git.sesse.net Git - vlc/blob - src/control/core.c

   1 /*****************************************************************************
   2  * core.c: Core functions : init, playlist, stream management
   3  *****************************************************************************
   4  * Copyright (C) 2005 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Olivier Aubert <olivier.aubert@liris.univ-lyon1.fr>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
  22  *****************************************************************************/
  23
  24 #include <vlc/control.h>
  25
  26 #include <vlc/intf.h>
  27 #include <vlc/vout.h>
  28 #include <vlc/aout.h>
  29 #include <vlc_demux.h>
  30
  31 #include <vlc_osd.h>
  32
  33 #define HAS_SNAPSHOT 1
  34
  35 #ifdef HAS_SNAPSHOT
  36 #include <snapshot.h>
  37 #endif
  38
  39 #include <stdlib.h>                                      /* malloc(), free() */
  40 #include <string.h>
  41
  42 #include <errno.h>                                                 /* ENOMEM */
  43 #include <stdio.h>
  44 #include <ctype.h>
  45
  46 #ifdef HAVE_UNISTD_H
  47 #    include <unistd.h>
  48 #endif
  49 #ifdef HAVE_SYS_TIME_H
  50 #    include <sys/time.h>
  51 #endif
  52 #ifdef HAVE_SYS_TYPES_H
  53 #    include <sys/types.h>
  54 #endif
  55
  56 #define RAISE( c, m )  exception->code = c; \
  57                        exception->message = strdup(m);
  58
  59 vlc_t * vlc_current_object( int );
  60
  61 mediacontrol_Instance* mediacontrol_new_from_object( int vlc_object_id,
  62                                                      mediacontrol_Exception *exception )
  63 {
  64     mediacontrol_Instance* retval;
  65     vlc_object_t *p_vlc;
  66     vlc_object_t *p_object;
  67
  68     p_object = ( vlc_object_t* )vlc_current_object( vlc_object_id );
  69     if( ! p_object )
  70     {
  71         RAISE( mediacontrol_InternalException, "Unable to find vlc object" );
  72         return NULL;
  73     }
  74
  75     p_vlc = vlc_object_find( p_object, VLC_OBJECT_ROOT, FIND_PARENT );
  76     if( ! p_vlc )
  77     {
  78         RAISE( mediacontrol_InternalException, "Unable to initialize VLC" );
  79         return NULL;
  80     }
  81     retval = ( mediacontrol_Instance* )malloc( sizeof( mediacontrol_Instance ) );
  82     retval->p_vlc = p_vlc;
  83     retval->vlc_object_id = p_vlc->i_object_id;
  84
  85     /* We can keep references on these, which should not change. Is it true ? */
  86     retval->p_playlist = vlc_object_find( p_vlc,
  87                                         VLC_OBJECT_PLAYLIST, FIND_ANYWHERE );
  88     retval->p_intf = vlc_object_find( p_vlc, VLC_OBJECT_INTF, FIND_ANYWHERE );
  89
  90     if( ! retval->p_playlist || ! retval->p_intf )
  91     {
  92         RAISE( mediacontrol_InternalException, "No available interface" );
  93         return NULL;
  94     }
  95     return retval;
  96 };
  97
  98
  99 /**************************************************************************
 100  * Playback management
 101  **************************************************************************/
 102 mediacontrol_Position*
 103 mediacontrol_get_media_position( mediacontrol_Instance *self,
 104                                  const mediacontrol_PositionOrigin an_origin,
 105                                  const mediacontrol_PositionKey a_key,
 106                                  mediacontrol_Exception *exception )
 107 {
 108     mediacontrol_Position* retval;
 109     vlc_value_t val;
 110     input_thread_t * p_input = self->p_playlist->p_input;
 111
 112     exception = mediacontrol_exception_init( exception );
 113
 114     retval = ( mediacontrol_Position* )malloc( sizeof( mediacontrol_Position ) );
 115     retval->origin = an_origin;
 116     retval->key = a_key;
 117
 118     if( ! p_input )
 119     {
 120         RAISE( mediacontrol_InternalException, "No input thread." );
 121         return NULL;
 122     }
 123
 124     if(  an_origin != mediacontrol_AbsolutePosition )
 125     {
 126         /* Relative or ModuloPosition make no sense */
 127         RAISE( mediacontrol_PositionOriginNotSupported, "Only absolute position is valid." );
 128         return NULL;
 129     }
 130
 131     /* We are asked for an AbsolutePosition. */
 132     val.i_time = 0;
 133     var_Get( p_input, "time", &val );
 134     /* FIXME: check val.i_time > 0 */
 135
 136     retval->value = mediacontrol_unit_convert( p_input,
 137                                                mediacontrol_MediaTime,
