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
  35 #include "config.h"
  36 #include "common.h"
  37 #include "threads.h"
  38 #include "mtime.h"
  39 #include "plugins.h"
  40 #include "playlist.h"
  41
  42 #include "stream_control.h"
  43 #include "input_ext-intf.h"
  44
  45 #include "audio_output.h"
  46
  47 #include "intf_msg.h"
  48 #include "interface.h"
  49 #include "intf_cmd.h"
  50 #include "intf_console.h"
  51 #include "keystrokes.h"
  52
  53 #include "video.h"
  54 #include "video_output.h"
  55
  56 #include "main.h"
  57
  58 /*****************************************************************************
  59  * intf_channel_t: channel description
  60  *****************************************************************************
  61  * A 'channel' is a descriptor of an input method. It is used to switch easily
  62  * from source to source without having to specify the whole input thread
  63  * configuration. The channels array, stored in the interface thread object, is
  64  * loaded in intf_Create, and unloaded in intf_Destroy.
  65  *****************************************************************************/
  66 typedef struct intf_channel_s
  67 {
  68     /* Channel description */
  69     int         i_channel;            /* channel number, -1 for end of array */
  70     char *      psz_description;              /* channel description (owned) */
  71
  72     /* Input configuration */
  73     int         i_input_method;                   /* input method descriptor */
  74     char *      psz_input_source;                   /* source string (owned) */
  75     int         i_input_port;                                        /* port */
  76     int         i_input_vlan_id;                                  /* vlan id */
  77 } intf_channel_t;
  78
  79 /*****************************************************************************
  80  * Local prototypes
  81  *****************************************************************************/
  82 static int      LoadChannels    ( intf_thread_t *p_intf, char *psz_filename );
  83 static void     UnloadChannels  ( intf_thread_t *p_intf );
  84 static int      ParseChannel    ( intf_channel_t *p_channel, char *psz_str );
  85
  86 /*****************************************************************************
  87  * intf_Create: prepare interface before main loop
  88  *****************************************************************************
  89  * This function opens output devices and creates specific interfaces. It sends
  90  * its own error messages.
  91  *****************************************************************************/
  92 intf_thread_t* intf_Create( void )
  93 {
  94     intf_thread_t * p_intf;
  95     typedef void    ( intf_getplugin_t ) ( intf_thread_t * p_intf );
  96     int             i_index;
  97     int             i_best_index = 0, i_best_score = 0;
  98
  99     /* Allocate structure */
 100     p_intf = malloc( sizeof( intf_thread_t ) );
 101     if( !p_intf )
 102     {
 103         intf_ErrMsg("error: %s", strerror( ENOMEM ) );
 104         return( NULL );
 105     }
 106
 107     /* Get a suitable interface plugin */
 108     for( i_index = 0 ; i_index < p_main->p_bank->i_plugin_count ; i_index++ )
 109     {
 110         /* If there's a plugin in p_info ... */
 111         if( p_main->p_bank->p_info[ i_index ] != NULL )
 112         {
 113             /* ... and if this plugin provides the functions we want ... */
 114             if( p_main->p_bank->p_info[ i_index ]->intf_GetPlugin != NULL )
 115             {
 116                 /* ... and if this plugin has a good score ... */
 117                 if( p_main->p_bank->p_info[ i_index ]->i_score > i_best_score )
 118                 {
 119                     /* ... then take it */
 120                     i_best_score = p_main->p_bank->p_info[ i_index ]->i_score;
 121                     i_best_index = i_index;
 122                 }
 123             }
 124         }
 125     }
 126
 127     if( i_best_score == 0 )
 128     {
 129         free( p_intf );
 130         intf_ErrMsg( "error: no suitable plugin to create interface" );
 131         return( NULL );
 132     }
 133
 134     /* Get the plugin functions */
 135     ( (intf_getplugin_t *)
 136       p_main->p_bank->p_info[ i_best_index ]->intf_GetPlugin )( p_intf );
 137
 138     /* Initialize structure */
 139     p_intf->b_die =     0;
 140     p_intf->p_vout =    NULL;
 141     p_intf->p_input =   NULL;
 142     p_intf->p_keys =    NULL;
 143
 144     /* Warning level initialisation */
 145     p_intf->i_warning_level = main_GetIntVariable( INTF_WARNING_VAR, INTF_WARNING_DEFAULT );
 146
 147     /* Load channels - the pointer will be set to NULL on failure. The
 148      * return value is ignored since the program can work without
 149      * channels */
 150     LoadChannels( p_intf, main_GetPszVariable( INTF_CHANNELS_VAR, INTF_CHANNELS_DEFAULT ));
 151
 152     /* Start interfaces */
 153     p_intf->p_console = intf_ConsoleCreate();
 154     if( p_intf->p_console == NULL )
 155     {
 156         intf_ErrMsg("error: can't create control console");
 157         free( p_intf );
 158         return( NULL );
 159     }
 160     if( p_intf->p_sys_create( p_intf ) )
 161     {
 162         intf_ErrMsg("error: can't create interface");
 163         intf_ConsoleDestroy( p_intf->p_console );
 164         free( p_intf );
 165         return( NULL );
 166     }
 167
 168     intf_Msg("Interface initialized");
 169     return( p_intf );
 170 }
 171
 172 /*****************************************************************************
 173  * intf_Run
 174  *****************************************************************************
 175  * Initialization script and main interface loop.
