diff --git a/src/modules/meson.build b/src/modules/meson.build
index ed243ace0..efce042fe 100644
--- a/src/modules/meson.build
+++ b/src/modules/meson.build
@@ -21,6 +21,7 @@ module_sources = [
   'module-link-factory.c',
   'module-loopback.c',
   'module-metadata.c',
+  'module-netjack2-driver.c',
   'module-pipe-tunnel.c',
   'module-portal.c',
   'module-profiler.c',
@@ -200,6 +201,14 @@ endif
 
 summary({'ffado-driver': build_module_ffado_driver}, bool_yn: true, section: 'Optional Modules')
 
+pipewire_module_netjack2_driver = shared_library('pipewire-module-netjack2-driver',
+  [ 'module-netjack2-driver.c' ],
+  include_directories : [configinc],
+  install : true,
+  install_dir : modules_install_dir,
+  install_rpath: modules_install_dir,
+  dependencies : [spa_dep, mathlib, dl_lib, pipewire_dep],
+)
 
 pipewire_module_profiler = shared_library('pipewire-module-profiler',
   [ 'module-profiler.c',
diff --git a/src/modules/module-netjack2-driver.c b/src/modules/module-netjack2-driver.c
new file mode 100644
index 000000000..145fbce1c
--- /dev/null
+++ b/src/modules/module-netjack2-driver.c
@@ -0,0 +1,1631 @@
+/* PipeWire */
+/* SPDX-FileCopyrightText: Copyright © 2021 Wim Taymans */
+/* SPDX-License-Identifier: MIT */
+
+#include <string.h>
+#include <stdio.h>
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <signal.h>
+#include <limits.h>
+#include <arpa/inet.h>
+#include <netinet/ip.h>
+#include <netinet/in.h>
+#include <net/if.h>
+#include <math.h>
+
+#include "config.h"
+
+#include <spa/utils/result.h>
+#include <spa/utils/string.h>
+#include <spa/utils/json.h>
+#include <spa/debug/types.h>
+#include <spa/debug/mem.h>
+#include <spa/pod/builder.h>
+#include <spa/param/audio/format-utils.h>
+#include <spa/param/latency-utils.h>
+#include <spa/param/audio/raw.h>
+
+#include <pipewire/impl.h>
+#include <pipewire/i18n.h>
+#include <pipewire/private.h>
+#include <pipewire/thread.h>
+
+#include "module-netjack2/packets.h"
+
+#ifndef IPTOS_DSCP
+#define IPTOS_DSCP_MASK 0xfc
+#define IPTOS_DSCP(x) ((x) & IPTOS_DSCP_MASK)
+#endif
+
+/** \page page_module_netjack2_driver PipeWire Module: Netjack2 driver
+ *
+ * The netjack2-driver module provides a source or sink that is following a
+ * netjack2 driver.
+ *
+ * ## Module Options
+ *
+ * - `driver.mode`: the tunnel mode, sink|source|duplex, default duplex
+ * - `jack.client-name`: the name of the JACK client.
+ * - `local.ifname = <str>`: interface name to use
+ * - `net.ip =<str>`: multicast IP address, default "225.3.19.154"
+ * - `net.port =<int>`: control port, default "19000"
+ * - `net.mtu = <int>`: MTU to use, default 1500
+ * - `net.ttl = <int>`: TTL to use, default 1
+ * - `net.loop = <bool>`: loopback multicast, default false
+ * - `jack.connect`: if jack ports should be connected automatically. Can also be
+ *                   placed per stream.
+ * - `audio.channels`: the number of audio ports. Can also be added to the stream props.
+ * - `midi.ports`: the number of midi ports. Can also be added to the stream props.
+ * - `source.props`: Extra properties for the source filter.
+ * - `sink.props`: Extra properties for the sink filter.
+ *
+ * ## General options
+ *
+ * Options with well-known behavior.
+ *
+ * - \ref PW_KEY_REMOTE_NAME
+ * - \ref PW_KEY_AUDIO_CHANNELS
+ * - \ref SPA_KEY_AUDIO_POSITION
+ * - \ref PW_KEY_NODE_NAME
+ * - \ref PW_KEY_NODE_DESCRIPTION
+ * - \ref PW_KEY_NODE_GROUP
+ * - \ref PW_KEY_NODE_VIRTUAL
+ * - \ref PW_KEY_MEDIA_CLASS
+ * - \ref PW_KEY_TARGET_OBJECT to specify the remote node.name or serial.id to link to
+ *
+ * ## Example configuration of a duplex sink/source
+ *
+ *\code{.unparsed}
+ * context.modules = [
+ * {   name = libpipewire-module-jack-tunnel
+ *     args = {
+ *         #driver.mode      = duplex
+ *         #jack.client-name = PipeWire
+ *         #jack.connect     = true
+ *         #midi.ports       = 0
+ *         #audio.channels   = 2
+ *         #audio.position   = [ FL FR ]
+ *         source.props = {
+ *             # extra sink properties
+ *         }
+ *         sink.props = {
+ *             # extra sink properties
+ *         }
+ *     }
+ * }
+ * ]
+ *\endcode
+ */
+
+#define NAME "netjack2-driver"
+
+PW_LOG_TOPIC_STATIC(mod_topic, "mod." NAME);
+#define PW_LOG_TOPIC_DEFAULT mod_topic
+
+#define MAX_PORTS	128
+
+#define DEFAULT_NET_IP		"225.3.19.154"
+#define DEFAULT_NET_PORT	19000
+#define DEFAULT_NET_TTL		1
+#define DEFAULT_NET_MTU		1500
+#define DEFAULT_NET_LOOP	true
+#define DEFAULT_NET_DSCP	34 /* Default to AES-67 AF41 (34) */
+#define MAX_MTU			9000
+
+#define NETWORK_DEFAULT_LATENCY	5
+#define NETWORK_MAX_LATENCY	30
+
+#define DEFAULT_CLIENT_NAME	"PipeWire"
+#define DEFAULT_CHANNELS	2
+#define DEFAULT_POSITION	"[ FL FR ]"
+#define DEFAULT_MIDI_PORTS	1
+
+#define NETWORK_PROTOCOL 8
+
+#define FOLLOWER_INIT_TIMEOUT	1
+#define FOLLOWER_INIT_RETRY	5
+
+#define MODULE_USAGE	"( remote.name=<remote> ) "				\
+			"( driver.mode=<sink|source|duplex> ) "			\
+			"( local.ifname=<interface name> ) "			\
+			"( net.ip=<ip address to use, default 225.3.19.154> ) "	\
+			"( net.port=<port to use, default 19000> ) "		\
+			"( net.mtu=<MTU to use, default 1500> ) "		\
+			"( net.ttl=<TTL to use, default 1> ) "			\
+			"( net.loop=<loopback, default false> ) "		\
+			"( jack.client-name=<name of the JACK client> ) "	\
+			"( jack.connect=<bool, autoconnect ports> ) "		\
+			"( midi.ports=<number of midi ports> ) "		\
+			"( audio.channels=<number of channels> ) "		\
+			"( audio.position=<channel map> ) "			\
+			"( source.props=<properties> ) "			\
+			"( sink.props=<properties> ) "
+
+
+static const struct spa_dict_item module_props[] = {
+	{ PW_KEY_MODULE_AUTHOR, "Wim Taymans <wim.taymans@gmail.com>" },
+	{ PW_KEY_MODULE_DESCRIPTION, "Create a netjack2 driver" },
+	{ PW_KEY_MODULE_USAGE, MODULE_USAGE },
+	{ PW_KEY_MODULE_VERSION, PACKAGE_VERSION },
+};
+
+struct port {
+	enum spa_direction direction;
+	struct spa_latency_info latency[2];
+	bool latency_changed[2];
+	unsigned int is_midi:1;
+};
+
+struct volume {
+	bool mute;
+	uint32_t n_volumes;
+	float volumes[SPA_AUDIO_MAX_CHANNELS];
+};
+
+struct stream {
+	struct impl *impl;
+
+	enum spa_direction direction;
+	struct pw_properties *props;
+	struct pw_filter *filter;
+	struct spa_hook listener;
+
+	struct spa_audio_info_raw info;
+
+	uint32_t n_midi;
+	uint32_t n_ports;
+	struct port *ports[MAX_PORTS];
+
+	struct volume volume;
+
+	uint32_t active_audio_ports;
+	uint32_t active_midi_ports;
+
+	unsigned int running:1;
+};
+
+struct impl {
+	struct pw_context *context;
+	struct pw_loop *main_loop;
+	struct pw_data_loop *data_loop;
