* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
+#include <sys/time.h>
+#include <regex.h>
+#include <stdlib.h>
+
+#include <glibmm.h>
+
#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;
-DummyAudioBackend::DummyAudioBackend (AudioEngine& e)
- : AudioBackend (e)
+size_t DummyAudioBackend::_max_buffer_size = 8192;
+std::vector<std::string> DummyAudioBackend::_midi_options;
+std::vector<AudioBackend::DeviceStatus> DummyAudioBackend::_device_status;
+
+#ifdef PLATFORM_WINDOWS
+static double _win_pc_rate = 0; // usec per tick
+#endif
+
+static int64_t _x_get_monotonic_usec() {
+#ifdef PLATFORM_WINDOWS
+ if (_win_pc_rate > 0) {
+ LARGE_INTEGER Count;
+ // not very reliable, but the only realistic way for sub milli-seconds
+ if (QueryPerformanceCounter (&Count)) {
+ return (int64_t) (Count.QuadPart * _win_pc_rate);
+ }
+ return -1;
+ }
+#endif
+ return g_get_monotonic_time();
+}
+
+DummyAudioBackend::DummyAudioBackend (AudioEngine& e, AudioBackendInfo& info)
+ : AudioBackend (e, info)
+ , _running (false)
+ , _freewheel (false)
+ , _freewheeling (false)
+ , _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);
}
DummyAudioBackend::~DummyAudioBackend ()
{
+ pthread_mutex_destroy (&_port_callback_mutex);
}
/* AUDIOBACKEND API */
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>
DummyAudioBackend::available_sample_rates (const std::string&) const
{
std::vector<float> sr;
+ sr.push_back (8000.0);
+ sr.push_back (22050.0);
+ sr.push_back (24000.0);
sr.push_back (44100.0);
sr.push_back (48000.0);
+ sr.push_back (88200.0);
+ sr.push_back (96000.0);
+ sr.push_back (176400.0);
+ sr.push_back (192000.0);
return sr;
}
DummyAudioBackend::available_buffer_sizes (const std::string&) const
{
std::vector<uint32_t> bs;
+ bs.push_back (4);
+ bs.push_back (8);
+ bs.push_back (16);
+ bs.push_back (32);
bs.push_back (64);
+ bs.push_back (128);
+ bs.push_back (256);
+ bs.push_back (512);
bs.push_back (1024);
+ bs.push_back (2048);
+ bs.push_back (4096);
+ bs.push_back (8192);
return bs;
}
bool
DummyAudioBackend::can_change_sample_rate_when_running () const
{
- return false;
+ return true;
}
bool
DummyAudioBackend::can_change_buffer_size_when_running () const
{
- return false;
+ return true;
}
int
-DummyAudioBackend::set_device_name (const std::string&)
+DummyAudioBackend::set_device_name (const std::string& d)
{
- return -1;
+ _device = d;
+ return 0;
}
int
-DummyAudioBackend::set_sample_rate (float)
+DummyAudioBackend::set_sample_rate (float sr)
{
- return -1;
+ if (sr <= 0) { return -1; }
+ _samplerate = sr;
+ engine.sample_rate_change (sr);
+ return 0;
}
int
-DummyAudioBackend::set_buffer_size (uint32_t)
+DummyAudioBackend::set_buffer_size (uint32_t bs)
{
- return -1;
+ 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;
}
int
}
int
-DummyAudioBackend::set_input_channels (uint32_t)
+DummyAudioBackend::set_input_channels (uint32_t cc)
{
- return -1;
+ _n_inputs = cc;
+ return 0;
}
int
-DummyAudioBackend::set_output_channels (uint32_t)
+DummyAudioBackend::set_output_channels (uint32_t cc)
{
- return -1;
+ _n_outputs = cc;
+ return 0;
}
int
-DummyAudioBackend::set_systemic_input_latency (uint32_t)
+DummyAudioBackend::set_systemic_input_latency (uint32_t sl)
{
- return -1;
+ _systemic_input_latency = sl;
+ return 0;
}
int
-DummyAudioBackend::set_systemic_output_latency (uint32_t)
+DummyAudioBackend::set_systemic_output_latency (uint32_t sl)
{
- return -1;
+ _systemic_output_latency = sl;
+ return 0;
}
/* Retrieving parameters */
std::string
DummyAudioBackend::device_name () const
{
- return _("Dummy Device");
