git.sesse.net Git - vlc/blob - modules/lua/libs/playlist.c

   1 /*****************************************************************************
   2  * playlist.c
   3  *****************************************************************************
   4  * Copyright (C) 2007-2011 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Antoine Cellerier <dionoea at videolan tod org>
   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 /*****************************************************************************
  25  * Preamble
  26  *****************************************************************************/
  27 #ifndef  _GNU_SOURCE
  28 #   define  _GNU_SOURCE
  29 #endif
  30
  31 #ifdef HAVE_CONFIG_H
  32 # include "config.h"
  33 #endif
  34
  35 #include <vlc_common.h>
  36
  37 #include <vlc_interface.h>
  38 #include <vlc_playlist.h>
  39
  40 #include "../vlc.h"
  41 #include "../libs.h"
  42 #include "input.h"
  43 #include "variables.h"
  44 #include "misc.h"
  45
  46 void vlclua_set_playlist_internal( lua_State *L, playlist_t *pl )
  47 {
  48     vlclua_set_object( L, vlclua_set_playlist_internal, pl );
  49 }
  50
  51 playlist_t *vlclua_get_playlist_internal( lua_State *L )
  52 {
  53     return vlclua_get_object( L, vlclua_set_playlist_internal );
  54 }
  55
  56 static int vlclua_playlist_prev( lua_State * L )
  57 {
  58     playlist_t *p_playlist = vlclua_get_playlist_internal( L );
  59     playlist_Prev( p_playlist );
  60     return 0;
  61 }
  62
  63 static int vlclua_playlist_next( lua_State * L )
  64 {
  65     playlist_t *p_playlist = vlclua_get_playlist_internal( L );
  66     playlist_Next( p_playlist );
  67     return 0;
  68 }
  69
  70 static int vlclua_playlist_skip( lua_State * L )
  71 {
  72     int i_skip = luaL_checkint( L, 1 );
  73     playlist_t *p_playlist = vlclua_get_playlist_internal( L );
  74     playlist_Skip( p_playlist, i_skip );
  75     return 0;
  76 }
  77
  78 static int vlclua_playlist_play( lua_State * L )
  79 {
  80     playlist_t *p_playlist = vlclua_get_playlist_internal( L );
  81     playlist_Play( p_playlist );
  82     return 0;
  83 }
  84
  85 static int vlclua_playlist_pause( lua_State * L )
  86 {
  87     playlist_t *p_playlist = vlclua_get_playlist_internal( L );
  88     playlist_Pause( p_playlist );
  89     return 0;
  90 }
  91
  92 static int vlclua_playlist_stop( lua_State * L )
  93 {
  94     playlist_t *p_playlist = vlclua_get_playlist_internal( L );
  95     playlist_Stop( p_playlist );
  96     return 0;
  97 }
  98
  99 static int vlclua_playlist_clear( lua_State * L )
 100 {
 101     playlist_t *p_playlist = vlclua_get_playlist_internal( L );
 102     playlist_Stop( p_playlist ); /* Isn't this already implied by Clear? */
 103     playlist_Clear( p_playlist, pl_Unlocked );
 104     return 0;
 105 }
 106
 107 static int vlclua_playlist_repeat( lua_State * L )
 108 {
 109     playlist_t *p_playlist = vlclua_get_playlist_internal( L );
 110     int i_ret = vlclua_var_toggle_or_set( L, p_playlist, "repeat" );
 111     return i_ret;
 112 }
 113
 114 static int vlclua_playlist_loop( lua_State * L )
 115 {
 116     playlist_t *p_playlist = vlclua_get_playlist_internal( L );
 117     int i_ret = vlclua_var_toggle_or_set( L, p_playlist, "loop" );
 118     return i_ret;
 119 }
 120
 121 static int vlclua_playlist_random( lua_State * L )
 122 {
 123     playlist_t *p_playlist = vlclua_get_playlist_internal( L );
 124     int i_ret = vlclua_var_toggle_or_set( L, p_playlist, "random" );
 125     return i_ret;
 126 }
 127
 128 static int vlclua_playlist_gotoitem( lua_State * L )
 129 {
 130     int i_id = luaL_checkint( L, 1 );
