The Android Open Source Project | 34a2564 | 2009-03-03 19:30:03 -0800 | [diff] [blame] | 1 | //-------------------------------------------------------------------------- |
| 2 | // Program to pull the information out of various types of EXIF digital |
| 3 | // camera files and show it in a reasonably consistent way |
| 4 | // |
| 5 | // This module handles basic Jpeg file handling |
| 6 | // |
| 7 | // Matthias Wandel |
| 8 | //-------------------------------------------------------------------------- |
| 9 | #include <utils/Log.h> |
| 10 | #include "jhead.h" |
| 11 | |
| 12 | // Storage for simplified info extracted from file. |
| 13 | ImageInfo_t ImageInfo; |
| 14 | |
| 15 | |
| 16 | static Section_t * Sections = NULL; |
| 17 | static int SectionsAllocated; |
| 18 | static int SectionsRead; |
| 19 | static int HaveAll; |
| 20 | |
| 21 | // Define the line below to turn on poor man's debugging output |
| 22 | #undef SUPERDEBUG |
| 23 | |
| 24 | #ifdef SUPERDEBUG |
| 25 | #define printf LOGE |
| 26 | #endif |
| 27 | |
| 28 | |
| 29 | |
| 30 | #define PSEUDO_IMAGE_MARKER 0x123; // Extra value. |
| 31 | //-------------------------------------------------------------------------- |
| 32 | // Get 16 bits motorola order (always) for jpeg header stuff. |
| 33 | //-------------------------------------------------------------------------- |
| 34 | static int Get16m(const void * Short) |
| 35 | { |
| 36 | return (((uchar *)Short)[0] << 8) | ((uchar *)Short)[1]; |
| 37 | } |
| 38 | |
| 39 | |
| 40 | //-------------------------------------------------------------------------- |
| 41 | // Process a COM marker. |
| 42 | // We want to print out the marker contents as legible text; |
| 43 | // we must guard against random junk and varying newline representations. |
| 44 | //-------------------------------------------------------------------------- |
| 45 | static void process_COM (const uchar * Data, int length) |
| 46 | { |
| 47 | int ch; |
Chih-Chung Chang | d6a02c3 | 2009-03-24 20:34:28 -0700 | [diff] [blame] | 48 | char Comment[MAX_COMMENT_SIZE+1]; |
The Android Open Source Project | 34a2564 | 2009-03-03 19:30:03 -0800 | [diff] [blame] | 49 | int nch; |
| 50 | int a; |
| 51 | |
| 52 | nch = 0; |
| 53 | |
Chih-Chung Chang | d6a02c3 | 2009-03-24 20:34:28 -0700 | [diff] [blame] | 54 | if (length > MAX_COMMENT_SIZE) length = MAX_COMMENT_SIZE; // Truncate if it won't fit in our structure. |
The Android Open Source Project | 34a2564 | 2009-03-03 19:30:03 -0800 | [diff] [blame] | 55 | |
| 56 | for (a=2;a<length;a++){ |
| 57 | ch = Data[a]; |
| 58 | |
| 59 | if (ch == '\r' && Data[a+1] == '\n') continue; // Remove cr followed by lf. |
| 60 | |
| 61 | if (ch >= 32 || ch == '\n' || ch == '\t'){ |
| 62 | Comment[nch++] = (char)ch; |
| 63 | }else{ |
| 64 | Comment[nch++] = '?'; |
| 65 | } |
| 66 | } |
| 67 | |
| 68 | Comment[nch] = '\0'; // Null terminate |
| 69 | |
| 70 | if (ShowTags){ |
| 71 | printf("COM marker comment: %s\n",Comment); |
| 72 | } |
| 73 | |
| 74 | strcpy(ImageInfo.Comments,Comment); |
Chih-Chung Chang | d6a02c3 | 2009-03-24 20:34:28 -0700 | [diff] [blame] | 75 | ImageInfo.CommentWidchars = 0; |
The Android Open Source Project | 34a2564 | 2009-03-03 19:30:03 -0800 | [diff] [blame] | 76 | } |
| 77 | |
| 78 | |
| 79 | //-------------------------------------------------------------------------- |
| 80 | // Process a SOFn marker. This is useful for the image dimensions |
