main.c

vlc stand 0.1.99 ist sehr einfach

/*****************************************************************************
 * main.c: main vlc source
 * Includes the main() function for vlc. Parses command line, start interface
 * and spawn threads.
 *****************************************************************************
 * Copyright (C) 1998, 1999, 2000 VideoLAN
 *
 * Authors:
 *
 * 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 "defs.h"

#include <signal.h>                               /* SIGHUP, SIGINT, SIGKILL */
#include <getopt.h>                                              /* getopt() */
#include <stdio.h>                                              /* sprintf() */

#include <errno.h>                                                 /* ENOMEM */
#include <stdlib.h>                                  /* getenv(), strtol(),  */
#include <string.h>                                            /* strerror() */

#include "config.h"
#include "common.h"
#include "threads.h"
#include "mtime.h"
#include "plugins.h"
#include "input_vlan.h"
#include "input_ps.h"

#include "intf_msg.h"
#include "interface.h"

#include "audio_output.h"

#ifdef SYS_BEOS
#include "beos_specific.h"
#endif

#include "main.h"

/*****************************************************************************
 * Command line options constants. If something is changed here, be sure that
 * GetConfiguration and Usage are also changed.
 *****************************************************************************/

/* Long options return values - note that values corresponding to short options
 * chars, and in general any regular char, should be avoided */
#define OPT_NOAUDIO             150
#define OPT_AOUT                151
#define OPT_STEREO              152
#define OPT_MONO                153

#define OPT_NOVIDEO             160
#define OPT_VOUT                161
#define OPT_DISPLAY             162
#define OPT_WIDTH               163
#define OPT_HEIGHT              164
#define OPT_COLOR               165

#define OPT_NOVLANS             170
#define OPT_SERVER              171
#define OPT_PORT                172

/* Usage fashion */
#define USAGE                     0
#define SHORT_HELP                1
#define LONG_HELP                 2

/* Long options */
static const struct option longopts[] =
{
    /*  name,               has_arg,    flag,   val */

    /* General/common options */
    {   "help",             0,          0,      'h' },
    {   "longhelp",         0,          0,      'H' },
    {   "version",          0,          0,      'v' },

    /* Audio options */
    {   "noaudio",          0,          0,      OPT_NOAUDIO },
    {   "aout",             1,          0,      OPT_AOUT },
    {   "stereo",           0,          0,      OPT_STEREO },
    {   "mono",             0,          0,      OPT_MONO },

    /* Video options */
    {   "novideo",          0,          0,      OPT_NOVIDEO },
    {   "vout",             1,          0,      OPT_VOUT },
    {   "display",          1,          0,      OPT_DISPLAY },
    {   "width",            1,          0,      OPT_WIDTH },
    {   "height",           1,          0,      OPT_HEIGHT },
    {   "grayscale",        0,          0,      'g' },
    {   "color",            0,          0,      OPT_COLOR },

    /* DVD options */
    {   "dvdaudio",         1,          0,      'a' },
    {   "dvdchannel",       1,          0,      'c' },
    {   "dvdsubtitle",      1,          0,      's' },
    
    /* Input options */
    {   "novlans",          0,          0,      OPT_NOVLANS },
    {   "server",           1,          0,      OPT_SERVER },
    {   "port",             1,          0,      OPT_PORT },

    {   0,                  0,          0,      0 }
};

/* Short options */
static const char *psz_shortopts = "hHvga:s:c:";

/*****************************************************************************
 * Global variable program_data - this is the one and only, see main.h
 *****************************************************************************/
main_t *p_main;

/*****************************************************************************
 * Local prototypes
 *****************************************************************************/
static void SetDefaultConfiguration ( void );
static int  GetConfiguration        ( int i_argc, char *ppsz_argv[], char *ppsz_env[] );
static void Usage                   ( int i_fashion );
static void Version                 ( void );

static void InitSignalHandler       ( void );
static void SignalHandler           ( int i_signal );
#ifdef HAVE_MMX
static int  TestMMX                 ( void );
#endif

/*****************************************************************************
 * main: parse command line, start interface and spawn threads
 *****************************************************************************
 * Steps during program execution are:
 *      -configuration parsing and messages interface initialization
 *      -openning of audio output device and some global modules
 *      -execution of interface, which exit on error or on user request
 *      -closing of audio output device and some global modules
 * On error, the spawned threads are cancelled, and the open devices closed.
 *****************************************************************************/
int main( int i_argc, char *ppsz_argv[], char *ppsz_env[] )
{
    main_t  main_data;                      /* root of all data - see main.h */
    char **p_playlist;
    int i_list_index;

    p_main = &main_data;                       /* set up the global variable */

    /*
     * System specific initialization code
     */
#ifdef SYS_BEOS
    beos_Init();
#endif

