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);
104 void update_connected_latency (bool for_playback);
107 AlsaAudioBackend &_alsa_backend;
109 std::string _pretty_name;
110 const PortFlags _flags;
111 LatencyRange _capture_latency_range;
112 LatencyRange _playback_latency_range;
113 std::set<AlsaPort*> _connections;
115 void _connect (AlsaPort* , bool);
116 void _disconnect (AlsaPort* , bool);
120 class AlsaAudioPort : public AlsaPort {
122 AlsaAudioPort (AlsaAudioBackend &b, const std::string&, PortFlags);
125 DataType type () const { return DataType::AUDIO; };
127 Sample* buffer () { return _buffer; }
128 const Sample* const_buffer () const { return _buffer; }
129 void* get_buffer (pframes_t nframes);
132 Sample _buffer[8192];
133 }; // class AlsaAudioPort
135 class AlsaMidiPort : public AlsaPort {
137 AlsaMidiPort (AlsaAudioBackend &b, const std::string&, PortFlags);
140 DataType type () const { return DataType::MIDI; };
142 void* get_buffer (pframes_t nframes);
143 const AlsaMidiBuffer * const_buffer () const { return & _buffer[_bufperiod]; }
145 void next_period() { if (_n_periods > 1) { get_buffer(0); _bufperiod = (_bufperiod + 1) % _n_periods; } }
146 void set_n_periods(int n) { if (n > 0 && n < 4) { _n_periods = n; } }
149 AlsaMidiBuffer _buffer[3];
152 }; // class AlsaMidiPort
154 class AlsaDeviceReservation
157 AlsaDeviceReservation ();
158 AlsaDeviceReservation (const char* device_name);
159 ~AlsaDeviceReservation ();
161 bool acquire_device (const char* device_name);
162 void release_device ();
165 ARDOUR::SystemExec* _device_reservation;
166 PBD::ScopedConnectionList _reservation_connection;
167 void reservation_stdout (std::string, size_t);
168 bool _reservation_succeeded;
171 class AlsaAudioBackend : public AudioBackend {
172 friend class AlsaPort;
174 AlsaAudioBackend (AudioEngine& e, AudioBackendInfo& info);
175 ~AlsaAudioBackend ();
177 /* AUDIOBACKEND API */
179 std::string name () const;
180 bool is_realtime () const;
182 bool use_separate_input_and_output_devices () const { return true; }
183 bool match_input_output_devices_or_none () const { return true; }
184 bool can_set_period_size () const { return true; }
186 std::vector<DeviceStatus> enumerate_devices () const;
187 std::vector<DeviceStatus> enumerate_input_devices () const;
188 std::vector<DeviceStatus> enumerate_output_devices () const;
189 std::vector<float> available_sample_rates (const std::string& device) const;
190 std::vector<float> available_sample_rates2 (const std::string&, const std::string&) const;
191 std::vector<uint32_t> available_buffer_sizes (const std::string& device) const;
192 std::vector<uint32_t> available_buffer_sizes2 (const std::string&, const std::string&) const;
193 std::vector<uint32_t> available_period_sizes (const std::string& driver) const;
194 uint32_t available_input_channel_count (const std::string& device) const;
195 uint32_t available_output_channel_count (const std::string& device) const;
197 bool can_change_sample_rate_when_running () const;
198 bool can_change_buffer_size_when_running () const;
200 bool can_change_systemic_latency_when_running () const { return true; }
202 int set_device_name (const std::string&);
203 int set_input_device_name (const std::string&);
204 int set_output_device_name (const std::string&);
205 int set_sample_rate (float);
206 int set_buffer_size (uint32_t);
207 int set_peridod_size (uint32_t);
208 int set_interleaved (bool yn);
209 int set_input_channels (uint32_t);
210 int set_output_channels (uint32_t);
211 int set_systemic_input_latency (uint32_t);
212 int set_systemic_output_latency (uint32_t);
213 int set_systemic_midi_input_latency (std::string const, uint32_t);
214 int set_systemic_midi_output_latency (std::string const, uint32_t);
216 int reset_device () { return 0; };
218 /* Retrieving parameters */
219 std::string device_name () const;
220 std::string input_device_name () const;
221 std::string output_device_name () const;
222 float sample_rate () const;
223 uint32_t buffer_size () const;
224 uint32_t period_size () const;
225 bool interleaved () const;
226 uint32_t input_channels () const;
227 uint32_t output_channels () const;
228 uint32_t systemic_input_latency () const;