| 81 | //-------------------------------------------------------------------------- |
| 82 | static void process_SOFn (const uchar * Data, int marker) |
| 83 | { |
| 84 | int data_precision, num_components; |
| 85 | |
| 86 | data_precision = Data[2]; |
| 87 | ImageInfo.Height = Get16m(Data+3); |
| 88 | ImageInfo.Width = Get16m(Data+5); |
| 89 | num_components = Data[7]; |
| 90 | |
| 91 | if (num_components == 3){ |
| 92 | ImageInfo.IsColor = 1; |
| 93 | }else{ |
| 94 | ImageInfo.IsColor = 0; |
| 95 | } |
| 96 | |
| 97 | ImageInfo.Process = marker; |
| 98 | |
| 99 | if (ShowTags){ |
| 100 | printf("JPEG image is %uw * %uh, %d color components, %d bits per sample\n", |
| 101 | ImageInfo.Width, ImageInfo.Height, num_components, data_precision); |
| 102 | } |
| 103 | } |
| 104 | |
| 105 | |
| 106 | //-------------------------------------------------------------------------- |
| 107 | // Check sections array to see if it needs to be increased in size. |
| 108 | //-------------------------------------------------------------------------- |
| 109 | void CheckSectionsAllocated(void) |
| 110 | { |
| 111 | if (SectionsRead > SectionsAllocated){ |
| 112 | ErrFatal("allocation screwup"); |
| 113 | } |
| 114 | if (SectionsRead >= SectionsAllocated){ |
| 115 | SectionsAllocated += SectionsAllocated/2; |
| 116 | Sections = (Section_t *)realloc(Sections, sizeof(Section_t)*SectionsAllocated); |
| 117 | if (Sections == NULL){ |
| 118 | ErrFatal("could not allocate data for entire image"); |
| 119 | } |
| 120 | } |
| 121 | } |
| 122 | |
| 123 | |
| 124 | //-------------------------------------------------------------------------- |
| 125 | // Parse the marker stream until SOS or EOI is seen; |
| 126 | //-------------------------------------------------------------------------- |
| 127 | int ReadJpegSections (FILE * infile, ReadMode_t ReadMode) |
| 128 | { |
| 129 | int a; |
| 130 | int HaveCom = FALSE; |
| 131 | |
| 132 | a = fgetc(infile); |
| 133 | |
| 134 | if (a != 0xff || fgetc(infile) != M_SOI){ |
| 135 | return FALSE; |
| 136 | } |
| 137 | for(;;){ |
| 138 | int itemlen; |
| 139 | int marker = 0; |
| 140 | int ll,lh, got; |
| 141 | uchar * Data; |
| 142 | |
| 143 | CheckSectionsAllocated(); |
| 144 | |
Chih-Chung Chang | d6a02c3 | 2009-03-24 20:34:28 -0700 | [diff] [blame] | 145 | for (a=0;a<=16;a++){ |
The Android Open Source Project | 34a2564 | 2009-03-03 19:30:03 -0800 | [diff] [blame] | 146 | marker = fgetc(infile); |
| 147 | if (marker != 0xff) break; |
| 148 | |
Chih-Chung Chang | d6a02c3 | 2009-03-24 20:34:28 -0700 | [diff] [blame] | 149 | if (a >= 16){ |
The Android Open Source Project | 34a2564 | 2009-03-03 19:30:03 -0800 | [diff] [blame] | 150 | fprintf(stderr,"too many padding bytes\n"); |
| 151 | return FALSE; |
| 152 | } |
| 153 | } |
| 154 | |
The Android Open Source Project | 34a2564 | 2009-03-03 19:30:03 -0800 | [diff] [blame] | 155 | |
| 156 | Sections[SectionsRead].Type = marker; |
| 157 | |
| 158 | // Read the length of the section. |
| 159 | lh = fgetc(infile); |
| 160 | ll = fgetc(infile); |
| 161 | |
| 162 | itemlen = (lh << 8) | ll; |
| 163 | |
| 164 | if (itemlen < 2){ |
| 165 | // ErrFatal("invalid marker"); |
| 166 | LOGE("invalid marker"); |
| 167 | return FALSE; |
| 168 | } |
| 169 | |
| 170 | Sections[SectionsRead].Size = itemlen; |
| 171 | |
| 172 | Data = (uchar *)malloc(itemlen); |
| 173 | if (Data == NULL){ |
| 174 | // ErrFatal("Could not allocate memory"); |
| 175 | LOGE("Could not allocate memory"); |
| 176 | return 0; |