 131     playlist_t *p_playlist = vlclua_get_playlist_internal( L );
 132     PL_LOCK;
 133     playlist_Control( p_playlist, PLAYLIST_VIEWPLAY, true, NULL,
 134                       playlist_ItemGetById( p_playlist, i_id ) );
 135     PL_UNLOCK;
 136     return vlclua_push_ret( L, VLC_SUCCESS );
 137 }
 138
 139 static int vlclua_playlist_delete( lua_State * L )
 140 {
 141     int i_id = luaL_checkint( L, 1 );
 142     playlist_t *p_playlist = vlclua_get_playlist_internal( L );
 143     PL_LOCK;
 144     playlist_item_t *p_item = playlist_ItemGetById( p_playlist, i_id );
 145     if( !p_item )
 146     {
 147        PL_UNLOCK;
 148        return vlclua_push_ret( L, -1 );
 149     }
 150     int i_ret = playlist_DeleteFromInput( p_playlist, p_item -> p_input, true );
 151     PL_UNLOCK;
 152     return vlclua_push_ret( L, i_ret );
 153 }
 154
 155 static int vlclua_playlist_move( lua_State * L )
 156 {
 157     int i_item = luaL_checkint( L, 1 );
 158     int i_target = luaL_checkint( L, 2 );
 159     playlist_t *p_playlist = vlclua_get_playlist_internal( L );
 160     PL_LOCK;
 161     playlist_item_t *p_item = playlist_ItemGetById( p_playlist, i_item );
 162     playlist_item_t *p_target = playlist_ItemGetById( p_playlist, i_target );
 163     if( !p_item || !p_target )
 164     {
 165        PL_UNLOCK;
 166        return vlclua_push_ret( L, -1 );
 167     }
 168     int i_ret;
 169     if( p_target->i_children != -1 )
 170         i_ret = playlist_TreeMove( p_playlist, p_item, p_target, 0 );
 171     else
 172         i_ret = playlist_TreeMove( p_playlist, p_item, p_target->p_parent, p_target->i_id - p_target->p_parent->pp_children[0]->i_id + 1 );
 173     PL_UNLOCK;
 174     return vlclua_push_ret( L, i_ret );
 175 }
 176
 177 static int vlclua_playlist_add( lua_State *L )
 178 {
 179     int i_count;
 180     vlc_object_t *p_this = vlclua_get_this( L );
 181     playlist_t *p_playlist = vlclua_get_playlist_internal( L );
 182     i_count = vlclua_playlist_add_internal( p_this, L, p_playlist,
 183                                             NULL, true );
 184     lua_pushinteger( L, i_count );
 185     return 1;
 186 }
 187
 188 static int vlclua_playlist_enqueue( lua_State *L )
 189 {
 190     int i_count;
 191     vlc_object_t *p_this = vlclua_get_this( L );
 192     playlist_t *p_playlist = vlclua_get_playlist_internal( L );
 193     i_count = vlclua_playlist_add_internal( p_this, L, p_playlist,
 194                                             NULL, false );
 195     lua_pushinteger( L, i_count );
 196     return 1;
 197 }
 198
 199 static void push_playlist_item( lua_State *L, playlist_item_t *p_item )
 200 {
 201     input_item_t *p_input = p_item->p_input;
 202     int i_flags = 0;
 203     i_flags = p_item->i_flags;
 204     lua_newtable( L );
 205     lua_pushinteger( L, p_item->i_id );
 206     lua_setfield( L, -2, "id" );
 207     lua_newtable( L );
 208 #define CHECK_AND_SET_FLAG( name, label ) \
 209     if( i_flags & PLAYLIST_ ## name ## _FLAG ) \
 210     { \
 211         lua_pushboolean( L, 1 ); \
 212         lua_setfield( L, -2, #label ); \
 213     }
 214     CHECK_AND_SET_FLAG( SAVE, save )
 215     CHECK_AND_SET_FLAG( SKIP, skip )
 216     CHECK_AND_SET_FLAG( DBL, disabled )
 217     CHECK_AND_SET_FLAG( RO, ro )
 218     CHECK_AND_SET_FLAG( REMOVE, remove )
 219     CHECK_AND_SET_FLAG( EXPANDED, expanded )
 220 #undef CHECK_AND_SET_FLAG
 221     lua_setfield( L, -2, "flags" );
 222     if( p_input )
 223     {
 224         char *psz_name = input_item_GetTitleFbName( p_input );
 225         lua_pushstring( L, psz_name );
 226         free( psz_name );