229 uint32_t systemic_output_latency () const;
230 uint32_t systemic_midi_input_latency (std::string const) const;
231 uint32_t systemic_midi_output_latency (std::string const) const;
233 bool can_set_systemic_midi_latencies () const { return true; }
235 /* External control app */
236 std::string control_app_name () const { return std::string (); }
237 void launch_control_app () {}
240 std::vector<std::string> enumerate_midi_options () const;
241 int set_midi_option (const std::string&);
242 std::string midi_option () const;
244 std::vector<DeviceStatus> enumerate_midi_devices () const;
245 int set_midi_device_enabled (std::string const, bool);
246 bool midi_device_enabled (std::string const) const;
250 int _start (bool for_latency_measurement);
253 int freewheel (bool);
254 float dsp_load () const;
255 size_t raw_buffer_size (DataType t);
258 samplepos_t sample_time ();
259 samplepos_t sample_time_at_cycle_start ();
260 pframes_t samples_since_cycle_start ();
262 int create_process_thread (boost::function<void()> func);
263 int join_process_threads ();
264 bool in_process_thread ();
265 uint32_t process_thread_count ();
267 void update_latencies ();
271 void* private_handle () const;
272 const std::string& my_name () const;
273 uint32_t port_name_size () const;
275 int set_port_name (PortHandle, const std::string&);
276 std::string get_port_name (PortHandle) const;
277 PortFlags get_port_flags (PortHandle) const;
278 PortHandle get_port_by_name (const std::string&) const;
280 int get_port_property (PortHandle, const std::string& key, std::string& value, std::string& type) const;
281 int set_port_property (PortHandle, const std::string& key, const std::string& value, const std::string& type);
283 int get_ports (const std::string& port_name_pattern, DataType type, PortFlags flags, std::vector<std::string>&) const;
285 DataType port_data_type (PortHandle) const;
287 PortHandle register_port (const std::string& shortname, ARDOUR::DataType, ARDOUR::PortFlags);
288 void unregister_port (PortHandle);
290 int connect (const std::string& src, const std::string& dst);
291 int disconnect (const std::string& src, const std::string& dst);
292 int connect (PortHandle, const std::string&);
293 int disconnect (PortHandle, const std::string&);
294 int disconnect_all (PortHandle);
296 bool connected (PortHandle, bool process_callback_safe);
297 bool connected_to (PortHandle, const std::string&, bool process_callback_safe);
298 bool physically_connected (PortHandle, bool process_callback_safe);
299 int get_connections (PortHandle, std::vector<std::string>&, bool process_callback_safe);
302 int midi_event_get (pframes_t& timestamp, size_t& size, uint8_t const** buf, void* port_buffer, uint32_t event_index);
303 int midi_event_put (void* port_buffer, pframes_t timestamp, const uint8_t* buffer, size_t size);
304 uint32_t get_midi_event_count (void* port_buffer);
305 void midi_clear (void* port_buffer);
309 bool can_monitor_input () const;
310 int request_input_monitoring (PortHandle, bool);
311 int ensure_input_monitoring (PortHandle, bool);
312 bool monitoring_input (PortHandle);
314 /* Latency management */
316 void set_latency_range (PortHandle, bool for_playback, LatencyRange);
317 LatencyRange get_latency_range (PortHandle, bool for_playback);
319 /* Discovering physical ports */
321 bool port_is_physical (PortHandle) const;
322 void get_physical_outputs (DataType type, std::vector<std::string>&);
323 void get_physical_inputs (DataType type, std::vector<std::string>&);
324 ChanCount n_physical_outputs () const;
325 ChanCount n_physical_inputs () const;
327 /* Getting access to the data buffer for a port */
329 void* get_buffer (PortHandle, pframes_t);
331 void* main_process_thread ();
334 std::string _instance_name;
337 bool _run; /* keep going or stop, ardour thread */
338 bool _active; /* is running, process thread */
341 bool _measure_latency;
343 uint64_t _last_process_start;
345 static std::vector<std::string> _midi_options;
346 static std::vector<AudioBackend::DeviceStatus> _input_audio_device_status;
347 static std::vector<AudioBackend::DeviceStatus> _output_audio_device_status;
348 static std::vector<AudioBackend::DeviceStatus> _duplex_audio_device_status;
