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livetrax/libs/backends/dummy/dummy_audiobackend.h

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/*
* Copyright (C) 2014-2018 Paul Davis <paul@linuxaudiosystems.com>
* Copyright (C) 2014-2018 Robin Gareus <robin@gareus.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifndef __libbackend_dummy_audiobackend_h__
#define __libbackend_dummy_audiobackend_h__
#include <string>
#include <vector>
#include <map>
#include <set>
#include <stdint.h>
#include <pthread.h>
#include <ltc.h>
#include <boost/shared_ptr.hpp>
#include "pbd/natsort.h"
#include "pbd/ringbuffer.h"
#include "ardour/types.h"
#include "ardour/audio_backend.h"
#include "ardour/dsp_load_calculator.h"
#include "ardour/port_engine_shared.h"
namespace ARDOUR {
class DummyAudioBackend;
namespace DummyMidiData {
typedef struct _MIDISequence {
float beat_time;
uint8_t size;
uint8_t event[3];
} MIDISequence;
};
class DummyMidiEvent {
public:
DummyMidiEvent (const pframes_t timestamp, const uint8_t* data, size_t size);
DummyMidiEvent (const DummyMidiEvent& other);
~DummyMidiEvent ();
size_t size () const { return _size; };
pframes_t timestamp () const { return _timestamp; };
const unsigned char* const_data () const { return _data; };
unsigned char* data () { return _data; };
bool operator< (const DummyMidiEvent &other) const { return timestamp () < other.timestamp (); };
private:
size_t _size;
pframes_t _timestamp;
uint8_t *_data;
};
typedef std::vector<boost::shared_ptr<DummyMidiEvent> > DummyMidiBuffer;
class DummyPort : public BackendPort {
protected:
DummyPort (DummyAudioBackend &b, const std::string&, PortFlags);
public:
virtual ~DummyPort ();
void next_period () { _gen_cycle = false; }
protected:
/* random number generator */
void setup_random_number_generator ();
inline float randf ();
inline uint32_t randi ();
uint32_t _rseed;
/* engine time */
pframes_t pulse_position () const;
// signal generator
volatile bool _gen_cycle;
Glib::Threads::Mutex generator_lock;
private:
AudioBackend& _engine;
}; // class DummyPort
class DummyAudioPort : public DummyPort {
public:
DummyAudioPort (DummyAudioBackend &b, const std::string&, PortFlags);
~DummyAudioPort ();
DataType type () const { return DataType::AUDIO; };
Sample* buffer () { return _buffer; }
const Sample* const_buffer () const { return _buffer; }
void* get_buffer (pframes_t nframes);
enum GeneratorType {
Silence,
DC05,
Demolition,
UniformWhiteNoise,
GaussianWhiteNoise,
PinkNoise,
PonyNoise,
SineWave,
SineWaveOctaves,
SquareWave,
KronekerDelta,
SineSweep,
SineSweepSwell,
SquareSweep,
SquareSweepSwell,
OneHz,
LTC,
Loopback,
};
std::string setup_generator (GeneratorType const, float const, int, int);
void fill_wavetable (const float* d, size_t n_samples) { assert(_wavetable != 0); memcpy(_wavetable, d, n_samples * sizeof(float)); }
void midi_to_wavetable (DummyMidiBuffer const * const src, size_t n_samples);
private:
Sample _buffer[8192];
// signal generator ('fake' physical inputs)
void generate (const pframes_t n_samples);
GeneratorType _gen_type;
// generator buffers
// pink-noise filters
float _b0, _b1, _b2, _b3, _b4, _b5, _b6;
// generated sinf() samples
Sample * _wavetable;
uint32_t _gen_period;
uint32_t _gen_offset;
uint32_t _gen_perio2;
uint32_t _gen_count2;
// gaussian noise generator
float grandf ();
bool _pass;
float _rn1;
// LTC generator
LTCEncoder* _ltc;
PBD::RingBuffer<Sample>* _ltcbuf;
float _ltc_spd;
float _ltc_rand;
}; // class DummyAudioPort
class DummyMidiPort : public DummyPort {
public:
DummyMidiPort (DummyAudioBackend &b, const std::string&, PortFlags);
~DummyMidiPort ();
DataType type () const { return DataType::MIDI; };
void* get_buffer (pframes_t nframes);
const DummyMidiBuffer * const_buffer () const { return &_buffer; }
std::string setup_generator (int, float const);
void set_loopback (DummyMidiBuffer const * const src);
private:
DummyMidiBuffer _buffer;
DummyMidiBuffer _loopback;
// midi event generator ('fake' physical inputs)
void midi_generate (const pframes_t n_samples);
float _midi_seq_spb; // samples per beat
int64_t _midi_seq_time;
uint32_t _midi_seq_pos;
DummyMidiData::MIDISequence const * _midi_seq_dat;
}; // class DummyMidiPort
class DummyAudioBackend : public AudioBackend, public PortEngineSharedImpl {
friend class DummyPort;
public:
DummyAudioBackend (AudioEngine& e, AudioBackendInfo& info);
~DummyAudioBackend ();
bool is_running () const { return _running; }
/* AUDIOBACKEND API */
std::string name () const;
bool is_realtime () const;
bool requires_driver_selection() const { return true; }
std::string driver_name () const;
