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ardour/libs/ardour/audioengine.cc

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/*
Copyright (C) 2002 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.
*/
#include <unistd.h>
#include <cerrno>
#include <vector>
#include <exception>
#include <stdexcept>
#include <sstream>
#include <glibmm/timer.h>
#include "pbd/pthread_utils.h"
#include "pbd/stacktrace.h"
#include "pbd/unknown_type.h"
#include "midi++/jack.h"
#include "ardour/amp.h"
#include "ardour/audio_port.h"
#include "ardour/audioengine.h"
#include "ardour/buffer.h"
#include "ardour/buffer_set.h"
#include "ardour/cycle_timer.h"
#include "ardour/delivery.h"
#include "ardour/event_type_map.h"
#include "ardour/internal_return.h"
#include "ardour/io.h"
#include "ardour/meter.h"
#include "ardour/midi_port.h"
#include "ardour/port.h"
#include "ardour/port_set.h"
#include "ardour/session.h"
#include "ardour/timestamps.h"
#include "ardour/utils.h"
#include "i18n.h"
using namespace std;
using namespace ARDOUR;
using namespace PBD;
gint AudioEngine::m_meter_exit;
AudioEngine* AudioEngine::_instance = 0;
#define GET_PRIVATE_JACK_POINTER(j) jack_client_t* _priv_jack = (jack_client_t*) (j); if (!_priv_jack) { return; }
#define GET_PRIVATE_JACK_POINTER_RET(j,r) jack_client_t* _priv_jack = (jack_client_t*) (j); if (!_priv_jack) { return r; }
AudioEngine::AudioEngine (string client_name)
: ports (new Ports)
{
_instance = this; /* singleton */
session_remove_pending = false;
_running = false;
_has_run = false;
last_monitor_check = 0;
monitor_check_interval = max_frames;
_processed_frames = 0;
_usecs_per_cycle = 0;
_jack = 0;
_frame_rate = 0;
_buffer_size = 0;
_freewheeling = false;
m_meter_thread = 0;
g_atomic_int_set (&m_meter_exit, 0);
if (connect_to_jack (client_name)) {
throw NoBackendAvailable ();
}
Port::set_engine (this);
// Initialize parameter metadata (e.g. ranges)
Evoral::Parameter p(NullAutomation);
p = EventTypeMap::instance().new_parameter(NullAutomation);
p = EventTypeMap::instance().new_parameter(GainAutomation);
p = EventTypeMap::instance().new_parameter(PanAutomation);
p = EventTypeMap::instance().new_parameter(PluginAutomation);
p = EventTypeMap::instance().new_parameter(SoloAutomation);
p = EventTypeMap::instance().new_parameter(MuteAutomation);
p = EventTypeMap::instance().new_parameter(MidiCCAutomation);
p = EventTypeMap::instance().new_parameter(MidiPgmChangeAutomation);
p = EventTypeMap::instance().new_parameter(MidiPitchBenderAutomation);
p = EventTypeMap::instance().new_parameter(MidiChannelPressureAutomation);
p = EventTypeMap::instance().new_parameter(FadeInAutomation);
p = EventTypeMap::instance().new_parameter(FadeOutAutomation);
p = EventTypeMap::instance().new_parameter(EnvelopeAutomation);
p = EventTypeMap::instance().new_parameter(MidiCCAutomation);
}
AudioEngine::~AudioEngine ()
{
{
Glib::Mutex::Lock tm (_process_lock);
session_removed.signal ();
if (_running) {
jack_client_close (_jack);
_jack = 0;
}
stop_metering_thread ();
}
}
jack_client_t*
AudioEngine::jack() const
{
return _jack;
}
void
_thread_init_callback (void * /*arg*/)
{
/* make sure that anybody who needs to know about this thread
knows about it.
