sort.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:9k
源码类别:
midi
开发平台:
Unix_Linux
- /*****************************************************************************
- * sort.c : Playlist sorting functions
- *****************************************************************************
- * Copyright (C) 1999-2007 the VideoLAN team
- * $Id: dd477fbdf3a5ff6f0d077565fe335e12ad67db3e $
- *
- * Authors: Clément Stenac <zorglub@videolan.org>
- * Ilkka Ollakka <ileoo@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.
- *****************************************************************************/
- #ifdef HAVE_CONFIG_H
- # include "config.h"
- #endif
- #include <vlc_common.h>
- #include "vlc_playlist.h"
- #include "playlist_internal.h"
- static int playlist_ItemArraySort( playlist_t *p_playlist, int i_items,
- playlist_item_t **pp_items, int i_mode,
- int i_type );
- static int playlist_cmp(const void *, const void *);
- /**
- * Sort a node.
- * This function must be entered with the playlist lock !
- *
- * param p_playlist the playlist
- * param p_node the node to sort
- * param i_mode: SORT_ID, SORT_TITLE, SORT_ARTIST, SORT_ALBUM, SORT_RANDOM
- * param i_type: ORDER_NORMAL or ORDER_REVERSE (reversed order)
- * return VLC_SUCCESS on success
- */
- static int playlist_NodeSort( playlist_t * p_playlist , playlist_item_t *p_node,
- int i_mode, int i_type )
- {
- playlist_ItemArraySort( p_playlist,p_node->i_children,
- p_node->pp_children, i_mode, i_type );
- return VLC_SUCCESS;
- }
- /**
- * Sort a node recursively
- * param p_playlist the playlist
- * param p_node the node to sort
- * param i_mode: SORT_ID, SORT_TITLE, SORT_ARTIST, SORT_ALBUM, SORT_RANDOM
- * param i_type: ORDER_NORMAL or ORDER_REVERSE (reversed order)
- * return VLC_SUCCESS on success
- */
- static int recursiveNodeSort( playlist_t *p_playlist, playlist_item_t *p_node,
- int i_mode, int i_type )
- {
- int i;
- /* Sort the current node */
- playlist_NodeSort( p_playlist, p_node, i_mode, i_type );
- /* And all the children */
- for( i = 0 ; i< p_node->i_children; i++ )
- {
- if( p_node->pp_children[i]->i_children != -1 )
- {
- recursiveNodeSort( p_playlist, p_node->pp_children[i],
- i_mode, i_type );
- }
- }
- return VLC_SUCCESS;
- }
- /**
- * Sort a node recursively.
- *
- * This function must be entered with the playlist lock !
- *
- * param p_playlist the playlist
- * param p_node the node to sort
- * param i_mode: SORT_ID, SORT_TITLE, SORT_ARTIST, SORT_ALBUM, SORT_RANDOM
- * param i_type: ORDER_NORMAL or ORDER_REVERSE (reversed order)
- * return VLC_SUCCESS on success
- */
- int playlist_RecursiveNodeSort( playlist_t *p_playlist, playlist_item_t *p_node,
- int i_mode, int i_type )
- {
- /* Ask the playlist to reset as we are changing the order */
- pl_priv(p_playlist)->b_reset_currently_playing = true;
- /* Do the real job recursively */
- return recursiveNodeSort( p_playlist, p_node, i_mode, i_type );
- }
- static int sort_mode = 0;
- static int sort_type = 0;
- static vlc_mutex_t sort_lock = VLC_STATIC_MUTEX;
- static int playlist_ItemArraySort( playlist_t *p_playlist, int i_items,
- playlist_item_t **pp_items, int i_mode,
- int i_type )
- {
- int i_position;
- playlist_item_t *p_temp;
- (void)p_playlist; // a bit surprising we don't need p_playlist!
