Add PulseAudio server and systemd service

This commit adds the PulseAudio server to the image, and a
related systemd service for automatic startup.

This change is motivated by an Audio Routing model
involving a PulseAudio plugin and a AudioManager interface,
as described on: https://wiki.automotivelinux.org/
eg-ui-graphics-req-audiorouting .

PulseAudio server is launched in user mode.
("paplay <file>.wav" may verify the functionality)

Change-Id: I12e2bfb2af5494e530e29bda77b0d88999cf7b4b
Signed-off-by: Manuel Bachmann <mbc@iot.bzh>

2 files changed, 30 insertions, 0 deletions

diff --git a/meta-ivi-common/recipes-core/packagegroups/packagegroup-ivi-common-core-multimedia.bb b/meta-ivi-common/recipes-core/packagegroups/packagegroup-ivi-common-core-multimedia.bb
index 40cd116dd..75e496290 100644
--- a/meta-ivi-common/recipes-core/packagegroups/packagegroup-ivi-common-core-multimedia.bb
+++ b/meta-ivi-common/recipes-core/packagegroups/packagegroup-ivi-common-core-multimedia.bb
@@ -14,6 +14,8 @@ ALLOW_EMPTY_${PN} = "1"
 RDEPENDS_${PN} += "\
     alsa-lib \
     alsa-utils \
+    pulseaudio-server \
+    pulseaudio-misc \
     agl-audio-plugin \
     gstreamer1.0-meta-base \
     "
diff --git a/meta-ivi-common/recipes-multimedia/pulseaudio/pulseaudio_%.bbappend b/meta-ivi-common/recipes-multimedia/pulseaudio/pulseaudio_%.bbappend
new file mode 100644
index 000000000..9964a8bd8
--- /dev/null
+++ b/meta-ivi-common/recipes-multimedia/pulseaudio/pulseaudio_%.bbappend
@@ -0,0 +1,28 @@
+FILESEXTRAPATHS_append := ":${THISDIR}/${PN}"
+
+inherit systemd
+
+do_install_append() {
+       # Install pulseaudio systemd service
+       if ${@bb.utils.contains('DISTRO_FEATURES', 'systemd', 'true', 'false', d)}; then
+              install -m 644 -p -D ${WORKDIR}/build/src/pulseaudio.service ${D}${systemd_user_unitdir}/pulseaudio.service
+              install -m 644 -p -D ${WORKDIR}/pulseaudio-6.0/src/daemon/systemd/user/pulseaudio.socket ${D}${systemd_user_unitdir}/pulseaudio.socket
+
+              # Execute these manually on behalf of systemctl script (from systemd-systemctl-native.bb)
+              # because it does not support systemd's user mode.
+              mkdir -p ${D}/home/root/.config/systemd/user/sockets.target.wants/
+              ln -sf ${systemd_user_unitdir}/pulseaudio.socket ${D}/home/root/.config/systemd/user/sockets.target.wants/pulseaudio.socket
+
+              mkdir -p ${D}/home/root/.config/systemd/user/default.target.wants/
+              ln -sf ${systemd_user_unitdir}/pulseaudio.service ${D}/home/root/.config/systemd/user/default.target.wants/pulseaudio.service
+       fi
+       mkdir -p ${D}/${bindir}
+       install -m 755 -p -D ${WORKDIR}/build/src/.libs/pacat ${D}/${bindir}/
+}
+
+FILES_${PN} += " \
+    ${@bb.utils.contains('DISTRO_FEATURES', 'systemd', '${systemd_user_unitdir}/pulseaudio.socket', '', d)} \
+    ${@bb.utils.contains('DISTRO_FEATURES', 'systemd', '/home/root/.config/systemd/user/sockets.target.wants/pulseaudio.socket', '', d)} \
+    ${@bb.utils.contains('DISTRO_FEATURES', 'systemd', '${systemd_user_unitdir}/pulseaudio.service', '', d)} \
+    ${@bb.utils.contains('DISTRO_FEATURES', 'systemd', '/home/root/.config/systemd/user/default.target.wants/pulseaudio.service', '', d)} \
+"