| 177 | } |
| 178 | Sections[SectionsRead].Data = Data; |
| 179 | |
| 180 | // Store first two pre-read bytes. |
| 181 | Data[0] = (uchar)lh; |
| 182 | Data[1] = (uchar)ll; |
| 183 | |
| 184 | got = fread(Data+2, 1, itemlen-2, infile); // Read the whole section. |
| 185 | if (got != itemlen-2){ |
| 186 | // ErrFatal("Premature end of file?"); |
| 187 | LOGE("Premature end of file?"); |
| 188 | return FALSE; |
| 189 | } |
| 190 | SectionsRead += 1; |
| 191 | |
| 192 | printf("reading marker %d", marker); |
| 193 | switch(marker){ |
| 194 | |
| 195 | case M_SOS: // stop before hitting compressed data |
| 196 | // If reading entire image is requested, read the rest of the data. |
| 197 | if (ReadMode & READ_IMAGE){ |
| 198 | int cp, ep, size; |
| 199 | // Determine how much file is left. |
| 200 | cp = ftell(infile); |
| 201 | fseek(infile, 0, SEEK_END); |
| 202 | ep = ftell(infile); |
| 203 | fseek(infile, cp, SEEK_SET); |
| 204 | |
| 205 | size = ep-cp; |
| 206 | Data = (uchar *)malloc(size); |
| 207 | if (Data == NULL){ |
| 208 | // ErrFatal("could not allocate data for entire image"); |
| 209 | LOGE("could not allocate data for entire image"); |
| 210 | return FALSE; |
| 211 | } |
| 212 | |
| 213 | got = fread(Data, 1, size, infile); |
| 214 | if (got != size){ |
| 215 | // ErrFatal("could not read the rest of the image"); |
| 216 | LOGE("could not read the rest of the image"); |
| 217 | return FALSE; |
| 218 | } |
| 219 | |
| 220 | CheckSectionsAllocated(); |
| 221 | Sections[SectionsRead].Data = Data; |
| 222 | Sections[SectionsRead].Size = size; |
| 223 | Sections[SectionsRead].Type = PSEUDO_IMAGE_MARKER; |
| 224 | SectionsRead ++; |
| 225 | HaveAll = 1; |
| 226 | } |
| 227 | return TRUE; |
| 228 | |
| 229 | case M_EOI: // in case it's a tables-only JPEG stream |
| 230 | fprintf(stderr,"No image in jpeg!\n"); |
| 231 | return FALSE; |
| 232 | |
| 233 | case M_COM: // Comment section |
| 234 | if (HaveCom || ((ReadMode & READ_METADATA) == 0)){ |
| 235 | // Discard this section. |
| 236 | free(Sections[--SectionsRead].Data); |
| 237 | }else{ |
| 238 | process_COM(Data, itemlen); |
| 239 | HaveCom = TRUE; |
| 240 | } |
| 241 | break; |
| 242 | |
| 243 | case M_JFIF: |
| 244 | // Regular jpegs always have this tag, exif images have the exif |
| 245 | // marker instead, althogh ACDsee will write images with both markers. |
| 246 | // this program will re-create this marker on absence of exif marker. |
| 247 | // hence no need to keep the copy from the file. |
| 248 | free(Sections[--SectionsRead].Data); |
| 249 | break; |
| 250 | |
| 251 | case M_EXIF: |
Chih-Chung Chang | d6a02c3 | 2009-03-24 20:34:28 -0700 | [diff] [blame] | 252 | // There can be different section using the same marker. |
| 253 | if (ReadMode & READ_METADATA){ |
| 254 | if (memcmp(Data+2, "Exif", 4) == 0){ |
| 255 | process_EXIF(Data, itemlen); |
| 256 | break; |
| 257 | }else if (memcmp(Data+2, "http:", 5) == 0){ |
| 258 | Sections[SectionsRead-1].Type = M_XMP; // Change tag for internal purposes. |
| 259 | if (ShowTags){ |
| 260 | printf("Image cotains XMP section, %d bytes long\n", itemlen); |
| 261 | if (ShowTags){ |
| 262 | ShowXmp(Sections[SectionsRead-1]); |
| 263 | } |
| 264 | } |
| 265 | break; |
| 266 | } |
The Android Open Source Project | 34a2564 | 2009-03-03 19:30:03 -0800 | [diff] [blame] | 267 | } |
Chih-Chung Chang | d6a02c3 | 2009-03-24 20:34:28 -0700 | [diff] [blame] | 268 | // Oterwise, discard this section. |
