DRC | 8c40ac8 | 2017-11-16 18:46:01 -0600 | [diff] [blame] | 1 | /* |
DRC | 6399d0a | 2019-04-23 14:10:04 -0500 | [diff] [blame] | 2 | * Copyright (C)2011-2012, 2014-2015, 2017, 2019 D. R. Commander. |
| 3 | * All Rights Reserved. |
DRC | 8c40ac8 | 2017-11-16 18:46:01 -0600 | [diff] [blame] | 4 | * |
| 5 | * Redistribution and use in source and binary forms, with or without |
| 6 | * modification, are permitted provided that the following conditions are met: |
| 7 | * |
| 8 | * - Redistributions of source code must retain the above copyright notice, |
| 9 | * this list of conditions and the following disclaimer. |
| 10 | * - Redistributions in binary form must reproduce the above copyright notice, |
| 11 | * this list of conditions and the following disclaimer in the documentation |
| 12 | * and/or other materials provided with the distribution. |
| 13 | * - Neither the name of the libjpeg-turbo Project nor the names of its |
| 14 | * contributors may be used to endorse or promote products derived from this |
| 15 | * software without specific prior written permission. |
| 16 | * |
| 17 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS", |
| 18 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 19 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 20 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE |
| 21 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 22 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 23 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 24 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| 25 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 26 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 27 | * POSSIBILITY OF SUCH DAMAGE. |
| 28 | */ |
| 29 | |
| 30 | /* |
| 31 | * This program demonstrates how to compress, decompress, and transform JPEG |
| 32 | * images using the TurboJPEG C API |
| 33 | */ |
| 34 | |
| 35 | #include <stdio.h> |
| 36 | #include <stdlib.h> |
| 37 | #include <string.h> |
| 38 | #include <errno.h> |
| 39 | #include <turbojpeg.h> |
| 40 | |
| 41 | |
| 42 | #ifdef _WIN32 |
DRC | 293263c | 2018-03-17 15:14:35 -0500 | [diff] [blame] | 43 | #define strcasecmp stricmp |
| 44 | #define strncasecmp strnicmp |
DRC | 8c40ac8 | 2017-11-16 18:46:01 -0600 | [diff] [blame] | 45 | #endif |
| 46 | |
DRC | bce58f4 | 2019-04-12 07:49:35 -0500 | [diff] [blame] | 47 | #define THROW(action, message) { \ |
DRC | 19c791c | 2018-03-08 10:55:20 -0600 | [diff] [blame] | 48 | printf("ERROR in line %d while %s:\n%s\n", __LINE__, action, message); \ |
| 49 | retval = -1; goto bailout; \ |
DRC | 8c40ac8 | 2017-11-16 18:46:01 -0600 | [diff] [blame] | 50 | } |
| 51 | |
DRC | bce58f4 | 2019-04-12 07:49:35 -0500 | [diff] [blame] | 52 | #define THROW_TJ(action) THROW(action, tjGetErrorStr2(tjInstance)) |
DRC | 8c40ac8 | 2017-11-16 18:46:01 -0600 | [diff] [blame] | 53 | |
DRC | bce58f4 | 2019-04-12 07:49:35 -0500 | [diff] [blame] | 54 | #define THROW_UNIX(action) THROW(action, strerror(errno)) |
