access.c

video linux conference

/*****************************************************************************
 * access.c: Satellite card input
 *****************************************************************************
 * Copyright (C) 1998-2003 VideoLAN
 *
 * Authors: Johan Bilien <[e-mail]>
 *          Christophe Massiot <[e-mail]>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 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 General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
 *****************************************************************************/


/*****************************************************************************
 * Preamble
 *****************************************************************************/
#include <stdio.h>
#include <stdlib.h>

#include <vlc/vlc.h>
#include <vlc/input.h>

#include "../../demux/mpeg/system.h"

#ifdef HAVE_UNISTD_H
#   include <unistd.h>
#endif

#include <fcntl.h>
#include <sys/types.h>
#include <string.h>
#include <errno.h>

#ifdef STRNCASECMP_IN_STRINGS_H
#   include <strings.h>
#endif

#include "dvb.h"

/* These are for the Dreambox port. I have no idea whether they're correct
 * for other DVB adapters. --Meuuh */
#define SATELLITE_READ_ONCE (64 * 1024)
#define DMX_BUFFER_SIZE (1024 * 1024)

/*****************************************************************************
 * Local prototypes
 *****************************************************************************/
static ssize_t SatelliteRead( input_thread_t * p_input, byte_t * p_buffer,
                                     size_t i_len );
static int     SatelliteSetArea    ( input_thread_t *, input_area_t * );
static int     SatelliteSetProgram ( input_thread_t *, pgrm_descriptor_t * );
static void    SatelliteSeek       ( input_thread_t *, off_t );

typedef struct demux_handle_t
{
    int i_pid;
    int i_handle;
    int i_type;
} demux_handle_t;

#define PAT_TYPE 1
#define PMT_TYPE 2
#define ES_TYPE 3

#define MAX_DEMUX 8 

typedef struct thread_sat_data_t
{
    int i_handle;
    demux_handle_t p_demux_handles[MAX_DEMUX];
} thread_sat_data_t;

static void AllocateDemux( input_thread_t * p_input, int i_pid,
                           int i_type )
{
    thread_sat_data_t * p_satellite = (thread_sat_data_t *)p_input->p_access_data;
    int                 i_demux;
    int                 i;
    i_demux = config_GetInt( p_input, "dvb-dmx" );

    /* Find first free slot */
    for ( i = 0; i < MAX_DEMUX; i++ )
    {
        if ( !p_satellite->p_demux_handles[i].i_type )
        {
            if (ioctl_SetDMXFilter( i_demux, i_pid, &p_satellite->p_demux_handles[i].i_handle, 3) < 0)
            {
                msg_Warn(p_input, "ioctl_SetDMXFilter failed (%d)", i_pid);
                break;
            }
            p_satellite->p_demux_handles[i].i_type = i_type;
            p_satellite->p_demux_handles[i].i_pid = i_pid;
            break;
        }
    }
}

static void CloseProgram( input_thread_t * p_input )
{
    thread_sat_data_t * p_satellite = (thread_sat_data_t *)p_input->p_access_data;
    int i;

    for ( i = 1; i < MAX_DEMUX; i++ )
    {
        if ( p_satellite->p_demux_handles[i].i_type )
        {
            ioctl_UnsetDMXFilter( p_satellite->p_demux_handles[i].i_handle );
            p_satellite->p_demux_handles[i].i_type = 0;
        }
    }
}

/*****************************************************************************
 * Open: open the dvr device
 *****************************************************************************/
int E_(Open) ( vlc_object_t *p_this )
{
    input_thread_t *    p_input = (input_thread_t *)p_this;
    thread_sat_data_t * p_satellite;
    char *              psz_parser;
    char *              psz_next;
    int                 i_freq = 0;
    int                 i_srate = 0;
    vlc_bool_t          b_pol = 0;
    int                 i_fec = 0;
    float               f_fec = 1./2;
    vlc_bool_t          b_diseqc;
    int                 i_lnb_lof1;
    int                 i_lnb_lof2;
    int                 i_lnb_slof;
    int                 i_demux;
    char                psz_dvr[255];
    i_demux = config_GetInt( p_input, "dvb-dmx" );
    snprintf(psz_dvr, sizeof(psz_dvr), DVR "%d", i_demux);

    /* parse the options passed in command line : */

    psz_parser = strdup( p_input->psz_name );

    if( !psz_parser )
    {
        return( -1 );
    }

    p_input->pf_read = SatelliteRead;
    p_input->pf_set_program = SatelliteSetProgram;
    p_input->pf_set_area = SatelliteSetArea;
    p_input->pf_seek = SatelliteSeek;

    i_freq = (int)strtol( psz_parser, &psz_next, 10 );

    if( *psz_next )
    {
        psz_parser = psz_next + 1;
        b_pol = (vlc_bool_t)strtol( psz_parser, &psz_next, 10 );
            if( *psz_next )
            {
                psz_parser = psz_next + 1;
                i_fec = (int)strtol( psz_parser, &psz_next, 10 );
                if( *psz_next )
                {
                    psz_parser = psz_next + 1;
                    i_srate = (int)strtol( psz_parser, &psz_next, 10 );
                }
            }

    }

    if( i_freq > (12999*1000) || i_freq < (10000*1000) )
    {
        msg_Warn( p_input, "invalid frequency, using default one" );
        i_freq = config_GetInt( p_input, "frequency" );
        if( i_freq && (i_freq > (12999*1000) || i_freq < (10000*1000)) )
        {
            msg_Err( p_input, "invalid default frequency" );
            return -1;
        }
    }

    if( i_freq && (i_srate > (30000*1000) || i_srate < (1000*1000)) )
    {
        msg_Warn( p_input, "invalid symbol rate, using default one" );
        i_srate = config_GetInt( p_input, "symbol-rate" );
        if( i_srate > (30000*1000) || i_srate < (1000*1000) )
        {
            msg_Err( p_input, "invalid default symbol rate" );
            return -1;
        }
    }

    if( i_freq && b_pol && b_pol != 1 )
    {
        msg_Warn( p_input, "invalid polarization, using default one" );
        b_pol = config_GetInt( p_input, "polarization" );
        if( b_pol && b_pol != 1 )
        {
            msg_Err( p_input, "invalid default polarization" );
            return -1;
        }
    }

    if( i_freq && (i_fec > 7 || i_fec < 1) )
    {
        msg_Warn( p_input, "invalid FEC, using default one" );
        i_fec = config_GetInt( p_input, "fec" );
        if( i_fec > 7 || i_fec < 1 )
        {
            msg_Err( p_input, "invalid default FEC" );
            return -1;
        }
    }

    if ( i_freq )
    {
        switch( i_fec )
        {
            case 1:
                f_fec = 1./2;
                break;
            case 2:
                f_fec = 2./3;
                break;
            case 3:
                f_fec = 3./4;
                break;
            case 4:
                f_fec = 4./5;
                break;
            case 5:
                f_fec = 5./6;
                break;
            case 6:
                f_fec = 6./7;
                break;
            case 7:
                f_fec = 7./8;
                break;
            default:
                /* cannot happen */
                break;
        }
    }


    /* Initialise structure */
    p_satellite = malloc( sizeof( thread_sat_data_t ) );

    if( p_satellite == NULL )
    {
        msg_Err( p_input, "out of memory" );
        return -1;
    }
    memset( p_satellite, 0, sizeof( thread_sat_data_t ) );

    p_input->p_access_data = (void *)p_satellite;

    /* Open the DVR device */