[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 1.43 by root, Sun May 3 08:16:47 2009 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
		19	#include <assert.h>
		20
14	#define IW 80 /* MUST match Schnauer.pm! */	21	#define IW 80 /* MUST match Schnauzer.pm! */
15	#define IH 60 /* MUST match Schnauer.pm! */	22	#define IH 60 /* MUST match Schnauzer.pm! */
16		23
17	#define RAND (seed = (seed + 7141) * 54773 % 134456)	24	#define RAND (seed = (seed + 7141) * 54773 % 134456)
18		25
19	#define LINELENGTH 240	26	#define LINELENGTH 240
20		27
21	#define ELLIPSIS "\xe2\x80\xa6"	28	#define ELLIPSIS "\xe2\x80\xa6"
		29
		30	typedef char *octet_string;
22		31
23	struct jpg_err_mgr	32	struct jpg_err_mgr
24	{	33	{
25	struct jpeg_error_mgr err;	34	struct jpeg_error_mgr err;
26	jmp_buf setjmp_buffer;	35	jmp_buf setjmp_buffer;
…		…
63		72
64	*h &= 255;	73	*h &= 255;
65	}	74	}
66	}	75	}
67		76
		77	struct feature {
		78	float v1, v2, v3; // mean, square, cube
		79	int n;
		80	};
		81
		82	static void
		83	feature_init (struct feature *f)
		84	{
		85	f->v1 = 0.;
		86	f->v2 = 0.;
		87	f->v3 = 0.;
		88	f->n = 0;
		89	}
		90
		91	// didn't find an algorithm to neatly do mean, variance and skew in one pass.
		92	// elmex ist schuld.
		93	static void
		94	feature_update_pass_1 (struct feature *f, unsigned int v)
		95	{
		96	f->v1 += v;
		97	f->n += 1;
		98	}
		99
		100	static void
		101	feature_finish_pass_1 (struct feature *f)
		102	{
		103	if (f->n < 1)
		104	return;
		105
		106	f->v1 /= f->n;
		107	}
		108
		109	static void
		110	feature_update_pass_2 (struct feature *f, unsigned int v)
		111	{
		112	float d = v - f->v1;
		113
		114	f->v2 += d * d;
		115	f->v3 += d * d * d;
		116	}
		117
		118	static void
		119	feature_finish_pass_2 (struct feature *f)
		120	{
		121	if (f->n < 1)
		122	return;
		123
		124	f->v2 /= f->n;
		125	f->v3 /= f->n;
		126
		127	f->v1 /= 255.;
		128	f->v2 /= 255. * 255.; f->v2 = sqrtf (f->v2);
		129	f->v3 /= 255. * 255. * 255.; f->v3 = powf (fabsf (f->v3), 1./3.);
		130	}
		131
68	static guint32 a85_val;	132	static guint32 a85_val;
69	static guint a85_cnt;	133	static guint a85_cnt;
70	static guchar a85_buf[LINELENGTH], *a85_ptr;	134	static guchar a85_buf[LINELENGTH], *a85_ptr;
71		135
72	static void	136	static void
…		…
124		188
125	MODULE = Gtk2::CV PACKAGE = Gtk2::CV	189	MODULE = Gtk2::CV PACKAGE = Gtk2::CV
126		190
127	PROTOTYPES: ENABLE	191	PROTOTYPES: ENABLE
128		192
		193	# missing function in perl. really :)
		194	int
		195	common_prefix_length (a, b)
		196	unsigned char a = (unsigned char )SvPVutf8_nolen ($arg);
		197	unsigned char b = (unsigned char )SvPVutf8_nolen ($arg);
		198	CODE:
		199	RETVAL = 0;
		200
		201	while (a == b && *a)
		202	{
		203	RETVAL += (*a & 0xc0) != 0x80;
		204	a++, b++;
		205	}
		206
		207	OUTPUT:
		208	RETVAL
		209
		210	const char *
		211	magic (octet_string path)
		212	CODE:
		213	{
		214	static magic_t cookie;
		215
		216	if (!cookie)
		217	{
		218	cookie = magic_open (MAGIC_NONE);
		219
		220	if (cookie)
		221	magic_load (cookie, 0);
		222	else
		223	XSRETURN_UNDEF;
		224	}
		225
		226	RETVAL = magic_file (cookie, path);
		227	}
		228	OUTPUT:
		229	RETVAL
		230
		231	const char *
		232	magic_mime (octet_string path)
		233	CODE:
		234	{
		235	static magic_t cookie;
		236
		237	if (!cookie)
		238	{
		239	cookie = magic_open (MAGIC_MIME);
		240
