListeners()
  AudioIODeviceType* AudioIODeviceType::createAudioIODeviceType_ALSA()         { return nullptr; }
 #endif
 
-#if (JUCE_LINUX || JUCE_BSD) && JUCE_JACK
+#if (JUCE_LINUX || JUCE_BSD || JUCE_MAC || JUCE_WINDOWS) && JUCE_JACK
  AudioIODeviceType* AudioIODeviceType::createAudioIODeviceType_JACK()         { return new JackAudioIODeviceType(); }
 #else
  AudioIODeviceType* AudioIODeviceType::createAudioIODeviceType_JACK()         { return nullptr; }

modules/juce_audio_devices/juce_audio_devices.cpp

@@ -176,19 +176,6 @@
   #include "native/juce_ALSA_linux.cpp"
  #endif
 
- #if JUCE_JACK
-  /* Got an include error here? If so, you've either not got jack-audio-connection-kit
-     installed, or you've not got your paths set up correctly to find its header files.
-
-     The package you need to install to get JACK support is "libjack-dev".
-
-     If you don't have the jack-audio-connection-kit library and don't want to build
-     JUCE with low latency audio support, just set the JUCE_JACK flag to 0.
-  */
-  #include <jack/jack.h>
-  #include "native/juce_JackAudio_linux.cpp"
- #endif
-
  #if (JUCE_LINUX && JUCE_BELA)
   /* Got an include error here? If so, you've either not got the bela headers
      installed, or you've not got your paths set up correctly to find its header
@@ -258,6 +245,25 @@ namespace juce
 
 #endif
 
+#if (JUCE_LINUX || JUCE_BSD || JUCE_MAC || JUCE_WINDOWS) && JUCE_JACK
+ /* Got an include error here? If so, you've either not got jack-audio-connection-kit
+    installed, or you've not got your paths set up correctly to find its header files.
+
+    Linux: The package you need to install to get JACK support is libjack-dev.
+
+    macOS: The package you need to install to get JACK support is jack, which you can
+    install using Homebrew.
+
+    Windows: The package you need to install to get JACK support is available from the
+    JACK Audio website. Download and run the installer for Windows.
+
+    If you don't have the jack-audio-connection-kit library and don't want to build
+    JUCE with low latency audio support, just set the JUCE_JACK flag to 0.
+ */
+ #include <jack/jack.h>
+ #include "native/juce_JackAudio.cpp"
+#endif
+
 #include "midi_io/juce_MidiDevices.cpp"
 
 #if ! JUCE_SYSTEMAUDIOVOL_IMPLEMENTED

modules/juce_audio_devices/juce_audio_devices.h

@@ -121,7 +121,7 @@
 #endif
 
 /** Config: JUCE_JACK
-    Enables JACK audio devices (Linux only).
+    Enables JACK audio devices.
 */
 #ifndef JUCE_JACK
  #define JUCE_JACK 0

modules/juce_audio_devices/native/juce_JackAudio.cpp

@@ -42,7 +42,11 @@ static void* juce_loadJackFunction (const char* const name)
     if (juce_libjackHandle == nullptr)
         return nullptr;
 
+   #if JUCE_WINDOWS
+    return GetProcAddress ((HMODULE) juce_libjackHandle, name);
+   #else
     return dlsym (juce_libjackHandle, name);
+   #endif
 }
 
 #define JUCE_DECL_JACK_FUNCTION(return_type, fn_name, argument_types, arguments)  \
@@ -604,8 +608,19 @@ public:
         inputNames.clear();
         outputNames.clear();
 
+       #if (JUCE_LINUX || JUCE_BSD)
         if (juce_libjackHandle == nullptr)  juce_libjackHandle = dlopen ("libjack.so.0", RTLD_LAZY);
         if (juce_libjackHandle == nullptr)  juce_libjackHandle = dlopen ("libjack.so",   RTLD_LAZY);
+       #elif JUCE_MAC
+        if (juce_libjackHandle == nullptr)  juce_libjackHandle = dlopen ("libjack.dylib", RTLD_LAZY);
+       #elif JUCE_WINDOWS
+        #if JUCE_64BIT
+         if (juce_libjackHandle == nullptr)  juce_libjackHandle = LoadLibraryA ("libjack64.dll");
+        #else
+         if (juce_libjackHandle == nullptr)  juce_libjackHandle = LoadLibraryA ("libjack.dll");
+        #endif
+       #endif
+
         if (juce_libjackHandle == nullptr)  return;
 
         jack_status_t status = {};