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"
47 class AlsaAudioBackend;
51 AlsaMidiEvent (const pframes_t timestamp, const uint8_t* data, size_t size);
52 AlsaMidiEvent (const AlsaMidiEvent& other);
54 size_t size () const { return _size; };
55 pframes_t timestamp () const { return _timestamp; };
56 const unsigned char* const_data () const { return _data; };
57 unsigned char* data () { return _data; };
58 bool operator< (const AlsaMidiEvent &other) const { return timestamp () < other.timestamp (); };
65 typedef std::vector<boost::shared_ptr<AlsaMidiEvent> > AlsaMidiBuffer;
69 AlsaPort (AlsaAudioBackend &b, const std::string&, PortFlags);
73 const std::string& name () const { return _name; }
74 const std::string& pretty_name () const { return _pretty_name; }
75 PortFlags flags () const { return _flags; }
77 int set_name (const std::string &name) { _name = name; return 0; }
78 int set_pretty_name (const std::string &name) { _pretty_name = name; return 0; }
80 virtual DataType type () const = 0;
82 bool is_input () const { return flags () & IsInput; }
83 bool is_output () const { return flags () & IsOutput; }
84 bool is_physical () const { return flags () & IsPhysical; }
85 bool is_terminal () const { return flags () & IsTerminal; }
86 bool is_connected () const { return _connections.size () != 0; }
87 bool is_connected (const AlsaPort *port) const;
88 bool is_physically_connected () const;
90 const std::set<AlsaPort *>& get_connections () const { return _connections; }
92 int connect (AlsaPort *port);
93 int disconnect (AlsaPort *port);
94 void disconnect_all ();
96 virtual void* get_buffer (pframes_t nframes) = 0;
98 const LatencyRange latency_range (bool for_playback) const
100 return for_playback ? _playback_latency_range : _capture_latency_range;
103 void set_latency_range (const LatencyRange &latency_range, bool for_playback)
107 _playback_latency_range = latency_range;
111 _capture_latency_range = latency_range;
116 AlsaAudioBackend &_alsa_backend;
118 std::string _pretty_name;
119 const PortFlags _flags;
120 LatencyRange _capture_latency_range;
121 LatencyRange _playback_latency_range;
122 std::set<AlsaPort*> _connections;
124 void _connect (AlsaPort* , bool);
125 void _disconnect (AlsaPort* , bool);
129 class AlsaAudioPort : public AlsaPort {
131 AlsaAudioPort (AlsaAudioBackend &b, const std::string&, PortFlags);
134 DataType type () const { return DataType::AUDIO; };
136 Sample* buffer () { return _buffer; }
137 const Sample* const_buffer () const { return _buffer; }
138 void* get_buffer (pframes_t nframes);
141 Sample _buffer[8192];
142 }; // class AlsaAudioPort
144 class AlsaMidiPort : public AlsaPort {
146 AlsaMidiPort (AlsaAudioBackend &b, const std::string&, PortFlags);
149 DataType type () const { return DataType::MIDI; };
151 void* get_buffer (pframes_t nframes);
152 const AlsaMidiBuffer * const_buffer () const { return & _buffer[_bufperiod]; }
154 void next_period() { if (_n_periods > 1) { get_buffer(0); _bufperiod = (_bufperiod + 1) % _n_periods; } }
155 void set_n_periods(int n) { if (n > 0 && n < 4) { _n_periods = n; } }
158 AlsaMidiBuffer _buffer[3];
161 }; // class AlsaMidiPort
163 class AlsaAudioBackend : public AudioBackend {
164 friend class AlsaPort;
166 AlsaAudioBackend (AudioEngine& e, AudioBackendInfo& info);
167 ~AlsaAudioBackend ();
169 /* AUDIOBACKEND API */
171 std::string name () const;
172 bool is_realtime () const;
174 bool use_separate_input_and_output_devices () const { return true; }
175 bool can_set_period_size () const { return true; }
177 std::vector<DeviceStatus> enumerate_devices () const;
178 std::vector<DeviceStatus> enumerate_input_devices () const;
179 std::vector<DeviceStatus> enumerate_output_devices () const;
180 std::vector<float> available_sample_rates (const std::string& device) const;
181 std::vector<float> available_sample_rates2 (const std::string&, const std::string&) const;
182 std::vector<uint32_t> available_buffer_sizes (const std::string& device) const;
183 std::vector<uint32_t> available_buffer_sizes2 (const std::string&, const std::string&) const;
184 std::vector<uint32_t> available_period_sizes (const std::string& driver) const;
185 uint32_t available_input_channel_count (const std::string& device) const;
186 uint32_t available_output_channel_count (const std::string& device) const;
188 bool can_change_sample_rate_when_running () const;
189 bool can_change_buffer_size_when_running () const;
