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Comparing CV/CV.xs (file contents):
Revision 1.32 by root, Wed Feb 15 08:36:55 2006 UTC vs.
Revision 1.51 by root, Sat Dec 23 04:11:49 2017 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>
7 8
8#include <magic.h> 9#include <magic.h>
9 10
10#include <jpeglib.h> 11#include <jpeglib.h>
11#include <glib.h> 12#include <glib.h>
12#include <gtk/gtk.h> 13#include <gtk/gtk.h>
14#include <gdk/gdkx.h>
13#include <gdk-pixbuf/gdk-pixbuf.h> 15#include <gdk-pixbuf/gdk-pixbuf.h>
14 16
15#include <gperl.h> 17#include <gperl.h>
16#include <gtk2perl.h> 18#include <gtk2perl.h>
17 19
20#include <assert.h>
21
22#if WEBP
23#include <webp/decode.h>
24#endif
25
26#include "perlmulticore.h"
27
18#define IW 80 /* MUST match Schnauer.pm! */ 28#define IW 80 /* MUST match Schnauzer.pm! */
19#define IH 60 /* MUST match Schnauer.pm! */ 29#define IH 60 /* MUST match Schnauzer.pm! */
20 30
21#define RAND (seed = (seed + 7141) * 54773 % 134456) 31#define RAND (seed = (seed + 7141) * 54773 % 134456)
22 32
23#define LINELENGTH 240 33#define LINELENGTH 240
24 34
25#define ELLIPSIS "\xe2\x80\xa6" 35#define ELLIPSIS "\xe2\x80\xa6"
36
37typedef char *octet_string;
38
39static magic_t magic_cookie[2]; /* !mime, mime */
26 40
27struct jpg_err_mgr 41struct jpg_err_mgr
28{ 42{
29 struct jpeg_error_mgr err; 43 struct jpeg_error_mgr err;
30 jmp_buf setjmp_buffer; 44 jmp_buf setjmp_buffer;
31}; 45};
32 46
33static void 47static void
34cv_error_exit (j_common_ptr cinfo) 48cv_error_exit (j_common_ptr cinfo)
35{ 49{
50 cinfo->err->output_message (cinfo);
36 longjmp (((struct jpg_err_mgr *)cinfo->err)->setjmp_buffer, 99); 51 longjmp (((struct jpg_err_mgr *)cinfo->err)->setjmp_buffer, 99);
37} 52}
38 53
39static void 54static void
40cv_error_output (j_common_ptr cinfo) 55cv_error_output (j_common_ptr cinfo)
41{ 56{
57 char msg[JMSG_LENGTH_MAX];
58
59 cinfo->err->format_message (cinfo, msg);
60
61 fprintf (stderr, "JPEG decoding error: %s\n", msg);
42 return; 62 return;
43} 63}
44 64
45static void 65static void
46rgb_to_hsv (unsigned int r, unsigned int g, unsigned int b, 66rgb_to_hsv (unsigned int r, unsigned int g, unsigned int b,
… …
67 87
68 *h &= 255; 88 *h &= 255;
69 } 89 }
70} 90}
71 91
92struct feature {
93 float v1, v2, v3; // mean, square, cube
94 int n;
95};
96
97static void
98feature_init (struct feature *f)
99{
100 f->v1 = 0.;
101 f->v2 = 0.;
102 f->v3 = 0.;
103 f->n = 0;
104}
105
106// didn't find an algorithm to neatly do mean, variance and skew in one pass.
107// elmex ist schuld.
