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// SPDX-License-Identifier: GPL-2.0-only
/*
*
* Copyright (C) 2005 Mike Isely <isely@pobox.com>
*/
#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_ATSC \
(V4L2_STD_ATSC_8_VSB| \
V4L2_STD_ATSC_16_VSB)
#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_ATSC|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},
{"ATSC",CSTD_ATSC},
};
/* 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},
{"8VSB",V4L2_STD_ATSC_8_VSB},
{"16VSB",V4L2_STD_ATSC_16_VSB},
};
// 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;
}
v4l2_std_id pvr2_std_get_usable(void)
{
return CSTD_ALL;
}
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