PipeWire  0.3.59
filter.h File Reference

pipewire/filter.h More...

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Data Structures

struct  pw_filter_events
 Events for a filter. More...
 

Macros

#define PW_VERSION_FILTER_EVENTS   1
 

Enumerations

enum  pw_filter_state {
  PW_FILTER_STATE_ERROR = -1 , PW_FILTER_STATE_UNCONNECTED = 0 , PW_FILTER_STATE_CONNECTING = 1 , PW_FILTER_STATE_PAUSED = 2 ,
  PW_FILTER_STATE_STREAMING = 3
}
 The state of a filter
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enum  pw_filter_flags {
  PW_FILTER_FLAG_NONE = 0 , PW_FILTER_FLAG_INACTIVE = (1 << 0) , PW_FILTER_FLAG_DRIVER = (1 << 1) , PW_FILTER_FLAG_RT_PROCESS = (1 << 2) ,
  PW_FILTER_FLAG_CUSTOM_LATENCY = (1 << 3)
}
 Extra flags that can be used in pw_filter_connect()
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enum  pw_filter_port_flags { PW_FILTER_PORT_FLAG_NONE = 0 , PW_FILTER_PORT_FLAG_MAP_BUFFERS = (1 << 0) , PW_FILTER_PORT_FLAG_ALLOC_BUFFERS = (1 << 1) }
 

Functions

const char * pw_filter_state_as_string (enum pw_filter_state state)
 Convert a filter state to a readable string
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struct pw_filterpw_filter_new (struct pw_core *core, const char *name, struct pw_properties *props)
 Create a new unconneced Filter. More...
 
struct pw_filterpw_filter_new_simple (struct pw_loop *loop, const char *name, struct pw_properties *props, const struct pw_filter_events *events, void *data)
 
void pw_filter_destroy (struct pw_filter *filter)
 Destroy a filter
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void pw_filter_add_listener (struct pw_filter *filter, struct spa_hook *listener, const struct pw_filter_events *events, void *data)
 
enum pw_filter_state pw_filter_get_state (struct pw_filter *filter, const char **error)
 
const char * pw_filter_get_name (struct pw_filter *filter)
 
struct pw_corepw_filter_get_core (struct pw_filter *filter)
 
int pw_filter_connect (struct pw_filter *filter, enum pw_filter_flags flags, const struct spa_pod **params, uint32_t n_params)
 Connect a filter for processing. More...
 
uint32_t pw_filter_get_node_id (struct pw_filter *filter)
 Get the node ID of the filter. More...
 
int pw_filter_disconnect (struct pw_filter *filter)
 Disconnect filter
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void * pw_filter_add_port (struct pw_filter *filter, enum pw_direction direction, enum pw_filter_port_flags flags, size_t port_data_size, struct pw_properties *props, const struct spa_pod **params, uint32_t n_params)
 add a port to the filter, returns user data of port_data_size. More...
 
int pw_filter_remove_port (void *port_data)
 remove a port from the filter More...
 
const struct pw_propertiespw_filter_get_properties (struct pw_filter *filter, void *port_data)
 get properties, port_data of NULL will give global properties More...
 
int pw_filter_update_properties (struct pw_filter *filter, void *port_data, const struct spa_dict *dict)
 Update properties, use NULL port_data for global filter properties. More...
 
int pw_filter_set_error (struct pw_filter *filter, int res, const char *error,...) 1(3
 Set the filter in error state. More...
 
int int pw_filter_update_params (struct pw_filter *filter, void *port_data, const struct spa_pod **params, uint32_t n_params)
 Update params, use NULL port_data for global filter params. More...
 
int pw_filter_get_time (struct pw_filter *filter, struct pw_time *time)
 Query the time on the filter, deprecated, use the spa_io_position in the process() method for timing information. More...
 
struct pw_bufferpw_filter_dequeue_buffer (void *port_data)
 Get a buffer that can be filled for output ports or consumed for input ports. More...
 
int pw_filter_queue_buffer (void *port_data, struct pw_buffer *buffer)
 Submit a buffer for playback or recycle a buffer for capture. More...
 
void * pw_filter_get_dsp_buffer (void *port_data, uint32_t n_samples)
 Get a data pointer to the buffer data. More...
 
int pw_filter_set_active (struct pw_filter *filter, bool active)
 Activate or deactivate the filter
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int pw_filter_flush (struct pw_filter *filter, bool drain)
 Flush a filter. More...
 

Detailed Description