108static void
109feature_update_pass_1 (struct feature *f, unsigned int v)
110{
111 f->v1 += v;
112 f->n += 1;
113}
114
115static void
116feature_finish_pass_1 (struct feature *f)
117{
118 if (f->n < 1)
119 return;
120
121 f->v1 /= f->n;
122}
123
124static void
125feature_update_pass_2 (struct feature *f, unsigned int v)
126{
127 float d = v - f->v1;
128
129 f->v2 += d * d;
130 f->v3 += d * d * d;
131}
132
133static void
134feature_finish_pass_2 (struct feature *f)
135{
136 if (f->n < 1)
137 return;
138
139 f->v2 /= f->n;
140 f->v3 /= f->n;
141
142 f->v1 /= 255.;
143 f->v2 /= 255. * 255.; f->v2 = sqrtf (f->v2);
144 f->v3 /= 255. * 255. * 255.; f->v3 = powf (fabsf (f->v3), 1./3.);
145}
146
72static guint32 a85_val; 147static guint32 a85_val;
73static guint a85_cnt; 148static guint a85_cnt;
74static guchar a85_buf[LINELENGTH], *a85_ptr; 149static guchar a85_buf[LINELENGTH], *a85_ptr;
75 150
76static void 151static void
… …
88 if (!--a85_cnt) 163 if (!--a85_cnt)
89 { 164 {
90 a85_cnt = 4; 165 a85_cnt = 4;
91 if (a85_val) 166 if (a85_val)
92 { 167 {
93 a85_ptr[4] = (a85_val % 85) + 33; a85_val /= 85; 168 a85_ptr[4] = (a85_val % 85) + 33; a85_val /= 85;
94 a85_ptr[3] = (a85_val % 85) + 33; a85_val /= 85; 169 a85_ptr[3] = (a85_val % 85) + 33; a85_val /= 85;
95 a85_ptr[2] = (a85_val % 85) + 33; a85_val /= 85; 170 a85_ptr[2] = (a85_val % 85) + 33; a85_val /= 85;
96 a85_ptr[1] = (a85_val % 85) + 33; a85_val /= 85; 171 a85_ptr[1] = (a85_val % 85) + 33; a85_val /= 85;
97 a85_ptr[0] = (a85_val ) + 33; 172 a85_ptr[0] = (a85_val ) + 33;
98 173
99 a85_ptr += 5; 174 a85_ptr += 5;
100 } 175 }
… …
146 221
147 OUTPUT: 222 OUTPUT:
148 RETVAL 223 RETVAL
149 224
150const char * 225const char *
151magic (const char *path) 226magic (SV *path_or_data)
227 ALIAS:
228 magic = 0
229 magic_mime = 1
230 magic_buffer = 2
231 magic_buffer_mime = 3
152 CODE: 232 CODE:
153{ 233{
154 static magic_t cookie; 234 STRLEN len;
235 char *data = SvPVbyte (path_or_data, len);
155 236
237 perlinterp_release ();
238
156 if (!cookie) 239 if (!magic_cookie[0])
240 {
241 magic_cookie[0] = magic_open (MAGIC_SYMLINK);
242 magic_cookie[1] = magic_open (MAGIC_SYMLINK | MAGIC_MIME);
157 { 243 }
158 cookie = magic_open (MAGIC_NONE);
159 244
160 if (cookie) 245 RETVAL = ix & 2
161 magic_load (cookie, 0); 246 ? magic_buffer (magic_cookie[ix], data, len)
162 else 247 : magic_file (magic_cookie[ix], data);
163 XSRETURN_UNDEF;
164 }
165 248
166 RETVAL = magic_file (cookie, path); 249 perlinterp_acquire ();
167} 250}
168 OUTPUT: 251 OUTPUT:
169 RETVAL 252 RETVAL
170 253
171const char *
172magic_mime (const char *path)
173 CODE:
174{
175 static magic_t cookie;
176
177 if (!cookie)
178 {
179 cookie = magic_open (MAGIC_MIME);
180
181 if (cookie)
182 magic_load (cookie, 0);
183 else
184 XSRETURN_UNDEF;
185 }
186
187 RETVAL = magic_file (cookie, path);
188}
189 OUTPUT:
190 RETVAL
191
192# missing in Gtk2 perl module 254# missing/broken in Gtk2 perl module
255
256void
257gdk_window_clear_hints (GdkWindow *window)
258 CODE:
259 gdk_window_set_geometry_hints (window, 0, 0);
193 260
194gboolean 261gboolean
195gdk_net_wm_supports (GdkAtom property) 262gdk_net_wm_supports (GdkAtom property)
196 CODE: 263 CODE:
197#if defined(GDK_WINDOWING_X11) && !defined(GDK_MULTIHEAD_SAFE) 264#if defined(GDK_WINDOWING_X11) && !defined(GDK_MULTIHEAD_SAFE)
… …
203 RETVAL 270 RETVAL
204 271
205GdkPixbuf_noinc * 272GdkPixbuf_noinc *
206dealpha_expose (GdkPixbuf *pb) 273dealpha_expose (GdkPixbuf *pb)
207 CODE: 274 CODE:
275 perlinterp_release ();
208{ 276{
209 int w = gdk_pixbuf_get_width (pb); 277 int w = gdk_pixbuf_get_width (pb);
210 int h = gdk_pixbuf_get_height (pb); 278 int h = gdk_pixbuf_get_height (pb);
211 int bpp = gdk_pixbuf_get_n_channels (pb); 279 int bpp = gdk_pixbuf_get_n_channels (pb);
212 int x, y, i; 280 int x, y, i;
… …
221 for (x = 0; x < w; x++) 289 for (x = 0; x < w; x++)
222 for (y = 0; y < h; y++) 290 for (y = 0; y < h; y++)
223 for (i = 0; i < 3; i++) 291 for (i = 0; i < 3; i++)
224 dst[x * 3 + y * dstr + i] = src[x * bpp + y * sstr + i]; 292 dst[x * 3 + y * dstr + i] = src[x * bpp + y * sstr + i];
225} 293}
294 perlinterp_acquire ();
226 OUTPUT: 295 OUTPUT:
227 RETVAL 296 RETVAL
228 297
229GdkPixbuf_noinc * 298GdkPixbuf_noinc *
230rotate (GdkPixbuf *pb, int angle) 299rotate (GdkPixbuf *pb, int angle)
231 CODE: 300 CODE:
301 perlinterp_release ();
302 if (angle < 0)
303 angle += 360;
232 RETVAL = gdk_pixbuf_rotate_simple (pb, angle == 0 ? GDK_PIXBUF_ROTATE_NONE 304 RETVAL = gdk_pixbuf_rotate_simple (pb, angle == 0 ? GDK_PIXBUF_ROTATE_NONE
233 : angle == 90 ? GDK_PIXBUF_ROTATE_COUNTERCLOCKWISE 305 : angle == 90 ? GDK_PIXBUF_ROTATE_COUNTERCLOCKWISE
234 : angle == 180 ? GDK_PIXBUF_ROTATE_UPSIDEDOWN 306 : angle == 180 ? GDK_PIXBUF_ROTATE_UPSIDEDOWN
235 : angle == 270 ? GDK_PIXBUF_ROTATE_CLOCKWISE 307 : angle == 270 ? GDK_PIXBUF_ROTATE_CLOCKWISE
236 : angle); 308 : angle);
309 perlinterp_acquire ();
237 OUTPUT: 310 OUTPUT:
238 RETVAL 311 RETVAL
239 312
240GdkPixbuf_noinc * 313GdkPixbuf_noinc *
241load_jpeg (SV *path, int thumbnail=0) 314decode_webp (SV *image_data, int thumbnail = 0, int iw = 0, int ih = 0)
315 CODE:
316{
317#if WEBP
318 guchar *data;
319 STRLEN data_size;
320 int alpha;
321 WebPDecoderConfig config;
322 int inw, inh;
323
324 data = SvPVbyte (image_data, data_size);
325
326 perlinterp_release ();
327
328 RETVAL = 0;
329
330 if (!WebPInitDecoderConfig (&config))
331 goto err;
332
333 config.options.use_threads = 1;
334
335 if (WebPGetFeatures (data, data_size, &config.input) != VP8_STATUS_OK)
336 goto err;
337
338 inw = config.input.width;
339 inh = config.input.height;
340
341 if (thumbnail)
342 {
343 if (inw * ih > inh * iw)
344 ih = (iw * inh + inw - 1) / inw;
345 else