std::vector<std::string> enumerate_drivers () const;
int set_driver (const std::string&);
std::vector<DeviceStatus> enumerate_devices () const;
std::vector<float> available_sample_rates (const std::string& device) const;
std::vector<uint32_t> available_buffer_sizes (const std::string& device) const;
uint32_t available_input_channel_count (const std::string& device) const;
uint32_t available_output_channel_count (const std::string& device) const;
bool can_change_sample_rate_when_running () const;
bool can_change_buffer_size_when_running () const;
bool can_measure_systemic_latency () const { return true; }
int set_device_name (const std::string&);
int set_sample_rate (float);
int set_buffer_size (uint32_t);
int set_interleaved (bool yn);
int set_input_channels (uint32_t);
int set_output_channels (uint32_t);
int set_systemic_input_latency (uint32_t);
int set_systemic_output_latency (uint32_t);
int set_systemic_midi_input_latency (std::string const, uint32_t) { return 0; }
int set_systemic_midi_output_latency (std::string const, uint32_t) { return 0; }
int reset_device () { return 0; };
/* Retrieving parameters */
std::string device_name () const;
float sample_rate () const;
uint32_t buffer_size () const;
bool interleaved () const;
uint32_t input_channels () const;
uint32_t output_channels () const;
uint32_t systemic_input_latency () const;
uint32_t systemic_output_latency () const;
uint32_t systemic_midi_input_latency (std::string const) const { return 0; }
uint32_t systemic_midi_output_latency (std::string const) const { return 0; }
/* External control app */
std::string control_app_name () const { return std::string (); }
void launch_control_app () {}
/* MIDI */
std::vector<std::string> enumerate_midi_options () const;
int set_midi_option (const std::string&);
std::string midi_option () const;
std::vector<DeviceStatus> enumerate_midi_devices () const {
return std::vector<AudioBackend::DeviceStatus> ();
}
int set_midi_device_enabled (std::string const, bool) {
return 0;
}
bool midi_device_enabled (std::string const) const {
return true;
}
bool can_set_systemic_midi_latencies () const {
return false;
}
/* State Control */
protected:
int _start (bool for_latency_measurement);
public:
int stop ();
int freewheel (bool);
float dsp_load () const;
size_t raw_buffer_size (DataType t);
/* Process time */
samplepos_t sample_time ();
samplepos_t sample_time_at_cycle_start ();
pframes_t samples_since_cycle_start ();
int create_process_thread (boost::function<void()> func);
int join_process_threads ();
bool in_process_thread ();
uint32_t process_thread_count ();
void update_latencies ();
/* PORTENGINE API */
void* private_handle () const;
const std::string& my_name () const;
/* PortEngine API - forwarded to PortEngineSharedImpl */
bool port_is_physical (PortEngine::PortHandle ph) const { return PortEngineSharedImpl::port_is_physical (ph); }
void get_physical_outputs (DataType type, std::vector<std::string>& results) { PortEngineSharedImpl::get_physical_outputs (type, results); }
void get_physical_inputs (DataType type, std::vector<std::string>& results) { PortEngineSharedImpl::get_physical_inputs (type, results); }
ChanCount n_physical_outputs () const { return PortEngineSharedImpl::n_physical_outputs (); }
ChanCount n_physical_inputs () const { return PortEngineSharedImpl::n_physical_inputs (); }
uint32_t port_name_size () const { return PortEngineSharedImpl::port_name_size(); }
int set_port_name (PortEngine::PortHandle ph, const std::string& name) { return PortEngineSharedImpl::set_port_name (ph, name); }
std::string get_port_name (PortEngine::PortHandle ph) const { return PortEngineSharedImpl::get_port_name (ph); }
PortFlags get_port_flags (PortEngine::PortHandle ph) const { return PortEngineSharedImpl::get_port_flags (ph); }
PortEngine::PortPtr get_port_by_name (std::string const & name) const { return PortEngineSharedImpl::get_port_by_name (name); }
int get_port_property (PortEngine::PortHandle ph, const std::string& key, std::string& value, std::string& type) const { return PortEngineSharedImpl::get_port_property (ph, key, value, type); }
int set_port_property (PortEngine::PortHandle ph, const std::string& key, const std::string& value, const std::string& type) { return PortEngineSharedImpl::set_port_property (ph, key, value, type); }
int get_ports (const std::string& port_name_pattern, DataType type, PortFlags flags, std::vector<std::string>& results) const { return PortEngineSharedImpl::get_ports (port_name_pattern, type, flags, results); }
DataType port_data_type (PortEngine::PortHandle ph) const { return PortEngineSharedImpl::port_data_type (ph); }
