Retired Document
Important: This sample code may not represent best practices for current development. The project may use deprecated symbols and illustrate technologies and techniques that are no longer recommended.
PCMBlitterLib.h
/* Copyright © 2007 Apple Inc. All Rights Reserved. |
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"Apple Software"), to use, reproduce, modify and redistribute the Apple |
Software, with or without modifications, in source and/or binary forms; |
provided that if you redistribute the Apple Software in its entirety and |
without modifications, you must retain this notice and the following |
text and disclaimers in all such redistributions of the Apple Software. |
Neither the name, trademarks, service marks or logos of Apple Inc. |
may be used to endorse or promote products derived from the Apple |
Software without specific prior written permission from Apple. Except |
as expressly stated in this notice, no other rights or licenses, express |
or implied, are granted by Apple herein, including but not limited to |
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*/ |
#ifndef __PCMBlitterLib_h__ |
#define __PCMBlitterLib_h__ |
#ifdef __cplusplus |
extern "C" { |
#endif |
#if !KERNEL |
#include <CoreAudio/CoreAudioTypes.h> |
#else |
#include <TargetConditionals.h> |
#include <libkern/OSBase.h> |
#include <libkern/OSTypes.h> |
#include <libkern/OSByteOrder.h> |
typedef float Float32; |
typedef double Float64; |
#endif |
void NativeInt16ToFloat32_X86( const SInt16 *src, Float32 *dst, unsigned int numToConvert ); |
void SwapInt16ToFloat32_X86( const SInt16 *src, Float32 *dst, unsigned int numToConvert ); |
void NativeInt24ToFloat32_X86( const UInt8 *src, Float32 *dst, unsigned int numToConvert ); |
void SwapInt24ToFloat32_X86( const UInt8 *src, Float32 *dst, unsigned int numToConvert ); |
void NativeInt32ToFloat32_X86( const SInt32 *src, Float32 *dst, unsigned int numToConvert ); |
void SwapInt32ToFloat32_X86( const SInt32 *src, Float32 *dst, unsigned int numToConvert ); |
void Float32ToNativeInt16_X86( const Float32 *src, SInt16 *dst, unsigned int numToConvert ); |
void Float32ToSwapInt16_X86( const Float32 *src, SInt16 *dst, unsigned int numToConvert ); |
void Float32ToNativeInt32_X86( const Float32 *src, SInt32 *dst, unsigned int numToConvert ); |
void Float32ToSwapInt32_X86( const Float32 *src, SInt32 *dst, unsigned int numToConvert ); |
void Float32ToNativeInt24_X86( const Float32 *src, UInt8 *dst, unsigned int numToConvert ); |
void Float32ToSwapInt24_X86( const Float32 *src, UInt8 *dst, unsigned int numToConvert ); |
#define NativeInt16ToFloat32 NativeInt16ToFloat32_X86 |
#define SwapInt16ToFloat32 SwapInt16ToFloat32_X86 |
#define NativeInt24ToFloat32 NativeInt24ToFloat32_X86 |
#define SwapInt24ToFloat32 SwapInt24ToFloat32_X86 |
#define NativeInt32ToFloat32 NativeInt32ToFloat32_X86 |
#define SwapInt32ToFloat32 SwapInt32ToFloat32_X86 |
#define Float32ToNativeInt16 Float32ToNativeInt16_X86 |
#define Float32ToSwapInt16 Float32ToSwapInt16_X86 |
#define Float32ToNativeInt32 Float32ToNativeInt32_X86 |
#define Float32ToSwapInt32 Float32ToSwapInt32_X86 |
#define Float32ToNativeInt24 Float32ToNativeInt24_X86 |
#define Float32ToSwapInt24 Float32ToSwapInt24_X86 |
void Float32ToUInt8(const Float32 *src, UInt8 *dest, unsigned int count); |
void Float32ToSInt8(const Float32 *src, SInt8 *dest, unsigned int count); |
void UInt8ToFloat32(const UInt8 *src, Float32 *dest, unsigned int count); |
void SInt8ToFloat32(const UInt8 *src, Float32 *dest, unsigned int count); |
// ____________________________________________________________ |
// FloatToInt |
// N.B. Functions which use this should invoke SET_ROUNDMODE / RESTORE_ROUNDMODE. |
static inline SInt32 FloatToInt(double inf, double min32, double max32) |
{ |
if (inf >= max32) return 0x7FFFFFFF; |
return (SInt32)inf; // x86 saturates low by itself |
} |
#ifdef __cplusplus |
} |
#endif |
#endif |
Copyright © 2009 Apple Inc. All Rights Reserved. Terms of Use | Privacy Policy | Updated: 2009-04-21