Adding upstream version 0.3.65.upstream/0.3.65upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 924 insertions, 0 deletions

diff --git a/spa/plugins/jack/jack-sink.c b/spa/plugins/jack/jack-sink.c
new file mode 100644
index 0000000..e9ca5a8
--- /dev/null
+++ b/spa/plugins/jack/jack-sink.c
@@ -0,0 +1,924 @@
+/* Spa jack client
+ *
+ * Copyright © 2019 Wim Taymans
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#include <errno.h>
+#include <stddef.h>
+#include <unistd.h>
+#include <string.h>
+#include <stdio.h>
+
+#include <jack/jack.h>
+
+#include <spa/support/plugin.h>
+#include <spa/support/log.h>
+#include <spa/support/loop.h>
+#include <spa/utils/list.h>
+#include <spa/utils/keys.h>
+#include <spa/utils/names.h>
+#include <spa/utils/string.h>
+#include <spa/node/node.h>
+#include <spa/node/utils.h>
+#include <spa/node/io.h>
+#include <spa/node/keys.h>
+#include <spa/param/audio/format-utils.h>
+#include <spa/param/param.h>
+#include <spa/pod/filter.h>
+
+#include "jack-client.h"
+
+#define NAME "jack-sink"
+
+#define MAX_PORTS 128
+#define MAX_BUFFERS 8
+#define MAX_SAMPLES 8192
+
+struct buffer {
+	uint32_t id;
+#define BUFFER_FLAG_OUT (1<<0)
+	uint32_t flags;
+	struct spa_buffer *outbuf;
+	struct spa_list link;
+};
+
+struct port {
+	uint32_t id;
+
+	uint64_t info_all;
+	struct spa_port_info info;
+	struct spa_dict_item items[4];
+	struct spa_dict props;
+	struct spa_param_info params[5];
+
+	unsigned int have_format:1;
+	struct spa_audio_info current_format;
+	int stride;
+
+	struct spa_io_buffers *io;
+
+	struct buffer buffers[MAX_BUFFERS];
+	uint32_t n_buffers;
+
+	jack_port_t *jack_port;
+};
+
+struct impl {
+	struct spa_handle handle;
+	struct spa_node node;
+
+	struct spa_log *log;
+	struct spa_loop *data_loop;
+
+	uint64_t info_all;
+	struct spa_node_info info;
+	struct spa_param_info params[5];
+
+	struct spa_hook_list hooks;
+	struct spa_callbacks callbacks;
+
+	struct spa_io_clock *clock;
+	struct spa_io_position *position;
+
+	struct port in_ports[MAX_PORTS];
+	uint32_t n_in_ports;
+
+	struct spa_audio_info current_format;
+
+	struct spa_jack_client *client;
+	struct spa_hook client_listener;
+
+	unsigned int started:1;
+};
+
+#define CHECK_IN_PORT(this,p)		((p) < this->n_in_ports)
+#define CHECK_PORT(this,d,p)		(d == SPA_DIRECTION_INPUT && CHECK_IN_PORT(this,p))
+#define GET_IN_PORT(this,p)		(&this->in_ports[p])
+#define GET_PORT(this,d,p)		GET_IN_PORT(this,p)
+
+static int impl_node_enum_params(void *object, int seq,
+				 uint32_t id, uint32_t start, uint32_t num,
+				 const struct spa_pod *filter)
+{
+	struct impl *this = object;
+	struct spa_pod *param;
+	struct spa_pod_builder b = { 0 };
+	uint8_t buffer[1024];
+	struct spa_result_node_params result;
+	uint32_t count = 0;
+
+	spa_return_val_if_fail(this != NULL, -EINVAL);
+	spa_return_val_if_fail(num != 0, -EINVAL);
+
+	result.id = id;
+	result.next = start;
+      next:
+	result.index = result.next++;
+
+	spa_pod_builder_init(&b, buffer, sizeof(buffer));
+
+	switch (id) {
+	case SPA_PARAM_PropInfo:
+		return 0;
+
+	case SPA_PARAM_Props:
+		return 0;
+
+	case SPA_PARAM_EnumFormat:
+	case SPA_PARAM_Format:
+		switch (result.index) {
+		case 0:
+			param = spa_format_audio_dsp_build(&b,
+					id, &this->current_format.info.dsp);
+			break;
+		default:
+			return 0;
+		}
+		break;
+
+	case SPA_PARAM_IO:
+		switch (result.index) {
+		case 0:
+			param = spa_pod_builder_add_object(&b,
+				SPA_TYPE_OBJECT_ParamIO, id,
+				SPA_PARAM_IO_id,   SPA_POD_Id(SPA_IO_Clock),
+				SPA_PARAM_IO_size, SPA_POD_Int(sizeof(struct spa_io_clock)));
+			break;
+		case 1:
+			param = spa_pod_builder_add_object(&b,
+				SPA_TYPE_OBJECT_ParamIO, id,
+				SPA_PARAM_IO_id,   SPA_POD_Id(SPA_IO_Position),
+				SPA_PARAM_IO_size, SPA_POD_Int(sizeof(struct spa_io_position)));
+			break;
+		default:
+			return 0;
+		}
+		break;
+
+	default:
+		return -ENOENT;
+	}
+
+	if (spa_pod_filter(&b, &result.param, param, filter) < 0)
+		goto next;
+
+	spa_node_emit_result(&this->hooks, seq, 0, SPA_RESULT_TYPE_NODE_PARAMS, &result);
+
+	if (++count != num)
+		goto next;
+
+	return 0;
+}
+
+static int impl_node_set_io(void *object, uint32_t id, void *data, size_t size)
+{
+	struct impl *this = object;
+
+	spa_return_val_if_fail(this != NULL, -EINVAL);
+
+	switch (id) {
+	case SPA_IO_Clock:
+		this->clock = data;
+		break;
+	case SPA_IO_Position:
+		this->position = data;
+		break;
+	default:
+		return -ENOENT;
+	}
+	return 0;
+}
+
+static int impl_node_set_param(void *object, uint32_t id, uint32_t flags,
+			       const struct spa_pod *param)
+{
+	struct impl *this = object;
+
+	spa_return_val_if_fail(this != NULL, -EINVAL);
+
+	switch (id) {
+	default:
+		return -ENOENT;
+	}
+	return 0;
+}
+
+static int impl_node_send_command(void *object, const struct spa_command *command)
+{
+	struct impl *this = object;
+
+	spa_return_val_if_fail(this != NULL, -EINVAL);
+	spa_return_val_if_fail(command != NULL, -EINVAL);
+
+	switch (SPA_NODE_COMMAND_ID(command)) {
+	case SPA_NODE_COMMAND_Start:
+		if (this->started)
+			return 0;
+
+		this->started = true;
+		break;
+
+	case SPA_NODE_COMMAND_Pause:
+		if (!this->started)
+			return 0;
+
+		this->started = false;
+		break;
+	default:
+		return -ENOTSUP;
+	}
+	return 0;
+}
+
+static void emit_node_info(struct impl *this, bool full)
+{
+	uint64_t old = full ? this->info.change_mask : 0;
+	if (full)
+		this->info.change_mask = this->info_all;
+	if (this->info.change_mask) {
+		struct spa_dict_item items[5];
+		char latency[64];
+		snprintf(latency, sizeof(latency), "%d/%d",
+				this->client->buffer_size, this->client->frame_rate);
+		items[0] = SPA_DICT_ITEM_INIT(SPA_KEY_MEDIA_CLASS, "Audio/Sink");
+		items[1] = SPA_DICT_ITEM_INIT(SPA_KEY_NODE_NAME, "JACK System");
+		items[2] = SPA_DICT_ITEM_INIT(SPA_KEY_NODE_DRIVER, "true");
