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Merge branch 'minidlna' into tomato-ND-USBmod
[tomato.git] / release / src / router / minidlna / image_utils.c
blobd4f0c0f0af18e91de900a9e19c688e3915249af7
1 /* MiniDLNA media server
2 * Copyright (C) 2009 Justin Maggard
3 *
4 * This file is part of MiniDLNA.
5 *
6 * MiniDLNA is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 *
10 * MiniDLNA 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 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with MiniDLNA. If not, see <http://www.gnu.org/licenses/>.
17 */
18
19 /* These functions are mostly based on code from other projects.
20 * There are function to effiently resize a JPEG image, and some utility functions.
21 * They are here to allow loading and saving JPEG data directly to or from memory with libjpeg.
22 * The standard functions only allow you to read from or write to a file.
23 *
24 * The reading code comes from the JpgAlleg library, at http://wiki.allegro.cc/index.php?title=Libjpeg
25 * The writing code was posted on a Google group from openjpeg, at http://groups.google.com/group/openjpeg/browse_thread/thread/331e6cf60f70797f
26 * The resize functions come from the resize_image project, at http://www.golac.fr/Image-Resizer
27 */
28
29 #include <stdio.h>
30 #include <stdlib.h>
31 #include <string.h>
32 #include <unistd.h>
33 #include <sys/types.h>
34 #include <setjmp.h>
35 #include <jpeglib.h>
36 #include <endian.h>
37
38 #include "upnpreplyparse.h"
39 #include "image_utils.h"
40 #include "log.h"
41
42 #if __BYTE_ORDER == __LITTLE_ENDIAN
43 # define SWAP16(w) ( (((w) >> 8) & 0x00ff) | (((w) << 8) & 0xff00) )
44 #else
45 # define SWAP16(w) (w)
46 #endif
47
48 #define JPEG_QUALITY 96
49
50 #define COL(red, green, blue) (((red) << 24) | ((green) << 16) | ((blue) << 8) | 0xFF)
51 #define COL_FULL(red, green, blue, alpha) (((red) << 24) | ((green) << 16) | ((blue) << 8) | (alpha))
52 #define COL_RED(col) (col >> 24)
53 #define COL_GREEN(col) ((col >> 16) & 0xFF)
54 #define COL_BLUE(col) ((col >> 8) & 0xFF)
55 #define COL_ALPHA(col) (col & 0xFF)
56 #define BLACK 0x000000FF
57
58
59 struct my_dst_mgr {
60 struct jpeg_destination_mgr jdst;
61 JOCTET *buf;
62 JOCTET *off;
63 size_t sz;
64 size_t used;
65 };
66
67 /* Destination manager to store data in a buffer */
68 static void
69 my_dst_mgr_init(j_compress_ptr cinfo)
70 {
71 struct my_dst_mgr *dst = (void *)cinfo->dest;
72
73 dst->used = 0;
74 dst->sz = cinfo->image_width
75 * cinfo->image_height
76 * cinfo->input_components;
77 dst->buf = malloc(dst->sz * sizeof *dst->buf);
78 dst->off = dst->buf;
79 dst->jdst.next_output_byte = dst->off;
80 dst->jdst.free_in_buffer = dst->sz;
81
82 return;
83
84 }
85
86 static boolean
87 my_dst_mgr_empty(j_compress_ptr cinfo)
88 {
89 struct my_dst_mgr *dst = (void *)cinfo->dest;
90
91 dst->sz *= 2;
92 dst->used = dst->off - dst->buf;
93 dst->buf = realloc(dst->buf, dst->sz * sizeof *dst->buf);
94 dst->off = dst->buf + dst->used;
95 dst->jdst.next_output_byte = dst->off;