DRC | 8c40ac8 | 2017-11-16 18:46:01 -0600 | [diff] [blame] | 55 | |
DRC | 293263c | 2018-03-17 15:14:35 -0500 | [diff] [blame] | 56 | #define DEFAULT_SUBSAMP TJSAMP_444 |
| 57 | #define DEFAULT_QUALITY 95 |
DRC | 8c40ac8 | 2017-11-16 18:46:01 -0600 | [diff] [blame] | 58 | |
| 59 | |
| 60 | const char *subsampName[TJ_NUMSAMP] = { |
| 61 | "4:4:4", "4:2:2", "4:2:0", "Grayscale", "4:4:0", "4:1:1" |
| 62 | }; |
| 63 | |
| 64 | const char *colorspaceName[TJ_NUMCS] = { |
| 65 | "RGB", "YCbCr", "GRAY", "CMYK", "YCCK" |
| 66 | }; |
| 67 | |
| 68 | tjscalingfactor *scalingFactors = NULL; |
| 69 | int numScalingFactors = 0; |
| 70 | |
| 71 | |
| 72 | /* DCT filter example. This produces a negative of the image. */ |
| 73 | |
DRC | 6399d0a | 2019-04-23 14:10:04 -0500 | [diff] [blame] | 74 | static int customFilter(short *coeffs, tjregion arrayRegion, |
| 75 | tjregion planeRegion, int componentIndex, |
| 76 | int transformIndex, tjtransform *transform) |
DRC | 8c40ac8 | 2017-11-16 18:46:01 -0600 | [diff] [blame] | 77 | { |
| 78 | int i; |
| 79 | |
DRC | 19c791c | 2018-03-08 10:55:20 -0600 | [diff] [blame] | 80 | for (i = 0; i < arrayRegion.w * arrayRegion.h; i++) |
DRC | 8c40ac8 | 2017-11-16 18:46:01 -0600 | [diff] [blame] | 81 | coeffs[i] = -coeffs[i]; |
| 82 | |
| 83 | return 0; |
| 84 | } |
| 85 | |
| 86 | |
DRC | 6399d0a | 2019-04-23 14:10:04 -0500 | [diff] [blame] | 87 | static void usage(char *programName) |
DRC | 8c40ac8 | 2017-11-16 18:46:01 -0600 | [diff] [blame] | 88 | { |
| 89 | int i; |
| 90 | |
| 91 | printf("\nUSAGE: %s <Input image> <Output image> [options]\n\n", |
| 92 | programName); |
| 93 | |
| 94 | printf("Input and output images can be in Windows BMP or PBMPLUS (PPM/PGM) format. If\n"); |
| 95 | printf("either filename ends in a .jpg extension, then the TurboJPEG API will be used\n"); |
| 96 | printf("to compress or decompress the image.\n\n"); |
| 97 | |
| 98 | printf("Compression Options (used if the output image is a JPEG image)\n"); |
| 99 | printf("--------------------------------------------------------------\n\n"); |
| 100 | |
| 101 | printf("-subsamp <444|422|420|gray> = Apply this level of chrominance subsampling when\n"); |
| 102 | printf(" compressing the output image. The default is to use the same level of\n"); |
| 103 | printf(" subsampling as in the input image, if the input image is also a JPEG\n"); |
| 104 | printf(" image, or to use grayscale if the input image is a grayscale non-JPEG\n"); |
| 105 | printf(" image, or to use %s subsampling otherwise.\n\n", |
| 106 | subsampName[DEFAULT_SUBSAMP]); |
| 107 | |
| 108 | printf("-q <1-100> = Compress the output image with this JPEG quality level\n"); |
| 109 | printf(" (default = %d).\n\n", DEFAULT_QUALITY); |
| 110 | |
| 111 | printf("Decompression Options (used if the input image is a JPEG image)\n"); |
| 112 | printf("---------------------------------------------------------------\n\n"); |
| 113 | |
| 114 | printf("-scale M/N = Scale the input image by a factor of M/N when decompressing it.\n"); |
