ViewVC Help
View File | Revision Log | Show Annotations | Download File
/cvs/CV/CV.xs
(Generate patch)

Comparing CV/CV.xs (file contents):
Revision 1.22 by root, Sun Aug 14 02:25:44 2005 UTC vs.
Revision 1.42 by root, Sun Sep 14 12:47:59 2008 UTC

… …
2#include "perl.h" 2#include "perl.h"
3#include "XSUB.h" 3#include "XSUB.h"
4 4
5#include <string.h> 5#include <string.h>
6#include <setjmp.h> 6#include <setjmp.h>
7#include <math.h>
8
9#include <magic.h>
7 10
8#include <jpeglib.h> 11#include <jpeglib.h>
12#include <glib.h>
13#include <gtk/gtk.h>
9#include <gdk-pixbuf/gdk-pixbuf.h> 14#include <gdk-pixbuf/gdk-pixbuf.h>
10 15
11#include <gperl.h> 16#include <gperl.h>
12#include <gtk2perl.h> 17#include <gtk2perl.h>
13 18
14#define IW 80 /* MUST match Schnauer.pm! */ 19#define IW 80 /* MUST match Schnauzer.pm! */
15#define IH 60 /* MUST match Schnauer.pm! */ 20#define IH 60 /* MUST match Schnauzer.pm! */
16 21
17#define RAND (seed = (seed + 7141) * 54773 % 134456) 22#define RAND (seed = (seed + 7141) * 54773 % 134456)
18 23
19#define LINELENGTH 240 24#define LINELENGTH 240
20 25
21#define ELLIPSIS "\xe2\x80\xa6" 26#define ELLIPSIS "\xe2\x80\xa6"
27
28typedef char *octet_string;
22 29
23struct jpg_err_mgr 30struct jpg_err_mgr
24{ 31{
25 struct jpeg_error_mgr err; 32 struct jpeg_error_mgr err;
26 jmp_buf setjmp_buffer; 33 jmp_buf setjmp_buffer;
… …
63 70
64 *h &= 255; 71 *h &= 255;
65 } 72 }
66} 73}
67 74
75struct feature {
76 float v1, v2, v3; // mean, square, cube
77 int n;
78};
79
80static void
81feature_init (struct feature *f)
82{
83 f->v1 = 0.;
84 f->v2 = 0.;
85 f->v3 = 0.;
86 f->n = 0;
87}
88
89// didn't find an algorithm to neatly do mean, variance and skew in one pass.
90// elmex ist schuld.
91static void
92feature_update_pass_1 (struct feature *f, unsigned int v)
93{
94 f->v1 += v;
95 f->n += 1;
96}
97
98static void
99feature_finish_pass_1 (struct feature *f)
100{
101 if (f->n < 1)
102 return;
103
104 f->v1 /= f->n;
105}
106
107static void
108feature_update_pass_2 (struct feature *f, unsigned int v)
109{
110 float d = v - f->v1;
111
112 f->v2 += d * d;
113 f->v3 += d * d * d;
114}
115
116static void
117feature_finish_pass_2 (struct feature *f)
118{
119 if (f->n < 1)
120 return;
121
122 f->v2 /= f->n;
123 f->v3 /= f->n;
124
125 f->v1 /= 255.;
126 f->v2 /= 255. * 255.; f->v2 = sqrtf (f->v2);
127 f->v3 /= 255. * 255. * 255.; f->v3 = powf (fabsf (f->v3), 1./3.);
128}
129
68static guint32 a85_val; 130static guint32 a85_val;
69static guint a85_cnt; 131static guint a85_cnt;
70static guchar a85_buf[LINELENGTH], *a85_ptr; 132static guchar a85_buf[LINELENGTH], *a85_ptr;
71 133
72static void 134static void
… …
124 186
125MODULE = Gtk2::CV PACKAGE = Gtk2::CV 187MODULE = Gtk2::CV PACKAGE = Gtk2::CV
126 188
127PROTOTYPES: ENABLE 189PROTOTYPES: ENABLE
128 190
191# missing function in perl. really :)
192int
193common_prefix_length (a, b)
