remove skeleton backend (superseded by portaudio)

4 files changed, 0 insertions, 2361 deletions

diff --git a/libs/backends/asio/asio_backend.cc b/libs/backends/asio/asio_backend.cc
deleted file mode 100644
index 60b601665a..0000000000
--- a/libs/backends/asio/asio_backend.cc
+++ /dev/null
@@ -1,1839 +0,0 @@
-/*
- * Copyright (C) 2014 Robin Gareus <robin@gareus.org>
- * Copyright (C) 2013 Paul Davis
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-#include <regex.h>
-#include <sys/mman.h>
-#include <sys/time.h>
-
-#include <glibmm.h>
-
-#include "asio_backend.h"
-#include "rt_thread.h"
-
-#include "pbd/compose.h"
-#include "pbd/error.h"
-#include "pbd/file_utils.h"
-#include "ardour/filesystem_paths.h"
-#include "ardour/port_manager.h"
-#include "i18n.h"
-
-using namespace ARDOUR;
-
-static std::string s_instance_name;
-size_t ASIOBackend::_max_buffer_size = 8192;
-std::vector<std::string> ASIOBackend::_midi_options;
-std::vector<AudioBackend::DeviceStatus> ASIOBackend::_audio_device_status;
-
-
-/* static class instance access */
-static void hw_changed_callback_ptr (void *arg)
-{
-	ASIOBackend *d = static_cast<ASIOBackend*> (arg);
-	d->hw_changed_callback();
-}
-
-static void error_callback_ptr (void *arg)
-{
-	ASIOBackend *d = static_cast<ASIOBackend*> (arg);
-	d->error_callback();
-}
-
-static void xrun_callback_ptr (void *arg)
-{
-	ASIOBackend *d = static_cast<ASIOBackend*> (arg);
-	d->xrun_callback();
-}
-
-static void buffer_size_callback_ptr (void *arg)
-{
-	ASIOBackend *d = static_cast<ASIOBackend*> (arg);
-	d->buffer_size_callback();
-}
-
-static void sample_rate_callback_ptr (void *arg)
-{
-	ASIOBackend *d = static_cast<ASIOBackend*> (arg);
-	d->sample_rate_callback();
-}
-
-
-ASIOBackend::ASIOBackend (AudioEngine& e, AudioBackendInfo& info)
-	: AudioBackend (e, info)
-	, _run (false)
-	, _active_cb (false)
-	, _active_fw (false)
-	, _freewheeling (false)
-	, _freewheel (false)
-	, _freewheel_ack (false)
-	, _reinit_thread_callback (false)
-	, _measure_latency (false)
-	, _last_process_start (0)
-	, _audio_device("")
-	, _midi_driver_option(_("None"))
-	, _samplerate (48000)
-	, _samples_per_period (1024)
-	, _n_inputs (0)
-	, _n_outputs (0)
-	, _systemic_audio_input_latency (0)
-	, _systemic_audio_output_latency (0)
-	, _dsp_load (0)
-	, _processed_samples (0)
-	, _port_change_flag (false)
-{
-	_instance_name = s_instance_name;
-	pthread_mutex_init (&_port_callback_mutex, 0);
-	pthread_mutex_init (&_process_callback_mutex, 0);
-	pthread_mutex_init (&_freewheel_mutex, 0);
-	pthread_cond_init  (&_freewheel_signal, 0);
-
-#if 0 // TODO
-	//_pcmio = new ASIOPCM ();
-	//_midiio = new WindowsMidiIo ();
-
-	_pcmio->set_hw_changed_callback (hw_changed_callback_ptr, this);
-	_pcmio->discover();
-#endif
-}
-
-ASIOBackend::~ASIOBackend ()
-{
-#if 0
-	delete _pcmio; _pcmio = 0; // TODO
-	delete _midiio; _midiio = 0; // TODO
-#endif
-	pthread_mutex_destroy (&_port_callback_mutex);
-	pthread_mutex_destroy (&_process_callback_mutex);
-	pthread_mutex_destroy (&_freewheel_mutex);
-	pthread_cond_destroy  (&_freewheel_signal);
-}
-
-/* AUDIOBACKEND API */
-
-std::string
-ASIOBackend::name () const
-{
-	return X_("ASIO");
-}
-
-bool
-ASIOBackend::is_realtime () const
-{
-	return true;
-}
-
-std::vector<AudioBackend::DeviceStatus>
-ASIOBackend::enumerate_devices () const
-{
-	_audio_device_status.clear();
-#if 0 // TODO
-	std::map<size_t, std::string> devices;
-	_pcmio->device_list(devices);
-
-	for (std::map<size_t, std::string>::const_iterator i = devices.begin (); i != devices.end(); ++i) {
-		if (_audio_device == "") _audio_device = i->second;
-		_audio_device_status.push_back (DeviceStatus (i->second, true));
-	}
-#endif
-	return _audio_device_status;
-}
-
-std::vector<float>
-ASIOBackend::available_sample_rates (const std::string&) const
-{
-	std::vector<float> sr;
-#if 0 // TODO
-	_pcmio->available_sample_rates(_audio_device, sr);
-#endif
-	return sr;
-}
-
-std::vector<uint32_t>
-ASIOBackend::available_buffer_sizes (const std::string&) const
-{
-	std::vector<uint32_t> bs;
-#if 0 // TODO
-	_pcmio->available_buffer_sizes(_audio_device, bs);
-#endif
-	return bs;
-}
-
-uint32_t
-ASIOBackend::available_input_channel_count (const std::string&) const
-{
-	return 128; // TODO query current device
-}
-
-uint32_t
-ASIOBackend::available_output_channel_count (const std::string&) const
-{
-	return 128; // TODO query current device
-}
-
-bool
-ASIOBackend::can_change_sample_rate_when_running () const
-{
-	return false;
-}
-
-bool
-ASIOBackend::can_change_buffer_size_when_running () const
-{
-	return true;
-}
-
-int
-ASIOBackend::set_device_name (const std::string& d)
-{
-	_audio_device = d;
-#if 0 // TODO
-	const float sr = _pcmio->current_sample_rate(_audio_device);
-#endif
-	//if (sr > 0) { set_sample_rate(sr); }
-	return 0;
-}
-
-int
-ASIOBackend::set_sample_rate (float sr)
-{
-	if (sr <= 0) { return -1; }
-	// TODO check if it's in the list of valid SR
-	_samplerate = sr;
-	engine.sample_rate_change (sr);
-	return 0;
-}
-
-int
-ASIOBackend::set_buffer_size (uint32_t bs)
-{
-	if (bs <= 0 || bs >= _max_buffer_size) {
-		return -1;
-	}
-	_samples_per_period = bs;
-#if 0 // TODO
-	_pcmio->set_samples_per_period(bs);
-#endif
-	engine.buffer_size_change (bs);
-	return 0;
-}
-
-int
-ASIOBackend::set_interleaved (bool yn)
-{
-	if (!yn) { return 0; }
-	return -1;
-}
-
-int
-ASIOBackend::set_input_channels (uint32_t cc)
-{
-	_n_inputs = cc;
-	return 0;
-}
-
-int
-ASIOBackend::set_output_channels (uint32_t cc)
-{
-	_n_outputs = cc;
-	return 0;
-}
-
-int
-ASIOBackend::set_systemic_input_latency (uint32_t sl)
-{
-	_systemic_audio_input_latency = sl;
-	return 0;
-}
-
-int
-ASIOBackend::set_systemic_output_latency (uint32_t sl)
-{
-	_systemic_audio_output_latency = sl;
-	return 0;
-}
-
-/* Retrieving parameters */
-std::string
-ASIOBackend::device_name () const
-{
-	return _audio_device;
-}
-
-float
-ASIOBackend::sample_rate () const
-{
-	return _samplerate;
-}
-
-uint32_t
-ASIOBackend::buffer_size () const
-{
-	return _samples_per_period;
-}
-
-bool
-ASIOBackend::interleaved () const
-{
-	return false;
-}
-
-uint32_t