96 dst->jdst.free_in_buffer = dst->sz - dst->used;
97
98 return TRUE;
99
100 }
101
102 static void
103 my_dst_mgr_term(j_compress_ptr cinfo)
104 {
105 struct my_dst_mgr *dst = (void *)cinfo->dest;
106
107 dst->used += dst->sz - dst->jdst.free_in_buffer;
108 dst->off = dst->buf + dst->used;
109
110 return;
111
112 }
113
114 static void
115 jpeg_memory_dest(j_compress_ptr cinfo, struct my_dst_mgr *dst)
116 {
117 dst->jdst.init_destination = my_dst_mgr_init;
118 dst->jdst.empty_output_buffer = my_dst_mgr_empty;
119 dst->jdst.term_destination = my_dst_mgr_term;
120 cinfo->dest = (void *)dst;
121
122 return;
123
124 }
125
126 /* Source manager to read data from a buffer */
127 struct
128 my_src_mgr
129 {
130 struct jpeg_source_mgr pub;
131 JOCTET eoi_buffer[2];
132 };
133
134 static void
135 init_source(j_decompress_ptr cinfo)
136 {
137 return;
138 }
139
140 static int
141 fill_input_buffer(j_decompress_ptr cinfo)
142 {
143 struct my_src_mgr *src = (void *)cinfo->src;
144
145 /* Create a fake EOI marker */
146 src->eoi_buffer[0] = (JOCTET) 0xFF;
147 src->eoi_buffer[1] = (JOCTET) JPEG_EOI;
148 src->pub.next_input_byte = src->eoi_buffer;
149 src->pub.bytes_in_buffer = 2;
150
151 return TRUE;
152 }
153
154 static void
155 skip_input_data(j_decompress_ptr cinfo, long num_bytes)
156 {
157 struct my_src_mgr *src = (void *)cinfo->src;
158 if (num_bytes > 0)
159 {
160 while (num_bytes > (long)src->pub.bytes_in_buffer)
161 {
162 num_bytes -= (long)src->pub.bytes_in_buffer;
163 fill_input_buffer(cinfo);
164 }
165 }
166 src->pub.next_input_byte += num_bytes;
167 src->pub.bytes_in_buffer -= num_bytes;
168 }
169
170 static void
171 term_source(j_decompress_ptr cinfo)
172 {
173 return;
174 }
175
176 void
177 jpeg_memory_src(j_decompress_ptr cinfo, const unsigned char * buffer, size_t bufsize)
178 {
179 struct my_src_mgr *src;
180
181 if (! cinfo->src)
182 {
183 cinfo->src = (*cinfo->mem->alloc_small)((void *)cinfo, JPOOL_PERMANENT, sizeof(struct my_src_mgr));;
184 }
185 src = (void *)cinfo->src;
186 src->pub.init_source = init_source;
187 src->pub.fill_input_buffer = fill_input_buffer;
188 src->pub.skip_input_data = skip_input_data;
189 src->pub.resync_to_restart = jpeg_resync_to_restart;
190 src->pub.term_source = term_source;
191 src->pub.next_input_byte = buffer;
192 src->pub.bytes_in_buffer = bufsize;
193 }
194
195 jmp_buf setjmp_buffer;
196 /* Don't exit on error like libjpeg likes to do */
197 static void
198 libjpeg_error_handler(j_common_ptr cinfo)
199 {
200 cinfo->err->output_message(cinfo);
201 longjmp(setjmp_buffer, 1);
202 return;
203 }
204
205 void
206 image_free(image *pimage)
207 {
208 free(pimage->buf);
209 free(pimage);
210 }
211
212 pix
213 get_pix(image *pimage, int32_t x, int32_t y)
214 {
215 if((x >= 0) && (y >= 0) && (x < pimage->width) && (y < pimage->height))
216 {
217 return(pimage->buf[(y * pimage->width) + x]);
218 }
219 else
220 {
221 pix vpix = BLACK;
222 return(vpix);
223 }
224 }
225
226 void
227 put_pix_alpha_replace(image *pimage, int32_t x, int32_t y, pix col)
