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/* * Copyright (C)2011-2012, 2014-2015, 2017, 2019, 2021-2023 * D. R. Commander. All Rights Reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * * - Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * - Redistributions in binary form must reproduce the above copyright notice, * this list of conditions and the following disclaimer in the documentation * and/or other materials provided with the distribution. * - Neither the name of the libjpeg-turbo Project nor the names of its * contributors may be used to endorse or promote products derived from this * software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS", * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ /* * This program demonstrates how to compress, decompress, and transform JPEG * images using the TurboJPEG C API */ #ifdef _MSC_VER #define _CRT_SECURE_NO_DEPRECATE #endif #include <stdio.h> #include <stdlib.h> #include <string.h> #include <errno.h> #include <turbojpeg.h> #ifdef _WIN32 #define strcasecmp stricmp #define strncasecmp strnicmp #endif #define THROW(action, message) { \ printf("ERROR in line %d while %s:\n%s\n", __LINE__, action, message); \ retval = -1; goto bailout; \ } #define THROW_TJ(action) THROW(action, tjGetErrorStr2(tjInstance)) #define THROW_UNIX(action) THROW(action, strerror(errno)) #define DEFAULT_SUBSAMP TJSAMP_444 #define DEFAULT_QUALITY 95 const char *subsampName[TJ_NUMSAMP] = { "4:4:4", "4:2:2", "4:2:0", "Grayscale", "4:4:0", "4:1:1" }; const char *colorspaceName[TJ_NUMCS] = { "RGB", "YCbCr", "GRAY", "CMYK", "YCCK" }; tjscalingfactor *scalingFactors = NULL; int numScalingFactors = 0; /* DCT filter example. This produces a negative of the image. */ static int customFilter(short *coeffs, tjregion arrayRegion, tjregion planeRegion, int componentIndex, int transformIndex, tjtransform *transform) { int i; for (i = 0; i < arrayRegion.w * arrayRegion.h; i++) coeffs[i] = -coeffs[i]; return 0; } static void usage(char *programName) { int i; printf("\nUSAGE: %s <Input image> <Output image> [options]\n\n", programName); printf("Input and output images can be in Windows BMP or PBMPLUS (PPM/PGM) format. If\n"); printf("either filename ends in a .jpg extension, then the TurboJPEG API will be used\n"); printf("to compress or decompress the image.\n\n"); printf("Compression Options (used if the output image is a JPEG image)\n"); printf("--------------------------------------------------------------\n\n"); printf("-subsamp <444|422|420|gray> = Apply this level of chrominance subsampling when\n"); printf(" compressing the output image. The default is to use the same level of\n"); printf(" subsampling as in the input image, if the input image is also a JPEG\n"); printf(" image, or to use grayscale if the input image is a grayscale non-JPEG\n"); printf(" image, or to use %s subsampling otherwise.\n\n", subsampName[DEFAULT_SUBSAMP]); printf("-q <1-100> = Compress the output image with this JPEG quality level\n"); printf(" (default = %d).\n\n", DEFAULT_QUALITY); printf("Decompression Options (used if the input image is a JPEG image)\n"); printf("---------------------------------------------------------------\n\n"); printf("-scale M/N = Scale the input image by a factor of M/N when decompressing it.\n"); printf("(M/N = "); for (i = 0; i < numScalingFactors; i++) { printf("%d/%d", scalingFactors[i].num, scalingFactors[i].denom); if (numScalingFactors == 2 && i != numScalingFactors - 1) printf(" or "); else if (numScalingFactors > 2) { if (i != numScalingFactors - 1) printf(", "); if (i == numScalingFactors - 2) printf("or "); } } printf(")\n\n"); printf("-hflip, -vflip, -transpose, -transverse, -rot90, -rot180, -rot270 =\n"); printf(" Perform one of these lossless transform operations on the input image\n"); printf(" prior to decompressing it (these options are mutually exclusive.)\n\n"); printf("-grayscale = Perform lossless grayscale conversion on the input image prior\n"); printf(" to decompressing it (can be combined with the other transform operations\n"); printf(" above.)