-ASIOBackend::input_channels () const
-{
-	return _n_inputs;
-}
-
-uint32_t
-ASIOBackend::output_channels () const
-{
-	return _n_outputs;
-}
-
-uint32_t
-ASIOBackend::systemic_input_latency () const
-{
-	return _systemic_audio_input_latency;
-}
-
-uint32_t
-ASIOBackend::systemic_output_latency () const
-{
-	return _systemic_audio_output_latency;
-}
-
-/* MIDI */
-
-std::vector<std::string>
-ASIOBackend::enumerate_midi_options () const
-{
-	if (_midi_options.empty()) {
-		_midi_options.push_back (_("WindowsMidi"));
-		_midi_options.push_back (_("None"));
-	}
-	return _midi_options;
-}
-
-int
-ASIOBackend::set_midi_option (const std::string& opt)
-{
-	if (opt != _("None") && opt != _("WindowsMidi")) {
-		return -1;
-	}
-	_midi_driver_option = opt;
-	return 0;
-}
-
-std::string
-ASIOBackend::midi_option () const
-{
-	return _midi_driver_option;
-}
-
-void
-ASIOBackend::launch_control_app ()
-{
-	// TODO
-}
-
-/* State Control */
-
-static void * pthread_freewheel (void *arg)
-{
-	ASIOBackend *d = static_cast<ASIOBackend *>(arg);
-	d->freewheel_thread ();
-	pthread_exit (0);
-	return 0;
-}
-
-static int process_callback_ptr (void *arg, const uint32_t n_samples, const uint64_t host_time)
-{
-	ASIOBackend *d = static_cast<ASIOBackend*> (arg);
-	return d->process_callback(n_samples, host_time);
-}
-
-int
-ASIOBackend::_start (bool for_latency_measurement)
-{
-	if ((!_active_cb || !_active_fw)  && _run) {
-		// recover from 'halted', reap threads
-		stop();
-	}
-
-	if (_active_cb || _active_fw || _run) {
-		PBD::error << _("ASIOBackend: already active.") << endmsg;
-		return -1;
-	}
-
-	if (_ports.size()) {
-		PBD::warning << _("ASIOBackend: recovering from unclean shutdown, port registry is not empty.") << endmsg;
-		_system_inputs.clear();
-		_system_outputs.clear();
-		_system_midi_in.clear();
-		_system_midi_out.clear();
-		_ports.clear();
-	}
-
-	assert(_active_cb == false);
-	assert(_active_fw == false);
-
-	_freewheel_ack = false;
-	_reinit_thread_callback = true;
-	_last_process_start = 0;
-
-#if 0 // TODO
-	_pcmio->set_error_callback (error_callback_ptr, this);
-	_pcmio->set_buffer_size_callback (buffer_size_callback_ptr, this);
-	_pcmio->set_sample_rate_callback (sample_rate_callback_ptr, this);
-
-	_pcmio->pcm_start (device1, device2, _samplerate, _samples_per_period, process_callback_ptr, this);
-
-	switch (_pcmio->state ()) {
-		case 0: /* OK */ break;
-		case -1: PBD::error << _("ASIOBackend: failed to open device.") << endmsg; break;
-		default: PBD::error << _("ASIOBackend: initialization failed.") << endmsg; break;
-	}
-	if (_pcmio->state ()) {
-		return -1;
-	}
-
-	if (_n_outputs != _pcmio->n_playback_channels ()) {
-		if (_n_outputs == 0) {
-		 _n_outputs = _pcmio->n_playback_channels ();
-		} else {
-		 _n_outputs = std::min (_n_outputs, _pcmio->n_playback_channels ());
-		}
-		PBD::info << _("ASIOBackend: adjusted output channel count to match device.") << endmsg;
-	}
-
-	if (_n_inputs != _pcmio->n_capture_channels ()) {
-		if (_n_inputs == 0) {
-		 _n_inputs = _pcmio->n_capture_channels ();
-		} else {
-		 _n_inputs = std::min (_n_inputs, _pcmio->n_capture_channels ());
-		}
-		PBD::info << _("ASIOBackend: adjusted input channel count to match device.") << endmsg;
-	}
-
-	if (_pcmio->samples_per_period() != _samples_per_period) {
-		_samples_per_period = _pcmio->samples_per_period();
-		PBD::warning << _("ASIOBackend: samples per period does not match.") << endmsg;
-	}
-
-	if (_pcmio->sample_rate() != _samplerate) {
-		_samplerate = _pcmio->sample_rate();
-		engine.sample_rate_change (_samplerate);
-		PBD::warning << _("ASIOBackend: sample rate does not match.") << endmsg;
-	}
-#endif
-
-	_measure_latency = for_latency_measurement;
-
-	_preinit = true;
-	_run = true;
-	_port_change_flag = false;
-
-#if 0 // TODO
-	if (_midi_driver_option == _("WindowsMidi")) {
-		// TODO
-		//_midiio->set_enabled(true);
-		//_midiio->set_port_changed_callback(midi_port_change, this);
-		//_midiio->start(); // triggers port discovery, callback coremidi_rediscover()
-	}
-#endif
-
-	if (register_system_audio_ports()) {
-		PBD::error << _("ASIOBackend: failed to register system ports.") << endmsg;
-		_run = false;
-		return -1;
-	}
-
-	engine.sample_rate_change (_samplerate);
-	engine.buffer_size_change (_samples_per_period);
-
-	if (engine.reestablish_ports ()) {
-		PBD::error << _("ASIOBackend: Could not re-establish ports.") << endmsg;
-		_run = false;
-		return -1;
-	}
-
-	if (pthread_create (&_freeewheel_thread, NULL, pthread_freewheel, this))
-	{
-		PBD::error << _("ASIOBackend: failed to create process thread.") << endmsg;
-#if 0 // TODO
-		delete _pcmio; _pcmio = 0;
-#endif
-		_run = false;
-		return -1;
-	}
-
-	int timeout = 5000;
-	while ((!_active_cb || !_active_fw) && --timeout > 0) { Glib::usleep (1000); }
-
-	if (timeout == 0) {
-		PBD::error << _("ASIOBackend: failed to start.") << endmsg;
-	}
-
-	if (!_active_fw) {
-		PBD::error << _("ASIOBackend: failed to start freewheeling thread.") << endmsg;
-		_run = false;
-#if 0 // TODO
-		_pcmio->pcm_stop();
-#endif
-		unregister_ports();
-		_active_cb = false;
-		_active_fw = false;
-		return -1;
-	}
-
-	if (!_active_cb) {
-		PBD::error << _("ASIOBackend: failed to start ASIO.") << endmsg;
-		stop();
-		_run = false;
-		return -1;
-	}
-
-	engine.reconnect_ports ();
-
-	// force  an initial registration_callback() & latency re-compute
-	_port_change_flag = true;
-	pre_process ();
-
-	// all systems go.
-#if 0 // TODO
-	_pcmio->set_xrun_callback (xrun_callback_ptr, this);
-#endif
-	_preinit = false;
-
-	return 0;
-}
-
-int
-ASIOBackend::stop ()
-{
-	void *status;
-	if (!_run) {
-		return 0;
-	}
-
-	_run = false;
-#if 0 // TODO
-	_pcmio->pcm_stop();
-	_midiio->set_port_changed_callback(NULL, NULL);
-	_midiio->stop();
-#endif
-	pthread_mutex_lock (&_freewheel_mutex);
-	pthread_cond_signal (&_freewheel_signal);
-	pthread_mutex_unlock (&_freewheel_mutex);
-
-	if (pthread_join (_freeewheel_thread, &status)) {
-		PBD::error << _("ASIOBackend: failed to terminate.") << endmsg;
-		return -1;
-	}
-
-	unregister_ports();
-
-	_active_cb = false;
-	_active_fw = false; // ??
