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+/* This file is part of Ingen.
+ * Copyright (C) 2007-2009 Dave Robillard <http://drobilla.net>
+ *
+ * Ingen is free software; you can redistribute it and/or modify it under the
+ * terms of the GNU General Public License as published by the Free Software
+ * Foundation; either version 2 of the License, or (at your option) any later
+ * version.
+ *
+ * Ingen is distributed in the hope that it will be useful, but WITHOUT ANY
+ * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+ * FOR A PARTICULAR PURPOSE. See the GNU General Public License for details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef JACKAUDIODRIVER_H
+#define JACKAUDIODRIVER_H
+
+#include <jack/jack.h>
+#include <jack/transport.h>
+#include "raul/AtomicInt.hpp"
+#include "raul/List.hpp"
+#include "raul/Semaphore.hpp"
+#include "raul/Thread.hpp"
+#include "Driver.hpp"
+#include "Buffer.hpp"
+#include "ProcessContext.hpp"
+
+namespace Raul { class Path; }
+
+namespace Ingen {
+
+class Engine;
+class PatchImpl;
+class PortImpl;
+class DuplexPort;
+class JackAudioDriver;
+typedef jack_default_audio_sample_t jack_sample_t;
+
+
+/** Used internally by JackAudioDriver to represent a Jack port.
+ *
+ * A Jack port always has a one-to-one association with a Patch port.
+ */
+class JackAudioPort : public DriverPort, public Raul::List<JackAudioPort*>::Node
+{
+public:
+ JackAudioPort(JackAudioDriver* driver, DuplexPort* patch_port);
+ ~JackAudioPort();
+
+ void create();
+ void destroy();
+
+ void move(const Raul::Path& path);
+
+ void pre_process(ProcessContext& context);
+ void post_process(ProcessContext& context);
+
+ jack_port_t* jack_port() const { return _jack_port; }
+
+private:
+ JackAudioDriver* _driver;
+ jack_port_t* _jack_port;
+};
+
+
+
+/** The Jack Driver.
+ *
+ * The process callback here drives the entire audio thread by "pulling"
+ * events from queues, processing them, running the patches, and passing
+ * events along to the PostProcessor.
+ *
+ * \ingroup engine
+ */
+class JackAudioDriver : public Driver
+{
+public:
+ JackAudioDriver(Engine& engine);
+ ~JackAudioDriver();
+
+ bool supports(Shared::PortType port_type, Shared::EventType event_type);
+
+ bool attach(const std::string& server_name,
+ const std::string& client_name,
+ void* jack_client);
+
+ void activate();
+ void deactivate();
+ void enable();
+ void disable();
+
+ DriverPort* port(const Raul::Path& path);
+ DriverPort* create_port(DuplexPort* patch_port);
+
+ void add_port(DriverPort* port);
+ DriverPort* driver_port(const Raul::Path& path);
+
+ Raul::List<DriverPort*>::Node* remove_port(const Raul::Path& path);
+
+ PatchImpl* root_patch() { return _root_patch; }
+ void set_root_patch(PatchImpl* patch) { _root_patch = patch; }
+
+ ProcessContext& context() { return _process_context; }
+
+ /** Transport state for this frame.
+ * Intended to only be called from the audio thread. */
+ inline const jack_position_t* position() { return &_position; }
+ inline jack_transport_state_t transport_state() { return _transport_state; }
+
+ bool is_realtime() const { return jack_is_realtime(_client); }
+
+ jack_client_t* jack_client() const { return _client; }
+ SampleCount buffer_size() const { return _buffer_size; }
+ SampleCount sample_rate() const { return _sample_rate; }
+ bool is_activated() const { return _is_activated; }
+
+ inline SampleCount frame_time() const { return _client ? jack_frame_time(_client) : 0; }
+
+ class PortRegistrationFailedException : public std::exception {};
+
+private:
+ friend class JackAudioPort;
+
+ // Static JACK callbacks which call the non-static callbacks (methods)
+ inline static void thread_init_cb(void* const jack_driver) {
+ return ((JackAudioDriver*)jack_driver)->_thread_init_cb();
+ }
+ inline static void shutdown_cb(void* const jack_driver) {
+ return ((JackAudioDriver*)jack_driver)->_shutdown_cb();
+ }
+ inline static int process_cb(jack_nframes_t nframes, void* const jack_driver) {
+ return ((JackAudioDriver*)jack_driver)->_process_cb(nframes);
+ }
+ inline static int buffer_size_cb(jack_nframes_t nframes, void* const jack_driver) {
+ return ((JackAudioDriver*)jack_driver)->_buffer_size_cb(nframes);
+ }
+ inline static int sample_rate_cb(jack_nframes_t nframes, void* const jack_driver) {
+ return ((JackAudioDriver*)jack_driver)->_sample_rate_cb(nframes);
+ }
+
+ // Non static callbacks (methods)
+ void _thread_init_cb();
+ void _shutdown_cb();
+ int _process_cb(jack_nframes_t nframes);
+ int _buffer_size_cb(jack_nframes_t nframes);
+ int _sample_rate_cb(jack_nframes_t nframes);
+
+ Engine& _engine;
+ Raul::Thread* _jack_thread;
+ Raul::Semaphore _sem;
+ Raul::AtomicInt _flag;
+ jack_client_t* _client;
+ jack_nframes_t _buffer_size;
+ jack_nframes_t _sample_rate;
+ uint32_t _midi_event_type;
+ bool _is_activated;
+ bool _local_client; ///< Whether _client should be closed on destruction
+ jack_position_t _position;
+ jack_transport_state_t _transport_state;
+
+ Raul::List<JackAudioPort*> _ports;
+ ProcessContext _process_context;
+
+ PatchImpl* _root_patch;
+};
+
+
+} // namespace Ingen
+
+#endif // JACKAUDIODRIVER_H