struct media

struct media_entity
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Name

struct media_entity — A media entity graph object.

Synopsis

struct media_entity {
  struct media_gobj graph_obj;
  const char * name;
  enum media_entity_type obj_type;
  u32 function;
  unsigned long flags;
  u16 num_pads;
  u16 num_links;
  u16 num_backlinks;
  int internal_idx;
  struct media_pad * pads;
  struct list_head links;
  const struct media_entity_operations * ops;
  int stream_count;
  int use_count;
  struct media_pipeline * pipe;
  union info;
};

Members

graph_obj: Embedded structure containing the media object common data.
name: Entity name.
obj_type: Type of the object that implements the media_entity.
function: Entity main function, as defined in uapi/media.h (MEDIA_ENT_F_*)
flags: Entity flags, as defined in uapi/media.h (MEDIA_ENT_FL_*)
num_pads: Number of sink and source pads.
num_links: Total number of links, forward and back, enabled and disabled.
num_backlinks: Number of backlinks
internal_idx: An unique internal entity specific number. The numbers are re-used if entities are unregistered or registered again.
pads: Pads array with the size defined by num_pads.
links: List of data links.
ops: Entity operations.
stream_count: Stream count for the entity.
use_count: Use count for the entity.
pipe: Pipeline this entity belongs to.
info: Union with devnode information. Kept just for backward compatibility.

NOTE

stream_count and use_count reference counts must never be negative, but are signed integers on purpose: a simple WARN_ON(<0) check can be used to detect reference count bugs that would make them negative.