audio: Add Pipewire playback/capture sink

CMakeLists.txt

@@ -360,6 +360,8 @@ set_option(JACK                "Support the JACK audio API" ${UNIX_SYS})
 dep_option(JACK_SHARED         "Dynamically load JACK audio support" ON "JACK" OFF)
 set_option(ESD                 "Support the Enlightened Sound Daemon" ${UNIX_SYS})
 dep_option(ESD_SHARED          "Dynamically load ESD audio support" ON "ESD" OFF)
+set_option(PIPEWIRE            "Use Pipewire" ${UNIX_SYS})
+dep_option(PIPEWIRE_SHARED     "Dynamically load Pipewire support" ON "PIPEWIRE" OFF)
 set_option(PULSEAUDIO          "Use PulseAudio" ${UNIX_SYS})
 dep_option(PULSEAUDIO_SHARED   "Dynamically load PulseAudio support" ON "PULSEAUDIO" OFF)
 set_option(ARTS                "Support the Analog Real Time Synthesizer" ${UNIX_SYS})
@@ -1165,6 +1167,7 @@ elseif(UNIX AND NOT APPLE AND NOT ANDROID AND NOT RISCOS)
     CheckOSS()
     CheckALSA()
     CheckJACK()
+    CheckPipewire()
     CheckPulseAudio()
     CheckESD()
     CheckARTS()