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"
38 class DummyAudioBackend;
40 namespace DummyMidiData {
41 typedef struct _MIDISequence {
48 class DummyMidiEvent {
50 DummyMidiEvent (const pframes_t timestamp, const uint8_t* data, size_t size);
51 DummyMidiEvent (const DummyMidiEvent& 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 DummyMidiEvent &other) const { return timestamp () < other.timestamp (); };
64 typedef std::vector<boost::shared_ptr<DummyMidiEvent> > DummyMidiBuffer;
68 DummyPort (DummyAudioBackend &b, const std::string&, PortFlags);
70 virtual ~DummyPort ();
72 const std::string& name () const { return _name; }
73 PortFlags flags () const { return _flags; }
75 int set_name (const std::string &name) { _name = name; return 0; }
77 virtual DataType type () const = 0;
79 bool is_input () const { return flags () & IsInput; }
80 bool is_output () const { return flags () & IsOutput; }
81 bool is_physical () const { return flags () & IsPhysical; }
82 bool is_terminal () const { return flags () & IsTerminal; }
83 bool is_connected () const { return _connections.size () != 0; }
84 bool is_connected (const DummyPort *port) const;
85 bool is_physically_connected () const;
87 const std::vector<DummyPort *>& get_connections () const { return _connections; }
89 int connect (DummyPort *port);
90 int disconnect (DummyPort *port);
91 void disconnect_all ();
93 virtual void* get_buffer (pframes_t nframes) = 0;
94 void next_period () { _gen_cycle = false; }
96 const LatencyRange latency_range (bool for_playback) const
98 return for_playback ? _playback_latency_range : _capture_latency_range;
101 void set_latency_range (const LatencyRange &latency_range, bool for_playback)
105 _playback_latency_range = latency_range;
109 _capture_latency_range = latency_range;
114 DummyAudioBackend &_dummy_backend;
116 const PortFlags _flags;
117 LatencyRange _capture_latency_range;
118 LatencyRange _playback_latency_range;
119 std::vector<DummyPort*> _connections;
121 void _connect (DummyPort* , bool);
122 void _disconnect (DummyPort* , bool);
125 // random number generator
126 void setup_random_number_generator ();
127 inline float randf ();
128 inline uint32_t randi ();
132 volatile bool _gen_cycle;
133 Glib::Threads::Mutex generator_lock;
135 }; // class DummyPort
137 class DummyAudioPort : public DummyPort {
139 DummyAudioPort (DummyAudioBackend &b, const std::string&, PortFlags);
142 DataType type () const { return DataType::AUDIO; };
144 Sample* buffer () { return _buffer; }
145 const Sample* const_buffer () const { return _buffer; }
146 void* get_buffer (pframes_t nframes);
163 void setup_generator (GeneratorType const, float const);
164 void fill_wavetable (const float* d, size_t n_samples) { assert(_wavetable != 0); memcpy(_wavetable, d, n_samples * sizeof(float)); }
165 void midi_to_wavetable (DummyMidiBuffer const * const src, size_t n_samples);
168 Sample _buffer[8192];
170 // signal generator ('fake' physical inputs)
171 void generate (const pframes_t n_samples);
172 GeneratorType _gen_type;
175 // pink-noise filters
176 float _b0, _b1, _b2, _b3, _b4, _b5, _b6;
177 // generated sinf() samples
179 uint32_t _gen_period;
180 uint32_t _gen_offset;
181 uint32_t _gen_perio2;
182 uint32_t _gen_count2;
184 // gaussian noise generator
189 }; // class DummyAudioPort
191 class DummyMidiPort : public DummyPort {
193 DummyMidiPort (DummyAudioBackend &b, const std::string&, PortFlags);
196 DataType type () const { return DataType::MIDI; };
198 void* get_buffer (pframes_t nframes);
199 const DummyMidiBuffer * const_buffer () const { return &_buffer; }
201 void setup_generator (int, float const);
202 void set_loopback (DummyMidiBuffer const * const src);
205 DummyMidiBuffer _buffer;
206 DummyMidiBuffer _loopback;
208 // midi event generator ('fake' physical inputs)
209 void midi_generate (const pframes_t n_samples);
