git.sesse.net Git - vlc/blob - src/control/mediacontrol_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., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  22  *****************************************************************************/
  23
  24 #include <mediacontrol_internal.h>
  25 #include <vlc/mediacontrol.h>
  26
  27 #include <vlc/intf.h>
  28 #include <vlc/vout.h>
  29 #include <vlc/aout.h>
  30 #include <vlc_demux.h>
  31
  32 #include <vlc_osd.h>
  33
  34 #define HAS_SNAPSHOT 1
  35
  36 #ifdef HAS_SNAPSHOT
  37 #include <snapshot.h>
  38 #endif
  39
  40 #include <stdlib.h>                                      /* malloc(), free() */
  41 #include <string.h>
  42
  43 #include <errno.h>                                                 /* ENOMEM */
  44 #include <stdio.h>
  45 #include <ctype.h>
  46
  47 #ifdef HAVE_UNISTD_H
  48 #    include <unistd.h>
  49 #endif
  50 #ifdef HAVE_SYS_TIME_H
  51 #    include <sys/time.h>
  52 #endif
  53 #ifdef HAVE_SYS_TYPES_H
  54 #    include <sys/types.h>
  55 #endif
  56
  57 #define RAISE( c, m )  exception->code = c; \
  58                        exception->message = strdup(m);
  59
  60 mediacontrol_Instance* mediacontrol_new_from_object( int vlc_object_id,
  61                                                      mediacontrol_Exception *exception )
  62 {
  63     mediacontrol_Instance* retval = NULL;
  64     vlc_object_t *p_vlc;
  65     vlc_object_t *p_object;
  66
  67     p_object = ( vlc_object_t* )vlc_current_object( vlc_object_id );
  68     if( ! p_object )
  69     {
  70         RAISE( mediacontrol_InternalException, "unable to find vlc object" );
  71         return NULL;
  72     }
  73
  74     p_vlc = vlc_object_find( p_object, VLC_OBJECT_ROOT, FIND_PARENT );
  75     if( ! p_vlc )
  76     {
  77         RAISE( mediacontrol_InternalException, "unable to initialize VLC" );
  78         return NULL;
  79     }
  80     retval = ( mediacontrol_Instance* )malloc( sizeof( mediacontrol_Instance ) );
  81     retval->p_vlc = p_vlc;
  82     retval->vlc_object_id = p_vlc->i_object_id;
  83
  84     /* We can keep references on these, which should not change. Is it true ? */
  85     retval->p_playlist = vlc_object_find( p_vlc,
  86                                         VLC_OBJECT_PLAYLIST, FIND_ANYWHERE );
  87     retval->p_intf = vlc_object_find( p_vlc, VLC_OBJECT_INTF, FIND_ANYWHERE );
  88
  89     if( ! retval->p_playlist || ! retval->p_intf )
  90     {
  91         RAISE( mediacontrol_InternalException, "no interface available" );
  92         return NULL;
  93     }
  94     return retval;
  95 };
  96
  97
  98 /**************************************************************************
  99  * Playback management
 100  **************************************************************************/
 101 mediacontrol_Position*
 102 mediacontrol_get_media_position( mediacontrol_Instance *self,
 103                                  const mediacontrol_PositionOrigin an_origin,
 104                                  const mediacontrol_PositionKey a_key,
 105                                  mediacontrol_Exception *exception )
 106 {
 107     mediacontrol_Position* retval = NULL;
 108     vlc_value_t val;
 109     input_thread_t * p_input = self->p_playlist->p_input;
 110
 111     exception = mediacontrol_exception_init( exception );
 112
 113     retval = ( mediacontrol_Position* )malloc( sizeof( mediacontrol_Position ) );
 114     retval->origin = an_origin;
 115     retval->key = a_key;
 116
 117     if( ! p_input )
 118     {
 119         RAISE( mediacontrol_InternalException, "No input thread." );
 120         return NULL;
 121     }
 122
 123     if(  an_origin != mediacontrol_AbsolutePosition )
 124     {
 125         /* Relative or ModuloPosition make no sense */
 126         RAISE( mediacontrol_PositionOriginNotSupported,
 127                                         "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     }
 157     else if( !var_GetBool( p_input, "seekable" ) )
 158     {
 159         RAISE( mediacontrol_InvalidPosition, "Stream not seekable" );
 160     }
 161     else
 162     {
 163         val.i_time = mediacontrol_position2microsecond( p_input, a_position );
 164         var_Set( p_input, "time", val );
 165     }
 166 }
 167
 168 /* Starts playing a stream */
 169 /*
 170  * Known issues: since moving in the playlist using playlist_Next
 171  * or playlist_Prev implies starting to play items, the a_position
 172  * argument will be only honored for the 1st item in the list.
