[ViewVC] Diff of: cvs/CV/CV.xs

Comparing CV/CV.xs (file contents):
Revision 1.21 by root, Sat Jul 23 03:25:51 2005 UTC vs.
Revision 1.41 by root, Sat Mar 1 04:11:26 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
…		…
63		68
64	*h &= 255;	69	*h &= 255;
65	}	70	}
66	}	71	}
67		72
		73	struct feature {
		74	float v1, v2, v3; // mean, square, cube
		75	int n;
		76	};
		77
		78	static void
		79	feature_init (struct feature *f)
		80	{
		81	f->v1 = 0.;
		82	f->v2 = 0.;
		83	f->v3 = 0.;
		84	f->n = 0;
		85	}
		86
		87	// didn't find an algorithm to neatly do mean, variance and skew in one pass.
		88	// elmex ist schuld.
		89	static void
		90	feature_update_pass_1 (struct feature *f, unsigned int v)
		91	{
		92	f->v1 += v;
		93	f->n += 1;
		94	}
		95
		96	static void
		97	feature_finish_pass_1 (struct feature *f)
		98	{
		99	if (f->n < 1)
		100	return;
		101
		102	f->v1 /= f->n;
		103	}
		104
		105	static void
		106	feature_update_pass_2 (struct feature *f, unsigned int v)
		107	{
		108	float d = v - f->v1;
		109
		110	f->v2 += d * d;
		111	f->v3 += d * d * d;
		112	}
		113
		114	static void
		115	feature_finish_pass_2 (struct feature *f)
		116	{
		117	if (f->n < 1)
		118	return;
		119
		120	f->v2 /= f->n;
		121	f->v3 /= f->n;
		122
		123	f->v1 /= 255.;
		124	f->v2 /= 255. * 255.; f->v2 = sqrtf (f->v2);
		125	f->v3 /= 255. * 255. * 255.; f->v3 = powf (fabsf (f->v3), 1./3.);
		126	}
		127
68	static guint32 a85_val;	128	static guint32 a85_val;
69	static guint a85_cnt;	129	static guint a85_cnt;
70	static guchar a85_buf[LINELENGTH], *a85_ptr;	130	static guchar a85_buf[LINELENGTH], *a85_ptr;
71		131
72	static void	132	static void
…		…
124		184
125	MODULE = Gtk2::CV PACKAGE = Gtk2::CV	185	MODULE = Gtk2::CV PACKAGE = Gtk2::CV
126		186
127	PROTOTYPES: ENABLE	187	PROTOTYPES: ENABLE
128		188
		189	# missing function in perl. really :)
		190	int
		191	common_prefix_length (a, b)
		192	unsigned char a = (unsigned char )SvPVutf8_nolen ($arg);
		193	unsigned char b = (unsigned char )SvPVutf8_nolen ($arg);
		194	CODE:
		195	RETVAL = 0;
		196
		197	while (a == b && *a)
		198	{
		199	RETVAL += (*a & 0xc0) != 0x80;
		200	a++, b++;
		201	}
		202
		203	OUTPUT:
		204	RETVAL
		205
		206	const char *
		207	magic (const char *path)
		208	CODE:
		209	{
		210	static magic_t cookie;
		211
		212	if (!cookie)
		213	{
		214	cookie = magic_open (MAGIC_NONE);
		215
		216	if (cookie)
		217	magic_load (cookie, 0);
		218	else
		219	XSRETURN_UNDEF;
		220	}
		221
		222	RETVAL = magic_file (cookie, path);
		223	}
		224	OUTPUT:
		225	RETVAL
		226
		227	const char *
		228	magic_mime (const char *path)
		229	CODE:
		230	{
		231	static magic_t cookie;
		232
		233	if (!cookie)
		234	{
		235	cookie = magic_open (MAGIC_MIME);
		236
		237	if (cookie)
		238	magic_load (cookie, 0);
		239	else
		240	XSRETURN_UNDEF;
		241	}
		242