| 115 | printf("(M/N = "); |
| 116 | for (i = 0; i < numScalingFactors; i++) { |
| 117 | printf("%d/%d", scalingFactors[i].num, scalingFactors[i].denom); |
| 118 | if (numScalingFactors == 2 && i != numScalingFactors - 1) |
| 119 | printf(" or "); |
| 120 | else if (numScalingFactors > 2) { |
| 121 | if (i != numScalingFactors - 1) |
| 122 | printf(", "); |
| 123 | if (i == numScalingFactors - 2) |
| 124 | printf("or "); |
| 125 | } |
| 126 | } |
| 127 | printf(")\n\n"); |
| 128 | |
| 129 | printf("-hflip, -vflip, -transpose, -transverse, -rot90, -rot180, -rot270 =\n"); |
| 130 | printf(" Perform one of these lossless transform operations on the input image\n"); |
| 131 | printf(" prior to decompressing it (these options are mutually exclusive.)\n\n"); |
| 132 | |
| 133 | printf("-grayscale = Perform lossless grayscale conversion on the input image prior\n"); |
| 134 | printf(" to decompressing it (can be combined with the other transform operations\n"); |
| 135 | printf(" above.)\n\n"); |
| 136 | |
| 137 | printf("-crop WxH+X+Y = Perform lossless cropping on the input image prior to\n"); |
| 138 | printf(" decompressing it. X and Y specify the upper left corner of the cropping\n"); |
| 139 | printf(" region, and W and H specify the width and height of the cropping region.\n"); |
| 140 | printf(" X and Y must be evenly divible by the MCU block size (8x8 if the input\n"); |
| 141 | printf(" image was compressed using no subsampling or grayscale, 16x8 if it was\n"); |
| 142 | printf(" compressed using 4:2:2 subsampling, or 16x16 if it was compressed using\n"); |
| 143 | printf(" 4:2:0 subsampling.)\n\n"); |
| 144 | |
| 145 | printf("General Options\n"); |
| 146 | printf("---------------\n\n"); |
| 147 | |
| 148 | printf("-fastupsample = Use the fastest chrominance upsampling algorithm available in\n"); |
| 149 | printf(" the underlying codec.\n\n"); |
| 150 | |
| 151 | printf("-fastdct = Use the fastest DCT/IDCT algorithms available in the underlying\n"); |
| 152 | printf(" codec.\n\n"); |
| 153 | |
| 154 | printf("-accuratedct = Use the most accurate DCT/IDCT algorithms available in the\n"); |
| 155 | printf(" underlying codec.\n\n"); |
| 156 | |
| 157 | exit(1); |
| 158 | } |
| 159 | |
| 160 | |
| 161 | int main(int argc, char **argv) |
| 162 | { |
| 163 | tjscalingfactor scalingFactor = { 1, 1 }; |
| 164 | int outSubsamp = -1, outQual = -1; |
| 165 | tjtransform xform; |
| 166 | int flags = 0; |
| 167 | int width, height; |
| 168 | char *inFormat, *outFormat; |
| 169 | FILE *jpegFile = NULL; |
| 170 | unsigned char *imgBuf = NULL, *jpegBuf = NULL; |
| 171 | int retval = 0, i, pixelFormat = TJPF_UNKNOWN; |
| 172 | tjhandle tjInstance = NULL; |
| 173 | |
| 174 | if ((scalingFactors = tjGetScalingFactors(&numScalingFactors)) == NULL) |
DRC | bce58f4 | 2019-04-12 07:49:35 -0500 | [diff] [blame] | 175 | THROW_TJ("getting scaling factors"); |
DRC | 8c40ac8 | 2017-11-16 18:46:01 -0600 | [diff] [blame] | 176 | memset(&xform, 0, sizeof(tjtransform)); |