\n\n"); printf("-crop WxH+X+Y = Perform lossless cropping on the input image prior to\n"); printf(" decompressing it. X and Y specify the upper left corner of the cropping\n"); printf(" region, and W and H specify the width and height of the cropping region.\n"); printf(" X and Y must be evenly divible by the MCU block size (8x8 if the input\n"); printf(" image was compressed using no subsampling or grayscale, 16x8 if it was\n"); printf(" compressed using 4:2:2 subsampling, or 16x16 if it was compressed using\n"); printf(" 4:2:0 subsampling.)\n\n"); printf("General Options\n"); printf("---------------\n\n"); printf("-fastupsample = Use the fastest chrominance upsampling algorithm available\n\n"); printf("-fastdct = Use the fastest DCT/IDCT algorithm available\n\n"); printf("-accuratedct = Use the most accurate DCT/IDCT algorithm available\n\n"); exit(1); } int main(int argc, char **argv) { tjscalingfactor scalingFactor = { 1, 1 }; int outSubsamp = -1, outQual = -1; tjtransform xform; int flags = 0; int width, height; char *inFormat, *outFormat; FILE *jpegFile = NULL; unsigned char *imgBuf = NULL, *jpegBuf = NULL; int retval = 0, i, pixelFormat = TJPF_UNKNOWN; tjhandle tjInstance = NULL; if ((scalingFactors = tjGetScalingFactors(&numScalingFactors)) == NULL) THROW_TJ("getting scaling factors"); memset(&xform, 0, sizeof(tjtransform)); if (argc < 3) usage(argv[0]); /* Parse arguments. */ for (i = 3; i < argc; i++) { if (!strncasecmp(argv[i], "-sc", 3) && i < argc - 1) { int match = 0, temp1 = 0, temp2 = 0, j; if (sscanf(argv[++i], "%d/%d", &temp1, &temp2) < 2) usage(argv[0]); for (j = 0; j < numScalingFactors; j++) { if ((double)temp1 / (double)temp2 == (double)scalingFactors[j].num / (double)scalingFactors[j].denom) { scalingFactor = scalingFactors[j]; match = 1; break; } } if (match != 1) usage(argv[0]); } else if (!strncasecmp(argv[i], "-su", 3) && i < argc - 1) { i++; if (!strncasecmp(argv[i], "g", 1)) outSubsamp = TJSAMP_GRAY; else if (!strcasecmp(argv[i], "444")) outSubsamp = TJSAMP_444; else if (!strcasecmp(argv[i], "422")) outSubsamp = TJSAMP_422; else if (!strcasecmp(argv[i], "420")) outSubsamp = TJSAMP_420; else usage(argv[0]); } else if (!strncasecmp(argv[i], "-q", 2) && i < argc - 1) { outQual = atoi(argv[++i]); if (outQual < 1 || outQual > 100) usage(argv[0]); } else if (!strncasecmp(argv[i], "-g", 2)) xform.options |= TJXOPT_GRAY; else if (!strcasecmp(argv[i], "-hflip")) xform.op = TJXOP_HFLIP; else if (!strcasecmp(argv[i], "-vflip")) xform.op = TJXOP_VFLIP; else if (!strcasecmp(argv[i], "-transpose")) xform.op = TJXOP_TRANSPOSE; else if (!strcasecmp(argv[i], "-transverse")) xform.op = TJXOP_TRANSVERSE; else if (!strcasecmp(argv[i], "-rot90")) xform.op = TJXOP_ROT90; else if (!strcasecmp(argv[i], "-rot180")) xform.op = TJXOP_ROT180; else if (!strcasecmp(argv[i], "-rot270")) xform.op = TJXOP_ROT270; else if (!strcasecmp(argv[i], "-custom")) xform.customFilter = customFilter; else if (!strncasecmp(argv[i], "-c", 2) && i < argc - 1) { if (sscanf(argv[++i], "%dx%d+%d+%d", &xform.r.w, &xform.r.h, &xform.r.x, &xform.r.y) < 4 || xform.r.x < 0 || xform.r.y < 0 || xform.r.w < 1 || xform.r.h < 1) usage(argv[0]); xform.options |= TJXOPT_CROP; } else if (!strcasecmp(argv[i], "-fastupsample")) { printf("Using fast upsampling code\n"); flags |= TJFLAG_FASTUPSAMPLE; } else if (!strcasecmp(argv[i], "-fastdct")) { printf("Using fastest DCT/IDCT algorithm\n"); flags |= TJFLAG_FASTDCT; } else if (!strcasecmp(argv[i], "-accuratedct")) { printf("Using most accurate DCT/IDCT algorithm\n"); flags |= TJFLAG_ACCURATEDCT; } else usage(argv[0]); } /* Determine input and output image formats based on file extensions. */ inFormat = strrchr(argv[1], '.'); outFormat = strrchr(argv[2], '.'); if (inFormat == NULL || outFormat == NULL || strlen(inFormat) < 2 || strlen(outFormat) < 2) usage(argv[0]); inFormat = &inFormat[1]; outFormat = &outFormat[1]; if (!strcasecmp(inFormat, "jpg")) { /* Input image is a JPEG image. Decompress and/or transform it. */ long size; int inSubsamp, inColorspace; int doTransform = (xform.op != TJXOP_NONE || xform.options != 0 || xform.customFilter != NULL); unsigned long jpegSize; /* Read the JPEG file into memory. */ if ((jpegFile = fopen(argv[1], "rb")) == NULL) THROW_UNIX("opening input