/*
* dmxdev . h
*
* Copyright ( C ) 2000 Ralph Metzler & Marcus Metzler
* for convergence integrated media GmbH
*
* This program is free software ; you can redistribute it and / or
* modify it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation ; either version 2 . 1
* of the License , or ( at your option ) any later version .
*
* This program is distributed in the hope that it will be useful ,
* but WITHOUT ANY WARRANTY ; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE . See the
* GNU General Public License for more details .
*
*/
#ifndef _DMXDEV_H_
#define _DMXDEV_H_
#include <linux/types.h>
#include <linux/spinlock.h>
#include <linux/time.h>
#include <linux/timer.h>
#include <linux/wait.h>
#include <linux/fs.h>
#include <linux/string.h>
#include <linux/mutex.h>
#include <linux/slab.h>
#include <linux/dvb/dmx.h>
#include <media/dvbdev.h>
#include <media/demux.h>
#include <media/dvb_ringbuffer.h>
#include <media/dvb_vb2.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,
DMXDEV_STATE_SET,
DMXDEV_STATE_GO,
DMXDEV_STATE_DONE,
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 union describing a dmxdev filter .
* Currently used only for section filters .
* @ filter . sec : a & struct dmx_section_filter pointer .
* For section filter only .
* @ feed : a union describing a dmxdev feed .
* Depending on the filter type , it can be either
* @ feed . ts or @ feed . sec .
* @ feed . ts : a & struct list_head list .
* For TS and PES feeds .
* @ feed . sec : a & struct dmx_section_feed pointer .
* For section feed only .
* @ params : a union describing dmxdev filter parameters .
* Depending on the filter type , it can be either
* @ params . sec or @ params . pes .
* @ params . sec : a & struct dmx_sct_filter_params embedded struct .
* For section filter only .
* @ params . pes : a & struct dmx_pes_filter_params embedded struct .
* For PES filter only .
* @ 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 .
* @ vb2_ctx : control struct for VB2 handler
* @ 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;
} filter;
union {
/* list of TS and PES feeds (struct dmxdev_feed) */
struct list_head ts;
struct dmx_section_feed *sec;
} feed;
union {
struct dmx_sct_filter_params sec;
struct dmx_pes_filter_params pes;
} params;
enum dmxdev_type type;
enum dmxdev_state state;
struct dmxdev *dev;
struct dvb_ringbuffer buffer;
struct dvb_vb2_ctx vb2_ctx;
struct mutex mutex;
/* only for sections */
struct timer_list timer;
int todo;
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 .
* @ may_do_mmap : flag used to indicate if the device may do mmap .
* @ 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 .
* @ dvr_vb2_ctx : control struct for VB2 handler
* @ 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;
struct dmxdev_filter *filter;
struct dmx_demux *demux;
int filternum;
int capabilities;
unsigned int may_do_mmap:1 ;
unsigned int exit :1 ;
#define DMXDEV_CAP_DUPLEX 1
struct dmx_frontend *dvr_orig_fe;
struct dvb_ringbuffer dvr_buffer;
#define DVR_BUFFER_SIZE (10 *188 *1024 )
struct dvb_vb2_ctx dvr_vb2_ctx;
struct mutex mutex;
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);
/**
* 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_ */
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