 138                                                a_key,
 139                                                val.i_time / 1000 );
 140     return retval;
 141 }
 142
 143 /* Sets the media position */
 144 void
 145 mediacontrol_set_media_position( mediacontrol_Instance *self,
 146                                  const mediacontrol_Position * a_position,
 147                                  mediacontrol_Exception *exception )
 148 {
 149     vlc_value_t val;
 150     input_thread_t * p_input = self->p_playlist->p_input;
 151
 152     exception=mediacontrol_exception_init( exception );
 153     if( ! p_input )
 154     {
 155         RAISE( mediacontrol_InternalException, "No input thread." );
 156         return;
 157     }
 158
 159     if( !var_GetBool( p_input, "seekable" ) )
 160     {
 161         RAISE( mediacontrol_InvalidPosition, "Stream not seekable" );
 162         return;
 163     }
 164
 165     val.i_time = mediacontrol_position2microsecond( p_input, a_position );
 166     var_Set( p_input, "time", val );
 167     return;
 168 }
 169
 170 /* Starts playing a stream */
 171 void
 172 mediacontrol_start( mediacontrol_Instance *self,
 173                     const mediacontrol_Position * a_position,
 174                     mediacontrol_Exception *exception )
 175 {
 176     playlist_t * p_playlist = self->p_playlist;
 177
 178     exception = mediacontrol_exception_init( exception );
 179     if( ! p_playlist )
 180     {
 181         RAISE( mediacontrol_PlaylistException, "No available playlist" );
 182         return;
 183     }
 184
 185     vlc_mutex_lock( &p_playlist->object_lock );
 186     if( p_playlist->i_size )
 187     {
 188         int i_from;
 189
 190         vlc_mutex_unlock( &p_playlist->object_lock );
 191
 192         i_from = mediacontrol_position2microsecond( p_playlist->p_input, a_position ) / 1000000;
 193
 194         if( p_playlist->status.p_item )
 195         {
 196             char psz_from[20];
 197             snprintf( psz_from, 20, "start-time=%i", i_from);
 198             playlist_ItemAddOption( p_playlist->status.p_item, psz_from);
 199         }
 200
 201         playlist_Play( p_playlist );
 202     }
 203     else
 204     {
 205         RAISE( mediacontrol_PlaylistException, "Empty playlist." );
 206         vlc_mutex_unlock( &p_playlist->object_lock );
 207         return;
 208     }
 209
 210     return;
 211 }
 212
 213 void
 214 mediacontrol_pause( mediacontrol_Instance *self,
 215                     const mediacontrol_Position * a_position,
 216                     mediacontrol_Exception *exception )
 217 {
 218     input_thread_t *p_input = self->p_playlist->p_input;
 219
 220     /* FIXME: use the a_position parameter */
 221     exception=mediacontrol_exception_init( exception );
 222     if( p_input != NULL )
 223     {
 224         var_SetInteger( p_input, "state", PAUSE_S );
 225     }
 226     else
 227     {
 228         RAISE( mediacontrol_InternalException, "No input" );
 229     }
 230
 231     return;
 232 }
 233
 234 void
 235 mediacontrol_resume( mediacontrol_Instance *self,
 236                      const mediacontrol_Position * a_position,
 237                      mediacontrol_Exception *exception )
 238 {
 239     input_thread_t *p_input = self->p_playlist->p_input;
 240
 241     /* FIXME: use the a_position parameter */
 242     exception=mediacontrol_exception_init( exception );
 243     if( p_input != NULL )
 244     {
 245         var_SetInteger( p_input, "state", PAUSE_S );
 246     }
 247     else
 248     {
 249         RAISE( mediacontrol_InternalException, "No input" );
 250     }
 251 }
 252
 253 void
 254 mediacontrol_stop( mediacontrol_Instance *self,
 255                    const mediacontrol_Position * a_position,
 256                    mediacontrol_Exception *exception )
 257 {
 258     /* FIXME: use the a_position parameter */
 259     exception=mediacontrol_exception_init( exception );
 260     if( !self->p_playlist )
 261     {
 262         RAISE( mediacontrol_PlaylistException, "No playlist" );
 263         return;
 264     }
 265
 266     playlist_Stop( self->p_playlist );
 267 }
 268
 269 /**************************************************************************
 270  * Playlist management
 271  **************************************************************************/
 272
 273 void
 274 mediacontrol_playlist_add_item( mediacontrol_Instance *self,
 275                                 const char * psz_file,
 276                                 mediacontrol_Exception *exception )
