流媒体/Mpeg4/MP4

开发平台：
Visual C++

Playlist.cpp：源码内容
							/**************************************************************************************
 *                                                                                    *
 * This application contains code from OpenDivX and is released as a "Larger Work"    *
 * under that license. Consistant with that license, this application is released     *
 * under the GNU General Public License.                                              *
 *                                                                                    *
 * The OpenDivX license can be found at: http://www.projectmayo.com/opendivx/docs.php *
 * The GPL can be found at: http://www.gnu.org/copyleft/gpl.html                      *
 *                                                                                    *
 * Copyright (c) 2001 - Project Mayo                                                  *
 *                                                                                    *
 * Authors: Damien Chavarria <adrc at projectmayo.com>                                *
 *                                                                                    *
 **************************************************************************************/
#include "Playlist.h"
Playlist::Playlist()
{
	this->list             = NULL;
	this->nbr_items        = 0;
	this->current_position = -1;
}
Playlist::~Playlist()
{
}
int Playlist::Clear()
{
	this->nbr_items        = 0;
	this->current_position = -1;
	this->list             = NULL;
	return 1;
}
int Playlist::Reset() 
{
	if(this->list != NULL) {
		this->current_position = 0;
	}
	return 1;
}
char *Playlist::GetItemAt(int i)
{
	int index, j;
	list_t *node;
	if(this->list != NULL) {
		
		if( i < 0)
			return list->filename;
		if(i > this->nbr_items - 1)
			index = this->nbr_items - 1;
		else 
			index = i;
		node = this->list;
		for(j=0; j<index; j++) {
			node = node->next;
		}
		return node->filename;
	}
	return NULL;
}
int Playlist::Add(char *filename)
{
	list_t *item;
	item = (list_t *) malloc(sizeof(list_t));
	item->filename = filename;
	item->next = this->list;
	this->list = item;
	this->nbr_items++;
		
	return 1;
}
char *Playlist::Previous()
{
	if(this->list != NULL) {
		if(this->current_position == 0)
			return list->filename;
		this->current_position--;
		return GetItemAt(this->current_position);
	}
	return NULL;
}
char *Playlist::Next()
{
	if(this->list != NULL) {
		if(this->current_position == this->nbr_items - 1)
			return GetItemAt(this->current_position);
		this->current_position++;
		return GetItemAt(this->current_position);
	}
	return NULL;
}

						