#include <sys/time.h>
#include <regex.h>
+#include <stdlib.h>
+
+#include <glibmm.h>
+
+#ifdef PLATFORM_WINDOWS
+#include <windows.h>
+#include <pbd/windows_timer_utils.h>
+#endif
#include "dummy_audiobackend.h"
+#include "dummy_midi_seq.h"
+
#include "pbd/error.h"
+#include "ardour/port_manager.h"
#include "i18n.h"
using namespace ARDOUR;
static std::string s_instance_name;
size_t DummyAudioBackend::_max_buffer_size = 8192;
+std::vector<std::string> DummyAudioBackend::_midi_options;
+std::vector<AudioBackend::DeviceStatus> DummyAudioBackend::_device_status;
+
+std::vector<DummyAudioBackend::DriverSpeed> DummyAudioBackend::_driver_speed;
+
+static int64_t _x_get_monotonic_usec() {
+#ifdef PLATFORM_WINDOWS
+ return PBD::get_microseconds();
+#endif
+ return g_get_monotonic_time();
+}
DummyAudioBackend::DummyAudioBackend (AudioEngine& e, AudioBackendInfo& info)
: AudioBackend (e, info)
, _running (false)
+ , _freewheel (false)
, _freewheeling (false)
+ , _speedup (1.0)
+ , _device ("")
, _samplerate (48000)
, _samples_per_period (1024)
, _dsp_load (0)
, _n_inputs (0)
, _n_outputs (0)
+ , _n_midi_inputs (0)
+ , _n_midi_outputs (0)
+ , _midi_mode (MidiNoEvents)
, _systemic_input_latency (0)
, _systemic_output_latency (0)
, _processed_samples (0)
+ , _port_change_flag (false)
{
_instance_name = s_instance_name;
+ _device = _("Silence");
+ pthread_mutex_init (&_port_callback_mutex, 0);
+
+ if (_driver_speed.empty()) {
+ _driver_speed.push_back (DriverSpeed (_("Half Speed"), 2.0f));
+ _driver_speed.push_back (DriverSpeed (_("Normal Speed"), 1.0f));
+ _driver_speed.push_back (DriverSpeed (_("Double Speed"), 0.5f));
+ _driver_speed.push_back (DriverSpeed (_("5x Speed"), 0.2f));
+ _driver_speed.push_back (DriverSpeed (_("10x Speed"), 0.1f));
+ _driver_speed.push_back (DriverSpeed (_("15x Speed"), 0.06666f));
+ _driver_speed.push_back (DriverSpeed (_("20x Speed"), 0.05f));
+ _driver_speed.push_back (DriverSpeed (_("50x Speed"), 0.02f));
+ }
+
}
DummyAudioBackend::~DummyAudioBackend ()
{
+ pthread_mutex_destroy (&_port_callback_mutex);
}
/* AUDIOBACKEND API */
std::string
DummyAudioBackend::name () const
{
- return X_("Dummy");
+ return X_("Dummy"); // internal name
}
bool
std::vector<AudioBackend::DeviceStatus>
DummyAudioBackend::enumerate_devices () const
{
- std::vector<AudioBackend::DeviceStatus> s;
- s.push_back (DeviceStatus (_("Dummy"), true));
- return s;
+ if (_device_status.empty()) {
+ _device_status.push_back (DeviceStatus (_("Silence"), true));
+ _device_status.push_back (DeviceStatus (_("Sine Wave"), true));
+ _device_status.push_back (DeviceStatus (_("Square Wave"), true));
+ _device_status.push_back (DeviceStatus (_("Impulses"), true));
+ _device_status.push_back (DeviceStatus (_("Uniform White Noise"), true));
+ _device_status.push_back (DeviceStatus (_("Gaussian White Noise"), true));
+ _device_status.push_back (DeviceStatus (_("Pink Noise"), true));
+ _device_status.push_back (DeviceStatus (_("Pink Noise (low CPU)"), true));
+ _device_status.push_back (DeviceStatus (_("Sine Sweep"), true));
+ _device_status.push_back (DeviceStatus (_("Sine Sweep Swell"), true));
+ _device_status.push_back (DeviceStatus (_("Square Sweep"), true));
+ _device_status.push_back (DeviceStatus (_("Square Sweep Swell"), true));
+ _device_status.push_back (DeviceStatus (_("Loopback"), true));
+ }
+ return _device_status;
}
std::vector<float>
return true;
}
+std::vector<std::string>
+DummyAudioBackend::enumerate_drivers () const
+{
+ std::vector<std::string> speed_drivers;
+ for (std::vector<DriverSpeed>::const_iterator it = _driver_speed.begin () ; it != _driver_speed.end (); ++it) {
+ speed_drivers.push_back (it->name);
+ }
+ return speed_drivers;
+}
+
+std::string
+DummyAudioBackend::driver_name () const
+{
+ for (std::vector<DriverSpeed>::const_iterator it = _driver_speed.begin () ; it != _driver_speed.end (); ++it) {
+ if (rintf (1e6f * _speedup) == rintf (1e6f * it->speedup)) {
+ return it->name;
+ }
+ }
+ assert (0);
+ return _("Normal Speed");
+}
+
+int
+DummyAudioBackend::set_driver (const std::string& d)
+{
+ for (std::vector<DriverSpeed>::const_iterator it = _driver_speed.begin () ; it != _driver_speed.end (); ++it) {
+ if (d == it->name) {
+ _speedup = it->speedup;
+ return 0;
+ }
+ }
+ assert (0);
+ return -1;
+}
+
int
-DummyAudioBackend::set_device_name (const std::string&)
+DummyAudioBackend::set_device_name (const std::string& d)
{
+ _device = d;
return 0;
}
int
DummyAudioBackend::set_buffer_size (uint32_t bs)
{
- if (bs <= 0 || bs >= _max_buffer_size) {
+ if (bs <= 0 || bs > _max_buffer_size) {
return -1;
}
_samples_per_period = bs;
+
+ /* update port latencies
+ * with 'Loopback' there is exactly once cycle latency,
+ * divide it between In + Out;
+ */
+ LatencyRange lr;
+ lr.min = lr.max = _systemic_input_latency;
+ for (std::vector<DummyAudioPort*>::const_iterator it = _system_inputs.begin (); it != _system_inputs.end (); ++it) {
