vbilut.cpp File Reference

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Functions

int hamm8 (const uint8_t *p, int *err)
int hamm84 (const uint8_t *p, int *err)
int hamm16 (const uint8_t *p, int *err)

Variables

const uint8_t lang_chars [1+8+8][16]
const char chartab_original [13]
const unsigned short hammtab [256]
const uint8_t hamm84tab [256]
const uint8_t unham84tab [256]
const uint8_t vbi_bit_reverse [256]
const char * formats [8]
const char * subtitles [4]
const char hamm24par [3][256]
 This table generates the parity checks for hamm24/18 decoding.
const char hamm24val [256]
 Table to extract the lower 4 bit from hamm24/18 encoded bytes.
const short hamm24err [64]
 Mapping from parity checks made by table hamm24par to error results return by hamm24.
const int hamm24cor [64]
 Mapping from parity checks made by table hamm24par to faulty bit in the decoded 18 bit word.

Function Documentation

int hamm8 ( const uint8_t *  p,
int *  err 
)

Definition at line 328 of file vbilut.cpp.

Referenced by vt_line().

int hamm84 ( const uint8_t *  p,
int *  err 
)

Definition at line 335 of file vbilut.cpp.

Referenced by TeletextDecoder::Decode().

int hamm16 ( const uint8_t *  p,
int *  err 
)

Definition at line 345 of file vbilut.cpp.

Referenced by TeletextDecoder::Decode(), and vt_line().

Variable Documentation

const uint8_t lang_chars[1+8+8][16]

Definition at line 4 of file vbilut.cpp.

Referenced by conv2latin(), cvt_char(), and lang_init().

const char chartab_original[13]

Initial value:

{
    '#', '¤', '@', '[', '\\', ']', '^', '_', '\'', '{', '|', '}', '~'
}

Definition at line 47 of file vbilut.cpp.

const unsigned short hammtab[256]

Definition at line 52 of file vbilut.cpp.

Referenced by hamm16(), and hamm8().

const uint8_t hamm84tab[256]

Initial value:

{
    255,255,255,255,255,255,255,255,255,  0, 
    255,  8,255,255,255,255,255,255,255,255, 
    255,255,255,255,255,255,255,255,  6,255, 
     14,255,255,255,255,255, 12,255,  4,255, 
    255,255,255,255,255,255,255,255,255, 10, 
    255,  2,255,255,255,255,255,255,255,255, 
    255,255,255,255,  1,255,  9,255,255,255, 
    255,255,255,255,255,255,255,255,255,255, 
    255,255,255,255,255,  7,255, 15,255,255, 
    255,255,255,255,255,255,255,255,255,255, 
    255,255,255,255,255,255,255,255,255, 13, 
    255,  5,255,255,255,255,255,255,255,255, 
     11,255,  3,255,255,255,255,255,255,255, 
    255,255,255, 12,255,  4,255,255,255,255, 
    255,255,255,255, 10,255,  2,255,255,255, 
    255,255,255,255,255,255,255,255,255,255, 
    255,255,255,255,255,255,255,255,  0,255, 
      8,255,255,255,255,255,255,255,255,255, 
    255,255,255,255,255,255,255,255,255,  6, 
    255, 14,255,255,255,255,255,255,255,255, 
    255,255,255,255, 13,255,  5,255,255,255, 
    255,255,255,255,255,255,255, 11,255,  3, 
    255,255,255,255,255,  1,255,  9,255,255, 
    255,255,255,255,255,255,255,255,255,255, 
    255,255,255,255,  7,255, 15,255,255,255, 
    255,255,255,255,255,255 }

Definition at line 88 of file vbilut.cpp.

Referenced by hamm84().

const uint8_t unham84tab[256]

Definition at line 118 of file vbilut.cpp.

const uint8_t vbi_bit_reverse[256]

Definition at line 154 of file vbilut.cpp.

Referenced by CC608Decoder::DecodeVPS().

const char* formats[8]

Initial value:

{
    "Full format 4:3, 576 lines",
    "Letterbox 14:9 centre, 504 lines",
    "Letterbox 14:9 top, 504 lines",
    "Letterbox 16:9 centre, 430 lines",
    "Letterbox 16:9 top, 430 lines",
    "Letterbox > 16:9 centre",
    "Full format 14:9 centre, 576 lines",
    "Anamorphic 16:9, 576 lines"
}

Definition at line 190 of file vbilut.cpp.

Referenced by CC608Decoder::DecodeWSS(), CoreAudioData::FindAC3Stream(), ZMPlayer::getXvPortId(), Player::getXvPortId(), VideoOutputXv::InitXVideo(), CoreAudioData::OpenSPDIF(), and CoreAudioData::ResetStream().

const char* subtitles[4]

Initial value:

{
    "none",
    "in active image area",
    "out of active image area",
    "?"
}

Definition at line 202 of file vbilut.cpp.

