access.c

video linux conference

/*****************************************************************************
 * access.c: DVB card input v4l2 only
 *****************************************************************************
 * Copyright (C) 1998-2004 VideoLAN
 *
 * Authors: Johan Bilien <[e-mail]>
 *          Jean-Paul Saman <[e-mail]>
 *          Christophe Massiot <[e-mail]>
 *          Laurent Aimar <[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 <vlc/vlc.h>
#include <vlc/input.h>

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

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

#include <errno.h>

/* Include dvbpsi headers */
#ifdef HAVE_DVBPSI_DR_H
#   include <dvbpsi/dvbpsi.h>
#   include <dvbpsi/descriptor.h>
#   include <dvbpsi/pat.h>
#   include <dvbpsi/pmt.h>
#   include <dvbpsi/dr.h>
#   include <dvbpsi/psi.h>
#else
#   include "dvbpsi.h"
#   include "descriptor.h"
#   include "tables/pat.h"
#   include "tables/pmt.h"
#   include "descriptors/dr.h"
#   include "psi.h"
#endif

#include "dvb.h"

/*****************************************************************************
 * Module descriptor
 *****************************************************************************/
static int  Open( vlc_object_t *p_this );
static void Close( vlc_object_t *p_this );

#define CACHING_TEXT N_("Caching value in ms")
#define CACHING_LONGTEXT N_( \
    "Allows you to modify the default caching value for dvb streams. This " \
    "value should be set in millisecond units." )

#define ADAPTER_TEXT N_("Adapter card to tune")
#define ADAPTER_LONGTEXT N_("Adapter cards have a device file in directory named /dev/dvb/adapter[n] with n>=0.")

#define DEVICE_TEXT N_("Device number to use on adapter")
#define DEVICE_LONGTEXT ""

#define FREQ_TEXT N_("Transponder/multiplex frequency")
#define FREQ_LONGTEXT N_("In kHz for DVB-S or Hz for DVB-C/T")

#define INVERSION_TEXT N_("Inversion mode")
#define INVERSION_LONGTEXT N_("Inversion mode [0=off, 1=on, 2=auto]")

#define PROBE_TEXT N_("Probe DVB card for capabilities")
#define PROBE_LONGTEXT N_("Some DVB cards do not like to be probed for their capabilities.")

#define LNB_LOF1_TEXT N_("Antenna lnb_lof1 (kHz)")
#define LNB_LOF1_LONGTEXT ""

#define LNB_LOF2_TEXT N_("Antenna lnb_lof2 (kHz)")
#define LNB_LOF2_LONGTEXT ""

#define LNB_SLOF_TEXT N_("Antenna lnb_slof (kHz)")
#define LNB_SLOF_LONGTEXT ""

/* Satellite */
#define BUDGET_TEXT N_("Budget mode")
#define BUDGET_LONGTEXT N_("This allows you to stream an entire transponder with a budget card.")

#define SATNO_TEXT N_("Satellite number in the Diseqc system")
#define SATNO_LONGTEXT N_("[0=no diseqc, 1-4=satellite number]")

#define VOLTAGE_TEXT N_("LNB voltage")
#define VOLTAGE_LONGTEXT N_("In Volts [0, 13=vertical, 18=horizontal]")

#define HIGH_VOLTAGE_TEXT N_("High LNB voltage")
#define HIGH_VOLTAGE_LONGTEXT N_("Enable high voltage if your cables are " \
    "particularly long. This is not supported by all frontends.")

#define TONE_TEXT N_("22 kHz tone")
#define TONE_LONGTEXT N_("[0=off, 1=on, -1=auto]")

#define FEC_TEXT N_("Transponder FEC")
#define FEC_LONGTEXT N_("FEC=Forward Error Correction mode [9=auto]")

#define SRATE_TEXT N_("Transponder symbol rate in kHz")
#define SRATE_LONGTEXT ""

/* Cable */
#define MODULATION_TEXT N_("Modulation type")
#define MODULATION_LONGTEXT N_("Modulation type for front-end device.")

