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_dummy_audiobackend_h__
21 #define __libbackend_dummy_audiobackend_h__
31 #include <boost/shared_ptr.hpp>
33 #include "ardour/types.h"
34 #include "ardour/audio_backend.h"
35 #include "ardour/dsp_load_calculator.h"
39 class DummyAudioBackend;
41 namespace DummyMidiData {
42 typedef struct _MIDISequence {
50 class DummyMidiEvent {
52 DummyMidiEvent (const pframes_t timestamp, const uint8_t* data, size_t size);
53 DummyMidiEvent (const DummyMidiEvent& other);
55 size_t size () const { return _size; };
56 pframes_t timestamp () const { return _timestamp; };
57 const unsigned char* const_data () const { return _data; };
58 unsigned char* data () { return _data; };
59 bool operator< (const DummyMidiEvent &other) const { return timestamp () < other.timestamp (); };
66 typedef std::vector<boost::shared_ptr<DummyMidiEvent> > DummyMidiBuffer;
70 DummyPort (DummyAudioBackend &b, const std::string&, PortFlags);
72 virtual ~DummyPort ();
74 const std::string& name () const { return _name; }
75 const std::string& pretty_name () const { return _pretty_name; }
76 PortFlags flags () const { return _flags; }
78 int set_name (const std::string &name) { _name = name; return 0; }
79 int set_pretty_name (const std::string &name) { _pretty_name = name; return 0; }
81 virtual DataType type () const = 0;
83 bool is_input () const { return flags () & IsInput; }
84 bool is_output () const { return flags () & IsOutput; }
85 bool is_physical () const { return flags () & IsPhysical; }
86 bool is_terminal () const { return flags () & IsTerminal; }
87 bool is_connected () const { return _connections.size () != 0; }
88 bool is_connected (const DummyPort *port) const;
89 bool is_physically_connected () const;
91 const std::set<DummyPort *>& get_connections () const { return _connections; }
93 int connect (DummyPort *port);
94 int disconnect (DummyPort *port);
95 void disconnect_all ();
97 virtual void* get_buffer (pframes_t nframes) = 0;
98 void next_period () { _gen_cycle = false; }
100 const LatencyRange latency_range (bool for_playback) const
102 return for_playback ? _playback_latency_range : _capture_latency_range;
105 void set_latency_range (const LatencyRange &latency_range, bool for_playback)
109 _playback_latency_range = latency_range;
113 _capture_latency_range = latency_range;
118 DummyAudioBackend &_dummy_backend;
120 std::string _pretty_name;
121 const PortFlags _flags;
122 LatencyRange _capture_latency_range;
123 LatencyRange _playback_latency_range;
124 std::set<DummyPort*> _connections;
126 void _connect (DummyPort* , bool);
127 void _disconnect (DummyPort* , bool);
130 // random number generator
131 void setup_random_number_generator ();
132 inline float randf ();
133 inline uint32_t randi ();
137 volatile bool _gen_cycle;
138 Glib::Threads::Mutex generator_lock;
140 }; // class DummyPort
142 class DummyAudioPort : public DummyPort {
144 DummyAudioPort (DummyAudioBackend &b, const std::string&, PortFlags);
147 DataType type () const { return DataType::AUDIO; };
149 Sample* buffer () { return _buffer; }
150 const Sample* const_buffer () const { return _buffer; }
151 void* get_buffer (pframes_t nframes);
170 void setup_generator (GeneratorType const, float const);
171 void fill_wavetable (const float* d, size_t n_samples) { assert(_wavetable != 0); memcpy(_wavetable, d, n_samples * sizeof(float)); }
172 void midi_to_wavetable (DummyMidiBuffer const * const src, size_t n_samples);
175 Sample _buffer[8192];
177 // signal generator ('fake' physical inputs)
178 void generate (const pframes_t n_samples);
179 GeneratorType _gen_type;
182 // pink-noise filters
183 float _b0, _b1, _b2, _b3, _b4, _b5, _b6;
184 // generated sinf() samples
186 uint32_t _gen_period;
187 uint32_t _gen_offset;
188 uint32_t _gen_perio2;
189 uint32_t _gen_count2;
191 // gaussian noise generator
196 }; // class DummyAudioPort
198 class DummyMidiPort : public DummyPort {
200 DummyMidiPort (DummyAudioBackend &b, const std::string&, PortFlags);
203 DataType type () const { return DataType::MIDI; };
205 void* get_buffer (pframes_t nframes);
206 const DummyMidiBuffer * const_buffer () const { return &_buffer; }
208 void setup_generator (int, float const);
209 void set_loopback (DummyMidiBuffer const * const src);