		241	if (cookie)
		242	magic_load (cookie, 0);
		243	else
		244	XSRETURN_UNDEF;
		245	}
		246
		247	RETVAL = magic_file (cookie, path);
		248	}
		249	OUTPUT:
		250	RETVAL
		251
		252	# missing/broken in Gtk2 perl module
		253
		254	void
		255	gdk_window_clear_hints (GdkWindow *window)
		256	CODE:
		257	gdk_window_set_geometry_hints (window, 0, 0);
		258
		259	gboolean
		260	gdk_net_wm_supports (GdkAtom property)
		261	CODE:
		262	#if defined(GDK_WINDOWING_X11) && !defined(GDK_MULTIHEAD_SAFE)
		263	RETVAL = gdk_net_wm_supports (property);
		264	#else
		265	RETVAL = 0;
		266	#endif
		267	OUTPUT:
		268	RETVAL
		269
129	GdkPixbuf_noinc *	270	GdkPixbuf_noinc *
130	transpose (GdkPixbuf *pb)	271	dealpha_expose (GdkPixbuf *pb)
131	CODE:	272	CODE:
132	{	273	{
133	int w = gdk_pixbuf_get_width (pb);	274	int w = gdk_pixbuf_get_width (pb);
134	int h = gdk_pixbuf_get_height (pb);	275	int h = gdk_pixbuf_get_height (pb);
135	int bpp = gdk_pixbuf_get_n_channels (pb);	276	int bpp = gdk_pixbuf_get_n_channels (pb);
136	int x, y, i;	277	int x, y, i;
137	guchar src = gdk_pixbuf_get_pixels (pb), dst;	278	guchar src = gdk_pixbuf_get_pixels (pb), dst;
138	int sstr = gdk_pixbuf_get_rowstride (pb), dstr;	279	int sstr = gdk_pixbuf_get_rowstride (pb), dstr;
139		280
140	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, bpp == 4, 8, h, w);	281	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h);
141		282
142	dst = gdk_pixbuf_get_pixels (RETVAL);	283	dst = gdk_pixbuf_get_pixels (RETVAL);
143	dstr = gdk_pixbuf_get_rowstride (RETVAL);	284	dstr = gdk_pixbuf_get_rowstride (RETVAL);
144		285
145	for (y = 0; y < h; y++)
146	for (x = 0; x < w; x++)	286	for (x = 0; x < w; x++)
		287	for (y = 0; y < h; y++)
147	for (i = 0; i < bpp; i++)	288	for (i = 0; i < 3; i++)
148	dst[y * bpp + x * dstr + i] = src[x * bpp + y * sstr + i];	289	dst[x * 3 + y * dstr + i] = src[x * bpp + y * sstr + i];
149	}	290	}
150	OUTPUT:	291	OUTPUT:
151	RETVAL	292	RETVAL
152		293
153	GdkPixbuf_noinc *	294	GdkPixbuf_noinc *
154	flop (GdkPixbuf *pb)	295	rotate (GdkPixbuf *pb, int angle)
155	CODE:	296	CODE:
156	{	297	RETVAL = gdk_pixbuf_rotate_simple (pb, angle == 0 ? GDK_PIXBUF_ROTATE_NONE
157	int w = gdk_pixbuf_get_width (pb);	298	: angle == 90 ? GDK_PIXBUF_ROTATE_COUNTERCLOCKWISE
158	int h = gdk_pixbuf_get_height (pb);	299	: angle == 180 ? GDK_PIXBUF_ROTATE_UPSIDEDOWN
159	int bpp = gdk_pixbuf_get_n_channels (pb);	300	: angle == 270 ? GDK_PIXBUF_ROTATE_CLOCKWISE
160	int x, y, i;	301	: 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:	302	OUTPUT:
175	RETVAL	303	RETVAL
176		304
177	GdkPixbuf_noinc *	305	GdkPixbuf_noinc *
178	load_jpeg (char *path, int thumbnail=0)	306	load_jpeg (SV *path, int thumbnail=0)
179	CODE:	307	CODE:
180	{	308	{
181	struct jpeg_decompress_struct cinfo;	309	struct jpeg_decompress_struct cinfo;
182	struct jpg_err_mgr jerr;	310	struct jpg_err_mgr jerr;
183	guchar *data;	311	guchar *data;
184	int rs;	312	int rs;
185	FILE *fp;	313	FILE *fp;
186	volatile GdkPixbuf *pb = 0;	314	volatile GdkPixbuf *pb = 0;
		315
187	RETVAL = 0;	316	RETVAL = 0;
188		317
189	if (!(fp = fopen (path, "rb")))	318	fp = fopen (SvPVbyte_nolen (path), "rb");
		319
		320	if (!fp)
190	XSRETURN_UNDEF;	321	XSRETURN_UNDEF;
191		322
192	cinfo.err = jpeg_std_error (&jerr.err);	323	cinfo.err = jpeg_std_error (&jerr.err);
193		324
194	jerr.err.error_exit = cv_error_exit;	325	jerr.err.error_exit = cv_error_exit;
