git.sesse.net Git - vlc/blob - src/interface/interface.c

   1 /*****************************************************************************
   2  * interface.c: interface access for other threads
   3  * This library provides basic functions for threads to interact with user
   4  * interface, such as command line.
   5  *****************************************************************************
   6  * Copyright (C) 1998, 1999, 2000 VideoLAN
   7  *
   8  * Authors:
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
  23  *****************************************************************************/
  24
  25 /*****************************************************************************
  26  * Preamble
  27  *****************************************************************************/
  28 #include "defs.h"
  29
  30 #include <errno.h>                                                 /* ENOMEM */
  31 #include <stdlib.h>                                      /* free(), strtol() */
  32 #include <stdio.h>                                                   /* FILE */
  33 #include <string.h>                                            /* strerror() */
  34 #include <sys/types.h>                        /* on BSD, uio.h needs types.h */
  35 #include <sys/uio.h>                                          /* for input.h */
  36
  37 #include "config.h"
  38 #include "common.h"
  39 #include "threads.h"
  40 #include "mtime.h"
  41 #include "plugins.h"
  42 #include "playlist.h"
  43 #include "stream_control.h"
  44 #include "input_ext-intf.h"
  45
  46 #include "audio_output.h"
  47
  48 #include "intf_msg.h"
  49 #include "interface.h"
  50 #include "intf_cmd.h"
  51 #include "intf_console.h"
  52 #include "keystrokes.h"
  53
  54 #include "video.h"
  55 #include "video_output.h"
  56
  57 #include "main.h"
  58
  59 /*****************************************************************************
  60  * intf_channel_t: channel description
  61  *****************************************************************************
  62  * A 'channel' is a descriptor of an input method. It is used to switch easily
  63  * from source to source without having to specify the whole input thread
  64  * configuration. The channels array, stored in the interface thread object, is
  65  * loaded in intf_Create, and unloaded in intf_Destroy.
  66  *****************************************************************************/
  67 typedef struct intf_channel_s
  68 {
  69     /* Channel description */
  70     int         i_channel;            /* channel number, -1 for end of array */
  71     char *      psz_description;              /* channel description (owned) */
  72
  73     /* Input configuration */
  74     int         i_input_method;                   /* input method descriptor */
  75     char *      psz_input_source;                   /* source string (owned) */
  76     int         i_input_port;                                        /* port */
  77     int         i_input_vlan;                                        /* vlan */
  78 } intf_channel_t;
  79
  80 /*****************************************************************************
  81  * Local prototypes
  82  *****************************************************************************/
  83 static int      LoadChannels    ( intf_thread_t *p_intf, char *psz_filename );
  84 static void     UnloadChannels  ( intf_thread_t *p_intf );
  85 static int      ParseChannel    ( intf_channel_t *p_channel, char *psz_str );
  86
  87 /*****************************************************************************
  88  * intf_Create: prepare interface before main loop
  89  *****************************************************************************
  90  * This function opens output devices and creates specific interfaces. It sends
  91  * its own error messages.