210 float _midi_seq_spb; // samples per beat
211 int32_t _midi_seq_time;
212 uint32_t _midi_seq_pos;
213 DummyMidiData::MIDISequence const * _midi_seq_dat;
214 }; // class DummyMidiPort
216 class DummyAudioBackend : public AudioBackend {
217 friend class DummyPort;
219 DummyAudioBackend (AudioEngine& e, AudioBackendInfo& info);
220 ~DummyAudioBackend ();
222 bool is_running () const { return _running; }
224 /* AUDIOBACKEND API */
226 std::string name () const;
227 bool is_realtime () const;
229 std::vector<DeviceStatus> enumerate_devices () const;
230 std::vector<float> available_sample_rates (const std::string& device) const;
231 std::vector<uint32_t> available_buffer_sizes (const std::string& device) const;
232 uint32_t available_input_channel_count (const std::string& device) const;
233 uint32_t available_output_channel_count (const std::string& device) const;
235 bool can_change_sample_rate_when_running () const;
236 bool can_change_buffer_size_when_running () const;
238 int set_device_name (const std::string&);
239 int set_sample_rate (float);
240 int set_buffer_size (uint32_t);
241 int set_interleaved (bool yn);
242 int set_input_channels (uint32_t);
243 int set_output_channels (uint32_t);
244 int set_systemic_input_latency (uint32_t);
245 int set_systemic_output_latency (uint32_t);
246 int set_systemic_midi_input_latency (std::string const, uint32_t) { return 0; }
247 int set_systemic_midi_output_latency (std::string const, uint32_t) { return 0; }
249 int reset_device () { return 0; };
251 /* Retrieving parameters */
252 std::string device_name () const;
253 float sample_rate () const;
254 uint32_t buffer_size () const;
255 bool interleaved () const;
256 uint32_t input_channels () const;
257 uint32_t output_channels () const;
258 uint32_t systemic_input_latency () const;
259 uint32_t systemic_output_latency () const;
260 uint32_t systemic_midi_input_latency (std::string const) const { return 0; }
261 uint32_t systemic_midi_output_latency (std::string const) const { return 0; }
263 /* External control app */
264 std::string control_app_name () const { return std::string (); }
265 void launch_control_app () {}
268 std::vector<std::string> enumerate_midi_options () const;
269 int set_midi_option (const std::string&);
270 std::string midi_option () const;
272 std::vector<DeviceStatus> enumerate_midi_devices () const {
273 return std::vector<AudioBackend::DeviceStatus> ();
275 int set_midi_device_enabled (std::string const, bool) {
278 bool midi_device_enabled (std::string const) const {
281 bool can_set_systemic_midi_latencies () const {
287 int _start (bool for_latency_measurement);
290 int freewheel (bool);
291 float dsp_load () const;
292 size_t raw_buffer_size (DataType t);
295 framepos_t sample_time ();
296 framepos_t sample_time_at_cycle_start ();
297 pframes_t samples_since_cycle_start ();
299 int create_process_thread (boost::function<void()> func);
300 int join_process_threads ();
301 bool in_process_thread ();
302 uint32_t process_thread_count ();
304 void update_latencies ();
308 void* private_handle () const;
309 const std::string& my_name () const;
310 bool available () const;
311 uint32_t port_name_size () const;
313 int set_port_name (PortHandle, const std::string&);
314 std::string get_port_name (PortHandle) const;
315 PortHandle get_port_by_name (const std::string&) const;
317 int get_ports (const std::string& port_name_pattern, DataType type, PortFlags flags, std::vector<std::string>&) const;
319 DataType port_data_type (PortHandle) const;
321 PortHandle register_port (const std::string& shortname, ARDOUR::DataType, ARDOUR::PortFlags);
322 void unregister_port (PortHandle);
324 int connect (const std::string& src, const std::string& dst);
325 int disconnect (const std::string& src, const std::string& dst);
326 int connect (PortHandle, const std::string&);