*/
pthread_set_name (X_("audioengine"));
PBD::notify_gui_about_thread_creation ("gui", pthread_self(), X_("Audioengine"), 4096);
PBD::notify_gui_about_thread_creation ("midiui", pthread_self(), X_("Audioengine"), 128);
SessionEvent::create_per_thread_pool (X_("Audioengine"), 512);
MIDI::JACK_MidiPort::set_process_thread (pthread_self());
}
static void
ardour_jack_error (const char* msg)
{
error << "JACK: " << msg << endmsg;
}
int
AudioEngine::start ()
{
GET_PRIVATE_JACK_POINTER_RET (_jack, -1);
if (!_running) {
nframes_t blocksize = jack_get_buffer_size (_priv_jack);
if (_session) {
BootMessage (_("Connect session to engine"));
_session->set_block_size (blocksize);
_session->set_frame_rate (jack_get_sample_rate (_priv_jack));
/* page in as much of the session process code as we
can before we really start running.
*/
_session->process (blocksize);
_session->process (blocksize);
_session->process (blocksize);
_session->process (blocksize);
_session->process (blocksize);
_session->process (blocksize);
_session->process (blocksize);
_session->process (blocksize);
}
_processed_frames = 0;
last_monitor_check = 0;
jack_on_shutdown (_priv_jack, halted, this);
jack_set_graph_order_callback (_priv_jack, _graph_order_callback, this);
jack_set_thread_init_callback (_priv_jack, _thread_init_callback, this);
jack_set_process_callback (_priv_jack, _process_callback, this);
jack_set_sample_rate_callback (_priv_jack, _sample_rate_callback, this);
jack_set_buffer_size_callback (_priv_jack, _bufsize_callback, this);
jack_set_xrun_callback (_priv_jack, _xrun_callback, this);
jack_set_sync_callback (_priv_jack, _jack_sync_callback, this);
jack_set_freewheel_callback (_priv_jack, _freewheel_callback, this);
jack_set_port_registration_callback (_priv_jack, _registration_callback, this);
if (_session && _session->config.get_jack_time_master()) {
jack_set_timebase_callback (_priv_jack, 0, _jack_timebase_callback, this);
}
jack_set_error_function (ardour_jack_error);
if (jack_activate (_priv_jack) == 0) {
_running = true;
_has_run = true;
Running(); /* EMIT SIGNAL */
} else {
// error << _("cannot activate JACK client") << endmsg;
}
_raw_buffer_sizes[DataType::AUDIO] = blocksize * sizeof(float);
}
return _running ? 0 : -1;
}
int
AudioEngine::stop (bool forever)
{
GET_PRIVATE_JACK_POINTER_RET (_jack, -1);
if (_priv_jack) {
if (forever) {
disconnect_from_jack ();
} else {
jack_deactivate (_priv_jack);
Stopped(); /* EMIT SIGNAL */
MIDI::JACK_MidiPort::JackHalted (); /* EMIT SIGNAL */
}
}
return _running ? -1 : 0;
}
bool
AudioEngine::get_sync_offset (nframes_t& offset) const
{
#ifdef HAVE_JACK_VIDEO_SUPPORT
GET_PRIVATE_JACK_POINTER_RET (_jack, false);
jack_position_t pos;
if (_priv_jack) {
(void) jack_transport_query (_priv_jack, &pos);
if (pos.valid & JackVideoFrameOffset) {
offset = pos.video_offset;
return true;
}
}
#else
/* keep gcc happy */
offset = 0;
#endif
return false;
}
void
AudioEngine::_jack_timebase_callback (jack_transport_state_t state, nframes_t nframes,
jack_position_t* pos, int new_position, void *arg)
{
static_cast<AudioEngine*> (arg)->jack_timebase_callback (state, nframes, pos, new_position);
}
void
AudioEngine::jack_timebase_callback (jack_transport_state_t state, nframes_t nframes,
jack_position_t* pos, int new_position)
{
if (_jack && _session && _session->synced_to_jack()) {
_session->jack_timebase_callback (state, nframes, pos, new_position);
}
}
int
AudioEngine::_jack_sync_callback (jack_transport_state_t state, jack_position_t* pos, void* arg)
{
return static_cast<AudioEngine*> (arg)->jack_sync_callback (state, pos);
}
int
AudioEngine::jack_sync_callback (jack_transport_state_t state, jack_position_t* pos)
{
if (_jack && _session) {
return _session->jack_sync_callback (state, pos);
}
return true;
}
int
AudioEngine::_xrun_callback (void *arg)
{
AudioEngine* ae = static_cast<AudioEngine*> (arg);
if (ae->connected()) {
ae->Xrun (); /* EMIT SIGNAL */
}
return 0;
}
int
AudioEngine::_graph_order_callback (void *arg)
{
AudioEngine* ae = static_cast<AudioEngine*> (arg);
if (ae->connected()) {
ae->GraphReordered (); /* EMIT SIGNAL */
}
return 0;
}
/** Wrapped which is called by JACK as its process callback. It is just
* here to get us back into C++ land by calling AudioEngine::process_callback()
* @param nframes Number of frames passed by JACK.