Referenced by CC608Decoder::DecodeWSS(), MTD::sendMediaReport(), and TitleDialog::showCurrentTitle().

const char hamm24par[3][256]

This table generates the parity checks for hamm24/18 decoding.

bit 0 is for test A, 1 for B, ... thanks to R. Gancarz for this fine table *g*

Definition at line 214 of file vbilut.cpp.

Referenced by chk_parity(), and hamm24().

const char hamm24val[256]

Initial value:

{
      0,  0,  0,  0,  1,  1,  1,  1,  0,  0,  0,  0,  1,  1,  1,  1,
      2,  2,  2,  2,  3,  3,  3,  3,  2,  2,  2,  2,  3,  3,  3,  3,
      4,  4,  4,  4,  5,  5,  5,  5,  4,  4,  4,  4,  5,  5,  5,  5,
      6,  6,  6,  6,  7,  7,  7,  7,  6,  6,  6,  6,  7,  7,  7,  7,
      8,  8,  8,  8,  9,  9,  9,  9,  8,  8,  8,  8,  9,  9,  9,  9,
     10, 10, 10, 10, 11, 11, 11, 11, 10, 10, 10, 10, 11, 11, 11, 11,
     12, 12, 12, 12, 13, 13, 13, 13, 12, 12, 12, 12, 13, 13, 13, 13,
     14, 14, 14, 14, 15, 15, 15, 15, 14, 14, 14, 14, 15, 15, 15, 15,
      0,  0,  0,  0,  1,  1,  1,  1,  0,  0,  0,  0,  1,  1,  1,  1,
      2,  2,  2,  2,  3,  3,  3,  3,  2,  2,  2,  2,  3,  3,  3,  3,
      4,  4,  4,  4,  5,  5,  5,  5,  4,  4,  4,  4,  5,  5,  5,  5,
      6,  6,  6,  6,  7,  7,  7,  7,  6,  6,  6,  6,  7,  7,  7,  7,
      8,  8,  8,  8,  9,  9,  9,  9,  8,  8,  8,  8,  9,  9,  9,  9,
     10, 10, 10, 10, 11, 11, 11, 11, 10, 10, 10, 10, 11, 11, 11, 11,
     12, 12, 12, 12, 13, 13, 13, 13, 12, 12, 12, 12, 13, 13, 13, 13,
     14, 14, 14, 14, 15, 15, 15, 15, 14, 14, 14, 14, 15, 15, 15, 15
}
Table to extract the lower 4 bit from hamm24/18 encoded bytes.

Definition at line 274 of file vbilut.cpp.

Referenced by hamm24().

const short hamm24err[64]

Initial value:

{
    0x0000, 0x1000, 0x1000, 0x1000, 0x1000, 0x1000, 0x1000, 0x1000,
    0x1000, 0x1000, 0x1000, 0x1000, 0x1000, 0x1000, 0x1000, 0x1000,
    0x1000, 0x1000, 0x1000, 0x1000, 0x1000, 0x1000, 0x1000, 0x1000,
    0x1000, 0x1000, 0x1000, 0x1000, 0x1000, 0x1000, 0x1000, 0x1000,
    0x0100, 0x0100, 0x0100, 0x0100, 0x0100, 0x0100, 0x0100, 0x0100,
    0x0100, 0x0100, 0x0100, 0x0100, 0x0100, 0x0100, 0x0100, 0x0100,
    0x0100, 0x0100, 0x0100, 0x0100, 0x0100, 0x0100, 0x0100, 0x0100,
    0x1000, 0x1000, 0x1000, 0x1000, 0x1000, 0x1000, 0x1000, 0x1000,
}
Mapping from parity checks made by table hamm24par to error results return by hamm24.

(0 = no error, 0x0100 = single bit error, 0x1000 = double error)

Definition at line 300 of file vbilut.cpp.

Referenced by hamm24().

const int hamm24cor[64]

Initial value:

{
    0x00000, 0x00000, 0x00000, 0x00000, 0x00000, 0x00000, 0x00000, 0x00000,
    0x00000, 0x00000, 0x00000, 0x00000, 0x00000, 0x00000, 0x00000, 0x00000,
    0x00000, 0x00000, 0x00000, 0x00000, 0x00000, 0x00000, 0x00000, 0x00000,
    0x00000, 0x00000, 0x00000, 0x00000, 0x00000, 0x00000, 0x00000, 0x00000,
    0x00000, 0x00000, 0x00000, 0x00001, 0x00000, 0x00002, 0x00004, 0x00008,
    0x00000, 0x00010, 0x00020, 0x00040, 0x00080, 0x00100, 0x00200, 0x00400,
    0x00000, 0x00800, 0x01000, 0x02000, 0x04000, 0x08000, 0x10000, 0x20000,
    0x00000, 0x00000, 0x00000, 0x00000, 0x00000, 0x00000, 0x00000, 0x00000,
}
Mapping from parity checks made by table hamm24par to faulty bit in the decoded 18 bit word.

Definition at line 316 of file vbilut.cpp.

Referenced by hamm24().

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