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

   1 /*****************************************************************************
   2  * playlist.c
   3  *****************************************************************************
   4  * Copyright (C) 2007-2008 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 <lua.h>        /* Low level lua C API */
  41 #include <lauxlib.h>    /* Higher level C API */
  42
  43 #include "../vlc.h"
  44 #include "../libs.h"
  45 #include "playlist.h"
  46 #include "variables.h"
  47
  48 /*****************************************************************************
  49  * Internal lua<->vlc utils
  50  *****************************************************************************/
  51 playlist_t *vlclua_get_playlist_internal( lua_State *L )
  52 {
  53     vlc_object_t *p_this = vlclua_get_this( L );
  54     return pl_Hold( p_this );
  55 }
  56
  57 void vlclua_release_playlist_internal( playlist_t *p_playlist )
  58 {
  59     vlc_object_release( p_playlist );
  60 }
  61
  62 static int vlclua_playlist_prev( lua_State * L )
  63 {
  64     playlist_t *p_playlist = vlclua_get_playlist_internal( L );
  65     playlist_Prev( p_playlist );
  66     vlclua_release_playlist_internal( p_playlist );
  67     return 0;
  68 }
  69
  70 static int vlclua_playlist_next( lua_State * L )
  71 {
  72     playlist_t *p_playlist = vlclua_get_playlist_internal( L );
  73     playlist_Next( p_playlist );
  74     vlclua_release_playlist_internal( p_playlist );
  75     return 0;
  76 }
  77
  78 static int vlclua_playlist_skip( lua_State * L )
  79 {
  80     int i_skip = luaL_checkint( L, 1 );
  81     playlist_t *p_playlist = vlclua_get_playlist_internal( L );
  82     playlist_Skip( p_playlist, i_skip );
  83     vlclua_release_playlist_internal( p_playlist );
  84     return 0;
  85 }
  86
  87 static int vlclua_playlist_play( lua_State * L )
  88 {
  89     playlist_t *p_playlist = vlclua_get_playlist_internal( L );
  90     PL_LOCK;
  91     playlist_Play( p_playlist );
  92     PL_UNLOCK;
  93     vlclua_release_playlist_internal( p_playlist );
  94     return 0;
  95 }
  96
  97 static int vlclua_playlist_pause( lua_State * L )
  98 {
  99     playlist_t *p_playlist = vlclua_get_playlist_internal( L );
 100     playlist_Pause( p_playlist );
 101     vlclua_release_playlist_internal( p_playlist );
 102     return 0;
 103 }
 104
 105 static int vlclua_playlist_stop( lua_State * L )
 106 {
 107     playlist_t *p_playlist = vlclua_get_playlist_internal( L );
 108     playlist_Stop( p_playlist );
 109     vlclua_release_playlist_internal( p_playlist );
 110     return 0;
 111 }
 112
 113 static int vlclua_playlist_clear( lua_State * L )
 114 {
 115     playlist_t *p_playlist = vlclua_get_playlist_internal( L );
 116     playlist_Stop( p_playlist ); /* Isn't this already implied by Clear? */
 117     playlist_Clear( p_playlist, pl_Unlocked );
 118     vlclua_release_playlist_internal( p_playlist );
 119     return 0;
 120 }
 121
 122 static int vlclua_playlist_repeat( lua_State * L )
 123 {
 124     playlist_t *p_playlist = vlclua_get_playlist_internal( L );
 125     int i_ret = vlclua_var_toggle_or_set( L, p_playlist, "repeat" );
 126     vlclua_release_playlist_internal( p_playlist );
 127     return i_ret;
 128 }
 129
 130 static int vlclua_playlist_loop( lua_State * L )
 131 {
 132     playlist_t *p_playlist = vlclua_get_playlist_internal( L );
 133     int i_ret = vlclua_var_toggle_or_set( L, p_playlist, "loop" );
 134     vlclua_release_playlist_internal( p_playlist );
 135     return i_ret;
 136 }
 137
 138 static int vlclua_playlist_random( lua_State * L )
 139 {
 140     playlist_t *p_playlist = vlclua_get_playlist_internal( L );
 141     int i_ret = vlclua_var_toggle_or_set( L, p_playlist, "random" );
 142     vlclua_release_playlist_internal( p_playlist );
 143     return i_ret;
 144 }
 145