+		items[3] = SPA_DICT_ITEM_INIT(SPA_KEY_NODE_PAUSE_ON_IDLE, "false");
+		items[4] = SPA_DICT_ITEM_INIT(SPA_KEY_NODE_LATENCY, latency);
+		this->info.props = &SPA_DICT_INIT_ARRAY(items);
+		spa_node_emit_info(&this->hooks, &this->info);
+		this->info.change_mask = old;
+	}
+}
+
+static void emit_port_info(struct impl *this, struct port *port, bool full)
+{
+	uint64_t old = full ? port->info.change_mask : 0;
+	if (full)
+		port->info.change_mask = port->info_all;
+	if (port->info.change_mask) {
+		char* aliases[2];
+		int n_aliases, n_items;
+
+		aliases[0] = alloca(jack_port_name_size());
+		aliases[1] = alloca(jack_port_name_size());
+		n_aliases = jack_port_get_aliases(port->jack_port, aliases);
+		n_items = 1;
+		port->items[n_items++] = SPA_DICT_ITEM_INIT(SPA_KEY_PORT_NAME,
+				jack_port_short_name(port->jack_port));
+		if (n_aliases > 0)
+			port->items[n_items++] = SPA_DICT_ITEM_INIT(SPA_KEY_OBJECT_PATH, aliases[0]);
+		if (n_aliases > 1)
+			port->items[n_items++] = SPA_DICT_ITEM_INIT(SPA_KEY_PORT_ALIAS, aliases[1]);
+		port->props = SPA_DICT_INIT(port->items, n_items);
+
+		spa_node_emit_port_info(&this->hooks,
+				SPA_DIRECTION_INPUT, port->id, &port->info);
+
+		port->info.change_mask = old;
+	}
+}
+
+static int
+impl_node_add_listener(void *object,
+		struct spa_hook *listener,
+		const struct spa_node_events *events,
+		void *data)
+{
+	struct impl *this = object;
+	struct spa_hook_list save;
+	uint32_t i;
+
+	spa_return_val_if_fail(this != NULL, -EINVAL);
+
+	spa_hook_list_isolate(&this->hooks, &save, listener, events, data);
+
+	emit_node_info(this, true);
+	for (i = 0; i < this->n_in_ports; i++)
+		emit_port_info(this, GET_IN_PORT(this, i), true);
+
+	spa_hook_list_join(&this->hooks, &save);
+
+	return 0;
+}
+
+static int
+impl_node_set_callbacks(void *object,
+			const struct spa_node_callbacks *callbacks,
+			void *data)
+{
+	struct impl *this = object;
+
+	spa_return_val_if_fail(this != NULL, -EINVAL);
+
+	this->callbacks = SPA_CALLBACKS_INIT(callbacks, data);
+
+	return 0;
+}
+
+static void client_process(void *data)
+{
+	struct impl *this = data;
+
+	if (this->clock) {
+		struct spa_io_clock *c = this->clock;
+		c->nsec = this->client->current_usecs * SPA_NSEC_PER_USEC;
+		c->rate = SPA_FRACTION(1, this->client->frame_rate);
+		c->position = this->client->current_frames;
+		c->duration = this->client->buffer_size;
+		c->delay = 0;
+		c->rate_diff = 1.0;
+		c->next_nsec = this->client->next_usecs * SPA_NSEC_PER_USEC;
+	}
+	if (this->position) {
+		jack_position_t *jp = &this->client->pos;
+		struct spa_io_position *p = this->position;
+		struct spa_io_segment *s;
+
+		p->n_segments = 1;
+		s = &p->segments[0];
+
+		s->flags = 0;
+		s->position = jp->frame;
+		s->rate = 1.0;
+		if (jp->valid & JackPositionBBT) {
+			s->bar.flags = SPA_IO_SEGMENT_BAR_FLAG_VALID;
+			if (jp->valid & JackBBTFrameOffset)
+				s->bar.offset = jp->bbt_offset;
+			else
+				s->bar.offset = 0;