 176  *****************************************************************************/
 177 void intf_Run( intf_thread_t *p_intf )
 178 {
 179     char * psz_server = main_GetPszVariable( INPUT_SERVER_VAR, NULL );
 180     input_config_t *    p_input_config;
 181
 182     /* Flush messages before spawning input */
 183     intf_FlushMsg();
 184
 185     /* If a server was specified */
 186     if( psz_server )
 187     {
 188         if( (p_input_config =
 189               (input_config_t *)malloc( sizeof(input_config_t) )) == NULL )
 190         {
 191             intf_ErrMsg("Out of memory");
 192         }
 193         else
 194         {
 195             p_input_config->i_method = INPUT_METHOD_UCAST;
 196             p_input_config->p_source = psz_server;
 197             p_input_config->p_default_aout = p_main->p_aout;
 198             p_input_config->p_default_vout = p_intf->p_vout;
 199
 200             p_intf->p_input = input_CreateThread( p_input_config, NULL );
 201         }
 202     }
 203     /* Or if a file was specified */
 204     else if( p_main->p_playlist->p_list != NULL )
 205     {
 206         if( (p_input_config =
 207               (input_config_t *)malloc( sizeof(input_config_t) )) == NULL )
 208         {
 209             intf_ErrMsg("Out of memory");
 210         }
 211         else
 212         {
 213             p_input_config->i_method = INPUT_METHOD_FILE;
 214             p_input_config->p_source = p_main->p_playlist->p_list[0]; /* FIXME ??? */
 215             p_input_config->p_default_aout = p_main->p_aout;
 216             p_input_config->p_default_vout = p_intf->p_vout;
 217
 218             p_intf->p_input = input_CreateThread( p_input_config, NULL );
 219         }
 220     }
 221     /* Execute the initialization script - if a positive number is returned,
 222      * the script could be executed but failed */
 223     else if( intf_ExecScript( main_GetPszVariable( INTF_INIT_SCRIPT_VAR, INTF_INIT_SCRIPT_DEFAULT ) ) > 0 )
 224     {
 225         intf_ErrMsg("warning: error(s) during startup script");
 226     }
 227
 228     /* Main loop */
 229     while(!p_intf->b_die)
 230     {
 231         /* Flush waiting messages */
 232         intf_FlushMsg();
 233
 234         /* Manage specific interface */
 235         p_intf->p_sys_manage( p_intf );
 236
 237         /* Check attached threads status */
 238         if( (p_intf->p_vout != NULL) && p_intf->p_vout->b_error )
 239         {
 240             /* FIXME: add aout error detection ?? */
 241             p_intf->b_die = 1;
 242         }
 243         if( (p_intf->p_input != NULL) && p_intf->p_input->b_error )
 244         {
 245             input_DestroyThread( p_intf->p_input, NULL );
 246             p_intf->p_input = NULL;
 247             intf_DbgMsg("Input thread destroyed");
 248         }
 249
 250         /* Sleep to avoid using all CPU - since some interfaces needs to access
 251          * keyboard events, a 100ms delay is a good compromise */
 252         msleep( INTF_IDLE_SLEEP );
 253     }
 254 }
 255
 256 /*****************************************************************************
 257  * intf_Destroy: clean interface after main loop
 258  *****************************************************************************
 259  * This function destroys specific interfaces and close output devices.
