git.sesse.net Git - vlc/blob - modules/access/dvb/scan.c

   1 /*****************************************************************************
   2  * scan.c: DVB scanner helpers
   3  *****************************************************************************
   4  * Copyright (C) 2008 the VideoLAN team
   5  *
   6  * Authors: Laurent Aimar <fenrir@videolan.org>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  21  *****************************************************************************/
  22
  23 /*****************************************************************************
  24  * Preamble
  25  *****************************************************************************/
  26 #ifdef HAVE_CONFIG_H
  27 # include "config.h"
  28 #endif
  29
  30 #include <vlc_common.h>
  31 #include <vlc_plugin.h>
  32 #include <vlc_access.h>
  33 #include <vlc_dialog.h>
  34
  35 #ifdef HAVE_UNISTD_H
  36 #   include <unistd.h>
  37 #endif
  38
  39 #include <fcntl.h>
  40 #include <sys/types.h>
  41 #include <sys/poll.h>
  42
  43 #include <errno.h>
  44
  45 /* Include dvbpsi headers */
  46 #ifdef HAVE_DVBPSI_DR_H
  47 #   include <dvbpsi/dvbpsi.h>
  48 #   include <dvbpsi/descriptor.h>
  49 #   include <dvbpsi/pat.h>
  50 #   include <dvbpsi/pmt.h>
  51 #   include <dvbpsi/dr.h>
  52 #   include <dvbpsi/psi.h>
  53 #   include <dvbpsi/demux.h>
  54 #   include <dvbpsi/sdt.h>
  55 #else
  56 #   include "dvbpsi.h"
  57 #   include "descriptor.h"
  58 #   include "tables/pat.h"
  59 #   include "tables/pmt.h"
  60 #   include "descriptors/dr.h"
  61 #   include "psi.h"
  62 #   include "demux.h"
  63 #   include "tables/sdt.h"
  64 #endif
  65
  66 #ifdef ENABLE_HTTPD
  67 #   include "vlc_httpd.h"
  68 #endif
  69
  70 #include "dvb.h"
  71
  72 /* */
  73 scan_service_t *scan_service_New( int i_program, const scan_configuration_t *p_cfg  )
  74 {
  75     scan_service_t *p_srv = malloc( sizeof(*p_srv) );
  76     if( !p_srv )
  77         return NULL;
  78
  79     p_srv->i_program = i_program;
  80     p_srv->cfg = *p_cfg;
  81     p_srv->i_snr = -1;
  82
  83     p_srv->type = SERVICE_UNKNOWN;
  84     p_srv->psz_name = NULL;
  85     p_srv->i_channel = -1;
  86     p_srv->b_crypted = false;
  87
  88     p_srv->i_network_id = -1;
  89     p_srv->i_nit_version = -1;
  90     p_srv->i_sdt_version = -1;
  91
  92     return p_srv;
  93 }
  94
  95 void scan_service_Delete( scan_service_t *p_srv )
  96 {
  97     free( p_srv->psz_name );
  98     free( p_srv );
  99 }
 100
 101 /* */
 102 int scan_Init( vlc_object_t *p_obj, scan_t *p_scan, const scan_parameter_t *p_parameter )
 103 {
 104     if( p_parameter->type == SCAN_DVB_T )
 105     {
 106         msg_Dbg( p_obj, "DVB-T scanning:" );
 107         msg_Dbg( p_obj, " - frequency [%d, %d]",
 108                  p_parameter->frequency.i_min, p_parameter->frequency.i_max );
 109         msg_Dbg( p_obj, " - bandwidth [%d,%d]",
 110                  p_parameter->bandwidth.i_min, p_parameter->bandwidth.i_max );
 111         msg_Dbg( p_obj, " - exhaustive mode %s", p_parameter->b_exhaustive ? "on" : "off" );
 112     }
 113     else if( p_parameter->type == SCAN_DVB_C )
 114     {
 115         msg_Dbg( p_obj, "DVB-C scanning:" );
 116         msg_Dbg( p_obj, " - frequency [%d, %d]",
 117                  p_parameter->frequency.i_min, p_parameter->frequency.i_max );
 118         msg_Dbg( p_obj, " - bandwidth [%d,%d]",
 119                  p_parameter->bandwidth.i_min, p_parameter->bandwidth.i_max );
 120         msg_Dbg( p_obj, " - exhaustive mode %s", p_parameter->b_exhaustive ? "on" : "off" );
 121     }
 122     else
 123     {
 124         return VLC_EGENERIC;
 125     }
 126
 127     p_scan->p_obj = VLC_OBJECT(p_obj);
 128     p_scan->i_index = 0;
 129     p_scan->p_dialog = NULL;
 130     TAB_INIT( p_scan->i_service, p_scan->pp_service );
 131     p_scan->parameter = *p_parameter;
