[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"

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 */
const static struct std_name std_groups[] = {
	{"PAL",CSTD_PAL},
	{"NTSC",CSTD_NTSC},
	{"SECAM",CSTD_SECAM},
};

/* Mapping of standard bits to modulation system */
const static 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 0;
}


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,
				sizeof(std_groups)/sizeof(std_groups[0]),
				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,
				   sizeof(std_items)/sizeof(std_items[0]),
				   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 < sizeof(std_groups)/sizeof(std_groups[0]);
	     idx1++) {
		gp = std_groups + idx1;
		gfl = 0;
		for (idx2 = 0;
		     idx2 < sizeof(std_items)/sizeof(std_items[0]);
		     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 (sizeof(generic_standards)/sizeof(generic_standards[0]))

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 0;
}

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_INIT,"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_INIT) {
		char buf[50];
		bcnt = pvr2_std_id_to_str(buf,sizeof(buf),id);
		pvr2_trace(
			PVR2_TRACE_INIT,"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 < sizeof(std_mixes)/sizeof(std_mixes[0]); 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_INIT,"Setting up %u unique standard(s)",
		   std_cnt);
	if (!std_cnt) return 0; // paranoia

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

	idx = 0;

	/* Enumerate potential special cases */
	for (idx2 = 0; ((idx2 < sizeof(std_mixes)/sizeof(std_mixes[0])) &&
			(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"
	24
	25	struct std_name {
	26	const char *name;
	27	v4l2_std_id id;
	28	};
	29
	30
	31	#define CSTD_PAL \
	32	(V4L2_STD_PAL_B\| \
	33	V4L2_STD_PAL_B1\| \
	34	V4L2_STD_PAL_G\| \
	35	V4L2_STD_PAL_H\| \
	36	V4L2_STD_PAL_I\| \
	37	V4L2_STD_PAL_D\| \
	38	V4L2_STD_PAL_D1\| \
	39	V4L2_STD_PAL_K\| \
	40	V4L2_STD_PAL_M\| \
	41	V4L2_STD_PAL_N\| \
	42	V4L2_STD_PAL_Nc\| \
	43	V4L2_STD_PAL_60)
	44
	45	#define CSTD_NTSC \
	46	(V4L2_STD_NTSC_M\| \
	47	V4L2_STD_NTSC_M_JP\| \
	48	V4L2_STD_NTSC_M_KR\| \
	49	V4L2_STD_NTSC_443)
	50
	51	#define CSTD_SECAM \
	52	(V4L2_STD_SECAM_B\| \
	53	V4L2_STD_SECAM_D\| \
	54	V4L2_STD_SECAM_G\| \
	55	V4L2_STD_SECAM_H\| \
	56	V4L2_STD_SECAM_K\| \
	57	V4L2_STD_SECAM_K1\| \
	58	V4L2_STD_SECAM_L\| \
	59	V4L2_STD_SECAM_LC)
	60
	61	#define TSTD_B (V4L2_STD_PAL_B\|V4L2_STD_SECAM_B)
	62	#define TSTD_B1 (V4L2_STD_PAL_B1)
	63	#define TSTD_D (V4L2_STD_PAL_D\|V4L2_STD_SECAM_D)
	64	#define TSTD_D1 (V4L2_STD_PAL_D1)
65	#define TSTD_G (V4L2_STD_PAL_G\|V4L2_STD_SECAM_G)
66	#define TSTD_H (V4L2_STD_PAL_H\|V4L2_STD_SECAM_H)
67	#define TSTD_I (V4L2_STD_PAL_I)
68	#define TSTD_K (V4L2_STD_PAL_K\|V4L2_STD_SECAM_K)
69	#define TSTD_K1 (V4L2_STD_SECAM_K1)
70	#define TSTD_L (V4L2_STD_SECAM_L)
71	#define TSTD_M (V4L2_STD_PAL_M\|V4L2_STD_NTSC_M)
72	#define TSTD_N (V4L2_STD_PAL_N)
73	#define TSTD_Nc (V4L2_STD_PAL_Nc)
74	#define TSTD_60 (V4L2_STD_PAL_60)
75
76	#define CSTD_ALL (CSTD_PAL\|CSTD_NTSC\|CSTD_SECAM)
77
78	/* Mapping of standard bits to color system */
79	const static struct std_name std_groups[] = {
80	{"PAL",CSTD_PAL},
81	{"NTSC",CSTD_NTSC},
82	{"SECAM",CSTD_SECAM},
83	};
84
85	/* Mapping of standard bits to modulation system */
86	const static struct std_name std_items[] = {
87	{"B",TSTD_B},
88	{"B1",TSTD_B1},
89	{"D",TSTD_D},
90	{"D1",TSTD_D1},
91	{"G",TSTD_G},
92	{"H",TSTD_H},
93	{"I",TSTD_I},
94	{"K",TSTD_K},
95	{"K1",TSTD_K1},
96	{"L",TSTD_L},
97	{"LC",V4L2_STD_SECAM_LC},
98	{"M",TSTD_M},