+ return _device;
}
float
DummyAudioBackend::sample_rate () const
{
- return 0;
+ return _samplerate;
}
uint32_t
DummyAudioBackend::buffer_size () const
{
- return 0;
+ return _samples_per_period;
}
bool
uint32_t
DummyAudioBackend::input_channels () const
{
- return 0;
+ return _n_inputs;
}
uint32_t
DummyAudioBackend::output_channels () const
{
- return 0;
+ return _n_outputs;
}
uint32_t
DummyAudioBackend::systemic_input_latency () const
{
- return 0;
+ return _systemic_input_latency;
}
uint32_t
DummyAudioBackend::systemic_output_latency () const
{
- return 0;
+ 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 */
+static void * pthread_process (void *arg)
+{
+ DummyAudioBackend *d = static_cast<DummyAudioBackend *>(arg);
+ d->main_process_thread ();
+ pthread_exit (0);
+ return 0;
+}
+
int
DummyAudioBackend::_start (bool /*for_latency_measurement*/)
{
- return -1;
+ if (_running) {
+ PBD::error << _("DummyAudioBackend: already active.") << endmsg;
+ return -1;
+ }
+
+ 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;
+ }
+
+ engine.sample_rate_change (_samplerate);
+ engine.buffer_size_change (_samples_per_period);
+
+ if (engine.reestablish_ports ()) {
+ PBD::error << _("DummyAudioBackend: Could not re-establish ports.") << endmsg;
+ stop ();
+ return -1;
+ }
+
+ 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) { Glib::usleep (1000); }
+
+ if (timeout == 0 || !_running) {
+ PBD::error << _("DummyAudioBackend: failed to start process thread.") << endmsg;
+ return -1;
+ }
+
+ return 0;
}
int
DummyAudioBackend::stop ()
{
- return -1;
+ void *status;
+ if (!_running) {
+ return 0;
+ }
+
+ _running = false;
+ if (pthread_join (_main_thread, &status)) {
+ PBD::error << _("DummyAudioBackend: failed to terminate.") << endmsg;
+ return -1;
+ }
+ unregister_ports();
+ return 0;
}
int
-DummyAudioBackend::freewheel (bool)
+DummyAudioBackend::freewheel (bool onoff)
{
+ _freewheeling = onoff;
return 0;
}
float
DummyAudioBackend::dsp_load () const
{
- return 0.0;
+ return 100.f * _dsp_load;
}
size_t
DummyAudioBackend::raw_buffer_size (DataType t)
{
+ switch (t) {
+ case DataType::AUDIO:
+ return _samples_per_period * sizeof(Sample);
+ case DataType::MIDI:
+ return _max_buffer_size; // XXX not really limited
+ }
return 0;
}
/* Process time */
-pframes_t
+framepos_t
DummyAudioBackend::sample_time ()
{
- return 0;
+ return _processed_samples;
}
-pframes_t
+framepos_t
DummyAudioBackend::sample_time_at_cycle_start ()
{
- return 0;
+ return _processed_samples;
}
pframes_t
return 0;
}
+
+void *
+DummyAudioBackend::dummy_process_thread (void *arg)
+{
+ ThreadData* td = reinterpret_cast<ThreadData*> (arg);
+ boost::function<void ()> f = td->f;
+ delete td;
+ f ();
+ return 0;
+}
+
int
DummyAudioBackend::create_process_thread (boost::function<void()> func)
{
- return -1;
+ pthread_t thread_id;
+ pthread_attr_t attr;
+ size_t stacksize = 100000;
+
+ pthread_attr_init (&attr);
+ pthread_attr_setstacksize (&attr, stacksize);
+ ThreadData* td = new ThreadData (this, func, stacksize);
+
+ 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;
}
int
DummyAudioBackend::join_process_threads ()
{
- return -1;
+ int rv = 0;
+
+ for (std::vector<pthread_t>::const_iterator i = _threads.begin (); i != _threads.end (); ++i)
+ {
+ void *status;
+ if (pthread_join (*i, &status)) {
+ PBD::error << _("AudioEngine: cannot terminate process thread.") << endmsg;
+ rv -= 1;
+ }
+ }
+ _threads.clear ();
+ return rv;
}
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) {
+ return true;
+ }
+ }
return false;
}
uint32_t
DummyAudioBackend::process_thread_count ()