 260  *****************************************************************************/
 261 void intf_Destroy( intf_thread_t *p_intf )
 262 {
 263     p_intf_key  p_cur;
 264     p_intf_key  p_next;
 265     /* Destroy interfaces */
 266     p_intf->p_sys_destroy( p_intf );
 267     intf_ConsoleDestroy( p_intf->p_console );
 268
 269     /* Unload channels */
 270     UnloadChannels( p_intf );
 271
 272     /* Destroy keymap */
 273     p_cur = p_intf->p_keys;
 274     while( p_cur != NULL)
 275     {
 276         p_next = p_cur->next;
 277         free(p_cur);
 278         p_cur = p_next;
 279     }
 280
 281
 282         /* Free structure */
 283     free( p_intf );
 284 }
 285
 286 /*****************************************************************************
 287  * intf_SelectChannel: change channel
 288  *****************************************************************************
 289  * Kill existing input, if any, and try to open a new one, using an input
 290  * configuration table.
 291  *****************************************************************************/
 292 int intf_SelectChannel( intf_thread_t * p_intf, int i_channel )
 293 {
 294     /* FIXME */
 295 #if 0
 296     intf_channel_t *    p_channel;                                /* channel */
 297
 298     /* Look for channel in array */
 299     if( p_intf->p_channel != NULL )
 300     {
 301         for( p_channel = p_intf->p_channel; p_channel->i_channel != -1; p_channel++ )
 302         {
 303             if( p_channel->i_channel == i_channel )
 304             {
 305             /*
 306              * Change channel
 307              */
 308
 309             /* Kill existing input, if any */
 310             if( p_intf->p_input != NULL )
 311             {
 312                 input_DestroyThread( p_intf->p_input, NULL );
 313             }
 314
 315             intf_Msg("Channel %d: %s", i_channel, p_channel->psz_description );
 316
 317             /* Open a new input */
 318             p_intf->p_input = input_CreateThread( p_channel->i_input_method, p_channel->psz_input_source,
 319                                   p_channel->i_input_port, p_channel->i_input_vlan_id,
 320                                   p_intf->p_vout, p_main->p_aout, NULL );
 321             return( p_intf->p_input == NULL );
 322             }
 323         }
 324     }
 325
 326     /* Channel does not exist */
 327     intf_Msg("Channel %d does not exist", i_channel );
 328 #endif
 329     return( 1 );
 330 }
 331
 332 /*****************************************************************************
 333  * intf_AssignKey: assign standartkeys                                       *
 334  *****************************************************************************
 335  * This function fills in the associative array that links the key pressed   *
 336  * and the key we use internally. Support one extra parameter.               *
 337  ****************************************************************************/
 338 void intf_AssignKey( intf_thread_t *p_intf, int r_key, int f_key, int param)
 339 {
 340     p_intf_key  p_cur =  p_intf->p_keys;
 341     if( p_cur == NULL )
 342     {
 343         p_cur = (p_intf_key )(malloc ( sizeof( intf_key ) ) );
 344         p_cur->received_key = r_key;
 345         p_cur->forwarded.key = f_key;
 346         p_cur->forwarded.param = param;
 347         p_cur->next = NULL;
 348         p_intf->p_keys = p_cur;
 349     }
 350     else
 351     {
 352         while( p_cur->next != NULL && p_cur ->received_key != r_key)
 353         {
 354             p_cur = p_cur->next;
 355         }
 356         if( p_cur->next == NULL )
 357         {
 358             p_cur->next  = ( p_intf_key )( malloc( sizeof( intf_key ) ) );
 359             p_cur = p_cur->next;
 360             p_cur->next = NULL;
 361             p_cur->forwarded.param = param;
 362             p_cur->received_key = r_key;
 363         }
 364         p_cur->forwarded.key = f_key;
 365     }
 366 }
 367
 368 /* Basic getKey function... */
 369 keyparm intf_GetKey( intf_thread_t *p_intf, int r_key)
 370 {
 371     keyparm reply;
 372
 373     p_intf_key current = p_intf->p_keys;
 374     while(current != NULL && current->received_key != r_key)
 375     {
 376         current = current->next;
 377     }
 378     if(current == NULL)
 379     {   /* didn't find any key in the array */
 380         reply.key = INTF_KEY_UNKNOWN;
 381         reply.param = 0;
 382     }
 383     else
 384     {
 385         reply.key = current->forwarded.key;
 386         reply.param = current->forwarded.param;
 387     }
 388     return reply;
 389 }
 390
 391 /*****************************************************************************
 392 * intf_AssignNormalKeys: used for normal interfaces.