99	{"Mj",V4L2_STD_NTSC_M_JP},
100	{"443",V4L2_STD_NTSC_443},
101	{"Mk",V4L2_STD_NTSC_M_KR},
102	{"N",TSTD_N},
103	{"Nc",TSTD_Nc},
104	{"60",TSTD_60},
105	};
106
107
108	// Search an array of std_name structures and return a pointer to the
109	// element with the matching name.
110	static const struct std_name find_std_name(const struct std_name arrPtr,
111	unsigned int arrSize,
112	const char *bufPtr,
113	unsigned int bufSize)
114	{
115	unsigned int idx;
116	const struct std_name *p;
117	for (idx = 0; idx < arrSize; idx++) {
118	p = arrPtr + idx;
119	if (strlen(p->name) != bufSize) continue;
120	if (!memcmp(bufPtr,p->name,bufSize)) return p;
121	}
122	return 0;
123	}
124
125
126	int pvr2_std_str_to_id(v4l2_std_id idPtr,const char bufPtr,
127	unsigned int bufSize)
128	{
129	v4l2_std_id id = 0;
130	v4l2_std_id cmsk = 0;
131	v4l2_std_id t;
132	int mMode = 0;
133	unsigned int cnt;
134	char ch;
135	const struct std_name *sp;
136
137	while (bufSize) {
138	if (!mMode) {
139	cnt = 0;
140	while ((cnt < bufSize) && (bufPtr[cnt] != '-')) cnt++;
141	if (cnt >= bufSize) return 0; // No more characters
142	sp = find_std_name(
143	std_groups,
144	sizeof(std_groups)/sizeof(std_groups[0]),
145	bufPtr,cnt);
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	}
164	sp = find_std_name(std_items,
165	sizeof(std_items)/sizeof(std_items[0]),
166	bufPtr,cnt);
167	if (!sp) return 0; // Illegal modulation system ID
168	t = sp->id & cmsk;
169	if (!t) return 0; // Specific color + modulation system illegal
170	id \|= t;
171	if (cnt < bufSize) cnt++;
172	bufPtr += cnt;
173	bufSize -= cnt;
174	}
175
176	if (idPtr) *idPtr = id;
177	return !0;
178	}
179
180
181	unsigned int pvr2_std_id_to_str(char *bufPtr, unsigned int bufSize,
182	v4l2_std_id id)
183	{
184	unsigned int idx1,idx2;
185	const struct std_name ip,gp;
186	int gfl,cfl;
187	unsigned int c1,c2;
188	cfl = 0;
189	c1 = 0;
190	for (idx1 = 0;
191	idx1 < sizeof(std_groups)/sizeof(std_groups[0]);
192	idx1++) {
193	gp = std_groups + idx1;
194	gfl = 0;
195	for (idx2 = 0;
196	idx2 < sizeof(std_items)/sizeof(std_items[0]);
197	idx2++) {
198	ip = std_items + idx2;
199	if (!(gp->id & ip->id & id)) continue;
200	if (!gfl) {
201	if (cfl) {
202	c2 = scnprintf(bufPtr,bufSize,";");
203	c1 += c2;
204	bufSize -= c2;
205	bufPtr += c2;
206	}
207	cfl = !0;
208	c2 = scnprintf(bufPtr,bufSize,
209	"%s-",gp->name);
210	gfl = !0;
211	} else {
212	c2 = scnprintf(bufPtr,bufSize,"/");
213	}
214	c1 += c2;
215	bufSize -= c2;
216	bufPtr += c2;
217	c2 = scnprintf(bufPtr,bufSize,
218	ip->name);
219	c1 += c2;
220	bufSize -= c2;
221	bufPtr += c2;
222	}
223	}
224	return c1;
225	}
226
227
228	// Template data for possible enumerated video standards. Here we group
229	// standards which share common frame rates and resolution.
230	static struct v4l2_standard generic_standards[] = {
231	{
232	.id = (TSTD_B\|TSTD_B1\|
233	TSTD_D\|TSTD_D1\|
234	TSTD_G\|
235	TSTD_H\|
236	TSTD_I\|
237	TSTD_K\|TSTD_K1\|
238	TSTD_L\|
239	V4L2_STD_SECAM_LC \|
240	TSTD_N\|TSTD_Nc),
241	.frameperiod =
242	{
243	.numerator = 1,
244	.denominator= 25
245	},
246	.framelines = 625,
247	.reserved = {0,0,0,0}
248	}, {
249	.id = (TSTD_M\|
250	V4L2_STD_NTSC_M_JP\|
251	V4L2_STD_NTSC_M_KR),
252	.frameperiod =
253	{
254	.numerator = 1001,
255	.denominator= 30000
256	},
257	.framelines = 525,
258	.reserved = {0,0,0,0}
259	}, { // This is a total wild guess
260	.id = (TSTD_60),
261	.frameperiod =
262	{
263	.numerator = 1001,
264	.denominator= 30000
265	},
266	.framelines = 525,
267	.reserved = {0,0,0,0}
268	}, { // This is total wild guess
269	.id = V4L2_STD_NTSC_443,
270	.frameperiod =
271	{