228 {
229 if((x >= 0) && (y >= 0) && (x < pimage->width) && (y < pimage->height))
230 pimage->buf[(y * pimage->width) + x] = col;
231 }
232
233 int
234 image_get_jpeg_resolution(const char * path, int * width, int * height)
235 {
236 FILE *img;
237 unsigned char buf[8];
238 u_int16_t offset, h, w;
239 int ret = 1;
240 long size;
241
242
243 img = fopen(path, "r");
244 if( !img )
245 return(-1);
246
247 fseek(img, 0, SEEK_END);
248 size = ftell(img);
249 rewind(img);
250
251 fread(&buf, 2, 1, img);
252 if( (buf[0] != 0xFF) || (buf[1] != 0xD8) )
253 {
254 fclose(img);
255 return(-1);
256 }
257 memset(&buf, 0, sizeof(buf));
258
259 while( ftell(img) < size )
260 {
261 while( buf[0] != 0xFF && !feof(img) )
262 fread(&buf, 1, 1, img);
263
264 while( buf[0] == 0xFF && !feof(img) )
265 fread(&buf, 1, 1, img);
266
267 if( (buf[0] >= 0xc0) && (buf[0] <= 0xc3) )
268 {
269 fread(&buf, 7, 1, img);
270 *width = 0;
271 *height = 0;
272 memcpy(&h, buf+3, 2);
273 *height = SWAP16(h);
274 memcpy(&w, buf+5, 2);
275 *width = SWAP16(w);
276 ret = 0;
277 break;
278 }
279 else
280 {
281 offset = 0;
282 fread(&buf, 2, 1, img);
283 memcpy(&offset, buf, 2);
284 offset = SWAP16(offset) - 2;
285 if( fseek(img, offset, SEEK_CUR) == -1 )
286 break;
287 }
288 }
289 fclose(img);
290 return ret;
291 }
292
293 int
294 image_get_jpeg_date_xmp(const char * path, char ** date)
295 {
296 FILE *img;
297 unsigned char buf[8];
298 char *data = NULL;
299 u_int16_t offset;
300 struct NameValueParserData xml;
301 char * exif;
302 int ret = 1;
303
304 img = fopen(path, "r");
305 if( !img )
306 return(-1);
307
308 fread(&buf, 2, 1, img);
309 if( (buf[0] != 0xFF) || (buf[1] != 0xD8) )
310 {
311 fclose(img);
312 return(-1);
313 }
314 memset(&buf, 0, sizeof(buf));
315
316 while( !feof(img) )
317 {
318 while( buf[0] != 0xFF && !feof(img) )
319 fread(&buf, 1, 1, img);
320
321 while( buf[0] == 0xFF && !feof(img) )
322 fread(&buf, 1, 1, img);
323
324 if( feof(img) )
325 break;
326
327 if( buf[0] == 0xE1 ) // APP1 marker
328 {
329 offset = 0;
330 fread(&buf, 2, 1, img);
331 memcpy(&offset, buf, 2);
332 offset = SWAP16(offset) - 2;
333
334 if( offset < 30 )
335 {
336 fseek(img, offset, SEEK_CUR);
337 continue;
338 }
339
340 data = realloc(data, 30);
341 fread(data, 29, 1, img);
342 offset -= 29;
343 if( strcmp(data, "http://ns.adobe.com/xap/1.0/") != 0 )
344 {
345 fseek(img, offset, SEEK_CUR);
346 continue;
347 }
348
349 data = realloc(data, offset+1);
350 fread(data, offset, 1, img);
351
352 ParseNameValue(data, offset, &xml);
353 exif = GetValueFromNameValueList(&xml, "DateTimeOriginal");
354 if( !exif )
355 {
356 ClearNameValueList(&xml);
357 break;
358 }
359 *date = realloc(*date, strlen(exif)+1);
360 strcpy(*date, exif);
361 ClearNameValueList(&xml);
362
363 ret = 0;
364 break;
365 }
366 else
367 {
368 offset = 0;
369 fread(&buf, 2, 1, img);
370 memcpy(&offset, buf, 2);
371 offset = SWAP16(offset) - 2;
372 fseek(img, offset, SEEK_CUR);
373 }
374 }
375 fclose(img);
376 if( data )
377 free(data);
378 return ret;
