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__
33 #include <boost/shared_ptr.hpp>
35 #include "pbd/natsort.h"
36 #include "pbd/ringbuffer.h"
37 #include "ardour/types.h"
38 #include "ardour/audio_backend.h"
39 #include "ardour/dsp_load_calculator.h"
43 class DummyAudioBackend;
45 namespace DummyMidiData {
46 typedef struct _MIDISequence {
54 class DummyMidiEvent {
56 DummyMidiEvent (const pframes_t timestamp, const uint8_t* data, size_t size);
57 DummyMidiEvent (const DummyMidiEvent& other);
59 size_t size () const { return _size; };
60 pframes_t timestamp () const { return _timestamp; };
61 const unsigned char* const_data () const { return _data; };
62 unsigned char* data () { return _data; };
63 bool operator< (const DummyMidiEvent &other) const { return timestamp () < other.timestamp (); };
70 typedef std::vector<boost::shared_ptr<DummyMidiEvent> > DummyMidiBuffer;
74 DummyPort (DummyAudioBackend &b, const std::string&, PortFlags);
76 virtual ~DummyPort ();
78 const std::string& name () const { return _name; }
79 const std::string& pretty_name () const { return _pretty_name; }
80 PortFlags flags () const { return _flags; }
82 int set_name (const std::string &name) { _name = name; return 0; }
83 int set_pretty_name (const std::string &name) { _pretty_name = name; return 0; }
85 virtual DataType type () const = 0;
87 bool is_input () const { return flags () & IsInput; }
88 bool is_output () const { return flags () & IsOutput; }
89 bool is_physical () const { return flags () & IsPhysical; }
90 bool is_terminal () const { return flags () & IsTerminal; }
91 bool is_connected () const { return _connections.size () != 0; }
92 bool is_connected (const DummyPort *port) const;
93 bool is_physically_connected () const;
95 const std::set<DummyPort *>& get_connections () const { return _connections; }
97 int connect (DummyPort *port);
98 int disconnect (DummyPort *port);
99 void disconnect_all ();
101 virtual void* get_buffer (pframes_t nframes) = 0;
102 void next_period () { _gen_cycle = false; }
104 const LatencyRange latency_range (bool for_playback) const
106 return for_playback ? _playback_latency_range : _capture_latency_range;
109 void set_latency_range (const LatencyRange &latency_range, bool for_playback)
113 _playback_latency_range = latency_range;
117 _capture_latency_range = latency_range;
122 DummyAudioBackend &_dummy_backend;
124 std::string _pretty_name;
125 const PortFlags _flags;
126 LatencyRange _capture_latency_range;
127 LatencyRange _playback_latency_range;
128 std::set<DummyPort*> _connections;
130 void _connect (DummyPort* , bool);
131 void _disconnect (DummyPort* , bool);
134 // random number generator
135 void setup_random_number_generator ();
136 inline float randf ();
137 inline uint32_t randi ();
141 volatile bool _gen_cycle;
142 Glib::Threads::Mutex generator_lock;
144 }; // class DummyPort
146 class DummyAudioPort : public DummyPort {
148 DummyAudioPort (DummyAudioBackend &b, const std::string&, PortFlags);
151 DataType type () const { return DataType::AUDIO; };
153 Sample* buffer () { return _buffer; }
154 const Sample* const_buffer () const { return _buffer; }
155 void* get_buffer (pframes_t nframes);
176 std::string setup_generator (GeneratorType const, float const, int, int);
177 void fill_wavetable (const float* d, size_t n_samples) { assert(_wavetable != 0); memcpy(_wavetable, d, n_samples * sizeof(float)); }
178 void midi_to_wavetable (DummyMidiBuffer const * const src, size_t n_samples);
181 Sample _buffer[8192];
183 // signal generator ('fake' physical inputs)
184 void generate (const pframes_t n_samples);
185 GeneratorType _gen_type;
188 // pink-noise filters
189 float _b0, _b1, _b2, _b3, _b4, _b5, _b6;
190 // generated sinf() samples
192 uint32_t _gen_period;
193 uint32_t _gen_offset;
194 uint32_t _gen_perio2;
195 uint32_t _gen_count2;
197 // gaussian noise generator
203 PBD::RingBuffer<Sample>* _ltcbuf;
208 }; // class DummyAudioPort
210 class DummyMidiPort : public DummyPort {
212 DummyMidiPort (DummyAudioBackend &b, const std::string&, PortFlags);
215 DataType type () const { return DataType::MIDI; };
217 void* get_buffer (pframes_t nframes);
218 const DummyMidiBuffer * const_buffer () const { return &_buffer; }
220 std::string setup_generator (int, float const);
221 void set_loopback (DummyMidiBuffer const * const src);
224 DummyMidiBuffer _buffer;
