AAX_CChunkDataParser Class Reference

#include <AAX_CChunkDataParser.h>

Collaboration diagram for AAX_CChunkDataParser:

Description

Parser utility for plugin chunks.

Todo:

Update this documentation for AAX

This class acts as generic repository for data that is stuffed into or extracted from a SFicPlugInChunk. It has an abstracted Add/Find interface to add or retrieve data values, each uniquely referenced by a c-string. In conjuction with the Effect Layer and the "ControlManager" aspects of the CProcess class, this provides a more transparent & resilent system for performing save-and-restore on settings that won't break so easily from endian issues or from the hard-coded structs that have typically been used to build chunk data.

Format of the Chunk Data

The first 4 bytes of the data are the version number (repeated 4 times to be immune to byte swapping). Data follows next.

Example: "f_bypa %$#@d_gain #$!#@$%$s_omsi #$"

type    name    value   
----------------------------
float   bypa    %$#@    
double  gain    #$!#@$%$
int16_t omsi    #$

• The first character denotes the data type:

  'f' = float
  'd' = double
  'l' = int32
  's' = int16

  
  
• "_" is an empty placekeeper that could be used to addition future information. Currently, it's ignored when a chunk is parsed.

• The string name identifier follows next, and can up to 255 characters int32_t. The Effect Layer builds chunks it always converts the AAX_FourCharCode of the control to a string. So, this will always be 4 characters int32_t. The string is null terminated to indicate the start of the data value.

• The data value follows next, but is possible shifted to aligned word aligned. The size of is determined, of course, by the data type.

Classes
struct	DataValue

Public Member Functions
	AAX_CChunkDataParser ()
virtual	~AAX_CChunkDataParser ()
void	AddFloat (const char *name, float value)
	CALL: Adds some data of type float with name and value to the current chunk.
void	AddDouble (const char *name, double value)
	CALL: See AddFloat()
void	AddInt32 (const char *name, int32_t value)
	CALL: See AddFloat()
void	AddInt16 (const char *name, int16_t value)
	CALL: See AddFloat()
void	AddString (const char *name, AAX_CString value)
bool	FindFloat (const char *name, float *value)
	CALL: Finds some data of type float with name and value in the current chunk.
bool	FindDouble (const char *name, double *value)
	CALL: See FindFloat()
bool	FindInt32 (const char *name, int32_t *value)
	CALL: See FindFloat()
bool	FindInt16 (const char *name, int16_t *value)
	CALL: See FindFloat()
bool	FindString (const char *name, AAX_CString *value)
bool	ReplaceDouble (const char *name, double value)
int32_t	GetChunkData (AAX_SPlugInChunk *chunk)
	CALL: Fills passed in chunk with data from current chunk; returns 0 if successful.
int32_t	GetChunkDataSize ()
	CALL: Returns size of current chunk.
int32_t	GetChunkVersion ()
	CALL: Lists fVersion in chunk header for convenience.
bool	IsEmpty ()
	CALL: Returns true if no data is in the chunk.
void	Clear ()
	Resets chunk.

Internal Methods
An Effect Layer plugin can ignore these methods. They are handled by or used internally by the Effect Layer.
int32_t	mLastFoundIndex
	The last index found in the chunk.
char *	mChunkData
int32_t	mChunkVersion
	Equal to fVersion from the chunk header. Equal to -1 if no chunk is loaded.
std::vector< DataValue >	mDataValues
void	LoadChunk (const AAX_SPlugInChunk *chunk)
	Sets current chunk to data in chunk parameter.
void	WordAlign (uint32_t &index)
	sets index to 4-byte boundary
void	WordAlign (int32_t &index)
	sets index to 4-byte boundary
int32_t	FindName (const AAX_CString &Name)
	used by public Find methods

Constructor & Destructor Documentation

AAX_CChunkDataParser()

AAX_CChunkDataParser::AAX_CChunkDataParser

(

)

~AAX_CChunkDataParser()

virtual AAX_CChunkDataParser::~AAX_CChunkDataParser ( )

virtual

Member Function Documentation

AddFloat()

void AAX_CChunkDataParser::AddFloat	(	const char *	name,
		float	value
	)

CALL: Adds some data of type float with name and value to the current chunk.