+	struct spa_system *system;
+
+#define MODE_SINK	(1<<0)
+#define MODE_SOURCE	(1<<1)
+#define MODE_DUPLEX	(MODE_SINK|MODE_SOURCE)
+	uint32_t mode;
+	struct pw_properties *props;
+
+	struct pw_impl_module *module;
+
+	struct spa_hook module_listener;
+
+	struct pw_core *core;
+	struct spa_hook core_proxy_listener;
+	struct spa_hook core_listener;
+
+	struct spa_io_position *position;
+
+	struct stream source;
+	struct stream sink;
+
+	uint32_t samplerate;
+	uint64_t frame_time;
+
+	uint32_t pw_xrun;
+	uint32_t nj2_xrun;
+
+	pthread_t thread;
+
+	struct sockaddr_storage dst_addr;
+	socklen_t dst_len;
+	struct sockaddr_storage src_addr;
+	socklen_t src_len;
+
+	struct spa_source *setup_socket;
+	struct spa_source *socket;
+	struct spa_source *timer;
+	uint32_t init_retry;
+
+	struct nj2_session_params params;
+	struct nj2_packet_header sync;
+	uint8_t send_buffer[MAX_MTU];
+	uint8_t recv_buffer[MAX_MTU];
+
+	uint32_t driving;
+
+	unsigned int triggered:1;
+	unsigned int do_disconnect:1;
+	unsigned int done:1;
+	unsigned int new_xrun:1;
+	unsigned int fix_midi:1;
+};
+
+static void reset_volume(struct volume *vol, uint32_t n_volumes)
+{
+	uint32_t i;
+	vol->mute = false;
+	vol->n_volumes = n_volumes;
+	for (i = 0; i < n_volumes; i++)
+		vol->volumes[i] = 1.0f;
+}
+
+static inline void do_volume(float *dst, const float *src, struct volume *vol, uint32_t ch, uint32_t n_samples)
+{
+	float v = vol->mute ? 0.0f : vol->volumes[ch];
+
+	if (v == 0.0f || src == NULL)
+		memset(dst, 0, n_samples * sizeof(float));
+	else if (v == 1.0f)
+		memcpy(dst, src, n_samples * sizeof(float));
+	else {
+		uint32_t i;
+		for (i = 0; i < n_samples; i++)
+			dst[i] = src[i] * v;
+	}
+}
+
+static inline void fix_midi_event(uint8_t *data, size_t size)
+{
+	/* fixup NoteOn with vel 0 */
+	if (size > 2 && (data[0] & 0xF0) == 0x90 && data[2] == 0x00) {
+		data[0] = 0x80 + (data[0] & 0x0F);
+		data[2] = 0x40;
+	}
+}
+
+static void midi_to_netjack2(struct impl *impl, float *dst, float *src, uint32_t n_samples)
+{
+	struct spa_pod *pod;
+	struct spa_pod_sequence *seq;
+	struct spa_pod_control *c;
+
+	if (src == NULL)
+		return;
+
+	if ((pod = spa_pod_from_data(src, n_samples * sizeof(float), 0, n_samples * sizeof(float))) == NULL)
+		return;
+	if (!spa_pod_is_sequence(pod))
+		return;
+
+	seq = (struct spa_pod_sequence*)pod;
+
+	SPA_POD_SEQUENCE_FOREACH(seq, c) {
+		switch(c->type) {
+		case SPA_CONTROL_Midi:
+		{
+			uint8_t *data = SPA_POD_BODY(&c->value);
+			size_t size = SPA_POD_BODY_SIZE(&c->value);
+
+			if (impl->fix_midi)
+				fix_midi_event(data, size);
+
+			break;
+		}
+		default:
+			break;
+		}
+	}
+}
+
+static void netjack2_to_midi(float *dst, float *src, uint32_t size)
+{
+	struct spa_pod_builder b = { 0, };
+	uint32_t i, count;
+	struct spa_pod_frame f;
+
+	count = 0;
+
+	spa_pod_builder_init(&b, dst, size);
+	spa_pod_builder_push_sequence(&b, &f, 0);
+	for (i = 0; i < count; i++) {
+	}
+	spa_pod_builder_pop(&b, &f);
+}
+
+static void stream_destroy(void *d)
+{
+	struct stream *s = d;
+	spa_hook_remove(&s->listener);
+	s->filter = NULL;
+}
+
+static void stream_state_changed(void *d, enum pw_filter_state old,
+		enum pw_filter_state state, const char *error)
+{
+	struct stream *s = d;
+	struct impl *impl = s->impl;
+	switch (state) {
+	case PW_FILTER_STATE_ERROR:
+	case PW_FILTER_STATE_UNCONNECTED:
+		pw_impl_module_schedule_destroy(impl->module);
+		break;
+	case PW_FILTER_STATE_PAUSED:
+		s->running = false;
+		break;
+	case PW_FILTER_STATE_STREAMING:
+		s->running = true;
+		break;
+	default:
+		break;
+	}
+}
+
+static int32_t netjack2_sync_wait(struct impl *impl)
+{
+	struct nj2_packet_header *sync = (struct nj2_packet_header *)impl->recv_buffer;
+	ssize_t len;
+
+	while (true) {
+		if ((len = recv(impl->socket->fd, impl->recv_buffer, impl->params.mtu, 0)) < 0)
+			goto receive_error;
+
+		if (len < (ssize_t)sizeof(*sync))
+			continue;
+
+		if (strcmp(sync->type, "header") != 0)
+			continue;
+		if (ntohl(sync->data_type) != 's')
+			continue;
+		if (ntohl(sync->data_stream) != 's')
+			continue;
+		break;
+	}
+	impl->sync.is_last = ntohl(sync->is_last);
+	impl->sync.frames = ntohl(sync->frames);
+	if (impl->sync.frames == -1)
+		impl->sync.frames = impl->params.period_size;
+
+	return impl->sync.frames;
+
+receive_error:
+	pw_log_warn("recv error: %m");
+	return 0;
+}
+
+struct data_info {
+	void *data;
+	uint32_t id;
+};
+
+static int netjack2_send_sync(struct stream *s, uint32_t nframes)
+{
+	struct impl *impl = s->impl;
+	struct nj2_packet_header *header = (struct nj2_packet_header *)impl->send_buffer;
+	uint32_t i, packet_size, active_ports, is_last;
+	int32_t *p;
+
+	/* we always listen on all ports */
+	active_ports = impl->params.send_audio_channels;
+	packet_size = sizeof(*header) + active_ports * sizeof(int32_t);
+	is_last = impl->params.recv_midi_channels == 0 &&
+                        impl->params.recv_audio_channels == 0 ? 1 : 0;
+
+	header->active_ports = htonl(active_ports);
+	header->frames = htonl(nframes);
+	header->cycle = htonl(impl->sync.cycle);
+	header->sub_cycle = 0;
+	header->data_type = htonl('s');
+	header->is_last = htonl(is_last);
+	header->packet_size = htonl(packet_size);
+	p = SPA_PTROFF(header, sizeof(*header), int32_t);
+	for (i = 0; i < active_ports; i++)
+		p[i] = htonl(i);
+	send(impl->socket->fd, header, packet_size, 0);
+	return 0;
+}
+
+static int netjack2_send_midi(struct stream *s, uint32_t nframes,
+		struct data_info *info, uint32_t n_info)
+{
+	struct impl *impl = s->impl;
+	struct nj2_packet_header *header = (struct nj2_packet_header *)impl->send_buffer;
+	uint32_t i, num_packets, active_ports, data_size, res1, res2, max_size;
+	int32_t *ap;
+
+	if (impl->params.recv_midi_channels <= 0)
+		return 0;
+
+	active_ports = impl->params.recv_midi_channels;
+	ap = SPA_PTROFF(header, sizeof(*header), int32_t);
+
+	data_size = active_ports * sizeof(struct nj2_midi_buffer);
+	memset(ap, 0, data_size);
+
+	max_size = PACKET_AVAILABLE_SIZE(impl->params.mtu);
+
+	res1 = data_size % max_size;
+        res2 = data_size / max_size;
+        num_packets = (res1) ? res2 + 1 : res2;
+
+	header->data_type = htonl('m');
+	header->active_ports = htonl(active_ports);
+	header->num_packets = htonl(num_packets);
+
+	for (i = 0; i < num_packets; i++) {
+		uint32_t is_last = ((i == num_packets - 1) && impl->params.recv_audio_channels == 0) ? 1 : 0;
+		uint32_t packet_size = sizeof(*header) + data_size;
+
+		header->sub_cycle = htonl(i);
+		header->is_last = htonl(is_last);
+                header->packet_size = htonl(packet_size);
+		send(impl->socket->fd, header, packet_size, 0);
+		//nj2_dump_packet_header(header);