 393 *****************************************************************************
 394 * This function assign the basic key to the normal keys.
 395 *****************************************************************************/
 396
 397 void intf_AssignNormalKeys( intf_thread_t *p_intf)
 398 {
 399     p_intf->p_intf_get_key = intf_GetKey;
 400
 401     intf_AssignKey( p_intf , 'Q', INTF_KEY_QUIT, 0);
 402     intf_AssignKey( p_intf , 'q', INTF_KEY_QUIT, 0);
 403     intf_AssignKey( p_intf ,  27, INTF_KEY_QUIT, 0);
 404     intf_AssignKey( p_intf ,   3, INTF_KEY_QUIT, 0);
 405     intf_AssignKey( p_intf , '0', INTF_KEY_SET_CHANNEL, 0);
 406     intf_AssignKey( p_intf , '1', INTF_KEY_SET_CHANNEL, 1);
 407     intf_AssignKey( p_intf , '2', INTF_KEY_SET_CHANNEL, 2);
 408     intf_AssignKey( p_intf , '3', INTF_KEY_SET_CHANNEL, 3);
 409     intf_AssignKey( p_intf , '4', INTF_KEY_SET_CHANNEL, 4);
 410     intf_AssignKey( p_intf , '5', INTF_KEY_SET_CHANNEL, 5);
 411     intf_AssignKey( p_intf , '6', INTF_KEY_SET_CHANNEL, 6);
 412     intf_AssignKey( p_intf , '7', INTF_KEY_SET_CHANNEL, 7);
 413     intf_AssignKey( p_intf , '8', INTF_KEY_SET_CHANNEL, 8);
 414     intf_AssignKey( p_intf , '9', INTF_KEY_SET_CHANNEL, 9);
 415     intf_AssignKey( p_intf , '0', INTF_KEY_SET_CHANNEL, 0);
 416     intf_AssignKey( p_intf , '+', INTF_KEY_INC_VOLUME, 0);
 417     intf_AssignKey( p_intf , '-', INTF_KEY_DEC_VOLUME, 0);
 418     intf_AssignKey( p_intf , 'm', INTF_KEY_TOGGLE_VOLUME, 0);
 419     intf_AssignKey( p_intf , 'M', INTF_KEY_TOGGLE_VOLUME, 0);
 420     intf_AssignKey( p_intf , 'g', INTF_KEY_DEC_GAMMA, 0);
 421     intf_AssignKey( p_intf , 'G', INTF_KEY_INC_GAMMA, 0);
 422     intf_AssignKey( p_intf , 'c', INTF_KEY_TOGGLE_GRAYSCALE, 0);
 423     intf_AssignKey( p_intf , ' ', INTF_KEY_TOGGLE_INTERFACE, 0);
 424     intf_AssignKey( p_intf , 'i', INTF_KEY_TOGGLE_INFO, 0);
 425     intf_AssignKey( p_intf , 's', INTF_KEY_TOGGLE_SCALING, 0);
 426 }
 427
 428 /*****************************************************************************
 429  * intf_ProcessKey: process standard keys
 430  *****************************************************************************
 431  * This function will process standard keys and return non 0 if the key was
 432  * unknown.
