[deliverable/linux.git] / drivers / media / video / pvrusb2 / pvrusb2-std.c

/*
 *
 *  $Id$
 *
 *  Copyright (C) 2005 Mike Isely <isely@pobox.com>
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 */

#include "pvrusb2-std.h"
#include "pvrusb2-debug.h"
#include <asm/string.h>
#include <linux/slab.h>

struct std_name {
	const char *name;
	v4l2_std_id id;
};


#define CSTD_PAL \
	(V4L2_STD_PAL_B| \
	 V4L2_STD_PAL_B1| \
	 V4L2_STD_PAL_G| \
	 V4L2_STD_PAL_H| \
	 V4L2_STD_PAL_I| \
	 V4L2_STD_PAL_D| \
	 V4L2_STD_PAL_D1| \
	 V4L2_STD_PAL_K| \
	 V4L2_STD_PAL_M| \
	 V4L2_STD_PAL_N| \
	 V4L2_STD_PAL_Nc| \
	 V4L2_STD_PAL_60)

#define CSTD_NTSC \
	(V4L2_STD_NTSC_M| \
	 V4L2_STD_NTSC_M_JP| \
	 V4L2_STD_NTSC_M_KR| \
	 V4L2_STD_NTSC_443)

#define CSTD_SECAM \
	(V4L2_STD_SECAM_B| \
	 V4L2_STD_SECAM_D| \
	 V4L2_STD_SECAM_G| \
	 V4L2_STD_SECAM_H| \
	 V4L2_STD_SECAM_K| \
	 V4L2_STD_SECAM_K1| \
	 V4L2_STD_SECAM_L| \
	 V4L2_STD_SECAM_LC)

#define TSTD_B   (V4L2_STD_PAL_B|V4L2_STD_SECAM_B)
#define TSTD_B1  (V4L2_STD_PAL_B1)
#define TSTD_D   (V4L2_STD_PAL_D|V4L2_STD_SECAM_D)
#define TSTD_D1  (V4L2_STD_PAL_D1)
#define TSTD_G   (V4L2_STD_PAL_G|V4L2_STD_SECAM_G)
#define TSTD_H   (V4L2_STD_PAL_H|V4L2_STD_SECAM_H)
#define TSTD_I   (V4L2_STD_PAL_I)
#define TSTD_K   (V4L2_STD_PAL_K|V4L2_STD_SECAM_K)
#define TSTD_K1  (V4L2_STD_SECAM_K1)
#define TSTD_L   (V4L2_STD_SECAM_L)
#define TSTD_M   (V4L2_STD_PAL_M|V4L2_STD_NTSC_M)
#define TSTD_N   (V4L2_STD_PAL_N)
#define TSTD_Nc  (V4L2_STD_PAL_Nc)
#define TSTD_60  (V4L2_STD_PAL_60)

#define CSTD_ALL (CSTD_PAL|CSTD_NTSC|CSTD_SECAM)

/* Mapping of standard bits to color system */
static const struct std_name std_groups[] = {
	{"PAL",CSTD_PAL},
	{"NTSC",CSTD_NTSC},
	{"SECAM",CSTD_SECAM},
};

/* Mapping of standard bits to modulation system */
static const struct std_name std_items[] = {
	{"B",TSTD_B},
	{"B1",TSTD_B1},
	{"D",TSTD_D},
	{"D1",TSTD_D1},
	{"G",TSTD_G},
	{"H",TSTD_H},
	{"I",TSTD_I},
	{"K",TSTD_K},
	{"K1",TSTD_K1},
	{"L",TSTD_L},
	{"LC",V4L2_STD_SECAM_LC},
	{"M",TSTD_M},
	{"Mj",V4L2_STD_NTSC_M_JP},
	{"443",V4L2_STD_NTSC_443},
	{"Mk",V4L2_STD_NTSC_M_KR},
	{"N",TSTD_N},
	{"Nc",TSTD_Nc},
	{"60",TSTD_60},
};


