access.c

video linux conference

    msg_Dbg( p_input, "opening DVR device `%s'", psz_dvr );

    if( (p_satellite->i_handle = open( psz_dvr,
                                   /*O_NONBLOCK | O_LARGEFILE*/0 )) == (-1) )
    {
        msg_Warn( p_input, "cannot open `%s' (%s)", psz_dvr, strerror(errno) );
        free( p_satellite );
        return -1;
    }

    /* FIXME : this is from the Dreambox port. I have no idea whether it
     * hurts or helps other DVB interfaces, so I just leave it here.
     * Feel free to remove it if it breaks. --Meuuh */
    ioctl_SetBufferSize( p_satellite->i_handle, DMX_BUFFER_SIZE );

    /* Get antenna configuration options */
    b_diseqc = config_GetInt( p_input, "diseqc" );
    i_lnb_lof1 = config_GetInt( p_input, "lnb-lof1" );
    i_lnb_lof2 = config_GetInt( p_input, "lnb-lof2" );
    i_lnb_slof = config_GetInt( p_input, "lnb-slof" );

    /* Initialize the Satellite Card */

    if ( i_freq )
    {
        int i_tuner = config_GetInt( p_input, "dvb-tuner" );

        msg_Dbg( p_input, "initializing Sat Card with Freq: %d, Pol: %d, "
                          "FEC: %03f, Srate: %d", i_freq, b_pol, f_fec, i_srate );

        if ( ioctl_SECControl( i_tuner, i_freq, b_pol, i_lnb_slof, b_diseqc ) < 0 )
        {
            msg_Err( p_input, "an error occurred when controling SEC" );
            close( p_satellite->i_handle );
            free( p_satellite );
            return -1;
        }

        msg_Dbg( p_input, "initializing frontend device" );
        switch (ioctl_SetQPSKFrontend ( i_tuner, i_freq, i_srate, f_fec,
                    i_lnb_lof1, i_lnb_lof2, i_lnb_slof))
        {
            case -2:
                msg_Err( p_input, "frontend returned an unexpected event" );
                close( p_satellite->i_handle );
                free( p_satellite );
                return -1;
                break;
            case -3:
                msg_Err( p_input, "frontend returned no event" );
                close( p_satellite->i_handle );
                free( p_satellite );
                return -1;
                break;
            case -4:
                msg_Err( p_input, "frontend: timeout when polling for event" );
                close( p_satellite->i_handle );
                free( p_satellite );
                return -1;
                break;
            case -5:
                msg_Err( p_input, "an error occured when polling frontend device" );
                close( p_satellite->i_handle );
                free( p_satellite );
                return -1;
                break;
            case -1:
                msg_Err( p_input, "frontend returned a failure event" );
                close( p_satellite->i_handle );
                free( p_satellite );
                return -1;
                break;
            default:
                break;
        }
    } /* i_freq */

    msg_Dbg( p_input, "setting filter on PAT" );
    AllocateDemux( p_input, 0, PAT_TYPE );

    if( input_InitStream( p_input, sizeof( stream_ts_data_t ) ) == -1 )
    {
        msg_Err( p_input, "could not initialize stream structure" );
        close( p_satellite->i_handle );
        free( p_satellite );
        return( -1 );
    }

    vlc_mutex_lock( &p_input->stream.stream_lock );

    p_input->stream.b_pace_control = 1;
    p_input->stream.b_seekable = 0;
    p_input->stream.p_selected_area->i_tell = 0;

    vlc_mutex_unlock( &p_input->stream.stream_lock );

    p_input->i_mtu = SATELLITE_READ_ONCE;
    p_input->stream.i_method = INPUT_METHOD_SATELLITE;

    return 0;
}

/*****************************************************************************
 * Close : Close the device
 *****************************************************************************/
void E_(Close) ( vlc_object_t *p_this )
{
    input_thread_t *    p_input = (input_thread_t *)p_this;
    thread_sat_data_t * p_satellite = (thread_sat_data_t *)p_input->p_access_data;

    msg_Dbg( p_input, "unsetting filters on all pids" );
    CloseProgram( p_input );
    close( p_satellite->p_demux_handles[0].i_handle );

    close( p_satellite->i_handle );
}

/*****************************************************************************
 * SatelliteRead: reads data from the satellite card
 *****************************************************************************/
static ssize_t SatelliteRead( input_thread_t * p_input, byte_t * p_buffer,
                              size_t i_len )
{
    thread_sat_data_t * p_satellite = (thread_sat_data_t *)p_input->p_access_data;
    ssize_t i_ret;

    unsigned int i;