		243	RETVAL = magic_file (cookie, path);
		244	}
		245	OUTPUT:
		246	RETVAL
		247
		248	# missing/broken in Gtk2 perl module
		249
		250	void
		251	gdk_window_clear_hints (GdkWindow *window)
		252	CODE:
		253	gdk_window_set_geometry_hints (window, 0, 0);
		254
		255	gboolean
		256	gdk_net_wm_supports (GdkAtom property)
		257	CODE:
		258	#if defined(GDK_WINDOWING_X11) && !defined(GDK_MULTIHEAD_SAFE)
		259	RETVAL = gdk_net_wm_supports (property);
		260	#else
		261	RETVAL = 0;
		262	#endif
		263	OUTPUT:
		264	RETVAL
		265
129	GdkPixbuf_noinc *	266	GdkPixbuf_noinc *
130	transpose (GdkPixbuf *pb)	267	dealpha_expose (GdkPixbuf *pb)
131	CODE:	268	CODE:
132	{	269	{
133	int w = gdk_pixbuf_get_width (pb);	270	int w = gdk_pixbuf_get_width (pb);
134	int h = gdk_pixbuf_get_height (pb);	271	int h = gdk_pixbuf_get_height (pb);
135	int bpp = gdk_pixbuf_get_n_channels (pb);	272	int bpp = gdk_pixbuf_get_n_channels (pb);
136	int x, y, i;	273	int x, y, i;
137	guchar src = gdk_pixbuf_get_pixels (pb), dst;	274	guchar src = gdk_pixbuf_get_pixels (pb), dst;
138	int sstr = gdk_pixbuf_get_rowstride (pb), dstr;	275	int sstr = gdk_pixbuf_get_rowstride (pb), dstr;
139		276
140	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, bpp == 4, 8, h, w);	277	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h);
141		278
142	dst = gdk_pixbuf_get_pixels (RETVAL);	279	dst = gdk_pixbuf_get_pixels (RETVAL);
143	dstr = gdk_pixbuf_get_rowstride (RETVAL);	280	dstr = gdk_pixbuf_get_rowstride (RETVAL);
144		281
145	for (y = 0; y < h; y++)
146	for (x = 0; x < w; x++)	282	for (x = 0; x < w; x++)
		283	for (y = 0; y < h; y++)
147	for (i = 0; i < bpp; i++)	284	for (i = 0; i < 3; i++)
148	dst[y * bpp + x * dstr + i] = src[x * bpp + y * sstr + i];	285	dst[x * 3 + y * dstr + i] = src[x * bpp + y * sstr + i];
149	}	286	}
150	OUTPUT:	287	OUTPUT:
151	RETVAL	288	RETVAL
152		289
153	GdkPixbuf_noinc *	290	GdkPixbuf_noinc *
154	flop (GdkPixbuf *pb)	291	rotate (GdkPixbuf *pb, int angle)
155	CODE:	292	CODE:
156	{	293	RETVAL = gdk_pixbuf_rotate_simple (pb, angle == 0 ? GDK_PIXBUF_ROTATE_NONE
157	int w = gdk_pixbuf_get_width (pb);	294	: angle == 90 ? GDK_PIXBUF_ROTATE_COUNTERCLOCKWISE
158	int h = gdk_pixbuf_get_height (pb);	295	: angle == 180 ? GDK_PIXBUF_ROTATE_UPSIDEDOWN
159	int bpp = gdk_pixbuf_get_n_channels (pb);	296	: angle == 270 ? GDK_PIXBUF_ROTATE_CLOCKWISE
160	int x, y, i;	297	: angle);
161	guchar src = gdk_pixbuf_get_pixels (pb), dst;
162	int sstr = gdk_pixbuf_get_rowstride (pb), dstr;
163
164	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, bpp == 4, 8, w, h);
165
166	dst = gdk_pixbuf_get_pixels (RETVAL);
167	dstr = gdk_pixbuf_get_rowstride (RETVAL);
168
169	for (y = 0; y < h; y++)
170	for (x = 0; x < w; x++)
171	for (i = 0; i < bpp; i++)
172	dst[(w - 1 - x) * bpp + y * dstr + i] = src[x * bpp + y * sstr + i];
173	}
