📄 hxbufctl.h
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/* ***** BEGIN LICENSE BLOCK *****
* Version: RCSL 1.0/RPSL 1.0
*
* Portions Copyright (c) 1995-2003 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
* Version 1.0 (the "RPSL") available at
* http://www.helixcommunity.org/content/rpsl unless you have licensed
* the file under the RealNetworks Community Source License Version 1.0
* (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.
*
* 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 KIND, EITHER
* EXPRESS OR IMPLIED, AND REALNETWORKS HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, FITNESS
* FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
*
* Technology Compatibility Kit Test Suite(s) Location:
* http://www.helixcommunity.org/content/tck
*
* Contributor(s):
*
* ***** END LICENSE BLOCK ***** */
#ifndef HXBUFCTL_H
#define HXBUFCTL_H
class HXSource;
/****************************************************************************
*
* Interface:
*
* IHXBufferControl
*
* Purpose:
* Common interface for buffer control objects. These objects attempt
* to control a data source so that the amount of data buffered is
* bounded.
*
*
* IID_IHXBufferControl:
*
* {68B2AEF9-1384-46ec-A4D0-00680A7DBBAE}
*
*/
DEFINE_GUID(IID_IHXBufferControl, 0x68b2aef9, 0x1384, 0x46ec, 0xa4, 0xd0, 0x0,
0x68, 0xa, 0x7d, 0xbb, 0xae);
#undef INTERFACE
#define INTERFACE IHXBufferControl
DECLARE_INTERFACE_(IHXBufferControl, IUnknown)
{
/*
* IUnknown methods
*/
STDMETHOD(QueryInterface) (THIS_
REFIID riid,
void** ppvObj) PURE;
STDMETHOD_(ULONG32,AddRef) (THIS) PURE;
STDMETHOD_(ULONG32,Release) (THIS) PURE;
/*
* IHXBufferControl methods
*/
/************************************************************************
* Method:
* IHXBufferControl::Init
* Purpose:
* Initialize the buffer control object with a context
* so it can find the interfaces it needs to do buffer
* control
*/
STDMETHOD(Init) (THIS_ IUnknown* pContext) PURE;
/************************************************************************
* Method:
* IHXBufferControl::OnBuffering
* Purpose:
* Called while buffering
*/
STDMETHOD(OnBuffering) (THIS_ UINT32 ulRemainingInMs,
UINT32 ulRemainingInBytes) PURE;
/************************************************************************
* Method:
* IHXBufferControl::OnBufferingDone
* Purpose:
* Called when buffering is done
*/
STDMETHOD(OnBufferingDone)(THIS) PURE;
/************************************************************************
* Method:
* IHXBufferControl::OnResume
* Purpose:
* Called when playback is resumed
*/
STDMETHOD(OnResume) (THIS) PURE;
/************************************************************************
* Method:
* IHXBufferControl::OnPause
* Purpose:
* Called when playback is paused
*/
STDMETHOD(OnPause) (THIS) PURE;
/************************************************************************
* Method:
* IHXBufferControl::OnSeek
* Purpose:
* Called when a seek occurs
*/
STDMETHOD(OnSeek) (THIS) PURE;
/************************************************************************
* Method:
* IHXBufferControl::OnClipEnd
* Purpose:
* Called when we get the last packet in the clip
*/
STDMETHOD(OnClipEnd) (THIS) PURE;
/************************************************************************
* Method:
* IHXBufferControl::Close()
* Purpose:
* Called when the owner of this object wishes to shutdown
* and destroy this object. This call causes the buffer control
* object to release all it's interfaces references.
*/
STDMETHOD(Close)(THIS) PURE;
};
/****************************************************************************
*
* Interface:
*
* IHXWatermarkBufferControl
*
* Purpose:
* This buffer control object uses a set of watermarks to determine
* when it should adjust the source bandwidth. This is the buffer
* control algorithm historically used by the Helix Engine.