225 DummyMidiBuffer _loopback;
227 // midi event generator ('fake' physical inputs)
228 void midi_generate (const pframes_t n_samples);
229 float _midi_seq_spb; // samples per beat
230 int32_t _midi_seq_time;
231 uint32_t _midi_seq_pos;
232 DummyMidiData::MIDISequence const * _midi_seq_dat;
233 }; // class DummyMidiPort
235 class DummyAudioBackend : public AudioBackend {
236 friend class DummyPort;
238 DummyAudioBackend (AudioEngine& e, AudioBackendInfo& info);
239 ~DummyAudioBackend ();
241 bool is_running () const { return _running; }
243 /* AUDIOBACKEND API */
245 std::string name () const;
246 bool is_realtime () const;
248 bool requires_driver_selection() const { return true; }
249 std::string driver_name () const;
250 std::vector<std::string> enumerate_drivers () const;
251 int set_driver (const std::string&);
253 std::vector<DeviceStatus> enumerate_devices () const;
254 std::vector<float> available_sample_rates (const std::string& device) const;
255 std::vector<uint32_t> available_buffer_sizes (const std::string& device) const;
256 uint32_t available_input_channel_count (const std::string& device) const;
257 uint32_t available_output_channel_count (const std::string& device) const;
259 bool can_change_sample_rate_when_running () const;
260 bool can_change_buffer_size_when_running () const;
262 int set_device_name (const std::string&);
263 int set_sample_rate (float);
264 int set_buffer_size (uint32_t);
265 int set_interleaved (bool yn);
266 int set_input_channels (uint32_t);
267 int set_output_channels (uint32_t);
268 int set_systemic_input_latency (uint32_t);
269 int set_systemic_output_latency (uint32_t);
270 int set_systemic_midi_input_latency (std::string const, uint32_t) { return 0; }
271 int set_systemic_midi_output_latency (std::string const, uint32_t) { return 0; }
273 int reset_device () { return 0; };
275 /* Retrieving parameters */
276 std::string device_name () const;
277 float sample_rate () const;
278 uint32_t buffer_size () const;
279 bool interleaved () const;
280 uint32_t input_channels () const;
281 uint32_t output_channels () const;
282 uint32_t systemic_input_latency () const;
283 uint32_t systemic_output_latency () const;
284 uint32_t systemic_midi_input_latency (std::string const) const { return 0; }
285 uint32_t systemic_midi_output_latency (std::string const) const { return 0; }
287 /* External control app */
288 std::string control_app_name () const { return std::string (); }
289 void launch_control_app () {}
292 std::vector<std::string> enumerate_midi_options () const;
293 int set_midi_option (const std::string&);
294 std::string midi_option () const;
296 std::vector<DeviceStatus> enumerate_midi_devices () const {
297 return std::vector<AudioBackend::DeviceStatus> ();
299 int set_midi_device_enabled (std::string const, bool) {
302 bool midi_device_enabled (std::string const) const {
305 bool can_set_systemic_midi_latencies () const {
311 int _start (bool for_latency_measurement);
314 int freewheel (bool);
315 float dsp_load () const;
316 size_t raw_buffer_size (DataType t);
319 samplepos_t sample_time ();
320 samplepos_t sample_time_at_cycle_start ();
321 pframes_t samples_since_cycle_start ();
323 int create_process_thread (boost::function<void()> func);
324 int join_process_threads ();
325 bool in_process_thread ();
326 uint32_t process_thread_count ();
328 void update_latencies ();
332 void* private_handle () const;
333 const std::string& my_name () const;
334 bool available () const;
335 uint32_t port_name_size () const;
337 int set_port_name (PortHandle, const std::string&);
338 std::string get_port_name (PortHandle) const;
339 PortHandle get_port_by_name (const std::string&) const;
341 int get_port_property (PortHandle, const std::string& key, std::string& value, std::string& type) const;
342 int set_port_property (PortHandle, const std::string& key, const std::string& value, const std::string& type);
344 int get_ports (const std::string& port_name_pattern, DataType type, PortFlags flags, std::vector<std::string>&) const;
346 DataType port_data_type (PortHandle) const;
348 PortHandle register_port (const std::string& shortname, ARDOUR::DataType, ARDOUR::PortFlags);
349 void unregister_port (PortHandle);
351 int connect (const std::string& src, const std::string& dst);
352 int disconnect (const std::string& src, const std::string& dst);
