Adding upstream version 0.3.65.upstream/0.3.65upstream

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

5 files changed, 2892 insertions, 0 deletions

diff --git a/pipewire-v4l2/src/meson.build b/pipewire-v4l2/src/meson.build
new file mode 100644
index 0000000..a3c97c1
--- /dev/null
+++ b/pipewire-v4l2/src/meson.build
@@ -0,0 +1,41 @@
+pipewire_v4l2_sources = [
+  'pipewire-v4l2.c',
+  'v4l2-func.c',
+]
+
+pipewire_v4l2_c_args = [
+  # Meson enables large file support unconditionally, which redirect file
+  # operations to 64-bit versions. This results in some symbols being
+  # renamed, for instance open() being renamed to open64(). As the V4L2
+  # adaptation wrapper needs to provide both 32-bit and 64-bit versions of
+  # file operations, disable transparent large file support.
+  '-U_FILE_OFFSET_BITS',
+  '-D_FILE_OFFSET_BITS=32',
+  '-D_LARGEFILE64_SOURCE',
+  '-fvisibility=hidden',
+]
+
+libv4l2_path = get_option('libv4l2-path')
+if libv4l2_path == ''
+  libv4l2_path = modules_install_dir / 'v4l2'
+  libv4l2_path_dlopen = modules_install_dir_dlopen / 'v4l2'
+else
+  libv4l2_path_dlopen = libv4l2_path
+endif
+
+tools_config = configuration_data()
+tools_config.set('LIBV4L2_PATH', libv4l2_path_dlopen)
+
+configure_file(input : 'pw-v4l2.in',
+               output : 'pw-v4l2',
+               configuration : tools_config,
+               install_dir : pipewire_bindir)
+
+pipewire_v4l2 = shared_library('pw-v4l2',
+    pipewire_v4l2_sources,
+    c_args : pipewire_v4l2_c_args,
+    include_directories : [configinc],
+    dependencies : [pipewire_dep, mathlib, dl_lib],
+    install : true,
+    install_dir : libv4l2_path,
+)
diff --git a/pipewire-v4l2/src/pipewire-v4l2.c b/pipewire-v4l2/src/pipewire-v4l2.c
new file mode 100644
index 0000000..88702f9
--- /dev/null
+++ b/pipewire-v4l2/src/pipewire-v4l2.c
@@ -0,0 +1,2592 @@
+/* PipeWire
+ *
+ * Copyright © 2021 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 "config.h"
+
+#include <errno.h>
+#include <fcntl.h>
+#include <dlfcn.h>
+#include <stdarg.h>
+#include <stdlib.h>
+#include <sys/mman.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <pthread.h>
+#include <limits.h>
+#include <linux/videodev2.h>
+
+#include "pipewire-v4l2.h"
+
+#include <spa/utils/result.h>
+#include <spa/pod/iter.h>
+#include <spa/pod/parser.h>
+#include <spa/pod/filter.h>
+#include <spa/param/video/format-utils.h>
+
+#include <pipewire/pipewire.h>
+
+PW_LOG_TOPIC_STATIC(v4l2_log_topic, "v4l2");
+#define PW_LOG_TOPIC_DEFAULT v4l2_log_topic
+
+#define MIN_BUFFERS	2u
+#define MAX_BUFFERS	32u
+#define DEFAULT_TIMEOUT	30
+
+#define DEFAULT_DRIVER		"PipeWire"
+#define DEFAULT_CARD		"PipeWire Camera"
+#define DEFAULT_BUS_INFO	"PipeWire"
+
+#define MAX_DEV		32
+struct file_map {
+	void *addr;
+	struct file *file;
+};
+
+struct fd_map {
+	int fd;
+#define FD_MAP_DUP	(1<<0)
+	uint32_t flags;
+	struct file *file;
+};
+
+struct globals {
+	struct fops old_fops;
+
+	pthread_mutex_t lock;
+	struct pw_array fd_maps;
+	struct pw_array file_maps;
+	uint32_t dev_map[MAX_DEV];
+};
+
+static struct globals globals;
+
+struct global;
+
+struct buffer_map {
+	void *addr;
+	uint32_t id;
+};
+
+struct buffer {
+	struct v4l2_buffer v4l2;
+	struct pw_buffer *buf;
+	uint32_t id;
+};
+
+struct file {
+	int ref;
+
+	uint32_t dev_id;
+	uint32_t serial;
+
+	struct pw_properties *props;
+	struct pw_thread_loop *loop;
+	struct pw_loop *l;
+	struct pw_context *context;
+
+	struct pw_core *core;
+	struct spa_hook core_listener;
+
+	int last_seq;
+	int pending_seq;
+	int error;
+
+	struct pw_registry *registry;
+	struct spa_hook registry_listener;
+
+	struct spa_list globals;
+	struct global *node;
+
+	struct pw_stream *stream;
+	struct spa_hook stream_listener;
+
+	enum v4l2_priority priority;
+
+	struct v4l2_format v4l2_format;
+	uint32_t reqbufs;
+
+	int reqbufs_fd;
+	struct buffer buffers[MAX_BUFFERS];
+	uint32_t n_buffers;
+	uint32_t size;
+
+	uint32_t sequence;
+
+	struct pw_array buffer_maps;
+
+	uint32_t last_fourcc;
+
+	unsigned int running:1;
+	unsigned int closed:1;
+	int fd;
+};
+
+struct global_info {
+	const char *type;
+	uint32_t version;
+	const void *events;
+	pw_destroy_t destroy;
+	int (*init) (struct global *g);
+};
+
+struct global {
+	struct spa_list link;
+
+	struct file *file;
+
+	const struct global_info *ginfo;
+
+	uint32_t id;
+	uint32_t permissions;
+	struct pw_properties *props;
+
+	struct pw_proxy *proxy;
+	struct spa_hook proxy_listener;
+	struct spa_hook object_listener;
+
+	int changed;
+	void *info;
+	struct spa_list pending_list;
+	struct spa_list param_list;
+
+	union {
+		struct {
+#define NODE_FLAG_SOURCE	(1<<0)
+#define NODE_FLAG_SINK		(1<<0)
+			uint32_t flags;
+			uint32_t device_id;
+			int priority;
+		} node;
+	};
+};
+
+struct param {
+	struct spa_list link;
+	uint32_t id;
+	int32_t seq;
+	struct spa_pod *param;
+};
+
+static uint32_t clear_params(struct spa_list *param_list, uint32_t id)
+{
+	struct param *p, *t;
+	uint32_t count = 0;
+
+	spa_list_for_each_safe(p, t, param_list, link) {
+		if (id == SPA_ID_INVALID || p->id == id) {
+			spa_list_remove(&p->link);
+			free(p);
+			count++;
+		}
+	}
+	return count;
+}
+
+static struct param *add_param(struct spa_list *params,
+		int seq, uint32_t id, const struct spa_pod *param)
+{
+	struct param *p;
+
+	if (id == SPA_ID_INVALID) {
+		if (param == NULL || !spa_pod_is_object(param)) {
+			errno = EINVAL;
+			return NULL;
+		}
+		id = SPA_POD_OBJECT_ID(param);
+	}
+
+	p = malloc(sizeof(*p) + (param != NULL ? SPA_POD_SIZE(param) : 0));
+	if (p == NULL)
+		return NULL;
+
+	p->id = id;
+	p->seq = seq;
+	if (param != NULL) {
+		p->param = SPA_PTROFF(p, sizeof(*p), struct spa_pod);
+		memcpy(p->param, param, SPA_POD_SIZE(param));
+	} else {
+		clear_params(params, id);
+		p->param = NULL;
+	}
+	spa_list_append(params, &p->link);
+
+	return p;
+}
+
+static void update_params(struct file *file)
+{
+	struct param *p, *t;
+	struct global *node;
+	struct pw_node_info *info;
+	uint32_t i;
+
+	if ((node = file->node) == NULL)
+		return;
+	if ((info = node->info) == NULL)
+		return;
+
+	for (i = 0; i < info->n_params; i++) {
+		spa_list_for_each_safe(p, t, &node->pending_list, link) {
+			if (p->id == info->params[i].id &&
+			    p->seq != info->params[i].seq &&
+			    p->param != NULL) {
+				spa_list_remove(&p->link);
+				free(p);
+			}
+		}
+	}
+
+	spa_list_consume(p, &node->pending_list, link) {
+		spa_list_remove(&p->link);
+		if (p->param == NULL) {
+			clear_params(&node->param_list, p->id);
+			free(p);
+		} else {
+			spa_list_append(&node->param_list, &p->link);
+		}
+	}
+}
+#define ATOMIC_DEC(s)                   __atomic_sub_fetch(&(s), 1, __ATOMIC_SEQ_CST)
+#define ATOMIC_INC(s)                   __atomic_add_fetch(&(s), 1, __ATOMIC_SEQ_CST)
+
+static struct file *make_file(void)
+{
+	struct file *file;
+
+	file = calloc(1, sizeof(*file));
+	if (file == NULL)
+		return NULL;
+
+	file->ref = 1;
+	file->fd = -1;
+	file->reqbufs_fd = -1;
+	file->priority = V4L2_PRIORITY_DEFAULT;
+	spa_list_init(&file->globals);
+	pw_array_init(&file->buffer_maps, sizeof(struct buffer_map) * MAX_BUFFERS);
+	return file;
+}
+
+static void free_file(struct file *file)
+{
+	pw_log_info("file:%d", file->fd);
+
+	if (file->loop)
+		pw_thread_loop_stop(file->loop);
+
+	if (file->registry) {
+		spa_hook_remove(&file->registry_listener);
+		pw_proxy_destroy((struct pw_proxy*)file->registry);
+	}
+	if (file->stream) {
+		spa_hook_remove(&file->stream_listener);
+		pw_stream_destroy(file->stream);
+	}
+	if (file->core) {
+		spa_hook_remove(&file->core_listener);
+		pw_core_disconnect(file->core);
+	}
+	if (file->context)
+		pw_context_destroy(file->context);
+	if (file->fd != -1)
+		spa_system_close(file->l->system, file->fd);
+	if (file->loop)
+		pw_thread_loop_destroy(file->loop);
+
+	pw_array_clear(&file->buffer_maps);
+	free(file);
+}
+
+static void unref_file(struct file *file)
+{
+	pw_log_debug("file:%d ref:%d", file->fd, file->ref);
+	if (ATOMIC_DEC(file->ref) <= 0)
+		free_file(file);
+}
+
+static int add_fd_map(int fd, struct file *file, uint32_t flags)
+{
+	struct fd_map *map;
+	pthread_mutex_lock(&globals.lock);
+	map = pw_array_add(&globals.fd_maps, sizeof(*map));
+	if (map != NULL) {
+		map->fd = fd;
+		map->flags = flags;
+		map->file = file;
+		ATOMIC_INC(file->ref);
+		pw_log_debug("fd:%d -> file:%d ref:%d", fd, file->fd, file->ref);
+	}
+	pthread_mutex_unlock(&globals.lock);
+	return 0;
+}
+
+static uint32_t find_dev_for_serial(uint32_t serial)
+{
+	uint32_t i, res = SPA_ID_INVALID;
+	pthread_mutex_lock(&globals.lock);
+	for (i = 0; i < SPA_N_ELEMENTS(globals.dev_map); i++) {
+		if (globals.dev_map[i] == serial) {
+			res = i;
+			break;
+		}
+	}
+	pthread_mutex_unlock(&globals.lock);
+	return res;
+}
+
+static bool add_dev_for_serial(uint32_t dev, uint32_t serial)
+{
+	pthread_mutex_lock(&globals.lock);
+	globals.dev_map[dev] = serial;
+	pthread_mutex_unlock(&globals.lock);
+	return true;
+}
+
+/* must be called with `globals.lock` held */
+static struct fd_map *find_fd_map_unlocked(int fd)
+{
+	struct fd_map *map;
