service/pipewire: add pipewire module

src/services/pipewire/core.cpp

@@ -0,0 +1,87 @@
+#include "core.hpp"
+#include <cerrno>
+
+#include <pipewire/context.h>
+#include <pipewire/core.h>
+#include <pipewire/loop.h>
+#include <pipewire/pipewire.h>
+#include <qlogging.h>
+#include <qloggingcategory.h>
+#include <qobject.h>
+#include <qsocketnotifier.h>
+#include <spa/utils/defs.h>
+#include <spa/utils/hook.h>
+
+namespace qs::service::pipewire {
+
+Q_LOGGING_CATEGORY(logLoop, "quickshell.service.pipewire.loop", QtWarningMsg);
+
+PwCore::PwCore(QObject* parent): QObject(parent), notifier(QSocketNotifier::Read) {
+	qCInfo(logLoop) << "Creating pipewire event loop.";
+	pw_init(nullptr, nullptr);
+
+	this->loop = pw_loop_new(nullptr);
+	if (this->loop == nullptr) {
+		qCCritical(logLoop) << "Failed to create pipewire event loop.";
+		return;
+	}
+
+	this->context = pw_context_new(this->loop, nullptr, 0);
+	if (this->context == nullptr) {
+		qCCritical(logLoop) << "Failed to create pipewire context.";
+		return;
+	}
+
+	qCInfo(logLoop) << "Connecting to pipewire server.";
+	this->core = pw_context_connect(this->context, nullptr, 0);
+	if (this->core == nullptr) {
+		qCCritical(logLoop) << "Failed to connect pipewire context. Errno:" << errno;
+		return;
+	}
+
+	qCInfo(logLoop) << "Linking pipewire event loop.";
+	// Tie the pw event loop into qt.
+	auto fd = pw_loop_get_fd(this->loop);
+	this->notifier.setSocket(fd);
+	QObject::connect(&this->notifier, &QSocketNotifier::activated, this, &PwCore::poll);
+	this->notifier.setEnabled(true);
+}
+
+PwCore::~PwCore() {
+	qCInfo(logLoop) << "Destroying PwCore.";
+
+	if (this->loop != nullptr) {
+		if (this->context != nullptr) {
+			if (this->core != nullptr) {
+				pw_core_disconnect(this->core);
+			}
+
+			pw_context_destroy(this->context);
+		}
+
+		pw_loop_destroy(this->loop);
+	}
+}
+
+bool PwCore::isValid() const {
+	// others must init first
+	return this->core != nullptr;
+}
+
+void PwCore::poll() const {
+	qCDebug(logLoop) << "Pipewire event loop received new events, iterating.";
+	// Spin pw event loop.
+	pw_loop_iterate(this->loop, 0);
+	qCDebug(logLoop) << "Done iterating pipewire event loop.";
+}
+
+SpaHook::SpaHook() { // NOLINT
+	spa_zero(this->hook);
+}
+
+void SpaHook::remove() {
+	spa_hook_remove(&this->hook);
+	spa_zero(this->hook);
+}
+
+} // namespace qs::service::pipewire