-
-	return 0;
-}
-
-int
-ASIOBackend::freewheel (bool onoff)
-{
-	if (onoff == _freewheeling) {
-		return 0;
-	}
-	_freewheeling = onoff;
-	// wake up freewheeling thread
-	if (0 == pthread_mutex_trylock (&_freewheel_mutex)) {
-		pthread_cond_signal (&_freewheel_signal);
-		pthread_mutex_unlock (&_freewheel_mutex);
-	}
-	return 0;
-}
-
-float
-ASIOBackend::dsp_load () const
-{
-	return 100.f * _dsp_load;
-}
-
-size_t
-ASIOBackend::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 */
-framepos_t
-ASIOBackend::sample_time ()
-{
-	return _processed_samples;
-}
-
-framepos_t
-ASIOBackend::sample_time_at_cycle_start ()
-{
-	return _processed_samples;
-}
-
-pframes_t
-ASIOBackend::samples_since_cycle_start ()
-{
-	if (!_active_cb || !_run || _freewheeling || _freewheel) {
-		return 0;
-	}
-	if (_last_process_start == 0) {
-		return 0;
-	}
-
-#if 0 // TODO
-	const uint64_t now = AudioGetCurrentHostTime ();
-	const int64_t elapsed_time_ns = AudioConvertHostTimeToNanos(now - _last_process_start);
-	return std::max((pframes_t)0, (pframes_t)rint(1e-9 * elapsed_time_ns * _samplerate));
-#else
-	return 0;
-#endif
-}
-
-void *
-ASIOBackend::asio_process_thread (void *arg)
-{
-	ThreadData* td = reinterpret_cast<ThreadData*> (arg);
-	boost::function<void ()> f = td->f;
-	delete td;
-	f ();
-	return 0;
-}
-
-int
-ASIOBackend::create_process_thread (boost::function<void()> func)
-{
-	pthread_t thread_id;
-	pthread_attr_t attr;
-	size_t stacksize = 100000;
-
-	ThreadData* td = new ThreadData (this, func, stacksize);
-
-	if (_realtime_pthread_create (SCHED_FIFO, -21, stacksize,
-				&thread_id, asio_process_thread, td)) {
-		pthread_attr_init (&attr);
-		pthread_attr_setstacksize (&attr, stacksize);
-		if (pthread_create (&thread_id, &attr, asio_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
-ASIOBackend::join_process_threads ()
-{
-	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
-ASIOBackend::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
-ASIOBackend::process_thread_count ()
-{
-	return _threads.size ();
-}
-
-void
-ASIOBackend::update_latencies ()
-{
-	// trigger latency callback in RT thread (locked graph)
-	port_connect_add_remove_callback();
-}
-
-/* PORTENGINE API */
-
-void*
-ASIOBackend::private_handle () const
-{
-	return NULL;
-}
-
-const std::string&
-ASIOBackend::my_name () const
-{
-	return _instance_name;
-}
-
-bool
-ASIOBackend::available () const
-{
-	return _run && _active_fw && _active_cb;
-}
-
-uint32_t
-ASIOBackend::port_name_size () const
-{
-	return 256;
-}
-
-int
-ASIOBackend::set_port_name (PortEngine::PortHandle port, const std::string& name)
-{
-	if (!valid_port (port)) {
-		PBD::error << _("ASIOBackend::set_port_name: Invalid Port(s)") << endmsg;
-		return -1;
-	}
-	return static_cast<ASIOBackendPort*>(port)->set_name (_instance_name + ":" + name);
-}
-
-std::string
-ASIOBackend::get_port_name (PortEngine::PortHandle port) const
-{
-	if (!valid_port (port)) {
-		PBD::error << _("ASIOBackend::get_port_name: Invalid Port(s)") << endmsg;
-		return std::string ();
-	}
-	return static_cast<ASIOBackendPort*>(port)->name ();
-}
-
-int
-ASIOBackend::get_port_property (PortHandle port, const std::string& key, std::string& value, std::string& type) const
-{
-	if (!valid_port (port)) {
-		PBD::error << _("ASIOBackend::get_port_name: Invalid Port(s)") << endmsg;
-		return -1;
-	}
-	if (key == "http://jackaudio.org/metadata/pretty-name") {
-		type = "";
-		value = static_cast<ASIOBackendPort*>(port)->pretty_name ();
-		if (!value.empty()) {
-			return 0;
-		}
-	}
-	return -1;
-}
-
-PortEngine::PortHandle
-ASIOBackend::get_port_by_name (const std::string& name) const
-{
-	PortHandle port = (PortHandle) find_port (name);
-	return port;
-}
-
-int
-ASIOBackend::get_ports (
-		const std::string& port_name_pattern,
-		DataType type, PortFlags flags,
-		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) {
-		ASIOBackendPort* 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
-ASIOBackend::port_data_type (PortEngine::PortHandle port) const
-{
-	if (!valid_port (port)) {
-		return DataType::NIL;
-	}
-	return static_cast<ASIOBackendPort*>(port)->type ();
-}
-
-PortEngine::PortHandle
-ASIOBackend::register_port (
-		const std::string& name,
-		ARDOUR::DataType type,
-		ARDOUR::PortFlags flags)
-{
-	if (name.size () == 0) { return 0; }
-	if (flags & IsPhysical) { return 0; }
-	return add_port (_instance_name + ":" + name, type, flags);
-}
-
-PortEngine::PortHandle
-ASIOBackend::add_port (
-		const std::string& name,
-		ARDOUR::DataType type,
-		ARDOUR::PortFlags flags)
-{
-	assert(name.size ());
-	if (find_port (name)) {
-		PBD::error << _("ASIOBackend::register_port: Port already exists:")
-				<< " (" << name << ")" << endmsg;
-		return 0;
-	}
-	ASIOBackendPort* port = NULL;
-	switch (type) {
-		case DataType::AUDIO:
-			port = new ASIOPort (*this, name, flags);
-			break;
-		case DataType::MIDI:
-			port = new WindowsMidiPort (*this, name, flags);
-			break;
-		default:
-			PBD::error << _("ASIOBackend::register_port: Invalid Data Type.") << endmsg;
-			return 0;
-	}
-
-	_ports.push_back (port);
-
-	return port;
-}
-
-void
-ASIOBackend::unregister_port (PortEngine::PortHandle port_handle)
-{
-	if (!_run) {
-		return;
-	}
-	ASIOBackendPort* port = static_cast<ASIOBackendPort*>(port_handle);
-	std::vector<ASIOBackendPort*>::iterator i = std::find (_ports.begin (), _ports.end (), static_cast<ASIOBackendPort*>(port_handle));
-	if (i == _ports.end ()) {
-		PBD::error << _("ASIOBackend::unregister_port: Failed to find port") << endmsg;
-		return;
-	}
-	disconnect_all(port_handle);
-	_ports.erase (i);
-	delete port;
-}
-
-int
-ASIOBackend::register_system_audio_ports()
-{
-	LatencyRange lr;
-
-	const uint32_t a_ins = _n_inputs;
-	const uint32_t a_out = _n_outputs;
-
-	const uint32_t asio_reported_input_latency =  0; // TODO _pcmio->get_latency(_audio_device, true);
-	const uint32_t asio_reported_output_latency = 0; // TODO _pcmio->get_latency(_audio_device, false);
-
-	/* audio ports */
-	lr.min = lr.max = asio_reported_input_latency + (_measure_latency ? 0 : _systemic_audio_input_latency);
-	for (uint32_t i = 0; i < a_ins; ++i) {
-		char tmp[64];
-		snprintf(tmp, sizeof(tmp), "system:capture_%d", i+1);
-		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);
-		ASIOBackendPort *cp = static_cast<ASIOBackendPort*>(p);
-		//cp->set_pretty_name (_pcmio->cached_port_name(i, true)); // TODO
-		_system_inputs.push_back(cp);
-	}
-
-	lr.min = lr.max = asio_reported_output_latency + (_measure_latency ? 0 : _systemic_audio_output_latency);
-	for (uint32_t i = 0; i < a_out; ++i) {
-		char tmp[64];
-		snprintf(tmp, sizeof(tmp), "system:playback_%d", i+1);
-		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);
-		ASIOBackendPort *cp = static_cast<ASIOBackendPort*>(p);
-		//cp->set_pretty_name (_pcmio->cached_port_name(i, false)); // TODO
-		_system_outputs.push_back(cp);
-	}
-	return 0;
-}
-
-void
-ASIOBackend::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 ()) {
-		ASIOBackendPort* 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
-ASIOBackend::connect (const std::string& src, const std::string& dst)
-{
-	ASIOBackendPort* src_port = find_port (src);
-	ASIOBackendPort* dst_port = find_port (dst);
-
-	if (!src_port) {
-		PBD::error << _("ASIOBackend::connect: Invalid Source port:")
-				<< " (" << src <<")" << endmsg;
-		return -1;
-	}
-	if (!dst_port) {
-		PBD::error << _("ASIOBackend::connect: Invalid Destination port:")
-			<< " (" << dst <<")" << endmsg;
-		return -1;
-	}
-	return src_port->connect (dst_port);
-}
-
-int
-ASIOBackend::disconnect (const std::string& src, const std::string& dst)
-{
-	ASIOBackendPort* src_port = find_port (src);
-	ASIOBackendPort* dst_port = find_port (dst);
-
-	if (!src_port || !dst_port) {
-		PBD::error << _("ASIOBackend::disconnect: Invalid Port(s)") << endmsg;
-		return -1;
-	}