 433  *****************************************************************************/
 434 int intf_ProcessKey( intf_thread_t *p_intf, int g_key )
 435 {
 436     static int i_volbackup;
 437     keyparm k_reply;
 438
 439     k_reply = intf_GetKey( p_intf, g_key);
 440
 441     switch( k_reply.key )
 442     {
 443     case INTF_KEY_QUIT:                                                  /* quit order */
 444         p_intf->b_die = 1;
 445         break;
 446     case INTF_KEY_SET_CHANNEL:
 447         /* Change channel - return code is ignored since SelectChannel displays
 448          * its own error messages */
 449         intf_SelectChannel( p_intf, k_reply.param );
 450         break;
 451     case INTF_KEY_INC_VOLUME:                                                    /* volume + */
 452         if( (p_main->p_aout != NULL) && (p_main->p_aout->vol < VOLUME_MAX) )
 453             p_main->p_aout->vol += VOLUME_STEP;
 454         break;
 455     case INTF_KEY_DEC_VOLUME:                                                    /* volume - */
 456         if( (p_main->p_aout != NULL) && (p_main->p_aout->vol > VOLUME_STEP) )
 457             p_main->p_aout->vol -= VOLUME_STEP;
 458         break;
 459     case INTF_KEY_TOGGLE_VOLUME:                                                 /* toggle mute */
 460         if( (p_main->p_aout != NULL) && (p_main->p_aout->vol))
 461         {
 462             i_volbackup = p_main->p_aout->vol;
 463             p_main->p_aout->vol = 0;
 464         }
 465         else if( (p_main->p_aout != NULL) && (!p_main->p_aout->vol))
 466             p_main->p_aout->vol = i_volbackup;
 467         break;
 468     case INTF_KEY_DEC_GAMMA:                                                     /* gamma - */
 469         if( (p_intf->p_vout != NULL) && (p_intf->p_vout->f_gamma > -INTF_GAMMA_LIMIT) )
 470         {
 471             vlc_mutex_lock( &p_intf->p_vout->change_lock );
 472             p_intf->p_vout->f_gamma   -= INTF_GAMMA_STEP;
 473             p_intf->p_vout->i_changes |= VOUT_GAMMA_CHANGE;
 474             vlc_mutex_unlock( &p_intf->p_vout->change_lock );
 475         }
 476         break;
 477     case INTF_KEY_INC_GAMMA:                                                     /* gamma + */
 478         if( (p_intf->p_vout != NULL) && (p_intf->p_vout->f_gamma < INTF_GAMMA_LIMIT) )
 479         {
 480             vlc_mutex_lock( &p_intf->p_vout->change_lock );
 481             p_intf->p_vout->f_gamma   += INTF_GAMMA_STEP;
 482             p_intf->p_vout->i_changes |= VOUT_GAMMA_CHANGE;
 483             vlc_mutex_unlock( &p_intf->p_vout->change_lock );
 484         }
 485         break;
 486     case INTF_KEY_TOGGLE_GRAYSCALE:                                            /* toggle grayscale */
 487         if( p_intf->p_vout != NULL )
 488         {
 489             vlc_mutex_lock( &p_intf->p_vout->change_lock );
 490             p_intf->p_vout->b_grayscale = !p_intf->p_vout->b_grayscale;
 491             p_intf->p_vout->i_changes  |= VOUT_GRAYSCALE_CHANGE;
 492             vlc_mutex_unlock( &p_intf->p_vout->change_lock );
 493         }
 494         break;
 495     case INTF_KEY_TOGGLE_INTERFACE:                                            /* toggle interface */
 496         if( p_intf->p_vout != NULL )
 497         {
 498             vlc_mutex_lock( &p_intf->p_vout->change_lock );
 499             p_intf->p_vout->b_interface     = !p_intf->p_vout->b_interface;
 500             p_intf->p_vout->i_changes |= VOUT_INTF_CHANGE;
 501             vlc_mutex_unlock( &p_intf->p_vout->change_lock );
 502         }
 503         break;
 504     case INTF_KEY_TOGGLE_INFO:                                                 /* toggle info */
 505         if( p_intf->p_vout != NULL )
 506         {
 507             vlc_mutex_lock( &p_intf->p_vout->change_lock );
 508             p_intf->p_vout->b_info     = !p_intf->p_vout->b_info;
 509             p_intf->p_vout->i_changes |= VOUT_INFO_CHANGE;
 510             vlc_mutex_unlock( &p_intf->p_vout->change_lock );
 511         }
 512         break;
 513     case INTF_KEY_TOGGLE_SCALING:                                              /* toggle scaling */
 514         if( p_intf->p_vout != NULL )
 515         {
 516             vlc_mutex_lock( &p_intf->p_vout->change_lock );
 517             p_intf->p_vout->b_scale    = !p_intf->p_vout->b_scale;
 518             p_intf->p_vout->i_changes |= VOUT_SCALE_CHANGE;
 519             vlc_mutex_unlock( &p_intf->p_vout->change_lock );
 520         }
 521         break;
 522    default:                                                   /* unknown key */
 523         return( 1 );
 524     }
 525
 526     return( 0 );
 527 }
 528
 529 /* following functions are local */
 530
 531 /*****************************************************************************
 532  * LoadChannels: load channels description from a file
 533  *****************************************************************************
 534  * This structe describes all interface-specific data of the main (interface)
 535  * thread.
