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 DummyMidiEvent {
40 DummyMidiEvent (const pframes_t timestamp, const uint8_t* data, size_t size);
41 DummyMidiEvent (const DummyMidiEvent& other);
43 size_t size () const { return _size; };
44 pframes_t timestamp () const { return _timestamp; };
45 const unsigned char* const_data () const { return _data; };
46 unsigned char* data () { return _data; };
47 bool operator< (const DummyMidiEvent &other) const { return timestamp () < other.timestamp (); };
54 typedef std::vector<boost::shared_ptr<DummyMidiEvent> > DummyMidiBuffer;
58 DummyPort (const std::string&, PortFlags);
60 virtual ~DummyPort ();
62 const std::string& name () const { return _name; }
63 PortFlags flags () const { return _flags; }
65 int set_name (const std::string &name) { _name = name; return 0; }
67 virtual DataType type () const = 0;
69 bool is_input () const { return flags () & IsInput; }
70 bool is_output () const { return flags () & IsOutput; }
71 bool is_physical () const { return flags () & IsPhysical; }
72 bool is_terminal () const { return flags () & IsTerminal; }
73 bool is_connected () const { return _connections.size () != 0; }
74 bool is_connected (const DummyPort *port) const;
75 bool is_physically_connected () const;
77 const std::vector<DummyPort *>& get_connections () const { return _connections; }
79 int connect (DummyPort *port);
80 int disconnect (DummyPort *port);
81 void disconnect_all ();
83 virtual void* get_buffer (pframes_t nframes) = 0;
85 const LatencyRange& latency_range (bool for_playback) const
87 return for_playback ? _playback_latency_range : _capture_latency_range;
90 void set_latency_range (const LatencyRange &latency_range, bool for_playback)
94 _playback_latency_range = latency_range;
98 _capture_latency_range = latency_range;
104 const PortFlags _flags;
105 LatencyRange _capture_latency_range;
106 LatencyRange _playback_latency_range;
107 std::vector<DummyPort*> _connections;
109 void _connect (DummyPort* , bool);
110 void _disconnect (DummyPort* , bool);
112 }; // class DummyPort
114 class DummyAudioPort : public DummyPort {
116 DummyAudioPort (const std::string&, PortFlags);
119 DataType type () const { return DataType::AUDIO; };
121 Sample* buffer () { return _buffer; }
122 const Sample* const_buffer () const { return _buffer; }
123 void* get_buffer (pframes_t nframes);
126 Sample _buffer[8192];
127 }; // class DummyAudioPort
129 class DummyMidiPort : public DummyPort {
131 DummyMidiPort (const std::string&, PortFlags);
134 DataType type () const { return DataType::MIDI; };
136 void* get_buffer (pframes_t nframes);
137 const DummyMidiBuffer const_buffer () const { return _buffer; }
140 DummyMidiBuffer _buffer;
141 }; // class DummyMidiPort
143 class DummyAudioBackend : public AudioBackend {
145 DummyAudioBackend (AudioEngine& e);
146 ~DummyAudioBackend ();
148 /* AUDIOBACKEND API */
150 std::string name () const;
151 bool is_realtime () const;
153 std::vector<DeviceStatus> enumerate_devices () const;
154 std::vector<float> available_sample_rates (const std::string& device) const;
155 std::vector<uint32_t> available_buffer_sizes (const std::string& device) const;
156 uint32_t available_input_channel_count (const std::string& device) const;
157 uint32_t available_output_channel_count (const std::string& device) const;
159 bool can_change_sample_rate_when_running () const;
160 bool can_change_buffer_size_when_running () const;
162 int set_device_name (const std::string&);
163 int set_sample_rate (float);
164 int set_buffer_size (uint32_t);
165 int set_interleaved (bool yn);
166 int set_input_channels (uint32_t);
167 int set_output_channels (uint32_t);
168 int set_systemic_input_latency (uint32_t);
169 int set_systemic_output_latency (uint32_t);
171 /* Retrieving parameters */
172 std::string device_name () const;
173 float sample_rate () const;
174 uint32_t buffer_size () const;
175 bool interleaved () const;
176 uint32_t input_channels () const;
177 uint32_t output_channels () const;
178 uint32_t systemic_input_latency () const;
179 uint32_t systemic_output_latency () const;
181 /* External control app */
