bindings/mediacontrol/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 #ifdef HAVE_CONFIG_H
  25 # include "config.h"
  26 #endif
  27
  28 #include "mediacontrol_internal.h"
  29 #include <vlc/mediacontrol.h>
  30
  31 #include <vlc/libvlc.h>
  32 #include <vlc_common.h>
  33 #include <vlc_interface.h>
  34 #include <vlc_playlist.h>
  35
  36 #include <vlc_vout.h>
  37 #include <vlc_aout.h>
  38 #include <vlc_input.h>
  39 #include <vlc_osd.h>
  40
  41 #include <stdlib.h>                                      /* malloc(), free() */
  42 #include <string.h>
  43
  44 #include <stdio.h>
  45
  46 #ifdef HAVE_UNISTD_H
  47 #    include <unistd.h>
  48 #endif
  49 #include <sys/types.h>
  50
  51 mediacontrol_Instance* mediacontrol_new( int argc, char** argv, mediacontrol_Exception *exception )
  52 {
  53     mediacontrol_Instance* retval;
  54     mediacontrol_exception_init( exception );
  55
  56     retval = ( mediacontrol_Instance* )malloc( sizeof( mediacontrol_Instance ) );
  57     if( !retval )
  58         RAISE_NULL( mediacontrol_InternalException, "Out of memory" );
  59
  60     retval->p_instance = libvlc_new( argc, (const char**)argv );
  61     if( !retval->p_instance )
  62         RAISE_NULL( mediacontrol_InternalException, "Out of memory" );
  63     retval->p_media_player = libvlc_media_player_new( retval->p_instance );
  64     if( !retval->p_media_player )
  65         RAISE_NULL( mediacontrol_InternalException, "Out of memory" );
  66     return retval;
  67 }
  68
  69 void
  70 mediacontrol_exit( mediacontrol_Instance *self )
  71 {
  72     libvlc_release( self->p_instance );
  73 }
  74
  75 libvlc_instance_t*
  76 mediacontrol_get_libvlc_instance( mediacontrol_Instance *self )
  77 {
  78     return self->p_instance;
  79 }
  80
  81 libvlc_media_player_t*
  82 mediacontrol_get_media_player( mediacontrol_Instance *self )
  83 {
  84     return self->p_media_player;
  85 }
  86
  87 mediacontrol_Instance *
  88 mediacontrol_new_from_instance( libvlc_instance_t* p_instance,
  89                 mediacontrol_Exception *exception )
  90 {
  91     mediacontrol_Instance* retval;
  92
  93     retval = ( mediacontrol_Instance* )malloc( sizeof( mediacontrol_Instance ) );
  94     if( ! retval )
  95     {
  96         RAISE_NULL( mediacontrol_InternalException, "Out of memory" );
  97     }
  98     retval->p_instance = p_instance;
  99     retval->p_media_player = libvlc_media_player_new( retval->p_instance );
 100     if( ! retval->p_media_player )
 101          RAISE_NULL( mediacontrol_InternalException, "Out of memory" );
 102     return retval;
 103 }
 104
 105 /**************************************************************************
 106  * Playback management
 107  **************************************************************************/
 108 mediacontrol_Position*
 109 mediacontrol_get_media_position( mediacontrol_Instance *self,
 110                                  const mediacontrol_PositionOrigin an_origin,
 111                                  const mediacontrol_PositionKey a_key,
 112                                  mediacontrol_Exception *exception )
 113 {
 114     mediacontrol_Position* retval = NULL;
 115     int64_t pos;
 116
 117     mediacontrol_exception_init( exception );
 118
 119     retval = ( mediacontrol_Position* )malloc( sizeof( mediacontrol_Position ) );
 120     retval->origin = an_origin;
 121     retval->key = a_key;
 122
 123     if(  an_origin != mediacontrol_AbsolutePosition )
 124     {
 125         free( retval );
 126         /* Relative or ModuloPosition make no sense */
 127         RAISE_NULL( mediacontrol_PositionOriginNotSupported,
 128                     "Only absolute position is valid." );
 129     }
 130
 131     /* We are asked for an AbsolutePosition. */
 132     pos = libvlc_media_player_get_time( self->p_media_player );
 133
 134     if( a_key == mediacontrol_MediaTime )
 135     {
 136         retval->value = pos;
 137     }
 138     else
 139     {
 140         retval->value = private_mediacontrol_unit_convert( self->p_media_player,
 141                                                            mediacontrol_MediaTime,
 142                                                            a_key,
 143                                                            pos );
 144     }
 145     return retval;
 146 }
 147
 148 /* Sets the media position */
 149 void
 150 mediacontrol_set_media_position( mediacontrol_Instance *self,
 151                                  const mediacontrol_Position * a_position,
 152                                  mediacontrol_Exception *exception )
 153 {
 154     int64_t i_pos;
 155
 156     mediacontrol_exception_init( exception );
 157
 158     i_pos = private_mediacontrol_position2microsecond( self->p_media_player, a_position );
 159     libvlc_media_player_set_time( self->p_media_player, i_pos / 1000 );
 160 }
 161
 162 /* Starts playing a stream */
 163 /*
 164  * Known issues: since moving in the playlist using playlist_Next
 165  * or playlist_Prev implies starting to play items, the a_position
 166  * argument will be only honored for the 1st item in the list.