191 bool can_change_systemic_latency_when_running () const { return true; }
193 int set_device_name (const std::string&);
194 int set_input_device_name (const std::string&);
195 int set_output_device_name (const std::string&);
196 int set_sample_rate (float);
197 int set_buffer_size (uint32_t);
198 int set_peridod_size (uint32_t);
199 int set_interleaved (bool yn);
200 int set_input_channels (uint32_t);
201 int set_output_channels (uint32_t);
202 int set_systemic_input_latency (uint32_t);
203 int set_systemic_output_latency (uint32_t);
204 int set_systemic_midi_input_latency (std::string const, uint32_t);
205 int set_systemic_midi_output_latency (std::string const, uint32_t);
207 int reset_device () { return 0; };
209 /* Retrieving parameters */
210 std::string device_name () const;
211 std::string input_device_name () const;
212 std::string output_device_name () const;
213 float sample_rate () const;
214 uint32_t buffer_size () const;
215 uint32_t period_size () const;
216 bool interleaved () const;
217 uint32_t input_channels () const;
218 uint32_t output_channels () const;
219 uint32_t systemic_input_latency () const;
220 uint32_t systemic_output_latency () const;
221 uint32_t systemic_midi_input_latency (std::string const) const;
222 uint32_t systemic_midi_output_latency (std::string const) const;
224 bool can_set_systemic_midi_latencies () const { return true; }
226 /* External control app */
227 std::string control_app_name () const { return std::string (); }
228 void launch_control_app () {}
231 std::vector<std::string> enumerate_midi_options () const;
232 int set_midi_option (const std::string&);
233 std::string midi_option () const;
235 std::vector<DeviceStatus> enumerate_midi_devices () const;
236 int set_midi_device_enabled (std::string const, bool);
237 bool midi_device_enabled (std::string const) const;
241 int _start (bool for_latency_measurement);
244 int freewheel (bool);
245 float dsp_load () const;
246 size_t raw_buffer_size (DataType t);
249 framepos_t sample_time ();
250 framepos_t sample_time_at_cycle_start ();
251 pframes_t samples_since_cycle_start ();
253 int create_process_thread (boost::function<void()> func);
254 int join_process_threads ();
255 bool in_process_thread ();
256 uint32_t process_thread_count ();
258 void update_latencies ();
262 void* private_handle () const;
263 const std::string& my_name () const;
264 bool available () const;
265 uint32_t port_name_size () const;
267 int set_port_name (PortHandle, const std::string&);
268 std::string get_port_name (PortHandle) const;
269 PortHandle get_port_by_name (const std::string&) const;
271 int get_port_property (PortHandle, const std::string& key, std::string& value, std::string& type) const;
272 int set_port_property (PortHandle, const std::string& key, const std::string& value, const std::string& type);
274 int get_ports (const std::string& port_name_pattern, DataType type, PortFlags flags, std::vector<std::string>&) const;
276 DataType port_data_type (PortHandle) const;
278 PortHandle register_port (const std::string& shortname, ARDOUR::DataType, ARDOUR::PortFlags);
279 void unregister_port (PortHandle);
281 int connect (const std::string& src, const std::string& dst);
282 int disconnect (const std::string& src, const std::string& dst);
283 int connect (PortHandle, const std::string&);
284 int disconnect (PortHandle, const std::string&);
285 int disconnect_all (PortHandle);
287 bool connected (PortHandle, bool process_callback_safe);
288 bool connected_to (PortHandle, const std::string&, bool process_callback_safe);
289 bool physically_connected (PortHandle, bool process_callback_safe);
290 int get_connections (PortHandle, std::vector<std::string>&, bool process_callback_safe);
293 int midi_event_get (pframes_t& timestamp, size_t& size, uint8_t** buf, void* port_buffer, uint32_t event_index);
294 int midi_event_put (void* port_buffer, pframes_t timestamp, const uint8_t* buffer, size_t size);
295 uint32_t get_midi_event_count (void* port_buffer);
296 void midi_clear (void* port_buffer);
300 bool can_monitor_input () const;
301 int request_input_monitoring (PortHandle, bool);
302 int ensure_input_monitoring (PortHandle, bool);
303 bool monitoring_input (PortHandle);
305 /* Latency management */
307 void set_latency_range (PortHandle, bool for_playback, LatencyRange);
308 LatencyRange get_latency_range (PortHandle, bool for_playback);
310 /* Discovering physical ports */
