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 #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 <errno.h>                                                 /* ENOMEM */
  45 #include <stdio.h>
  46 #include <ctype.h>
  47
  48 #ifdef HAVE_UNISTD_H
  49 #    include <unistd.h>
  50 #endif
  51 #ifdef HAVE_SYS_TIME_H
  52 #    include <sys/time.h>
  53 #endif
  54 #ifdef HAVE_SYS_TYPES_H
  55 #    include <sys/types.h>
  56 #endif
  57
  58 mediacontrol_Instance* mediacontrol_new( int argc, char** argv, mediacontrol_Exception *exception )
  59 {
  60     mediacontrol_Instance* retval;
  61     libvlc_exception_t ex;
  62
  63     libvlc_exception_init( &ex );
  64     mediacontrol_exception_init( exception );
  65
  66     retval = ( mediacontrol_Instance* )malloc( sizeof( mediacontrol_Instance ) );
  67     if( !retval )
  68         RAISE_NULL( mediacontrol_InternalException, "Out of memory" );
  69
  70     retval->p_instance = libvlc_new( argc, (const char**)argv, &ex );
  71     HANDLE_LIBVLC_EXCEPTION_NULL( &ex );
  72     retval->p_media_player = libvlc_media_player_new( retval->p_instance, &ex );
  73     HANDLE_LIBVLC_EXCEPTION_NULL( &ex );
  74     return retval;
  75 }
  76
  77 void
  78 mediacontrol_exit( mediacontrol_Instance *self )
  79 {
  80     libvlc_release( self->p_instance );
  81 }
  82
  83 libvlc_instance_t*
  84 mediacontrol_get_libvlc_instance( mediacontrol_Instance *self )
  85 {
  86     return self->p_instance;
  87 }
  88
  89 libvlc_media_player_t*
  90 mediacontrol_get_media_player( mediacontrol_Instance *self )
  91 {
  92     return self->p_media_player;
  93 }
  94
  95 mediacontrol_Instance *
  96 mediacontrol_new_from_instance( libvlc_instance_t* p_instance,
  97                 mediacontrol_Exception *exception )
  98 {
  99     mediacontrol_Instance* retval;
 100     libvlc_exception_t ex;
 101
 102     libvlc_exception_init( &ex );
 103
 104     retval = ( mediacontrol_Instance* )malloc( sizeof( mediacontrol_Instance ) );
 105     if( ! retval )
 106     {
 107         RAISE_NULL( mediacontrol_InternalException, "Out of memory" );
 108     }
 109     retval->p_instance = p_instance;
 110     retval->p_media_player = libvlc_media_player_new( retval->p_instance, &ex );
 111     HANDLE_LIBVLC_EXCEPTION_NULL( &ex );
 112     return retval;
 113 }
 114
 115 /**************************************************************************
 116  * Playback management
 117  **************************************************************************/
 118 mediacontrol_Position*
 119 mediacontrol_get_media_position( mediacontrol_Instance *self,
 120                                  const mediacontrol_PositionOrigin an_origin,
 121                                  const mediacontrol_PositionKey a_key,
 122                                  mediacontrol_Exception *exception )
 123 {
 124     mediacontrol_Position* retval = NULL;
 125     libvlc_exception_t ex;
 126     int64_t pos;
 127
 128     mediacontrol_exception_init( exception );
 129     libvlc_exception_init( &ex );
 130
 131     retval = ( mediacontrol_Position* )malloc( sizeof( mediacontrol_Position ) );
 132     retval->origin = an_origin;
 133     retval->key = a_key;
 134
 135     if(  an_origin != mediacontrol_AbsolutePosition )
 136     {
 137         free( retval );
 138         /* Relative or ModuloPosition make no sense */
 139         RAISE_NULL( mediacontrol_PositionOriginNotSupported,
 140                     "Only absolute position is valid." );
 141     }
 142
 143     /* We are asked for an AbsolutePosition. */
 144     pos = libvlc_media_player_get_time( self->p_media_player, &ex );
 145
 146     if( a_key == mediacontrol_MediaTime )
 147     {
 148         retval->value = pos;
 149     }
 150     else
 151     {
 152         retval->value = private_mediacontrol_unit_convert( self->p_media_player,
 153                                                            mediacontrol_MediaTime,
 154                                                            a_key,
 155                                                            pos );
 156     }
 157     return retval;
 158 }
 159
 160 /* Sets the media position */
 161 void
 162 mediacontrol_set_media_position( mediacontrol_Instance *self,
 163                                  const mediacontrol_Position * a_position,
 164                                  mediacontrol_Exception *exception )
 165 {
 166     libvlc_exception_t ex;
 167     int64_t i_pos;
 168
 169     libvlc_exception_init( &ex );
 170     mediacontrol_exception_init( exception );
 171
 172     i_pos = private_mediacontrol_position2microsecond( self->p_media_player, a_position );
 173     libvlc_media_player_set_time( self->p_media_player, i_pos / 1000, &ex );
 174     HANDLE_LIBVLC_EXCEPTION_VOID( &ex );
 175 }
 176
 177 /* Starts playing a stream */
 178 /*
 179  * Known issues: since moving in the playlist using playlist_Next
 180  * or playlist_Prev implies starting to play items, the a_position
 181  * argument will be only honored for the 1st item in the list.