 173  *
 174  * XXX:FIXME split moving in the playlist and playing items two
 175  * different actions or make playlist_<Next|Prev> accept a time
 176  * value to start to play from.
 177  */
 178 void
 179 mediacontrol_start( mediacontrol_Instance *self,
 180                     const mediacontrol_Position * a_position,
 181                     mediacontrol_Exception *exception )
 182 {
 183     playlist_t * p_playlist = self->p_playlist;
 184
 185     exception = mediacontrol_exception_init( exception );
 186     if( ! p_playlist )
 187     {
 188         RAISE( mediacontrol_PlaylistException, "No available playlist" );
 189         return;
 190     }
 191
 192     vlc_mutex_lock( &p_playlist->object_lock );
 193     if( p_playlist->i_size )
 194     {
 195         int i_index;
 196         int i_from;
 197         char *psz_from = NULL;
 198
 199         psz_from = ( char * )malloc( 20 * sizeof( char ) );
 200         if( psz_from )
 201         {
 202             i_from = mediacontrol_position2microsecond( p_playlist->p_input, a_position ) / 1000000;
 203
 204             i_index = p_playlist->i_index;
 205             if( i_index < 0 )
 206             {
 207                 /* We know that there is at least 1 element, since i_size != 0 */
 208                 i_index = 0;
 209             }
 210
 211             /* Set start time */
 212             snprintf( psz_from, 20, "start-time=%i", i_from );
 213             playlist_ItemAddOption( p_playlist->pp_items[i_index], psz_from );
 214             free( psz_from );
 215         }
 216
 217         vlc_mutex_unlock( &p_playlist->object_lock );
 218         playlist_Play( p_playlist );
 219     }
 220     else
 221     {
 222         RAISE( mediacontrol_PlaylistException, "Empty playlist." );
 223         vlc_mutex_unlock( &p_playlist->object_lock );
 224     }
 225 }
 226
 227 void
 228 mediacontrol_pause( mediacontrol_Instance *self,
 229                     const mediacontrol_Position * a_position,
 230                     mediacontrol_Exception *exception )
 231 {
 232     input_thread_t *p_input = self->p_playlist->p_input;
 233
 234     /* FIXME: use the a_position parameter */
 235     exception=mediacontrol_exception_init( exception );
 236     if( p_input != NULL )
 237     {
 238         var_SetInteger( p_input, "state", PAUSE_S );
 239     }
 240     else
 241     {
 242         RAISE( mediacontrol_InternalException, "No input" );
 243     }
 244 }
 245
 246 void
 247 mediacontrol_resume( mediacontrol_Instance *self,
 248                      const mediacontrol_Position * a_position,
 249                      mediacontrol_Exception *exception )
 250 {
 251     input_thread_t *p_input = self->p_playlist->p_input;
 252
 253     /* FIXME: use the a_position parameter */
 254     exception=mediacontrol_exception_init( exception );
 255     if( p_input != NULL )
 256     {
 257         var_SetInteger( p_input, "state", PAUSE_S );
 258     }
 259     else
 260     {
 261         RAISE( mediacontrol_InternalException, "No input" );
 262     }
 263 }
 264
 265 void
 266 mediacontrol_stop( mediacontrol_Instance *self,
 267                    const mediacontrol_Position * a_position,
 268                    mediacontrol_Exception *exception )
 269 {
 270     /* FIXME: use the a_position parameter */
 271     exception=mediacontrol_exception_init( exception );
 272     if( !self->p_playlist )
 273     {
 274         RAISE( mediacontrol_PlaylistException, "No playlist" );
 275     }
 276     else
 277         playlist_Stop( self->p_playlist );
 278 }
 279
 280 /**************************************************************************
 281  * Playlist management
 282  **************************************************************************/
 283
 284 void
 285 mediacontrol_playlist_add_item( mediacontrol_Instance *self,
 286                                 const char * psz_file,
 287                                 mediacontrol_Exception *exception )
 288 {
 289     exception=mediacontrol_exception_init( exception );
 290     if( !self->p_playlist )
 291     {
 292         RAISE( mediacontrol_InternalException, "No playlist" );
 293     }
 294     else
 295         playlist_Add( self->p_playlist, psz_file, psz_file , PLAYLIST_INSERT,
 296                       PLAYLIST_END );
 297 }
 298
 299 void
 300 mediacontrol_playlist_next_item( mediacontrol_Instance *self,
 301                                  mediacontrol_Exception *exception )
