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 {
47 class DummyMidiEvent {
49 DummyMidiEvent (const pframes_t timestamp, const uint8_t* data, size_t size);
50 DummyMidiEvent (const DummyMidiEvent& other);
52 size_t size () const { return _size; };
53 pframes_t timestamp () const { return _timestamp; };
54 const unsigned char* const_data () const { return _data; };
55 unsigned char* data () { return _data; };
56 bool operator< (const DummyMidiEvent &other) const { return timestamp () < other.timestamp (); };
63 typedef std::vector<boost::shared_ptr<DummyMidiEvent> > DummyMidiBuffer;
67 DummyPort (DummyAudioBackend &b, const std::string&, PortFlags);
69 virtual ~DummyPort ();
71 const std::string& name () const { return _name; }
72 PortFlags flags () const { return _flags; }
74 int set_name (const std::string &name) { _name = name; return 0; }
76 virtual DataType type () const = 0;
78 bool is_input () const { return flags () & IsInput; }
79 bool is_output () const { return flags () & IsOutput; }
80 bool is_physical () const { return flags () & IsPhysical; }
81 bool is_terminal () const { return flags () & IsTerminal; }
82 bool is_connected () const { return _connections.size () != 0; }
83 bool is_connected (const DummyPort *port) const;
84 bool is_physically_connected () const;
86 const std::vector<DummyPort *>& get_connections () const { return _connections; }
88 int connect (DummyPort *port);
89 int disconnect (DummyPort *port);
90 void disconnect_all ();
92 virtual void* get_buffer (pframes_t nframes) = 0;
93 void next_period () { _gen_cycle = false; }
95 const LatencyRange& latency_range (bool for_playback) const
97 return for_playback ? _playback_latency_range : _capture_latency_range;
100 void set_latency_range (const LatencyRange &latency_range, bool for_playback)
104 _playback_latency_range = latency_range;
108 _capture_latency_range = latency_range;
113 DummyAudioBackend &_dummy_backend;
115 const PortFlags _flags;
116 LatencyRange _capture_latency_range;
117 LatencyRange _playback_latency_range;
118 std::vector<DummyPort*> _connections;
120 void _connect (DummyPort* , bool);
121 void _disconnect (DummyPort* , bool);
124 // random number generator
125 void setup_random_number_generator ();
126 inline float randf ();
127 inline uint32_t randi ();
131 volatile bool _gen_cycle;
132 Glib::Threads::Mutex generator_lock;
134 }; // class DummyPort
136 class DummyAudioPort : public DummyPort {
138 DummyAudioPort (DummyAudioBackend &b, const std::string&, PortFlags);
141 DataType type () const { return DataType::AUDIO; };
143 Sample* buffer () { return _buffer; }
144 const Sample* const_buffer () const { return _buffer; }
145 void* get_buffer (pframes_t nframes);
159 void setup_generator (GeneratorType const, float const);
162 Sample _buffer[8192];
164 // signal generator ('fake' physical inputs)
165 void generate (const pframes_t n_samples);
166 GeneratorType _gen_type;
169 // pink-noise filters
170 float _b0, _b1, _b2, _b3, _b4, _b5, _b6;
171 // generated sinf() samples
173 uint32_t _gen_period;
174 uint32_t _gen_offset;
175 uint32_t _gen_perio2;
176 uint32_t _gen_count2;
178 // gaussian noise generator
183 }; // class DummyAudioPort
185 class DummyMidiPort : public DummyPort {
187 DummyMidiPort (DummyAudioBackend &b, const std::string&, PortFlags);
190 DataType type () const { return DataType::MIDI; };
192 void* get_buffer (pframes_t nframes);
193 const DummyMidiBuffer const_buffer () const { return _buffer; }
195 void setup_generator (int, float const);
198 DummyMidiBuffer _buffer;
200 // midi event generator ('fake' physical inputs)
201 void midi_generate (const pframes_t n_samples);
202 float _midi_seq_spb; // samples per beat