/* Terrestrial */
#define CODE_RATE_HP_TEXT N_("Terrestrial high priority stream code rate (FEC)")
#define CODE_RATE_HP_LONGTEXT ""

#define CODE_RATE_LP_TEXT N_("Terrestrial low priority stream code rate (FEC)")
#define CODE_RATE_LP_LONGTEXT ""

#define BANDWIDTH_TEXT N_("Terrestrial bandwidth")
#define BANDWIDTH_LONGTEXT N_("Terrestrial bandwidth [0=auto,6,7,8 in MHz]")

#define GUARD_TEXT N_("Terrestrial guard interval")
#define GUARD_LONGTEXT ""

#define TRANSMISSION_TEXT N_("Terrestrial transmission mode")
#define TRANSMISSION_LONGTEXT ""

#define HIERARCHY_TEXT N_("Terrestrial hierarchy mode")
#define HIERARCHY_LONGTEXT ""

vlc_module_begin();
    set_shortname( _("DVB") );
    set_description( N_("DVB input with v4l2 support") );
    set_category( CAT_INPUT );
    set_subcategory( SUBCAT_INPUT_ACCESS );

    add_integer( "dvb-caching", DEFAULT_PTS_DELAY / 1000, NULL, CACHING_TEXT,
                 CACHING_LONGTEXT, VLC_TRUE );
    add_integer( "dvb-adapter", 0, NULL, ADAPTER_TEXT, ADAPTER_LONGTEXT,
                 VLC_FALSE );
    add_integer( "dvb-device", 0, NULL, DEVICE_TEXT, DEVICE_LONGTEXT,
                 VLC_TRUE );
    add_integer( "dvb-frequency", 11954000, NULL, FREQ_TEXT, FREQ_LONGTEXT,
                 VLC_FALSE );
    add_integer( "dvb-inversion", 2, NULL, INVERSION_TEXT, INVERSION_LONGTEXT,
                 VLC_TRUE );
    add_bool( "dvb-probe", 1, NULL, PROBE_TEXT, PROBE_LONGTEXT, VLC_TRUE );
    add_integer( "dvb-lnb-lof1", 9750000, NULL, LNB_LOF1_TEXT,
                 LNB_LOF1_LONGTEXT, VLC_TRUE );
    add_integer( "dvb-lnb-lof2", 10600000, NULL, LNB_LOF2_TEXT,
                 LNB_LOF2_LONGTEXT, VLC_TRUE );
    add_integer( "dvb-lnb-slof", 11700000, NULL, LNB_SLOF_TEXT,
                 LNB_SLOF_LONGTEXT, VLC_TRUE );
    /* DVB-S (satellite) */
    add_bool( "dvb-budget-mode", 0, NULL, BUDGET_TEXT, BUDGET_LONGTEXT,
              VLC_TRUE );
    add_integer( "dvb-satno", 0, NULL, SATNO_TEXT, SATNO_LONGTEXT,
                 VLC_TRUE );
    add_integer( "dvb-voltage", 13, NULL, VOLTAGE_TEXT, VOLTAGE_LONGTEXT,
                 VLC_TRUE );
    add_bool( "dvb-high-voltage", 0, NULL, HIGH_VOLTAGE_TEXT,
              HIGH_VOLTAGE_LONGTEXT, VLC_TRUE );
    add_integer( "dvb-tone", -1, NULL, TONE_TEXT, TONE_LONGTEXT,
                 VLC_TRUE );
    add_integer( "dvb-fec", 9, NULL, FEC_TEXT, FEC_LONGTEXT, VLC_TRUE );
    add_integer( "dvb-srate", 27500000, NULL, SRATE_TEXT, SRATE_LONGTEXT,
                 VLC_FALSE );
    /* DVB-T (terrestrial) */
    add_integer( "dvb-modulation", 0, NULL, MODULATION_TEXT,
                 MODULATION_LONGTEXT, VLC_TRUE );
    /* DVB-T (terrestrial) */
    add_integer( "dvb-code-rate-hp", 9, NULL, CODE_RATE_HP_TEXT,
                 CODE_RATE_HP_LONGTEXT, VLC_TRUE );
    add_integer( "dvb-code-rate-lp", 9, NULL, CODE_RATE_LP_TEXT,
                 CODE_RATE_LP_LONGTEXT, VLC_TRUE );
    add_integer( "dvb-bandwidth", 0, NULL, BANDWIDTH_TEXT, BANDWIDTH_LONGTEXT,
                 VLC_TRUE );
    add_integer( "dvb-guard", 0, NULL, GUARD_TEXT, GUARD_LONGTEXT, VLC_TRUE );
    add_integer( "dvb-transmission", 0, NULL, TRANSMISSION_TEXT,
                 TRANSMISSION_LONGTEXT, VLC_TRUE );
    add_integer( "dvb-hierarchy", 0, NULL, HIERARCHY_TEXT, HIERARCHY_LONGTEXT,
                 VLC_TRUE );

    set_capability( "access2", 0 );
    add_shortcut( "dvb" );
    add_shortcut( "dvb-s" );
    add_shortcut( "qpsk" );
    add_shortcut( "dvb-c" );
    add_shortcut( "cable" );
    add_shortcut( "dvb-t" );
    add_shortcut( "terrestrial" );
    add_shortcut( "satellite" );    /* compatibility with the interface. */
    set_callbacks( Open, Close );
vlc_module_end();


