item-ext.c
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上传日期:2009-03-27
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文件大小:18k
- /*****************************************************************************
- * item-ext.c : Playlist item management functions
- *****************************************************************************
- * Copyright (C) 1999-2004 VideoLAN
- * $Id: item-ext.c 7997 2004-06-18 11:35:45Z sigmunau $
- *
- * Authors: Samuel Hocevar <sam@zoy.org>
- * Cl閙ent 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., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
- *****************************************************************************/
- #include <stdlib.h> /* free(), strtol() */
- #include <stdio.h> /* sprintf() */
- #include <string.h> /* strerror() */
- #include <vlc/vlc.h>
- #include <vlc/input.h>
- #include "vlc_playlist.h"
- /***************************************************************************
- * Item creation/addition functions
- ***************************************************************************/
- /**
- * Add a MRL into the playlist, duration and options given
- *
- * param p_playlist the playlist to add into
- * param psz_uri the mrl to add to the playlist
- * param psz_name a text giving a name or description of this item
- * param i_mode the mode used when adding
- * param i_pos the position in the playlist where to add. If this is
- * PLAYLIST_END the item will be added at the end of the playlist
- * regardless of it's size
- * param i_duration length of the item in milliseconds.
- * param ppsz_options an array of options
- * param i_options the number of options
- * return The id of the playlist item
- */
- int playlist_AddExt( playlist_t *p_playlist, const char * psz_uri,
- const char *psz_name, int i_mode, int i_pos,
- mtime_t i_duration, const char **ppsz_options,
- int i_options )
- {
- playlist_item_t *p_item =
- playlist_ItemNew( p_playlist , psz_uri, psz_name );
- if( p_item == NULL )
- {
- msg_Err( p_playlist, "unable to add item to playlist" );
- return -1;
- }
- p_item->input.i_duration = i_duration;
- p_item->input.i_options = i_options;
- p_item->input.ppsz_options = NULL;
- for( p_item->input.i_options = 0; p_item->input.i_options < i_options;
- p_item->input.i_options++ )
- {
- if( !p_item->input.i_options )
- {
- p_item->input.ppsz_options = malloc( i_options * sizeof(char *) );
- if( !p_item->input.ppsz_options ) break;
- }
- p_item->input.ppsz_options[p_item->input.i_options] =
- strdup( ppsz_options[p_item->input.i_options] );
- }
- return playlist_AddItem( p_playlist, p_item, i_mode, i_pos );
- }
- /**
- * Add a MRL into the playlist.
- *
- * param p_playlist the playlist to add into
- * param psz_uri the mrl to add to the playlist
- * param psz_name a text giving a name or description of this item
- * param i_mode the mode used when adding
- * param i_pos the position in the playlist where to add. If this is
- * PLAYLIST_END the item will be added at the end of the playlist
- * regardless of it's size
- * return The id of the playlist item
- */
- int playlist_Add( playlist_t *p_playlist, const char *psz_uri,
- const char *psz_name, int i_mode, int i_pos )
- {
- return playlist_AddExt( p_playlist, psz_uri, psz_name, i_mode, i_pos,
- -1, NULL, 0 );
- }
- /***************************************************************************
- * Item search functions
- ***************************************************************************/
- /**
- * Search the position of an item by its id
- * This function must be entered with the playlist lock
- *
- * param p_playlist the playlist
- * param i_id the id to find
- * return the position, or VLC_EGENERIC on failure
- */
- int playlist_GetPositionById( playlist_t * p_playlist , int i_id )
- {
- int i;
- for( i = 0 ; i < p_playlist->i_size ; i++ )
- {
- if( p_playlist->pp_items[i]->i_id == i_id )
- {
- return i;
- }
- }
- return VLC_EGENERIC;
- }
- /**
- * Search an item by its id
- *
- * param p_playlist the playlist
- * param i_id the id to find
- * return the item, or NULL on failure
- */
- playlist_item_t * playlist_ItemGetById( playlist_t * p_playlist , int i_id )
- {
- int i;
- for( i = 0 ; i < p_playlist->i_size ; i++ )
- {
- if( p_playlist->pp_items[i]->i_id == i_id )
- {
- return p_playlist->pp_items[i];
- }
- }
- return NULL;
- }
- /**
- * Search an item by its position
- * This function must be entered with the playlist lock
- *
- * param p_playlist the playlist
- * param i_pos the position of the item to find
- * return the item, or NULL on failure
- */
- playlist_item_t * playlist_ItemGetByPos( playlist_t * p_playlist , int i_pos )
- {
- if( i_pos >= 0 && i_pos < p_playlist->i_size)
- {
- return p_playlist->pp_items[i_pos];
- }