-	return src_port->disconnect (dst_port);
-}
-
-int
-ASIOBackend::connect (PortEngine::PortHandle src, const std::string& dst)
-{
-	ASIOBackendPort* dst_port = find_port (dst);
-	if (!valid_port (src)) {
-		PBD::error << _("ASIOBackend::connect: Invalid Source Port Handle") << endmsg;
-		return -1;
-	}
-	if (!dst_port) {
-		PBD::error << _("ASIOBackend::connect: Invalid Destination Port")
-			<< " (" << dst << ")" << endmsg;
-		return -1;
-	}
-	return static_cast<ASIOBackendPort*>(src)->connect (dst_port);
-}
-
-int
-ASIOBackend::disconnect (PortEngine::PortHandle src, const std::string& dst)
-{
-	ASIOBackendPort* dst_port = find_port (dst);
-	if (!valid_port (src) || !dst_port) {
-		PBD::error << _("ASIOBackend::disconnect: Invalid Port(s)") << endmsg;
-		return -1;
-	}
-	return static_cast<ASIOBackendPort*>(src)->disconnect (dst_port);
-}
-
-int
-ASIOBackend::disconnect_all (PortEngine::PortHandle port)
-{
-	if (!valid_port (port)) {
-		PBD::error << _("ASIOBackend::disconnect_all: Invalid Port") << endmsg;
-		return -1;
-	}
-	static_cast<ASIOBackendPort*>(port)->disconnect_all ();
-	return 0;
-}
-
-bool
-ASIOBackend::connected (PortEngine::PortHandle port, bool /* process_callback_safe*/)
-{
-	if (!valid_port (port)) {
-		PBD::error << _("ASIOBackend::disconnect_all: Invalid Port") << endmsg;
-		return false;
-	}
-	return static_cast<ASIOBackendPort*>(port)->is_connected ();
-}
-
-bool
-ASIOBackend::connected_to (PortEngine::PortHandle src, const std::string& dst, bool /*process_callback_safe*/)
-{
-	ASIOBackendPort* dst_port = find_port (dst);
-	if (!valid_port (src) || !dst_port) {
-		PBD::error << _("ASIOBackend::connected_to: Invalid Port") << endmsg;
-		return false;
-	}
-	return static_cast<ASIOBackendPort*>(src)->is_connected (dst_port);
-}
-
-bool
-ASIOBackend::physically_connected (PortEngine::PortHandle port, bool /*process_callback_safe*/)
-{
-	if (!valid_port (port)) {
-		PBD::error << _("ASIOBackend::physically_connected: Invalid Port") << endmsg;
-		return false;
-	}
-	return static_cast<ASIOBackendPort*>(port)->is_physically_connected ();
-}
-
-int
-ASIOBackend::get_connections (PortEngine::PortHandle port, std::vector<std::string>& names, bool /*process_callback_safe*/)
-{
-	if (!valid_port (port)) {
-		PBD::error << _("ASIOBackend::get_connections: Invalid Port") << endmsg;
-		return -1;
-	}
-
-	assert (0 == names.size ());
-
-	const std::vector<ASIOBackendPort*>& connected_ports = static_cast<ASIOBackendPort*>(port)->get_connections ();
-
-	for (std::vector<ASIOBackendPort*>::const_iterator i = connected_ports.begin (); i != connected_ports.end (); ++i) {
-		names.push_back ((*i)->name ());
-	}
-
-	return (int)names.size ();
-}
-
-/* MIDI */
-int
-ASIOBackend::midi_event_get (
-		pframes_t& timestamp,
-		size_t& size, uint8_t** buf, void* port_buffer,
-		uint32_t event_index)
-{
-	if (!buf || !port_buffer) return -1;
-	WindowsMidiBuffer& source = * static_cast<WindowsMidiBuffer*>(port_buffer);
-	if (event_index >= source.size ()) {
-		return -1;
-	}
-	WindowsMidiEvent * const event = source[event_index].get ();
-
-	timestamp = event->timestamp ();
-	size = event->size ();
-	*buf = event->data ();
-	return 0;
-}
-
-int
-ASIOBackend::midi_event_put (
-		void* port_buffer,
-		pframes_t timestamp,
-		const uint8_t* buffer, size_t size)
-{
-	if (!buffer || !port_buffer) return -1;
-	WindowsMidiBuffer& dst = * static_cast<WindowsMidiBuffer*>(port_buffer);
-	if (dst.size () && (pframes_t)dst.back ()->timestamp () > timestamp) {
-#ifndef NDEBUG
-		// nevermind, ::get_buffer() sorts events
-		fprintf (stderr, "WindowsMidiBuffer: unordered event: %d > %d\n",
-				(pframes_t)dst.back ()->timestamp (), timestamp);
-#endif
-	}
-	dst.push_back (boost::shared_ptr<WindowsMidiEvent>(new WindowsMidiEvent (timestamp, buffer, size)));
-	return 0;
-}
-
-uint32_t
-ASIOBackend::get_midi_event_count (void* port_buffer)
-{
-	if (!port_buffer) return 0;
-	return static_cast<WindowsMidiBuffer*>(port_buffer)->size ();
-}
-
-void
-ASIOBackend::midi_clear (void* port_buffer)
-{
-	if (!port_buffer) return;
-	WindowsMidiBuffer * buf = static_cast<WindowsMidiBuffer*>(port_buffer);
-	assert (buf);
-	buf->clear ();
-}
-
-/* Monitoring */
-
-bool
-ASIOBackend::can_monitor_input () const
-{
-	return false;
-}
-
-int
-ASIOBackend::request_input_monitoring (PortEngine::PortHandle, bool)
-{
-	return -1;
-}
-
-int
-ASIOBackend::ensure_input_monitoring (PortEngine::PortHandle, bool)
-{
-	return -1;
-}
-
-bool
-ASIOBackend::monitoring_input (PortEngine::PortHandle)
-{
-	return false;
-}
-
-/* Latency management */
-
-void
-ASIOBackend::set_latency_range (PortEngine::PortHandle port, bool for_playback, LatencyRange latency_range)
-{
-	if (!valid_port (port)) {
-		PBD::error << _("ASIOBackendPort::set_latency_range (): invalid port.") << endmsg;
-	}
-	static_cast<ASIOBackendPort*>(port)->set_latency_range (latency_range, for_playback);
-}
-
-LatencyRange
-ASIOBackend::get_latency_range (PortEngine::PortHandle port, bool for_playback)
-{
-	LatencyRange r;
-	if (!valid_port (port)) {
-		PBD::error << _("ASIOBackendPort::get_latency_range (): invalid port.") << endmsg;
-		r.min = 0;
-		r.max = 0;
-		return r;
-	}
-	ASIOBackendPort* p = static_cast<ASIOBackendPort*>(port);
-	assert(p);
-
-	r = p->latency_range (for_playback);
-	if (p->is_physical() && p->is_terminal() && p->type() == DataType::AUDIO) {
-		if (p->is_input() && for_playback) {
-			r.min += _samples_per_period;
-			r.max += _samples_per_period;
-		}
-		if (p->is_output() && !for_playback) {
-			r.min += _samples_per_period;
-			r.max += _samples_per_period;
-		}
-	}
-	return r;
-}
-
-/* Discovering physical ports */
-
-bool
-ASIOBackend::port_is_physical (PortEngine::PortHandle port) const
-{
-	if (!valid_port (port)) {
-		PBD::error << _("ASIOBackendPort::port_is_physical (): invalid port.") << endmsg;
-		return false;
-	}
-	return static_cast<ASIOBackendPort*>(port)->is_physical ();
-}
-
-void
-ASIOBackend::get_physical_outputs (DataType type, std::vector<std::string>& port_names)
-{
-	for (size_t i = 0; i < _ports.size (); ++i) {
-		ASIOBackendPort* port = _ports[i];
-		if ((port->type () == type) && port->is_input () && port->is_physical ()) {
-			port_names.push_back (port->name ());
-		}
-	}
-}
-
-void
-ASIOBackend::get_physical_inputs (DataType type, std::vector<std::string>& port_names)
-{
-	for (size_t i = 0; i < _ports.size (); ++i) {
-		ASIOBackendPort* port = _ports[i];
-		if ((port->type () == type) && port->is_output () && port->is_physical ()) {
-			port_names.push_back (port->name ());
-		}
-	}
-}
-
-ChanCount
-ASIOBackend::n_physical_outputs () const
-{
-	int n_midi = 0;
-	int n_audio = 0;
-	for (size_t i = 0; i < _ports.size (); ++i) {
-		ASIOBackendPort* 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, n_audio);
-	cc.set (DataType::MIDI, n_midi);
-	return cc;
-}
-
-ChanCount
-ASIOBackend::n_physical_inputs () const
-{
-	int n_midi = 0;
-	int n_audio = 0;
-	for (size_t i = 0; i < _ports.size (); ++i) {
-		ASIOBackendPort* 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, n_audio);
-	cc.set (DataType::MIDI, n_midi);
-	return cc;
-}
-
-/* Getting access to the data buffer for a port */
-
-void*
-ASIOBackend::get_buffer (PortEngine::PortHandle port, pframes_t nframes)
-{
-	if (!port || !valid_port (port)) return NULL;
-	return static_cast<ASIOBackendPort*>(port)->get_buffer (nframes);
-}
-
-void
-ASIOBackend::pre_process ()
-{
-	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);
-	}
-}
-
-void *
-ASIOBackend::freewheel_thread ()
-{
-	_active_fw = true;
-	bool first_run = false;
-	/* Freewheeling - use for export.   The first call to
-	 * engine.process_callback() after engine.freewheel_callback will
-	 * if the first export cycle.
-	 * For reliable precise export timing, the calls need to be in sync.
-	 *
-	 * Furthermore we need to make sure the registered process thread
-	 * is correct.