  92  *****************************************************************************/
  93 intf_thread_t* intf_Create( void )
  94 {
  95     intf_thread_t * p_intf;
  96     typedef void    ( intf_getplugin_t ) ( intf_thread_t * p_intf );
  97     int             i_index;
  98     int             i_best_index = 0, i_best_score = 0;
  99
 100     /* Allocate structure */
 101     p_intf = malloc( sizeof( intf_thread_t ) );
 102     if( !p_intf )
 103     {
 104         intf_ErrMsg("error: %s\n", strerror( ENOMEM ) );
 105         return( NULL );
 106     }
 107
 108     /* Get a suitable interface plugin */
 109     for( i_index = 0 ; i_index < p_main->p_bank->i_plugin_count ; i_index++ )
 110     {
 111         /* If there's a plugin in p_info ... */
 112         if( p_main->p_bank->p_info[ i_index ] != NULL )
 113         {
 114             /* ... and if this plugin provides the functions we want ... */
 115             if( p_main->p_bank->p_info[ i_index ]->intf_GetPlugin != NULL )
 116             {
 117                 /* ... and if this plugin has a good score ... */
 118                 if( p_main->p_bank->p_info[ i_index ]->i_score > i_best_score )
 119                 {
 120                     /* ... then take it */
 121                     i_best_score = p_main->p_bank->p_info[ i_index ]->i_score;
 122                     i_best_index = i_index;
 123                 }
 124             }
 125         }
 126     }
 127
 128     if( i_best_score == 0 )
 129     {
 130         free( p_intf );
 131         intf_ErrMsg( "error: no suitable plugin to create interface\n" );
 132         return( NULL );
 133     }
 134
 135     /* Get the plugin functions */
 136     ( (intf_getplugin_t *)
 137       p_main->p_bank->p_info[ i_best_index ]->intf_GetPlugin )( p_intf );
 138
 139     /* Initialize structure */
 140     p_intf->b_die =     0;
 141     p_intf->p_vout =    NULL;
 142     p_intf->p_input =   NULL;
 143     p_intf->p_keys =    NULL;
 144
 145     /* Warning level initialisation */
 146     p_intf->i_warning_level = main_GetIntVariable( INTF_WARNING_VAR, INTF_WARNING_DEFAULT );
 147
 148     /* Load channels - the pointer will be set to NULL on failure. The
 149      * return value is ignored since the program can work without
 150      * channels */
 151     LoadChannels( p_intf, main_GetPszVariable( INTF_CHANNELS_VAR, INTF_CHANNELS_DEFAULT ));
 152
 153     /* Start interfaces */
 154     p_intf->p_console = intf_ConsoleCreate();
 155     if( p_intf->p_console == NULL )
 156     {
 157         intf_ErrMsg("error: can't create control console\n");
 158         free( p_intf );
 159         return( NULL );
 160     }
 161     if( p_intf->p_sys_create( p_intf ) )
 162     {
 163         intf_ErrMsg("error: can't create interface\n");
 164         intf_ConsoleDestroy( p_intf->p_console );
 165         free( p_intf );
 166         return( NULL );
 167     }
 168
 169     intf_Msg("Interface initialized\n");
 170     return( p_intf );
 171 }
 172
 173 /*****************************************************************************
 174  * intf_Run
 175  *****************************************************************************
 176  * Initialization script and main interface loop.
 177  *****************************************************************************/
 178 void intf_Run( intf_thread_t *p_intf )
 179 {
 180     char * psz_server = main_GetPszVariable( INPUT_SERVER_VAR, NULL );
 181     input_config_t *    p_input_config;
 182
 183     /* If a server was specified */
 184     if( psz_server )
 185     {
 186         if( (p_input_config =
 187               (input_config_t *)malloc( sizeof(input_config_t) )) == NULL )
 188         {
 189             intf_ErrMsg("Out of memory");
