playlist.h

WINCE XAUDIO可播放各种音乐格式内附SOURCE CODE可以再不同CPU 平台编译测试

/*****************************************************************
|
|      PlayList Management
|
|
|      (c) 1996-1998 MpegTV, LLC
|      Author: Gilles Boccon-Gibod ([e-mail])
|
 ****************************************************************/

#ifndef __PLAYLIST_H__
#define __PLAYLIST_H__

/*----------------------------------------------------------------------
|       constants
+---------------------------------------------------------------------*/
const int PLAYLIST_SUCCESS                  =  0;
const int PLAYLIST_FAILURE                  = -1;
const int PLAYLIST_ERROR_INVALID_PARAMETERS = -2;

const int PLAYLIST_MODE_PLAYING = 0x01;
const int PLAYLIST_MODE_LOOP    = 0x02;
const int PLAYLIST_MODE_RANDOM  = 0x04;

const int PLAYLIST_STATUS_PLAYED = 0x01;

/*----------------------------------------------------------------------
|       types
+---------------------------------------------------------------------*/
class PlayList;
class PlayListItem;
typedef enum
{
    PLAYLIST_EVENT_ITEM_CREATED,
    PLAYLIST_EVENT_ITEM_DELETED,
    PLAYLIST_EVENT_ITEM_CHANGED,
    PLAYLIST_EVENT_CURRENT_CHANGED,
    PLAYLIST_EVENT_STOP_PLAYING
} PlayListEventType;

typedef enum {
    PLAYLIST_ACTION_NONE,
    PLAYLIST_ACTION_PLAY
} PlayListAction;

typedef struct 
{
    PlayListItem  *current;
    PlayListItem  *previous;
    PlayListAction action;
} PlayListCurrentChangedEvent;

typedef void(*PlayListCallback)(void *client,
                                PlayList *, 
                                PlayListEventType event,
                                void *event_data);

/*----------------------------------------------------------------------
|       PlayList class
+---------------------------------------------------------------------*/
class PlayList {
friend class PlayListItem;
protected:
    void            *m_CallbackClient;
    PlayListCallback m_CallbackFunction;
    PlayListItem    *m_Root;
    PlayListItem    *m_Current;
    unsigned int     m_Mode;
    PlayListAction   m_DefaultAction;

public:
    PlayList();
    ~PlayList();
    void RegisterCallback(PlayListCallback callback, void *client);
    int  AddTrack(const char *name);
    int  AddTrack(PlayListItem *parent, const char *name);
    int  AddGroup(const char *name);
    int  AddGroup(PlayListItem *parent, const char *name);
    int  Delete(PlayListItem *);
    void Clear();
    int  SetCurrent(PlayListItem *item, PlayListAction action = PLAYLIST_ACTION_NONE);
    int  Play();
    int  Stop();
    int  Next();
    int  Prev();
    void SetMode(unsigned int mask, unsigned int mode);
};

/*----------------------------------------------------------------------
|       PlayListItem class
+---------------------------------------------------------------------*/
class PlayListItem 
{
    friend class PlayList;

protected:
    // variables
    PlayList     *m_PlayList;
    unsigned int  m_Status;
    // methods
    void SetName(const char *name);
    int  DoAction(PlayListAction action);

public:
    // variables
    PlayListItem *m_Parent;
    PlayListItem *m_FirstChild;
    PlayListItem *m_RightSibling;
    PlayListItem *m_LeftSibling;
    unsigned long m_State;
    char         *m_FullName;
    char         *m_ShortName;
    char         *m_GroupName;
    unsigned long m_ClientData;

    // methods
    PlayListItem(PlayListItem *parent, const char *name);
    PlayListItem(PlayList *owner, const char *name);
    ~PlayListItem();
    void Init();
    void AddChild(PlayListItem *item);
    int  Play();
    int  Next();
    int  Prev();
};

#endif /* __PLAYLIST_H__ */