- else if( p_playlist->i_size > 0)
- {
- return p_playlist->pp_items[p_playlist->i_index];
- }
- else
- {
- return NULL;
- }
- }
- /**********************************************************************
- * playlist_item_t structure accessors
- * These functions give access to the fields of the playlist_item_t
- * structure
- **********************************************************************/
- /**
- * Set the group of a playlist item
- *
- * param p_item the item
- * param i_group the group to set
- * return VLC_SUCCESS on success
- */
- int playlist_ItemSetGroup( playlist_item_t *p_item, int i_group)
- {
- p_item->i_group = i_group;
- return VLC_SUCCESS;
- }
- /**
- * Set the group of a playlist item (by position)
- * This function must be entered with the playlist lock
- * Legacy function due to disappear (locks the whole playlist)
- *
- * param p_playlist the playlist
- * param i_pos the postition of the item of which we change the group
- * param i_group the new group
- * return VLC_SUCCESS on success, VLC_EGENERIC on failure
- */
- int playlist_SetGroup( playlist_t *p_playlist, int i_pos, int i_group )
- {
- vlc_value_t val;
- playlist_item_t *p_item;
- if( !p_playlist )
- {
- return VLC_ENOOBJ;
- }
- p_item = playlist_ItemGetByPos( p_playlist , i_pos );
- if( !p_item )
- {
- return VLC_ENOOBJ;
- }
- vlc_mutex_lock( &p_item->input.lock );
- playlist_ItemSetGroup( p_item , i_group );
- vlc_mutex_unlock( &p_item->input.lock );
- val.b_bool = (i_pos >= 0 && i_pos < p_playlist->i_size ) ? i_pos : -1;
- var_Set( p_playlist, "item-change", val );
- return VLC_SUCCESS;
- }
- /**
- * Set the name of a playlist item
- *
- * param p_item the item
- * param psz_name the new name
- * return VLC_SUCCESS on success, VLC_EGENERIC on failure
- */
- int playlist_ItemSetName( playlist_item_t *p_item, char *psz_name )
- {
- if( psz_name && p_item )
- {
- p_item->input.psz_name = strdup( psz_name );
- return VLC_SUCCESS;
- }
- return VLC_EGENERIC;
- }
- /**
- * Set the name of a playlist item (by position)
- * This function must be entered with the playlist lock
- * Legacy function due to disappear (locks the whole playlist)
- *
- * param p_playlist the playlist
- * param i_pos the position of the item of which we change the name
- * param psz_name the new name
- * return VLC_SUCCESS on success, VLC_EGENERIC on failure
- */
- int playlist_SetName( playlist_t *p_playlist, int i_pos, char *psz_name )
- {
- vlc_value_t val;
- playlist_item_t *p_item;
- if( !p_playlist )
- {
- return VLC_ENOOBJ;
- }
- p_item = playlist_ItemGetByPos( p_playlist , i_pos );
- if( !p_item )
- {
- return VLC_ENOOBJ;
- }
- vlc_mutex_lock( &p_item->input.lock );
- playlist_ItemSetName( p_item , psz_name );
- vlc_mutex_unlock( &p_item->input.lock );
- val.b_bool = (i_pos >= 0 && i_pos < p_playlist->i_size ) ? i_pos : -1;
- var_Set( p_playlist, "item-change", val );
- return VLC_SUCCESS;
- }
- /**
- * Set the duration of a playlist item
- * This function must be entered with the item lock
- *
- * param p_item the item
- * param i_duration the new duration
- * return VLC_SUCCESS on success, VLC_EGENERIC on failure
- */
- int playlist_ItemSetDuration( playlist_item_t *p_item, mtime_t i_duration )
- {
- char psz_buffer[MSTRTIME_MAX_SIZE];
- if( p_item )
- {
- p_item->input.i_duration = i_duration;
- if( i_duration != -1 )
- {
- secstotimestr( psz_buffer, i_duration/1000000 );
- }
- else
- {
- memcpy( psz_buffer, "--:--:--", sizeof("--:--:--") );
- }
- playlist_ItemAddInfo( p_item, _("General") , _("Duration"),
- "%s", psz_buffer );
- return VLC_SUCCESS;
- }
- return VLC_EGENERIC;
- }
- /**
- * Set the duration of a playlist item
- * This function must be entered with the playlist lock
- * Legacy function due to disappear (locks the whole playlist)
- *
- * param p_playlist the playlist
- * param i_pos the position of the item of which we change the duration
- * param i_duration the duration to set
- * return VLC_SUCCESS on success, VLC_EGENERIC on failure
- */
- int playlist_SetDuration( playlist_t *p_playlist, int i_pos, mtime_t i_duration )
- {
- vlc_value_t val;
- playlist_item_t *p_item;
- if( !p_playlist )
- {
- return VLC_ENOOBJ;
- }
- p_item = playlist_ItemGetByPos( p_playlist , i_pos );
- if( !p_item )
- {
- return VLC_ENOOBJ;
- }
- vlc_mutex_lock( &p_item->input.lock );
- playlist_ItemSetDuration( p_item , i_duration );
- vlc_mutex_unlock( &p_item->input.lock );
- val.b_bool = (i_pos >= 0 && i_pos < p_playlist->i_size ) ? i_pos : -1;
- var_Set( p_playlist, "item-change", val );
- return VLC_SUCCESS;
- }
- /**********************************************************************
- * Actions on existing playlist items
- **********************************************************************/
- /**
- * delete an item from a playlist.