* @param arg User argument passed by JACK, which will be the AudioEngine*.
*/
int
AudioEngine::_process_callback (nframes_t nframes, void *arg)
{
return static_cast<AudioEngine *> (arg)->process_callback (nframes);
}
void
AudioEngine::_freewheel_callback (int onoff, void *arg)
{
static_cast<AudioEngine*>(arg)->_freewheeling = onoff;
}
void
AudioEngine::_registration_callback (jack_port_id_t /*id*/, int /*reg*/, void* arg)
{
AudioEngine* ae = static_cast<AudioEngine*> (arg);
ae->PortRegisteredOrUnregistered (); /* EMIT SIGNAL */
}
void
AudioEngine::split_cycle (nframes_t offset)
{
/* caller must hold process lock */
Port::increment_port_offset (offset);
/* tell all Ports that we're going to start a new (split) cycle */
boost::shared_ptr<Ports> p = ports.reader();
for (Ports::iterator i = p->begin(); i != p->end(); ++i) {
(*i)->cycle_split ();
}
}
/** Method called by JACK (via _process_callback) which says that there
* is work to be done.
* @param nframes Number of frames to process.
*/
int
AudioEngine::process_callback (nframes_t nframes)
{
GET_PRIVATE_JACK_POINTER_RET(_jack,0)
// CycleTimer ct ("AudioEngine::process");
Glib::Mutex::Lock tm (_process_lock, Glib::TRY_LOCK);
/// The number of frames that will have been processed when we've finished
nframes_t next_processed_frames;
/* handle wrap around of total frames counter */
if (max_frames - _processed_frames < nframes) {
next_processed_frames = nframes - (max_frames - _processed_frames);
} else {
next_processed_frames = _processed_frames + nframes;
}
if (!tm.locked() || _session == 0) {
/* return having done nothing */
_processed_frames = next_processed_frames;
return 0;
}
if (session_remove_pending) {
/* perform the actual session removal */
_session = 0;
session_remove_pending = false;
session_removed.signal();
_processed_frames = next_processed_frames;
return 0;
}
/* tell all relevant objects that we're starting a new cycle */
Delivery::CycleStart (nframes);
Port::set_port_offset (0);
InternalReturn::CycleStart (nframes);
/* tell all Ports that we're starting a new cycle */
boost::shared_ptr<Ports> p = ports.reader();
for (Ports::iterator i = p->begin(); i != p->end(); ++i) {
(*i)->cycle_start (nframes);
}
if (_freewheeling) {
/* emit the Freewheel signal and stop freewheeling in the event of trouble
* the indirection is to pick up the return value of the signal.
*/
if (*Freewheel (nframes)) {
jack_set_freewheel (_priv_jack, false);
}
} else {
if (_session) {
_session->process (nframes);
}
}
if (_freewheeling) {
return 0;
}
if (!_running) {
_processed_frames = next_processed_frames;
return 0;
}
if (last_monitor_check + monitor_check_interval < next_processed_frames) {
boost::shared_ptr<Ports> p = ports.reader();
for (Ports::iterator i = p->begin(); i != p->end(); ++i) {
Port *port = (*i);
bool x;
if (port->_last_monitor != (x = port->monitoring_input ())) {
port->_last_monitor = x;
/* XXX I think this is dangerous, due to
a likely mutex in the signal handlers ...