194 unsigned char *a = (unsigned char *)SvPVutf8_nolen ($arg);
195 unsigned char *b = (unsigned char *)SvPVutf8_nolen ($arg);
196 CODE:
197 RETVAL = 0;
198
199 while (*a == *b && *a)
200 {
201 RETVAL += (*a & 0xc0) != 0x80;
202 a++, b++;
203 }
204
205 OUTPUT:
206 RETVAL
207
208const char *
209magic (octet_string path)
210 CODE:
211{
212 static magic_t cookie;
213
214 if (!cookie)
215 {
216 cookie = magic_open (MAGIC_NONE);
217
218 if (cookie)
219 magic_load (cookie, 0);
220 else
221 XSRETURN_UNDEF;
222 }
223
224 RETVAL = magic_file (cookie, path);
225}
226 OUTPUT:
227 RETVAL
228
229const char *
230magic_mime (octet_string path)
231 CODE:
232{
233 static magic_t cookie;
234
235 if (!cookie)
236 {
237 cookie = magic_open (MAGIC_MIME);
238
239 if (cookie)
240 magic_load (cookie, 0);
241 else
242 XSRETURN_UNDEF;
243 }
244
245 RETVAL = magic_file (cookie, path);
246}
247 OUTPUT:
248 RETVAL
249
129# missing in Gtk2 perl module 250# missing/broken in Gtk2 perl module
251
252void
253gdk_window_clear_hints (GdkWindow *window)
254 CODE:
255 gdk_window_set_geometry_hints (window, 0, 0);
130 256
131gboolean 257gboolean
132gdk_net_wm_supports (GdkAtom property) 258gdk_net_wm_supports (GdkAtom property)
133 CODE: 259 CODE:
134#if defined(GDK_WINDOWING_X11) && !defined(GDK_MULTIHEAD_SAFE) 260#if defined(GDK_WINDOWING_X11) && !defined(GDK_MULTIHEAD_SAFE)
… …
138#endif 264#endif
139 OUTPUT: 265 OUTPUT:
140 RETVAL 266 RETVAL
141 267
142GdkPixbuf_noinc * 268GdkPixbuf_noinc *
143transpose (GdkPixbuf *pb) 269dealpha_expose (GdkPixbuf *pb)
144 CODE: 270 CODE:
145{ 271{
146 int w = gdk_pixbuf_get_width (pb); 272 int w = gdk_pixbuf_get_width (pb);
147 int h = gdk_pixbuf_get_height (pb); 273 int h = gdk_pixbuf_get_height (pb);
148 int bpp = gdk_pixbuf_get_n_channels (pb); 274 int bpp = gdk_pixbuf_get_n_channels (pb);
149 int x, y, i; 275 int x, y, i;
150 guchar *src = gdk_pixbuf_get_pixels (pb), *dst; 276 guchar *src = gdk_pixbuf_get_pixels (pb), *dst;
151 int sstr = gdk_pixbuf_get_rowstride (pb), dstr; 277 int sstr = gdk_pixbuf_get_rowstride (pb), dstr;
152 278
153 RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, bpp == 4, 8, h, w); 279 RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h);
154 280
155 dst = gdk_pixbuf_get_pixels (RETVAL); 281 dst = gdk_pixbuf_get_pixels (RETVAL);
156 dstr = gdk_pixbuf_get_rowstride (RETVAL); 282 dstr = gdk_pixbuf_get_rowstride (RETVAL);
157 283
158 for (y = 0; y < h; y++)
159 for (x = 0; x < w; x++) 284 for (x = 0; x < w; x++)
285 for (y = 0; y < h; y++)
160 for (i = 0; i < bpp; i++) 286 for (i = 0; i < 3; i++)
161 dst[y * bpp + x * dstr + i] = src[x * bpp + y * sstr + i]; 287 dst[x * 3 + y * dstr + i] = src[x * bpp + y * sstr + i];
162} 288}
163 OUTPUT: 289 OUTPUT:
164 RETVAL 290 RETVAL
165 291
166GdkPixbuf_noinc * 292GdkPixbuf_noinc *
167flop (GdkPixbuf *pb) 293rotate (GdkPixbuf *pb, int angle)