346 iw = (ih * inw + inh - 1) / inh;
347
348 config.options.bypass_filtering = 1;
349 config.options.no_fancy_upsampling = 1;
350
351 config.options.use_scaling = 1;
352 config.options.scaled_width = iw;
353 config.options.scaled_height = ih;
354 }
355 else
356 {
357 iw = inw;
358 ih = inh;
359 }
360
361 alpha = config.input.has_alpha;
362
363 RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, !!alpha, 8, iw, ih);
364 if (!RETVAL)
365 goto err;
366
367 config.output.colorspace = alpha ? MODE_RGBA : MODE_RGB;
368 config.output.u.RGBA.rgba = gdk_pixbuf_get_pixels (RETVAL);
369 config.output.u.RGBA.stride = gdk_pixbuf_get_rowstride (RETVAL);
370 config.output.u.RGBA.size = gdk_pixbuf_get_byte_length (RETVAL);
371 config.output.is_external_memory = 1;
372
373 if (WebPDecode (data, data_size, &config) != VP8_STATUS_OK)
374 {
375 g_object_unref (RETVAL);
376 RETVAL = 0;
377 goto err;
378 }
379
380 err:
381 perlinterp_acquire ();
382#else
383 croak ("load_webp: webp not enabled at compile time");
384#endif
385}
386 OUTPUT:
387 RETVAL
388
389GdkPixbuf_noinc *
390load_jpeg (SV *path, int thumbnail = 0, int iw = 0, int ih = 0)
242 CODE: 391 CODE:
243{ 392{
244 struct jpeg_decompress_struct cinfo; 393 struct jpeg_decompress_struct cinfo;
245 struct jpg_err_mgr jerr; 394 struct jpg_err_mgr jerr;
246 guchar *data; 395 guchar *data;
… …
253 fp = fopen (SvPVbyte_nolen (path), "rb"); 402 fp = fopen (SvPVbyte_nolen (path), "rb");
254 403
255 if (!fp) 404 if (!fp)
256 XSRETURN_UNDEF; 405 XSRETURN_UNDEF;
257 406
407 perlinterp_release ();
408
258 cinfo.err = jpeg_std_error (&jerr.err); 409 cinfo.err = jpeg_std_error (&jerr.err);
259 410
260 jerr.err.error_exit = cv_error_exit; 411 jerr.err.error_exit = cv_error_exit;
261 jerr.err.output_message = cv_error_output; 412 jerr.err.output_message = cv_error_output;
262 413
… …
266 jpeg_destroy_decompress (&cinfo); 417 jpeg_destroy_decompress (&cinfo);
267 418
268 if (pb) 419 if (pb)
269 g_object_unref ((gpointer)pb); 420 g_object_unref ((gpointer)pb);
270 421
422 perlinterp_acquire ();
271 XSRETURN_UNDEF; 423 XSRETURN_UNDEF;
272 } 424 }
273 425
274 jpeg_create_decompress (&cinfo); 426 jpeg_create_decompress (&cinfo);
275 427
… …
291 { 443 {
292 cinfo.dct_method = JDCT_FASTEST; 444 cinfo.dct_method = JDCT_FASTEST;
293 cinfo.do_fancy_upsampling = FALSE; 445 cinfo.do_fancy_upsampling = FALSE;
294 446
295 while (cinfo.scale_denom < 8 447 while (cinfo.scale_denom < 8
296 && cinfo.output_width >= IW*4 448 && cinfo.output_width >= iw*4
297 && cinfo.output_height >= IH*4) 449 && cinfo.output_height >= ih*4)
298 { 450 {
299 cinfo.scale_denom <<= 1; 451 cinfo.scale_denom <<= 1;
300 jpeg_calc_output_dimensions (&cinfo); 452 jpeg_calc_output_dimensions (&cinfo);
301 } 453 }
302 } 454 }
303 455
456 if (cinfo.output_components != 3)
457 longjmp (jerr.setjmp_buffer, 3);
458
