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 <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
  60 mediacontrol_Instance* mediacontrol_new_from_object( vlc_object_t* p_object,
  61                                                      mediacontrol_Exception *exception )
  62 {
  63     mediacontrol_Instance* retval;
  64     vlc_object_t *p_vlc;
  65
  66     p_vlc = vlc_object_find( p_object, VLC_OBJECT_ROOT, FIND_PARENT );
  67     if( ! p_vlc )
  68     {
  69         RAISE( mediacontrol_InternalException, "Unable to initialize VLC" );
  70         return NULL;
  71     }
  72     retval = ( mediacontrol_Instance* )malloc( sizeof( mediacontrol_Instance ) );
  73     retval->p_vlc = p_vlc;
  74     retval->vlc_object_id = p_vlc->i_object_id;
  75
  76     /* We can keep references on these, which should not change. Is it true ? */
  77     retval->p_playlist = vlc_object_find( p_vlc, VLC_OBJECT_PLAYLIST, FIND_ANYWHERE );
  78     retval->p_intf = vlc_object_find( p_vlc, VLC_OBJECT_INTF, FIND_ANYWHERE );
  79
  80     if( ! retval->p_playlist || ! retval->p_intf )
  81     {
  82         RAISE( mediacontrol_InternalException, "No available interface" );
  83         return NULL;
  84     }
  85     return retval;
  86 };
  87
  88
  89 /**************************************************************************
  90  * Playback management
  91  **************************************************************************/
  92 mediacontrol_Position*
  93 mediacontrol_get_media_position( mediacontrol_Instance *self,
  94                                  const mediacontrol_PositionOrigin an_origin,
  95                                  const mediacontrol_PositionKey a_key,
  96                                  mediacontrol_Exception *exception )
  97 {
  98     mediacontrol_Position* retval;
  99     vlc_value_t val;
 100     input_thread_t * p_input = self->p_playlist->p_input;
 101
 102     exception = mediacontrol_exception_init( exception );
 103
 104     retval = ( mediacontrol_Position* )malloc( sizeof( mediacontrol_Position ) );
 105     retval->origin = an_origin;
 106     retval->key = a_key;
 107
 108     if( ! p_input )
 109     {
 110         /*
 111            RAISE( mediacontrol_InternalException, "No input thread." );
 112            return( NULL );
 113         */
 114         retval->value = 0;
 115         return retval;
 116     }
 117
 118     if(  an_origin == mediacontrol_RelativePosition
 119          || an_origin == mediacontrol_ModuloPosition )
 120     {
 121         /* Relative or ModuloPosition make no sense */
 122         retval->value = 0;
 123         return retval;
 124     }
 125
 126     /* We are asked for an AbsolutePosition. */
 127     val.i_time = 0;
 128     var_Get( p_input, "time", &val );
 129     /* FIXME: check val.i_time > 0 */
 130
 131     retval->value = mediacontrol_unit_convert( p_input,
 132                                                mediacontrol_MediaTime,
 133                                                a_key,
 134                                                val.i_time / 1000 );
 135     return retval;
 136 }
 137
 138 /* Sets the media position */
 139 void
 140 mediacontrol_set_media_position( mediacontrol_Instance *self,
 141                                  const mediacontrol_Position * a_position,
 142                                  mediacontrol_Exception *exception )
 143 {
 144     vlc_value_t val;
 145     input_thread_t * p_input = self->p_playlist->p_input;
 146
 147     exception=mediacontrol_exception_init( exception );
 148     if( ! p_input )
 149     {
 150         RAISE( mediacontrol_InternalException, "No input thread." );
 151         return;
 152     }
 153
 154     if( !var_GetBool( p_input, "seekable" ) )
 155     {
 156         RAISE( mediacontrol_InvalidPosition, "Stream not seekable" );
 157         return;
 158     }
 159
 160     val.i_time = mediacontrol_position2microsecond( p_input, a_position );
