DRC | 2e7b76b | 2009-04-03 12:04:24 +0000 | [diff] [blame] | 1 | /* Copyright (C)2004 Landmark Graphics Corporation |
| 2 | * Copyright (C)2005 Sun Microsystems, Inc. |
DRC | 61e51f9 | 2009-04-05 21:53:20 +0000 | [diff] [blame] | 3 | * Copyright (C)2009 D. R. Commander |
DRC | 2e7b76b | 2009-04-03 12:04:24 +0000 | [diff] [blame] | 4 | * |
| 5 | * This library is free software and may be redistributed and/or modified under |
| 6 | * the terms of the wxWindows Library License, Version 3.1 or (at your option) |
| 7 | * any later version. The full license is in the LICENSE.txt file included |
| 8 | * with this distribution. |
| 9 | * |
| 10 | * This library is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | * wxWindows Library License for more details. |
| 14 | */ |
| 15 | |
| 16 | // This implements a JPEG compressor/decompressor using the libjpeg API |
| 17 | |
| 18 | #include <stdio.h> |
| 19 | #include <stdlib.h> |
| 20 | #include <string.h> |
| 21 | #include <jpeglib.h> |
| 22 | #include <jerror.h> |
| 23 | #include <setjmp.h> |
| 24 | #include "./turbojpeg.h" |
| 25 | |
| 26 | |
| 27 | // Error handling |
| 28 | |
| 29 | static char lasterror[JMSG_LENGTH_MAX]="No error"; |
| 30 | |
| 31 | typedef struct _error_mgr |
| 32 | { |
| 33 | struct jpeg_error_mgr pub; |
| 34 | jmp_buf jb; |
| 35 | } error_mgr; |
| 36 | |
| 37 | static void my_error_exit(j_common_ptr cinfo) |
| 38 | { |
| 39 | error_mgr *myerr = (error_mgr *)cinfo->err; |
| 40 | (*cinfo->err->output_message)(cinfo); |
| 41 | longjmp(myerr->jb, 1); |
| 42 | } |
| 43 | |
| 44 | static void my_output_message(j_common_ptr cinfo) |
| 45 | { |
| 46 | (*cinfo->err->format_message)(cinfo, lasterror); |
| 47 | } |
| 48 | |
| 49 | |
| 50 | // Global structures, macros, etc. |
| 51 | |
| 52 | typedef struct _jpgstruct |
| 53 | { |
| 54 | struct jpeg_compress_struct cinfo; |
| 55 | struct jpeg_decompress_struct dinfo; |
| 56 | struct jpeg_destination_mgr jdms; |
| 57 | struct jpeg_source_mgr jsms; |
| 58 | error_mgr jerr; |
| 59 | int initc, initd; |
| 60 | } jpgstruct; |
| 61 | |
| 62 | static const int hsampfactor[NUMSUBOPT]={1, 2, 2, 1}; |
| 63 | static const int vsampfactor[NUMSUBOPT]={1, 1, 2, 1}; |
| 64 | |
| 65 | #define _throw(c) {sprintf(lasterror, "%s", c); return -1;} |
| 66 | #define _catch(f) {if((f)==-1) return -1;} |
| 67 | #define checkhandle(h) jpgstruct *j=(jpgstruct *)h; \ |
| 68 | if(!j) _throw("Invalid handle"); |
| 69 | |
| 70 | |
| 71 | // CO |
| 72 | |
| 73 | static boolean empty_output_buffer(struct jpeg_compress_struct *cinfo) |
| 74 | { |
| 75 | ERREXIT(cinfo, JERR_BUFFER_SIZE); |
| 76 | return TRUE; |
| 77 | } |
| 78 | |
| 79 | static void destination_noop(struct jpeg_compress_struct *cinfo) |
| 80 | { |
| 81 | } |
| 82 | |
| 83 | DLLEXPORT tjhandle DLLCALL tjInitCompress(void) |