{
- return 0;
+ return _threads.size ();
}
void
DummyAudioBackend::update_latencies ()
{
+ // trigger latency callback in RT thread (locked graph)
+ port_connect_add_remove_callback();
}
/* PORTENGINE API */
}
int
-DummyAudioBackend::set_port_name (PortEngine::PortHandle, const std::string&)
+DummyAudioBackend::set_port_name (PortEngine::PortHandle port, const std::string& name)
{
- return -1;
+ if (!valid_port (port)) {
+ PBD::error << _("DummyBackend::set_port_name: Invalid Port(s)") << endmsg;
+ return -1;
+ }
+ return static_cast<DummyPort*>(port)->set_name (_instance_name + ":" + name);
}
std::string
-DummyAudioBackend::get_port_name (PortEngine::PortHandle) const
+DummyAudioBackend::get_port_name (PortEngine::PortHandle port) const
{
- return "port:XXX";
+ if (!valid_port (port)) {
+ PBD::error << _("DummyBackend::get_port_name: Invalid Port(s)") << endmsg;
+ return std::string ();
+ }
+ return static_cast<DummyPort*>(port)->name ();
}
PortEngine::PortHandle
-DummyAudioBackend::get_port_by_name (const std::string&) const
+DummyAudioBackend::get_port_by_name (const std::string& name) const
{
- PortEngine::PortHandle port_handle = 0;
- return port_handle;
+ PortHandle port = (PortHandle) find_port (name);
+ return port;
}
int
DummyAudioBackend::get_ports (
const std::string& port_name_pattern,
DataType type, PortFlags flags,
- std::vector<std::string>&) const
-{
- return 0;
+ std::vector<std::string>& port_names) const
+{
+ int rv = 0;
+ regex_t port_regex;
+ bool use_regexp = false;
+ if (port_name_pattern.size () > 0) {
+ if (!regcomp (&port_regex, port_name_pattern.c_str (), REG_EXTENDED|REG_NOSUB)) {
+ use_regexp = true;
+ }
+ }
+ for (size_t i = 0; i < _ports.size (); ++i) {
+ DummyPort* port = _ports[i];
+ if ((port->type () == type) && (port->flags () & flags)) {
+ if (!use_regexp || !regexec (&port_regex, port->name ().c_str (), 0, NULL, 0)) {
+ port_names.push_back (port->name ());
+ ++rv;
+ }
+ }
+ }
+ if (use_regexp) {
+ regfree (&port_regex);
+ }
+ return rv;
}
DataType
-DummyAudioBackend::port_data_type (PortEngine::PortHandle) const
+DummyAudioBackend::port_data_type (PortEngine::PortHandle port) const
{
- return DataType::AUDIO;
+ if (!valid_port (port)) {
+ return DataType::NIL;
+ }
+ return static_cast<DummyPort*>(port)->type ();
}
PortEngine::PortHandle
DummyAudioBackend::register_port (
- const std::string&,
- ARDOUR::DataType,
- ARDOUR::PortFlags)
-{
- PortEngine::PortHandle port_handle = 0;
- return port_handle;
+ const std::string& name,
+ ARDOUR::DataType type,
+ ARDOUR::PortFlags flags)
+{
+ 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);
+}
+
+PortEngine::PortHandle
+DummyAudioBackend::add_port (
+ const std::string& name,
+ ARDOUR::DataType type,
+ ARDOUR::PortFlags flags)
+{
+ assert(name.size ());
+ if (find_port (name)) {
+ PBD::error << _("DummyBackend::register_port: Port already exists:")
+ << " (" << name << ")" << endmsg;
+ return 0;
+ }
+ DummyPort* port = NULL;
+ switch (type) {
+ case DataType::AUDIO:
+ port = new DummyAudioPort (*this, name, flags);
+ break;
+ case DataType::MIDI:
+ port = new DummyMidiPort (*this, name, flags);
+ break;
+ default:
+ PBD::error << _("DummyBackend::register_port: Invalid Data Type.") << endmsg;
+ return 0;
+ }
+
+ _ports.push_back (port);
+
+ return port;
}
void
-DummyAudioBackend::unregister_port (PortEngine::PortHandle)
+DummyAudioBackend::unregister_port (PortEngine::PortHandle port_handle)
{
+ 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));
+ if (i == _ports.end ()) {