379 }
380
381 image *
382 image_new(int32_t width, int32_t height)
383 {
384 image *vimage;
385
386 if((vimage = (image *)malloc(sizeof(image))) == NULL)
387 {
388 DPRINTF(E_WARN, L_METADATA, "malloc failed\n");
389 return NULL;
390 }
391 vimage->width = width; vimage->height = height;
392
393 if((vimage->buf = (pix *)malloc(width * height * sizeof(pix))) == NULL)
394 {
395 DPRINTF(E_WARN, L_METADATA, "malloc failed\n");
396 free(vimage);
397 return NULL;
398 }
399 return(vimage);
400 }
401
402 image *
403 image_new_from_jpeg(const char * path, int is_file, const char * buf, int size, int scale)
404 {
405 image *vimage;
406 FILE *file = NULL;
407 struct jpeg_decompress_struct cinfo;
408 unsigned char *line[16], *ptr;
409 int x, y, i, w, h, ofs;
410 int maxbuf;
411 struct jpeg_error_mgr pub;
412
413
414 cinfo.err = jpeg_std_error(&pub);
415 pub.error_exit = libjpeg_error_handler;
416 jpeg_create_decompress(&cinfo);
417 if( is_file )
418 {
419 if( (file = fopen(path, "r")) == NULL )
420 {
421 return NULL;
422 }
423 jpeg_stdio_src(&cinfo, file);
424 }
425 else
426 {
427 jpeg_memory_src(&cinfo, (const unsigned char *)buf, size);
428 }
429 if( setjmp(setjmp_buffer) )
430 {
431 jpeg_destroy_decompress(&cinfo);
432 if( is_file && file )
433 fclose(file);
434 return NULL;
435 }
436 jpeg_read_header(&cinfo, TRUE);
437 cinfo.scale_denom = scale;
438 cinfo.do_fancy_upsampling = FALSE;
439 cinfo.do_block_smoothing = FALSE;
440 jpeg_start_decompress(&cinfo);
441 w = cinfo.output_width;
442 h = cinfo.output_height;
443 vimage = image_new(w, h);
444 if(!vimage)
445 {
446 jpeg_destroy_decompress(&cinfo);
447 if( is_file )
448 fclose(file);
449 return NULL;
450 }
451
452 if( setjmp(setjmp_buffer) )
453 {
454 jpeg_destroy_decompress(&cinfo);
455 if( is_file && file )
456 fclose(file);
457 if( vimage )
458 {
459 if( vimage->buf )
460 free(vimage->buf);
461 free(vimage);
462 }
463 return NULL;
464 }
465
466 if(cinfo.rec_outbuf_height > 16)
467 {
468 DPRINTF(E_WARN, L_METADATA, "ERROR image_from_jpeg : (image_from_jpeg.c) JPEG uses line buffers > 16. Cannot load.\n");
469 image_free(vimage);
470 if( is_file )
471 fclose(file);
472 return NULL;
473 }
474 maxbuf = vimage->width * vimage->height;
475 if(cinfo.output_components == 3)
476 {
477 ofs = 0;
478 if((ptr = (unsigned char *)malloc(w * 3 * cinfo.rec_outbuf_height)) == NULL)
479 {
480 DPRINTF(E_WARN, L_METADATA, "malloc failed\n");
481 return NULL;
482 }
483
484 for(y = 0; y < h; y += cinfo.rec_outbuf_height)
485 {
486 for(i = 0; i < cinfo.rec_outbuf_height; i++)
487 {
488 line[i] = ptr + (w * 3 * i);
489 }
490 jpeg_read_scanlines(&cinfo, line, cinfo.rec_outbuf_height);
491 for(x = 0; x < w * cinfo.rec_outbuf_height; x++)
492 {
493 if( ofs < maxbuf )
494 {
495 vimage->buf[ofs] = COL(ptr[x + x + x], ptr[x + x + x + 1], ptr[x + x + x + 2]);
496 ofs++;
497 }
498 }
499 }
500 free(ptr);
501 }
502 else if(cinfo.output_components == 1)
503 {
504 ofs = 0;
505 for(i = 0; i < cinfo.rec_outbuf_height; i++)
506 {
507 if((line[i] = (unsigned char *)malloc(w)) == NULL)