 190         }
 191         else
 192         {
 193             p_input_config->i_method = INPUT_METHOD_UCAST;
 194             p_input_config->p_source = psz_server;
 195             p_input_config->p_default_aout = p_main->p_aout;
 196             p_input_config->p_default_vout = p_intf->p_vout;
 197
 198             p_intf->p_input = input_CreateThread( p_input_config, NULL );
 199         }
 200     }
 201     /* Or if a file was specified */
 202     else if( p_main->p_playlist->p_list != NULL )
 203     {
 204         if( (p_input_config =
 205               (input_config_t *)malloc( sizeof(input_config_t) )) == NULL )
 206         {
 207             intf_ErrMsg("Out of memory");
 208         }
 209         else
 210         {
 211             p_input_config->i_method = INPUT_METHOD_FILE;
 212             p_input_config->p_source = p_main->p_playlist->p_list[0]; /* FIXME ??? */
 213             p_input_config->p_default_aout = p_main->p_aout;
 214             p_input_config->p_default_vout = p_intf->p_vout;
 215
 216             p_intf->p_input = input_CreateThread( p_input_config, NULL );
 217         }
 218     }
 219     /* Execute the initialization script - if a positive number is returned,
 220      * the script could be executed but failed */
 221     else if( intf_ExecScript( main_GetPszVariable( INTF_INIT_SCRIPT_VAR, INTF_INIT_SCRIPT_DEFAULT ) ) > 0 )
 222     {
 223         intf_ErrMsg("warning: error(s) during startup script\n");
 224     }
 225
 226     /* Main loop */
 227     while(!p_intf->b_die)
 228     {
 229         /* Flush waiting messages */
 230         intf_FlushMsg();
 231
 232         /* Manage specific interface */
 233         p_intf->p_sys_manage( p_intf );
 234
 235         /* Check attached threads status */
 236         if( (p_intf->p_vout != NULL) && p_intf->p_vout->b_error )
 237         {
 238             /* FIXME: add aout error detection ?? */
 239             p_intf->b_die = 1;
 240         }
 241         if( (p_intf->p_input != NULL) && p_intf->p_input->b_error )
 242         {
 243             input_DestroyThread( p_intf->p_input, NULL );
 244             p_intf->p_input = NULL;
 245             intf_DbgMsg("Input thread destroyed\n");
 246         }
 247
 248         /* Sleep to avoid using all CPU - since some interfaces needs to access
 249          * keyboard events, a 100ms delay is a good compromise */
 250         msleep( INTF_IDLE_SLEEP );
 251     }
 252 }
 253
 254 /*****************************************************************************
 255  * intf_Destroy: clean interface after main loop
 256  *****************************************************************************
 257  * This function destroys specific interfaces and close output devices.
 258  *****************************************************************************/
 259 void intf_Destroy( intf_thread_t *p_intf )
 260 {
 261     p_intf_key  p_cur;
 262     p_intf_key  p_next;
 263     /* Destroy interfaces */
 264     p_intf->p_sys_destroy( p_intf );
 265     intf_ConsoleDestroy( p_intf->p_console );
 266
 267     /* Unload channels */
 268     UnloadChannels( p_intf );
 269
 270     /* Destroy keymap */
 271     p_cur = p_intf->p_keys;
 272     while( p_cur != NULL)
 273     {
 274         p_next = p_cur->next;
 275         free(p_cur);
 276         p_cur = p_next;
 277     }
 278
 279
 280         /* Free structure */
 281     free( p_intf );
 282 }
 283
 284 /*****************************************************************************
 285  * intf_SelectChannel: change channel
 286  *****************************************************************************
 287  * Kill existing input, if any, and try to open a new one, using an input
 288  * configuration table.
