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 PortFlags flags () const { return _flags; }
77 int set_name (const std::string &name) { _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 DummyPort *port) const;
87 bool is_physically_connected () const;
89 const std::vector<DummyPort *>& get_connections () const { return _connections; }
91 int connect (DummyPort *port);
92 int disconnect (DummyPort *port);
93 void disconnect_all ();
95 virtual void* get_buffer (pframes_t nframes) = 0;
96 void next_period () { _gen_cycle = false; }
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 DummyAudioBackend &_dummy_backend;
118 const PortFlags _flags;
119 LatencyRange _capture_latency_range;
120 LatencyRange _playback_latency_range;
121 std::vector<DummyPort*> _connections;
123 void _connect (DummyPort* , bool);
124 void _disconnect (DummyPort* , bool);
127 // random number generator
128 void setup_random_number_generator ();
129 inline float randf ();
130 inline uint32_t randi ();
134 volatile bool _gen_cycle;
135 Glib::Threads::Mutex generator_lock;
137 }; // class DummyPort
139 class DummyAudioPort : public DummyPort {
141 DummyAudioPort (DummyAudioBackend &b, const std::string&, PortFlags);
144 DataType type () const { return DataType::AUDIO; };
146 Sample* buffer () { return _buffer; }
147 const Sample* const_buffer () const { return _buffer; }
148 void* get_buffer (pframes_t nframes);
165 void setup_generator (GeneratorType const, float const);
166 void fill_wavetable (const float* d, size_t n_samples) { assert(_wavetable != 0); memcpy(_wavetable, d, n_samples * sizeof(float)); }
167 void midi_to_wavetable (DummyMidiBuffer const * const src, size_t n_samples);
170 Sample _buffer[8192];
172 // signal generator ('fake' physical inputs)
173 void generate (const pframes_t n_samples);
174 GeneratorType _gen_type;
177 // pink-noise filters
178 float _b0, _b1, _b2, _b3, _b4, _b5, _b6;
179 // generated sinf() samples
181 uint32_t _gen_period;
182 uint32_t _gen_offset;
183 uint32_t _gen_perio2;
184 uint32_t _gen_count2;
186 // gaussian noise generator
191 }; // class DummyAudioPort
193 class DummyMidiPort : public DummyPort {
195 DummyMidiPort (DummyAudioBackend &b, const std::string&, PortFlags);
198 DataType type () const { return DataType::MIDI; };
200 void* get_buffer (pframes_t nframes);
201 const DummyMidiBuffer * const_buffer () const { return &_buffer; }
203 void setup_generator (int, float const);
204 void set_loopback (DummyMidiBuffer const * const src);
207 DummyMidiBuffer _buffer;
208 DummyMidiBuffer _loopback;
210 // midi event generator ('fake' physical inputs)
211 void midi_generate (const pframes_t n_samples);
212 float _midi_seq_spb; // samples per beat
213 int32_t _midi_seq_time;
214 uint32_t _midi_seq_pos;
215 DummyMidiData::MIDISequence const * _midi_seq_dat;
216 }; // class DummyMidiPort
218 class DummyAudioBackend : public AudioBackend {
219 friend class DummyPort;
221 DummyAudioBackend (AudioEngine& e, AudioBackendInfo& info);
222 ~DummyAudioBackend ();
224 bool is_running () const { return _running; }
226 /* AUDIOBACKEND API */
228 std::string name () const;
229 bool is_realtime () const;
231 bool requires_driver_selection() const { return true; }
232 std::string driver_name () const;
233 std::vector<std::string> enumerate_drivers () const;
234 int set_driver (const std::string&);
236 std::vector<DeviceStatus> enumerate_devices () const;
237 std::vector<float> available_sample_rates (const std::string& device) const;
238 std::vector<uint32_t> available_buffer_sizes (const std::string& device) const;
239 uint32_t available_input_channel_count (const std::string& device) const;
240 uint32_t available_output_channel_count (const std::string& device) const;
242 bool can_change_sample_rate_when_running () const;
243 bool can_change_buffer_size_when_running () const;
245 int set_device_name (const std::string&);
246 int set_sample_rate (float);
247 int set_buffer_size (uint32_t);
248 int set_interleaved (bool yn);
249 int set_input_channels (uint32_t);
250 int set_output_channels (uint32_t);
251 int set_systemic_input_latency (uint32_t);
252 int set_systemic_output_latency (uint32_t);
253 int set_systemic_midi_input_latency (std::string const, uint32_t) { return 0; }
254 int set_systemic_midi_output_latency (std::string const, uint32_t) { return 0; }
256 int reset_device () { return 0; };
258 /* Retrieving parameters */
259 std::string device_name () const;
260 float sample_rate () const;
261 uint32_t buffer_size () const;
262 bool interleaved () const;
263 uint32_t input_channels () const;
264 uint32_t output_channels () const;
265 uint32_t systemic_input_latency () const;
266 uint32_t systemic_output_latency () const;
267 uint32_t systemic_midi_input_latency (std::string const) const { return 0; }
268 uint32_t systemic_midi_output_latency (std::string const) const { return 0; }
270 /* External control app */
271 std::string control_app_name () const { return std::string (); }
272 void launch_control_app () {}
275 std::vector<std::string> enumerate_midi_options () const;
276 int set_midi_option (const std::string&);
277 std::string midi_option () const;
279 std::vector<DeviceStatus> enumerate_midi_devices () const {
280 return std::vector<AudioBackend::DeviceStatus> ();
282 int set_midi_device_enabled (std::string const, bool) {
285 bool midi_device_enabled (std::string const) const {