 161     var_Set( p_input, "time", val );
 162     return;
 163 }
 164
 165 /* Starts playing a stream */
 166 void
 167 mediacontrol_start( mediacontrol_Instance *self,
 168                     const mediacontrol_Position * a_position,
 169                     mediacontrol_Exception *exception )
 170 {
 171     playlist_t * p_playlist = self->p_playlist;
 172
 173     exception = mediacontrol_exception_init( exception );
 174     if( ! p_playlist )
 175     {
 176         RAISE( mediacontrol_PlaylistException, "No available playlist" );
 177         return;
 178     }
 179
 180     vlc_mutex_lock( &p_playlist->object_lock );
 181     if( p_playlist->i_size )
 182     {
 183         vlc_value_t val;
 184
 185         vlc_mutex_unlock( &p_playlist->object_lock );
 186
 187         /* Set start time */
 188         val.i_int = mediacontrol_position2microsecond( p_playlist->p_input, a_position ) / 1000000;
 189         var_Set( p_playlist, "start-time", val );
 190
 191         playlist_Play( p_playlist );
 192     }
 193     else
 194     {
 195         RAISE( mediacontrol_PlaylistException, "Empty playlist." );
 196         vlc_mutex_unlock( &p_playlist->object_lock );
 197         return;
 198     }
 199
 200     return;
 201 }
 202
 203 void
 204 mediacontrol_pause( mediacontrol_Instance *self,
 205                     const mediacontrol_Position * a_position,
 206                     mediacontrol_Exception *exception )
 207 {
 208     input_thread_t *p_input = self->p_playlist->p_input;;
 209
 210     /* FIXME: use the a_position parameter */
 211     exception=mediacontrol_exception_init( exception );
 212     if( p_input != NULL )
 213     {
 214         var_SetInteger( p_input, "state", PAUSE_S );
 215     }
 216     else
 217     {
 218         RAISE( mediacontrol_InternalException, "No input" );
 219     }
 220
 221     return;
 222 }
 223
 224 void
 225 mediacontrol_resume( mediacontrol_Instance *self,
 226                      const mediacontrol_Position * a_position,
 227                      mediacontrol_Exception *exception )
 228 {
 229     input_thread_t *p_input = self->p_playlist->p_input;
 230
 231     /* FIXME: use the a_position parameter */
 232     exception=mediacontrol_exception_init( exception );
 233     if( p_input != NULL )
 234     {
 235         var_SetInteger( p_input, "state", PAUSE_S );
 236     }
 237     else
 238     {
 239         RAISE( mediacontrol_InternalException, "No input" );
 240     }
 241 }
 242
 243 void
 244 mediacontrol_stop( mediacontrol_Instance *self,
 245                    const mediacontrol_Position * a_position,
 246                    mediacontrol_Exception *exception )
 247 {
 248     /* FIXME: use the a_position parameter */
 249     exception=mediacontrol_exception_init( exception );
 250     if( !self->p_playlist )
 251     {
 252         RAISE( mediacontrol_PlaylistException, "No playlist" );
 253         return;
 254     }
 255
 256     playlist_Stop( self->p_playlist );
 257 }
 258
 259 /**************************************************************************
 260  * Playlist management
 261  **************************************************************************/
 262
 263 void
 264 mediacontrol_playlist_add_item( mediacontrol_Instance *self,
 265                                 const char * psz_file,
 266                                 mediacontrol_Exception *exception )
 267 {
 268     exception=mediacontrol_exception_init( exception );
 269     if( !self->p_playlist )
 270     {
 271         RAISE( mediacontrol_InternalException, "No playlist" );
 272         return;
 273     }
 274
 275     playlist_Add( self->p_playlist, psz_file, psz_file , PLAYLIST_REPLACE, 0 );
 276 }
 277
 278 void
 279 mediacontrol_playlist_clear( mediacontrol_Instance *self,
 280                              mediacontrol_Exception *exception )
 281 {
 282     exception=mediacontrol_exception_init( exception );