+	}
+	return 0;
+}
+
+static int netjack2_send_audio(struct stream *s, uint32_t frames, struct data_info *info, uint32_t n_info)
+{
+	struct impl *impl = s->impl;
+	struct nj2_packet_header *header = (struct nj2_packet_header *)impl->send_buffer;
+	uint32_t i, j, active_ports, num_packets;
+	uint32_t sub_period_size, sub_period_bytes;
+
+	if (impl->params.recv_audio_channels <= 0)
+		return 0;
+
+	active_ports = n_info;
+
+	if (active_ports == 0) {
+		sub_period_size = impl->params.period_size;
+	} else {
+		uint32_t max_size = PACKET_AVAILABLE_SIZE(impl->params.mtu);
+		uint32_t period = (uint32_t) powf(2.f, (uint32_t) (logf((float)max_size /
+				(active_ports * sizeof(float))) / logf(2.f)));
+		sub_period_size = SPA_MIN(period, impl->params.period_size);
+	}
+	sub_period_bytes = sub_period_size * sizeof(float) + sizeof(int32_t);
+	num_packets = impl->params.period_size / sub_period_size;
+
+	header->data_type = htonl('a');
+	header->active_ports = htonl(active_ports);
+	header->num_packets = htonl(num_packets);
+
+	for (i = 0; i < num_packets; i++) {
+		uint32_t is_last = (i == num_packets - 1) ? 1 : 0;
+		uint32_t packet_size = sizeof(*header) + active_ports * sub_period_bytes;
+		int32_t *ap = SPA_PTROFF(header, sizeof(*header), int32_t);
+		float *src;
+
+		for (j = 0; j < active_ports; j++) {
+			ap[0] = htonl(info[j].id);
+
+			src = SPA_PTROFF(info[j].data, i * sub_period_size * sizeof(float), float);
+			do_volume((float*)&ap[1], src, &s->volume, info[j].id, sub_period_size);
+
+			ap = SPA_PTROFF(ap, sub_period_bytes, int32_t);
+		}
+		header->sub_cycle = htonl(i);
+		header->is_last = htonl(is_last);
+		header->packet_size = htonl(packet_size);
+		send(impl->socket->fd, header, packet_size, 0);
+		//nj2_dump_packet_header(header);
+	}
+	return 0;
+}
+
+static int netjack2_send_data(struct stream *s, uint32_t nframes,
+		struct data_info *midi, uint32_t n_midi,
+		struct data_info *audio, uint32_t n_audio)
+{
+	netjack2_send_sync(s, nframes);
+	netjack2_send_midi(s, nframes, midi, n_midi);
+	netjack2_send_audio(s, nframes, audio, n_audio);
+	return 0;
+}
+
+static void sink_process(void *d, struct spa_io_position *position)
+{
+	struct stream *s = d;
+	struct impl *impl = s->impl;
+	uint32_t i, nframes = position->clock.duration;
+	struct data_info midi[s->n_ports];
+	struct data_info audio[s->n_ports];
+	uint32_t n_midi, n_audio;
+
+	if (impl->driving == MODE_SINK && impl->triggered) {
+		impl->triggered = false;
+		return;
+	}
+
+	n_midi = n_audio = 0;
+	for (i = 0; i < s->n_ports; i++) {
+		struct port *p = s->ports[i];
+		void *data = p ? pw_filter_get_dsp_buffer(p, nframes) : NULL;
+		if (p && p->is_midi) {
+			midi[n_midi].data = data;
+			midi[n_midi++].id = i;
+		} else if (data != NULL) {
+			audio[n_audio].data = data;
+			audio[n_audio++].id = i;
+		}
+	}
+
+	netjack2_send_data(s, nframes, midi, n_midi, audio, n_audio);
+
+	pw_log_trace_fp("done %"PRIu64, impl->frame_time);
+	if (impl->driving == MODE_SINK)
+		impl->done = true;
+}
+
+static int netjack2_recv_midi(struct stream *s, struct nj2_packet_header *header, uint32_t *count,
+		struct data_info *info, uint32_t n_info)
+{
+	struct impl *impl = s->impl;
+	ssize_t len;
+
+	if ((len = recv(impl->socket->fd, impl->recv_buffer, ntohl(header->packet_size), 0)) < 0)
+		return -errno;
+
+	impl->sync.is_last = ntohl(header->is_last);
+
+	impl->sync.cycle = ntohl(header->cycle);
+	impl->sync.num_packets = ntohl(header->num_packets);
+
+	if (++(*count) == impl->sync.num_packets) {
+		pw_log_trace_fp("got last midi packet");
+	}
+	return 0;
+}
+
+static int netjack2_recv_audio(struct stream *s, struct nj2_packet_header *header, uint32_t *count,
+		struct data_info *info, uint32_t n_info)
+{
+	struct impl *impl = s->impl;
+	ssize_t len;
+	uint32_t i, sub_cycle, sub_period_size, sub_period_bytes, active_ports;
+
+	if ((len = recv(impl->socket->fd, impl->recv_buffer, ntohl(header->packet_size), 0)) < 0)
+		return -errno;
+
+	impl->sync.is_last = ntohl(header->is_last);
+
+	sub_cycle = ntohl(header->sub_cycle);
+	active_ports = ntohl(header->active_ports);
+
+	if (active_ports == 0) {
+		sub_period_size = impl->params.period_size;
+	} else {
+		uint32_t max_size = PACKET_AVAILABLE_SIZE(impl->params.mtu);
+		uint32_t period = (uint32_t) powf(2.f, (uint32_t) (logf((float)max_size /
+				(active_ports * sizeof(float))) / logf(2.f)));
+		sub_period_size = SPA_MIN(period, impl->params.period_size);
+	}
+	sub_period_bytes = sub_period_size * sizeof(float) + sizeof(int32_t);
+
+	for (i = 0; i < active_ports; i++) {
+		int32_t *ap = SPA_PTROFF(header, sizeof(*header) + i * sub_period_bytes, int32_t);
+		uint32_t active_port = ntohl(ap[0]);
+		void *data;
+
+		pw_log_trace_fp("%u/%u %u %u", active_port, n_info,
+				sub_cycle, sub_period_size);
+		if (active_port >= n_info)
+			continue;
+
+		if ((data = info[active_port].data) != NULL) {
+			float *dst = SPA_PTROFF(data,
+					sub_cycle * sub_period_size * sizeof(float),
+					float);
+			do_volume(dst, (float*)&ap[1], &s->volume, active_port, sub_period_size);
+		}
+	}
+	if (impl->sync.is_last)
+		pw_log_trace_fp("got last audio packet");
+
+	return 0;
+}
+
+static int netjack2_recv_data(struct stream *s, struct data_info *info, uint32_t n_info)
+{
+	struct impl *impl = s->impl;
+	ssize_t len;
+	uint32_t count = 0;
+	struct nj2_packet_header *header = (struct nj2_packet_header *)impl->recv_buffer;
+
+	while (!impl->sync.is_last) {
+		if ((len = recv(impl->socket->fd, impl->recv_buffer, impl->params.mtu, MSG_PEEK)) < 0)
+			goto receive_error;
+
+		if (len < (ssize_t)sizeof(*header))
+			goto receive_error;
+
+		if (ntohl(header->data_stream) != 's' ||
+		    ntohl(header->id) != impl->params.id) {
+			pw_log_debug("not our packet");
+			continue;
+		}
+		//nj2_dump_packet_header(header);
+
+		switch (ntohl(header->data_type)) {
+		case 'm':
+			netjack2_recv_midi(s, header, &count, info, n_info);
+			break;
+		case 'a':
+			netjack2_recv_audio(s, header, &count, info, n_info);
+			break;
+		case 's':
+			pw_log_info("missing last data packet");
+			return 0;
+		}
+	}
+	impl->sync.cycle = ntohl(header->cycle);
+	return 0;
+
+receive_error:
+	pw_log_warn("recv error: %m");
+	return -errno;
+}
+
+static void source_process(void *d, struct spa_io_position *position)
+{
+	struct stream *s = d;
+	struct impl *impl = s->impl;
+	uint32_t i, n_samples = position->clock.duration;
+	struct data_info info[s->n_ports];
+
+	if (impl->driving == MODE_SOURCE && !impl->triggered) {
+		pw_log_trace_fp("done %"PRIu64, impl->frame_time);
+		impl->done = true;
+		return;
+	}
+	impl->triggered = false;
+
