engine.c 17.2 KB
Newer Older
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45
/*****************************************************************************
 * engine.c : Run the playlist and handle its control
 *****************************************************************************
 * Copyright (C) 1999-2004 the VideoLAN team
 * $Id: /local/vlc/0.8.6-playlist-vlm/src/playlist/playlist.c 13741 2006-03-21T19:29:39.792444Z zorglub  $
 *
 * Authors: Samuel Hocevar <sam@zoy.org>
 *          Clément Stenac <zorglub@videolan.org>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
 *****************************************************************************/
#include <vlc/vlc.h>
#include <vlc/vout.h>
#include <vlc/sout.h>
#include <vlc/input.h>
#include "vlc_playlist.h"
#include "vlc_interaction.h"

/*****************************************************************************
 * Local prototypes
 *****************************************************************************/
static void VariablesInit( playlist_t *p_playlist );

/**
 * Create playlist
 *
 * Create a playlist structure.
 * \param p_parent the vlc object that is to be the parent of this playlist
 * \return a pointer to the created playlist, or NULL on error
 */
playlist_t * playlist_Create( vlc_object_t *p_parent )
{
    playlist_t *p_playlist;
46
    int i_tree;
47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63

    /* Allocate structure */
    p_playlist = vlc_object_create( p_parent, VLC_OBJECT_PLAYLIST );
    if( !p_playlist )
    {
        msg_Err( p_parent, "out of memory" );
        return NULL;
    }

    VariablesInit( p_playlist );

    /* Initialise data structures */
    vlc_mutex_init( p_playlist, &p_playlist->gc_lock );
    p_playlist->i_last_playlist_id = 0;
    p_playlist->i_last_input_id = 0;
    p_playlist->p_input = NULL;

64 65 66
    p_playlist->i_vout_destroyed_date = 0;
    p_playlist->i_sout_destroyed_date = 0;

67 68 69 70 71 72 73 74
    p_playlist->i_size = 0;
    p_playlist->pp_items = NULL;
    p_playlist->i_all_size = 0;
    p_playlist->pp_all_items = NULL;

    p_playlist->i_input_items = 0;
    p_playlist->pp_input_items = NULL;

75 76 77 78
    i_tree = var_CreateGetBool( p_playlist, "playlist-tree" );
    p_playlist->b_always_tree = (i_tree == 1);
    p_playlist->b_never_tree = (i_tree == 2);

79 80 81 82 83 84 85 86
    p_playlist->p_root_category = playlist_NodeCreate( p_playlist, NULL, NULL);
    p_playlist->p_root_onelevel = playlist_NodeCreate( p_playlist, NULL, NULL);

    /* Create playlist and media library */
    p_playlist->p_local_category = playlist_NodeCreate( p_playlist,
                                 _( "Playlist" ),p_playlist->p_root_category );
    p_playlist->p_local_onelevel =  playlist_NodeCreate( p_playlist,
                                _( "Playlist" ), p_playlist->p_root_onelevel );
87 88 89
    p_playlist->p_local_category->i_flags |= PLAYLIST_RO_FLAG;
    p_playlist->p_local_onelevel->i_flags |= PLAYLIST_RO_FLAG;

90
    /* Link the nodes together. Todo: actually create them from the same input*/
91 92
    p_playlist->p_local_onelevel->p_input->i_id =
        p_playlist->p_local_category->p_input->i_id;
93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108

    if( config_GetInt( p_playlist, "media-library") )
    {
        p_playlist->p_ml_category =   playlist_NodeCreate( p_playlist,
                           _( "Media Library" ), p_playlist->p_root_category );
        p_playlist->p_ml_onelevel =  playlist_NodeCreate( p_playlist,
                           _( "Media Library" ), p_playlist->p_root_onelevel );
        p_playlist->p_ml_category->i_flags |= PLAYLIST_RO_FLAG;
        p_playlist->p_ml_onelevel->i_flags |= PLAYLIST_RO_FLAG;
        p_playlist->p_ml_onelevel->p_input->i_id =
             p_playlist->p_ml_category->p_input->i_id;
    }
    else
    {
        p_playlist->p_ml_category = p_playlist->p_ml_onelevel = NULL;
    }
109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145