 182  *
 183  * XXX:FIXME split moving in the playlist and playing items two
 184  * different actions or make playlist_<Next|Prev> accept a time
 185  * value to start to play from.
 186  */
 187 void
 188 mediacontrol_start( mediacontrol_Instance *self,
 189                     const mediacontrol_Position * a_position,
 190                     mediacontrol_Exception *exception )
 191 {
 192     libvlc_media_t * p_media;
 193     char * psz_name;
 194     libvlc_exception_t ex;
 195
 196     mediacontrol_exception_init( exception );
 197     libvlc_exception_init( &ex );
 198
 199     p_media = libvlc_media_player_get_media( self->p_media_player, &ex );
 200     HANDLE_LIBVLC_EXCEPTION_VOID( &ex );
 201
 202     if ( ! p_media )
 203     {
 204         /* No media was defined. */
 205         RAISE( mediacontrol_PlaylistException, "No defined media." );
 206     }
 207     else
 208     {
 209         /* A media was defined. Get its mrl to reuse it, but reset the options
 210            (because start-time may have been set on the previous invocation */
 211         psz_name = libvlc_media_get_mrl( p_media, &ex );
 212         HANDLE_LIBVLC_EXCEPTION_VOID( &ex );
 213
 214         /* Create a new media */
 215         p_media = libvlc_media_new( self->p_instance, psz_name, &ex );
 216         HANDLE_LIBVLC_EXCEPTION_VOID( &ex );
 217
 218         if( a_position->value )
 219         {
 220             char * psz_from;
 221             libvlc_time_t i_from;
 222
 223             /* A start position was specified. Add it to media options */
 224             psz_from = ( char * )malloc( 20 * sizeof( char ) );
 225             i_from = private_mediacontrol_position2microsecond( self->p_media_player, a_position ) / 1000000;
 226             snprintf( psz_from, 20, "start-time=%"PRId64, i_from );
 227             libvlc_media_add_option( p_media, psz_from, &ex );
 228             HANDLE_LIBVLC_EXCEPTION_VOID( &ex );
 229         }
 230
 231         libvlc_media_player_set_media( self->p_media_player, p_media, &ex );
 232         HANDLE_LIBVLC_EXCEPTION_VOID( &ex );
 233
 234         libvlc_media_player_play( self->p_media_player, &ex );
 235         HANDLE_LIBVLC_EXCEPTION_VOID( &ex );
 236     }
 237 }
 238
 239 void
 240 mediacontrol_pause( mediacontrol_Instance *self,
 241                     mediacontrol_Exception *exception )
 242 {
 243     libvlc_exception_t ex;
 244
 245     mediacontrol_exception_init( exception );
 246     libvlc_exception_init( &ex );
 247     libvlc_media_player_pause( self->p_media_player, &ex );
 248     HANDLE_LIBVLC_EXCEPTION_VOID( &ex );
 249 }
 250
 251 void
 252 mediacontrol_resume( mediacontrol_Instance *self,
 253                      mediacontrol_Exception *exception )
 254 {
 255     libvlc_exception_t ex;
 256
 257     mediacontrol_exception_init( exception );
 258     libvlc_exception_init( &ex );
 259     libvlc_media_player_pause( self->p_media_player, &ex );
 260     HANDLE_LIBVLC_EXCEPTION_VOID( &ex );
 261 }
 262
 263 void
 264 mediacontrol_stop( mediacontrol_Instance *self,
 265                    mediacontrol_Exception *exception )
 266 {
 267     libvlc_exception_t ex;
 268
 269     mediacontrol_exception_init( exception );
 270     libvlc_exception_init( &ex );
 271     libvlc_media_player_stop( self->p_media_player, &ex );
 272     HANDLE_LIBVLC_EXCEPTION_VOID( &ex );
 273 }
 274
 275 /**************************************************************************
 276  * File management
 277  **************************************************************************/
 278
 279 void
 280 mediacontrol_set_mrl( mediacontrol_Instance *self,
 281                       const char * psz_file,
 282                       mediacontrol_Exception *exception )
 283 {
 284     libvlc_media_t * p_media;
 285     libvlc_exception_t ex;
 286
 287     mediacontrol_exception_init( exception );
 288     libvlc_exception_init( &ex );
 289
 290     p_media = libvlc_media_new( self->p_instance, psz_file, &ex );
 291     HANDLE_LIBVLC_EXCEPTION_VOID( &ex );
 292
 293     libvlc_media_player_set_media( self->p_media_player, p_media, &ex );