| 177 | |
| 178 | if (argc < 3) |
| 179 | usage(argv[0]); |
| 180 | |
| 181 | /* Parse arguments. */ |
| 182 | for (i = 3; i < argc; i++) { |
| 183 | if (!strncasecmp(argv[i], "-sc", 3) && i < argc - 1) { |
| 184 | int match = 0, temp1 = 0, temp2 = 0, j; |
DRC | 19c791c | 2018-03-08 10:55:20 -0600 | [diff] [blame] | 185 | |
DRC | 8c40ac8 | 2017-11-16 18:46:01 -0600 | [diff] [blame] | 186 | if (sscanf(argv[++i], "%d/%d", &temp1, &temp2) < 2) |
| 187 | usage(argv[0]); |
| 188 | for (j = 0; j < numScalingFactors; j++) { |
| 189 | if ((double)temp1 / (double)temp2 == (double)scalingFactors[j].num / |
| 190 | (double)scalingFactors[j].denom) { |
| 191 | scalingFactor = scalingFactors[j]; |
| 192 | match = 1; |
| 193 | break; |
| 194 | } |
| 195 | } |
| 196 | if (match != 1) |
| 197 | usage(argv[0]); |
| 198 | } else if (!strncasecmp(argv[i], "-su", 3) && i < argc - 1) { |
| 199 | i++; |
| 200 | if (!strncasecmp(argv[i], "g", 1)) |
| 201 | outSubsamp = TJSAMP_GRAY; |
| 202 | else if (!strcasecmp(argv[i], "444")) |
| 203 | outSubsamp = TJSAMP_444; |
| 204 | else if (!strcasecmp(argv[i], "422")) |
| 205 | outSubsamp = TJSAMP_422; |
| 206 | else if (!strcasecmp(argv[i], "420")) |
| 207 | outSubsamp = TJSAMP_420; |
| 208 | else |
| 209 | usage(argv[0]); |
| 210 | } else if (!strncasecmp(argv[i], "-q", 2) && i < argc - 1) { |
| 211 | outQual = atoi(argv[++i]); |
| 212 | if (outQual < 1 || outQual > 100) |
| 213 | usage(argv[0]); |
| 214 | } else if (!strncasecmp(argv[i], "-g", 2)) |
| 215 | xform.options |= TJXOPT_GRAY; |
| 216 | else if (!strcasecmp(argv[i], "-hflip")) |
| 217 | xform.op = TJXOP_HFLIP; |
| 218 | else if (!strcasecmp(argv[i], "-vflip")) |
| 219 | xform.op = TJXOP_VFLIP; |
| 220 | else if (!strcasecmp(argv[i], "-transpose")) |
| 221 | xform.op = TJXOP_TRANSPOSE; |
| 222 | else if (!strcasecmp(argv[i], "-transverse")) |
| 223 | xform.op = TJXOP_TRANSVERSE; |
| 224 | else if (!strcasecmp(argv[i], "-rot90")) |
| 225 | xform.op = TJXOP_ROT90; |
| 226 | else if (!strcasecmp(argv[i], "-rot180")) |
| 227 | xform.op = TJXOP_ROT180; |
| 228 | else if (!strcasecmp(argv[i], "-rot270")) |
| 229 | xform.op = TJXOP_ROT270; |
| 230 | else if (!strcasecmp(argv[i], "-custom")) |
| 231 | xform.customFilter = customFilter; |
| 232 | else if (!strncasecmp(argv[i], "-c", 2) && i < argc - 1) { |
| 233 | if (sscanf(argv[++i], "%dx%d+%d+%d", &xform.r.w, &xform.r.h, &xform.r.x, |
| 234 | &xform.r.y) < 4 || |
| 235 | xform.r.x < 0 || xform.r.y < 0 || xform.r.w < 1 || xform.r.h < 1) |
| 236 | usage(argv[0]); |
| 237 | xform.options |= TJXOPT_CROP; |
| 238 | } else if (!strcasecmp(argv[i], "-fastupsample")) { |
| 239 | printf("Using fast upsampling code\n"); |
| 240 | flags |= TJFLAG_FASTUPSAMPLE; |
| 241 | } else if (!strcasecmp(argv[i], "-fastdct")) { |
| 242 | printf("Using fastest DCT/IDCT algorithm\n"); |
| 243 | flags |= TJFLAG_FASTDCT; |
| 244 | } else if (!strcasecmp(argv[i], "-accuratedct")) { |
| 245 | printf("Using most accurate DCT/IDCT algorithm\n"); |