168 CODE: 294 CODE:
169{ 295 RETVAL = gdk_pixbuf_rotate_simple (pb, angle == 0 ? GDK_PIXBUF_ROTATE_NONE
170 int w = gdk_pixbuf_get_width (pb); 296 : angle == 90 ? GDK_PIXBUF_ROTATE_COUNTERCLOCKWISE
171 int h = gdk_pixbuf_get_height (pb); 297 : angle == 180 ? GDK_PIXBUF_ROTATE_UPSIDEDOWN
172 int bpp = gdk_pixbuf_get_n_channels (pb); 298 : angle == 270 ? GDK_PIXBUF_ROTATE_CLOCKWISE
173 int x, y, i; 299 : angle);
174 guchar *src = gdk_pixbuf_get_pixels (pb), *dst;
175 int sstr = gdk_pixbuf_get_rowstride (pb), dstr;
176
177 RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, bpp == 4, 8, w, h);
178
179 dst = gdk_pixbuf_get_pixels (RETVAL);
180 dstr = gdk_pixbuf_get_rowstride (RETVAL);
181
182 for (y = 0; y < h; y++)
183 for (x = 0; x < w; x++)
184 for (i = 0; i < bpp; i++)
185 dst[(w - 1 - x) * bpp + y * dstr + i] = src[x * bpp + y * sstr + i];
186}
187 OUTPUT: 300 OUTPUT:
188 RETVAL 301 RETVAL
189 302
190GdkPixbuf_noinc * 303GdkPixbuf_noinc *
191load_jpeg (char *path, int thumbnail=0) 304load_jpeg (SV *path, int thumbnail=0)
192 CODE: 305 CODE:
193{ 306{
194 struct jpeg_decompress_struct cinfo; 307 struct jpeg_decompress_struct cinfo;
195 struct jpg_err_mgr jerr; 308 struct jpg_err_mgr jerr;
196 guchar *data; 309 guchar *data;
197 int rs; 310 int rs;
198 FILE *fp; 311 FILE *fp;
199 volatile GdkPixbuf *pb = 0; 312 volatile GdkPixbuf *pb = 0;
313
200 RETVAL = 0; 314 RETVAL = 0;
201 315
202 if (!(fp = fopen (path, "rb"))) 316 fp = fopen (SvPVbyte_nolen (path), "rb");
317
318 if (!fp)
203 XSRETURN_UNDEF; 319 XSRETURN_UNDEF;
204 320
205 cinfo.err = jpeg_std_error (&jerr.err); 321 cinfo.err = jpeg_std_error (&jerr.err);
206 322
207 jerr.err.error_exit = cv_error_exit; 323 jerr.err.error_exit = cv_error_exit;
… …
278 jpeg_destroy_decompress (&cinfo); 394 jpeg_destroy_decompress (&cinfo);
279} 395}
280 OUTPUT: 396 OUTPUT:
281 RETVAL 397 RETVAL
282 398
399void
400compare (GdkPixbuf *a, GdkPixbuf *b)
401 PPCODE:
402{
403 int w = gdk_pixbuf_get_width (a);
404 int h = gdk_pixbuf_get_height (a);
405 int sa = gdk_pixbuf_get_rowstride (a);
406 int sb = gdk_pixbuf_get_rowstride (b);
407
408 guchar *pa = gdk_pixbuf_get_pixels (a);
409 guchar *pb = gdk_pixbuf_get_pixels (b);
410
411 int x, y;
412
413 assert (w == gdk_pixbuf_get_width (b));
414 assert (h == gdk_pixbuf_get_height (b));
415
416 assert (gdk_pixbuf_get_n_channels (a) == 3);
417 assert (gdk_pixbuf_get_n_channels (b) == 3);
418
419 double diff = 0.;
420 int peak = 0;
421
422 if (w && h)
423 for (y = 0; y < h; y++)
424 {
425 guchar *pa_ = pa + y * sa;
426 guchar *pb_ = pb + y * sb;
427
428 for (x = 0; x < w; x++)
429 {
430 int d;
431
432 d = ((int)*pa_++) - ((int)*pb_++); diff += d*d; peak = MAX (peak, abs (d));
433 d = ((int)*pa_++) - ((int)*pb_++); diff += d*d; peak = MAX (peak, abs (d));
434 d = ((int)*pa_++) - ((int)*pb_++); diff += d*d; peak = MAX (peak, abs (d));