// Search an array of std_name structures and return a pointer to the
// element with the matching name.
static const struct std_name *find_std_name(const struct std_name *arrPtr,
					    unsigned int arrSize,
					    const char *bufPtr,
					    unsigned int bufSize)
{
	unsigned int idx;
	const struct std_name *p;
	for (idx = 0; idx < arrSize; idx++) {
		p = arrPtr + idx;
		if (strlen(p->name) != bufSize) continue;
		if (!memcmp(bufPtr,p->name,bufSize)) return p;
	}
	return NULL;
}


int pvr2_std_str_to_id(v4l2_std_id *idPtr,const char *bufPtr,
		       unsigned int bufSize)
{
	v4l2_std_id id = 0;
	v4l2_std_id cmsk = 0;
	v4l2_std_id t;
	int mMode = 0;
	unsigned int cnt;
	char ch;
	const struct std_name *sp;

	while (bufSize) {
		if (!mMode) {
			cnt = 0;
			while ((cnt < bufSize) && (bufPtr[cnt] != '-')) cnt++;
			if (cnt >= bufSize) return 0; // No more characters
			sp = find_std_name(std_groups, ARRAY_SIZE(std_groups),
					   bufPtr,cnt);
			if (!sp) return 0; // Illegal color system name
			cnt++;
			bufPtr += cnt;
			bufSize -= cnt;
			mMode = !0;
			cmsk = sp->id;
			continue;
		}
		cnt = 0;
		while (cnt < bufSize) {
			ch = bufPtr[cnt];
			if (ch == ';') {
				mMode = 0;
				break;
			}
			if (ch == '/') break;
			cnt++;
		}
		sp = find_std_name(std_items, ARRAY_SIZE(std_items),
				   bufPtr,cnt);
		if (!sp) return 0; // Illegal modulation system ID
		t = sp->id & cmsk;
		if (!t) return 0; // Specific color + modulation system illegal
		id |= t;
		if (cnt < bufSize) cnt++;
		bufPtr += cnt;
		bufSize -= cnt;
	}

	if (idPtr) *idPtr = id;
	return !0;
}


unsigned int pvr2_std_id_to_str(char *bufPtr, unsigned int bufSize,
				v4l2_std_id id)
{
	unsigned int idx1,idx2;
	const struct std_name *ip,*gp;
	int gfl,cfl;
	unsigned int c1,c2;
	cfl = 0;
	c1 = 0;
	for (idx1 = 0; idx1 < ARRAY_SIZE(std_groups); idx1++) {
		gp = std_groups + idx1;
		gfl = 0;
		for (idx2 = 0; idx2 < ARRAY_SIZE(std_items); idx2++) {
			ip = std_items + idx2;
			if (!(gp->id & ip->id & id)) continue;
			if (!gfl) {
				if (cfl) {
					c2 = scnprintf(bufPtr,bufSize,";");
					c1 += c2;
					bufSize -= c2;
					bufPtr += c2;
				}
				cfl = !0;
				c2 = scnprintf(bufPtr,bufSize,
					       "%s-",gp->name);
				gfl = !0;
			} else {
				c2 = scnprintf(bufPtr,bufSize,"/");
			}
			c1 += c2;
			bufSize -= c2;
			bufPtr += c2;
			c2 = scnprintf(bufPtr,bufSize,
				       ip->name);
			c1 += c2;
			bufSize -= c2;
			bufPtr += c2;
		}
	}
	return c1;
}


// Template data for possible enumerated video standards.  Here we group
// standards which share common frame rates and resolution.
static struct v4l2_standard generic_standards[] = {
	{
		.id             = (TSTD_B|TSTD_B1|
				   TSTD_D|TSTD_D1|
				   TSTD_G|
				   TSTD_H|
				   TSTD_I|
				   TSTD_K|TSTD_K1|
				   TSTD_L|
				   V4L2_STD_SECAM_LC |
				   TSTD_N|TSTD_Nc),
		.frameperiod    =
		{
			.numerator  = 1,
			.denominator= 25
		},
		.framelines     = 625,
		.reserved       = {0,0,0,0}
	}, {
		.id             = (TSTD_M|
				   V4L2_STD_NTSC_M_JP|
				   V4L2_STD_NTSC_M_KR),
		.frameperiod    =
		{
			.numerator  = 1001,
			.denominator= 30000
		},
		.framelines     = 525,
		.reserved       = {0,0,0,0}
	}, { // This is a total wild guess
		.id             = (TSTD_60),
		.frameperiod    =
		{
			.numerator  = 1001,
			.denominator= 30000
		},
		.framelines     = 525,
		.reserved       = {0,0,0,0}
	}, { // This is total wild guess
		.id             = V4L2_STD_NTSC_443,
		.frameperiod    =
		{
			.numerator  = 1001,
			.denominator= 30000
		},
		.framelines     = 525,
		.reserved       = {0,0,0,0}
	}
};

