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 available interface" );
  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, "Only absolute position is valid." );
 127         return NULL;
 128     }
 129
 130     /* We are asked for an AbsolutePosition. */
 131     val.i_time = 0;
 132     var_Get( p_input, "time", &val );
 133     /* FIXME: check val.i_time > 0 */
 134
 135     retval->value = mediacontrol_unit_convert( p_input,
 136                                                mediacontrol_MediaTime,
 137                                                a_key,
 138                                                val.i_time / 1000 );
 139     return retval;
 140 }
 141
 142 /* Sets the media position */
 143 void
 144 mediacontrol_set_media_position( mediacontrol_Instance *self,
 145                                  const mediacontrol_Position * a_position,
 146                                  mediacontrol_Exception *exception )
 147 {
 148     vlc_value_t val;
 149     input_thread_t * p_input = self->p_playlist->p_input;
 150
 151     exception=mediacontrol_exception_init( exception );
 152     if( ! p_input )
 153     {
 154         RAISE( mediacontrol_InternalException, "No input thread." );
 155     }
 156     else if( !var_GetBool( p_input, "seekable" ) )
 157     {
 158         RAISE( mediacontrol_InvalidPosition, "Stream not seekable" );
 159     }
 160     else
 161     {
 162         val.i_time = mediacontrol_position2microsecond( p_input, a_position );
 163         var_Set( p_input, "time", val );
 164     }
 165 }
 166
 167 /* Starts playing a stream */
 168 /*
 169  * Known issues: since moving in the playlist using playlist_Next
 170  * or playlist_Prev implies starting to play items, the a_position
 171  * argument will be only honored for the 1st item in the list.
 172  *
 173  * XXX:FIXME split moving in the playlist and playing items two
 174  * different actions or make playlist_<Next|Prev> accept a time
 175  * value to start to play from.
 176  */
 177 void
 178 mediacontrol_start( mediacontrol_Instance *self,
 179                     const mediacontrol_Position * a_position,
 180                     mediacontrol_Exception *exception )
 181 {
 182     playlist_t * p_playlist = self->p_playlist;
 183
 184     exception = mediacontrol_exception_init( exception );
 185     if( ! p_playlist )
 186     {
 187         RAISE( mediacontrol_PlaylistException, "No available playlist" );
 188         return;
 189     }
 190
 191     vlc_mutex_lock( &p_playlist->object_lock );
 192     if( p_playlist->i_size )
 193     {
 194         int i_index;
 195         int i_from;
 196         char *psz_from = NULL;
 197
 198         psz_from = ( char * )malloc( 20 * sizeof( char ) );
 199         if( psz_from )
 200         {
 201             i_from = mediacontrol_position2microsecond( p_playlist->p_input, a_position ) / 1000000;
 202
 203             i_index = p_playlist->i_index;
 204             if( i_index < 0 )
 205             {
 206                 /* We know that there is at least 1 element, since i_size != 0 */
 207                 i_index = 0;
 208             }
 209
 210             /* Set start time */
 211             snprintf( psz_from, 20, "start-time=%i", i_from );
 212             playlist_ItemAddOption( p_playlist->pp_items[i_index], psz_from );
 213             free( psz_from );
 214         }
 215
 216         vlc_mutex_unlock( &p_playlist->object_lock );
 217         playlist_Play( p_playlist );
 218     }
 219     else
 220     {
 221         RAISE( mediacontrol_PlaylistException, "Empty playlist." );
 222         vlc_mutex_unlock( &p_playlist->object_lock );
 223     }
 224 }
 225
 226 void
 227 mediacontrol_pause( mediacontrol_Instance *self,
 228                     const mediacontrol_Position * a_position,
 229                     mediacontrol_Exception *exception )
 230 {
 231     input_thread_t *p_input = self->p_playlist->p_input;
 232
 233     /* FIXME: use the a_position parameter */
 234     exception=mediacontrol_exception_init( exception );
 235     if( p_input != NULL )
 236     {
 237         var_SetInteger( p_input, "state", PAUSE_S );
 238     }
 239     else
 240     {
 241         RAISE( mediacontrol_InternalException, "No input" );
 242     }
 243 }
 244
 245 void
 246 mediacontrol_resume( mediacontrol_Instance *self,
 247                      const mediacontrol_Position * a_position,
 248                      mediacontrol_Exception *exception )
 249 {
 250     input_thread_t *p_input = self->p_playlist->p_input;
 251
 252     /* FIXME: use the a_position parameter */
 253     exception=mediacontrol_exception_init( exception );
 254     if( p_input != NULL )
 255     {
 256         var_SetInteger( p_input, "state", PAUSE_S );
 257     }
 258     else
 259     {
 260         RAISE( mediacontrol_InternalException, "No input" );
 261     }
 262 }
 263
 264 void
 265 mediacontrol_stop( mediacontrol_Instance *self,
 266                    const mediacontrol_Position * a_position,
 267                    mediacontrol_Exception *exception )
 268 {
 269     /* FIXME: use the a_position parameter */
 270     exception=mediacontrol_exception_init( exception );
 271     if( !self->p_playlist )
 272     {
 273         RAISE( mediacontrol_PlaylistException, "No playlist" );
 274     }
 275     else
 276         playlist_Stop( self->p_playlist );