435 }
436 }
437
438 EXTEND (SP, 2);
439 PUSHs (sv_2mortal (newSVnv (sqrt (diff / (w * h * 3. * 255. * 255.)))));
440 PUSHs (sv_2mortal (newSVnv (peak / 255.)));
441}
442
283############################################################################# 443#############################################################################
284 444
285MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Schnauzer 445MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Schnauzer
446
447# currently only works for filenames (octet strings)
286 448
287SV * 449SV *
288foldcase (SV *pathsv) 450foldcase (SV *pathsv)
289 PROTOTYPE: $ 451 PROTOTYPE: $
290 CODE: 452 CODE:
291{ 453{
292 STRLEN plen; 454 STRLEN plen;
293 U8 *path = SvPVutf8 (pathsv, plen); 455 U8 *path = (U8 *)SvPV (pathsv, plen);
294 U8 *pend = path + plen; 456 U8 *pend = path + plen;
295 U8 dst [plen * 6 * 3], *dstp = dst; 457 U8 dst [plen * 6 * 3], *dstp = dst;
296 458
297 while (path < pend) 459 while (path < pend)
298 { 460 {
299 U8 ch = *path; 461 U8 ch = *path;
300 462
301 if (ch >= 'a' && ch <= 'z') 463 if (ch >= 'a' && ch <= 'z')
302 *dstp++ = *path++; 464 *dstp++ = *path++;
465 else if (ch >= 'A' && ch <= 'Z')
466 *dstp++ = *path++ + ('a' - 'A');
303 else if (ch >= '0' && ch <= '9') 467 else if (ch >= '0' && ch <= '9')
304 { 468 {
305 STRLEN el, nl = 0; 469 STRLEN el, nl = 0;
306 while (*path >= '0' && *path <= '9' && path < pend) 470 while (*path >= '0' && *path <= '9' && path < pend)
307 path++, nl++; 471 path++, nl++;
… …
310 *dstp++ = '0'; 474 *dstp++ = '0';
311 475
312 memcpy (dstp, path - nl, nl); 476 memcpy (dstp, path - nl, nl);
313 dstp += nl; 477 dstp += nl;
314 } 478 }
479 else
480 *dstp++ = *path++;
481#if 0
315 else 482 else
316 { 483 {
317 STRLEN cl; 484 STRLEN cl;
318 to_utf8_fold (path, dstp, &cl); 485 to_utf8_fold (path, dstp, &cl);
319 dstp += cl; 486 dstp += cl;
320 path += is_utf8_char (path); 487 path += is_utf8_char (path);
321 } 488 }
489#endif
322 } 490 }
323 491
324 RETVAL = newSVpvn (dst, dstp - dst); 492 RETVAL = newSVpvn ((const char *)dst, dstp - dst);
325} 493}
326 OUTPUT: 494 OUTPUT:
327 RETVAL 495 RETVAL
328 496
329GdkPixbuf_noinc * 497GdkPixbuf_noinc *
330p7_to_pb (int w, int h, guchar *src) 498p7_to_pb (int w, int h, SV *src_sv)
331 PROTOTYPE: @ 499 PROTOTYPE: @
332 CODE: 500 CODE:
333{ 501{
334 int x, y; 502 int x, y;
335 guchar *dst, *d; 503 guchar *dst, *d;
336 int dstr; 504 int dstr;
505 guchar *src = (guchar *)SvPVbyte_nolen (src_sv);
337 506
338 RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h); 507 RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h);
339 dst = gdk_pixbuf_get_pixels (RETVAL); 508 dst = gdk_pixbuf_get_pixels (RETVAL);
340 dstr = gdk_pixbuf_get_rowstride (RETVAL); 509 dstr = gdk_pixbuf_get_rowstride (RETVAL);
341 510
… …
350 } 519 }
351} 520}
352 OUTPUT: 521 OUTPUT:
353 RETVAL 522 RETVAL