| 246 | flags |= TJFLAG_ACCURATEDCT; |
| 247 | } else usage(argv[0]); |
| 248 | } |
| 249 | |
| 250 | /* Determine input and output image formats based on file extensions. */ |
| 251 | inFormat = strrchr(argv[1], '.'); |
| 252 | outFormat = strrchr(argv[2], '.'); |
| 253 | if (inFormat == NULL || outFormat == NULL || strlen(inFormat) < 2 || |
| 254 | strlen(outFormat) < 2) |
| 255 | usage(argv[0]); |
| 256 | inFormat = &inFormat[1]; |
| 257 | outFormat = &outFormat[1]; |
| 258 | |
| 259 | if (!strcasecmp(inFormat, "jpg")) { |
| 260 | /* Input image is a JPEG image. Decompress and/or transform it. */ |
| 261 | long size; |
| 262 | int inSubsamp, inColorspace; |
| 263 | int doTransform = (xform.op != TJXOP_NONE || xform.options != 0 || |
| 264 | xform.customFilter != NULL); |
| 265 | unsigned long jpegSize; |
| 266 | |
| 267 | /* Read the JPEG file into memory. */ |
| 268 | if ((jpegFile = fopen(argv[1], "rb")) == NULL) |
DRC | bce58f4 | 2019-04-12 07:49:35 -0500 | [diff] [blame] | 269 | THROW_UNIX("opening input file"); |
DRC | 8c40ac8 | 2017-11-16 18:46:01 -0600 | [diff] [blame] | 270 | if (fseek(jpegFile, 0, SEEK_END) < 0 || ((size = ftell(jpegFile)) < 0) || |
| 271 | fseek(jpegFile, 0, SEEK_SET) < 0) |
DRC | bce58f4 | 2019-04-12 07:49:35 -0500 | [diff] [blame] | 272 | THROW_UNIX("determining input file size"); |
DRC | 8c40ac8 | 2017-11-16 18:46:01 -0600 | [diff] [blame] | 273 | if (size == 0) |
DRC | bce58f4 | 2019-04-12 07:49:35 -0500 | [diff] [blame] | 274 | THROW("determining input file size", "Input file contains no data"); |
DRC | 8c40ac8 | 2017-11-16 18:46:01 -0600 | [diff] [blame] | 275 | jpegSize = (unsigned long)size; |
| 276 | if ((jpegBuf = (unsigned char *)tjAlloc(jpegSize)) == NULL) |
DRC | bce58f4 | 2019-04-12 07:49:35 -0500 | [diff] [blame] | 277 | THROW_UNIX("allocating JPEG buffer"); |
DRC | 8c40ac8 | 2017-11-16 18:46:01 -0600 | [diff] [blame] | 278 | if (fread(jpegBuf, jpegSize, 1, jpegFile) < 1) |
DRC | bce58f4 | 2019-04-12 07:49:35 -0500 | [diff] [blame] | 279 | THROW_UNIX("reading input file"); |
DRC | 8c40ac8 | 2017-11-16 18:46:01 -0600 | [diff] [blame] | 280 | fclose(jpegFile); jpegFile = NULL; |
| 281 | |
| 282 | if (doTransform) { |
| 283 | /* Transform it. */ |
| 284 | unsigned char *dstBuf = NULL; /* Dynamically allocate the JPEG buffer */ |
| 285 | unsigned long dstSize = 0; |
| 286 | |
| 287 | if ((tjInstance = tjInitTransform()) == NULL) |
DRC | bce58f4 | 2019-04-12 07:49:35 -0500 | [diff] [blame] | 288 | THROW_TJ("initializing transformer"); |
DRC | 8c40ac8 | 2017-11-16 18:46:01 -0600 | [diff] [blame] | 289 | xform.options |= TJXOPT_TRIM; |
| 290 | if (tjTransform(tjInstance, jpegBuf, jpegSize, 1, &dstBuf, &dstSize, |
| 291 | &xform, flags) < 0) |
DRC | bce58f4 | 2019-04-12 07:49:35 -0500 | [diff] [blame] | 292 | THROW_TJ("transforming input image"); |
DRC | 8c40ac8 | 2017-11-16 18:46:01 -0600 | [diff] [blame] | 293 | tjFree(jpegBuf); |
| 294 | jpegBuf = dstBuf; |
| 295 | jpegSize = dstSize; |
| 296 | } else { |