*/
port->MonitorInputChanged (x); /* EMIT SIGNAL */
}
}
last_monitor_check = next_processed_frames;
}
if (_session->silent()) {
boost::shared_ptr<Ports> p = ports.reader();
for (Ports::iterator i = p->begin(); i != p->end(); ++i) {
Port *port = (*i);
if (port->sends_output()) {
port->get_buffer(nframes).silence(nframes);
}
}
}
// Finalize ports
for (Ports::iterator i = p->begin(); i != p->end(); ++i) {
(*i)->cycle_end (nframes);
}
_processed_frames = next_processed_frames;
return 0;
}
int
AudioEngine::_sample_rate_callback (nframes_t nframes, void *arg)
{
return static_cast<AudioEngine *> (arg)->jack_sample_rate_callback (nframes);
}
int
AudioEngine::jack_sample_rate_callback (nframes_t nframes)
{
_frame_rate = nframes;
_usecs_per_cycle = (int) floor ((((double) frames_per_cycle() / nframes)) * 1000000.0);
/* check for monitor input change every 1/10th of second */
monitor_check_interval = nframes / 10;
last_monitor_check = 0;
if (_session) {
_session->set_frame_rate (nframes);
}
SampleRateChanged (nframes); /* EMIT SIGNAL */
return 0;
}
int
AudioEngine::_bufsize_callback (nframes_t nframes, void *arg)
{
return static_cast<AudioEngine *> (arg)->jack_bufsize_callback (nframes);
}
int
AudioEngine::jack_bufsize_callback (nframes_t nframes)
{
_buffer_size = nframes;
_raw_buffer_sizes[DataType::AUDIO] = nframes * sizeof(float);
cout << "FIXME: Assuming maximum MIDI buffer size " << nframes * 4 << "bytes" << endl;
_raw_buffer_sizes[DataType::MIDI] = nframes * 4;
_usecs_per_cycle = (int) floor ((((double) nframes / frame_rate())) * 1000000.0);
last_monitor_check = 0;
boost::shared_ptr<Ports> p = ports.reader();
for (Ports::iterator i = p->begin(); i != p->end(); ++i) {
(*i)->reset();
}
if (_session) {
_session->set_block_size (_buffer_size);
}
return 0;
}
void
AudioEngine::stop_metering_thread ()
{
if (m_meter_thread) {
g_atomic_int_set (&m_meter_exit, 1);
m_meter_thread->join ();
m_meter_thread = 0;
}
}
void
AudioEngine::start_metering_thread ()
{
if (m_meter_thread == 0) {
g_atomic_int_set (&m_meter_exit, 0);
m_meter_thread = Glib::Thread::create (boost::bind (&AudioEngine::meter_thread, this),
500000, true, true, Glib::THREAD_PRIORITY_NORMAL);
}
}
void
AudioEngine::meter_thread ()
{
pthread_set_name (X_("meter"));
while (true) {
Glib::usleep (10000); /* 1/100th sec interval */
if (g_atomic_int_get(&m_meter_exit)) {
break;
}
Metering::Meter ();
}
}
void
AudioEngine::set_session (Session *s)
{
Glib::Mutex::Lock pl (_process_lock);
SessionHandlePtr::set_session (s);
if (_session) {
start_metering_thread ();
nframes_t blocksize = jack_get_buffer_size (_jack);
/* page in as much of the session process code as we
can before we really start running.
*/
boost::shared_ptr<Ports> p = ports.reader();
for (Ports::iterator i = p->begin(); i != p->end(); ++i) {
(*i)->cycle_start (blocksize);
}
_session->process (blocksize);
_session->process (blocksize);
_session->process (blocksize);
_session->process (blocksize);
_session->process (blocksize);
_session->process (blocksize);
_session->process (blocksize);
_session->process (blocksize);
for (Ports::iterator i = p->begin(); i != p->end(); ++i) {
(*i)->cycle_end (blocksize);
}
}
}
void
AudioEngine::remove_session ()
{
Glib::Mutex::Lock lm (_process_lock);
if (_running) {
stop_metering_thread ();
if (_session) {
session_remove_pending = true;
session_removed.wait(_process_lock);
}
} else {
SessionHandlePtr::set_session (0);
}
remove_all_ports ();
}
void
AudioEngine::port_registration_failure (const std::string& portname)
{
GET_PRIVATE_JACK_POINTER (_jack);
string full_portname = jack_client_name;
full_portname += ':';
full_portname += portname;
jack_port_t* p = jack_port_by_name (_priv_jack, full_portname.c_str());
string reason;
if (p) {
reason = string_compose (_("a port with the name \"%1\" already exists: check for duplicated track/bus names"), portname);
} else {
reason = string_compose (_("No more JACK ports are available. You will need to stop %1 and restart JACK with ports if you need this many tracks."), PROGRAM_NAME);
}
throw PortRegistrationFailure (string_compose (_("AudioEngine: cannot register port \"%1\": %2"), portname, reason).c_str());
}
Port *
AudioEngine::register_port (DataType dtype, const string& portname, bool input)
{
Port* newport = 0;
