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/* PipeWire
*
* 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 <string.h>
#include <stdio.h>
#include <errno.h>
#include <dlfcn.h>
#include "config.h"
#include <spa/utils/result.h>
#include <pipewire/impl.h>
#include "module-client-device/client-device.h"
/** \page page_module_client_device PipeWire Module: Client Device
*/
#define NAME "client-device"
PW_LOG_TOPIC_STATIC(mod_topic, "mod." NAME);
#define PW_LOG_TOPIC_DEFAULT mod_topic
static const struct spa_dict_item module_props[] = {
{ PW_KEY_MODULE_AUTHOR, "Wim Taymans <wim.taymans@gmail.com>" },
{ PW_KEY_MODULE_DESCRIPTION, "Allow clients to create and control remote devices" },
{ PW_KEY_MODULE_VERSION, PACKAGE_VERSION },
};
struct pw_proxy *pw_core_spa_device_export(struct pw_core *core,
const char *type, const struct spa_dict *props, void *object,
size_t user_data_size);
struct pw_protocol *pw_protocol_native_ext_client_device_init(struct pw_context *context);
struct factory_data {
struct pw_impl_factory *factory;
struct spa_hook factory_listener;
struct pw_impl_module *module;
struct spa_hook module_listener;
struct pw_export_type export_spadevice;
};
static void *create_object(void *_data,
struct pw_resource *resource,
const char *type,
uint32_t version,
struct pw_properties *properties,
uint32_t new_id)
{
struct factory_data *data = _data;
struct pw_impl_factory *factory = data->factory;
void *result;
struct pw_resource *device_resource;
struct pw_impl_client *client;
int res;
if (resource == NULL) {
res = -EINVAL;
goto error_exit;
}
client = pw_resource_get_client(resource);
device_resource = pw_resource_new(client, new_id, PW_PERM_ALL, type, version, 0);
if (device_resource == NULL) {
res = -errno;
goto error_resource;
}
if (properties == NULL)
properties = pw_properties_new(NULL, NULL);
if (properties == NULL) {
res = -errno;
goto error_properties;
}
pw_properties_setf(properties, PW_KEY_FACTORY_ID, "%d",
pw_global_get_id(pw_impl_factory_get_global(factory)));
pw_properties_setf(properties, PW_KEY_CLIENT_ID, "%d",
pw_global_get_id(pw_impl_client_get_global(client)));
result = pw_client_device_new(device_resource, properties);
if (result == NULL) {
res = -errno;
goto error_device;
}
return result;
error_resource:
pw_log_error("can't create resource: %s", spa_strerror(res));
pw_resource_errorf_id(resource, new_id, res, "can't create resource: %s", spa_strerror(res));
goto error_exit;
error_properties:
pw_log_error("can't create properties: %s", spa_strerror(res));
pw_resource_errorf_id(resource, new_id, res, "can't create properties: %s", spa_strerror(res));
goto error_exit_free;
error_device:
pw_log_error("can't create device: %s", spa_strerror(res));
pw_resource_errorf_id(resource, new_id, res, "can't create device: %s", spa_strerror(res));
goto error_exit_free;
error_exit_free:
pw_resource_remove(device_resource);
error_exit:
errno = -res;
return NULL;
}
static const struct pw_impl_factory_implementation impl_factory = {
PW_VERSION_IMPL_FACTORY_IMPLEMENTATION,
.create_object = create_object,
};
static void factory_destroy(void *data)
{
struct factory_data *d = data;
spa_hook_remove(&d->factory_listener);
d->factory = NULL;
if (d->module)
pw_impl_module_destroy(d->module);
}
static const struct pw_impl_factory_events factory_events = {
PW_VERSION_IMPL_FACTORY_EVENTS,
.destroy = factory_destroy,
};
static void module_destroy(void *data)
{
struct factory_data *d = data;
spa_hook_remove(&d->module_listener);
spa_list_remove(&d->export_spadevice.link);
d->module = NULL;
if (d->factory)
pw_impl_factory_destroy(d->factory);
}
static void module_registered(void *data)
{
struct factory_data *d = data;
struct pw_impl_module *module = d->module;
struct pw_impl_factory *factory = d->factory;
struct spa_dict_item items[1];
char id[16];
int res;
snprintf(id, sizeof(id), "%d", pw_global_get_id(pw_impl_module_get_global(module)));
items[0] = SPA_DICT_ITEM_INIT(PW_KEY_MODULE_ID, id);
pw_impl_factory_update_properties(factory, &SPA_DICT_INIT(items, 1));
if ((res = pw_impl_factory_register(factory, NULL)) < 0) {
pw_log_error("%p: can't register factory: %s", factory, spa_strerror(res));
}
}
static const struct pw_impl_module_events module_events = {
PW_VERSION_IMPL_MODULE_EVENTS,
.destroy = module_destroy,
.registered = module_registered,
};
SPA_EXPORT
int pipewire__module_init(struct pw_impl_module *module, const char *args)
{
struct pw_context *context = pw_impl_module_get_context(module);
struct pw_impl_factory *factory;
struct factory_data *data;
int res;
PW_LOG_TOPIC_INIT(mod_topic);
factory = pw_context_create_factory(context,
"client-device",
SPA_TYPE_INTERFACE_Device,
SPA_VERSION_DEVICE,
pw_properties_new(
PW_KEY_FACTORY_USAGE, CLIENT_DEVICE_USAGE,
NULL),
sizeof(*data));
if (factory == NULL)
return -errno;
data = pw_impl_factory_get_user_data(factory);
data->factory = factory;
data->module = module;
pw_log_debug("module %p: new", module);
pw_impl_factory_set_implementation(factory,
&impl_factory,
data);
data->export_spadevice.type = SPA_TYPE_INTERFACE_Device;
data->export_spadevice.func = pw_core_spa_device_export;
if ((res = pw_context_register_export_type(context, &data->export_spadevice)) < 0)
goto error;
pw_protocol_native_ext_client_device_init(context);
pw_impl_factory_add_listener(factory, &data->factory_listener, &factory_events, data);
pw_impl_module_add_listener(module, &data->module_listener, &module_events, data);
pw_impl_module_update_properties(module, &SPA_DICT_INIT_ARRAY(module_props));
return 0;
error:
pw_impl_factory_destroy(data->factory);
return res;
}
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