2 * Copyright (C) 2014-2015 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_portaudio_backend_h__
21 #define __libbackend_portaudio_backend_h__
30 #include <boost/shared_ptr.hpp>
32 #include "ardour/audio_backend.h"
33 #include "ardour/types.h"
35 #include "portaudio_io.h"
36 #include "winmmemidi_io.h"
37 #include "cycle_timer.h"
41 class PortAudioBackend;
45 PortMidiEvent (const pframes_t timestamp, const uint8_t* data, size_t size);
46 PortMidiEvent (const PortMidiEvent& other);
48 size_t size () const { return _size; };
49 pframes_t timestamp () const { return _timestamp; };
50 const unsigned char* const_data () const { return _data; };
51 unsigned char* data () { return _data; };
52 bool operator< (const PortMidiEvent &other) const { return timestamp () < other.timestamp (); };
59 typedef std::vector<boost::shared_ptr<PortMidiEvent> > PortMidiBuffer;
61 class PamPort { // PortAudio / PortMidi Backend Port
63 PamPort (PortAudioBackend &b, const std::string&, PortFlags);
67 const std::string& name () const { return _name; }
68 const std::string& pretty_name () const { return _pretty_name; }
69 PortFlags flags () const { return _flags; }
71 int set_name (const std::string &name) { _name = name; return 0; }
72 int set_pretty_name (const std::string& name) { _pretty_name = name; return 0;}
74 virtual DataType type () const = 0;
76 bool is_input () const { return flags () & IsInput; }
77 bool is_output () const { return flags () & IsOutput; }
78 bool is_physical () const { return flags () & IsPhysical; }
79 bool is_terminal () const { return flags () & IsTerminal; }
80 bool is_connected () const { return _connections.size () != 0; }
81 bool is_connected (const PamPort *port) const;
82 bool is_physically_connected () const;
84 const std::vector<PamPort *>& get_connections () const { return _connections; }
86 int connect (PamPort *port);
87 int disconnect (PamPort *port);
88 void disconnect_all ();
90 virtual void* get_buffer (pframes_t nframes) = 0;
92 const LatencyRange latency_range (bool for_playback) const
94 return for_playback ? _playback_latency_range : _capture_latency_range;
97 void set_latency_range (const LatencyRange &latency_range, bool for_playback)
101 _playback_latency_range = latency_range;
105 _capture_latency_range = latency_range;
110 PortAudioBackend &_osx_backend;
112 std::string _pretty_name;
113 const PortFlags _flags;
114 LatencyRange _capture_latency_range;
115 LatencyRange _playback_latency_range;
116 std::vector<PamPort*> _connections;
118 void _connect (PamPort* , bool);
119 void _disconnect (PamPort* , bool);
123 class PortAudioPort : public PamPort {
125 PortAudioPort (PortAudioBackend &b, const std::string&, PortFlags);
128 DataType type () const { return DataType::AUDIO; };
130 Sample* buffer () { return _buffer; }
131 const Sample* const_buffer () const { return _buffer; }
132 void* get_buffer (pframes_t nframes);
135 Sample _buffer[8192];
136 }; // class PortAudioPort
138 class PortMidiPort : public PamPort {
140 PortMidiPort (PortAudioBackend &b, const std::string&, PortFlags);
143 DataType type () const { return DataType::MIDI; };
145 void* get_buffer (pframes_t nframes);
146 const PortMidiBuffer * const_buffer () const { return & _buffer[_bufperiod]; }
148 void next_period() { if (_n_periods > 1) { get_buffer(0); _bufperiod = (_bufperiod + 1) % _n_periods; } }
149 void set_n_periods(int n) { if (n > 0 && n < 3) { _n_periods = n; } }
152 PortMidiBuffer _buffer[2];
155 }; // class PortMidiPort
157 class PortAudioBackend : public AudioBackend {
158 friend class PamPort;
160 PortAudioBackend (AudioEngine& e, AudioBackendInfo& info);
161 ~PortAudioBackend ();
163 /* AUDIOBACKEND API */
165 std::string name () const;
166 bool is_realtime () const;
168 bool requires_driver_selection() const;
169 std::string driver_name () const;
170 std::vector<std::string> enumerate_drivers () const;
171 int set_driver (const std::string&);
173 bool can_request_update_devices () { return true; }
174 bool update_devices ();
176 bool use_separate_input_and_output_devices () const;
177 std::vector<DeviceStatus> enumerate_devices () const;
178 std::vector<DeviceStatus> enumerate_input_devices () const;
179 std::vector<DeviceStatus> enumerate_output_devices () const;