    /* Initial status */
    p_playlist->status.p_item = NULL;
    p_playlist->status.p_node = p_playlist->p_root_onelevel;
    p_playlist->request.b_request = VLC_FALSE;
    p_playlist->status.i_status = PLAYLIST_STOPPED;

    p_playlist->i_sort = SORT_ID;
    p_playlist->i_order = ORDER_NORMAL;

    vlc_object_attach( p_playlist, p_parent );
    return p_playlist;
}

void playlist_Destroy( playlist_t *p_playlist )
{
    while( p_playlist->i_sds )
    {
        playlist_ServicesDiscoveryRemove( p_playlist,
                                          p_playlist->pp_sds[0]->psz_module );
    }
    vlc_thread_join( p_playlist->p_preparse );
    vlc_thread_join( p_playlist );

    vlc_object_detach( p_playlist->p_preparse );

    var_Destroy( p_playlist, "intf-change" );
    var_Destroy( p_playlist, "item-change" );
    var_Destroy( p_playlist, "playlist-current" );
    var_Destroy( p_playlist, "intf-popmenu" );
    var_Destroy( p_playlist, "intf-show" );
    var_Destroy( p_playlist, "play-and-stop" );
    var_Destroy( p_playlist, "random" );
    var_Destroy( p_playlist, "repeat" );
    var_Destroy( p_playlist, "loop" );
    var_Destroy( p_playlist, "activity" );

146 147 148 149 150 151
    PL_LOCK;
    playlist_NodeDelete( p_playlist, p_playlist->p_root_category, VLC_TRUE,
                         VLC_TRUE );
    playlist_NodeDelete( p_playlist, p_playlist->p_root_onelevel, VLC_TRUE,
                         VLC_TRUE );
    PL_UNLOCK;
152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215

    if( p_playlist->p_stats )
        free( p_playlist->p_stats );

    vlc_mutex_destroy( &p_playlist->gc_lock );
    vlc_object_destroy( p_playlist->p_preparse );
    vlc_object_destroy( p_playlist );

}
/* Destroy remaining objects */
static mtime_t ObjectGarbageCollector( playlist_t *p_playlist, int i_type,
                                       mtime_t destroy_date )
{
    vlc_object_t *p_obj;

    if( destroy_date > mdate() ) return destroy_date;

    if( destroy_date == 0 )
    {
        /* give a little time */
        return mdate() + I64C(1000000);
    }
    else
    {
        vlc_mutex_lock( &p_playlist->gc_lock );
        while( ( p_obj = vlc_object_find( p_playlist, i_type, FIND_CHILD ) ) )
        {
            if( p_obj->p_parent != (vlc_object_t*)p_playlist )
            {
                /* only first child (ie unused) */
                vlc_object_release( p_obj );
                break;
            }
            if( i_type == VLC_OBJECT_VOUT )
            {
                msg_Dbg( p_playlist, "garbage collector destroying 1 vout" );
                vlc_object_detach( p_obj );
                vlc_object_release( p_obj );
                vout_Destroy( (vout_thread_t *)p_obj );
            }
            else if( i_type == VLC_OBJECT_SOUT )
            {
                vlc_object_release( p_obj );
                sout_DeleteInstance( (sout_instance_t*)p_obj );
            }
        }
        vlc_mutex_unlock( &p_playlist->gc_lock );
        return 0;
    }
}

/** Main loop for the playlist */
void playlist_MainLoop( playlist_t *p_playlist )
{
    playlist_item_t *p_item = NULL;


    PL_LOCK

    /* First, check if we have something to do */
    /* FIXME : this can be called several times */
    if( p_playlist->request.b_request )
    {
        /* Stop the existing input */
216
        if( p_playlist->p_input && !p_playlist->p_input->b_die )
217
        {
218
            PL_DEBUG( "incoming request - stopping current input" );
219 220 221 222 223 224 225 226 227 228 229 230
            input_StopThread( p_playlist->p_input );
        }
    }

    /* If there is an input, check that it doesn't need to die. */
    if( p_playlist->p_input )
    {
        /* This input is dead. Remove it ! */
        if( p_playlist->p_input->b_dead )
        {
            int i_activity;
            input_thread_t *p_input;
231
            PL_DEBUG( "dead input" );
232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249

            p_input = p_playlist->p_input;
            p_playlist->p_input = NULL;

            /* Release the playlist lock, because we may get stuck
             * in input_DestroyThread() for some time. */
            PL_UNLOCK

            /* Destroy input */
            input_DestroyThread( p_input );

            /* Unlink current input
             * (_after_ input_DestroyThread for vout garbage collector) */
            vlc_object_detach( p_input );

            /* Destroy object */
            vlc_object_destroy( p_input );

