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hierarchical_media_list_view.c
资源名称：vlc-1.0.5.zip　[点击查看]
上传用户：kjfoods
上传日期：2020-07-06
资源大小：29949k
文件大小：8k
源码类别：

midi

开发平台：

Unix_Linux

hierarchical_media_list_view.c：源码内容
  1. /*****************************************************************************
  2.  * hierarchical_media_list_view.c: libvlc hierarchical media list view functs.
  3.  *****************************************************************************
  4.  * Copyright (C) 2007 the VideoLAN team
  5.  * $Id: ee89ba8e5514138dcb6d91c14d3803240457ea95 $
  6.  *
  7.  * Authors: Pierre d'Herbemont <pdherbemont # videolan.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.  *****************************************************************************/
  24. #include <vlc/libvlc.h>
  25. #include <vlc/libvlc_media.h>
  26. #include <vlc/libvlc_media_list.h>
  27. #include <vlc/libvlc_media_list_view.h>
  29. #include "media_list_internal.h"
  30. #include "media_list_view_internal.h"
  32. //#define DEBUG_HIERARCHICAL_VIEW
  34. #ifdef DEBUG_HIERARCHICAL_VIEW
  35. # define trace( fmt, ... ) printf( "%s(): " fmt, __FUNCTION__, ##__VA_ARGS__ )
  36. #else
  37. # define trace( ... )
  38. #endif
  40. /*
  41.  * Private functions
  42.  */
  44. /**************************************************************************
  45.  *       flat_media_list_view_count  (private)
  46.  * (called by media_list_view_count)
  47.  **************************************************************************/
  48. static int
  49. hierarch_media_list_view_count( libvlc_media_list_view_t * p_mlv,
  50.                                 libvlc_exception_t * p_e )
  51. {
  52.     return libvlc_media_list_count( p_mlv->p_mlist, p_e );
  53. }
  55. /**************************************************************************
  56.  *       flat_media_list_view_item_at_index  (private)
  57.  * (called by flat_media_list_view_item_at_index)
  58.  **************************************************************************/
  59. static libvlc_media_t *
  60. hierarch_media_list_view_item_at_index( libvlc_media_list_view_t * p_mlv,
  61.                                     int index,
  62.                                     libvlc_exception_t * p_e )
  63. {
  64.     return libvlc_media_list_item_at_index( p_mlv->p_mlist, index, p_e );
  65. }
  67. /**************************************************************************
  68.  *       flat_media_list_view_item_at_index  (private)
  69.  * (called by flat_media_list_view_item_at_index)
  70.  **************************************************************************/
  71. static libvlc_media_list_view_t *
  72. hierarch_media_list_view_children_at_index( libvlc_media_list_view_t * p_mlv,
  73.                                         int index,
  74.                                         libvlc_exception_t * p_e )
  75. {
  76.     libvlc_media_t * p_md;
  77.     libvlc_media_list_t * p_submlist;
  78.     libvlc_media_list_view_t * p_ret;
  79.     p_md = libvlc_media_list_item_at_index( p_mlv->p_mlist, index, p_e );
  80.     if( !p_md ) return NULL;
  81.     p_submlist = libvlc_media_subitems( p_md, p_e );
  82.     libvlc_media_release( p_md );
  83.     if( !p_submlist ) return NULL;
  84.     p_ret = libvlc_media_list_hierarchical_view( p_submlist, p_e );
  85.     libvlc_media_list_release( p_submlist );
  87.     return p_ret;
  88. }
  90. /**************************************************************************
  91.  *       media_list_(item|will)_* (private) (Event callback)
  92.  **************************************************************************/
  93. static void
  94. media_list_item_added( const libvlc_event_t * p_event, void * user_data )
  95. {
  96.     libvlc_media_t * p_md;
  97.     libvlc_media_list_view_t * p_mlv = user_data;
  98.     int index = p_event->u.media_list_item_added.index;
  99.     p_md = p_event->u.media_list_item_added.item;
  100.     libvlc_media_list_view_item_added( p_mlv, p_md, index );
  101. }
  102. static void
  103. media_list_will_add_item( const libvlc_event_t * p_event, void * user_data )
  104. {
  105.     libvlc_media_t * p_md;
  106.     libvlc_media_list_view_t * p_mlv = user_data;