+ set_latency_range (*it, false, lr);
+ }
+ for (std::vector<DummyMidiPort*>::const_iterator it = _system_midi_in.begin (); it != _system_midi_in.end (); ++it) {
+ set_latency_range (*it, false, lr);
+ }
+
+ lr.min = lr.max = _systemic_output_latency;
+ for (std::vector<DummyAudioPort*>::const_iterator it = _system_outputs.begin (); it != _system_outputs.end (); ++it) {
+ set_latency_range (*it, true, lr);
+ }
+ for (std::vector<DummyMidiPort*>::const_iterator it = _system_midi_out.begin (); it != _system_midi_out.end (); ++it) {
+ set_latency_range (*it, true, lr);
+ }
+
engine.buffer_size_change (bs);
return 0;
}
std::string
DummyAudioBackend::device_name () const
{
- return _("Dummy Device");
+ return _device;
}
float
return _systemic_output_latency;
}
+
/* MIDI */
std::vector<std::string>
DummyAudioBackend::enumerate_midi_options () const
{
- std::vector<std::string> m;
- m.push_back (_("None"));
- return m;
+ if (_midi_options.empty()) {
+ _midi_options.push_back (_("1 in, 1 out, Silence"));
+ _midi_options.push_back (_("2 in, 2 out, Silence"));
+ _midi_options.push_back (_("8 in, 8 out, Silence"));
+ _midi_options.push_back (_("Midi Event Generators"));
+ _midi_options.push_back (_("8 in, 8 out, Loopback"));
+ _midi_options.push_back (_("MIDI to Audio, Loopback"));
+ _midi_options.push_back (_("No MIDI I/O"));
+ }
+ return _midi_options;
}
int
-DummyAudioBackend::set_midi_option (const std::string&)
+DummyAudioBackend::set_midi_option (const std::string& opt)
{
- return -1;
+ _midi_mode = MidiNoEvents;
+ if (opt == _("1 in, 1 out, Silence")) {
+ _n_midi_inputs = _n_midi_outputs = 1;
+ }
+ else if (opt == _("2 in, 2 out, Silence")) {
+ _n_midi_inputs = _n_midi_outputs = 2;
+ }
+ else if (opt == _("8 in, 8 out, Silence")) {
+ _n_midi_inputs = _n_midi_outputs = 8;
+ }
+ else if (opt == _("Midi Event Generators")) {
+ _n_midi_inputs = _n_midi_outputs = NUM_MIDI_EVENT_GENERATORS;
+ _midi_mode = MidiGenerator;
+ }
+ else if (opt == _("8 in, 8 out, Loopback")) {
+ _n_midi_inputs = _n_midi_outputs = 8;
+ _midi_mode = MidiLoopback;
+ }
+ else if (opt == _("MIDI to Audio, Loopback")) {
+ _n_midi_inputs = _n_midi_outputs = UINT32_MAX;
+ _midi_mode = MidiToAudio;
+ }
+ else {
+ _n_midi_inputs = _n_midi_outputs = 0;
+ }
+ return 0;
}
std::string
DummyAudioBackend::midi_option () const
{
- return "";
+ return ""; // TODO
}
/* State Control */
{
if (_running) {
PBD::error << _("DummyAudioBackend: already active.") << endmsg;
- return -1;
+ return BackendReinitializationError;
}
if (_ports.size()) {
PBD::warning << _("DummyAudioBackend: recovering from unclean shutdown, port registry is not empty.") << endmsg;
+ for (std::vector<DummyPort*>::const_iterator it = _ports.begin (); it != _ports.end (); ++it) {
+ PBD::info << _("DummyAudioBackend: port '") << (*it)->name () << "' exists." << endmsg;
+ }
+ _system_inputs.clear();
+ _system_outputs.clear();
+ _system_midi_in.clear();
+ _system_midi_out.clear();
_ports.clear();
}
if (register_system_ports()) {
PBD::error << _("DummyAudioBackend: failed to register system ports.") << endmsg;
- return -1;
+ return PortRegistrationError;
}
+ engine.sample_rate_change (_samplerate);
+ engine.buffer_size_change (_samples_per_period);
+
+ _dsp_load_calc.set_max_time (_samplerate, _samples_per_period);
+
if (engine.reestablish_ports ()) {
PBD::error << _("DummyAudioBackend: Could not re-establish ports.") << endmsg;
stop ();
- return -1;
+ return PortReconnectError;
}
engine.reconnect_ports ();
+ _port_change_flag = false;
if (pthread_create (&_main_thread, NULL, pthread_process, this)) {
PBD::error << _("DummyAudioBackend: cannot start.") << endmsg;
}
int timeout = 5000;
- while (!_running && --timeout > 0) { usleep (1000); }
+ while (!_running && --timeout > 0) { Glib::usleep (1000); }
if (timeout == 0 || !_running) {
PBD::error << _("DummyAudioBackend: failed to start process thread.") << endmsg;
- return -1;
+ return ProcessThreadStartError;
}
- return 0;
+ return NoError;
}
int
{
void *status;
if (!_running) {
- return -1;
+ return 0;
}
_running = false;
PBD::error << _("DummyAudioBackend: failed to terminate.") << endmsg;
return -1;
}
- unregister_system_ports();
+ unregister_ports();
return 0;
}
int
DummyAudioBackend::freewheel (bool onoff)
{
- if (onoff == _freewheeling) {
- return 0;
- }
_freewheeling = onoff;
- engine.freewheel_callback (onoff);
return 0;
}
{
switch (t) {
case DataType::AUDIO:
- return _max_buffer_size * sizeof(Sample);
+ return _samples_per_period * sizeof(Sample);
case DataType::MIDI:
return _max_buffer_size; // XXX not really limited
}
}
/* Process time */
-pframes_t
+framepos_t
DummyAudioBackend::sample_time ()
{
return _processed_samples;
}
-pframes_t
+framepos_t
DummyAudioBackend::sample_time_at_cycle_start ()
{
return _processed_samples;
if (pthread_create (&thread_id, &attr, dummy_process_thread, td)) {
