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+/* This file is part of Om. Copyright (C) 2006 Dave Robillard.
+ *
+ * Om 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.
+ *
+ * Om 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.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#ifndef JACKAUDIODRIVER_H
+#define JACKAUDIODRIVER_H
+
+#include <jack/jack.h>
+#include <jack/transport.h>
+#include "List.h"
+#include "AudioDriver.h"
+#include "Buffer.h"
+
+namespace Om {
+
+class Patch;
+class Port;
+template <typename T> class PortBase;
+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 ListNode<JackAudioPort*>
+{
+public:
+ JackAudioPort(JackAudioDriver* driver, PortBase<sample>* patch_port);
+ ~JackAudioPort();
+
+ void add_to_driver();
+ void remove_from_driver();
+ void set_name(const string& name) { jack_port_set_name(m_jack_port, name.c_str()); };
+
+ void prepare_buffer(jack_nframes_t nframes);
+
+ jack_port_t* jack_port() const { return m_jack_port; }
+ DriverBuffer<sample>* buffer() const { return m_jack_buffer; }
+ void jack_buffer(jack_sample_t* s) { m_jack_buffer->set_data(s); }
+ PortBase<sample>* patch_port() const { return m_patch_port; }
+
+private:
+ // Prevent copies (undefined)
+ JackAudioPort(const JackAudioPort&);
+ JackAudioPort& operator=(const JackAudioPort&);
+
+ JackAudioDriver* m_driver;
+ jack_port_t* m_jack_port;
+ DriverBuffer<sample>* m_jack_buffer;
+ PortBase<sample>* m_patch_port;
+};
+
+
+
+/** The Jack AudioDriver.
+ *
+ * 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 AudioDriver
+{
+public:
+ JackAudioDriver();
+ JackAudioDriver(jack_client_t *jack_client);
+ ~JackAudioDriver();
+
+ void activate();
+ void deactivate();
+ void enable();
+ void disable();
+
+ void process_events(jack_nframes_t block_start, jack_nframes_t block_end);
+
+ DriverPort* create_port(PortBase<sample>* patch_port);
+
+ Patch* root_patch() { return m_root_patch; }
+ void set_root_patch(Patch* patch) { m_root_patch = patch; }
+
+ /** Transport state for this frame.
+ * Intended to only be called from the audio thread. */
+ inline const jack_position_t* position() { return &m_position; }
+ inline const jack_transport_state_t transport_state() { return m_transport_state; }
+
+ bool is_realtime() { return jack_is_realtime(m_client); }
+
+ jack_client_t* jack_client() const { return m_client; }
+ samplecount buffer_size() const { return m_buffer_size; }
+ samplecount sample_rate() const { return m_sample_rate; }
+ bool is_activated() const { return m_is_activated; }
+
+ samplecount time_stamp() const { return jack_frame_time(m_client); }
+
+private:
+ // Prevent copies (undefined)
+ JackAudioDriver(const JackAudioDriver&);
+ JackAudioDriver& operator=(const JackAudioDriver&);
+
+ friend class JackAudioPort;
+
+ // Functions for JackAudioPort
+ void add_port(JackAudioPort* port);
+ JackAudioPort* remove_port(JackAudioPort* port);
+
+ // These are the static versions of the callbacks, they call
+ // the non-static ones below
+ inline static int process_cb(jack_nframes_t nframes, void* const jack_driver);
+ inline static void shutdown_cb(void* const jack_driver);
+ inline static int buffer_size_cb(jack_nframes_t nframes, void* const jack_driver);
+ inline static int sample_rate_cb(jack_nframes_t nframes, void* const jack_driver);
+
+ // Non static callbacks
+ int m_process_cb(jack_nframes_t nframes);
+ void m_shutdown_cb();
+ int m_buffer_size_cb(jack_nframes_t nframes);
+ int m_sample_rate_cb(jack_nframes_t nframes);
+
+ jack_client_t* m_client;
+ jack_nframes_t m_buffer_size;
+ jack_nframes_t m_sample_rate;
+ bool m_is_activated;
+ bool m_local_client; ///< Whether m_client should be closed on destruction
+ jack_position_t m_position;
+ jack_transport_state_t m_transport_state;
+
+ List<JackAudioPort*> m_ports;
+
+ Patch* m_root_patch;
+
+ jack_nframes_t m_start_of_current_cycle;
+ jack_nframes_t m_start_of_last_cycle;
+};
+
+
+inline int JackAudioDriver::process_cb(jack_nframes_t nframes, void* jack_driver)
+{
+ return ((JackAudioDriver*)jack_driver)->m_process_cb(nframes);
+}
+
+inline void JackAudioDriver::shutdown_cb(void* jack_driver)
+{
+ return ((JackAudioDriver*)jack_driver)->m_shutdown_cb();
+}
+
+
+inline int JackAudioDriver::buffer_size_cb(jack_nframes_t nframes, void* jack_driver)
+{
+ return ((JackAudioDriver*)jack_driver)->m_buffer_size_cb(nframes);
+}
+
+
+inline int JackAudioDriver::sample_rate_cb(jack_nframes_t nframes, void* jack_driver)
+{
+ return ((JackAudioDriver*)jack_driver)->m_sample_rate_cb(nframes);
+}
+
+
+} // namespace Om
+
+#endif // JACKAUDIODRIVER_H