2 * Copyright (C) 2014 Robin Gareus <robin@gareus.org>
3 * Copyright (C) 2013 Paul Davis
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 #ifndef __libbackend_alsa_audiobackend_h__
21 #define __libbackend_alsa_audiobackend_h__
31 #include <boost/shared_ptr.hpp>
33 #include "pbd/natsort.h"
34 #include "ardour/audio_backend.h"
35 #include "ardour/dsp_load_calculator.h"
36 #include "ardour/system_exec.h"
37 #include "ardour/types.h"
39 #include "ardouralsautil/deviceinfo.h"
41 #include "zita-alsa-pcmi.h"
42 #include "alsa_rawmidi.h"
43 #include "alsa_sequencer.h"
44 #include "alsa_slave.h"
48 class AlsaAudioBackend;
52 AlsaMidiEvent (const pframes_t timestamp, const uint8_t* data, size_t size);
53 AlsaMidiEvent (const AlsaMidiEvent& other);
54 size_t size () const { return _size; };
55 pframes_t timestamp () const { return _timestamp; };
56 const uint8_t* data () const { return _data; };
57 bool operator< (const AlsaMidiEvent &other) const { return timestamp () < other.timestamp (); };
61 uint8_t _data[MaxAlsaMidiEventSize];
64 typedef std::vector<AlsaMidiEvent> AlsaMidiBuffer;
68 AlsaPort (AlsaAudioBackend &b, const std::string&, PortFlags);
72 const std::string& name () const { return _name; }
73 const std::string& pretty_name () const { return _pretty_name; }
74 PortFlags flags () const { return _flags; }
76 int set_name (const std::string &name) { _name = name; return 0; }
77 int set_pretty_name (const std::string &name) { _pretty_name = name; return 0; }
79 virtual DataType type () const = 0;
81 bool is_input () const { return flags () & IsInput; }
82 bool is_output () const { return flags () & IsOutput; }
83 bool is_physical () const { return flags () & IsPhysical; }
84 bool is_terminal () const { return flags () & IsTerminal; }
85 bool is_connected () const { return _connections.size () != 0; }
86 bool is_connected (const AlsaPort *port) const;
87 bool is_physically_connected () const;
89 const std::set<AlsaPort *>& get_connections () const { return _connections; }
91 int connect (AlsaPort *port);
92 int disconnect (AlsaPort *port);
93 void disconnect_all ();
95 virtual void* get_buffer (pframes_t nframes) = 0;
97 const LatencyRange latency_range (bool for_playback) const
99 return for_playback ? _playback_latency_range : _capture_latency_range;
102 void set_latency_range (const LatencyRange &latency_range, bool for_playback)
106 _playback_latency_range = latency_range;
110 _capture_latency_range = latency_range;
115 AlsaAudioBackend &_alsa_backend;
117 std::string _pretty_name;
118 const PortFlags _flags;
119 LatencyRange _capture_latency_range;
120 LatencyRange _playback_latency_range;
121 std::set<AlsaPort*> _connections;
123 void _connect (AlsaPort* , bool);
124 void _disconnect (AlsaPort* , bool);
128 class AlsaAudioPort : public AlsaPort {
130 AlsaAudioPort (AlsaAudioBackend &b, const std::string&, PortFlags);
133 DataType type () const { return DataType::AUDIO; };
135 Sample* buffer () { return _buffer; }
136 const Sample* const_buffer () const { return _buffer; }
137 void* get_buffer (pframes_t nframes);
140 Sample _buffer[8192];
141 }; // class AlsaAudioPort
143 class AlsaMidiPort : public AlsaPort {
145 AlsaMidiPort (AlsaAudioBackend &b, const std::string&, PortFlags);
148 DataType type () const { return DataType::MIDI; };
150 void* get_buffer (pframes_t nframes);
151 const AlsaMidiBuffer * const_buffer () const { return & _buffer[_bufperiod]; }
153 void next_period() { if (_n_periods > 1) { get_buffer(0); _bufperiod = (_bufperiod + 1) % _n_periods; } }
154 void set_n_periods(int n) { if (n > 0 && n < 4) { _n_periods = n; } }
157 AlsaMidiBuffer _buffer[3];
160 }; // class AlsaMidiPort
162 class AlsaDeviceReservation
165 AlsaDeviceReservation ();