+ PBD::error << _("DummyBackend::unregister_port: Failed to find port") << endmsg;
+ return;
+ }
+ disconnect_all(port_handle);
+ _ports.erase (i);
+ delete port;
+}
+
+int
+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 = _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 = _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 = _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, true, lr);
+ _system_outputs.push_back (static_cast<DummyAudioPort*>(p));
+ }
+
+ /* midi ports */
+ 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+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 = _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, true, lr);
+ _system_midi_out.push_back (static_cast<DummyMidiPort*>(p));
+ }
+ return 0;
+}
+
+void
+DummyAudioBackend::unregister_ports (bool system_only)
+{
+ size_t i = 0;
+ _system_inputs.clear();
+ _system_outputs.clear();
+ _system_midi_in.clear();
+ _system_midi_out.clear();
+ while (i < _ports.size ()) {
+ DummyPort* port = _ports[i];
+ if (! system_only || (port->is_physical () && port->is_terminal ())) {
+ port->disconnect_all ();
+ delete port;
+ _ports.erase (_ports.begin() + i);
+ } else {
+ ++i;
+ }
+ }
}
int
DummyAudioBackend::connect (const std::string& src, const std::string& dst)
{
- return -1;
+ DummyPort* src_port = find_port (src);
+ DummyPort* dst_port = find_port (dst);
+
+ if (!src_port) {
+ PBD::error << _("DummyBackend::connect: Invalid Source port:")
+ << " (" << src <<")" << endmsg;
+ return -1;
+ }
+ if (!dst_port) {
+ PBD::error << _("DummyBackend::connect: Invalid Destination port:")
+ << " (" << dst <<")" << endmsg;
+ return -1;
+ }
+ return src_port->connect (dst_port);
}
int
DummyAudioBackend::disconnect (const std::string& src, const std::string& dst)
{
- return -1;
+ DummyPort* src_port = find_port (src);
+ DummyPort* dst_port = find_port (dst);
+
+ if (!src_port || !dst_port) {
+ PBD::error << _("DummyBackend::disconnect: Invalid Port(s)") << endmsg;
+ return -1;
+ }
+ return src_port->disconnect (dst_port);
}
int
-DummyAudioBackend::connect (PortEngine::PortHandle, const std::string&)
+DummyAudioBackend::connect (PortEngine::PortHandle src, const std::string& dst)
{
- return -1;
+ DummyPort* dst_port = find_port (dst);
+ if (!valid_port (src)) {
+ PBD::error << _("DummyBackend::connect: Invalid Source Port Handle") << endmsg;
+ return -1;
+ }
+ if (!dst_port) {
+ PBD::error << _("DummyBackend::connect: Invalid Destination Port")
+ << " (" << dst << ")" << endmsg;
+ return -1;
+ }
+ return static_cast<DummyPort*>(src)->connect (dst_port);
}
int
-DummyAudioBackend::disconnect (PortEngine::PortHandle, const std::string&)
+DummyAudioBackend::disconnect (PortEngine::PortHandle src, const std::string& dst)
{
- return -1;
+ DummyPort* dst_port = find_port (dst);
+ if (!valid_port (src) || !dst_port) {
+ PBD::error << _("DummyBackend::disconnect: Invalid Port(s)") << endmsg;
+ return -1;
+ }
+ return static_cast<DummyPort*>(src)->disconnect (dst_port);
}
int
-DummyAudioBackend::disconnect_all (PortEngine::PortHandle)
+DummyAudioBackend::disconnect_all (PortEngine::PortHandle port)
{
- return -1;
+ if (!valid_port (port)) {
+ PBD::error << _("DummyBackend::disconnect_all: Invalid Port") << endmsg;
+ return -1;
+ }
+ static_cast<DummyPort*>(port)->disconnect_all ();
+ return 0;
}
bool
-DummyAudioBackend::connected (PortEngine::PortHandle, bool process_callback_safe)
+DummyAudioBackend::connected (PortEngine::PortHandle port, bool /* process_callback_safe*/)
{
- return false;
+ if (!valid_port (port)) {
+ PBD::error << _("DummyBackend::disconnect_all: Invalid Port") << endmsg;
