logImageLib.c

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/*
 *   Cineon and DPX image file format library routines.
 *
 *   Copyright 1999 - 2002 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.
 *
 */

#include "cineonlib.h"
#include "dpxlib.h"

#include <stdio.h>
#include <math.h>
#include <stdlib.h>
#include <time.h>                /* strftime() */
#include <sys/types.h>
#ifdef WIN32
#include <winsock.h>
#else
#include <netinet/in.h>  /* htonl() */
#endif
#include <string.h>          /* memset */

#define MIN_GAMMA 0.01
#define MAX_GAMMA 99.9
#define DEFAULT_GAMMA 1.0
#define DEFAULT_BLACK_POINT 95
#define DEFAULT_WHITE_POINT 685

void
logImageSetVerbose(int verbosity) {
    cineonSetVerbose(verbosity);
    dpxSetVerbose(verbosity);
}

LogImageFile*
logImageOpen(const char* filename, int cineon) {
    if (cineon) {
        return cineonOpen(filename);
    } else {
        return dpxOpen(filename);
    }
    return 0;
}

LogImageFile*
logImageOpenFromMem(unsigned char *buffer, unsigned int size, int cineon) {
    if (cineon) {
        return cineonOpenFromMem(buffer, size);
    } else {
        return dpxOpenFromMem(buffer, size);
    }
    return 0;
}

LogImageFile*
logImageCreate(const char* filename, int cineon, int width, int height, int depth) {
    if (cineon) {
        return cineonCreate(filename, width, height, depth);
    } else {
        return dpxCreate(filename, width, height, depth);
    }
    return 0;
}

int
logImageGetSize(const LogImageFile* logImage, int* width, int* height, int* depth) {
    *width = logImage->width;
    *height = logImage->height;
    *depth = logImage->depth;
    return 0;
}

int
logImageGetByteConversionDefaults(LogImageByteConversionParameters* params) {
    params->gamma = DEFAULT_GAMMA;
    params->blackPoint = DEFAULT_BLACK_POINT;
    params->whitePoint = DEFAULT_WHITE_POINT;
    params->doLogarithm = 0;
    return 0;
}

int
logImageGetByteConversion(const LogImageFile* logImage, LogImageByteConversionParameters* params) {
    params->gamma = logImage->params.gamma;
    params->blackPoint = logImage->params.blackPoint;
    params->whitePoint = logImage->params.whitePoint;
    params->doLogarithm = 0;
    return 0;
}

int
logImageSetByteConversion(LogImageFile* logImage, const LogImageByteConversionParameters* params) {
    if ((params->gamma >= MIN_GAMMA) &&
            (params->gamma <= MAX_GAMMA) &&
            (params->blackPoint >= 0) &&
            (params->blackPoint < params->whitePoint) &&
            (params->whitePoint <= 1023)) {
        logImage->params.gamma = params->gamma;
        logImage->params.blackPoint = params->blackPoint;
        logImage->params.whitePoint = params->whitePoint;
        logImage->params.doLogarithm = params->doLogarithm;
        setupLut16(logImage);
        return 0;
    }
    return 1;
}

int
logImageGetRowBytes(LogImageFile* logImage, unsigned short* row, int y) {
    return logImage->getRow(logImage, row, y);
}

int
logImageSetRowBytes(LogImageFile* logImage, const unsigned short* row, int y) {
    return logImage->setRow(logImage, row, y);
}

void
logImageClose(LogImageFile* logImage) {
    logImage->close(logImage);
}

void
logImageDump(const char* filename) {

    U32 magic;

    FILE* foo = fopen(filename, "rb");
    if (foo == 0) {
        return;
    }

    if (fread(&magic, sizeof(magic), 1, foo) == 0) {
        fclose(foo);
        return;
    }

    fclose(foo);

    if (magic == ntohl(CINEON_FILE_MAGIC)) {
#if 0
        cineonDump(filename);
#endif
    } else if (magic == ntohl(DPX_FILE_MAGIC)) {
        dpxDump(filename);
    }
}