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 #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 <asm/semaphore.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 struct 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
  63 struct 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
  97 struct 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 semaphore mutex;
 129         spinlock_t lock;
 130 };
 131
 132 int dvb_dmx_init(struct dvb_demux *dvbdemux);
 133 void dvb_dmx_release(struct dvb_demux *dvbdemux);
 134 void dvb_dmx_swfilter_packets(struct dvb_demux *dvbdmx, const u8 *buf,
 135                               size_t count);
 136 void dvb_dmx_swfilter(struct dvb_demux *demux, const u8 *buf, size_t count);
 137 void dvb_dmx_swfilter_204(struct dvb_demux *demux, const u8 *buf,
 138                           size_t count);
 139
 140 #endif /* _DVB_DEMUX_H_ */