@@ -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_ */
Despite being used by DVB drivers, this header was not documented. Document it. Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com> --- drivers/media/dvb-core/dmxdev.h | 90 ++++++++++++++++++++++++++++++++++++++++- 1 file changed, 88 insertions(+), 2 deletions(-)