354 523
524#############################################################################
525
526MODULE = Gtk2::CV PACKAGE = Gtk2::CV::PostScript
527
528void
529dump_ascii85 (PerlIO *fp, GdkPixbuf *pb)
530 CODE:
531{
532 int w = gdk_pixbuf_get_width (pb);
533 int h = gdk_pixbuf_get_height (pb);
534 int x, y, i;
535 guchar *dst;
536 int bpp = gdk_pixbuf_get_n_channels (pb);
537 guchar *src = gdk_pixbuf_get_pixels (pb);
538 int sstr = gdk_pixbuf_get_rowstride (pb);
539
540 a85_init ();
541
542 for (y = 0; y < h; y++)
543 for (x = 0; x < w; x++)
544 for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
545 a85_push (fp, src [x * bpp + y * sstr + i]);
546
547 a85_finish (fp);
548}
549
550void
551dump_binary (PerlIO *fp, GdkPixbuf *pb)
552 CODE:
553{
554 int w = gdk_pixbuf_get_width (pb);
555 int h = gdk_pixbuf_get_height (pb);
556 int x, y, i;
557 guchar *dst;
558 int bpp = gdk_pixbuf_get_n_channels (pb);
559 guchar *src = gdk_pixbuf_get_pixels (pb);
560 int sstr = gdk_pixbuf_get_rowstride (pb);
561
562 for (y = 0; y < h; y++)
563 for (x = 0; x < w; x++)
564 for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
565 PerlIO_putc (fp, src [x * bpp + y * sstr + i]);
566}
567
568#############################################################################
569
570MODULE = Gtk2::CV PACKAGE = Gtk2::CV
571
355SV * 572SV *
356pb_to_p7 (GdkPixbuf *pb) 573pb_to_hv84 (GdkPixbuf *pb)
357 CODE: 574 CODE:
358{ 575{
359 int w = gdk_pixbuf_get_width (pb); 576 int w = gdk_pixbuf_get_width (pb);
360 int h = gdk_pixbuf_get_height (pb); 577 int h = gdk_pixbuf_get_height (pb);
361 int x, y; 578 int x, y;
362 guchar *dst; 579 guchar *dst;
363 int bpp = gdk_pixbuf_get_n_channels (pb); 580 int bpp = gdk_pixbuf_get_n_channels (pb);
364 guchar *src = gdk_pixbuf_get_pixels (pb); 581 guchar *src = gdk_pixbuf_get_pixels (pb);
365 int sstr = gdk_pixbuf_get_rowstride (pb); 582 int sstr = gdk_pixbuf_get_rowstride (pb);
366 int Er[IW], Eg[IW], Eb[IW];
367 int seed = 77;
368
369 RETVAL = newSV (w * h);
370 SvPOK_only (RETVAL);
371 SvCUR_set (RETVAL, w * h);
372
373 dst = SvPVX (RETVAL);
374
375 memset (Er, 0, sizeof (int) * IW);
376 memset (Eg, 0, sizeof (int) * IW);
377 memset (Eb, 0, sizeof (int) * IW);
378
379 /* some primitive error distribution + random dithering */
380
381 for (y = 0; y < h; y++)
382 {
383 int er = 0, eg = 0, eb = 0;
384
385 for (x = 0; x < w; x++)
386 {
387 int r, g, b;
388 guchar *p = src + x * bpp + y * sstr;
389
390 r = ((p[0] + er + Er[x]) * 7 + (RAND & 127) + 64) / 255;
391 g = ((p[1] + eg + Eg[x]) * 7 + (RAND & 127) + 64) / 255;
392 b = ((p[2] + eb + Eb[x]) * 3 + (RAND & 127) + 64) / 255;
393
394 r = r > 7 ? 7 : r < 0 ? 0 : r;
395 g = g > 7 ? 7 : g < 0 ? 0 : g;
396 b = b > 3 ? 3 : b < 0 ? 0 : b;
397
398 er += p[0] - (r * 255 + 4) / 7;
399 eg += p[1] - (g * 255 + 4) / 7;
400 eb += p[2] - (b * 255 + 2) / 3;
401