 289  *****************************************************************************/
 290 int intf_SelectChannel( intf_thread_t * p_intf, int i_channel )
 291 {
 292     /* FIXME */
 293 #if 0
 294     intf_channel_t *    p_channel;                                /* channel */
 295
 296     /* Look for channel in array */
 297     if( p_intf->p_channel != NULL )
 298     {
 299         for( p_channel = p_intf->p_channel; p_channel->i_channel != -1; p_channel++ )
 300         {
 301             if( p_channel->i_channel == i_channel )
 302             {
 303             /*
 304              * Change channel
 305              */
 306
 307             /* Kill existing input, if any */
 308             if( p_intf->p_input != NULL )
 309             {
 310                 input_DestroyThread( p_intf->p_input, NULL );
 311             }
 312
 313             intf_Msg("Channel %d: %s\n", i_channel, p_channel->psz_description );
 314
 315             /* Open a new input */
 316             p_intf->p_input = input_CreateThread( p_channel->i_input_method, p_channel->psz_input_source,
 317                                   p_channel->i_input_port, p_channel->i_input_vlan,
 318                                   p_intf->p_vout, p_main->p_aout, NULL );
 319             return( p_intf->p_input == NULL );
 320             }
 321         }
 322     }
 323
 324     /* Channel does not exist */
 325     intf_Msg("Channel %d does not exist\n", i_channel );
 326 #endif
 327     return( 1 );
 328 }
 329
 330 /*****************************************************************************
 331  * intf_AssignKey: assign standartkeys                                       *
 332  *****************************************************************************
 333  * This function fills in the associative array that links the key pressed   *
 334  * and the key we use internally. Support one extra parameter.               *
 335  ****************************************************************************/
 336 void intf_AssignKey( intf_thread_t *p_intf, int r_key, int f_key, int param)
 337 {
 338     p_intf_key  p_cur =  p_intf->p_keys;
 339     if( p_cur == NULL )
 340     {
 341         p_cur = (p_intf_key )(malloc ( sizeof( intf_key ) ) );
 342         p_cur->received_key = r_key;
 343         p_cur->forwarded.key = f_key;
 344         p_cur->forwarded.param = param;
 345         p_cur->next = NULL;
 346         p_intf->p_keys = p_cur;
 347     }
 348     else
 349     {
 350         while( p_cur->next != NULL && p_cur ->received_key != r_key)
 351         {
 352             p_cur = p_cur->next;
 353         }
 354         if( p_cur->next == NULL )
 355         {
 356             p_cur->next  = ( p_intf_key )( malloc( sizeof( intf_key ) ) );
 357             p_cur = p_cur->next;
 358             p_cur->next = NULL;
 359             p_cur->forwarded.param = param;
 360             p_cur->received_key = r_key;
 361         }
 362         p_cur->forwarded.key = f_key;
 363     }
 364 }
 365
 366 /* Basic getKey function... */
 367 keyparm intf_GetKey( intf_thread_t *p_intf, int r_key)
 368 {
 369     keyparm reply;
 370
 371     p_intf_key current = p_intf->p_keys;
 372     while(current != NULL && current->received_key != r_key)
 373     {
 374         current = current->next;
 375     }
 376     if(current == NULL)
 377     {   /* didn't find any key in the array */
 378         reply.key = INTF_KEY_UNKNOWN;
 379         reply.param = 0;
 380     }
 381     else
 382     {
 383         reply.key = current->forwarded.key;
 384         reply.param = current->forwarded.param;
 385     }
 386     return reply;
 387 }
 388
 389 /*****************************************************************************
 390 * intf_AssignNormalKeys: used for normal interfaces.
 391 *****************************************************************************