try {
if (dtype == DataType::AUDIO) {
newport = new AudioPort (portname, (input ? Port::IsInput : Port::IsOutput));
} else if (dtype == DataType::MIDI) {
newport = new MidiPort (portname, (input ? Port::IsInput : Port::IsOutput));
} else {
throw PortRegistrationFailure("unable to create port (unknown type)");
}
size_t& old_buffer_size = _raw_buffer_sizes[newport->type()];
size_t port_buffer_size = newport->raw_buffer_size(0);
if (port_buffer_size > old_buffer_size) {
old_buffer_size = port_buffer_size;
}
RCUWriter<Ports> writer (ports);
boost::shared_ptr<Ports> ps = writer.get_copy ();
ps->insert (ps->begin(), newport);
/* writer goes out of scope, forces update */
return newport;
}
catch (PortRegistrationFailure& err) {
throw err;
} catch (std::exception& e) {
throw PortRegistrationFailure(string_compose(
_("unable to create port: %1"), e.what()).c_str());
} catch (...) {
throw PortRegistrationFailure("unable to create port (unknown error)");
}
}
Port *
AudioEngine::register_input_port (DataType type, const string& portname)
{
return register_port (type, portname, true);
}
Port *
AudioEngine::register_output_port (DataType type, const string& portname)
{
return register_port (type, portname, false);
}
int
AudioEngine::unregister_port (Port& port)
{
/* caller must hold process lock */
if (!_running) {
/* probably happening when the engine has been halted by JACK,
in which case, there is nothing we can do here.
*/
return 0;
}
{
RCUWriter<Ports> writer (ports);
boost::shared_ptr<Ports> ps = writer.get_copy ();
for (Ports::iterator i = ps->begin(); i != ps->end(); ++i) {
if ((*i) == &port) {
delete *i;
ps->erase (i);
break;
}
}
/* writer goes out of scope, forces update */
}
return 0;
}
int
AudioEngine::connect (const string& source, const string& destination)
{
/* caller must hold process lock */
int ret;
if (!_running) {
if (!_has_run) {
fatal << _("connect called before engine was started") << endmsg;
/*NOTREACHED*/
} else {
return -1;
}
}
string s = make_port_name_non_relative (source);
string d = make_port_name_non_relative (destination);
Port* src = get_port_by_name_locked (s);
Port* dst = get_port_by_name_locked (d);
if (src) {
ret = src->connect (d);
} else if (dst) {
ret = dst->connect (s);
} else {
/* neither port is known to us, and this API isn't intended for use as a general patch bay */
ret = -1;
}
if (ret > 0) {
/* already exists - no error, no warning */
} else if (ret < 0) {
error << string_compose(_("AudioEngine: cannot connect %1 (%2) to %3 (%4)"),
source, s, destination, d)
<< endmsg;
}
return ret;
}
int
AudioEngine::disconnect (const string& source, const string& destination)
{
/* caller must hold process lock */
int ret;
if (!_running) {
if (!_has_run) {
fatal << _("disconnect called before engine was started") << endmsg;
/*NOTREACHED*/
} else {
return -1;
}
}
string s = make_port_name_non_relative (source);
string d = make_port_name_non_relative (destination);
Port* src = get_port_by_name_locked (s);
Port* dst = get_port_by_name_locked (d);
if (src) {
ret = src->disconnect (d);
} else if (dst) {
ret = dst->disconnect (s);
} else {
/* neither port is known to us, and this API isn't intended for use as a general patch bay */
ret = -1;
}
return ret;
}
int
AudioEngine::disconnect (Port& port)
{
GET_PRIVATE_JACK_POINTER_RET (_jack,-1);
if (!_running) {
if (!_has_run) {
fatal << _("disconnect called before engine was started") << endmsg;
/*NOTREACHED*/
} else {
return -1;
}
}
return port.disconnect_all ();
}
ARDOUR::nframes_t
AudioEngine::frame_rate () const
{
GET_PRIVATE_JACK_POINTER_RET (_jack,0);
if (_frame_rate == 0) {
return (_frame_rate = jack_get_sample_rate (_priv_jack));
} else {
return _frame_rate;
}
}
size_t
AudioEngine::raw_buffer_size (DataType t)
{
std::map<DataType,size_t>::const_iterator s = _raw_buffer_sizes.find(t);
return (s != _raw_buffer_sizes.end()) ? s->second : 0;
}
ARDOUR::nframes_t
AudioEngine::frames_per_cycle () const
{
GET_PRIVATE_JACK_POINTER_RET (_jack,0);
if (_buffer_size == 0) {
return (_buffer_size = jack_get_buffer_size (_jack));
} else {
return _buffer_size;
}
}
/** @param name Full name of port (including prefix:)
* @return Corresponding Port*, or 0. This object remains the property of the AudioEngine
* so must not be deleted.