508 {
509 int t = 0;
510
511 for(t = 0; t < i; t++) free(line[t]);
512 jpeg_destroy_decompress(&cinfo);
513 image_free(vimage);
514 if( is_file )
515 fclose(file);
516 return NULL;
517 }
518 }
519 for(y = 0; y < h; y += cinfo.rec_outbuf_height)
520 {
521 jpeg_read_scanlines(&cinfo, line, cinfo.rec_outbuf_height);
522 for(i = 0; i < cinfo.rec_outbuf_height; i++)
523 {
524 for(x = 0; x < w; x++)
525 {
526 vimage->buf[ofs++] = COL(line[i][x], line[i][x], line[i][x]);
527 }
528 }
529 }
530 for(i = 0; i < cinfo.rec_outbuf_height; i++)
531 {
532 free(line[i]);
533 }
534 }
535 jpeg_finish_decompress(&cinfo);
536 jpeg_destroy_decompress(&cinfo);
537 if( is_file )
538 fclose(file);
539
540 return vimage;
541 }
542
543 void
544 image_upsize(image * pdest, image * psrc, int32_t width, int32_t height)
545 {
546 int32_t vx, vy;
547 #if !defined __i386__ && !defined __x86_64__
548 int32_t rx, ry;
549 pix vcol;
550
551 if((pdest == NULL) || (psrc == NULL))
552 return;
553
554 for(vy = 0; vy < height; vy++)
555 {
556 for(vx = 0; vx < width; vx++)
557 {
558 rx = ((vx * psrc->width) / width);
559 ry = ((vy * psrc->height) / height);
560 vcol = get_pix(psrc, rx, ry);
561 #else
562 pix vcol,vcol1,vcol2,vcol3,vcol4;
563 float rx,ry;
564 float width_scale, height_scale;
565 float x_dist, y_dist;
566
567 width_scale = (float)psrc->width / (float)width;
568 height_scale = (float)psrc->height / (float)height;
569
570 for(vy = 0;vy < height; vy++)
571 {
572 for(vx = 0;vx < width; vx++)
573 {
574 rx = vx * width_scale;
575 ry = vy * height_scale;
576 vcol1 = get_pix(psrc, (int32_t)rx, (int32_t)ry);
577 vcol2 = get_pix(psrc, ((int32_t)rx)+1, (int32_t)ry);
578 vcol3 = get_pix(psrc, (int32_t)rx, ((int32_t)ry)+1);
579 vcol4 = get_pix(psrc, ((int32_t)rx)+1, ((int32_t)ry)+1);
580
581 x_dist = rx - ((float)((int32_t)rx));
582 y_dist = ry - ((float)((int32_t)ry));
583 vcol = COL_FULL( (u_int8_t)((COL_RED(vcol1)*(1.0-x_dist)
584 + COL_RED(vcol2)*(x_dist))*(1.0-y_dist)
585 + (COL_RED(vcol3)*(1.0-x_dist)
586 + COL_RED(vcol4)*(x_dist))*(y_dist)),
587 (u_int8_t)((COL_GREEN(vcol1)*(1.0-x_dist)
588 + COL_GREEN(vcol2)*(x_dist))*(1.0-y_dist)
589 + (COL_GREEN(vcol3)*(1.0-x_dist)
590 + COL_GREEN(vcol4)*(x_dist))*(y_dist)),
591 (u_int8_t)((COL_BLUE(vcol1)*(1.0-x_dist)
592 + COL_BLUE(vcol2)*(x_dist))*(1.0-y_dist)
593 + (COL_BLUE(vcol3)*(1.0-x_dist)
594 + COL_BLUE(vcol4)*(x_dist))*(y_dist)),
595 (u_int8_t)((COL_ALPHA(vcol1)*(1.0-x_dist)
596 + COL_ALPHA(vcol2)*(x_dist))*(1.0-y_dist)
597 + (COL_ALPHA(vcol3)*(1.0-x_dist)
598 + COL_ALPHA(vcol4)*(x_dist))*(y_dist))
599 );
600 #endif
601 put_pix_alpha_replace(pdest, vx, vy, vcol);
602 }
603 }
604 }
605
606 void
607 image_downsize(image * pdest, image * psrc, int32_t width, int32_t height)
608 {
609 int32_t vx, vy;
610 pix vcol;
611 int32_t i, j;
612 #if !defined __i386__ && !defined __x86_64__
613 int32_t rx, ry, rx_next, ry_next;
614 int red, green, blue, alpha;
615 int factor;
616
617 if((pdest == NULL) || (psrc == NULL))
618 return;
619