 146 static int vlclua_playlist_goto( lua_State * L )
 147 {
 148     int i_id = luaL_checkint( L, 1 );
 149     playlist_t *p_playlist = vlclua_get_playlist_internal( L );
 150     PL_LOCK;
 151     int i_ret = playlist_Control( p_playlist, PLAYLIST_VIEWPLAY,
 152                                   true, NULL,
 153                                   playlist_ItemGetById( p_playlist, i_id,
 154                                                         true ) );
 155     PL_UNLOCK;
 156     vlclua_release_playlist_internal( p_playlist );
 157     return vlclua_push_ret( L, i_ret );
 158 }
 159
 160 static int vlclua_playlist_add( lua_State *L )
 161 {
 162     int i_count;
 163     vlc_object_t *p_this = vlclua_get_this( L );
 164     playlist_t *p_playlist = vlclua_get_playlist_internal( L );
 165     i_count = vlclua_playlist_add_internal( p_this, L, p_playlist,
 166                                             NULL, true );
 167     vlclua_release_playlist_internal( p_playlist );
 168     lua_pushinteger( L, i_count );
 169     return 1;
 170 }
 171
 172 static int vlclua_playlist_enqueue( lua_State *L )
 173 {
 174     int i_count;
 175     vlc_object_t *p_this = vlclua_get_this( L );
 176     playlist_t *p_playlist = vlclua_get_playlist_internal( L );
 177     i_count = vlclua_playlist_add_internal( p_this, L, p_playlist,
 178                                             NULL, false );
 179     vlclua_release_playlist_internal( p_playlist );
 180     lua_pushinteger( L, i_count );
 181     return 1;
 182 }
 183
 184 static void push_playlist_item( lua_State *L, playlist_item_t *p_item );
 185 static void push_playlist_item( lua_State *L, playlist_item_t *p_item )
 186 {
 187     input_item_t *p_input = p_item->p_input;
 188     int i_flags = 0;
 189     i_flags = p_item->i_flags;
 190     lua_newtable( L );
 191     lua_pushinteger( L, p_item->i_id );
 192     lua_setfield( L, -2, "id" );
 193     lua_newtable( L );
 194 #define CHECK_AND_SET_FLAG( name, label ) \
 195     if( i_flags & PLAYLIST_ ## name ## _FLAG ) \
 196     { \
 197         lua_pushboolean( L, 1 ); \
 198         lua_setfield( L, -2, #label ); \
 199     }
 200     CHECK_AND_SET_FLAG( SAVE, save )
 201     CHECK_AND_SET_FLAG( SKIP, skip )
 202     CHECK_AND_SET_FLAG( DBL, disabled )
 203     CHECK_AND_SET_FLAG( RO, ro )
 204     CHECK_AND_SET_FLAG( REMOVE, remove )
 205     CHECK_AND_SET_FLAG( EXPANDED, expanded )
 206 #undef CHECK_AND_SET_FLAG
 207     lua_setfield( L, -2, "flags" );
 208     if( p_input )
 209     {
 210         lua_pushstring( L, p_input->psz_name );
 211         lua_setfield( L, -2, "name" );
 212         lua_pushstring( L, p_input->psz_uri );
 213         lua_setfield( L, -2, "path" );
 214         if( p_input->i_duration < 0 )
 215             lua_pushnumber( L, -1 );
 216         else
 217             lua_pushnumber( L, ((double)p_input->i_duration)*1e-6 );
 218         lua_setfield( L, -2, "duration" );
 219         lua_pushinteger( L, p_input->i_nb_played );
 220         lua_setfield( L, -2, "nb_played" );
 221         /* TODO: add (optional) info categories, meta, options, es */
 222     }
 223     if( p_item->i_children >= 0 )
 224     {
 225         int i;
 226         lua_createtable( L, p_item->i_children, 0 );
 227         for( i = 0; i < p_item->i_children; i++ )
 228         {
 229             push_playlist_item( L, p_item->pp_children[i] );
 230             lua_rawseti( L, -2, i+1 );
 231         }
 232         lua_setfield( L, -2, "children" );
 233     }
 234 }
 235
 236 static int vlclua_playlist_get( lua_State *L )
 237 {
 238     playlist_t *p_playlist = vlclua_get_playlist_internal( L );
 239     PL_LOCK;
 240     int b_category = luaL_optboolean( L, 2, 1 ); /* Default to tree playlist (discared when 1st argument is a playlist_item's id) */
 241     playlist_item_t *p_item = NULL;
 242
 243     if( lua_isnumber( L, 1 ) )
 244     {
 245         int i_id = lua_tointeger( L, 1 );