*/
Port *
AudioEngine::get_port_by_name (const string& portname)
{
string s;
if (portname.find_first_of (':') == string::npos) {
s = make_port_name_non_relative (portname);
} else {
s = portname;
}
Glib::Mutex::Lock lm (_process_lock);
return get_port_by_name_locked (s);
}
Port *
AudioEngine::get_port_by_name_locked (const string& portname)
{
/* caller must hold process lock */
if (!_running) {
if (!_has_run) {
fatal << _("get_port_by_name_locked() called before engine was started") << endmsg;
/*NOTREACHED*/
} else {
return 0;
}
}
if (portname.substr (0, jack_client_name.length ()) != jack_client_name) {
/* not an ardour: port */
return 0;
}
std::string const rel = make_port_name_relative (portname);
boost::shared_ptr<Ports> pr = ports.reader();
for (Ports::iterator i = pr->begin(); i != pr->end(); ++i) {
if (rel == (*i)->name()) {
return *i;
}
}
return 0;
}
const char **
AudioEngine::get_ports (const string& port_name_pattern, const string& type_name_pattern, uint32_t flags)
{
GET_PRIVATE_JACK_POINTER_RET (_jack,0);
if (!_running) {
if (!_has_run) {
fatal << _("get_ports called before engine was started") << endmsg;
/*NOTREACHED*/
} else {
return 0;
}
}
return jack_get_ports (_priv_jack, port_name_pattern.c_str(), type_name_pattern.c_str(), flags);
}
void
AudioEngine::halted (void *arg)
{
/* called from jack shutdown handler */
AudioEngine* ae = static_cast<AudioEngine *> (arg);
bool was_running = ae->_running;
ae->stop_metering_thread ();
ae->_running = false;
ae->_buffer_size = 0;
ae->_frame_rate = 0;
if (was_running) {
ae->Halted(); /* EMIT SIGNAL */
MIDI::JACK_MidiPort::JackHalted (); /* EMIT SIGNAL */
}
}
void
AudioEngine::died ()
{
/* called from a signal handler for SIGPIPE */
stop_metering_thread ();
_running = false;
_buffer_size = 0;
_frame_rate = 0;
_jack = 0;
}
bool
AudioEngine::can_request_hardware_monitoring ()
{
GET_PRIVATE_JACK_POINTER_RET (_jack,false);
const char ** ports;
if ((ports = jack_get_ports (_priv_jack, NULL, JACK_DEFAULT_AUDIO_TYPE, JackPortCanMonitor)) == 0) {
return false;
}
free (ports);
return true;
}
uint32_t
AudioEngine::n_physical_outputs (DataType type) const
{
GET_PRIVATE_JACK_POINTER_RET (_jack,0);
const char ** ports;
uint32_t i = 0;
if ((ports = jack_get_ports (_priv_jack, NULL, type.to_jack_type(), JackPortIsPhysical|JackPortIsInput)) == 0) {
return 0;
}
for (i = 0; ports[i]; ++i) {}
free (ports);
return i;
}
uint32_t
AudioEngine::n_physical_inputs (DataType type) const
{
GET_PRIVATE_JACK_POINTER_RET (_jack,0);
const char ** ports;
uint32_t i = 0;
if ((ports = jack_get_ports (_priv_jack, NULL, type.to_jack_type(), JackPortIsPhysical|JackPortIsOutput)) == 0) {
return 0;
}
for (i = 0; ports[i]; ++i) {}
free (ports);
return i;
}
void
AudioEngine::get_physical_inputs (DataType type, vector<string>& ins)
{
GET_PRIVATE_JACK_POINTER (_jack);
const char ** ports;
if ((ports = jack_get_ports (_priv_jack, NULL, type.to_jack_type(), JackPortIsPhysical|JackPortIsOutput)) == 0) {
return;
}
if (ports) {
for (uint32_t i = 0; ports[i]; ++i) {
ins.push_back (ports[i]);
}
free (ports);
}
}
void