166 AlsaDeviceReservation (const char* device_name);
167 ~AlsaDeviceReservation ();
169 bool acquire_device (const char* device_name);
170 void release_device ();
173 ARDOUR::SystemExec* _device_reservation;
174 PBD::ScopedConnectionList _reservation_connection;
175 void reservation_stdout (std::string, size_t);
176 bool _reservation_succeeded;
179 class AlsaAudioBackend : public AudioBackend {
180 friend class AlsaPort;
182 AlsaAudioBackend (AudioEngine& e, AudioBackendInfo& info);
183 ~AlsaAudioBackend ();
185 /* AUDIOBACKEND API */
187 std::string name () const;
188 bool is_realtime () const;
190 bool use_separate_input_and_output_devices () const { return true; }
191 bool match_input_output_devices_or_none () const { return true; }
192 bool can_set_period_size () const { return true; }
194 std::vector<DeviceStatus> enumerate_devices () const;
195 std::vector<DeviceStatus> enumerate_input_devices () const;
196 std::vector<DeviceStatus> enumerate_output_devices () const;
197 std::vector<float> available_sample_rates (const std::string& device) const;
198 std::vector<float> available_sample_rates2 (const std::string&, const std::string&) const;
199 std::vector<uint32_t> available_buffer_sizes (const std::string& device) const;
200 std::vector<uint32_t> available_buffer_sizes2 (const std::string&, const std::string&) const;
201 std::vector<uint32_t> available_period_sizes (const std::string& driver) const;
202 uint32_t available_input_channel_count (const std::string& device) const;
203 uint32_t available_output_channel_count (const std::string& device) const;
205 bool can_change_sample_rate_when_running () const;
206 bool can_change_buffer_size_when_running () const;
208 bool can_change_systemic_latency_when_running () const { return true; }
210 int set_device_name (const std::string&);
211 int set_input_device_name (const std::string&);
212 int set_output_device_name (const std::string&);
213 int set_sample_rate (float);
214 int set_buffer_size (uint32_t);
215 int set_peridod_size (uint32_t);
216 int set_interleaved (bool yn);
217 int set_input_channels (uint32_t);
218 int set_output_channels (uint32_t);
219 int set_systemic_input_latency (uint32_t);
220 int set_systemic_output_latency (uint32_t);
221 int set_systemic_midi_input_latency (std::string const, uint32_t);
222 int set_systemic_midi_output_latency (std::string const, uint32_t);
224 int reset_device () { return 0; };
226 /* Retrieving parameters */
227 std::string device_name () const;
228 std::string input_device_name () const;
229 std::string output_device_name () const;
230 float sample_rate () const;
231 uint32_t buffer_size () const;
232 uint32_t period_size () const;
233 bool interleaved () const;
234 uint32_t input_channels () const;
235 uint32_t output_channels () const;
236 uint32_t systemic_input_latency () const;
237 uint32_t systemic_output_latency () const;
238 uint32_t systemic_midi_input_latency (std::string const) const;
239 uint32_t systemic_midi_output_latency (std::string const) const;
241 bool can_set_systemic_midi_latencies () const { return true; }
243 /* External control app */
244 std::string control_app_name () const { return std::string (); }
245 void launch_control_app () {}
248 std::vector<std::string> enumerate_midi_options () const;
249 int set_midi_option (const std::string&);
250 std::string midi_option () const;
252 std::vector<DeviceStatus> enumerate_midi_devices () const;
253 int set_midi_device_enabled (std::string const, bool);
254 bool midi_device_enabled (std::string const) const;
258 int _start (bool for_latency_measurement);
261 int freewheel (bool);
262 float dsp_load () const;
263 size_t raw_buffer_size (DataType t);
266 framepos_t sample_time ();
267 framepos_t sample_time_at_cycle_start ();