…		…
265	jpeg_destroy_decompress (&cinfo);	396	jpeg_destroy_decompress (&cinfo);
266	}	397	}
267	OUTPUT:	398	OUTPUT:
268	RETVAL	399	RETVAL
269		400
		401	void
		402	compare (GdkPixbuf a, GdkPixbuf b)
		403	PPCODE:
		404	{
		405	int w = gdk_pixbuf_get_width (a);
		406	int h = gdk_pixbuf_get_height (a);
		407
		408	int sa = gdk_pixbuf_get_rowstride (a);
		409	int sb = gdk_pixbuf_get_rowstride (b);
		410
		411	guchar *pa = gdk_pixbuf_get_pixels (a);
		412	guchar *pb = gdk_pixbuf_get_pixels (b);
		413
		414	int x, y;
		415
		416	assert (w == gdk_pixbuf_get_width (b));
		417	assert (h == gdk_pixbuf_get_height (b));
		418
		419	assert (gdk_pixbuf_get_n_channels (a) == 3);
		420	assert (gdk_pixbuf_get_n_channels (b) == 3);
		421
		422	double diff = 0.;
		423	int peak = 0;
		424
		425	if (w && h)
		426	for (y = 0; y < h; y++)
		427	{
		428	guchar pa_ = pa + y sa;
		429	guchar pb_ = pb + y sb;
		430
		431	for (x = 0; x < w; x++)
		432	{
		433	int d;
		434
		435	d = ((int)pa_++) - ((int)pb_++); diff += d*d; peak = MAX (peak, abs (d));
		436	d = ((int)pa_++) - ((int)pb_++); diff += d*d; peak = MAX (peak, abs (d));
		437	d = ((int)pa_++) - ((int)pb_++); diff += d*d; peak = MAX (peak, abs (d));
		438	}
		439	}
		440
		441	EXTEND (SP, 2);
		442	PUSHs (sv_2mortal (newSVnv (sqrt (diff / (w * h * 3. * 255. * 255.)))));
		443	PUSHs (sv_2mortal (newSVnv (peak / 255.)));
		444	}
		445
270	#############################################################################	446	#############################################################################
271		447
272	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Schnauzer	448	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Schnauzer
		449
		450	# currently only works for filenames (octet strings)
273		451
274	SV *	452	SV *
275	foldcase (SV *pathsv)	453	foldcase (SV *pathsv)
276	PROTOTYPE: $	454	PROTOTYPE: $
277	CODE:	455	CODE:
278	{	456	{
279	STRLEN plen;	457	STRLEN plen;
280	U8 *path = SvPVutf8 (pathsv, plen);	458	U8 path = (U8 )SvPV (pathsv, plen);
281	U8 *pend = path + plen;	459	U8 *pend = path + plen;
282	U8 dst [plen * 6 * 3], *dstp = dst;	460	U8 dst [plen * 6 * 3], *dstp = dst;
283		461
284	while (path < pend)	462	while (path < pend)
285	{	463	{
286	U8 ch = *path;	464	U8 ch = *path;
287		465
288	if (ch >= 'a' && ch <= 'z')	466	if (ch >= 'a' && ch <= 'z')
289	dstp++ = path++;	467	dstp++ = path++;
		468	else if (ch >= 'A' && ch <= 'Z')
		469	dstp++ = path++ + ('a' - 'A');
290	else if (ch >= '0' && ch <= '9')	470	else if (ch >= '0' && ch <= '9')
291	{	471	{
292	STRLEN el, nl = 0;	472	STRLEN el, nl = 0;
293	while (path >= '0' && path <= '9' && path < pend)	473	while (path >= '0' && path <= '9' && path < pend)
294	path++, nl++;	474	path++, nl++;
…		…
297	*dstp++ = '0';	477	*dstp++ = '0';
298		478
299	memcpy (dstp, path - nl, nl);	479	memcpy (dstp, path - nl, nl);
300	dstp += nl;	480	dstp += nl;
301	}	481	}
		482	else
		483	dstp++ = path++;
		484	#if 0
302	else	485	else
303	{	486	{
304	STRLEN cl;	487	STRLEN cl;
305	to_utf8_fold (path, dstp, &cl);	488	to_utf8_fold (path, dstp, &cl);
306	dstp += cl;	489	dstp += cl;
307	path += is_utf8_char (path);	490	path += is_utf8_char (path);
308	}	491	}
		492	#endif
309	}	493	}
310		494
311	RETVAL = newSVpvn (dst, dstp - dst);	495	RETVAL = newSVpvn ((const char *)dst, dstp - dst);
