// This is a very simple en300 706 telext decoder.
// It can only decode a single page at a time, thus it's only used
-// for subtitles.
+// for subtitles. And it ONLY support LATIN Charsets yet!
DEFINE_REF(eDVBTeletextParser);
static inline unsigned long decode_hamming_2418(unsigned char *b)
{
+ static const unsigned char rev[16] = {
+ 0x00,0x08,0x04,0x0c,
+ 0x02,0x0a,0x06,0x0e,
+ 0x01,0x09,0x05,0x0d,
+ 0x03,0x0b,0x07,0x0f
+ };
+ b[0] = rev[b[0] >> 4] | (rev[b[0] & 0xf] << 4);
+ b[1] = rev[b[1] >> 4] | (rev[b[1] & 0xf] << 4);
+ b[2] = rev[b[2] >> 4] | (rev[b[2] & 0xf] << 4);
return ((b[0] & 0x04) >> 2) | ((b[0] & 0x70) >> 3) | ((b[1] & 0x7f) << 4) | ((b[2] & 0x7f) << 11);
}
int M = magazine_and_packet_address & 7,
Y = magazine_and_packet_address >> 3;
// eDebug("line %d, framing code: %02x, M=%02x, Y=%02x", line_offset, framing_code, m_M, m_Y);
-
+
if (Y == 0) /* page header */
{
int X = decode_hamming_84(data + 1) * 0x10 + decode_hamming_84(data),
} else if (Y == 26 && m_page_open && M == m_page_M)
{
// int designation_code = decode_hamming_84(data);
- static const unsigned char rev[16] = {
- 0x00,0x08,0x04,0x0c,
- 0x02,0x0a,0x06,0x0e,
- 0x01,0x09,0x05,0x0d,
- 0x03,0x0b,0x07,0x0f
- };
int display_row=-1, display_column=-1;
for (int a = 1; a < 40; a+=3)
{
int val;
- data[a] = rev[data[a] >> 4] | (rev[data[a] & 0xf] << 4);
- data[a+1] = rev[data[a+1] >> 4] | (rev[data[a+1] & 0xf] << 4);
- data[a+2] = rev[data[a+2] >> 4] | (rev[data[a+2] & 0xf] << 4);
if ((val=decode_hamming_2418(data+a)) >= 0)
{
unsigned char addr = val & 0x3F;
}
} else if (Y > 29)
/*eDebug("non handled packet 30, 31", Y, decode_hamming_84(data))*/;
- else if (Y == 29)
- eDebug("non handled packet M/%d/%d", Y, decode_hamming_84(data));
- else if (m_page_open)
+ else if (Y == 29 && M == m_page_M)
+ {
+ int designation_code = decode_hamming_84(data++);
+ if (designation_code == 0) // 29/0
+ {
+ m_M29_t1 = decode_hamming_2418(data);
+ m_M29_t2 = decode_hamming_2418(data+3);
+ if ((m_M29_t1 & 0xF) == 0) // format1
+ m_M29_0_valid = 1;
+ else
+ eDebug("non handled packet M/%d/0 format %d", Y, m_M29_t1 & 0xF);
+ }
+ else
+ eDebug("non handled packet M/%d/%d", Y, designation_code);
+ }
+ else if (m_page_open && M == m_page_M)
{
- if (M == m_page_M)
- eDebug("non handled packet X/%d/%d", Y, decode_hamming_84(data));
+ int designation_code = decode_hamming_84(data++);
+ if (Y == 28 && designation_code == 0) // 28/0
+ {
+#if 1
+ m_X28_t1 = decode_hamming_2418(data);
+ m_X28_t2 = decode_hamming_2418(data+3);
+ if ((m_X28_t1 & 0xF) == 0) // format1
+ m_X28_0_valid = 1;
+ else
+ eDebug("non handled packet X/%d/0 format %d", Y, m_X28_t1 & 0xF);
+#else
+ int i=0;
+ for (; i < 39; i+=3)
+ {
+ int tripletX = decode_hamming_2418(data+i);
+ if (tripletX >= 0)
+ {
+ if (i == 0)
+ {
+ if ((m_X28_t1 & 0xF) == 0) // format1
+ m_X28_0_valid = 1;
+ m_X28_t1 = tripletX;
+ }
+ else if (i == 1)
+ m_X28_t2 = tripletX;
+
+ char *c = get_bits(tripletX, 18);
+ int x=0;
+ for (; x < 18; ++x)
+ eDebugNoNewLine("%c", c[x]);
+ eDebug("");
+ }
+ else
+ eDebug("decode_hamming_2418 failed!\n");
+ data += 3;
+ }
+#endif
+ }
+ else
+ eDebug("non handled packet X/%d/%d", Y, designation_code);
}
}
}
{
if (m_C & (1<<4)) /* erase flag set */
{
- /* we are always erasing the page,
