drivers/media/dvb-core/dvb_demux.h

   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
  47 #define SPEED_PKTS_INTERVAL 50000
  48
  49 struct dvb_demux_filter {
  50         struct dmx_section_filter filter;
  51         u8 maskandmode[DMX_MAX_FILTER_SIZE];
  52         u8 maskandnotmode[DMX_MAX_FILTER_SIZE];
  53         int doneq;
  54
  55         struct dvb_demux_filter *next;
  56         struct dvb_demux_feed *feed;
  57         int index;
  58         int state;
  59         int type;
  60
  61         u16 hw_handle;
  62         struct timer_list timer;
  63 };
  64
  65 #define DMX_FEED_ENTRY(pos) list_entry(pos, struct dvb_demux_feed, list_head)
  66
  67 struct dvb_demux_feed {
  68         union {
  69                 struct dmx_ts_feed ts;
  70                 struct dmx_section_feed sec;
  71         } feed;
  72
  73         union {
  74                 dmx_ts_cb ts;
  75                 dmx_section_cb sec;
  76         } cb;
  77
  78         struct dvb_demux *demux;
  79         void *priv;
  80         int type;
  81         int state;
  82         u16 pid;
  83         u8 *buffer;
  84         int buffer_size;
  85
  86         ktime_t timeout;
  87         struct dvb_demux_filter *filter;
  88
  89         int ts_type;
  90         enum dmx_ts_pes pes_type;
  91
  92         int cc;
  93         int pusi_seen;          /* prevents feeding of garbage from previous section */
  94
  95         u16 peslen;
  96
  97         struct list_head list_head;
  98         unsigned int index;     /* a unique index for each feed (can be used as hardware pid filter index) */
  99 };
 100
 101 struct dvb_demux {
 102         struct dmx_demux dmx;
 103         void *priv;
 104         int filternum;
 105         int feednum;
 106         int (*start_feed)(struct dvb_demux_feed *feed);
 107         int (*stop_feed)(struct dvb_demux_feed *feed);
 108         int (*write_to_decoder)(struct dvb_demux_feed *feed,
 109                                  const u8 *buf, size_t len);
 110         u32 (*check_crc32)(struct dvb_demux_feed *feed,
 111                             const u8 *buf, size_t len);
 112         void (*memcopy)(struct dvb_demux_feed *feed, u8 *dst,
 113                          const u8 *src, size_t len);
 114
 115         int users;
 116 #define MAX_DVB_DEMUX_USERS 10
 117         struct dvb_demux_filter *filter;
 118         struct dvb_demux_feed *feed;
 119
 120         struct list_head frontend_list;
 121
 122         struct dvb_demux_feed *pesfilter[DMX_PES_OTHER];
 123         u16 pids[DMX_PES_OTHER];
 124         int playing;
 125         int recording;
 126
 127 #define DMX_MAX_PID 0x2000
 128         struct list_head feed_list;
 129         u8 tsbuf[204];
 130         int tsbufp;
 131
 132         struct mutex mutex;
 133         spinlock_t lock;
 134
 135         uint8_t *cnt_storage; /* for TS continuity check */
 136
 137         ktime_t speed_last_time; /* for TS speed check */
 138         uint32_t speed_pkts_cnt; /* for TS speed check */
 139 };
 140
 141 int dvb_dmx_init(struct dvb_demux *dvbdemux);
 142 void dvb_dmx_release(struct dvb_demux *dvbdemux);
 143 void dvb_dmx_swfilter_packets(struct dvb_demux *dvbdmx, const u8 *buf,
 144                               size_t count);
 145 void dvb_dmx_swfilter(struct dvb_demux *demux, const u8 *buf, size_t count);
 146 void dvb_dmx_swfilter_204(struct dvb_demux *demux, const u8 *buf,
 147                           size_t count);
 148 void dvb_dmx_swfilter_raw(struct dvb_demux *demux, const u8 *buf,
 149                           size_t count);
 150
 151 #endif /* _DVB_DEMUX_H_ */