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
  45#define MAX_PID 0x1fff
  46
  47struct dvb_demux_filter {
  48        struct dmx_section_filter filter;
  49        u8 maskandmode[DMX_MAX_FILTER_SIZE];
  50        u8 maskandnotmode[DMX_MAX_FILTER_SIZE];
  51        int doneq;
  52
  53        struct dvb_demux_filter *next;
  54        struct dvb_demux_feed *feed;
  55        int index;
  56        int state;
  57        int type;
  58
  59        u16 hw_handle;
  60        struct timer_list timer;
  61};
  62
  63#define DMX_FEED_ENTRY(pos) list_entry(pos, struct dvb_demux_feed, list_head)
  64
  65struct dvb_demux_feed {
  66        union {
  67                struct dmx_ts_feed ts;
  68                struct dmx_section_feed sec;
  69        } feed;
  70
  71        union {
  72                dmx_ts_cb ts;
  73                dmx_section_cb sec;
  74        } cb;
  75
  76        struct dvb_demux *demux;
  77        void *priv;
  78        int type;
  79        int state;
  80        u16 pid;
  81        u8 *buffer;
  82        int buffer_size;
  83
  84        struct timespec timeout;
  85        struct dvb_demux_filter *filter;
  86
  87        int ts_type;
  88        enum dmx_ts_pes pes_type;
  89
  90        int cc;
  91        int pusi_seen;          /* prevents feeding of garbage from previous section */
  92
  93        u16 peslen;
  94
  95        struct list_head list_head;
  96        unsigned int index;     /* a unique index for each feed (can be used as hardware pid filter index) */
  97};
  98
  99struct dvb_demux {
 100        struct dmx_demux dmx;
 101        void *priv;
 102        int filternum;
 103        int feednum;
 104        int (*start_feed)(struct dvb_demux_feed *feed);
 105        int (*stop_feed)(struct dvb_demux_feed *feed);
 106        int (*write_to_decoder)(struct dvb_demux_feed *feed,
 107                                 const u8 *buf, size_t len);
 108        u32 (*check_crc32)(struct dvb_demux_feed *feed,
 109                            const u8 *buf, size_t len);
 110        void (*memcopy)(struct dvb_demux_feed *feed, u8 *dst,
 111                         const u8 *src, size_t len);
 112
 113        int users;
 114#define MAX_DVB_DEMUX_USERS 10
 115        struct dvb_demux_filter *filter;
 116        struct dvb_demux_feed *feed;
 117
 118        struct list_head frontend_list;
 119
 120        struct dvb_demux_feed *pesfilter[DMX_TS_PES_OTHER];
 121        u16 pids[DMX_TS_PES_OTHER];
 122        int playing;
 123        int recording;
 124
 125#define DMX_MAX_PID 0x2000
 126        struct list_head feed_list;
 127        u8 tsbuf[204];
 128        int tsbufp;
 129
 130        struct mutex mutex;
 131        spinlock_t lock;
 132
 133        uint8_t *cnt_storage; /* for TS continuity check */
 134};
 135
 136int dvb_dmx_init(struct dvb_demux *dvbdemux);
 137void dvb_dmx_release(struct dvb_demux *dvbdemux);
 138void dvb_dmx_swfilter_packets(struct dvb_demux *dvbdmx, const u8 *buf,
 139                              size_t count);
 140void dvb_dmx_swfilter(struct dvb_demux *demux, const u8 *buf, size_t count);
 141void dvb_dmx_swfilter_204(struct dvb_demux *demux, const u8 *buf,
 142                          size_t count);
 143
 144#endif /* _DVB_DEMUX_H_ */
 145