+	for (i = 0; i < s->n_ports; i++) {
+		struct port *p = s->ports[i];
+		info[i].data = p ? pw_filter_get_dsp_buffer(p, n_samples) : NULL;
+		info[i].id = i;
+	}
+
+	netjack2_recv_data(s, info, s->n_ports);
+}
+
+static void stream_io_changed(void *data, void *port_data, uint32_t id, void *area, uint32_t size)
+{
+	struct stream *s = data;
+	struct impl *impl = s->impl;
+	if (port_data == NULL) {
+		switch (id) {
+		case SPA_IO_Position:
+			impl->position = area;
+			break;
+		default:
+			break;
+		}
+	}
+}
+
+static void param_latency_changed(struct stream *s, const struct spa_pod *param,
+		struct port *port)
+{
+	struct spa_latency_info latency;
+	bool update = false;
+	enum spa_direction direction = port->direction;
+
+	if (spa_latency_parse(param, &latency) < 0)
+		return;
+
+	if (spa_latency_info_compare(&port->latency[direction], &latency)) {
+		port->latency[direction] = latency;
+		port->latency_changed[direction] = update = true;
+	}
+}
+
+static void make_stream_ports(struct stream *s)
+{
+	uint32_t i;
+	struct pw_properties *props;
+	const char *str, *prefix;
+	char name[256];
+	bool is_midi;
+
+	if (s->direction == PW_DIRECTION_INPUT) {
+		/* sink */
+		prefix = "playback";
+	} else {
+		/* source */
+		prefix = "capture";
+	}
+
+	for (i = 0; i < s->n_ports; i++) {
+		struct port *port = s->ports[i];
+		if (port != NULL) {
+			s->ports[i] = NULL;
+			pw_filter_remove_port(port);
+		}
+
+		if (i < s->info.channels) {
+			str = spa_debug_type_find_short_name(spa_type_audio_channel,
+					s->info.position[i]);
+			if (str)
+				snprintf(name, sizeof(name), "%s_%s", prefix, str);
+			else
+				snprintf(name, sizeof(name), "%s_%d", prefix, i);
+
+			props = pw_properties_new(
+					PW_KEY_FORMAT_DSP, "32 bit float mono audio",
+					PW_KEY_AUDIO_CHANNEL, str ? str : "UNK",
+					PW_KEY_PORT_PHYSICAL, "true",
+					PW_KEY_PORT_NAME, name,
+					NULL);
+
+			is_midi = false;
+		} else {
+			snprintf(name, sizeof(name), "%s_%d", prefix, i - s->info.channels);
+			props = pw_properties_new(
+					PW_KEY_FORMAT_DSP, "8 bit raw midi",
+					PW_KEY_PORT_NAME, name,
+					PW_KEY_PORT_PHYSICAL, "true",
+					NULL);
+
+			is_midi = true;
+		}
+
+		port = pw_filter_add_port(s->filter,
+                        s->direction,
+                        PW_FILTER_PORT_FLAG_MAP_BUFFERS,
+                        sizeof(struct port),
+			props, NULL, 0);
+
+		port->is_midi = is_midi;
+
+		s->ports[i] = port;
+	}
+}
+
+static struct spa_pod *make_props_param(struct spa_pod_builder *b,
+		struct volume *vol)
+{
+	return spa_pod_builder_add_object(b, SPA_TYPE_OBJECT_Props, SPA_PARAM_Props,
+			SPA_PROP_mute, SPA_POD_Bool(vol->mute),
+			SPA_PROP_channelVolumes, SPA_POD_Array(sizeof(float),
+				SPA_TYPE_Float, vol->n_volumes, vol->volumes));
+}
+
+static void parse_props(struct stream *s, const struct spa_pod *param)
+{
+	struct spa_pod_object *obj = (struct spa_pod_object *) param;
+	struct spa_pod_prop *prop;
+	uint8_t buffer[1024];
+	struct spa_pod_builder b;
+	const struct spa_pod *params[1];
+
+	SPA_POD_OBJECT_FOREACH(obj, prop) {
+		switch (prop->key) {
+		case SPA_PROP_mute:
+		{
+			bool mute;
+			if (spa_pod_get_bool(&prop->value, &mute) == 0)
+				s->volume.mute = mute;
+			break;
+		}
+		case SPA_PROP_channelVolumes:
+		{
+			uint32_t n;
+			float vols[SPA_AUDIO_MAX_CHANNELS];
+			if ((n = spa_pod_copy_array(&prop->value, SPA_TYPE_Float,
+					vols, SPA_AUDIO_MAX_CHANNELS)) > 0) {
+				s->volume.n_volumes = n;
+				for (n = 0; n < s->volume.n_volumes; n++)
+					s->volume.volumes[n] = vols[n];
+			}
+			break;
+		}
+		default:
+			break;
+		}
+	}
+	spa_pod_builder_init(&b, buffer, sizeof(buffer));
+	params[0] = make_props_param(&b, &s->volume);
+
+	pw_filter_update_params(s->filter, NULL, params, 1);
+}
+
+static void stream_param_changed(void *data, void *port_data, uint32_t id,
+		const struct spa_pod *param)
+{
+	struct stream *s = data;
+	if (port_data != NULL) {
+		switch (id) {
+		case SPA_PARAM_Latency:
+			param_latency_changed(s, param, port_data);
+			break;
+		}
+	} else {
+		switch (id) {
+		case SPA_PARAM_PortConfig:
+			pw_log_debug("PortConfig");
+			make_stream_ports(s);
+			pw_filter_set_active(s->filter, true);
+			break;
+		case SPA_PARAM_Props:
+			pw_log_debug("Props");
+			parse_props(s, param);
+			break;
+		}
+	}
+}
+
+static const struct pw_filter_events sink_events = {
+	PW_VERSION_FILTER_EVENTS,
+	.destroy = stream_destroy,
+	.state_changed = stream_state_changed,
+	.param_changed = stream_param_changed,
+	.io_changed = stream_io_changed,
+	.process = sink_process
+};
+
+static const struct pw_filter_events source_events = {
+	PW_VERSION_FILTER_EVENTS,
+	.destroy = stream_destroy,
+	.state_changed = stream_state_changed,
+	.param_changed = stream_param_changed,
+	.io_changed = stream_io_changed,
+	.process = source_process,
+};
+
+static int make_stream(struct stream *s, const char *name)
+{
+	struct impl *impl = s->impl;
+	uint32_t n_params;
+	const struct spa_pod *params[4];
+	uint8_t buffer[1024];
+	struct spa_pod_builder b;
+	struct spa_latency_info latency;
+
+	spa_zero(latency);
+	n_params = 0;
+	spa_pod_builder_init(&b, buffer, sizeof(buffer));
+
+	s->filter = pw_filter_new(impl->core, name, s->props);
+	s->props = NULL;
+	if (s->filter == NULL)
+		return -errno;
+
+	if (s->direction == PW_DIRECTION_INPUT) {
+		pw_filter_add_listener(s->filter, &s->listener,
+				&sink_events, s);
+	} else {
+		pw_filter_add_listener(s->filter, &s->listener,
+				&source_events, s);
+	}
+
+	reset_volume(&s->volume, s->info.channels);
+
+	n_params = 0;
+	params[n_params++] = spa_format_audio_raw_build(&b,
+			SPA_PARAM_EnumFormat, &s->info);
+	params[n_params++] = spa_format_audio_raw_build(&b,
+			SPA_PARAM_Format, &s->info);
+	params[n_params++] = make_props_param(&b, &s->volume);
+
+	return pw_filter_connect(s->filter,
+			PW_FILTER_FLAG_INACTIVE |
+			PW_FILTER_FLAG_DRIVER |
+			PW_FILTER_FLAG_RT_PROCESS |
+			PW_FILTER_FLAG_CUSTOM_LATENCY,
+			params, n_params);
+}
+
+static int create_filters(struct impl *impl)
+{
+	int res = 0;
+
+	if (impl->mode & MODE_SINK)
+		res = make_stream(&impl->sink, "JACK Sink");
+
+	if (impl->mode & MODE_SOURCE)
+		res = make_stream(&impl->source, "JACK Source");
+
+	return res;
+}
+
+
+static inline uint64_t get_time_ns(void)
+{
+	struct timespec ts;
+	clock_gettime(CLOCK_MONOTONIC, &ts);
+	return SPA_TIMESPEC_TO_NSEC(&ts);
+}
+
+static void
+on_data_io(void *data, int fd, uint32_t mask)
+{
+	struct impl *impl = data;
+
+	if (mask & (SPA_IO_ERR | SPA_IO_HUP)) {
+		pw_log_warn("error:%08x", mask);
+		return;
+	}
+	if (mask & SPA_IO_IN) {
+		bool source_running, sink_running;