 283     if( !self->p_playlist )
 284     {
 285         RAISE( mediacontrol_PlaylistException, "No playlist" );
 286         return;
 287     }
 288
 289     playlist_Clear( self->p_playlist );
 290
 291     return;
 292 }
 293
 294 mediacontrol_PlaylistSeq *
 295 mediacontrol_playlist_get_list( mediacontrol_Instance *self,
 296                                 mediacontrol_Exception *exception )
 297 {
 298     mediacontrol_PlaylistSeq *retval;
 299     int i_index;
 300     playlist_t * p_playlist = self->p_playlist;
 301     int i_playlist_size;
 302
 303     exception=mediacontrol_exception_init( exception );
 304     if( !p_playlist )
 305     {
 306         RAISE( mediacontrol_PlaylistException, "No playlist" );
 307         return NULL;
 308     }
 309
 310     vlc_mutex_lock( &p_playlist->object_lock );
 311     i_playlist_size = p_playlist->i_size;
 312
 313     retval = mediacontrol_PlaylistSeq__alloc( i_playlist_size );
 314
 315     for( i_index = 0 ; i_index < i_playlist_size ; i_index++ )
 316     {
 317         retval->data[i_index] = strdup( p_playlist->pp_items[i_index]->input.psz_uri );
 318     }
 319     vlc_mutex_unlock( &p_playlist->object_lock );
 320
 321     return retval;
 322 }
 323
 324 /***************************************************************************
 325  * Status feedback
 326  ***************************************************************************/
 327
 328 mediacontrol_StreamInformation *
 329 mediacontrol_get_stream_information( mediacontrol_Instance *self,
 330                                      mediacontrol_PositionKey a_key,
 331                                      mediacontrol_Exception *exception )
 332 {
 333     mediacontrol_StreamInformation *retval;
 334     input_thread_t *p_input = self->p_playlist->p_input;
 335     vlc_value_t val;
 336
 337     retval = ( mediacontrol_StreamInformation* )malloc( sizeof( mediacontrol_StreamInformation ) );
 338     if( ! retval )
 339     {
 340         RAISE( mediacontrol_InternalException, "Out of memory" );
 341         return NULL;
 342     }
 343
 344     if( ! p_input )
 345     {
 346         /* No p_input defined */
 347         retval->streamstatus = mediacontrol_UndefinedStatus;
 348         retval->url          = strdup( "None" );
 349         retval->position     = 0;
 350         retval->length       = 0;
 351     }
 352     else
 353     {
 354         switch( var_GetInteger( p_input, "state" ) )
 355         {
 356         case PLAYING_S     :
 357             retval->streamstatus = mediacontrol_PlayingStatus;
 358             break;
 359         case PAUSE_S       :
 360             retval->streamstatus = mediacontrol_PauseStatus;
 361             break;
 362         case INIT_S        :
 363             retval->streamstatus = mediacontrol_InitStatus;
 364             break;
 365         case END_S         :
 366             retval->streamstatus = mediacontrol_EndStatus;
 367             break;
 368         default :
 369             retval->streamstatus = mediacontrol_UndefinedStatus;
 370             break;
 371         }
 372
 373         retval->url = strdup( p_input->input.p_item->psz_uri );
 374
 375         /* TIME and LENGTH are in microseconds. We want them in ms */
 376         var_Get( p_input, "time", &val);
 377         retval->position = val.i_time / 1000;
 378
 379         var_Get( p_input, "length", &val);
 380         retval->length = val.i_time / 1000;
 381
 382         retval->position = mediacontrol_unit_convert( p_input,
 383                                                       mediacontrol_MediaTime, a_key,
 384                                                       retval->position );
 385         retval->length   = mediacontrol_unit_convert( p_input,
 386                                                       mediacontrol_MediaTime, a_key,
 387                                                       retval->length );
 388     }
 389     return retval;
 390 }