file"); if (fseek(jpegFile, 0, SEEK_END) < 0 || ((size = ftell(jpegFile)) < 0) || fseek(jpegFile, 0, SEEK_SET) < 0) THROW_UNIX("determining input file size"); if (size == 0) THROW("determining input file size", "Input file contains no data"); jpegSize = (unsigned long)size; if ((jpegBuf = (unsigned char *)tjAlloc(jpegSize)) == NULL) THROW_UNIX("allocating JPEG buffer"); if (fread(jpegBuf, jpegSize, 1, jpegFile) < 1) THROW_UNIX("reading input file"); fclose(jpegFile); jpegFile = NULL; if (doTransform) { /* Transform it. */ unsigned char *dstBuf = NULL; /* Dynamically allocate the JPEG buffer */ unsigned long dstSize = 0; if ((tjInstance = tjInitTransform()) == NULL) THROW_TJ("initializing transformer"); xform.options |= TJXOPT_TRIM; if (tjTransform(tjInstance, jpegBuf, jpegSize, 1, &dstBuf, &dstSize, &xform, flags) < 0) { tjFree(dstBuf); THROW_TJ("transforming input image"); } tjFree(jpegBuf); jpegBuf = dstBuf; jpegSize = dstSize; } else { if ((tjInstance = tjInitDecompress()) == NULL) THROW_TJ("initializing decompressor"); } if (tjDecompressHeader3(tjInstance, jpegBuf, jpegSize, &width, &height, &inSubsamp, &inColorspace) < 0) THROW_TJ("reading JPEG header"); printf("%s Image: %d x %d pixels, %s subsampling, %s colorspace\n", (doTransform ? "Transformed" : "Input"), width, height, subsampName[inSubsamp], colorspaceName[inColorspace]); if (!strcasecmp(outFormat, "jpg") && doTransform && scalingFactor.num == 1 && scalingFactor.denom == 1 && outSubsamp < 0 && outQual < 0) { /* Input image has been transformed, and no re-compression options have been selected. Write the transformed image to disk and exit. */ if ((jpegFile = fopen(argv[2], "wb")) == NULL) THROW_UNIX("opening output file"); if (fwrite(jpegBuf, jpegSize, 1, jpegFile) < 1) THROW_UNIX("writing output file"); fclose(jpegFile); jpegFile = NULL; goto bailout; } /* Scaling and/or a non-JPEG output image format and/or compression options have been selected, so we need to decompress the input/transformed image. */ width = TJSCALED(width, scalingFactor); height = TJSCALED(height, scalingFactor); if (outSubsamp < 0) outSubsamp = inSubsamp; pixelFormat = TJPF_BGRX; if ((imgBuf = (unsigned char *)tjAlloc(width * height * tjPixelSize[pixelFormat])) == NULL) THROW_UNIX("allocating uncompressed image buffer"); if (tjDecompress2(tjInstance, jpegBuf, jpegSize, imgBuf, width, 0, height, pixelFormat, flags) < 0) THROW_TJ("decompressing JPEG image"); tjFree(jpegBuf); jpegBuf = NULL; tjDestroy(tjInstance); tjInstance = NULL; } else { /* Input image is not a JPEG image. Load it into memory. */ if ((imgBuf = tjLoadImage(argv[1], &width, 1, &height, &pixelFormat, 0)) == NULL) THROW_TJ("loading input image"); if (outSubsamp < 0) { if (pixelFormat == TJPF_GRAY) outSubsamp = TJSAMP_GRAY; else outSubsamp = TJSAMP_444; } printf("Input Image: %d x %d pixels\n", width, height); } printf("Output Image (%s): %d x %d pixels", outFormat, width, height); if (!strcasecmp(outFormat, "jpg")) { /* Output image format is JPEG. Compress the uncompressed image. */ unsigned long jpegSize = 0; jpegBuf = NULL; /* Dynamically allocate the JPEG buffer */ if (outQual < 0) outQual = DEFAULT_QUALITY; printf(", %s subsampling, quality = %d\n", subsampName[outSubsamp], outQual); if ((tjInstance = tjInitCompress()) == NULL) THROW_TJ("initializing compressor"); if (tjCompress2(tjInstance, imgBuf, width, 0, height, pixelFormat, &jpegBuf, &jpegSize, outSubsamp, outQual, flags) < 0) THROW_TJ("compressing image"); tjDestroy(tjInstance); tjInstance = NULL; /* Write the JPEG image to disk. */ if ((jpegFile = fopen(argv[2], "wb")) == NULL) THROW_UNIX("opening output file"); if (fwrite(jpegBuf, jpegSize, 1, jpegFile) < 1) THROW_UNIX("writing output file"); tjDestroy(tjInstance); tjInstance = NULL; fclose(jpegFile); jpegFile = NULL; tjFree(jpegBuf); jpegBuf = NULL; } else { /* Output image format is not JPEG. Save the uncompressed image directly to disk. */ printf("\n"); if (tjSaveImage(argv[2], imgBuf, width, 0, height, pixelFormat, 0) < 0) THROW_TJ("saving output image"); } bailout: tjFree(imgBuf); if (tjInstance) tjDestroy(tjInstance); tjFree(jpegBuf); if (jpegFile) fclose(jpegFile); return retval; }