drivers/media/dvb/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
  24 #ifndef _DVB_DEMUX_H_
  25 #define _DVB_DEMUX_H_
  26
  27 #include <linux/time.h>
  28 #include <linux/timer.h>
  29 #include <linux/spinlock.h>
  30 #include <asm/semaphore.h>
  31
  32 #include "demux.h"
  33
  34 #define DMX_TYPE_TS  0
  35 #define DMX_TYPE_SEC 1
  36 #define DMX_TYPE_PES 2
  37
  38 #define DMX_STATE_FREE      0
  39 #define DMX_STATE_ALLOCATED 1
  40 #define DMX_STATE_SET       2
  41 #define DMX_STATE_READY     3
  42 #define DMX_STATE_GO        4
  43
  44 #define DVB_DEMUX_MASK_MAX 18
  45
  46 struct dvb_demux_filter {
  47         struct dmx_section_filter filter;
  48         u8 maskandmode    [DMX_MAX_FILTER_SIZE];
  49         u8 maskandnotmode [DMX_MAX_FILTER_SIZE];
  50         int doneq;
  51
  52         struct dvb_demux_filter *next;
  53         struct dvb_demux_feed *feed;
  54         int index;
  55         int state;
  56         int type;
  57         int pesto;
  58
  59         u16 handle;
  60         u16 hw_handle;
  61         struct timer_list timer;
  62         int ts_state;
  63 };
  64
  65
  66 #define DMX_FEED_ENTRY(pos) list_entry(pos, struct dvb_demux_feed, list_head)
  67
  68 struct dvb_demux_feed {
  69         union {
  70                 struct dmx_ts_feed ts;
  71                 struct dmx_section_feed sec;
  72         } feed;
  73
  74         union {
  75                 dmx_ts_cb ts;
  76                 dmx_section_cb sec;
  77         } cb;
  78
  79         struct dvb_demux *demux;
  80         void *priv;
  81         int type;
  82         int state;
  83         u16 pid;
  84         u8 *buffer;
  85         int buffer_size;
  86         int descramble;
  87
  88         struct timespec timeout;
  89         struct dvb_demux_filter *filter;
  90         int cb_length;
  91
  92         int ts_type;
  93         enum dmx_ts_pes pes_type;
  94
  95         int cc;
  96         int pusi_seen; /* prevents feeding of garbage from previous section */
  97
  98         u16 peslen;
  99
 100         struct list_head list_head;
 101                 int index; /* a unique index for each feed (can be used as hardware pid filter index) */
 102 };
 103
 104 struct dvb_demux {
 105         struct dmx_demux dmx;
 106         void *priv;
 107         int filternum;
 108         int feednum;
 109         int (*start_feed) (struct dvb_demux_feed *feed);
 110         int (*stop_feed) (struct dvb_demux_feed *feed);
 111         int (*write_to_decoder) (struct dvb_demux_feed *feed,
 112                                  const u8 *buf, size_t len);
 113         u32 (*check_crc32) (struct dvb_demux_feed *feed,
 114                             const u8 *buf, size_t len);
 115         void (*memcopy) (struct dvb_demux_feed *feed, u8 *dst,
 116                          const u8 *src, size_t len);
 117
 118         int users;
 119 #define MAX_DVB_DEMUX_USERS 10
 120         struct dvb_demux_filter *filter;
 121         struct dvb_demux_feed *feed;
 122
 123         struct list_head frontend_list;
 124
 125         struct dvb_demux_feed *pesfilter[DMX_TS_PES_OTHER];
 126         u16 pids[DMX_TS_PES_OTHER];
 127         int playing;
 128         int recording;
 129
 130 #define DMX_MAX_PID 0x2000
 131         struct list_head feed_list;
 132         u8 tsbuf[204];
 133         int tsbufp;
 134
 135         struct semaphore mutex;
 136         spinlock_t lock;
 137 };
 138
 139
 140 int dvb_dmx_init(struct dvb_demux *dvbdemux);
 141 int dvb_dmx_release(struct dvb_demux *dvbdemux);
 142 void dvb_dmx_swfilter_packets(struct dvb_demux *dvbdmx, const u8 *buf, size_t count);
 143 void dvb_dmx_swfilter(struct dvb_demux *demux, const u8 *buf, size_t count);
 144 void dvb_dmx_swfilter_204(struct dvb_demux *demux, const u8 *buf, size_t count);
 145
 146 #endif /* _DVB_DEMUX_H_ */