| 269 | free(Sections[--SectionsRead].Data); |
The Android Open Source Project | 34a2564 | 2009-03-03 19:30:03 -0800 | [diff] [blame] | 270 | break; |
| 271 | |
| 272 | case M_IPTC: |
| 273 | if (ReadMode & READ_METADATA){ |
| 274 | if (ShowTags){ |
| 275 | printf("Image cotains IPTC section, %d bytes long\n", itemlen); |
| 276 | } |
| 277 | // Note: We just store the IPTC section. Its relatively straightforward |
| 278 | // and we don't act on any part of it, so just display it at parse time. |
| 279 | }else{ |
| 280 | free(Sections[--SectionsRead].Data); |
| 281 | } |
| 282 | break; |
| 283 | |
| 284 | case M_SOF0: |
| 285 | case M_SOF1: |
| 286 | case M_SOF2: |
| 287 | case M_SOF3: |
| 288 | case M_SOF5: |
| 289 | case M_SOF6: |
| 290 | case M_SOF7: |
| 291 | case M_SOF9: |
| 292 | case M_SOF10: |
| 293 | case M_SOF11: |
| 294 | case M_SOF13: |
| 295 | case M_SOF14: |
| 296 | case M_SOF15: |
| 297 | process_SOFn(Data, marker); |
| 298 | break; |
| 299 | default: |
| 300 | // Skip any other sections. |
| 301 | if (ShowTags){ |
| 302 | printf("Jpeg section marker 0x%02x size %d\n",marker, itemlen); |
| 303 | } |
| 304 | break; |
| 305 | } |
| 306 | } |
| 307 | return TRUE; |
| 308 | } |
| 309 | |
| 310 | //-------------------------------------------------------------------------- |
| 311 | // Discard read data. |
| 312 | //-------------------------------------------------------------------------- |
| 313 | void DiscardData(void) |
| 314 | { |
| 315 | int a; |
| 316 | |
| 317 | for (a=0;a<SectionsRead;a++){ |
| 318 | free(Sections[a].Data); |
| 319 | } |
| 320 | |
| 321 | memset(&ImageInfo, 0, sizeof(ImageInfo)); |
| 322 | SectionsRead = 0; |
| 323 | HaveAll = 0; |
| 324 | } |
| 325 | |
| 326 | //-------------------------------------------------------------------------- |
| 327 | // Read image data. |
| 328 | //-------------------------------------------------------------------------- |
| 329 | int ReadJpegFile(const char * FileName, ReadMode_t ReadMode) |
| 330 | { |
| 331 | FILE * infile; |
| 332 | int ret; |
| 333 | |
| 334 | infile = fopen(FileName, "rb"); // Unix ignores 'b', windows needs it. |
| 335 | |
| 336 | if (infile == NULL) { |
| 337 | LOGE("can't open '%s'", FileName); |
| 338 | fprintf(stderr, "can't open '%s'\n", FileName); |
| 339 | return FALSE; |
| 340 | } |
| 341 | |
| 342 | // Scan the JPEG headers. |
| 343 | printf("ReadJpegSections"); |
| 344 | ret = ReadJpegSections(infile, ReadMode); |
| 345 | if (!ret){ |
| 346 | LOGE("Not JPEG: %s", FileName); |
| 347 | fprintf(stderr,"Not JPEG: %s\n",FileName); |
| 348 | } |
| 349 | |
| 350 | fclose(infile); |
| 351 | |
| 352 | if (ret == FALSE){ |
| 353 | DiscardData(); |
| 354 | } |
| 355 | return ret; |
| 356 | } |
| 357 | |
| 358 | |
| 359 | //-------------------------------------------------------------------------- |
| 360 | // Replace or remove exif thumbnail |
| 361 | //-------------------------------------------------------------------------- |
| 362 | int SaveThumbnail(char * ThumbFileName) |
| 363 | { |
| 364 | FILE * ThumbnailFile; |
| 365 | |
| 366 | if (ImageInfo.ThumbnailOffset == 0 || ImageInfo.ThumbnailSize == 0){ |
| 367 | fprintf(stderr,"Image contains no thumbnail\n"); |
| 368 | return FALSE; |
| 369 | } |
| 370 | |
| 371 | if (strcmp(ThumbFileName, "-") == 0){ |
| 372 | // A filename of '-' indicates thumbnail goes to stdout. |
| 373 | // This doesn't make much sense under Windows, so this feature is unix only. |