-	 *
-	 * _freewheeling = GUI thread state as set by ::freewheel()
-	 * _freewheel = in sync here (export thread)
-	 */
-	pthread_mutex_lock (&_freewheel_mutex);
-	while (_run) {
-		// check if we should run,
-		if (_freewheeling != _freewheel) {
-			if (!_freewheeling) {
-				// prepare leaving freewheeling mode
-				_freewheel = false; // first mark as disabled
-				_reinit_thread_callback = true; // hand over _main_thread
-				_freewheel_ack = false; // prepare next handshake
-#if 0 // TODO disable hadrware MIDI threads during freewheeling
-				_midiio->set_enabled(true);
-#endif
-			} else {
-				first_run = true;
-				_freewheel = true;
-			}
-		}
-
-		if (!_freewheel || !_freewheel_ack) {
-			// wait for a change, we use a timed wait to
-			// terminate early in case some error sets _run = 0
-			struct timeval tv;
-			struct timespec ts;
-			gettimeofday (&tv, NULL);
-			ts.tv_sec = tv.tv_sec + 3;
-			ts.tv_nsec = 0;
-			pthread_cond_timedwait (&_freewheel_signal, &_freewheel_mutex, &ts);
-			continue;
-		}
-
-		if (first_run) {
-			// tell the engine we're ready to GO.
-			engine.freewheel_callback (_freewheeling);
-			first_run = false;
-			_main_thread = pthread_self();
-			AudioEngine::thread_init_callback (this);
-#if 0 // TODO
-			_midiio->set_enabled(false);
-#endif
-		}
-
-		// process port updates first in every cycle.
-		pre_process();
-
-		// prevent device changes
-		pthread_mutex_lock (&_process_callback_mutex);
-
-		/* Freewheelin' */
-
-		// clear input buffers
-		for (std::vector<ASIOBackendPort*>::const_iterator it = _system_inputs.begin (); it != _system_inputs.end (); ++it) {
-			memset ((*it)->get_buffer (_samples_per_period), 0, _samples_per_period * sizeof (Sample));
-		}
-		for (std::vector<ASIOBackendPort*>::const_iterator it = _system_midi_in.begin (); it != _system_midi_in.end (); ++it) {
-			static_cast<WindowsMidiBuffer*>((*it)->get_buffer(0))->clear ();
-		}
-
-		_last_process_start = 0;
-		if (engine.process_callback (_samples_per_period)) {
-			pthread_mutex_unlock (&_process_callback_mutex);
-			break;
-		}
-
-		pthread_mutex_unlock (&_process_callback_mutex);
-		_dsp_load = 1.0;
-		Glib::usleep (100); // don't hog cpu
-	}
-
-	pthread_mutex_unlock (&_freewheel_mutex);
-
-	_active_fw = false;
-
-	if (_run) {
-		// engine.process_callback() returner error
-		engine.halted_callback("ASIO Freehweeling aborted.");
-	}
-	return 0;
-}
-
-int
-ASIOBackend::process_callback (const uint32_t n_samples, const uint64_t host_time)
-{
-	uint32_t i = 0;
-	uint64_t clock1, clock2;
-
-	_active_cb = true;
-
-	if (_run && _freewheel && !_freewheel_ack) {
-		// acknowledge freewheeling; hand-over thread ID
-		pthread_mutex_lock (&_freewheel_mutex);
-		if (_freewheel) _freewheel_ack = true;
-		pthread_cond_signal (&_freewheel_signal);
-		pthread_mutex_unlock (&_freewheel_mutex);
-	}
-
-	if (!_run || _freewheel || _preinit) {
-		// NB if we return 1, the output is
-		// zeroed by the asio callback
-		return 1;
-	}
-
-	if (_reinit_thread_callback || _main_thread != pthread_self()) {
-		_reinit_thread_callback = false;
-		_main_thread = pthread_self();
-		AudioEngine::thread_init_callback (this);
-	}
-
-	if (pthread_mutex_trylock (&_process_callback_mutex)) {
-		// block while devices are added/removed
-#ifndef NDEBUG
-		printf("Xrun due to device change\n");
-#endif
-		engine.Xrun();
-		return 1;
-	}
-	/* port-connection change */
-	pre_process();
-
-	// cycle-length in usec
-	const double nominal_time = 1e6 * n_samples / _samplerate;
-
-	clock1 = g_get_monotonic_time();
-
-	/* get midi */
-	i=0;
-	for (std::vector<ASIOBackendPort*>::const_iterator it = _system_midi_in.begin (); it != _system_midi_in.end (); ++it, ++i) {
-		WindowsMidiBuffer* mbuf = static_cast<WindowsMidiBuffer*>((*it)->get_buffer(0));
-		mbuf->clear();
-#if 0 // TODO
-		uint64_t time_ns;
-		uint8_t data[128];
-		size_t size = sizeof(data);
-		while (_midiio->recv_event (i, nominal_time, time_ns, data, size)) {
-			pframes_t time = floor((float) time_ns * _samplerate * 1e-9);
-			assert (time < n_samples);
-			midi_event_put((void*)mbuf, time, data, size);
-			size = sizeof(data);
-		}
-#endif
-	}
-
-	/* get audio */
-	i = 0;
-	for (std::vector<ASIOBackendPort*>::const_iterator it = _system_inputs.begin (); it != _system_inputs.end (); ++it, ++i) {
-#if 0 // TODO
-		_pcmio->get_capture_channel (i, (float*)((*it)->get_buffer(n_samples)), n_samples);
-#else
-		memset ((*it)->get_buffer (n_samples), 0, n_samples * sizeof (Sample));
-#endif
-	}
-
-	/* clear output buffers */
-	for (std::vector<ASIOBackendPort*>::const_iterator it = _system_outputs.begin (); it != _system_outputs.end (); ++it) {
-		memset ((*it)->get_buffer (n_samples), 0, n_samples * sizeof (Sample));
-	}
-
-#if 0 // TODO; sync Audio + midi
-	_midiio->start_cycle();
-#endif
-	_last_process_start = host_time;
-
-	if (engine.process_callback (n_samples)) {
-		fprintf(stderr, "ENGINE PROCESS ERROR\n");
-		_active_cb = false;
-		pthread_mutex_unlock (&_process_callback_mutex);
-		return -1;
-	}
-
-	/* mixdown midi */
-	for (std::vector<ASIOBackendPort*>::const_iterator it = _system_midi_out.begin (); it != _system_midi_out.end (); ++it) {
-		static_cast<WindowsMidiPort*>(*it)->get_buffer(0);
-	}
-
-	/* queue outgoing midi */
-#if 0 // TODO
-	i = 0;
-	for (std::vector<ASIOBackendPort*>::const_iterator it = _system_midi_out.begin (); it != _system_midi_out.end (); ++it, ++i) {
-#if 0 // something's still b0rked with WindowsMidiIo::send_events()
-		const WindowsMidiBuffer *src = static_cast<const WindowsMidiPort*>(*it)->const_buffer();
-		_midiio->send_events (i, nominal_time, (void*)src);
-#else // works..