+		uint32_t nframes;
+		uint64_t nsec;
+
+		nframes = netjack2_sync_wait(impl);
+		if (nframes == 0)
+			return;
+
+		nsec = get_time_ns();
+
+		if (!impl->done) {
+			impl->pw_xrun++;
+			impl->new_xrun = true;
+		}
+
+		source_running = impl->source.running;
+		sink_running = impl->sink.running;
+
+		impl->frame_time += nframes;
+
+		pw_log_trace_fp("process %d %u %u %p %"PRIu64, nframes, source_running,
+				sink_running, impl->position, impl->frame_time);
+
+		if (impl->new_xrun) {
+			pw_log_warn("Xrun netjack2:%u PipeWire:%u", impl->nj2_xrun, impl->pw_xrun);
+			impl->new_xrun = false;
+		}
+		if (impl->position) {
+			struct spa_io_clock *c = &impl->position->clock;
+
+			c->nsec = nsec;
+			c->rate = SPA_FRACTION(1, impl->samplerate);
+			c->position = impl->frame_time;
+			c->duration = nframes;
+			c->delay = 0;
+			c->rate_diff = 1.0;
+			c->next_nsec = nsec;
+
+			c->target_rate = c->rate;
+			c->target_duration = c->duration;
+		}
+		if (!source_running)
+			netjack2_recv_data(&impl->sink, NULL, 0);
+
+		if (impl->mode & MODE_SOURCE && source_running) {
+			impl->done = false;
+			impl->triggered = true;
+			impl->driving = MODE_SOURCE;
+			pw_filter_trigger_process(impl->source.filter);
+		} else if (impl->mode == MODE_SINK && sink_running) {
+			impl->done = false;
+			impl->triggered = true;
+			impl->driving = MODE_SINK;
+			pw_filter_trigger_process(impl->sink.filter);
+		} else {
+			sink_running = false;
+			impl->done = true;
+		}
+		if (!sink_running)
+			netjack2_send_data(&impl->sink, nframes, NULL, 0, NULL, 0);
+	}
+}
+
+static int
+do_schedule_destroy(struct spa_loop *loop,
+	bool async, uint32_t seq, const void *data, size_t size, void *user_data)
+{
+	struct impl *impl = user_data;
+	pw_impl_module_schedule_destroy(impl->module);
+	return 0;
+}
+
+void module_schedule_destroy(struct impl *impl)
+{
+	pw_loop_invoke(impl->main_loop, do_schedule_destroy, 1, NULL, 0, false, impl);
+}
+
+static int parse_address(const char *address, uint16_t port,
+		struct sockaddr_storage *addr, socklen_t *len)
+{
+	struct sockaddr_in *sa4 = (struct sockaddr_in*)addr;
+	struct sockaddr_in6 *sa6 = (struct sockaddr_in6*)addr;
+
+	if (inet_pton(AF_INET, address, &sa4->sin_addr) > 0) {
+		sa4->sin_family = AF_INET;
+		sa4->sin_port = htons(port);
+		*len = sizeof(*sa4);
+	} else if (inet_pton(AF_INET6, address, &sa6->sin6_addr) > 0) {
+		sa6->sin6_family = AF_INET6;
+		sa6->sin6_port = htons(port);
+		*len = sizeof(*sa6);
+	} else
+		return -EINVAL;
+
+	return 0;
+}
+
+static bool is_multicast(struct sockaddr *sa, socklen_t salen)
+{
+	if (sa->sa_family == AF_INET) {
+		static const uint32_t ipv4_mcast_mask = 0xe0000000;
+		struct sockaddr_in *sa4 = (struct sockaddr_in*)sa;
+		return (ntohl(sa4->sin_addr.s_addr) & ipv4_mcast_mask) == ipv4_mcast_mask;
+	} else if (sa->sa_family == AF_INET6) {
+		struct sockaddr_in6 *sa6 = (struct sockaddr_in6*)sa;
+		return sa6->sin6_addr.s6_addr[0] == 0xff;
+	}
+	return false;
+}
+
+static int make_socket(struct sockaddr_storage *src, socklen_t src_len,
+		struct sockaddr_storage *dst, socklen_t dst_len,
+		bool loop, int ttl, int dscp)
+{
+	int af, fd, val, res;
+	struct timeval timeout;
+
+	af = src->ss_family;
+	if ((fd = socket(af, SOCK_DGRAM | SOCK_CLOEXEC, 0)) < 0) {
+		pw_log_error("socket failed: %m");
+		return -errno;
+	}
+	val = 1;
+	if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &val, sizeof(val)) < 0) {
+		res = -errno;
+		pw_log_error("setsockopt failed: %m");
+		goto error;
+	}
+
+#ifdef SO_PRIORITY
+	val = 6;
+	if (setsockopt(fd, SOL_SOCKET, SO_PRIORITY, &val, sizeof(val)) < 0)
+		pw_log_warn("setsockopt(SO_PRIORITY) failed: %m");
+#endif
+	timeout.tv_sec = 2;
+	timeout.tv_usec = 0;
+	if (setsockopt(fd, SOL_SOCKET, SO_RCVTIMEO, &timeout, sizeof(timeout)) < 0)
+		pw_log_warn("setsockopt(SO_RCVTIMEO) failed: %m");
+
+	if (dscp > 0) {
+		val = IPTOS_DSCP(dscp << 2);
+		if (setsockopt(fd, IPPROTO_IP, IP_TOS, &val, sizeof(val)) < 0)
+			pw_log_warn("setsockopt(IP_TOS) failed: %m");
+	}
+
+	if (bind(fd, (struct sockaddr*)src, src_len) < 0) {
+		res = -errno;
+		pw_log_error("bind() failed: %m");
+		goto error;
+	}
+	if (is_multicast((struct sockaddr*)dst, dst_len)) {
+		val = loop;
+		if (setsockopt(fd, IPPROTO_IP, IP_MULTICAST_LOOP, &val, sizeof(val)) < 0)
+			pw_log_warn("setsockopt(IP_MULTICAST_LOOP) failed: %m");
+
+		val = ttl;
+		if (setsockopt(fd, IPPROTO_IP, IP_MULTICAST_TTL, &val, sizeof(val)) < 0)
+			pw_log_warn("setsockopt(IP_MULTICAST_TTL) failed: %m");
+	}
+
+	return fd;
+error:
+	close(fd);
+	return res;
+}
+
+static int get_ip(const struct sockaddr_storage *sa, char *ip, size_t len)
+{
+	if (sa->ss_family == AF_INET) {
+		struct sockaddr_in *in = (struct sockaddr_in*)sa;
+		inet_ntop(sa->ss_family, &in->sin_addr, ip, len);
+	} else if (sa->ss_family == AF_INET6) {
+		struct sockaddr_in6 *in = (struct sockaddr_in6*)sa;
+		inet_ntop(sa->ss_family, &in->sin6_addr, ip, len);
+	} else
+		return -EIO;
+	return 0;
+}
+
+static void update_timer(struct impl *impl, uint64_t timeout)
+{
+	struct timespec value, interval;
+	value.tv_sec = 0;
+	value.tv_nsec = timeout ? 1 : 0;
+	interval.tv_sec = timeout;
+	interval.tv_nsec = 0;
+	pw_loop_update_timer(impl->main_loop, impl->timer, &value, &interval, false);
+}
+
+static int handle_follower_setup(struct impl *impl, struct nj2_session_params *params,
+	struct sockaddr_storage *addr, socklen_t addr_len)
+{
+	int res;
+	struct nj2_packet_header *header;
+
+	pw_log_info("got follower setup");
+	nj2_dump_session_params(params);
+
+	impl->params = *params;
+	impl->params.version = ntohl(params->version);
+	impl->params.packet_id = ntohl(params->packet_id);
+	impl->params.mtu = ntohl(params->mtu);
+	impl->params.id = ntohl(params->id);
+	impl->params.transport_sync = ntohl(params->transport_sync);
+	impl->params.send_audio_channels = ntohl(params->send_audio_channels);
+	impl->params.recv_audio_channels = ntohl(params->recv_audio_channels);
+	impl->params.send_midi_channels = ntohl(params->send_midi_channels);
+	impl->params.recv_midi_channels = ntohl(params->recv_midi_channels);
+	impl->params.sample_rate = ntohl(params->sample_rate);
+	impl->params.period_size = ntohl(params->period_size);
+	impl->params.sample_encoder = ntohl(params->sample_encoder);
+	impl->params.kbps = ntohl(params->kbps);
+	impl->params.follower_sync_mode = ntohl(params->follower_sync_mode);
+	impl->params.network_latency = ntohl(params->network_latency);
+
+	update_timer(impl, 0);
+	pw_loop_update_io(impl->main_loop, impl->setup_socket, 0);
+
+	impl->source.n_ports = impl->params.send_audio_channels + impl->params.send_midi_channels;