| 84 | { |
| 85 | jpgstruct *j=NULL; |
| 86 | if((j=(jpgstruct *)malloc(sizeof(jpgstruct)))==NULL) |
| 87 | {sprintf(lasterror, "Memory allocation failure"); return NULL;} |
| 88 | memset(j, 0, sizeof(jpgstruct)); |
| 89 | j->cinfo.err=jpeg_std_error(&j->jerr.pub); |
| 90 | j->jerr.pub.error_exit=my_error_exit; |
| 91 | j->jerr.pub.output_message=my_output_message; |
| 92 | |
| 93 | if(setjmp(j->jerr.jb)) |
| 94 | { // this will execute if LIBJPEG has an error |
| 95 | if(j) free(j); return NULL; |
| 96 | } |
| 97 | |
| 98 | jpeg_create_compress(&j->cinfo); |
| 99 | j->cinfo.dest=&j->jdms; |
| 100 | j->jdms.init_destination=destination_noop; |
| 101 | j->jdms.empty_output_buffer=empty_output_buffer; |
| 102 | j->jdms.term_destination=destination_noop; |
| 103 | |
| 104 | j->initc=1; |
| 105 | return (tjhandle)j; |
| 106 | } |
| 107 | |
| 108 | DLLEXPORT unsigned long DLLCALL TJBUFSIZE(int width, int height) |
| 109 | { |
| 110 | // This allows enough room in case the image doesn't compress |
| 111 | return ((width+15)&(~15)) * ((height+15)&(~15)) * 6 + 2048; |
| 112 | } |
| 113 | |
| 114 | DLLEXPORT int DLLCALL tjCompress(tjhandle h, |
| 115 | unsigned char *srcbuf, int width, int pitch, int height, int ps, |
| 116 | unsigned char *dstbuf, unsigned long *size, |
| 117 | int jpegsub, int qual, int flags) |
| 118 | { |
| 119 | int i; JSAMPROW *row_pointer=NULL; |
| 120 | |
| 121 | checkhandle(h); |
| 122 | |
| 123 | if(srcbuf==NULL || width<=0 || pitch<0 || height<=0 |
| 124 | || dstbuf==NULL || size==NULL |
| 125 | || jpegsub<0 || jpegsub>=NUMSUBOPT || qual<0 || qual>100) |
| 126 | _throw("Invalid argument in tjCompress()"); |
| 127 | if(ps!=3 && ps!=4) _throw("This compressor can only take 24-bit or 32-bit RGB input"); |
| 128 | if(!j->initc) _throw("Instance has not been initialized for compression"); |
| 129 | |
| 130 | if(pitch==0) pitch=width*ps; |
| 131 | |
| 132 | j->cinfo.image_width = width; |
| 133 | j->cinfo.image_height = height; |
| 134 | j->cinfo.input_components = ps; |
| 135 | |
| 136 | #if JCS_EXTENSIONS==1 |
| 137 | j->cinfo.in_color_space = JCS_EXT_RGB; |
| 138 | if(ps==3 && (flags&TJ_BGR)) |
| 139 | j->cinfo.in_color_space = JCS_EXT_BGR; |
| 140 | else if(ps==4 && !(flags&TJ_BGR) && !(flags&TJ_ALPHAFIRST)) |
| 141 | j->cinfo.in_color_space = JCS_EXT_RGBX; |
| 142 | else if(ps==4 && (flags&TJ_BGR) && !(flags&TJ_ALPHAFIRST)) |
| 143 | j->cinfo.in_color_space = JCS_EXT_BGRX; |
| 144 | else if(ps==4 && (flags&TJ_BGR) && (flags&TJ_ALPHAFIRST)) |
| 145 | j->cinfo.in_color_space = JCS_EXT_XBGR; |
| 146 | else if(ps==4 && !(flags&TJ_BGR) && (flags&TJ_ALPHAFIRST)) |
| 147 | j->cinfo.in_color_space = JCS_EXT_XRGB; |
| 148 | #else |
| 149 | #error "TurboJPEG requires JPEG colorspace extensions" |
| 150 | #endif |