 132     p_scan->i_time_start = mdate();
 133
 134     return VLC_SUCCESS;
 135 }
 136 void scan_Clean( scan_t *p_scan )
 137 {
 138     if( p_scan->p_dialog != NULL )
 139         dialog_ProgressDestroy( p_scan->p_dialog );
 140
 141     for( int i = 0; i < p_scan->i_service; i++ )
 142         scan_service_Delete( p_scan->pp_service[i] );
 143     TAB_CLEAN( p_scan->i_service, p_scan->pp_service );
 144 }
 145
 146 static int ScanDvbCNextFast( scan_t *p_scan, scan_configuration_t *p_cfg, double *pf_pos )
 147 {
 148     msg_Dbg( p_scan->p_obj, "Scan index %"PRId64, p_scan->i_index );
 149     if( p_scan->i_index <= ( 10 ) )
 150     {
 151         p_cfg->i_frequency = 100500000 + ( ( p_scan->i_index ) * 700000);
 152     }
 153     else if ( p_scan->i_index <= (10 + 9  ) )
 154     {
 155         p_cfg->i_frequency = 97000000 + ( ( p_scan->i_index - 20 ) * 800000);
 156     }
 157     else if ( p_scan->i_index <= (38 + 17 ) )
 158     {
 159         p_cfg->i_frequency = 14250000 + ( ( p_scan->i_index - 33 ) * 700000);
 160     }
 161     else if ( p_scan->i_index <= (72 + (90-21) ) )
 162     {
 163         p_cfg->i_frequency = 13800000 + ( ( p_scan->i_index - (72 + 21 ) )  * 800000);
 164     }
 165     else
 166     {
 167         return VLC_EGENERIC;
 168     }
 169     *pf_pos = (double)p_scan->i_index / ( (90-21+22-5+10+9));
 170     return VLC_SUCCESS;
 171
 172 }
 173
 174 static int ScanDvbTNextExhaustive( scan_t *p_scan, scan_configuration_t *p_cfg, double *pf_pos )
 175 {
 176     if( p_scan->i_index > p_scan->parameter.frequency.i_count * p_scan->parameter.bandwidth.i_count )
 177         return VLC_EGENERIC;
 178
 179     const int i_bi = p_scan->i_index % p_scan->parameter.bandwidth.i_count;
 180     const int i_fi = p_scan->i_index / p_scan->parameter.bandwidth.i_count;
 181
 182     p_cfg->i_frequency = p_scan->parameter.frequency.i_min + i_fi * p_scan->parameter.frequency.i_step;
 183     p_cfg->i_bandwidth = p_scan->parameter.bandwidth.i_min + i_bi * p_scan->parameter.bandwidth.i_step;
 184
 185     *pf_pos = (double)p_scan->i_index / p_scan->parameter.frequency.i_count;
 186     return VLC_SUCCESS;
 187 }
 188
 189 static int ScanDvbTNextFast( scan_t *p_scan, scan_configuration_t *p_cfg, double *pf_pos )
 190 {
 191     static const int i_band_count = 2;
 192     static const struct
 193     {
 194         const char *psz_name;
 195         int i_min;
 196         int i_max;
 197     }
 198     band[2] =
 199     {
 200         { "VHF", 174, 230 },
 201         { "UHF", 470, 862 },
 202     };
 203     const int i_offset_count = 5;
 204     const int i_mhz = 1000000;
 205
 206     /* We will probe the whole band divided in all bandwidth possibility trying
 207      * i_offset_count offset around the position
 208      */
 209     for( ;; p_scan->i_index++ )
 210     {
 211
 212         const int i_bi = p_scan->i_index % p_scan->parameter.bandwidth.i_count;
 213         const int i_oi = (p_scan->i_index / p_scan->parameter.bandwidth.i_count) % i_offset_count;
 214         const int i_fi = (p_scan->i_index / p_scan->parameter.bandwidth.i_count) / i_offset_count;
 215
 216         const int i_bandwidth = p_scan->parameter.bandwidth.i_min + i_bi * p_scan->parameter.bandwidth.i_step;
 217         int i;
 218
 219         for( i = 0; i < i_band_count; i++ )
 220         {
 221             if( i_fi >= band[i].i_min && i_fi <= band[i].i_max )
 222                 break;
 223         }
 224         if( i >=i_band_count )
 225         {
 226             if( i_fi > band[i_band_count-1].i_max )
 227                 return VLC_EGENERIC;
 228             continue;
 229         }
 230
 231         const int i_frequency_min = band[i].i_min*i_mhz + i_bandwidth*i_mhz/2;
 232         const int i_frequency_base = i_fi*i_mhz;
 233
 234         if( i_frequency_base >= i_frequency_min && ( i_frequency_base - i_frequency_min ) % ( i_bandwidth*i_mhz ) == 0 )