620 for(vy = 0; vy < height; vy++)
621 {
622 for(vx = 0; vx < width; vx++)
623 {
624
625 rx = ((vx * psrc->width) / width);
626 ry = ((vy * psrc->height) / height);
627
628 red = green = blue = alpha = 0;
629
630 rx_next = rx + (psrc->width / width);
631 ry_next = ry + (psrc->width / width);
632 factor = 0;
633
634 for( j = rx; j < rx_next; j++)
635 {
636 for( i = ry; i < ry_next; i++)
637 {
638 factor += 1;
639 vcol = get_pix(psrc, j, i);
640
641 red += COL_RED(vcol);
642 green += COL_GREEN(vcol);
643 blue += COL_BLUE(vcol);
644 alpha += COL_ALPHA(vcol);
645 }
646 }
647
648 red /= factor;
649 green /= factor;
650 blue /= factor;
651 alpha /= factor;
652
653 /* on sature les valeurs */
654 red = (red > 255) ? 255 : ((red < 0) ? 0 : red );
655 green = (green > 255) ? 255 : ((green < 0) ? 0 : green);
656 blue = (blue > 255) ? 255 : ((blue < 0) ? 0 : blue );
657 alpha = (alpha > 255) ? 255 : ((alpha < 0) ? 0 : alpha);
658 #else
659 float rx,ry;
660 float width_scale, height_scale;
661 float red, green, blue, alpha;
662 int32_t half_square_width, half_square_height;
663 float round_width, round_height;
664
665 if( (pdest == NULL) || (psrc == NULL) )
666 return;
667
668 width_scale = (float)psrc->width / (float)width;
669 height_scale = (float)psrc->height / (float)height;
670
671 half_square_width = (int32_t)(width_scale / 2.0);
672 half_square_height = (int32_t)(height_scale / 2.0);
673 round_width = (width_scale / 2.0) - (float)half_square_width;
674 round_height = (height_scale / 2.0) - (float)half_square_height;
675 if(round_width > 0.0)
676 half_square_width++;
677 else
678 round_width = 1.0;
679 if(round_height > 0.0)
680 half_square_height++;
681 else
682 round_height = 1.0;
683
684 for(vy = 0;vy < height; vy++)
685 {
686 for(vx = 0;vx < width; vx++)
687 {
688 rx = vx * width_scale;
689 ry = vy * height_scale;
690 vcol = get_pix(psrc, (int32_t)rx, (int32_t)ry);
691
692 red = green = blue = alpha = 0.0;
693
694 for(j=0;j<half_square_height<<1;j++)
695 {
696 for(i=0;i<half_square_width<<1;i++)
697 {
698 vcol = get_pix(psrc, ((int32_t)rx)-half_square_width+i,
699 ((int32_t)ry)-half_square_height+j);
700
701 if(((j == 0) || (j == (half_square_height<<1)-1)) &&
702 ((i == 0) || (i == (half_square_width<<1)-1)))
703 {
704 red += round_width*round_height*(float)COL_RED (vcol);
705 green += round_width*round_height*(float)COL_GREEN(vcol);
706 blue += round_width*round_height*(float)COL_BLUE (vcol);
707 alpha += round_width*round_height*(float)COL_ALPHA(vcol);
708 }
709 else if((j == 0) || (j == (half_square_height<<1)-1))
710 {
711 red += round_height*(float)COL_RED (vcol);
712 green += round_height*(float)COL_GREEN(vcol);
713 blue += round_height*(float)COL_BLUE (vcol);
714 alpha += round_height*(float)COL_ALPHA(vcol);
715 }
716 else if((i == 0) || (i == (half_square_width<<1)-1))
717 {
718 red += round_width*(float)COL_RED (vcol);
719 green += round_width*(float)COL_GREEN(vcol);
720 blue += round_width*(float)COL_BLUE (vcol);
721 alpha += round_width*(float)COL_ALPHA(vcol);