PBD::error << _("AudioEngine: cannot create process thread.") << endmsg;
+ pthread_attr_destroy (&attr);
return -1;
}
+ pthread_attr_destroy (&attr);
_threads.push_back (thread_id);
return 0;
bool
DummyAudioBackend::in_process_thread ()
{
+ if (pthread_equal (_main_thread, pthread_self()) != 0) {
+ return true;
+ }
+
for (std::vector<pthread_t>::const_iterator i = _threads.begin (); i != _threads.end (); ++i)
{
if (pthread_equal (*i, pthread_self ()) != 0) {
void
DummyAudioBackend::update_latencies ()
{
+ // trigger latency callback in RT thread (locked graph)
+ port_connect_add_remove_callback();
}
/* PORTENGINE API */
}
for (size_t i = 0; i < _ports.size (); ++i) {
DummyPort* port = _ports[i];
- if ((port->type () == type) && (port->flags () & flags)) {
+ if ((port->type () == type) && flags == (port->flags () & flags)) {
if (!use_regexp || !regexec (&port_regex, port->name ().c_str (), 0, NULL, 0)) {
port_names.push_back (port->name ());
++rv;
{
if (name.size () == 0) { return 0; }
if (flags & IsPhysical) { return 0; }
+ if (!_running) {
+ PBD::info << _("DummyBackend::register_port: Engine is not running.") << endmsg;
+ }
return add_port (_instance_name + ":" + name, type, flags);
}
DummyPort* port = NULL;
switch (type) {
case DataType::AUDIO:
- port = new DummyAudioPort (name, flags);
+ port = new DummyAudioPort (*this, name, flags);
break;
case DataType::MIDI:
- port = new DummyMidiPort (name, flags);
+ port = new DummyMidiPort (*this, name, flags);
break;
default:
PBD::error << _("DummyBackend::register_port: Invalid Data Type.") << endmsg;
void
DummyAudioBackend::unregister_port (PortEngine::PortHandle port_handle)
{
- if (!valid_port (port_handle)) {
- PBD::error << _("DummyBackend::unregister_port: Invalid Port.") << endmsg;
+ if (!_running) {
+ PBD::info << _("DummyBackend::unregister_port: Engine is not running.") << endmsg;
+ assert (!valid_port (port_handle));
+ return;
}
DummyPort* port = static_cast<DummyPort*>(port_handle);
std::vector<DummyPort*>::iterator i = std::find (_ports.begin (), _ports.end (), static_cast<DummyPort*>(port_handle));
DummyAudioBackend::register_system_ports()
{
LatencyRange lr;
+ enum DummyAudioPort::GeneratorType gt;
+ if (_device == _("Uniform White Noise")) {
+ gt = DummyAudioPort::UniformWhiteNoise;
+ } else if (_device == _("Gaussian White Noise")) {
+ gt = DummyAudioPort::GaussianWhiteNoise;
+ } else if (_device == _("Pink Noise")) {
+ gt = DummyAudioPort::PinkNoise;
+ } else if (_device == _("Pink Noise (low CPU)")) {
+ gt = DummyAudioPort::PonyNoise;
+ } else if (_device == _("Sine Wave")) {
+ gt = DummyAudioPort::SineWave;
+ } else if (_device == _("Square Wave")) {
+ gt = DummyAudioPort::SquareWave;
+ } else if (_device == _("Impulses")) {
+ gt = DummyAudioPort::KronekerDelta;
+ } else if (_device == _("Sine Sweep")) {
+ gt = DummyAudioPort::SineSweep;
+ } else if (_device == _("Sine Sweep Swell")) {
+ gt = DummyAudioPort::SineSweepSwell;
+ } else if (_device == _("Square Sweep")) {
+ gt = DummyAudioPort::SquareSweep;
+ } else if (_device == _("Square Sweep Swell")) {
+ gt = DummyAudioPort::SquareSweepSwell;
+ } else if (_device == _("Loopback")) {
+ gt = DummyAudioPort::Loopback;
+ } else {
+ gt = DummyAudioPort::Silence;
+ }
+
+ if (_midi_mode == MidiToAudio) {
+ gt = DummyAudioPort::Loopback;
+ }
const int a_ins = _n_inputs > 0 ? _n_inputs : 8;
const int a_out = _n_outputs > 0 ? _n_outputs : 8;
- const int m_ins = 2; // TODO
- const int m_out = 2;
+ const int m_ins = _n_midi_inputs == UINT_MAX ? 0 : _n_midi_inputs;
+ const int m_out = _n_midi_outputs == UINT_MAX ? a_ins : _n_midi_outputs;
+
/* audio ports */
- lr.min = lr.max = _samples_per_period + _systemic_input_latency;
+ lr.min = lr.max = _systemic_input_latency;
for (int i = 1; i <= a_ins; ++i) {
char tmp[64];
snprintf(tmp, sizeof(tmp), "system:capture_%d", i);
PortHandle p = add_port(std::string(tmp), DataType::AUDIO, static_cast<PortFlags>(IsOutput | IsPhysical | IsTerminal));
if (!p) return -1;
set_latency_range (p, false, lr);
+ _system_inputs.push_back (static_cast<DummyAudioPort*>(p));
+ static_cast<DummyAudioPort*>(p)->setup_generator (gt, _samplerate);
}
- lr.min = lr.max = _samples_per_period + _systemic_output_latency;
+ lr.min = lr.max = _systemic_output_latency;
for (int i = 1; i <= a_out; ++i) {
char tmp[64];
snprintf(tmp, sizeof(tmp), "system:playback_%d", i);
PortHandle p = add_port(std::string(tmp), DataType::AUDIO, static_cast<PortFlags>(IsInput | IsPhysical | IsTerminal));
if (!p) return -1;
- set_latency_range (p, false, lr);
+ set_latency_range (p, true, lr);
+ _system_outputs.push_back (static_cast<DummyAudioPort*>(p));
}
/* midi ports */
- lr.min = lr.max = _samples_per_period + _systemic_input_latency;
- for (int i = 1; i <= m_ins; ++i) {
+ lr.min = lr.max = _systemic_input_latency;
+ for (int i = 0; i < m_ins; ++i) {
char tmp[64];
- snprintf(tmp, sizeof(tmp), "system:midi_capture_%d", i);