+	pw_array_for_each(map, &globals.fd_maps) {
+		if (map->fd == fd) {
+			ATOMIC_INC(map->file->ref);
+			pw_log_debug("fd:%d find:%d ref:%d", map->fd, fd, map->file->ref);
+			return map;
+		}
+	}
+	return NULL;
+}
+
+static struct file *find_file(int fd, uint32_t *flags)
+{
+	pthread_mutex_lock(&globals.lock);
+
+	struct fd_map *map = find_fd_map_unlocked(fd);
+	struct file *file = NULL;
+
+	if (map != NULL) {
+		file = map->file;
+		*flags = map->flags;
+	}
+
+	pthread_mutex_unlock(&globals.lock);
+
+	return file;
+}
+
+static struct file *find_file_by_dev(uint32_t dev)
+{
+	struct fd_map *map = NULL, *tmp;
+	struct file *file = NULL;
+
+	pthread_mutex_lock(&globals.lock);
+	pw_array_for_each(tmp, &globals.fd_maps) {
+		if (tmp->file->dev_id == dev) {
+			if (tmp->file->closed)
+				tmp->file->fd = tmp->fd;
+			ATOMIC_INC(tmp->file->ref);
+			map = tmp;
+			pw_log_debug("dev:%d find:%d ref:%d",
+					tmp->file->dev_id, dev, tmp->file->ref);
+			break;
+		}
+	}
+	if (map != NULL)
+		file = map->file;
+	pthread_mutex_unlock(&globals.lock);
+
+	return file;
+}
+
+static struct file *remove_fd_map(int fd)
+{
+	pthread_mutex_lock(&globals.lock);
+
+	struct fd_map *map = find_fd_map_unlocked(fd);
+	struct file *file = NULL;
+
+	if (map != NULL) {
+		file = map->file;
+		pw_log_debug("fd:%d find:%d", map->fd, fd);
+		pw_array_remove(&globals.fd_maps, map);
+	}
+
+	pthread_mutex_unlock(&globals.lock);
+
+	if (file != NULL)
+		unref_file(file);
+
+	return file;
+}
+
+static int add_file_map(struct file *file, void *addr)
+{
+	struct file_map *map;
+	pthread_mutex_lock(&globals.lock);
+	map = pw_array_add(&globals.file_maps, sizeof(*map));
+	if (map != NULL) {
+		map->addr = addr;
+		map->file = file;
+	}
+	pthread_mutex_unlock(&globals.lock);
+	return 0;
+}
+
+/* must be called with `globals.lock` held */
+static struct file_map *find_file_map_unlocked(void *addr)
+{
+	struct file_map *map;
+
+	pw_array_for_each(map, &globals.file_maps) {
+		if (map->addr == addr)
+			return map;
+	}
+
+	return NULL;
+}
+static struct file *remove_file_map(void *addr)
+{
+	pthread_mutex_lock(&globals.lock);
+
+	struct file_map *map = find_file_map_unlocked(addr);
+	struct file *file = NULL;
+
+	if (map != NULL) {
+		file = map->file;
+		pw_array_remove(&globals.file_maps, map);
+	}
+
+	pthread_mutex_unlock(&globals.lock);
+
+	return file;
+}
+
+static int add_buffer_map(struct file *file, void *addr, uint32_t id)
+{
+	struct buffer_map *map;
+	map = pw_array_add(&file->buffer_maps, sizeof(*map));
+	if (map != NULL) {
+		map->addr = addr;
+		map->id = id;
+	}
+	return 0;
+}
+static struct buffer_map *find_buffer_map(struct file *file, void *addr)
+{
+	struct buffer_map *map;
+	pw_array_for_each(map, &file->buffer_maps) {
+		if (map->addr == addr)
+			return map;
+	}
+	return NULL;
+}
+static void remove_buffer_map(struct file *file, struct buffer_map *map)
+{
+	pw_array_remove(&file->buffer_maps, map);
+}
+
+static void do_resync(struct file *file)
+{
+	file->pending_seq = pw_core_sync(file->core, PW_ID_CORE, file->pending_seq);
+}
+
+static int wait_resync(struct file *file)
+{
+	int res;
+	do_resync(file);
+
+	while (true) {
+		pw_thread_loop_wait(file->loop);
+
+		res = file->error;
+		if (res < 0) {
+			file->error = 0;
+			return res;
+		}
+		if (file->pending_seq == file->last_seq)
+			break;
+	}
+	return 0;
+}
+
+static void on_sync_reply(void *data, uint32_t id, int seq)
+{
+	struct file *file = data;
+
+	if (id != PW_ID_CORE)
+		return;
+
+	file->last_seq = seq;
+	if (file->pending_seq == seq) {
+		update_params(file);
+		pw_thread_loop_signal(file->loop, false);
+	}
+}
+
+static void on_error(void *data, uint32_t id, int seq, int res, const char *message)
+{
+	struct file *file = data;
+
+	pw_log_warn("file:%d: error id:%u seq:%d res:%d (%s): %s", file->fd,
+			id, seq, res, spa_strerror(res), message);
+
+	if (id == PW_ID_CORE) {
+		switch (res) {
+		case -ENOENT:
+			break;
+		default:
+			file->error = res;
+		}
+	}
+	pw_thread_loop_signal(file->loop, false);
+}
+
+static const struct pw_core_events core_events = {
+	PW_VERSION_CORE_EVENTS,
+	.done = on_sync_reply,
+	.error = on_error,
+};
+
+/** node */
+static void node_event_info(void *object, const struct pw_node_info *info)
+{
+	struct global *g = object;
+	struct file *file = g->file;
+	const char *str;
+	uint32_t i;
+
+	info = g->info = pw_node_info_merge(g->info, info, g->changed == 0);
+	if (info == NULL)
+		return;
+
+	pw_log_debug("update %d %"PRIu64, g->id, info->change_mask);
+
+	if (info->change_mask & PW_NODE_CHANGE_MASK_PROPS && info->props) {
+		if ((str = spa_dict_lookup(info->props, PW_KEY_DEVICE_ID)))
+			g->node.device_id = atoi(str);
+		else
+			g->node.device_id = SPA_ID_INVALID;
+
+		if ((str = spa_dict_lookup(info->props, PW_KEY_PRIORITY_SESSION)))
+			g->node.priority = atoi(str);
+		if ((str = spa_dict_lookup(info->props, PW_KEY_MEDIA_CLASS))) {
+			if (spa_streq(str, "Video/Sink"))
+				g->node.flags |= NODE_FLAG_SINK;
+			else if (spa_streq(str, "Video/Source"))
+				g->node.flags |= NODE_FLAG_SOURCE;
+		}
+	}
+	if (info->change_mask & PW_NODE_CHANGE_MASK_PARAMS) {
+		for (i = 0; i < info->n_params; i++) {
+			uint32_t id = info->params[i].id;
+			int res;
+
+			if (info->params[i].user == 0)
+				continue;
+			info->params[i].user = 0;
+
+			add_param(&g->pending_list, info->params[i].seq, id, NULL);
+			if (!(info->params[i].flags & SPA_PARAM_INFO_READ))
+				continue;
+
+			res = pw_node_enum_params((struct pw_node*)g->proxy,
+					++info->params[i].seq, id, 0, -1, NULL);
+			if (SPA_RESULT_IS_ASYNC(res))
+				info->params[i].seq = res;
+		}
+	}
+	do_resync(file);
+}
+
+static void node_event_param(void *object, int seq,
+                uint32_t id, uint32_t index, uint32_t next,
+                const struct spa_pod *param)
+{
+	struct global *g = object;
+
+	pw_log_debug("update param %d %d %d", g->id, id, seq);
+	add_param(&g->pending_list, seq, id, param);
+}
+
+static const struct pw_node_events node_events = {
+	PW_VERSION_NODE_EVENTS,
+	.info = node_event_info,
+	.param = node_event_param,
+};
+
+static const struct global_info node_info = {
+	.type = PW_TYPE_INTERFACE_Node,
+	.version = PW_VERSION_NODE,
+	.events = &node_events,
+};
+
+/** proxy */
+static void proxy_removed(void *data)
+{
+	struct global *g = data;
+	pw_proxy_destroy(g->proxy);
+}
+
+static void proxy_destroy(void *data)
+{
+	struct global *g = data;
+	spa_list_remove(&g->link);
+	g->proxy = NULL;
+	if (g->file)
+		g->file->node = NULL;
+	clear_params(&g->param_list, SPA_ID_INVALID);
+	clear_params(&g->pending_list, SPA_ID_INVALID);
+}
+
+static const struct pw_proxy_events proxy_events = {
+	PW_VERSION_PROXY_EVENTS,
+	.removed = proxy_removed,
+	.destroy = proxy_destroy
+};
+
+static void registry_event_global(void *data, uint32_t id,
+		uint32_t permissions, const char *type, uint32_t version,
+		const struct spa_dict *props)
+{
+	struct file *file = data;
+	const struct global_info *info = NULL;
+	struct pw_proxy *proxy;
+	const char *str;
+	uint32_t serial = SPA_ID_INVALID, dev, req_serial;
+
+	if (spa_streq(type, PW_TYPE_INTERFACE_Node)) {
+
+		if (file->node != NULL)
+			return;
+
+		pw_log_info("got %d %s", id, type);
+
+		if (props == NULL)
+			return;
+		if (((str = spa_dict_lookup(props, PW_KEY_MEDIA_CLASS)) == NULL) ||
+		    ((!spa_streq(str, "Video/Sink")) &&
+		     (!spa_streq(str, "Video/Source"))))
+			return;
+
+		if (((str = spa_dict_lookup(props, PW_KEY_OBJECT_SERIAL)) == NULL) ||
+		    !spa_atou32(str, &serial, 10))
+			return;
+
+		if ((str = getenv("PIPEWIRE_V4L2_TARGET")) != NULL
+				&& spa_atou32(str, &req_serial, 10)
+				&& req_serial != serial)
+			return;
+
+		dev = find_dev_for_serial(serial);
+		if (dev != SPA_ID_INVALID && dev != file->dev_id)
+			return;
+
+		pw_log_info("found node:%d serial:%d type:%s", id, serial, str);
+		info = &node_info;
+	}
+	if (info) {
+		struct global *g;
+
+		proxy = pw_registry_bind(file->registry,
+				id, info->type, info->version,
+				sizeof(struct global));
+
+		g = pw_proxy_get_user_data(proxy);
+		g->file = file;
+		g->ginfo = info;
+		g->id = id;
+		g->permissions = permissions;
+		g->props = props ? pw_properties_new_dict(props) : NULL;
+		g->proxy = proxy;
+		spa_list_init(&g->pending_list);
+		spa_list_init(&g->param_list);
+		spa_list_append(&file->globals, &g->link);
+
+		pw_proxy_add_listener(proxy,
+				&g->proxy_listener,
+				&proxy_events, g);
+
+		if (info->events) {
+			pw_proxy_add_object_listener(proxy,
+					&g->object_listener,
+					info->events, g);
+		}
+		if (info->init)
+			info->init(g);
+
+		file->serial = serial;
+		file->node = g;
+
+		do_resync(file);
+	}
+}
+
+static struct global *find_global(struct file *file, uint32_t id)
+{
+	struct global *g;
+	spa_list_for_each(g, &file->globals, link) {
+		if (g->id == id)
+			return g;
+	}
+	return NULL;
+}
+
+static void registry_event_global_remove(void *data, uint32_t id)
+{
+	struct file *file = data;
+	struct global *g;
+
+	if ((g = find_global(file, id)) == NULL)
+		return;
+
+	pw_proxy_destroy(g->proxy);
+}
+