AudioEngine::get_physical_outputs (DataType type, vector<string>& outs)
{
GET_PRIVATE_JACK_POINTER (_jack);
const char ** ports;
uint32_t i = 0;
if ((ports = jack_get_ports (_priv_jack, NULL, type.to_jack_type(), JackPortIsPhysical|JackPortIsInput)) == 0) {
return;
}
for (i = 0; ports[i]; ++i) {
outs.push_back (ports[i]);
}
free (ports);
}
string
AudioEngine::get_nth_physical (DataType type, uint32_t n, int flag)
{
GET_PRIVATE_JACK_POINTER_RET (_jack,"");
const char ** ports;
uint32_t i;
string ret;
assert(type != DataType::NIL);
if ((ports = jack_get_ports (_priv_jack, NULL, type.to_jack_type(), JackPortIsPhysical|flag)) == 0) {
return ret;
}
for (i = 0; i < n && ports[i]; ++i) {}
if (ports[i]) {
ret = ports[i];
}
free ((const char **) ports);
return ret;
}
void
AudioEngine::update_total_latency (const Port& port)
{
port.recompute_total_latency ();
}
void
AudioEngine::transport_stop ()
{
GET_PRIVATE_JACK_POINTER (_jack);
jack_transport_stop (_priv_jack);
}
void
AudioEngine::transport_start ()
{
GET_PRIVATE_JACK_POINTER (_jack);
jack_transport_start (_priv_jack);
}
void
AudioEngine::transport_locate (nframes_t where)
{
GET_PRIVATE_JACK_POINTER (_jack);
// cerr << "tell JACK to locate to " << where << endl;
jack_transport_locate (_priv_jack, where);
}
AudioEngine::TransportState
AudioEngine::transport_state ()
{
GET_PRIVATE_JACK_POINTER_RET (_jack, ((TransportState) JackTransportStopped));
jack_position_t pos;
return (TransportState) jack_transport_query (_priv_jack, &pos);
}
int
AudioEngine::reset_timebase ()
{
GET_PRIVATE_JACK_POINTER_RET (_jack, -1);
if (_session) {
if (_session->config.get_jack_time_master()) {
return jack_set_timebase_callback (_priv_jack, 0, _jack_timebase_callback, this);
} else {
return jack_release_timebase (_jack);
}
}
return 0;
}
int
AudioEngine::freewheel (bool onoff)
{
GET_PRIVATE_JACK_POINTER_RET (_jack, -1);
if (onoff != _freewheeling) {
return jack_set_freewheel (_priv_jack, onoff);
} else {
/* already doing what has been asked for */
return 0;
}
}
void
AudioEngine::remove_all_ports ()
{
/* process lock MUST be held */
{
RCUWriter<Ports> writer (ports);
boost::shared_ptr<Ports> ps = writer.get_copy ();
for (Ports::iterator i = ps->begin(); i != ps->end(); ++i) {
delete *i;
}
ps->clear ();
}
/* clear dead wood list too */
ports.flush ();
}
int
AudioEngine::connect_to_jack (string client_name)
{
jack_options_t options = JackNullOption;
jack_status_t status;
const char *server_name = NULL;
jack_client_name = client_name; /* might be reset below */
_jack = jack_client_open (jack_client_name.c_str(), options, &status, server_name);
if (_jack == NULL) {
// error message is not useful here
return -1;
}
GET_PRIVATE_JACK_POINTER_RET (_jack, -1);
if (status & JackNameNotUnique) {
jack_client_name = jack_get_client_name (_priv_jack);
}
return 0;
}
int
AudioEngine::disconnect_from_jack ()
{
GET_PRIVATE_JACK_POINTER_RET (_jack, 0);
if (_running) {
stop_metering_thread ();
}
{
Glib::Mutex::Lock lm (_process_lock);
jack_client_close (_priv_jack);
_jack = 0;
}
_buffer_size = 0;
_frame_rate = 0;
_raw_buffer_sizes.clear();
if (_running) {
_running = false;
Stopped(); /* EMIT SIGNAL */