+ snprintf(tmp, sizeof(tmp), "system:midi_capture_%d", i+1);
PortHandle p = add_port(std::string(tmp), DataType::MIDI, static_cast<PortFlags>(IsOutput | IsPhysical | IsTerminal));
if (!p) return -1;
set_latency_range (p, false, lr);
+ _system_midi_in.push_back (static_cast<DummyMidiPort*>(p));
+ if (_midi_mode == MidiGenerator) {
+ static_cast<DummyMidiPort*>(p)->setup_generator (i % NUM_MIDI_EVENT_GENERATORS, _samplerate);
+ }
}
- lr.min = lr.max = _samples_per_period + _systemic_output_latency;
+ lr.min = lr.max = _systemic_output_latency;
for (int i = 1; i <= m_out; ++i) {
char tmp[64];
snprintf(tmp, sizeof(tmp), "system:midi_playback_%d", i);
PortHandle p = add_port(std::string(tmp), DataType::MIDI, static_cast<PortFlags>(IsInput | IsPhysical | IsTerminal));
if (!p) return -1;
- set_latency_range (p, false, lr);
+ set_latency_range (p, true, lr);
+ _system_midi_out.push_back (static_cast<DummyMidiPort*>(p));
}
-
return 0;
}
void
-DummyAudioBackend::unregister_system_ports()
+DummyAudioBackend::unregister_ports (bool system_only)
{
- size_t i = 0;
- while (i < _ports.size ()) {
- DummyPort* port = _ports[i];
- if (port->is_physical () && port->is_terminal ()) {
+ _system_inputs.clear();
+ _system_outputs.clear();
+ _system_midi_in.clear();
+ _system_midi_out.clear();
+
+ for (std::vector<DummyPort*>::iterator i = _ports.begin (); i != _ports.end ();) {
+ DummyPort* port = *i;
+ if (! system_only || (port->is_physical () && port->is_terminal ())) {
port->disconnect_all ();
- _ports.erase (_ports.begin() + i);
+ delete port;
+ i = _ports.erase (i);
} else {
++i;
}
assert (buffer && port_buffer);
DummyMidiBuffer& dst = * static_cast<DummyMidiBuffer*>(port_buffer);
if (dst.size () && (pframes_t)dst.back ()->timestamp () > timestamp) {
- fprintf (stderr, "DummyMidiBuffer: it's too late for this event.\n");
- return -1;
+ // nevermind, ::get_buffer() sorts events, but always print warning
+ fprintf (stderr, "DummyMidiBuffer: it's too late for this event %d > %d.\n", (pframes_t)dst.back ()->timestamp (), timestamp);
}
dst.push_back (boost::shared_ptr<DummyMidiEvent>(new DummyMidiEvent (timestamp, buffer, size)));
+#if 0 // DEBUG MIDI EVENTS
+ printf("DummyAudioBackend::midi_event_put %d, %zu: ", timestamp, size);
+ for (size_t xx = 0; xx < size; ++xx) {
+ printf(" %02x", buffer[xx]);
+ }
+ printf("\n");
+#endif
return 0;
}
uint32_t
DummyAudioBackend::get_midi_event_count (void* port_buffer)
{
- assert (port_buffer && _running);
+ assert (port_buffer);
return static_cast<DummyMidiBuffer*>(port_buffer)->size ();
}
void
DummyAudioBackend::midi_clear (void* port_buffer)
{
- assert (port_buffer && _running);
+ assert (port_buffer);
DummyMidiBuffer * buf = static_cast<DummyMidiBuffer*>(port_buffer);
assert (buf);
buf->clear ();
LatencyRange
DummyAudioBackend::get_latency_range (PortEngine::PortHandle port, bool for_playback)
{
+ LatencyRange r;
if (!valid_port (port)) {
PBD::error << _("DummyPort::get_latency_range (): invalid port.") << endmsg;
- LatencyRange r;
r.min = 0;
r.max = 0;
return r;
}
- return static_cast<DummyPort*>(port)->latency_range (for_playback);
+ DummyPort *p = static_cast<DummyPort*>(port);
+ assert(p);
+
+ r = p->latency_range (for_playback);
+ if (p->is_physical() && p->is_terminal()) {
+ if (p->is_input() && for_playback) {
+ const size_t l_in = _samples_per_period * .25;
+ r.min += l_in;
+ r.max += l_in;
+ }
+ if (p->is_output() && !for_playback) {
+ /* with 'Loopback' there is exactly once cycle latency, divide it between In + Out; */
+ const size_t l_in = _samples_per_period * .25;
+ const size_t l_out = _samples_per_period - l_in;
+ r.min += l_out;
+ r.max += l_out;
+ }
+ }
+ return r;
}
/* Discovering physical ports */
{
for (size_t i = 0; i < _ports.size (); ++i) {
DummyPort* port = _ports[i];
- if ((port->type () == type) && port->is_output () && port->is_physical ()) {
+ if ((port->type () == type) && port->is_input () && port->is_physical ()) {
port_names.push_back (port->name ());
}
}
{
for (size_t i = 0; i < _ports.size (); ++i) {
DummyPort* port = _ports[i];
- if ((port->type () == type) && port->is_input () && port->is_physical ()) {
+ if ((port->type () == type) && port->is_output () && port->is_physical ()) {
port_names.push_back (port->name ());
}
}
void*
DummyAudioBackend::get_buffer (PortEngine::PortHandle port, pframes_t nframes)
{
- assert (port && _running);
+ assert (port);
assert (valid_port (port));
return static_cast<DummyPort*>(port)->get_buffer (nframes);
}
_running = true;
_processed_samples = 0;
- struct timeval clock1, clock2;
- ::gettimeofday (&clock1, NULL);
+ manager.registration_callback();
+ manager.graph_order_callback();
+
+ int64_t clock1;
+ clock1 = -1;
while (_running) {
+
+ if (_freewheeling != _freewheel) {
+ _freewheel = _freewheeling;
+ engine.freewheel_callback (_freewheel);
+ }
+
+ // re-set input buffers, generate on demand.
