service/pipewire: set device node volumes with device object

Fixes discrepancies between pulse and qs volumes, and volumes not
persisting across reboot or vt switches.

src/services/pipewire/device.hpp

@@ -0,0 +1,50 @@
+#pragma once
+
+#include <functional>
+
+#include <pipewire/core.h>
+#include <pipewire/device.h>
+#include <pipewire/type.h>
+#include <qcontainerfwd.h>
+#include <qhash.h>
+#include <qtmetamacros.h>
+#include <spa/pod/builder.h>
+
+#include "core.hpp"
+#include "registry.hpp"
+
+namespace qs::service::pipewire {
+
+class PwDevice;
+
+constexpr const char TYPE_INTERFACE_Device[] = PW_TYPE_INTERFACE_Device; // NOLINT
+class PwDevice: public PwBindable<pw_device, TYPE_INTERFACE_Device, PW_VERSION_DEVICE> {
+	Q_OBJECT;
+
+public:
+	void bindHooks() override;
+	void unbindHooks() override;
+
+	bool setVolumes(qint32 routeDevice, const QVector<float>& volumes);
+	bool setMuted(qint32 routeDevice, bool muted);
+
+private slots:
+	void polled();
+
+private:
+	static const pw_device_events EVENTS;
+	static void onInfo(void* data, const pw_device_info* info);
+	static void
+	onParam(void* data, qint32 seq, quint32 id, quint32 index, quint32 next, const spa_pod* param);
+
+	QHash<qint32, qint32> routeDeviceIndexes;
+	QHash<qint32, qint32> stagingIndexes;
+	void addDeviceIndexPairs(const spa_pod* param);
+
+	bool
+	setRouteProps(qint32 routeDevice, const std::function<void*(spa_pod_builder*)>& propsCallback);
+
+	SpaHook listener;
+};
+
+} // namespace qs::service::pipewire