/*****************************************************************************
 * Local prototypes
 *****************************************************************************/
static block_t *Block( access_t * );
static int Control( access_t *, int, va_list );

#define DVB_READ_ONCE 20
#define DVB_READ_ONCE_START 2
#define TS_PACKET_SIZE 188

static void FilterUnset( access_t *, int i_max );
static void FilterUnsetPID( access_t *, int i_pid );
static void FilterSet( access_t *, int i_pid, int i_type );

static void VarInit( access_t * );
static int  ParseMRL( access_t * );


/*****************************************************************************
 * Open: open the frontend device
 *****************************************************************************/
static int Open( vlc_object_t *p_this )
{
    access_t     *p_access = (access_t*)p_this;
    access_sys_t *p_sys;

    /* Only if selected */
    if( *p_access->psz_access == '\0' )
        return VLC_EGENERIC;

    /* Set up access */
    p_access->pf_read = NULL;
    p_access->pf_block = Block;
    p_access->pf_control = Control;
    p_access->pf_seek = NULL;
    p_access->info.i_update = 0;
    p_access->info.i_size = 0;
    p_access->info.i_pos = 0;
    p_access->info.b_eof = VLC_FALSE;
    p_access->info.i_title = 0;
    p_access->info.i_seekpoint = 0;

    p_access->p_sys = p_sys = malloc( sizeof( access_sys_t ) );
    memset( p_sys, 0, sizeof( access_sys_t ) );

    /* Create all variables */
    VarInit( p_access );

    /* Parse the command line */
    if( ParseMRL( p_access ) )
    {
        free( p_sys );
        return VLC_EGENERIC;
    }

    /* Getting frontend info */
    if( E_(FrontendOpen)( p_access) )
    {
        free( p_sys );
        return VLC_EGENERIC;
    }

    /* Setting frontend parameters for tuning the hardware */
    msg_Dbg( p_access, "trying to tune the frontend...");
    if( E_(FrontendSet)( p_access ) < 0 )
    {
        E_(FrontendClose)( p_access );
        free( p_sys );
        return VLC_EGENERIC;
    }

    /* Opening DVR device */
    if( E_(DVROpen)( p_access ) < 0 )
    {
        E_(FrontendClose)( p_access );
        free( p_sys );
        return VLC_EGENERIC;
    }

    p_sys->b_budget_mode = var_GetBool( p_access, "dvb-budget-mode" );
    if( p_sys->b_budget_mode )
    {
        msg_Dbg( p_access, "setting filter on all PIDs" );
        FilterSet( p_access, 0x2000, OTHER_TYPE );
    }
    else
    {
        msg_Dbg( p_access, "setting filter on PAT" );
        FilterSet( p_access, 0x0, OTHER_TYPE );
    }

    E_(CAMOpen)( p_access );

    if( p_sys->b_budget_mode )
        p_sys->i_read_once = DVB_READ_ONCE;
    else
        p_sys->i_read_once = DVB_READ_ONCE_START;

    return VLC_SUCCESS;
}

/*****************************************************************************
 * Close : Close the device
 *****************************************************************************/
static void Close( vlc_object_t *p_this )
{
    access_t     *p_access = (access_t*)p_this;
    access_sys_t *p_sys = p_access->p_sys;

    FilterUnset( p_access, p_sys->b_budget_mode ? 1 : MAX_DEMUX );

    E_(DVRClose)( p_access );
    E_(FrontendClose)( p_access );
    E_(CAMClose)( p_access );

    free( p_sys );
}

/*****************************************************************************
 * Block:
 *****************************************************************************/
static block_t *Block( access_t *p_access )
{
    access_sys_t *p_sys = p_access->p_sys;
    block_t *p_block;

    for ( ; ; )
    {
        struct timeval timeout;
        fd_set fds, fde;
        int i_ret;
        int i_max_handle = p_sys->i_handle;