#define generic_standards_cnt ARRAY_SIZE(generic_standards)

static struct v4l2_standard *match_std(v4l2_std_id id)
{
	unsigned int idx;
	for (idx = 0; idx < generic_standards_cnt; idx++) {
		if (generic_standards[idx].id & id) {
			return generic_standards + idx;
		}
	}
	return NULL;
}

static int pvr2_std_fill(struct v4l2_standard *std,v4l2_std_id id)
{
	struct v4l2_standard *template;
	int idx;
	unsigned int bcnt;
	template = match_std(id);
	if (!template) return 0;
	idx = std->index;
	memcpy(std,template,sizeof(*template));
	std->index = idx;
	std->id = id;
	bcnt = pvr2_std_id_to_str(std->name,sizeof(std->name)-1,id);
	std->name[bcnt] = 0;
	pvr2_trace(PVR2_TRACE_STD,"Set up standard idx=%u name=%s",
		   std->index,std->name);
	return !0;
}

/* These are special cases of combined standards that we should enumerate
   separately if the component pieces are present. */
static v4l2_std_id std_mixes[] = {
	V4L2_STD_PAL_B | V4L2_STD_PAL_G,
	V4L2_STD_PAL_D | V4L2_STD_PAL_K,
	V4L2_STD_SECAM_B | V4L2_STD_SECAM_G,
	V4L2_STD_SECAM_D | V4L2_STD_SECAM_K,
};

struct v4l2_standard *pvr2_std_create_enum(unsigned int *countptr,
					   v4l2_std_id id)
{
	unsigned int std_cnt = 0;
	unsigned int idx,bcnt,idx2;
	v4l2_std_id idmsk,cmsk,fmsk;
	struct v4l2_standard *stddefs;

	if (pvrusb2_debug & PVR2_TRACE_STD) {
		char buf[50];
		bcnt = pvr2_std_id_to_str(buf,sizeof(buf),id);
		pvr2_trace(
			PVR2_TRACE_STD,"Mapping standards mask=0x%x (%.*s)",
			(int)id,bcnt,buf);
	}

	*countptr = 0;
	std_cnt = 0;
	fmsk = 0;
	for (idmsk = 1, cmsk = id; cmsk; idmsk <<= 1) {
		if (!(idmsk & cmsk)) continue;
		cmsk &= ~idmsk;
		if (match_std(idmsk)) {
			std_cnt++;
			continue;
		}
		fmsk |= idmsk;
	}

	for (idx2 = 0; idx2 < ARRAY_SIZE(std_mixes); idx2++) {
		if ((id & std_mixes[idx2]) == std_mixes[idx2]) std_cnt++;
	}

	if (fmsk) {
		char buf[50];
		bcnt = pvr2_std_id_to_str(buf,sizeof(buf),fmsk);
		pvr2_trace(
			PVR2_TRACE_ERROR_LEGS,
			"WARNING:"
			" Failed to classify the following standard(s): %.*s",
			bcnt,buf);
	}

	pvr2_trace(PVR2_TRACE_STD,"Setting up %u unique standard(s)",
		   std_cnt);
	if (!std_cnt) return NULL; // paranoia

	stddefs = kzalloc(sizeof(struct v4l2_standard) * std_cnt,
			  GFP_KERNEL);
	for (idx = 0; idx < std_cnt; idx++) stddefs[idx].index = idx;

	idx = 0;

	/* Enumerate potential special cases */
	for (idx2 = 0; (idx2 < ARRAY_SIZE(std_mixes)) && (idx < std_cnt);
	     idx2++) {
		if (!(id & std_mixes[idx2])) continue;
		if (pvr2_std_fill(stddefs+idx,std_mixes[idx2])) idx++;
	}
	/* Now enumerate individual pieces */
	for (idmsk = 1, cmsk = id; cmsk && (idx < std_cnt); idmsk <<= 1) {
		if (!(idmsk & cmsk)) continue;
		cmsk &= ~idmsk;
		if (!pvr2_std_fill(stddefs+idx,idmsk)) continue;
		idx++;
	}