+ return false;
+ }
+ return static_cast<DummyPort*>(port)->is_connected ();
}
bool
-DummyAudioBackend::connected_to (PortEngine::PortHandle, const std::string&, bool process_callback_safe)
+DummyAudioBackend::connected_to (PortEngine::PortHandle src, const std::string& dst, bool /*process_callback_safe*/)
{
- return false;
+ DummyPort* dst_port = find_port (dst);
+ if (!valid_port (src) || !dst_port) {
+ PBD::error << _("DummyBackend::connected_to: Invalid Port") << endmsg;
+ return false;
+ }
+ return static_cast<DummyPort*>(src)->is_connected (dst_port);
}
bool
-DummyAudioBackend::physically_connected (PortEngine::PortHandle, bool process_callback_safe)
+DummyAudioBackend::physically_connected (PortEngine::PortHandle port, bool /*process_callback_safe*/)
{
- return false;
+ if (!valid_port (port)) {
+ PBD::error << _("DummyBackend::physically_connected: Invalid Port") << endmsg;
+ return false;
+ }
+ return static_cast<DummyPort*>(port)->is_physically_connected ();
}
int
-DummyAudioBackend::get_connections (PortEngine::PortHandle, std::vector<std::string>&, bool process_callback_safe)
+DummyAudioBackend::get_connections (PortEngine::PortHandle port, std::vector<std::string>& names, bool /*process_callback_safe*/)
{
- return false;
+ if (!valid_port (port)) {
+ PBD::error << _("DummyBackend::get_connections: Invalid Port") << endmsg;
+ return -1;
+ }
+
+ assert (0 == names.size ());
+
+ const std::vector<DummyPort*>& connected_ports = static_cast<DummyPort*>(port)->get_connections ();
+
+ for (std::vector<DummyPort*>::const_iterator i = connected_ports.begin (); i != connected_ports.end (); ++i) {
+ names.push_back ((*i)->name ());
+ }
+
+ return (int)names.size ();
}
/* MIDI */
int
-DummyAudioBackend::midi_event_get (pframes_t& timestamp, size_t& size, uint8_t** buf, void* port_buffer, uint32_t event_index)
-{
- return -1;
+DummyAudioBackend::midi_event_get (
+ pframes_t& timestamp,
+ size_t& size, uint8_t** buf, void* port_buffer,
+ uint32_t event_index)
+{
+ assert (buf && port_buffer);
+ DummyMidiBuffer& source = * static_cast<DummyMidiBuffer*>(port_buffer);
+ if (event_index >= source.size ()) {
+ return -1;
+ }
+ DummyMidiEvent * const event = source[event_index].get ();
+
+ timestamp = event->timestamp ();
+ size = event->size ();
+ *buf = event->data ();
+ return 0;
}
int
-DummyAudioBackend::midi_event_put (void* port_buffer, pframes_t timestamp, const uint8_t* buffer, size_t size)
-{
- return -1;
+DummyAudioBackend::midi_event_put (
+ void* port_buffer,
+ pframes_t timestamp,
+ const uint8_t* buffer, size_t size)
+{
+ 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;
+ }
+ dst.push_back (boost::shared_ptr<DummyMidiEvent>(new DummyMidiEvent (timestamp, buffer, size)));
+ return 0;
}
uint32_t
DummyAudioBackend::get_midi_event_count (void* port_buffer)
{
- return -1;
+ assert (port_buffer);
+ return static_cast<DummyMidiBuffer*>(port_buffer)->size ();
}
void
DummyAudioBackend::midi_clear (void* port_buffer)
{
+ assert (port_buffer);
+ DummyMidiBuffer * buf = static_cast<DummyMidiBuffer*>(port_buffer);
+ assert (buf);
+ buf->clear ();
}
/* Monitoring */
/* Latency management */
void
-DummyAudioBackend::set_latency_range (PortEngine::PortHandle, bool for_playback, LatencyRange)
+DummyAudioBackend::set_latency_range (PortEngine::PortHandle port, bool for_playback, LatencyRange latency_range)
{
+ if (!valid_port (port)) {
+ PBD::error << _("DummyPort::set_latency_range (): invalid port.") << endmsg;
+ }
+ static_cast<DummyPort*>(port)->set_latency_range (latency_range, for_playback);
}