 536  * Each line of the file is a semicolon separated list of the following
 537  * fields :
 538  *      integer         channel number
 539  *      string          channel description
 540  *      integer         input method (see input.h)
 541  *      string          input source
 542  *      integer         input port
 543  *      integer         input vlan id
 544  * The last field must end with a semicolon.
 545  * Comments and empty lines are not explicitely allowed, but lines with parsing
 546  * errors are ignored without warning.
 547  *****************************************************************************/
 548 static int LoadChannels( intf_thread_t *p_intf, char *psz_filename )
 549 {
 550     FILE *              p_file;                                      /* file */
 551     intf_channel_t *    p_channel;                        /* current channel */
 552     char                psz_line[INTF_MAX_CMD_SIZE];          /* line buffer */
 553     int                 i_index;                   /* channel or field index */
 554
 555     /* Set default value */
 556     p_intf->p_channel = NULL;
 557
 558     /* FIXME: channels are disabled */
 559     //return( 0 );
 560
 561     /* Open file */
 562     p_file = fopen( psz_filename, "r" );
 563     if( p_file == NULL )
 564     {
 565         intf_ErrMsg("error: can't open %s (%s)", psz_filename, strerror(errno));
 566         return( 1 );
 567     }
 568
 569     /* First pass: count number of lines */
 570     for( i_index = 0; fgets( psz_line, INTF_MAX_CMD_SIZE, p_file ) != NULL; i_index++ )
 571     {
 572         ;
 573     }
 574
 575     if( i_index != 0 )
 576     {
 577         /* Allocate array and rewind - some of the lines may be invalid, and the
 578          * array will probably be larger than the actual number of channels, but
 579          * it has no consequence. */
 580         p_intf->p_channel = malloc( sizeof( intf_channel_t ) * i_index );
 581         if( p_intf->p_channel == NULL )
 582         {
 583             intf_ErrMsg("error: %s", strerror(ENOMEM));
 584             fclose( p_file );
 585             return( 1 );
 586         }
 587         p_channel = p_intf->p_channel;
 588         rewind( p_file );
 589
 590         /* Second pass: read channels descriptions */
 591         while( fgets( psz_line, INTF_MAX_CMD_SIZE, p_file ) != NULL )
 592         {
 593             if( !ParseChannel( p_channel, psz_line ) )
 594             {
 595                 intf_DbgMsg( "channel [%d] %s : method %d (%s:%d vlan id %d)",
 596                          p_channel->i_channel, p_channel->psz_description,
 597                          p_channel->i_input_method,
 598                          p_channel->psz_input_source,
 599                          p_channel->i_input_port, p_channel->i_input_vlan_id );
 600                 p_channel++;
 601             }
 602         }
 603
 604         /* Add marker at the end of the array */
 605         p_channel->i_channel = -1;
 606     }
 607
 608     /* Close file */
 609     fclose( p_file );
 610     return( 0 );
 611 }
 612
 613 /*****************************************************************************
 614  * UnloadChannels: unload channels description
 615  *****************************************************************************
 616  * This function free all resources allocated by LoadChannels, if any.
 617  *****************************************************************************/
 618 static void UnloadChannels( intf_thread_t *p_intf )
 619 {
 620     int i_channel;                                          /* channel index */
 621
 622     if( p_intf->p_channel != NULL )
 623     {
 624         /* Free allocated strings */
 625         for( i_channel = 0;
 626              p_intf->p_channel[ i_channel ].i_channel != -1;
 627              i_channel++ )
 628         {
 629             if( p_intf->p_channel[ i_channel ].psz_description != NULL )
 630             {
 631                 free( p_intf->p_channel[ i_channel ].psz_description );
 632             }
 633             if( p_intf->p_channel[ i_channel ].psz_input_source != NULL )
 634             {
 635                 free( p_intf->p_channel[ i_channel ].psz_input_source );
 636             }
 637         }
 638
 639         /* Free array */
 640         free( p_intf->p_channel );
 641         p_intf->p_channel = NULL;
 642     }
 643 }
 644
 645
 646 /*****************************************************************************
 647  * ParseChannel: parse a channel description line
 648  *****************************************************************************
 649  * See LoadChannels. This function return non 0 on parsing error.