288 bool can_set_systemic_midi_latencies () const {
294 int _start (bool for_latency_measurement);
297 int freewheel (bool);
298 float dsp_load () const;
299 size_t raw_buffer_size (DataType t);
302 framepos_t sample_time ();
303 framepos_t sample_time_at_cycle_start ();
304 pframes_t samples_since_cycle_start ();
306 int create_process_thread (boost::function<void()> func);
307 int join_process_threads ();
308 bool in_process_thread ();
309 uint32_t process_thread_count ();
311 void update_latencies ();
315 void* private_handle () const;
316 const std::string& my_name () const;
317 bool available () const;
318 uint32_t port_name_size () const;
320 int set_port_name (PortHandle, const std::string&);
321 std::string get_port_name (PortHandle) const;
322 PortHandle get_port_by_name (const std::string&) const;
324 int get_ports (const std::string& port_name_pattern, DataType type, PortFlags flags, std::vector<std::string>&) const;
326 DataType port_data_type (PortHandle) const;
328 PortHandle register_port (const std::string& shortname, ARDOUR::DataType, ARDOUR::PortFlags);
329 void unregister_port (PortHandle);
331 int connect (const std::string& src, const std::string& dst);
332 int disconnect (const std::string& src, const std::string& dst);
333 int connect (PortHandle, const std::string&);
334 int disconnect (PortHandle, const std::string&);
335 int disconnect_all (PortHandle);
337 bool connected (PortHandle, bool process_callback_safe);
338 bool connected_to (PortHandle, const std::string&, bool process_callback_safe);
339 bool physically_connected (PortHandle, bool process_callback_safe);
340 int get_connections (PortHandle, std::vector<std::string>&, bool process_callback_safe);
343 int midi_event_get (pframes_t& timestamp, size_t& size, uint8_t** buf, void* port_buffer, uint32_t event_index);
344 int midi_event_put (void* port_buffer, pframes_t timestamp, const uint8_t* buffer, size_t size);
345 uint32_t get_midi_event_count (void* port_buffer);
346 void midi_clear (void* port_buffer);
350 bool can_monitor_input () const;
351 int request_input_monitoring (PortHandle, bool);
352 int ensure_input_monitoring (PortHandle, bool);
353 bool monitoring_input (PortHandle);
355 /* Latency management */
357 void set_latency_range (PortHandle, bool for_playback, LatencyRange);
358 LatencyRange get_latency_range (PortHandle, bool for_playback);
360 /* Discovering physical ports */
362 bool port_is_physical (PortHandle) const;
363 void get_physical_outputs (DataType type, std::vector<std::string>&);
364 void get_physical_inputs (DataType type, std::vector<std::string>&);
365 ChanCount n_physical_outputs () const;
366 ChanCount n_physical_inputs () const;
368 /* Getting access to the data buffer for a port */
370 void* get_buffer (PortHandle, pframes_t);
372 void* main_process_thread ();
374 static size_t max_buffer_size() {return _max_buffer_size;}
387 DriverSpeed (const std::string& n, float s) : name (n), speedup (s) {}
390 std::string _instance_name;
391 static std::vector<std::string> _midi_options;
392 static std::vector<AudioBackend::DeviceStatus> _device_status;
393 static std::vector<DummyAudioBackend::DriverSpeed> _driver_speed;
403 size_t _samples_per_period;
405 DSPLoadCalculator _dsp_load_calc;
406 static size_t _max_buffer_size;
411 uint32_t _n_midi_inputs;
412 uint32_t _n_midi_outputs;
413 MidiPortMode _midi_mode;
415 uint32_t _systemic_input_latency;
416 uint32_t _systemic_output_latency;
418 framecnt_t _processed_samples;
420 pthread_t _main_thread;
422 /* process threads */
423 static void* dummy_process_thread (void *);
424 std::vector<pthread_t> _threads;
427 DummyAudioBackend* engine;
428 boost::function<void ()> f;
431 ThreadData (DummyAudioBackend* e, boost::function<void ()> fp, size_t stacksz)
432 : engine (e) , f (fp) , stacksize (stacksz) {}
436 PortHandle add_port (const std::string& shortname, ARDOUR::DataType, ARDOUR::PortFlags);
437 int register_system_ports ();
438 void unregister_ports (bool system_only = false);
440 std::vector<DummyAudioPort *> _system_inputs;
441 std::vector<DummyAudioPort *> _system_outputs;
442 std::vector<DummyMidiPort *> _system_midi_in;
443 std::vector<DummyMidiPort *> _system_midi_out;
444 std::vector<DummyPort *> _ports;
446 struct PortConnectData {
451 PortConnectData (const std::string& a, const std::string& b, bool c)
452 : a (a) , b (b) , c (c) {}
455 std::vector<PortConnectData *> _port_connection_queue;
456 pthread_mutex_t _port_callback_mutex;
457 bool _port_change_flag;
459 void port_connect_callback (const std::string& a, const std::string& b, bool conn) {
460 pthread_mutex_lock (&_port_callback_mutex);
461 _port_connection_queue.push_back(new PortConnectData(a, b, conn));
462 pthread_mutex_unlock (&_port_callback_mutex);
465 void port_connect_add_remove_callback () {
466 pthread_mutex_lock (&_port_callback_mutex);
467 _port_change_flag = true;
468 pthread_mutex_unlock (&_port_callback_mutex);
471 bool valid_port (PortHandle port) const {
472 return std::find (_ports.begin (), _ports.end (), (DummyPort*)port) != _ports.end ();
475 DummyPort * find_port (const std::string& port_name) const {
476 for (std::vector<DummyPort*>::const_iterator it = _ports.begin (); it != _ports.end (); ++it) {
477 if ((*it)->name () == port_name) {
484 }; // class DummyAudioBackend
488 #endif /* __libbackend_dummy_audiobackend_h__ */