459 if (cinfo.jpeg_color_space == JCS_YCCK || cinfo.jpeg_color_space == JCS_CMYK)
460 {
461 cinfo.out_color_space = JCS_CMYK;
462 cinfo.output_components = 4;
463 }
464
304 pb = RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, cinfo.output_width, cinfo.output_height); 465 pb = RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, cinfo.output_components == 4, 8, cinfo.output_width, cinfo.output_height);
305 if (!RETVAL) 466 if (!RETVAL)
306 longjmp (jerr.setjmp_buffer, 2); 467 longjmp (jerr.setjmp_buffer, 2);
307 468
308 data = gdk_pixbuf_get_pixels (RETVAL); 469 data = gdk_pixbuf_get_pixels (RETVAL);
309 rs = gdk_pixbuf_get_rowstride (RETVAL); 470 rs = gdk_pixbuf_get_rowstride (RETVAL);
310
311 if (cinfo.output_components != 3)
312 longjmp (jerr.setjmp_buffer, 3);
313 471
314 jpeg_start_decompress (&cinfo); 472 jpeg_start_decompress (&cinfo);
315 473
316 while (cinfo.output_scanline < cinfo.output_height) 474 while (cinfo.output_scanline < cinfo.output_height)
317 { 475 {
… …
324 rp [3] = (guchar *)rp [2] + rs; 482 rp [3] = (guchar *)rp [2] + rs;
325 483
326 jpeg_read_scanlines (&cinfo, rp, remaining < 4 ? remaining : 4); 484 jpeg_read_scanlines (&cinfo, rp, remaining < 4 ? remaining : 4);
327 } 485 }
328 486
487 if (cinfo.out_color_space == JCS_CMYK)
488 {
489 guchar *end = data + cinfo.output_height * rs;
490
491 while (data < end)
492 {
493 U32 c = data [0];
494 U32 m = data [1];
495 U32 y = data [2];
496 U32 k = data [3];
497
498 if (0)
499 if (cinfo.Adobe_transform == 2)
500 {
501 c ^= 0xff;
502 m ^= 0xff;
503 y ^= 0xff;
504 k ^= 0xff;
505 }
506
507 data [0] = (c * k + 0x80) / 0xff;
508 data [1] = (m * k + 0x80) / 0xff;
509 data [2] = (y * k + 0x80) / 0xff;
510 data [3] = 0xff;
511
512 data += 4;
513 }
514 }
515
329 jpeg_finish_decompress (&cinfo); 516 jpeg_finish_decompress (&cinfo);
330 fclose (fp); 517 fclose (fp);
331 jpeg_destroy_decompress (&cinfo); 518 jpeg_destroy_decompress (&cinfo);
519 perlinterp_acquire ();
332} 520}
333 OUTPUT: 521 OUTPUT:
334 RETVAL 522 RETVAL
335 523
524void
525compare (GdkPixbuf *a, GdkPixbuf *b)
526 PPCODE:
527 perlinterp_release ();
528{
529 int w = gdk_pixbuf_get_width (a);
530 int h = gdk_pixbuf_get_height (a);
531
532 int sa = gdk_pixbuf_get_rowstride (a);
533 int sb = gdk_pixbuf_get_rowstride (b);
534
535 guchar *pa = gdk_pixbuf_get_pixels (a);
536 guchar *pb = gdk_pixbuf_get_pixels (b);
537
538 int x, y;
539
540 assert (w == gdk_pixbuf_get_width (b));
541 assert (h == gdk_pixbuf_get_height (b));
542
543 assert (gdk_pixbuf_get_n_channels (a) == 3);
544 assert (gdk_pixbuf_get_n_channels (b) == 3);
545
546 double diff = 0.;
547 int peak = 0;
548
549 if (w && h)
550 for (y = 0; y < h; y++)
551 {
552 guchar *pa_ = pa + y * sa;
553 guchar *pb_ = pb + y * sb;
554
555 for (x = 0; x < w; x++)
556 {
557 int d;
558
559 d = ((int)*pa_++) - ((int)*pb_++); diff += d*d; peak = MAX (peak, abs (d));