174	OUTPUT:	298	OUTPUT:
175	RETVAL	299	RETVAL
176		300
177	GdkPixbuf_noinc *	301	GdkPixbuf_noinc *
178	load_jpeg (char *path, int thumbnail=0)	302	load_jpeg (SV *path, int thumbnail=0)
179	CODE:	303	CODE:
180	{	304	{
181	struct jpeg_decompress_struct cinfo;	305	struct jpeg_decompress_struct cinfo;
182	struct jpg_err_mgr jerr;	306	struct jpg_err_mgr jerr;
183	guchar *data;	307	guchar *data;
184	int rs;	308	int rs;
185	FILE *fp;	309	FILE *fp;
186	volatile GdkPixbuf *pb = 0;	310	volatile GdkPixbuf *pb = 0;
		311
187	RETVAL = 0;	312	RETVAL = 0;
188		313
189	if (!(fp = fopen (path, "rb")))	314	fp = fopen (SvPVbyte_nolen (path), "rb");
		315
		316	if (!fp)
190	XSRETURN_UNDEF;	317	XSRETURN_UNDEF;
191		318
192	cinfo.err = jpeg_std_error (&jerr.err);	319	cinfo.err = jpeg_std_error (&jerr.err);
193		320
194	jerr.err.error_exit = cv_error_exit;	321	jerr.err.error_exit = cv_error_exit;
…		…
265	jpeg_destroy_decompress (&cinfo);	392	jpeg_destroy_decompress (&cinfo);
266	}	393	}
267	OUTPUT:	394	OUTPUT:
268	RETVAL	395	RETVAL
269		396
		397	void
		398	compare (GdkPixbuf a, GdkPixbuf b)
		399	PPCODE:
		400	{
		401	int w = gdk_pixbuf_get_width (a);
		402	int h = gdk_pixbuf_get_height (a);
		403	int sa = gdk_pixbuf_get_rowstride (a);
		404	int sb = gdk_pixbuf_get_rowstride (b);
		405
		406	guchar *pa = gdk_pixbuf_get_pixels (a);
		407	guchar *pb = gdk_pixbuf_get_pixels (b);
		408
		409	int x, y;
		410
		411	assert (w == gdk_pixbuf_get_width (b));
		412	assert (h == gdk_pixbuf_get_height (b));
		413
		414	assert (gdk_pixbuf_get_n_channels (a) == 3);
		415	assert (gdk_pixbuf_get_n_channels (b) == 3);
		416
		417	double diff = 0.;
		418	int peak = 0;
		419
		420	if (w && h)
		421	for (y = 0; y < h; y++)
		422	{
		423	guchar pa_ = pa + y sa;
		424	guchar pb_ = pb + y sb;
		425
		426	for (x = 0; x < w; x++)
		427	{
		428	int d;
		429
		430	d = ((int)pa_++) - ((int)pb_++); diff += d*d; peak = MAX (peak, abs (d));
		431	d = ((int)pa_++) - ((int)pb_++); diff += d*d; peak = MAX (peak, abs (d));
		432	d = ((int)pa_++) - ((int)pb_++); diff += d*d; peak = MAX (peak, abs (d));
		433	}
		434	}
		435
		436	EXTEND (SP, 2);
		437	PUSHs (sv_2mortal (newSVnv (sqrt (diff / (w * h * 3. * 255. * 255.)))));
		438	PUSHs (sv_2mortal (newSVnv (peak / 255.)));
		439	}
		440
270	#############################################################################	441	#############################################################################
271		442
272	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Schnauzer	443	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Schnauzer
		444
		445	# currently only works for filenames (octet strings)
273		446
274	SV *	447	SV *
275	foldcase (SV *pathsv)	448	foldcase (SV *pathsv)
276	PROTOTYPE: $	449	PROTOTYPE: $
277	CODE:	450	CODE:
278	{	451	{
279	STRLEN plen;	452	STRLEN plen;