+			s->bar.signature_num = jp->beats_per_bar;
+			s->bar.signature_denom = jp->beat_type;
+			s->bar.bpm = jp->beats_per_minute;
+			s->bar.beat = jp->bar * jp->beats_per_bar + jp->beat;
+		}
+	}
+	spa_node_call_ready(&this->callbacks, SPA_STATUS_NEED_DATA);
+}
+
+static const struct spa_jack_client_events client_events = {
+	SPA_VERSION_JACK_CLIENT_EVENTS,
+	.process = client_process,
+};
+
+static int init_port(struct impl *this, struct port *port)
+{
+	port->info_all = SPA_PORT_CHANGE_MASK_FLAGS |
+			SPA_PORT_CHANGE_MASK_PROPS |
+			SPA_PORT_CHANGE_MASK_PARAMS;
+	port->info = SPA_PORT_INFO_INIT();
+	port->info.flags = SPA_PORT_FLAG_NO_REF;
+
+	port->items[0] = SPA_DICT_ITEM_INIT(SPA_KEY_FORMAT_DSP, "32 bit float mono audio");
+	port->props = SPA_DICT_INIT(port->items, 1);
+	port->info.props = &port->props;
+
+	port->params[0] = SPA_PARAM_INFO(SPA_PARAM_EnumFormat, SPA_PARAM_INFO_READ);
+	port->params[1] = SPA_PARAM_INFO(SPA_PARAM_Meta, SPA_PARAM_INFO_READ);
+	port->params[2] = SPA_PARAM_INFO(SPA_PARAM_IO, SPA_PARAM_INFO_READ);
+	port->params[3] = SPA_PARAM_INFO(SPA_PARAM_Format, SPA_PARAM_INFO_WRITE);
+	port->params[4] = SPA_PARAM_INFO(SPA_PARAM_Buffers, 0);
+	port->info.params = port->params;
+	port->info.n_params = 5;
+
+	return 0;
+}
+
+static int init_ports(struct impl *this)
+{
+	const char **ports;
+	uint32_t i;
+	jack_client_t *client = this->client->client;
+	int res;
+
+	ports = jack_get_ports(client,
+			NULL, JACK_DEFAULT_AUDIO_TYPE,
+                        JackPortIsPhysical|JackPortIsInput);
+	if (ports == NULL) {
+		spa_log_error(this->log, NAME" %p: can't enumerate ports", this);
+		res = -ENODEV;
+		goto exit;
+	}
+
+	for (i = 0; ports[i]; i++) {
+		struct port *port = GET_IN_PORT(this, i);
+		jack_port_t *p = jack_port_by_name(client, ports[i]);
+		char *aliases[2];
+		int n_aliases;
+
+		port->id = i;
+		port->jack_port = jack_port_register(client,
+				jack_port_short_name(p),
+				jack_port_type(p),
+				JackPortIsOutput, 0);
+		if (port->jack_port == NULL) {
+			spa_log_error(this->log, NAME" %p: jack_port_register() %d (%s) failed",
+					this, i, ports[i]);
+			res = -EFAULT;
+			goto exit_free;
+		}
+
+		aliases[0] = alloca(jack_port_name_size());
+		aliases[1] = alloca(jack_port_name_size());
+
+		n_aliases = jack_port_get_aliases(p, aliases);
+		if (n_aliases > 0)
+			jack_port_set_alias(port->jack_port, aliases[0]);
+		if (n_aliases > 1)
+			jack_port_set_alias(port->jack_port, aliases[1]);
+
+		init_port(this, port);
+	}
+	this->n_in_ports = i;
+
+	this->current_format.info.dsp = SPA_AUDIO_INFO_DSP_INIT(
+			.format = SPA_AUDIO_FORMAT_DSP_F32);
+
+	spa_jack_client_add_listener(this->client,
+			&this->client_listener,
+			&client_events, this);
+
+	jack_activate(client);
+
+	for (i = 0; ports[i]; i++) {
+		struct port *port = GET_IN_PORT(this, i);
+		if (jack_connect(client, jack_port_name(port->jack_port), ports[i])) {