- *
- * param p_playlist the playlist to remove from.
- * param i_pos the position of the item to remove
- * return returns 0
- */
- int playlist_Delete( playlist_t * p_playlist, int i_pos )
- {
- vlc_value_t val;
- /* if i_pos is the current played item, playlist should stop playing it */
- if( ( p_playlist->i_status == PLAYLIST_RUNNING) &&
- (p_playlist->i_index == i_pos) )
- {
- playlist_Command( p_playlist, PLAYLIST_STOP, 0 );
- }
- vlc_mutex_lock( &p_playlist->object_lock );
- if( i_pos >= 0 && i_pos < p_playlist->i_size )
- {
- playlist_item_t *p_item = p_playlist->pp_items[i_pos];
- msg_Dbg( p_playlist, "deleting playlist item `%s'",
- p_item->input.psz_name );
- playlist_ItemDelete( p_item );
- if( i_pos <= p_playlist->i_index )
- {
- p_playlist->i_index--;
- }
- /* Renumber the playlist */
- REMOVE_ELEM( p_playlist->pp_items, p_playlist->i_size, i_pos );
- if( p_playlist->i_enabled > 0 ) p_playlist->i_enabled--;
- }
- vlc_mutex_unlock( &p_playlist->object_lock );
- val.b_bool = VLC_TRUE;
- var_Set( p_playlist, "intf-change", val );
- return 0;
- }
- /**
- * Clear all playlist items
- *
- * param p_playlist the playlist to be cleared.
- * return returns 0
- */
- int playlist_Clear( playlist_t * p_playlist )
- {
- while( p_playlist->i_groups > 0 )
- {
- playlist_DeleteGroup( p_playlist, p_playlist->pp_groups[0]->i_id );
- }
- while( p_playlist->i_size > 0 )
- {
- playlist_Delete( p_playlist, 0 );
- }
- p_playlist->i_index = -1;
- p_playlist->i_size = 0;
- p_playlist->pp_items = NULL;
- p_playlist->i_groups = 0;
- p_playlist->pp_groups = NULL;
- return 0;
- }
- /**
- * Disables a playlist item
- *
- * param p_playlist the playlist to disable from.
- * param i_pos the position of the item to disable
- * return returns 0
- */
- int playlist_Disable( playlist_t * p_playlist, int i_pos )
- {
- vlc_value_t val;
- vlc_mutex_lock( &p_playlist->object_lock );
- if( i_pos >= 0 && i_pos < p_playlist->i_size )
- {
- msg_Dbg( p_playlist, "disabling playlist item `%s'",
- p_playlist->pp_items[i_pos]->input.psz_name );
- if( p_playlist->pp_items[i_pos]->b_enabled == VLC_TRUE )
- p_playlist->i_enabled--;
- p_playlist->pp_items[i_pos]->b_enabled = VLC_FALSE;
- }
- vlc_mutex_unlock( &p_playlist->object_lock );
- val.b_bool = i_pos;
- var_Set( p_playlist, "item-change", val );
- return 0;
- }
- /**
- * Enables a playlist item
- *
- * param p_playlist the playlist to enable from.
- * param i_pos the position of the item to enable
- * return returns 0
- */
- int playlist_Enable( playlist_t * p_playlist, int i_pos )
- {
- vlc_value_t val;
- vlc_mutex_lock( &p_playlist->object_lock );
- if( i_pos >= 0 && i_pos < p_playlist->i_size )
- {
- msg_Dbg( p_playlist, "enabling playlist item `%s'",
- p_playlist->pp_items[i_pos]->input.psz_name );
- if( p_playlist->pp_items[i_pos]->b_enabled == VLC_FALSE )
- p_playlist->i_enabled++;
- p_playlist->pp_items[i_pos]->b_enabled = VLC_TRUE;
- }
- vlc_mutex_unlock( &p_playlist->object_lock );
- val.b_bool = i_pos;
- var_Set( p_playlist, "item-change", val );
- return 0;
- }
- /**
- * Disables a playlist group
- *
- * param p_playlist the playlist to disable from.
