[PATCH 2/3] qemu: Generate cmd line for pipewire audio backend

This is mostly straightforward, except for a teensy-weensy detail: usually, there's no system wide daemon running, no system wide available socket that anybody could connect to. PipeWire uses a per user daemon approach instead. But this in turn means, that the socket location floats between various locations and is derived from various environment variables (just like the actual socket name) and thus we must pass the variables to QEMU. Resolves: https://gitlab.com/libvirt/libvirt/-/issues/560 Signed-off-by: Michal Privoznik <mprivozn(a)redhat.com&gt; --- src/qemu/qemu_command.c | 61 +++++++++++++++++++ .../audio-many-backends.x86_64-latest.args | 2 + .../qemuxml2argvdata/audio-many-backends.xml | 1 + .../audio-pipewire-best.x86_64-latest.args | 36 +++++++++++ .../audio-pipewire-full.x86_64-latest.args | 36 +++++++++++ .../audio-pipewire-minimal.x86_64-latest.args | 36 +++++++++++ tests/qemuxml2argvtest.c | 14 +++++ .../audio-many-backends.x86_64-latest.xml | 1 + 8 files changed, 187 insertions(+) create mode 100644 tests/qemuxml2argvdata/audio-pipewire-best.x86_64-latest.args create mode 100644 tests/qemuxml2argvdata/audio-pipewire-full.x86_64-latest.args create mode 100644 tests/qemuxml2argvdata/audio-pipewire-minimal.x86_64-latest.args diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c index 173639277c..a7bb999528 100644 --- a/src/qemu/qemu_command.c +++ b/src/qemu/qemu_command.c @@ -7833,6 +7833,60 @@ qemuBuildAudioSDLProps(virDomainAudioIOSDL *def, } +static int +qemuBuildAudioPipewireAudioProps(virDomainAudioIOPipewireAudio *def, + virJSONValue **props) +{ + return virJSONValueObjectAdd(props, + "S:name", def->name, + "S:stream-name", def->streamName, + "p:latency", def->latency, + NULL); +} + + +static void +qemuBuildAudioPipewireAudioEnv(virCommand *cmd) +{ + const char *envVars[] = { "PIPEWIRE_RUNTIME_DIR", "XDG_RUNTIME_DIR", + "USERPROFILE" }; + size_t i; + + /* PipeWire needs access to its daemon socket. The socket name is + * configurable (core.name in pipewire.conf, or PIPEWIRE_CORE and + * PIPEWIRE_REMOTE env vars). If the socket name is not an absolute + * path, then the socket is looked for in the following directories + * (in order): + * + * - PIPEWIRE_RUNTIME_DIR + * - XDG_RUNTIME_DIR + * - USERPROFILE + * + * This order is defined in get_runtime_dir() from + * src/modules/module-protocol-native/local-socket.c from PipeWire's + * codebase. + * + * Now, PIPEWIRE_CORE and/or PIPEWIRE_REMOTE should be passed + * whenever present in the environment. But for the other three + * (socket location dirs), we can add just the first existing one + * (basically mimic get_runtime_dir() logic). + */ + + virCommandAddEnvPass(cmd, "PIPEWIRE_CORE"); + virCommandAddEnvPass(cmd, "PIPEWIRE_REMOTE"); + + for (i = 0; i < G_N_ELEMENTS(envVars); i++) { + const char *value = getenv(envVars[i]); + + if (!value) + continue; + + virCommandAddEnvPair(cmd, envVars[i], value); + break; + } +} + + static int qemuBuildAudioCommandLineArg(virCommand *cmd, virDomainAudioDef *def) @@ -7939,6 +7993,13 @@ qemuBuildAudioCommandLineArg(virCommand *cmd, break; case VIR_DOMAIN_AUDIO_TYPE_PIPEWIRE: + if (qemuBuildAudioPipewireAudioProps(&def->backend.pipewire.input, &in) < 0 || + qemuBuildAudioPipewireAudioProps(&def->backend.pipewire.output, &out) < 0) + return -1; + + qemuBuildAudioPipewireAudioEnv(cmd); + break; + case VIR_DOMAIN_AUDIO_TYPE_LAST: default: virReportEnumRangeError(virDomainAudioType, def->type); diff --git a/tests/qemuxml2argvdata/audio-many-backends.x86_64-latest.args b/tests/qemuxml2argvdata/audio-many-backends.x86_64-latest.args index 4c6c925ccd..0bdc75689f 100644 --- a/tests/qemuxml2argvdata/audio-many-backends.x86_64-latest.args +++ b/tests/qemuxml2argvdata/audio-many-backends.x86_64-latest.args @@ -6,6 +6,7 @@ LOGNAME=test \ XDG_DATA_HOME=/var/lib/libvirt/qemu/domain--1-QEMUGuest1/.local/share \ XDG_CACHE_HOME=/var/lib/libvirt/qemu/domain--1-QEMUGuest1/.cache \ XDG_CONFIG_HOME=/var/lib/libvirt/qemu/domain--1-QEMUGuest1/.config \ +PIPEWIRE_RUNTIME_DIR=/run/user/1000 \ /usr/bin/qemu-system-x86_64 \ -name guest=QEMUGuest1,debug-threads=on \ -S \ @@ -32,6 +33,7 @@ XDG_CONFIG_HOME=/var/lib/libvirt/qemu/domain--1-QEMUGuest1/.config \ -audiodev '{"id":"audio1","driver":"none"}' \ -audiodev '{"id":"audio2","driver":"alsa"}' \ -audiodev '{"id":"audio3","driver":"pa"}' \ +-audiodev '{"id":"audio4","driver":"pipewire"}' \ -vnc 127.0.0.1:0,audiodev=audio2 \ -device '{"driver":"cirrus-vga","id":"video0","bus":"pci.0","addr":"0x2"}' \ -device '{"driver":"AC97","id":"sound0","audiodev":"audio1","bus":"pci.0","addr":"0x3"}' \ diff --git a/tests/qemuxml2argvdata/audio-many-backends.xml b/tests/qemuxml2argvdata/audio-many-backends.xml index c681784526..1659723f91 100644 --- a/tests/qemuxml2argvdata/audio-many-backends.xml +++ b/tests/qemuxml2argvdata/audio-many-backends.xml @@ -51,6 +51,7 @@ <audio id='1' type='none'/> <audio id='2' type='alsa'/> <audio id='3' type='pulseaudio'/> + <audio id='4' type='pipewire'/> <video> <model type='cirrus' vram='16384' heads='1' primary='yes'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/> diff --git a/tests/qemuxml2argvdata/audio-pipewire-best.x86_64-latest.args b/tests/qemuxml2argvdata/audio-pipewire-best.x86_64-latest.args new file mode 100644 index 0000000000..d94bd6a09e --- /dev/null +++ b/tests/qemuxml2argvdata/audio-pipewire-best.x86_64-latest.args @@ -0,0 +1,36 @@ +LC_ALL=C \ +PATH=/bin \ +HOME=/var/lib/libvirt/qemu/domain--1-QEMUGuest1 \ +USER=test \ +LOGNAME=test \ +XDG_DATA_HOME=/var/lib/libvirt/qemu/domain--1-QEMUGuest1/.local/share \ +XDG_CACHE_HOME=/var/lib/libvirt/qemu/domain--1-QEMUGuest1/.cache \ +XDG_CONFIG_HOME=/var/lib/libvirt/qemu/domain--1-QEMUGuest1/.config \ +PIPEWIRE_RUNTIME_DIR=/run/user/1000 \ +/usr/bin/qemu-system-x86_64 \ +-name guest=QEMUGuest1,debug-threads=on \ +-S \ +-object '{"qom-type":"secret","id":"masterKey0","format":"raw","file":"/var/lib/libvirt/qemu/domain--1-QEMUGuest1/master-key.aes"}' \ +-machine pc,usb=off,dump-guest-core=off,memory-backend=pc.ram,acpi=off \ +-accel tcg \ +-cpu qemu64 \ +-m size=219136k \ +-object '{"qom-type":"memory-backend-ram","id":"pc.ram","size":224395264}' \ +-overcommit mem-lock=off \ +-smp 1,sockets=1,cores=1,threads=1 \ +-uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \ +-display none \ +-no-user-config \ +-nodefaults \ +-chardev socket,id=charmonitor,fd=1729,server=on,wait=off \ +-mon chardev=charmonitor,id=monitor,mode=control \ +-rtc base=utc \ +-no-shutdown \ +-boot strict=on \ +-device '{"driver":"piix3-usb-uhci","id":"usb","bus":"pci.0","addr":"0x1.0x2"}' \ +-blockdev '{"driver":"host_cdrom","filename":"/dev/cdrom","node-name":"libvirt-1-storage","auto-read-only":true,"discard":"unmap"}' \ +-blockdev '{"node-name":"libvirt-1-format","read-only":true,"driver":"raw","file":"libvirt-1-storage"}' \ +-device '{"driver":"ide-cd","bus":"ide.1","unit":0,"drive":"libvirt-1-format","id":"ide0-1-0","bootindex":1}' \ +-audiodev '{"id":"audio1","driver":"pipewire","timer-period":50,"in":{"mixing-engine":true,"fixed-settings":true,"voices":1,"buffer-length":200,"frequency":44100,"channels":2,"format":"s16","name":"fish"},"out":{"mixing-engine":true,"fixed-settings":true,"voices":2,"buffer-length":200,"frequency":22050,"channels":4,"format":"f32","name":"fish"}}' \ +-sandbox on,obsolete=deny,elevateprivileges=deny,spawn=deny,resourcecontrol=deny \ +-msg timestamp=on diff --git a/tests/qemuxml2argvdata/audio-pipewire-full.x86_64-latest.args b/tests/qemuxml2argvdata/audio-pipewire-full.x86_64-latest.args new file mode 100644 index 0000000000..a779e5ad79 --- /dev/null +++ b/tests/qemuxml2argvdata/audio-pipewire-full.x86_64-latest.args @@ -0,0 +1,36 @@ +LC_ALL=C \ +PATH=/bin \ +HOME=/var/lib/libvirt/qemu/domain--1-QEMUGuest1 \ +USER=test \ +LOGNAME=test \ +XDG_DATA_HOME=/var/lib/libvirt/qemu/domain--1-QEMUGuest1/.local/share \ +XDG_CACHE_HOME=/var/lib/libvirt/qemu/domain--1-QEMUGuest1/.cache \ +XDG_CONFIG_HOME=/var/lib/libvirt/qemu/domain--1-QEMUGuest1/.config \ +PIPEWIRE_RUNTIME_DIR=/run/user/1000 \ +/usr/bin/qemu-system-x86_64 \ +-name guest=QEMUGuest1,debug-threads=on \ +-S \ +-object '{"qom-type":"secret","id":"masterKey0","format":"raw","file":"/var/lib/libvirt/qemu/domain--1-QEMUGuest1/master-key.aes"}' \ +-machine pc,usb=off,dump-guest-core=off,memory-backend=pc.ram,acpi=off \ +-accel tcg \ +-cpu qemu64 \ +-m size=219136k \ +-object '{"qom-type":"memory-backend-ram","id":"pc.ram","size":224395264}' \ +-overcommit mem-lock=off \ +-smp 1,sockets=1,cores=1,threads=1 \ +-uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \ +-display none \ +-no-user-config \ +-nodefaults \ +-chardev socket,id=charmonitor,fd=1729,server=on,wait=off \ +-mon chardev=charmonitor,id=monitor,mode=control \ +-rtc base=utc \ +-no-shutdown \ +-boot strict=on \ +-device '{"driver":"piix3-usb-uhci","id":"usb","bus":"pci.0","addr":"0x1.0x2"}' \ +-blockdev '{"driver":"host_cdrom","filename":"/dev/cdrom","node-name":"libvirt-1-storage","auto-read-only":true,"discard":"unmap"}' \ +-blockdev '{"node-name":"libvirt-1-format","read-only":true,"driver":"raw","file":"libvirt-1-storage"}' \ +-device '{"driver":"ide-cd","bus":"ide.1","unit":0,"drive":"libvirt-1-format","id":"ide0-1-0","bootindex":1}' \ +-audiodev '{"id":"audio1","driver":"pipewire","in":{"mixing-engine":true,"fixed-settings":true,"voices":1,"buffer-length":100,"frequency":44100,"channels":2,"format":"s16","name":"fish","stream-name":"food","latency":100},"out":{"mixing-engine":true,"fixed-settings":true,"voices":2,"buffer-length":200,"frequency":22050,"channels":4,"format":"f32","name":"fish","stream-name":"food","latency":200}}' \ +-sandbox on,obsolete=deny,elevateprivileges=deny,spawn=deny,resourcecontrol=deny \ +-msg timestamp=on diff --git a/tests/qemuxml2argvdata/audio-pipewire-minimal.x86_64-latest.args b/tests/qemuxml2argvdata/audio-pipewire-minimal.x86_64-latest.args new file mode 100644 index 0000000000..90951a3219 --- /dev/null +++ b/tests/qemuxml2argvdata/audio-pipewire-minimal.x86_64-latest.args @@ -0,0 +1,36 @@ +LC_ALL=C \ +PATH=/bin \ +HOME=/var/lib/libvirt/qemu/domain--1-QEMUGuest1 \ +USER=test \ +LOGNAME=test \ +XDG_DATA_HOME=/var/lib/libvirt/qemu/domain--1-QEMUGuest1/.local/share \ +XDG_CACHE_HOME=/var/lib/libvirt/qemu/domain--1-QEMUGuest1/.cache \ +XDG_CONFIG_HOME=/var/lib/libvirt/qemu/domain--1-QEMUGuest1/.config \ +PIPEWIRE_RUNTIME_DIR=/run/user/1000 \ +/usr/bin/qemu-system-x86_64 \ +-name guest=QEMUGuest1,debug-threads=on \ +-S \ +-object '{"qom-type":"secret","id":"masterKey0","format":"raw","file":"/var/lib/libvirt/qemu/domain--1-QEMUGuest1/master-key.aes"}' \ +-machine pc,usb=off,dump-guest-core=off,memory-backend=pc.ram,acpi=off \ +-accel tcg \ +-cpu qemu64 \ +-m size=219136k \ +-object '{"qom-type":"memory-backend-ram","id":"pc.ram","size":224395264}' \ +-overcommit mem-lock=off \ +-smp 1,sockets=1,cores=1,threads=1 \ +-uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \ +-display none \ +-no-user-config \ +-nodefaults \ +-chardev socket,id=charmonitor,fd=1729,server=on,wait=off \ +-mon chardev=charmonitor,id=monitor,mode=control \ +-rtc base=utc \ +-no-shutdown \ +-boot strict=on \ +-device '{"driver":"piix3-usb-uhci","id":"usb","bus":"pci.0","addr":"0x1.0x2"}' \ +-blockdev '{"driver":"host_cdrom","filename":"/dev/cdrom","node-name":"libvirt-1-storage","auto-read-only":true,"discard":"unmap"}' \ +-blockdev '{"node-name":"libvirt-1-format","read-only":true,"driver":"raw","file":"libvirt-1-storage"}' \ +-device '{"driver":"ide-cd","bus":"ide.1","unit":0,"drive":"libvirt-1-format","id":"ide0-1-0","bootindex":1}' \ +-audiodev '{"id":"audio1","driver":"pipewire"}' \ +-sandbox on,obsolete=deny,elevateprivileges=deny,spawn=deny,resourcecontrol=deny \ +-msg timestamp=on diff --git a/tests/qemuxml2argvtest.c b/tests/qemuxml2argvtest.c index 4fda68a4ce..2707f56024 100644 --- a/tests/qemuxml2argvtest.c +++ b/tests/qemuxml2argvtest.c @@ -869,6 +869,9 @@ mymain(void) g_unsetenv("DYLD_FORCE_FLAT_NAMESPACE"); g_unsetenv("QEMU_AUDIO_DRV"); g_unsetenv("SDL_AUDIODRIVER"); + g_unsetenv("PIPEWIRE_CORE"); + g_unsetenv("PIPEWIRE_REMOTE"); + g_unsetenv("PIPEWIRE_RUNTIME_DIR"); DO_TEST_CAPS_LATEST("minimal"); DO_TEST_CAPS_LATEST_PARSE_ERROR("minimal-no-memory"); @@ -909,6 +912,9 @@ mymain(void) DO_TEST_CAPS_LATEST("audio-jack-minimal"); DO_TEST_CAPS_LATEST("audio-oss-minimal"); DO_TEST_CAPS_LATEST("audio-pulseaudio-minimal"); + g_setenv("PIPEWIRE_RUNTIME_DIR", "/run/user/1000", TRUE); + DO_TEST_CAPS_LATEST("audio-pipewire-minimal"); + g_unsetenv("PIPEWIRE_RUNTIME_DIR"); DO_TEST_CAPS_LATEST("audio-sdl-minimal"); DO_TEST_CAPS_LATEST("audio-spice-minimal"); DO_TEST_CAPS_LATEST("audio-file-minimal"); @@ -918,6 +924,9 @@ mymain(void) DO_TEST_CAPS_LATEST("audio-coreaudio-best"); DO_TEST_CAPS_LATEST("audio-oss-best"); DO_TEST_CAPS_LATEST("audio-pulseaudio-best"); + g_setenv("PIPEWIRE_RUNTIME_DIR", "/run/user/1000", TRUE); + DO_TEST_CAPS_LATEST("audio-pipewire-best"); + g_unsetenv("PIPEWIRE_RUNTIME_DIR"); DO_TEST_CAPS_LATEST("audio-sdl-best"); DO_TEST_CAPS_LATEST("audio-spice-best"); DO_TEST_CAPS_LATEST("audio-file-best"); @@ -928,11 +937,16 @@ mymain(void) DO_TEST_CAPS_LATEST("audio-jack-full"); DO_TEST_CAPS_LATEST("audio-oss-full"); DO_TEST_CAPS_LATEST("audio-pulseaudio-full"); + g_setenv("PIPEWIRE_RUNTIME_DIR", "/run/user/1000", TRUE); + DO_TEST_CAPS_LATEST("audio-pipewire-full"); + g_unsetenv("PIPEWIRE_RUNTIME_DIR"); DO_TEST_CAPS_LATEST("audio-sdl-full"); DO_TEST_CAPS_LATEST("audio-spice-full"); DO_TEST_CAPS_LATEST("audio-file-full"); + g_setenv("PIPEWIRE_RUNTIME_DIR", "/run/user/1000", TRUE); DO_TEST_CAPS_LATEST("audio-many-backends"); + g_unsetenv("PIPEWIRE_RUNTIME_DIR"); /* Validate auto-creation of <audio> for legacy compat */ g_setenv("QEMU_AUDIO_DRV", "sdl", TRUE); diff --git a/tests/qemuxml2xmloutdata/audio-many-backends.x86_64-latest.xml b/tests/qemuxml2xmloutdata/audio-many-backends.x86_64-latest.xml index c681784526..1659723f91 100644 --- a/tests/qemuxml2xmloutdata/audio-many-backends.x86_64-latest.xml +++ b/tests/qemuxml2xmloutdata/audio-many-backends.x86_64-latest.xml @@ -51,6 +51,7 @@ <audio id='1' type='none'/> <audio id='2' type='alsa'/> <audio id='3' type='pulseaudio'/> + <audio id='4' type='pipewire'/> <video> <model type='cirrus' vram='16384' heads='1' primary='yes'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/> -- 2.41.0