 392 * This function assign the basic key to the normal keys.
 393 *****************************************************************************/
 394
 395 void intf_AssignNormalKeys( intf_thread_t *p_intf)
 396 {
 397     p_intf->p_intf_get_key = intf_GetKey;
 398
 399     intf_AssignKey( p_intf , 'Q', INTF_KEY_QUIT, 0);
 400     intf_AssignKey( p_intf , 'q', INTF_KEY_QUIT, 0);
 401     intf_AssignKey( p_intf ,  27, INTF_KEY_QUIT, 0);
 402     intf_AssignKey( p_intf ,   3, INTF_KEY_QUIT, 0);
 403     intf_AssignKey( p_intf , '0', INTF_KEY_SET_CHANNEL, 0);
 404     intf_AssignKey( p_intf , '1', INTF_KEY_SET_CHANNEL, 1);
 405     intf_AssignKey( p_intf , '2', INTF_KEY_SET_CHANNEL, 2);
 406     intf_AssignKey( p_intf , '3', INTF_KEY_SET_CHANNEL, 3);
 407     intf_AssignKey( p_intf , '4', INTF_KEY_SET_CHANNEL, 4);
 408     intf_AssignKey( p_intf , '5', INTF_KEY_SET_CHANNEL, 5);
 409     intf_AssignKey( p_intf , '6', INTF_KEY_SET_CHANNEL, 6);
 410     intf_AssignKey( p_intf , '7', INTF_KEY_SET_CHANNEL, 7);
 411     intf_AssignKey( p_intf , '8', INTF_KEY_SET_CHANNEL, 8);
 412     intf_AssignKey( p_intf , '9', INTF_KEY_SET_CHANNEL, 9);
 413     intf_AssignKey( p_intf , '0', INTF_KEY_SET_CHANNEL, 0);
 414     intf_AssignKey( p_intf , '+', INTF_KEY_INC_VOLUME, 0);
 415     intf_AssignKey( p_intf , '-', INTF_KEY_DEC_VOLUME, 0);
 416     intf_AssignKey( p_intf , 'm', INTF_KEY_TOGGLE_VOLUME, 0);
 417     intf_AssignKey( p_intf , 'M', INTF_KEY_TOGGLE_VOLUME, 0);
 418     intf_AssignKey( p_intf , 'g', INTF_KEY_DEC_GAMMA, 0);
 419     intf_AssignKey( p_intf , 'G', INTF_KEY_INC_GAMMA, 0);
 420     intf_AssignKey( p_intf , 'c', INTF_KEY_TOGGLE_GRAYSCALE, 0);
 421     intf_AssignKey( p_intf , ' ', INTF_KEY_TOGGLE_INTERFACE, 0);
 422     intf_AssignKey( p_intf , 'i', INTF_KEY_TOGGLE_INFO, 0);
 423     intf_AssignKey( p_intf , 's', INTF_KEY_TOGGLE_SCALING, 0);
 424 }
 425
 426 /*****************************************************************************
 427  * intf_ProcessKey: process standard keys
 428  *****************************************************************************
 429  * This function will process standard keys and return non 0 if the key was
 430  * unknown.
 431  *****************************************************************************/
 432 int intf_ProcessKey( intf_thread_t *p_intf, int g_key )
 433 {
 434     static int i_volbackup;
 435     keyparm k_reply;
 436
 437     k_reply = intf_GetKey( p_intf, g_key);
 438
 439     switch( k_reply.key )
 440     {
 441     case INTF_KEY_QUIT:                                                  /* quit order */
 442         p_intf->b_die = 1;
 443         break;
 444     case INTF_KEY_SET_CHANNEL:
 445         /* Change channel - return code is ignored since SelectChannel displays
 446          * its own error messages */
 447         intf_SelectChannel( p_intf, k_reply.param );
 448         break;
 449     case INTF_KEY_INC_VOLUME:                                                    /* volume + */
 450         if( (p_main->p_aout != NULL) && (p_main->p_aout->vol < VOLMAX) )
 451             p_main->p_aout->vol += VOLSTEP;
 452         break;
 453     case INTF_KEY_DEC_VOLUME:                                                    /* volume - */
 454         if( (p_main->p_aout != NULL) && (p_main->p_aout->vol > VOLSTEP) )
 455             p_main->p_aout->vol -= VOLSTEP;
 456         break;
 457     case INTF_KEY_TOGGLE_VOLUME:                                                 /* toggle mute */
 458         if( (p_main->p_aout != NULL) && (p_main->p_aout->vol))
 459         {
 460             i_volbackup = p_main->p_aout->vol;
 461             p_main->p_aout->vol = 0;
 462         }
 463         else if( (p_main->p_aout != NULL) && (!p_main->p_aout->vol))
 464             p_main->p_aout->vol = i_volbackup;
 465         break;
 466     case INTF_KEY_DEC_GAMMA:                                                     /* gamma - */