+	impl->source.info.rate =  impl->params.sample_rate;
+	impl->source.info.channels =  impl->params.send_audio_channels;
+	impl->sink.n_ports = impl->params.recv_audio_channels + impl->params.recv_midi_channels;
+	impl->sink.info.rate =  impl->params.sample_rate;
+	impl->sink.info.channels =  impl->params.recv_audio_channels;
+	impl->samplerate = impl->params.sample_rate;
+
+	header = (struct nj2_packet_header *)impl->send_buffer;
+	snprintf(header->type, sizeof(header->type), "header");
+	header->data_stream = htonl('r');
+	header->id = params->id;
+
+	if ((res = create_filters(impl)) < 0)
+		return res;
+
+	if (connect(impl->setup_socket->fd, (struct sockaddr*)addr, addr_len) < 0)
+		goto connect_error;
+
+	impl->done = true;
+	pw_loop_update_io(impl->data_loop->loop, impl->socket, SPA_IO_IN);
+
+	params->packet_id = htonl(NJ2_ID_START_DRIVER);
+	send(impl->socket->fd, params, sizeof(*params), 0);
+
+	return 0;
+
+connect_error:
+	pw_log_error("connect() failed: %m");
+	return -errno;
+}
+
+static int handle_packet(struct impl *impl, void *data, int len,
+	struct sockaddr_storage *addr, socklen_t addr_len)
+{
+	struct nj2_session_params *params;
+
+	if (len < (int)sizeof(struct nj2_session_params))
+		goto short_packet;
+
+	params = data;
+	if (strcmp(params->type, impl->params.type) != 0) {
+		pw_log_info("wrong packet type '%s' != '%s'",
+				params->type, impl->params.type);
+		return -EINVAL;
+	}
+	if (ntohl(params->packet_id) != NJ2_ID_FOLLOWER_SETUP) {
+		pw_log_info("wrong packet id %d != %d",
+				htonl(params->packet_id), NJ2_ID_FOLLOWER_SETUP);
+		return -EINVAL;
+	}
+	return handle_follower_setup(impl, data, addr, addr_len);
+
+short_packet:
+	pw_log_warn("short packet received");
+	return -EIO;
+}
+
+static void
+on_socket_io(void *data, int fd, uint32_t mask)
+{
+	struct impl *impl = data;
+	ssize_t len;
+	uint8_t buffer[2048];
+	struct sockaddr_storage addr;
+	socklen_t addr_len;
+
+	if (mask & SPA_IO_IN) {
+		if ((len = recvfrom(fd, buffer, sizeof(buffer), 0,
+				(struct sockaddr *)&addr, &addr_len)) < 0)
+			goto receive_error;
+
+		handle_packet(impl, (void *)buffer, len, &addr, addr_len);
+	}
+	return;
+
+receive_error:
+	pw_log_warn("recv error: %m");
+	return;
+}
+
+static int send_follower_available(struct impl *impl)
+{
+	pw_loop_update_io(impl->main_loop, impl->setup_socket, SPA_IO_IN);
+
+	pw_log_info("sending AVAILABLE");
+	impl->params.packet_id = htonl(NJ2_ID_FOLLOWER_AVAILABLE);
+	sendto(impl->setup_socket->fd, &impl->params, sizeof(impl->params), 0,
+			(struct sockaddr*)&impl->dst_addr, impl->dst_len);
+	return 0;
+}
+
+static void on_timer_event(void *data, uint64_t expirations)
+{
+	struct impl *impl = data;
+
+	if (--impl->init_retry == 0) {
+		pw_log_error("timeout in connect");
+		update_timer(impl, 0);
+		return;
+	}
+	send_follower_available(impl);
+}
+
+static int create_netjack2_socket(struct impl *impl)
+{
+	const char *client_name, *str;
+	uint32_t port;
+	int fd, res;
+	bool loop;
+	int ttl, dscp, mtu;
+
+	port = pw_properties_get_uint32(impl->props, "net.port", 0);
+	if (port == 0)
+		port = DEFAULT_NET_PORT;
+	if ((str = pw_properties_get(impl->props, "net.ip")) == NULL)
+		str = DEFAULT_NET_IP;
+	if ((res = parse_address(str, port, &impl->dst_addr, &impl->dst_len)) < 0) {
+		pw_log_error("invalid net.ip %s: %s", str, spa_strerror(res));
+		goto out;
+	}
+	if ((res = parse_address("0.0.0.0", 0, &impl->src_addr, &impl->src_len)) < 0) {
+		pw_log_error("invalid source.ip: %s", spa_strerror(res));
+		goto out;
+	}
+
+	mtu = pw_properties_get_uint32(impl->props, "net.mtu", DEFAULT_NET_MTU);
+	ttl = pw_properties_get_uint32(impl->props, "net.ttl", DEFAULT_NET_TTL);
+	loop = pw_properties_get_bool(impl->props, "net.loop", DEFAULT_NET_LOOP);
+	dscp = pw_properties_get_uint32(impl->props, "net.dscp", DEFAULT_NET_DSCP);
+
+	fd = make_socket(&impl->src_addr, impl->src_len,
+			&impl->dst_addr, impl->dst_len, loop, ttl, dscp);
+	if (fd < 0) {
+		res = -errno;
+		pw_log_error("can't create socket: %s", spa_strerror(res));
+		goto out;
+	}
+
+	impl->setup_socket = pw_loop_add_io(impl->main_loop, fd,
+				0, true, on_socket_io, impl);
+	if (impl->setup_socket == NULL) {
+		res = -errno;
+		pw_log_error("can't create setup source: %m");
+		close(fd);
+		goto out;
+	}
+	impl->socket = pw_loop_add_io(impl->data_loop->loop, fd,
+			0, false, on_data_io, impl);
+	if (impl->socket == NULL) {
+		res = -errno;
+		pw_log_error("can't create data source: %m");
+		goto out;
+	}
+
+	impl->init_retry = FOLLOWER_INIT_RETRY;
+	impl->timer = pw_loop_add_timer(impl->main_loop, on_timer_event, impl);
+	if (impl->timer == NULL) {
+		res = -errno;
+		pw_log_error("can't create timer source: %m");
+		goto out;
+	}
+	update_timer(impl, FOLLOWER_INIT_TIMEOUT);
+
+	client_name = pw_properties_get(impl->props, "jack.client-name");
+	if (client_name == NULL)
+		client_name = DEFAULT_CLIENT_NAME;
+
+	strcpy(impl->params.type, "params");
+	impl->params.version = htonl(NETWORK_PROTOCOL);
+	snprintf(impl->params.name, sizeof(impl->params.name), "%s", client_name);
+	impl->params.mtu = htonl(mtu);
+	impl->params.sample_encoder = htonl(NJ2_ENCODER_FLOAT);
+	get_ip(&impl->src_addr, impl->params.follower_name, sizeof(impl->params.follower_name));
+	impl->params.transport_sync = htonl(0);
+        impl->params.network_latency = htonl(NETWORK_DEFAULT_LATENCY);
+	impl->params.follower_sync_mode = htonl(1);
+	impl->params.send_audio_channels = htonl(-1);
+	impl->params.recv_audio_channels = htonl(-1);
+	impl->params.send_midi_channels = htonl(-1);
+	impl->params.recv_midi_channels = htonl(-1);
+
+	return 0;
+out:
+	return res;
+}
+
+static int send_stop_driver(struct impl *impl)
+{
+	pw_log_info("sending STOP_DRIVER");
+	impl->params.packet_id = htonl(NJ2_ID_STOP_DRIVER);
+	sendto(impl->setup_socket->fd, &impl->params, sizeof(impl->params), 0,
+			(struct sockaddr*)&impl->dst_addr, impl->dst_len);
+	return 0;
+}
+
+static int destroy_netjack2_socket(struct impl *impl)
+{
+	if (impl->socket) {
+		pw_loop_destroy_source(impl->data_loop->loop, impl->socket);
+		impl->socket = NULL;
+	}
+	if (impl->setup_socket) {
+		send_stop_driver(impl);
+		pw_loop_destroy_source(impl->main_loop, impl->setup_socket);
+		impl->setup_socket = NULL;
+	}
+	if (impl->timer) {
+		pw_loop_destroy_source(impl->main_loop, impl->timer);
+		impl->timer = NULL;
+	}
+	return 0;
+}
+
+
+static void core_error(void *data, uint32_t id, int seq, int res, const char *message)
+{
+	struct impl *impl = data;
+
+	pw_log_error("error id:%u seq:%d res:%d (%s): %s",
+			id, seq, res, spa_strerror(res), message);
+
+	if (id == PW_ID_CORE && res == -EPIPE)