-		const WindowsMidiBuffer *src = static_cast<const WindowsMidiPort*>(*it)->const_buffer();
-		for (WindowsMidiBuffer::const_iterator mit = src->begin (); mit != src->end (); ++mit) {
-			_midiio->send_event (i, (*mit)->timestamp() / nominal_time, (*mit)->data(), (*mit)->size());
-		}
-#endif
-	}
-#endif
-
-	/* write back audio */
-#if 0 // TODO
-	i = 0;
-	for (std::vector<ASIOBackendPort*>::const_iterator it = _system_outputs.begin (); it != _system_outputs.end (); ++it, ++i) {
-		_pcmio->set_playback_channel (i, (float const*)(*it)->get_buffer (n_samples), n_samples);
-	}
-#endif
-
-	_processed_samples += n_samples;
-
-	/* calc DSP load. */
-	clock2 = g_get_monotonic_time();
-	const int64_t elapsed_time = clock2 - clock1;
-	_dsp_load = elapsed_time / nominal_time;
-
-	pthread_mutex_unlock (&_process_callback_mutex);
-	return 0;
-}
-
-void
-ASIOBackend::error_callback ()
-{
-#if 0 // TODO
-	_pcmio->set_error_callback (NULL, NULL);
-	_pcmio->set_sample_rate_callback (NULL, NULL);
-	_pcmio->set_xrun_callback (NULL, NULL);
-	_midiio->set_port_changed_callback(NULL, NULL);
-#endif
-	engine.halted_callback("ASIO Process aborted.");
-	_active_cb = false;
-}
-
-void
-ASIOBackend::xrun_callback ()
-{
-	engine.Xrun ();
-}
-
-void
-ASIOBackend::buffer_size_callback ()
-{
-#if 0 // TODO
-	uint32_t bs = _pcmio->samples_per_period();
-	if (bs == _samples_per_period) {
-		return;
-	}
-	_samples_per_period = bs;
-	engine.buffer_size_change (_samples_per_period);
-#endif
-}
-
-void
-ASIOBackend::sample_rate_callback ()
-{
-#if 0  // TODO
-	_pcmio->set_error_callback (NULL, NULL);
-	_pcmio->set_sample_rate_callback (NULL, NULL);
-	_pcmio->set_xrun_callback (NULL, NULL);
-	_midiio->set_port_changed_callback(NULL, NULL);
-	engine.halted_callback("Sample Rate Changed.");
-	stop();
-#endif
-}
-
-void
-ASIOBackend::hw_changed_callback ()
-{
-#if 0 // TODO
-	_reinit_thread_callback = true;
-	engine.request_device_list_update();
-#endif
-}
-
-/******************************************************************************/
-
-static boost::shared_ptr<ASIOBackend> _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 = {
-	"ASIO",
-	instantiate,
-	deinstantiate,
-	backend_factory,
-	already_configured,
-	available
-};
-
-static boost::shared_ptr<AudioBackend>
-backend_factory (AudioEngine& e)
-{
-	if (!_instance) {
-		_instance.reset (new ASIOBackend (e, _descriptor));
-	}
-	return _instance;
-}
-
-static int
-instantiate (const std::string& arg1, const std::string& /* arg2 */)
-{
-	s_instance_name = arg1;
-	return 0;
-}
-
-static int
-deinstantiate ()
-{
-	_instance.reset ();
-	return 0;
-}
-
-static bool
-already_configured ()
-{
-	return false;
-}
-
-static bool
-available ()
-{
-	return true;
-}
-
-extern "C" ARDOURBACKEND_API ARDOUR::AudioBackendInfo* descriptor ()
-{
-	return &_descriptor;
-}
-
-
-/******************************************************************************/
-ASIOBackendPort::ASIOBackendPort (ASIOBackend &b, const std::string& name, PortFlags flags)
-	: _osx_backend (b)
-	, _name  (name)
-	, _flags (flags)
-{
-	_capture_latency_range.min = 0;
-	_capture_latency_range.max = 0;
-	_playback_latency_range.min = 0;
-	_playback_latency_range.max = 0;
-}
-
-ASIOBackendPort::~ASIOBackendPort () {
-	disconnect_all ();
-}
-
-
-int ASIOBackendPort::connect (ASIOBackendPort *port)
-{
-	if (!port) {
-		PBD::error << _("ASIOBackendPort::connect (): invalid (null) port") << endmsg;
-		return -1;
-	}
-
-	if (type () != port->type ()) {
-		PBD::error << _("ASIOBackendPort::connect (): wrong port-type") << endmsg;
-		return -1;
-	}
-
-	if (is_output () && port->is_output ()) {
-		PBD::error << _("ASIOBackendPort::connect (): cannot inter-connect output ports.") << endmsg;
-		return -1;
-	}
-
-	if (is_input () && port->is_input ()) {
-		PBD::error << _("ASIOBackendPort::connect (): cannot inter-connect input ports.") << endmsg;
-		return -1;
-	}
-
-	if (this == port) {
-		PBD::error << _("ASIOBackendPort::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 << _("ASIOBackendPort::connect (): ports are already connected:")
-			<< " (" << name () << ") -> (" << port->name () << ")"
-			<< endmsg;
-#endif
-		return -1;
-	}
-
-	_connect (port, true);
-	return 0;
-}
-
-
-void ASIOBackendPort::_connect (ASIOBackendPort *port, bool callback)
-{
-	_connections.push_back (port);
-	if (callback) {
-		port->_connect (this, false);
-		_osx_backend.port_connect_callback (name(),  port->name(), true);
-	}
-}
-
-int ASIOBackendPort::disconnect (ASIOBackendPort *port)
-{
-	if (!port) {
-		PBD::error << _("ASIOBackendPort::disconnect (): invalid (null) port") << endmsg;
-		return -1;
-	}
-
-	if (!is_connected (port)) {
-		PBD::error << _("ASIOBackendPort::disconnect (): ports are not connected:")
-			<< " (" << name () << ") -> (" << port->name () << ")"
-			<< endmsg;
-		return -1;
-	}
-	_disconnect (port, true);
-	return 0;
-}
-
-void ASIOBackendPort::_disconnect (ASIOBackendPort *port, bool callback)
-{
-	std::vector<ASIOBackendPort*>::iterator it = std::find (_connections.begin (), _connections.end (), port);
-
-	assert (it != _connections.end ());
-
-	_connections.erase (it);
-
-	if (callback) {
-		port->_disconnect (this, false);
-		_osx_backend.port_connect_callback (name(),  port->name(), false);
-	}
-}
-
-
-void ASIOBackendPort::disconnect_all ()
-{
-	while (!_connections.empty ()) {
-		_connections.back ()->_disconnect (this, false);
-		_osx_backend.port_connect_callback (name(),  _connections.back ()->name(), false);
-		_connections.pop_back ();
-	}
-}
-
-bool
-ASIOBackendPort::is_connected (const ASIOBackendPort *port) const
-{
-	return std::find (_connections.begin (), _connections.end (), port) != _connections.end ();
-}
-
-bool ASIOBackendPort::is_physically_connected () const
-{
-	for (std::vector<ASIOBackendPort*>::const_iterator it = _connections.begin (); it != _connections.end (); ++it) {
-		if ((*it)->is_physical ()) {
-			return true;
-		}
-	}
-	return false;
-}
-
-/******************************************************************************/
-
-ASIOPort::ASIOPort (ASIOBackend &b, const std::string& name, PortFlags flags)
-	: ASIOBackendPort (b, name, flags)
-{
-	memset (_buffer, 0, sizeof (_buffer));
-	mlock(_buffer, sizeof (_buffer));
-}
-
-ASIOPort::~ASIOPort () { }
-
-void* ASIOPort::get_buffer (pframes_t n_samples)
-{
-	if (is_input ()) {
-		std::vector<ASIOBackendPort*>::const_iterator it = get_connections ().begin ();
-		if (it == get_connections ().end ()) {
-			memset (_buffer, 0, n_samples * sizeof (Sample));
-		} else {
-			ASIOPort const * source = static_cast<const ASIOPort*>(*it);
-			assert (source && source->is_output ());
-			memcpy (_buffer, source->const_buffer (), n_samples * sizeof (Sample));
-			while (++it != get_connections ().end ()) {
-				source = static_cast<const ASIOPort*>(*it);
-				assert (source && source->is_output ());
-				Sample* dst = buffer ();
-				const Sample* src = source->const_buffer ();
-				for (uint32_t s = 0; s < n_samples; ++s, ++dst, ++src) {
-					*dst += *src;
-				}
-			}
-		}
-	}
-	return _buffer;
-}
-
-
-WindowsMidiPort::WindowsMidiPort (ASIOBackend &b, const std::string& name, PortFlags flags)
-	: ASIOBackendPort (b, name, flags)
-	, _n_periods (1)
-	, _bufperiod (0)
-{
-	_buffer[0].clear ();
-	_buffer[1].clear ();
-}
-
-WindowsMidiPort::~WindowsMidiPort () { }
-
-struct MidiEventSorter {
-	bool operator() (const boost::shared_ptr<WindowsMidiEvent>& a, const boost::shared_ptr<WindowsMidiEvent>& b) {
-		return *a < *b;
-	}
-};
-
-void* WindowsMidiPort::get_buffer (pframes_t /* nframes */)
-{
-	if (is_input ()) {
-		(_buffer[_bufperiod]).clear ();
-		for (std::vector<ASIOBackendPort*>::const_iterator i = get_connections ().begin ();
-				i != get_connections ().end ();
-				++i) {
-			const WindowsMidiBuffer * src = static_cast<const WindowsMidiPort*>(*i)->const_buffer ();
-			for (WindowsMidiBuffer::const_iterator it = src->begin (); it != src->end (); ++it) {
-				(_buffer[_bufperiod]).push_back (boost::shared_ptr<WindowsMidiEvent>(new WindowsMidiEvent (**it)));
-			}
-		}
-		std::sort ((_buffer[_bufperiod]).begin (), (_buffer[_bufperiod]).end (), MidiEventSorter());
-	}
-	return &(_buffer[_bufperiod]);
-}
-