 227         lua_setfield( L, -2, "name" );
 228         lua_pushstring( L, p_input->psz_uri );
 229         lua_setfield( L, -2, "path" );
 230         if( p_input->i_duration < 0 )
 231             lua_pushnumber( L, -1 );
 232         else
 233             lua_pushnumber( L, ((double)p_input->i_duration)*1e-6 );
 234         lua_setfield( L, -2, "duration" );
 235         lua_pushinteger( L, p_item->i_nb_played );
 236         lua_setfield( L, -2, "nb_played" );
 237         luaopen_input_item( L, p_input );
 238         /* TODO: add (optional) info categories, meta, options, es */
 239     }
 240     if( p_item->i_children >= 0 )
 241     {
 242         int i;
 243         lua_createtable( L, p_item->i_children, 0 );
 244         for( i = 0; i < p_item->i_children; i++ )
 245         {
 246             push_playlist_item( L, p_item->pp_children[i] );
 247             lua_rawseti( L, -2, i+1 );
 248         }
 249         lua_setfield( L, -2, "children" );
 250     }
 251 }
 252
 253 static int vlclua_playlist_get( lua_State *L )
 254 {
 255     playlist_t *p_playlist = vlclua_get_playlist_internal( L );
 256     PL_LOCK;
 257     playlist_item_t *p_item = NULL;
 258
 259     if( lua_isnumber( L, 1 ) )
 260     {
 261         int i_id = lua_tointeger( L, 1 );
 262         p_item = playlist_ItemGetById( p_playlist, i_id );
 263         if( !p_item )
 264         {
 265             PL_UNLOCK;
 266             return 0; /* Should we return an error instead? */
 267         }
 268     }
 269     else if( lua_isstring( L, 1 ) )
 270     {
 271         const char *psz_what = lua_tostring( L, 1 );
 272         if( !strcasecmp( psz_what, "normal" )
 273          || !strcasecmp( psz_what, "playlist" ) )
 274             p_item = p_playlist->p_playing;
 275         else if( !strcasecmp( psz_what, "ml" )
 276               || !strcasecmp( psz_what, "media library" ) )
 277             p_item = p_playlist->p_media_library;
 278         else if( !strcasecmp( psz_what, "root" ) )
 279             p_item = p_playlist->p_root;
 280         else
 281         {
 282             /* currently, psz_what must be SD module's longname! */
 283             p_item = playlist_ChildSearchName( p_playlist->p_root, psz_what );
 284
 285             if( !p_item )
 286             {
 287                 PL_UNLOCK;
 288                 return 0; /* Should we return an error instead? */
 289             }
 290         }
 291     }
 292     else
 293     {
 294         p_item = p_playlist->p_root;
 295     }
 296     push_playlist_item( L, p_item );
 297     PL_UNLOCK;
 298     return 1;
 299 }
 300
 301 static int vlclua_playlist_search( lua_State *L )
 302 {
 303     playlist_t *p_playlist = vlclua_get_playlist_internal( L );
 304     const char *psz_string = luaL_optstring( L, 1, "" );
 305     PL_LOCK;
 306     playlist_LiveSearchUpdate( p_playlist, p_playlist->p_root, psz_string, true );
 307     PL_UNLOCK;
 308     push_playlist_item( L, p_playlist->p_root );
 309     return 1;
 310 }
 311
 312 static int vlclua_playlist_current( lua_State *L )
 313 {
 314     playlist_t *p_playlist = vlclua_get_playlist_internal( L );
 315     input_thread_t *p_input = playlist_CurrentInput( p_playlist );
 316     int id = -1;
 317
 318     if( p_input )
 319     {
 320         input_item_t *p_item = input_GetItem( p_input );
 321         if( p_item )
 322             id = p_item->i_id;
 323         vlc_object_release( p_input );
 324     }
 325
 326 #warning Indexing input items by ID is unsafe,
 327     lua_pushinteger( L, id );
 328     return 1;
 329 }
 330
 331 static int vlc_sort_key_from_string( const char *psz_name )
 332 {