 235         {
 236             const int i_frequency = i_frequency_base + ( i_oi - i_offset_count/2 ) * p_scan->parameter.frequency.i_step;
 237
 238             if( i_frequency < p_scan->parameter.frequency.i_min ||
 239                 i_frequency > p_scan->parameter.frequency.i_max )
 240                 continue;
 241
 242             p_cfg->i_frequency = i_frequency;
 243             p_cfg->i_bandwidth = i_bandwidth;
 244
 245             int i_current = 0, i_total = 0;
 246             for( int i = 0; i < i_band_count; i++ )
 247             {
 248                 const int i_frag = band[i].i_max-band[i].i_min;
 249
 250                 if( i_fi >= band[i].i_min )
 251                     i_current += __MIN( i_fi - band[i].i_min, i_frag );
 252                 i_total += i_frag;
 253             }
 254
 255             *pf_pos = (double)( i_current + (double)i_oi / i_offset_count ) / i_total;
 256             return VLC_SUCCESS;
 257         }
 258     }
 259 }
 260
 261 static int ScanDvbCNext( scan_t *p_scan, scan_configuration_t *p_cfg, double *pf_pos )
 262 {
 263     if( p_scan->parameter.b_exhaustive )
 264         return ScanDvbTNextExhaustive( p_scan, p_cfg, pf_pos );
 265     else
 266         return ScanDvbCNextFast( p_scan, p_cfg, pf_pos );
 267 }
 268
 269 static int ScanDvbTNext( scan_t *p_scan, scan_configuration_t *p_cfg, double *pf_pos )
 270 {
 271     if( p_scan->parameter.b_exhaustive )
 272         return ScanDvbTNextExhaustive( p_scan, p_cfg, pf_pos );
 273     else
 274         return ScanDvbTNextFast( p_scan, p_cfg, pf_pos );
 275 }
 276
 277 int scan_Next( scan_t *p_scan, scan_configuration_t *p_cfg )
 278 {
 279     double f_position;
 280     int i_ret;
 281
 282     if( scan_IsCancelled( p_scan ) )
 283         return VLC_EGENERIC;
 284
 285     memset( p_cfg, 0, sizeof(*p_cfg) );
 286     switch( p_scan->parameter.type )
 287     {
 288     case SCAN_DVB_T:
 289         i_ret = ScanDvbTNext( p_scan, p_cfg, &f_position );
 290         break;
 291     case SCAN_DVB_C:
 292         i_ret = ScanDvbCNext( p_scan, p_cfg, &f_position );
 293         break;
 294     default:
 295         i_ret = VLC_EGENERIC;
 296         break;
 297     }
 298
 299     if( i_ret )
 300         return i_ret;
 301
 302     char *psz_text;
 303     int i_service = 0;
 304
 305     for( int i = 0; i < p_scan->i_service; i++ )
 306     {
 307         if( p_scan->pp_service[i]->type != SERVICE_UNKNOWN )
 308             i_service++;
 309     }
 310
 311     if( asprintf( &psz_text, _("%.1f MHz (%d services)"),
 312                   (double)p_cfg->i_frequency / 1000000, i_service ) >= 0 )
 313     {
 314         const mtime_t i_eta = f_position > 0.005 ? (mdate() - p_scan->i_time_start) * ( 1.0 / f_position - 1.0 ) : -1;
 315         char psz_eta[MSTRTIME_MAX_SIZE];
 316
 317         if( i_eta >= 0 )
 318             msg_Info( p_scan->p_obj, "Scan ETA %s | %f", secstotimestr( psz_eta, i_eta/1000000 ), f_position * 100 );
 319
 320         if( p_scan->p_dialog == NULL )
 321             p_scan->p_dialog = dialog_ProgressCreate( p_scan->p_obj, _("Scanning DVB-T"), psz_text, _("Cancel") );
 322         if( p_scan->p_dialog != NULL )
 323             /* FIXME: update text, not just percentage */
 324             dialog_ProgressSet( p_scan->p_dialog, /*psz_text, */100 * f_position );
 325         free( psz_text );
 326     }
 327
 328     p_scan->i_index++;
 329     return VLC_SUCCESS;
 330 }
 331
 332 bool scan_IsCancelled( scan_t *p_scan )
 333 {
 334     return p_scan->p_dialog && dialog_ProgressCancelled( p_scan->p_dialog );
 335 }
 336
 337 static scan_service_t *ScanFindService( scan_t *p_scan, int i_service_start, int i_program )
 338 {
 339     for( int i = i_service_start; i < p_scan->i_service; i++ )
 340     {
 341         if( p_scan->pp_service[i]->i_program == i_program )
 342             return p_scan->pp_service[i];
