winamp/Src/vlb/programcfg.h

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2024-09-24 12:54:57 +00:00
/* $Header: /cvs/root/winamp/vlb/programcfg.h,v 1.1 2009/04/28 20:21:10 audiodsp Exp $ */
/***************************************************************************\
*
* Copyright 2000-2002 Dolby Laboratories, Inc. All Rights
* Reserved. Do not copy. Do not distribute.
* Confidential information.
*
* (C) copyright Fraunhofer - IIS (1998)
* All Rights Reserved
*
* filename: programcfg.h
* project : MPEG-2 AAC Decoder
* contents/description: program config element
*
\***************************************************************************/
#ifndef __PROGRAMCFG_H__
#define __PROGRAMCFG_H__
#include "bitsequence.h"
class CDolbyBitStream ;
/** PCE Program Configuration Element.
This class holds the program configuration data read from the bitstream
and maps the decoded channels according to the currently active program.
*/
class CProgramConfig
{
enum
{
FrontRow = 0,
SideRow = 1,
BackRow = 2,
SpeakerRows = 3,
MaximumChannels = 16,
MaximumCommentLength = 64
} ;
CVLBBitSequence m_ElementInstanceTag;
CVLBBitSequence m_Profile ;
CVLBBitSequence m_SamplingFrequencyIndex ;
CVLBBitSequence m_NumLfeChannelElements ;
CVLBBitSequence m_NumAssocDataElements ;
CVLBBitSequence m_NumValidCcElements ;
CVLBBitSequence m_MonoMixdownPresent ;
CVLBBitSequence m_MonoMixdownElementNumber ;
CVLBBitSequence m_StereoMixdownPresent ;
CVLBBitSequence m_StereoMixdownElementNumber ;
CVLBBitSequence m_MatrixMixdownIndexPresent ;
CVLBBitSequence m_MatrixMixdownIndex ;
CVLBBitSequence m_PseudoSurroundEnable ;
CVLBBitSequence m_NumberOfChannelElements [SpeakerRows] ;
CVLBBitSequence m_ChannelElementIsCpe [SpeakerRows][MaximumChannels] ;
CVLBBitSequence m_ChannelElementTagSelect [SpeakerRows][MaximumChannels] ;
CVLBBitSequence m_LfeElementTagSelect [MaximumChannels] ;
CVLBBitSequence m_AssocDataElementTagSelect [MaximumChannels] ;
CVLBBitSequence m_CcElementIsIndSw [MaximumChannels] ;
CVLBBitSequence m_ValidCcElementTagSelect [MaximumChannels] ;
CVLBBitSequence m_CommentFieldBytes ;
char m_Comment [MaximumCommentLength] ;
unsigned int m_NumChannels;
public :
CProgramConfig () ;
~CProgramConfig () ;
void ResetNonMCConfig(void);
void Read (CDolbyBitStream &bs) ;
//
bool AddChannel (const int tag, const bool isCPE) ;
//
bool AddSingleChannel (const int tag) ;
bool AddChannelPair (const int tag) ;
bool AddCouplingChannel (const int tag) ;
bool AddLowFrequencyChannel (const int tag) ;
// explicit query
bool IsFrontChannel (const int tag) { return IsChannelLocatedAt (FrontRow, tag) ; }
bool IsFrontChannelPair (const int tag) { return IsChannelPairLocatedAt (FrontRow, tag) ; }
bool IsBackChannel (const int tag) { return IsChannelLocatedAt (BackRow, tag) ; }
bool IsBackChannelPair (const int tag) { return IsChannelPairLocatedAt (BackRow, tag) ; }
// query by index
int GetNumberOfElements (const int row) ;
int GetNumberOfChannels (const int row) ;
int GetElementTag (const int row, const int index) ;
bool IsChannelPair (const int row, const int index) ;
int GetNumberOfLowFrequencyChannels (void) ;
int GetLowFrequencyChannelTag (const int index) ;
//
bool HasSpeakerMapping (void) const
{
return m_ExplicitMapping ;
}
unsigned int GetElementInstnaceTag (void) const
{
return m_ElementInstanceTag ;
}
unsigned int GetProfile (void) const
{
return m_Profile ;
}
unsigned int GetSamplingFrequencyIndex (void) const
{
return m_SamplingFrequencyIndex ;
}
unsigned int GetNumChannels (void) const
{
return m_NumChannels ;
}
unsigned int GetNumFrontChannels (void) const
{
return m_NumberOfChannelElements[FrontRow] ;
}
unsigned int GetNumSideChannels (void) const
{
return m_NumberOfChannelElements[SideRow] ;
}
unsigned int GetNumBackChannels (void) const
{
return m_NumberOfChannelElements[BackRow] ;
}
unsigned int GetNumLfeChannels (void) const
{
return m_NumLfeChannelElements ;
}
unsigned int GetNumCouplingChannels (void) const
{
return m_NumValidCcElements ;
}
unsigned int GetCouplingChannelTag (int index) const
{
return m_ValidCcElementTagSelect[index] ;
}
unsigned int GetMonoMixdownPresent (void) const
{
return m_MonoMixdownPresent ;
}
unsigned int GetStereoMixdownPresent (void) const
{
return m_StereoMixdownPresent ;
}
unsigned int GetMatrixMixdownPresent (void) const
{
return m_MatrixMixdownIndexPresent ;
}
unsigned int GetPseudoSurroundPresent (void) const
{
return m_PseudoSurroundEnable ;
}
char* GetCommentFieldData (void);
protected :
bool IsChannelLocatedAt (const int row, const int tag) ;
bool IsChannelPairLocatedAt (const int row, const int tag) ;
// non-multichannel configuration
bool m_NonMC_ConfigSet ;
bool m_NonMC_IsCPE ;
int m_NonMC_Tag ;
//
bool m_ExplicitMapping ;
unsigned int m_NumberOfChannels [SpeakerRows] ;
} ;
#endif