+static const struct pw_registry_events registry_events = {
+	PW_VERSION_REGISTRY_EVENTS,
+	.global = registry_event_global,
+	.global_remove = registry_event_global_remove,
+};
+
+static int do_dup(int oldfd, uint32_t flags)
+{
+	int res;
+	struct file *file;
+	uint32_t fl;
+
+	res = globals.old_fops.dup(oldfd);
+	if (res < 0)
+		return res;
+
+	if ((file = find_file(oldfd, &fl)) != NULL) {
+		add_fd_map(res, file, flags | fl);
+		unref_file(file);
+		pw_log_info("fd:%d %08x -> %d (%s)", oldfd, flags,
+				res, strerror(res < 0 ? errno : 0));
+	}
+	return res;
+}
+
+static int v4l2_dup(int oldfd)
+{
+	return do_dup(oldfd, FD_MAP_DUP);
+}
+
+static int v4l2_openat(int dirfd, const char *path, int oflag, mode_t mode)
+{
+	int res, flags;
+	struct file *file;
+	bool passthrough = true;
+	uint32_t dev_id = SPA_ID_INVALID;
+	char *real_path;
+
+	real_path = realpath(path, NULL);
+	if (!real_path)
+		real_path = (char *)path;
+
+	if (spa_strstartswith(real_path, "/dev/video")) {
+		if (spa_atou32(real_path+10, &dev_id, 10) && dev_id < MAX_DEV)
+			passthrough = false;
+	}
+
+	if (real_path && real_path != path)
+		free(real_path);
+
+	if (passthrough)
+		return globals.old_fops.openat(dirfd, path, oflag, mode);
+
+	pw_log_info("path:%s oflag:%d mode:%d", path, oflag, mode);
+
+	if ((file = find_file_by_dev(dev_id)) != NULL) {
+		res = do_dup(file->fd, 0);
+		unref_file(file);
+		if (res >= 0)
+			fcntl(res, F_SETFL, oflag);
+		return res;
+	}
+
+	if ((file = make_file()) == NULL)
+		goto error;
+
+	file->dev_id = dev_id;
+	file->props = pw_properties_new(
+			PW_KEY_CLIENT_API, "v4l2",
+			NULL);
+	file->loop = pw_thread_loop_new("v4l2", NULL);
+	if (file->loop == NULL)
+		goto error;
+
+	file->l = pw_thread_loop_get_loop(file->loop);
+	file->context = pw_context_new(file->l,
+			pw_properties_copy(file->props), 0);
+	if (file->context == NULL)
+		goto error;
+
+	pw_thread_loop_start(file->loop);
+
+	pw_thread_loop_lock(file->loop);
+
+	file->core = pw_context_connect(file->context,
+			pw_properties_copy(file->props), 0);
+	if (file->core == NULL)
+		goto error_unlock;
+
+	pw_core_add_listener(file->core,
+			&file->core_listener,
+			&core_events, file);
+	file->registry = pw_core_get_registry(file->core,
+			PW_VERSION_REGISTRY, 0);
+	if (file->registry == NULL)
+		goto error_unlock;
+
+	pw_registry_add_listener(file->registry,
+			&file->registry_listener,
+			&registry_events, file);
+
+	res = wait_resync(file);
+	if (res < 0) {
+		errno = -res;
+		goto error_unlock;
+	}
+	if (file->node == NULL) {
+		errno = ENOENT;
+		goto error_unlock;
+	}
+	pw_thread_loop_unlock(file->loop);
+
+	flags = SPA_FD_CLOEXEC;
+	if (oflag & O_NONBLOCK)
+		flags |= SPA_FD_NONBLOCK;
+
+	res = spa_system_eventfd_create(file->l->system, flags);
+	if (res < 0)
+		goto error;
+
+	file->fd = res;
+
+	pw_log_info("path:%s oflag:%d mode:%d -> %d (%s)", path, oflag, mode,
+			res, strerror(res < 0 ? errno : 0));
+
+	add_fd_map(res, file, 0);
+	add_dev_for_serial(file->dev_id, file->serial);
+	unref_file(file);
+
+	return res;
+
+error_unlock:
+	pw_thread_loop_unlock(file->loop);
+error:
+	res = -errno;
+	if (file)
+		free_file(file);
+
+	pw_log_info("path:%s oflag:%d mode:%d -> %d (%s)", path, oflag, mode,
+			-1, spa_strerror(res));
+
+	errno = -res;
+
+	return -1;
+}
+
+static int v4l2_close(int fd)
+{
+	struct file *file;
+
+	if ((file = remove_fd_map(fd)) == NULL)
+		return globals.old_fops.close(fd);
+
+	pw_log_info("fd:%d file:%d", fd, file->fd);
+
+	if (fd != file->fd)
+		spa_system_close(file->l->system, fd);
+
+	file->closed = true;
+	unref_file(file);
+
+	return 0;
+}
+
+#define KERNEL_VERSION(a, b, c) (((a) << 16) + ((b) << 8) + (c))
+
+static int vidioc_querycap(struct file *file, struct v4l2_capability *arg)
+{
+	int res = 0;
+	const char *str = NULL;
+	struct pw_node_info *info;
+
+	if (file->node == NULL)
+		return -EIO;
+
+	info = file->node->info;
+
+	if (info != NULL && info->props != NULL) {
+		str = spa_dict_lookup(info->props, PW_KEY_NODE_DESCRIPTION);
+	}
+	if (str == NULL)
+		str = DEFAULT_CARD;
+
+	spa_scnprintf((char*)arg->driver, sizeof(arg->driver), "%s", DEFAULT_DRIVER);
+	spa_scnprintf((char*)arg->card, sizeof(arg->card), "%s", str);
+	spa_scnprintf((char*)arg->bus_info, sizeof(arg->bus_info), "platform:%s-%d",
+			DEFAULT_BUS_INFO, file->node->id);
+
+	arg->version = KERNEL_VERSION(5, 2, 0);
+	arg->device_caps = V4L2_CAP_VIDEO_CAPTURE
+		| V4L2_CAP_STREAMING
+		| V4L2_CAP_EXT_PIX_FORMAT;
+	arg->capabilities = arg->device_caps | V4L2_CAP_DEVICE_CAPS;
+	memset(arg->reserved, 0, sizeof(arg->reserved));
+
+	pw_log_info("file:%d -> %d (%s)", file->fd, res, spa_strerror(res));
+	return res;
+}
+
+struct format_info {
+	uint32_t fourcc;
+	uint32_t media_type;
+	uint32_t media_subtype;
+	uint32_t format;
+	uint32_t bpp;
+	const char *desc;
+};
+
+#define MAKE_FORMAT(fcc,mt,mst,bpp,fmt,...)	\
+	{ V4L2_PIX_FMT_ ## fcc, SPA_MEDIA_TYPE_ ## mt, SPA_MEDIA_SUBTYPE_ ## mst, SPA_VIDEO_FORMAT_ ## fmt, bpp, __VA_ARGS__ }
+
+static const struct format_info format_info[] = {
+	/* RGB formats */
+	MAKE_FORMAT(RGB332, video, raw, 4, UNKNOWN, "8-bit RGB 3-3-2"),
+	MAKE_FORMAT(ARGB555, video, raw, 4, UNKNOWN),
+	MAKE_FORMAT(XRGB555, video, raw, 4, RGB15, "16-bit XRGB 1-5-5-5"),
+	MAKE_FORMAT(ARGB555X, video, raw, 4, UNKNOWN),
+	MAKE_FORMAT(XRGB555X, video, raw, 4, BGR15, "16-bit XRGB 1-5-5-5 BE"),
+	MAKE_FORMAT(RGB565, video, raw, 4, RGB16, "16-bit RGB 5-6-5"),
+	MAKE_FORMAT(RGB565X, video, raw, 4, UNKNOWN),
+	MAKE_FORMAT(BGR666, video, raw, 4, UNKNOWN),
+	MAKE_FORMAT(BGR24, video, raw, 4, BGR),
+	MAKE_FORMAT(RGB24, video, raw, 4, RGB),
+	MAKE_FORMAT(ABGR32, video, raw, 4, BGRA),
+	MAKE_FORMAT(XBGR32, video, raw, 4, BGRx),
+	MAKE_FORMAT(ARGB32, video, raw, 4, ARGB),
+	MAKE_FORMAT(XRGB32, video, raw, 4, xRGB),
+
+	/* Deprecated Packed RGB Image Formats (alpha ambiguity) */
+	MAKE_FORMAT(RGB444, video, raw, 2, UNKNOWN),
+	MAKE_FORMAT(RGB555, video, raw, 2, RGB15),
+	MAKE_FORMAT(RGB555X, video, raw, 2, BGR15),
+	MAKE_FORMAT(BGR32, video, raw, 4, BGRx),
+	MAKE_FORMAT(RGB32, video, raw, 4, xRGB),
+
+        /* Grey formats */
+	MAKE_FORMAT(GREY, video, raw, 1, GRAY8),
+	MAKE_FORMAT(Y4, video, raw, 1, UNKNOWN),
+	MAKE_FORMAT(Y6, video, raw, 1, UNKNOWN),
+	MAKE_FORMAT(Y10, video, raw, 2, UNKNOWN),
+	MAKE_FORMAT(Y12, video, raw, 2, UNKNOWN),
+	MAKE_FORMAT(Y16, video, raw, 2, GRAY16_LE),
+	MAKE_FORMAT(Y16_BE, video, raw, 2, GRAY16_BE),
+	MAKE_FORMAT(Y10BPACK, video, raw, 2, UNKNOWN),
+
+	/* Palette formats */
+	MAKE_FORMAT(PAL8, video, raw, 1, UNKNOWN),
+
+	/* Chrominance formats */
+	MAKE_FORMAT(UV8, video, raw, 2, UNKNOWN),
+
+	/* Luminance+Chrominance formats */
+	MAKE_FORMAT(YVU410, video, raw, 1, YVU9, "Planar YVU 4:1:0"),
+	MAKE_FORMAT(YVU420, video, raw, 1, YV12, "Planar YVU 4:2:0"),
+	MAKE_FORMAT(YVU420M, video, raw, 1, UNKNOWN),
+	MAKE_FORMAT(YUYV, video, raw, 2, YUY2, "YUYV 4:2:2"),
+	MAKE_FORMAT(YYUV, video, raw, 2, UNKNOWN),
+	MAKE_FORMAT(YVYU, video, raw, 2, YVYU, "YVYU 4:2:2"),
+	MAKE_FORMAT(UYVY, video, raw, 2, UYVY, "UYVY 4:2:2"),
+	MAKE_FORMAT(VYUY, video, raw, 2, UNKNOWN),
+	MAKE_FORMAT(YUV422P, video, raw, 1, Y42B),
+	MAKE_FORMAT(YUV411P, video, raw, 1, Y41B),
+	MAKE_FORMAT(Y41P, video, raw, 1, UNKNOWN),
+	MAKE_FORMAT(YUV444, video, raw, 1, UNKNOWN),
+	MAKE_FORMAT(YUV555, video, raw, 1, UNKNOWN),
+	MAKE_FORMAT(YUV565, video, raw, 1, UNKNOWN),
+	MAKE_FORMAT(YUV32, video, raw, 1, UNKNOWN),
+	MAKE_FORMAT(YUV410, video, raw, 1, YUV9),
+	MAKE_FORMAT(YUV420, video, raw, 1, I420, "Planar YUV 4:2:0"),
+	MAKE_FORMAT(YUV420M, video, raw, 1, I420, "Planar YUV 4:2:0 (N-C)"),
+	MAKE_FORMAT(HI240, video, raw, 1, UNKNOWN),
+	MAKE_FORMAT(HM12, video, raw, 1, UNKNOWN),
+	MAKE_FORMAT(M420, video, raw, 1, UNKNOWN),
+
+	/* two planes -- one Y, one Cr + Cb interleaved  */
+	MAKE_FORMAT(NV12, video, raw, 1, NV12, "Y/CbCr 4:2:0"),
+	MAKE_FORMAT(NV12M, video, raw, 1,  NV12, "Y/CbCr 4:2:0 (N-C)"),
+	MAKE_FORMAT(NV12MT, video, raw, 1,  NV12_64Z32, "Y/CbCr 4:2:0 (64x32 MB, N-C)"),
+	MAKE_FORMAT(NV12MT_16X16, video, raw, 1, UNKNOWN),
+	MAKE_FORMAT(NV21, video, raw, 1, NV21, "Y/CrCb 4:2:0"),
+	MAKE_FORMAT(NV21M, video, raw, 1, NV21, "Y/CrCb 4:2:0 (N-C)"),
+	MAKE_FORMAT(NV16, video, raw, 1, NV16, "Y/CbCr 4:2:2"),
+	MAKE_FORMAT(NV16M, video, raw, 1, NV16, "Y/CbCr 4:2:2 (N-C)"),
+	MAKE_FORMAT(NV61, video, raw, 1, NV61, "Y/CrCb 4:2:2"),
+	MAKE_FORMAT(NV61M, video, raw, 1, NV61, "Y/CrCb 4:2:2 (N-C)"),
+	MAKE_FORMAT(NV24, video, raw, 1, NV24, "Y/CbCr 4:4:4"),
+	MAKE_FORMAT(NV42, video, raw, 1, UNKNOWN),
+
+	/* Bayer formats - see http://www.siliconimaging.com/RGB%20Bayer.htm */
+	MAKE_FORMAT(SBGGR8, video, bayer, 1, UNKNOWN),
+	MAKE_FORMAT(SGBRG8, video, bayer, 1, UNKNOWN),
+	MAKE_FORMAT(SGRBG8, video, bayer, 1, UNKNOWN),
+	MAKE_FORMAT(SRGGB8, video, bayer, 1, UNKNOWN),
+
+	/* compressed formats */
+	MAKE_FORMAT(MJPEG, video, mjpg, 1, ENCODED, "Motion-JPEG"),
+	MAKE_FORMAT(JPEG, video, mjpg, 1, ENCODED, "JFIF JPEG"),
+	MAKE_FORMAT(PJPG, video, mjpg, 1, ENCODED, "GSPCA PJPG"),
+	MAKE_FORMAT(DV, video, dv, 1, ENCODED),
+	MAKE_FORMAT(MPEG, video, mpegts, 1, ENCODED),