-WindowsMidiEvent::WindowsMidiEvent (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);
-	}
-}
-
-WindowsMidiEvent::WindowsMidiEvent (const WindowsMidiEvent& 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 ());
-	}
-};
-
-WindowsMidiEvent::~WindowsMidiEvent () {
-	free (_data);
-};
diff --git a/libs/backends/asio/asio_backend.h b/libs/backends/asio/asio_backend.h
deleted file mode 100644
index bef158953b..0000000000
--- a/libs/backends/asio/asio_backend.h
+++ /dev/null
@@ -1,434 +0,0 @@
-/*
- * Copyright (C) 2014 Robin Gareus <robin@gareus.org>
- * Copyright (C) 2013 Paul Davis
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-#ifndef __libbackend_asio_backend_h__
-#define __libbackend_asio_backend_h__
-
-#include <string>
-#include <vector>
-#include <map>
-#include <set>
-
-#include <stdint.h>
-#include <pthread.h>
-
-#include <boost/shared_ptr.hpp>
-
-#include "ardour/audio_backend.h"
-#include "ardour/types.h"
-
-namespace ARDOUR {
-
-class ASIOBackend;
-
-class WindowsMidiEvent {
-	public:
-		WindowsMidiEvent (const pframes_t timestamp, const uint8_t* data, size_t size);
-		WindowsMidiEvent (const WindowsMidiEvent& other);
-		~WindowsMidiEvent ();
-		size_t size () const { return _size; };
-		pframes_t timestamp () const { return _timestamp; };
-		const unsigned char* const_data () const { return _data; };
-		unsigned char* data () { return _data; };
-		bool operator< (const WindowsMidiEvent &other) const { return timestamp () < other.timestamp (); };
-	private:
-		size_t _size;
-		pframes_t _timestamp;
-		uint8_t *_data;
-};
-
-typedef std::vector<boost::shared_ptr<WindowsMidiEvent> > WindowsMidiBuffer;
-
-class ASIOBackendPort {
-	protected:
-		ASIOBackendPort (ASIOBackend &b, const std::string&, PortFlags);
-	public:
-		virtual ~ASIOBackendPort ();
-
-		const std::string& name () const { return _name; }
-		const std::string& pretty_name () const { return _pretty_name; }
-		PortFlags flags () const { return _flags; }
-
-		int set_name (const std::string &name) { _name = name; return 0; }
-		int set_pretty_name (const std::string &name) { _pretty_name = name; return 0; }
-
-		virtual DataType type () const = 0;
-
-		bool is_input ()     const { return flags () & IsInput; }
-		bool is_output ()    const { return flags () & IsOutput; }
-		bool is_physical ()  const { return flags () & IsPhysical; }
-		bool is_terminal ()  const { return flags () & IsTerminal; }
-		bool is_connected () const { return _connections.size () != 0; }
-		bool is_connected (const ASIOBackendPort *port) const;
-		bool is_physically_connected () const;
-
-		const std::vector<ASIOBackendPort *>& get_connections () const { return _connections; }
-
-		int connect (ASIOBackendPort *port);
-		int disconnect (ASIOBackendPort *port);
-		void disconnect_all ();
-
-		virtual void* get_buffer (pframes_t nframes) = 0;
-
-		const LatencyRange latency_range (bool for_playback) const
-		{
-			return for_playback ? _playback_latency_range : _capture_latency_range;
-		}
-
-		void set_latency_range (const LatencyRange &latency_range, bool for_playback)
-		{
-			if (for_playback)
-			{
-				_playback_latency_range = latency_range;
-			}
-			else
-			{
-				_capture_latency_range = latency_range;
-			}
-		}
-
-	private:
-		ASIOBackend &_osx_backend;
-		std::string _name;
-		std::string _pretty_name;
-		const PortFlags _flags;
-		LatencyRange _capture_latency_range;
-		LatencyRange _playback_latency_range;
-		std::vector<ASIOBackendPort*> _connections;
-
-		void _connect (ASIOBackendPort* , bool);
-		void _disconnect (ASIOBackendPort* , bool);
-
-}; // class ASIOBackendPort
-
-class ASIOPort : public ASIOBackendPort {
-	public:
-		ASIOPort (ASIOBackend &b, const std::string&, PortFlags);
-		~ASIOPort ();
-
-		DataType type () const { return DataType::AUDIO; };
-
-		Sample* buffer () { return _buffer; }
-		const Sample* const_buffer () const { return _buffer; }
-		void* get_buffer (pframes_t nframes);
-
-	private:
-		Sample _buffer[8192];
-}; // class ASIOPort
-
-class WindowsMidiPort : public ASIOBackendPort {
-	public:
-		WindowsMidiPort (ASIOBackend &b, const std::string&, PortFlags);
-		~WindowsMidiPort ();
-
-		DataType type () const { return DataType::MIDI; };
-
-		void* get_buffer (pframes_t nframes);
-		const WindowsMidiBuffer * const_buffer () const { return & _buffer[_bufperiod]; }
-
-		void next_period() { if (_n_periods > 1) { get_buffer(0); _bufperiod = (_bufperiod + 1) % _n_periods; } }
-		void set_n_periods(int n) { if (n > 0 && n < 3) { _n_periods = n; } }
-
-	private:
-		WindowsMidiBuffer _buffer[2];
-		int _n_periods;
-		int _bufperiod;
-}; // class WindowsMidiPort
-
-class ASIOBackend : public AudioBackend {
-	friend class ASIOBackendPort;
-	public:
-		ASIOBackend (AudioEngine& e, AudioBackendInfo& info);
-		~ASIOBackend ();
-
-		/* AUDIOBACKEND API */
-
-		std::string name () const;
-		bool is_realtime () const;
-
-		std::vector<DeviceStatus> enumerate_devices () const;
-		std::vector<float> available_sample_rates (const std::string& device) const;
-		std::vector<uint32_t> available_buffer_sizes (const std::string& device) const;
-		uint32_t available_input_channel_count (const std::string& device) const;
-		uint32_t available_output_channel_count (const std::string& device) const;
-
-		bool can_change_sample_rate_when_running () const;
-		bool can_change_buffer_size_when_running () const;
-
-		int set_device_name (const std::string&);
-		int set_sample_rate (float);
-		int set_buffer_size (uint32_t);
-		int set_interleaved (bool yn);
-		int set_input_channels (uint32_t);
-		int set_output_channels (uint32_t);
-		int set_systemic_input_latency (uint32_t);
-		int set_systemic_output_latency (uint32_t);
-		int set_systemic_midi_input_latency (std::string const, uint32_t) { return 0; }
-		int set_systemic_midi_output_latency (std::string const, uint32_t) { return 0; }
-
-		int reset_device () { return 0; };
-
-		/* Retrieving parameters */
-		std::string  device_name () const;
-		float        sample_rate () const;
-		uint32_t     buffer_size () const;
-		bool         interleaved () const;
-		uint32_t     input_channels () const;
-		uint32_t     output_channels () const;
-		uint32_t     systemic_input_latency () const;
-		uint32_t     systemic_output_latency () const;
-		uint32_t     systemic_midi_input_latency (std::string const) const { return 0; }
-		uint32_t     systemic_midi_output_latency (std::string const) const { return 0; }
-
-		bool can_set_systemic_midi_latencies () const { return false; /* TODO */}
-
-		/* External control app - TODO */
-		std::string control_app_name () const { return std::string (); /* return std::string ("Windows"); */ }
-		void launch_control_app ();
-
-		/* MIDI */
-		std::vector<std::string> enumerate_midi_options () const;
-		int set_midi_option (const std::string&);
-		std::string midi_option () const;
-
-		std::vector<DeviceStatus> enumerate_midi_devices () const {
-			return std::vector<AudioBackend::DeviceStatus> ();
-		}
-		int set_midi_device_enabled (std::string const, bool) {
-			return true;
-		}
-		bool midi_device_enabled (std::string const) const {
-			return false;
-		}
-
-		// really private, but needing static access:
-		int process_callback(uint32_t, uint64_t);
-		void error_callback();
-		void xrun_callback();
-		void buffer_size_callback();
-		void sample_rate_callback();
-		void hw_changed_callback();
-
-	protected:
-		/* State Control */
-		int _start (bool for_latency_measurement);
-	public:
-		int stop ();
-		int freewheel (bool);
-		float dsp_load () const;
-		size_t raw_buffer_size (DataType t);
-
-		/* Process time */
-		framepos_t sample_time ();
-		framepos_t sample_time_at_cycle_start ();
-		pframes_t samples_since_cycle_start ();
-
-		int create_process_thread (boost::function<void()> func);
-		int join_process_threads ();
-		bool in_process_thread ();
-		uint32_t process_thread_count ();
-
-		void update_latencies ();
-
-		/* PORTENGINE API */
-
-		void* private_handle () const;
-		const std::string& my_name () const;
-		bool available () const;
-		uint32_t port_name_size () const;
-
-		int         set_port_name (PortHandle, const std::string&);
-		std::string get_port_name (PortHandle) const;
-		PortHandle  get_port_by_name (const std::string&) const;
