tutorial6.c

Tutorial - Part 6: Binding Objects

/*
  [title]
  \ref page_tutorial6
  [title]
 */
/* [code] */
#include <pipewire/pipewire.h>
 
struct data {
        struct pw_main_loop *loop;
        struct pw_context *context;
        struct pw_core *core;
 
        struct pw_registry *registry;
        struct spa_hook registry_listener;
 
        struct pw_client *client;
        struct spa_hook client_listener;
};
 
/* [client_info] */
static void client_info(void *object, const struct pw_client_info *info)
{
        struct data *data = object;
        const struct spa_dict_item *item;
 
        printf("client: id:%u\n", info->id);
        printf("\tprops:\n");
        spa_dict_for_each(item, info->props)
                printf("\t\t%s: \"%s\"\n", item->key, item->value);
 
        pw_main_loop_quit(data->loop);
}
 
static const struct pw_client_events client_events = {
        PW_VERSION_CLIENT_EVENTS,
        .info = client_info,
};
/* [client_info] */
 
/* [registry_event_global] */
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 data *data = _data;
        if (data->client != NULL)
                return;
 
        if (strcmp(type, PW_TYPE_INTERFACE_Client) == 0) {
                data->client = pw_registry_bind(data->registry,
                                id, type, PW_VERSION_CLIENT, 0);
                pw_client_add_listener(data->client,
                                &data->client_listener,
                                &client_events, data);
        }
}
/* [registry_event_global] */
 
static const struct pw_registry_events registry_events = {
        PW_VERSION_REGISTRY_EVENTS,
        .global = registry_event_global,
};
 
int main(int argc, char *argv[])
{
        struct data data;
 
        spa_zero(data);
 
        pw_init(&argc, &argv);
 
        data.loop = pw_main_loop_new(NULL /* properties */ );
        data.context = pw_context_new(pw_main_loop_get_loop(data.loop),
                                 NULL /* properties */ ,
                                 0 /* user_data size */ );
 
        data.core = pw_context_connect(data.context, NULL /* properties */ ,
                                  0 /* user_data size */ );
 
        data.registry = pw_core_get_registry(data.core, PW_VERSION_REGISTRY,
                                        0 /* user_data size */ );
 
        pw_registry_add_listener(data.registry, &data.registry_listener,
                                 &registry_events, &data);
 
        pw_main_loop_run(data.loop);
 
        pw_proxy_destroy((struct pw_proxy *)data.client);
        pw_proxy_destroy((struct pw_proxy *)data.registry);
        pw_core_disconnect(data.core);
        pw_context_destroy(data.context);
        pw_main_loop_destroy(data.loop);
 
        return 0;
}
/* [code] */