+	MAKE_FORMAT(H264, video, h264, 1, ENCODED, "H.264"),
+	MAKE_FORMAT(H264_NO_SC, video, h264, 1, ENCODED, "H.264 (No Start Codes)"),
+	MAKE_FORMAT(H264_MVC, video, h264, 1, ENCODED, "H.264 MVC"),
+	MAKE_FORMAT(H263, video, h263, 1, ENCODED),
+	MAKE_FORMAT(MPEG1, video, mpeg1, 1, ENCODED),
+	MAKE_FORMAT(MPEG2, video, mpeg2, 1, ENCODED),
+	MAKE_FORMAT(MPEG4, video, mpeg4, 1, ENCODED),
+	MAKE_FORMAT(XVID, video, xvid, 1, ENCODED),
+	MAKE_FORMAT(VC1_ANNEX_G, video, vc1, 1, ENCODED),
+	MAKE_FORMAT(VC1_ANNEX_L, video, vc1, 1, ENCODED),
+	MAKE_FORMAT(VP8, video, vp8, 1, ENCODED),
+
+	/*  Vendor-specific formats   */
+	MAKE_FORMAT(WNVA, video, raw, 1, UNKNOWN),
+	MAKE_FORMAT(SN9C10X, video, raw, 1, UNKNOWN),
+	MAKE_FORMAT(PWC1, video, raw, 1, UNKNOWN),
+	MAKE_FORMAT(PWC2, video, raw, 1, UNKNOWN),
+};
+
+static const struct format_info *format_info_from_media_type(uint32_t type,
+		uint32_t subtype, uint32_t format)
+{
+	SPA_FOR_EACH_ELEMENT_VAR(format_info, i)
+		if ((i->media_type == type) &&
+		    (i->media_subtype == subtype) &&
+		    (format == 0 || i->format == format))
+			return i;
+	return NULL;
+}
+
+static const struct format_info *format_info_from_fourcc(uint32_t fourcc)
+{
+	SPA_FOR_EACH_ELEMENT_VAR(format_info, i)
+		if (i->fourcc == fourcc)
+			return i;
+	return NULL;
+}
+
+static int format_to_info(const struct v4l2_format *arg, struct spa_video_info *info)
+{
+	const struct format_info *fi;
+
+	pw_log_info("type: %u", arg->type);
+	pw_log_info("width: %u", arg->fmt.pix.width);
+	pw_log_info("height: %u", arg->fmt.pix.height);
+	pw_log_info("fmt: %.4s", (char*)&arg->fmt.pix.pixelformat);
+
+	if (arg->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
+		return -EINVAL;
+
+	fi = format_info_from_fourcc(arg->fmt.pix.pixelformat);
+	if (fi == NULL)
+		return -EINVAL;
+
+	spa_zero(*info);
+	info->media_type = fi->media_type;
+	info->media_subtype = fi->media_subtype;
+
+	switch (info->media_subtype) {
+	case SPA_MEDIA_SUBTYPE_raw:
+		info->info.raw.format = fi->format;
+		info->info.raw.size.width = arg->fmt.pix.width;
+		info->info.raw.size.height = arg->fmt.pix.height;
+		break;
+	case SPA_MEDIA_SUBTYPE_h264:
+		info->info.h264.size.width = arg->fmt.pix.width;
+		info->info.h264.size.height = arg->fmt.pix.height;
+		break;
+	case SPA_MEDIA_SUBTYPE_mjpg:
+	case SPA_MEDIA_SUBTYPE_jpeg:
+		info->info.mjpg.size.width = arg->fmt.pix.width;
+		info->info.mjpg.size.height = arg->fmt.pix.height;
+		break;
+	default:
+		return -EINVAL;
+	}
+	return 0;
+}
+
+static struct spa_pod *info_to_param(struct spa_pod_builder *builder, uint32_t id,
+		struct spa_video_info *info)
+{
+	struct spa_pod *pod;
+
+	if (info->media_type != SPA_MEDIA_TYPE_video)
+		return NULL;
+
+	switch (info->media_subtype) {
+	case SPA_MEDIA_SUBTYPE_raw:
+		pod = spa_format_video_raw_build(builder, id, &info->info.raw);
+		break;
+	case SPA_MEDIA_SUBTYPE_mjpg:
+	case SPA_MEDIA_SUBTYPE_jpeg:
+		pod = spa_format_video_mjpg_build(builder, id, &info->info.mjpg);
+		break;
+	case SPA_MEDIA_SUBTYPE_h264:
+		pod = spa_format_video_h264_build(builder, id, &info->info.h264);
+		break;
+	default:
+		return NULL;
+	}
+	return pod;
+}
+
+static struct spa_pod *fmt_to_param(struct spa_pod_builder *builder, uint32_t id,
+		const struct v4l2_format *fmt)
+{
+	struct spa_video_info info;
+	if (format_to_info(fmt, &info) < 0)
+		return NULL;
+	return info_to_param(builder, id, &info);
+}
+
+static int param_to_info(const struct spa_pod *param, struct spa_video_info *info)
+{
+	int res;
+
+	spa_zero(*info);
+	if (spa_format_parse(param, &info->media_type, &info->media_subtype) < 0)
+		return -EINVAL;
+
+	if (info->media_type != SPA_MEDIA_TYPE_video)
+		return -EINVAL;
+
+	switch (info->media_subtype) {
+	case SPA_MEDIA_SUBTYPE_raw:
+		res = spa_format_video_raw_parse(param, &info->info.raw);
+		break;
+	case SPA_MEDIA_SUBTYPE_h264:
+		res = spa_format_video_h264_parse(param, &info->info.h264);
+		break;
+	case SPA_MEDIA_SUBTYPE_mjpg:
+	case SPA_MEDIA_SUBTYPE_jpeg:
+		res = spa_format_video_mjpg_parse(param, &info->info.mjpg);
+		break;
+	default:
+		return -EINVAL;
+	}
+	return res;
+}
+
+static int info_to_fmt(const struct spa_video_info *info, struct v4l2_format *fmt)
+{
+	const struct format_info *fi;
+	uint32_t format;
+
+	if (info->media_type != SPA_MEDIA_TYPE_video)
+		return -EINVAL;
+
+	if (info->media_subtype == SPA_MEDIA_SUBTYPE_raw) {
+		format = info->info.raw.format;
+	} else {
+		format = SPA_VIDEO_FORMAT_ENCODED;
+	}
+
+	fi = format_info_from_media_type(info->media_type, info->media_subtype,
+			format);
+	if (fi == NULL)
+		return -EINVAL;
+
+	spa_zero(*fmt);
+	fmt->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+	fmt->fmt.pix.pixelformat = fi->fourcc;
+	fmt->fmt.pix.field = V4L2_FIELD_NONE;
+
+	switch (info->media_subtype) {
+	case SPA_MEDIA_SUBTYPE_raw:
+		fmt->fmt.pix.width = info->info.raw.size.width;
+		fmt->fmt.pix.height = info->info.raw.size.height;
+		fmt->fmt.pix.colorspace = V4L2_COLORSPACE_SRGB;
+		break;
+	case SPA_MEDIA_SUBTYPE_mjpg:
+	case SPA_MEDIA_SUBTYPE_jpeg:
+		fmt->fmt.pix.width = info->info.mjpg.size.width;
+		fmt->fmt.pix.height = info->info.mjpg.size.height;
+		fmt->fmt.pix.colorspace = V4L2_COLORSPACE_JPEG;
+		break;
+	case SPA_MEDIA_SUBTYPE_h264:
+		fmt->fmt.pix.width = info->info.h264.size.width;
+		fmt->fmt.pix.height = info->info.h264.size.height;
+		fmt->fmt.pix.colorspace = V4L2_COLORSPACE_SRGB;
+		break;
+	default:
+		return -EINVAL;
+	}
+	if (fmt->fmt.pix.width == 0 ||
+	    fmt->fmt.pix.height == 0)
+		return -EINVAL;
+
+	fmt->fmt.pix.bytesperline = SPA_ROUND_UP_N(fmt->fmt.pix.width, 4) * fi->bpp;
+	fmt->fmt.pix.sizeimage = fmt->fmt.pix.bytesperline *
+		SPA_ROUND_UP_N(fmt->fmt.pix.height, 2);
+
+	return 0;
+}
+
+static int param_to_fmt(const struct spa_pod *param, struct v4l2_format *fmt)
+{
+	struct spa_video_info info;
+	struct spa_pod *copy;
+	int res;
+
+	copy = spa_pod_copy(param);
+	spa_pod_fixate(copy);
+	res = param_to_info(copy, &info);
+	free(copy);
+
+	if (res < 0)
+		return -EINVAL;
+	if (info_to_fmt(&info, fmt) < 0)
+		return -EINVAL;
+	return 0;
+}
+
+static void on_stream_param_changed(void *data, uint32_t id, const struct spa_pod *param)
+{
+	struct file *file = data;
+	const struct spa_pod *params[4];
+	uint32_t n_params = 0;
+	uint8_t buffer[4096];
+	struct spa_pod_builder b = SPA_POD_BUILDER_INIT(buffer, sizeof(buffer));
+	uint32_t buffers, size, stride;
+	struct v4l2_format fmt;
+
+	if (param == NULL || id != SPA_PARAM_Format)
+		return;
+
+	if (param_to_fmt(param, &fmt) < 0)
+		return;
+
+	file->v4l2_format = fmt;
+
+	buffers = SPA_CLAMP(file->reqbufs, 1u, MAX_BUFFERS);
+	size = fmt.fmt.pix.sizeimage;
+	stride = fmt.fmt.pix.bytesperline;
+
+	params[n_params++] = spa_pod_builder_add_object(&b,
+			SPA_TYPE_OBJECT_ParamBuffers, SPA_PARAM_Buffers,
+			SPA_PARAM_BUFFERS_buffers, SPA_POD_CHOICE_RANGE_Int(buffers,
+							1, MAX_BUFFERS),
+			SPA_PARAM_BUFFERS_blocks,  SPA_POD_Int(1),
+			SPA_PARAM_BUFFERS_size,    SPA_POD_CHOICE_RANGE_Int(size, 0, INT_MAX),
+			SPA_PARAM_BUFFERS_stride,  SPA_POD_CHOICE_RANGE_Int(stride, 0, INT_MAX),
+			SPA_PARAM_BUFFERS_dataType, SPA_POD_CHOICE_FLAGS_Int((1<<SPA_DATA_MemFd)));
+
+
+	pw_stream_update_params(file->stream, params, n_params);
+
+}
+
+static void on_stream_state_changed(void *data, enum pw_stream_state old,
+		enum pw_stream_state state, const char *error)
+{
+	struct file *file = data;
+
+	pw_log_info("file:%d: state %s", file->fd, pw_stream_state_as_string(state));
+
+	switch (state) {
+	case PW_STREAM_STATE_ERROR:
+		break;
+	case PW_STREAM_STATE_UNCONNECTED:
+		break;
+	case PW_STREAM_STATE_CONNECTING:
+	case PW_STREAM_STATE_PAUSED:
+	case PW_STREAM_STATE_STREAMING:
+		break;
+	}
+	pw_thread_loop_signal(file->loop, false);
+}
+
+static void on_stream_add_buffer(void *data, struct pw_buffer *b)
+{
+	struct file *file = data;
+	uint32_t id = file->n_buffers;
+	struct buffer *buf = &file->buffers[id];
+	struct v4l2_buffer vb;
+	struct spa_data *d = &b->buffer->datas[0];
+
+	file->size = d->maxsize;
+
+	pw_log_info("file:%d: id:%d fd:%"PRIi64" size:%u offset:%u", file->fd,
+			id, d->fd, file->size, id * file->size);
+
+	spa_zero(vb);
+	vb.index = id;
+	vb.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+	vb.flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
+	vb.memory = V4L2_MEMORY_MMAP;
+	vb.m.offset = id * file->size;
+	vb.length = file->size;
+
+	buf->v4l2 = vb;
+	buf->id = id;
+	buf->buf = b;
+	b->user_data = buf;
+
+	file->n_buffers++;
+}
+
+static void on_stream_remove_buffer(void *data, struct pw_buffer *b)
+{
+	struct file *file = data;
+	file->n_buffers--;
+}
+
+static void on_stream_process(void *data)
+{
+	struct file *file = data;
+	pw_log_debug("file:%d", file->fd);
+	spa_system_eventfd_write(file->l->system, file->fd, 1);
+}
+
+static const struct pw_stream_events stream_events = {
+	PW_VERSION_STREAM_EVENTS,
+	.param_changed = on_stream_param_changed,
+	.state_changed = on_stream_state_changed,
+	.add_buffer = on_stream_add_buffer,
+	.remove_buffer = on_stream_remove_buffer,
+	.process = on_stream_process,
+};
+
