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: vlc.c 10786 2005-04-23 23:19:17Z zorglub $
   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 <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
  50 #ifdef HAVE_SYS_TIME_H
  51 #    include <sys/time.h>
  52 #endif
  53 #include <sys/types.h>
  54
  55 #define RAISE( c, m )  exception->code = c; \
  56                        exception->message = strdup(m);
  57
  58
  59 mediacontrol_Instance* mediacontrol_new_from_object( vlc_object_t* p_object,
  60                                                      mediacontrol_Exception *exception )
  61 {
  62     mediacontrol_Instance* retval;
  63     vlc_object_t *p_vlc;
  64
  65     p_vlc = vlc_object_find( p_object, VLC_OBJECT_ROOT, FIND_PARENT );
  66     if( ! p_vlc )
  67     {
  68         RAISE( mediacontrol_InternalException, "Unable to initialize VLC" );
  69         return NULL;
  70     }
  71     retval = ( mediacontrol_Instance* )malloc( sizeof( mediacontrol_Instance ) );
  72     retval->p_vlc = p_vlc;
  73     retval->vlc_object_id = p_vlc->i_object_id;
  74
  75     /* We can keep references on these, which should not change. Is it true ? */
  76     retval->p_playlist = vlc_object_find( p_vlc, VLC_OBJECT_PLAYLIST, FIND_ANYWHERE );
  77     retval->p_intf = vlc_object_find( p_vlc, VLC_OBJECT_INTF, FIND_ANYWHERE );
  78
  79     if( ! retval->p_playlist || ! retval->p_intf )
  80     {
  81         RAISE( mediacontrol_InternalException, "No available interface" );
  82         return NULL;
  83     }
  84     return retval;
  85 };
  86
  87
  88 /**************************************************************************
  89  * Playback management
  90  **************************************************************************/
  91 mediacontrol_Position*
  92 mediacontrol_get_media_position( mediacontrol_Instance *self,
  93                                  const mediacontrol_PositionOrigin an_origin,
  94                                  const mediacontrol_PositionKey a_key,
  95                                  mediacontrol_Exception *exception )
  96 {
  97     mediacontrol_Position* retval;
  98     vlc_value_t val;
  99     input_thread_t * p_input = self->p_playlist->p_input;
 100
 101     exception = mediacontrol_exception_init( exception );
 102
 103     retval = ( mediacontrol_Position* )malloc( sizeof( mediacontrol_Position ) );
 104     retval->origin = an_origin;
 105     retval->key = a_key;
 106
 107     if( ! p_input )
 108     {
 109         /*
 110            RAISE( mediacontrol_InternalException, "No input thread." );
 111            return( NULL );
 112         */
 113         retval->value = 0;
 114         return retval;
 115     }
 116
 117     if(  an_origin == mediacontrol_RelativePosition
 118          || an_origin == mediacontrol_ModuloPosition )
 119     {
 120         /* Relative or ModuloPosition make no sense */
 121         retval->value = 0;
 122         return retval;
 123     }
 124
 125     /* We are asked for an AbsolutePosition. */
 126     val.i_time = 0;
 127     var_Get( p_input, "time", &val );
 128     /* FIXME: check val.i_time > 0 */
 129
 130     retval->value = mediacontrol_unit_convert( p_input,
 131                                                mediacontrol_MediaTime,
 132                                                a_key,
 133                                                val.i_time / 1000 );
 134     return retval;
 135 }
 136
 137 /* Sets the media position */
 138 void
 139 mediacontrol_set_media_position( mediacontrol_Instance *self,
 140                                  const mediacontrol_Position * a_position,
 141                                  mediacontrol_Exception *exception )
 142 {
 143     vlc_value_t val;
 144     input_thread_t * p_input = self->p_playlist->p_input;
 145
 146     exception=mediacontrol_exception_init( exception );
 147     if( ! p_input )
 148     {
 149         RAISE( mediacontrol_InternalException, "No input thread." );
 150         return;
 151     }
 152
