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media: dvb_demux.h: document structs defined on it 

There are three structs defined inside dvb_demux.h. None
of them are currently documented.

Add documentation for them.

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
This commit is contained in:
Mauro Carvalho Chehab 2017-09-19 19:11:22 -04:00
parent 06133bdcbd
commit 198688cdc1
2 changed files with 50 additions and 10 deletions
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1
drivers/media/dvb-core/dvb_demux.c
View File

@ -367,6 +367,7 @@ static inline void dvb_dmx_swfilter_packet_type(struct dvb_demux_feed *feed,
else
feed->cb.ts(buf, 188, NULL, 0, &feed->feed.ts);
}
/* Used only on full-featured devices */
if (feed->ts_type & TS_DECODER)
if (feed->demux->write_to_decoder)
feed->demux->write_to_decoder(feed, buf, 188);

59
drivers/media/dvb-core/dvb_demux.h
View File

@ -95,16 +95,16 @@ struct dvb_demux_filter {
* struct dvb_demux_feed - describes a DVB field
*
* @feed: a digital TV feed. It can either be a TS or a section feed:
* - if the feed is TS, it contains &struct dvb_ts_feed;
* - if the feed is section, it contains
* &struct dmx_section_feed.
* if the feed is TS, it contains &struct dvb_ts_feed @ts;
* if the feed is section, it contains
* &struct dmx_section_feed @sec.
* @cb: digital TV callbacks. depending on the feed type, it can be:
* - if the feed is TS, it contains a dmx_ts_cb() callback;
* - if the feed is section, it contains a dmx_section_cb()
* callback.
* if the feed is TS, it contains a dmx_ts_cb() @ts callback;
* if the feed is section, it contains a dmx_section_cb() @sec
* callback.
*
* @demux: pointer to &struct dvb_demux.
* @priv: private data for the filter handling routine.
* @priv: private data that can optionally be used by a DVB driver.
* @type: type of the filter, as defined by &enum dvb_dmx_filter_type.
* @state: state of the filter as defined by &enum dvb_dmx_state.
* @pid: PID to be filtered.
@ -119,7 +119,6 @@ struct dvb_demux_filter {
* @list_head: head for the list of digital TV demux feeds.
* @index: a unique index for each feed. Can be used as hardware
* pid filter index.
*
*/
struct dvb_demux_feed {
union {
@ -153,6 +152,44 @@ struct dvb_demux_feed {
unsigned int index;
};
/**
* struct dvb_demux - represents a digital TV demux
* @dmx: embedded &struct dmx_demux with demux capabilities
* and callbacks.
* @priv: private data that can optionally be used by
* a DVB driver.
* @filternum: maximum amount of DVB filters.
* @feednum: maximum amount of DVB feeds.
* @start_feed: callback routine to be called in order to start
* a DVB feed.
* @stop_feed: callback routine to be called in order to stop
* a DVB feed.
* @write_to_decoder: callback routine to be called if the feed is TS and
* it is routed to an A/V decoder, when a new TS packet
* is received.
* Used only on av7110-av.c.
* @check_crc32: callback routine to check CRC. If not initialized,
* dvb_demux will use an internal one.
* @memcopy: callback routine to memcopy received data.
* If not initialized, dvb_demux will default to memcpy().
* @users: counter for the number of demux opened file descriptors.
* Currently, it is limited to 10 users.
* @filter: pointer to &struct dvb_demux_filter.
* @feed: pointer to &struct dvb_demux_feed.
* @frontend_list: &struct list_head with frontends used by the demux.
* @pesfilter: array of &struct dvb_demux_feed with the PES types
* that will be filtered.
* @pids: list of filtered program IDs.
* @feed_list: &struct list_head with feeds.
* @tsbuf: temporary buffer used internally to store TS packets.
* @tsbufp: temporary buffer index used internally.
* @mutex: pointer to &struct mutex used to protect feed set
* logic.
* @lock: pointer to &spinlock_t, used to protect buffer handling.
* @cnt_storage: buffer used for TS/TEI continuity check.
* @speed_last_time: &ktime_t used for TS speed check.
* @speed_pkts_cnt: packets count used for TS speed check.
*/
struct dvb_demux {
struct dmx_demux dmx;
void *priv;
@ -176,8 +213,6 @@ struct dvb_demux {
struct dvb_demux_feed *pesfilter[DMX_PES_OTHER];
u16 pids[DMX_PES_OTHER];
int playing;
int recording;
#define DMX_MAX_PID 0x2000
struct list_head feed_list;
@ -191,6 +226,10 @@ struct dvb_demux {
ktime_t speed_last_time; /* for TS speed check */
uint32_t speed_pkts_cnt; /* for TS speed check */
/* private: used only on av7110 */
int playing;
int recording;
};
int dvb_dmx_init(struct dvb_demux *dvbdemux);