 277 }
 278
 279 /**************************************************************************
 280  * Playlist management
 281  **************************************************************************/
 282
 283 void
 284 mediacontrol_playlist_add_item( mediacontrol_Instance *self,
 285                                 const char * psz_file,
 286                                 mediacontrol_Exception *exception )
 287 {
 288     exception=mediacontrol_exception_init( exception );
 289     if( !self->p_playlist )
 290     {
 291         RAISE( mediacontrol_InternalException, "No playlist" );
 292     }
 293     else
 294         playlist_Add( self->p_playlist, psz_file, psz_file , PLAYLIST_INSERT,
 295                       PLAYLIST_END );
 296 }
 297
 298 void
 299 mediacontrol_playlist_next_item( mediacontrol_Instance *self,
 300                                  mediacontrol_Exception *exception )
 301 {
 302     exception=mediacontrol_exception_init( exception );
 303     if ( !self->p_playlist )
 304     {
 305         RAISE( mediacontrol_InternalException, "No playlist" );
 306     }
 307     else
 308         playlist_Next( self->p_playlist );
 309 }
 310
 311 void
 312 mediacontrol_playlist_clear( mediacontrol_Instance *self,
 313                              mediacontrol_Exception *exception )
 314 {
 315     exception=mediacontrol_exception_init( exception );
 316     if( !self->p_playlist )
 317     {
 318         RAISE( mediacontrol_PlaylistException, "No playlist" );
 319     }
 320     else
 321         playlist_Clear( self->p_playlist );
 322 }
 323
 324 mediacontrol_PlaylistSeq *
 325 mediacontrol_playlist_get_list( mediacontrol_Instance *self,
 326                                 mediacontrol_Exception *exception )
 327 {
 328     mediacontrol_PlaylistSeq *retval = NULL;
 329     int i_index;
 330     playlist_t * p_playlist = self->p_playlist;
 331     int i_playlist_size;
 332
 333     exception=mediacontrol_exception_init( exception );
 334     if( !p_playlist )
 335     {
 336         RAISE( mediacontrol_PlaylistException, "No playlist" );
 337         return NULL;
 338     }
 339
 340     vlc_mutex_lock( &p_playlist->object_lock );
 341     i_playlist_size = p_playlist->i_size;
 342
 343     retval = mediacontrol_PlaylistSeq__alloc( i_playlist_size );
 344
 345     for( i_index = 0 ; i_index < i_playlist_size ; i_index++ )
 346     {
 347         retval->data[i_index] = strdup( p_playlist->pp_items[i_index]->input.psz_uri );
 348     }
 349     vlc_mutex_unlock( &p_playlist->object_lock );
 350
 351     return retval;
 352 }
 353
 354 /***************************************************************************
 355  * Status feedback
 356  ***************************************************************************/
 357
 358 mediacontrol_StreamInformation *
 359 mediacontrol_get_stream_information( mediacontrol_Instance *self,
 360                                      mediacontrol_PositionKey a_key,
 361                                      mediacontrol_Exception *exception )
 362 {
 363     mediacontrol_StreamInformation *retval = NULL;
 364     input_thread_t *p_input = self->p_playlist->p_input;
 365     vlc_value_t val;
 366
 367     retval = ( mediacontrol_StreamInformation* )malloc( sizeof( mediacontrol_StreamInformation ) );
 368     if( ! retval )
 369     {
 370         RAISE( mediacontrol_InternalException, "Out of memory" );
 371         return NULL;
 372     }
 373
 374     if( ! p_input )
 375     {
 376         /* No p_input defined */
 377         retval->streamstatus = mediacontrol_UndefinedStatus;
 378         retval->url          = strdup( "None" );
 379         retval->position     = 0;
 380         retval->length       = 0;
 381     }
 382     else
 383     {
 384         switch( var_GetInteger( p_input, "state" ) )
 385         {
 386         case PLAYING_S     :
 387             retval->streamstatus = mediacontrol_PlayingStatus;
 388             break;
 389         case PAUSE_S       :
 390             retval->streamstatus = mediacontrol_PauseStatus;
 391             break;
 392         case INIT_S        :
 393             retval->streamstatus = mediacontrol_InitStatus;
 394             break;
 395         case END_S         :
 396             retval->streamstatus = mediacontrol_EndStatus;
 397             break;
 398         default :
 399             retval->streamstatus = mediacontrol_UndefinedStatus;
 400             break;
 401         }
 402
 403         retval->url = strdup( p_input->input.p_item->psz_uri );
 404
 405         /* TIME and LENGTH are in microseconds. We want them in ms */
 406         var_Get( p_input, "time", &val);
 407         retval->position = val.i_time / 1000;
 408
 409         var_Get( p_input, "length", &val);
 410         retval->length = val.i_time / 1000;
 411
 412         retval->position = mediacontrol_unit_convert( p_input,
 413                                                       mediacontrol_MediaTime, a_key,
 414                                                       retval->position );
 415         retval->length   = mediacontrol_unit_convert( p_input,
 416                                                       mediacontrol_MediaTime, a_key,
 417                                                       retval->length );
 418     }
 419     return retval;
 420 }