 167  *
 168  * XXX:FIXME split moving in the playlist and playing items two
 169  * different actions or make playlist_<Next|Prev> accept a time
 170  * value to start to play from.
 171  */
 172 void
 173 mediacontrol_start( mediacontrol_Instance *self,
 174                     const mediacontrol_Position * a_position,
 175                     mediacontrol_Exception *exception )
 176 {
 177     libvlc_media_t * p_media;
 178     char * psz_name;
 179     libvlc_exception_t ex;
 180
 181     mediacontrol_exception_init( exception );
 182     libvlc_exception_init( &ex );
 183
 184     p_media = libvlc_media_player_get_media( self->p_media_player );
 185
 186     if ( ! p_media )
 187     {
 188         /* No media was defined. */
 189         RAISE( mediacontrol_PlaylistException, "No defined media." );
 190     }
 191     else
 192     {
 193         /* A media was defined. Get its mrl to reuse it, but reset the options
 194            (because start-time may have been set on the previous invocation */
 195         psz_name = libvlc_media_get_mrl( p_media );
 196         HANDLE_LIBVLC_EXCEPTION_VOID( &ex );
 197
 198         /* Create a new media */
 199         p_media = libvlc_media_new_location( self->p_instance, psz_name, &ex );
 200         HANDLE_LIBVLC_EXCEPTION_VOID( &ex );
 201
 202         if( a_position->value )
 203         {
 204             char * psz_from;
 205             libvlc_time_t i_from;
 206
 207             /* A start position was specified. Add it to media options */
 208             psz_from = ( char * )malloc( 20 * sizeof( char ) );
 209             i_from = private_mediacontrol_position2microsecond( self->p_media_player, a_position ) / 1000000;
 210             snprintf( psz_from, 20, "start-time=%"PRId64, i_from );
 211             libvlc_media_add_option( p_media, psz_from );
 212             HANDLE_LIBVLC_EXCEPTION_VOID( &ex );
 213         }
 214
 215         libvlc_media_player_set_media( self->p_media_player, p_media );
 216
 217         libvlc_media_player_play( self->p_media_player );
 218     }
 219 }
 220
 221 void
 222 mediacontrol_pause( mediacontrol_Instance *self,
 223                     mediacontrol_Exception *exception )
 224 {
 225     mediacontrol_exception_init( exception );
 226     libvlc_media_player_pause( self->p_media_player );
 227 }
 228
 229 void
 230 mediacontrol_resume( mediacontrol_Instance *self,
 231                      mediacontrol_Exception *exception )
 232 {
 233     mediacontrol_exception_init( exception );
 234     libvlc_media_player_pause( self->p_media_player );
 235 }
 236
 237 void
 238 mediacontrol_stop( mediacontrol_Instance *self,
 239                    mediacontrol_Exception *exception )
 240 {
 241     mediacontrol_exception_init( exception );
 242     libvlc_media_player_stop( self->p_media_player );
 243 }
 244
 245 /**************************************************************************
 246  * File management
 247  **************************************************************************/
 248
 249 void
 250 mediacontrol_set_mrl( mediacontrol_Instance *self,
 251                       const char * psz_file,
 252                       mediacontrol_Exception *exception )
 253 {
 254     libvlc_media_t * p_media;
 255     libvlc_exception_t ex;
 256
 257     mediacontrol_exception_init( exception );
 258     libvlc_exception_init( &ex );
 259
 260     p_media = libvlc_media_new_location( self->p_instance, psz_file, &ex );
 261     HANDLE_LIBVLC_EXCEPTION_VOID( &ex );
 262
 263     libvlc_media_player_set_media( self->p_media_player, p_media );
