PipeWire: tutorial6.c

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tutorial6.c

Tutorial - Part 6: Binding Objects

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] */
PW_TYPE_INTERFACE_Client
#define PW_TYPE_INTERFACE_Client
Definition client.h:32
pw_client_add_listener
PW_API_CLIENT_IMPL int pw_client_add_listener(struct pw_client *object, struct spa_hook *listener, const struct pw_client_events *events, void *data)
Definition client.h:183
PW_VERSION_CLIENT_EVENTS
#define PW_VERSION_CLIENT_EVENTS
Definition client.h:84
PW_VERSION_CLIENT
#define PW_VERSION_CLIENT
Definition client.h:38
pw_context_destroy
void pw_context_destroy(struct pw_context *context)
destroy a context object, all resources except the main_loop will be destroyed
Definition context.c:522
pw_context_new
struct pw_context * pw_context_new(struct pw_loop *main_loop, struct pw_properties *props, size_t user_data_size)
Make a new context object for a given main_loop.
Definition context.c:310
pw_context_connect
struct pw_core * pw_context_connect(struct pw_context *context, struct pw_properties *properties, size_t user_data_size)
Connect to a PipeWire instance.
Definition core.c:410
pw_core_get_registry
PW_API_CORE_IMPL struct pw_registry * pw_core_get_registry(struct pw_core *core, uint32_t version, size_t user_data_size)
Get the registry object.
Definition core.h:457
pw_core_disconnect
int pw_core_disconnect(struct pw_core *core)
disconnect and destroy a core
Definition core.c:506
PW_VERSION_REGISTRY
#define PW_VERSION_REGISTRY
Definition core.h:54
pw_main_loop_quit
int pw_main_loop_quit(struct pw_main_loop *loop)
Quit a main loop.
Definition main-loop.c:108
pw_main_loop_destroy
void pw_main_loop_destroy(struct pw_main_loop *loop)
Destroy a loop.
Definition main-loop.c:73
pw_main_loop_run
int pw_main_loop_run(struct pw_main_loop *loop)
Run a main loop.
Definition main-loop.c:122
pw_main_loop_new
struct pw_main_loop * pw_main_loop_new(const struct spa_dict *props)
Create a new main loop.
Definition main-loop.c:63
pw_main_loop_get_loop
struct pw_loop * pw_main_loop_get_loop(struct pw_main_loop *loop)
Get the loop implementation.
Definition main-loop.c:96
pw_init
void pw_init(int *argc, char **argv[])
Initialize PipeWire.
Definition pipewire.c:488
pw_proxy_destroy
void pw_proxy_destroy(struct pw_proxy *proxy)
destroy a proxy
Definition proxy.c:209
PW_VERSION_REGISTRY_EVENTS
#define PW_VERSION_REGISTRY_EVENTS
Definition core.h:535
pw_registry_add_listener
PW_API_REGISTRY_IMPL int pw_registry_add_listener(struct pw_registry *registry, struct spa_hook *listener, const struct pw_registry_events *events, void *data)
Registry.
Definition core.h:613
pw_registry_bind
PW_API_REGISTRY_IMPL void * pw_registry_bind(struct pw_registry *registry, uint32_t id, const char *type, uint32_t version, size_t user_data_size)
Bind to a global object.
Definition core.h:625
spa_dict_for_each
#define spa_dict_for_each(item, dict)
Definition dict.h:71
spa_zero
#define spa_zero(x)
Definition defs.h:508
pipewire.h
pipewire/pipewire.h
pw_client_events
Client events.
Definition client.h:82
pw_client_info
The client information.
Definition client.h:52
pw_client
pw_context
pw_core
pw_main_loop
A main loop object.
pw_proxy
pw_registry_events
Registry events.
Definition core.h:533
pw_registry
spa_dict_item
Definition dict.h:41
spa_dict_item::key
const char * key
Definition dict.h:42
spa_dict_item::value
const char * value
Definition dict.h:43
spa_dict
Definition dict.h:51
spa_hook
A hook, contains the structure with functions and the data passed to the functions.
Definition hook.h:427