  107.     int index = p_event->u.media_list_will_add_item.index;
  108.     p_md = p_event->u.media_list_will_add_item.item;
  109.     libvlc_media_list_view_will_add_item( p_mlv, p_md, index );
  110. }
  111. static void
  112. media_list_item_deleted( const libvlc_event_t * p_event, void * user_data )
  113. {
  114.     libvlc_media_t * p_md;
  115.     libvlc_media_list_view_t * p_mlv = user_data;
  116.     int index = p_event->u.media_list_item_deleted.index;
  117.     p_md = p_event->u.media_list_item_deleted.item;
  118.     libvlc_media_list_view_item_deleted( p_mlv, p_md, index );
  119. }
  120. static void
  121. media_list_will_delete_item( const libvlc_event_t * p_event, void * user_data )
  122. {
  123.     libvlc_media_t * p_md;
  124.     libvlc_media_list_view_t * p_mlv = user_data;
  125.     int index = p_event->u.media_list_will_delete_item.index;
  126.     p_md = p_event->u.media_list_will_delete_item.item;
  127.     libvlc_media_list_view_will_delete_item( p_mlv, p_md, index );
  128. }
  130. /*
  131.  * Public libvlc functions
  132.  */
  135. /**************************************************************************
  136.  *       flat_media_list_view_release (private)
  137.  * (called by media_list_view_release)
  138.  **************************************************************************/
  139. static void
  140. hierarch_media_list_view_release( libvlc_media_list_view_t * p_mlv )
  141. {
  142.     libvlc_event_detach( p_mlv->p_mlist->p_event_manager,
  143.                          libvlc_MediaListItemAdded,
  144.                          media_list_item_added, p_mlv, NULL );
  145.     libvlc_event_detach( p_mlv->p_mlist->p_event_manager,
  146.                          libvlc_MediaListWillAddItem,
  147.                          media_list_will_add_item, p_mlv, NULL );
  148.     libvlc_event_detach( p_mlv->p_mlist->p_event_manager,
  149.                          libvlc_MediaListItemDeleted,
  150.                          media_list_item_deleted, p_mlv, NULL );
  151.     libvlc_event_detach( p_mlv->p_mlist->p_event_manager,
  152.                          libvlc_MediaListWillDeleteItem,
  153.                          media_list_will_delete_item, p_mlv, NULL );
  154. }
  156. /**************************************************************************
  157.  *       libvlc_media_list_flat_view (Public)
  158.  **************************************************************************/
  159. libvlc_media_list_view_t *
  160. libvlc_media_list_hierarchical_view( libvlc_media_list_t * p_mlist,
  161.                                      libvlc_exception_t * p_e )
  162. {
  163.     trace("n");
  164.     libvlc_media_list_view_t * p_mlv;
  165.     p_mlv = libvlc_media_list_view_new( p_mlist,
  166.                                         hierarch_media_list_view_count,
  167.                                         hierarch_media_list_view_item_at_index,
  168.                                         hierarch_media_list_view_children_at_index,
  169.                                         libvlc_media_list_hierarchical_view,
  170.                                         hierarch_media_list_view_release,
  171.                                         NULL,
  172.                                         p_e );
  173.     libvlc_media_list_lock( p_mlist );
  174.     libvlc_event_attach( p_mlv->p_mlist->p_event_manager,
  175.                          libvlc_MediaListItemAdded,
  176.                          media_list_item_added, p_mlv, NULL );
  177.     libvlc_event_attach( p_mlv->p_mlist->p_event_manager,
  178.                          libvlc_MediaListWillAddItem,
  179.                          media_list_will_add_item, p_mlv, NULL );
  180.     libvlc_event_attach( p_mlv->p_mlist->p_event_manager,
  181.                          libvlc_MediaListItemDeleted,
  182.                          media_list_item_deleted, p_mlv, NULL );
  183.     libvlc_event_attach( p_mlv->p_mlist->p_event_manager,
  184.                          libvlc_MediaListWillDeleteItem,
  185.                          media_list_will_delete_item, p_mlv, NULL );
  186.     libvlc_media_list_unlock( p_mlist );
  187.     return p_mlv;
  188. }