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         vlc_value_t val;
 189
 190         vlc_mutex_unlock( &p_playlist->object_lock );
 191
 192         /* Set start time */
 193         val.i_int = mediacontrol_position2microsecond( p_playlist->p_input, a_position ) / 1000000;
 194         var_Set( p_playlist, "start-time", val );
 195
 196         playlist_Play( p_playlist );
 197     }
 198     else
 199     {
 200         RAISE( mediacontrol_PlaylistException, "Empty playlist." );
 201         vlc_mutex_unlock( &p_playlist->object_lock );
 202         return;
 203     }
 204
 205     return;
 206 }
 207
 208 void
 209 mediacontrol_pause( mediacontrol_Instance *self,
 210                     const mediacontrol_Position * a_position,
 211                     mediacontrol_Exception *exception )
 212 {
 213     input_thread_t *p_input = self->p_playlist->p_input;
 214
 215     /* FIXME: use the a_position parameter */
 216     exception=mediacontrol_exception_init( exception );
 217     if( p_input != NULL )
 218     {
 219         var_SetInteger( p_input, "state", PAUSE_S );
 220     }
 221     else
 222     {
 223         RAISE( mediacontrol_InternalException, "No input" );
 224     }
 225
 226     return;
 227 }
 228
 229 void
 230 mediacontrol_resume( mediacontrol_Instance *self,
 231                      const mediacontrol_Position * a_position,
 232                      mediacontrol_Exception *exception )
 233 {
 234     input_thread_t *p_input = self->p_playlist->p_input;
 235
 236     /* FIXME: use the a_position parameter */
 237     exception=mediacontrol_exception_init( exception );
 238     if( p_input != NULL )
 239     {
 240         var_SetInteger( p_input, "state", PAUSE_S );
 241     }
 242     else
 243     {
 244         RAISE( mediacontrol_InternalException, "No input" );
 245     }
 246 }
 247
 248 void
 249 mediacontrol_stop( mediacontrol_Instance *self,
 250                    const mediacontrol_Position * a_position,
 251                    mediacontrol_Exception *exception )
 252 {
 253     /* FIXME: use the a_position parameter */
 254     exception=mediacontrol_exception_init( exception );
 255     if( !self->p_playlist )
 256     {
 257         RAISE( mediacontrol_PlaylistException, "No playlist" );
 258         return;
 259     }
 260
 261     playlist_Stop( self->p_playlist );
 262 }
 263
 264 /**************************************************************************
 265  * Playlist management
 266  **************************************************************************/
 267
 268 void
 269 mediacontrol_playlist_add_item( mediacontrol_Instance *self,
 270                                 const char * psz_file,
 271                                 mediacontrol_Exception *exception )
 272 {
 273     exception=mediacontrol_exception_init( exception );
 274     if( !self->p_playlist )
 275     {
 276         RAISE( mediacontrol_InternalException, "No playlist" );
 277         return;
 278     }
 279
 280     playlist_Add( self->p_playlist, psz_file, psz_file , PLAYLIST_INSERT,
 281                   PLAYLIST_END );
 282 }
 283
 284 void
 285 mediacontrol_playlist_clear( mediacontrol_Instance *self,
 286                              mediacontrol_Exception *exception )
 287 {
 288     exception=mediacontrol_exception_init( exception );
 289     if( !self->p_playlist )
 290     {
 291         RAISE( mediacontrol_PlaylistException, "No playlist" );
 292         return;
 293     }
 294
 295     playlist_Clear( self->p_playlist );
 296
 297     return;
 298 }
 299
 300 mediacontrol_PlaylistSeq *
 301 mediacontrol_playlist_get_list( mediacontrol_Instance *self,
 302                                 mediacontrol_Exception *exception )
 303 {
 304     mediacontrol_PlaylistSeq *retval;
 305     int i_index;
 306     playlist_t * p_playlist = self->p_playlist;
 307     int i_playlist_size;
 308
 309     exception=mediacontrol_exception_init( exception );
 310     if( !p_playlist )
 311     {
 312         RAISE( mediacontrol_PlaylistException, "No playlist" );
 313         return NULL;
 314     }
 315
 316     vlc_mutex_lock( &p_playlist->object_lock );
 317     i_playlist_size = p_playlist->i_size;
 318
 319     retval = mediacontrol_PlaylistSeq__alloc( i_playlist_size );
 320
 321     for( i_index = 0 ; i_index < i_playlist_size ; i_index++ )
 322     {
 323         retval->data[i_index] = strdup( p_playlist->pp_items[i_index]->input.psz_uri );
 324     }
 325     vlc_mutex_unlock( &p_playlist->object_lock );
 326
 327     return retval;
 328 }
 329
 330 /***************************************************************************
 331  * Status feedback
 332  ***************************************************************************/
 333
 334 mediacontrol_StreamInformation *
 335 mediacontrol_get_stream_information( mediacontrol_Instance *self,
 336                                      mediacontrol_PositionKey a_key,
 337                                      mediacontrol_Exception *exception )
 338 {
 339     mediacontrol_StreamInformation *retval;
 340     input_thread_t *p_input = self->p_playlist->p_input;
 341     vlc_value_t val;
 342
 343     retval = ( mediacontrol_StreamInformation* )malloc( sizeof( mediacontrol_StreamInformation ) );
 344     if( ! retval )
 345     {
 346         RAISE( mediacontrol_InternalException, "Out of memory" );
 347         return NULL;
 348     }
 349
 350     if( ! p_input )
 351     {
 352         /* No p_input defined */
 353         retval->streamstatus = mediacontrol_UndefinedStatus;
 354         retval->url          = strdup( "None" );
 355         retval->position     = 0;
 356         retval->length       = 0;
 357     }
 358     else
 359     {
 360         switch( var_GetInteger( p_input, "state" ) )
 361         {
 362         case PLAYING_S     :
 363             retval->streamstatus = mediacontrol_PlayingStatus;
 364             break;
 365         case PAUSE_S       :
 366             retval->streamstatus = mediacontrol_PauseStatus;
 367             break;
 368         case INIT_S        :
 369             retval->streamstatus = mediacontrol_InitStatus;
 370             break;
 371         case END_S         :
 372             retval->streamstatus = mediacontrol_EndStatus;
 373             break;
 374         default :
 375             retval->streamstatus = mediacontrol_UndefinedStatus;
 376             break;
 377         }
 378
 379         retval->url = strdup( p_input->input.p_item->psz_uri );
 380
 381         /* TIME and LENGTH are in microseconds. We want them in ms */
 382         var_Get( p_input, "time", &val);
 383         retval->position = val.i_time / 1000;
 384
 385         var_Get( p_input, "length", &val);
 386         retval->length = val.i_time / 1000;
 387
 388         retval->position = mediacontrol_unit_convert( p_input,
 389                                                       mediacontrol_MediaTime, a_key,
 390                                                       retval->position );
 391         retval->length   = mediacontrol_unit_convert( p_input,
 392                                                       mediacontrol_MediaTime, a_key,
 393                                                       retval->length );
 394     }
 395     return retval;
 396 }