	*countptr = std_cnt;
	return stddefs;
}

v4l2_std_id pvr2_std_get_usable(void)
{
	return CSTD_ALL;
}


/*
  Stuff for Emacs to see, in order to encourage consistent editing style:
  *** Local Variables: ***
  *** mode: c ***
  *** fill-column: 75 ***
  *** tab-width: 8 ***
  *** c-basic-offset: 8 ***
  *** End: ***
  */
Commit	Line	Data
d855497e MI	1	/*
	2	*
	3	* $Id$
	4	*
	5	* Copyright (C) 2005 Mike Isely <isely@pobox.com>
	6	*
	7	* This program is free software; you can redistribute it and/or modify
	8	* it under the terms of the GNU General Public License as published by
	9	* the Free Software Foundation; either version 2 of the License
	10	*
	11	* This program is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	* GNU General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU General Public License
	17	* along with this program; if not, write to the Free Software
	18	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	19	*
	20	*/
	21
	22	#include "pvrusb2-std.h"
	23	#include "pvrusb2-debug.h"
b2bbaa93 MI	24	#include <asm/string.h>
b2bbaa93 MI	25	#include <linux/slab.h>
d855497e MI	26
	27	struct std_name {
	28	const char *name;
	29	v4l2_std_id id;
	30	};
	31
	32
	33	#define CSTD_PAL \
	34	(V4L2_STD_PAL_B\| \
	35	V4L2_STD_PAL_B1\| \
	36	V4L2_STD_PAL_G\| \
	37	V4L2_STD_PAL_H\| \
	38	V4L2_STD_PAL_I\| \
	39	V4L2_STD_PAL_D\| \
	40	V4L2_STD_PAL_D1\| \
	41	V4L2_STD_PAL_K\| \
	42	V4L2_STD_PAL_M\| \
	43	V4L2_STD_PAL_N\| \
	44	V4L2_STD_PAL_Nc\| \
	45	V4L2_STD_PAL_60)
	46
	47	#define CSTD_NTSC \
	48	(V4L2_STD_NTSC_M\| \
	49	V4L2_STD_NTSC_M_JP\| \
	50	V4L2_STD_NTSC_M_KR\| \
	51	V4L2_STD_NTSC_443)
	52
	53	#define CSTD_SECAM \
	54	(V4L2_STD_SECAM_B\| \
	55	V4L2_STD_SECAM_D\| \
	56	V4L2_STD_SECAM_G\| \
	57	V4L2_STD_SECAM_H\| \
	58	V4L2_STD_SECAM_K\| \
	59	V4L2_STD_SECAM_K1\| \
	60	V4L2_STD_SECAM_L\| \
	61	V4L2_STD_SECAM_LC)
	62
	63	#define TSTD_B (V4L2_STD_PAL_B\|V4L2_STD_SECAM_B)
	64	#define TSTD_B1 (V4L2_STD_PAL_B1)
	65	#define TSTD_D (V4L2_STD_PAL_D\|V4L2_STD_SECAM_D)
	66	#define TSTD_D1 (V4L2_STD_PAL_D1)
	67	#define TSTD_G (V4L2_STD_PAL_G\|V4L2_STD_SECAM_G)
	68	#define TSTD_H (V4L2_STD_PAL_H\|V4L2_STD_SECAM_H)
	69	#define TSTD_I (V4L2_STD_PAL_I)
	70	#define TSTD_K (V4L2_STD_PAL_K\|V4L2_STD_SECAM_K)
	71	#define TSTD_K1 (V4L2_STD_SECAM_K1)
	72	#define TSTD_L (V4L2_STD_SECAM_L)
	73	#define TSTD_M (V4L2_STD_PAL_M\|V4L2_STD_NTSC_M)
	74	#define TSTD_N (V4L2_STD_PAL_N)
	75	#define TSTD_Nc (V4L2_STD_PAL_Nc)
	76	#define TSTD_60 (V4L2_STD_PAL_60)
	77
	78	#define CSTD_ALL (CSTD_PAL\|CSTD_NTSC\|CSTD_SECAM)
	79
	80	/* Mapping of standard bits to color system */
c5a69d57	81	static const struct std_name std_groups[] = {
d855497e MI	82	{"PAL",CSTD_PAL},
	83	{"NTSC",CSTD_NTSC},
	84	{"SECAM",CSTD_SECAM},
	85	};