402 Er[x] = er >> 1; er -= (er + 1) >> 1;
403 Eg[x] = eg >> 1; eg -= (eg + 1) >> 1;
404 Eb[x] = eb >> 1; eb -= (eb + 1) >> 1;
405
406 *dst++ = r << 5 | g << 2 | b;
407 }
408 }
409}
410 OUTPUT:
411 RETVAL
412
413#############################################################################
414
415MODULE = Gtk2::CV PACKAGE = Gtk2::CV::PostScript
416
417void
418dump_ascii85 (PerlIO *fp, GdkPixbuf *pb)
419 CODE:
420{
421 int w = gdk_pixbuf_get_width (pb);
422 int h = gdk_pixbuf_get_height (pb);
423 int x, y, i;
424 guchar *dst;
425 int bpp = gdk_pixbuf_get_n_channels (pb);
426 guchar *src = gdk_pixbuf_get_pixels (pb);
427 int sstr = gdk_pixbuf_get_rowstride (pb);
428
429 a85_init ();
430
431 for (y = 0; y < h; y++)
432 for (x = 0; x < w; x++)
433 for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
434 a85_push (fp, src [x * bpp + y * sstr + i]);
435
436 a85_finish (fp);
437}
438
439void
440dump_binary (PerlIO *fp, GdkPixbuf *pb)
441 CODE:
442{
443 int w = gdk_pixbuf_get_width (pb);
444 int h = gdk_pixbuf_get_height (pb);
445 int x, y, i;
446 guchar *dst;
447 int bpp = gdk_pixbuf_get_n_channels (pb);
448 guchar *src = gdk_pixbuf_get_pixels (pb);
449 int sstr = gdk_pixbuf_get_rowstride (pb);
450
451 for (y = 0; y < h; y++)
452 for (x = 0; x < w; x++)
453 for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
454 PerlIO_putc (fp, src [x * bpp + y * sstr + i]);
455}
456
457#############################################################################
458
459MODULE = Gtk2::CV PACKAGE = Gtk2::CV
460
461SV *
462pb_to_hv84 (GdkPixbuf *pb)
463 CODE:
464{
465 int w = gdk_pixbuf_get_width (pb);
466 int h = gdk_pixbuf_get_height (pb);
467 int x, y;
468 guchar *dst;
469 int bpp = gdk_pixbuf_get_n_channels (pb);
470 guchar *src = gdk_pixbuf_get_pixels (pb);
471 int sstr = gdk_pixbuf_get_rowstride (pb);
472 583
473 RETVAL = newSV (6 * 8 * 12 / 8); 584 RETVAL = newSV (6 * 8 * 12 / 8);
474 SvPOK_only (RETVAL); 585 SvPOK_only (RETVAL);
475 SvCUR_set (RETVAL, 6 * 8 * 12 / 8); 586 SvCUR_set (RETVAL, 6 * 8 * 12 / 8);
476 587
477 dst = SvPVX (RETVAL); 588 dst = (guchar *)SvPVX (RETVAL);
478 589
479 /* some primitive error distribution + random dithering */ 590 /* some primitive error distribution + random dithering */
480 591
481 for (y = 0; y < h; y++) 592 for (y = 0; y < h; y++)
482 { 593 {
… …
545############################################################################# 656#############################################################################
546 657
547MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Plugin::RCluster 658MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Plugin::RCluster
548 659
549SV * 660SV *
550make_histograms (SV *ar) 661extract_features (SV *ar)
551 CODE: 662 CODE:
552{ 663{
553 int i; 664 int i;
554 AV *av, *result; 665 AV *av, *result;
555 666
