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);
168 void setup_generator (GeneratorType const, float const);
169 void fill_wavetable (const float* d, size_t n_samples) { assert(_wavetable != 0); memcpy(_wavetable, d, n_samples * sizeof(float)); }
170 void midi_to_wavetable (DummyMidiBuffer const * const src, size_t n_samples);
173 Sample _buffer[8192];
175 // signal generator ('fake' physical inputs)
176 void generate (const pframes_t n_samples);
177 GeneratorType _gen_type;
180 // pink-noise filters
181 float _b0, _b1, _b2, _b3, _b4, _b5, _b6;
182 // generated sinf() samples
184 uint32_t _gen_period;
185 uint32_t _gen_offset;
186 uint32_t _gen_perio2;
187 uint32_t _gen_count2;
189 // gaussian noise generator
194 }; // class DummyAudioPort
196 class DummyMidiPort : public DummyPort {
198 DummyMidiPort (DummyAudioBackend &b, const std::string&, PortFlags);
201 DataType type () const { return DataType::MIDI; };
203 void* get_buffer (pframes_t nframes);
204 const DummyMidiBuffer * const_buffer () const { return &_buffer; }
206 void setup_generator (int, float const);
207 void set_loopback (DummyMidiBuffer const * const src);
210 DummyMidiBuffer _buffer;
211 DummyMidiBuffer _loopback;
213 // midi event generator ('fake' physical inputs)
214 void midi_generate (const pframes_t n_samples);
215 float _midi_seq_spb; // samples per beat
216 int32_t _midi_seq_time;
217 uint32_t _midi_seq_pos;
218 DummyMidiData::MIDISequence const * _midi_seq_dat;
219 }; // class DummyMidiPort
221 class DummyAudioBackend : public AudioBackend {
222 friend class DummyPort;
224 DummyAudioBackend (AudioEngine& e, AudioBackendInfo& info);
225 ~DummyAudioBackend ();
227 bool is_running () const { return _running; }
229 /* AUDIOBACKEND API */
231 std::string name () const;
232 bool is_realtime () const;
234 bool requires_driver_selection() const { return true; }
235 std::string driver_name () const;
236 std::vector<std::string> enumerate_drivers () const;
237 int set_driver (const std::string&);
239 std::vector<DeviceStatus> enumerate_devices () const;
240 std::vector<float> available_sample_rates (const std::string& device) const;
241 std::vector<uint32_t> available_buffer_sizes (const std::string& device) const;
242 uint32_t available_input_channel_count (const std::string& device) const;
243 uint32_t available_output_channel_count (const std::string& device) const;
245 bool can_change_sample_rate_when_running () const;
246 bool can_change_buffer_size_when_running () const;
248 int set_device_name (const std::string&);
249 int set_sample_rate (float);
250 int set_buffer_size (uint32_t);
251 int set_interleaved (bool yn);
252 int set_input_channels (uint32_t);
253 int set_output_channels (uint32_t);
254 int set_systemic_input_latency (uint32_t);
255 int set_systemic_output_latency (uint32_t);
256 int set_systemic_midi_input_latency (std::string const, uint32_t) { return 0; }
257 int set_systemic_midi_output_latency (std::string const, uint32_t) { return 0; }
259 int reset_device () { return 0; };
261 /* Retrieving parameters */
262 std::string device_name () const;
263 float sample_rate () const;
264 uint32_t buffer_size () const;
265 bool interleaved () const;
266 uint32_t input_channels () const;
267 uint32_t output_channels () const;
268 uint32_t systemic_input_latency () const;
269 uint32_t systemic_output_latency () const;
270 uint32_t systemic_midi_input_latency (std::string const) const { return 0; }
271 uint32_t systemic_midi_output_latency (std::string const) const { return 0; }
273 /* External control app */
274 std::string control_app_name () const { return std::string (); }
275 void launch_control_app () {}
278 std::vector<std::string> enumerate_midi_options () const;
279 int set_midi_option (const std::string&);
280 std::string midi_option () const;
282 std::vector<DeviceStatus> enumerate_midi_devices () const {
283 return std::vector<AudioBackend::DeviceStatus> ();
285 int set_midi_device_enabled (std::string const, bool) {
288 bool midi_device_enabled (std::string const) const {
291 bool can_set_systemic_midi_latencies () const {
297 int _start (bool for_latency_measurement);
300 int freewheel (bool);
301 float dsp_load () const;
302 size_t raw_buffer_size (DataType t);
305 framepos_t sample_time ();
306 framepos_t sample_time_at_cycle_start ();
307 pframes_t samples_since_cycle_start ();
309 int create_process_thread (boost::function<void()> func);
310 int join_process_threads ();
311 bool in_process_thread ();
312 uint32_t process_thread_count ();
314 void update_latencies ();
318 void* private_handle () const;
319 const std::string& my_name () const;
320 bool available () const;
321 uint32_t port_name_size () const;
323 int set_port_name (PortHandle, const std::string&);
324 std::string get_port_name (PortHandle) const;
325 PortHandle get_port_by_name (const std::string&) const;