+ for (std::vector<DummyAudioPort*>::const_iterator it = _system_inputs.begin (); it != _system_inputs.end (); ++it) {
+ (*it)->next_period();
+ }
+ for (std::vector<DummyMidiPort*>::const_iterator it = _system_midi_in.begin (); it != _system_midi_in.end (); ++it) {
+ (*it)->next_period();
+ }
+
if (engine.process_callback (_samples_per_period)) {
return 0;
}
_processed_samples += _samples_per_period;
- if (!_freewheeling) {
- ::gettimeofday (&clock2, NULL);
- const int elapsed_time = (clock2.tv_sec - clock1.tv_sec) * 1000000 + (clock2.tv_usec - clock1.tv_usec);
- const int nomial_time = 1000000 * _samples_per_period / _samplerate;
- _dsp_load = elapsed_time / (float) nomial_time;
- if (elapsed_time < nomial_time) {
- ::usleep (nomial_time - elapsed_time);
+
+ if (_device == _("Loopback") && _midi_mode != MidiToAudio) {
+ int opn = 0;
+ int opc = _system_outputs.size();
+ for (std::vector<DummyAudioPort*>::const_iterator it = _system_inputs.begin (); it != _system_inputs.end (); ++it, ++opn) {
+ DummyAudioPort* op = _system_outputs[(opn % opc)];
+ (*it)->fill_wavetable ((const float*)op->get_buffer (_samples_per_period), _samples_per_period);
+ }
+ }
+
+ if (_midi_mode == MidiLoopback) {
+ int opn = 0;
+ int opc = _system_midi_out.size();
+ for (std::vector<DummyMidiPort*>::const_iterator it = _system_midi_in.begin (); it != _system_midi_in.end (); ++it, ++opn) {
+ DummyMidiPort* op = _system_midi_out[(opn % opc)];
+ op->get_buffer(0); // mix-down
+ (*it)->set_loopback (op->const_buffer());
+ }
+ }
+ else if (_midi_mode == MidiToAudio) {
+ int opn = 0;
+ int opc = _system_midi_out.size();
+ for (std::vector<DummyAudioPort*>::const_iterator it = _system_inputs.begin (); it != _system_inputs.end (); ++it, ++opn) {
+ DummyMidiPort* op = _system_midi_out[(opn % opc)];
+ op->get_buffer(0); // mix-down
+ (*it)->midi_to_wavetable (op->const_buffer(), _samples_per_period);
+ }
+ }
+
+ if (!_freewheel) {
+ _dsp_load_calc.set_start_timestamp_us (clock1);
+ _dsp_load_calc.set_stop_timestamp_us (_x_get_monotonic_usec());
+ _dsp_load = _dsp_load_calc.get_dsp_load_unbound ();
+
+ const int64_t elapsed_time = _dsp_load_calc.elapsed_time_us ();
+ const int64_t nominal_time = _dsp_load_calc.get_max_time_us ();
+ if (elapsed_time < nominal_time) {
+ const int64_t sleepy = _speedup * (nominal_time - elapsed_time);
+ Glib::usleep (std::max ((int64_t) 100, sleepy));
} else {
- ::usleep (100); // don't hog cpu
+ Glib::usleep (100); // don't hog cpu
}
} else {
- _dsp_load = 1.0;
- ::usleep (100); // don't hog cpu
+ _dsp_load = 1.0f;
+ Glib::usleep (100); // don't hog cpu
+ }
+
+ /* beginning of next cycle */
+ clock1 = _x_get_monotonic_usec();
+
+ bool connections_changed = false;
+ bool ports_changed = false;
+ if (!pthread_mutex_trylock (&_port_callback_mutex)) {
+ if (_port_change_flag) {
+ ports_changed = true;
+ _port_change_flag = false;
+ }
+ if (!_port_connection_queue.empty ()) {
+ connections_changed = true;
+ }
+ while (!_port_connection_queue.empty ()) {
+ PortConnectData *c = _port_connection_queue.back ();
+ manager.connect_callback (c->a, c->b, c->c);
+ _port_connection_queue.pop_back ();
+ delete c;
+ }
+ pthread_mutex_unlock (&_port_callback_mutex);
+ }
+ if (ports_changed) {
+ manager.registration_callback();
}
- ::gettimeofday (&clock1, NULL);
+ if (connections_changed) {
+ manager.graph_order_callback();
+ }
+ if (connections_changed || ports_changed) {
+ engine.latency_callback(false);
+ engine.latency_callback(true);
+ }
+
}
_running = false;
return 0;
static int instantiate (const std::string& arg1, const std::string& /* arg2 */);
static int deinstantiate ();
static bool already_configured ();
+static bool available ();
static ARDOUR::AudioBackendInfo _descriptor = {
- "Dummy",
+ _("None (Dummy)"),
instantiate,
deinstantiate,
backend_factory,
already_configured,
+ available
};
static boost::shared_ptr<AudioBackend>
static bool
already_configured ()
{
+ // special-case: unit-tests require backend to be pre-configured.