See also

AddDouble(), AddInt32(), and AddInt16() are the same but with different data types.

AddDouble()

void AAX_CChunkDataParser::AddDouble	(	const char *	name,
		double	value
	)

CALL: See AddFloat()

AddInt32()

void AAX_CChunkDataParser::AddInt32	(	const char *	name,
		int32_t	value
	)

CALL: See AddFloat()

AddInt16()

void AAX_CChunkDataParser::AddInt16	(	const char *	name,
		int16_t	value
	)

CALL: See AddFloat()

AddString()

void AAX_CChunkDataParser::AddString	(	const char *	name,
		AAX_CString	value
	)

FindFloat()

bool AAX_CChunkDataParser::FindFloat	(	const char *	name,
		float *	value
	)

CALL: Finds some data of type float with name and value in the current chunk.

See also

FindDouble(), FindInt32(), and FindInt16() are the same but with different data types.

FindDouble()

bool AAX_CChunkDataParser::FindDouble	(	const char *	name,
		double *	value
	)

CALL: See FindFloat()

FindInt32()

bool AAX_CChunkDataParser::FindInt32	(	const char *	name,
		int32_t *	value
	)

CALL: See FindFloat()

FindInt16()

bool AAX_CChunkDataParser::FindInt16	(	const char *	name,
		int16_t *	value
	)

CALL: See FindFloat()

FindString()

bool AAX_CChunkDataParser::FindString	(	const char *	name,
		AAX_CString *	value
	)

ReplaceDouble()

bool AAX_CChunkDataParser::ReplaceDouble	(	const char *	name,
		double	value
	)

GetChunkData()

int32_t AAX_CChunkDataParser::GetChunkData

(

AAX_SPlugInChunk *

chunk

)

CALL: Fills passed in chunk with data from current chunk; returns 0 if successful.

GetChunkDataSize()

int32_t AAX_CChunkDataParser::GetChunkDataSize

(

)

CALL: Returns size of current chunk.

GetChunkVersion()

int32_t AAX_CChunkDataParser::GetChunkVersion ( )

inline

CALL: Lists fVersion in chunk header for convenience.

References mChunkVersion.

IsEmpty()

bool AAX_CChunkDataParser::IsEmpty

(

)

CALL: Returns true if no data is in the chunk.

Clear()

void AAX_CChunkDataParser::Clear

(

)

Resets chunk.

LoadChunk()

void AAX_CChunkDataParser::LoadChunk

(

const AAX_SPlugInChunk *

chunk

)

Sets current chunk to data in chunk parameter.

WordAlign() [1/2]

void AAX_CChunkDataParser::WordAlign ( uint32_t &  index )

protected

sets index to 4-byte boundary

WordAlign() [2/2]

void AAX_CChunkDataParser::WordAlign ( int32_t &  index )

protected

sets index to 4-byte boundary

FindName()

int32_t AAX_CChunkDataParser::FindName ( const AAX_CString &  Name )

protected

used by public Find methods

Member Data Documentation

mLastFoundIndex

int32_t AAX_CChunkDataParser::mLastFoundIndex

protected

The last index found in the chunk.

Since control values in chunks should tend to stay in order and in sync with the way they're checked with controls within the plug-in, we'll keep track of the value index to speed up searching.

mChunkData

char* AAX_CChunkDataParser::mChunkData

protected

mChunkVersion

int32_t AAX_CChunkDataParser::mChunkVersion

protected

Equal to fVersion from the chunk header. Equal to -1 if no chunk is loaded.

Referenced by GetChunkVersion().

mDataValues

std::vector<DataValue> AAX_CChunkDataParser::mDataValues

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The documentation for this class was generated from the following file:

• AAX_CChunkDataParser.h