280	U8 *path = SvPVutf8 (pathsv, plen);	453	U8 path = (U8 )SvPV (pathsv, plen);
281	U8 *pend = path + plen;	454	U8 *pend = path + plen;
282	U8 dst [plen * 6 * 3], *dstp = dst;	455	U8 dst [plen * 6 * 3], *dstp = dst;
283		456
284	while (path < pend)	457	while (path < pend)
285	{	458	{
286	U8 ch = *path;	459	U8 ch = *path;
287		460
288	if (ch >= 'a' && ch <= 'z')	461	if (ch >= 'a' && ch <= 'z')
289	dstp++ = path++;	462	dstp++ = path++;
		463	else if (ch >= 'A' && ch <= 'Z')
		464	dstp++ = path++ + ('a' - 'A');
290	else if (ch >= '0' && ch <= '9')	465	else if (ch >= '0' && ch <= '9')
291	{	466	{
292	STRLEN el, nl = 0;	467	STRLEN el, nl = 0;
293	while (path >= '0' && path <= '9' && path < pend)	468	while (path >= '0' && path <= '9' && path < pend)
294	path++, nl++;	469	path++, nl++;
…		…
297	*dstp++ = '0';	472	*dstp++ = '0';
298		473
299	memcpy (dstp, path - nl, nl);	474	memcpy (dstp, path - nl, nl);
300	dstp += nl;	475	dstp += nl;
301	}	476	}
		477	else
		478	dstp++ = path++;
		479	#if 0
302	else	480	else
303	{	481	{
304	STRLEN cl;	482	STRLEN cl;
305	to_utf8_fold (path, dstp, &cl);	483	to_utf8_fold (path, dstp, &cl);
306	dstp += cl;	484	dstp += cl;
307	path += is_utf8_char (path);	485	path += is_utf8_char (path);
308	}	486	}
		487	#endif
309	}	488	}
310		489
311	RETVAL = newSVpvn (dst, dstp - dst);	490	RETVAL = newSVpvn ((const char *)dst, dstp - dst);
312	}	491	}
313	OUTPUT:	492	OUTPUT:
314	RETVAL	493	RETVAL
315		494
316	GdkPixbuf_noinc *	495	GdkPixbuf_noinc *
317	p7_to_pb (int w, int h, guchar *src)	496	p7_to_pb (int w, int h, SV *src_sv)
318	PROTOTYPE: @	497	PROTOTYPE: @
319	CODE:	498	CODE:
320	{	499	{
321	int x, y;	500	int x, y;
322	guchar dst, d;	501	guchar dst, d;
323	int dstr;	502	int dstr;
		503	guchar src = (guchar )SvPVbyte_nolen (src_sv);
324		504
325	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h);	505	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h);
326	dst = gdk_pixbuf_get_pixels (RETVAL);	506	dst = gdk_pixbuf_get_pixels (RETVAL);
327	dstr = gdk_pixbuf_get_rowstride (RETVAL);	507	dstr = gdk_pixbuf_get_rowstride (RETVAL);
328		508
…		…
337	}	517	}
338	}	518	}
339	OUTPUT:	519	OUTPUT:
340	RETVAL	520	RETVAL
341		521
		522	#############################################################################
		523
		524	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::PostScript
		525
		526	void
		527	dump_ascii85 (PerlIO fp, GdkPixbuf pb)
		528	CODE:
		529	{
		530	int w = gdk_pixbuf_get_width (pb);
		531	int h = gdk_pixbuf_get_height (pb);
		532	int x, y, i;
		533	guchar *dst;
		534	int bpp = gdk_pixbuf_get_n_channels (pb);
		535	guchar *src = gdk_pixbuf_get_pixels (pb);
		536	int sstr = gdk_pixbuf_get_rowstride (pb);
		537
		538	a85_init ();
		539
		540	for (y = 0; y < h; y++)
		541	for (x = 0; x < w; x++)
		542	for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