268 pframes_t samples_since_cycle_start ();
270 int create_process_thread (boost::function<void()> func);
271 int join_process_threads ();
272 bool in_process_thread ();
273 uint32_t process_thread_count ();
275 void update_latencies ();
279 void* private_handle () const;
280 const std::string& my_name () const;
281 bool available () const;
282 uint32_t port_name_size () const;
284 int set_port_name (PortHandle, const std::string&);
285 std::string get_port_name (PortHandle) const;
286 PortHandle get_port_by_name (const std::string&) const;
288 int get_port_property (PortHandle, const std::string& key, std::string& value, std::string& type) const;
289 int set_port_property (PortHandle, const std::string& key, const std::string& value, const std::string& type);
291 int get_ports (const std::string& port_name_pattern, DataType type, PortFlags flags, std::vector<std::string>&) const;
293 DataType port_data_type (PortHandle) const;
295 PortHandle register_port (const std::string& shortname, ARDOUR::DataType, ARDOUR::PortFlags);
296 void unregister_port (PortHandle);
298 int connect (const std::string& src, const std::string& dst);
299 int disconnect (const std::string& src, const std::string& dst);
300 int connect (PortHandle, const std::string&);
301 int disconnect (PortHandle, const std::string&);
302 int disconnect_all (PortHandle);
304 bool connected (PortHandle, bool process_callback_safe);
305 bool connected_to (PortHandle, const std::string&, bool process_callback_safe);
306 bool physically_connected (PortHandle, bool process_callback_safe);
307 int get_connections (PortHandle, std::vector<std::string>&, bool process_callback_safe);
310 int midi_event_get (pframes_t& timestamp, size_t& size, uint8_t const** buf, void* port_buffer, uint32_t event_index);
311 int midi_event_put (void* port_buffer, pframes_t timestamp, const uint8_t* buffer, size_t size);
312 uint32_t get_midi_event_count (void* port_buffer);
313 void midi_clear (void* port_buffer);
317 bool can_monitor_input () const;
318 int request_input_monitoring (PortHandle, bool);
319 int ensure_input_monitoring (PortHandle, bool);
320 bool monitoring_input (PortHandle);
322 /* Latency management */
324 void set_latency_range (PortHandle, bool for_playback, LatencyRange);
325 LatencyRange get_latency_range (PortHandle, bool for_playback);
327 /* Discovering physical ports */
329 bool port_is_physical (PortHandle) const;
330 void get_physical_outputs (DataType type, std::vector<std::string>&);
331 void get_physical_inputs (DataType type, std::vector<std::string>&);
332 ChanCount n_physical_outputs () const;
333 ChanCount n_physical_inputs () const;
335 /* Getting access to the data buffer for a port */
337 void* get_buffer (PortHandle, pframes_t);
339 void* main_process_thread ();
342 std::string _instance_name;
345 bool _run; /* keep going or stop, ardour thread */
346 bool _active; /* is running, process thread */
349 bool _measure_latency;
351 uint64_t _last_process_start;
353 static std::vector<std::string> _midi_options;
354 static std::vector<AudioBackend::DeviceStatus> _input_audio_device_status;
355 static std::vector<AudioBackend::DeviceStatus> _output_audio_device_status;
356 static std::vector<AudioBackend::DeviceStatus> _duplex_audio_device_status;
357 static std::vector<AudioBackend::DeviceStatus> _midi_device_status;
358 static ARDOUR::ALSADeviceInfo _input_audio_device_info;
359 static ARDOUR::ALSADeviceInfo _output_audio_device_info;
361 mutable std::string _input_audio_device;
362 mutable std::string _output_audio_device;
363 std::string _midi_driver_option;
365 /* audio device reservation */
366 AlsaDeviceReservation _device_reservation;
370 size_t _samples_per_period;