| 297 | if ((tjInstance = tjInitDecompress()) == NULL) |
DRC | bce58f4 | 2019-04-12 07:49:35 -0500 | [diff] [blame] | 298 | THROW_TJ("initializing decompressor"); |
DRC | 8c40ac8 | 2017-11-16 18:46:01 -0600 | [diff] [blame] | 299 | } |
| 300 | |
| 301 | if (tjDecompressHeader3(tjInstance, jpegBuf, jpegSize, &width, &height, |
| 302 | &inSubsamp, &inColorspace) < 0) |
DRC | bce58f4 | 2019-04-12 07:49:35 -0500 | [diff] [blame] | 303 | THROW_TJ("reading JPEG header"); |
DRC | 8c40ac8 | 2017-11-16 18:46:01 -0600 | [diff] [blame] | 304 | |
| 305 | printf("%s Image: %d x %d pixels, %s subsampling, %s colorspace\n", |
| 306 | (doTransform ? "Transformed" : "Input"), width, height, |
| 307 | subsampName[inSubsamp], colorspaceName[inColorspace]); |
| 308 | |
| 309 | if (!strcasecmp(outFormat, "jpg") && doTransform && |
| 310 | scalingFactor.num == 1 && scalingFactor.denom == 1 && outSubsamp < 0 && |
| 311 | outQual < 0) { |
| 312 | /* Input image has been transformed, and no re-compression options |
| 313 | have been selected. Write the transformed image to disk and exit. */ |
| 314 | if ((jpegFile = fopen(argv[2], "wb")) == NULL) |
DRC | bce58f4 | 2019-04-12 07:49:35 -0500 | [diff] [blame] | 315 | THROW_UNIX("opening output file"); |
DRC | 8c40ac8 | 2017-11-16 18:46:01 -0600 | [diff] [blame] | 316 | if (fwrite(jpegBuf, jpegSize, 1, jpegFile) < 1) |
DRC | bce58f4 | 2019-04-12 07:49:35 -0500 | [diff] [blame] | 317 | THROW_UNIX("writing output file"); |
DRC | 8c40ac8 | 2017-11-16 18:46:01 -0600 | [diff] [blame] | 318 | fclose(jpegFile); jpegFile = NULL; |
| 319 | goto bailout; |
| 320 | } |
| 321 | |
| 322 | /* Scaling and/or a non-JPEG output image format and/or compression options |
| 323 | have been selected, so we need to decompress the input/transformed |
| 324 | image. */ |
| 325 | width = TJSCALED(width, scalingFactor); |
| 326 | height = TJSCALED(height, scalingFactor); |
| 327 | if (outSubsamp < 0) |
| 328 | outSubsamp = inSubsamp; |
| 329 | |
| 330 | pixelFormat = TJPF_BGRX; |
| 331 | if ((imgBuf = (unsigned char *)tjAlloc(width * height * |
| 332 | tjPixelSize[pixelFormat])) == NULL) |
DRC | bce58f4 | 2019-04-12 07:49:35 -0500 | [diff] [blame] | 333 | THROW_UNIX("allocating uncompressed image buffer"); |
DRC | 8c40ac8 | 2017-11-16 18:46:01 -0600 | [diff] [blame] | 334 | |
| 335 | if (tjDecompress2(tjInstance, jpegBuf, jpegSize, imgBuf, width, 0, height, |
| 336 | pixelFormat, flags) < 0) |
DRC | bce58f4 | 2019-04-12 07:49:35 -0500 | [diff] [blame] | 337 | THROW_TJ("decompressing JPEG image"); |
DRC | 8c40ac8 | 2017-11-16 18:46:01 -0600 | [diff] [blame] | 338 | tjFree(jpegBuf); jpegBuf = NULL; |
| 339 | tjDestroy(tjInstance); tjInstance = NULL; |
| 340 | } else { |
| 341 | /* Input image is not a JPEG image. Load it into memory. */ |
| 342 | if ((imgBuf = tjLoadImage(argv[1], &width, 1, &height, &pixelFormat, |
| 343 | 0)) == NULL) |
DRC | bce58f4 | 2019-04-12 07:49:35 -0500 | [diff] [blame] | 344 | THROW_TJ("loading input image"); |
