LXR linux/drivers/media/dvb/dvb-core/dvb

   1/*
   2 * dvb_demux.h: DVB kernel demux API
   3 *
   4 * Copyright (C) 2000-2001 Marcus Metzler & Ralph Metzler
   5 *                         for convergence integrated media GmbH
   6 *
   7 * This program is free software; you can redistribute it and/or
   8 * modify it under the terms of the GNU Lesser General Public License
   9 * as published by the Free Software Foundation; either version 2.1
  10 * of the License, or (at your option) any later version.
  11 *
  12 * This program is distributed in the hope that it will be useful,
  13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 * GNU General Public License for more details.
  16 *
  17 * You should have received a copy of the GNU Lesser General Public License
  18 * along with this program; if not, write to the Free Software
  19 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  20 *
  21 */
  22
  23#ifndef _DVB_DEMUX_H_
  24#define _DVB_DEMUX_H_
  25
  26#include <linux/time.h>
  27#include <linux/timer.h>
  28#include <linux/spinlock.h>
  29#include <linux/mutex.h>
  30
  31#include "demux.h"
  32
  33#define DMX_TYPE_TS  0
  34#define DMX_TYPE_SEC 1
  35#define DMX_TYPE_PES 2
  36
  37#define DMX_STATE_FREE      0
  38#define DMX_STATE_ALLOCATED 1
  39#define DMX_STATE_SET       2
  40#define DMX_STATE_READY     3
  41#define DMX_STATE_GO        4
  42
  43#define DVB_DEMUX_MASK_MAX 18
  44
  45struct dvb_demux_filter {
  46        struct dmx_section_filter filter;
  47        u8 maskandmode[DMX_MAX_FILTER_SIZE];
  48        u8 maskandnotmode[DMX_MAX_FILTER_SIZE];
  49        int doneq;
  50
  51        struct dvb_demux_filter *next;
  52        struct dvb_demux_feed *feed;
  53        int index;
  54        int state;
  55        int type;
  56
  57        u16 hw_handle;
  58        struct timer_list timer;
  59};
  60
  61#define DMX_FEED_ENTRY(pos) list_entry(pos, struct dvb_demux_feed, list_head)
  62
  63struct dvb_demux_feed {
  64        union {
  65                struct dmx_ts_feed ts;
  66                struct dmx_section_feed sec;
  67        } feed;
  68
  69        union {
  70                dmx_ts_cb ts;
  71                dmx_section_cb sec;
  72        } cb;
  73
  74        struct dvb_demux *demux;
  75        void *priv;
  76        int type;
  77        int state;
  78        u16 pid;
  79        u8 *buffer;
  80        int buffer_size;
  81
  82        struct timespec timeout;
  83        struct dvb_demux_filter *filter;
  84
  85        int ts_type;
  86        enum dmx_ts_pes pes_type;
  87
  88        int cc;
  89        int pusi_seen;          /* prevents feeding of garbage from previous section */
  90
  91        u16 peslen;
  92
  93        struct list_head list_head;
  94        unsigned int index;     /* a unique index for each feed (can be used as hardware pid filter index) */
  95};
  96
  97struct dvb_demux {
  98        struct dmx_demux dmx;
  99        void *priv;
 100        int filternum;
 101        int feednum;
 102        int (*start_feed)(struct dvb_demux_feed *feed);
 103        int (*stop_feed)(struct dvb_demux_feed *feed);
 104        int (*write_to_decoder)(struct dvb_demux_feed *feed,
 105                                 const u8 *buf, size_t len);
 106        u32 (*check_crc32)(struct dvb_demux_feed *feed,
 107                            const u8 *buf, size_t len);
 108        void (*memcopy)(struct dvb_demux_feed *feed, u8 *dst,
 109                         const u8 *src, size_t len);
 110
 111        int users;
 112#define MAX_DVB_DEMUX_USERS 10
 113        struct dvb_demux_filter *filter;
 114        struct dvb_demux_feed *feed;
 115
 116        struct list_head frontend_list;
 117
 118        struct dvb_demux_feed *pesfilter[DMX_TS_PES_OTHER];
 119        u16 pids[DMX_TS_PES_OTHER];
 120        int playing;
 121        int recording;
 122
 123#define DMX_MAX_PID 0x2000
 124        struct list_head feed_list;
 125        u8 tsbuf[204];
 126        int tsbufp;
 127
 128        struct mutex mutex;
 129        spinlock_t lock;
 130};
 131
 132int dvb_dmx_init(struct dvb_demux *dvbdemux);
 133void dvb_dmx_release(struct dvb_demux *dvbdemux);
 134void dvb_dmx_swfilter_packets(struct dvb_demux *dvbdmx, const u8 *buf,
 135                              size_t count);
 136void dvb_dmx_swfilter(struct dvb_demux *demux, const u8 *buf, size_t count);
 137void dvb_dmx_swfilter_204(struct dvb_demux *demux, const u8 *buf,
 138                          size_t count);
 139
 140#endif /* _DVB_DEMUX_H_ */
 141