/*
- Copyright (C) 2002-2004 Paul Davis
+ Copyright (C) 2002-2004 Paul Davis
- This program 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.
+ This program 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.
- This program 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 more details.
+ This program 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 more 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "ardour/ardour.h"
#include "ardour/data_type.h"
#include "ardour/session_handle.h"
+#include "ardour/libardour_visibility.h"
#include "ardour/types.h"
#include "ardour/chan_count.h"
#include "ardour/port_manager.h"
-#ifdef HAVE_JACK_SESSION
-#include <jack/session.h>
-#endif
-
class MTDM;
namespace ARDOUR {
class InternalPort;
class MidiPort;
+class MIDIDM;
class Port;
class Session;
class ProcessThread;
class AudioBackend;
-class AudioBackendInfo;
+struct AudioBackendInfo;
-class AudioEngine : public SessionHandlePtr, public PortManager
+class LIBARDOUR_API AudioEngine : public PortManager, public SessionHandlePtr
{
-public:
-
- static AudioEngine* create ();
-
- virtual ~AudioEngine ();
-
- int discover_backends();
- std::vector<const AudioBackendInfo*> available_backends() const;
- std::string current_backend_name () const;
- boost::shared_ptr<AudioBackend> set_backend (const std::string&, const std::string& arg1, const std::string& arg2);
- boost::shared_ptr<AudioBackend> current_backend() const { return _backend; }
- bool setup_required () const;
-
- ProcessThread* main_thread() const { return _main_thread; }
-
- /* START BACKEND PROXY API
- *
- * See audio_backend.h for full documentation and semantics. These wrappers
- * just forward to a backend implementation.
- */
-
- int start ();
- int stop ();
- int pause ();
- int freewheel (bool start_stop);
- float get_cpu_load() const ;
- void transport_start ();
- void transport_stop ();
- TransportState transport_state ();
- void transport_locate (framepos_t pos);
- framepos_t transport_frame();
- framecnt_t sample_rate () const;
- pframes_t samples_per_cycle () const;
- int usecs_per_cycle () const;
- size_t raw_buffer_size (DataType t);
- pframes_t sample_time ();
- pframes_t sample_time_at_cycle_start ();
- pframes_t samples_since_cycle_start ();
- bool get_sync_offset (pframes_t& offset) const;
-
- int create_process_thread (boost::function<void()> func);
- int join_process_threads ();
- bool in_process_thread ();
- uint32_t process_thread_count ();
-
- bool is_realtime() const;
- bool connected() const;
-
- int set_device_name (const std::string&);
- int set_sample_rate (float);
- int set_buffer_size (uint32_t);
- int set_sample_format (SampleFormat);
- int set_interleaved (bool yn);
- int set_input_channels (uint32_t);
- int set_output_channels (uint32_t);
- int set_systemic_input_latency (uint32_t);
- int set_systemic_output_latency (uint32_t);
-
- /* END BACKEND PROXY API */
-
- bool freewheeling() const { return _freewheeling; }
- bool running() const { return _running; }
-
- Glib::Threads::Mutex& process_lock() { return _process_lock; }
-
- int request_buffer_size (pframes_t samples) {
- return set_buffer_size (samples);
- }
-
- framecnt_t processed_frames() const { return _processed_frames; }
-
- void set_session (Session *);
- void remove_session (); // not a replacement for SessionHandle::session_going_away()
- Session* session() const { return _session; }
-
- class NoBackendAvailable : public std::exception {
- public:
- virtual const char *what() const throw() { return "could not connect to engine backend"; }
- };
-
- void split_cycle (pframes_t offset);
-
- int reset_timebase ();
-
- void update_latencies ();
-
- /* this signal is sent for every process() cycle while freewheeling.