 343     }
 344     return NULL;
 345 }
 346
 347 /* FIXME handle properly string (convert to utf8) */
 348 static void PATCallBack( scan_session_t *p_session, dvbpsi_pat_t *p_pat )
 349 {
 350     vlc_object_t *p_obj = p_session->p_obj;
 351
 352     msg_Dbg( p_obj, "PATCallBack" );
 353
 354     /* */
 355     if( p_session->p_pat && p_session->p_pat->b_current_next )
 356     {
 357         dvbpsi_DeletePAT( p_session->p_pat );
 358         p_session->p_pat = NULL;
 359     }
 360     if( p_session->p_pat )
 361     {
 362         dvbpsi_DeletePAT( p_pat );
 363         return;
 364     }
 365
 366     dvbpsi_pat_program_t *p_program;
 367
 368     /* */
 369     p_session->p_pat = p_pat;
 370
 371     /* */
 372     msg_Dbg( p_obj, "new PAT ts_id=%d version=%d current_next=%d",
 373              p_pat->i_ts_id, p_pat->i_version, p_pat->b_current_next );
 374     for( p_program = p_pat->p_first_program; p_program != NULL; p_program = p_program->p_next )
 375     {
 376         msg_Dbg( p_obj, "  * number=%d pid=%d", p_program->i_number, p_program->i_pid );
 377         if( p_program->i_number == 0 )
 378             p_session->i_nit_pid = p_program->i_pid;
 379     }
 380 }
 381 static void SDTCallBack( scan_session_t *p_session, dvbpsi_sdt_t *p_sdt )
 382 {
 383     vlc_object_t *p_obj = p_session->p_obj;
 384
 385     msg_Dbg( p_obj, "SDTCallBack" );
 386
 387     if( p_session->p_sdt && p_session->p_sdt->b_current_next )
 388     {
 389         dvbpsi_DeleteSDT( p_session->p_sdt );
 390         p_session->p_sdt = NULL;
 391     }
 392     if( p_session->p_sdt )
 393     {
 394         dvbpsi_DeleteSDT( p_sdt );
 395         return;
 396     }
 397
 398     /* */
 399     p_session->p_sdt = p_sdt;
 400
 401     /* */
 402     msg_Dbg( p_obj, "new SDT ts_id=%d version=%d current_next=%d network_id=%d",
 403              p_sdt->i_ts_id, p_sdt->i_version, p_sdt->b_current_next,
 404              p_sdt->i_network_id );
 405
 406
 407     dvbpsi_sdt_service_t *p_srv;
 408     for( p_srv = p_sdt->p_first_service; p_srv; p_srv = p_srv->p_next )
 409     {
 410         dvbpsi_descriptor_t *p_dr;
 411
 412         msg_Dbg( p_obj, "  * service id=%d eit schedule=%d present=%d running=%d free_ca=%d",
 413                  p_srv->i_service_id, p_srv->b_eit_schedule,
 414                  p_srv->b_eit_present, p_srv->i_running_status,
 415                  p_srv->b_free_ca );
 416         for( p_dr = p_srv->p_first_descriptor; p_dr; p_dr = p_dr->p_next )
 417         {
 418             if( p_dr->i_tag == 0x48 )
 419             {
 420                 dvbpsi_service_dr_t *pD = dvbpsi_DecodeServiceDr( p_dr );
 421                 char str2[257];
 422
 423                 memcpy( str2, pD->i_service_name, pD->i_service_name_length );
 424                 str2[pD->i_service_name_length] = '\0';
 425
 426                 msg_Dbg( p_obj, "    - type=%d name=%s",
 427                          pD->i_service_type, str2 );
 428             }
 429             else
 430             {
 431                 msg_Dbg( p_obj, "    * dsc 0x%x", p_dr->i_tag );
 432             }
 433         }
 434     }
 435 }
 436
 437 #ifdef DVBPSI_USE_NIT
 438 static void NITCallBack( scan_session_t *p_session, dvbpsi_nit_t *p_nit )
 439 {
 440     vlc_object_t *p_obj = p_session->p_obj;
 441
 442     msg_Dbg( p_obj, "NITCallBack" );
 443     msg_Dbg( p_obj, "new NIT network_id=%d version=%d current_next=%d",
 444              p_nit->i_network_id, p_nit->i_version, p_nit->b_current_next );
 445
 446     /* */
 447     if( p_session->p_nit && p_session->p_nit->b_current_next )
 448     {
 449         dvbpsi_DeleteNIT( p_session->p_nit );
 450         p_session->p_nit = NULL;
 451     }
 452     if( p_session->p_nit )
 453     {
 454         dvbpsi_DeleteNIT( p_nit );
 455         return;
 456     }
 457
 458     /* */
 459     p_session->p_nit = p_nit;
 460