+ if (s_instance_name == "Unit-Test") {
+ return true;
+ }
return false;
}
+static bool
+available ()
+{
+ return true;
+}
+
extern "C" ARDOURBACKEND_API ARDOUR::AudioBackendInfo* descriptor ()
{
return &_descriptor;
/******************************************************************************/
-DummyPort::DummyPort (const std::string& name, PortFlags flags)
- : _name (name)
+DummyPort::DummyPort (DummyAudioBackend &b, const std::string& name, PortFlags flags)
+ : _dummy_backend (b)
+ , _name (name)
, _flags (flags)
+ , _rseed (0)
+ , _gen_cycle (false)
{
_capture_latency_range.min = 0;
_capture_latency_range.max = 0;
_playback_latency_range.min = 0;
_playback_latency_range.max = 0;
+ _dummy_backend.port_connect_add_remove_callback();
}
DummyPort::~DummyPort () {
disconnect_all ();
+ _dummy_backend.port_connect_add_remove_callback();
}
_connections.push_back (port);
if (callback) {
port->_connect (this, false);
+ _dummy_backend.port_connect_callback (name(), port->name(), true);
}
}
if (callback) {
port->_disconnect (this, false);
+ _dummy_backend.port_connect_callback (name(), port->name(), false);
}
}
{
while (!_connections.empty ()) {
_connections.back ()->_disconnect (this, false);
+ _dummy_backend.port_connect_callback (name(), _connections.back ()->name(), false);
_connections.pop_back ();
}
}
return false;
}
+void DummyPort::setup_random_number_generator ()
+{
+#ifdef PLATFORM_WINDOWS
+ LARGE_INTEGER Count;
+ if (QueryPerformanceCounter (&Count)) {
+ _rseed = Count.QuadPart % UINT_MAX;
+ } else
+#endif
+ {
+ _rseed = g_get_monotonic_time() % UINT_MAX;
+ }
+ _rseed = (_rseed + (uint64_t)this) % UINT_MAX;
+ if (_rseed == 0) _rseed = 1;
+}
+
+inline uint32_t
+DummyPort::randi ()
+{
+ // 31bit Park-Miller-Carta Pseudo-Random Number Generator
+ // http://www.firstpr.com.au/dsp/rand31/
+ uint32_t hi, lo;
+ lo = 16807 * (_rseed & 0xffff);
+ hi = 16807 * (_rseed >> 16);
+
+ lo += (hi & 0x7fff) << 16;
+ lo += hi >> 15;
+#if 1
+ lo = (lo & 0x7fffffff) + (lo >> 31);
+#else
+ if (lo > 0x7fffffff) { lo -= 0x7fffffff; }
+#endif
+ return (_rseed = lo);
+}
+
+inline float
+DummyPort::randf ()
+{
+ return (randi() / 1073741824.f) - 1.f;
+}
+
/******************************************************************************/
-DummyAudioPort::DummyAudioPort (const std::string& name, PortFlags flags)
- : DummyPort (name, flags)
+DummyAudioPort::DummyAudioPort (DummyAudioBackend &b, const std::string& name, PortFlags flags)
+ : DummyPort (b, name, flags)
+ , _gen_type (Silence)
+ , _b0 (0)
+ , _b1 (0)
+ , _b2 (0)
+ , _b3 (0)
+ , _b4 (0)
+ , _b5 (0)
+ , _b6 (0)
+ , _wavetable (0)
+ , _gen_period (0)
+ , _gen_offset (0)
+ , _gen_perio2 (0)
+ , _gen_count2 (0)
+ , _pass (false)
+ , _rn1 (0)
{
memset (_buffer, 0, sizeof (_buffer));
}
-DummyAudioPort::~DummyAudioPort () { }
+DummyAudioPort::~DummyAudioPort () {
+ free(_wavetable);
+ _wavetable = 0;
+}
+
+void DummyAudioPort::setup_generator (GeneratorType const g, float const samplerate)
+{
+ DummyPort::setup_random_number_generator();
+ _gen_type = g;
+
+ switch (_gen_type) {
+ case PinkNoise:
+ case PonyNoise:
+ case UniformWhiteNoise:
+ case GaussianWhiteNoise:
+ case Silence:
+ break;
+ case KronekerDelta:
+ _gen_period = (5 + randi() % (int)(samplerate / 20.f));
+ break;
+ case SquareWave:
+ _gen_period = (5 + randi() % (int)(samplerate / 20.f)) & ~1;
+ break;
+ case SineWave:
+ _gen_period = 5 + randi() % (int)(samplerate / 20.f);
+ _wavetable = (Sample*) malloc (_gen_period * sizeof(Sample));
+ for (uint32_t i = 0 ; i < _gen_period; ++i) {
+ _wavetable[i] = .12589f * sinf(2.0f * M_PI * (float)i / (float)_gen_period); // -18dBFS
+ }
+ break;
+ case SquareSweep:
+ case SquareSweepSwell:
+ case SineSweep:
+ case SineSweepSwell:
+ {
+ _gen_period = 5 * samplerate + randi() % (int)(samplerate * 10.f);
+ _gen_period &= ~1;
+ _gen_perio2 = 1 | (int)ceilf (_gen_period * .89f); // Volume Swell period
+ const double f_min = 20.;
+ const double f_max = samplerate * .5;
+ const double g_p2 = _gen_period * .5;
+#ifdef LINEAR_SWEEP
+ const double b = (f_max - f_min) / (2. * samplerate * g_p2);
+ const double a = f_min / samplerate;
+#else
+ const double b = log (f_max / f_min) / g_p2;
+ const double a = f_min / (b * samplerate);
+#endif
+ const uint32_t g_p2i = rint(g_p2);
+ _wavetable = (Sample*) malloc (_gen_period * sizeof(Sample));
+ for (uint32_t i = 0 ; i < g_p2i; ++i) {
+#ifdef LINEAR_SWEEP
+ const double phase = i * (a + b * i);
+#else
+ const double phase = a * exp (b * i) - a;
+#endif
+ _wavetable[i] = (float)sin (2. * M_PI * (phase - floor (phase)));
+ }
+ for (uint32_t i = g_p2i; i < _gen_period; ++i) {
+ const uint32_t j = _gen_period - i;
+#ifdef LINEAR_SWEEP
+ const double phase = j * (a + b * j);
+#else
+ const double phase = a * exp (b * j) - a;
+#endif
+ _wavetable[i] = -(float)sin (2. * M_PI * (phase - floor (phase)));
+ }
+ if (_gen_type == SquareSweep) {
+ for (uint32_t i = 0 ; i < _gen_period; ++i) {
+ _wavetable[i] = _wavetable[i] < 0 ? -.40709f : .40709f;
+ }
+ }
+ else if (_gen_type == SquareSweepSwell) {