203 int32_t _midi_seq_time;
204 uint32_t _midi_seq_pos;
205 DummyMidiData::MIDISequence const * _midi_seq_dat;
206 }; // class DummyMidiPort
208 class DummyAudioBackend : public AudioBackend {
209 friend class DummyPort;
211 DummyAudioBackend (AudioEngine& e, AudioBackendInfo& info);
212 ~DummyAudioBackend ();
214 /* AUDIOBACKEND API */
216 std::string name () const;
217 bool is_realtime () const;
219 std::vector<DeviceStatus> enumerate_devices () const;
220 std::vector<float> available_sample_rates (const std::string& device) const;
221 std::vector<uint32_t> available_buffer_sizes (const std::string& device) const;
222 uint32_t available_input_channel_count (const std::string& device) const;
223 uint32_t available_output_channel_count (const std::string& device) const;
225 bool can_change_sample_rate_when_running () const;
226 bool can_change_buffer_size_when_running () const;
228 int set_device_name (const std::string&);
229 int set_sample_rate (float);
230 int set_buffer_size (uint32_t);
231 int set_interleaved (bool yn);
232 int set_input_channels (uint32_t);
233 int set_output_channels (uint32_t);
234 int set_systemic_input_latency (uint32_t);
235 int set_systemic_output_latency (uint32_t);
236 int set_systemic_midi_input_latency (std::string const, uint32_t) { return 0; }
237 int set_systemic_midi_output_latency (std::string const, uint32_t) { return 0; }
239 /* Retrieving parameters */
240 std::string device_name () const;
241 float sample_rate () const;
242 uint32_t buffer_size () const;
243 bool interleaved () const;
244 uint32_t input_channels () const;
245 uint32_t output_channels () const;
246 uint32_t systemic_input_latency () const;
247 uint32_t systemic_output_latency () const;
248 uint32_t systemic_midi_input_latency (std::string const) const { return 0; }
249 uint32_t systemic_midi_output_latency (std::string const) const { return 0; }
251 /* External control app */
252 std::string control_app_name () const { return std::string (); }
253 void launch_control_app () {}
256 std::vector<std::string> enumerate_midi_options () const;
257 int set_midi_option (const std::string&);
258 std::string midi_option () const;
260 std::vector<DeviceStatus> enumerate_midi_devices () const {
261 return std::vector<AudioBackend::DeviceStatus> ();
263 int set_midi_device_enabled (std::string const, bool) {
266 bool midi_device_enabled (std::string const) const {
269 bool can_set_systemic_midi_latencies () const {
275 int _start (bool for_latency_measurement);
278 int freewheel (bool);
279 float dsp_load () const;
280 size_t raw_buffer_size (DataType t);
283 pframes_t sample_time ();
284 pframes_t sample_time_at_cycle_start ();
285 pframes_t samples_since_cycle_start ();
287 int create_process_thread (boost::function<void()> func);
288 int join_process_threads ();
289 bool in_process_thread ();
290 uint32_t process_thread_count ();
292 void update_latencies ();
296 void* private_handle () const;
297 const std::string& my_name () const;
298 bool available () const;
299 uint32_t port_name_size () const;
301 int set_port_name (PortHandle, const std::string&);
302 std::string get_port_name (PortHandle) const;
303 PortHandle get_port_by_name (const std::string&) const;
305 int get_ports (const std::string& port_name_pattern, DataType type, PortFlags flags, std::vector<std::string>&) const;
307 DataType port_data_type (PortHandle) const;
309 PortHandle register_port (const std::string& shortname, ARDOUR::DataType, ARDOUR::PortFlags);
310 void unregister_port (PortHandle);
312 int connect (const std::string& src, const std::string& dst);
313 int disconnect (const std::string& src, const std::string& dst);
314 int connect (PortHandle, const std::string&);