 277 {
 278     exception=mediacontrol_exception_init( exception );
 279     if( !self->p_playlist )
 280     {
 281         RAISE( mediacontrol_InternalException, "No playlist" );
 282         return;
 283     }
 284
 285     playlist_Add( self->p_playlist, psz_file, psz_file , PLAYLIST_INSERT,
 286                   PLAYLIST_END );
 287 }
 288
 289 void
 290 mediacontrol_playlist_clear( mediacontrol_Instance *self,
 291                              mediacontrol_Exception *exception )
 292 {
 293     exception=mediacontrol_exception_init( exception );
 294     if( !self->p_playlist )
 295     {
 296         RAISE( mediacontrol_PlaylistException, "No playlist" );
 297         return;
 298     }
 299
 300     playlist_Clear( self->p_playlist );
 301
 302     return;
 303 }
 304
 305 mediacontrol_PlaylistSeq *
 306 mediacontrol_playlist_get_list( mediacontrol_Instance *self,
 307                                 mediacontrol_Exception *exception )
 308 {
 309     mediacontrol_PlaylistSeq *retval;
 310     int i_index;
 311     playlist_t * p_playlist = self->p_playlist;
 312     int i_playlist_size;
 313
 314     exception=mediacontrol_exception_init( exception );
 315     if( !p_playlist )
 316     {
 317         RAISE( mediacontrol_PlaylistException, "No playlist" );
 318         return NULL;
 319     }
 320
 321     vlc_mutex_lock( &p_playlist->object_lock );
 322     i_playlist_size = p_playlist->i_size;
 323
 324     retval = mediacontrol_PlaylistSeq__alloc( i_playlist_size );
 325
 326     for( i_index = 0 ; i_index < i_playlist_size ; i_index++ )
 327     {
 328         retval->data[i_index] = strdup( p_playlist->pp_items[i_index]->input.psz_uri );
 329     }
 330     vlc_mutex_unlock( &p_playlist->object_lock );
 331
 332     return retval;
 333 }
 334
 335 /***************************************************************************
 336  * Status feedback
 337  ***************************************************************************/
 338
 339 mediacontrol_StreamInformation *
 340 mediacontrol_get_stream_information( mediacontrol_Instance *self,
 341                                      mediacontrol_PositionKey a_key,
 342                                      mediacontrol_Exception *exception )
 343 {
 344     mediacontrol_StreamInformation *retval;
 345     input_thread_t *p_input = self->p_playlist->p_input;
 346     vlc_value_t val;
 347
 348     retval = ( mediacontrol_StreamInformation* )malloc( sizeof( mediacontrol_StreamInformation ) );
 349     if( ! retval )
 350     {
 351         RAISE( mediacontrol_InternalException, "Out of memory" );
 352         return NULL;
 353     }
 354
 355     if( ! p_input )
 356     {
 357         /* No p_input defined */
 358         retval->streamstatus = mediacontrol_UndefinedStatus;
 359         retval->url          = strdup( "None" );
 360         retval->position     = 0;
 361         retval->length       = 0;
 362     }
 363     else
 364     {
 365         switch( var_GetInteger( p_input, "state" ) )
 366         {
 367         case PLAYING_S     :
 368             retval->streamstatus = mediacontrol_PlayingStatus;
 369             break;
 370         case PAUSE_S       :
 371             retval->streamstatus = mediacontrol_PauseStatus;
 372             break;
 373         case INIT_S        :
 374             retval->streamstatus = mediacontrol_InitStatus;
 375             break;
 376         case END_S         :
 377             retval->streamstatus = mediacontrol_EndStatus;
 378             break;
 379         default :
 380             retval->streamstatus = mediacontrol_UndefinedStatus;
 381             break;
 382         }
 383
 384         retval->url = strdup( p_input->input.p_item->psz_uri );
 385
 386         /* TIME and LENGTH are in microseconds. We want them in ms */
 387         var_Get( p_input, "time", &val);
 388         retval->position = val.i_time / 1000;
 389
 390         var_Get( p_input, "length", &val);
 391         retval->length = val.i_time / 1000;
 392
 393         retval->position = mediacontrol_unit_convert( p_input,
 394                                                       mediacontrol_MediaTime, a_key,
 395                                                       retval->position );
 396         retval->length   = mediacontrol_unit_convert( p_input,
 397                                                       mediacontrol_MediaTime, a_key,
 398                                                       retval->length );
 399     }
 400     return retval;
 401 }