349 static std::vector<AudioBackend::DeviceStatus> _midi_device_status;
350 static ARDOUR::ALSADeviceInfo _input_audio_device_info;
351 static ARDOUR::ALSADeviceInfo _output_audio_device_info;
353 mutable std::string _input_audio_device;
354 mutable std::string _output_audio_device;
355 std::string _midi_driver_option;
357 /* audio device reservation */
358 AlsaDeviceReservation _device_reservation;
362 size_t _samples_per_period;
363 size_t _periods_per_cycle;
364 static size_t _max_buffer_size;
369 uint32_t _systemic_audio_input_latency;
370 uint32_t _systemic_audio_output_latency;
373 struct AlsaMidiDeviceInfo {
375 uint32_t systemic_input_latency;
376 uint32_t systemic_output_latency;
379 , systemic_input_latency (0)
380 , systemic_output_latency (0)
384 mutable std::map<std::string, struct AlsaMidiDeviceInfo *> _midi_devices;
385 struct AlsaMidiDeviceInfo * midi_device_info(std::string const) const;
389 ARDOUR::DSPLoadCalculator _dsp_load_calc;
390 samplecnt_t _processed_samples;
391 pthread_t _main_thread;
393 /* DLL, track main process callback timing */
396 /* process threads */
397 static void* alsa_process_thread (void *);
398 std::vector<pthread_t> _threads;
401 AlsaAudioBackend* engine;
402 boost::function<void ()> f;
405 ThreadData (AlsaAudioBackend* e, boost::function<void ()> fp, size_t stacksz)
406 : engine (e) , f (fp) , stacksize (stacksz) {}
410 PortHandle add_port (const std::string& shortname, ARDOUR::DataType, ARDOUR::PortFlags);
411 int register_system_audio_ports ();
412 int register_system_midi_ports (const std::string device = "");
413 void unregister_ports (bool system_only = false);
414 void update_system_port_latecies ();
416 std::vector<AlsaPort *> _system_inputs;
417 std::vector<AlsaPort *> _system_outputs;
418 std::vector<AlsaPort *> _system_midi_in;
419 std::vector<AlsaPort *> _system_midi_out;
421 struct SortByPortName
423 bool operator ()(const AlsaPort* lhs, const AlsaPort* rhs) const
425 return PBD::naturally_less (lhs->name ().c_str (), rhs->name ().c_str ());
429 typedef std::map<std::string, AlsaPort *> PortMap; // fast lookup in _ports
430 typedef std::set<AlsaPort *, SortByPortName> PortIndex; // fast lookup in _ports
434 std::vector<AlsaMidiOut *> _rmidi_out;
435 std::vector<AlsaMidiIn *> _rmidi_in;
440 struct PortConnectData {
445 PortConnectData (const std::string& a, const std::string& b, bool c)
446 : a (a) , b (b) , c (c) {}
449 std::vector<PortConnectData *> _port_connection_queue;
450 pthread_mutex_t _port_callback_mutex;
451 bool _port_change_flag;
453 void port_connect_callback (const std::string& a, const std::string& b, bool conn) {
454 pthread_mutex_lock (&_port_callback_mutex);
455 _port_connection_queue.push_back(new PortConnectData(a, b, conn));
456 pthread_mutex_unlock (&_port_callback_mutex);
459 void port_connect_add_remove_callback () {
460 pthread_mutex_lock (&_port_callback_mutex);
461 _port_change_flag = true;
462 pthread_mutex_unlock (&_port_callback_mutex);
465 bool valid_port (PortHandle port) const {
466 return std::find (_ports.begin(), _ports.end(), static_cast<AlsaPort*>(port)) != _ports.end ();
469 AlsaPort* find_port (const std::string& port_name) const {
470 PortMap::const_iterator it = _portmap.find (port_name);
471 if (it == _portmap.end()) {
477 void update_systemic_audio_latencies ();
478 void update_systemic_midi_latencies ();
480 /* additional re-sampled I/O */
481 bool add_slave (const char* slave_device,
482 unsigned int slave_rate,
483 unsigned int slave_spp,
484 unsigned int duplex = 3);
486 class AudioSlave : public AlsaDeviceReservation, public AlsaAudioSlave {
491 unsigned int master_rate,
492 unsigned int master_samples_per_period,
493 unsigned int slave_rate,
494 unsigned int slave_samples_per_period,
495 unsigned int periods_per_cycle);
499 bool active; // set in sync with process-cb
503 std::vector<AlsaPort *> inputs;
504 std::vector<AlsaPort *> outputs;
506 PBD::Signal0<void> UpdateLatency;
507 PBD::ScopedConnection latency_connection;
510 void update_latencies (uint32_t, uint32_t);
513 PBD::ScopedConnection _halted_connection;
517 typedef std::vector<AudioSlave*> AudioSlaves;
520 }; // class AlsaAudioBackend
524 #endif /* __libbackend_alsa_audiobackend_h__ */