// Decode a text string according to ETSI EN 300 468 Annex A
QString dvb_decode_text(const unsigned char *src, uint raw_length,
const unsigned char *encoding_override,
uint encoding_override_length)
{
if (!raw_length)
return "";
if (src[0] == 0x1f)
return freesat_huffman_to_string(src, raw_length);
/* UCS-2 aka ISO/IEC 10646-1 Basic Multilingual Plane */
if (src[0] == 0x11)
{
size_t length = (raw_length - 1) / 2;
QChar *to = new QChar[length];
for (size_t i=0; i<length; i++)
to[i] = (src[1 + i*2] << 8) + src[1 + i*2 + 1];
QString to2(to, length);
delete [] to;
return to2;
}
if (((0x11 < src[0]) && (src[0] < 0x15)) ||
((0x15 < src[0]) && (src[0] < 0x1f)))
{
// TODO: Handle multi-byte encodings
LOG(VB_SIPARSER, LOG_ERR,
"dvb_decode_text: Multi-byte coded text is not yet supported.");
return "";
}
// if a override encoding is specified and the default ISO 6937 encoding
// would be used copy the override encoding in front of the text
unsigned char *dst =
new unsigned char[raw_length + encoding_override_length];
uint length = 0;
if (encoding_override && src[0] >= 0x20) {
memcpy(dst, encoding_override, encoding_override_length);
length = encoding_override_length;
}
// Strip formatting characters
for (uint i = 0; i < raw_length; i++)
{
if ((src[i] < 0x80) || (src[i] > 0x9F))
dst[length++] = src[i];
// replace CR/LF with a space
else if (src[i] == 0x8A)
dst[length++] = 0x20;
}
// Exit on empty string, sans formatting.
QString sStr = (!length) ? "" : decode_text(dst, length);
delete [] dst;
return sStr;
}
// Decode a text string according to ETSI EN 300 468 Annex A
QString dvb_decode_text(const unsigned char *src, uint raw_length,
const unsigned char *encoding_override,
uint encoding_override_length)
{
if (!raw_length)
return "";
if (src[0] == 0x1f)
return freesat_huffman_to_string(src, raw_length);
if ((0x10 < src[0]) && (src[0] < 0x20))
{
// TODO: Handle multi-byte encodings
VERBOSE(VB_SIPARSER, "dvb_decode_text: "
"Multi-byte coded text is not yet supported.");
return "";
}
// if a override encoding is specified and the default ISO 6937 encoding
// would be used copy the override encoding in front of the text
unsigned char *dst = new unsigned char[ raw_length + encoding_override_length ];
uint length = 0;
if (encoding_override && src[0] >= 0x20) {
memcpy(dst, encoding_override, encoding_override_length);
length = encoding_override_length;
}
// Strip formatting characters
for (uint i = 0; i < raw_length; i++)
{
if ((src[i] < 0x80) || (src[i] > 0x9F))
dst[length++] = src[i];
// replace CR/LF with a space
else if (src[i] == 0x8A)
dst[length++] = 0x20;
}
// Exit on empty string, sans formatting.
QString sStr = (!length) ? "" : decode_text(dst, length);
delete [] dst;
return sStr;
}
/*
* Convert the DVB text in the string passed in.
* If the buffer is Freesat huffman encoded, then decode that.
* Text is converted to UTF-8 and XML entities are encoded.
*/
const char *convert_text(const char *s) {
char cs_new[16];
size_t ret;
int i = (int) (unsigned char) s[0];
if (i < 0x1F) {
if (encoding[i].handler(cs_new, &s, encoding[i].data))
return "";
} else {
if (encoding_default(cs_new, &s, NULL))
return "";
}
if (i == 0x1F) {
s = (char *) freesat_huffman_to_string((unsigned char *) s, strlen(s));
}
if (strncmp(cs_old, cs_new, 16)) {
if (cd) {
iconv_close(cd);
cd = NULL;
} // if
cd = iconv_open("UTF-8", cs_new);
if (cd == (iconv_t) - 1) {
log_message(ERROR, "iconv_open() failed: %s", strerror(errno));
exit(1);
} // if
strncpy(cs_old, cs_new, 16);
} // if
char *inbuf = (char *) s;
size_t inbytesleft = strlen(s);
char *outbuf = (char *) buf;
size_t outbytesleft = sizeof(buf);
ret = iconv(cd, &inbuf, &inbytesleft, &outbuf, &outbytesleft);
*outbuf = 0;
// FIXME: handle errors
return xmlify(buf);
}
