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livetrax/libs/backends/dummy/dummy_audiobackend.h

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/*
* Copyright (C) 2014 Robin Gareus <robin@gareus.org>
* Copyright (C) 2013 Paul Davis
*
* 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., 675 Mass Ave, Cambridge, MA 02139, 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>
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#include <boost/shared_ptr.hpp>
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#include "ardour/types.h"
#include "ardour/audio_backend.h"
#include "ardour/dsp_load_calculator.h"
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namespace ARDOUR {
class DummyAudioBackend;
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namespace DummyMidiData {
typedef struct _MIDISequence {
float beat_time;
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uint8_t size;
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uint8_t event[3];
} MIDISequence;
};
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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 {
protected:
DummyPort (DummyAudioBackend &b, const std::string&, PortFlags);
public:
virtual ~DummyPort ();
const std::string& name () const { return _name; }
PortFlags flags () const { return _flags; }
int set_name (const std::string &name) { _name = name; return 0; }
virtual DataType type () const = 0;
bool is_input () const { return flags () & IsInput; }
bool is_output () const { return flags () & IsOutput; }
bool is_physical () const { return flags () & IsPhysical; }
bool is_terminal () const { return flags () & IsTerminal; }
bool is_connected () const { return _connections.size () != 0; }
bool is_connected (const DummyPort *port) const;
bool is_physically_connected () const;
const std::vector<DummyPort *>& get_connections () const { return _connections; }
int connect (DummyPort *port);
int disconnect (DummyPort *port);
void disconnect_all ();
virtual void* get_buffer (pframes_t nframes) = 0;
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void next_period () { _gen_cycle = false; }
const LatencyRange latency_range (bool for_playback) const
{
return for_playback ? _playback_latency_range : _capture_latency_range;
}
void set_latency_range (const LatencyRange &latency_range, bool for_playback)
{
if (for_playback)
{
_playback_latency_range = latency_range;
}
else
{
_capture_latency_range = latency_range;
}
}
private:
DummyAudioBackend &_dummy_backend;
std::string _name;
const PortFlags _flags;
LatencyRange _capture_latency_range;
LatencyRange _playback_latency_range;
std::vector<DummyPort*> _connections;
void _connect (DummyPort* , bool);
void _disconnect (DummyPort* , bool);
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protected:
// random number generator
void setup_random_number_generator ();
inline float randf ();
inline uint32_t randi ();
uint32_t _rseed;
// signal generator
volatile bool _gen_cycle;
Glib::Threads::Mutex generator_lock;
}; // 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,
UniformWhiteNoise,
GaussianWhiteNoise,
PinkNoise,
PonyNoise,
SineWave,
SquareWave,
KronekerDelta,
SineSweep,
SineSweepSwell,
SquareSweep,
SquareSweepSwell,
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Loopback,
};
void setup_generator (GeneratorType const, float const);
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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;
}; // 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; }
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void setup_generator (int, float const);
void set_loopback (DummyMidiBuffer const * const src);
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private:
DummyMidiBuffer _buffer;
DummyMidiBuffer _loopback;
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// midi event generator ('fake' physical inputs)
void midi_generate (const pframes_t n_samples);
float _midi_seq_spb; // samples per beat
int32_t _midi_seq_time;
uint32_t _midi_seq_pos;
DummyMidiData::MIDISequence const * _midi_seq_dat;
}; // class DummyMidiPort
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class DummyAudioBackend : public AudioBackend {
friend class DummyPort;
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public:
DummyAudioBackend (AudioEngine& e, AudioBackendInfo& info);
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~DummyAudioBackend ();
bool is_running () const { return _running; }
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/* AUDIOBACKEND API */
std::string name () const;
bool is_realtime () const;
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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&);
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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;
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; }
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int reset_device () { return 0; };
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/* 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; }
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/* 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;
}
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/* 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 */
framepos_t sample_time ();
framepos_t sample_time_at_cycle_start ();
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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;
bool available () const;
uint32_t port_name_size () const;
int set_port_name (PortHandle, const std::string&);
std::string get_port_name (PortHandle) const;
PortHandle get_port_by_name (const std::string&) const;
int get_ports (const std::string& port_name_pattern, DataType type, PortFlags flags, std::vector<std::string>&) const;
DataType port_data_type (PortHandle) const;
PortHandle register_port (const std::string& shortname, ARDOUR::DataType, ARDOUR::PortFlags);
void unregister_port (PortHandle);
int connect (const std::string& src, const std::string& dst);
int disconnect (const std::string& src, const std::string& dst);
int connect (PortHandle, const std::string&);
int disconnect (PortHandle, const std::string&);
int disconnect_all (PortHandle);
bool connected (PortHandle, bool process_callback_safe);
bool connected_to (PortHandle, const std::string&, bool process_callback_safe);
bool physically_connected (PortHandle, bool process_callback_safe);
int get_connections (PortHandle, std::vector<std::string>&, bool process_callback_safe);
/* MIDI */
int midi_event_get (pframes_t& timestamp, size_t& size, uint8_t** 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);
/* Discovering physical ports */
bool port_is_physical (PortHandle) const;
void get_physical_outputs (DataType type, std::vector<std::string>&);
void get_physical_inputs (DataType type, std::vector<std::string>&);
ChanCount n_physical_outputs () const;
ChanCount n_physical_inputs () const;
/* Getting access to the data buffer for a port */
void* get_buffer (PortHandle, pframes_t);
void* main_process_thread ();
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static size_t max_buffer_size() {return _max_buffer_size;}
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private:
enum MidiPortMode {
MidiNoEvents,
MidiGenerator,
MidiLoopback,
MidiToAudio,
};
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struct DriverSpeed {
std::string name;
float speedup;
DriverSpeed (const std::string& n, float s) : name (n), speedup (s) {}
};
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std::string _instance_name;
static std::vector<std::string> _midi_options;
static std::vector<AudioBackend::DeviceStatus> _device_status;
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static std::vector<DummyAudioBackend::DriverSpeed> _driver_speed;
bool _running;
bool _freewheel;
bool _freewheeling;
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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;
framecnt_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 */
PortHandle add_port (const std::string& shortname, ARDOUR::DataType, ARDOUR::PortFlags);
int register_system_ports ();
void unregister_ports (bool system_only = false);
std::vector<DummyAudioPort *> _system_inputs;
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std::vector<DummyAudioPort *> _system_outputs;
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std::vector<DummyMidiPort *> _system_midi_in;
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std::vector<DummyMidiPort *> _system_midi_out;
std::vector<DummyPort *> _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);
}
bool valid_port (PortHandle port) const {
return std::find (_ports.begin (), _ports.end (), (DummyPort*)port) != _ports.end ();
}
DummyPort * find_port (const std::string& port_name) const {
for (std::vector<DummyPort*>::const_iterator it = _ports.begin (); it != _ports.end (); ++it) {
if ((*it)->name () == port_name) {
return *it;
}
}
return NULL;
}
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}; // class DummyAudioBackend
} // namespace
#endif /* __libbackend_dummy_audiobackend_h__ */