convert.h File Reference

Declares and implements function used for converting between the mixer and codec formats. More...

#include <boost/function.hpp>
#include "ctnumlimits.h"
#include "misc.h"

Go to the source code of this file.

Classes
struct	detail::IfThenElse< true, TrueType, FalseType >
struct	detail::IfThenElse< false, TrueType, FalseType >
struct	detail::ScaleFactor< Source, Dest >
struct	detail::ScaleFactor< Source, Source >
Namespaces
namespace	detail
namespace	detail::SSE
Defines
#define	CONVERT_PREAMBLE()
#define	CONVERT_RETURN()   return static_cast<DWORD>(reinterpret_cast<BYTE*>(pDstSamples) - static_cast<BYTE*>(pDstArray));
Typedefs
typedef boost::function< DWORD(LPCVOID, DWORD, PVOID)>	ConverterFnPtr
Functions
template<class SourceSampleType , class DestSampleType >
DWORD	detail::ConvertChannelEqual (LPCVOID pSrcArray, DWORD numFrames, PVOID pDstArray, WORD srcChannels, WORD)
template<class DestSampleType >
DWORD	detail::ConvertChannelEqual (LPCVOID pSrcArray, DWORD numFrames, PVOID pDstArray, WORD srcChannels)
FORCEINLINE void	detail::SSE::StoreConvertedSamples (short *pDstSamples, const __m128 &samples)
FORCEINLINE void	detail::SSE::StoreConvertedSamples (long *pDstSamples, const __m128 &samples)
FORCEINLINE void	detail::SSE::StoreConvertedSamples (short *&pDstSamples, __m128 samples[4])
FORCEINLINE void	detail::SSE::StoreConvertedSamples (long *&pDstSamples, __m128 samples[4])
FORCEINLINE __m128i	detail::SSE::LongShortToShorts (__m128 &samples)
FORCEINLINE void	detail::SSE::Get16ConvertedSamples (const float *&pSrcSamples, __m128 samplePacks[4], const __m128 &scaleFactors)
template<class DestSampleType >
void	detail::SSE::Convert16SamplesLoop (const float *&pSrcSamples, DestSampleType *&pDstSamples, DWORD numPacks, const __m128 &scaleFactors)
template<class DestSampleType >
DWORD	detail::ConvertChannelEqualSSE (LPCVOID pSrcArray, DWORD numFrames, PVOID pDstArray, WORD srcChannels)
template<class SourceSampleType , class DestSampleType >
DWORD	detail::ConvertChannelDown (LPCVOID pSrcArray, DWORD numFrames, PVOID pDstArray, WORD srcChannels, WORD dstChannels)
template<class SourceSampleType , class DestSampleType >
DWORD	detail::ConvertChannelUp (LPCVOID pSrcArray, DWORD numFrames, PVOID pDstArray, WORD srcChannels, WORD dstChannels)
DWORD	detail::ConvertCopy (LPCVOID pSrcArray, DWORD numFrames, PVOID pDstArray, WORD sampleSize, WORD numChannels)
void	DetermineSampleConverter (const tWAVEFORMATEX &inp, const tWAVEFORMATEX &out, ConverterFnPtr &converter)

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Detailed Description

Declares and implements function used for converting between the mixer and codec formats.

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Define Documentation

#define CONVERT_PREAMBLE

(

)

Value:

const SourceSampleType* pSrcSamples = static_cast<const SourceSampleType*>(pSrcArray); \
                DestSampleType* pDstSamples = static_cast<DestSampleType*>(pDstArray); \
                typedef ScaleFactor<SourceSampleType, DestSampleType> ScaleFactorType; \
                const typename ScaleFactorType::ScaleType scaleFactor = ScaleFactorType::value;

Defines the common declaration used by the conversion functions including appropriately casted soucre and destination sample pointers and the caching of the scale value in a local variable

#define CONVERT_RETURN

(

)

return static_cast<DWORD>(reinterpret_cast<BYTE*>(pDstSamples) - static_cast<BYTE*>(pDstArray));

Evaluates the number of bytes written to the destination array by subtracting the iterating pointer from the base dest pointer and returning it

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Typedef Documentation

typedef boost::function<DWORD (LPCVOID, DWORD, PVOID)> ConverterFnPtr

Function object type for the sample conversion function

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Function Documentation

void DetermineSampleConverter	(	const tWAVEFORMATEX &	inp,
		const tWAVEFORMATEX &	out,
		ConverterFnPtr &	converter
	)

Determines the correct function that'll convert between the sample types

Picks a suitable function and template parameters that'll change samples from the input wave format to the output wave format.

Parameters:

	inp	The input wave format, that from the audio mixing device
	out	The output wave format, that to feed to the codec
[out]	converter	On output, the function object that'll call the actual Convert* function when called