+static int vidioc_enum_framesizes(struct file *file, struct v4l2_frmsizeenum *arg)
+{
+	uint32_t count = 0;
+	struct global *g = file->node;
+	struct param *p;
+	bool found = false;
+
+	pw_log_info("index: %u", arg->index);
+	pw_log_info("format: %.4s", (char*)&arg->pixel_format);
+
+	pw_thread_loop_lock(file->loop);
+	spa_list_for_each(p, &g->param_list, link) {
+		const struct format_info *fi;
+		uint32_t media_type, media_subtype, format;
+		struct spa_rectangle size;
+
+		if (p->id != SPA_PARAM_EnumFormat || p->param == NULL)
+			continue;
+
+		if (spa_format_parse(p->param, &media_type, &media_subtype) < 0)
+			continue;
+		if (media_type != SPA_MEDIA_TYPE_video)
+			continue;
+		if (media_subtype == SPA_MEDIA_SUBTYPE_raw) {
+			if (spa_pod_parse_object(p->param,
+					SPA_TYPE_OBJECT_Format, NULL,
+					SPA_FORMAT_VIDEO_format, SPA_POD_Id(&format)) < 0)
+				continue;
+		} else {
+			format = SPA_VIDEO_FORMAT_ENCODED;
+		}
+
+		fi = format_info_from_media_type(media_type, media_subtype, format);
+		if (fi == NULL)
+			continue;
+
+		if (fi->fourcc != arg->pixel_format)
+			continue;
+		if (spa_pod_parse_object(p->param,
+				SPA_TYPE_OBJECT_Format, NULL,
+				SPA_FORMAT_VIDEO_size, SPA_POD_Rectangle(&size)) < 0)
+			continue;
+
+		arg->type = V4L2_FRMSIZE_TYPE_DISCRETE;
+		arg->discrete.width = size.width;
+		arg->discrete.height = size.height;
+
+		pw_log_debug("count:%d %.4s %dx%d", count, (char*)&fi->fourcc,
+				size.width, size.height);
+		if (count == arg->index) {
+			found = true;
+			break;
+		}
+		count++;
+	}
+	pw_thread_loop_unlock(file->loop);
+
+	if (!found)
+		return -EINVAL;
+
+	switch (arg->type) {
+	case V4L2_FRMSIZE_TYPE_DISCRETE:
+		pw_log_info("type: discrete");
+		pw_log_info("width: %u", arg->discrete.width);
+		pw_log_info("height: %u", arg->discrete.height);
+		break;
+	case V4L2_FRMSIZE_TYPE_CONTINUOUS:
+	case V4L2_FRMSIZE_TYPE_STEPWISE:
+		pw_log_info("type: stepwise");
+		pw_log_info("min-width: %u", arg->stepwise.min_width);
+		pw_log_info("max-width: %u", arg->stepwise.max_width);
+		pw_log_info("step-width: %u", arg->stepwise.step_width);
+		pw_log_info("min-height: %u", arg->stepwise.min_height);
+		pw_log_info("max-height: %u", arg->stepwise.max_height);
+		pw_log_info("step-height: %u", arg->stepwise.step_height);
+		break;
+	}
+
+	memset(arg->reserved, 0, sizeof(arg->reserved));
+
+	return 0;
+}
+
+static int vidioc_enum_fmt(struct file *file, struct v4l2_fmtdesc *arg)
+{
+	uint32_t count = 0, last_fourcc = 0;
+	struct global *g = file->node;
+	struct param *p;
+	bool found = false;
+
+	pw_log_info("index: %u", arg->index);
+	pw_log_info("type: %u", arg->type);
+
+	if (arg->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
+		return -EINVAL;
+
+	pw_thread_loop_lock(file->loop);
+	spa_list_for_each(p, &g->param_list, link) {
+		const struct format_info *fi;
+		uint32_t media_type, media_subtype, format;
+
+		if (p->id != SPA_PARAM_EnumFormat || p->param == NULL)
+			continue;
+
+		if (spa_format_parse(p->param, &media_type, &media_subtype) < 0)
+			continue;
+		if (media_type != SPA_MEDIA_TYPE_video)
+			continue;
+		if (media_subtype == SPA_MEDIA_SUBTYPE_raw) {
+			if (spa_pod_parse_object(p->param,
+					SPA_TYPE_OBJECT_Format, NULL,
+					SPA_FORMAT_VIDEO_format, SPA_POD_Id(&format)) < 0)
+				continue;
+		} else {
+			format = SPA_VIDEO_FORMAT_ENCODED;
+		}
+
+		fi = format_info_from_media_type(media_type, media_subtype, format);
+		if (fi == NULL)
+			continue;
+
+		if (fi->fourcc == last_fourcc)
+			continue;
+		pw_log_info("count:%d fourcc:%.4s last:%.4s", count,
+				(char*)&fi->fourcc, (char*)&last_fourcc);
+
+		arg->flags = fi->format == SPA_VIDEO_FORMAT_ENCODED ? V4L2_FMT_FLAG_COMPRESSED : 0;
+		arg->pixelformat = fi->fourcc;
+		snprintf((char*)arg->description, sizeof(arg->description), "%s",
+				fi->desc ? fi->desc : "Unknown");
+		last_fourcc = fi->fourcc;
+		if (count == arg->index) {
+			found = true;
+			break;
+		}
+		count++;
+	}
+	pw_thread_loop_unlock(file->loop);
+
+	if (!found)
+		return -EINVAL;
+
+	pw_log_info("format: %.4s", (char*)&arg->pixelformat);
+	pw_log_info("flags: %u", arg->type);
+	memset(arg->reserved, 0, sizeof(arg->reserved));
+
+	return 0;
+}
+
+static int vidioc_g_fmt(struct file *file, struct v4l2_format *arg)
+{
+	struct param *p;
+	struct global *g = file->node;
+	int res;
+
+	if (arg->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
+		return -EINVAL;
+
+	pw_thread_loop_lock(file->loop);
+	if (file->v4l2_format.fmt.pix.pixelformat != 0) {
+		*arg = file->v4l2_format;
+	} else {
+		struct v4l2_format tmp;
+		bool found = false;
+
+		spa_list_for_each(p, &g->param_list, link) {
+			if (p->id != SPA_PARAM_EnumFormat || p->param == NULL)
+				continue;
+
+			if (param_to_fmt(p->param, &tmp) < 0)
+				continue;
+
+			found = true;
+			break;
+		}
+		if (!found) {
+			res = -EINVAL;
+			goto exit_unlock;
+		}
+		*arg = file->v4l2_format = tmp;
+	}
+	res = 0;
+exit_unlock:
+	pw_thread_loop_unlock(file->loop);
+	return res;
+}
+
+static int score_diff(struct v4l2_format *fmt, struct v4l2_format *tmp)
+{
+	int score = 0, w, h;
+	if (fmt->fmt.pix.pixelformat != tmp->fmt.pix.pixelformat)
+		score += 20000;
+	w = SPA_ABS((int)fmt->fmt.pix.width - (int)tmp->fmt.pix.width);
+	h = SPA_ABS((int)fmt->fmt.pix.height - (int)tmp->fmt.pix.height);
+	return score + (w*w) + (h*h);
+}
+
+static int try_format(struct file *file, struct v4l2_format *fmt)
+{
+	struct param *p;
+	struct global *g = file->node;
+	struct v4l2_format best_fmt = *fmt;
+	int best = -1;
+
+	pw_log_info("in: type: %u", fmt->type);
+	if (fmt->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
+		return -EINVAL;
+
+	pw_log_info("in: format: %.4s", (char*)&fmt->fmt.pix.pixelformat);
+	pw_log_info("in: width: %u", fmt->fmt.pix.width);
+	pw_log_info("in: height: %u", fmt->fmt.pix.height);
+	pw_log_info("in: field: %u", fmt->fmt.pix.field);
+	spa_list_for_each(p, &g->param_list, link) {
+		struct v4l2_format tmp;
+		int score;
+
+		if (p->param == NULL)
+			continue;
+
+		if (p->id != SPA_PARAM_EnumFormat && p->id != SPA_PARAM_Format)
+			continue;
+
+		if (param_to_fmt(p->param, &tmp) < 0)
+			continue;
+
+		score = score_diff(fmt, &tmp);
+		pw_log_debug("check: type: %u", tmp.type);
+		pw_log_debug("check: format: %.4s", (char*)&tmp.fmt.pix.pixelformat);
+		pw_log_debug("check: width: %u", tmp.fmt.pix.width);
+		pw_log_debug("check: height: %u", tmp.fmt.pix.height);
+		pw_log_debug("check: score: %d best:%d", score, best);
+
+		if (p->id == SPA_PARAM_Format) {
+			best_fmt = tmp;
+			break;
+		}
+		if (best == -1 || score < best) {
+			best = score;
+			best_fmt = tmp;
+		}
+	}
+	*fmt = best_fmt;
+	pw_log_info("out: format: %.4s", (char*)&fmt->fmt.pix.pixelformat);
+	pw_log_info("out: width: %u", fmt->fmt.pix.width);
+	pw_log_info("out: height: %u", fmt->fmt.pix.height);
+	pw_log_info("out: field: %u", fmt->fmt.pix.field);
+	pw_log_info("out: size: %u", fmt->fmt.pix.sizeimage);
+	return 0;
+}
+
+static int disconnect_stream(struct file *file)
+{
+	if (file->stream != NULL) {
+		pw_log_info("file:%d disconnect", file->fd);
+		pw_stream_destroy(file->stream);
+		file->stream = NULL;
+		file->n_buffers = 0;
+	}
+	return 0;
+}
+
+static int connect_stream(struct file *file)
+{
+	int res;
+	struct global *g = file->node;
+	struct timespec abstime;
+	const char *error = NULL;
+	uint8_t buffer[1024];
+	struct spa_pod_builder b = SPA_POD_BUILDER_INIT(buffer, sizeof(buffer));
+	const struct spa_pod *params[1];
+	struct pw_properties *props;
+
+	params[0] = fmt_to_param(&b, SPA_PARAM_EnumFormat, &file->v4l2_format);
+	if (params[0] == NULL) {
+		res = -EINVAL;
+		goto exit;
+	}
+
+	disconnect_stream(file);
+
+	props = pw_properties_new(NULL, NULL);
+	if (props == NULL) {
+		res = -errno;
+		goto exit;
+	}
+
+	pw_properties_set(props, PW_KEY_CLIENT_API, "v4l2");
+	pw_properties_setf(props, PW_KEY_APP_NAME, "%s", pw_get_prgname());
+
+	if (pw_properties_get(props, PW_KEY_MEDIA_TYPE) == NULL)
+		pw_properties_set(props, PW_KEY_MEDIA_TYPE, "Video");
+	if (pw_properties_get(props, PW_KEY_MEDIA_CATEGORY) == NULL)
+		pw_properties_set(props, PW_KEY_MEDIA_CATEGORY, "Capture");
+
+	file->stream = pw_stream_new(file->core, "v4l2 capture", props);
+	if (file->stream == NULL) {
+		res = -errno;
+		goto exit;
+	}
+
+	pw_stream_add_listener(file->stream,
+			&file->stream_listener,
+			&stream_events, file);
+
+
+	file->error = 0;
+
+	pw_stream_connect(file->stream,
+			PW_DIRECTION_INPUT,
+			g->id,
+			PW_STREAM_FLAG_DONT_RECONNECT |
+			PW_STREAM_FLAG_AUTOCONNECT |
+			PW_STREAM_FLAG_RT_PROCESS,
+			params, 1);
+
+	pw_thread_loop_get_time (file->loop, &abstime,
+			DEFAULT_TIMEOUT * SPA_NSEC_PER_SEC);
+
+	while (true) {
+		enum pw_stream_state state = pw_stream_get_state(file->stream, &error);
+
+		if (state == PW_STREAM_STATE_STREAMING)
+			break;
+
+		if (state == PW_STREAM_STATE_ERROR) {
+			res = -EIO;
+			goto exit;
+		}
+		if (file->error < 0) {
+			res = file->error;
+			goto exit;
+		}
+		if (pw_thread_loop_timed_wait_full(file->loop, &abstime) < 0) {
+			res = -ETIMEDOUT;
+			goto exit;
+		}
+	}
+	/* pause stream */