250 251
            p_playlist->i_vout_destroyed_date = 0;
            p_playlist->i_sout_destroyed_date = 0;
252 253 254 255

            if( p_playlist->status.p_item->i_flags
                & PLAYLIST_REMOVE_FLAG )
            {
256 257
                 PL_DEBUG( "%s was marked for deletion, deleting",
                                 PLI_NAME( p_playlist->status.p_item  ) );
258
                 playlist_ItemDelete( p_playlist->status.p_item );
259 260
                 if( p_playlist->request.p_item == p_playlist->status.p_item )
                     p_playlist->request.p_item = NULL;
261 262 263 264 265 266 267 268 269 270 271 272
                 p_playlist->status.p_item = NULL;
            }

            i_activity= var_GetInteger( p_playlist, "activity") ;
            var_SetInteger( p_playlist, "activity", i_activity -
                            DEFAULT_INPUT_ACTIVITY );

            return;
        }
        /* This input is dying, let it do */
        else if( p_playlist->p_input->b_die )
        {
273
            PL_DEBUG( "dying input" );
274 275 276 277 278
        }
        /* This input has finished, ask it to die ! */
        else if( p_playlist->p_input->b_error
                  || p_playlist->p_input->b_eof )
        {
279
            PL_DEBUG( "finished input" );
280 281 282 283 284 285 286
            input_StopThread( p_playlist->p_input );
            /* Select the next playlist item */
            PL_UNLOCK
            return;
        }
        else if( p_playlist->p_input->i_state != INIT_S )
        {
287
            PL_UNLOCK;
288
            p_playlist->i_vout_destroyed_date =
289
                ObjectGarbageCollector( p_playlist, VLC_OBJECT_VOUT,
290 291
                                        p_playlist->i_vout_destroyed_date );
            p_playlist->i_sout_destroyed_date =
292
                ObjectGarbageCollector( p_playlist, VLC_OBJECT_SOUT,
293
                                        p_playlist->i_sout_destroyed_date );
294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309
            PL_LOCK
        }
    }
    else
    {
        /* No input. Several cases
         *  - No request, running status -> start new item
         *  - No request, stopped status -> collect garbage
         *  - Request, running requested -> start new item
         *  - Request, stopped requested -> collect garbage
         */
         if( (!p_playlist->request.b_request &&
              p_playlist->status.i_status != PLAYLIST_STOPPED) ||
              ( p_playlist->request.b_request &&
                p_playlist->request.i_status != PLAYLIST_STOPPED ) )
         {
310
             msg_Dbg( p_playlist, "starting new item" );
311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326
             stats_TimerStart( p_playlist, "Playlist walk",
                                  STATS_TIMER_PLAYLIST_WALK );
             p_item = playlist_NextItem( p_playlist );
             stats_TimerStop( p_playlist, STATS_TIMER_PLAYLIST_WALK );

             if( p_item == NULL )
             {
                msg_Dbg( p_playlist, "nothing to play" );
                p_playlist->status.i_status = PLAYLIST_STOPPED;
                PL_UNLOCK
                return;
             }
             playlist_PlayItem( p_playlist, p_item );
         }
         else
         {
327
             if( p_playlist->status.p_item &&
328 329
                 p_playlist->status.p_item->i_flags & PLAYLIST_REMOVE_FLAG )
             {
330 331
                 PL_DEBUG( "deleting item marked for deletion" );
                 playlist_ItemDelete( p_playlist->status.p_item );
332 333 334 335 336
                 p_playlist->status.p_item = NULL;
             }

             /* Collect garbage */
             PL_UNLOCK
337
             p_playlist->i_sout_destroyed_date =
338
             ObjectGarbageCollector( p_playlist, VLC_OBJECT_SOUT, mdate() );
339
             p_playlist->i_vout_destroyed_date =
340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467
             ObjectGarbageCollector( p_playlist, VLC_OBJECT_VOUT, mdate() );
             PL_LOCK
         }
    }
    PL_UNLOCK
}

/** Playlist dying last loop */
void playlist_LastLoop( playlist_t *p_playlist )
{
    vlc_object_t *p_obj;

    /* If there is an input, kill it */
    while( 1 )
    {
        PL_LOCK

        if( p_playlist->p_input == NULL )
        {
            PL_UNLOCK
            break;
        }

        if( p_playlist->p_input->b_dead )
        {
            input_thread_t *p_input;

            /* Unlink current input */
            p_input = p_playlist->p_input;
            p_playlist->p_input = NULL;
            PL_UNLOCK

            /* Destroy input */
            input_DestroyThread( p_input );
            /* Unlink current input (_after_ input_DestroyThread for vout
             * garbage collector)*/
            vlc_object_detach( p_input );

            /* Destroy object */
            vlc_object_destroy( p_input );
            continue;
        }
        else if( p_playlist->p_input->b_die )
        {
            /* This input is dying, leave it alone */
            ;
        }
        else if( p_playlist->p_input->b_error || p_playlist->p_input->b_eof )
        {
            input_StopThread( p_playlist->p_input );
            PL_UNLOCK
            continue;
        }
        else
        {
            p_playlist->p_input->b_eof = 1;
        }