 461     dvbpsi_descriptor_t *p_dsc;
 462     for( p_dsc = p_nit->p_first_descriptor; p_dsc != NULL; p_dsc = p_dsc->p_next )
 463     {
 464         if( p_dsc->i_tag == 0x40 )
 465         {
 466             msg_Dbg( p_obj, "   * network name descriptor" );
 467             char str1[257];
 468
 469             memcpy( str1, p_dsc->p_data, p_dsc->i_length );
 470             str1[p_dsc->i_length] = '\0';
 471             msg_Dbg( p_obj, "       * name %s", str1 );
 472         }
 473         else if( p_dsc->i_tag == 0x4a )
 474         {
 475             msg_Dbg( p_obj, "   * linkage descriptor" );
 476             uint16_t i_ts_id = GetWBE( &p_dsc->p_data[0] );
 477             uint16_t i_on_id = GetWBE( &p_dsc->p_data[2] );
 478             uint16_t i_service_id = GetWBE( &p_dsc->p_data[4] );
 479             int i_linkage_type = p_dsc->p_data[6];
 480
 481             msg_Dbg( p_obj, "       * ts_id %d", i_ts_id );
 482             msg_Dbg( p_obj, "       * on_id %d", i_on_id );
 483             msg_Dbg( p_obj, "       * service_id %d", i_service_id );
 484             msg_Dbg( p_obj, "       * linkage_type %d", i_linkage_type );
 485         }
 486         else
 487         {
 488             msg_Dbg( p_obj, "   * dsc 0x%x", p_dsc->i_tag );
 489         }
 490     }
 491
 492     dvbpsi_nit_ts_t *p_ts;
 493     for( p_ts = p_nit->p_first_ts; p_ts != NULL; p_ts = p_ts->p_next )
 494     {
 495         msg_Dbg( p_obj, "   * ts ts_id=0x%x original_id=0x%x", p_ts->i_ts_id, p_ts->i_orig_network_id );
 496
 497         uint32_t i_private_data_id = 0;
 498         dvbpsi_descriptor_t *p_dsc;
 499         for( p_dsc = p_ts->p_first_descriptor; p_dsc != NULL; p_dsc = p_dsc->p_next )
 500         {
 501             if( p_dsc->i_tag == 0x41 )
 502             {
 503                 msg_Dbg( p_obj, "       * service list descriptor" );
 504                 for( int i = 0; i < p_dsc->i_length/3; i++ )
 505                 {
 506                     uint16_t i_service_id = GetWBE( &p_dsc->p_data[3*i+0] );
 507                     uint8_t  i_service_type = p_dsc->p_data[3*i+2];
 508                     msg_Dbg( p_obj, "           * service_id=%d type=%d", i_service_id, i_service_type );
 509                 }
 510             }
 511             else if( p_dsc->i_tag == 0x5a )
 512             {
 513                 dvbpsi_terr_deliv_sys_dr_t *p_t = dvbpsi_DecodeTerrDelivSysDr( p_dsc );
 514                 msg_Dbg( p_obj, "       * terrestrial delivery system" );
 515                 msg_Dbg( p_obj, "           * centre_frequency 0x%x", p_t->i_centre_frequency  );
 516                 msg_Dbg( p_obj, "           * bandwidth %d", 8 - p_t->i_bandwidth );
 517                 msg_Dbg( p_obj, "           * constellation %d", p_t->i_constellation );
 518                 msg_Dbg( p_obj, "           * hierarchy %d", p_t->i_hierarchy_information );
 519                 msg_Dbg( p_obj, "           * code_rate hp %d lp %d", p_t->i_code_rate_hp_stream, p_t->i_code_rate_lp_stream );
 520                 msg_Dbg( p_obj, "           * guard_interval %d", p_t->i_guard_interval );
 521                 msg_Dbg( p_obj, "           * transmission_mode %d", p_t->i_transmission_mode );
 522                 msg_Dbg( p_obj, "           * other_frequency_flag %d", p_t->i_other_frequency_flag );
 523             }
 524             else if( p_dsc->i_tag == 0x5f )
 525             {
 526                 msg_Dbg( p_obj, "       * private data specifier descriptor" );
 527                 i_private_data_id = GetDWBE( &p_dsc->p_data[0] );
 528                 msg_Dbg( p_obj, "           * value 0x%8.8x", i_private_data_id );
 529             }
 530             else if( i_private_data_id == 0x28 && p_dsc->i_tag == 0x83 )
 531             {
 532                 msg_Dbg( p_obj, "       * logical channel descriptor (EICTA)" );
 533                 for( int i = 0; i < p_dsc->i_length/4; i++ )