	86
	87	/* Mapping of standard bits to modulation system */
c5a69d57	88	static const struct std_name std_items[] = {
d855497e MI	89	{"B",TSTD_B},
	90	{"B1",TSTD_B1},
	91	{"D",TSTD_D},
	92	{"D1",TSTD_D1},
	93	{"G",TSTD_G},
	94	{"H",TSTD_H},
	95	{"I",TSTD_I},
	96	{"K",TSTD_K},
	97	{"K1",TSTD_K1},
	98	{"L",TSTD_L},
	99	{"LC",V4L2_STD_SECAM_LC},
	100	{"M",TSTD_M},
	101	{"Mj",V4L2_STD_NTSC_M_JP},
	102	{"443",V4L2_STD_NTSC_443},
	103	{"Mk",V4L2_STD_NTSC_M_KR},
	104	{"N",TSTD_N},
	105	{"Nc",TSTD_Nc},
	106	{"60",TSTD_60},
	107	};
	108
	109
	110	// Search an array of std_name structures and return a pointer to the
	111	// element with the matching name.
	112	static const struct std_name find_std_name(const struct std_name arrPtr,
	113	unsigned int arrSize,
	114	const char *bufPtr,
	115	unsigned int bufSize)
	116	{
	117	unsigned int idx;
	118	const struct std_name *p;
	119	for (idx = 0; idx < arrSize; idx++) {
	120	p = arrPtr + idx;
	121	if (strlen(p->name) != bufSize) continue;
	122	if (!memcmp(bufPtr,p->name,bufSize)) return p;
	123	}
a0fd1cb1	124	return NULL;
d855497e MI	125	}
	126
	127
	128	int pvr2_std_str_to_id(v4l2_std_id idPtr,const char bufPtr,
	129	unsigned int bufSize)
	130	{
	131	v4l2_std_id id = 0;
	132	v4l2_std_id cmsk = 0;
	133	v4l2_std_id t;
	134	int mMode = 0;
	135	unsigned int cnt;
	136	char ch;
	137	const struct std_name *sp;
	138
	139	while (bufSize) {
	140	if (!mMode) {
	141	cnt = 0;
	142	while ((cnt < bufSize) && (bufPtr[cnt] != '-')) cnt++;
	143	if (cnt >= bufSize) return 0; // No more characters
eca8ebfc AD	144	sp = find_std_name(std_groups, ARRAY_SIZE(std_groups),
eca8ebfc AD	145	bufPtr,cnt);
d855497e MI	146	if (!sp) return 0; // Illegal color system name
	147	cnt++;
	148	bufPtr += cnt;
	149	bufSize -= cnt;
	150	mMode = !0;
	151	cmsk = sp->id;
	152	continue;
	153	}
	154	cnt = 0;
	155	while (cnt < bufSize) {
	156	ch = bufPtr[cnt];
	157	if (ch == ';') {
	158	mMode = 0;
	159	break;
	160	}
	161	if (ch == '/') break;
	162	cnt++;
	163	}
eca8ebfc	164	sp = find_std_name(std_items, ARRAY_SIZE(std_items),
d855497e MI	165	bufPtr,cnt);
	166	if (!sp) return 0; // Illegal modulation system ID
	167	t = sp->id & cmsk;
	168	if (!t) return 0; // Specific color + modulation system illegal
	169	id \|= t;
	170	if (cnt < bufSize) cnt++;
	171	bufPtr += cnt;
	172	bufSize -= cnt;
	173	}
	174
	175	if (idPtr) *idPtr = id;
	176	return !0;
	177	}
	178
	179
	180	unsigned int pvr2_std_id_to_str(char *bufPtr, unsigned int bufSize,
	181	v4l2_std_id id)
	182	{
	183	unsigned int idx1,idx2;
	184	const struct std_name ip,gp;
	185	int gfl,cfl;
	186	unsigned int c1,c2;
	187	cfl = 0;
	188	c1 = 0;
eca8ebfc	189	for (idx1 = 0; idx1 < ARRAY_SIZE(std_groups); idx1++) {
d855497e MI	190	gp = std_groups + idx1;
d855497e MI	191	gfl = 0;