- (the regular process() call to session->process() is not made)
- */
-
- PBD::Signal1<int, pframes_t> Freewheel;
-
- PBD::Signal0<void> Xrun;
-
- /* this signal is emitted if the sample rate changes */
-
- PBD::Signal1<void, framecnt_t> SampleRateChanged;
-
- /* this signal is sent if the backend ever disconnects us */
-
- PBD::Signal1<void,const char*> Halted;
-
- /* these two are emitted when the engine itself is
- started and stopped
- */
-
- PBD::Signal0<void> Running;
- PBD::Signal0<void> Stopped;
-
- static AudioEngine* instance() { return _instance; }
- static void destroy();
- void died ();
-
- /* The backend will cause these at the appropriate time(s)
- */
- int process_callback (pframes_t nframes);
- int buffer_size_change (pframes_t nframes);
- int sample_rate_change (pframes_t nframes);
- void freewheel_callback (bool);
- void timebase_callback (TransportState state, pframes_t nframes, framepos_t pos, int new_position);
- int sync_callback (TransportState state, framepos_t position);
- int port_registration_callback ();
- void latency_callback (bool for_playback);
- void halted_callback (const char* reason);
-
- /* sets up the process callback thread */
- static void thread_init_callback (void *);
-
- /* latency measurement */
-
- MTDM* mtdm();
- int prepare_for_latency_measurement ();
- void start_latency_detection ();
- void stop_latency_detection ();
- void set_latency_input_port (const std::string&);
- void set_latency_output_port (const std::string&);
- uint32_t latency_signal_delay () const { return _latency_signal_latency; }
+ public:
+
+ static AudioEngine* create ();
+
+ virtual ~AudioEngine ();
+
+ int discover_backends();
+ std::vector<const AudioBackendInfo*> available_backends() const;
+ std::string current_backend_name () const;
+ boost::shared_ptr<AudioBackend> set_default_backend ();
+ boost::shared_ptr<AudioBackend> set_backend (const std::string&, const std::string& arg1, const std::string& arg2);
+ boost::shared_ptr<AudioBackend> current_backend() const { return _backend; }
+ bool setup_required () const;
+
+ ProcessThread* main_thread() const { return _main_thread; }
+
+ /* START BACKEND PROXY API
+ *
+ * See audio_backend.h for full documentation and semantics. These wrappers
+ * just forward to a backend implementation.
+ */
+
+ int start (bool for_latency_measurement=false);
+ int stop (bool for_latency_measurement=false);
+ int freewheel (bool start_stop);
+ float get_dsp_load() const ;
+ void transport_start ();
+ void transport_stop ();
+ TransportState transport_state ();
+ void transport_locate (framepos_t pos);
+ framepos_t transport_frame();
+ framecnt_t sample_rate () const;
+ pframes_t samples_per_cycle () const;
+ int usecs_per_cycle () const;
+ size_t raw_buffer_size (DataType t);
+ framepos_t sample_time ();
+ framepos_t sample_time_at_cycle_start ();
+ pframes_t samples_since_cycle_start ();
+ bool get_sync_offset (pframes_t& offset) const;
+
+ std::string get_last_backend_error () const { return _last_backend_error_string; }
+
+ int create_process_thread (boost::function<void()> func);
+ int join_process_threads ();
+ bool in_process_thread ();
+ uint32_t process_thread_count ();
+
+ int backend_reset_requested();
+ void request_backend_reset();
+ void request_device_list_update();
+ void launch_device_control_app();
+
+ bool is_realtime() const;
+ bool connected() const;
+
+ // for the user which hold state_lock to check if reset operation is pending
+ bool is_reset_requested() const { return g_atomic_int_get(const_cast<gint*>(&_hw_reset_request_count)); }
+
+ int set_device_name (const std::string&);
+ int set_sample_rate (float);
+ int set_buffer_size (uint32_t);
+ int set_interleaved (bool yn);
+ int set_input_channels (uint32_t);
+ int set_output_channels (uint32_t);
+ int set_systemic_input_latency (uint32_t);
+ int set_systemic_output_latency (uint32_t);
+
+ /* END BACKEND PROXY API */
+
+ bool freewheeling() const { return _freewheeling; }
+ bool running() const { return _running; }
+
+ Glib::Threads::Mutex& process_lock() { return _process_lock; }
+ Glib::Threads::RecMutex& state_lock() { return _state_lock; }
+
+ int request_buffer_size (pframes_t samples) {
+ return set_buffer_size (samples);
+ }
+
+ framecnt_t processed_frames() const { return _processed_frames; }
+
+ void set_session (Session *);
+ void remove_session (); // not a replacement for SessionHandle::session_going_away()
+ Session* session() const { return _session; }
+
+ void reconnect_session_routes (bool reconnect_inputs = true, bool reconnect_outputs = true);
+
+ class NoBackendAvailable : public std::exception {
+ public:
+ virtual const char *what() const throw() { return "could not connect to engine backend"; }
+ };
+
+ void split_cycle (pframes_t offset);
+
+ int reset_timebase ();
+
+ void update_latencies ();
+
+ /* this signal is sent for every process() cycle while freewheeling.