+			spa_log_warn(this->log, NAME" %p: Failed to connect %s to %s",
+					this, jack_port_name(port->jack_port), ports[i]);
+            }
+	}
+
+	res = 0;
+exit_free:
+	jack_free(ports);
+exit:
+	return res;
+}
+
+
+static int impl_node_add_port(void *object, enum spa_direction direction, uint32_t port_id,
+		const struct spa_dict *props)
+{
+	return -ENOTSUP;
+}
+
+static int
+impl_node_remove_port(void *object, enum spa_direction direction, uint32_t port_id)
+{
+	return -ENOTSUP;
+}
+
+static int port_enum_formats(struct impl *this,
+			     enum spa_direction direction, uint32_t port_id,
+			     uint32_t index,
+			     const struct spa_pod *filter,
+			     struct spa_pod **param,
+			     struct spa_pod_builder *builder)
+{
+	switch (index) {
+	case 0:
+		*param = spa_pod_builder_add_object(builder,
+			SPA_TYPE_OBJECT_Format, SPA_PARAM_EnumFormat,
+			SPA_FORMAT_mediaType,       SPA_POD_Id(SPA_MEDIA_TYPE_audio),
+			SPA_FORMAT_mediaSubtype,    SPA_POD_Id(SPA_MEDIA_SUBTYPE_dsp),
+			SPA_FORMAT_AUDIO_format,    SPA_POD_Id(SPA_AUDIO_FORMAT_DSP_F32));
+		break;
+	default:
+		return 0;
+	}
+	return 1;
+}
+
+static int
+impl_node_port_enum_params(void *object, int seq,
+			enum spa_direction direction, uint32_t port_id,
+			uint32_t id, uint32_t start, uint32_t num,
+			const struct spa_pod *filter)
+{
+	struct impl *this = object;
+	struct port *port;
+	struct spa_pod_builder b = { 0 };
+	uint8_t buffer[1024];
+	struct spa_pod *param;
+	struct spa_result_node_params result;
+	uint32_t count = 0;
+	int res;
+
+	spa_return_val_if_fail(this != NULL, -EINVAL);
+	spa_return_val_if_fail(num != 0, -EINVAL);
+
+	spa_return_val_if_fail(CHECK_PORT(this, direction, port_id), -EINVAL);
+
+	port = GET_PORT(this, direction, port_id);
+
+	result.id = id;
+	result.next = start;
+      next:
+	result.index = result.next++;
+
+	spa_pod_builder_init(&b, buffer, sizeof(buffer));
+
+	switch (id) {
+	case SPA_PARAM_EnumFormat:
+		if ((res = port_enum_formats(this, direction, port_id,
+						result.index, filter, &param, &b)) <= 0)
+			return res;
+		break;
+
+	case SPA_PARAM_Format:
+		if (!port->have_format)
+			return -EIO;
+		if (result.index > 0)
+			return 0;
+
+		param = spa_format_audio_dsp_build(&b, id, &port->current_format.info.dsp);
+		break;
+
+	case SPA_PARAM_Buffers:
+	{
+		if (!port->have_format)
+			return -EIO;
+		if (result.index > 0)
+			return 0;
+
+		param = spa_pod_builder_add_object(&b,
+			SPA_TYPE_OBJECT_ParamBuffers, id,
+			SPA_PARAM_BUFFERS_buffers, SPA_POD_CHOICE_RANGE_Int(2, 1, MAX_BUFFERS),
+			SPA_PARAM_BUFFERS_blocks,  SPA_POD_Int(1),
+			SPA_PARAM_BUFFERS_size,    SPA_POD_CHOICE_RANGE_Int(
+							MAX_SAMPLES * port->stride,
+							16 * port->stride,
+							MAX_SAMPLES * port->stride),
+			SPA_PARAM_BUFFERS_stride,  SPA_POD_Int(port->stride));
+		break;
+	}
+	case SPA_PARAM_IO:
+		switch (result.index) {
+		case 0:
+			param = spa_pod_builder_add_object(&b,
+				SPA_TYPE_OBJECT_ParamIO, id,