327 int disconnect (PortHandle, const std::string&);
328 int disconnect_all (PortHandle);
330 bool connected (PortHandle, bool process_callback_safe);
331 bool connected_to (PortHandle, const std::string&, bool process_callback_safe);
332 bool physically_connected (PortHandle, bool process_callback_safe);
333 int get_connections (PortHandle, std::vector<std::string>&, bool process_callback_safe);
336 int midi_event_get (pframes_t& timestamp, size_t& size, uint8_t** buf, void* port_buffer, uint32_t event_index);
337 int midi_event_put (void* port_buffer, pframes_t timestamp, const uint8_t* buffer, size_t size);
338 uint32_t get_midi_event_count (void* port_buffer);
339 void midi_clear (void* port_buffer);
343 bool can_monitor_input () const;
344 int request_input_monitoring (PortHandle, bool);
345 int ensure_input_monitoring (PortHandle, bool);
346 bool monitoring_input (PortHandle);
348 /* Latency management */
350 void set_latency_range (PortHandle, bool for_playback, LatencyRange);
351 LatencyRange get_latency_range (PortHandle, bool for_playback);
353 /* Discovering physical ports */
355 bool port_is_physical (PortHandle) const;
356 void get_physical_outputs (DataType type, std::vector<std::string>&);
357 void get_physical_inputs (DataType type, std::vector<std::string>&);
358 ChanCount n_physical_outputs () const;
359 ChanCount n_physical_inputs () const;
361 /* Getting access to the data buffer for a port */
363 void* get_buffer (PortHandle, pframes_t);
365 void* main_process_thread ();
367 static size_t max_buffer_size() {return _max_buffer_size;}
377 std::string _instance_name;
378 static std::vector<std::string> _midi_options;
379 static std::vector<AudioBackend::DeviceStatus> _device_status;
388 size_t _samples_per_period;
390 static size_t _max_buffer_size;
395 uint32_t _n_midi_inputs;
396 uint32_t _n_midi_outputs;
397 MidiPortMode _midi_mode;
399 uint32_t _systemic_input_latency;
400 uint32_t _systemic_output_latency;
402 framecnt_t _processed_samples;
404 pthread_t _main_thread;
406 /* process threads */
407 static void* dummy_process_thread (void *);
408 std::vector<pthread_t> _threads;
411 DummyAudioBackend* engine;
412 boost::function<void ()> f;
415 ThreadData (DummyAudioBackend* e, boost::function<void ()> fp, size_t stacksz)
416 : engine (e) , f (fp) , stacksize (stacksz) {}
420 PortHandle add_port (const std::string& shortname, ARDOUR::DataType, ARDOUR::PortFlags);
421 int register_system_ports ();
422 void unregister_ports (bool system_only = false);
424 std::vector<DummyAudioPort *> _system_inputs;
425 std::vector<DummyAudioPort *> _system_outputs;
426 std::vector<DummyMidiPort *> _system_midi_in;
427 std::vector<DummyMidiPort *> _system_midi_out;
428 std::vector<DummyPort *> _ports;
430 struct PortConnectData {
435 PortConnectData (const std::string& a, const std::string& b, bool c)
436 : a (a) , b (b) , c (c) {}
439 std::vector<PortConnectData *> _port_connection_queue;
440 pthread_mutex_t _port_callback_mutex;
441 bool _port_change_flag;
443 void port_connect_callback (const std::string& a, const std::string& b, bool conn) {
444 pthread_mutex_lock (&_port_callback_mutex);
445 _port_connection_queue.push_back(new PortConnectData(a, b, conn));
446 pthread_mutex_unlock (&_port_callback_mutex);
449 void port_connect_add_remove_callback () {
450 pthread_mutex_lock (&_port_callback_mutex);
451 _port_change_flag = true;
452 pthread_mutex_unlock (&_port_callback_mutex);
455 bool valid_port (PortHandle port) const {
456 return std::find (_ports.begin (), _ports.end (), (DummyPort*)port) != _ports.end ();
459 DummyPort * find_port (const std::string& port_name) const {
460 for (std::vector<DummyPort*>::const_iterator it = _ports.begin (); it != _ports.end (); ++it) {
461 if ((*it)->name () == port_name) {
468 }; // class DummyAudioBackend
472 #endif /* __libbackend_dummy_audiobackend_h__ */