From b848d9ccbd94f88e3b1b9f1884a05efcea377dfc Mon Sep 17 00:00:00 2001
From: David Robillard <d@drobilla.net>
Date: Sun, 29 Nov 2020 18:02:59 +0100
Subject: Completely isolate drivers from the rest of the application

---
 src/JackDbusDriver.cpp | 83 ++++++++++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 81 insertions(+), 2 deletions(-)

(limited to 'src/JackDbusDriver.cpp')

diff --git a/src/JackDbusDriver.cpp b/src/JackDbusDriver.cpp
index add838d..c656594 100644
--- a/src/JackDbusDriver.cpp
+++ b/src/JackDbusDriver.cpp
@@ -15,8 +15,6 @@
  * along with Patchage.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-#include "JackDbusDriver.hpp"
-
 #include "ClientType.hpp"
 #include "Driver.hpp"
 #include "ILog.hpp"
@@ -24,6 +22,7 @@
 #include "PortNames.hpp"
 #include "PortType.hpp"
 #include "SignalDirection.hpp"
+#include "make_jack_driver.hpp"
 #include "warnings.hpp"
 
 PATCHAGE_DISABLE_FMT_WARNINGS
@@ -37,6 +36,7 @@ PATCHAGE_RESTORE_WARNINGS
 #include <glib.h>
 
 #include <cassert>
+#include <cstdint>
 #include <cstring>
 #include <set>
 #include <string>
@@ -54,6 +54,78 @@ PATCHAGE_RESTORE_WARNINGS
 #define JACKDBUS_PORT_TYPE_AUDIO 0
 #define JACKDBUS_PORT_TYPE_MIDI  1
 
+/// Driver for JACK audio and midi ports that uses D-Bus
+class JackDriver : public AudioDriver
+{
+public:
+	explicit JackDriver(ILog& log, EventSink emit_event);
+
+	JackDriver(const JackDriver&) = delete;
+	JackDriver& operator=(const JackDriver&) = delete;
+
+	JackDriver(JackDriver&&) = delete;
+	JackDriver& operator=(JackDriver&&) = delete;
+
+	~JackDriver() override;
+
+	// Driver interface
+	void attach(bool launch_daemon) override;
+	void detach() override;
+	bool is_attached() const override;
+	void refresh(const EventSink& sink) override;
+	bool connect(const PortID& tail_id, const PortID& head_id) override;
+	bool disconnect(const PortID& tail_id, const PortID& head_id) override;
+
+	// AudioDriver interface
+	uint32_t xruns() override;
+	void     reset_xruns() override;
+	uint32_t buffer_size() override;
+	bool     set_buffer_size(uint32_t frames) override;
+	uint32_t sample_rate() override;
+
+private:
+	PortType patchage_port_type(dbus_uint32_t dbus_port_type) const;
+
+	PortInfo port_info(const std::string& port_name,
+	                   dbus_uint32_t      port_type,
+	                   dbus_uint32_t      port_flags) const;
+
+	void error_msg(const std::string& msg) const;
+	void info_msg(const std::string& msg) const;
+
+	bool call(bool          response_expected,
+	          const char*   iface,
+	          const char*   method,
+	          DBusMessage** reply_ptr_ptr,
+	          int           in_type,
+	          ...);
+
+	void update_attached();
+
+	bool is_started();
+
+	void start_server();
+
+	void stop_server();
+
+	static DBusHandlerResult dbus_message_hook(DBusConnection* connection,
+	                                           DBusMessage*    message,
+	                                           void*           jack_driver);
+
+	void on_jack_appeared();
+
+	void on_jack_disappeared();
+
+	ILog&           _log;
+	DBusError       _dbus_error;
+	DBusConnection* _dbus_connection;
+
+	mutable bool _server_responding;
+	bool         _server_started;
+
+	dbus_uint64_t _graph_version;
+};
+
 JackDriver::JackDriver(ILog& log, EventSink emit_event)
     : AudioDriver{std::move(emit_event)}
     , _log(log)
@@ -900,3 +972,10 @@ JackDriver::info_msg(const std::string& msg) const
 {
 	_log.info(std::string{"[JACK] "} + msg);
 }
+
+std::unique_ptr<AudioDriver>
+make_jack_driver(ILog& log, Driver::EventSink emit_event)
+{
+	return std::unique_ptr<AudioDriver>{
+	    new JackDriver{log, std::move(emit_event)}};
+}
-- 
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