 246         p_item = playlist_ItemGetById( p_playlist, i_id, true );
 247         if( !p_item )
 248         {
 249             PL_UNLOCK;
 250             vlclua_release_playlist_internal( p_playlist );
 251             return 0; /* Should we return an error instead? */
 252         }
 253     }
 254     else if( lua_isstring( L, 1 ) )
 255     {
 256         const char *psz_what = lua_tostring( L, 1 );
 257         if( !strcasecmp( psz_what, "normal" )
 258          || !strcasecmp( psz_what, "playlist" ) )
 259             p_item = b_category ? p_playlist->p_local_category
 260                                 : p_playlist->p_local_onelevel;
 261         else if( !strcasecmp( psz_what, "ml" )
 262               || !strcasecmp( psz_what, "media library" ) )
 263             p_item = b_category ? p_playlist->p_ml_category
 264                                 : p_playlist->p_ml_onelevel;
 265         else if( !strcasecmp( psz_what, "root" ) )
 266             p_item = b_category ? p_playlist->p_root_category
 267                                 : p_playlist->p_root_onelevel;
 268         else
 269         {
 270             int i;
 271 #ifdef FIX_THAT_CODE_NOT_TO_MESS_WITH_PLAYLIST_INTERNALS
 272             for( i = 0; i < p_playlist->i_sds; i++ )
 273             {
 274                 if( !strcasecmp( psz_what,
 275                                  p_playlist->pp_sds[i]->p_sd->psz_module ) )
 276                 {
 277                     p_item = b_category ? p_playlist->pp_sds[i]->p_cat
 278                                         : p_playlist->pp_sds[i]->p_one;
 279                     break;
 280                 }
 281             }
 282 #else
 283 # warning "Don't access playlist iternal, broken code here."
 284             abort();
 285 #endif
 286             if( !p_item )
 287             {
 288                 PL_UNLOCK;
 289                 vlclua_release_playlist_internal( p_playlist );
 290                 return 0; /* Should we return an error instead? */
 291             }
 292         }
 293     }
 294     else
 295     {
 296         p_item = b_category ? p_playlist->p_root_category
 297                             : p_playlist->p_root_onelevel;
 298     }
 299     push_playlist_item( L, p_item );
 300     PL_UNLOCK;
 301     vlclua_release_playlist_internal( p_playlist );
 302     return 1;
 303 }
 304
 305 static int vlclua_playlist_search( lua_State *L )
 306 {
 307     playlist_t *p_playlist = vlclua_get_playlist_internal( L );
 308     const char *psz_string = luaL_optstring( L, 1, "" );
 309     int b_category = luaL_optboolean( L, 2, 1 ); /* default to category */
 310     playlist_item_t *p_item = b_category ? p_playlist->p_root_category
 311                                          : p_playlist->p_root_onelevel;
 312     PL_LOCK;
 313     playlist_LiveSearchUpdate( p_playlist, p_item, psz_string );
 314     PL_UNLOCK;
 315     push_playlist_item( L, p_item );
 316     vlclua_release_playlist_internal( p_playlist );
 317     return 1;
 318 }
 319
 320 static int vlclua_playlist_current( lua_State *L )
 321 {
 322     playlist_t *p_playlist = vlclua_get_playlist_internal( L );
 323     lua_pushinteger( L, var_GetInteger( p_playlist, "playlist-current" ) );
 324     vlclua_release_playlist_internal( p_playlist );
 325     return 1;
 326 }
 327
 328 static int vlc_sort_key_from_string( const char *psz_name )
 329 {
 330     static const struct
 331     {
 332         const char *psz_name;
 333         int i_key;
 334     } pp_keys[] =
 335         { { "id", SORT_ID },
 336           { "title", SORT_TITLE },
 337           { "title nodes first", SORT_TITLE_NODES_FIRST },
 338           { "artist", SORT_ARTIST },
 339           { "genre", SORT_GENRE },
 340           { "random", SORT_RANDOM },
 341           { "duration", SORT_DURATION },
 342           { "title numeric", SORT_TITLE_NUMERIC },
 343           { "album", SORT_ALBUM },