+	res = pw_stream_set_active(file->stream, false);
+exit:
+	return res;
+}
+
+static int vidioc_s_fmt(struct file *file, struct v4l2_format *arg)
+{
+	int res;
+
+	pw_thread_loop_lock(file->loop);
+	if ((res = try_format(file, arg)) < 0)
+		goto exit_unlock;
+
+	file->v4l2_format = *arg;
+
+exit_unlock:
+	pw_thread_loop_unlock(file->loop);
+	return res;
+}
+static int vidioc_try_fmt(struct file *file, struct v4l2_format *arg)
+{
+	int res;
+
+	pw_thread_loop_lock(file->loop);
+	res = try_format(file, arg);
+	pw_thread_loop_unlock(file->loop);
+	return res;
+}
+
+static int vidioc_g_parm(struct file *file, struct v4l2_streamparm *arg)
+{
+	if (arg->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
+		return -EINVAL;
+
+	struct param *p;
+
+	pw_thread_loop_lock(file->loop);
+	bool found = false;
+	struct spa_video_info info;
+	int num = 0, denom = 0;
+
+	spa_list_for_each(p, &file->node->param_list, link) {
+		if (p->id != SPA_PARAM_EnumFormat || p->param == NULL)
+			continue;
+
+		if (param_to_info(p->param, &info) < 0)
+			continue;
+
+		switch (info.media_subtype) {
+			case SPA_MEDIA_SUBTYPE_raw:
+				num = info.info.raw.framerate.num;
+				denom = info.info.raw.framerate.denom;
+				break;
+			case SPA_MEDIA_SUBTYPE_mjpg:
+				num = info.info.mjpg.framerate.num;
+				denom = info.info.mjpg.framerate.denom;
+				break;
+			case SPA_MEDIA_SUBTYPE_h264:
+				num = info.info.h264.framerate.num;
+				denom = info.info.h264.framerate.denom;
+				break;
+		}
+
+		if (num == 0 || denom == 0)
+		  continue;
+
+		found = true;
+		break;
+	}
+
+	if (!found) {
+		pw_thread_loop_unlock(file->loop);
+		return -EINVAL;
+	}
+
+	pw_thread_loop_unlock(file->loop);
+
+	spa_zero(*arg);
+	arg->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+	arg->parm.capture.capability = V4L2_CAP_TIMEPERFRAME;
+	arg->parm.capture.capturemode = 0;
+	arg->parm.capture.extendedmode = 0;
+	arg->parm.capture.readbuffers = 0;
+	arg->parm.capture.timeperframe.numerator = denom;
+	arg->parm.capture.timeperframe.denominator = num;
+
+	pw_log_info("VIDIOC_G_PARM frametime: %d/%d", num, denom);
+
+	return 0;
+}
+
+// TODO: implement setting parameters
+static int vidioc_s_parm(struct file *file, struct v4l2_streamparm *arg)
+{
+	pw_log_warn("VIDIOC_S_PARM is unimplemented, returning current value");
+	vidioc_g_parm(file, arg);
+	return 0;
+}
+
+static int vidioc_enuminput(struct file *file, struct v4l2_input *arg)
+{
+	uint32_t index = arg->index;
+	spa_zero(*arg);
+	arg->index = index;
+	switch (arg->index) {
+	case 0:
+		spa_scnprintf((char*)arg->name, sizeof(arg->name), "%s", DEFAULT_CARD);
+	        arg->type = V4L2_INPUT_TYPE_CAMERA;
+		break;
+	default:
+		return -EINVAL;
+	}
+	return 0;
+}
+static int vidioc_g_input(struct file *file, int *arg)
+{
+	*arg = 0;
+	return 0;
+}
+static int vidioc_s_input(struct file *file, int *arg)
+{
+	if (*arg != 0)
+		return -EINVAL;
+	return 0;
+}
+
+static int vidioc_g_priority(struct file *file, enum v4l2_priority *arg)
+{
+	*arg = file->priority;
+	pw_log_info("file:%d prio:%d", file->fd, *arg);
+	return 0;
+}
+static int vidioc_s_priority(struct file *file, int fd, enum v4l2_priority *arg)
+{
+	if (*arg > V4L2_PRIORITY_RECORD)
+		return -EINVAL;
+
+	if (file->fd != fd && file->priority > *arg)
+		return -EINVAL;
+
+	pw_log_info("file:%d (%d) prio:%d", file->fd, fd, *arg);
+	file->priority = *arg;
+	return 0;
+}
+
+static int vidioc_reqbufs(struct file *file, int fd, struct v4l2_requestbuffers *arg)
+{
+	int res;
+
+	pw_log_info("count: %u", arg->count);
+	pw_log_info("type: %u", arg->type);
+	pw_log_info("memory: %u", arg->memory);
+#ifdef V4L2_MEMORY_FLAG_NON_COHERENT
+	pw_log_info("flags: %08x", arg->flags);
+#endif
+
+	if (arg->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
+		return -EINVAL;
+	if (arg->memory != V4L2_MEMORY_MMAP)
+		return -EINVAL;
+
+	pw_thread_loop_lock(file->loop);
+
+	if (file->n_buffers > 0 && file->reqbufs_fd != fd) {
+		pw_log_info("%u fd:%d != %d", file->n_buffers, file->reqbufs_fd, fd);
+		res = -EBUSY;
+		goto exit_unlock;
+	}
+	if (arg->count == 0) {
+		if (pw_array_get_len(&file->buffer_maps, struct buffer_map) != 0) {
+			pw_log_info("fd:%d have maps", fd);
+			res = -EBUSY;
+			goto exit_unlock;
+		}
+		if (file->running) {
+			pw_log_info("fd:%d running", fd);
+			res = -EBUSY;
+			goto exit_unlock;
+		}
+		res = disconnect_stream(file);
+		file->reqbufs = 0;
+		file->reqbufs_fd = -1;
+	} else {
+		file->reqbufs = arg->count;
+
+		if ((res = connect_stream(file)) < 0)
+			goto exit_unlock;
+
+		arg->count = file->n_buffers;
+		file->reqbufs_fd = fd;
+	}
+#ifdef V4L2_MEMORY_FLAG_NON_COHERENT
+	arg->flags = 0;
+#endif
+#ifdef V4L2_BUF_CAP_SUPPORTS_MMAP
+	arg->capabilities = V4L2_BUF_CAP_SUPPORTS_MMAP;
+#endif
+	memset(arg->reserved, 0, sizeof(arg->reserved));
+
+	pw_log_info("result count: %u", arg->count);
+
+exit_unlock:
+	if (res < 0)
+		pw_log_info("error : %s", spa_strerror(res));
+	pw_thread_loop_unlock(file->loop);
+	return res;
+}
+
+static int vidioc_querybuf(struct file *file, struct v4l2_buffer *arg)
+{
+	int res;
+
+	if (arg->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
+		return -EINVAL;
+
+	pw_thread_loop_lock(file->loop);
+	if (arg->index >= file->n_buffers) {
+		res = -EINVAL;
+		goto exit_unlock;
+	}
+	*arg = file->buffers[arg->index].v4l2;
+
+	res = 0;
+
+exit_unlock:
+	pw_thread_loop_unlock(file->loop);
+
+	return res;
+}
+
+static int vidioc_qbuf(struct file *file, struct v4l2_buffer *arg)
+{
+	int res = 0;
+	struct buffer *buf;
+
+	if (arg->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
+		return -EINVAL;
+	if (arg->memory != V4L2_MEMORY_MMAP)
+		return -EINVAL;
+
+	pw_thread_loop_lock(file->loop);
+	if (arg->index >= file->n_buffers) {
+		res = -EINVAL;
+		goto exit;
+	}
+	buf = &file->buffers[arg->index];
+
+	if (SPA_FLAG_IS_SET(buf->v4l2.flags, V4L2_BUF_FLAG_QUEUED)) {
+		res = -EINVAL;
+		goto exit;
+	}
+
+	SPA_FLAG_SET(buf->v4l2.flags, V4L2_BUF_FLAG_QUEUED);
+	arg->flags = buf->v4l2.flags;
+
+	pw_stream_queue_buffer(file->stream, buf->buf);
+exit:
+	pw_log_debug("file:%d %d -> %d (%s)", file->fd, arg->index, res, spa_strerror(res));
+	pw_thread_loop_unlock(file->loop);
+
+	return res;
+}
+static int vidioc_dqbuf(struct file *file, int fd, struct v4l2_buffer *arg)
+{
+	int res = 0;
+	struct pw_buffer *b;
+	struct buffer *buf;
+	uint64_t val;
+	struct spa_data *d;
+	struct timespec ts;
+
+	if (arg->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
+		return -EINVAL;
+	if (arg->memory != V4L2_MEMORY_MMAP)
+		return -EINVAL;
+
+	pw_log_debug("file:%d (%d) %d", file->fd, fd,
+			arg->index);
+
+	pw_thread_loop_lock(file->loop);
+	if (arg->index >= file->n_buffers) {
+		res = -EINVAL;
+		goto exit_unlock;
+	}
+
+	while (true) {
+		if (!file->running) {
+			res = -EINVAL;
+			goto exit_unlock;
+		}
+
+		b = pw_stream_dequeue_buffer(file->stream);
+		if (b != NULL)
+			break;
+
+		pw_thread_loop_unlock(file->loop);
+		res = spa_system_eventfd_read(file->l->system, fd, &val);
+		pw_thread_loop_lock(file->loop);
+		if (res < 0)
+			goto exit_unlock;
+	}
+
+
+	buf = b->user_data;
+	d = &buf->buf->buffer->datas[0];
+	SPA_FLAG_CLEAR(buf->v4l2.flags, V4L2_BUF_FLAG_QUEUED);
+
+	SPA_FLAG_UPDATE(buf->v4l2.flags, V4L2_BUF_FLAG_ERROR,
+		SPA_FLAG_IS_SET(d->chunk->flags, SPA_CHUNK_FLAG_CORRUPTED));
+
+	SPA_FLAG_SET(buf->v4l2.flags, V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC);
+	clock_gettime(CLOCK_MONOTONIC, &ts);
+	buf->v4l2.timestamp.tv_sec = ts.tv_sec;
+	buf->v4l2.timestamp.tv_usec = ts.tv_nsec / 1000;
+
+	buf->v4l2.field = V4L2_FIELD_NONE;
+	buf->v4l2.bytesused = d->chunk->size;
+	buf->v4l2.sequence = file->sequence++;
+	*arg = buf->v4l2;
+
+exit_unlock:
+	pw_log_debug("file:%d (%d) %d -> %d (%s)", file->fd, fd,
+			arg->index, res, spa_strerror(res));
+	pw_thread_loop_unlock(file->loop);
+	return res;
+}
+
+static int vidioc_streamon(struct file *file, int *arg)
+{
+	int res;
+
+	if (*arg != V4L2_BUF_TYPE_VIDEO_CAPTURE)
+		return -EINVAL;
+
+	pw_thread_loop_lock(file->loop);
+	if (file->n_buffers == 0) {
+		res = -EINVAL;
+		goto exit_unlock;
+	}
+	if (file->running) {
+		res = 0;
+		goto exit_unlock;
+	}
+	res = pw_stream_set_active(file->stream, true);
+	if (res >= 0)
+		file->running = true;
+exit_unlock:
+	pw_thread_loop_unlock(file->loop);
+
+	pw_log_info("file:%d -> %d (%s)", file->fd, res, spa_strerror(res));
+	return res;
+}
+static int vidioc_streamoff(struct file *file, int *arg)
+{
+	int res;
+	uint32_t i;
+
+	if (*arg != V4L2_BUF_TYPE_VIDEO_CAPTURE)
+		return -EINVAL;
+
+	pw_thread_loop_lock(file->loop);
+	for (i = 0; i < file->n_buffers; i++) {
+		struct buffer *buf = &file->buffers[i];
+		SPA_FLAG_CLEAR(buf->v4l2.flags, V4L2_BUF_FLAG_QUEUED);
+	}
+	if (!file->running) {
+		res = 0;
+		goto exit_unlock;
+	}
+	res = pw_stream_set_active(file->stream, false);
+	file->running = false;
+	file->sequence = 0;
+
+exit_unlock:
+	pw_thread_loop_unlock(file->loop);
+
+	pw_log_info("file:%d -> %d (%s)", file->fd, res, spa_strerror(res));
+	return res;
+}
+
+// Copied from spa/plugins/v4l2/v4l2-utils.c