 302 {
 303     exception=mediacontrol_exception_init( exception );
 304     if ( !self->p_playlist )
 305     {
 306         RAISE( mediacontrol_InternalException, "No playlist" );
 307     }
 308     else
 309         playlist_Next( self->p_playlist );
 310 }
 311
 312 void
 313 mediacontrol_playlist_clear( mediacontrol_Instance *self,
 314                              mediacontrol_Exception *exception )
 315 {
 316     exception=mediacontrol_exception_init( exception );
 317     if( !self->p_playlist )
 318     {
 319         RAISE( mediacontrol_PlaylistException, "No playlist" );
 320     }
 321     else
 322         playlist_Clear( self->p_playlist );
 323 }
 324
 325 mediacontrol_PlaylistSeq *
 326 mediacontrol_playlist_get_list( mediacontrol_Instance *self,
 327                                 mediacontrol_Exception *exception )
 328 {
 329     mediacontrol_PlaylistSeq *retval = NULL;
 330     int i_index;
 331     playlist_t * p_playlist = self->p_playlist;
 332     int i_playlist_size;
 333
 334     exception=mediacontrol_exception_init( exception );
 335     if( !p_playlist )
 336     {
 337         RAISE( mediacontrol_PlaylistException, "No playlist" );
 338         return NULL;
 339     }
 340
 341     vlc_mutex_lock( &p_playlist->object_lock );
 342     i_playlist_size = p_playlist->i_size;
 343
 344     retval = mediacontrol_PlaylistSeq__alloc( i_playlist_size );
 345
 346     for( i_index = 0 ; i_index < i_playlist_size ; i_index++ )
 347     {
 348         retval->data[i_index] = strdup( p_playlist->pp_items[i_index]->input.psz_uri );
 349     }
 350     vlc_mutex_unlock( &p_playlist->object_lock );
 351
 352     return retval;
 353 }
 354
 355 /***************************************************************************
 356  * Status feedback
 357  ***************************************************************************/
 358
 359 mediacontrol_StreamInformation *
 360 mediacontrol_get_stream_information( mediacontrol_Instance *self,
 361                                      mediacontrol_PositionKey a_key,
 362                                      mediacontrol_Exception *exception )
 363 {
 364     mediacontrol_StreamInformation *retval = NULL;
 365     input_thread_t *p_input = self->p_playlist->p_input;
 366     vlc_value_t val;
 367
 368     retval = ( mediacontrol_StreamInformation* )
 369                             malloc( sizeof( mediacontrol_StreamInformation ) );
 370     if( ! retval )
 371     {
 372         RAISE( mediacontrol_InternalException, "Out of memory" );
 373         return NULL;
 374     }
 375
 376     if( ! p_input )
 377     {
 378         /* No p_input defined */
 379         retval->streamstatus = mediacontrol_UndefinedStatus;
 380         retval->url          = strdup( "None" );
 381         retval->position     = 0;
 382         retval->length       = 0;
 383     }
 384     else
 385     {
 386         switch( var_GetInteger( p_input, "state" ) )
 387         {
 388         case PLAYING_S     :
 389             retval->streamstatus = mediacontrol_PlayingStatus;
 390             break;
 391         case PAUSE_S       :
 392             retval->streamstatus = mediacontrol_PauseStatus;
 393             break;
 394         case INIT_S        :
 395             retval->streamstatus = mediacontrol_InitStatus;
 396             break;
 397         case END_S         :
 398             retval->streamstatus = mediacontrol_EndStatus;
 399             break;
 400         default :
 401             retval->streamstatus = mediacontrol_UndefinedStatus;
 402             break;
 403         }
 404
 405         retval->url = strdup( p_input->input.p_item->psz_uri );
 406
 407         /* TIME and LENGTH are in microseconds. We want them in ms */
 408         var_Get( p_input, "time", &val);
 409         retval->position = val.i_time / 1000;
 410
 411         var_Get( p_input, "length", &val);
 412         retval->length = val.i_time / 1000;
 413
 414         retval->position = mediacontrol_unit_convert( p_input,
 415                                          mediacontrol_MediaTime, a_key,
 416                                          retval->position );
 417         retval->length   = mediacontrol_unit_convert( p_input,
 418                                          mediacontrol_MediaTime, a_key,
 419                                          retval->length );
 420     }
 421     return retval;
 422 }