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media: dmxdev.h: add kernel-doc markups for data types and functions 

Despite being used by DVB drivers, this header was not documented.

Document it.

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
This commit is contained in:
Mauro Carvalho Chehab 2017-09-20 12:10:48 -04:00
parent 6128a68dbc
commit e7446385fe
1 changed files with 88 additions and 2 deletions
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90
drivers/media/dvb-core/dmxdev.h
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@ -36,12 +36,33 @@
#include "demux.h"
#include "dvb_ringbuffer.h"
/**
* enum dmxdev_type - type of demux filter type.
*
* @DMXDEV_TYPE_NONE: no filter set.
* @DMXDEV_TYPE_SEC: section filter.
* @DMXDEV_TYPE_PES: Program Elementary Stream (PES) filter.
*/
enum dmxdev_type {
DMXDEV_TYPE_NONE,
DMXDEV_TYPE_SEC,
DMXDEV_TYPE_PES,
};
/**
* enum dmxdev_state - state machine for the dmxdev.
*
* @DMXDEV_STATE_FREE: indicates that the filter is freed.
* @DMXDEV_STATE_ALLOCATED: indicates that the filter was allocated
* to be used.
* @DMXDEV_STATE_SET: indicates that the filter parameters are set.
* @DMXDEV_STATE_GO: indicates that the filter is running.
* @DMXDEV_STATE_DONE: indicates that a packet was already filtered
* and the filter is now disabled.
* Set only if %DMX_ONESHOT. See
* &dmx_sct_filter_params.
* @DMXDEV_STATE_TIMEDOUT: Indicates a timeout condition.
*/
enum dmxdev_state {
DMXDEV_STATE_FREE,
DMXDEV_STATE_ALLOCATED,
@ -51,12 +72,49 @@ enum dmxdev_state {
DMXDEV_STATE_TIMEDOUT
};
/**
* struct dmxdev_feed - digital TV dmxdev feed
*
* @pid: Program ID to be filtered
* @ts: pointer to &struct dmx_ts_feed
* @next: &struct list_head pointing to the next feed.
*/
struct dmxdev_feed {
u16 pid;
struct dmx_ts_feed *ts;
struct list_head next;
};
/**
* struct dmxdev_filter - digital TV dmxdev filter
*
* @filter: a dmxdev filter. Currently used only for section filter:
* if the filter is Section, it contains a
* &struct dmx_section_filter @sec pointer.
* @feed: a dmxdev feed. Depending on the feed type, it can be:
* for TS feed: a &struct list_head @ts list of TS and PES
* feeds;
* for section feed: a &struct dmx_section_feed @sec pointer.
* @params: dmxdev filter parameters. Depending on the feed type, it
* can be:
* for section filter: a &struct dmx_sct_filter_params @sec
* embedded struct;
* for a TS filter: a &struct dmx_pes_filter_params @pes
* embedded struct.
* @type: type of the dmxdev filter, as defined by &enum dmxdev_type.
* @state: state of the dmxdev filter, as defined by &enum dmxdev_state.
* @dev: pointer to &struct dmxdev.
* @buffer: an embedded &struct dvb_ringbuffer buffer.
* @mutex: protects the access to &struct dmxdev_filter.
* @timer: &struct timer_list embedded timer, used to check for
* feed timeouts.
* Only for section filter.
* @todo: index for the @secheader.
* Only for section filter.
* @secheader: buffer cache to parse the section header.
* Only for section filter.
*/
struct dmxdev_filter {
union {
struct dmx_section_filter *sec;
@ -86,7 +144,23 @@ struct dmxdev_filter {
u8 secheader[3];
};
/**
* struct dmxdev - Describes a digital TV demux device.
*
* @dvbdev: pointer to &struct dvb_device associated with
* the demux device node.
* @dvr_dvbdev: pointer to &struct dvb_device associated with
* the dvr device node.
* @filter: pointer to &struct dmxdev_filter.
* @demux: pointer to &struct dmx_demux.
* @filternum: number of filters.
* @capabilities: demux capabilities as defined by &enum dmx_demux_caps.
* @exit: flag to indicate that the demux is being released.
* @dvr_orig_fe: pointer to &struct dmx_frontend.
* @dvr_buffer: embedded &struct dvb_ringbuffer for DVB output.
* @mutex: protects the usage of this structure.
* @lock: protects access to &dmxdev->filter->data.
*/
struct dmxdev {
struct dvb_device *dvbdev;
struct dvb_device *dvr_dvbdev;
@ -108,8 +182,20 @@ struct dmxdev {
spinlock_t lock;
};
/**
* dvb_dmxdev_init - initializes a digital TV demux and registers both demux
* and DVR devices.
*
* @dmxdev: pointer to &struct dmxdev.
* @adap: pointer to &struct dvb_adapter.
*/
int dvb_dmxdev_init(struct dmxdev *dmxdev, struct dvb_adapter *adap);
int dvb_dmxdev_init(struct dmxdev *dmxdev, struct dvb_adapter *);
/**
* dvb_dmxdev_release - releases a digital TV demux and unregisters it.
*
* @dmxdev: pointer to &struct dmxdev.
*/
void dvb_dmxdev_release(struct dmxdev *dmxdev);
#endif /* _DMXDEV_H_ */