 153     if( !var_GetBool( p_input, "seekable" ) )
 154     {
 155         RAISE( mediacontrol_InvalidPosition, "Stream not seekable" );
 156         return;
 157     }
 158
 159     val.i_time = mediacontrol_position2microsecond( p_input, a_position );
 160     var_Set( p_input, "time", val );
 161     return;
 162 }
 163
 164 /* Starts playing a stream */
 165 void
 166 mediacontrol_start( mediacontrol_Instance *self,
 167                     const mediacontrol_Position * a_position,
 168                     mediacontrol_Exception *exception )
 169 {
 170     playlist_t * p_playlist = self->p_playlist;
 171
 172     exception = mediacontrol_exception_init( exception );
 173     if( ! p_playlist )
 174     {
 175         RAISE( mediacontrol_PlaylistException, "No available playlist" );
 176         return;
 177     }
 178
 179     vlc_mutex_lock( &p_playlist->object_lock );
 180     if( p_playlist->i_size )
 181     {
 182         vlc_value_t val;
 183
 184         vlc_mutex_unlock( &p_playlist->object_lock );
 185
 186         /* Set start time */
 187         val.i_int = mediacontrol_position2microsecond( p_playlist->p_input, a_position ) / 1000000;
 188         var_Set( p_playlist, "start-time", val );
 189
 190         playlist_Play( p_playlist );
 191     }
 192     else
 193     {
 194         RAISE( mediacontrol_PlaylistException, "Empty playlist." );
 195         vlc_mutex_unlock( &p_playlist->object_lock );
 196         return;
 197     }
 198
 199     return;
 200 }
 201
 202 void
 203 mediacontrol_pause( mediacontrol_Instance *self,
 204                     const mediacontrol_Position * a_position,
 205                     mediacontrol_Exception *exception )
 206 {
 207     input_thread_t *p_input = self->p_playlist->p_input;;
 208
 209     /* FIXME: use the a_position parameter */
 210     exception=mediacontrol_exception_init( exception );
 211     if( p_input != NULL )
 212     {
 213         var_SetInteger( p_input, "state", PAUSE_S );
 214     }
 215     else
 216     {
 217         RAISE( mediacontrol_InternalException, "No input" );
 218     }
 219
 220     return;
 221 }
 222
 223 void
 224 mediacontrol_resume( mediacontrol_Instance *self,
 225                      const mediacontrol_Position * a_position,
 226                      mediacontrol_Exception *exception )
 227 {
 228     input_thread_t *p_input = self->p_playlist->p_input;
 229
 230     /* FIXME: use the a_position parameter */
 231     exception=mediacontrol_exception_init( exception );
 232     if( p_input != NULL )
 233     {
 234         var_SetInteger( p_input, "state", PAUSE_S );
 235     }
 236     else
 237     {
 238         RAISE( mediacontrol_InternalException, "No input" );
 239     }
 240 }
 241
 242 void
 243 mediacontrol_stop( mediacontrol_Instance *self,
 244                    const mediacontrol_Position * a_position,
 245                    mediacontrol_Exception *exception )
 246 {
 247     /* FIXME: use the a_position parameter */
 248     exception=mediacontrol_exception_init( exception );
 249     if( !self->p_playlist )
 250     {
 251         RAISE( mediacontrol_PlaylistException, "No playlist" );
 252         return;
 253     }
 254
 255     playlist_Stop( self->p_playlist );
 256 }
 257
 258 /**************************************************************************
 259  * Playlist management
 260  **************************************************************************/
 261
 262 void
 263 mediacontrol_playlist_add_item( mediacontrol_Instance *self,
 264                                 const char * psz_file,
 265                                 mediacontrol_Exception *exception )
 266 {
 267     exception=mediacontrol_exception_init( exception );
 268     if( !self->p_playlist )
 269     {
 270         RAISE( mediacontrol_InternalException, "No playlist" );
 271         return;
 272     }
 273
 274     playlist_Add( self->p_playlist, psz_file, psz_file , PLAYLIST_REPLACE, 0 );
 275 }
 276
 277 void
 278 mediacontrol_playlist_clear( mediacontrol_Instance *self,
 279                              mediacontrol_Exception *exception )
