hxaudses.h

linux下的一款播放器

/* ***** BEGIN LICENSE BLOCK *****
 * Source last modified: $Id: hxaudses.h,v 1.11.2.2 2004/10/25 21:14:16 gwright Exp $
 * 
 * Portions Copyright (c) 1995-2004 RealNetworks, Inc. All Rights Reserved.
 * 
 * The contents of this file, and the files included with this file,
 * are subject to the current version of the RealNetworks Public
 * Source License (the "RPSL") available at
 * http://www.helixcommunity.org/content/rpsl unless you have licensed
 * the file under the current version of the RealNetworks Community
 * Source License (the "RCSL") available at
 * http://www.helixcommunity.org/content/rcsl, in which case the RCSL
 * will apply. You may also obtain the license terms directly from
 * RealNetworks.  You may not use this file except in compliance with
 * the RPSL or, if you have a valid RCSL with RealNetworks applicable
 * to this file, the RCSL.  Please see the applicable RPSL or RCSL for
 * the rights, obligations and limitations governing use of the
 * contents of the file.
 * 
 * Alternatively, the contents of this file may be used under the
 * terms of the GNU General Public License Version 2 or later (the
 * "GPL") in which case the provisions of the GPL are applicable
 * instead of those above. If you wish to allow use of your version of
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 * to use your version of this file under the terms of either the RPSL
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 * 
 * This file is part of the Helix DNA Technology. RealNetworks is the
 * developer of the Original Code and owns the copyrights in the
 * portions it created.
 * 
 * This file, and the files included with this file, is distributed
 * and made available on an 'AS IS' basis, WITHOUT WARRANTY OF ANY
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 * ENJOYMENT OR NON-INFRINGEMENT.
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 * Technology Compatibility Kit Test Suite(s) Location:
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 * Contributor(s):
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 * ***** END LICENSE BLOCK ***** */

#ifndef _HXAUDSES_H
#define _HXAUDSES_H

#include "hxaudtyp.h" 

#ifdef _UNIX
#include <fcntl.h>
#include <sys/stat.h>
#endif

//  IHXTimelineWatcher defines.
#  define TLW_PAUSE    1
#  define TLW_RESUME   2
#  define TLW_CLOSE    3
#  define TLW_TIMESYNC 4

// foward decls.
struct IHXCallback;
struct IHXScheduler;
struct IHXPreferences;
struct IHXAudioDeviceResponse;
struct IHXAudioPlayerResponse;
struct IHXAudioAdviseSink;
struct IHXAudioDeviceManager;
struct IHXAudioHook;
struct IHXInterruptState;

typedef struct _HXAudioFormat HXAudioFormat;
class CHXAudioPlayer;

class CHXAudioDevice;
class CHXAudioStream;
class CHXSimpleList;
class HXVolumeAdviseSink;

struct IHXBuffer;

class Timeval;

class HXThread;
class HXMutex;
class HXEvent;

#ifdef HELIX_CONFIG_MIN_PCM_PUSHDOWN_BYTES
#define MINIMUM_INITIAL_PUSHDOWN    100
#else
#define MINIMUM_INITIAL_PUSHDOWN    4000
#endif

typedef enum
{
    BUFFER_NONE     = 0,
    BUFFER_PLAYER   = 1,
    BUFFER_SESSION  = 2
} BufType;

class   CHXAudioSession : public IHXAudioDeviceResponse, 
                          public IHXAudioDeviceManager,
                          public IHXAudioHookManager,
                          public IHXAudioDeviceManager2,
#ifdef HELIX_FEATURE_VOLUME                          
                          public IHXVolumeAdviseSink,
#endif                          
                          public IHXCallback,
                          public IHXAudioResamplerManager,
#if defined(HELIX_FEATURE_TIMELINE_WATCHER)
                          public IHXTimelineManager,
#endif
                          public IHXAudioPushdown2
{
  public:
    /*
     *      IUnknown methods
     */
    STDMETHOD(QueryInterface)   (THIS_
                                 REFIID riid,
                                 void** ppvObj);

    STDMETHOD_(ULONG32,AddRef)  (THIS);

    STDMETHOD_(ULONG32,Release) (THIS);

    CHXAudioSession(void);

#if defined(HELIX_FEATURE_TIMELINE_WATCHER)    
    //IHXTimelineManager methods...
    STDMETHOD(AddTimelineWatcher)    (THIS_ IHXTimelineWatcher* );
    STDMETHOD(RemoveTimelineWatcher) (THIS_ IHXTimelineWatcher* );
#endif


#ifdef HELIX_FEATURE_VOLUME                          
    //IHXVolumeAdviseSink methods
    inline STDMETHOD(OnVolumeChange) (THIS_ const UINT16 uVolume )
    {
        SetVolume(uVolume);
        return HXR_OK;
    }

    inline STDMETHOD(OnMuteChange)(THIS_ const BOOL bMute )
    {
        SetMute(bMute);
        return HXR_OK;
    }
#endif
    
    /*
     *      IHXAudioDeviceManager methods
     */

    /************************************************************************
     *  Method:
     *      IHXAudioDeviceManager::Replace
     *  Purpose:
     *  This is used to replace the default implementation of the audio
     *  device by the given audio device interface. 
     */
    STDMETHOD(Replace) (THIS_
                        IHXAudioDevice*    /*IN*/ pAudioDevice);

