dvb_demux.h

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/*
 * dvb_demux.h: DVB kernel demux API
 *
 * Copyright (C) 2000-2001 Marcus Metzler & Ralph Metzler
 *                         for convergence integrated media GmbH
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public License
 * as published by the Free Software Foundation; either version 2.1
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 */

#ifndef _DVB_DEMUX_H_
#define _DVB_DEMUX_H_

#include <linux/time.h>
#include <linux/timer.h>
#include <linux/spinlock.h>
#include <linux/mutex.h>

#include "demux.h"

#define DMX_TYPE_TS  0
#define DMX_TYPE_SEC 1
#define DMX_TYPE_PES 2

#define DMX_STATE_FREE      0
#define DMX_STATE_ALLOCATED 1
#define DMX_STATE_SET       2
#define DMX_STATE_READY     3
#define DMX_STATE_GO        4

#define DVB_DEMUX_MASK_MAX 18

#define MAX_PID 0x1fff

#define SPEED_PKTS_INTERVAL 50000

struct dvb_demux_filter {
    struct dmx_section_filter filter;
    u8 maskandmode[DMX_MAX_FILTER_SIZE];
    u8 maskandnotmode[DMX_MAX_FILTER_SIZE];
    int doneq;

    struct dvb_demux_filter *next;
    struct dvb_demux_feed *feed;
    int index;
    int state;
    int type;

    u16 hw_handle;
    struct timer_list timer;
};

#define DMX_FEED_ENTRY(pos) list_entry(pos, struct dvb_demux_feed, list_head)

struct dvb_demux_feed {
    union {
        struct dmx_ts_feed ts;
        struct dmx_section_feed sec;
    } feed;

    union {
        dmx_ts_cb ts;
        dmx_section_cb sec;
    } cb;

    struct dvb_demux *demux;
    void *priv;
    int type;
    int state;
    u16 pid;
    u8 *buffer;
    int buffer_size;

    struct timespec timeout;
    struct dvb_demux_filter *filter;

    int ts_type;
    enum dmx_ts_pes pes_type;

    int cc;
    int pusi_seen;      /* prevents feeding of garbage from previous section */

    u16 peslen;

    struct list_head list_head;
    unsigned int index; /* a unique index for each feed (can be used as hardware pid filter index) */
};

struct dvb_demux {
    struct dmx_demux dmx;
    void *priv;
    int filternum;
    int feednum;
    int (*start_feed)(struct dvb_demux_feed *feed);
    int (*stop_feed)(struct dvb_demux_feed *feed);
    int (*write_to_decoder)(struct dvb_demux_feed *feed,
                 const u8 *buf, size_t len);
    u32 (*check_crc32)(struct dvb_demux_feed *feed,
                const u8 *buf, size_t len);
    void (*memcopy)(struct dvb_demux_feed *feed, u8 *dst,
             const u8 *src, size_t len);

    int users;
#define MAX_DVB_DEMUX_USERS 10
    struct dvb_demux_filter *filter;
    struct dvb_demux_feed *feed;

    struct list_head frontend_list;

    struct dvb_demux_feed *pesfilter[DMX_TS_PES_OTHER];
    u16 pids[DMX_TS_PES_OTHER];
    int playing;
    int recording;

#define DMX_MAX_PID 0x2000
    struct list_head feed_list;
    u8 tsbuf[204];
    int tsbufp;

    struct mutex mutex;
    spinlock_t lock;

    uint8_t *cnt_storage; /* for TS continuity check */

    struct timespec speed_last_time; /* for TS speed check */
    uint32_t speed_pkts_cnt; /* for TS speed check */
};

int dvb_dmx_init(struct dvb_demux *dvbdemux);
void dvb_dmx_release(struct dvb_demux *dvbdemux);
void dvb_dmx_swfilter_packets(struct dvb_demux *dvbdmx, const u8 *buf,
                  size_t count);
void dvb_dmx_swfilter(struct dvb_demux *demux, const u8 *buf, size_t count);
void dvb_dmx_swfilter_204(struct dvb_demux *demux, const u8 *buf,
              size_t count);
void dvb_dmx_swfilter_raw(struct dvb_demux *demux, const u8 *buf,
              size_t count);

#endif /* _DVB_DEMUX_H_ */