312	}	496	}
313	OUTPUT:	497	OUTPUT:
314	RETVAL	498	RETVAL
315		499
316	GdkPixbuf_noinc *	500	GdkPixbuf_noinc *
317	p7_to_pb (int w, int h, guchar *src)	501	p7_to_pb (int w, int h, SV *src_sv)
318	PROTOTYPE: @	502	PROTOTYPE: @
319	CODE:	503	CODE:
320	{	504	{
321	int x, y;	505	int x, y;
322	guchar dst, d;	506	guchar dst, d;
323	int dstr;	507	int dstr;
		508	guchar src = (guchar )SvPVbyte_nolen (src_sv);
324		509
325	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h);	510	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h);
326	dst = gdk_pixbuf_get_pixels (RETVAL);	511	dst = gdk_pixbuf_get_pixels (RETVAL);
327	dstr = gdk_pixbuf_get_rowstride (RETVAL);	512	dstr = gdk_pixbuf_get_rowstride (RETVAL);
328		513
…		…
337	}	522	}
338	}	523	}
339	OUTPUT:	524	OUTPUT:
340	RETVAL	525	RETVAL
341		526
		527	#############################################################################
		528
		529	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::PostScript
		530
		531	void
		532	dump_ascii85 (PerlIO fp, GdkPixbuf pb)
		533	CODE:
		534	{
		535	int w = gdk_pixbuf_get_width (pb);
		536	int h = gdk_pixbuf_get_height (pb);
		537	int x, y, i;
		538	guchar *dst;
		539	int bpp = gdk_pixbuf_get_n_channels (pb);
		540	guchar *src = gdk_pixbuf_get_pixels (pb);
		541	int sstr = gdk_pixbuf_get_rowstride (pb);
		542
		543	a85_init ();
		544
		545	for (y = 0; y < h; y++)
		546	for (x = 0; x < w; x++)
		547	for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
		548	a85_push (fp, src [x * bpp + y * sstr + i]);
		549
		550	a85_finish (fp);
		551	}
		552
		553	void
		554	dump_binary (PerlIO fp, GdkPixbuf pb)
		555	CODE:
		556	{
		557	int w = gdk_pixbuf_get_width (pb);
		558	int h = gdk_pixbuf_get_height (pb);
		559	int x, y, i;
		560	guchar *dst;
		561	int bpp = gdk_pixbuf_get_n_channels (pb);
		562	guchar *src = gdk_pixbuf_get_pixels (pb);
		563	int sstr = gdk_pixbuf_get_rowstride (pb);
		564
		565	for (y = 0; y < h; y++)
		566	for (x = 0; x < w; x++)
		567	for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
		568	PerlIO_putc (fp, src [x * bpp + y * sstr + i]);
		569	}
		570
		571	#############################################################################
		572
		573	MODULE = Gtk2::CV PACKAGE = Gtk2::CV
		574
342	SV *	575	SV *
343	pb_to_p7 (GdkPixbuf *pb)	576	pb_to_hv84 (GdkPixbuf *pb)
344	CODE:	577	CODE:
345	{	578	{
346	int w = gdk_pixbuf_get_width (pb);	579	int w = gdk_pixbuf_get_width (pb);
347	int h = gdk_pixbuf_get_height (pb);	580	int h = gdk_pixbuf_get_height (pb);
348	int x, y;	581	int x, y;
349	guchar *dst;	582	guchar *dst;
350	int bpp = gdk_pixbuf_get_n_channels (pb);	583	int bpp = gdk_pixbuf_get_n_channels (pb);
351	guchar *src = gdk_pixbuf_get_pixels (pb);	584	guchar *src = gdk_pixbuf_get_pixels (pb);
352	int sstr = gdk_pixbuf_get_rowstride (pb);	585	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		586
460	RETVAL = newSV (6 * 8 * 12 / 8);	587	RETVAL = newSV (6 * 8 * 12 / 8);
461	SvPOK_only (RETVAL);	588	SvPOK_only (RETVAL);
462	SvCUR_set (RETVAL, 6 * 8 * 12 / 8);	589	SvCUR_set (RETVAL, 6 * 8 * 12 / 8);
463		590
464	dst = SvPVX (RETVAL);	591	dst = (guchar *)SvPVX (RETVAL);
465		592
466	/* some primitive error distribution + random dithering */	593	/* some primitive error distribution + random dithering */
467		594
468	for (y = 0; y < h; y++)	595	for (y = 0; y < h; y++)
469	{	596	{
…		…
