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 "ardour/audio_backend.h"
34 #include "ardour/dsp_load_calculator.h"
35 #include "ardour/system_exec.h"
36 #include "ardour/types.h"
38 #include "ardouralsautil/deviceinfo.h"
40 #include "zita-alsa-pcmi.h"
41 #include "alsa_rawmidi.h"
42 #include "alsa_sequencer.h"
46 class AlsaAudioBackend;
50 AlsaMidiEvent (const pframes_t timestamp, const uint8_t* data, size_t size);
51 AlsaMidiEvent (const AlsaMidiEvent& other);
53 size_t size () const { return _size; };
54 pframes_t timestamp () const { return _timestamp; };
55 const unsigned char* const_data () const { return _data; };
56 unsigned char* data () { return _data; };
57 bool operator< (const AlsaMidiEvent &other) const { return timestamp () < other.timestamp (); };
64 typedef std::vector<boost::shared_ptr<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::vector<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::vector<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 AlsaAudioBackend : public AudioBackend {
163 friend class AlsaPort;
165 AlsaAudioBackend (AudioEngine& e, AudioBackendInfo& info);
166 ~AlsaAudioBackend ();
168 /* AUDIOBACKEND API */
170 std::string name () const;
171 bool is_realtime () const;
173 bool use_separate_input_and_output_devices () const { return true; }
174 bool can_set_period_size () const { return true; }
176 std::vector<DeviceStatus> enumerate_devices () const;
177 std::vector<DeviceStatus> enumerate_input_devices () const;
178 std::vector<DeviceStatus> enumerate_output_devices () const;
179 std::vector<float> available_sample_rates (const std::string& device) const;
180 std::vector<float> available_sample_rates2 (const std::string&, const std::string&) const;
181 std::vector<uint32_t> available_buffer_sizes (const std::string& device) const;
182 std::vector<uint32_t> available_buffer_sizes2 (const std::string&, const std::string&) const;
183 std::vector<uint32_t> available_period_sizes (const std::string& driver) const;
184 uint32_t available_input_channel_count (const std::string& device) const;
185 uint32_t available_output_channel_count (const std::string& device) const;
187 bool can_change_sample_rate_when_running () const;
188 bool can_change_buffer_size_when_running () const;
190 bool can_change_systemic_latency_when_running () const { return true; }
192 int set_device_name (const std::string&);
193 int set_input_device_name (const std::string&);
194 int set_output_device_name (const std::string&);
195 int set_sample_rate (float);
196 int set_buffer_size (uint32_t);
197 int set_peridod_size (uint32_t);
198 int set_interleaved (bool yn);
199 int set_input_channels (uint32_t);
200 int set_output_channels (uint32_t);
201 int set_systemic_input_latency (uint32_t);
202 int set_systemic_output_latency (uint32_t);
203 int set_systemic_midi_input_latency (std::string const, uint32_t);
204 int set_systemic_midi_output_latency (std::string const, uint32_t);
206 int reset_device () { return 0; };
208 /* Retrieving parameters */
209 std::string device_name () const;
210 std::string input_device_name () const;
211 std::string output_device_name () const;
212 float sample_rate () const;
213 uint32_t buffer_size () const;
214 uint32_t period_size () const;
215 bool interleaved () const;
216 uint32_t input_channels () const;
217 uint32_t output_channels () const;
218 uint32_t systemic_input_latency () const;
219 uint32_t systemic_output_latency () const;
220 uint32_t systemic_midi_input_latency (std::string const) const;
221 uint32_t systemic_midi_output_latency (std::string const) const;
223 bool can_set_systemic_midi_latencies () const { return true; }
225 /* External control app */
226 std::string control_app_name () const { return std::string (); }
227 void launch_control_app () {}
230 std::vector<std::string> enumerate_midi_options () const;
231 int set_midi_option (const std::string&);
232 std::string midi_option () const;
234 std::vector<DeviceStatus> enumerate_midi_devices () const;
235 int set_midi_device_enabled (std::string const, bool);
236 bool midi_device_enabled (std::string const) const;
240 int _start (bool for_latency_measurement);
243 int freewheel (bool);
244 float dsp_load () const;
245 size_t raw_buffer_size (DataType t);
248 framepos_t sample_time ();
249 framepos_t sample_time_at_cycle_start ();
250 pframes_t samples_since_cycle_start ();
252 int create_process_thread (boost::function<void()> func);
253 int join_process_threads ();
254 bool in_process_thread ();
255 uint32_t process_thread_count ();
257 void update_latencies ();
261 void* private_handle () const;
262 const std::string& my_name () const;
263 bool available () const;
264 uint32_t port_name_size () const;
266 int set_port_name (PortHandle, const std::string&);
267 std::string get_port_name (PortHandle) const;
268 PortHandle get_port_by_name (const std::string&) const;
269 int get_port_property (PortHandle, const std::string& key, std::string& value, std::string& type) const;
271 int get_ports (const std::string& port_name_pattern, DataType type, PortFlags flags, std::vector<std::string>&) const;
273 DataType port_data_type (PortHandle) const;
275 PortHandle register_port (const std::string& shortname, ARDOUR::DataType, ARDOUR::PortFlags);
276 void unregister_port (PortHandle);
278 int connect (const std::string& src, const std::string& dst);