212 DummyMidiBuffer _buffer;
213 DummyMidiBuffer _loopback;
215 // midi event generator ('fake' physical inputs)
216 void midi_generate (const pframes_t n_samples);
217 float _midi_seq_spb; // samples per beat
218 int32_t _midi_seq_time;
219 uint32_t _midi_seq_pos;
220 DummyMidiData::MIDISequence const * _midi_seq_dat;
221 }; // class DummyMidiPort
223 class DummyAudioBackend : public AudioBackend {
224 friend class DummyPort;
226 DummyAudioBackend (AudioEngine& e, AudioBackendInfo& info);
227 ~DummyAudioBackend ();
229 bool is_running () const { return _running; }
231 /* AUDIOBACKEND API */
233 std::string name () const;
234 bool is_realtime () const;
236 bool requires_driver_selection() const { return true; }
237 std::string driver_name () const;
238 std::vector<std::string> enumerate_drivers () const;
239 int set_driver (const std::string&);
241 std::vector<DeviceStatus> enumerate_devices () const;
242 std::vector<float> available_sample_rates (const std::string& device) const;
243 std::vector<uint32_t> available_buffer_sizes (const std::string& device) const;
244 uint32_t available_input_channel_count (const std::string& device) const;
245 uint32_t available_output_channel_count (const std::string& device) const;
247 bool can_change_sample_rate_when_running () const;
248 bool can_change_buffer_size_when_running () const;
250 int set_device_name (const std::string&);
251 int set_sample_rate (float);
252 int set_buffer_size (uint32_t);
253 int set_interleaved (bool yn);
254 int set_input_channels (uint32_t);
255 int set_output_channels (uint32_t);
256 int set_systemic_input_latency (uint32_t);
257 int set_systemic_output_latency (uint32_t);
258 int set_systemic_midi_input_latency (std::string const, uint32_t) { return 0; }
259 int set_systemic_midi_output_latency (std::string const, uint32_t) { return 0; }
261 int reset_device () { return 0; };
263 /* Retrieving parameters */
264 std::string device_name () const;
265 float sample_rate () const;
266 uint32_t buffer_size () const;
267 bool interleaved () const;
268 uint32_t input_channels () const;
269 uint32_t output_channels () const;
270 uint32_t systemic_input_latency () const;
271 uint32_t systemic_output_latency () const;
272 uint32_t systemic_midi_input_latency (std::string const) const { return 0; }
273 uint32_t systemic_midi_output_latency (std::string const) const { return 0; }
275 /* External control app */
276 std::string control_app_name () const { return std::string (); }
277 void launch_control_app () {}
280 std::vector<std::string> enumerate_midi_options () const;
281 int set_midi_option (const std::string&);
282 std::string midi_option () const;
284 std::vector<DeviceStatus> enumerate_midi_devices () const {
285 return std::vector<AudioBackend::DeviceStatus> ();
287 int set_midi_device_enabled (std::string const, bool) {
290 bool midi_device_enabled (std::string const) const {
293 bool can_set_systemic_midi_latencies () const {
299 int _start (bool for_latency_measurement);
302 int freewheel (bool);
303 float dsp_load () const;
304 size_t raw_buffer_size (DataType t);
307 framepos_t sample_time ();
308 framepos_t sample_time_at_cycle_start ();
309 pframes_t samples_since_cycle_start ();
311 int create_process_thread (boost::function<void()> func);
312 int join_process_threads ();
313 bool in_process_thread ();
314 uint32_t process_thread_count ();
316 void update_latencies ();
320 void* private_handle () const;
321 const std::string& my_name () const;
322 bool available () const;
323 uint32_t port_name_size () const;
325 int set_port_name (PortHandle, const std::string&);
326 std::string get_port_name (PortHandle) const;
327 PortHandle get_port_by_name (const std::string&) const;
329 int get_port_property (PortHandle, const std::string& key, std::string& value, std::string& type) const;
330 int set_port_property (PortHandle, const std::string& key, const std::string& value, const std::string& type);
332 int get_ports (const std::string& port_name_pattern, DataType type, PortFlags flags, std::vector<std::string>&) const;
334 DataType port_data_type (PortHandle) const;
336 PortHandle register_port (const std::string& shortname, ARDOUR::DataType, ARDOUR::PortFlags);
337 void unregister_port (PortHandle);