| 374 | ThumbnailFile = stdout; |
| 375 | }else{ |
| 376 | ThumbnailFile = fopen(ThumbFileName,"wb"); |
| 377 | } |
| 378 | |
| 379 | if (ThumbnailFile){ |
| 380 | uchar * ThumbnailPointer; |
| 381 | Section_t * ExifSection; |
| 382 | ExifSection = FindSection(M_EXIF); |
| 383 | ThumbnailPointer = ExifSection->Data+ImageInfo.ThumbnailOffset+8; |
| 384 | |
| 385 | fwrite(ThumbnailPointer, ImageInfo.ThumbnailSize ,1, ThumbnailFile); |
| 386 | fclose(ThumbnailFile); |
| 387 | return TRUE; |
| 388 | }else{ |
| 389 | // ErrFatal("Could not write thumbnail file"); |
| 390 | LOGE("Could not write thumbnail file"); |
| 391 | return FALSE; |
| 392 | } |
| 393 | } |
| 394 | |
| 395 | //-------------------------------------------------------------------------- |
| 396 | // Replace or remove exif thumbnail |
| 397 | //-------------------------------------------------------------------------- |
| 398 | int ReplaceThumbnail(const char * ThumbFileName) |
| 399 | { |
| 400 | FILE * ThumbnailFile; |
| 401 | int ThumbLen, NewExifSize; |
| 402 | Section_t * ExifSection; |
| 403 | uchar * ThumbnailPointer; |
| 404 | |
| 405 | if (ImageInfo.ThumbnailOffset == 0 || ImageInfo.ThumbnailAtEnd == FALSE){ |
Chih-Chung Chang | d6a02c3 | 2009-03-24 20:34:28 -0700 | [diff] [blame] | 406 | if (ThumbFileName == NULL){ |
| 407 | // Delete of nonexistent thumbnail (not even pointers present) |
| 408 | // No action, no error. |
| 409 | return FALSE; |
| 410 | } |
| 411 | |
The Android Open Source Project | 34a2564 | 2009-03-03 19:30:03 -0800 | [diff] [blame] | 412 | // Adding or removing of thumbnail is not possible - that would require rearranging |
| 413 | // of the exif header, which is risky, and jhad doesn't know how to do. |
The Android Open Source Project | 34a2564 | 2009-03-03 19:30:03 -0800 | [diff] [blame] | 414 | fprintf(stderr,"Image contains no thumbnail to replace - add is not possible\n"); |
| 415 | #ifdef SUPERDEBUG |
| 416 | LOGE("Image contains no thumbnail to replace - add is not possible\n"); |
| 417 | #endif |
| 418 | return FALSE; |
| 419 | } |
| 420 | |
| 421 | if (ThumbFileName){ |
| 422 | ThumbnailFile = fopen(ThumbFileName,"rb"); |
| 423 | |
| 424 | if (ThumbnailFile == NULL){ |
| 425 | //ErrFatal("Could not read thumbnail file"); |
| 426 | LOGE("Could not read thumbnail file"); |
| 427 | return FALSE; |
| 428 | } |
| 429 | |
| 430 | // get length |
| 431 | fseek(ThumbnailFile, 0, SEEK_END); |
| 432 | |
| 433 | ThumbLen = ftell(ThumbnailFile); |
| 434 | fseek(ThumbnailFile, 0, SEEK_SET); |
| 435 | |
| 436 | if (ThumbLen + ImageInfo.ThumbnailOffset > 0x10000-20){ |
| 437 | //ErrFatal("Thumbnail is too large to insert into exif header"); |
| 438 | LOGE("Thumbnail is too large to insert into exif header"); |
| 439 | return FALSE; |
| 440 | } |
| 441 | }else{ |
Chih-Chung Chang | d6a02c3 | 2009-03-24 20:34:28 -0700 | [diff] [blame] | 442 | if (ImageInfo.ThumbnailSize == 0){ |
| 443 | return FALSE; |
| 444 | } |
| 445 | |
The Android Open Source Project | 34a2564 | 2009-03-03 19:30:03 -0800 | [diff] [blame] | 446 | ThumbLen = 0; |
| 447 | ThumbnailFile = NULL; |
| 448 | } |
| 449 | |
| 450 | ExifSection = FindSection(M_EXIF); |
| 451 | |
| 452 | NewExifSize = ImageInfo.ThumbnailOffset+8+ThumbLen; |
| 453 | ExifSection->Data = (uchar *)realloc(ExifSection->Data, NewExifSize); |
| 454 | |
| 455 | ThumbnailPointer = ExifSection->Data+ImageInfo.ThumbnailOffset+8; |
| 456 | |
| 457 | if (ThumbnailFile){ |
