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Side by Side Diff: third_party/libjpeg_turbo/turbojpegl.c

Issue 4134011: Adds libjpeg-turbo to deps... (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/deps/
Patch Set: Created 10 years, 1 month ago
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1 /* Copyright (C)2004 Landmark Graphics Corporation
2 * Copyright (C)2005 Sun Microsystems, Inc.
3 * Copyright (C)2009 D. R. Commander
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-bi t 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
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
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_scanl ine],
192 j->cinfo.image_height-j->cinfo.next_scanline);
193 }
194 jpeg_finish_compress(&j->cinfo);
195 *size=TJBUFSIZE(j->cinfo.image_width, j->cinfo.image_height)
196 -(unsigned long)(j->jdms.free_in_buffer);
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_byte s)
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 decompressio n");
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-bi t RGB input");
291 if(!j->initd) _throw("Instance has not been initialized for decompressio n");
292
293 if(pitch==0) pitch=width*ps;
294
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
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
333 if(flags&TJ_FASTUPSAMPLE) j->dinfo.do_fancy_upsampling=FALSE;
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_scan line],
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 }
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