IJL编解码库

/*M* // // // INTEL CORPORATION PROPRIETARY INFORMATION // This software is supplied under the terms of a license agreement or // nondisclosure agreement with Intel Corporation and may not be copied // or disclosed except in accordance with the terms of that agreement. // Copyright (c) 1998 Intel Corporation. All Rights Reserved. // // // File: // ijl.h // // Purpose: // IJL Common Header File // This file contains: definitions for data types, data // structures, error codes, and function prototypes used // in the Intel(R) JPEG Library (IJL). // // Version: // 1.51 // *M*/ #ifndef __IJL_H__ #define __IJL_H__ #if defined( __cplusplus ) extern "C" { #endif #ifndef IJL_ALL_WARNINGS #if defined (_WIN32) #if _MSC_VER >= 1000 /* nonstandard extension used : nameless struct/union */ #pragma warning(disable : 4201) /* nonstandard extension used : bit field types other than int */ #pragma warning(disable : 4214) /* unreferenced inline function has been removed */ #pragma warning(disable : 4514) /* named type definition in parentheses */ #pragma warning(disable : 4115) #endif /* _MSC_VER >= 1000 */ #endif /* _WIN32 */ #endif /* IJL_ALL_WARNINGS */ #if defined (_WIN32) #define IJL_STDCALL __stdcall #else #define IJL_STDCALL #endif /* align struct on 8 bytes boundary */ #if defined (_WIN32) #pragma pack (8) #else #endif /* ///////////////////////////////////////////////////////////////////////// // Macros/Constants */ /* Size of file I/O buffer (4K). */ #define JBUFSIZE 4096 #if defined (_WIN32) #define IJL_INT64 __int64 #else #define IJL_INT64 long long #endif #define IJL_UINT64 unsigned IJL_INT64 #ifndef IJLAPI #ifdef IJL_MSEXPORTS #define IJLAPI(type,name,arg) \ extern __declspec(dllimport) type IJL_STDCALL name arg #else #define IJLAPI(type,name,arg) \ extern type IJL_STDCALL name arg #endif #endif #define IJL_DIB_ALIGN (sizeof(int) - 1) #define IJL_DIB_UWIDTH(width,nchannels) \ ((width) * (nchannels)) #define IJL_DIB_AWIDTH(width,nchannels) \ ( ((IJL_DIB_UWIDTH(width,nchannels) + IJL_DIB_ALIGN) & (~IJL_DIB_ALIGN)) ) #define IJL_DIB_PAD_BYTES(width,nchannels) \ ( IJL_DIB_AWIDTH(width,nchannels) - IJL_DIB_UWIDTH(width,nchannels) ) #define IJL_DIB_SCALE_SIZE(jpgsize,scale) \ ( ((jpgsize) + (scale) - 1) / (scale) ) /*D* //////////////////////////////////////////////////////////////////////////// // Name: IJLibVersion // // Purpose: Stores library version info. // // Context: // // Example: // major - 1 // minor - 0 // build - 1 // Name - "ijl10.dll" // Version - "1.0.1 Beta1" // InternalVersion - "1.0.1.1" // BuildDate - "Sep 22 1998" // CallConv - "DLL" // //////////////////////////////////////////////////////////////////////////// *D*/ typedef struct _IJLibVersion { int major; int minor; int build; const char* Name; const char* Version; const char* InternalVersion; const char* BuildDate; const char* CallConv; } IJLibVersion; /*D* //////////////////////////////////////////////////////////////////////////// // Name: IJL_RECT // // Purpose: Keep coordinates for rectangle region of image // // Context: Used to specify roi // // Fields: // //////////////////////////////////////////////////////////////////////////// *D*/ typedef struct _IJL_RECT { long left; long top; long right; long bottom; } IJL_RECT; /*D* //////////////////////////////////////////////////////////////////////////// // Name: IJL_HANDLE // // Purpose: file handle // // Context: used internally // // Fields: // //////////////////////////////////////////////////////////////////////////// *D*/ typedef void* IJL_HANDLE; /*D* //////////////////////////////////////////////////////////////////////////// // Name: IJLIOTYPE // // Purpose: Possible types of data read/write/other operations to be // performed by the functions IJL_Read and IJL_Write. // // See the Developer's Guide for details on appropriate usage. // // Fields: // // IJL_JFILE_XXXXXXX Indicates JPEG data in a stdio file. // // IJL_JBUFF_XXXXXXX Indicates JPEG data in an addressable buffer. // //////////////////////////////////////////////////////////////////////////// *D*/ typedef enum _IJLIOTYPE { IJL_SETUP = -1, /* Read JPEG parameters (i.e., height, width, channels, sampling, etc.) */ /* from a JPEG bit stream. */ IJL_JFILE_READPARAMS = 0, IJL_JBUFF_READPARAMS = 1, /* Read a JPEG Interchange Format image. */ IJL_JFILE_READWHOLEIMAGE = 2, IJL_JBUFF_READWHOLEIMAGE = 3, /* Read JPEG tables from a JPEG Abbreviated Format bit stream. */ IJL_JFILE_READHEADER = 4, IJL_JBUFF_READHEADER = 5, /* Read image info from a JPEG Abbreviated Format bit stream. */ IJL_JFILE_READENTROPY = 6, IJL_JBUFF_READENTROPY = 7, /* Write an entire JFIF bit stream. */ IJL_JFILE_WRITEWHOLEIMAGE = 8, IJL_JBUFF_WRITEWHOLEIMAGE = 9, /* Write a JPEG Abbreviated Format bit stream. */ IJL_JFILE_WRITEHEADER = 10, IJL_JBUFF_WRITEHEADER = 11, /* Write image info to a JPEG Abbreviated Format bit stream. */ IJL_JFILE_WRITEENTROPY = 12, IJL_JBUFF_WRITEENTROPY = 13, /* Scaled Decoding Options: */ /* Reads a JPEG image scaled to 1/2 size. */ IJL_JFILE_READONEHALF = 14, IJL_JBUFF_READONEHALF = 15, /* Reads a JPEG image scaled to 1/4 size. */ IJL_JFILE_READONEQUARTER = 16, IJL_JBUFF_READONEQUARTER = 17, /* Reads a JPEG image scaled to 1/8 size. */ IJL_JFILE_READONEEIGHTH = 18, IJL_JBUFF_READONEEIGHTH = 19, /* Reads an embedded thumbnail from a JFIF bit stream. */ IJL_JFILE_READTHUMBNAIL = 20, IJL_JBUFF_READTHUMBNAIL = 21 } IJLIOTYPE; /*D* //////////////////////////////////////////////////////////////////////////// // Name: IJL_COLOR // // Purpose: Possible color space formats. // // Note these formats do *not* necessarily denote // the number of channels in the color space. // There exists separate "channel" fields in the // JPEG_CORE_PROPERTIES data structure specifically // for indicating the number of channels in the // JPEG and/or DIB color spaces. // // See the Developer's Guide for details on appropriate usage. // //////////////////////////////////////////////////////////////////////////// *D*/ typedef enum _IJL_COLOR { IJL_RGB = 1, /* Red-Green-Blue color space. */ IJL_BGR = 2, /* Reversed channel ordering from IJL_RGB. */ IJL_YCBCR = 3, /* Luminance-Chrominance color space as defined */ /* by CCIR Recommendation 601. */ IJL_G = 4, /* Grayscale color space. */ IJL_RGBA_FPX = 5, /* FlashPix RGB 4 channel color space that */ /* has pre-multiplied opacity. */ IJL_YCBCRA_FPX = 6, /* FlashPix YCbCr 4 channel color space that */ /* has pre-multiplied opacity. */ IJL_OTHER = 255 /* Some other color space not defined by the IJL. */ /* (This means no color space conversion will */ /* be done by the IJL.) */ } IJL_COLOR; /*D* //////////////////////////////////////////////////////////////////////////// // Name: IJL_JPGSUBSAMPLING // // Purpose: Possible subsampling formats used