177 lines
5.4 KiB
C++
177 lines
5.4 KiB
C++
/* This file is part of Om. Copyright (C) 2006 Dave Robillard.
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*
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* Om is free software; you can redistribute it and/or modify it under the
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* terms of the GNU General Public License as published by the Free Software
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* Foundation; either version 2 of the License, or (at your option) any later
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* version.
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*
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* Om is distributed in the hope that it will be useful, but WITHOUT ANY
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* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GNU General Public License for details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef JACKAUDIODRIVER_H
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#define JACKAUDIODRIVER_H
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#include <jack/jack.h>
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#include <jack/transport.h>
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#include "List.h"
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#include "AudioDriver.h"
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#include "Buffer.h"
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namespace Om {
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class Patch;
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class Port;
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template <typename T> class PortBase;
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class JackAudioDriver;
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typedef jack_default_audio_sample_t jack_sample_t;
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/** Used internally by JackAudioDriver to represent a Jack port.
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*
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* A Jack port always has a one-to-one association with a Patch port.
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*/
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class JackAudioPort : public DriverPort, public ListNode<JackAudioPort*>
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{
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public:
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JackAudioPort(JackAudioDriver* driver, PortBase<sample>* patch_port);
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~JackAudioPort();
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void add_to_driver();
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void remove_from_driver();
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void set_name(const string& name) { jack_port_set_name(m_jack_port, name.c_str()); };
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void prepare_buffer(jack_nframes_t nframes);
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jack_port_t* jack_port() const { return m_jack_port; }
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DriverBuffer<sample>* buffer() const { return m_jack_buffer; }
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void jack_buffer(jack_sample_t* s) { m_jack_buffer->set_data(s); }
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PortBase<sample>* patch_port() const { return m_patch_port; }
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private:
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// Prevent copies (undefined)
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JackAudioPort(const JackAudioPort&);
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JackAudioPort& operator=(const JackAudioPort&);
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JackAudioDriver* m_driver;
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jack_port_t* m_jack_port;
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DriverBuffer<sample>* m_jack_buffer;
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PortBase<sample>* m_patch_port;
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};
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/** The Jack AudioDriver.
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*
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* The process callback here drives the entire audio thread by "pulling"
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* events from queues, processing them, running the patches, and passing
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* events along to the PostProcessor.
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*
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* \ingroup engine
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*/
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class JackAudioDriver : public AudioDriver
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{
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public:
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JackAudioDriver();
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JackAudioDriver(jack_client_t *jack_client);
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~JackAudioDriver();
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void activate();
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void deactivate();
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void enable();
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void disable();
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void process_events(jack_nframes_t block_start, jack_nframes_t block_end);
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DriverPort* create_port(PortBase<sample>* patch_port);
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Patch* root_patch() { return m_root_patch; }
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void set_root_patch(Patch* patch) { m_root_patch = patch; }
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/** Transport state for this frame.
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* Intended to only be called from the audio thread. */
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inline const jack_position_t* position() { return &m_position; }
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inline const jack_transport_state_t transport_state() { return m_transport_state; }
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bool is_realtime() { return jack_is_realtime(m_client); }
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jack_client_t* jack_client() const { return m_client; }
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samplecount buffer_size() const { return m_buffer_size; }
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samplecount sample_rate() const { return m_sample_rate; }
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bool is_activated() const { return m_is_activated; }
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samplecount time_stamp() const { return jack_frame_time(m_client); }
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private:
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// Prevent copies (undefined)
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JackAudioDriver(const JackAudioDriver&);
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JackAudioDriver& operator=(const JackAudioDriver&);
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friend class JackAudioPort;
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// Functions for JackAudioPort
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void add_port(JackAudioPort* port);
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JackAudioPort* remove_port(JackAudioPort* port);
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// These are the static versions of the callbacks, they call
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// the non-static ones below
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inline static int process_cb(jack_nframes_t nframes, void* const jack_driver);
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inline static void shutdown_cb(void* const jack_driver);
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inline static int buffer_size_cb(jack_nframes_t nframes, void* const jack_driver);
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inline static int sample_rate_cb(jack_nframes_t nframes, void* const jack_driver);
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// Non static callbacks
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int m_process_cb(jack_nframes_t nframes);
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void m_shutdown_cb();
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int m_buffer_size_cb(jack_nframes_t nframes);
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int m_sample_rate_cb(jack_nframes_t nframes);
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jack_client_t* m_client;
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jack_nframes_t m_buffer_size;
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jack_nframes_t m_sample_rate;
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bool m_is_activated;
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bool m_local_client; ///< Whether m_client should be closed on destruction
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jack_position_t m_position;
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jack_transport_state_t m_transport_state;
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List<JackAudioPort*> m_ports;
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Patch* m_root_patch;
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jack_nframes_t m_start_of_current_cycle;
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jack_nframes_t m_start_of_last_cycle;
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};
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inline int JackAudioDriver::process_cb(jack_nframes_t nframes, void* jack_driver)
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{
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return ((JackAudioDriver*)jack_driver)->m_process_cb(nframes);
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}
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inline void JackAudioDriver::shutdown_cb(void* jack_driver)
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{
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return ((JackAudioDriver*)jack_driver)->m_shutdown_cb();
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}
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inline int JackAudioDriver::buffer_size_cb(jack_nframes_t nframes, void* jack_driver)
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{
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return ((JackAudioDriver*)jack_driver)->m_buffer_size_cb(nframes);
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}
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inline int JackAudioDriver::sample_rate_cb(jack_nframes_t nframes, void* jack_driver)
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{
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return ((JackAudioDriver*)jack_driver)->m_sample_rate_cb(nframes);
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}
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} // namespace Om
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#endif // JACKAUDIODRIVER_H
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