- if( i_mode == SORT_RANDOM )
- {
- for( i_position = 0; i_position < i_items ; i_position ++ )
- {
- int i_new;
- if( i_items > 1 )
- i_new = rand() % (i_items - 1);
- else
- i_new = 0;
- p_temp = pp_items[i_position];
- pp_items[i_position] = pp_items[i_new];
- pp_items[i_new] = p_temp;
- }
- return VLC_SUCCESS;
- }
- vlc_mutex_lock( &sort_lock );
- sort_mode = i_mode;
- sort_type = i_type;
- qsort(pp_items,i_items,sizeof(pp_items[0]),playlist_cmp);
- vlc_mutex_unlock( &sort_lock );
- return VLC_SUCCESS;
- }
- static int playlist_cmp(const void *first, const void *second)
- {
- #define META_STRCASECMP_NAME( ) {
- char *psz_i = input_item_GetTitleFbName( (*(playlist_item_t **)first)->p_input );
- char *psz_ismall = input_item_GetTitleFbName( (*(playlist_item_t **)second)->p_input );
- if( psz_i != NULL && psz_ismall != NULL ) i_test = strcasecmp( psz_i, psz_ismall );
- else if ( psz_i == NULL && psz_ismall != NULL ) i_test = 1;
- else if ( psz_ismall == NULL && psz_i != NULL ) i_test = -1;
- else i_test = 0;
- free( psz_i );
- free( psz_ismall );
- }
- #define DO_META_SORT_ADV( node, integer ) {
- char *psz_a = input_item_GetMeta( (*(playlist_item_t **)first)->p_input, vlc_meta_##node );
- char *psz_b = input_item_GetMeta( (*(playlist_item_t **)second)->p_input, vlc_meta_##node );
- /* Nodes go first */
- if( (*(playlist_item_t **)first)->i_children == -1 && (*(playlist_item_t **)second)->i_children >= 0 )
- i_test = 1;
- else if( (*(playlist_item_t **)first)->i_children >= 0 &&
- (*(playlist_item_t **)second)->i_children == -1 )
- i_test = -1;
- /* Both are nodes, sort by name */
- else if( (*(playlist_item_t **)first)->i_children >= 0 &&
- (*(playlist_item_t **)second)->i_children >= 0 )
- {
- META_STRCASECMP_NAME( )
- }
- /* Both are items */
- else if( psz_a == NULL && psz_b != NULL )
- i_test = 1;
- else if( psz_a != NULL && psz_b == NULL )
- i_test = -1;
- /* No meta, sort by name */
- else if( psz_a == NULL && psz_b == NULL )
- {
- META_STRCASECMP_NAME( );
- }
- else
- {
- if( !integer ) i_test = strcasecmp( psz_a, psz_b );
- else i_test = atoi( psz_a ) - atoi( psz_b );
- }
- free( psz_a );
- free( psz_b );
- }
- #define DO_META_SORT( node ) DO_META_SORT_ADV( node, false )
- int i_test = 0;
- if( sort_mode == SORT_TITLE )
- {
- META_STRCASECMP_NAME( );
- }
- else if( sort_mode == SORT_TITLE_NUMERIC )
- {
- char *psz_i = input_item_GetTitleFbName(
- (*(playlist_item_t **)first)->p_input );
- char *psz_ismall = input_item_GetTitleFbName(
- (*(playlist_item_t **)second)->p_input );
- i_test = atoi( psz_i ) - atoi( psz_ismall );
- free( psz_i );
- free( psz_ismall );
- }
- else if( sort_mode == SORT_DURATION )
- {
- i_test = input_item_GetDuration( (*(playlist_item_t **)first)->p_input ) -
- input_item_GetDuration( (*(playlist_item_t **)second)->p_input );
- }
- else if( sort_mode == SORT_ARTIST )
- {
- DO_META_SORT( Artist );
- /* sort by artist, album, tracknumber */
- if( i_test == 0 )
- DO_META_SORT( Album );
- if( i_test == 0 )
- DO_META_SORT_ADV( TrackNumber, true );
- }
- else if( sort_mode == SORT_GENRE )
- {
- DO_META_SORT( Genre );
- }
- else if( sort_mode == SORT_ALBUM )
- {
- DO_META_SORT( Album );
- /* Sort by tracknumber if albums are the same */
- if( i_test == 0 )
- DO_META_SORT_ADV( TrackNumber, true );
- }
- else if( sort_mode == SORT_TRACK_NUMBER )
- {
- DO_META_SORT_ADV( TrackNumber, true );
- }
- else if( sort_mode == SORT_DESCRIPTION )
- {
- DO_META_SORT( Description );
- }
- else if( sort_mode == SORT_ID )
- {
- i_test = (*(playlist_item_t **)first)->i_id - (*(playlist_item_t **)second)->i_id;
- }
- else if( sort_mode == SORT_TITLE_NODES_FIRST )
- {
- /* Alphabetic sort, all nodes first */
- if( (*(playlist_item_t **)first)->i_children == -1 &&
- (*(playlist_item_t **)second)->i_children >= 0 )
- {
- i_test = 1;
- }
- else if( (*(playlist_item_t **)first)->i_children >= 0 &&
- (*(playlist_item_t **)second)->i_children == -1 )
- {
- i_test = -1;
- }
- else
- {
- META_STRCASECMP_NAME();
- }
- }
- else if( sort_mode == SORT_URI )
- {
- char *psz_i = input_item_GetURI( (*(playlist_item_t **)first)->p_input );
- char *psz_ismall =
- input_item_GetURI( (*(playlist_item_t **)second)->p_input );
- i_test = strcasecmp( psz_i, psz_ismall );
- free( psz_i );
- free( psz_ismall );
- }
- if ( sort_type == ORDER_REVERSE )
- i_test = i_test * -1;
- #undef DO_META_SORT
- #undef DO_META_SORT_ADV
- return i_test;
- }