 534                 {
 535                     uint16_t i_service_id = GetWBE( &p_dsc->p_data[4*i+0] );
 536                     int i_channel_number = GetWBE( &p_dsc->p_data[4*i+2] ) & 0x3ff;
 537                     msg_Dbg( p_obj, "           * service_id=%d channel_number=%d", i_service_id, i_channel_number );
 538                 }
 539
 540             }
 541             else
 542             {
 543                 msg_Warn( p_obj, "       * dsc 0x%x", p_dsc->i_tag );
 544             }
 545         }
 546     }
 547 }
 548 #endif
 549
 550 static void PSINewTableCallBack( scan_session_t *p_session, dvbpsi_handle h, uint8_t  i_table_id, uint16_t i_extension )
 551 {
 552     if( i_table_id == 0x42 )
 553         dvbpsi_AttachSDT( h, i_table_id, i_extension, (dvbpsi_sdt_callback)SDTCallBack, p_session );
 554 #ifdef DVBPSI_USE_NIT
 555     else if( i_table_id == 0x40 )
 556         dvbpsi_AttachNIT( h, i_table_id, i_extension, (dvbpsi_nit_callback)NITCallBack, p_session );
 557 #endif
 558 }
 559
 560
 561 int scan_session_Init( vlc_object_t *p_obj, scan_session_t *p_session, const scan_configuration_t *p_cfg )
 562 {
 563     /* */
 564     memset( p_session, 0, sizeof(*p_session) );
 565     p_session->p_obj = p_obj;
 566     p_session->cfg = *p_cfg;
 567     p_session->i_snr = -1;
 568     p_session->pat = NULL;
 569     p_session->p_pat = NULL;
 570     p_session->i_nit_pid = -1;
 571     p_session->sdt = NULL;
 572     p_session->p_sdt = NULL;
 573 #ifdef DVBPSI_USE_NIT
 574     p_session->nit = NULL;
 575     p_session->p_nit = NULL;
 576 #endif
 577     return VLC_SUCCESS;
 578 }
 579
 580 void scan_session_Clean( scan_t *p_scan, scan_session_t *p_session )
 581 {
 582     const int i_service_start = p_scan->i_service;
 583
 584     dvbpsi_pat_t *p_pat = p_session->p_pat;
 585     dvbpsi_sdt_t *p_sdt = p_session->p_sdt;
 586
 587 #ifdef DVBPSI_USE_NIT
 588     dvbpsi_nit_t *p_nit = p_session->p_nit;
 589 #endif
 590
 591     if( p_pat )
 592     {
 593         /* Parse PAT */
 594         dvbpsi_pat_program_t *p_program;
 595         for( p_program = p_pat->p_first_program; p_program != NULL; p_program = p_program->p_next )
 596         {
 597             if( p_program->i_number == 0 )  /* NIT */
 598                 continue;
 599
 600             scan_service_t *s = scan_service_New( p_program->i_number, &p_session->cfg );
 601             TAB_APPEND( p_scan->i_service, p_scan->pp_service, s );
 602         }
 603     }
 604     /* Parse SDT */
 605     if( p_pat && p_sdt )
 606     {
 607         dvbpsi_sdt_service_t *p_srv;
 608         for( p_srv = p_sdt->p_first_service; p_srv; p_srv = p_srv->p_next )
 609         {
 610             scan_service_t *s = ScanFindService( p_scan, i_service_start, p_srv->i_service_id );
 611             dvbpsi_descriptor_t *p_dr;
 612
 613             if( s )
 614                 s->b_crypted = p_srv->b_free_ca;
 615
 616             for( p_dr = p_srv->p_first_descriptor; p_dr; p_dr = p_dr->p_next )
 617             {
 618                 if( p_dr->i_tag == 0x48 )
 619                 {
 620                     dvbpsi_service_dr_t *pD = dvbpsi_DecodeServiceDr( p_dr );
 621
 622                     if( s )
 623                     {
 624                         if( !s->psz_name )
 625                             s->psz_name = dvbsi_to_utf8( pD->i_service_name, pD->i_service_name_length );
 626
 627                         if( s->type == SERVICE_UNKNOWN )
 628                         {
 629                             switch( pD->i_service_type )
 630                             {
 631                             case 0x01: s->type = SERVICE_DIGITAL_TELEVISION; break;
 632                             case 0x02: s->type = SERVICE_DIGITAL_RADIO; break;
 633                             case 0x16: s->type = SERVICE_DIGITAL_TELEVISION_AC_SD; break;