272	.numerator = 1001,
273	.denominator= 30000
274	},
275	.framelines = 525,
276	.reserved = {0,0,0,0}
277	}
278	};
279
280	#define generic_standards_cnt (sizeof(generic_standards)/sizeof(generic_standards[0]))
281
282	static struct v4l2_standard *match_std(v4l2_std_id id)
283	{
284	unsigned int idx;
285	for (idx = 0; idx < generic_standards_cnt; idx++) {
286	if (generic_standards[idx].id & id) {
287	return generic_standards + idx;
288	}
289	}
290	return 0;
291	}
292
293	static int pvr2_std_fill(struct v4l2_standard *std,v4l2_std_id id)
294	{
295	struct v4l2_standard *template;
296	int idx;
297	unsigned int bcnt;
298	template = match_std(id);
299	if (!template) return 0;
300	idx = std->index;
301	memcpy(std,template,sizeof(*template));
302	std->index = idx;
303	std->id = id;
304	bcnt = pvr2_std_id_to_str(std->name,sizeof(std->name)-1,id);
305	std->name[bcnt] = 0;
306	pvr2_trace(PVR2_TRACE_INIT,"Set up standard idx=%u name=%s",
307	std->index,std->name);
308	return !0;
309	}
310
311	/* These are special cases of combined standards that we should enumerate
312	separately if the component pieces are present. */
313	static v4l2_std_id std_mixes[] = {
314	V4L2_STD_PAL_B \| V4L2_STD_PAL_G,
315	V4L2_STD_PAL_D \| V4L2_STD_PAL_K,
316	V4L2_STD_SECAM_B \| V4L2_STD_SECAM_G,
317	V4L2_STD_SECAM_D \| V4L2_STD_SECAM_K,
318	};
319
320	struct v4l2_standard pvr2_std_create_enum(unsigned int countptr,
321	v4l2_std_id id)
322	{
323	unsigned int std_cnt = 0;
324	unsigned int idx,bcnt,idx2;
325	v4l2_std_id idmsk,cmsk,fmsk;
326	struct v4l2_standard *stddefs;
327
328	if (pvrusb2_debug & PVR2_TRACE_INIT) {
329	char buf[50];
330	bcnt = pvr2_std_id_to_str(buf,sizeof(buf),id);
331	pvr2_trace(
332	PVR2_TRACE_INIT,"Mapping standards mask=0x%x (%.*s)",
333	(int)id,bcnt,buf);
334	}
335
336	*countptr = 0;
337	std_cnt = 0;
338	fmsk = 0;
339	for (idmsk = 1, cmsk = id; cmsk; idmsk <<= 1) {
340	if (!(idmsk & cmsk)) continue;
341	cmsk &= ~idmsk;
342	if (match_std(idmsk)) {
343	std_cnt++;
344	continue;
345	}
346	fmsk \|= idmsk;
347	}
348
349	for (idx2 = 0; idx2 < sizeof(std_mixes)/sizeof(std_mixes[0]); idx2++) {
350	if ((id & std_mixes[idx2]) == std_mixes[idx2]) std_cnt++;
351	}
352
353	if (fmsk) {
354	char buf[50];
355	bcnt = pvr2_std_id_to_str(buf,sizeof(buf),fmsk);
356	pvr2_trace(
357	PVR2_TRACE_ERROR_LEGS,
358	"WARNING:"
359	" Failed to classify the following standard(s): %.*s",
360	bcnt,buf);
361	}
362
363	pvr2_trace(PVR2_TRACE_INIT,"Setting up %u unique standard(s)",
364	std_cnt);
365	if (!std_cnt) return 0; // paranoia
366
367	stddefs = kmalloc(sizeof(struct v4l2_standard) * std_cnt,
368	GFP_KERNEL);
369	memset(stddefs,0,sizeof(struct v4l2_standard) * std_cnt);
370	for (idx = 0; idx < std_cnt; idx++) stddefs[idx].index = idx;
371
372	idx = 0;
373
374	/* Enumerate potential special cases */
375	for (idx2 = 0; ((idx2 < sizeof(std_mixes)/sizeof(std_mixes[0])) &&
376	(idx < std_cnt)); idx2++) {
377	if (!(id & std_mixes[idx2])) continue;
378	if (pvr2_std_fill(stddefs+idx,std_mixes[idx2])) idx++;
379	}
380	/* Now enumerate individual pieces */
381	for (idmsk = 1, cmsk = id; cmsk && (idx < std_cnt); idmsk <<= 1) {
382	if (!(idmsk & cmsk)) continue;
383	cmsk &= ~idmsk;
384	if (!pvr2_std_fill(stddefs+idx,idmsk)) continue;
385	idx++;
386	}
387
388	*countptr = std_cnt;
389	return stddefs;
390	}
391
392	v4l2_std_id pvr2_std_get_usable(void)
393	{
394	return CSTD_ALL;
395	}
396
397
398	/*
399	Stuff for Emacs to see, in order to encourage consistent editing style:
400	* Local Variables: *
401	* mode: c *
402	* fill-column: 75 *
403	* tab-width: 8 *
404	* c-basic-offset: 8 *
405	* End: *
406	*/