353 int connect (PortHandle, const std::string&);
354 int disconnect (PortHandle, const std::string&);
355 int disconnect_all (PortHandle);
357 bool connected (PortHandle, bool process_callback_safe);
358 bool connected_to (PortHandle, const std::string&, bool process_callback_safe);
359 bool physically_connected (PortHandle, bool process_callback_safe);
360 int get_connections (PortHandle, std::vector<std::string>&, bool process_callback_safe);
363 int midi_event_get (pframes_t& timestamp, size_t& size, uint8_t const** buf, void* port_buffer, uint32_t event_index);
364 int midi_event_put (void* port_buffer, pframes_t timestamp, const uint8_t* buffer, size_t size);
365 uint32_t get_midi_event_count (void* port_buffer);
366 void midi_clear (void* port_buffer);
370 bool can_monitor_input () const;
371 int request_input_monitoring (PortHandle, bool);
372 int ensure_input_monitoring (PortHandle, bool);
373 bool monitoring_input (PortHandle);
375 /* Latency management */
377 void set_latency_range (PortHandle, bool for_playback, LatencyRange);
378 LatencyRange get_latency_range (PortHandle, bool for_playback);
380 /* Discovering physical ports */
382 bool port_is_physical (PortHandle) const;
383 void get_physical_outputs (DataType type, std::vector<std::string>&);
384 void get_physical_inputs (DataType type, std::vector<std::string>&);
385 ChanCount n_physical_outputs () const;
386 ChanCount n_physical_inputs () const;
388 /* Getting access to the data buffer for a port */
390 void* get_buffer (PortHandle, pframes_t);
392 void* main_process_thread ();
394 static size_t max_buffer_size() {return _max_buffer_size;}
407 DriverSpeed (const std::string& n, float s) : name (n), speedup (s) {}
410 std::string _instance_name;
411 static std::vector<std::string> _midi_options;
412 static std::vector<AudioBackend::DeviceStatus> _device_status;
413 static std::vector<DummyAudioBackend::DriverSpeed> _driver_speed;
423 size_t _samples_per_period;
425 DSPLoadCalculator _dsp_load_calc;
426 static size_t _max_buffer_size;
431 uint32_t _n_midi_inputs;
432 uint32_t _n_midi_outputs;
433 MidiPortMode _midi_mode;
435 uint32_t _systemic_input_latency;
436 uint32_t _systemic_output_latency;
438 samplecnt_t _processed_samples;
440 pthread_t _main_thread;
442 /* process threads */
443 static void* dummy_process_thread (void *);
444 std::vector<pthread_t> _threads;
447 DummyAudioBackend* engine;
448 boost::function<void ()> f;
451 ThreadData (DummyAudioBackend* e, boost::function<void ()> fp, size_t stacksz)
452 : engine (e) , f (fp) , stacksize (stacksz) {}
456 PortHandle add_port (const std::string& shortname, ARDOUR::DataType, ARDOUR::PortFlags);
457 int register_system_ports ();
458 void unregister_ports (bool system_only = false);
460 std::vector<DummyAudioPort *> _system_inputs;
461 std::vector<DummyAudioPort *> _system_outputs;
462 std::vector<DummyMidiPort *> _system_midi_in;
463 std::vector<DummyMidiPort *> _system_midi_out;
465 struct SortByPortName
467 bool operator ()(const DummyPort* lhs, const DummyPort* rhs) const
469 return PBD::naturally_less (lhs->name ().c_str (), rhs->name ().c_str ());
473 typedef std::map<std::string, DummyPort *> PortMap; // fast lookup in _ports
474 typedef std::set<DummyPort *, SortByPortName> PortIndex; // fast lookup in _ports
478 struct PortConnectData {
483 PortConnectData (const std::string& a, const std::string& b, bool c)
484 : a (a) , b (b) , c (c) {}
487 std::vector<PortConnectData *> _port_connection_queue;
488 pthread_mutex_t _port_callback_mutex;
489 bool _port_change_flag;
491 void port_connect_callback (const std::string& a, const std::string& b, bool conn) {
492 pthread_mutex_lock (&_port_callback_mutex);
493 _port_connection_queue.push_back(new PortConnectData(a, b, conn));
494 pthread_mutex_unlock (&_port_callback_mutex);
497 void port_connect_add_remove_callback () {
498 pthread_mutex_lock (&_port_callback_mutex);
499 _port_change_flag = true;
500 pthread_mutex_unlock (&_port_callback_mutex);
503 bool valid_port (PortHandle port) const {
504 return std::find (_ports.begin(), _ports.end(), static_cast<DummyPort*>(port)) != _ports.end ();
507 DummyPort* find_port (const std::string& port_name) const {
508 PortMap::const_iterator it = _portmap.find (port_name);
509 if (it == _portmap.end()) {
515 }; // class DummyAudioBackend
519 #endif /* __libbackend_dummy_audiobackend_h__ */