 294     HANDLE_LIBVLC_EXCEPTION_VOID( &ex );
 295 }
 296
 297 char *
 298 mediacontrol_get_mrl( mediacontrol_Instance *self,
 299                       mediacontrol_Exception *exception )
 300 {
 301     libvlc_media_t * p_media;
 302     libvlc_exception_t ex;
 303
 304     mediacontrol_exception_init( exception );
 305     libvlc_exception_init( &ex );
 306
 307     p_media = libvlc_media_player_get_media( self->p_media_player, &ex );
 308     HANDLE_LIBVLC_EXCEPTION_NULL( &ex );
 309
 310     if ( ! p_media )
 311     {
 312         return strdup( "" );
 313     }
 314     else
 315     {
 316         char * psz_mrl;
 317
 318         psz_mrl = libvlc_media_get_mrl( p_media, &ex );
 319         HANDLE_LIBVLC_EXCEPTION_NULL( &ex );
 320         return psz_mrl;
 321     }
 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 = NULL;
 334     libvlc_media_t * p_media;
 335     libvlc_exception_t ex;
 336
 337     libvlc_exception_init( &ex );
 338
 339     retval = ( mediacontrol_StreamInformation* )
 340                             malloc( sizeof( mediacontrol_StreamInformation ) );
 341     if( ! retval )
 342     {
 343         RAISE( mediacontrol_InternalException, "Out of memory" );
 344         return NULL;
 345     }
 346
 347     p_media = libvlc_media_player_get_media( self->p_media_player, &ex );
 348     HANDLE_LIBVLC_EXCEPTION_NULL( &ex );
 349     if( ! p_media )
 350     {
 351         /* No p_media defined */
 352         retval->streamstatus = mediacontrol_UndefinedStatus;
 353         retval->url          = strdup( "" );
 354         retval->position     = 0;
 355         retval->length       = 0;
 356     }
 357     else
 358     {
 359         libvlc_state_t state;
 360         state = libvlc_media_player_get_state( self->p_media_player, &ex );
 361         HANDLE_LIBVLC_EXCEPTION_NULL( &ex );
 362         switch( state )
 363         {
 364         case libvlc_NothingSpecial:
 365             retval->streamstatus = mediacontrol_UndefinedStatus;
 366             break;
 367         case libvlc_Opening :
 368             retval->streamstatus = mediacontrol_InitStatus;
 369             break;
 370         case libvlc_Buffering:
 371             retval->streamstatus = mediacontrol_BufferingStatus;
 372             break;
 373         case libvlc_Playing:
 374             retval->streamstatus = mediacontrol_PlayingStatus;
 375             break;
 376         case libvlc_Paused:
 377             retval->streamstatus = mediacontrol_PauseStatus;
 378             break;
 379         case libvlc_Stopped:
 380             retval->streamstatus = mediacontrol_StopStatus;
 381             break;
 382         case libvlc_Forward:
 383             retval->streamstatus = mediacontrol_ForwardStatus;
 384             break;
 385         case libvlc_Backward:
 386             retval->streamstatus = mediacontrol_BackwardStatus;
 387             break;
 388         case libvlc_Ended:
 389             retval->streamstatus = mediacontrol_EndStatus;
 390             break;
 391         case libvlc_Error:
 392             retval->streamstatus = mediacontrol_ErrorStatus;
 393             break;
 394         default :
 395             retval->streamstatus = mediacontrol_UndefinedStatus;
 396             break;
 397         }
 398
 399         retval->url = libvlc_media_get_mrl( p_media, &ex );
 400
 401         /* TIME and LENGTH are in microseconds. We want them in ms */
 402         retval->position = libvlc_media_player_get_time( self->p_media_player, &ex );
 403
 404         retval->length = libvlc_media_player_get_length( self->p_media_player, &ex );
 405
 406         retval->position = private_mediacontrol_unit_convert( self->p_media_player,
 407                                          mediacontrol_MediaTime, a_key,
 408                                          retval->position );
 409         retval->length   = private_mediacontrol_unit_convert( self->p_media_player,
 410                                          mediacontrol_MediaTime, a_key,
 411                                          retval->length );
 412     }
 413     return retval;
 414 }