+ for (uint32_t i = 0 ; i < _gen_period; ++i) {
+ _wavetable[i] = _wavetable[i] < 0 ? -1 : 1;
+ }
+ }
+ }
+ break;
+ case Loopback:
+ _wavetable = (Sample*) malloc (DummyAudioBackend::max_buffer_size() * sizeof(Sample));
+ break;
+ }
+}
+
+void DummyAudioPort::midi_to_wavetable (DummyMidiBuffer const * const src, size_t n_samples)
+{
+ memset(_wavetable, 0, n_samples * sizeof(float));
+ /* generate an audio spike for every midi message
+ * to verify layency-compensation alignment
+ * (here: midi-out playback-latency + audio-in capture-latency)
+ */
+ for (DummyMidiBuffer::const_iterator it = src->begin (); it != src->end (); ++it) {
+ const pframes_t t = (*it)->timestamp();
+ assert(t < n_samples);
+ // somewhat arbitrary mapping for quick visual feedback
+ float v = -.5f;
+ if ((*it)->size() == 3) {
+ const unsigned char *d = (*it)->const_data();
+ if ((d[0] & 0xf0) == 0x90) { // note on
+ v = .25f + d[2] / 512.f;
+ }
+ else if ((d[0] & 0xf0) == 0x80) { // note off
+ v = .3f - d[2] / 640.f;
+ }
+ else if ((d[0] & 0xf0) == 0xb0) { // CC
+ v = -.1f - d[2] / 256.f;
+ }
+ }
+ _wavetable[t] += v;
+ }
+}
+
+float DummyAudioPort::grandf ()
+{
+ // Gaussian White Noise
+ // http://www.musicdsp.org/archive.php?classid=0#109
+ float x1, x2, r;
+
+ if (_pass) {
+ _pass = false;
+ return _rn1;
+ }
+
+ do {
+ x1 = randf ();
+ x2 = randf ();
+ r = x1 * x1 + x2 * x2;
+ } while ((r >= 1.0f) || (r < 1e-22f));
+
+ r = sqrtf (-2.f * logf (r) / r);
+
+ _pass = true;
+ _rn1 = r * x2;
+ return r * x1;
+}
+
+void DummyAudioPort::generate (const pframes_t n_samples)
+{
+ Glib::Threads::Mutex::Lock lm (generator_lock);
+ if (_gen_cycle) {
+ return;
+ }
+
+ switch (_gen_type) {
+ case Silence:
+ memset (_buffer, 0, n_samples * sizeof (Sample));
+ break;
+ case SquareWave:
+ assert(_gen_period > 0);
+ for (pframes_t i = 0 ; i < n_samples; ++i) {
+ if (_gen_offset < _gen_period * .5f) {
+ _buffer[i] = .40709f; // -6dBFS
+ } else {
+ _buffer[i] = -.40709f;
+ }
+ _gen_offset = (_gen_offset + 1) % _gen_period;
+ }
+ break;
+ case KronekerDelta:
+ assert(_gen_period > 0);
+ memset (_buffer, 0, n_samples * sizeof (Sample));
+ for (pframes_t i = 0; i < n_samples; ++i) {
+ if (_gen_offset == 0) {
+ _buffer[i] = 1.0f;
+ }
+ _gen_offset = (_gen_offset + 1) % _gen_period;
+ }
+ break;
+ case SineSweepSwell:
+ case SquareSweepSwell:
+ assert(_wavetable && _gen_period > 0);
+ {
+ const float vols = 2.f / (float)_gen_perio2;
+ for (pframes_t i = 0; i < n_samples; ++i) {
+ const float g = fabsf (_gen_count2 * vols - 1.f);
+ _buffer[i] = g * _wavetable[_gen_offset];
+ _gen_offset = (_gen_offset + 1) % _gen_period;
+ _gen_count2 = (_gen_count2 + 1) % _gen_perio2;
+ }
+ }
+ break;
+ case Loopback:
+ _gen_period = n_samples; // XXX DummyBackend::_samples_per_period;
+ case SineWave:
+ case SineSweep:
+ case SquareSweep:
+ assert(_wavetable && _gen_period > 0);
+ {
+ pframes_t written = 0;
+ while (written < n_samples) {
+ const uint32_t remain = n_samples - written;
+ const uint32_t to_copy = std::min(remain, _gen_period - _gen_offset);
+ memcpy((void*)&_buffer[written],
+ (void*)&_wavetable[_gen_offset],
+ to_copy * sizeof(Sample));
+ written += to_copy;
+ _gen_offset = (_gen_offset + to_copy) % _gen_period;
+ }
+ }
+ break;
+ case UniformWhiteNoise:
+ for (pframes_t i = 0 ; i < n_samples; ++i) {
+ _buffer[i] = .158489f * randf();
+ }
+ break;
+ case GaussianWhiteNoise:
+ for (pframes_t i = 0 ; i < n_samples; ++i) {
+ _buffer[i] = .089125f * grandf();
+ }
+ break;
+ case PinkNoise:
+ for (pframes_t i = 0 ; i < n_samples; ++i) {
+ // Paul Kellet's refined method
+ // http://www.musicdsp.org/files/pink.txt
+ // NB. If 'white' consists of uniform random numbers,
+ // the pink noise will have an almost gaussian distribution.
+ const float white = .0498f * randf ();
+ _b0 = .99886f * _b0 + white * .0555179f;
+ _b1 = .99332f * _b1 + white * .0750759f;
+ _b2 = .96900f * _b2 + white * .1538520f;
+ _b3 = .86650f * _b3 + white * .3104856f;
+ _b4 = .55000f * _b4 + white * .5329522f;
+ _b5 = -.7616f * _b5 - white * .0168980f;
+ _buffer[i] = _b0 + _b1 + _b2 + _b3 + _b4 + _b5 + _b6 + white * 0.5362f;
+ _b6 = white * 0.115926f;
+ }
+ break;
+ case PonyNoise:
+ for (pframes_t i = 0 ; i < n_samples; ++i) {
+ const float white = 0.0498f * randf ();
+ // Paul Kellet's economy method
+ // http://www.musicdsp.org/files/pink.txt
+ _b0 = 0.99765f * _b0 + white * 0.0990460f;
+ _b1 = 0.96300f * _b1 + white * 0.2965164f;
+ _b2 = 0.57000f * _b2 + white * 1.0526913f;
+ _buffer[i] = _b0 + _b1 + _b2 + white * 0.1848f;
+ }
+ break;
+ }
+ _gen_cycle = true;
+}
void* DummyAudioPort::get_buffer (pframes_t n_samples)
{
if (it == get_connections ().end ()) {
memset (_buffer, 0, n_samples * sizeof (Sample));
} else {
- DummyAudioPort const * source = static_cast<const DummyAudioPort*>(*it);
+ DummyAudioPort * source = static_cast<DummyAudioPort*>(*it);
assert (source && source->is_output ());
+ if (source->is_physical() && source->is_terminal()) {
+ source->get_buffer(n_samples); // generate signal.