 467         if( (p_intf->p_vout != NULL) && (p_intf->p_vout->f_gamma > -INTF_GAMMA_LIMIT) )
 468         {
 469             vlc_mutex_lock( &p_intf->p_vout->change_lock );
 470             p_intf->p_vout->f_gamma   -= INTF_GAMMA_STEP;
 471             p_intf->p_vout->i_changes |= VOUT_GAMMA_CHANGE;
 472             vlc_mutex_unlock( &p_intf->p_vout->change_lock );
 473         }
 474         break;
 475     case INTF_KEY_INC_GAMMA:                                                     /* gamma + */
 476         if( (p_intf->p_vout != NULL) && (p_intf->p_vout->f_gamma < INTF_GAMMA_LIMIT) )
 477         {
 478             vlc_mutex_lock( &p_intf->p_vout->change_lock );
 479             p_intf->p_vout->f_gamma   += INTF_GAMMA_STEP;
 480             p_intf->p_vout->i_changes |= VOUT_GAMMA_CHANGE;
 481             vlc_mutex_unlock( &p_intf->p_vout->change_lock );
 482         }
 483         break;
 484     case INTF_KEY_TOGGLE_GRAYSCALE:                                            /* toggle grayscale */
 485         if( p_intf->p_vout != NULL )
 486         {
 487             vlc_mutex_lock( &p_intf->p_vout->change_lock );
 488             p_intf->p_vout->b_grayscale = !p_intf->p_vout->b_grayscale;
 489             p_intf->p_vout->i_changes  |= VOUT_GRAYSCALE_CHANGE;
 490             vlc_mutex_unlock( &p_intf->p_vout->change_lock );
 491         }
 492         break;
 493     case INTF_KEY_TOGGLE_INTERFACE:                                            /* toggle interface */
 494         if( p_intf->p_vout != NULL )
 495         {
 496             vlc_mutex_lock( &p_intf->p_vout->change_lock );
 497             p_intf->p_vout->b_interface     = !p_intf->p_vout->b_interface;
 498             p_intf->p_vout->i_changes |= VOUT_INTF_CHANGE;
 499             vlc_mutex_unlock( &p_intf->p_vout->change_lock );
 500         }
 501         break;
 502     case INTF_KEY_TOGGLE_INFO:                                                 /* toggle info */
 503         if( p_intf->p_vout != NULL )
 504         {
 505             vlc_mutex_lock( &p_intf->p_vout->change_lock );
 506             p_intf->p_vout->b_info     = !p_intf->p_vout->b_info;
 507             p_intf->p_vout->i_changes |= VOUT_INFO_CHANGE;
 508             vlc_mutex_unlock( &p_intf->p_vout->change_lock );
 509         }
 510         break;
 511     case INTF_KEY_TOGGLE_SCALING:                                              /* toggle scaling */
 512         if( p_intf->p_vout != NULL )
 513         {
 514             vlc_mutex_lock( &p_intf->p_vout->change_lock );
 515             p_intf->p_vout->b_scale    = !p_intf->p_vout->b_scale;
 516             p_intf->p_vout->i_changes |= VOUT_SCALE_CHANGE;
 517             vlc_mutex_unlock( &p_intf->p_vout->change_lock );
 518         }
 519         break;
 520    default:                                                   /* unknown key */
 521         return( 1 );
 522     }
 523
 524     return( 0 );
 525 }
 526
 527 /* following functions are local */
 528
 529 /*****************************************************************************
 530  * LoadChannels: load channels description from a file
 531  *****************************************************************************
 532  * This structe describes all interface-specific data of the main (interface)
 533  * thread.
 534  * Each line of the file is a semicolon separated list of the following
 535  * fields :
 536  *      integer         channel number
 537  *      string          channel description
 538  *      integer         input method (see input.h)
 539  *      string          input source
 540  *      integer         input port
 541  *      integer         input vlan
 542  * The last field must end with a semicolon.
 543  * Comments and empty lines are not explicitely allowed, but lines with parsing
 544  * errors are ignored without warning.