 634                             case 0x19: s->type = SERVICE_DIGITAL_TELEVISION_AC_HD; break;
 635                             }
 636                         }
 637                     }
 638                 }
 639             }
 640         }
 641     }
 642
 643 #ifdef DVBPSI_USE_NIT
 644     /* Parse NIT */
 645     if( p_pat && p_nit )
 646     {
 647         dvbpsi_nit_ts_t *p_ts;
 648         for( p_ts = p_nit->p_first_ts; p_ts != NULL; p_ts = p_ts->p_next )
 649         {
 650             uint32_t i_private_data_id = 0;
 651             dvbpsi_descriptor_t *p_dsc;
 652
 653             if( p_ts->i_orig_network_id != p_nit->i_network_id || p_ts->i_ts_id != p_pat->i_ts_id )
 654                 continue;
 655
 656             for( p_dsc = p_ts->p_first_descriptor; p_dsc != NULL; p_dsc = p_dsc->p_next )
 657             {
 658                 if( p_dsc->i_tag == 0x5f )
 659                 {
 660                     i_private_data_id = GetDWBE( &p_dsc->p_data[0] );
 661                 }
 662                 else if( i_private_data_id == 0x28 && p_dsc->i_tag == 0x83 )
 663                 {
 664                     for( int i = 0; i < p_dsc->i_length/4; i++ )
 665                     {
 666                         uint16_t i_service_id = GetWBE( &p_dsc->p_data[4*i+0] );
 667                         int i_channel_number = GetWBE( &p_dsc->p_data[4*i+2] ) & 0x3ff;
 668
 669                         scan_service_t *s = ScanFindService( p_scan, i_service_start, i_service_id );
 670                         if( s && s->i_channel < 0 )
 671                             s->i_channel = i_channel_number;
 672                     }
 673                 }
 674             }
 675         }
 676     }
 677 #endif
 678
 679     /* */
 680     for( int i = i_service_start; i < p_scan->i_service; i++ )
 681     {
 682         scan_service_t *p_srv = p_scan->pp_service[i];
 683
 684         p_srv->i_snr = p_session->i_snr;
 685         if( p_sdt )
 686             p_srv->i_sdt_version = p_sdt->i_version;
 687 #ifdef DVBPSI_USE_NIT
 688         if( p_nit )
 689         {
 690             p_srv->i_network_id = p_nit->i_network_id;
 691             p_srv->i_nit_version = p_nit->i_version;
 692         }
 693 #endif
 694     }
 695
 696
 697     /* */
 698     if( p_session->pat )
 699         dvbpsi_DetachPAT( p_session->pat );
 700     if( p_session->p_pat )
 701         dvbpsi_DeletePAT( p_session->p_pat );
 702
 703     if( p_session->sdt )
 704         dvbpsi_DetachDemux( p_session->sdt );
 705     if( p_session->p_sdt )
 706         dvbpsi_DeleteSDT( p_session->p_sdt );
 707 #ifdef DVBPSI_USE_NIT
 708     if( p_session->nit )
 709         dvbpsi_DetachDemux( p_session->nit );
 710     if( p_session->p_nit )
 711         dvbpsi_DeleteNIT( p_session->p_nit );
 712 #endif
 713 }
 714
 715 static int ScanServiceCmp( const void *a, const void *b )
 716 {
 717     scan_service_t *sa = *(scan_service_t**)a;
 718     scan_service_t *sb = *(scan_service_t**)b;
 719
 720     if( sa->i_channel == sb->i_channel )
 721     {
 722         if( sa->psz_name && sb->psz_name )
 723             return strcmp( sa->psz_name, sb->psz_name );
 724         return 0;
 725     }
 726     if( sa->i_channel == -1 )
 727         return 1;
 728     else if( sb->i_channel == -1 )
 729         return -1;
 730
 731     if( sa->i_channel < sb->i_channel )
 732         return -1;
 733     else if( sa->i_channel > sb->i_channel )
 734         return 1;
 735     return 0;
 736 }
 737
 738 static block_t *BlockString( const char *psz )
 739 {
 740     block_t *p = block_Alloc( strlen(psz) );
 741     if( p )
 742         memcpy( p->p_buffer, psz, p->i_buffer );
 743     return p;
 744 }
 745
 746 block_t *scan_GetM3U( scan_t *p_scan )
 747 {
 748     vlc_object_t *p_obj = p_scan->p_obj;
 749     block_t *p_playlist = NULL;
 750
 751     if( p_scan->i_service <= 0 )
 752         return NULL;
 753
 754     /* */
