chxavplayerstate.h

来自「symbian 下的helix player源代码」· C头文件 代码 · 共 119 行

/************************************************************************
 * chxavplayerstate.h
 * ------------------
 *
 * Synopsis:
 * CHXAvPlayerState is helper class for CHXAvPlayer. It maintains player 
 * state info and dispatches event notifications to observers. Observers
 * can use this to query for current player state info.
 *
 *
 * Target:
 * Symbian OS
 *
 *
 * (c) 1995-2003 RealNetworks, Inc. Patents pending. All rights reserved.
 *
 ************************************************************************/

#ifndef CHXAVPLAYERSTATE_H__
#define CHXAVPLAYERSTATE_H__


#include "unkimp.h"
#include "hxstring.h"
#include "ihxpckts.h"
#include "hxurl.h"
#include "hxfiles.h"


//#include "chxavcallback.h"
#include "chxavplayerstatedispatch.h"
  

// class CHXAvPlayerState
class CHXAvPlayerState
{
public:

    // main player states
    enum State
    {
	Stopped,
        Initiating,
	Connecting,
	Playing,
        Seeking,
	Paused
    };

    // buffering sub-state applies while playing, seeking, paused
    enum BufferState
    {
        NotBuffering,
        BufferLoad,
        BufferSeek,
        BufferPlain
    };

public:

    CHXAvPlayerState();
    virtual ~CHXAvPlayerState();
    void ConstructL();

public:

    State GetState() const;
    BufferState GetBufferingState() const;
    UINT16 GetLastBufferPercent() const;

    void RemoveObserver(IHXSymPlayerStateObserver *observer);
    void AddObserver(IHXSymPlayerStateObserver *observer);

private:

    friend class CHXAvPlayer;

    // called by CHXAvPlayer
    void OnPlayInitiate(const char *url); 
    void OnNetConnect();
    void OnLoadSession(IHXRequest *request); 
    void OnResume();  
    void OnStop();
    void OnPause();
    void OnBuffering(ULONG32 type, UINT16 percent);
    void OnBeginSeek();
    void OnNewPos(ULONG32 time);
    void OnVolume(unsigned int percentVol);
    void OnMute(bool bMute);
    void OnError(HX_RESULT code);
    void OnAdvancePlaylist();

private:
    // implementation
    void ChangeState(State destState);
    void ChangeBufferState(BufferState destState);

    CHXAvPlayerStateDispatch* m_pDispatch;
    State  m_state; 
    BufferState m_bufferState;
    UINT16 m_lastBufferPercent;
    ULONG32 m_lastTime;

    //CHXAvCallback m_cbConnectStateTransition;
};

inline
CHXAvPlayerState::State CHXAvPlayerState::GetState() const { return m_state; }

inline
CHXAvPlayerState::BufferState CHXAvPlayerState::GetBufferingState() const { return m_bufferState; }

inline
UINT16 CHXAvPlayerState::GetLastBufferPercent() const { return m_lastBufferPercent; }


#endif // CHXAVPLAYERSTATE_H__