context.c File Reference

Data Structures
struct	object_entry

Macros
#define	NAME   "context"
#define	DEFAULT_CLOCK_RATE   48000u
#define	DEFAULT_CLOCK_QUANTUM   1024u
#define	DEFAULT_CLOCK_MIN_QUANTUM   32u
#define	DEFAULT_CLOCK_MAX_QUANTUM   8192u
#define	DEFAULT_CLOCK_POWER_OF_TWO_QUANTUM   true
#define	DEFAULT_VIDEO_WIDTH   640
#define	DEFAULT_VIDEO_HEIGHT   480
#define	DEFAULT_VIDEO_RATE_NUM   25u
#define	DEFAULT_VIDEO_RATE_DENOM   1u
#define	DEFAULT_LINK_MAX_BUFFERS   64u
#define	DEFAULT_MEM_WARN_MLOCK   false
#define	DEFAULT_MEM_ALLOW_MLOCK   true

Functions
struct pw_context *	pw_context_new (struct pw_loop *main_loop, struct pw_properties *properties, size_t user_data_size)
	Create a new context object. More...
void	pw_context_destroy (struct pw_context *context)
	Destroy a context object. More...
void *	pw_context_get_user_data (struct pw_context *context)
	Get the context user data. More...
void	pw_context_add_listener (struct pw_context *context, struct spa_hook *listener, const struct pw_context_events *events, void *data)
	Add a new event listener to a context. More...
const struct spa_support *	pw_context_get_support (struct pw_context *context, uint32_t *n_support)
	Get the context support objects. More...
struct pw_loop *	pw_context_get_main_loop (struct pw_context *context)
	get the context main loop More...
struct pw_work_queue *	pw_context_get_work_queue (struct pw_context *context)
	Get the work queue from the context: Since 0.3.26. More...
const struct pw_properties *	pw_context_get_properties (struct pw_context *context)
	Get the context properties. More...
const char *	pw_context_get_conf_section (struct pw_context *context, const char *section)
	Get a config section for this context. More...
int	pw_context_update_properties (struct pw_context *context, const struct spa_dict *dict)
	Update context properties. More...
int	pw_context_for_each_global (struct pw_context *context, int(*callback)(void *data, struct pw_global *global), void *data)
	Iterate the globals of the context. More...
struct pw_global *	pw_context_find_global (struct pw_context *context, uint32_t id)
	Find a context global by id. More...
struct pw_impl_port *	pw_context_find_port (struct pw_context *context, struct pw_impl_port *other_port, uint32_t id, struct pw_properties *props, uint32_t n_format_filters, struct spa_pod **format_filters, char **error)
	Find a port to link with. More...
int	pw_context_debug_port_params (struct pw_context *this, struct spa_node *node, enum spa_direction direction, uint32_t port_id, uint32_t id, int err, const char *debug,...)
int	pw_context_find_format (struct pw_context *context, struct pw_impl_port *output, struct pw_impl_port *input, struct pw_properties *props, uint32_t n_format_filters, struct spa_pod **format_filters, struct spa_pod **format, struct spa_pod_builder *builder, char **error)
	Find a common format between two ports. More...
int	pw_context_recalc_graph (struct pw_context *context, const char *reason)
int	pw_context_add_spa_lib (struct pw_context *context, const char *factory_regexp, const char *lib)
	add a spa library for the given factory_name regex More...
const char *	pw_context_find_spa_lib (struct pw_context *context, const char *factory_name)
	find the library name for a spa factory More...
struct spa_handle *	pw_context_load_spa_handle (struct pw_context *context, const char *factory_name, const struct spa_dict *info)
int	pw_context_register_export_type (struct pw_context *context, struct pw_export_type *type)
	register a type that can be exported on a context_proxy. More...
const struct pw_export_type *	pw_context_find_export_type (struct pw_context *context, const char *type)
	find information about registered export type More...
int	pw_context_set_object (struct pw_context *context, const char *type, void *value)
	add an object to the context More...
void *	pw_context_get_object (struct pw_context *context, const char *type)
	get an object from the context More...