 755     qsort( p_scan->pp_service, p_scan->i_service, sizeof(scan_service_t*), ScanServiceCmp );
 756
 757     /* */
 758     p_playlist = BlockString( "#EXTM3U\n\n" );/* */
 759
 760     for( int i = 0; i < p_scan->i_service; i++ )
 761     {
 762         scan_service_t *s = p_scan->pp_service[i];
 763
 764         if( s->type == SERVICE_UNKNOWN )
 765         {
 766             /* We should only select service that have been described by SDT */
 767             msg_Dbg( p_obj, "scan_GetM3U: ignoring service number %d", s->i_program );
 768             continue;
 769         }
 770
 771         const char *psz_type;
 772         switch( s->type )
 773         {
 774         case SERVICE_DIGITAL_TELEVISION:       psz_type = "Digital television"; break;
 775         case SERVICE_DIGITAL_TELEVISION_AC_SD: psz_type = "Digital television advanced codec SD"; break;
 776         case SERVICE_DIGITAL_TELEVISION_AC_HD: psz_type = "Digital television advanced codec HD"; break;
 777         case SERVICE_DIGITAL_RADIO:            psz_type = "Digital radio"; break;
 778         default:
 779             psz_type = "Unknown";
 780             break;
 781         }
 782         msg_Warn( p_obj, "scan_GetM3U: service number %d type '%s' name '%s' channel %d cypted=%d| network_id %d (nit:%d sdt:%d)| f=%d bw=%d snr=%d",
 783                   s->i_program, psz_type, s->psz_name, s->i_channel, s->b_crypted,
 784                   s->i_network_id, s->i_nit_version, s->i_sdt_version,
 785                   s->cfg.i_frequency, s->cfg.i_bandwidth, s->i_snr );
 786
 787         char *psz;
 788         if( asprintf( &psz, "#EXTINF:,,%s\n"
 789                         "#EXTVLCOPT:program=%d\n"
 790                         "dvb://frequency=%d:bandwidth=%d\n"
 791                         "\n",
 792                       s->psz_name && * s->psz_name ? s->psz_name : "Unknown",
 793                       s->i_program,
 794                       s->cfg.i_frequency, s->cfg.i_bandwidth ) < 0 )
 795             psz = NULL;
 796         if( psz )
 797         {
 798             block_t *p_block = BlockString( psz );
 799             if( p_block )
 800                 block_ChainAppend( &p_playlist, p_block );
 801         }
 802     }
 803
 804     return p_playlist ? block_ChainGather( p_playlist ) : NULL;
 805 }
 806
 807 bool scan_session_Push( scan_session_t *p_scan, block_t *p_block )
 808 {
 809     if( p_block->i_buffer < 188 || p_block->p_buffer[0] != 0x47 )
 810     {
 811         block_Release( p_block );
 812         return false;
 813     }
 814
 815     /* */
 816     const int i_pid = ( (p_block->p_buffer[1]&0x1f)<<8) | p_block->p_buffer[2];
 817     if( i_pid == 0x00 )
 818     {
 819         if( !p_scan->pat )
 820             p_scan->pat = dvbpsi_AttachPAT( (dvbpsi_pat_callback)PATCallBack, p_scan );
 821
 822         if( p_scan->pat )
 823             dvbpsi_PushPacket( p_scan->pat, p_block->p_buffer );
 824     }
 825     else if( i_pid == 0x11 )
 826     {
 827         if( !p_scan->sdt )
 828             p_scan->sdt = dvbpsi_AttachDemux( (dvbpsi_demux_new_cb_t)PSINewTableCallBack, p_scan );
 829
 830         if( p_scan->sdt )
 831             dvbpsi_PushPacket( p_scan->sdt, p_block->p_buffer );
 832     }
 833     else if( i_pid == p_scan->i_nit_pid )
 834     {
 835 #ifdef DVBPSI_USE_NIT
 836         if( !p_scan->nit )
 837             p_scan->nit = dvbpsi_AttachDemux( (dvbpsi_demux_new_cb_t)PSINewTableCallBack, p_scan );
 838
 839         if( p_scan->nit )
 840             dvbpsi_PushPacket( p_scan->nit, p_block->p_buffer );
 841 #endif
 842     }
 843
 844     block_Release( p_block );
 845
 846     return p_scan->p_pat && p_scan->p_sdt &&
 847 #ifdef DVBPSI_USE_NIT
 848         p_scan->p_nit;
 849 #else
 850         true;
 851 #endif
 852 }
 853
 854 void scan_service_SetSNR( scan_session_t *p_session, int i_snr )
 855 {
 856     p_session->i_snr = i_snr;
 857 }
 858