371 size_t _periods_per_cycle;
372 static size_t _max_buffer_size;
377 uint32_t _systemic_audio_input_latency;
378 uint32_t _systemic_audio_output_latency;
381 struct AlsaMidiDeviceInfo {
383 uint32_t systemic_input_latency;
384 uint32_t systemic_output_latency;
387 , systemic_input_latency (0)
388 , systemic_output_latency (0)
392 mutable std::map<std::string, struct AlsaMidiDeviceInfo *> _midi_devices;
393 struct AlsaMidiDeviceInfo * midi_device_info(std::string const) const;
397 ARDOUR::DSPLoadCalculator _dsp_load_calc;
398 framecnt_t _processed_samples;
399 pthread_t _main_thread;
401 /* DLL, track main process callback timing */
404 /* process threads */
405 static void* alsa_process_thread (void *);
406 std::vector<pthread_t> _threads;
409 AlsaAudioBackend* engine;
410 boost::function<void ()> f;
413 ThreadData (AlsaAudioBackend* e, boost::function<void ()> fp, size_t stacksz)
414 : engine (e) , f (fp) , stacksize (stacksz) {}
418 PortHandle add_port (const std::string& shortname, ARDOUR::DataType, ARDOUR::PortFlags);
419 int register_system_audio_ports ();
420 int register_system_midi_ports (const std::string device = "");
421 void unregister_ports (bool system_only = false);
423 std::vector<AlsaPort *> _system_inputs;
424 std::vector<AlsaPort *> _system_outputs;
425 std::vector<AlsaPort *> _system_midi_in;
426 std::vector<AlsaPort *> _system_midi_out;
428 struct SortByPortName
430 bool operator ()(const AlsaPort* lhs, const AlsaPort* rhs) const
432 return PBD::naturally_less (lhs->name ().c_str (), rhs->name ().c_str ());
436 typedef std::map<std::string, AlsaPort *> PortMap; // fast lookup in _ports
437 typedef std::set<AlsaPort *, SortByPortName> PortIndex; // fast lookup in _ports
441 std::vector<AlsaMidiOut *> _rmidi_out;
442 std::vector<AlsaMidiIn *> _rmidi_in;
447 struct PortConnectData {
452 PortConnectData (const std::string& a, const std::string& b, bool c)
453 : a (a) , b (b) , c (c) {}
456 std::vector<PortConnectData *> _port_connection_queue;
457 pthread_mutex_t _port_callback_mutex;
458 bool _port_change_flag;
460 void port_connect_callback (const std::string& a, const std::string& b, bool conn) {
461 pthread_mutex_lock (&_port_callback_mutex);
462 _port_connection_queue.push_back(new PortConnectData(a, b, conn));
463 pthread_mutex_unlock (&_port_callback_mutex);
466 void port_connect_add_remove_callback () {
467 pthread_mutex_lock (&_port_callback_mutex);
468 _port_change_flag = true;
469 pthread_mutex_unlock (&_port_callback_mutex);
472 bool valid_port (PortHandle port) const {
473 return std::find (_ports.begin(), _ports.end(), static_cast<AlsaPort*>(port)) != _ports.end ();
476 AlsaPort* find_port (const std::string& port_name) const {
477 PortMap::const_iterator it = _portmap.find (port_name);
478 if (it == _portmap.end()) {
484 void update_systemic_audio_latencies ();
485 void update_systemic_midi_latencies ();
487 /* additional re-sampled I/O */
488 bool add_slave (const char* slave_device,
489 unsigned int slave_rate,
490 unsigned int slave_spp,
491 unsigned int duplex = 3);
493 class AudioSlave : public AlsaDeviceReservation, public AlsaAudioSlave {
498 unsigned int master_rate,
499 unsigned int master_samples_per_period,
500 unsigned int slave_rate,
501 unsigned int slave_samples_per_period,
502 unsigned int periods_per_cycle);
506 bool active; // set in sync with process-cb
510 std::vector<AlsaPort *> inputs;
511 std::vector<AlsaPort *> outputs;
513 PBD::Signal0<void> UpdateLatency;
514 PBD::ScopedConnection latency_connection;
517 void update_latencies (uint32_t, uint32_t);
520 PBD::ScopedConnection _halted_connection;
524 typedef std::vector<AudioSlave*> AudioSlaves;
527 }; // class AlsaAudioBackend
531 #endif /* __libbackend_alsa_audiobackend_h__ */