339 int connect (const std::string& src, const std::string& dst);
340 int disconnect (const std::string& src, const std::string& dst);
341 int connect (PortHandle, const std::string&);
342 int disconnect (PortHandle, const std::string&);
343 int disconnect_all (PortHandle);
345 bool connected (PortHandle, bool process_callback_safe);
346 bool connected_to (PortHandle, const std::string&, bool process_callback_safe);
347 bool physically_connected (PortHandle, bool process_callback_safe);
348 int get_connections (PortHandle, std::vector<std::string>&, bool process_callback_safe);
351 int midi_event_get (pframes_t& timestamp, size_t& size, uint8_t** buf, void* port_buffer, uint32_t event_index);
352 int midi_event_put (void* port_buffer, pframes_t timestamp, const uint8_t* buffer, size_t size);
353 uint32_t get_midi_event_count (void* port_buffer);
354 void midi_clear (void* port_buffer);
358 bool can_monitor_input () const;
359 int request_input_monitoring (PortHandle, bool);
360 int ensure_input_monitoring (PortHandle, bool);
361 bool monitoring_input (PortHandle);
363 /* Latency management */
365 void set_latency_range (PortHandle, bool for_playback, LatencyRange);
366 LatencyRange get_latency_range (PortHandle, bool for_playback);
368 /* Discovering physical ports */
370 bool port_is_physical (PortHandle) const;
371 void get_physical_outputs (DataType type, std::vector<std::string>&);
372 void get_physical_inputs (DataType type, std::vector<std::string>&);
373 ChanCount n_physical_outputs () const;
374 ChanCount n_physical_inputs () const;
376 /* Getting access to the data buffer for a port */
378 void* get_buffer (PortHandle, pframes_t);
380 void* main_process_thread ();
382 static size_t max_buffer_size() {return _max_buffer_size;}
395 DriverSpeed (const std::string& n, float s) : name (n), speedup (s) {}
398 std::string _instance_name;
399 static std::vector<std::string> _midi_options;
400 static std::vector<AudioBackend::DeviceStatus> _device_status;
401 static std::vector<DummyAudioBackend::DriverSpeed> _driver_speed;
411 size_t _samples_per_period;
413 DSPLoadCalculator _dsp_load_calc;
414 static size_t _max_buffer_size;
419 uint32_t _n_midi_inputs;
420 uint32_t _n_midi_outputs;
421 MidiPortMode _midi_mode;
423 uint32_t _systemic_input_latency;
424 uint32_t _systemic_output_latency;
426 framecnt_t _processed_samples;
428 pthread_t _main_thread;
430 /* process threads */
431 static void* dummy_process_thread (void *);
432 std::vector<pthread_t> _threads;
435 DummyAudioBackend* engine;
436 boost::function<void ()> f;
439 ThreadData (DummyAudioBackend* e, boost::function<void ()> fp, size_t stacksz)
440 : engine (e) , f (fp) , stacksize (stacksz) {}
444 PortHandle add_port (const std::string& shortname, ARDOUR::DataType, ARDOUR::PortFlags);
445 int register_system_ports ();
446 void unregister_ports (bool system_only = false);
448 std::vector<DummyAudioPort *> _system_inputs;
449 std::vector<DummyAudioPort *> _system_outputs;
450 std::vector<DummyMidiPort *> _system_midi_in;
451 std::vector<DummyMidiPort *> _system_midi_out;
453 typedef std::map<std::string, DummyPort *> PortMap; // fast lookup in _ports
454 typedef std::set<DummyPort *> PortIndex; // fast lookup in _ports
458 struct PortConnectData {
463 PortConnectData (const std::string& a, const std::string& b, bool c)
464 : a (a) , b (b) , c (c) {}
467 std::vector<PortConnectData *> _port_connection_queue;
468 pthread_mutex_t _port_callback_mutex;
469 bool _port_change_flag;
471 void port_connect_callback (const std::string& a, const std::string& b, bool conn) {
472 pthread_mutex_lock (&_port_callback_mutex);
473 _port_connection_queue.push_back(new PortConnectData(a, b, conn));
474 pthread_mutex_unlock (&_port_callback_mutex);
477 void port_connect_add_remove_callback () {
478 pthread_mutex_lock (&_port_callback_mutex);
479 _port_change_flag = true;
480 pthread_mutex_unlock (&_port_callback_mutex);
483 bool valid_port (PortHandle port) const {
484 return _ports.find (static_cast<DummyPort*>(port)) != _ports.end ();
487 DummyPort* find_port (const std::string& port_name) const {
488 PortMap::const_iterator it = _portmap.find (port_name);
489 if (it == _portmap.end()) {
495 }; // class DummyAudioBackend
499 #endif /* __libbackend_dummy_audiobackend_h__ */