+// TODO: unify with source
+static struct {
+	uint32_t v4l2_id;
+	uint32_t spa_id;
+} control_map[] = {
+	{ V4L2_CID_BRIGHTNESS, SPA_PROP_brightness },
+	{ V4L2_CID_CONTRAST, SPA_PROP_contrast },
+	{ V4L2_CID_SATURATION, SPA_PROP_saturation },
+	{ V4L2_CID_HUE, SPA_PROP_hue },
+	{ V4L2_CID_GAMMA, SPA_PROP_gamma },
+	{ V4L2_CID_EXPOSURE, SPA_PROP_exposure },
+	{ V4L2_CID_GAIN, SPA_PROP_gain },
+	{ V4L2_CID_SHARPNESS, SPA_PROP_sharpness },
+};
+
+static uint32_t prop_id_to_control(uint32_t prop_id)
+{
+	SPA_FOR_EACH_ELEMENT_VAR(control_map, c) {
+		if (c->spa_id == prop_id)
+			return c->v4l2_id;
+	}
+	if (prop_id >= SPA_PROP_START_CUSTOM)
+		return prop_id - SPA_PROP_START_CUSTOM;
+	return SPA_ID_INVALID;
+}
+
+static int vidioc_queryctrl(struct file *file, struct v4l2_queryctrl *arg)
+{
+	struct param *p;
+	bool found = false, next = false;
+
+	memset(arg->reserved, 0, sizeof(arg->reserved));
+
+	// TODO: V4L2_CTRL_FLAG_NEXT_COMPOUND
+	if (arg->id & V4L2_CTRL_FLAG_NEXT_CTRL) {
+		pw_log_debug("VIDIOC_QUERYCTRL: 0x%08" PRIx32 " | V4L2_CTRL_FLAG_NEXT_CTRL", arg->id);
+		arg->id = arg->id & ~V4L2_CTRL_FLAG_NEXT_CTRL & ~V4L2_CTRL_FLAG_NEXT_COMPOUND;
+		next = true;
+	}
+	pw_log_debug("VIDIOC_QUERYCTRL: 0x%08" PRIx32, arg->id);
+
+
+	if (file->node == NULL)
+		return -EIO;
+
+	pw_thread_loop_lock(file->loop);
+
+	// FIXME: place found item into a variable. Will fix unordered ctrls
+	spa_list_for_each(p, &file->node->param_list, link) {
+		uint32_t prop_id, ctrl_id, n_vals, choice = SPA_ID_INVALID;
+		const char *prop_description;
+		const struct spa_pod *type, *pod;
+
+		if (p->id != SPA_PARAM_PropInfo || p->param == NULL)
+			continue;
+
+		if (spa_pod_parse_object(p->param,
+			SPA_TYPE_OBJECT_PropInfo, NULL,
+			SPA_PROP_INFO_id,		SPA_POD_Id(&prop_id),
+			SPA_PROP_INFO_description,	SPA_POD_String(&prop_description)) < 0)
+			continue;
+
+		if ((ctrl_id = prop_id_to_control(prop_id)) == SPA_ID_INVALID)
+			continue;
+
+		if ((next && ctrl_id > arg->id) || (!next && ctrl_id == arg->id)) {
+			if (spa_pod_parse_object(p->param,
+				SPA_TYPE_OBJECT_PropInfo, NULL,
+				SPA_PROP_INFO_type, SPA_POD_PodChoice(&type)) < 0)
+				continue;
+
+			// TODO: support setting controls
+			arg->flags = V4L2_CTRL_FLAG_READ_ONLY;
+			spa_scnprintf((char*)arg->name, sizeof(arg->name), "%s", prop_description);
+
+			// check type and populate range
+			pod = spa_pod_get_values(type, &n_vals, &choice);
+			if (spa_pod_is_int(pod)) {
+				if (n_vals < 4)
+					break;
+				arg->type = V4L2_CTRL_TYPE_INTEGER;
+				int *v = SPA_POD_BODY(pod);
+				arg->default_value = v[0];
+				arg->minimum = v[1];
+				arg->maximum = v[2];
+				arg->step = v[3];
+			}
+			else if (spa_pod_is_bool(pod) && n_vals > 0) {
+				arg->type = V4L2_CTRL_TYPE_BOOLEAN;
+				arg->default_value = SPA_POD_VALUE(struct spa_pod_bool, pod);
+				arg->minimum = 0;
+				arg->maximum = 1;
+				arg->step = 1;
+			}
+			else {
+				break;
+			}
+
+			arg->id = ctrl_id;
+			found = true;
+			pw_log_debug("ctrl 0x%08" PRIx32 " ok", arg->id);
+			break;
+		}
+	}
+
+	pw_thread_loop_unlock(file->loop);
+
+	if (!found) {
+		pw_log_info("not found ctrl 0x%08" PRIx32, arg->id);
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int vidioc_g_ctrl(struct file *file, struct v4l2_control *arg)
+{
+	struct param *p;
+	bool found = false;
+
+	pw_log_debug("VIDIOC_G_CTRL: 0x%08" PRIx32, arg->id);
+
+	if (file->node == NULL)
+		return -EIO;
+
+	pw_thread_loop_lock(file->loop);
+
+	spa_list_for_each(p, &file->node->param_list, link) {
+		uint32_t prop_id, ctrl_id, n_vals, choice = SPA_ID_INVALID;
+		const char *prop_description;
+		const struct spa_pod *type, *pod;
+
+		if (p->id != SPA_PARAM_PropInfo || p->param == NULL)
+			continue;
+
+		if (spa_pod_parse_object(p->param,
+			SPA_TYPE_OBJECT_PropInfo, NULL,
+			SPA_PROP_INFO_id,		SPA_POD_Id(&prop_id),
+			SPA_PROP_INFO_description,	SPA_POD_String(&prop_description)) < 0)
+			continue;
+
+		if ((ctrl_id = prop_id_to_control(prop_id)) == SPA_ID_INVALID)
+			continue;
+
+		if (spa_pod_parse_object(p->param,
+			SPA_TYPE_OBJECT_PropInfo, NULL,
+			SPA_PROP_INFO_type, SPA_POD_PodChoice(&type)) < 0)
+			continue;
+
+		if (ctrl_id == arg->id) {
+			// TODO: support getting true ctrl values instead of defaults
+			pod = spa_pod_get_values(type, &n_vals, &choice);
+			if (spa_pod_is_int(pod)) {
+				if (n_vals < 4)
+					break;
+				int *v = SPA_POD_BODY(pod);
+				arg->value = v[0];
+			}
+			else if (spa_pod_is_bool(pod) && n_vals > 0) {
+				arg->value = SPA_POD_VALUE(struct spa_pod_bool, pod);
+			}
+			else {
+				break;
+			}
+
+			found = true;
+			pw_log_debug("ctrl 0x%08" PRIx32 " ok", arg->id);
+			break;
+		}
+	}
+
+	pw_thread_loop_unlock(file->loop);
+
+	if (!found) {
+		pw_log_info("not found ctrl 0x%08" PRIx32, arg->id);
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int vidioc_s_ctrl(struct file *file, struct v4l2_control *arg)
+{
+	struct param *p;
+	bool found = false;
+
+	pw_log_info("VIDIOC_S_CTRL: 0x%08" PRIx32 " 0x%08" PRIx32, arg->id, arg->value);
+
+	if (file->node == NULL)
+		return -EIO;
+
+	pw_thread_loop_lock(file->loop);
+
+	spa_list_for_each(p, &file->node->param_list, link) {
+		uint32_t prop_id, ctrl_id, n_vals, choice = SPA_ID_INVALID;
+		const char *prop_description;
+		const struct spa_pod *type, *pod;
+
+		if (p->id != SPA_PARAM_PropInfo || p->param == NULL)
+			continue;
+
+		if (spa_pod_parse_object(p->param,
+			SPA_TYPE_OBJECT_PropInfo, NULL,
+			SPA_PROP_INFO_id,		SPA_POD_Id(&prop_id),
+			SPA_PROP_INFO_description,	SPA_POD_String(&prop_description)) < 0)
+			continue;
+
+		if ((ctrl_id = prop_id_to_control(prop_id)) == SPA_ID_INVALID)
+			continue;
+
+		if (spa_pod_parse_object(p->param,
+			SPA_TYPE_OBJECT_PropInfo, NULL,
+			SPA_PROP_INFO_type, SPA_POD_PodChoice(&type)) < 0)
+			continue;
+
+		if (ctrl_id == arg->id) {
+			char buf[1024];
+			struct spa_pod_builder b = SPA_POD_BUILDER_INIT(buf, sizeof(buf));
+			struct spa_pod_frame f[1];
+			struct spa_pod *param;
+			pod = spa_pod_get_values(type, &n_vals, &choice);
+
+			spa_pod_builder_push_object(&b, &f[0],
+					SPA_TYPE_OBJECT_Props,  SPA_PARAM_Props);
+
+			if (spa_pod_is_int(pod)) {
+				spa_pod_builder_add(&b, prop_id, SPA_POD_Int(arg->value), 0);
+			} else if (spa_pod_is_bool(pod)) {
+				spa_pod_builder_add(&b, prop_id, SPA_POD_Bool(arg->value), 0);
+			} else {
+				// TODO: float and other formats
+				pw_log_info("unknown type");
+				break;
+			}
+
+			param = spa_pod_builder_pop(&b, &f[0]);
+			pw_node_set_param(file->node->proxy, SPA_PARAM_Props, 0, param);
+
+			found = true;
+			pw_log_info("ctrl 0x%08" PRIx32 " set ok", arg->id);
+			break;
+		}
+	}
+
+	pw_thread_loop_unlock(file->loop);
+
+	if (!found) {
+		pw_log_info("not found ctrl 0x%08" PRIx32, arg->id);
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int v4l2_ioctl(int fd, unsigned long int request, void *arg)
+{
+	int res;
+	struct file *file;
+	uint32_t flags;
+
+	if ((file = find_file(fd, &flags)) == NULL)
+		return globals.old_fops.ioctl(fd, request, arg);
+
+#if defined(__FreeBSD__) || defined(__MidnightBSD__)
+	if (arg == NULL && (request & IOC_DIRMASK != IOC_VOID)) {
+#else
+	if (arg == NULL && (_IOC_DIR(request) & (_IOC_WRITE | _IOC_READ))) {
+#endif
+		res = -EFAULT;
+		goto done;
+	}
+
+	if (flags & FD_MAP_DUP)
+		fd = file->fd;
+
+	switch (request & 0xffffffff) {
+	case VIDIOC_QUERYCAP:
+		res = vidioc_querycap(file, (struct v4l2_capability *)arg);
+		break;
+	case VIDIOC_ENUM_FRAMESIZES:
+		res = vidioc_enum_framesizes(file, (struct v4l2_frmsizeenum *)arg);
+		break;
+	case VIDIOC_ENUM_FMT:
+		res = vidioc_enum_fmt(file, (struct v4l2_fmtdesc *)arg);
+		break;
+	case VIDIOC_G_FMT:
+		res = vidioc_g_fmt(file, (struct v4l2_format *)arg);
+		break;
+	case VIDIOC_S_FMT:
+		res = vidioc_s_fmt(file, (struct v4l2_format *)arg);
+		break;
+	case VIDIOC_TRY_FMT:
+		res = vidioc_try_fmt(file, (struct v4l2_format *)arg);
+		break;
+	case VIDIOC_G_PARM:
+		res = vidioc_g_parm(file, (struct v4l2_streamparm *)arg);
+		break;
+	case VIDIOC_S_PARM:
+		res = vidioc_s_parm(file, (struct v4l2_streamparm *)arg);
+		break;
+	case VIDIOC_ENUMINPUT:
+		res = vidioc_enuminput(file, (struct v4l2_input *)arg);
+		break;
+	case VIDIOC_G_INPUT:
+		res = vidioc_g_input(file, (int *)arg);
+		break;
+	case VIDIOC_S_INPUT:
+		res = vidioc_s_input(file, (int *)arg);
+		break;
+	case VIDIOC_G_PRIORITY:
+		res = vidioc_g_priority(file, (enum v4l2_priority *)arg);
+		break;
+	case VIDIOC_S_PRIORITY:
+		res = vidioc_s_priority(file, fd, (enum v4l2_priority *)arg);
+		break;
+	case VIDIOC_REQBUFS:
+		res = vidioc_reqbufs(file, fd, (struct v4l2_requestbuffers *)arg);
+		break;
+	case VIDIOC_QUERYBUF:
+		res = vidioc_querybuf(file, (struct v4l2_buffer *)arg);
+		break;
+	case VIDIOC_QBUF:
+		res = vidioc_qbuf(file, (struct v4l2_buffer *)arg);
+		break;
+	case VIDIOC_DQBUF:
+		res = vidioc_dqbuf(file, fd, (struct v4l2_buffer *)arg);
+		break;
+	case VIDIOC_STREAMON:
+		res = vidioc_streamon(file, (int *)arg);
+		break;
+	case VIDIOC_STREAMOFF:
+		res = vidioc_streamoff(file, (int *)arg);
+		break;