| 151 | |
DRC | 0c6a271 | 2010-02-22 08:34:44 +0000 | [diff] [blame] | 152 | if(flags&TJ_FORCEMMX) putenv("JSIMD_FORCEMMX=1"); |
| 153 | else if(flags&TJ_FORCESSE) putenv("JSIMD_FORCESSE=1"); |
| 154 | else if(flags&TJ_FORCESSE2) putenv("JSIMD_FORCESSE2=1"); |
| 155 | |
DRC | 2e7b76b | 2009-04-03 12:04:24 +0000 | [diff] [blame] | 156 | if(setjmp(j->jerr.jb)) |
| 157 | { // this will execute if LIBJPEG has an error |
| 158 | if(row_pointer) free(row_pointer); |
| 159 | return -1; |
| 160 | } |
| 161 | |
| 162 | jpeg_set_defaults(&j->cinfo); |
| 163 | |
| 164 | jpeg_set_quality(&j->cinfo, qual, TRUE); |
| 165 | if(jpegsub==TJ_GRAYSCALE) |
| 166 | jpeg_set_colorspace(&j->cinfo, JCS_GRAYSCALE); |
| 167 | else |
| 168 | jpeg_set_colorspace(&j->cinfo, JCS_YCbCr); |
| 169 | j->cinfo.dct_method = JDCT_FASTEST; |
| 170 | |
| 171 | j->cinfo.comp_info[0].h_samp_factor=hsampfactor[jpegsub]; |
| 172 | j->cinfo.comp_info[1].h_samp_factor=1; |
| 173 | j->cinfo.comp_info[2].h_samp_factor=1; |
| 174 | j->cinfo.comp_info[0].v_samp_factor=vsampfactor[jpegsub]; |
| 175 | j->cinfo.comp_info[1].v_samp_factor=1; |
| 176 | j->cinfo.comp_info[2].v_samp_factor=1; |
| 177 | |
| 178 | j->jdms.next_output_byte = dstbuf; |
| 179 | j->jdms.free_in_buffer = TJBUFSIZE(j->cinfo.image_width, j->cinfo.image_height); |
| 180 | |
| 181 | if((row_pointer=(JSAMPROW *)malloc(sizeof(JSAMPROW)*height))==NULL) |
| 182 | _throw("Memory allocation failed in tjInitCompress()"); |
| 183 | for(i=0; i<height; i++) |
| 184 | { |
| 185 | if(flags&TJ_BOTTOMUP) row_pointer[i]= &srcbuf[(height-i-1)*pitch]; |
| 186 | else row_pointer[i]= &srcbuf[i*pitch]; |
| 187 | } |
| 188 | jpeg_start_compress(&j->cinfo, TRUE); |
| 189 | while(j->cinfo.next_scanline<j->cinfo.image_height) |
| 190 | { |
| 191 | jpeg_write_scanlines(&j->cinfo, &row_pointer[j->cinfo.next_scanline], |
| 192 | j->cinfo.image_height-j->cinfo.next_scanline); |
| 193 | } |
| 194 | jpeg_finish_compress(&j->cinfo); |
DRC | 0489909 | 2010-02-26 23:01:19 +0000 | [diff] [blame] | 195 | *size=TJBUFSIZE(j->cinfo.image_width, j->cinfo.image_height) |
| 196 | -(unsigned long)(j->jdms.free_in_buffer); |
DRC | 2e7b76b | 2009-04-03 12:04:24 +0000 | [diff] [blame] | 197 | |
| 198 | if(row_pointer) free(row_pointer); |
| 199 | return 0; |
| 200 | } |
| 201 | |
| 202 | |
| 203 | // DEC |
| 204 | |
| 205 | static boolean fill_input_buffer (struct jpeg_decompress_struct *dinfo) |
| 206 | { |
| 207 | ERREXIT(dinfo, JERR_BUFFER_SIZE); |
| 208 | return TRUE; |
| 209 | } |
| 210 | |
| 211 | static void skip_input_data (struct jpeg_decompress_struct *dinfo, long num_bytes) |
| 212 | { |
| 213 | dinfo->src->next_input_byte += (size_t) num_bytes; |
| 214 | dinfo->src->bytes_in_buffer -= (size_t) num_bytes; |
| 215 | } |
| 216 | |