- * param i_group the id of the group to disable
- * return returns 0
- */
- int playlist_DisableGroup( playlist_t * p_playlist, int i_group )
- {
- vlc_value_t val;
- int i;
- vlc_mutex_lock( &p_playlist->object_lock );
- msg_Dbg( p_playlist, "disabling group %i", i_group );
- for( i = 0 ; i< p_playlist->i_size; i++ )
- {
- if( p_playlist->pp_items[i]->i_group == i_group )
- {
- msg_Dbg( p_playlist, "disabling playlist item `%s'",
- p_playlist->pp_items[i]->input.psz_name );
- if( p_playlist->pp_items[i]->b_enabled == VLC_TRUE )
- p_playlist->i_enabled--;
- p_playlist->pp_items[i]->b_enabled = VLC_FALSE;
- val.b_bool = i;
- var_Set( p_playlist, "item-change", val );
- }
- }
- vlc_mutex_unlock( &p_playlist->object_lock );
- return 0;
- }
- /**
- * Enables a playlist group
- *
- * param p_playlist the playlist to enable from.
- * param i_group the id of the group to enable
- * return returns 0
- */
- int playlist_EnableGroup( playlist_t * p_playlist, int i_group )
- {
- vlc_value_t val;
- int i;
- vlc_mutex_lock( &p_playlist->object_lock );
- for( i = 0; i< p_playlist->i_size; i++ )
- {
- if( p_playlist->pp_items[i]->i_group == i_group )
- {
- msg_Dbg( p_playlist, "enabling playlist item `%s'",
- p_playlist->pp_items[i]->input.psz_name );
- if( p_playlist->pp_items[i]->b_enabled == VLC_FALSE )
- p_playlist->i_enabled++;
- p_playlist->pp_items[i]->b_enabled = VLC_TRUE;
- val.b_bool = i;
- var_Set( p_playlist, "item-change", val );
- }
- }
- vlc_mutex_unlock( &p_playlist->object_lock );
- return 0;
- }
- /**
- * Move an item in a playlist
- *
- * Move the item in the playlist with position i_pos before the current item
- * at position i_newpos.
- * param p_playlist the playlist to move items in
- * param i_pos the position of the item to move
- * param i_newpos the position of the item that will be behind the moved item
- * after the move
- * return returns VLC_SUCCESS
- */
- int playlist_Move( playlist_t * p_playlist, int i_pos, int i_newpos )
- {
- vlc_value_t val;
- vlc_mutex_lock( &p_playlist->object_lock );
- /* take into account that our own row disappears. */
- if( i_pos < i_newpos ) i_newpos--;
- if( i_pos >= 0 && i_newpos >=0 && i_pos <= p_playlist->i_size &&
- i_newpos <= p_playlist->i_size )
- {
- playlist_item_t * temp;
- msg_Dbg( p_playlist, "moving playlist item `%s' (%i -> %i)",
- p_playlist->pp_items[i_pos]->input.psz_name, i_pos, i_newpos);
- if( i_pos == p_playlist->i_index )
- {
- p_playlist->i_index = i_newpos;
- }
- else if( i_pos > p_playlist->i_index && i_newpos <= p_playlist->i_index )
- {
- p_playlist->i_index++;
- }
- else if( i_pos < p_playlist->i_index && i_newpos >= p_playlist->i_index )
- {
- p_playlist->i_index--;
- }
- if ( i_pos < i_newpos )
- {
- temp = p_playlist->pp_items[i_pos];
- while ( i_pos < i_newpos )
- {
- p_playlist->pp_items[i_pos] = p_playlist->pp_items[i_pos+1];
- i_pos++;
- }
- p_playlist->pp_items[i_newpos] = temp;
- }
- else if ( i_pos > i_newpos )
- {
- temp = p_playlist->pp_items[i_pos];
- while ( i_pos > i_newpos )
- {
- p_playlist->pp_items[i_pos] = p_playlist->pp_items[i_pos-1];
- i_pos--;
- }
- p_playlist->pp_items[i_newpos] = temp;
- }
- }
- vlc_mutex_unlock( &p_playlist->object_lock );
- val.b_bool = VLC_TRUE;
- var_Set( p_playlist, "intf-change", val );
- return VLC_SUCCESS;
- }