- even when the erase flag is not set. */
m_subtitle_page.clear();
m_modifications.clear();
+ m_X28_0_valid = 0;
+ m_new_subtitle_page(m_subtitle_page);
// eDebug("erase page!");
}
// else
nat_opts = (m_C & (1<<14) ? 1 : 0) |
(m_C & (1<<13) ? 2 : 0) |
(m_C & (1<<12) ? 4 : 0),
- nat_subset = NationalOptionSubsetsLookup[Gtriplet*8+nat_opts];
-/* eDebug("nat_opts = %d, nat_subset = %d, C121314 = %d%d%d",
- nat_opts, nat_subset,
- (m_C & (1<<12))?1:0,
- (m_C & (1<<13))?1:0,
- (m_C & (1<<14))?1:0);*/
+ nat_subset_2 = NationalOptionSubsetsLookup[Gtriplet*8+nat_opts],
+ nat_subset = nat_subset_2,
+ second_G0_set = 0;
+
+ if (m_X28_0_valid)
+ {
+ nat_subset = NationalOptionSubsetsLookup[(m_X28_t1 >> 7) & 0x7F];
+ nat_subset_2 = NationalOptionSubsetsLookup[((m_X28_t1 >> 14) & 0xF) | ((m_X28_t2 & 7) << 4)];
+// eDebug("X/28/0 nat_subset %d, nat_subset2 %d", nat_subset, nat_subset_2);
+ }
+ else if (m_M29_0_valid)
+ {
+ nat_subset = NationalOptionSubsetsLookup[(m_M29_t1 >> 7) & 0x7F];
+ nat_subset_2 = NationalOptionSubsetsLookup[((m_M29_t1 >> 14) & 0xF) | ((m_M29_t2 & 7) << 4)];
+// eDebug("M/29/0 nat_subset %d, nat_subset2 %d", nat_subset, nat_subset_2);
+ }
+/* else
+ eDebug("nat_opts = %d, nat_subset = %d, C121314 = %d%d%d",
+ nat_opts, nat_subset,
+ (m_C & (1<<12))?1:0,
+ (m_C & (1<<13))?1:0,
+ (m_C & (1<<14))?1:0);*/
// eDebug("handle subtitle line: %d len", len);
for (int i=0; i<len; ++i)
{
+ unsigned char b = decode_odd_parity(data + i);
std::map<int,unsigned int>::iterator it = m_modifications.find((m_Y<<16)|i);
+
if (it != m_modifications.end())
{
unsigned int utf8_code = it->second;
+// eDebugNoNewLine("%c[%d]", b, b);
if (utf8_code < 0x10)
{
int mode = utf8_code;
- unsigned char ch = decode_odd_parity(data + i);
- if (ch > 96 && ch < 123)
- utf8_code = diacr_lower_cmap[(ch-97)*15+mode-1];
- else if (ch > 64 && ch < 91)
- utf8_code = diacr_upper_cmap[(ch-65)*15+mode-1];
+ if (b > 96 && b < 123)
+ utf8_code = diacr_lower_cmap[(b-97)*15+mode-1];
+ else if (b > 64 && b < 91)
+ utf8_code = diacr_upper_cmap[(b-65)*15+mode-1];
}
if (utf8_code > 0xFFFFFF)
out[outidx++]=(utf8_code&0xFF000000)>>24;
continue;
}
- unsigned char b = decode_odd_parity(data + i);
-
if (b < 0x10) /* spacing attribute */
{
if (b < 8) /* colors */
/* ignore other attributes */
} else if (m_box_open>1)
{
- //eDebugNoNewLine("%c", b);
+// eDebugNoNewLine("%c(%d)", b, b);
/* no more than one whitespace, only printable chars */
if (((!last_was_white) || (b != ' ')) && (b >= 0x20))
{
- int cur_nat_subset = nat_subset;
-
- if (b == 0x24) // workaround for currency sign.. the only on non latin1 char in G0 set
- {
- cur_nat_subset = 9;
- b = 36;
- }
+ int cur_nat_subset = second_G0_set ? nat_subset_2 : nat_subset;
unsigned char offs = NationalReplaceMap[b];
if (offs)
out[outidx++] = b;
last_was_white = b == ' ';
}
+ else if (b == 0x1b) // ESC ... switch between default G0 and second G0 charset
+ second_G0_set ^= 1;
}
}
- //eDebug("");
+// eDebug("");
addSubtitleString(color, std::string((const char*)out, outidx));
}
eDebug("enable teletext subtitle page %x%02x", magazine, page);
else
eDebug("disable teletext subtitles");
+ m_M29_0_valid = 0;
m_page_M = magazine; /* magazine to look for */
if (magazine != -1)
m_page_M &= 7;
git.cweiske.de / enigma2.git / blobdiff