PortEngine::PortPtr register_port (const std::string& shortname, ARDOUR::DataType type, ARDOUR::PortFlags flags) { return PortEngineSharedImpl::register_port (shortname, type, flags); }
void unregister_port (PortHandle ph) { if (!_running) return; PortEngineSharedImpl::unregister_port (ph); }
int connect (const std::string& src, const std::string& dst) { return PortEngineSharedImpl::connect (src, dst); }
int disconnect (const std::string& src, const std::string& dst) { return PortEngineSharedImpl::disconnect (src, dst); }
int connect (PortEngine::PortHandle ph, const std::string& other) { return PortEngineSharedImpl::connect (ph, other); }
int disconnect (PortEngine::PortHandle ph, const std::string& other) { return PortEngineSharedImpl::disconnect (ph, other); }
int disconnect_all (PortEngine::PortHandle ph) { return PortEngineSharedImpl::disconnect_all (ph); }
bool connected (PortEngine::PortHandle ph, bool process_callback_safe) { return PortEngineSharedImpl::connected (ph, process_callback_safe); }
bool connected_to (PortEngine::PortHandle ph, const std::string& other, bool process_callback_safe) { return PortEngineSharedImpl::connected_to (ph, other, process_callback_safe); }
bool physically_connected (PortEngine::PortHandle ph, bool process_callback_safe) { return PortEngineSharedImpl::physically_connected (ph, process_callback_safe); }
int get_connections (PortEngine::PortHandle ph, std::vector<std::string>& results, bool process_callback_safe) { return PortEngineSharedImpl::get_connections (ph, results, process_callback_safe); }
/* MIDI */
int midi_event_get (pframes_t& timestamp, size_t& size, uint8_t const** buf, void* port_buffer, uint32_t event_index);
int midi_event_put (void* port_buffer, pframes_t timestamp, const uint8_t* buffer, size_t size);
uint32_t get_midi_event_count (void* port_buffer);
void midi_clear (void* port_buffer);
/* Monitoring */
bool can_monitor_input () const;
int request_input_monitoring (PortHandle, bool);
int ensure_input_monitoring (PortHandle, bool);
bool monitoring_input (PortHandle);
/* Latency management */
void set_latency_range (PortHandle, bool for_playback, LatencyRange);
LatencyRange get_latency_range (PortHandle, bool for_playback);
/* Getting access to the data buffer for a port */
void* get_buffer (PortHandle, pframes_t);
void* main_process_thread ();
static size_t max_buffer_size() {return _max_buffer_size;}
private:
enum MidiPortMode {
MidiNoEvents,
MidiGenerator,
MidiOneHz,
MidiLoopback,
MidiToAudio,
};
struct DriverSpeed {
std::string name;
float speedup;
DriverSpeed (const std::string& n, float s) : name (n), speedup (s) {}
};
std::string _instance_name;
static std::vector<std::string> _midi_options;
static std::vector<AudioBackend::DeviceStatus> _device_status;
static std::vector<DummyAudioBackend::DriverSpeed> _driver_speed;
bool _running;
bool _freewheel;
bool _freewheeling;
float _speedup;
std::string _device;
float _samplerate;
size_t _samples_per_period;
float _dsp_load;
DSPLoadCalculator _dsp_load_calc;
static size_t _max_buffer_size;
uint32_t _n_inputs;
uint32_t _n_outputs;
uint32_t _n_midi_inputs;
uint32_t _n_midi_outputs;
MidiPortMode _midi_mode;
uint32_t _systemic_input_latency;
uint32_t _systemic_output_latency;
samplecnt_t _processed_samples;
pthread_t _main_thread;
/* process threads */
static void* dummy_process_thread (void *);
std::vector<pthread_t> _threads;
struct ThreadData {
DummyAudioBackend* engine;
boost::function<void ()> f;
size_t stacksize;
ThreadData (DummyAudioBackend* e, boost::function<void ()> fp, size_t stacksz)
: engine (e) , f (fp) , stacksize (stacksz) {}
};
/* port engine */
int register_system_ports ();
struct PortConnectData {
std::string a;
std::string b;
bool c;
PortConnectData (const std::string& a, const std::string& b, bool c)
: a (a) , b (b) , c (c) {}
};
std::vector<PortConnectData *> _port_connection_queue;
pthread_mutex_t _port_callback_mutex;
bool _port_change_flag;
void port_connect_callback (const std::string& a, const std::string& b, bool conn) {
pthread_mutex_lock (&_port_callback_mutex);
_port_connection_queue.push_back(new PortConnectData(a, b, conn));
pthread_mutex_unlock (&_port_callback_mutex);
}
void port_connect_add_remove_callback () {
pthread_mutex_lock (&_port_callback_mutex);
_port_change_flag = true;
pthread_mutex_unlock (&_port_callback_mutex);
}
BackendPort* port_factory (std::string const & name, ARDOUR::DataType type, ARDOUR::PortFlags);
}; // class DummyAudioBackend
} // namespace
#endif /* __libbackend_dummy_audiobackend_h__ */
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