532	#############################################################################	659	#############################################################################
533		660
534	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Plugin::RCluster	661	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Plugin::RCluster
535		662
536	SV *	663	SV *
537	make_histograms (SV *ar)	664	extract_features (SV *ar)
538	CODE:	665	CODE:
539	{	666	{
540	int i;	667	int i;
541	AV av, result;	668	AV av, result;
542		669
543	if (!SvROK (ar) \|\| SvTYPE (SvRV (ar)) != SVt_PVAV)	670	if (!SvROK (ar) \|\| SvTYPE (SvRV (ar)) != SVt_PVAV)
544	croak ("Not an array ref as first argument to make_histogram");	671	croak ("Not an array ref as first argument to extract_features");
545		672
546	av = (AV *) SvRV (ar);	673	av = (AV *) SvRV (ar);
547	result = newAV ();	674	result = newAV ();
548		675
549	for (i = 0; i <= av_len (av); ++i)	676	for (i = 0; i <= av_len (av); ++i)
550	{	677	{
551	const int HISTSIZE = 64;
552
553	int j;
554	SV sv = av_fetch (av, i, 1);	678	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);	679	SV histsv = newSV (9 sizeof (float) + 1);
		680
562	SvPOK_on (histsv);	681	SvPOK_on (histsv);
563	SvCUR_set (histsv, HISTSIZE * sizeof (float));	682	SvCUR_set (histsv, 9 * sizeof (float));
564	hist = (float *)SvPVX (histsv);	683	float hist = (float )SvPVX (histsv);
565		684
566	Zero (tmphist, sizeof (tmphist), char);	685	struct feature f_h, f_s, f_v;
		686	feature_init (&f_h);
		687	feature_init (&f_s);
		688	feature_init (&f_v);
567		689
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		690	{
579	for (j = 0; j < HISTSIZE; ++j)	691	STRLEN len;
580	hist[j] = (float)tmphist[j] / (len + 1e-30);	692	unsigned char buf = (unsigned char )SvPVbyte (sv, len);
		693	while (len >= 3)
		694	{
		695	unsigned int r, g, b, h, s, v;
		696	r = buf++; g = buf++; b = *buf++;
		697	rgb_to_hsv (r, g, b, &h, &s, &v);
		698
		699	feature_update_pass_1 (&f_h, h);
		700	feature_update_pass_1 (&f_s, s);
		701	feature_update_pass_1 (&f_v, v);
		702
		703	len -= 3;
		704	}
		705
		706	feature_finish_pass_1 (&f_h);
		707	feature_finish_pass_1 (&f_s);
		708	feature_finish_pass_1 (&f_v);
		709	}
		710
		711	{
		712	STRLEN len;
		713	unsigned char buf = (unsigned char )SvPVbyte (sv, len);
		714	while (len >= 3)
		715	{
		716	unsigned int r, g, b, h, s, v;
		717	r = buf++; g = buf++; b = *buf++;
		718	rgb_to_hsv (r, g, b, &h, &s, &v);
		719
		720	feature_update_pass_2 (&f_h, h);
		721	feature_update_pass_2 (&f_s, s);
		722	feature_update_pass_2 (&f_v, v);
		723
		724	len -= 3;
		725	}
		726
		727	feature_finish_pass_2 (&f_h);
		728	feature_finish_pass_2 (&f_s);
		729	feature_finish_pass_2 (&f_v);
		730	}
		731
		732	hist [0] = f_h.v1 * 2.; hist [1] = f_h.v2 * 2.; hist [2] = f_h.v3 * 2.;
		733	hist [3] = f_s.v1 ; hist [4] = f_s.v2 ; hist [5] = f_s.v3 ;
		734	hist [6] = f_v.v1 * .5; hist [7] = f_v.v2 * .5; hist [8] = f_v.v3 * .5;
581		735
582	av_push (result, histsv);	736	av_push (result, histsv);
583	}	737	}
584		738
585	RETVAL = newRV_noinc ((SV *)result);	739	RETVAL = newRV_noinc ((SV *)result);
586	}	740	}
587	OUTPUT:	741	OUTPUT:
588	RETVAL	742	RETVAL
589		743
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 1.43 by root, Sun May 3 08:16:47 2009 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 1.43 by root, Sun May 3 08:16:47 2009 UTC