*
*
* IID_IHXWatermarkBufferControl:
*
* {68B2AEF9-1384-46ec-A4D0-00680A7DBBAF}
*
*/
DEFINE_GUID(IID_IHXWatermarkBufferControl, 0x68b2aef9, 0x1384, 0x46ec, 0xa4,
0xd0, 0x0, 0x68, 0xa, 0x7d, 0xbb, 0xaf);
#undef INTERFACE
#define INTERFACE IHXWatermarkBufferControl
DECLARE_INTERFACE_(IHXWatermarkBufferControl, IHXBufferControl)
{
/*
* IUnknown methods
*/
STDMETHOD(QueryInterface) (THIS_
REFIID riid,
void** ppvObj) PURE;
STDMETHOD_(ULONG32,AddRef) (THIS) PURE;
STDMETHOD_(ULONG32,Release) (THIS) PURE;
/*
* IHXBufferControl methods
*/
/************************************************************************
* Method:
* IHXBufferControl::Init
* Purpose:
* Initialize the buffer control object with a context
* so it can find the interfaces it needs to do buffer
* control
*/
STDMETHOD(Init) (THIS_ IUnknown* pContext) PURE;
/************************************************************************
* Method:
* IHXBufferControl::OnBuffering
* Purpose:
* Called while buffering
*/
STDMETHOD(OnBuffering) (THIS_ UINT32 ulRemainingInMs,
UINT32 ulRemainingInBytes) PURE;
/************************************************************************
* Method:
* IHXBufferControl::OnBufferingDone
* Purpose:
* Called when buffering is done
*/
STDMETHOD(OnBufferingDone)(THIS) PURE;
/************************************************************************
* Method:
* IHXBufferControl::OnResume
* Purpose:
* Called when playback is resumed
*/
STDMETHOD(OnResume) (THIS) PURE;
/************************************************************************
* Method:
* IHXBufferControl::OnPause
* Purpose:
* Called when playback is paused
*/
STDMETHOD(OnPause) (THIS) PURE;
/************************************************************************
* Method:
* IHXBufferControl::OnSeek
* Purpose:
* Called when a seek occurs
*/
STDMETHOD(OnSeek) (THIS) PURE;
/************************************************************************
* Method:
* IHXBufferControl::OnClipEnd
* Purpose:
* Called when we get the last packet in the clip
*/
STDMETHOD(OnClipEnd) (THIS) PURE;
/************************************************************************
* Method:
* IHXBufferControl::Close()
* Purpose:
* Called when the owner of this object wishes to shutdown
* and destroy this object. This call causes the buffer control
* object to release all it's interfaces references.
*/
STDMETHOD(Close)(THIS) PURE;
/*
* IHXWatermarkBufferControl methods
*/
/************************************************************************
* Method:
* IHXWatermarkBufferControl::SetSource
* Purpose:
* Tells the object what HXSource object it is associated with.
*/
STDMETHOD(SetSource)(THIS_ HXSource* pSource) PURE;
/************************************************************************
* Method:
* IHXWatermarkBufferControl::OnBufferReport
* Purpose:
* Initiates control operations based on buffering information.
*
*/
STDMETHOD(OnBufferReport)(THIS_ UINT32 ulBufferInMs,
UINT32 ulBuffer) PURE;
/************************************************************************
* Method:
* IHXWatermarkBufferControl::ClearChillState
* Purpose:
* Sets the chill state to NONE
*
*/
STDMETHOD(ClearChillState)(THIS) PURE;
};
/****************************************************************************
*
* Interface:
*
* IHXTransportBufferLimit
*
* Purpose:
* This interface allows you to control the number of bytes that
* are allowed to be buffered in the transport buffers. If the
* number of bytes exceeds the set limit, the packets will be replaced
* with loss packets.
*
*
* IID_IHXTransportBufferLimit:
*
* {68B2AEF9-1384-46ec-A4D0-00680A7DBBB0}
*
*/
DEFINE_GUID(IID_IHXTransportBufferLimit, 0x68b2aef9, 0x1384, 0x46ec, 0xa4,
0xd0, 0x0, 0x68, 0xa, 0x7d, 0xbb, 0xb0);
#undef INTERFACE
#define INTERFACE IHXTransportBufferLimit
DECLARE_INTERFACE_(IHXTransportBufferLimit, IUnknown)
{
/*
* IUnknown methods
*/
STDMETHOD(QueryInterface) (THIS_
REFIID riid,
void** ppvObj) PURE;
STDMETHOD_(ULONG32,AddRef) (THIS) PURE;
STDMETHOD_(ULONG32,Release) (THIS) PURE;
/*
* IHXTransportBufferLimit methods
*/
/************************************************************************
* Method:
* IHXTransportBufferLimit::SetByteLimit
* Purpose:
* Sets the maximum number of bytes that can be buffered in the
* transport buffer. If incomming packets would put us over this
* limit, then they are replaced with lost packets. A byte limit
* of 0 means unlimited buffering.
*/
STDMETHOD(SetByteLimit) (THIS_ UINT16 uStreamNumber,
UINT32 uByteLimit) PURE;
/************************************************************************
* Method:
* IHXTransportBufferLimit::GetByteLimit
* Purpose:
* Returns the current byte limit in effect. A value of 0 means
* unlimited buffering is allowed
*/
STDMETHOD_(UINT32,GetByteLimit) (THIS_ UINT16 uStreamNumber) PURE;
};
#endif /* HXBUFCTL_H */
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