 545  *****************************************************************************/
 546 static int LoadChannels( intf_thread_t *p_intf, char *psz_filename )
 547 {
 548     FILE *              p_file;                                      /* file */
 549     intf_channel_t *    p_channel;                        /* current channel */
 550     char                psz_line[INTF_MAX_CMD_SIZE];          /* line buffer */
 551     int                 i_index;                   /* channel or field index */
 552
 553     /* Set default value */
 554     p_intf->p_channel = NULL;
 555
 556     /* FIXME: channels are disabled */
 557     //return( 0 );
 558
 559     /* Open file */
 560     p_file = fopen( psz_filename, "r" );
 561     if( p_file == NULL )
 562     {
 563         intf_ErrMsg("error: can't open %s (%s)\n", psz_filename, strerror(errno));
 564         return( 1 );
 565     }
 566
 567     /* First pass: count number of lines */
 568     for( i_index = 0; fgets( psz_line, INTF_MAX_CMD_SIZE, p_file ) != NULL; i_index++ )
 569     {
 570         ;
 571     }
 572
 573     if( i_index != 0 )
 574     {
 575         /* Allocate array and rewind - some of the lines may be invalid, and the
 576          * array will probably be larger than the actual number of channels, but
 577          * it has no consequence. */
 578         p_intf->p_channel = malloc( sizeof( intf_channel_t ) * i_index );
 579         if( p_intf->p_channel == NULL )
 580         {
 581             intf_ErrMsg("error: %s\n", strerror(ENOMEM));
 582             fclose( p_file );
 583             return( 1 );
 584         }
 585         p_channel = p_intf->p_channel;
 586         rewind( p_file );
 587
 588         /* Second pass: read channels descriptions */
 589         while( fgets( psz_line, INTF_MAX_CMD_SIZE, p_file ) != NULL )
 590         {
 591             if( !ParseChannel( p_channel, psz_line ) )
 592             {
 593                 intf_DbgMsg( "channel [%d] %s : method %d (%s:%d vlan %d)\n",
 594                          p_channel->i_channel, p_channel->psz_description,
 595                          p_channel->i_input_method,
 596                          p_channel->psz_input_source,
 597                          p_channel->i_input_port, p_channel->i_input_vlan );
 598                 p_channel++;
 599             }
 600         }
 601
 602         /* Add marker at the end of the array */
 603         p_channel->i_channel = -1;
 604     }
 605
 606     /* Close file */
 607     fclose( p_file );
 608     return( 0 );
 609 }
 610
 611 /*****************************************************************************
 612  * UnloadChannels: unload channels description
 613  *****************************************************************************
 614  * This function free all resources allocated by LoadChannels, if any.
 615  *****************************************************************************/
 616 static void UnloadChannels( intf_thread_t *p_intf )
 617 {
 618     int i_channel;                                          /* channel index */
 619
 620     if( p_intf->p_channel != NULL )
 621     {
 622         /* Free allocated strings */
 623         for( i_channel = 0;
 624              p_intf->p_channel[ i_channel ].i_channel != -1;
 625              i_channel++ )
 626         {
 627             if( p_intf->p_channel[ i_channel ].psz_description != NULL )
 628             {
 629                 free( p_intf->p_channel[ i_channel ].psz_description );
 630             }
 631             if( p_intf->p_channel[ i_channel ].psz_input_source != NULL )
 632             {
 633                 free( p_intf->p_channel[ i_channel ].psz_input_source );
 634             }
 635         }
 636
 637         /* Free array */
 638         free( p_intf->p_channel );
 639         p_intf->p_channel = NULL;
 640     }
 641 }
 642
 643
 644 /*****************************************************************************
 645  * ParseChannel: parse a channel description line
 646  *****************************************************************************
 647  * See LoadChannels. This function return non 0 on parsing error.