+				SPA_PARAM_IO_id,   SPA_POD_Id(SPA_IO_Buffers),
+				SPA_PARAM_IO_size, SPA_POD_Int(sizeof(struct spa_io_buffers)));
+			break;
+		default:
+			return 0;
+		}
+		break;
+	default:
+		return -ENOENT;
+	}
+
+	if (spa_pod_filter(&b, &result.param, param, filter) < 0)
+		goto next;
+
+	spa_node_emit_result(&this->hooks, seq, 0, SPA_RESULT_TYPE_NODE_PARAMS, &result);
+
+	if (++count != num)
+		goto next;
+
+	return 0;
+}
+
+static int clear_buffers(struct impl *this, struct port *port)
+{
+	if (port->n_buffers > 0) {
+		spa_log_debug(this->log, NAME " %p: clear buffers", this);
+		port->n_buffers = 0;
+		this->started = false;
+	}
+	return 0;
+}
+
+static int port_set_format(struct impl *this, struct port *port,
+			   uint32_t flags,
+			   const struct spa_pod *format)
+{
+	int res;
+
+	if (format == NULL) {
+		port->have_format = false;
+		clear_buffers(this, port);
+	} else {
+		struct spa_audio_info info = { 0 };
+
+		if ((res = spa_format_parse(format, &info.media_type, &info.media_subtype)) < 0)
+			return res;
+
+		if (info.media_type != SPA_MEDIA_TYPE_audio &&
+		    info.media_subtype != SPA_MEDIA_SUBTYPE_dsp)
+			return -EINVAL;
+
+		if (spa_format_audio_dsp_parse(format, &info.info.dsp) < 0)
+			return -EINVAL;
+
+		if (info.info.dsp.format != SPA_AUDIO_FORMAT_DSP_F32)
+			return -EINVAL;
+
+		port->stride = 4;
+		port->current_format = info;
+		port->have_format = true;
+	}
+
+	port->info.change_mask |= SPA_PORT_CHANGE_MASK_PARAMS;
+	if (port->have_format) {
+		port->params[3] = SPA_PARAM_INFO(SPA_PARAM_Format, SPA_PARAM_INFO_READWRITE);
+		port->params[4] = SPA_PARAM_INFO(SPA_PARAM_Buffers, SPA_PARAM_INFO_READ);
+	} else {
+		port->params[3] = SPA_PARAM_INFO(SPA_PARAM_Format, SPA_PARAM_INFO_WRITE);
+		port->params[4] = SPA_PARAM_INFO(SPA_PARAM_Buffers, 0);
+	}
+	emit_port_info(this, port, false);
+
+	return 0;
+}
+
+static int
+impl_node_port_set_param(void *object,
+			 enum spa_direction direction, uint32_t port_id,
+			 uint32_t id, uint32_t flags,
+			 const struct spa_pod *param)
+{
+	struct impl *this = object;
+	struct port *port;
+	int res;
+
+	spa_return_val_if_fail(this != NULL, -EINVAL);
+	spa_return_val_if_fail(CHECK_PORT(this, direction, port_id), -EINVAL);
+
+	port = GET_PORT(this, direction, port_id);
+
+	switch (id) {
+	case SPA_PARAM_Format:
+		res = port_set_format(this, port, flags, param);
+		break;
+	default:
+		return -ENOENT;
+	}
+	return res;
+}
+
+static int
+impl_node_port_use_buffers(void *object,
+			   enum spa_direction direction,
+			   uint32_t port_id,
+			   uint32_t flags,
+			   struct spa_buffer **buffers,
+			   uint32_t n_buffers)
+{
+	struct impl *this = object;
+	struct port *port;
+	uint32_t i;
+
+	spa_return_val_if_fail(this != NULL, -EINVAL);
+	spa_return_val_if_fail(CHECK_PORT(this, direction, port_id), -EINVAL);
+
+	port = GET_PORT(this, direction, port_id);
+
+	clear_buffers(this, port);
+
