logImageCore.h

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/*
 *       Cineon image file format library definitions.
 *       Cineon and DPX common structures.
 *
 *       This header file contains private details.
 *       User code should generally use cineonlib.h and dpxlib.h only.
 *       Hmm. I thought the two formats would have more in common!
 *
 *       Copyright 1999,2000,2001 David Hodson <hodsond@acm.org>
 *
 *       This program is free software; you can redistribute it and/or modify it
 *       under the terms of the GNU General Public License as published by the Free
 *       Software Foundation; either version 2 of the License, or (at your option)
 *       any later version.
 *
 *       This program is distributed in the hope that it will be useful, but
 *       WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 *       or FITNESS FOR A PARTICULAR PURPOSE.    See the GNU General Public License
 *       for more details.
 *
 *       You should have received a copy of the GNU General Public License
 *       along with this program; if not, write to the Free Software
 *       Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 */

#ifndef _LOG_IMAGE_CORE_H_
#define _LOG_IMAGE_CORE_H_

#include <stdio.h>
#include "logImageLib.h"

#ifdef __cplusplus
extern "C" {
#endif

#include "BLO_sys_types.h" // for intptr_t support
#undef ntohl
#undef htonl
typedef int (GetRowFn)(LogImageFile* logImage, unsigned short* row, int lineNum);
typedef int (SetRowFn)(LogImageFile* logImage, const unsigned short* row, int lineNum);
typedef void (CloseFn)(LogImageFile* logImage);

struct _Log_Image_File_t_
{
        /* specified in header */
        int width;
        int height;
        int depth;
        int bitsPerPixel;
        int imageOffset;

        /* file buffer, measured in longwords (4 byte) */
        int lineBufferLength;
        unsigned int* lineBuffer;

        /* pixel buffer, holds 10 bit pixel values */
        unsigned short* pixelBuffer;
        int pixelBufferUsed;

        /* io stuff */
        FILE* file;
        int reading;
        int fileYPos;

        /* byte conversion stuff */
        LogImageByteConversionParameters params;
#if 0
        float gamma;
        int blackPoint;
        int whitePoint;
#endif
        unsigned char lut10[1024];
        unsigned short lut8[256];

        unsigned short lut10_16[1024];
        unsigned short lut16_16[65536];

        /* pixel access functions */
        GetRowFn* getRow;
        SetRowFn* setRow;
        CloseFn* close;
        
        unsigned char *membuffer;
        uintptr_t membuffersize;
        unsigned char *memcursor;
};

void setupLut(LogImageFile*);
void setupLut16(LogImageFile*);

int pixelsToLongs(int numPixels);

/* typedefs used in original docs */
/* note size assumptions! */

typedef unsigned int U32;
typedef unsigned short U16;
typedef unsigned char U8;
typedef signed int S32;
typedef float R32;
typedef char ASCII;

R32 htonf(R32 f);
R32 ntohf(R32 f);
R32 undefined(void);
U16 reverseU16(U16 value);
U32 reverseU32(U32 value);
R32 reverseR32(R32 value);

#ifdef __cplusplus
}
#endif

#endif /* _LOG_IMAGE_CORE_H_ */