| 217 | static void source_noop (struct jpeg_decompress_struct *dinfo) |
| 218 | { |
| 219 | } |
| 220 | |
| 221 | DLLEXPORT tjhandle DLLCALL tjInitDecompress(void) |
| 222 | { |
| 223 | jpgstruct *j; |
| 224 | if((j=(jpgstruct *)malloc(sizeof(jpgstruct)))==NULL) |
| 225 | {sprintf(lasterror, "Memory allocation failure"); return NULL;} |
| 226 | memset(j, 0, sizeof(jpgstruct)); |
| 227 | j->dinfo.err=jpeg_std_error(&j->jerr.pub); |
| 228 | j->jerr.pub.error_exit=my_error_exit; |
| 229 | j->jerr.pub.output_message=my_output_message; |
| 230 | |
| 231 | if(setjmp(j->jerr.jb)) |
| 232 | { // this will execute if LIBJPEG has an error |
| 233 | free(j); return NULL; |
| 234 | } |
| 235 | |
| 236 | jpeg_create_decompress(&j->dinfo); |
| 237 | j->dinfo.src=&j->jsms; |
| 238 | j->jsms.init_source=source_noop; |
| 239 | j->jsms.fill_input_buffer = fill_input_buffer; |
| 240 | j->jsms.skip_input_data = skip_input_data; |
| 241 | j->jsms.resync_to_restart = jpeg_resync_to_restart; |
| 242 | j->jsms.term_source = source_noop; |
| 243 | |
| 244 | j->initd=1; |
| 245 | return (tjhandle)j; |
| 246 | } |
| 247 | |
| 248 | |
| 249 | DLLEXPORT int DLLCALL tjDecompressHeader(tjhandle h, |
| 250 | unsigned char *srcbuf, unsigned long size, |
| 251 | int *width, int *height) |
| 252 | { |
| 253 | checkhandle(h); |
| 254 | |
| 255 | if(srcbuf==NULL || size<=0 || width==NULL || height==NULL) |
| 256 | _throw("Invalid argument in tjDecompressHeader()"); |
| 257 | if(!j->initd) _throw("Instance has not been initialized for decompression"); |
| 258 | |
| 259 | if(setjmp(j->jerr.jb)) |
| 260 | { // this will execute if LIBJPEG has an error |
| 261 | return -1; |
| 262 | } |
| 263 | |
| 264 | j->jsms.bytes_in_buffer = size; |
| 265 | j->jsms.next_input_byte = srcbuf; |
| 266 | |
| 267 | jpeg_read_header(&j->dinfo, TRUE); |
| 268 | |
| 269 | *width=j->dinfo.image_width; *height=j->dinfo.image_height; |
| 270 | |
| 271 | jpeg_abort_decompress(&j->dinfo); |
| 272 | |
| 273 | if(*width<1 || *height<1) _throw("Invalid data returned in header"); |
| 274 | return 0; |
| 275 | } |
| 276 | |
| 277 | |
| 278 | DLLEXPORT int DLLCALL tjDecompress(tjhandle h, |
| 279 | unsigned char *srcbuf, unsigned long size, |
| 280 | unsigned char *dstbuf, int width, int pitch, int height, int ps, |
| 281 | int flags) |
| 282 | { |
| 283 | int i; JSAMPROW *row_pointer=NULL; |
| 284 | |
| 285 | checkhandle(h); |
| 286 | |
| 287 | if(srcbuf==NULL || size<=0 |
| 288 | || dstbuf==NULL || width<=0 || pitch<0 || height<=0) |
| 289 | _throw("Invalid argument in tjDecompress()"); |
| 290 | if(ps!=3 && ps!=4) _throw("This compressor can only take 24-bit or 32-bit RGB input"); |
| 291 | if(!j->initd) _throw("Instance has not been initialized for decompression"); |
| 292 | |
| 293 | if(pitch==0) pitch=width*ps; |
| 294 | |