327 int get_port_property (PortHandle, const std::string& key, std::string& value, std::string& type) const;
328 int set_port_property (PortHandle, const std::string& key, const std::string& value, const std::string& type);
330 int get_ports (const std::string& port_name_pattern, DataType type, PortFlags flags, std::vector<std::string>&) const;
332 DataType port_data_type (PortHandle) const;
334 PortHandle register_port (const std::string& shortname, ARDOUR::DataType, ARDOUR::PortFlags);
335 void unregister_port (PortHandle);
337 int connect (const std::string& src, const std::string& dst);
338 int disconnect (const std::string& src, const std::string& dst);
339 int connect (PortHandle, const std::string&);
340 int disconnect (PortHandle, const std::string&);
341 int disconnect_all (PortHandle);
343 bool connected (PortHandle, bool process_callback_safe);
344 bool connected_to (PortHandle, const std::string&, bool process_callback_safe);
345 bool physically_connected (PortHandle, bool process_callback_safe);
346 int get_connections (PortHandle, std::vector<std::string>&, bool process_callback_safe);
349 int midi_event_get (pframes_t& timestamp, size_t& size, uint8_t** buf, void* port_buffer, uint32_t event_index);
350 int midi_event_put (void* port_buffer, pframes_t timestamp, const uint8_t* buffer, size_t size);
351 uint32_t get_midi_event_count (void* port_buffer);
352 void midi_clear (void* port_buffer);
356 bool can_monitor_input () const;
357 int request_input_monitoring (PortHandle, bool);
358 int ensure_input_monitoring (PortHandle, bool);
359 bool monitoring_input (PortHandle);
361 /* Latency management */
363 void set_latency_range (PortHandle, bool for_playback, LatencyRange);
364 LatencyRange get_latency_range (PortHandle, bool for_playback);
366 /* Discovering physical ports */
368 bool port_is_physical (PortHandle) const;
369 void get_physical_outputs (DataType type, std::vector<std::string>&);
370 void get_physical_inputs (DataType type, std::vector<std::string>&);
371 ChanCount n_physical_outputs () const;
372 ChanCount n_physical_inputs () const;
374 /* Getting access to the data buffer for a port */
376 void* get_buffer (PortHandle, pframes_t);
378 void* main_process_thread ();
380 static size_t max_buffer_size() {return _max_buffer_size;}
393 DriverSpeed (const std::string& n, float s) : name (n), speedup (s) {}
396 std::string _instance_name;
397 static std::vector<std::string> _midi_options;
398 static std::vector<AudioBackend::DeviceStatus> _device_status;
399 static std::vector<DummyAudioBackend::DriverSpeed> _driver_speed;
409 size_t _samples_per_period;
411 DSPLoadCalculator _dsp_load_calc;
412 static size_t _max_buffer_size;
417 uint32_t _n_midi_inputs;
418 uint32_t _n_midi_outputs;
419 MidiPortMode _midi_mode;
421 uint32_t _systemic_input_latency;
422 uint32_t _systemic_output_latency;
424 framecnt_t _processed_samples;
426 pthread_t _main_thread;
428 /* process threads */
429 static void* dummy_process_thread (void *);
430 std::vector<pthread_t> _threads;
433 DummyAudioBackend* engine;
434 boost::function<void ()> f;
437 ThreadData (DummyAudioBackend* e, boost::function<void ()> fp, size_t stacksz)
438 : engine (e) , f (fp) , stacksize (stacksz) {}
442 PortHandle add_port (const std::string& shortname, ARDOUR::DataType, ARDOUR::PortFlags);
443 int register_system_ports ();
444 void unregister_ports (bool system_only = false);
446 std::vector<DummyAudioPort *> _system_inputs;
447 std::vector<DummyAudioPort *> _system_outputs;
448 std::vector<DummyMidiPort *> _system_midi_in;
449 std::vector<DummyMidiPort *> _system_midi_out;
451 typedef std::map<std::string, DummyPort *> PortMap; // fast lookup in _ports
452 typedef std::set<DummyPort *> PortIndex; // fast lookup in _ports
456 struct PortConnectData {
461 PortConnectData (const std::string& a, const std::string& b, bool c)
462 : a (a) , b (b) , c (c) {}
465 std::vector<PortConnectData *> _port_connection_queue;
466 pthread_mutex_t _port_callback_mutex;
467 bool _port_change_flag;
469 void port_connect_callback (const std::string& a, const std::string& b, bool conn) {
470 pthread_mutex_lock (&_port_callback_mutex);
471 _port_connection_queue.push_back(new PortConnectData(a, b, conn));
472 pthread_mutex_unlock (&_port_callback_mutex);
475 void port_connect_add_remove_callback () {
476 pthread_mutex_lock (&_port_callback_mutex);
477 _port_change_flag = true;
478 pthread_mutex_unlock (&_port_callback_mutex);
481 bool valid_port (PortHandle port) const {
482 return _ports.find (static_cast<DummyPort*>(port)) != _ports.end ();
485 DummyPort* find_port (const std::string& port_name) const {
486 PortMap::const_iterator it = _portmap.find (port_name);
487 if (it == _portmap.end()) {
493 }; // class DummyAudioBackend
497 #endif /* __libbackend_dummy_audiobackend_h__ */