fix: complete PipeWire dynamic loading and channel mapping

docs/Linux Dependencies.md

@@ -24,6 +24,7 @@ or
 #### juce_audio_devices
 - libasound2-dev
 - libjack-jackd2-dev (unless `JUCE_JACK=0`)
+- libpipewire-0.3-dev (unless `JUCE_PIPEWIRE=0`)
 
 #### juce_audio_processors
 - ladspa-sdk (unless `JUCE_PLUGINHOST_LADSPA=0`)
@@ -66,7 +67,7 @@ available during runtime.
 The full command is as follows:
 
     sudo apt update
-    sudo apt install libasound2-dev libjack-jackd2-dev \
+    sudo apt install libasound2-dev libjack-jackd2-dev libpipewire-0.3-dev \
         ladspa-sdk \
         libcurl4-openssl-dev  \
         libfreetype-dev libfontconfig1-dev \

modules/juce_audio_devices/audio_io/juce_AudioDeviceManager.cpp

@@ -334,6 +334,7 @@ void AudioDeviceManager::createAudioDeviceTypes (OwnedArray<AudioIODeviceType>&
     addIfNotNull (list, AudioIODeviceType::createAudioIODeviceType_iOSAudio());
     addIfNotNull (list, AudioIODeviceType::createAudioIODeviceType_ALSA());
     addIfNotNull (list, AudioIODeviceType::createAudioIODeviceType_JACK());
+    addIfNotNull (list, AudioIODeviceType::createAudioIODeviceType_PipeWire());
     addIfNotNull (list, AudioIODeviceType::createAudioIODeviceType_Oboe());
     addIfNotNull (list, AudioIODeviceType::createAudioIODeviceType_OpenSLES());
     addIfNotNull (list, AudioIODeviceType::createAudioIODeviceType_Android());

modules/juce_audio_devices/audio_io/juce_AudioIODeviceType.cpp

@@ -106,6 +106,12 @@ void AudioIODeviceType::callDeviceChangeListeners()
  AudioIODeviceType* AudioIODeviceType::createAudioIODeviceType_JACK()         { return nullptr; }
 #endif
 
+#if (JUCE_LINUX || JUCE_BSD) && JUCE_PIPEWIRE
+ AudioIODeviceType* AudioIODeviceType::createAudioIODeviceType_PipeWire()     { return createAudioIODeviceType_PipeWire_Native(); }
+#else
+ AudioIODeviceType* AudioIODeviceType::createAudioIODeviceType_PipeWire()     { return nullptr; }
+#endif
+
 #if JUCE_ANDROID
  AudioIODeviceType* AudioIODeviceType::createAudioIODeviceType_Android()
  {

modules/juce_audio_devices/audio_io/juce_AudioIODeviceType.h

@@ -170,6 +170,8 @@ class JUCE_API  AudioIODeviceType
     static AudioIODeviceType* createAudioIODeviceType_ALSA();
     /** Creates a JACK device type if it's available on this platform, or returns null. */
     static AudioIODeviceType* createAudioIODeviceType_JACK();
+    /** Creates a PipeWire device type if it's available on this platform, or returns null. */
+    static AudioIODeviceType* createAudioIODeviceType_PipeWire();
     /** Creates an Android device type if it's available on this platform, or returns null. */
     static AudioIODeviceType* createAudioIODeviceType_Android();
     /** Creates an Android OpenSLES device type if it's available on this platform, or returns null. */

modules/juce_audio_devices/juce_audio_devices.cpp

@@ -165,6 +165,34 @@
  #endif
  #undef SIZEOF
 
+ #if JUCE_PIPEWIRE
+  /* Got an include error here? If so, you've either not got PipeWire installed,
+     or you've not got your paths set up correctly to find its header files.
+
+     The package you need to install to get PipeWire support is
+     "libpipewire-0.3-dev".
+
+     If you don't have PipeWire installed and don't want to build JUCE with
+     PipeWire support, just set the JUCE_PIPEWIRE flag to 0.
+  */
+  JUCE_BEGIN_IGNORE_WARNINGS_GCC_LIKE ("-Wzero-length-array",
+                                       "-Wold-style-cast",
+                                       "-Wredundant-decls",
+                                       "-Wmissing-field-initializers",
+                                       "-Wunused-parameter",
+                                       "-Wsign-conversion",
+                                       "-Wcast-align",
+                                       "-Wshadow",
+                                       "-Wshadow-field")
+  #include <pipewire/pipewire.h>
+  #include <pipewire/extensions/metadata.h>
+  #include <spa/param/audio/format-utils.h>
+  #include <spa/param/audio/raw.h>
+  #include <spa/param/audio/raw-types.h>
+  JUCE_END_IGNORE_WARNINGS_GCC_LIKE
+  #include "native/juce_PipeWire_linux.cpp"
+ #endif
+
 //==============================================================================
 #elif JUCE_ANDROID
 

modules/juce_audio_devices/juce_audio_devices.h

@@ -176,6 +176,21 @@
  #define JUCE_JACK 0
 #endif
 
+/** Config: JUCE_PIPEWIRE
+    Enables native PipeWire audio devices (Linux only).
+
+    This uses libpipewire-0.3, which is loaded dynamically at runtime, so no
+    extra library needs to be linked against your app. You will still need to
+    have the PipeWire development headers installed in order to compile with
+    this flag enabled. The package you need to install is "libpipewire-0.3-dev".
+
+    If you don't have PipeWire installed, or don't want to use it, just set the
+    JUCE_PIPEWIRE flag to 0.
+*/
+#ifndef JUCE_PIPEWIRE
+ #define JUCE_PIPEWIRE 0
+#endif
+
 /** Config: JUCE_USE_ANDROID_OBOE
     Enables Oboe devices (Android only).
 */