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