    /* if not set, set filters to the PMTs */
    /* This is kludgy and consumes way too much CPU power - the access
     * module should have a callback from the demux when a new program
     * is encountered. --Meuuh */
    if ( !p_satellite->p_demux_handles[1].i_type )
    {
        int i_program = config_GetInt( p_input, "program" );

        for( i = 0; i < p_input->stream.i_pgrm_number; i++ )
        {
            /* Only set a filter on the selected program : some boards
             * (read: Dreambox) only have 8 filters, so you don't want to
             * spend them on unwanted PMTs. --Meuuh */
            if ( (!i_program || p_input->stream.pp_programs[i]->i_number == i_program) )
            {
                msg_Dbg( p_input, "setting filter on PMT pid %d",
                         p_input->stream.pp_programs[i]->pp_es[0]->i_id );
                AllocateDemux( p_input, p_input->stream.pp_programs[i]->pp_es[0]->i_id, PMT_TYPE );
            }
        }
    }

    i_ret = read( p_satellite->i_handle, p_buffer, i_len );
 
    if( i_ret < 0 )
    {
#   ifdef HAVE_ERRNO_H
        msg_Err( p_input, "read failed (%s)", strerror(errno) );
#   else
        msg_Err( p_input, "read failed" );
#   endif
    }
 
    return i_ret;
}

/*****************************************************************************
 * SatelliteSetArea : Does nothing
 *****************************************************************************/
static int SatelliteSetArea( input_thread_t * p_input, input_area_t * p_area )
{
    return -1;
}

/*****************************************************************************
 * SatelliteSetProgram : Sets the card filters according to the
 *                 selected program,
 *                 and makes the appropriate changes to stream structure.
 *****************************************************************************/
int SatelliteSetProgram( input_thread_t    * p_input,
                         pgrm_descriptor_t * p_new_prg )
{
    unsigned int i_es_index;
    vlc_value_t val;

    if ( p_input->stream.p_selected_program )
    {
        for ( i_es_index = 0 ; /* 0 should be the PMT */
                i_es_index < p_input->stream.p_selected_program->
                    i_es_number ;
                i_es_index ++ )
        {
#define p_es p_input->stream.p_selected_program->pp_es[i_es_index]
            if ( p_es->p_dec )
            {
                input_UnselectES( p_input , p_es );
            }
#undef p_es
        }
    }

    msg_Dbg( p_input, "unsetting filters on all pids" );
    CloseProgram( p_input );
    msg_Dbg( p_input, "setting filter on PMT pid %d",
             p_new_prg->pp_es[0]->i_id );
    AllocateDemux( p_input, p_new_prg->pp_es[0]->i_id, PMT_TYPE );

    for ( i_es_index = 1 ; i_es_index < p_new_prg->i_es_number ; i_es_index ++ )
    {
#define p_es p_new_prg->pp_es[i_es_index]
        switch( p_es->i_cat )
        {
            case VIDEO_ES:
                msg_Dbg(p_input, "setting filter on video ES 0x%x",
                        p_es->i_id);
                /* Always set the filter. This may seem a little odd, but
                 * it allows you to stream the video with demuxstream
                 * without having a decoder or a stream output behind.
                 * The result is you'll sometimes filter a PID which you
                 * don't really want, but in the most common cases it
                 * should be OK. --Meuuh */
                AllocateDemux( p_input, p_es->i_id, ES_TYPE );
                input_SelectES( p_input , p_es );
                break;

            case AUDIO_ES:
                msg_Dbg(p_input, "setting filter on audio ES 0x%x",
                        p_es->i_id);
                AllocateDemux( p_input, p_es->i_id, ES_TYPE );
                input_SelectES( p_input , p_es );
                break;

            default:
                /* Do not select private streams. This is to avoid the
                 * limit of 8 filters on the Dreambox and possibly on
                 * other boards. We should probably change that to
                 * have the DVB subtitles, but filtering all private
                 * streams including DVB tables and padding seems
                 * nonsense to me. --Meuuh */
#if 0
                msg_Dbg(p_input, "setting filter on misc (0x%x) ES 0x%x",
                        p_es->i_cat,
                        p_es->i_id);
                AllocateDemux( p_input, p_es->i_id, ES_TYPE );
                input_SelectES( p_input , p_es );
#endif
                break;
#undef p_es
        }
    }

    p_input->stream.p_selected_program = p_new_prg;

    /* Update the navigation variables without triggering a callback */
    val.i_int = p_new_prg->i_number;
    var_Change( p_input, "program", VLC_VAR_SETVALUE, &val, NULL );

    return 0;
}

/*****************************************************************************
 * SatelliteSeek: does nothing (not a seekable stream
 *****************************************************************************/
static void SatelliteSeek( input_thread_t * p_input, off_t i_off )
{
    ;
}