 333     static const struct
 334     {
 335         const char *psz_name;
 336         int i_key;
 337     } pp_keys[] =
 338         { { "id", SORT_ID },
 339           { "title", SORT_TITLE },
 340           { "title nodes first", SORT_TITLE_NODES_FIRST },
 341           { "artist", SORT_ARTIST },
 342           { "genre", SORT_GENRE },
 343           { "random", SORT_RANDOM },
 344           { "duration", SORT_DURATION },
 345           { "title numeric", SORT_TITLE_NUMERIC },
 346           { "album", SORT_ALBUM },
 347           { NULL, -1 } };
 348     int i;
 349     for( i = 0; pp_keys[i].psz_name; i++ )
 350     {
 351         if( !strcmp( psz_name, pp_keys[i].psz_name ) )
 352             return pp_keys[i].i_key;
 353     }
 354     return -1;
 355 }
 356
 357 static int vlclua_playlist_sort( lua_State *L )
 358 {
 359     /* allow setting the different sort keys */
 360     int i_mode = vlc_sort_key_from_string( luaL_checkstring( L, 1 ) );
 361     if( i_mode == -1 )
 362         return luaL_error( L, "Invalid search key." );
 363     int i_type = luaL_optboolean( L, 2, 0 ) ? ORDER_REVERSE : ORDER_NORMAL;
 364     playlist_t *p_playlist = vlclua_get_playlist_internal( L );
 365     PL_LOCK;
 366     int i_ret = playlist_RecursiveNodeSort( p_playlist, p_playlist->p_playing,
 367                                             i_mode, i_type );
 368     PL_UNLOCK;
 369     return vlclua_push_ret( L, i_ret );
 370 }
 371
 372 static int vlclua_playlist_status( lua_State *L )
 373 {
 374     playlist_t *p_playlist = vlclua_get_playlist_internal( L );
 375     PL_LOCK;
 376     switch( playlist_Status( p_playlist ) )
 377     {
 378         case PLAYLIST_STOPPED:
 379             lua_pushliteral( L, "stopped" );
 380             break;
 381         case PLAYLIST_RUNNING:
 382             lua_pushliteral( L, "playing" );
 383             break;
 384         case PLAYLIST_PAUSED:
 385             lua_pushliteral( L, "paused" );
 386             break;
 387         default:
 388             lua_pushliteral( L, "unknown" );
 389             break;
 390     }
 391     PL_UNLOCK;
 392     return 1;
 393 }
 394
 395 /*****************************************************************************
 396  *
 397  *****************************************************************************/
 398 static const luaL_Reg vlclua_playlist_reg[] = {
 399     { "prev", vlclua_playlist_prev },
 400     { "next", vlclua_playlist_next },
 401     { "skip", vlclua_playlist_skip },
 402     { "play", vlclua_playlist_play },
 403     { "pause", vlclua_playlist_pause },
 404     { "stop", vlclua_playlist_stop },
 405     { "clear", vlclua_playlist_clear },
 406     { "repeat", vlclua_playlist_repeat }, // repeat is a reserved lua keyword...
 407     { "repeat_", vlclua_playlist_repeat }, // ... provide repeat_ too.
 408     { "loop", vlclua_playlist_loop },
 409     { "random", vlclua_playlist_random },
 410     { "goto", vlclua_playlist_gotoitem },
 411     { "gotoitem", vlclua_playlist_gotoitem },
 412     { "add", vlclua_playlist_add },
 413     { "enqueue", vlclua_playlist_enqueue },
 414     { "get", vlclua_playlist_get },
 415     { "search", vlclua_playlist_search },
 416     { "current", vlclua_playlist_current },
 417     { "sort", vlclua_playlist_sort },
 418     { "status", vlclua_playlist_status },
 419     { "delete", vlclua_playlist_delete },
 420     { "move", vlclua_playlist_move },
 421     { NULL, NULL }
 422 };
 423
 424 void luaopen_playlist( lua_State *L )
 425 {
 426     lua_newtable( L );
 427     luaL_register( L, NULL, vlclua_playlist_reg );
 428     lua_setfield( L, -2, "playlist" );
 429 }