| 458 | fread(ThumbnailPointer, ThumbLen, 1, ThumbnailFile); |
| 459 | fclose(ThumbnailFile); |
| 460 | } |
| 461 | |
| 462 | ImageInfo.ThumbnailSize = ThumbLen; |
| 463 | |
| 464 | Put32u(ExifSection->Data+ImageInfo.ThumbnailSizeOffset+8, ThumbLen); |
| 465 | |
| 466 | ExifSection->Data[0] = (uchar)(NewExifSize >> 8); |
| 467 | ExifSection->Data[1] = (uchar)NewExifSize; |
| 468 | ExifSection->Size = NewExifSize; |
| 469 | |
| 470 | #ifdef SUPERDEBUG |
| 471 | LOGE("ReplaceThumbnail successful thumblen %d", ThumbLen); |
| 472 | #endif |
| 473 | return TRUE; |
| 474 | } |
| 475 | |
| 476 | |
| 477 | //-------------------------------------------------------------------------- |
| 478 | // Discard everything but the exif and comment sections. |
| 479 | //-------------------------------------------------------------------------- |
| 480 | void DiscardAllButExif(void) |
| 481 | { |
| 482 | Section_t ExifKeeper; |
| 483 | Section_t CommentKeeper; |
| 484 | Section_t IptcKeeper; |
Chih-Chung Chang | d6a02c3 | 2009-03-24 20:34:28 -0700 | [diff] [blame] | 485 | Section_t XmpKeeper; |
The Android Open Source Project | 34a2564 | 2009-03-03 19:30:03 -0800 | [diff] [blame] | 486 | int a; |
| 487 | |
| 488 | memset(&ExifKeeper, 0, sizeof(ExifKeeper)); |
| 489 | memset(&CommentKeeper, 0, sizeof(CommentKeeper)); |
| 490 | memset(&IptcKeeper, 0, sizeof(IptcKeeper)); |
Chih-Chung Chang | d6a02c3 | 2009-03-24 20:34:28 -0700 | [diff] [blame] | 491 | memset(&XmpKeeper, 0, sizeof(IptcKeeper)); |
The Android Open Source Project | 34a2564 | 2009-03-03 19:30:03 -0800 | [diff] [blame] | 492 | |
| 493 | for (a=0;a<SectionsRead;a++){ |
| 494 | if (Sections[a].Type == M_EXIF && ExifKeeper.Type == 0){ |
Chih-Chung Chang | d6a02c3 | 2009-03-24 20:34:28 -0700 | [diff] [blame] | 495 | ExifKeeper = Sections[a]; |
| 496 | }else if (Sections[a].Type == M_XMP && XmpKeeper.Type == 0){ |
| 497 | XmpKeeper = Sections[a]; |
The Android Open Source Project | 34a2564 | 2009-03-03 19:30:03 -0800 | [diff] [blame] | 498 | }else if (Sections[a].Type == M_COM && CommentKeeper.Type == 0){ |
| 499 | CommentKeeper = Sections[a]; |
| 500 | }else if (Sections[a].Type == M_IPTC && IptcKeeper.Type == 0){ |
| 501 | IptcKeeper = Sections[a]; |
| 502 | }else{ |
| 503 | free(Sections[a].Data); |
| 504 | } |
| 505 | } |
| 506 | SectionsRead = 0; |
| 507 | if (ExifKeeper.Type){ |
| 508 | CheckSectionsAllocated(); |
| 509 | Sections[SectionsRead++] = ExifKeeper; |
| 510 | } |
| 511 | if (CommentKeeper.Type){ |
| 512 | CheckSectionsAllocated(); |
| 513 | Sections[SectionsRead++] = CommentKeeper; |
| 514 | } |
| 515 | if (IptcKeeper.Type){ |
| 516 | CheckSectionsAllocated(); |
| 517 | Sections[SectionsRead++] = IptcKeeper; |
| 518 | } |
Chih-Chung Chang | d6a02c3 | 2009-03-24 20:34:28 -0700 | [diff] [blame] | 519 | |
| 520 | if (XmpKeeper.Type){ |
| 521 | CheckSectionsAllocated(); |
| 522 | Sections[SectionsRead++] = XmpKeeper; |
| 523 | } |
The Android Open Source Project | 34a2564 | 2009-03-03 19:30:03 -0800 | [diff] [blame] | 524 | } |
| 525 | |
| 526 | //-------------------------------------------------------------------------- |
| 527 | // Write image data back to disk. |
| 528 | //-------------------------------------------------------------------------- |
| 529 | int WriteJpegFile(const char * FileName) |
| 530 | { |
| 531 | FILE * outfile; |
| 532 | int a; |
| 533 | |
| 534 | if (!HaveAll){ |
| 535 | LOGE("Can't write back - didn't read all"); |
| 536 | return FALSE; |
| 537 | } |