+	if (n_buffers > 0 && !port->have_format)
+		return -EIO;
+	if (n_buffers > MAX_BUFFERS)
+		return -ENOSPC;
+
+	for (i = 0; i < n_buffers; i++) {
+		struct buffer *b;
+
+		b = &port->buffers[i];
+		b->id = i;
+		b->outbuf = buffers[i];
+		b->flags = 0;
+	}
+	port->n_buffers = n_buffers;
+
+	return 0;
+}
+
+static int
+impl_node_port_set_io(void *object,
+		      enum spa_direction direction,
+		      uint32_t port_id,
+		      uint32_t id,
+		      void *data, size_t size)
+{
+	struct impl *this = object;
+	struct port *port;
+
+	spa_return_val_if_fail(this != NULL, -EINVAL);
+	spa_return_val_if_fail(CHECK_PORT(this, direction, port_id), -EINVAL);
+
+	port = GET_PORT(this, direction, port_id);
+
+	switch (id) {
+	case SPA_IO_Buffers:
+		port->io = data;
+		break;
+	default:
+		return -ENOENT;
+	}
+	return 0;
+}
+
+static int impl_node_port_reuse_buffer(void *object, uint32_t port_id, uint32_t buffer_id)
+{
+	return -ENOTSUP;
+}
+
+static int impl_node_process(void *object)
+{
+	struct impl *this = object;
+	uint32_t i;
+	int res = 0;
+
+	spa_log_trace(this->log, NAME" %p: process %d", this, this->n_in_ports);
+
+	for (i = 0; i < this->n_in_ports; i++) {
+		struct port *port = GET_IN_PORT(this, i);
+		struct spa_io_buffers *io = port->io;
+		struct buffer *b;
+		struct spa_data *src;
+		uint32_t n_frames = this->client->buffer_size;
+		void *dst;
+
+		dst = jack_port_get_buffer(port->jack_port, n_frames);
+
+		if (io == NULL ||
+		    io->status != SPA_STATUS_HAVE_DATA ||
+		    io->buffer_id >= port->n_buffers) {
+			memset(dst, 0, n_frames * sizeof(float));
+			continue;
+		}
+
+		spa_log_trace(this->log, NAME" %p: port %d: buffer %d", this, i, io->buffer_id);
+		b = &port->buffers[io->buffer_id];
+		src = &b->outbuf->datas[0];
+
+		spa_memcpy(dst, src->data, n_frames * port->stride);
+
+		io->status = SPA_STATUS_NEED_DATA;
+
+		res |= SPA_STATUS_NEED_DATA;
+	}
+	return res;
+}
+
+static const struct spa_node_methods impl_node = {
+	SPA_VERSION_NODE_METHODS,
+	.add_listener = impl_node_add_listener,
+	.set_callbacks = impl_node_set_callbacks,
+	.enum_params = impl_node_enum_params,
+	.set_param = impl_node_set_param,
+	.set_io = impl_node_set_io,
+	.send_command = impl_node_send_command,
+	.add_port = impl_node_add_port,
+	.remove_port = impl_node_remove_port,
+	.port_enum_params = impl_node_port_enum_params,
+	.port_set_param = impl_node_port_set_param,
+	.port_use_buffers = impl_node_port_use_buffers,
+	.port_set_io = impl_node_port_set_io,
+	.port_reuse_buffer = impl_node_port_reuse_buffer,
+	.process = impl_node_process,
+};
+
+static int impl_get_interface(struct spa_handle *handle, const char *type, void **interface)
+{
+	struct impl *this;
+
+	spa_return_val_if_fail(handle != NULL, -EINVAL);
+	spa_return_val_if_fail(interface != NULL, -EINVAL);
+
+	this = (struct impl *) handle;
+
+	if (spa_streq(type, SPA_TYPE_INTERFACE_Node))
+		*interface = &this->node;
+	else