182 std::string control_app_name () const { return std::string (); }
183 void launch_control_app () {}
186 std::vector<std::string> enumerate_midi_options () const;
187 int set_midi_option (const std::string&);
188 std::string midi_option () const;
192 int _start (bool for_latency_measurement);
195 int freewheel (bool);
196 float dsp_load () const;
197 size_t raw_buffer_size (DataType t);
200 pframes_t sample_time ();
201 pframes_t sample_time_at_cycle_start ();
202 pframes_t samples_since_cycle_start ();
204 int create_process_thread (boost::function<void()> func);
205 int join_process_threads ();
206 bool in_process_thread ();
207 uint32_t process_thread_count ();
209 void update_latencies ();
213 void* private_handle () const;
214 const std::string& my_name () const;
215 bool available () const;
216 uint32_t port_name_size () const;
218 int set_port_name (PortHandle, const std::string&);
219 std::string get_port_name (PortHandle) const;
220 PortHandle get_port_by_name (const std::string&) const;
222 int get_ports (const std::string& port_name_pattern, DataType type, PortFlags flags, std::vector<std::string>&) const;
224 DataType port_data_type (PortHandle) const;
226 PortHandle register_port (const std::string& shortname, ARDOUR::DataType, ARDOUR::PortFlags);
227 void unregister_port (PortHandle);
229 int connect (const std::string& src, const std::string& dst);
230 int disconnect (const std::string& src, const std::string& dst);
231 int connect (PortHandle, const std::string&);
232 int disconnect (PortHandle, const std::string&);
233 int disconnect_all (PortHandle);
235 bool connected (PortHandle, bool process_callback_safe);
236 bool connected_to (PortHandle, const std::string&, bool process_callback_safe);
237 bool physically_connected (PortHandle, bool process_callback_safe);
238 int get_connections (PortHandle, std::vector<std::string>&, bool process_callback_safe);
241 int midi_event_get (pframes_t& timestamp, size_t& size, uint8_t** buf, void* port_buffer, uint32_t event_index);
242 int midi_event_put (void* port_buffer, pframes_t timestamp, const uint8_t* buffer, size_t size);
243 uint32_t get_midi_event_count (void* port_buffer);
244 void midi_clear (void* port_buffer);
248 bool can_monitor_input () const;
249 int request_input_monitoring (PortHandle, bool);
250 int ensure_input_monitoring (PortHandle, bool);
251 bool monitoring_input (PortHandle);
253 /* Latency management */
255 void set_latency_range (PortHandle, bool for_playback, LatencyRange);
256 LatencyRange get_latency_range (PortHandle, bool for_playback);
258 /* Discovering physical ports */
260 bool port_is_physical (PortHandle) const;
261 void get_physical_outputs (DataType type, std::vector<std::string>&);
262 void get_physical_inputs (DataType type, std::vector<std::string>&);
263 ChanCount n_physical_outputs () const;
264 ChanCount n_physical_inputs () const;
266 /* Getting access to the data buffer for a port */
268 void* get_buffer (PortHandle, pframes_t);
270 void* main_process_thread ();
273 std::string _instance_name;
278 size_t _samples_per_period;
280 static size_t _max_buffer_size;
285 uint32_t _systemic_input_latency;
286 uint32_t _systemic_output_latency;
288 uint64_t _processed_samples;
290 pthread_t _main_thread;
292 /* process threads */
293 static void* dummy_process_thread (void *);
294 std::vector<pthread_t> _threads;
297 DummyAudioBackend* engine;
298 boost::function<void ()> f;
301 ThreadData (DummyAudioBackend* e, boost::function<void ()> fp, size_t stacksz)
302 : engine (e) , f (fp) , stacksize (stacksz) {}
306 PortHandle add_port (const std::string& shortname, ARDOUR::DataType, ARDOUR::PortFlags);
307 int register_system_ports ();
308 void unregister_system_ports ();
310 std::vector<DummyPort *> _ports;
312 bool valid_port (PortHandle port) const {
313 return std::find (_ports.begin (), _ports.end (), (DummyPort*)port) != _ports.end ();
315 DummyPort * find_port (const std::string& port_name) const {
316 for (std::vector<DummyPort*>::const_iterator it = _ports.begin (); it != _ports.end (); ++it) {
317 if ((*it)->name () == port_name) {
324 }; // class DummyAudioBackend
328 #endif /* __libbackend_dummy_audiobackend_h__ */