		543	a85_push (fp, src [x * bpp + y * sstr + i]);
		544
		545	a85_finish (fp);
		546	}
		547
		548	void
		549	dump_binary (PerlIO fp, GdkPixbuf pb)
		550	CODE:
		551	{
		552	int w = gdk_pixbuf_get_width (pb);
		553	int h = gdk_pixbuf_get_height (pb);
		554	int x, y, i;
		555	guchar *dst;
		556	int bpp = gdk_pixbuf_get_n_channels (pb);
		557	guchar *src = gdk_pixbuf_get_pixels (pb);
		558	int sstr = gdk_pixbuf_get_rowstride (pb);
		559
		560	for (y = 0; y < h; y++)
		561	for (x = 0; x < w; x++)
		562	for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
		563	PerlIO_putc (fp, src [x * bpp + y * sstr + i]);
		564	}
		565
		566	#############################################################################
		567
		568	MODULE = Gtk2::CV PACKAGE = Gtk2::CV
		569
342	SV *	570	SV *
343	pb_to_p7 (GdkPixbuf *pb)	571	pb_to_hv84 (GdkPixbuf *pb)
344	CODE:	572	CODE:
345	{	573	{
346	int w = gdk_pixbuf_get_width (pb);	574	int w = gdk_pixbuf_get_width (pb);
347	int h = gdk_pixbuf_get_height (pb);	575	int h = gdk_pixbuf_get_height (pb);
348	int x, y;	576	int x, y;
349	guchar *dst;	577	guchar *dst;
350	int bpp = gdk_pixbuf_get_n_channels (pb);	578	int bpp = gdk_pixbuf_get_n_channels (pb);
351	guchar *src = gdk_pixbuf_get_pixels (pb);	579	guchar *src = gdk_pixbuf_get_pixels (pb);
352	int sstr = gdk_pixbuf_get_rowstride (pb);	580	int sstr = gdk_pixbuf_get_rowstride (pb);
353	int Er[IW], Eg[IW], Eb[IW];
354	int seed = 77;
355
356	RETVAL = newSV (w * h);
357	SvPOK_only (RETVAL);
358	SvCUR_set (RETVAL, w * h);
359
360	dst = SvPVX (RETVAL);
361
362	memset (Er, 0, sizeof (int) * IW);
363	memset (Eg, 0, sizeof (int) * IW);
364	memset (Eb, 0, sizeof (int) * IW);
365
366	/* some primitive error distribution + random dithering */
367
368	for (y = 0; y < h; y++)
369	{
370	int er = 0, eg = 0, eb = 0;
371
372	for (x = 0; x < w; x++)
373	{
374	int r, g, b;
375	guchar p = src + x bpp + y * sstr;
376
377	r = ((p[0] + er + Er[x]) * 7 + (RAND & 127) + 64) / 255;
378	g = ((p[1] + eg + Eg[x]) * 7 + (RAND & 127) + 64) / 255;
379	b = ((p[2] + eb + Eb[x]) * 3 + (RAND & 127) + 64) / 255;
380
381	r = r > 7 ? 7 : r < 0 ? 0 : r;
382	g = g > 7 ? 7 : g < 0 ? 0 : g;
383	b = b > 3 ? 3 : b < 0 ? 0 : b;
384
385	er += p[0] - (r * 255 + 4) / 7;
386	eg += p[1] - (g * 255 + 4) / 7;
387	eb += p[2] - (b * 255 + 2) / 3;
388
389	Er[x] = er >> 1; er -= (er + 1) >> 1;
390	Eg[x] = eg >> 1; eg -= (eg + 1) >> 1;
391	Eb[x] = eb >> 1; eb -= (eb + 1) >> 1;
392
393	*dst++ = r << 5 \| g << 2 \| b;
394	}
395	}
396	}
397	OUTPUT:
398	RETVAL
399
400	#############################################################################
401
402	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::PostScript
403
404	void
405	dump_ascii85 (PerlIO fp, GdkPixbuf pb)
406	CODE:
407	{
408	int w = gdk_pixbuf_get_width (pb);
409	int h = gdk_pixbuf_get_height (pb);
