struct dmx_section

struct dmx_section_feed
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Name

struct dmx_section_feed — Structure that contains a section feed filter

Synopsis

struct dmx_section_feed {
  int is_filtering;
  struct dmx_demux * parent;
  void * priv;
  int check_crc;
  int (* set) (struct dmx_section_feed *feed,u16 pid,size_t circular_buffer_size,int check_crc);
  int (* allocate_filter) (struct dmx_section_feed *feed,struct dmx_section_filter **filter);
  int (* release_filter) (struct dmx_section_feed *feed,struct dmx_section_filter *filter);
  int (* start_filtering) (struct dmx_section_feed *feed);
  int (* stop_filtering) (struct dmx_section_feed *feed);
};

Members

is_filtering: Set to non-zero when filtering in progress
parent: pointer to struct dmx_demux
priv: pointer to private data of the API client
check_crc: If non-zero, check the CRC values of filtered sections.
set: sets the section filter
allocate_filter: This function is used to allocate a section filter on the demux. It should only be called when no filtering is in progress on this section feed. If a filter cannot be allocated, the function fails with -ENOSPC.
release_filter: This function releases all the resources of a previously allocated section filter. The function should not be called while filtering is in progress on this section feed. After calling this function, the caller should not try to dereference the filter pointer.
start_filtering: starts section filtering
stop_filtering: stops section filtering

Description

A TS feed is typically mapped to a hardware PID filter on the demux chip. Using this API, the client can set the filtering properties to start/stop filtering TS packets on a particular TS feed.