279 int disconnect (const std::string& src, const std::string& dst);
280 int connect (PortHandle, const std::string&);
281 int disconnect (PortHandle, const std::string&);
282 int disconnect_all (PortHandle);
284 bool connected (PortHandle, bool process_callback_safe);
285 bool connected_to (PortHandle, const std::string&, bool process_callback_safe);
286 bool physically_connected (PortHandle, bool process_callback_safe);
287 int get_connections (PortHandle, std::vector<std::string>&, bool process_callback_safe);
290 int midi_event_get (pframes_t& timestamp, size_t& size, uint8_t** buf, void* port_buffer, uint32_t event_index);
291 int midi_event_put (void* port_buffer, pframes_t timestamp, const uint8_t* buffer, size_t size);
292 uint32_t get_midi_event_count (void* port_buffer);
293 void midi_clear (void* port_buffer);
297 bool can_monitor_input () const;
298 int request_input_monitoring (PortHandle, bool);
299 int ensure_input_monitoring (PortHandle, bool);
300 bool monitoring_input (PortHandle);
302 /* Latency management */
304 void set_latency_range (PortHandle, bool for_playback, LatencyRange);
305 LatencyRange get_latency_range (PortHandle, bool for_playback);
307 /* Discovering physical ports */
309 bool port_is_physical (PortHandle) const;
310 void get_physical_outputs (DataType type, std::vector<std::string>&);
311 void get_physical_inputs (DataType type, std::vector<std::string>&);
312 ChanCount n_physical_outputs () const;
313 ChanCount n_physical_inputs () const;
315 /* Getting access to the data buffer for a port */
317 void* get_buffer (PortHandle, pframes_t);
319 void* main_process_thread ();
322 std::string _instance_name;
325 bool _run; /* keep going or stop, ardour thread */
326 bool _active; /* is running, process thread */
329 bool _measure_latency;
331 uint64_t _last_process_start;
333 static std::vector<std::string> _midi_options;
334 static std::vector<AudioBackend::DeviceStatus> _input_audio_device_status;
335 static std::vector<AudioBackend::DeviceStatus> _output_audio_device_status;
336 static std::vector<AudioBackend::DeviceStatus> _duplex_audio_device_status;
337 static std::vector<AudioBackend::DeviceStatus> _midi_device_status;
338 static ARDOUR::ALSADeviceInfo _input_audio_device_info;
339 static ARDOUR::ALSADeviceInfo _output_audio_device_info;
341 mutable std::string _input_audio_device;
342 mutable std::string _output_audio_device;
343 std::string _midi_driver_option;
345 /* audio device reservation */
346 ARDOUR::SystemExec *_device_reservation;
347 PBD::ScopedConnectionList _reservation_connection;
348 void reservation_stdout (std::string, size_t);
349 bool acquire_device(const char* device_name);
350 void release_device();
351 bool _reservation_succeeded;
355 size_t _samples_per_period;
356 size_t _periods_per_cycle;
357 static size_t _max_buffer_size;
362 uint32_t _systemic_audio_input_latency;
363 uint32_t _systemic_audio_output_latency;
366 struct AlsaMidiDeviceInfo {
368 uint32_t systemic_input_latency;
369 uint32_t systemic_output_latency;
372 , systemic_input_latency (0)
373 , systemic_output_latency (0)
377 mutable std::map<std::string, struct AlsaMidiDeviceInfo *> _midi_devices;
378 struct AlsaMidiDeviceInfo * midi_device_info(std::string const) const;
382 ARDOUR::DSPLoadCalculator _dsp_load_calc;
383 framecnt_t _processed_samples;
384 pthread_t _main_thread;
386 /* process threads */
387 static void* alsa_process_thread (void *);
388 std::vector<pthread_t> _threads;
391 AlsaAudioBackend* engine;
392 boost::function<void ()> f;
395 ThreadData (AlsaAudioBackend* e, boost::function<void ()> fp, size_t stacksz)
396 : engine (e) , f (fp) , stacksize (stacksz) {}
400 PortHandle add_port (const std::string& shortname, ARDOUR::DataType, ARDOUR::PortFlags);
401 int register_system_audio_ports ();
402 int register_system_midi_ports (const std::string device = "");
403 void unregister_ports (bool system_only = false);
405 std::vector<AlsaPort *> _ports;
406 std::vector<AlsaPort *> _system_inputs;
407 std::vector<AlsaPort *> _system_outputs;
408 std::vector<AlsaPort *> _system_midi_in;
409 std::vector<AlsaPort *> _system_midi_out;
411 std::vector<AlsaMidiOut *> _rmidi_out;
412 std::vector<AlsaMidiIn *> _rmidi_in;
417 struct PortConnectData {
422 PortConnectData (const std::string& a, const std::string& b, bool c)
423 : a (a) , b (b) , c (c) {}
426 std::vector<PortConnectData *> _port_connection_queue;
427 pthread_mutex_t _port_callback_mutex;
428 bool _port_change_flag;
430 void port_connect_callback (const std::string& a, const std::string& b, bool conn) {
431 pthread_mutex_lock (&_port_callback_mutex);
432 _port_connection_queue.push_back(new PortConnectData(a, b, conn));
433 pthread_mutex_unlock (&_port_callback_mutex);
436 void port_connect_add_remove_callback () {
437 pthread_mutex_lock (&_port_callback_mutex);
438 _port_change_flag = true;
439 pthread_mutex_unlock (&_port_callback_mutex);
442 bool valid_port (PortHandle port) const {
443 return std::find (_ports.begin (), _ports.end (), (AlsaPort*)port) != _ports.end ();
446 AlsaPort * find_port (const std::string& port_name) const {
447 for (std::vector<AlsaPort*>::const_iterator it = _ports.begin (); it != _ports.end (); ++it) {
448 if ((*it)->name () == port_name) {
455 void update_systemic_audio_latencies ();
456 void update_systemic_midi_latencies ();
458 }; // class AlsaAudioBackend
462 #endif /* __libbackend_alsa_audiobackend_h__ */