Add sound multiplexer auto-detection when building

.github/workflows/main.yml

@@ -8,8 +8,9 @@ jobs:
     strategy:
       matrix:
         dependency:
-          - libpulse-dev
           - none
+          - libpulse-dev
+          - libjack-jackd2-dev
     steps:
     - name: checkout code
       uses: actions/checkout@v4
@@ -19,7 +20,9 @@ jobs:
             sudo apt-get install libasound2-dev libudev-dev
     - name: install sound multiplexer ${{ matrix.dependency }}
       if: matrix.dependency != 'none'
-      run: sudo apt-get install ${{ matrix.dependency }}
+      run: |
+            sudo apt-get update
+            sudo apt-get install ${{ matrix.dependency }}
     - name: default build
       run: make
       shell: bash

Makefile

@@ -77,33 +77,50 @@ $(call set-feature, VIRTIOSND)
 ifeq ($(call has, VIRTIOSND), 1)
     OBJS_EXTRA += virtio-snd.o
 
-    PORTAUDIOLIB := portaudio/lib/.libs/libportaudio.a
-    LDFLAGS += $(PORTAUDIOLIB)
+    PA_LIB := portaudio/lib/.libs/libportaudio.a
+    PA_CFLAGS := -Iportaudio/include
+    PA_CONFIG_PARAMS :=
+    LDFLAGS += $(PA_LIB)
+    CFLAGS += $(PA_CFLAGS)
 
     ifeq ($(UNAME_S),Linux)
         LDFLAGS += -lasound -lrt
+        PA_CONFIG_PARAMS += --with-alsa
         # Check PulseAudio installation
         ifeq (0, $(call check-pa))
             LDFLAGS += -lpulse
+            PA_CONFIG_PARAMS += --with-pulseaudio
+        endif
+        ifeq (0, $(call check-jack2))
+            LDFLAGS += -ljack
+            PA_CONFIG_PARAMS += --with-jack
         endif
     endif
     ifeq ($(UNAME_S),Darwin)
         LDFLAGS += -framework CoreServices -framework CoreFoundation -framework AudioUnit -framework AudioToolbox -framework CoreAudio
     endif
 
-    CFLAGS += -Iportaudio/include
     # PortAudio requires libm, yet we set -lm in the end of LDFLAGS
     # so that the other libraries will be benefited for no need to set
     # -lm separately.
     LDFLAGS += -lpthread
 
 portaudio/Makefile:
 	git submodule update --init portaudio
-$(PORTAUDIOLIB): portaudio/Makefile
-	cd $(dir $<) && LDFLAGS="" ./configure --without-sndio
+$(PA_LIB): portaudio/Makefile
+	cd $(dir $<) && git clean -fdx && git reset --hard HEAD
+	cd $(dir $<) && ./configure \
+        --enable-static \
+        --disable-shared \
+        --without-samples \
+        --without-tests \
+        --without-oss \
+        --without-sndio \
+        --disable-dependency-tracking \
+        $(PA_CONFIG_PARAMS)
 	$(MAKE) -C $(dir $<)
-main.o: $(PORTAUDIOLIB)
-
+main.o: $(PA_LIB)
+virtio-snd.o: $(PA_LIB)
 # suppress warning when compiling PortAudio
 virtio-snd.o: CFLAGS += -Wno-unused-parameter
 endif

mk/check-libs.mk

@@ -24,14 +24,27 @@ endef
 define create-ca-prog
 echo '\
 #include <CoreAudio/CoreAudio.h>\n\
-#include <AudioToolbox/AudioQueue.h>
+#include <AudioToolbox/AudioQueue.h>\n\
 int main(){\n\
     AudioQueueRef queue;\n\
     AudioQueueDispose(queue, TRUE);\n\
     return 0;\n\
 }\n'
 endef
 
+# Create a mininal jack2 program
+define create-jack2-prog
+echo '\
+#include <stdlib.h>\n\
+#include <jack/jack.h>\n\
+int main(){\n\
+	jack_default_audio_sample_t *signal;\n\
+	signal = (jack_default_audio_sample_t *)malloc(1024 * sizeof(jack_default_audio_sample_t));\n\
+	free(signal);\n\
+	return 0;\n\
+}\n'
+endef
+
 # Check ALSA installation
 define check-alsa
 $(shell $(call create-alsa-prog) | $(CC) -x c - -lasound -o /dev/null > /dev/null 2> /dev/null 
@@ -40,11 +53,17 @@ endef
 
 # Check PulseAudio installation
 define check-pa
-$(shell $(call create-pa-prog) | $(CC) -x c - -lpulse -o /dev/null && echo 0 || echo 1)
+$(shell $(call create-pa-prog) | $(CC) -x c - -lpulse -o /dev/null > /dev/null 2> /dev/null && echo 0 || echo 1)
 endef
 
 # Check CoreAudio installation
 define check-coreaudio
 $(shell $(call create-ca-prog) | $(CC) -x c - -framework AudioToolbox -o /dev/null > /dev/null 2> /dev/null 
 	&& echo 0 || echo 1)
 endef
+
+# Check JACK (formally jack2) installation
+define check-jack2
+$(shell $(call create-jack2-prog) | $(CC) -x c - -ljack  -o /dev/null > /dev/null 2> /dev/null 
+	&& echo 0 || echo 1)
+endef