        PL_UNLOCK

        msleep( INTF_IDLE_SLEEP );
    }

    /* close all remaining sout */
    while( ( p_obj = vlc_object_find( p_playlist,
                                      VLC_OBJECT_SOUT, FIND_CHILD ) ) )
    {
        vlc_object_release( p_obj );
        sout_DeleteInstance( (sout_instance_t*)p_obj );
    }

    /* close all remaining vout */
    while( ( p_obj = vlc_object_find( p_playlist,
                                      VLC_OBJECT_VOUT, FIND_CHILD ) ) )
    {
        vlc_object_detach( p_obj );
        vlc_object_release( p_obj );
        vout_Destroy( (vout_thread_t *)p_obj );
    }
}

/** Main loop for preparser queue */
void playlist_PreparseLoop( playlist_preparse_t *p_obj )
{
    playlist_t *p_playlist = (playlist_t *)p_obj->p_parent;
    int i_activity;

    vlc_mutex_lock( &p_obj->object_lock );

    if( p_obj->i_waiting > 0 )
    {
        input_item_t *p_current = p_playlist->p_preparse->pp_waiting[0];
        REMOVE_ELEM( p_obj->pp_waiting, p_obj->i_waiting, 0 );
        vlc_mutex_unlock( &p_obj->object_lock );
        vlc_mutex_lock( &p_playlist->object_lock );
        if( p_current )
        {
            vlc_bool_t b_preparsed = VLC_FALSE;
            if( strncmp( p_current->psz_uri, "http:", 5 ) &&
                strncmp( p_current->psz_uri, "rtsp:", 5 ) &&
                strncmp( p_current->psz_uri, "udp:", 4 ) &&
                strncmp( p_current->psz_uri, "mms:", 4 ) &&
                strncmp( p_current->psz_uri, "cdda:", 4 ) &&
                strncmp( p_current->psz_uri, "dvd:", 4 ) &&
                strncmp( p_current->psz_uri, "v4l:", 4 ) &&
                strncmp( p_current->psz_uri, "dshow:", 6 ) )
            {
                b_preparsed = VLC_TRUE;
                stats_TimerStart( p_playlist, "Preparse run",
                                  STATS_TIMER_PREPARSE );
                input_Preparse( p_playlist, p_current );
                stats_TimerStop( p_playlist, STATS_TIMER_PREPARSE );
            }
            vlc_mutex_unlock( &p_playlist->object_lock );
            if( b_preparsed )
            {
                var_SetInteger( p_playlist, "item-change",
                                p_current->i_id );
            }
            vlc_gc_decref( p_current );
        }
        else
        {
            vlc_mutex_unlock( &p_playlist->object_lock );
        }
        vlc_mutex_lock( &p_obj->object_lock );
        i_activity=  var_GetInteger( p_playlist, "activity" );
        if( i_activity < 0 ) i_activity = 0;
468
        vlc_mutex_unlock( &p_obj->object_lock );
469
        msleep( (i_activity+1) * 1000 );
470
        return;
471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511
    }
    vlc_mutex_unlock( &p_obj->object_lock );
}

static void VariablesInit( playlist_t *p_playlist )
{
    vlc_value_t val;
    /* These variables control updates */
    var_Create( p_playlist, "intf-change", VLC_VAR_BOOL );
    val.b_bool = VLC_TRUE;
    var_Set( p_playlist, "intf-change", val );

    var_Create( p_playlist, "item-change", VLC_VAR_INTEGER );
    val.i_int = -1;
    var_Set( p_playlist, "item-change", val );

    var_Create( p_playlist, "item-deleted", VLC_VAR_INTEGER );
    val.i_int = -1;
    var_Set( p_playlist, "item-deleted", val );

    var_Create( p_playlist, "item-append", VLC_VAR_ADDRESS );

    var_Create( p_playlist, "playlist-current", VLC_VAR_INTEGER );
    val.i_int = -1;
    var_Set( p_playlist, "playlist-current", val );

    var_Create( p_playlist, "intf-popupmenu", VLC_VAR_BOOL );

    var_Create( p_playlist, "intf-show", VLC_VAR_BOOL );
    val.b_bool = VLC_TRUE;
    var_Set( p_playlist, "intf-show", val );

    var_Create( p_playlist, "activity", VLC_VAR_INTEGER );
    var_SetInteger( p_playlist, "activity", 0 );

    /* Variables to control playback */
    var_CreateGetBool( p_playlist, "play-and-stop" );
    var_CreateGetBool( p_playlist, "random" );
    var_CreateGetBool( p_playlist, "repeat" );
    var_CreateGetBool( p_playlist, "loop" );
}