312 bool port_is_physical (PortHandle) const;
313 void get_physical_outputs (DataType type, std::vector<std::string>&);
314 void get_physical_inputs (DataType type, std::vector<std::string>&);
315 ChanCount n_physical_outputs () const;
316 ChanCount n_physical_inputs () const;
318 /* Getting access to the data buffer for a port */
320 void* get_buffer (PortHandle, pframes_t);
322 void* main_process_thread ();
325 std::string _instance_name;
328 bool _run; /* keep going or stop, ardour thread */
329 bool _active; /* is running, process thread */
332 bool _measure_latency;
334 uint64_t _last_process_start;
336 static std::vector<std::string> _midi_options;
337 static std::vector<AudioBackend::DeviceStatus> _input_audio_device_status;
338 static std::vector<AudioBackend::DeviceStatus> _output_audio_device_status;
339 static std::vector<AudioBackend::DeviceStatus> _duplex_audio_device_status;
340 static std::vector<AudioBackend::DeviceStatus> _midi_device_status;
341 static ARDOUR::ALSADeviceInfo _input_audio_device_info;
342 static ARDOUR::ALSADeviceInfo _output_audio_device_info;
344 mutable std::string _input_audio_device;
345 mutable std::string _output_audio_device;
346 std::string _midi_driver_option;
348 /* audio device reservation */
349 ARDOUR::SystemExec *_device_reservation;
350 PBD::ScopedConnectionList _reservation_connection;
351 void reservation_stdout (std::string, size_t);
352 bool acquire_device(const char* device_name);
353 void release_device();
354 bool _reservation_succeeded;
358 size_t _samples_per_period;
359 size_t _periods_per_cycle;
360 static size_t _max_buffer_size;
365 uint32_t _systemic_audio_input_latency;
366 uint32_t _systemic_audio_output_latency;
369 struct AlsaMidiDeviceInfo {
371 uint32_t systemic_input_latency;
372 uint32_t systemic_output_latency;
375 , systemic_input_latency (0)
376 , systemic_output_latency (0)
380 mutable std::map<std::string, struct AlsaMidiDeviceInfo *> _midi_devices;
381 struct AlsaMidiDeviceInfo * midi_device_info(std::string const) const;
385 ARDOUR::DSPLoadCalculator _dsp_load_calc;
386 framecnt_t _processed_samples;
387 pthread_t _main_thread;
389 /* process threads */
390 static void* alsa_process_thread (void *);
391 std::vector<pthread_t> _threads;
394 AlsaAudioBackend* engine;
395 boost::function<void ()> f;
398 ThreadData (AlsaAudioBackend* e, boost::function<void ()> fp, size_t stacksz)
399 : engine (e) , f (fp) , stacksize (stacksz) {}
403 PortHandle add_port (const std::string& shortname, ARDOUR::DataType, ARDOUR::PortFlags);
404 int register_system_audio_ports ();
405 int register_system_midi_ports (const std::string device = "");
406 void unregister_ports (bool system_only = false);
408 std::vector<AlsaPort *> _system_inputs;
409 std::vector<AlsaPort *> _system_outputs;
410 std::vector<AlsaPort *> _system_midi_in;
411 std::vector<AlsaPort *> _system_midi_out;
413 struct SortByPortName
415 bool operator ()(const AlsaPort* lhs, const AlsaPort* rhs) const
417 return PBD::naturally_less (lhs->name ().c_str (), rhs->name ().c_str ());
421 typedef std::map<std::string, AlsaPort *> PortMap; // fast lookup in _ports
422 typedef std::set<AlsaPort *, SortByPortName> PortIndex; // fast lookup in _ports
426 std::vector<AlsaMidiOut *> _rmidi_out;
427 std::vector<AlsaMidiIn *> _rmidi_in;
432 struct PortConnectData {
437 PortConnectData (const std::string& a, const std::string& b, bool c)
438 : a (a) , b (b) , c (c) {}
441 std::vector<PortConnectData *> _port_connection_queue;
442 pthread_mutex_t _port_callback_mutex;
443 bool _port_change_flag;
445 void port_connect_callback (const std::string& a, const std::string& b, bool conn) {
446 pthread_mutex_lock (&_port_callback_mutex);
447 _port_connection_queue.push_back(new PortConnectData(a, b, conn));
448 pthread_mutex_unlock (&_port_callback_mutex);
451 void port_connect_add_remove_callback () {
452 pthread_mutex_lock (&_port_callback_mutex);
453 _port_change_flag = true;
454 pthread_mutex_unlock (&_port_callback_mutex);
457 bool valid_port (PortHandle port) const {
458 return std::find (_ports.begin(), _ports.end(), static_cast<AlsaPort*>(port)) != _ports.end ();
461 AlsaPort* find_port (const std::string& port_name) const {
462 PortMap::const_iterator it = _portmap.find (port_name);
463 if (it == _portmap.end()) {
469 void update_systemic_audio_latencies ();
470 void update_systemic_midi_latencies ();
472 }; // class AlsaAudioBackend
476 #endif /* __libbackend_alsa_audiobackend_h__ */