+ (the regular process() call to session->process() is not made)
+ */
+
+ PBD::Signal1<int, pframes_t> Freewheel;
+
+ PBD::Signal0<void> Xrun;
+
+ /** this signal is emitted if the sample rate changes */
+ PBD::Signal1<void, framecnt_t> SampleRateChanged;
+
+ /** this signal is emitted if the buffer size changes */
+ PBD::Signal1<void, pframes_t> BufferSizeChanged;
+
+ /** this signal is emitted if the device cannot operate properly */
+ PBD::Signal0<void> DeviceError;
+
+ /* this signal is emitted if the device list changed */
+
+ PBD::Signal0<void> DeviceListChanged;
+
+ /* this signal is sent if the backend ever disconnects us */
+
+ PBD::Signal1<void,const char*> Halted;
+
+ /* these two are emitted when the engine itself is
+ started and stopped
+ */
+
+ PBD::Signal0<void> Running;
+ PBD::Signal0<void> Stopped;
+
+ /* these two are emitted when a device reset is initiated/finished
+ */
+
+ PBD::Signal0<void> DeviceResetStarted;
+ PBD::Signal0<void> DeviceResetFinished;
+
+ static AudioEngine* instance() { return _instance; }
+ static void destroy();
+ void died ();
+
+ /* The backend will cause these at the appropriate time(s)
+ */
+ int process_callback (pframes_t nframes);
+ int buffer_size_change (pframes_t nframes);
+ int sample_rate_change (pframes_t nframes);
+ void freewheel_callback (bool);
+ void timebase_callback (TransportState state, pframes_t nframes, framepos_t pos, int new_position);
+ int sync_callback (TransportState state, framepos_t position);
+ int port_registration_callback ();
+ void latency_callback (bool for_playback);
+ void halted_callback (const char* reason);
+
+ /* checks if current thread is properly set up for audio processing */
+ static bool thread_initialised_for_audio_processing ();
+
+ /* sets up the process callback thread */
+ static void thread_init_callback (void *);
+
+ /* latency measurement */
+
+ MTDM* mtdm() { return _mtdm; }
+ MIDIDM* mididm() { return _mididm; }
+
+ int prepare_for_latency_measurement ();
+ int start_latency_detection (bool);
+ void stop_latency_detection ();
+ void set_latency_input_port (const std::string&);
+ void set_latency_output_port (const std::string&);
+ uint32_t latency_signal_delay () const { return _latency_signal_latency; }
+
+ enum LatencyMeasurement {
+ MeasureNone,
+ MeasureAudio,
+ MeasureMIDI
+ };
+
+ LatencyMeasurement measuring_latency () const { return _measuring_latency; }
+
+ /* These two are used only in builds where SILENCE_AFTER_SECONDS was
+ * set. BecameSilent will be emitted when the audioengine goes silent.
+ * reset_silence_countdown() can be used to reset the silence
+ * countdown, whose duration will be reduced to half of its previous
+ * value.