722 }
723 else
724 {
725 red += (float)COL_RED (vcol);
726 green += (float)COL_GREEN(vcol);
727 blue += (float)COL_BLUE (vcol);
728 alpha += (float)COL_ALPHA(vcol);
729 }
730 }
731 }
732
733 red /= width_scale*height_scale;
734 green /= width_scale*height_scale;
735 blue /= width_scale*height_scale;
736 alpha /= width_scale*height_scale;
737
738 /* on sature les valeurs */
739 red = (red > 255.0)? 255.0 : ((red < 0.0)? 0.0:red );
740 green = (green > 255.0)? 255.0 : ((green < 0.0)? 0.0:green);
741 blue = (blue > 255.0)? 255.0 : ((blue < 0.0)? 0.0:blue );
742 alpha = (alpha > 255.0)? 255.0 : ((alpha < 0.0)? 0.0:alpha);
743 #endif
744 put_pix_alpha_replace(pdest, vx, vy,
745 COL_FULL((u_int8_t)red, (u_int8_t)green, (u_int8_t)blue, (u_int8_t)alpha));
746 }
747 }
748 }
749
750 image *
751 image_resize(image * src_image, int32_t width, int32_t height)
752 {
753 image * dst_image;
754
755 dst_image = image_new(width, height);
756 if( !dst_image )
757 return NULL;
758 if( (src_image->width < width) || (src_image->height < height) )
759 image_upsize(dst_image, src_image, width, height);
760 else
761 image_downsize(dst_image, src_image, width, height);
762
763 return dst_image;
764 }
765
766
767 unsigned char *
768 image_save_to_jpeg_buf(image * pimage, int * size)
769 {
770 struct jpeg_compress_struct cinfo;
771 struct jpeg_error_mgr jerr;
772 JSAMPROW row_pointer[1];
773 int row_stride;
774 char *data;
775 int i, x;
776 struct my_dst_mgr dst;
777
778 cinfo.err = jpeg_std_error(&jerr);
779 jpeg_create_compress(&cinfo);
780 jpeg_memory_dest(&cinfo, &dst);
781 cinfo.image_width = pimage->width;
782 cinfo.image_height = pimage->height;
783 cinfo.input_components = 3;
784 cinfo.in_color_space = JCS_RGB;
785 jpeg_set_defaults(&cinfo);
786 jpeg_set_quality(&cinfo, JPEG_QUALITY, TRUE);
787 jpeg_start_compress(&cinfo, TRUE);
788 row_stride = cinfo.image_width * 3;
789 if((data = malloc(row_stride)) == NULL)
790 {
791 DPRINTF(E_WARN, L_METADATA, "malloc failed\n");
792 return NULL;
793 }
794 i = 0;
795 while(cinfo.next_scanline < cinfo.image_height)
796 {
797 for(x = 0; x < pimage->width; x++)
798 {
799 data[x + x + x] = COL_RED(pimage->buf[i]);
800 data[x + x + x + 1] = COL_GREEN(pimage->buf[i]);
801 data[x + x + x + 2] = COL_BLUE(pimage->buf[i]);
802 i++;
803 }
804 row_pointer[0] = (unsigned char *)data;
805 jpeg_write_scanlines(&cinfo, row_pointer, 1);
806 }
807 jpeg_finish_compress(&cinfo);
808 *size = dst.used;
809 free(data);
810 jpeg_destroy_compress(&cinfo);
811
812 return dst.buf;
813 }
814
815 int
816 image_save_to_jpeg_file(image * pimage, const char * path)
817 {
818 int nwritten, size = 0;
819 unsigned char * buf;
820 FILE * dst_file;
821
822 buf = image_save_to_jpeg_buf(pimage, &size);
823 if( !buf )
824 return -1;
825 dst_file = fopen(path, "w");
826 if( !dst_file )
827 {
828 free(buf);
829 return -1;
830 }
831 nwritten = fwrite(buf, 1, size, dst_file);
832 fclose(dst_file);
833 free(buf);
834
835 return (nwritten==size ? 0 : 1);
836 }
Tomato firmware and modifications.