- public:
- typedef std::set<Port*> Ports;
-
- AudioEngine (std::string client_name);
- virtual ~AudioEngine ();
-
- jack_client_t* jack() const;
- bool connected() const { return _jack != 0; }
-
- bool is_realtime () const;
-
- std::string client_name() const { return jack_client_name; }
-
- int reconnect_to_jack ();
- int disconnect_from_jack();
-
- bool will_reconnect_at_halt ();
- void set_reconnect_at_halt (bool);
-
- int stop (bool forever = false);
- int start ();
- bool running() const { return _running; }
-
- Glib::Mutex& process_lock() { return _process_lock; }
-
- nframes_t frame_rate() const;
- nframes_t frames_per_cycle() const;
-
- size_t raw_buffer_size(DataType t);
-
- int usecs_per_cycle () const { return _usecs_per_cycle; }
-
- bool get_sync_offset (nframes_t& offset) const;
-
- nframes_t frames_since_cycle_start () {
- jack_client_t* _priv_jack = _jack;
- if (!_running || !_priv_jack) return 0;
- return jack_frames_since_cycle_start (_priv_jack);
- }
- nframes_t frame_time () {
- jack_client_t* _priv_jack = _jack;
- if (!_running || !_priv_jack) return 0;
- return jack_frame_time (_priv_jack);
- }
-
- nframes_t frame_time_at_cycle_start () {
- jack_client_t* _priv_jack = _jack;
- if (!_running || !_priv_jack) return 0;
- return jack_last_frame_time (_priv_jack);
- }
-
- nframes_t transport_frame () const {
- const jack_client_t* _priv_jack = _jack;
- if (!_running || !_priv_jack) return 0;
- return jack_get_current_transport_frame (_priv_jack);
- }
-
- int request_buffer_size (nframes_t);
-
- nframes_t set_monitor_check_interval (nframes_t);
- nframes_t processed_frames() const { return _processed_frames; }
-
- float get_cpu_load() {
- jack_client_t* _priv_jack = _jack;
- if (!_running || !_priv_jack) return 0;
- return jack_cpu_load (_priv_jack);
- }
-
- void set_session (Session *);
- void remove_session (); // not a replacement for SessionHandle::session_going_away()
-
- class PortRegistrationFailure : public std::exception {
- public:
- PortRegistrationFailure (const char* why = "") {
- reason = why;
- }
- virtual const char *what() const throw() { return reason; }
-
- private:
- const char* reason;
- };
-
- class NoBackendAvailable : public std::exception {
- public:
- virtual const char *what() const throw() { return "could not connect to engine backend"; }
- };
-
- Port *register_input_port (DataType, const std::string& portname);
- Port *register_output_port (DataType, const std::string& portname);
- int unregister_port (Port &);
-
- void split_cycle (nframes_t offset);
-
- int connect (const std::string& source, const std::string& destination);
- int disconnect (const std::string& source, const std::string& destination);
- int disconnect (Port &);
-
- const char ** get_ports (const std::string& port_name_pattern, const std::string& type_name_pattern, uint32_t flags);
-
- bool can_request_hardware_monitoring ();
-
- uint32_t n_physical_outputs (DataType type) const;
- uint32_t n_physical_inputs (DataType type) const;
-
- void get_physical_outputs (DataType type, std::vector<std::string>&);
- void get_physical_inputs (DataType type, std::vector<std::string>&);
-
- std::string get_nth_physical_output (DataType type, uint32_t n) {
- return get_nth_physical (type, n, JackPortIsInput);
- }
-
- std::string get_nth_physical_input (DataType type, uint32_t n) {
- return get_nth_physical (type, n, JackPortIsOutput);
- }
-
- void update_total_latencies ();
- void update_total_latency (const Port&);
-
- Port *get_port_by_name (const std::string &);
- Port *get_port_by_name_locked (const std::string &);
-
- enum TransportState {
- TransportStopped = JackTransportStopped,
- TransportRolling = JackTransportRolling,
- TransportLooping = JackTransportLooping,
- TransportStarting = JackTransportStarting
- };
-
- void transport_start ();
- void transport_stop ();
- void transport_locate (nframes_t);
- TransportState transport_state ();
-
- int reset_timebase ();
-
- /* start/stop freewheeling */
-
- int freewheel (bool onoff);
- bool freewheeling() const { return _freewheeling; }
-
- /* this signal is sent for every process() cycle while freewheeling.
-_ the regular process() call to session->process() is not made.
- */
-
- PBD::Signal1<int,nframes_t> Freewheel;
-
- PBD::Signal0<void> Xrun;
-
- /* this signal is if JACK notifies us of a graph order event */
-
- PBD::Signal0<void> GraphReordered;
-
- /* this signal is emitted if the sample rate changes */
-
- PBD::Signal1<void,nframes_t> SampleRateChanged;
-
- /* this signal is sent if JACK ever disconnects us */
-
- PBD::Signal0<void> Halted;
-
- /* these two are emitted when the engine itself is
- started and stopped
- */
-
- PBD::Signal0<void> Running;
- PBD::Signal0<void> Stopped;
-
- /* this signal is emitted if a JACK port is registered or unregistered */
-
- PBD::Signal0<void> PortRegisteredOrUnregistered;
-
- std::string make_port_name_relative (std::string);
- std::string make_port_name_non_relative (std::string);
-
- static AudioEngine* instance() { return _instance; }
- void died ();
+public:
+
+ static AudioEngine* create ();
+
+ virtual ~AudioEngine ();
+
+ int discover_backends();
+ std::vector<const AudioBackendInfo*> available_backends() const;
+ std::string current_backend_name () const;
+ int set_backend (const std::string&, const std::string& arg1, const std::string& arg2);
+
+ 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, pthread_t*, size_t stacksize);
+ 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()
+
+ 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;
+
+
+#ifdef HAVE_JACK_SESSION
+ PBD::Signal1<void,jack_session_event_t *> JackSessionEvent;
+#endif
+
+ /* 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;
+
+ /* these two are emitted as we create backends that
+ can actually be used to do stuff (e.g. register ports)
+ */
+
+ PBD::Signal0<void> BackendAvailable;
+ PBD::Signal0<void> BackendRemoved;
+
+ 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 *);