+	// TODO: VIDIOC_QUERY_EXT_CTRL
+	case VIDIOC_QUERYCTRL:
+		res = vidioc_queryctrl(file, (struct v4l2_queryctrl *)arg);
+		break;
+	case VIDIOC_G_CTRL:
+		res = vidioc_g_ctrl(file, (struct v4l2_control *)arg);
+		break;
+	case VIDIOC_S_CTRL:
+		res = vidioc_s_ctrl(file, (struct v4l2_control *)arg);
+		break;
+	default:
+		res = -ENOTTY;
+		break;
+	}
+done:
+	if (res < 0) {
+		errno = -res;
+		res = -1;
+	}
+	pw_log_debug("file:%d fd:%d request:%lx nr:%d arg:%p -> %d (%s)",
+			file->fd, fd, request, (int)_IOC_NR(request), arg,
+			res, strerror(res < 0 ? errno : 0));
+
+	unref_file(file);
+
+	return res;
+}
+
+static void *v4l2_mmap(void *addr, size_t length, int prot,
+			int flags, int fd, off64_t offset)
+{
+	void *res;
+	struct file *file;
+	off64_t id;
+	struct pw_map_range range;
+	struct buffer *buf;
+	struct spa_data *data;
+	uint32_t fl;
+
+	if ((file = find_file(fd, &fl)) == NULL)
+		return globals.old_fops.mmap(addr, length, prot, flags, fd, offset);
+
+	pw_thread_loop_lock(file->loop);
+	if (file->size == 0) {
+		errno = EIO;
+		res = MAP_FAILED;
+		goto error_unlock;
+	}
+	id = offset / file->size;
+	if ((id * file->size) != offset || file->size != length) {
+		errno = EINVAL;
+		res = MAP_FAILED;
+		goto error_unlock;
+	}
+	buf = &file->buffers[id];
+	data = &buf->buf->buffer->datas[0];
+
+        pw_map_range_init(&range, data->mapoffset, data->maxsize, 1024);
+
+	if (!SPA_FLAG_IS_SET(data->flags, SPA_DATA_FLAG_READABLE))
+		prot &= ~PROT_READ;
+	if (!SPA_FLAG_IS_SET(data->flags, SPA_DATA_FLAG_WRITABLE))
+		prot &= ~PROT_WRITE;
+
+	if (data->data == NULL)
+		res = globals.old_fops.mmap(addr, range.size, prot, flags, data->fd, range.offset);
+	else
+		res = data->data;
+
+	add_file_map(file, res);
+	add_buffer_map(file, res, id);
+	SPA_FLAG_SET(buf->v4l2.flags, V4L2_BUF_FLAG_MAPPED);
+
+	pw_log_info("file:%d addr:%p length:%zu prot:%d flags:%d fd:%"PRIi64
+			" offset:%"PRIi64" (%u - %u) -> %p (%s)" ,
+			file->fd, addr, length, prot, flags, data->fd, offset,
+			range.offset, range.size,
+			res, strerror(res == MAP_FAILED ? errno : 0));
+
+error_unlock:
+	pw_thread_loop_unlock(file->loop);
+	unref_file(file);
+	return res;
+}
+
+static int v4l2_munmap(void *addr, size_t length)
+{
+	int res;
+	struct buffer_map *bmap;
+	struct buffer *buf;
+	struct file *file;
+	struct spa_data *data;
+
+	if ((file = remove_file_map(addr)) == NULL)
+		return globals.old_fops.munmap(addr, length);
+
+	pw_thread_loop_lock(file->loop);
+
+	bmap = find_buffer_map(file, addr);
+	if (bmap == NULL) {
+		res = -EINVAL;
+		goto exit_unlock;
+	}
+	buf = &file->buffers[bmap->id];
+	data = &buf->buf->buffer->datas[0];
+
+	if (data->data == NULL)
+		res = globals.old_fops.munmap(addr, length);
+	else
+		res = 0;
+
+	pw_log_info("addr:%p length:%zu -> %d (%s)", addr, length,
+			res, strerror(res < 0 ? errno : 0));
+
+	buf->v4l2.flags &= ~V4L2_BUF_FLAG_MAPPED;
+	remove_buffer_map(file, bmap);
+
+exit_unlock:
+	pw_thread_loop_unlock(file->loop);
+
+	return res;
+}
+
+const struct fops fops = {
+	.openat = v4l2_openat,
+	.dup = v4l2_dup,
+	.close = v4l2_close,
+	.ioctl = v4l2_ioctl,
+	.mmap = v4l2_mmap,
+	.munmap = v4l2_munmap,
+};
+
+static void initialize(void)
+{
+	globals.old_fops.openat = dlsym(RTLD_NEXT, "openat64");
+	globals.old_fops.dup = dlsym(RTLD_NEXT, "dup");
+	globals.old_fops.close = dlsym(RTLD_NEXT, "close");
+	globals.old_fops.ioctl = dlsym(RTLD_NEXT, "ioctl");
+	globals.old_fops.mmap = dlsym(RTLD_NEXT, "mmap64");
+	globals.old_fops.munmap = dlsym(RTLD_NEXT, "munmap");
+
+	pw_init(NULL, NULL);
+	PW_LOG_TOPIC_INIT(v4l2_log_topic);
+
+	pthread_mutex_init(&globals.lock, NULL);
+	pw_array_init(&globals.file_maps, 1024);
+	pw_array_init(&globals.fd_maps, 256);
+}
+
+const struct fops *get_fops(void)
+{
+	static pthread_once_t initialized = PTHREAD_ONCE_INIT;
+        pthread_once(&initialized, initialize);
+	return &fops;
+}
diff --git a/pipewire-v4l2/src/pipewire-v4l2.h b/pipewire-v4l2/src/pipewire-v4l2.h
new file mode 100644
index 0000000..6ac2ae9
--- /dev/null
+++ b/pipewire-v4l2/src/pipewire-v4l2.h
@@ -0,0 +1,38 @@
+/* PipeWire
+ *
+ * Copyright © 2021 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 <fcntl.h>
+
+struct fops {
+	int (*openat)(int dirfd, const char *path, int oflag, mode_t mode);
+	int (*dup)(int oldfd);
+	int (*close)(int fd);
+	int (*ioctl)(int fd, unsigned long request, void *arg);
+	void *(*mmap)(void *addr, size_t length, int prot,
+			int flags, int fd, off64_t offset);
+	int (*munmap)(void *addr, size_t length);
+};
+
+const struct fops *get_fops(void);
diff --git a/pipewire-v4l2/src/pw-v4l2.in b/pipewire-v4l2/src/pw-v4l2.in
new file mode 100755
index 0000000..248d9ee
--- /dev/null
+++ b/pipewire-v4l2/src/pw-v4l2.in
@@ -0,0 +1,71 @@
+#!/bin/sh
+
+# This file is part of PipeWire.
+#
+# Copyright © 2021 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.
+#
+
+while getopts 'hr:vs:p:' param ; do
+	case $param in
+		r)
+			PIPEWIRE_REMOTE="$OPTARG"
+			export PIPEWIRE_REMOTE
+			;;
+		v)
+			if [ -z "$PIPEWIRE_DEBUG" ]; then
+				PIPEWIRE_DEBUG=3
+			else
+				PIPEWIRE_DEBUG=$(( PIPEWIRE_DEBUG + 1 ))
+			fi
+			export PIPEWIRE_DEBUG
+			;;
+		*)
+			echo "$0 - run v4l2 applications on PipeWire"
+			echo " "
+			echo "$0 [options] application [arguments]"
+			echo " "
+			echo "options:"
+			echo "	-h                  show brief help"
+			echo "	-r <remote>         remote daemon name"
+			echo "	-v                  verbose debug info"
+			exit 0
+			;;
+	esac
+done
+
+shift $(( OPTIND - 1 ))
+
+if [ "$PW_UNINSTALLED" = 1 ] ; then
+   PW_V4L2_LD_PRELOAD="$PW_BUILDDIR"'/pipewire-v4l2/src/libpw-v4l2.so'
+else
+   PW_V4L2_LD_PRELOAD='@LIBV4L2_PATH@/libpw-v4l2.so'
+fi
+
+if [ "$LD_PRELOAD" = "" ] ; then
+   LD_PRELOAD="$PW_V4L2_LD_PRELOAD"
+else
+   LD_PRELOAD="$LD_PRELOAD $PW_V4L2_LD_PRELOAD"
+fi
+
+export LD_PRELOAD
+
+exec "$@"
diff --git a/pipewire-v4l2/src/v4l2-func.c b/pipewire-v4l2/src/v4l2-func.c
new file mode 100644
index 0000000..c28e834
--- /dev/null
+++ b/pipewire-v4l2/src/v4l2-func.c
@@ -0,0 +1,150 @@
+/* PipeWire
+ *
+ * Copyright © 2021 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.
+ */
+
+
+/*
+ * We need to export open* etc., but _FORTIFY_SOURCE defines conflicting
+ * always_inline versions. Disable _FORTIFY_SOURCE for this file, so we
+ * can define our overrides.
+ */
+#ifdef _FORTIFY_SOURCE
+#undef _FORTIFY_SOURCE
+#endif
+
+#include <stdio.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <stdarg.h>
+#include <sys/mman.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+
+#include "pipewire-v4l2.h"
+
+#define SPA_EXPORT __attribute__((visibility("default")))
+
+#define extract_va_arg(type, arg, last)	\
+{					\
+	va_list ap;			\
+	va_start(ap, last);		\
+	arg = va_arg(ap, type);		\
+	va_end(ap);			\
+}
+
+SPA_EXPORT int open(const char *path, int oflag, ...)
+{
+	mode_t mode = 0;
+	if (oflag & O_CREAT || oflag & O_TMPFILE)
+		extract_va_arg(mode_t, mode, oflag);
+
+	return get_fops()->openat(AT_FDCWD, path, oflag, mode);
+}
+
+/* _FORTIFY_SOURCE redirects open to __open_2 */
+SPA_EXPORT int __open_2(const char *path, int oflag)
+{
+	return open(path, oflag);
+}
+
+#ifndef open64
+SPA_EXPORT int open64(const char *path, int oflag, ...)
+{
+	mode_t mode = 0;
+	if (oflag & O_CREAT || oflag & O_TMPFILE)
+		extract_va_arg(mode_t, mode, oflag);
+
+	return get_fops()->openat(AT_FDCWD, path, oflag | O_LARGEFILE, mode);
+}
+
+SPA_EXPORT int __open64_2(const char *path, int oflag)
+{
+        return open(path, oflag);
+}
+#endif
+
+SPA_EXPORT int openat(int dirfd, const char *path, int oflag, ...)
+{
+	mode_t mode = 0;
+	if (oflag & O_CREAT || oflag & O_TMPFILE)
+		extract_va_arg(mode_t, mode, oflag);
+
+	return get_fops()->openat(dirfd, path, oflag, mode);
+}
+
+SPA_EXPORT int __openat_2(int dirfd, const char *path, int oflag)
+{
+	return openat(dirfd, path, oflag);
+}
+
+#ifndef openat64
+SPA_EXPORT int openat64(int dirfd, const char *path, int oflag, ...)
+{
+	mode_t mode = 0;
+	if (oflag & O_CREAT || oflag & O_TMPFILE)
+		extract_va_arg(mode_t, mode, oflag);
+
+	return get_fops()->openat(dirfd, path, oflag | O_LARGEFILE, mode);
+}
+
+SPA_EXPORT int __openat64_2(int dirfd, const char *path, int oflag)
+{
+	return openat(dirfd, path, oflag);
+}
+#endif
+
+SPA_EXPORT int dup(int oldfd)
+{
+	return get_fops()->dup(oldfd);
+}
+
+SPA_EXPORT int close(int fd)
+{
+	return get_fops()->close(fd);
+}
+
+SPA_EXPORT void *mmap(void *addr, size_t length, int prot, int flags,
+                            int fd, off_t offset)
+{
+	return get_fops()->mmap(addr, length, prot, flags, fd, offset);
+}
+
+#ifndef mmap64
+SPA_EXPORT void *mmap64(void *addr, size_t length, int prot, int flags,
+                              int fd, off64_t offset)
+{
+	return get_fops()->mmap(addr, length, prot, flags, fd, offset);
+}
+#endif
+
+SPA_EXPORT int munmap(void *addr, size_t length)
+{
+	return get_fops()->munmap(addr, length);
+}
+
+SPA_EXPORT int ioctl(int fd, unsigned long int request, ...)
+{
+	void *arg;
+	extract_va_arg(void *, arg, request);
+	return get_fops()->ioctl(fd, request, arg);
+}