DRC | 0c6a271 | 2010-02-22 08:34:44 +0000 | [diff] [blame] | 295 | if(flags&TJ_FORCEMMX) putenv("JSIMD_FORCEMMX=1"); |
| 296 | else if(flags&TJ_FORCESSE) putenv("JSIMD_FORCESSE=1"); |
| 297 | else if(flags&TJ_FORCESSE2) putenv("JSIMD_FORCESSE2=1"); |
| 298 | |
DRC | 2e7b76b | 2009-04-03 12:04:24 +0000 | [diff] [blame] | 299 | if(setjmp(j->jerr.jb)) |
| 300 | { // this will execute if LIBJPEG has an error |
| 301 | if(row_pointer) free(row_pointer); |
| 302 | return -1; |
| 303 | } |
| 304 | |
| 305 | j->jsms.bytes_in_buffer = size; |
| 306 | j->jsms.next_input_byte = srcbuf; |
| 307 | |
| 308 | jpeg_read_header(&j->dinfo, TRUE); |
| 309 | |
| 310 | if((row_pointer=(JSAMPROW *)malloc(sizeof(JSAMPROW)*height))==NULL) |
| 311 | _throw("Memory allocation failed in tjInitDecompress()"); |
| 312 | for(i=0; i<height; i++) |
| 313 | { |
| 314 | if(flags&TJ_BOTTOMUP) row_pointer[i]= &dstbuf[(height-i-1)*pitch]; |
| 315 | else row_pointer[i]= &dstbuf[i*pitch]; |
| 316 | } |
| 317 | |
| 318 | #if JCS_EXTENSIONS==1 |
| 319 | j->dinfo.out_color_space = JCS_EXT_RGB; |
| 320 | if(ps==3 && (flags&TJ_BGR)) |
| 321 | j->dinfo.out_color_space = JCS_EXT_BGR; |
| 322 | else if(ps==4 && !(flags&TJ_BGR) && !(flags&TJ_ALPHAFIRST)) |
| 323 | j->dinfo.out_color_space = JCS_EXT_RGBX; |
| 324 | else if(ps==4 && (flags&TJ_BGR) && !(flags&TJ_ALPHAFIRST)) |
| 325 | j->dinfo.out_color_space = JCS_EXT_BGRX; |
| 326 | else if(ps==4 && (flags&TJ_BGR) && (flags&TJ_ALPHAFIRST)) |
| 327 | j->dinfo.out_color_space = JCS_EXT_XBGR; |
| 328 | else if(ps==4 && !(flags&TJ_BGR) && (flags&TJ_ALPHAFIRST)) |
| 329 | j->dinfo.out_color_space = JCS_EXT_XRGB; |
| 330 | #else |
| 331 | #error "TurboJPEG requires JPEG colorspace extensions" |
| 332 | #endif |
DRC | 61e51f9 | 2009-04-05 21:53:20 +0000 | [diff] [blame] | 333 | if(flags&TJ_FASTUPSAMPLE) j->dinfo.do_fancy_upsampling=FALSE; |
DRC | 2e7b76b | 2009-04-03 12:04:24 +0000 | [diff] [blame] | 334 | |
| 335 | jpeg_start_decompress(&j->dinfo); |
| 336 | while(j->dinfo.output_scanline<j->dinfo.output_height) |
| 337 | { |
| 338 | jpeg_read_scanlines(&j->dinfo, &row_pointer[j->dinfo.output_scanline], |
| 339 | j->dinfo.output_height-j->dinfo.output_scanline); |
| 340 | } |
| 341 | jpeg_finish_decompress(&j->dinfo); |
| 342 | |
| 343 | if(row_pointer) free(row_pointer); |
| 344 | return 0; |
| 345 | } |
| 346 | |
| 347 | |
| 348 | // General |
| 349 | |
| 350 | DLLEXPORT char* DLLCALL tjGetErrorStr(void) |
| 351 | { |
| 352 | return lasterror; |
| 353 | } |
| 354 | |
| 355 | DLLEXPORT int DLLCALL tjDestroy(tjhandle h) |
| 356 | { |
| 357 | checkhandle(h); |
| 358 | if(setjmp(j->jerr.jb)) return -1; |
| 359 | if(j->initc) jpeg_destroy_compress(&j->cinfo); |
| 360 | if(j->initd) jpeg_destroy_decompress(&j->dinfo); |
| 361 | free(j); |
| 362 | return 0; |
| 363 | } |