    /*
     * Read configuration, initialize messages interface and set up program
     */
#ifdef HAVE_MMX
    if( !TestMMX() )
    {
        fprintf( stderr, "Sorry, this program needs an MMX processor. Please run the non-MMX version.\n" );
        return( 1 );
    }
#endif
    p_main->p_msg = intf_MsgCreate();
    if( !p_main->p_msg )                         /* start messages interface */
    {
        fprintf( stderr, "critical error: can't initialize messages interface (%s)\n",
                strerror(errno) );
        return( errno );
    }
    if( GetConfiguration( i_argc, ppsz_argv, ppsz_env ) )  /* parse cmd line */
    {
        intf_MsgDestroy();
        return( errno );
    }

    /* get command line files */
    i_list_index = 0;

    if( optind < i_argc )
    {
        int i_index = 0;
        p_playlist = malloc( (i_list_index = i_argc - optind)
                                        * sizeof(int) );

        while( i_argc - i_index > optind )
        {
            p_playlist[ i_index ] = ppsz_argv[ i_argc - i_index - 1];
            i_index++;
        }
    }
    else
    {
        p_playlist = malloc( sizeof(int) );
        p_playlist[ 0 ] = "-";
        i_list_index = 1;
    }

    intf_MsgImm( COPYRIGHT_MESSAGE "\n" );          /* print welcome message */

    /*
     * Initialize shared resources and libraries
     */
    if( main_data.b_vlans && input_VlanCreate() )
    {
        /* On error during vlans initialization, switch of vlans */
        intf_Msg( "Virtual LANs initialization failed : vlans management is deactivated\n" );
        main_data.b_vlans = 0;
    }

    /*
     * Open audio device and start aout thread
     */
    if( main_data.b_audio )
    {
        main_data.p_aout = aout_CreateThread( NULL );
        if( main_data.p_aout == NULL )
        {
            /* On error during audio initialization, switch of audio */
            intf_Msg( "Audio initialization failed : audio is deactivated\n" );
            main_data.b_audio = 0;
        }
    }

    /*
     * Run interface
     */
    main_data.p_intf = intf_Create();
    if( main_data.p_intf != NULL )
    {
        main_data.p_intf->p_playlist = p_playlist;
        main_data.p_intf->i_list_index = i_list_index;

        InitSignalHandler();             /* prepare signals for interception */

        intf_Run( main_data.p_intf );
        intf_Destroy( main_data.p_intf );
    }

    /*
     * Close audio device
     */
    if( main_data.b_audio )
    {
        aout_DestroyThread( main_data.p_aout, NULL );
    }

    /*
     * Free shared resources and libraries
     */
    if( main_data.b_vlans )
    {
        input_VlanDestroy();
    }

    /*
     * System specific cleaning code
     */
#ifdef SYS_BEOS
    beos_Clean();
#endif

    /*
     * Terminate messages interface and program
     */
    intf_Msg( "Program terminated.\n" );
    intf_MsgDestroy();
    return( 0 );
}

/*****************************************************************************
 * main_GetIntVariable: get the int value of an environment variable
 *****************************************************************************
 * This function is used to read some default parameters in modules.
 *****************************************************************************/
int main_GetIntVariable( char *psz_name, int i_default )
{
    char *      psz_env;                                /* environment value */
    char *      psz_end;                             /* end of parsing index */
    long int    i_value;                                            /* value */

    psz_env = getenv( psz_name );
    if( psz_env )
    {
        i_value = strtol( psz_env, &psz_end, 0 );
        if( (*psz_env != '\0') && (*psz_end == '\0') )
        {
            return( i_value );
        }
    }
    return( i_default );
}

/*****************************************************************************
 * main_GetPszVariable: get the string value of an environment variable
 *****************************************************************************
 * This function is used to read some default parameters in modules.
 *****************************************************************************/
char * main_GetPszVariable( char *psz_name, char *psz_default )
{
    char *psz_env;

    psz_env = getenv( psz_name );
    if( psz_env )
    {
        return( psz_env );
    }
    return( psz_default );
}

/*****************************************************************************
 * main_PutPszVariable: set the string value of an environment variable
 *****************************************************************************
 * This function is used to set some default parameters in modules. The use of
 * this function will cause some memory leak: since some systems use the pointer
 * passed to putenv to store the environment string, it can't be freed.
 *****************************************************************************/
void main_PutPszVariable( char *psz_name, char *psz_value )
{
    char *psz_env;

    psz_env = malloc( strlen(psz_name) + strlen(psz_value) + 2 );
    if( psz_env == NULL )
    {
        intf_ErrMsg( "error: %s\n", strerror(ENOMEM) );
    }
    else
    {
        sprintf( psz_env, "%s=%s", psz_name, psz_value );
        if( putenv( psz_env ) )
        {
            intf_ErrMsg( "error: %s\n", strerror(errno) );
        }
    }
}

/*****************************************************************************
 * main_PutIntVariable: set the integer value of an environment variable
 *****************************************************************************
 * This function is used to set some default parameters in modules. The use of
 * this function will cause some memory leak: since some systems use the pointer
 * passed to putenv to store the environment string, it can't be freed.
 *****************************************************************************/
void main_PutIntVariable( char *psz_name, int i_value )
{
    char psz_value[ 256 ];                               /* buffer for value */

    sprintf( psz_value, "%d", i_value );
    main_PutPszVariable( psz_name, psz_value );
}