DRC | 8c40ac8 | 2017-11-16 18:46:01 -0600 | [diff] [blame] | 345 | if (outSubsamp < 0) { |
| 346 | if (pixelFormat == TJPF_GRAY) |
| 347 | outSubsamp = TJSAMP_GRAY; |
| 348 | else |
| 349 | outSubsamp = TJSAMP_444; |
| 350 | } |
| 351 | printf("Input Image: %d x %d pixels\n", width, height); |
| 352 | } |
| 353 | |
| 354 | printf("Output Image (%s): %d x %d pixels", outFormat, width, height); |
| 355 | |
| 356 | if (!strcasecmp(outFormat, "jpg")) { |
| 357 | /* Output image format is JPEG. Compress the uncompressed image. */ |
DRC | 8c40ac8 | 2017-11-16 18:46:01 -0600 | [diff] [blame] | 358 | unsigned long jpegSize = 0; |
| 359 | |
DRC | 6399d0a | 2019-04-23 14:10:04 -0500 | [diff] [blame] | 360 | jpegBuf = NULL; /* Dynamically allocate the JPEG buffer */ |
| 361 | |
DRC | 8c40ac8 | 2017-11-16 18:46:01 -0600 | [diff] [blame] | 362 | if (outQual < 0) |
| 363 | outQual = DEFAULT_QUALITY; |
| 364 | printf(", %s subsampling, quality = %d\n", subsampName[outSubsamp], |
| 365 | outQual); |
| 366 | |
| 367 | if ((tjInstance = tjInitCompress()) == NULL) |
DRC | bce58f4 | 2019-04-12 07:49:35 -0500 | [diff] [blame] | 368 | THROW_TJ("initializing compressor"); |
DRC | 8c40ac8 | 2017-11-16 18:46:01 -0600 | [diff] [blame] | 369 | if (tjCompress2(tjInstance, imgBuf, width, 0, height, pixelFormat, |
| 370 | &jpegBuf, &jpegSize, outSubsamp, outQual, flags) < 0) |
DRC | bce58f4 | 2019-04-12 07:49:35 -0500 | [diff] [blame] | 371 | THROW_TJ("compressing image"); |
DRC | 8c40ac8 | 2017-11-16 18:46:01 -0600 | [diff] [blame] | 372 | tjDestroy(tjInstance); tjInstance = NULL; |
| 373 | |
| 374 | /* Write the JPEG image to disk. */ |
| 375 | if ((jpegFile = fopen(argv[2], "wb")) == NULL) |
DRC | bce58f4 | 2019-04-12 07:49:35 -0500 | [diff] [blame] | 376 | THROW_UNIX("opening output file"); |
DRC | 8c40ac8 | 2017-11-16 18:46:01 -0600 | [diff] [blame] | 377 | if (fwrite(jpegBuf, jpegSize, 1, jpegFile) < 1) |
DRC | bce58f4 | 2019-04-12 07:49:35 -0500 | [diff] [blame] | 378 | THROW_UNIX("writing output file"); |
DRC | 8c40ac8 | 2017-11-16 18:46:01 -0600 | [diff] [blame] | 379 | tjDestroy(tjInstance); tjInstance = NULL; |
| 380 | fclose(jpegFile); jpegFile = NULL; |
| 381 | tjFree(jpegBuf); jpegBuf = NULL; |
| 382 | } else { |
| 383 | /* Output image format is not JPEG. Save the uncompressed image |
| 384 | directly to disk. */ |
| 385 | printf("\n"); |
| 386 | if (tjSaveImage(argv[2], imgBuf, width, 0, height, pixelFormat, 0) < 0) |
DRC | bce58f4 | 2019-04-12 07:49:35 -0500 | [diff] [blame] | 387 | THROW_TJ("saving output image"); |
DRC | 8c40ac8 | 2017-11-16 18:46:01 -0600 | [diff] [blame] | 388 | } |
| 389 | |
DRC | 19c791c | 2018-03-08 10:55:20 -0600 | [diff] [blame] | 390 | bailout: |
DRC | 8c40ac8 | 2017-11-16 18:46:01 -0600 | [diff] [blame] | 391 | if (imgBuf) tjFree(imgBuf); |
| 392 | if (tjInstance) tjDestroy(tjInstance); |
| 393 | if (jpegBuf) tjFree(jpegBuf); |
| 394 | if (jpegFile) fclose(jpegFile); |
| 395 | return retval; |
DRC | 19c791c | 2018-03-08 10:55:20 -0600 | [diff] [blame] | 396 | } |