 344           { NULL, -1 } };
 345     int i;
 346     for( i = 0; pp_keys[i].psz_name; i++ )
 347     {
 348         if( !strcmp( psz_name, pp_keys[i].psz_name ) )
 349             return pp_keys[i].i_key;
 350     }
 351     return -1;
 352 }
 353
 354 static int vlclua_playlist_sort( lua_State *L )
 355 {
 356     /* allow setting the different sort keys */
 357     int i_mode = vlc_sort_key_from_string( luaL_checkstring( L, 1 ) );
 358     if( i_mode == -1 )
 359         return luaL_error( L, "Invalid search key." );
 360     int i_type = luaL_optboolean( L, 2, 0 ) ? ORDER_REVERSE : ORDER_NORMAL;
 361     int b_category = luaL_optboolean( L, 3, 1 ); /* default to category */
 362     playlist_t *p_playlist = vlclua_get_playlist_internal( L );
 363     PL_LOCK;
 364     playlist_item_t *p_root = b_category ? p_playlist->p_local_category
 365                                          : p_playlist->p_local_onelevel;
 366     int i_ret = playlist_RecursiveNodeSort( p_playlist, p_root, i_mode,
 367                                             i_type );
 368     PL_UNLOCK;
 369     vlclua_release_playlist_internal( p_playlist );
 370     return vlclua_push_ret( L, i_ret );
 371 }
 372
 373 /* FIXME: split this in 3 different functions? */
 374 static int vlclua_playlist_status( lua_State *L )
 375 {
 376     playlist_t *p_playlist = vlclua_get_playlist_internal( L );
 377     /*
 378     int i_count = 0;
 379     lua_settop( L, 0 );*/
 380     input_thread_t * p_input = playlist_CurrentInput( p_playlist );
 381     if( p_input )
 382     {
 383         /*char *psz_uri =
 384             input_item_GetURI( input_GetItem( p_playlist->p_input ) );
 385         lua_pushstring( L, psz_uri );
 386         free( psz_uri );
 387         lua_pushnumber( L, config_GetInt( p_intf, "volume" ) );*/
 388         PL_LOCK;
 389         switch( playlist_Status( p_playlist ) )
 390         {
 391             case PLAYLIST_STOPPED:
 392                 lua_pushstring( L, "stopped" );
 393                 break;
 394             case PLAYLIST_RUNNING:
 395                 lua_pushstring( L, "playing" );
 396                 break;
 397             case PLAYLIST_PAUSED:
 398                 lua_pushstring( L, "paused" );
 399                 break;
 400             default:
 401                 lua_pushstring( L, "unknown" );
 402                 break;
 403         }
 404         PL_UNLOCK;
 405         /*i_count += 3;*/
 406         vlc_object_release( p_input );
 407     }
 408     else
 409     {
 410         lua_pushstring( L, "stopped" );
 411     }
 412     vlclua_release_playlist_internal( p_playlist );
 413     return 1;
 414 }
 415
 416 /*****************************************************************************
 417  *
 418  *****************************************************************************/
 419 static const luaL_Reg vlclua_playlist_reg[] = {
 420     { "prev", vlclua_playlist_prev },
 421     { "next", vlclua_playlist_next },
 422     { "skip", vlclua_playlist_skip },
 423     { "play", vlclua_playlist_play },
 424     { "pause", vlclua_playlist_pause },
 425     { "stop", vlclua_playlist_stop },
 426     { "clear", vlclua_playlist_clear },
 427     { "repeat", vlclua_playlist_repeat },
 428     { "loop", vlclua_playlist_loop },
 429     { "random", vlclua_playlist_random },
 430     { "goto", vlclua_playlist_goto },
 431     { "add", vlclua_playlist_add },
 432     { "enqueue", vlclua_playlist_enqueue },
 433     { "get", vlclua_playlist_get },
 434     { "search", vlclua_playlist_search },
 435     { "current", vlclua_playlist_current },
 436     { "sort", vlclua_playlist_sort },
 437     { "status", vlclua_playlist_status },
 438     { NULL, NULL }
 439 };
 440
 441 void luaopen_playlist( lua_State *L )
 442 {
 443     lua_newtable( L );
 444     luaL_register( L, NULL, vlclua_playlist_reg );
 445     lua_setfield( L, -2, "playlist" );
 446 }