MIDI::JACK_MidiPort::JackHalted (); /* EMIT SIGNAL */
}
return 0;
}
int
AudioEngine::reconnect_to_jack ()
{
if (_running) {
disconnect_from_jack ();
/* XXX give jackd a chance */
Glib::usleep (250000);
}
if (connect_to_jack (jack_client_name)) {
error << _("failed to connect to JACK") << endmsg;
return -1;
}
Ports::iterator i;
boost::shared_ptr<Ports> p = ports.reader ();
for (i = p->begin(); i != p->end(); ++i) {
if ((*i)->reestablish ()) {
break;
}
}
if (i != p->end()) {
/* failed */
remove_all_ports ();
return -1;
}
GET_PRIVATE_JACK_POINTER_RET (_jack,-1);
if (_session) {
_session->reset_jack_connection (_priv_jack);
nframes_t blocksize = jack_get_buffer_size (_priv_jack);
_session->set_block_size (blocksize);
_session->set_frame_rate (jack_get_sample_rate (_priv_jack));
_raw_buffer_sizes[DataType::AUDIO] = blocksize * sizeof(float);
cout << "FIXME: Assuming maximum MIDI buffer size " << blocksize * 4 << "bytes" << endl;
_raw_buffer_sizes[DataType::MIDI] = blocksize * 4;
}
last_monitor_check = 0;
jack_on_shutdown (_priv_jack, halted, this);
jack_set_graph_order_callback (_priv_jack, _graph_order_callback, this);
jack_set_thread_init_callback (_priv_jack, _thread_init_callback, this);
jack_set_process_callback (_priv_jack, _process_callback, this);
jack_set_sample_rate_callback (_priv_jack, _sample_rate_callback, this);
jack_set_buffer_size_callback (_priv_jack, _bufsize_callback, this);
jack_set_xrun_callback (_priv_jack, _xrun_callback, this);
jack_set_sync_callback (_priv_jack, _jack_sync_callback, this);
jack_set_freewheel_callback (_priv_jack, _freewheel_callback, this);
if (_session && _session->config.get_jack_time_master()) {
jack_set_timebase_callback (_priv_jack, 0, _jack_timebase_callback, this);
}
if (jack_activate (_priv_jack) == 0) {
_running = true;
_has_run = true;
} else {
return -1;
}
/* re-establish connections */
for (i = p->begin(); i != p->end(); ++i) {
(*i)->reconnect ();
}
Running (); /* EMIT SIGNAL*/
start_metering_thread ();
return 0;
}
int
AudioEngine::request_buffer_size (nframes_t nframes)
{
GET_PRIVATE_JACK_POINTER_RET (_jack, -1);
if (nframes == jack_get_buffer_size (_priv_jack)) {
return 0;
}
return jack_set_buffer_size (_priv_jack, nframes);
}
void
AudioEngine::update_total_latencies ()
{
#ifdef HAVE_JACK_RECOMPUTE_LATENCIES
GET_PRIVATE_JACK_POINTER (_jack);
jack_recompute_total_latencies (_priv_jack);
#endif
}
string
AudioEngine::make_port_name_relative (string portname)
{
string::size_type len;
string::size_type n;
len = portname.length();
for (n = 0; n < len; ++n) {
if (portname[n] == ':') {
break;
}
}
if ((n != len) && (portname.substr (0, n) == jack_client_name)) {
return portname.substr (n+1);
}
return portname;
}
string
AudioEngine::make_port_name_non_relative (string portname)
{
string str;
if (portname.find_first_of (':') != string::npos) {
return portname;
}
str = jack_client_name;
str += ':';
str += portname;
return str;
}
bool
AudioEngine::is_realtime () const
{
GET_PRIVATE_JACK_POINTER_RET (_jack,false);
return jack_is_realtime (_priv_jack);
}
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