eca8ebfc	192	for (idx2 = 0; idx2 < ARRAY_SIZE(std_items); idx2++) {
d855497e MI	193	ip = std_items + idx2;
	194	if (!(gp->id & ip->id & id)) continue;
	195	if (!gfl) {
	196	if (cfl) {
	197	c2 = scnprintf(bufPtr,bufSize,";");
	198	c1 += c2;
	199	bufSize -= c2;
	200	bufPtr += c2;
	201	}
	202	cfl = !0;
	203	c2 = scnprintf(bufPtr,bufSize,
	204	"%s-",gp->name);
	205	gfl = !0;
	206	} else {
	207	c2 = scnprintf(bufPtr,bufSize,"/");
	208	}
	209	c1 += c2;
	210	bufSize -= c2;
	211	bufPtr += c2;
	212	c2 = scnprintf(bufPtr,bufSize,
	213	ip->name);
	214	c1 += c2;
	215	bufSize -= c2;
	216	bufPtr += c2;
	217	}
	218	}
	219	return c1;
	220	}
	221
	222
	223	// Template data for possible enumerated video standards. Here we group
	224	// standards which share common frame rates and resolution.
	225	static struct v4l2_standard generic_standards[] = {
	226	{
	227	.id = (TSTD_B\|TSTD_B1\|
	228	TSTD_D\|TSTD_D1\|
	229	TSTD_G\|
	230	TSTD_H\|
	231	TSTD_I\|
	232	TSTD_K\|TSTD_K1\|
	233	TSTD_L\|
	234	V4L2_STD_SECAM_LC \|
	235	TSTD_N\|TSTD_Nc),
	236	.frameperiod =
	237	{
	238	.numerator = 1,
	239	.denominator= 25
	240	},
	241	.framelines = 625,
	242	.reserved = {0,0,0,0}
	243	}, {
	244	.id = (TSTD_M\|
	245	V4L2_STD_NTSC_M_JP\|
	246	V4L2_STD_NTSC_M_KR),
	247	.frameperiod =
	248	{
	249	.numerator = 1001,
	250	.denominator= 30000
	251	},
	252	.framelines = 525,
	253	.reserved = {0,0,0,0}
	254	}, { // This is a total wild guess
	255	.id = (TSTD_60),
	256	.frameperiod =
257	{
258	.numerator = 1001,
259	.denominator= 30000
260	},
261	.framelines = 525,
262	.reserved = {0,0,0,0}
263	}, { // This is total wild guess
264	.id = V4L2_STD_NTSC_443,
265	.frameperiod =
266	{
267	.numerator = 1001,
268	.denominator= 30000
269	},
270	.framelines = 525,
271	.reserved = {0,0,0,0}
272	}
273	};
274
eca8ebfc	275	#define generic_standards_cnt ARRAY_SIZE(generic_standards)
d855497e MI	276
	277	static struct v4l2_standard *match_std(v4l2_std_id id)
	278	{
	279	unsigned int idx;
	280	for (idx = 0; idx < generic_standards_cnt; idx++) {
	281	if (generic_standards[idx].id & id) {
	282	return generic_standards + idx;
	283	}
	284	}
a0fd1cb1	285	return NULL;
d855497e MI	286	}
	287
	288	static int pvr2_std_fill(struct v4l2_standard *std,v4l2_std_id id)
	289	{
	290	struct v4l2_standard *template;
	291	int idx;
	292	unsigned int bcnt;
	293	template = match_std(id);
	294	if (!template) return 0;
	295	idx = std->index;
	296	memcpy(std,template,sizeof(*template));
	297	std->index = idx;
	298	std->id = id;
	299	bcnt = pvr2_std_id_to_str(std->name,sizeof(std->name)-1,id);
	300	std->name[bcnt] = 0;
56585386	301	pvr2_trace(PVR2_TRACE_STD,"Set up standard idx=%u name=%s",
d855497e MI	302	std->index,std->name);
	303	return !0;
	304	}
	305