Macro Definition Documentation

DEFAULT_CLOCK_MAX_QUANTUM

#define DEFAULT_CLOCK_MAX_QUANTUM   8192u

DEFAULT_CLOCK_MIN_QUANTUM

#define DEFAULT_CLOCK_MIN_QUANTUM   32u

DEFAULT_CLOCK_POWER_OF_TWO_QUANTUM

#define DEFAULT_CLOCK_POWER_OF_TWO_QUANTUM   true

DEFAULT_CLOCK_QUANTUM

#define DEFAULT_CLOCK_QUANTUM   1024u

DEFAULT_CLOCK_RATE

#define DEFAULT_CLOCK_RATE   48000u

DEFAULT_LINK_MAX_BUFFERS

#define DEFAULT_LINK_MAX_BUFFERS   64u

DEFAULT_MEM_ALLOW_MLOCK

#define DEFAULT_MEM_ALLOW_MLOCK   true

DEFAULT_MEM_WARN_MLOCK

#define DEFAULT_MEM_WARN_MLOCK   false

DEFAULT_VIDEO_HEIGHT

#define DEFAULT_VIDEO_HEIGHT   480

DEFAULT_VIDEO_RATE_DENOM

#define DEFAULT_VIDEO_RATE_DENOM   1u

DEFAULT_VIDEO_RATE_NUM

#define DEFAULT_VIDEO_RATE_NUM   25u

DEFAULT_VIDEO_WIDTH

#define DEFAULT_VIDEO_WIDTH   640

NAME

#define NAME   "context"

Function Documentation

pw_context_debug_port_params()

int pw_context_debug_port_params	(	struct pw_context *	this,
		struct spa_node *	node,
		enum spa_direction	direction,
		uint32_t	port_id,
		uint32_t	id,
		int	err,
		const char *	debug,
			...
	)

References pw_log_error, spa_debug_type_find_name(), SPA_LOG_LEVEL_ERROR, spa_node_port_enum_params_sync(), spa_pod_builder_init(), spa_strerror, spa_type_param, and spa_pod_builder::state.

pw_context_find_format()

int pw_context_find_format	(	struct pw_context *	context,
		struct pw_impl_port *	output,
		struct pw_impl_port *	input,
		struct pw_properties *	props,
		uint32_t	n_format_filters,
		struct spa_pod **	format_filters,
		struct spa_pod **	format,
		struct spa_pod_builder *	builder,
		char **	error
	)

Find a common format between two ports.

Parameters

	context	a context object
	output	an output port
	input	an input port
	props	extra properties
	n_format_filters	number of format filters
	format_filters	array of format filters
[out]	format	the common format between the ports
	builder	builder to use for processing
[out]	error	an error when something is wrong

Returns

a common format of NULL on error

Find a common format between the given ports. The format will be restricted to a subset given with the format filters.

References NAME, PW_IMPL_PORT_STATE_CONFIGURE, pw_log_debug, PW_NODE_STATE_IDLE, spa_aprintf, SPA_LOG_LEVEL_DEBUG, spa_node_port_enum_params_sync(), SPA_PARAM_EnumFormat, SPA_PARAM_Format, spa_pod_builder_init(), and spa_strerror.

pw_context_find_port()

struct pw_impl_port* pw_context_find_port	(	struct pw_context *	context,
		struct pw_impl_port *	other_port,
		uint32_t	id,
		struct pw_properties *	props,
		uint32_t	n_format_filters,
		struct spa_pod **	format_filters,
		char **	error
	)

Find a port to link with.

Parameters

	context	a context
	other_port	a port to find a link with
	id	the id of a port or PW_ID_ANY
	props	extra properties
	n_format_filters	number of filters
	format_filters	array of format filters
[out]	error	an error when something is wrong

Returns

a port that can be used to link to otherport or NULL on error

References NAME, PW_ID_ANY, pw_log_debug, and spa_list_for_each.

pw_context_recalc_graph()

int pw_context_recalc_graph	(	struct pw_context *	context,
		const char *	reason
	)

References impl::context, NAME, pw_log_info, and SPA_CONTAINER_OF.

Referenced by pw_impl_node_set_active().