 650  *****************************************************************************/
 651 static int ParseChannel( intf_channel_t *p_channel, char *psz_str )
 652 {
 653     char *      psz_index;                              /* current character */
 654     char *      psz_end;                           /* end pointer for strtol */
 655     int         i_field;                        /* field number, -1 on error */
 656     int         i_field_length;             /* field length, for text fields */
 657
 658     /* Set some default fields */
 659     p_channel->i_channel =              0;
 660     p_channel->psz_description =        NULL;
 661     p_channel->i_input_method =         0;
 662     p_channel->psz_input_source =       NULL;
 663     p_channel->i_input_port =           0;
 664     p_channel->i_input_vlan_id =        0;
 665
 666     /* Parse string */
 667     i_field = 0;
 668     for( psz_index = psz_str; (i_field != -1) && (*psz_index != '\0'); psz_index++ )
 669     {
 670         if( *psz_index == ';' )
 671         {
 672             /* Mark end of field */
 673             *psz_index = '\0';
 674
 675             /* Parse field */
 676             switch( i_field++ )
 677             {
 678             case 0:                                        /* channel number */
 679                 p_channel->i_channel = strtol( psz_str, &psz_end, 0);
 680                 if( (*psz_str == '\0') || (*psz_end != '\0') )
 681                 {
 682                     i_field = -1;
 683                 }
 684                 break;
 685             case 1:                                   /* channel description */
 686                 i_field_length = strlen( psz_str );
 687                 if( i_field_length != 0 )
 688                 {
 689                     p_channel->psz_description = malloc( i_field_length + 1 );
 690                     if( p_channel->psz_description == NULL )
 691                     {
 692                         intf_ErrMsg("error: %s", strerror( ENOMEM ));
 693                         i_field = -1;
 694                     }
 695                     else
 696                     {
 697                         strcpy( p_channel->psz_description, psz_str );
 698                     }
 699                 }
 700                 break;
 701             case 2:                                          /* input method */
 702                 p_channel->i_input_method = strtol( psz_str, &psz_end, 0);
 703                 if( (*psz_str == '\0') || (*psz_end != '\0') )
 704                 {
 705                     i_field = -1;
 706                 }
 707                 break;
 708             case 3:                                          /* input source */
 709                 i_field_length = strlen( psz_str );
 710                 if( i_field_length != 0 )
 711                 {
 712                     p_channel->psz_input_source = malloc( i_field_length + 1 );
 713                     if( p_channel->psz_input_source == NULL )
 714                     {
 715                         intf_ErrMsg("error: %s", strerror( ENOMEM ));
 716                         i_field = -1;
 717                     }
 718                     else
 719                     {
 720                         strcpy( p_channel->psz_input_source, psz_str );
 721                     }
 722                 }
 723                 break;
 724             case 4:                                            /* input port */
 725                 p_channel->i_input_port = strtol( psz_str, &psz_end, 0);
 726                 if( (*psz_str == '\0') || (*psz_end != '\0') )
 727                 {
 728                     i_field = -1;
 729                 }
 730                 break;
 731             case 5:                                          /* input vlan id */
 732                 p_channel->i_input_vlan_id = strtol( psz_str, &psz_end, 0);
 733                 if( (*psz_str == '\0') || (*psz_end != '\0') )
 734                 {
 735                     i_field = -1;
 736                 }
 737                 break;
 738                 /* ... following fields are ignored */
 739             }
 740
 741             /* Set new beginning of field */
 742             psz_str = psz_index + 1;
 743         }
 744     }
 745
 746     /* At least the first three fields must be parsed sucessfully for function
 747      * success. Other parsing errors are returned using i_field = -1. */
 748     if( i_field < 3 )
 749     {
 750         /* Function fails. Free allocated strings */
 751         if( p_channel->psz_description != NULL )
 752         {
 753             free( p_channel->psz_description );
 754         }
 755         if( p_channel->psz_input_source != NULL )
 756         {
 757             free( p_channel->psz_input_source );
 758         }
 759         return( 1 );
 760     }
 761
 762     /* Return success */
 763     return( 0 );
 764 }