181 std::vector<float> available_sample_rates (const std::string& device) const;
182 std::vector<uint32_t> available_buffer_sizes (const std::string& device) const;
183 uint32_t available_input_channel_count (const std::string& device) const;
184 uint32_t available_output_channel_count (const std::string& device) const;
186 bool can_change_sample_rate_when_running () const;
187 bool can_change_buffer_size_when_running () const;
189 int set_device_name (const std::string&);
190 int set_input_device_name (const std::string&);
191 int set_output_device_name (const std::string&);
192 int set_sample_rate (float);
193 int set_buffer_size (uint32_t);
194 int set_interleaved (bool yn);
195 int set_input_channels (uint32_t);
196 int set_output_channels (uint32_t);
197 int set_systemic_input_latency (uint32_t);
198 int set_systemic_output_latency (uint32_t);
199 int set_systemic_midi_input_latency (std::string const, uint32_t) { return 0; }
200 int set_systemic_midi_output_latency (std::string const, uint32_t) { return 0; }
202 int reset_device () { return 0; };
204 /* Retrieving parameters */
205 std::string device_name () const;
206 std::string input_device_name () const;
207 std::string output_device_name () const;
208 float sample_rate () const;
209 uint32_t buffer_size () const;
210 bool interleaved () const;
211 uint32_t input_channels () const;
212 uint32_t output_channels () const;
213 uint32_t systemic_input_latency () const;
214 uint32_t systemic_output_latency () const;
215 uint32_t systemic_midi_input_latency (std::string const) const { return 0; }
216 uint32_t systemic_midi_output_latency (std::string const) const { return 0; }
218 bool can_set_systemic_midi_latencies () const { return false; }
220 /* External control app */
221 std::string control_app_name () const;
222 void launch_control_app ();
225 std::vector<std::string> enumerate_midi_options () const;
226 int set_midi_option (const std::string&);
227 std::string midi_option () const;
229 std::vector<DeviceStatus> enumerate_midi_devices () const {
230 return std::vector<AudioBackend::DeviceStatus> ();
232 int set_midi_device_enabled (std::string const, bool) {
235 bool midi_device_enabled (std::string const) const {
241 int _start (bool for_latency_measurement);
244 int freewheel (bool);
245 float dsp_load () const;
246 size_t raw_buffer_size (DataType t);
249 framepos_t sample_time ();
250 framepos_t sample_time_at_cycle_start ();
251 pframes_t samples_since_cycle_start ();
253 int create_process_thread (boost::function<void()> func);
254 int join_process_threads ();
255 bool in_process_thread ();
256 uint32_t process_thread_count ();
258 void update_latencies ();
262 void* private_handle () const;
263 const std::string& my_name () const;
264 bool available () const;
265 uint32_t port_name_size () const;
267 int set_port_name (PortHandle, const std::string&);
268 std::string get_port_name (PortHandle) const;
269 PortHandle get_port_by_name (const std::string&) const;
270 int get_port_property (PortHandle, const std::string& key, std::string& value, std::string& type) const;
272 int get_ports (const std::string& port_name_pattern, DataType type, PortFlags flags, std::vector<std::string>&) const;
274 DataType port_data_type (PortHandle) const;
276 PortHandle register_port (const std::string& shortname, ARDOUR::DataType, ARDOUR::PortFlags);
277 void unregister_port (PortHandle);
279 int connect (const std::string& src, const std::string& dst);
280 int disconnect (const std::string& src, const std::string& dst);
281 int connect (PortHandle, const std::string&);
282 int disconnect (PortHandle, const std::string&);
283 int disconnect_all (PortHandle);
285 bool connected (PortHandle, bool process_callback_safe);
286 bool connected_to (PortHandle, const std::string&, bool process_callback_safe);
287 bool physically_connected (PortHandle, bool process_callback_safe);
288 int get_connections (PortHandle, std::vector<std::string>&, bool process_callback_safe);
291 int midi_event_get (pframes_t& timestamp, size_t& size, uint8_t** buf, void* port_buffer, uint32_t event_index);
292 int midi_event_put (void* port_buffer, pframes_t timestamp, const uint8_t* buffer, size_t size);
293 uint32_t get_midi_event_count (void* port_buffer);