| 538 | |
| 539 | outfile = fopen(FileName,"wb"); |
| 540 | if (outfile == NULL){ |
| 541 | LOGE("Could not open file for write"); |
| 542 | return FALSE; |
| 543 | } |
| 544 | |
| 545 | // Initial static jpeg marker. |
| 546 | fputc(0xff,outfile); |
| 547 | fputc(0xd8,outfile); |
| 548 | |
| 549 | if (Sections[0].Type != M_EXIF && Sections[0].Type != M_JFIF){ |
| 550 | // The image must start with an exif or jfif marker. If we threw those away, create one. |
| 551 | static uchar JfifHead[18] = { |
| 552 | 0xff, M_JFIF, |
| 553 | 0x00, 0x10, 'J' , 'F' , 'I' , 'F' , 0x00, 0x01, |
| 554 | 0x01, 0x01, 0x01, 0x2C, 0x01, 0x2C, 0x00, 0x00 |
| 555 | }; |
| 556 | fwrite(JfifHead, 18, 1, outfile); |
| 557 | } |
| 558 | |
Benny Wong | 37f509c | 2009-09-10 13:29:41 -0500 | [diff] [blame] | 559 | int writeOk = FALSE; |
| 560 | int nWrite = 0; |
The Android Open Source Project | 34a2564 | 2009-03-03 19:30:03 -0800 | [diff] [blame] | 561 | // Write all the misc sections |
| 562 | for (a=0;a<SectionsRead-1;a++){ |
| 563 | fputc(0xff,outfile); |
Chih-Chung Chang | d6a02c3 | 2009-03-24 20:34:28 -0700 | [diff] [blame] | 564 | fputc((unsigned char)Sections[a].Type, outfile); |
Benny Wong | 37f509c | 2009-09-10 13:29:41 -0500 | [diff] [blame] | 565 | nWrite = fwrite(Sections[a].Data, 1, Sections[a].Size, outfile); |
| 566 | writeOk = (nWrite == Sections[a].Size); |
| 567 | if(!writeOk){ |
| 568 | LOGE("write section %d failed expect %d actual %d",a,Sections[a].Size,nWrite); |
| 569 | break; |
| 570 | } |
The Android Open Source Project | 34a2564 | 2009-03-03 19:30:03 -0800 | [diff] [blame] | 571 | } |
| 572 | |
| 573 | // Write the remaining image data. |
Benny Wong | 37f509c | 2009-09-10 13:29:41 -0500 | [diff] [blame] | 574 | if (writeOk){ |
| 575 | nWrite = fwrite(Sections[a].Data, 1,Sections[a].Size, outfile); |
| 576 | writeOk = (nWrite == Sections[a].Size); |
| 577 | if (!writeOk){ |
| 578 | LOGE("write section %d failed expect %d actual %d",a,Sections[a].Size,nWrite); |
| 579 | } |
| 580 | } |
The Android Open Source Project | 34a2564 | 2009-03-03 19:30:03 -0800 | [diff] [blame] | 581 | |
| 582 | fclose(outfile); |
Benny Wong | 37f509c | 2009-09-10 13:29:41 -0500 | [diff] [blame] | 583 | return writeOk; |
The Android Open Source Project | 34a2564 | 2009-03-03 19:30:03 -0800 | [diff] [blame] | 584 | } |
| 585 | |
| 586 | |
| 587 | //-------------------------------------------------------------------------- |
| 588 | // Check if image has exif header. |
| 589 | //-------------------------------------------------------------------------- |
| 590 | Section_t * FindSection(int SectionType) |
| 591 | { |
| 592 | int a; |
| 593 | |
| 594 | for (a=0;a<SectionsRead;a++){ |
| 595 | if (Sections[a].Type == SectionType){ |
| 596 | return &Sections[a]; |
| 597 | } |
| 598 | } |
| 599 | // Could not be found. |
| 600 | return NULL; |
| 601 | } |
| 602 | |
| 603 | //-------------------------------------------------------------------------- |
| 604 | // Remove a certain type of section. |
| 605 | //-------------------------------------------------------------------------- |
| 606 | int RemoveSectionType(int SectionType) |
| 607 | { |
| 608 | int a; |
| 609 | for (a=0;a<SectionsRead-1;a++){ |
| 610 | if (Sections[a].Type == SectionType){ |
| 611 | // Free up this section |
| 612 | free (Sections[a].Data); |
| 613 | // Move succeding sections back by one to close space in array. |
| 614 | memmove(Sections+a, Sections+a+1, sizeof(Section_t) * (SectionsRead-a)); |