 648  *****************************************************************************/
 649 static int ParseChannel( intf_channel_t *p_channel, char *psz_str )
 650 {
 651     char *      psz_index;                              /* current character */
 652     char *      psz_end;                           /* end pointer for strtol */
 653     int         i_field;                        /* field number, -1 on error */
 654     int         i_field_length;             /* field length, for text fields */
 655
 656     /* Set some default fields */
 657     p_channel->i_channel =              0;
 658     p_channel->psz_description =        NULL;
 659     p_channel->i_input_method =         0;
 660     p_channel->psz_input_source =       NULL;
 661     p_channel->i_input_port =           0;
 662     p_channel->i_input_vlan =           0;
 663
 664     /* Parse string */
 665     i_field = 0;
 666     for( psz_index = psz_str; (i_field != -1) && (*psz_index != '\0'); psz_index++ )
 667     {
 668         if( *psz_index == ';' )
 669         {
 670             /* Mark end of field */
 671             *psz_index = '\0';
 672
 673             /* Parse field */
 674             switch( i_field++ )
 675             {
 676             case 0:                                        /* channel number */
 677                 p_channel->i_channel = strtol( psz_str, &psz_end, 0);
 678                 if( (*psz_str == '\0') || (*psz_end != '\0') )
 679                 {
 680                     i_field = -1;
 681                 }
 682                 break;
 683             case 1:                                   /* channel description */
 684                 i_field_length = strlen( psz_str );
 685                 if( i_field_length != 0 )
 686                 {
 687                     p_channel->psz_description = malloc( i_field_length + 1 );
 688                     if( p_channel->psz_description == NULL )
 689                     {
 690                         intf_ErrMsg("error: %s\n", strerror( ENOMEM ));
 691                         i_field = -1;
 692                     }
 693                     else
 694                     {
 695                         strcpy( p_channel->psz_description, psz_str );
 696                     }
 697                 }
 698                 break;
 699             case 2:                                          /* input method */
 700                 p_channel->i_input_method = strtol( psz_str, &psz_end, 0);
 701                 if( (*psz_str == '\0') || (*psz_end != '\0') )
 702                 {
 703                     i_field = -1;
 704                 }
 705                 break;
 706             case 3:                                          /* input source */
 707                 i_field_length = strlen( psz_str );
 708                 if( i_field_length != 0 )
 709                 {
 710                     p_channel->psz_input_source = malloc( i_field_length + 1 );
 711                     if( p_channel->psz_input_source == NULL )
 712                     {
 713                         intf_ErrMsg("error: %s\n", strerror( ENOMEM ));
 714                         i_field = -1;
 715                     }
 716                     else
 717                     {
 718                         strcpy( p_channel->psz_input_source, psz_str );
 719                     }
 720                 }
 721                 break;
 722             case 4:                                            /* input port */
 723                 p_channel->i_input_port = strtol( psz_str, &psz_end, 0);
 724                 if( (*psz_str == '\0') || (*psz_end != '\0') )
 725                 {
 726                     i_field = -1;
 727                 }
 728                 break;
 729             case 5:                                            /* input vlan */
 730                 p_channel->i_channel = strtol( psz_str, &psz_end, 0);
 731                 if( (*psz_str == '\0') || (*psz_end != '\0') )
 732                 {
 733                     i_field = -1;
 734                 }
 735                 break;
 736                 /* ... following fields are ignored */
 737             }
 738
 739             /* Set new beginning of field */
 740             psz_str = psz_index + 1;
 741         }
 742     }
 743
 744     /* At least the first three fields must be parsed sucessfully for function
 745      * success. Other parsing errors are returned using i_field = -1. */
 746     if( i_field < 3 )
 747     {
 748         /* Function fails. Free allocated strings */
 749         if( p_channel->psz_description != NULL )
 750         {
 751             free( p_channel->psz_description );
 752         }
 753         if( p_channel->psz_input_source != NULL )
 754         {
 755             free( p_channel->psz_input_source );
 756         }
 757         return( 1 );
 758     }
 759
 760     /* Return success */
 761     return( 0 );
 762 }