+ */
+
+ PBD::Signal0<void> BecameSilent;
+ void reset_silence_countdown ();
private:
- AudioEngine ();
-
- static AudioEngine* _instance;
-
- Glib::Threads::Mutex _process_lock;
- Glib::Threads::Cond session_removed;
- bool session_remove_pending;
- frameoffset_t session_removal_countdown;
- gain_t session_removal_gain;
- gain_t session_removal_gain_step;
- bool _running;
- bool _freewheeling;
- /// number of frames between each check for changes in monitor input
- framecnt_t monitor_check_interval;
- /// time of the last monitor check in frames
- framecnt_t last_monitor_check;
- /// the number of frames processed since start() was called
- framecnt_t _processed_frames;
- Glib::Threads::Thread* m_meter_thread;
- ProcessThread* _main_thread;
- MTDM* _mtdm;
- bool _measuring_latency;
- PortEngine::PortHandle _latency_input_port;
- PortEngine::PortHandle _latency_output_port;
- framecnt_t _latency_flush_frames;
- std::string _latency_input_name;
- std::string _latency_output_name;
- framecnt_t _latency_signal_latency;
- bool _started_for_latency;
- bool _in_destructor;
-
- void meter_thread ();
- void start_metering_thread ();
- void stop_metering_thread ();
-
- static gint m_meter_exit;
-
- typedef std::map<std::string,AudioBackendInfo*> BackendMap;
- BackendMap _backends;
- AudioBackendInfo* backend_discover (const std::string&);
- void drop_backend ();
+ AudioEngine ();
+
+ static AudioEngine* _instance;
+
+ Glib::Threads::Mutex _process_lock;
+ Glib::Threads::RecMutex _state_lock;
+ Glib::Threads::Cond session_removed;
+ bool session_remove_pending;
+ frameoffset_t session_removal_countdown;
+ gain_t session_removal_gain;
+ gain_t session_removal_gain_step;
+ bool _running;
+ bool _freewheeling;
+ /// number of frames between each check for changes in monitor input
+ framecnt_t monitor_check_interval;
+ /// time of the last monitor check in frames
+ framecnt_t last_monitor_check;
+ /// the number of frames processed since start() was called
+ framecnt_t _processed_frames;
+ Glib::Threads::Thread* m_meter_thread;
+ ProcessThread* _main_thread;
+ MTDM* _mtdm;
+ MIDIDM* _mididm;
+ LatencyMeasurement _measuring_latency;
+ PortEngine::PortHandle _latency_input_port;
+ PortEngine::PortHandle _latency_output_port;
+ framecnt_t _latency_flush_frames;
+ std::string _latency_input_name;
+ std::string _latency_output_name;
+ framecnt_t _latency_signal_latency;
+ bool _stopped_for_latency;
+ bool _started_for_latency;
+ bool _in_destructor;
+
+ std::string _last_backend_error_string;
+
+ Glib::Threads::Thread* _hw_reset_event_thread;
+ gint _hw_reset_request_count;
+ Glib::Threads::Cond _hw_reset_condition;
+ Glib::Threads::Mutex _reset_request_lock;
+ gint _stop_hw_reset_processing;
+ Glib::Threads::Thread* _hw_devicelist_update_thread;
+ gint _hw_devicelist_update_count;
+ Glib::Threads::Cond _hw_devicelist_update_condition;
+ Glib::Threads::Mutex _devicelist_update_lock;
+ gint _stop_hw_devicelist_processing;
+
+ void start_hw_event_processing();
+ void stop_hw_event_processing();
+ void do_reset_backend();
+ void do_devicelist_update();
+
+ typedef std::map<std::string,AudioBackendInfo*> BackendMap;
+ BackendMap _backends;
+ AudioBackendInfo* backend_discover (const std::string&);
+ void drop_backend ();
+
+#ifdef SILENCE_AFTER
+ framecnt_t _silence_countdown;
+ uint32_t _silence_hit_cnt;
+#endif
+
};
-
+
} // namespace ARDOUR
#endif /* __ardour_audioengine_h__ */
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