LatencyRange
-DummyAudioBackend::get_latency_range (PortEngine::PortHandle, bool for_playback)
+DummyAudioBackend::get_latency_range (PortEngine::PortHandle port, bool for_playback)
{
LatencyRange r;
- r.min = 0;
- r.max = 0;
+ if (!valid_port (port)) {
+ PBD::error << _("DummyPort::get_latency_range (): invalid port.") << endmsg;
+ r.min = 0;
+ r.max = 0;
+ return r;
+ }
+ 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 */
bool
-DummyAudioBackend::port_is_physical (PortEngine::PortHandle) const
+DummyAudioBackend::port_is_physical (PortEngine::PortHandle port) const
{
- return false;
+ if (!valid_port (port)) {
+ PBD::error << _("DummyPort::port_is_physical (): invalid port.") << endmsg;
+ return false;
+ }
+ return static_cast<DummyPort*>(port)->is_physical ();
}
void
-DummyAudioBackend::get_physical_outputs (DataType type, std::vector<std::string>&)
+DummyAudioBackend::get_physical_outputs (DataType type, std::vector<std::string>& port_names)
{
+ for (size_t i = 0; i < _ports.size (); ++i) {
+ DummyPort* port = _ports[i];
+ if ((port->type () == type) && port->is_input () && port->is_physical ()) {
+ port_names.push_back (port->name ());
+ }
+ }
}
void
-DummyAudioBackend::get_physical_inputs (DataType type, std::vector<std::string>&)
+DummyAudioBackend::get_physical_inputs (DataType type, std::vector<std::string>& port_names)
{
+ for (size_t i = 0; i < _ports.size (); ++i) {
+ DummyPort* port = _ports[i];
+ if ((port->type () == type) && port->is_output () && port->is_physical ()) {
+ port_names.push_back (port->name ());
+ }
+ }
}
ChanCount
DummyAudioBackend::n_physical_outputs () const
{
+ int n_midi = 0;
+ int n_audio = 0;
+ for (size_t i = 0; i < _ports.size (); ++i) {
+ DummyPort* port = _ports[i];
+ if (port->is_output () && port->is_physical ()) {
+ switch (port->type ()) {
+ case DataType::AUDIO: ++n_audio; break;
+ case DataType::MIDI: ++n_midi; break;
+ default: break;
+ }
+ }
+ }
ChanCount cc;
- cc.set (DataType::AUDIO, 0);
- cc.set (DataType::MIDI, 0);
+ cc.set (DataType::AUDIO, n_audio);
+ cc.set (DataType::MIDI, n_midi);
return cc;
}
ChanCount
DummyAudioBackend::n_physical_inputs () const
{
+ int n_midi = 0;
+ int n_audio = 0;
+ for (size_t i = 0; i < _ports.size (); ++i) {
+ DummyPort* port = _ports[i];
+ if (port->is_input () && port->is_physical ()) {
+ switch (port->type ()) {
+ case DataType::AUDIO: ++n_audio; break;
+ case DataType::MIDI: ++n_midi; break;
+ default: break;
+ }
+ }
+ }
ChanCount cc;
- cc.set (DataType::AUDIO, 0);
- cc.set (DataType::MIDI, 0);
+ cc.set (DataType::AUDIO, n_audio);
+ cc.set (DataType::MIDI, n_midi);
return cc;
}
/* Getting access to the data buffer for a port */
void*
-DummyAudioBackend::get_buffer (PortEngine::PortHandle, pframes_t)
-{
+DummyAudioBackend::get_buffer (PortEngine::PortHandle port, pframes_t nframes)
+{
+ assert (port);
+ assert (valid_port (port));
+ return static_cast<DummyPort*>(port)->get_buffer (nframes);
+}
+
+/* Engine Process */
+void *
+DummyAudioBackend::main_process_thread ()
+{
+ AudioEngine::thread_init_callback (this);
+ _running = true;
+ _processed_samples = 0;
+
+ manager.registration_callback();
+ manager.graph_order_callback();
+
+ int64_t clock1, clock2;
+ clock1 = _x_get_monotonic_usec();
+ 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 (_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) {
+ const int64_t nomial_time = 1e6 * _samples_per_period / _samplerate;
+ clock2 = _x_get_monotonic_usec();
+#ifdef PLATFORM_WINDOWS
+ bool win_timers_ok = true;
+ /* querying the performance counter can fail occasionally (-1).