+		pw_impl_module_schedule_destroy(impl->module);
+}
+
+static const struct pw_core_events core_events = {
+	PW_VERSION_CORE_EVENTS,
+	.error = core_error,
+};
+
+static void core_destroy(void *d)
+{
+	struct impl *impl = d;
+	spa_hook_remove(&impl->core_listener);
+	impl->core = NULL;
+	pw_impl_module_schedule_destroy(impl->module);
+}
+
+static const struct pw_proxy_events core_proxy_events = {
+	.destroy = core_destroy,
+};
+
+static void impl_destroy(struct impl *impl)
+{
+	destroy_netjack2_socket(impl);
+
+	if (impl->source.filter)
+		pw_filter_destroy(impl->source.filter);
+	if (impl->sink.filter)
+		pw_filter_destroy(impl->sink.filter);
+	if (impl->core && impl->do_disconnect)
+		pw_core_disconnect(impl->core);
+
+	pw_properties_free(impl->sink.props);
+	pw_properties_free(impl->source.props);
+	pw_properties_free(impl->props);
+
+	free(impl);
+}
+
+static void module_destroy(void *data)
+{
+	struct impl *impl = data;
+	spa_hook_remove(&impl->module_listener);
+	impl_destroy(impl);
+}
+
+static const struct pw_impl_module_events module_events = {
+	PW_VERSION_IMPL_MODULE_EVENTS,
+	.destroy = module_destroy,
+};
+
+static uint32_t channel_from_name(const char *name)
+{
+	int i;
+	for (i = 0; spa_type_audio_channel[i].name; i++) {
+		if (spa_streq(name, spa_debug_type_short_name(spa_type_audio_channel[i].name)))
+			return spa_type_audio_channel[i].type;
+	}
+	return SPA_AUDIO_CHANNEL_UNKNOWN;
+}
+
+static void parse_position(struct spa_audio_info_raw *info, const char *val, size_t len)
+{
+	struct spa_json it[2];
+	char v[256];
+
+	spa_json_init(&it[0], val, len);
+        if (spa_json_enter_array(&it[0], &it[1]) <= 0)
+                spa_json_init(&it[1], val, len);
+
+	info->channels = 0;
+	while (spa_json_get_string(&it[1], v, sizeof(v)) > 0 &&
+	    info->channels < SPA_AUDIO_MAX_CHANNELS) {
+		info->position[info->channels++] = channel_from_name(v);
+	}
+}
+
+static void parse_audio_info(const struct pw_properties *props, struct spa_audio_info_raw *info)
+{
+	const char *str;
+
+	spa_zero(*info);
+	info->format = SPA_AUDIO_FORMAT_F32P;
+	info->rate = 0;
+	info->channels = pw_properties_get_uint32(props, PW_KEY_AUDIO_CHANNELS, info->channels);
+	info->channels = SPA_MIN(info->channels, SPA_AUDIO_MAX_CHANNELS);
+	if ((str = pw_properties_get(props, SPA_KEY_AUDIO_POSITION)) != NULL)
+		parse_position(info, str, strlen(str));
+	if (info->channels == 0)
+		parse_position(info, DEFAULT_POSITION, strlen(DEFAULT_POSITION));
+}
+
+static void copy_props(struct impl *impl, struct pw_properties *props, const char *key)
+{
+	const char *str;
+	if ((str = pw_properties_get(props, key)) != NULL) {
+		if (pw_properties_get(impl->sink.props, key) == NULL)
+			pw_properties_set(impl->sink.props, key, str);
+		if (pw_properties_get(impl->source.props, key) == NULL)
+			pw_properties_set(impl->source.props, key, str);
+	}
+}
+
+SPA_EXPORT
+int pipewire__module_init(struct pw_impl_module *module, const char *args)
+{
+	struct pw_context *context = pw_impl_module_get_context(module);
+	struct pw_properties *props = NULL;
+	struct impl *impl;
+	const char *str;
+	int res;
+
+	PW_LOG_TOPIC_INIT(mod_topic);
+
+	impl = calloc(1, sizeof(struct impl));
+	if (impl == NULL)
+		return -errno;
+
+	pw_log_debug("module %p: new %s", impl, args);
+
+	if (args == NULL)
+		args = "";
+
+	props = pw_properties_new_string(args);
+	if (props == NULL) {
+		res = -errno;
+		pw_log_error( "can't create properties: %m");
+		goto error;
+	}
+	impl->props = props;
+	impl->data_loop = pw_context_get_data_loop(context);
+
+	impl->sink.props = pw_properties_new(NULL, NULL);
+	impl->source.props = pw_properties_new(NULL, NULL);
+	if (impl->source.props == NULL || impl->sink.props == NULL) {
+		res = -errno;
+		pw_log_error( "can't create properties: %m");
+		goto error;
+	}
+
+	impl->module = module;
+	impl->context = context;
+	impl->main_loop = pw_context_get_main_loop(context);
+	impl->system = impl->main_loop->system;
+
+	impl->source.impl = impl;
+	impl->source.direction = PW_DIRECTION_OUTPUT;
+	impl->sink.impl = impl;
+	impl->sink.direction = PW_DIRECTION_INPUT;
+
+	impl->mode = MODE_DUPLEX;
+	if ((str = pw_properties_get(props, "tunnel.mode")) != NULL) {
+		if (spa_streq(str, "source")) {
+			impl->mode = MODE_SOURCE;
+		} else if (spa_streq(str, "sink")) {
+			impl->mode = MODE_SINK;
+		} else if (spa_streq(str, "duplex")) {
+			impl->mode = MODE_DUPLEX;
+		} else {
+			pw_log_error("invalid tunnel.mode '%s'", str);
+			res = -EINVAL;
+			goto error;
+		}
+	}
+
+	if (pw_properties_get(props, PW_KEY_NODE_VIRTUAL) == NULL)
+		pw_properties_set(props, PW_KEY_NODE_VIRTUAL, "true");
+	if (pw_properties_get(props, PW_KEY_NODE_GROUP) == NULL)
+		pw_properties_set(props, PW_KEY_NODE_GROUP, "jack-group");
+	if (pw_properties_get(props, PW_KEY_NODE_ALWAYS_PROCESS) == NULL)
+		pw_properties_set(props, PW_KEY_NODE_ALWAYS_PROCESS, "true");
+
+	pw_properties_set(impl->sink.props, PW_KEY_MEDIA_CLASS, "Audio/Sink");
+	pw_properties_set(impl->sink.props, PW_KEY_PRIORITY_DRIVER, "40000");
+	pw_properties_set(impl->sink.props, PW_KEY_NODE_NAME, "jack_sink");
+	pw_properties_set(impl->sink.props, PW_KEY_NODE_DESCRIPTION, "JACK Sink");
+
+	pw_properties_set(impl->source.props, PW_KEY_MEDIA_CLASS, "Audio/Source");
+	pw_properties_set(impl->source.props, PW_KEY_PRIORITY_DRIVER, "40001");
+	pw_properties_set(impl->source.props, PW_KEY_NODE_NAME, "jack_source");
+	pw_properties_set(impl->source.props, PW_KEY_NODE_DESCRIPTION, "JACK Source");
+
+	if ((str = pw_properties_get(props, "sink.props")) != NULL)
+		pw_properties_update_string(impl->sink.props, str, strlen(str));
+	if ((str = pw_properties_get(props, "source.props")) != NULL)
+		pw_properties_update_string(impl->source.props, str, strlen(str));
+
+	copy_props(impl, props, PW_KEY_AUDIO_CHANNELS);
+	copy_props(impl, props, SPA_KEY_AUDIO_POSITION);
+	copy_props(impl, props, PW_KEY_NODE_ALWAYS_PROCESS);
+	copy_props(impl, props, PW_KEY_NODE_GROUP);
+	copy_props(impl, props, PW_KEY_NODE_VIRTUAL);
+
+	parse_audio_info(impl->source.props, &impl->source.info);
+	parse_audio_info(impl->sink.props, &impl->sink.info);
+
+	impl->source.n_midi = pw_properties_get_uint32(impl->source.props,
+			"midi.ports", DEFAULT_MIDI_PORTS);
+	impl->sink.n_midi = pw_properties_get_uint32(impl->sink.props,
+			"midi.ports", DEFAULT_MIDI_PORTS);
+
+	impl->source.n_ports = impl->source.n_midi + impl->source.info.channels;
+	impl->sink.n_ports = impl->sink.n_midi + impl->sink.info.channels;
+	if (impl->source.n_ports > MAX_PORTS || impl->sink.n_ports > MAX_PORTS) {
+		pw_log_error("too many ports");
+		res = -EINVAL;
+		goto error;
+	}
+