	306	/* These are special cases of combined standards that we should enumerate
	307	separately if the component pieces are present. */
	308	static v4l2_std_id std_mixes[] = {
	309	V4L2_STD_PAL_B \| V4L2_STD_PAL_G,
	310	V4L2_STD_PAL_D \| V4L2_STD_PAL_K,
	311	V4L2_STD_SECAM_B \| V4L2_STD_SECAM_G,
	312	V4L2_STD_SECAM_D \| V4L2_STD_SECAM_K,
	313	};
	314
	315	struct v4l2_standard pvr2_std_create_enum(unsigned int countptr,
	316	v4l2_std_id id)
	317	{
	318	unsigned int std_cnt = 0;
	319	unsigned int idx,bcnt,idx2;
	320	v4l2_std_id idmsk,cmsk,fmsk;
	321	struct v4l2_standard *stddefs;
	322
56585386	323	if (pvrusb2_debug & PVR2_TRACE_STD) {
d855497e MI	324	char buf[50];
	325	bcnt = pvr2_std_id_to_str(buf,sizeof(buf),id);
	326	pvr2_trace(
56585386	327	PVR2_TRACE_STD,"Mapping standards mask=0x%x (%.*s)",
d855497e MI	328	(int)id,bcnt,buf);
	329	}
	330
	331	*countptr = 0;
	332	std_cnt = 0;
	333	fmsk = 0;
	334	for (idmsk = 1, cmsk = id; cmsk; idmsk <<= 1) {
	335	if (!(idmsk & cmsk)) continue;
	336	cmsk &= ~idmsk;
	337	if (match_std(idmsk)) {
	338	std_cnt++;
	339	continue;
	340	}
	341	fmsk \|= idmsk;
	342	}
	343
eca8ebfc	344	for (idx2 = 0; idx2 < ARRAY_SIZE(std_mixes); idx2++) {
d855497e MI	345	if ((id & std_mixes[idx2]) == std_mixes[idx2]) std_cnt++;
	346	}
	347
	348	if (fmsk) {
	349	char buf[50];
	350	bcnt = pvr2_std_id_to_str(buf,sizeof(buf),fmsk);
	351	pvr2_trace(
	352	PVR2_TRACE_ERROR_LEGS,
	353	"WARNING:"
	354	" Failed to classify the following standard(s): %.*s",
	355	bcnt,buf);
	356	}
	357
56585386	358	pvr2_trace(PVR2_TRACE_STD,"Setting up %u unique standard(s)",
d855497e	359	std_cnt);
a0fd1cb1	360	if (!std_cnt) return NULL; // paranoia
d855497e	361
ca545f7c	362	stddefs = kzalloc(sizeof(struct v4l2_standard) * std_cnt,
d855497e	363	GFP_KERNEL);
d855497e MI	364	for (idx = 0; idx < std_cnt; idx++) stddefs[idx].index = idx;
	365
	366	idx = 0;
	367
	368	/* Enumerate potential special cases */
eca8ebfc AD	369	for (idx2 = 0; (idx2 < ARRAY_SIZE(std_mixes)) && (idx < std_cnt);
eca8ebfc AD	370	idx2++) {
d855497e MI	371	if (!(id & std_mixes[idx2])) continue;
	372	if (pvr2_std_fill(stddefs+idx,std_mixes[idx2])) idx++;
	373	}
	374	/* Now enumerate individual pieces */
	375	for (idmsk = 1, cmsk = id; cmsk && (idx < std_cnt); idmsk <<= 1) {
	376	if (!(idmsk & cmsk)) continue;
	377	cmsk &= ~idmsk;
	378	if (!pvr2_std_fill(stddefs+idx,idmsk)) continue;
	379	idx++;
	380	}
	381
	382	*countptr = std_cnt;
	383	return stddefs;
	384	}
	385
	386	v4l2_std_id pvr2_std_get_usable(void)
	387	{
	388	return CSTD_ALL;
	389	}
	390
	391
	392	/*
	393	Stuff for Emacs to see, in order to encourage consistent editing style:
	394	* Local Variables: *
	395	* mode: c *
	396	* fill-column: 75 *
	397	* tab-width: 8 *
	398	* c-basic-offset: 8 *
	399	* End: *
	400	*/