+ * Also on some multi-core systems, timers are CPU specific and not
+ * synchronized. We assume they differ more than a few milliseconds
+ * (4 * nominal cycle time) and simply ignore cases where the
+ * execution switches cores.
+ */
+ if (clock1 < 0 || clock2 < 0 || (clock1 > clock2) || (clock2 - clock1) > 4 * nomial_time) {
+ clock2 = clock1 = 0;
+ win_timers_ok = false;
+ }
+#endif
+ const int64_t elapsed_time = clock2 - clock1;
+#ifdef PLATFORM_WINDOWS
+ if (win_timers_ok)
+#endif
+ { // low pass filter
+ _dsp_load = _dsp_load + .05 * ((elapsed_time / (float) nomial_time) - _dsp_load) + 1e-12;
+ }
+
+ if (elapsed_time < nomial_time) {
+ Glib::usleep (nomial_time - elapsed_time);
+ } else {
+ Glib::usleep (100); // don't hog cpu
+ }
+ } else {
+ _dsp_load = 1.0f;
+ Glib::usleep (100); // don't hog cpu
+ }
+
+ /* beginning of netx 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();
+ }
+ 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 boost::shared_ptr<DummyAudioBackend> _instance;
+static boost::shared_ptr<AudioBackend> backend_factory (AudioEngine& e);
+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",
+ instantiate,
+ deinstantiate,
+ backend_factory,
+ already_configured,
+ available
+};
+
static boost::shared_ptr<AudioBackend>
backend_factory (AudioEngine& e)
{
if (!_instance) {
- _instance.reset (new DummyAudioBackend (e));
+ _instance.reset (new DummyAudioBackend (e, _descriptor));
}
return _instance;
}
instantiate (const std::string& arg1, const std::string& /* arg2 */)
{
s_instance_name = arg1;
+#ifdef PLATFORM_WINDOWS
+ LARGE_INTEGER Frequency;
+ if (!QueryPerformanceFrequency(&Frequency) || Frequency.QuadPart < 1) {
+ _win_pc_rate = 0;
+ } else {
+ _win_pc_rate = 1000000.0 / Frequency.QuadPart;
+ }
+#endif
return 0;
}
static bool
already_configured ()
{
+ if (_instance) {
+ return _instance->is_running();
+ }
return false;
}
-static ARDOUR::AudioBackendInfo _descriptor = {
- "Dummy",
- instantiate,
- deinstantiate,
- backend_factory,
- already_configured,
-};
+static bool
+available ()
+{
+ return true;
+}
extern "C" ARDOURBACKEND_API ARDOUR::AudioBackendInfo* descriptor ()
{
return &_descriptor;
}
+
+
+/******************************************************************************/
+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();
+}
+
+
+int DummyPort::connect (DummyPort *port)
+{
+ if (!port) {
+ PBD::error << _("DummyPort::connect (): invalid (null) port") << endmsg;
+ return -1;
+ }
+
+ if (type () != port->type ()) {
+ PBD::error << _("DummyPort::connect (): wrong port-type") << endmsg;
+ return -1;
+ }
+
+ if (is_output () && port->is_output ()) {
+ PBD::error << _("DummyPort::connect (): cannot inter-connect output ports.") << endmsg;
+ return -1;
+ }
+
+ if (is_input () && port->is_input ()) {
+ PBD::error << _("DummyPort::connect (): cannot inter-connect input ports.") << endmsg;
+ return -1;
+ }
+
+ if (this == port) {
+ PBD::error << _("DummyPort::connect (): cannot self-connect ports.") << endmsg;
+ return -1;
+ }
+
+ if (is_connected (port)) {
+#if 0 // don't bother to warn about this for now. just ignore it
+ PBD::error << _("DummyPort::connect (): ports are already connected:")
+ << " (" << name () << ") -> (" << port->name () << ")"
+ << endmsg;
+#endif
+ return -1;
+ }
+
+ _connect (port, true);