560 d = ((int)*pa_++) - ((int)*pb_++); diff += d*d; peak = MAX (peak, abs (d));
561 d = ((int)*pa_++) - ((int)*pb_++); diff += d*d; peak = MAX (peak, abs (d));
562 }
563 }
564
565 perlinterp_acquire ();
566
567 EXTEND (SP, 2);
568 PUSHs (sv_2mortal (newSVnv (sqrt (diff / (w * h * 3. * 255. * 255.)))));
569 PUSHs (sv_2mortal (newSVnv (peak / 255.)));
570}
571
336############################################################################# 572#############################################################################
337 573
338MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Schnauzer 574MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Schnauzer
575
576# currently only works for filenames (octet strings)
339 577
340SV * 578SV *
341foldcase (SV *pathsv) 579foldcase (SV *pathsv)
342 PROTOTYPE: $ 580 PROTOTYPE: $
343 CODE: 581 CODE:
344{ 582{
345 STRLEN plen; 583 STRLEN plen;
346 U8 *path = (U8 *)SvPVutf8 (pathsv, plen); 584 U8 *path = (U8 *)SvPV (pathsv, plen);
347 U8 *pend = path + plen; 585 U8 *pend = path + plen;
348 U8 dst [plen * 6 * 3], *dstp = dst; 586 U8 dst [plen * 6 * 3], *dstp = dst;
349 587
350 while (path < pend) 588 while (path < pend)
351 { 589 {
352 U8 ch = *path; 590 U8 ch = *path;
353 591
354 if (ch >= 'a' && ch <= 'z') 592 if (ch >= 'a' && ch <= 'z')
355 *dstp++ = *path++; 593 *dstp++ = *path++;
594 else if (ch >= 'A' && ch <= 'Z')
595 *dstp++ = *path++ + ('a' - 'A');
356 else if (ch >= '0' && ch <= '9') 596 else if (ch >= '0' && ch <= '9')
357 { 597 {
358 STRLEN el, nl = 0; 598 STRLEN el, nl = 0;
359 while (*path >= '0' && *path <= '9' && path < pend) 599 while (*path >= '0' && *path <= '9' && path < pend)
360 path++, nl++; 600 path++, nl++;
… …
363 *dstp++ = '0'; 603 *dstp++ = '0';
364 604
365 memcpy (dstp, path - nl, nl); 605 memcpy (dstp, path - nl, nl);
366 dstp += nl; 606 dstp += nl;
367 } 607 }
608 else
609 *dstp++ = *path++;
610#if 0
368 else 611 else
369 { 612 {
370 STRLEN cl; 613 STRLEN cl;
371 to_utf8_fold (path, dstp, &cl); 614 to_utf8_fold (path, dstp, &cl);
372 dstp += cl; 615 dstp += cl;
373 path += is_utf8_char (path); 616 path += is_utf8_char (path);
374 } 617 }
618#endif
375 } 619 }
376 620
377 RETVAL = newSVpvn ((const char *)dst, dstp - dst); 621 RETVAL = newSVpvn ((const char *)dst, dstp - dst);
378} 622}
379 OUTPUT: 623 OUTPUT:
… …
541############################################################################# 785#############################################################################
542 786
543MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Plugin::RCluster 787MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Plugin::RCluster
544 788
545SV * 789SV *
546make_histograms (SV *ar) 790extract_features (SV *ar)
547 CODE: 791 CODE:
548{ 792{
549 int i; 793 int i;
550 AV *av, *result; 794 AV *av, *result;
551 795