| 615 | SectionsRead -= 1; |
| 616 | return TRUE; |
| 617 | } |
| 618 | } |
| 619 | return FALSE; |
| 620 | } |
| 621 | |
| 622 | //-------------------------------------------------------------------------- |
| 623 | // Remove sectons not part of image and not exif or comment sections. |
| 624 | //-------------------------------------------------------------------------- |
| 625 | int RemoveUnknownSections(void) |
| 626 | { |
| 627 | int a; |
| 628 | int Modified = FALSE; |
| 629 | for (a=0;a<SectionsRead-1;){ |
| 630 | switch(Sections[a].Type){ |
| 631 | case M_SOF0: |
| 632 | case M_SOF1: |
| 633 | case M_SOF2: |
| 634 | case M_SOF3: |
| 635 | case M_SOF5: |
| 636 | case M_SOF6: |
| 637 | case M_SOF7: |
| 638 | case M_SOF9: |
| 639 | case M_SOF10: |
| 640 | case M_SOF11: |
| 641 | case M_SOF13: |
| 642 | case M_SOF14: |
| 643 | case M_SOF15: |
| 644 | case M_SOI: |
| 645 | case M_EOI: |
| 646 | case M_SOS: |
| 647 | case M_JFIF: |
| 648 | case M_EXIF: |
Chih-Chung Chang | d6a02c3 | 2009-03-24 20:34:28 -0700 | [diff] [blame] | 649 | case M_XMP: |
The Android Open Source Project | 34a2564 | 2009-03-03 19:30:03 -0800 | [diff] [blame] | 650 | case M_COM: |
| 651 | case M_DQT: |
| 652 | case M_DHT: |
| 653 | case M_DRI: |
| 654 | case M_IPTC: |
| 655 | // keep. |
| 656 | a++; |
| 657 | break; |
| 658 | default: |
| 659 | // Unknown. Delete. |
| 660 | free (Sections[a].Data); |
| 661 | // Move succeding sections back by one to close space in array. |
| 662 | memmove(Sections+a, Sections+a+1, sizeof(Section_t) * (SectionsRead-a)); |
| 663 | SectionsRead -= 1; |
| 664 | Modified = TRUE; |
| 665 | } |
| 666 | } |
| 667 | return Modified; |
| 668 | } |
| 669 | |
| 670 | //-------------------------------------------------------------------------- |
| 671 | // Add a section (assume it doesn't already exist) - used for |
| 672 | // adding comment sections and exif sections |
| 673 | //-------------------------------------------------------------------------- |
| 674 | Section_t * CreateSection(int SectionType, unsigned char * Data, int Size) |
| 675 | { |
| 676 | Section_t * NewSection; |
| 677 | int a; |
| 678 | int NewIndex; |
| 679 | NewIndex = 2; |
| 680 | |
| 681 | if (SectionType == M_EXIF) NewIndex = 0; // Exif alwas goes first! |
| 682 | |
| 683 | // Insert it in third position - seems like a safe place to put |
| 684 | // things like comments. |
| 685 | |
| 686 | if (SectionsRead < NewIndex){ |
| 687 | // ErrFatal("Too few sections!"); |
| 688 | LOGE("Too few sections!"); |
| 689 | return FALSE; |
| 690 | } |
| 691 | |
| 692 | CheckSectionsAllocated(); |
| 693 | for (a=SectionsRead;a>NewIndex;a--){ |
| 694 | Sections[a] = Sections[a-1]; |
| 695 | } |
| 696 | SectionsRead += 1; |
| 697 | |
| 698 | NewSection = Sections+NewIndex; |
| 699 | |
| 700 | NewSection->Type = SectionType; |
| 701 | NewSection->Size = Size; |
| 702 | NewSection->Data = Data; |
| 703 | |
| 704 | return NewSection; |
| 705 | } |
| 706 | |
| 707 | |
| 708 | //-------------------------------------------------------------------------- |
| 709 | // Initialisation. |
| 710 | //-------------------------------------------------------------------------- |
| 711 | void ResetJpgfile(void) |
| 712 | { |
| 713 | if (Sections == NULL){ |
| 714 | Sections = (Section_t *)malloc(sizeof(Section_t)*5); |
| 715 | SectionsAllocated = 5; |
| 716 | } |
| 717 | |
| 718 | SectionsRead = 0; |
| 719 | HaveAll = 0; |
| 720 | } |