556 if (!SvROK (ar) || SvTYPE (SvRV (ar)) != SVt_PVAV) 667 if (!SvROK (ar) || SvTYPE (SvRV (ar)) != SVt_PVAV)
557 croak ("Not an array ref as first argument to make_histogram"); 668 croak ("Not an array ref as first argument to extract_features");
558 669
559 av = (AV *) SvRV (ar); 670 av = (AV *) SvRV (ar);
560 result = newAV (); 671 result = newAV ();
561 672
562 for (i = 0; i <= av_len (av); ++i) 673 for (i = 0; i <= av_len (av); ++i)
563 { 674 {
564 const int HISTSIZE = 64;
565
566 int j;
567 SV *sv = *av_fetch (av, i, 1); 675 SV *sv = *av_fetch (av, i, 1);
568 STRLEN len;
569 char *buf = SvPVbyte (sv, len);
570
571 int tmphist[HISTSIZE];
572 float *hist;
573
574 SV *histsv = newSV (HISTSIZE * sizeof (float) + 1); 676 SV *histsv = newSV (9 * sizeof (float) + 1);
677
575 SvPOK_on (histsv); 678 SvPOK_on (histsv);
576 SvCUR_set (histsv, HISTSIZE * sizeof (float)); 679 SvCUR_set (histsv, 9 * sizeof (float));
577 hist = (float *)SvPVX (histsv); 680 float *hist = (float *)SvPVX (histsv);
578 681
579 Zero (tmphist, sizeof (tmphist), char); 682 struct feature f_h, f_s, f_v;
683 feature_init (&f_h);
684 feature_init (&f_s);
685 feature_init (&f_v);
580 686
581 for (j = len; j--; )
582 {
583 unsigned int idx
584 = ((*buf & 0xc0) >> 2)
585 | ((*buf & 0x18) >> 1)
586 | (*buf & 0x03);
587
588 ++tmphist[idx];
589 ++buf;
590 }
591 687 {
592 for (j = 0; j < HISTSIZE; ++j) 688 STRLEN len;
593 hist[j] = (float)tmphist[j] / (len + 1e-30); 689 unsigned char *buf = (unsigned char *)SvPVbyte (sv, len);
690 while (len >= 3)
691 {
692 unsigned int r, g, b, h, s, v;
693 r = *buf++; g = *buf++; b = *buf++;
694 rgb_to_hsv (r, g, b, &h, &s, &v);
695
696 feature_update_pass_1 (&f_h, h);
697 feature_update_pass_1 (&f_s, s);
698 feature_update_pass_1 (&f_v, v);
699
700 len -= 3;
701 }
702
703 feature_finish_pass_1 (&f_h);
704 feature_finish_pass_1 (&f_s);
705 feature_finish_pass_1 (&f_v);
706 }
707
708 {
709 STRLEN len;
710 unsigned char *buf = (unsigned char *)SvPVbyte (sv, len);
711 while (len >= 3)
712 {
713 unsigned int r, g, b, h, s, v;
714 r = *buf++; g = *buf++; b = *buf++;
715 rgb_to_hsv (r, g, b, &h, &s, &v);
716
717 feature_update_pass_2 (&f_h, h);
718 feature_update_pass_2 (&f_s, s);
719 feature_update_pass_2 (&f_v, v);
720
721 len -= 3;
722 }
723
724 feature_finish_pass_2 (&f_h);
725 feature_finish_pass_2 (&f_s);
726 feature_finish_pass_2 (&f_v);
727 }
728
729 hist [0] = f_h.v1 * 2.; hist [1] = f_h.v2 * 2.; hist [2] = f_h.v3 * 2.;
730 hist [3] = f_s.v1 ; hist [4] = f_s.v2 ; hist [5] = f_s.v3 ;
731 hist [6] = f_v.v1 * .5; hist [7] = f_v.v2 * .5; hist [8] = f_v.v3 * .5;
594 732
595 av_push (result, histsv); 733 av_push (result, histsv);
596 } 734 }
597 735
598 RETVAL = newRV_noinc ((SV *)result); 736 RETVAL = newRV_noinc ((SV *)result);
599} 737}
600 OUTPUT: 738 OUTPUT:
601 RETVAL 739 RETVAL
602 740
603

Diff Legend

– Removed lines
+ Added lines
< Changed lines
> Changed lines