 264 }
 265
 266 char *
 267 mediacontrol_get_mrl( mediacontrol_Instance *self,
 268                       mediacontrol_Exception *exception )
 269 {
 270     libvlc_media_t * p_media;
 271     libvlc_exception_t ex;
 272
 273     mediacontrol_exception_init( exception );
 274     libvlc_exception_init( &ex );
 275
 276     p_media = libvlc_media_player_get_media( self->p_media_player );
 277
 278     if ( ! p_media )
 279     {
 280         return strdup( "" );
 281     }
 282     else
 283     {
 284         char * psz_mrl;
 285
 286         psz_mrl = libvlc_media_get_mrl( p_media );
 287         HANDLE_LIBVLC_EXCEPTION_NULL( &ex );
 288         return psz_mrl;
 289     }
 290 }
 291
 292 /***************************************************************************
 293  * Status feedback
 294  ***************************************************************************/
 295
 296 mediacontrol_StreamInformation *
 297 mediacontrol_get_stream_information( mediacontrol_Instance *self,
 298                                      mediacontrol_PositionKey a_key,
 299                                      mediacontrol_Exception *exception )
 300 {
 301     (void)a_key;
 302     mediacontrol_StreamInformation *retval = NULL;
 303     libvlc_media_t * p_media;
 304     libvlc_exception_t ex;
 305
 306     libvlc_exception_init( &ex );
 307
 308     retval = ( mediacontrol_StreamInformation* )
 309                             malloc( sizeof( mediacontrol_StreamInformation ) );
 310     if( ! retval )
 311     {
 312         RAISE( mediacontrol_InternalException, "Out of memory" );
 313         return NULL;
 314     }
 315
 316     p_media = libvlc_media_player_get_media( self->p_media_player );
 317     if( ! p_media )
 318     {
 319         /* No p_media defined */
 320         retval->streamstatus = mediacontrol_UndefinedStatus;
 321         retval->url          = strdup( "" );
 322         retval->position     = 0;
 323         retval->length       = 0;
 324     }
 325     else
 326     {
 327         libvlc_state_t state;
 328
 329         state = libvlc_media_player_get_state( self->p_media_player );
 330         switch( state )
 331         {
 332         case libvlc_NothingSpecial:
 333             retval->streamstatus = mediacontrol_UndefinedStatus;
 334             break;
 335         case libvlc_Opening :
 336             retval->streamstatus = mediacontrol_InitStatus;
 337             break;
 338         case libvlc_Buffering:
 339             retval->streamstatus = mediacontrol_BufferingStatus;
 340             break;
 341         case libvlc_Playing:
 342             retval->streamstatus = mediacontrol_PlayingStatus;
 343             break;
 344         case libvlc_Paused:
 345             retval->streamstatus = mediacontrol_PauseStatus;
 346             break;
 347         case libvlc_Stopped:
 348             retval->streamstatus = mediacontrol_StopStatus;
 349             break;
 350         case libvlc_Ended:
 351             retval->streamstatus = mediacontrol_EndStatus;
 352             break;
 353         case libvlc_Error:
 354             retval->streamstatus = mediacontrol_ErrorStatus;
 355             break;
 356         default :
 357             retval->streamstatus = mediacontrol_UndefinedStatus;
 358             break;
 359         }
 360
 361         retval->url = libvlc_media_get_mrl( p_media );
 362
 363         retval->position = libvlc_media_player_get_time( self->p_media_player );
 364         retval->length = libvlc_media_player_get_length( self->p_media_player );
 365     }
 366     return retval;
 367 }