294 void midi_clear (void* port_buffer);
298 bool can_monitor_input () const;
299 int request_input_monitoring (PortHandle, bool);
300 int ensure_input_monitoring (PortHandle, bool);
301 bool monitoring_input (PortHandle);
303 /* Latency management */
305 void set_latency_range (PortHandle, bool for_playback, LatencyRange);
306 LatencyRange get_latency_range (PortHandle, bool for_playback);
308 /* Discovering physical ports */
310 bool port_is_physical (PortHandle) const;
311 void get_physical_outputs (DataType type, std::vector<std::string>&);
312 void get_physical_inputs (DataType type, std::vector<std::string>&);
313 ChanCount n_physical_outputs () const;
314 ChanCount n_physical_inputs () const;
316 /* Getting access to the data buffer for a port */
318 void* get_buffer (PortHandle, pframes_t);
320 void* main_blocking_process_thread ();
323 bool start_blocking_process_thread ();
324 bool stop_blocking_process_thread ();
325 bool blocking_process_freewheel ();
326 bool blocking_process_main ();
328 void process_port_connection_changes ();
331 std::string _instance_name;
333 WinMMEMidiIO *_midiio;
335 bool _run; /* keep going or stop, ardour thread */
336 bool _active; /* is running, process thread */
339 bool _measure_latency;
341 uint64_t m_cycle_count;
342 uint64_t m_total_deviation_us;
343 uint64_t m_max_deviation_us;
345 CycleTimer m_cycle_timer;
346 uint64_t m_last_cycle_start;
348 static std::vector<std::string> _midi_options;
349 static std::vector<AudioBackend::DeviceStatus> _input_audio_device_status;
350 static std::vector<AudioBackend::DeviceStatus> _output_audio_device_status;
351 static std::vector<AudioBackend::DeviceStatus> _midi_device_status;
353 mutable std::string _input_audio_device;
354 mutable std::string _output_audio_device;
355 std::string _midi_driver_option;
359 size_t _samples_per_period;
360 static size_t _max_buffer_size;
365 uint32_t _systemic_audio_input_latency;
366 uint32_t _systemic_audio_output_latency;
368 /* portaudio specific */
369 int name_to_id(std::string) const;
373 framecnt_t _processed_samples;
375 /* blocking thread */
376 pthread_t _main_blocking_thread;
378 /* process threads */
379 static void* portaudio_process_thread (void *);
380 std::vector<pthread_t> _threads;
383 PortAudioBackend* engine;
384 boost::function<void ()> f;
387 ThreadData (PortAudioBackend* e, boost::function<void ()> fp, size_t stacksz)
388 : engine (e) , f (fp) , stacksize (stacksz) {}
392 PortHandle add_port (const std::string& shortname, ARDOUR::DataType, ARDOUR::PortFlags);
393 int register_system_audio_ports ();
394 int register_system_midi_ports ();
395 void unregister_ports (bool system_only = false);
397 std::vector<PamPort *> _ports;
398 std::vector<PamPort *> _system_inputs;
399 std::vector<PamPort *> _system_outputs;
400 std::vector<PamPort *> _system_midi_in;
401 std::vector<PamPort *> _system_midi_out;
403 struct PortConnectData {
408 PortConnectData (const std::string& a, const std::string& b, bool c)
409 : a (a) , b (b) , c (c) {}
412 std::vector<PortConnectData *> _port_connection_queue;
413 pthread_mutex_t _port_callback_mutex;
414 bool _port_change_flag;
416 void port_connect_callback (const std::string& a, const std::string& b, bool conn) {
417 pthread_mutex_lock (&_port_callback_mutex);
418 _port_connection_queue.push_back(new PortConnectData(a, b, conn));
419 pthread_mutex_unlock (&_port_callback_mutex);
422 void port_connect_add_remove_callback () {
423 pthread_mutex_lock (&_port_callback_mutex);
424 _port_change_flag = true;
425 pthread_mutex_unlock (&_port_callback_mutex);
428 bool valid_port (PortHandle port) const {
429 return std::find (_ports.begin (), _ports.end (), (PamPort*)port) != _ports.end ();
432 PamPort * find_port (const std::string& port_name) const {
433 for (std::vector<PamPort*>::const_iterator it = _ports.begin (); it != _ports.end (); ++it) {
434 if ((*it)->name () == port_name) {
441 PamPort * find_port_in (std::vector<PamPort *> plist, const std::string& port_name) const {
442 for (std::vector<PamPort*>::const_iterator it = plist.begin (); it != plist.end (); ++it) {
443 if ((*it)->name () == port_name) {
450 }; // class PortAudioBackend
454 #endif /* __libbackend_portaudio_backend_h__ */