+ }
memcpy (_buffer, source->const_buffer (), n_samples * sizeof (Sample));
while (++it != get_connections ().end ()) {
- source = static_cast<const DummyAudioPort*>(*it);
+ source = static_cast<DummyAudioPort*>(*it);
assert (source && source->is_output ());
Sample* dst = buffer ();
+ if (source->is_physical() && source->is_terminal()) {
+ source->get_buffer(n_samples); // generate signal.
+ }
const Sample* src = source->const_buffer ();
for (uint32_t s = 0; s < n_samples; ++s, ++dst, ++src) {
*dst += *src;
}
}
} else if (is_output () && is_physical () && is_terminal()) {
- memset (_buffer, 0, n_samples * sizeof (Sample));
+ if (!_gen_cycle) {
+ generate(n_samples);
+ }
}
return _buffer;
}
-DummyMidiPort::DummyMidiPort (const std::string& name, PortFlags flags)
- : DummyPort (name, flags)
+DummyMidiPort::DummyMidiPort (DummyAudioBackend &b, const std::string& name, PortFlags flags)
+ : DummyPort (b, name, flags)
+ , _midi_seq_spb (0)
+ , _midi_seq_time (0)
+ , _midi_seq_pos (0)
+{
+ _buffer.clear ();
+ _loopback.clear ();
+}
+
+DummyMidiPort::~DummyMidiPort () {
+ _buffer.clear ();
+ _loopback.clear ();
+}
+
+struct MidiEventSorter {
+ bool operator() (const boost::shared_ptr<DummyMidiEvent>& a, const boost::shared_ptr<DummyMidiEvent>& b) {
+ return *a < *b;
+ }
+};
+
+void DummyMidiPort::set_loopback (DummyMidiBuffer const * const src)
{
+ _loopback.clear ();
+ for (DummyMidiBuffer::const_iterator it = src->begin (); it != src->end (); ++it) {
+ _loopback.push_back (boost::shared_ptr<DummyMidiEvent>(new DummyMidiEvent (**it)));
+ }
+}
+
+void DummyMidiPort::setup_generator (int seq_id, const float sr)
+{
+ DummyPort::setup_random_number_generator();
+ _midi_seq_dat = DummyMidiData::sequences[seq_id % NUM_MIDI_EVENT_GENERATORS];
+ _midi_seq_spb = sr * .5f; // 120 BPM, beat_time 1.0 per beat.
+ _midi_seq_pos = 0;
+ _midi_seq_time = 0;
+}
+
+void DummyMidiPort::midi_generate (const pframes_t n_samples)
+{
+ Glib::Threads::Mutex::Lock lm (generator_lock);
+ if (_gen_cycle) {
+ return;
+ }
+
_buffer.clear ();
+ _gen_cycle = true;
+
+ if (_midi_seq_spb == 0 || !_midi_seq_dat) {
+ for (DummyMidiBuffer::const_iterator it = _loopback.begin (); it != _loopback.end (); ++it) {
+ _buffer.push_back (boost::shared_ptr<DummyMidiEvent>(new DummyMidiEvent (**it)));
+ }
+ return;
+ }
+
+ while (1) {
+ const int32_t ev_beat_time = _midi_seq_dat[_midi_seq_pos].beat_time * _midi_seq_spb - _midi_seq_time;
+ if (ev_beat_time < 0) {
+ break;
+ }
+ if ((pframes_t) ev_beat_time >= n_samples) {
+ break;
+ }
+ _buffer.push_back (boost::shared_ptr<DummyMidiEvent>(new DummyMidiEvent (
+ ev_beat_time,
+ _midi_seq_dat[_midi_seq_pos].event,
+ _midi_seq_dat[_midi_seq_pos].size
+ )));
+ ++_midi_seq_pos;
+
+ if (_midi_seq_dat[_midi_seq_pos].event[0] == 0xff && _midi_seq_dat[_midi_seq_pos].event[1] == 0xff) {
+ _midi_seq_time -= _midi_seq_dat[_midi_seq_pos].beat_time * _midi_seq_spb;
+ _midi_seq_pos = 0;
+ }
+ }
+ _midi_seq_time += n_samples;
}
-DummyMidiPort::~DummyMidiPort () { }
-void* DummyMidiPort::get_buffer (pframes_t /* nframes */)
+void* DummyMidiPort::get_buffer (pframes_t n_samples)
{
if (is_input ()) {
_buffer.clear ();
for (std::vector<DummyPort*>::const_iterator i = get_connections ().begin ();
i != get_connections ().end ();
++i) {
- const DummyMidiBuffer src = static_cast<const DummyMidiPort*>(*i)->const_buffer ();
- for (DummyMidiBuffer::const_iterator it = src.begin (); it != src.end (); ++it) {
+ DummyMidiPort * source = static_cast<DummyMidiPort*>(*i);
+ if (source->is_physical() && source->is_terminal()) {
+ source->get_buffer(n_samples); // generate signal.
+ }
+ const DummyMidiBuffer *src = source->const_buffer ();
+ for (DummyMidiBuffer::const_iterator it = src->begin (); it != src->end (); ++it) {
_buffer.push_back (boost::shared_ptr<DummyMidiEvent>(new DummyMidiEvent (**it)));
}
}
- std::sort (_buffer.begin (), _buffer.end ());
+ std::sort (_buffer.begin (), _buffer.end (), MidiEventSorter());
} else if (is_output () && is_physical () && is_terminal()) {
- _buffer.clear ();
+ if (!_gen_cycle) {
+ midi_generate(n_samples);
+ }
}
return &_buffer;
}
{
if (size > 0) {
_data = (uint8_t*) malloc (size);
- memcpy (_data, data, size);
+ memcpy (_data, data, size);
}
}