410	int x, y, i;
411	guchar *dst;
412	int bpp = gdk_pixbuf_get_n_channels (pb);
413	guchar *src = gdk_pixbuf_get_pixels (pb);
414	int sstr = gdk_pixbuf_get_rowstride (pb);
415
416	a85_init ();
417
418	for (y = 0; y < h; y++)
419	for (x = 0; x < w; x++)
420	for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
421	a85_push (fp, src [x * bpp + y * sstr + i]);
422
423	a85_finish (fp);
424	}
425
426	void
427	dump_binary (PerlIO fp, GdkPixbuf pb)
428	CODE:
429	{
430	int w = gdk_pixbuf_get_width (pb);
431	int h = gdk_pixbuf_get_height (pb);
432	int x, y, i;
433	guchar *dst;
434	int bpp = gdk_pixbuf_get_n_channels (pb);
435	guchar *src = gdk_pixbuf_get_pixels (pb);
436	int sstr = gdk_pixbuf_get_rowstride (pb);
437
438	for (y = 0; y < h; y++)
439	for (x = 0; x < w; x++)
440	for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
441	PerlIO_putc (fp, src [x * bpp + y * sstr + i]);
442	}
443
444	#############################################################################
445
446	MODULE = Gtk2::CV PACKAGE = Gtk2::CV
447
448	SV *
449	pb_to_hv84 (GdkPixbuf *pb)
450	CODE:
451	{
452	int w = gdk_pixbuf_get_width (pb);
453	int h = gdk_pixbuf_get_height (pb);
454	int x, y;
455	guchar *dst;
456	int bpp = gdk_pixbuf_get_n_channels (pb);
457	guchar *src = gdk_pixbuf_get_pixels (pb);
458	int sstr = gdk_pixbuf_get_rowstride (pb);
459		581
460	RETVAL = newSV (6 * 8 * 12 / 8);	582	RETVAL = newSV (6 * 8 * 12 / 8);
461	SvPOK_only (RETVAL);	583	SvPOK_only (RETVAL);
462	SvCUR_set (RETVAL, 6 * 8 * 12 / 8);	584	SvCUR_set (RETVAL, 6 * 8 * 12 / 8);
463		585
464	dst = SvPVX (RETVAL);	586	dst = (guchar *)SvPVX (RETVAL);
465		587
466	/* some primitive error distribution + random dithering */	588	/* some primitive error distribution + random dithering */
467		589
468	for (y = 0; y < h; y++)	590	for (y = 0; y < h; y++)
469	{	591	{
…		…
532	#############################################################################	654	#############################################################################
533		655
534	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Plugin::RCluster	656	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Plugin::RCluster
535		657
536	SV *	658	SV *
537	make_histograms (SV *ar)	659	extract_features (SV *ar)
538	CODE:	660	CODE:
539	{	661	{
540	int i;	662	int i;
541	AV av, result;	663	AV av, result;
542		664
543	if (!SvROK (ar) \|\| SvTYPE (SvRV (ar)) != SVt_PVAV)	665	if (!SvROK (ar) \|\| SvTYPE (SvRV (ar)) != SVt_PVAV)
544	croak ("Not an array ref as first argument to make_histogram");	666	croak ("Not an array ref as first argument to extract_features");
545		667
546	av = (AV *) SvRV (ar);	668	av = (AV *) SvRV (ar);
547	result = newAV ();	669	result = newAV ();
548		670
549	for (i = 0; i <= av_len (av); ++i)	671	for (i = 0; i <= av_len (av); ++i)
550	{	672	{
551	const int HISTSIZE = 64;