 280 {
 281     exception=mediacontrol_exception_init( exception );
 282     if( !self->p_playlist )
 283     {
 284         RAISE( mediacontrol_PlaylistException, "No playlist" );
 285         return;
 286     }
 287
 288     playlist_Clear( self->p_playlist );
 289
 290     return;
 291 }
 292
 293 mediacontrol_PlaylistSeq *
 294 mediacontrol_playlist_get_list( mediacontrol_Instance *self,
 295                                 mediacontrol_Exception *exception )
 296 {
 297     mediacontrol_PlaylistSeq *retval;
 298     int i_index;
 299     playlist_t * p_playlist = self->p_playlist;
 300     int i_playlist_size;
 301
 302     exception=mediacontrol_exception_init( exception );
 303     if( !p_playlist )
 304     {
 305         RAISE( mediacontrol_PlaylistException, "No playlist" );
 306         return NULL;
 307     }
 308
 309     vlc_mutex_lock( &p_playlist->object_lock );
 310     i_playlist_size = p_playlist->i_size;
 311
 312     retval = mediacontrol_PlaylistSeq__alloc( i_playlist_size );
 313
 314     for( i_index = 0 ; i_index < i_playlist_size ; i_index++ )
 315     {
 316         retval->data[i_index] = strdup( p_playlist->pp_items[i_index]->input.psz_uri );
 317     }
 318     vlc_mutex_unlock( &p_playlist->object_lock );
 319
 320     return retval;
 321 }
 322
 323 /***************************************************************************
 324  * Status feedback
 325  ***************************************************************************/
 326
 327 mediacontrol_StreamInformation *
 328 mediacontrol_get_stream_information( mediacontrol_Instance *self,
 329                                      mediacontrol_PositionKey a_key,
 330                                      mediacontrol_Exception *exception )
 331 {
 332     mediacontrol_StreamInformation *retval;
 333     input_thread_t *p_input = self->p_playlist->p_input;
 334     vlc_value_t val;
 335
 336     retval = ( mediacontrol_StreamInformation* )malloc( sizeof( mediacontrol_StreamInformation ) );
 337     if( ! retval )
 338     {
 339         RAISE( mediacontrol_InternalException, "Out of memory" );
 340         return NULL;
 341     }
 342
 343     if( ! p_input )
 344     {
 345         /* No p_input defined */
 346         retval->streamstatus = mediacontrol_UndefinedStatus;
 347         retval->url          = strdup( "None" );
 348         retval->position     = 0;
 349         retval->length       = 0;
 350     }
 351     else
 352     {
 353         switch( var_GetInteger( p_input, "state" ) )
 354         {
 355         case PLAYING_S     :
 356             retval->streamstatus = mediacontrol_PlayingStatus;
 357             break;
 358         case PAUSE_S       :
 359             retval->streamstatus = mediacontrol_PauseStatus;
 360             break;
 361         case INIT_S        :
 362             retval->streamstatus = mediacontrol_InitStatus;
 363             break;
 364         case END_S         :
 365             retval->streamstatus = mediacontrol_EndStatus;
 366             break;
 367         default :
 368             retval->streamstatus = mediacontrol_UndefinedStatus;
 369             break;
 370         }
 371
 372         retval->url = strdup( p_input->input.p_item->psz_uri );
 373
 374         /* TIME and LENGTH are in microseconds. We want them in ms */
 375         var_Get( p_input, "time", &val);
 376         retval->position = val.i_time / 1000;
 377
 378         var_Get( p_input, "length", &val);
 379         retval->length = val.i_time / 1000;
 380
 381         retval->position = mediacontrol_unit_convert( p_input,
 382                                                       mediacontrol_MediaTime, a_key,
 383                                                       retval->position );
 384         retval->length   = mediacontrol_unit_convert( p_input,
 385                                                       mediacontrol_MediaTime, a_key,
 386                                                       retval->length );
 387     }
 388     return retval;
 389 }