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