315 int disconnect (PortHandle, const std::string&);
316 int disconnect_all (PortHandle);
318 bool connected (PortHandle, bool process_callback_safe);
319 bool connected_to (PortHandle, const std::string&, bool process_callback_safe);
320 bool physically_connected (PortHandle, bool process_callback_safe);
321 int get_connections (PortHandle, std::vector<std::string>&, bool process_callback_safe);
324 int midi_event_get (pframes_t& timestamp, size_t& size, uint8_t** buf, void* port_buffer, uint32_t event_index);
325 int midi_event_put (void* port_buffer, pframes_t timestamp, const uint8_t* buffer, size_t size);
326 uint32_t get_midi_event_count (void* port_buffer);
327 void midi_clear (void* port_buffer);
331 bool can_monitor_input () const;
332 int request_input_monitoring (PortHandle, bool);
333 int ensure_input_monitoring (PortHandle, bool);
334 bool monitoring_input (PortHandle);
336 /* Latency management */
338 void set_latency_range (PortHandle, bool for_playback, LatencyRange);
339 LatencyRange get_latency_range (PortHandle, bool for_playback);
341 /* Discovering physical ports */
343 bool port_is_physical (PortHandle) const;
344 void get_physical_outputs (DataType type, std::vector<std::string>&);
345 void get_physical_inputs (DataType type, std::vector<std::string>&);
346 ChanCount n_physical_outputs () const;
347 ChanCount n_physical_inputs () const;
349 /* Getting access to the data buffer for a port */
351 void* get_buffer (PortHandle, pframes_t);
353 void* main_process_thread ();
356 std::string _instance_name;
357 static std::vector<std::string> _midi_options;
358 static std::vector<AudioBackend::DeviceStatus> _device_status;
366 size_t _samples_per_period;
368 static size_t _max_buffer_size;
373 uint32_t _n_midi_inputs;
374 uint32_t _n_midi_outputs;
375 bool _enable_midi_generators;
377 uint32_t _systemic_input_latency;
378 uint32_t _systemic_output_latency;
380 uint64_t _processed_samples;
382 pthread_t _main_thread;
384 /* process threads */
385 static void* dummy_process_thread (void *);
386 std::vector<pthread_t> _threads;
389 DummyAudioBackend* engine;
390 boost::function<void ()> f;
393 ThreadData (DummyAudioBackend* e, boost::function<void ()> fp, size_t stacksz)
394 : engine (e) , f (fp) , stacksize (stacksz) {}
398 PortHandle add_port (const std::string& shortname, ARDOUR::DataType, ARDOUR::PortFlags);
399 int register_system_ports ();
400 void unregister_ports (bool system_only = false);
402 std::vector<DummyAudioPort *> _system_inputs;
403 std::vector<DummyMidiPort *> _system_midi_in;
404 std::vector<DummyPort *> _ports;
406 struct PortConnectData {
411 PortConnectData (const std::string& a, const std::string& b, bool c)
412 : a (a) , b (b) , c (c) {}
415 std::vector<PortConnectData *> _port_connection_queue;
416 pthread_mutex_t _port_callback_mutex;
417 bool _port_change_flag;
419 void port_connect_callback (const std::string& a, const std::string& b, bool conn) {
420 pthread_mutex_lock (&_port_callback_mutex);
421 _port_connection_queue.push_back(new PortConnectData(a, b, conn));
422 pthread_mutex_unlock (&_port_callback_mutex);
425 void port_connect_add_remove_callback () {
426 pthread_mutex_lock (&_port_callback_mutex);
427 _port_change_flag = true;
428 pthread_mutex_unlock (&_port_callback_mutex);
431 bool valid_port (PortHandle port) const {
432 return std::find (_ports.begin (), _ports.end (), (DummyPort*)port) != _ports.end ();
435 DummyPort * find_port (const std::string& port_name) const {
436 for (std::vector<DummyPort*>::const_iterator it = _ports.begin (); it != _ports.end (); ++it) {
437 if ((*it)->name () == port_name) {
444 }; // class DummyAudioBackend
448 #endif /* __libbackend_dummy_audiobackend_h__ */