552
553	int j;
554	SV sv = av_fetch (av, i, 1);	673	SV sv = av_fetch (av, i, 1);
555	STRLEN len;
556	char *buf = SvPVbyte (sv, len);
557
558	int tmphist[HISTSIZE];
559	float *hist;
560
561	SV histsv = newSV (HISTSIZE sizeof (float) + 1);	674	SV histsv = newSV (9 sizeof (float) + 1);
		675
562	SvPOK_on (histsv);	676	SvPOK_on (histsv);
563	SvCUR_set (histsv, HISTSIZE * sizeof (float));	677	SvCUR_set (histsv, 9 * sizeof (float));
564	hist = (float *)SvPVX (histsv);	678	float hist = (float )SvPVX (histsv);
565		679
566	Zero (tmphist, sizeof (tmphist), char);	680	struct feature f_h, f_s, f_v;
		681	feature_init (&f_h);
		682	feature_init (&f_s);
		683	feature_init (&f_v);
567		684
568	for (j = len; j--; )
569	{
570	unsigned int idx
571	= ((*buf & 0xc0) >> 2)
572	\| ((*buf & 0x18) >> 1)
573	\| (*buf & 0x03);
574
575	++tmphist[idx];
576	++buf;
577	}
578		685	{
579	for (j = 0; j < HISTSIZE; ++j)	686	STRLEN len;
580	hist[j] = (float)tmphist[j] / (len + 1e-30);	687	unsigned char buf = (unsigned char )SvPVbyte (sv, len);
		688	while (len >= 3)
		689	{
		690	unsigned int r, g, b, h, s, v;
		691	r = buf++; g = buf++; b = *buf++;
		692	rgb_to_hsv (r, g, b, &h, &s, &v);
		693
		694	feature_update_pass_1 (&f_h, h);
		695	feature_update_pass_1 (&f_s, s);
		696	feature_update_pass_1 (&f_v, v);
		697
		698	len -= 3;
		699	}
		700
		701	feature_finish_pass_1 (&f_h);
		702	feature_finish_pass_1 (&f_s);
		703	feature_finish_pass_1 (&f_v);
		704	}
		705
		706	{
		707	STRLEN len;
		708	unsigned char buf = (unsigned char )SvPVbyte (sv, len);
		709	while (len >= 3)
		710	{
		711	unsigned int r, g, b, h, s, v;
		712	r = buf++; g = buf++; b = *buf++;
		713	rgb_to_hsv (r, g, b, &h, &s, &v);
		714
		715	feature_update_pass_2 (&f_h, h);
		716	feature_update_pass_2 (&f_s, s);
		717	feature_update_pass_2 (&f_v, v);
		718
		719	len -= 3;
		720	}
		721
		722	feature_finish_pass_2 (&f_h);
		723	feature_finish_pass_2 (&f_s);
		724	feature_finish_pass_2 (&f_v);
		725	}
		726
		727	hist [0] = f_h.v1 * 2.; hist [1] = f_h.v2 * 2.; hist [2] = f_h.v3 * 2.;
		728	hist [3] = f_s.v1 ; hist [4] = f_s.v2 ; hist [5] = f_s.v3 ;
		729	hist [6] = f_v.v1 * .5; hist [7] = f_v.v2 * .5; hist [8] = f_v.v3 * .5;
581		730
582	av_push (result, histsv);	731	av_push (result, histsv);
583	}	732	}
584		733
585	RETVAL = newRV_noinc ((SV *)result);	734	RETVAL = newRV_noinc ((SV *)result);
586	}	735	}
587	OUTPUT:	736	OUTPUT:
588	RETVAL	737	RETVAL
589		738
590

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Comparing CV/CV.xs (file contents): Revision 1.21 by root, Sat Jul 23 03:25:51 2005 UTC vs. Revision 1.41 by root, Sat Mar 1 04:11:26 2008 UTC

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Comparing CV/CV.xs (file contents):
Revision 1.21 by root, Sat Jul 23 03:25:51 2005 UTC vs.
Revision 1.41 by root, Sat Mar 1 04:11:26 2008 UTC