+ return 0;
+}
+
+
+void DummyPort::_connect (DummyPort *port, bool callback)
+{
+ _connections.push_back (port);
+ if (callback) {
+ port->_connect (this, false);
+ _dummy_backend.port_connect_callback (name(), port->name(), true);
+ }
+}
+
+int DummyPort::disconnect (DummyPort *port)
+{
+ if (!port) {
+ PBD::error << _("DummyPort::disconnect (): invalid (null) port") << endmsg;
+ return -1;
+ }
+
+ if (!is_connected (port)) {
+ PBD::error << _("DummyPort::disconnect (): ports are not connected:")
+ << " (" << name () << ") -> (" << port->name () << ")"
+ << endmsg;
+ return -1;
+ }
+ _disconnect (port, true);
+ return 0;
+}
+
+void DummyPort::_disconnect (DummyPort *port, bool callback)
+{
+ std::vector<DummyPort*>::iterator it = std::find (_connections.begin (), _connections.end (), port);
+
+ assert (it != _connections.end ());
+
+ _connections.erase (it);
+
+ if (callback) {
+ port->_disconnect (this, false);
+ _dummy_backend.port_connect_callback (name(), port->name(), false);
+ }
+}
+
+
+void DummyPort::disconnect_all ()
+{
+ while (!_connections.empty ()) {
+ _connections.back ()->_disconnect (this, false);
+ _dummy_backend.port_connect_callback (name(), _connections.back ()->name(), false);
+ _connections.pop_back ();
+ }
+}
+
+bool
+DummyPort::is_connected (const DummyPort *port) const
+{
+ return std::find (_connections.begin (), _connections.end (), port) != _connections.end ();
+}
+
+bool DummyPort::is_physically_connected () const
+{
+ for (std::vector<DummyPort*>::const_iterator it = _connections.begin (); it != _connections.end (); ++it) {
+ if ((*it)->is_physical ()) {
+ return true;
+ }
+ }
+ 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;
+}
+
+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 (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 () {
+ 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 - 1.0);
+ _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 (is_input ()) {
+ std::vector<DummyPort*>::const_iterator it = get_connections ().begin ();
+ if (it == get_connections ().end ()) {
+ memset (_buffer, 0, n_samples * sizeof (Sample));
+ } else {
+ 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<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()) {
+ if (!_gen_cycle) {
+ generate(n_samples);
+ }
+ }
+ return _buffer;
+}
+
+
+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;
+}
+
+
+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) {
+ 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 (), MidiEventSorter());
+ } else if (is_output () && is_physical () && is_terminal()) {
+ if (!_gen_cycle) {
+ midi_generate(n_samples);
+ }
+ }
+ return &_buffer;
+}
+
+DummyMidiEvent::DummyMidiEvent (const pframes_t timestamp, const uint8_t* data, size_t size)
+ : _size (size)
+ , _timestamp (timestamp)
+ , _data (0)
+{
+ if (size > 0) {
+ _data = (uint8_t*) malloc (size);
+ memcpy (_data, data, size);
+ }
+}
+
+DummyMidiEvent::DummyMidiEvent (const DummyMidiEvent& other)
+ : _size (other.size ())
+ , _timestamp (other.timestamp ())
+ , _data (0)
+{
+ if (other.size () && other.const_data ()) {
+ _data = (uint8_t*) malloc (other.size ());
+ memcpy (_data, other.const_data (), other.size ());
+ }
+};
+
+DummyMidiEvent::~DummyMidiEvent () {
+ free (_data);
+};
projects / ardour.git / blobdiff