552 if (!SvROK (ar) || SvTYPE (SvRV (ar)) != SVt_PVAV) 796 if (!SvROK (ar) || SvTYPE (SvRV (ar)) != SVt_PVAV)
553 croak ("Not an array ref as first argument to make_histogram"); 797 croak ("Not an array ref as first argument to extract_features");
554 798
555 av = (AV *) SvRV (ar); 799 av = (AV *) SvRV (ar);
556 result = newAV (); 800 result = newAV ();
557 801
558 for (i = 0; i <= av_len (av); ++i) 802 for (i = 0; i <= av_len (av); ++i)
559 { 803 {
560 const int HISTSIZE = 64;
561
562 int j;
563 SV *sv = *av_fetch (av, i, 1); 804 SV *sv = *av_fetch (av, i, 1);
564 STRLEN len;
565 char *buf = SvPVbyte (sv, len);
566
567 int tmphist[HISTSIZE];
568 float *hist;
569
570 SV *histsv = newSV (HISTSIZE * sizeof (float) + 1); 805 SV *histsv = newSV (9 * sizeof (float) + 1);
806
571 SvPOK_on (histsv); 807 SvPOK_on (histsv);
572 SvCUR_set (histsv, HISTSIZE * sizeof (float)); 808 SvCUR_set (histsv, 9 * sizeof (float));
573 hist = (float *)SvPVX (histsv); 809 float *hist = (float *)SvPVX (histsv);
574 810
575 Zero (tmphist, sizeof (tmphist), char); 811 struct feature f_h, f_s, f_v;
812 feature_init (&f_h);
813 feature_init (&f_s);
814 feature_init (&f_v);
576 815
577 for (j = len; j--; )
578 {
579 unsigned int idx
580 = ((*buf & 0xc0) >> 2)
581 | ((*buf & 0x18) >> 1)
582 | (*buf & 0x03);
583
584 ++tmphist[idx];
585 ++buf;
586 }
587 816 {
588 for (j = 0; j < HISTSIZE; ++j) 817 STRLEN len;
589 hist[j] = (float)tmphist[j] / (len + 1e-30); 818 unsigned char *buf = (unsigned char *)SvPVbyte (sv, len);
819 while (len >= 3)
820 {
821 unsigned int r, g, b, h, s, v;
822 r = *buf++; g = *buf++; b = *buf++;
823 rgb_to_hsv (r, g, b, &h, &s, &v);
824
825 feature_update_pass_1 (&f_h, h);
826 feature_update_pass_1 (&f_s, s);
827 feature_update_pass_1 (&f_v, v);
828
829 len -= 3;
830 }
831
832 feature_finish_pass_1 (&f_h);
833 feature_finish_pass_1 (&f_s);
834 feature_finish_pass_1 (&f_v);
835 }
836
837 {
838 STRLEN len;
839 unsigned char *buf = (unsigned char *)SvPVbyte (sv, len);
840 while (len >= 3)
841 {
842 unsigned int r, g, b, h, s, v;
843 r = *buf++; g = *buf++; b = *buf++;
844 rgb_to_hsv (r, g, b, &h, &s, &v);
845
846 feature_update_pass_2 (&f_h, h);
847 feature_update_pass_2 (&f_s, s);
848 feature_update_pass_2 (&f_v, v);
849
850 len -= 3;
851 }
852
853 feature_finish_pass_2 (&f_h);
854 feature_finish_pass_2 (&f_s);
855 feature_finish_pass_2 (&f_v);
856 }
857
858 hist [0] = f_h.v1 * 2.; hist [1] = f_h.v2 * 2.; hist [2] = f_h.v3 * 2.;
859 hist [3] = f_s.v1 ; hist [4] = f_s.v2 ; hist [5] = f_s.v3 ;
860 hist [6] = f_v.v1 * .5; hist [7] = f_v.v2 * .5; hist [8] = f_v.v3 * .5;
590 861
591 av_push (result, histsv); 862 av_push (result, histsv);
592 } 863 }
593 864
594 RETVAL = newRV_noinc ((SV *)result); 865 RETVAL = newRV_noinc ((SV *)result);
595} 866}
596 OUTPUT: 867 OUTPUT:
597 RETVAL 868 RETVAL
598 869
599

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