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/* PipeWire
*
* Copyright © 2018 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 "spa-device.h"
#define NAME "spa-device-factory"
#define FACTORY_USAGE SPA_KEY_FACTORY_NAME"=<factory-name> " \
"["SPA_KEY_LIBRARY_NAME"=<library-name>]"
static const struct spa_dict_item module_props[] = {
{ PW_KEY_MODULE_AUTHOR, "Wim Taymans <wim.taymans@gmail.com>" },
{ PW_KEY_MODULE_DESCRIPTION, "Provide a factory to make SPA devices" },
{ PW_KEY_MODULE_VERSION, PACKAGE_VERSION },
};
struct factory_data {
struct pw_context *context;
struct pw_module *module;
struct pw_factory *this;
struct spa_hook factory_listener;
struct spa_hook module_listener;
struct spa_list device_list;
};
struct device_data {
struct spa_list link;
struct pw_device *device;
struct spa_hook device_listener;
};
static void device_destroy(void *data)
{
struct device_data *nd = data;
spa_list_remove(&nd->link);
spa_hook_remove(&nd->device_listener);
}
static const struct pw_device_events device_events = {
PW_VERSION_DEVICE_EVENTS,
.destroy = device_destroy,
};
static void *create_object(void *_data,
struct pw_resource *resource,
uint32_t type,
uint32_t version,
struct pw_properties *properties,
uint32_t new_id)
{
struct factory_data *data = _data;
struct pw_context *context = data->context;
struct pw_device *device;
const char *factory_name;
struct device_data *nd;
struct pw_client *client;
int res;
if (properties == NULL)
goto error_properties;
factory_name = pw_properties_get(properties, SPA_KEY_FACTORY_NAME);
if (factory_name == NULL)
goto error_properties;
pw_properties_setf(properties, PW_KEY_FACTORY_ID, "%d",
pw_global_get_id(pw_factory_get_global(data->this)));
client = resource ? pw_resource_get_client(resource) : NULL;
if (client) {
pw_properties_setf(properties, PW_KEY_CLIENT_ID, "%d",
pw_global_get_id(pw_client_get_global(client)));
}
device = pw_spa_device_load(context,
factory_name,
0,
properties,
sizeof(struct device_data));
if (device == NULL) {
res = -errno;
goto error_device;
}
nd = pw_spa_device_get_user_data(device);
nd->device = device;
spa_list_append(&data->device_list, &nd->link);
pw_device_add_listener(device, &nd->device_listener, &device_events, nd);
if (client) {
pw_global_bind(pw_device_get_global(device),
client,
PW_PERM_RWX, version,
new_id);
}
return device;
error_properties:
res = -EINVAL;
pw_log_error("factory %p: usage: " FACTORY_USAGE, data->this);
if (resource)
pw_resource_error(resource, res, "usage: " FACTORY_USAGE);
goto error_exit;
error_device:
pw_log_error("can't create device: %s", spa_strerror(res));
if (resource)
pw_resource_errorf(resource, res, "can't create device: %s", spa_strerror(res));
goto error_exit;
error_exit:
errno = -res;
return NULL;
}
static const struct pw_factory_implementation factory_impl = {
PW_VERSION_FACTORY_IMPLEMENTATION,
.create_object = create_object,
};
static void factory_destroy(void *_data)
{
struct factory_data *data = _data;
struct device_data *nd;
spa_hook_remove(&data->module_listener);
spa_list_consume(nd, &data->device_list, link)
pw_device_destroy(nd->device);
}
static const struct pw_factory_events factory_events = {
PW_VERSION_FACTORY_IMPLEMENTATION,
.destroy = factory_destroy,
};
static void module_destroy(void *_data)
{
struct factory_data *data = _data;
pw_factory_destroy(data->this);
}
static void module_registered(void *data)
{
struct factory_data *d = data;
struct pw_module *module = d->module;
struct pw_factory *factory = d->this;
struct spa_dict_item items[1];
char id[16];
int res;
snprintf(id, sizeof(id), "%d", pw_global_get_id(pw_module_get_global(module)));
items[0] = SPA_DICT_ITEM_INIT(PW_KEY_MODULE_ID, id);
pw_factory_update_properties(factory, &SPA_DICT_INIT(items, 1));
if ((res = pw_factory_register(factory, NULL)) < 0) {
pw_log_error(NAME" %p: can't register factory: %s", factory, spa_strerror(res));
}
}
static const struct pw_module_events module_events = {
PW_VERSION_MODULE_EVENTS,
.destroy = module_destroy,
.registered = module_registered,
};
SPA_EXPORT
int pipewire__module_init(struct pw_module *module, const char *args)
{
struct pw_context *context = pw_module_get_context(module);
struct pw_factory *factory;
struct factory_data *data;
factory = pw_factory_new(context,
"spa-device-factory",
PW_TYPE_INTERFACE_Device,
PW_VERSION_DEVICE_PROXY,
NULL,
sizeof(*data));
if (factory == NULL)
return -errno;
data = pw_factory_get_user_data(factory);
data->this = factory;
data->module = module;
data->context = context;
spa_list_init(&data->device_list);
pw_factory_add_listener(factory, &data->factory_listener, &factory_events, data);
pw_factory_set_implementation(factory, &factory_impl, data);
pw_log_debug("module %p: new", module);
pw_module_update_properties(module, &SPA_DICT_INIT_ARRAY(module_props));
pw_module_add_listener(module, &data->module_listener, &module_events, data);
return 0;
}
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