    /************************************************************************
     *  Method:
     *      IHXAudioDeviceManager::Remove
     *  Purpose:
     *  This is used to remove the audio device given to the manager in
     *  the earlier call to Replace.
     */
    STDMETHOD(Remove) (THIS_
                       IHXAudioDevice*    /*IN*/ pAudioDevice);


    /************************************************************************
     *  Method:
     *   IHXAudioDeviceManager::AddFinalHook
     *  Purpose:
     *       One last chance to modify data being written to the audio device.
     *       This hook allows the user to change the audio format that
     *   is to be written to the audio device. This can be done in call
     *   to OnInit() in IHXAudioHook.
     */
    STDMETHOD(SetFinalHook) (THIS_
                             IHXAudioHook*      /*IN*/ pHook
                             );

    /************************************************************************
     *  Method:
     *   IHXAudioDeviceManager::RemoveFinalHook
     *  Purpose:
     *       Remove final hook
     */
    STDMETHOD(RemoveFinalHook)  (THIS_
                                 IHXAudioHook*    /*IN*/ pHook
                                 );

    /************************************************************************
     *  Method:
     *      IHXAudioDeviceManager::GetAudioFormat
     *  Purpose:
     *           Returns the audio format in which the audio device is opened.
     *           This function will fill in the pre-allocated HXAudioFormat 
     *           structure passed in.
     */
    STDMETHOD(GetAudioFormat)   (THIS_
                                 HXAudioFormat*      /*IN/OUT*/pAudioFormat);

    /*
     *      IHXAudioDeviceResponse methods
     */

    /************************************************************************
     *  Method:
     *      IHXAudioDeviceResponse::OnTimeSync
     *  Purpose:
     *      Notification interface provided by users of the IHXAudioDevice
     *      interface. This method is called by the IHXAudioDevice when
     *      audio playback occurs.
     */
    STDMETHOD(OnTimeSync) (THIS_
                           ULONG32                         /*IN*/ ulTimeEnd);

    /*
     *  IHXAudioHookManager methods
     */
    /************************************************************************
     *  Method:
     *      IHXAudioHookManager::AddHook
     *  Purpose:
     *           Use this to add a hook 
     */
    STDMETHOD(AddHook)   (THIS_
                          IHXAudioHook* /*IN*/ pHook);

    /************************************************************************
     *  Method:
     *      IHXAudioHookManager::RemoveHook
     *  Purpose:
     *           Use this to remove a hook 
     */
    STDMETHOD(RemoveHook) (THIS_
                           IHXAudioHook* /*IN*/ pHook);

    /*
     *  IHXAudioDeviceManager2 methods
     */

    /**********************************************************************
     *  Method:
     *      IHXAudioDeviceManager2::IsReplacedDevice
     *  Purpose:
     *  This is used to determine if the audio device has been replaced.
     */
    STDMETHOD_(BOOL, IsReplacedDevice) (THIS);

    /*
     *  IHXAudioResamplerManager methods
     *
     */
    STDMETHOD(CreateResampler) (THIS_
                                HXAudioFormat               inAudioFormat,
                                REF(HXAudioFormat)          outAudioFormat,
                                REF(IHXAudioResampler*)    pResampler);

    /*
     *  IHXAudioPushdown methods
     */
    /************************************************************************
     *  Method:
     *      IHXAudioPushdown::SetAudioPushdown
     *  Purpose:
     *           Use this to set the minimum audio pushdown value in ms.
     *           This is the amount of audio data that is being written 
     *           to the audio device before starting playback.
     */
    STDMETHOD(SetAudioPushdown) (THIS_
                                 UINT32 /*IN*/ ulMinimumPushdown);

    /************************************************************************
     *  Method:
     *      IHXAudioPushdown2::GetAudioPushdown
     *  Purpose:
     *           Use this to get the minimum audio pushdown value in ms.
     *           This is the amount of audio data that is being written 
     *           to the audio device before starting playback.
     */
    STDMETHOD(GetAudioPushdown) (THIS_
                                 REF(UINT32) /*OUT*/ ulAudioPushdown);

    /************************************************************************
     *  Method:
     *      IHXAudioPushdown2::GetCurrentAudioDevicePushdown
     *  Purpose:
     *           Use this to get the audio pushed down to the audio device and haven't
     *           been played yet
     */
    STDMETHOD(GetCurrentAudioDevicePushdown)   (THIS_
                                                REF(UINT32) /*OUT*/ ulAudioPusheddown);

    /* It gets Scheduler interface from the context.
     * The session object keeps a list of audio player objects.
     * Create a session list; add this session to the list.
     */
    HX_RESULT Init(IUnknown* pContext);

    /* Setup is called by Audio Player object.
     */
    HX_RESULT Setup (BOOL bHasStreams);

    /* Create audio player. The RMA session object calls this
     * for each Player it knows about.
     */
    virtual HX_RESULT CreateAudioPlayer(CHXAudioPlayer**  ppAudioPlayer);
    HX_RESULT         _CreateAudioPlayer(CHXAudioPlayer** ppAudioPlayer);

    HX_RESULT       CloseAudioPlayer( CHXAudioPlayer*   pAudioPlayer);

    void            Close(void);

    /* The session object determines the audio device format based
     * on all of its players.
     */
    HX_RESULT       GetDeviceFormat(void);

    /* Open is called to open the audio device.
     */
    HX_RESULT       OpenAudio    (void);

    HX_RESULT       OpenDevice   (void);