+	impl->core = pw_context_get_object(impl->context, PW_TYPE_INTERFACE_Core);
+	if (impl->core == NULL) {
+		str = pw_properties_get(props, PW_KEY_REMOTE_NAME);
+		impl->core = pw_context_connect(impl->context,
+				pw_properties_new(
+					PW_KEY_REMOTE_NAME, str,
+					NULL),
+				0);
+		impl->do_disconnect = true;
+	}
+	if (impl->core == NULL) {
+		res = -errno;
+		pw_log_error("can't connect: %m");
+		goto error;
+	}
+
+	pw_proxy_add_listener((struct pw_proxy*)impl->core,
+			&impl->core_proxy_listener,
+			&core_proxy_events, impl);
+	pw_core_add_listener(impl->core,
+			&impl->core_listener,
+			&core_events, impl);
+
+	if ((res = create_netjack2_socket(impl)) < 0)
+		goto error;
+
+	pw_impl_module_add_listener(module, &impl->module_listener, &module_events, impl);
+
+	pw_impl_module_update_properties(module, &SPA_DICT_INIT_ARRAY(module_props));
+
+	return 0;
+
+error:
+	impl_destroy(impl);
+	return res;
+}
diff --git a/src/modules/module-netjack2/packets.h b/src/modules/module-netjack2/packets.h
new file mode 100644
index 000000000..ac4f5497c
--- /dev/null
+++ b/src/modules/module-netjack2/packets.h
@@ -0,0 +1,127 @@
+/* PipeWire */
+/* SPDX-FileCopyrightText: Copyright © 2023 Wim Taymans <wim.taymans@gmail.com> */
+/* SPDX-License-Identifier: MIT */
+
+#ifndef PIPEWIRE_NETJACK2_H
+#define PIPEWIRE_NETJACK2_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define JACK_CLIENT_NAME_SIZE	64
+#define JACK_SERVER_NAME_SIZE	256
+
+struct nj2_session_params {
+	char type[8];					/* packet type ('param') */
+	uint32_t version;				/* version */
+#define NJ2_ID_FOLLOWER_AVAILABLE	0		/* a follower is available */
+#define NJ2_ID_FOLLOWER_SETUP		1		/* follower configuration */
+#define NJ2_ID_START_DRIVER		2		/* follower is ready, start driver */
+#define NJ2_ID_START_FOLLOWER		3		/* driver is ready, activate follower */
+#define NJ2_ID_STOP_DRIVER		4		/* driver must stop */
+	int32_t packet_id;				/* indicates the packet type */
+	char name[JACK_CLIENT_NAME_SIZE];		/* follower's name */
+	char driver_name[JACK_SERVER_NAME_SIZE];	/* driver hostname (network) */
+	char follower_name[JACK_SERVER_NAME_SIZE];	/* follower hostname (network) */
+	uint32_t mtu;					/* connection mtu */
+	uint32_t id;					/* follower's ID */
+	uint32_t transport_sync;			/* is the transport synced ? */
+	int32_t send_audio_channels;			/* number of driver->follower channels */
+	int32_t recv_audio_channels;			/* number of follower->driver channels */
+	int32_t send_midi_channels;			/* number of driver->follower midi channels */
+	int32_t recv_midi_channels;			/* number of follower->driver midi channels */
+	uint32_t sample_rate;				/* session sample rate */
+	uint32_t period_size;				/* period size */
+#define NJ2_ENCODER_FLOAT	0
+#define NJ2_ENCODER_INT		1
+#define NJ2_ENCODER_CELT	2
+#define NJ2_ENCODER_OPUS	3
+	uint32_t sample_encoder;			/* samples encoder */
+	uint32_t kbps;					/* KB per second for CELT encoder */
+	uint32_t follower_sync_mode;			/* is the follower in sync mode ? */
+	uint32_t network_latency;			/* network latency */
+} __attribute__ ((packed));
+
+static inline void nj2_dump_session_params(struct nj2_session_params *params)
+{
+	pw_log_info("Type:          '%s'", params->type);
+	pw_log_info("Version:       %u", ntohl(params->version));
+	pw_log_info("packet ID:     %d", ntohl(params->packet_id));
+	pw_log_info("Name:          '%s'", params->name);
+	pw_log_info("Driver Name:   '%s'", params->driver_name);
+	pw_log_info("Follower Name: '%s'", params->follower_name);
+	pw_log_info("MTU:           %u", ntohl(params->mtu));
+	pw_log_info("ID:            %u", ntohl(params->id));
+	pw_log_info("TransportSync: %u", ntohl(params->transport_sync));
+	pw_log_info("Audio Send:    %d", ntohl(params->send_audio_channels));
+	pw_log_info("Audio Recv:    %d", ntohl(params->recv_audio_channels));
+	pw_log_info("MIDI Send:     %d", ntohl(params->send_midi_channels));
+	pw_log_info("MIDI Recv:     %d", ntohl(params->recv_midi_channels));
+	pw_log_info("Sample Rate:   %u", ntohl(params->sample_rate));
+	pw_log_info("Period Size:   %u", ntohl(params->period_size));
+	pw_log_info("Encoder:       %u", ntohl(params->sample_encoder));
+	pw_log_info("KBps:          %u", ntohl(params->kbps));
+	pw_log_info("Follower Sync: %u", ntohl(params->follower_sync_mode));
+	pw_log_info("Latency:       %u", ntohl(params->network_latency));
+}
+
+struct nj2_packet_header {
+	char type[8];			/* packet type ('headr') */
+	uint32_t data_type;		/* 'a' for audio, 'm' for midi and 's' for sync */
+	uint32_t data_stream;		/* 's' for send, 'r' for return */
+	uint32_t id;			/* unique ID of the follower */
+	uint32_t num_packets;		/* number of data packets of the cycle */
+	uint32_t packet_size;		/* packet size in bytes */
+	uint32_t active_ports;		/* number of active ports */
+	uint32_t cycle;			/* process cycle counter */
+	uint32_t sub_cycle;		/* midi/audio subcycle counter */
+	int32_t frames;			/* process cycle size in frames (can be -1 to indicate entire buffer) */
+	uint32_t is_last;		/* is it the last packet of a given cycle ('y' or 'n') */
+} __attribute__ ((packed));
+
+#define UDP_HEADER_SIZE 64		/* 40 bytes for IP header in IPV6, 20 in IPV4, 8 for UDP, so take 64 */
+
+#define PACKET_AVAILABLE_SIZE(mtu) (mtu - UDP_HEADER_SIZE - sizeof(struct nj2_packet_header))
+
+static inline void nj2_dump_packet_header(struct nj2_packet_header *header)
+{
+	pw_log_info("Type:         %s", header->type);
+	pw_log_info("Data Type:    %c", ntohl(header->data_type));
+	pw_log_info("Data Stream:  %c", ntohl(header->data_stream));
+	pw_log_info("ID:           %u", ntohl(header->id));
+	pw_log_info("Num Packets:  %u", ntohl(header->num_packets));
+	pw_log_info("Packet Size:  %u", ntohl(header->packet_size));
+	pw_log_info("Active Ports: %u", ntohl(header->active_ports));
+	pw_log_info("Cycle:        %u", ntohl(header->cycle));
+	pw_log_info("Sub Cycle:    %u", ntohl(header->sub_cycle));
+	pw_log_info("Frames        %d", ntohl(header->frames));
+	pw_log_info("Is Last:      %u", ntohl(header->is_last));
+}
+
+struct nj2_midi_event {
+	uint32_t time;		/**< Sample index at which event is valid */
+	uint32_t size;		/**< Number of bytes of data in the event */
+	union {
+		uint32_t offset;	/**< offset in buffer */
+		uint8_t	buffer[4];	/**< Raw inline data */
+	};
+};
+
+struct nj2_midi_buffer {
+#define MIDI_BUFFER_MAGIC 0x900df00d
+	uint32_t magic;
+	int32_t buffer_size;
+	uint32_t nframes;
+	int32_t write_pos;
+	uint32_t event_count;
+	uint32_t lost_events;
+
+	struct nj2_midi_event event[1];
+};
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* PIPEWIRE_NETJACK2_H */