+		return -ENOENT;
+
+	return 0;
+}
+
+static int impl_clear(struct spa_handle *handle)
+{
+	return 0;
+}
+
+static size_t
+impl_get_size(const struct spa_handle_factory *factory,
+	      const struct spa_dict *params)
+{
+	return sizeof(struct impl);
+}
+
+static int
+impl_init(const struct spa_handle_factory *factory,
+	  struct spa_handle *handle,
+	  const struct spa_dict *info,
+	  const struct spa_support *support,
+	  uint32_t n_support)
+{
+	struct impl *this;
+	const char *str;
+
+	spa_return_val_if_fail(factory != NULL, -EINVAL);
+	spa_return_val_if_fail(handle != NULL, -EINVAL);
+
+	handle->get_interface = impl_get_interface;
+	handle->clear = impl_clear;
+
+	this = (struct impl *) handle;
+
+	this->log = spa_support_find(support, n_support, SPA_TYPE_INTERFACE_Log);
+
+	if (info && (str = spa_dict_lookup(info, SPA_KEY_API_JACK_CLIENT)))
+		sscanf(str, "pointer:%p", &this->client);
+
+	if (this->client == NULL) {
+		spa_log_error(this->log, NAME" %p: missing "SPA_KEY_API_JACK_CLIENT
+				" property", this);
+		return -EINVAL;
+	}
+
+	spa_hook_list_init(&this->hooks);
+
+	this->node.iface = SPA_INTERFACE_INIT(
+			SPA_TYPE_INTERFACE_Node,
+			SPA_VERSION_NODE,
+			&impl_node, this);
+
+	this->info_all = SPA_NODE_CHANGE_MASK_FLAGS |
+			SPA_NODE_CHANGE_MASK_PROPS |
+			SPA_NODE_CHANGE_MASK_PARAMS;
+	this->info = SPA_NODE_INFO_INIT();
+	this->info.max_output_ports = MAX_PORTS;
+	this->info.flags = SPA_NODE_FLAG_RT;
+	this->params[0] = SPA_PARAM_INFO(SPA_PARAM_PropInfo, SPA_PARAM_INFO_READ);
+	this->params[1] = SPA_PARAM_INFO(SPA_PARAM_Props, SPA_PARAM_INFO_READWRITE);
+	this->params[2] = SPA_PARAM_INFO(SPA_PARAM_Format, SPA_PARAM_INFO_READ);
+	this->params[3] = SPA_PARAM_INFO(SPA_PARAM_EnumFormat, SPA_PARAM_INFO_READ);
+	this->params[4] = SPA_PARAM_INFO(SPA_PARAM_IO, SPA_PARAM_INFO_READ);
+	this->info.params = this->params;
+	this->info.n_params = 5;
+
+	init_ports(this);
+
+	return 0;
+}
+
+static const struct spa_interface_info impl_interfaces[] = {
+	{SPA_TYPE_INTERFACE_Node,},
+};
+
+static int
+impl_enum_interface_info(const struct spa_handle_factory *factory,
+			 const struct spa_interface_info **info,
+			 uint32_t *index)
+{
+	spa_return_val_if_fail(factory != NULL, -EINVAL);
+	spa_return_val_if_fail(info != NULL, -EINVAL);
+	spa_return_val_if_fail(index != NULL, -EINVAL);
+
+	switch (*index) {
+	case 0:
+		*info = &impl_interfaces[*index];
+		break;
+	default:
+		return 0;
+	}
+	(*index)++;
+	return 1;
+}
+
+static const struct spa_dict_item info_items[] = {
+	{ SPA_KEY_FACTORY_AUTHOR, "Wim Taymans <wim.taymans@gmail.com>" },
+	{ SPA_KEY_FACTORY_DESCRIPTION, "Play audio with the JACK API" },
+};
+
+static const struct spa_dict info = SPA_DICT_INIT_ARRAY(info_items);
+
+const struct spa_handle_factory spa_jack_sink_factory = {
+	SPA_VERSION_HANDLE_FACTORY,
+	SPA_NAME_API_JACK_SINK,
+	&info,
+	impl_get_size,
+	impl_init,
+	impl_enum_interface_info,
+};