-		int get_port_property (PortHandle, const std::string& key, std::string& value, std::string& type) const;
-
-		int get_ports (const std::string& port_name_pattern, DataType type, PortFlags flags, std::vector<std::string>&) const;
-
-		DataType port_data_type (PortHandle) const;
-
-		PortHandle register_port (const std::string& shortname, ARDOUR::DataType, ARDOUR::PortFlags);
-		void unregister_port (PortHandle);
-
-		int  connect (const std::string& src, const std::string& dst);
-		int  disconnect (const std::string& src, const std::string& dst);
-		int  connect (PortHandle, const std::string&);
-		int  disconnect (PortHandle, const std::string&);
-		int  disconnect_all (PortHandle);
-
-		bool connected (PortHandle, bool process_callback_safe);
-		bool connected_to (PortHandle, const std::string&, bool process_callback_safe);
-		bool physically_connected (PortHandle, bool process_callback_safe);
-		int  get_connections (PortHandle, std::vector<std::string>&, bool process_callback_safe);
-
-		/* MIDI */
-		int midi_event_get (pframes_t& timestamp, size_t& size, uint8_t** buf, void* port_buffer, uint32_t event_index);
-		int midi_event_put (void* port_buffer, pframes_t timestamp, const uint8_t* buffer, size_t size);
-		uint32_t get_midi_event_count (void* port_buffer);
-		void     midi_clear (void* port_buffer);
-
-		/* Monitoring */
-
-		bool can_monitor_input () const;
-		int  request_input_monitoring (PortHandle, bool);
-		int  ensure_input_monitoring (PortHandle, bool);
-		bool monitoring_input (PortHandle);
-
-		/* Latency management */
-
-		void         set_latency_range (PortHandle, bool for_playback, LatencyRange);
-		LatencyRange get_latency_range (PortHandle, bool for_playback);
-
-		/* Discovering physical ports */
-
-		bool      port_is_physical (PortHandle) const;
-		void      get_physical_outputs (DataType type, std::vector<std::string>&);
-		void      get_physical_inputs (DataType type, std::vector<std::string>&);
-		ChanCount n_physical_outputs () const;
-		ChanCount n_physical_inputs () const;
-
-		/* Getting access to the data buffer for a port */
-
-		void* get_buffer (PortHandle, pframes_t);
-
-		void* freewheel_thread ();
-		void pre_process ();
-
-	private:
-		std::string _instance_name;
-		//ASIOPCM *_pcmio; // TODO
-		//WindowsMidiIo *_midiio; // TODO
-
-		bool  _run; /* keep going or stop, ardour thread */
-		bool  _active_cb; /* is running, asio callback */
-		bool  _active_fw; /* is running, freewheel thread */
-		bool  _preinit;
-		bool  _freewheeling;
-		bool  _freewheel;
-		bool  _freewheel_ack;
-		bool  _reinit_thread_callback;
-		bool  _measure_latency;
-
-		uint64_t _last_process_start;
-
-		pthread_mutex_t _process_callback_mutex;
-
-		pthread_mutex_t _freewheel_mutex;
-		pthread_cond_t  _freewheel_signal;
-
-		static std::vector<std::string> _midi_options;
-		static std::vector<AudioBackend::DeviceStatus> _audio_device_status;
-		static std::vector<AudioBackend::DeviceStatus> _midi_device_status;
-
-		mutable std::string _audio_device;
-		std::string _midi_driver_option;
-
-		/* audio settings */
-		float  _samplerate;
-		size_t _samples_per_period;
-		static size_t _max_buffer_size;
-
-		uint32_t _n_inputs;
-		uint32_t _n_outputs;
-
-		uint32_t _systemic_audio_input_latency;
-		uint32_t _systemic_audio_output_latency;
-
-		/* processing */
-		float  _dsp_load;
-		uint64_t _processed_samples;
-
-		pthread_t _main_thread;
-		pthread_t _freeewheel_thread;
-
-		/* process threads */
-		static void* asio_process_thread (void *);
-		std::vector<pthread_t> _threads;
-
-		struct ThreadData {
-			ASIOBackend* engine;
-			boost::function<void ()> f;
-			size_t stacksize;
-
-			ThreadData (ASIOBackend* e, boost::function<void ()> fp, size_t stacksz)
-				: engine (e) , f (fp) , stacksize (stacksz) {}
-		};
-
-		/* port engine */
-		PortHandle add_port (const std::string& shortname, ARDOUR::DataType, ARDOUR::PortFlags);
-		int register_system_audio_ports ();
-		void unregister_ports (bool system_only = false);
-
-		std::vector<ASIOBackendPort *> _ports;
-		std::vector<ASIOBackendPort *> _system_inputs;
-		std::vector<ASIOBackendPort *> _system_outputs;
-		std::vector<ASIOBackendPort *> _system_midi_in;
-		std::vector<ASIOBackendPort *> _system_midi_out;
-
-		struct PortConnectData {
-			std::string a;
-			std::string b;
-			bool c;
-
-			PortConnectData (const std::string& a, const std::string& b, bool c)
-				: a (a) , b (b) , c (c) {}
-		};
-
-		std::vector<PortConnectData *> _port_connection_queue;
-		pthread_mutex_t _port_callback_mutex;
-		bool _port_change_flag;
-
-		void port_connect_callback (const std::string& a, const std::string& b, bool conn) {
-			pthread_mutex_lock (&_port_callback_mutex);
-			_port_connection_queue.push_back(new PortConnectData(a, b, conn));
-			pthread_mutex_unlock (&_port_callback_mutex);
-		}
-
-		void port_connect_add_remove_callback () {
-			pthread_mutex_lock (&_port_callback_mutex);
-			_port_change_flag = true;
-			pthread_mutex_unlock (&_port_callback_mutex);
-		}
-
-		bool valid_port (PortHandle port) const {
-			return std::find (_ports.begin (), _ports.end (), (ASIOBackendPort*)port) != _ports.end ();
-		}
-
-		ASIOBackendPort * find_port (const std::string& port_name) const {
-			for (std::vector<ASIOBackendPort*>::const_iterator it = _ports.begin (); it != _ports.end (); ++it) {
-				if ((*it)->name () == port_name) {
-					return *it;
-				}
-			}
-			return NULL;
-		}
-
-		ASIOBackendPort * find_port_in (std::vector<ASIOBackendPort *> plist, const std::string& port_name) const {
-			for (std::vector<ASIOBackendPort*>::const_iterator it = plist.begin (); it != plist.end (); ++it) {
-				if ((*it)->name () == port_name) {
-					return *it;
-				}
-			}
-			return NULL;
-		}
-
-}; // class ASIOBackend
-
-} // namespace
-
-#endif /* __libbackend_asio_backend_h__ */
diff --git a/libs/backends/asio/rt_thread.h b/libs/backends/asio/rt_thread.h
deleted file mode 100644
index 0535602bf2..0000000000
--- a/libs/backends/asio/rt_thread.h
+++ /dev/null
@@ -1,55 +0,0 @@
-/*
- * Copyright (C) 2014 Robin Gareus <robin@gareus.org>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-#ifndef __libbackend_portaudio_rthread_h__
-#define __libbackend_portaudio_rthread_h__
-
-#include <pthread.h>
-#include <sched.h>
-
-static int
-_realtime_pthread_create (
-		const int policy, int priority, const size_t stacksize,
-		pthread_t *thread,
-		void *(*start_routine) (void *),
-		void *arg)
-{
-	int rv;
-
-	pthread_attr_t attr;
-	struct sched_param parm;
-
-	const int p_min = sched_get_priority_min (policy);
-	const int p_max = sched_get_priority_max (policy);
-	priority += p_max;
-	if (priority > p_max) priority = p_max;
-	if (priority < p_min) priority = p_min;
-	parm.sched_priority = priority;
-
-	pthread_attr_init (&attr);
-	pthread_attr_setschedpolicy (&attr, policy);
-	pthread_attr_setschedparam (&attr, &parm);
-	pthread_attr_setscope (&attr, PTHREAD_SCOPE_SYSTEM);
-	pthread_attr_setinheritsched (&attr, PTHREAD_EXPLICIT_SCHED);
-	pthread_attr_setstacksize (&attr, stacksize);
-	rv = pthread_create (thread, &attr, start_routine, arg);
-	pthread_attr_destroy (&attr);
-	return rv;
-}
-
-#endif
diff --git a/libs/backends/asio/wscript b/libs/backends/asio/wscript
deleted file mode 100644
index fd122192af..0000000000
--- a/libs/backends/asio/wscript
+++ /dev/null
@@ -1,33 +0,0 @@
-#!/usr/bin/env python
-from waflib.extras import autowaf as autowaf
-from waflib import Options
-import os
-import sys
-import re
-
-I18N_PACKAGE = 'asio-backend'
-
-# Mandatory variables
-top = '.'
-out = 'build'
-
-def options(opt):
-    autowaf.set_options(opt)
-
-def configure(conf):
-    autowaf.configure(conf)
-
-def build(bld):
-    obj = bld(features = 'cxx cxxshlib')
-    obj.source = [ 'asio_backend.cc',
-#                  'asio_io.cc',
-#                  'mme_io.cc'
-                 ]
-    obj.includes = ['.']
-    obj.name     = 'asio_backend'
-    obj.target   = 'asio_backend'
-    obj.use      = 'libardour libpbd'
-    obj.install_path  = os.path.join(bld.env['LIBDIR'], 'backends')
-    obj.defines = ['PACKAGE="' + I18N_PACKAGE + '"',
-                   'ARDOURBACKEND_DLL_EXPORTS'
-                  ]